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path: root/drivers/net/ariadne.c
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Diffstat (limited to 'drivers/net/ariadne.c')
-rw-r--r--drivers/net/ariadne.c878
1 files changed, 878 insertions, 0 deletions
diff --git a/drivers/net/ariadne.c b/drivers/net/ariadne.c
new file mode 100644
index 00000000000..9fe93acfc8e
--- /dev/null
+++ b/drivers/net/ariadne.c
@@ -0,0 +1,878 @@
+/*
+ * Amiga Linux/m68k Ariadne Ethernet Driver
+ *
+ * © Copyright 1995-2003 by Geert Uytterhoeven (geert@linux-m68k.org)
+ * Peter De Schrijver (p2@mind.be)
+ *
+ * ---------------------------------------------------------------------------
+ *
+ * This program is based on
+ *
+ * lance.c: An AMD LANCE ethernet driver for linux.
+ * Written 1993-94 by Donald Becker.
+ *
+ * Am79C960: PCnet(tm)-ISA Single-Chip Ethernet Controller
+ * Advanced Micro Devices
+ * Publication #16907, Rev. B, Amendment/0, May 1994
+ *
+ * MC68230: Parallel Interface/Timer (PI/T)
+ * Motorola Semiconductors, December, 1983
+ *
+ * ---------------------------------------------------------------------------
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of the Linux
+ * distribution for more details.
+ *
+ * ---------------------------------------------------------------------------
+ *
+ * The Ariadne is a Zorro-II board made by Village Tronic. It contains:
+ *
+ * - an Am79C960 PCnet-ISA Single-Chip Ethernet Controller with both
+ * 10BASE-2 (thin coax) and 10BASE-T (UTP) connectors
+ *
+ * - an MC68230 Parallel Interface/Timer configured as 2 parallel ports
+ */
+
+#include <linux/module.h>
+#include <linux/stddef.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/interrupt.h>
+#include <linux/skbuff.h>
+#include <linux/init.h>
+#include <linux/zorro.h>
+#include <linux/bitops.h>
+
+#include <asm/amigaints.h>
+#include <asm/amigahw.h>
+#include <asm/irq.h>
+
+#include "ariadne.h"
+
+
+#ifdef ARIADNE_DEBUG
+int ariadne_debug = ARIADNE_DEBUG;
+#else
+int ariadne_debug = 1;
+#endif
+
+
+ /*
+ * Macros to Fix Endianness problems
+ */
+
+ /* Swap the Bytes in a WORD */
+#define swapw(x) (((x>>8)&0x00ff)|((x<<8)&0xff00))
+ /* Get the Low BYTE in a WORD */
+#define lowb(x) (x&0xff)
+ /* Get the Swapped High WORD in a LONG */
+#define swhighw(x) ((((x)>>8)&0xff00)|(((x)>>24)&0x00ff))
+ /* Get the Swapped Low WORD in a LONG */
+#define swloww(x) ((((x)<<8)&0xff00)|(((x)>>8)&0x00ff))
+
+
+ /*
+ * Transmit/Receive Ring Definitions
+ */
+
+#define TX_RING_SIZE 5
+#define RX_RING_SIZE 16
+
+#define PKT_BUF_SIZE 1520
+
+
+ /*
+ * Private Device Data
+ */
+
+struct ariadne_private {
+ volatile struct TDRE *tx_ring[TX_RING_SIZE];
+ volatile struct RDRE *rx_ring[RX_RING_SIZE];
+ volatile u_short *tx_buff[TX_RING_SIZE];
+ volatile u_short *rx_buff[RX_RING_SIZE];
+ int cur_tx, cur_rx; /* The next free ring entry */
+ int dirty_tx; /* The ring entries to be free()ed. */
+ struct net_device_stats stats;
+ char tx_full;
+};
+
+
+ /*
+ * Structure Created in the Ariadne's RAM Buffer
+ */
+
+struct lancedata {
+ struct TDRE tx_ring[TX_RING_SIZE];
+ struct RDRE rx_ring[RX_RING_SIZE];
+ u_short tx_buff[TX_RING_SIZE][PKT_BUF_SIZE/sizeof(u_short)];
+ u_short rx_buff[RX_RING_SIZE][PKT_BUF_SIZE/sizeof(u_short)];
+};
+
+static int ariadne_open(struct net_device *dev);
+static void ariadne_init_ring(struct net_device *dev);
+static int ariadne_start_xmit(struct sk_buff *skb, struct net_device *dev);
+static void ariadne_tx_timeout(struct net_device *dev);
+static int ariadne_rx(struct net_device *dev);
+static void ariadne_reset(struct net_device *dev);
+static irqreturn_t ariadne_interrupt(int irq, void *data, struct pt_regs *fp);
+static int ariadne_close(struct net_device *dev);
+static struct net_device_stats *ariadne_get_stats(struct net_device *dev);
+#ifdef HAVE_MULTICAST
+static void set_multicast_list(struct net_device *dev);
+#endif
+
+
+static void memcpyw(volatile u_short *dest, u_short *src, int len)
+{
+ while (len >= 2) {
+ *(dest++) = *(src++);
+ len -= 2;
+ }
+ if (len == 1)
+ *dest = (*(u_char *)src)<<8;
+}
+
+
+static int __devinit ariadne_init_one(struct zorro_dev *z,
+ const struct zorro_device_id *ent);
+static void __devexit ariadne_remove_one(struct zorro_dev *z);
+
+
+static struct zorro_device_id ariadne_zorro_tbl[] __devinitdata = {
+ { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE },
+ { 0 }
+};
+
+static struct zorro_driver ariadne_driver = {
+ .name = "ariadne",
+ .id_table = ariadne_zorro_tbl,
+ .probe = ariadne_init_one,
+ .remove = __devexit_p(ariadne_remove_one),
+};
+
+static int __devinit ariadne_init_one(struct zorro_dev *z,
+ const struct zorro_device_id *ent)
+{
+ unsigned long board = z->resource.start;
+ unsigned long base_addr = board+ARIADNE_LANCE;
+ unsigned long mem_start = board+ARIADNE_RAM;
+ struct resource *r1, *r2;
+ struct net_device *dev;
+ struct ariadne_private *priv;
+ int err;
+
+ r1 = request_mem_region(base_addr, sizeof(struct Am79C960), "Am79C960");
+ if (!r1)
+ return -EBUSY;
+ r2 = request_mem_region(mem_start, ARIADNE_RAM_SIZE, "RAM");
+ if (!r2) {
+ release_resource(r1);
+ return -EBUSY;
+ }
+
+ dev = alloc_etherdev(sizeof(struct ariadne_private));
+ if (dev == NULL) {
+ release_resource(r1);
+ release_resource(r2);
+ return -ENOMEM;
+ }
+
+ SET_MODULE_OWNER(dev);
+ priv = netdev_priv(dev);
+
+ r1->name = dev->name;
+ r2->name = dev->name;
+
+ dev->dev_addr[0] = 0x00;
+ dev->dev_addr[1] = 0x60;
+ dev->dev_addr[2] = 0x30;
+ dev->dev_addr[3] = (z->rom.er_SerialNumber>>16) & 0xff;
+ dev->dev_addr[4] = (z->rom.er_SerialNumber>>8) & 0xff;
+ dev->dev_addr[5] = z->rom.er_SerialNumber & 0xff;
+ dev->base_addr = ZTWO_VADDR(base_addr);
+ dev->mem_start = ZTWO_VADDR(mem_start);
+ dev->mem_end = dev->mem_start+ARIADNE_RAM_SIZE;
+
+ dev->open = &ariadne_open;
+ dev->stop = &ariadne_close;
+ dev->hard_start_xmit = &ariadne_start_xmit;
+ dev->tx_timeout = &ariadne_tx_timeout;
+ dev->watchdog_timeo = 5*HZ;
+ dev->get_stats = &ariadne_get_stats;
+ dev->set_multicast_list = &set_multicast_list;
+
+ err = register_netdev(dev);
+ if (err) {
+ release_resource(r1);
+ release_resource(r2);
+ free_netdev(dev);
+ return err;
+ }
+ zorro_set_drvdata(z, dev);
+
+ printk(KERN_INFO "%s: Ariadne at 0x%08lx, Ethernet Address "
+ "%02x:%02x:%02x:%02x:%02x:%02x\n", dev->name, board,
+ dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
+ dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
+
+ return 0;
+}
+
+
+static int ariadne_open(struct net_device *dev)
+{
+ volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
+ u_short in;
+ u_long version;
+ int i;
+
+ /* Reset the LANCE */
+ in = lance->Reset;
+
+ /* Stop the LANCE */
+ lance->RAP = CSR0; /* PCnet-ISA Controller Status */
+ lance->RDP = STOP;
+
+ /* Check the LANCE version */
+ lance->RAP = CSR88; /* Chip ID */
+ version = swapw(lance->RDP);
+ lance->RAP = CSR89; /* Chip ID */
+ version |= swapw(lance->RDP)<<16;
+ if ((version & 0x00000fff) != 0x00000003) {
+ printk(KERN_WARNING "ariadne_open: Couldn't find AMD Ethernet Chip\n");
+ return -EAGAIN;
+ }
+ if ((version & 0x0ffff000) != 0x00003000) {
+ printk(KERN_WARNING "ariadne_open: Couldn't find Am79C960 (Wrong part "
+ "number = %ld)\n", (version & 0x0ffff000)>>12);
+ return -EAGAIN;
+ }
+#if 0
+ printk(KERN_DEBUG "ariadne_open: Am79C960 (PCnet-ISA) Revision %ld\n",
+ (version & 0xf0000000)>>28);
+#endif
+
+ ariadne_init_ring(dev);
+
+ /* Miscellaneous Stuff */
+ lance->RAP = CSR3; /* Interrupt Masks and Deferral Control */
+ lance->RDP = 0x0000;
+ lance->RAP = CSR4; /* Test and Features Control */
+ lance->RDP = DPOLL|APAD_XMT|MFCOM|RCVCCOM|TXSTRTM|JABM;
+
+ /* Set the Multicast Table */
+ lance->RAP = CSR8; /* Logical Address Filter, LADRF[15:0] */
+ lance->RDP = 0x0000;
+ lance->RAP = CSR9; /* Logical Address Filter, LADRF[31:16] */
+ lance->RDP = 0x0000;
+ lance->RAP = CSR10; /* Logical Address Filter, LADRF[47:32] */
+ lance->RDP = 0x0000;
+ lance->RAP = CSR11; /* Logical Address Filter, LADRF[63:48] */
+ lance->RDP = 0x0000;
+
+ /* Set the Ethernet Hardware Address */
+ lance->RAP = CSR12; /* Physical Address Register, PADR[15:0] */
+ lance->RDP = ((u_short *)&dev->dev_addr[0])[0];
+ lance->RAP = CSR13; /* Physical Address Register, PADR[31:16] */
+ lance->RDP = ((u_short *)&dev->dev_addr[0])[1];
+ lance->RAP = CSR14; /* Physical Address Register, PADR[47:32] */
+ lance->RDP = ((u_short *)&dev->dev_addr[0])[2];
+
+ /* Set the Init Block Mode */
+ lance->RAP = CSR15; /* Mode Register */
+ lance->RDP = 0x0000;
+
+ /* Set the Transmit Descriptor Ring Pointer */
+ lance->RAP = CSR30; /* Base Address of Transmit Ring */
+ lance->RDP = swloww(ARIADNE_RAM+offsetof(struct lancedata, tx_ring));
+ lance->RAP = CSR31; /* Base Address of transmit Ring */
+ lance->RDP = swhighw(ARIADNE_RAM+offsetof(struct lancedata, tx_ring));
+
+ /* Set the Receive Descriptor Ring Pointer */
+ lance->RAP = CSR24; /* Base Address of Receive Ring */
+ lance->RDP = swloww(ARIADNE_RAM+offsetof(struct lancedata, rx_ring));
+ lance->RAP = CSR25; /* Base Address of Receive Ring */
+ lance->RDP = swhighw(ARIADNE_RAM+offsetof(struct lancedata, rx_ring));
+
+ /* Set the Number of RX and TX Ring Entries */
+ lance->RAP = CSR76; /* Receive Ring Length */
+ lance->RDP = swapw(((u_short)-RX_RING_SIZE));
+ lance->RAP = CSR78; /* Transmit Ring Length */
+ lance->RDP = swapw(((u_short)-TX_RING_SIZE));
+
+ /* Enable Media Interface Port Auto Select (10BASE-2/10BASE-T) */
+ lance->RAP = ISACSR2; /* Miscellaneous Configuration */
+ lance->IDP = ASEL;
+
+ /* LED Control */
+ lance->RAP = ISACSR5; /* LED1 Status */
+ lance->IDP = PSE|XMTE;
+ lance->RAP = ISACSR6; /* LED2 Status */
+ lance->IDP = PSE|COLE;
+ lance->RAP = ISACSR7; /* LED3 Status */
+ lance->IDP = PSE|RCVE;
+
+ netif_start_queue(dev);
+
+ i = request_irq(IRQ_AMIGA_PORTS, ariadne_interrupt, SA_SHIRQ,
+ dev->name, dev);
+ if (i) return i;
+
+ lance->RAP = CSR0; /* PCnet-ISA Controller Status */
+ lance->RDP = INEA|STRT;
+
+ return 0;
+}
+
+
+static void ariadne_init_ring(struct net_device *dev)
+{
+ struct ariadne_private *priv = netdev_priv(dev);
+ volatile struct lancedata *lancedata = (struct lancedata *)dev->mem_start;
+ int i;
+
+ netif_stop_queue(dev);
+
+ priv->tx_full = 0;
+ priv->cur_rx = priv->cur_tx = 0;
+ priv->dirty_tx = 0;
+
+ /* Set up TX Ring */
+ for (i = 0; i < TX_RING_SIZE; i++) {
+ volatile struct TDRE *t = &lancedata->tx_ring[i];
+ t->TMD0 = swloww(ARIADNE_RAM+offsetof(struct lancedata, tx_buff[i]));
+ t->TMD1 = swhighw(ARIADNE_RAM+offsetof(struct lancedata, tx_buff[i])) |
+ TF_STP | TF_ENP;
+ t->TMD2 = swapw((u_short)-PKT_BUF_SIZE);
+ t->TMD3 = 0;
+ priv->tx_ring[i] = &lancedata->tx_ring[i];
+ priv->tx_buff[i] = lancedata->tx_buff[i];
+#if 0
+ printk(KERN_DEBUG "TX Entry %2d at %p, Buf at %p\n", i,
+ &lancedata->tx_ring[i], lancedata->tx_buff[i]);
+#endif
+ }
+
+ /* Set up RX Ring */
+ for (i = 0; i < RX_RING_SIZE; i++) {
+ volatile struct RDRE *r = &lancedata->rx_ring[i];
+ r->RMD0 = swloww(ARIADNE_RAM+offsetof(struct lancedata, rx_buff[i]));
+ r->RMD1 = swhighw(ARIADNE_RAM+offsetof(struct lancedata, rx_buff[i])) |
+ RF_OWN;
+ r->RMD2 = swapw((u_short)-PKT_BUF_SIZE);
+ r->RMD3 = 0x0000;
+ priv->rx_ring[i] = &lancedata->rx_ring[i];
+ priv->rx_buff[i] = lancedata->rx_buff[i];
+#if 0
+ printk(KERN_DEBUG "RX Entry %2d at %p, Buf at %p\n", i,
+ &lancedata->rx_ring[i], lancedata->rx_buff[i]);
+#endif
+ }
+}
+
+
+static int ariadne_close(struct net_device *dev)
+{
+ struct ariadne_private *priv = netdev_priv(dev);
+ volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
+
+ netif_stop_queue(dev);
+
+ lance->RAP = CSR112; /* Missed Frame Count */
+ priv->stats.rx_missed_errors = swapw(lance->RDP);
+ lance->RAP = CSR0; /* PCnet-ISA Controller Status */
+
+ if (ariadne_debug > 1) {
+ printk(KERN_DEBUG "%s: Shutting down ethercard, status was %2.2x.\n",
+ dev->name, lance->RDP);
+ printk(KERN_DEBUG "%s: %lu packets missed\n", dev->name,
+ priv->stats.rx_missed_errors);
+ }
+
+ /* We stop the LANCE here -- it occasionally polls memory if we don't. */
+ lance->RDP = STOP;
+
+ free_irq(IRQ_AMIGA_PORTS, dev);
+
+ return 0;
+}
+
+
+static inline void ariadne_reset(struct net_device *dev)
+{
+ volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
+
+ lance->RAP = CSR0; /* PCnet-ISA Controller Status */
+ lance->RDP = STOP;
+ ariadne_init_ring(dev);
+ lance->RDP = INEA|STRT;
+ netif_start_queue(dev);
+}
+
+
+static irqreturn_t ariadne_interrupt(int irq, void *data, struct pt_regs *fp)
+{
+ struct net_device *dev = (struct net_device *)data;
+ volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
+ struct ariadne_private *priv;
+ int csr0, boguscnt;
+ int handled = 0;
+
+ if (dev == NULL) {
+ printk(KERN_WARNING "ariadne_interrupt(): irq for unknown device.\n");
+ return IRQ_NONE;
+ }
+
+ lance->RAP = CSR0; /* PCnet-ISA Controller Status */
+
+ if (!(lance->RDP & INTR)) /* Check if any interrupt has been */
+ return IRQ_NONE; /* generated by the board. */
+
+ priv = netdev_priv(dev);
+
+ boguscnt = 10;
+ while ((csr0 = lance->RDP) & (ERR|RINT|TINT) && --boguscnt >= 0) {
+ /* Acknowledge all of the current interrupt sources ASAP. */
+ lance->RDP = csr0 & ~(INEA|TDMD|STOP|STRT|INIT);
+
+#if 0
+ if (ariadne_debug > 5) {
+ printk(KERN_DEBUG "%s: interrupt csr0=%#2.2x new csr=%#2.2x.",
+ dev->name, csr0, lance->RDP);
+ printk("[");
+ if (csr0 & INTR)
+ printk(" INTR");
+ if (csr0 & INEA)
+ printk(" INEA");
+ if (csr0 & RXON)
+ printk(" RXON");
+ if (csr0 & TXON)
+ printk(" TXON");
+ if (csr0 & TDMD)
+ printk(" TDMD");
+ if (csr0 & STOP)
+ printk(" STOP");
+ if (csr0 & STRT)
+ printk(" STRT");
+ if (csr0 & INIT)
+ printk(" INIT");
+ if (csr0 & ERR)
+ printk(" ERR");
+ if (csr0 & BABL)
+ printk(" BABL");
+ if (csr0 & CERR)
+ printk(" CERR");
+ if (csr0 & MISS)
+ printk(" MISS");
+ if (csr0 & MERR)
+ printk(" MERR");
+ if (csr0 & RINT)
+ printk(" RINT");
+ if (csr0 & TINT)
+ printk(" TINT");
+ if (csr0 & IDON)
+ printk(" IDON");
+ printk(" ]\n");
+ }
+#endif
+
+ if (csr0 & RINT) { /* Rx interrupt */
+ handled = 1;
+ ariadne_rx(dev);
+ }
+
+ if (csr0 & TINT) { /* Tx-done interrupt */
+ int dirty_tx = priv->dirty_tx;
+
+ handled = 1;
+ while (dirty_tx < priv->cur_tx) {
+ int entry = dirty_tx % TX_RING_SIZE;
+ int status = lowb(priv->tx_ring[entry]->TMD1);
+
+ if (status & TF_OWN)
+ break; /* It still hasn't been Txed */
+
+ priv->tx_ring[entry]->TMD1 &= 0xff00;
+
+ if (status & TF_ERR) {
+ /* There was an major error, log it. */
+ int err_status = priv->tx_ring[entry]->TMD3;
+ priv->stats.tx_errors++;
+ if (err_status & EF_RTRY)
+ priv->stats.tx_aborted_errors++;
+ if (err_status & EF_LCAR)
+ priv->stats.tx_carrier_errors++;
+ if (err_status & EF_LCOL)
+ priv->stats.tx_window_errors++;
+ if (err_status & EF_UFLO) {
+ /* Ackk! On FIFO errors the Tx unit is turned off! */
+ priv->stats.tx_fifo_errors++;
+ /* Remove this verbosity later! */
+ printk(KERN_ERR "%s: Tx FIFO error! Status %4.4x.\n",
+ dev->name, csr0);
+ /* Restart the chip. */
+ lance->RDP = STRT;
+ }
+ } else {
+ if (status & (TF_MORE|TF_ONE))
+ priv->stats.collisions++;
+ priv->stats.tx_packets++;
+ }
+ dirty_tx++;
+ }
+
+#ifndef final_version
+ if (priv->cur_tx - dirty_tx >= TX_RING_SIZE) {
+ printk(KERN_ERR "out-of-sync dirty pointer, %d vs. %d, "
+ "full=%d.\n", dirty_tx, priv->cur_tx, priv->tx_full);
+ dirty_tx += TX_RING_SIZE;
+ }
+#endif
+
+ if (priv->tx_full && netif_queue_stopped(dev) &&
+ dirty_tx > priv->cur_tx - TX_RING_SIZE + 2) {
+ /* The ring is no longer full. */
+ priv->tx_full = 0;
+ netif_wake_queue(dev);
+ }
+
+ priv->dirty_tx = dirty_tx;
+ }
+
+ /* Log misc errors. */
+ if (csr0 & BABL) {
+ handled = 1;
+ priv->stats.tx_errors++; /* Tx babble. */
+ }
+ if (csr0 & MISS) {
+ handled = 1;
+ priv->stats.rx_errors++; /* Missed a Rx frame. */
+ }
+ if (csr0 & MERR) {
+ handled = 1;
+ printk(KERN_ERR "%s: Bus master arbitration failure, status "
+ "%4.4x.\n", dev->name, csr0);
+ /* Restart the chip. */
+ lance->RDP = STRT;
+ }
+ }
+
+ /* Clear any other interrupt, and set interrupt enable. */
+ lance->RAP = CSR0; /* PCnet-ISA Controller Status */
+ lance->RDP = INEA|BABL|CERR|MISS|MERR|IDON;
+
+#if 0
+ if (ariadne_debug > 4)
+ printk(KERN_DEBUG "%s: exiting interrupt, csr%d=%#4.4x.\n", dev->name,
+ lance->RAP, lance->RDP);
+#endif
+ return IRQ_RETVAL(handled);
+}
+
+
+static void ariadne_tx_timeout(struct net_device *dev)
+{
+ volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
+
+ printk(KERN_ERR "%s: transmit timed out, status %4.4x, resetting.\n",
+ dev->name, lance->RDP);
+ ariadne_reset(dev);
+ netif_wake_queue(dev);
+}
+
+
+static int ariadne_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct ariadne_private *priv = netdev_priv(dev);
+ volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
+ int entry;
+ unsigned long flags;
+ int len = skb->len;
+
+#if 0
+ if (ariadne_debug > 3) {
+ lance->RAP = CSR0; /* PCnet-ISA Controller Status */
+ printk(KERN_DEBUG "%s: ariadne_start_xmit() called, csr0 %4.4x.\n",
+ dev->name, lance->RDP);
+ lance->RDP = 0x0000;
+ }
+#endif
+
+ /* FIXME: is the 79C960 new enough to do its own padding right ? */
+ if (skb->len < ETH_ZLEN)
+ {
+ skb = skb_padto(skb, ETH_ZLEN);
+ if (skb == NULL)
+ return 0;
+ len = ETH_ZLEN;
+ }
+
+ /* Fill in a Tx ring entry */
+
+#if 0
+ printk(KERN_DEBUG "TX pkt type 0x%04x from ", ((u_short *)skb->data)[6]);
+ {
+ int i;
+ u_char *ptr = &((u_char *)skb->data)[6];
+ for (i = 0; i < 6; i++)
+ printk("%02x", ptr[i]);
+ }
+ printk(" to ");
+ {
+ int i;
+ u_char *ptr = (u_char *)skb->data;
+ for (i = 0; i < 6; i++)
+ printk("%02x", ptr[i]);
+ }
+ printk(" data 0x%08x len %d\n", (int)skb->data, (int)skb->len);
+#endif
+
+ local_irq_save(flags);
+
+ entry = priv->cur_tx % TX_RING_SIZE;
+
+ /* Caution: the write order is important here, set the base address with
+ the "ownership" bits last. */
+
+ priv->tx_ring[entry]->TMD2 = swapw((u_short)-skb->len);
+ priv->tx_ring[entry]->TMD3 = 0x0000;
+ memcpyw(priv->tx_buff[entry], (u_short *)skb->data, len);
+
+#if 0
+ {
+ int i, len;
+
+ len = skb->len > 64 ? 64 : skb->len;
+ len >>= 1;
+ for (i = 0; i < len; i += 8) {
+ int j;
+ printk(KERN_DEBUG "%04x:", i);
+ for (j = 0; (j < 8) && ((i+j) < len); j++) {
+ if (!(j & 1))
+ printk(" ");
+ printk("%04x", priv->tx_buff[entry][i+j]);
+ }
+ printk("\n");
+ }
+ }
+#endif
+
+ priv->tx_ring[entry]->TMD1 = (priv->tx_ring[entry]->TMD1&0xff00)|TF_OWN|TF_STP|TF_ENP;
+
+ dev_kfree_skb(skb);
+
+ priv->cur_tx++;
+ if ((priv->cur_tx >= TX_RING_SIZE) && (priv->dirty_tx >= TX_RING_SIZE)) {
+
+#if 0
+ printk(KERN_DEBUG "*** Subtracting TX_RING_SIZE from cur_tx (%d) and "
+ "dirty_tx (%d)\n", priv->cur_tx, priv->dirty_tx);
+#endif
+
+ priv->cur_tx -= TX_RING_SIZE;
+ priv->dirty_tx -= TX_RING_SIZE;
+ }
+
+ /* Trigger an immediate send poll. */
+ lance->RAP = CSR0; /* PCnet-ISA Controller Status */
+ lance->RDP = INEA|TDMD;
+
+ dev->trans_start = jiffies;
+
+ if (lowb(priv->tx_ring[(entry+1) % TX_RING_SIZE]->TMD1) != 0) {
+ netif_stop_queue(dev);
+ priv->tx_full = 1;
+ }
+ local_irq_restore(flags);
+
+ return 0;
+}
+
+
+static int ariadne_rx(struct net_device *dev)
+{
+ struct ariadne_private *priv = netdev_priv(dev);
+ int entry = priv->cur_rx % RX_RING_SIZE;
+ int i;
+
+ /* If we own the next entry, it's a new packet. Send it up. */
+ while (!(lowb(priv->rx_ring[entry]->RMD1) & RF_OWN)) {
+ int status = lowb(priv->rx_ring[entry]->RMD1);
+
+ if (status != (RF_STP|RF_ENP)) { /* There was an error. */
+ /* There is a tricky error noted by John Murphy,
+ <murf@perftech.com> to Russ Nelson: Even with full-sized
+ buffers it's possible for a jabber packet to use two
+ buffers, with only the last correctly noting the error. */
+ if (status & RF_ENP)
+ /* Only count a general error at the end of a packet.*/
+ priv->stats.rx_errors++;
+ if (status & RF_FRAM)
+ priv->stats.rx_frame_errors++;
+ if (status & RF_OFLO)
+ priv->stats.rx_over_errors++;
+ if (status & RF_CRC)
+ priv->stats.rx_crc_errors++;
+ if (status & RF_BUFF)
+ priv->stats.rx_fifo_errors++;
+ priv->rx_ring[entry]->RMD1 &= 0xff00|RF_STP|RF_ENP;
+ } else {
+ /* Malloc up new buffer, compatible with net-3. */
+ short pkt_len = swapw(priv->rx_ring[entry]->RMD3);
+ struct sk_buff *skb;
+
+ skb = dev_alloc_skb(pkt_len+2);
+ if (skb == NULL) {
+ printk(KERN_WARNING "%s: Memory squeeze, deferring packet.\n",
+ dev->name);
+ for (i = 0; i < RX_RING_SIZE; i++)
+ if (lowb(priv->rx_ring[(entry+i) % RX_RING_SIZE]->RMD1) & RF_OWN)
+ break;
+
+ if (i > RX_RING_SIZE-2) {
+ priv->stats.rx_dropped++;
+ priv->rx_ring[entry]->RMD1 |= RF_OWN;
+ priv->cur_rx++;
+ }
+ break;
+ }
+
+
+ skb->dev = dev;
+ skb_reserve(skb,2); /* 16 byte align */
+ skb_put(skb,pkt_len); /* Make room */
+ eth_copy_and_sum(skb, (char *)priv->rx_buff[entry], pkt_len,0);
+ skb->protocol=eth_type_trans(skb,dev);
+#if 0
+ printk(KERN_DEBUG "RX pkt type 0x%04x from ",
+ ((u_short *)skb->data)[6]);
+ {
+ int i;
+ u_char *ptr = &((u_char *)skb->data)[6];
+ for (i = 0; i < 6; i++)
+ printk("%02x", ptr[i]);
+ }
+ printk(" to ");
+ {
+ int i;
+ u_char *ptr = (u_char *)skb->data;
+ for (i = 0; i < 6; i++)
+ printk("%02x", ptr[i]);
+ }
+ printk(" data 0x%08x len %d\n", (int)skb->data, (int)skb->len);
+#endif
+
+ netif_rx(skb);
+ dev->last_rx = jiffies;
+ priv->stats.rx_packets++;
+ priv->stats.rx_bytes += pkt_len;
+ }
+
+ priv->rx_ring[entry]->RMD1 |= RF_OWN;
+ entry = (++priv->cur_rx) % RX_RING_SIZE;
+ }
+
+ priv->cur_rx = priv->cur_rx % RX_RING_SIZE;
+
+ /* We should check that at least two ring entries are free. If not,
+ we should free one and mark stats->rx_dropped++. */
+
+ return 0;
+}
+
+
+static struct net_device_stats *ariadne_get_stats(struct net_device *dev)
+{
+ struct ariadne_private *priv = netdev_priv(dev);
+ volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
+ short saved_addr;
+ unsigned long flags;
+
+ local_irq_save(flags);
+ saved_addr = lance->RAP;
+ lance->RAP = CSR112; /* Missed Frame Count */
+ priv->stats.rx_missed_errors = swapw(lance->RDP);
+ lance->RAP = saved_addr;
+ local_irq_restore(flags);
+
+ return &priv->stats;
+}
+
+
+/* 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 set_multicast_list(struct net_device *dev)
+{
+ volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
+
+ if (!netif_running(dev))
+ return;
+
+ netif_stop_queue(dev);
+
+ /* We take the simple way out and always enable promiscuous mode. */
+ lance->RAP = CSR0; /* PCnet-ISA Controller Status */
+ lance->RDP = STOP; /* Temporarily stop the lance. */
+ ariadne_init_ring(dev);
+
+ if (dev->flags & IFF_PROMISC) {
+ /* Log any net taps. */
+ printk(KERN_INFO "%s: Promiscuous mode enabled.\n", dev->name);
+ lance->RAP = CSR15; /* Mode Register */
+ lance->RDP = PROM; /* Set promiscuous mode */
+ } else {
+ short multicast_table[4];
+ int num_addrs = dev->mc_count;
+ int i;
+ /* We don't use the multicast table, but rely on upper-layer filtering. */
+ memset(multicast_table, (num_addrs == 0) ? 0 : -1,
+ sizeof(multicast_table));
+ for (i = 0; i < 4; i++) {
+ lance->RAP = CSR8+(i<<8); /* Logical Address Filter */
+ lance->RDP = swapw(multicast_table[i]);
+ }
+ lance->RAP = CSR15; /* Mode Register */
+ lance->RDP = 0x0000; /* Unset promiscuous mode */
+ }
+
+ lance->RAP = CSR0; /* PCnet-ISA Controller Status */
+ lance->RDP = INEA|STRT|IDON; /* Resume normal operation. */
+
+ netif_wake_queue(dev);
+}
+
+
+static void __devexit ariadne_remove_one(struct zorro_dev *z)
+{
+ struct net_device *dev = zorro_get_drvdata(z);
+
+ unregister_netdev(dev);
+ release_mem_region(ZTWO_PADDR(dev->base_addr), sizeof(struct Am79C960));
+ release_mem_region(ZTWO_PADDR(dev->mem_start), ARIADNE_RAM_SIZE);
+ free_netdev(dev);
+}
+
+static int __init ariadne_init_module(void)
+{
+ return zorro_module_init(&ariadne_driver);
+}
+
+static void __exit ariadne_cleanup_module(void)
+{
+ zorro_unregister_driver(&ariadne_driver);
+}
+
+module_init(ariadne_init_module);
+module_exit(ariadne_cleanup_module);
+
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-27 10:38:51 +0000