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1da177e4 LT |
1 | /* |
2 | * $Id: stinger.c,v 1.10 2002/01/22 20:29:31 vojtech Exp $ | |
3 | * | |
4 | * Copyright (c) 2000-2001 Vojtech Pavlik | |
5 | * Copyright (c) 2000 Mark Fletcher | |
6 | */ | |
7 | ||
8 | /* | |
9 | * Gravis Stinger gamepad driver for Linux | |
10 | */ | |
11 | ||
12 | /* | |
13 | * This program is free warftware; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
26 | * | |
27 | * Should you need to contact me, the author, you can do so either by | |
28 | * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail: | |
29 | * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic | |
30 | */ | |
31 | ||
32 | #include <linux/kernel.h> | |
33 | #include <linux/module.h> | |
34 | #include <linux/slab.h> | |
35 | #include <linux/input.h> | |
36 | #include <linux/serio.h> | |
37 | #include <linux/init.h> | |
38 | ||
39 | #define DRIVER_DESC "Gravis Stinger gamepad driver" | |
40 | ||
41 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
42 | MODULE_DESCRIPTION(DRIVER_DESC); | |
43 | MODULE_LICENSE("GPL"); | |
44 | ||
45 | /* | |
46 | * Constants. | |
47 | */ | |
48 | ||
49 | #define STINGER_MAX_LENGTH 8 | |
50 | ||
1da177e4 LT |
51 | /* |
52 | * Per-Stinger data. | |
53 | */ | |
54 | ||
55 | struct stinger { | |
17dd3f0f | 56 | struct input_dev *dev; |
1da177e4 LT |
57 | int idx; |
58 | unsigned char data[STINGER_MAX_LENGTH]; | |
59 | char phys[32]; | |
60 | }; | |
61 | ||
62 | /* | |
63 | * stinger_process_packet() decodes packets the driver receives from the | |
64 | * Stinger. It updates the data accordingly. | |
65 | */ | |
66 | ||
67 | static void stinger_process_packet(struct stinger *stinger, struct pt_regs *regs) | |
68 | { | |
17dd3f0f | 69 | struct input_dev *dev = stinger->dev; |
1da177e4 LT |
70 | unsigned char *data = stinger->data; |
71 | ||
72 | if (!stinger->idx) return; | |
73 | ||
74 | input_regs(dev, regs); | |
75 | ||
76 | input_report_key(dev, BTN_A, ((data[0] & 0x20) >> 5)); | |
77 | input_report_key(dev, BTN_B, ((data[0] & 0x10) >> 4)); | |
78 | input_report_key(dev, BTN_C, ((data[0] & 0x08) >> 3)); | |
79 | input_report_key(dev, BTN_X, ((data[0] & 0x04) >> 2)); | |
80 | input_report_key(dev, BTN_Y, ((data[3] & 0x20) >> 5)); | |
81 | input_report_key(dev, BTN_Z, ((data[3] & 0x10) >> 4)); | |
82 | input_report_key(dev, BTN_TL, ((data[3] & 0x08) >> 3)); | |
83 | input_report_key(dev, BTN_TR, ((data[3] & 0x04) >> 2)); | |
84 | input_report_key(dev, BTN_SELECT, ((data[3] & 0x02) >> 1)); | |
85 | input_report_key(dev, BTN_START, (data[3] & 0x01)); | |
86 | ||
87 | input_report_abs(dev, ABS_X, (data[1] & 0x3F) - ((data[0] & 0x01) << 6)); | |
88 | input_report_abs(dev, ABS_Y, ((data[0] & 0x02) << 5) - (data[2] & 0x3F)); | |
89 | ||
90 | input_sync(dev); | |
91 | ||
92 | return; | |
93 | } | |
94 | ||
95 | /* | |
96 | * stinger_interrupt() is called by the low level driver when characters | |
97 | * are ready for us. We then buffer them for further processing, or call the | |
98 | * packet processing routine. | |
99 | */ | |
100 | ||
101 | static irqreturn_t stinger_interrupt(struct serio *serio, | |
102 | unsigned char data, unsigned int flags, struct pt_regs *regs) | |
103 | { | |
104 | struct stinger *stinger = serio_get_drvdata(serio); | |
105 | ||
106 | /* All Stinger packets are 4 bytes */ | |
107 | ||
108 | if (stinger->idx < STINGER_MAX_LENGTH) | |
109 | stinger->data[stinger->idx++] = data; | |
110 | ||
111 | if (stinger->idx == 4) { | |
112 | stinger_process_packet(stinger, regs); | |
113 | stinger->idx = 0; | |
114 | } | |
115 | ||
116 | return IRQ_HANDLED; | |
117 | } | |
118 | ||
119 | /* | |
120 | * stinger_disconnect() is the opposite of stinger_connect() | |
121 | */ | |
122 | ||
123 | static void stinger_disconnect(struct serio *serio) | |
124 | { | |
125 | struct stinger *stinger = serio_get_drvdata(serio); | |
126 | ||
1da177e4 LT |
127 | serio_close(serio); |
128 | serio_set_drvdata(serio, NULL); | |
17dd3f0f | 129 | input_unregister_device(stinger->dev); |
1da177e4 LT |
130 | kfree(stinger); |
131 | } | |
132 | ||
133 | /* | |
134 | * stinger_connect() is the routine that is called when someone adds a | |
135 | * new serio device that supports Stinger protocol and registers it as | |
136 | * an input device. | |
137 | */ | |
138 | ||
139 | static int stinger_connect(struct serio *serio, struct serio_driver *drv) | |
140 | { | |
141 | struct stinger *stinger; | |
17dd3f0f DT |
142 | struct input_dev *input_dev; |
143 | int err = -ENOMEM; | |
1da177e4 | 144 | |
17dd3f0f DT |
145 | stinger = kmalloc(sizeof(struct stinger), GFP_KERNEL); |
146 | input_dev = input_allocate_device(); | |
147 | if (!stinger || !input_dev) | |
148 | goto fail; | |
1da177e4 | 149 | |
17dd3f0f | 150 | stinger->dev = input_dev; |
1da177e4 LT |
151 | sprintf(stinger->phys, "%s/serio0", serio->phys); |
152 | ||
17dd3f0f DT |
153 | input_dev->name = "Gravis Stinger"; |
154 | input_dev->phys = stinger->phys; | |
155 | input_dev->id.bustype = BUS_RS232; | |
156 | input_dev->id.vendor = SERIO_STINGER; | |
157 | input_dev->id.product = 0x0001; | |
158 | input_dev->id.version = 0x0100; | |
159 | input_dev->cdev.dev = &serio->dev; | |
160 | input_dev->private = stinger; | |
161 | ||
162 | input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS); | |
163 | input_dev->keybit[LONG(BTN_A)] = BIT(BTN_A) | BIT(BTN_B) | BIT(BTN_C) | BIT(BTN_X) | | |
164 | BIT(BTN_Y) | BIT(BTN_Z) | BIT(BTN_TL) | BIT(BTN_TR) | | |
165 | BIT(BTN_START) | BIT(BTN_SELECT); | |
166 | input_set_abs_params(input_dev, ABS_X, -64, 64, 0, 4); | |
167 | input_set_abs_params(input_dev, ABS_Y, -64, 64, 0, 4); | |
1da177e4 LT |
168 | |
169 | serio_set_drvdata(serio, stinger); | |
170 | ||
171 | err = serio_open(serio, drv); | |
17dd3f0f DT |
172 | if (err) |
173 | goto fail; | |
1da177e4 | 174 | |
17dd3f0f | 175 | input_register_device(stinger->dev); |
1da177e4 | 176 | return 0; |
17dd3f0f DT |
177 | |
178 | fail: serio_set_drvdata(serio, NULL); | |
179 | input_free_device(input_dev); | |
180 | kfree(stinger); | |
181 | return err; | |
1da177e4 LT |
182 | } |
183 | ||
184 | /* | |
185 | * The serio driver structure. | |
186 | */ | |
187 | ||
188 | static struct serio_device_id stinger_serio_ids[] = { | |
189 | { | |
190 | .type = SERIO_RS232, | |
191 | .proto = SERIO_STINGER, | |
192 | .id = SERIO_ANY, | |
193 | .extra = SERIO_ANY, | |
194 | }, | |
195 | { 0 } | |
196 | }; | |
197 | ||
198 | MODULE_DEVICE_TABLE(serio, stinger_serio_ids); | |
199 | ||
200 | static struct serio_driver stinger_drv = { | |
201 | .driver = { | |
202 | .name = "stinger", | |
203 | }, | |
204 | .description = DRIVER_DESC, | |
205 | .id_table = stinger_serio_ids, | |
206 | .interrupt = stinger_interrupt, | |
207 | .connect = stinger_connect, | |
208 | .disconnect = stinger_disconnect, | |
209 | }; | |
210 | ||
211 | /* | |
212 | * The functions for inserting/removing us as a module. | |
213 | */ | |
214 | ||
215 | static int __init stinger_init(void) | |
216 | { | |
217 | serio_register_driver(&stinger_drv); | |
218 | return 0; | |
219 | } | |
220 | ||
221 | static void __exit stinger_exit(void) | |
222 | { | |
223 | serio_unregister_driver(&stinger_drv); | |
224 | } | |
225 | ||
226 | module_init(stinger_init); | |
227 | module_exit(stinger_exit); |