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linux/drivers/input/touchscreen/qt602240_ts.c
Joonyoung Shim 4cf51c383d Input: Add ATMEL QT602240 touchscreen driver 
The chip's full name is AT42QT602240 or ATMXT224. This is a capacitive
touchscreen supporting 10-contact multitouch and using I2C interface.

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Acked-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2010-07-14 21:58:52 -07:00

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/*
* AT42QT602240/ATMXT224 Touchscreen driver
*
* Copyright (C) 2010 Samsung Electronics Co.Ltd
* Author: Joonyoung Shim <jy0922.shim@samsung.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/i2c.h>
#include <linux/i2c/qt602240_ts.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
/* Version */
#define QT602240_VER_20 20
#define QT602240_VER_21 21
#define QT602240_VER_22 22
/* Slave addresses */
#define QT602240_APP_LOW 0x4a
#define QT602240_APP_HIGH 0x4b
#define QT602240_BOOT_LOW 0x24
#define QT602240_BOOT_HIGH 0x25
/* Firmware */
#define QT602240_FW_NAME "qt602240.fw"
/* Registers */
#define QT602240_FAMILY_ID 0x00
#define QT602240_VARIANT_ID 0x01
#define QT602240_VERSION 0x02
#define QT602240_BUILD 0x03
#define QT602240_MATRIX_X_SIZE 0x04
#define QT602240_MATRIX_Y_SIZE 0x05
#define QT602240_OBJECT_NUM 0x06
#define QT602240_OBJECT_START 0x07
#define QT602240_OBJECT_SIZE 6
/* Object types */
#define QT602240_DEBUG_DIAGNOSTIC 37
#define QT602240_GEN_MESSAGE 5
#define QT602240_GEN_COMMAND 6
#define QT602240_GEN_POWER 7
#define QT602240_GEN_ACQUIRE 8
#define QT602240_TOUCH_MULTI 9
#define QT602240_TOUCH_KEYARRAY 15
#define QT602240_TOUCH_PROXIMITY 23
#define QT602240_PROCI_GRIPFACE 20
#define QT602240_PROCG_NOISE 22
#define QT602240_PROCI_ONETOUCH 24
#define QT602240_PROCI_TWOTOUCH 27
#define QT602240_SPT_COMMSCONFIG 18 /* firmware ver 21 over */
#define QT602240_SPT_GPIOPWM 19
#define QT602240_SPT_SELFTEST 25
#define QT602240_SPT_CTECONFIG 28
#define QT602240_SPT_USERDATA 38 /* firmware ver 21 over */
/* QT602240_GEN_COMMAND field */
#define QT602240_COMMAND_RESET 0
#define QT602240_COMMAND_BACKUPNV 1
#define QT602240_COMMAND_CALIBRATE 2
#define QT602240_COMMAND_REPORTALL 3
#define QT602240_COMMAND_DIAGNOSTIC 5
/* QT602240_GEN_POWER field */
#define QT602240_POWER_IDLEACQINT 0
#define QT602240_POWER_ACTVACQINT 1
#define QT602240_POWER_ACTV2IDLETO 2
/* QT602240_GEN_ACQUIRE field */
#define QT602240_ACQUIRE_CHRGTIME 0
#define QT602240_ACQUIRE_TCHDRIFT 2
#define QT602240_ACQUIRE_DRIFTST 3
#define QT602240_ACQUIRE_TCHAUTOCAL 4
#define QT602240_ACQUIRE_SYNC 5
#define QT602240_ACQUIRE_ATCHCALST 6
#define QT602240_ACQUIRE_ATCHCALSTHR 7
/* QT602240_TOUCH_MULTI field */
#define QT602240_TOUCH_CTRL 0
#define QT602240_TOUCH_XORIGIN 1
#define QT602240_TOUCH_YORIGIN 2
#define QT602240_TOUCH_XSIZE 3
#define QT602240_TOUCH_YSIZE 4
#define QT602240_TOUCH_BLEN 6
#define QT602240_TOUCH_TCHTHR 7
#define QT602240_TOUCH_TCHDI 8
#define QT602240_TOUCH_ORIENT 9
#define QT602240_TOUCH_MOVHYSTI 11
#define QT602240_TOUCH_MOVHYSTN 12
#define QT602240_TOUCH_NUMTOUCH 14
#define QT602240_TOUCH_MRGHYST 15
#define QT602240_TOUCH_MRGTHR 16
#define QT602240_TOUCH_AMPHYST 17
#define QT602240_TOUCH_XRANGE_LSB 18
#define QT602240_TOUCH_XRANGE_MSB 19
#define QT602240_TOUCH_YRANGE_LSB 20
#define QT602240_TOUCH_YRANGE_MSB 21
#define QT602240_TOUCH_XLOCLIP 22
#define QT602240_TOUCH_XHICLIP 23
#define QT602240_TOUCH_YLOCLIP 24
#define QT602240_TOUCH_YHICLIP 25
#define QT602240_TOUCH_XEDGECTRL 26
#define QT602240_TOUCH_XEDGEDIST 27
#define QT602240_TOUCH_YEDGECTRL 28
#define QT602240_TOUCH_YEDGEDIST 29
#define QT602240_TOUCH_JUMPLIMIT 30 /* firmware ver 22 over */
/* QT602240_PROCI_GRIPFACE field */
#define QT602240_GRIPFACE_CTRL 0
#define QT602240_GRIPFACE_XLOGRIP 1
#define QT602240_GRIPFACE_XHIGRIP 2
#define QT602240_GRIPFACE_YLOGRIP 3
#define QT602240_GRIPFACE_YHIGRIP 4
#define QT602240_GRIPFACE_MAXTCHS 5
#define QT602240_GRIPFACE_SZTHR1 7
#define QT602240_GRIPFACE_SZTHR2 8
#define QT602240_GRIPFACE_SHPTHR1 9
#define QT602240_GRIPFACE_SHPTHR2 10
#define QT602240_GRIPFACE_SUPEXTTO 11
/* QT602240_PROCI_NOISE field */
#define QT602240_NOISE_CTRL 0
#define QT602240_NOISE_OUTFLEN 1
#define QT602240_NOISE_GCAFUL_LSB 3
#define QT602240_NOISE_GCAFUL_MSB 4
#define QT602240_NOISE_GCAFLL_LSB 5
#define QT602240_NOISE_GCAFLL_MSB 6
#define QT602240_NOISE_ACTVGCAFVALID 7
#define QT602240_NOISE_NOISETHR 8
#define QT602240_NOISE_FREQHOPSCALE 10
#define QT602240_NOISE_FREQ0 11
#define QT602240_NOISE_FREQ1 12
#define QT602240_NOISE_FREQ2 13
#define QT602240_NOISE_FREQ3 14
#define QT602240_NOISE_FREQ4 15
#define QT602240_NOISE_IDLEGCAFVALID 16
/* QT602240_SPT_COMMSCONFIG */
#define QT602240_COMMS_CTRL 0
#define QT602240_COMMS_CMD 1
/* QT602240_SPT_CTECONFIG field */
#define QT602240_CTE_CTRL 0
#define QT602240_CTE_CMD 1
#define QT602240_CTE_MODE 2
#define QT602240_CTE_IDLEGCAFDEPTH 3
#define QT602240_CTE_ACTVGCAFDEPTH 4
#define QT602240_CTE_VOLTAGE 5 /* firmware ver 21 over */
#define QT602240_VOLTAGE_DEFAULT 2700000
#define QT602240_VOLTAGE_STEP 10000
/* Define for QT602240_GEN_COMMAND */
#define QT602240_BOOT_VALUE 0xa5
#define QT602240_BACKUP_VALUE 0x55
#define QT602240_BACKUP_TIME 25 /* msec */
#define QT602240_RESET_TIME 65 /* msec */
#define QT602240_FWRESET_TIME 175 /* msec */
/* Command to unlock bootloader */
#define QT602240_UNLOCK_CMD_MSB 0xaa
#define QT602240_UNLOCK_CMD_LSB 0xdc
/* Bootloader mode status */
#define QT602240_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */
#define QT602240_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */
#define QT602240_FRAME_CRC_CHECK 0x02
#define QT602240_FRAME_CRC_FAIL 0x03
#define QT602240_FRAME_CRC_PASS 0x04
#define QT602240_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */
#define QT602240_BOOT_STATUS_MASK 0x3f
/* Touch status */
#define QT602240_SUPPRESS (1 << 1)
#define QT602240_AMP (1 << 2)
#define QT602240_VECTOR (1 << 3)
#define QT602240_MOVE (1 << 4)
#define QT602240_RELEASE (1 << 5)
#define QT602240_PRESS (1 << 6)
#define QT602240_DETECT (1 << 7)
/* Touchscreen absolute values */
#define QT602240_MAX_XC 0x3ff
#define QT602240_MAX_YC 0x3ff
#define QT602240_MAX_AREA 0xff
#define QT602240_MAX_FINGER 10
/* Initial register values recommended from chip vendor */
static const u8 init_vals_ver_20[] = {
/* QT602240_GEN_COMMAND(6) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* QT602240_GEN_POWER(7) */
0x20, 0xff, 0x32,
/* QT602240_GEN_ACQUIRE(8) */
0x08, 0x05, 0x05, 0x00, 0x00, 0x00, 0x05, 0x14,
/* QT602240_TOUCH_MULTI(9) */
0x00, 0x00, 0x00, 0x11, 0x0a, 0x00, 0x00, 0x00, 0x02, 0x00,
0x00, 0x01, 0x01, 0x0e, 0x0a, 0x0a, 0x0a, 0x0a, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x88, 0x64,
/* QT602240_TOUCH_KEYARRAY(15) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00,
/* QT602240_SPT_GPIOPWM(19) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00,
/* QT602240_PROCI_GRIPFACE(20) */
0x00, 0x64, 0x64, 0x64, 0x64, 0x00, 0x00, 0x1e, 0x14, 0x04,
0x1e, 0x00,
/* QT602240_PROCG_NOISE(22) */
0x05, 0x00, 0x00, 0x19, 0x00, 0xe7, 0xff, 0x04, 0x32, 0x00,
0x01, 0x0a, 0x0f, 0x14, 0x00, 0x00, 0xe8,
/* QT602240_TOUCH_PROXIMITY(23) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00,
/* QT602240_PROCI_ONETOUCH(24) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* QT602240_SPT_SELFTEST(25) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
/* QT602240_PROCI_TWOTOUCH(27) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* QT602240_SPT_CTECONFIG(28) */
0x00, 0x00, 0x00, 0x04, 0x08,
};
static const u8 init_vals_ver_21[] = {
/* QT602240_GEN_COMMAND(6) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* QT602240_GEN_POWER(7) */
0x20, 0xff, 0x32,
/* QT602240_GEN_ACQUIRE(8) */
0x0a, 0x00, 0x05, 0x00, 0x00, 0x00, 0x09, 0x23,
/* QT602240_TOUCH_MULTI(9) */
0x00, 0x00, 0x00, 0x13, 0x0b, 0x00, 0x00, 0x00, 0x02, 0x00,
0x00, 0x01, 0x01, 0x0e, 0x0a, 0x0a, 0x0a, 0x0a, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* QT602240_TOUCH_KEYARRAY(15) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00,
/* QT602240_SPT_GPIOPWM(19) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* QT602240_PROCI_GRIPFACE(20) */
0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x50, 0x28, 0x04,
0x0f, 0x0a,
/* QT602240_PROCG_NOISE(22) */
0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x23, 0x00,
0x00, 0x05, 0x0f, 0x19, 0x23, 0x2d, 0x03,
/* QT602240_TOUCH_PROXIMITY(23) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00,
/* QT602240_PROCI_ONETOUCH(24) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* QT602240_SPT_SELFTEST(25) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
/* QT602240_PROCI_TWOTOUCH(27) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* QT602240_SPT_CTECONFIG(28) */
0x00, 0x00, 0x00, 0x08, 0x10, 0x00,
};
static const u8 init_vals_ver_22[] = {
/* QT602240_GEN_COMMAND(6) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* QT602240_GEN_POWER(7) */
0x20, 0xff, 0x32,
/* QT602240_GEN_ACQUIRE(8) */
0x0a, 0x00, 0x05, 0x00, 0x00, 0x00, 0x09, 0x23,
/* QT602240_TOUCH_MULTI(9) */
0x00, 0x00, 0x00, 0x13, 0x0b, 0x00, 0x00, 0x00, 0x02, 0x00,
0x00, 0x01, 0x01, 0x0e, 0x0a, 0x0a, 0x0a, 0x0a, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00,
/* QT602240_TOUCH_KEYARRAY(15) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00,
/* QT602240_SPT_GPIOPWM(19) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* QT602240_PROCI_GRIPFACE(20) */
0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x50, 0x28, 0x04,
0x0f, 0x0a,
/* QT602240_PROCG_NOISE(22) */
0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x23, 0x00,
0x00, 0x05, 0x0f, 0x19, 0x23, 0x2d, 0x03,
/* QT602240_TOUCH_PROXIMITY(23) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00,
/* QT602240_PROCI_ONETOUCH(24) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* QT602240_SPT_SELFTEST(25) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
/* QT602240_PROCI_TWOTOUCH(27) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* QT602240_SPT_CTECONFIG(28) */
0x00, 0x00, 0x00, 0x08, 0x10, 0x00,
};
struct qt602240_info {
u8 family_id;
u8 variant_id;
u8 version;
u8 build;
u8 matrix_xsize;
u8 matrix_ysize;
u8 object_num;
};
struct qt602240_object {
u8 type;
u16 start_address;
u8 size;
u8 instances;
u8 num_report_ids;
/* to map object and message */
u8 max_reportid;
};
struct qt602240_message {
u8 reportid;
u8 message[7];
u8 checksum;
};
struct qt602240_finger {
int status;
int x;
int y;
int area;
};
/* Each client has this additional data */
struct qt602240_data {
struct i2c_client *client;
struct input_dev *input_dev;
const struct qt602240_platform_data *pdata;
struct qt602240_object *object_table;
struct qt602240_info info;
struct qt602240_finger finger[QT602240_MAX_FINGER];
unsigned int irq;
};
static bool qt602240_object_readable(unsigned int type)
{
switch (type) {
case QT602240_GEN_MESSAGE:
case QT602240_GEN_COMMAND:
case QT602240_GEN_POWER:
case QT602240_GEN_ACQUIRE:
case QT602240_TOUCH_MULTI:
case QT602240_TOUCH_KEYARRAY:
case QT602240_TOUCH_PROXIMITY:
case QT602240_PROCI_GRIPFACE:
case QT602240_PROCG_NOISE:
case QT602240_PROCI_ONETOUCH:
case QT602240_PROCI_TWOTOUCH:
case QT602240_SPT_COMMSCONFIG:
case QT602240_SPT_GPIOPWM:
case QT602240_SPT_SELFTEST:
case QT602240_SPT_CTECONFIG:
case QT602240_SPT_USERDATA:
return true;
default:
return false;
}
}
static bool qt602240_object_writable(unsigned int type)
{
switch (type) {
case QT602240_GEN_COMMAND:
case QT602240_GEN_POWER:
case QT602240_GEN_ACQUIRE:
case QT602240_TOUCH_MULTI:
case QT602240_TOUCH_KEYARRAY:
case QT602240_TOUCH_PROXIMITY:
case QT602240_PROCI_GRIPFACE:
case QT602240_PROCG_NOISE:
case QT602240_PROCI_ONETOUCH:
case QT602240_PROCI_TWOTOUCH:
case QT602240_SPT_GPIOPWM:
case QT602240_SPT_SELFTEST:
case QT602240_SPT_CTECONFIG:
return true;
default:
return false;
}
}
static void qt602240_dump_message(struct device *dev,
struct qt602240_message *message)
{
dev_dbg(dev, "reportid:\t0x%x\n", message->reportid);
dev_dbg(dev, "message1:\t0x%x\n", message->message[0]);
dev_dbg(dev, "message2:\t0x%x\n", message->message[1]);
dev_dbg(dev, "message3:\t0x%x\n", message->message[2]);
dev_dbg(dev, "message4:\t0x%x\n", message->message[3]);
dev_dbg(dev, "message5:\t0x%x\n", message->message[4]);
dev_dbg(dev, "message6:\t0x%x\n", message->message[5]);
dev_dbg(dev, "message7:\t0x%x\n", message->message[6]);
dev_dbg(dev, "checksum:\t0x%x\n", message->checksum);
}
static int qt602240_check_bootloader(struct i2c_client *client,
unsigned int state)
{
u8 val;
recheck:
if (i2c_master_recv(client, &val, 1) != 1) {
dev_err(&client->dev, "%s: i2c recv failed\n", __func__);
return -EIO;
}
switch (state) {
case QT602240_WAITING_BOOTLOAD_CMD:
case QT602240_WAITING_FRAME_DATA:
val &= ~QT602240_BOOT_STATUS_MASK;
break;
case QT602240_FRAME_CRC_PASS:
if (val == QT602240_FRAME_CRC_CHECK)
goto recheck;
break;
default:
return -EINVAL;
}
if (val != state) {
dev_err(&client->dev, "Unvalid bootloader mode state\n");
return -EINVAL;
}
return 0;
}
static int qt602240_unlock_bootloader(struct i2c_client *client)
{
u8 buf[2];
buf[0] = QT602240_UNLOCK_CMD_LSB;
buf[1] = QT602240_UNLOCK_CMD_MSB;
if (i2c_master_send(client, buf, 2) != 2) {
dev_err(&client->dev, "%s: i2c send failed\n", __func__);
return -EIO;
}
return 0;
}
static int qt602240_fw_write(struct i2c_client *client,
const u8 *data, unsigned int frame_size)
{
if (i2c_master_send(client, data, frame_size) != frame_size) {
dev_err(&client->dev, "%s: i2c send failed\n", __func__);
return -EIO;
}
return 0;
}
static int __qt602240_read_reg(struct i2c_client *client,
u16 reg, u16 len, void *val)
{
struct i2c_msg xfer[2];
u8 buf[2];
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;
if (i2c_transfer(client->adapter, xfer, 2) != 2) {
dev_err(&client->dev, "%s: i2c transfer failed\n", __func__);
return -EIO;
}
return 0;
}
static int qt602240_read_reg(struct i2c_client *client, u16 reg, u8 *val)
{
return __qt602240_read_reg(client, reg, 1, val);
}
static int qt602240_write_reg(struct i2c_client *client, u16 reg, u8 val)
{
u8 buf[3];
buf[0] = reg & 0xff;
buf[1] = (reg >> 8) & 0xff;
buf[2] = val;
if (i2c_master_send(client, buf, 3) != 3) {
dev_err(&client->dev, "%s: i2c send failed\n", __func__);
return -EIO;
}
return 0;
}
static int qt602240_read_object_table(struct i2c_client *client,
u16 reg, u8 *object_buf)
{
return __qt602240_read_reg(client, reg, QT602240_OBJECT_SIZE,
object_buf);
}
static struct qt602240_object *
qt602240_get_object(struct qt602240_data *data, u8 type)
{
struct qt602240_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_err(&data->client->dev, "Invalid object type\n");
return NULL;
}
static int qt602240_read_message(struct qt602240_data *data,
struct qt602240_message *message)
{
struct qt602240_object *object;
u16 reg;
object = qt602240_get_object(data, QT602240_GEN_MESSAGE);
if (!object)
return -EINVAL;
reg = object->start_address;
return __qt602240_read_reg(data->client, reg,
sizeof(struct qt602240_message), message);
}
static int qt602240_read_object(struct qt602240_data *data,
u8 type, u8 offset, u8 *val)
{
struct qt602240_object *object;
u16 reg;
object = qt602240_get_object(data, type);
if (!object)
return -EINVAL;
reg = object->start_address;
return __qt602240_read_reg(data->client, reg + offset, 1, val);
}
static int qt602240_write_object(struct qt602240_data *data,
u8 type, u8 offset, u8 val)
{
struct qt602240_object *object;
u16 reg;
object = qt602240_get_object(data, type);
if (!object)
return -EINVAL;
reg = object->start_address;
return qt602240_write_reg(data->client, reg + offset, val);
}
static void qt602240_input_report(struct qt602240_data *data, int single_id)
{
struct qt602240_finger *finger = data->finger;
struct input_dev *input_dev = data->input_dev;
int status = finger[single_id].status;
int finger_num = 0;
int id;
for (id = 0; id < QT602240_MAX_FINGER; id++) {
if (!finger[id].status)
continue;
input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR,
finger[id].status != QT602240_RELEASE ?
finger[id].area : 0);
input_report_abs(input_dev, ABS_MT_POSITION_X,
finger[id].x);
input_report_abs(input_dev, ABS_MT_POSITION_Y,
finger[id].y);
input_mt_sync(input_dev);
if (finger[id].status == QT602240_RELEASE)
finger[id].status = 0;
else
finger_num++;
}
input_report_key(input_dev, BTN_TOUCH, finger_num > 0);
if (status != QT602240_RELEASE) {
input_report_abs(input_dev, ABS_X, finger[single_id].x);
input_report_abs(input_dev, ABS_Y, finger[single_id].y);
}
input_sync(input_dev);
}
static void qt602240_input_touchevent(struct qt602240_data *data,
struct qt602240_message *message, int id)
{
struct qt602240_finger *finger = data->finger;
struct device *dev = &data->client->dev;
u8 status = message->message[0];
int x;
int y;
int area;
/* Check the touch is present on the screen */
if (!(status & QT602240_DETECT)) {
if (status & QT602240_RELEASE) {
dev_dbg(dev, "[%d] released\n", id);
finger[id].status = QT602240_RELEASE;
qt602240_input_report(data, id);
}
return;
}
/* Check only AMP detection */
if (!(status & (QT602240_PRESS | QT602240_MOVE)))
return;
x = (message->message[1] << 2) | ((message->message[3] & ~0x3f) >> 6);
y = (message->message[2] << 2) | ((message->message[3] & ~0xf3) >> 2);
area = message->message[4];
dev_dbg(dev, "[%d] %s x: %d, y: %d, area: %d\n", id,
status & QT602240_MOVE ? "moved" : "pressed",
x, y, area);
finger[id].status = status & QT602240_MOVE ?
QT602240_MOVE : QT602240_PRESS;
finger[id].x = x;
finger[id].y = y;
finger[id].area = area;
qt602240_input_report(data, id);
}
static irqreturn_t qt602240_interrupt(int irq, void *dev_id)
{
struct qt602240_data *data = dev_id;
struct qt602240_message message;
struct qt602240_object *object;
struct device *dev = &data->client->dev;
int id;
u8 reportid;
u8 max_reportid;
u8 min_reportid;
do {
if (qt602240_read_message(data, &message)) {
dev_err(dev, "Failed to read message\n");
goto end;
}
reportid = message.reportid;
/* whether reportid is thing of QT602240_TOUCH_MULTI */
object = qt602240_get_object(data, QT602240_TOUCH_MULTI);
if (!object)
goto end;
max_reportid = object->max_reportid;
min_reportid = max_reportid - object->num_report_ids + 1;
id = reportid - min_reportid;
if (reportid >= min_reportid && reportid <= max_reportid)
qt602240_input_touchevent(data, &message, id);
else
qt602240_dump_message(dev, &message);
} while (reportid != 0xff);
end:
return IRQ_HANDLED;
}
static int qt602240_check_reg_init(struct qt602240_data *data)
{
struct qt602240_object *object;
struct device *dev = &data->client->dev;
int index = 0;
int i, j;
u8 version = data->info.version;
u8 *init_vals;
switch (version) {
case QT602240_VER_20:
init_vals = (u8 *)init_vals_ver_20;
break;
case QT602240_VER_21:
init_vals = (u8 *)init_vals_ver_21;
break;
case QT602240_VER_22:
init_vals = (u8 *)init_vals_ver_22;
break;
default:
dev_err(dev, "Firmware version %d doesn't support\n", version);
return -EINVAL;
}
for (i = 0; i < data->info.object_num; i++) {
object = data->object_table + i;
if (!qt602240_object_writable(object->type))
continue;
for (j = 0; j < object->size + 1; j++)
qt602240_write_object(data, object->type, j,
init_vals[index + j]);
index += object->size + 1;
}
return 0;
}
static int qt602240_check_matrix_size(struct qt602240_data *data)
{
const struct qt602240_platform_data *pdata = data->pdata;
struct device *dev = &data->client->dev;
int mode = -1;
int error;
u8 val;
dev_dbg(dev, "Number of X lines: %d\n", pdata->x_line);
dev_dbg(dev, "Number of Y lines: %d\n", pdata->y_line);
switch (pdata->x_line) {
case 0 ... 15:
if (pdata->y_line <= 14)
mode = 0;
break;
case 16:
if (pdata->y_line <= 12)
mode = 1;
if (pdata->y_line == 13 || pdata->y_line == 14)
mode = 0;
break;
case 17:
if (pdata->y_line <= 11)
mode = 2;
if (pdata->y_line == 12 || pdata->y_line == 13)
mode = 1;
break;
case 18:
if (pdata->y_line <= 10)
mode = 3;
if (pdata->y_line == 11 || pdata->y_line == 12)
mode = 2;
break;
case 19:
if (pdata->y_line <= 9)
mode = 4;
if (pdata->y_line == 10 || pdata->y_line == 11)
mode = 3;
break;
case 20:
mode = 4;
}
if (mode < 0) {
dev_err(dev, "Invalid X/Y lines\n");
return -EINVAL;
}
error = qt602240_read_object(data, QT602240_SPT_CTECONFIG,
QT602240_CTE_MODE, &val);
if (error)
return error;
if (mode == val)
return 0;
/* Change the CTE configuration */
qt602240_write_object(data, QT602240_SPT_CTECONFIG,
QT602240_CTE_CTRL, 1);
qt602240_write_object(data, QT602240_SPT_CTECONFIG,
QT602240_CTE_MODE, mode);
qt602240_write_object(data, QT602240_SPT_CTECONFIG,
QT602240_CTE_CTRL, 0);
return 0;
}
static int qt602240_make_highchg(struct qt602240_data *data)
{
struct device *dev = &data->client->dev;
int count = 10;
int error;
u8 val;
/* Read dummy message to make high CHG pin */
do {
error = qt602240_read_object(data, QT602240_GEN_MESSAGE, 0, &val);
if (error)
return error;
} while ((val != 0xff) && --count);
if (!count) {
dev_err(dev, "CHG pin isn't cleared\n");
return -EBUSY;
}
return 0;
}
static void qt602240_handle_pdata(struct qt602240_data *data)
{
const struct qt602240_platform_data *pdata = data->pdata;
u8 voltage;
/* Set touchscreen lines */
qt602240_write_object(data, QT602240_TOUCH_MULTI, QT602240_TOUCH_XSIZE,
pdata->x_line);
qt602240_write_object(data, QT602240_TOUCH_MULTI, QT602240_TOUCH_YSIZE,
pdata->y_line);
/* Set touchscreen orient */
qt602240_write_object(data, QT602240_TOUCH_MULTI, QT602240_TOUCH_ORIENT,
pdata->orient);
/* Set touchscreen burst length */
qt602240_write_object(data, QT602240_TOUCH_MULTI,
QT602240_TOUCH_BLEN, pdata->blen);
/* Set touchscreen threshold */
qt602240_write_object(data, QT602240_TOUCH_MULTI,
QT602240_TOUCH_TCHTHR, pdata->threshold);
/* Set touchscreen resolution */
qt602240_write_object(data, QT602240_TOUCH_MULTI,
QT602240_TOUCH_XRANGE_LSB, (pdata->x_size - 1) & 0xff);
qt602240_write_object(data, QT602240_TOUCH_MULTI,
QT602240_TOUCH_XRANGE_MSB, (pdata->x_size - 1) >> 8);
qt602240_write_object(data, QT602240_TOUCH_MULTI,
QT602240_TOUCH_YRANGE_LSB, (pdata->y_size - 1) & 0xff);
qt602240_write_object(data, QT602240_TOUCH_MULTI,
QT602240_TOUCH_YRANGE_MSB, (pdata->y_size - 1) >> 8);
/* Set touchscreen voltage */
if (data->info.version >= QT602240_VER_21 && pdata->voltage) {
if (pdata->voltage < QT602240_VOLTAGE_DEFAULT) {
voltage = (QT602240_VOLTAGE_DEFAULT - pdata->voltage) /
QT602240_VOLTAGE_STEP;
voltage = 0xff - voltage + 1;
} else
voltage = (pdata->voltage - QT602240_VOLTAGE_DEFAULT) /
QT602240_VOLTAGE_STEP;
qt602240_write_object(data, QT602240_SPT_CTECONFIG,
QT602240_CTE_VOLTAGE, voltage);
}
}
static int qt602240_get_info(struct qt602240_data *data)
{
struct i2c_client *client = data->client;
struct qt602240_info *info = &data->info;
int error;
u8 val;
error = qt602240_read_reg(client, QT602240_FAMILY_ID, &val);
if (error)
return error;
info->family_id = val;
error = qt602240_read_reg(client, QT602240_VARIANT_ID, &val);
if (error)
return error;
info->variant_id = val;
error = qt602240_read_reg(client, QT602240_VERSION, &val);
if (error)
return error;
info->version = val;
error = qt602240_read_reg(client, QT602240_BUILD, &val);
if (error)
return error;
info->build = val;
error = qt602240_read_reg(client, QT602240_OBJECT_NUM, &val);
if (error)
return error;
info->object_num = val;
return 0;
}
static int qt602240_get_object_table(struct qt602240_data *data)
{
int error;
int i;
u16 reg;
u8 reportid = 0;
u8 buf[QT602240_OBJECT_SIZE];
for (i = 0; i < data->info.object_num; i++) {
struct qt602240_object *object = data->object_table + i;
reg = QT602240_OBJECT_START + QT602240_OBJECT_SIZE * i;
error = qt602240_read_object_table(data->client, reg, buf);
if (error)
return error;
object->type = buf[0];
object->start_address = (buf[2] << 8) | buf[1];
object->size = buf[3];
object->instances = buf[4];
object->num_report_ids = buf[5];
if (object->num_report_ids) {
reportid += object->num_report_ids *
(object->instances + 1);
object->max_reportid = reportid;
}
}
return 0;
}
static int qt602240_initialize(struct qt602240_data *data)
{
struct i2c_client *client = data->client;
struct qt602240_info *info = &data->info;
int error;
u8 val;
error = qt602240_get_info(data);
if (error)
return error;
data->object_table = kcalloc(info->object_num,
sizeof(struct qt602240_data),
GFP_KERNEL);
if (!data->object_table) {
dev_err(&client->dev, "Failed to allocate memory\n");
return -ENOMEM;
}
/* Get object table information */
error = qt602240_get_object_table(data);
if (error)
return error;
/* Check register init values */
error = qt602240_check_reg_init(data);
if (error)
return error;
/* Check X/Y matrix size */
error = qt602240_check_matrix_size(data);
if (error)
return error;
error = qt602240_make_highchg(data);
if (error)
return error;
qt602240_handle_pdata(data);
/* Backup to memory */
qt602240_write_object(data, QT602240_GEN_COMMAND,
QT602240_COMMAND_BACKUPNV,
QT602240_BACKUP_VALUE);
msleep(QT602240_BACKUP_TIME);
/* Soft reset */
qt602240_write_object(data, QT602240_GEN_COMMAND,
QT602240_COMMAND_RESET, 1);
msleep(QT602240_RESET_TIME);
/* Update matrix size at info struct */
error = qt602240_read_reg(client, QT602240_MATRIX_X_SIZE, &val);
if (error)
return error;
info->matrix_xsize = val;
error = qt602240_read_reg(client, QT602240_MATRIX_Y_SIZE, &val);
if (error)
return error;
info->matrix_ysize = val;
dev_info(&client->dev,
"Family ID: %d Variant ID: %d Version: %d Build: %d\n",
info->family_id, info->variant_id, info->version,
info->build);
dev_info(&client->dev,
"Matrix X Size: %d Matrix Y Size: %d Object Num: %d\n",
info->matrix_xsize, info->matrix_ysize,
info->object_num);
return 0;
}
static ssize_t qt602240_object_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qt602240_data *data = dev_get_drvdata(dev);
struct qt602240_object *object;
int count = 0;
int i, j;
int error;
u8 val;
for (i = 0; i < data->info.object_num; i++) {
object = data->object_table + i;
count += sprintf(buf + count,
"Object Table Element %d(Type %d)\n",
i + 1, object->type);
if (!qt602240_object_readable(object->type)) {
count += sprintf(buf + count, "\n");
continue;
}
for (j = 0; j < object->size + 1; j++) {
error = qt602240_read_object(data,
object->type, j, &val);
if (error)
return error;
count += sprintf(buf + count,
" Byte %d: 0x%x (%d)\n", j, val, val);
}
count += sprintf(buf + count, "\n");
}
return count;
}
static int qt602240_load_fw(struct device *dev, const char *fn)
{
struct qt602240_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
const struct firmware *fw = NULL;
unsigned int frame_size;
unsigned int pos = 0;
int ret;
ret = request_firmware(&fw, fn, dev);
if (ret) {
dev_err(dev, "Unable to open firmware %s\n", fn);
return ret;
}
/* Change to the bootloader mode */
qt602240_write_object(data, QT602240_GEN_COMMAND,
QT602240_COMMAND_RESET, QT602240_BOOT_VALUE);
msleep(QT602240_RESET_TIME);
/* Change to slave address of bootloader */
if (client->addr == QT602240_APP_LOW)
client->addr = QT602240_BOOT_LOW;
else
client->addr = QT602240_BOOT_HIGH;
ret = qt602240_check_bootloader(client, QT602240_WAITING_BOOTLOAD_CMD);
if (ret)
goto out;
/* Unlock bootloader */
qt602240_unlock_bootloader(client);
while (pos < fw->size) {
ret = qt602240_check_bootloader(client,
QT602240_WAITING_FRAME_DATA);
if (ret)
goto out;
frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
/* We should add 2 at frame size as the the firmware data is not
* included the CRC bytes.
*/
frame_size += 2;
/* Write one frame to device */
qt602240_fw_write(client, fw->data + pos, frame_size);
ret = qt602240_check_bootloader(client,
QT602240_FRAME_CRC_PASS);
if (ret)
goto out;
pos += frame_size;
dev_dbg(dev, "Updated %d bytes / %zd bytes\n", pos, fw->size);
}
out:
release_firmware(fw);
/* Change to slave address of application */
if (client->addr == QT602240_BOOT_LOW)
client->addr = QT602240_APP_LOW;
else
client->addr = QT602240_APP_HIGH;
return ret;
}
static ssize_t qt602240_update_fw_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct qt602240_data *data = dev_get_drvdata(dev);
unsigned int version;
int error;
if (sscanf(buf, "%u", &version) != 1) {
dev_err(dev, "Invalid values\n");
return -EINVAL;
}
if (data->info.version < QT602240_VER_21 || version < QT602240_VER_21) {
dev_err(dev, "FW update supported starting with version 21\n");
return -EINVAL;
}
disable_irq(data->irq);
error = qt602240_load_fw(dev, QT602240_FW_NAME);
if (error) {
dev_err(dev, "The firmware update failed(%d)\n", error);
count = error;
} else {
dev_dbg(dev, "The firmware update succeeded\n");
/* Wait for reset */
msleep(QT602240_FWRESET_TIME);
kfree(data->object_table);
data->object_table = NULL;
qt602240_initialize(data);
}
enable_irq(data->irq);
return count;
}
static DEVICE_ATTR(object, 0444, qt602240_object_show, NULL);
static DEVICE_ATTR(update_fw, 0664, NULL, qt602240_update_fw_store);
static struct attribute *qt602240_attrs[] = {
&dev_attr_object.attr,
&dev_attr_update_fw.attr,
NULL
};
static const struct attribute_group qt602240_attr_group = {
.attrs = qt602240_attrs,
};
static void qt602240_start(struct qt602240_data *data)
{
/* Touch enable */
qt602240_write_object(data,
QT602240_TOUCH_MULTI, QT602240_TOUCH_CTRL, 0x83);
}
static void qt602240_stop(struct qt602240_data *data)
{
/* Touch disable */
qt602240_write_object(data,
QT602240_TOUCH_MULTI, QT602240_TOUCH_CTRL, 0);
}
static int qt602240_input_open(struct input_dev *dev)
{
struct qt602240_data *data = input_get_drvdata(dev);
qt602240_start(data);
return 0;
}
static void qt602240_input_close(struct input_dev *dev)
{
struct qt602240_data *data = input_get_drvdata(dev);
qt602240_stop(data);
}
static int __devinit qt602240_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct qt602240_data *data;
struct input_dev *input_dev;
int error;
if (!client->dev.platform_data)
return -EINVAL;
data = kzalloc(sizeof(struct qt602240_data), GFP_KERNEL);
input_dev = input_allocate_device();
if (!data || !input_dev) {
dev_err(&client->dev, "Failed to allocate memory\n");
error = -ENOMEM;
goto err_free_mem;
}
input_dev->name = "AT42QT602240/ATMXT224 Touchscreen";
input_dev->id.bustype = BUS_I2C;
input_dev->dev.parent = &client->dev;
input_dev->open = qt602240_input_open;
input_dev->close = qt602240_input_close;
__set_bit(EV_ABS, input_dev->evbit);
__set_bit(EV_KEY, input_dev->evbit);
__set_bit(BTN_TOUCH, input_dev->keybit);
/* For single touch */
input_set_abs_params(input_dev, ABS_X,
0, QT602240_MAX_XC, 0, 0);
input_set_abs_params(input_dev, ABS_Y,
0, QT602240_MAX_YC, 0, 0);
/* For multi touch */
input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
0, QT602240_MAX_AREA, 0, 0);
input_set_abs_params(input_dev, ABS_MT_POSITION_X,
0, QT602240_MAX_XC, 0, 0);
input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
0, QT602240_MAX_YC, 0, 0);
input_set_drvdata(input_dev, data);
data->client = client;
data->input_dev = input_dev;
data->pdata = client->dev.platform_data;
data->irq = client->irq;
i2c_set_clientdata(client, data);
error = qt602240_initialize(data);
if (error)
goto err_free_object;
error = request_threaded_irq(client->irq, NULL, qt602240_interrupt,
IRQF_TRIGGER_FALLING, client->dev.driver->name, data);
if (error) {
dev_err(&client->dev, "Failed to register interrupt\n");
goto err_free_object;
}
error = input_register_device(input_dev);
if (error)
goto err_free_irq;
error = sysfs_create_group(&client->dev.kobj, &qt602240_attr_group);
if (error)
goto err_unregister_device;
return 0;
err_unregister_device:
input_unregister_device(input_dev);
input_dev = NULL;
err_free_irq:
free_irq(client->irq, data);
err_free_object:
kfree(data->object_table);
err_free_mem:
input_free_device(input_dev);
kfree(data);
return error;
}
static int __devexit qt602240_remove(struct i2c_client *client)
{
struct qt602240_data *data = i2c_get_clientdata(client);
sysfs_remove_group(&client->dev.kobj, &qt602240_attr_group);
free_irq(data->irq, data);
input_unregister_device(data->input_dev);
kfree(data->object_table);
kfree(data);
return 0;
}
#ifdef CONFIG_PM
static int qt602240_suspend(struct i2c_client *client, pm_message_t mesg)
{
struct qt602240_data *data = i2c_get_clientdata(client);
struct input_dev *input_dev = data->input_dev;
mutex_lock(&input_dev->mutex);
if (input_dev->users)
qt602240_stop(data);
mutex_unlock(&input_dev->mutex);
return 0;
}
static int qt602240_resume(struct i2c_client *client)
{
struct qt602240_data *data = i2c_get_clientdata(client);
struct input_dev *input_dev = data->input_dev;
/* Soft reset */
qt602240_write_object(data, QT602240_GEN_COMMAND,
QT602240_COMMAND_RESET, 1);
msleep(QT602240_RESET_TIME);
mutex_lock(&input_dev->mutex);
if (input_dev->users)
qt602240_start(data);
mutex_unlock(&input_dev->mutex);
return 0;
}
#else
#define qt602240_suspend NULL
#define qt602240_resume NULL
#endif
static const struct i2c_device_id qt602240_id[] = {
{ "qt602240_ts", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, qt602240_id);
static struct i2c_driver qt602240_driver = {
.driver = {
.name = "qt602240_ts",
.owner = THIS_MODULE,
},
.probe = qt602240_probe,
.remove = __devexit_p(qt602240_remove),
.suspend = qt602240_suspend,
.resume = qt602240_resume,
.id_table = qt602240_id,
};
static int __init qt602240_init(void)
{
return i2c_add_driver(&qt602240_driver);
}
static void __exit qt602240_exit(void)
{
i2c_del_driver(&qt602240_driver);
}
module_init(qt602240_init);
module_exit(qt602240_exit);
/* Module information */
MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
MODULE_DESCRIPTION("AT42QT602240/ATMXT224 Touchscreen driver");
MODULE_LICENSE("GPL");
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