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/delay.h>
16 #include <linux/firmware.h>
17 #include <linux/i2c.h>
18 #include <linux/i2c/atmel_mxt_ts.h>
19 #include <linux/input/mt.h>
20 #include <linux/interrupt.h>
21 #include <linux/slab.h>
29 #define MXT_APP_LOW 0x4a
30 #define MXT_APP_HIGH 0x4b
31 #define MXT_BOOT_LOW 0x24
32 #define MXT_BOOT_HIGH 0x25
35 #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 50 /* msec */
179 #define MXT_RESET_TIME 200 /* 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_UNGRIP (1 << 0)
198 #define MXT_SUPPRESS (1 << 1)
199 #define MXT_AMP (1 << 2)
200 #define MXT_VECTOR (1 << 3)
201 #define MXT_MOVE (1 << 4)
202 #define MXT_RELEASE (1 << 5)
203 #define MXT_PRESS (1 << 6)
204 #define MXT_DETECT (1 << 7)
206 /* Touch orient bits */
207 #define MXT_XY_SWITCH (1 << 0)
208 #define MXT_X_INVERT (1 << 1)
209 #define MXT_Y_INVERT (1 << 2)
211 /* Touchscreen absolute values */
212 #define MXT_MAX_AREA 0xff
214 #define MXT_PIXELS_PER_MM 20
229 u8 size; /* Size of each instance - 1 */
230 u8 instances; /* Number of instances - 1 */
239 /* Each client has this additional data */
241 struct i2c_client *client;
242 struct input_dev *input_dev;
243 char phys[64]; /* device physical location */
244 const struct mxt_platform_data *pdata;
245 struct mxt_object *object_table;
246 struct mxt_info info;
252 /* Cached parameters from object table */
259 static bool mxt_object_readable(unsigned int type)
262 case MXT_GEN_COMMAND_T6:
263 case MXT_GEN_POWER_T7:
264 case MXT_GEN_ACQUIRE_T8:
265 case MXT_GEN_DATASOURCE_T53:
266 case MXT_TOUCH_MULTI_T9:
267 case MXT_TOUCH_KEYARRAY_T15:
268 case MXT_TOUCH_PROXIMITY_T23:
269 case MXT_TOUCH_PROXKEY_T52:
270 case MXT_PROCI_GRIPFACE_T20:
271 case MXT_PROCG_NOISE_T22:
272 case MXT_PROCI_ONETOUCH_T24:
273 case MXT_PROCI_TWOTOUCH_T27:
274 case MXT_PROCI_GRIP_T40:
275 case MXT_PROCI_PALM_T41:
276 case MXT_PROCI_TOUCHSUPPRESSION_T42:
277 case MXT_PROCI_STYLUS_T47:
278 case MXT_PROCG_NOISESUPPRESSION_T48:
279 case MXT_SPT_COMMSCONFIG_T18:
280 case MXT_SPT_GPIOPWM_T19:
281 case MXT_SPT_SELFTEST_T25:
282 case MXT_SPT_CTECONFIG_T28:
283 case MXT_SPT_USERDATA_T38:
284 case MXT_SPT_DIGITIZER_T43:
285 case MXT_SPT_CTECONFIG_T46:
292 static bool mxt_object_writable(unsigned int type)
295 case MXT_GEN_COMMAND_T6:
296 case MXT_GEN_POWER_T7:
297 case MXT_GEN_ACQUIRE_T8:
298 case MXT_TOUCH_MULTI_T9:
299 case MXT_TOUCH_KEYARRAY_T15:
300 case MXT_TOUCH_PROXIMITY_T23:
301 case MXT_TOUCH_PROXKEY_T52:
302 case MXT_PROCI_GRIPFACE_T20:
303 case MXT_PROCG_NOISE_T22:
304 case MXT_PROCI_ONETOUCH_T24:
305 case MXT_PROCI_TWOTOUCH_T27:
306 case MXT_PROCI_GRIP_T40:
307 case MXT_PROCI_PALM_T41:
308 case MXT_PROCI_TOUCHSUPPRESSION_T42:
309 case MXT_PROCI_STYLUS_T47:
310 case MXT_PROCG_NOISESUPPRESSION_T48:
311 case MXT_SPT_COMMSCONFIG_T18:
312 case MXT_SPT_GPIOPWM_T19:
313 case MXT_SPT_SELFTEST_T25:
314 case MXT_SPT_CTECONFIG_T28:
315 case MXT_SPT_DIGITIZER_T43:
316 case MXT_SPT_CTECONFIG_T46:
323 static void mxt_dump_message(struct device *dev,
324 struct mxt_message *message)
326 dev_dbg(dev, "reportid: %u\tmessage: %*ph\n",
327 message->reportid, 7, message->message);
330 static int mxt_check_bootloader(struct i2c_client *client,
336 if (i2c_master_recv(client, &val, 1) != 1) {
337 dev_err(&client->dev, "%s: i2c recv failed\n", __func__);
342 case MXT_WAITING_BOOTLOAD_CMD:
343 case MXT_WAITING_FRAME_DATA:
344 val &= ~MXT_BOOT_STATUS_MASK;
346 case MXT_FRAME_CRC_PASS:
347 if (val == MXT_FRAME_CRC_CHECK)
355 dev_err(&client->dev, "Unvalid bootloader mode state\n");
362 static int mxt_unlock_bootloader(struct i2c_client *client)
366 buf[0] = MXT_UNLOCK_CMD_LSB;
367 buf[1] = MXT_UNLOCK_CMD_MSB;
369 if (i2c_master_send(client, buf, 2) != 2) {
370 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
377 static int mxt_fw_write(struct i2c_client *client,
378 const u8 *data, unsigned int frame_size)
380 if (i2c_master_send(client, data, frame_size) != frame_size) {
381 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
388 static int __mxt_read_reg(struct i2c_client *client,
389 u16 reg, u16 len, void *val)
391 struct i2c_msg xfer[2];
396 buf[1] = (reg >> 8) & 0xff;
399 xfer[0].addr = client->addr;
405 xfer[1].addr = client->addr;
406 xfer[1].flags = I2C_M_RD;
410 ret = i2c_transfer(client->adapter, xfer, 2);
416 dev_err(&client->dev, "%s: i2c transfer failed (%d)\n",
423 static int mxt_read_reg(struct i2c_client *client, u16 reg, u8 *val)
425 return __mxt_read_reg(client, reg, 1, val);
428 static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
436 buf = kmalloc(count, GFP_KERNEL);
441 buf[1] = (reg >> 8) & 0xff;
442 memcpy(&buf[2], val, len);
444 ret = i2c_master_send(client, buf, count);
450 dev_err(&client->dev, "%s: i2c send failed (%d)\n",
458 static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
460 return __mxt_write_reg(client, reg, 1, &val);
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_button(struct mxt_data *data, struct mxt_message *message)
510 struct input_dev *input = data->input_dev;
511 const struct mxt_platform_data *pdata = data->pdata;
515 /* Active-low switch */
516 for (i = 0; i < pdata->t19_num_keys; i++) {
517 if (pdata->t19_keymap[i] == KEY_RESERVED)
519 button = !(message->message[0] & (1 << i));
520 input_report_key(input, pdata->t19_keymap[i], button);
524 static void mxt_input_touchevent(struct mxt_data *data,
525 struct mxt_message *message, int id)
527 struct device *dev = &data->client->dev;
528 u8 status = message->message[0];
529 struct input_dev *input_dev = data->input_dev;
535 x = (message->message[1] << 4) | ((message->message[3] >> 4) & 0xf);
536 y = (message->message[2] << 4) | ((message->message[3] & 0xf));
537 if (data->max_x < 1024)
539 if (data->max_y < 1024)
542 area = message->message[4];
543 pressure = message->message[5];
546 "[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u\n",
548 (status & MXT_DETECT) ? 'D' : '.',
549 (status & MXT_PRESS) ? 'P' : '.',
550 (status & MXT_RELEASE) ? 'R' : '.',
551 (status & MXT_MOVE) ? 'M' : '.',
552 (status & MXT_VECTOR) ? 'V' : '.',
553 (status & MXT_AMP) ? 'A' : '.',
554 (status & MXT_SUPPRESS) ? 'S' : '.',
555 (status & MXT_UNGRIP) ? 'U' : '.',
556 x, y, area, pressure);
558 input_mt_slot(input_dev, id);
559 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER,
560 status & MXT_DETECT);
562 if (status & MXT_DETECT) {
563 input_report_abs(input_dev, ABS_MT_POSITION_X, x);
564 input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
565 input_report_abs(input_dev, ABS_MT_PRESSURE, pressure);
566 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area);
570 static unsigned mxt_extract_T6_csum(const u8 *csum)
572 return csum[0] | (csum[1] << 8) | (csum[2] << 16);
575 static bool mxt_is_T9_message(struct mxt_data *data, struct mxt_message *msg)
577 u8 id = msg->reportid;
578 return (id >= data->T9_reportid_min && id <= data->T9_reportid_max);
581 static irqreturn_t mxt_interrupt(int irq, void *dev_id)
583 struct mxt_data *data = dev_id;
584 struct mxt_message message;
585 const u8 *payload = &message.message[0];
586 struct device *dev = &data->client->dev;
588 bool update_input = false;
591 if (mxt_read_message(data, &message)) {
592 dev_err(dev, "Failed to read message\n");
596 reportid = message.reportid;
598 if (reportid == data->T6_reportid) {
599 u8 status = payload[0];
600 unsigned csum = mxt_extract_T6_csum(&payload[1]);
601 dev_dbg(dev, "Status: %02x Config Checksum: %06x\n",
603 } else if (mxt_is_T9_message(data, &message)) {
604 int id = reportid - data->T9_reportid_min;
605 mxt_input_touchevent(data, &message, id);
607 } else if (message.reportid == data->T19_reportid) {
608 mxt_input_button(data, &message);
611 mxt_dump_message(dev, &message);
613 } while (reportid != 0xff);
616 input_mt_report_pointer_emulation(data->input_dev, false);
617 input_sync(data->input_dev);
624 static int mxt_check_reg_init(struct mxt_data *data)
626 const struct mxt_platform_data *pdata = data->pdata;
627 struct mxt_object *object;
628 struct device *dev = &data->client->dev;
633 if (!pdata->config) {
634 dev_dbg(dev, "No cfg data defined, skipping reg init\n");
638 for (i = 0; i < data->info.object_num; i++) {
639 object = data->object_table + i;
641 if (!mxt_object_writable(object->type))
644 size = (object->size + 1) * (object->instances + 1);
645 if (index + size > pdata->config_length) {
646 dev_err(dev, "Not enough config data!\n");
650 ret = __mxt_write_reg(data->client, object->start_address,
651 size, &pdata->config[index]);
660 static int mxt_make_highchg(struct mxt_data *data)
662 struct device *dev = &data->client->dev;
663 struct mxt_message message;
667 /* Read dummy message to make high CHG pin */
669 error = mxt_read_message(data, &message);
672 } while (message.reportid != 0xff && --count);
675 dev_err(dev, "CHG pin isn't cleared\n");
682 static int mxt_get_info(struct mxt_data *data)
684 struct i2c_client *client = data->client;
685 struct mxt_info *info = &data->info;
688 /* Read 7-byte info block starting at address 0 */
689 error = __mxt_read_reg(client, MXT_INFO, sizeof(*info), info);
696 static int mxt_get_object_table(struct mxt_data *data)
698 struct i2c_client *client = data->client;
704 table_size = data->info.object_num * sizeof(struct mxt_object);
705 error = __mxt_read_reg(client, MXT_OBJECT_START, table_size,
710 /* Valid Report IDs start counting from 1 */
712 for (i = 0; i < data->info.object_num; i++) {
713 struct mxt_object *object = data->object_table + i;
716 le16_to_cpus(&object->start_address);
718 if (object->num_report_ids) {
720 reportid += object->num_report_ids *
721 (object->instances + 1);
722 max_id = reportid - 1;
728 dev_dbg(&data->client->dev,
729 "Type %2d Start %3d Size %3d Instances %2d ReportIDs %3u : %3u\n",
730 object->type, object->start_address, object->size + 1,
731 object->instances + 1, min_id, max_id);
733 switch (object->type) {
734 case MXT_GEN_COMMAND_T6:
735 data->T6_reportid = min_id;
737 case MXT_TOUCH_MULTI_T9:
738 data->T9_reportid_min = min_id;
739 data->T9_reportid_max = max_id;
741 case MXT_SPT_GPIOPWM_T19:
742 data->T19_reportid = min_id;
750 static void mxt_free_object_table(struct mxt_data *data)
752 kfree(data->object_table);
753 data->object_table = NULL;
754 data->T6_reportid = 0;
755 data->T9_reportid_min = 0;
756 data->T9_reportid_max = 0;
757 data->T19_reportid = 0;
760 static int mxt_initialize(struct mxt_data *data)
762 struct i2c_client *client = data->client;
763 struct mxt_info *info = &data->info;
767 error = mxt_get_info(data);
771 data->object_table = kcalloc(info->object_num,
772 sizeof(struct mxt_object),
774 if (!data->object_table) {
775 dev_err(&client->dev, "Failed to allocate memory\n");
779 /* Get object table information */
780 error = mxt_get_object_table(data);
782 goto err_free_object_table;
784 /* Check register init values */
785 error = mxt_check_reg_init(data);
787 goto err_free_object_table;
789 /* Backup to memory */
790 mxt_write_object(data, MXT_GEN_COMMAND_T6,
791 MXT_COMMAND_BACKUPNV,
793 msleep(MXT_BACKUP_TIME);
796 mxt_write_object(data, MXT_GEN_COMMAND_T6,
797 MXT_COMMAND_RESET, 1);
798 msleep(MXT_RESET_TIME);
800 /* Update matrix size at info struct */
801 error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, &val);
803 goto err_free_object_table;
804 info->matrix_xsize = val;
806 error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, &val);
808 goto err_free_object_table;
809 info->matrix_ysize = val;
811 dev_info(&client->dev,
812 "Family ID: %u Variant ID: %u Major.Minor.Build: %u.%u.%02X\n",
813 info->family_id, info->variant_id, info->version >> 4,
814 info->version & 0xf, info->build);
816 dev_info(&client->dev,
817 "Matrix X Size: %u Matrix Y Size: %u Object Num: %u\n",
818 info->matrix_xsize, info->matrix_ysize,
823 err_free_object_table:
824 mxt_free_object_table(data);
828 static void mxt_calc_resolution(struct mxt_data *data)
830 unsigned int max_x = data->pdata->x_size - 1;
831 unsigned int max_y = data->pdata->y_size - 1;
833 if (data->pdata->orient & MXT_XY_SWITCH) {
842 /* Firmware Version is returned as Major.Minor.Build */
843 static ssize_t mxt_fw_version_show(struct device *dev,
844 struct device_attribute *attr, char *buf)
846 struct mxt_data *data = dev_get_drvdata(dev);
847 struct mxt_info *info = &data->info;
848 return scnprintf(buf, PAGE_SIZE, "%u.%u.%02X\n",
849 info->version >> 4, info->version & 0xf, info->build);
852 /* Hardware Version is returned as FamilyID.VariantID */
853 static ssize_t mxt_hw_version_show(struct device *dev,
854 struct device_attribute *attr, char *buf)
856 struct mxt_data *data = dev_get_drvdata(dev);
857 struct mxt_info *info = &data->info;
858 return scnprintf(buf, PAGE_SIZE, "%u.%u\n",
859 info->family_id, info->variant_id);
862 static ssize_t mxt_show_instance(char *buf, int count,
863 struct mxt_object *object, int instance,
868 if (object->instances > 0)
869 count += scnprintf(buf + count, PAGE_SIZE - count,
870 "Instance %u\n", instance);
872 for (i = 0; i < object->size + 1; i++)
873 count += scnprintf(buf + count, PAGE_SIZE - count,
874 "\t[%2u]: %02x (%d)\n", i, val[i], val[i]);
875 count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
880 static ssize_t mxt_object_show(struct device *dev,
881 struct device_attribute *attr, char *buf)
883 struct mxt_data *data = dev_get_drvdata(dev);
884 struct mxt_object *object;
890 /* Pre-allocate buffer large enough to hold max sized object. */
891 obuf = kmalloc(256, GFP_KERNEL);
896 for (i = 0; i < data->info.object_num; i++) {
897 object = data->object_table + i;
899 if (!mxt_object_readable(object->type))
902 count += scnprintf(buf + count, PAGE_SIZE - count,
903 "T%u:\n", object->type);
905 for (j = 0; j < object->instances + 1; j++) {
906 u16 size = object->size + 1;
907 u16 addr = object->start_address + j * size;
909 error = __mxt_read_reg(data->client, addr, size, obuf);
913 count = mxt_show_instance(buf, count, object, j, obuf);
919 return error ?: count;
922 static int mxt_load_fw(struct device *dev, const char *fn)
924 struct mxt_data *data = dev_get_drvdata(dev);
925 struct i2c_client *client = data->client;
926 const struct firmware *fw = NULL;
927 unsigned int frame_size;
928 unsigned int pos = 0;
931 ret = request_firmware(&fw, fn, dev);
933 dev_err(dev, "Unable to open firmware %s\n", fn);
937 /* Change to the bootloader mode */
938 mxt_write_object(data, MXT_GEN_COMMAND_T6,
939 MXT_COMMAND_RESET, MXT_BOOT_VALUE);
940 msleep(MXT_RESET_TIME);
942 /* Change to slave address of bootloader */
943 if (client->addr == MXT_APP_LOW)
944 client->addr = MXT_BOOT_LOW;
946 client->addr = MXT_BOOT_HIGH;
948 ret = mxt_check_bootloader(client, MXT_WAITING_BOOTLOAD_CMD);
952 /* Unlock bootloader */
953 mxt_unlock_bootloader(client);
955 while (pos < fw->size) {
956 ret = mxt_check_bootloader(client,
957 MXT_WAITING_FRAME_DATA);
961 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
963 /* We should add 2 at frame size as the the firmware data is not
964 * included the CRC bytes.
968 /* Write one frame to device */
969 mxt_fw_write(client, fw->data + pos, frame_size);
971 ret = mxt_check_bootloader(client,
978 dev_dbg(dev, "Updated %d bytes / %zd bytes\n", pos, fw->size);
982 release_firmware(fw);
984 /* Change to slave address of application */
985 if (client->addr == MXT_BOOT_LOW)
986 client->addr = MXT_APP_LOW;
988 client->addr = MXT_APP_HIGH;
993 static ssize_t mxt_update_fw_store(struct device *dev,
994 struct device_attribute *attr,
995 const char *buf, size_t count)
997 struct mxt_data *data = dev_get_drvdata(dev);
1000 disable_irq(data->irq);
1002 error = mxt_load_fw(dev, MXT_FW_NAME);
1004 dev_err(dev, "The firmware update failed(%d)\n", error);
1007 dev_dbg(dev, "The firmware update succeeded\n");
1009 /* Wait for reset */
1010 msleep(MXT_FWRESET_TIME);
1012 mxt_free_object_table(data);
1014 mxt_initialize(data);
1017 enable_irq(data->irq);
1019 error = mxt_make_highchg(data);
1026 static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL);
1027 static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL);
1028 static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
1029 static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
1031 static struct attribute *mxt_attrs[] = {
1032 &dev_attr_fw_version.attr,
1033 &dev_attr_hw_version.attr,
1034 &dev_attr_object.attr,
1035 &dev_attr_update_fw.attr,
1039 static const struct attribute_group mxt_attr_group = {
1043 static void mxt_start(struct mxt_data *data)
1046 mxt_write_object(data,
1047 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0x83);
1050 static void mxt_stop(struct mxt_data *data)
1053 mxt_write_object(data,
1054 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0);
1057 static int mxt_input_open(struct input_dev *dev)
1059 struct mxt_data *data = input_get_drvdata(dev);
1066 static void mxt_input_close(struct input_dev *dev)
1068 struct mxt_data *data = input_get_drvdata(dev);
1073 static int mxt_probe(struct i2c_client *client,
1074 const struct i2c_device_id *id)
1076 const struct mxt_platform_data *pdata = dev_get_platdata(&client->dev);
1077 struct mxt_data *data;
1078 struct input_dev *input_dev;
1080 unsigned int num_mt_slots;
1081 unsigned int mt_flags = 0;
1087 data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
1088 input_dev = input_allocate_device();
1089 if (!data || !input_dev) {
1090 dev_err(&client->dev, "Failed to allocate memory\n");
1095 input_dev->name = "Atmel maXTouch Touchscreen";
1096 snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
1097 client->adapter->nr, client->addr);
1099 input_dev->phys = data->phys;
1101 input_dev->id.bustype = BUS_I2C;
1102 input_dev->dev.parent = &client->dev;
1103 input_dev->open = mxt_input_open;
1104 input_dev->close = mxt_input_close;
1106 data->client = client;
1107 data->input_dev = input_dev;
1108 data->pdata = pdata;
1109 data->irq = client->irq;
1111 mxt_calc_resolution(data);
1113 error = mxt_initialize(data);
1117 __set_bit(EV_ABS, input_dev->evbit);
1118 __set_bit(EV_KEY, input_dev->evbit);
1119 __set_bit(BTN_TOUCH, input_dev->keybit);
1121 if (pdata->t19_num_keys) {
1122 __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
1124 for (i = 0; i < pdata->t19_num_keys; i++)
1125 if (pdata->t19_keymap[i] != KEY_RESERVED)
1126 input_set_capability(input_dev, EV_KEY,
1127 pdata->t19_keymap[i]);
1129 mt_flags |= INPUT_MT_POINTER;
1131 input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM);
1132 input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM);
1133 input_abs_set_res(input_dev, ABS_MT_POSITION_X,
1135 input_abs_set_res(input_dev, ABS_MT_POSITION_Y,
1138 input_dev->name = "Atmel maXTouch Touchpad";
1141 /* For single touch */
1142 input_set_abs_params(input_dev, ABS_X,
1143 0, data->max_x, 0, 0);
1144 input_set_abs_params(input_dev, ABS_Y,
1145 0, data->max_y, 0, 0);
1146 input_set_abs_params(input_dev, ABS_PRESSURE,
1149 /* For multi touch */
1150 num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
1151 error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags);
1153 goto err_free_object;
1154 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
1155 0, MXT_MAX_AREA, 0, 0);
1156 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
1157 0, data->max_x, 0, 0);
1158 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
1159 0, data->max_y, 0, 0);
1160 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
1163 input_set_drvdata(input_dev, data);
1164 i2c_set_clientdata(client, data);
1166 error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
1167 pdata->irqflags | IRQF_ONESHOT,
1168 client->name, data);
1170 dev_err(&client->dev, "Failed to register interrupt\n");
1171 goto err_free_object;
1174 error = mxt_make_highchg(data);
1178 error = input_register_device(input_dev);
1182 error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
1184 goto err_unregister_device;
1188 err_unregister_device:
1189 input_unregister_device(input_dev);
1192 free_irq(client->irq, data);
1194 kfree(data->object_table);
1196 input_free_device(input_dev);
1201 static int mxt_remove(struct i2c_client *client)
1203 struct mxt_data *data = i2c_get_clientdata(client);
1205 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
1206 free_irq(data->irq, data);
1207 input_unregister_device(data->input_dev);
1208 kfree(data->object_table);
1214 #ifdef CONFIG_PM_SLEEP
1215 static int mxt_suspend(struct device *dev)
1217 struct i2c_client *client = to_i2c_client(dev);
1218 struct mxt_data *data = i2c_get_clientdata(client);
1219 struct input_dev *input_dev = data->input_dev;
1221 mutex_lock(&input_dev->mutex);
1223 if (input_dev->users)
1226 mutex_unlock(&input_dev->mutex);
1231 static int mxt_resume(struct device *dev)
1233 struct i2c_client *client = to_i2c_client(dev);
1234 struct mxt_data *data = i2c_get_clientdata(client);
1235 struct input_dev *input_dev = data->input_dev;
1238 mxt_write_object(data, MXT_GEN_COMMAND_T6,
1239 MXT_COMMAND_RESET, 1);
1241 msleep(MXT_RESET_TIME);
1243 mutex_lock(&input_dev->mutex);
1245 if (input_dev->users)
1248 mutex_unlock(&input_dev->mutex);
1254 static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
1256 static const struct i2c_device_id mxt_id[] = {
1257 { "qt602240_ts", 0 },
1258 { "atmel_mxt_ts", 0 },
1259 { "atmel_mxt_tp", 0 },
1263 MODULE_DEVICE_TABLE(i2c, mxt_id);
1265 static struct i2c_driver mxt_driver = {
1267 .name = "atmel_mxt_ts",
1268 .owner = THIS_MODULE,
1272 .remove = mxt_remove,
1276 module_i2c_driver(mxt_driver);
1278 /* Module information */
1279 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
1280 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
1281 MODULE_LICENSE("GPL");