2 * Atmel maXTouch Touchscreen driver
4 * Copyright (C) 2010 Samsung Electronics Co.Ltd
5 * Copyright (C) 2011-2014 Atmel Corporation
6 * Copyright (C) 2012 Google, Inc.
8 * Author: Joonyoung Shim <jy0922.shim@samsung.com>
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
17 #include <linux/acpi.h>
18 #include <linux/dmi.h>
19 #include <linux/module.h>
20 #include <linux/init.h>
21 #include <linux/completion.h>
22 #include <linux/delay.h>
23 #include <linux/firmware.h>
24 #include <linux/i2c.h>
25 #include <linux/platform_data/atmel_mxt_ts.h>
26 #include <linux/input/mt.h>
27 #include <linux/interrupt.h>
29 #include <linux/slab.h>
30 #include <asm/unaligned.h>
33 #define MXT_FW_NAME "maxtouch.fw"
34 #define MXT_CFG_NAME "maxtouch.cfg"
35 #define MXT_CFG_MAGIC "OBP_RAW V1"
38 #define MXT_OBJECT_START 0x07
39 #define MXT_OBJECT_SIZE 6
40 #define MXT_INFO_CHECKSUM_SIZE 3
41 #define MXT_MAX_BLOCK_WRITE 256
44 #define MXT_DEBUG_DIAGNOSTIC_T37 37
45 #define MXT_GEN_MESSAGE_T5 5
46 #define MXT_GEN_COMMAND_T6 6
47 #define MXT_GEN_POWER_T7 7
48 #define MXT_GEN_ACQUIRE_T8 8
49 #define MXT_GEN_DATASOURCE_T53 53
50 #define MXT_TOUCH_MULTI_T9 9
51 #define MXT_TOUCH_KEYARRAY_T15 15
52 #define MXT_TOUCH_PROXIMITY_T23 23
53 #define MXT_TOUCH_PROXKEY_T52 52
54 #define MXT_PROCI_GRIPFACE_T20 20
55 #define MXT_PROCG_NOISE_T22 22
56 #define MXT_PROCI_ONETOUCH_T24 24
57 #define MXT_PROCI_TWOTOUCH_T27 27
58 #define MXT_PROCI_GRIP_T40 40
59 #define MXT_PROCI_PALM_T41 41
60 #define MXT_PROCI_TOUCHSUPPRESSION_T42 42
61 #define MXT_PROCI_STYLUS_T47 47
62 #define MXT_PROCG_NOISESUPPRESSION_T48 48
63 #define MXT_SPT_COMMSCONFIG_T18 18
64 #define MXT_SPT_GPIOPWM_T19 19
65 #define MXT_SPT_SELFTEST_T25 25
66 #define MXT_SPT_CTECONFIG_T28 28
67 #define MXT_SPT_USERDATA_T38 38
68 #define MXT_SPT_DIGITIZER_T43 43
69 #define MXT_SPT_MESSAGECOUNT_T44 44
70 #define MXT_SPT_CTECONFIG_T46 46
71 #define MXT_TOUCH_MULTITOUCHSCREEN_T100 100
73 /* MXT_GEN_MESSAGE_T5 object */
74 #define MXT_RPTID_NOMSG 0xff
76 /* MXT_GEN_COMMAND_T6 field */
77 #define MXT_COMMAND_RESET 0
78 #define MXT_COMMAND_BACKUPNV 1
79 #define MXT_COMMAND_CALIBRATE 2
80 #define MXT_COMMAND_REPORTALL 3
81 #define MXT_COMMAND_DIAGNOSTIC 5
83 /* Define for T6 status byte */
84 #define MXT_T6_STATUS_RESET (1 << 7)
85 #define MXT_T6_STATUS_OFL (1 << 6)
86 #define MXT_T6_STATUS_SIGERR (1 << 5)
87 #define MXT_T6_STATUS_CAL (1 << 4)
88 #define MXT_T6_STATUS_CFGERR (1 << 3)
89 #define MXT_T6_STATUS_COMSERR (1 << 2)
91 /* MXT_GEN_POWER_T7 field */
97 #define MXT_POWER_CFG_RUN 0
98 #define MXT_POWER_CFG_DEEPSLEEP 1
100 /* MXT_TOUCH_MULTI_T9 field */
101 #define MXT_T9_CTRL 0
102 #define MXT_T9_ORIENT 9
103 #define MXT_T9_RANGE 18
105 /* MXT_TOUCH_MULTI_T9 status */
106 #define MXT_T9_UNGRIP (1 << 0)
107 #define MXT_T9_SUPPRESS (1 << 1)
108 #define MXT_T9_AMP (1 << 2)
109 #define MXT_T9_VECTOR (1 << 3)
110 #define MXT_T9_MOVE (1 << 4)
111 #define MXT_T9_RELEASE (1 << 5)
112 #define MXT_T9_PRESS (1 << 6)
113 #define MXT_T9_DETECT (1 << 7)
120 /* MXT_TOUCH_MULTI_T9 orient */
121 #define MXT_T9_ORIENT_SWITCH (1 << 0)
123 /* MXT_SPT_COMMSCONFIG_T18 */
124 #define MXT_COMMS_CTRL 0
125 #define MXT_COMMS_CMD 1
127 /* Define for MXT_GEN_COMMAND_T6 */
128 #define MXT_BOOT_VALUE 0xa5
129 #define MXT_RESET_VALUE 0x01
130 #define MXT_BACKUP_VALUE 0x55
132 /* T100 Multiple Touch Touchscreen */
133 #define MXT_T100_CTRL 0
134 #define MXT_T100_CFG1 1
135 #define MXT_T100_TCHAUX 3
136 #define MXT_T100_XRANGE 13
137 #define MXT_T100_YRANGE 24
139 #define MXT_T100_CFG_SWITCHXY BIT(5)
141 #define MXT_T100_TCHAUX_VECT BIT(0)
142 #define MXT_T100_TCHAUX_AMPL BIT(1)
143 #define MXT_T100_TCHAUX_AREA BIT(2)
145 #define MXT_T100_DETECT BIT(7)
146 #define MXT_T100_TYPE_MASK 0x70
149 MXT_T100_TYPE_FINGER = 1,
150 MXT_T100_TYPE_PASSIVE_STYLUS = 2,
151 MXT_T100_TYPE_HOVERING_FINGER = 4,
152 MXT_T100_TYPE_GLOVE = 5,
153 MXT_T100_TYPE_LARGE_TOUCH = 6,
156 #define MXT_DISTANCE_ACTIVE_TOUCH 0
157 #define MXT_DISTANCE_HOVERING 1
159 #define MXT_TOUCH_MAJOR_DEFAULT 1
160 #define MXT_PRESSURE_DEFAULT 1
163 #define MXT_BACKUP_TIME 50 /* msec */
164 #define MXT_RESET_TIME 200 /* msec */
165 #define MXT_RESET_TIMEOUT 3000 /* msec */
166 #define MXT_CRC_TIMEOUT 1000 /* msec */
167 #define MXT_FW_RESET_TIME 3000 /* msec */
168 #define MXT_FW_CHG_TIMEOUT 300 /* msec */
170 /* Command to unlock bootloader */
171 #define MXT_UNLOCK_CMD_MSB 0xaa
172 #define MXT_UNLOCK_CMD_LSB 0xdc
174 /* Bootloader mode status */
175 #define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */
176 #define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */
177 #define MXT_FRAME_CRC_CHECK 0x02
178 #define MXT_FRAME_CRC_FAIL 0x03
179 #define MXT_FRAME_CRC_PASS 0x04
180 #define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */
181 #define MXT_BOOT_STATUS_MASK 0x3f
182 #define MXT_BOOT_EXTENDED_ID (1 << 5)
183 #define MXT_BOOT_ID_MASK 0x1f
185 /* Touchscreen absolute values */
186 #define MXT_MAX_AREA 0xff
188 #define MXT_PIXELS_PER_MM 20
204 u8 instances_minus_one;
208 /* Each client has this additional data */
210 struct i2c_client *client;
211 struct input_dev *input_dev;
212 char phys[64]; /* device physical location */
213 const struct mxt_platform_data *pdata;
214 struct mxt_object *object_table;
215 struct mxt_info info;
231 u8 last_message_count;
234 struct t7_config t7_cfg;
236 /* Cached parameters from object table */
246 u8 T100_reportid_min;
247 u8 T100_reportid_max;
249 /* for fw update in bootloader */
250 struct completion bl_completion;
252 /* for reset handling */
253 struct completion reset_completion;
255 /* for config update handling */
256 struct completion crc_completion;
259 static size_t mxt_obj_size(const struct mxt_object *obj)
261 return obj->size_minus_one + 1;
264 static size_t mxt_obj_instances(const struct mxt_object *obj)
266 return obj->instances_minus_one + 1;
269 static bool mxt_object_readable(unsigned int type)
272 case MXT_GEN_COMMAND_T6:
273 case MXT_GEN_POWER_T7:
274 case MXT_GEN_ACQUIRE_T8:
275 case MXT_GEN_DATASOURCE_T53:
276 case MXT_TOUCH_MULTI_T9:
277 case MXT_TOUCH_KEYARRAY_T15:
278 case MXT_TOUCH_PROXIMITY_T23:
279 case MXT_TOUCH_PROXKEY_T52:
280 case MXT_PROCI_GRIPFACE_T20:
281 case MXT_PROCG_NOISE_T22:
282 case MXT_PROCI_ONETOUCH_T24:
283 case MXT_PROCI_TWOTOUCH_T27:
284 case MXT_PROCI_GRIP_T40:
285 case MXT_PROCI_PALM_T41:
286 case MXT_PROCI_TOUCHSUPPRESSION_T42:
287 case MXT_PROCI_STYLUS_T47:
288 case MXT_PROCG_NOISESUPPRESSION_T48:
289 case MXT_SPT_COMMSCONFIG_T18:
290 case MXT_SPT_GPIOPWM_T19:
291 case MXT_SPT_SELFTEST_T25:
292 case MXT_SPT_CTECONFIG_T28:
293 case MXT_SPT_USERDATA_T38:
294 case MXT_SPT_DIGITIZER_T43:
295 case MXT_SPT_CTECONFIG_T46:
302 static void mxt_dump_message(struct mxt_data *data, u8 *message)
304 dev_dbg(&data->client->dev, "message: %*ph\n",
305 data->T5_msg_size, message);
308 static int mxt_wait_for_completion(struct mxt_data *data,
309 struct completion *comp,
310 unsigned int timeout_ms)
312 struct device *dev = &data->client->dev;
313 unsigned long timeout = msecs_to_jiffies(timeout_ms);
316 ret = wait_for_completion_interruptible_timeout(comp, timeout);
319 } else if (ret == 0) {
320 dev_err(dev, "Wait for completion timed out.\n");
326 static int mxt_bootloader_read(struct mxt_data *data,
327 u8 *val, unsigned int count)
332 msg.addr = data->bootloader_addr;
333 msg.flags = data->client->flags & I2C_M_TEN;
334 msg.flags |= I2C_M_RD;
338 ret = i2c_transfer(data->client->adapter, &msg, 1);
342 ret = ret < 0 ? ret : -EIO;
343 dev_err(&data->client->dev, "%s: i2c recv failed (%d)\n",
350 static int mxt_bootloader_write(struct mxt_data *data,
351 const u8 * const val, unsigned int count)
356 msg.addr = data->bootloader_addr;
357 msg.flags = data->client->flags & I2C_M_TEN;
361 ret = i2c_transfer(data->client->adapter, &msg, 1);
365 ret = ret < 0 ? ret : -EIO;
366 dev_err(&data->client->dev, "%s: i2c send failed (%d)\n",
373 static int mxt_lookup_bootloader_address(struct mxt_data *data, bool retry)
375 u8 appmode = data->client->addr;
381 /* Chips after 1664S use different scheme */
382 if (retry || data->info.family_id >= 0xa2) {
383 bootloader = appmode - 0x24;
386 /* Fall through for normal case */
391 bootloader = appmode - 0x26;
395 dev_err(&data->client->dev,
396 "Appmode i2c address 0x%02x not found\n",
401 data->bootloader_addr = bootloader;
405 static int mxt_probe_bootloader(struct mxt_data *data, bool alt_address)
407 struct device *dev = &data->client->dev;
412 error = mxt_lookup_bootloader_address(data, alt_address);
416 error = mxt_bootloader_read(data, &val, 1);
420 /* Check app crc fail mode */
421 crc_failure = (val & ~MXT_BOOT_STATUS_MASK) == MXT_APP_CRC_FAIL;
423 dev_err(dev, "Detected bootloader, status:%02X%s\n",
424 val, crc_failure ? ", APP_CRC_FAIL" : "");
429 static u8 mxt_get_bootloader_version(struct mxt_data *data, u8 val)
431 struct device *dev = &data->client->dev;
434 if (val & MXT_BOOT_EXTENDED_ID) {
435 if (mxt_bootloader_read(data, &buf[0], 3) != 0) {
436 dev_err(dev, "%s: i2c failure\n", __func__);
440 dev_dbg(dev, "Bootloader ID:%d Version:%d\n", buf[1], buf[2]);
444 dev_dbg(dev, "Bootloader ID:%d\n", val & MXT_BOOT_ID_MASK);
450 static int mxt_check_bootloader(struct mxt_data *data, unsigned int state,
453 struct device *dev = &data->client->dev;
460 * In application update mode, the interrupt
461 * line signals state transitions. We must wait for the
462 * CHG assertion before reading the status byte.
463 * Once the status byte has been read, the line is deasserted.
465 ret = mxt_wait_for_completion(data, &data->bl_completion,
469 * TODO: handle -ERESTARTSYS better by terminating
470 * fw update process before returning to userspace
471 * by writing length 0x000 to device (iff we are in
472 * WAITING_FRAME_DATA state).
474 dev_err(dev, "Update wait error %d\n", ret);
479 ret = mxt_bootloader_read(data, &val, 1);
483 if (state == MXT_WAITING_BOOTLOAD_CMD)
484 val = mxt_get_bootloader_version(data, val);
487 case MXT_WAITING_BOOTLOAD_CMD:
488 case MXT_WAITING_FRAME_DATA:
489 case MXT_APP_CRC_FAIL:
490 val &= ~MXT_BOOT_STATUS_MASK;
492 case MXT_FRAME_CRC_PASS:
493 if (val == MXT_FRAME_CRC_CHECK) {
495 } else if (val == MXT_FRAME_CRC_FAIL) {
496 dev_err(dev, "Bootloader CRC fail\n");
505 dev_err(dev, "Invalid bootloader state %02X != %02X\n",
513 static int mxt_send_bootloader_cmd(struct mxt_data *data, bool unlock)
519 buf[0] = MXT_UNLOCK_CMD_LSB;
520 buf[1] = MXT_UNLOCK_CMD_MSB;
526 ret = mxt_bootloader_write(data, buf, 2);
533 static int __mxt_read_reg(struct i2c_client *client,
534 u16 reg, u16 len, void *val)
536 struct i2c_msg xfer[2];
541 buf[1] = (reg >> 8) & 0xff;
544 xfer[0].addr = client->addr;
550 xfer[1].addr = client->addr;
551 xfer[1].flags = I2C_M_RD;
555 ret = i2c_transfer(client->adapter, xfer, 2);
561 dev_err(&client->dev, "%s: i2c transfer failed (%d)\n",
568 static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
576 buf = kmalloc(count, GFP_KERNEL);
581 buf[1] = (reg >> 8) & 0xff;
582 memcpy(&buf[2], val, len);
584 ret = i2c_master_send(client, buf, count);
590 dev_err(&client->dev, "%s: i2c send failed (%d)\n",
598 static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
600 return __mxt_write_reg(client, reg, 1, &val);
603 static struct mxt_object *
604 mxt_get_object(struct mxt_data *data, u8 type)
606 struct mxt_object *object;
609 for (i = 0; i < data->info.object_num; i++) {
610 object = data->object_table + i;
611 if (object->type == type)
615 dev_warn(&data->client->dev, "Invalid object type T%u\n", type);
619 static void mxt_proc_t6_messages(struct mxt_data *data, u8 *msg)
621 struct device *dev = &data->client->dev;
623 u32 crc = msg[2] | (msg[3] << 8) | (msg[4] << 16);
625 complete(&data->crc_completion);
627 if (crc != data->config_crc) {
628 data->config_crc = crc;
629 dev_dbg(dev, "T6 Config Checksum: 0x%06X\n", crc);
633 if (status & MXT_T6_STATUS_RESET)
634 complete(&data->reset_completion);
636 /* Output debug if status has changed */
637 if (status != data->t6_status)
638 dev_dbg(dev, "T6 Status 0x%02X%s%s%s%s%s%s%s\n",
640 status == 0 ? " OK" : "",
641 status & MXT_T6_STATUS_RESET ? " RESET" : "",
642 status & MXT_T6_STATUS_OFL ? " OFL" : "",
643 status & MXT_T6_STATUS_SIGERR ? " SIGERR" : "",
644 status & MXT_T6_STATUS_CAL ? " CAL" : "",
645 status & MXT_T6_STATUS_CFGERR ? " CFGERR" : "",
646 status & MXT_T6_STATUS_COMSERR ? " COMSERR" : "");
648 /* Save current status */
649 data->t6_status = status;
652 static int mxt_write_object(struct mxt_data *data,
653 u8 type, u8 offset, u8 val)
655 struct mxt_object *object;
658 object = mxt_get_object(data, type);
659 if (!object || offset >= mxt_obj_size(object))
662 reg = object->start_address;
663 return mxt_write_reg(data->client, reg + offset, val);
666 static void mxt_input_button(struct mxt_data *data, u8 *message)
668 struct input_dev *input = data->input_dev;
669 const struct mxt_platform_data *pdata = data->pdata;
672 for (i = 0; i < pdata->t19_num_keys; i++) {
673 if (pdata->t19_keymap[i] == KEY_RESERVED)
676 /* Active-low switch */
677 input_report_key(input, pdata->t19_keymap[i],
678 !(message[1] & BIT(i)));
682 static void mxt_input_sync(struct mxt_data *data)
684 input_mt_report_pointer_emulation(data->input_dev,
685 data->pdata->t19_num_keys);
686 input_sync(data->input_dev);
689 static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
691 struct device *dev = &data->client->dev;
692 struct input_dev *input_dev = data->input_dev;
700 id = message[0] - data->T9_reportid_min;
702 x = (message[2] << 4) | ((message[4] >> 4) & 0xf);
703 y = (message[3] << 4) | ((message[4] & 0xf));
705 /* Handle 10/12 bit switching */
706 if (data->max_x < 1024)
708 if (data->max_y < 1024)
712 amplitude = message[6];
715 "[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u\n",
717 (status & MXT_T9_DETECT) ? 'D' : '.',
718 (status & MXT_T9_PRESS) ? 'P' : '.',
719 (status & MXT_T9_RELEASE) ? 'R' : '.',
720 (status & MXT_T9_MOVE) ? 'M' : '.',
721 (status & MXT_T9_VECTOR) ? 'V' : '.',
722 (status & MXT_T9_AMP) ? 'A' : '.',
723 (status & MXT_T9_SUPPRESS) ? 'S' : '.',
724 (status & MXT_T9_UNGRIP) ? 'U' : '.',
725 x, y, area, amplitude);
727 input_mt_slot(input_dev, id);
729 if (status & MXT_T9_DETECT) {
731 * Multiple bits may be set if the host is slow to read
732 * the status messages, indicating all the events that
735 if (status & MXT_T9_RELEASE) {
736 input_mt_report_slot_state(input_dev,
738 mxt_input_sync(data);
742 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 1);
743 input_report_abs(input_dev, ABS_MT_POSITION_X, x);
744 input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
745 input_report_abs(input_dev, ABS_MT_PRESSURE, amplitude);
746 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area);
748 /* Touch no longer active, close out slot */
749 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 0);
752 data->update_input = true;
755 static void mxt_proc_t100_message(struct mxt_data *data, u8 *message)
757 struct device *dev = &data->client->dev;
758 struct input_dev *input_dev = data->input_dev;
770 id = message[0] - data->T100_reportid_min - 2;
772 /* ignore SCRSTATUS events */
777 x = get_unaligned_le16(&message[2]);
778 y = get_unaligned_le16(&message[4]);
780 if (status & MXT_T100_DETECT) {
781 type = (status & MXT_T100_TYPE_MASK) >> 4;
784 case MXT_T100_TYPE_HOVERING_FINGER:
785 tool = MT_TOOL_FINGER;
786 distance = MXT_DISTANCE_HOVERING;
788 if (data->t100_aux_vect)
789 orientation = message[data->t100_aux_vect];
793 case MXT_T100_TYPE_FINGER:
794 case MXT_T100_TYPE_GLOVE:
795 tool = MT_TOOL_FINGER;
796 distance = MXT_DISTANCE_ACTIVE_TOUCH;
798 if (data->t100_aux_area)
799 major = message[data->t100_aux_area];
801 if (data->t100_aux_ampl)
802 pressure = message[data->t100_aux_ampl];
804 if (data->t100_aux_vect)
805 orientation = message[data->t100_aux_vect];
809 case MXT_T100_TYPE_PASSIVE_STYLUS:
813 * Passive stylus is reported with size zero so
816 major = MXT_TOUCH_MAJOR_DEFAULT;
818 if (data->t100_aux_ampl)
819 pressure = message[data->t100_aux_ampl];
823 case MXT_T100_TYPE_LARGE_TOUCH:
824 /* Ignore suppressed touch */
828 dev_dbg(dev, "Unexpected T100 type\n");
834 * Values reported should be non-zero if tool is touching the
837 if (!pressure && type != MXT_T100_TYPE_HOVERING_FINGER)
838 pressure = MXT_PRESSURE_DEFAULT;
840 input_mt_slot(input_dev, id);
842 if (status & MXT_T100_DETECT) {
843 dev_dbg(dev, "[%u] type:%u x:%u y:%u a:%02X p:%02X v:%02X\n",
844 id, type, x, y, major, pressure, orientation);
846 input_mt_report_slot_state(input_dev, tool, 1);
847 input_report_abs(input_dev, ABS_MT_POSITION_X, x);
848 input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
849 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, major);
850 input_report_abs(input_dev, ABS_MT_PRESSURE, pressure);
851 input_report_abs(input_dev, ABS_MT_DISTANCE, distance);
852 input_report_abs(input_dev, ABS_MT_ORIENTATION, orientation);
854 dev_dbg(dev, "[%u] release\n", id);
857 input_mt_report_slot_state(input_dev, 0, 0);
860 data->update_input = true;
863 static int mxt_proc_message(struct mxt_data *data, u8 *message)
865 u8 report_id = message[0];
867 if (report_id == MXT_RPTID_NOMSG)
870 if (report_id == data->T6_reportid) {
871 mxt_proc_t6_messages(data, message);
872 } else if (!data->input_dev) {
874 * Do not report events if input device
875 * is not yet registered.
877 mxt_dump_message(data, message);
878 } else if (report_id >= data->T9_reportid_min &&
879 report_id <= data->T9_reportid_max) {
880 mxt_proc_t9_message(data, message);
881 } else if (report_id >= data->T100_reportid_min &&
882 report_id <= data->T100_reportid_max) {
883 mxt_proc_t100_message(data, message);
884 } else if (report_id == data->T19_reportid) {
885 mxt_input_button(data, message);
886 data->update_input = true;
888 mxt_dump_message(data, message);
894 static int mxt_read_and_process_messages(struct mxt_data *data, u8 count)
896 struct device *dev = &data->client->dev;
901 /* Safety check for msg_buf */
902 if (count > data->max_reportid)
905 /* Process remaining messages if necessary */
906 ret = __mxt_read_reg(data->client, data->T5_address,
907 data->T5_msg_size * count, data->msg_buf);
909 dev_err(dev, "Failed to read %u messages (%d)\n", count, ret);
913 for (i = 0; i < count; i++) {
914 ret = mxt_proc_message(data,
915 data->msg_buf + data->T5_msg_size * i);
921 /* return number of messages read */
925 static irqreturn_t mxt_process_messages_t44(struct mxt_data *data)
927 struct device *dev = &data->client->dev;
931 /* Read T44 and T5 together */
932 ret = __mxt_read_reg(data->client, data->T44_address,
933 data->T5_msg_size + 1, data->msg_buf);
935 dev_err(dev, "Failed to read T44 and T5 (%d)\n", ret);
939 count = data->msg_buf[0];
943 * This condition is caused by the CHG line being configured
944 * in Mode 0. It results in unnecessary I2C operations but it
947 dev_dbg(dev, "Interrupt triggered but zero messages\n");
949 } else if (count > data->max_reportid) {
950 dev_err(dev, "T44 count %d exceeded max report id\n", count);
951 count = data->max_reportid;
954 /* Process first message */
955 ret = mxt_proc_message(data, data->msg_buf + 1);
957 dev_warn(dev, "Unexpected invalid message\n");
961 num_left = count - 1;
963 /* Process remaining messages if necessary */
965 ret = mxt_read_and_process_messages(data, num_left);
968 else if (ret != num_left)
969 dev_warn(dev, "Unexpected invalid message\n");
973 if (data->update_input) {
974 mxt_input_sync(data);
975 data->update_input = false;
981 static int mxt_process_messages_until_invalid(struct mxt_data *data)
983 struct device *dev = &data->client->dev;
987 count = data->max_reportid;
989 /* Read messages until we force an invalid */
991 read = mxt_read_and_process_messages(data, count);
996 if (data->update_input) {
997 mxt_input_sync(data);
998 data->update_input = false;
1001 dev_err(dev, "CHG pin isn't cleared\n");
1005 static irqreturn_t mxt_process_messages(struct mxt_data *data)
1007 int total_handled, num_handled;
1008 u8 count = data->last_message_count;
1010 if (count < 1 || count > data->max_reportid)
1013 /* include final invalid message */
1014 total_handled = mxt_read_and_process_messages(data, count + 1);
1015 if (total_handled < 0)
1017 /* if there were invalid messages, then we are done */
1018 else if (total_handled <= count)
1021 /* keep reading two msgs until one is invalid or reportid limit */
1023 num_handled = mxt_read_and_process_messages(data, 2);
1024 if (num_handled < 0)
1027 total_handled += num_handled;
1029 if (num_handled < 2)
1031 } while (total_handled < data->num_touchids);
1034 data->last_message_count = total_handled;
1036 if (data->update_input) {
1037 mxt_input_sync(data);
1038 data->update_input = false;
1044 static irqreturn_t mxt_interrupt(int irq, void *dev_id)
1046 struct mxt_data *data = dev_id;
1048 if (data->in_bootloader) {
1049 /* bootloader state transition completion */
1050 complete(&data->bl_completion);
1054 if (!data->object_table)
1057 if (data->T44_address) {
1058 return mxt_process_messages_t44(data);
1060 return mxt_process_messages(data);
1064 static int mxt_t6_command(struct mxt_data *data, u16 cmd_offset,
1065 u8 value, bool wait)
1068 u8 command_register;
1069 int timeout_counter = 0;
1072 reg = data->T6_address + cmd_offset;
1074 ret = mxt_write_reg(data->client, reg, value);
1083 ret = __mxt_read_reg(data->client, reg, 1, &command_register);
1086 } while (command_register != 0 && timeout_counter++ <= 100);
1088 if (timeout_counter > 100) {
1089 dev_err(&data->client->dev, "Command failed!\n");
1096 static int mxt_soft_reset(struct mxt_data *data)
1098 struct device *dev = &data->client->dev;
1101 dev_info(dev, "Resetting chip\n");
1103 reinit_completion(&data->reset_completion);
1105 ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_RESET_VALUE, false);
1109 ret = mxt_wait_for_completion(data, &data->reset_completion,
1117 static void mxt_update_crc(struct mxt_data *data, u8 cmd, u8 value)
1120 * On failure, CRC is set to 0 and config will always be
1123 data->config_crc = 0;
1124 reinit_completion(&data->crc_completion);
1126 mxt_t6_command(data, cmd, value, true);
1129 * Wait for crc message. On failure, CRC is set to 0 and config will
1130 * always be downloaded.
1132 mxt_wait_for_completion(data, &data->crc_completion, MXT_CRC_TIMEOUT);
1135 static void mxt_calc_crc24(u32 *crc, u8 firstbyte, u8 secondbyte)
1137 static const unsigned int crcpoly = 0x80001B;
1141 data_word = (secondbyte << 8) | firstbyte;
1142 result = ((*crc << 1) ^ data_word);
1144 if (result & 0x1000000)
1150 static u32 mxt_calculate_crc(u8 *base, off_t start_off, off_t end_off)
1153 u8 *ptr = base + start_off;
1154 u8 *last_val = base + end_off - 1;
1156 if (end_off < start_off)
1159 while (ptr < last_val) {
1160 mxt_calc_crc24(&crc, *ptr, *(ptr + 1));
1164 /* if len is odd, fill the last byte with 0 */
1165 if (ptr == last_val)
1166 mxt_calc_crc24(&crc, *ptr, 0);
1168 /* Mask to 24-bit */
1174 static int mxt_prepare_cfg_mem(struct mxt_data *data,
1175 const struct firmware *cfg,
1176 unsigned int data_pos,
1177 unsigned int cfg_start_ofs,
1179 size_t config_mem_size)
1181 struct device *dev = &data->client->dev;
1182 struct mxt_object *object;
1183 unsigned int type, instance, size, byte_offset;
1190 while (data_pos < cfg->size) {
1191 /* Read type, instance, length */
1192 ret = sscanf(cfg->data + data_pos, "%x %x %x%n",
1193 &type, &instance, &size, &offset);
1197 } else if (ret != 3) {
1198 dev_err(dev, "Bad format: failed to parse object\n");
1203 object = mxt_get_object(data, type);
1206 for (i = 0; i < size; i++) {
1207 ret = sscanf(cfg->data + data_pos, "%hhx%n",
1210 dev_err(dev, "Bad format in T%d at %d\n",
1219 if (size > mxt_obj_size(object)) {
1221 * Either we are in fallback mode due to wrong
1222 * config or config from a later fw version,
1223 * or the file is corrupt or hand-edited.
1225 dev_warn(dev, "Discarding %zu byte(s) in T%u\n",
1226 size - mxt_obj_size(object), type);
1227 } else if (mxt_obj_size(object) > size) {
1229 * If firmware is upgraded, new bytes may be added to
1230 * end of objects. It is generally forward compatible
1231 * to zero these bytes - previous behaviour will be
1232 * retained. However this does invalidate the CRC and
1233 * will force fallback mode until the configuration is
1234 * updated. We warn here but do nothing else - the
1235 * malloc has zeroed the entire configuration.
1237 dev_warn(dev, "Zeroing %zu byte(s) in T%d\n",
1238 mxt_obj_size(object) - size, type);
1241 if (instance >= mxt_obj_instances(object)) {
1242 dev_err(dev, "Object instances exceeded!\n");
1246 reg = object->start_address + mxt_obj_size(object) * instance;
1248 for (i = 0; i < size; i++) {
1249 ret = sscanf(cfg->data + data_pos, "%hhx%n",
1253 dev_err(dev, "Bad format in T%d at %d\n",
1259 if (i > mxt_obj_size(object))
1262 byte_offset = reg + i - cfg_start_ofs;
1264 if (byte_offset >= 0 && byte_offset < config_mem_size) {
1265 *(config_mem + byte_offset) = val;
1267 dev_err(dev, "Bad object: reg:%d, T%d, ofs=%d\n",
1268 reg, object->type, byte_offset);
1277 static int mxt_upload_cfg_mem(struct mxt_data *data, unsigned int cfg_start,
1278 u8 *config_mem, size_t config_mem_size)
1280 unsigned int byte_offset = 0;
1283 /* Write configuration as blocks */
1284 while (byte_offset < config_mem_size) {
1285 unsigned int size = config_mem_size - byte_offset;
1287 if (size > MXT_MAX_BLOCK_WRITE)
1288 size = MXT_MAX_BLOCK_WRITE;
1290 error = __mxt_write_reg(data->client,
1291 cfg_start + byte_offset,
1292 size, config_mem + byte_offset);
1294 dev_err(&data->client->dev,
1295 "Config write error, ret=%d\n", error);
1299 byte_offset += size;
1305 static int mxt_init_t7_power_cfg(struct mxt_data *data);
1308 * mxt_update_cfg - download configuration to chip
1310 * Atmel Raw Config File Format
1312 * The first four lines of the raw config file contain:
1314 * 2) Chip ID Information (first 7 bytes of device memory)
1315 * 3) Chip Information Block 24-bit CRC Checksum
1316 * 4) Chip Configuration 24-bit CRC Checksum
1318 * The rest of the file consists of one line per object instance:
1319 * <TYPE> <INSTANCE> <SIZE> <CONTENTS>
1321 * <TYPE> - 2-byte object type as hex
1322 * <INSTANCE> - 2-byte object instance number as hex
1323 * <SIZE> - 2-byte object size as hex
1324 * <CONTENTS> - array of <SIZE> 1-byte hex values
1326 static int mxt_update_cfg(struct mxt_data *data, const struct firmware *cfg)
1328 struct device *dev = &data->client->dev;
1329 struct mxt_info cfg_info;
1335 u32 info_crc, config_crc, calculated_crc;
1337 size_t config_mem_size;
1339 mxt_update_crc(data, MXT_COMMAND_REPORTALL, 1);
1341 if (strncmp(cfg->data, MXT_CFG_MAGIC, strlen(MXT_CFG_MAGIC))) {
1342 dev_err(dev, "Unrecognised config file\n");
1346 data_pos = strlen(MXT_CFG_MAGIC);
1348 /* Load information block and check */
1349 for (i = 0; i < sizeof(struct mxt_info); i++) {
1350 ret = sscanf(cfg->data + data_pos, "%hhx%n",
1351 (unsigned char *)&cfg_info + i,
1354 dev_err(dev, "Bad format\n");
1361 if (cfg_info.family_id != data->info.family_id) {
1362 dev_err(dev, "Family ID mismatch!\n");
1366 if (cfg_info.variant_id != data->info.variant_id) {
1367 dev_err(dev, "Variant ID mismatch!\n");
1372 ret = sscanf(cfg->data + data_pos, "%x%n", &info_crc, &offset);
1374 dev_err(dev, "Bad format: failed to parse Info CRC\n");
1379 ret = sscanf(cfg->data + data_pos, "%x%n", &config_crc, &offset);
1381 dev_err(dev, "Bad format: failed to parse Config CRC\n");
1387 * The Info Block CRC is calculated over mxt_info and the object
1388 * table. If it does not match then we are trying to load the
1389 * configuration from a different chip or firmware version, so
1390 * the configuration CRC is invalid anyway.
1392 if (info_crc == data->info_crc) {
1393 if (config_crc == 0 || data->config_crc == 0) {
1394 dev_info(dev, "CRC zero, attempting to apply config\n");
1395 } else if (config_crc == data->config_crc) {
1396 dev_dbg(dev, "Config CRC 0x%06X: OK\n",
1400 dev_info(dev, "Config CRC 0x%06X: does not match file 0x%06X\n",
1401 data->config_crc, config_crc);
1405 "Warning: Info CRC error - device=0x%06X file=0x%06X\n",
1406 data->info_crc, info_crc);
1409 /* Malloc memory to store configuration */
1410 cfg_start_ofs = MXT_OBJECT_START +
1411 data->info.object_num * sizeof(struct mxt_object) +
1412 MXT_INFO_CHECKSUM_SIZE;
1413 config_mem_size = data->mem_size - cfg_start_ofs;
1414 config_mem = kzalloc(config_mem_size, GFP_KERNEL);
1416 dev_err(dev, "Failed to allocate memory\n");
1420 ret = mxt_prepare_cfg_mem(data, cfg, data_pos, cfg_start_ofs,
1421 config_mem, config_mem_size);
1425 /* Calculate crc of the received configs (not the raw config file) */
1426 if (data->T7_address < cfg_start_ofs) {
1427 dev_err(dev, "Bad T7 address, T7addr = %x, config offset %x\n",
1428 data->T7_address, cfg_start_ofs);
1433 calculated_crc = mxt_calculate_crc(config_mem,
1434 data->T7_address - cfg_start_ofs,
1437 if (config_crc > 0 && config_crc != calculated_crc)
1438 dev_warn(dev, "Config CRC error, calculated=%06X, file=%06X\n",
1439 calculated_crc, config_crc);
1441 ret = mxt_upload_cfg_mem(data, cfg_start_ofs,
1442 config_mem, config_mem_size);
1446 mxt_update_crc(data, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE);
1448 ret = mxt_soft_reset(data);
1452 dev_info(dev, "Config successfully updated\n");
1454 /* T7 config may have changed */
1455 mxt_init_t7_power_cfg(data);
1462 static int mxt_acquire_irq(struct mxt_data *data)
1466 enable_irq(data->irq);
1468 error = mxt_process_messages_until_invalid(data);
1475 static int mxt_get_info(struct mxt_data *data)
1477 struct i2c_client *client = data->client;
1478 struct mxt_info *info = &data->info;
1481 /* Read 7-byte info block starting at address 0 */
1482 error = __mxt_read_reg(client, 0, sizeof(*info), info);
1489 static void mxt_free_input_device(struct mxt_data *data)
1491 if (data->input_dev) {
1492 input_unregister_device(data->input_dev);
1493 data->input_dev = NULL;
1497 static void mxt_free_object_table(struct mxt_data *data)
1499 kfree(data->object_table);
1500 data->object_table = NULL;
1501 kfree(data->msg_buf);
1502 data->msg_buf = NULL;
1503 data->T5_address = 0;
1504 data->T5_msg_size = 0;
1505 data->T6_reportid = 0;
1506 data->T7_address = 0;
1507 data->T9_reportid_min = 0;
1508 data->T9_reportid_max = 0;
1509 data->T19_reportid = 0;
1510 data->T44_address = 0;
1511 data->T100_reportid_min = 0;
1512 data->T100_reportid_max = 0;
1513 data->max_reportid = 0;
1516 static int mxt_get_object_table(struct mxt_data *data)
1518 struct i2c_client *client = data->client;
1520 struct mxt_object *object_table;
1526 table_size = data->info.object_num * sizeof(struct mxt_object);
1527 object_table = kzalloc(table_size, GFP_KERNEL);
1528 if (!object_table) {
1529 dev_err(&data->client->dev, "Failed to allocate memory\n");
1533 error = __mxt_read_reg(client, MXT_OBJECT_START, table_size,
1536 kfree(object_table);
1540 /* Valid Report IDs start counting from 1 */
1543 for (i = 0; i < data->info.object_num; i++) {
1544 struct mxt_object *object = object_table + i;
1547 le16_to_cpus(&object->start_address);
1549 if (object->num_report_ids) {
1551 reportid += object->num_report_ids *
1552 mxt_obj_instances(object);
1553 max_id = reportid - 1;
1559 dev_dbg(&data->client->dev,
1560 "T%u Start:%u Size:%zu Instances:%zu Report IDs:%u-%u\n",
1561 object->type, object->start_address,
1562 mxt_obj_size(object), mxt_obj_instances(object),
1565 switch (object->type) {
1566 case MXT_GEN_MESSAGE_T5:
1567 if (data->info.family_id == 0x80 &&
1568 data->info.version < 0x20) {
1570 * On mXT224 firmware versions prior to V2.0
1571 * read and discard unused CRC byte otherwise
1572 * DMA reads are misaligned.
1574 data->T5_msg_size = mxt_obj_size(object);
1576 /* CRC not enabled, so skip last byte */
1577 data->T5_msg_size = mxt_obj_size(object) - 1;
1579 data->T5_address = object->start_address;
1581 case MXT_GEN_COMMAND_T6:
1582 data->T6_reportid = min_id;
1583 data->T6_address = object->start_address;
1585 case MXT_GEN_POWER_T7:
1586 data->T7_address = object->start_address;
1588 case MXT_TOUCH_MULTI_T9:
1589 data->multitouch = MXT_TOUCH_MULTI_T9;
1590 data->T9_reportid_min = min_id;
1591 data->T9_reportid_max = max_id;
1592 data->num_touchids = object->num_report_ids
1593 * mxt_obj_instances(object);
1595 case MXT_SPT_MESSAGECOUNT_T44:
1596 data->T44_address = object->start_address;
1598 case MXT_SPT_GPIOPWM_T19:
1599 data->T19_reportid = min_id;
1601 case MXT_TOUCH_MULTITOUCHSCREEN_T100:
1602 data->multitouch = MXT_TOUCH_MULTITOUCHSCREEN_T100;
1603 data->T100_reportid_min = min_id;
1604 data->T100_reportid_max = max_id;
1605 /* first two report IDs reserved */
1606 data->num_touchids = object->num_report_ids - 2;
1610 end_address = object->start_address
1611 + mxt_obj_size(object) * mxt_obj_instances(object) - 1;
1613 if (end_address >= data->mem_size)
1614 data->mem_size = end_address + 1;
1617 /* Store maximum reportid */
1618 data->max_reportid = reportid;
1620 /* If T44 exists, T5 position has to be directly after */
1621 if (data->T44_address && (data->T5_address != data->T44_address + 1)) {
1622 dev_err(&client->dev, "Invalid T44 position\n");
1624 goto free_object_table;
1627 data->msg_buf = kcalloc(data->max_reportid,
1628 data->T5_msg_size, GFP_KERNEL);
1629 if (!data->msg_buf) {
1630 dev_err(&client->dev, "Failed to allocate message buffer\n");
1632 goto free_object_table;
1635 data->object_table = object_table;
1640 mxt_free_object_table(data);
1644 static int mxt_read_t9_resolution(struct mxt_data *data)
1646 struct i2c_client *client = data->client;
1648 struct t9_range range;
1649 unsigned char orient;
1650 struct mxt_object *object;
1652 object = mxt_get_object(data, MXT_TOUCH_MULTI_T9);
1656 error = __mxt_read_reg(client,
1657 object->start_address + MXT_T9_RANGE,
1658 sizeof(range), &range);
1662 le16_to_cpus(&range.x);
1663 le16_to_cpus(&range.y);
1665 error = __mxt_read_reg(client,
1666 object->start_address + MXT_T9_ORIENT,
1671 /* Handle default values */
1678 if (orient & MXT_T9_ORIENT_SWITCH) {
1679 data->max_x = range.y;
1680 data->max_y = range.x;
1682 data->max_x = range.x;
1683 data->max_y = range.y;
1686 dev_dbg(&client->dev,
1687 "Touchscreen size X%uY%u\n", data->max_x, data->max_y);
1692 static int mxt_read_t100_config(struct mxt_data *data)
1694 struct i2c_client *client = data->client;
1696 struct mxt_object *object;
1697 u16 range_x, range_y;
1701 object = mxt_get_object(data, MXT_TOUCH_MULTITOUCHSCREEN_T100);
1705 error = __mxt_read_reg(client,
1706 object->start_address + MXT_T100_XRANGE,
1707 sizeof(range_x), &range_x);
1711 le16_to_cpus(&range_x);
1713 error = __mxt_read_reg(client,
1714 object->start_address + MXT_T100_YRANGE,
1715 sizeof(range_y), &range_y);
1719 le16_to_cpus(&range_y);
1721 error = __mxt_read_reg(client,
1722 object->start_address + MXT_T100_CFG1,
1727 error = __mxt_read_reg(client,
1728 object->start_address + MXT_T100_TCHAUX,
1733 /* Handle default values */
1740 if (cfg & MXT_T100_CFG_SWITCHXY) {
1741 data->max_x = range_y;
1742 data->max_y = range_x;
1744 data->max_x = range_x;
1745 data->max_y = range_y;
1748 /* allocate aux bytes */
1751 if (tchaux & MXT_T100_TCHAUX_VECT)
1752 data->t100_aux_vect = aux++;
1754 if (tchaux & MXT_T100_TCHAUX_AMPL)
1755 data->t100_aux_ampl = aux++;
1757 if (tchaux & MXT_T100_TCHAUX_AREA)
1758 data->t100_aux_area = aux++;
1760 dev_dbg(&client->dev,
1761 "T100 aux mappings vect:%u ampl:%u area:%u\n",
1762 data->t100_aux_vect, data->t100_aux_ampl, data->t100_aux_area);
1764 dev_info(&client->dev,
1765 "T100 Touchscreen size X%uY%u\n", data->max_x, data->max_y);
1770 static int mxt_input_open(struct input_dev *dev);
1771 static void mxt_input_close(struct input_dev *dev);
1773 static void mxt_set_up_as_touchpad(struct input_dev *input_dev,
1774 struct mxt_data *data)
1776 const struct mxt_platform_data *pdata = data->pdata;
1779 input_dev->name = "Atmel maXTouch Touchpad";
1781 __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
1783 input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM);
1784 input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM);
1785 input_abs_set_res(input_dev, ABS_MT_POSITION_X,
1787 input_abs_set_res(input_dev, ABS_MT_POSITION_Y,
1790 for (i = 0; i < pdata->t19_num_keys; i++)
1791 if (pdata->t19_keymap[i] != KEY_RESERVED)
1792 input_set_capability(input_dev, EV_KEY,
1793 pdata->t19_keymap[i]);
1796 static int mxt_initialize_input_device(struct mxt_data *data)
1798 const struct mxt_platform_data *pdata = data->pdata;
1799 struct device *dev = &data->client->dev;
1800 struct input_dev *input_dev;
1802 unsigned int num_mt_slots;
1803 unsigned int mt_flags = 0;
1805 switch (data->multitouch) {
1806 case MXT_TOUCH_MULTI_T9:
1807 num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
1808 error = mxt_read_t9_resolution(data);
1810 dev_warn(dev, "Failed to initialize T9 resolution\n");
1813 case MXT_TOUCH_MULTITOUCHSCREEN_T100:
1814 num_mt_slots = data->num_touchids;
1815 error = mxt_read_t100_config(data);
1817 dev_warn(dev, "Failed to read T100 config\n");
1821 dev_err(dev, "Invalid multitouch object\n");
1825 input_dev = input_allocate_device();
1827 dev_err(dev, "Failed to allocate memory\n");
1831 input_dev->name = "Atmel maXTouch Touchscreen";
1832 input_dev->phys = data->phys;
1833 input_dev->id.bustype = BUS_I2C;
1834 input_dev->dev.parent = dev;
1835 input_dev->open = mxt_input_open;
1836 input_dev->close = mxt_input_close;
1838 input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
1840 /* For single touch */
1841 input_set_abs_params(input_dev, ABS_X, 0, data->max_x, 0, 0);
1842 input_set_abs_params(input_dev, ABS_Y, 0, data->max_y, 0, 0);
1844 if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
1845 (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1846 data->t100_aux_ampl)) {
1847 input_set_abs_params(input_dev, ABS_PRESSURE, 0, 255, 0, 0);
1850 /* If device has buttons we assume it is a touchpad */
1851 if (pdata->t19_num_keys) {
1852 mxt_set_up_as_touchpad(input_dev, data);
1853 mt_flags |= INPUT_MT_POINTER;
1856 /* For multi touch */
1857 error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags);
1859 dev_err(dev, "Error %d initialising slots\n", error);
1863 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100) {
1864 input_set_abs_params(input_dev, ABS_MT_TOOL_TYPE,
1865 0, MT_TOOL_MAX, 0, 0);
1866 input_set_abs_params(input_dev, ABS_MT_DISTANCE,
1867 MXT_DISTANCE_ACTIVE_TOUCH,
1868 MXT_DISTANCE_HOVERING,
1872 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
1873 0, data->max_x, 0, 0);
1874 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
1875 0, data->max_y, 0, 0);
1877 if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
1878 (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1879 data->t100_aux_area)) {
1880 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
1881 0, MXT_MAX_AREA, 0, 0);
1884 if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
1885 (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1886 data->t100_aux_ampl)) {
1887 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
1891 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1892 data->t100_aux_vect) {
1893 input_set_abs_params(input_dev, ABS_MT_ORIENTATION,
1897 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1898 data->t100_aux_ampl) {
1899 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
1903 if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
1904 data->t100_aux_vect) {
1905 input_set_abs_params(input_dev, ABS_MT_ORIENTATION,
1909 input_set_drvdata(input_dev, data);
1911 error = input_register_device(input_dev);
1913 dev_err(dev, "Error %d registering input device\n", error);
1917 data->input_dev = input_dev;
1922 input_free_device(input_dev);
1926 static int mxt_configure_objects(struct mxt_data *data,
1927 const struct firmware *cfg);
1929 static void mxt_config_cb(const struct firmware *cfg, void *ctx)
1931 mxt_configure_objects(ctx, cfg);
1932 release_firmware(cfg);
1935 static int mxt_initialize(struct mxt_data *data)
1937 struct i2c_client *client = data->client;
1938 int recovery_attempts = 0;
1942 error = mxt_get_info(data);
1946 /* Check bootloader state */
1947 error = mxt_probe_bootloader(data, false);
1949 dev_info(&client->dev, "Trying alternate bootloader address\n");
1950 error = mxt_probe_bootloader(data, true);
1952 /* Chip is not in appmode or bootloader mode */
1957 /* OK, we are in bootloader, see if we can recover */
1958 if (++recovery_attempts > 1) {
1959 dev_err(&client->dev, "Could not recover from bootloader mode\n");
1961 * We can reflash from this state, so do not
1962 * abort initialization.
1964 data->in_bootloader = true;
1968 /* Attempt to exit bootloader into app mode */
1969 mxt_send_bootloader_cmd(data, false);
1970 msleep(MXT_FW_RESET_TIME);
1973 /* Get object table information */
1974 error = mxt_get_object_table(data);
1976 dev_err(&client->dev, "Error %d reading object table\n", error);
1980 error = mxt_acquire_irq(data);
1982 goto err_free_object_table;
1984 error = request_firmware_nowait(THIS_MODULE, true, MXT_CFG_NAME,
1985 &client->dev, GFP_KERNEL, data,
1988 dev_err(&client->dev, "Failed to invoke firmware loader: %d\n",
1990 goto err_free_object_table;
1995 err_free_object_table:
1996 mxt_free_object_table(data);
2000 static int mxt_set_t7_power_cfg(struct mxt_data *data, u8 sleep)
2002 struct device *dev = &data->client->dev;
2004 struct t7_config *new_config;
2005 struct t7_config deepsleep = { .active = 0, .idle = 0 };
2007 if (sleep == MXT_POWER_CFG_DEEPSLEEP)
2008 new_config = &deepsleep;
2010 new_config = &data->t7_cfg;
2012 error = __mxt_write_reg(data->client, data->T7_address,
2013 sizeof(data->t7_cfg), new_config);
2017 dev_dbg(dev, "Set T7 ACTV:%d IDLE:%d\n",
2018 new_config->active, new_config->idle);
2023 static int mxt_init_t7_power_cfg(struct mxt_data *data)
2025 struct device *dev = &data->client->dev;
2030 error = __mxt_read_reg(data->client, data->T7_address,
2031 sizeof(data->t7_cfg), &data->t7_cfg);
2035 if (data->t7_cfg.active == 0 || data->t7_cfg.idle == 0) {
2037 dev_dbg(dev, "T7 cfg zero, resetting\n");
2038 mxt_soft_reset(data);
2042 dev_dbg(dev, "T7 cfg zero after reset, overriding\n");
2043 data->t7_cfg.active = 20;
2044 data->t7_cfg.idle = 100;
2045 return mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
2049 dev_dbg(dev, "Initialized power cfg: ACTV %d, IDLE %d\n",
2050 data->t7_cfg.active, data->t7_cfg.idle);
2054 static int mxt_configure_objects(struct mxt_data *data,
2055 const struct firmware *cfg)
2057 struct device *dev = &data->client->dev;
2058 struct mxt_info *info = &data->info;
2061 error = mxt_init_t7_power_cfg(data);
2063 dev_err(dev, "Failed to initialize power cfg\n");
2068 error = mxt_update_cfg(data, cfg);
2070 dev_warn(dev, "Error %d updating config\n", error);
2073 if (data->multitouch) {
2074 error = mxt_initialize_input_device(data);
2078 dev_warn(dev, "No touch object detected\n");
2082 "Family: %u Variant: %u Firmware V%u.%u.%02X Objects: %u\n",
2083 info->family_id, info->variant_id, info->version >> 4,
2084 info->version & 0xf, info->build, info->object_num);
2089 /* Firmware Version is returned as Major.Minor.Build */
2090 static ssize_t mxt_fw_version_show(struct device *dev,
2091 struct device_attribute *attr, char *buf)
2093 struct mxt_data *data = dev_get_drvdata(dev);
2094 struct mxt_info *info = &data->info;
2095 return scnprintf(buf, PAGE_SIZE, "%u.%u.%02X\n",
2096 info->version >> 4, info->version & 0xf, info->build);
2099 /* Hardware Version is returned as FamilyID.VariantID */
2100 static ssize_t mxt_hw_version_show(struct device *dev,
2101 struct device_attribute *attr, char *buf)
2103 struct mxt_data *data = dev_get_drvdata(dev);
2104 struct mxt_info *info = &data->info;
2105 return scnprintf(buf, PAGE_SIZE, "%u.%u\n",
2106 info->family_id, info->variant_id);
2109 static ssize_t mxt_show_instance(char *buf, int count,
2110 struct mxt_object *object, int instance,
2115 if (mxt_obj_instances(object) > 1)
2116 count += scnprintf(buf + count, PAGE_SIZE - count,
2117 "Instance %u\n", instance);
2119 for (i = 0; i < mxt_obj_size(object); i++)
2120 count += scnprintf(buf + count, PAGE_SIZE - count,
2121 "\t[%2u]: %02x (%d)\n", i, val[i], val[i]);
2122 count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
2127 static ssize_t mxt_object_show(struct device *dev,
2128 struct device_attribute *attr, char *buf)
2130 struct mxt_data *data = dev_get_drvdata(dev);
2131 struct mxt_object *object;
2137 /* Pre-allocate buffer large enough to hold max sized object. */
2138 obuf = kmalloc(256, GFP_KERNEL);
2143 for (i = 0; i < data->info.object_num; i++) {
2144 object = data->object_table + i;
2146 if (!mxt_object_readable(object->type))
2149 count += scnprintf(buf + count, PAGE_SIZE - count,
2150 "T%u:\n", object->type);
2152 for (j = 0; j < mxt_obj_instances(object); j++) {
2153 u16 size = mxt_obj_size(object);
2154 u16 addr = object->start_address + j * size;
2156 error = __mxt_read_reg(data->client, addr, size, obuf);
2160 count = mxt_show_instance(buf, count, object, j, obuf);
2166 return error ?: count;
2169 static int mxt_check_firmware_format(struct device *dev,
2170 const struct firmware *fw)
2172 unsigned int pos = 0;
2175 while (pos < fw->size) {
2176 c = *(fw->data + pos);
2178 if (c < '0' || (c > '9' && c < 'A') || c > 'F')
2185 * To convert file try:
2186 * xxd -r -p mXTXXX__APP_VX-X-XX.enc > maxtouch.fw
2188 dev_err(dev, "Aborting: firmware file must be in binary format\n");
2193 static int mxt_load_fw(struct device *dev, const char *fn)
2195 struct mxt_data *data = dev_get_drvdata(dev);
2196 const struct firmware *fw = NULL;
2197 unsigned int frame_size;
2198 unsigned int pos = 0;
2199 unsigned int retry = 0;
2200 unsigned int frame = 0;
2203 ret = request_firmware(&fw, fn, dev);
2205 dev_err(dev, "Unable to open firmware %s\n", fn);
2209 /* Check for incorrect enc file */
2210 ret = mxt_check_firmware_format(dev, fw);
2212 goto release_firmware;
2214 if (!data->in_bootloader) {
2215 /* Change to the bootloader mode */
2216 data->in_bootloader = true;
2218 ret = mxt_t6_command(data, MXT_COMMAND_RESET,
2219 MXT_BOOT_VALUE, false);
2221 goto release_firmware;
2223 msleep(MXT_RESET_TIME);
2225 /* Do not need to scan since we know family ID */
2226 ret = mxt_lookup_bootloader_address(data, 0);
2228 goto release_firmware;
2230 mxt_free_input_device(data);
2231 mxt_free_object_table(data);
2233 enable_irq(data->irq);
2236 reinit_completion(&data->bl_completion);
2238 ret = mxt_check_bootloader(data, MXT_WAITING_BOOTLOAD_CMD, false);
2240 /* Bootloader may still be unlocked from previous attempt */
2241 ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, false);
2245 dev_info(dev, "Unlocking bootloader\n");
2247 /* Unlock bootloader */
2248 ret = mxt_send_bootloader_cmd(data, true);
2253 while (pos < fw->size) {
2254 ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, true);
2258 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
2260 /* Take account of CRC bytes */
2263 /* Write one frame to device */
2264 ret = mxt_bootloader_write(data, fw->data + pos, frame_size);
2268 ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS, true);
2272 /* Back off by 20ms per retry */
2276 dev_err(dev, "Retry count exceeded\n");
2285 if (frame % 50 == 0)
2286 dev_dbg(dev, "Sent %d frames, %d/%zd bytes\n",
2287 frame, pos, fw->size);
2290 /* Wait for flash. */
2291 ret = mxt_wait_for_completion(data, &data->bl_completion,
2296 dev_dbg(dev, "Sent %d frames, %d bytes\n", frame, pos);
2299 * Wait for device to reset. Some bootloader versions do not assert
2300 * the CHG line after bootloading has finished, so ignore potential
2303 mxt_wait_for_completion(data, &data->bl_completion, MXT_FW_RESET_TIME);
2305 data->in_bootloader = false;
2308 disable_irq(data->irq);
2310 release_firmware(fw);
2314 static ssize_t mxt_update_fw_store(struct device *dev,
2315 struct device_attribute *attr,
2316 const char *buf, size_t count)
2318 struct mxt_data *data = dev_get_drvdata(dev);
2321 error = mxt_load_fw(dev, MXT_FW_NAME);
2323 dev_err(dev, "The firmware update failed(%d)\n", error);
2326 dev_info(dev, "The firmware update succeeded\n");
2328 error = mxt_initialize(data);
2336 static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL);
2337 static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL);
2338 static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
2339 static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
2341 static struct attribute *mxt_attrs[] = {
2342 &dev_attr_fw_version.attr,
2343 &dev_attr_hw_version.attr,
2344 &dev_attr_object.attr,
2345 &dev_attr_update_fw.attr,
2349 static const struct attribute_group mxt_attr_group = {
2353 static void mxt_start(struct mxt_data *data)
2355 switch (data->pdata->suspend_mode) {
2356 case MXT_SUSPEND_T9_CTRL:
2357 mxt_soft_reset(data);
2360 /* 0x83 = SCANEN | RPTEN | ENABLE */
2361 mxt_write_object(data,
2362 MXT_TOUCH_MULTI_T9, MXT_T9_CTRL, 0x83);
2365 case MXT_SUSPEND_DEEP_SLEEP:
2367 mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
2369 /* Recalibrate since chip has been in deep sleep */
2370 mxt_t6_command(data, MXT_COMMAND_CALIBRATE, 1, false);
2376 static void mxt_stop(struct mxt_data *data)
2378 switch (data->pdata->suspend_mode) {
2379 case MXT_SUSPEND_T9_CTRL:
2381 mxt_write_object(data,
2382 MXT_TOUCH_MULTI_T9, MXT_T9_CTRL, 0);
2385 case MXT_SUSPEND_DEEP_SLEEP:
2387 mxt_set_t7_power_cfg(data, MXT_POWER_CFG_DEEPSLEEP);
2392 static int mxt_input_open(struct input_dev *dev)
2394 struct mxt_data *data = input_get_drvdata(dev);
2401 static void mxt_input_close(struct input_dev *dev)
2403 struct mxt_data *data = input_get_drvdata(dev);
2409 static const struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client)
2411 struct mxt_platform_data *pdata;
2412 struct device_node *np = client->dev.of_node;
2417 return ERR_PTR(-ENOENT);
2419 pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
2421 return ERR_PTR(-ENOMEM);
2423 if (of_find_property(np, "linux,gpio-keymap", &proplen)) {
2424 pdata->t19_num_keys = proplen / sizeof(u32);
2426 keymap = devm_kzalloc(&client->dev,
2427 pdata->t19_num_keys * sizeof(keymap[0]),
2430 return ERR_PTR(-ENOMEM);
2432 ret = of_property_read_u32_array(np, "linux,gpio-keymap",
2433 keymap, pdata->t19_num_keys);
2435 dev_warn(&client->dev,
2436 "Couldn't read linux,gpio-keymap: %d\n", ret);
2438 pdata->t19_keymap = keymap;
2441 pdata->suspend_mode = MXT_SUSPEND_DEEP_SLEEP;
2446 static const struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client)
2448 return ERR_PTR(-ENOENT);
2454 struct mxt_acpi_platform_data {
2456 struct mxt_platform_data pdata;
2459 static unsigned int samus_touchpad_buttons[] = {
2466 static struct mxt_acpi_platform_data samus_platform_data[] = {
2471 .t19_num_keys = ARRAY_SIZE(samus_touchpad_buttons),
2472 .t19_keymap = samus_touchpad_buttons,
2482 static const struct dmi_system_id mxt_dmi_table[] = {
2484 /* 2015 Google Pixel */
2485 .ident = "Chromebook Pixel 2",
2487 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
2488 DMI_MATCH(DMI_PRODUCT_NAME, "Samus"),
2490 .driver_data = samus_platform_data,
2495 static const struct mxt_platform_data *mxt_parse_acpi(struct i2c_client *client)
2497 struct acpi_device *adev;
2498 const struct dmi_system_id *system_id;
2499 const struct mxt_acpi_platform_data *acpi_pdata;
2502 * Ignore ACPI devices representing bootloader mode.
2504 * This is a bit of a hack: Google Chromebook BIOS creates ACPI
2505 * devices for both application and bootloader modes, but we are
2506 * interested in application mode only (if device is in bootloader
2507 * mode we'll end up switching into application anyway). So far
2508 * application mode addresses were all above 0x40, so we'll use it
2511 if (client->addr < 0x40)
2512 return ERR_PTR(-ENXIO);
2514 adev = ACPI_COMPANION(&client->dev);
2516 return ERR_PTR(-ENOENT);
2518 system_id = dmi_first_match(mxt_dmi_table);
2520 return ERR_PTR(-ENOENT);
2522 acpi_pdata = system_id->driver_data;
2524 return ERR_PTR(-ENOENT);
2526 while (acpi_pdata->hid) {
2527 if (!strcmp(acpi_device_hid(adev), acpi_pdata->hid))
2528 return &acpi_pdata->pdata;
2533 return ERR_PTR(-ENOENT);
2536 static const struct mxt_platform_data *mxt_parse_acpi(struct i2c_client *client)
2538 return ERR_PTR(-ENOENT);
2542 static const struct mxt_platform_data *
2543 mxt_get_platform_data(struct i2c_client *client)
2545 const struct mxt_platform_data *pdata;
2547 pdata = dev_get_platdata(&client->dev);
2551 pdata = mxt_parse_dt(client);
2552 if (!IS_ERR(pdata) || PTR_ERR(pdata) != -ENOENT)
2555 pdata = mxt_parse_acpi(client);
2556 if (!IS_ERR(pdata) || PTR_ERR(pdata) != -ENOENT)
2559 dev_err(&client->dev, "No platform data specified\n");
2560 return ERR_PTR(-EINVAL);
2563 static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id)
2565 struct mxt_data *data;
2566 const struct mxt_platform_data *pdata;
2569 pdata = mxt_get_platform_data(client);
2571 return PTR_ERR(pdata);
2573 data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
2575 dev_err(&client->dev, "Failed to allocate memory\n");
2579 snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
2580 client->adapter->nr, client->addr);
2582 data->client = client;
2583 data->pdata = pdata;
2584 data->irq = client->irq;
2585 i2c_set_clientdata(client, data);
2587 init_completion(&data->bl_completion);
2588 init_completion(&data->reset_completion);
2589 init_completion(&data->crc_completion);
2591 error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
2592 pdata->irqflags | IRQF_ONESHOT,
2593 client->name, data);
2595 dev_err(&client->dev, "Failed to register interrupt\n");
2599 disable_irq(client->irq);
2601 error = mxt_initialize(data);
2605 error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
2607 dev_err(&client->dev, "Failure %d creating sysfs group\n",
2609 goto err_free_object;
2615 mxt_free_input_device(data);
2616 mxt_free_object_table(data);
2618 free_irq(client->irq, data);
2624 static int mxt_remove(struct i2c_client *client)
2626 struct mxt_data *data = i2c_get_clientdata(client);
2628 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
2629 free_irq(data->irq, data);
2630 mxt_free_input_device(data);
2631 mxt_free_object_table(data);
2637 static int __maybe_unused mxt_suspend(struct device *dev)
2639 struct i2c_client *client = to_i2c_client(dev);
2640 struct mxt_data *data = i2c_get_clientdata(client);
2641 struct input_dev *input_dev = data->input_dev;
2646 mutex_lock(&input_dev->mutex);
2648 if (input_dev->users)
2651 mutex_unlock(&input_dev->mutex);
2656 static int __maybe_unused mxt_resume(struct device *dev)
2658 struct i2c_client *client = to_i2c_client(dev);
2659 struct mxt_data *data = i2c_get_clientdata(client);
2660 struct input_dev *input_dev = data->input_dev;
2665 mutex_lock(&input_dev->mutex);
2667 if (input_dev->users)
2670 mutex_unlock(&input_dev->mutex);
2675 static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
2677 static const struct of_device_id mxt_of_match[] = {
2678 { .compatible = "atmel,maxtouch", },
2681 MODULE_DEVICE_TABLE(of, mxt_of_match);
2684 static const struct acpi_device_id mxt_acpi_id[] = {
2685 { "ATML0000", 0 }, /* Touchpad */
2686 { "ATML0001", 0 }, /* Touchscreen */
2689 MODULE_DEVICE_TABLE(acpi, mxt_acpi_id);
2692 static const struct i2c_device_id mxt_id[] = {
2693 { "qt602240_ts", 0 },
2694 { "atmel_mxt_ts", 0 },
2695 { "atmel_mxt_tp", 0 },
2699 MODULE_DEVICE_TABLE(i2c, mxt_id);
2701 static struct i2c_driver mxt_driver = {
2703 .name = "atmel_mxt_ts",
2704 .of_match_table = of_match_ptr(mxt_of_match),
2705 .acpi_match_table = ACPI_PTR(mxt_acpi_id),
2709 .remove = mxt_remove,
2713 module_i2c_driver(mxt_driver);
2715 /* Module information */
2716 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
2717 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
2718 MODULE_LICENSE("GPL");