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1/*
2 * Touchright serial touchscreen driver
3 *
4 * Copyright (c) 2006 Rick Koch <n1gp@hotmail.com>
5 *
6 * Based on MicroTouch driver (drivers/input/touchscreen/mtouch.c)
7 * Copyright (c) 2004 Vojtech Pavlik
8 * and Dan Streetman <ddstreet@ieee.org>
9 */
10
11/*
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License version 2 as published
14 * by the Free Software Foundation.
15 */
16
17#include <linux/errno.h>
18#include <linux/kernel.h>
19#include <linux/module.h>
20#include <linux/slab.h>
21#include <linux/input.h>
22#include <linux/serio.h>
23#include <linux/init.h>
24
25#define DRIVER_DESC "Touchright serial touchscreen driver"
26
27MODULE_AUTHOR("Rick Koch <n1gp@hotmail.com>");
28MODULE_DESCRIPTION(DRIVER_DESC);
29MODULE_LICENSE("GPL");
30
31/*
32 * Definitions & global arrays.
33 */
34
35#define TR_FORMAT_TOUCH_BIT 0x01
36#define TR_FORMAT_STATUS_BYTE 0x40
37#define TR_FORMAT_STATUS_MASK ~TR_FORMAT_TOUCH_BIT
38
39#define TR_LENGTH 5
40
41#define TR_MIN_XC 0
42#define TR_MAX_XC 0x1ff
43#define TR_MIN_YC 0
44#define TR_MAX_YC 0x1ff
45
46/*
47 * Per-touchscreen data.
48 */
49
50struct tr {
51 struct input_dev *dev;
52 struct serio *serio;
53 int idx;
54 unsigned char data[TR_LENGTH];
55 char phys[32];
56};
57
58static irqreturn_t tr_interrupt(struct serio *serio,
59 unsigned char data, unsigned int flags)
60{
61 struct tr *tr = serio_get_drvdata(serio);
62 struct input_dev *dev = tr->dev;
63
64 tr->data[tr->idx] = data;
65
66 if ((tr->data[0] & TR_FORMAT_STATUS_MASK) == TR_FORMAT_STATUS_BYTE) {
67 if (++tr->idx == TR_LENGTH) {
68 input_report_abs(dev, ABS_X,
69 (tr->data[1] << 5) | (tr->data[2] >> 1));
70 input_report_abs(dev, ABS_Y,
71 (tr->data[3] << 5) | (tr->data[4] >> 1));
72 input_report_key(dev, BTN_TOUCH,
73 tr->data[0] & TR_FORMAT_TOUCH_BIT);
74 input_sync(dev);
75 tr->idx = 0;
76 }
77 }
78
79 return IRQ_HANDLED;
80}
81
82/*
83 * tr_disconnect() is the opposite of tr_connect()
84 */
85
86static void tr_disconnect(struct serio *serio)
87{
88 struct tr *tr = serio_get_drvdata(serio);
89
90 input_get_device(tr->dev);
91 input_unregister_device(tr->dev);
92 serio_close(serio);
93 serio_set_drvdata(serio, NULL);
94 input_put_device(tr->dev);
95 kfree(tr);
96}
97
98/*
99 * tr_connect() is the routine that is called when someone adds a
100 * new serio device that supports the Touchright protocol and registers it as
101 * an input device.
102 */
103
104static int tr_connect(struct serio *serio, struct serio_driver *drv)
105{
106 struct tr *tr;
107 struct input_dev *input_dev;
108 int err;
109
110 tr = kzalloc(sizeof(struct tr), GFP_KERNEL);
111 input_dev = input_allocate_device();
112 if (!tr || !input_dev) {
113 err = -ENOMEM;
114 goto fail1;
115 }
116
117 tr->serio = serio;
118 tr->dev = input_dev;
119 snprintf(tr->phys, sizeof(tr->phys), "%s/input0", serio->phys);
120
121 input_dev->name = "Touchright Serial TouchScreen";
122 input_dev->phys = tr->phys;
123 input_dev->id.bustype = BUS_RS232;
124 input_dev->id.vendor = SERIO_TOUCHRIGHT;
125 input_dev->id.product = 0;
126 input_dev->id.version = 0x0100;
127 input_dev->dev.parent = &serio->dev;
128 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
129 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
130 input_set_abs_params(tr->dev, ABS_X, TR_MIN_XC, TR_MAX_XC, 0, 0);
131 input_set_abs_params(tr->dev, ABS_Y, TR_MIN_YC, TR_MAX_YC, 0, 0);
132
133 serio_set_drvdata(serio, tr);
134
135 err = serio_open(serio, drv);
136 if (err)
137 goto fail2;
138
139 err = input_register_device(tr->dev);
140 if (err)
141 goto fail3;
142
143 return 0;
144
145 fail3: serio_close(serio);
146 fail2: serio_set_drvdata(serio, NULL);
147 fail1: input_free_device(input_dev);
148 kfree(tr);
149 return err;
150}
151
152/*
153 * The serio driver structure.
154 */
155
156static struct serio_device_id tr_serio_ids[] = {
157 {
158 .type = SERIO_RS232,
159 .proto = SERIO_TOUCHRIGHT,
160 .id = SERIO_ANY,
161 .extra = SERIO_ANY,
162 },
163 { 0 }
164};
165
166MODULE_DEVICE_TABLE(serio, tr_serio_ids);
167
168static struct serio_driver tr_drv = {
169 .driver = {
170 .name = "touchright",
171 },
172 .description = DRIVER_DESC,
173 .id_table = tr_serio_ids,
174 .interrupt = tr_interrupt,
175 .connect = tr_connect,
176 .disconnect = tr_disconnect,
177};
178
179/*
180 * The functions for inserting/removing us as a module.
181 */
182
183static int __init tr_init(void)
184{
185 return serio_register_driver(&tr_drv);
186}
187
188static void __exit tr_exit(void)
189{
190 serio_unregister_driver(&tr_drv);
191}
192
193module_init(tr_init);
194module_exit(tr_exit);
1/*
2 * Touchright serial touchscreen driver
3 *
4 * Copyright (c) 2006 Rick Koch <n1gp@hotmail.com>
5 *
6 * Based on MicroTouch driver (drivers/input/touchscreen/mtouch.c)
7 * Copyright (c) 2004 Vojtech Pavlik
8 * and Dan Streetman <ddstreet@ieee.org>
9 */
10
11/*
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License version 2 as published
14 * by the Free Software Foundation.
15 */
16
17#include <linux/errno.h>
18#include <linux/kernel.h>
19#include <linux/module.h>
20#include <linux/slab.h>
21#include <linux/input.h>
22#include <linux/serio.h>
23
24#define DRIVER_DESC "Touchright serial touchscreen driver"
25
26MODULE_AUTHOR("Rick Koch <n1gp@hotmail.com>");
27MODULE_DESCRIPTION(DRIVER_DESC);
28MODULE_LICENSE("GPL");
29
30/*
31 * Definitions & global arrays.
32 */
33
34#define TR_FORMAT_TOUCH_BIT 0x01
35#define TR_FORMAT_STATUS_BYTE 0x40
36#define TR_FORMAT_STATUS_MASK ~TR_FORMAT_TOUCH_BIT
37
38#define TR_LENGTH 5
39
40#define TR_MIN_XC 0
41#define TR_MAX_XC 0x1ff
42#define TR_MIN_YC 0
43#define TR_MAX_YC 0x1ff
44
45/*
46 * Per-touchscreen data.
47 */
48
49struct tr {
50 struct input_dev *dev;
51 struct serio *serio;
52 int idx;
53 unsigned char data[TR_LENGTH];
54 char phys[32];
55};
56
57static irqreturn_t tr_interrupt(struct serio *serio,
58 unsigned char data, unsigned int flags)
59{
60 struct tr *tr = serio_get_drvdata(serio);
61 struct input_dev *dev = tr->dev;
62
63 tr->data[tr->idx] = data;
64
65 if ((tr->data[0] & TR_FORMAT_STATUS_MASK) == TR_FORMAT_STATUS_BYTE) {
66 if (++tr->idx == TR_LENGTH) {
67 input_report_abs(dev, ABS_X,
68 (tr->data[1] << 5) | (tr->data[2] >> 1));
69 input_report_abs(dev, ABS_Y,
70 (tr->data[3] << 5) | (tr->data[4] >> 1));
71 input_report_key(dev, BTN_TOUCH,
72 tr->data[0] & TR_FORMAT_TOUCH_BIT);
73 input_sync(dev);
74 tr->idx = 0;
75 }
76 }
77
78 return IRQ_HANDLED;
79}
80
81/*
82 * tr_disconnect() is the opposite of tr_connect()
83 */
84
85static void tr_disconnect(struct serio *serio)
86{
87 struct tr *tr = serio_get_drvdata(serio);
88
89 input_get_device(tr->dev);
90 input_unregister_device(tr->dev);
91 serio_close(serio);
92 serio_set_drvdata(serio, NULL);
93 input_put_device(tr->dev);
94 kfree(tr);
95}
96
97/*
98 * tr_connect() is the routine that is called when someone adds a
99 * new serio device that supports the Touchright protocol and registers it as
100 * an input device.
101 */
102
103static int tr_connect(struct serio *serio, struct serio_driver *drv)
104{
105 struct tr *tr;
106 struct input_dev *input_dev;
107 int err;
108
109 tr = kzalloc(sizeof(struct tr), GFP_KERNEL);
110 input_dev = input_allocate_device();
111 if (!tr || !input_dev) {
112 err = -ENOMEM;
113 goto fail1;
114 }
115
116 tr->serio = serio;
117 tr->dev = input_dev;
118 snprintf(tr->phys, sizeof(tr->phys), "%s/input0", serio->phys);
119
120 input_dev->name = "Touchright Serial TouchScreen";
121 input_dev->phys = tr->phys;
122 input_dev->id.bustype = BUS_RS232;
123 input_dev->id.vendor = SERIO_TOUCHRIGHT;
124 input_dev->id.product = 0;
125 input_dev->id.version = 0x0100;
126 input_dev->dev.parent = &serio->dev;
127 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
128 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
129 input_set_abs_params(tr->dev, ABS_X, TR_MIN_XC, TR_MAX_XC, 0, 0);
130 input_set_abs_params(tr->dev, ABS_Y, TR_MIN_YC, TR_MAX_YC, 0, 0);
131
132 serio_set_drvdata(serio, tr);
133
134 err = serio_open(serio, drv);
135 if (err)
136 goto fail2;
137
138 err = input_register_device(tr->dev);
139 if (err)
140 goto fail3;
141
142 return 0;
143
144 fail3: serio_close(serio);
145 fail2: serio_set_drvdata(serio, NULL);
146 fail1: input_free_device(input_dev);
147 kfree(tr);
148 return err;
149}
150
151/*
152 * The serio driver structure.
153 */
154
155static struct serio_device_id tr_serio_ids[] = {
156 {
157 .type = SERIO_RS232,
158 .proto = SERIO_TOUCHRIGHT,
159 .id = SERIO_ANY,
160 .extra = SERIO_ANY,
161 },
162 { 0 }
163};
164
165MODULE_DEVICE_TABLE(serio, tr_serio_ids);
166
167static struct serio_driver tr_drv = {
168 .driver = {
169 .name = "touchright",
170 },
171 .description = DRIVER_DESC,
172 .id_table = tr_serio_ids,
173 .interrupt = tr_interrupt,
174 .connect = tr_connect,
175 .disconnect = tr_disconnect,
176};
177
178module_serio_driver(tr_drv);