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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/net/arcnet/com90io.c | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/net/arcnet/com90io.c')
-rw-r--r-- | drivers/net/arcnet/com90io.c | 426 |
1 files changed, 426 insertions, 0 deletions
diff --git a/drivers/net/arcnet/com90io.c b/drivers/net/arcnet/com90io.c new file mode 100644 index 000000000..37b47749f --- /dev/null +++ b/drivers/net/arcnet/com90io.c @@ -0,0 +1,426 @@ +/* + * 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 + * + * ********************** + */ + +#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/ioport.h> +#include <linux/delay.h> +#include <linux/netdevice.h> +#include <linux/memblock.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/io.h> + +#include "arcdevice.h" +#include "com9026.h" + +/* 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 + +/**************************************************************************** + * * + * 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; + + arcnet_outb(offset >> 8, ioaddr, COM9026_REG_W_ADDR_HI); + arcnet_outb(offset & 0xff, ioaddr, COM9026_REG_W_ADDR_LO); + + return arcnet_inb(ioaddr, COM9026_REG_RW_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; + + arcnet_outb(offset >> 8, ioaddr, COM9026_REG_W_ADDR_HI); + arcnet_outb(offset & 0xff, ioaddr, COM9026_REG_W_ADDR_LO); + + arcnet_outb(datum, ioaddr, COM9026_REG_RW_MEMDATA); +} + +#endif + +static void get_whole_buffer(struct net_device *dev, unsigned offset, + unsigned length, char *dest) +{ + int ioaddr = dev->base_addr; + + arcnet_outb((offset >> 8) | AUTOINCflag, ioaddr, COM9026_REG_W_ADDR_HI); + arcnet_outb(offset & 0xff, ioaddr, COM9026_REG_W_ADDR_LO); + + while (length--) +#ifdef ONE_AT_A_TIME_RX + *(dest++) = get_buffer_byte(dev, offset++); +#else + *(dest++) = arcnet_inb(ioaddr, COM9026_REG_RW_MEMDATA); +#endif +} + +static void put_whole_buffer(struct net_device *dev, unsigned offset, + unsigned length, char *dest) +{ + int ioaddr = dev->base_addr; + + arcnet_outb((offset >> 8) | AUTOINCflag, ioaddr, COM9026_REG_W_ADDR_HI); + arcnet_outb(offset & 0xff, ioaddr,COM9026_REG_W_ADDR_LO); + + while (length--) +#ifdef ONE_AT_A_TIME_TX + put_buffer_byte(dev, offset++, *(dest++)); +#else + arcnet_outb(*(dest++), ioaddr, COM9026_REG_RW_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; + + if (BUGLVL(D_NORMAL)) { + pr_info("%s\n", "COM90xx IO-mapped mode support (by David Woodhouse et el.)"); + pr_info("E-mail me if you actually test this driver, please!\n"); + } + + if (!ioaddr) { + arc_printk(D_NORMAL, dev, "No autoprobe for IO mapped cards; you must specify the base address!\n"); + return -ENODEV; + } + if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "com90io probe")) { + arc_printk(D_INIT_REASONS, dev, "IO request_region %x-%x failed\n", + ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1); + return -ENXIO; + } + if (arcnet_inb(ioaddr, COM9026_REG_R_STATUS) == 0xFF) { + arc_printk(D_INIT_REASONS, dev, "IO address %x empty\n", + ioaddr); + goto err_out; + } + arcnet_inb(ioaddr, COM9026_REG_R_RESET); + mdelay(RESETtime); + + status = arcnet_inb(ioaddr, COM9026_REG_R_STATUS); + + if ((status & 0x9D) != (NORXflag | RECONflag | TXFREEflag | RESETflag)) { + arc_printk(D_INIT_REASONS, dev, "Status invalid (%Xh)\n", + status); + goto err_out; + } + arc_printk(D_INIT_REASONS, dev, "Status after reset: %X\n", status); + + arcnet_outb(CFLAGScmd | RESETclear | CONFIGclear, + ioaddr, COM9026_REG_W_COMMAND); + + arc_printk(D_INIT_REASONS, dev, "Status after reset acknowledged: %X\n", + status); + + status = arcnet_inb(ioaddr, COM9026_REG_R_STATUS); + + if (status & RESETflag) { + arc_printk(D_INIT_REASONS, dev, "Eternal reset (status=%Xh)\n", + status); + goto err_out; + } + arcnet_outb((0x16 | IOMAPflag) & ~ENABLE16flag, + ioaddr, COM9026_REG_RW_CONFIG); + + /* Read first loc'n of memory */ + + arcnet_outb(AUTOINCflag, ioaddr, COM9026_REG_W_ADDR_HI); + arcnet_outb(0, ioaddr, COM9026_REG_W_ADDR_LO); + + status = arcnet_inb(ioaddr, COM9026_REG_RW_MEMDATA); + if (status != 0xd1) { + arc_printk(D_INIT_REASONS, dev, "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(); + arcnet_outb(NORXflag, ioaddr, COM9026_REG_W_INTMASK); + udelay(1); + arcnet_outb(0, ioaddr, COM9026_REG_W_INTMASK); + dev->irq = probe_irq_off(airqmask); + + if ((int)dev->irq <= 0) { + arc_printk(D_INIT_REASONS, dev, "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)) { + arc_printk(D_NORMAL, dev, "Can't get IRQ %d!\n", dev->irq); + return -ENODEV; + } + /* Reserve the I/O region */ + if (!request_region(dev->base_addr, ARCNET_TOTAL_SIZE, + "arcnet (COM90xx-IO)")) { + free_irq(dev->irq, dev); + return -EBUSY; + } + + lp = netdev_priv(dev); + 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; + arcnet_outb(lp->config, ioaddr, COM9026_REG_RW_CONFIG); + + /* get and check the station ID from offset 1 in shmem */ + + arcnet_set_addr(dev, get_buffer_byte(dev, 1)); + + err = register_netdev(dev); + if (err) { + arcnet_outb(arcnet_inb(ioaddr, COM9026_REG_RW_CONFIG) & ~IOMAPflag, + ioaddr, COM9026_REG_RW_CONFIG); + free_irq(dev->irq, dev); + release_region(dev->base_addr, ARCNET_TOTAL_SIZE); + return err; + } + + arc_printk(D_NORMAL, dev, "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 = netdev_priv(dev); + short ioaddr = dev->base_addr; + + arc_printk(D_INIT, dev, "Resetting %s (status=%02Xh)\n", + dev->name, arcnet_inb(ioaddr, COM9026_REG_R_STATUS)); + + if (really_reset) { + /* reset the card */ + arcnet_inb(ioaddr, COM9026_REG_R_RESET); + mdelay(RESETtime); + } + /* Set the thing to IO-mapped, 8-bit mode */ + lp->config = (0x1C | IOMAPflag) & ~ENABLE16flag; + arcnet_outb(lp->config, ioaddr, COM9026_REG_RW_CONFIG); + + arcnet_outb(CFLAGScmd | RESETclear, ioaddr, COM9026_REG_W_COMMAND); + /* clear flags & end reset */ + arcnet_outb(CFLAGScmd | CONFIGclear, ioaddr, COM9026_REG_W_COMMAND); + + /* verify that the ARCnet signature byte is present */ + if (get_buffer_byte(dev, 0) != TESTvalue) { + arc_printk(D_NORMAL, dev, "reset failed: TESTvalue not present.\n"); + return 1; + } + /* enable extended (512-byte) packets */ + arcnet_outb(CONFIGcmd | EXTconf, ioaddr, COM9026_REG_W_COMMAND); + /* done! return success. */ + return 0; +} + +static void com90io_command(struct net_device *dev, int cmd) +{ + short ioaddr = dev->base_addr; + + arcnet_outb(cmd, ioaddr, COM9026_REG_W_COMMAND); +} + +static int com90io_status(struct net_device *dev) +{ + short ioaddr = dev->base_addr; + + return arcnet_inb(ioaddr, COM9026_REG_R_STATUS); +} + +static void com90io_setmask(struct net_device *dev, int mask) +{ + short ioaddr = dev->base_addr; + + arcnet_outb(mask, ioaddr, COM9026_REG_W_INTMASK); +} + +static void com90io_copy_to_card(struct net_device *dev, int bufnum, + int offset, void *buf, int count) +{ + TIME(dev, "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(dev, "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_hw(io, int, ioport, 0); +module_param_hw(irq, int, irq, 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 */ + pr_err("Too many arguments\n"); + fallthrough; + case 2: /* IRQ */ + irq = ints[2]; + fallthrough; + 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; + + dev->base_addr = io; + dev->irq = irq; + if (dev->irq == 2) + dev->irq = 9; + + err = com90io_probe(dev); + + if (err) { + free_arcdev(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); + + /* In case the old driver is loaded later, + * set the thing back to MMAP mode + */ + arcnet_outb(arcnet_inb(ioaddr, COM9026_REG_RW_CONFIG) & ~IOMAPflag, + ioaddr, COM9026_REG_RW_CONFIG); + + free_irq(dev->irq, dev); + release_region(dev->base_addr, ARCNET_TOTAL_SIZE); + free_arcdev(dev); +} + +module_init(com90io_init) +module_exit(com90io_exit) |