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 <linux/time.h>
  34 #include <linux/delay.h>
  35 #include <linux/init.h>
  36 #include <sound/core.h>
  37 #include "au88x0.h"
  38 #include <linux/gameport.h>
  39
  40 #if defined(CONFIG_GAMEPORT) || (defined(MODULE) && defined(CONFIG_GAMEPORT_MODULE))
  41
  42 #define VORTEX_GAME_DWAIT       20      /* 20 ms */
  43
  44 static unsigned char vortex_game_read(struct gameport *gameport)
  45 {
  46         vortex_t *vortex = gameport_get_port_data(gameport);
  47         return hwread(vortex->mmio, VORTEX_GAME_LEGACY);
  48 }
  49
  50 static void vortex_game_trigger(struct gameport *gameport)
  51 {
  52         vortex_t *vortex = gameport_get_port_data(gameport);
  53         hwwrite(vortex->mmio, VORTEX_GAME_LEGACY, 0xff);
  54 }
  55
  56 static int
  57 vortex_game_cooked_read(struct gameport *gameport, int *axes, int *buttons)
  58 {
  59         vortex_t *vortex = gameport_get_port_data(gameport);
  60         int i;
  61
  62         *buttons = (~hwread(vortex->mmio, VORTEX_GAME_LEGACY) >> 4) & 0xf;
  63
  64         for (i = 0; i < 4; i++) {
  65                 axes[i] =
  66                     hwread(vortex->mmio, VORTEX_GAME_AXIS + (i * AXIS_SIZE));
  67                 if (axes[i] == AXIS_RANGE)
  68                         axes[i] = -1;
  69         }
  70         return 0;
  71 }
  72
  73 static int vortex_game_open(struct gameport *gameport, int mode)
  74 {
  75         vortex_t *vortex = gameport_get_port_data(gameport);
  76
  77         switch (mode) {
  78         case GAMEPORT_MODE_COOKED:
  79                 hwwrite(vortex->mmio, VORTEX_CTRL2,
  80                         hwread(vortex->mmio,
  81                                VORTEX_CTRL2) | CTRL2_GAME_ADCMODE);
  82                 msleep(VORTEX_GAME_DWAIT);
  83                 return 0;
  84         case GAMEPORT_MODE_RAW:
  85                 hwwrite(vortex->mmio, VORTEX_CTRL2,
  86                         hwread(vortex->mmio,
  87                                VORTEX_CTRL2) & ~CTRL2_GAME_ADCMODE);
  88                 return 0;
  89         default:
  90                 return -1;
  91         }
  92
  93         return 0;
  94 }
  95
  96 static int __devinit vortex_gameport_register(vortex_t * vortex)
  97 {
  98         struct gameport *gp;
  99
 100         vortex->gameport = gp = gameport_allocate_port();
 101         if (!gp) {
 102                 printk(KERN_ERR "vortex: cannot allocate memory for gameport\n");
 103                 return -ENOMEM;
 104         };
 105
 106         gameport_set_name(gp, "AU88x0 Gameport");
 107         gameport_set_phys(gp, "pci%s/gameport0", pci_name(vortex->pci_dev));
 108         gameport_set_dev_parent(gp, &vortex->pci_dev->dev);
 109
 110         gp->read = vortex_game_read;
 111         gp->trigger = vortex_game_trigger;
 112         gp->cooked_read = vortex_game_cooked_read;
 113         gp->open = vortex_game_open;
 114
 115         gameport_set_port_data(gp, vortex);
 116         gp->fuzz = 64;
 117
 118         gameport_register_port(gp);
 119
 120         return 0;
 121 }
 122
 123 static void vortex_gameport_unregister(vortex_t * vortex)
 124 {
 125         if (vortex->gameport) {
 126                 gameport_unregister_port(vortex->gameport);
 127                 vortex->gameport = NULL;
 128         }
 129 }
 130
 131 #else
 132 static inline int vortex_gameport_register(vortex_t * vortex) { return -ENOSYS; }
 133 static inline void vortex_gameport_unregister(vortex_t * vortex) { }
 134 #endif