sound/pci/au88x0/au88x0_game.c

   1 /*
   2  * $Id: au88x0_game.c,v 1.9 2003/09/22 03:51:28 mjander Exp $
   3  *
   4  *  Manuel Jander.
   5  *
   6  *  Based on the work of:
   7  *  Vojtech Pavlik
   8  *  Raymond Ingles
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  23  *
  24  * Should you need to contact me, the author, you can do so either by
  25  * e-mail - mail your message to <vojtech@suse.cz>, or by paper mail:
  26  * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic
  27  *
  28  * Based 90% on Vojtech Pavlik pcigame driver.
  29  * Merged and modified by Manuel Jander, for the OpenVortex
  30  * driver. (email: mjander@embedded.cl).
  31  */
  32
  33 #include <sound/driver.h>
  34 #include <linux/time.h>
  35 #include <linux/delay.h>
  36 #include <linux/init.h>
  37 #include <sound/core.h>
  38 #include "au88x0.h"
  39 #include <linux/gameport.h>
  40
  41 #if defined(CONFIG_GAMEPORT) || (defined(MODULE) && defined(CONFIG_GAMEPORT_MODULE))
  42
  43 #define VORTEX_GAME_DWAIT       20      /* 20 ms */
  44
  45 static unsigned char vortex_game_read(struct gameport *gameport)
  46 {
  47         vortex_t *vortex = gameport_get_port_data(gameport);
  48         return hwread(vortex->mmio, VORTEX_GAME_LEGACY);
  49 }
  50
  51 static void vortex_game_trigger(struct gameport *gameport)
  52 {
  53         vortex_t *vortex = gameport_get_port_data(gameport);
  54         hwwrite(vortex->mmio, VORTEX_GAME_LEGACY, 0xff);
  55 }
  56
  57 static int
  58 vortex_game_cooked_read(struct gameport *gameport, int *axes, int *buttons)
  59 {
  60         vortex_t *vortex = gameport_get_port_data(gameport);
  61         int i;
  62
  63         *buttons = (~hwread(vortex->mmio, VORTEX_GAME_LEGACY) >> 4) & 0xf;
  64
  65         for (i = 0; i < 4; i++) {
  66                 axes[i] =
  67                     hwread(vortex->mmio, VORTEX_GAME_AXIS + (i * AXIS_SIZE));
  68                 if (axes[i] == AXIS_RANGE)
  69                         axes[i] = -1;
  70         }
  71         return 0;
  72 }
  73
  74 static int vortex_game_open(struct gameport *gameport, int mode)
  75 {
  76         vortex_t *vortex = gameport_get_port_data(gameport);
  77
  78         switch (mode) {
  79         case GAMEPORT_MODE_COOKED:
  80                 hwwrite(vortex->mmio, VORTEX_CTRL2,
  81                         hwread(vortex->mmio,
  82                                VORTEX_CTRL2) | CTRL2_GAME_ADCMODE);
  83                 msleep(VORTEX_GAME_DWAIT);
  84                 return 0;
  85         case GAMEPORT_MODE_RAW:
  86                 hwwrite(vortex->mmio, VORTEX_CTRL2,
  87                         hwread(vortex->mmio,
  88                                VORTEX_CTRL2) & ~CTRL2_GAME_ADCMODE);
  89                 return 0;
  90         default:
  91                 return -1;
  92         }
  93
  94         return 0;
  95 }
  96
  97 static int __devinit vortex_gameport_register(vortex_t * vortex)
  98 {
  99         struct gameport *gp;
 100
 101         vortex->gameport = gp = gameport_allocate_port();
 102         if (!gp) {
 103                 printk(KERN_ERR "vortex: cannot allocate memory for gameport\n");
 104                 return -ENOMEM;
 105         };
 106
 107         gameport_set_name(gp, "AU88x0 Gameport");
 108         gameport_set_phys(gp, "pci%s/gameport0", pci_name(vortex->pci_dev));
 109         gameport_set_dev_parent(gp, &vortex->pci_dev->dev);
 110
 111         gp->read = vortex_game_read;
 112         gp->trigger = vortex_game_trigger;
 113         gp->cooked_read = vortex_game_cooked_read;
 114         gp->open = vortex_game_open;
 115
 116         gameport_set_port_data(gp, vortex);
 117         gp->fuzz = 64;
 118
 119         gameport_register_port(gp);
 120
 121         return 0;
 122 }
 123
 124 static void vortex_gameport_unregister(vortex_t * vortex)
 125 {
 126         if (vortex->gameport) {
 127                 gameport_unregister_port(vortex->gameport);
 128                 vortex->gameport = NULL;
 129         }
 130 }
 131
 132 #else
 133 static inline int vortex_gameport_register(vortex_t * vortex) { return -ENOSYS; }
 134 static inline void vortex_gameport_unregister(vortex_t * vortex) { }
 135 #endif