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1/*
2 * OMAP4 Keypad Driver
3 *
4 * Copyright (C) 2010 Texas Instruments
5 *
6 * Author: Abraham Arce <x0066660@ti.com>
7 * Initial Code: Syed Rafiuddin <rafiuddin.syed@ti.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 */
23
24#include <linux/module.h>
25#include <linux/init.h>
26#include <linux/interrupt.h>
27#include <linux/platform_device.h>
28#include <linux/errno.h>
29#include <linux/io.h>
30#include <linux/input.h>
31#include <linux/slab.h>
32#include <linux/pm_runtime.h>
33
34#include <plat/omap4-keypad.h>
35
36/* OMAP4 registers */
37#define OMAP4_KBD_REVISION 0x00
38#define OMAP4_KBD_SYSCONFIG 0x10
39#define OMAP4_KBD_SYSSTATUS 0x14
40#define OMAP4_KBD_IRQSTATUS 0x18
41#define OMAP4_KBD_IRQENABLE 0x1C
42#define OMAP4_KBD_WAKEUPENABLE 0x20
43#define OMAP4_KBD_PENDING 0x24
44#define OMAP4_KBD_CTRL 0x28
45#define OMAP4_KBD_DEBOUNCINGTIME 0x2C
46#define OMAP4_KBD_LONGKEYTIME 0x30
47#define OMAP4_KBD_TIMEOUT 0x34
48#define OMAP4_KBD_STATEMACHINE 0x38
49#define OMAP4_KBD_ROWINPUTS 0x3C
50#define OMAP4_KBD_COLUMNOUTPUTS 0x40
51#define OMAP4_KBD_FULLCODE31_0 0x44
52#define OMAP4_KBD_FULLCODE63_32 0x48
53
54/* OMAP4 bit definitions */
55#define OMAP4_DEF_IRQENABLE_EVENTEN (1 << 0)
56#define OMAP4_DEF_IRQENABLE_LONGKEY (1 << 1)
57#define OMAP4_DEF_IRQENABLE_TIMEOUTEN (1 << 2)
58#define OMAP4_DEF_WUP_EVENT_ENA (1 << 0)
59#define OMAP4_DEF_WUP_LONG_KEY_ENA (1 << 1)
60#define OMAP4_DEF_CTRL_NOSOFTMODE (1 << 1)
61#define OMAP4_DEF_CTRLPTVVALUE (1 << 2)
62#define OMAP4_DEF_CTRLPTV (1 << 1)
63
64/* OMAP4 values */
65#define OMAP4_VAL_IRQDISABLE 0x00
66#define OMAP4_VAL_DEBOUNCINGTIME 0x07
67#define OMAP4_VAL_FUNCTIONALCFG 0x1E
68
69#define OMAP4_MASK_IRQSTATUSDISABLE 0xFFFF
70
71struct omap4_keypad {
72 struct input_dev *input;
73
74 void __iomem *base;
75 int irq;
76
77 unsigned int rows;
78 unsigned int cols;
79 unsigned int row_shift;
80 unsigned char key_state[8];
81 unsigned short keymap[];
82};
83
84/* Interrupt handler */
85static irqreturn_t omap4_keypad_interrupt(int irq, void *dev_id)
86{
87 struct omap4_keypad *keypad_data = dev_id;
88 struct input_dev *input_dev = keypad_data->input;
89 unsigned char key_state[ARRAY_SIZE(keypad_data->key_state)];
90 unsigned int col, row, code, changed;
91 u32 *new_state = (u32 *) key_state;
92
93 /* Disable interrupts */
94 __raw_writel(OMAP4_VAL_IRQDISABLE,
95 keypad_data->base + OMAP4_KBD_IRQENABLE);
96
97 *new_state = __raw_readl(keypad_data->base + OMAP4_KBD_FULLCODE31_0);
98 *(new_state + 1) = __raw_readl(keypad_data->base
99 + OMAP4_KBD_FULLCODE63_32);
100
101 for (row = 0; row < keypad_data->rows; row++) {
102 changed = key_state[row] ^ keypad_data->key_state[row];
103 if (!changed)
104 continue;
105
106 for (col = 0; col < keypad_data->cols; col++) {
107 if (changed & (1 << col)) {
108 code = MATRIX_SCAN_CODE(row, col,
109 keypad_data->row_shift);
110 input_event(input_dev, EV_MSC, MSC_SCAN, code);
111 input_report_key(input_dev,
112 keypad_data->keymap[code],
113 key_state[row] & (1 << col));
114 }
115 }
116 }
117
118 input_sync(input_dev);
119
120 memcpy(keypad_data->key_state, key_state,
121 sizeof(keypad_data->key_state));
122
123 /* clear pending interrupts */
124 __raw_writel(__raw_readl(keypad_data->base + OMAP4_KBD_IRQSTATUS),
125 keypad_data->base + OMAP4_KBD_IRQSTATUS);
126
127 /* enable interrupts */
128 __raw_writel(OMAP4_DEF_IRQENABLE_EVENTEN | OMAP4_DEF_IRQENABLE_LONGKEY,
129 keypad_data->base + OMAP4_KBD_IRQENABLE);
130
131 return IRQ_HANDLED;
132}
133
134static int omap4_keypad_open(struct input_dev *input)
135{
136 struct omap4_keypad *keypad_data = input_get_drvdata(input);
137
138 pm_runtime_get_sync(input->dev.parent);
139
140 disable_irq(keypad_data->irq);
141
142 __raw_writel(OMAP4_VAL_FUNCTIONALCFG,
143 keypad_data->base + OMAP4_KBD_CTRL);
144 __raw_writel(OMAP4_VAL_DEBOUNCINGTIME,
145 keypad_data->base + OMAP4_KBD_DEBOUNCINGTIME);
146 __raw_writel(OMAP4_VAL_IRQDISABLE,
147 keypad_data->base + OMAP4_KBD_IRQSTATUS);
148 __raw_writel(OMAP4_DEF_IRQENABLE_EVENTEN | OMAP4_DEF_IRQENABLE_LONGKEY,
149 keypad_data->base + OMAP4_KBD_IRQENABLE);
150 __raw_writel(OMAP4_DEF_WUP_EVENT_ENA | OMAP4_DEF_WUP_LONG_KEY_ENA,
151 keypad_data->base + OMAP4_KBD_WAKEUPENABLE);
152
153 enable_irq(keypad_data->irq);
154
155 return 0;
156}
157
158static void omap4_keypad_close(struct input_dev *input)
159{
160 struct omap4_keypad *keypad_data = input_get_drvdata(input);
161
162 disable_irq(keypad_data->irq);
163
164 /* Disable interrupts */
165 __raw_writel(OMAP4_VAL_IRQDISABLE,
166 keypad_data->base + OMAP4_KBD_IRQENABLE);
167
168 /* clear pending interrupts */
169 __raw_writel(__raw_readl(keypad_data->base + OMAP4_KBD_IRQSTATUS),
170 keypad_data->base + OMAP4_KBD_IRQSTATUS);
171
172 enable_irq(keypad_data->irq);
173
174 pm_runtime_put_sync(input->dev.parent);
175}
176
177static int __devinit omap4_keypad_probe(struct platform_device *pdev)
178{
179 const struct omap4_keypad_platform_data *pdata;
180 struct omap4_keypad *keypad_data;
181 struct input_dev *input_dev;
182 struct resource *res;
183 resource_size_t size;
184 unsigned int row_shift, max_keys;
185 int irq;
186 int error;
187
188 /* platform data */
189 pdata = pdev->dev.platform_data;
190 if (!pdata) {
191 dev_err(&pdev->dev, "no platform data defined\n");
192 return -EINVAL;
193 }
194
195 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
196 if (!res) {
197 dev_err(&pdev->dev, "no base address specified\n");
198 return -EINVAL;
199 }
200
201 irq = platform_get_irq(pdev, 0);
202 if (!irq) {
203 dev_err(&pdev->dev, "no keyboard irq assigned\n");
204 return -EINVAL;
205 }
206
207 if (!pdata->keymap_data) {
208 dev_err(&pdev->dev, "no keymap data defined\n");
209 return -EINVAL;
210 }
211
212 row_shift = get_count_order(pdata->cols);
213 max_keys = pdata->rows << row_shift;
214
215 keypad_data = kzalloc(sizeof(struct omap4_keypad) +
216 max_keys * sizeof(keypad_data->keymap[0]),
217 GFP_KERNEL);
218 if (!keypad_data) {
219 dev_err(&pdev->dev, "keypad_data memory allocation failed\n");
220 return -ENOMEM;
221 }
222
223 size = resource_size(res);
224
225 res = request_mem_region(res->start, size, pdev->name);
226 if (!res) {
227 dev_err(&pdev->dev, "can't request mem region\n");
228 error = -EBUSY;
229 goto err_free_keypad;
230 }
231
232 keypad_data->base = ioremap(res->start, resource_size(res));
233 if (!keypad_data->base) {
234 dev_err(&pdev->dev, "can't ioremap mem resource\n");
235 error = -ENOMEM;
236 goto err_release_mem;
237 }
238
239 keypad_data->irq = irq;
240 keypad_data->row_shift = row_shift;
241 keypad_data->rows = pdata->rows;
242 keypad_data->cols = pdata->cols;
243
244 /* input device allocation */
245 keypad_data->input = input_dev = input_allocate_device();
246 if (!input_dev) {
247 error = -ENOMEM;
248 goto err_unmap;
249 }
250
251 input_dev->name = pdev->name;
252 input_dev->dev.parent = &pdev->dev;
253 input_dev->id.bustype = BUS_HOST;
254 input_dev->id.vendor = 0x0001;
255 input_dev->id.product = 0x0001;
256 input_dev->id.version = 0x0001;
257
258 input_dev->open = omap4_keypad_open;
259 input_dev->close = omap4_keypad_close;
260
261 input_dev->keycode = keypad_data->keymap;
262 input_dev->keycodesize = sizeof(keypad_data->keymap[0]);
263 input_dev->keycodemax = max_keys;
264
265 __set_bit(EV_KEY, input_dev->evbit);
266 __set_bit(EV_REP, input_dev->evbit);
267
268 input_set_capability(input_dev, EV_MSC, MSC_SCAN);
269
270 input_set_drvdata(input_dev, keypad_data);
271
272 matrix_keypad_build_keymap(pdata->keymap_data, row_shift,
273 input_dev->keycode, input_dev->keybit);
274
275 error = request_irq(keypad_data->irq, omap4_keypad_interrupt,
276 IRQF_TRIGGER_RISING,
277 "omap4-keypad", keypad_data);
278 if (error) {
279 dev_err(&pdev->dev, "failed to register interrupt\n");
280 goto err_free_input;
281 }
282
283 pm_runtime_enable(&pdev->dev);
284
285 error = input_register_device(keypad_data->input);
286 if (error < 0) {
287 dev_err(&pdev->dev, "failed to register input device\n");
288 goto err_pm_disable;
289 }
290
291 platform_set_drvdata(pdev, keypad_data);
292 return 0;
293
294err_pm_disable:
295 pm_runtime_disable(&pdev->dev);
296 free_irq(keypad_data->irq, keypad_data);
297err_free_input:
298 input_free_device(input_dev);
299err_unmap:
300 iounmap(keypad_data->base);
301err_release_mem:
302 release_mem_region(res->start, size);
303err_free_keypad:
304 kfree(keypad_data);
305 return error;
306}
307
308static int __devexit omap4_keypad_remove(struct platform_device *pdev)
309{
310 struct omap4_keypad *keypad_data = platform_get_drvdata(pdev);
311 struct resource *res;
312
313 free_irq(keypad_data->irq, keypad_data);
314
315 pm_runtime_disable(&pdev->dev);
316
317 input_unregister_device(keypad_data->input);
318
319 iounmap(keypad_data->base);
320
321 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
322 release_mem_region(res->start, resource_size(res));
323
324 kfree(keypad_data);
325 platform_set_drvdata(pdev, NULL);
326
327 return 0;
328}
329
330static struct platform_driver omap4_keypad_driver = {
331 .probe = omap4_keypad_probe,
332 .remove = __devexit_p(omap4_keypad_remove),
333 .driver = {
334 .name = "omap4-keypad",
335 .owner = THIS_MODULE,
336 },
337};
338
339static int __init omap4_keypad_init(void)
340{
341 return platform_driver_register(&omap4_keypad_driver);
342}
343module_init(omap4_keypad_init);
344
345static void __exit omap4_keypad_exit(void)
346{
347 platform_driver_unregister(&omap4_keypad_driver);
348}
349module_exit(omap4_keypad_exit);
350
351MODULE_AUTHOR("Texas Instruments");
352MODULE_DESCRIPTION("OMAP4 Keypad Driver");
353MODULE_LICENSE("GPL");
354MODULE_ALIAS("platform:omap4-keypad");
1/*
2 * OMAP4 Keypad Driver
3 *
4 * Copyright (C) 2010 Texas Instruments
5 *
6 * Author: Abraham Arce <x0066660@ti.com>
7 * Initial Code: Syed Rafiuddin <rafiuddin.syed@ti.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 */
23
24#include <linux/module.h>
25#include <linux/interrupt.h>
26#include <linux/platform_device.h>
27#include <linux/errno.h>
28#include <linux/io.h>
29#include <linux/of.h>
30#include <linux/input.h>
31#include <linux/slab.h>
32#include <linux/pm_runtime.h>
33
34#include <linux/platform_data/omap4-keypad.h>
35
36/* OMAP4 registers */
37#define OMAP4_KBD_REVISION 0x00
38#define OMAP4_KBD_SYSCONFIG 0x10
39#define OMAP4_KBD_SYSSTATUS 0x14
40#define OMAP4_KBD_IRQSTATUS 0x18
41#define OMAP4_KBD_IRQENABLE 0x1C
42#define OMAP4_KBD_WAKEUPENABLE 0x20
43#define OMAP4_KBD_PENDING 0x24
44#define OMAP4_KBD_CTRL 0x28
45#define OMAP4_KBD_DEBOUNCINGTIME 0x2C
46#define OMAP4_KBD_LONGKEYTIME 0x30
47#define OMAP4_KBD_TIMEOUT 0x34
48#define OMAP4_KBD_STATEMACHINE 0x38
49#define OMAP4_KBD_ROWINPUTS 0x3C
50#define OMAP4_KBD_COLUMNOUTPUTS 0x40
51#define OMAP4_KBD_FULLCODE31_0 0x44
52#define OMAP4_KBD_FULLCODE63_32 0x48
53
54/* OMAP4 bit definitions */
55#define OMAP4_DEF_IRQENABLE_EVENTEN BIT(0)
56#define OMAP4_DEF_IRQENABLE_LONGKEY BIT(1)
57#define OMAP4_DEF_WUP_EVENT_ENA BIT(0)
58#define OMAP4_DEF_WUP_LONG_KEY_ENA BIT(1)
59#define OMAP4_DEF_CTRL_NOSOFTMODE BIT(1)
60#define OMAP4_DEF_CTRL_PTV_SHIFT 2
61
62/* OMAP4 values */
63#define OMAP4_VAL_IRQDISABLE 0x0
64#define OMAP4_VAL_DEBOUNCINGTIME 0x7
65#define OMAP4_VAL_PVT 0x7
66
67enum {
68 KBD_REVISION_OMAP4 = 0,
69 KBD_REVISION_OMAP5,
70};
71
72struct omap4_keypad {
73 struct input_dev *input;
74
75 void __iomem *base;
76 bool irq_wake_enabled;
77 unsigned int irq;
78
79 unsigned int rows;
80 unsigned int cols;
81 u32 reg_offset;
82 u32 irqreg_offset;
83 unsigned int row_shift;
84 bool no_autorepeat;
85 unsigned char key_state[8];
86 unsigned short *keymap;
87};
88
89static int kbd_readl(struct omap4_keypad *keypad_data, u32 offset)
90{
91 return __raw_readl(keypad_data->base +
92 keypad_data->reg_offset + offset);
93}
94
95static void kbd_writel(struct omap4_keypad *keypad_data, u32 offset, u32 value)
96{
97 __raw_writel(value,
98 keypad_data->base + keypad_data->reg_offset + offset);
99}
100
101static int kbd_read_irqreg(struct omap4_keypad *keypad_data, u32 offset)
102{
103 return __raw_readl(keypad_data->base +
104 keypad_data->irqreg_offset + offset);
105}
106
107static void kbd_write_irqreg(struct omap4_keypad *keypad_data,
108 u32 offset, u32 value)
109{
110 __raw_writel(value,
111 keypad_data->base + keypad_data->irqreg_offset + offset);
112}
113
114
115/* Interrupt handlers */
116static irqreturn_t omap4_keypad_irq_handler(int irq, void *dev_id)
117{
118 struct omap4_keypad *keypad_data = dev_id;
119
120 if (kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS)) {
121 /* Disable interrupts */
122 kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE,
123 OMAP4_VAL_IRQDISABLE);
124 return IRQ_WAKE_THREAD;
125 }
126
127 return IRQ_NONE;
128}
129
130static irqreturn_t omap4_keypad_irq_thread_fn(int irq, void *dev_id)
131{
132 struct omap4_keypad *keypad_data = dev_id;
133 struct input_dev *input_dev = keypad_data->input;
134 unsigned char key_state[ARRAY_SIZE(keypad_data->key_state)];
135 unsigned int col, row, code, changed;
136 u32 *new_state = (u32 *) key_state;
137
138 *new_state = kbd_readl(keypad_data, OMAP4_KBD_FULLCODE31_0);
139 *(new_state + 1) = kbd_readl(keypad_data, OMAP4_KBD_FULLCODE63_32);
140
141 for (row = 0; row < keypad_data->rows; row++) {
142 changed = key_state[row] ^ keypad_data->key_state[row];
143 if (!changed)
144 continue;
145
146 for (col = 0; col < keypad_data->cols; col++) {
147 if (changed & (1 << col)) {
148 code = MATRIX_SCAN_CODE(row, col,
149 keypad_data->row_shift);
150 input_event(input_dev, EV_MSC, MSC_SCAN, code);
151 input_report_key(input_dev,
152 keypad_data->keymap[code],
153 key_state[row] & (1 << col));
154 }
155 }
156 }
157
158 input_sync(input_dev);
159
160 memcpy(keypad_data->key_state, key_state,
161 sizeof(keypad_data->key_state));
162
163 /* clear pending interrupts */
164 kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS,
165 kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS));
166
167 /* enable interrupts */
168 kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE,
169 OMAP4_DEF_IRQENABLE_EVENTEN |
170 OMAP4_DEF_IRQENABLE_LONGKEY);
171
172 return IRQ_HANDLED;
173}
174
175static int omap4_keypad_open(struct input_dev *input)
176{
177 struct omap4_keypad *keypad_data = input_get_drvdata(input);
178
179 pm_runtime_get_sync(input->dev.parent);
180
181 disable_irq(keypad_data->irq);
182
183 kbd_writel(keypad_data, OMAP4_KBD_CTRL,
184 OMAP4_DEF_CTRL_NOSOFTMODE |
185 (OMAP4_VAL_PVT << OMAP4_DEF_CTRL_PTV_SHIFT));
186 kbd_writel(keypad_data, OMAP4_KBD_DEBOUNCINGTIME,
187 OMAP4_VAL_DEBOUNCINGTIME);
188 /* clear pending interrupts */
189 kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS,
190 kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS));
191 kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE,
192 OMAP4_DEF_IRQENABLE_EVENTEN |
193 OMAP4_DEF_IRQENABLE_LONGKEY);
194 kbd_writel(keypad_data, OMAP4_KBD_WAKEUPENABLE,
195 OMAP4_DEF_WUP_EVENT_ENA | OMAP4_DEF_WUP_LONG_KEY_ENA);
196
197 enable_irq(keypad_data->irq);
198
199 return 0;
200}
201
202static void omap4_keypad_close(struct input_dev *input)
203{
204 struct omap4_keypad *keypad_data = input_get_drvdata(input);
205
206 disable_irq(keypad_data->irq);
207
208 /* Disable interrupts */
209 kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE,
210 OMAP4_VAL_IRQDISABLE);
211
212 /* clear pending interrupts */
213 kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS,
214 kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS));
215
216 enable_irq(keypad_data->irq);
217
218 pm_runtime_put_sync(input->dev.parent);
219}
220
221#ifdef CONFIG_OF
222static int omap4_keypad_parse_dt(struct device *dev,
223 struct omap4_keypad *keypad_data)
224{
225 struct device_node *np = dev->of_node;
226 int err;
227
228 err = matrix_keypad_parse_of_params(dev, &keypad_data->rows,
229 &keypad_data->cols);
230 if (err)
231 return err;
232
233 if (of_get_property(np, "linux,input-no-autorepeat", NULL))
234 keypad_data->no_autorepeat = true;
235
236 return 0;
237}
238#else
239static inline int omap4_keypad_parse_dt(struct device *dev,
240 struct omap4_keypad *keypad_data)
241{
242 return -ENOSYS;
243}
244#endif
245
246static int omap4_keypad_probe(struct platform_device *pdev)
247{
248 const struct omap4_keypad_platform_data *pdata =
249 dev_get_platdata(&pdev->dev);
250 const struct matrix_keymap_data *keymap_data =
251 pdata ? pdata->keymap_data : NULL;
252 struct omap4_keypad *keypad_data;
253 struct input_dev *input_dev;
254 struct resource *res;
255 unsigned int max_keys;
256 int rev;
257 int irq;
258 int error;
259
260 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
261 if (!res) {
262 dev_err(&pdev->dev, "no base address specified\n");
263 return -EINVAL;
264 }
265
266 irq = platform_get_irq(pdev, 0);
267 if (!irq) {
268 dev_err(&pdev->dev, "no keyboard irq assigned\n");
269 return -EINVAL;
270 }
271
272 keypad_data = kzalloc(sizeof(struct omap4_keypad), GFP_KERNEL);
273 if (!keypad_data) {
274 dev_err(&pdev->dev, "keypad_data memory allocation failed\n");
275 return -ENOMEM;
276 }
277
278 keypad_data->irq = irq;
279
280 if (pdata) {
281 keypad_data->rows = pdata->rows;
282 keypad_data->cols = pdata->cols;
283 } else {
284 error = omap4_keypad_parse_dt(&pdev->dev, keypad_data);
285 if (error)
286 return error;
287 }
288
289 res = request_mem_region(res->start, resource_size(res), pdev->name);
290 if (!res) {
291 dev_err(&pdev->dev, "can't request mem region\n");
292 error = -EBUSY;
293 goto err_free_keypad;
294 }
295
296 keypad_data->base = ioremap(res->start, resource_size(res));
297 if (!keypad_data->base) {
298 dev_err(&pdev->dev, "can't ioremap mem resource\n");
299 error = -ENOMEM;
300 goto err_release_mem;
301 }
302
303
304 /*
305 * Enable clocks for the keypad module so that we can read
306 * revision register.
307 */
308 pm_runtime_enable(&pdev->dev);
309 error = pm_runtime_get_sync(&pdev->dev);
310 if (error) {
311 dev_err(&pdev->dev, "pm_runtime_get_sync() failed\n");
312 goto err_unmap;
313 }
314 rev = __raw_readl(keypad_data->base + OMAP4_KBD_REVISION);
315 rev &= 0x03 << 30;
316 rev >>= 30;
317 switch (rev) {
318 case KBD_REVISION_OMAP4:
319 keypad_data->reg_offset = 0x00;
320 keypad_data->irqreg_offset = 0x00;
321 break;
322 case KBD_REVISION_OMAP5:
323 keypad_data->reg_offset = 0x10;
324 keypad_data->irqreg_offset = 0x0c;
325 break;
326 default:
327 dev_err(&pdev->dev,
328 "Keypad reports unsupported revision %d", rev);
329 error = -EINVAL;
330 goto err_pm_put_sync;
331 }
332
333 /* input device allocation */
334 keypad_data->input = input_dev = input_allocate_device();
335 if (!input_dev) {
336 error = -ENOMEM;
337 goto err_pm_put_sync;
338 }
339
340 input_dev->name = pdev->name;
341 input_dev->dev.parent = &pdev->dev;
342 input_dev->id.bustype = BUS_HOST;
343 input_dev->id.vendor = 0x0001;
344 input_dev->id.product = 0x0001;
345 input_dev->id.version = 0x0001;
346
347 input_dev->open = omap4_keypad_open;
348 input_dev->close = omap4_keypad_close;
349
350 input_set_capability(input_dev, EV_MSC, MSC_SCAN);
351 if (!keypad_data->no_autorepeat)
352 __set_bit(EV_REP, input_dev->evbit);
353
354 input_set_drvdata(input_dev, keypad_data);
355
356 keypad_data->row_shift = get_count_order(keypad_data->cols);
357 max_keys = keypad_data->rows << keypad_data->row_shift;
358 keypad_data->keymap = kzalloc(max_keys * sizeof(keypad_data->keymap[0]),
359 GFP_KERNEL);
360 if (!keypad_data->keymap) {
361 dev_err(&pdev->dev, "Not enough memory for keymap\n");
362 error = -ENOMEM;
363 goto err_free_input;
364 }
365
366 error = matrix_keypad_build_keymap(keymap_data, NULL,
367 keypad_data->rows, keypad_data->cols,
368 keypad_data->keymap, input_dev);
369 if (error) {
370 dev_err(&pdev->dev, "failed to build keymap\n");
371 goto err_free_keymap;
372 }
373
374 error = request_threaded_irq(keypad_data->irq, omap4_keypad_irq_handler,
375 omap4_keypad_irq_thread_fn, 0,
376 "omap4-keypad", keypad_data);
377 if (error) {
378 dev_err(&pdev->dev, "failed to register interrupt\n");
379 goto err_free_input;
380 }
381
382 device_init_wakeup(&pdev->dev, true);
383 pm_runtime_put_sync(&pdev->dev);
384
385 error = input_register_device(keypad_data->input);
386 if (error < 0) {
387 dev_err(&pdev->dev, "failed to register input device\n");
388 goto err_pm_disable;
389 }
390
391 platform_set_drvdata(pdev, keypad_data);
392 return 0;
393
394err_pm_disable:
395 pm_runtime_disable(&pdev->dev);
396 device_init_wakeup(&pdev->dev, false);
397 free_irq(keypad_data->irq, keypad_data);
398err_free_keymap:
399 kfree(keypad_data->keymap);
400err_free_input:
401 input_free_device(input_dev);
402err_pm_put_sync:
403 pm_runtime_put_sync(&pdev->dev);
404err_unmap:
405 iounmap(keypad_data->base);
406err_release_mem:
407 release_mem_region(res->start, resource_size(res));
408err_free_keypad:
409 kfree(keypad_data);
410 return error;
411}
412
413static int omap4_keypad_remove(struct platform_device *pdev)
414{
415 struct omap4_keypad *keypad_data = platform_get_drvdata(pdev);
416 struct resource *res;
417
418 free_irq(keypad_data->irq, keypad_data);
419
420 pm_runtime_disable(&pdev->dev);
421
422 device_init_wakeup(&pdev->dev, false);
423
424 input_unregister_device(keypad_data->input);
425
426 iounmap(keypad_data->base);
427
428 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
429 release_mem_region(res->start, resource_size(res));
430
431 kfree(keypad_data->keymap);
432 kfree(keypad_data);
433
434 return 0;
435}
436
437#ifdef CONFIG_OF
438static const struct of_device_id omap_keypad_dt_match[] = {
439 { .compatible = "ti,omap4-keypad" },
440 {},
441};
442MODULE_DEVICE_TABLE(of, omap_keypad_dt_match);
443#endif
444
445#ifdef CONFIG_PM_SLEEP
446static int omap4_keypad_suspend(struct device *dev)
447{
448 struct platform_device *pdev = to_platform_device(dev);
449 struct omap4_keypad *keypad_data = platform_get_drvdata(pdev);
450 int error;
451
452 if (device_may_wakeup(&pdev->dev)) {
453 error = enable_irq_wake(keypad_data->irq);
454 if (!error)
455 keypad_data->irq_wake_enabled = true;
456 }
457
458 return 0;
459}
460
461static int omap4_keypad_resume(struct device *dev)
462{
463 struct platform_device *pdev = to_platform_device(dev);
464 struct omap4_keypad *keypad_data = platform_get_drvdata(pdev);
465
466 if (device_may_wakeup(&pdev->dev) && keypad_data->irq_wake_enabled) {
467 disable_irq_wake(keypad_data->irq);
468 keypad_data->irq_wake_enabled = false;
469 }
470
471 return 0;
472}
473#endif
474
475static SIMPLE_DEV_PM_OPS(omap4_keypad_pm_ops,
476 omap4_keypad_suspend, omap4_keypad_resume);
477
478static struct platform_driver omap4_keypad_driver = {
479 .probe = omap4_keypad_probe,
480 .remove = omap4_keypad_remove,
481 .driver = {
482 .name = "omap4-keypad",
483 .owner = THIS_MODULE,
484 .pm = &omap4_keypad_pm_ops,
485 .of_match_table = of_match_ptr(omap_keypad_dt_match),
486 },
487};
488module_platform_driver(omap4_keypad_driver);
489
490MODULE_AUTHOR("Texas Instruments");
491MODULE_DESCRIPTION("OMAP4 Keypad Driver");
492MODULE_LICENSE("GPL");
493MODULE_ALIAS("platform:omap4-keypad");