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3315 lines
77 KiB
3315 lines
77 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Atmel maXTouch Touchscreen driver |
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* |
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* Copyright (C) 2010 Samsung Electronics Co.Ltd |
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* Copyright (C) 2011-2014 Atmel Corporation |
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* Copyright (C) 2012 Google, Inc. |
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* Copyright (C) 2016 Zodiac Inflight Innovations |
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* |
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* Author: Joonyoung Shim <[email protected]> |
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*/ |
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|
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#include <linux/acpi.h> |
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#include <linux/dmi.h> |
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/completion.h> |
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#include <linux/delay.h> |
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#include <linux/firmware.h> |
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#include <linux/i2c.h> |
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#include <linux/input/mt.h> |
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#include <linux/interrupt.h> |
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#include <linux/irq.h> |
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#include <linux/of.h> |
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#include <linux/property.h> |
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#include <linux/slab.h> |
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#include <linux/regulator/consumer.h> |
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#include <linux/gpio/consumer.h> |
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#include <asm/unaligned.h> |
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#include <media/v4l2-device.h> |
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#include <media/v4l2-ioctl.h> |
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#include <media/videobuf2-v4l2.h> |
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#include <media/videobuf2-vmalloc.h> |
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|
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/* Firmware files */ |
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#define MXT_FW_NAME "maxtouch.fw" |
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#define MXT_CFG_NAME "maxtouch.cfg" |
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#define MXT_CFG_MAGIC "OBP_RAW V1" |
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|
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/* Registers */ |
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#define MXT_OBJECT_START 0x07 |
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#define MXT_OBJECT_SIZE 6 |
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#define MXT_INFO_CHECKSUM_SIZE 3 |
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#define MXT_MAX_BLOCK_WRITE 256 |
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|
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/* Object types */ |
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#define MXT_DEBUG_DIAGNOSTIC_T37 37 |
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#define MXT_GEN_MESSAGE_T5 5 |
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#define MXT_GEN_COMMAND_T6 6 |
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#define MXT_GEN_POWER_T7 7 |
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#define MXT_GEN_ACQUIRE_T8 8 |
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#define MXT_GEN_DATASOURCE_T53 53 |
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#define MXT_TOUCH_MULTI_T9 9 |
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#define MXT_TOUCH_KEYARRAY_T15 15 |
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#define MXT_TOUCH_PROXIMITY_T23 23 |
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#define MXT_TOUCH_PROXKEY_T52 52 |
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#define MXT_PROCI_GRIPFACE_T20 20 |
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#define MXT_PROCG_NOISE_T22 22 |
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#define MXT_PROCI_ONETOUCH_T24 24 |
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#define MXT_PROCI_TWOTOUCH_T27 27 |
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#define MXT_PROCI_GRIP_T40 40 |
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#define MXT_PROCI_PALM_T41 41 |
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#define MXT_PROCI_TOUCHSUPPRESSION_T42 42 |
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#define MXT_PROCI_STYLUS_T47 47 |
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#define MXT_PROCG_NOISESUPPRESSION_T48 48 |
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#define MXT_SPT_COMMSCONFIG_T18 18 |
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#define MXT_SPT_GPIOPWM_T19 19 |
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#define MXT_SPT_SELFTEST_T25 25 |
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#define MXT_SPT_CTECONFIG_T28 28 |
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#define MXT_SPT_USERDATA_T38 38 |
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#define MXT_SPT_DIGITIZER_T43 43 |
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#define MXT_SPT_MESSAGECOUNT_T44 44 |
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#define MXT_SPT_CTECONFIG_T46 46 |
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#define MXT_SPT_DYNAMICCONFIGURATIONCONTAINER_T71 71 |
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#define MXT_TOUCH_MULTITOUCHSCREEN_T100 100 |
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|
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/* MXT_GEN_MESSAGE_T5 object */ |
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#define MXT_RPTID_NOMSG 0xff |
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|
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/* MXT_GEN_COMMAND_T6 field */ |
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#define MXT_COMMAND_RESET 0 |
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#define MXT_COMMAND_BACKUPNV 1 |
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#define MXT_COMMAND_CALIBRATE 2 |
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#define MXT_COMMAND_REPORTALL 3 |
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#define MXT_COMMAND_DIAGNOSTIC 5 |
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|
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/* Define for T6 status byte */ |
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#define MXT_T6_STATUS_RESET BIT(7) |
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#define MXT_T6_STATUS_OFL BIT(6) |
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#define MXT_T6_STATUS_SIGERR BIT(5) |
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#define MXT_T6_STATUS_CAL BIT(4) |
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#define MXT_T6_STATUS_CFGERR BIT(3) |
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#define MXT_T6_STATUS_COMSERR BIT(2) |
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|
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/* MXT_GEN_POWER_T7 field */ |
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struct t7_config { |
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u8 idle; |
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u8 active; |
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} __packed; |
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|
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#define MXT_POWER_CFG_RUN 0 |
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#define MXT_POWER_CFG_DEEPSLEEP 1 |
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|
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/* MXT_TOUCH_MULTI_T9 field */ |
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#define MXT_T9_CTRL 0 |
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#define MXT_T9_XSIZE 3 |
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#define MXT_T9_YSIZE 4 |
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#define MXT_T9_ORIENT 9 |
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#define MXT_T9_RANGE 18 |
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|
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/* MXT_TOUCH_MULTI_T9 status */ |
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#define MXT_T9_UNGRIP BIT(0) |
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#define MXT_T9_SUPPRESS BIT(1) |
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#define MXT_T9_AMP BIT(2) |
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#define MXT_T9_VECTOR BIT(3) |
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#define MXT_T9_MOVE BIT(4) |
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#define MXT_T9_RELEASE BIT(5) |
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#define MXT_T9_PRESS BIT(6) |
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#define MXT_T9_DETECT BIT(7) |
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|
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struct t9_range { |
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__le16 x; |
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__le16 y; |
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} __packed; |
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|
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/* MXT_TOUCH_MULTI_T9 orient */ |
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#define MXT_T9_ORIENT_SWITCH BIT(0) |
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#define MXT_T9_ORIENT_INVERTX BIT(1) |
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#define MXT_T9_ORIENT_INVERTY BIT(2) |
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|
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/* MXT_SPT_COMMSCONFIG_T18 */ |
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#define MXT_COMMS_CTRL 0 |
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#define MXT_COMMS_CMD 1 |
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#define MXT_COMMS_RETRIGEN BIT(6) |
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|
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/* MXT_DEBUG_DIAGNOSTIC_T37 */ |
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#define MXT_DIAGNOSTIC_PAGEUP 0x01 |
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#define MXT_DIAGNOSTIC_DELTAS 0x10 |
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#define MXT_DIAGNOSTIC_REFS 0x11 |
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#define MXT_DIAGNOSTIC_SIZE 128 |
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|
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#define MXT_FAMILY_1386 160 |
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#define MXT1386_COLUMNS 3 |
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#define MXT1386_PAGES_PER_COLUMN 8 |
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struct t37_debug { |
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#ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37 |
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u8 mode; |
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u8 page; |
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u8 data[MXT_DIAGNOSTIC_SIZE]; |
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#endif |
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}; |
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|
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/* Define for MXT_GEN_COMMAND_T6 */ |
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#define MXT_BOOT_VALUE 0xa5 |
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#define MXT_RESET_VALUE 0x01 |
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#define MXT_BACKUP_VALUE 0x55 |
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|
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/* T100 Multiple Touch Touchscreen */ |
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#define MXT_T100_CTRL 0 |
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#define MXT_T100_CFG1 1 |
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#define MXT_T100_TCHAUX 3 |
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#define MXT_T100_XSIZE 9 |
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#define MXT_T100_XRANGE 13 |
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#define MXT_T100_YSIZE 20 |
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#define MXT_T100_YRANGE 24 |
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|
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#define MXT_T100_CFG_SWITCHXY BIT(5) |
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#define MXT_T100_CFG_INVERTY BIT(6) |
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#define MXT_T100_CFG_INVERTX BIT(7) |
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|
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#define MXT_T100_TCHAUX_VECT BIT(0) |
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#define MXT_T100_TCHAUX_AMPL BIT(1) |
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#define MXT_T100_TCHAUX_AREA BIT(2) |
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|
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#define MXT_T100_DETECT BIT(7) |
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#define MXT_T100_TYPE_MASK 0x70 |
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|
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enum t100_type { |
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MXT_T100_TYPE_FINGER = 1, |
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MXT_T100_TYPE_PASSIVE_STYLUS = 2, |
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MXT_T100_TYPE_HOVERING_FINGER = 4, |
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MXT_T100_TYPE_GLOVE = 5, |
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MXT_T100_TYPE_LARGE_TOUCH = 6, |
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}; |
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#define MXT_DISTANCE_ACTIVE_TOUCH 0 |
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#define MXT_DISTANCE_HOVERING 1 |
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|
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#define MXT_TOUCH_MAJOR_DEFAULT 1 |
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#define MXT_PRESSURE_DEFAULT 1 |
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|
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/* Delay times */ |
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#define MXT_BACKUP_TIME 50 /* msec */ |
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#define MXT_RESET_GPIO_TIME 20 /* msec */ |
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#define MXT_RESET_INVALID_CHG 100 /* msec */ |
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#define MXT_RESET_TIME 200 /* msec */ |
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#define MXT_RESET_TIMEOUT 3000 /* msec */ |
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#define MXT_CRC_TIMEOUT 1000 /* msec */ |
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#define MXT_FW_RESET_TIME 3000 /* msec */ |
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#define MXT_FW_CHG_TIMEOUT 300 /* msec */ |
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|
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/* Command to unlock bootloader */ |
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#define MXT_UNLOCK_CMD_MSB 0xaa |
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#define MXT_UNLOCK_CMD_LSB 0xdc |
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|
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/* Bootloader mode status */ |
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#define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */ |
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#define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */ |
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#define MXT_FRAME_CRC_CHECK 0x02 |
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#define MXT_FRAME_CRC_FAIL 0x03 |
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#define MXT_FRAME_CRC_PASS 0x04 |
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#define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */ |
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#define MXT_BOOT_STATUS_MASK 0x3f |
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#define MXT_BOOT_EXTENDED_ID BIT(5) |
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#define MXT_BOOT_ID_MASK 0x1f |
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|
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/* Touchscreen absolute values */ |
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#define MXT_MAX_AREA 0xff |
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|
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#define MXT_PIXELS_PER_MM 20 |
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|
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struct mxt_info { |
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u8 family_id; |
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u8 variant_id; |
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u8 version; |
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u8 build; |
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u8 matrix_xsize; |
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u8 matrix_ysize; |
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u8 object_num; |
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}; |
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struct mxt_object { |
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u8 type; |
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u16 start_address; |
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u8 size_minus_one; |
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u8 instances_minus_one; |
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u8 num_report_ids; |
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} __packed; |
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struct mxt_dbg { |
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u16 t37_address; |
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u16 diag_cmd_address; |
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struct t37_debug *t37_buf; |
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unsigned int t37_pages; |
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unsigned int t37_nodes; |
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struct v4l2_device v4l2; |
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struct v4l2_pix_format format; |
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struct video_device vdev; |
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struct vb2_queue queue; |
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struct mutex lock; |
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int input; |
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}; |
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enum v4l_dbg_inputs { |
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MXT_V4L_INPUT_DELTAS, |
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MXT_V4L_INPUT_REFS, |
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MXT_V4L_INPUT_MAX, |
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}; |
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enum mxt_suspend_mode { |
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MXT_SUSPEND_DEEP_SLEEP = 0, |
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MXT_SUSPEND_T9_CTRL = 1, |
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}; |
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/* Config update context */ |
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struct mxt_cfg { |
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u8 *raw; |
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size_t raw_size; |
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off_t raw_pos; |
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u8 *mem; |
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size_t mem_size; |
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int start_ofs; |
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struct mxt_info info; |
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}; |
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/* Each client has this additional data */ |
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struct mxt_data { |
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struct i2c_client *client; |
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struct input_dev *input_dev; |
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char phys[64]; /* device physical location */ |
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struct mxt_object *object_table; |
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struct mxt_info *info; |
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void *raw_info_block; |
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unsigned int irq; |
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unsigned int max_x; |
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unsigned int max_y; |
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bool invertx; |
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bool inverty; |
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bool xy_switch; |
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u8 xsize; |
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u8 ysize; |
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bool in_bootloader; |
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u16 mem_size; |
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u8 t100_aux_ampl; |
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u8 t100_aux_area; |
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u8 t100_aux_vect; |
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u8 max_reportid; |
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u32 config_crc; |
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u32 info_crc; |
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u8 bootloader_addr; |
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u8 *msg_buf; |
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u8 t6_status; |
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bool update_input; |
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u8 last_message_count; |
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u8 num_touchids; |
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u8 multitouch; |
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struct t7_config t7_cfg; |
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struct mxt_dbg dbg; |
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struct regulator_bulk_data regulators[2]; |
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struct gpio_desc *reset_gpio; |
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bool use_retrigen_workaround; |
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/* Cached parameters from object table */ |
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u16 T5_address; |
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u8 T5_msg_size; |
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u8 T6_reportid; |
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u16 T6_address; |
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u16 T7_address; |
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u16 T71_address; |
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u8 T9_reportid_min; |
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u8 T9_reportid_max; |
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u16 T18_address; |
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u8 T19_reportid; |
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u16 T44_address; |
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u8 T100_reportid_min; |
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u8 T100_reportid_max; |
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|
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/* for fw update in bootloader */ |
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struct completion bl_completion; |
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|
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/* for reset handling */ |
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struct completion reset_completion; |
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|
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/* for config update handling */ |
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struct completion crc_completion; |
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u32 *t19_keymap; |
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unsigned int t19_num_keys; |
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enum mxt_suspend_mode suspend_mode; |
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}; |
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struct mxt_vb2_buffer { |
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struct vb2_buffer vb; |
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struct list_head list; |
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}; |
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static size_t mxt_obj_size(const struct mxt_object *obj) |
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{ |
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return obj->size_minus_one + 1; |
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} |
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static size_t mxt_obj_instances(const struct mxt_object *obj) |
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{ |
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return obj->instances_minus_one + 1; |
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} |
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static bool mxt_object_readable(unsigned int type) |
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{ |
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switch (type) { |
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case MXT_GEN_COMMAND_T6: |
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case MXT_GEN_POWER_T7: |
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case MXT_GEN_ACQUIRE_T8: |
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case MXT_GEN_DATASOURCE_T53: |
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case MXT_TOUCH_MULTI_T9: |
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case MXT_TOUCH_KEYARRAY_T15: |
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case MXT_TOUCH_PROXIMITY_T23: |
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case MXT_TOUCH_PROXKEY_T52: |
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case MXT_TOUCH_MULTITOUCHSCREEN_T100: |
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case MXT_PROCI_GRIPFACE_T20: |
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case MXT_PROCG_NOISE_T22: |
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case MXT_PROCI_ONETOUCH_T24: |
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case MXT_PROCI_TWOTOUCH_T27: |
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case MXT_PROCI_GRIP_T40: |
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case MXT_PROCI_PALM_T41: |
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case MXT_PROCI_TOUCHSUPPRESSION_T42: |
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case MXT_PROCI_STYLUS_T47: |
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case MXT_PROCG_NOISESUPPRESSION_T48: |
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case MXT_SPT_COMMSCONFIG_T18: |
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case MXT_SPT_GPIOPWM_T19: |
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case MXT_SPT_SELFTEST_T25: |
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case MXT_SPT_CTECONFIG_T28: |
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case MXT_SPT_USERDATA_T38: |
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case MXT_SPT_DIGITIZER_T43: |
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case MXT_SPT_CTECONFIG_T46: |
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case MXT_SPT_DYNAMICCONFIGURATIONCONTAINER_T71: |
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return true; |
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default: |
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return false; |
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} |
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} |
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static void mxt_dump_message(struct mxt_data *data, u8 *message) |
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{ |
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dev_dbg(&data->client->dev, "message: %*ph\n", |
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data->T5_msg_size, message); |
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} |
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static int mxt_wait_for_completion(struct mxt_data *data, |
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struct completion *comp, |
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unsigned int timeout_ms) |
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{ |
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struct device *dev = &data->client->dev; |
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unsigned long timeout = msecs_to_jiffies(timeout_ms); |
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long ret; |
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ret = wait_for_completion_interruptible_timeout(comp, timeout); |
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if (ret < 0) { |
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return ret; |
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} else if (ret == 0) { |
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dev_err(dev, "Wait for completion timed out.\n"); |
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return -ETIMEDOUT; |
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} |
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return 0; |
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} |
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static int mxt_bootloader_read(struct mxt_data *data, |
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u8 *val, unsigned int count) |
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{ |
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int ret; |
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struct i2c_msg msg; |
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|
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msg.addr = data->bootloader_addr; |
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msg.flags = data->client->flags & I2C_M_TEN; |
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msg.flags |= I2C_M_RD; |
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msg.len = count; |
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msg.buf = val; |
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ret = i2c_transfer(data->client->adapter, &msg, 1); |
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if (ret == 1) { |
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ret = 0; |
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} else { |
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ret = ret < 0 ? ret : -EIO; |
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dev_err(&data->client->dev, "%s: i2c recv failed (%d)\n", |
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__func__, ret); |
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} |
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|
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return ret; |
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} |
|
|
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static int mxt_bootloader_write(struct mxt_data *data, |
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const u8 * const val, unsigned int count) |
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{ |
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int ret; |
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struct i2c_msg msg; |
|
|
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msg.addr = data->bootloader_addr; |
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msg.flags = data->client->flags & I2C_M_TEN; |
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msg.len = count; |
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msg.buf = (u8 *)val; |
|
|
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ret = i2c_transfer(data->client->adapter, &msg, 1); |
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if (ret == 1) { |
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ret = 0; |
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} else { |
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ret = ret < 0 ? ret : -EIO; |
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dev_err(&data->client->dev, "%s: i2c send failed (%d)\n", |
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__func__, ret); |
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} |
|
|
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return ret; |
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} |
|
|
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static int mxt_lookup_bootloader_address(struct mxt_data *data, bool retry) |
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{ |
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u8 appmode = data->client->addr; |
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u8 bootloader; |
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u8 family_id = data->info ? data->info->family_id : 0; |
|
|
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switch (appmode) { |
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case 0x4a: |
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case 0x4b: |
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/* Chips after 1664S use different scheme */ |
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if (retry || family_id >= 0xa2) { |
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bootloader = appmode - 0x24; |
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break; |
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} |
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fallthrough; /* for normal case */ |
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case 0x4c: |
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case 0x4d: |
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case 0x5a: |
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case 0x5b: |
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bootloader = appmode - 0x26; |
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break; |
|
|
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default: |
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dev_err(&data->client->dev, |
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"Appmode i2c address 0x%02x not found\n", |
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appmode); |
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return -EINVAL; |
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} |
|
|
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data->bootloader_addr = bootloader; |
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return 0; |
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} |
|
|
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static int mxt_probe_bootloader(struct mxt_data *data, bool alt_address) |
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{ |
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struct device *dev = &data->client->dev; |
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int error; |
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u8 val; |
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bool crc_failure; |
|
|
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error = mxt_lookup_bootloader_address(data, alt_address); |
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if (error) |
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return error; |
|
|
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error = mxt_bootloader_read(data, &val, 1); |
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if (error) |
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return error; |
|
|
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/* Check app crc fail mode */ |
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crc_failure = (val & ~MXT_BOOT_STATUS_MASK) == MXT_APP_CRC_FAIL; |
|
|
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dev_err(dev, "Detected bootloader, status:%02X%s\n", |
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val, crc_failure ? ", APP_CRC_FAIL" : ""); |
|
|
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return 0; |
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} |
|
|
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static u8 mxt_get_bootloader_version(struct mxt_data *data, u8 val) |
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{ |
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struct device *dev = &data->client->dev; |
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u8 buf[3]; |
|
|
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if (val & MXT_BOOT_EXTENDED_ID) { |
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if (mxt_bootloader_read(data, &buf[0], 3) != 0) { |
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dev_err(dev, "%s: i2c failure\n", __func__); |
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return val; |
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} |
|
|
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dev_dbg(dev, "Bootloader ID:%d Version:%d\n", buf[1], buf[2]); |
|
|
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return buf[0]; |
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} else { |
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dev_dbg(dev, "Bootloader ID:%d\n", val & MXT_BOOT_ID_MASK); |
|
|
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return val; |
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} |
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} |
|
|
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static int mxt_check_bootloader(struct mxt_data *data, unsigned int state, |
|
bool wait) |
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{ |
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struct device *dev = &data->client->dev; |
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u8 val; |
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int ret; |
|
|
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recheck: |
|
if (wait) { |
|
/* |
|
* In application update mode, the interrupt |
|
* line signals state transitions. We must wait for the |
|
* CHG assertion before reading the status byte. |
|
* Once the status byte has been read, the line is deasserted. |
|
*/ |
|
ret = mxt_wait_for_completion(data, &data->bl_completion, |
|
MXT_FW_CHG_TIMEOUT); |
|
if (ret) { |
|
/* |
|
* TODO: handle -ERESTARTSYS better by terminating |
|
* fw update process before returning to userspace |
|
* by writing length 0x000 to device (iff we are in |
|
* WAITING_FRAME_DATA state). |
|
*/ |
|
dev_err(dev, "Update wait error %d\n", ret); |
|
return ret; |
|
} |
|
} |
|
|
|
ret = mxt_bootloader_read(data, &val, 1); |
|
if (ret) |
|
return ret; |
|
|
|
if (state == MXT_WAITING_BOOTLOAD_CMD) |
|
val = mxt_get_bootloader_version(data, val); |
|
|
|
switch (state) { |
|
case MXT_WAITING_BOOTLOAD_CMD: |
|
case MXT_WAITING_FRAME_DATA: |
|
case MXT_APP_CRC_FAIL: |
|
val &= ~MXT_BOOT_STATUS_MASK; |
|
break; |
|
case MXT_FRAME_CRC_PASS: |
|
if (val == MXT_FRAME_CRC_CHECK) { |
|
goto recheck; |
|
} else if (val == MXT_FRAME_CRC_FAIL) { |
|
dev_err(dev, "Bootloader CRC fail\n"); |
|
return -EINVAL; |
|
} |
|
break; |
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
if (val != state) { |
|
dev_err(dev, "Invalid bootloader state %02X != %02X\n", |
|
val, state); |
|
return -EINVAL; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int mxt_send_bootloader_cmd(struct mxt_data *data, bool unlock) |
|
{ |
|
u8 buf[2]; |
|
|
|
if (unlock) { |
|
buf[0] = MXT_UNLOCK_CMD_LSB; |
|
buf[1] = MXT_UNLOCK_CMD_MSB; |
|
} else { |
|
buf[0] = 0x01; |
|
buf[1] = 0x01; |
|
} |
|
|
|
return mxt_bootloader_write(data, buf, sizeof(buf)); |
|
} |
|
|
|
static int __mxt_read_reg(struct i2c_client *client, |
|
u16 reg, u16 len, void *val) |
|
{ |
|
struct i2c_msg xfer[2]; |
|
u8 buf[2]; |
|
int ret; |
|
|
|
buf[0] = reg & 0xff; |
|
buf[1] = (reg >> 8) & 0xff; |
|
|
|
/* Write register */ |
|
xfer[0].addr = client->addr; |
|
xfer[0].flags = 0; |
|
xfer[0].len = 2; |
|
xfer[0].buf = buf; |
|
|
|
/* Read data */ |
|
xfer[1].addr = client->addr; |
|
xfer[1].flags = I2C_M_RD; |
|
xfer[1].len = len; |
|
xfer[1].buf = val; |
|
|
|
ret = i2c_transfer(client->adapter, xfer, 2); |
|
if (ret == 2) { |
|
ret = 0; |
|
} else { |
|
if (ret >= 0) |
|
ret = -EIO; |
|
dev_err(&client->dev, "%s: i2c transfer failed (%d)\n", |
|
__func__, ret); |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len, |
|
const void *val) |
|
{ |
|
u8 *buf; |
|
size_t count; |
|
int ret; |
|
|
|
count = len + 2; |
|
buf = kmalloc(count, GFP_KERNEL); |
|
if (!buf) |
|
return -ENOMEM; |
|
|
|
buf[0] = reg & 0xff; |
|
buf[1] = (reg >> 8) & 0xff; |
|
memcpy(&buf[2], val, len); |
|
|
|
ret = i2c_master_send(client, buf, count); |
|
if (ret == count) { |
|
ret = 0; |
|
} else { |
|
if (ret >= 0) |
|
ret = -EIO; |
|
dev_err(&client->dev, "%s: i2c send failed (%d)\n", |
|
__func__, ret); |
|
} |
|
|
|
kfree(buf); |
|
return ret; |
|
} |
|
|
|
static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val) |
|
{ |
|
return __mxt_write_reg(client, reg, 1, &val); |
|
} |
|
|
|
static struct mxt_object * |
|
mxt_get_object(struct mxt_data *data, u8 type) |
|
{ |
|
struct mxt_object *object; |
|
int i; |
|
|
|
for (i = 0; i < data->info->object_num; i++) { |
|
object = data->object_table + i; |
|
if (object->type == type) |
|
return object; |
|
} |
|
|
|
dev_warn(&data->client->dev, "Invalid object type T%u\n", type); |
|
return NULL; |
|
} |
|
|
|
static void mxt_proc_t6_messages(struct mxt_data *data, u8 *msg) |
|
{ |
|
struct device *dev = &data->client->dev; |
|
u8 status = msg[1]; |
|
u32 crc = msg[2] | (msg[3] << 8) | (msg[4] << 16); |
|
|
|
if (crc != data->config_crc) { |
|
data->config_crc = crc; |
|
dev_dbg(dev, "T6 Config Checksum: 0x%06X\n", crc); |
|
} |
|
|
|
complete(&data->crc_completion); |
|
|
|
/* Detect reset */ |
|
if (status & MXT_T6_STATUS_RESET) |
|
complete(&data->reset_completion); |
|
|
|
/* Output debug if status has changed */ |
|
if (status != data->t6_status) |
|
dev_dbg(dev, "T6 Status 0x%02X%s%s%s%s%s%s%s\n", |
|
status, |
|
status == 0 ? " OK" : "", |
|
status & MXT_T6_STATUS_RESET ? " RESET" : "", |
|
status & MXT_T6_STATUS_OFL ? " OFL" : "", |
|
status & MXT_T6_STATUS_SIGERR ? " SIGERR" : "", |
|
status & MXT_T6_STATUS_CAL ? " CAL" : "", |
|
status & MXT_T6_STATUS_CFGERR ? " CFGERR" : "", |
|
status & MXT_T6_STATUS_COMSERR ? " COMSERR" : ""); |
|
|
|
/* Save current status */ |
|
data->t6_status = status; |
|
} |
|
|
|
static int mxt_write_object(struct mxt_data *data, |
|
u8 type, u8 offset, u8 val) |
|
{ |
|
struct mxt_object *object; |
|
u16 reg; |
|
|
|
object = mxt_get_object(data, type); |
|
if (!object || offset >= mxt_obj_size(object)) |
|
return -EINVAL; |
|
|
|
reg = object->start_address; |
|
return mxt_write_reg(data->client, reg + offset, val); |
|
} |
|
|
|
static void mxt_input_button(struct mxt_data *data, u8 *message) |
|
{ |
|
struct input_dev *input = data->input_dev; |
|
int i; |
|
|
|
for (i = 0; i < data->t19_num_keys; i++) { |
|
if (data->t19_keymap[i] == KEY_RESERVED) |
|
continue; |
|
|
|
/* Active-low switch */ |
|
input_report_key(input, data->t19_keymap[i], |
|
!(message[1] & BIT(i))); |
|
} |
|
} |
|
|
|
static void mxt_input_sync(struct mxt_data *data) |
|
{ |
|
input_mt_report_pointer_emulation(data->input_dev, |
|
data->t19_num_keys); |
|
input_sync(data->input_dev); |
|
} |
|
|
|
static void mxt_proc_t9_message(struct mxt_data *data, u8 *message) |
|
{ |
|
struct device *dev = &data->client->dev; |
|
struct input_dev *input_dev = data->input_dev; |
|
int id; |
|
u8 status; |
|
int x; |
|
int y; |
|
int area; |
|
int amplitude; |
|
|
|
id = message[0] - data->T9_reportid_min; |
|
status = message[1]; |
|
x = (message[2] << 4) | ((message[4] >> 4) & 0xf); |
|
y = (message[3] << 4) | ((message[4] & 0xf)); |
|
|
|
/* Handle 10/12 bit switching */ |
|
if (data->max_x < 1024) |
|
x >>= 2; |
|
if (data->max_y < 1024) |
|
y >>= 2; |
|
|
|
area = message[5]; |
|
amplitude = message[6]; |
|
|
|
dev_dbg(dev, |
|
"[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u\n", |
|
id, |
|
(status & MXT_T9_DETECT) ? 'D' : '.', |
|
(status & MXT_T9_PRESS) ? 'P' : '.', |
|
(status & MXT_T9_RELEASE) ? 'R' : '.', |
|
(status & MXT_T9_MOVE) ? 'M' : '.', |
|
(status & MXT_T9_VECTOR) ? 'V' : '.', |
|
(status & MXT_T9_AMP) ? 'A' : '.', |
|
(status & MXT_T9_SUPPRESS) ? 'S' : '.', |
|
(status & MXT_T9_UNGRIP) ? 'U' : '.', |
|
x, y, area, amplitude); |
|
|
|
input_mt_slot(input_dev, id); |
|
|
|
if (status & MXT_T9_DETECT) { |
|
/* |
|
* Multiple bits may be set if the host is slow to read |
|
* the status messages, indicating all the events that |
|
* have happened. |
|
*/ |
|
if (status & MXT_T9_RELEASE) { |
|
input_mt_report_slot_inactive(input_dev); |
|
mxt_input_sync(data); |
|
} |
|
|
|
/* if active, pressure must be non-zero */ |
|
if (!amplitude) |
|
amplitude = MXT_PRESSURE_DEFAULT; |
|
|
|
/* Touch active */ |
|
input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 1); |
|
input_report_abs(input_dev, ABS_MT_POSITION_X, x); |
|
input_report_abs(input_dev, ABS_MT_POSITION_Y, y); |
|
input_report_abs(input_dev, ABS_MT_PRESSURE, amplitude); |
|
input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area); |
|
} else { |
|
/* Touch no longer active, close out slot */ |
|
input_mt_report_slot_inactive(input_dev); |
|
} |
|
|
|
data->update_input = true; |
|
} |
|
|
|
static void mxt_proc_t100_message(struct mxt_data *data, u8 *message) |
|
{ |
|
struct device *dev = &data->client->dev; |
|
struct input_dev *input_dev = data->input_dev; |
|
int id; |
|
u8 status; |
|
u8 type = 0; |
|
u16 x; |
|
u16 y; |
|
int distance = 0; |
|
int tool = 0; |
|
u8 major = 0; |
|
u8 pressure = 0; |
|
u8 orientation = 0; |
|
|
|
id = message[0] - data->T100_reportid_min - 2; |
|
|
|
/* ignore SCRSTATUS events */ |
|
if (id < 0) |
|
return; |
|
|
|
status = message[1]; |
|
x = get_unaligned_le16(&message[2]); |
|
y = get_unaligned_le16(&message[4]); |
|
|
|
if (status & MXT_T100_DETECT) { |
|
type = (status & MXT_T100_TYPE_MASK) >> 4; |
|
|
|
switch (type) { |
|
case MXT_T100_TYPE_HOVERING_FINGER: |
|
tool = MT_TOOL_FINGER; |
|
distance = MXT_DISTANCE_HOVERING; |
|
|
|
if (data->t100_aux_vect) |
|
orientation = message[data->t100_aux_vect]; |
|
|
|
break; |
|
|
|
case MXT_T100_TYPE_FINGER: |
|
case MXT_T100_TYPE_GLOVE: |
|
tool = MT_TOOL_FINGER; |
|
distance = MXT_DISTANCE_ACTIVE_TOUCH; |
|
|
|
if (data->t100_aux_area) |
|
major = message[data->t100_aux_area]; |
|
|
|
if (data->t100_aux_ampl) |
|
pressure = message[data->t100_aux_ampl]; |
|
|
|
if (data->t100_aux_vect) |
|
orientation = message[data->t100_aux_vect]; |
|
|
|
break; |
|
|
|
case MXT_T100_TYPE_PASSIVE_STYLUS: |
|
tool = MT_TOOL_PEN; |
|
|
|
/* |
|
* Passive stylus is reported with size zero so |
|
* hardcode. |
|
*/ |
|
major = MXT_TOUCH_MAJOR_DEFAULT; |
|
|
|
if (data->t100_aux_ampl) |
|
pressure = message[data->t100_aux_ampl]; |
|
|
|
break; |
|
|
|
case MXT_T100_TYPE_LARGE_TOUCH: |
|
/* Ignore suppressed touch */ |
|
break; |
|
|
|
default: |
|
dev_dbg(dev, "Unexpected T100 type\n"); |
|
return; |
|
} |
|
} |
|
|
|
/* |
|
* Values reported should be non-zero if tool is touching the |
|
* device |
|
*/ |
|
if (!pressure && type != MXT_T100_TYPE_HOVERING_FINGER) |
|
pressure = MXT_PRESSURE_DEFAULT; |
|
|
|
input_mt_slot(input_dev, id); |
|
|
|
if (status & MXT_T100_DETECT) { |
|
dev_dbg(dev, "[%u] type:%u x:%u y:%u a:%02X p:%02X v:%02X\n", |
|
id, type, x, y, major, pressure, orientation); |
|
|
|
input_mt_report_slot_state(input_dev, tool, 1); |
|
input_report_abs(input_dev, ABS_MT_POSITION_X, x); |
|
input_report_abs(input_dev, ABS_MT_POSITION_Y, y); |
|
input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, major); |
|
input_report_abs(input_dev, ABS_MT_PRESSURE, pressure); |
|
input_report_abs(input_dev, ABS_MT_DISTANCE, distance); |
|
input_report_abs(input_dev, ABS_MT_ORIENTATION, orientation); |
|
} else { |
|
dev_dbg(dev, "[%u] release\n", id); |
|
|
|
/* close out slot */ |
|
input_mt_report_slot_inactive(input_dev); |
|
} |
|
|
|
data->update_input = true; |
|
} |
|
|
|
static int mxt_proc_message(struct mxt_data *data, u8 *message) |
|
{ |
|
u8 report_id = message[0]; |
|
|
|
if (report_id == MXT_RPTID_NOMSG) |
|
return 0; |
|
|
|
if (report_id == data->T6_reportid) { |
|
mxt_proc_t6_messages(data, message); |
|
} else if (!data->input_dev) { |
|
/* |
|
* Do not report events if input device |
|
* is not yet registered. |
|
*/ |
|
mxt_dump_message(data, message); |
|
} else if (report_id >= data->T9_reportid_min && |
|
report_id <= data->T9_reportid_max) { |
|
mxt_proc_t9_message(data, message); |
|
} else if (report_id >= data->T100_reportid_min && |
|
report_id <= data->T100_reportid_max) { |
|
mxt_proc_t100_message(data, message); |
|
} else if (report_id == data->T19_reportid) { |
|
mxt_input_button(data, message); |
|
data->update_input = true; |
|
} else { |
|
mxt_dump_message(data, message); |
|
} |
|
|
|
return 1; |
|
} |
|
|
|
static int mxt_read_and_process_messages(struct mxt_data *data, u8 count) |
|
{ |
|
struct device *dev = &data->client->dev; |
|
int ret; |
|
int i; |
|
u8 num_valid = 0; |
|
|
|
/* Safety check for msg_buf */ |
|
if (count > data->max_reportid) |
|
return -EINVAL; |
|
|
|
/* Process remaining messages if necessary */ |
|
ret = __mxt_read_reg(data->client, data->T5_address, |
|
data->T5_msg_size * count, data->msg_buf); |
|
if (ret) { |
|
dev_err(dev, "Failed to read %u messages (%d)\n", count, ret); |
|
return ret; |
|
} |
|
|
|
for (i = 0; i < count; i++) { |
|
ret = mxt_proc_message(data, |
|
data->msg_buf + data->T5_msg_size * i); |
|
|
|
if (ret == 1) |
|
num_valid++; |
|
} |
|
|
|
/* return number of messages read */ |
|
return num_valid; |
|
} |
|
|
|
static irqreturn_t mxt_process_messages_t44(struct mxt_data *data) |
|
{ |
|
struct device *dev = &data->client->dev; |
|
int ret; |
|
u8 count, num_left; |
|
|
|
/* Read T44 and T5 together */ |
|
ret = __mxt_read_reg(data->client, data->T44_address, |
|
data->T5_msg_size + 1, data->msg_buf); |
|
if (ret) { |
|
dev_err(dev, "Failed to read T44 and T5 (%d)\n", ret); |
|
return IRQ_NONE; |
|
} |
|
|
|
count = data->msg_buf[0]; |
|
|
|
/* |
|
* This condition may be caused by the CHG line being configured in |
|
* Mode 0. It results in unnecessary I2C operations but it is benign. |
|
*/ |
|
if (count == 0) |
|
return IRQ_NONE; |
|
|
|
if (count > data->max_reportid) { |
|
dev_warn(dev, "T44 count %d exceeded max report id\n", count); |
|
count = data->max_reportid; |
|
} |
|
|
|
/* Process first message */ |
|
ret = mxt_proc_message(data, data->msg_buf + 1); |
|
if (ret < 0) { |
|
dev_warn(dev, "Unexpected invalid message\n"); |
|
return IRQ_NONE; |
|
} |
|
|
|
num_left = count - 1; |
|
|
|
/* Process remaining messages if necessary */ |
|
if (num_left) { |
|
ret = mxt_read_and_process_messages(data, num_left); |
|
if (ret < 0) |
|
goto end; |
|
else if (ret != num_left) |
|
dev_warn(dev, "Unexpected invalid message\n"); |
|
} |
|
|
|
end: |
|
if (data->update_input) { |
|
mxt_input_sync(data); |
|
data->update_input = false; |
|
} |
|
|
|
return IRQ_HANDLED; |
|
} |
|
|
|
static int mxt_process_messages_until_invalid(struct mxt_data *data) |
|
{ |
|
struct device *dev = &data->client->dev; |
|
int count, read; |
|
u8 tries = 2; |
|
|
|
count = data->max_reportid; |
|
|
|
/* Read messages until we force an invalid */ |
|
do { |
|
read = mxt_read_and_process_messages(data, count); |
|
if (read < count) |
|
return 0; |
|
} while (--tries); |
|
|
|
if (data->update_input) { |
|
mxt_input_sync(data); |
|
data->update_input = false; |
|
} |
|
|
|
dev_err(dev, "CHG pin isn't cleared\n"); |
|
return -EBUSY; |
|
} |
|
|
|
static irqreturn_t mxt_process_messages(struct mxt_data *data) |
|
{ |
|
int total_handled, num_handled; |
|
u8 count = data->last_message_count; |
|
|
|
if (count < 1 || count > data->max_reportid) |
|
count = 1; |
|
|
|
/* include final invalid message */ |
|
total_handled = mxt_read_and_process_messages(data, count + 1); |
|
if (total_handled < 0) |
|
return IRQ_NONE; |
|
/* if there were invalid messages, then we are done */ |
|
else if (total_handled <= count) |
|
goto update_count; |
|
|
|
/* keep reading two msgs until one is invalid or reportid limit */ |
|
do { |
|
num_handled = mxt_read_and_process_messages(data, 2); |
|
if (num_handled < 0) |
|
return IRQ_NONE; |
|
|
|
total_handled += num_handled; |
|
|
|
if (num_handled < 2) |
|
break; |
|
} while (total_handled < data->num_touchids); |
|
|
|
update_count: |
|
data->last_message_count = total_handled; |
|
|
|
if (data->update_input) { |
|
mxt_input_sync(data); |
|
data->update_input = false; |
|
} |
|
|
|
return IRQ_HANDLED; |
|
} |
|
|
|
static irqreturn_t mxt_interrupt(int irq, void *dev_id) |
|
{ |
|
struct mxt_data *data = dev_id; |
|
|
|
if (data->in_bootloader) { |
|
/* bootloader state transition completion */ |
|
complete(&data->bl_completion); |
|
return IRQ_HANDLED; |
|
} |
|
|
|
if (!data->object_table) |
|
return IRQ_HANDLED; |
|
|
|
if (data->T44_address) { |
|
return mxt_process_messages_t44(data); |
|
} else { |
|
return mxt_process_messages(data); |
|
} |
|
} |
|
|
|
static int mxt_t6_command(struct mxt_data *data, u16 cmd_offset, |
|
u8 value, bool wait) |
|
{ |
|
u16 reg; |
|
u8 command_register; |
|
int timeout_counter = 0; |
|
int ret; |
|
|
|
reg = data->T6_address + cmd_offset; |
|
|
|
ret = mxt_write_reg(data->client, reg, value); |
|
if (ret) |
|
return ret; |
|
|
|
if (!wait) |
|
return 0; |
|
|
|
do { |
|
msleep(20); |
|
ret = __mxt_read_reg(data->client, reg, 1, &command_register); |
|
if (ret) |
|
return ret; |
|
} while (command_register != 0 && timeout_counter++ <= 100); |
|
|
|
if (timeout_counter > 100) { |
|
dev_err(&data->client->dev, "Command failed!\n"); |
|
return -EIO; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int mxt_acquire_irq(struct mxt_data *data) |
|
{ |
|
int error; |
|
|
|
enable_irq(data->irq); |
|
|
|
if (data->use_retrigen_workaround) { |
|
error = mxt_process_messages_until_invalid(data); |
|
if (error) |
|
return error; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int mxt_soft_reset(struct mxt_data *data) |
|
{ |
|
struct device *dev = &data->client->dev; |
|
int ret = 0; |
|
|
|
dev_info(dev, "Resetting device\n"); |
|
|
|
disable_irq(data->irq); |
|
|
|
reinit_completion(&data->reset_completion); |
|
|
|
ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_RESET_VALUE, false); |
|
if (ret) |
|
return ret; |
|
|
|
/* Ignore CHG line for 100ms after reset */ |
|
msleep(MXT_RESET_INVALID_CHG); |
|
|
|
mxt_acquire_irq(data); |
|
|
|
ret = mxt_wait_for_completion(data, &data->reset_completion, |
|
MXT_RESET_TIMEOUT); |
|
if (ret) |
|
return ret; |
|
|
|
return 0; |
|
} |
|
|
|
static void mxt_update_crc(struct mxt_data *data, u8 cmd, u8 value) |
|
{ |
|
/* |
|
* On failure, CRC is set to 0 and config will always be |
|
* downloaded. |
|
*/ |
|
data->config_crc = 0; |
|
reinit_completion(&data->crc_completion); |
|
|
|
mxt_t6_command(data, cmd, value, true); |
|
|
|
/* |
|
* Wait for crc message. On failure, CRC is set to 0 and config will |
|
* always be downloaded. |
|
*/ |
|
mxt_wait_for_completion(data, &data->crc_completion, MXT_CRC_TIMEOUT); |
|
} |
|
|
|
static void mxt_calc_crc24(u32 *crc, u8 firstbyte, u8 secondbyte) |
|
{ |
|
static const unsigned int crcpoly = 0x80001B; |
|
u32 result; |
|
u32 data_word; |
|
|
|
data_word = (secondbyte << 8) | firstbyte; |
|
result = ((*crc << 1) ^ data_word); |
|
|
|
if (result & 0x1000000) |
|
result ^= crcpoly; |
|
|
|
*crc = result; |
|
} |
|
|
|
static u32 mxt_calculate_crc(u8 *base, off_t start_off, off_t end_off) |
|
{ |
|
u32 crc = 0; |
|
u8 *ptr = base + start_off; |
|
u8 *last_val = base + end_off - 1; |
|
|
|
if (end_off < start_off) |
|
return -EINVAL; |
|
|
|
while (ptr < last_val) { |
|
mxt_calc_crc24(&crc, *ptr, *(ptr + 1)); |
|
ptr += 2; |
|
} |
|
|
|
/* if len is odd, fill the last byte with 0 */ |
|
if (ptr == last_val) |
|
mxt_calc_crc24(&crc, *ptr, 0); |
|
|
|
/* Mask to 24-bit */ |
|
crc &= 0x00FFFFFF; |
|
|
|
return crc; |
|
} |
|
|
|
static int mxt_check_retrigen(struct mxt_data *data) |
|
{ |
|
struct i2c_client *client = data->client; |
|
int error; |
|
int val; |
|
struct irq_data *irqd; |
|
|
|
data->use_retrigen_workaround = false; |
|
|
|
irqd = irq_get_irq_data(data->irq); |
|
if (!irqd) |
|
return -EINVAL; |
|
|
|
if (irqd_is_level_type(irqd)) |
|
return 0; |
|
|
|
if (data->T18_address) { |
|
error = __mxt_read_reg(client, |
|
data->T18_address + MXT_COMMS_CTRL, |
|
1, &val); |
|
if (error) |
|
return error; |
|
|
|
if (val & MXT_COMMS_RETRIGEN) |
|
return 0; |
|
} |
|
|
|
dev_warn(&client->dev, "Enabling RETRIGEN workaround\n"); |
|
data->use_retrigen_workaround = true; |
|
return 0; |
|
} |
|
|
|
static int mxt_prepare_cfg_mem(struct mxt_data *data, struct mxt_cfg *cfg) |
|
{ |
|
struct device *dev = &data->client->dev; |
|
struct mxt_object *object; |
|
unsigned int type, instance, size, byte_offset; |
|
int offset; |
|
int ret; |
|
int i; |
|
u16 reg; |
|
u8 val; |
|
|
|
while (cfg->raw_pos < cfg->raw_size) { |
|
/* Read type, instance, length */ |
|
ret = sscanf(cfg->raw + cfg->raw_pos, "%x %x %x%n", |
|
&type, &instance, &size, &offset); |
|
if (ret == 0) { |
|
/* EOF */ |
|
break; |
|
} else if (ret != 3) { |
|
dev_err(dev, "Bad format: failed to parse object\n"); |
|
return -EINVAL; |
|
} |
|
cfg->raw_pos += offset; |
|
|
|
object = mxt_get_object(data, type); |
|
if (!object) { |
|
/* Skip object */ |
|
for (i = 0; i < size; i++) { |
|
ret = sscanf(cfg->raw + cfg->raw_pos, "%hhx%n", |
|
&val, &offset); |
|
if (ret != 1) { |
|
dev_err(dev, "Bad format in T%d at %d\n", |
|
type, i); |
|
return -EINVAL; |
|
} |
|
cfg->raw_pos += offset; |
|
} |
|
continue; |
|
} |
|
|
|
if (size > mxt_obj_size(object)) { |
|
/* |
|
* Either we are in fallback mode due to wrong |
|
* config or config from a later fw version, |
|
* or the file is corrupt or hand-edited. |
|
*/ |
|
dev_warn(dev, "Discarding %zu byte(s) in T%u\n", |
|
size - mxt_obj_size(object), type); |
|
} else if (mxt_obj_size(object) > size) { |
|
/* |
|
* If firmware is upgraded, new bytes may be added to |
|
* end of objects. It is generally forward compatible |
|
* to zero these bytes - previous behaviour will be |
|
* retained. However this does invalidate the CRC and |
|
* will force fallback mode until the configuration is |
|
* updated. We warn here but do nothing else - the |
|
* malloc has zeroed the entire configuration. |
|
*/ |
|
dev_warn(dev, "Zeroing %zu byte(s) in T%d\n", |
|
mxt_obj_size(object) - size, type); |
|
} |
|
|
|
if (instance >= mxt_obj_instances(object)) { |
|
dev_err(dev, "Object instances exceeded!\n"); |
|
return -EINVAL; |
|
} |
|
|
|
reg = object->start_address + mxt_obj_size(object) * instance; |
|
|
|
for (i = 0; i < size; i++) { |
|
ret = sscanf(cfg->raw + cfg->raw_pos, "%hhx%n", |
|
&val, |
|
&offset); |
|
if (ret != 1) { |
|
dev_err(dev, "Bad format in T%d at %d\n", |
|
type, i); |
|
return -EINVAL; |
|
} |
|
cfg->raw_pos += offset; |
|
|
|
if (i > mxt_obj_size(object)) |
|
continue; |
|
|
|
byte_offset = reg + i - cfg->start_ofs; |
|
|
|
if (byte_offset >= 0 && byte_offset < cfg->mem_size) { |
|
*(cfg->mem + byte_offset) = val; |
|
} else { |
|
dev_err(dev, "Bad object: reg:%d, T%d, ofs=%d\n", |
|
reg, object->type, byte_offset); |
|
return -EINVAL; |
|
} |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int mxt_upload_cfg_mem(struct mxt_data *data, struct mxt_cfg *cfg) |
|
{ |
|
unsigned int byte_offset = 0; |
|
int error; |
|
|
|
/* Write configuration as blocks */ |
|
while (byte_offset < cfg->mem_size) { |
|
unsigned int size = cfg->mem_size - byte_offset; |
|
|
|
if (size > MXT_MAX_BLOCK_WRITE) |
|
size = MXT_MAX_BLOCK_WRITE; |
|
|
|
error = __mxt_write_reg(data->client, |
|
cfg->start_ofs + byte_offset, |
|
size, cfg->mem + byte_offset); |
|
if (error) { |
|
dev_err(&data->client->dev, |
|
"Config write error, ret=%d\n", error); |
|
return error; |
|
} |
|
|
|
byte_offset += size; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int mxt_init_t7_power_cfg(struct mxt_data *data); |
|
|
|
/* |
|
* mxt_update_cfg - download configuration to chip |
|
* |
|
* Atmel Raw Config File Format |
|
* |
|
* The first four lines of the raw config file contain: |
|
* 1) Version |
|
* 2) Chip ID Information (first 7 bytes of device memory) |
|
* 3) Chip Information Block 24-bit CRC Checksum |
|
* 4) Chip Configuration 24-bit CRC Checksum |
|
* |
|
* The rest of the file consists of one line per object instance: |
|
* <TYPE> <INSTANCE> <SIZE> <CONTENTS> |
|
* |
|
* <TYPE> - 2-byte object type as hex |
|
* <INSTANCE> - 2-byte object instance number as hex |
|
* <SIZE> - 2-byte object size as hex |
|
* <CONTENTS> - array of <SIZE> 1-byte hex values |
|
*/ |
|
static int mxt_update_cfg(struct mxt_data *data, const struct firmware *fw) |
|
{ |
|
struct device *dev = &data->client->dev; |
|
struct mxt_cfg cfg; |
|
int ret; |
|
int offset; |
|
int i; |
|
u32 info_crc, config_crc, calculated_crc; |
|
u16 crc_start = 0; |
|
|
|
/* Make zero terminated copy of the OBP_RAW file */ |
|
cfg.raw = kmemdup_nul(fw->data, fw->size, GFP_KERNEL); |
|
if (!cfg.raw) |
|
return -ENOMEM; |
|
|
|
cfg.raw_size = fw->size; |
|
|
|
mxt_update_crc(data, MXT_COMMAND_REPORTALL, 1); |
|
|
|
if (strncmp(cfg.raw, MXT_CFG_MAGIC, strlen(MXT_CFG_MAGIC))) { |
|
dev_err(dev, "Unrecognised config file\n"); |
|
ret = -EINVAL; |
|
goto release_raw; |
|
} |
|
|
|
cfg.raw_pos = strlen(MXT_CFG_MAGIC); |
|
|
|
/* Load information block and check */ |
|
for (i = 0; i < sizeof(struct mxt_info); i++) { |
|
ret = sscanf(cfg.raw + cfg.raw_pos, "%hhx%n", |
|
(unsigned char *)&cfg.info + i, |
|
&offset); |
|
if (ret != 1) { |
|
dev_err(dev, "Bad format\n"); |
|
ret = -EINVAL; |
|
goto release_raw; |
|
} |
|
|
|
cfg.raw_pos += offset; |
|
} |
|
|
|
if (cfg.info.family_id != data->info->family_id) { |
|
dev_err(dev, "Family ID mismatch!\n"); |
|
ret = -EINVAL; |
|
goto release_raw; |
|
} |
|
|
|
if (cfg.info.variant_id != data->info->variant_id) { |
|
dev_err(dev, "Variant ID mismatch!\n"); |
|
ret = -EINVAL; |
|
goto release_raw; |
|
} |
|
|
|
/* Read CRCs */ |
|
ret = sscanf(cfg.raw + cfg.raw_pos, "%x%n", &info_crc, &offset); |
|
if (ret != 1) { |
|
dev_err(dev, "Bad format: failed to parse Info CRC\n"); |
|
ret = -EINVAL; |
|
goto release_raw; |
|
} |
|
cfg.raw_pos += offset; |
|
|
|
ret = sscanf(cfg.raw + cfg.raw_pos, "%x%n", &config_crc, &offset); |
|
if (ret != 1) { |
|
dev_err(dev, "Bad format: failed to parse Config CRC\n"); |
|
ret = -EINVAL; |
|
goto release_raw; |
|
} |
|
cfg.raw_pos += offset; |
|
|
|
/* |
|
* The Info Block CRC is calculated over mxt_info and the object |
|
* table. If it does not match then we are trying to load the |
|
* configuration from a different chip or firmware version, so |
|
* the configuration CRC is invalid anyway. |
|
*/ |
|
if (info_crc == data->info_crc) { |
|
if (config_crc == 0 || data->config_crc == 0) { |
|
dev_info(dev, "CRC zero, attempting to apply config\n"); |
|
} else if (config_crc == data->config_crc) { |
|
dev_dbg(dev, "Config CRC 0x%06X: OK\n", |
|
data->config_crc); |
|
ret = 0; |
|
goto release_raw; |
|
} else { |
|
dev_info(dev, "Config CRC 0x%06X: does not match file 0x%06X\n", |
|
data->config_crc, config_crc); |
|
} |
|
} else { |
|
dev_warn(dev, |
|
"Warning: Info CRC error - device=0x%06X file=0x%06X\n", |
|
data->info_crc, info_crc); |
|
} |
|
|
|
/* Malloc memory to store configuration */ |
|
cfg.start_ofs = MXT_OBJECT_START + |
|
data->info->object_num * sizeof(struct mxt_object) + |
|
MXT_INFO_CHECKSUM_SIZE; |
|
cfg.mem_size = data->mem_size - cfg.start_ofs; |
|
cfg.mem = kzalloc(cfg.mem_size, GFP_KERNEL); |
|
if (!cfg.mem) { |
|
ret = -ENOMEM; |
|
goto release_raw; |
|
} |
|
|
|
ret = mxt_prepare_cfg_mem(data, &cfg); |
|
if (ret) |
|
goto release_mem; |
|
|
|
/* Calculate crc of the received configs (not the raw config file) */ |
|
if (data->T71_address) |
|
crc_start = data->T71_address; |
|
else if (data->T7_address) |
|
crc_start = data->T7_address; |
|
else |
|
dev_warn(dev, "Could not find CRC start\n"); |
|
|
|
if (crc_start > cfg.start_ofs) { |
|
calculated_crc = mxt_calculate_crc(cfg.mem, |
|
crc_start - cfg.start_ofs, |
|
cfg.mem_size); |
|
|
|
if (config_crc > 0 && config_crc != calculated_crc) |
|
dev_warn(dev, "Config CRC in file inconsistent, calculated=%06X, file=%06X\n", |
|
calculated_crc, config_crc); |
|
} |
|
|
|
ret = mxt_upload_cfg_mem(data, &cfg); |
|
if (ret) |
|
goto release_mem; |
|
|
|
mxt_update_crc(data, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE); |
|
|
|
ret = mxt_check_retrigen(data); |
|
if (ret) |
|
goto release_mem; |
|
|
|
ret = mxt_soft_reset(data); |
|
if (ret) |
|
goto release_mem; |
|
|
|
dev_info(dev, "Config successfully updated\n"); |
|
|
|
/* T7 config may have changed */ |
|
mxt_init_t7_power_cfg(data); |
|
|
|
release_mem: |
|
kfree(cfg.mem); |
|
release_raw: |
|
kfree(cfg.raw); |
|
return ret; |
|
} |
|
|
|
static void mxt_free_input_device(struct mxt_data *data) |
|
{ |
|
if (data->input_dev) { |
|
input_unregister_device(data->input_dev); |
|
data->input_dev = NULL; |
|
} |
|
} |
|
|
|
static void mxt_free_object_table(struct mxt_data *data) |
|
{ |
|
#ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37 |
|
video_unregister_device(&data->dbg.vdev); |
|
v4l2_device_unregister(&data->dbg.v4l2); |
|
#endif |
|
data->object_table = NULL; |
|
data->info = NULL; |
|
kfree(data->raw_info_block); |
|
data->raw_info_block = NULL; |
|
kfree(data->msg_buf); |
|
data->msg_buf = NULL; |
|
data->T5_address = 0; |
|
data->T5_msg_size = 0; |
|
data->T6_reportid = 0; |
|
data->T7_address = 0; |
|
data->T71_address = 0; |
|
data->T9_reportid_min = 0; |
|
data->T9_reportid_max = 0; |
|
data->T18_address = 0; |
|
data->T19_reportid = 0; |
|
data->T44_address = 0; |
|
data->T100_reportid_min = 0; |
|
data->T100_reportid_max = 0; |
|
data->max_reportid = 0; |
|
} |
|
|
|
static int mxt_parse_object_table(struct mxt_data *data, |
|
struct mxt_object *object_table) |
|
{ |
|
struct i2c_client *client = data->client; |
|
int i; |
|
u8 reportid; |
|
u16 end_address; |
|
|
|
/* Valid Report IDs start counting from 1 */ |
|
reportid = 1; |
|
data->mem_size = 0; |
|
for (i = 0; i < data->info->object_num; i++) { |
|
struct mxt_object *object = object_table + i; |
|
u8 min_id, max_id; |
|
|
|
le16_to_cpus(&object->start_address); |
|
|
|
if (object->num_report_ids) { |
|
min_id = reportid; |
|
reportid += object->num_report_ids * |
|
mxt_obj_instances(object); |
|
max_id = reportid - 1; |
|
} else { |
|
min_id = 0; |
|
max_id = 0; |
|
} |
|
|
|
dev_dbg(&data->client->dev, |
|
"T%u Start:%u Size:%zu Instances:%zu Report IDs:%u-%u\n", |
|
object->type, object->start_address, |
|
mxt_obj_size(object), mxt_obj_instances(object), |
|
min_id, max_id); |
|
|
|
switch (object->type) { |
|
case MXT_GEN_MESSAGE_T5: |
|
if (data->info->family_id == 0x80 && |
|
data->info->version < 0x20) { |
|
/* |
|
* On mXT224 firmware versions prior to V2.0 |
|
* read and discard unused CRC byte otherwise |
|
* DMA reads are misaligned. |
|
*/ |
|
data->T5_msg_size = mxt_obj_size(object); |
|
} else { |
|
/* CRC not enabled, so skip last byte */ |
|
data->T5_msg_size = mxt_obj_size(object) - 1; |
|
} |
|
data->T5_address = object->start_address; |
|
break; |
|
case MXT_GEN_COMMAND_T6: |
|
data->T6_reportid = min_id; |
|
data->T6_address = object->start_address; |
|
break; |
|
case MXT_GEN_POWER_T7: |
|
data->T7_address = object->start_address; |
|
break; |
|
case MXT_SPT_DYNAMICCONFIGURATIONCONTAINER_T71: |
|
data->T71_address = object->start_address; |
|
break; |
|
case MXT_TOUCH_MULTI_T9: |
|
data->multitouch = MXT_TOUCH_MULTI_T9; |
|
/* Only handle messages from first T9 instance */ |
|
data->T9_reportid_min = min_id; |
|
data->T9_reportid_max = min_id + |
|
object->num_report_ids - 1; |
|
data->num_touchids = object->num_report_ids; |
|
break; |
|
case MXT_SPT_COMMSCONFIG_T18: |
|
data->T18_address = object->start_address; |
|
break; |
|
case MXT_SPT_MESSAGECOUNT_T44: |
|
data->T44_address = object->start_address; |
|
break; |
|
case MXT_SPT_GPIOPWM_T19: |
|
data->T19_reportid = min_id; |
|
break; |
|
case MXT_TOUCH_MULTITOUCHSCREEN_T100: |
|
data->multitouch = MXT_TOUCH_MULTITOUCHSCREEN_T100; |
|
data->T100_reportid_min = min_id; |
|
data->T100_reportid_max = max_id; |
|
/* first two report IDs reserved */ |
|
data->num_touchids = object->num_report_ids - 2; |
|
break; |
|
} |
|
|
|
end_address = object->start_address |
|
+ mxt_obj_size(object) * mxt_obj_instances(object) - 1; |
|
|
|
if (end_address >= data->mem_size) |
|
data->mem_size = end_address + 1; |
|
} |
|
|
|
/* Store maximum reportid */ |
|
data->max_reportid = reportid; |
|
|
|
/* If T44 exists, T5 position has to be directly after */ |
|
if (data->T44_address && (data->T5_address != data->T44_address + 1)) { |
|
dev_err(&client->dev, "Invalid T44 position\n"); |
|
return -EINVAL; |
|
} |
|
|
|
data->msg_buf = kcalloc(data->max_reportid, |
|
data->T5_msg_size, GFP_KERNEL); |
|
if (!data->msg_buf) |
|
return -ENOMEM; |
|
|
|
return 0; |
|
} |
|
|
|
static int mxt_read_info_block(struct mxt_data *data) |
|
{ |
|
struct i2c_client *client = data->client; |
|
int error; |
|
size_t size; |
|
void *id_buf, *buf; |
|
uint8_t num_objects; |
|
u32 calculated_crc; |
|
u8 *crc_ptr; |
|
|
|
/* If info block already allocated, free it */ |
|
if (data->raw_info_block) |
|
mxt_free_object_table(data); |
|
|
|
/* Read 7-byte ID information block starting at address 0 */ |
|
size = sizeof(struct mxt_info); |
|
id_buf = kzalloc(size, GFP_KERNEL); |
|
if (!id_buf) |
|
return -ENOMEM; |
|
|
|
error = __mxt_read_reg(client, 0, size, id_buf); |
|
if (error) |
|
goto err_free_mem; |
|
|
|
/* Resize buffer to give space for rest of info block */ |
|
num_objects = ((struct mxt_info *)id_buf)->object_num; |
|
size += (num_objects * sizeof(struct mxt_object)) |
|
+ MXT_INFO_CHECKSUM_SIZE; |
|
|
|
buf = krealloc(id_buf, size, GFP_KERNEL); |
|
if (!buf) { |
|
error = -ENOMEM; |
|
goto err_free_mem; |
|
} |
|
id_buf = buf; |
|
|
|
/* Read rest of info block */ |
|
error = __mxt_read_reg(client, MXT_OBJECT_START, |
|
size - MXT_OBJECT_START, |
|
id_buf + MXT_OBJECT_START); |
|
if (error) |
|
goto err_free_mem; |
|
|
|
/* Extract & calculate checksum */ |
|
crc_ptr = id_buf + size - MXT_INFO_CHECKSUM_SIZE; |
|
data->info_crc = crc_ptr[0] | (crc_ptr[1] << 8) | (crc_ptr[2] << 16); |
|
|
|
calculated_crc = mxt_calculate_crc(id_buf, 0, |
|
size - MXT_INFO_CHECKSUM_SIZE); |
|
|
|
/* |
|
* CRC mismatch can be caused by data corruption due to I2C comms |
|
* issue or else device is not using Object Based Protocol (eg i2c-hid) |
|
*/ |
|
if ((data->info_crc == 0) || (data->info_crc != calculated_crc)) { |
|
dev_err(&client->dev, |
|
"Info Block CRC error calculated=0x%06X read=0x%06X\n", |
|
calculated_crc, data->info_crc); |
|
error = -EIO; |
|
goto err_free_mem; |
|
} |
|
|
|
data->raw_info_block = id_buf; |
|
data->info = (struct mxt_info *)id_buf; |
|
|
|
dev_info(&client->dev, |
|
"Family: %u Variant: %u Firmware V%u.%u.%02X Objects: %u\n", |
|
data->info->family_id, data->info->variant_id, |
|
data->info->version >> 4, data->info->version & 0xf, |
|
data->info->build, data->info->object_num); |
|
|
|
/* Parse object table information */ |
|
error = mxt_parse_object_table(data, id_buf + MXT_OBJECT_START); |
|
if (error) { |
|
dev_err(&client->dev, "Error %d parsing object table\n", error); |
|
mxt_free_object_table(data); |
|
goto err_free_mem; |
|
} |
|
|
|
data->object_table = (struct mxt_object *)(id_buf + MXT_OBJECT_START); |
|
|
|
return 0; |
|
|
|
err_free_mem: |
|
kfree(id_buf); |
|
return error; |
|
} |
|
|
|
static int mxt_read_t9_resolution(struct mxt_data *data) |
|
{ |
|
struct i2c_client *client = data->client; |
|
int error; |
|
struct t9_range range; |
|
unsigned char orient; |
|
struct mxt_object *object; |
|
|
|
object = mxt_get_object(data, MXT_TOUCH_MULTI_T9); |
|
if (!object) |
|
return -EINVAL; |
|
|
|
error = __mxt_read_reg(client, |
|
object->start_address + MXT_T9_XSIZE, |
|
sizeof(data->xsize), &data->xsize); |
|
if (error) |
|
return error; |
|
|
|
error = __mxt_read_reg(client, |
|
object->start_address + MXT_T9_YSIZE, |
|
sizeof(data->ysize), &data->ysize); |
|
if (error) |
|
return error; |
|
|
|
error = __mxt_read_reg(client, |
|
object->start_address + MXT_T9_RANGE, |
|
sizeof(range), &range); |
|
if (error) |
|
return error; |
|
|
|
data->max_x = get_unaligned_le16(&range.x); |
|
data->max_y = get_unaligned_le16(&range.y); |
|
|
|
error = __mxt_read_reg(client, |
|
object->start_address + MXT_T9_ORIENT, |
|
1, &orient); |
|
if (error) |
|
return error; |
|
|
|
data->xy_switch = orient & MXT_T9_ORIENT_SWITCH; |
|
data->invertx = orient & MXT_T9_ORIENT_INVERTX; |
|
data->inverty = orient & MXT_T9_ORIENT_INVERTY; |
|
|
|
return 0; |
|
} |
|
|
|
static int mxt_read_t100_config(struct mxt_data *data) |
|
{ |
|
struct i2c_client *client = data->client; |
|
int error; |
|
struct mxt_object *object; |
|
u16 range_x, range_y; |
|
u8 cfg, tchaux; |
|
u8 aux; |
|
|
|
object = mxt_get_object(data, MXT_TOUCH_MULTITOUCHSCREEN_T100); |
|
if (!object) |
|
return -EINVAL; |
|
|
|
/* read touchscreen dimensions */ |
|
error = __mxt_read_reg(client, |
|
object->start_address + MXT_T100_XRANGE, |
|
sizeof(range_x), &range_x); |
|
if (error) |
|
return error; |
|
|
|
data->max_x = get_unaligned_le16(&range_x); |
|
|
|
error = __mxt_read_reg(client, |
|
object->start_address + MXT_T100_YRANGE, |
|
sizeof(range_y), &range_y); |
|
if (error) |
|
return error; |
|
|
|
data->max_y = get_unaligned_le16(&range_y); |
|
|
|
error = __mxt_read_reg(client, |
|
object->start_address + MXT_T100_XSIZE, |
|
sizeof(data->xsize), &data->xsize); |
|
if (error) |
|
return error; |
|
|
|
error = __mxt_read_reg(client, |
|
object->start_address + MXT_T100_YSIZE, |
|
sizeof(data->ysize), &data->ysize); |
|
if (error) |
|
return error; |
|
|
|
/* read orientation config */ |
|
error = __mxt_read_reg(client, |
|
object->start_address + MXT_T100_CFG1, |
|
1, &cfg); |
|
if (error) |
|
return error; |
|
|
|
data->xy_switch = cfg & MXT_T100_CFG_SWITCHXY; |
|
data->invertx = cfg & MXT_T100_CFG_INVERTX; |
|
data->inverty = cfg & MXT_T100_CFG_INVERTY; |
|
|
|
/* allocate aux bytes */ |
|
error = __mxt_read_reg(client, |
|
object->start_address + MXT_T100_TCHAUX, |
|
1, &tchaux); |
|
if (error) |
|
return error; |
|
|
|
aux = 6; |
|
|
|
if (tchaux & MXT_T100_TCHAUX_VECT) |
|
data->t100_aux_vect = aux++; |
|
|
|
if (tchaux & MXT_T100_TCHAUX_AMPL) |
|
data->t100_aux_ampl = aux++; |
|
|
|
if (tchaux & MXT_T100_TCHAUX_AREA) |
|
data->t100_aux_area = aux++; |
|
|
|
dev_dbg(&client->dev, |
|
"T100 aux mappings vect:%u ampl:%u area:%u\n", |
|
data->t100_aux_vect, data->t100_aux_ampl, data->t100_aux_area); |
|
|
|
return 0; |
|
} |
|
|
|
static int mxt_input_open(struct input_dev *dev); |
|
static void mxt_input_close(struct input_dev *dev); |
|
|
|
static void mxt_set_up_as_touchpad(struct input_dev *input_dev, |
|
struct mxt_data *data) |
|
{ |
|
int i; |
|
|
|
input_dev->name = "Atmel maXTouch Touchpad"; |
|
|
|
__set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit); |
|
|
|
input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM); |
|
input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM); |
|
input_abs_set_res(input_dev, ABS_MT_POSITION_X, |
|
MXT_PIXELS_PER_MM); |
|
input_abs_set_res(input_dev, ABS_MT_POSITION_Y, |
|
MXT_PIXELS_PER_MM); |
|
|
|
for (i = 0; i < data->t19_num_keys; i++) |
|
if (data->t19_keymap[i] != KEY_RESERVED) |
|
input_set_capability(input_dev, EV_KEY, |
|
data->t19_keymap[i]); |
|
} |
|
|
|
static int mxt_initialize_input_device(struct mxt_data *data) |
|
{ |
|
struct device *dev = &data->client->dev; |
|
struct input_dev *input_dev; |
|
int error; |
|
unsigned int num_mt_slots; |
|
unsigned int mt_flags = 0; |
|
|
|
switch (data->multitouch) { |
|
case MXT_TOUCH_MULTI_T9: |
|
num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1; |
|
error = mxt_read_t9_resolution(data); |
|
if (error) |
|
dev_warn(dev, "Failed to initialize T9 resolution\n"); |
|
break; |
|
|
|
case MXT_TOUCH_MULTITOUCHSCREEN_T100: |
|
num_mt_slots = data->num_touchids; |
|
error = mxt_read_t100_config(data); |
|
if (error) |
|
dev_warn(dev, "Failed to read T100 config\n"); |
|
break; |
|
|
|
default: |
|
dev_err(dev, "Invalid multitouch object\n"); |
|
return -EINVAL; |
|
} |
|
|
|
/* Handle default values and orientation switch */ |
|
if (data->max_x == 0) |
|
data->max_x = 1023; |
|
|
|
if (data->max_y == 0) |
|
data->max_y = 1023; |
|
|
|
if (data->xy_switch) |
|
swap(data->max_x, data->max_y); |
|
|
|
dev_info(dev, "Touchscreen size X%uY%u\n", data->max_x, data->max_y); |
|
|
|
/* Register input device */ |
|
input_dev = input_allocate_device(); |
|
if (!input_dev) |
|
return -ENOMEM; |
|
|
|
input_dev->name = "Atmel maXTouch Touchscreen"; |
|
input_dev->phys = data->phys; |
|
input_dev->id.bustype = BUS_I2C; |
|
input_dev->dev.parent = dev; |
|
input_dev->open = mxt_input_open; |
|
input_dev->close = mxt_input_close; |
|
|
|
input_set_capability(input_dev, EV_KEY, BTN_TOUCH); |
|
|
|
/* For single touch */ |
|
input_set_abs_params(input_dev, ABS_X, 0, data->max_x, 0, 0); |
|
input_set_abs_params(input_dev, ABS_Y, 0, data->max_y, 0, 0); |
|
|
|
if (data->multitouch == MXT_TOUCH_MULTI_T9 || |
|
(data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 && |
|
data->t100_aux_ampl)) { |
|
input_set_abs_params(input_dev, ABS_PRESSURE, 0, 255, 0, 0); |
|
} |
|
|
|
/* If device has buttons we assume it is a touchpad */ |
|
if (data->t19_num_keys) { |
|
mxt_set_up_as_touchpad(input_dev, data); |
|
mt_flags |= INPUT_MT_POINTER; |
|
} else { |
|
mt_flags |= INPUT_MT_DIRECT; |
|
} |
|
|
|
/* For multi touch */ |
|
error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags); |
|
if (error) { |
|
dev_err(dev, "Error %d initialising slots\n", error); |
|
goto err_free_mem; |
|
} |
|
|
|
if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100) { |
|
input_set_abs_params(input_dev, ABS_MT_TOOL_TYPE, |
|
0, MT_TOOL_MAX, 0, 0); |
|
input_set_abs_params(input_dev, ABS_MT_DISTANCE, |
|
MXT_DISTANCE_ACTIVE_TOUCH, |
|
MXT_DISTANCE_HOVERING, |
|
0, 0); |
|
} |
|
|
|
input_set_abs_params(input_dev, ABS_MT_POSITION_X, |
|
0, data->max_x, 0, 0); |
|
input_set_abs_params(input_dev, ABS_MT_POSITION_Y, |
|
0, data->max_y, 0, 0); |
|
|
|
if (data->multitouch == MXT_TOUCH_MULTI_T9 || |
|
(data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 && |
|
data->t100_aux_area)) { |
|
input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, |
|
0, MXT_MAX_AREA, 0, 0); |
|
} |
|
|
|
if (data->multitouch == MXT_TOUCH_MULTI_T9 || |
|
(data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 && |
|
data->t100_aux_ampl)) { |
|
input_set_abs_params(input_dev, ABS_MT_PRESSURE, |
|
0, 255, 0, 0); |
|
} |
|
|
|
if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 && |
|
data->t100_aux_vect) { |
|
input_set_abs_params(input_dev, ABS_MT_ORIENTATION, |
|
0, 255, 0, 0); |
|
} |
|
|
|
if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 && |
|
data->t100_aux_vect) { |
|
input_set_abs_params(input_dev, ABS_MT_ORIENTATION, |
|
0, 255, 0, 0); |
|
} |
|
|
|
input_set_drvdata(input_dev, data); |
|
|
|
error = input_register_device(input_dev); |
|
if (error) { |
|
dev_err(dev, "Error %d registering input device\n", error); |
|
goto err_free_mem; |
|
} |
|
|
|
data->input_dev = input_dev; |
|
|
|
return 0; |
|
|
|
err_free_mem: |
|
input_free_device(input_dev); |
|
return error; |
|
} |
|
|
|
static int mxt_configure_objects(struct mxt_data *data, |
|
const struct firmware *cfg); |
|
|
|
static void mxt_config_cb(const struct firmware *cfg, void *ctx) |
|
{ |
|
mxt_configure_objects(ctx, cfg); |
|
release_firmware(cfg); |
|
} |
|
|
|
static int mxt_initialize(struct mxt_data *data) |
|
{ |
|
struct i2c_client *client = data->client; |
|
int recovery_attempts = 0; |
|
int error; |
|
|
|
while (1) { |
|
error = mxt_read_info_block(data); |
|
if (!error) |
|
break; |
|
|
|
/* Check bootloader state */ |
|
error = mxt_probe_bootloader(data, false); |
|
if (error) { |
|
dev_info(&client->dev, "Trying alternate bootloader address\n"); |
|
error = mxt_probe_bootloader(data, true); |
|
if (error) { |
|
/* Chip is not in appmode or bootloader mode */ |
|
return error; |
|
} |
|
} |
|
|
|
/* OK, we are in bootloader, see if we can recover */ |
|
if (++recovery_attempts > 1) { |
|
dev_err(&client->dev, "Could not recover from bootloader mode\n"); |
|
/* |
|
* We can reflash from this state, so do not |
|
* abort initialization. |
|
*/ |
|
data->in_bootloader = true; |
|
return 0; |
|
} |
|
|
|
/* Attempt to exit bootloader into app mode */ |
|
mxt_send_bootloader_cmd(data, false); |
|
msleep(MXT_FW_RESET_TIME); |
|
} |
|
|
|
error = mxt_check_retrigen(data); |
|
if (error) |
|
return error; |
|
|
|
error = mxt_acquire_irq(data); |
|
if (error) |
|
return error; |
|
|
|
error = request_firmware_nowait(THIS_MODULE, true, MXT_CFG_NAME, |
|
&client->dev, GFP_KERNEL, data, |
|
mxt_config_cb); |
|
if (error) { |
|
dev_err(&client->dev, "Failed to invoke firmware loader: %d\n", |
|
error); |
|
return error; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int mxt_set_t7_power_cfg(struct mxt_data *data, u8 sleep) |
|
{ |
|
struct device *dev = &data->client->dev; |
|
int error; |
|
struct t7_config *new_config; |
|
struct t7_config deepsleep = { .active = 0, .idle = 0 }; |
|
|
|
if (sleep == MXT_POWER_CFG_DEEPSLEEP) |
|
new_config = &deepsleep; |
|
else |
|
new_config = &data->t7_cfg; |
|
|
|
error = __mxt_write_reg(data->client, data->T7_address, |
|
sizeof(data->t7_cfg), new_config); |
|
if (error) |
|
return error; |
|
|
|
dev_dbg(dev, "Set T7 ACTV:%d IDLE:%d\n", |
|
new_config->active, new_config->idle); |
|
|
|
return 0; |
|
} |
|
|
|
static int mxt_init_t7_power_cfg(struct mxt_data *data) |
|
{ |
|
struct device *dev = &data->client->dev; |
|
int error; |
|
bool retry = false; |
|
|
|
recheck: |
|
error = __mxt_read_reg(data->client, data->T7_address, |
|
sizeof(data->t7_cfg), &data->t7_cfg); |
|
if (error) |
|
return error; |
|
|
|
if (data->t7_cfg.active == 0 || data->t7_cfg.idle == 0) { |
|
if (!retry) { |
|
dev_dbg(dev, "T7 cfg zero, resetting\n"); |
|
mxt_soft_reset(data); |
|
retry = true; |
|
goto recheck; |
|
} else { |
|
dev_dbg(dev, "T7 cfg zero after reset, overriding\n"); |
|
data->t7_cfg.active = 20; |
|
data->t7_cfg.idle = 100; |
|
return mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN); |
|
} |
|
} |
|
|
|
dev_dbg(dev, "Initialized power cfg: ACTV %d, IDLE %d\n", |
|
data->t7_cfg.active, data->t7_cfg.idle); |
|
return 0; |
|
} |
|
|
|
#ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37 |
|
static const struct v4l2_file_operations mxt_video_fops = { |
|
.owner = THIS_MODULE, |
|
.open = v4l2_fh_open, |
|
.release = vb2_fop_release, |
|
.unlocked_ioctl = video_ioctl2, |
|
.read = vb2_fop_read, |
|
.mmap = vb2_fop_mmap, |
|
.poll = vb2_fop_poll, |
|
}; |
|
|
|
static u16 mxt_get_debug_value(struct mxt_data *data, unsigned int x, |
|
unsigned int y) |
|
{ |
|
struct mxt_info *info = data->info; |
|
struct mxt_dbg *dbg = &data->dbg; |
|
unsigned int ofs, page; |
|
unsigned int col = 0; |
|
unsigned int col_width; |
|
|
|
if (info->family_id == MXT_FAMILY_1386) { |
|
col_width = info->matrix_ysize / MXT1386_COLUMNS; |
|
col = y / col_width; |
|
y = y % col_width; |
|
} else { |
|
col_width = info->matrix_ysize; |
|
} |
|
|
|
ofs = (y + (x * col_width)) * sizeof(u16); |
|
page = ofs / MXT_DIAGNOSTIC_SIZE; |
|
ofs %= MXT_DIAGNOSTIC_SIZE; |
|
|
|
if (info->family_id == MXT_FAMILY_1386) |
|
page += col * MXT1386_PAGES_PER_COLUMN; |
|
|
|
return get_unaligned_le16(&dbg->t37_buf[page].data[ofs]); |
|
} |
|
|
|
static int mxt_convert_debug_pages(struct mxt_data *data, u16 *outbuf) |
|
{ |
|
struct mxt_dbg *dbg = &data->dbg; |
|
unsigned int x = 0; |
|
unsigned int y = 0; |
|
unsigned int i, rx, ry; |
|
|
|
for (i = 0; i < dbg->t37_nodes; i++) { |
|
/* Handle orientation */ |
|
rx = data->xy_switch ? y : x; |
|
ry = data->xy_switch ? x : y; |
|
rx = data->invertx ? (data->xsize - 1 - rx) : rx; |
|
ry = data->inverty ? (data->ysize - 1 - ry) : ry; |
|
|
|
outbuf[i] = mxt_get_debug_value(data, rx, ry); |
|
|
|
/* Next value */ |
|
if (++x >= (data->xy_switch ? data->ysize : data->xsize)) { |
|
x = 0; |
|
y++; |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int mxt_read_diagnostic_debug(struct mxt_data *data, u8 mode, |
|
u16 *outbuf) |
|
{ |
|
struct mxt_dbg *dbg = &data->dbg; |
|
int retries = 0; |
|
int page; |
|
int ret; |
|
u8 cmd = mode; |
|
struct t37_debug *p; |
|
u8 cmd_poll; |
|
|
|
for (page = 0; page < dbg->t37_pages; page++) { |
|
p = dbg->t37_buf + page; |
|
|
|
ret = mxt_write_reg(data->client, dbg->diag_cmd_address, |
|
cmd); |
|
if (ret) |
|
return ret; |
|
|
|
retries = 0; |
|
msleep(20); |
|
wait_cmd: |
|
/* Read back command byte */ |
|
ret = __mxt_read_reg(data->client, dbg->diag_cmd_address, |
|
sizeof(cmd_poll), &cmd_poll); |
|
if (ret) |
|
return ret; |
|
|
|
/* Field is cleared once the command has been processed */ |
|
if (cmd_poll) { |
|
if (retries++ > 100) |
|
return -EINVAL; |
|
|
|
msleep(20); |
|
goto wait_cmd; |
|
} |
|
|
|
/* Read T37 page */ |
|
ret = __mxt_read_reg(data->client, dbg->t37_address, |
|
sizeof(struct t37_debug), p); |
|
if (ret) |
|
return ret; |
|
|
|
if (p->mode != mode || p->page != page) { |
|
dev_err(&data->client->dev, "T37 page mismatch\n"); |
|
return -EINVAL; |
|
} |
|
|
|
dev_dbg(&data->client->dev, "%s page:%d retries:%d\n", |
|
__func__, page, retries); |
|
|
|
/* For remaining pages, write PAGEUP rather than mode */ |
|
cmd = MXT_DIAGNOSTIC_PAGEUP; |
|
} |
|
|
|
return mxt_convert_debug_pages(data, outbuf); |
|
} |
|
|
|
static int mxt_queue_setup(struct vb2_queue *q, |
|
unsigned int *nbuffers, unsigned int *nplanes, |
|
unsigned int sizes[], struct device *alloc_devs[]) |
|
{ |
|
struct mxt_data *data = q->drv_priv; |
|
size_t size = data->dbg.t37_nodes * sizeof(u16); |
|
|
|
if (*nplanes) |
|
return sizes[0] < size ? -EINVAL : 0; |
|
|
|
*nplanes = 1; |
|
sizes[0] = size; |
|
|
|
return 0; |
|
} |
|
|
|
static void mxt_buffer_queue(struct vb2_buffer *vb) |
|
{ |
|
struct mxt_data *data = vb2_get_drv_priv(vb->vb2_queue); |
|
u16 *ptr; |
|
int ret; |
|
u8 mode; |
|
|
|
ptr = vb2_plane_vaddr(vb, 0); |
|
if (!ptr) { |
|
dev_err(&data->client->dev, "Error acquiring frame ptr\n"); |
|
goto fault; |
|
} |
|
|
|
switch (data->dbg.input) { |
|
case MXT_V4L_INPUT_DELTAS: |
|
default: |
|
mode = MXT_DIAGNOSTIC_DELTAS; |
|
break; |
|
|
|
case MXT_V4L_INPUT_REFS: |
|
mode = MXT_DIAGNOSTIC_REFS; |
|
break; |
|
} |
|
|
|
ret = mxt_read_diagnostic_debug(data, mode, ptr); |
|
if (ret) |
|
goto fault; |
|
|
|
vb2_set_plane_payload(vb, 0, data->dbg.t37_nodes * sizeof(u16)); |
|
vb2_buffer_done(vb, VB2_BUF_STATE_DONE); |
|
return; |
|
|
|
fault: |
|
vb2_buffer_done(vb, VB2_BUF_STATE_ERROR); |
|
} |
|
|
|
/* V4L2 structures */ |
|
static const struct vb2_ops mxt_queue_ops = { |
|
.queue_setup = mxt_queue_setup, |
|
.buf_queue = mxt_buffer_queue, |
|
.wait_prepare = vb2_ops_wait_prepare, |
|
.wait_finish = vb2_ops_wait_finish, |
|
}; |
|
|
|
static const struct vb2_queue mxt_queue = { |
|
.type = V4L2_BUF_TYPE_VIDEO_CAPTURE, |
|
.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ, |
|
.buf_struct_size = sizeof(struct mxt_vb2_buffer), |
|
.ops = &mxt_queue_ops, |
|
.mem_ops = &vb2_vmalloc_memops, |
|
.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC, |
|
.min_buffers_needed = 1, |
|
}; |
|
|
|
static int mxt_vidioc_querycap(struct file *file, void *priv, |
|
struct v4l2_capability *cap) |
|
{ |
|
struct mxt_data *data = video_drvdata(file); |
|
|
|
strlcpy(cap->driver, "atmel_mxt_ts", sizeof(cap->driver)); |
|
strlcpy(cap->card, "atmel_mxt_ts touch", sizeof(cap->card)); |
|
snprintf(cap->bus_info, sizeof(cap->bus_info), |
|
"I2C:%s", dev_name(&data->client->dev)); |
|
return 0; |
|
} |
|
|
|
static int mxt_vidioc_enum_input(struct file *file, void *priv, |
|
struct v4l2_input *i) |
|
{ |
|
if (i->index >= MXT_V4L_INPUT_MAX) |
|
return -EINVAL; |
|
|
|
i->type = V4L2_INPUT_TYPE_TOUCH; |
|
|
|
switch (i->index) { |
|
case MXT_V4L_INPUT_REFS: |
|
strlcpy(i->name, "Mutual Capacitance References", |
|
sizeof(i->name)); |
|
break; |
|
case MXT_V4L_INPUT_DELTAS: |
|
strlcpy(i->name, "Mutual Capacitance Deltas", sizeof(i->name)); |
|
break; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int mxt_set_input(struct mxt_data *data, unsigned int i) |
|
{ |
|
struct v4l2_pix_format *f = &data->dbg.format; |
|
|
|
if (i >= MXT_V4L_INPUT_MAX) |
|
return -EINVAL; |
|
|
|
if (i == MXT_V4L_INPUT_DELTAS) |
|
f->pixelformat = V4L2_TCH_FMT_DELTA_TD16; |
|
else |
|
f->pixelformat = V4L2_TCH_FMT_TU16; |
|
|
|
f->width = data->xy_switch ? data->ysize : data->xsize; |
|
f->height = data->xy_switch ? data->xsize : data->ysize; |
|
f->field = V4L2_FIELD_NONE; |
|
f->colorspace = V4L2_COLORSPACE_RAW; |
|
f->bytesperline = f->width * sizeof(u16); |
|
f->sizeimage = f->width * f->height * sizeof(u16); |
|
|
|
data->dbg.input = i; |
|
|
|
return 0; |
|
} |
|
|
|
static int mxt_vidioc_s_input(struct file *file, void *priv, unsigned int i) |
|
{ |
|
return mxt_set_input(video_drvdata(file), i); |
|
} |
|
|
|
static int mxt_vidioc_g_input(struct file *file, void *priv, unsigned int *i) |
|
{ |
|
struct mxt_data *data = video_drvdata(file); |
|
|
|
*i = data->dbg.input; |
|
|
|
return 0; |
|
} |
|
|
|
static int mxt_vidioc_fmt(struct file *file, void *priv, struct v4l2_format *f) |
|
{ |
|
struct mxt_data *data = video_drvdata(file); |
|
|
|
f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
|
f->fmt.pix = data->dbg.format; |
|
|
|
return 0; |
|
} |
|
|
|
static int mxt_vidioc_enum_fmt(struct file *file, void *priv, |
|
struct v4l2_fmtdesc *fmt) |
|
{ |
|
if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
|
return -EINVAL; |
|
|
|
switch (fmt->index) { |
|
case 0: |
|
fmt->pixelformat = V4L2_TCH_FMT_TU16; |
|
break; |
|
|
|
case 1: |
|
fmt->pixelformat = V4L2_TCH_FMT_DELTA_TD16; |
|
break; |
|
|
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int mxt_vidioc_g_parm(struct file *file, void *fh, |
|
struct v4l2_streamparm *a) |
|
{ |
|
if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
|
return -EINVAL; |
|
|
|
a->parm.capture.readbuffers = 1; |
|
a->parm.capture.timeperframe.numerator = 1; |
|
a->parm.capture.timeperframe.denominator = 10; |
|
return 0; |
|
} |
|
|
|
static const struct v4l2_ioctl_ops mxt_video_ioctl_ops = { |
|
.vidioc_querycap = mxt_vidioc_querycap, |
|
|
|
.vidioc_enum_fmt_vid_cap = mxt_vidioc_enum_fmt, |
|
.vidioc_s_fmt_vid_cap = mxt_vidioc_fmt, |
|
.vidioc_g_fmt_vid_cap = mxt_vidioc_fmt, |
|
.vidioc_try_fmt_vid_cap = mxt_vidioc_fmt, |
|
.vidioc_g_parm = mxt_vidioc_g_parm, |
|
|
|
.vidioc_enum_input = mxt_vidioc_enum_input, |
|
.vidioc_g_input = mxt_vidioc_g_input, |
|
.vidioc_s_input = mxt_vidioc_s_input, |
|
|
|
.vidioc_reqbufs = vb2_ioctl_reqbufs, |
|
.vidioc_create_bufs = vb2_ioctl_create_bufs, |
|
.vidioc_querybuf = vb2_ioctl_querybuf, |
|
.vidioc_qbuf = vb2_ioctl_qbuf, |
|
.vidioc_dqbuf = vb2_ioctl_dqbuf, |
|
.vidioc_expbuf = vb2_ioctl_expbuf, |
|
|
|
.vidioc_streamon = vb2_ioctl_streamon, |
|
.vidioc_streamoff = vb2_ioctl_streamoff, |
|
}; |
|
|
|
static const struct video_device mxt_video_device = { |
|
.name = "Atmel maxTouch", |
|
.fops = &mxt_video_fops, |
|
.ioctl_ops = &mxt_video_ioctl_ops, |
|
.release = video_device_release_empty, |
|
.device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_TOUCH | |
|
V4L2_CAP_READWRITE | V4L2_CAP_STREAMING, |
|
}; |
|
|
|
static void mxt_debug_init(struct mxt_data *data) |
|
{ |
|
struct mxt_info *info = data->info; |
|
struct mxt_dbg *dbg = &data->dbg; |
|
struct mxt_object *object; |
|
int error; |
|
|
|
object = mxt_get_object(data, MXT_GEN_COMMAND_T6); |
|
if (!object) |
|
goto error; |
|
|
|
dbg->diag_cmd_address = object->start_address + MXT_COMMAND_DIAGNOSTIC; |
|
|
|
object = mxt_get_object(data, MXT_DEBUG_DIAGNOSTIC_T37); |
|
if (!object) |
|
goto error; |
|
|
|
if (mxt_obj_size(object) != sizeof(struct t37_debug)) { |
|
dev_warn(&data->client->dev, "Bad T37 size"); |
|
goto error; |
|
} |
|
|
|
dbg->t37_address = object->start_address; |
|
|
|
/* Calculate size of data and allocate buffer */ |
|
dbg->t37_nodes = data->xsize * data->ysize; |
|
|
|
if (info->family_id == MXT_FAMILY_1386) |
|
dbg->t37_pages = MXT1386_COLUMNS * MXT1386_PAGES_PER_COLUMN; |
|
else |
|
dbg->t37_pages = DIV_ROUND_UP(data->xsize * |
|
info->matrix_ysize * |
|
sizeof(u16), |
|
sizeof(dbg->t37_buf->data)); |
|
|
|
dbg->t37_buf = devm_kmalloc_array(&data->client->dev, dbg->t37_pages, |
|
sizeof(struct t37_debug), GFP_KERNEL); |
|
if (!dbg->t37_buf) |
|
goto error; |
|
|
|
/* init channel to zero */ |
|
mxt_set_input(data, 0); |
|
|
|
/* register video device */ |
|
snprintf(dbg->v4l2.name, sizeof(dbg->v4l2.name), "%s", "atmel_mxt_ts"); |
|
error = v4l2_device_register(&data->client->dev, &dbg->v4l2); |
|
if (error) |
|
goto error; |
|
|
|
/* initialize the queue */ |
|
mutex_init(&dbg->lock); |
|
dbg->queue = mxt_queue; |
|
dbg->queue.drv_priv = data; |
|
dbg->queue.lock = &dbg->lock; |
|
dbg->queue.dev = &data->client->dev; |
|
|
|
error = vb2_queue_init(&dbg->queue); |
|
if (error) |
|
goto error_unreg_v4l2; |
|
|
|
dbg->vdev = mxt_video_device; |
|
dbg->vdev.v4l2_dev = &dbg->v4l2; |
|
dbg->vdev.lock = &dbg->lock; |
|
dbg->vdev.vfl_dir = VFL_DIR_RX; |
|
dbg->vdev.queue = &dbg->queue; |
|
video_set_drvdata(&dbg->vdev, data); |
|
|
|
error = video_register_device(&dbg->vdev, VFL_TYPE_TOUCH, -1); |
|
if (error) |
|
goto error_unreg_v4l2; |
|
|
|
return; |
|
|
|
error_unreg_v4l2: |
|
v4l2_device_unregister(&dbg->v4l2); |
|
error: |
|
dev_warn(&data->client->dev, "Error initializing T37\n"); |
|
} |
|
#else |
|
static void mxt_debug_init(struct mxt_data *data) |
|
{ |
|
} |
|
#endif |
|
|
|
static int mxt_configure_objects(struct mxt_data *data, |
|
const struct firmware *cfg) |
|
{ |
|
struct device *dev = &data->client->dev; |
|
int error; |
|
|
|
error = mxt_init_t7_power_cfg(data); |
|
if (error) { |
|
dev_err(dev, "Failed to initialize power cfg\n"); |
|
return error; |
|
} |
|
|
|
if (cfg) { |
|
error = mxt_update_cfg(data, cfg); |
|
if (error) |
|
dev_warn(dev, "Error %d updating config\n", error); |
|
} |
|
|
|
if (data->multitouch) { |
|
error = mxt_initialize_input_device(data); |
|
if (error) |
|
return error; |
|
} else { |
|
dev_warn(dev, "No touch object detected\n"); |
|
} |
|
|
|
mxt_debug_init(data); |
|
|
|
return 0; |
|
} |
|
|
|
/* Firmware Version is returned as Major.Minor.Build */ |
|
static ssize_t mxt_fw_version_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct mxt_data *data = dev_get_drvdata(dev); |
|
struct mxt_info *info = data->info; |
|
return scnprintf(buf, PAGE_SIZE, "%u.%u.%02X\n", |
|
info->version >> 4, info->version & 0xf, info->build); |
|
} |
|
|
|
/* Hardware Version is returned as FamilyID.VariantID */ |
|
static ssize_t mxt_hw_version_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct mxt_data *data = dev_get_drvdata(dev); |
|
struct mxt_info *info = data->info; |
|
return scnprintf(buf, PAGE_SIZE, "%u.%u\n", |
|
info->family_id, info->variant_id); |
|
} |
|
|
|
static ssize_t mxt_show_instance(char *buf, int count, |
|
struct mxt_object *object, int instance, |
|
const u8 *val) |
|
{ |
|
int i; |
|
|
|
if (mxt_obj_instances(object) > 1) |
|
count += scnprintf(buf + count, PAGE_SIZE - count, |
|
"Instance %u\n", instance); |
|
|
|
for (i = 0; i < mxt_obj_size(object); i++) |
|
count += scnprintf(buf + count, PAGE_SIZE - count, |
|
"\t[%2u]: %02x (%d)\n", i, val[i], val[i]); |
|
count += scnprintf(buf + count, PAGE_SIZE - count, "\n"); |
|
|
|
return count; |
|
} |
|
|
|
static ssize_t mxt_object_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct mxt_data *data = dev_get_drvdata(dev); |
|
struct mxt_object *object; |
|
int count = 0; |
|
int i, j; |
|
int error; |
|
u8 *obuf; |
|
|
|
/* Pre-allocate buffer large enough to hold max sized object. */ |
|
obuf = kmalloc(256, GFP_KERNEL); |
|
if (!obuf) |
|
return -ENOMEM; |
|
|
|
error = 0; |
|
for (i = 0; i < data->info->object_num; i++) { |
|
object = data->object_table + i; |
|
|
|
if (!mxt_object_readable(object->type)) |
|
continue; |
|
|
|
count += scnprintf(buf + count, PAGE_SIZE - count, |
|
"T%u:\n", object->type); |
|
|
|
for (j = 0; j < mxt_obj_instances(object); j++) { |
|
u16 size = mxt_obj_size(object); |
|
u16 addr = object->start_address + j * size; |
|
|
|
error = __mxt_read_reg(data->client, addr, size, obuf); |
|
if (error) |
|
goto done; |
|
|
|
count = mxt_show_instance(buf, count, object, j, obuf); |
|
} |
|
} |
|
|
|
done: |
|
kfree(obuf); |
|
return error ?: count; |
|
} |
|
|
|
static int mxt_check_firmware_format(struct device *dev, |
|
const struct firmware *fw) |
|
{ |
|
unsigned int pos = 0; |
|
char c; |
|
|
|
while (pos < fw->size) { |
|
c = *(fw->data + pos); |
|
|
|
if (c < '0' || (c > '9' && c < 'A') || c > 'F') |
|
return 0; |
|
|
|
pos++; |
|
} |
|
|
|
/* |
|
* To convert file try: |
|
* xxd -r -p mXTXXX__APP_VX-X-XX.enc > maxtouch.fw |
|
*/ |
|
dev_err(dev, "Aborting: firmware file must be in binary format\n"); |
|
|
|
return -EINVAL; |
|
} |
|
|
|
static int mxt_load_fw(struct device *dev, const char *fn) |
|
{ |
|
struct mxt_data *data = dev_get_drvdata(dev); |
|
const struct firmware *fw = NULL; |
|
unsigned int frame_size; |
|
unsigned int pos = 0; |
|
unsigned int retry = 0; |
|
unsigned int frame = 0; |
|
int ret; |
|
|
|
ret = request_firmware(&fw, fn, dev); |
|
if (ret) { |
|
dev_err(dev, "Unable to open firmware %s\n", fn); |
|
return ret; |
|
} |
|
|
|
/* Check for incorrect enc file */ |
|
ret = mxt_check_firmware_format(dev, fw); |
|
if (ret) |
|
goto release_firmware; |
|
|
|
if (!data->in_bootloader) { |
|
/* Change to the bootloader mode */ |
|
data->in_bootloader = true; |
|
|
|
ret = mxt_t6_command(data, MXT_COMMAND_RESET, |
|
MXT_BOOT_VALUE, false); |
|
if (ret) |
|
goto release_firmware; |
|
|
|
msleep(MXT_RESET_TIME); |
|
|
|
/* Do not need to scan since we know family ID */ |
|
ret = mxt_lookup_bootloader_address(data, 0); |
|
if (ret) |
|
goto release_firmware; |
|
|
|
mxt_free_input_device(data); |
|
mxt_free_object_table(data); |
|
} else { |
|
enable_irq(data->irq); |
|
} |
|
|
|
reinit_completion(&data->bl_completion); |
|
|
|
ret = mxt_check_bootloader(data, MXT_WAITING_BOOTLOAD_CMD, false); |
|
if (ret) { |
|
/* Bootloader may still be unlocked from previous attempt */ |
|
ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, false); |
|
if (ret) |
|
goto disable_irq; |
|
} else { |
|
dev_info(dev, "Unlocking bootloader\n"); |
|
|
|
/* Unlock bootloader */ |
|
ret = mxt_send_bootloader_cmd(data, true); |
|
if (ret) |
|
goto disable_irq; |
|
} |
|
|
|
while (pos < fw->size) { |
|
ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, true); |
|
if (ret) |
|
goto disable_irq; |
|
|
|
frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1)); |
|
|
|
/* Take account of CRC bytes */ |
|
frame_size += 2; |
|
|
|
/* Write one frame to device */ |
|
ret = mxt_bootloader_write(data, fw->data + pos, frame_size); |
|
if (ret) |
|
goto disable_irq; |
|
|
|
ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS, true); |
|
if (ret) { |
|
retry++; |
|
|
|
/* Back off by 20ms per retry */ |
|
msleep(retry * 20); |
|
|
|
if (retry > 20) { |
|
dev_err(dev, "Retry count exceeded\n"); |
|
goto disable_irq; |
|
} |
|
} else { |
|
retry = 0; |
|
pos += frame_size; |
|
frame++; |
|
} |
|
|
|
if (frame % 50 == 0) |
|
dev_dbg(dev, "Sent %d frames, %d/%zd bytes\n", |
|
frame, pos, fw->size); |
|
} |
|
|
|
/* Wait for flash. */ |
|
ret = mxt_wait_for_completion(data, &data->bl_completion, |
|
MXT_FW_RESET_TIME); |
|
if (ret) |
|
goto disable_irq; |
|
|
|
dev_dbg(dev, "Sent %d frames, %d bytes\n", frame, pos); |
|
|
|
/* |
|
* Wait for device to reset. Some bootloader versions do not assert |
|
* the CHG line after bootloading has finished, so ignore potential |
|
* errors. |
|
*/ |
|
mxt_wait_for_completion(data, &data->bl_completion, MXT_FW_RESET_TIME); |
|
|
|
data->in_bootloader = false; |
|
|
|
disable_irq: |
|
disable_irq(data->irq); |
|
release_firmware: |
|
release_firmware(fw); |
|
return ret; |
|
} |
|
|
|
static ssize_t mxt_update_fw_store(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct mxt_data *data = dev_get_drvdata(dev); |
|
int error; |
|
|
|
error = mxt_load_fw(dev, MXT_FW_NAME); |
|
if (error) { |
|
dev_err(dev, "The firmware update failed(%d)\n", error); |
|
count = error; |
|
} else { |
|
dev_info(dev, "The firmware update succeeded\n"); |
|
|
|
error = mxt_initialize(data); |
|
if (error) |
|
return error; |
|
} |
|
|
|
return count; |
|
} |
|
|
|
static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL); |
|
static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL); |
|
static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL); |
|
static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store); |
|
|
|
static struct attribute *mxt_attrs[] = { |
|
&dev_attr_fw_version.attr, |
|
&dev_attr_hw_version.attr, |
|
&dev_attr_object.attr, |
|
&dev_attr_update_fw.attr, |
|
NULL |
|
}; |
|
|
|
static const struct attribute_group mxt_attr_group = { |
|
.attrs = mxt_attrs, |
|
}; |
|
|
|
static void mxt_start(struct mxt_data *data) |
|
{ |
|
switch (data->suspend_mode) { |
|
case MXT_SUSPEND_T9_CTRL: |
|
mxt_soft_reset(data); |
|
|
|
/* Touch enable */ |
|
/* 0x83 = SCANEN | RPTEN | ENABLE */ |
|
mxt_write_object(data, |
|
MXT_TOUCH_MULTI_T9, MXT_T9_CTRL, 0x83); |
|
break; |
|
|
|
case MXT_SUSPEND_DEEP_SLEEP: |
|
default: |
|
mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN); |
|
|
|
/* Recalibrate since chip has been in deep sleep */ |
|
mxt_t6_command(data, MXT_COMMAND_CALIBRATE, 1, false); |
|
break; |
|
} |
|
} |
|
|
|
static void mxt_stop(struct mxt_data *data) |
|
{ |
|
switch (data->suspend_mode) { |
|
case MXT_SUSPEND_T9_CTRL: |
|
/* Touch disable */ |
|
mxt_write_object(data, |
|
MXT_TOUCH_MULTI_T9, MXT_T9_CTRL, 0); |
|
break; |
|
|
|
case MXT_SUSPEND_DEEP_SLEEP: |
|
default: |
|
mxt_set_t7_power_cfg(data, MXT_POWER_CFG_DEEPSLEEP); |
|
break; |
|
} |
|
} |
|
|
|
static int mxt_input_open(struct input_dev *dev) |
|
{ |
|
struct mxt_data *data = input_get_drvdata(dev); |
|
|
|
mxt_start(data); |
|
|
|
return 0; |
|
} |
|
|
|
static void mxt_input_close(struct input_dev *dev) |
|
{ |
|
struct mxt_data *data = input_get_drvdata(dev); |
|
|
|
mxt_stop(data); |
|
} |
|
|
|
static int mxt_parse_device_properties(struct mxt_data *data) |
|
{ |
|
static const char keymap_property[] = "linux,gpio-keymap"; |
|
struct device *dev = &data->client->dev; |
|
u32 *keymap; |
|
int n_keys; |
|
int error; |
|
|
|
if (device_property_present(dev, keymap_property)) { |
|
n_keys = device_property_count_u32(dev, keymap_property); |
|
if (n_keys <= 0) { |
|
error = n_keys < 0 ? n_keys : -EINVAL; |
|
dev_err(dev, "invalid/malformed '%s' property: %d\n", |
|
keymap_property, error); |
|
return error; |
|
} |
|
|
|
keymap = devm_kmalloc_array(dev, n_keys, sizeof(*keymap), |
|
GFP_KERNEL); |
|
if (!keymap) |
|
return -ENOMEM; |
|
|
|
error = device_property_read_u32_array(dev, keymap_property, |
|
keymap, n_keys); |
|
if (error) { |
|
dev_err(dev, "failed to parse '%s' property: %d\n", |
|
keymap_property, error); |
|
return error; |
|
} |
|
|
|
data->t19_keymap = keymap; |
|
data->t19_num_keys = n_keys; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static const struct dmi_system_id chromebook_T9_suspend_dmi[] = { |
|
{ |
|
.matches = { |
|
DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"), |
|
DMI_MATCH(DMI_PRODUCT_NAME, "Link"), |
|
}, |
|
}, |
|
{ |
|
.matches = { |
|
DMI_MATCH(DMI_PRODUCT_NAME, "Peppy"), |
|
}, |
|
}, |
|
{ } |
|
}; |
|
|
|
static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id) |
|
{ |
|
struct mxt_data *data; |
|
int error; |
|
|
|
/* |
|
* Ignore devices that do not have device properties attached to |
|
* them, as we need help determining whether we are dealing with |
|
* touch screen or touchpad. |
|
* |
|
* So far on x86 the only users of Atmel touch controllers are |
|
* Chromebooks, and chromeos_laptop driver will ensure that |
|
* necessary properties are provided (if firmware does not do that). |
|
*/ |
|
if (!device_property_present(&client->dev, "compatible")) |
|
return -ENXIO; |
|
|
|
/* |
|
* Ignore ACPI devices representing bootloader mode. |
|
* |
|
* This is a bit of a hack: Google Chromebook BIOS creates ACPI |
|
* devices for both application and bootloader modes, but we are |
|
* interested in application mode only (if device is in bootloader |
|
* mode we'll end up switching into application anyway). So far |
|
* application mode addresses were all above 0x40, so we'll use it |
|
* as a threshold. |
|
*/ |
|
if (ACPI_COMPANION(&client->dev) && client->addr < 0x40) |
|
return -ENXIO; |
|
|
|
data = devm_kzalloc(&client->dev, sizeof(struct mxt_data), GFP_KERNEL); |
|
if (!data) |
|
return -ENOMEM; |
|
|
|
snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0", |
|
client->adapter->nr, client->addr); |
|
|
|
data->client = client; |
|
data->irq = client->irq; |
|
i2c_set_clientdata(client, data); |
|
|
|
init_completion(&data->bl_completion); |
|
init_completion(&data->reset_completion); |
|
init_completion(&data->crc_completion); |
|
|
|
data->suspend_mode = dmi_check_system(chromebook_T9_suspend_dmi) ? |
|
MXT_SUSPEND_T9_CTRL : MXT_SUSPEND_DEEP_SLEEP; |
|
|
|
error = mxt_parse_device_properties(data); |
|
if (error) |
|
return error; |
|
|
|
/* |
|
* VDDA is the analog voltage supply 2.57..3.47 V |
|
* VDD is the digital voltage supply 1.71..3.47 V |
|
*/ |
|
data->regulators[0].supply = "vdda"; |
|
data->regulators[1].supply = "vdd"; |
|
error = devm_regulator_bulk_get(&client->dev, ARRAY_SIZE(data->regulators), |
|
data->regulators); |
|
if (error) { |
|
if (error != -EPROBE_DEFER) |
|
dev_err(&client->dev, "Failed to get regulators %d\n", |
|
error); |
|
return error; |
|
} |
|
|
|
/* Request the RESET line as asserted so we go into reset */ |
|
data->reset_gpio = devm_gpiod_get_optional(&client->dev, |
|
"reset", GPIOD_OUT_HIGH); |
|
if (IS_ERR(data->reset_gpio)) { |
|
error = PTR_ERR(data->reset_gpio); |
|
dev_err(&client->dev, "Failed to get reset gpio: %d\n", error); |
|
return error; |
|
} |
|
|
|
error = devm_request_threaded_irq(&client->dev, client->irq, |
|
NULL, mxt_interrupt, IRQF_ONESHOT, |
|
client->name, data); |
|
if (error) { |
|
dev_err(&client->dev, "Failed to register interrupt\n"); |
|
return error; |
|
} |
|
|
|
disable_irq(client->irq); |
|
|
|
error = regulator_bulk_enable(ARRAY_SIZE(data->regulators), |
|
data->regulators); |
|
if (error) { |
|
dev_err(&client->dev, "failed to enable regulators: %d\n", |
|
error); |
|
return error; |
|
} |
|
/* |
|
* The device takes 40ms to come up after power-on according |
|
* to the mXT224 datasheet, page 13. |
|
*/ |
|
msleep(MXT_BACKUP_TIME); |
|
|
|
if (data->reset_gpio) { |
|
/* Wait a while and then de-assert the RESET GPIO line */ |
|
msleep(MXT_RESET_GPIO_TIME); |
|
gpiod_set_value(data->reset_gpio, 0); |
|
msleep(MXT_RESET_INVALID_CHG); |
|
} |
|
|
|
error = mxt_initialize(data); |
|
if (error) |
|
goto err_disable_regulators; |
|
|
|
error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group); |
|
if (error) { |
|
dev_err(&client->dev, "Failure %d creating sysfs group\n", |
|
error); |
|
goto err_free_object; |
|
} |
|
|
|
return 0; |
|
|
|
err_free_object: |
|
mxt_free_input_device(data); |
|
mxt_free_object_table(data); |
|
err_disable_regulators: |
|
regulator_bulk_disable(ARRAY_SIZE(data->regulators), |
|
data->regulators); |
|
return error; |
|
} |
|
|
|
static int mxt_remove(struct i2c_client *client) |
|
{ |
|
struct mxt_data *data = i2c_get_clientdata(client); |
|
|
|
disable_irq(data->irq); |
|
sysfs_remove_group(&client->dev.kobj, &mxt_attr_group); |
|
mxt_free_input_device(data); |
|
mxt_free_object_table(data); |
|
regulator_bulk_disable(ARRAY_SIZE(data->regulators), |
|
data->regulators); |
|
|
|
return 0; |
|
} |
|
|
|
static int __maybe_unused mxt_suspend(struct device *dev) |
|
{ |
|
struct i2c_client *client = to_i2c_client(dev); |
|
struct mxt_data *data = i2c_get_clientdata(client); |
|
struct input_dev *input_dev = data->input_dev; |
|
|
|
if (!input_dev) |
|
return 0; |
|
|
|
mutex_lock(&input_dev->mutex); |
|
|
|
if (input_device_enabled(input_dev)) |
|
mxt_stop(data); |
|
|
|
mutex_unlock(&input_dev->mutex); |
|
|
|
disable_irq(data->irq); |
|
|
|
return 0; |
|
} |
|
|
|
static int __maybe_unused mxt_resume(struct device *dev) |
|
{ |
|
struct i2c_client *client = to_i2c_client(dev); |
|
struct mxt_data *data = i2c_get_clientdata(client); |
|
struct input_dev *input_dev = data->input_dev; |
|
|
|
if (!input_dev) |
|
return 0; |
|
|
|
enable_irq(data->irq); |
|
|
|
mutex_lock(&input_dev->mutex); |
|
|
|
if (input_device_enabled(input_dev)) |
|
mxt_start(data); |
|
|
|
mutex_unlock(&input_dev->mutex); |
|
|
|
return 0; |
|
} |
|
|
|
static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume); |
|
|
|
static const struct of_device_id mxt_of_match[] = { |
|
{ .compatible = "atmel,maxtouch", }, |
|
/* Compatibles listed below are deprecated */ |
|
{ .compatible = "atmel,qt602240_ts", }, |
|
{ .compatible = "atmel,atmel_mxt_ts", }, |
|
{ .compatible = "atmel,atmel_mxt_tp", }, |
|
{ .compatible = "atmel,mXT224", }, |
|
{}, |
|
}; |
|
MODULE_DEVICE_TABLE(of, mxt_of_match); |
|
|
|
#ifdef CONFIG_ACPI |
|
static const struct acpi_device_id mxt_acpi_id[] = { |
|
{ "ATML0000", 0 }, /* Touchpad */ |
|
{ "ATML0001", 0 }, /* Touchscreen */ |
|
{ } |
|
}; |
|
MODULE_DEVICE_TABLE(acpi, mxt_acpi_id); |
|
#endif |
|
|
|
static const struct i2c_device_id mxt_id[] = { |
|
{ "qt602240_ts", 0 }, |
|
{ "atmel_mxt_ts", 0 }, |
|
{ "atmel_mxt_tp", 0 }, |
|
{ "maxtouch", 0 }, |
|
{ "mXT224", 0 }, |
|
{ } |
|
}; |
|
MODULE_DEVICE_TABLE(i2c, mxt_id); |
|
|
|
static struct i2c_driver mxt_driver = { |
|
.driver = { |
|
.name = "atmel_mxt_ts", |
|
.of_match_table = mxt_of_match, |
|
.acpi_match_table = ACPI_PTR(mxt_acpi_id), |
|
.pm = &mxt_pm_ops, |
|
}, |
|
.probe = mxt_probe, |
|
.remove = mxt_remove, |
|
.id_table = mxt_id, |
|
}; |
|
|
|
module_i2c_driver(mxt_driver); |
|
|
|
/* Module information */ |
|
MODULE_AUTHOR("Joonyoung Shim <[email protected]>"); |
|
MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver"); |
|
MODULE_LICENSE("GPL");
|
|
|