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/init.h>
18 #include <linux/completion.h>
19 #include <linux/delay.h>
20 #include <linux/firmware.h>
21 #include <linux/i2c.h>
22 #include <linux/i2c/atmel_mxt_ts.h>
23 #include <linux/input/mt.h>
24 #include <linux/interrupt.h>
25 #include <linux/slab.h>
33 #define MXT_FW_NAME "maxtouch.fw"
37 #define MXT_FAMILY_ID 0x00
38 #define MXT_VARIANT_ID 0x01
39 #define MXT_VERSION 0x02
40 #define MXT_BUILD 0x03
41 #define MXT_MATRIX_X_SIZE 0x04
42 #define MXT_MATRIX_Y_SIZE 0x05
43 #define MXT_OBJECT_NUM 0x06
44 #define MXT_OBJECT_START 0x07
46 #define MXT_OBJECT_SIZE 6
49 #define MXT_DEBUG_DIAGNOSTIC_T37 37
50 #define MXT_GEN_MESSAGE_T5 5
51 #define MXT_GEN_COMMAND_T6 6
52 #define MXT_GEN_POWER_T7 7
53 #define MXT_GEN_ACQUIRE_T8 8
54 #define MXT_GEN_DATASOURCE_T53 53
55 #define MXT_TOUCH_MULTI_T9 9
56 #define MXT_TOUCH_KEYARRAY_T15 15
57 #define MXT_TOUCH_PROXIMITY_T23 23
58 #define MXT_TOUCH_PROXKEY_T52 52
59 #define MXT_PROCI_GRIPFACE_T20 20
60 #define MXT_PROCG_NOISE_T22 22
61 #define MXT_PROCI_ONETOUCH_T24 24
62 #define MXT_PROCI_TWOTOUCH_T27 27
63 #define MXT_PROCI_GRIP_T40 40
64 #define MXT_PROCI_PALM_T41 41
65 #define MXT_PROCI_TOUCHSUPPRESSION_T42 42
66 #define MXT_PROCI_STYLUS_T47 47
67 #define MXT_PROCG_NOISESUPPRESSION_T48 48
68 #define MXT_SPT_COMMSCONFIG_T18 18
69 #define MXT_SPT_GPIOPWM_T19 19
70 #define MXT_SPT_SELFTEST_T25 25
71 #define MXT_SPT_CTECONFIG_T28 28
72 #define MXT_SPT_USERDATA_T38 38
73 #define MXT_SPT_DIGITIZER_T43 43
74 #define MXT_SPT_MESSAGECOUNT_T44 44
75 #define MXT_SPT_CTECONFIG_T46 46
77 /* MXT_GEN_COMMAND_T6 field */
78 #define MXT_COMMAND_RESET 0
79 #define MXT_COMMAND_BACKUPNV 1
80 #define MXT_COMMAND_CALIBRATE 2
81 #define MXT_COMMAND_REPORTALL 3
82 #define MXT_COMMAND_DIAGNOSTIC 5
84 /* Define for T6 status byte */
85 #define MXT_T6_STATUS_RESET (1 << 7)
87 /* MXT_GEN_POWER_T7 field */
88 #define MXT_POWER_IDLEACQINT 0
89 #define MXT_POWER_ACTVACQINT 1
90 #define MXT_POWER_ACTV2IDLETO 2
92 /* MXT_GEN_ACQUIRE_T8 field */
93 #define MXT_ACQUIRE_CHRGTIME 0
94 #define MXT_ACQUIRE_TCHDRIFT 2
95 #define MXT_ACQUIRE_DRIFTST 3
96 #define MXT_ACQUIRE_TCHAUTOCAL 4
97 #define MXT_ACQUIRE_SYNC 5
98 #define MXT_ACQUIRE_ATCHCALST 6
99 #define MXT_ACQUIRE_ATCHCALSTHR 7
101 /* MXT_TOUCH_MULTI_T9 field */
102 #define MXT_TOUCH_CTRL 0
103 #define MXT_TOUCH_XORIGIN 1
104 #define MXT_TOUCH_YORIGIN 2
105 #define MXT_TOUCH_XSIZE 3
106 #define MXT_TOUCH_YSIZE 4
107 #define MXT_TOUCH_BLEN 6
108 #define MXT_TOUCH_TCHTHR 7
109 #define MXT_TOUCH_TCHDI 8
110 #define MXT_TOUCH_ORIENT 9
111 #define MXT_TOUCH_MOVHYSTI 11
112 #define MXT_TOUCH_MOVHYSTN 12
113 #define MXT_TOUCH_NUMTOUCH 14
114 #define MXT_TOUCH_MRGHYST 15
115 #define MXT_TOUCH_MRGTHR 16
116 #define MXT_TOUCH_AMPHYST 17
117 #define MXT_TOUCH_XRANGE_LSB 18
118 #define MXT_TOUCH_XRANGE_MSB 19
119 #define MXT_TOUCH_YRANGE_LSB 20
120 #define MXT_TOUCH_YRANGE_MSB 21
121 #define MXT_TOUCH_XLOCLIP 22
122 #define MXT_TOUCH_XHICLIP 23
123 #define MXT_TOUCH_YLOCLIP 24
124 #define MXT_TOUCH_YHICLIP 25
125 #define MXT_TOUCH_XEDGECTRL 26
126 #define MXT_TOUCH_XEDGEDIST 27
127 #define MXT_TOUCH_YEDGECTRL 28
128 #define MXT_TOUCH_YEDGEDIST 29
129 #define MXT_TOUCH_JUMPLIMIT 30
131 /* MXT_PROCI_GRIPFACE_T20 field */
132 #define MXT_GRIPFACE_CTRL 0
133 #define MXT_GRIPFACE_XLOGRIP 1
134 #define MXT_GRIPFACE_XHIGRIP 2
135 #define MXT_GRIPFACE_YLOGRIP 3
136 #define MXT_GRIPFACE_YHIGRIP 4
137 #define MXT_GRIPFACE_MAXTCHS 5
138 #define MXT_GRIPFACE_SZTHR1 7
139 #define MXT_GRIPFACE_SZTHR2 8
140 #define MXT_GRIPFACE_SHPTHR1 9
141 #define MXT_GRIPFACE_SHPTHR2 10
142 #define MXT_GRIPFACE_SUPEXTTO 11
144 /* MXT_PROCI_NOISE field */
145 #define MXT_NOISE_CTRL 0
146 #define MXT_NOISE_OUTFLEN 1
147 #define MXT_NOISE_GCAFUL_LSB 3
148 #define MXT_NOISE_GCAFUL_MSB 4
149 #define MXT_NOISE_GCAFLL_LSB 5
150 #define MXT_NOISE_GCAFLL_MSB 6
151 #define MXT_NOISE_ACTVGCAFVALID 7
152 #define MXT_NOISE_NOISETHR 8
153 #define MXT_NOISE_FREQHOPSCALE 10
154 #define MXT_NOISE_FREQ0 11
155 #define MXT_NOISE_FREQ1 12
156 #define MXT_NOISE_FREQ2 13
157 #define MXT_NOISE_FREQ3 14
158 #define MXT_NOISE_FREQ4 15
159 #define MXT_NOISE_IDLEGCAFVALID 16
161 /* MXT_SPT_COMMSCONFIG_T18 */
162 #define MXT_COMMS_CTRL 0
163 #define MXT_COMMS_CMD 1
165 /* MXT_SPT_CTECONFIG_T28 field */
166 #define MXT_CTE_CTRL 0
167 #define MXT_CTE_CMD 1
168 #define MXT_CTE_MODE 2
169 #define MXT_CTE_IDLEGCAFDEPTH 3
170 #define MXT_CTE_ACTVGCAFDEPTH 4
171 #define MXT_CTE_VOLTAGE 5
173 #define MXT_VOLTAGE_DEFAULT 2700000
174 #define MXT_VOLTAGE_STEP 10000
176 /* Define for MXT_GEN_COMMAND_T6 */
177 #define MXT_BOOT_VALUE 0xa5
178 #define MXT_RESET_VALUE 0x01
179 #define MXT_BACKUP_VALUE 0x55
182 #define MXT_BACKUP_TIME 50 /* msec */
183 #define MXT_RESET_TIME 200 /* msec */
184 #define MXT_RESET_TIMEOUT 3000 /* msec */
185 #define MXT_CRC_TIMEOUT 1000 /* msec */
186 #define MXT_FW_RESET_TIME 3000 /* msec */
187 #define MXT_FW_CHG_TIMEOUT 300 /* msec */
189 /* Command to unlock bootloader */
190 #define MXT_UNLOCK_CMD_MSB 0xaa
191 #define MXT_UNLOCK_CMD_LSB 0xdc
193 /* Bootloader mode status */
194 #define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */
195 #define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */
196 #define MXT_FRAME_CRC_CHECK 0x02
197 #define MXT_FRAME_CRC_FAIL 0x03
198 #define MXT_FRAME_CRC_PASS 0x04
199 #define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */
200 #define MXT_BOOT_STATUS_MASK 0x3f
201 #define MXT_BOOT_EXTENDED_ID (1 << 5)
202 #define MXT_BOOT_ID_MASK 0x1f
205 #define MXT_UNGRIP (1 << 0)
206 #define MXT_SUPPRESS (1 << 1)
207 #define MXT_AMP (1 << 2)
208 #define MXT_VECTOR (1 << 3)
209 #define MXT_MOVE (1 << 4)
210 #define MXT_RELEASE (1 << 5)
211 #define MXT_PRESS (1 << 6)
212 #define MXT_DETECT (1 << 7)
214 /* Touch orient bits */
215 #define MXT_XY_SWITCH (1 << 0)
216 #define MXT_X_INVERT (1 << 1)
217 #define MXT_Y_INVERT (1 << 2)
219 /* Touchscreen absolute values */
220 #define MXT_MAX_AREA 0xff
222 #define MXT_PIXELS_PER_MM 20
238 u8 instances_minus_one;
247 /* Each client has this additional data */
249 struct i2c_client *client;
250 struct input_dev *input_dev;
251 char phys[64]; /* device physical location */
252 const struct mxt_platform_data *pdata;
253 struct mxt_object *object_table;
254 struct mxt_info info;
262 /* Cached parameters from object table */
269 /* for fw update in bootloader */
270 struct completion bl_completion;
272 /* for reset handling */
273 struct completion reset_completion;
275 /* for config update handling */
276 struct completion crc_completion;
279 static size_t mxt_obj_size(const struct mxt_object *obj)
281 return obj->size_minus_one + 1;
284 static size_t mxt_obj_instances(const struct mxt_object *obj)
286 return obj->instances_minus_one + 1;
289 static bool mxt_object_readable(unsigned int type)
292 case MXT_GEN_COMMAND_T6:
293 case MXT_GEN_POWER_T7:
294 case MXT_GEN_ACQUIRE_T8:
295 case MXT_GEN_DATASOURCE_T53:
296 case MXT_TOUCH_MULTI_T9:
297 case MXT_TOUCH_KEYARRAY_T15:
298 case MXT_TOUCH_PROXIMITY_T23:
299 case MXT_TOUCH_PROXKEY_T52:
300 case MXT_PROCI_GRIPFACE_T20:
301 case MXT_PROCG_NOISE_T22:
302 case MXT_PROCI_ONETOUCH_T24:
303 case MXT_PROCI_TWOTOUCH_T27:
304 case MXT_PROCI_GRIP_T40:
305 case MXT_PROCI_PALM_T41:
306 case MXT_PROCI_TOUCHSUPPRESSION_T42:
307 case MXT_PROCI_STYLUS_T47:
308 case MXT_PROCG_NOISESUPPRESSION_T48:
309 case MXT_SPT_COMMSCONFIG_T18:
310 case MXT_SPT_GPIOPWM_T19:
311 case MXT_SPT_SELFTEST_T25:
312 case MXT_SPT_CTECONFIG_T28:
313 case MXT_SPT_USERDATA_T38:
314 case MXT_SPT_DIGITIZER_T43:
315 case MXT_SPT_CTECONFIG_T46:
322 static bool mxt_object_writable(unsigned int type)
325 case MXT_GEN_COMMAND_T6:
326 case MXT_GEN_POWER_T7:
327 case MXT_GEN_ACQUIRE_T8:
328 case MXT_TOUCH_MULTI_T9:
329 case MXT_TOUCH_KEYARRAY_T15:
330 case MXT_TOUCH_PROXIMITY_T23:
331 case MXT_TOUCH_PROXKEY_T52:
332 case MXT_PROCI_GRIPFACE_T20:
333 case MXT_PROCG_NOISE_T22:
334 case MXT_PROCI_ONETOUCH_T24:
335 case MXT_PROCI_TWOTOUCH_T27:
336 case MXT_PROCI_GRIP_T40:
337 case MXT_PROCI_PALM_T41:
338 case MXT_PROCI_TOUCHSUPPRESSION_T42:
339 case MXT_PROCI_STYLUS_T47:
340 case MXT_PROCG_NOISESUPPRESSION_T48:
341 case MXT_SPT_COMMSCONFIG_T18:
342 case MXT_SPT_GPIOPWM_T19:
343 case MXT_SPT_SELFTEST_T25:
344 case MXT_SPT_CTECONFIG_T28:
345 case MXT_SPT_DIGITIZER_T43:
346 case MXT_SPT_CTECONFIG_T46:
353 static void mxt_dump_message(struct device *dev,
354 struct mxt_message *message)
356 dev_dbg(dev, "reportid: %u\tmessage: %*ph\n",
357 message->reportid, 7, message->message);
360 static int mxt_wait_for_completion(struct mxt_data *data,
361 struct completion *comp,
362 unsigned int timeout_ms)
364 struct device *dev = &data->client->dev;
365 unsigned long timeout = msecs_to_jiffies(timeout_ms);
368 ret = wait_for_completion_interruptible_timeout(comp, timeout);
371 } else if (ret == 0) {
372 dev_err(dev, "Wait for completion timed out.\n");
378 static int mxt_bootloader_read(struct mxt_data *data,
379 u8 *val, unsigned int count)
384 msg.addr = data->bootloader_addr;
385 msg.flags = data->client->flags & I2C_M_TEN;
386 msg.flags |= I2C_M_RD;
390 ret = i2c_transfer(data->client->adapter, &msg, 1);
395 ret = ret < 0 ? ret : -EIO;
396 dev_err(&data->client->dev, "%s: i2c recv failed (%d)\n",
403 static int mxt_bootloader_write(struct mxt_data *data,
404 const u8 * const val, unsigned int count)
409 msg.addr = data->bootloader_addr;
410 msg.flags = data->client->flags & I2C_M_TEN;
414 ret = i2c_transfer(data->client->adapter, &msg, 1);
418 ret = ret < 0 ? ret : -EIO;
419 dev_err(&data->client->dev, "%s: i2c send failed (%d)\n",
426 static int mxt_lookup_bootloader_address(struct mxt_data *data)
428 u8 appmode = data->client->addr;
438 bootloader = appmode - 0x26;
441 dev_err(&data->client->dev,
442 "Appmode i2c address 0x%02x not found\n",
447 data->bootloader_addr = bootloader;
451 static u8 mxt_get_bootloader_version(struct mxt_data *data, u8 val)
453 struct device *dev = &data->client->dev;
456 if (val & MXT_BOOT_EXTENDED_ID) {
457 if (mxt_bootloader_read(data, &buf[0], 3) != 0) {
458 dev_err(dev, "%s: i2c failure\n", __func__);
462 dev_dbg(dev, "Bootloader ID:%d Version:%d\n", buf[1], buf[2]);
466 dev_dbg(dev, "Bootloader ID:%d\n", val & MXT_BOOT_ID_MASK);
472 static int mxt_check_bootloader(struct mxt_data *data, unsigned int state)
474 struct device *dev = &data->client->dev;
479 if (state != MXT_WAITING_BOOTLOAD_CMD) {
481 * In application update mode, the interrupt
482 * line signals state transitions. We must wait for the
483 * CHG assertion before reading the status byte.
484 * Once the status byte has been read, the line is deasserted.
486 ret = mxt_wait_for_completion(data, &data->bl_completion,
490 * TODO: handle -ERESTARTSYS better by terminating
491 * fw update process before returning to userspace
492 * by writing length 0x000 to device (iff we are in
493 * WAITING_FRAME_DATA state).
495 dev_err(dev, "Update wait error %d\n", ret);
500 ret = mxt_bootloader_read(data, &val, 1);
504 if (state == MXT_WAITING_BOOTLOAD_CMD)
505 val = mxt_get_bootloader_version(data, val);
508 case MXT_WAITING_BOOTLOAD_CMD:
509 case MXT_WAITING_FRAME_DATA:
510 val &= ~MXT_BOOT_STATUS_MASK;
512 case MXT_FRAME_CRC_PASS:
513 if (val == MXT_FRAME_CRC_CHECK)
521 dev_err(dev, "Invalid bootloader state %02X != %02X\n",
529 static int mxt_unlock_bootloader(struct mxt_data *data)
534 buf[0] = MXT_UNLOCK_CMD_LSB;
535 buf[1] = MXT_UNLOCK_CMD_MSB;
537 ret = mxt_bootloader_write(data, buf, 2);
544 static int __mxt_read_reg(struct i2c_client *client,
545 u16 reg, u16 len, void *val)
547 struct i2c_msg xfer[2];
552 buf[1] = (reg >> 8) & 0xff;
555 xfer[0].addr = client->addr;
561 xfer[1].addr = client->addr;
562 xfer[1].flags = I2C_M_RD;
566 ret = i2c_transfer(client->adapter, xfer, 2);
572 dev_err(&client->dev, "%s: i2c transfer failed (%d)\n",
579 static int mxt_read_reg(struct i2c_client *client, u16 reg, u8 *val)
581 return __mxt_read_reg(client, reg, 1, val);
584 static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
592 buf = kmalloc(count, GFP_KERNEL);
597 buf[1] = (reg >> 8) & 0xff;
598 memcpy(&buf[2], val, len);
600 ret = i2c_master_send(client, buf, count);
606 dev_err(&client->dev, "%s: i2c send failed (%d)\n",
614 static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
616 return __mxt_write_reg(client, reg, 1, &val);
619 static struct mxt_object *
620 mxt_get_object(struct mxt_data *data, u8 type)
622 struct mxt_object *object;
625 for (i = 0; i < data->info.object_num; i++) {
626 object = data->object_table + i;
627 if (object->type == type)
631 dev_err(&data->client->dev, "Invalid object type T%u\n", type);
635 static int mxt_read_message(struct mxt_data *data,
636 struct mxt_message *message)
638 struct mxt_object *object;
641 object = mxt_get_object(data, MXT_GEN_MESSAGE_T5);
645 reg = object->start_address;
646 return __mxt_read_reg(data->client, reg,
647 sizeof(struct mxt_message), message);
650 static int mxt_write_object(struct mxt_data *data,
651 u8 type, u8 offset, u8 val)
653 struct mxt_object *object;
656 object = mxt_get_object(data, type);
657 if (!object || offset >= mxt_obj_size(object))
660 reg = object->start_address;
661 return mxt_write_reg(data->client, reg + offset, val);
664 static void mxt_input_button(struct mxt_data *data, struct mxt_message *message)
666 struct input_dev *input = data->input_dev;
667 const struct mxt_platform_data *pdata = data->pdata;
671 /* Active-low switch */
672 for (i = 0; i < pdata->t19_num_keys; i++) {
673 if (pdata->t19_keymap[i] == KEY_RESERVED)
675 button = !(message->message[0] & (1 << i));
676 input_report_key(input, pdata->t19_keymap[i], button);
680 static void mxt_input_touchevent(struct mxt_data *data,
681 struct mxt_message *message, int id)
683 struct device *dev = &data->client->dev;
684 u8 status = message->message[0];
685 struct input_dev *input_dev = data->input_dev;
691 x = (message->message[1] << 4) | ((message->message[3] >> 4) & 0xf);
692 y = (message->message[2] << 4) | ((message->message[3] & 0xf));
693 if (data->max_x < 1024)
695 if (data->max_y < 1024)
698 area = message->message[4];
699 pressure = message->message[5];
702 "[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u\n",
704 (status & MXT_DETECT) ? 'D' : '.',
705 (status & MXT_PRESS) ? 'P' : '.',
706 (status & MXT_RELEASE) ? 'R' : '.',
707 (status & MXT_MOVE) ? 'M' : '.',
708 (status & MXT_VECTOR) ? 'V' : '.',
709 (status & MXT_AMP) ? 'A' : '.',
710 (status & MXT_SUPPRESS) ? 'S' : '.',
711 (status & MXT_UNGRIP) ? 'U' : '.',
712 x, y, area, pressure);
714 input_mt_slot(input_dev, id);
715 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER,
716 status & MXT_DETECT);
718 if (status & MXT_DETECT) {
719 input_report_abs(input_dev, ABS_MT_POSITION_X, x);
720 input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
721 input_report_abs(input_dev, ABS_MT_PRESSURE, pressure);
722 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area);
726 static u16 mxt_extract_T6_csum(const u8 *csum)
728 return csum[0] | (csum[1] << 8) | (csum[2] << 16);
731 static bool mxt_is_T9_message(struct mxt_data *data, struct mxt_message *msg)
733 u8 id = msg->reportid;
734 return (id >= data->T9_reportid_min && id <= data->T9_reportid_max);
737 static irqreturn_t mxt_process_messages_until_invalid(struct mxt_data *data)
739 struct mxt_message message;
740 const u8 *payload = &message.message[0];
741 struct device *dev = &data->client->dev;
743 bool update_input = false;
747 if (mxt_read_message(data, &message)) {
748 dev_err(dev, "Failed to read message\n");
752 reportid = message.reportid;
754 if (reportid == data->T6_reportid) {
755 u8 status = payload[0];
757 crc = mxt_extract_T6_csum(&payload[1]);
758 if (crc != data->config_crc) {
759 data->config_crc = crc;
760 complete(&data->crc_completion);
763 dev_dbg(dev, "Status: %02x Config Checksum: %06x\n",
764 status, data->config_crc);
766 if (status & MXT_T6_STATUS_RESET)
767 complete(&data->reset_completion);
768 } else if (mxt_is_T9_message(data, &message)) {
769 int id = reportid - data->T9_reportid_min;
770 mxt_input_touchevent(data, &message, id);
772 } else if (message.reportid == data->T19_reportid) {
773 mxt_input_button(data, &message);
776 mxt_dump_message(dev, &message);
778 } while (reportid != 0xff);
781 input_mt_report_pointer_emulation(data->input_dev, false);
782 input_sync(data->input_dev);
788 static irqreturn_t mxt_interrupt(int irq, void *dev_id)
790 struct mxt_data *data = dev_id;
792 if (data->in_bootloader) {
793 /* bootloader state transition completion */
794 complete(&data->bl_completion);
798 return mxt_process_messages_until_invalid(data);
801 static int mxt_t6_command(struct mxt_data *data, u16 cmd_offset,
806 int timeout_counter = 0;
809 reg = data->T6_address + cmd_offset;
811 ret = mxt_write_reg(data->client, reg, value);
820 ret = __mxt_read_reg(data->client, reg, 1, &command_register);
823 } while (command_register != 0 && timeout_counter++ <= 100);
825 if (timeout_counter > 100) {
826 dev_err(&data->client->dev, "Command failed!\n");
833 static int mxt_soft_reset(struct mxt_data *data)
835 struct device *dev = &data->client->dev;
838 dev_info(dev, "Resetting chip\n");
840 reinit_completion(&data->reset_completion);
842 ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_RESET_VALUE, false);
846 ret = mxt_wait_for_completion(data, &data->reset_completion,
854 static void mxt_update_crc(struct mxt_data *data, u8 cmd, u8 value)
857 * On failure, CRC is set to 0 and config will always be
860 data->config_crc = 0;
861 reinit_completion(&data->crc_completion);
863 mxt_t6_command(data, cmd, value, true);
866 * Wait for crc message. On failure, CRC is set to 0 and config will
867 * always be downloaded.
869 mxt_wait_for_completion(data, &data->crc_completion, MXT_CRC_TIMEOUT);
872 static int mxt_check_reg_init(struct mxt_data *data)
874 const struct mxt_platform_data *pdata = data->pdata;
875 struct mxt_object *object;
876 struct device *dev = &data->client->dev;
881 if (!pdata->config) {
882 dev_dbg(dev, "No cfg data defined, skipping reg init\n");
886 mxt_update_crc(data, MXT_COMMAND_REPORTALL, 1);
888 if (data->config_crc == pdata->config_crc) {
889 dev_info(dev, "Config CRC 0x%06X: OK\n", data->config_crc);
893 dev_info(dev, "Config CRC 0x%06X: does not match 0x%06X\n",
894 data->config_crc, pdata->config_crc);
896 for (i = 0; i < data->info.object_num; i++) {
897 object = data->object_table + i;
899 if (!mxt_object_writable(object->type))
902 size = mxt_obj_size(object) * mxt_obj_instances(object);
903 if (index + size > pdata->config_length) {
904 dev_err(dev, "Not enough config data!\n");
908 ret = __mxt_write_reg(data->client, object->start_address,
909 size, &pdata->config[index]);
915 mxt_update_crc(data, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE);
917 ret = mxt_soft_reset(data);
921 dev_info(dev, "Config successfully updated\n");
926 static int mxt_make_highchg(struct mxt_data *data)
928 struct device *dev = &data->client->dev;
929 struct mxt_message message;
933 /* Read dummy message to make high CHG pin */
935 error = mxt_read_message(data, &message);
938 } while (message.reportid != 0xff && --count);
941 dev_err(dev, "CHG pin isn't cleared\n");
948 static int mxt_get_info(struct mxt_data *data)
950 struct i2c_client *client = data->client;
951 struct mxt_info *info = &data->info;
954 /* Read 7-byte info block starting at address 0 */
955 error = __mxt_read_reg(client, MXT_INFO, sizeof(*info), info);
962 static int mxt_get_object_table(struct mxt_data *data)
964 struct i2c_client *client = data->client;
970 table_size = data->info.object_num * sizeof(struct mxt_object);
971 error = __mxt_read_reg(client, MXT_OBJECT_START, table_size,
976 /* Valid Report IDs start counting from 1 */
978 for (i = 0; i < data->info.object_num; i++) {
979 struct mxt_object *object = data->object_table + i;
982 le16_to_cpus(&object->start_address);
984 if (object->num_report_ids) {
986 reportid += object->num_report_ids *
987 mxt_obj_instances(object);
988 max_id = reportid - 1;
994 dev_dbg(&data->client->dev,
995 "T%u Start:%u Size:%zu Instances:%zu Report IDs:%u-%u\n",
996 object->type, object->start_address,
997 mxt_obj_size(object), mxt_obj_instances(object),
1000 switch (object->type) {
1001 case MXT_GEN_COMMAND_T6:
1002 data->T6_reportid = min_id;
1003 data->T6_address = object->start_address;
1005 case MXT_TOUCH_MULTI_T9:
1006 data->T9_reportid_min = min_id;
1007 data->T9_reportid_max = max_id;
1009 case MXT_SPT_GPIOPWM_T19:
1010 data->T19_reportid = min_id;
1018 static void mxt_free_object_table(struct mxt_data *data)
1020 kfree(data->object_table);
1021 data->object_table = NULL;
1022 data->T6_reportid = 0;
1023 data->T9_reportid_min = 0;
1024 data->T9_reportid_max = 0;
1025 data->T19_reportid = 0;
1028 static int mxt_initialize(struct mxt_data *data)
1030 struct i2c_client *client = data->client;
1031 struct mxt_info *info = &data->info;
1035 error = mxt_get_info(data);
1039 data->object_table = kcalloc(info->object_num,
1040 sizeof(struct mxt_object),
1042 if (!data->object_table) {
1043 dev_err(&client->dev, "Failed to allocate memory\n");
1047 /* Get object table information */
1048 error = mxt_get_object_table(data);
1050 dev_err(&client->dev, "Error %d reading object table\n", error);
1051 goto err_free_object_table;
1054 /* Check register init values */
1055 error = mxt_check_reg_init(data);
1057 dev_err(&client->dev, "Error %d initializing configuration\n",
1059 goto err_free_object_table;
1062 /* Update matrix size at info struct */
1063 error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, &val);
1065 goto err_free_object_table;
1066 info->matrix_xsize = val;
1068 error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, &val);
1070 goto err_free_object_table;
1071 info->matrix_ysize = val;
1073 dev_info(&client->dev,
1074 "Family: %u Variant: %u Firmware V%u.%u.%02X\n",
1075 info->family_id, info->variant_id, info->version >> 4,
1076 info->version & 0xf, info->build);
1078 dev_info(&client->dev,
1079 "Matrix X Size: %u Matrix Y Size: %u Objects: %u\n",
1080 info->matrix_xsize, info->matrix_ysize,
1085 err_free_object_table:
1086 mxt_free_object_table(data);
1090 static void mxt_calc_resolution(struct mxt_data *data)
1092 unsigned int max_x = data->pdata->x_size - 1;
1093 unsigned int max_y = data->pdata->y_size - 1;
1095 if (data->pdata->orient & MXT_XY_SWITCH) {
1096 data->max_x = max_y;
1097 data->max_y = max_x;
1099 data->max_x = max_x;
1100 data->max_y = max_y;
1104 /* Firmware Version is returned as Major.Minor.Build */
1105 static ssize_t mxt_fw_version_show(struct device *dev,
1106 struct device_attribute *attr, char *buf)
1108 struct mxt_data *data = dev_get_drvdata(dev);
1109 struct mxt_info *info = &data->info;
1110 return scnprintf(buf, PAGE_SIZE, "%u.%u.%02X\n",
1111 info->version >> 4, info->version & 0xf, info->build);
1114 /* Hardware Version is returned as FamilyID.VariantID */
1115 static ssize_t mxt_hw_version_show(struct device *dev,
1116 struct device_attribute *attr, char *buf)
1118 struct mxt_data *data = dev_get_drvdata(dev);
1119 struct mxt_info *info = &data->info;
1120 return scnprintf(buf, PAGE_SIZE, "%u.%u\n",
1121 info->family_id, info->variant_id);
1124 static ssize_t mxt_show_instance(char *buf, int count,
1125 struct mxt_object *object, int instance,
1130 if (mxt_obj_instances(object) > 1)
1131 count += scnprintf(buf + count, PAGE_SIZE - count,
1132 "Instance %u\n", instance);
1134 for (i = 0; i < mxt_obj_size(object); i++)
1135 count += scnprintf(buf + count, PAGE_SIZE - count,
1136 "\t[%2u]: %02x (%d)\n", i, val[i], val[i]);
1137 count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
1142 static ssize_t mxt_object_show(struct device *dev,
1143 struct device_attribute *attr, char *buf)
1145 struct mxt_data *data = dev_get_drvdata(dev);
1146 struct mxt_object *object;
1152 /* Pre-allocate buffer large enough to hold max sized object. */
1153 obuf = kmalloc(256, GFP_KERNEL);
1158 for (i = 0; i < data->info.object_num; i++) {
1159 object = data->object_table + i;
1161 if (!mxt_object_readable(object->type))
1164 count += scnprintf(buf + count, PAGE_SIZE - count,
1165 "T%u:\n", object->type);
1167 for (j = 0; j < mxt_obj_instances(object); j++) {
1168 u16 size = mxt_obj_size(object);
1169 u16 addr = object->start_address + j * size;
1171 error = __mxt_read_reg(data->client, addr, size, obuf);
1175 count = mxt_show_instance(buf, count, object, j, obuf);
1181 return error ?: count;
1184 static int mxt_load_fw(struct device *dev, const char *fn)
1186 struct mxt_data *data = dev_get_drvdata(dev);
1187 const struct firmware *fw = NULL;
1188 unsigned int frame_size;
1189 unsigned int pos = 0;
1192 ret = request_firmware(&fw, fn, dev);
1194 dev_err(dev, "Unable to open firmware %s\n", fn);
1198 ret = mxt_lookup_bootloader_address(data);
1200 goto release_firmware;
1202 /* Change to the bootloader mode */
1203 data->in_bootloader = true;
1205 ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_BOOT_VALUE, false);
1207 goto release_firmware;
1209 msleep(MXT_RESET_TIME);
1211 reinit_completion(&data->bl_completion);
1213 ret = mxt_check_bootloader(data, MXT_WAITING_BOOTLOAD_CMD);
1217 /* Unlock bootloader */
1218 mxt_unlock_bootloader(data);
1220 while (pos < fw->size) {
1221 ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA);
1225 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
1227 /* We should add 2 at frame size as the the firmware data is not
1228 * included the CRC bytes.
1232 /* Write one frame to device */
1233 ret = mxt_bootloader_write(data, fw->data + pos, frame_size);
1237 ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS);
1243 dev_dbg(dev, "Updated %d bytes / %zd bytes\n", pos, fw->size);
1246 /* Wait for flash. */
1247 ret = mxt_wait_for_completion(data, &data->bl_completion,
1253 * Wait for device to reset. Some bootloader versions do not assert
1254 * the CHG line after bootloading has finished, so ignore potential
1257 mxt_wait_for_completion(data, &data->bl_completion, MXT_FW_RESET_TIME);
1259 data->in_bootloader = false;
1262 disable_irq(data->irq);
1264 release_firmware(fw);
1268 static ssize_t mxt_update_fw_store(struct device *dev,
1269 struct device_attribute *attr,
1270 const char *buf, size_t count)
1272 struct mxt_data *data = dev_get_drvdata(dev);
1275 error = mxt_load_fw(dev, MXT_FW_NAME);
1277 dev_err(dev, "The firmware update failed(%d)\n", error);
1280 dev_info(dev, "The firmware update succeeded\n");
1282 mxt_free_object_table(data);
1284 mxt_initialize(data);
1286 enable_irq(data->irq);
1288 error = mxt_make_highchg(data);
1296 static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL);
1297 static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL);
1298 static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
1299 static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
1301 static struct attribute *mxt_attrs[] = {
1302 &dev_attr_fw_version.attr,
1303 &dev_attr_hw_version.attr,
1304 &dev_attr_object.attr,
1305 &dev_attr_update_fw.attr,
1309 static const struct attribute_group mxt_attr_group = {
1313 static void mxt_start(struct mxt_data *data)
1316 mxt_write_object(data,
1317 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0x83);
1320 static void mxt_stop(struct mxt_data *data)
1323 mxt_write_object(data,
1324 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0);
1327 static int mxt_input_open(struct input_dev *dev)
1329 struct mxt_data *data = input_get_drvdata(dev);
1336 static void mxt_input_close(struct input_dev *dev)
1338 struct mxt_data *data = input_get_drvdata(dev);
1343 static int mxt_probe(struct i2c_client *client,
1344 const struct i2c_device_id *id)
1346 const struct mxt_platform_data *pdata = dev_get_platdata(&client->dev);
1347 struct mxt_data *data;
1348 struct input_dev *input_dev;
1350 unsigned int num_mt_slots;
1351 unsigned int mt_flags = 0;
1357 data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
1358 input_dev = input_allocate_device();
1359 if (!data || !input_dev) {
1360 dev_err(&client->dev, "Failed to allocate memory\n");
1365 input_dev->name = "Atmel maXTouch Touchscreen";
1366 snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
1367 client->adapter->nr, client->addr);
1369 input_dev->phys = data->phys;
1371 input_dev->id.bustype = BUS_I2C;
1372 input_dev->dev.parent = &client->dev;
1373 input_dev->open = mxt_input_open;
1374 input_dev->close = mxt_input_close;
1376 data->client = client;
1377 data->input_dev = input_dev;
1378 data->pdata = pdata;
1379 data->irq = client->irq;
1381 init_completion(&data->bl_completion);
1382 init_completion(&data->reset_completion);
1383 init_completion(&data->crc_completion);
1385 mxt_calc_resolution(data);
1387 error = mxt_initialize(data);
1391 __set_bit(EV_ABS, input_dev->evbit);
1392 __set_bit(EV_KEY, input_dev->evbit);
1393 __set_bit(BTN_TOUCH, input_dev->keybit);
1395 if (pdata->t19_num_keys) {
1396 __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
1398 for (i = 0; i < pdata->t19_num_keys; i++)
1399 if (pdata->t19_keymap[i] != KEY_RESERVED)
1400 input_set_capability(input_dev, EV_KEY,
1401 pdata->t19_keymap[i]);
1403 mt_flags |= INPUT_MT_POINTER;
1405 input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM);
1406 input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM);
1407 input_abs_set_res(input_dev, ABS_MT_POSITION_X,
1409 input_abs_set_res(input_dev, ABS_MT_POSITION_Y,
1412 input_dev->name = "Atmel maXTouch Touchpad";
1415 /* For single touch */
1416 input_set_abs_params(input_dev, ABS_X,
1417 0, data->max_x, 0, 0);
1418 input_set_abs_params(input_dev, ABS_Y,
1419 0, data->max_y, 0, 0);
1420 input_set_abs_params(input_dev, ABS_PRESSURE,
1423 /* For multi touch */
1424 num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
1425 error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags);
1427 goto err_free_object;
1428 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
1429 0, MXT_MAX_AREA, 0, 0);
1430 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
1431 0, data->max_x, 0, 0);
1432 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
1433 0, data->max_y, 0, 0);
1434 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
1437 input_set_drvdata(input_dev, data);
1438 i2c_set_clientdata(client, data);
1440 error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
1441 pdata->irqflags | IRQF_ONESHOT,
1442 client->name, data);
1444 dev_err(&client->dev, "Failed to register interrupt\n");
1445 goto err_free_object;
1448 error = mxt_make_highchg(data);
1452 error = input_register_device(input_dev);
1454 dev_err(&client->dev, "Error %d registering input device\n",
1459 error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
1461 dev_err(&client->dev, "Failure %d creating sysfs group\n",
1463 goto err_unregister_device;
1468 err_unregister_device:
1469 input_unregister_device(input_dev);
1472 free_irq(client->irq, data);
1474 kfree(data->object_table);
1476 input_free_device(input_dev);
1481 static int mxt_remove(struct i2c_client *client)
1483 struct mxt_data *data = i2c_get_clientdata(client);
1485 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
1486 free_irq(data->irq, data);
1487 input_unregister_device(data->input_dev);
1488 kfree(data->object_table);
1494 #ifdef CONFIG_PM_SLEEP
1495 static int mxt_suspend(struct device *dev)
1497 struct i2c_client *client = to_i2c_client(dev);
1498 struct mxt_data *data = i2c_get_clientdata(client);
1499 struct input_dev *input_dev = data->input_dev;
1501 mutex_lock(&input_dev->mutex);
1503 if (input_dev->users)
1506 mutex_unlock(&input_dev->mutex);
1511 static int mxt_resume(struct device *dev)
1513 struct i2c_client *client = to_i2c_client(dev);
1514 struct mxt_data *data = i2c_get_clientdata(client);
1515 struct input_dev *input_dev = data->input_dev;
1517 mxt_soft_reset(data);
1519 mutex_lock(&input_dev->mutex);
1521 if (input_dev->users)
1524 mutex_unlock(&input_dev->mutex);
1530 static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
1532 static const struct i2c_device_id mxt_id[] = {
1533 { "qt602240_ts", 0 },
1534 { "atmel_mxt_ts", 0 },
1535 { "atmel_mxt_tp", 0 },
1539 MODULE_DEVICE_TABLE(i2c, mxt_id);
1541 static struct i2c_driver mxt_driver = {
1543 .name = "atmel_mxt_ts",
1544 .owner = THIS_MODULE,
1548 .remove = mxt_remove,
1552 module_i2c_driver(mxt_driver);
1554 /* Module information */
1555 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
1556 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
1557 MODULE_LICENSE("GPL");