cobalt_btns.c (d0a0515fc30b55d4b09395d44762c5f41d6d02d5) cobalt_btns.c (3d29cdff999c37b3876082278a8134a0642a02cd)
1/*
2 * Cobalt button interface driver.
3 *
4 * Copyright (C) 2007 Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or

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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20#include <linux/init.h>
1/*
2 * Cobalt button interface driver.
3 *
4 * Copyright (C) 2007 Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or

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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20#include <linux/init.h>
21#include <linux/input.h>
21#include <linux/input-polldev.h>
22#include <linux/ioport.h>
23#include <linux/module.h>
24#include <linux/platform_device.h>
22#include <linux/ioport.h>
23#include <linux/module.h>
24#include <linux/platform_device.h>
25#include <linux/jiffies.h>
26#include <linux/timer.h>
27
28#define BUTTONS_POLL_INTERVAL 30 /* msec */
29#define BUTTONS_COUNT_THRESHOLD 3
30#define BUTTONS_STATUS_MASK 0xfe000000
31
32struct buttons_dev {
25
26#define BUTTONS_POLL_INTERVAL 30 /* msec */
27#define BUTTONS_COUNT_THRESHOLD 3
28#define BUTTONS_STATUS_MASK 0xfe000000
29
30struct buttons_dev {
33 struct input_dev *input;
31 struct input_polled_dev *poll_dev;
34 void __iomem *reg;
35};
36
37struct buttons_map {
38 uint32_t mask;
39 int keycode;
40 int count;
41};
42
43static struct buttons_map buttons_map[] = {
44 { 0x02000000, KEY_RESTART, },
45 { 0x04000000, KEY_LEFT, },
46 { 0x08000000, KEY_UP, },
47 { 0x10000000, KEY_DOWN, },
48 { 0x20000000, KEY_RIGHT, },
49 { 0x40000000, KEY_ENTER, },
50 { 0x80000000, KEY_SELECT, },
51};
52
32 void __iomem *reg;
33};
34
35struct buttons_map {
36 uint32_t mask;
37 int keycode;
38 int count;
39};
40
41static struct buttons_map buttons_map[] = {
42 { 0x02000000, KEY_RESTART, },
43 { 0x04000000, KEY_LEFT, },
44 { 0x08000000, KEY_UP, },
45 { 0x10000000, KEY_DOWN, },
46 { 0x20000000, KEY_RIGHT, },
47 { 0x40000000, KEY_ENTER, },
48 { 0x80000000, KEY_SELECT, },
49};
50
53static struct timer_list buttons_timer;
54
55static void handle_buttons(unsigned long data)
51static void handle_buttons(struct input_polled_dev *dev)
56{
57 struct buttons_map *button = buttons_map;
52{
53 struct buttons_map *button = buttons_map;
58 struct buttons_dev *bdev;
54 struct buttons_dev *bdev = dev->private;
55 struct input_dev *input = dev->input;
59 uint32_t status;
60 int i;
61
56 uint32_t status;
57 int i;
58
62 bdev = (struct buttons_dev *)data;
63 status = readl(bdev->reg);
64 status = ~status & BUTTONS_STATUS_MASK;
65
66 for (i = 0; i < ARRAY_SIZE(buttons_map); i++) {
67 if (status & button->mask) {
68 button->count++;
69 } else {
70 if (button->count >= BUTTONS_COUNT_THRESHOLD) {
59 status = readl(bdev->reg);
60 status = ~status & BUTTONS_STATUS_MASK;
61
62 for (i = 0; i < ARRAY_SIZE(buttons_map); i++) {
63 if (status & button->mask) {
64 button->count++;
65 } else {
66 if (button->count >= BUTTONS_COUNT_THRESHOLD) {
71 input_report_key(bdev->input, button->keycode, 0);
72 input_sync(bdev->input);
67 input_report_key(input, button->keycode, 0);
68 input_sync(input);
73 }
74 button->count = 0;
75 }
76
77 if (button->count == BUTTONS_COUNT_THRESHOLD) {
69 }
70 button->count = 0;
71 }
72
73 if (button->count == BUTTONS_COUNT_THRESHOLD) {
78 input_report_key(bdev->input, button->keycode, 1);
79 input_sync(bdev->input);
74 input_report_key(input, button->keycode, 1);
75 input_sync(input);
80 }
81
82 button++;
83 }
76 }
77
78 button++;
79 }
84
85 mod_timer(&buttons_timer, jiffies + msecs_to_jiffies(BUTTONS_POLL_INTERVAL));
86}
87
80}
81
88static int cobalt_buttons_open(struct input_dev *dev)
89{
90 mod_timer(&buttons_timer, jiffies + msecs_to_jiffies(BUTTONS_POLL_INTERVAL));
91
92 return 0;
93}
94
95static void cobalt_buttons_close(struct input_dev *dev)
96{
97 del_timer_sync(&buttons_timer);
98}
99
100static int __devinit cobalt_buttons_probe(struct platform_device *pdev)
101{
102 struct buttons_dev *bdev;
82static int __devinit cobalt_buttons_probe(struct platform_device *pdev)
83{
84 struct buttons_dev *bdev;
85 struct input_polled_dev *poll_dev;
103 struct input_dev *input;
104 struct resource *res;
105 int error, i;
106
107 bdev = kzalloc(sizeof(struct buttons_dev), GFP_KERNEL);
86 struct input_dev *input;
87 struct resource *res;
88 int error, i;
89
90 bdev = kzalloc(sizeof(struct buttons_dev), GFP_KERNEL);
108 input = input_allocate_device();
109 if (!bdev || !input) {
91 poll_dev = input_allocate_polled_device();
92 if (!bdev || !poll_dev) {
110 error = -ENOMEM;
111 goto err_free_mem;
112 }
113
93 error = -ENOMEM;
94 goto err_free_mem;
95 }
96
97 poll_dev->private = bdev;
98 poll_dev->poll = handle_buttons;
99 poll_dev->poll_interval = BUTTONS_POLL_INTERVAL;
100
101 input = poll_dev->input;
114 input->name = "Cobalt buttons";
115 input->phys = "cobalt/input0";
116 input->id.bustype = BUS_HOST;
117 input->cdev.dev = &pdev->dev;
102 input->name = "Cobalt buttons";
103 input->phys = "cobalt/input0";
104 input->id.bustype = BUS_HOST;
105 input->cdev.dev = &pdev->dev;
118 input->open = cobalt_buttons_open;
119 input->close = cobalt_buttons_close;
120
121 input->evbit[0] = BIT(EV_KEY);
122 for (i = 0; i < ARRAY_SIZE(buttons_map); i++) {
123 set_bit(buttons_map[i].keycode, input->keybit);
124 buttons_map[i].count = 0;
125 }
126
127 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
128 if (!res) {
129 error = -EBUSY;
130 goto err_free_mem;
131 }
132
106
107 input->evbit[0] = BIT(EV_KEY);
108 for (i = 0; i < ARRAY_SIZE(buttons_map); i++) {
109 set_bit(buttons_map[i].keycode, input->keybit);
110 buttons_map[i].count = 0;
111 }
112
113 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
114 if (!res) {
115 error = -EBUSY;
116 goto err_free_mem;
117 }
118
133 bdev->input = input;
119 bdev->poll_dev = poll_dev;
134 bdev->reg = ioremap(res->start, res->end - res->start + 1);
135 dev_set_drvdata(&pdev->dev, bdev);
136
120 bdev->reg = ioremap(res->start, res->end - res->start + 1);
121 dev_set_drvdata(&pdev->dev, bdev);
122
137 setup_timer(&buttons_timer, handle_buttons, (unsigned long)bdev);
138
139 error = input_register_device(input);
123 error = input_register_polled_device(poll_dev);
140 if (error)
141 goto err_iounmap;
142
143 return 0;
144
145 err_iounmap:
146 iounmap(bdev->reg);
147 err_free_mem:
124 if (error)
125 goto err_iounmap;
126
127 return 0;
128
129 err_iounmap:
130 iounmap(bdev->reg);
131 err_free_mem:
148 input_free_device(input);
132 input_free_polled_device(poll_dev);
149 kfree(bdev);
150 dev_set_drvdata(&pdev->dev, NULL);
151 return error;
152}
153
154static int __devexit cobalt_buttons_remove(struct platform_device *pdev)
155{
156 struct device *dev = &pdev->dev;
157 struct buttons_dev *bdev = dev_get_drvdata(dev);
158
133 kfree(bdev);
134 dev_set_drvdata(&pdev->dev, NULL);
135 return error;
136}
137
138static int __devexit cobalt_buttons_remove(struct platform_device *pdev)
139{
140 struct device *dev = &pdev->dev;
141 struct buttons_dev *bdev = dev_get_drvdata(dev);
142
159 input_unregister_device(bdev->input);
143 input_unregister_polled_device(bdev->poll_dev);
144 input_free_polled_device(bdev->poll_dev);
160 iounmap(bdev->reg);
161 kfree(bdev);
162 dev_set_drvdata(dev, NULL);
163
164 return 0;
165}
166
167static struct platform_driver cobalt_buttons_driver = {

--- 20 unchanged lines hidden --- 		145 iounmap(bdev->reg);
146 kfree(bdev);
147 dev_set_drvdata(dev, NULL);
148
149 return 0;
150}
151
152static struct platform_driver cobalt_buttons_driver = {

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