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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> | |
1da177e4 LT |
35 | |
36 | #define DRIVER_DESC "Gunze AHL-51S touchscreen driver" | |
37 | ||
38 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
39 | MODULE_DESCRIPTION(DRIVER_DESC); | |
40 | MODULE_LICENSE("GPL"); | |
41 | ||
42 | /* | |
43 | * Definitions & global arrays. | |
44 | */ | |
45 | ||
46 | #define GUNZE_MAX_LENGTH 10 | |
47 | ||
1da177e4 LT |
48 | /* |
49 | * Per-touchscreen data. | |
50 | */ | |
51 | ||
52 | struct gunze { | |
eca1ed19 | 53 | struct input_dev *dev; |
1da177e4 LT |
54 | struct serio *serio; |
55 | int idx; | |
56 | unsigned char data[GUNZE_MAX_LENGTH]; | |
57 | char phys[32]; | |
58 | }; | |
59 | ||
7d12e780 | 60 | static void gunze_process_packet(struct gunze* gunze) |
1da177e4 | 61 | { |
eca1ed19 | 62 | struct input_dev *dev = gunze->dev; |
1da177e4 LT |
63 | |
64 | if (gunze->idx != GUNZE_MAX_LENGTH || gunze->data[5] != ',' || | |
65 | (gunze->data[0] != 'T' && gunze->data[0] != 'R')) { | |
a07461ec | 66 | printk(KERN_WARNING "gunze.c: bad packet: >%.*s<\n", GUNZE_MAX_LENGTH, gunze->data); |
1da177e4 LT |
67 | return; |
68 | } | |
69 | ||
1da177e4 LT |
70 | input_report_abs(dev, ABS_X, simple_strtoul(gunze->data + 1, NULL, 10)); |
71 | input_report_abs(dev, ABS_Y, 1024 - simple_strtoul(gunze->data + 6, NULL, 10)); | |
72 | input_report_key(dev, BTN_TOUCH, gunze->data[0] == 'T'); | |
73 | input_sync(dev); | |
74 | } | |
75 | ||
76 | static irqreturn_t gunze_interrupt(struct serio *serio, | |
7d12e780 | 77 | unsigned char data, unsigned int flags) |
1da177e4 LT |
78 | { |
79 | struct gunze* gunze = serio_get_drvdata(serio); | |
80 | ||
81 | if (data == '\r') { | |
7d12e780 | 82 | gunze_process_packet(gunze); |
1da177e4 LT |
83 | gunze->idx = 0; |
84 | } else { | |
85 | if (gunze->idx < GUNZE_MAX_LENGTH) | |
86 | gunze->data[gunze->idx++] = data; | |
87 | } | |
88 | return IRQ_HANDLED; | |
89 | } | |
90 | ||
91 | /* | |
92 | * gunze_disconnect() is the opposite of gunze_connect() | |
93 | */ | |
94 | ||
95 | static void gunze_disconnect(struct serio *serio) | |
96 | { | |
eca1ed19 | 97 | struct gunze *gunze = serio_get_drvdata(serio); |
1da177e4 | 98 | |
eca1ed19 DT |
99 | input_get_device(gunze->dev); |
100 | input_unregister_device(gunze->dev); | |
1da177e4 LT |
101 | serio_close(serio); |
102 | serio_set_drvdata(serio, NULL); | |
eca1ed19 | 103 | input_put_device(gunze->dev); |
1da177e4 LT |
104 | kfree(gunze); |
105 | } | |
106 | ||
107 | /* | |
108 | * gunze_connect() is the routine that is called when someone adds a | |
109 | * new serio device that supports Gunze protocol and registers it as | |
110 | * an input device. | |
111 | */ | |
112 | ||
113 | static int gunze_connect(struct serio *serio, struct serio_driver *drv) | |
114 | { | |
115 | struct gunze *gunze; | |
eca1ed19 | 116 | struct input_dev *input_dev; |
1da177e4 LT |
117 | int err; |
118 | ||
eca1ed19 DT |
119 | gunze = kzalloc(sizeof(struct gunze), GFP_KERNEL); |
120 | input_dev = input_allocate_device(); | |
121 | if (!gunze || !input_dev) { | |
122 | err = -ENOMEM; | |
52c1f570 | 123 | goto fail1; |
eca1ed19 | 124 | } |
1da177e4 LT |
125 | |
126 | gunze->serio = serio; | |
eca1ed19 | 127 | gunze->dev = input_dev; |
a21466cc | 128 | snprintf(gunze->phys, sizeof(serio->phys), "%s/input0", serio->phys); |
1da177e4 | 129 | |
eca1ed19 DT |
130 | input_dev->name = "Gunze AHL-51S TouchScreen"; |
131 | input_dev->phys = gunze->phys; | |
132 | input_dev->id.bustype = BUS_RS232; | |
133 | input_dev->id.vendor = SERIO_GUNZE; | |
134 | input_dev->id.product = 0x0051; | |
135 | input_dev->id.version = 0x0100; | |
a5394fb0 | 136 | input_dev->dev.parent = &serio->dev; |
7b19ada2 JS |
137 | input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); |
138 | input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); | |
eca1ed19 DT |
139 | input_set_abs_params(input_dev, ABS_X, 24, 1000, 0, 0); |
140 | input_set_abs_params(input_dev, ABS_Y, 24, 1000, 0, 0); | |
1da177e4 LT |
141 | |
142 | serio_set_drvdata(serio, gunze); | |
143 | ||
144 | err = serio_open(serio, drv); | |
eca1ed19 | 145 | if (err) |
52c1f570 DT |
146 | goto fail2; |
147 | ||
148 | err = input_register_device(gunze->dev); | |
149 | if (err) | |
150 | goto fail3; | |
1da177e4 LT |
151 | |
152 | return 0; | |
eca1ed19 | 153 | |
52c1f570 DT |
154 | fail3: serio_close(serio); |
155 | fail2: serio_set_drvdata(serio, NULL); | |
156 | fail1: input_free_device(input_dev); | |
eca1ed19 DT |
157 | kfree(gunze); |
158 | return err; | |
1da177e4 LT |
159 | } |
160 | ||
161 | /* | |
162 | * The serio driver structure. | |
163 | */ | |
164 | ||
165 | static struct serio_device_id gunze_serio_ids[] = { | |
166 | { | |
167 | .type = SERIO_RS232, | |
168 | .proto = SERIO_GUNZE, | |
169 | .id = SERIO_ANY, | |
170 | .extra = SERIO_ANY, | |
171 | }, | |
172 | { 0 } | |
173 | }; | |
174 | ||
175 | MODULE_DEVICE_TABLE(serio, gunze_serio_ids); | |
176 | ||
177 | static struct serio_driver gunze_drv = { | |
178 | .driver = { | |
179 | .name = "gunze", | |
180 | }, | |
181 | .description = DRIVER_DESC, | |
182 | .id_table = gunze_serio_ids, | |
183 | .interrupt = gunze_interrupt, | |
184 | .connect = gunze_connect, | |
185 | .disconnect = gunze_disconnect, | |
186 | }; | |
187 | ||
65ac9f7a | 188 | module_serio_driver(gunze_drv); |