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path: root/drivers/net/sonic.c
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-rw-r--r--drivers/net/sonic.c616
1 files changed, 616 insertions, 0 deletions
diff --git a/drivers/net/sonic.c b/drivers/net/sonic.c
new file mode 100644
index 00000000000..cdc9cc873e0
--- /dev/null
+++ b/drivers/net/sonic.c
@@ -0,0 +1,616 @@
+/*
+ * sonic.c
+ *
+ * (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
+ */
+
+/*
+ * 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.
+ */
+
+
+
+/*
+ * 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)
+{
+ if (sonic_debug > 2)
+ printk("sonic_open: initializing sonic driver.\n");
+
+ /*
+ * We don't need to deal with auto-irq stuff since we
+ * hardwire the sonic interrupt.
+ */
+/*
+ * XXX Horrible work around: We install sonic_interrupt as fast interrupt.
+ * This means that during execution of the handler interrupt are disabled
+ * covering another bug otherwise corrupting data. This doesn't mean
+ * this glue works ok under all situations.
+ */
+// if (sonic_request_irq(dev->irq, &sonic_interrupt, 0, "sonic", dev)) {
+ if (sonic_request_irq(dev->irq, &sonic_interrupt, SA_INTERRUPT,
+ "sonic", dev)) {
+ printk("\n%s: unable to get IRQ %d .\n", dev->name, dev->irq);
+ return -EAGAIN;
+ }
+
+ /*
+ * 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)
+{
+ unsigned int base_addr = dev->base_addr;
+
+ if (sonic_debug > 2)
+ printk("sonic_close\n");
+
+ netif_stop_queue(dev);
+
+ /*
+ * stop the SONIC, disable interrupts
+ */
+ SONIC_WRITE(SONIC_ISR, 0x7fff);
+ SONIC_WRITE(SONIC_IMR, 0);
+ SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
+
+ sonic_free_irq(dev->irq, dev); /* release the IRQ */
+
+ return 0;
+}
+
+static void sonic_tx_timeout(struct net_device *dev)
+{
+ struct sonic_local *lp = (struct sonic_local *) dev->priv;
+ printk("%s: transmit timed out.\n", dev->name);
+
+ /* Try to restart the adaptor. */
+ sonic_init(dev);
+ lp->stats.tx_errors++;
+ dev->trans_start = jiffies;
+ netif_wake_queue(dev);
+}
+
+/*
+ * transmit packet
+ */
+static int sonic_send_packet(struct sk_buff *skb, struct net_device *dev)
+{
+ struct sonic_local *lp = (struct sonic_local *) dev->priv;
+ unsigned int base_addr = dev->base_addr;
+ unsigned int laddr;
+ int entry, length;
+
+ netif_stop_queue(dev);
+
+ if (sonic_debug > 2)
+ printk("sonic_send_packet: skb=%p, dev=%p\n", skb, dev);
+
+ /*
+ * Map the packet data into the logical DMA address space
+ */
+ if ((laddr = vdma_alloc(CPHYSADDR(skb->data), skb->len)) == ~0UL) {
+ printk("%s: no VDMA entry for transmit available.\n",
+ dev->name);
+ dev_kfree_skb(skb);
+ netif_start_queue(dev);
+ return 1;
+ }
+ entry = lp->cur_tx & SONIC_TDS_MASK;
+ lp->tx_laddr[entry] = laddr;
+ lp->tx_skb[entry] = skb;
+
+ length = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
+ flush_cache_all();
+
+ /*
+ * Setup the transmit descriptor and issue the transmit command.
+ */
+ lp->tda[entry].tx_status = 0; /* clear status */
+ lp->tda[entry].tx_frag_count = 1; /* single fragment */
+ lp->tda[entry].tx_pktsize = length; /* length of packet */
+ lp->tda[entry].tx_frag_ptr_l = laddr & 0xffff;
+ lp->tda[entry].tx_frag_ptr_h = laddr >> 16;
+ lp->tda[entry].tx_frag_size = length;
+ lp->cur_tx++;
+ lp->stats.tx_bytes += length;
+
+ if (sonic_debug > 2)
+ printk("sonic_send_packet: issueing Tx command\n");
+
+ SONIC_WRITE(SONIC_CMD, SONIC_CR_TXP);
+
+ dev->trans_start = jiffies;
+
+ if (lp->cur_tx < lp->dirty_tx + SONIC_NUM_TDS)
+ netif_start_queue(dev);
+ else
+ lp->tx_full = 1;
+
+ return 0;
+}
+
+/*
+ * The typical workload of the driver:
+ * Handle the network interface interrupts.
+ */
+static irqreturn_t sonic_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct net_device *dev = (struct net_device *) dev_id;
+ unsigned int base_addr = dev->base_addr;
+ struct sonic_local *lp;
+ int status;
+
+ if (dev == NULL) {
+ printk("sonic_interrupt: irq %d for unknown device.\n", irq);
+ return IRQ_NONE;
+ }
+
+ lp = (struct sonic_local *) dev->priv;
+
+ status = SONIC_READ(SONIC_ISR);
+ SONIC_WRITE(SONIC_ISR, 0x7fff); /* clear all bits */
+
+ if (sonic_debug > 2)
+ printk("sonic_interrupt: ISR=%x\n", status);
+
+ if (status & SONIC_INT_PKTRX) {
+ sonic_rx(dev); /* got packet(s) */
+ }
+
+ if (status & SONIC_INT_TXDN) {
+ int dirty_tx = lp->dirty_tx;
+
+ while (dirty_tx < lp->cur_tx) {
+ int entry = dirty_tx & SONIC_TDS_MASK;
+ int status = lp->tda[entry].tx_status;
+
+ if (sonic_debug > 3)
+ printk
+ ("sonic_interrupt: status %d, cur_tx %d, dirty_tx %d\n",
+ status, lp->cur_tx, lp->dirty_tx);
+
+ if (status == 0) {
+ /* It still hasn't been Txed, kick the sonic again */
+ SONIC_WRITE(SONIC_CMD, SONIC_CR_TXP);
+ break;
+ }
+
+ /* put back EOL and free descriptor */
+ lp->tda[entry].tx_frag_count = 0;
+ lp->tda[entry].tx_status = 0;
+
+ if (status & 0x0001)
+ lp->stats.tx_packets++;
+ else {
+ lp->stats.tx_errors++;
+ if (status & 0x0642)
+ lp->stats.tx_aborted_errors++;
+ if (status & 0x0180)
+ lp->stats.tx_carrier_errors++;
+ if (status & 0x0020)
+ lp->stats.tx_window_errors++;
+ if (status & 0x0004)
+ lp->stats.tx_fifo_errors++;
+ }
+
+ /* We must free the original skb */
+ if (lp->tx_skb[entry]) {
+ dev_kfree_skb_irq(lp->tx_skb[entry]);
+ lp->tx_skb[entry] = 0;
+ }
+ /* and the VDMA address */
+ vdma_free(lp->tx_laddr[entry]);
+ dirty_tx++;
+ }
+
+ if (lp->tx_full
+ && dirty_tx + SONIC_NUM_TDS > lp->cur_tx + 2) {
+ /* The ring is no longer full, clear tbusy. */
+ lp->tx_full = 0;
+ netif_wake_queue(dev);
+ }
+
+ lp->dirty_tx = dirty_tx;
+ }
+
+ /*
+ * check error conditions
+ */
+ if (status & SONIC_INT_RFO) {
+ printk("%s: receive fifo underrun\n", dev->name);
+ lp->stats.rx_fifo_errors++;
+ }
+ if (status & SONIC_INT_RDE) {
+ printk("%s: receive descriptors exhausted\n", dev->name);
+ lp->stats.rx_dropped++;
+ }
+ if (status & SONIC_INT_RBE) {
+ printk("%s: receive buffer exhausted\n", dev->name);
+ lp->stats.rx_dropped++;
+ }
+ if (status & SONIC_INT_RBAE) {
+ printk("%s: receive buffer area exhausted\n", dev->name);
+ lp->stats.rx_dropped++;
+ }
+
+ /* counter overruns; all counters are 16bit wide */
+ if (status & SONIC_INT_FAE)
+ lp->stats.rx_frame_errors += 65536;
+ if (status & SONIC_INT_CRC)
+ lp->stats.rx_crc_errors += 65536;
+ if (status & SONIC_INT_MP)
+ lp->stats.rx_missed_errors += 65536;
+
+ /* transmit error */
+ if (status & SONIC_INT_TXER)
+ lp->stats.tx_errors++;
+
+ /*
+ * clear interrupt bits and return
+ */
+ SONIC_WRITE(SONIC_ISR, status);
+ return IRQ_HANDLED;
+}
+
+/*
+ * We have a good packet(s), get it/them out of the buffers.
+ */
+static void sonic_rx(struct net_device *dev)
+{
+ unsigned int base_addr = dev->base_addr;
+ struct sonic_local *lp = (struct sonic_local *) dev->priv;
+ sonic_rd_t *rd = &lp->rda[lp->cur_rx & SONIC_RDS_MASK];
+ int status;
+
+ while (rd->in_use == 0) {
+ struct sk_buff *skb;
+ int pkt_len;
+ unsigned char *pkt_ptr;
+
+ status = rd->rx_status;
+ if (sonic_debug > 3)
+ printk("status %x, cur_rx %d, cur_rra %x\n",
+ status, lp->cur_rx, lp->cur_rra);
+ if (status & SONIC_RCR_PRX) {
+ pkt_len = rd->rx_pktlen;
+ pkt_ptr =
+ (char *)
+ sonic_chiptomem((rd->rx_pktptr_h << 16) +
+ rd->rx_pktptr_l);
+
+ if (sonic_debug > 3)
+ printk
+ ("pktptr %p (rba %p) h:%x l:%x, bsize h:%x l:%x\n",
+ pkt_ptr, lp->rba, rd->rx_pktptr_h,
+ rd->rx_pktptr_l,
+ SONIC_READ(SONIC_RBWC1),
+ SONIC_READ(SONIC_RBWC0));
+
+ /* Malloc up new buffer. */
+ skb = dev_alloc_skb(pkt_len + 2);
+ if (skb == NULL) {
+ printk
+ ("%s: Memory squeeze, dropping packet.\n",
+ dev->name);
+ lp->stats.rx_dropped++;
+ break;
+ }
+ skb->dev = dev;
+ skb_reserve(skb, 2); /* 16 byte align */
+ skb_put(skb, pkt_len); /* Make room */
+ eth_copy_and_sum(skb, pkt_ptr, pkt_len, 0);
+ skb->protocol = eth_type_trans(skb, dev);
+ netif_rx(skb); /* pass the packet to upper layers */
+ dev->last_rx = jiffies;
+ lp->stats.rx_packets++;
+ lp->stats.rx_bytes += pkt_len;
+
+ } 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++;
+ }
+
+ rd->in_use = 1;
+ rd = &lp->rda[(++lp->cur_rx) & SONIC_RDS_MASK];
+ /* now give back the buffer to the receive buffer area */
+ if (status & SONIC_RCR_LPKT) {
+ /*
+ * this was the last packet out of the current receice buffer
+ * give the buffer back to the SONIC
+ */
+ lp->cur_rra += sizeof(sonic_rr_t);
+ if (lp->cur_rra >
+ (lp->rra_laddr +
+ (SONIC_NUM_RRS -
+ 1) * sizeof(sonic_rr_t))) lp->cur_rra =
+ lp->rra_laddr;
+ SONIC_WRITE(SONIC_RWP, lp->cur_rra & 0xffff);
+ } else
+ printk
+ ("%s: rx desc without RCR_LPKT. Shouldn't happen !?\n",
+ dev->name);
+ }
+ /*
+ * If any worth-while packets have been received, dev_rint()
+ * 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 = (struct sonic_local *) dev->priv;
+ unsigned int base_addr = dev->base_addr;
+
+ /* 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 = (struct sonic_local *) dev->priv;
+ unsigned int base_addr = dev->base_addr;
+ unsigned int rcr;
+ struct dev_mc_list *dmi = dev->mc_list;
+ 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) || (dev->mc_count > 15)) {
+ rcr |= SONIC_RCR_AMC;
+ } else {
+ if (sonic_debug > 2)
+ printk
+ ("sonic_multicast_list: mc_count %d\n",
+ dev->mc_count);
+ lp->cda.cam_enable = 1; /* always enable our own address */
+ for (i = 1; i <= dev->mc_count; i++) {
+ addr = dmi->dmi_addr;
+ dmi = dmi->next;
+ lp->cda.cam_desc[i].cam_cap0 =
+ addr[1] << 8 | addr[0];
+ lp->cda.cam_desc[i].cam_cap1 =
+ addr[3] << 8 | addr[2];
+ lp->cda.cam_desc[i].cam_cap2 =
+ addr[5] << 8 | addr[4];
+ lp->cda.cam_enable |= (1 << 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 base_addr = dev->base_addr;
+ unsigned int cmd;
+ struct sonic_local *lp = (struct sonic_local *) dev->priv;
+ unsigned int rra_start;
+ unsigned int rra_end;
+ int i;
+
+ /*
+ * put the Sonic into software-reset mode and
+ * disable all interrupts
+ */
+ SONIC_WRITE(SONIC_ISR, 0x7fff);
+ SONIC_WRITE(SONIC_IMR, 0);
+ 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");
+
+ rra_start = lp->rra_laddr & 0xffff;
+ rra_end =
+ (rra_start + (SONIC_NUM_RRS * sizeof(sonic_rr_t))) & 0xffff;
+
+ for (i = 0; i < SONIC_NUM_RRS; i++) {
+ lp->rra[i].rx_bufadr_l =
+ (lp->rba_laddr + i * SONIC_RBSIZE) & 0xffff;
+ lp->rra[i].rx_bufadr_h =
+ (lp->rba_laddr + i * SONIC_RBSIZE) >> 16;
+ lp->rra[i].rx_bufsize_l = SONIC_RBSIZE >> 1;
+ lp->rra[i].rx_bufsize_h = 0;
+ }
+
+ /* initialize all RRA registers */
+ SONIC_WRITE(SONIC_RSA, rra_start);
+ SONIC_WRITE(SONIC_REA, rra_end);
+ SONIC_WRITE(SONIC_RRP, rra_start);
+ SONIC_WRITE(SONIC_RWP, rra_end);
+ SONIC_WRITE(SONIC_URRA, lp->rra_laddr >> 16);
+ SONIC_WRITE(SONIC_EOBC, (SONIC_RBSIZE - 2) >> 1);
+
+ lp->cur_rra =
+ lp->rra_laddr + (SONIC_NUM_RRS - 1) * sizeof(sonic_rr_t);
+
+ /* load the resource pointers */
+ if (sonic_debug > 3)
+ printk("sonic_init: issueing 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\n", SONIC_READ(SONIC_CMD));
+
+ /*
+ * 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++) {
+ lp->rda[i].rx_status = 0;
+ lp->rda[i].rx_pktlen = 0;
+ lp->rda[i].rx_pktptr_l = 0;
+ lp->rda[i].rx_pktptr_h = 0;
+ lp->rda[i].rx_seqno = 0;
+ lp->rda[i].in_use = 1;
+ lp->rda[i].link =
+ lp->rda_laddr + (i + 1) * sizeof(sonic_rd_t);
+ }
+ /* fix last descriptor */
+ lp->rda[SONIC_NUM_RDS - 1].link = lp->rda_laddr;
+ 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++) {
+ lp->tda[i].tx_status = 0;
+ lp->tda[i].tx_config = 0;
+ lp->tda[i].tx_pktsize = 0;
+ lp->tda[i].tx_frag_count = 0;
+ lp->tda[i].link =
+ (lp->tda_laddr +
+ (i + 1) * sizeof(sonic_td_t)) | SONIC_END_OF_LINKS;
+ }
+ lp->tda[SONIC_NUM_TDS - 1].link =
+ (lp->tda_laddr & 0xffff) | SONIC_END_OF_LINKS;
+
+ SONIC_WRITE(SONIC_UTDA, lp->tda_laddr >> 16);
+ SONIC_WRITE(SONIC_CTDA, lp->tda_laddr & 0xffff);
+ lp->cur_tx = lp->dirty_tx = 0;
+
+ /*
+ * put our own address to CAM desc[0]
+ */
+ lp->cda.cam_desc[0].cam_cap0 =
+ dev->dev_addr[1] << 8 | dev->dev_addr[0];
+ lp->cda.cam_desc[0].cam_cap1 =
+ dev->dev_addr[3] << 8 | dev->dev_addr[2];
+ lp->cda.cam_desc[0].cam_cap2 =
+ dev->dev_addr[5] << 8 | dev->dev_addr[4];
+ lp->cda.cam_enable = 1;
+
+ for (i = 0; i < 16; i++)
+ lp->cda.cam_desc[i].cam_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",
+ SONIC_READ(SONIC_CMD), SONIC_READ(SONIC_ISR));
+ }
+
+ /*
+ * 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("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");
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