patch-2.3.99-pre9 linux/drivers/net/stnic.c

• Lines: 303
• Date: Sat May 20 12:05:30 2000
• Orig file: v2.3.99-pre8/linux/drivers/net/stnic.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.99-pre8/linux/drivers/net/stnic.c linux/drivers/net/stnic.c
@@ -0,0 +1,302 @@
+/* stnic.c : A SH7750 specific part of driver for NS DP83902A ST-NIC.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1999 kaz Kojima
+ */
+
+#include <linux/module.h>
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/hitachi_se.h>
+
+#include "8390.h"
+
+#define byte	unsigned char
+#define half	unsigned short
+#define word	unsigned int
+#define vbyte	volatile unsigned char
+#define vhalf	volatile unsigned short
+#define vword	volatile unsigned int
+
+#define STNIC_RUN	0x01	/* 1 == Run, 0 == reset. */
+
+#define START_PG	0	/* First page of TX buffer */
+#define STOP_PG		128	/* Last page +1 of RX ring */
+
+/* Alias */
+#define STNIC_CR	E8390_CMD
+#define PG0_RSAR0	EN0_RSARLO
+#define PG0_RSAR1	EN0_RSARHI
+#define PG0_RBCR0	EN0_RCNTLO
+#define PG0_RBCR1	EN0_RCNTHI
+
+#define CR_RRD		E8390_RREAD
+#define CR_RWR		E8390_RWRITE
+#define CR_PG0		E8390_PAGE0
+#define CR_STA		E8390_START
+#define CR_RDMA		E8390_NODMA
+
+/* FIXME! YOU MUST SET YOUR OWN ETHER ADDRESS.  */
+static byte stnic_eadr[6] =
+{0x00, 0xc0, 0x6e, 0x00, 0x00, 0x07};
+
+static struct net_device *stnic_dev;
+
+static int stnic_open (struct net_device *dev);
+static int stnic_close (struct net_device *dev);
+static void stnic_reset (struct net_device *dev);
+static void stnic_get_hdr (struct net_device *dev, struct e8390_pkt_hdr *hdr,
+			   int ring_page);
+static void stnic_block_input (struct net_device *dev, int count,
+			       struct sk_buff *skb , int ring_offset);
+static void stnic_block_output (struct net_device *dev, int count,
+				const unsigned char *buf, int start_page);
+
+static void stnic_init (struct net_device *dev);
+
+/* SH7750 specific read/write io. */
+static inline void
+STNIC_DELAY (void)
+{
+  vword trash;
+  trash = *(vword *) 0xa0000000;
+  trash = *(vword *) 0xa0000000;
+}
+
+static inline byte
+STNIC_READ (int reg)
+{
+  byte val;
+
+  val = (*(vhalf *) (PA_83902 + ((reg) << 1)) >> 8) & 0xff;
+  STNIC_DELAY ();
+  return val;
+}
+
+static inline void
+STNIC_WRITE (int reg, byte val)
+{
+  *(vhalf *) (PA_83902 + ((reg) << 1)) = ((half) (val) << 8);
+  STNIC_DELAY ();
+}
+
+int __init stnic_probe(void)
+{
+  struct net_device tmp, *dev = NULL;
+  int i;
+
+  tmp.base_addr = 0x1000;
+  dev = &tmp;
+
+  if (load_8390_module ("stnic.c"))
+    return -ENOSYS;
+
+  /* New style probing API */
+  dev = init_etherdev (0, 0);
+  stnic_dev = dev;
+
+  /* Allocate dev->priv and fill in 8390 specific dev fields. */
+  if (ethdev_init (dev))
+    {
+      printk ("Unable to get memory for dev->priv.\n");
+      return -ENOMEM;
+    }
+
+  for (i = 0; i < ETHER_ADDR_LEN; i++)
+    dev->dev_addr[i] = stnic_eadr[i];
+
+  /* Set the base address to point to the NIC, not the "real" base! */
+  dev->base_addr = 0x1000;
+  dev->irq = IRQ_STNIC;
+  dev->open = &stnic_open;
+  dev->stop = &stnic_close;
+
+  /* Snarf the interrupt now.  There's no point in waiting since we cannot
+     share and the board will usually be enabled. */
+  if (request_irq (dev->irq, ei_interrupt, 0, "DP83902A", dev))
+    {
+      printk (" unable to get IRQ %d.\n", dev->irq);
+      kfree(dev->priv);
+      dev->priv = NULL;
+      return EAGAIN;
+    }
+
+  ei_status.name = "eth0";
+  ei_status.word16 = 1;
+  ei_status.tx_start_page = START_PG;
+  ei_status.rx_start_page = START_PG + TX_PAGES;
+  ei_status.stop_page = STOP_PG;
+
+  ei_status.reset_8390 = &stnic_reset;
+  ei_status.get_8390_hdr = &stnic_get_hdr;
+  ei_status.block_input = &stnic_block_input;
+  ei_status.block_output = &stnic_block_output;
+  stnic_init (dev);
+
+  printk (KERN_INFO "NS ST-NIC 83902A\n");
+
+  return 0;
+}
+
+static int
+stnic_open (struct net_device *dev)
+{
+#if 0
+  printk ("stnic open\n");
+#endif
+  ei_open (dev);
+  MOD_INC_USE_COUNT;
+  return 0;
+}
+
+static int
+stnic_close (struct net_device *dev)
+{
+  ei_close (dev);
+  MOD_DEC_USE_COUNT;
+  return 0;
+}
+
+static void
+stnic_reset (struct net_device *dev)
+{
+  *(vhalf *) PA_83902_RST = 0;
+  udelay (5);
+  if (ei_debug > 1)
+    printk("8390 reset done (%ld).", jiffies);
+  *(vhalf *) PA_83902_RST = ~0;
+  udelay (5);
+}
+
+static void
+stnic_get_hdr (struct net_device *dev, struct e8390_pkt_hdr *hdr,
+	       int ring_page)
+{
+  half buf[2];
+
+  STNIC_WRITE (PG0_RSAR0, 0);
+  STNIC_WRITE (PG0_RSAR1, ring_page);
+  STNIC_WRITE (PG0_RBCR0, 4);
+  STNIC_WRITE (PG0_RBCR1, 0);
+  STNIC_WRITE (STNIC_CR, CR_RRD | CR_PG0 | CR_STA);
+
+  buf[0] = *(vhalf *) PA_83902_IF;
+  STNIC_DELAY ();
+  buf[1] = *(vhalf *) PA_83902_IF;
+  STNIC_DELAY ();
+  hdr->next = buf[0] >> 8;
+  hdr->status = buf[0] & 0xff;
+#ifdef __LITTLE_ENDIAN__
+  hdr->count = buf[1];
+#else
+  hdr->count = ((buf[1] >> 8) & 0xff) | (buf[1] << 8);
+#endif
+
+  if (ei_debug > 1)
+    printk ("ring %x status %02x next %02x count %04x.\n",
+	    ring_page, hdr->status, hdr->next, hdr->count);
+
+  STNIC_WRITE (STNIC_CR, CR_RDMA | CR_PG0 | CR_STA);
+}
+
+/* Block input and output, similar to the Crynwr packet driver. If you are
+   porting to a new ethercard look at the packet driver source for hints.
+   The HP LAN doesn't use shared memory -- we put the packet
+   out through the "remote DMA" dataport. */
+
+static void
+stnic_block_input (struct net_device *dev, int length, struct sk_buff *skb,
+		   int offset)
+{
+  char *buf = skb->data;
+  half val;
+
+  STNIC_WRITE (PG0_RSAR0, offset & 0xff);
+  STNIC_WRITE (PG0_RSAR1, offset >> 8);
+  STNIC_WRITE (PG0_RBCR0, length & 0xff);
+  STNIC_WRITE (PG0_RBCR1, length >> 8);
+  STNIC_WRITE (STNIC_CR, CR_RRD | CR_PG0 | CR_STA);
+
+  if (length & 1)
+    length++;
+
+  while (length > 0)
+    {
+      val = *(vhalf *) PA_83902_IF;
+#ifdef __LITTLE_ENDIAN__
+      *buf++ = val & 0xff;
+      *buf++ = val >> 8;
+#else
+      *buf++ = val >> 8;
+      *buf++ = val & 0xff;
+#endif
+      STNIC_DELAY ();
+      length -= sizeof (half);
+    }
+
+  STNIC_WRITE (STNIC_CR, CR_RDMA | CR_PG0 | CR_STA);
+}
+
+static void
+stnic_block_output (struct net_device *dev, int length,
+		    const unsigned char *buf, int output_page)
+{
+
+  STNIC_WRITE (PG0_RBCR0, 1);
+  STNIC_WRITE (STNIC_CR, CR_RRD | CR_PG0 | CR_STA);
+
+  STNIC_WRITE (PG0_RSAR0, 0);
+  STNIC_WRITE (PG0_RSAR1, output_page);
+  STNIC_WRITE (PG0_RBCR0, length & 0xff);
+  STNIC_WRITE (PG0_RBCR1, length >> 8);
+  STNIC_WRITE (STNIC_CR, CR_RWR | CR_PG0 | CR_STA);
+
+  if (length & 1)
+    length++;
+
+  while (length > 0)
+    {
+#ifdef __LITTLE_ENDIAN__
+      *(vhalf *) PA_83902_IF = ((half) buf[1] << 8) | buf[0];
+#else
+      *(vhalf *) PA_83902_IF = ((half) buf[0] << 8) | buf[1];
+#endif
+      STNIC_DELAY ();
+      buf += sizeof (half);
+      length -= sizeof (half);
+    }
+
+  STNIC_WRITE (STNIC_CR, CR_RDMA | CR_PG0 | CR_STA);
+}
+
+/* This function resets the STNIC if something screws up.  */
+static void
+stnic_init (struct net_device *dev)
+{
+  stnic_reset (dev);
+  NS8390_init (dev, 0);
+  return;
+}
+
+/* Hardware interrupt handler.  */
+extern void ei_interrupt (int irq, void *dev_id, struct pt_regs *regs);
+
+void
+do_stnic_intr (int irq, void *dev_id, struct pt_regs *regs)
+{
+  ei_interrupt (0, stnic_dev, regs);
+}
+
+module_init(stnic_probe);