// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Network device driver for the BMAC ethernet controller on
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* Apple Powermacs. Assumes it's under a DBDMA controller.
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*
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* Copyright (C) 1998 Randy Gobbel.
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*
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* May 1999, Al Viro: proper release of /proc/net/bmac entry, switched to
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* dynamic procfs inode.
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*/
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/delay.h>
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#include <linux/string.h>
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#include <linux/timer.h>
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#include <linux/proc_fs.h>
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#include <linux/init.h>
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#include <linux/spinlock.h>
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#include <linux/crc32.h>
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#include <linux/crc32poly.h>
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#include <linux/bitrev.h>
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#include <linux/ethtool.h>
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#include <linux/slab.h>
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#include <linux/pgtable.h>
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#include <asm/prom.h>
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#include <asm/dbdma.h>
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#include <asm/io.h>
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#include <asm/page.h>
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#include <asm/machdep.h>
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#include <asm/pmac_feature.h>
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#include <asm/macio.h>
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#include <asm/irq.h>
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#include "bmac.h"
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#define trunc_page(x) ((void *)(((unsigned long)(x)) & ~((unsigned long)(PAGE_SIZE - 1))))
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#define round_page(x) trunc_page(((unsigned long)(x)) + ((unsigned long)(PAGE_SIZE - 1)))
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/* switch to use multicast code lifted from sunhme driver */
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#define SUNHME_MULTICAST
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#define N_RX_RING 64
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#define N_TX_RING 32
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#define MAX_TX_ACTIVE 1
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#define ETHERCRC 4
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#define ETHERMINPACKET 64
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#define ETHERMTU 1500
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#define RX_BUFLEN (ETHERMTU + 14 + ETHERCRC + 2)
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#define TX_TIMEOUT HZ /* 1 second */
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/* Bits in transmit DMA status */
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#define TX_DMA_ERR 0x80
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#define XXDEBUG(args)
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struct bmac_data {
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/* volatile struct bmac *bmac; */
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struct sk_buff_head *queue;
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volatile struct dbdma_regs __iomem *tx_dma;
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int tx_dma_intr;
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volatile struct dbdma_regs __iomem *rx_dma;
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int rx_dma_intr;
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volatile struct dbdma_cmd *tx_cmds; /* xmit dma command list */
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volatile struct dbdma_cmd *rx_cmds; /* recv dma command list */
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struct macio_dev *mdev;
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int is_bmac_plus;
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struct sk_buff *rx_bufs[N_RX_RING];
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int rx_fill;
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int rx_empty;
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struct sk_buff *tx_bufs[N_TX_RING];
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int tx_fill;
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int tx_empty;
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unsigned char tx_fullup;
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struct timer_list tx_timeout;
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int timeout_active;
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int sleeping;
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int opened;
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unsigned short hash_use_count[64];
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unsigned short hash_table_mask[4];
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spinlock_t lock;
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};
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#if 0 /* Move that to ethtool */
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typedef struct bmac_reg_entry {
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char *name;
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unsigned short reg_offset;
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} bmac_reg_entry_t;
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#define N_REG_ENTRIES 31
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static bmac_reg_entry_t reg_entries[N_REG_ENTRIES] = {
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{"MEMADD", MEMADD},
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{"MEMDATAHI", MEMDATAHI},
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{"MEMDATALO", MEMDATALO},
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{"TXPNTR", TXPNTR},
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{"RXPNTR", RXPNTR},
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{"IPG1", IPG1},
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{"IPG2", IPG2},
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{"ALIMIT", ALIMIT},
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{"SLOT", SLOT},
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{"PALEN", PALEN},
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{"PAPAT", PAPAT},
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{"TXSFD", TXSFD},
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{"JAM", JAM},
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{"TXCFG", TXCFG},
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{"TXMAX", TXMAX},
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{"TXMIN", TXMIN},
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{"PAREG", PAREG},
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{"DCNT", DCNT},
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{"NCCNT", NCCNT},
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{"NTCNT", NTCNT},
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{"EXCNT", EXCNT},
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{"LTCNT", LTCNT},
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{"TXSM", TXSM},
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{"RXCFG", RXCFG},
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{"RXMAX", RXMAX},
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{"RXMIN", RXMIN},
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{"FRCNT", FRCNT},
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{"AECNT", AECNT},
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{"FECNT", FECNT},
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{"RXSM", RXSM},
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{"RXCV", RXCV}
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};
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#endif
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static unsigned char *bmac_emergency_rxbuf;
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/*
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* Number of bytes of private data per BMAC: allow enough for
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* the rx and tx dma commands plus a branch dma command each,
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* and another 16 bytes to allow us to align the dma command
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* buffers on a 16 byte boundary.
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*/
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#define PRIV_BYTES (sizeof(struct bmac_data) \
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+ (N_RX_RING + N_TX_RING + 4) * sizeof(struct dbdma_cmd) \
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+ sizeof(struct sk_buff_head))
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static int bmac_open(struct net_device *dev);
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static int bmac_close(struct net_device *dev);
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static int bmac_transmit_packet(struct sk_buff *skb, struct net_device *dev);
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static void bmac_set_multicast(struct net_device *dev);
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static void bmac_reset_and_enable(struct net_device *dev);
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static void bmac_start_chip(struct net_device *dev);
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static void bmac_init_chip(struct net_device *dev);
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static void bmac_init_registers(struct net_device *dev);
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static void bmac_enable_and_reset_chip(struct net_device *dev);
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static int bmac_set_address(struct net_device *dev, void *addr);
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static irqreturn_t bmac_misc_intr(int irq, void *dev_id);
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static irqreturn_t bmac_txdma_intr(int irq, void *dev_id);
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static irqreturn_t bmac_rxdma_intr(int irq, void *dev_id);
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static void bmac_set_timeout(struct net_device *dev);
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static void bmac_tx_timeout(struct timer_list *t);
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static netdev_tx_t bmac_output(struct sk_buff *skb, struct net_device *dev);
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static void bmac_start(struct net_device *dev);
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#define DBDMA_SET(x) ( ((x) | (x) << 16) )
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#define DBDMA_CLEAR(x) ( (x) << 16)
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static inline void
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dbdma_st32(volatile __u32 __iomem *a, unsigned long x)
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{
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__asm__ volatile( "stwbrx %0,0,%1" : : "r" (x), "r" (a) : "memory");
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}
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static inline unsigned long
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dbdma_ld32(volatile __u32 __iomem *a)
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{
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__u32 swap;
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__asm__ volatile ("lwbrx %0,0,%1" : "=r" (swap) : "r" (a));
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return swap;
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}
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static void
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dbdma_continue(volatile struct dbdma_regs __iomem *dmap)
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{
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dbdma_st32(&dmap->control,
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DBDMA_SET(RUN|WAKE) | DBDMA_CLEAR(PAUSE|DEAD));
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eieio();
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}
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static void
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dbdma_reset(volatile struct dbdma_regs __iomem *dmap)
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{
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dbdma_st32(&dmap->control,
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DBDMA_CLEAR(ACTIVE|DEAD|WAKE|FLUSH|PAUSE|RUN));
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eieio();
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while (dbdma_ld32(&dmap->status) & RUN)
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eieio();
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}
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static void
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dbdma_setcmd(volatile struct dbdma_cmd *cp,
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unsigned short cmd, unsigned count, unsigned long addr,
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unsigned long cmd_dep)
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{
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out_le16(&cp->command, cmd);
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out_le16(&cp->req_count, count);
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out_le32(&cp->phy_addr, addr);
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out_le32(&cp->cmd_dep, cmd_dep);
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out_le16(&cp->xfer_status, 0);
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out_le16(&cp->res_count, 0);
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}
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static inline
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void bmwrite(struct net_device *dev, unsigned long reg_offset, unsigned data )
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{
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out_le16((void __iomem *)dev->base_addr + reg_offset, data);
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}
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static inline
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unsigned short bmread(struct net_device *dev, unsigned long reg_offset )
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{
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return in_le16((void __iomem *)dev->base_addr + reg_offset);
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}
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static void
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bmac_enable_and_reset_chip(struct net_device *dev)
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{
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struct bmac_data *bp = netdev_priv(dev);
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volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
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volatile struct dbdma_regs __iomem *td = bp->tx_dma;
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if (rd)
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dbdma_reset(rd);
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if (td)
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dbdma_reset(td);
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pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 1);
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}
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#define MIFDELAY udelay(10)
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static unsigned int
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bmac_mif_readbits(struct net_device *dev, int nb)
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{
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unsigned int val = 0;
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while (--nb >= 0) {
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bmwrite(dev, MIFCSR, 0);
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MIFDELAY;
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if (bmread(dev, MIFCSR) & 8)
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val |= 1 << nb;
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bmwrite(dev, MIFCSR, 1);
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MIFDELAY;
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}
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bmwrite(dev, MIFCSR, 0);
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MIFDELAY;
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bmwrite(dev, MIFCSR, 1);
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MIFDELAY;
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return val;
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}
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static void
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bmac_mif_writebits(struct net_device *dev, unsigned int val, int nb)
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{
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int b;
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while (--nb >= 0) {
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b = (val & (1 << nb))? 6: 4;
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bmwrite(dev, MIFCSR, b);
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MIFDELAY;
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bmwrite(dev, MIFCSR, b|1);
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MIFDELAY;
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}
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}
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static unsigned int
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bmac_mif_read(struct net_device *dev, unsigned int addr)
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{
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unsigned int val;
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bmwrite(dev, MIFCSR, 4);
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MIFDELAY;
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bmac_mif_writebits(dev, ~0U, 32);
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bmac_mif_writebits(dev, 6, 4);
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bmac_mif_writebits(dev, addr, 10);
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bmwrite(dev, MIFCSR, 2);
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MIFDELAY;
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bmwrite(dev, MIFCSR, 1);
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MIFDELAY;
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val = bmac_mif_readbits(dev, 17);
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bmwrite(dev, MIFCSR, 4);
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MIFDELAY;
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return val;
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}
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static void
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bmac_mif_write(struct net_device *dev, unsigned int addr, unsigned int val)
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{
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bmwrite(dev, MIFCSR, 4);
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MIFDELAY;
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bmac_mif_writebits(dev, ~0U, 32);
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bmac_mif_writebits(dev, 5, 4);
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bmac_mif_writebits(dev, addr, 10);
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bmac_mif_writebits(dev, 2, 2);
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bmac_mif_writebits(dev, val, 16);
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bmac_mif_writebits(dev, 3, 2);
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}
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static void
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bmac_init_registers(struct net_device *dev)
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{
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struct bmac_data *bp = netdev_priv(dev);
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volatile unsigned short regValue;
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unsigned short *pWord16;
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int i;
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/* XXDEBUG(("bmac: enter init_registers\n")); */
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bmwrite(dev, RXRST, RxResetValue);
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bmwrite(dev, TXRST, TxResetBit);
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i = 100;
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do {
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--i;
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udelay(10000);
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regValue = bmread(dev, TXRST); /* wait for reset to clear..acknowledge */
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} while ((regValue & TxResetBit) && i > 0);
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if (!bp->is_bmac_plus) {
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regValue = bmread(dev, XCVRIF);
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regValue |= ClkBit | SerialMode | COLActiveLow;
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bmwrite(dev, XCVRIF, regValue);
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udelay(10000);
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}
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bmwrite(dev, RSEED, (unsigned short)0x1968);
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regValue = bmread(dev, XIFC);
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regValue |= TxOutputEnable;
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bmwrite(dev, XIFC, regValue);
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bmread(dev, PAREG);
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/* set collision counters to 0 */
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bmwrite(dev, NCCNT, 0);
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bmwrite(dev, NTCNT, 0);
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bmwrite(dev, EXCNT, 0);
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bmwrite(dev, LTCNT, 0);
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/* set rx counters to 0 */
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bmwrite(dev, FRCNT, 0);
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bmwrite(dev, LECNT, 0);
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bmwrite(dev, AECNT, 0);
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bmwrite(dev, FECNT, 0);
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bmwrite(dev, RXCV, 0);
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/* set tx fifo information */
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bmwrite(dev, TXTH, 4); /* 4 octets before tx starts */
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bmwrite(dev, TXFIFOCSR, 0); /* first disable txFIFO */
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bmwrite(dev, TXFIFOCSR, TxFIFOEnable );
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/* set rx fifo information */
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bmwrite(dev, RXFIFOCSR, 0); /* first disable rxFIFO */
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bmwrite(dev, RXFIFOCSR, RxFIFOEnable );
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//bmwrite(dev, TXCFG, TxMACEnable); /* TxNeverGiveUp maybe later */
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bmread(dev, STATUS); /* read it just to clear it */
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/* zero out the chip Hash Filter registers */
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for (i=0; i<4; i++) bp->hash_table_mask[i] = 0;
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bmwrite(dev, BHASH3, bp->hash_table_mask[0]); /* bits 15 - 0 */
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bmwrite(dev, BHASH2, bp->hash_table_mask[1]); /* bits 31 - 16 */
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bmwrite(dev, BHASH1, bp->hash_table_mask[2]); /* bits 47 - 32 */
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bmwrite(dev, BHASH0, bp->hash_table_mask[3]); /* bits 63 - 48 */
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pWord16 = (unsigned short *)dev->dev_addr;
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bmwrite(dev, MADD0, *pWord16++);
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bmwrite(dev, MADD1, *pWord16++);
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bmwrite(dev, MADD2, *pWord16);
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bmwrite(dev, RXCFG, RxCRCNoStrip | RxHashFilterEnable | RxRejectOwnPackets);
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bmwrite(dev, INTDISABLE, EnableNormal);
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}
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#if 0
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static void
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bmac_disable_interrupts(struct net_device *dev)
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{
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bmwrite(dev, INTDISABLE, DisableAll);
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}
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static void
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bmac_enable_interrupts(struct net_device *dev)
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{
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bmwrite(dev, INTDISABLE, EnableNormal);
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}
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#endif
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static void
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bmac_start_chip(struct net_device *dev)
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{
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struct bmac_data *bp = netdev_priv(dev);
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volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
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unsigned short oldConfig;
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/* enable rx dma channel */
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dbdma_continue(rd);
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oldConfig = bmread(dev, TXCFG);
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bmwrite(dev, TXCFG, oldConfig | TxMACEnable );
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/* turn on rx plus any other bits already on (promiscuous possibly) */
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oldConfig = bmread(dev, RXCFG);
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bmwrite(dev, RXCFG, oldConfig | RxMACEnable );
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udelay(20000);
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}
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static void
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bmac_init_phy(struct net_device *dev)
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{
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unsigned int addr;
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struct bmac_data *bp = netdev_priv(dev);
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printk(KERN_DEBUG "phy registers:");
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for (addr = 0; addr < 32; ++addr) {
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if ((addr & 7) == 0)
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printk(KERN_DEBUG);
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printk(KERN_CONT " %.4x", bmac_mif_read(dev, addr));
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}
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printk(KERN_CONT "\n");
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if (bp->is_bmac_plus) {
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unsigned int capable, ctrl;
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ctrl = bmac_mif_read(dev, 0);
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capable = ((bmac_mif_read(dev, 1) & 0xf800) >> 6) | 1;
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if (bmac_mif_read(dev, 4) != capable ||
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(ctrl & 0x1000) == 0) {
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bmac_mif_write(dev, 4, capable);
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bmac_mif_write(dev, 0, 0x1200);
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} else
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bmac_mif_write(dev, 0, 0x1000);
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}
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}
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static void bmac_init_chip(struct net_device *dev)
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{
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bmac_init_phy(dev);
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bmac_init_registers(dev);
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}
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#ifdef CONFIG_PM
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static int bmac_suspend(struct macio_dev *mdev, pm_message_t state)
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{
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struct net_device* dev = macio_get_drvdata(mdev);
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struct bmac_data *bp = netdev_priv(dev);
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unsigned long flags;
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unsigned short config;
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int i;
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netif_device_detach(dev);
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/* prolly should wait for dma to finish & turn off the chip */
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spin_lock_irqsave(&bp->lock, flags);
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if (bp->timeout_active) {
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del_timer(&bp->tx_timeout);
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bp->timeout_active = 0;
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}
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disable_irq(dev->irq);
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disable_irq(bp->tx_dma_intr);
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disable_irq(bp->rx_dma_intr);
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bp->sleeping = 1;
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spin_unlock_irqrestore(&bp->lock, flags);
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if (bp->opened) {
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volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
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volatile struct dbdma_regs __iomem *td = bp->tx_dma;
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config = bmread(dev, RXCFG);
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bmwrite(dev, RXCFG, (config & ~RxMACEnable));
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config = bmread(dev, TXCFG);
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bmwrite(dev, TXCFG, (config & ~TxMACEnable));
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bmwrite(dev, INTDISABLE, DisableAll); /* disable all intrs */
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/* disable rx and tx dma */
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rd->control = cpu_to_le32(DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE)); /* clear run bit */
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td->control = cpu_to_le32(DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE)); /* clear run bit */
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/* free some skb's */
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for (i=0; i<N_RX_RING; i++) {
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if (bp->rx_bufs[i] != NULL) {
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dev_kfree_skb(bp->rx_bufs[i]);
|
bp->rx_bufs[i] = NULL;
|
}
|
}
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for (i = 0; i<N_TX_RING; i++) {
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if (bp->tx_bufs[i] != NULL) {
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dev_kfree_skb(bp->tx_bufs[i]);
|
bp->tx_bufs[i] = NULL;
|
}
|
}
|
}
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pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 0);
|
return 0;
|
}
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static int bmac_resume(struct macio_dev *mdev)
|
{
|
struct net_device* dev = macio_get_drvdata(mdev);
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struct bmac_data *bp = netdev_priv(dev);
|
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/* see if this is enough */
|
if (bp->opened)
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bmac_reset_and_enable(dev);
|
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enable_irq(dev->irq);
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enable_irq(bp->tx_dma_intr);
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enable_irq(bp->rx_dma_intr);
|
netif_device_attach(dev);
|
|
return 0;
|
}
|
#endif /* CONFIG_PM */
|
|
static int bmac_set_address(struct net_device *dev, void *addr)
|
{
|
struct bmac_data *bp = netdev_priv(dev);
|
unsigned char *p = addr;
|
unsigned short *pWord16;
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unsigned long flags;
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int i;
|
|
XXDEBUG(("bmac: enter set_address\n"));
|
spin_lock_irqsave(&bp->lock, flags);
|
|
for (i = 0; i < 6; ++i) {
|
dev->dev_addr[i] = p[i];
|
}
|
/* load up the hardware address */
|
pWord16 = (unsigned short *)dev->dev_addr;
|
bmwrite(dev, MADD0, *pWord16++);
|
bmwrite(dev, MADD1, *pWord16++);
|
bmwrite(dev, MADD2, *pWord16);
|
|
spin_unlock_irqrestore(&bp->lock, flags);
|
XXDEBUG(("bmac: exit set_address\n"));
|
return 0;
|
}
|
|
static inline void bmac_set_timeout(struct net_device *dev)
|
{
|
struct bmac_data *bp = netdev_priv(dev);
|
unsigned long flags;
|
|
spin_lock_irqsave(&bp->lock, flags);
|
if (bp->timeout_active)
|
del_timer(&bp->tx_timeout);
|
bp->tx_timeout.expires = jiffies + TX_TIMEOUT;
|
add_timer(&bp->tx_timeout);
|
bp->timeout_active = 1;
|
spin_unlock_irqrestore(&bp->lock, flags);
|
}
|
|
static void
|
bmac_construct_xmt(struct sk_buff *skb, volatile struct dbdma_cmd *cp)
|
{
|
void *vaddr;
|
unsigned long baddr;
|
unsigned long len;
|
|
len = skb->len;
|
vaddr = skb->data;
|
baddr = virt_to_bus(vaddr);
|
|
dbdma_setcmd(cp, (OUTPUT_LAST | INTR_ALWAYS | WAIT_IFCLR), len, baddr, 0);
|
}
|
|
static void
|
bmac_construct_rxbuff(struct sk_buff *skb, volatile struct dbdma_cmd *cp)
|
{
|
unsigned char *addr = skb? skb->data: bmac_emergency_rxbuf;
|
|
dbdma_setcmd(cp, (INPUT_LAST | INTR_ALWAYS), RX_BUFLEN,
|
virt_to_bus(addr), 0);
|
}
|
|
static void
|
bmac_init_tx_ring(struct bmac_data *bp)
|
{
|
volatile struct dbdma_regs __iomem *td = bp->tx_dma;
|
|
memset((char *)bp->tx_cmds, 0, (N_TX_RING+1) * sizeof(struct dbdma_cmd));
|
|
bp->tx_empty = 0;
|
bp->tx_fill = 0;
|
bp->tx_fullup = 0;
|
|
/* put a branch at the end of the tx command list */
|
dbdma_setcmd(&bp->tx_cmds[N_TX_RING],
|
(DBDMA_NOP | BR_ALWAYS), 0, 0, virt_to_bus(bp->tx_cmds));
|
|
/* reset tx dma */
|
dbdma_reset(td);
|
out_le32(&td->wait_sel, 0x00200020);
|
out_le32(&td->cmdptr, virt_to_bus(bp->tx_cmds));
|
}
|
|
static int
|
bmac_init_rx_ring(struct net_device *dev)
|
{
|
struct bmac_data *bp = netdev_priv(dev);
|
volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
|
int i;
|
struct sk_buff *skb;
|
|
/* initialize list of sk_buffs for receiving and set up recv dma */
|
memset((char *)bp->rx_cmds, 0,
|
(N_RX_RING + 1) * sizeof(struct dbdma_cmd));
|
for (i = 0; i < N_RX_RING; i++) {
|
if ((skb = bp->rx_bufs[i]) == NULL) {
|
bp->rx_bufs[i] = skb = netdev_alloc_skb(dev, RX_BUFLEN + 2);
|
if (skb != NULL)
|
skb_reserve(skb, 2);
|
}
|
bmac_construct_rxbuff(skb, &bp->rx_cmds[i]);
|
}
|
|
bp->rx_empty = 0;
|
bp->rx_fill = i;
|
|
/* Put a branch back to the beginning of the receive command list */
|
dbdma_setcmd(&bp->rx_cmds[N_RX_RING],
|
(DBDMA_NOP | BR_ALWAYS), 0, 0, virt_to_bus(bp->rx_cmds));
|
|
/* start rx dma */
|
dbdma_reset(rd);
|
out_le32(&rd->cmdptr, virt_to_bus(bp->rx_cmds));
|
|
return 1;
|
}
|
|
|
static int bmac_transmit_packet(struct sk_buff *skb, struct net_device *dev)
|
{
|
struct bmac_data *bp = netdev_priv(dev);
|
volatile struct dbdma_regs __iomem *td = bp->tx_dma;
|
int i;
|
|
/* see if there's a free slot in the tx ring */
|
/* XXDEBUG(("bmac_xmit_start: empty=%d fill=%d\n", */
|
/* bp->tx_empty, bp->tx_fill)); */
|
i = bp->tx_fill + 1;
|
if (i >= N_TX_RING)
|
i = 0;
|
if (i == bp->tx_empty) {
|
netif_stop_queue(dev);
|
bp->tx_fullup = 1;
|
XXDEBUG(("bmac_transmit_packet: tx ring full\n"));
|
return -1; /* can't take it at the moment */
|
}
|
|
dbdma_setcmd(&bp->tx_cmds[i], DBDMA_STOP, 0, 0, 0);
|
|
bmac_construct_xmt(skb, &bp->tx_cmds[bp->tx_fill]);
|
|
bp->tx_bufs[bp->tx_fill] = skb;
|
bp->tx_fill = i;
|
|
dev->stats.tx_bytes += skb->len;
|
|
dbdma_continue(td);
|
|
return 0;
|
}
|
|
static int rxintcount;
|
|
static irqreturn_t bmac_rxdma_intr(int irq, void *dev_id)
|
{
|
struct net_device *dev = (struct net_device *) dev_id;
|
struct bmac_data *bp = netdev_priv(dev);
|
volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
|
volatile struct dbdma_cmd *cp;
|
int i, nb, stat;
|
struct sk_buff *skb;
|
unsigned int residual;
|
int last;
|
unsigned long flags;
|
|
spin_lock_irqsave(&bp->lock, flags);
|
|
if (++rxintcount < 10) {
|
XXDEBUG(("bmac_rxdma_intr\n"));
|
}
|
|
last = -1;
|
i = bp->rx_empty;
|
|
while (1) {
|
cp = &bp->rx_cmds[i];
|
stat = le16_to_cpu(cp->xfer_status);
|
residual = le16_to_cpu(cp->res_count);
|
if ((stat & ACTIVE) == 0)
|
break;
|
nb = RX_BUFLEN - residual - 2;
|
if (nb < (ETHERMINPACKET - ETHERCRC)) {
|
skb = NULL;
|
dev->stats.rx_length_errors++;
|
dev->stats.rx_errors++;
|
} else {
|
skb = bp->rx_bufs[i];
|
bp->rx_bufs[i] = NULL;
|
}
|
if (skb != NULL) {
|
nb -= ETHERCRC;
|
skb_put(skb, nb);
|
skb->protocol = eth_type_trans(skb, dev);
|
netif_rx(skb);
|
++dev->stats.rx_packets;
|
dev->stats.rx_bytes += nb;
|
} else {
|
++dev->stats.rx_dropped;
|
}
|
if ((skb = bp->rx_bufs[i]) == NULL) {
|
bp->rx_bufs[i] = skb = netdev_alloc_skb(dev, RX_BUFLEN + 2);
|
if (skb != NULL)
|
skb_reserve(bp->rx_bufs[i], 2);
|
}
|
bmac_construct_rxbuff(skb, &bp->rx_cmds[i]);
|
cp->res_count = cpu_to_le16(0);
|
cp->xfer_status = cpu_to_le16(0);
|
last = i;
|
if (++i >= N_RX_RING) i = 0;
|
}
|
|
if (last != -1) {
|
bp->rx_fill = last;
|
bp->rx_empty = i;
|
}
|
|
dbdma_continue(rd);
|
spin_unlock_irqrestore(&bp->lock, flags);
|
|
if (rxintcount < 10) {
|
XXDEBUG(("bmac_rxdma_intr done\n"));
|
}
|
return IRQ_HANDLED;
|
}
|
|
static int txintcount;
|
|
static irqreturn_t bmac_txdma_intr(int irq, void *dev_id)
|
{
|
struct net_device *dev = (struct net_device *) dev_id;
|
struct bmac_data *bp = netdev_priv(dev);
|
volatile struct dbdma_cmd *cp;
|
int stat;
|
unsigned long flags;
|
|
spin_lock_irqsave(&bp->lock, flags);
|
|
if (txintcount++ < 10) {
|
XXDEBUG(("bmac_txdma_intr\n"));
|
}
|
|
/* del_timer(&bp->tx_timeout); */
|
/* bp->timeout_active = 0; */
|
|
while (1) {
|
cp = &bp->tx_cmds[bp->tx_empty];
|
stat = le16_to_cpu(cp->xfer_status);
|
if (txintcount < 10) {
|
XXDEBUG(("bmac_txdma_xfer_stat=%#0x\n", stat));
|
}
|
if (!(stat & ACTIVE)) {
|
/*
|
* status field might not have been filled by DBDMA
|
*/
|
if (cp == bus_to_virt(in_le32(&bp->tx_dma->cmdptr)))
|
break;
|
}
|
|
if (bp->tx_bufs[bp->tx_empty]) {
|
++dev->stats.tx_packets;
|
dev_consume_skb_irq(bp->tx_bufs[bp->tx_empty]);
|
}
|
bp->tx_bufs[bp->tx_empty] = NULL;
|
bp->tx_fullup = 0;
|
netif_wake_queue(dev);
|
if (++bp->tx_empty >= N_TX_RING)
|
bp->tx_empty = 0;
|
if (bp->tx_empty == bp->tx_fill)
|
break;
|
}
|
|
spin_unlock_irqrestore(&bp->lock, flags);
|
|
if (txintcount < 10) {
|
XXDEBUG(("bmac_txdma_intr done->bmac_start\n"));
|
}
|
|
bmac_start(dev);
|
return IRQ_HANDLED;
|
}
|
|
#ifndef SUNHME_MULTICAST
|
/* Real fast bit-reversal algorithm, 6-bit values */
|
static int reverse6[64] = {
|
0x0,0x20,0x10,0x30,0x8,0x28,0x18,0x38,
|
0x4,0x24,0x14,0x34,0xc,0x2c,0x1c,0x3c,
|
0x2,0x22,0x12,0x32,0xa,0x2a,0x1a,0x3a,
|
0x6,0x26,0x16,0x36,0xe,0x2e,0x1e,0x3e,
|
0x1,0x21,0x11,0x31,0x9,0x29,0x19,0x39,
|
0x5,0x25,0x15,0x35,0xd,0x2d,0x1d,0x3d,
|
0x3,0x23,0x13,0x33,0xb,0x2b,0x1b,0x3b,
|
0x7,0x27,0x17,0x37,0xf,0x2f,0x1f,0x3f
|
};
|
|
static unsigned int
|
crc416(unsigned int curval, unsigned short nxtval)
|
{
|
unsigned int counter, cur = curval, next = nxtval;
|
int high_crc_set, low_data_set;
|
|
/* Swap bytes */
|
next = ((next & 0x00FF) << 8) | (next >> 8);
|
|
/* Compute bit-by-bit */
|
for (counter = 0; counter < 16; ++counter) {
|
/* is high CRC bit set? */
|
if ((cur & 0x80000000) == 0) high_crc_set = 0;
|
else high_crc_set = 1;
|
|
cur = cur << 1;
|
|
if ((next & 0x0001) == 0) low_data_set = 0;
|
else low_data_set = 1;
|
|
next = next >> 1;
|
|
/* do the XOR */
|
if (high_crc_set ^ low_data_set) cur = cur ^ CRC32_POLY_BE;
|
}
|
return cur;
|
}
|
|
static unsigned int
|
bmac_crc(unsigned short *address)
|
{
|
unsigned int newcrc;
|
|
XXDEBUG(("bmac_crc: addr=%#04x, %#04x, %#04x\n", *address, address[1], address[2]));
|
newcrc = crc416(0xffffffff, *address); /* address bits 47 - 32 */
|
newcrc = crc416(newcrc, address[1]); /* address bits 31 - 16 */
|
newcrc = crc416(newcrc, address[2]); /* address bits 15 - 0 */
|
|
return(newcrc);
|
}
|
|
/*
|
* Add requested mcast addr to BMac's hash table filter.
|
*
|
*/
|
|
static void
|
bmac_addhash(struct bmac_data *bp, unsigned char *addr)
|
{
|
unsigned int crc;
|
unsigned short mask;
|
|
if (!(*addr)) return;
|
crc = bmac_crc((unsigned short *)addr) & 0x3f; /* Big-endian alert! */
|
crc = reverse6[crc]; /* Hyperfast bit-reversing algorithm */
|
if (bp->hash_use_count[crc]++) return; /* This bit is already set */
|
mask = crc % 16;
|
mask = (unsigned char)1 << mask;
|
bp->hash_use_count[crc/16] |= mask;
|
}
|
|
static void
|
bmac_removehash(struct bmac_data *bp, unsigned char *addr)
|
{
|
unsigned int crc;
|
unsigned char mask;
|
|
/* Now, delete the address from the filter copy, as indicated */
|
crc = bmac_crc((unsigned short *)addr) & 0x3f; /* Big-endian alert! */
|
crc = reverse6[crc]; /* Hyperfast bit-reversing algorithm */
|
if (bp->hash_use_count[crc] == 0) return; /* That bit wasn't in use! */
|
if (--bp->hash_use_count[crc]) return; /* That bit is still in use */
|
mask = crc % 16;
|
mask = ((unsigned char)1 << mask) ^ 0xffff; /* To turn off bit */
|
bp->hash_table_mask[crc/16] &= mask;
|
}
|
|
/*
|
* Sync the adapter with the software copy of the multicast mask
|
* (logical address filter).
|
*/
|
|
static void
|
bmac_rx_off(struct net_device *dev)
|
{
|
unsigned short rx_cfg;
|
|
rx_cfg = bmread(dev, RXCFG);
|
rx_cfg &= ~RxMACEnable;
|
bmwrite(dev, RXCFG, rx_cfg);
|
do {
|
rx_cfg = bmread(dev, RXCFG);
|
} while (rx_cfg & RxMACEnable);
|
}
|
|
unsigned short
|
bmac_rx_on(struct net_device *dev, int hash_enable, int promisc_enable)
|
{
|
unsigned short rx_cfg;
|
|
rx_cfg = bmread(dev, RXCFG);
|
rx_cfg |= RxMACEnable;
|
if (hash_enable) rx_cfg |= RxHashFilterEnable;
|
else rx_cfg &= ~RxHashFilterEnable;
|
if (promisc_enable) rx_cfg |= RxPromiscEnable;
|
else rx_cfg &= ~RxPromiscEnable;
|
bmwrite(dev, RXRST, RxResetValue);
|
bmwrite(dev, RXFIFOCSR, 0); /* first disable rxFIFO */
|
bmwrite(dev, RXFIFOCSR, RxFIFOEnable );
|
bmwrite(dev, RXCFG, rx_cfg );
|
return rx_cfg;
|
}
|
|
static void
|
bmac_update_hash_table_mask(struct net_device *dev, struct bmac_data *bp)
|
{
|
bmwrite(dev, BHASH3, bp->hash_table_mask[0]); /* bits 15 - 0 */
|
bmwrite(dev, BHASH2, bp->hash_table_mask[1]); /* bits 31 - 16 */
|
bmwrite(dev, BHASH1, bp->hash_table_mask[2]); /* bits 47 - 32 */
|
bmwrite(dev, BHASH0, bp->hash_table_mask[3]); /* bits 63 - 48 */
|
}
|
|
#if 0
|
static void
|
bmac_add_multi(struct net_device *dev,
|
struct bmac_data *bp, unsigned char *addr)
|
{
|
/* XXDEBUG(("bmac: enter bmac_add_multi\n")); */
|
bmac_addhash(bp, addr);
|
bmac_rx_off(dev);
|
bmac_update_hash_table_mask(dev, bp);
|
bmac_rx_on(dev, 1, (dev->flags & IFF_PROMISC)? 1 : 0);
|
/* XXDEBUG(("bmac: exit bmac_add_multi\n")); */
|
}
|
|
static void
|
bmac_remove_multi(struct net_device *dev,
|
struct bmac_data *bp, unsigned char *addr)
|
{
|
bmac_removehash(bp, addr);
|
bmac_rx_off(dev);
|
bmac_update_hash_table_mask(dev, bp);
|
bmac_rx_on(dev, 1, (dev->flags & IFF_PROMISC)? 1 : 0);
|
}
|
#endif
|
|
/* Set or clear the multicast filter for this adaptor.
|
num_addrs == -1 Promiscuous mode, receive all packets
|
num_addrs == 0 Normal mode, clear multicast list
|
num_addrs > 0 Multicast mode, receive normal and MC packets, and do
|
best-effort filtering.
|
*/
|
static void bmac_set_multicast(struct net_device *dev)
|
{
|
struct netdev_hw_addr *ha;
|
struct bmac_data *bp = netdev_priv(dev);
|
int num_addrs = netdev_mc_count(dev);
|
unsigned short rx_cfg;
|
int i;
|
|
if (bp->sleeping)
|
return;
|
|
XXDEBUG(("bmac: enter bmac_set_multicast, n_addrs=%d\n", num_addrs));
|
|
if((dev->flags & IFF_ALLMULTI) || (netdev_mc_count(dev) > 64)) {
|
for (i=0; i<4; i++) bp->hash_table_mask[i] = 0xffff;
|
bmac_update_hash_table_mask(dev, bp);
|
rx_cfg = bmac_rx_on(dev, 1, 0);
|
XXDEBUG(("bmac: all multi, rx_cfg=%#08x\n"));
|
} else if ((dev->flags & IFF_PROMISC) || (num_addrs < 0)) {
|
rx_cfg = bmread(dev, RXCFG);
|
rx_cfg |= RxPromiscEnable;
|
bmwrite(dev, RXCFG, rx_cfg);
|
rx_cfg = bmac_rx_on(dev, 0, 1);
|
XXDEBUG(("bmac: promisc mode enabled, rx_cfg=%#08x\n", rx_cfg));
|
} else {
|
for (i=0; i<4; i++) bp->hash_table_mask[i] = 0;
|
for (i=0; i<64; i++) bp->hash_use_count[i] = 0;
|
if (num_addrs == 0) {
|
rx_cfg = bmac_rx_on(dev, 0, 0);
|
XXDEBUG(("bmac: multi disabled, rx_cfg=%#08x\n", rx_cfg));
|
} else {
|
netdev_for_each_mc_addr(ha, dev)
|
bmac_addhash(bp, ha->addr);
|
bmac_update_hash_table_mask(dev, bp);
|
rx_cfg = bmac_rx_on(dev, 1, 0);
|
XXDEBUG(("bmac: multi enabled, rx_cfg=%#08x\n", rx_cfg));
|
}
|
}
|
/* XXDEBUG(("bmac: exit bmac_set_multicast\n")); */
|
}
|
#else /* ifdef SUNHME_MULTICAST */
|
|
/* The version of set_multicast below was lifted from sunhme.c */
|
|
static void bmac_set_multicast(struct net_device *dev)
|
{
|
struct netdev_hw_addr *ha;
|
unsigned short rx_cfg;
|
u32 crc;
|
|
if((dev->flags & IFF_ALLMULTI) || (netdev_mc_count(dev) > 64)) {
|
bmwrite(dev, BHASH0, 0xffff);
|
bmwrite(dev, BHASH1, 0xffff);
|
bmwrite(dev, BHASH2, 0xffff);
|
bmwrite(dev, BHASH3, 0xffff);
|
} else if(dev->flags & IFF_PROMISC) {
|
rx_cfg = bmread(dev, RXCFG);
|
rx_cfg |= RxPromiscEnable;
|
bmwrite(dev, RXCFG, rx_cfg);
|
} else {
|
u16 hash_table[4] = { 0 };
|
|
rx_cfg = bmread(dev, RXCFG);
|
rx_cfg &= ~RxPromiscEnable;
|
bmwrite(dev, RXCFG, rx_cfg);
|
|
netdev_for_each_mc_addr(ha, dev) {
|
crc = ether_crc_le(6, ha->addr);
|
crc >>= 26;
|
hash_table[crc >> 4] |= 1 << (crc & 0xf);
|
}
|
bmwrite(dev, BHASH0, hash_table[0]);
|
bmwrite(dev, BHASH1, hash_table[1]);
|
bmwrite(dev, BHASH2, hash_table[2]);
|
bmwrite(dev, BHASH3, hash_table[3]);
|
}
|
}
|
#endif /* SUNHME_MULTICAST */
|
|
static int miscintcount;
|
|
static irqreturn_t bmac_misc_intr(int irq, void *dev_id)
|
{
|
struct net_device *dev = (struct net_device *) dev_id;
|
unsigned int status = bmread(dev, STATUS);
|
if (miscintcount++ < 10) {
|
XXDEBUG(("bmac_misc_intr\n"));
|
}
|
/* XXDEBUG(("bmac_misc_intr, status=%#08x\n", status)); */
|
/* bmac_txdma_intr_inner(irq, dev_id); */
|
/* if (status & FrameReceived) dev->stats.rx_dropped++; */
|
if (status & RxErrorMask) dev->stats.rx_errors++;
|
if (status & RxCRCCntExp) dev->stats.rx_crc_errors++;
|
if (status & RxLenCntExp) dev->stats.rx_length_errors++;
|
if (status & RxOverFlow) dev->stats.rx_over_errors++;
|
if (status & RxAlignCntExp) dev->stats.rx_frame_errors++;
|
|
/* if (status & FrameSent) dev->stats.tx_dropped++; */
|
if (status & TxErrorMask) dev->stats.tx_errors++;
|
if (status & TxUnderrun) dev->stats.tx_fifo_errors++;
|
if (status & TxNormalCollExp) dev->stats.collisions++;
|
return IRQ_HANDLED;
|
}
|
|
/*
|
* Procedure for reading EEPROM
|
*/
|
#define SROMAddressLength 5
|
#define DataInOn 0x0008
|
#define DataInOff 0x0000
|
#define Clk 0x0002
|
#define ChipSelect 0x0001
|
#define SDIShiftCount 3
|
#define SD0ShiftCount 2
|
#define DelayValue 1000 /* number of microseconds */
|
#define SROMStartOffset 10 /* this is in words */
|
#define SROMReadCount 3 /* number of words to read from SROM */
|
#define SROMAddressBits 6
|
#define EnetAddressOffset 20
|
|
static unsigned char
|
bmac_clock_out_bit(struct net_device *dev)
|
{
|
unsigned short data;
|
unsigned short val;
|
|
bmwrite(dev, SROMCSR, ChipSelect | Clk);
|
udelay(DelayValue);
|
|
data = bmread(dev, SROMCSR);
|
udelay(DelayValue);
|
val = (data >> SD0ShiftCount) & 1;
|
|
bmwrite(dev, SROMCSR, ChipSelect);
|
udelay(DelayValue);
|
|
return val;
|
}
|
|
static void
|
bmac_clock_in_bit(struct net_device *dev, unsigned int val)
|
{
|
unsigned short data;
|
|
if (val != 0 && val != 1) return;
|
|
data = (val << SDIShiftCount);
|
bmwrite(dev, SROMCSR, data | ChipSelect );
|
udelay(DelayValue);
|
|
bmwrite(dev, SROMCSR, data | ChipSelect | Clk );
|
udelay(DelayValue);
|
|
bmwrite(dev, SROMCSR, data | ChipSelect);
|
udelay(DelayValue);
|
}
|
|
static void
|
reset_and_select_srom(struct net_device *dev)
|
{
|
/* first reset */
|
bmwrite(dev, SROMCSR, 0);
|
udelay(DelayValue);
|
|
/* send it the read command (110) */
|
bmac_clock_in_bit(dev, 1);
|
bmac_clock_in_bit(dev, 1);
|
bmac_clock_in_bit(dev, 0);
|
}
|
|
static unsigned short
|
read_srom(struct net_device *dev, unsigned int addr, unsigned int addr_len)
|
{
|
unsigned short data, val;
|
int i;
|
|
/* send out the address we want to read from */
|
for (i = 0; i < addr_len; i++) {
|
val = addr >> (addr_len-i-1);
|
bmac_clock_in_bit(dev, val & 1);
|
}
|
|
/* Now read in the 16-bit data */
|
data = 0;
|
for (i = 0; i < 16; i++) {
|
val = bmac_clock_out_bit(dev);
|
data <<= 1;
|
data |= val;
|
}
|
bmwrite(dev, SROMCSR, 0);
|
|
return data;
|
}
|
|
/*
|
* It looks like Cogent and SMC use different methods for calculating
|
* checksums. What a pain..
|
*/
|
|
static int
|
bmac_verify_checksum(struct net_device *dev)
|
{
|
unsigned short data, storedCS;
|
|
reset_and_select_srom(dev);
|
data = read_srom(dev, 3, SROMAddressBits);
|
storedCS = ((data >> 8) & 0x0ff) | ((data << 8) & 0xff00);
|
|
return 0;
|
}
|
|
|
static void
|
bmac_get_station_address(struct net_device *dev, unsigned char *ea)
|
{
|
int i;
|
unsigned short data;
|
|
for (i = 0; i < 3; i++)
|
{
|
reset_and_select_srom(dev);
|
data = read_srom(dev, i + EnetAddressOffset/2, SROMAddressBits);
|
ea[2*i] = bitrev8(data & 0x0ff);
|
ea[2*i+1] = bitrev8((data >> 8) & 0x0ff);
|
}
|
}
|
|
static void bmac_reset_and_enable(struct net_device *dev)
|
{
|
struct bmac_data *bp = netdev_priv(dev);
|
unsigned long flags;
|
struct sk_buff *skb;
|
unsigned char *data;
|
|
spin_lock_irqsave(&bp->lock, flags);
|
bmac_enable_and_reset_chip(dev);
|
bmac_init_tx_ring(bp);
|
bmac_init_rx_ring(dev);
|
bmac_init_chip(dev);
|
bmac_start_chip(dev);
|
bmwrite(dev, INTDISABLE, EnableNormal);
|
bp->sleeping = 0;
|
|
/*
|
* It seems that the bmac can't receive until it's transmitted
|
* a packet. So we give it a dummy packet to transmit.
|
*/
|
skb = netdev_alloc_skb(dev, ETHERMINPACKET);
|
if (skb != NULL) {
|
data = skb_put_zero(skb, ETHERMINPACKET);
|
memcpy(data, dev->dev_addr, ETH_ALEN);
|
memcpy(data + ETH_ALEN, dev->dev_addr, ETH_ALEN);
|
bmac_transmit_packet(skb, dev);
|
}
|
spin_unlock_irqrestore(&bp->lock, flags);
|
}
|
|
static const struct ethtool_ops bmac_ethtool_ops = {
|
.get_link = ethtool_op_get_link,
|
};
|
|
static const struct net_device_ops bmac_netdev_ops = {
|
.ndo_open = bmac_open,
|
.ndo_stop = bmac_close,
|
.ndo_start_xmit = bmac_output,
|
.ndo_set_rx_mode = bmac_set_multicast,
|
.ndo_set_mac_address = bmac_set_address,
|
.ndo_validate_addr = eth_validate_addr,
|
};
|
|
static int bmac_probe(struct macio_dev *mdev, const struct of_device_id *match)
|
{
|
int j, rev, ret;
|
struct bmac_data *bp;
|
const unsigned char *prop_addr;
|
unsigned char addr[6];
|
struct net_device *dev;
|
int is_bmac_plus = ((int)match->data) != 0;
|
|
if (macio_resource_count(mdev) != 3 || macio_irq_count(mdev) != 3) {
|
printk(KERN_ERR "BMAC: can't use, need 3 addrs and 3 intrs\n");
|
return -ENODEV;
|
}
|
prop_addr = of_get_property(macio_get_of_node(mdev),
|
"mac-address", NULL);
|
if (prop_addr == NULL) {
|
prop_addr = of_get_property(macio_get_of_node(mdev),
|
"local-mac-address", NULL);
|
if (prop_addr == NULL) {
|
printk(KERN_ERR "BMAC: Can't get mac-address\n");
|
return -ENODEV;
|
}
|
}
|
memcpy(addr, prop_addr, sizeof(addr));
|
|
dev = alloc_etherdev(PRIV_BYTES);
|
if (!dev)
|
return -ENOMEM;
|
|
bp = netdev_priv(dev);
|
SET_NETDEV_DEV(dev, &mdev->ofdev.dev);
|
macio_set_drvdata(mdev, dev);
|
|
bp->mdev = mdev;
|
spin_lock_init(&bp->lock);
|
|
if (macio_request_resources(mdev, "bmac")) {
|
printk(KERN_ERR "BMAC: can't request IO resource !\n");
|
goto out_free;
|
}
|
|
dev->base_addr = (unsigned long)
|
ioremap(macio_resource_start(mdev, 0), macio_resource_len(mdev, 0));
|
if (dev->base_addr == 0)
|
goto out_release;
|
|
dev->irq = macio_irq(mdev, 0);
|
|
bmac_enable_and_reset_chip(dev);
|
bmwrite(dev, INTDISABLE, DisableAll);
|
|
rev = addr[0] == 0 && addr[1] == 0xA0;
|
for (j = 0; j < 6; ++j)
|
dev->dev_addr[j] = rev ? bitrev8(addr[j]): addr[j];
|
|
/* Enable chip without interrupts for now */
|
bmac_enable_and_reset_chip(dev);
|
bmwrite(dev, INTDISABLE, DisableAll);
|
|
dev->netdev_ops = &bmac_netdev_ops;
|
dev->ethtool_ops = &bmac_ethtool_ops;
|
|
bmac_get_station_address(dev, addr);
|
if (bmac_verify_checksum(dev) != 0)
|
goto err_out_iounmap;
|
|
bp->is_bmac_plus = is_bmac_plus;
|
bp->tx_dma = ioremap(macio_resource_start(mdev, 1), macio_resource_len(mdev, 1));
|
if (!bp->tx_dma)
|
goto err_out_iounmap;
|
bp->tx_dma_intr = macio_irq(mdev, 1);
|
bp->rx_dma = ioremap(macio_resource_start(mdev, 2), macio_resource_len(mdev, 2));
|
if (!bp->rx_dma)
|
goto err_out_iounmap_tx;
|
bp->rx_dma_intr = macio_irq(mdev, 2);
|
|
bp->tx_cmds = (volatile struct dbdma_cmd *) DBDMA_ALIGN(bp + 1);
|
bp->rx_cmds = bp->tx_cmds + N_TX_RING + 1;
|
|
bp->queue = (struct sk_buff_head *)(bp->rx_cmds + N_RX_RING + 1);
|
skb_queue_head_init(bp->queue);
|
|
timer_setup(&bp->tx_timeout, bmac_tx_timeout, 0);
|
|
ret = request_irq(dev->irq, bmac_misc_intr, 0, "BMAC-misc", dev);
|
if (ret) {
|
printk(KERN_ERR "BMAC: can't get irq %d\n", dev->irq);
|
goto err_out_iounmap_rx;
|
}
|
ret = request_irq(bp->tx_dma_intr, bmac_txdma_intr, 0, "BMAC-txdma", dev);
|
if (ret) {
|
printk(KERN_ERR "BMAC: can't get irq %d\n", bp->tx_dma_intr);
|
goto err_out_irq0;
|
}
|
ret = request_irq(bp->rx_dma_intr, bmac_rxdma_intr, 0, "BMAC-rxdma", dev);
|
if (ret) {
|
printk(KERN_ERR "BMAC: can't get irq %d\n", bp->rx_dma_intr);
|
goto err_out_irq1;
|
}
|
|
/* Mask chip interrupts and disable chip, will be
|
* re-enabled on open()
|
*/
|
disable_irq(dev->irq);
|
pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 0);
|
|
if (register_netdev(dev) != 0) {
|
printk(KERN_ERR "BMAC: Ethernet registration failed\n");
|
goto err_out_irq2;
|
}
|
|
printk(KERN_INFO "%s: BMAC%s at %pM",
|
dev->name, (is_bmac_plus ? "+" : ""), dev->dev_addr);
|
XXDEBUG((", base_addr=%#0lx", dev->base_addr));
|
printk("\n");
|
|
return 0;
|
|
err_out_irq2:
|
free_irq(bp->rx_dma_intr, dev);
|
err_out_irq1:
|
free_irq(bp->tx_dma_intr, dev);
|
err_out_irq0:
|
free_irq(dev->irq, dev);
|
err_out_iounmap_rx:
|
iounmap(bp->rx_dma);
|
err_out_iounmap_tx:
|
iounmap(bp->tx_dma);
|
err_out_iounmap:
|
iounmap((void __iomem *)dev->base_addr);
|
out_release:
|
macio_release_resources(mdev);
|
out_free:
|
pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 0);
|
free_netdev(dev);
|
|
return -ENODEV;
|
}
|
|
static int bmac_open(struct net_device *dev)
|
{
|
struct bmac_data *bp = netdev_priv(dev);
|
/* XXDEBUG(("bmac: enter open\n")); */
|
/* reset the chip */
|
bp->opened = 1;
|
bmac_reset_and_enable(dev);
|
enable_irq(dev->irq);
|
return 0;
|
}
|
|
static int bmac_close(struct net_device *dev)
|
{
|
struct bmac_data *bp = netdev_priv(dev);
|
volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
|
volatile struct dbdma_regs __iomem *td = bp->tx_dma;
|
unsigned short config;
|
int i;
|
|
bp->sleeping = 1;
|
|
/* disable rx and tx */
|
config = bmread(dev, RXCFG);
|
bmwrite(dev, RXCFG, (config & ~RxMACEnable));
|
|
config = bmread(dev, TXCFG);
|
bmwrite(dev, TXCFG, (config & ~TxMACEnable));
|
|
bmwrite(dev, INTDISABLE, DisableAll); /* disable all intrs */
|
|
/* disable rx and tx dma */
|
rd->control = cpu_to_le32(DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE)); /* clear run bit */
|
td->control = cpu_to_le32(DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE)); /* clear run bit */
|
|
/* free some skb's */
|
XXDEBUG(("bmac: free rx bufs\n"));
|
for (i=0; i<N_RX_RING; i++) {
|
if (bp->rx_bufs[i] != NULL) {
|
dev_kfree_skb(bp->rx_bufs[i]);
|
bp->rx_bufs[i] = NULL;
|
}
|
}
|
XXDEBUG(("bmac: free tx bufs\n"));
|
for (i = 0; i<N_TX_RING; i++) {
|
if (bp->tx_bufs[i] != NULL) {
|
dev_kfree_skb(bp->tx_bufs[i]);
|
bp->tx_bufs[i] = NULL;
|
}
|
}
|
XXDEBUG(("bmac: all bufs freed\n"));
|
|
bp->opened = 0;
|
disable_irq(dev->irq);
|
pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 0);
|
|
return 0;
|
}
|
|
static void
|
bmac_start(struct net_device *dev)
|
{
|
struct bmac_data *bp = netdev_priv(dev);
|
int i;
|
struct sk_buff *skb;
|
unsigned long flags;
|
|
if (bp->sleeping)
|
return;
|
|
spin_lock_irqsave(&bp->lock, flags);
|
while (1) {
|
i = bp->tx_fill + 1;
|
if (i >= N_TX_RING)
|
i = 0;
|
if (i == bp->tx_empty)
|
break;
|
skb = skb_dequeue(bp->queue);
|
if (skb == NULL)
|
break;
|
bmac_transmit_packet(skb, dev);
|
}
|
spin_unlock_irqrestore(&bp->lock, flags);
|
}
|
|
static netdev_tx_t
|
bmac_output(struct sk_buff *skb, struct net_device *dev)
|
{
|
struct bmac_data *bp = netdev_priv(dev);
|
skb_queue_tail(bp->queue, skb);
|
bmac_start(dev);
|
return NETDEV_TX_OK;
|
}
|
|
static void bmac_tx_timeout(struct timer_list *t)
|
{
|
struct bmac_data *bp = from_timer(bp, t, tx_timeout);
|
struct net_device *dev = macio_get_drvdata(bp->mdev);
|
volatile struct dbdma_regs __iomem *td = bp->tx_dma;
|
volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
|
volatile struct dbdma_cmd *cp;
|
unsigned long flags;
|
unsigned short config, oldConfig;
|
int i;
|
|
XXDEBUG(("bmac: tx_timeout called\n"));
|
spin_lock_irqsave(&bp->lock, flags);
|
bp->timeout_active = 0;
|
|
/* update various counters */
|
/* bmac_handle_misc_intrs(bp, 0); */
|
|
cp = &bp->tx_cmds[bp->tx_empty];
|
/* XXDEBUG((KERN_DEBUG "bmac: tx dmastat=%x %x runt=%d pr=%x fs=%x fc=%x\n", */
|
/* le32_to_cpu(td->status), le16_to_cpu(cp->xfer_status), bp->tx_bad_runt, */
|
/* mb->pr, mb->xmtfs, mb->fifofc)); */
|
|
/* turn off both tx and rx and reset the chip */
|
config = bmread(dev, RXCFG);
|
bmwrite(dev, RXCFG, (config & ~RxMACEnable));
|
config = bmread(dev, TXCFG);
|
bmwrite(dev, TXCFG, (config & ~TxMACEnable));
|
out_le32(&td->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE|ACTIVE|DEAD));
|
printk(KERN_ERR "bmac: transmit timeout - resetting\n");
|
bmac_enable_and_reset_chip(dev);
|
|
/* restart rx dma */
|
cp = bus_to_virt(le32_to_cpu(rd->cmdptr));
|
out_le32(&rd->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE|ACTIVE|DEAD));
|
out_le16(&cp->xfer_status, 0);
|
out_le32(&rd->cmdptr, virt_to_bus(cp));
|
out_le32(&rd->control, DBDMA_SET(RUN|WAKE));
|
|
/* fix up the transmit side */
|
XXDEBUG((KERN_DEBUG "bmac: tx empty=%d fill=%d fullup=%d\n",
|
bp->tx_empty, bp->tx_fill, bp->tx_fullup));
|
i = bp->tx_empty;
|
++dev->stats.tx_errors;
|
if (i != bp->tx_fill) {
|
dev_kfree_skb_irq(bp->tx_bufs[i]);
|
bp->tx_bufs[i] = NULL;
|
if (++i >= N_TX_RING) i = 0;
|
bp->tx_empty = i;
|
}
|
bp->tx_fullup = 0;
|
netif_wake_queue(dev);
|
if (i != bp->tx_fill) {
|
cp = &bp->tx_cmds[i];
|
out_le16(&cp->xfer_status, 0);
|
out_le16(&cp->command, OUTPUT_LAST);
|
out_le32(&td->cmdptr, virt_to_bus(cp));
|
out_le32(&td->control, DBDMA_SET(RUN));
|
/* bmac_set_timeout(dev); */
|
XXDEBUG((KERN_DEBUG "bmac: starting %d\n", i));
|
}
|
|
/* turn it back on */
|
oldConfig = bmread(dev, RXCFG);
|
bmwrite(dev, RXCFG, oldConfig | RxMACEnable );
|
oldConfig = bmread(dev, TXCFG);
|
bmwrite(dev, TXCFG, oldConfig | TxMACEnable );
|
|
spin_unlock_irqrestore(&bp->lock, flags);
|
}
|
|
#if 0
|
static void dump_dbdma(volatile struct dbdma_cmd *cp,int count)
|
{
|
int i,*ip;
|
|
for (i=0;i< count;i++) {
|
ip = (int*)(cp+i);
|
|
printk("dbdma req 0x%x addr 0x%x baddr 0x%x xfer/res 0x%x\n",
|
le32_to_cpup(ip+0),
|
le32_to_cpup(ip+1),
|
le32_to_cpup(ip+2),
|
le32_to_cpup(ip+3));
|
}
|
|
}
|
#endif
|
|
#if 0
|
static int
|
bmac_proc_info(char *buffer, char **start, off_t offset, int length)
|
{
|
int len = 0;
|
off_t pos = 0;
|
off_t begin = 0;
|
int i;
|
|
if (bmac_devs == NULL)
|
return -ENOSYS;
|
|
len += sprintf(buffer, "BMAC counters & registers\n");
|
|
for (i = 0; i<N_REG_ENTRIES; i++) {
|
len += sprintf(buffer + len, "%s: %#08x\n",
|
reg_entries[i].name,
|
bmread(bmac_devs, reg_entries[i].reg_offset));
|
pos = begin + len;
|
|
if (pos < offset) {
|
len = 0;
|
begin = pos;
|
}
|
|
if (pos > offset+length) break;
|
}
|
|
*start = buffer + (offset - begin);
|
len -= (offset - begin);
|
|
if (len > length) len = length;
|
|
return len;
|
}
|
#endif
|
|
static int bmac_remove(struct macio_dev *mdev)
|
{
|
struct net_device *dev = macio_get_drvdata(mdev);
|
struct bmac_data *bp = netdev_priv(dev);
|
|
unregister_netdev(dev);
|
|
free_irq(dev->irq, dev);
|
free_irq(bp->tx_dma_intr, dev);
|
free_irq(bp->rx_dma_intr, dev);
|
|
iounmap((void __iomem *)dev->base_addr);
|
iounmap(bp->tx_dma);
|
iounmap(bp->rx_dma);
|
|
macio_release_resources(mdev);
|
|
free_netdev(dev);
|
|
return 0;
|
}
|
|
static const struct of_device_id bmac_match[] =
|
{
|
{
|
.name = "bmac",
|
.data = (void *)0,
|
},
|
{
|
.type = "network",
|
.compatible = "bmac+",
|
.data = (void *)1,
|
},
|
{},
|
};
|
MODULE_DEVICE_TABLE (of, bmac_match);
|
|
static struct macio_driver bmac_driver =
|
{
|
.driver = {
|
.name = "bmac",
|
.owner = THIS_MODULE,
|
.of_match_table = bmac_match,
|
},
|
.probe = bmac_probe,
|
.remove = bmac_remove,
|
#ifdef CONFIG_PM
|
.suspend = bmac_suspend,
|
.resume = bmac_resume,
|
#endif
|
};
|
|
|
static int __init bmac_init(void)
|
{
|
if (bmac_emergency_rxbuf == NULL) {
|
bmac_emergency_rxbuf = kmalloc(RX_BUFLEN, GFP_KERNEL);
|
if (bmac_emergency_rxbuf == NULL)
|
return -ENOMEM;
|
}
|
|
return macio_register_driver(&bmac_driver);
|
}
|
|
static void __exit bmac_exit(void)
|
{
|
macio_unregister_driver(&bmac_driver);
|
|
kfree(bmac_emergency_rxbuf);
|
bmac_emergency_rxbuf = NULL;
|
}
|
|
MODULE_AUTHOR("Randy Gobbel/Paul Mackerras");
|
MODULE_DESCRIPTION("PowerMac BMAC ethernet driver.");
|
MODULE_LICENSE("GPL");
|
|
module_init(bmac_init);
|
module_exit(bmac_exit);
|
