release/src-rt-6.x.4708/linux/linux-2.6.36/sound/pci/au88x0/au88x0_game.c

   1 /*
   2  *  Manuel Jander.
   3  *
   4  *  Based on the work of:
   5  *  Vojtech Pavlik
   6  *  Raymond Ingles
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  21  *
  22  * Should you need to contact me, the author, you can do so either by
  23  * e-mail - mail your message to <vojtech@suse.cz>, or by paper mail:
  24  * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic
  25  *
  26  * Based 90% on Vojtech Pavlik pcigame driver.
  27  * Merged and modified by Manuel Jander, for the OpenVortex
  28  * driver. (email: mjander@embedded.cl).
  29  */
  30
  31 #include <linux/time.h>
  32 #include <linux/delay.h>
  33 #include <linux/init.h>
  34 #include <sound/core.h>
  35 #include "au88x0.h"
  36 #include <linux/gameport.h>
  37
  38 #if defined(CONFIG_GAMEPORT) || (defined(MODULE) && defined(CONFIG_GAMEPORT_MODULE))
  39
  40 #define VORTEX_GAME_DWAIT       20      /* 20 ms */
  41
  42 static unsigned char vortex_game_read(struct gameport *gameport)
  43 {
  44         vortex_t *vortex = gameport_get_port_data(gameport);
  45         return hwread(vortex->mmio, VORTEX_GAME_LEGACY);
  46 }
  47
  48 static void vortex_game_trigger(struct gameport *gameport)
  49 {
  50         vortex_t *vortex = gameport_get_port_data(gameport);
  51         hwwrite(vortex->mmio, VORTEX_GAME_LEGACY, 0xff);
  52 }
  53
  54 static int
  55 vortex_game_cooked_read(struct gameport *gameport, int *axes, int *buttons)
  56 {
  57         vortex_t *vortex = gameport_get_port_data(gameport);
  58         int i;
  59
  60         *buttons = (~hwread(vortex->mmio, VORTEX_GAME_LEGACY) >> 4) & 0xf;
  61
  62         for (i = 0; i < 4; i++) {
  63                 axes[i] =
  64                     hwread(vortex->mmio, VORTEX_GAME_AXIS + (i * AXIS_SIZE));
  65                 if (axes[i] == AXIS_RANGE)
  66                         axes[i] = -1;
  67         }
  68         return 0;
  69 }
  70
  71 static int vortex_game_open(struct gameport *gameport, int mode)
  72 {
  73         vortex_t *vortex = gameport_get_port_data(gameport);
  74
  75         switch (mode) {
  76         case GAMEPORT_MODE_COOKED:
  77                 hwwrite(vortex->mmio, VORTEX_CTRL2,
  78                         hwread(vortex->mmio,
  79                                VORTEX_CTRL2) | CTRL2_GAME_ADCMODE);
  80                 msleep(VORTEX_GAME_DWAIT);
  81                 return 0;
  82         case GAMEPORT_MODE_RAW:
  83                 hwwrite(vortex->mmio, VORTEX_CTRL2,
  84                         hwread(vortex->mmio,
  85                                VORTEX_CTRL2) & ~CTRL2_GAME_ADCMODE);
  86                 return 0;
  87         default:
  88                 return -1;
  89         }
  90
  91         return 0;
  92 }
  93
  94 static int __devinit vortex_gameport_register(vortex_t * vortex)
  95 {
  96         struct gameport *gp;
  97
  98         vortex->gameport = gp = gameport_allocate_port();
  99         if (!gp) {
 100                 printk(KERN_ERR "vortex: cannot allocate memory for gameport\n");
 101                 return -ENOMEM;
 102         };
 103
 104         gameport_set_name(gp, "AU88x0 Gameport");
 105         gameport_set_phys(gp, "pci%s/gameport0", pci_name(vortex->pci_dev));
 106         gameport_set_dev_parent(gp, &vortex->pci_dev->dev);
 107
 108         gp->read = vortex_game_read;
 109         gp->trigger = vortex_game_trigger;
 110         gp->cooked_read = vortex_game_cooked_read;
 111         gp->open = vortex_game_open;
 112
 113         gameport_set_port_data(gp, vortex);
 114         gp->fuzz = 64;
 115
 116         gameport_register_port(gp);
 117
 118         return 0;
 119 }
 120
 121 static void vortex_gameport_unregister(vortex_t * vortex)
 122 {
 123         if (vortex->gameport) {
 124                 gameport_unregister_port(vortex->gameport);
 125                 vortex->gameport = NULL;
 126         }
 127 }
 128
 129 #else
 130 static inline int vortex_gameport_register(vortex_t * vortex) { return -ENOSYS; }
 131 static inline void vortex_gameport_unregister(vortex_t * vortex) { }
 132 #endif