bmac.c
上传用户:lgb322
上传日期:2013-02-24
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文件大小:42k
- /*
- * Network device driver for the BMAC ethernet controller on
- * Apple Powermacs. Assumes it's under a DBDMA controller.
- *
- * Copyright (C) 1998 Randy Gobbel.
- *
- * May 1999, Al Viro: proper release of /proc/net/bmac entry, switched to
- * dynamic procfs inode.
- */
- #include <linux/config.h>
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/netdevice.h>
- #include <linux/etherdevice.h>
- #include <linux/delay.h>
- #include <linux/string.h>
- #include <linux/timer.h>
- #include <linux/proc_fs.h>
- #include <linux/init.h>
- #include <asm/prom.h>
- #include <asm/dbdma.h>
- #include <asm/io.h>
- #include <asm/page.h>
- #include <asm/pgtable.h>
- #include <asm/machdep.h>
- #include <asm/pmac_feature.h>
- #ifdef CONFIG_PMAC_PBOOK
- #include <linux/adb.h>
- #include <linux/pmu.h>
- #include <asm/irq.h>
- #endif
- #include "bmac.h"
- #define trunc_page(x) ((void *)(((unsigned long)(x)) & ~((unsigned long)(PAGE_SIZE - 1))))
- #define round_page(x) trunc_page(((unsigned long)(x)) + ((unsigned long)(PAGE_SIZE - 1)))
- /*
- * CRC polynomial - used in working out multicast filter bits.
- */
- #define ENET_CRCPOLY 0x04c11db7
- /* switch to use multicast code lifted from sunhme driver */
- #define SUNHME_MULTICAST
- #define N_RX_RING 64
- #define N_TX_RING 32
- #define MAX_TX_ACTIVE 1
- #define ETHERCRC 4
- #define ETHERMINPACKET 64
- #define ETHERMTU 1500
- #define RX_BUFLEN (ETHERMTU + 14 + ETHERCRC + 2)
- #define TX_TIMEOUT HZ /* 1 second */
- /* Bits in transmit DMA status */
- #define TX_DMA_ERR 0x80
- #define XXDEBUG(args)
- struct bmac_data {
- /* volatile struct bmac *bmac; */
- struct sk_buff_head *queue;
- volatile struct dbdma_regs *tx_dma;
- int tx_dma_intr;
- volatile struct dbdma_regs *rx_dma;
- int rx_dma_intr;
- volatile struct dbdma_cmd *tx_cmds; /* xmit dma command list */
- volatile struct dbdma_cmd *rx_cmds; /* recv dma command list */
- struct device_node *node;
- int is_bmac_plus;
- struct sk_buff *rx_bufs[N_RX_RING];
- int rx_fill;
- int rx_empty;
- struct sk_buff *tx_bufs[N_TX_RING];
- int tx_fill;
- int tx_empty;
- unsigned char tx_fullup;
- struct net_device_stats stats;
- struct timer_list tx_timeout;
- int timeout_active;
- int sleeping;
- int opened;
- unsigned short hash_use_count[64];
- unsigned short hash_table_mask[4];
- struct net_device *next_bmac;
- };
- typedef struct bmac_reg_entry {
- char *name;
- unsigned short reg_offset;
- } bmac_reg_entry_t;
- #define N_REG_ENTRIES 31
- static bmac_reg_entry_t reg_entries[N_REG_ENTRIES] = {
- {"MEMADD", MEMADD},
- {"MEMDATAHI", MEMDATAHI},
- {"MEMDATALO", MEMDATALO},
- {"TXPNTR", TXPNTR},
- {"RXPNTR", RXPNTR},
- {"IPG1", IPG1},
- {"IPG2", IPG2},
- {"ALIMIT", ALIMIT},
- {"SLOT", SLOT},
- {"PALEN", PALEN},
- {"PAPAT", PAPAT},
- {"TXSFD", TXSFD},
- {"JAM", JAM},
- {"TXCFG", TXCFG},
- {"TXMAX", TXMAX},
- {"TXMIN", TXMIN},
- {"PAREG", PAREG},
- {"DCNT", DCNT},
- {"NCCNT", NCCNT},
- {"NTCNT", NTCNT},
- {"EXCNT", EXCNT},
- {"LTCNT", LTCNT},
- {"TXSM", TXSM},
- {"RXCFG", RXCFG},
- {"RXMAX", RXMAX},
- {"RXMIN", RXMIN},
- {"FRCNT", FRCNT},
- {"AECNT", AECNT},
- {"FECNT", FECNT},
- {"RXSM", RXSM},
- {"RXCV", RXCV}
- };
- static struct net_device *bmac_devs;
- static unsigned char *bmac_emergency_rxbuf;
- #ifdef CONFIG_PMAC_PBOOK
- static int bmac_sleep_notify(struct pmu_sleep_notifier *self, int when);
- static struct pmu_sleep_notifier bmac_sleep_notifier = {
- bmac_sleep_notify, SLEEP_LEVEL_NET,
- };
- #endif
- /*
- * Number of bytes of private data per BMAC: allow enough for
- * the rx and tx dma commands plus a branch dma command each,
- * and another 16 bytes to allow us to align the dma command
- * buffers on a 16 byte boundary.
- */
- #define PRIV_BYTES (sizeof(struct bmac_data)
- + (N_RX_RING + N_TX_RING + 4) * sizeof(struct dbdma_cmd)
- + sizeof(struct sk_buff_head))
- static unsigned char bitrev(unsigned char b);
- static void bmac_probe1(struct device_node *bmac, int is_bmac_plus);
- static int bmac_open(struct net_device *dev);
- static int bmac_close(struct net_device *dev);
- static int bmac_transmit_packet(struct sk_buff *skb, struct net_device *dev);
- static struct net_device_stats *bmac_stats(struct net_device *dev);
- static void bmac_set_multicast(struct net_device *dev);
- static void bmac_reset_and_enable(struct net_device *dev);
- static void bmac_start_chip(struct net_device *dev);
- static void bmac_init_chip(struct net_device *dev);
- static void bmac_init_registers(struct net_device *dev);
- static void bmac_enable_and_reset_chip(struct net_device *dev);
- static int bmac_set_address(struct net_device *dev, void *addr);
- static void bmac_misc_intr(int irq, void *dev_id, struct pt_regs *regs);
- static void bmac_txdma_intr(int irq, void *dev_id, struct pt_regs *regs);
- static void bmac_rxdma_intr(int irq, void *dev_id, struct pt_regs *regs);
- static void bmac_set_timeout(struct net_device *dev);
- static void bmac_tx_timeout(unsigned long data);
- static int bmac_proc_info ( char *buffer, char **start, off_t offset, int length);
- static int bmac_output(struct sk_buff *skb, struct net_device *dev);
- static void bmac_start(struct net_device *dev);
- #define DBDMA_SET(x) ( ((x) | (x) << 16) )
- #define DBDMA_CLEAR(x) ( (x) << 16)
- static inline void
- dbdma_st32(volatile unsigned long *a, unsigned long x)
- {
- __asm__ volatile( "stwbrx %0,0,%1" : : "r" (x), "r" (a) : "memory");
- return;
- }
- static inline unsigned long
- dbdma_ld32(volatile unsigned long *a)
- {
- unsigned long swap;
- __asm__ volatile ("lwbrx %0,0,%1" : "=r" (swap) : "r" (a));
- return swap;
- }
- static void
- dbdma_continue(volatile struct dbdma_regs *dmap)
- {
- dbdma_st32((volatile unsigned long *)&dmap->control,
- DBDMA_SET(RUN|WAKE) | DBDMA_CLEAR(PAUSE|DEAD));
- eieio();
- }
- static void
- dbdma_reset(volatile struct dbdma_regs *dmap)
- {
- dbdma_st32((volatile unsigned long *)&dmap->control,
- DBDMA_CLEAR(ACTIVE|DEAD|WAKE|FLUSH|PAUSE|RUN));
- eieio();
- while (dbdma_ld32((volatile unsigned long *)&dmap->status) & RUN)
- eieio();
- }
- static void
- dbdma_setcmd(volatile struct dbdma_cmd *cp,
- unsigned short cmd, unsigned count, unsigned long addr,
- unsigned long cmd_dep)
- {
- out_le16(&cp->command, cmd);
- out_le16(&cp->req_count, count);
- out_le32(&cp->phy_addr, addr);
- out_le32(&cp->cmd_dep, cmd_dep);
- out_le16(&cp->xfer_status, 0);
- out_le16(&cp->res_count, 0);
- }
- static inline
- void bmwrite(struct net_device *dev, unsigned long reg_offset, unsigned data )
- {
- out_le16((void *)dev->base_addr + reg_offset, data);
- }
- static inline
- volatile unsigned short bmread(struct net_device *dev, unsigned long reg_offset )
- {
- return in_le16((void *)dev->base_addr + reg_offset);
- }
- static void
- bmac_enable_and_reset_chip(struct net_device *dev)
- {
- struct bmac_data *bp = (struct bmac_data *) dev->priv;
- volatile struct dbdma_regs *rd = bp->rx_dma;
- volatile struct dbdma_regs *td = bp->tx_dma;
- if (rd)
- dbdma_reset(rd);
- if (td)
- dbdma_reset(td);
- pmac_call_feature(PMAC_FTR_BMAC_ENABLE, bp->node, 0, 1);
- }
- #define MIFDELAY udelay(10)
- static unsigned int
- bmac_mif_readbits(struct net_device *dev, int nb)
- {
- unsigned int val = 0;
- while (--nb >= 0) {
- bmwrite(dev, MIFCSR, 0);
- MIFDELAY;
- if (bmread(dev, MIFCSR) & 8)
- val |= 1 << nb;
- bmwrite(dev, MIFCSR, 1);
- MIFDELAY;
- }
- bmwrite(dev, MIFCSR, 0);
- MIFDELAY;
- bmwrite(dev, MIFCSR, 1);
- MIFDELAY;
- return val;
- }
- static void
- bmac_mif_writebits(struct net_device *dev, unsigned int val, int nb)
- {
- int b;
- while (--nb >= 0) {
- b = (val & (1 << nb))? 6: 4;
- bmwrite(dev, MIFCSR, b);
- MIFDELAY;
- bmwrite(dev, MIFCSR, b|1);
- MIFDELAY;
- }
- }
- static unsigned int
- bmac_mif_read(struct net_device *dev, unsigned int addr)
- {
- unsigned int val;
- bmwrite(dev, MIFCSR, 4);
- MIFDELAY;
- bmac_mif_writebits(dev, ~0U, 32);
- bmac_mif_writebits(dev, 6, 4);
- bmac_mif_writebits(dev, addr, 10);
- bmwrite(dev, MIFCSR, 2);
- MIFDELAY;
- bmwrite(dev, MIFCSR, 1);
- MIFDELAY;
- val = bmac_mif_readbits(dev, 17);
- bmwrite(dev, MIFCSR, 4);
- MIFDELAY;
- return val;
- }
- static void
- bmac_mif_write(struct net_device *dev, unsigned int addr, unsigned int val)
- {
- bmwrite(dev, MIFCSR, 4);
- MIFDELAY;
- bmac_mif_writebits(dev, ~0U, 32);
- bmac_mif_writebits(dev, 5, 4);
- bmac_mif_writebits(dev, addr, 10);
- bmac_mif_writebits(dev, 2, 2);
- bmac_mif_writebits(dev, val, 16);
- bmac_mif_writebits(dev, 3, 2);
- }
- static void
- bmac_init_registers(struct net_device *dev)
- {
- struct bmac_data *bp = (struct bmac_data *) dev->priv;
- volatile unsigned short regValue;
- unsigned short *pWord16;
- int i;
- /* XXDEBUG(("bmac: enter init_registersn")); */
- bmwrite(dev, RXRST, RxResetValue);
- bmwrite(dev, TXRST, TxResetBit);
- i = 100;
- do {
- --i;
- udelay(10000);
- regValue = bmread(dev, TXRST); /* wait for reset to clear..acknowledge */
- } while ((regValue & TxResetBit) && i > 0);
- if (!bp->is_bmac_plus) {
- regValue = bmread(dev, XCVRIF);
- regValue |= ClkBit | SerialMode | COLActiveLow;
- bmwrite(dev, XCVRIF, regValue);
- udelay(10000);
- }
- bmwrite(dev, RSEED, (unsigned short)0x1968);
- regValue = bmread(dev, XIFC);
- regValue |= TxOutputEnable;
- bmwrite(dev, XIFC, regValue);
- bmread(dev, PAREG);
- /* set collision counters to 0 */
- bmwrite(dev, NCCNT, 0);
- bmwrite(dev, NTCNT, 0);
- bmwrite(dev, EXCNT, 0);
- bmwrite(dev, LTCNT, 0);
- /* set rx counters to 0 */
- bmwrite(dev, FRCNT, 0);
- bmwrite(dev, LECNT, 0);
- bmwrite(dev, AECNT, 0);
- bmwrite(dev, FECNT, 0);
- bmwrite(dev, RXCV, 0);
- /* set tx fifo information */
- bmwrite(dev, TXTH, 4); /* 4 octets before tx starts */
- bmwrite(dev, TXFIFOCSR, 0); /* first disable txFIFO */
- bmwrite(dev, TXFIFOCSR, TxFIFOEnable );
- /* set rx fifo information */
- bmwrite(dev, RXFIFOCSR, 0); /* first disable rxFIFO */
- bmwrite(dev, RXFIFOCSR, RxFIFOEnable );
- //bmwrite(dev, TXCFG, TxMACEnable); /* TxNeverGiveUp maybe later */
- bmread(dev, STATUS); /* read it just to clear it */
- /* zero out the chip Hash Filter registers */
- for (i=0; i<4; i++) bp->hash_table_mask[i] = 0;
- 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 */
-
- pWord16 = (unsigned short *)dev->dev_addr;
- bmwrite(dev, MADD0, *pWord16++);
- bmwrite(dev, MADD1, *pWord16++);
- bmwrite(dev, MADD2, *pWord16);
- bmwrite(dev, RXCFG, RxCRCNoStrip | RxHashFilterEnable | RxRejectOwnPackets);
- bmwrite(dev, INTDISABLE, EnableNormal);
- return;
- }
- #if 0
- static void
- bmac_disable_interrupts(struct net_device *dev)
- {
- bmwrite(dev, INTDISABLE, DisableAll);
- }
- static void
- bmac_enable_interrupts(struct net_device *dev)
- {
- bmwrite(dev, INTDISABLE, EnableNormal);
- }
- #endif
- static void
- bmac_start_chip(struct net_device *dev)
- {
- struct bmac_data *bp = (struct bmac_data *) dev->priv;
- volatile struct dbdma_regs *rd = bp->rx_dma;
- unsigned short oldConfig;
- /* enable rx dma channel */
- dbdma_continue(rd);
- oldConfig = bmread(dev, TXCFG);
- bmwrite(dev, TXCFG, oldConfig | TxMACEnable );
- /* turn on rx plus any other bits already on (promiscuous possibly) */
- oldConfig = bmread(dev, RXCFG);
- bmwrite(dev, RXCFG, oldConfig | RxMACEnable );
- udelay(20000);
- }
- static void
- bmac_init_phy(struct net_device *dev)
- {
- unsigned int addr;
- struct bmac_data *bp = (struct bmac_data *) dev->priv;
- printk(KERN_DEBUG "phy registers:");
- for (addr = 0; addr < 32; ++addr) {
- if ((addr & 7) == 0)
- printk("n" KERN_DEBUG);
- printk(" %.4x", bmac_mif_read(dev, addr));
- }
- printk("n");
- if (bp->is_bmac_plus) {
- unsigned int capable, ctrl;
- ctrl = bmac_mif_read(dev, 0);
- capable = ((bmac_mif_read(dev, 1) & 0xf800) >> 6) | 1;
- if (bmac_mif_read(dev, 4) != capable
- || (ctrl & 0x1000) == 0) {
- bmac_mif_write(dev, 4, capable);
- bmac_mif_write(dev, 0, 0x1200);
- } else
- bmac_mif_write(dev, 0, 0x1000);
- }
- }
- static void
- bmac_init_chip(struct net_device *dev)
- {
- bmac_init_phy(dev);
- bmac_init_registers(dev);
- }
- #ifdef CONFIG_PMAC_PBOOK
- static int
- bmac_sleep_notify(struct pmu_sleep_notifier *self, int when)
- {
- struct bmac_data *bp;
- unsigned long flags;
- unsigned short config;
- struct net_device* dev = bmac_devs;
- int i;
-
- if (bmac_devs == 0)
- return PBOOK_SLEEP_OK;
-
- bp = (struct bmac_data *) dev->priv;
-
- switch (when) {
- case PBOOK_SLEEP_REQUEST:
- break;
- case PBOOK_SLEEP_REJECT:
- break;
- case PBOOK_SLEEP_NOW:
- netif_device_detach(dev);
- /* prolly should wait for dma to finish & turn off the chip */
- save_flags(flags); cli();
- if (bp->timeout_active) {
- del_timer(&bp->tx_timeout);
- bp->timeout_active = 0;
- }
- disable_irq(dev->irq);
- disable_irq(bp->tx_dma_intr);
- disable_irq(bp->rx_dma_intr);
- bp->sleeping = 1;
- restore_flags(flags);
- if (bp->opened) {
- volatile struct dbdma_regs *rd = bp->rx_dma;
- volatile struct dbdma_regs *td = bp->tx_dma;
-
- 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 */
- st_le32(&rd->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE)); /* clear run bit */
- st_le32(&td->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE)); /* clear run bit */
- /* free some skb's */
- 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;
- }
- }
- 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;
- }
- }
- }
- pmac_call_feature(PMAC_FTR_BMAC_ENABLE, bp->node, 0, 0);
- break;
- case PBOOK_WAKE:
- /* see if this is enough */
- if (bp->opened)
- bmac_reset_and_enable(dev);
- enable_irq(dev->irq);
- enable_irq(bp->tx_dma_intr);
- enable_irq(bp->rx_dma_intr);
- netif_device_attach(dev);
- break;
- }
- return PBOOK_SLEEP_OK;
- }
- #endif
- static int bmac_set_address(struct net_device *dev, void *addr)
- {
- unsigned char *p = addr;
- unsigned short *pWord16;
- unsigned long flags;
- int i;
- XXDEBUG(("bmac: enter set_addressn"));
- save_flags(flags); cli();
- 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);
- restore_flags(flags);
- XXDEBUG(("bmac: exit set_addressn"));
- return 0;
- }
- static inline void bmac_set_timeout(struct net_device *dev)
- {
- struct bmac_data *bp = (struct bmac_data *) dev->priv;
- unsigned long flags;
- save_flags(flags);
- cli();
- if (bp->timeout_active)
- del_timer(&bp->tx_timeout);
- bp->tx_timeout.expires = jiffies + TX_TIMEOUT;
- bp->tx_timeout.function = bmac_tx_timeout;
- bp->tx_timeout.data = (unsigned long) dev;
- add_timer(&bp->tx_timeout);
- bp->timeout_active = 1;
- restore_flags(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);
- }
- /* Bit-reverse one byte of an ethernet hardware address. */
- static unsigned char
- bitrev(unsigned char b)
- {
- int d = 0, i;
- for (i = 0; i < 8; ++i, b >>= 1)
- d = (d << 1) | (b & 1);
- return d;
- }
- static void
- bmac_init_tx_ring(struct bmac_data *bp)
- {
- volatile struct dbdma_regs *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 bmac_data *bp)
- {
- volatile struct dbdma_regs *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 = dev_alloc_skb(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 = (struct bmac_data *) dev->priv;
- volatile struct dbdma_regs *td = bp->tx_dma;
- int i;
- /* see if there's a free slot in the tx ring */
- /* XXDEBUG(("bmac_xmit_start: empty=%d fill=%dn", */
- /* 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 fulln"));
- 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;
- bp->stats.tx_bytes += skb->len;
- dbdma_continue(td);
- return 0;
- }
- static int rxintcount;
- static void bmac_rxdma_intr(int irq, void *dev_id, struct pt_regs *regs)
- {
- struct net_device *dev = (struct net_device *) dev_id;
- struct bmac_data *bp = (struct bmac_data *) dev->priv;
- volatile struct dbdma_regs *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;
- save_flags(flags); cli();
- if (++rxintcount < 10) {
- XXDEBUG(("bmac_rxdma_intrn"));
- }
- last = -1;
- i = bp->rx_empty;
- while (1) {
- cp = &bp->rx_cmds[i];
- stat = ld_le16(&cp->xfer_status);
- residual = ld_le16(&cp->res_count);
- if ((stat & ACTIVE) == 0)
- break;
- nb = RX_BUFLEN - residual - 2;
- if (nb < (ETHERMINPACKET - ETHERCRC)) {
- skb = NULL;
- bp->stats.rx_length_errors++;
- bp->stats.rx_errors++;
- } else {
- skb = bp->rx_bufs[i];
- bp->rx_bufs[i] = NULL;
- }
- if (skb != NULL) {
- nb -= ETHERCRC;
- skb_put(skb, nb);
- skb->dev = dev;
- skb->protocol = eth_type_trans(skb, dev);
- netif_rx(skb);
- dev->last_rx = jiffies;
- ++bp->stats.rx_packets;
- bp->stats.rx_bytes += nb;
- } else {
- ++bp->stats.rx_dropped;
- }
- dev->last_rx = jiffies;
- if ((skb = bp->rx_bufs[i]) == NULL) {
- bp->rx_bufs[i] = skb = dev_alloc_skb(RX_BUFLEN+2);
- if (skb != NULL)
- skb_reserve(bp->rx_bufs[i], 2);
- }
- bmac_construct_rxbuff(skb, &bp->rx_cmds[i]);
- st_le16(&cp->res_count, 0);
- st_le16(&cp->xfer_status, 0);
- last = i;
- if (++i >= N_RX_RING) i = 0;
- }
- if (last != -1) {
- bp->rx_fill = last;
- bp->rx_empty = i;
- }
- restore_flags(flags);
- dbdma_continue(rd);
- if (rxintcount < 10) {
- XXDEBUG(("bmac_rxdma_intr donen"));
- }
- }
- static int txintcount;
- static void bmac_txdma_intr(int irq, void *dev_id, struct pt_regs *regs)
- {
- struct net_device *dev = (struct net_device *) dev_id;
- struct bmac_data *bp = (struct bmac_data *) dev->priv;
- volatile struct dbdma_cmd *cp;
- int stat;
- unsigned long flags;
- save_flags(flags); cli();
- if (txintcount++ < 10) {
- XXDEBUG(("bmac_txdma_intrn"));
- }
- /* del_timer(&bp->tx_timeout); */
- /* bp->timeout_active = 0; */
- while (1) {
- cp = &bp->tx_cmds[bp->tx_empty];
- stat = ld_le16(&cp->xfer_status);
- if (txintcount < 10) {
- XXDEBUG(("bmac_txdma_xfer_stat=%#0xn", 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]) {
- ++bp->stats.tx_packets;
- dev_kfree_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;
- }
- restore_flags(flags);
- if (txintcount < 10) {
- XXDEBUG(("bmac_txdma_intr done->bmac_startn"));
- }
- bmac_start(dev);
- }
- static struct net_device_stats *bmac_stats(struct net_device *dev)
- {
- struct bmac_data *p = (struct bmac_data *) dev->priv;
- return &p->stats;
- }
- #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)
- {
- register unsigned int counter, cur = curval, next = nxtval;
- register 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 ^ ENET_CRCPOLY;
- }
- return cur;
- }
- static unsigned int
- bmac_crc(unsigned short *address)
- {
- unsigned int newcrc;
- XXDEBUG(("bmac_crc: addr=%#04x, %#04x, %#04xn", *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_multin")); */
- 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_multin")); */
- }
- 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 dev_mc_list *dmi;
- struct bmac_data *bp = (struct bmac_data *) dev->priv;
- int num_addrs = dev->mc_count;
- unsigned short rx_cfg;
- int i;
- if (bp->sleeping)
- return;
- XXDEBUG(("bmac: enter bmac_set_multicast, n_addrs=%dn", num_addrs));
- if((dev->flags & IFF_ALLMULTI) || (dev->mc_count > 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=%#08xn"));
- } 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=%#08xn", 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=%#08xn", rx_cfg));
- } else {
- for (dmi=dev->mc_list; dmi!=NULL; dmi=dmi->next)
- bmac_addhash(bp, dmi->dmi_addr);
- bmac_update_hash_table_mask(dev, bp);
- rx_cfg = bmac_rx_on(dev, 1, 0);
- XXDEBUG(("bmac: multi enabled, rx_cfg=%#08xn", rx_cfg));
- }
- }
- /* XXDEBUG(("bmac: exit bmac_set_multicastn")); */
- }
- #else /* ifdef SUNHME_MULTICAST */
- /* The version of set_multicast below was lifted from sunhme.c */
- #define CRC_POLYNOMIAL_BE 0x04c11db7UL /* Ethernet CRC, big endian */
- #define CRC_POLYNOMIAL_LE 0xedb88320UL /* Ethernet CRC, little endian */
- static void bmac_set_multicast(struct net_device *dev)
- {
- struct dev_mc_list *dmi = dev->mc_list;
- char *addrs;
- int i, j, bit, byte;
- unsigned short rx_cfg;
- u32 crc, poly = CRC_POLYNOMIAL_LE;
- if((dev->flags & IFF_ALLMULTI) || (dev->mc_count > 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];
-
- rx_cfg = bmread(dev, RXCFG);
- rx_cfg &= ~RxPromiscEnable;
- bmwrite(dev, RXCFG, rx_cfg);
- for(i = 0; i < 4; i++) hash_table[i] = 0;
-
- for(i = 0; i < dev->mc_count; i++) {
- addrs = dmi->dmi_addr;
- dmi = dmi->next;
- if(!(*addrs & 1))
- continue;
- crc = 0xffffffffU;
- for(byte = 0; byte < 6; byte++) {
- for(bit = *addrs++, j = 0; j < 8; j++, bit >>= 1) {
- int test;
- test = ((bit ^ crc) & 0x01);
- crc >>= 1;
- if(test)
- crc = crc ^ poly;
- }
- }
- 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 void bmac_misc_intr(int irq, void *dev_id, struct pt_regs *regs)
- {
- struct net_device *dev = (struct net_device *) dev_id;
- struct bmac_data *bp = (struct bmac_data *)dev->priv;
- unsigned int status = bmread(dev, STATUS);
- if (miscintcount++ < 10) {
- XXDEBUG(("bmac_misc_intrn"));
- }
- /* XXDEBUG(("bmac_misc_intr, status=%#08xn", status)); */
- /* bmac_txdma_intr_inner(irq, dev_id, regs); */
- /* if (status & FrameReceived) bp->stats.rx_dropped++; */
- if (status & RxErrorMask) bp->stats.rx_errors++;
- if (status & RxCRCCntExp) bp->stats.rx_crc_errors++;
- if (status & RxLenCntExp) bp->stats.rx_length_errors++;
- if (status & RxOverFlow) bp->stats.rx_over_errors++;
- if (status & RxAlignCntExp) bp->stats.rx_frame_errors++;
- /* if (status & FrameSent) bp->stats.tx_dropped++; */
- if (status & TxErrorMask) bp->stats.tx_errors++;
- if (status & TxUnderrun) bp->stats.tx_fifo_errors++;
- if (status & TxNormalCollExp) bp->stats.collisions++;
- }
- /*
- * 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 < 6; i++)
- {
- reset_and_select_srom(dev);
- data = read_srom(dev, i + EnetAddressOffset/2, SROMAddressBits);
- ea[2*i] = bitrev(data & 0x0ff);
- ea[2*i+1] = bitrev((data >> 8) & 0x0ff);
- }
- }
- static void bmac_reset_and_enable(struct net_device *dev)
- {
- struct bmac_data *bp = dev->priv;
- unsigned long flags;
- struct sk_buff *skb;
- unsigned char *data;
- save_flags(flags); cli();
- bmac_enable_and_reset_chip(dev);
- bmac_init_tx_ring(bp);
- bmac_init_rx_ring(bp);
- 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 = dev_alloc_skb(ETHERMINPACKET);
- if (skb != NULL) {
- data = skb_put(skb, ETHERMINPACKET);
- memset(data, 0, ETHERMINPACKET);
- memcpy(data, dev->dev_addr, 6);
- memcpy(data+6, dev->dev_addr, 6);
- bmac_transmit_packet(skb, dev);
- }
- restore_flags(flags);
- }
- static int __init bmac_probe(void)
- {
- struct device_node *bmac;
- MOD_INC_USE_COUNT;
- for (bmac = find_devices("bmac"); bmac != 0; bmac = bmac->next)
- bmac_probe1(bmac, 0);
- for (bmac = find_compatible_devices("network", "bmac+"); bmac != 0;
- bmac = bmac->next)
- bmac_probe1(bmac, 1);
- if (bmac_devs != 0) {
- proc_net_create ("bmac", 0, bmac_proc_info);
- #ifdef CONFIG_PMAC_PBOOK
- pmu_register_sleep_notifier(&bmac_sleep_notifier);
- #endif
- }
- MOD_DEC_USE_COUNT;
- return bmac_devs? 0: -ENODEV;
- }
- static void __init bmac_probe1(struct device_node *bmac, int is_bmac_plus)
- {
- int j, rev, ret;
- struct bmac_data *bp;
- unsigned char *addr;
- struct net_device *dev;
- if (bmac->n_addrs != 3 || bmac->n_intrs != 3) {
- printk(KERN_ERR "can't use BMAC %s: need 3 addrs and 3 intrsn",
- bmac->full_name);
- return;
- }
- addr = get_property(bmac, "mac-address", NULL);
- if (addr == NULL) {
- addr = get_property(bmac, "local-mac-address", NULL);
- if (addr == NULL) {
- printk(KERN_ERR "Can't get mac-address for BMAC %sn",
- bmac->full_name);
- return;
- }
- }
- if (bmac_emergency_rxbuf == NULL) {
- bmac_emergency_rxbuf = kmalloc(RX_BUFLEN, GFP_KERNEL);
- if (bmac_emergency_rxbuf == NULL) {
- printk(KERN_ERR "BMAC: can't allocate emergency RX buffern");
- return;
- }
- }
- dev = init_etherdev(NULL, PRIV_BYTES);
- if (!dev) {
- printk(KERN_ERR "init_etherdev failed, out of memory for BMAC %sn",
- bmac->full_name);
- return;
- }
- bp = (struct bmac_data *) dev->priv;
- SET_MODULE_OWNER(dev);
- bp->node = bmac;
- if (!request_OF_resource(bmac, 0, " (bmac)")) {
- printk(KERN_ERR "BMAC: can't request IO resource !n");
- goto err_out;
- }
- if (!request_OF_resource(bmac, 1, " (bmac tx dma)")) {
- printk(KERN_ERR "BMAC: can't request TX DMA resource !n");
- goto err_out;
- }
- if (!request_OF_resource(bmac, 2, " (bmac rx dma)")) {
- printk(KERN_ERR "BMAC: can't request RX DMA resource !n");
- goto err_out;
- }
- dev->base_addr = (unsigned long)
- ioremap(bmac->addrs[0].address, bmac->addrs[0].size);
- if (!dev->base_addr)
- goto err_out;
- dev->irq = bmac->intrs[0].line;
- bmac_enable_and_reset_chip(dev);
- bmwrite(dev, INTDISABLE, DisableAll);
- printk(KERN_INFO "%s: BMAC%s at", dev->name, (is_bmac_plus? "+": ""));
- rev = addr[0] == 0 && addr[1] == 0xA0;
- for (j = 0; j < 6; ++j) {
- dev->dev_addr[j] = rev? bitrev(addr[j]): addr[j];
- printk("%c%.2x", (j? ':': ' '), dev->dev_addr[j]);
- }
- XXDEBUG((", base_addr=%#0lx", dev->base_addr));
- printk("n");
- /* Enable chip without interrupts for now */
- bmac_enable_and_reset_chip(dev);
- bmwrite(dev, INTDISABLE, DisableAll);
- dev->open = bmac_open;
- dev->stop = bmac_close;
- dev->hard_start_xmit = bmac_output;
- dev->get_stats = bmac_stats;
- dev->set_multicast_list = bmac_set_multicast;
- dev->set_mac_address = bmac_set_address;
- 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 = (volatile struct dbdma_regs *)
- ioremap(bmac->addrs[1].address, bmac->addrs[1].size);
- if (!bp->tx_dma)
- goto err_out_iounmap;
- bp->tx_dma_intr = bmac->intrs[1].line;
- bp->rx_dma = (volatile struct dbdma_regs *)
- ioremap(bmac->addrs[2].address, bmac->addrs[2].size);
- if (!bp->rx_dma)
- goto err_out_iounmap_tx;
- bp->rx_dma_intr = bmac->intrs[2].line;
- 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);
- memset((char *) bp->tx_cmds, 0,
- (N_TX_RING + N_RX_RING + 2) * sizeof(struct dbdma_cmd));
- /* init_timer(&bp->tx_timeout); */
- /* bp->timeout_active = 0; */
- ret = request_irq(dev->irq, bmac_misc_intr, 0, "BMAC-misc", dev);
- if (ret) {
- printk(KERN_ERR "BMAC: can't get irq %dn", dev->irq);
- goto err_out_iounmap_rx;
- }
- ret = request_irq(bmac->intrs[1].line, bmac_txdma_intr, 0, "BMAC-txdma", dev);
- if (ret) {
- printk(KERN_ERR "BMAC: can't get irq %dn", bmac->intrs[1].line);
- goto err_out_irq0;
- }
- ret = request_irq(bmac->intrs[2].line, bmac_rxdma_intr, 0, "BMAC-rxdma", dev);
- if (ret) {
- printk(KERN_ERR "BMAC: can't get irq %dn", bmac->intrs[2].line);
- 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, bp->node, 0, 0);
-
- bp->next_bmac = bmac_devs;
- bmac_devs = dev;
- return;
- err_out_irq1:
- free_irq(bmac->intrs[1].line, dev);
- err_out_irq0:
- free_irq(dev->irq, dev);
- err_out_iounmap_rx:
- iounmap((void *)bp->rx_dma);
- err_out_iounmap_tx:
- iounmap((void *)bp->tx_dma);
- err_out_iounmap:
- iounmap((void *)dev->base_addr);
- err_out:
- if (bp->node) {
- release_OF_resource(bp->node, 0);
- release_OF_resource(bp->node, 1);
- release_OF_resource(bp->node, 2);
- pmac_call_feature(PMAC_FTR_BMAC_ENABLE, bp->node, 0, 0);
- }
- unregister_netdev(dev);
- kfree(dev);
- }
- static int bmac_open(struct net_device *dev)
- {
- struct bmac_data *bp = (struct bmac_data *) dev->priv;
- /* XXDEBUG(("bmac: enter openn")); */
- /* reset the chip */
- bp->opened = 1;
- bmac_reset_and_enable(dev);
- enable_irq(dev->irq);
- dev->flags |= IFF_RUNNING;
- return 0;
- }
- static int bmac_close(struct net_device *dev)
- {
- struct bmac_data *bp = (struct bmac_data *) dev->priv;
- volatile struct dbdma_regs *rd = bp->rx_dma;
- volatile struct dbdma_regs *td = bp->tx_dma;
- unsigned short config;
- int i;
- bp->sleeping = 1;
- dev->flags &= ~(IFF_UP | IFF_RUNNING);
- /* 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 */
- st_le32(&rd->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE)); /* clear run bit */
- st_le32(&td->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE)); /* clear run bit */
- /* free some skb's */
- XXDEBUG(("bmac: free rx bufsn"));
- 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 bufsn"));
- 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 freedn"));
- bp->opened = 0;
- disable_irq(dev->irq);
- pmac_call_feature(PMAC_FTR_BMAC_ENABLE, bp->node, 0, 0);
- return 0;
- }
- static void
- bmac_start(struct net_device *dev)
- {
- struct bmac_data *bp = dev->priv;
- int i;
- struct sk_buff *skb;
- unsigned long flags;
- if (bp->sleeping)
- return;
-
- save_flags(flags); cli();
- 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);
- }
- restore_flags(flags);
- }
- static int
- bmac_output(struct sk_buff *skb, struct net_device *dev)
- {
- struct bmac_data *bp = dev->priv;
- skb_queue_tail(bp->queue, skb);
- bmac_start(dev);
- return 0;
- }
- static void bmac_tx_timeout(unsigned long data)
- {
- struct net_device *dev = (struct net_device *) data;
- struct bmac_data *bp = (struct bmac_data *) dev->priv;
- volatile struct dbdma_regs *td = bp->tx_dma;
- volatile struct dbdma_regs *rd = bp->rx_dma;
- volatile struct dbdma_cmd *cp;
- unsigned long flags;
- unsigned short config, oldConfig;
- int i;
- XXDEBUG(("bmac: tx_timeout calledn"));
- save_flags(flags); cli();
- 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=%xn", */
- /* ld_le32(&td->status), ld_le16(&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 - resettingn");
- bmac_enable_and_reset_chip(dev);
- /* restart rx dma */
- cp = bus_to_virt(ld_le32(&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=%dn",
- bp->tx_empty, bp->tx_fill, bp->tx_fullup));
- i = bp->tx_empty;
- ++bp->stats.tx_errors;
- if (i != bp->tx_fill) {
- dev_kfree_skb(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 %dn", i));
- }
- /* turn it back on */
- oldConfig = bmread(dev, RXCFG);
- bmwrite(dev, RXCFG, oldConfig | RxMACEnable );
- oldConfig = bmread(dev, TXCFG);
- bmwrite(dev, TXCFG, oldConfig | TxMACEnable );
- restore_flags(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%xn",
- ld_le32(ip+0),
- ld_le32(ip+1),
- ld_le32(ip+2),
- ld_le32(ip+3));
- }
- }
- #endif
- 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 & registersn");
- for (i = 0; i<N_REG_ENTRIES; i++) {
- len += sprintf(buffer + len, "%s: %#08xn",
- 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;
- }
- MODULE_AUTHOR("Randy Gobbel/Paul Mackerras");
- MODULE_DESCRIPTION("PowerMac BMAC ethernet driver.");
- MODULE_LICENSE("GPL");
- EXPORT_NO_SYMBOLS;
- static void __exit bmac_cleanup (void)
- {
- struct bmac_data *bp;
- struct net_device *dev;
- if (bmac_emergency_rxbuf != NULL) {
- kfree(bmac_emergency_rxbuf);
- bmac_emergency_rxbuf = NULL;
- }
- if (bmac_devs == 0)
- return;
- #ifdef CONFIG_PMAC_PBOOK
- pmu_unregister_sleep_notifier(&bmac_sleep_notifier);
- #endif
- proc_net_remove("bmac");
- do {
- dev = bmac_devs;
- bp = (struct bmac_data *) dev->priv;
- bmac_devs = bp->next_bmac;
- unregister_netdev(dev);
- release_OF_resource(bp->node, 0);
- release_OF_resource(bp->node, 1);
- release_OF_resource(bp->node, 2);
- free_irq(dev->irq, dev);
- free_irq(bp->tx_dma_intr, dev);
- free_irq(bp->rx_dma_intr, dev);
- kfree(dev);
- } while (bmac_devs != NULL);
- }
- module_init(bmac_probe);
- module_exit(bmac_cleanup);