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
  38 struct fm801_gp {
  39         struct gameport *gameport;
  40         struct resource *res_port;
  41 };
  42
  43 #ifdef HAVE_COOKED
  44 static 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
  64 static 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
  80 static 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
 131 static 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
 142 static 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 };
 146 MODULE_DEVICE_TABLE(pci, fm801_gp_id_table);
 147
 148 static 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
 155 module_pci_driver(fm801_gp_driver);
 156
 157 MODULE_DESCRIPTION("FM801 gameport driver");
 158 MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
 159 MODULE_LICENSE("GPL");