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/mt.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"
40 #define MXT_FAMILY_ID 0x00
41 #define MXT_VARIANT_ID 0x01
42 #define MXT_VERSION 0x02
43 #define MXT_BUILD 0x03
44 #define MXT_MATRIX_X_SIZE 0x04
45 #define MXT_MATRIX_Y_SIZE 0x05
46 #define MXT_OBJECT_NUM 0x06
47 #define MXT_OBJECT_START 0x07
49 #define MXT_OBJECT_SIZE 6
52 #define MXT_DEBUG_DIAGNOSTIC_T37 37
53 #define MXT_GEN_MESSAGE_T5 5
54 #define MXT_GEN_COMMAND_T6 6
55 #define MXT_GEN_POWER_T7 7
56 #define MXT_GEN_ACQUIRE_T8 8
57 #define MXT_GEN_DATASOURCE_T53 53
58 #define MXT_TOUCH_MULTI_T9 9
59 #define MXT_TOUCH_KEYARRAY_T15 15
60 #define MXT_TOUCH_PROXIMITY_T23 23
61 #define MXT_TOUCH_PROXKEY_T52 52
62 #define MXT_PROCI_GRIPFACE_T20 20
63 #define MXT_PROCG_NOISE_T22 22
64 #define MXT_PROCI_ONETOUCH_T24 24
65 #define MXT_PROCI_TWOTOUCH_T27 27
66 #define MXT_PROCI_GRIP_T40 40
67 #define MXT_PROCI_PALM_T41 41
68 #define MXT_PROCI_TOUCHSUPPRESSION_T42 42
69 #define MXT_PROCI_STYLUS_T47 47
70 #define MXT_PROCG_NOISESUPPRESSION_T48 48
71 #define MXT_SPT_COMMSCONFIG_T18 18
72 #define MXT_SPT_GPIOPWM_T19 19
73 #define MXT_SPT_SELFTEST_T25 25
74 #define MXT_SPT_CTECONFIG_T28 28
75 #define MXT_SPT_USERDATA_T38 38
76 #define MXT_SPT_DIGITIZER_T43 43
77 #define MXT_SPT_MESSAGECOUNT_T44 44
78 #define MXT_SPT_CTECONFIG_T46 46
80 /* MXT_GEN_COMMAND_T6 field */
81 #define MXT_COMMAND_RESET 0
82 #define MXT_COMMAND_BACKUPNV 1
83 #define MXT_COMMAND_CALIBRATE 2
84 #define MXT_COMMAND_REPORTALL 3
85 #define MXT_COMMAND_DIAGNOSTIC 5
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_BACKUP_VALUE 0x55
179 #define MXT_BACKUP_TIME 25 /* msec */
180 #define MXT_RESET_TIME 65 /* msec */
182 #define MXT_FWRESET_TIME 175 /* msec */
184 /* Command to unlock bootloader */
185 #define MXT_UNLOCK_CMD_MSB 0xaa
186 #define MXT_UNLOCK_CMD_LSB 0xdc
188 /* Bootloader mode status */
189 #define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */
190 #define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */
191 #define MXT_FRAME_CRC_CHECK 0x02
192 #define MXT_FRAME_CRC_FAIL 0x03
193 #define MXT_FRAME_CRC_PASS 0x04
194 #define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */
195 #define MXT_BOOT_STATUS_MASK 0x3f
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_MAX_FINGER 10
233 /* to map object and message */
242 /* Each client has this additional data */
244 struct i2c_client *client;
245 struct input_dev *input_dev;
246 char phys[64]; /* device physical location */
247 const struct mxt_platform_data *pdata;
248 struct mxt_object *object_table;
249 struct mxt_info info;
255 static bool mxt_object_readable(unsigned int type)
258 case MXT_GEN_COMMAND_T6:
259 case MXT_GEN_POWER_T7:
260 case MXT_GEN_ACQUIRE_T8:
261 case MXT_GEN_DATASOURCE_T53:
262 case MXT_TOUCH_MULTI_T9:
263 case MXT_TOUCH_KEYARRAY_T15:
264 case MXT_TOUCH_PROXIMITY_T23:
265 case MXT_TOUCH_PROXKEY_T52:
266 case MXT_PROCI_GRIPFACE_T20:
267 case MXT_PROCG_NOISE_T22:
268 case MXT_PROCI_ONETOUCH_T24:
269 case MXT_PROCI_TWOTOUCH_T27:
270 case MXT_PROCI_GRIP_T40:
271 case MXT_PROCI_PALM_T41:
272 case MXT_PROCI_TOUCHSUPPRESSION_T42:
273 case MXT_PROCI_STYLUS_T47:
274 case MXT_PROCG_NOISESUPPRESSION_T48:
275 case MXT_SPT_COMMSCONFIG_T18:
276 case MXT_SPT_GPIOPWM_T19:
277 case MXT_SPT_SELFTEST_T25:
278 case MXT_SPT_CTECONFIG_T28:
279 case MXT_SPT_USERDATA_T38:
280 case MXT_SPT_DIGITIZER_T43:
281 case MXT_SPT_CTECONFIG_T46:
288 static bool mxt_object_writable(unsigned int type)
291 case MXT_GEN_COMMAND_T6:
292 case MXT_GEN_POWER_T7:
293 case MXT_GEN_ACQUIRE_T8:
294 case MXT_TOUCH_MULTI_T9:
295 case MXT_TOUCH_KEYARRAY_T15:
296 case MXT_TOUCH_PROXIMITY_T23:
297 case MXT_TOUCH_PROXKEY_T52:
298 case MXT_PROCI_GRIPFACE_T20:
299 case MXT_PROCG_NOISE_T22:
300 case MXT_PROCI_ONETOUCH_T24:
301 case MXT_PROCI_TWOTOUCH_T27:
302 case MXT_PROCI_GRIP_T40:
303 case MXT_PROCI_PALM_T41:
304 case MXT_PROCI_TOUCHSUPPRESSION_T42:
305 case MXT_PROCI_STYLUS_T47:
306 case MXT_PROCG_NOISESUPPRESSION_T48:
307 case MXT_SPT_COMMSCONFIG_T18:
308 case MXT_SPT_GPIOPWM_T19:
309 case MXT_SPT_SELFTEST_T25:
310 case MXT_SPT_CTECONFIG_T28:
311 case MXT_SPT_DIGITIZER_T43:
312 case MXT_SPT_CTECONFIG_T46:
319 static void mxt_dump_message(struct device *dev,
320 struct mxt_message *message)
322 dev_dbg(dev, "reportid: %u\tmessage: %02x %02x %02x %02x %02x %02x %02x\n",
323 message->reportid, message->message[0], message->message[1],
324 message->message[2], message->message[3], message->message[4],
325 message->message[5], message->message[6]);
328 static int mxt_check_bootloader(struct i2c_client *client,
334 if (i2c_master_recv(client, &val, 1) != 1) {
335 dev_err(&client->dev, "%s: i2c recv failed\n", __func__);
340 case MXT_WAITING_BOOTLOAD_CMD:
341 case MXT_WAITING_FRAME_DATA:
342 val &= ~MXT_BOOT_STATUS_MASK;
344 case MXT_FRAME_CRC_PASS:
345 if (val == MXT_FRAME_CRC_CHECK)
353 dev_err(&client->dev, "Unvalid bootloader mode state\n");
360 static int mxt_unlock_bootloader(struct i2c_client *client)
364 buf[0] = MXT_UNLOCK_CMD_LSB;
365 buf[1] = MXT_UNLOCK_CMD_MSB;
367 if (i2c_master_send(client, buf, 2) != 2) {
368 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
375 static int mxt_fw_write(struct i2c_client *client,
376 const u8 *data, unsigned int frame_size)
378 if (i2c_master_send(client, data, frame_size) != frame_size) {
379 dev_err(&client->dev, "%s: i2c send failed\n", __func__);
386 static int __mxt_read_reg(struct i2c_client *client,
387 u16 reg, u16 len, void *val)
389 struct i2c_msg xfer[2];
394 buf[1] = (reg >> 8) & 0xff;
397 xfer[0].addr = client->addr;
403 xfer[1].addr = client->addr;
404 xfer[1].flags = I2C_M_RD;
408 ret = i2c_transfer(client->adapter, xfer, 2);
414 dev_err(&client->dev, "%s: i2c transfer failed (%d)\n",
421 static int mxt_read_reg(struct i2c_client *client, u16 reg, u8 *val)
423 return __mxt_read_reg(client, reg, 1, val);
426 static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
434 buf = kmalloc(count, GFP_KERNEL);
439 buf[1] = (reg >> 8) & 0xff;
440 memcpy(&buf[2], val, len);
442 ret = i2c_master_send(client, buf, count);
448 dev_err(&client->dev, "%s: i2c send failed (%d)\n",
456 static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
458 return __mxt_write_reg(client, reg, 1, &val);
461 static int mxt_read_object_table(struct i2c_client *client,
462 u16 reg, u8 *object_buf)
464 return __mxt_read_reg(client, reg, MXT_OBJECT_SIZE,
468 static struct mxt_object *
469 mxt_get_object(struct mxt_data *data, u8 type)
471 struct mxt_object *object;
474 for (i = 0; i < data->info.object_num; i++) {
475 object = data->object_table + i;
476 if (object->type == type)
480 dev_err(&data->client->dev, "Invalid object type\n");
484 static int mxt_read_message(struct mxt_data *data,
485 struct mxt_message *message)
487 struct mxt_object *object;
490 object = mxt_get_object(data, MXT_GEN_MESSAGE_T5);
494 reg = object->start_address;
495 return __mxt_read_reg(data->client, reg,
496 sizeof(struct mxt_message), message);
499 static int mxt_write_object(struct mxt_data *data,
500 u8 type, u8 offset, u8 val)
502 struct mxt_object *object;
505 object = mxt_get_object(data, type);
506 if (!object || offset >= object->size + 1)
509 reg = object->start_address;
510 return mxt_write_reg(data->client, reg + offset, val);
513 static void mxt_input_touchevent(struct mxt_data *data,
514 struct mxt_message *message, int id)
516 struct device *dev = &data->client->dev;
517 u8 status = message->message[0];
518 struct input_dev *input_dev = data->input_dev;
524 x = (message->message[1] << 4) | ((message->message[3] >> 4) & 0xf);
525 y = (message->message[2] << 4) | ((message->message[3] & 0xf));
526 if (data->max_x < 1024)
528 if (data->max_y < 1024)
531 area = message->message[4];
532 pressure = message->message[5];
534 dev_dbg(dev, "[%d] %s x: %d, y: %d, area: %d\n", id,
535 status & MXT_MOVE ? "moved" : "pressed",
537 input_mt_slot(input_dev, id);
538 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER,
539 status & MXT_DETECT);
541 if (status & MXT_DETECT) {
542 input_report_abs(input_dev, ABS_MT_POSITION_X, x);
543 input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
544 input_report_abs(input_dev, ABS_MT_PRESSURE, pressure);
545 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area);
548 input_mt_report_pointer_emulation(input_dev, false);
549 input_sync(input_dev);
552 static irqreturn_t mxt_interrupt(int irq, void *dev_id)
554 struct mxt_data *data = dev_id;
555 struct mxt_message message;
556 struct mxt_object *object;
557 struct device *dev = &data->client->dev;
564 if (mxt_read_message(data, &message)) {
565 dev_err(dev, "Failed to read message\n");
569 reportid = message.reportid;
571 /* whether reportid is thing of MXT_TOUCH_MULTI_T9 */
572 object = mxt_get_object(data, MXT_TOUCH_MULTI_T9);
576 max_reportid = object->max_reportid;
577 min_reportid = max_reportid - object->num_report_ids + 1;
578 id = reportid - min_reportid;
580 if (reportid >= min_reportid && reportid <= max_reportid)
581 mxt_input_touchevent(data, &message, id);
583 mxt_dump_message(dev, &message);
584 } while (reportid != 0xff);
590 static int mxt_check_reg_init(struct mxt_data *data)
592 const struct mxt_platform_data *pdata = data->pdata;
593 struct mxt_object *object;
594 struct device *dev = &data->client->dev;
599 if (!pdata->config) {
600 dev_dbg(dev, "No cfg data defined, skipping reg init\n");
604 for (i = 0; i < data->info.object_num; i++) {
605 object = data->object_table + i;
607 if (!mxt_object_writable(object->type))
610 size = (object->size + 1) * (object->instances + 1);
611 if (index + size > pdata->config_length) {
612 dev_err(dev, "Not enough config data!\n");
616 ret = __mxt_write_reg(data->client, object->start_address,
617 size, &pdata->config[index]);
626 static int mxt_make_highchg(struct mxt_data *data)
628 struct device *dev = &data->client->dev;
629 struct mxt_message message;
633 /* Read dummy message to make high CHG pin */
635 error = mxt_read_message(data, &message);
638 } while (message.reportid != 0xff && --count);
641 dev_err(dev, "CHG pin isn't cleared\n");
648 static void mxt_handle_pdata(struct mxt_data *data)
650 const struct mxt_platform_data *pdata = data->pdata;
653 /* Set touchscreen lines */
654 mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_XSIZE,
656 mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_YSIZE,
659 /* Set touchscreen orient */
660 mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_ORIENT,
663 /* Set touchscreen burst length */
664 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
665 MXT_TOUCH_BLEN, pdata->blen);
667 /* Set touchscreen threshold */
668 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
669 MXT_TOUCH_TCHTHR, pdata->threshold);
671 /* Set touchscreen resolution */
672 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
673 MXT_TOUCH_XRANGE_LSB, (pdata->x_size - 1) & 0xff);
674 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
675 MXT_TOUCH_XRANGE_MSB, (pdata->x_size - 1) >> 8);
676 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
677 MXT_TOUCH_YRANGE_LSB, (pdata->y_size - 1) & 0xff);
678 mxt_write_object(data, MXT_TOUCH_MULTI_T9,
679 MXT_TOUCH_YRANGE_MSB, (pdata->y_size - 1) >> 8);
681 /* Set touchscreen voltage */
682 if (pdata->voltage) {
683 if (pdata->voltage < MXT_VOLTAGE_DEFAULT) {
684 voltage = (MXT_VOLTAGE_DEFAULT - pdata->voltage) /
686 voltage = 0xff - voltage + 1;
688 voltage = (pdata->voltage - MXT_VOLTAGE_DEFAULT) /
691 mxt_write_object(data, MXT_SPT_CTECONFIG_T28,
692 MXT_CTE_VOLTAGE, voltage);
696 static int mxt_get_info(struct mxt_data *data)
698 struct i2c_client *client = data->client;
699 struct mxt_info *info = &data->info;
702 /* Read 7-byte info block starting at address 0 */
703 error = __mxt_read_reg(client, MXT_INFO, sizeof(*info), info);
710 static int mxt_get_object_table(struct mxt_data *data)
716 u8 buf[MXT_OBJECT_SIZE];
718 for (i = 0; i < data->info.object_num; i++) {
719 struct mxt_object *object = data->object_table + i;
721 reg = MXT_OBJECT_START + MXT_OBJECT_SIZE * i;
722 error = mxt_read_object_table(data->client, reg, buf);
726 object->type = buf[0];
727 object->start_address = (buf[2] << 8) | buf[1];
728 object->size = buf[3];
729 object->instances = buf[4];
730 object->num_report_ids = buf[5];
732 if (object->num_report_ids) {
733 reportid += object->num_report_ids *
734 (object->instances + 1);
735 object->max_reportid = reportid;
742 static int mxt_initialize(struct mxt_data *data)
744 struct i2c_client *client = data->client;
745 struct mxt_info *info = &data->info;
749 error = mxt_get_info(data);
753 data->object_table = kcalloc(info->object_num,
754 sizeof(struct mxt_object),
756 if (!data->object_table) {
757 dev_err(&client->dev, "Failed to allocate memory\n");
761 /* Get object table information */
762 error = mxt_get_object_table(data);
766 /* Check register init values */
767 error = mxt_check_reg_init(data);
771 mxt_handle_pdata(data);
773 /* Backup to memory */
774 mxt_write_object(data, MXT_GEN_COMMAND_T6,
775 MXT_COMMAND_BACKUPNV,
777 msleep(MXT_BACKUP_TIME);
780 mxt_write_object(data, MXT_GEN_COMMAND_T6,
781 MXT_COMMAND_RESET, 1);
782 msleep(MXT_RESET_TIME);
784 /* Update matrix size at info struct */
785 error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, &val);
788 info->matrix_xsize = val;
790 error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, &val);
793 info->matrix_ysize = val;
795 dev_info(&client->dev,
796 "Family ID: %u Variant ID: %u Major.Minor.Build: %u.%u.%02X\n",
797 info->family_id, info->variant_id, info->version >> 4,
798 info->version & 0xf, info->build);
800 dev_info(&client->dev,
801 "Matrix X Size: %u Matrix Y Size: %u Object Num: %u\n",
802 info->matrix_xsize, info->matrix_ysize,
808 static void mxt_calc_resolution(struct mxt_data *data)
810 unsigned int max_x = data->pdata->x_size - 1;
811 unsigned int max_y = data->pdata->y_size - 1;
813 if (data->pdata->orient & MXT_XY_SWITCH) {
822 /* Firmware Version is returned as Major.Minor.Build */
823 static ssize_t mxt_fw_version_show(struct device *dev,
824 struct device_attribute *attr, char *buf)
826 struct mxt_data *data = dev_get_drvdata(dev);
827 struct mxt_info *info = &data->info;
828 return scnprintf(buf, PAGE_SIZE, "%u.%u.%02X\n",
829 info->version >> 4, info->version & 0xf, info->build);
832 /* Hardware Version is returned as FamilyID.VariantID */
833 static ssize_t mxt_hw_version_show(struct device *dev,
834 struct device_attribute *attr, char *buf)
836 struct mxt_data *data = dev_get_drvdata(dev);
837 struct mxt_info *info = &data->info;
838 return scnprintf(buf, PAGE_SIZE, "%u.%u\n",
839 info->family_id, info->variant_id);
842 static ssize_t mxt_show_instance(char *buf, int count,
843 struct mxt_object *object, int instance,
848 if (object->instances > 0)
849 count += scnprintf(buf + count, PAGE_SIZE - count,
850 "Instance %u\n", instance);
852 for (i = 0; i < object->size + 1; i++)
853 count += scnprintf(buf + count, PAGE_SIZE - count,
854 "\t[%2u]: %02x (%d)\n", i, val[i], val[i]);
855 count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
860 static ssize_t mxt_object_show(struct device *dev,
861 struct device_attribute *attr, char *buf)
863 struct mxt_data *data = dev_get_drvdata(dev);
864 struct mxt_object *object;
870 /* Pre-allocate buffer large enough to hold max sized object. */
871 obuf = kmalloc(256, GFP_KERNEL);
876 for (i = 0; i < data->info.object_num; i++) {
877 object = data->object_table + i;
879 if (!mxt_object_readable(object->type))
882 count += scnprintf(buf + count, PAGE_SIZE - count,
883 "T%u:\n", object->type);
885 for (j = 0; j < object->instances + 1; j++) {
886 u16 size = object->size + 1;
887 u16 addr = object->start_address + j * size;
889 error = __mxt_read_reg(data->client, addr, size, obuf);
893 count = mxt_show_instance(buf, count, object, j, obuf);
899 return error ?: count;
902 static int mxt_load_fw(struct device *dev, const char *fn)
904 struct mxt_data *data = dev_get_drvdata(dev);
905 struct i2c_client *client = data->client;
906 const struct firmware *fw = NULL;
907 unsigned int frame_size;
908 unsigned int pos = 0;
911 ret = request_firmware(&fw, fn, dev);
913 dev_err(dev, "Unable to open firmware %s\n", fn);
917 /* Change to the bootloader mode */
918 mxt_write_object(data, MXT_GEN_COMMAND_T6,
919 MXT_COMMAND_RESET, MXT_BOOT_VALUE);
920 msleep(MXT_RESET_TIME);
922 /* Change to slave address of bootloader */
923 if (client->addr == MXT_APP_LOW)
924 client->addr = MXT_BOOT_LOW;
926 client->addr = MXT_BOOT_HIGH;
928 ret = mxt_check_bootloader(client, MXT_WAITING_BOOTLOAD_CMD);
932 /* Unlock bootloader */
933 mxt_unlock_bootloader(client);
935 while (pos < fw->size) {
936 ret = mxt_check_bootloader(client,
937 MXT_WAITING_FRAME_DATA);
941 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
943 /* We should add 2 at frame size as the the firmware data is not
944 * included the CRC bytes.
948 /* Write one frame to device */
949 mxt_fw_write(client, fw->data + pos, frame_size);
951 ret = mxt_check_bootloader(client,
958 dev_dbg(dev, "Updated %d bytes / %zd bytes\n", pos, fw->size);
962 release_firmware(fw);
964 /* Change to slave address of application */
965 if (client->addr == MXT_BOOT_LOW)
966 client->addr = MXT_APP_LOW;
968 client->addr = MXT_APP_HIGH;
973 static ssize_t mxt_update_fw_store(struct device *dev,
974 struct device_attribute *attr,
975 const char *buf, size_t count)
977 struct mxt_data *data = dev_get_drvdata(dev);
980 disable_irq(data->irq);
982 error = mxt_load_fw(dev, MXT_FW_NAME);
984 dev_err(dev, "The firmware update failed(%d)\n", error);
987 dev_dbg(dev, "The firmware update succeeded\n");
990 msleep(MXT_FWRESET_TIME);
992 kfree(data->object_table);
993 data->object_table = NULL;
995 mxt_initialize(data);
998 enable_irq(data->irq);
1000 error = mxt_make_highchg(data);
1007 static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL);
1008 static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL);
1009 static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
1010 static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
1012 static struct attribute *mxt_attrs[] = {
1013 &dev_attr_fw_version.attr,
1014 &dev_attr_hw_version.attr,
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_T9, MXT_TOUCH_CTRL, 0x83);
1031 static void mxt_stop(struct mxt_data *data)
1034 mxt_write_object(data,
1035 MXT_TOUCH_MULTI_T9, 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 snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
1075 client->adapter->nr, client->addr);
1076 input_dev->phys = data->phys;
1078 input_dev->id.bustype = BUS_I2C;
1079 input_dev->dev.parent = &client->dev;
1080 input_dev->open = mxt_input_open;
1081 input_dev->close = mxt_input_close;
1083 data->client = client;
1084 data->input_dev = input_dev;
1085 data->pdata = pdata;
1086 data->irq = client->irq;
1088 mxt_calc_resolution(data);
1090 __set_bit(EV_ABS, input_dev->evbit);
1091 __set_bit(EV_KEY, input_dev->evbit);
1092 __set_bit(BTN_TOUCH, input_dev->keybit);
1094 /* For single touch */
1095 input_set_abs_params(input_dev, ABS_X,
1096 0, data->max_x, 0, 0);
1097 input_set_abs_params(input_dev, ABS_Y,
1098 0, data->max_y, 0, 0);
1099 input_set_abs_params(input_dev, ABS_PRESSURE,
1102 /* For multi touch */
1103 error = input_mt_init_slots(input_dev, MXT_MAX_FINGER);
1106 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
1107 0, MXT_MAX_AREA, 0, 0);
1108 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
1109 0, data->max_x, 0, 0);
1110 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
1111 0, data->max_y, 0, 0);
1112 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
1115 input_set_drvdata(input_dev, data);
1116 i2c_set_clientdata(client, data);
1118 error = mxt_initialize(data);
1120 goto err_free_object;
1122 error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
1123 pdata->irqflags, client->name, data);
1125 dev_err(&client->dev, "Failed to register interrupt\n");
1126 goto err_free_object;
1129 error = mxt_make_highchg(data);
1133 error = input_register_device(input_dev);
1137 error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
1139 dev_warn(&client->dev, "error creating sysfs entries.\n");
1144 free_irq(client->irq, data);
1146 kfree(data->object_table);
1148 input_free_device(input_dev);
1153 static int __devexit mxt_remove(struct i2c_client *client)
1155 struct mxt_data *data = i2c_get_clientdata(client);
1157 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
1158 free_irq(data->irq, data);
1159 input_unregister_device(data->input_dev);
1160 kfree(data->object_table);
1166 #ifdef CONFIG_PM_SLEEP
1167 static int mxt_suspend(struct device *dev)
1169 struct i2c_client *client = to_i2c_client(dev);
1170 struct mxt_data *data = i2c_get_clientdata(client);
1171 struct input_dev *input_dev = data->input_dev;
1173 mutex_lock(&input_dev->mutex);
1175 if (input_dev->users)
1178 mutex_unlock(&input_dev->mutex);
1183 static int mxt_resume(struct device *dev)
1185 struct i2c_client *client = to_i2c_client(dev);
1186 struct mxt_data *data = i2c_get_clientdata(client);
1187 struct input_dev *input_dev = data->input_dev;
1190 mxt_write_object(data, MXT_GEN_COMMAND_T6,
1191 MXT_COMMAND_RESET, 1);
1193 msleep(MXT_RESET_TIME);
1195 mutex_lock(&input_dev->mutex);
1197 if (input_dev->users)
1200 mutex_unlock(&input_dev->mutex);
1206 static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
1208 static const struct i2c_device_id mxt_id[] = {
1209 { "qt602240_ts", 0 },
1210 { "atmel_mxt_ts", 0 },
1214 MODULE_DEVICE_TABLE(i2c, mxt_id);
1216 static struct i2c_driver mxt_driver = {
1218 .name = "atmel_mxt_ts",
1219 .owner = THIS_MODULE,
1223 .remove = __devexit_p(mxt_remove),
1227 module_i2c_driver(mxt_driver);
1229 /* Module information */
1230 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
1231 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
1232 MODULE_LICENSE("GPL");