stnic.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:8k
- /* 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/config.h>
- #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 <asm/machvec.h>
- #ifdef CONFIG_SH_STANDARD_BIOS
- #include <asm/sh_bios.h>
- #endif
- #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;
- 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 *dev;
- int i;
- /* If we are not running on a SolutionEngine, give up now */
- if (! MACH_SE)
- return -ENODEV;
- /* New style probing API */
- dev = init_etherdev (NULL, 0);
- if (!dev)
- return -ENOMEM;
- SET_MODULE_OWNER(dev);
- stnic_dev = dev;
- /* Allocate dev->priv and fill in 8390 specific dev fields. */
- if (ethdev_init (dev))
- {
- printk (KERN_EMERG "Unable to get memory for dev->priv.n");
- return -ENOMEM;
- }
- #ifdef CONFIG_SH_STANDARD_BIOS
- sh_bios_get_node_addr (stnic_eadr);
- #endif
- 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. */
- i = request_irq (dev->irq, ei_interrupt, 0, dev->name, dev);
- if (i) {
- printk (KERN_EMERG " unable to get IRQ %d.n", dev->irq);
- unregister_netdev(dev);
- kfree(dev->priv);
- kfree(dev);
- return i;
- }
- ei_status.name = dev->name;
- ei_status.word16 = 1;
- #ifdef __LITTLE_ENDIAN__
- ei_status.bigendian = 0;
- #else
- ei_status.bigendian = 1;
- #endif
- 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 83902An");
- return 0;
- }
- static int
- stnic_open (struct net_device *dev)
- {
- #if 0
- printk (KERN_DEBUG "stnic openn");
- #endif
- ei_open (dev);
- return 0;
- }
- static int
- stnic_close (struct net_device *dev)
- {
- ei_close (dev);
- return 0;
- }
- static void
- stnic_reset (struct net_device *dev)
- {
- *(vhalf *) PA_83902_RST = 0;
- udelay (5);
- if (ei_debug > 1)
- printk (KERN_WARNING "8390 reset done (%ld).n", 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 (KERN_DEBUG "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); /* Write non-zero value */
- STNIC_WRITE (STNIC_CR, CR_RRD | CR_PG0 | CR_STA);
- STNIC_DELAY ();
- STNIC_WRITE (PG0_RBCR0, length & 0xff);
- STNIC_WRITE (PG0_RBCR1, length >> 8);
- STNIC_WRITE (PG0_RSAR0, 0);
- STNIC_WRITE (PG0_RSAR1, output_page);
- 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);
- /* No cleanup routine. */
- MODULE_LICENSE("GPL");