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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * linux/drivers/input/keyboard/omap-keypad.c
4 *
5 * OMAP Keypad Driver
6 *
7 * Copyright (C) 2003 Nokia Corporation
8 * Written by Timo Teräs <ext-timo.teras@nokia.com>
9 *
10 * Added support for H2 & H3 Keypad
11 * Copyright (C) 2004 Texas Instruments
12 */
13
14#include <linux/module.h>
15#include <linux/interrupt.h>
16#include <linux/types.h>
17#include <linux/input.h>
18#include <linux/kernel.h>
19#include <linux/delay.h>
20#include <linux/platform_device.h>
21#include <linux/mutex.h>
22#include <linux/errno.h>
23#include <linux/slab.h>
24#include <linux/gpio.h>
25#include <linux/platform_data/gpio-omap.h>
26#include <linux/platform_data/keypad-omap.h>
27#include <linux/soc/ti/omap1-io.h>
28
29#undef NEW_BOARD_LEARNING_MODE
30
31static void omap_kp_tasklet(unsigned long);
32static void omap_kp_timer(struct timer_list *);
33
34static unsigned char keypad_state[8];
35static DEFINE_MUTEX(kp_enable_mutex);
36static int kp_enable = 1;
37static int kp_cur_group = -1;
38
39struct omap_kp {
40 struct input_dev *input;
41 struct timer_list timer;
42 int irq;
43 unsigned int rows;
44 unsigned int cols;
45 unsigned long delay;
46 unsigned int debounce;
47 unsigned short keymap[];
48};
49
50static DECLARE_TASKLET_DISABLED_OLD(kp_tasklet, omap_kp_tasklet);
51
52static unsigned int *row_gpios;
53static unsigned int *col_gpios;
54
55static irqreturn_t omap_kp_interrupt(int irq, void *dev_id)
56{
57 /* disable keyboard interrupt and schedule for handling */
58 omap_writew(1, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
59
60 tasklet_schedule(&kp_tasklet);
61
62 return IRQ_HANDLED;
63}
64
65static void omap_kp_timer(struct timer_list *unused)
66{
67 tasklet_schedule(&kp_tasklet);
68}
69
70static void omap_kp_scan_keypad(struct omap_kp *omap_kp, unsigned char *state)
71{
72 int col = 0;
73
74 /* disable keyboard interrupt and schedule for handling */
75 omap_writew(1, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
76
77 /* read the keypad status */
78 omap_writew(0xff, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBC);
79 for (col = 0; col < omap_kp->cols; col++) {
80 omap_writew(~(1 << col) & 0xff,
81 OMAP1_MPUIO_BASE + OMAP_MPUIO_KBC);
82
83 udelay(omap_kp->delay);
84
85 state[col] = ~omap_readw(OMAP1_MPUIO_BASE +
86 OMAP_MPUIO_KBR_LATCH) & 0xff;
87 }
88 omap_writew(0x00, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBC);
89 udelay(2);
90}
91
92static void omap_kp_tasklet(unsigned long data)
93{
94 struct omap_kp *omap_kp_data = (struct omap_kp *) data;
95 unsigned short *keycodes = omap_kp_data->input->keycode;
96 unsigned int row_shift = get_count_order(omap_kp_data->cols);
97 unsigned char new_state[8], changed, key_down = 0;
98 int col, row;
99
100 /* check for any changes */
101 omap_kp_scan_keypad(omap_kp_data, new_state);
102
103 /* check for changes and print those */
104 for (col = 0; col < omap_kp_data->cols; col++) {
105 changed = new_state[col] ^ keypad_state[col];
106 key_down |= new_state[col];
107 if (changed == 0)
108 continue;
109
110 for (row = 0; row < omap_kp_data->rows; row++) {
111 int key;
112 if (!(changed & (1 << row)))
113 continue;
114#ifdef NEW_BOARD_LEARNING_MODE
115 printk(KERN_INFO "omap-keypad: key %d-%d %s\n", col,
116 row, (new_state[col] & (1 << row)) ?
117 "pressed" : "released");
118#else
119 key = keycodes[MATRIX_SCAN_CODE(row, col, row_shift)];
120
121 if (!(kp_cur_group == (key & GROUP_MASK) ||
122 kp_cur_group == -1))
123 continue;
124
125 kp_cur_group = key & GROUP_MASK;
126 input_report_key(omap_kp_data->input, key & ~GROUP_MASK,
127 new_state[col] & (1 << row));
128#endif
129 }
130 }
131 input_sync(omap_kp_data->input);
132 memcpy(keypad_state, new_state, sizeof(keypad_state));
133
134 if (key_down) {
135 /* some key is pressed - keep irq disabled and use timer
136 * to poll the keypad */
137 mod_timer(&omap_kp_data->timer, jiffies + HZ / 20);
138 } else {
139 /* enable interrupts */
140 omap_writew(0, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
141 kp_cur_group = -1;
142 }
143}
144
145static ssize_t omap_kp_enable_show(struct device *dev,
146 struct device_attribute *attr, char *buf)
147{
148 return sprintf(buf, "%u\n", kp_enable);
149}
150
151static ssize_t omap_kp_enable_store(struct device *dev, struct device_attribute *attr,
152 const char *buf, size_t count)
153{
154 struct omap_kp *omap_kp = dev_get_drvdata(dev);
155 int state;
156
157 if (sscanf(buf, "%u", &state) != 1)
158 return -EINVAL;
159
160 if ((state != 1) && (state != 0))
161 return -EINVAL;
162
163 mutex_lock(&kp_enable_mutex);
164 if (state != kp_enable) {
165 if (state)
166 enable_irq(omap_kp->irq);
167 else
168 disable_irq(omap_kp->irq);
169 kp_enable = state;
170 }
171 mutex_unlock(&kp_enable_mutex);
172
173 return strnlen(buf, count);
174}
175
176static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, omap_kp_enable_show, omap_kp_enable_store);
177
178static int omap_kp_probe(struct platform_device *pdev)
179{
180 struct omap_kp *omap_kp;
181 struct input_dev *input_dev;
182 struct omap_kp_platform_data *pdata = dev_get_platdata(&pdev->dev);
183 int i, col_idx, row_idx, ret;
184 unsigned int row_shift, keycodemax;
185
186 if (!pdata->rows || !pdata->cols || !pdata->keymap_data) {
187 printk(KERN_ERR "No rows, cols or keymap_data from pdata\n");
188 return -EINVAL;
189 }
190
191 row_shift = get_count_order(pdata->cols);
192 keycodemax = pdata->rows << row_shift;
193
194 omap_kp = kzalloc(struct_size(omap_kp, keymap, keycodemax), GFP_KERNEL);
195 input_dev = input_allocate_device();
196 if (!omap_kp || !input_dev) {
197 kfree(omap_kp);
198 input_free_device(input_dev);
199 return -ENOMEM;
200 }
201
202 platform_set_drvdata(pdev, omap_kp);
203
204 omap_kp->input = input_dev;
205
206 /* Disable the interrupt for the MPUIO keyboard */
207 omap_writew(1, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
208
209 if (pdata->delay)
210 omap_kp->delay = pdata->delay;
211
212 if (pdata->row_gpios && pdata->col_gpios) {
213 row_gpios = pdata->row_gpios;
214 col_gpios = pdata->col_gpios;
215 }
216
217 omap_kp->rows = pdata->rows;
218 omap_kp->cols = pdata->cols;
219
220 col_idx = 0;
221 row_idx = 0;
222
223 timer_setup(&omap_kp->timer, omap_kp_timer, 0);
224
225 /* get the irq and init timer*/
226 kp_tasklet.data = (unsigned long) omap_kp;
227 tasklet_enable(&kp_tasklet);
228
229 ret = device_create_file(&pdev->dev, &dev_attr_enable);
230 if (ret < 0)
231 goto err2;
232
233 /* setup input device */
234 input_dev->name = "omap-keypad";
235 input_dev->phys = "omap-keypad/input0";
236 input_dev->dev.parent = &pdev->dev;
237
238 input_dev->id.bustype = BUS_HOST;
239 input_dev->id.vendor = 0x0001;
240 input_dev->id.product = 0x0001;
241 input_dev->id.version = 0x0100;
242
243 if (pdata->rep)
244 __set_bit(EV_REP, input_dev->evbit);
245
246 ret = matrix_keypad_build_keymap(pdata->keymap_data, NULL,
247 pdata->rows, pdata->cols,
248 omap_kp->keymap, input_dev);
249 if (ret < 0)
250 goto err3;
251
252 ret = input_register_device(omap_kp->input);
253 if (ret < 0) {
254 printk(KERN_ERR "Unable to register omap-keypad input device\n");
255 goto err3;
256 }
257
258 if (pdata->dbounce)
259 omap_writew(0xff, OMAP1_MPUIO_BASE + OMAP_MPUIO_GPIO_DEBOUNCING);
260
261 /* scan current status and enable interrupt */
262 omap_kp_scan_keypad(omap_kp, keypad_state);
263 omap_kp->irq = platform_get_irq(pdev, 0);
264 if (omap_kp->irq >= 0) {
265 if (request_irq(omap_kp->irq, omap_kp_interrupt, 0,
266 "omap-keypad", omap_kp) < 0)
267 goto err4;
268 }
269 omap_writew(0, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
270
271 return 0;
272
273err4:
274 input_unregister_device(omap_kp->input);
275 input_dev = NULL;
276err3:
277 device_remove_file(&pdev->dev, &dev_attr_enable);
278err2:
279 for (i = row_idx - 1; i >= 0; i--)
280 gpio_free(row_gpios[i]);
281 for (i = col_idx - 1; i >= 0; i--)
282 gpio_free(col_gpios[i]);
283
284 kfree(omap_kp);
285 input_free_device(input_dev);
286
287 return -EINVAL;
288}
289
290static int omap_kp_remove(struct platform_device *pdev)
291{
292 struct omap_kp *omap_kp = platform_get_drvdata(pdev);
293
294 /* disable keypad interrupt handling */
295 tasklet_disable(&kp_tasklet);
296 omap_writew(1, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
297 free_irq(omap_kp->irq, omap_kp);
298
299 timer_shutdown_sync(&omap_kp->timer);
300 tasklet_kill(&kp_tasklet);
301
302 /* unregister everything */
303 input_unregister_device(omap_kp->input);
304
305 kfree(omap_kp);
306
307 return 0;
308}
309
310static struct platform_driver omap_kp_driver = {
311 .probe = omap_kp_probe,
312 .remove = omap_kp_remove,
313 .driver = {
314 .name = "omap-keypad",
315 },
316};
317module_platform_driver(omap_kp_driver);
318
319MODULE_AUTHOR("Timo Teräs");
320MODULE_DESCRIPTION("OMAP Keypad Driver");
321MODULE_LICENSE("GPL");
322MODULE_ALIAS("platform:omap-keypad");
1/*
2 * linux/drivers/input/keyboard/omap-keypad.c
3 *
4 * OMAP Keypad Driver
5 *
6 * Copyright (C) 2003 Nokia Corporation
7 * Written by Timo Teräs <ext-timo.teras@nokia.com>
8 *
9 * Added support for H2 & H3 Keypad
10 * Copyright (C) 2004 Texas Instruments
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 */
26
27#include <linux/module.h>
28#include <linux/init.h>
29#include <linux/interrupt.h>
30#include <linux/types.h>
31#include <linux/input.h>
32#include <linux/kernel.h>
33#include <linux/delay.h>
34#include <linux/platform_device.h>
35#include <linux/mutex.h>
36#include <linux/errno.h>
37#include <linux/slab.h>
38#include <asm/gpio.h>
39#include <plat/keypad.h>
40#include <plat/menelaus.h>
41#include <asm/irq.h>
42#include <mach/hardware.h>
43#include <asm/io.h>
44#include <plat/mux.h>
45
46#undef NEW_BOARD_LEARNING_MODE
47
48static void omap_kp_tasklet(unsigned long);
49static void omap_kp_timer(unsigned long);
50
51static unsigned char keypad_state[8];
52static DEFINE_MUTEX(kp_enable_mutex);
53static int kp_enable = 1;
54static int kp_cur_group = -1;
55
56struct omap_kp {
57 struct input_dev *input;
58 struct timer_list timer;
59 int irq;
60 unsigned int rows;
61 unsigned int cols;
62 unsigned long delay;
63 unsigned int debounce;
64 unsigned short keymap[];
65};
66
67static DECLARE_TASKLET_DISABLED(kp_tasklet, omap_kp_tasklet, 0);
68
69static unsigned int *row_gpios;
70static unsigned int *col_gpios;
71
72#ifdef CONFIG_ARCH_OMAP2
73static void set_col_gpio_val(struct omap_kp *omap_kp, u8 value)
74{
75 int col;
76
77 for (col = 0; col < omap_kp->cols; col++)
78 gpio_set_value(col_gpios[col], value & (1 << col));
79}
80
81static u8 get_row_gpio_val(struct omap_kp *omap_kp)
82{
83 int row;
84 u8 value = 0;
85
86 for (row = 0; row < omap_kp->rows; row++) {
87 if (gpio_get_value(row_gpios[row]))
88 value |= (1 << row);
89 }
90 return value;
91}
92#else
93#define set_col_gpio_val(x, y) do {} while (0)
94#define get_row_gpio_val(x) 0
95#endif
96
97static irqreturn_t omap_kp_interrupt(int irq, void *dev_id)
98{
99 struct omap_kp *omap_kp = dev_id;
100
101 /* disable keyboard interrupt and schedule for handling */
102 if (cpu_is_omap24xx()) {
103 int i;
104
105 for (i = 0; i < omap_kp->rows; i++) {
106 int gpio_irq = gpio_to_irq(row_gpios[i]);
107 /*
108 * The interrupt which we're currently handling should
109 * be disabled _nosync() to avoid deadlocks waiting
110 * for this handler to complete. All others should
111 * be disabled the regular way for SMP safety.
112 */
113 if (gpio_irq == irq)
114 disable_irq_nosync(gpio_irq);
115 else
116 disable_irq(gpio_irq);
117 }
118 } else
119 /* disable keyboard interrupt and schedule for handling */
120 omap_writew(1, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
121
122 tasklet_schedule(&kp_tasklet);
123
124 return IRQ_HANDLED;
125}
126
127static void omap_kp_timer(unsigned long data)
128{
129 tasklet_schedule(&kp_tasklet);
130}
131
132static void omap_kp_scan_keypad(struct omap_kp *omap_kp, unsigned char *state)
133{
134 int col = 0;
135
136 /* read the keypad status */
137 if (cpu_is_omap24xx()) {
138 /* read the keypad status */
139 for (col = 0; col < omap_kp->cols; col++) {
140 set_col_gpio_val(omap_kp, ~(1 << col));
141 state[col] = ~(get_row_gpio_val(omap_kp)) & 0xff;
142 }
143 set_col_gpio_val(omap_kp, 0);
144
145 } else {
146 /* disable keyboard interrupt and schedule for handling */
147 omap_writew(1, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
148
149 /* read the keypad status */
150 omap_writew(0xff, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBC);
151 for (col = 0; col < omap_kp->cols; col++) {
152 omap_writew(~(1 << col) & 0xff,
153 OMAP1_MPUIO_BASE + OMAP_MPUIO_KBC);
154
155 udelay(omap_kp->delay);
156
157 state[col] = ~omap_readw(OMAP1_MPUIO_BASE +
158 OMAP_MPUIO_KBR_LATCH) & 0xff;
159 }
160 omap_writew(0x00, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBC);
161 udelay(2);
162 }
163}
164
165static void omap_kp_tasklet(unsigned long data)
166{
167 struct omap_kp *omap_kp_data = (struct omap_kp *) data;
168 unsigned short *keycodes = omap_kp_data->input->keycode;
169 unsigned int row_shift = get_count_order(omap_kp_data->cols);
170 unsigned char new_state[8], changed, key_down = 0;
171 int col, row;
172 int spurious = 0;
173
174 /* check for any changes */
175 omap_kp_scan_keypad(omap_kp_data, new_state);
176
177 /* check for changes and print those */
178 for (col = 0; col < omap_kp_data->cols; col++) {
179 changed = new_state[col] ^ keypad_state[col];
180 key_down |= new_state[col];
181 if (changed == 0)
182 continue;
183
184 for (row = 0; row < omap_kp_data->rows; row++) {
185 int key;
186 if (!(changed & (1 << row)))
187 continue;
188#ifdef NEW_BOARD_LEARNING_MODE
189 printk(KERN_INFO "omap-keypad: key %d-%d %s\n", col,
190 row, (new_state[col] & (1 << row)) ?
191 "pressed" : "released");
192#else
193 key = keycodes[MATRIX_SCAN_CODE(row, col, row_shift)];
194 if (key < 0) {
195 printk(KERN_WARNING
196 "omap-keypad: Spurious key event %d-%d\n",
197 col, row);
198 /* We scan again after a couple of seconds */
199 spurious = 1;
200 continue;
201 }
202
203 if (!(kp_cur_group == (key & GROUP_MASK) ||
204 kp_cur_group == -1))
205 continue;
206
207 kp_cur_group = key & GROUP_MASK;
208 input_report_key(omap_kp_data->input, key & ~GROUP_MASK,
209 new_state[col] & (1 << row));
210#endif
211 }
212 }
213 input_sync(omap_kp_data->input);
214 memcpy(keypad_state, new_state, sizeof(keypad_state));
215
216 if (key_down) {
217 int delay = HZ / 20;
218 /* some key is pressed - keep irq disabled and use timer
219 * to poll the keypad */
220 if (spurious)
221 delay = 2 * HZ;
222 mod_timer(&omap_kp_data->timer, jiffies + delay);
223 } else {
224 /* enable interrupts */
225 if (cpu_is_omap24xx()) {
226 int i;
227 for (i = 0; i < omap_kp_data->rows; i++)
228 enable_irq(gpio_to_irq(row_gpios[i]));
229 } else {
230 omap_writew(0, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
231 kp_cur_group = -1;
232 }
233 }
234}
235
236static ssize_t omap_kp_enable_show(struct device *dev,
237 struct device_attribute *attr, char *buf)
238{
239 return sprintf(buf, "%u\n", kp_enable);
240}
241
242static ssize_t omap_kp_enable_store(struct device *dev, struct device_attribute *attr,
243 const char *buf, size_t count)
244{
245 int state;
246
247 if (sscanf(buf, "%u", &state) != 1)
248 return -EINVAL;
249
250 if ((state != 1) && (state != 0))
251 return -EINVAL;
252
253 mutex_lock(&kp_enable_mutex);
254 if (state != kp_enable) {
255 if (state)
256 enable_irq(INT_KEYBOARD);
257 else
258 disable_irq(INT_KEYBOARD);
259 kp_enable = state;
260 }
261 mutex_unlock(&kp_enable_mutex);
262
263 return strnlen(buf, count);
264}
265
266static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, omap_kp_enable_show, omap_kp_enable_store);
267
268#ifdef CONFIG_PM
269static int omap_kp_suspend(struct platform_device *dev, pm_message_t state)
270{
271 /* Nothing yet */
272
273 return 0;
274}
275
276static int omap_kp_resume(struct platform_device *dev)
277{
278 /* Nothing yet */
279
280 return 0;
281}
282#else
283#define omap_kp_suspend NULL
284#define omap_kp_resume NULL
285#endif
286
287static int __devinit omap_kp_probe(struct platform_device *pdev)
288{
289 struct omap_kp *omap_kp;
290 struct input_dev *input_dev;
291 struct omap_kp_platform_data *pdata = pdev->dev.platform_data;
292 int i, col_idx, row_idx, irq_idx, ret;
293 unsigned int row_shift, keycodemax;
294
295 if (!pdata->rows || !pdata->cols || !pdata->keymap_data) {
296 printk(KERN_ERR "No rows, cols or keymap_data from pdata\n");
297 return -EINVAL;
298 }
299
300 row_shift = get_count_order(pdata->cols);
301 keycodemax = pdata->rows << row_shift;
302
303 omap_kp = kzalloc(sizeof(struct omap_kp) +
304 keycodemax * sizeof(unsigned short), GFP_KERNEL);
305 input_dev = input_allocate_device();
306 if (!omap_kp || !input_dev) {
307 kfree(omap_kp);
308 input_free_device(input_dev);
309 return -ENOMEM;
310 }
311
312 platform_set_drvdata(pdev, omap_kp);
313
314 omap_kp->input = input_dev;
315
316 /* Disable the interrupt for the MPUIO keyboard */
317 if (!cpu_is_omap24xx())
318 omap_writew(1, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
319
320 if (pdata->delay)
321 omap_kp->delay = pdata->delay;
322
323 if (pdata->row_gpios && pdata->col_gpios) {
324 row_gpios = pdata->row_gpios;
325 col_gpios = pdata->col_gpios;
326 }
327
328 omap_kp->rows = pdata->rows;
329 omap_kp->cols = pdata->cols;
330
331 if (cpu_is_omap24xx()) {
332 /* Cols: outputs */
333 for (col_idx = 0; col_idx < omap_kp->cols; col_idx++) {
334 if (gpio_request(col_gpios[col_idx], "omap_kp_col") < 0) {
335 printk(KERN_ERR "Failed to request"
336 "GPIO%d for keypad\n",
337 col_gpios[col_idx]);
338 goto err1;
339 }
340 gpio_direction_output(col_gpios[col_idx], 0);
341 }
342 /* Rows: inputs */
343 for (row_idx = 0; row_idx < omap_kp->rows; row_idx++) {
344 if (gpio_request(row_gpios[row_idx], "omap_kp_row") < 0) {
345 printk(KERN_ERR "Failed to request"
346 "GPIO%d for keypad\n",
347 row_gpios[row_idx]);
348 goto err2;
349 }
350 gpio_direction_input(row_gpios[row_idx]);
351 }
352 } else {
353 col_idx = 0;
354 row_idx = 0;
355 }
356
357 setup_timer(&omap_kp->timer, omap_kp_timer, (unsigned long)omap_kp);
358
359 /* get the irq and init timer*/
360 tasklet_enable(&kp_tasklet);
361 kp_tasklet.data = (unsigned long) omap_kp;
362
363 ret = device_create_file(&pdev->dev, &dev_attr_enable);
364 if (ret < 0)
365 goto err2;
366
367 /* setup input device */
368 input_dev->name = "omap-keypad";
369 input_dev->phys = "omap-keypad/input0";
370 input_dev->dev.parent = &pdev->dev;
371
372 input_dev->id.bustype = BUS_HOST;
373 input_dev->id.vendor = 0x0001;
374 input_dev->id.product = 0x0001;
375 input_dev->id.version = 0x0100;
376
377 if (pdata->rep)
378 __set_bit(EV_REP, input_dev->evbit);
379
380 ret = matrix_keypad_build_keymap(pdata->keymap_data, NULL,
381 pdata->rows, pdata->cols,
382 omap_kp->keymap, input_dev);
383 if (ret < 0)
384 goto err3;
385
386 ret = input_register_device(omap_kp->input);
387 if (ret < 0) {
388 printk(KERN_ERR "Unable to register omap-keypad input device\n");
389 goto err3;
390 }
391
392 if (pdata->dbounce)
393 omap_writew(0xff, OMAP1_MPUIO_BASE + OMAP_MPUIO_GPIO_DEBOUNCING);
394
395 /* scan current status and enable interrupt */
396 omap_kp_scan_keypad(omap_kp, keypad_state);
397 if (!cpu_is_omap24xx()) {
398 omap_kp->irq = platform_get_irq(pdev, 0);
399 if (omap_kp->irq >= 0) {
400 if (request_irq(omap_kp->irq, omap_kp_interrupt, 0,
401 "omap-keypad", omap_kp) < 0)
402 goto err4;
403 }
404 omap_writew(0, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
405 } else {
406 for (irq_idx = 0; irq_idx < omap_kp->rows; irq_idx++) {
407 if (request_irq(gpio_to_irq(row_gpios[irq_idx]),
408 omap_kp_interrupt,
409 IRQF_TRIGGER_FALLING,
410 "omap-keypad", omap_kp) < 0)
411 goto err5;
412 }
413 }
414 return 0;
415err5:
416 for (i = irq_idx - 1; i >=0; i--)
417 free_irq(row_gpios[i], omap_kp);
418err4:
419 input_unregister_device(omap_kp->input);
420 input_dev = NULL;
421err3:
422 device_remove_file(&pdev->dev, &dev_attr_enable);
423err2:
424 for (i = row_idx - 1; i >=0; i--)
425 gpio_free(row_gpios[i]);
426err1:
427 for (i = col_idx - 1; i >=0; i--)
428 gpio_free(col_gpios[i]);
429
430 kfree(omap_kp);
431 input_free_device(input_dev);
432
433 return -EINVAL;
434}
435
436static int __devexit omap_kp_remove(struct platform_device *pdev)
437{
438 struct omap_kp *omap_kp = platform_get_drvdata(pdev);
439
440 /* disable keypad interrupt handling */
441 tasklet_disable(&kp_tasklet);
442 if (cpu_is_omap24xx()) {
443 int i;
444 for (i = 0; i < omap_kp->cols; i++)
445 gpio_free(col_gpios[i]);
446 for (i = 0; i < omap_kp->rows; i++) {
447 gpio_free(row_gpios[i]);
448 free_irq(gpio_to_irq(row_gpios[i]), omap_kp);
449 }
450 } else {
451 omap_writew(1, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
452 free_irq(omap_kp->irq, omap_kp);
453 }
454
455 del_timer_sync(&omap_kp->timer);
456 tasklet_kill(&kp_tasklet);
457
458 /* unregister everything */
459 input_unregister_device(omap_kp->input);
460
461 kfree(omap_kp);
462
463 return 0;
464}
465
466static struct platform_driver omap_kp_driver = {
467 .probe = omap_kp_probe,
468 .remove = __devexit_p(omap_kp_remove),
469 .suspend = omap_kp_suspend,
470 .resume = omap_kp_resume,
471 .driver = {
472 .name = "omap-keypad",
473 .owner = THIS_MODULE,
474 },
475};
476module_platform_driver(omap_kp_driver);
477
478MODULE_AUTHOR("Timo Teräs");
479MODULE_DESCRIPTION("OMAP Keypad Driver");
480MODULE_LICENSE("GPL");
481MODULE_ALIAS("platform:omap-keypad");