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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2000-2001 Vojtech Pavlik |
3 | */ | |
4 | ||
5 | /* | |
6 | * Gunze AHL-51S touchscreen driver for Linux | |
7 | */ | |
8 | ||
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@ucw.cz>, or by paper mail: | |
26 | * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic | |
27 | */ | |
28 | ||
29 | #include <linux/errno.h> | |
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> | |
35 | #include <linux/init.h> | |
36 | ||
37 | #define DRIVER_DESC "Gunze AHL-51S touchscreen driver" | |
38 | ||
39 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
40 | MODULE_DESCRIPTION(DRIVER_DESC); | |
41 | MODULE_LICENSE("GPL"); | |
42 | ||
43 | /* | |
44 | * Definitions & global arrays. | |
45 | */ | |
46 | ||
47 | #define GUNZE_MAX_LENGTH 10 | |
48 | ||
1da177e4 LT |
49 | /* |
50 | * Per-touchscreen data. | |
51 | */ | |
52 | ||
53 | struct gunze { | |
eca1ed19 | 54 | struct input_dev *dev; |
1da177e4 LT |
55 | struct serio *serio; |
56 | int idx; | |
57 | unsigned char data[GUNZE_MAX_LENGTH]; | |
58 | char phys[32]; | |
59 | }; | |
60 | ||
7d12e780 | 61 | static void gunze_process_packet(struct gunze* gunze) |
1da177e4 | 62 | { |
eca1ed19 | 63 | struct input_dev *dev = gunze->dev; |
1da177e4 LT |
64 | |
65 | if (gunze->idx != GUNZE_MAX_LENGTH || gunze->data[5] != ',' || | |
66 | (gunze->data[0] != 'T' && gunze->data[0] != 'R')) { | |
a07461ec | 67 | printk(KERN_WARNING "gunze.c: bad packet: >%.*s<\n", GUNZE_MAX_LENGTH, gunze->data); |
1da177e4 LT |
68 | return; |
69 | } | |
70 | ||
1da177e4 LT |
71 | input_report_abs(dev, ABS_X, simple_strtoul(gunze->data + 1, NULL, 10)); |
72 | input_report_abs(dev, ABS_Y, 1024 - simple_strtoul(gunze->data + 6, NULL, 10)); | |
73 | input_report_key(dev, BTN_TOUCH, gunze->data[0] == 'T'); | |
74 | input_sync(dev); | |
75 | } | |
76 | ||
77 | static irqreturn_t gunze_interrupt(struct serio *serio, | |
7d12e780 | 78 | unsigned char data, unsigned int flags) |
1da177e4 LT |
79 | { |
80 | struct gunze* gunze = serio_get_drvdata(serio); | |
81 | ||
82 | if (data == '\r') { | |
7d12e780 | 83 | gunze_process_packet(gunze); |
1da177e4 LT |
84 | gunze->idx = 0; |
85 | } else { | |
86 | if (gunze->idx < GUNZE_MAX_LENGTH) | |
87 | gunze->data[gunze->idx++] = data; | |
88 | } | |
89 | return IRQ_HANDLED; | |
90 | } | |
91 | ||
92 | /* | |
93 | * gunze_disconnect() is the opposite of gunze_connect() | |
94 | */ | |
95 | ||
96 | static void gunze_disconnect(struct serio *serio) | |
97 | { | |
eca1ed19 | 98 | struct gunze *gunze = serio_get_drvdata(serio); |
1da177e4 | 99 | |
eca1ed19 DT |
100 | input_get_device(gunze->dev); |
101 | input_unregister_device(gunze->dev); | |
1da177e4 LT |
102 | serio_close(serio); |
103 | serio_set_drvdata(serio, NULL); | |
eca1ed19 | 104 | input_put_device(gunze->dev); |
1da177e4 LT |
105 | kfree(gunze); |
106 | } | |
107 | ||
108 | /* | |
109 | * gunze_connect() is the routine that is called when someone adds a | |
110 | * new serio device that supports Gunze protocol and registers it as | |
111 | * an input device. | |
112 | */ | |
113 | ||
114 | static int gunze_connect(struct serio *serio, struct serio_driver *drv) | |
115 | { | |
116 | struct gunze *gunze; | |
eca1ed19 | 117 | struct input_dev *input_dev; |
1da177e4 LT |
118 | int err; |
119 | ||
eca1ed19 DT |
120 | gunze = kzalloc(sizeof(struct gunze), GFP_KERNEL); |
121 | input_dev = input_allocate_device(); | |
122 | if (!gunze || !input_dev) { | |
123 | err = -ENOMEM; | |
52c1f570 | 124 | goto fail1; |
eca1ed19 | 125 | } |
1da177e4 LT |
126 | |
127 | gunze->serio = serio; | |
eca1ed19 | 128 | gunze->dev = input_dev; |
a21466cc | 129 | snprintf(gunze->phys, sizeof(serio->phys), "%s/input0", serio->phys); |
1da177e4 | 130 | |
eca1ed19 DT |
131 | input_dev->name = "Gunze AHL-51S TouchScreen"; |
132 | input_dev->phys = gunze->phys; | |
133 | input_dev->id.bustype = BUS_RS232; | |
134 | input_dev->id.vendor = SERIO_GUNZE; | |
135 | input_dev->id.product = 0x0051; | |
136 | input_dev->id.version = 0x0100; | |
a5394fb0 | 137 | input_dev->dev.parent = &serio->dev; |
7b19ada2 JS |
138 | input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); |
139 | input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); | |
eca1ed19 DT |
140 | input_set_abs_params(input_dev, ABS_X, 24, 1000, 0, 0); |
141 | input_set_abs_params(input_dev, ABS_Y, 24, 1000, 0, 0); | |
1da177e4 LT |
142 | |
143 | serio_set_drvdata(serio, gunze); | |
144 | ||
145 | err = serio_open(serio, drv); | |
eca1ed19 | 146 | if (err) |
52c1f570 DT |
147 | goto fail2; |
148 | ||
149 | err = input_register_device(gunze->dev); | |
150 | if (err) | |
151 | goto fail3; | |
1da177e4 LT |
152 | |
153 | return 0; | |
eca1ed19 | 154 | |
52c1f570 DT |
155 | fail3: serio_close(serio); |
156 | fail2: serio_set_drvdata(serio, NULL); | |
157 | fail1: input_free_device(input_dev); | |
eca1ed19 DT |
158 | kfree(gunze); |
159 | return err; | |
1da177e4 LT |
160 | } |
161 | ||
162 | /* | |
163 | * The serio driver structure. | |
164 | */ | |
165 | ||
166 | static struct serio_device_id gunze_serio_ids[] = { | |
167 | { | |
168 | .type = SERIO_RS232, | |
169 | .proto = SERIO_GUNZE, | |
170 | .id = SERIO_ANY, | |
171 | .extra = SERIO_ANY, | |
172 | }, | |
173 | { 0 } | |
174 | }; | |
175 | ||
176 | MODULE_DEVICE_TABLE(serio, gunze_serio_ids); | |
177 | ||
178 | static struct serio_driver gunze_drv = { | |
179 | .driver = { | |
180 | .name = "gunze", | |
181 | }, | |
182 | .description = DRIVER_DESC, | |
183 | .id_table = gunze_serio_ids, | |
184 | .interrupt = gunze_interrupt, | |
185 | .connect = gunze_connect, | |
186 | .disconnect = gunze_disconnect, | |
187 | }; | |
188 | ||
189 | /* | |
190 | * The functions for inserting/removing us as a module. | |
191 | */ | |
192 | ||
193 | static int __init gunze_init(void) | |
194 | { | |
153a9df0 | 195 | return serio_register_driver(&gunze_drv); |
1da177e4 LT |
196 | } |
197 | ||
198 | static void __exit gunze_exit(void) | |
199 | { | |
200 | serio_unregister_driver(&gunze_drv); | |
201 | } | |
202 | ||
203 | module_init(gunze_init); | |
204 | module_exit(gunze_exit); |