// SPDX-License-Identifier: GPL-1.0+
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/*
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* $Id: synclinkmp.c,v 4.38 2005/07/15 13:29:44 paulkf Exp $
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*
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* Device driver for Microgate SyncLink Multiport
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* high speed multiprotocol serial adapter.
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*
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* written by Paul Fulghum for Microgate Corporation
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* paulkf@microgate.com
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*
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* Microgate and SyncLink are trademarks of Microgate Corporation
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*
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* Derived from serial.c written by Theodore Ts'o and Linus Torvalds
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#define VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq))
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#if defined(__i386__)
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# define BREAKPOINT() asm(" int $3");
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#else
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# define BREAKPOINT() { }
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#endif
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#define MAX_DEVICES 12
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/signal.h>
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#include <linux/sched.h>
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#include <linux/timer.h>
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#include <linux/interrupt.h>
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#include <linux/pci.h>
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#include <linux/tty.h>
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#include <linux/tty_flip.h>
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#include <linux/serial.h>
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#include <linux/major.h>
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#include <linux/string.h>
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#include <linux/fcntl.h>
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#include <linux/ptrace.h>
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#include <linux/ioport.h>
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#include <linux/mm.h>
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#include <linux/seq_file.h>
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#include <linux/slab.h>
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#include <linux/netdevice.h>
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#include <linux/vmalloc.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/ioctl.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/dma.h>
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#include <linux/bitops.h>
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#include <asm/types.h>
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#include <linux/termios.h>
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#include <linux/workqueue.h>
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#include <linux/hdlc.h>
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#include <linux/synclink.h>
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#if defined(CONFIG_HDLC) || (defined(CONFIG_HDLC_MODULE) && defined(CONFIG_SYNCLINKMP_MODULE))
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#define SYNCLINK_GENERIC_HDLC 1
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#else
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#define SYNCLINK_GENERIC_HDLC 0
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#endif
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#define GET_USER(error,value,addr) error = get_user(value,addr)
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#define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0
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#define PUT_USER(error,value,addr) error = put_user(value,addr)
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#define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0
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#include <linux/uaccess.h>
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static MGSL_PARAMS default_params = {
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MGSL_MODE_HDLC, /* unsigned long mode */
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0, /* unsigned char loopback; */
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HDLC_FLAG_UNDERRUN_ABORT15, /* unsigned short flags; */
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HDLC_ENCODING_NRZI_SPACE, /* unsigned char encoding; */
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0, /* unsigned long clock_speed; */
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0xff, /* unsigned char addr_filter; */
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HDLC_CRC_16_CCITT, /* unsigned short crc_type; */
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HDLC_PREAMBLE_LENGTH_8BITS, /* unsigned char preamble_length; */
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HDLC_PREAMBLE_PATTERN_NONE, /* unsigned char preamble; */
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9600, /* unsigned long data_rate; */
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8, /* unsigned char data_bits; */
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1, /* unsigned char stop_bits; */
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ASYNC_PARITY_NONE /* unsigned char parity; */
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};
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/* size in bytes of DMA data buffers */
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#define SCABUFSIZE 1024
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#define SCA_MEM_SIZE 0x40000
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#define SCA_BASE_SIZE 512
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#define SCA_REG_SIZE 16
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#define SCA_MAX_PORTS 4
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#define SCAMAXDESC 128
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#define BUFFERLISTSIZE 4096
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/* SCA-I style DMA buffer descriptor */
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typedef struct _SCADESC
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{
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u16 next; /* lower l6 bits of next descriptor addr */
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u16 buf_ptr; /* lower 16 bits of buffer addr */
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u8 buf_base; /* upper 8 bits of buffer addr */
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u8 pad1;
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u16 length; /* length of buffer */
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u8 status; /* status of buffer */
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u8 pad2;
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} SCADESC, *PSCADESC;
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typedef struct _SCADESC_EX
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{
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/* device driver bookkeeping section */
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char *virt_addr; /* virtual address of data buffer */
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u16 phys_entry; /* lower 16-bits of physical address of this descriptor */
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} SCADESC_EX, *PSCADESC_EX;
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/* The queue of BH actions to be performed */
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#define BH_RECEIVE 1
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#define BH_TRANSMIT 2
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#define BH_STATUS 4
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#define IO_PIN_SHUTDOWN_LIMIT 100
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struct _input_signal_events {
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int ri_up;
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int ri_down;
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int dsr_up;
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int dsr_down;
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int dcd_up;
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int dcd_down;
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int cts_up;
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int cts_down;
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};
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/*
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* Device instance data structure
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*/
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typedef struct _synclinkmp_info {
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void *if_ptr; /* General purpose pointer (used by SPPP) */
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int magic;
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struct tty_port port;
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int line;
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unsigned short close_delay;
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unsigned short closing_wait; /* time to wait before closing */
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struct mgsl_icount icount;
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int timeout;
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int x_char; /* xon/xoff character */
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u16 read_status_mask1; /* break detection (SR1 indications) */
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u16 read_status_mask2; /* parity/framing/overun (SR2 indications) */
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unsigned char ignore_status_mask1; /* break detection (SR1 indications) */
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unsigned char ignore_status_mask2; /* parity/framing/overun (SR2 indications) */
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unsigned char *tx_buf;
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int tx_put;
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int tx_get;
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int tx_count;
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wait_queue_head_t status_event_wait_q;
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wait_queue_head_t event_wait_q;
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struct timer_list tx_timer; /* HDLC transmit timeout timer */
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struct _synclinkmp_info *next_device; /* device list link */
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struct timer_list status_timer; /* input signal status check timer */
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spinlock_t lock; /* spinlock for synchronizing with ISR */
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struct work_struct task; /* task structure for scheduling bh */
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u32 max_frame_size; /* as set by device config */
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u32 pending_bh;
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bool bh_running; /* Protection from multiple */
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int isr_overflow;
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bool bh_requested;
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int dcd_chkcount; /* check counts to prevent */
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int cts_chkcount; /* too many IRQs if a signal */
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int dsr_chkcount; /* is floating */
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int ri_chkcount;
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char *buffer_list; /* virtual address of Rx & Tx buffer lists */
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unsigned long buffer_list_phys;
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unsigned int rx_buf_count; /* count of total allocated Rx buffers */
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SCADESC *rx_buf_list; /* list of receive buffer entries */
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SCADESC_EX rx_buf_list_ex[SCAMAXDESC]; /* list of receive buffer entries */
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unsigned int current_rx_buf;
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unsigned int tx_buf_count; /* count of total allocated Tx buffers */
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SCADESC *tx_buf_list; /* list of transmit buffer entries */
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SCADESC_EX tx_buf_list_ex[SCAMAXDESC]; /* list of transmit buffer entries */
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unsigned int last_tx_buf;
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unsigned char *tmp_rx_buf;
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unsigned int tmp_rx_buf_count;
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bool rx_enabled;
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bool rx_overflow;
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bool tx_enabled;
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bool tx_active;
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u32 idle_mode;
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unsigned char ie0_value;
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unsigned char ie1_value;
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unsigned char ie2_value;
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unsigned char ctrlreg_value;
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unsigned char old_signals;
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char device_name[25]; /* device instance name */
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int port_count;
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int adapter_num;
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int port_num;
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struct _synclinkmp_info *port_array[SCA_MAX_PORTS];
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unsigned int bus_type; /* expansion bus type (ISA,EISA,PCI) */
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unsigned int irq_level; /* interrupt level */
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unsigned long irq_flags;
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bool irq_requested; /* true if IRQ requested */
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MGSL_PARAMS params; /* communications parameters */
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unsigned char serial_signals; /* current serial signal states */
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bool irq_occurred; /* for diagnostics use */
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unsigned int init_error; /* Initialization startup error */
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u32 last_mem_alloc;
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unsigned char* memory_base; /* shared memory address (PCI only) */
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u32 phys_memory_base;
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int shared_mem_requested;
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unsigned char* sca_base; /* HD64570 SCA Memory address */
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u32 phys_sca_base;
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u32 sca_offset;
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bool sca_base_requested;
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unsigned char* lcr_base; /* local config registers (PCI only) */
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u32 phys_lcr_base;
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u32 lcr_offset;
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int lcr_mem_requested;
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unsigned char* statctrl_base; /* status/control register memory */
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u32 phys_statctrl_base;
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u32 statctrl_offset;
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bool sca_statctrl_requested;
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u32 misc_ctrl_value;
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char *flag_buf;
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bool drop_rts_on_tx_done;
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struct _input_signal_events input_signal_events;
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/* SPPP/Cisco HDLC device parts */
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int netcount;
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spinlock_t netlock;
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#if SYNCLINK_GENERIC_HDLC
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struct net_device *netdev;
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#endif
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} SLMP_INFO;
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#define MGSL_MAGIC 0x5401
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/*
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* define serial signal status change macros
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*/
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#define MISCSTATUS_DCD_LATCHED (SerialSignal_DCD<<8) /* indicates change in DCD */
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#define MISCSTATUS_RI_LATCHED (SerialSignal_RI<<8) /* indicates change in RI */
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#define MISCSTATUS_CTS_LATCHED (SerialSignal_CTS<<8) /* indicates change in CTS */
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#define MISCSTATUS_DSR_LATCHED (SerialSignal_DSR<<8) /* change in DSR */
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/* Common Register macros */
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#define LPR 0x00
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#define PABR0 0x02
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#define PABR1 0x03
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#define WCRL 0x04
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#define WCRM 0x05
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#define WCRH 0x06
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#define DPCR 0x08
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#define DMER 0x09
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#define ISR0 0x10
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#define ISR1 0x11
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#define ISR2 0x12
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#define IER0 0x14
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#define IER1 0x15
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#define IER2 0x16
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#define ITCR 0x18
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#define INTVR 0x1a
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#define IMVR 0x1c
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/* MSCI Register macros */
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#define TRB 0x20
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#define TRBL 0x20
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#define TRBH 0x21
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#define SR0 0x22
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#define SR1 0x23
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#define SR2 0x24
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#define SR3 0x25
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#define FST 0x26
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#define IE0 0x28
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#define IE1 0x29
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#define IE2 0x2a
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#define FIE 0x2b
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#define CMD 0x2c
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#define MD0 0x2e
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#define MD1 0x2f
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#define MD2 0x30
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#define CTL 0x31
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#define SA0 0x32
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#define SA1 0x33
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#define IDL 0x34
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#define TMC 0x35
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#define RXS 0x36
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#define TXS 0x37
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#define TRC0 0x38
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#define TRC1 0x39
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#define RRC 0x3a
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#define CST0 0x3c
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#define CST1 0x3d
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/* Timer Register Macros */
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#define TCNT 0x60
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#define TCNTL 0x60
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#define TCNTH 0x61
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#define TCONR 0x62
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#define TCONRL 0x62
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#define TCONRH 0x63
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#define TMCS 0x64
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#define TEPR 0x65
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/* DMA Controller Register macros */
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#define DARL 0x80
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#define DARH 0x81
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#define DARB 0x82
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#define BAR 0x80
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#define BARL 0x80
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#define BARH 0x81
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#define BARB 0x82
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#define SAR 0x84
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#define SARL 0x84
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#define SARH 0x85
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#define SARB 0x86
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#define CPB 0x86
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#define CDA 0x88
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#define CDAL 0x88
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#define CDAH 0x89
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#define EDA 0x8a
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#define EDAL 0x8a
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#define EDAH 0x8b
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#define BFL 0x8c
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#define BFLL 0x8c
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#define BFLH 0x8d
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#define BCR 0x8e
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#define BCRL 0x8e
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#define BCRH 0x8f
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#define DSR 0x90
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#define DMR 0x91
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#define FCT 0x93
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#define DIR 0x94
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#define DCMD 0x95
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/* combine with timer or DMA register address */
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#define TIMER0 0x00
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#define TIMER1 0x08
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#define TIMER2 0x10
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#define TIMER3 0x18
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#define RXDMA 0x00
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#define TXDMA 0x20
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/* SCA Command Codes */
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#define NOOP 0x00
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#define TXRESET 0x01
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#define TXENABLE 0x02
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#define TXDISABLE 0x03
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#define TXCRCINIT 0x04
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#define TXCRCEXCL 0x05
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#define TXEOM 0x06
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#define TXABORT 0x07
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#define MPON 0x08
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#define TXBUFCLR 0x09
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#define RXRESET 0x11
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#define RXENABLE 0x12
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#define RXDISABLE 0x13
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#define RXCRCINIT 0x14
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#define RXREJECT 0x15
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#define SEARCHMP 0x16
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#define RXCRCEXCL 0x17
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#define RXCRCCALC 0x18
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#define CHRESET 0x21
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#define HUNT 0x31
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/* DMA command codes */
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#define SWABORT 0x01
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#define FEICLEAR 0x02
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/* IE0 */
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#define TXINTE BIT7
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#define RXINTE BIT6
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#define TXRDYE BIT1
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#define RXRDYE BIT0
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/* IE1 & SR1 */
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#define UDRN BIT7
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#define IDLE BIT6
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#define SYNCD BIT4
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#define FLGD BIT4
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#define CCTS BIT3
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#define CDCD BIT2
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#define BRKD BIT1
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#define ABTD BIT1
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#define GAPD BIT1
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#define BRKE BIT0
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#define IDLD BIT0
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/* IE2 & SR2 */
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#define EOM BIT7
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#define PMP BIT6
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#define SHRT BIT6
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#define PE BIT5
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#define ABT BIT5
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#define FRME BIT4
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#define RBIT BIT4
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#define OVRN BIT3
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#define CRCE BIT2
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/*
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* Global linked list of SyncLink devices
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*/
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static SLMP_INFO *synclinkmp_device_list = NULL;
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static int synclinkmp_adapter_count = -1;
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static int synclinkmp_device_count = 0;
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/*
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* Set this param to non-zero to load eax with the
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* .text section address and breakpoint on module load.
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* This is useful for use with gdb and add-symbol-file command.
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*/
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static bool break_on_load = 0;
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/*
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* Driver major number, defaults to zero to get auto
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* assigned major number. May be forced as module parameter.
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*/
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static int ttymajor = 0;
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/*
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* Array of user specified options for ISA adapters.
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*/
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static int debug_level = 0;
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static int maxframe[MAX_DEVICES] = {0,};
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module_param(break_on_load, bool, 0);
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module_param(ttymajor, int, 0);
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module_param(debug_level, int, 0);
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module_param_array(maxframe, int, NULL, 0);
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static char *driver_name = "SyncLink MultiPort driver";
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static char *driver_version = "$Revision: 4.38 $";
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static int synclinkmp_init_one(struct pci_dev *dev,const struct pci_device_id *ent);
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static void synclinkmp_remove_one(struct pci_dev *dev);
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static const struct pci_device_id synclinkmp_pci_tbl[] = {
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{ PCI_VENDOR_ID_MICROGATE, PCI_DEVICE_ID_MICROGATE_SCA, PCI_ANY_ID, PCI_ANY_ID, },
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{ 0, }, /* terminate list */
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};
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MODULE_DEVICE_TABLE(pci, synclinkmp_pci_tbl);
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MODULE_LICENSE("GPL");
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static struct pci_driver synclinkmp_pci_driver = {
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.name = "synclinkmp",
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.id_table = synclinkmp_pci_tbl,
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.probe = synclinkmp_init_one,
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.remove = synclinkmp_remove_one,
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};
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static struct tty_driver *serial_driver;
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/* number of characters left in xmit buffer before we ask for more */
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#define WAKEUP_CHARS 256
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/* tty callbacks */
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static int open(struct tty_struct *tty, struct file * filp);
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static void close(struct tty_struct *tty, struct file * filp);
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static void hangup(struct tty_struct *tty);
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static void set_termios(struct tty_struct *tty, struct ktermios *old_termios);
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static int write(struct tty_struct *tty, const unsigned char *buf, int count);
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static int put_char(struct tty_struct *tty, unsigned char ch);
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static void send_xchar(struct tty_struct *tty, char ch);
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static void wait_until_sent(struct tty_struct *tty, int timeout);
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static int write_room(struct tty_struct *tty);
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static void flush_chars(struct tty_struct *tty);
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static void flush_buffer(struct tty_struct *tty);
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static void tx_hold(struct tty_struct *tty);
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static void tx_release(struct tty_struct *tty);
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static int ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg);
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static int chars_in_buffer(struct tty_struct *tty);
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static void throttle(struct tty_struct * tty);
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static void unthrottle(struct tty_struct * tty);
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static int set_break(struct tty_struct *tty, int break_state);
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#if SYNCLINK_GENERIC_HDLC
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#define dev_to_port(D) (dev_to_hdlc(D)->priv)
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static void hdlcdev_tx_done(SLMP_INFO *info);
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static void hdlcdev_rx(SLMP_INFO *info, char *buf, int size);
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static int hdlcdev_init(SLMP_INFO *info);
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static void hdlcdev_exit(SLMP_INFO *info);
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#endif
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/* ioctl handlers */
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static int get_stats(SLMP_INFO *info, struct mgsl_icount __user *user_icount);
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static int get_params(SLMP_INFO *info, MGSL_PARAMS __user *params);
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static int set_params(SLMP_INFO *info, MGSL_PARAMS __user *params);
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static int get_txidle(SLMP_INFO *info, int __user *idle_mode);
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static int set_txidle(SLMP_INFO *info, int idle_mode);
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static int tx_enable(SLMP_INFO *info, int enable);
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static int tx_abort(SLMP_INFO *info);
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static int rx_enable(SLMP_INFO *info, int enable);
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static int modem_input_wait(SLMP_INFO *info,int arg);
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static int wait_mgsl_event(SLMP_INFO *info, int __user *mask_ptr);
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static int tiocmget(struct tty_struct *tty);
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static int tiocmset(struct tty_struct *tty,
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unsigned int set, unsigned int clear);
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static int set_break(struct tty_struct *tty, int break_state);
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static int add_device(SLMP_INFO *info);
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static int device_init(int adapter_num, struct pci_dev *pdev);
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static int claim_resources(SLMP_INFO *info);
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static void release_resources(SLMP_INFO *info);
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static int startup(SLMP_INFO *info);
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static int block_til_ready(struct tty_struct *tty, struct file * filp,SLMP_INFO *info);
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static int carrier_raised(struct tty_port *port);
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static void shutdown(SLMP_INFO *info);
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static void program_hw(SLMP_INFO *info);
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static void change_params(SLMP_INFO *info);
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static bool init_adapter(SLMP_INFO *info);
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static bool register_test(SLMP_INFO *info);
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static bool irq_test(SLMP_INFO *info);
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static bool loopback_test(SLMP_INFO *info);
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static int adapter_test(SLMP_INFO *info);
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static bool memory_test(SLMP_INFO *info);
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static void reset_adapter(SLMP_INFO *info);
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static void reset_port(SLMP_INFO *info);
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static void async_mode(SLMP_INFO *info);
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static void hdlc_mode(SLMP_INFO *info);
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static void rx_stop(SLMP_INFO *info);
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static void rx_start(SLMP_INFO *info);
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static void rx_reset_buffers(SLMP_INFO *info);
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static void rx_free_frame_buffers(SLMP_INFO *info, unsigned int first, unsigned int last);
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static bool rx_get_frame(SLMP_INFO *info);
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static void tx_start(SLMP_INFO *info);
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static void tx_stop(SLMP_INFO *info);
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static void tx_load_fifo(SLMP_INFO *info);
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static void tx_set_idle(SLMP_INFO *info);
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static void tx_load_dma_buffer(SLMP_INFO *info, const char *buf, unsigned int count);
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static void get_signals(SLMP_INFO *info);
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static void set_signals(SLMP_INFO *info);
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static void enable_loopback(SLMP_INFO *info, int enable);
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static void set_rate(SLMP_INFO *info, u32 data_rate);
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static int bh_action(SLMP_INFO *info);
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static void bh_handler(struct work_struct *work);
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static void bh_receive(SLMP_INFO *info);
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static void bh_transmit(SLMP_INFO *info);
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static void bh_status(SLMP_INFO *info);
|
static void isr_timer(SLMP_INFO *info);
|
static void isr_rxint(SLMP_INFO *info);
|
static void isr_rxrdy(SLMP_INFO *info);
|
static void isr_txint(SLMP_INFO *info);
|
static void isr_txrdy(SLMP_INFO *info);
|
static void isr_rxdmaok(SLMP_INFO *info);
|
static void isr_rxdmaerror(SLMP_INFO *info);
|
static void isr_txdmaok(SLMP_INFO *info);
|
static void isr_txdmaerror(SLMP_INFO *info);
|
static void isr_io_pin(SLMP_INFO *info, u16 status);
|
|
static int alloc_dma_bufs(SLMP_INFO *info);
|
static void free_dma_bufs(SLMP_INFO *info);
|
static int alloc_buf_list(SLMP_INFO *info);
|
static int alloc_frame_bufs(SLMP_INFO *info, SCADESC *list, SCADESC_EX *list_ex,int count);
|
static int alloc_tmp_rx_buf(SLMP_INFO *info);
|
static void free_tmp_rx_buf(SLMP_INFO *info);
|
|
static void load_pci_memory(SLMP_INFO *info, char* dest, const char* src, unsigned short count);
|
static void trace_block(SLMP_INFO *info, const char* data, int count, int xmit);
|
static void tx_timeout(struct timer_list *t);
|
static void status_timeout(struct timer_list *t);
|
|
static unsigned char read_reg(SLMP_INFO *info, unsigned char addr);
|
static void write_reg(SLMP_INFO *info, unsigned char addr, unsigned char val);
|
static u16 read_reg16(SLMP_INFO *info, unsigned char addr);
|
static void write_reg16(SLMP_INFO *info, unsigned char addr, u16 val);
|
static unsigned char read_status_reg(SLMP_INFO * info);
|
static void write_control_reg(SLMP_INFO * info);
|
|
|
static unsigned char rx_active_fifo_level = 16; // rx request FIFO activation level in bytes
|
static unsigned char tx_active_fifo_level = 16; // tx request FIFO activation level in bytes
|
static unsigned char tx_negate_fifo_level = 32; // tx request FIFO negation level in bytes
|
|
static u32 misc_ctrl_value = 0x007e4040;
|
static u32 lcr1_brdr_value = 0x00800028;
|
|
static u32 read_ahead_count = 8;
|
|
/* DPCR, DMA Priority Control
|
*
|
* 07..05 Not used, must be 0
|
* 04 BRC, bus release condition: 0=all transfers complete
|
* 1=release after 1 xfer on all channels
|
* 03 CCC, channel change condition: 0=every cycle
|
* 1=after each channel completes all xfers
|
* 02..00 PR<2..0>, priority 100=round robin
|
*
|
* 00000100 = 0x00
|
*/
|
static unsigned char dma_priority = 0x04;
|
|
// Number of bytes that can be written to shared RAM
|
// in a single write operation
|
static u32 sca_pci_load_interval = 64;
|
|
/*
|
* 1st function defined in .text section. Calling this function in
|
* init_module() followed by a breakpoint allows a remote debugger
|
* (gdb) to get the .text address for the add-symbol-file command.
|
* This allows remote debugging of dynamically loadable modules.
|
*/
|
static void* synclinkmp_get_text_ptr(void);
|
static void* synclinkmp_get_text_ptr(void) {return synclinkmp_get_text_ptr;}
|
|
static inline int sanity_check(SLMP_INFO *info,
|
char *name, const char *routine)
|
{
|
#ifdef SANITY_CHECK
|
static const char *badmagic =
|
"Warning: bad magic number for synclinkmp_struct (%s) in %s\n";
|
static const char *badinfo =
|
"Warning: null synclinkmp_struct for (%s) in %s\n";
|
|
if (!info) {
|
printk(badinfo, name, routine);
|
return 1;
|
}
|
if (info->magic != MGSL_MAGIC) {
|
printk(badmagic, name, routine);
|
return 1;
|
}
|
#else
|
if (!info)
|
return 1;
|
#endif
|
return 0;
|
}
|
|
/*
|
* line discipline callback wrappers
|
*
|
* The wrappers maintain line discipline references
|
* while calling into the line discipline.
|
*
|
* ldisc_receive_buf - pass receive data to line discipline
|
*/
|
|
static void ldisc_receive_buf(struct tty_struct *tty,
|
const __u8 *data, char *flags, int count)
|
{
|
struct tty_ldisc *ld;
|
if (!tty)
|
return;
|
ld = tty_ldisc_ref(tty);
|
if (ld) {
|
if (ld->ops->receive_buf)
|
ld->ops->receive_buf(tty, data, flags, count);
|
tty_ldisc_deref(ld);
|
}
|
}
|
|
/* tty callbacks */
|
|
static int install(struct tty_driver *driver, struct tty_struct *tty)
|
{
|
SLMP_INFO *info;
|
int line = tty->index;
|
|
if (line >= synclinkmp_device_count) {
|
printk("%s(%d): open with invalid line #%d.\n",
|
__FILE__,__LINE__,line);
|
return -ENODEV;
|
}
|
|
info = synclinkmp_device_list;
|
while (info && info->line != line)
|
info = info->next_device;
|
if (sanity_check(info, tty->name, "open"))
|
return -ENODEV;
|
if (info->init_error) {
|
printk("%s(%d):%s device is not allocated, init error=%d\n",
|
__FILE__, __LINE__, info->device_name,
|
info->init_error);
|
return -ENODEV;
|
}
|
|
tty->driver_data = info;
|
|
return tty_port_install(&info->port, driver, tty);
|
}
|
|
/* Called when a port is opened. Init and enable port.
|
*/
|
static int open(struct tty_struct *tty, struct file *filp)
|
{
|
SLMP_INFO *info = tty->driver_data;
|
unsigned long flags;
|
int retval;
|
|
info->port.tty = tty;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s open(), old ref count = %d\n",
|
__FILE__,__LINE__,tty->driver->name, info->port.count);
|
|
info->port.low_latency = (info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0;
|
|
spin_lock_irqsave(&info->netlock, flags);
|
if (info->netcount) {
|
retval = -EBUSY;
|
spin_unlock_irqrestore(&info->netlock, flags);
|
goto cleanup;
|
}
|
info->port.count++;
|
spin_unlock_irqrestore(&info->netlock, flags);
|
|
if (info->port.count == 1) {
|
/* 1st open on this device, init hardware */
|
retval = startup(info);
|
if (retval < 0)
|
goto cleanup;
|
}
|
|
retval = block_til_ready(tty, filp, info);
|
if (retval) {
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s block_til_ready() returned %d\n",
|
__FILE__,__LINE__, info->device_name, retval);
|
goto cleanup;
|
}
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s open() success\n",
|
__FILE__,__LINE__, info->device_name);
|
retval = 0;
|
|
cleanup:
|
if (retval) {
|
if (tty->count == 1)
|
info->port.tty = NULL; /* tty layer will release tty struct */
|
if(info->port.count)
|
info->port.count--;
|
}
|
|
return retval;
|
}
|
|
/* Called when port is closed. Wait for remaining data to be
|
* sent. Disable port and free resources.
|
*/
|
static void close(struct tty_struct *tty, struct file *filp)
|
{
|
SLMP_INFO * info = tty->driver_data;
|
|
if (sanity_check(info, tty->name, "close"))
|
return;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s close() entry, count=%d\n",
|
__FILE__,__LINE__, info->device_name, info->port.count);
|
|
if (tty_port_close_start(&info->port, tty, filp) == 0)
|
goto cleanup;
|
|
mutex_lock(&info->port.mutex);
|
if (tty_port_initialized(&info->port))
|
wait_until_sent(tty, info->timeout);
|
|
flush_buffer(tty);
|
tty_ldisc_flush(tty);
|
shutdown(info);
|
mutex_unlock(&info->port.mutex);
|
|
tty_port_close_end(&info->port, tty);
|
info->port.tty = NULL;
|
cleanup:
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s close() exit, count=%d\n", __FILE__,__LINE__,
|
tty->driver->name, info->port.count);
|
}
|
|
/* Called by tty_hangup() when a hangup is signaled.
|
* This is the same as closing all open descriptors for the port.
|
*/
|
static void hangup(struct tty_struct *tty)
|
{
|
SLMP_INFO *info = tty->driver_data;
|
unsigned long flags;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s hangup()\n",
|
__FILE__,__LINE__, info->device_name );
|
|
if (sanity_check(info, tty->name, "hangup"))
|
return;
|
|
mutex_lock(&info->port.mutex);
|
flush_buffer(tty);
|
shutdown(info);
|
|
spin_lock_irqsave(&info->port.lock, flags);
|
info->port.count = 0;
|
info->port.tty = NULL;
|
spin_unlock_irqrestore(&info->port.lock, flags);
|
tty_port_set_active(&info->port, 1);
|
mutex_unlock(&info->port.mutex);
|
|
wake_up_interruptible(&info->port.open_wait);
|
}
|
|
/* Set new termios settings
|
*/
|
static void set_termios(struct tty_struct *tty, struct ktermios *old_termios)
|
{
|
SLMP_INFO *info = tty->driver_data;
|
unsigned long flags;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s set_termios()\n", __FILE__,__LINE__,
|
tty->driver->name );
|
|
change_params(info);
|
|
/* Handle transition to B0 status */
|
if ((old_termios->c_cflag & CBAUD) && !C_BAUD(tty)) {
|
info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
|
spin_lock_irqsave(&info->lock,flags);
|
set_signals(info);
|
spin_unlock_irqrestore(&info->lock,flags);
|
}
|
|
/* Handle transition away from B0 status */
|
if (!(old_termios->c_cflag & CBAUD) && C_BAUD(tty)) {
|
info->serial_signals |= SerialSignal_DTR;
|
if (!C_CRTSCTS(tty) || !tty_throttled(tty))
|
info->serial_signals |= SerialSignal_RTS;
|
spin_lock_irqsave(&info->lock,flags);
|
set_signals(info);
|
spin_unlock_irqrestore(&info->lock,flags);
|
}
|
|
/* Handle turning off CRTSCTS */
|
if (old_termios->c_cflag & CRTSCTS && !C_CRTSCTS(tty)) {
|
tty->hw_stopped = 0;
|
tx_release(tty);
|
}
|
}
|
|
/* Send a block of data
|
*
|
* Arguments:
|
*
|
* tty pointer to tty information structure
|
* buf pointer to buffer containing send data
|
* count size of send data in bytes
|
*
|
* Return Value: number of characters written
|
*/
|
static int write(struct tty_struct *tty,
|
const unsigned char *buf, int count)
|
{
|
int c, ret = 0;
|
SLMP_INFO *info = tty->driver_data;
|
unsigned long flags;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s write() count=%d\n",
|
__FILE__,__LINE__,info->device_name,count);
|
|
if (sanity_check(info, tty->name, "write"))
|
goto cleanup;
|
|
if (!info->tx_buf)
|
goto cleanup;
|
|
if (info->params.mode == MGSL_MODE_HDLC) {
|
if (count > info->max_frame_size) {
|
ret = -EIO;
|
goto cleanup;
|
}
|
if (info->tx_active)
|
goto cleanup;
|
if (info->tx_count) {
|
/* send accumulated data from send_char() calls */
|
/* as frame and wait before accepting more data. */
|
tx_load_dma_buffer(info, info->tx_buf, info->tx_count);
|
goto start;
|
}
|
ret = info->tx_count = count;
|
tx_load_dma_buffer(info, buf, count);
|
goto start;
|
}
|
|
for (;;) {
|
c = min_t(int, count,
|
min(info->max_frame_size - info->tx_count - 1,
|
info->max_frame_size - info->tx_put));
|
if (c <= 0)
|
break;
|
|
memcpy(info->tx_buf + info->tx_put, buf, c);
|
|
spin_lock_irqsave(&info->lock,flags);
|
info->tx_put += c;
|
if (info->tx_put >= info->max_frame_size)
|
info->tx_put -= info->max_frame_size;
|
info->tx_count += c;
|
spin_unlock_irqrestore(&info->lock,flags);
|
|
buf += c;
|
count -= c;
|
ret += c;
|
}
|
|
if (info->params.mode == MGSL_MODE_HDLC) {
|
if (count) {
|
ret = info->tx_count = 0;
|
goto cleanup;
|
}
|
tx_load_dma_buffer(info, info->tx_buf, info->tx_count);
|
}
|
start:
|
if (info->tx_count && !tty->stopped && !tty->hw_stopped) {
|
spin_lock_irqsave(&info->lock,flags);
|
if (!info->tx_active)
|
tx_start(info);
|
spin_unlock_irqrestore(&info->lock,flags);
|
}
|
|
cleanup:
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk( "%s(%d):%s write() returning=%d\n",
|
__FILE__,__LINE__,info->device_name,ret);
|
return ret;
|
}
|
|
/* Add a character to the transmit buffer.
|
*/
|
static int put_char(struct tty_struct *tty, unsigned char ch)
|
{
|
SLMP_INFO *info = tty->driver_data;
|
unsigned long flags;
|
int ret = 0;
|
|
if ( debug_level >= DEBUG_LEVEL_INFO ) {
|
printk( "%s(%d):%s put_char(%d)\n",
|
__FILE__,__LINE__,info->device_name,ch);
|
}
|
|
if (sanity_check(info, tty->name, "put_char"))
|
return 0;
|
|
if (!info->tx_buf)
|
return 0;
|
|
spin_lock_irqsave(&info->lock,flags);
|
|
if ( (info->params.mode != MGSL_MODE_HDLC) ||
|
!info->tx_active ) {
|
|
if (info->tx_count < info->max_frame_size - 1) {
|
info->tx_buf[info->tx_put++] = ch;
|
if (info->tx_put >= info->max_frame_size)
|
info->tx_put -= info->max_frame_size;
|
info->tx_count++;
|
ret = 1;
|
}
|
}
|
|
spin_unlock_irqrestore(&info->lock,flags);
|
return ret;
|
}
|
|
/* Send a high-priority XON/XOFF character
|
*/
|
static void send_xchar(struct tty_struct *tty, char ch)
|
{
|
SLMP_INFO *info = tty->driver_data;
|
unsigned long flags;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s send_xchar(%d)\n",
|
__FILE__,__LINE__, info->device_name, ch );
|
|
if (sanity_check(info, tty->name, "send_xchar"))
|
return;
|
|
info->x_char = ch;
|
if (ch) {
|
/* Make sure transmit interrupts are on */
|
spin_lock_irqsave(&info->lock,flags);
|
if (!info->tx_enabled)
|
tx_start(info);
|
spin_unlock_irqrestore(&info->lock,flags);
|
}
|
}
|
|
/* Wait until the transmitter is empty.
|
*/
|
static void wait_until_sent(struct tty_struct *tty, int timeout)
|
{
|
SLMP_INFO * info = tty->driver_data;
|
unsigned long orig_jiffies, char_time;
|
|
if (!info )
|
return;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s wait_until_sent() entry\n",
|
__FILE__,__LINE__, info->device_name );
|
|
if (sanity_check(info, tty->name, "wait_until_sent"))
|
return;
|
|
if (!tty_port_initialized(&info->port))
|
goto exit;
|
|
orig_jiffies = jiffies;
|
|
/* Set check interval to 1/5 of estimated time to
|
* send a character, and make it at least 1. The check
|
* interval should also be less than the timeout.
|
* Note: use tight timings here to satisfy the NIST-PCTS.
|
*/
|
|
if ( info->params.data_rate ) {
|
char_time = info->timeout/(32 * 5);
|
if (!char_time)
|
char_time++;
|
} else
|
char_time = 1;
|
|
if (timeout)
|
char_time = min_t(unsigned long, char_time, timeout);
|
|
if ( info->params.mode == MGSL_MODE_HDLC ) {
|
while (info->tx_active) {
|
msleep_interruptible(jiffies_to_msecs(char_time));
|
if (signal_pending(current))
|
break;
|
if (timeout && time_after(jiffies, orig_jiffies + timeout))
|
break;
|
}
|
} else {
|
/*
|
* TODO: determine if there is something similar to USC16C32
|
* TXSTATUS_ALL_SENT status
|
*/
|
while ( info->tx_active && info->tx_enabled) {
|
msleep_interruptible(jiffies_to_msecs(char_time));
|
if (signal_pending(current))
|
break;
|
if (timeout && time_after(jiffies, orig_jiffies + timeout))
|
break;
|
}
|
}
|
|
exit:
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s wait_until_sent() exit\n",
|
__FILE__,__LINE__, info->device_name );
|
}
|
|
/* Return the count of free bytes in transmit buffer
|
*/
|
static int write_room(struct tty_struct *tty)
|
{
|
SLMP_INFO *info = tty->driver_data;
|
int ret;
|
|
if (sanity_check(info, tty->name, "write_room"))
|
return 0;
|
|
if (info->params.mode == MGSL_MODE_HDLC) {
|
ret = (info->tx_active) ? 0 : HDLC_MAX_FRAME_SIZE;
|
} else {
|
ret = info->max_frame_size - info->tx_count - 1;
|
if (ret < 0)
|
ret = 0;
|
}
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s write_room()=%d\n",
|
__FILE__, __LINE__, info->device_name, ret);
|
|
return ret;
|
}
|
|
/* enable transmitter and send remaining buffered characters
|
*/
|
static void flush_chars(struct tty_struct *tty)
|
{
|
SLMP_INFO *info = tty->driver_data;
|
unsigned long flags;
|
|
if ( debug_level >= DEBUG_LEVEL_INFO )
|
printk( "%s(%d):%s flush_chars() entry tx_count=%d\n",
|
__FILE__,__LINE__,info->device_name,info->tx_count);
|
|
if (sanity_check(info, tty->name, "flush_chars"))
|
return;
|
|
if (info->tx_count <= 0 || tty->stopped || tty->hw_stopped ||
|
!info->tx_buf)
|
return;
|
|
if ( debug_level >= DEBUG_LEVEL_INFO )
|
printk( "%s(%d):%s flush_chars() entry, starting transmitter\n",
|
__FILE__,__LINE__,info->device_name );
|
|
spin_lock_irqsave(&info->lock,flags);
|
|
if (!info->tx_active) {
|
if ( (info->params.mode == MGSL_MODE_HDLC) &&
|
info->tx_count ) {
|
/* operating in synchronous (frame oriented) mode */
|
/* copy data from circular tx_buf to */
|
/* transmit DMA buffer. */
|
tx_load_dma_buffer(info,
|
info->tx_buf,info->tx_count);
|
}
|
tx_start(info);
|
}
|
|
spin_unlock_irqrestore(&info->lock,flags);
|
}
|
|
/* Discard all data in the send buffer
|
*/
|
static void flush_buffer(struct tty_struct *tty)
|
{
|
SLMP_INFO *info = tty->driver_data;
|
unsigned long flags;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s flush_buffer() entry\n",
|
__FILE__,__LINE__, info->device_name );
|
|
if (sanity_check(info, tty->name, "flush_buffer"))
|
return;
|
|
spin_lock_irqsave(&info->lock,flags);
|
info->tx_count = info->tx_put = info->tx_get = 0;
|
del_timer(&info->tx_timer);
|
spin_unlock_irqrestore(&info->lock,flags);
|
|
tty_wakeup(tty);
|
}
|
|
/* throttle (stop) transmitter
|
*/
|
static void tx_hold(struct tty_struct *tty)
|
{
|
SLMP_INFO *info = tty->driver_data;
|
unsigned long flags;
|
|
if (sanity_check(info, tty->name, "tx_hold"))
|
return;
|
|
if ( debug_level >= DEBUG_LEVEL_INFO )
|
printk("%s(%d):%s tx_hold()\n",
|
__FILE__,__LINE__,info->device_name);
|
|
spin_lock_irqsave(&info->lock,flags);
|
if (info->tx_enabled)
|
tx_stop(info);
|
spin_unlock_irqrestore(&info->lock,flags);
|
}
|
|
/* release (start) transmitter
|
*/
|
static void tx_release(struct tty_struct *tty)
|
{
|
SLMP_INFO *info = tty->driver_data;
|
unsigned long flags;
|
|
if (sanity_check(info, tty->name, "tx_release"))
|
return;
|
|
if ( debug_level >= DEBUG_LEVEL_INFO )
|
printk("%s(%d):%s tx_release()\n",
|
__FILE__,__LINE__,info->device_name);
|
|
spin_lock_irqsave(&info->lock,flags);
|
if (!info->tx_enabled)
|
tx_start(info);
|
spin_unlock_irqrestore(&info->lock,flags);
|
}
|
|
/* Service an IOCTL request
|
*
|
* Arguments:
|
*
|
* tty pointer to tty instance data
|
* cmd IOCTL command code
|
* arg command argument/context
|
*
|
* Return Value: 0 if success, otherwise error code
|
*/
|
static int ioctl(struct tty_struct *tty,
|
unsigned int cmd, unsigned long arg)
|
{
|
SLMP_INFO *info = tty->driver_data;
|
void __user *argp = (void __user *)arg;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s ioctl() cmd=%08X\n", __FILE__,__LINE__,
|
info->device_name, cmd );
|
|
if (sanity_check(info, tty->name, "ioctl"))
|
return -ENODEV;
|
|
if (cmd != TIOCMIWAIT) {
|
if (tty_io_error(tty))
|
return -EIO;
|
}
|
|
switch (cmd) {
|
case MGSL_IOCGPARAMS:
|
return get_params(info, argp);
|
case MGSL_IOCSPARAMS:
|
return set_params(info, argp);
|
case MGSL_IOCGTXIDLE:
|
return get_txidle(info, argp);
|
case MGSL_IOCSTXIDLE:
|
return set_txidle(info, (int)arg);
|
case MGSL_IOCTXENABLE:
|
return tx_enable(info, (int)arg);
|
case MGSL_IOCRXENABLE:
|
return rx_enable(info, (int)arg);
|
case MGSL_IOCTXABORT:
|
return tx_abort(info);
|
case MGSL_IOCGSTATS:
|
return get_stats(info, argp);
|
case MGSL_IOCWAITEVENT:
|
return wait_mgsl_event(info, argp);
|
case MGSL_IOCLOOPTXDONE:
|
return 0; // TODO: Not supported, need to document
|
/* Wait for modem input (DCD,RI,DSR,CTS) change
|
* as specified by mask in arg (TIOCM_RNG/DSR/CD/CTS)
|
*/
|
case TIOCMIWAIT:
|
return modem_input_wait(info,(int)arg);
|
|
/*
|
* Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
|
* Return: write counters to the user passed counter struct
|
* NB: both 1->0 and 0->1 transitions are counted except for
|
* RI where only 0->1 is counted.
|
*/
|
default:
|
return -ENOIOCTLCMD;
|
}
|
return 0;
|
}
|
|
static int get_icount(struct tty_struct *tty,
|
struct serial_icounter_struct *icount)
|
{
|
SLMP_INFO *info = tty->driver_data;
|
struct mgsl_icount cnow; /* kernel counter temps */
|
unsigned long flags;
|
|
spin_lock_irqsave(&info->lock,flags);
|
cnow = info->icount;
|
spin_unlock_irqrestore(&info->lock,flags);
|
|
icount->cts = cnow.cts;
|
icount->dsr = cnow.dsr;
|
icount->rng = cnow.rng;
|
icount->dcd = cnow.dcd;
|
icount->rx = cnow.rx;
|
icount->tx = cnow.tx;
|
icount->frame = cnow.frame;
|
icount->overrun = cnow.overrun;
|
icount->parity = cnow.parity;
|
icount->brk = cnow.brk;
|
icount->buf_overrun = cnow.buf_overrun;
|
|
return 0;
|
}
|
|
/*
|
* /proc fs routines....
|
*/
|
|
static inline void line_info(struct seq_file *m, SLMP_INFO *info)
|
{
|
char stat_buf[30];
|
unsigned long flags;
|
|
seq_printf(m, "%s: SCABase=%08x Mem=%08X StatusControl=%08x LCR=%08X\n"
|
"\tIRQ=%d MaxFrameSize=%u\n",
|
info->device_name,
|
info->phys_sca_base,
|
info->phys_memory_base,
|
info->phys_statctrl_base,
|
info->phys_lcr_base,
|
info->irq_level,
|
info->max_frame_size );
|
|
/* output current serial signal states */
|
spin_lock_irqsave(&info->lock,flags);
|
get_signals(info);
|
spin_unlock_irqrestore(&info->lock,flags);
|
|
stat_buf[0] = 0;
|
stat_buf[1] = 0;
|
if (info->serial_signals & SerialSignal_RTS)
|
strcat(stat_buf, "|RTS");
|
if (info->serial_signals & SerialSignal_CTS)
|
strcat(stat_buf, "|CTS");
|
if (info->serial_signals & SerialSignal_DTR)
|
strcat(stat_buf, "|DTR");
|
if (info->serial_signals & SerialSignal_DSR)
|
strcat(stat_buf, "|DSR");
|
if (info->serial_signals & SerialSignal_DCD)
|
strcat(stat_buf, "|CD");
|
if (info->serial_signals & SerialSignal_RI)
|
strcat(stat_buf, "|RI");
|
|
if (info->params.mode == MGSL_MODE_HDLC) {
|
seq_printf(m, "\tHDLC txok:%d rxok:%d",
|
info->icount.txok, info->icount.rxok);
|
if (info->icount.txunder)
|
seq_printf(m, " txunder:%d", info->icount.txunder);
|
if (info->icount.txabort)
|
seq_printf(m, " txabort:%d", info->icount.txabort);
|
if (info->icount.rxshort)
|
seq_printf(m, " rxshort:%d", info->icount.rxshort);
|
if (info->icount.rxlong)
|
seq_printf(m, " rxlong:%d", info->icount.rxlong);
|
if (info->icount.rxover)
|
seq_printf(m, " rxover:%d", info->icount.rxover);
|
if (info->icount.rxcrc)
|
seq_printf(m, " rxlong:%d", info->icount.rxcrc);
|
} else {
|
seq_printf(m, "\tASYNC tx:%d rx:%d",
|
info->icount.tx, info->icount.rx);
|
if (info->icount.frame)
|
seq_printf(m, " fe:%d", info->icount.frame);
|
if (info->icount.parity)
|
seq_printf(m, " pe:%d", info->icount.parity);
|
if (info->icount.brk)
|
seq_printf(m, " brk:%d", info->icount.brk);
|
if (info->icount.overrun)
|
seq_printf(m, " oe:%d", info->icount.overrun);
|
}
|
|
/* Append serial signal status to end */
|
seq_printf(m, " %s\n", stat_buf+1);
|
|
seq_printf(m, "\ttxactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
|
info->tx_active,info->bh_requested,info->bh_running,
|
info->pending_bh);
|
}
|
|
/* Called to print information about devices
|
*/
|
static int synclinkmp_proc_show(struct seq_file *m, void *v)
|
{
|
SLMP_INFO *info;
|
|
seq_printf(m, "synclinkmp driver:%s\n", driver_version);
|
|
info = synclinkmp_device_list;
|
while( info ) {
|
line_info(m, info);
|
info = info->next_device;
|
}
|
return 0;
|
}
|
|
/* Return the count of bytes in transmit buffer
|
*/
|
static int chars_in_buffer(struct tty_struct *tty)
|
{
|
SLMP_INFO *info = tty->driver_data;
|
|
if (sanity_check(info, tty->name, "chars_in_buffer"))
|
return 0;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s chars_in_buffer()=%d\n",
|
__FILE__, __LINE__, info->device_name, info->tx_count);
|
|
return info->tx_count;
|
}
|
|
/* Signal remote device to throttle send data (our receive data)
|
*/
|
static void throttle(struct tty_struct * tty)
|
{
|
SLMP_INFO *info = tty->driver_data;
|
unsigned long flags;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s throttle() entry\n",
|
__FILE__,__LINE__, info->device_name );
|
|
if (sanity_check(info, tty->name, "throttle"))
|
return;
|
|
if (I_IXOFF(tty))
|
send_xchar(tty, STOP_CHAR(tty));
|
|
if (C_CRTSCTS(tty)) {
|
spin_lock_irqsave(&info->lock,flags);
|
info->serial_signals &= ~SerialSignal_RTS;
|
set_signals(info);
|
spin_unlock_irqrestore(&info->lock,flags);
|
}
|
}
|
|
/* Signal remote device to stop throttling send data (our receive data)
|
*/
|
static void unthrottle(struct tty_struct * tty)
|
{
|
SLMP_INFO *info = tty->driver_data;
|
unsigned long flags;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s unthrottle() entry\n",
|
__FILE__,__LINE__, info->device_name );
|
|
if (sanity_check(info, tty->name, "unthrottle"))
|
return;
|
|
if (I_IXOFF(tty)) {
|
if (info->x_char)
|
info->x_char = 0;
|
else
|
send_xchar(tty, START_CHAR(tty));
|
}
|
|
if (C_CRTSCTS(tty)) {
|
spin_lock_irqsave(&info->lock,flags);
|
info->serial_signals |= SerialSignal_RTS;
|
set_signals(info);
|
spin_unlock_irqrestore(&info->lock,flags);
|
}
|
}
|
|
/* set or clear transmit break condition
|
* break_state -1=set break condition, 0=clear
|
*/
|
static int set_break(struct tty_struct *tty, int break_state)
|
{
|
unsigned char RegValue;
|
SLMP_INFO * info = tty->driver_data;
|
unsigned long flags;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s set_break(%d)\n",
|
__FILE__,__LINE__, info->device_name, break_state);
|
|
if (sanity_check(info, tty->name, "set_break"))
|
return -EINVAL;
|
|
spin_lock_irqsave(&info->lock,flags);
|
RegValue = read_reg(info, CTL);
|
if (break_state == -1)
|
RegValue |= BIT3;
|
else
|
RegValue &= ~BIT3;
|
write_reg(info, CTL, RegValue);
|
spin_unlock_irqrestore(&info->lock,flags);
|
return 0;
|
}
|
|
#if SYNCLINK_GENERIC_HDLC
|
|
/**
|
* hdlcdev_attach - called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
|
* @dev: pointer to network device structure
|
* @encoding: serial encoding setting
|
* @parity: FCS setting
|
*
|
* Set encoding and frame check sequence (FCS) options.
|
*
|
* Return: 0 if success, otherwise error code
|
*/
|
static int hdlcdev_attach(struct net_device *dev, unsigned short encoding,
|
unsigned short parity)
|
{
|
SLMP_INFO *info = dev_to_port(dev);
|
unsigned char new_encoding;
|
unsigned short new_crctype;
|
|
/* return error if TTY interface open */
|
if (info->port.count)
|
return -EBUSY;
|
|
switch (encoding)
|
{
|
case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break;
|
case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break;
|
case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break;
|
case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break;
|
case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break;
|
default: return -EINVAL;
|
}
|
|
switch (parity)
|
{
|
case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break;
|
case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break;
|
case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break;
|
default: return -EINVAL;
|
}
|
|
info->params.encoding = new_encoding;
|
info->params.crc_type = new_crctype;
|
|
/* if network interface up, reprogram hardware */
|
if (info->netcount)
|
program_hw(info);
|
|
return 0;
|
}
|
|
/**
|
* hdlcdev_xmit - called by generic HDLC layer to send frame
|
* @skb: socket buffer containing HDLC frame
|
* @dev: pointer to network device structure
|
*/
|
static netdev_tx_t hdlcdev_xmit(struct sk_buff *skb,
|
struct net_device *dev)
|
{
|
SLMP_INFO *info = dev_to_port(dev);
|
unsigned long flags;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk(KERN_INFO "%s:hdlc_xmit(%s)\n",__FILE__,dev->name);
|
|
/* stop sending until this frame completes */
|
netif_stop_queue(dev);
|
|
/* copy data to device buffers */
|
info->tx_count = skb->len;
|
tx_load_dma_buffer(info, skb->data, skb->len);
|
|
/* update network statistics */
|
dev->stats.tx_packets++;
|
dev->stats.tx_bytes += skb->len;
|
|
/* done with socket buffer, so free it */
|
dev_kfree_skb(skb);
|
|
/* save start time for transmit timeout detection */
|
netif_trans_update(dev);
|
|
/* start hardware transmitter if necessary */
|
spin_lock_irqsave(&info->lock,flags);
|
if (!info->tx_active)
|
tx_start(info);
|
spin_unlock_irqrestore(&info->lock,flags);
|
|
return NETDEV_TX_OK;
|
}
|
|
/**
|
* hdlcdev_open - called by network layer when interface enabled
|
* @dev: pointer to network device structure
|
*
|
* Claim resources and initialize hardware.
|
*
|
* Return: 0 if success, otherwise error code
|
*/
|
static int hdlcdev_open(struct net_device *dev)
|
{
|
SLMP_INFO *info = dev_to_port(dev);
|
int rc;
|
unsigned long flags;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s:hdlcdev_open(%s)\n",__FILE__,dev->name);
|
|
/* generic HDLC layer open processing */
|
rc = hdlc_open(dev);
|
if (rc)
|
return rc;
|
|
/* arbitrate between network and tty opens */
|
spin_lock_irqsave(&info->netlock, flags);
|
if (info->port.count != 0 || info->netcount != 0) {
|
printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name);
|
spin_unlock_irqrestore(&info->netlock, flags);
|
return -EBUSY;
|
}
|
info->netcount=1;
|
spin_unlock_irqrestore(&info->netlock, flags);
|
|
/* claim resources and init adapter */
|
if ((rc = startup(info)) != 0) {
|
spin_lock_irqsave(&info->netlock, flags);
|
info->netcount=0;
|
spin_unlock_irqrestore(&info->netlock, flags);
|
return rc;
|
}
|
|
/* assert RTS and DTR, apply hardware settings */
|
info->serial_signals |= SerialSignal_RTS | SerialSignal_DTR;
|
program_hw(info);
|
|
/* enable network layer transmit */
|
netif_trans_update(dev);
|
netif_start_queue(dev);
|
|
/* inform generic HDLC layer of current DCD status */
|
spin_lock_irqsave(&info->lock, flags);
|
get_signals(info);
|
spin_unlock_irqrestore(&info->lock, flags);
|
if (info->serial_signals & SerialSignal_DCD)
|
netif_carrier_on(dev);
|
else
|
netif_carrier_off(dev);
|
return 0;
|
}
|
|
/**
|
* hdlcdev_close - called by network layer when interface is disabled
|
* @dev: pointer to network device structure
|
*
|
* Shutdown hardware and release resources.
|
*
|
* Return: 0 if success, otherwise error code
|
*/
|
static int hdlcdev_close(struct net_device *dev)
|
{
|
SLMP_INFO *info = dev_to_port(dev);
|
unsigned long flags;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s:hdlcdev_close(%s)\n",__FILE__,dev->name);
|
|
netif_stop_queue(dev);
|
|
/* shutdown adapter and release resources */
|
shutdown(info);
|
|
hdlc_close(dev);
|
|
spin_lock_irqsave(&info->netlock, flags);
|
info->netcount=0;
|
spin_unlock_irqrestore(&info->netlock, flags);
|
|
return 0;
|
}
|
|
/**
|
* hdlcdev_ioctl - called by network layer to process IOCTL call to network device
|
* @dev: pointer to network device structure
|
* @ifr: pointer to network interface request structure
|
* @cmd: IOCTL command code
|
*
|
* Return: 0 if success, otherwise error code
|
*/
|
static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
|
{
|
const size_t size = sizeof(sync_serial_settings);
|
sync_serial_settings new_line;
|
sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync;
|
SLMP_INFO *info = dev_to_port(dev);
|
unsigned int flags;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name);
|
|
/* return error if TTY interface open */
|
if (info->port.count)
|
return -EBUSY;
|
|
if (cmd != SIOCWANDEV)
|
return hdlc_ioctl(dev, ifr, cmd);
|
|
switch(ifr->ifr_settings.type) {
|
case IF_GET_IFACE: /* return current sync_serial_settings */
|
|
ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL;
|
if (ifr->ifr_settings.size < size) {
|
ifr->ifr_settings.size = size; /* data size wanted */
|
return -ENOBUFS;
|
}
|
|
flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
|
HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
|
HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
|
HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
|
|
memset(&new_line, 0, sizeof(new_line));
|
switch (flags){
|
case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break;
|
case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break;
|
case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break;
|
case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break;
|
default: new_line.clock_type = CLOCK_DEFAULT;
|
}
|
|
new_line.clock_rate = info->params.clock_speed;
|
new_line.loopback = info->params.loopback ? 1:0;
|
|
if (copy_to_user(line, &new_line, size))
|
return -EFAULT;
|
return 0;
|
|
case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */
|
|
if(!capable(CAP_NET_ADMIN))
|
return -EPERM;
|
if (copy_from_user(&new_line, line, size))
|
return -EFAULT;
|
|
switch (new_line.clock_type)
|
{
|
case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break;
|
case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break;
|
case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break;
|
case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break;
|
case CLOCK_DEFAULT: flags = info->params.flags &
|
(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
|
HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
|
HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
|
HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break;
|
default: return -EINVAL;
|
}
|
|
if (new_line.loopback != 0 && new_line.loopback != 1)
|
return -EINVAL;
|
|
info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
|
HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
|
HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
|
HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
|
info->params.flags |= flags;
|
|
info->params.loopback = new_line.loopback;
|
|
if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG))
|
info->params.clock_speed = new_line.clock_rate;
|
else
|
info->params.clock_speed = 0;
|
|
/* if network interface up, reprogram hardware */
|
if (info->netcount)
|
program_hw(info);
|
return 0;
|
|
default:
|
return hdlc_ioctl(dev, ifr, cmd);
|
}
|
}
|
|
/**
|
* hdlcdev_tx_timeout - called by network layer when transmit timeout is detected
|
* @dev: pointer to network device structure
|
*/
|
static void hdlcdev_tx_timeout(struct net_device *dev, unsigned int txqueue)
|
{
|
SLMP_INFO *info = dev_to_port(dev);
|
unsigned long flags;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("hdlcdev_tx_timeout(%s)\n",dev->name);
|
|
dev->stats.tx_errors++;
|
dev->stats.tx_aborted_errors++;
|
|
spin_lock_irqsave(&info->lock,flags);
|
tx_stop(info);
|
spin_unlock_irqrestore(&info->lock,flags);
|
|
netif_wake_queue(dev);
|
}
|
|
/**
|
* hdlcdev_tx_done - called by device driver when transmit completes
|
* @info: pointer to device instance information
|
*
|
* Reenable network layer transmit if stopped.
|
*/
|
static void hdlcdev_tx_done(SLMP_INFO *info)
|
{
|
if (netif_queue_stopped(info->netdev))
|
netif_wake_queue(info->netdev);
|
}
|
|
/**
|
* hdlcdev_rx - called by device driver when frame received
|
* @info: pointer to device instance information
|
* @buf: pointer to buffer contianing frame data
|
* @size: count of data bytes in buf
|
*
|
* Pass frame to network layer.
|
*/
|
static void hdlcdev_rx(SLMP_INFO *info, char *buf, int size)
|
{
|
struct sk_buff *skb = dev_alloc_skb(size);
|
struct net_device *dev = info->netdev;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("hdlcdev_rx(%s)\n",dev->name);
|
|
if (skb == NULL) {
|
printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n",
|
dev->name);
|
dev->stats.rx_dropped++;
|
return;
|
}
|
|
skb_put_data(skb, buf, size);
|
|
skb->protocol = hdlc_type_trans(skb, dev);
|
|
dev->stats.rx_packets++;
|
dev->stats.rx_bytes += size;
|
|
netif_rx(skb);
|
}
|
|
static const struct net_device_ops hdlcdev_ops = {
|
.ndo_open = hdlcdev_open,
|
.ndo_stop = hdlcdev_close,
|
.ndo_start_xmit = hdlc_start_xmit,
|
.ndo_do_ioctl = hdlcdev_ioctl,
|
.ndo_tx_timeout = hdlcdev_tx_timeout,
|
};
|
|
/**
|
* hdlcdev_init - called by device driver when adding device instance
|
* @info: pointer to device instance information
|
*
|
* Do generic HDLC initialization.
|
*
|
* Return: 0 if success, otherwise error code
|
*/
|
static int hdlcdev_init(SLMP_INFO *info)
|
{
|
int rc;
|
struct net_device *dev;
|
hdlc_device *hdlc;
|
|
/* allocate and initialize network and HDLC layer objects */
|
|
dev = alloc_hdlcdev(info);
|
if (!dev) {
|
printk(KERN_ERR "%s:hdlc device allocation failure\n",__FILE__);
|
return -ENOMEM;
|
}
|
|
/* for network layer reporting purposes only */
|
dev->mem_start = info->phys_sca_base;
|
dev->mem_end = info->phys_sca_base + SCA_BASE_SIZE - 1;
|
dev->irq = info->irq_level;
|
|
/* network layer callbacks and settings */
|
dev->netdev_ops = &hdlcdev_ops;
|
dev->watchdog_timeo = 10 * HZ;
|
dev->tx_queue_len = 50;
|
|
/* generic HDLC layer callbacks and settings */
|
hdlc = dev_to_hdlc(dev);
|
hdlc->attach = hdlcdev_attach;
|
hdlc->xmit = hdlcdev_xmit;
|
|
/* register objects with HDLC layer */
|
rc = register_hdlc_device(dev);
|
if (rc) {
|
printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__);
|
free_netdev(dev);
|
return rc;
|
}
|
|
info->netdev = dev;
|
return 0;
|
}
|
|
/**
|
* hdlcdev_exit - called by device driver when removing device instance
|
* @info: pointer to device instance information
|
*
|
* Do generic HDLC cleanup.
|
*/
|
static void hdlcdev_exit(SLMP_INFO *info)
|
{
|
unregister_hdlc_device(info->netdev);
|
free_netdev(info->netdev);
|
info->netdev = NULL;
|
}
|
|
#endif /* CONFIG_HDLC */
|
|
|
/* Return next bottom half action to perform.
|
* Return Value: BH action code or 0 if nothing to do.
|
*/
|
static int bh_action(SLMP_INFO *info)
|
{
|
unsigned long flags;
|
int rc = 0;
|
|
spin_lock_irqsave(&info->lock,flags);
|
|
if (info->pending_bh & BH_RECEIVE) {
|
info->pending_bh &= ~BH_RECEIVE;
|
rc = BH_RECEIVE;
|
} else if (info->pending_bh & BH_TRANSMIT) {
|
info->pending_bh &= ~BH_TRANSMIT;
|
rc = BH_TRANSMIT;
|
} else if (info->pending_bh & BH_STATUS) {
|
info->pending_bh &= ~BH_STATUS;
|
rc = BH_STATUS;
|
}
|
|
if (!rc) {
|
/* Mark BH routine as complete */
|
info->bh_running = false;
|
info->bh_requested = false;
|
}
|
|
spin_unlock_irqrestore(&info->lock,flags);
|
|
return rc;
|
}
|
|
/* Perform bottom half processing of work items queued by ISR.
|
*/
|
static void bh_handler(struct work_struct *work)
|
{
|
SLMP_INFO *info = container_of(work, SLMP_INFO, task);
|
int action;
|
|
if ( debug_level >= DEBUG_LEVEL_BH )
|
printk( "%s(%d):%s bh_handler() entry\n",
|
__FILE__,__LINE__,info->device_name);
|
|
info->bh_running = true;
|
|
while((action = bh_action(info)) != 0) {
|
|
/* Process work item */
|
if ( debug_level >= DEBUG_LEVEL_BH )
|
printk( "%s(%d):%s bh_handler() work item action=%d\n",
|
__FILE__,__LINE__,info->device_name, action);
|
|
switch (action) {
|
|
case BH_RECEIVE:
|
bh_receive(info);
|
break;
|
case BH_TRANSMIT:
|
bh_transmit(info);
|
break;
|
case BH_STATUS:
|
bh_status(info);
|
break;
|
default:
|
/* unknown work item ID */
|
printk("%s(%d):%s Unknown work item ID=%08X!\n",
|
__FILE__,__LINE__,info->device_name,action);
|
break;
|
}
|
}
|
|
if ( debug_level >= DEBUG_LEVEL_BH )
|
printk( "%s(%d):%s bh_handler() exit\n",
|
__FILE__,__LINE__,info->device_name);
|
}
|
|
static void bh_receive(SLMP_INFO *info)
|
{
|
if ( debug_level >= DEBUG_LEVEL_BH )
|
printk( "%s(%d):%s bh_receive()\n",
|
__FILE__,__LINE__,info->device_name);
|
|
while( rx_get_frame(info) );
|
}
|
|
static void bh_transmit(SLMP_INFO *info)
|
{
|
struct tty_struct *tty = info->port.tty;
|
|
if ( debug_level >= DEBUG_LEVEL_BH )
|
printk( "%s(%d):%s bh_transmit() entry\n",
|
__FILE__,__LINE__,info->device_name);
|
|
if (tty)
|
tty_wakeup(tty);
|
}
|
|
static void bh_status(SLMP_INFO *info)
|
{
|
if ( debug_level >= DEBUG_LEVEL_BH )
|
printk( "%s(%d):%s bh_status() entry\n",
|
__FILE__,__LINE__,info->device_name);
|
|
info->ri_chkcount = 0;
|
info->dsr_chkcount = 0;
|
info->dcd_chkcount = 0;
|
info->cts_chkcount = 0;
|
}
|
|
static void isr_timer(SLMP_INFO * info)
|
{
|
unsigned char timer = (info->port_num & 1) ? TIMER2 : TIMER0;
|
|
/* IER2<7..4> = timer<3..0> interrupt enables (0=disabled) */
|
write_reg(info, IER2, 0);
|
|
/* TMCS, Timer Control/Status Register
|
*
|
* 07 CMF, Compare match flag (read only) 1=match
|
* 06 ECMI, CMF Interrupt Enable: 0=disabled
|
* 05 Reserved, must be 0
|
* 04 TME, Timer Enable
|
* 03..00 Reserved, must be 0
|
*
|
* 0000 0000
|
*/
|
write_reg(info, (unsigned char)(timer + TMCS), 0);
|
|
info->irq_occurred = true;
|
|
if ( debug_level >= DEBUG_LEVEL_ISR )
|
printk("%s(%d):%s isr_timer()\n",
|
__FILE__,__LINE__,info->device_name);
|
}
|
|
static void isr_rxint(SLMP_INFO * info)
|
{
|
struct tty_struct *tty = info->port.tty;
|
struct mgsl_icount *icount = &info->icount;
|
unsigned char status = read_reg(info, SR1) & info->ie1_value & (FLGD + IDLD + CDCD + BRKD);
|
unsigned char status2 = read_reg(info, SR2) & info->ie2_value & OVRN;
|
|
/* clear status bits */
|
if (status)
|
write_reg(info, SR1, status);
|
|
if (status2)
|
write_reg(info, SR2, status2);
|
|
if ( debug_level >= DEBUG_LEVEL_ISR )
|
printk("%s(%d):%s isr_rxint status=%02X %02x\n",
|
__FILE__,__LINE__,info->device_name,status,status2);
|
|
if (info->params.mode == MGSL_MODE_ASYNC) {
|
if (status & BRKD) {
|
icount->brk++;
|
|
/* process break detection if tty control
|
* is not set to ignore it
|
*/
|
if (!(status & info->ignore_status_mask1)) {
|
if (info->read_status_mask1 & BRKD) {
|
tty_insert_flip_char(&info->port, 0, TTY_BREAK);
|
if (tty && (info->port.flags & ASYNC_SAK))
|
do_SAK(tty);
|
}
|
}
|
}
|
}
|
else {
|
if (status & (FLGD|IDLD)) {
|
if (status & FLGD)
|
info->icount.exithunt++;
|
else if (status & IDLD)
|
info->icount.rxidle++;
|
wake_up_interruptible(&info->event_wait_q);
|
}
|
}
|
|
if (status & CDCD) {
|
/* simulate a common modem status change interrupt
|
* for our handler
|
*/
|
get_signals( info );
|
isr_io_pin(info,
|
MISCSTATUS_DCD_LATCHED|(info->serial_signals&SerialSignal_DCD));
|
}
|
}
|
|
/*
|
* handle async rx data interrupts
|
*/
|
static void isr_rxrdy(SLMP_INFO * info)
|
{
|
u16 status;
|
unsigned char DataByte;
|
struct mgsl_icount *icount = &info->icount;
|
|
if ( debug_level >= DEBUG_LEVEL_ISR )
|
printk("%s(%d):%s isr_rxrdy\n",
|
__FILE__,__LINE__,info->device_name);
|
|
while((status = read_reg(info,CST0)) & BIT0)
|
{
|
int flag = 0;
|
bool over = false;
|
DataByte = read_reg(info,TRB);
|
|
icount->rx++;
|
|
if ( status & (PE + FRME + OVRN) ) {
|
printk("%s(%d):%s rxerr=%04X\n",
|
__FILE__,__LINE__,info->device_name,status);
|
|
/* update error statistics */
|
if (status & PE)
|
icount->parity++;
|
else if (status & FRME)
|
icount->frame++;
|
else if (status & OVRN)
|
icount->overrun++;
|
|
/* discard char if tty control flags say so */
|
if (status & info->ignore_status_mask2)
|
continue;
|
|
status &= info->read_status_mask2;
|
|
if (status & PE)
|
flag = TTY_PARITY;
|
else if (status & FRME)
|
flag = TTY_FRAME;
|
if (status & OVRN) {
|
/* Overrun is special, since it's
|
* reported immediately, and doesn't
|
* affect the current character
|
*/
|
over = true;
|
}
|
} /* end of if (error) */
|
|
tty_insert_flip_char(&info->port, DataByte, flag);
|
if (over)
|
tty_insert_flip_char(&info->port, 0, TTY_OVERRUN);
|
}
|
|
if ( debug_level >= DEBUG_LEVEL_ISR ) {
|
printk("%s(%d):%s rx=%d brk=%d parity=%d frame=%d overrun=%d\n",
|
__FILE__,__LINE__,info->device_name,
|
icount->rx,icount->brk,icount->parity,
|
icount->frame,icount->overrun);
|
}
|
|
tty_flip_buffer_push(&info->port);
|
}
|
|
static void isr_txeom(SLMP_INFO * info, unsigned char status)
|
{
|
if ( debug_level >= DEBUG_LEVEL_ISR )
|
printk("%s(%d):%s isr_txeom status=%02x\n",
|
__FILE__,__LINE__,info->device_name,status);
|
|
write_reg(info, TXDMA + DIR, 0x00); /* disable Tx DMA IRQs */
|
write_reg(info, TXDMA + DSR, 0xc0); /* clear IRQs and disable DMA */
|
write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
|
|
if (status & UDRN) {
|
write_reg(info, CMD, TXRESET);
|
write_reg(info, CMD, TXENABLE);
|
} else
|
write_reg(info, CMD, TXBUFCLR);
|
|
/* disable and clear tx interrupts */
|
info->ie0_value &= ~TXRDYE;
|
info->ie1_value &= ~(IDLE + UDRN);
|
write_reg16(info, IE0, (unsigned short)((info->ie1_value << 8) + info->ie0_value));
|
write_reg(info, SR1, (unsigned char)(UDRN + IDLE));
|
|
if ( info->tx_active ) {
|
if (info->params.mode != MGSL_MODE_ASYNC) {
|
if (status & UDRN)
|
info->icount.txunder++;
|
else if (status & IDLE)
|
info->icount.txok++;
|
}
|
|
info->tx_active = false;
|
info->tx_count = info->tx_put = info->tx_get = 0;
|
|
del_timer(&info->tx_timer);
|
|
if (info->params.mode != MGSL_MODE_ASYNC && info->drop_rts_on_tx_done ) {
|
info->serial_signals &= ~SerialSignal_RTS;
|
info->drop_rts_on_tx_done = false;
|
set_signals(info);
|
}
|
|
#if SYNCLINK_GENERIC_HDLC
|
if (info->netcount)
|
hdlcdev_tx_done(info);
|
else
|
#endif
|
{
|
if (info->port.tty && (info->port.tty->stopped || info->port.tty->hw_stopped)) {
|
tx_stop(info);
|
return;
|
}
|
info->pending_bh |= BH_TRANSMIT;
|
}
|
}
|
}
|
|
|
/*
|
* handle tx status interrupts
|
*/
|
static void isr_txint(SLMP_INFO * info)
|
{
|
unsigned char status = read_reg(info, SR1) & info->ie1_value & (UDRN + IDLE + CCTS);
|
|
/* clear status bits */
|
write_reg(info, SR1, status);
|
|
if ( debug_level >= DEBUG_LEVEL_ISR )
|
printk("%s(%d):%s isr_txint status=%02x\n",
|
__FILE__,__LINE__,info->device_name,status);
|
|
if (status & (UDRN + IDLE))
|
isr_txeom(info, status);
|
|
if (status & CCTS) {
|
/* simulate a common modem status change interrupt
|
* for our handler
|
*/
|
get_signals( info );
|
isr_io_pin(info,
|
MISCSTATUS_CTS_LATCHED|(info->serial_signals&SerialSignal_CTS));
|
|
}
|
}
|
|
/*
|
* handle async tx data interrupts
|
*/
|
static void isr_txrdy(SLMP_INFO * info)
|
{
|
if ( debug_level >= DEBUG_LEVEL_ISR )
|
printk("%s(%d):%s isr_txrdy() tx_count=%d\n",
|
__FILE__,__LINE__,info->device_name,info->tx_count);
|
|
if (info->params.mode != MGSL_MODE_ASYNC) {
|
/* disable TXRDY IRQ, enable IDLE IRQ */
|
info->ie0_value &= ~TXRDYE;
|
info->ie1_value |= IDLE;
|
write_reg16(info, IE0, (unsigned short)((info->ie1_value << 8) + info->ie0_value));
|
return;
|
}
|
|
if (info->port.tty && (info->port.tty->stopped || info->port.tty->hw_stopped)) {
|
tx_stop(info);
|
return;
|
}
|
|
if ( info->tx_count )
|
tx_load_fifo( info );
|
else {
|
info->tx_active = false;
|
info->ie0_value &= ~TXRDYE;
|
write_reg(info, IE0, info->ie0_value);
|
}
|
|
if (info->tx_count < WAKEUP_CHARS)
|
info->pending_bh |= BH_TRANSMIT;
|
}
|
|
static void isr_rxdmaok(SLMP_INFO * info)
|
{
|
/* BIT7 = EOT (end of transfer)
|
* BIT6 = EOM (end of message/frame)
|
*/
|
unsigned char status = read_reg(info,RXDMA + DSR) & 0xc0;
|
|
/* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */
|
write_reg(info, RXDMA + DSR, (unsigned char)(status | 1));
|
|
if ( debug_level >= DEBUG_LEVEL_ISR )
|
printk("%s(%d):%s isr_rxdmaok(), status=%02x\n",
|
__FILE__,__LINE__,info->device_name,status);
|
|
info->pending_bh |= BH_RECEIVE;
|
}
|
|
static void isr_rxdmaerror(SLMP_INFO * info)
|
{
|
/* BIT5 = BOF (buffer overflow)
|
* BIT4 = COF (counter overflow)
|
*/
|
unsigned char status = read_reg(info,RXDMA + DSR) & 0x30;
|
|
/* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */
|
write_reg(info, RXDMA + DSR, (unsigned char)(status | 1));
|
|
if ( debug_level >= DEBUG_LEVEL_ISR )
|
printk("%s(%d):%s isr_rxdmaerror(), status=%02x\n",
|
__FILE__,__LINE__,info->device_name,status);
|
|
info->rx_overflow = true;
|
info->pending_bh |= BH_RECEIVE;
|
}
|
|
static void isr_txdmaok(SLMP_INFO * info)
|
{
|
unsigned char status_reg1 = read_reg(info, SR1);
|
|
write_reg(info, TXDMA + DIR, 0x00); /* disable Tx DMA IRQs */
|
write_reg(info, TXDMA + DSR, 0xc0); /* clear IRQs and disable DMA */
|
write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
|
|
if ( debug_level >= DEBUG_LEVEL_ISR )
|
printk("%s(%d):%s isr_txdmaok(), status=%02x\n",
|
__FILE__,__LINE__,info->device_name,status_reg1);
|
|
/* program TXRDY as FIFO empty flag, enable TXRDY IRQ */
|
write_reg16(info, TRC0, 0);
|
info->ie0_value |= TXRDYE;
|
write_reg(info, IE0, info->ie0_value);
|
}
|
|
static void isr_txdmaerror(SLMP_INFO * info)
|
{
|
/* BIT5 = BOF (buffer overflow)
|
* BIT4 = COF (counter overflow)
|
*/
|
unsigned char status = read_reg(info,TXDMA + DSR) & 0x30;
|
|
/* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */
|
write_reg(info, TXDMA + DSR, (unsigned char)(status | 1));
|
|
if ( debug_level >= DEBUG_LEVEL_ISR )
|
printk("%s(%d):%s isr_txdmaerror(), status=%02x\n",
|
__FILE__,__LINE__,info->device_name,status);
|
}
|
|
/* handle input serial signal changes
|
*/
|
static void isr_io_pin( SLMP_INFO *info, u16 status )
|
{
|
struct mgsl_icount *icount;
|
|
if ( debug_level >= DEBUG_LEVEL_ISR )
|
printk("%s(%d):isr_io_pin status=%04X\n",
|
__FILE__,__LINE__,status);
|
|
if (status & (MISCSTATUS_CTS_LATCHED | MISCSTATUS_DCD_LATCHED |
|
MISCSTATUS_DSR_LATCHED | MISCSTATUS_RI_LATCHED) ) {
|
icount = &info->icount;
|
/* update input line counters */
|
if (status & MISCSTATUS_RI_LATCHED) {
|
icount->rng++;
|
if ( status & SerialSignal_RI )
|
info->input_signal_events.ri_up++;
|
else
|
info->input_signal_events.ri_down++;
|
}
|
if (status & MISCSTATUS_DSR_LATCHED) {
|
icount->dsr++;
|
if ( status & SerialSignal_DSR )
|
info->input_signal_events.dsr_up++;
|
else
|
info->input_signal_events.dsr_down++;
|
}
|
if (status & MISCSTATUS_DCD_LATCHED) {
|
if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) {
|
info->ie1_value &= ~CDCD;
|
write_reg(info, IE1, info->ie1_value);
|
}
|
icount->dcd++;
|
if (status & SerialSignal_DCD) {
|
info->input_signal_events.dcd_up++;
|
} else
|
info->input_signal_events.dcd_down++;
|
#if SYNCLINK_GENERIC_HDLC
|
if (info->netcount) {
|
if (status & SerialSignal_DCD)
|
netif_carrier_on(info->netdev);
|
else
|
netif_carrier_off(info->netdev);
|
}
|
#endif
|
}
|
if (status & MISCSTATUS_CTS_LATCHED)
|
{
|
if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) {
|
info->ie1_value &= ~CCTS;
|
write_reg(info, IE1, info->ie1_value);
|
}
|
icount->cts++;
|
if ( status & SerialSignal_CTS )
|
info->input_signal_events.cts_up++;
|
else
|
info->input_signal_events.cts_down++;
|
}
|
wake_up_interruptible(&info->status_event_wait_q);
|
wake_up_interruptible(&info->event_wait_q);
|
|
if (tty_port_check_carrier(&info->port) &&
|
(status & MISCSTATUS_DCD_LATCHED) ) {
|
if ( debug_level >= DEBUG_LEVEL_ISR )
|
printk("%s CD now %s...", info->device_name,
|
(status & SerialSignal_DCD) ? "on" : "off");
|
if (status & SerialSignal_DCD)
|
wake_up_interruptible(&info->port.open_wait);
|
else {
|
if ( debug_level >= DEBUG_LEVEL_ISR )
|
printk("doing serial hangup...");
|
if (info->port.tty)
|
tty_hangup(info->port.tty);
|
}
|
}
|
|
if (tty_port_cts_enabled(&info->port) &&
|
(status & MISCSTATUS_CTS_LATCHED) ) {
|
if ( info->port.tty ) {
|
if (info->port.tty->hw_stopped) {
|
if (status & SerialSignal_CTS) {
|
if ( debug_level >= DEBUG_LEVEL_ISR )
|
printk("CTS tx start...");
|
info->port.tty->hw_stopped = 0;
|
tx_start(info);
|
info->pending_bh |= BH_TRANSMIT;
|
return;
|
}
|
} else {
|
if (!(status & SerialSignal_CTS)) {
|
if ( debug_level >= DEBUG_LEVEL_ISR )
|
printk("CTS tx stop...");
|
info->port.tty->hw_stopped = 1;
|
tx_stop(info);
|
}
|
}
|
}
|
}
|
}
|
|
info->pending_bh |= BH_STATUS;
|
}
|
|
/* Interrupt service routine entry point.
|
*
|
* Arguments:
|
* irq interrupt number that caused interrupt
|
* dev_id device ID supplied during interrupt registration
|
* regs interrupted processor context
|
*/
|
static irqreturn_t synclinkmp_interrupt(int dummy, void *dev_id)
|
{
|
SLMP_INFO *info = dev_id;
|
unsigned char status, status0, status1=0;
|
unsigned char dmastatus, dmastatus0, dmastatus1=0;
|
unsigned char timerstatus0, timerstatus1=0;
|
unsigned char shift;
|
unsigned int i;
|
unsigned short tmp;
|
|
if ( debug_level >= DEBUG_LEVEL_ISR )
|
printk(KERN_DEBUG "%s(%d): synclinkmp_interrupt(%d)entry.\n",
|
__FILE__, __LINE__, info->irq_level);
|
|
spin_lock(&info->lock);
|
|
for(;;) {
|
|
/* get status for SCA0 (ports 0-1) */
|
tmp = read_reg16(info, ISR0); /* get ISR0 and ISR1 in one read */
|
status0 = (unsigned char)tmp;
|
dmastatus0 = (unsigned char)(tmp>>8);
|
timerstatus0 = read_reg(info, ISR2);
|
|
if ( debug_level >= DEBUG_LEVEL_ISR )
|
printk(KERN_DEBUG "%s(%d):%s status0=%02x, dmastatus0=%02x, timerstatus0=%02x\n",
|
__FILE__, __LINE__, info->device_name,
|
status0, dmastatus0, timerstatus0);
|
|
if (info->port_count == 4) {
|
/* get status for SCA1 (ports 2-3) */
|
tmp = read_reg16(info->port_array[2], ISR0);
|
status1 = (unsigned char)tmp;
|
dmastatus1 = (unsigned char)(tmp>>8);
|
timerstatus1 = read_reg(info->port_array[2], ISR2);
|
|
if ( debug_level >= DEBUG_LEVEL_ISR )
|
printk("%s(%d):%s status1=%02x, dmastatus1=%02x, timerstatus1=%02x\n",
|
__FILE__,__LINE__,info->device_name,
|
status1,dmastatus1,timerstatus1);
|
}
|
|
if (!status0 && !dmastatus0 && !timerstatus0 &&
|
!status1 && !dmastatus1 && !timerstatus1)
|
break;
|
|
for(i=0; i < info->port_count ; i++) {
|
if (info->port_array[i] == NULL)
|
continue;
|
if (i < 2) {
|
status = status0;
|
dmastatus = dmastatus0;
|
} else {
|
status = status1;
|
dmastatus = dmastatus1;
|
}
|
|
shift = i & 1 ? 4 :0;
|
|
if (status & BIT0 << shift)
|
isr_rxrdy(info->port_array[i]);
|
if (status & BIT1 << shift)
|
isr_txrdy(info->port_array[i]);
|
if (status & BIT2 << shift)
|
isr_rxint(info->port_array[i]);
|
if (status & BIT3 << shift)
|
isr_txint(info->port_array[i]);
|
|
if (dmastatus & BIT0 << shift)
|
isr_rxdmaerror(info->port_array[i]);
|
if (dmastatus & BIT1 << shift)
|
isr_rxdmaok(info->port_array[i]);
|
if (dmastatus & BIT2 << shift)
|
isr_txdmaerror(info->port_array[i]);
|
if (dmastatus & BIT3 << shift)
|
isr_txdmaok(info->port_array[i]);
|
}
|
|
if (timerstatus0 & (BIT5 | BIT4))
|
isr_timer(info->port_array[0]);
|
if (timerstatus0 & (BIT7 | BIT6))
|
isr_timer(info->port_array[1]);
|
if (timerstatus1 & (BIT5 | BIT4))
|
isr_timer(info->port_array[2]);
|
if (timerstatus1 & (BIT7 | BIT6))
|
isr_timer(info->port_array[3]);
|
}
|
|
for(i=0; i < info->port_count ; i++) {
|
SLMP_INFO * port = info->port_array[i];
|
|
/* Request bottom half processing if there's something
|
* for it to do and the bh is not already running.
|
*
|
* Note: startup adapter diags require interrupts.
|
* do not request bottom half processing if the
|
* device is not open in a normal mode.
|
*/
|
if ( port && (port->port.count || port->netcount) &&
|
port->pending_bh && !port->bh_running &&
|
!port->bh_requested ) {
|
if ( debug_level >= DEBUG_LEVEL_ISR )
|
printk("%s(%d):%s queueing bh task.\n",
|
__FILE__,__LINE__,port->device_name);
|
schedule_work(&port->task);
|
port->bh_requested = true;
|
}
|
}
|
|
spin_unlock(&info->lock);
|
|
if ( debug_level >= DEBUG_LEVEL_ISR )
|
printk(KERN_DEBUG "%s(%d):synclinkmp_interrupt(%d)exit.\n",
|
__FILE__, __LINE__, info->irq_level);
|
return IRQ_HANDLED;
|
}
|
|
/* Initialize and start device.
|
*/
|
static int startup(SLMP_INFO * info)
|
{
|
if ( debug_level >= DEBUG_LEVEL_INFO )
|
printk("%s(%d):%s tx_releaseup()\n",__FILE__,__LINE__,info->device_name);
|
|
if (tty_port_initialized(&info->port))
|
return 0;
|
|
if (!info->tx_buf) {
|
info->tx_buf = kmalloc(info->max_frame_size, GFP_KERNEL);
|
if (!info->tx_buf) {
|
printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n",
|
__FILE__,__LINE__,info->device_name);
|
return -ENOMEM;
|
}
|
}
|
|
info->pending_bh = 0;
|
|
memset(&info->icount, 0, sizeof(info->icount));
|
|
/* program hardware for current parameters */
|
reset_port(info);
|
|
change_params(info);
|
|
mod_timer(&info->status_timer, jiffies + msecs_to_jiffies(10));
|
|
if (info->port.tty)
|
clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
|
|
tty_port_set_initialized(&info->port, 1);
|
|
return 0;
|
}
|
|
/* Called by close() and hangup() to shutdown hardware
|
*/
|
static void shutdown(SLMP_INFO * info)
|
{
|
unsigned long flags;
|
|
if (!tty_port_initialized(&info->port))
|
return;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s synclinkmp_shutdown()\n",
|
__FILE__,__LINE__, info->device_name );
|
|
/* clear status wait queue because status changes */
|
/* can't happen after shutting down the hardware */
|
wake_up_interruptible(&info->status_event_wait_q);
|
wake_up_interruptible(&info->event_wait_q);
|
|
del_timer(&info->tx_timer);
|
del_timer(&info->status_timer);
|
|
kfree(info->tx_buf);
|
info->tx_buf = NULL;
|
|
spin_lock_irqsave(&info->lock,flags);
|
|
reset_port(info);
|
|
if (!info->port.tty || info->port.tty->termios.c_cflag & HUPCL) {
|
info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
|
set_signals(info);
|
}
|
|
spin_unlock_irqrestore(&info->lock,flags);
|
|
if (info->port.tty)
|
set_bit(TTY_IO_ERROR, &info->port.tty->flags);
|
|
tty_port_set_initialized(&info->port, 0);
|
}
|
|
static void program_hw(SLMP_INFO *info)
|
{
|
unsigned long flags;
|
|
spin_lock_irqsave(&info->lock,flags);
|
|
rx_stop(info);
|
tx_stop(info);
|
|
info->tx_count = info->tx_put = info->tx_get = 0;
|
|
if (info->params.mode == MGSL_MODE_HDLC || info->netcount)
|
hdlc_mode(info);
|
else
|
async_mode(info);
|
|
set_signals(info);
|
|
info->dcd_chkcount = 0;
|
info->cts_chkcount = 0;
|
info->ri_chkcount = 0;
|
info->dsr_chkcount = 0;
|
|
info->ie1_value |= (CDCD|CCTS);
|
write_reg(info, IE1, info->ie1_value);
|
|
get_signals(info);
|
|
if (info->netcount || (info->port.tty && info->port.tty->termios.c_cflag & CREAD) )
|
rx_start(info);
|
|
spin_unlock_irqrestore(&info->lock,flags);
|
}
|
|
/* Reconfigure adapter based on new parameters
|
*/
|
static void change_params(SLMP_INFO *info)
|
{
|
unsigned cflag;
|
int bits_per_char;
|
|
if (!info->port.tty)
|
return;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s change_params()\n",
|
__FILE__,__LINE__, info->device_name );
|
|
cflag = info->port.tty->termios.c_cflag;
|
|
/* if B0 rate (hangup) specified then negate RTS and DTR */
|
/* otherwise assert RTS and DTR */
|
if (cflag & CBAUD)
|
info->serial_signals |= SerialSignal_RTS | SerialSignal_DTR;
|
else
|
info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
|
|
/* byte size and parity */
|
|
switch (cflag & CSIZE) {
|
case CS5: info->params.data_bits = 5; break;
|
case CS6: info->params.data_bits = 6; break;
|
case CS7: info->params.data_bits = 7; break;
|
case CS8: info->params.data_bits = 8; break;
|
/* Never happens, but GCC is too dumb to figure it out */
|
default: info->params.data_bits = 7; break;
|
}
|
|
if (cflag & CSTOPB)
|
info->params.stop_bits = 2;
|
else
|
info->params.stop_bits = 1;
|
|
info->params.parity = ASYNC_PARITY_NONE;
|
if (cflag & PARENB) {
|
if (cflag & PARODD)
|
info->params.parity = ASYNC_PARITY_ODD;
|
else
|
info->params.parity = ASYNC_PARITY_EVEN;
|
#ifdef CMSPAR
|
if (cflag & CMSPAR)
|
info->params.parity = ASYNC_PARITY_SPACE;
|
#endif
|
}
|
|
/* calculate number of jiffies to transmit a full
|
* FIFO (32 bytes) at specified data rate
|
*/
|
bits_per_char = info->params.data_bits +
|
info->params.stop_bits + 1;
|
|
/* if port data rate is set to 460800 or less then
|
* allow tty settings to override, otherwise keep the
|
* current data rate.
|
*/
|
if (info->params.data_rate <= 460800) {
|
info->params.data_rate = tty_get_baud_rate(info->port.tty);
|
}
|
|
if ( info->params.data_rate ) {
|
info->timeout = (32*HZ*bits_per_char) /
|
info->params.data_rate;
|
}
|
info->timeout += HZ/50; /* Add .02 seconds of slop */
|
|
tty_port_set_cts_flow(&info->port, cflag & CRTSCTS);
|
tty_port_set_check_carrier(&info->port, ~cflag & CLOCAL);
|
|
/* process tty input control flags */
|
|
info->read_status_mask2 = OVRN;
|
if (I_INPCK(info->port.tty))
|
info->read_status_mask2 |= PE | FRME;
|
if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
|
info->read_status_mask1 |= BRKD;
|
if (I_IGNPAR(info->port.tty))
|
info->ignore_status_mask2 |= PE | FRME;
|
if (I_IGNBRK(info->port.tty)) {
|
info->ignore_status_mask1 |= BRKD;
|
/* If ignoring parity and break indicators, ignore
|
* overruns too. (For real raw support).
|
*/
|
if (I_IGNPAR(info->port.tty))
|
info->ignore_status_mask2 |= OVRN;
|
}
|
|
program_hw(info);
|
}
|
|
static int get_stats(SLMP_INFO * info, struct mgsl_icount __user *user_icount)
|
{
|
int err;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s get_params()\n",
|
__FILE__,__LINE__, info->device_name);
|
|
if (!user_icount) {
|
memset(&info->icount, 0, sizeof(info->icount));
|
} else {
|
mutex_lock(&info->port.mutex);
|
COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount));
|
mutex_unlock(&info->port.mutex);
|
if (err)
|
return -EFAULT;
|
}
|
|
return 0;
|
}
|
|
static int get_params(SLMP_INFO * info, MGSL_PARAMS __user *user_params)
|
{
|
int err;
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s get_params()\n",
|
__FILE__,__LINE__, info->device_name);
|
|
mutex_lock(&info->port.mutex);
|
COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS));
|
mutex_unlock(&info->port.mutex);
|
if (err) {
|
if ( debug_level >= DEBUG_LEVEL_INFO )
|
printk( "%s(%d):%s get_params() user buffer copy failed\n",
|
__FILE__,__LINE__,info->device_name);
|
return -EFAULT;
|
}
|
|
return 0;
|
}
|
|
static int set_params(SLMP_INFO * info, MGSL_PARAMS __user *new_params)
|
{
|
unsigned long flags;
|
MGSL_PARAMS tmp_params;
|
int err;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s set_params\n",
|
__FILE__,__LINE__,info->device_name );
|
COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS));
|
if (err) {
|
if ( debug_level >= DEBUG_LEVEL_INFO )
|
printk( "%s(%d):%s set_params() user buffer copy failed\n",
|
__FILE__,__LINE__,info->device_name);
|
return -EFAULT;
|
}
|
|
mutex_lock(&info->port.mutex);
|
spin_lock_irqsave(&info->lock,flags);
|
memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS));
|
spin_unlock_irqrestore(&info->lock,flags);
|
|
change_params(info);
|
mutex_unlock(&info->port.mutex);
|
|
return 0;
|
}
|
|
static int get_txidle(SLMP_INFO * info, int __user *idle_mode)
|
{
|
int err;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s get_txidle()=%d\n",
|
__FILE__,__LINE__, info->device_name, info->idle_mode);
|
|
COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int));
|
if (err) {
|
if ( debug_level >= DEBUG_LEVEL_INFO )
|
printk( "%s(%d):%s get_txidle() user buffer copy failed\n",
|
__FILE__,__LINE__,info->device_name);
|
return -EFAULT;
|
}
|
|
return 0;
|
}
|
|
static int set_txidle(SLMP_INFO * info, int idle_mode)
|
{
|
unsigned long flags;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s set_txidle(%d)\n",
|
__FILE__,__LINE__,info->device_name, idle_mode );
|
|
spin_lock_irqsave(&info->lock,flags);
|
info->idle_mode = idle_mode;
|
tx_set_idle( info );
|
spin_unlock_irqrestore(&info->lock,flags);
|
return 0;
|
}
|
|
static int tx_enable(SLMP_INFO * info, int enable)
|
{
|
unsigned long flags;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s tx_enable(%d)\n",
|
__FILE__,__LINE__,info->device_name, enable);
|
|
spin_lock_irqsave(&info->lock,flags);
|
if ( enable ) {
|
if ( !info->tx_enabled ) {
|
tx_start(info);
|
}
|
} else {
|
if ( info->tx_enabled )
|
tx_stop(info);
|
}
|
spin_unlock_irqrestore(&info->lock,flags);
|
return 0;
|
}
|
|
/* abort send HDLC frame
|
*/
|
static int tx_abort(SLMP_INFO * info)
|
{
|
unsigned long flags;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s tx_abort()\n",
|
__FILE__,__LINE__,info->device_name);
|
|
spin_lock_irqsave(&info->lock,flags);
|
if ( info->tx_active && info->params.mode == MGSL_MODE_HDLC ) {
|
info->ie1_value &= ~UDRN;
|
info->ie1_value |= IDLE;
|
write_reg(info, IE1, info->ie1_value); /* disable tx status interrupts */
|
write_reg(info, SR1, (unsigned char)(IDLE + UDRN)); /* clear pending */
|
|
write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */
|
write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
|
|
write_reg(info, CMD, TXABORT);
|
}
|
spin_unlock_irqrestore(&info->lock,flags);
|
return 0;
|
}
|
|
static int rx_enable(SLMP_INFO * info, int enable)
|
{
|
unsigned long flags;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s rx_enable(%d)\n",
|
__FILE__,__LINE__,info->device_name,enable);
|
|
spin_lock_irqsave(&info->lock,flags);
|
if ( enable ) {
|
if ( !info->rx_enabled )
|
rx_start(info);
|
} else {
|
if ( info->rx_enabled )
|
rx_stop(info);
|
}
|
spin_unlock_irqrestore(&info->lock,flags);
|
return 0;
|
}
|
|
/* wait for specified event to occur
|
*/
|
static int wait_mgsl_event(SLMP_INFO * info, int __user *mask_ptr)
|
{
|
unsigned long flags;
|
int s;
|
int rc=0;
|
struct mgsl_icount cprev, cnow;
|
int events;
|
int mask;
|
struct _input_signal_events oldsigs, newsigs;
|
DECLARE_WAITQUEUE(wait, current);
|
|
COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int));
|
if (rc) {
|
return -EFAULT;
|
}
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s wait_mgsl_event(%d)\n",
|
__FILE__,__LINE__,info->device_name,mask);
|
|
spin_lock_irqsave(&info->lock,flags);
|
|
/* return immediately if state matches requested events */
|
get_signals(info);
|
s = info->serial_signals;
|
|
events = mask &
|
( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) +
|
((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) +
|
((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) +
|
((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) );
|
if (events) {
|
spin_unlock_irqrestore(&info->lock,flags);
|
goto exit;
|
}
|
|
/* save current irq counts */
|
cprev = info->icount;
|
oldsigs = info->input_signal_events;
|
|
/* enable hunt and idle irqs if needed */
|
if (mask & (MgslEvent_ExitHuntMode+MgslEvent_IdleReceived)) {
|
unsigned char oldval = info->ie1_value;
|
unsigned char newval = oldval +
|
(mask & MgslEvent_ExitHuntMode ? FLGD:0) +
|
(mask & MgslEvent_IdleReceived ? IDLD:0);
|
if ( oldval != newval ) {
|
info->ie1_value = newval;
|
write_reg(info, IE1, info->ie1_value);
|
}
|
}
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
add_wait_queue(&info->event_wait_q, &wait);
|
|
spin_unlock_irqrestore(&info->lock,flags);
|
|
for(;;) {
|
schedule();
|
if (signal_pending(current)) {
|
rc = -ERESTARTSYS;
|
break;
|
}
|
|
/* get current irq counts */
|
spin_lock_irqsave(&info->lock,flags);
|
cnow = info->icount;
|
newsigs = info->input_signal_events;
|
set_current_state(TASK_INTERRUPTIBLE);
|
spin_unlock_irqrestore(&info->lock,flags);
|
|
/* if no change, wait aborted for some reason */
|
if (newsigs.dsr_up == oldsigs.dsr_up &&
|
newsigs.dsr_down == oldsigs.dsr_down &&
|
newsigs.dcd_up == oldsigs.dcd_up &&
|
newsigs.dcd_down == oldsigs.dcd_down &&
|
newsigs.cts_up == oldsigs.cts_up &&
|
newsigs.cts_down == oldsigs.cts_down &&
|
newsigs.ri_up == oldsigs.ri_up &&
|
newsigs.ri_down == oldsigs.ri_down &&
|
cnow.exithunt == cprev.exithunt &&
|
cnow.rxidle == cprev.rxidle) {
|
rc = -EIO;
|
break;
|
}
|
|
events = mask &
|
( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) +
|
(newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) +
|
(newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) +
|
(newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) +
|
(newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) +
|
(newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) +
|
(newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) +
|
(newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) +
|
(cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) +
|
(cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) );
|
if (events)
|
break;
|
|
cprev = cnow;
|
oldsigs = newsigs;
|
}
|
|
remove_wait_queue(&info->event_wait_q, &wait);
|
set_current_state(TASK_RUNNING);
|
|
|
if (mask & (MgslEvent_ExitHuntMode + MgslEvent_IdleReceived)) {
|
spin_lock_irqsave(&info->lock,flags);
|
if (!waitqueue_active(&info->event_wait_q)) {
|
/* disable enable exit hunt mode/idle rcvd IRQs */
|
info->ie1_value &= ~(FLGD|IDLD);
|
write_reg(info, IE1, info->ie1_value);
|
}
|
spin_unlock_irqrestore(&info->lock,flags);
|
}
|
exit:
|
if ( rc == 0 )
|
PUT_USER(rc, events, mask_ptr);
|
|
return rc;
|
}
|
|
static int modem_input_wait(SLMP_INFO *info,int arg)
|
{
|
unsigned long flags;
|
int rc;
|
struct mgsl_icount cprev, cnow;
|
DECLARE_WAITQUEUE(wait, current);
|
|
/* save current irq counts */
|
spin_lock_irqsave(&info->lock,flags);
|
cprev = info->icount;
|
add_wait_queue(&info->status_event_wait_q, &wait);
|
set_current_state(TASK_INTERRUPTIBLE);
|
spin_unlock_irqrestore(&info->lock,flags);
|
|
for(;;) {
|
schedule();
|
if (signal_pending(current)) {
|
rc = -ERESTARTSYS;
|
break;
|
}
|
|
/* get new irq counts */
|
spin_lock_irqsave(&info->lock,flags);
|
cnow = info->icount;
|
set_current_state(TASK_INTERRUPTIBLE);
|
spin_unlock_irqrestore(&info->lock,flags);
|
|
/* if no change, wait aborted for some reason */
|
if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
|
cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
|
rc = -EIO;
|
break;
|
}
|
|
/* check for change in caller specified modem input */
|
if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) ||
|
(arg & TIOCM_DSR && cnow.dsr != cprev.dsr) ||
|
(arg & TIOCM_CD && cnow.dcd != cprev.dcd) ||
|
(arg & TIOCM_CTS && cnow.cts != cprev.cts)) {
|
rc = 0;
|
break;
|
}
|
|
cprev = cnow;
|
}
|
remove_wait_queue(&info->status_event_wait_q, &wait);
|
set_current_state(TASK_RUNNING);
|
return rc;
|
}
|
|
/* return the state of the serial control and status signals
|
*/
|
static int tiocmget(struct tty_struct *tty)
|
{
|
SLMP_INFO *info = tty->driver_data;
|
unsigned int result;
|
unsigned long flags;
|
|
spin_lock_irqsave(&info->lock,flags);
|
get_signals(info);
|
spin_unlock_irqrestore(&info->lock,flags);
|
|
result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS : 0) |
|
((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR : 0) |
|
((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR : 0) |
|
((info->serial_signals & SerialSignal_RI) ? TIOCM_RNG : 0) |
|
((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR : 0) |
|
((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS : 0);
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s tiocmget() value=%08X\n",
|
__FILE__,__LINE__, info->device_name, result );
|
return result;
|
}
|
|
/* set modem control signals (DTR/RTS)
|
*/
|
static int tiocmset(struct tty_struct *tty,
|
unsigned int set, unsigned int clear)
|
{
|
SLMP_INFO *info = tty->driver_data;
|
unsigned long flags;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s tiocmset(%x,%x)\n",
|
__FILE__,__LINE__,info->device_name, set, clear);
|
|
if (set & TIOCM_RTS)
|
info->serial_signals |= SerialSignal_RTS;
|
if (set & TIOCM_DTR)
|
info->serial_signals |= SerialSignal_DTR;
|
if (clear & TIOCM_RTS)
|
info->serial_signals &= ~SerialSignal_RTS;
|
if (clear & TIOCM_DTR)
|
info->serial_signals &= ~SerialSignal_DTR;
|
|
spin_lock_irqsave(&info->lock,flags);
|
set_signals(info);
|
spin_unlock_irqrestore(&info->lock,flags);
|
|
return 0;
|
}
|
|
static int carrier_raised(struct tty_port *port)
|
{
|
SLMP_INFO *info = container_of(port, SLMP_INFO, port);
|
unsigned long flags;
|
|
spin_lock_irqsave(&info->lock,flags);
|
get_signals(info);
|
spin_unlock_irqrestore(&info->lock,flags);
|
|
return (info->serial_signals & SerialSignal_DCD) ? 1 : 0;
|
}
|
|
static void dtr_rts(struct tty_port *port, int on)
|
{
|
SLMP_INFO *info = container_of(port, SLMP_INFO, port);
|
unsigned long flags;
|
|
spin_lock_irqsave(&info->lock,flags);
|
if (on)
|
info->serial_signals |= SerialSignal_RTS | SerialSignal_DTR;
|
else
|
info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
|
set_signals(info);
|
spin_unlock_irqrestore(&info->lock,flags);
|
}
|
|
/* Block the current process until the specified port is ready to open.
|
*/
|
static int block_til_ready(struct tty_struct *tty, struct file *filp,
|
SLMP_INFO *info)
|
{
|
DECLARE_WAITQUEUE(wait, current);
|
int retval;
|
bool do_clocal = false;
|
unsigned long flags;
|
int cd;
|
struct tty_port *port = &info->port;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s block_til_ready()\n",
|
__FILE__,__LINE__, tty->driver->name );
|
|
if (filp->f_flags & O_NONBLOCK || tty_io_error(tty)) {
|
/* nonblock mode is set or port is not enabled */
|
/* just verify that callout device is not active */
|
tty_port_set_active(port, 1);
|
return 0;
|
}
|
|
if (C_CLOCAL(tty))
|
do_clocal = true;
|
|
/* Wait for carrier detect and the line to become
|
* free (i.e., not in use by the callout). While we are in
|
* this loop, port->count is dropped by one, so that
|
* close() knows when to free things. We restore it upon
|
* exit, either normal or abnormal.
|
*/
|
|
retval = 0;
|
add_wait_queue(&port->open_wait, &wait);
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s block_til_ready() before block, count=%d\n",
|
__FILE__,__LINE__, tty->driver->name, port->count );
|
|
spin_lock_irqsave(&info->lock, flags);
|
port->count--;
|
spin_unlock_irqrestore(&info->lock, flags);
|
port->blocked_open++;
|
|
while (1) {
|
if (C_BAUD(tty) && tty_port_initialized(port))
|
tty_port_raise_dtr_rts(port);
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
if (tty_hung_up_p(filp) || !tty_port_initialized(port)) {
|
retval = (port->flags & ASYNC_HUP_NOTIFY) ?
|
-EAGAIN : -ERESTARTSYS;
|
break;
|
}
|
|
cd = tty_port_carrier_raised(port);
|
if (do_clocal || cd)
|
break;
|
|
if (signal_pending(current)) {
|
retval = -ERESTARTSYS;
|
break;
|
}
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s block_til_ready() count=%d\n",
|
__FILE__,__LINE__, tty->driver->name, port->count );
|
|
tty_unlock(tty);
|
schedule();
|
tty_lock(tty);
|
}
|
|
set_current_state(TASK_RUNNING);
|
remove_wait_queue(&port->open_wait, &wait);
|
if (!tty_hung_up_p(filp))
|
port->count++;
|
port->blocked_open--;
|
|
if (debug_level >= DEBUG_LEVEL_INFO)
|
printk("%s(%d):%s block_til_ready() after, count=%d\n",
|
__FILE__,__LINE__, tty->driver->name, port->count );
|
|
if (!retval)
|
tty_port_set_active(port, 1);
|
|
return retval;
|
}
|
|
static int alloc_dma_bufs(SLMP_INFO *info)
|
{
|
unsigned short BuffersPerFrame;
|
unsigned short BufferCount;
|
|
// Force allocation to start at 64K boundary for each port.
|
// This is necessary because *all* buffer descriptors for a port
|
// *must* be in the same 64K block. All descriptors on a port
|
// share a common 'base' address (upper 8 bits of 24 bits) programmed
|
// into the CBP register.
|
info->port_array[0]->last_mem_alloc = (SCA_MEM_SIZE/4) * info->port_num;
|
|
/* Calculate the number of DMA buffers necessary to hold the */
|
/* largest allowable frame size. Note: If the max frame size is */
|
/* not an even multiple of the DMA buffer size then we need to */
|
/* round the buffer count per frame up one. */
|
|
BuffersPerFrame = (unsigned short)(info->max_frame_size/SCABUFSIZE);
|
if ( info->max_frame_size % SCABUFSIZE )
|
BuffersPerFrame++;
|
|
/* calculate total number of data buffers (SCABUFSIZE) possible
|
* in one ports memory (SCA_MEM_SIZE/4) after allocating memory
|
* for the descriptor list (BUFFERLISTSIZE).
|
*/
|
BufferCount = (SCA_MEM_SIZE/4 - BUFFERLISTSIZE)/SCABUFSIZE;
|
|
/* limit number of buffers to maximum amount of descriptors */
|
if (BufferCount > BUFFERLISTSIZE/sizeof(SCADESC))
|
BufferCount = BUFFERLISTSIZE/sizeof(SCADESC);
|
|
/* use enough buffers to transmit one max size frame */
|
info->tx_buf_count = BuffersPerFrame + 1;
|
|
/* never use more than half the available buffers for transmit */
|
if (info->tx_buf_count > (BufferCount/2))
|
info->tx_buf_count = BufferCount/2;
|
|
if (info->tx_buf_count > SCAMAXDESC)
|
info->tx_buf_count = SCAMAXDESC;
|
|
/* use remaining buffers for receive */
|
info->rx_buf_count = BufferCount - info->tx_buf_count;
|
|
if (info->rx_buf_count > SCAMAXDESC)
|
info->rx_buf_count = SCAMAXDESC;
|
|
if ( debug_level >= DEBUG_LEVEL_INFO )
|
printk("%s(%d):%s Allocating %d TX and %d RX DMA buffers.\n",
|
__FILE__,__LINE__, info->device_name,
|
info->tx_buf_count,info->rx_buf_count);
|
|
if ( alloc_buf_list( info ) < 0 ||
|
alloc_frame_bufs(info,
|
info->rx_buf_list,
|
info->rx_buf_list_ex,
|
info->rx_buf_count) < 0 ||
|
alloc_frame_bufs(info,
|
info->tx_buf_list,
|
info->tx_buf_list_ex,
|
info->tx_buf_count) < 0 ||
|
alloc_tmp_rx_buf(info) < 0 ) {
|
printk("%s(%d):%s Can't allocate DMA buffer memory\n",
|
__FILE__,__LINE__, info->device_name);
|
return -ENOMEM;
|
}
|
|
rx_reset_buffers( info );
|
|
return 0;
|
}
|
|
/* Allocate DMA buffers for the transmit and receive descriptor lists.
|
*/
|
static int alloc_buf_list(SLMP_INFO *info)
|
{
|
unsigned int i;
|
|
/* build list in adapter shared memory */
|
info->buffer_list = info->memory_base + info->port_array[0]->last_mem_alloc;
|
info->buffer_list_phys = info->port_array[0]->last_mem_alloc;
|
info->port_array[0]->last_mem_alloc += BUFFERLISTSIZE;
|
|
memset(info->buffer_list, 0, BUFFERLISTSIZE);
|
|
/* Save virtual address pointers to the receive and */
|
/* transmit buffer lists. (Receive 1st). These pointers will */
|
/* be used by the processor to access the lists. */
|
info->rx_buf_list = (SCADESC *)info->buffer_list;
|
|
info->tx_buf_list = (SCADESC *)info->buffer_list;
|
info->tx_buf_list += info->rx_buf_count;
|
|
/* Build links for circular buffer entry lists (tx and rx)
|
*
|
* Note: links are physical addresses read by the SCA device
|
* to determine the next buffer entry to use.
|
*/
|
|
for ( i = 0; i < info->rx_buf_count; i++ ) {
|
/* calculate and store physical address of this buffer entry */
|
info->rx_buf_list_ex[i].phys_entry =
|
info->buffer_list_phys + (i * SCABUFSIZE);
|
|
/* calculate and store physical address of */
|
/* next entry in cirular list of entries */
|
info->rx_buf_list[i].next = info->buffer_list_phys;
|
if ( i < info->rx_buf_count - 1 )
|
info->rx_buf_list[i].next += (i + 1) * sizeof(SCADESC);
|
|
info->rx_buf_list[i].length = SCABUFSIZE;
|
}
|
|
for ( i = 0; i < info->tx_buf_count; i++ ) {
|
/* calculate and store physical address of this buffer entry */
|
info->tx_buf_list_ex[i].phys_entry = info->buffer_list_phys +
|
((info->rx_buf_count + i) * sizeof(SCADESC));
|
|
/* calculate and store physical address of */
|
/* next entry in cirular list of entries */
|
|
info->tx_buf_list[i].next = info->buffer_list_phys +
|
info->rx_buf_count * sizeof(SCADESC);
|
|
if ( i < info->tx_buf_count - 1 )
|
info->tx_buf_list[i].next += (i + 1) * sizeof(SCADESC);
|
}
|
|
return 0;
|
}
|
|
/* Allocate the frame DMA buffers used by the specified buffer list.
|
*/
|
static int alloc_frame_bufs(SLMP_INFO *info, SCADESC *buf_list,SCADESC_EX *buf_list_ex,int count)
|
{
|
int i;
|
unsigned long phys_addr;
|
|
for ( i = 0; i < count; i++ ) {
|
buf_list_ex[i].virt_addr = info->memory_base + info->port_array[0]->last_mem_alloc;
|
phys_addr = info->port_array[0]->last_mem_alloc;
|
info->port_array[0]->last_mem_alloc += SCABUFSIZE;
|
|
buf_list[i].buf_ptr = (unsigned short)phys_addr;
|
buf_list[i].buf_base = (unsigned char)(phys_addr >> 16);
|
}
|
|
return 0;
|
}
|
|
static void free_dma_bufs(SLMP_INFO *info)
|
{
|
info->buffer_list = NULL;
|
info->rx_buf_list = NULL;
|
info->tx_buf_list = NULL;
|
}
|
|
/* allocate buffer large enough to hold max_frame_size.
|
* This buffer is used to pass an assembled frame to the line discipline.
|
*/
|
static int alloc_tmp_rx_buf(SLMP_INFO *info)
|
{
|
info->tmp_rx_buf = kmalloc(info->max_frame_size, GFP_KERNEL);
|
if (info->tmp_rx_buf == NULL)
|
return -ENOMEM;
|
/* unused flag buffer to satisfy receive_buf calling interface */
|
info->flag_buf = kzalloc(info->max_frame_size, GFP_KERNEL);
|
if (!info->flag_buf) {
|
kfree(info->tmp_rx_buf);
|
info->tmp_rx_buf = NULL;
|
return -ENOMEM;
|
}
|
return 0;
|
}
|
|
static void free_tmp_rx_buf(SLMP_INFO *info)
|
{
|
kfree(info->tmp_rx_buf);
|
info->tmp_rx_buf = NULL;
|
kfree(info->flag_buf);
|
info->flag_buf = NULL;
|
}
|
|
static int claim_resources(SLMP_INFO *info)
|
{
|
if (request_mem_region(info->phys_memory_base,SCA_MEM_SIZE,"synclinkmp") == NULL) {
|
printk( "%s(%d):%s mem addr conflict, Addr=%08X\n",
|
__FILE__,__LINE__,info->device_name, info->phys_memory_base);
|
info->init_error = DiagStatus_AddressConflict;
|
goto errout;
|
}
|
else
|
info->shared_mem_requested = true;
|
|
if (request_mem_region(info->phys_lcr_base + info->lcr_offset,128,"synclinkmp") == NULL) {
|
printk( "%s(%d):%s lcr mem addr conflict, Addr=%08X\n",
|
__FILE__,__LINE__,info->device_name, info->phys_lcr_base);
|
info->init_error = DiagStatus_AddressConflict;
|
goto errout;
|
}
|
else
|
info->lcr_mem_requested = true;
|
|
if (request_mem_region(info->phys_sca_base + info->sca_offset,SCA_BASE_SIZE,"synclinkmp") == NULL) {
|
printk( "%s(%d):%s sca mem addr conflict, Addr=%08X\n",
|
__FILE__,__LINE__,info->device_name, info->phys_sca_base);
|
info->init_error = DiagStatus_AddressConflict;
|
goto errout;
|
}
|
else
|
info->sca_base_requested = true;
|
|
if (request_mem_region(info->phys_statctrl_base + info->statctrl_offset,SCA_REG_SIZE,"synclinkmp") == NULL) {
|
printk( "%s(%d):%s stat/ctrl mem addr conflict, Addr=%08X\n",
|
__FILE__,__LINE__,info->device_name, info->phys_statctrl_base);
|
info->init_error = DiagStatus_AddressConflict;
|
goto errout;
|
}
|
else
|
info->sca_statctrl_requested = true;
|
|
info->memory_base = ioremap(info->phys_memory_base,
|
SCA_MEM_SIZE);
|
if (!info->memory_base) {
|
printk( "%s(%d):%s Can't map shared memory, MemAddr=%08X\n",
|
__FILE__,__LINE__,info->device_name, info->phys_memory_base );
|
info->init_error = DiagStatus_CantAssignPciResources;
|
goto errout;
|
}
|
|
info->lcr_base = ioremap(info->phys_lcr_base, PAGE_SIZE);
|
if (!info->lcr_base) {
|
printk( "%s(%d):%s Can't map LCR memory, MemAddr=%08X\n",
|
__FILE__,__LINE__,info->device_name, info->phys_lcr_base );
|
info->init_error = DiagStatus_CantAssignPciResources;
|
goto errout;
|
}
|
info->lcr_base += info->lcr_offset;
|
|
info->sca_base = ioremap(info->phys_sca_base, PAGE_SIZE);
|
if (!info->sca_base) {
|
printk( "%s(%d):%s Can't map SCA memory, MemAddr=%08X\n",
|
__FILE__,__LINE__,info->device_name, info->phys_sca_base );
|
info->init_error = DiagStatus_CantAssignPciResources;
|
goto errout;
|
}
|
info->sca_base += info->sca_offset;
|
|
info->statctrl_base = ioremap(info->phys_statctrl_base,
|
PAGE_SIZE);
|
if (!info->statctrl_base) {
|
printk( "%s(%d):%s Can't map SCA Status/Control memory, MemAddr=%08X\n",
|
__FILE__,__LINE__,info->device_name, info->phys_statctrl_base );
|
info->init_error = DiagStatus_CantAssignPciResources;
|
goto errout;
|
}
|
info->statctrl_base += info->statctrl_offset;
|
|
if ( !memory_test(info) ) {
|
printk( "%s(%d):Shared Memory Test failed for device %s MemAddr=%08X\n",
|
__FILE__,__LINE__,info->device_name, info->phys_memory_base );
|
info->init_error = DiagStatus_MemoryError;
|
goto errout;
|
}
|
|
return 0;
|
|
errout:
|
release_resources( info );
|
return -ENODEV;
|
}
|
|
static void release_resources(SLMP_INFO *info)
|
{
|
if ( debug_level >= DEBUG_LEVEL_INFO )
|
printk( "%s(%d):%s release_resources() entry\n",
|
__FILE__,__LINE__,info->device_name );
|
|
if ( info->irq_requested ) {
|
free_irq(info->irq_level, info);
|
info->irq_requested = false;
|
}
|
|
if ( info->shared_mem_requested ) {
|
release_mem_region(info->phys_memory_base,SCA_MEM_SIZE);
|
info->shared_mem_requested = false;
|
}
|
if ( info->lcr_mem_requested ) {
|
release_mem_region(info->phys_lcr_base + info->lcr_offset,128);
|
info->lcr_mem_requested = false;
|
}
|
if ( info->sca_base_requested ) {
|
release_mem_region(info->phys_sca_base + info->sca_offset,SCA_BASE_SIZE);
|
info->sca_base_requested = false;
|
}
|
if ( info->sca_statctrl_requested ) {
|
release_mem_region(info->phys_statctrl_base + info->statctrl_offset,SCA_REG_SIZE);
|
info->sca_statctrl_requested = false;
|
}
|
|
if (info->memory_base){
|
iounmap(info->memory_base);
|
info->memory_base = NULL;
|
}
|
|
if (info->sca_base) {
|
iounmap(info->sca_base - info->sca_offset);
|
info->sca_base=NULL;
|
}
|
|
if (info->statctrl_base) {
|
iounmap(info->statctrl_base - info->statctrl_offset);
|
info->statctrl_base=NULL;
|
}
|
|
if (info->lcr_base){
|
iounmap(info->lcr_base - info->lcr_offset);
|
info->lcr_base = NULL;
|
}
|
|
if ( debug_level >= DEBUG_LEVEL_INFO )
|
printk( "%s(%d):%s release_resources() exit\n",
|
__FILE__,__LINE__,info->device_name );
|
}
|
|
/* Add the specified device instance data structure to the
|
* global linked list of devices and increment the device count.
|
*/
|
static int add_device(SLMP_INFO *info)
|
{
|
info->next_device = NULL;
|
info->line = synclinkmp_device_count;
|
sprintf(info->device_name,"ttySLM%dp%d",info->adapter_num,info->port_num);
|
|
if (info->line < MAX_DEVICES) {
|
if (maxframe[info->line])
|
info->max_frame_size = maxframe[info->line];
|
}
|
|
synclinkmp_device_count++;
|
|
if ( !synclinkmp_device_list )
|
synclinkmp_device_list = info;
|
else {
|
SLMP_INFO *current_dev = synclinkmp_device_list;
|
while( current_dev->next_device )
|
current_dev = current_dev->next_device;
|
current_dev->next_device = info;
|
}
|
|
if ( info->max_frame_size < 4096 )
|
info->max_frame_size = 4096;
|
else if ( info->max_frame_size > 65535 )
|
info->max_frame_size = 65535;
|
|
printk( "SyncLink MultiPort %s: "
|
"Mem=(%08x %08X %08x %08X) IRQ=%d MaxFrameSize=%u\n",
|
info->device_name,
|
info->phys_sca_base,
|
info->phys_memory_base,
|
info->phys_statctrl_base,
|
info->phys_lcr_base,
|
info->irq_level,
|
info->max_frame_size );
|
|
#if SYNCLINK_GENERIC_HDLC
|
return hdlcdev_init(info);
|
#else
|
return 0;
|
#endif
|
}
|
|
static const struct tty_port_operations port_ops = {
|
.carrier_raised = carrier_raised,
|
.dtr_rts = dtr_rts,
|
};
|
|
/* Allocate and initialize a device instance structure
|
*
|
* Return Value: pointer to SLMP_INFO if success, otherwise NULL
|
*/
|
static SLMP_INFO *alloc_dev(int adapter_num, int port_num, struct pci_dev *pdev)
|
{
|
SLMP_INFO *info;
|
|
info = kzalloc(sizeof(SLMP_INFO),
|
GFP_KERNEL);
|
|
if (!info) {
|
printk("%s(%d) Error can't allocate device instance data for adapter %d, port %d\n",
|
__FILE__,__LINE__, adapter_num, port_num);
|
} else {
|
tty_port_init(&info->port);
|
info->port.ops = &port_ops;
|
info->magic = MGSL_MAGIC;
|
INIT_WORK(&info->task, bh_handler);
|
info->max_frame_size = 4096;
|
info->port.close_delay = 5*HZ/10;
|
info->port.closing_wait = 30*HZ;
|
init_waitqueue_head(&info->status_event_wait_q);
|
init_waitqueue_head(&info->event_wait_q);
|
spin_lock_init(&info->netlock);
|
memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS));
|
info->idle_mode = HDLC_TXIDLE_FLAGS;
|
info->adapter_num = adapter_num;
|
info->port_num = port_num;
|
|
/* Copy configuration info to device instance data */
|
info->irq_level = pdev->irq;
|
info->phys_lcr_base = pci_resource_start(pdev,0);
|
info->phys_sca_base = pci_resource_start(pdev,2);
|
info->phys_memory_base = pci_resource_start(pdev,3);
|
info->phys_statctrl_base = pci_resource_start(pdev,4);
|
|
/* Because veremap only works on page boundaries we must map
|
* a larger area than is actually implemented for the LCR
|
* memory range. We map a full page starting at the page boundary.
|
*/
|
info->lcr_offset = info->phys_lcr_base & (PAGE_SIZE-1);
|
info->phys_lcr_base &= ~(PAGE_SIZE-1);
|
|
info->sca_offset = info->phys_sca_base & (PAGE_SIZE-1);
|
info->phys_sca_base &= ~(PAGE_SIZE-1);
|
|
info->statctrl_offset = info->phys_statctrl_base & (PAGE_SIZE-1);
|
info->phys_statctrl_base &= ~(PAGE_SIZE-1);
|
|
info->bus_type = MGSL_BUS_TYPE_PCI;
|
info->irq_flags = IRQF_SHARED;
|
|
timer_setup(&info->tx_timer, tx_timeout, 0);
|
timer_setup(&info->status_timer, status_timeout, 0);
|
|
/* Store the PCI9050 misc control register value because a flaw
|
* in the PCI9050 prevents LCR registers from being read if
|
* BIOS assigns an LCR base address with bit 7 set.
|
*
|
* Only the misc control register is accessed for which only
|
* write access is needed, so set an initial value and change
|
* bits to the device instance data as we write the value
|
* to the actual misc control register.
|
*/
|
info->misc_ctrl_value = 0x087e4546;
|
|
/* initial port state is unknown - if startup errors
|
* occur, init_error will be set to indicate the
|
* problem. Once the port is fully initialized,
|
* this value will be set to 0 to indicate the
|
* port is available.
|
*/
|
info->init_error = -1;
|
}
|
|
return info;
|
}
|
|
static int device_init(int adapter_num, struct pci_dev *pdev)
|
{
|
SLMP_INFO *port_array[SCA_MAX_PORTS];
|
int port, rc;
|
|
/* allocate device instances for up to SCA_MAX_PORTS devices */
|
for ( port = 0; port < SCA_MAX_PORTS; ++port ) {
|
port_array[port] = alloc_dev(adapter_num,port,pdev);
|
if( port_array[port] == NULL ) {
|
for (--port; port >= 0; --port) {
|
tty_port_destroy(&port_array[port]->port);
|
kfree(port_array[port]);
|
}
|
return -ENOMEM;
|
}
|
}
|
|
/* give copy of port_array to all ports and add to device list */
|
for ( port = 0; port < SCA_MAX_PORTS; ++port ) {
|
memcpy(port_array[port]->port_array,port_array,sizeof(port_array));
|
rc = add_device( port_array[port] );
|
if (rc)
|
goto err_add;
|
spin_lock_init(&port_array[port]->lock);
|
}
|
|
/* Allocate and claim adapter resources */
|
if ( !claim_resources(port_array[0]) ) {
|
|
alloc_dma_bufs(port_array[0]);
|
|
/* copy resource information from first port to others */
|
for ( port = 1; port < SCA_MAX_PORTS; ++port ) {
|
port_array[port]->lock = port_array[0]->lock;
|
port_array[port]->irq_level = port_array[0]->irq_level;
|
port_array[port]->memory_base = port_array[0]->memory_base;
|
port_array[port]->sca_base = port_array[0]->sca_base;
|
port_array[port]->statctrl_base = port_array[0]->statctrl_base;
|
port_array[port]->lcr_base = port_array[0]->lcr_base;
|
alloc_dma_bufs(port_array[port]);
|
}
|
|
rc = request_irq(port_array[0]->irq_level,
|
synclinkmp_interrupt,
|
port_array[0]->irq_flags,
|
port_array[0]->device_name,
|
port_array[0]);
|
if ( rc ) {
|
printk( "%s(%d):%s Can't request interrupt, IRQ=%d\n",
|
__FILE__,__LINE__,
|
port_array[0]->device_name,
|
port_array[0]->irq_level );
|
goto err_irq;
|
}
|
port_array[0]->irq_requested = true;
|
adapter_test(port_array[0]);
|
}
|
return 0;
|
err_irq:
|
release_resources( port_array[0] );
|
err_add:
|
for ( port = 0; port < SCA_MAX_PORTS; ++port ) {
|
tty_port_destroy(&port_array[port]->port);
|
kfree(port_array[port]);
|
}
|
return rc;
|
}
|
|
static const struct tty_operations ops = {
|
.install = install,
|
.open = open,
|
.close = close,
|
.write = write,
|
.put_char = put_char,
|
.flush_chars = flush_chars,
|
.write_room = write_room,
|
.chars_in_buffer = chars_in_buffer,
|
.flush_buffer = flush_buffer,
|
.ioctl = ioctl,
|
.throttle = throttle,
|
.unthrottle = unthrottle,
|
.send_xchar = send_xchar,
|
.break_ctl = set_break,
|
.wait_until_sent = wait_until_sent,
|
.set_termios = set_termios,
|
.stop = tx_hold,
|
.start = tx_release,
|
.hangup = hangup,
|
.tiocmget = tiocmget,
|
.tiocmset = tiocmset,
|
.get_icount = get_icount,
|
.proc_show = synclinkmp_proc_show,
|
};
|
|
|
static void synclinkmp_cleanup(void)
|
{
|
int rc;
|
SLMP_INFO *info;
|
SLMP_INFO *tmp;
|
|
printk("Unloading %s %s\n", driver_name, driver_version);
|
|
if (serial_driver) {
|
rc = tty_unregister_driver(serial_driver);
|
if (rc)
|
printk("%s(%d) failed to unregister tty driver err=%d\n",
|
__FILE__,__LINE__,rc);
|
put_tty_driver(serial_driver);
|
}
|
|
/* reset devices */
|
info = synclinkmp_device_list;
|
while(info) {
|
reset_port(info);
|
info = info->next_device;
|
}
|
|
/* release devices */
|
info = synclinkmp_device_list;
|
while(info) {
|
#if SYNCLINK_GENERIC_HDLC
|
hdlcdev_exit(info);
|
#endif
|
free_dma_bufs(info);
|
free_tmp_rx_buf(info);
|
if ( info->port_num == 0 ) {
|
if (info->sca_base)
|
write_reg(info, LPR, 1); /* set low power mode */
|
release_resources(info);
|
}
|
tmp = info;
|
info = info->next_device;
|
tty_port_destroy(&tmp->port);
|
kfree(tmp);
|
}
|
|
pci_unregister_driver(&synclinkmp_pci_driver);
|
}
|
|
/* Driver initialization entry point.
|
*/
|
|
static int __init synclinkmp_init(void)
|
{
|
int rc;
|
|
if (break_on_load) {
|
synclinkmp_get_text_ptr();
|
BREAKPOINT();
|
}
|
|
printk("%s %s\n", driver_name, driver_version);
|
|
if ((rc = pci_register_driver(&synclinkmp_pci_driver)) < 0) {
|
printk("%s:failed to register PCI driver, error=%d\n",__FILE__,rc);
|
return rc;
|
}
|
|
serial_driver = alloc_tty_driver(128);
|
if (!serial_driver) {
|
rc = -ENOMEM;
|
goto error;
|
}
|
|
/* Initialize the tty_driver structure */
|
|
serial_driver->driver_name = "synclinkmp";
|
serial_driver->name = "ttySLM";
|
serial_driver->major = ttymajor;
|
serial_driver->minor_start = 64;
|
serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
|
serial_driver->subtype = SERIAL_TYPE_NORMAL;
|
serial_driver->init_termios = tty_std_termios;
|
serial_driver->init_termios.c_cflag =
|
B9600 | CS8 | CREAD | HUPCL | CLOCAL;
|
serial_driver->init_termios.c_ispeed = 9600;
|
serial_driver->init_termios.c_ospeed = 9600;
|
serial_driver->flags = TTY_DRIVER_REAL_RAW;
|
tty_set_operations(serial_driver, &ops);
|
if ((rc = tty_register_driver(serial_driver)) < 0) {
|
printk("%s(%d):Couldn't register serial driver\n",
|
__FILE__,__LINE__);
|
put_tty_driver(serial_driver);
|
serial_driver = NULL;
|
goto error;
|
}
|
|
printk("%s %s, tty major#%d\n",
|
driver_name, driver_version,
|
serial_driver->major);
|
|
return 0;
|
|
error:
|
synclinkmp_cleanup();
|
return rc;
|
}
|
|
static void __exit synclinkmp_exit(void)
|
{
|
synclinkmp_cleanup();
|
}
|
|
module_init(synclinkmp_init);
|
module_exit(synclinkmp_exit);
|
|
/* Set the port for internal loopback mode.
|
* The TxCLK and RxCLK signals are generated from the BRG and
|
* the TxD is looped back to the RxD internally.
|
*/
|
static void enable_loopback(SLMP_INFO *info, int enable)
|
{
|
if (enable) {
|
/* MD2 (Mode Register 2)
|
* 01..00 CNCT<1..0> Channel Connection 11=Local Loopback
|
*/
|
write_reg(info, MD2, (unsigned char)(read_reg(info, MD2) | (BIT1 + BIT0)));
|
|
/* degate external TxC clock source */
|
info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2));
|
write_control_reg(info);
|
|
/* RXS/TXS (Rx/Tx clock source)
|
* 07 Reserved, must be 0
|
* 06..04 Clock Source, 100=BRG
|
* 03..00 Clock Divisor, 0000=1
|
*/
|
write_reg(info, RXS, 0x40);
|
write_reg(info, TXS, 0x40);
|
|
} else {
|
/* MD2 (Mode Register 2)
|
* 01..00 CNCT<1..0> Channel connection, 0=normal
|
*/
|
write_reg(info, MD2, (unsigned char)(read_reg(info, MD2) & ~(BIT1 + BIT0)));
|
|
/* RXS/TXS (Rx/Tx clock source)
|
* 07 Reserved, must be 0
|
* 06..04 Clock Source, 000=RxC/TxC Pin
|
* 03..00 Clock Divisor, 0000=1
|
*/
|
write_reg(info, RXS, 0x00);
|
write_reg(info, TXS, 0x00);
|
}
|
|
/* set LinkSpeed if available, otherwise default to 2Mbps */
|
if (info->params.clock_speed)
|
set_rate(info, info->params.clock_speed);
|
else
|
set_rate(info, 3686400);
|
}
|
|
/* Set the baud rate register to the desired speed
|
*
|
* data_rate data rate of clock in bits per second
|
* A data rate of 0 disables the AUX clock.
|
*/
|
static void set_rate( SLMP_INFO *info, u32 data_rate )
|
{
|
u32 TMCValue;
|
unsigned char BRValue;
|
u32 Divisor=0;
|
|
/* fBRG = fCLK/(TMC * 2^BR)
|
*/
|
if (data_rate != 0) {
|
Divisor = 14745600/data_rate;
|
if (!Divisor)
|
Divisor = 1;
|
|
TMCValue = Divisor;
|
|
BRValue = 0;
|
if (TMCValue != 1 && TMCValue != 2) {
|
/* BRValue of 0 provides 50/50 duty cycle *only* when
|
* TMCValue is 1 or 2. BRValue of 1 to 9 always provides
|
* 50/50 duty cycle.
|
*/
|
BRValue = 1;
|
TMCValue >>= 1;
|
}
|
|
/* while TMCValue is too big for TMC register, divide
|
* by 2 and increment BR exponent.
|
*/
|
for(; TMCValue > 256 && BRValue < 10; BRValue++)
|
TMCValue >>= 1;
|
|
write_reg(info, TXS,
|
(unsigned char)((read_reg(info, TXS) & 0xf0) | BRValue));
|
write_reg(info, RXS,
|
(unsigned char)((read_reg(info, RXS) & 0xf0) | BRValue));
|
write_reg(info, TMC, (unsigned char)TMCValue);
|
}
|
else {
|
write_reg(info, TXS,0);
|
write_reg(info, RXS,0);
|
write_reg(info, TMC, 0);
|
}
|
}
|
|
/* Disable receiver
|
*/
|
static void rx_stop(SLMP_INFO *info)
|
{
|
if (debug_level >= DEBUG_LEVEL_ISR)
|
printk("%s(%d):%s rx_stop()\n",
|
__FILE__,__LINE__, info->device_name );
|
|
write_reg(info, CMD, RXRESET);
|
|
info->ie0_value &= ~RXRDYE;
|
write_reg(info, IE0, info->ie0_value); /* disable Rx data interrupts */
|
|
write_reg(info, RXDMA + DSR, 0); /* disable Rx DMA */
|
write_reg(info, RXDMA + DCMD, SWABORT); /* reset/init Rx DMA */
|
write_reg(info, RXDMA + DIR, 0); /* disable Rx DMA interrupts */
|
|
info->rx_enabled = false;
|
info->rx_overflow = false;
|
}
|
|
/* enable the receiver
|
*/
|
static void rx_start(SLMP_INFO *info)
|
{
|
int i;
|
|
if (debug_level >= DEBUG_LEVEL_ISR)
|
printk("%s(%d):%s rx_start()\n",
|
__FILE__,__LINE__, info->device_name );
|
|
write_reg(info, CMD, RXRESET);
|
|
if ( info->params.mode == MGSL_MODE_HDLC ) {
|
/* HDLC, disabe IRQ on rxdata */
|
info->ie0_value &= ~RXRDYE;
|
write_reg(info, IE0, info->ie0_value);
|
|
/* Reset all Rx DMA buffers and program rx dma */
|
write_reg(info, RXDMA + DSR, 0); /* disable Rx DMA */
|
write_reg(info, RXDMA + DCMD, SWABORT); /* reset/init Rx DMA */
|
|
for (i = 0; i < info->rx_buf_count; i++) {
|
info->rx_buf_list[i].status = 0xff;
|
|
// throttle to 4 shared memory writes at a time to prevent
|
// hogging local bus (keep latency time for DMA requests low).
|
if (!(i % 4))
|
read_status_reg(info);
|
}
|
info->current_rx_buf = 0;
|
|
/* set current/1st descriptor address */
|
write_reg16(info, RXDMA + CDA,
|
info->rx_buf_list_ex[0].phys_entry);
|
|
/* set new last rx descriptor address */
|
write_reg16(info, RXDMA + EDA,
|
info->rx_buf_list_ex[info->rx_buf_count - 1].phys_entry);
|
|
/* set buffer length (shared by all rx dma data buffers) */
|
write_reg16(info, RXDMA + BFL, SCABUFSIZE);
|
|
write_reg(info, RXDMA + DIR, 0x60); /* enable Rx DMA interrupts (EOM/BOF) */
|
write_reg(info, RXDMA + DSR, 0xf2); /* clear Rx DMA IRQs, enable Rx DMA */
|
} else {
|
/* async, enable IRQ on rxdata */
|
info->ie0_value |= RXRDYE;
|
write_reg(info, IE0, info->ie0_value);
|
}
|
|
write_reg(info, CMD, RXENABLE);
|
|
info->rx_overflow = false;
|
info->rx_enabled = true;
|
}
|
|
/* Enable the transmitter and send a transmit frame if
|
* one is loaded in the DMA buffers.
|
*/
|
static void tx_start(SLMP_INFO *info)
|
{
|
if (debug_level >= DEBUG_LEVEL_ISR)
|
printk("%s(%d):%s tx_start() tx_count=%d\n",
|
__FILE__,__LINE__, info->device_name,info->tx_count );
|
|
if (!info->tx_enabled ) {
|
write_reg(info, CMD, TXRESET);
|
write_reg(info, CMD, TXENABLE);
|
info->tx_enabled = true;
|
}
|
|
if ( info->tx_count ) {
|
|
/* If auto RTS enabled and RTS is inactive, then assert */
|
/* RTS and set a flag indicating that the driver should */
|
/* negate RTS when the transmission completes. */
|
|
info->drop_rts_on_tx_done = false;
|
|
if (info->params.mode != MGSL_MODE_ASYNC) {
|
|
if ( info->params.flags & HDLC_FLAG_AUTO_RTS ) {
|
get_signals( info );
|
if ( !(info->serial_signals & SerialSignal_RTS) ) {
|
info->serial_signals |= SerialSignal_RTS;
|
set_signals( info );
|
info->drop_rts_on_tx_done = true;
|
}
|
}
|
|
write_reg16(info, TRC0,
|
(unsigned short)(((tx_negate_fifo_level-1)<<8) + tx_active_fifo_level));
|
|
write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */
|
write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
|
|
/* set TX CDA (current descriptor address) */
|
write_reg16(info, TXDMA + CDA,
|
info->tx_buf_list_ex[0].phys_entry);
|
|
/* set TX EDA (last descriptor address) */
|
write_reg16(info, TXDMA + EDA,
|
info->tx_buf_list_ex[info->last_tx_buf].phys_entry);
|
|
/* enable underrun IRQ */
|
info->ie1_value &= ~IDLE;
|
info->ie1_value |= UDRN;
|
write_reg(info, IE1, info->ie1_value);
|
write_reg(info, SR1, (unsigned char)(IDLE + UDRN));
|
|
write_reg(info, TXDMA + DIR, 0x40); /* enable Tx DMA interrupts (EOM) */
|
write_reg(info, TXDMA + DSR, 0xf2); /* clear Tx DMA IRQs, enable Tx DMA */
|
|
mod_timer(&info->tx_timer, jiffies +
|
msecs_to_jiffies(5000));
|
}
|
else {
|
tx_load_fifo(info);
|
/* async, enable IRQ on txdata */
|
info->ie0_value |= TXRDYE;
|
write_reg(info, IE0, info->ie0_value);
|
}
|
|
info->tx_active = true;
|
}
|
}
|
|
/* stop the transmitter and DMA
|
*/
|
static void tx_stop( SLMP_INFO *info )
|
{
|
if (debug_level >= DEBUG_LEVEL_ISR)
|
printk("%s(%d):%s tx_stop()\n",
|
__FILE__,__LINE__, info->device_name );
|
|
del_timer(&info->tx_timer);
|
|
write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */
|
write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
|
|
write_reg(info, CMD, TXRESET);
|
|
info->ie1_value &= ~(UDRN + IDLE);
|
write_reg(info, IE1, info->ie1_value); /* disable tx status interrupts */
|
write_reg(info, SR1, (unsigned char)(IDLE + UDRN)); /* clear pending */
|
|
info->ie0_value &= ~TXRDYE;
|
write_reg(info, IE0, info->ie0_value); /* disable tx data interrupts */
|
|
info->tx_enabled = false;
|
info->tx_active = false;
|
}
|
|
/* Fill the transmit FIFO until the FIFO is full or
|
* there is no more data to load.
|
*/
|
static void tx_load_fifo(SLMP_INFO *info)
|
{
|
u8 TwoBytes[2];
|
|
/* do nothing is now tx data available and no XON/XOFF pending */
|
|
if ( !info->tx_count && !info->x_char )
|
return;
|
|
/* load the Transmit FIFO until FIFOs full or all data sent */
|
|
while( info->tx_count && (read_reg(info,SR0) & BIT1) ) {
|
|
/* there is more space in the transmit FIFO and */
|
/* there is more data in transmit buffer */
|
|
if ( (info->tx_count > 1) && !info->x_char ) {
|
/* write 16-bits */
|
TwoBytes[0] = info->tx_buf[info->tx_get++];
|
if (info->tx_get >= info->max_frame_size)
|
info->tx_get -= info->max_frame_size;
|
TwoBytes[1] = info->tx_buf[info->tx_get++];
|
if (info->tx_get >= info->max_frame_size)
|
info->tx_get -= info->max_frame_size;
|
|
write_reg16(info, TRB, *((u16 *)TwoBytes));
|
|
info->tx_count -= 2;
|
info->icount.tx += 2;
|
} else {
|
/* only 1 byte left to transmit or 1 FIFO slot left */
|
|
if (info->x_char) {
|
/* transmit pending high priority char */
|
write_reg(info, TRB, info->x_char);
|
info->x_char = 0;
|
} else {
|
write_reg(info, TRB, info->tx_buf[info->tx_get++]);
|
if (info->tx_get >= info->max_frame_size)
|
info->tx_get -= info->max_frame_size;
|
info->tx_count--;
|
}
|
info->icount.tx++;
|
}
|
}
|
}
|
|
/* Reset a port to a known state
|
*/
|
static void reset_port(SLMP_INFO *info)
|
{
|
if (info->sca_base) {
|
|
tx_stop(info);
|
rx_stop(info);
|
|
info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
|
set_signals(info);
|
|
/* disable all port interrupts */
|
info->ie0_value = 0;
|
info->ie1_value = 0;
|
info->ie2_value = 0;
|
write_reg(info, IE0, info->ie0_value);
|
write_reg(info, IE1, info->ie1_value);
|
write_reg(info, IE2, info->ie2_value);
|
|
write_reg(info, CMD, CHRESET);
|
}
|
}
|
|
/* Reset all the ports to a known state.
|
*/
|
static void reset_adapter(SLMP_INFO *info)
|
{
|
int i;
|
|
for ( i=0; i < SCA_MAX_PORTS; ++i) {
|
if (info->port_array[i])
|
reset_port(info->port_array[i]);
|
}
|
}
|
|
/* Program port for asynchronous communications.
|
*/
|
static void async_mode(SLMP_INFO *info)
|
{
|
|
unsigned char RegValue;
|
|
tx_stop(info);
|
rx_stop(info);
|
|
/* MD0, Mode Register 0
|
*
|
* 07..05 PRCTL<2..0>, Protocol Mode, 000=async
|
* 04 AUTO, Auto-enable (RTS/CTS/DCD)
|
* 03 Reserved, must be 0
|
* 02 CRCCC, CRC Calculation, 0=disabled
|
* 01..00 STOP<1..0> Stop bits (00=1,10=2)
|
*
|
* 0000 0000
|
*/
|
RegValue = 0x00;
|
if (info->params.stop_bits != 1)
|
RegValue |= BIT1;
|
write_reg(info, MD0, RegValue);
|
|
/* MD1, Mode Register 1
|
*
|
* 07..06 BRATE<1..0>, bit rate, 00=1/1 01=1/16 10=1/32 11=1/64
|
* 05..04 TXCHR<1..0>, tx char size, 00=8 bits,01=7,10=6,11=5
|
* 03..02 RXCHR<1..0>, rx char size
|
* 01..00 PMPM<1..0>, Parity mode, 00=none 10=even 11=odd
|
*
|
* 0100 0000
|
*/
|
RegValue = 0x40;
|
switch (info->params.data_bits) {
|
case 7: RegValue |= BIT4 + BIT2; break;
|
case 6: RegValue |= BIT5 + BIT3; break;
|
case 5: RegValue |= BIT5 + BIT4 + BIT3 + BIT2; break;
|
}
|
if (info->params.parity != ASYNC_PARITY_NONE) {
|
RegValue |= BIT1;
|
if (info->params.parity == ASYNC_PARITY_ODD)
|
RegValue |= BIT0;
|
}
|
write_reg(info, MD1, RegValue);
|
|
/* MD2, Mode Register 2
|
*
|
* 07..02 Reserved, must be 0
|
* 01..00 CNCT<1..0> Channel connection, 00=normal 11=local loopback
|
*
|
* 0000 0000
|
*/
|
RegValue = 0x00;
|
if (info->params.loopback)
|
RegValue |= (BIT1 + BIT0);
|
write_reg(info, MD2, RegValue);
|
|
/* RXS, Receive clock source
|
*
|
* 07 Reserved, must be 0
|
* 06..04 RXCS<2..0>, clock source, 000=RxC Pin, 100=BRG, 110=DPLL
|
* 03..00 RXBR<3..0>, rate divisor, 0000=1
|
*/
|
RegValue=BIT6;
|
write_reg(info, RXS, RegValue);
|
|
/* TXS, Transmit clock source
|
*
|
* 07 Reserved, must be 0
|
* 06..04 RXCS<2..0>, clock source, 000=TxC Pin, 100=BRG, 110=Receive Clock
|
* 03..00 RXBR<3..0>, rate divisor, 0000=1
|
*/
|
RegValue=BIT6;
|
write_reg(info, TXS, RegValue);
|
|
/* Control Register
|
*
|
* 6,4,2,0 CLKSEL<3..0>, 0 = TcCLK in, 1 = Auxclk out
|
*/
|
info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2));
|
write_control_reg(info);
|
|
tx_set_idle(info);
|
|
/* RRC Receive Ready Control 0
|
*
|
* 07..05 Reserved, must be 0
|
* 04..00 RRC<4..0> Rx FIFO trigger active 0x00 = 1 byte
|
*/
|
write_reg(info, RRC, 0x00);
|
|
/* TRC0 Transmit Ready Control 0
|
*
|
* 07..05 Reserved, must be 0
|
* 04..00 TRC<4..0> Tx FIFO trigger active 0x10 = 16 bytes
|
*/
|
write_reg(info, TRC0, 0x10);
|
|
/* TRC1 Transmit Ready Control 1
|
*
|
* 07..05 Reserved, must be 0
|
* 04..00 TRC<4..0> Tx FIFO trigger inactive 0x1e = 31 bytes (full-1)
|
*/
|
write_reg(info, TRC1, 0x1e);
|
|
/* CTL, MSCI control register
|
*
|
* 07..06 Reserved, set to 0
|
* 05 UDRNC, underrun control, 0=abort 1=CRC+flag (HDLC/BSC)
|
* 04 IDLC, idle control, 0=mark 1=idle register
|
* 03 BRK, break, 0=off 1 =on (async)
|
* 02 SYNCLD, sync char load enable (BSC) 1=enabled
|
* 01 GOP, go active on poll (LOOP mode) 1=enabled
|
* 00 RTS, RTS output control, 0=active 1=inactive
|
*
|
* 0001 0001
|
*/
|
RegValue = 0x10;
|
if (!(info->serial_signals & SerialSignal_RTS))
|
RegValue |= 0x01;
|
write_reg(info, CTL, RegValue);
|
|
/* enable status interrupts */
|
info->ie0_value |= TXINTE + RXINTE;
|
write_reg(info, IE0, info->ie0_value);
|
|
/* enable break detect interrupt */
|
info->ie1_value = BRKD;
|
write_reg(info, IE1, info->ie1_value);
|
|
/* enable rx overrun interrupt */
|
info->ie2_value = OVRN;
|
write_reg(info, IE2, info->ie2_value);
|
|
set_rate( info, info->params.data_rate * 16 );
|
}
|
|
/* Program the SCA for HDLC communications.
|
*/
|
static void hdlc_mode(SLMP_INFO *info)
|
{
|
unsigned char RegValue;
|
u32 DpllDivisor;
|
|
// Can't use DPLL because SCA outputs recovered clock on RxC when
|
// DPLL mode selected. This causes output contention with RxC receiver.
|
// Use of DPLL would require external hardware to disable RxC receiver
|
// when DPLL mode selected.
|
info->params.flags &= ~(HDLC_FLAG_TXC_DPLL + HDLC_FLAG_RXC_DPLL);
|
|
/* disable DMA interrupts */
|
write_reg(info, TXDMA + DIR, 0);
|
write_reg(info, RXDMA + DIR, 0);
|
|
/* MD0, Mode Register 0
|
*
|
* 07..05 PRCTL<2..0>, Protocol Mode, 100=HDLC
|
* 04 AUTO, Auto-enable (RTS/CTS/DCD)
|
* 03 Reserved, must be 0
|
* 02 CRCCC, CRC Calculation, 1=enabled
|
* 01 CRC1, CRC selection, 0=CRC-16,1=CRC-CCITT-16
|
* 00 CRC0, CRC initial value, 1 = all 1s
|
*
|
* 1000 0001
|
*/
|
RegValue = 0x81;
|
if (info->params.flags & HDLC_FLAG_AUTO_CTS)
|
RegValue |= BIT4;
|
if (info->params.flags & HDLC_FLAG_AUTO_DCD)
|
RegValue |= BIT4;
|
if (info->params.crc_type == HDLC_CRC_16_CCITT)
|
RegValue |= BIT2 + BIT1;
|
write_reg(info, MD0, RegValue);
|
|
/* MD1, Mode Register 1
|
*
|
* 07..06 ADDRS<1..0>, Address detect, 00=no addr check
|
* 05..04 TXCHR<1..0>, tx char size, 00=8 bits
|
* 03..02 RXCHR<1..0>, rx char size, 00=8 bits
|
* 01..00 PMPM<1..0>, Parity mode, 00=no parity
|
*
|
* 0000 0000
|
*/
|
RegValue = 0x00;
|
write_reg(info, MD1, RegValue);
|
|
/* MD2, Mode Register 2
|
*
|
* 07 NRZFM, 0=NRZ, 1=FM
|
* 06..05 CODE<1..0> Encoding, 00=NRZ
|
* 04..03 DRATE<1..0> DPLL Divisor, 00=8
|
* 02 Reserved, must be 0
|
* 01..00 CNCT<1..0> Channel connection, 0=normal
|
*
|
* 0000 0000
|
*/
|
RegValue = 0x00;
|
switch(info->params.encoding) {
|
case HDLC_ENCODING_NRZI: RegValue |= BIT5; break;
|
case HDLC_ENCODING_BIPHASE_MARK: RegValue |= BIT7 + BIT5; break; /* aka FM1 */
|
case HDLC_ENCODING_BIPHASE_SPACE: RegValue |= BIT7 + BIT6; break; /* aka FM0 */
|
case HDLC_ENCODING_BIPHASE_LEVEL: RegValue |= BIT7; break; /* aka Manchester */
|
#if 0
|
case HDLC_ENCODING_NRZB: /* not supported */
|
case HDLC_ENCODING_NRZI_MARK: /* not supported */
|
case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: /* not supported */
|
#endif
|
}
|
if ( info->params.flags & HDLC_FLAG_DPLL_DIV16 ) {
|
DpllDivisor = 16;
|
RegValue |= BIT3;
|
} else if ( info->params.flags & HDLC_FLAG_DPLL_DIV8 ) {
|
DpllDivisor = 8;
|
} else {
|
DpllDivisor = 32;
|
RegValue |= BIT4;
|
}
|
write_reg(info, MD2, RegValue);
|
|
|
/* RXS, Receive clock source
|
*
|
* 07 Reserved, must be 0
|
* 06..04 RXCS<2..0>, clock source, 000=RxC Pin, 100=BRG, 110=DPLL
|
* 03..00 RXBR<3..0>, rate divisor, 0000=1
|
*/
|
RegValue=0;
|
if (info->params.flags & HDLC_FLAG_RXC_BRG)
|
RegValue |= BIT6;
|
if (info->params.flags & HDLC_FLAG_RXC_DPLL)
|
RegValue |= BIT6 + BIT5;
|
write_reg(info, RXS, RegValue);
|
|
/* TXS, Transmit clock source
|
*
|
* 07 Reserved, must be 0
|
* 06..04 RXCS<2..0>, clock source, 000=TxC Pin, 100=BRG, 110=Receive Clock
|
* 03..00 RXBR<3..0>, rate divisor, 0000=1
|
*/
|
RegValue=0;
|
if (info->params.flags & HDLC_FLAG_TXC_BRG)
|
RegValue |= BIT6;
|
if (info->params.flags & HDLC_FLAG_TXC_DPLL)
|
RegValue |= BIT6 + BIT5;
|
write_reg(info, TXS, RegValue);
|
|
if (info->params.flags & HDLC_FLAG_RXC_DPLL)
|
set_rate(info, info->params.clock_speed * DpllDivisor);
|
else
|
set_rate(info, info->params.clock_speed);
|
|
/* GPDATA (General Purpose I/O Data Register)
|
*
|
* 6,4,2,0 CLKSEL<3..0>, 0 = TcCLK in, 1 = Auxclk out
|
*/
|
if (info->params.flags & HDLC_FLAG_TXC_BRG)
|
info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2));
|
else
|
info->port_array[0]->ctrlreg_value &= ~(BIT0 << (info->port_num * 2));
|
write_control_reg(info);
|
|
/* RRC Receive Ready Control 0
|
*
|
* 07..05 Reserved, must be 0
|
* 04..00 RRC<4..0> Rx FIFO trigger active
|
*/
|
write_reg(info, RRC, rx_active_fifo_level);
|
|
/* TRC0 Transmit Ready Control 0
|
*
|
* 07..05 Reserved, must be 0
|
* 04..00 TRC<4..0> Tx FIFO trigger active
|
*/
|
write_reg(info, TRC0, tx_active_fifo_level);
|
|
/* TRC1 Transmit Ready Control 1
|
*
|
* 07..05 Reserved, must be 0
|
* 04..00 TRC<4..0> Tx FIFO trigger inactive 0x1f = 32 bytes (full)
|
*/
|
write_reg(info, TRC1, (unsigned char)(tx_negate_fifo_level - 1));
|
|
/* DMR, DMA Mode Register
|
*
|
* 07..05 Reserved, must be 0
|
* 04 TMOD, Transfer Mode: 1=chained-block
|
* 03 Reserved, must be 0
|
* 02 NF, Number of Frames: 1=multi-frame
|
* 01 CNTE, Frame End IRQ Counter enable: 0=disabled
|
* 00 Reserved, must be 0
|
*
|
* 0001 0100
|
*/
|
write_reg(info, TXDMA + DMR, 0x14);
|
write_reg(info, RXDMA + DMR, 0x14);
|
|
/* Set chain pointer base (upper 8 bits of 24 bit addr) */
|
write_reg(info, RXDMA + CPB,
|
(unsigned char)(info->buffer_list_phys >> 16));
|
|
/* Set chain pointer base (upper 8 bits of 24 bit addr) */
|
write_reg(info, TXDMA + CPB,
|
(unsigned char)(info->buffer_list_phys >> 16));
|
|
/* enable status interrupts. other code enables/disables
|
* the individual sources for these two interrupt classes.
|
*/
|
info->ie0_value |= TXINTE + RXINTE;
|
write_reg(info, IE0, info->ie0_value);
|
|
/* CTL, MSCI control register
|
*
|
* 07..06 Reserved, set to 0
|
* 05 UDRNC, underrun control, 0=abort 1=CRC+flag (HDLC/BSC)
|
* 04 IDLC, idle control, 0=mark 1=idle register
|
* 03 BRK, break, 0=off 1 =on (async)
|
* 02 SYNCLD, sync char load enable (BSC) 1=enabled
|
* 01 GOP, go active on poll (LOOP mode) 1=enabled
|
* 00 RTS, RTS output control, 0=active 1=inactive
|
*
|
* 0001 0001
|
*/
|
RegValue = 0x10;
|
if (!(info->serial_signals & SerialSignal_RTS))
|
RegValue |= 0x01;
|
write_reg(info, CTL, RegValue);
|
|
/* preamble not supported ! */
|
|
tx_set_idle(info);
|
tx_stop(info);
|
rx_stop(info);
|
|
set_rate(info, info->params.clock_speed);
|
|
if (info->params.loopback)
|
enable_loopback(info,1);
|
}
|
|
/* Set the transmit HDLC idle mode
|
*/
|
static void tx_set_idle(SLMP_INFO *info)
|
{
|
unsigned char RegValue = 0xff;
|
|
/* Map API idle mode to SCA register bits */
|
switch(info->idle_mode) {
|
case HDLC_TXIDLE_FLAGS: RegValue = 0x7e; break;
|
case HDLC_TXIDLE_ALT_ZEROS_ONES: RegValue = 0xaa; break;
|
case HDLC_TXIDLE_ZEROS: RegValue = 0x00; break;
|
case HDLC_TXIDLE_ONES: RegValue = 0xff; break;
|
case HDLC_TXIDLE_ALT_MARK_SPACE: RegValue = 0xaa; break;
|
case HDLC_TXIDLE_SPACE: RegValue = 0x00; break;
|
case HDLC_TXIDLE_MARK: RegValue = 0xff; break;
|
}
|
|
write_reg(info, IDL, RegValue);
|
}
|
|
/* Query the adapter for the state of the V24 status (input) signals.
|
*/
|
static void get_signals(SLMP_INFO *info)
|
{
|
u16 status = read_reg(info, SR3);
|
u16 gpstatus = read_status_reg(info);
|
u16 testbit;
|
|
/* clear all serial signals except RTS and DTR */
|
info->serial_signals &= SerialSignal_RTS | SerialSignal_DTR;
|
|
/* set serial signal bits to reflect MISR */
|
|
if (!(status & BIT3))
|
info->serial_signals |= SerialSignal_CTS;
|
|
if ( !(status & BIT2))
|
info->serial_signals |= SerialSignal_DCD;
|
|
testbit = BIT1 << (info->port_num * 2); // Port 0..3 RI is GPDATA<1,3,5,7>
|
if (!(gpstatus & testbit))
|
info->serial_signals |= SerialSignal_RI;
|
|
testbit = BIT0 << (info->port_num * 2); // Port 0..3 DSR is GPDATA<0,2,4,6>
|
if (!(gpstatus & testbit))
|
info->serial_signals |= SerialSignal_DSR;
|
}
|
|
/* Set the state of RTS and DTR based on contents of
|
* serial_signals member of device context.
|
*/
|
static void set_signals(SLMP_INFO *info)
|
{
|
unsigned char RegValue;
|
u16 EnableBit;
|
|
RegValue = read_reg(info, CTL);
|
if (info->serial_signals & SerialSignal_RTS)
|
RegValue &= ~BIT0;
|
else
|
RegValue |= BIT0;
|
write_reg(info, CTL, RegValue);
|
|
// Port 0..3 DTR is ctrl reg <1,3,5,7>
|
EnableBit = BIT1 << (info->port_num*2);
|
if (info->serial_signals & SerialSignal_DTR)
|
info->port_array[0]->ctrlreg_value &= ~EnableBit;
|
else
|
info->port_array[0]->ctrlreg_value |= EnableBit;
|
write_control_reg(info);
|
}
|
|
/*******************/
|
/* DMA Buffer Code */
|
/*******************/
|
|
/* Set the count for all receive buffers to SCABUFSIZE
|
* and set the current buffer to the first buffer. This effectively
|
* makes all buffers free and discards any data in buffers.
|
*/
|
static void rx_reset_buffers(SLMP_INFO *info)
|
{
|
rx_free_frame_buffers(info, 0, info->rx_buf_count - 1);
|
}
|
|
/* Free the buffers used by a received frame
|
*
|
* info pointer to device instance data
|
* first index of 1st receive buffer of frame
|
* last index of last receive buffer of frame
|
*/
|
static void rx_free_frame_buffers(SLMP_INFO *info, unsigned int first, unsigned int last)
|
{
|
bool done = false;
|
|
while(!done) {
|
/* reset current buffer for reuse */
|
info->rx_buf_list[first].status = 0xff;
|
|
if (first == last) {
|
done = true;
|
/* set new last rx descriptor address */
|
write_reg16(info, RXDMA + EDA, info->rx_buf_list_ex[first].phys_entry);
|
}
|
|
first++;
|
if (first == info->rx_buf_count)
|
first = 0;
|
}
|
|
/* set current buffer to next buffer after last buffer of frame */
|
info->current_rx_buf = first;
|
}
|
|
/* Return a received frame from the receive DMA buffers.
|
* Only frames received without errors are returned.
|
*
|
* Return Value: true if frame returned, otherwise false
|
*/
|
static bool rx_get_frame(SLMP_INFO *info)
|
{
|
unsigned int StartIndex, EndIndex; /* index of 1st and last buffers of Rx frame */
|
unsigned short status;
|
unsigned int framesize = 0;
|
bool ReturnCode = false;
|
unsigned long flags;
|
struct tty_struct *tty = info->port.tty;
|
unsigned char addr_field = 0xff;
|
SCADESC *desc;
|
SCADESC_EX *desc_ex;
|
|
CheckAgain:
|
/* assume no frame returned, set zero length */
|
framesize = 0;
|
addr_field = 0xff;
|
|
/*
|
* current_rx_buf points to the 1st buffer of the next available
|
* receive frame. To find the last buffer of the frame look for
|
* a non-zero status field in the buffer entries. (The status
|
* field is set by the 16C32 after completing a receive frame.
|
*/
|
StartIndex = EndIndex = info->current_rx_buf;
|
|
for ( ;; ) {
|
desc = &info->rx_buf_list[EndIndex];
|
desc_ex = &info->rx_buf_list_ex[EndIndex];
|
|
if (desc->status == 0xff)
|
goto Cleanup; /* current desc still in use, no frames available */
|
|
if (framesize == 0 && info->params.addr_filter != 0xff)
|
addr_field = desc_ex->virt_addr[0];
|
|
framesize += desc->length;
|
|
/* Status != 0 means last buffer of frame */
|
if (desc->status)
|
break;
|
|
EndIndex++;
|
if (EndIndex == info->rx_buf_count)
|
EndIndex = 0;
|
|
if (EndIndex == info->current_rx_buf) {
|
/* all buffers have been 'used' but none mark */
|
/* the end of a frame. Reset buffers and receiver. */
|
if ( info->rx_enabled ){
|
spin_lock_irqsave(&info->lock,flags);
|
rx_start(info);
|
spin_unlock_irqrestore(&info->lock,flags);
|
}
|
goto Cleanup;
|
}
|
|
}
|
|
/* check status of receive frame */
|
|
/* frame status is byte stored after frame data
|
*
|
* 7 EOM (end of msg), 1 = last buffer of frame
|
* 6 Short Frame, 1 = short frame
|
* 5 Abort, 1 = frame aborted
|
* 4 Residue, 1 = last byte is partial
|
* 3 Overrun, 1 = overrun occurred during frame reception
|
* 2 CRC, 1 = CRC error detected
|
*
|
*/
|
status = desc->status;
|
|
/* ignore CRC bit if not using CRC (bit is undefined) */
|
/* Note:CRC is not save to data buffer */
|
if (info->params.crc_type == HDLC_CRC_NONE)
|
status &= ~BIT2;
|
|
if (framesize == 0 ||
|
(addr_field != 0xff && addr_field != info->params.addr_filter)) {
|
/* discard 0 byte frames, this seems to occur sometime
|
* when remote is idling flags.
|
*/
|
rx_free_frame_buffers(info, StartIndex, EndIndex);
|
goto CheckAgain;
|
}
|
|
if (framesize < 2)
|
status |= BIT6;
|
|
if (status & (BIT6+BIT5+BIT3+BIT2)) {
|
/* received frame has errors,
|
* update counts and mark frame size as 0
|
*/
|
if (status & BIT6)
|
info->icount.rxshort++;
|
else if (status & BIT5)
|
info->icount.rxabort++;
|
else if (status & BIT3)
|
info->icount.rxover++;
|
else
|
info->icount.rxcrc++;
|
|
framesize = 0;
|
#if SYNCLINK_GENERIC_HDLC
|
{
|
info->netdev->stats.rx_errors++;
|
info->netdev->stats.rx_frame_errors++;
|
}
|
#endif
|
}
|
|
if ( debug_level >= DEBUG_LEVEL_BH )
|
printk("%s(%d):%s rx_get_frame() status=%04X size=%d\n",
|
__FILE__,__LINE__,info->device_name,status,framesize);
|
|
if ( debug_level >= DEBUG_LEVEL_DATA )
|
trace_block(info,info->rx_buf_list_ex[StartIndex].virt_addr,
|
min_t(unsigned int, framesize, SCABUFSIZE), 0);
|
|
if (framesize) {
|
if (framesize > info->max_frame_size)
|
info->icount.rxlong++;
|
else {
|
/* copy dma buffer(s) to contiguous intermediate buffer */
|
int copy_count = framesize;
|
int index = StartIndex;
|
unsigned char *ptmp = info->tmp_rx_buf;
|
info->tmp_rx_buf_count = framesize;
|
|
info->icount.rxok++;
|
|
while(copy_count) {
|
int partial_count = min(copy_count,SCABUFSIZE);
|
memcpy( ptmp,
|
info->rx_buf_list_ex[index].virt_addr,
|
partial_count );
|
ptmp += partial_count;
|
copy_count -= partial_count;
|
|
if ( ++index == info->rx_buf_count )
|
index = 0;
|
}
|
|
#if SYNCLINK_GENERIC_HDLC
|
if (info->netcount)
|
hdlcdev_rx(info,info->tmp_rx_buf,framesize);
|
else
|
#endif
|
ldisc_receive_buf(tty,info->tmp_rx_buf,
|
info->flag_buf, framesize);
|
}
|
}
|
/* Free the buffers used by this frame. */
|
rx_free_frame_buffers( info, StartIndex, EndIndex );
|
|
ReturnCode = true;
|
|
Cleanup:
|
if ( info->rx_enabled && info->rx_overflow ) {
|
/* Receiver is enabled, but needs to restarted due to
|
* rx buffer overflow. If buffers are empty, restart receiver.
|
*/
|
if (info->rx_buf_list[EndIndex].status == 0xff) {
|
spin_lock_irqsave(&info->lock,flags);
|
rx_start(info);
|
spin_unlock_irqrestore(&info->lock,flags);
|
}
|
}
|
|
return ReturnCode;
|
}
|
|
/* load the transmit DMA buffer with data
|
*/
|
static void tx_load_dma_buffer(SLMP_INFO *info, const char *buf, unsigned int count)
|
{
|
unsigned short copy_count;
|
unsigned int i = 0;
|
SCADESC *desc;
|
SCADESC_EX *desc_ex;
|
|
if ( debug_level >= DEBUG_LEVEL_DATA )
|
trace_block(info, buf, min_t(unsigned int, count, SCABUFSIZE), 1);
|
|
/* Copy source buffer to one or more DMA buffers, starting with
|
* the first transmit dma buffer.
|
*/
|
for(i=0;;)
|
{
|
copy_count = min_t(unsigned int, count, SCABUFSIZE);
|
|
desc = &info->tx_buf_list[i];
|
desc_ex = &info->tx_buf_list_ex[i];
|
|
load_pci_memory(info, desc_ex->virt_addr,buf,copy_count);
|
|
desc->length = copy_count;
|
desc->status = 0;
|
|
buf += copy_count;
|
count -= copy_count;
|
|
if (!count)
|
break;
|
|
i++;
|
if (i >= info->tx_buf_count)
|
i = 0;
|
}
|
|
info->tx_buf_list[i].status = 0x81; /* set EOM and EOT status */
|
info->last_tx_buf = ++i;
|
}
|
|
static bool register_test(SLMP_INFO *info)
|
{
|
static unsigned char testval[] = {0x00, 0xff, 0xaa, 0x55, 0x69, 0x96};
|
static unsigned int count = ARRAY_SIZE(testval);
|
unsigned int i;
|
bool rc = true;
|
unsigned long flags;
|
|
spin_lock_irqsave(&info->lock,flags);
|
reset_port(info);
|
|
/* assume failure */
|
info->init_error = DiagStatus_AddressFailure;
|
|
/* Write bit patterns to various registers but do it out of */
|
/* sync, then read back and verify values. */
|
|
for (i = 0 ; i < count ; i++) {
|
write_reg(info, TMC, testval[i]);
|
write_reg(info, IDL, testval[(i+1)%count]);
|
write_reg(info, SA0, testval[(i+2)%count]);
|
write_reg(info, SA1, testval[(i+3)%count]);
|
|
if ( (read_reg(info, TMC) != testval[i]) ||
|
(read_reg(info, IDL) != testval[(i+1)%count]) ||
|
(read_reg(info, SA0) != testval[(i+2)%count]) ||
|
(read_reg(info, SA1) != testval[(i+3)%count]) )
|
{
|
rc = false;
|
break;
|
}
|
}
|
|
reset_port(info);
|
spin_unlock_irqrestore(&info->lock,flags);
|
|
return rc;
|
}
|
|
static bool irq_test(SLMP_INFO *info)
|
{
|
unsigned long timeout;
|
unsigned long flags;
|
|
unsigned char timer = (info->port_num & 1) ? TIMER2 : TIMER0;
|
|
spin_lock_irqsave(&info->lock,flags);
|
reset_port(info);
|
|
/* assume failure */
|
info->init_error = DiagStatus_IrqFailure;
|
info->irq_occurred = false;
|
|
/* setup timer0 on SCA0 to interrupt */
|
|
/* IER2<7..4> = timer<3..0> interrupt enables (1=enabled) */
|
write_reg(info, IER2, (unsigned char)((info->port_num & 1) ? BIT6 : BIT4));
|
|
write_reg(info, (unsigned char)(timer + TEPR), 0); /* timer expand prescale */
|
write_reg16(info, (unsigned char)(timer + TCONR), 1); /* timer constant */
|
|
|
/* TMCS, Timer Control/Status Register
|
*
|
* 07 CMF, Compare match flag (read only) 1=match
|
* 06 ECMI, CMF Interrupt Enable: 1=enabled
|
* 05 Reserved, must be 0
|
* 04 TME, Timer Enable
|
* 03..00 Reserved, must be 0
|
*
|
* 0101 0000
|
*/
|
write_reg(info, (unsigned char)(timer + TMCS), 0x50);
|
|
spin_unlock_irqrestore(&info->lock,flags);
|
|
timeout=100;
|
while( timeout-- && !info->irq_occurred ) {
|
msleep_interruptible(10);
|
}
|
|
spin_lock_irqsave(&info->lock,flags);
|
reset_port(info);
|
spin_unlock_irqrestore(&info->lock,flags);
|
|
return info->irq_occurred;
|
}
|
|
/* initialize individual SCA device (2 ports)
|
*/
|
static bool sca_init(SLMP_INFO *info)
|
{
|
/* set wait controller to single mem partition (low), no wait states */
|
write_reg(info, PABR0, 0); /* wait controller addr boundary 0 */
|
write_reg(info, PABR1, 0); /* wait controller addr boundary 1 */
|
write_reg(info, WCRL, 0); /* wait controller low range */
|
write_reg(info, WCRM, 0); /* wait controller mid range */
|
write_reg(info, WCRH, 0); /* wait controller high range */
|
|
/* DPCR, DMA Priority Control
|
*
|
* 07..05 Not used, must be 0
|
* 04 BRC, bus release condition: 0=all transfers complete
|
* 03 CCC, channel change condition: 0=every cycle
|
* 02..00 PR<2..0>, priority 100=round robin
|
*
|
* 00000100 = 0x04
|
*/
|
write_reg(info, DPCR, dma_priority);
|
|
/* DMA Master Enable, BIT7: 1=enable all channels */
|
write_reg(info, DMER, 0x80);
|
|
/* enable all interrupt classes */
|
write_reg(info, IER0, 0xff); /* TxRDY,RxRDY,TxINT,RxINT (ports 0-1) */
|
write_reg(info, IER1, 0xff); /* DMIB,DMIA (channels 0-3) */
|
write_reg(info, IER2, 0xf0); /* TIRQ (timers 0-3) */
|
|
/* ITCR, interrupt control register
|
* 07 IPC, interrupt priority, 0=MSCI->DMA
|
* 06..05 IAK<1..0>, Acknowledge cycle, 00=non-ack cycle
|
* 04 VOS, Vector Output, 0=unmodified vector
|
* 03..00 Reserved, must be 0
|
*/
|
write_reg(info, ITCR, 0);
|
|
return true;
|
}
|
|
/* initialize adapter hardware
|
*/
|
static bool init_adapter(SLMP_INFO *info)
|
{
|
int i;
|
|
/* Set BIT30 of Local Control Reg 0x50 to reset SCA */
|
volatile u32 *MiscCtrl = (u32 *)(info->lcr_base + 0x50);
|
u32 readval;
|
|
info->misc_ctrl_value |= BIT30;
|
*MiscCtrl = info->misc_ctrl_value;
|
|
/*
|
* Force at least 170ns delay before clearing
|
* reset bit. Each read from LCR takes at least
|
* 30ns so 10 times for 300ns to be safe.
|
*/
|
for(i=0;i<10;i++)
|
readval = *MiscCtrl;
|
|
info->misc_ctrl_value &= ~BIT30;
|
*MiscCtrl = info->misc_ctrl_value;
|
|
/* init control reg (all DTRs off, all clksel=input) */
|
info->ctrlreg_value = 0xaa;
|
write_control_reg(info);
|
|
{
|
volatile u32 *LCR1BRDR = (u32 *)(info->lcr_base + 0x2c);
|
lcr1_brdr_value &= ~(BIT5 + BIT4 + BIT3);
|
|
switch(read_ahead_count)
|
{
|
case 16:
|
lcr1_brdr_value |= BIT5 + BIT4 + BIT3;
|
break;
|
case 8:
|
lcr1_brdr_value |= BIT5 + BIT4;
|
break;
|
case 4:
|
lcr1_brdr_value |= BIT5 + BIT3;
|
break;
|
case 0:
|
lcr1_brdr_value |= BIT5;
|
break;
|
}
|
|
*LCR1BRDR = lcr1_brdr_value;
|
*MiscCtrl = misc_ctrl_value;
|
}
|
|
sca_init(info->port_array[0]);
|
sca_init(info->port_array[2]);
|
|
return true;
|
}
|
|
/* Loopback an HDLC frame to test the hardware
|
* interrupt and DMA functions.
|
*/
|
static bool loopback_test(SLMP_INFO *info)
|
{
|
#define TESTFRAMESIZE 20
|
|
unsigned long timeout;
|
u16 count = TESTFRAMESIZE;
|
unsigned char buf[TESTFRAMESIZE];
|
bool rc = false;
|
unsigned long flags;
|
|
struct tty_struct *oldtty = info->port.tty;
|
u32 speed = info->params.clock_speed;
|
|
info->params.clock_speed = 3686400;
|
info->port.tty = NULL;
|
|
/* assume failure */
|
info->init_error = DiagStatus_DmaFailure;
|
|
/* build and send transmit frame */
|
for (count = 0; count < TESTFRAMESIZE;++count)
|
buf[count] = (unsigned char)count;
|
|
memset(info->tmp_rx_buf,0,TESTFRAMESIZE);
|
|
/* program hardware for HDLC and enabled receiver */
|
spin_lock_irqsave(&info->lock,flags);
|
hdlc_mode(info);
|
enable_loopback(info,1);
|
rx_start(info);
|
info->tx_count = count;
|
tx_load_dma_buffer(info,buf,count);
|
tx_start(info);
|
spin_unlock_irqrestore(&info->lock,flags);
|
|
/* wait for receive complete */
|
/* Set a timeout for waiting for interrupt. */
|
for ( timeout = 100; timeout; --timeout ) {
|
msleep_interruptible(10);
|
|
if (rx_get_frame(info)) {
|
rc = true;
|
break;
|
}
|
}
|
|
/* verify received frame length and contents */
|
if (rc &&
|
( info->tmp_rx_buf_count != count ||
|
memcmp(buf, info->tmp_rx_buf,count))) {
|
rc = false;
|
}
|
|
spin_lock_irqsave(&info->lock,flags);
|
reset_adapter(info);
|
spin_unlock_irqrestore(&info->lock,flags);
|
|
info->params.clock_speed = speed;
|
info->port.tty = oldtty;
|
|
return rc;
|
}
|
|
/* Perform diagnostics on hardware
|
*/
|
static int adapter_test( SLMP_INFO *info )
|
{
|
unsigned long flags;
|
if ( debug_level >= DEBUG_LEVEL_INFO )
|
printk( "%s(%d):Testing device %s\n",
|
__FILE__,__LINE__,info->device_name );
|
|
spin_lock_irqsave(&info->lock,flags);
|
init_adapter(info);
|
spin_unlock_irqrestore(&info->lock,flags);
|
|
info->port_array[0]->port_count = 0;
|
|
if ( register_test(info->port_array[0]) &&
|
register_test(info->port_array[1])) {
|
|
info->port_array[0]->port_count = 2;
|
|
if ( register_test(info->port_array[2]) &&
|
register_test(info->port_array[3]) )
|
info->port_array[0]->port_count += 2;
|
}
|
else {
|
printk( "%s(%d):Register test failure for device %s Addr=%08lX\n",
|
__FILE__,__LINE__,info->device_name, (unsigned long)(info->phys_sca_base));
|
return -ENODEV;
|
}
|
|
if ( !irq_test(info->port_array[0]) ||
|
!irq_test(info->port_array[1]) ||
|
(info->port_count == 4 && !irq_test(info->port_array[2])) ||
|
(info->port_count == 4 && !irq_test(info->port_array[3]))) {
|
printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n",
|
__FILE__,__LINE__,info->device_name, (unsigned short)(info->irq_level) );
|
return -ENODEV;
|
}
|
|
if (!loopback_test(info->port_array[0]) ||
|
!loopback_test(info->port_array[1]) ||
|
(info->port_count == 4 && !loopback_test(info->port_array[2])) ||
|
(info->port_count == 4 && !loopback_test(info->port_array[3]))) {
|
printk( "%s(%d):DMA test failure for device %s\n",
|
__FILE__,__LINE__,info->device_name);
|
return -ENODEV;
|
}
|
|
if ( debug_level >= DEBUG_LEVEL_INFO )
|
printk( "%s(%d):device %s passed diagnostics\n",
|
__FILE__,__LINE__,info->device_name );
|
|
info->port_array[0]->init_error = 0;
|
info->port_array[1]->init_error = 0;
|
if ( info->port_count > 2 ) {
|
info->port_array[2]->init_error = 0;
|
info->port_array[3]->init_error = 0;
|
}
|
|
return 0;
|
}
|
|
/* Test the shared memory on a PCI adapter.
|
*/
|
static bool memory_test(SLMP_INFO *info)
|
{
|
static unsigned long testval[] = { 0x0, 0x55555555, 0xaaaaaaaa,
|
0x66666666, 0x99999999, 0xffffffff, 0x12345678 };
|
unsigned long count = ARRAY_SIZE(testval);
|
unsigned long i;
|
unsigned long limit = SCA_MEM_SIZE/sizeof(unsigned long);
|
unsigned long * addr = (unsigned long *)info->memory_base;
|
|
/* Test data lines with test pattern at one location. */
|
|
for ( i = 0 ; i < count ; i++ ) {
|
*addr = testval[i];
|
if ( *addr != testval[i] )
|
return false;
|
}
|
|
/* Test address lines with incrementing pattern over */
|
/* entire address range. */
|
|
for ( i = 0 ; i < limit ; i++ ) {
|
*addr = i * 4;
|
addr++;
|
}
|
|
addr = (unsigned long *)info->memory_base;
|
|
for ( i = 0 ; i < limit ; i++ ) {
|
if ( *addr != i * 4 )
|
return false;
|
addr++;
|
}
|
|
memset( info->memory_base, 0, SCA_MEM_SIZE );
|
return true;
|
}
|
|
/* Load data into PCI adapter shared memory.
|
*
|
* The PCI9050 releases control of the local bus
|
* after completing the current read or write operation.
|
*
|
* While the PCI9050 write FIFO not empty, the
|
* PCI9050 treats all of the writes as a single transaction
|
* and does not release the bus. This causes DMA latency problems
|
* at high speeds when copying large data blocks to the shared memory.
|
*
|
* This function breaks a write into multiple transations by
|
* interleaving a read which flushes the write FIFO and 'completes'
|
* the write transation. This allows any pending DMA request to gain control
|
* of the local bus in a timely fasion.
|
*/
|
static void load_pci_memory(SLMP_INFO *info, char* dest, const char* src, unsigned short count)
|
{
|
/* A load interval of 16 allows for 4 32-bit writes at */
|
/* 136ns each for a maximum latency of 542ns on the local bus.*/
|
|
unsigned short interval = count / sca_pci_load_interval;
|
unsigned short i;
|
|
for ( i = 0 ; i < interval ; i++ )
|
{
|
memcpy(dest, src, sca_pci_load_interval);
|
read_status_reg(info);
|
dest += sca_pci_load_interval;
|
src += sca_pci_load_interval;
|
}
|
|
memcpy(dest, src, count % sca_pci_load_interval);
|
}
|
|
static void trace_block(SLMP_INFO *info,const char* data, int count, int xmit)
|
{
|
int i;
|
int linecount;
|
if (xmit)
|
printk("%s tx data:\n",info->device_name);
|
else
|
printk("%s rx data:\n",info->device_name);
|
|
while(count) {
|
if (count > 16)
|
linecount = 16;
|
else
|
linecount = count;
|
|
for(i=0;i<linecount;i++)
|
printk("%02X ",(unsigned char)data[i]);
|
for(;i<17;i++)
|
printk(" ");
|
for(i=0;i<linecount;i++) {
|
if (data[i]>=040 && data[i]<=0176)
|
printk("%c",data[i]);
|
else
|
printk(".");
|
}
|
printk("\n");
|
|
data += linecount;
|
count -= linecount;
|
}
|
} /* end of trace_block() */
|
|
/* called when HDLC frame times out
|
* update stats and do tx completion processing
|
*/
|
static void tx_timeout(struct timer_list *t)
|
{
|
SLMP_INFO *info = from_timer(info, t, tx_timer);
|
unsigned long flags;
|
|
if ( debug_level >= DEBUG_LEVEL_INFO )
|
printk( "%s(%d):%s tx_timeout()\n",
|
__FILE__,__LINE__,info->device_name);
|
if(info->tx_active && info->params.mode == MGSL_MODE_HDLC) {
|
info->icount.txtimeout++;
|
}
|
spin_lock_irqsave(&info->lock,flags);
|
info->tx_active = false;
|
info->tx_count = info->tx_put = info->tx_get = 0;
|
|
spin_unlock_irqrestore(&info->lock,flags);
|
|
#if SYNCLINK_GENERIC_HDLC
|
if (info->netcount)
|
hdlcdev_tx_done(info);
|
else
|
#endif
|
bh_transmit(info);
|
}
|
|
/* called to periodically check the DSR/RI modem signal input status
|
*/
|
static void status_timeout(struct timer_list *t)
|
{
|
u16 status = 0;
|
SLMP_INFO *info = from_timer(info, t, status_timer);
|
unsigned long flags;
|
unsigned char delta;
|
|
|
spin_lock_irqsave(&info->lock,flags);
|
get_signals(info);
|
spin_unlock_irqrestore(&info->lock,flags);
|
|
/* check for DSR/RI state change */
|
|
delta = info->old_signals ^ info->serial_signals;
|
info->old_signals = info->serial_signals;
|
|
if (delta & SerialSignal_DSR)
|
status |= MISCSTATUS_DSR_LATCHED|(info->serial_signals&SerialSignal_DSR);
|
|
if (delta & SerialSignal_RI)
|
status |= MISCSTATUS_RI_LATCHED|(info->serial_signals&SerialSignal_RI);
|
|
if (delta & SerialSignal_DCD)
|
status |= MISCSTATUS_DCD_LATCHED|(info->serial_signals&SerialSignal_DCD);
|
|
if (delta & SerialSignal_CTS)
|
status |= MISCSTATUS_CTS_LATCHED|(info->serial_signals&SerialSignal_CTS);
|
|
if (status)
|
isr_io_pin(info,status);
|
|
mod_timer(&info->status_timer, jiffies + msecs_to_jiffies(10));
|
}
|
|
|
/* Register Access Routines -
|
* All registers are memory mapped
|
*/
|
#define CALC_REGADDR() \
|
unsigned char * RegAddr = (unsigned char*)(info->sca_base + Addr); \
|
if (info->port_num > 1) \
|
RegAddr += 256; /* port 0-1 SCA0, 2-3 SCA1 */ \
|
if ( info->port_num & 1) { \
|
if (Addr > 0x7f) \
|
RegAddr += 0x40; /* DMA access */ \
|
else if (Addr > 0x1f && Addr < 0x60) \
|
RegAddr += 0x20; /* MSCI access */ \
|
}
|
|
|
static unsigned char read_reg(SLMP_INFO * info, unsigned char Addr)
|
{
|
CALC_REGADDR();
|
return *RegAddr;
|
}
|
static void write_reg(SLMP_INFO * info, unsigned char Addr, unsigned char Value)
|
{
|
CALC_REGADDR();
|
*RegAddr = Value;
|
}
|
|
static u16 read_reg16(SLMP_INFO * info, unsigned char Addr)
|
{
|
CALC_REGADDR();
|
return *((u16 *)RegAddr);
|
}
|
|
static void write_reg16(SLMP_INFO * info, unsigned char Addr, u16 Value)
|
{
|
CALC_REGADDR();
|
*((u16 *)RegAddr) = Value;
|
}
|
|
static unsigned char read_status_reg(SLMP_INFO * info)
|
{
|
unsigned char *RegAddr = (unsigned char *)info->statctrl_base;
|
return *RegAddr;
|
}
|
|
static void write_control_reg(SLMP_INFO * info)
|
{
|
unsigned char *RegAddr = (unsigned char *)info->statctrl_base;
|
*RegAddr = info->port_array[0]->ctrlreg_value;
|
}
|
|
|
static int synclinkmp_init_one (struct pci_dev *dev,
|
const struct pci_device_id *ent)
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{
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if (pci_enable_device(dev)) {
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printk("error enabling pci device %p\n", dev);
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return -EIO;
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}
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return device_init( ++synclinkmp_adapter_count, dev );
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}
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static void synclinkmp_remove_one (struct pci_dev *dev)
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{
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}
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