/* cs89x0.c: A Crystal Semiconductor (Now Cirrus Logic) CS89[02]0
|
* driver for linux.
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* Written 1996 by Russell Nelson, with reference to skeleton.c
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* written 1993-1994 by Donald Becker.
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*
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* This software may be used and distributed according to the terms
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* of the GNU General Public License, incorporated herein by reference.
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*
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* The author may be reached at nelson@crynwr.com, Crynwr
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* Software, 521 Pleasant Valley Rd., Potsdam, NY 13676
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*
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* Other contributors:
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* Mike Cruse : mcruse@cti-ltd.com
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* Russ Nelson
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* Melody Lee : ethernet@crystal.cirrus.com
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* Alan Cox
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* Andrew Morton
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* Oskar Schirmer : oskar@scara.com
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* Deepak Saxena : dsaxena@plexity.net
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* Dmitry Pervushin : dpervushin@ru.mvista.com
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* Deepak Saxena : dsaxena@plexity.net
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* Domenico Andreoli : cavokz@gmail.com
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*/
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|
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/*
|
* Set this to zero to disable DMA code
|
*
|
* Note that even if DMA is turned off we still support the 'dma' and 'use_dma'
|
* module options so we don't break any startup scripts.
|
*/
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#ifndef CONFIG_ISA_DMA_API
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#define ALLOW_DMA 0
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#else
|
#define ALLOW_DMA 1
|
#endif
|
|
/*
|
* Set this to zero to remove all the debug statements via
|
* dead code elimination
|
*/
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#define DEBUGGING 1
|
|
/* Sources:
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* Crynwr packet driver epktisa.
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* Crystal Semiconductor data sheets.
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*/
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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|
#include <linux/module.h>
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#include <linux/printk.h>
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#include <linux/errno.h>
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#include <linux/netdevice.h>
|
#include <linux/etherdevice.h>
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#include <linux/of.h>
|
#include <linux/of_device.h>
|
#include <linux/platform_device.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/fcntl.h>
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#include <linux/interrupt.h>
|
#include <linux/ioport.h>
|
#include <linux/in.h>
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#include <linux/jiffies.h>
|
#include <linux/skbuff.h>
|
#include <linux/spinlock.h>
|
#include <linux/string.h>
|
#include <linux/init.h>
|
#include <linux/bitops.h>
|
#include <linux/delay.h>
|
#include <linux/gfp.h>
|
#include <linux/io.h>
|
|
#include <asm/irq.h>
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#include <linux/atomic.h>
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#if ALLOW_DMA
|
#include <asm/dma.h>
|
#endif
|
|
#include "cs89x0.h"
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|
#define cs89_dbg(val, level, fmt, ...) \
|
do { \
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if (val <= net_debug) \
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pr_##level(fmt, ##__VA_ARGS__); \
|
} while (0)
|
|
static char version[] __initdata =
|
"v2.4.3-pre1 Russell Nelson <nelson@crynwr.com>, Andrew Morton";
|
|
#define DRV_NAME "cs89x0"
|
|
/* First, a few definitions that the brave might change.
|
* A zero-terminated list of I/O addresses to be probed. Some special flags..
|
* Addr & 1 = Read back the address port, look for signature and reset
|
* the page window before probing
|
* Addr & 3 = Reset the page window and probe
|
* The CLPS eval board has the Cirrus chip at 0x80090300, in ARM IO space,
|
* but it is possible that a Cirrus board could be plugged into the ISA
|
* slots.
|
*/
|
/* The cs8900 has 4 IRQ pins, software selectable. cs8900_irq_map maps
|
* them to system IRQ numbers. This mapping is card specific and is set to
|
* the configuration of the Cirrus Eval board for this chip.
|
*/
|
#ifndef CONFIG_CS89x0_PLATFORM
|
static unsigned int netcard_portlist[] __used __initdata = {
|
0x300, 0x320, 0x340, 0x360, 0x200, 0x220, 0x240,
|
0x260, 0x280, 0x2a0, 0x2c0, 0x2e0, 0
|
};
|
static unsigned int cs8900_irq_map[] = {
|
10, 11, 12, 5
|
};
|
#endif
|
|
#if DEBUGGING
|
static unsigned int net_debug = DEBUGGING;
|
#else
|
#define net_debug 0 /* gcc will remove all the debug code for us */
|
#endif
|
|
/* The number of low I/O ports used by the ethercard. */
|
#define NETCARD_IO_EXTENT 16
|
|
/* we allow the user to override various values normally set in the EEPROM */
|
#define FORCE_RJ45 0x0001 /* pick one of these three */
|
#define FORCE_AUI 0x0002
|
#define FORCE_BNC 0x0004
|
|
#define FORCE_AUTO 0x0010 /* pick one of these three */
|
#define FORCE_HALF 0x0020
|
#define FORCE_FULL 0x0030
|
|
/* Information that need to be kept for each board. */
|
struct net_local {
|
int chip_type; /* one of: CS8900, CS8920, CS8920M */
|
char chip_revision; /* revision letter of the chip ('A'...) */
|
int send_cmd; /* the proper send command: TX_NOW, TX_AFTER_381, or TX_AFTER_ALL */
|
int auto_neg_cnf; /* auto-negotiation word from EEPROM */
|
int adapter_cnf; /* adapter configuration from EEPROM */
|
int isa_config; /* ISA configuration from EEPROM */
|
int irq_map; /* IRQ map from EEPROM */
|
int rx_mode; /* what mode are we in? 0, RX_MULTCAST_ACCEPT, or RX_ALL_ACCEPT */
|
int curr_rx_cfg; /* a copy of PP_RxCFG */
|
int linectl; /* either 0 or LOW_RX_SQUELCH, depending on configuration. */
|
int send_underrun; /* keep track of how many underruns in a row we get */
|
int force; /* force various values; see FORCE* above. */
|
spinlock_t lock;
|
void __iomem *virt_addr;/* CS89x0 virtual address. */
|
#if ALLOW_DMA
|
int use_dma; /* Flag: we're using dma */
|
int dma; /* DMA channel */
|
int dmasize; /* 16 or 64 */
|
unsigned char *dma_buff; /* points to the beginning of the buffer */
|
unsigned char *end_dma_buff; /* points to the end of the buffer */
|
unsigned char *rx_dma_ptr; /* points to the next packet */
|
#endif
|
};
|
|
/* Example routines you must write ;->. */
|
#define tx_done(dev) 1
|
|
/*
|
* Permit 'cs89x0_dma=N' in the kernel boot environment
|
*/
|
#if !defined(MODULE)
|
#if ALLOW_DMA
|
static int g_cs89x0_dma;
|
|
static int __init dma_fn(char *str)
|
{
|
g_cs89x0_dma = simple_strtol(str, NULL, 0);
|
return 1;
|
}
|
|
__setup("cs89x0_dma=", dma_fn);
|
#endif /* ALLOW_DMA */
|
|
static int g_cs89x0_media__force;
|
|
static int __init media_fn(char *str)
|
{
|
if (!strcmp(str, "rj45"))
|
g_cs89x0_media__force = FORCE_RJ45;
|
else if (!strcmp(str, "aui"))
|
g_cs89x0_media__force = FORCE_AUI;
|
else if (!strcmp(str, "bnc"))
|
g_cs89x0_media__force = FORCE_BNC;
|
|
return 1;
|
}
|
|
__setup("cs89x0_media=", media_fn);
|
#endif
|
|
static void readwords(struct net_local *lp, int portno, void *buf, int length)
|
{
|
u8 *buf8 = (u8 *)buf;
|
|
do {
|
u16 tmp16;
|
|
tmp16 = ioread16(lp->virt_addr + portno);
|
*buf8++ = (u8)tmp16;
|
*buf8++ = (u8)(tmp16 >> 8);
|
} while (--length);
|
}
|
|
static void writewords(struct net_local *lp, int portno, void *buf, int length)
|
{
|
u8 *buf8 = (u8 *)buf;
|
|
do {
|
u16 tmp16;
|
|
tmp16 = *buf8++;
|
tmp16 |= (*buf8++) << 8;
|
iowrite16(tmp16, lp->virt_addr + portno);
|
} while (--length);
|
}
|
|
static u16
|
readreg(struct net_device *dev, u16 regno)
|
{
|
struct net_local *lp = netdev_priv(dev);
|
|
iowrite16(regno, lp->virt_addr + ADD_PORT);
|
return ioread16(lp->virt_addr + DATA_PORT);
|
}
|
|
static void
|
writereg(struct net_device *dev, u16 regno, u16 value)
|
{
|
struct net_local *lp = netdev_priv(dev);
|
|
iowrite16(regno, lp->virt_addr + ADD_PORT);
|
iowrite16(value, lp->virt_addr + DATA_PORT);
|
}
|
|
static int __init
|
wait_eeprom_ready(struct net_device *dev)
|
{
|
unsigned long timeout = jiffies;
|
/* check to see if the EEPROM is ready,
|
* a timeout is used just in case EEPROM is ready when
|
* SI_BUSY in the PP_SelfST is clear
|
*/
|
while (readreg(dev, PP_SelfST) & SI_BUSY)
|
if (time_after_eq(jiffies, timeout + 40))
|
return -1;
|
return 0;
|
}
|
|
static int __init
|
get_eeprom_data(struct net_device *dev, int off, int len, int *buffer)
|
{
|
int i;
|
|
cs89_dbg(3, info, "EEPROM data from %x for %x:", off, len);
|
for (i = 0; i < len; i++) {
|
if (wait_eeprom_ready(dev) < 0)
|
return -1;
|
/* Now send the EEPROM read command and EEPROM location to read */
|
writereg(dev, PP_EECMD, (off + i) | EEPROM_READ_CMD);
|
if (wait_eeprom_ready(dev) < 0)
|
return -1;
|
buffer[i] = readreg(dev, PP_EEData);
|
cs89_dbg(3, cont, " %04x", buffer[i]);
|
}
|
cs89_dbg(3, cont, "\n");
|
return 0;
|
}
|
|
static int __init
|
get_eeprom_cksum(int off, int len, int *buffer)
|
{
|
int i, cksum;
|
|
cksum = 0;
|
for (i = 0; i < len; i++)
|
cksum += buffer[i];
|
cksum &= 0xffff;
|
if (cksum == 0)
|
return 0;
|
return -1;
|
}
|
|
static void
|
write_irq(struct net_device *dev, int chip_type, int irq)
|
{
|
int i;
|
|
if (chip_type == CS8900) {
|
#ifndef CONFIG_CS89x0_PLATFORM
|
/* Search the mapping table for the corresponding IRQ pin. */
|
for (i = 0; i != ARRAY_SIZE(cs8900_irq_map); i++)
|
if (cs8900_irq_map[i] == irq)
|
break;
|
/* Not found */
|
if (i == ARRAY_SIZE(cs8900_irq_map))
|
i = 3;
|
#else
|
/* INTRQ0 pin is used for interrupt generation. */
|
i = 0;
|
#endif
|
writereg(dev, PP_CS8900_ISAINT, i);
|
} else {
|
writereg(dev, PP_CS8920_ISAINT, irq);
|
}
|
}
|
|
static void
|
count_rx_errors(int status, struct net_device *dev)
|
{
|
dev->stats.rx_errors++;
|
if (status & RX_RUNT)
|
dev->stats.rx_length_errors++;
|
if (status & RX_EXTRA_DATA)
|
dev->stats.rx_length_errors++;
|
if ((status & RX_CRC_ERROR) && !(status & (RX_EXTRA_DATA | RX_RUNT)))
|
/* per str 172 */
|
dev->stats.rx_crc_errors++;
|
if (status & RX_DRIBBLE)
|
dev->stats.rx_frame_errors++;
|
}
|
|
/*********************************
|
* This page contains DMA routines
|
*********************************/
|
|
#if ALLOW_DMA
|
|
#define dma_page_eq(ptr1, ptr2) ((long)(ptr1) >> 17 == (long)(ptr2) >> 17)
|
|
static void
|
get_dma_channel(struct net_device *dev)
|
{
|
struct net_local *lp = netdev_priv(dev);
|
|
if (lp->dma) {
|
dev->dma = lp->dma;
|
lp->isa_config |= ISA_RxDMA;
|
} else {
|
if ((lp->isa_config & ANY_ISA_DMA) == 0)
|
return;
|
dev->dma = lp->isa_config & DMA_NO_MASK;
|
if (lp->chip_type == CS8900)
|
dev->dma += 5;
|
if (dev->dma < 5 || dev->dma > 7) {
|
lp->isa_config &= ~ANY_ISA_DMA;
|
return;
|
}
|
}
|
}
|
|
static void
|
write_dma(struct net_device *dev, int chip_type, int dma)
|
{
|
struct net_local *lp = netdev_priv(dev);
|
if ((lp->isa_config & ANY_ISA_DMA) == 0)
|
return;
|
if (chip_type == CS8900)
|
writereg(dev, PP_CS8900_ISADMA, dma - 5);
|
else
|
writereg(dev, PP_CS8920_ISADMA, dma);
|
}
|
|
static void
|
set_dma_cfg(struct net_device *dev)
|
{
|
struct net_local *lp = netdev_priv(dev);
|
|
if (lp->use_dma) {
|
if ((lp->isa_config & ANY_ISA_DMA) == 0) {
|
cs89_dbg(3, err, "set_dma_cfg(): no DMA\n");
|
return;
|
}
|
if (lp->isa_config & ISA_RxDMA) {
|
lp->curr_rx_cfg |= RX_DMA_ONLY;
|
cs89_dbg(3, info, "set_dma_cfg(): RX_DMA_ONLY\n");
|
} else {
|
lp->curr_rx_cfg |= AUTO_RX_DMA; /* not that we support it... */
|
cs89_dbg(3, info, "set_dma_cfg(): AUTO_RX_DMA\n");
|
}
|
}
|
}
|
|
static int
|
dma_bufcfg(struct net_device *dev)
|
{
|
struct net_local *lp = netdev_priv(dev);
|
if (lp->use_dma)
|
return (lp->isa_config & ANY_ISA_DMA) ? RX_DMA_ENBL : 0;
|
else
|
return 0;
|
}
|
|
static int
|
dma_busctl(struct net_device *dev)
|
{
|
int retval = 0;
|
struct net_local *lp = netdev_priv(dev);
|
if (lp->use_dma) {
|
if (lp->isa_config & ANY_ISA_DMA)
|
retval |= RESET_RX_DMA; /* Reset the DMA pointer */
|
if (lp->isa_config & DMA_BURST)
|
retval |= DMA_BURST_MODE; /* Does ISA config specify DMA burst ? */
|
if (lp->dmasize == 64)
|
retval |= RX_DMA_SIZE_64K; /* did they ask for 64K? */
|
retval |= MEMORY_ON; /* we need memory enabled to use DMA. */
|
}
|
return retval;
|
}
|
|
static void
|
dma_rx(struct net_device *dev)
|
{
|
struct net_local *lp = netdev_priv(dev);
|
struct sk_buff *skb;
|
int status, length;
|
unsigned char *bp = lp->rx_dma_ptr;
|
|
status = bp[0] + (bp[1] << 8);
|
length = bp[2] + (bp[3] << 8);
|
bp += 4;
|
|
cs89_dbg(5, debug, "%s: receiving DMA packet at %lx, status %x, length %x\n",
|
dev->name, (unsigned long)bp, status, length);
|
|
if ((status & RX_OK) == 0) {
|
count_rx_errors(status, dev);
|
goto skip_this_frame;
|
}
|
|
/* Malloc up new buffer. */
|
skb = netdev_alloc_skb(dev, length + 2);
|
if (skb == NULL) {
|
dev->stats.rx_dropped++;
|
|
/* AKPM: advance bp to the next frame */
|
skip_this_frame:
|
bp += (length + 3) & ~3;
|
if (bp >= lp->end_dma_buff)
|
bp -= lp->dmasize * 1024;
|
lp->rx_dma_ptr = bp;
|
return;
|
}
|
skb_reserve(skb, 2); /* longword align L3 header */
|
|
if (bp + length > lp->end_dma_buff) {
|
int semi_cnt = lp->end_dma_buff - bp;
|
skb_put_data(skb, bp, semi_cnt);
|
skb_put_data(skb, lp->dma_buff, length - semi_cnt);
|
} else {
|
skb_put_data(skb, bp, length);
|
}
|
bp += (length + 3) & ~3;
|
if (bp >= lp->end_dma_buff)
|
bp -= lp->dmasize*1024;
|
lp->rx_dma_ptr = bp;
|
|
cs89_dbg(3, info, "%s: received %d byte DMA packet of type %x\n",
|
dev->name, length,
|
((skb->data[ETH_ALEN + ETH_ALEN] << 8) |
|
skb->data[ETH_ALEN + ETH_ALEN + 1]));
|
|
skb->protocol = eth_type_trans(skb, dev);
|
netif_rx(skb);
|
dev->stats.rx_packets++;
|
dev->stats.rx_bytes += length;
|
}
|
|
static void release_dma_buff(struct net_local *lp)
|
{
|
if (lp->dma_buff) {
|
free_pages((unsigned long)(lp->dma_buff),
|
get_order(lp->dmasize * 1024));
|
lp->dma_buff = NULL;
|
}
|
}
|
|
#endif /* ALLOW_DMA */
|
|
static void
|
control_dc_dc(struct net_device *dev, int on_not_off)
|
{
|
struct net_local *lp = netdev_priv(dev);
|
unsigned int selfcontrol;
|
unsigned long timenow = jiffies;
|
/* control the DC to DC convertor in the SelfControl register.
|
* Note: This is hooked up to a general purpose pin, might not
|
* always be a DC to DC convertor.
|
*/
|
|
selfcontrol = HCB1_ENBL; /* Enable the HCB1 bit as an output */
|
if (((lp->adapter_cnf & A_CNF_DC_DC_POLARITY) != 0) ^ on_not_off)
|
selfcontrol |= HCB1;
|
else
|
selfcontrol &= ~HCB1;
|
writereg(dev, PP_SelfCTL, selfcontrol);
|
|
/* Wait for the DC/DC converter to power up - 500ms */
|
while (time_before(jiffies, timenow + HZ))
|
;
|
}
|
|
/* send a test packet - return true if carrier bits are ok */
|
static int
|
send_test_pkt(struct net_device *dev)
|
{
|
struct net_local *lp = netdev_priv(dev);
|
char test_packet[] = {
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
0, 46, /* A 46 in network order */
|
0, 0, /* DSAP=0 & SSAP=0 fields */
|
0xf3, 0 /* Control (Test Req + P bit set) */
|
};
|
unsigned long timenow = jiffies;
|
|
writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_TX_ON);
|
|
memcpy(test_packet, dev->dev_addr, ETH_ALEN);
|
memcpy(test_packet + ETH_ALEN, dev->dev_addr, ETH_ALEN);
|
|
iowrite16(TX_AFTER_ALL, lp->virt_addr + TX_CMD_PORT);
|
iowrite16(ETH_ZLEN, lp->virt_addr + TX_LEN_PORT);
|
|
/* Test to see if the chip has allocated memory for the packet */
|
while (time_before(jiffies, timenow + 5))
|
if (readreg(dev, PP_BusST) & READY_FOR_TX_NOW)
|
break;
|
if (time_after_eq(jiffies, timenow + 5))
|
return 0; /* this shouldn't happen */
|
|
/* Write the contents of the packet */
|
writewords(lp, TX_FRAME_PORT, test_packet, (ETH_ZLEN + 1) >> 1);
|
|
cs89_dbg(1, debug, "Sending test packet ");
|
/* wait a couple of jiffies for packet to be received */
|
for (timenow = jiffies; time_before(jiffies, timenow + 3);)
|
;
|
if ((readreg(dev, PP_TxEvent) & TX_SEND_OK_BITS) == TX_OK) {
|
cs89_dbg(1, cont, "succeeded\n");
|
return 1;
|
}
|
cs89_dbg(1, cont, "failed\n");
|
return 0;
|
}
|
|
#define DETECTED_NONE 0
|
#define DETECTED_RJ45H 1
|
#define DETECTED_RJ45F 2
|
#define DETECTED_AUI 3
|
#define DETECTED_BNC 4
|
|
static int
|
detect_tp(struct net_device *dev)
|
{
|
struct net_local *lp = netdev_priv(dev);
|
unsigned long timenow = jiffies;
|
int fdx;
|
|
cs89_dbg(1, debug, "%s: Attempting TP\n", dev->name);
|
|
/* If connected to another full duplex capable 10-Base-T card
|
* the link pulses seem to be lost when the auto detect bit in
|
* the LineCTL is set. To overcome this the auto detect bit will
|
* be cleared whilst testing the 10-Base-T interface. This would
|
* not be necessary for the sparrow chip but is simpler to do it
|
* anyway.
|
*/
|
writereg(dev, PP_LineCTL, lp->linectl & ~AUI_ONLY);
|
control_dc_dc(dev, 0);
|
|
/* Delay for the hardware to work out if the TP cable is present
|
* - 150ms
|
*/
|
for (timenow = jiffies; time_before(jiffies, timenow + 15);)
|
;
|
if ((readreg(dev, PP_LineST) & LINK_OK) == 0)
|
return DETECTED_NONE;
|
|
if (lp->chip_type == CS8900) {
|
switch (lp->force & 0xf0) {
|
#if 0
|
case FORCE_AUTO:
|
pr_info("%s: cs8900 doesn't autonegotiate\n",
|
dev->name);
|
return DETECTED_NONE;
|
#endif
|
/* CS8900 doesn't support AUTO, change to HALF*/
|
case FORCE_AUTO:
|
lp->force &= ~FORCE_AUTO;
|
lp->force |= FORCE_HALF;
|
break;
|
case FORCE_HALF:
|
break;
|
case FORCE_FULL:
|
writereg(dev, PP_TestCTL,
|
readreg(dev, PP_TestCTL) | FDX_8900);
|
break;
|
}
|
fdx = readreg(dev, PP_TestCTL) & FDX_8900;
|
} else {
|
switch (lp->force & 0xf0) {
|
case FORCE_AUTO:
|
lp->auto_neg_cnf = AUTO_NEG_ENABLE;
|
break;
|
case FORCE_HALF:
|
lp->auto_neg_cnf = 0;
|
break;
|
case FORCE_FULL:
|
lp->auto_neg_cnf = RE_NEG_NOW | ALLOW_FDX;
|
break;
|
}
|
|
writereg(dev, PP_AutoNegCTL, lp->auto_neg_cnf & AUTO_NEG_MASK);
|
|
if ((lp->auto_neg_cnf & AUTO_NEG_BITS) == AUTO_NEG_ENABLE) {
|
pr_info("%s: negotiating duplex...\n", dev->name);
|
while (readreg(dev, PP_AutoNegST) & AUTO_NEG_BUSY) {
|
if (time_after(jiffies, timenow + 4000)) {
|
pr_err("**** Full / half duplex auto-negotiation timed out ****\n");
|
break;
|
}
|
}
|
}
|
fdx = readreg(dev, PP_AutoNegST) & FDX_ACTIVE;
|
}
|
if (fdx)
|
return DETECTED_RJ45F;
|
else
|
return DETECTED_RJ45H;
|
}
|
|
static int
|
detect_bnc(struct net_device *dev)
|
{
|
struct net_local *lp = netdev_priv(dev);
|
|
cs89_dbg(1, debug, "%s: Attempting BNC\n", dev->name);
|
control_dc_dc(dev, 1);
|
|
writereg(dev, PP_LineCTL, (lp->linectl & ~AUTO_AUI_10BASET) | AUI_ONLY);
|
|
if (send_test_pkt(dev))
|
return DETECTED_BNC;
|
else
|
return DETECTED_NONE;
|
}
|
|
static int
|
detect_aui(struct net_device *dev)
|
{
|
struct net_local *lp = netdev_priv(dev);
|
|
cs89_dbg(1, debug, "%s: Attempting AUI\n", dev->name);
|
control_dc_dc(dev, 0);
|
|
writereg(dev, PP_LineCTL, (lp->linectl & ~AUTO_AUI_10BASET) | AUI_ONLY);
|
|
if (send_test_pkt(dev))
|
return DETECTED_AUI;
|
else
|
return DETECTED_NONE;
|
}
|
|
/* We have a good packet(s), get it/them out of the buffers. */
|
static void
|
net_rx(struct net_device *dev)
|
{
|
struct net_local *lp = netdev_priv(dev);
|
struct sk_buff *skb;
|
int status, length;
|
|
status = ioread16(lp->virt_addr + RX_FRAME_PORT);
|
length = ioread16(lp->virt_addr + RX_FRAME_PORT);
|
|
if ((status & RX_OK) == 0) {
|
count_rx_errors(status, dev);
|
return;
|
}
|
|
/* Malloc up new buffer. */
|
skb = netdev_alloc_skb(dev, length + 2);
|
if (skb == NULL) {
|
dev->stats.rx_dropped++;
|
return;
|
}
|
skb_reserve(skb, 2); /* longword align L3 header */
|
|
readwords(lp, RX_FRAME_PORT, skb_put(skb, length), length >> 1);
|
if (length & 1)
|
skb->data[length-1] = ioread16(lp->virt_addr + RX_FRAME_PORT);
|
|
cs89_dbg(3, debug, "%s: received %d byte packet of type %x\n",
|
dev->name, length,
|
(skb->data[ETH_ALEN + ETH_ALEN] << 8) |
|
skb->data[ETH_ALEN + ETH_ALEN + 1]);
|
|
skb->protocol = eth_type_trans(skb, dev);
|
netif_rx(skb);
|
dev->stats.rx_packets++;
|
dev->stats.rx_bytes += length;
|
}
|
|
/* The typical workload of the driver:
|
* Handle the network interface interrupts.
|
*/
|
|
static irqreturn_t net_interrupt(int irq, void *dev_id)
|
{
|
struct net_device *dev = dev_id;
|
struct net_local *lp;
|
int status;
|
int handled = 0;
|
|
lp = netdev_priv(dev);
|
|
/* we MUST read all the events out of the ISQ, otherwise we'll never
|
* get interrupted again. As a consequence, we can't have any limit
|
* on the number of times we loop in the interrupt handler. The
|
* hardware guarantees that eventually we'll run out of events. Of
|
* course, if you're on a slow machine, and packets are arriving
|
* faster than you can read them off, you're screwed. Hasta la
|
* vista, baby!
|
*/
|
while ((status = ioread16(lp->virt_addr + ISQ_PORT))) {
|
cs89_dbg(4, debug, "%s: event=%04x\n", dev->name, status);
|
handled = 1;
|
switch (status & ISQ_EVENT_MASK) {
|
case ISQ_RECEIVER_EVENT:
|
/* Got a packet(s). */
|
net_rx(dev);
|
break;
|
case ISQ_TRANSMITTER_EVENT:
|
dev->stats.tx_packets++;
|
netif_wake_queue(dev); /* Inform upper layers. */
|
if ((status & (TX_OK |
|
TX_LOST_CRS |
|
TX_SQE_ERROR |
|
TX_LATE_COL |
|
TX_16_COL)) != TX_OK) {
|
if ((status & TX_OK) == 0)
|
dev->stats.tx_errors++;
|
if (status & TX_LOST_CRS)
|
dev->stats.tx_carrier_errors++;
|
if (status & TX_SQE_ERROR)
|
dev->stats.tx_heartbeat_errors++;
|
if (status & TX_LATE_COL)
|
dev->stats.tx_window_errors++;
|
if (status & TX_16_COL)
|
dev->stats.tx_aborted_errors++;
|
}
|
break;
|
case ISQ_BUFFER_EVENT:
|
if (status & READY_FOR_TX) {
|
/* we tried to transmit a packet earlier,
|
* but inexplicably ran out of buffers.
|
* That shouldn't happen since we only ever
|
* load one packet. Shrug. Do the right
|
* thing anyway.
|
*/
|
netif_wake_queue(dev); /* Inform upper layers. */
|
}
|
if (status & TX_UNDERRUN) {
|
cs89_dbg(0, err, "%s: transmit underrun\n",
|
dev->name);
|
lp->send_underrun++;
|
if (lp->send_underrun == 3)
|
lp->send_cmd = TX_AFTER_381;
|
else if (lp->send_underrun == 6)
|
lp->send_cmd = TX_AFTER_ALL;
|
/* transmit cycle is done, although
|
* frame wasn't transmitted - this
|
* avoids having to wait for the upper
|
* layers to timeout on us, in the
|
* event of a tx underrun
|
*/
|
netif_wake_queue(dev); /* Inform upper layers. */
|
}
|
#if ALLOW_DMA
|
if (lp->use_dma && (status & RX_DMA)) {
|
int count = readreg(dev, PP_DmaFrameCnt);
|
while (count) {
|
cs89_dbg(5, debug,
|
"%s: receiving %d DMA frames\n",
|
dev->name, count);
|
if (count > 1)
|
cs89_dbg(2, debug,
|
"%s: receiving %d DMA frames\n",
|
dev->name, count);
|
dma_rx(dev);
|
if (--count == 0)
|
count = readreg(dev, PP_DmaFrameCnt);
|
if (count > 0)
|
cs89_dbg(2, debug,
|
"%s: continuing with %d DMA frames\n",
|
dev->name, count);
|
}
|
}
|
#endif
|
break;
|
case ISQ_RX_MISS_EVENT:
|
dev->stats.rx_missed_errors += (status >> 6);
|
break;
|
case ISQ_TX_COL_EVENT:
|
dev->stats.collisions += (status >> 6);
|
break;
|
}
|
}
|
return IRQ_RETVAL(handled);
|
}
|
|
/* Open/initialize the board. This is called (in the current kernel)
|
sometime after booting when the 'ifconfig' program is run.
|
|
This routine should set everything up anew at each open, even
|
registers that "should" only need to be set once at boot, so that
|
there is non-reboot way to recover if something goes wrong.
|
*/
|
|
/* AKPM: do we need to do any locking here? */
|
|
static int
|
net_open(struct net_device *dev)
|
{
|
struct net_local *lp = netdev_priv(dev);
|
int result = 0;
|
int i;
|
int ret;
|
|
if (dev->irq < 2) {
|
/* Allow interrupts to be generated by the chip */
|
/* Cirrus' release had this: */
|
#if 0
|
writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL) | ENABLE_IRQ);
|
#endif
|
/* And 2.3.47 had this: */
|
writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
|
|
for (i = 2; i < CS8920_NO_INTS; i++) {
|
if ((1 << i) & lp->irq_map) {
|
if (request_irq(i, net_interrupt, 0, dev->name,
|
dev) == 0) {
|
dev->irq = i;
|
write_irq(dev, lp->chip_type, i);
|
/* writereg(dev, PP_BufCFG, GENERATE_SW_INTERRUPT); */
|
break;
|
}
|
}
|
}
|
|
if (i >= CS8920_NO_INTS) {
|
writereg(dev, PP_BusCTL, 0); /* disable interrupts. */
|
pr_err("can't get an interrupt\n");
|
ret = -EAGAIN;
|
goto bad_out;
|
}
|
} else {
|
#if !defined(CONFIG_CS89x0_PLATFORM)
|
if (((1 << dev->irq) & lp->irq_map) == 0) {
|
pr_err("%s: IRQ %d is not in our map of allowable IRQs, which is %x\n",
|
dev->name, dev->irq, lp->irq_map);
|
ret = -EAGAIN;
|
goto bad_out;
|
}
|
#endif
|
/* FIXME: Cirrus' release had this: */
|
writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ);
|
/* And 2.3.47 had this: */
|
#if 0
|
writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
|
#endif
|
write_irq(dev, lp->chip_type, dev->irq);
|
ret = request_irq(dev->irq, net_interrupt, 0, dev->name, dev);
|
if (ret) {
|
pr_err("request_irq(%d) failed\n", dev->irq);
|
goto bad_out;
|
}
|
}
|
|
#if ALLOW_DMA
|
if (lp->use_dma && (lp->isa_config & ANY_ISA_DMA)) {
|
unsigned long flags;
|
lp->dma_buff = (unsigned char *)__get_dma_pages(GFP_KERNEL,
|
get_order(lp->dmasize * 1024));
|
if (!lp->dma_buff) {
|
pr_err("%s: cannot get %dK memory for DMA\n",
|
dev->name, lp->dmasize);
|
goto release_irq;
|
}
|
cs89_dbg(1, debug, "%s: dma %lx %lx\n",
|
dev->name,
|
(unsigned long)lp->dma_buff,
|
(unsigned long)isa_virt_to_bus(lp->dma_buff));
|
if ((unsigned long)lp->dma_buff >= MAX_DMA_ADDRESS ||
|
!dma_page_eq(lp->dma_buff,
|
lp->dma_buff + lp->dmasize * 1024 - 1)) {
|
pr_err("%s: not usable as DMA buffer\n", dev->name);
|
goto release_irq;
|
}
|
memset(lp->dma_buff, 0, lp->dmasize * 1024); /* Why? */
|
if (request_dma(dev->dma, dev->name)) {
|
pr_err("%s: cannot get dma channel %d\n",
|
dev->name, dev->dma);
|
goto release_irq;
|
}
|
write_dma(dev, lp->chip_type, dev->dma);
|
lp->rx_dma_ptr = lp->dma_buff;
|
lp->end_dma_buff = lp->dma_buff + lp->dmasize * 1024;
|
spin_lock_irqsave(&lp->lock, flags);
|
disable_dma(dev->dma);
|
clear_dma_ff(dev->dma);
|
set_dma_mode(dev->dma, DMA_RX_MODE); /* auto_init as well */
|
set_dma_addr(dev->dma, isa_virt_to_bus(lp->dma_buff));
|
set_dma_count(dev->dma, lp->dmasize * 1024);
|
enable_dma(dev->dma);
|
spin_unlock_irqrestore(&lp->lock, flags);
|
}
|
#endif /* ALLOW_DMA */
|
|
/* set the Ethernet address */
|
for (i = 0; i < ETH_ALEN / 2; i++)
|
writereg(dev, PP_IA + i * 2,
|
(dev->dev_addr[i * 2] |
|
(dev->dev_addr[i * 2 + 1] << 8)));
|
|
/* while we're testing the interface, leave interrupts disabled */
|
writereg(dev, PP_BusCTL, MEMORY_ON);
|
|
/* Set the LineCTL quintuplet based on adapter configuration read from EEPROM */
|
if ((lp->adapter_cnf & A_CNF_EXTND_10B_2) &&
|
(lp->adapter_cnf & A_CNF_LOW_RX_SQUELCH))
|
lp->linectl = LOW_RX_SQUELCH;
|
else
|
lp->linectl = 0;
|
|
/* check to make sure that they have the "right" hardware available */
|
switch (lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
|
case A_CNF_MEDIA_10B_T:
|
result = lp->adapter_cnf & A_CNF_10B_T;
|
break;
|
case A_CNF_MEDIA_AUI:
|
result = lp->adapter_cnf & A_CNF_AUI;
|
break;
|
case A_CNF_MEDIA_10B_2:
|
result = lp->adapter_cnf & A_CNF_10B_2;
|
break;
|
default:
|
result = lp->adapter_cnf & (A_CNF_10B_T |
|
A_CNF_AUI |
|
A_CNF_10B_2);
|
}
|
if (!result) {
|
pr_err("%s: EEPROM is configured for unavailable media\n",
|
dev->name);
|
release_dma:
|
#if ALLOW_DMA
|
free_dma(dev->dma);
|
release_irq:
|
release_dma_buff(lp);
|
#endif
|
writereg(dev, PP_LineCTL,
|
readreg(dev, PP_LineCTL) & ~(SERIAL_TX_ON | SERIAL_RX_ON));
|
free_irq(dev->irq, dev);
|
ret = -EAGAIN;
|
goto bad_out;
|
}
|
|
/* set the hardware to the configured choice */
|
switch (lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
|
case A_CNF_MEDIA_10B_T:
|
result = detect_tp(dev);
|
if (result == DETECTED_NONE) {
|
pr_warn("%s: 10Base-T (RJ-45) has no cable\n",
|
dev->name);
|
if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
|
result = DETECTED_RJ45H; /* Yes! I don't care if I see a link pulse */
|
}
|
break;
|
case A_CNF_MEDIA_AUI:
|
result = detect_aui(dev);
|
if (result == DETECTED_NONE) {
|
pr_warn("%s: 10Base-5 (AUI) has no cable\n", dev->name);
|
if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
|
result = DETECTED_AUI; /* Yes! I don't care if I see a carrrier */
|
}
|
break;
|
case A_CNF_MEDIA_10B_2:
|
result = detect_bnc(dev);
|
if (result == DETECTED_NONE) {
|
pr_warn("%s: 10Base-2 (BNC) has no cable\n", dev->name);
|
if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
|
result = DETECTED_BNC; /* Yes! I don't care if I can xmit a packet */
|
}
|
break;
|
case A_CNF_MEDIA_AUTO:
|
writereg(dev, PP_LineCTL, lp->linectl | AUTO_AUI_10BASET);
|
if (lp->adapter_cnf & A_CNF_10B_T) {
|
result = detect_tp(dev);
|
if (result != DETECTED_NONE)
|
break;
|
}
|
if (lp->adapter_cnf & A_CNF_AUI) {
|
result = detect_aui(dev);
|
if (result != DETECTED_NONE)
|
break;
|
}
|
if (lp->adapter_cnf & A_CNF_10B_2) {
|
result = detect_bnc(dev);
|
if (result != DETECTED_NONE)
|
break;
|
}
|
pr_err("%s: no media detected\n", dev->name);
|
goto release_dma;
|
}
|
switch (result) {
|
case DETECTED_NONE:
|
pr_err("%s: no network cable attached to configured media\n",
|
dev->name);
|
goto release_dma;
|
case DETECTED_RJ45H:
|
pr_info("%s: using half-duplex 10Base-T (RJ-45)\n", dev->name);
|
break;
|
case DETECTED_RJ45F:
|
pr_info("%s: using full-duplex 10Base-T (RJ-45)\n", dev->name);
|
break;
|
case DETECTED_AUI:
|
pr_info("%s: using 10Base-5 (AUI)\n", dev->name);
|
break;
|
case DETECTED_BNC:
|
pr_info("%s: using 10Base-2 (BNC)\n", dev->name);
|
break;
|
}
|
|
/* Turn on both receive and transmit operations */
|
writereg(dev, PP_LineCTL,
|
readreg(dev, PP_LineCTL) | SERIAL_RX_ON | SERIAL_TX_ON);
|
|
/* Receive only error free packets addressed to this card */
|
lp->rx_mode = 0;
|
writereg(dev, PP_RxCTL, DEF_RX_ACCEPT);
|
|
lp->curr_rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL;
|
|
if (lp->isa_config & STREAM_TRANSFER)
|
lp->curr_rx_cfg |= RX_STREAM_ENBL;
|
#if ALLOW_DMA
|
set_dma_cfg(dev);
|
#endif
|
writereg(dev, PP_RxCFG, lp->curr_rx_cfg);
|
|
writereg(dev, PP_TxCFG, (TX_LOST_CRS_ENBL |
|
TX_SQE_ERROR_ENBL |
|
TX_OK_ENBL |
|
TX_LATE_COL_ENBL |
|
TX_JBR_ENBL |
|
TX_ANY_COL_ENBL |
|
TX_16_COL_ENBL));
|
|
writereg(dev, PP_BufCFG, (READY_FOR_TX_ENBL |
|
RX_MISS_COUNT_OVRFLOW_ENBL |
|
#if ALLOW_DMA
|
dma_bufcfg(dev) |
|
#endif
|
TX_COL_COUNT_OVRFLOW_ENBL |
|
TX_UNDERRUN_ENBL));
|
|
/* now that we've got our act together, enable everything */
|
writereg(dev, PP_BusCTL, (ENABLE_IRQ
|
| (dev->mem_start ? MEMORY_ON : 0) /* turn memory on */
|
#if ALLOW_DMA
|
| dma_busctl(dev)
|
#endif
|
));
|
netif_start_queue(dev);
|
cs89_dbg(1, debug, "net_open() succeeded\n");
|
return 0;
|
bad_out:
|
return ret;
|
}
|
|
/* The inverse routine to net_open(). */
|
static int
|
net_close(struct net_device *dev)
|
{
|
#if ALLOW_DMA
|
struct net_local *lp = netdev_priv(dev);
|
#endif
|
|
netif_stop_queue(dev);
|
|
writereg(dev, PP_RxCFG, 0);
|
writereg(dev, PP_TxCFG, 0);
|
writereg(dev, PP_BufCFG, 0);
|
writereg(dev, PP_BusCTL, 0);
|
|
free_irq(dev->irq, dev);
|
|
#if ALLOW_DMA
|
if (lp->use_dma && lp->dma) {
|
free_dma(dev->dma);
|
release_dma_buff(lp);
|
}
|
#endif
|
|
/* Update the statistics here. */
|
return 0;
|
}
|
|
/* Get the current statistics.
|
* This may be called with the card open or closed.
|
*/
|
static struct net_device_stats *
|
net_get_stats(struct net_device *dev)
|
{
|
struct net_local *lp = netdev_priv(dev);
|
unsigned long flags;
|
|
spin_lock_irqsave(&lp->lock, flags);
|
/* Update the statistics from the device registers. */
|
dev->stats.rx_missed_errors += (readreg(dev, PP_RxMiss) >> 6);
|
dev->stats.collisions += (readreg(dev, PP_TxCol) >> 6);
|
spin_unlock_irqrestore(&lp->lock, flags);
|
|
return &dev->stats;
|
}
|
|
static void net_timeout(struct net_device *dev, unsigned int txqueue)
|
{
|
/* If we get here, some higher level has decided we are broken.
|
There should really be a "kick me" function call instead. */
|
cs89_dbg(0, err, "%s: transmit timed out, %s?\n",
|
dev->name,
|
tx_done(dev) ? "IRQ conflict" : "network cable problem");
|
/* Try to restart the adaptor. */
|
netif_wake_queue(dev);
|
}
|
|
static netdev_tx_t net_send_packet(struct sk_buff *skb, struct net_device *dev)
|
{
|
struct net_local *lp = netdev_priv(dev);
|
unsigned long flags;
|
|
cs89_dbg(3, debug, "%s: sent %d byte packet of type %x\n",
|
dev->name, skb->len,
|
((skb->data[ETH_ALEN + ETH_ALEN] << 8) |
|
skb->data[ETH_ALEN + ETH_ALEN + 1]));
|
|
/* keep the upload from being interrupted, since we
|
* ask the chip to start transmitting before the
|
* whole packet has been completely uploaded.
|
*/
|
|
spin_lock_irqsave(&lp->lock, flags);
|
netif_stop_queue(dev);
|
|
/* initiate a transmit sequence */
|
iowrite16(lp->send_cmd, lp->virt_addr + TX_CMD_PORT);
|
iowrite16(skb->len, lp->virt_addr + TX_LEN_PORT);
|
|
/* Test to see if the chip has allocated memory for the packet */
|
if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) {
|
/* Gasp! It hasn't. But that shouldn't happen since
|
* we're waiting for TxOk, so return 1 and requeue this packet.
|
*/
|
|
spin_unlock_irqrestore(&lp->lock, flags);
|
cs89_dbg(0, err, "Tx buffer not free!\n");
|
return NETDEV_TX_BUSY;
|
}
|
/* Write the contents of the packet */
|
writewords(lp, TX_FRAME_PORT, skb->data, (skb->len + 1) >> 1);
|
spin_unlock_irqrestore(&lp->lock, flags);
|
dev->stats.tx_bytes += skb->len;
|
dev_consume_skb_any(skb);
|
|
/* We DO NOT call netif_wake_queue() here.
|
* We also DO NOT call netif_start_queue().
|
*
|
* Either of these would cause another bottom half run through
|
* net_send_packet() before this packet has fully gone out.
|
* That causes us to hit the "Gasp!" above and the send is rescheduled.
|
* it runs like a dog. We just return and wait for the Tx completion
|
* interrupt handler to restart the netdevice layer
|
*/
|
|
return NETDEV_TX_OK;
|
}
|
|
static void set_multicast_list(struct net_device *dev)
|
{
|
struct net_local *lp = netdev_priv(dev);
|
unsigned long flags;
|
u16 cfg;
|
|
spin_lock_irqsave(&lp->lock, flags);
|
if (dev->flags & IFF_PROMISC)
|
lp->rx_mode = RX_ALL_ACCEPT;
|
else if ((dev->flags & IFF_ALLMULTI) || !netdev_mc_empty(dev))
|
/* The multicast-accept list is initialized to accept-all,
|
* and we rely on higher-level filtering for now.
|
*/
|
lp->rx_mode = RX_MULTCAST_ACCEPT;
|
else
|
lp->rx_mode = 0;
|
|
writereg(dev, PP_RxCTL, DEF_RX_ACCEPT | lp->rx_mode);
|
|
/* in promiscuous mode, we accept errored packets,
|
* so we have to enable interrupts on them also
|
*/
|
cfg = lp->curr_rx_cfg;
|
if (lp->rx_mode == RX_ALL_ACCEPT)
|
cfg |= RX_CRC_ERROR_ENBL | RX_RUNT_ENBL | RX_EXTRA_DATA_ENBL;
|
writereg(dev, PP_RxCFG, cfg);
|
spin_unlock_irqrestore(&lp->lock, flags);
|
}
|
|
static int set_mac_address(struct net_device *dev, void *p)
|
{
|
int i;
|
struct sockaddr *addr = p;
|
|
if (netif_running(dev))
|
return -EBUSY;
|
|
memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
|
|
cs89_dbg(0, debug, "%s: Setting MAC address to %pM\n",
|
dev->name, dev->dev_addr);
|
|
/* set the Ethernet address */
|
for (i = 0; i < ETH_ALEN / 2; i++)
|
writereg(dev, PP_IA + i * 2,
|
(dev->dev_addr[i * 2] |
|
(dev->dev_addr[i * 2 + 1] << 8)));
|
|
return 0;
|
}
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
/*
|
* Polling receive - used by netconsole and other diagnostic tools
|
* to allow network i/o with interrupts disabled.
|
*/
|
static void net_poll_controller(struct net_device *dev)
|
{
|
disable_irq(dev->irq);
|
net_interrupt(dev->irq, dev);
|
enable_irq(dev->irq);
|
}
|
#endif
|
|
static const struct net_device_ops net_ops = {
|
.ndo_open = net_open,
|
.ndo_stop = net_close,
|
.ndo_tx_timeout = net_timeout,
|
.ndo_start_xmit = net_send_packet,
|
.ndo_get_stats = net_get_stats,
|
.ndo_set_rx_mode = set_multicast_list,
|
.ndo_set_mac_address = set_mac_address,
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
.ndo_poll_controller = net_poll_controller,
|
#endif
|
.ndo_validate_addr = eth_validate_addr,
|
};
|
|
static void __init reset_chip(struct net_device *dev)
|
{
|
#if !defined(CONFIG_MACH_MX31ADS)
|
struct net_local *lp = netdev_priv(dev);
|
unsigned long reset_start_time;
|
|
writereg(dev, PP_SelfCTL, readreg(dev, PP_SelfCTL) | POWER_ON_RESET);
|
|
/* wait 30 ms */
|
msleep(30);
|
|
if (lp->chip_type != CS8900) {
|
/* Hardware problem requires PNP registers to be reconfigured after a reset */
|
iowrite16(PP_CS8920_ISAINT, lp->virt_addr + ADD_PORT);
|
iowrite8(dev->irq, lp->virt_addr + DATA_PORT);
|
iowrite8(0, lp->virt_addr + DATA_PORT + 1);
|
|
iowrite16(PP_CS8920_ISAMemB, lp->virt_addr + ADD_PORT);
|
iowrite8((dev->mem_start >> 16) & 0xff,
|
lp->virt_addr + DATA_PORT);
|
iowrite8((dev->mem_start >> 8) & 0xff,
|
lp->virt_addr + DATA_PORT + 1);
|
}
|
|
/* Wait until the chip is reset */
|
reset_start_time = jiffies;
|
while ((readreg(dev, PP_SelfST) & INIT_DONE) == 0 &&
|
time_before(jiffies, reset_start_time + 2))
|
;
|
#endif /* !CONFIG_MACH_MX31ADS */
|
}
|
|
/* This is the real probe routine.
|
* Linux has a history of friendly device probes on the ISA bus.
|
* A good device probes avoids doing writes, and
|
* verifies that the correct device exists and functions.
|
* Return 0 on success.
|
*/
|
static int __init
|
cs89x0_probe1(struct net_device *dev, void __iomem *ioaddr, int modular)
|
{
|
struct net_local *lp = netdev_priv(dev);
|
int i;
|
int tmp;
|
unsigned rev_type = 0;
|
int eeprom_buff[CHKSUM_LEN];
|
int retval;
|
|
/* Initialize the device structure. */
|
if (!modular) {
|
memset(lp, 0, sizeof(*lp));
|
spin_lock_init(&lp->lock);
|
#ifndef MODULE
|
#if ALLOW_DMA
|
if (g_cs89x0_dma) {
|
lp->use_dma = 1;
|
lp->dma = g_cs89x0_dma;
|
lp->dmasize = 16; /* Could make this an option... */
|
}
|
#endif
|
lp->force = g_cs89x0_media__force;
|
#endif
|
}
|
|
pr_debug("PP_addr at %p[%x]: 0x%x\n",
|
ioaddr, ADD_PORT, ioread16(ioaddr + ADD_PORT));
|
iowrite16(PP_ChipID, ioaddr + ADD_PORT);
|
|
tmp = ioread16(ioaddr + DATA_PORT);
|
if (tmp != CHIP_EISA_ID_SIG) {
|
pr_debug("%s: incorrect signature at %p[%x]: 0x%x!="
|
CHIP_EISA_ID_SIG_STR "\n",
|
dev->name, ioaddr, DATA_PORT, tmp);
|
retval = -ENODEV;
|
goto out1;
|
}
|
|
lp->virt_addr = ioaddr;
|
|
/* get the chip type */
|
rev_type = readreg(dev, PRODUCT_ID_ADD);
|
lp->chip_type = rev_type & ~REVISON_BITS;
|
lp->chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A';
|
|
/* Check the chip type and revision in order to set the correct
|
* send command. CS8920 revision C and CS8900 revision F can use
|
* the faster send.
|
*/
|
lp->send_cmd = TX_AFTER_381;
|
if (lp->chip_type == CS8900 && lp->chip_revision >= 'F')
|
lp->send_cmd = TX_NOW;
|
if (lp->chip_type != CS8900 && lp->chip_revision >= 'C')
|
lp->send_cmd = TX_NOW;
|
|
pr_info_once("%s\n", version);
|
|
pr_info("%s: cs89%c0%s rev %c found at %p ",
|
dev->name,
|
lp->chip_type == CS8900 ? '0' : '2',
|
lp->chip_type == CS8920M ? "M" : "",
|
lp->chip_revision,
|
lp->virt_addr);
|
|
reset_chip(dev);
|
|
/* Here we read the current configuration of the chip.
|
* If there is no Extended EEPROM then the idea is to not disturb
|
* the chip configuration, it should have been correctly setup by
|
* automatic EEPROM read on reset. So, if the chip says it read
|
* the EEPROM the driver will always do *something* instead of
|
* complain that adapter_cnf is 0.
|
*/
|
|
if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) ==
|
(EEPROM_OK | EEPROM_PRESENT)) {
|
/* Load the MAC. */
|
for (i = 0; i < ETH_ALEN / 2; i++) {
|
unsigned int Addr;
|
Addr = readreg(dev, PP_IA + i * 2);
|
dev->dev_addr[i * 2] = Addr & 0xFF;
|
dev->dev_addr[i * 2 + 1] = Addr >> 8;
|
}
|
|
/* Load the Adapter Configuration.
|
* Note: Barring any more specific information from some
|
* other source (ie EEPROM+Schematics), we would not know
|
* how to operate a 10Base2 interface on the AUI port.
|
* However, since we do read the status of HCB1 and use
|
* settings that always result in calls to control_dc_dc(dev,0)
|
* a BNC interface should work if the enable pin
|
* (dc/dc converter) is on HCB1.
|
* It will be called AUI however.
|
*/
|
|
lp->adapter_cnf = 0;
|
i = readreg(dev, PP_LineCTL);
|
/* Preserve the setting of the HCB1 pin. */
|
if ((i & (HCB1 | HCB1_ENBL)) == (HCB1 | HCB1_ENBL))
|
lp->adapter_cnf |= A_CNF_DC_DC_POLARITY;
|
/* Save the sqelch bit */
|
if ((i & LOW_RX_SQUELCH) == LOW_RX_SQUELCH)
|
lp->adapter_cnf |= A_CNF_EXTND_10B_2 | A_CNF_LOW_RX_SQUELCH;
|
/* Check if the card is in 10Base-t only mode */
|
if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == 0)
|
lp->adapter_cnf |= A_CNF_10B_T | A_CNF_MEDIA_10B_T;
|
/* Check if the card is in AUI only mode */
|
if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUI_ONLY)
|
lp->adapter_cnf |= A_CNF_AUI | A_CNF_MEDIA_AUI;
|
/* Check if the card is in Auto mode. */
|
if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUTO_AUI_10BASET)
|
lp->adapter_cnf |= A_CNF_AUI | A_CNF_10B_T |
|
A_CNF_MEDIA_AUI | A_CNF_MEDIA_10B_T | A_CNF_MEDIA_AUTO;
|
|
cs89_dbg(1, info, "%s: PP_LineCTL=0x%x, adapter_cnf=0x%x\n",
|
dev->name, i, lp->adapter_cnf);
|
|
/* IRQ. Other chips already probe, see below. */
|
if (lp->chip_type == CS8900)
|
lp->isa_config = readreg(dev, PP_CS8900_ISAINT) & INT_NO_MASK;
|
|
pr_cont("[Cirrus EEPROM] ");
|
}
|
|
pr_cont("\n");
|
|
/* First check to see if an EEPROM is attached. */
|
|
if ((readreg(dev, PP_SelfST) & EEPROM_PRESENT) == 0)
|
pr_warn("No EEPROM, relying on command line....\n");
|
else if (get_eeprom_data(dev, START_EEPROM_DATA, CHKSUM_LEN, eeprom_buff) < 0) {
|
pr_warn("EEPROM read failed, relying on command line\n");
|
} else if (get_eeprom_cksum(START_EEPROM_DATA, CHKSUM_LEN, eeprom_buff) < 0) {
|
/* Check if the chip was able to read its own configuration starting
|
at 0 in the EEPROM*/
|
if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) !=
|
(EEPROM_OK | EEPROM_PRESENT))
|
pr_warn("Extended EEPROM checksum bad and no Cirrus EEPROM, relying on command line\n");
|
|
} else {
|
/* This reads an extended EEPROM that is not documented
|
* in the CS8900 datasheet.
|
*/
|
|
/* get transmission control word but keep the autonegotiation bits */
|
if (!lp->auto_neg_cnf)
|
lp->auto_neg_cnf = eeprom_buff[AUTO_NEG_CNF_OFFSET / 2];
|
/* Store adapter configuration */
|
if (!lp->adapter_cnf)
|
lp->adapter_cnf = eeprom_buff[ADAPTER_CNF_OFFSET / 2];
|
/* Store ISA configuration */
|
lp->isa_config = eeprom_buff[ISA_CNF_OFFSET / 2];
|
dev->mem_start = eeprom_buff[PACKET_PAGE_OFFSET / 2] << 8;
|
|
/* eeprom_buff has 32-bit ints, so we can't just memcpy it */
|
/* store the initial memory base address */
|
for (i = 0; i < ETH_ALEN / 2; i++) {
|
dev->dev_addr[i * 2] = eeprom_buff[i];
|
dev->dev_addr[i * 2 + 1] = eeprom_buff[i] >> 8;
|
}
|
cs89_dbg(1, debug, "%s: new adapter_cnf: 0x%x\n",
|
dev->name, lp->adapter_cnf);
|
}
|
|
/* allow them to force multiple transceivers. If they force multiple, autosense */
|
{
|
int count = 0;
|
if (lp->force & FORCE_RJ45) {
|
lp->adapter_cnf |= A_CNF_10B_T;
|
count++;
|
}
|
if (lp->force & FORCE_AUI) {
|
lp->adapter_cnf |= A_CNF_AUI;
|
count++;
|
}
|
if (lp->force & FORCE_BNC) {
|
lp->adapter_cnf |= A_CNF_10B_2;
|
count++;
|
}
|
if (count > 1)
|
lp->adapter_cnf |= A_CNF_MEDIA_AUTO;
|
else if (lp->force & FORCE_RJ45)
|
lp->adapter_cnf |= A_CNF_MEDIA_10B_T;
|
else if (lp->force & FORCE_AUI)
|
lp->adapter_cnf |= A_CNF_MEDIA_AUI;
|
else if (lp->force & FORCE_BNC)
|
lp->adapter_cnf |= A_CNF_MEDIA_10B_2;
|
}
|
|
cs89_dbg(1, debug, "%s: after force 0x%x, adapter_cnf=0x%x\n",
|
dev->name, lp->force, lp->adapter_cnf);
|
|
/* FIXME: We don't let you set dc-dc polarity or low RX squelch from the command line: add it here */
|
|
/* FIXME: We don't let you set the IMM bit from the command line: add it to lp->auto_neg_cnf here */
|
|
/* FIXME: we don't set the Ethernet address on the command line. Use
|
* ifconfig IFACE hw ether AABBCCDDEEFF
|
*/
|
|
pr_info("media %s%s%s",
|
(lp->adapter_cnf & A_CNF_10B_T) ? "RJ-45," : "",
|
(lp->adapter_cnf & A_CNF_AUI) ? "AUI," : "",
|
(lp->adapter_cnf & A_CNF_10B_2) ? "BNC," : "");
|
|
lp->irq_map = 0xffff;
|
|
/* If this is a CS8900 then no pnp soft */
|
if (lp->chip_type != CS8900 &&
|
/* Check if the ISA IRQ has been set */
|
(i = readreg(dev, PP_CS8920_ISAINT) & 0xff,
|
(i != 0 && i < CS8920_NO_INTS))) {
|
if (!dev->irq)
|
dev->irq = i;
|
} else {
|
i = lp->isa_config & INT_NO_MASK;
|
#ifndef CONFIG_CS89x0_PLATFORM
|
if (lp->chip_type == CS8900) {
|
/* Translate the IRQ using the IRQ mapping table. */
|
if (i >= ARRAY_SIZE(cs8900_irq_map))
|
pr_err("invalid ISA interrupt number %d\n", i);
|
else
|
i = cs8900_irq_map[i];
|
|
lp->irq_map = CS8900_IRQ_MAP; /* fixed IRQ map for CS8900 */
|
} else {
|
int irq_map_buff[IRQ_MAP_LEN/2];
|
|
if (get_eeprom_data(dev, IRQ_MAP_EEPROM_DATA,
|
IRQ_MAP_LEN / 2,
|
irq_map_buff) >= 0) {
|
if ((irq_map_buff[0] & 0xff) == PNP_IRQ_FRMT)
|
lp->irq_map = ((irq_map_buff[0] >> 8) |
|
(irq_map_buff[1] << 8));
|
}
|
}
|
#endif
|
if (!dev->irq)
|
dev->irq = i;
|
}
|
|
pr_cont(" IRQ %d", dev->irq);
|
|
#if ALLOW_DMA
|
if (lp->use_dma) {
|
get_dma_channel(dev);
|
pr_cont(", DMA %d", dev->dma);
|
} else
|
#endif
|
pr_cont(", programmed I/O");
|
|
/* print the ethernet address. */
|
pr_cont(", MAC %pM\n", dev->dev_addr);
|
|
dev->netdev_ops = &net_ops;
|
dev->watchdog_timeo = HZ;
|
|
cs89_dbg(0, info, "cs89x0_probe1() successful\n");
|
|
retval = register_netdev(dev);
|
if (retval)
|
goto out2;
|
return 0;
|
out2:
|
iowrite16(PP_ChipID, lp->virt_addr + ADD_PORT);
|
out1:
|
return retval;
|
}
|
|
#ifndef CONFIG_CS89x0_PLATFORM
|
/*
|
* This function converts the I/O port address used by the cs89x0_probe() and
|
* init_module() functions to the I/O memory address used by the
|
* cs89x0_probe1() function.
|
*/
|
static int __init
|
cs89x0_ioport_probe(struct net_device *dev, unsigned long ioport, int modular)
|
{
|
struct net_local *lp = netdev_priv(dev);
|
int ret;
|
void __iomem *io_mem;
|
|
if (!lp)
|
return -ENOMEM;
|
|
dev->base_addr = ioport;
|
|
if (!request_region(ioport, NETCARD_IO_EXTENT, DRV_NAME)) {
|
ret = -EBUSY;
|
goto out;
|
}
|
|
io_mem = ioport_map(ioport & ~3, NETCARD_IO_EXTENT);
|
if (!io_mem) {
|
ret = -ENOMEM;
|
goto release;
|
}
|
|
/* if they give us an odd I/O address, then do ONE write to
|
* the address port, to get it back to address zero, where we
|
* expect to find the EISA signature word. An IO with a base of 0x3
|
* will skip the test for the ADD_PORT.
|
*/
|
if (ioport & 1) {
|
cs89_dbg(1, info, "%s: odd ioaddr 0x%lx\n", dev->name, ioport);
|
if ((ioport & 2) != 2) {
|
if ((ioread16(io_mem + ADD_PORT) & ADD_MASK) !=
|
ADD_SIG) {
|
pr_err("%s: bad signature 0x%x\n",
|
dev->name, ioread16(io_mem + ADD_PORT));
|
ret = -ENODEV;
|
goto unmap;
|
}
|
}
|
}
|
|
ret = cs89x0_probe1(dev, io_mem, modular);
|
if (!ret)
|
goto out;
|
unmap:
|
ioport_unmap(io_mem);
|
release:
|
release_region(ioport, NETCARD_IO_EXTENT);
|
out:
|
return ret;
|
}
|
|
#ifndef MODULE
|
/* Check for a network adaptor of this type, and return '0' iff one exists.
|
* If dev->base_addr == 0, probe all likely locations.
|
* If dev->base_addr == 1, always return failure.
|
* If dev->base_addr == 2, allocate space for the device and return success
|
* (detachable devices only).
|
* Return 0 on success.
|
*/
|
|
struct net_device * __init cs89x0_probe(int unit)
|
{
|
struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
|
unsigned *port;
|
int err = 0;
|
int irq;
|
int io;
|
|
if (!dev)
|
return ERR_PTR(-ENODEV);
|
|
sprintf(dev->name, "eth%d", unit);
|
netdev_boot_setup_check(dev);
|
io = dev->base_addr;
|
irq = dev->irq;
|
|
cs89_dbg(0, info, "cs89x0_probe(0x%x)\n", io);
|
|
if (io > 0x1ff) { /* Check a single specified location. */
|
err = cs89x0_ioport_probe(dev, io, 0);
|
} else if (io != 0) { /* Don't probe at all. */
|
err = -ENXIO;
|
} else {
|
for (port = netcard_portlist; *port; port++) {
|
if (cs89x0_ioport_probe(dev, *port, 0) == 0)
|
break;
|
dev->irq = irq;
|
}
|
if (!*port)
|
err = -ENODEV;
|
}
|
if (err)
|
goto out;
|
return dev;
|
out:
|
free_netdev(dev);
|
pr_warn("no cs8900 or cs8920 detected. Be sure to disable PnP with SETUP\n");
|
return ERR_PTR(err);
|
}
|
#endif
|
#endif
|
|
#if defined(MODULE) && !defined(CONFIG_CS89x0_PLATFORM)
|
|
static struct net_device *dev_cs89x0;
|
|
/* Support the 'debug' module parm even if we're compiled for non-debug to
|
* avoid breaking someone's startup scripts
|
*/
|
|
static int io;
|
static int irq;
|
static int debug;
|
static char media[8];
|
static int duplex = -1;
|
|
static int use_dma; /* These generate unused var warnings if ALLOW_DMA = 0 */
|
static int dma;
|
static int dmasize = 16; /* or 64 */
|
|
module_param_hw(io, int, ioport, 0);
|
module_param_hw(irq, int, irq, 0);
|
module_param(debug, int, 0);
|
module_param_string(media, media, sizeof(media), 0);
|
module_param(duplex, int, 0);
|
module_param_hw(dma , int, dma, 0);
|
module_param(dmasize , int, 0);
|
module_param(use_dma , int, 0);
|
MODULE_PARM_DESC(io, "cs89x0 I/O base address");
|
MODULE_PARM_DESC(irq, "cs89x0 IRQ number");
|
#if DEBUGGING
|
MODULE_PARM_DESC(debug, "cs89x0 debug level (0-6)");
|
#else
|
MODULE_PARM_DESC(debug, "(ignored)");
|
#endif
|
MODULE_PARM_DESC(media, "Set cs89x0 adapter(s) media type(s) (rj45,bnc,aui)");
|
/* No other value than -1 for duplex seems to be currently interpreted */
|
MODULE_PARM_DESC(duplex, "(ignored)");
|
#if ALLOW_DMA
|
MODULE_PARM_DESC(dma , "cs89x0 ISA DMA channel; ignored if use_dma=0");
|
MODULE_PARM_DESC(dmasize , "cs89x0 DMA size in kB (16,64); ignored if use_dma=0");
|
MODULE_PARM_DESC(use_dma , "cs89x0 using DMA (0-1)");
|
#else
|
MODULE_PARM_DESC(dma , "(ignored)");
|
MODULE_PARM_DESC(dmasize , "(ignored)");
|
MODULE_PARM_DESC(use_dma , "(ignored)");
|
#endif
|
|
MODULE_AUTHOR("Mike Cruse, Russwll Nelson <nelson@crynwr.com>, Andrew Morton");
|
MODULE_LICENSE("GPL");
|
|
/*
|
* media=t - specify media type
|
* or media=2
|
* or media=aui
|
* or medai=auto
|
* duplex=0 - specify forced half/full/autonegotiate duplex
|
* debug=# - debug level
|
*
|
* Default Chip Configuration:
|
* DMA Burst = enabled
|
* IOCHRDY Enabled = enabled
|
* UseSA = enabled
|
* CS8900 defaults to half-duplex if not specified on command-line
|
* CS8920 defaults to autoneg if not specified on command-line
|
* Use reset defaults for other config parameters
|
*
|
* Assumptions:
|
* media type specified is supported (circuitry is present)
|
* if memory address is > 1MB, then required mem decode hw is present
|
* if 10B-2, then agent other than driver will enable DC/DC converter
|
* (hw or software util)
|
*/
|
|
int __init init_module(void)
|
{
|
struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
|
struct net_local *lp;
|
int ret = 0;
|
|
#if DEBUGGING
|
net_debug = debug;
|
#else
|
debug = 0;
|
#endif
|
if (!dev)
|
return -ENOMEM;
|
|
dev->irq = irq;
|
dev->base_addr = io;
|
lp = netdev_priv(dev);
|
|
#if ALLOW_DMA
|
if (use_dma) {
|
lp->use_dma = use_dma;
|
lp->dma = dma;
|
lp->dmasize = dmasize;
|
}
|
#endif
|
|
spin_lock_init(&lp->lock);
|
|
/* boy, they'd better get these right */
|
if (!strcmp(media, "rj45"))
|
lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
|
else if (!strcmp(media, "aui"))
|
lp->adapter_cnf = A_CNF_MEDIA_AUI | A_CNF_AUI;
|
else if (!strcmp(media, "bnc"))
|
lp->adapter_cnf = A_CNF_MEDIA_10B_2 | A_CNF_10B_2;
|
else
|
lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
|
|
if (duplex == -1)
|
lp->auto_neg_cnf = AUTO_NEG_ENABLE;
|
|
if (io == 0) {
|
pr_err("Module autoprobing not allowed\n");
|
pr_err("Append io=0xNNN\n");
|
ret = -EPERM;
|
goto out;
|
} else if (io <= 0x1ff) {
|
ret = -ENXIO;
|
goto out;
|
}
|
|
#if ALLOW_DMA
|
if (use_dma && dmasize != 16 && dmasize != 64) {
|
pr_err("dma size must be either 16K or 64K, not %dK\n",
|
dmasize);
|
ret = -EPERM;
|
goto out;
|
}
|
#endif
|
ret = cs89x0_ioport_probe(dev, io, 1);
|
if (ret)
|
goto out;
|
|
dev_cs89x0 = dev;
|
return 0;
|
out:
|
free_netdev(dev);
|
return ret;
|
}
|
|
void __exit
|
cleanup_module(void)
|
{
|
struct net_local *lp = netdev_priv(dev_cs89x0);
|
|
unregister_netdev(dev_cs89x0);
|
iowrite16(PP_ChipID, lp->virt_addr + ADD_PORT);
|
ioport_unmap(lp->virt_addr);
|
release_region(dev_cs89x0->base_addr, NETCARD_IO_EXTENT);
|
free_netdev(dev_cs89x0);
|
}
|
#endif /* MODULE && !CONFIG_CS89x0_PLATFORM */
|
|
#ifdef CONFIG_CS89x0_PLATFORM
|
static int __init cs89x0_platform_probe(struct platform_device *pdev)
|
{
|
struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
|
void __iomem *virt_addr;
|
int err;
|
|
if (!dev)
|
return -ENOMEM;
|
|
dev->irq = platform_get_irq(pdev, 0);
|
if (dev->irq <= 0) {
|
dev_warn(&dev->dev, "interrupt resource missing\n");
|
err = -ENXIO;
|
goto free;
|
}
|
|
virt_addr = devm_platform_ioremap_resource(pdev, 0);
|
if (IS_ERR(virt_addr)) {
|
err = PTR_ERR(virt_addr);
|
goto free;
|
}
|
|
err = cs89x0_probe1(dev, virt_addr, 0);
|
if (err) {
|
dev_warn(&dev->dev, "no cs8900 or cs8920 detected\n");
|
goto free;
|
}
|
|
platform_set_drvdata(pdev, dev);
|
return 0;
|
|
free:
|
free_netdev(dev);
|
return err;
|
}
|
|
static int cs89x0_platform_remove(struct platform_device *pdev)
|
{
|
struct net_device *dev = platform_get_drvdata(pdev);
|
|
/* This platform_get_resource() call will not return NULL, because
|
* the same call in cs89x0_platform_probe() has returned a non NULL
|
* value.
|
*/
|
unregister_netdev(dev);
|
free_netdev(dev);
|
return 0;
|
}
|
|
static const struct of_device_id __maybe_unused cs89x0_match[] = {
|
{ .compatible = "cirrus,cs8900", },
|
{ .compatible = "cirrus,cs8920", },
|
{ },
|
};
|
MODULE_DEVICE_TABLE(of, cs89x0_match);
|
|
static struct platform_driver cs89x0_driver = {
|
.driver = {
|
.name = DRV_NAME,
|
.of_match_table = of_match_ptr(cs89x0_match),
|
},
|
.remove = cs89x0_platform_remove,
|
};
|
|
module_platform_driver_probe(cs89x0_driver, cs89x0_platform_probe);
|
|
#endif /* CONFIG_CS89x0_PLATFORM */
|
|
MODULE_LICENSE("GPL");
|
MODULE_DESCRIPTION("Crystal Semiconductor (Now Cirrus Logic) CS89[02]0 network driver");
|
MODULE_AUTHOR("Russell Nelson <nelson@crynwr.com>");
|
