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.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 37
52 #define MXT_GEN_MESSAGE 5
53 #define MXT_GEN_COMMAND 6
54 #define MXT_GEN_POWER 7
55 #define MXT_GEN_ACQUIRE 8
56 #define MXT_TOUCH_MULTI 9
57 #define MXT_TOUCH_KEYARRAY 15
58 #define MXT_TOUCH_PROXIMITY 23
59 #define MXT_PROCI_GRIPFACE 20
60 #define MXT_PROCG_NOISE 22
61 #define MXT_PROCI_ONETOUCH 24
62 #define MXT_PROCI_TWOTOUCH 27
63 #define MXT_PROCI_GRIP 40
64 #define MXT_PROCI_PALM 41
65 #define MXT_SPT_COMMSCONFIG 18
66 #define MXT_SPT_GPIOPWM 19
67 #define MXT_SPT_SELFTEST 25
68 #define MXT_SPT_CTECONFIG 28
69 #define MXT_SPT_USERDATA 38
70 #define MXT_SPT_DIGITIZER 43
71 #define MXT_SPT_MESSAGECOUNT 44
73 /* MXT_GEN_COMMAND field */
74 #define MXT_COMMAND_RESET 0
75 #define MXT_COMMAND_BACKUPNV 1
76 #define MXT_COMMAND_CALIBRATE 2
77 #define MXT_COMMAND_REPORTALL 3
78 #define MXT_COMMAND_DIAGNOSTIC 5
80 /* MXT_GEN_POWER field */
81 #define MXT_POWER_IDLEACQINT 0
82 #define MXT_POWER_ACTVACQINT 1
83 #define MXT_POWER_ACTV2IDLETO 2
85 /* MXT_GEN_ACQUIRE field */
86 #define MXT_ACQUIRE_CHRGTIME 0
87 #define MXT_ACQUIRE_TCHDRIFT 2
88 #define MXT_ACQUIRE_DRIFTST 3
89 #define MXT_ACQUIRE_TCHAUTOCAL 4
90 #define MXT_ACQUIRE_SYNC 5
91 #define MXT_ACQUIRE_ATCHCALST 6
92 #define MXT_ACQUIRE_ATCHCALSTHR 7
94 /* MXT_TOUCH_MULTI field */
95 #define MXT_TOUCH_CTRL 0
96 #define MXT_TOUCH_XORIGIN 1
97 #define MXT_TOUCH_YORIGIN 2
98 #define MXT_TOUCH_XSIZE 3
99 #define MXT_TOUCH_YSIZE 4
100 #define MXT_TOUCH_BLEN 6
101 #define MXT_TOUCH_TCHTHR 7
102 #define MXT_TOUCH_TCHDI 8
103 #define MXT_TOUCH_ORIENT 9
104 #define MXT_TOUCH_MOVHYSTI 11
105 #define MXT_TOUCH_MOVHYSTN 12
106 #define MXT_TOUCH_NUMTOUCH 14
107 #define MXT_TOUCH_MRGHYST 15
108 #define MXT_TOUCH_MRGTHR 16
109 #define MXT_TOUCH_AMPHYST 17
110 #define MXT_TOUCH_XRANGE_LSB 18
111 #define MXT_TOUCH_XRANGE_MSB 19
112 #define MXT_TOUCH_YRANGE_LSB 20
113 #define MXT_TOUCH_YRANGE_MSB 21
114 #define MXT_TOUCH_XLOCLIP 22
115 #define MXT_TOUCH_XHICLIP 23
116 #define MXT_TOUCH_YLOCLIP 24
117 #define MXT_TOUCH_YHICLIP 25
118 #define MXT_TOUCH_XEDGECTRL 26
119 #define MXT_TOUCH_XEDGEDIST 27
120 #define MXT_TOUCH_YEDGECTRL 28
121 #define MXT_TOUCH_YEDGEDIST 29
122 #define MXT_TOUCH_JUMPLIMIT 30
124 /* MXT_PROCI_GRIPFACE field */
125 #define MXT_GRIPFACE_CTRL 0
126 #define MXT_GRIPFACE_XLOGRIP 1
127 #define MXT_GRIPFACE_XHIGRIP 2
128 #define MXT_GRIPFACE_YLOGRIP 3
129 #define MXT_GRIPFACE_YHIGRIP 4
130 #define MXT_GRIPFACE_MAXTCHS 5
131 #define MXT_GRIPFACE_SZTHR1 7
132 #define MXT_GRIPFACE_SZTHR2 8
133 #define MXT_GRIPFACE_SHPTHR1 9
134 #define MXT_GRIPFACE_SHPTHR2 10
135 #define MXT_GRIPFACE_SUPEXTTO 11
137 /* MXT_PROCI_NOISE field */
138 #define MXT_NOISE_CTRL 0
139 #define MXT_NOISE_OUTFLEN 1
140 #define MXT_NOISE_GCAFUL_LSB 3
141 #define MXT_NOISE_GCAFUL_MSB 4
142 #define MXT_NOISE_GCAFLL_LSB 5
143 #define MXT_NOISE_GCAFLL_MSB 6
144 #define MXT_NOISE_ACTVGCAFVALID 7
145 #define MXT_NOISE_NOISETHR 8
146 #define MXT_NOISE_FREQHOPSCALE 10
147 #define MXT_NOISE_FREQ0 11
148 #define MXT_NOISE_FREQ1 12
149 #define MXT_NOISE_FREQ2 13
150 #define MXT_NOISE_FREQ3 14
151 #define MXT_NOISE_FREQ4 15
152 #define MXT_NOISE_IDLEGCAFVALID 16
154 /* MXT_SPT_COMMSCONFIG */
155 #define MXT_COMMS_CTRL 0
156 #define MXT_COMMS_CMD 1
158 /* MXT_SPT_CTECONFIG field */
159 #define MXT_CTE_CTRL 0
160 #define MXT_CTE_CMD 1
161 #define MXT_CTE_MODE 2
162 #define MXT_CTE_IDLEGCAFDEPTH 3
163 #define MXT_CTE_ACTVGCAFDEPTH 4
164 #define MXT_CTE_VOLTAGE 5
166 #define MXT_VOLTAGE_DEFAULT 2700000
167 #define MXT_VOLTAGE_STEP 10000
169 /* Define for MXT_GEN_COMMAND */
170 #define MXT_BOOT_VALUE 0xa5
171 #define MXT_BACKUP_VALUE 0x55
172 #define MXT_BACKUP_TIME 25 /* msec */
173 #define MXT_RESET_TIME 65 /* msec */
175 #define MXT_FWRESET_TIME 175 /* msec */
177 /* Command to unlock bootloader */
178 #define MXT_UNLOCK_CMD_MSB 0xaa
179 #define MXT_UNLOCK_CMD_LSB 0xdc
181 /* Bootloader mode status */
182 #define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */
183 #define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */
184 #define MXT_FRAME_CRC_CHECK 0x02
185 #define MXT_FRAME_CRC_FAIL 0x03
186 #define MXT_FRAME_CRC_PASS 0x04
187 #define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */
188 #define MXT_BOOT_STATUS_MASK 0x3f
191 #define MXT_SUPPRESS (1 << 1)
192 #define MXT_AMP (1 << 2)
193 #define MXT_VECTOR (1 << 3)
194 #define MXT_MOVE (1 << 4)
195 #define MXT_RELEASE (1 << 5)
196 #define MXT_PRESS (1 << 6)
197 #define MXT_DETECT (1 << 7)
199 /* Touchscreen absolute values */
200 #define MXT_MAX_XC 0x3ff
201 #define MXT_MAX_YC 0x3ff
202 #define MXT_MAX_AREA 0xff
204 #define MXT_MAX_FINGER 10
223 /* to map object and message */
240 /* Each client has this additional data */
242 struct i2c_client *client;
243 struct input_dev *input_dev;
244 const struct mxt_platform_data *pdata;
245 struct mxt_object *object_table;
246 struct mxt_info info;
247 struct mxt_finger finger[MXT_MAX_FINGER];
251 static bool mxt_object_readable(unsigned int type)
254 case MXT_GEN_MESSAGE:
255 case MXT_GEN_COMMAND:
257 case MXT_GEN_ACQUIRE:
258 case MXT_TOUCH_MULTI:
259 case MXT_TOUCH_KEYARRAY:
260 case MXT_TOUCH_PROXIMITY:
261 case MXT_PROCI_GRIPFACE:
262 case MXT_PROCG_NOISE:
263 case MXT_PROCI_ONETOUCH:
264 case MXT_PROCI_TWOTOUCH:
267 case MXT_SPT_COMMSCONFIG:
268 case MXT_SPT_GPIOPWM:
269 case MXT_SPT_SELFTEST:
270 case MXT_SPT_CTECONFIG:
271 case MXT_SPT_USERDATA:
278 static bool mxt_object_writable(unsigned int type)
281 case MXT_GEN_COMMAND:
283 case MXT_GEN_ACQUIRE:
284 case MXT_TOUCH_MULTI:
285 case MXT_TOUCH_KEYARRAY:
286 case MXT_TOUCH_PROXIMITY:
287 case MXT_PROCI_GRIPFACE:
288 case MXT_PROCG_NOISE:
289 case MXT_PROCI_ONETOUCH:
290 case MXT_PROCI_TWOTOUCH:
293 case MXT_SPT_GPIOPWM:
294 case MXT_SPT_SELFTEST:
295 case MXT_SPT_CTECONFIG:
302 static void mxt_dump_message(struct device *dev,
303 struct mxt_message *message)
305 dev_dbg(dev, "reportid:\t0x%x\n", message->reportid);
306 dev_dbg(dev, "message1:\t0x%x\n", message->message[0]);
307 dev_dbg(dev, "message2:\t0x%x\n", message->message[1]);
308 dev_dbg(dev, "message3:\t0x%x\n", message->message[2]);
309 dev_dbg(dev, "message4:\t0x%x\n", message->message[3]);
310 dev_dbg(dev, "message5:\t0x%x\n", message->message[4]);
311 dev_dbg(dev, "message6:\t0x%x\n", message->message[5]);
312 dev_dbg(dev, "message7:\t0x%x\n", message->message[6]);
313 dev_dbg(dev, "checksum:\t0x%x\n", message->checksum);
316 static int mxt_check_bootloader(struct i2c_client *client,
322 if (i2c_master_recv(client, &val, 1) != 1) {
323 dev_err(&client->dev, "%s: i2c recv failed\n", __func__);
328 case MXT_WAITING_BOOTLOAD_CMD:
329 case MXT_WAITING_FRAME_DATA:
330 val &= ~MXT_BOOT_STATUS_MASK;
332 case MXT_FRAME_CRC_PASS:
333 if (val == MXT_FRAME_CRC_CHECK)
341 dev_err(&client->dev, "Unvalid bootloader mode state\n");
348 static int mxt_unlock_bootloader(struct i2c_client *client)
352 buf[0] = MXT_UNLOCK_CMD_LSB;
353 buf[1] = MXT_UNLOCK_CMD_MSB;
355 if (i2c_master_send(client, buf, 2) != 2) {
356 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
363 static int mxt_fw_write(struct i2c_client *client,
364 const u8 *data, unsigned int frame_size)
366 if (i2c_master_send(client, data, frame_size) != frame_size) {
367 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
374 static int __mxt_read_reg(struct i2c_client *client,
375 u16 reg, u16 len, void *val)
377 struct i2c_msg xfer[2];
381 buf[1] = (reg >> 8) & 0xff;
384 xfer[0].addr = client->addr;
390 xfer[1].addr = client->addr;
391 xfer[1].flags = I2C_M_RD;
395 if (i2c_transfer(client->adapter, xfer, 2) != 2) {
396 dev_err(&client->dev, "%s: i2c transfer failed\n", __func__);
403 static int mxt_read_reg(struct i2c_client *client, u16 reg, u8 *val)
405 return __mxt_read_reg(client, reg, 1, val);
408 static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
413 buf[1] = (reg >> 8) & 0xff;
416 if (i2c_master_send(client, buf, 3) != 3) {
417 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
424 static int mxt_read_object_table(struct i2c_client *client,
425 u16 reg, u8 *object_buf)
427 return __mxt_read_reg(client, reg, MXT_OBJECT_SIZE,
431 static struct mxt_object *
432 mxt_get_object(struct mxt_data *data, u8 type)
434 struct mxt_object *object;
437 for (i = 0; i < data->info.object_num; i++) {
438 object = data->object_table + i;
439 if (object->type == type)
443 dev_err(&data->client->dev, "Invalid object type\n");
447 static int mxt_read_message(struct mxt_data *data,
448 struct mxt_message *message)
450 struct mxt_object *object;
453 object = mxt_get_object(data, MXT_GEN_MESSAGE);
457 reg = object->start_address;
458 return __mxt_read_reg(data->client, reg,
459 sizeof(struct mxt_message), message);
462 static int mxt_read_object(struct mxt_data *data,
463 u8 type, u8 offset, u8 *val)
465 struct mxt_object *object;
468 object = mxt_get_object(data, type);
472 reg = object->start_address;
473 return __mxt_read_reg(data->client, reg + offset, 1, val);
476 static int mxt_write_object(struct mxt_data *data,
477 u8 type, u8 offset, u8 val)
479 struct mxt_object *object;
482 object = mxt_get_object(data, type);
486 reg = object->start_address;
487 return mxt_write_reg(data->client, reg + offset, val);
490 static void mxt_input_report(struct mxt_data *data, int single_id)
492 struct mxt_finger *finger = data->finger;
493 struct input_dev *input_dev = data->input_dev;
494 int status = finger[single_id].status;
498 for (id = 0; id < MXT_MAX_FINGER; id++) {
499 if (!finger[id].status)
502 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR,
503 finger[id].status != MXT_RELEASE ?
504 finger[id].area : 0);
505 input_report_abs(input_dev, ABS_MT_POSITION_X,
507 input_report_abs(input_dev, ABS_MT_POSITION_Y,
509 input_mt_sync(input_dev);
511 if (finger[id].status == MXT_RELEASE)
512 finger[id].status = 0;
517 input_report_key(input_dev, BTN_TOUCH, finger_num > 0);
519 if (status != MXT_RELEASE) {
520 input_report_abs(input_dev, ABS_X, finger[single_id].x);
521 input_report_abs(input_dev, ABS_Y, finger[single_id].y);
524 input_sync(input_dev);
527 static void mxt_input_touchevent(struct mxt_data *data,
528 struct mxt_message *message, int id)
530 struct mxt_finger *finger = data->finger;
531 struct device *dev = &data->client->dev;
532 u8 status = message->message[0];
537 /* Check the touch is present on the screen */
538 if (!(status & MXT_DETECT)) {
539 if (status & MXT_RELEASE) {
540 dev_dbg(dev, "[%d] released\n", id);
542 finger[id].status = MXT_RELEASE;
543 mxt_input_report(data, id);
548 /* Check only AMP detection */
549 if (!(status & (MXT_PRESS | MXT_MOVE)))
552 x = (message->message[1] << 2) | ((message->message[3] & ~0x3f) >> 6);
553 y = (message->message[2] << 2) | ((message->message[3] & ~0xf3) >> 2);
554 area = message->message[4];
556 dev_dbg(dev, "[%d] %s x: %d, y: %d, area: %d\n", id,
557 status & MXT_MOVE ? "moved" : "pressed",
560 finger[id].status = status & MXT_MOVE ?
561 MXT_MOVE : MXT_PRESS;
564 finger[id].area = area;
566 mxt_input_report(data, id);
569 static irqreturn_t mxt_interrupt(int irq, void *dev_id)
571 struct mxt_data *data = dev_id;
572 struct mxt_message message;
573 struct mxt_object *object;
574 struct device *dev = &data->client->dev;
581 if (mxt_read_message(data, &message)) {
582 dev_err(dev, "Failed to read message\n");
586 reportid = message.reportid;
588 /* whether reportid is thing of MXT_TOUCH_MULTI */
589 object = mxt_get_object(data, MXT_TOUCH_MULTI);
593 max_reportid = object->max_reportid;
594 min_reportid = max_reportid - object->num_report_ids + 1;
595 id = reportid - min_reportid;
597 if (reportid >= min_reportid && reportid <= max_reportid)
598 mxt_input_touchevent(data, &message, id);
600 mxt_dump_message(dev, &message);
601 } while (reportid != 0xff);
607 static int mxt_check_reg_init(struct mxt_data *data)
609 const struct mxt_platform_data *pdata = data->pdata;
610 struct mxt_object *object;
611 struct device *dev = &data->client->dev;
613 int i, j, config_offset;
615 if (!pdata->config) {
616 dev_dbg(dev, "No cfg data defined, skipping reg init\n");
620 for (i = 0; i < data->info.object_num; i++) {
621 object = data->object_table + i;
623 if (!mxt_object_writable(object->type))
626 for (j = 0; j < object->size + 1; j++) {
627 config_offset = index + j;
628 if (config_offset > pdata->config_length) {
629 dev_err(dev, "Not enough config data!\n");
632 mxt_write_object(data, object->type, j,
633 pdata->config[config_offset]);
635 index += object->size + 1;
641 static int mxt_make_highchg(struct mxt_data *data)
643 struct device *dev = &data->client->dev;
644 struct mxt_message message;
648 /* Read dummy message to make high CHG pin */
650 error = mxt_read_message(data, &message);
653 } while (message.reportid != 0xff && --count);
656 dev_err(dev, "CHG pin isn't cleared\n");
663 static void mxt_handle_pdata(struct mxt_data *data)
665 const struct mxt_platform_data *pdata = data->pdata;
668 /* Set touchscreen lines */
669 mxt_write_object(data, MXT_TOUCH_MULTI, MXT_TOUCH_XSIZE,
671 mxt_write_object(data, MXT_TOUCH_MULTI, MXT_TOUCH_YSIZE,
674 /* Set touchscreen orient */
675 mxt_write_object(data, MXT_TOUCH_MULTI, MXT_TOUCH_ORIENT,
678 /* Set touchscreen burst length */
679 mxt_write_object(data, MXT_TOUCH_MULTI,
680 MXT_TOUCH_BLEN, pdata->blen);
682 /* Set touchscreen threshold */
683 mxt_write_object(data, MXT_TOUCH_MULTI,
684 MXT_TOUCH_TCHTHR, pdata->threshold);
686 /* Set touchscreen resolution */
687 mxt_write_object(data, MXT_TOUCH_MULTI,
688 MXT_TOUCH_XRANGE_LSB, (pdata->x_size - 1) & 0xff);
689 mxt_write_object(data, MXT_TOUCH_MULTI,
690 MXT_TOUCH_XRANGE_MSB, (pdata->x_size - 1) >> 8);
691 mxt_write_object(data, MXT_TOUCH_MULTI,
692 MXT_TOUCH_YRANGE_LSB, (pdata->y_size - 1) & 0xff);
693 mxt_write_object(data, MXT_TOUCH_MULTI,
694 MXT_TOUCH_YRANGE_MSB, (pdata->y_size - 1) >> 8);
696 /* Set touchscreen voltage */
697 if (pdata->voltage) {
698 if (pdata->voltage < MXT_VOLTAGE_DEFAULT) {
699 voltage = (MXT_VOLTAGE_DEFAULT - pdata->voltage) /
701 voltage = 0xff - voltage + 1;
703 voltage = (pdata->voltage - MXT_VOLTAGE_DEFAULT) /
706 mxt_write_object(data, MXT_SPT_CTECONFIG,
707 MXT_CTE_VOLTAGE, voltage);
711 static int mxt_get_info(struct mxt_data *data)
713 struct i2c_client *client = data->client;
714 struct mxt_info *info = &data->info;
718 error = mxt_read_reg(client, MXT_FAMILY_ID, &val);
721 info->family_id = val;
723 error = mxt_read_reg(client, MXT_VARIANT_ID, &val);
726 info->variant_id = val;
728 error = mxt_read_reg(client, MXT_VERSION, &val);
733 error = mxt_read_reg(client, MXT_BUILD, &val);
738 error = mxt_read_reg(client, MXT_OBJECT_NUM, &val);
741 info->object_num = val;
746 static int mxt_get_object_table(struct mxt_data *data)
752 u8 buf[MXT_OBJECT_SIZE];
754 for (i = 0; i < data->info.object_num; i++) {
755 struct mxt_object *object = data->object_table + i;
757 reg = MXT_OBJECT_START + MXT_OBJECT_SIZE * i;
758 error = mxt_read_object_table(data->client, reg, buf);
762 object->type = buf[0];
763 object->start_address = (buf[2] << 8) | buf[1];
764 object->size = buf[3];
765 object->instances = buf[4];
766 object->num_report_ids = buf[5];
768 if (object->num_report_ids) {
769 reportid += object->num_report_ids *
770 (object->instances + 1);
771 object->max_reportid = reportid;
778 static int mxt_initialize(struct mxt_data *data)
780 struct i2c_client *client = data->client;
781 struct mxt_info *info = &data->info;
785 error = mxt_get_info(data);
789 data->object_table = kcalloc(info->object_num,
790 sizeof(struct mxt_object),
792 if (!data->object_table) {
793 dev_err(&client->dev, "Failed to allocate memory\n");
797 /* Get object table information */
798 error = mxt_get_object_table(data);
802 /* Check register init values */
803 error = mxt_check_reg_init(data);
807 error = mxt_make_highchg(data);
811 mxt_handle_pdata(data);
813 /* Backup to memory */
814 mxt_write_object(data, MXT_GEN_COMMAND,
815 MXT_COMMAND_BACKUPNV,
817 msleep(MXT_BACKUP_TIME);
820 mxt_write_object(data, MXT_GEN_COMMAND,
821 MXT_COMMAND_RESET, 1);
822 msleep(MXT_RESET_TIME);
824 /* Update matrix size at info struct */
825 error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, &val);
828 info->matrix_xsize = val;
830 error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, &val);
833 info->matrix_ysize = val;
835 dev_info(&client->dev,
836 "Family ID: %d Variant ID: %d Version: %d Build: %d\n",
837 info->family_id, info->variant_id, info->version,
840 dev_info(&client->dev,
841 "Matrix X Size: %d Matrix Y Size: %d Object Num: %d\n",
842 info->matrix_xsize, info->matrix_ysize,
848 static ssize_t mxt_object_show(struct device *dev,
849 struct device_attribute *attr, char *buf)
851 struct mxt_data *data = dev_get_drvdata(dev);
852 struct mxt_object *object;
858 for (i = 0; i < data->info.object_num; i++) {
859 object = data->object_table + i;
861 count += sprintf(buf + count,
862 "Object Table Element %d(Type %d)\n",
863 i + 1, object->type);
865 if (!mxt_object_readable(object->type)) {
866 count += sprintf(buf + count, "\n");
870 for (j = 0; j < object->size + 1; j++) {
871 error = mxt_read_object(data,
872 object->type, j, &val);
876 count += sprintf(buf + count,
877 " Byte %d: 0x%x (%d)\n", j, val, val);
880 count += sprintf(buf + count, "\n");
886 static int mxt_load_fw(struct device *dev, const char *fn)
888 struct mxt_data *data = dev_get_drvdata(dev);
889 struct i2c_client *client = data->client;
890 const struct firmware *fw = NULL;
891 unsigned int frame_size;
892 unsigned int pos = 0;
895 ret = request_firmware(&fw, fn, dev);
897 dev_err(dev, "Unable to open firmware %s\n", fn);
901 /* Change to the bootloader mode */
902 mxt_write_object(data, MXT_GEN_COMMAND,
903 MXT_COMMAND_RESET, MXT_BOOT_VALUE);
904 msleep(MXT_RESET_TIME);
906 /* Change to slave address of bootloader */
907 if (client->addr == MXT_APP_LOW)
908 client->addr = MXT_BOOT_LOW;
910 client->addr = MXT_BOOT_HIGH;
912 ret = mxt_check_bootloader(client, MXT_WAITING_BOOTLOAD_CMD);
916 /* Unlock bootloader */
917 mxt_unlock_bootloader(client);
919 while (pos < fw->size) {
920 ret = mxt_check_bootloader(client,
921 MXT_WAITING_FRAME_DATA);
925 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
927 /* We should add 2 at frame size as the the firmware data is not
928 * included the CRC bytes.
932 /* Write one frame to device */
933 mxt_fw_write(client, fw->data + pos, frame_size);
935 ret = mxt_check_bootloader(client,
942 dev_dbg(dev, "Updated %d bytes / %zd bytes\n", pos, fw->size);
946 release_firmware(fw);
948 /* Change to slave address of application */
949 if (client->addr == MXT_BOOT_LOW)
950 client->addr = MXT_APP_LOW;
952 client->addr = MXT_APP_HIGH;
957 static ssize_t mxt_update_fw_store(struct device *dev,
958 struct device_attribute *attr,
959 const char *buf, size_t count)
961 struct mxt_data *data = dev_get_drvdata(dev);
964 disable_irq(data->irq);
966 error = mxt_load_fw(dev, MXT_FW_NAME);
968 dev_err(dev, "The firmware update failed(%d)\n", error);
971 dev_dbg(dev, "The firmware update succeeded\n");
974 msleep(MXT_FWRESET_TIME);
976 kfree(data->object_table);
977 data->object_table = NULL;
979 mxt_initialize(data);
982 enable_irq(data->irq);
987 static DEVICE_ATTR(object, 0444, mxt_object_show, NULL);
988 static DEVICE_ATTR(update_fw, 0664, NULL, mxt_update_fw_store);
990 static struct attribute *mxt_attrs[] = {
991 &dev_attr_object.attr,
992 &dev_attr_update_fw.attr,
996 static const struct attribute_group mxt_attr_group = {
1000 static void mxt_start(struct mxt_data *data)
1003 mxt_write_object(data,
1004 MXT_TOUCH_MULTI, MXT_TOUCH_CTRL, 0x83);
1007 static void mxt_stop(struct mxt_data *data)
1010 mxt_write_object(data,
1011 MXT_TOUCH_MULTI, MXT_TOUCH_CTRL, 0);
1014 static int mxt_input_open(struct input_dev *dev)
1016 struct mxt_data *data = input_get_drvdata(dev);
1023 static void mxt_input_close(struct input_dev *dev)
1025 struct mxt_data *data = input_get_drvdata(dev);
1030 static int __devinit mxt_probe(struct i2c_client *client,
1031 const struct i2c_device_id *id)
1033 const struct mxt_platform_data *pdata = client->dev.platform_data;
1034 struct mxt_data *data;
1035 struct input_dev *input_dev;
1041 data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
1042 input_dev = input_allocate_device();
1043 if (!data || !input_dev) {
1044 dev_err(&client->dev, "Failed to allocate memory\n");
1049 input_dev->name = "Atmel maXTouch Touchscreen";
1050 input_dev->id.bustype = BUS_I2C;
1051 input_dev->dev.parent = &client->dev;
1052 input_dev->open = mxt_input_open;
1053 input_dev->close = mxt_input_close;
1055 __set_bit(EV_ABS, input_dev->evbit);
1056 __set_bit(EV_KEY, input_dev->evbit);
1057 __set_bit(BTN_TOUCH, input_dev->keybit);
1059 /* For single touch */
1060 input_set_abs_params(input_dev, ABS_X,
1061 0, MXT_MAX_XC, 0, 0);
1062 input_set_abs_params(input_dev, ABS_Y,
1063 0, MXT_MAX_YC, 0, 0);
1065 /* For multi touch */
1066 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
1067 0, MXT_MAX_AREA, 0, 0);
1068 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
1069 0, MXT_MAX_XC, 0, 0);
1070 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
1071 0, MXT_MAX_YC, 0, 0);
1073 input_set_drvdata(input_dev, data);
1075 data->client = client;
1076 data->input_dev = input_dev;
1077 data->pdata = pdata;
1078 data->irq = client->irq;
1080 i2c_set_clientdata(client, data);
1082 error = mxt_initialize(data);
1084 goto err_free_object;
1086 error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
1087 pdata->irqflags, client->dev.driver->name, data);
1089 dev_err(&client->dev, "Failed to register interrupt\n");
1090 goto err_free_object;
1093 error = input_register_device(input_dev);
1097 error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
1099 goto err_unregister_device;
1103 err_unregister_device:
1104 input_unregister_device(input_dev);
1107 free_irq(client->irq, data);
1109 kfree(data->object_table);
1111 input_free_device(input_dev);
1116 static int __devexit mxt_remove(struct i2c_client *client)
1118 struct mxt_data *data = i2c_get_clientdata(client);
1120 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
1121 free_irq(data->irq, data);
1122 input_unregister_device(data->input_dev);
1123 kfree(data->object_table);
1130 static int mxt_suspend(struct device *dev)
1132 struct i2c_client *client = to_i2c_client(dev);
1133 struct mxt_data *data = i2c_get_clientdata(client);
1134 struct input_dev *input_dev = data->input_dev;
1136 mutex_lock(&input_dev->mutex);
1138 if (input_dev->users)
1141 mutex_unlock(&input_dev->mutex);
1146 static int mxt_resume(struct device *dev)
1148 struct i2c_client *client = to_i2c_client(dev);
1149 struct mxt_data *data = i2c_get_clientdata(client);
1150 struct input_dev *input_dev = data->input_dev;
1153 mxt_write_object(data, MXT_GEN_COMMAND,
1154 MXT_COMMAND_RESET, 1);
1156 msleep(MXT_RESET_TIME);
1158 mutex_lock(&input_dev->mutex);
1160 if (input_dev->users)
1163 mutex_unlock(&input_dev->mutex);
1168 static const struct dev_pm_ops mxt_pm_ops = {
1169 .suspend = mxt_suspend,
1170 .resume = mxt_resume,
1174 static const struct i2c_device_id mxt_id[] = {
1175 { "qt602240_ts", 0 },
1176 { "atmel_mxt_ts", 0 },
1180 MODULE_DEVICE_TABLE(i2c, mxt_id);
1182 static struct i2c_driver mxt_driver = {
1184 .name = "atmel_mxt_ts",
1185 .owner = THIS_MODULE,
1191 .remove = __devexit_p(mxt_remove),
1195 static int __init mxt_init(void)
1197 return i2c_add_driver(&mxt_driver);
1200 static void __exit mxt_exit(void)
1202 i2c_del_driver(&mxt_driver);
1205 module_init(mxt_init);
1206 module_exit(mxt_exit);
1208 /* Module information */
1209 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
1210 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
1211 MODULE_LICENSE("GPL");