diff options
Diffstat (limited to 'drivers/net/ethernet/8390/stnic.c')
| -rw-r--r-- | drivers/net/ethernet/8390/stnic.c | 294 |
1 files changed, 294 insertions, 0 deletions
diff --git a/drivers/net/ethernet/8390/stnic.c b/drivers/net/ethernet/8390/stnic.c new file mode 100644 index 000000000000..d85f0a84bc7b --- /dev/null +++ b/drivers/net/ethernet/8390/stnic.c @@ -0,0 +1,294 @@ +/* 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/errno.h> +#include <linux/interrupt.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 <mach-se/mach/se.h> +#include <asm/machvec.h> +#ifdef CONFIG_SH_STANDARD_BIOS +#include <asm/sh_bios.h> +#endif + +#include "8390.h" + +#define DRV_NAME "stnic" + +#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 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 (); +} + +static int __init stnic_probe(void) +{ + struct net_device *dev; + int i, err; + + /* If we are not running on a SolutionEngine, give up now */ + if (! MACH_SE) + return -ENODEV; + + /* New style probing API */ + dev = alloc_ei_netdev(); + if (!dev) + 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->netdev_ops = &ei_netdev_ops; + + /* Snarf the interrupt now. There's no point in waiting since we cannot + share and the board will usually be enabled. */ + err = request_irq (dev->irq, ei_interrupt, 0, DRV_NAME, dev); + if (err) { + printk (KERN_EMERG " unable to get IRQ %d.\n", dev->irq); + free_netdev(dev); + return err; + } + + 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); + + err = register_netdev(dev); + if (err) { + free_irq(dev->irq, dev); + free_netdev(dev); + return err; + } + stnic_dev = dev; + + printk (KERN_INFO "NS ST-NIC 83902A\n"); + + 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); +} + +static void __exit stnic_cleanup(void) +{ + unregister_netdev(stnic_dev); + free_irq(stnic_dev->irq, stnic_dev); + free_netdev(stnic_dev); +} + +module_init(stnic_probe); +module_exit(stnic_cleanup); +MODULE_LICENSE("GPL"); |