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path: root/drivers/net/bmac.c
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-rw-r--r--drivers/net/bmac.c1708
1 files changed, 1708 insertions, 0 deletions
diff --git a/drivers/net/bmac.c b/drivers/net/bmac.c
new file mode 100644
index 00000000000..3d2be7c28e0
--- /dev/null
+++ b/drivers/net/bmac.c
@@ -0,0 +1,1708 @@
+/*
+ * 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 <linux/spinlock.h>
+#include <linux/crc32.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 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];
+ 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 unsigned char bitrev(unsigned char b);
+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 irqreturn_t bmac_misc_intr(int irq, void *dev_id, struct pt_regs *regs);
+static irqreturn_t bmac_txdma_intr(int irq, void *dev_id, struct pt_regs *regs);
+static irqreturn_t 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_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");
+ return;
+}
+
+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
+volatile 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);
+
+ 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 = 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("\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_PM
+static int bmac_suspend(struct macio_dev *mdev, u32 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);
+}
+
+/* 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 __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;
+
+ bp->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 pt_regs *regs)
+{
+ 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;
+ 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;
+ }
+
+ 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 pt_regs *regs)
+{
+ 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]) {
+ ++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;
+ }
+
+ spin_unlock_irqrestore(&bp->lock, flags);
+
+ if (txintcount < 10) {
+ XXDEBUG(("bmac_txdma_intr done->bmac_start\n"));
+ }
+
+ bmac_start(dev);
+ return IRQ_HANDLED;
+}
+
+static struct net_device_stats *bmac_stats(struct net_device *dev)
+{
+ struct bmac_data *p = netdev_priv(dev);
+
+ 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, %#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 dev_mc_list *dmi;
+ struct bmac_data *bp = netdev_priv(dev);
+ int num_addrs = dev->mc_count;
+ 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) || (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=%#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 {
+ 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=%#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 dev_mc_list *dmi = dev->mc_list;
+ char *addrs;
+ int i;
+ unsigned short rx_cfg;
+ u32 crc;
+
+ 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 = ether_crc_le(6, addrs);
+ 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 pt_regs *regs)
+{
+ struct net_device *dev = (struct net_device *) dev_id;
+ struct bmac_data *bp = netdev_priv(dev);
+ 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, 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++;
+ 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] = 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 = 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 int __devinit bmac_probe(struct macio_dev *mdev, const struct of_match *match)
+{
+ int j, rev, ret;
+ struct bmac_data *bp;
+ unsigned char *addr;
+ 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;
+ }
+ addr = get_property(macio_get_of_node(mdev), "mac-address", NULL);
+ if (addr == NULL) {
+ addr = get_property(macio_get_of_node(mdev), "local-mac-address", NULL);
+ if (addr == NULL) {
+ printk(KERN_ERR "BMAC: Can't get mac-address\n");
+ return -ENODEV;
+ }
+ }
+
+ 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_MODULE_OWNER(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? bitrev(addr[j]): addr[j];
+
+ /* 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 = 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", dev->name, (is_bmac_plus? "+": ""));
+ for (j = 0; j < 6; ++j)
+ printk("%c%.2x", (j? ':': ' '), dev->dev_addr[j]);
+ 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);
+ dev->flags |= IFF_RUNNING;
+ 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;
+ 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 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 0;
+}
+
+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;
+ ++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 %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_match bmac_match[] =
+{
+ {
+ .name = "bmac",
+ .type = OF_ANY_MATCH,
+ .compatible = OF_ANY_MATCH,
+ .data = (void *)0,
+ },
+ {
+ .name = OF_ANY_MATCH,
+ .type = "network",
+ .compatible = "bmac+",
+ .data = (void *)1,
+ },
+ {},
+};
+
+static struct macio_driver bmac_driver =
+{
+ .name = "bmac",
+ .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);
+
+ if (bmac_emergency_rxbuf != NULL) {
+ 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);
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-24 06:14:34 +0000