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_MESSAGE_T5:
267 case MXT_GEN_COMMAND_T6:
268 case MXT_GEN_POWER_T7:
269 case MXT_GEN_ACQUIRE_T8:
270 case MXT_GEN_DATASOURCE_T53:
271 case MXT_TOUCH_MULTI_T9:
272 case MXT_TOUCH_KEYARRAY_T15:
273 case MXT_TOUCH_PROXIMITY_T23:
274 case MXT_TOUCH_PROXKEY_T52:
275 case MXT_PROCI_GRIPFACE_T20:
276 case MXT_PROCG_NOISE_T22:
277 case MXT_PROCI_ONETOUCH_T24:
278 case MXT_PROCI_TWOTOUCH_T27:
279 case MXT_PROCI_GRIP_T40:
280 case MXT_PROCI_PALM_T41:
281 case MXT_PROCI_TOUCHSUPPRESSION_T42:
282 case MXT_PROCI_STYLUS_T47:
283 case MXT_PROCG_NOISESUPPRESSION_T48:
284 case MXT_SPT_COMMSCONFIG_T18:
285 case MXT_SPT_GPIOPWM_T19:
286 case MXT_SPT_SELFTEST_T25:
287 case MXT_SPT_CTECONFIG_T28:
288 case MXT_SPT_USERDATA_T38:
289 case MXT_SPT_DIGITIZER_T43:
290 case MXT_SPT_CTECONFIG_T46:
297 static bool mxt_object_writable(unsigned int type)
300 case MXT_GEN_COMMAND_T6:
301 case MXT_GEN_POWER_T7:
302 case MXT_GEN_ACQUIRE_T8:
303 case MXT_TOUCH_MULTI_T9:
304 case MXT_TOUCH_KEYARRAY_T15:
305 case MXT_TOUCH_PROXIMITY_T23:
306 case MXT_TOUCH_PROXKEY_T52:
307 case MXT_PROCI_GRIPFACE_T20:
308 case MXT_PROCG_NOISE_T22:
309 case MXT_PROCI_ONETOUCH_T24:
310 case MXT_PROCI_TWOTOUCH_T27:
311 case MXT_PROCI_GRIP_T40:
312 case MXT_PROCI_PALM_T41:
313 case MXT_PROCI_TOUCHSUPPRESSION_T42:
314 case MXT_PROCI_STYLUS_T47:
315 case MXT_PROCG_NOISESUPPRESSION_T48:
316 case MXT_SPT_COMMSCONFIG_T18:
317 case MXT_SPT_GPIOPWM_T19:
318 case MXT_SPT_SELFTEST_T25:
319 case MXT_SPT_CTECONFIG_T28:
320 case MXT_SPT_DIGITIZER_T43:
321 case MXT_SPT_CTECONFIG_T46:
328 static void mxt_dump_message(struct device *dev,
329 struct mxt_message *message)
331 dev_dbg(dev, "reportid: %u\tmessage: %02x %02x %02x %02x %02x %02x %02x\n",
332 message->reportid, message->message[0], message->message[1],
333 message->message[2], message->message[3], message->message[4],
334 message->message[5], message->message[6]);
337 static int mxt_check_bootloader(struct i2c_client *client,
343 if (i2c_master_recv(client, &val, 1) != 1) {
344 dev_err(&client->dev, "%s: i2c recv failed\n", __func__);
349 case MXT_WAITING_BOOTLOAD_CMD:
350 case MXT_WAITING_FRAME_DATA:
351 val &= ~MXT_BOOT_STATUS_MASK;
353 case MXT_FRAME_CRC_PASS:
354 if (val == MXT_FRAME_CRC_CHECK)
362 dev_err(&client->dev, "Unvalid bootloader mode state\n");
369 static int mxt_unlock_bootloader(struct i2c_client *client)
373 buf[0] = MXT_UNLOCK_CMD_LSB;
374 buf[1] = MXT_UNLOCK_CMD_MSB;
376 if (i2c_master_send(client, buf, 2) != 2) {
377 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
384 static int mxt_fw_write(struct i2c_client *client,
385 const u8 *data, unsigned int frame_size)
387 if (i2c_master_send(client, data, frame_size) != frame_size) {
388 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
395 static int __mxt_read_reg(struct i2c_client *client,
396 u16 reg, u16 len, void *val)
398 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 if (i2c_transfer(client->adapter, xfer, 2) != 2) {
417 dev_err(&client->dev, "%s: i2c transfer failed\n", __func__);
424 static int mxt_read_reg(struct i2c_client *client, u16 reg, u8 *val)
426 return __mxt_read_reg(client, reg, 1, val);
429 static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
434 buf[1] = (reg >> 8) & 0xff;
437 if (i2c_master_send(client, buf, 3) != 3) {
438 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
445 static int mxt_read_object_table(struct i2c_client *client,
446 u16 reg, u8 *object_buf)
448 return __mxt_read_reg(client, reg, MXT_OBJECT_SIZE,
452 static struct mxt_object *
453 mxt_get_object(struct mxt_data *data, u8 type)
455 struct mxt_object *object;
458 for (i = 0; i < data->info.object_num; i++) {
459 object = data->object_table + i;
460 if (object->type == type)
464 dev_err(&data->client->dev, "Invalid object type\n");
468 static int mxt_read_message(struct mxt_data *data,
469 struct mxt_message *message)
471 struct mxt_object *object;
474 object = mxt_get_object(data, MXT_GEN_MESSAGE_T5);
478 reg = object->start_address;
479 return __mxt_read_reg(data->client, reg,
480 sizeof(struct mxt_message), message);
483 static int mxt_read_object(struct mxt_data *data,
484 u8 type, u8 offset, u8 *val)
486 struct mxt_object *object;
489 object = mxt_get_object(data, type);
493 reg = object->start_address;
494 return __mxt_read_reg(data->client, reg + offset, 1, val);
497 static int mxt_write_object(struct mxt_data *data,
498 u8 type, u8 offset, u8 val)
500 struct mxt_object *object;
503 object = mxt_get_object(data, type);
504 if (!object || offset >= object->size + 1)
507 reg = object->start_address;
508 return mxt_write_reg(data->client, reg + offset, val);
511 static void mxt_input_report(struct mxt_data *data, int single_id)
513 struct mxt_finger *finger = data->finger;
514 struct input_dev *input_dev = data->input_dev;
515 int status = finger[single_id].status;
519 for (id = 0; id < MXT_MAX_FINGER; id++) {
520 if (!finger[id].status)
523 input_mt_slot(input_dev, id);
524 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER,
525 finger[id].status != MXT_RELEASE);
527 if (finger[id].status != MXT_RELEASE) {
529 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR,
531 input_report_abs(input_dev, ABS_MT_POSITION_X,
533 input_report_abs(input_dev, ABS_MT_POSITION_Y,
535 input_report_abs(input_dev, ABS_MT_PRESSURE,
536 finger[id].pressure);
538 finger[id].status = 0;
542 input_report_key(input_dev, BTN_TOUCH, finger_num > 0);
544 if (status != MXT_RELEASE) {
545 input_report_abs(input_dev, ABS_X, finger[single_id].x);
546 input_report_abs(input_dev, ABS_Y, finger[single_id].y);
547 input_report_abs(input_dev,
548 ABS_PRESSURE, finger[single_id].pressure);
551 input_sync(input_dev);
554 static void mxt_input_touchevent(struct mxt_data *data,
555 struct mxt_message *message, int id)
557 struct mxt_finger *finger = data->finger;
558 struct device *dev = &data->client->dev;
559 u8 status = message->message[0];
565 /* Check the touch is present on the screen */
566 if (!(status & MXT_DETECT)) {
567 if (status & MXT_RELEASE) {
568 dev_dbg(dev, "[%d] released\n", id);
570 finger[id].status = MXT_RELEASE;
571 mxt_input_report(data, id);
576 /* Check only AMP detection */
577 if (!(status & (MXT_PRESS | MXT_MOVE)))
580 x = (message->message[1] << 4) | ((message->message[3] >> 4) & 0xf);
581 y = (message->message[2] << 4) | ((message->message[3] & 0xf));
582 if (data->max_x < 1024)
584 if (data->max_y < 1024)
587 area = message->message[4];
588 pressure = message->message[5];
590 dev_dbg(dev, "[%d] %s x: %d, y: %d, area: %d\n", id,
591 status & MXT_MOVE ? "moved" : "pressed",
594 finger[id].status = status & MXT_MOVE ?
595 MXT_MOVE : MXT_PRESS;
598 finger[id].area = area;
599 finger[id].pressure = pressure;
601 mxt_input_report(data, id);
604 static irqreturn_t mxt_interrupt(int irq, void *dev_id)
606 struct mxt_data *data = dev_id;
607 struct mxt_message message;
608 struct mxt_object *object;
609 struct device *dev = &data->client->dev;
616 if (mxt_read_message(data, &message)) {
617 dev_err(dev, "Failed to read message\n");
621 reportid = message.reportid;
623 /* whether reportid is thing of MXT_TOUCH_MULTI_T9 */
624 object = mxt_get_object(data, MXT_TOUCH_MULTI_T9);
628 max_reportid = object->max_reportid;
629 min_reportid = max_reportid - object->num_report_ids + 1;
630 id = reportid - min_reportid;
632 if (reportid >= min_reportid && reportid <= max_reportid)
633 mxt_input_touchevent(data, &message, id);
635 mxt_dump_message(dev, &message);
636 } while (reportid != 0xff);
642 static int mxt_check_reg_init(struct mxt_data *data)
644 const struct mxt_platform_data *pdata = data->pdata;
645 struct mxt_object *object;
646 struct device *dev = &data->client->dev;
648 int i, j, config_offset;
650 if (!pdata->config) {
651 dev_dbg(dev, "No cfg data defined, skipping reg init\n");
655 for (i = 0; i < data->info.object_num; i++) {
656 object = data->object_table + i;
658 if (!mxt_object_writable(object->type))
662 j < (object->size + 1) * (object->instances + 1);
664 config_offset = index + j;
665 if (config_offset > pdata->config_length) {
666 dev_err(dev, "Not enough config data!\n");
669 mxt_write_object(data, object->type, j,
670 pdata->config[config_offset]);
672 index += (object->size + 1) * (object->instances + 1);
678 static int mxt_make_highchg(struct mxt_data *data)
680 struct device *dev = &data->client->dev;
681 struct mxt_message message;
685 /* Read dummy message to make high CHG pin */
687 error = mxt_read_message(data, &message);
690 } while (message.reportid != 0xff && --count);
693 dev_err(dev, "CHG pin isn't cleared\n");
700 static void mxt_handle_pdata(struct mxt_data *data)
702 const struct mxt_platform_data *pdata = data->pdata;
705 /* Set touchscreen lines */
706 mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_XSIZE,
708 mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_YSIZE,
711 /* Set touchscreen orient */
712 mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_ORIENT,
715 /* Set touchscreen burst length */
716 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
717 MXT_TOUCH_BLEN, pdata->blen);
719 /* Set touchscreen threshold */
720 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
721 MXT_TOUCH_TCHTHR, pdata->threshold);
723 /* Set touchscreen resolution */
724 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
725 MXT_TOUCH_XRANGE_LSB, (pdata->x_size - 1) & 0xff);
726 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
727 MXT_TOUCH_XRANGE_MSB, (pdata->x_size - 1) >> 8);
728 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
729 MXT_TOUCH_YRANGE_LSB, (pdata->y_size - 1) & 0xff);
730 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
731 MXT_TOUCH_YRANGE_MSB, (pdata->y_size - 1) >> 8);
733 /* Set touchscreen voltage */
734 if (pdata->voltage) {
735 if (pdata->voltage < MXT_VOLTAGE_DEFAULT) {
736 voltage = (MXT_VOLTAGE_DEFAULT - pdata->voltage) /
738 voltage = 0xff - voltage + 1;
740 voltage = (pdata->voltage - MXT_VOLTAGE_DEFAULT) /
743 mxt_write_object(data, MXT_SPT_CTECONFIG_T28,
744 MXT_CTE_VOLTAGE, voltage);
748 static int mxt_get_info(struct mxt_data *data)
750 struct i2c_client *client = data->client;
751 struct mxt_info *info = &data->info;
755 error = mxt_read_reg(client, MXT_FAMILY_ID, &val);
758 info->family_id = val;
760 error = mxt_read_reg(client, MXT_VARIANT_ID, &val);
763 info->variant_id = val;
765 error = mxt_read_reg(client, MXT_VERSION, &val);
770 error = mxt_read_reg(client, MXT_BUILD, &val);
775 error = mxt_read_reg(client, MXT_OBJECT_NUM, &val);
778 info->object_num = val;
783 static int mxt_get_object_table(struct mxt_data *data)
789 u8 buf[MXT_OBJECT_SIZE];
791 for (i = 0; i < data->info.object_num; i++) {
792 struct mxt_object *object = data->object_table + i;
794 reg = MXT_OBJECT_START + MXT_OBJECT_SIZE * i;
795 error = mxt_read_object_table(data->client, reg, buf);
799 object->type = buf[0];
800 object->start_address = (buf[2] << 8) | buf[1];
801 object->size = buf[3];
802 object->instances = buf[4];
803 object->num_report_ids = buf[5];
805 if (object->num_report_ids) {
806 reportid += object->num_report_ids *
807 (object->instances + 1);
808 object->max_reportid = reportid;
815 static int mxt_initialize(struct mxt_data *data)
817 struct i2c_client *client = data->client;
818 struct mxt_info *info = &data->info;
822 error = mxt_get_info(data);
826 data->object_table = kcalloc(info->object_num,
827 sizeof(struct mxt_object),
829 if (!data->object_table) {
830 dev_err(&client->dev, "Failed to allocate memory\n");
834 /* Get object table information */
835 error = mxt_get_object_table(data);
839 /* Check register init values */
840 error = mxt_check_reg_init(data);
844 mxt_handle_pdata(data);
846 /* Backup to memory */
847 mxt_write_object(data, MXT_GEN_COMMAND_T6,
848 MXT_COMMAND_BACKUPNV,
850 msleep(MXT_BACKUP_TIME);
853 mxt_write_object(data, MXT_GEN_COMMAND_T6,
854 MXT_COMMAND_RESET, 1);
855 msleep(MXT_RESET_TIME);
857 /* Update matrix size at info struct */
858 error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, &val);
861 info->matrix_xsize = val;
863 error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, &val);
866 info->matrix_ysize = val;
868 dev_info(&client->dev,
869 "Family ID: %d Variant ID: %d Version: %d Build: %d\n",
870 info->family_id, info->variant_id, info->version,
873 dev_info(&client->dev,
874 "Matrix X Size: %d Matrix Y Size: %d Object Num: %d\n",
875 info->matrix_xsize, info->matrix_ysize,
881 static void mxt_calc_resolution(struct mxt_data *data)
883 unsigned int max_x = data->pdata->x_size - 1;
884 unsigned int max_y = data->pdata->y_size - 1;
886 if (data->pdata->orient & MXT_XY_SWITCH) {
895 static ssize_t mxt_object_show(struct device *dev,
896 struct device_attribute *attr, char *buf)
898 struct mxt_data *data = dev_get_drvdata(dev);
899 struct mxt_object *object;
905 for (i = 0; i < data->info.object_num; i++) {
906 object = data->object_table + i;
908 count += snprintf(buf + count, PAGE_SIZE - count,
909 "Object[%d] (Type %d)\n",
910 i + 1, object->type);
911 if (count >= PAGE_SIZE)
912 return PAGE_SIZE - 1;
914 if (!mxt_object_readable(object->type)) {
915 count += snprintf(buf + count, PAGE_SIZE - count,
917 if (count >= PAGE_SIZE)
918 return PAGE_SIZE - 1;
922 for (j = 0; j < object->size + 1; j++) {
923 error = mxt_read_object(data,
924 object->type, j, &val);
928 count += snprintf(buf + count, PAGE_SIZE - count,
929 "\t[%2d]: %02x (%d)\n", j, val, val);
930 if (count >= PAGE_SIZE)
931 return PAGE_SIZE - 1;
934 count += snprintf(buf + count, PAGE_SIZE - count, "\n");
935 if (count >= PAGE_SIZE)
936 return PAGE_SIZE - 1;
942 static int mxt_load_fw(struct device *dev, const char *fn)
944 struct mxt_data *data = dev_get_drvdata(dev);
945 struct i2c_client *client = data->client;
946 const struct firmware *fw = NULL;
947 unsigned int frame_size;
948 unsigned int pos = 0;
951 ret = request_firmware(&fw, fn, dev);
953 dev_err(dev, "Unable to open firmware %s\n", fn);
957 /* Change to the bootloader mode */
958 mxt_write_object(data, MXT_GEN_COMMAND_T6,
959 MXT_COMMAND_RESET, MXT_BOOT_VALUE);
960 msleep(MXT_RESET_TIME);
962 /* Change to slave address of bootloader */
963 if (client->addr == MXT_APP_LOW)
964 client->addr = MXT_BOOT_LOW;
966 client->addr = MXT_BOOT_HIGH;
968 ret = mxt_check_bootloader(client, MXT_WAITING_BOOTLOAD_CMD);
972 /* Unlock bootloader */
973 mxt_unlock_bootloader(client);
975 while (pos < fw->size) {
976 ret = mxt_check_bootloader(client,
977 MXT_WAITING_FRAME_DATA);
981 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
983 /* We should add 2 at frame size as the the firmware data is not
984 * included the CRC bytes.
988 /* Write one frame to device */
989 mxt_fw_write(client, fw->data + pos, frame_size);
991 ret = mxt_check_bootloader(client,
998 dev_dbg(dev, "Updated %d bytes / %zd bytes\n", pos, fw->size);
1002 release_firmware(fw);
1004 /* Change to slave address of application */
1005 if (client->addr == MXT_BOOT_LOW)
1006 client->addr = MXT_APP_LOW;
1008 client->addr = MXT_APP_HIGH;
1013 static ssize_t mxt_update_fw_store(struct device *dev,
1014 struct device_attribute *attr,
1015 const char *buf, size_t count)
1017 struct mxt_data *data = dev_get_drvdata(dev);
1020 disable_irq(data->irq);
1022 error = mxt_load_fw(dev, MXT_FW_NAME);
1024 dev_err(dev, "The firmware update failed(%d)\n", error);
1027 dev_dbg(dev, "The firmware update succeeded\n");
1029 /* Wait for reset */
1030 msleep(MXT_FWRESET_TIME);
1032 kfree(data->object_table);
1033 data->object_table = NULL;
1035 mxt_initialize(data);
1038 enable_irq(data->irq);
1040 error = mxt_make_highchg(data);
1047 static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
1048 static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
1050 static struct attribute *mxt_attrs[] = {
1051 &dev_attr_object.attr,
1052 &dev_attr_update_fw.attr,
1056 static const struct attribute_group mxt_attr_group = {
1060 static void mxt_start(struct mxt_data *data)
1063 mxt_write_object(data,
1064 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0x83);
1067 static void mxt_stop(struct mxt_data *data)
1070 mxt_write_object(data,
1071 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0);
1074 static int mxt_input_open(struct input_dev *dev)
1076 struct mxt_data *data = input_get_drvdata(dev);
1083 static void mxt_input_close(struct input_dev *dev)
1085 struct mxt_data *data = input_get_drvdata(dev);
1090 static int __devinit mxt_probe(struct i2c_client *client,
1091 const struct i2c_device_id *id)
1093 const struct mxt_platform_data *pdata = client->dev.platform_data;
1094 struct mxt_data *data;
1095 struct input_dev *input_dev;
1101 data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
1102 input_dev = input_allocate_device();
1103 if (!data || !input_dev) {
1104 dev_err(&client->dev, "Failed to allocate memory\n");
1109 input_dev->name = "Atmel maXTouch Touchscreen";
1110 snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
1111 client->adapter->nr, client->addr);
1112 input_dev->phys = data->phys;
1114 input_dev->id.bustype = BUS_I2C;
1115 input_dev->dev.parent = &client->dev;
1116 input_dev->open = mxt_input_open;
1117 input_dev->close = mxt_input_close;
1119 data->client = client;
1120 data->input_dev = input_dev;
1121 data->pdata = pdata;
1122 data->irq = client->irq;
1124 mxt_calc_resolution(data);
1126 __set_bit(EV_ABS, input_dev->evbit);
1127 __set_bit(EV_KEY, input_dev->evbit);
1128 __set_bit(BTN_TOUCH, input_dev->keybit);
1130 /* For single touch */
1131 input_set_abs_params(input_dev, ABS_X,
1132 0, data->max_x, 0, 0);
1133 input_set_abs_params(input_dev, ABS_Y,
1134 0, data->max_y, 0, 0);
1135 input_set_abs_params(input_dev, ABS_PRESSURE,
1138 /* For multi touch */
1139 input_mt_init_slots(input_dev, MXT_MAX_FINGER);
1140 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
1141 0, MXT_MAX_AREA, 0, 0);
1142 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
1143 0, data->max_x, 0, 0);
1144 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
1145 0, data->max_y, 0, 0);
1146 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
1149 input_set_drvdata(input_dev, data);
1150 i2c_set_clientdata(client, data);
1152 error = mxt_initialize(data);
1154 goto err_free_object;
1156 error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
1157 pdata->irqflags, client->name, data);
1159 dev_err(&client->dev, "Failed to register interrupt\n");
1160 goto err_free_object;
1163 error = mxt_make_highchg(data);
1167 error = input_register_device(input_dev);
1171 error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
1173 goto err_unregister_device;
1177 err_unregister_device:
1178 input_unregister_device(input_dev);
1181 free_irq(client->irq, data);
1183 kfree(data->object_table);
1185 input_free_device(input_dev);
1190 static int __devexit mxt_remove(struct i2c_client *client)
1192 struct mxt_data *data = i2c_get_clientdata(client);
1194 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
1195 free_irq(data->irq, data);
1196 input_unregister_device(data->input_dev);
1197 kfree(data->object_table);
1203 #ifdef CONFIG_PM_SLEEP
1204 static int mxt_suspend(struct device *dev)
1206 struct i2c_client *client = to_i2c_client(dev);
1207 struct mxt_data *data = i2c_get_clientdata(client);
1208 struct input_dev *input_dev = data->input_dev;
1210 mutex_lock(&input_dev->mutex);
1212 if (input_dev->users)
1215 mutex_unlock(&input_dev->mutex);
1220 static int mxt_resume(struct device *dev)
1222 struct i2c_client *client = to_i2c_client(dev);
1223 struct mxt_data *data = i2c_get_clientdata(client);
1224 struct input_dev *input_dev = data->input_dev;
1227 mxt_write_object(data, MXT_GEN_COMMAND_T6,
1228 MXT_COMMAND_RESET, 1);
1230 msleep(MXT_RESET_TIME);
1232 mutex_lock(&input_dev->mutex);
1234 if (input_dev->users)
1237 mutex_unlock(&input_dev->mutex);
1243 static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
1245 static const struct i2c_device_id mxt_id[] = {
1246 { "qt602240_ts", 0 },
1247 { "atmel_mxt_ts", 0 },
1251 MODULE_DEVICE_TABLE(i2c, mxt_id);
1253 static struct i2c_driver mxt_driver = {
1255 .name = "atmel_mxt_ts",
1256 .owner = THIS_MODULE,
1260 .remove = __devexit_p(mxt_remove),
1264 module_i2c_driver(mxt_driver);
1266 /* Module information */
1267 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
1268 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
1269 MODULE_LICENSE("GPL");