diff options
author | Thomas Bushnell <thomas@gnu.org> | 1999-04-26 05:58:44 +0000 |
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committer | Thomas Bushnell <thomas@gnu.org> | 1999-04-26 05:58:44 +0000 |
commit | 86297c41a26f18d924e64fc93321c59cbc4c48dd (patch) | |
tree | 376954c6b95b735d361875319a1a2a9db6a27527 /linux/src/drivers/net/e2100.c | |
parent | 851137902d3e7ad87af177487df3eea53e940a1c (diff) |
1998-11-30 OKUJI Yoshinori <okuji@kuicr.kyoto-u.ac.jp>
Clean up linux emulation code to make it architecture-independent
as much as possible.
* linux: Renamed from linuxdev.
* Makefile.in (objfiles): Add linux.o instead of linuxdev.o.
(MAKE): New variable. Used for the linux.o target.
* configure.in: Add AC_CHECK_TOOL(MAKE, make).
* i386/i386/spl.h: Include <i386/ipl.h>, for compatibility with
OSF Mach 3.0. Suggested by Elgin Lee <ehl@funghi.com>.
* linux/src: Renamed from linux/linux.
* linux/dev: Renamed from linux/mach.
* linux/Drivers.in (AC_INIT): Use dev/include/linux/autoconf.h,
instead of mach/include/linux/autoconf.h.
* Makefile.in (all): Target ../linux.o instead of ../linuxdev.o.
* linux/dev/drivers/block/genhd.c: Include <machine/spl.h> instead
of <i386/ipl.h>.
* linux/dev/drivers/net/auto_irq.c: Remove unneeded header files,
<i386/ipl.h> and <i386/pic.h>.
* linux/dev/init/main.c: Many i386-dependent codes moved to ...
* linux/dev/arch/i386/irq.c: ... here.
* linux/dev/arch/i386/setup.c: New file.
* linux/dev/arch/i386/linux_emul.h: Likewise.
* linux/dev/arch/i386/glue/timer.c: Merged into sched.c.
* linux/dev/arch/i386/glue/sched.c: Include <machine/spl.h> instead
of <i386/ipl.h>, and moved to ...
* linux/dev/kernel/sched.c: ... here.
* linux/dev/arch/i386/glue/block.c: Include <machine/spl.h> and
<linux_emul.h>, instead of i386-dependent header files, and
moved to ...
* linux/dev/glue/blocl.c: ... here.
* linux/dev/arch/i386/glue/net.c: Include <machine/spl.h> and
<linux_emul.h>, instead of i386-dependent header files, and
moved to ...
* linux/dev/glue/net.c: ... here.
* linux/dev/arch/i386/glue/misc.c: Remove `x86' and moved to ...
* linux/dev/glue/misc.c: ... here.
* linux/dev/arch/i386/glue/kmem.c: Moved to ...
* linux/dev/glue/kmem.c: ... here.
Diffstat (limited to 'linux/src/drivers/net/e2100.c')
-rw-r--r-- | linux/src/drivers/net/e2100.c | 456 |
1 files changed, 456 insertions, 0 deletions
diff --git a/linux/src/drivers/net/e2100.c b/linux/src/drivers/net/e2100.c new file mode 100644 index 0000000..7ba12d3 --- /dev/null +++ b/linux/src/drivers/net/e2100.c @@ -0,0 +1,456 @@ +/* e2100.c: A Cabletron E2100 series ethernet driver for linux. */ +/* + Written 1993-1994 by Donald Becker. + + Copyright 1994 by Donald Becker. + Copyright 1993 United States Government as represented by the + Director, National Security Agency. This software may be used and + distributed according to the terms of the GNU Public License, + incorporated herein by reference. + + This is a driver for the Cabletron E2100 series ethercards. + + The Author may be reached as becker@cesdis.gsfc.nasa.gov, or + C/O Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771 + + The E2100 series ethercard is a fairly generic shared memory 8390 + implementation. The only unusual aspect is the way the shared memory + registers are set: first you do an inb() in what is normally the + station address region, and the low three bits of next outb() *address* + is used as the write value for that register. Either someone wasn't + too used to dem bit en bites, or they were trying to obfuscate the + programming interface. + + There is an additional complication when setting the window on the packet + buffer. You must first do a read into the packet buffer region with the + low 8 address bits the address setting the page for the start of the packet + buffer window, and then do the above operation. See mem_on() for details. + + One bug on the chip is that even a hard reset won't disable the memory + window, usually resulting in a hung machine if mem_off() isn't called. + If this happens, you must power down the machine for about 30 seconds. +*/ + +static const char *version = + "e2100.c:v1.01 7/21/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n"; + +#include <linux/module.h> + +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/ioport.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> + +#include <asm/io.h> +#include <asm/system.h> + +#include "8390.h" + +static int e21_probe_list[] = {0x300, 0x280, 0x380, 0x220, 0}; + +/* Offsets from the base_addr. + Read from the ASIC register, and the low three bits of the next outb() + address is used to set the corresponding register. */ +#define E21_NIC_OFFSET 0 /* Offset to the 8390 NIC. */ +#define E21_ASIC 0x10 +#define E21_MEM_ENABLE 0x10 +#define E21_MEM_ON 0x05 /* Enable memory in 16 bit mode. */ +#define E21_MEM_ON_8 0x07 /* Enable memory in 8 bit mode. */ +#define E21_MEM_BASE 0x11 +#define E21_IRQ_LOW 0x12 /* The low three bits of the IRQ number. */ +#define E21_IRQ_HIGH 0x14 /* The high IRQ bit and media select ... */ +#define E21_MEDIA 0x14 /* (alias). */ +#define E21_ALT_IFPORT 0x02 /* Set to use the other (BNC,AUI) port. */ +#define E21_BIG_MEM 0x04 /* Use a bigger (64K) buffer (we don't) */ +#define E21_SAPROM 0x10 /* Offset to station address data. */ +#define E21_IO_EXTENT 0x20 + +extern inline void mem_on(short port, volatile char *mem_base, + unsigned char start_page ) +{ + /* This is a little weird: set the shared memory window by doing a + read. The low address bits specify the starting page. */ + mem_base[start_page]; + inb(port + E21_MEM_ENABLE); + outb(E21_MEM_ON, port + E21_MEM_ENABLE + E21_MEM_ON); +} + +extern inline void mem_off(short port) +{ + inb(port + E21_MEM_ENABLE); + outb(0x00, port + E21_MEM_ENABLE); +} + +/* In other drivers I put the TX pages first, but the E2100 window circuitry + is designed to have a 4K Tx region last. The windowing circuitry wraps the + window at 0x2fff->0x0000 so that the packets at e.g. 0x2f00 in the RX ring + appear contiguously in the window. */ +#define E21_RX_START_PG 0x00 /* First page of RX buffer */ +#define E21_RX_STOP_PG 0x30 /* Last page +1 of RX ring */ +#define E21_BIG_RX_STOP_PG 0xF0 /* Last page +1 of RX ring */ +#define E21_TX_START_PG E21_RX_STOP_PG /* First page of TX buffer */ + +int e2100_probe(struct device *dev); +int e21_probe1(struct device *dev, int ioaddr); + +static int e21_open(struct device *dev); +static void e21_reset_8390(struct device *dev); +static void e21_block_input(struct device *dev, int count, + struct sk_buff *skb, int ring_offset); +static void e21_block_output(struct device *dev, int count, + const unsigned char *buf, const int start_page); +static void e21_get_8390_hdr(struct device *dev, struct e8390_pkt_hdr *hdr, + int ring_page); + +static int e21_close(struct device *dev); + + +/* Probe for the E2100 series ethercards. These cards have an 8390 at the + base address and the station address at both offset 0x10 and 0x18. I read + the station address from offset 0x18 to avoid the dataport of NE2000 + ethercards, and look for Ctron's unique ID (first three octets of the + station address). + */ + +int e2100_probe(struct device *dev) +{ + int *port; + int base_addr = dev->base_addr; + + if (base_addr > 0x1ff) /* Check a single specified location. */ + return e21_probe1(dev, base_addr); + else if (base_addr != 0) /* Don't probe at all. */ + return ENXIO; + + for (port = e21_probe_list; *port; port++) { + if (check_region(*port, E21_IO_EXTENT)) + continue; + if (e21_probe1(dev, *port) == 0) + return 0; + } + + return ENODEV; +} + +int e21_probe1(struct device *dev, int ioaddr) +{ + int i, status; + unsigned char *station_addr = dev->dev_addr; + static unsigned version_printed = 0; + + /* First check the station address for the Ctron prefix. */ + if (inb(ioaddr + E21_SAPROM + 0) != 0x00 + || inb(ioaddr + E21_SAPROM + 1) != 0x00 + || inb(ioaddr + E21_SAPROM + 2) != 0x1d) + return ENODEV; + + /* Verify by making certain that there is a 8390 at there. */ + outb(E8390_NODMA + E8390_STOP, ioaddr); + SLOW_DOWN_IO; + status = inb(ioaddr); + if (status != 0x21 && status != 0x23) + return ENODEV; + + /* Read the station address PROM. */ + for (i = 0; i < 6; i++) + station_addr[i] = inb(ioaddr + E21_SAPROM + i); + + inb(ioaddr + E21_MEDIA); /* Point to media selection. */ + outb(0, ioaddr + E21_ASIC); /* and disable the secondary interface. */ + + if (ei_debug && version_printed++ == 0) + printk(version); + + /* We should have a "dev" from Space.c or the static module table. */ + if (dev == NULL) { + printk("e2100.c: Passed a NULL device.\n"); + dev = init_etherdev(0, 0); + } + + printk("%s: E21** at %#3x,", dev->name, ioaddr); + for (i = 0; i < 6; i++) + printk(" %02X", station_addr[i]); + + if (dev->irq < 2) { + int irqlist[] = {15,11,10,12,5,9,3,4}, i; + for (i = 0; i < 8; i++) + if (request_irq (irqlist[i], NULL, 0, "bogus", NULL) != -EBUSY) { + dev->irq = irqlist[i]; + break; + } + if (i >= 8) { + printk(" unable to get IRQ %d.\n", dev->irq); + return EAGAIN; + } + } else if (dev->irq == 2) /* Fixup luser bogosity: IRQ2 is really IRQ9 */ + dev->irq = 9; + + /* 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; + } + + /* Grab the region so we can find a different board if IRQ select fails. */ + request_region(ioaddr, E21_IO_EXTENT, "e2100"); + + /* The 8390 is at the base address. */ + dev->base_addr = ioaddr; + + ei_status.name = "E2100"; + ei_status.word16 = 1; + ei_status.tx_start_page = E21_TX_START_PG; + ei_status.rx_start_page = E21_RX_START_PG; + ei_status.stop_page = E21_RX_STOP_PG; + ei_status.saved_irq = dev->irq; + + /* Check the media port used. The port can be passed in on the + low mem_end bits. */ + if (dev->mem_end & 15) + dev->if_port = dev->mem_end & 7; + else { + dev->if_port = 0; + inb(ioaddr + E21_MEDIA); /* Turn automatic media detection on. */ + for(i = 0; i < 6; i++) + if (station_addr[i] != inb(ioaddr + E21_SAPROM + 8 + i)) { + dev->if_port = 1; + break; + } + } + + /* Never map in the E21 shared memory unless you are actively using it. + Also, the shared memory has effective only one setting -- spread all + over the 128K region! */ + if (dev->mem_start == 0) + dev->mem_start = 0xd0000; + +#ifdef notdef + /* These values are unused. The E2100 has a 2K window into the packet + buffer. The window can be set to start on any page boundary. */ + dev->rmem_start = dev->mem_start + TX_PAGES*256; + dev->mem_end = dev->rmem_end = dev->mem_start + 2*1024; +#endif + + printk(", IRQ %d, %s media, memory @ %#lx.\n", dev->irq, + dev->if_port ? "secondary" : "primary", dev->mem_start); + + ei_status.reset_8390 = &e21_reset_8390; + ei_status.block_input = &e21_block_input; + ei_status.block_output = &e21_block_output; + ei_status.get_8390_hdr = &e21_get_8390_hdr; + dev->open = &e21_open; + dev->stop = &e21_close; + NS8390_init(dev, 0); + + return 0; +} + +static int +e21_open(struct device *dev) +{ + short ioaddr = dev->base_addr; + + if (request_irq(dev->irq, ei_interrupt, 0, "e2100", NULL)) { + return EBUSY; + } + irq2dev_map[dev->irq] = dev; + + /* Set the interrupt line and memory base on the hardware. */ + inb(ioaddr + E21_IRQ_LOW); + outb(0, ioaddr + E21_ASIC + (dev->irq & 7)); + inb(ioaddr + E21_IRQ_HIGH); /* High IRQ bit, and if_port. */ + outb(0, ioaddr + E21_ASIC + (dev->irq > 7 ? 1:0) + + (dev->if_port ? E21_ALT_IFPORT : 0)); + inb(ioaddr + E21_MEM_BASE); + outb(0, ioaddr + E21_ASIC + ((dev->mem_start >> 17) & 7)); + + ei_open(dev); + MOD_INC_USE_COUNT; + return 0; +} + +static void +e21_reset_8390(struct device *dev) +{ + short ioaddr = dev->base_addr; + + outb(0x01, ioaddr); + if (ei_debug > 1) printk("resetting the E2180x3 t=%ld...", jiffies); + ei_status.txing = 0; + + /* Set up the ASIC registers, just in case something changed them. */ + + if (ei_debug > 1) printk("reset done\n"); + return; +} + +/* Grab the 8390 specific header. We put the 2k window so the header page + appears at the start of the shared memory. */ + +static void +e21_get_8390_hdr(struct device *dev, struct e8390_pkt_hdr *hdr, int ring_page) +{ + + short ioaddr = dev->base_addr; + char *shared_mem = (char *)dev->mem_start; + + mem_on(ioaddr, shared_mem, ring_page); + +#ifdef notdef + /* Officially this is what we are doing, but the readl() is faster */ + memcpy_fromio(hdr, shared_mem, sizeof(struct e8390_pkt_hdr)); +#else + ((unsigned int*)hdr)[0] = readl(shared_mem); +#endif + + /* Turn off memory access: we would need to reprogram the window anyway. */ + mem_off(ioaddr); + +} + +/* Block input and output are easy on shared memory ethercards. + The E21xx makes block_input() especially easy by wrapping the top + ring buffer to the bottom automatically. */ +static void +e21_block_input(struct device *dev, int count, struct sk_buff *skb, int ring_offset) +{ + short ioaddr = dev->base_addr; + char *shared_mem = (char *)dev->mem_start; + + mem_on(ioaddr, shared_mem, (ring_offset>>8)); + + /* Packet is always in one chunk -- we can copy + cksum. */ + eth_io_copy_and_sum(skb, dev->mem_start + (ring_offset & 0xff), count, 0); + + mem_off(ioaddr); +} + +static void +e21_block_output(struct device *dev, int count, const unsigned char *buf, + const int start_page) +{ + short ioaddr = dev->base_addr; + volatile char *shared_mem = (char *)dev->mem_start; + + /* Set the shared memory window start by doing a read, with the low address + bits specifying the starting page. */ + readb(shared_mem + start_page); + mem_on(ioaddr, shared_mem, start_page); + + memcpy_toio(shared_mem, buf, count); + mem_off(ioaddr); +} + +static int +e21_close(struct device *dev) +{ + short ioaddr = dev->base_addr; + + if (ei_debug > 1) + printk("%s: Shutting down ethercard.\n", dev->name); + + free_irq(dev->irq, NULL); + dev->irq = ei_status.saved_irq; + + /* Shut off the interrupt line and secondary interface. */ + inb(ioaddr + E21_IRQ_LOW); + outb(0, ioaddr + E21_ASIC); + inb(ioaddr + E21_IRQ_HIGH); /* High IRQ bit, and if_port. */ + outb(0, ioaddr + E21_ASIC); + + irq2dev_map[dev->irq] = NULL; + + ei_close(dev); + + /* Double-check that the memory has been turned off, because really + really bad things happen if it isn't. */ + mem_off(ioaddr); + + MOD_DEC_USE_COUNT; + + return 0; +} + +#ifdef HAVE_DEVLIST +struct netdev_entry e21_drv = +{"e21", e21_probe1, E21_IO_EXTENT, e21_probe_list}; +#endif + + +#ifdef MODULE +#define MAX_E21_CARDS 4 /* Max number of E21 cards per module */ +#define NAMELEN 8 /* # of chars for storing dev->name */ +static char namelist[NAMELEN * MAX_E21_CARDS] = { 0, }; +static struct device dev_e21[MAX_E21_CARDS] = { + { + NULL, /* assign a chunk of namelist[] below */ + 0, 0, 0, 0, + 0, 0, + 0, 0, 0, NULL, NULL + }, +}; + +static int io[MAX_E21_CARDS] = { 0, }; +static int irq[MAX_E21_CARDS] = { 0, }; +static int mem[MAX_E21_CARDS] = { 0, }; +static int xcvr[MAX_E21_CARDS] = { 0, }; /* choose int. or ext. xcvr */ + +/* This is set up so that only a single autoprobe takes place per call. +ISA device autoprobes on a running machine are not recommended. */ +int +init_module(void) +{ + int this_dev, found = 0; + + for (this_dev = 0; this_dev < MAX_E21_CARDS; this_dev++) { + struct device *dev = &dev_e21[this_dev]; + dev->name = namelist+(NAMELEN*this_dev); + dev->irq = irq[this_dev]; + dev->base_addr = io[this_dev]; + dev->mem_start = mem[this_dev]; + dev->mem_end = xcvr[this_dev]; /* low 4bits = xcvr sel. */ + dev->init = e2100_probe; + if (io[this_dev] == 0) { + if (this_dev != 0) break; /* only autoprobe 1st one */ + printk(KERN_NOTICE "e2100.c: Presently autoprobing (not recommended) for a single card.\n"); + } + if (register_netdev(dev) != 0) { + printk(KERN_WARNING "e2100.c: No E2100 card found (i/o = 0x%x).\n", io[this_dev]); + if (found != 0) return 0; /* Got at least one. */ + return -ENXIO; + } + found++; + } + + return 0; +} + +void +cleanup_module(void) +{ + int this_dev; + + for (this_dev = 0; this_dev < MAX_E21_CARDS; this_dev++) { + struct device *dev = &dev_e21[this_dev]; + if (dev->priv != NULL) { + /* NB: e21_close() handles free_irq + irq2dev map */ + kfree(dev->priv); + dev->priv = NULL; + release_region(dev->base_addr, E21_IO_EXTENT); + unregister_netdev(dev); + } + } +} +#endif /* MODULE */ + +/* + * Local variables: + * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c e2100.c" + * version-control: t + * tab-width: 4 + * kept-new-versions: 5 + * End: + */ |