1/*
2 * $Id: au88x0_game.c,v 1.1.1.1 2007/08/03 18:54:01 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
45static 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
51static 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
57static int
58vortex_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
74static 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
97static 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
124static 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
133static inline int vortex_gameport_register(vortex_t * vortex) { return -ENOSYS; }
134static inline void vortex_gameport_unregister(vortex_t * vortex) { }
135#endif
136