linux-bk/drivers/input/gameport/ns558.c
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   1/*
   2 * $Id: ns558.c,v 1.43 2002/01/24 19:23:21 vojtech Exp $
   3 *
   4 *  Copyright (c) 1999-2001 Vojtech Pavlik
   5 *  Copyright (c) 1999 Brian Gerst
   6 */
   7
   8/*
   9 * NS558 based standard IBM game port driver for Linux
  10 */
  11
  12/*
  13 * This program is free software; you can redistribute it and/or modify
  14 * it under the terms of the GNU General Public License as published by
  15 * the Free Software Foundation; either version 2 of the License, or
  16 * (at your option) any later version.
  17 *
  18 * This program is distributed in the hope that it will be useful,
  19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 * GNU General Public License for more details.
  22 *
  23 * You should have received a copy of the GNU General Public License
  24 * along with this program; if not, write to the Free Software
  25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  26 *
  27 * Should you need to contact me, the author, you can do so either by
  28 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  29 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  30 */
  31
  32#include <asm/io.h>
  33
  34#include <linux/module.h>
  35#include <linux/ioport.h>
  36#include <linux/config.h>
  37#include <linux/init.h>
  38#include <linux/delay.h>
  39#include <linux/gameport.h>
  40#include <linux/slab.h>
  41#include <linux/pnp.h>
  42
  43MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  44MODULE_DESCRIPTION("Classic gameport (ISA/PnP) driver");
  45MODULE_LICENSE("GPL");
  46
  47#define NS558_ISA       1
  48#define NS558_PNP       2
  49
  50static int ns558_isa_portlist[] = { 0x201, 0x200, 0x202, 0x203, 0x204, 0x205, 0x207, 0x209,
  51                                    0x20b, 0x20c, 0x20e, 0x20f, 0x211, 0x219, 0x101, 0 };
  52
  53struct ns558 {
  54        int type;
  55        int size;
  56        struct pnp_dev *dev;
  57        struct list_head node;
  58        struct gameport gameport;
  59        char phys[32];
  60        char name[32];
  61};
  62
  63static LIST_HEAD(ns558_list);
  64
  65/*
  66 * ns558_isa_probe() tries to find an isa gameport at the
  67 * specified address, and also checks for mirrors.
  68 * A joystick must be attached for this to work.
  69 */
  70
  71static void ns558_isa_probe(int io)
  72{
  73        int i, j, b;
  74        unsigned char c, u, v;
  75        struct ns558 *port;
  76
  77/*
  78 * No one should be using this address.
  79 */
  80
  81        if (!request_region(io, 1, "ns558-isa"))
  82                return;
  83
  84/*
  85 * We must not be able to write arbitrary values to the port.
  86 * The lower two axis bits must be 1 after a write.
  87 */
  88
  89        c = inb(io);
  90        outb(~c & ~3, io);
  91        if (~(u = v = inb(io)) & 3) {
  92                outb(c, io);
  93                i = 0;
  94                goto out;
  95        }
  96/*
  97 * After a trigger, there must be at least some bits changing.
  98 */
  99
 100        for (i = 0; i < 1000; i++) v &= inb(io);
 101
 102        if (u == v) {
 103                outb(c, io);
 104                i = 0;
 105                goto out;
 106        }
 107        msleep(3);
 108/*
 109 * After some time (4ms) the axes shouldn't change anymore.
 110 */
 111
 112        u = inb(io);
 113        for (i = 0; i < 1000; i++)
 114                if ((u ^ inb(io)) & 0xf) {
 115                        outb(c, io);
 116                        i = 0;
 117                        goto out;
 118                }
 119/*
 120 * And now find the number of mirrors of the port.
 121 */
 122
 123        for (i = 1; i < 5; i++) {
 124
 125                release_region(io & (-1 << (i-1)), (1 << (i-1)));
 126
 127                if (!request_region(io & (-1 << i), (1 << i), "ns558-isa"))     /* Don't disturb anyone */
 128                        break;
 129
 130                outb(0xff, io & (-1 << i));
 131                for (j = b = 0; j < 1000; j++)
 132                        if (inb(io & (-1 << i)) != inb((io & (-1 << i)) + (1 << i) - 1)) b++;
 133                msleep(3);
 134
 135                if (b > 300) {                                  /* We allow 30% difference */
 136                        release_region(io & (-1 << i), (1 << i));
 137                        break;
 138                }
 139        }
 140
 141        i--;
 142
 143        if (i != 4) {
 144                if (!request_region(io & (-1 << i), (1 << i), "ns558-isa"))
 145                        return;
 146        }
 147
 148        if (!(port = kmalloc(sizeof(struct ns558), GFP_KERNEL))) {
 149                printk(KERN_ERR "ns558: Memory allocation failed.\n");
 150                goto out;
 151        }
 152        memset(port, 0, sizeof(struct ns558));
 153
 154        port->type = NS558_ISA;
 155        port->size = (1 << i);
 156        port->gameport.io = io;
 157        port->gameport.phys = port->phys;
 158        port->gameport.name = port->name;
 159        port->gameport.id.bustype = BUS_ISA;
 160
 161        sprintf(port->phys, "isa%04x/gameport0", io & (-1 << i));
 162        sprintf(port->name, "NS558 ISA");
 163
 164        gameport_register_port(&port->gameport);
 165
 166        printk(KERN_INFO "gameport: NS558 ISA at %#x", port->gameport.io);
 167        if (port->size > 1) printk(" size %d", port->size);
 168        printk(" speed %d kHz\n", port->gameport.speed);
 169
 170        list_add(&port->node, &ns558_list);
 171        return;
 172out:
 173        release_region(io & (-1 << i), (1 << i));
 174}
 175
 176#ifdef CONFIG_PNP
 177
 178static struct pnp_device_id pnp_devids[] = {
 179        { .id = "@P@0001", .driver_data = 0 }, /* ALS 100 */
 180        { .id = "@P@0020", .driver_data = 0 }, /* ALS 200 */
 181        { .id = "@P@1001", .driver_data = 0 }, /* ALS 100+ */
 182        { .id = "@P@2001", .driver_data = 0 }, /* ALS 120 */
 183        { .id = "ASB16fd", .driver_data = 0 }, /* AdLib NSC16 */
 184        { .id = "AZT3001", .driver_data = 0 }, /* AZT1008 */
 185        { .id = "CDC0001", .driver_data = 0 }, /* Opl3-SAx */
 186        { .id = "CSC0001", .driver_data = 0 }, /* CS4232 */
 187        { .id = "CSC000f", .driver_data = 0 }, /* CS4236 */
 188        { .id = "CSC0101", .driver_data = 0 }, /* CS4327 */
 189        { .id = "CTL7001", .driver_data = 0 }, /* SB16 */
 190        { .id = "CTL7002", .driver_data = 0 }, /* AWE64 */
 191        { .id = "CTL7005", .driver_data = 0 }, /* Vibra16 */
 192        { .id = "ENS2020", .driver_data = 0 }, /* SoundscapeVIVO */
 193        { .id = "ESS0001", .driver_data = 0 }, /* ES1869 */
 194        { .id = "ESS0005", .driver_data = 0 }, /* ES1878 */
 195        { .id = "ESS6880", .driver_data = 0 }, /* ES688 */
 196        { .id = "IBM0012", .driver_data = 0 }, /* CS4232 */
 197        { .id = "OPT0001", .driver_data = 0 }, /* OPTi Audio16 */
 198        { .id = "YMH0006", .driver_data = 0 }, /* Opl3-SA */
 199        { .id = "YMH0022", .driver_data = 0 }, /* Opl3-SAx */
 200        { .id = "PNPb02f", .driver_data = 0 }, /* Generic */
 201        { .id = "", },
 202};
 203
 204MODULE_DEVICE_TABLE(pnp, pnp_devids);
 205
 206static int ns558_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *did)
 207{
 208        int ioport, iolen;
 209        struct ns558 *port;
 210
 211        if (!pnp_port_valid(dev, 0)) {
 212                printk(KERN_WARNING "ns558: No i/o ports on a gameport? Weird\n");
 213                return -ENODEV;
 214        }
 215
 216        ioport = pnp_port_start(dev,0);
 217        iolen = pnp_port_len(dev,0);
 218
 219        if (!request_region(ioport, iolen, "ns558-pnp"))
 220                return -EBUSY;
 221
 222        if (!(port = kmalloc(sizeof(struct ns558), GFP_KERNEL))) {
 223                printk(KERN_ERR "ns558: Memory allocation failed.\n");
 224                return -ENOMEM;
 225        }
 226        memset(port, 0, sizeof(struct ns558));
 227
 228        port->type = NS558_PNP;
 229        port->size = iolen;
 230        port->dev = dev;
 231
 232        port->gameport.io = ioport;
 233        port->gameport.phys = port->phys;
 234        port->gameport.name = port->name;
 235        port->gameport.id.bustype = BUS_ISAPNP;
 236        port->gameport.id.version = 0x100;
 237
 238        sprintf(port->phys, "pnp%s/gameport0", dev->dev.bus_id);
 239        sprintf(port->name, "%s", "NS558 PnP Gameport");
 240
 241        gameport_register_port(&port->gameport);
 242
 243        printk(KERN_INFO "gameport: NS558 PnP at pnp%s io %#x",
 244                dev->dev.bus_id, port->gameport.io);
 245        if (iolen > 1) printk(" size %d", iolen);
 246        printk(" speed %d kHz\n", port->gameport.speed);
 247
 248        list_add_tail(&port->node, &ns558_list);
 249        return 0;
 250}
 251
 252static struct pnp_driver ns558_pnp_driver = {
 253        .name           = "ns558",
 254        .id_table       = pnp_devids,
 255        .probe          = ns558_pnp_probe,
 256};
 257
 258#else
 259
 260static struct pnp_driver ns558_pnp_driver;
 261
 262#endif
 263
 264int __init ns558_init(void)
 265{
 266        int i = 0;
 267
 268/*
 269 * Probe for ISA ports.
 270 */
 271
 272        while (ns558_isa_portlist[i])
 273                ns558_isa_probe(ns558_isa_portlist[i++]);
 274
 275        pnp_register_driver(&ns558_pnp_driver);
 276        return list_empty(&ns558_list) ? -ENODEV : 0;
 277}
 278
 279void __exit ns558_exit(void)
 280{
 281        struct ns558 *port;
 282
 283        list_for_each_entry(port, &ns558_list, node) {
 284                gameport_unregister_port(&port->gameport);
 285                switch (port->type) {
 286
 287#ifdef CONFIG_PNP
 288                        case NS558_PNP:
 289                                /* fall through */
 290#endif
 291                        case NS558_ISA:
 292                                release_region(port->gameport.io & ~(port->size - 1), port->size);
 293                                kfree(port);
 294                                break;
 295
 296                        default:
 297                                break;
 298                }
 299        }
 300        pnp_unregister_driver(&ns558_pnp_driver);
 301}
 302
 303module_init(ns558_init);
 304module_exit(ns558_exit);
 305
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