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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/net/arcnet/com90io.c | |
download | linux-stable-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz linux-stable-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 linux-stable-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/net/arcnet/com90io.c')
-rw-r--r-- | drivers/net/arcnet/com90io.c | 435 |
1 files changed, 435 insertions, 0 deletions
diff --git a/drivers/net/arcnet/com90io.c b/drivers/net/arcnet/com90io.c new file mode 100644 index 000000000000..52c77cbe8c62 --- /dev/null +++ b/drivers/net/arcnet/com90io.c @@ -0,0 +1,435 @@ +/* + * Linux ARCnet driver - COM90xx chipset (IO-mapped buffers) + * + * Written 1997 by David Woodhouse. + * Written 1994-1999 by Avery Pennarun. + * Written 1999-2000 by Martin Mares <mj@ucw.cz>. + * Derived from skeleton.c by Donald Becker. + * + * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com) + * for sponsoring the further development of this driver. + * + * ********************** + * + * The original copyright of skeleton.c was as follows: + * + * skeleton.c Written 1993 by Donald Becker. + * Copyright 1993 United States Government as represented by the + * Director, National Security Agency. This software may only be used + * and distributed according to the terms of the GNU General Public License as + * modified by SRC, incorporated herein by reference. + * + * ********************** + * + * For more details, see drivers/net/arcnet.c + * + * ********************** + */ +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/ioport.h> +#include <linux/slab.h> +#include <linux/delay.h> +#include <linux/netdevice.h> +#include <linux/bootmem.h> +#include <linux/init.h> +#include <asm/io.h> +#include <linux/arcdevice.h> + + +#define VERSION "arcnet: COM90xx IO-mapped mode support (by David Woodhouse et el.)\n" + + +/* Internal function declarations */ + +static int com90io_found(struct net_device *dev); +static void com90io_command(struct net_device *dev, int command); +static int com90io_status(struct net_device *dev); +static void com90io_setmask(struct net_device *dev, int mask); +static int com90io_reset(struct net_device *dev, int really_reset); +static void com90io_copy_to_card(struct net_device *dev, int bufnum, int offset, + void *buf, int count); +static void com90io_copy_from_card(struct net_device *dev, int bufnum, int offset, + void *buf, int count); + + +/* Handy defines for ARCnet specific stuff */ + +/* The number of low I/O ports used by the card. */ +#define ARCNET_TOTAL_SIZE 16 + +/* COM 9026 controller chip --> ARCnet register addresses */ +#define _INTMASK (ioaddr+0) /* writable */ +#define _STATUS (ioaddr+0) /* readable */ +#define _COMMAND (ioaddr+1) /* writable, returns random vals on read (?) */ +#define _RESET (ioaddr+8) /* software reset (on read) */ +#define _MEMDATA (ioaddr+12) /* Data port for IO-mapped memory */ +#define _ADDR_HI (ioaddr+15) /* Control registers for said */ +#define _ADDR_LO (ioaddr+14) +#define _CONFIG (ioaddr+2) /* Configuration register */ + +#undef ASTATUS +#undef ACOMMAND +#undef AINTMASK + +#define ASTATUS() inb(_STATUS) +#define ACOMMAND(cmd) outb((cmd),_COMMAND) +#define AINTMASK(msk) outb((msk),_INTMASK) +#define SETCONF() outb((lp->config),_CONFIG) + + +/**************************************************************************** + * * + * IO-mapped operation routines * + * * + ****************************************************************************/ + +#undef ONE_AT_A_TIME_TX +#undef ONE_AT_A_TIME_RX + +static u_char get_buffer_byte(struct net_device *dev, unsigned offset) +{ + int ioaddr = dev->base_addr; + + outb(offset >> 8, _ADDR_HI); + outb(offset & 0xff, _ADDR_LO); + + return inb(_MEMDATA); +} + +#ifdef ONE_AT_A_TIME_TX +static void put_buffer_byte(struct net_device *dev, unsigned offset, u_char datum) +{ + int ioaddr = dev->base_addr; + + outb(offset >> 8, _ADDR_HI); + outb(offset & 0xff, _ADDR_LO); + + outb(datum, _MEMDATA); +} + +#endif + + +static void get_whole_buffer(struct net_device *dev, unsigned offset, unsigned length, char *dest) +{ + int ioaddr = dev->base_addr; + + outb((offset >> 8) | AUTOINCflag, _ADDR_HI); + outb(offset & 0xff, _ADDR_LO); + + while (length--) +#ifdef ONE_AT_A_TIME_RX + *(dest++) = get_buffer_byte(dev, offset++); +#else + *(dest++) = inb(_MEMDATA); +#endif +} + +static void put_whole_buffer(struct net_device *dev, unsigned offset, unsigned length, char *dest) +{ + int ioaddr = dev->base_addr; + + outb((offset >> 8) | AUTOINCflag, _ADDR_HI); + outb(offset & 0xff, _ADDR_LO); + + while (length--) +#ifdef ONE_AT_A_TIME_TX + put_buffer_byte(dev, offset++, *(dest++)); +#else + outb(*(dest++), _MEMDATA); +#endif +} + +/* + * We cannot probe for an IO mapped card either, although we can check that + * it's where we were told it was, and even autoirq + */ +static int __init com90io_probe(struct net_device *dev) +{ + int ioaddr = dev->base_addr, status; + unsigned long airqmask; + + BUGLVL(D_NORMAL) printk(VERSION); + BUGLVL(D_NORMAL) printk("E-mail me if you actually test this driver, please!\n"); + + if (!ioaddr) { + BUGMSG(D_NORMAL, "No autoprobe for IO mapped cards; you " + "must specify the base address!\n"); + return -ENODEV; + } + if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "com90io probe")) { + BUGMSG(D_INIT_REASONS, "IO check_region %x-%x failed.\n", + ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1); + return -ENXIO; + } + if (ASTATUS() == 0xFF) { + BUGMSG(D_INIT_REASONS, "IO address %x empty\n", ioaddr); + goto err_out; + } + inb(_RESET); + mdelay(RESETtime); + + status = ASTATUS(); + + if ((status & 0x9D) != (NORXflag | RECONflag | TXFREEflag | RESETflag)) { + BUGMSG(D_INIT_REASONS, "Status invalid (%Xh).\n", status); + goto err_out; + } + BUGMSG(D_INIT_REASONS, "Status after reset: %X\n", status); + + ACOMMAND(CFLAGScmd | RESETclear | CONFIGclear); + + BUGMSG(D_INIT_REASONS, "Status after reset acknowledged: %X\n", status); + + status = ASTATUS(); + + if (status & RESETflag) { + BUGMSG(D_INIT_REASONS, "Eternal reset (status=%Xh)\n", status); + goto err_out; + } + outb((0x16 | IOMAPflag) & ~ENABLE16flag, _CONFIG); + + /* Read first loc'n of memory */ + + outb(AUTOINCflag, _ADDR_HI); + outb(0, _ADDR_LO); + + if ((status = inb(_MEMDATA)) != 0xd1) { + BUGMSG(D_INIT_REASONS, "Signature byte not found" + " (%Xh instead).\n", status); + goto err_out; + } + if (!dev->irq) { + /* + * if we do this, we're sure to get an IRQ since the + * card has just reset and the NORXflag is on until + * we tell it to start receiving. + */ + + airqmask = probe_irq_on(); + outb(NORXflag, _INTMASK); + udelay(1); + outb(0, _INTMASK); + dev->irq = probe_irq_off(airqmask); + + if (dev->irq <= 0) { + BUGMSG(D_INIT_REASONS, "Autoprobe IRQ failed\n"); + goto err_out; + } + } + release_region(ioaddr, ARCNET_TOTAL_SIZE); /* end of probing */ + return com90io_found(dev); + +err_out: + release_region(ioaddr, ARCNET_TOTAL_SIZE); + return -ENODEV; +} + + +/* Set up the struct net_device associated with this card. Called after + * probing succeeds. + */ +static int __init com90io_found(struct net_device *dev) +{ + struct arcnet_local *lp; + int ioaddr = dev->base_addr; + int err; + + /* Reserve the irq */ + if (request_irq(dev->irq, &arcnet_interrupt, 0, "arcnet (COM90xx-IO)", dev)) { + BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", dev->irq); + return -ENODEV; + } + /* Reserve the I/O region - guaranteed to work by check_region */ + if (!request_region(dev->base_addr, ARCNET_TOTAL_SIZE, "arcnet (COM90xx-IO)")) { + free_irq(dev->irq, dev); + return -EBUSY; + } + + lp = dev->priv; + lp->card_name = "COM90xx I/O"; + lp->hw.command = com90io_command; + lp->hw.status = com90io_status; + lp->hw.intmask = com90io_setmask; + lp->hw.reset = com90io_reset; + lp->hw.owner = THIS_MODULE; + lp->hw.copy_to_card = com90io_copy_to_card; + lp->hw.copy_from_card = com90io_copy_from_card; + + lp->config = (0x16 | IOMAPflag) & ~ENABLE16flag; + SETCONF(); + + /* get and check the station ID from offset 1 in shmem */ + + dev->dev_addr[0] = get_buffer_byte(dev, 1); + + err = register_netdev(dev); + if (err) { + outb((inb(_CONFIG) & ~IOMAPflag), _CONFIG); + free_irq(dev->irq, dev); + release_region(dev->base_addr, ARCNET_TOTAL_SIZE); + return err; + } + + BUGMSG(D_NORMAL, "COM90IO: station %02Xh found at %03lXh, IRQ %d.\n", + dev->dev_addr[0], dev->base_addr, dev->irq); + + return 0; +} + + +/* + * Do a hardware reset on the card, and set up necessary registers. + * + * This should be called as little as possible, because it disrupts the + * token on the network (causes a RECON) and requires a significant delay. + * + * However, it does make sure the card is in a defined state. + */ +static int com90io_reset(struct net_device *dev, int really_reset) +{ + struct arcnet_local *lp = dev->priv; + short ioaddr = dev->base_addr; + + BUGMSG(D_INIT, "Resetting %s (status=%02Xh)\n", dev->name, ASTATUS()); + + if (really_reset) { + /* reset the card */ + inb(_RESET); + mdelay(RESETtime); + } + /* Set the thing to IO-mapped, 8-bit mode */ + lp->config = (0x1C | IOMAPflag) & ~ENABLE16flag; + SETCONF(); + + ACOMMAND(CFLAGScmd | RESETclear); /* clear flags & end reset */ + ACOMMAND(CFLAGScmd | CONFIGclear); + + /* verify that the ARCnet signature byte is present */ + if (get_buffer_byte(dev, 0) != TESTvalue) { + BUGMSG(D_NORMAL, "reset failed: TESTvalue not present.\n"); + return 1; + } + /* enable extended (512-byte) packets */ + ACOMMAND(CONFIGcmd | EXTconf); + + /* done! return success. */ + return 0; +} + + +static void com90io_command(struct net_device *dev, int cmd) +{ + short ioaddr = dev->base_addr; + + ACOMMAND(cmd); +} + + +static int com90io_status(struct net_device *dev) +{ + short ioaddr = dev->base_addr; + + return ASTATUS(); +} + + +static void com90io_setmask(struct net_device *dev, int mask) +{ + short ioaddr = dev->base_addr; + + AINTMASK(mask); +} + +static void com90io_copy_to_card(struct net_device *dev, int bufnum, int offset, + void *buf, int count) +{ + TIME("put_whole_buffer", count, put_whole_buffer(dev, bufnum * 512 + offset, count, buf)); +} + + +static void com90io_copy_from_card(struct net_device *dev, int bufnum, int offset, + void *buf, int count) +{ + TIME("get_whole_buffer", count, get_whole_buffer(dev, bufnum * 512 + offset, count, buf)); +} + +static int io; /* use the insmod io= irq= shmem= options */ +static int irq; +static char device[9]; /* use eg. device=arc1 to change name */ + +module_param(io, int, 0); +module_param(irq, int, 0); +module_param_string(device, device, sizeof(device), 0); +MODULE_LICENSE("GPL"); + +#ifndef MODULE +static int __init com90io_setup(char *s) +{ + int ints[4]; + s = get_options(s, 4, ints); + if (!ints[0]) + return 0; + switch (ints[0]) { + default: /* ERROR */ + printk("com90io: Too many arguments.\n"); + case 2: /* IRQ */ + irq = ints[2]; + case 1: /* IO address */ + io = ints[1]; + } + if (*s) + snprintf(device, sizeof(device), "%s", s); + return 1; +} +__setup("com90io=", com90io_setup); +#endif + +static struct net_device *my_dev; + +static int __init com90io_init(void) +{ + struct net_device *dev; + int err; + + dev = alloc_arcdev(device); + if (!dev) + return -ENOMEM; + + SET_MODULE_OWNER(dev); + + dev->base_addr = io; + dev->irq = irq; + if (dev->irq == 2) + dev->irq = 9; + + err = com90io_probe(dev); + + if (err) { + free_netdev(dev); + return err; + } + + my_dev = dev; + return 0; +} + +static void __exit com90io_exit(void) +{ + struct net_device *dev = my_dev; + int ioaddr = dev->base_addr; + + unregister_netdev(dev); + + /* Set the thing back to MMAP mode, in case the old driver is loaded later */ + outb((inb(_CONFIG) & ~IOMAPflag), _CONFIG); + + free_irq(dev->irq, dev); + release_region(dev->base_addr, ARCNET_TOTAL_SIZE); + free_netdev(dev); +} + +module_init(com90io_init) +module_exit(com90io_exit) |