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 #include <linux/export.h>
  38
  39 #if IS_REACHABLE(CONFIG_GAMEPORT)
  40
  41 #define VORTEX_GAME_DWAIT       20      /* 20 ms */
  42
  43 static unsigned char vortex_game_read(struct gameport *gameport)
  44 {
  45         vortex_t *vortex = gameport_get_port_data(gameport);
  46         return hwread(vortex->mmio, VORTEX_GAME_LEGACY);
  47 }
  48
  49 static void vortex_game_trigger(struct gameport *gameport)
  50 {
  51         vortex_t *vortex = gameport_get_port_data(gameport);
  52         hwwrite(vortex->mmio, VORTEX_GAME_LEGACY, 0xff);
  53 }
  54
  55 static int
  56 vortex_game_cooked_read(struct gameport *gameport, int *axes, int *buttons)
  57 {
  58         vortex_t *vortex = gameport_get_port_data(gameport);
  59         int i;
  60
  61         *buttons = (~hwread(vortex->mmio, VORTEX_GAME_LEGACY) >> 4) & 0xf;
  62
  63         for (i = 0; i < 4; i++) {
  64                 axes[i] =
  65                     hwread(vortex->mmio, VORTEX_GAME_AXIS + (i * AXIS_SIZE));
  66                 if (axes[i] == AXIS_RANGE)
  67                         axes[i] = -1;
  68         }
  69         return 0;
  70 }
  71
  72 static int vortex_game_open(struct gameport *gameport, int mode)
  73 {
  74         vortex_t *vortex = gameport_get_port_data(gameport);
  75
  76         switch (mode) {
  77         case GAMEPORT_MODE_COOKED:
  78                 hwwrite(vortex->mmio, VORTEX_CTRL2,
  79                         hwread(vortex->mmio,
  80                                VORTEX_CTRL2) | CTRL2_GAME_ADCMODE);
  81                 msleep(VORTEX_GAME_DWAIT);
  82                 return 0;
  83         case GAMEPORT_MODE_RAW:
  84                 hwwrite(vortex->mmio, VORTEX_CTRL2,
  85                         hwread(vortex->mmio,
  86                                VORTEX_CTRL2) & ~CTRL2_GAME_ADCMODE);
  87                 return 0;
  88         default:
  89                 return -1;
  90         }
  91
  92         return 0;
  93 }
  94
  95 static int vortex_gameport_register(vortex_t *vortex)
  96 {
  97         struct gameport *gp;
  98
  99         vortex->gameport = gp = gameport_allocate_port();
 100         if (!gp) {
 101                 dev_err(vortex->card->dev,
 102                         "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