2 * Atmel maXTouch Touchscreen driver
4 * Copyright (C) 2010 Samsung Electronics Co.Ltd
5 * Copyright (C) 2012 Google, Inc.
7 * Author: Joonyoung Shim <jy0922.shim@samsung.com>
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
16 #include <linux/module.h>
17 #include <linux/delay.h>
18 #include <linux/firmware.h>
19 #include <linux/i2c.h>
20 #include <linux/i2c/atmel_mxt_ts.h>
21 #include <linux/input/mt.h>
22 #include <linux/interrupt.h>
23 #include <linux/slab.h>
31 #define MXT_APP_LOW 0x4a
32 #define MXT_APP_HIGH 0x4b
33 #define MXT_BOOT_LOW 0x24
34 #define MXT_BOOT_HIGH 0x25
37 #define MXT_FW_NAME "maxtouch.fw"
41 #define MXT_FAMILY_ID 0x00
42 #define MXT_VARIANT_ID 0x01
43 #define MXT_VERSION 0x02
44 #define MXT_BUILD 0x03
45 #define MXT_MATRIX_X_SIZE 0x04
46 #define MXT_MATRIX_Y_SIZE 0x05
47 #define MXT_OBJECT_NUM 0x06
48 #define MXT_OBJECT_START 0x07
50 #define MXT_OBJECT_SIZE 6
53 #define MXT_DEBUG_DIAGNOSTIC_T37 37
54 #define MXT_GEN_MESSAGE_T5 5
55 #define MXT_GEN_COMMAND_T6 6
56 #define MXT_GEN_POWER_T7 7
57 #define MXT_GEN_ACQUIRE_T8 8
58 #define MXT_GEN_DATASOURCE_T53 53
59 #define MXT_TOUCH_MULTI_T9 9
60 #define MXT_TOUCH_KEYARRAY_T15 15
61 #define MXT_TOUCH_PROXIMITY_T23 23
62 #define MXT_TOUCH_PROXKEY_T52 52
63 #define MXT_PROCI_GRIPFACE_T20 20
64 #define MXT_PROCG_NOISE_T22 22
65 #define MXT_PROCI_ONETOUCH_T24 24
66 #define MXT_PROCI_TWOTOUCH_T27 27
67 #define MXT_PROCI_GRIP_T40 40
68 #define MXT_PROCI_PALM_T41 41
69 #define MXT_PROCI_TOUCHSUPPRESSION_T42 42
70 #define MXT_PROCI_STYLUS_T47 47
71 #define MXT_PROCG_NOISESUPPRESSION_T48 48
72 #define MXT_SPT_COMMSCONFIG_T18 18
73 #define MXT_SPT_GPIOPWM_T19 19
74 #define MXT_SPT_SELFTEST_T25 25
75 #define MXT_SPT_CTECONFIG_T28 28
76 #define MXT_SPT_USERDATA_T38 38
77 #define MXT_SPT_DIGITIZER_T43 43
78 #define MXT_SPT_MESSAGECOUNT_T44 44
79 #define MXT_SPT_CTECONFIG_T46 46
81 /* MXT_GEN_COMMAND_T6 field */
82 #define MXT_COMMAND_RESET 0
83 #define MXT_COMMAND_BACKUPNV 1
84 #define MXT_COMMAND_CALIBRATE 2
85 #define MXT_COMMAND_REPORTALL 3
86 #define MXT_COMMAND_DIAGNOSTIC 5
88 /* MXT_GEN_POWER_T7 field */
89 #define MXT_POWER_IDLEACQINT 0
90 #define MXT_POWER_ACTVACQINT 1
91 #define MXT_POWER_ACTV2IDLETO 2
93 /* MXT_GEN_ACQUIRE_T8 field */
94 #define MXT_ACQUIRE_CHRGTIME 0
95 #define MXT_ACQUIRE_TCHDRIFT 2
96 #define MXT_ACQUIRE_DRIFTST 3
97 #define MXT_ACQUIRE_TCHAUTOCAL 4
98 #define MXT_ACQUIRE_SYNC 5
99 #define MXT_ACQUIRE_ATCHCALST 6
100 #define MXT_ACQUIRE_ATCHCALSTHR 7
102 /* MXT_TOUCH_MULTI_T9 field */
103 #define MXT_TOUCH_CTRL 0
104 #define MXT_TOUCH_XORIGIN 1
105 #define MXT_TOUCH_YORIGIN 2
106 #define MXT_TOUCH_XSIZE 3
107 #define MXT_TOUCH_YSIZE 4
108 #define MXT_TOUCH_BLEN 6
109 #define MXT_TOUCH_TCHTHR 7
110 #define MXT_TOUCH_TCHDI 8
111 #define MXT_TOUCH_ORIENT 9
112 #define MXT_TOUCH_MOVHYSTI 11
113 #define MXT_TOUCH_MOVHYSTN 12
114 #define MXT_TOUCH_NUMTOUCH 14
115 #define MXT_TOUCH_MRGHYST 15
116 #define MXT_TOUCH_MRGTHR 16
117 #define MXT_TOUCH_AMPHYST 17
118 #define MXT_TOUCH_XRANGE_LSB 18
119 #define MXT_TOUCH_XRANGE_MSB 19
120 #define MXT_TOUCH_YRANGE_LSB 20
121 #define MXT_TOUCH_YRANGE_MSB 21
122 #define MXT_TOUCH_XLOCLIP 22
123 #define MXT_TOUCH_XHICLIP 23
124 #define MXT_TOUCH_YLOCLIP 24
125 #define MXT_TOUCH_YHICLIP 25
126 #define MXT_TOUCH_XEDGECTRL 26
127 #define MXT_TOUCH_XEDGEDIST 27
128 #define MXT_TOUCH_YEDGECTRL 28
129 #define MXT_TOUCH_YEDGEDIST 29
130 #define MXT_TOUCH_JUMPLIMIT 30
132 /* MXT_PROCI_GRIPFACE_T20 field */
133 #define MXT_GRIPFACE_CTRL 0
134 #define MXT_GRIPFACE_XLOGRIP 1
135 #define MXT_GRIPFACE_XHIGRIP 2
136 #define MXT_GRIPFACE_YLOGRIP 3
137 #define MXT_GRIPFACE_YHIGRIP 4
138 #define MXT_GRIPFACE_MAXTCHS 5
139 #define MXT_GRIPFACE_SZTHR1 7
140 #define MXT_GRIPFACE_SZTHR2 8
141 #define MXT_GRIPFACE_SHPTHR1 9
142 #define MXT_GRIPFACE_SHPTHR2 10
143 #define MXT_GRIPFACE_SUPEXTTO 11
145 /* MXT_PROCI_NOISE field */
146 #define MXT_NOISE_CTRL 0
147 #define MXT_NOISE_OUTFLEN 1
148 #define MXT_NOISE_GCAFUL_LSB 3
149 #define MXT_NOISE_GCAFUL_MSB 4
150 #define MXT_NOISE_GCAFLL_LSB 5
151 #define MXT_NOISE_GCAFLL_MSB 6
152 #define MXT_NOISE_ACTVGCAFVALID 7
153 #define MXT_NOISE_NOISETHR 8
154 #define MXT_NOISE_FREQHOPSCALE 10
155 #define MXT_NOISE_FREQ0 11
156 #define MXT_NOISE_FREQ1 12
157 #define MXT_NOISE_FREQ2 13
158 #define MXT_NOISE_FREQ3 14
159 #define MXT_NOISE_FREQ4 15
160 #define MXT_NOISE_IDLEGCAFVALID 16
162 /* MXT_SPT_COMMSCONFIG_T18 */
163 #define MXT_COMMS_CTRL 0
164 #define MXT_COMMS_CMD 1
166 /* MXT_SPT_CTECONFIG_T28 field */
167 #define MXT_CTE_CTRL 0
168 #define MXT_CTE_CMD 1
169 #define MXT_CTE_MODE 2
170 #define MXT_CTE_IDLEGCAFDEPTH 3
171 #define MXT_CTE_ACTVGCAFDEPTH 4
172 #define MXT_CTE_VOLTAGE 5
174 #define MXT_VOLTAGE_DEFAULT 2700000
175 #define MXT_VOLTAGE_STEP 10000
177 /* Define for MXT_GEN_COMMAND_T6 */
178 #define MXT_BOOT_VALUE 0xa5
179 #define MXT_BACKUP_VALUE 0x55
180 #define MXT_BACKUP_TIME 50 /* msec */
181 #define MXT_RESET_TIME 200 /* msec */
183 #define MXT_FWRESET_TIME 175 /* msec */
185 /* Command to unlock bootloader */
186 #define MXT_UNLOCK_CMD_MSB 0xaa
187 #define MXT_UNLOCK_CMD_LSB 0xdc
189 /* Bootloader mode status */
190 #define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */
191 #define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */
192 #define MXT_FRAME_CRC_CHECK 0x02
193 #define MXT_FRAME_CRC_FAIL 0x03
194 #define MXT_FRAME_CRC_PASS 0x04
195 #define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */
196 #define MXT_BOOT_STATUS_MASK 0x3f
199 #define MXT_UNGRIP (1 << 0)
200 #define MXT_SUPPRESS (1 << 1)
201 #define MXT_AMP (1 << 2)
202 #define MXT_VECTOR (1 << 3)
203 #define MXT_MOVE (1 << 4)
204 #define MXT_RELEASE (1 << 5)
205 #define MXT_PRESS (1 << 6)
206 #define MXT_DETECT (1 << 7)
208 /* Touch orient bits */
209 #define MXT_XY_SWITCH (1 << 0)
210 #define MXT_X_INVERT (1 << 1)
211 #define MXT_Y_INVERT (1 << 2)
213 /* Touchscreen absolute values */
214 #define MXT_MAX_AREA 0xff
216 #define MXT_PIXELS_PER_MM 20
232 u8 instances_minus_one;
241 /* Each client has this additional data */
243 struct i2c_client *client;
244 struct input_dev *input_dev;
245 char phys[64]; /* device physical location */
246 const struct mxt_platform_data *pdata;
247 struct mxt_object *object_table;
248 struct mxt_info info;
254 /* Cached parameters from object table */
261 static size_t mxt_obj_size(const struct mxt_object *obj)
263 return obj->size_minus_one + 1;
266 static size_t mxt_obj_instances(const struct mxt_object *obj)
268 return obj->instances_minus_one + 1;
271 static bool mxt_object_readable(unsigned int type)
274 case MXT_GEN_COMMAND_T6:
275 case MXT_GEN_POWER_T7:
276 case MXT_GEN_ACQUIRE_T8:
277 case MXT_GEN_DATASOURCE_T53:
278 case MXT_TOUCH_MULTI_T9:
279 case MXT_TOUCH_KEYARRAY_T15:
280 case MXT_TOUCH_PROXIMITY_T23:
281 case MXT_TOUCH_PROXKEY_T52:
282 case MXT_PROCI_GRIPFACE_T20:
283 case MXT_PROCG_NOISE_T22:
284 case MXT_PROCI_ONETOUCH_T24:
285 case MXT_PROCI_TWOTOUCH_T27:
286 case MXT_PROCI_GRIP_T40:
287 case MXT_PROCI_PALM_T41:
288 case MXT_PROCI_TOUCHSUPPRESSION_T42:
289 case MXT_PROCI_STYLUS_T47:
290 case MXT_PROCG_NOISESUPPRESSION_T48:
291 case MXT_SPT_COMMSCONFIG_T18:
292 case MXT_SPT_GPIOPWM_T19:
293 case MXT_SPT_SELFTEST_T25:
294 case MXT_SPT_CTECONFIG_T28:
295 case MXT_SPT_USERDATA_T38:
296 case MXT_SPT_DIGITIZER_T43:
297 case MXT_SPT_CTECONFIG_T46:
304 static bool mxt_object_writable(unsigned int type)
307 case MXT_GEN_COMMAND_T6:
308 case MXT_GEN_POWER_T7:
309 case MXT_GEN_ACQUIRE_T8:
310 case MXT_TOUCH_MULTI_T9:
311 case MXT_TOUCH_KEYARRAY_T15:
312 case MXT_TOUCH_PROXIMITY_T23:
313 case MXT_TOUCH_PROXKEY_T52:
314 case MXT_PROCI_GRIPFACE_T20:
315 case MXT_PROCG_NOISE_T22:
316 case MXT_PROCI_ONETOUCH_T24:
317 case MXT_PROCI_TWOTOUCH_T27:
318 case MXT_PROCI_GRIP_T40:
319 case MXT_PROCI_PALM_T41:
320 case MXT_PROCI_TOUCHSUPPRESSION_T42:
321 case MXT_PROCI_STYLUS_T47:
322 case MXT_PROCG_NOISESUPPRESSION_T48:
323 case MXT_SPT_COMMSCONFIG_T18:
324 case MXT_SPT_GPIOPWM_T19:
325 case MXT_SPT_SELFTEST_T25:
326 case MXT_SPT_CTECONFIG_T28:
327 case MXT_SPT_DIGITIZER_T43:
328 case MXT_SPT_CTECONFIG_T46:
335 static void mxt_dump_message(struct device *dev,
336 struct mxt_message *message)
338 dev_dbg(dev, "reportid: %u\tmessage: %*ph\n",
339 message->reportid, 7, message->message);
342 static int mxt_check_bootloader(struct i2c_client *client,
348 if (i2c_master_recv(client, &val, 1) != 1) {
349 dev_err(&client->dev, "%s: i2c recv failed\n", __func__);
354 case MXT_WAITING_BOOTLOAD_CMD:
355 case MXT_WAITING_FRAME_DATA:
356 val &= ~MXT_BOOT_STATUS_MASK;
358 case MXT_FRAME_CRC_PASS:
359 if (val == MXT_FRAME_CRC_CHECK)
367 dev_err(&client->dev, "Unvalid bootloader mode state\n");
374 static int mxt_unlock_bootloader(struct i2c_client *client)
378 buf[0] = MXT_UNLOCK_CMD_LSB;
379 buf[1] = MXT_UNLOCK_CMD_MSB;
381 if (i2c_master_send(client, buf, 2) != 2) {
382 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
389 static int mxt_fw_write(struct i2c_client *client,
390 const u8 *data, unsigned int frame_size)
392 if (i2c_master_send(client, data, frame_size) != frame_size) {
393 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
400 static int __mxt_read_reg(struct i2c_client *client,
401 u16 reg, u16 len, void *val)
403 struct i2c_msg xfer[2];
408 buf[1] = (reg >> 8) & 0xff;
411 xfer[0].addr = client->addr;
417 xfer[1].addr = client->addr;
418 xfer[1].flags = I2C_M_RD;
422 ret = i2c_transfer(client->adapter, xfer, 2);
428 dev_err(&client->dev, "%s: i2c transfer failed (%d)\n",
435 static int mxt_read_reg(struct i2c_client *client, u16 reg, u8 *val)
437 return __mxt_read_reg(client, reg, 1, val);
440 static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
448 buf = kmalloc(count, GFP_KERNEL);
453 buf[1] = (reg >> 8) & 0xff;
454 memcpy(&buf[2], val, len);
456 ret = i2c_master_send(client, buf, count);
462 dev_err(&client->dev, "%s: i2c send failed (%d)\n",
470 static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
472 return __mxt_write_reg(client, reg, 1, &val);
475 static struct mxt_object *
476 mxt_get_object(struct mxt_data *data, u8 type)
478 struct mxt_object *object;
481 for (i = 0; i < data->info.object_num; i++) {
482 object = data->object_table + i;
483 if (object->type == type)
487 dev_err(&data->client->dev, "Invalid object type\n");
491 static int mxt_read_message(struct mxt_data *data,
492 struct mxt_message *message)
494 struct mxt_object *object;
497 object = mxt_get_object(data, MXT_GEN_MESSAGE_T5);
501 reg = object->start_address;
502 return __mxt_read_reg(data->client, reg,
503 sizeof(struct mxt_message), message);
506 static int mxt_write_object(struct mxt_data *data,
507 u8 type, u8 offset, u8 val)
509 struct mxt_object *object;
512 object = mxt_get_object(data, type);
513 if (!object || offset >= mxt_obj_size(object))
516 reg = object->start_address;
517 return mxt_write_reg(data->client, reg + offset, val);
520 static void mxt_input_button(struct mxt_data *data, struct mxt_message *message)
522 struct input_dev *input = data->input_dev;
523 const struct mxt_platform_data *pdata = data->pdata;
527 /* Active-low switch */
528 for (i = 0; i < pdata->t19_num_keys; i++) {
529 if (pdata->t19_keymap[i] == KEY_RESERVED)
531 button = !(message->message[0] & (1 << i));
532 input_report_key(input, pdata->t19_keymap[i], button);
536 static void mxt_input_touchevent(struct mxt_data *data,
537 struct mxt_message *message, int id)
539 struct device *dev = &data->client->dev;
540 u8 status = message->message[0];
541 struct input_dev *input_dev = data->input_dev;
547 x = (message->message[1] << 4) | ((message->message[3] >> 4) & 0xf);
548 y = (message->message[2] << 4) | ((message->message[3] & 0xf));
549 if (data->max_x < 1024)
551 if (data->max_y < 1024)
554 area = message->message[4];
555 pressure = message->message[5];
558 "[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u\n",
560 (status & MXT_DETECT) ? 'D' : '.',
561 (status & MXT_PRESS) ? 'P' : '.',
562 (status & MXT_RELEASE) ? 'R' : '.',
563 (status & MXT_MOVE) ? 'M' : '.',
564 (status & MXT_VECTOR) ? 'V' : '.',
565 (status & MXT_AMP) ? 'A' : '.',
566 (status & MXT_SUPPRESS) ? 'S' : '.',
567 (status & MXT_UNGRIP) ? 'U' : '.',
568 x, y, area, pressure);
570 input_mt_slot(input_dev, id);
571 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER,
572 status & MXT_DETECT);
574 if (status & MXT_DETECT) {
575 input_report_abs(input_dev, ABS_MT_POSITION_X, x);
576 input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
577 input_report_abs(input_dev, ABS_MT_PRESSURE, pressure);
578 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area);
582 static unsigned mxt_extract_T6_csum(const u8 *csum)
584 return csum[0] | (csum[1] << 8) | (csum[2] << 16);
587 static bool mxt_is_T9_message(struct mxt_data *data, struct mxt_message *msg)
589 u8 id = msg->reportid;
590 return (id >= data->T9_reportid_min && id <= data->T9_reportid_max);
593 static irqreturn_t mxt_interrupt(int irq, void *dev_id)
595 struct mxt_data *data = dev_id;
596 struct mxt_message message;
597 const u8 *payload = &message.message[0];
598 struct device *dev = &data->client->dev;
600 bool update_input = false;
603 if (mxt_read_message(data, &message)) {
604 dev_err(dev, "Failed to read message\n");
608 reportid = message.reportid;
610 if (reportid == data->T6_reportid) {
611 u8 status = payload[0];
612 unsigned csum = mxt_extract_T6_csum(&payload[1]);
613 dev_dbg(dev, "Status: %02x Config Checksum: %06x\n",
615 } else if (mxt_is_T9_message(data, &message)) {
616 int id = reportid - data->T9_reportid_min;
617 mxt_input_touchevent(data, &message, id);
619 } else if (message.reportid == data->T19_reportid) {
620 mxt_input_button(data, &message);
623 mxt_dump_message(dev, &message);
625 } while (reportid != 0xff);
628 input_mt_report_pointer_emulation(data->input_dev, false);
629 input_sync(data->input_dev);
635 static int mxt_check_reg_init(struct mxt_data *data)
637 const struct mxt_platform_data *pdata = data->pdata;
638 struct mxt_object *object;
639 struct device *dev = &data->client->dev;
644 if (!pdata->config) {
645 dev_dbg(dev, "No cfg data defined, skipping reg init\n");
649 for (i = 0; i < data->info.object_num; i++) {
650 object = data->object_table + i;
652 if (!mxt_object_writable(object->type))
655 size = mxt_obj_size(object) * mxt_obj_instances(object);
656 if (index + size > pdata->config_length) {
657 dev_err(dev, "Not enough config data!\n");
661 ret = __mxt_write_reg(data->client, object->start_address,
662 size, &pdata->config[index]);
671 static int mxt_make_highchg(struct mxt_data *data)
673 struct device *dev = &data->client->dev;
674 struct mxt_message message;
678 /* Read dummy message to make high CHG pin */
680 error = mxt_read_message(data, &message);
683 } while (message.reportid != 0xff && --count);
686 dev_err(dev, "CHG pin isn't cleared\n");
693 static int mxt_get_info(struct mxt_data *data)
695 struct i2c_client *client = data->client;
696 struct mxt_info *info = &data->info;
699 /* Read 7-byte info block starting at address 0 */
700 error = __mxt_read_reg(client, MXT_INFO, sizeof(*info), info);
707 static int mxt_get_object_table(struct mxt_data *data)
709 struct i2c_client *client = data->client;
715 table_size = data->info.object_num * sizeof(struct mxt_object);
716 error = __mxt_read_reg(client, MXT_OBJECT_START, table_size,
721 /* Valid Report IDs start counting from 1 */
723 for (i = 0; i < data->info.object_num; i++) {
724 struct mxt_object *object = data->object_table + i;
727 le16_to_cpus(&object->start_address);
729 if (object->num_report_ids) {
731 reportid += object->num_report_ids *
732 mxt_obj_instances(object);
733 max_id = reportid - 1;
739 dev_dbg(&data->client->dev,
740 "Type %2d Start %3d Size %3zd Instances %2zd ReportIDs %3u : %3u\n",
741 object->type, object->start_address,
742 mxt_obj_size(object), mxt_obj_instances(object),
745 switch (object->type) {
746 case MXT_GEN_COMMAND_T6:
747 data->T6_reportid = min_id;
749 case MXT_TOUCH_MULTI_T9:
750 data->T9_reportid_min = min_id;
751 data->T9_reportid_max = max_id;
753 case MXT_SPT_GPIOPWM_T19:
754 data->T19_reportid = min_id;
762 static void mxt_free_object_table(struct mxt_data *data)
764 kfree(data->object_table);
765 data->object_table = NULL;
766 data->T6_reportid = 0;
767 data->T9_reportid_min = 0;
768 data->T9_reportid_max = 0;
769 data->T19_reportid = 0;
772 static int mxt_initialize(struct mxt_data *data)
774 struct i2c_client *client = data->client;
775 struct mxt_info *info = &data->info;
779 error = mxt_get_info(data);
783 data->object_table = kcalloc(info->object_num,
784 sizeof(struct mxt_object),
786 if (!data->object_table) {
787 dev_err(&client->dev, "Failed to allocate memory\n");
791 /* Get object table information */
792 error = mxt_get_object_table(data);
794 goto err_free_object_table;
796 /* Check register init values */
797 error = mxt_check_reg_init(data);
799 goto err_free_object_table;
801 /* Backup to memory */
802 mxt_write_object(data, MXT_GEN_COMMAND_T6,
803 MXT_COMMAND_BACKUPNV,
805 msleep(MXT_BACKUP_TIME);
808 mxt_write_object(data, MXT_GEN_COMMAND_T6,
809 MXT_COMMAND_RESET, 1);
810 msleep(MXT_RESET_TIME);
812 /* Update matrix size at info struct */
813 error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, &val);
815 goto err_free_object_table;
816 info->matrix_xsize = val;
818 error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, &val);
820 goto err_free_object_table;
821 info->matrix_ysize = val;
823 dev_info(&client->dev,
824 "Family ID: %u Variant ID: %u Major.Minor.Build: %u.%u.%02X\n",
825 info->family_id, info->variant_id, info->version >> 4,
826 info->version & 0xf, info->build);
828 dev_info(&client->dev,
829 "Matrix X Size: %u Matrix Y Size: %u Object Num: %u\n",
830 info->matrix_xsize, info->matrix_ysize,
835 err_free_object_table:
836 mxt_free_object_table(data);
840 static void mxt_calc_resolution(struct mxt_data *data)
842 unsigned int max_x = data->pdata->x_size - 1;
843 unsigned int max_y = data->pdata->y_size - 1;
845 if (data->pdata->orient & MXT_XY_SWITCH) {
854 /* Firmware Version is returned as Major.Minor.Build */
855 static ssize_t mxt_fw_version_show(struct device *dev,
856 struct device_attribute *attr, char *buf)
858 struct mxt_data *data = dev_get_drvdata(dev);
859 struct mxt_info *info = &data->info;
860 return scnprintf(buf, PAGE_SIZE, "%u.%u.%02X\n",
861 info->version >> 4, info->version & 0xf, info->build);
864 /* Hardware Version is returned as FamilyID.VariantID */
865 static ssize_t mxt_hw_version_show(struct device *dev,
866 struct device_attribute *attr, char *buf)
868 struct mxt_data *data = dev_get_drvdata(dev);
869 struct mxt_info *info = &data->info;
870 return scnprintf(buf, PAGE_SIZE, "%u.%u\n",
871 info->family_id, info->variant_id);
874 static ssize_t mxt_show_instance(char *buf, int count,
875 struct mxt_object *object, int instance,
880 if (mxt_obj_instances(object) > 1)
881 count += scnprintf(buf + count, PAGE_SIZE - count,
882 "Instance %u\n", instance);
884 for (i = 0; i < mxt_obj_size(object); i++)
885 count += scnprintf(buf + count, PAGE_SIZE - count,
886 "\t[%2u]: %02x (%d)\n", i, val[i], val[i]);
887 count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
892 static ssize_t mxt_object_show(struct device *dev,
893 struct device_attribute *attr, char *buf)
895 struct mxt_data *data = dev_get_drvdata(dev);
896 struct mxt_object *object;
902 /* Pre-allocate buffer large enough to hold max sized object. */
903 obuf = kmalloc(256, GFP_KERNEL);
908 for (i = 0; i < data->info.object_num; i++) {
909 object = data->object_table + i;
911 if (!mxt_object_readable(object->type))
914 count += scnprintf(buf + count, PAGE_SIZE - count,
915 "T%u:\n", object->type);
917 for (j = 0; j < mxt_obj_instances(object); j++) {
918 u16 size = mxt_obj_size(object);
919 u16 addr = object->start_address + j * size;
921 error = __mxt_read_reg(data->client, addr, size, obuf);
925 count = mxt_show_instance(buf, count, object, j, obuf);
931 return error ?: count;
934 static int mxt_load_fw(struct device *dev, const char *fn)
936 struct mxt_data *data = dev_get_drvdata(dev);
937 struct i2c_client *client = data->client;
938 const struct firmware *fw = NULL;
939 unsigned int frame_size;
940 unsigned int pos = 0;
943 ret = request_firmware(&fw, fn, dev);
945 dev_err(dev, "Unable to open firmware %s\n", fn);
949 /* Change to the bootloader mode */
950 mxt_write_object(data, MXT_GEN_COMMAND_T6,
951 MXT_COMMAND_RESET, MXT_BOOT_VALUE);
952 msleep(MXT_RESET_TIME);
954 /* Change to slave address of bootloader */
955 if (client->addr == MXT_APP_LOW)
956 client->addr = MXT_BOOT_LOW;
958 client->addr = MXT_BOOT_HIGH;
960 ret = mxt_check_bootloader(client, MXT_WAITING_BOOTLOAD_CMD);
964 /* Unlock bootloader */
965 mxt_unlock_bootloader(client);
967 while (pos < fw->size) {
968 ret = mxt_check_bootloader(client,
969 MXT_WAITING_FRAME_DATA);
973 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
975 /* We should add 2 at frame size as the the firmware data is not
976 * included the CRC bytes.
980 /* Write one frame to device */
981 mxt_fw_write(client, fw->data + pos, frame_size);
983 ret = mxt_check_bootloader(client,
990 dev_dbg(dev, "Updated %d bytes / %zd bytes\n", pos, fw->size);
994 release_firmware(fw);
996 /* Change to slave address of application */
997 if (client->addr == MXT_BOOT_LOW)
998 client->addr = MXT_APP_LOW;
1000 client->addr = MXT_APP_HIGH;
1005 static ssize_t mxt_update_fw_store(struct device *dev,
1006 struct device_attribute *attr,
1007 const char *buf, size_t count)
1009 struct mxt_data *data = dev_get_drvdata(dev);
1012 disable_irq(data->irq);
1014 error = mxt_load_fw(dev, MXT_FW_NAME);
1016 dev_err(dev, "The firmware update failed(%d)\n", error);
1019 dev_dbg(dev, "The firmware update succeeded\n");
1021 /* Wait for reset */
1022 msleep(MXT_FWRESET_TIME);
1024 mxt_free_object_table(data);
1026 mxt_initialize(data);
1029 enable_irq(data->irq);
1031 error = mxt_make_highchg(data);
1038 static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL);
1039 static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL);
1040 static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
1041 static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
1043 static struct attribute *mxt_attrs[] = {
1044 &dev_attr_fw_version.attr,
1045 &dev_attr_hw_version.attr,
1046 &dev_attr_object.attr,
1047 &dev_attr_update_fw.attr,
1051 static const struct attribute_group mxt_attr_group = {
1055 static void mxt_start(struct mxt_data *data)
1058 mxt_write_object(data,
1059 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0x83);
1062 static void mxt_stop(struct mxt_data *data)
1065 mxt_write_object(data,
1066 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0);
1069 static int mxt_input_open(struct input_dev *dev)
1071 struct mxt_data *data = input_get_drvdata(dev);
1078 static void mxt_input_close(struct input_dev *dev)
1080 struct mxt_data *data = input_get_drvdata(dev);
1085 static int mxt_probe(struct i2c_client *client,
1086 const struct i2c_device_id *id)
1088 const struct mxt_platform_data *pdata = dev_get_platdata(&client->dev);
1089 struct mxt_data *data;
1090 struct input_dev *input_dev;
1092 unsigned int num_mt_slots;
1093 unsigned int mt_flags = 0;
1099 data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
1100 input_dev = input_allocate_device();
1101 if (!data || !input_dev) {
1102 dev_err(&client->dev, "Failed to allocate memory\n");
1107 input_dev->name = "Atmel maXTouch Touchscreen";
1108 snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
1109 client->adapter->nr, client->addr);
1111 input_dev->phys = data->phys;
1113 input_dev->id.bustype = BUS_I2C;
1114 input_dev->dev.parent = &client->dev;
1115 input_dev->open = mxt_input_open;
1116 input_dev->close = mxt_input_close;
1118 data->client = client;
1119 data->input_dev = input_dev;
1120 data->pdata = pdata;
1121 data->irq = client->irq;
1123 mxt_calc_resolution(data);
1125 error = mxt_initialize(data);
1129 __set_bit(EV_ABS, input_dev->evbit);
1130 __set_bit(EV_KEY, input_dev->evbit);
1131 __set_bit(BTN_TOUCH, input_dev->keybit);
1133 if (pdata->t19_num_keys) {
1134 __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
1136 for (i = 0; i < pdata->t19_num_keys; i++)
1137 if (pdata->t19_keymap[i] != KEY_RESERVED)
1138 input_set_capability(input_dev, EV_KEY,
1139 pdata->t19_keymap[i]);
1141 mt_flags |= INPUT_MT_POINTER;
1143 input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM);
1144 input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM);
1145 input_abs_set_res(input_dev, ABS_MT_POSITION_X,
1147 input_abs_set_res(input_dev, ABS_MT_POSITION_Y,
1150 input_dev->name = "Atmel maXTouch Touchpad";
1153 /* For single touch */
1154 input_set_abs_params(input_dev, ABS_X,
1155 0, data->max_x, 0, 0);
1156 input_set_abs_params(input_dev, ABS_Y,
1157 0, data->max_y, 0, 0);
1158 input_set_abs_params(input_dev, ABS_PRESSURE,
1161 /* For multi touch */
1162 num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
1163 error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags);
1165 goto err_free_object;
1166 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
1167 0, MXT_MAX_AREA, 0, 0);
1168 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
1169 0, data->max_x, 0, 0);
1170 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
1171 0, data->max_y, 0, 0);
1172 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
1175 input_set_drvdata(input_dev, data);
1176 i2c_set_clientdata(client, data);
1178 error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
1179 pdata->irqflags | IRQF_ONESHOT,
1180 client->name, data);
1182 dev_err(&client->dev, "Failed to register interrupt\n");
1183 goto err_free_object;
1186 error = mxt_make_highchg(data);
1190 error = input_register_device(input_dev);
1194 error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
1196 goto err_unregister_device;
1200 err_unregister_device:
1201 input_unregister_device(input_dev);
1204 free_irq(client->irq, data);
1206 kfree(data->object_table);
1208 input_free_device(input_dev);
1213 static int mxt_remove(struct i2c_client *client)
1215 struct mxt_data *data = i2c_get_clientdata(client);
1217 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
1218 free_irq(data->irq, data);
1219 input_unregister_device(data->input_dev);
1220 kfree(data->object_table);
1226 #ifdef CONFIG_PM_SLEEP
1227 static int mxt_suspend(struct device *dev)
1229 struct i2c_client *client = to_i2c_client(dev);
1230 struct mxt_data *data = i2c_get_clientdata(client);
1231 struct input_dev *input_dev = data->input_dev;
1233 mutex_lock(&input_dev->mutex);
1235 if (input_dev->users)
1238 mutex_unlock(&input_dev->mutex);
1243 static int mxt_resume(struct device *dev)
1245 struct i2c_client *client = to_i2c_client(dev);
1246 struct mxt_data *data = i2c_get_clientdata(client);
1247 struct input_dev *input_dev = data->input_dev;
1250 mxt_write_object(data, MXT_GEN_COMMAND_T6,
1251 MXT_COMMAND_RESET, 1);
1253 msleep(MXT_RESET_TIME);
1255 mutex_lock(&input_dev->mutex);
1257 if (input_dev->users)
1260 mutex_unlock(&input_dev->mutex);
1266 static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
1268 static const struct i2c_device_id mxt_id[] = {
1269 { "qt602240_ts", 0 },
1270 { "atmel_mxt_ts", 0 },
1271 { "atmel_mxt_tp", 0 },
1275 MODULE_DEVICE_TABLE(i2c, mxt_id);
1277 static struct i2c_driver mxt_driver = {
1279 .name = "atmel_mxt_ts",
1280 .owner = THIS_MODULE,
1284 .remove = mxt_remove,
1288 module_i2c_driver(mxt_driver);
1290 /* Module information */
1291 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
1292 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
1293 MODULE_LICENSE("GPL");