Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2000-2001 Vojtech Pavlik |
3 | * Copyright (c) 2000 Mark Fletcher | |
4 | */ | |
5 | ||
6 | /* | |
7 | * Gravis Stinger gamepad driver for Linux | |
8 | */ | |
9 | ||
10 | /* | |
11 | * This program is free warftware; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or | |
14 | * (at your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
24 | * | |
25 | * Should you need to contact me, the author, you can do so either by | |
26 | * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail: | |
27 | * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic | |
28 | */ | |
29 | ||
30 | #include <linux/kernel.h> | |
31 | #include <linux/module.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/input.h> | |
34 | #include <linux/serio.h> | |
1da177e4 LT |
35 | |
36 | #define DRIVER_DESC "Gravis Stinger gamepad driver" | |
37 | ||
38 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
39 | MODULE_DESCRIPTION(DRIVER_DESC); | |
40 | MODULE_LICENSE("GPL"); | |
41 | ||
42 | /* | |
43 | * Constants. | |
44 | */ | |
45 | ||
46 | #define STINGER_MAX_LENGTH 8 | |
47 | ||
1da177e4 LT |
48 | /* |
49 | * Per-Stinger data. | |
50 | */ | |
51 | ||
52 | struct stinger { | |
17dd3f0f | 53 | struct input_dev *dev; |
1da177e4 LT |
54 | int idx; |
55 | unsigned char data[STINGER_MAX_LENGTH]; | |
56 | char phys[32]; | |
57 | }; | |
58 | ||
59 | /* | |
60 | * stinger_process_packet() decodes packets the driver receives from the | |
61 | * Stinger. It updates the data accordingly. | |
62 | */ | |
63 | ||
7d12e780 | 64 | static void stinger_process_packet(struct stinger *stinger) |
1da177e4 | 65 | { |
17dd3f0f | 66 | struct input_dev *dev = stinger->dev; |
1da177e4 LT |
67 | unsigned char *data = stinger->data; |
68 | ||
69 | if (!stinger->idx) return; | |
70 | ||
1da177e4 LT |
71 | input_report_key(dev, BTN_A, ((data[0] & 0x20) >> 5)); |
72 | input_report_key(dev, BTN_B, ((data[0] & 0x10) >> 4)); | |
73 | input_report_key(dev, BTN_C, ((data[0] & 0x08) >> 3)); | |
74 | input_report_key(dev, BTN_X, ((data[0] & 0x04) >> 2)); | |
75 | input_report_key(dev, BTN_Y, ((data[3] & 0x20) >> 5)); | |
76 | input_report_key(dev, BTN_Z, ((data[3] & 0x10) >> 4)); | |
77 | input_report_key(dev, BTN_TL, ((data[3] & 0x08) >> 3)); | |
78 | input_report_key(dev, BTN_TR, ((data[3] & 0x04) >> 2)); | |
79 | input_report_key(dev, BTN_SELECT, ((data[3] & 0x02) >> 1)); | |
80 | input_report_key(dev, BTN_START, (data[3] & 0x01)); | |
81 | ||
82 | input_report_abs(dev, ABS_X, (data[1] & 0x3F) - ((data[0] & 0x01) << 6)); | |
83 | input_report_abs(dev, ABS_Y, ((data[0] & 0x02) << 5) - (data[2] & 0x3F)); | |
84 | ||
85 | input_sync(dev); | |
86 | ||
87 | return; | |
88 | } | |
89 | ||
90 | /* | |
91 | * stinger_interrupt() is called by the low level driver when characters | |
92 | * are ready for us. We then buffer them for further processing, or call the | |
93 | * packet processing routine. | |
94 | */ | |
95 | ||
96 | static irqreturn_t stinger_interrupt(struct serio *serio, | |
7d12e780 | 97 | unsigned char data, unsigned int flags) |
1da177e4 LT |
98 | { |
99 | struct stinger *stinger = serio_get_drvdata(serio); | |
100 | ||
101 | /* All Stinger packets are 4 bytes */ | |
102 | ||
103 | if (stinger->idx < STINGER_MAX_LENGTH) | |
104 | stinger->data[stinger->idx++] = data; | |
105 | ||
106 | if (stinger->idx == 4) { | |
7d12e780 | 107 | stinger_process_packet(stinger); |
1da177e4 LT |
108 | stinger->idx = 0; |
109 | } | |
110 | ||
111 | return IRQ_HANDLED; | |
112 | } | |
113 | ||
114 | /* | |
115 | * stinger_disconnect() is the opposite of stinger_connect() | |
116 | */ | |
117 | ||
118 | static void stinger_disconnect(struct serio *serio) | |
119 | { | |
120 | struct stinger *stinger = serio_get_drvdata(serio); | |
121 | ||
1da177e4 LT |
122 | serio_close(serio); |
123 | serio_set_drvdata(serio, NULL); | |
17dd3f0f | 124 | input_unregister_device(stinger->dev); |
1da177e4 LT |
125 | kfree(stinger); |
126 | } | |
127 | ||
128 | /* | |
129 | * stinger_connect() is the routine that is called when someone adds a | |
130 | * new serio device that supports Stinger protocol and registers it as | |
131 | * an input device. | |
132 | */ | |
133 | ||
134 | static int stinger_connect(struct serio *serio, struct serio_driver *drv) | |
135 | { | |
136 | struct stinger *stinger; | |
17dd3f0f DT |
137 | struct input_dev *input_dev; |
138 | int err = -ENOMEM; | |
1da177e4 | 139 | |
17dd3f0f DT |
140 | stinger = kmalloc(sizeof(struct stinger), GFP_KERNEL); |
141 | input_dev = input_allocate_device(); | |
142 | if (!stinger || !input_dev) | |
127278ce | 143 | goto fail1; |
1da177e4 | 144 | |
17dd3f0f | 145 | stinger->dev = input_dev; |
10ca4c0a | 146 | snprintf(stinger->phys, sizeof(stinger->phys), "%s/serio0", serio->phys); |
1da177e4 | 147 | |
17dd3f0f DT |
148 | input_dev->name = "Gravis Stinger"; |
149 | input_dev->phys = stinger->phys; | |
150 | input_dev->id.bustype = BUS_RS232; | |
151 | input_dev->id.vendor = SERIO_STINGER; | |
152 | input_dev->id.product = 0x0001; | |
153 | input_dev->id.version = 0x0100; | |
935e658e | 154 | input_dev->dev.parent = &serio->dev; |
17dd3f0f | 155 | |
7b19ada2 JS |
156 | input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); |
157 | input_dev->keybit[BIT_WORD(BTN_A)] = BIT_MASK(BTN_A) | BIT_MASK(BTN_B) | | |
158 | BIT_MASK(BTN_C) | BIT_MASK(BTN_X) | BIT_MASK(BTN_Y) | | |
159 | BIT_MASK(BTN_Z) | BIT_MASK(BTN_TL) | BIT_MASK(BTN_TR) | | |
160 | BIT_MASK(BTN_START) | BIT_MASK(BTN_SELECT); | |
17dd3f0f DT |
161 | input_set_abs_params(input_dev, ABS_X, -64, 64, 0, 4); |
162 | input_set_abs_params(input_dev, ABS_Y, -64, 64, 0, 4); | |
1da177e4 LT |
163 | |
164 | serio_set_drvdata(serio, stinger); | |
165 | ||
166 | err = serio_open(serio, drv); | |
17dd3f0f | 167 | if (err) |
127278ce DT |
168 | goto fail2; |
169 | ||
170 | err = input_register_device(stinger->dev); | |
171 | if (err) | |
172 | goto fail3; | |
1da177e4 LT |
173 | |
174 | return 0; | |
17dd3f0f | 175 | |
127278ce DT |
176 | fail3: serio_close(serio); |
177 | fail2: serio_set_drvdata(serio, NULL); | |
178 | fail1: input_free_device(input_dev); | |
17dd3f0f DT |
179 | kfree(stinger); |
180 | return err; | |
1da177e4 LT |
181 | } |
182 | ||
183 | /* | |
184 | * The serio driver structure. | |
185 | */ | |
186 | ||
187 | static struct serio_device_id stinger_serio_ids[] = { | |
188 | { | |
189 | .type = SERIO_RS232, | |
190 | .proto = SERIO_STINGER, | |
191 | .id = SERIO_ANY, | |
192 | .extra = SERIO_ANY, | |
193 | }, | |
194 | { 0 } | |
195 | }; | |
196 | ||
197 | MODULE_DEVICE_TABLE(serio, stinger_serio_ids); | |
198 | ||
199 | static struct serio_driver stinger_drv = { | |
200 | .driver = { | |
201 | .name = "stinger", | |
202 | }, | |
203 | .description = DRIVER_DESC, | |
204 | .id_table = stinger_serio_ids, | |
205 | .interrupt = stinger_interrupt, | |
206 | .connect = stinger_connect, | |
207 | .disconnect = stinger_disconnect, | |
208 | }; | |
209 | ||
65ac9f7a | 210 | module_serio_driver(stinger_drv); |