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
  39 struct fm801_gp {
  40         struct gameport *gameport;
  41         struct resource *res_port;
  42 };
  43
  44 #ifdef HAVE_COOKED
  45 static 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
  65 static 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
  81 static int 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
 132 static void 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
 143 static 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 MODULE_DEVICE_TABLE(pci, fm801_gp_id_table);
 148
 149 static struct pci_driver fm801_gp_driver = {
 150         .name =         "FM801_gameport",
 151         .id_table =     fm801_gp_id_table,
 152         .probe =        fm801_gp_probe,
 153         .remove =       fm801_gp_remove,
 154 };
 155
 156 module_pci_driver(fm801_gp_driver);
 157
 158 MODULE_DESCRIPTION("FM801 gameport driver");
 159 MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
 160 MODULE_LICENSE("GPL");