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/slab.h>
  31#include <linux/gameport.h>
  32
  33#define PCI_VENDOR_ID_FORTEMEDIA        0x1319
  34#define PCI_DEVICE_ID_FM801_GP  0x0802
  35
  36#define HAVE_COOKED
  37
  38struct fm801_gp {
  39        struct gameport *gameport;
  40        struct resource *res_port;
  41};
  42
  43#ifdef HAVE_COOKED
  44static int fm801_gp_cooked_read(struct gameport *gameport, int *axes, int *buttons)
  45{
  46        unsigned short w;
  47
  48        w = inw(gameport->io + 2);
  49        *buttons = (~w >> 14) & 0x03;
  50        axes[0] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5);
  51        w = inw(gameport->io + 4);
  52        axes[1] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5);
  53        w = inw(gameport->io + 6);
  54        *buttons |= ((~w >> 14) & 0x03) << 2;
  55        axes[2] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5);
  56        w = inw(gameport->io + 8);
  57        axes[3] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5);
  58        outw(0xff, gameport->io); /* reset */
  59
  60        return 0;
  61}
  62#endif
  63
  64static int fm801_gp_open(struct gameport *gameport, int mode)
  65{
  66        switch (mode) {
  67#ifdef HAVE_COOKED
  68        case GAMEPORT_MODE_COOKED:
  69                return 0;
  70#endif
  71        case GAMEPORT_MODE_RAW:
  72                return 0;
  73        default:
  74                return -1;
  75        }
  76
  77        return 0;
  78}
  79
  80static int fm801_gp_probe(struct pci_dev *pci, const struct pci_device_id *id)
  81{
  82        struct fm801_gp *gp;
  83        struct gameport *port;
  84        int error;
  85
  86        gp = kzalloc(sizeof(struct fm801_gp), GFP_KERNEL);
  87        port = gameport_allocate_port();
  88        if (!gp || !port) {
  89                printk(KERN_ERR "fm801-gp: Memory allocation failed\n");
  90                error = -ENOMEM;
  91                goto err_out_free;
  92        }
  93
  94        error = pci_enable_device(pci);
  95        if (error)
  96                goto err_out_free;
  97
  98        port->open = fm801_gp_open;
  99#ifdef HAVE_COOKED
 100        port->cooked_read = fm801_gp_cooked_read;
 101#endif
 102        gameport_set_name(port, "FM801");
 103        gameport_set_phys(port, "pci%s/gameport0", pci_name(pci));
 104        port->dev.parent = &pci->dev;
 105        port->io = pci_resource_start(pci, 0);
 106
 107        gp->gameport = port;
 108        gp->res_port = request_region(port->io, 0x10, "FM801 GP");
 109        if (!gp->res_port) {
 110                printk(KERN_DEBUG "fm801-gp: unable to grab region 0x%x-0x%x\n",
 111                        port->io, port->io + 0x0f);
 112                error = -EBUSY;
 113                goto err_out_disable_dev;
 114        }
 115
 116        pci_set_drvdata(pci, gp);
 117
 118        outb(0x60, port->io + 0x0d); /* enable joystick 1 and 2 */
 119        gameport_register_port(port);
 120
 121        return 0;
 122
 123 err_out_disable_dev:
 124        pci_disable_device(pci);
 125 err_out_free:
 126        gameport_free_port(port);
 127        kfree(gp);
 128        return error;
 129}
 130
 131static void fm801_gp_remove(struct pci_dev *pci)
 132{
 133        struct fm801_gp *gp = pci_get_drvdata(pci);
 134
 135        gameport_unregister_port(gp->gameport);
 136        release_resource(gp->res_port);
 137        kfree(gp);
 138
 139        pci_disable_device(pci);
 140}
 141
 142static const struct pci_device_id fm801_gp_id_table[] = {
 143        { PCI_VENDOR_ID_FORTEMEDIA, PCI_DEVICE_ID_FM801_GP, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0  },
 144        { 0 }
 145};
 146MODULE_DEVICE_TABLE(pci, fm801_gp_id_table);
 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 =       fm801_gp_remove,
 153};
 154
 155module_pci_driver(fm801_gp_driver);
 156
 157MODULE_DESCRIPTION("FM801 gameport driver");
 158MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
 159MODULE_LICENSE("GPL");
 160