![Nick Dyer](/assets/img/avatar_default.png)
If using IRQF_TRIGGER_FALLING, then there is a race here: if the reset completes before we enable the IRQ, then CHG is already low and touch will be broken. This has been seen on Chromebook Pixel 2. A workaround is to reconfig T18 COMMSCONFIG to enable the RETRIGEN bit using mxt-app: mxt-app -W -T18 44 mxt-app --backup Tested-by: Tom Rini <trini@konsulko.com> Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2745 lines
63 KiB
C
2745 lines
63 KiB
C
/*
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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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*
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* Author: Joonyoung Shim <jy0922.shim@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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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/platform_data/atmel_mxt_ts.h>
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#include <linux/input/mt.h>
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#include <linux/interrupt.h>
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#include <linux/of.h>
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#include <linux/slab.h>
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#include <asm/unaligned.h>
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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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/* 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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/* 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_TOUCH_MULTITOUCHSCREEN_T100 100
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/* MXT_GEN_MESSAGE_T5 object */
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#define MXT_RPTID_NOMSG 0xff
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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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/* Define for T6 status byte */
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#define MXT_T6_STATUS_RESET (1 << 7)
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#define MXT_T6_STATUS_OFL (1 << 6)
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#define MXT_T6_STATUS_SIGERR (1 << 5)
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#define MXT_T6_STATUS_CAL (1 << 4)
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#define MXT_T6_STATUS_CFGERR (1 << 3)
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#define MXT_T6_STATUS_COMSERR (1 << 2)
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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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#define MXT_POWER_CFG_RUN 0
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#define MXT_POWER_CFG_DEEPSLEEP 1
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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_ORIENT 9
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#define MXT_T9_RANGE 18
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/* MXT_TOUCH_MULTI_T9 status */
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#define MXT_T9_UNGRIP (1 << 0)
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#define MXT_T9_SUPPRESS (1 << 1)
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#define MXT_T9_AMP (1 << 2)
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#define MXT_T9_VECTOR (1 << 3)
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#define MXT_T9_MOVE (1 << 4)
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#define MXT_T9_RELEASE (1 << 5)
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#define MXT_T9_PRESS (1 << 6)
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#define MXT_T9_DETECT (1 << 7)
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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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/* MXT_TOUCH_MULTI_T9 orient */
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#define MXT_T9_ORIENT_SWITCH (1 << 0)
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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 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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/* 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_XRANGE 13
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#define MXT_T100_YRANGE 24
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#define MXT_T100_CFG_SWITCHXY BIT(5)
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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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#define MXT_T100_DETECT BIT(7)
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#define MXT_T100_TYPE_MASK 0x70
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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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#define MXT_TOUCH_MAJOR_DEFAULT 1
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#define MXT_PRESSURE_DEFAULT 1
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/* Delay times */
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#define MXT_BACKUP_TIME 50 /* 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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/* 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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/* 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 (1 << 5)
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#define MXT_BOOT_ID_MASK 0x1f
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/* Touchscreen absolute values */
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#define MXT_MAX_AREA 0xff
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#define MXT_PIXELS_PER_MM 20
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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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/* 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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const struct mxt_platform_data *pdata;
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struct mxt_object *object_table;
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struct mxt_info info;
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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 xy_switch;
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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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/* 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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u8 T9_reportid_min;
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u8 T9_reportid_max;
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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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/* for fw update in bootloader */
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struct completion bl_completion;
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/* for reset handling */
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struct completion reset_completion;
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/* for config update handling */
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struct completion crc_completion;
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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_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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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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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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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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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 || data->info.family_id >= 0xa2) {
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bootloader = appmode - 0x24;
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break;
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}
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/* Fall through 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,
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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:
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if (wait) {
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/*
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* In application update mode, the interrupt
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* line signals state transitions. We must wait for the
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* CHG assertion before reading the status byte.
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* Once the status byte has been read, the line is deasserted.
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*/
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ret = mxt_wait_for_completion(data, &data->bl_completion,
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MXT_FW_CHG_TIMEOUT);
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if (ret) {
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/*
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* TODO: handle -ERESTARTSYS better by terminating
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* fw update process before returning to userspace
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* by writing length 0x000 to device (iff we are in
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* WAITING_FRAME_DATA state).
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*/
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dev_err(dev, "Update wait error %d\n", ret);
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return ret;
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}
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}
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ret = mxt_bootloader_read(data, &val, 1);
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if (ret)
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return ret;
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if (state == MXT_WAITING_BOOTLOAD_CMD)
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val = mxt_get_bootloader_version(data, val);
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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)
|
|
{
|
|
int ret;
|
|
u8 buf[2];
|
|
|
|
if (unlock) {
|
|
buf[0] = MXT_UNLOCK_CMD_LSB;
|
|
buf[1] = MXT_UNLOCK_CMD_MSB;
|
|
} else {
|
|
buf[0] = 0x01;
|
|
buf[1] = 0x01;
|
|
}
|
|
|
|
ret = mxt_bootloader_write(data, buf, 2);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
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);
|
|
|
|
complete(&data->crc_completion);
|
|
|
|
if (crc != data->config_crc) {
|
|
data->config_crc = crc;
|
|
dev_dbg(dev, "T6 Config Checksum: 0x%06X\n", crc);
|
|
}
|
|
|
|
/* 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;
|
|
const struct mxt_platform_data *pdata = data->pdata;
|
|
int i;
|
|
|
|
for (i = 0; i < pdata->t19_num_keys; i++) {
|
|
if (pdata->t19_keymap[i] == KEY_RESERVED)
|
|
continue;
|
|
|
|
/* Active-low switch */
|
|
input_report_key(input, pdata->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->pdata->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_state(input_dev,
|
|
MT_TOOL_FINGER, 0);
|
|
mxt_input_sync(data);
|
|
}
|
|
|
|
/* 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_state(input_dev, MT_TOOL_FINGER, 0);
|
|
}
|
|
|
|
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_state(input_dev, 0, 0);
|
|
}
|
|
|
|
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);
|
|
|
|
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(100);
|
|
|
|
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_prepare_cfg_mem(struct mxt_data *data,
|
|
const struct firmware *cfg,
|
|
unsigned int data_pos,
|
|
unsigned int cfg_start_ofs,
|
|
u8 *config_mem,
|
|
size_t config_mem_size)
|
|
{
|
|
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 (data_pos < cfg->size) {
|
|
/* Read type, instance, length */
|
|
ret = sscanf(cfg->data + data_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;
|
|
}
|
|
data_pos += offset;
|
|
|
|
object = mxt_get_object(data, type);
|
|
if (!object) {
|
|
/* Skip object */
|
|
for (i = 0; i < size; i++) {
|
|
ret = sscanf(cfg->data + data_pos, "%hhx%n",
|
|
&val, &offset);
|
|
if (ret != 1) {
|
|
dev_err(dev, "Bad format in T%d at %d\n",
|
|
type, i);
|
|
return -EINVAL;
|
|
}
|
|
data_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->data + data_pos, "%hhx%n",
|
|
&val,
|
|
&offset);
|
|
if (ret != 1) {
|
|
dev_err(dev, "Bad format in T%d at %d\n",
|
|
type, i);
|
|
return -EINVAL;
|
|
}
|
|
data_pos += offset;
|
|
|
|
if (i > mxt_obj_size(object))
|
|
continue;
|
|
|
|
byte_offset = reg + i - cfg_start_ofs;
|
|
|
|
if (byte_offset >= 0 && byte_offset < config_mem_size) {
|
|
*(config_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, unsigned int cfg_start,
|
|
u8 *config_mem, size_t config_mem_size)
|
|
{
|
|
unsigned int byte_offset = 0;
|
|
int error;
|
|
|
|
/* Write configuration as blocks */
|
|
while (byte_offset < config_mem_size) {
|
|
unsigned int size = config_mem_size - byte_offset;
|
|
|
|
if (size > MXT_MAX_BLOCK_WRITE)
|
|
size = MXT_MAX_BLOCK_WRITE;
|
|
|
|
error = __mxt_write_reg(data->client,
|
|
cfg_start + byte_offset,
|
|
size, config_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 *cfg)
|
|
{
|
|
struct device *dev = &data->client->dev;
|
|
struct mxt_info cfg_info;
|
|
int ret;
|
|
int offset;
|
|
int data_pos;
|
|
int i;
|
|
int cfg_start_ofs;
|
|
u32 info_crc, config_crc, calculated_crc;
|
|
u8 *config_mem;
|
|
size_t config_mem_size;
|
|
|
|
mxt_update_crc(data, MXT_COMMAND_REPORTALL, 1);
|
|
|
|
if (strncmp(cfg->data, MXT_CFG_MAGIC, strlen(MXT_CFG_MAGIC))) {
|
|
dev_err(dev, "Unrecognised config file\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
data_pos = strlen(MXT_CFG_MAGIC);
|
|
|
|
/* Load information block and check */
|
|
for (i = 0; i < sizeof(struct mxt_info); i++) {
|
|
ret = sscanf(cfg->data + data_pos, "%hhx%n",
|
|
(unsigned char *)&cfg_info + i,
|
|
&offset);
|
|
if (ret != 1) {
|
|
dev_err(dev, "Bad format\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
data_pos += offset;
|
|
}
|
|
|
|
if (cfg_info.family_id != data->info.family_id) {
|
|
dev_err(dev, "Family ID mismatch!\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (cfg_info.variant_id != data->info.variant_id) {
|
|
dev_err(dev, "Variant ID mismatch!\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Read CRCs */
|
|
ret = sscanf(cfg->data + data_pos, "%x%n", &info_crc, &offset);
|
|
if (ret != 1) {
|
|
dev_err(dev, "Bad format: failed to parse Info CRC\n");
|
|
return -EINVAL;
|
|
}
|
|
data_pos += offset;
|
|
|
|
ret = sscanf(cfg->data + data_pos, "%x%n", &config_crc, &offset);
|
|
if (ret != 1) {
|
|
dev_err(dev, "Bad format: failed to parse Config CRC\n");
|
|
return -EINVAL;
|
|
}
|
|
data_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);
|
|
return 0;
|
|
} 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;
|
|
config_mem_size = data->mem_size - cfg_start_ofs;
|
|
config_mem = kzalloc(config_mem_size, GFP_KERNEL);
|
|
if (!config_mem) {
|
|
dev_err(dev, "Failed to allocate memory\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
ret = mxt_prepare_cfg_mem(data, cfg, data_pos, cfg_start_ofs,
|
|
config_mem, config_mem_size);
|
|
if (ret)
|
|
goto release_mem;
|
|
|
|
/* Calculate crc of the received configs (not the raw config file) */
|
|
if (data->T7_address < cfg_start_ofs) {
|
|
dev_err(dev, "Bad T7 address, T7addr = %x, config offset %x\n",
|
|
data->T7_address, cfg_start_ofs);
|
|
ret = 0;
|
|
goto release_mem;
|
|
}
|
|
|
|
calculated_crc = mxt_calculate_crc(config_mem,
|
|
data->T7_address - cfg_start_ofs,
|
|
config_mem_size);
|
|
|
|
if (config_crc > 0 && config_crc != calculated_crc)
|
|
dev_warn(dev, "Config CRC error, calculated=%06X, file=%06X\n",
|
|
calculated_crc, config_crc);
|
|
|
|
ret = mxt_upload_cfg_mem(data, cfg_start_ofs,
|
|
config_mem, config_mem_size);
|
|
if (ret)
|
|
goto release_mem;
|
|
|
|
mxt_update_crc(data, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE);
|
|
|
|
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(config_mem);
|
|
return ret;
|
|
}
|
|
|
|
static int mxt_get_info(struct mxt_data *data)
|
|
{
|
|
struct i2c_client *client = data->client;
|
|
struct mxt_info *info = &data->info;
|
|
int error;
|
|
|
|
/* Read 7-byte info block starting at address 0 */
|
|
error = __mxt_read_reg(client, 0, sizeof(*info), info);
|
|
if (error)
|
|
return error;
|
|
|
|
return 0;
|
|
}
|
|
|
|
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)
|
|
{
|
|
kfree(data->object_table);
|
|
data->object_table = 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->T9_reportid_min = 0;
|
|
data->T9_reportid_max = 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_get_object_table(struct mxt_data *data)
|
|
{
|
|
struct i2c_client *client = data->client;
|
|
size_t table_size;
|
|
struct mxt_object *object_table;
|
|
int error;
|
|
int i;
|
|
u8 reportid;
|
|
u16 end_address;
|
|
|
|
table_size = data->info.object_num * sizeof(struct mxt_object);
|
|
object_table = kzalloc(table_size, GFP_KERNEL);
|
|
if (!object_table) {
|
|
dev_err(&data->client->dev, "Failed to allocate memory\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
error = __mxt_read_reg(client, MXT_OBJECT_START, table_size,
|
|
object_table);
|
|
if (error) {
|
|
kfree(object_table);
|
|
return error;
|
|
}
|
|
|
|
/* 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_TOUCH_MULTI_T9:
|
|
data->multitouch = MXT_TOUCH_MULTI_T9;
|
|
data->T9_reportid_min = min_id;
|
|
data->T9_reportid_max = max_id;
|
|
data->num_touchids = object->num_report_ids
|
|
* mxt_obj_instances(object);
|
|
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");
|
|
error = -EINVAL;
|
|
goto free_object_table;
|
|
}
|
|
|
|
data->msg_buf = kcalloc(data->max_reportid,
|
|
data->T5_msg_size, GFP_KERNEL);
|
|
if (!data->msg_buf) {
|
|
dev_err(&client->dev, "Failed to allocate message buffer\n");
|
|
error = -ENOMEM;
|
|
goto free_object_table;
|
|
}
|
|
|
|
data->object_table = object_table;
|
|
|
|
return 0;
|
|
|
|
free_object_table:
|
|
mxt_free_object_table(data);
|
|
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_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;
|
|
|
|
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);
|
|
|
|
/* 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;
|
|
|
|
/* 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)
|
|
{
|
|
const struct mxt_platform_data *pdata = data->pdata;
|
|
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 < pdata->t19_num_keys; i++)
|
|
if (pdata->t19_keymap[i] != KEY_RESERVED)
|
|
input_set_capability(input_dev, EV_KEY,
|
|
pdata->t19_keymap[i]);
|
|
}
|
|
|
|
static int mxt_initialize_input_device(struct mxt_data *data)
|
|
{
|
|
const struct mxt_platform_data *pdata = data->pdata;
|
|
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) {
|
|
dev_err(dev, "Failed to allocate memory\n");
|
|
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 (pdata->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_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);
|
|
}
|
|
|
|
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_get_info(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);
|
|
}
|
|
|
|
/* Get object table information */
|
|
error = mxt_get_object_table(data);
|
|
if (error) {
|
|
dev_err(&client->dev, "Error %d reading object table\n", error);
|
|
return error;
|
|
}
|
|
|
|
error = mxt_acquire_irq(data);
|
|
if (error)
|
|
goto err_free_object_table;
|
|
|
|
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);
|
|
goto err_free_object_table;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_free_object_table:
|
|
mxt_free_object_table(data);
|
|
return error;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
static int mxt_configure_objects(struct mxt_data *data,
|
|
const struct firmware *cfg)
|
|
{
|
|
struct device *dev = &data->client->dev;
|
|
struct mxt_info *info = &data->info;
|
|
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");
|
|
}
|
|
|
|
dev_info(dev,
|
|
"Family: %u Variant: %u Firmware V%u.%u.%02X Objects: %u\n",
|
|
info->family_id, info->variant_id, info->version >> 4,
|
|
info->version & 0xf, info->build, info->object_num);
|
|
|
|
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->pdata->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->pdata->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);
|
|
}
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client)
|
|
{
|
|
struct mxt_platform_data *pdata;
|
|
struct device_node *np = client->dev.of_node;
|
|
u32 *keymap;
|
|
int proplen, ret;
|
|
|
|
if (!np)
|
|
return ERR_PTR(-ENOENT);
|
|
|
|
pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
|
|
if (!pdata)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
if (of_find_property(np, "linux,gpio-keymap", &proplen)) {
|
|
pdata->t19_num_keys = proplen / sizeof(u32);
|
|
|
|
keymap = devm_kzalloc(&client->dev,
|
|
pdata->t19_num_keys * sizeof(keymap[0]),
|
|
GFP_KERNEL);
|
|
if (!keymap)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
ret = of_property_read_u32_array(np, "linux,gpio-keymap",
|
|
keymap, pdata->t19_num_keys);
|
|
if (ret)
|
|
dev_warn(&client->dev,
|
|
"Couldn't read linux,gpio-keymap: %d\n", ret);
|
|
|
|
pdata->t19_keymap = keymap;
|
|
}
|
|
|
|
pdata->suspend_mode = MXT_SUSPEND_DEEP_SLEEP;
|
|
|
|
return pdata;
|
|
}
|
|
#else
|
|
static const struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client)
|
|
{
|
|
return ERR_PTR(-ENOENT);
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_ACPI
|
|
|
|
struct mxt_acpi_platform_data {
|
|
const char *hid;
|
|
struct mxt_platform_data pdata;
|
|
};
|
|
|
|
static unsigned int samus_touchpad_buttons[] = {
|
|
KEY_RESERVED,
|
|
KEY_RESERVED,
|
|
KEY_RESERVED,
|
|
BTN_LEFT
|
|
};
|
|
|
|
static struct mxt_acpi_platform_data samus_platform_data[] = {
|
|
{
|
|
/* Touchpad */
|
|
.hid = "ATML0000",
|
|
.pdata = {
|
|
.t19_num_keys = ARRAY_SIZE(samus_touchpad_buttons),
|
|
.t19_keymap = samus_touchpad_buttons,
|
|
},
|
|
},
|
|
{
|
|
/* Touchscreen */
|
|
.hid = "ATML0001",
|
|
},
|
|
{ }
|
|
};
|
|
|
|
static unsigned int chromebook_tp_buttons[] = {
|
|
KEY_RESERVED,
|
|
KEY_RESERVED,
|
|
KEY_RESERVED,
|
|
KEY_RESERVED,
|
|
KEY_RESERVED,
|
|
BTN_LEFT
|
|
};
|
|
|
|
static struct mxt_acpi_platform_data chromebook_platform_data[] = {
|
|
{
|
|
/* Touchpad */
|
|
.hid = "ATML0000",
|
|
.pdata = {
|
|
.t19_num_keys = ARRAY_SIZE(chromebook_tp_buttons),
|
|
.t19_keymap = chromebook_tp_buttons,
|
|
},
|
|
},
|
|
{
|
|
/* Touchscreen */
|
|
.hid = "ATML0001",
|
|
},
|
|
{ }
|
|
};
|
|
|
|
static const struct dmi_system_id mxt_dmi_table[] = {
|
|
{
|
|
/* 2015 Google Pixel */
|
|
.ident = "Chromebook Pixel 2",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "Samus"),
|
|
},
|
|
.driver_data = samus_platform_data,
|
|
},
|
|
{
|
|
/* Other Google Chromebooks */
|
|
.ident = "Chromebook",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
|
|
},
|
|
.driver_data = chromebook_platform_data,
|
|
},
|
|
{ }
|
|
};
|
|
|
|
static const struct mxt_platform_data *mxt_parse_acpi(struct i2c_client *client)
|
|
{
|
|
struct acpi_device *adev;
|
|
const struct dmi_system_id *system_id;
|
|
const struct mxt_acpi_platform_data *acpi_pdata;
|
|
|
|
/*
|
|
* 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 (client->addr < 0x40)
|
|
return ERR_PTR(-ENXIO);
|
|
|
|
adev = ACPI_COMPANION(&client->dev);
|
|
if (!adev)
|
|
return ERR_PTR(-ENOENT);
|
|
|
|
system_id = dmi_first_match(mxt_dmi_table);
|
|
if (!system_id)
|
|
return ERR_PTR(-ENOENT);
|
|
|
|
acpi_pdata = system_id->driver_data;
|
|
if (!acpi_pdata)
|
|
return ERR_PTR(-ENOENT);
|
|
|
|
while (acpi_pdata->hid) {
|
|
if (!strcmp(acpi_device_hid(adev), acpi_pdata->hid))
|
|
return &acpi_pdata->pdata;
|
|
|
|
acpi_pdata++;
|
|
}
|
|
|
|
return ERR_PTR(-ENOENT);
|
|
}
|
|
#else
|
|
static const struct mxt_platform_data *mxt_parse_acpi(struct i2c_client *client)
|
|
{
|
|
return ERR_PTR(-ENOENT);
|
|
}
|
|
#endif
|
|
|
|
static const struct mxt_platform_data *
|
|
mxt_get_platform_data(struct i2c_client *client)
|
|
{
|
|
const struct mxt_platform_data *pdata;
|
|
|
|
pdata = dev_get_platdata(&client->dev);
|
|
if (pdata)
|
|
return pdata;
|
|
|
|
pdata = mxt_parse_dt(client);
|
|
if (!IS_ERR(pdata) || PTR_ERR(pdata) != -ENOENT)
|
|
return pdata;
|
|
|
|
pdata = mxt_parse_acpi(client);
|
|
if (!IS_ERR(pdata) || PTR_ERR(pdata) != -ENOENT)
|
|
return pdata;
|
|
|
|
dev_err(&client->dev, "No platform data specified\n");
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id)
|
|
{
|
|
struct mxt_data *data;
|
|
const struct mxt_platform_data *pdata;
|
|
int error;
|
|
|
|
pdata = mxt_get_platform_data(client);
|
|
if (IS_ERR(pdata))
|
|
return PTR_ERR(pdata);
|
|
|
|
data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
|
|
if (!data) {
|
|
dev_err(&client->dev, "Failed to allocate memory\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
|
|
client->adapter->nr, client->addr);
|
|
|
|
data->client = client;
|
|
data->pdata = pdata;
|
|
data->irq = client->irq;
|
|
i2c_set_clientdata(client, data);
|
|
|
|
init_completion(&data->bl_completion);
|
|
init_completion(&data->reset_completion);
|
|
init_completion(&data->crc_completion);
|
|
|
|
error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
|
|
pdata->irqflags | IRQF_ONESHOT,
|
|
client->name, data);
|
|
if (error) {
|
|
dev_err(&client->dev, "Failed to register interrupt\n");
|
|
goto err_free_mem;
|
|
}
|
|
|
|
disable_irq(client->irq);
|
|
|
|
error = mxt_initialize(data);
|
|
if (error)
|
|
goto err_free_irq;
|
|
|
|
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_free_irq:
|
|
free_irq(client->irq, data);
|
|
err_free_mem:
|
|
kfree(data);
|
|
return error;
|
|
}
|
|
|
|
static int mxt_remove(struct i2c_client *client)
|
|
{
|
|
struct mxt_data *data = i2c_get_clientdata(client);
|
|
|
|
sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
|
|
free_irq(data->irq, data);
|
|
mxt_free_input_device(data);
|
|
mxt_free_object_table(data);
|
|
kfree(data);
|
|
|
|
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_dev->users)
|
|
mxt_stop(data);
|
|
|
|
mutex_unlock(&input_dev->mutex);
|
|
|
|
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;
|
|
|
|
mutex_lock(&input_dev->mutex);
|
|
|
|
if (input_dev->users)
|
|
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", },
|
|
{},
|
|
};
|
|
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 = of_match_ptr(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 <jy0922.shim@samsung.com>");
|
|
MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
|
|
MODULE_LICENSE("GPL");
|