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 defined(CONFIG_GAMEPORT) || (defined(MODULE) && defined(CONFIG_GAMEPORT_MODULE))
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