diff options
Diffstat (limited to 'drivers/net/bmac.c')
| -rw-r--r-- | drivers/net/bmac.c | 1685 |
1 files changed, 0 insertions, 1685 deletions
diff --git a/drivers/net/bmac.c b/drivers/net/bmac.c deleted file mode 100644 index 45e45e8..0000000 --- a/drivers/net/bmac.c +++ /dev/null @@ -1,1685 +0,0 @@ -/* - * 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/interrupt.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 <linux/spinlock.h> -#include <linux/crc32.h> -#include <linux/bitrev.h> -#include <linux/ethtool.h> -#include <linux/slab.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> -#include <asm/macio.h> -#include <asm/irq.h> - -#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 __iomem *tx_dma; - int tx_dma_intr; - volatile struct dbdma_regs __iomem *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 macio_dev *mdev; - 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 timer_list tx_timeout; - int timeout_active; - int sleeping; - int opened; - unsigned short hash_use_count[64]; - unsigned short hash_table_mask[4]; - spinlock_t lock; -}; - -#if 0 /* Move that to ethtool */ - -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} -}; - -#endif - -static unsigned char *bmac_emergency_rxbuf; - -/* - * 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 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 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 irqreturn_t bmac_misc_intr(int irq, void *dev_id); -static irqreturn_t bmac_txdma_intr(int irq, void *dev_id); -static irqreturn_t bmac_rxdma_intr(int irq, void *dev_id); -static void bmac_set_timeout(struct net_device *dev); -static void bmac_tx_timeout(unsigned long data); -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 __u32 __iomem *a, unsigned long x) -{ - __asm__ volatile( "stwbrx %0,0,%1" : : "r" (x), "r" (a) : "memory"); -} - -static inline unsigned long -dbdma_ld32(volatile __u32 __iomem *a) -{ - __u32 swap; - __asm__ volatile ("lwbrx %0,0,%1" : "=r" (swap) : "r" (a)); - return swap; -} - -static void -dbdma_continue(volatile struct dbdma_regs __iomem *dmap) -{ - dbdma_st32(&dmap->control, - DBDMA_SET(RUN|WAKE) | DBDMA_CLEAR(PAUSE|DEAD)); - eieio(); -} - -static void -dbdma_reset(volatile struct dbdma_regs __iomem *dmap) -{ - dbdma_st32(&dmap->control, - DBDMA_CLEAR(ACTIVE|DEAD|WAKE|FLUSH|PAUSE|RUN)); - eieio(); - while (dbdma_ld32(&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 __iomem *)dev->base_addr + reg_offset, data); -} - - -static inline -unsigned short bmread(struct net_device *dev, unsigned long reg_offset ) -{ - return in_le16((void __iomem *)dev->base_addr + reg_offset); -} - -static void -bmac_enable_and_reset_chip(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; - - if (rd) - dbdma_reset(rd); - if (td) - dbdma_reset(td); - - pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 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 = netdev_priv(dev); - volatile unsigned short regValue; - unsigned short *pWord16; - int i; - - /* XXDEBUG(("bmac: enter init_registers\n")); */ - - 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); -} - -#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 = netdev_priv(dev); - volatile struct dbdma_regs __iomem *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 = netdev_priv(dev); - - printk(KERN_DEBUG "phy registers:"); - for (addr = 0; addr < 32; ++addr) { - if ((addr & 7) == 0) - printk(KERN_DEBUG); - printk(KERN_CONT " %.4x", bmac_mif_read(dev, addr)); - } - printk(KERN_CONT "\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_PM -static int bmac_suspend(struct macio_dev *mdev, pm_message_t state) -{ - struct net_device* dev = macio_get_drvdata(mdev); - struct bmac_data *bp = netdev_priv(dev); - unsigned long flags; - unsigned short config; - int i; - - netif_device_detach(dev); - /* prolly should wait for dma to finish & turn off the chip */ - spin_lock_irqsave(&bp->lock, flags); - 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; - spin_unlock_irqrestore(&bp->lock, flags); - if (bp->opened) { - volatile struct dbdma_regs __iomem *rd = bp->rx_dma; - volatile struct dbdma_regs __iomem *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, macio_get_of_node(bp->mdev), 0, 0); - return 0; -} - -static int bmac_resume(struct macio_dev *mdev) -{ - struct net_device* dev = macio_get_drvdata(mdev); - struct bmac_data *bp = netdev_priv(dev); - - /* 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); - - 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; - unsigned long flags; - 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; - bp->tx_timeout.function = bmac_tx_timeout; - bp->tx_timeout.data = (unsigned long) dev; - 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 bmac_data *bp) -{ - 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 = 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 = 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 = 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; - 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 = 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; - } - - 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 = ld_le16(&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_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; - } - - 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) -{ - 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, %#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; - int i; - 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]; - - rx_cfg = bmread(dev, RXCFG); - rx_cfg &= ~RxPromiscEnable; - bmwrite(dev, RXCFG, rx_cfg); - - for(i = 0; i < 4; i++) hash_table[i] = 0; - - 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 < 6; 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(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); - } - 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_multicast_list = bmac_set_multicast, - .ndo_set_mac_address = bmac_set_address, - .ndo_change_mtu = eth_change_mtu, - .ndo_validate_addr = eth_validate_addr, -}; - -static int __devinit 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) { - printk(KERN_ERR "BMAC: alloc_etherdev failed, out of memory\n"); - 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); - - init_timer(&bp->tx_timeout); - - 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 */ - 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 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 int -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(unsigned long data) -{ - struct net_device *dev = (struct net_device *) data; - struct bmac_data *bp = netdev_priv(dev); - 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", */ -/* 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 - resetting\n"); - 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=%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(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", - ld_le32(ip+0), - ld_le32(ip+1), - ld_le32(ip+2), - ld_le32(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 __devexit 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 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) { - printk(KERN_ERR "BMAC: can't allocate emergency RX buffer\n"); - 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); |