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android / kernel / tegra / b445e5296764d18861a6450f6851f25b9ca59dee / . / drivers / input / touchscreen / atmel_mxt_ts.c
blob: e676fa96ddade22ebdf0c5b860148272e0a900e2 [file] [log] [blame]
/*
* Atmel maXTouch Touchscreen driver
*
* Copyright (C) 2010 Samsung Electronics Co.Ltd
* Copyright (C) 2011 Atmel Corporation
* Copyright (C) 2011-2013 NVIDIA Corporation
* 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/atmel_mxt_ts.h>
#include <linux/input/mt.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/regulator/consumer.h>
#define CREATE_TRACE_POINTS
#include <trace/events/touchscreen_atmel.h>
/* Version */
#define MXT_VER_20 20
#define MXT_VER_21 21
#define MXT_VER_22 22
/* Firmware files */
#define MXT_FW_NAME "maxtouch.fw"
#define MXT_CFG_MAGIC "OBP_RAW V1"
/* Registers */
#define MXT_FAMILY_ID 0x00
#define MXT_VARIANT_ID 0x01
#define MXT_VERSION 0x02
#define MXT_BUILD 0x03
#define MXT_MATRIX_X_SIZE 0x04
#define MXT_MATRIX_Y_SIZE 0x05
#define MXT_OBJECT_NUM 0x06
#define MXT_OBJECT_START 0x07
#define MXT_OBJECT_SIZE 6
#define MXT_MAX_BLOCK_WRITE 256
/* Object types */
#define MXT_DEBUG_DIAGNOSTIC_T37 37
#define MXT_GEN_MESSAGE_T5 5
#define MXT_GEN_COMMAND_T6 6
#define MXT_GEN_POWER_T7 7
#define MXT_GEN_ACQUIRE_T8 8
#define MXT_GEN_DATASOURCE_T53 53
#define MXT_TOUCH_MULTI_T9 9
#define MXT_TOUCH_KEYARRAY_T15 15
#define MXT_TOUCH_PROXIMITY_T23 23
#define MXT_TOUCH_PROXKEY_T52 52
#define MXT_PROCI_GRIPFACE_T20 20
#define MXT_PROCG_NOISE_T22 22
#define MXT_PROCI_ACTIVE_STYLUS_T63 63
#define MXT_PROCI_ONETOUCH_T24 24
#define MXT_PROCI_TWOTOUCH_T27 27
#define MXT_PROCI_GRIP_T40 40
#define MXT_PROCI_PALM_T41 41
#define MXT_PROCI_TOUCHSUPPRESSION_T42 42
#define MXT_PROCI_STYLUS_T47 47
#define MXT_PROCG_NOISESUPPRESSION_T48 48
#define MXT_SPT_COMMSCONFIG_T18 18
#define MXT_SPT_GPIOPWM_T19 19
#define MXT_SPT_SELFTEST_T25 25
#define MXT_SPT_CTECONFIG_T28 28
#define MXT_SPT_USERDATA_T38 38
#define MXT_SPT_DIGITIZER_T43 43
#define MXT_SPT_MESSAGECOUNT_T44 44
#define MXT_SPT_CTECONFIG_T46 46
#define MXT_SPT_NOISESUPPRESSION_T48 48
/* MXT_GEN_MESSAGE_T5 object */
#define MXT_RPTID_NOMSG 0xff
/* MXT_GEN_COMMAND_T6 field */
#define MXT_COMMAND_RESET 0
#define MXT_COMMAND_BACKUPNV 1
#define MXT_COMMAND_CALIBRATE 2
#define MXT_COMMAND_REPORTALL 3
#define MXT_COMMAND_DIAGNOSTIC 5
/* MXT_GEN_POWER_T7 field */
#define MXT_POWER_IDLEACQINT 0
#define MXT_POWER_ACTVACQINT 1
#define MXT_POWER_ACTV2IDLETO 2
#define MXT_POWER_CFG_RUN 0
#define MXT_POWER_CFG_DEEPSLEEP 1
/* MXT_GEN_ACQUIRE_T8 field */
#define MXT_ACQUIRE_CHRGTIME 0
#define MXT_ACQUIRE_TCHDRIFT 2
#define MXT_ACQUIRE_DRIFTST 3
#define MXT_ACQUIRE_TCHAUTOCAL 4
#define MXT_ACQUIRE_SYNC 5
#define MXT_ACQUIRE_ATCHCALST 6
#define MXT_ACQUIRE_ATCHCALSTHR 7
/* MXT_TOUCH_MULTI_T9 field */
#define MXT_TOUCH_CTRL 0
#define MXT_TOUCH_XORIGIN 1
#define MXT_TOUCH_YORIGIN 2
#define MXT_TOUCH_XSIZE 3
#define MXT_TOUCH_YSIZE 4
#define MXT_TOUCH_BLEN 6
#define MXT_TOUCH_TCHTHR 7
#define MXT_TOUCH_TCHDI 8
#define MXT_TOUCH_ORIENT 9
#define MXT_TOUCH_MOVHYSTI 11
#define MXT_TOUCH_MOVHYSTN 12
#define MXT_TOUCH_NUMTOUCH 14
#define MXT_TOUCH_MRGHYST 15
#define MXT_TOUCH_MRGTHR 16
#define MXT_TOUCH_AMPHYST 17
#define MXT_TOUCH_XRANGE_LSB 18
#define MXT_TOUCH_XRANGE_MSB 19
#define MXT_TOUCH_YRANGE_LSB 20
#define MXT_TOUCH_YRANGE_MSB 21
#define MXT_TOUCH_XLOCLIP 22
#define MXT_TOUCH_XHICLIP 23
#define MXT_TOUCH_YLOCLIP 24
#define MXT_TOUCH_YHICLIP 25
#define MXT_TOUCH_XEDGECTRL 26
#define MXT_TOUCH_XEDGEDIST 27
#define MXT_TOUCH_YEDGECTRL 28
#define MXT_TOUCH_YEDGEDIST 29
#define MXT_TOUCH_JUMPLIMIT 30
/* MXT_PROCI_GRIPFACE_T20 field */
#define MXT_GRIPFACE_CTRL 0
#define MXT_GRIPFACE_XLOGRIP 1
#define MXT_GRIPFACE_XHIGRIP 2
#define MXT_GRIPFACE_YLOGRIP 3
#define MXT_GRIPFACE_YHIGRIP 4
#define MXT_GRIPFACE_MAXTCHS 5
#define MXT_GRIPFACE_SZTHR1 7
#define MXT_GRIPFACE_SZTHR2 8
#define MXT_GRIPFACE_SHPTHR1 9
#define MXT_GRIPFACE_SHPTHR2 10
#define MXT_GRIPFACE_SUPEXTTO 11
/* MXT_PROCI_NOISE field */
#define MXT_NOISE_CTRL 0
#define MXT_NOISE_OUTFLEN 1
#define MXT_NOISE_GCAFUL_LSB 3
#define MXT_NOISE_GCAFUL_MSB 4
#define MXT_NOISE_GCAFLL_LSB 5
#define MXT_NOISE_GCAFLL_MSB 6
#define MXT_NOISE_ACTVGCAFVALID 7
#define MXT_NOISE_NOISETHR 8
#define MXT_NOISE_FREQHOPSCALE 10
#define MXT_NOISE_FREQ0 11
#define MXT_NOISE_FREQ1 12
#define MXT_NOISE_FREQ2 13
#define MXT_NOISE_FREQ3 14
#define MXT_NOISE_FREQ4 15
#define MXT_NOISE_IDLEGCAFVALID 16
/* MXT_SPT_COMMSCONFIG_T18 */
#define MXT_COMMS_CTRL 0
#define MXT_COMMS_CMD 1
/* MXT_SPT_CTECONFIG_T28 field */
#define MXT_CTE_CTRL 0
#define MXT_CTE_CMD 1
#define MXT_CTE_MODE 2
#define MXT_CTE_IDLEGCAFDEPTH 3
#define MXT_CTE_ACTVGCAFDEPTH 4
#define MXT_CTE_VOLTAGE 5
#define MXT_VOLTAGE_DEFAULT 2700000
#define MXT_VOLTAGE_STEP 10000
/* Defines for Suspend/Resume */
#define MXT_SUSPEND_STATIC 0
#define MXT_SUSPEND_DYNAMIC 1
#define MXT_T7_IDLEACQ_DISABLE 0
#define MXT_T7_ACTVACQ_DISABLE 0
#define MXT_T7_ACTV2IDLE_DISABLE 0
#define MXT_T9_DISABLE 0
#define MXT_T9_ENABLE 0x83
#define MXT_T22_DISABLE 0
/* Define for MXT_GEN_COMMAND_T6 */
#define MXT_BOOT_VALUE 0xa5
#define MXT_RESET_VALUE 0x01
#define MXT_BACKUP_VALUE 0x55
/* Define for MXT_PROCG_NOISESUPPRESSION_T42 */
#define MXT_T42_MSG_TCHSUP (1 << 0)
/* Delay times */
#define MXT_BACKUP_TIME 25 /* msec */
#define MXT_RESET_TIME 200 /* msec */
#define MXT_RESET_NOCHGREAD 400 /* msec */
#define MXT_FWRESET_TIME 1000 /* msec */
#define MXT_WAKEUP_TIME 25 /* msec */
/* Defines for MXT_SLOWSCAN_EXTENSIONS */
#define SLOSCAN_DISABLE 0 /* Disable slow scan */
#define SLOSCAN_ENABLE 1 /* Enable slow scan */
#define SLOSCAN_SET_ACTVACQINT 2 /* Set ACTV scan rate */
#define SLOSCAN_SET_IDLEACQINT 3 /* Set IDLE scan rate */
#define SLOSCAN_SET_ACTV2IDLETO 4 /* Set the ACTIVE to IDLE TimeOut */
/* Command to unlock bootloader */
#define MXT_UNLOCK_CMD_MSB 0xaa
#define MXT_UNLOCK_CMD_LSB 0xdc
/* Bootloader mode status */
#define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */
#define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */
#define MXT_FRAME_CRC_CHECK 0x02
#define MXT_FRAME_CRC_FAIL 0x03
#define MXT_FRAME_CRC_PASS 0x04
#define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */
#define MXT_BOOT_STATUS_MASK 0x3f
#define MXT_BOOT_EXTENDED_ID (1 << 5)
#define MXT_BOOT_ID_MASK 0x1f
/* Define for T6 status byte */
#define MXT_STATUS_RESET (1 << 7)
#define MXT_STATUS_OFL (1 << 6)
#define MXT_STATUS_SIGERR (1 << 5)
#define MXT_STATUS_CAL (1 << 4)
#define MXT_STATUS_CFGERR (1 << 3)
#define MXT_STATUS_COMSERR (1 << 2)
/* T9 Touch status */
#define MXT_T9_UNGRIP (1 << 0)
#define MXT_T9_SUPPRESS (1 << 1)
#define MXT_T9_AMP (1 << 2)
#define MXT_T9_VECTOR (1 << 3)
#define MXT_T9_MOVE (1 << 4)
#define MXT_T9_RELEASE (1 << 5)
#define MXT_T9_PRESS (1 << 6)
#define MXT_T9_DETECT (1 << 7)
/* Touch orient bits */
#define MXT_XY_SWITCH (1 << 0)
#define MXT_X_INVERT (1 << 1)
#define MXT_Y_INVERT (1 << 2)
/* T63 Stylus */
#define MXT_STYLUS_PRESS (1 << 0)
#define MXT_STYLUS_RELEASE (1 << 1)
#define MXT_STYLUS_MOVE (1 << 2)
#define MXT_STYLUS_SUPPRESS (1 << 3)
#define MXT_STYLUS_DETECT (1 << 4)
#define MXT_STYLUS_TIP (1 << 5)
#define MXT_STYLUS_ERASER (1 << 6)
#define MXT_STYLUS_BARREL (1 << 7)
#define MXT_STYLUS_PRESSURE_MASK 0x3F
/* T15 Key array */
int mxt_t15_keys[] = { };
static unsigned long mxt_t15_keystatus;
/* Touchscreen absolute values */
#define MXT_MAX_AREA 0xff
struct mxt_info {
u8 family_id;
u8 variant_id;
u8 version;
u8 build;
u8 matrix_xsize;
u8 matrix_ysize;
u8 object_num;
};
struct mxt_object {
u8 type;
u16 start_address;
u16 size;
u16 instances;
u8 num_report_ids;
/* to map object and message */
u8 min_reportid;
u8 max_reportid;
};
enum mxt_device_state { INIT, APPMODE, BOOTLOADER, FAILED, SHUTDOWN };
/* This structure is used to save/restore values during suspend/resume */
struct mxt_suspend {
u8 suspend_obj;
u8 suspend_reg;
u8 suspend_val;
u8 suspend_flags;
u8 restore_val;
};
/* Each client has this additional data */
struct mxt_data {
struct i2c_client *client;
struct input_dev *input_dev;
const struct mxt_platform_data *pdata;
enum mxt_device_state state;
struct mxt_object *object_table;
struct regulator *regulator_vdd;
struct regulator *regulator_avdd;
u16 mem_size;
struct mxt_info info;
unsigned int irq;
unsigned int max_x;
unsigned int max_y;
struct bin_attribute mem_access_attr;
bool debug_enabled;
bool driver_paused;
u8 bootloader_addr;
u8 actv_cycle_time;
u8 idle_cycle_time;
u8 actv2idle_timeout;
u8 is_stopped;
u8 max_reportid;
u32 config_crc;
u32 info_block_crc;
u8 num_touchids;
u8 num_stylusids;
u8 *msg_buf;
u8 last_message_count;
/* Slowscan parameters */
int slowscan_enabled;
u8 slowscan_actv_cycle_time;
u8 slowscan_idle_cycle_time;
u8 slowscan_actv2idle_timeout;
u8 slowscan_shad_actv_cycle_time;
u8 slowscan_shad_idle_cycle_time;
u8 slowscan_shad_actv2idle_timeout;
/* Cached parameters from object table */
u16 T5_address;
u8 T5_msg_size;
u8 T6_reportid;
u16 T7_address;
u8 T9_reportid_min;
u8 T9_reportid_max;
u8 T15_reportid_min;
u8 T15_reportid_max;
u8 T42_reportid_min;
u8 T42_reportid_max;
u16 T44_address;
u8 T48_reportid;
u8 T63_reportid_min;
u8 T63_reportid_max;
};
static struct mxt_suspend mxt_save[] = {
{MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL,
MXT_T9_DISABLE, MXT_SUSPEND_DYNAMIC, 0},
{MXT_PROCG_NOISE_T22, MXT_NOISE_CTRL,
MXT_T22_DISABLE, MXT_SUSPEND_DYNAMIC, 0},
{MXT_GEN_POWER_T7, MXT_POWER_IDLEACQINT,
MXT_T7_IDLEACQ_DISABLE, MXT_SUSPEND_DYNAMIC, 0},
{MXT_GEN_POWER_T7, MXT_POWER_ACTVACQINT,
MXT_T7_ACTVACQ_DISABLE, MXT_SUSPEND_DYNAMIC, 0},
{MXT_GEN_POWER_T7, MXT_POWER_ACTV2IDLETO,
MXT_T7_ACTV2IDLE_DISABLE, MXT_SUSPEND_DYNAMIC, 0}
};
/* I2C slave address pairs */
struct mxt_i2c_address_pair {
u8 bootloader;
u8 application;
};
static const struct mxt_i2c_address_pair mxt_i2c_addresses[] = {
#ifdef BOOTLOADER_1664_1188
{ 0x26, 0x4a },
{ 0x27, 0x4b },
#else
{ 0x24, 0x4a },
{ 0x25, 0x4b },
{ 0x26, 0x4c },
{ 0x27, 0x4d },
{ 0x34, 0x5a },
{ 0x35, 0x5b },
#endif
};
static int mxt_bootloader_read(struct mxt_data *data, u8 *val, unsigned int count)
{
int ret;
struct i2c_msg msg;
msg.addr = data->bootloader_addr;
msg.flags = data->client->flags & I2C_M_TEN;
msg.flags |= I2C_M_RD;
msg.len = count;
msg.buf = val;
ret = i2c_transfer(data->client->adapter, &msg, 1);
return (ret == 1) ? 0 : ret;
}
static int mxt_bootloader_write(struct mxt_data *data, const u8 * const val,
unsigned int count)
{
int ret;
struct i2c_msg msg;
msg.addr = data->bootloader_addr;
msg.flags = data->client->flags & I2C_M_TEN;
msg.len = count;
msg.buf = (u8 *)val;
ret = i2c_transfer(data->client->adapter, &msg, 1);
return (ret == 1) ? 0 : ret;
}
static int mxt_get_bootloader_address(struct mxt_data *data)
{
struct i2c_client *client = data->client;
int i;
for (i = 0; i < ARRAY_SIZE(mxt_i2c_addresses); i++) {
if (mxt_i2c_addresses[i].application == client->addr) {
data->bootloader_addr = mxt_i2c_addresses[i].bootloader;
dev_info(&client->dev, "Bootloader i2c addr: 0x%02x\n",
data->bootloader_addr);
return 0;
}
}
dev_err(&client->dev, "Address 0x%02x not found in address table\n",
client->addr);
return -EINVAL;
}
static int mxt_probe_bootloader(struct mxt_data *data)
{
struct device *dev = &data->client->dev;
int ret;
u8 val;
bool crc_failure;
ret = mxt_get_bootloader_address(data);
if (ret)
return ret;
ret = mxt_bootloader_read(data, &val, 1);
if (ret) {
dev_err(dev, "%s: i2c recv failed\n", __func__);
return -EIO;
}
/* Check app crc fail mode */
crc_failure = (val & ~MXT_BOOT_STATUS_MASK) == MXT_APP_CRC_FAIL;
dev_err(dev, "Detected bootloader, status:%02X%s\n",
val, crc_failure ? ", APP_CRC_FAIL" : "");
return 0;
}
static int mxt_wait_for_chg(struct mxt_data *data)
{
int timeout_counter = 0;
int count = 1E6;
if (data->pdata->read_chg == NULL) {
msleep(10);
return 0;
}
while ((timeout_counter++ <= count) && data->pdata->read_chg())
udelay(20);
if (timeout_counter > count) {
dev_err(&data->client->dev, "mxt_wait_for_chg() timeout!\n");
return -EIO;
}
return 0;
}
static u8 mxt_get_bootloader_version(struct mxt_data *data, u8 val)
{
struct device *dev = &data->client->dev;
u8 buf[3];
if (val & MXT_BOOT_EXTENDED_ID) {
if (mxt_bootloader_read(data, &buf[0], 3) != 0) {
dev_err(dev, "%s: i2c failure\n", __func__);
return -EIO;
}
dev_info(dev, "Bootloader ID:%d Version:%d\n", buf[1], buf[2]);
return buf[0];
} else {
dev_info(dev, "Bootloader ID:%d\n", val & MXT_BOOT_ID_MASK);
return val;
}
}
static int mxt_check_bootloader(struct mxt_data *data,
unsigned int state)
{
struct device *dev = &data->client->dev;
int ret;
u8 val;
recheck:
ret = mxt_bootloader_read(data, &val, 1);
if (ret) {
dev_err(dev, "%s: i2c recv failed, ret=%d\n",
__func__, ret);
return ret;
}
if (state == MXT_WAITING_BOOTLOAD_CMD) {
val = mxt_get_bootloader_version(data, val);
}
switch (state) {
case MXT_WAITING_BOOTLOAD_CMD:
val &= ~MXT_BOOT_STATUS_MASK;
break;
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) {
mxt_wait_for_chg(data);
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 mode state 0x%02X\n", val);
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) {
dev_err(&data->client->dev, "%s: i2c send failed, ret=%d\n",
__func__, ret);
return ret;
}
return 0;
}
static int mxt_read_reg(struct i2c_client *client,
u16 reg, u16 len, void *val)
{
struct device *dev = &client->dev;
struct i2c_msg xfer[2];
u8 buf[2];
int ret;
u8 retry = 0;
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;
retry_read:
ret = i2c_transfer(client->adapter, xfer, ARRAY_SIZE(xfer));
if (ret != ARRAY_SIZE(xfer)) {
if (!retry) {
dev_dbg(dev, "%s: i2c retry\n", __func__);
msleep(MXT_WAKEUP_TIME);
retry = 1;
goto retry_read;
} else {
dev_err(dev, "%s: i2c transfer failed (%d)\n",
__func__, ret);
return -EIO;
}
}
return 0;
}
static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
{
struct device *dev = &client->dev;
u8 retry = 0;
u8 buf[3];
buf[0] = reg & 0xff;
buf[1] = (reg >> 8) & 0xff;
buf[2] = val;
retry_write:
if (i2c_master_send(client, buf, 3) != 3) {
if (!retry) {
dev_dbg(dev, "%s: i2c retry\n", __func__);
msleep(MXT_WAKEUP_TIME);
retry = 1;
goto retry_write;
} else {
dev_err(dev, "%s: i2c send failed\n", __func__);
return -EIO;
}
}
return 0;
}
int mxt_write_block(struct i2c_client *client, u16 addr, u16 length, u8 *value)
{
int i;
struct {
__le16 le_addr;
u8 data[MXT_MAX_BLOCK_WRITE];
} i2c_block_transfer;
if (length > MXT_MAX_BLOCK_WRITE)
return -EINVAL;
memcpy(i2c_block_transfer.data, value, length);
i2c_block_transfer.le_addr = cpu_to_le16(addr);
i = i2c_master_send(client, (u8 *) &i2c_block_transfer, length + 2);
if (i == (length + 2))
return 0;
else
return -EIO;
}
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_err(&data->client->dev, "Invalid object type T%u\n", type);
return NULL;
}
static int mxt_read_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)
return -EINVAL;
reg = object->start_address;
return mxt_read_reg(data->client, reg + offset, 1, val);
}
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 >= object->size)
return -EINVAL;
if (offset >= object->size * object->instances) {
dev_err(&data->client->dev, "Tried to write outside object T%d"
" offset:%d, size:%d\n", type, offset, object->size);
return -EINVAL;
}
reg = object->start_address;
return mxt_write_reg(data->client, reg + offset, val);
}
static int mxt_soft_reset(struct mxt_data *data, u8 value)
{
int timeout_counter = 0;
struct device *dev = &data->client->dev;
dev_info(dev, "Resetting chip\n");
mxt_write_object(data, MXT_GEN_COMMAND_T6,
MXT_COMMAND_RESET, value);
if (data->pdata->read_chg == NULL) {
msleep(MXT_RESET_NOCHGREAD);
} else {
msleep(MXT_RESET_TIME);
timeout_counter = 0;
while ((timeout_counter++ <= 100) && data->pdata->read_chg())
msleep(20);
if (timeout_counter > 100) {
dev_err(dev, "No response after reset!\n");
return -EIO;
}
}
return 0;
}
static void mxt_proc_t6_messages(struct mxt_data *data, u8 *msg)
{
struct device *dev = &data->client->dev;
u32 crc;
u8 status = msg[1];
crc = msg[2] | (msg[3] << 8) | (msg[4] << 16);
if (crc != data->config_crc) {
data->config_crc = crc;
dev_dbg(dev, "T6 cfg crc 0x%06X\n", crc);
}
if (status)
dev_dbg(dev, "T6 status %s%s%s%s%s%s\n",
(status & MXT_STATUS_RESET) ? "RESET " : "",
(status & MXT_STATUS_OFL) ? "OFL " : "",
(status & MXT_STATUS_SIGERR) ? "SIGERR " : "",
(status & MXT_STATUS_CAL) ? "CAL " : "",
(status & MXT_STATUS_CFGERR) ? "CFGERR " : "",
(status & MXT_STATUS_COMSERR) ? "COMSERR " : "");
}
static void mxt_input_sync(struct mxt_data *data)
{
input_mt_report_pointer_emulation(data->input_dev, false);
input_sync(data->input_dev);
}
static void mxt_proc_t9_messages(struct mxt_data *data, u8 *message)
{
struct device *dev = &data->client->dev;
struct input_dev *input_dev = data->input_dev;
u8 status;
int x;
int y;
int area;
int amplitude;
u8 vector;
int id;
if (!input_dev || data->driver_paused)
return;
id = message[0] - data->T9_reportid_min;
if (id < 0 || id > data->num_touchids) {
dev_err(dev, "invalid touch id %d, total num touch is %d\n",
id, data->num_touchids);
return;
}
status = message[1];
x = (message[2] << 4) | ((message[4] >> 4) & 0xf);
y = (message[3] << 4) | ((message[4] & 0xf));
if (data->max_x < 1024)
x >>= 2;
if (data->max_y < 1024)
y >>= 2;
area = message[5];
amplitude = message[6];
vector = message[7];
dev_dbg(dev,
"[%d] %c%c%c%c%c%c%c%c x: %d y: %d area: %d amp: %d vector: %02X\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, vector);
input_mt_slot(input_dev, id);
if ((status & MXT_T9_DETECT) && (status & MXT_T9_RELEASE)) {
/* Touch in detect, just after being released, so
* get new touch tracking ID */
input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 0);
mxt_input_sync(data);
}
if (status & MXT_T9_DETECT) {
/* Touch in detect, report X/Y position */
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);
input_report_abs(input_dev, ABS_MT_ORIENTATION, vector);
} else {
/* Touch no longer in detect, so close out slot */
mxt_input_sync(data);
input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 0);
}
}
static void mxt_proc_t15_messages(struct mxt_data *data, u8 *msg)
{
struct input_dev *input_dev = data->input_dev;
struct device *dev = &data->client->dev;
u8 key;
bool curr_state, new_state;
bool sync = false;
unsigned long keystates = le32_to_cpu(msg[2]);
for (key = 0; key < ARRAY_SIZE(mxt_t15_keys); key++) {
curr_state = test_bit(key, &mxt_t15_keystatus);
new_state = test_bit(key, &keystates);
if (!curr_state && new_state) {
dev_dbg(dev, "T15 key press: %u\n", key);
__set_bit(key, &mxt_t15_keystatus);
input_event(input_dev, EV_KEY, mxt_t15_keys[key], 1);
sync = true;
} else if (curr_state && !new_state) {
dev_dbg(dev, "T15 key release: %u\n", key);
__clear_bit(key, &mxt_t15_keystatus);
input_event(input_dev, EV_KEY, mxt_t15_keys[key], 0);
sync = true;
}
}
if (sync)
input_sync(input_dev);
}
static void mxt_proc_t42_messages(struct mxt_data *data, u8 *msg)
{
struct device *dev = &data->client->dev;
u8 status = msg[1];
if (status & MXT_T42_MSG_TCHSUP)
dev_info(dev, "T42 suppress\n");
else
dev_info(dev, "T42 normal\n");
}
static int mxt_proc_t48_messages(struct mxt_data *data, u8 *msg)
{
struct device *dev = &data->client->dev;
u8 status, state;
status = msg[1];
state = msg[4];
dev_dbg(dev, "T48 state %d status %02X %s%s%s%s%s\n",
state,
status,
(status & 0x01) ? "FREQCHG " : "",
(status & 0x02) ? "APXCHG " : "",
(status & 0x04) ? "ALGOERR " : "",
(status & 0x10) ? "STATCHG " : "",
(status & 0x20) ? "NLVLCHG " : "");
return 0;
}
static void mxt_proc_t63_messages(struct mxt_data *data, u8 *msg)
{
struct device *dev = &data->client->dev;
struct input_dev *input_dev = data->input_dev;
u8 id;
u16 x, y;
u8 pressure;
if (!input_dev)
return;
/* stylus slots come after touch slots */
id = data->num_touchids + (msg[0] - data->T63_reportid_min);
if (id < 0 || id > (data->num_touchids + data->num_stylusids)) {
dev_err(dev, "invalid stylus id %d, max slot is %d\n",
id, data->num_stylusids);
return;
}
x = msg[3] | (msg[4] << 8);
y = msg[5] | (msg[6] << 8);
pressure = msg[7] & MXT_STYLUS_PRESSURE_MASK;
dev_dbg(dev,
"[%d] %c%c%c%c x: %d y: %d pressure: %d stylus:%c%c%c%c\n",
id,
(msg[1] & MXT_STYLUS_SUPPRESS) ? 'S' : '.',
(msg[1] & MXT_STYLUS_MOVE) ? 'M' : '.',
(msg[1] & MXT_STYLUS_RELEASE) ? 'R' : '.',
(msg[1] & MXT_STYLUS_PRESS) ? 'P' : '.',
x, y, pressure,
(msg[2] & MXT_STYLUS_BARREL) ? 'B' : '.',
(msg[2] & MXT_STYLUS_ERASER) ? 'E' : '.',
(msg[2] & MXT_STYLUS_TIP) ? 'T' : '.',
(msg[2] & MXT_STYLUS_DETECT) ? 'D' : '.');
input_mt_slot(input_dev, id);
if (msg[2] & MXT_STYLUS_DETECT) {
input_mt_report_slot_state(input_dev, MT_TOOL_PEN, 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, pressure);
} else {
input_mt_report_slot_state(input_dev, MT_TOOL_PEN, 0);
}
input_report_key(input_dev, BTN_STYLUS, (msg[2] & MXT_STYLUS_ERASER));
input_report_key(input_dev, BTN_STYLUS2, (msg[2] & MXT_STYLUS_BARREL));
mxt_input_sync(data);
}
static int mxt_proc_message(struct mxt_data *data, u8 *msg)
{
u8 report_id = msg[0];
if (report_id == MXT_RPTID_NOMSG)
return -1;
if (data->debug_enabled)
print_hex_dump(KERN_DEBUG, "MXT MSG:", DUMP_PREFIX_NONE, 16, 1,
msg, data->T5_msg_size, false);
if (report_id >= data->T9_reportid_min
&& report_id <= data->T9_reportid_max) {
mxt_proc_t9_messages(data, msg);
} else if (report_id >= data->T63_reportid_min
&& report_id <= data->T63_reportid_max) {
mxt_proc_t63_messages(data, msg);
} else if (report_id >= data->T15_reportid_min
&& report_id <= data->T15_reportid_max) {
mxt_proc_t15_messages(data, msg);
} else if (report_id == data->T6_reportid) {
mxt_proc_t6_messages(data, msg);
} else if (report_id == data->T48_reportid) {
mxt_proc_t48_messages(data, msg);
} else if (report_id >= data->T42_reportid_min
&& report_id <= data->T42_reportid_max) {
mxt_proc_t42_messages(data, msg);
}
return 0;
}
static int mxt_read_count_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 == 0)
num_valid++;
}
/* return number of messages read */
return num_valid;
}
static irqreturn_t mxt_read_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];
if (count == 0) {
dev_warn(dev, "Interrupt triggered but zero messages\n");
return IRQ_NONE;
} else if (count > data->max_reportid) {
dev_err(dev, "T44 count exceeded max report id\n");
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_count_messages(data, num_left);
if (ret < 0) {
mxt_input_sync(data);
return IRQ_NONE;
} else if (ret != num_left) {
dev_warn(dev, "Unexpected invalid message\n");
}
}
mxt_input_sync(data);
return IRQ_HANDLED;
}
static int mxt_read_t9_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_count_messages(data, count);
if (read < count)
return 0;
} while (--tries);
dev_err(dev, "CHG pin isn't cleared\n");
return -EBUSY;
}
static irqreturn_t mxt_read_t9_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_count_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;
/* read two at a time until an invalid message or else we reach
* reportid limit */
do {
num_handled = mxt_read_count_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;
mxt_input_sync(data);
return IRQ_HANDLED;
}
static irqreturn_t mxt_interrupt(int irq, void *dev_id)
{
struct mxt_data *data = dev_id;
trace_touchscreen_atmel_irq("Atmel_mxt_interrupt");
if (data->T44_address)
return mxt_read_messages_t44(data);
else
return mxt_read_t9_messages(data);
}
static void mxt_read_current_crc(struct mxt_data *data)
{
/* CRC has already been read */
if (data->config_crc > 0)
return;
mxt_write_object(data, MXT_GEN_COMMAND_T6,
MXT_COMMAND_REPORTALL, 1);
msleep(30);
/* Read all messages until invalid, this will update the
config crc stored in mxt_data */
mxt_read_t9_messages_until_invalid(data);
/* on failure, CRC is set to 0 and config will always be downloaded */
}
static u32 mxt_calculate_crc32(u32 crc, u8 firstbyte, u8 secondbyte)
{
static const unsigned int crcpoly = 0x80001B;
u32 result;
u16 data_word;
data_word = (u16)((u16)(secondbyte << 8) | firstbyte);
result = ((crc << 1) ^ (u32)data_word);
/* if bit 25 is set, XOR with crcpoly */
if (result & 0x1000000) {
result ^= crcpoly;
}
return result;
}
static u32 mxt_calculate_config_crc(u8 *base, off_t start_off, off_t end_off)
{
u8 *i;
u32 crc = 0;
u8 *last_val = base + end_off - 1;
if (end_off < start_off)
return -EINVAL;
for (i = base + start_off; i < last_val; i += 2) {
crc = mxt_calculate_crc32(crc, *i, *(i + 1));
}
/* if len is odd, fill the last byte with 0 */
if (i == last_val)
crc = mxt_calculate_crc32(crc, *i, 0);
/* Mask to 24-bit */
return (crc & 0x00FFFFFF);
}
int mxt_download_config(struct mxt_data *data, const char *fn)
{
struct device *dev = &data->client->dev;
struct mxt_info cfg_info;
struct mxt_object *object;
const struct firmware *cfg = NULL;
int ret;
int offset;
int data_pos;
int byte_offset;
int i;
int config_start_offset;
u32 info_crc, config_crc, calculated_crc;
u8 *config_mem;
size_t config_mem_size;
unsigned int type, instance, size;
u8 val;
u16 reg;
ret = request_firmware(&cfg, fn, dev);
if (ret < 0) {
dev_err(dev, "Failure to request config file %s\n", fn);
return 0;
}
mxt_read_current_crc(data);
if (strncmp(cfg->data, MXT_CFG_MAGIC, strlen(MXT_CFG_MAGIC))) {
dev_err(dev, "Unrecognised config file\n");
ret = -EINVAL;
goto release;
}
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");
ret = -EINVAL;
goto release;
}
data_pos += offset;
}
/* Read CRCs */
ret = sscanf(cfg->data + data_pos, "%x%n", &info_crc, &offset);
if (ret != 1) {
dev_err(dev, "Bad format\n");
ret = -EINVAL;
goto release;
}
data_pos += offset;
ret = sscanf(cfg->data + data_pos, "%x%n", &config_crc, &offset);
if (ret != 1) {
dev_err(dev, "Bad format\n");
ret = -EINVAL;
goto release;
}
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_block_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_info(dev, "Config CRC 0x%06X: OK\n", data->config_crc);
ret = 0;
goto release;
} else {
dev_info(dev, "Config CRC 0x%06X: does not match file 0x%06X\n",
data->config_crc, config_crc);
}
} else {
dev_warn(dev, "Info block CRC mismatch - attempting to apply config\n");
}
/* Malloc memory to store configuration */
config_start_offset = MXT_OBJECT_START
+ data->info.object_num * MXT_OBJECT_SIZE;
config_mem_size = data->mem_size - config_start_offset;
config_mem = kzalloc(config_mem_size, GFP_KERNEL);
if (!config_mem) {
dev_err(dev, "Failed to allocate memory\n");
ret = -ENOMEM;
goto release;
}
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\n");
ret = -EINVAL;
goto release_mem;
}
data_pos += offset;
object = mxt_get_object(data, type);
if (!object) {
ret = -EINVAL;
goto release_mem;
}
if (instance >= object->instances) {
dev_err(dev, "Object instances exceeded!\n");
ret = -EINVAL;
goto release_mem;
}
reg = object->start_address + object->size * instance;
if (size > object->size) {
/* 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 %u bytes in T%u!\n",
size - object->size, type);
size = object->size;
} else if (object->size > 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 %d byte(s) in T%d\n",
object->size - size, type);
}
for (i = 0; i < size; i++) {
ret = sscanf(cfg->data + data_pos, "%hhx%n",
&val,
&offset);
if (ret != 1) {
dev_err(dev, "Bad format\n");
ret = -EINVAL;
goto release_mem;
}
byte_offset = reg + i - config_start_offset;
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);
ret = -EINVAL;
goto release_mem;
}
data_pos += offset;
}
}
/* calculate crc of the received configs (not the raw config file) */
if (data->T7_address < config_start_offset) {
dev_err(dev, "Bad T7 address, T7addr = %x, config offset %x\n",
data->T7_address, config_start_offset);
ret = 0;
goto release_mem;
}
calculated_crc = mxt_calculate_config_crc(config_mem,
data->T7_address - config_start_offset, config_mem_size);
/* check the crc, calculated should same as what's in file */
if (config_crc > 0 && (config_crc != calculated_crc)) {
dev_err(dev, "CRC mismatch in config file, calculated=%06X, file=%06X\n",
calculated_crc, config_crc);
ret = 0;
goto release_mem;
}
/* Write configuration as blocks */
byte_offset = 0;
while (byte_offset < config_mem_size) {
size = config_mem_size - byte_offset;
if (size > MXT_MAX_BLOCK_WRITE)
size = MXT_MAX_BLOCK_WRITE;
ret = mxt_write_block(data->client,
config_start_offset + byte_offset,
size, config_mem + byte_offset);
if (ret != 0) {
dev_err(dev, "Config write error, ret=%d\n", ret);
goto release_mem;
}
byte_offset += size;
}
ret = 1; /* tell the caller config has been sent */
release_mem:
kfree(config_mem);
release:
release_firmware(cfg);
return ret;
}
static int mxt_set_power_cfg(struct mxt_data *data, u8 mode)
{
struct device *dev = &data->client->dev;
int error = 0;
int i, cnt;
if (data->state != APPMODE) {
dev_err(dev, "Not in APPMODE\n");
return -EINVAL;
}
switch (mode) {
case MXT_POWER_CFG_DEEPSLEEP:
/* Touch disable */
cnt = ARRAY_SIZE(mxt_save);
for (i = 0; i < cnt; i++) {
if (mxt_save[i].suspend_flags == MXT_SUSPEND_DYNAMIC)
error |= mxt_read_object(data,
mxt_save[i].suspend_obj,
mxt_save[i].suspend_reg,
&mxt_save[i].restore_val);
error |= mxt_write_object(data,
mxt_save[i].suspend_obj,
mxt_save[i].suspend_reg,
mxt_save[i].suspend_val);
}
break;
case MXT_POWER_CFG_RUN:
default:
/* Touch enable */
cnt = ARRAY_SIZE(mxt_save);
while (cnt--)
error |= mxt_write_object(data,
mxt_save[cnt].suspend_obj,
mxt_save[cnt].suspend_reg,
mxt_save[cnt].restore_val);
break;
}
if (error)
goto i2c_error;
data->is_stopped = (mode == MXT_POWER_CFG_DEEPSLEEP) ? 1 : 0;
return 0;
i2c_error:
dev_err(dev, "Failed to set power cfg\n");
return error;
}
static int mxt_read_power_cfg(struct mxt_data *data, u8 *actv_cycle_time,
u8 *idle_cycle_time, u8 *actv2idle_timeout)
{
int error;
error = mxt_read_object(data, MXT_GEN_POWER_T7,
MXT_POWER_ACTVACQINT,
actv_cycle_time);
if (error)
return error;
error = mxt_read_object(data, MXT_GEN_POWER_T7,
MXT_POWER_IDLEACQINT,
idle_cycle_time);
if (error)
return error;
error = mxt_read_object(data, MXT_GEN_POWER_T7,
MXT_POWER_ACTV2IDLETO,
actv2idle_timeout);
if (error)
return error;
return 0;
}
static int mxt_check_power_cfg_post_reset(struct mxt_data *data)
{
struct device *dev = &data->client->dev;
int error;
error = mxt_read_power_cfg(data, &data->actv_cycle_time,
&data->idle_cycle_time,
&data->actv2idle_timeout);
if (error)
return error;
/* Power config is zero, select free run */
if (data->actv_cycle_time == 0 || data->idle_cycle_time == 0) {
dev_dbg(dev, "Overriding power cfg to free run\n");
data->actv_cycle_time = 255;
data->idle_cycle_time = 255;
error = mxt_set_power_cfg(data, MXT_POWER_CFG_RUN);
if (error)
return error;
}
return 0;
}
static int mxt_probe_power_cfg(struct mxt_data *data)
{
int error;
data->slowscan_actv_cycle_time = 120; /* 120mS */
data->slowscan_idle_cycle_time = 10; /* 10mS */
data->slowscan_actv2idle_timeout = 100; /* 10 seconds */
error = mxt_read_power_cfg(data, &data->actv_cycle_time,
&data->idle_cycle_time,
&data->actv2idle_timeout);
if (error)
return error;
/* If in deep sleep mode, attempt reset */
if (data->actv_cycle_time == 0 || data->idle_cycle_time == 0) {
error = mxt_soft_reset(data, MXT_RESET_VALUE);
if (error)
return error;
error = mxt_check_power_cfg_post_reset(data);
if (error)
return error;
}
return 0;
}
static int mxt_check_reg_init(struct mxt_data *data)
{
struct device *dev = &data->client->dev;
int timeout_counter = 0;
int ret;
u8 command_register;
ret = mxt_download_config(data, data->pdata->mxt_cfg_name);
if (ret < 0)
return ret;
else if (ret == 0)
/* CRC matched, or no config file, or config parse failure
* - no need to reset */
return 0;
/* Backup to memory */
mxt_write_object(data, MXT_GEN_COMMAND_T6,
MXT_COMMAND_BACKUPNV,
MXT_BACKUP_VALUE);
msleep(MXT_BACKUP_TIME);
do {
ret = mxt_read_object(data, MXT_GEN_COMMAND_T6,
MXT_COMMAND_BACKUPNV,
&command_register);
if (ret)
return ret;
msleep(20);
} while ((command_register != 0) && (timeout_counter++ <= 100));
if (timeout_counter > 100) {
dev_err(dev, "No response after backup!\n");
return -EIO;
}
ret = mxt_soft_reset(data, MXT_RESET_VALUE);
if (ret)
return ret;
ret = mxt_check_power_cfg_post_reset(data);
if (ret)
return ret;
return 0;
}
static int mxt_read_info_block_crc(struct mxt_data *data)
{
int ret;
u16 offset;
u8 buf[3];
offset = MXT_OBJECT_START + MXT_OBJECT_SIZE * data->info.object_num;
ret = mxt_read_reg(data->client, offset, sizeof(buf), buf);
if (ret)
return ret;
data->info_block_crc = (buf[2] << 16) | (buf[1] << 8) | buf[0];
return 0;
}
static int mxt_get_object_table(struct mxt_data *data)
{
struct i2c_client *client = data->client;
struct device *dev = &data->client->dev;
int ret;
int i;
u16 end_address;
u8 reportid = 0;
u8 buf[data->info.object_num][MXT_OBJECT_SIZE];
data->mem_size = 0;
data->object_table = kcalloc(data->info.object_num,
sizeof(struct mxt_object), GFP_KERNEL);
if (!data->object_table) {
dev_err(dev, "Failed to allocate object table\n");
return -ENOMEM;
}
ret = mxt_read_reg(client, MXT_OBJECT_START, sizeof(buf), buf);
if (ret)
goto free_object_table;
for (i = 0; i < data->info.object_num; i++) {
struct mxt_object *object = data->object_table + i;
object->type = buf[i][0];
object->start_address = (buf[i][2] << 8) | buf[i][1];
object->size = buf[i][3] + 1;
object->instances = buf[i][4] + 1;
object->num_report_ids = buf[i][5];
if (object->num_report_ids) {
reportid += object->num_report_ids * object->instances;
object->max_reportid = reportid;
object->min_reportid = object->max_reportid -
object->instances * object->num_report_ids + 1;
}
end_address = object->start_address
+ object->size * object->instances - 1;
if (end_address >= data->mem_size)
data->mem_size = end_address + 1;
/* save data for objects used when processing interrupts */
switch (object->type) {
case MXT_TOUCH_MULTI_T9:
data->T9_reportid_max = object->max_reportid;
data->T9_reportid_min = object->min_reportid;
data->num_touchids = object->num_report_ids * object->instances;
break;
case MXT_GEN_COMMAND_T6:
data->T6_reportid = object->max_reportid;
break;
case MXT_GEN_MESSAGE_T5:
if (data->info.family_id == 0x80) {
/* On mXT224 must read and discard CRC byte
* otherwise DMA reads are misaligned */
data->T5_msg_size = object->size;
} else {
/* CRC not enabled, therefore don't read last byte */
data->T5_msg_size = object->size - 1;
}
data->T5_address = object->start_address;
break;
case MXT_GEN_POWER_T7:
data->T7_address = object->start_address;
break;
case MXT_TOUCH_KEYARRAY_T15:
data->T15_reportid_max = object->max_reportid;
data->T15_reportid_min = object->min_reportid;
break;
case MXT_PROCI_TOUCHSUPPRESSION_T42:
data->T42_reportid_max = object->max_reportid;
data->T42_reportid_min = object->min_reportid;
break;
case MXT_SPT_MESSAGECOUNT_T44:
data->T44_address = object->start_address;
break;
case MXT_SPT_NOISESUPPRESSION_T48:
data->T48_reportid = object->max_reportid;
break;
case MXT_PROCI_ACTIVE_STYLUS_T63:
data->T63_reportid_max = object->max_reportid;
data->T63_reportid_min = object->min_reportid;
data->num_stylusids =
object->num_report_ids * object->instances;
break;
}
dev_dbg(dev, "T%u, start:%u size:%u instances:%u "
"min_reportid:%u max_reportid:%u\n",
object->type, object->start_address, object->size,
object->instances,
object->min_reportid, object->max_reportid);
}
/* Store maximum reportid */
data->max_reportid = reportid;
/* If T44 exists, T9 position has to be directly after */
if (data->T44_address && (data->T5_address != data->T44_address + 1)) {
dev_err(dev, "Invalid T44 position\n");
ret = -EINVAL;
goto free_object_table;
}
/* Allocate message buffer */
data->msg_buf = kcalloc(data->max_reportid, data->T5_msg_size, GFP_KERNEL);
if (!data->msg_buf) {
dev_err(dev, "Failed to allocate message buffer\n");
ret = -ENOMEM;
goto free_object_table;
}
return 0;
free_object_table:
kfree(data->object_table);
return ret;
}
static int mxt_read_resolution(struct mxt_data *data)
{
struct i2c_client *client = data->client;
int error;
unsigned int x_range, y_range;
unsigned char orient;
unsigned char val;
/* Update matrix size in info struct */
error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, 1, &val);
if (error)
return error;
data->info.matrix_xsize = val;
error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, 1, &val);
if (error)
return error;
data->info.matrix_ysize = val;
/* Read X/Y size of touchscreen */
error = mxt_read_object(data, MXT_TOUCH_MULTI_T9,
MXT_TOUCH_XRANGE_MSB, &val);
if (error)
return error;
x_range = val << 8;
error = mxt_read_object(data, MXT_TOUCH_MULTI_T9,
MXT_TOUCH_XRANGE_LSB, &val);
if (error)
return error;
x_range |= val;
error = mxt_read_object(data, MXT_TOUCH_MULTI_T9,
MXT_TOUCH_YRANGE_MSB, &val);
if (error)
return error;
y_range = val << 8;
error = mxt_read_object(data, MXT_TOUCH_MULTI_T9,
MXT_TOUCH_YRANGE_LSB, &val);
if (error)
return error;
y_range |= val;
error = mxt_read_object(data, MXT_TOUCH_MULTI_T9,
MXT_TOUCH_ORIENT, &orient);
if (error)
return error;
/* Handle default values */
if (x_range == 0)
x_range = 1023;
if (y_range == 0)
y_range = 1023;
if (orient & MXT_XY_SWITCH) {
data->max_x = y_range;
data->max_y = x_range;
} else {
data->max_x = x_range;
data->max_y = y_range;
}
dev_info(&client->dev,
"Matrix Size X%uY%u Touchscreen size X%uY%u\n",
data->info.matrix_xsize, data->info.matrix_ysize,
data->max_x, data->max_y);
return 0;
}
static void mxt_initialize_regulator(struct mxt_data *data)
{
int ret;
struct i2c_client *client = data->client;
/*
Vdd and AVdd can be powered up in any order
XVdd must not be powered up until after Vdd
and must obey the rate-of-rise specification
*/
data->regulator_vdd = devm_regulator_get(&client->dev, "vdd");
if (IS_ERR(data->regulator_vdd)) {
dev_info(&client->dev,
"Atmel regulator_get for vdd failed: %ld\n",
PTR_ERR(data->regulator_vdd));
goto err_null_regulator;
}
data->regulator_avdd = devm_regulator_get(&client->dev, "avdd");
if (IS_ERR(data->regulator_avdd)) {
dev_info(&client->dev,
"Atmel regulator_get for avdd failed: %ld\n",
PTR_ERR(data->regulator_avdd));
goto err_put_regulator;
}
dev_info(&client->dev,
"Atmel regulator_get for vdd and avdd succeeded\n");
ret = regulator_enable(data->regulator_vdd);
if (ret < 0)
dev_err(&client->dev,
"Atmel regulator_enable for vdd failed; Error code:%d\n", ret);
ret = regulator_enable(data->regulator_avdd);
if (ret < 0)
dev_err(&client->dev,
"Atmel regulator_enable for avdd failed; Error code:%d\n", ret);
return;
err_put_regulator:
devm_regulator_put(data->regulator_vdd);
err_null_regulator:
data->regulator_avdd = NULL;
data->regulator_vdd = NULL;
}
static int mxt_initialize(struct mxt_data *data)
{
struct i2c_client *client = data->client;
struct mxt_info *info = &data->info;
int error;
u8 retry_count = 0;
retry_probe:
/* Read info block */
error = mxt_read_reg(client, 0, sizeof(*info), info);
if (error) {
error = mxt_probe_bootloader(data);
if (error) {
/* Chip is not in appmode or bootloader mode */
return error;
} else {
if (++retry_count > 10) {
dev_err(&client->dev,
"Could not recover device from "
"bootloader mode\n");
data->state = BOOTLOADER;
/* this is not an error state, we can reflash
* from here */
return 0;
}
/* Tell bootloader to enter app mode. Ignore errors
* since we're in a retry loop */
mxt_send_bootloader_cmd(data, false);
msleep(MXT_FWRESET_TIME);
goto retry_probe;
}
}
dev_info(&client->dev,
"Family ID: %d Variant ID: %d Version: %d.%d.%02X "
"Object Num: %d\n",
info->family_id, info->variant_id,
info->version >> 4, info->version & 0xf,
info->build, info->object_num);
data->state = APPMODE;
/* 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;
}
/* Read information block CRC */
error = mxt_read_info_block_crc(data);
if (error) {
dev_err(&client->dev, "Error %d reading info block CRC\n", error);
}
error = mxt_probe_power_cfg(data);
if (error) {
dev_err(&client->dev, "Failed to initialize power cfg\n");
return error;
}
/* Check register init values */
error = mxt_check_reg_init(data);
if (error) {
dev_err(&client->dev, "Failed to initialize config\n");
return error;
}
error = mxt_read_resolution(data);
if (error) {
dev_err(&client->dev, "Failed to initialize screen size\n");
return error;
}
return 0;
}
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 -1;
}
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 < 0) {
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->state != BOOTLOADER) {
/* Change to the bootloader mode */
ret = mxt_soft_reset(data, MXT_BOOT_VALUE);
if (ret)
goto release_firmware;
ret = mxt_get_bootloader_address(data);
if (ret)
goto release_firmware;
data->state = BOOTLOADER;
}
ret = mxt_check_bootloader(data, MXT_WAITING_BOOTLOAD_CMD);
if (ret) {
mxt_wait_for_chg(data);
/* Bootloader may still be unlocked from previous update
* attempt */
ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA);
if (ret) {
data->state = FAILED;
goto release_firmware;
}
} else {
dev_info(dev, "Unlocking bootloader\n");
/* Unlock bootloader */
ret = mxt_send_bootloader_cmd(data, true);
if (ret) {
data->state = FAILED;
goto release_firmware;
}
}
while (pos < fw->size) {
mxt_wait_for_chg(data);
ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA);
if (ret) {
data->state = FAILED;
goto release_firmware;
}
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) {
data->state = FAILED;
goto release_firmware;
}
mxt_wait_for_chg(data);
ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS);
if (ret) {
retry++;
/* Back off by 20ms per retry */
msleep(retry * 20);
if (retry > 20) {
data->state = FAILED;
goto release_firmware;
}
} else {
retry = 0;
pos += frame_size;
frame++;
}
if (frame % 10 == 0)
dev_info(dev, "Updated %d frames, %d/%zd bytes\n",
frame, pos, fw->size);
}
dev_info(dev, "Finished, sent %d frames, %zd bytes\n", frame, pos);
data->state = INIT;
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;
disable_irq(data->irq);
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");
/* Wait for reset */
msleep(MXT_FWRESET_TIME);
kfree(data->object_table);
data->object_table = NULL;
kfree(data->msg_buf);
data->msg_buf = NULL;
mxt_initialize(data);
}
if (data->state == APPMODE) {
enable_irq(data->irq);
}
return count;
}
static ssize_t mxt_version_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct mxt_data *data = dev_get_drvdata(dev);
int count = 0;
count += sprintf(buf + count, "%d", data->info.version);
count += sprintf(buf + count, "\n");
return count;
}
static ssize_t mxt_build_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct mxt_data *data = dev_get_drvdata(dev);
int count = 0;
count += sprintf(buf + count, "%d", data->info.build);
count += sprintf(buf + count, "\n");
return count;
}
static ssize_t mxt_pause_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct mxt_data *data = dev_get_drvdata(dev);
ssize_t count;
char c;
c = data->driver_paused ? '1' : '0';
count = sprintf(buf, "%c\n", c);
return count;
}
static ssize_t mxt_pause_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct mxt_data *data = dev_get_drvdata(dev);
int i;
if (sscanf(buf, "%u", &i) == 1 && i < 2) {
data->driver_paused = (i == 1);
dev_dbg(dev, "%s\n", i ? "paused" : "unpaused");
return count;
} else {
dev_dbg(dev, "pause_driver write error\n");
return -EINVAL;
}
}
static ssize_t mxt_debug_enable_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct mxt_data *data = dev_get_drvdata(dev);
int count;
char c;
c = data->debug_enabled ? '1' : '0';
count = sprintf(buf, "%c\n", c);
return count;
}
static ssize_t mxt_debug_enable_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct mxt_data *data = dev_get_drvdata(dev);
int i;
if (sscanf(buf, "%u", &i) == 1 && i < 2) {
data->debug_enabled = (i == 1);
dev_dbg(dev, "%s\n", i ? "debug enabled" : "debug disabled");
return count;
} else {
dev_dbg(dev, "debug_enabled write error\n");
return -EINVAL;
}
}
static int mxt_check_mem_access_params(struct mxt_data *data, loff_t off,
size_t *count)
{
if (data->state != APPMODE) {
dev_err(&data->client->dev, "Not in APPMODE\n");
return -EINVAL;
}
if (off >= data->mem_size)
return -EIO;
if (off + *count > data->mem_size)
*count = data->mem_size - off;
if (*count > MXT_MAX_BLOCK_WRITE)
*count = MXT_MAX_BLOCK_WRITE;
return 0;
}
static ssize_t mxt_slowscan_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct mxt_data *data = dev_get_drvdata(dev);
int count = 0;
int error;
u8 actv_cycle_time;
u8 idle_cycle_time;
u8 actv2idle_timeout;
dev_info(dev, "Calling mxt_slowscan_show()\n");
error = mxt_read_object(data, MXT_GEN_POWER_T7,
MXT_POWER_ACTVACQINT,
&actv_cycle_time);
if (error)
return error;
error = mxt_read_object(data, MXT_GEN_POWER_T7,
MXT_POWER_IDLEACQINT,
&idle_cycle_time);
if (error)
return error;
error = mxt_read_object(data, MXT_GEN_POWER_T7,
MXT_POWER_ACTV2IDLETO,
&actv2idle_timeout);
if (error)
return error;
count += sprintf(buf + count,
"SLOW SCAN (enable/disable) = %s.\n",
data->slowscan_enabled ? "enabled" : "disabled");
count += sprintf(buf + count,
"SLOW SCAN (actv_cycle_time) = %umS.\n",
data->slowscan_actv_cycle_time);
count += sprintf(buf + count,
"SLOW SCAN (idle_cycle_time) = %umS.\n",
data->slowscan_idle_cycle_time);
count += sprintf(buf + count,
"SLOW SCAN (actv2idle_timeout) = %u.%0uS.\n",
data->slowscan_actv2idle_timeout / 10,
data->slowscan_actv2idle_timeout % 10);
count += sprintf(buf + count,
"CURRENT (actv_cycle_time) = %umS.\n",
actv_cycle_time);
count += sprintf(buf + count,
"CURRENT (idle_cycle_time) = %umS.\n",
idle_cycle_time);
count += sprintf(buf + count,
"CURRENT (actv2idle_timeout) = %u.%0uS.\n",
actv2idle_timeout / 10, actv2idle_timeout % 10);
return count;
}
static ssize_t mxt_slowscan_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct mxt_data *data = dev_get_drvdata(dev);
int fn;
int val;
int ret;
dev_info(dev, "Calling mxt_slowscan_store()\n");
ret = sscanf(buf, "%u %u", &fn, &val);
if ((ret == 1) || (ret == 2)) {
switch (fn) {
case SLOSCAN_DISABLE:
if (data->slowscan_enabled) {
data->actv_cycle_time =
data->slowscan_shad_actv_cycle_time;
data->idle_cycle_time =
data->slowscan_shad_idle_cycle_time;
data->actv2idle_timeout =
data->slowscan_shad_actv2idle_timeout;
data->slowscan_enabled = 0;
mxt_set_power_cfg(data, 0);
}
break;
case SLOSCAN_ENABLE:
if (!data->slowscan_enabled) {
data->slowscan_shad_actv_cycle_time =
data->actv_cycle_time;
data->slowscan_shad_idle_cycle_time =
data->idle_cycle_time;
data->slowscan_shad_actv2idle_timeout =
data->actv2idle_timeout;
data->actv_cycle_time =
data->slowscan_actv_cycle_time;
data->idle_cycle_time =
data->slowscan_idle_cycle_time;
data->actv2idle_timeout =
data->slowscan_actv2idle_timeout;
data->slowscan_enabled = 1;
mxt_set_power_cfg(data, 0);
}
break;
case SLOSCAN_SET_ACTVACQINT:
data->slowscan_actv_cycle_time = val;
break;
case SLOSCAN_SET_IDLEACQINT:
data->slowscan_idle_cycle_time = val;
break;
case SLOSCAN_SET_ACTV2IDLETO:
data->slowscan_actv2idle_timeout = val;
break;
}
}
return count;
}
static ssize_t mxt_mem_access_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct mxt_data *data = dev_get_drvdata(dev);
int ret = 0;
ret = mxt_check_mem_access_params(data, off, &count);
if (ret < 0)
return ret;
if (count > 0)
ret = mxt_read_reg(data->client, off, count, buf);
return ret == 0 ? count : ret;
}
static ssize_t mxt_mem_access_write(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr, char *buf, loff_t off,
size_t count)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct mxt_data *data = dev_get_drvdata(dev);
int ret = 0;
ret = mxt_check_mem_access_params(data, off, &count);
if (ret < 0)
return ret;
if (count > 0)
ret = mxt_write_block(data->client, off, count, buf);
return ret == 0 ? count : 0;
}
static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
static DEVICE_ATTR(debug_enable, S_IWUSR | S_IRUSR, mxt_debug_enable_show,
mxt_debug_enable_store);
static DEVICE_ATTR(pause_driver, S_IWUSR | S_IRUSR, mxt_pause_show,
mxt_pause_store);
static DEVICE_ATTR(version, S_IRUGO, mxt_version_show, NULL);
static DEVICE_ATTR(build, S_IRUGO, mxt_build_show, NULL);
static DEVICE_ATTR(slowscan_enable, S_IWUSR | S_IRUSR,
mxt_slowscan_show, mxt_slowscan_store);
static struct attribute *mxt_attrs[] = {
&dev_attr_update_fw.attr,
&dev_attr_debug_enable.attr,
&dev_attr_pause_driver.attr,
&dev_attr_version.attr,
&dev_attr_build.attr,
&dev_attr_slowscan_enable.attr,
NULL
};
static const struct attribute_group mxt_attr_group = {
.attrs = mxt_attrs,
};
static void mxt_start(struct mxt_data *data)
{
int error;
struct device *dev = &data->client->dev;
if (data->is_stopped == 0)
return;
error = mxt_set_power_cfg(data, MXT_POWER_CFG_RUN);
if (error)
return;
/* At this point, it may be necessary to clear state
* by disabling/re-enabling the noise suppression object */
/* Recalibrate since chip has been in deep sleep */
error = mxt_write_object(data, MXT_GEN_COMMAND_T6,
MXT_COMMAND_CALIBRATE, 1);
if (!error)
dev_dbg(dev, "MXT started\n");
}
static void mxt_stop(struct mxt_data *data)
{
int error;
struct device *dev = &data->client->dev;
if (data->is_stopped)
return;
error = mxt_set_power_cfg(data, MXT_POWER_CFG_DEEPSLEEP);
if (!error)
dev_dbg(dev, "MXT suspended\n");
}
static int mxt_input_open(struct input_dev *dev)
{
struct mxt_data *data = input_get_drvdata(dev);
mxt_start(data);
return 0;
}
static void mxt_input_close(struct input_dev *dev)
{
struct mxt_data *data = input_get_drvdata(dev);
mxt_stop(data);
}
static int mxt_initialize_input_device(struct mxt_data *data)
{
struct device *dev = &data->client->dev;
struct input_dev *input_dev;
int ret;
int key;
/* Initialize input device */
input_dev = input_allocate_device();
if (!input_dev) {
dev_err(dev, "Failed to allocate input device\n");
return -ENOMEM;
}
if (data->pdata->input_name) {
input_dev->name = data->pdata->input_name;
} else {
input_dev->name = "atmel-maxtouch";
}
input_dev->id.bustype = BUS_I2C;
input_dev->dev.parent = dev;
input_dev->open = mxt_input_open;
input_dev->close = mxt_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, data->max_x, 0, 0);
input_set_abs_params(input_dev, ABS_Y,
0, data->max_y, 0, 0);
input_set_abs_params(input_dev, ABS_PRESSURE,
0, 255, 0, 0);
/* For multi touch */
input_mt_init_slots(input_dev,
data->num_touchids + data->num_stylusids, 0);
input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
0, MXT_MAX_AREA, 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);
input_set_abs_params(input_dev, ABS_MT_PRESSURE,
0, 255, 0, 0);
input_set_abs_params(input_dev, ABS_MT_ORIENTATION,
0, 255, 0, 0);
/* For T63 active stylus */
if (data->T63_reportid_min) {
__set_bit(BTN_STYLUS, input_dev->keybit);
__set_bit(BTN_STYLUS2, input_dev->keybit);
input_set_abs_params(input_dev, ABS_MT_TOOL_TYPE,
0, MT_TOOL_MAX, 0, 0);
}
/* For T15 key array */
mxt_t15_keystatus = 0;
for (key = 0; key < ARRAY_SIZE(mxt_t15_keys); key++) {
input_set_capability(input_dev, EV_KEY, mxt_t15_keys[key]);
}
input_set_drvdata(input_dev, data);
i2c_set_clientdata(data->client, data);
ret = input_register_device(input_dev);
if (ret) {
dev_err(dev, "Error %d registering input device\n", ret);
input_free_device(input_dev);
return ret;
}
data->input_dev = input_dev;
return 0;
}
static int mxt_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
const struct mxt_platform_data *pdata = client->dev.platform_data;
struct mxt_data *data;
int error;
if (!pdata)
return -EINVAL;
data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
if (!data) {
dev_err(&client->dev, "Failed to allocate memory\n");
return -ENOMEM;
}
data->state = INIT;
data->client = client;
data->pdata = pdata;
data->irq = client->irq;
mxt_initialize_regulator(data);
/* Initialize i2c device */
error = mxt_initialize(data);
if (error)
goto err_disable_regulator;
error = mxt_initialize_input_device(data);
if (error)
goto err_free_object;
error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
pdata->irqflags, client->dev.driver->name, data);
if (error) {
dev_err(&client->dev, "Error %d registering irq\n", error);
goto err_free_input_device;
}
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_irq;
}
sysfs_bin_attr_init(&data->mem_access_attr);
data->mem_access_attr.attr.name = "mem_access";
data->mem_access_attr.attr.mode = S_IRUGO | S_IWUSR;
data->mem_access_attr.read = mxt_mem_access_read;
data->mem_access_attr.write = mxt_mem_access_write;
data->mem_access_attr.size = data->mem_size;
if (sysfs_create_bin_file(&client->dev.kobj,
&data->mem_access_attr) < 0) {
dev_err(&client->dev, "Failed to create %s\n",
data->mem_access_attr.attr.name);
goto err_remove_sysfs_group;
}
return 0;
err_remove_sysfs_group:
sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
err_free_irq:
free_irq(client->irq, data);
err_free_input_device:
input_unregister_device(data->input_dev);
err_free_object:
kfree(data->msg_buf);
kfree(data->object_table);
err_disable_regulator:
regulator_disable(data->regulator_avdd);
regulator_disable(data->regulator_vdd);
kfree(data);
return error;
}
static int mxt_remove(struct i2c_client *client)
{
struct mxt_data *data = i2c_get_clientdata(client);
sysfs_remove_bin_file(&client->dev.kobj, &data->mem_access_attr);
sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
free_irq(data->irq, data);
input_unregister_device(data->input_dev);
kfree(data->msg_buf);
data->msg_buf = NULL;
kfree(data->object_table);
data->object_table = NULL;
regulator_disable(data->regulator_avdd);
regulator_disable(data->regulator_vdd);
kfree(data);
data = NULL;
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int mxt_suspend(struct device *dev)
{
int ret;
struct i2c_client *client = to_i2c_client(dev);
struct mxt_data *data = i2c_get_clientdata(client);
struct input_dev *input_dev = data->input_dev;
mutex_lock(&input_dev->mutex);
if (input_dev->users)
mxt_stop(data);
mutex_unlock(&input_dev->mutex);
if (data->regulator_vdd && data->regulator_avdd) {
ret = regulator_disable(data->regulator_avdd);
if (ret < 0) {
dev_err(dev,
"Atmel regulator disable for avdd failed: %d\n", ret);
}
ret = regulator_disable(data->regulator_vdd);
if (ret < 0) {
dev_err(dev,
"Atmel regulator disable for vdd failed: %d\n", ret);
}
}
return 0;
}
static int mxt_resume(struct device *dev)
{
int ret;
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 (data->regulator_vdd && data->regulator_avdd) {
ret = regulator_enable(data->regulator_vdd);
if (ret < 0) {
dev_err(dev,
"Atmel regulator enable for vdd failed: %d\n", ret);
}
ret = regulator_enable(data->regulator_avdd);
if (ret < 0) {
dev_err(dev,
"Atmel regulator enable for avdd failed: %d\n", ret);
}
}
mutex_lock(&input_dev->mutex);
if (input_dev->users)
mxt_start(data);
mutex_unlock(&input_dev->mutex);
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
static void mxt_shutdown(struct i2c_client *client)
{
struct mxt_data *data = i2c_get_clientdata(client);
disable_irq(data->irq);
data->state = SHUTDOWN;
}
static const struct i2c_device_id mxt_id[] = {
{ "qt602240_ts", 0 },
{ "atmel_mxt_ts", 0 },
{ "mXT224", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, mxt_id);
static struct i2c_driver mxt_driver = {
.driver = {
.name = "atmel_mxt_ts",
.owner = THIS_MODULE,
.pm = &mxt_pm_ops,
},
.probe = mxt_probe,
.remove = mxt_remove,
.shutdown = mxt_shutdown,
.id_table = mxt_id,
};
static int __init mxt_init(void)
{
return i2c_add_driver(&mxt_driver);
}
static void __exit mxt_exit(void)
{
i2c_del_driver(&mxt_driver);
}
module_init(mxt_init);
module_exit(mxt_exit);
/* Module information */
MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
MODULE_LICENSE("GPL");