blob: 5dad30a4b15368bb5444a99d8f53e071275a0969 [file] [log] [blame]
Lauri Leukkunen37bd4462011-03-16 22:07:36 -07001/*
2 * TSC2005 touchscreen driver
3 *
4 * Copyright (C) 2006-2010 Nokia Corporation
5 *
6 * Author: Lauri Leukkunen <lauri.leukkunen@nokia.com>
7 * based on TSC2301 driver by Klaus K. Pedersen <klaus.k.pedersen@nokia.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
25#include <linux/kernel.h>
26#include <linux/module.h>
27#include <linux/input.h>
28#include <linux/interrupt.h>
29#include <linux/delay.h>
30#include <linux/spi/spi.h>
31#include <linux/spi/tsc2005.h>
32
33/*
34 * The touchscreen interface operates as follows:
35 *
36 * 1) Pen is pressed against the touchscreen.
37 * 2) TSC2005 performs AD conversion.
38 * 3) After the conversion is done TSC2005 drives DAV line down.
39 * 4) GPIO IRQ is received and tsc2005_irq_thread() is scheduled.
40 * 5) tsc2005_irq_thread() queues up an spi transfer to fetch the x, y, z1, z2
41 * values.
42 * 6) tsc2005_irq_thread() reports coordinates to input layer and sets up
43 * tsc2005_penup_timer() to be called after TSC2005_PENUP_TIME_MS (40ms).
44 * 7) When the penup timer expires, there have not been touch or DAV interrupts
45 * during the last 40ms which means the pen has been lifted.
46 *
47 * ESD recovery via a hardware reset is done if the TSC2005 doesn't respond
48 * after a configurable period (in ms) of activity. If esd_timeout is 0, the
49 * watchdog is disabled.
50 */
51
52/* control byte 1 */
53#define TSC2005_CMD 0x80
54#define TSC2005_CMD_NORMAL 0x00
55#define TSC2005_CMD_STOP 0x01
56#define TSC2005_CMD_12BIT 0x04
57
58/* control byte 0 */
59#define TSC2005_REG_READ 0x0001
60#define TSC2005_REG_PND0 0x0002
61#define TSC2005_REG_X 0x0000
62#define TSC2005_REG_Y 0x0008
63#define TSC2005_REG_Z1 0x0010
64#define TSC2005_REG_Z2 0x0018
65#define TSC2005_REG_TEMP_HIGH 0x0050
66#define TSC2005_REG_CFR0 0x0060
67#define TSC2005_REG_CFR1 0x0068
68#define TSC2005_REG_CFR2 0x0070
69
70/* configuration register 0 */
71#define TSC2005_CFR0_PRECHARGE_276US 0x0040
72#define TSC2005_CFR0_STABTIME_1MS 0x0300
73#define TSC2005_CFR0_CLOCK_1MHZ 0x1000
74#define TSC2005_CFR0_RESOLUTION12 0x2000
75#define TSC2005_CFR0_PENMODE 0x8000
76#define TSC2005_CFR0_INITVALUE (TSC2005_CFR0_STABTIME_1MS | \
77 TSC2005_CFR0_CLOCK_1MHZ | \
78 TSC2005_CFR0_RESOLUTION12 | \
79 TSC2005_CFR0_PRECHARGE_276US | \
80 TSC2005_CFR0_PENMODE)
81
82/* bits common to both read and write of configuration register 0 */
83#define TSC2005_CFR0_RW_MASK 0x3fff
84
85/* configuration register 1 */
86#define TSC2005_CFR1_BATCHDELAY_4MS 0x0003
87#define TSC2005_CFR1_INITVALUE TSC2005_CFR1_BATCHDELAY_4MS
88
89/* configuration register 2 */
90#define TSC2005_CFR2_MAVE_Z 0x0004
91#define TSC2005_CFR2_MAVE_Y 0x0008
92#define TSC2005_CFR2_MAVE_X 0x0010
93#define TSC2005_CFR2_AVG_7 0x0800
94#define TSC2005_CFR2_MEDIUM_15 0x3000
95#define TSC2005_CFR2_INITVALUE (TSC2005_CFR2_MAVE_X | \
96 TSC2005_CFR2_MAVE_Y | \
97 TSC2005_CFR2_MAVE_Z | \
98 TSC2005_CFR2_MEDIUM_15 | \
99 TSC2005_CFR2_AVG_7)
100
101#define MAX_12BIT 0xfff
102#define TSC2005_SPI_MAX_SPEED_HZ 10000000
103#define TSC2005_PENUP_TIME_MS 40
104
105struct tsc2005_spi_rd {
106 struct spi_transfer spi_xfer;
107 u32 spi_tx;
108 u32 spi_rx;
109};
110
111struct tsc2005 {
112 struct spi_device *spi;
113
114 struct spi_message spi_read_msg;
115 struct tsc2005_spi_rd spi_x;
116 struct tsc2005_spi_rd spi_y;
117 struct tsc2005_spi_rd spi_z1;
118 struct tsc2005_spi_rd spi_z2;
119
120 struct input_dev *idev;
121 char phys[32];
122
123 struct mutex mutex;
124
125 /* raw copy of previous x,y,z */
126 int in_x;
127 int in_y;
128 int in_z1;
129 int in_z2;
130
131 struct timer_list penup_timer;
132 struct work_struct penup_work;
133
134 unsigned int esd_timeout;
135 struct timer_list esd_timer;
136 struct work_struct esd_work;
137
138 unsigned int x_plate_ohm;
139
140 bool disabled;
141 unsigned int disable_depth;
142 unsigned int pen_down;
143
144 void (*set_reset)(bool enable);
145};
146
147static void tsc2005_cmd(struct tsc2005 *ts, u8 cmd)
148{
149 u8 tx;
150 struct spi_message msg;
151 struct spi_transfer xfer = { 0 };
152
153 tx = TSC2005_CMD | TSC2005_CMD_12BIT | cmd;
154
155 xfer.tx_buf = &tx;
156 xfer.rx_buf = NULL;
157 xfer.len = 1;
158 xfer.bits_per_word = 8;
159
160 spi_message_init(&msg);
161 spi_message_add_tail(&xfer, &msg);
162 spi_sync(ts->spi, &msg);
163}
164
165static void tsc2005_write(struct tsc2005 *ts, u8 reg, u16 value)
166{
167 u32 tx;
168 struct spi_message msg;
169 struct spi_transfer xfer = { 0 };
170
171 tx = (reg | TSC2005_REG_PND0) << 16;
172 tx |= value;
173
174 xfer.tx_buf = &tx;
175 xfer.rx_buf = NULL;
176 xfer.len = 4;
177 xfer.bits_per_word = 24;
178
179 spi_message_init(&msg);
180 spi_message_add_tail(&xfer, &msg);
181 spi_sync(ts->spi, &msg);
182}
183
184static void tsc2005_setup_read(struct tsc2005_spi_rd *rd, u8 reg, bool last)
185{
186 rd->spi_tx = (reg | TSC2005_REG_READ) << 16;
187 rd->spi_xfer.tx_buf = &rd->spi_tx;
188 rd->spi_xfer.rx_buf = &rd->spi_rx;
189 rd->spi_xfer.len = 4;
190 rd->spi_xfer.bits_per_word = 24;
191 rd->spi_xfer.cs_change = !last;
192}
193
194static void tsc2005_read(struct tsc2005 *ts, u8 reg, u16 *value)
195{
196 struct spi_message msg;
197 struct tsc2005_spi_rd spi_rd = { { 0 }, 0, 0 };
198
199 tsc2005_setup_read(&spi_rd, reg, 1);
200
201 spi_message_init(&msg);
202 spi_message_add_tail(&spi_rd.spi_xfer, &msg);
203 spi_sync(ts->spi, &msg);
204 *value = spi_rd.spi_rx;
205}
206
207static void tsc2005_update_pen_state(struct tsc2005 *ts,
208 int x, int y, int pressure)
209{
210 if (pressure) {
211 input_report_abs(ts->idev, ABS_X, x);
212 input_report_abs(ts->idev, ABS_Y, y);
213 input_report_abs(ts->idev, ABS_PRESSURE, pressure);
214 if (!ts->pen_down) {
215 input_report_key(ts->idev, BTN_TOUCH, !!pressure);
216 ts->pen_down = 1;
217 }
218 } else {
219 input_report_abs(ts->idev, ABS_PRESSURE, 0);
220 if (ts->pen_down) {
221 input_report_key(ts->idev, BTN_TOUCH, 0);
222 ts->pen_down = 0;
223 }
224 }
225 input_sync(ts->idev);
226 dev_dbg(&ts->spi->dev, "point(%4d,%4d), pressure (%4d)\n", x, y,
227 pressure);
228}
229
230static irqreturn_t tsc2005_irq_handler(int irq, void *dev_id)
231{
232 struct tsc2005 *ts = dev_id;
233
234 /* update the penup timer only if it's pending */
235 mod_timer_pending(&ts->penup_timer,
236 jiffies + msecs_to_jiffies(TSC2005_PENUP_TIME_MS));
237
238 return IRQ_WAKE_THREAD;
239}
240
241static irqreturn_t tsc2005_irq_thread(int irq, void *_ts)
242{
243 struct tsc2005 *ts = _ts;
244 unsigned int pressure;
245 u32 x;
246 u32 y;
247 u32 z1;
248 u32 z2;
249
250 mutex_lock(&ts->mutex);
251
252 if (unlikely(ts->disable_depth))
253 goto out;
254
255 /* read the coordinates */
256 spi_sync(ts->spi, &ts->spi_read_msg);
257 x = ts->spi_x.spi_rx;
258 y = ts->spi_y.spi_rx;
259 z1 = ts->spi_z1.spi_rx;
260 z2 = ts->spi_z2.spi_rx;
261
262 /* validate position */
263 if (unlikely(x > MAX_12BIT || y > MAX_12BIT))
264 goto out;
265
266 /* skip coords if the pressure components are out of range */
267 if (unlikely(z1 == 0 || z2 > MAX_12BIT || z1 >= z2))
268 goto out;
269
270 /* skip point if this is a pen down with the exact same values as
271 * the value before pen-up - that implies SPI fed us stale data
272 */
273 if (!ts->pen_down &&
274 ts->in_x == x &&
275 ts->in_y == y &&
276 ts->in_z1 == z1 &&
277 ts->in_z2 == z2)
278 goto out;
279
280 /* At this point we are happy we have a valid and useful reading.
281 * Remember it for later comparisons. We may now begin downsampling
282 */
283 ts->in_x = x;
284 ts->in_y = y;
285 ts->in_z1 = z1;
286 ts->in_z2 = z2;
287
288 /* compute touch pressure resistance using equation #1 */
289 pressure = x * (z2 - z1) / z1;
290 pressure = pressure * ts->x_plate_ohm / 4096;
291 if (unlikely(pressure > MAX_12BIT))
292 goto out;
293
294 tsc2005_update_pen_state(ts, x, y, pressure);
295
296 /* set the penup timer */
297 mod_timer(&ts->penup_timer,
298 jiffies + msecs_to_jiffies(TSC2005_PENUP_TIME_MS));
299
300 if (!ts->esd_timeout)
301 goto out;
302
303 /* update the watchdog timer */
304 mod_timer(&ts->esd_timer,
305 round_jiffies(jiffies + msecs_to_jiffies(ts->esd_timeout)));
306
307out:
308 mutex_unlock(&ts->mutex);
309 return IRQ_HANDLED;
310}
311
312static void tsc2005_penup_timer(unsigned long data)
313{
314 struct tsc2005 *ts = (struct tsc2005 *)data;
315
316 schedule_work(&ts->penup_work);
317}
318
319static void tsc2005_penup_work(struct work_struct *work)
320{
321 struct tsc2005 *ts = container_of(work, struct tsc2005, penup_work);
322
323 mutex_lock(&ts->mutex);
324 tsc2005_update_pen_state(ts, 0, 0, 0);
325 mutex_unlock(&ts->mutex);
326}
327
328static void tsc2005_start_scan(struct tsc2005 *ts)
329{
330 tsc2005_write(ts, TSC2005_REG_CFR0, TSC2005_CFR0_INITVALUE);
331 tsc2005_write(ts, TSC2005_REG_CFR1, TSC2005_CFR1_INITVALUE);
332 tsc2005_write(ts, TSC2005_REG_CFR2, TSC2005_CFR2_INITVALUE);
333 tsc2005_cmd(ts, TSC2005_CMD_NORMAL);
334}
335
336static void tsc2005_stop_scan(struct tsc2005 *ts)
337{
338 tsc2005_cmd(ts, TSC2005_CMD_STOP);
339}
340
341/* must be called with mutex held */
342static void tsc2005_disable(struct tsc2005 *ts)
343{
344 if (ts->disable_depth++ != 0)
345 return;
346 disable_irq(ts->spi->irq);
347 if (ts->esd_timeout)
348 del_timer_sync(&ts->esd_timer);
349 del_timer_sync(&ts->penup_timer);
350 tsc2005_stop_scan(ts);
351}
352
353/* must be called with mutex held */
354static void tsc2005_enable(struct tsc2005 *ts)
355{
356 if (--ts->disable_depth != 0)
357 return;
358 tsc2005_start_scan(ts);
359 enable_irq(ts->spi->irq);
360 if (!ts->esd_timeout)
361 return;
362 mod_timer(&ts->esd_timer,
363 round_jiffies(jiffies + msecs_to_jiffies(ts->esd_timeout)));
364}
365
366static ssize_t tsc2005_disable_show(struct device *dev,
367 struct device_attribute *attr, char *buf)
368{
Dmitry Torokhov6b007d62011-03-16 22:08:08 -0700369 struct spi_device *spi = to_spi_device(dev);
370 struct tsc2005 *ts = spi_get_drvdata(spi);
Lauri Leukkunen37bd4462011-03-16 22:07:36 -0700371
372 return sprintf(buf, "%u\n", ts->disabled);
373}
374
375static ssize_t tsc2005_disable_store(struct device *dev,
376 struct device_attribute *attr,
377 const char *buf, size_t count)
378{
Dmitry Torokhov6b007d62011-03-16 22:08:08 -0700379 struct spi_device *spi = to_spi_device(dev);
380 struct tsc2005 *ts = spi_get_drvdata(spi);
Lauri Leukkunen37bd4462011-03-16 22:07:36 -0700381 unsigned long res;
382 int i;
383
384 if (strict_strtoul(buf, 10, &res) < 0)
385 return -EINVAL;
386 i = res ? 1 : 0;
387
388 mutex_lock(&ts->mutex);
389 if (i == ts->disabled)
390 goto out;
391 ts->disabled = i;
392 if (i)
393 tsc2005_disable(ts);
394 else
395 tsc2005_enable(ts);
396out:
397 mutex_unlock(&ts->mutex);
398 return count;
399}
400static DEVICE_ATTR(disable, 0664, tsc2005_disable_show, tsc2005_disable_store);
401
402static ssize_t tsc2005_selftest_show(struct device *dev,
403 struct device_attribute *attr,
404 char *buf)
405{
Dmitry Torokhov6b007d62011-03-16 22:08:08 -0700406 struct spi_device *spi = to_spi_device(dev);
407 struct tsc2005 *ts = spi_get_drvdata(spi);
Lauri Leukkunen37bd4462011-03-16 22:07:36 -0700408 u16 temp_high;
409 u16 temp_high_orig;
410 u16 temp_high_test;
411 unsigned int result;
412
413 if (!ts->set_reset) {
414 dev_warn(&ts->spi->dev,
415 "unable to selftest: no reset function\n");
416 result = 0;
417 goto out;
418 }
419
420 mutex_lock(&ts->mutex);
421
422 /*
423 * Test TSC2005 communications via temp high register.
424 */
425 tsc2005_disable(ts);
426 result = 1;
427 tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high_orig);
428 temp_high_test = (temp_high_orig - 1) & MAX_12BIT;
429 tsc2005_write(ts, TSC2005_REG_TEMP_HIGH, temp_high_test);
430 tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high);
431 if (temp_high != temp_high_test) {
432 dev_warn(dev, "selftest failed: %d != %d\n",
433 temp_high, temp_high_test);
434 result = 0;
435 }
436
437 /* hardware reset */
438 ts->set_reset(0);
439 usleep_range(100, 500); /* only 10us required */
440 ts->set_reset(1);
441 tsc2005_enable(ts);
442
443 /* test that the reset really happened */
444 tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high);
445 if (temp_high != temp_high_orig) {
446 dev_warn(dev, "selftest failed after reset: %d != %d\n",
447 temp_high, temp_high_orig);
448 result = 0;
449 }
450
451 mutex_unlock(&ts->mutex);
452
453out:
454 return sprintf(buf, "%u\n", result);
455}
456static DEVICE_ATTR(selftest, S_IRUGO, tsc2005_selftest_show, NULL);
457
458static void tsc2005_esd_timer(unsigned long data)
459{
460 struct tsc2005 *ts = (struct tsc2005 *)data;
461
462 schedule_work(&ts->esd_work);
463}
464
465static void tsc2005_esd_work(struct work_struct *work)
466{
467 struct tsc2005 *ts = container_of(work, struct tsc2005, esd_work);
468 u16 r;
469
470 mutex_lock(&ts->mutex);
471
472 if (ts->disable_depth)
473 goto out;
474
475 /*
476 * If we cannot read our known value from configuration register 0 then
477 * reset the controller as if from power-up and start scanning again.
478 */
479 tsc2005_read(ts, TSC2005_REG_CFR0, &r);
480 if ((r ^ TSC2005_CFR0_INITVALUE) & TSC2005_CFR0_RW_MASK) {
481 dev_info(&ts->spi->dev, "TSC2005 not responding - resetting\n");
482 ts->set_reset(0);
483 tsc2005_update_pen_state(ts, 0, 0, 0);
484 usleep_range(100, 500); /* only 10us required */
485 ts->set_reset(1);
486 tsc2005_start_scan(ts);
487 }
488
489 /* re-arm the watchdog */
490 mod_timer(&ts->esd_timer,
491 round_jiffies(jiffies + msecs_to_jiffies(ts->esd_timeout)));
492
493out:
494 mutex_unlock(&ts->mutex);
495}
496
497static void __devinit tsc2005_setup_spi_xfer(struct tsc2005 *ts)
498{
499 tsc2005_setup_read(&ts->spi_x, TSC2005_REG_X, 0);
500 tsc2005_setup_read(&ts->spi_y, TSC2005_REG_Y, 0);
501 tsc2005_setup_read(&ts->spi_z1, TSC2005_REG_Z1, 0);
502 tsc2005_setup_read(&ts->spi_z2, TSC2005_REG_Z2, 1);
503
504 spi_message_init(&ts->spi_read_msg);
505 spi_message_add_tail(&ts->spi_x.spi_xfer, &ts->spi_read_msg);
506 spi_message_add_tail(&ts->spi_y.spi_xfer, &ts->spi_read_msg);
507 spi_message_add_tail(&ts->spi_z1.spi_xfer, &ts->spi_read_msg);
508 spi_message_add_tail(&ts->spi_z2.spi_xfer, &ts->spi_read_msg);
509}
510
511static struct attribute *tsc2005_attrs[] = {
512 &dev_attr_disable.attr,
513 &dev_attr_selftest.attr,
514 NULL
515};
516
517static struct attribute_group tsc2005_attr_group = {
518 .attrs = tsc2005_attrs,
519};
520
521static int __devinit tsc2005_setup(struct tsc2005 *ts,
522 struct tsc2005_platform_data *pdata)
523{
524 int r;
525 int fudge_x;
526 int fudge_y;
527 int fudge_p;
528 int p_max;
529 int x_max;
530 int y_max;
531
532 mutex_init(&ts->mutex);
533
534 tsc2005_setup_spi_xfer(ts);
535
536 init_timer(&ts->penup_timer);
537 setup_timer(&ts->penup_timer, tsc2005_penup_timer, (unsigned long)ts);
538 INIT_WORK(&ts->penup_work, tsc2005_penup_work);
539
540 fudge_x = pdata->ts_x_fudge ? : 4;
541 fudge_y = pdata->ts_y_fudge ? : 8;
542 fudge_p = pdata->ts_pressure_fudge ? : 2;
543 x_max = pdata->ts_x_max ? : MAX_12BIT;
544 y_max = pdata->ts_y_max ? : MAX_12BIT;
545 p_max = pdata->ts_pressure_max ? : MAX_12BIT;
546 ts->x_plate_ohm = pdata->ts_x_plate_ohm ? : 280;
547 ts->esd_timeout = pdata->esd_timeout_ms;
548 ts->set_reset = pdata->set_reset;
549
550 ts->idev = input_allocate_device();
551 if (ts->idev == NULL)
552 return -ENOMEM;
553 ts->idev->name = "TSC2005 touchscreen";
554 snprintf(ts->phys, sizeof(ts->phys), "%s/input-ts",
555 dev_name(&ts->spi->dev));
556 ts->idev->phys = ts->phys;
557 ts->idev->evbit[0] = BIT(EV_ABS) | BIT(EV_KEY);
558 ts->idev->absbit[0] = BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE);
559 ts->idev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
560
561 input_set_abs_params(ts->idev, ABS_X, 0, x_max, fudge_x, 0);
562 input_set_abs_params(ts->idev, ABS_Y, 0, y_max, fudge_y, 0);
563 input_set_abs_params(ts->idev, ABS_PRESSURE, 0, p_max, fudge_p, 0);
564
565 r = request_threaded_irq(ts->spi->irq, tsc2005_irq_handler,
566 tsc2005_irq_thread, IRQF_TRIGGER_RISING,
567 "tsc2005", ts);
568 if (r) {
569 dev_err(&ts->spi->dev, "request_threaded_irq(): %d\n", r);
570 goto err1;
571 }
572 set_irq_wake(ts->spi->irq, 1);
573
574 r = input_register_device(ts->idev);
575 if (r) {
576 dev_err(&ts->spi->dev, "input_register_device(): %d\n", r);
577 goto err2;
578 }
579
580 r = sysfs_create_group(&ts->spi->dev.kobj, &tsc2005_attr_group);
581 if (r)
582 dev_warn(&ts->spi->dev, "sysfs entry creation failed: %d\n", r);
583
584 tsc2005_start_scan(ts);
585
586 if (!ts->esd_timeout || !ts->set_reset)
587 goto done;
588
589 /* start the optional ESD watchdog */
590 setup_timer(&ts->esd_timer, tsc2005_esd_timer, (unsigned long)ts);
591 INIT_WORK(&ts->esd_work, tsc2005_esd_work);
592 mod_timer(&ts->esd_timer,
593 round_jiffies(jiffies + msecs_to_jiffies(ts->esd_timeout)));
594
595done:
596 return 0;
597
598err2:
599 free_irq(ts->spi->irq, ts);
600
601err1:
602 input_free_device(ts->idev);
603 return r;
604}
605
606static int __devinit tsc2005_probe(struct spi_device *spi)
607{
608 struct tsc2005_platform_data *pdata = spi->dev.platform_data;
609 struct tsc2005 *ts;
610 int r;
611
612 if (spi->irq < 0) {
613 dev_dbg(&spi->dev, "no irq\n");
614 return -ENODEV;
615 }
616
617 if (!pdata) {
618 dev_dbg(&spi->dev, "no platform data\n");
619 return -ENODEV;
620 }
621
622 ts = kzalloc(sizeof(*ts), GFP_KERNEL);
623 if (ts == NULL)
624 return -ENOMEM;
625
Dmitry Torokhov6b007d62011-03-16 22:08:08 -0700626 spi_set_drvdata(spi, ts);
Lauri Leukkunen37bd4462011-03-16 22:07:36 -0700627 ts->spi = spi;
628 spi->dev.power.power_state = PMSG_ON;
629 spi->mode = SPI_MODE_0;
630 spi->bits_per_word = 8;
631 if (!spi->max_speed_hz)
632 spi->max_speed_hz = TSC2005_SPI_MAX_SPEED_HZ;
633 spi_setup(spi);
634
635 r = tsc2005_setup(ts, pdata);
636 if (r)
637 kfree(ts);
638 return r;
639}
640
641static int __devexit tsc2005_remove(struct spi_device *spi)
642{
Dmitry Torokhov6b007d62011-03-16 22:08:08 -0700643 struct tsc2005 *ts = spi_get_drvdata(spi);
Lauri Leukkunen37bd4462011-03-16 22:07:36 -0700644
645 mutex_lock(&ts->mutex);
646 tsc2005_disable(ts);
647 mutex_unlock(&ts->mutex);
648
649 if (ts->esd_timeout)
650 del_timer_sync(&ts->esd_timer);
651 del_timer_sync(&ts->penup_timer);
652
653 flush_work(&ts->esd_work);
654 flush_work(&ts->penup_work);
655
656 sysfs_remove_group(&ts->spi->dev.kobj, &tsc2005_attr_group);
657 free_irq(ts->spi->irq, ts);
658 input_unregister_device(ts->idev);
659 kfree(ts);
660
661 return 0;
662}
663
664#ifdef CONFIG_PM
665static int tsc2005_suspend(struct spi_device *spi, pm_message_t mesg)
666{
Dmitry Torokhov6b007d62011-03-16 22:08:08 -0700667 struct spi_device *spi = to_spi_device(dev);
668 struct tsc2005 *ts = spi_get_drvdata(spi);
Lauri Leukkunen37bd4462011-03-16 22:07:36 -0700669
670 mutex_lock(&ts->mutex);
671 tsc2005_disable(ts);
672 mutex_unlock(&ts->mutex);
673
674 return 0;
675}
676
677static int tsc2005_resume(struct spi_device *spi)
678{
Dmitry Torokhov6b007d62011-03-16 22:08:08 -0700679 struct spi_device *spi = to_spi_device(dev);
680 struct tsc2005 *ts = spi_get_drvdata(spi);
Lauri Leukkunen37bd4462011-03-16 22:07:36 -0700681
682 mutex_lock(&ts->mutex);
683 tsc2005_enable(ts);
684 mutex_unlock(&ts->mutex);
685
686 return 0;
687}
688#endif
689
690static struct spi_driver tsc2005_driver = {
691 .driver = {
692 .name = "tsc2005",
693 .owner = THIS_MODULE,
694 },
695#ifdef CONFIG_PM
696 .suspend = tsc2005_suspend,
697 .resume = tsc2005_resume,
698#endif
699 .probe = tsc2005_probe,
700 .remove = __devexit_p(tsc2005_remove),
701};
702
703static int __init tsc2005_init(void)
704{
705 printk(KERN_INFO "TSC2005 driver initializing\n");
706 return spi_register_driver(&tsc2005_driver);
707}
708module_init(tsc2005_init);
709
710static void __exit tsc2005_exit(void)
711{
712 spi_unregister_driver(&tsc2005_driver);
713}
714module_exit(tsc2005_exit);
715
716MODULE_AUTHOR("Lauri Leukkunen <lauri.leukkunen@nokia.com>");
717MODULE_LICENSE("GPL");
718MODULE_ALIAS("platform:tsc2005");