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 /* Touch orient bits */
200 #define MXT_XY_SWITCH (1 << 0)
201 #define MXT_X_INVERT (1 << 1)
202 #define MXT_Y_INVERT (1 << 2)
204 /* Touchscreen absolute values */
205 #define MXT_MAX_AREA 0xff
207 #define MXT_MAX_FINGER 10
226 /* to map object and message */
243 /* Each client has this additional data */
245 struct i2c_client *client;
246 struct input_dev *input_dev;
247 const struct mxt_platform_data *pdata;
248 struct mxt_object *object_table;
249 struct mxt_info info;
250 struct mxt_finger finger[MXT_MAX_FINGER];
256 static bool mxt_object_readable(unsigned int type)
259 case MXT_GEN_MESSAGE:
260 case MXT_GEN_COMMAND:
262 case MXT_GEN_ACQUIRE:
263 case MXT_TOUCH_MULTI:
264 case MXT_TOUCH_KEYARRAY:
265 case MXT_TOUCH_PROXIMITY:
266 case MXT_PROCI_GRIPFACE:
267 case MXT_PROCG_NOISE:
268 case MXT_PROCI_ONETOUCH:
269 case MXT_PROCI_TWOTOUCH:
272 case MXT_SPT_COMMSCONFIG:
273 case MXT_SPT_GPIOPWM:
274 case MXT_SPT_SELFTEST:
275 case MXT_SPT_CTECONFIG:
276 case MXT_SPT_USERDATA:
283 static bool mxt_object_writable(unsigned int type)
286 case MXT_GEN_COMMAND:
288 case MXT_GEN_ACQUIRE:
289 case MXT_TOUCH_MULTI:
290 case MXT_TOUCH_KEYARRAY:
291 case MXT_TOUCH_PROXIMITY:
292 case MXT_PROCI_GRIPFACE:
293 case MXT_PROCG_NOISE:
294 case MXT_PROCI_ONETOUCH:
295 case MXT_PROCI_TWOTOUCH:
298 case MXT_SPT_GPIOPWM:
299 case MXT_SPT_SELFTEST:
300 case MXT_SPT_CTECONFIG:
307 static void mxt_dump_message(struct device *dev,
308 struct mxt_message *message)
310 dev_dbg(dev, "reportid:\t0x%x\n", message->reportid);
311 dev_dbg(dev, "message1:\t0x%x\n", message->message[0]);
312 dev_dbg(dev, "message2:\t0x%x\n", message->message[1]);
313 dev_dbg(dev, "message3:\t0x%x\n", message->message[2]);
314 dev_dbg(dev, "message4:\t0x%x\n", message->message[3]);
315 dev_dbg(dev, "message5:\t0x%x\n", message->message[4]);
316 dev_dbg(dev, "message6:\t0x%x\n", message->message[5]);
317 dev_dbg(dev, "message7:\t0x%x\n", message->message[6]);
318 dev_dbg(dev, "checksum:\t0x%x\n", message->checksum);
321 static int mxt_check_bootloader(struct i2c_client *client,
327 if (i2c_master_recv(client, &val, 1) != 1) {
328 dev_err(&client->dev, "%s: i2c recv failed\n", __func__);
333 case MXT_WAITING_BOOTLOAD_CMD:
334 case MXT_WAITING_FRAME_DATA:
335 val &= ~MXT_BOOT_STATUS_MASK;
337 case MXT_FRAME_CRC_PASS:
338 if (val == MXT_FRAME_CRC_CHECK)
346 dev_err(&client->dev, "Unvalid bootloader mode state\n");
353 static int mxt_unlock_bootloader(struct i2c_client *client)
357 buf[0] = MXT_UNLOCK_CMD_LSB;
358 buf[1] = MXT_UNLOCK_CMD_MSB;
360 if (i2c_master_send(client, buf, 2) != 2) {
361 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
368 static int mxt_fw_write(struct i2c_client *client,
369 const u8 *data, unsigned int frame_size)
371 if (i2c_master_send(client, data, frame_size) != frame_size) {
372 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
379 static int __mxt_read_reg(struct i2c_client *client,
380 u16 reg, u16 len, void *val)
382 struct i2c_msg xfer[2];
386 buf[1] = (reg >> 8) & 0xff;
389 xfer[0].addr = client->addr;
395 xfer[1].addr = client->addr;
396 xfer[1].flags = I2C_M_RD;
400 if (i2c_transfer(client->adapter, xfer, 2) != 2) {
401 dev_err(&client->dev, "%s: i2c transfer failed\n", __func__);
408 static int mxt_read_reg(struct i2c_client *client, u16 reg, u8 *val)
410 return __mxt_read_reg(client, reg, 1, val);
413 static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
418 buf[1] = (reg >> 8) & 0xff;
421 if (i2c_master_send(client, buf, 3) != 3) {
422 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
429 static int mxt_read_object_table(struct i2c_client *client,
430 u16 reg, u8 *object_buf)
432 return __mxt_read_reg(client, reg, MXT_OBJECT_SIZE,
436 static struct mxt_object *
437 mxt_get_object(struct mxt_data *data, u8 type)
439 struct mxt_object *object;
442 for (i = 0; i < data->info.object_num; i++) {
443 object = data->object_table + i;
444 if (object->type == type)
448 dev_err(&data->client->dev, "Invalid object type\n");
452 static int mxt_read_message(struct mxt_data *data,
453 struct mxt_message *message)
455 struct mxt_object *object;
458 object = mxt_get_object(data, MXT_GEN_MESSAGE);
462 reg = object->start_address;
463 return __mxt_read_reg(data->client, reg,
464 sizeof(struct mxt_message), message);
467 static int mxt_read_object(struct mxt_data *data,
468 u8 type, u8 offset, u8 *val)
470 struct mxt_object *object;
473 object = mxt_get_object(data, type);
477 reg = object->start_address;
478 return __mxt_read_reg(data->client, reg + offset, 1, val);
481 static int mxt_write_object(struct mxt_data *data,
482 u8 type, u8 offset, u8 val)
484 struct mxt_object *object;
487 object = mxt_get_object(data, type);
491 reg = object->start_address;
492 return mxt_write_reg(data->client, reg + offset, val);
495 static void mxt_input_report(struct mxt_data *data, int single_id)
497 struct mxt_finger *finger = data->finger;
498 struct input_dev *input_dev = data->input_dev;
499 int status = finger[single_id].status;
503 for (id = 0; id < MXT_MAX_FINGER; id++) {
504 if (!finger[id].status)
507 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR,
508 finger[id].status != MXT_RELEASE ?
509 finger[id].area : 0);
510 input_report_abs(input_dev, ABS_MT_POSITION_X,
512 input_report_abs(input_dev, ABS_MT_POSITION_Y,
514 input_mt_sync(input_dev);
516 if (finger[id].status == MXT_RELEASE)
517 finger[id].status = 0;
522 input_report_key(input_dev, BTN_TOUCH, finger_num > 0);
524 if (status != MXT_RELEASE) {
525 input_report_abs(input_dev, ABS_X, finger[single_id].x);
526 input_report_abs(input_dev, ABS_Y, finger[single_id].y);
529 input_sync(input_dev);
532 static void mxt_input_touchevent(struct mxt_data *data,
533 struct mxt_message *message, int id)
535 struct mxt_finger *finger = data->finger;
536 struct device *dev = &data->client->dev;
537 u8 status = message->message[0];
542 /* Check the touch is present on the screen */
543 if (!(status & MXT_DETECT)) {
544 if (status & MXT_RELEASE) {
545 dev_dbg(dev, "[%d] released\n", id);
547 finger[id].status = MXT_RELEASE;
548 mxt_input_report(data, id);
553 /* Check only AMP detection */
554 if (!(status & (MXT_PRESS | MXT_MOVE)))
557 x = (message->message[1] << 4) | ((message->message[3] >> 4) & 0xf);
558 y = (message->message[2] << 4) | ((message->message[3] & 0xf));
559 if (data->max_x < 1024)
561 if (data->max_y < 1024)
564 area = message->message[4];
566 dev_dbg(dev, "[%d] %s x: %d, y: %d, area: %d\n", id,
567 status & MXT_MOVE ? "moved" : "pressed",
570 finger[id].status = status & MXT_MOVE ?
571 MXT_MOVE : MXT_PRESS;
574 finger[id].area = area;
576 mxt_input_report(data, id);
579 static irqreturn_t mxt_interrupt(int irq, void *dev_id)
581 struct mxt_data *data = dev_id;
582 struct mxt_message message;
583 struct mxt_object *object;
584 struct device *dev = &data->client->dev;
591 if (mxt_read_message(data, &message)) {
592 dev_err(dev, "Failed to read message\n");
596 reportid = message.reportid;
598 /* whether reportid is thing of MXT_TOUCH_MULTI */
599 object = mxt_get_object(data, MXT_TOUCH_MULTI);
603 max_reportid = object->max_reportid;
604 min_reportid = max_reportid - object->num_report_ids + 1;
605 id = reportid - min_reportid;
607 if (reportid >= min_reportid && reportid <= max_reportid)
608 mxt_input_touchevent(data, &message, id);
610 mxt_dump_message(dev, &message);
611 } while (reportid != 0xff);
617 static int mxt_check_reg_init(struct mxt_data *data)
619 const struct mxt_platform_data *pdata = data->pdata;
620 struct mxt_object *object;
621 struct device *dev = &data->client->dev;
623 int i, j, config_offset;
625 if (!pdata->config) {
626 dev_dbg(dev, "No cfg data defined, skipping reg init\n");
630 for (i = 0; i < data->info.object_num; i++) {
631 object = data->object_table + i;
633 if (!mxt_object_writable(object->type))
636 for (j = 0; j < object->size + 1; j++) {
637 config_offset = index + j;
638 if (config_offset > pdata->config_length) {
639 dev_err(dev, "Not enough config data!\n");
642 mxt_write_object(data, object->type, j,
643 pdata->config[config_offset]);
645 index += object->size + 1;
651 static int mxt_make_highchg(struct mxt_data *data)
653 struct device *dev = &data->client->dev;
654 struct mxt_message message;
658 /* Read dummy message to make high CHG pin */
660 error = mxt_read_message(data, &message);
663 } while (message.reportid != 0xff && --count);
666 dev_err(dev, "CHG pin isn't cleared\n");
673 static void mxt_handle_pdata(struct mxt_data *data)
675 const struct mxt_platform_data *pdata = data->pdata;
678 /* Set touchscreen lines */
679 mxt_write_object(data, MXT_TOUCH_MULTI, MXT_TOUCH_XSIZE,
681 mxt_write_object(data, MXT_TOUCH_MULTI, MXT_TOUCH_YSIZE,
684 /* Set touchscreen orient */
685 mxt_write_object(data, MXT_TOUCH_MULTI, MXT_TOUCH_ORIENT,
688 /* Set touchscreen burst length */
689 mxt_write_object(data, MXT_TOUCH_MULTI,
690 MXT_TOUCH_BLEN, pdata->blen);
692 /* Set touchscreen threshold */
693 mxt_write_object(data, MXT_TOUCH_MULTI,
694 MXT_TOUCH_TCHTHR, pdata->threshold);
696 /* Set touchscreen resolution */
697 mxt_write_object(data, MXT_TOUCH_MULTI,
698 MXT_TOUCH_XRANGE_LSB, (pdata->x_size - 1) & 0xff);
699 mxt_write_object(data, MXT_TOUCH_MULTI,
700 MXT_TOUCH_XRANGE_MSB, (pdata->x_size - 1) >> 8);
701 mxt_write_object(data, MXT_TOUCH_MULTI,
702 MXT_TOUCH_YRANGE_LSB, (pdata->y_size - 1) & 0xff);
703 mxt_write_object(data, MXT_TOUCH_MULTI,
704 MXT_TOUCH_YRANGE_MSB, (pdata->y_size - 1) >> 8);
706 /* Set touchscreen voltage */
707 if (pdata->voltage) {
708 if (pdata->voltage < MXT_VOLTAGE_DEFAULT) {
709 voltage = (MXT_VOLTAGE_DEFAULT - pdata->voltage) /
711 voltage = 0xff - voltage + 1;
713 voltage = (pdata->voltage - MXT_VOLTAGE_DEFAULT) /
716 mxt_write_object(data, MXT_SPT_CTECONFIG,
717 MXT_CTE_VOLTAGE, voltage);
721 static int mxt_get_info(struct mxt_data *data)
723 struct i2c_client *client = data->client;
724 struct mxt_info *info = &data->info;
728 error = mxt_read_reg(client, MXT_FAMILY_ID, &val);
731 info->family_id = val;
733 error = mxt_read_reg(client, MXT_VARIANT_ID, &val);
736 info->variant_id = val;
738 error = mxt_read_reg(client, MXT_VERSION, &val);
743 error = mxt_read_reg(client, MXT_BUILD, &val);
748 error = mxt_read_reg(client, MXT_OBJECT_NUM, &val);
751 info->object_num = val;
756 static int mxt_get_object_table(struct mxt_data *data)
762 u8 buf[MXT_OBJECT_SIZE];
764 for (i = 0; i < data->info.object_num; i++) {
765 struct mxt_object *object = data->object_table + i;
767 reg = MXT_OBJECT_START + MXT_OBJECT_SIZE * i;
768 error = mxt_read_object_table(data->client, reg, buf);
772 object->type = buf[0];
773 object->start_address = (buf[2] << 8) | buf[1];
774 object->size = buf[3];
775 object->instances = buf[4];
776 object->num_report_ids = buf[5];
778 if (object->num_report_ids) {
779 reportid += object->num_report_ids *
780 (object->instances + 1);
781 object->max_reportid = reportid;
788 static int mxt_initialize(struct mxt_data *data)
790 struct i2c_client *client = data->client;
791 struct mxt_info *info = &data->info;
795 error = mxt_get_info(data);
799 data->object_table = kcalloc(info->object_num,
800 sizeof(struct mxt_object),
802 if (!data->object_table) {
803 dev_err(&client->dev, "Failed to allocate memory\n");
807 /* Get object table information */
808 error = mxt_get_object_table(data);
812 /* Check register init values */
813 error = mxt_check_reg_init(data);
817 mxt_handle_pdata(data);
819 /* Backup to memory */
820 mxt_write_object(data, MXT_GEN_COMMAND,
821 MXT_COMMAND_BACKUPNV,
823 msleep(MXT_BACKUP_TIME);
826 mxt_write_object(data, MXT_GEN_COMMAND,
827 MXT_COMMAND_RESET, 1);
828 msleep(MXT_RESET_TIME);
830 /* Update matrix size at info struct */
831 error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, &val);
834 info->matrix_xsize = val;
836 error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, &val);
839 info->matrix_ysize = val;
841 dev_info(&client->dev,
842 "Family ID: %d Variant ID: %d Version: %d Build: %d\n",
843 info->family_id, info->variant_id, info->version,
846 dev_info(&client->dev,
847 "Matrix X Size: %d Matrix Y Size: %d Object Num: %d\n",
848 info->matrix_xsize, info->matrix_ysize,
854 static void mxt_calc_resolution(struct mxt_data *data)
856 unsigned int max_x = data->pdata->x_size - 1;
857 unsigned int max_y = data->pdata->y_size - 1;
859 if (data->pdata->orient & MXT_XY_SWITCH) {
868 static ssize_t mxt_object_show(struct device *dev,
869 struct device_attribute *attr, char *buf)
871 struct mxt_data *data = dev_get_drvdata(dev);
872 struct mxt_object *object;
878 for (i = 0; i < data->info.object_num; i++) {
879 object = data->object_table + i;
881 count += sprintf(buf + count,
882 "Object Table Element %d(Type %d)\n",
883 i + 1, object->type);
885 if (!mxt_object_readable(object->type)) {
886 count += sprintf(buf + count, "\n");
890 for (j = 0; j < object->size + 1; j++) {
891 error = mxt_read_object(data,
892 object->type, j, &val);
896 count += sprintf(buf + count,
897 " Byte %d: 0x%x (%d)\n", j, val, val);
900 count += sprintf(buf + count, "\n");
906 static int mxt_load_fw(struct device *dev, const char *fn)
908 struct mxt_data *data = dev_get_drvdata(dev);
909 struct i2c_client *client = data->client;
910 const struct firmware *fw = NULL;
911 unsigned int frame_size;
912 unsigned int pos = 0;
915 ret = request_firmware(&fw, fn, dev);
917 dev_err(dev, "Unable to open firmware %s\n", fn);
921 /* Change to the bootloader mode */
922 mxt_write_object(data, MXT_GEN_COMMAND,
923 MXT_COMMAND_RESET, MXT_BOOT_VALUE);
924 msleep(MXT_RESET_TIME);
926 /* Change to slave address of bootloader */
927 if (client->addr == MXT_APP_LOW)
928 client->addr = MXT_BOOT_LOW;
930 client->addr = MXT_BOOT_HIGH;
932 ret = mxt_check_bootloader(client, MXT_WAITING_BOOTLOAD_CMD);
936 /* Unlock bootloader */
937 mxt_unlock_bootloader(client);
939 while (pos < fw->size) {
940 ret = mxt_check_bootloader(client,
941 MXT_WAITING_FRAME_DATA);
945 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
947 /* We should add 2 at frame size as the the firmware data is not
948 * included the CRC bytes.
952 /* Write one frame to device */
953 mxt_fw_write(client, fw->data + pos, frame_size);
955 ret = mxt_check_bootloader(client,
962 dev_dbg(dev, "Updated %d bytes / %zd bytes\n", pos, fw->size);
966 release_firmware(fw);
968 /* Change to slave address of application */
969 if (client->addr == MXT_BOOT_LOW)
970 client->addr = MXT_APP_LOW;
972 client->addr = MXT_APP_HIGH;
977 static ssize_t mxt_update_fw_store(struct device *dev,
978 struct device_attribute *attr,
979 const char *buf, size_t count)
981 struct mxt_data *data = dev_get_drvdata(dev);
984 disable_irq(data->irq);
986 error = mxt_load_fw(dev, MXT_FW_NAME);
988 dev_err(dev, "The firmware update failed(%d)\n", error);
991 dev_dbg(dev, "The firmware update succeeded\n");
994 msleep(MXT_FWRESET_TIME);
996 kfree(data->object_table);
997 data->object_table = NULL;
999 mxt_initialize(data);
1002 enable_irq(data->irq);
1004 error = mxt_make_highchg(data);
1011 static DEVICE_ATTR(object, 0444, mxt_object_show, NULL);
1012 static DEVICE_ATTR(update_fw, 0664, NULL, mxt_update_fw_store);
1014 static struct attribute *mxt_attrs[] = {
1015 &dev_attr_object.attr,
1016 &dev_attr_update_fw.attr,
1020 static const struct attribute_group mxt_attr_group = {
1024 static void mxt_start(struct mxt_data *data)
1027 mxt_write_object(data,
1028 MXT_TOUCH_MULTI, MXT_TOUCH_CTRL, 0x83);
1031 static void mxt_stop(struct mxt_data *data)
1034 mxt_write_object(data,
1035 MXT_TOUCH_MULTI, MXT_TOUCH_CTRL, 0);
1038 static int mxt_input_open(struct input_dev *dev)
1040 struct mxt_data *data = input_get_drvdata(dev);
1047 static void mxt_input_close(struct input_dev *dev)
1049 struct mxt_data *data = input_get_drvdata(dev);
1054 static int __devinit mxt_probe(struct i2c_client *client,
1055 const struct i2c_device_id *id)
1057 const struct mxt_platform_data *pdata = client->dev.platform_data;
1058 struct mxt_data *data;
1059 struct input_dev *input_dev;
1065 data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
1066 input_dev = input_allocate_device();
1067 if (!data || !input_dev) {
1068 dev_err(&client->dev, "Failed to allocate memory\n");
1073 input_dev->name = "Atmel maXTouch Touchscreen";
1074 input_dev->id.bustype = BUS_I2C;
1075 input_dev->dev.parent = &client->dev;
1076 input_dev->open = mxt_input_open;
1077 input_dev->close = mxt_input_close;
1079 data->client = client;
1080 data->input_dev = input_dev;
1081 data->pdata = pdata;
1082 data->irq = client->irq;
1084 mxt_calc_resolution(data);
1086 __set_bit(EV_ABS, input_dev->evbit);
1087 __set_bit(EV_KEY, input_dev->evbit);
1088 __set_bit(BTN_TOUCH, input_dev->keybit);
1090 /* For single touch */
1091 input_set_abs_params(input_dev, ABS_X,
1092 0, data->max_x, 0, 0);
1093 input_set_abs_params(input_dev, ABS_Y,
1094 0, data->max_y, 0, 0);
1096 /* For multi touch */
1097 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
1098 0, MXT_MAX_AREA, 0, 0);
1099 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
1100 0, data->max_x, 0, 0);
1101 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
1102 0, data->max_y, 0, 0);
1104 input_set_drvdata(input_dev, data);
1105 i2c_set_clientdata(client, data);
1107 error = mxt_initialize(data);
1109 goto err_free_object;
1111 error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
1112 pdata->irqflags, client->dev.driver->name, data);
1114 dev_err(&client->dev, "Failed to register interrupt\n");
1115 goto err_free_object;
1118 error = mxt_make_highchg(data);
1122 error = input_register_device(input_dev);
1126 error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
1128 goto err_unregister_device;
1132 err_unregister_device:
1133 input_unregister_device(input_dev);
1136 free_irq(client->irq, data);
1138 kfree(data->object_table);
1140 input_free_device(input_dev);
1145 static int __devexit mxt_remove(struct i2c_client *client)
1147 struct mxt_data *data = i2c_get_clientdata(client);
1149 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
1150 free_irq(data->irq, data);
1151 input_unregister_device(data->input_dev);
1152 kfree(data->object_table);
1159 static int mxt_suspend(struct device *dev)
1161 struct i2c_client *client = to_i2c_client(dev);
1162 struct mxt_data *data = i2c_get_clientdata(client);
1163 struct input_dev *input_dev = data->input_dev;
1165 mutex_lock(&input_dev->mutex);
1167 if (input_dev->users)
1170 mutex_unlock(&input_dev->mutex);
1175 static int mxt_resume(struct device *dev)
1177 struct i2c_client *client = to_i2c_client(dev);
1178 struct mxt_data *data = i2c_get_clientdata(client);
1179 struct input_dev *input_dev = data->input_dev;
1182 mxt_write_object(data, MXT_GEN_COMMAND,
1183 MXT_COMMAND_RESET, 1);
1185 msleep(MXT_RESET_TIME);
1187 mutex_lock(&input_dev->mutex);
1189 if (input_dev->users)
1192 mutex_unlock(&input_dev->mutex);
1197 static const struct dev_pm_ops mxt_pm_ops = {
1198 .suspend = mxt_suspend,
1199 .resume = mxt_resume,
1203 static const struct i2c_device_id mxt_id[] = {
1204 { "qt602240_ts", 0 },
1205 { "atmel_mxt_ts", 0 },
1209 MODULE_DEVICE_TABLE(i2c, mxt_id);
1211 static struct i2c_driver mxt_driver = {
1213 .name = "atmel_mxt_ts",
1214 .owner = THIS_MODULE,
1220 .remove = __devexit_p(mxt_remove),
1224 static int __init mxt_init(void)
1226 return i2c_add_driver(&mxt_driver);
1229 static void __exit mxt_exit(void)
1231 i2c_del_driver(&mxt_driver);
1234 module_init(mxt_init);
1235 module_exit(mxt_exit);
1237 /* Module information */
1238 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
1239 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
1240 MODULE_LICENSE("GPL");