2 * Copyright (C) 2012 Simon Budig, <simon.budig@kernelconcepts.de>
3 * Daniel Wagener <daniel.wagener@kernelconcepts.de> (M09 firmware support)
4 * Lothar Waßmann <LW@KARO-electronics.de> (DT support)
6 * This software is licensed under the terms of the GNU General Public
7 * License version 2, as published by the Free Software Foundation, and
8 * may be copied, distributed, and modified under those terms.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 * This is a driver for the EDT "Polytouch" family of touch controllers
22 * based on the FocalTech FT5x06 line of chips.
24 * Development of this driver has been sponsored by Glyn:
25 * http://www.glyn.com/Products/Displays
28 #include <linux/module.h>
29 #include <linux/ratelimit.h>
30 #include <linux/interrupt.h>
31 #include <linux/input.h>
32 #include <linux/i2c.h>
33 #include <linux/uaccess.h>
34 #include <linux/delay.h>
35 #include <linux/debugfs.h>
36 #include <linux/slab.h>
37 #include <linux/gpio.h>
38 #include <linux/of_gpio.h>
39 #include <linux/input/mt.h>
40 #include <linux/input/edt-ft5x06.h>
42 #define MAX_SUPPORT_POINTS 5
44 #define WORK_REGISTER_THRESHOLD 0x00
45 #define WORK_REGISTER_REPORT_RATE 0x08
46 #define WORK_REGISTER_GAIN 0x30
47 #define WORK_REGISTER_OFFSET 0x31
48 #define WORK_REGISTER_NUM_X 0x33
49 #define WORK_REGISTER_NUM_Y 0x34
51 #define M09_REGISTER_THRESHOLD 0x80
52 #define M09_REGISTER_GAIN 0x92
53 #define M09_REGISTER_OFFSET 0x93
54 #define M09_REGISTER_NUM_X 0x94
55 #define M09_REGISTER_NUM_Y 0x95
57 #define NO_REGISTER 0xff
59 #define WORK_REGISTER_OPMODE 0x3c
60 #define FACTORY_REGISTER_OPMODE 0x01
62 #define TOUCH_EVENT_DOWN 0x00
63 #define TOUCH_EVENT_UP 0x01
64 #define TOUCH_EVENT_ON 0x02
65 #define TOUCH_EVENT_RESERVED 0x03
67 #define EDT_NAME_LEN 23
68 #define EDT_SWITCH_MODE_RETRIES 10
69 #define EDT_SWITCH_MODE_DELAY 5 /* msec */
70 #define EDT_RAW_DATA_RETRIES 100
71 #define EDT_RAW_DATA_DELAY 1 /* msec */
87 struct edt_ft5x06_ts_data {
88 struct i2c_client *client;
89 struct input_dev *input;
97 #if defined(CONFIG_DEBUG_FS)
98 struct dentry *debug_dir;
110 char name[EDT_NAME_LEN];
112 struct edt_reg_addr reg_addr;
113 enum edt_ver version;
116 static int edt_ft5x06_ts_readwrite(struct i2c_client *client,
117 u16 wr_len, u8 *wr_buf,
118 u16 rd_len, u8 *rd_buf)
120 struct i2c_msg wrmsg[2];
125 wrmsg[i].addr = client->addr;
127 wrmsg[i].len = wr_len;
128 wrmsg[i].buf = wr_buf;
132 wrmsg[i].addr = client->addr;
133 wrmsg[i].flags = I2C_M_RD;
134 wrmsg[i].len = rd_len;
135 wrmsg[i].buf = rd_buf;
139 ret = i2c_transfer(client->adapter, wrmsg, i);
148 static bool edt_ft5x06_ts_check_crc(struct edt_ft5x06_ts_data *tsdata,
154 for (i = 0; i < buflen - 1; i++)
157 if (crc != buf[buflen-1]) {
158 dev_err_ratelimited(&tsdata->client->dev,
159 "crc error: 0x%02x expected, got 0x%02x\n",
167 static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
169 struct edt_ft5x06_ts_data *tsdata = dev_id;
170 struct device *dev = &tsdata->client->dev;
173 int i, type, x, y, id;
174 int offset, tplen, datalen;
177 switch (tsdata->version) {
179 cmd = 0xf9; /* tell the controller to send touch data */
180 offset = 5; /* where the actual touch data starts */
181 tplen = 4; /* data comes in so called frames */
182 datalen = 26; /* how much bytes to listen for */
196 memset(rdbuf, 0, sizeof(rdbuf));
198 error = edt_ft5x06_ts_readwrite(tsdata->client,
202 dev_err_ratelimited(dev, "Unable to fetch data, error: %d\n",
207 /* M09 does not send header or CRC */
208 if (tsdata->version == M06) {
209 if (rdbuf[0] != 0xaa || rdbuf[1] != 0xaa ||
210 rdbuf[2] != datalen) {
211 dev_err_ratelimited(dev,
212 "Unexpected header: %02x%02x%02x!\n",
213 rdbuf[0], rdbuf[1], rdbuf[2]);
217 if (!edt_ft5x06_ts_check_crc(tsdata, rdbuf, datalen))
221 for (i = 0; i < MAX_SUPPORT_POINTS; i++) {
222 u8 *buf = &rdbuf[i * tplen + offset];
226 /* ignore Reserved events */
227 if (type == TOUCH_EVENT_RESERVED)
230 /* M06 sometimes sends bogus coordinates in TOUCH_DOWN */
231 if (tsdata->version == M06 && type == TOUCH_EVENT_DOWN)
234 x = ((buf[0] << 8) | buf[1]) & 0x0fff;
235 y = ((buf[2] << 8) | buf[3]) & 0x0fff;
236 id = (buf[2] >> 4) & 0x0f;
237 down = (type != TOUCH_EVENT_UP);
239 input_mt_slot(tsdata->input, id);
240 input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER, down);
245 input_report_abs(tsdata->input, ABS_MT_POSITION_X, x);
246 input_report_abs(tsdata->input, ABS_MT_POSITION_Y, y);
249 input_mt_report_pointer_emulation(tsdata->input, true);
250 input_sync(tsdata->input);
256 static int edt_ft5x06_register_write(struct edt_ft5x06_ts_data *tsdata,
261 switch (tsdata->version) {
263 wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc;
264 wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
265 wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
267 wrbuf[3] = wrbuf[0] ^ wrbuf[1] ^ wrbuf[2];
268 return edt_ft5x06_ts_readwrite(tsdata->client, 4,
274 return edt_ft5x06_ts_readwrite(tsdata->client, 3,
282 static int edt_ft5x06_register_read(struct edt_ft5x06_ts_data *tsdata,
285 u8 wrbuf[2], rdbuf[2];
288 switch (tsdata->version) {
290 wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc;
291 wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
292 wrbuf[1] |= tsdata->factory_mode ? 0x80 : 0x40;
294 error = edt_ft5x06_ts_readwrite(tsdata->client, 2, wrbuf, 2,
299 if ((wrbuf[0] ^ wrbuf[1] ^ rdbuf[0]) != rdbuf[1]) {
300 dev_err(&tsdata->client->dev,
301 "crc error: 0x%02x expected, got 0x%02x\n",
302 wrbuf[0] ^ wrbuf[1] ^ rdbuf[0],
310 error = edt_ft5x06_ts_readwrite(tsdata->client, 1,
323 struct edt_ft5x06_attribute {
324 struct device_attribute dattr;
332 #define EDT_ATTR(_field, _mode, _addr_m06, _addr_m09, \
333 _limit_low, _limit_high) \
334 struct edt_ft5x06_attribute edt_ft5x06_attr_##_field = { \
335 .dattr = __ATTR(_field, _mode, \
336 edt_ft5x06_setting_show, \
337 edt_ft5x06_setting_store), \
338 .field_offset = offsetof(struct edt_ft5x06_ts_data, _field), \
339 .addr_m06 = _addr_m06, \
340 .addr_m09 = _addr_m09, \
341 .limit_low = _limit_low, \
342 .limit_high = _limit_high, \
345 static ssize_t edt_ft5x06_setting_show(struct device *dev,
346 struct device_attribute *dattr,
349 struct i2c_client *client = to_i2c_client(dev);
350 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
351 struct edt_ft5x06_attribute *attr =
352 container_of(dattr, struct edt_ft5x06_attribute, dattr);
353 u8 *field = (u8 *)((char *)tsdata + attr->field_offset);
359 mutex_lock(&tsdata->mutex);
361 if (tsdata->factory_mode) {
366 switch (tsdata->version) {
368 addr = attr->addr_m06;
372 addr = attr->addr_m09;
380 if (addr != NO_REGISTER) {
381 val = edt_ft5x06_register_read(tsdata, addr);
384 dev_err(&tsdata->client->dev,
385 "Failed to fetch attribute %s, error %d\n",
386 dattr->attr.name, error);
394 dev_warn(&tsdata->client->dev,
395 "%s: read (%d) and stored value (%d) differ\n",
396 dattr->attr.name, val, *field);
400 count = scnprintf(buf, PAGE_SIZE, "%d\n", val);
402 mutex_unlock(&tsdata->mutex);
403 return error ?: count;
406 static ssize_t edt_ft5x06_setting_store(struct device *dev,
407 struct device_attribute *dattr,
408 const char *buf, size_t count)
410 struct i2c_client *client = to_i2c_client(dev);
411 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
412 struct edt_ft5x06_attribute *attr =
413 container_of(dattr, struct edt_ft5x06_attribute, dattr);
414 u8 *field = (u8 *)((char *)tsdata + attr->field_offset);
419 mutex_lock(&tsdata->mutex);
421 if (tsdata->factory_mode) {
426 error = kstrtouint(buf, 0, &val);
430 if (val < attr->limit_low || val > attr->limit_high) {
435 switch (tsdata->version) {
437 addr = attr->addr_m06;
441 addr = attr->addr_m09;
449 if (addr != NO_REGISTER) {
450 error = edt_ft5x06_register_write(tsdata, addr, val);
452 dev_err(&tsdata->client->dev,
453 "Failed to update attribute %s, error: %d\n",
454 dattr->attr.name, error);
461 mutex_unlock(&tsdata->mutex);
462 return error ?: count;
465 static EDT_ATTR(gain, S_IWUSR | S_IRUGO, WORK_REGISTER_GAIN,
466 M09_REGISTER_GAIN, 0, 31);
467 static EDT_ATTR(offset, S_IWUSR | S_IRUGO, WORK_REGISTER_OFFSET,
468 M09_REGISTER_OFFSET, 0, 31);
469 static EDT_ATTR(threshold, S_IWUSR | S_IRUGO, WORK_REGISTER_THRESHOLD,
470 M09_REGISTER_THRESHOLD, 20, 80);
471 static EDT_ATTR(report_rate, S_IWUSR | S_IRUGO, WORK_REGISTER_REPORT_RATE,
474 static struct attribute *edt_ft5x06_attrs[] = {
475 &edt_ft5x06_attr_gain.dattr.attr,
476 &edt_ft5x06_attr_offset.dattr.attr,
477 &edt_ft5x06_attr_threshold.dattr.attr,
478 &edt_ft5x06_attr_report_rate.dattr.attr,
482 static const struct attribute_group edt_ft5x06_attr_group = {
483 .attrs = edt_ft5x06_attrs,
486 #ifdef CONFIG_DEBUG_FS
487 static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata)
489 struct i2c_client *client = tsdata->client;
490 int retries = EDT_SWITCH_MODE_RETRIES;
494 disable_irq(client->irq);
496 if (!tsdata->raw_buffer) {
497 tsdata->raw_bufsize = tsdata->num_x * tsdata->num_y *
499 tsdata->raw_buffer = kzalloc(tsdata->raw_bufsize, GFP_KERNEL);
500 if (!tsdata->raw_buffer) {
506 /* mode register is 0x3c when in the work mode */
507 if (tsdata->version == M09)
510 error = edt_ft5x06_register_write(tsdata, WORK_REGISTER_OPMODE, 0x03);
512 dev_err(&client->dev,
513 "failed to switch to factory mode, error %d\n", error);
517 tsdata->factory_mode = true;
519 mdelay(EDT_SWITCH_MODE_DELAY);
520 /* mode register is 0x01 when in factory mode */
521 ret = edt_ft5x06_register_read(tsdata, FACTORY_REGISTER_OPMODE);
524 } while (--retries > 0);
527 dev_err(&client->dev, "not in factory mode after %dms.\n",
528 EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY);
536 kfree(tsdata->raw_buffer);
537 tsdata->raw_buffer = NULL;
538 tsdata->factory_mode = false;
539 enable_irq(client->irq);
544 dev_err(&client->dev, "No factory mode support for M09\n");
549 static int edt_ft5x06_work_mode(struct edt_ft5x06_ts_data *tsdata)
551 struct i2c_client *client = tsdata->client;
552 int retries = EDT_SWITCH_MODE_RETRIES;
553 struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
557 /* mode register is 0x01 when in the factory mode */
558 error = edt_ft5x06_register_write(tsdata, FACTORY_REGISTER_OPMODE, 0x1);
560 dev_err(&client->dev,
561 "failed to switch to work mode, error: %d\n", error);
565 tsdata->factory_mode = false;
568 mdelay(EDT_SWITCH_MODE_DELAY);
569 /* mode register is 0x01 when in factory mode */
570 ret = edt_ft5x06_register_read(tsdata, WORK_REGISTER_OPMODE);
573 } while (--retries > 0);
576 dev_err(&client->dev, "not in work mode after %dms.\n",
577 EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY);
578 tsdata->factory_mode = true;
582 kfree(tsdata->raw_buffer);
583 tsdata->raw_buffer = NULL;
585 /* restore parameters */
586 edt_ft5x06_register_write(tsdata, reg_addr->reg_threshold,
588 edt_ft5x06_register_write(tsdata, reg_addr->reg_gain,
590 edt_ft5x06_register_write(tsdata, reg_addr->reg_offset,
592 if (reg_addr->reg_report_rate)
593 edt_ft5x06_register_write(tsdata, reg_addr->reg_report_rate,
594 tsdata->report_rate);
596 enable_irq(client->irq);
601 static int edt_ft5x06_debugfs_mode_get(void *data, u64 *mode)
603 struct edt_ft5x06_ts_data *tsdata = data;
605 *mode = tsdata->factory_mode;
610 static int edt_ft5x06_debugfs_mode_set(void *data, u64 mode)
612 struct edt_ft5x06_ts_data *tsdata = data;
618 mutex_lock(&tsdata->mutex);
620 if (mode != tsdata->factory_mode) {
621 retval = mode ? edt_ft5x06_factory_mode(tsdata) :
622 edt_ft5x06_work_mode(tsdata);
625 mutex_unlock(&tsdata->mutex);
630 DEFINE_SIMPLE_ATTRIBUTE(debugfs_mode_fops, edt_ft5x06_debugfs_mode_get,
631 edt_ft5x06_debugfs_mode_set, "%llu\n");
633 static ssize_t edt_ft5x06_debugfs_raw_data_read(struct file *file,
634 char __user *buf, size_t count, loff_t *off)
636 struct edt_ft5x06_ts_data *tsdata = file->private_data;
637 struct i2c_client *client = tsdata->client;
638 int retries = EDT_RAW_DATA_RETRIES;
645 if (*off < 0 || *off >= tsdata->raw_bufsize)
648 mutex_lock(&tsdata->mutex);
650 if (!tsdata->factory_mode || !tsdata->raw_buffer) {
655 error = edt_ft5x06_register_write(tsdata, 0x08, 0x01);
657 dev_dbg(&client->dev,
658 "failed to write 0x08 register, error %d\n", error);
663 msleep(EDT_RAW_DATA_DELAY);
664 val = edt_ft5x06_register_read(tsdata, 0x08);
667 } while (--retries > 0);
671 dev_dbg(&client->dev,
672 "failed to read 0x08 register, error %d\n", error);
677 dev_dbg(&client->dev,
678 "timed out waiting for register to settle\n");
683 rdbuf = tsdata->raw_buffer;
684 colbytes = tsdata->num_y * sizeof(u16);
688 for (i = 0; i < tsdata->num_x; i++) {
689 wrbuf[2] = i; /* column index */
690 error = edt_ft5x06_ts_readwrite(tsdata->client,
691 sizeof(wrbuf), wrbuf,
699 read = min_t(size_t, count, tsdata->raw_bufsize - *off);
700 if (copy_to_user(buf, tsdata->raw_buffer + *off, read)) {
707 mutex_unlock(&tsdata->mutex);
708 return error ?: read;
712 static const struct file_operations debugfs_raw_data_fops = {
714 .read = edt_ft5x06_debugfs_raw_data_read,
718 edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
719 const char *debugfs_name)
721 tsdata->debug_dir = debugfs_create_dir(debugfs_name, NULL);
722 if (!tsdata->debug_dir)
725 debugfs_create_u16("num_x", S_IRUSR, tsdata->debug_dir, &tsdata->num_x);
726 debugfs_create_u16("num_y", S_IRUSR, tsdata->debug_dir, &tsdata->num_y);
728 debugfs_create_file("mode", S_IRUSR | S_IWUSR,
729 tsdata->debug_dir, tsdata, &debugfs_mode_fops);
730 debugfs_create_file("raw_data", S_IRUSR,
731 tsdata->debug_dir, tsdata, &debugfs_raw_data_fops);
735 edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
737 if (tsdata->debug_dir)
738 debugfs_remove_recursive(tsdata->debug_dir);
739 kfree(tsdata->raw_buffer);
745 edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
746 const char *debugfs_name)
751 edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
755 #endif /* CONFIG_DEBUGFS */
759 static int edt_ft5x06_ts_reset(struct i2c_client *client,
760 struct edt_ft5x06_ts_data *tsdata)
764 if (gpio_is_valid(tsdata->wake_pin)) {
765 error = gpio_request_one(tsdata->wake_pin, GPIOF_OUT_INIT_LOW,
768 dev_err(&client->dev,
769 "Failed to request GPIO %d as wake pin, error %d\n",
770 tsdata->wake_pin, error);
775 gpio_set_value(tsdata->wake_pin, 1);
777 if (gpio_is_valid(tsdata->reset_pin)) {
778 /* this pulls reset down, enabling the low active reset */
779 error = gpio_request_one(tsdata->reset_pin, GPIOF_OUT_INIT_LOW,
782 dev_err(&client->dev,
783 "Failed to request GPIO %d as reset pin, error %d\n",
784 tsdata->reset_pin, error);
789 gpio_set_value(tsdata->reset_pin, 1);
796 static int edt_ft5x06_ts_identify(struct i2c_client *client,
797 struct edt_ft5x06_ts_data *tsdata,
800 u8 rdbuf[EDT_NAME_LEN];
803 char *model_name = tsdata->name;
805 /* see what we find if we assume it is a M06 *
806 * if we get less than EDT_NAME_LEN, we don't want
807 * to have garbage in there
809 memset(rdbuf, 0, sizeof(rdbuf));
810 error = edt_ft5x06_ts_readwrite(client, 1, "\xbb",
811 EDT_NAME_LEN - 1, rdbuf);
815 /* if we find something consistent, stay with that assumption
816 * at least M09 won't send 3 bytes here
818 if (!(strnicmp(rdbuf + 1, "EP0", 3))) {
819 tsdata->version = M06;
821 /* remove last '$' end marker */
822 rdbuf[EDT_NAME_LEN - 1] = '\0';
823 if (rdbuf[EDT_NAME_LEN - 2] == '$')
824 rdbuf[EDT_NAME_LEN - 2] = '\0';
826 /* look for Model/Version separator */
827 p = strchr(rdbuf, '*');
830 strlcpy(model_name, rdbuf + 1, EDT_NAME_LEN);
831 strlcpy(fw_version, p ? p : "", EDT_NAME_LEN);
833 /* since there are only two versions around (M06, M09) */
834 tsdata->version = M09;
836 error = edt_ft5x06_ts_readwrite(client, 1, "\xA6",
841 strlcpy(fw_version, rdbuf, 2);
843 error = edt_ft5x06_ts_readwrite(client, 1, "\xA8",
848 snprintf(model_name, EDT_NAME_LEN, "EP0%i%i0M09",
849 rdbuf[0] >> 4, rdbuf[0] & 0x0F);
855 #define EDT_ATTR_CHECKSET(name, reg) \
856 if (pdata->name >= edt_ft5x06_attr_##name.limit_low && \
857 pdata->name <= edt_ft5x06_attr_##name.limit_high) \
858 edt_ft5x06_register_write(tsdata, reg, pdata->name)
860 #define EDT_GET_PROP(name, reg) { \
861 const u32 *prop = of_get_property(np, #name, NULL); \
863 edt_ft5x06_register_write(tsdata, reg, be32_to_cpu(*prop)); \
866 static void edt_ft5x06_ts_get_dt_defaults(struct device_node *np,
867 struct edt_ft5x06_ts_data *tsdata)
869 struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
871 EDT_GET_PROP(threshold, reg_addr->reg_threshold);
872 EDT_GET_PROP(gain, reg_addr->reg_gain);
873 EDT_GET_PROP(offset, reg_addr->reg_offset);
877 edt_ft5x06_ts_get_defaults(struct edt_ft5x06_ts_data *tsdata,
878 const struct edt_ft5x06_platform_data *pdata)
880 struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
882 if (!pdata->use_parameters)
885 /* pick up defaults from the platform data */
886 EDT_ATTR_CHECKSET(threshold, reg_addr->reg_threshold);
887 EDT_ATTR_CHECKSET(gain, reg_addr->reg_gain);
888 EDT_ATTR_CHECKSET(offset, reg_addr->reg_offset);
889 if (reg_addr->reg_report_rate != NO_REGISTER)
890 EDT_ATTR_CHECKSET(report_rate, reg_addr->reg_report_rate);
894 edt_ft5x06_ts_get_parameters(struct edt_ft5x06_ts_data *tsdata)
896 struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
898 tsdata->threshold = edt_ft5x06_register_read(tsdata,
899 reg_addr->reg_threshold);
900 tsdata->gain = edt_ft5x06_register_read(tsdata, reg_addr->reg_gain);
901 tsdata->offset = edt_ft5x06_register_read(tsdata, reg_addr->reg_offset);
902 if (reg_addr->reg_report_rate != NO_REGISTER)
903 tsdata->report_rate = edt_ft5x06_register_read(tsdata,
904 reg_addr->reg_report_rate);
905 tsdata->num_x = edt_ft5x06_register_read(tsdata, reg_addr->reg_num_x);
906 tsdata->num_y = edt_ft5x06_register_read(tsdata, reg_addr->reg_num_y);
910 edt_ft5x06_ts_set_regs(struct edt_ft5x06_ts_data *tsdata)
912 struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
914 switch (tsdata->version) {
916 reg_addr->reg_threshold = WORK_REGISTER_THRESHOLD;
917 reg_addr->reg_report_rate = WORK_REGISTER_REPORT_RATE;
918 reg_addr->reg_gain = WORK_REGISTER_GAIN;
919 reg_addr->reg_offset = WORK_REGISTER_OFFSET;
920 reg_addr->reg_num_x = WORK_REGISTER_NUM_X;
921 reg_addr->reg_num_y = WORK_REGISTER_NUM_Y;
925 reg_addr->reg_threshold = M09_REGISTER_THRESHOLD;
926 reg_addr->reg_gain = M09_REGISTER_GAIN;
927 reg_addr->reg_offset = M09_REGISTER_OFFSET;
928 reg_addr->reg_num_x = M09_REGISTER_NUM_X;
929 reg_addr->reg_num_y = M09_REGISTER_NUM_Y;
935 static int edt_ft5x06_i2c_ts_probe_dt(struct device *dev,
936 struct edt_ft5x06_ts_data *tsdata)
939 struct device_node *np = dev->of_node;
940 enum of_gpio_flags gpio_flags;
946 * irq_pin is not needed for DT setup.
947 * irq is associated via 'interrupts' property in DT
949 tsdata->irq_pin = -EINVAL;
951 ret = of_get_named_gpio_flags(np, "reset-gpios", 0, &gpio_flags);
952 tsdata->reset_pin = ret;
954 ret = of_get_named_gpio_flags(np, "wake-gpios", 0, &gpio_flags);
955 tsdata->wake_pin = ret;
960 static inline int edt_ft5x06_i2c_ts_probe_dt(struct device *dev,
961 struct edt_ft5x06_i2c_ts_data *tsdata)
967 static int edt_ft5x06_ts_probe(struct i2c_client *client,
968 const struct i2c_device_id *id)
970 const struct edt_ft5x06_platform_data *pdata =
971 client->dev.platform_data;
972 struct edt_ft5x06_ts_data *tsdata;
973 struct input_dev *input;
975 char fw_version[EDT_NAME_LEN];
977 dev_dbg(&client->dev, "probing for EDT FT5x06 I2C\n");
979 tsdata = devm_kzalloc(&client->dev, sizeof(*tsdata), GFP_KERNEL);
981 dev_err(&client->dev, "failed to allocate driver data.\n");
986 error = edt_ft5x06_i2c_ts_probe_dt(&client->dev, tsdata);
988 dev_err(&client->dev,
989 "DT probe failed and no platform data present\n");
993 tsdata->reset_pin = pdata->reset_pin;
994 tsdata->irq_pin = pdata->irq_pin;
995 tsdata->wake_pin = -EINVAL;
998 error = edt_ft5x06_ts_reset(client, tsdata);
1002 if (gpio_is_valid(tsdata->irq_pin)) {
1003 error = gpio_request_one(tsdata->irq_pin,
1004 GPIOF_IN, "edt-ft5x06 irq");
1006 dev_err(&client->dev,
1007 "Failed to request GPIO %d, error %d\n",
1008 tsdata->irq_pin, error);
1013 input = input_allocate_device();
1015 dev_err(&client->dev, "failed to allocate input device.\n");
1020 mutex_init(&tsdata->mutex);
1021 tsdata->client = client;
1022 tsdata->input = input;
1023 tsdata->factory_mode = false;
1025 error = edt_ft5x06_ts_identify(client, tsdata, fw_version);
1027 dev_err(&client->dev, "touchscreen probe failed\n");
1031 edt_ft5x06_ts_set_regs(tsdata);
1034 edt_ft5x06_ts_get_dt_defaults(client->dev.of_node, tsdata);
1036 edt_ft5x06_ts_get_defaults(tsdata, pdata);
1038 edt_ft5x06_ts_get_parameters(tsdata);
1040 dev_dbg(&client->dev,
1041 "Model \"%s\", Rev. \"%s\", %dx%d sensors\n",
1042 tsdata->name, fw_version, tsdata->num_x, tsdata->num_y);
1044 input->name = tsdata->name;
1045 input->id.bustype = BUS_I2C;
1046 input->dev.parent = &client->dev;
1048 __set_bit(EV_SYN, input->evbit);
1049 __set_bit(EV_KEY, input->evbit);
1050 __set_bit(EV_ABS, input->evbit);
1051 __set_bit(BTN_TOUCH, input->keybit);
1052 input_set_abs_params(input, ABS_X, 0, tsdata->num_x * 64 - 1, 0, 0);
1053 input_set_abs_params(input, ABS_Y, 0, tsdata->num_y * 64 - 1, 0, 0);
1054 input_set_abs_params(input, ABS_MT_POSITION_X,
1055 0, tsdata->num_x * 64 - 1, 0, 0);
1056 input_set_abs_params(input, ABS_MT_POSITION_Y,
1057 0, tsdata->num_y * 64 - 1, 0, 0);
1058 error = input_mt_init_slots(input, MAX_SUPPORT_POINTS, 0);
1060 dev_err(&client->dev, "Unable to init MT slots.\n");
1064 input_set_drvdata(input, tsdata);
1065 i2c_set_clientdata(client, tsdata);
1067 error = request_threaded_irq(client->irq, NULL, edt_ft5x06_ts_isr,
1068 IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
1069 client->name, tsdata);
1071 dev_err(&client->dev, "Unable to request touchscreen IRQ.\n");
1075 error = sysfs_create_group(&client->dev.kobj, &edt_ft5x06_attr_group);
1079 error = input_register_device(input);
1081 goto err_remove_attrs;
1083 edt_ft5x06_ts_prepare_debugfs(tsdata, dev_driver_string(&client->dev));
1084 device_init_wakeup(&client->dev, 1);
1086 dev_dbg(&client->dev,
1087 "EDT FT5x06 initialized: IRQ %d, WAKE pin %d, Reset pin %d.\n",
1088 client->irq, tsdata->wake_pin, tsdata->reset_pin);
1093 sysfs_remove_group(&client->dev.kobj, &edt_ft5x06_attr_group);
1095 free_irq(client->irq, tsdata);
1097 input_free_device(input);
1098 if (gpio_is_valid(tsdata->irq_pin))
1099 gpio_free(tsdata->irq_pin);
1100 if (gpio_is_valid(tsdata->reset_pin))
1101 gpio_free(tsdata->reset_pin);
1102 if (gpio_is_valid(tsdata->wake_pin))
1103 gpio_free(tsdata->wake_pin);
1108 static int edt_ft5x06_ts_remove(struct i2c_client *client)
1110 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
1112 edt_ft5x06_ts_teardown_debugfs(tsdata);
1113 sysfs_remove_group(&client->dev.kobj, &edt_ft5x06_attr_group);
1115 free_irq(client->irq, tsdata);
1116 input_unregister_device(tsdata->input);
1118 if (gpio_is_valid(tsdata->irq_pin))
1119 gpio_free(tsdata->irq_pin);
1120 if (gpio_is_valid(tsdata->reset_pin))
1121 gpio_free(tsdata->reset_pin);
1122 if (gpio_is_valid(tsdata->wake_pin))
1123 gpio_free(tsdata->wake_pin);
1128 #ifdef CONFIG_PM_SLEEP
1129 static int edt_ft5x06_ts_suspend(struct device *dev)
1131 struct i2c_client *client = to_i2c_client(dev);
1133 if (device_may_wakeup(dev))
1134 enable_irq_wake(client->irq);
1139 static int edt_ft5x06_ts_resume(struct device *dev)
1141 struct i2c_client *client = to_i2c_client(dev);
1143 if (device_may_wakeup(dev))
1144 disable_irq_wake(client->irq);
1150 static SIMPLE_DEV_PM_OPS(edt_ft5x06_ts_pm_ops,
1151 edt_ft5x06_ts_suspend, edt_ft5x06_ts_resume);
1153 static const struct i2c_device_id edt_ft5x06_ts_id[] = {
1154 { "edt-ft5x06", 0, },
1157 MODULE_DEVICE_TABLE(i2c, edt_ft5x06_ts_id);
1159 static const struct of_device_id edt_ft5x06_of_match[] = {
1160 { .compatible = "edt,edt-ft5x06", },
1163 MODULE_DEVICE_TABLE(of, edt_ft5x06_of_match);
1165 static struct i2c_driver edt_ft5x06_ts_driver = {
1167 .owner = THIS_MODULE,
1168 .name = "edt_ft5x06",
1169 .of_match_table = edt_ft5x06_of_match,
1170 .pm = &edt_ft5x06_ts_pm_ops,
1172 .id_table = edt_ft5x06_ts_id,
1173 .probe = edt_ft5x06_ts_probe,
1174 .remove = edt_ft5x06_ts_remove,
1177 module_i2c_driver(edt_ft5x06_ts_driver);
1179 MODULE_AUTHOR("Simon Budig <simon.budig@kernelconcepts.de>");
1180 MODULE_DESCRIPTION("EDT FT5x06 I2C Touchscreen Driver");
1181 MODULE_LICENSE("GPL");
1182 MODULE_ALIAS("platform:edt-ft5x06");