1/*
  2 * Copyright (C) ST-Ericsson SA 2010
  3 *
  4 * License Terms: GNU General Public License, version 2
  5 * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
  6 */
  7
  8#include <linux/module.h>
  9#include <linux/init.h>
 10#include <linux/slab.h>
 11#include <linux/input.h>
 12#include <linux/interrupt.h>
 13#include <linux/platform_device.h>
 14#include <linux/input/matrix_keypad.h>
 15#include <linux/mfd/stmpe.h>
 16
 17/* These are at the same addresses in all STMPE variants */
 18#define STMPE_KPC_COL			0x60
 19#define STMPE_KPC_ROW_MSB		0x61
 20#define STMPE_KPC_ROW_LSB		0x62
 21#define STMPE_KPC_CTRL_MSB		0x63
 22#define STMPE_KPC_CTRL_LSB		0x64
 23#define STMPE_KPC_COMBI_KEY_0		0x65
 24#define STMPE_KPC_COMBI_KEY_1		0x66
 25#define STMPE_KPC_COMBI_KEY_2		0x67
 26#define STMPE_KPC_DATA_BYTE0		0x68
 27#define STMPE_KPC_DATA_BYTE1		0x69
 28#define STMPE_KPC_DATA_BYTE2		0x6a
 29#define STMPE_KPC_DATA_BYTE3		0x6b
 30#define STMPE_KPC_DATA_BYTE4		0x6c
 31
 32#define STMPE_KPC_CTRL_LSB_SCAN		(0x1 << 0)
 33#define STMPE_KPC_CTRL_LSB_DEBOUNCE	(0x7f << 1)
 34#define STMPE_KPC_CTRL_MSB_SCAN_COUNT	(0xf << 4)
 35
 36#define STMPE_KPC_ROW_MSB_ROWS		0xff
 37
 38#define STMPE_KPC_DATA_UP		(0x1 << 7)
 39#define STMPE_KPC_DATA_ROW		(0xf << 3)
 40#define STMPE_KPC_DATA_COL		(0x7 << 0)
 41#define STMPE_KPC_DATA_NOKEY_MASK	0x78
 42
 43#define STMPE_KEYPAD_MAX_DEBOUNCE	127
 44#define STMPE_KEYPAD_MAX_SCAN_COUNT	15
 45
 46#define STMPE_KEYPAD_MAX_ROWS		8
 47#define STMPE_KEYPAD_MAX_COLS		8
 48#define STMPE_KEYPAD_ROW_SHIFT		3
 49#define STMPE_KEYPAD_KEYMAP_SIZE	\
 50	(STMPE_KEYPAD_MAX_ROWS * STMPE_KEYPAD_MAX_COLS)
 51
 52/**
 53 * struct stmpe_keypad_variant - model-specific attributes
 54 * @auto_increment: whether the KPC_DATA_BYTE register address
 55 *		    auto-increments on multiple read
 56 * @num_data: number of data bytes
 57 * @num_normal_data: number of normal keys' data bytes
 58 * @max_cols: maximum number of columns supported
 59 * @max_rows: maximum number of rows supported
 60 * @col_gpios: bitmask of gpios which can be used for columns
 61 * @row_gpios: bitmask of gpios which can be used for rows
 62 */
 63struct stmpe_keypad_variant {
 64	bool		auto_increment;
 65	int		num_data;
 66	int		num_normal_data;
 67	int		max_cols;
 68	int		max_rows;
 69	unsigned int	col_gpios;
 70	unsigned int	row_gpios;
 71};
 72
 73static const struct stmpe_keypad_variant stmpe_keypad_variants[] = {
 74	[STMPE1601] = {
 75		.auto_increment		= true,
 76		.num_data		= 5,
 77		.num_normal_data	= 3,
 78		.max_cols		= 8,
 79		.max_rows		= 8,
 80		.col_gpios		= 0x000ff,	/* GPIO 0 - 7 */
 81		.row_gpios		= 0x0ff00,	/* GPIO 8 - 15 */
 82	},
 83	[STMPE2401] = {
 84		.auto_increment		= false,
 85		.num_data		= 3,
 86		.num_normal_data	= 2,
 87		.max_cols		= 8,
 88		.max_rows		= 12,
 89		.col_gpios		= 0x0000ff,	/* GPIO 0 - 7*/
 90		.row_gpios		= 0x1fef00,	/* GPIO 8-14, 16-20 */
 91	},
 92	[STMPE2403] = {
 93		.auto_increment		= true,
 94		.num_data		= 5,
 95		.num_normal_data	= 3,
 96		.max_cols		= 8,
 97		.max_rows		= 12,
 98		.col_gpios		= 0x0000ff,	/* GPIO 0 - 7*/
 99		.row_gpios		= 0x1fef00,	/* GPIO 8-14, 16-20 */
100	},
101};
102
103struct stmpe_keypad {
104	struct stmpe *stmpe;
105	struct input_dev *input;
106	const struct stmpe_keypad_variant *variant;
107	const struct stmpe_keypad_platform_data *plat;
108
109	unsigned int rows;
110	unsigned int cols;
111
112	unsigned short keymap[STMPE_KEYPAD_KEYMAP_SIZE];
113};
114
115static int stmpe_keypad_read_data(struct stmpe_keypad *keypad, u8 *data)
116{
117	const struct stmpe_keypad_variant *variant = keypad->variant;
118	struct stmpe *stmpe = keypad->stmpe;
119	int ret;
120	int i;
121
122	if (variant->auto_increment)
123		return stmpe_block_read(stmpe, STMPE_KPC_DATA_BYTE0,
124					variant->num_data, data);
125
126	for (i = 0; i < variant->num_data; i++) {
127		ret = stmpe_reg_read(stmpe, STMPE_KPC_DATA_BYTE0 + i);
128		if (ret < 0)
129			return ret;
130
131		data[i] = ret;
132	}
133
134	return 0;
135}
136
137static irqreturn_t stmpe_keypad_irq(int irq, void *dev)
138{
139	struct stmpe_keypad *keypad = dev;
140	struct input_dev *input = keypad->input;
141	const struct stmpe_keypad_variant *variant = keypad->variant;
142	u8 fifo[variant->num_data];
143	int ret;
144	int i;
145
146	ret = stmpe_keypad_read_data(keypad, fifo);
147	if (ret < 0)
148		return IRQ_NONE;
149
150	for (i = 0; i < variant->num_normal_data; i++) {
151		u8 data = fifo[i];
152		int row = (data & STMPE_KPC_DATA_ROW) >> 3;
153		int col = data & STMPE_KPC_DATA_COL;
154		int code = MATRIX_SCAN_CODE(row, col, STMPE_KEYPAD_ROW_SHIFT);
155		bool up = data & STMPE_KPC_DATA_UP;
156
157		if ((data & STMPE_KPC_DATA_NOKEY_MASK)
158			== STMPE_KPC_DATA_NOKEY_MASK)
159			continue;
160
161		input_event(input, EV_MSC, MSC_SCAN, code);
162		input_report_key(input, keypad->keymap[code], !up);
163		input_sync(input);
164	}
165
166	return IRQ_HANDLED;
167}
168
169static int __devinit stmpe_keypad_altfunc_init(struct stmpe_keypad *keypad)
170{
171	const struct stmpe_keypad_variant *variant = keypad->variant;
172	unsigned int col_gpios = variant->col_gpios;
173	unsigned int row_gpios = variant->row_gpios;
174	struct stmpe *stmpe = keypad->stmpe;
175	unsigned int pins = 0;
176	int i;
177
178	/*
179	 * Figure out which pins need to be set to the keypad alternate
180	 * function.
181	 *
182	 * {cols,rows}_gpios are bitmasks of which pins on the chip can be used
183	 * for the keypad.
184	 *
185	 * keypad->{cols,rows} are a bitmask of which pins (of the ones useable
186	 * for the keypad) are used on the board.
187	 */
188
189	for (i = 0; i < variant->max_cols; i++) {
190		int num = __ffs(col_gpios);
191
192		if (keypad->cols & (1 << i))
193			pins |= 1 << num;
194
195		col_gpios &= ~(1 << num);
196	}
197
198	for (i = 0; i < variant->max_rows; i++) {
199		int num = __ffs(row_gpios);
200
201		if (keypad->rows & (1 << i))
202			pins |= 1 << num;
203
204		row_gpios &= ~(1 << num);
205	}
206
207	return stmpe_set_altfunc(stmpe, pins, STMPE_BLOCK_KEYPAD);
208}
209
210static int __devinit stmpe_keypad_chip_init(struct stmpe_keypad *keypad)
211{
212	const struct stmpe_keypad_platform_data *plat = keypad->plat;
213	const struct stmpe_keypad_variant *variant = keypad->variant;
214	struct stmpe *stmpe = keypad->stmpe;
215	int ret;
216
217	if (plat->debounce_ms > STMPE_KEYPAD_MAX_DEBOUNCE)
218		return -EINVAL;
219
220	if (plat->scan_count > STMPE_KEYPAD_MAX_SCAN_COUNT)
221		return -EINVAL;
222
223	ret = stmpe_enable(stmpe, STMPE_BLOCK_KEYPAD);
224	if (ret < 0)
225		return ret;
226
227	ret = stmpe_keypad_altfunc_init(keypad);
228	if (ret < 0)
229		return ret;
230
231	ret = stmpe_reg_write(stmpe, STMPE_KPC_COL, keypad->cols);
232	if (ret < 0)
233		return ret;
234
235	ret = stmpe_reg_write(stmpe, STMPE_KPC_ROW_LSB, keypad->rows);
236	if (ret < 0)
237		return ret;
238
239	if (variant->max_rows > 8) {
240		ret = stmpe_set_bits(stmpe, STMPE_KPC_ROW_MSB,
241				     STMPE_KPC_ROW_MSB_ROWS,
242				     keypad->rows >> 8);
243		if (ret < 0)
244			return ret;
245	}
246
247	ret = stmpe_set_bits(stmpe, STMPE_KPC_CTRL_MSB,
248			     STMPE_KPC_CTRL_MSB_SCAN_COUNT,
249			     plat->scan_count << 4);
250	if (ret < 0)
251		return ret;
252
253	return stmpe_set_bits(stmpe, STMPE_KPC_CTRL_LSB,
254			      STMPE_KPC_CTRL_LSB_SCAN |
255			      STMPE_KPC_CTRL_LSB_DEBOUNCE,
256			      STMPE_KPC_CTRL_LSB_SCAN |
257			      (plat->debounce_ms << 1));
258}
259
260static int __devinit stmpe_keypad_probe(struct platform_device *pdev)
261{
262	struct stmpe *stmpe = dev_get_drvdata(pdev->dev.parent);
263	struct stmpe_keypad_platform_data *plat;
264	struct stmpe_keypad *keypad;
265	struct input_dev *input;
266	int ret;
267	int irq;
268	int i;
269
270	plat = stmpe->pdata->keypad;
271	if (!plat)
272		return -ENODEV;
273
274	irq = platform_get_irq(pdev, 0);
275	if (irq < 0)
276		return irq;
277
278	keypad = kzalloc(sizeof(struct stmpe_keypad), GFP_KERNEL);
279	if (!keypad)
280		return -ENOMEM;
281
282	input = input_allocate_device();
283	if (!input) {
284		ret = -ENOMEM;
285		goto out_freekeypad;
286	}
287
288	input->name = "STMPE keypad";
289	input->id.bustype = BUS_I2C;
290	input->dev.parent = &pdev->dev;
291
292	input_set_capability(input, EV_MSC, MSC_SCAN);
 
 
 
 
 
293
294	__set_bit(EV_KEY, input->evbit);
295	if (!plat->no_autorepeat)
296		__set_bit(EV_REP, input->evbit);
297
298	input->keycode = keypad->keymap;
299	input->keycodesize = sizeof(keypad->keymap[0]);
300	input->keycodemax = ARRAY_SIZE(keypad->keymap);
301
302	matrix_keypad_build_keymap(plat->keymap_data, STMPE_KEYPAD_ROW_SHIFT,
303				   input->keycode, input->keybit);
304
305	for (i = 0; i < plat->keymap_data->keymap_size; i++) {
306		unsigned int key = plat->keymap_data->keymap[i];
307
308		keypad->cols |= 1 << KEY_COL(key);
309		keypad->rows |= 1 << KEY_ROW(key);
310	}
311
312	keypad->stmpe = stmpe;
313	keypad->plat = plat;
314	keypad->input = input;
315	keypad->variant = &stmpe_keypad_variants[stmpe->partnum];
316
317	ret = stmpe_keypad_chip_init(keypad);
318	if (ret < 0)
319		goto out_freeinput;
320
321	ret = input_register_device(input);
322	if (ret) {
323		dev_err(&pdev->dev,
324			"unable to register input device: %d\n", ret);
325		goto out_freeinput;
326	}
327
328	ret = request_threaded_irq(irq, NULL, stmpe_keypad_irq, IRQF_ONESHOT,
329				   "stmpe-keypad", keypad);
330	if (ret) {
331		dev_err(&pdev->dev, "unable to get irq: %d\n", ret);
332		goto out_unregisterinput;
333	}
334
335	platform_set_drvdata(pdev, keypad);
336
337	return 0;
338
339out_unregisterinput:
340	input_unregister_device(input);
341	input = NULL;
342out_freeinput:
343	input_free_device(input);
344out_freekeypad:
345	kfree(keypad);
346	return ret;
347}
348
349static int __devexit stmpe_keypad_remove(struct platform_device *pdev)
350{
351	struct stmpe_keypad *keypad = platform_get_drvdata(pdev);
352	struct stmpe *stmpe = keypad->stmpe;
353	int irq = platform_get_irq(pdev, 0);
354
355	stmpe_disable(stmpe, STMPE_BLOCK_KEYPAD);
356
357	free_irq(irq, keypad);
358	input_unregister_device(keypad->input);
359	platform_set_drvdata(pdev, NULL);
360	kfree(keypad);
361
362	return 0;
363}
364
365static struct platform_driver stmpe_keypad_driver = {
366	.driver.name	= "stmpe-keypad",
367	.driver.owner	= THIS_MODULE,
368	.probe		= stmpe_keypad_probe,
369	.remove		= __devexit_p(stmpe_keypad_remove),
370};
371
372static int __init stmpe_keypad_init(void)
373{
374	return platform_driver_register(&stmpe_keypad_driver);
375}
376module_init(stmpe_keypad_init);
377
378static void __exit stmpe_keypad_exit(void)
379{
380	platform_driver_unregister(&stmpe_keypad_driver);
381}
382module_exit(stmpe_keypad_exit);
383
384MODULE_LICENSE("GPL v2");
385MODULE_DESCRIPTION("STMPExxxx keypad driver");
386MODULE_AUTHOR("Rabin Vincent <rabin.vincent@stericsson.com>");

  1/*
  2 * Copyright (C) ST-Ericsson SA 2010
  3 *
  4 * License Terms: GNU General Public License, version 2
  5 * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
  6 */
  7
  8#include <linux/module.h>
  9#include <linux/init.h>
 10#include <linux/slab.h>
 11#include <linux/input.h>
 12#include <linux/interrupt.h>
 13#include <linux/platform_device.h>
 14#include <linux/input/matrix_keypad.h>
 15#include <linux/mfd/stmpe.h>
 16
 17/* These are at the same addresses in all STMPE variants */
 18#define STMPE_KPC_COL			0x60
 19#define STMPE_KPC_ROW_MSB		0x61
 20#define STMPE_KPC_ROW_LSB		0x62
 21#define STMPE_KPC_CTRL_MSB		0x63
 22#define STMPE_KPC_CTRL_LSB		0x64
 23#define STMPE_KPC_COMBI_KEY_0		0x65
 24#define STMPE_KPC_COMBI_KEY_1		0x66
 25#define STMPE_KPC_COMBI_KEY_2		0x67
 26#define STMPE_KPC_DATA_BYTE0		0x68
 27#define STMPE_KPC_DATA_BYTE1		0x69
 28#define STMPE_KPC_DATA_BYTE2		0x6a
 29#define STMPE_KPC_DATA_BYTE3		0x6b
 30#define STMPE_KPC_DATA_BYTE4		0x6c
 31
 32#define STMPE_KPC_CTRL_LSB_SCAN		(0x1 << 0)
 33#define STMPE_KPC_CTRL_LSB_DEBOUNCE	(0x7f << 1)
 34#define STMPE_KPC_CTRL_MSB_SCAN_COUNT	(0xf << 4)
 35
 36#define STMPE_KPC_ROW_MSB_ROWS		0xff
 37
 38#define STMPE_KPC_DATA_UP		(0x1 << 7)
 39#define STMPE_KPC_DATA_ROW		(0xf << 3)
 40#define STMPE_KPC_DATA_COL		(0x7 << 0)
 41#define STMPE_KPC_DATA_NOKEY_MASK	0x78
 42
 43#define STMPE_KEYPAD_MAX_DEBOUNCE	127
 44#define STMPE_KEYPAD_MAX_SCAN_COUNT	15
 45
 46#define STMPE_KEYPAD_MAX_ROWS		8
 47#define STMPE_KEYPAD_MAX_COLS		8
 48#define STMPE_KEYPAD_ROW_SHIFT		3
 49#define STMPE_KEYPAD_KEYMAP_SIZE	\
 50	(STMPE_KEYPAD_MAX_ROWS * STMPE_KEYPAD_MAX_COLS)
 51
 52/**
 53 * struct stmpe_keypad_variant - model-specific attributes
 54 * @auto_increment: whether the KPC_DATA_BYTE register address
 55 *		    auto-increments on multiple read
 56 * @num_data: number of data bytes
 57 * @num_normal_data: number of normal keys' data bytes
 58 * @max_cols: maximum number of columns supported
 59 * @max_rows: maximum number of rows supported
 60 * @col_gpios: bitmask of gpios which can be used for columns
 61 * @row_gpios: bitmask of gpios which can be used for rows
 62 */
 63struct stmpe_keypad_variant {
 64	bool		auto_increment;
 65	int		num_data;
 66	int		num_normal_data;
 67	int		max_cols;
 68	int		max_rows;
 69	unsigned int	col_gpios;
 70	unsigned int	row_gpios;
 71};
 72
 73static const struct stmpe_keypad_variant stmpe_keypad_variants[] = {
 74	[STMPE1601] = {
 75		.auto_increment		= true,
 76		.num_data		= 5,
 77		.num_normal_data	= 3,
 78		.max_cols		= 8,
 79		.max_rows		= 8,
 80		.col_gpios		= 0x000ff,	/* GPIO 0 - 7 */
 81		.row_gpios		= 0x0ff00,	/* GPIO 8 - 15 */
 82	},
 83	[STMPE2401] = {
 84		.auto_increment		= false,
 85		.num_data		= 3,
 86		.num_normal_data	= 2,
 87		.max_cols		= 8,
 88		.max_rows		= 12,
 89		.col_gpios		= 0x0000ff,	/* GPIO 0 - 7*/
 90		.row_gpios		= 0x1fef00,	/* GPIO 8-14, 16-20 */
 91	},
 92	[STMPE2403] = {
 93		.auto_increment		= true,
 94		.num_data		= 5,
 95		.num_normal_data	= 3,
 96		.max_cols		= 8,
 97		.max_rows		= 12,
 98		.col_gpios		= 0x0000ff,	/* GPIO 0 - 7*/
 99		.row_gpios		= 0x1fef00,	/* GPIO 8-14, 16-20 */
100	},
101};
102
103struct stmpe_keypad {
104	struct stmpe *stmpe;
105	struct input_dev *input;
106	const struct stmpe_keypad_variant *variant;
107	const struct stmpe_keypad_platform_data *plat;
108
109	unsigned int rows;
110	unsigned int cols;
111
112	unsigned short keymap[STMPE_KEYPAD_KEYMAP_SIZE];
113};
114
115static int stmpe_keypad_read_data(struct stmpe_keypad *keypad, u8 *data)
116{
117	const struct stmpe_keypad_variant *variant = keypad->variant;
118	struct stmpe *stmpe = keypad->stmpe;
119	int ret;
120	int i;
121
122	if (variant->auto_increment)
123		return stmpe_block_read(stmpe, STMPE_KPC_DATA_BYTE0,
124					variant->num_data, data);
125
126	for (i = 0; i < variant->num_data; i++) {
127		ret = stmpe_reg_read(stmpe, STMPE_KPC_DATA_BYTE0 + i);
128		if (ret < 0)
129			return ret;
130
131		data[i] = ret;
132	}
133
134	return 0;
135}
136
137static irqreturn_t stmpe_keypad_irq(int irq, void *dev)
138{
139	struct stmpe_keypad *keypad = dev;
140	struct input_dev *input = keypad->input;
141	const struct stmpe_keypad_variant *variant = keypad->variant;
142	u8 fifo[variant->num_data];
143	int ret;
144	int i;
145
146	ret = stmpe_keypad_read_data(keypad, fifo);
147	if (ret < 0)
148		return IRQ_NONE;
149
150	for (i = 0; i < variant->num_normal_data; i++) {
151		u8 data = fifo[i];
152		int row = (data & STMPE_KPC_DATA_ROW) >> 3;
153		int col = data & STMPE_KPC_DATA_COL;
154		int code = MATRIX_SCAN_CODE(row, col, STMPE_KEYPAD_ROW_SHIFT);
155		bool up = data & STMPE_KPC_DATA_UP;
156
157		if ((data & STMPE_KPC_DATA_NOKEY_MASK)
158			== STMPE_KPC_DATA_NOKEY_MASK)
159			continue;
160
161		input_event(input, EV_MSC, MSC_SCAN, code);
162		input_report_key(input, keypad->keymap[code], !up);
163		input_sync(input);
164	}
165
166	return IRQ_HANDLED;
167}
168
169static int __devinit stmpe_keypad_altfunc_init(struct stmpe_keypad *keypad)
170{
171	const struct stmpe_keypad_variant *variant = keypad->variant;
172	unsigned int col_gpios = variant->col_gpios;
173	unsigned int row_gpios = variant->row_gpios;
174	struct stmpe *stmpe = keypad->stmpe;
175	unsigned int pins = 0;
176	int i;
177
178	/*
179	 * Figure out which pins need to be set to the keypad alternate
180	 * function.
181	 *
182	 * {cols,rows}_gpios are bitmasks of which pins on the chip can be used
183	 * for the keypad.
184	 *
185	 * keypad->{cols,rows} are a bitmask of which pins (of the ones useable
186	 * for the keypad) are used on the board.
187	 */
188
189	for (i = 0; i < variant->max_cols; i++) {
190		int num = __ffs(col_gpios);
191
192		if (keypad->cols & (1 << i))
193			pins |= 1 << num;
194
195		col_gpios &= ~(1 << num);
196	}
197
198	for (i = 0; i < variant->max_rows; i++) {
199		int num = __ffs(row_gpios);
200
201		if (keypad->rows & (1 << i))
202			pins |= 1 << num;
203
204		row_gpios &= ~(1 << num);
205	}
206
207	return stmpe_set_altfunc(stmpe, pins, STMPE_BLOCK_KEYPAD);
208}
209
210static int __devinit stmpe_keypad_chip_init(struct stmpe_keypad *keypad)
211{
212	const struct stmpe_keypad_platform_data *plat = keypad->plat;
213	const struct stmpe_keypad_variant *variant = keypad->variant;
214	struct stmpe *stmpe = keypad->stmpe;
215	int ret;
216
217	if (plat->debounce_ms > STMPE_KEYPAD_MAX_DEBOUNCE)
218		return -EINVAL;
219
220	if (plat->scan_count > STMPE_KEYPAD_MAX_SCAN_COUNT)
221		return -EINVAL;
222
223	ret = stmpe_enable(stmpe, STMPE_BLOCK_KEYPAD);
224	if (ret < 0)
225		return ret;
226
227	ret = stmpe_keypad_altfunc_init(keypad);
228	if (ret < 0)
229		return ret;
230
231	ret = stmpe_reg_write(stmpe, STMPE_KPC_COL, keypad->cols);
232	if (ret < 0)
233		return ret;
234
235	ret = stmpe_reg_write(stmpe, STMPE_KPC_ROW_LSB, keypad->rows);
236	if (ret < 0)
237		return ret;
238
239	if (variant->max_rows > 8) {
240		ret = stmpe_set_bits(stmpe, STMPE_KPC_ROW_MSB,
241				     STMPE_KPC_ROW_MSB_ROWS,
242				     keypad->rows >> 8);
243		if (ret < 0)
244			return ret;
245	}
246
247	ret = stmpe_set_bits(stmpe, STMPE_KPC_CTRL_MSB,
248			     STMPE_KPC_CTRL_MSB_SCAN_COUNT,
249			     plat->scan_count << 4);
250	if (ret < 0)
251		return ret;
252
253	return stmpe_set_bits(stmpe, STMPE_KPC_CTRL_LSB,
254			      STMPE_KPC_CTRL_LSB_SCAN |
255			      STMPE_KPC_CTRL_LSB_DEBOUNCE,
256			      STMPE_KPC_CTRL_LSB_SCAN |
257			      (plat->debounce_ms << 1));
258}
259
260static int __devinit stmpe_keypad_probe(struct platform_device *pdev)
261{
262	struct stmpe *stmpe = dev_get_drvdata(pdev->dev.parent);
263	struct stmpe_keypad_platform_data *plat;
264	struct stmpe_keypad *keypad;
265	struct input_dev *input;
266	int ret;
267	int irq;
268	int i;
269
270	plat = stmpe->pdata->keypad;
271	if (!plat)
272		return -ENODEV;
273
274	irq = platform_get_irq(pdev, 0);
275	if (irq < 0)
276		return irq;
277
278	keypad = kzalloc(sizeof(struct stmpe_keypad), GFP_KERNEL);
279	if (!keypad)
280		return -ENOMEM;
281
282	input = input_allocate_device();
283	if (!input) {
284		ret = -ENOMEM;
285		goto out_freekeypad;
286	}
287
288	input->name = "STMPE keypad";
289	input->id.bustype = BUS_I2C;
290	input->dev.parent = &pdev->dev;
291
292	ret = matrix_keypad_build_keymap(plat->keymap_data, NULL,
293					 STMPE_KEYPAD_MAX_ROWS,
294					 STMPE_KEYPAD_MAX_COLS,
295					 keypad->keymap, input);
296	if (ret)
297		goto out_freeinput;
298
299	input_set_capability(input, EV_MSC, MSC_SCAN);
300	if (!plat->no_autorepeat)
301		__set_bit(EV_REP, input->evbit);
302
 
 
 
 
 
 
 
303	for (i = 0; i < plat->keymap_data->keymap_size; i++) {
304		unsigned int key = plat->keymap_data->keymap[i];
305
306		keypad->cols |= 1 << KEY_COL(key);
307		keypad->rows |= 1 << KEY_ROW(key);
308	}
309
310	keypad->stmpe = stmpe;
311	keypad->plat = plat;
312	keypad->input = input;
313	keypad->variant = &stmpe_keypad_variants[stmpe->partnum];
314
315	ret = stmpe_keypad_chip_init(keypad);
316	if (ret < 0)
317		goto out_freeinput;
318
319	ret = input_register_device(input);
320	if (ret) {
321		dev_err(&pdev->dev,
322			"unable to register input device: %d\n", ret);
323		goto out_freeinput;
324	}
325
326	ret = request_threaded_irq(irq, NULL, stmpe_keypad_irq, IRQF_ONESHOT,
327				   "stmpe-keypad", keypad);
328	if (ret) {
329		dev_err(&pdev->dev, "unable to get irq: %d\n", ret);
330		goto out_unregisterinput;
331	}
332
333	platform_set_drvdata(pdev, keypad);
334
335	return 0;
336
337out_unregisterinput:
338	input_unregister_device(input);
339	input = NULL;
340out_freeinput:
341	input_free_device(input);
342out_freekeypad:
343	kfree(keypad);
344	return ret;
345}
346
347static int __devexit stmpe_keypad_remove(struct platform_device *pdev)
348{
349	struct stmpe_keypad *keypad = platform_get_drvdata(pdev);
350	struct stmpe *stmpe = keypad->stmpe;
351	int irq = platform_get_irq(pdev, 0);
352
353	stmpe_disable(stmpe, STMPE_BLOCK_KEYPAD);
354
355	free_irq(irq, keypad);
356	input_unregister_device(keypad->input);
357	platform_set_drvdata(pdev, NULL);
358	kfree(keypad);
359
360	return 0;
361}
362
363static struct platform_driver stmpe_keypad_driver = {
364	.driver.name	= "stmpe-keypad",
365	.driver.owner	= THIS_MODULE,
366	.probe		= stmpe_keypad_probe,
367	.remove		= __devexit_p(stmpe_keypad_remove),
368};
369module_platform_driver(stmpe_keypad_driver);
 
 
 
 
 
 
 
 
 
 
 
370
371MODULE_LICENSE("GPL v2");
372MODULE_DESCRIPTION("STMPExxxx keypad driver");
373MODULE_AUTHOR("Rabin Vincent <rabin.vincent@stericsson.com>");