xref: /linux/drivers/input/gameport/fm801-gp.c (revision f3d9478b2ce468c3115b02ecae7e975990697f15)
1 /*
2  *  FM801 gameport driver for Linux
3  *
4  *  Copyright (c) by Takashi Iwai <tiwai@suse.de>
5  *
6  *
7  *   This program is free software; you can redistribute it and/or modify
8  *   it under the terms of the GNU General Public License as published by
9  *   the Free Software Foundation; either version 2 of the License, or
10  *   (at your option) any later version.
11  *
12  *   This program is distributed in the hope that it will be useful,
13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  *   GNU General Public License for more details.
16  *
17  *   You should have received a copy of the GNU General Public License
18  *   along with this program; if not, write to the Free Software
19  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20  *
21  */
22 
23 #include <asm/io.h>
24 #include <linux/delay.h>
25 #include <linux/errno.h>
26 #include <linux/ioport.h>
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/pci.h>
30 #include <linux/init.h>
31 #include <linux/slab.h>
32 #include <linux/gameport.h>
33 
34 #define PCI_VENDOR_ID_FORTEMEDIA	0x1319
35 #define PCI_DEVICE_ID_FM801_GP	0x0802
36 
37 #define HAVE_COOKED
38 
39 struct fm801_gp {
40 	struct gameport *gameport;
41 	struct resource *res_port;
42 };
43 
44 #ifdef HAVE_COOKED
45 static int fm801_gp_cooked_read(struct gameport *gameport, int *axes, int *buttons)
46 {
47 	unsigned short w;
48 
49 	w = inw(gameport->io + 2);
50 	*buttons = (~w >> 14) & 0x03;
51 	axes[0] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5);
52 	w = inw(gameport->io + 4);
53 	axes[1] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5);
54 	w = inw(gameport->io + 6);
55 	*buttons |= ((~w >> 14) & 0x03) << 2;
56 	axes[2] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5);
57 	w = inw(gameport->io + 8);
58 	axes[3] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5);
59 	outw(0xff, gameport->io); /* reset */
60 
61         return 0;
62 }
63 #endif
64 
65 static int fm801_gp_open(struct gameport *gameport, int mode)
66 {
67 	switch (mode) {
68 #ifdef HAVE_COOKED
69 	case GAMEPORT_MODE_COOKED:
70 		return 0;
71 #endif
72 	case GAMEPORT_MODE_RAW:
73 		return 0;
74 	default:
75 		return -1;
76 	}
77 
78 	return 0;
79 }
80 
81 static int __devinit fm801_gp_probe(struct pci_dev *pci, const struct pci_device_id *id)
82 {
83 	struct fm801_gp *gp;
84 	struct gameport *port;
85 
86 	gp = kzalloc(sizeof(struct fm801_gp), GFP_KERNEL);
87 	port = gameport_allocate_port();
88 	if (!gp || !port) {
89 		printk(KERN_ERR "fm801-gp: Memory allocation failed\n");
90 		kfree(gp);
91 		gameport_free_port(port);
92 		return -ENOMEM;
93 	}
94 
95 	pci_enable_device(pci);
96 
97 	port->open = fm801_gp_open;
98 #ifdef HAVE_COOKED
99 	port->cooked_read = fm801_gp_cooked_read;
100 #endif
101 	gameport_set_name(port, "FM801");
102 	gameport_set_phys(port, "pci%s/gameport0", pci_name(pci));
103 	port->dev.parent = &pci->dev;
104 	port->io = pci_resource_start(pci, 0);
105 
106 	gp->gameport = port;
107 	gp->res_port = request_region(port->io, 0x10, "FM801 GP");
108 	if (!gp->res_port) {
109 		kfree(gp);
110 		gameport_free_port(port);
111 		printk(KERN_DEBUG "fm801-gp: unable to grab region 0x%x-0x%x\n",
112 			port->io, port->io + 0x0f);
113 		return -EBUSY;
114 	}
115 
116 	pci_set_drvdata(pci, gp);
117 
118 	outb(0x60, port->io + 0x0d); /* enable joystick 1 and 2 */
119 	gameport_register_port(port);
120 
121 	return 0;
122 }
123 
124 static void __devexit fm801_gp_remove(struct pci_dev *pci)
125 {
126 	struct fm801_gp *gp = pci_get_drvdata(pci);
127 
128 	if (gp) {
129 		gameport_unregister_port(gp->gameport);
130 		release_resource(gp->res_port);
131 		kfree(gp);
132 	}
133 }
134 
135 static struct pci_device_id fm801_gp_id_table[] = {
136 	{ PCI_VENDOR_ID_FORTEMEDIA, PCI_DEVICE_ID_FM801_GP, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0  },
137 	{ 0 }
138 };
139 
140 static struct pci_driver fm801_gp_driver = {
141 	.name =		"FM801_gameport",
142 	.id_table =	fm801_gp_id_table,
143 	.probe =	fm801_gp_probe,
144 	.remove =	__devexit_p(fm801_gp_remove),
145 };
146 
147 static int __init fm801_gp_init(void)
148 {
149 	return pci_register_driver(&fm801_gp_driver);
150 }
151 
152 static void __exit fm801_gp_exit(void)
153 {
154 	pci_unregister_driver(&fm801_gp_driver);
155 }
156 
157 module_init(fm801_gp_init);
158 module_exit(fm801_gp_exit);
159 
160 MODULE_DEVICE_TABLE(pci, fm801_gp_id_table);
161 
162 MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
163 MODULE_LICENSE("GPL");
164