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#include <linux/export.h>
  38
  39#if IS_REACHABLE(CONFIG_GAMEPORT)
  40
  41#define VORTEX_GAME_DWAIT       20      /* 20 ms */
  42
  43static 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
  49static 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
  55static int
  56vortex_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
  72static 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
  95static 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
 123static 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
 132static inline int vortex_gameport_register(vortex_t * vortex) { return -ENOSYS; }
 133static inline void vortex_gameport_unregister(vortex_t * vortex) { }
 134#endif
 135