*sonic/natsemi/ns83829: Move the National Semi-conductor drivers

Move the National Semi-conductor drivers into drivers/net/ethernet/natsemi/
and make the necessary Kconfig and Makefile changes.  Also moved the 8390
(National Semi-conductor) devices as a sub-menu of National Semi-conductor
devices.

- moved the ibmlana driver as well into this directory since it is a
  "SONIC" driver

CC: Alfred Arnold <alfred.arnold@lancom.de>
CC: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
CC: Harald Welte <laforge@gnumonks.org>
CC: Tim Hockin <thockin@hockin.org>
CC: <linux-ns83820@kvack.org>
CC: Kevin Chea <kchea@yahoo.com>
CC: Marc Gauthier <marc@linux-xtensa.org>
CC: Chris Zankel <chris@zankel.net>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: Marc Gauthier <marc@tensilica.com>

1 files changed, 742 insertions, 0 deletions

diff --git a/drivers/net/ethernet/natsemi/sonic.c b/drivers/net/ethernet/natsemi/sonic.c
new file mode 100644
index 000000000000..26e25d7f5829
--- /dev/null
+++ b/drivers/net/ethernet/natsemi/sonic.c
@@ -0,0 +1,742 @@
+/*
+ * sonic.c
+ *
+ * (C) 2005 Finn Thain
+ *
+ * Converted to DMA API, added zero-copy buffer handling, and
+ * (from the mac68k project) introduced dhd's support for 16-bit cards.
+ *
+ * (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.franken.de)
+ *
+ * This driver is based on work from Andreas Busse, but most of
+ * the code is rewritten.
+ *
+ * (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de)
+ *
+ *    Core code included by system sonic drivers
+ *
+ * And... partially rewritten again by David Huggins-Daines in order
+ * to cope with screwed up Macintosh NICs that may or may not use
+ * 16-bit DMA.
+ *
+ * (C) 1999 David Huggins-Daines <dhd@debian.org>
+ *
+ */
+
+/*
+ * Sources: Olivetti M700-10 Risc Personal Computer hardware handbook,
+ * National Semiconductors data sheet for the DP83932B Sonic Ethernet
+ * controller, and the files "8390.c" and "skeleton.c" in this directory.
+ *
+ * Additional sources: Nat Semi data sheet for the DP83932C and Nat Semi
+ * Application Note AN-746, the files "lance.c" and "ibmlana.c". See also
+ * the NetBSD file "sys/arch/mac68k/dev/if_sn.c".
+ */
+
+
+
+/*
+ * Open/initialize the SONIC controller.
+ *
+ * This routine should set everything up anew at each open, even
+ *  registers that "should" only need to be set once at boot, so that
+ *  there is non-reboot way to recover if something goes wrong.
+ */
+static int sonic_open(struct net_device *dev)
+{
+        struct sonic_local *lp = netdev_priv(dev);
+        int i;
+
+        if (sonic_debug > 2)
+                printk("sonic_open: initializing sonic driver.\n");
+
+        for (i = 0; i < SONIC_NUM_RRS; i++) {
+                struct sk_buff *skb = dev_alloc_skb(SONIC_RBSIZE + 2);
+                if (skb == NULL) {
+                        while(i > 0) { /* free any that were allocated successfully */
+                                i--;
+                                dev_kfree_skb(lp->rx_skb[i]);
+                                lp->rx_skb[i] = NULL;
+                        }
+                        printk(KERN_ERR "%s: couldn't allocate receive buffers\n",
+                               dev->name);
+                        return -ENOMEM;
+                }
+                /* align IP header unless DMA requires otherwise */
+                if (SONIC_BUS_SCALE(lp->dma_bitmode) == 2)
+                        skb_reserve(skb, 2);
+                lp->rx_skb[i] = skb;
+        }
+
+        for (i = 0; i < SONIC_NUM_RRS; i++) {
+                dma_addr_t laddr = dma_map_single(lp->device, skb_put(lp->rx_skb[i], SONIC_RBSIZE),
+                                                  SONIC_RBSIZE, DMA_FROM_DEVICE);
+                if (!laddr) {
+                        while(i > 0) { /* free any that were mapped successfully */
+                                i--;
+                                dma_unmap_single(lp->device, lp->rx_laddr[i], SONIC_RBSIZE, DMA_FROM_DEVICE);
+                                lp->rx_laddr[i] = (dma_addr_t)0;
+                        }
+                        for (i = 0; i < SONIC_NUM_RRS; i++) {
+                                dev_kfree_skb(lp->rx_skb[i]);
+                                lp->rx_skb[i] = NULL;
+                        }
+                        printk(KERN_ERR "%s: couldn't map rx DMA buffers\n",
+                               dev->name);
+                        return -ENOMEM;
+                }
+                lp->rx_laddr[i] = laddr;
+        }
+
+        /*
+         * Initialize the SONIC
+         */
+        sonic_init(dev);
+
+        netif_start_queue(dev);
+
+        if (sonic_debug > 2)
+                printk("sonic_open: Initialization done.\n");
+
+        return 0;
+}
+
+
+/*
+ * Close the SONIC device
+ */
+static int sonic_close(struct net_device *dev)
+{
+        struct sonic_local *lp = netdev_priv(dev);
+        int i;
+
+        if (sonic_debug > 2)
+                printk("sonic_close\n");
+
+        netif_stop_queue(dev);
+
+        /*
+         * stop the SONIC, disable interrupts
+         */
+        SONIC_WRITE(SONIC_IMR, 0);
+        SONIC_WRITE(SONIC_ISR, 0x7fff);
+        SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
+
+        /* unmap and free skbs that haven't been transmitted */
+        for (i = 0; i < SONIC_NUM_TDS; i++) {
+                if(lp->tx_laddr[i]) {
+                        dma_unmap_single(lp->device, lp->tx_laddr[i], lp->tx_len[i], DMA_TO_DEVICE);
+                        lp->tx_laddr[i] = (dma_addr_t)0;
+                }
+                if(lp->tx_skb[i]) {
+                        dev_kfree_skb(lp->tx_skb[i]);
+                        lp->tx_skb[i] = NULL;
+                }
+        }
+
+        /* unmap and free the receive buffers */
+        for (i = 0; i < SONIC_NUM_RRS; i++) {
+                if(lp->rx_laddr[i]) {
+                        dma_unmap_single(lp->device, lp->rx_laddr[i], SONIC_RBSIZE, DMA_FROM_DEVICE);
+                        lp->rx_laddr[i] = (dma_addr_t)0;
+                }
+                if(lp->rx_skb[i]) {
+                        dev_kfree_skb(lp->rx_skb[i]);
+                        lp->rx_skb[i] = NULL;
+                }
+        }
+
+        return 0;
+}
+
+static void sonic_tx_timeout(struct net_device *dev)
+{
+        struct sonic_local *lp = netdev_priv(dev);
+        int i;
+        /*
+         * put the Sonic into software-reset mode and
+         * disable all interrupts before releasing DMA buffers
+         */
+        SONIC_WRITE(SONIC_IMR, 0);
+        SONIC_WRITE(SONIC_ISR, 0x7fff);
+        SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
+        /* We could resend the original skbs. Easier to re-initialise. */
+        for (i = 0; i < SONIC_NUM_TDS; i++) {
+                if(lp->tx_laddr[i]) {
+                        dma_unmap_single(lp->device, lp->tx_laddr[i], lp->tx_len[i], DMA_TO_DEVICE);
+                        lp->tx_laddr[i] = (dma_addr_t)0;
+                }
+                if(lp->tx_skb[i]) {
+                        dev_kfree_skb(lp->tx_skb[i]);
+                        lp->tx_skb[i] = NULL;
+                }
+        }
+        /* Try to restart the adaptor. */
+        sonic_init(dev);
+        lp->stats.tx_errors++;
+        dev->trans_start = jiffies; /* prevent tx timeout */
+        netif_wake_queue(dev);
+}
+
+/*
+ * transmit packet
+ *
+ * Appends new TD during transmission thus avoiding any TX interrupts
+ * until we run out of TDs.
+ * This routine interacts closely with the ISR in that it may,
+ *   set tx_skb[i]
+ *   reset the status flags of the new TD
+ *   set and reset EOL flags
+ *   stop the tx queue
+ * The ISR interacts with this routine in various ways. It may,
+ *   reset tx_skb[i]
+ *   test the EOL and status flags of the TDs
+ *   wake the tx queue
+ * Concurrently with all of this, the SONIC is potentially writing to
+ * the status flags of the TDs.
+ * Until some mutual exclusion is added, this code will not work with SMP. However,
+ * MIPS Jazz machines and m68k Macs were all uni-processor machines.
+ */
+
+static int sonic_send_packet(struct sk_buff *skb, struct net_device *dev)
+{
+        struct sonic_local *lp = netdev_priv(dev);
+        dma_addr_t laddr;
+        int length;
+        int entry = lp->next_tx;
+
+        if (sonic_debug > 2)
+                printk("sonic_send_packet: skb=%p, dev=%p\n", skb, dev);
+
+        length = skb->len;
+        if (length < ETH_ZLEN) {
+                if (skb_padto(skb, ETH_ZLEN))
+                        return NETDEV_TX_OK;
+                length = ETH_ZLEN;
+        }
+
+        /*
+         * Map the packet data into the logical DMA address space
+         */
+
+        laddr = dma_map_single(lp->device, skb->data, length, DMA_TO_DEVICE);
+        if (!laddr) {
+                printk(KERN_ERR "%s: failed to map tx DMA buffer.\n", dev->name);
+                dev_kfree_skb(skb);
+                return NETDEV_TX_BUSY;
+        }
+
+        sonic_tda_put(dev, entry, SONIC_TD_STATUS, 0);       /* clear status */
+        sonic_tda_put(dev, entry, SONIC_TD_FRAG_COUNT, 1);   /* single fragment */
+        sonic_tda_put(dev, entry, SONIC_TD_PKTSIZE, length); /* length of packet */
+        sonic_tda_put(dev, entry, SONIC_TD_FRAG_PTR_L, laddr & 0xffff);
+        sonic_tda_put(dev, entry, SONIC_TD_FRAG_PTR_H, laddr >> 16);
+        sonic_tda_put(dev, entry, SONIC_TD_FRAG_SIZE, length);
+        sonic_tda_put(dev, entry, SONIC_TD_LINK,
+                sonic_tda_get(dev, entry, SONIC_TD_LINK) | SONIC_EOL);
+
+        /*
+         * Must set tx_skb[entry] only after clearing status, and
+         * before clearing EOL and before stopping queue
+         */
+        wmb();
+        lp->tx_len[entry] = length;
+        lp->tx_laddr[entry] = laddr;
+        lp->tx_skb[entry] = skb;
+
+        wmb();
+        sonic_tda_put(dev, lp->eol_tx, SONIC_TD_LINK,
+                                  sonic_tda_get(dev, lp->eol_tx, SONIC_TD_LINK) & ~SONIC_EOL);
+        lp->eol_tx = entry;
+
+        lp->next_tx = (entry + 1) & SONIC_TDS_MASK;
+        if (lp->tx_skb[lp->next_tx] != NULL) {
+                /* The ring is full, the ISR has yet to process the next TD. */
+                if (sonic_debug > 3)
+                        printk("%s: stopping queue\n", dev->name);
+                netif_stop_queue(dev);
+                /* after this packet, wait for ISR to free up some TDAs */
+        } else netif_start_queue(dev);
+
+        if (sonic_debug > 2)
+                printk("sonic_send_packet: issuing Tx command\n");
+
+        SONIC_WRITE(SONIC_CMD, SONIC_CR_TXP);
+
+        return NETDEV_TX_OK;
+}
+
+/*
+ * The typical workload of the driver:
+ * Handle the network interface interrupts.
+ */
+static irqreturn_t sonic_interrupt(int irq, void *dev_id)
+{
+        struct net_device *dev = dev_id;
+        struct sonic_local *lp = netdev_priv(dev);
+        int status;
+
+        if (!(status = SONIC_READ(SONIC_ISR) & SONIC_IMR_DEFAULT))
+                return IRQ_NONE;
+
+        do {
+                if (status & SONIC_INT_PKTRX) {
+                        if (sonic_debug > 2)
+                                printk("%s: packet rx\n", dev->name);
+                        sonic_rx(dev);  /* got packet(s) */
+                        SONIC_WRITE(SONIC_ISR, SONIC_INT_PKTRX); /* clear the interrupt */
+                }
+
+                if (status & SONIC_INT_TXDN) {
+                        int entry = lp->cur_tx;
+                        int td_status;
+                        int freed_some = 0;
+
+                        /* At this point, cur_tx is the index of a TD that is one of:
+                         *   unallocated/freed                          (status set   & tx_skb[entry] clear)
+                         *   allocated and sent                         (status set   & tx_skb[entry] set  )
+                         *   allocated and not yet sent                 (status clear & tx_skb[entry] set  )
+                         *   still being allocated by sonic_send_packet (status clear & tx_skb[entry] clear)
+                         */
+
+                        if (sonic_debug > 2)
+                                printk("%s: tx done\n", dev->name);
+
+                        while (lp->tx_skb[entry] != NULL) {
+                                if ((td_status = sonic_tda_get(dev, entry, SONIC_TD_STATUS)) == 0)
+                                        break;
+
+                                if (td_status & 0x0001) {
+                                        lp->stats.tx_packets++;
+                                        lp->stats.tx_bytes += sonic_tda_get(dev, entry, SONIC_TD_PKTSIZE);
+                                } else {
+                                        lp->stats.tx_errors++;
+                                        if (td_status & 0x0642)
+                                                lp->stats.tx_aborted_errors++;
+                                        if (td_status & 0x0180)
+                                                lp->stats.tx_carrier_errors++;
+                                        if (td_status & 0x0020)
+                                                lp->stats.tx_window_errors++;
+                                        if (td_status & 0x0004)
+                                                lp->stats.tx_fifo_errors++;
+                                }
+
+                                /* We must free the original skb */
+                                dev_kfree_skb_irq(lp->tx_skb[entry]);
+                                lp->tx_skb[entry] = NULL;
+                                /* and unmap DMA buffer */
+                                dma_unmap_single(lp->device, lp->tx_laddr[entry], lp->tx_len[entry], DMA_TO_DEVICE);
+                                lp->tx_laddr[entry] = (dma_addr_t)0;
+                                freed_some = 1;
+
+                                if (sonic_tda_get(dev, entry, SONIC_TD_LINK) & SONIC_EOL) {
+                                        entry = (entry + 1) & SONIC_TDS_MASK;
+                                        break;
+                                }
+                                entry = (entry + 1) & SONIC_TDS_MASK;
+                        }
+
+                        if (freed_some || lp->tx_skb[entry] == NULL)
+                                netif_wake_queue(dev);  /* The ring is no longer full */
+                        lp->cur_tx = entry;
+                        SONIC_WRITE(SONIC_ISR, SONIC_INT_TXDN); /* clear the interrupt */
+                }
+
+                /*
+                 * check error conditions
+                 */
+                if (status & SONIC_INT_RFO) {
+                        if (sonic_debug > 1)
+                                printk("%s: rx fifo overrun\n", dev->name);
+                        lp->stats.rx_fifo_errors++;
+                        SONIC_WRITE(SONIC_ISR, SONIC_INT_RFO); /* clear the interrupt */
+                }
+                if (status & SONIC_INT_RDE) {
+                        if (sonic_debug > 1)
+                                printk("%s: rx descriptors exhausted\n", dev->name);
+                        lp->stats.rx_dropped++;
+                        SONIC_WRITE(SONIC_ISR, SONIC_INT_RDE); /* clear the interrupt */
+                }
+                if (status & SONIC_INT_RBAE) {
+                        if (sonic_debug > 1)
+                                printk("%s: rx buffer area exceeded\n", dev->name);
+                        lp->stats.rx_dropped++;
+                        SONIC_WRITE(SONIC_ISR, SONIC_INT_RBAE); /* clear the interrupt */
+                }
+
+                /* counter overruns; all counters are 16bit wide */
+                if (status & SONIC_INT_FAE) {
+                        lp->stats.rx_frame_errors += 65536;
+                        SONIC_WRITE(SONIC_ISR, SONIC_INT_FAE); /* clear the interrupt */
+                }
+                if (status & SONIC_INT_CRC) {
+                        lp->stats.rx_crc_errors += 65536;
+                        SONIC_WRITE(SONIC_ISR, SONIC_INT_CRC); /* clear the interrupt */
+                }
+                if (status & SONIC_INT_MP) {
+                        lp->stats.rx_missed_errors += 65536;
+                        SONIC_WRITE(SONIC_ISR, SONIC_INT_MP); /* clear the interrupt */
+                }
+
+                /* transmit error */
+                if (status & SONIC_INT_TXER) {
+                        if ((SONIC_READ(SONIC_TCR) & SONIC_TCR_FU) && (sonic_debug > 2))
+                                printk(KERN_ERR "%s: tx fifo underrun\n", dev->name);
+                        SONIC_WRITE(SONIC_ISR, SONIC_INT_TXER); /* clear the interrupt */
+                }
+
+                /* bus retry */
+                if (status & SONIC_INT_BR) {
+                        printk(KERN_ERR "%s: Bus retry occurred! Device interrupt disabled.\n",
+                                dev->name);
+                        /* ... to help debug DMA problems causing endless interrupts. */
+                        /* Bounce the eth interface to turn on the interrupt again. */
+                        SONIC_WRITE(SONIC_IMR, 0);
+                        SONIC_WRITE(SONIC_ISR, SONIC_INT_BR); /* clear the interrupt */
+                }
+
+                /* load CAM done */
+                if (status & SONIC_INT_LCD)
+                        SONIC_WRITE(SONIC_ISR, SONIC_INT_LCD); /* clear the interrupt */
+        } while((status = SONIC_READ(SONIC_ISR) & SONIC_IMR_DEFAULT));
+        return IRQ_HANDLED;
+}
+
+/*
+ * We have a good packet(s), pass it/them up the network stack.
+ */
+static void sonic_rx(struct net_device *dev)
+{
+        struct sonic_local *lp = netdev_priv(dev);
+        int status;
+        int entry = lp->cur_rx;
+
+        while (sonic_rda_get(dev, entry, SONIC_RD_IN_USE) == 0) {
+                struct sk_buff *used_skb;
+                struct sk_buff *new_skb;
+                dma_addr_t new_laddr;
+                u16 bufadr_l;
+                u16 bufadr_h;
+                int pkt_len;
+
+                status = sonic_rda_get(dev, entry, SONIC_RD_STATUS);
+                if (status & SONIC_RCR_PRX) {
+                        /* Malloc up new buffer. */
+                        new_skb = dev_alloc_skb(SONIC_RBSIZE + 2);
+                        if (new_skb == NULL) {
+                                printk(KERN_ERR "%s: Memory squeeze, dropping packet.\n", dev->name);
+                                lp->stats.rx_dropped++;
+                                break;
+                        }
+                        /* provide 16 byte IP header alignment unless DMA requires otherwise */
+                        if(SONIC_BUS_SCALE(lp->dma_bitmode) == 2)
+                                skb_reserve(new_skb, 2);
+
+                        new_laddr = dma_map_single(lp->device, skb_put(new_skb, SONIC_RBSIZE),
+                                               SONIC_RBSIZE, DMA_FROM_DEVICE);
+                        if (!new_laddr) {
+                                dev_kfree_skb(new_skb);
+                                printk(KERN_ERR "%s: Failed to map rx buffer, dropping packet.\n", dev->name);
+                                lp->stats.rx_dropped++;
+                                break;
+                        }
+
+                        /* now we have a new skb to replace it, pass the used one up the stack */
+                        dma_unmap_single(lp->device, lp->rx_laddr[entry], SONIC_RBSIZE, DMA_FROM_DEVICE);
+                        used_skb = lp->rx_skb[entry];
+                        pkt_len = sonic_rda_get(dev, entry, SONIC_RD_PKTLEN);
+                        skb_trim(used_skb, pkt_len);
+                        used_skb->protocol = eth_type_trans(used_skb, dev);
+                        netif_rx(used_skb);
+                        lp->stats.rx_packets++;
+                        lp->stats.rx_bytes += pkt_len;
+
+                        /* and insert the new skb */
+                        lp->rx_laddr[entry] = new_laddr;
+                        lp->rx_skb[entry] = new_skb;
+
+                        bufadr_l = (unsigned long)new_laddr & 0xffff;
+                        bufadr_h = (unsigned long)new_laddr >> 16;
+                        sonic_rra_put(dev, entry, SONIC_RR_BUFADR_L, bufadr_l);
+                        sonic_rra_put(dev, entry, SONIC_RR_BUFADR_H, bufadr_h);
+                } else {
+                        /* This should only happen, if we enable accepting broken packets. */
+                        lp->stats.rx_errors++;
+                        if (status & SONIC_RCR_FAER)
+                                lp->stats.rx_frame_errors++;
+                        if (status & SONIC_RCR_CRCR)
+                                lp->stats.rx_crc_errors++;
+                }
+                if (status & SONIC_RCR_LPKT) {
+                        /*
+                         * this was the last packet out of the current receive buffer
+                         * give the buffer back to the SONIC
+                         */
+                        lp->cur_rwp += SIZEOF_SONIC_RR * SONIC_BUS_SCALE(lp->dma_bitmode);
+                        if (lp->cur_rwp >= lp->rra_end) lp->cur_rwp = lp->rra_laddr & 0xffff;
+                        SONIC_WRITE(SONIC_RWP, lp->cur_rwp);
+                        if (SONIC_READ(SONIC_ISR) & SONIC_INT_RBE) {
+                                if (sonic_debug > 2)
+                                        printk("%s: rx buffer exhausted\n", dev->name);
+                                SONIC_WRITE(SONIC_ISR, SONIC_INT_RBE); /* clear the flag */
+                        }
+                } else
+                        printk(KERN_ERR "%s: rx desc without RCR_LPKT. Shouldn't happen !?\n",
+                             dev->name);
+                /*
+                 * give back the descriptor
+                 */
+                sonic_rda_put(dev, entry, SONIC_RD_LINK,
+                        sonic_rda_get(dev, entry, SONIC_RD_LINK) | SONIC_EOL);
+                sonic_rda_put(dev, entry, SONIC_RD_IN_USE, 1);
+                sonic_rda_put(dev, lp->eol_rx, SONIC_RD_LINK,
+                        sonic_rda_get(dev, lp->eol_rx, SONIC_RD_LINK) & ~SONIC_EOL);
+                lp->eol_rx = entry;
+                lp->cur_rx = entry = (entry + 1) & SONIC_RDS_MASK;
+        }
+        /*
+         * If any worth-while packets have been received, netif_rx()
+         * has done a mark_bh(NET_BH) for us and will work on them
+         * when we get to the bottom-half routine.
+         */
+}
+
+
+/*
+ * Get the current statistics.
+ * This may be called with the device open or closed.
+ */
+static struct net_device_stats *sonic_get_stats(struct net_device *dev)
+{
+        struct sonic_local *lp = netdev_priv(dev);
+
+        /* read the tally counter from the SONIC and reset them */
+        lp->stats.rx_crc_errors += SONIC_READ(SONIC_CRCT);
+        SONIC_WRITE(SONIC_CRCT, 0xffff);
+        lp->stats.rx_frame_errors += SONIC_READ(SONIC_FAET);
+        SONIC_WRITE(SONIC_FAET, 0xffff);
+        lp->stats.rx_missed_errors += SONIC_READ(SONIC_MPT);
+        SONIC_WRITE(SONIC_MPT, 0xffff);
+
+        return &lp->stats;
+}
+
+
+/*
+ * Set or clear the multicast filter for this adaptor.
+ */
+static void sonic_multicast_list(struct net_device *dev)
+{
+        struct sonic_local *lp = netdev_priv(dev);
+        unsigned int rcr;
+        struct netdev_hw_addr *ha;
+        unsigned char *addr;
+        int i;
+
+        rcr = SONIC_READ(SONIC_RCR) & ~(SONIC_RCR_PRO | SONIC_RCR_AMC);
+        rcr |= SONIC_RCR_BRD;   /* accept broadcast packets */
+
+        if (dev->flags & IFF_PROMISC) { /* set promiscuous mode */
+                rcr |= SONIC_RCR_PRO;
+        } else {
+                if ((dev->flags & IFF_ALLMULTI) ||
+                    (netdev_mc_count(dev) > 15)) {
+                        rcr |= SONIC_RCR_AMC;
+                } else {
+                        if (sonic_debug > 2)
+                                printk("sonic_multicast_list: mc_count %d\n",
+                                       netdev_mc_count(dev));
+                        sonic_set_cam_enable(dev, 1);  /* always enable our own address */
+                        i = 1;
+                        netdev_for_each_mc_addr(ha, dev) {
+                                addr = ha->addr;
+                                sonic_cda_put(dev, i, SONIC_CD_CAP0, addr[1] << 8 | addr[0]);
+                                sonic_cda_put(dev, i, SONIC_CD_CAP1, addr[3] << 8 | addr[2]);
+                                sonic_cda_put(dev, i, SONIC_CD_CAP2, addr[5] << 8 | addr[4]);
+                                sonic_set_cam_enable(dev, sonic_get_cam_enable(dev) | (1 << i));
+                                i++;
+                        }
+                        SONIC_WRITE(SONIC_CDC, 16);
+                        /* issue Load CAM command */
+                        SONIC_WRITE(SONIC_CDP, lp->cda_laddr & 0xffff);
+                        SONIC_WRITE(SONIC_CMD, SONIC_CR_LCAM);
+                }
+        }
+
+        if (sonic_debug > 2)
+                printk("sonic_multicast_list: setting RCR=%x\n", rcr);
+
+        SONIC_WRITE(SONIC_RCR, rcr);
+}
+
+
+/*
+ * Initialize the SONIC ethernet controller.
+ */
+static int sonic_init(struct net_device *dev)
+{
+        unsigned int cmd;
+        struct sonic_local *lp = netdev_priv(dev);
+        int i;
+
+        /*
+         * put the Sonic into software-reset mode and
+         * disable all interrupts
+         */
+        SONIC_WRITE(SONIC_IMR, 0);
+        SONIC_WRITE(SONIC_ISR, 0x7fff);
+        SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
+
+        /*
+         * clear software reset flag, disable receiver, clear and
+         * enable interrupts, then completely initialize the SONIC
+         */
+        SONIC_WRITE(SONIC_CMD, 0);
+        SONIC_WRITE(SONIC_CMD, SONIC_CR_RXDIS);
+
+        /*
+         * initialize the receive resource area
+         */
+        if (sonic_debug > 2)
+                printk("sonic_init: initialize receive resource area\n");
+
+        for (i = 0; i < SONIC_NUM_RRS; i++) {
+                u16 bufadr_l = (unsigned long)lp->rx_laddr[i] & 0xffff;
+                u16 bufadr_h = (unsigned long)lp->rx_laddr[i] >> 16;
+                sonic_rra_put(dev, i, SONIC_RR_BUFADR_L, bufadr_l);
+                sonic_rra_put(dev, i, SONIC_RR_BUFADR_H, bufadr_h);
+                sonic_rra_put(dev, i, SONIC_RR_BUFSIZE_L, SONIC_RBSIZE >> 1);
+                sonic_rra_put(dev, i, SONIC_RR_BUFSIZE_H, 0);
+        }
+
+        /* initialize all RRA registers */
+        lp->rra_end = (lp->rra_laddr + SONIC_NUM_RRS * SIZEOF_SONIC_RR *
+                                        SONIC_BUS_SCALE(lp->dma_bitmode)) & 0xffff;
+        lp->cur_rwp = (lp->rra_laddr + (SONIC_NUM_RRS - 1) * SIZEOF_SONIC_RR *
+                                        SONIC_BUS_SCALE(lp->dma_bitmode)) & 0xffff;
+
+        SONIC_WRITE(SONIC_RSA, lp->rra_laddr & 0xffff);
+        SONIC_WRITE(SONIC_REA, lp->rra_end);
+        SONIC_WRITE(SONIC_RRP, lp->rra_laddr & 0xffff);
+        SONIC_WRITE(SONIC_RWP, lp->cur_rwp);
+        SONIC_WRITE(SONIC_URRA, lp->rra_laddr >> 16);
+        SONIC_WRITE(SONIC_EOBC, (SONIC_RBSIZE >> 1) - (lp->dma_bitmode ? 2 : 1));
+
+        /* load the resource pointers */
+        if (sonic_debug > 3)
+                printk("sonic_init: issuing RRRA command\n");
+
+        SONIC_WRITE(SONIC_CMD, SONIC_CR_RRRA);
+        i = 0;
+        while (i++ < 100) {
+                if (SONIC_READ(SONIC_CMD) & SONIC_CR_RRRA)
+                        break;
+        }
+
+        if (sonic_debug > 2)
+                printk("sonic_init: status=%x i=%d\n", SONIC_READ(SONIC_CMD), i);
+
+        /*
+         * Initialize the receive descriptors so that they
+         * become a circular linked list, ie. let the last
+         * descriptor point to the first again.
+         */
+        if (sonic_debug > 2)
+                printk("sonic_init: initialize receive descriptors\n");
+        for (i=0; i<SONIC_NUM_RDS; i++) {
+                sonic_rda_put(dev, i, SONIC_RD_STATUS, 0);
+                sonic_rda_put(dev, i, SONIC_RD_PKTLEN, 0);
+                sonic_rda_put(dev, i, SONIC_RD_PKTPTR_L, 0);
+                sonic_rda_put(dev, i, SONIC_RD_PKTPTR_H, 0);
+                sonic_rda_put(dev, i, SONIC_RD_SEQNO, 0);
+                sonic_rda_put(dev, i, SONIC_RD_IN_USE, 1);
+                sonic_rda_put(dev, i, SONIC_RD_LINK,
+                        lp->rda_laddr +
+                        ((i+1) * SIZEOF_SONIC_RD * SONIC_BUS_SCALE(lp->dma_bitmode)));
+        }
+        /* fix last descriptor */
+        sonic_rda_put(dev, SONIC_NUM_RDS - 1, SONIC_RD_LINK,
+                (lp->rda_laddr & 0xffff) | SONIC_EOL);
+        lp->eol_rx = SONIC_NUM_RDS - 1;
+        lp->cur_rx = 0;
+        SONIC_WRITE(SONIC_URDA, lp->rda_laddr >> 16);
+        SONIC_WRITE(SONIC_CRDA, lp->rda_laddr & 0xffff);
+
+        /*
+         * initialize transmit descriptors
+         */
+        if (sonic_debug > 2)
+                printk("sonic_init: initialize transmit descriptors\n");
+        for (i = 0; i < SONIC_NUM_TDS; i++) {
+                sonic_tda_put(dev, i, SONIC_TD_STATUS, 0);
+                sonic_tda_put(dev, i, SONIC_TD_CONFIG, 0);
+                sonic_tda_put(dev, i, SONIC_TD_PKTSIZE, 0);
+                sonic_tda_put(dev, i, SONIC_TD_FRAG_COUNT, 0);
+                sonic_tda_put(dev, i, SONIC_TD_LINK,
+                        (lp->tda_laddr & 0xffff) +
+                        (i + 1) * SIZEOF_SONIC_TD * SONIC_BUS_SCALE(lp->dma_bitmode));
+                lp->tx_skb[i] = NULL;
+        }
+        /* fix last descriptor */
+        sonic_tda_put(dev, SONIC_NUM_TDS - 1, SONIC_TD_LINK,
+                (lp->tda_laddr & 0xffff));
+
+        SONIC_WRITE(SONIC_UTDA, lp->tda_laddr >> 16);
+        SONIC_WRITE(SONIC_CTDA, lp->tda_laddr & 0xffff);
+        lp->cur_tx = lp->next_tx = 0;
+        lp->eol_tx = SONIC_NUM_TDS - 1;
+
+        /*
+         * put our own address to CAM desc[0]
+         */
+        sonic_cda_put(dev, 0, SONIC_CD_CAP0, dev->dev_addr[1] << 8 | dev->dev_addr[0]);
+        sonic_cda_put(dev, 0, SONIC_CD_CAP1, dev->dev_addr[3] << 8 | dev->dev_addr[2]);
+        sonic_cda_put(dev, 0, SONIC_CD_CAP2, dev->dev_addr[5] << 8 | dev->dev_addr[4]);
+        sonic_set_cam_enable(dev, 1);
+
+        for (i = 0; i < 16; i++)
+                sonic_cda_put(dev, i, SONIC_CD_ENTRY_POINTER, i);
+
+        /*
+         * initialize CAM registers
+         */
+        SONIC_WRITE(SONIC_CDP, lp->cda_laddr & 0xffff);
+        SONIC_WRITE(SONIC_CDC, 16);
+
+        /*
+         * load the CAM
+         */
+        SONIC_WRITE(SONIC_CMD, SONIC_CR_LCAM);
+
+        i = 0;
+        while (i++ < 100) {
+                if (SONIC_READ(SONIC_ISR) & SONIC_INT_LCD)
+                        break;
+        }
+        if (sonic_debug > 2) {
+                printk("sonic_init: CMD=%x, ISR=%x\n, i=%d",
+                       SONIC_READ(SONIC_CMD), SONIC_READ(SONIC_ISR), i);
+        }
+
+        /*
+         * enable receiver, disable loopback
+         * and enable all interrupts
+         */
+        SONIC_WRITE(SONIC_CMD, SONIC_CR_RXEN | SONIC_CR_STP);
+        SONIC_WRITE(SONIC_RCR, SONIC_RCR_DEFAULT);
+        SONIC_WRITE(SONIC_TCR, SONIC_TCR_DEFAULT);
+        SONIC_WRITE(SONIC_ISR, 0x7fff);
+        SONIC_WRITE(SONIC_IMR, SONIC_IMR_DEFAULT);
+
+        cmd = SONIC_READ(SONIC_CMD);
+        if ((cmd & SONIC_CR_RXEN) == 0 || (cmd & SONIC_CR_STP) == 0)
+                printk(KERN_ERR "sonic_init: failed, status=%x\n", cmd);
+
+        if (sonic_debug > 2)
+                printk("sonic_init: new status=%x\n",
+                       SONIC_READ(SONIC_CMD));
+
+        return 0;
+}
+
+MODULE_LICENSE("GPL");