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1/*
2 * Penmount serial touchscreen driver
3 *
4 * Copyright (c) 2006 Rick Koch <n1gp@hotmail.com>
5 *
6 * Based on ELO driver (drivers/input/touchscreen/elo.c)
7 * Copyright (c) 2004 Vojtech Pavlik
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
13 * by the Free Software Foundation.
14 */
15
16#include <linux/errno.h>
17#include <linux/kernel.h>
18#include <linux/module.h>
19#include <linux/slab.h>
20#include <linux/input.h>
21#include <linux/serio.h>
22#include <linux/init.h>
23
24#define DRIVER_DESC "Penmount 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 PM_MAX_LENGTH 5
35
36/*
37 * Per-touchscreen data.
38 */
39
40struct pm {
41 struct input_dev *dev;
42 struct serio *serio;
43 int idx;
44 unsigned char data[PM_MAX_LENGTH];
45 char phys[32];
46};
47
48static irqreturn_t pm_interrupt(struct serio *serio,
49 unsigned char data, unsigned int flags)
50{
51 struct pm *pm = serio_get_drvdata(serio);
52 struct input_dev *dev = pm->dev;
53
54 pm->data[pm->idx] = data;
55
56 if (pm->data[0] & 0x80) {
57 if (PM_MAX_LENGTH == ++pm->idx) {
58 input_report_abs(dev, ABS_X, pm->data[2] * 128 + pm->data[1]);
59 input_report_abs(dev, ABS_Y, pm->data[4] * 128 + pm->data[3]);
60 input_report_key(dev, BTN_TOUCH, !!(pm->data[0] & 0x40));
61 input_sync(dev);
62 pm->idx = 0;
63 }
64 }
65
66 return IRQ_HANDLED;
67}
68
69/*
70 * pm_disconnect() is the opposite of pm_connect()
71 */
72
73static void pm_disconnect(struct serio *serio)
74{
75 struct pm *pm = serio_get_drvdata(serio);
76
77 input_get_device(pm->dev);
78 input_unregister_device(pm->dev);
79 serio_close(serio);
80 serio_set_drvdata(serio, NULL);
81 input_put_device(pm->dev);
82 kfree(pm);
83}
84
85/*
86 * pm_connect() is the routine that is called when someone adds a
87 * new serio device that supports Gunze protocol and registers it as
88 * an input device.
89 */
90
91static int pm_connect(struct serio *serio, struct serio_driver *drv)
92{
93 struct pm *pm;
94 struct input_dev *input_dev;
95 int err;
96
97 pm = kzalloc(sizeof(struct pm), GFP_KERNEL);
98 input_dev = input_allocate_device();
99 if (!pm || !input_dev) {
100 err = -ENOMEM;
101 goto fail1;
102 }
103
104 pm->serio = serio;
105 pm->dev = input_dev;
106 snprintf(pm->phys, sizeof(pm->phys), "%s/input0", serio->phys);
107
108 input_dev->name = "Penmount Serial TouchScreen";
109 input_dev->phys = pm->phys;
110 input_dev->id.bustype = BUS_RS232;
111 input_dev->id.vendor = SERIO_PENMOUNT;
112 input_dev->id.product = 0;
113 input_dev->id.version = 0x0100;
114 input_dev->dev.parent = &serio->dev;
115
116 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
117 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
118 input_set_abs_params(pm->dev, ABS_X, 0, 0x3ff, 0, 0);
119 input_set_abs_params(pm->dev, ABS_Y, 0, 0x3ff, 0, 0);
120
121 serio_set_drvdata(serio, pm);
122
123 err = serio_open(serio, drv);
124 if (err)
125 goto fail2;
126
127 err = input_register_device(pm->dev);
128 if (err)
129 goto fail3;
130
131 return 0;
132
133 fail3: serio_close(serio);
134 fail2: serio_set_drvdata(serio, NULL);
135 fail1: input_free_device(input_dev);
136 kfree(pm);
137 return err;
138}
139
140/*
141 * The serio driver structure.
142 */
143
144static struct serio_device_id pm_serio_ids[] = {
145 {
146 .type = SERIO_RS232,
147 .proto = SERIO_PENMOUNT,
148 .id = SERIO_ANY,
149 .extra = SERIO_ANY,
150 },
151 { 0 }
152};
153
154MODULE_DEVICE_TABLE(serio, pm_serio_ids);
155
156static struct serio_driver pm_drv = {
157 .driver = {
158 .name = "penmountlpc",
159 },
160 .description = DRIVER_DESC,
161 .id_table = pm_serio_ids,
162 .interrupt = pm_interrupt,
163 .connect = pm_connect,
164 .disconnect = pm_disconnect,
165};
166
167/*
168 * The functions for inserting/removing us as a module.
169 */
170
171static int __init pm_init(void)
172{
173 return serio_register_driver(&pm_drv);
174}
175
176static void __exit pm_exit(void)
177{
178 serio_unregister_driver(&pm_drv);
179}
180
181module_init(pm_init);
182module_exit(pm_exit);
1/*
2 * Penmount serial touchscreen driver
3 *
4 * Copyright (c) 2006 Rick Koch <n1gp@hotmail.com>
5 *
6 * Based on ELO driver (drivers/input/touchscreen/elo.c)
7 * Copyright (c) 2004 Vojtech Pavlik
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
13 * by the Free Software Foundation.
14 */
15
16#include <linux/errno.h>
17#include <linux/kernel.h>
18#include <linux/module.h>
19#include <linux/slab.h>
20#include <linux/input.h>
21#include <linux/serio.h>
22#include <linux/init.h>
23
24#define DRIVER_DESC "Penmount 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 PM_MAX_LENGTH 5
35
36/*
37 * Per-touchscreen data.
38 */
39
40struct pm {
41 struct input_dev *dev;
42 struct serio *serio;
43 int idx;
44 unsigned char data[PM_MAX_LENGTH];
45 char phys[32];
46};
47
48static irqreturn_t pm_interrupt(struct serio *serio,
49 unsigned char data, unsigned int flags)
50{
51 struct pm *pm = serio_get_drvdata(serio);
52 struct input_dev *dev = pm->dev;
53
54 pm->data[pm->idx] = data;
55
56 if (pm->data[0] & 0x80) {
57 if (PM_MAX_LENGTH == ++pm->idx) {
58 input_report_abs(dev, ABS_X, pm->data[2] * 128 + pm->data[1]);
59 input_report_abs(dev, ABS_Y, pm->data[4] * 128 + pm->data[3]);
60 input_report_key(dev, BTN_TOUCH, !!(pm->data[0] & 0x40));
61 input_sync(dev);
62 pm->idx = 0;
63 }
64 }
65
66 return IRQ_HANDLED;
67}
68
69/*
70 * pm_disconnect() is the opposite of pm_connect()
71 */
72
73static void pm_disconnect(struct serio *serio)
74{
75 struct pm *pm = serio_get_drvdata(serio);
76
77 input_get_device(pm->dev);
78 input_unregister_device(pm->dev);
79 serio_close(serio);
80 serio_set_drvdata(serio, NULL);
81 input_put_device(pm->dev);
82 kfree(pm);
83}
84
85/*
86 * pm_connect() is the routine that is called when someone adds a
87 * new serio device that supports Gunze protocol and registers it as
88 * an input device.
89 */
90
91static int pm_connect(struct serio *serio, struct serio_driver *drv)
92{
93 struct pm *pm;
94 struct input_dev *input_dev;
95 int err;
96
97 pm = kzalloc(sizeof(struct pm), GFP_KERNEL);
98 input_dev = input_allocate_device();
99 if (!pm || !input_dev) {
100 err = -ENOMEM;
101 goto fail1;
102 }
103
104 pm->serio = serio;
105 pm->dev = input_dev;
106 snprintf(pm->phys, sizeof(pm->phys), "%s/input0", serio->phys);
107
108 input_dev->name = "Penmount Serial TouchScreen";
109 input_dev->phys = pm->phys;
110 input_dev->id.bustype = BUS_RS232;
111 input_dev->id.vendor = SERIO_PENMOUNT;
112 input_dev->id.product = 0;
113 input_dev->id.version = 0x0100;
114 input_dev->dev.parent = &serio->dev;
115
116 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
117 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
118 input_set_abs_params(pm->dev, ABS_X, 0, 0x3ff, 0, 0);
119 input_set_abs_params(pm->dev, ABS_Y, 0, 0x3ff, 0, 0);
120
121 serio_set_drvdata(serio, pm);
122
123 err = serio_open(serio, drv);
124 if (err)
125 goto fail2;
126
127 err = input_register_device(pm->dev);
128 if (err)
129 goto fail3;
130
131 return 0;
132
133 fail3: serio_close(serio);
134 fail2: serio_set_drvdata(serio, NULL);
135 fail1: input_free_device(input_dev);
136 kfree(pm);
137 return err;
138}
139
140/*
141 * The serio driver structure.
142 */
143
144static struct serio_device_id pm_serio_ids[] = {
145 {
146 .type = SERIO_RS232,
147 .proto = SERIO_PENMOUNT,
148 .id = SERIO_ANY,
149 .extra = SERIO_ANY,
150 },
151 { 0 }
152};
153
154MODULE_DEVICE_TABLE(serio, pm_serio_ids);
155
156static struct serio_driver pm_drv = {
157 .driver = {
158 .name = "penmountlpc",
159 },
160 .description = DRIVER_DESC,
161 .id_table = pm_serio_ids,
162 .interrupt = pm_interrupt,
163 .connect = pm_connect,
164 .disconnect = pm_disconnect,
165};
166
167/*
168 * The functions for inserting/removing us as a module.
169 */
170
171static int __init pm_init(void)
172{
173 return serio_register_driver(&pm_drv);
174}
175
176static void __exit pm_exit(void)
177{
178 serio_unregister_driver(&pm_drv);
179}
180
181module_init(pm_init);
182module_exit(pm_exit);