2 * Atmel maXTouch Touchscreen driver
4 * Copyright (C) 2010 Samsung Electronics Co.Ltd
5 * Author: Joonyoung Shim <jy0922.shim@samsung.com>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <linux/delay.h>
17 #include <linux/firmware.h>
18 #include <linux/i2c.h>
19 #include <linux/i2c/atmel_mxt_ts.h>
20 #include <linux/input/mt.h>
21 #include <linux/interrupt.h>
22 #include <linux/slab.h>
30 #define MXT_APP_LOW 0x4a
31 #define MXT_APP_HIGH 0x4b
32 #define MXT_BOOT_LOW 0x24
33 #define MXT_BOOT_HIGH 0x25
36 #define MXT_FW_NAME "maxtouch.fw"
39 #define MXT_FAMILY_ID 0x00
40 #define MXT_VARIANT_ID 0x01
41 #define MXT_VERSION 0x02
42 #define MXT_BUILD 0x03
43 #define MXT_MATRIX_X_SIZE 0x04
44 #define MXT_MATRIX_Y_SIZE 0x05
45 #define MXT_OBJECT_NUM 0x06
46 #define MXT_OBJECT_START 0x07
48 #define MXT_OBJECT_SIZE 6
51 #define MXT_DEBUG_DIAGNOSTIC_T37 37
52 #define MXT_GEN_MESSAGE_T5 5
53 #define MXT_GEN_COMMAND_T6 6
54 #define MXT_GEN_POWER_T7 7
55 #define MXT_GEN_ACQUIRE_T8 8
56 #define MXT_GEN_DATASOURCE_T53 53
57 #define MXT_TOUCH_MULTI_T9 9
58 #define MXT_TOUCH_KEYARRAY_T15 15
59 #define MXT_TOUCH_PROXIMITY_T23 23
60 #define MXT_TOUCH_PROXKEY_T52 52
61 #define MXT_PROCI_GRIPFACE_T20 20
62 #define MXT_PROCG_NOISE_T22 22
63 #define MXT_PROCI_ONETOUCH_T24 24
64 #define MXT_PROCI_TWOTOUCH_T27 27
65 #define MXT_PROCI_GRIP_T40 40
66 #define MXT_PROCI_PALM_T41 41
67 #define MXT_PROCI_TOUCHSUPPRESSION_T42 42
68 #define MXT_PROCI_STYLUS_T47 47
69 #define MXT_PROCG_NOISESUPPRESSION_T48 48
70 #define MXT_SPT_COMMSCONFIG_T18 18
71 #define MXT_SPT_GPIOPWM_T19 19
72 #define MXT_SPT_SELFTEST_T25 25
73 #define MXT_SPT_CTECONFIG_T28 28
74 #define MXT_SPT_USERDATA_T38 38
75 #define MXT_SPT_DIGITIZER_T43 43
76 #define MXT_SPT_MESSAGECOUNT_T44 44
77 #define MXT_SPT_CTECONFIG_T46 46
79 /* MXT_GEN_COMMAND_T6 field */
80 #define MXT_COMMAND_RESET 0
81 #define MXT_COMMAND_BACKUPNV 1
82 #define MXT_COMMAND_CALIBRATE 2
83 #define MXT_COMMAND_REPORTALL 3
84 #define MXT_COMMAND_DIAGNOSTIC 5
86 /* MXT_GEN_POWER_T7 field */
87 #define MXT_POWER_IDLEACQINT 0
88 #define MXT_POWER_ACTVACQINT 1
89 #define MXT_POWER_ACTV2IDLETO 2
91 /* MXT_GEN_ACQUIRE_T8 field */
92 #define MXT_ACQUIRE_CHRGTIME 0
93 #define MXT_ACQUIRE_TCHDRIFT 2
94 #define MXT_ACQUIRE_DRIFTST 3
95 #define MXT_ACQUIRE_TCHAUTOCAL 4
96 #define MXT_ACQUIRE_SYNC 5
97 #define MXT_ACQUIRE_ATCHCALST 6
98 #define MXT_ACQUIRE_ATCHCALSTHR 7
100 /* MXT_TOUCH_MULTI_T9 field */
101 #define MXT_TOUCH_CTRL 0
102 #define MXT_TOUCH_XORIGIN 1
103 #define MXT_TOUCH_YORIGIN 2
104 #define MXT_TOUCH_XSIZE 3
105 #define MXT_TOUCH_YSIZE 4
106 #define MXT_TOUCH_BLEN 6
107 #define MXT_TOUCH_TCHTHR 7
108 #define MXT_TOUCH_TCHDI 8
109 #define MXT_TOUCH_ORIENT 9
110 #define MXT_TOUCH_MOVHYSTI 11
111 #define MXT_TOUCH_MOVHYSTN 12
112 #define MXT_TOUCH_NUMTOUCH 14
113 #define MXT_TOUCH_MRGHYST 15
114 #define MXT_TOUCH_MRGTHR 16
115 #define MXT_TOUCH_AMPHYST 17
116 #define MXT_TOUCH_XRANGE_LSB 18
117 #define MXT_TOUCH_XRANGE_MSB 19
118 #define MXT_TOUCH_YRANGE_LSB 20
119 #define MXT_TOUCH_YRANGE_MSB 21
120 #define MXT_TOUCH_XLOCLIP 22
121 #define MXT_TOUCH_XHICLIP 23
122 #define MXT_TOUCH_YLOCLIP 24
123 #define MXT_TOUCH_YHICLIP 25
124 #define MXT_TOUCH_XEDGECTRL 26
125 #define MXT_TOUCH_XEDGEDIST 27
126 #define MXT_TOUCH_YEDGECTRL 28
127 #define MXT_TOUCH_YEDGEDIST 29
128 #define MXT_TOUCH_JUMPLIMIT 30
130 /* MXT_PROCI_GRIPFACE_T20 field */
131 #define MXT_GRIPFACE_CTRL 0
132 #define MXT_GRIPFACE_XLOGRIP 1
133 #define MXT_GRIPFACE_XHIGRIP 2
134 #define MXT_GRIPFACE_YLOGRIP 3
135 #define MXT_GRIPFACE_YHIGRIP 4
136 #define MXT_GRIPFACE_MAXTCHS 5
137 #define MXT_GRIPFACE_SZTHR1 7
138 #define MXT_GRIPFACE_SZTHR2 8
139 #define MXT_GRIPFACE_SHPTHR1 9
140 #define MXT_GRIPFACE_SHPTHR2 10
141 #define MXT_GRIPFACE_SUPEXTTO 11
143 /* MXT_PROCI_NOISE field */
144 #define MXT_NOISE_CTRL 0
145 #define MXT_NOISE_OUTFLEN 1
146 #define MXT_NOISE_GCAFUL_LSB 3
147 #define MXT_NOISE_GCAFUL_MSB 4
148 #define MXT_NOISE_GCAFLL_LSB 5
149 #define MXT_NOISE_GCAFLL_MSB 6
150 #define MXT_NOISE_ACTVGCAFVALID 7
151 #define MXT_NOISE_NOISETHR 8
152 #define MXT_NOISE_FREQHOPSCALE 10
153 #define MXT_NOISE_FREQ0 11
154 #define MXT_NOISE_FREQ1 12
155 #define MXT_NOISE_FREQ2 13
156 #define MXT_NOISE_FREQ3 14
157 #define MXT_NOISE_FREQ4 15
158 #define MXT_NOISE_IDLEGCAFVALID 16
160 /* MXT_SPT_COMMSCONFIG_T18 */
161 #define MXT_COMMS_CTRL 0
162 #define MXT_COMMS_CMD 1
164 /* MXT_SPT_CTECONFIG_T28 field */
165 #define MXT_CTE_CTRL 0
166 #define MXT_CTE_CMD 1
167 #define MXT_CTE_MODE 2
168 #define MXT_CTE_IDLEGCAFDEPTH 3
169 #define MXT_CTE_ACTVGCAFDEPTH 4
170 #define MXT_CTE_VOLTAGE 5
172 #define MXT_VOLTAGE_DEFAULT 2700000
173 #define MXT_VOLTAGE_STEP 10000
175 /* Define for MXT_GEN_COMMAND_T6 */
176 #define MXT_BOOT_VALUE 0xa5
177 #define MXT_BACKUP_VALUE 0x55
178 #define MXT_BACKUP_TIME 25 /* msec */
179 #define MXT_RESET_TIME 65 /* msec */
181 #define MXT_FWRESET_TIME 175 /* msec */
183 /* Command to unlock bootloader */
184 #define MXT_UNLOCK_CMD_MSB 0xaa
185 #define MXT_UNLOCK_CMD_LSB 0xdc
187 /* Bootloader mode status */
188 #define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */
189 #define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */
190 #define MXT_FRAME_CRC_CHECK 0x02
191 #define MXT_FRAME_CRC_FAIL 0x03
192 #define MXT_FRAME_CRC_PASS 0x04
193 #define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */
194 #define MXT_BOOT_STATUS_MASK 0x3f
197 #define MXT_SUPPRESS (1 << 1)
198 #define MXT_AMP (1 << 2)
199 #define MXT_VECTOR (1 << 3)
200 #define MXT_MOVE (1 << 4)
201 #define MXT_RELEASE (1 << 5)
202 #define MXT_PRESS (1 << 6)
203 #define MXT_DETECT (1 << 7)
205 /* Touch orient bits */
206 #define MXT_XY_SWITCH (1 << 0)
207 #define MXT_X_INVERT (1 << 1)
208 #define MXT_Y_INVERT (1 << 2)
210 /* Touchscreen absolute values */
211 #define MXT_MAX_AREA 0xff
213 #define MXT_MAX_FINGER 10
232 /* to map object and message */
249 /* Each client has this additional data */
251 struct i2c_client *client;
252 struct input_dev *input_dev;
253 char phys[64]; /* device physical location */
254 const struct mxt_platform_data *pdata;
255 struct mxt_object *object_table;
256 struct mxt_info info;
257 struct mxt_finger finger[MXT_MAX_FINGER];
263 static bool mxt_object_readable(unsigned int type)
266 case MXT_GEN_COMMAND_T6:
267 case MXT_GEN_POWER_T7:
268 case MXT_GEN_ACQUIRE_T8:
269 case MXT_GEN_DATASOURCE_T53:
270 case MXT_TOUCH_MULTI_T9:
271 case MXT_TOUCH_KEYARRAY_T15:
272 case MXT_TOUCH_PROXIMITY_T23:
273 case MXT_TOUCH_PROXKEY_T52:
274 case MXT_PROCI_GRIPFACE_T20:
275 case MXT_PROCG_NOISE_T22:
276 case MXT_PROCI_ONETOUCH_T24:
277 case MXT_PROCI_TWOTOUCH_T27:
278 case MXT_PROCI_GRIP_T40:
279 case MXT_PROCI_PALM_T41:
280 case MXT_PROCI_TOUCHSUPPRESSION_T42:
281 case MXT_PROCI_STYLUS_T47:
282 case MXT_PROCG_NOISESUPPRESSION_T48:
283 case MXT_SPT_COMMSCONFIG_T18:
284 case MXT_SPT_GPIOPWM_T19:
285 case MXT_SPT_SELFTEST_T25:
286 case MXT_SPT_CTECONFIG_T28:
287 case MXT_SPT_USERDATA_T38:
288 case MXT_SPT_DIGITIZER_T43:
289 case MXT_SPT_CTECONFIG_T46:
296 static bool mxt_object_writable(unsigned int type)
299 case MXT_GEN_COMMAND_T6:
300 case MXT_GEN_POWER_T7:
301 case MXT_GEN_ACQUIRE_T8:
302 case MXT_TOUCH_MULTI_T9:
303 case MXT_TOUCH_KEYARRAY_T15:
304 case MXT_TOUCH_PROXIMITY_T23:
305 case MXT_TOUCH_PROXKEY_T52:
306 case MXT_PROCI_GRIPFACE_T20:
307 case MXT_PROCG_NOISE_T22:
308 case MXT_PROCI_ONETOUCH_T24:
309 case MXT_PROCI_TWOTOUCH_T27:
310 case MXT_PROCI_GRIP_T40:
311 case MXT_PROCI_PALM_T41:
312 case MXT_PROCI_TOUCHSUPPRESSION_T42:
313 case MXT_PROCI_STYLUS_T47:
314 case MXT_PROCG_NOISESUPPRESSION_T48:
315 case MXT_SPT_COMMSCONFIG_T18:
316 case MXT_SPT_GPIOPWM_T19:
317 case MXT_SPT_SELFTEST_T25:
318 case MXT_SPT_CTECONFIG_T28:
319 case MXT_SPT_DIGITIZER_T43:
320 case MXT_SPT_CTECONFIG_T46:
327 static void mxt_dump_message(struct device *dev,
328 struct mxt_message *message)
330 dev_dbg(dev, "reportid: %u\tmessage: %02x %02x %02x %02x %02x %02x %02x\n",
331 message->reportid, message->message[0], message->message[1],
332 message->message[2], message->message[3], message->message[4],
333 message->message[5], message->message[6]);
336 static int mxt_check_bootloader(struct i2c_client *client,
342 if (i2c_master_recv(client, &val, 1) != 1) {
343 dev_err(&client->dev, "%s: i2c recv failed\n", __func__);
348 case MXT_WAITING_BOOTLOAD_CMD:
349 case MXT_WAITING_FRAME_DATA:
350 val &= ~MXT_BOOT_STATUS_MASK;
352 case MXT_FRAME_CRC_PASS:
353 if (val == MXT_FRAME_CRC_CHECK)
361 dev_err(&client->dev, "Unvalid bootloader mode state\n");
368 static int mxt_unlock_bootloader(struct i2c_client *client)
372 buf[0] = MXT_UNLOCK_CMD_LSB;
373 buf[1] = MXT_UNLOCK_CMD_MSB;
375 if (i2c_master_send(client, buf, 2) != 2) {
376 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
383 static int mxt_fw_write(struct i2c_client *client,
384 const u8 *data, unsigned int frame_size)
386 if (i2c_master_send(client, data, frame_size) != frame_size) {
387 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
394 static int __mxt_read_reg(struct i2c_client *client,
395 u16 reg, u16 len, void *val)
397 struct i2c_msg xfer[2];
402 buf[1] = (reg >> 8) & 0xff;
405 xfer[0].addr = client->addr;
411 xfer[1].addr = client->addr;
412 xfer[1].flags = I2C_M_RD;
416 ret = i2c_transfer(client->adapter, xfer, 2);
422 dev_err(&client->dev, "%s: i2c transfer failed (%d)\n",
429 static int mxt_read_reg(struct i2c_client *client, u16 reg, u8 *val)
431 return __mxt_read_reg(client, reg, 1, val);
434 static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
440 buf[1] = (reg >> 8) & 0xff;
443 ret = i2c_master_send(client, buf, 3);
449 dev_err(&client->dev, "%s: i2c send failed (%d)\n",
456 static int mxt_read_object_table(struct i2c_client *client,
457 u16 reg, u8 *object_buf)
459 return __mxt_read_reg(client, reg, MXT_OBJECT_SIZE,
463 static struct mxt_object *
464 mxt_get_object(struct mxt_data *data, u8 type)
466 struct mxt_object *object;
469 for (i = 0; i < data->info.object_num; i++) {
470 object = data->object_table + i;
471 if (object->type == type)
475 dev_err(&data->client->dev, "Invalid object type\n");
479 static int mxt_read_message(struct mxt_data *data,
480 struct mxt_message *message)
482 struct mxt_object *object;
485 object = mxt_get_object(data, MXT_GEN_MESSAGE_T5);
489 reg = object->start_address;
490 return __mxt_read_reg(data->client, reg,
491 sizeof(struct mxt_message), message);
494 static int mxt_write_object(struct mxt_data *data,
495 u8 type, u8 offset, u8 val)
497 struct mxt_object *object;
500 object = mxt_get_object(data, type);
501 if (!object || offset >= object->size + 1)
504 reg = object->start_address;
505 return mxt_write_reg(data->client, reg + offset, val);
508 static void mxt_input_report(struct mxt_data *data, int single_id)
510 struct mxt_finger *finger = data->finger;
511 struct input_dev *input_dev = data->input_dev;
512 int status = finger[single_id].status;
516 for (id = 0; id < MXT_MAX_FINGER; id++) {
517 if (!finger[id].status)
520 input_mt_slot(input_dev, id);
521 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER,
522 finger[id].status != MXT_RELEASE);
524 if (finger[id].status != MXT_RELEASE) {
526 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR,
528 input_report_abs(input_dev, ABS_MT_POSITION_X,
530 input_report_abs(input_dev, ABS_MT_POSITION_Y,
532 input_report_abs(input_dev, ABS_MT_PRESSURE,
533 finger[id].pressure);
535 finger[id].status = 0;
539 input_report_key(input_dev, BTN_TOUCH, finger_num > 0);
541 if (status != MXT_RELEASE) {
542 input_report_abs(input_dev, ABS_X, finger[single_id].x);
543 input_report_abs(input_dev, ABS_Y, finger[single_id].y);
544 input_report_abs(input_dev,
545 ABS_PRESSURE, finger[single_id].pressure);
548 input_sync(input_dev);
551 static void mxt_input_touchevent(struct mxt_data *data,
552 struct mxt_message *message, int id)
554 struct mxt_finger *finger = data->finger;
555 struct device *dev = &data->client->dev;
556 u8 status = message->message[0];
562 /* Check the touch is present on the screen */
563 if (!(status & MXT_DETECT)) {
564 if (status & MXT_RELEASE) {
565 dev_dbg(dev, "[%d] released\n", id);
567 finger[id].status = MXT_RELEASE;
568 mxt_input_report(data, id);
573 /* Check only AMP detection */
574 if (!(status & (MXT_PRESS | MXT_MOVE)))
577 x = (message->message[1] << 4) | ((message->message[3] >> 4) & 0xf);
578 y = (message->message[2] << 4) | ((message->message[3] & 0xf));
579 if (data->max_x < 1024)
581 if (data->max_y < 1024)
584 area = message->message[4];
585 pressure = message->message[5];
587 dev_dbg(dev, "[%d] %s x: %d, y: %d, area: %d\n", id,
588 status & MXT_MOVE ? "moved" : "pressed",
591 finger[id].status = status & MXT_MOVE ?
592 MXT_MOVE : MXT_PRESS;
595 finger[id].area = area;
596 finger[id].pressure = pressure;
598 mxt_input_report(data, id);
601 static irqreturn_t mxt_interrupt(int irq, void *dev_id)
603 struct mxt_data *data = dev_id;
604 struct mxt_message message;
605 struct mxt_object *object;
606 struct device *dev = &data->client->dev;
613 if (mxt_read_message(data, &message)) {
614 dev_err(dev, "Failed to read message\n");
618 reportid = message.reportid;
620 /* whether reportid is thing of MXT_TOUCH_MULTI_T9 */
621 object = mxt_get_object(data, MXT_TOUCH_MULTI_T9);
625 max_reportid = object->max_reportid;
626 min_reportid = max_reportid - object->num_report_ids + 1;
627 id = reportid - min_reportid;
629 if (reportid >= min_reportid && reportid <= max_reportid)
630 mxt_input_touchevent(data, &message, id);
632 mxt_dump_message(dev, &message);
633 } while (reportid != 0xff);
639 static int mxt_check_reg_init(struct mxt_data *data)
641 const struct mxt_platform_data *pdata = data->pdata;
642 struct mxt_object *object;
643 struct device *dev = &data->client->dev;
645 int i, j, config_offset;
647 if (!pdata->config) {
648 dev_dbg(dev, "No cfg data defined, skipping reg init\n");
652 for (i = 0; i < data->info.object_num; i++) {
653 object = data->object_table + i;
655 if (!mxt_object_writable(object->type))
659 j < (object->size + 1) * (object->instances + 1);
661 config_offset = index + j;
662 if (config_offset > pdata->config_length) {
663 dev_err(dev, "Not enough config data!\n");
666 mxt_write_object(data, object->type, j,
667 pdata->config[config_offset]);
669 index += (object->size + 1) * (object->instances + 1);
675 static int mxt_make_highchg(struct mxt_data *data)
677 struct device *dev = &data->client->dev;
678 struct mxt_message message;
682 /* Read dummy message to make high CHG pin */
684 error = mxt_read_message(data, &message);
687 } while (message.reportid != 0xff && --count);
690 dev_err(dev, "CHG pin isn't cleared\n");
697 static void mxt_handle_pdata(struct mxt_data *data)
699 const struct mxt_platform_data *pdata = data->pdata;
702 /* Set touchscreen lines */
703 mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_XSIZE,
705 mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_YSIZE,
708 /* Set touchscreen orient */
709 mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_ORIENT,
712 /* Set touchscreen burst length */
713 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
714 MXT_TOUCH_BLEN, pdata->blen);
716 /* Set touchscreen threshold */
717 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
718 MXT_TOUCH_TCHTHR, pdata->threshold);
720 /* Set touchscreen resolution */
721 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
722 MXT_TOUCH_XRANGE_LSB, (pdata->x_size - 1) & 0xff);
723 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
724 MXT_TOUCH_XRANGE_MSB, (pdata->x_size - 1) >> 8);
725 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
726 MXT_TOUCH_YRANGE_LSB, (pdata->y_size - 1) & 0xff);
727 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
728 MXT_TOUCH_YRANGE_MSB, (pdata->y_size - 1) >> 8);
730 /* Set touchscreen voltage */
731 if (pdata->voltage) {
732 if (pdata->voltage < MXT_VOLTAGE_DEFAULT) {
733 voltage = (MXT_VOLTAGE_DEFAULT - pdata->voltage) /
735 voltage = 0xff - voltage + 1;
737 voltage = (pdata->voltage - MXT_VOLTAGE_DEFAULT) /
740 mxt_write_object(data, MXT_SPT_CTECONFIG_T28,
741 MXT_CTE_VOLTAGE, voltage);
745 static int mxt_get_info(struct mxt_data *data)
747 struct i2c_client *client = data->client;
748 struct mxt_info *info = &data->info;
752 error = mxt_read_reg(client, MXT_FAMILY_ID, &val);
755 info->family_id = val;
757 error = mxt_read_reg(client, MXT_VARIANT_ID, &val);
760 info->variant_id = val;
762 error = mxt_read_reg(client, MXT_VERSION, &val);
767 error = mxt_read_reg(client, MXT_BUILD, &val);
772 error = mxt_read_reg(client, MXT_OBJECT_NUM, &val);
775 info->object_num = val;
780 static int mxt_get_object_table(struct mxt_data *data)
786 u8 buf[MXT_OBJECT_SIZE];
788 for (i = 0; i < data->info.object_num; i++) {
789 struct mxt_object *object = data->object_table + i;
791 reg = MXT_OBJECT_START + MXT_OBJECT_SIZE * i;
792 error = mxt_read_object_table(data->client, reg, buf);
796 object->type = buf[0];
797 object->start_address = (buf[2] << 8) | buf[1];
798 object->size = buf[3];
799 object->instances = buf[4];
800 object->num_report_ids = buf[5];
802 if (object->num_report_ids) {
803 reportid += object->num_report_ids *
804 (object->instances + 1);
805 object->max_reportid = reportid;
812 static int mxt_initialize(struct mxt_data *data)
814 struct i2c_client *client = data->client;
815 struct mxt_info *info = &data->info;
819 error = mxt_get_info(data);
823 data->object_table = kcalloc(info->object_num,
824 sizeof(struct mxt_object),
826 if (!data->object_table) {
827 dev_err(&client->dev, "Failed to allocate memory\n");
831 /* Get object table information */
832 error = mxt_get_object_table(data);
836 /* Check register init values */
837 error = mxt_check_reg_init(data);
841 mxt_handle_pdata(data);
843 /* Backup to memory */
844 mxt_write_object(data, MXT_GEN_COMMAND_T6,
845 MXT_COMMAND_BACKUPNV,
847 msleep(MXT_BACKUP_TIME);
850 mxt_write_object(data, MXT_GEN_COMMAND_T6,
851 MXT_COMMAND_RESET, 1);
852 msleep(MXT_RESET_TIME);
854 /* Update matrix size at info struct */
855 error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, &val);
858 info->matrix_xsize = val;
860 error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, &val);
863 info->matrix_ysize = val;
865 dev_info(&client->dev,
866 "Family ID: %d Variant ID: %d Version: %d Build: %d\n",
867 info->family_id, info->variant_id, info->version,
870 dev_info(&client->dev,
871 "Matrix X Size: %d Matrix Y Size: %d Object Num: %d\n",
872 info->matrix_xsize, info->matrix_ysize,
878 static void mxt_calc_resolution(struct mxt_data *data)
880 unsigned int max_x = data->pdata->x_size - 1;
881 unsigned int max_y = data->pdata->y_size - 1;
883 if (data->pdata->orient & MXT_XY_SWITCH) {
892 static ssize_t mxt_show_instance(char *buf, int count,
893 struct mxt_object *object, int instance,
898 if (object->instances > 0)
899 count += scnprintf(buf + count, PAGE_SIZE - count,
900 "Instance %u\n", instance);
902 for (i = 0; i < object->size + 1; i++)
903 count += scnprintf(buf + count, PAGE_SIZE - count,
904 "\t[%2u]: %02x (%d)\n", i, val[i], val[i]);
905 count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
910 static ssize_t mxt_object_show(struct device *dev,
911 struct device_attribute *attr, char *buf)
913 struct mxt_data *data = dev_get_drvdata(dev);
914 struct mxt_object *object;
920 /* Pre-allocate buffer large enough to hold max sized object. */
921 obuf = kmalloc(256, GFP_KERNEL);
926 for (i = 0; i < data->info.object_num; i++) {
927 object = data->object_table + i;
929 if (!mxt_object_readable(object->type))
932 count += scnprintf(buf + count, PAGE_SIZE - count,
933 "T%u:\n", object->type);
935 for (j = 0; j < object->instances + 1; j++) {
936 u16 size = object->size + 1;
937 u16 addr = object->start_address + j * size;
939 error = __mxt_read_reg(data->client, addr, size, obuf);
943 count = mxt_show_instance(buf, count, object, j, obuf);
949 return error ?: count;
952 static int mxt_load_fw(struct device *dev, const char *fn)
954 struct mxt_data *data = dev_get_drvdata(dev);
955 struct i2c_client *client = data->client;
956 const struct firmware *fw = NULL;
957 unsigned int frame_size;
958 unsigned int pos = 0;
961 ret = request_firmware(&fw, fn, dev);
963 dev_err(dev, "Unable to open firmware %s\n", fn);
967 /* Change to the bootloader mode */
968 mxt_write_object(data, MXT_GEN_COMMAND_T6,
969 MXT_COMMAND_RESET, MXT_BOOT_VALUE);
970 msleep(MXT_RESET_TIME);
972 /* Change to slave address of bootloader */
973 if (client->addr == MXT_APP_LOW)
974 client->addr = MXT_BOOT_LOW;
976 client->addr = MXT_BOOT_HIGH;
978 ret = mxt_check_bootloader(client, MXT_WAITING_BOOTLOAD_CMD);
982 /* Unlock bootloader */
983 mxt_unlock_bootloader(client);
985 while (pos < fw->size) {
986 ret = mxt_check_bootloader(client,
987 MXT_WAITING_FRAME_DATA);
991 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
993 /* We should add 2 at frame size as the the firmware data is not
994 * included the CRC bytes.
998 /* Write one frame to device */
999 mxt_fw_write(client, fw->data + pos, frame_size);
1001 ret = mxt_check_bootloader(client,
1002 MXT_FRAME_CRC_PASS);
1008 dev_dbg(dev, "Updated %d bytes / %zd bytes\n", pos, fw->size);
1012 release_firmware(fw);
1014 /* Change to slave address of application */
1015 if (client->addr == MXT_BOOT_LOW)
1016 client->addr = MXT_APP_LOW;
1018 client->addr = MXT_APP_HIGH;
1023 static ssize_t mxt_update_fw_store(struct device *dev,
1024 struct device_attribute *attr,
1025 const char *buf, size_t count)
1027 struct mxt_data *data = dev_get_drvdata(dev);
1030 disable_irq(data->irq);
1032 error = mxt_load_fw(dev, MXT_FW_NAME);
1034 dev_err(dev, "The firmware update failed(%d)\n", error);
1037 dev_dbg(dev, "The firmware update succeeded\n");
1039 /* Wait for reset */
1040 msleep(MXT_FWRESET_TIME);
1042 kfree(data->object_table);
1043 data->object_table = NULL;
1045 mxt_initialize(data);
1048 enable_irq(data->irq);
1050 error = mxt_make_highchg(data);
1057 static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
1058 static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
1060 static struct attribute *mxt_attrs[] = {
1061 &dev_attr_object.attr,
1062 &dev_attr_update_fw.attr,
1066 static const struct attribute_group mxt_attr_group = {
1070 static void mxt_start(struct mxt_data *data)
1073 mxt_write_object(data,
1074 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0x83);
1077 static void mxt_stop(struct mxt_data *data)
1080 mxt_write_object(data,
1081 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0);
1084 static int mxt_input_open(struct input_dev *dev)
1086 struct mxt_data *data = input_get_drvdata(dev);
1093 static void mxt_input_close(struct input_dev *dev)
1095 struct mxt_data *data = input_get_drvdata(dev);
1100 static int __devinit mxt_probe(struct i2c_client *client,
1101 const struct i2c_device_id *id)
1103 const struct mxt_platform_data *pdata = client->dev.platform_data;
1104 struct mxt_data *data;
1105 struct input_dev *input_dev;
1111 data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
1112 input_dev = input_allocate_device();
1113 if (!data || !input_dev) {
1114 dev_err(&client->dev, "Failed to allocate memory\n");
1119 input_dev->name = "Atmel maXTouch Touchscreen";
1120 snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
1121 client->adapter->nr, client->addr);
1122 input_dev->phys = data->phys;
1124 input_dev->id.bustype = BUS_I2C;
1125 input_dev->dev.parent = &client->dev;
1126 input_dev->open = mxt_input_open;
1127 input_dev->close = mxt_input_close;
1129 data->client = client;
1130 data->input_dev = input_dev;
1131 data->pdata = pdata;
1132 data->irq = client->irq;
1134 mxt_calc_resolution(data);
1136 __set_bit(EV_ABS, input_dev->evbit);
1137 __set_bit(EV_KEY, input_dev->evbit);
1138 __set_bit(BTN_TOUCH, input_dev->keybit);
1140 /* For single touch */
1141 input_set_abs_params(input_dev, ABS_X,
1142 0, data->max_x, 0, 0);
1143 input_set_abs_params(input_dev, ABS_Y,
1144 0, data->max_y, 0, 0);
1145 input_set_abs_params(input_dev, ABS_PRESSURE,
1148 /* For multi touch */
1149 error = input_mt_init_slots(input_dev, MXT_MAX_FINGER);
1152 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
1153 0, MXT_MAX_AREA, 0, 0);
1154 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
1155 0, data->max_x, 0, 0);
1156 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
1157 0, data->max_y, 0, 0);
1158 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
1161 input_set_drvdata(input_dev, data);
1162 i2c_set_clientdata(client, data);
1164 error = mxt_initialize(data);
1166 goto err_free_object;
1168 error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
1169 pdata->irqflags, client->name, data);
1171 dev_err(&client->dev, "Failed to register interrupt\n");
1172 goto err_free_object;
1175 error = mxt_make_highchg(data);
1179 error = input_register_device(input_dev);
1183 error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
1185 dev_warn(&client->dev, "error creating sysfs entries.\n");
1190 free_irq(client->irq, data);
1192 kfree(data->object_table);
1194 input_free_device(input_dev);
1199 static int __devexit mxt_remove(struct i2c_client *client)
1201 struct mxt_data *data = i2c_get_clientdata(client);
1203 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
1204 free_irq(data->irq, data);
1205 input_unregister_device(data->input_dev);
1206 kfree(data->object_table);
1212 #ifdef CONFIG_PM_SLEEP
1213 static int mxt_suspend(struct device *dev)
1215 struct i2c_client *client = to_i2c_client(dev);
1216 struct mxt_data *data = i2c_get_clientdata(client);
1217 struct input_dev *input_dev = data->input_dev;
1219 mutex_lock(&input_dev->mutex);
1221 if (input_dev->users)
1224 mutex_unlock(&input_dev->mutex);
1229 static int mxt_resume(struct device *dev)
1231 struct i2c_client *client = to_i2c_client(dev);
1232 struct mxt_data *data = i2c_get_clientdata(client);
1233 struct input_dev *input_dev = data->input_dev;
1236 mxt_write_object(data, MXT_GEN_COMMAND_T6,
1237 MXT_COMMAND_RESET, 1);
1239 msleep(MXT_RESET_TIME);
1241 mutex_lock(&input_dev->mutex);
1243 if (input_dev->users)
1246 mutex_unlock(&input_dev->mutex);
1252 static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
1254 static const struct i2c_device_id mxt_id[] = {
1255 { "qt602240_ts", 0 },
1256 { "atmel_mxt_ts", 0 },
1260 MODULE_DEVICE_TABLE(i2c, mxt_id);
1262 static struct i2c_driver mxt_driver = {
1264 .name = "atmel_mxt_ts",
1265 .owner = THIS_MODULE,
1269 .remove = __devexit_p(mxt_remove),
1273 module_i2c_driver(mxt_driver);
1275 /* Module information */
1276 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
1277 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
1278 MODULE_LICENSE("GPL");