1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
|
/*
* Copyright (c) 2008-2009 Nuvoton technology corporation.
*
* Wan ZongShun <mcuos.com@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation;version 2 of the License.
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/input.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/platform_data/keypad-w90p910.h>
/* Keypad Interface Control Registers */
#define KPI_CONF 0x00
#define KPI_3KCONF 0x04
#define KPI_LPCONF 0x08
#define KPI_STATUS 0x0C
#define IS1KEY (0x01 << 16)
#define INTTR (0x01 << 21)
#define KEY0R (0x0f << 3)
#define KEY0C 0x07
#define DEBOUNCE_BIT 0x08
#define KSIZE0 (0x01 << 16)
#define KSIZE1 (0x01 << 17)
#define KPSEL (0x01 << 19)
#define ENKP (0x01 << 18)
#define KGET_RAW(n) (((n) & KEY0R) >> 3)
#define KGET_COLUMN(n) ((n) & KEY0C)
#define W90P910_NUM_ROWS 8
#define W90P910_NUM_COLS 8
#define W90P910_ROW_SHIFT 3
struct w90p910_keypad {
const struct w90p910_keypad_platform_data *pdata;
struct clk *clk;
struct input_dev *input_dev;
void __iomem *mmio_base;
int irq;
unsigned short keymap[W90P910_NUM_ROWS * W90P910_NUM_COLS];
};
static void w90p910_keypad_scan_matrix(struct w90p910_keypad *keypad,
unsigned int status)
{
struct input_dev *input_dev = keypad->input_dev;
unsigned int row = KGET_RAW(status);
unsigned int col = KGET_COLUMN(status);
unsigned int code = MATRIX_SCAN_CODE(row, col, W90P910_ROW_SHIFT);
unsigned int key = keypad->keymap[code];
input_event(input_dev, EV_MSC, MSC_SCAN, code);
input_report_key(input_dev, key, 1);
input_sync(input_dev);
input_event(input_dev, EV_MSC, MSC_SCAN, code);
input_report_key(input_dev, key, 0);
input_sync(input_dev);
}
static irqreturn_t w90p910_keypad_irq_handler(int irq, void *dev_id)
{
struct w90p910_keypad *keypad = dev_id;
unsigned int kstatus, val;
kstatus = __raw_readl(keypad->mmio_base + KPI_STATUS);
val = INTTR | IS1KEY;
if (kstatus & val)
w90p910_keypad_scan_matrix(keypad, kstatus);
return IRQ_HANDLED;
}
static int w90p910_keypad_open(struct input_dev *dev)
{
struct w90p910_keypad *keypad = input_get_drvdata(dev);
const struct w90p910_keypad_platform_data *pdata = keypad->pdata;
unsigned int val, config;
/* Enable unit clock */
clk_enable(keypad->clk);
val = __raw_readl(keypad->mmio_base + KPI_CONF);
val |= (KPSEL | ENKP);
val &= ~(KSIZE0 | KSIZE1);
config = pdata->prescale | (pdata->debounce << DEBOUNCE_BIT);
val |= config;
__raw_writel(val, keypad->mmio_base + KPI_CONF);
return 0;
}
static void w90p910_keypad_close(struct input_dev *dev)
{
struct w90p910_keypad *keypad = input_get_drvdata(dev);
/* Disable clock unit */
clk_disable(keypad->clk);
}
static int __devinit w90p910_keypad_probe(struct platform_device *pdev)
{
const struct w90p910_keypad_platform_data *pdata =
pdev->dev.platform_data;
const struct matrix_keymap_data *keymap_data;
struct w90p910_keypad *keypad;
struct input_dev *input_dev;
struct resource *res;
int irq;
int error;
if (!pdata) {
dev_err(&pdev->dev, "no platform data defined\n");
return -EINVAL;
}
keymap_data = pdata->keymap_data;
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "failed to get keypad irq\n");
return -ENXIO;
}
keypad = kzalloc(sizeof(struct w90p910_keypad), GFP_KERNEL);
input_dev = input_allocate_device();
if (!keypad || !input_dev) {
dev_err(&pdev->dev, "failed to allocate driver data\n");
error = -ENOMEM;
goto failed_free;
}
keypad->pdata = pdata;
keypad->input_dev = input_dev;
keypad->irq = irq;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res == NULL) {
dev_err(&pdev->dev, "failed to get I/O memory\n");
error = -ENXIO;
goto failed_free;
}
res = request_mem_region(res->start, resource_size(res), pdev->name);
if (res == NULL) {
dev_err(&pdev->dev, "failed to request I/O memory\n");
error = -EBUSY;
goto failed_free;
}
keypad->mmio_base = ioremap(res->start, resource_size(res));
if (keypad->mmio_base == NULL) {
dev_err(&pdev->dev, "failed to remap I/O memory\n");
error = -ENXIO;
goto failed_free_res;
}
keypad->clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(keypad->clk)) {
dev_err(&pdev->dev, "failed to get keypad clock\n");
error = PTR_ERR(keypad->clk);
goto failed_free_io;
}
/* set multi-function pin for w90p910 kpi. */
mfp_set_groupi(&pdev->dev);
input_dev->name = pdev->name;
input_dev->id.bustype = BUS_HOST;
input_dev->open = w90p910_keypad_open;
input_dev->close = w90p910_keypad_close;
input_dev->dev.parent = &pdev->dev;
error = matrix_keypad_build_keymap(keymap_data, NULL,
W90P910_NUM_ROWS, W90P910_NUM_COLS,
keypad->keymap, input_dev);
if (error) {
dev_err(&pdev->dev, "failed to build keymap\n");
goto failed_put_clk;
}
error = request_irq(keypad->irq, w90p910_keypad_irq_handler,
0, pdev->name, keypad);
if (error) {
dev_err(&pdev->dev, "failed to request IRQ\n");
goto failed_put_clk;
}
__set_bit(EV_REP, input_dev->evbit);
input_set_capability(input_dev, EV_MSC, MSC_SCAN);
input_set_drvdata(input_dev, keypad);
/* Register the input device */
error = input_register_device(input_dev);
if (error) {
dev_err(&pdev->dev, "failed to register input device\n");
goto failed_free_irq;
}
platform_set_drvdata(pdev, keypad);
return 0;
failed_free_irq:
free_irq(irq, pdev);
failed_put_clk:
clk_put(keypad->clk);
failed_free_io:
iounmap(keypad->mmio_base);
failed_free_res:
release_mem_region(res->start, resource_size(res));
failed_free:
input_free_device(input_dev);
kfree(keypad);
return error;
}
static int __devexit w90p910_keypad_remove(struct platform_device *pdev)
{
struct w90p910_keypad *keypad = platform_get_drvdata(pdev);
struct resource *res;
free_irq(keypad->irq, pdev);
clk_put(keypad->clk);
input_unregister_device(keypad->input_dev);
iounmap(keypad->mmio_base);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
release_mem_region(res->start, resource_size(res));
platform_set_drvdata(pdev, NULL);
kfree(keypad);
return 0;
}
static struct platform_driver w90p910_keypad_driver = {
.probe = w90p910_keypad_probe,
.remove = w90p910_keypad_remove,
.driver = {
.name = "nuc900-kpi",
.owner = THIS_MODULE,
},
};
module_platform_driver(w90p910_keypad_driver);
MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
MODULE_DESCRIPTION("w90p910 keypad driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:nuc900-keypad");
|
