LXR linux/drivers/input/gameport/fm801-gp.c

   1/*
   2 *  FM801 gameport driver for Linux
   3 *
   4 *  Copyright (c) by Takashi Iwai <tiwai@suse.de>
   5 *
   6 *
   7 *   This program is free software; you can redistribute it and/or modify
   8 *   it under the terms of the GNU General Public License as published by
   9 *   the Free Software Foundation; either version 2 of the License, or
  10 *   (at your option) any later version.
  11 *
  12 *   This program is distributed in the hope that it will be useful,
  13 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 *   GNU General Public License for more details.
  16 *
  17 *   You should have received a copy of the GNU General Public License
  18 *   along with this program; if not, write to the Free Software
  19 *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 *
  21 */
  22
  23#include <asm/io.h>
  24#include <linux/delay.h>
  25#include <linux/errno.h>
  26#include <linux/ioport.h>
  27#include <linux/kernel.h>
  28#include <linux/module.h>
  29#include <linux/pci.h>
  30#include <linux/init.h>
  31#include <linux/slab.h>
  32#include <linux/gameport.h>
  33
  34#define PCI_VENDOR_ID_FORTEMEDIA        0x1319
  35#define PCI_DEVICE_ID_FM801_GP  0x0802
  36
  37#define HAVE_COOKED
  38
  39struct fm801_gp {
  40        struct gameport *gameport;
  41        struct resource *res_port;
  42};
  43
  44#ifdef HAVE_COOKED
  45static int fm801_gp_cooked_read(struct gameport *gameport, int *axes, int *buttons)
  46{
  47        unsigned short w;
  48
  49        w = inw(gameport->io + 2);
  50        *buttons = (~w >> 14) & 0x03;
  51        axes[0] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5);
  52        w = inw(gameport->io + 4);
  53        axes[1] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5);
  54        w = inw(gameport->io + 6);
  55        *buttons |= ((~w >> 14) & 0x03) << 2;
  56        axes[2] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5);
  57        w = inw(gameport->io + 8);
  58        axes[3] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5);
  59        outw(0xff, gameport->io); /* reset */
  60
  61        return 0;
  62}
  63#endif
  64
  65static int fm801_gp_open(struct gameport *gameport, int mode)
  66{
  67        switch (mode) {
  68#ifdef HAVE_COOKED
  69        case GAMEPORT_MODE_COOKED:
  70                return 0;
  71#endif
  72        case GAMEPORT_MODE_RAW:
  73                return 0;
  74        default:
  75                return -1;
  76        }
  77
  78        return 0;
  79}
  80
  81static int __devinit fm801_gp_probe(struct pci_dev *pci, const struct pci_device_id *id)
  82{
  83        struct fm801_gp *gp;
  84        struct gameport *port;
  85        int error;
  86
  87        gp = kzalloc(sizeof(struct fm801_gp), GFP_KERNEL);
  88        port = gameport_allocate_port();
  89        if (!gp || !port) {
  90                printk(KERN_ERR "fm801-gp: Memory allocation failed\n");
  91                error = -ENOMEM;
  92                goto err_out_free;
  93        }
  94
  95        error = pci_enable_device(pci);
  96        if (error)
  97                goto err_out_free;
  98
  99        port->open = fm801_gp_open;
 100#ifdef HAVE_COOKED
 101        port->cooked_read = fm801_gp_cooked_read;
 102#endif
 103        gameport_set_name(port, "FM801");
 104        gameport_set_phys(port, "pci%s/gameport0", pci_name(pci));
 105        port->dev.parent = &pci->dev;
 106        port->io = pci_resource_start(pci, 0);
 107
 108        gp->gameport = port;
 109        gp->res_port = request_region(port->io, 0x10, "FM801 GP");
 110        if (!gp->res_port) {
 111                printk(KERN_DEBUG "fm801-gp: unable to grab region 0x%x-0x%x\n",
 112                        port->io, port->io + 0x0f);
 113                error = -EBUSY;
 114                goto err_out_disable_dev;
 115        }
 116
 117        pci_set_drvdata(pci, gp);
 118
 119        outb(0x60, port->io + 0x0d); /* enable joystick 1 and 2 */
 120        gameport_register_port(port);
 121
 122        return 0;
 123
 124 err_out_disable_dev:
 125        pci_disable_device(pci);
 126 err_out_free:
 127        gameport_free_port(port);
 128        kfree(gp);
 129        return error;
 130}
 131
 132static void __devexit fm801_gp_remove(struct pci_dev *pci)
 133{
 134        struct fm801_gp *gp = pci_get_drvdata(pci);
 135
 136        gameport_unregister_port(gp->gameport);
 137        release_resource(gp->res_port);
 138        kfree(gp);
 139
 140        pci_disable_device(pci);
 141}
 142
 143static const struct pci_device_id fm801_gp_id_table[] = {
 144        { PCI_VENDOR_ID_FORTEMEDIA, PCI_DEVICE_ID_FM801_GP, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0  },
 145        { 0 }
 146};
 147
 148static struct pci_driver fm801_gp_driver = {
 149        .name =         "FM801_gameport",
 150        .id_table =     fm801_gp_id_table,
 151        .probe =        fm801_gp_probe,
 152        .remove =       __devexit_p(fm801_gp_remove),
 153};
 154
 155static int __init fm801_gp_init(void)
 156{
 157        return pci_register_driver(&fm801_gp_driver);
 158}
 159
 160static void __exit fm801_gp_exit(void)
 161{
 162        pci_unregister_driver(&fm801_gp_driver);
 163}
 164
 165module_init(fm801_gp_init);
 166module_exit(fm801_gp_exit);
 167
 168MODULE_DEVICE_TABLE(pci, fm801_gp_id_table);
 169
 170MODULE_DESCRIPTION("FM801 gameport driver");
 171MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
 172MODULE_LICENSE("GPL");
 173