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1/*
2 * Dynapro serial touchscreen driver
3 *
4 * Copyright (c) 2009 Tias Guns
5 * Based on the inexio driver (c) Vojtech Pavlik and Dan Streetman and
6 * Richard Lemon
7 *
8 */
9
10/*
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License version 2 as published by
13 * the Free Software Foundation.
14 */
15
16/*
17 * 2009/09/19 Tias Guns <tias@ulyssis.org>
18 * Copied inexio.c and edited for Dynapro protocol (from retired Xorg module)
19 */
20
21#include <linux/errno.h>
22#include <linux/kernel.h>
23#include <linux/module.h>
24#include <linux/slab.h>
25#include <linux/input.h>
26#include <linux/serio.h>
27#include <linux/init.h>
28
29#define DRIVER_DESC "Dynapro serial touchscreen driver"
30
31MODULE_AUTHOR("Tias Guns <tias@ulyssis.org>");
32MODULE_DESCRIPTION(DRIVER_DESC);
33MODULE_LICENSE("GPL");
34
35/*
36 * Definitions & global arrays.
37 */
38
39#define DYNAPRO_FORMAT_TOUCH_BIT 0x40
40#define DYNAPRO_FORMAT_LENGTH 3
41#define DYNAPRO_RESPONSE_BEGIN_BYTE 0x80
42
43#define DYNAPRO_MIN_XC 0
44#define DYNAPRO_MAX_XC 0x3ff
45#define DYNAPRO_MIN_YC 0
46#define DYNAPRO_MAX_YC 0x3ff
47
48#define DYNAPRO_GET_XC(data) (data[1] | ((data[0] & 0x38) << 4))
49#define DYNAPRO_GET_YC(data) (data[2] | ((data[0] & 0x07) << 7))
50#define DYNAPRO_GET_TOUCHED(data) (DYNAPRO_FORMAT_TOUCH_BIT & data[0])
51
52/*
53 * Per-touchscreen data.
54 */
55
56struct dynapro {
57 struct input_dev *dev;
58 struct serio *serio;
59 int idx;
60 unsigned char data[DYNAPRO_FORMAT_LENGTH];
61 char phys[32];
62};
63
64static void dynapro_process_data(struct dynapro *pdynapro)
65{
66 struct input_dev *dev = pdynapro->dev;
67
68 if (DYNAPRO_FORMAT_LENGTH == ++pdynapro->idx) {
69 input_report_abs(dev, ABS_X, DYNAPRO_GET_XC(pdynapro->data));
70 input_report_abs(dev, ABS_Y, DYNAPRO_GET_YC(pdynapro->data));
71 input_report_key(dev, BTN_TOUCH,
72 DYNAPRO_GET_TOUCHED(pdynapro->data));
73 input_sync(dev);
74
75 pdynapro->idx = 0;
76 }
77}
78
79static irqreturn_t dynapro_interrupt(struct serio *serio,
80 unsigned char data, unsigned int flags)
81{
82 struct dynapro *pdynapro = serio_get_drvdata(serio);
83
84 pdynapro->data[pdynapro->idx] = data;
85
86 if (DYNAPRO_RESPONSE_BEGIN_BYTE & pdynapro->data[0])
87 dynapro_process_data(pdynapro);
88 else
89 dev_dbg(&serio->dev, "unknown/unsynchronized data: %x\n",
90 pdynapro->data[0]);
91
92 return IRQ_HANDLED;
93}
94
95static void dynapro_disconnect(struct serio *serio)
96{
97 struct dynapro *pdynapro = serio_get_drvdata(serio);
98
99 input_get_device(pdynapro->dev);
100 input_unregister_device(pdynapro->dev);
101 serio_close(serio);
102 serio_set_drvdata(serio, NULL);
103 input_put_device(pdynapro->dev);
104 kfree(pdynapro);
105}
106
107/*
108 * dynapro_connect() is the routine that is called when someone adds a
109 * new serio device that supports dynapro protocol and registers it as
110 * an input device. This is usually accomplished using inputattach.
111 */
112
113static int dynapro_connect(struct serio *serio, struct serio_driver *drv)
114{
115 struct dynapro *pdynapro;
116 struct input_dev *input_dev;
117 int err;
118
119 pdynapro = kzalloc(sizeof(struct dynapro), GFP_KERNEL);
120 input_dev = input_allocate_device();
121 if (!pdynapro || !input_dev) {
122 err = -ENOMEM;
123 goto fail1;
124 }
125
126 pdynapro->serio = serio;
127 pdynapro->dev = input_dev;
128 snprintf(pdynapro->phys, sizeof(pdynapro->phys),
129 "%s/input0", serio->phys);
130
131 input_dev->name = "Dynapro Serial TouchScreen";
132 input_dev->phys = pdynapro->phys;
133 input_dev->id.bustype = BUS_RS232;
134 input_dev->id.vendor = SERIO_DYNAPRO;
135 input_dev->id.product = 0;
136 input_dev->id.version = 0x0001;
137 input_dev->dev.parent = &serio->dev;
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);
140 input_set_abs_params(pdynapro->dev, ABS_X,
141 DYNAPRO_MIN_XC, DYNAPRO_MAX_XC, 0, 0);
142 input_set_abs_params(pdynapro->dev, ABS_Y,
143 DYNAPRO_MIN_YC, DYNAPRO_MAX_YC, 0, 0);
144
145 serio_set_drvdata(serio, pdynapro);
146
147 err = serio_open(serio, drv);
148 if (err)
149 goto fail2;
150
151 err = input_register_device(pdynapro->dev);
152 if (err)
153 goto fail3;
154
155 return 0;
156
157 fail3: serio_close(serio);
158 fail2: serio_set_drvdata(serio, NULL);
159 fail1: input_free_device(input_dev);
160 kfree(pdynapro);
161 return err;
162}
163
164/*
165 * The serio driver structure.
166 */
167
168static struct serio_device_id dynapro_serio_ids[] = {
169 {
170 .type = SERIO_RS232,
171 .proto = SERIO_DYNAPRO,
172 .id = SERIO_ANY,
173 .extra = SERIO_ANY,
174 },
175 { 0 }
176};
177
178MODULE_DEVICE_TABLE(serio, dynapro_serio_ids);
179
180static struct serio_driver dynapro_drv = {
181 .driver = {
182 .name = "dynapro",
183 },
184 .description = DRIVER_DESC,
185 .id_table = dynapro_serio_ids,
186 .interrupt = dynapro_interrupt,
187 .connect = dynapro_connect,
188 .disconnect = dynapro_disconnect,
189};
190
191/*
192 * The functions for inserting/removing us as a module.
193 */
194
195static int __init dynapro_init(void)
196{
197 return serio_register_driver(&dynapro_drv);
198}
199
200static void __exit dynapro_exit(void)
201{
202 serio_unregister_driver(&dynapro_drv);
203}
204
205module_init(dynapro_init);
206module_exit(dynapro_exit);
1/*
2 * Dynapro serial touchscreen driver
3 *
4 * Copyright (c) 2009 Tias Guns
5 * Based on the inexio driver (c) Vojtech Pavlik and Dan Streetman and
6 * Richard Lemon
7 *
8 */
9
10/*
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License version 2 as published by
13 * the Free Software Foundation.
14 */
15
16/*
17 * 2009/09/19 Tias Guns <tias@ulyssis.org>
18 * Copied inexio.c and edited for Dynapro protocol (from retired Xorg module)
19 */
20
21#include <linux/errno.h>
22#include <linux/kernel.h>
23#include <linux/module.h>
24#include <linux/slab.h>
25#include <linux/input.h>
26#include <linux/serio.h>
27
28#define DRIVER_DESC "Dynapro serial touchscreen driver"
29
30MODULE_AUTHOR("Tias Guns <tias@ulyssis.org>");
31MODULE_DESCRIPTION(DRIVER_DESC);
32MODULE_LICENSE("GPL");
33
34/*
35 * Definitions & global arrays.
36 */
37
38#define DYNAPRO_FORMAT_TOUCH_BIT 0x40
39#define DYNAPRO_FORMAT_LENGTH 3
40#define DYNAPRO_RESPONSE_BEGIN_BYTE 0x80
41
42#define DYNAPRO_MIN_XC 0
43#define DYNAPRO_MAX_XC 0x3ff
44#define DYNAPRO_MIN_YC 0
45#define DYNAPRO_MAX_YC 0x3ff
46
47#define DYNAPRO_GET_XC(data) (data[1] | ((data[0] & 0x38) << 4))
48#define DYNAPRO_GET_YC(data) (data[2] | ((data[0] & 0x07) << 7))
49#define DYNAPRO_GET_TOUCHED(data) (DYNAPRO_FORMAT_TOUCH_BIT & data[0])
50
51/*
52 * Per-touchscreen data.
53 */
54
55struct dynapro {
56 struct input_dev *dev;
57 struct serio *serio;
58 int idx;
59 unsigned char data[DYNAPRO_FORMAT_LENGTH];
60 char phys[32];
61};
62
63static void dynapro_process_data(struct dynapro *pdynapro)
64{
65 struct input_dev *dev = pdynapro->dev;
66
67 if (DYNAPRO_FORMAT_LENGTH == ++pdynapro->idx) {
68 input_report_abs(dev, ABS_X, DYNAPRO_GET_XC(pdynapro->data));
69 input_report_abs(dev, ABS_Y, DYNAPRO_GET_YC(pdynapro->data));
70 input_report_key(dev, BTN_TOUCH,
71 DYNAPRO_GET_TOUCHED(pdynapro->data));
72 input_sync(dev);
73
74 pdynapro->idx = 0;
75 }
76}
77
78static irqreturn_t dynapro_interrupt(struct serio *serio,
79 unsigned char data, unsigned int flags)
80{
81 struct dynapro *pdynapro = serio_get_drvdata(serio);
82
83 pdynapro->data[pdynapro->idx] = data;
84
85 if (DYNAPRO_RESPONSE_BEGIN_BYTE & pdynapro->data[0])
86 dynapro_process_data(pdynapro);
87 else
88 dev_dbg(&serio->dev, "unknown/unsynchronized data: %x\n",
89 pdynapro->data[0]);
90
91 return IRQ_HANDLED;
92}
93
94static void dynapro_disconnect(struct serio *serio)
95{
96 struct dynapro *pdynapro = serio_get_drvdata(serio);
97
98 input_get_device(pdynapro->dev);
99 input_unregister_device(pdynapro->dev);
100 serio_close(serio);
101 serio_set_drvdata(serio, NULL);
102 input_put_device(pdynapro->dev);
103 kfree(pdynapro);
104}
105
106/*
107 * dynapro_connect() is the routine that is called when someone adds a
108 * new serio device that supports dynapro protocol and registers it as
109 * an input device. This is usually accomplished using inputattach.
110 */
111
112static int dynapro_connect(struct serio *serio, struct serio_driver *drv)
113{
114 struct dynapro *pdynapro;
115 struct input_dev *input_dev;
116 int err;
117
118 pdynapro = kzalloc(sizeof(struct dynapro), GFP_KERNEL);
119 input_dev = input_allocate_device();
120 if (!pdynapro || !input_dev) {
121 err = -ENOMEM;
122 goto fail1;
123 }
124
125 pdynapro->serio = serio;
126 pdynapro->dev = input_dev;
127 snprintf(pdynapro->phys, sizeof(pdynapro->phys),
128 "%s/input0", serio->phys);
129
130 input_dev->name = "Dynapro Serial TouchScreen";
131 input_dev->phys = pdynapro->phys;
132 input_dev->id.bustype = BUS_RS232;
133 input_dev->id.vendor = SERIO_DYNAPRO;
134 input_dev->id.product = 0;
135 input_dev->id.version = 0x0001;
136 input_dev->dev.parent = &serio->dev;
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);
139 input_set_abs_params(pdynapro->dev, ABS_X,
140 DYNAPRO_MIN_XC, DYNAPRO_MAX_XC, 0, 0);
141 input_set_abs_params(pdynapro->dev, ABS_Y,
142 DYNAPRO_MIN_YC, DYNAPRO_MAX_YC, 0, 0);
143
144 serio_set_drvdata(serio, pdynapro);
145
146 err = serio_open(serio, drv);
147 if (err)
148 goto fail2;
149
150 err = input_register_device(pdynapro->dev);
151 if (err)
152 goto fail3;
153
154 return 0;
155
156 fail3: serio_close(serio);
157 fail2: serio_set_drvdata(serio, NULL);
158 fail1: input_free_device(input_dev);
159 kfree(pdynapro);
160 return err;
161}
162
163/*
164 * The serio driver structure.
165 */
166
167static struct serio_device_id dynapro_serio_ids[] = {
168 {
169 .type = SERIO_RS232,
170 .proto = SERIO_DYNAPRO,
171 .id = SERIO_ANY,
172 .extra = SERIO_ANY,
173 },
174 { 0 }
175};
176
177MODULE_DEVICE_TABLE(serio, dynapro_serio_ids);
178
179static struct serio_driver dynapro_drv = {
180 .driver = {
181 .name = "dynapro",
182 },
183 .description = DRIVER_DESC,
184 .id_table = dynapro_serio_ids,
185 .interrupt = dynapro_interrupt,
186 .connect = dynapro_connect,
187 .disconnect = dynapro_disconnect,
188};
189
190module_serio_driver(dynapro_drv);