Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

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");