diff options
Diffstat (limited to 'drivers/net/ethernet/8390/es3210.c')
| -rw-r--r-- | drivers/net/ethernet/8390/es3210.c | 446 |
1 files changed, 446 insertions, 0 deletions
diff --git a/drivers/net/ethernet/8390/es3210.c b/drivers/net/ethernet/8390/es3210.c new file mode 100644 index 0000000..7a09575 --- /dev/null +++ b/drivers/net/ethernet/8390/es3210.c @@ -0,0 +1,446 @@ +/* + es3210.c + + Linux driver for Racal-Interlan ES3210 EISA Network Adapter + + Copyright (C) 1996, Paul Gortmaker. + + This software may be used and distributed according to the terms + of the GNU General Public License, incorporated herein by reference. + + Information and Code Sources: + + 1) The existing myriad of Linux 8390 drivers written by Donald Becker. + + 2) Once again Russ Nelson's asm packet driver provided additional info. + + 3) Info for getting IRQ and sh-mem gleaned from the EISA cfg files. + Too bad it doesn't work -- see below. + + The ES3210 is an EISA shared memory NS8390 implementation. Note + that all memory copies to/from the board must be 32bit transfers. + Which rules out using eth_io_copy_and_sum() in this driver. + + Apparently there are two slightly different revisions of the + card, since there are two distinct EISA cfg files (!rii0101.cfg + and !rii0102.cfg) One has media select in the cfg file and the + other doesn't. Hopefully this will work with either. + + That is about all I can tell you about it, having never actually + even seen one of these cards. :) Try http://www.interlan.com + if you want more info. + + Thanks go to Mark Salazar for testing v0.02 of this driver. + + Bugs, to-fix, etc: + + 1) The EISA cfg ports that are *supposed* to have the IRQ and shared + mem values just read 0xff all the time. Hrrmpf. Apparently the + same happens with the packet driver as the code for reading + these registers is disabled there. In the meantime, boot with: + ether=<IRQ>,0,0x<shared_mem_addr>,eth0 to override the IRQ and + shared memory detection. (The i/o port detection is okay.) + + 2) Module support currently untested. Probably works though. + +*/ + +static const char version[] = + "es3210.c: Driver revision v0.03, 14/09/96\n"; + +#include <linux/module.h> +#include <linux/eisa.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> + +#include <asm/io.h> +#include <asm/system.h> + +#include "8390.h" + +static int es_probe1(struct net_device *dev, int ioaddr); + +static void es_reset_8390(struct net_device *dev); + +static void es_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page); +static void es_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset); +static void es_block_output(struct net_device *dev, int count, const unsigned char *buf, int start_page); + +#define ES_START_PG 0x00 /* First page of TX buffer */ +#define ES_STOP_PG 0x40 /* Last page +1 of RX ring */ + +#define ES_IO_EXTENT 0x37 /* The cfg file says 0xc90 -> 0xcc7 */ +#define ES_ID_PORT 0xc80 /* Same for all EISA cards */ +#define ES_SA_PROM 0xc90 /* Start of e'net addr. */ +#define ES_RESET_PORT 0xc84 /* From the packet driver source */ +#define ES_NIC_OFFSET 0xca0 /* Hello, the 8390 is *here* */ + +#define ES_ADDR0 0x02 /* 3 byte vendor prefix */ +#define ES_ADDR1 0x07 +#define ES_ADDR2 0x01 + +/* + * Two card revisions. EISA ID's are always rev. minor, rev. major,, and + * then the three vendor letters stored in 5 bits each, with an "a" = 1. + * For eg: "rii" = 10010 01001 01001 = 0x4929, which is how the EISA + * config utility determines automagically what config file(s) to use. + */ +#define ES_EISA_ID1 0x01012949 /* !rii0101.cfg */ +#define ES_EISA_ID2 0x02012949 /* !rii0102.cfg */ + +#define ES_CFG1 0xcc0 /* IOPORT(1) --> IOPORT(6) in cfg file */ +#define ES_CFG2 0xcc1 +#define ES_CFG3 0xcc2 +#define ES_CFG4 0xcc3 +#define ES_CFG5 0xcc4 +#define ES_CFG6 0xc84 /* NB: 0xc84 is also "reset" port. */ + +/* + * You can OR any of the following bits together and assign it + * to ES_DEBUG to get verbose driver info during operation. + * Some of these don't do anything yet. + */ + +#define ES_D_PROBE 0x01 +#define ES_D_RX_PKT 0x02 +#define ES_D_TX_PKT 0x04 +#define ED_D_IRQ 0x08 + +#define ES_DEBUG 0 + +static unsigned char lo_irq_map[] __initdata = {3, 4, 5, 6, 7, 9, 10}; +static unsigned char hi_irq_map[] __initdata = {11, 12, 0, 14, 0, 0, 0, 15}; + +/* + * Probe for the card. The best way is to read the EISA ID if it + * is known. Then we check the prefix of the station address + * PROM for a match against the Racal-Interlan assigned value. + */ + +static int __init do_es_probe(struct net_device *dev) +{ + unsigned short ioaddr = dev->base_addr; + int irq = dev->irq; + int mem_start = dev->mem_start; + + if (ioaddr > 0x1ff) /* Check a single specified location. */ + return es_probe1(dev, ioaddr); + else if (ioaddr > 0) /* Don't probe at all. */ + return -ENXIO; + + if (!EISA_bus) { +#if ES_DEBUG & ES_D_PROBE + printk("es3210.c: Not EISA bus. Not probing high ports.\n"); +#endif + return -ENXIO; + } + + /* EISA spec allows for up to 16 slots, but 8 is typical. */ + for (ioaddr = 0x1000; ioaddr < 0x9000; ioaddr += 0x1000) { + if (es_probe1(dev, ioaddr) == 0) + return 0; + dev->irq = irq; + dev->mem_start = mem_start; + } + + return -ENODEV; +} + +#ifndef MODULE +struct net_device * __init es_probe(int unit) +{ + struct net_device *dev = alloc_ei_netdev(); + int err; + + if (!dev) + return ERR_PTR(-ENOMEM); + + sprintf(dev->name, "eth%d", unit); + netdev_boot_setup_check(dev); + + err = do_es_probe(dev); + if (err) + goto out; + return dev; +out: + free_netdev(dev); + return ERR_PTR(err); +} +#endif + +static int __init es_probe1(struct net_device *dev, int ioaddr) +{ + int i, retval; + unsigned long eisa_id; + + if (!request_region(ioaddr + ES_SA_PROM, ES_IO_EXTENT, "es3210")) + return -ENODEV; + +#if ES_DEBUG & ES_D_PROBE + printk("es3210.c: probe at %#x, ID %#8x\n", ioaddr, inl(ioaddr + ES_ID_PORT)); + printk("es3210.c: config regs: %#x %#x %#x %#x %#x %#x\n", + inb(ioaddr + ES_CFG1), inb(ioaddr + ES_CFG2), inb(ioaddr + ES_CFG3), + inb(ioaddr + ES_CFG4), inb(ioaddr + ES_CFG5), inb(ioaddr + ES_CFG6)); +#endif + +/* Check the EISA ID of the card. */ + eisa_id = inl(ioaddr + ES_ID_PORT); + if ((eisa_id != ES_EISA_ID1) && (eisa_id != ES_EISA_ID2)) { + retval = -ENODEV; + goto out; + } + + for (i = 0; i < ETHER_ADDR_LEN ; i++) + dev->dev_addr[i] = inb(ioaddr + ES_SA_PROM + i); + +/* Check the Racal vendor ID as well. */ + if (dev->dev_addr[0] != ES_ADDR0 || + dev->dev_addr[1] != ES_ADDR1 || + dev->dev_addr[2] != ES_ADDR2) { + printk("es3210.c: card not found %pM (invalid_prefix).\n", + dev->dev_addr); + retval = -ENODEV; + goto out; + } + + printk("es3210.c: ES3210 rev. %ld at %#x, node %pM", + eisa_id>>24, ioaddr, dev->dev_addr); + + /* Snarf the interrupt now. */ + if (dev->irq == 0) { + unsigned char hi_irq = inb(ioaddr + ES_CFG2) & 0x07; + unsigned char lo_irq = inb(ioaddr + ES_CFG1) & 0xfe; + + if (hi_irq != 0) { + dev->irq = hi_irq_map[hi_irq - 1]; + } else { + int i = 0; + while (lo_irq > (1<<i)) i++; + dev->irq = lo_irq_map[i]; + } + printk(" using IRQ %d", dev->irq); +#if ES_DEBUG & ES_D_PROBE + printk("es3210.c: hi_irq %#x, lo_irq %#x, dev->irq = %d\n", + hi_irq, lo_irq, dev->irq); +#endif + } else { + if (dev->irq == 2) + dev->irq = 9; /* Doh! */ + printk(" assigning IRQ %d", dev->irq); + } + + if (request_irq(dev->irq, ei_interrupt, 0, "es3210", dev)) { + printk (" unable to get IRQ %d.\n", dev->irq); + retval = -EAGAIN; + goto out; + } + + if (dev->mem_start == 0) { + unsigned char mem_enabled = inb(ioaddr + ES_CFG2) & 0xc0; + unsigned char mem_bits = inb(ioaddr + ES_CFG3) & 0x07; + + if (mem_enabled != 0x80) { + printk(" shared mem disabled - giving up\n"); + retval = -ENXIO; + goto out1; + } + dev->mem_start = 0xC0000 + mem_bits*0x4000; + printk(" using "); + } else { + printk(" assigning "); + } + + ei_status.mem = ioremap(dev->mem_start, (ES_STOP_PG - ES_START_PG)*256); + if (!ei_status.mem) { + printk("ioremap failed - giving up\n"); + retval = -ENXIO; + goto out1; + } + + dev->mem_end = dev->mem_start + (ES_STOP_PG - ES_START_PG)*256; + + printk("mem %#lx-%#lx\n", dev->mem_start, dev->mem_end-1); + +#if ES_DEBUG & ES_D_PROBE + if (inb(ioaddr + ES_CFG5)) + printk("es3210: Warning - DMA channel enabled, but not used here.\n"); +#endif + /* Note, point at the 8390, and not the card... */ + dev->base_addr = ioaddr + ES_NIC_OFFSET; + + ei_status.name = "ES3210"; + ei_status.tx_start_page = ES_START_PG; + ei_status.rx_start_page = ES_START_PG + TX_PAGES; + ei_status.stop_page = ES_STOP_PG; + ei_status.word16 = 1; + + if (ei_debug > 0) + printk(version); + + ei_status.reset_8390 = &es_reset_8390; + ei_status.block_input = &es_block_input; + ei_status.block_output = &es_block_output; + ei_status.get_8390_hdr = &es_get_8390_hdr; + + dev->netdev_ops = &ei_netdev_ops; + NS8390_init(dev, 0); + + retval = register_netdev(dev); + if (retval) + goto out1; + return 0; +out1: + free_irq(dev->irq, dev); +out: + release_region(ioaddr + ES_SA_PROM, ES_IO_EXTENT); + return retval; +} + +/* + * Reset as per the packet driver method. Judging by the EISA cfg + * file, this just toggles the "Board Enable" bits (bit 2 and 0). + */ + +static void es_reset_8390(struct net_device *dev) +{ + unsigned short ioaddr = dev->base_addr; + unsigned long end; + + outb(0x04, ioaddr + ES_RESET_PORT); + if (ei_debug > 1) printk("%s: resetting the ES3210...", dev->name); + + end = jiffies + 2*HZ/100; + while ((signed)(end - jiffies) > 0) continue; + + ei_status.txing = 0; + outb(0x01, ioaddr + ES_RESET_PORT); + if (ei_debug > 1) printk("reset done\n"); +} + +/* + * Note: In the following three functions is the implicit assumption + * that the associated memcpy will only use "rep; movsl" as long as + * we keep the counts as some multiple of doublewords. This is a + * requirement of the hardware, and also prevents us from using + * eth_io_copy_and_sum() since we can't guarantee it will limit + * itself to doubleword access. + */ + +/* + * Grab the 8390 specific header. Similar to the block_input routine, but + * we don't need to be concerned with ring wrap as the header will be at + * the start of a page, so we optimize accordingly. (A single doubleword.) + */ + +static void +es_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page) +{ + void __iomem *hdr_start = ei_status.mem + ((ring_page - ES_START_PG)<<8); + memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr)); + hdr->count = (hdr->count + 3) & ~3; /* Round up allocation. */ +} + +/* + * Block input and output are easy on shared memory ethercards, the only + * complication is when the ring buffer wraps. The count will already + * be rounded up to a doubleword value via es_get_8390_hdr() above. + */ + +static void es_block_input(struct net_device *dev, int count, struct sk_buff *skb, + int ring_offset) +{ + void __iomem *xfer_start = ei_status.mem + ring_offset - ES_START_PG*256; + + if (ring_offset + count > ES_STOP_PG*256) { + /* Packet wraps over end of ring buffer. */ + int semi_count = ES_STOP_PG*256 - ring_offset; + memcpy_fromio(skb->data, xfer_start, semi_count); + count -= semi_count; + memcpy_fromio(skb->data + semi_count, ei_status.mem, count); + } else { + /* Packet is in one chunk. */ + memcpy_fromio(skb->data, xfer_start, count); + } +} + +static void es_block_output(struct net_device *dev, int count, + const unsigned char *buf, int start_page) +{ + void __iomem *shmem = ei_status.mem + ((start_page - ES_START_PG)<<8); + + count = (count + 3) & ~3; /* Round up to doubleword */ + memcpy_toio(shmem, buf, count); +} + +#ifdef MODULE +#define MAX_ES_CARDS 4 /* Max number of ES3210 cards per module */ +#define NAMELEN 8 /* # of chars for storing dev->name */ +static struct net_device *dev_es3210[MAX_ES_CARDS]; +static int io[MAX_ES_CARDS]; +static int irq[MAX_ES_CARDS]; +static int mem[MAX_ES_CARDS]; + +module_param_array(io, int, NULL, 0); +module_param_array(irq, int, NULL, 0); +module_param_array(mem, int, NULL, 0); +MODULE_PARM_DESC(io, "I/O base address(es)"); +MODULE_PARM_DESC(irq, "IRQ number(s)"); +MODULE_PARM_DESC(mem, "memory base address(es)"); +MODULE_DESCRIPTION("Racal-Interlan ES3210 EISA ethernet driver"); +MODULE_LICENSE("GPL"); + +int __init init_module(void) +{ + struct net_device *dev; + int this_dev, found = 0; + + for (this_dev = 0; this_dev < MAX_ES_CARDS; this_dev++) { + if (io[this_dev] == 0 && this_dev != 0) + break; + dev = alloc_ei_netdev(); + if (!dev) + break; + dev->irq = irq[this_dev]; + dev->base_addr = io[this_dev]; + dev->mem_start = mem[this_dev]; + if (do_es_probe(dev) == 0) { + dev_es3210[found++] = dev; + continue; + } + free_netdev(dev); + printk(KERN_WARNING "es3210.c: No es3210 card found (i/o = 0x%x).\n", io[this_dev]); + break; + } + if (found) + return 0; + return -ENXIO; +} + +static void cleanup_card(struct net_device *dev) +{ + free_irq(dev->irq, dev); + release_region(dev->base_addr, ES_IO_EXTENT); + iounmap(ei_status.mem); +} + +void __exit +cleanup_module(void) +{ + int this_dev; + + for (this_dev = 0; this_dev < MAX_ES_CARDS; this_dev++) { + struct net_device *dev = dev_es3210[this_dev]; + if (dev) { + unregister_netdev(dev); + cleanup_card(dev); + free_netdev(dev); + } + } +} +#endif /* MODULE */ + |
