LXR linux/sound/pci/au88x0/au88x0

   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
  42static 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
  48static 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
  54static int
  55vortex_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
  71static 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
  94static 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
 121static 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
 130static inline int vortex_gameport_register(vortex_t * vortex) { return -ENOSYS; }
 131static inline void vortex_gameport_unregister(vortex_t * vortex) { }
 132#endif
 133