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M7350/kernel/drivers/input/touchscreen/atmel_maxtouch_ts.c
T f75098198c M7350v5_en_gpl
2024-09-09 08:57:42 +00:00

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/*
* Atmel maXTouch Touchscreen driver
*
* Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
*
* Linux foundation chooses to take subject only to the GPLv2 license terms,
* and distributes only under these terms.
*
* Copyright (C) 2010 Samsung Electronics Co.Ltd
* Copyright (C) 2011-2012 Atmel Corporation
* Copyright (C) 2012 Google, Inc.
*
* 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/completion.h>
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/i2c.h>
#include <linux/input/atmel_maxtouch_ts.h>
#include <linux/input/mt.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/regulator/consumer.h>
#include <linux/gpio.h>
#include <linux/of_gpio.h>
#include <linux/of_irq.h>
#if defined(CONFIG_FB)
#include <linux/notifier.h>
#include <linux/fb.h>
#elif defined(CONFIG_HAS_EARLYSUSPEND)
#include <linux/earlysuspend.h>
/* Early-suspend level */
#define MXT_SUSPEND_LEVEL 1
#endif
#if defined(CONFIG_SECURE_TOUCH)
#include <linux/completion.h>
#include <linux/pm_runtime.h>
#include <linux/errno.h>
#include <linux/atomic.h>
#include <linux/clk.h>
#endif
/* Configuration file */
#define MXT_CFG_MAGIC "OBP_RAW V1"
/* Registers */
#define MXT_OBJECT_START 0x07
#define MXT_OBJECT_SIZE 6
#define MXT_INFO_CHECKSUM_SIZE 3
#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_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_PROCI_ACTIVE_STYLUS_T63 63
#define MXT_TOUCH_MULTITOUCHSCREEN_T100 100
/* 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
/* Define for T6 status byte */
#define MXT_T6_STATUS_RESET (1 << 7)
#define MXT_T6_STATUS_OFL (1 << 6)
#define MXT_T6_STATUS_SIGERR (1 << 5)
#define MXT_T6_STATUS_CAL (1 << 4)
#define MXT_T6_STATUS_CFGERR (1 << 3)
#define MXT_T6_STATUS_COMSERR (1 << 2)
/* MXT_GEN_POWER_T7 field */
struct t7_config {
u8 idle;
u8 active;
} __packed;
#define MXT_POWER_CFG_RUN 0
#define MXT_POWER_CFG_DEEPSLEEP 1
/* MXT_TOUCH_MULTI_T9 field */
#define MXT_T9_ORIENT 9
#define MXT_T9_RANGE 18
/* MXT_TOUCH_MULTI_T9 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)
struct t9_range {
u16 x;
u16 y;
} __packed;
/* MXT_TOUCH_MULTI_T9 orient */
#define MXT_T9_ORIENT_SWITCH (1 << 0)
/* MXT_SPT_COMMSCONFIG_T18 */
#define MXT_COMMS_CTRL 0
#define MXT_COMMS_CMD 1
#define MXT_COMMS_RETRIGEN (1 << 6)
/* Define for MXT_GEN_COMMAND_T6 */
#define MXT_BOOT_VALUE 0xa5
#define MXT_RESET_VALUE 0x01
#define MXT_BACKUP_VALUE 0x55
/* Define for MXT_PROCI_TOUCHSUPPRESSION_T42 */
#define MXT_T42_MSG_TCHSUP (1 << 0)
/* T47 Stylus */
#define MXT_TOUCH_MAJOR_T47_STYLUS 1
/* T63 Stylus */
#define MXT_T63_STYLUS_PRESS (1 << 0)
#define MXT_T63_STYLUS_RELEASE (1 << 1)
#define MXT_T63_STYLUS_MOVE (1 << 2)
#define MXT_T63_STYLUS_SUPPRESS (1 << 3)
#define MXT_T63_STYLUS_DETECT (1 << 4)
#define MXT_T63_STYLUS_TIP (1 << 5)
#define MXT_T63_STYLUS_ERASER (1 << 6)
#define MXT_T63_STYLUS_BARREL (1 << 7)
#define MXT_T63_STYLUS_PRESSURE_MASK 0x3F
/* T100 Multiple Touch Touchscreen */
#define MXT_T100_CTRL 0
#define MXT_T100_CFG1 1
#define MXT_T100_TCHAUX 3
#define MXT_T100_XRANGE 13
#define MXT_T100_YRANGE 24
#define MXT_T100_CFG_SWITCHXY (1 << 5)
#define MXT_T100_TCHAUX_VECT (1 << 0)
#define MXT_T100_TCHAUX_AMPL (1 << 1)
#define MXT_T100_TCHAUX_AREA (1 << 2)
#define MXT_T100_DETECT (1 << 7)
#define MXT_T100_TYPE_MASK 0x70
#define MXT_T100_TYPE_STYLUS 0x20
/* Delay times */
#define MXT_BACKUP_TIME 50 /* msec */
#define MXT_RESET_TIME 200 /* msec */
#define MXT_RESET_TIMEOUT 3000 /* msec */
#define MXT_CRC_TIMEOUT 1000 /* msec */
#define MXT_FW_RESET_TIME 3000 /* msec */
#define MXT_FW_CHG_TIMEOUT 300 /* msec */
#define MXT_WAKEUP_TIME 25 /* msec */
#define MXT_REGULATOR_DELAY 150 /* msec */
#define MXT_POWERON_DELAY 150 /* msec */
/* 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
/* Touchscreen absolute values */
#define MXT_MAX_AREA 0xff
#define MXT_PIXELS_PER_MM 20
#define DEBUG_MSG_MAX 200
#define MXT_COORDS_ARR_SIZE 4
/* Orient */
#define MXT_NORMAL 0x0
#define MXT_DIAGONAL 0x1
#define MXT_HORIZONTAL_FLIP 0x2
#define MXT_ROTATED_90_COUNTER 0x3
#define MXT_VERTICAL_FLIP 0x4
#define MXT_ROTATED_90 0x5
#define MXT_ROTATED_180 0x6
#define MXT_DIAGONAL_COUNTER 0x7
/* MXT_TOUCH_KEYARRAY_T15 */
#define MXT_KEYARRAY_MAX_KEYS 32
/* Bootoader IDs */
#define MXT_BOOTLOADER_ID_224 0x0A
#define MXT_BOOTLOADER_ID_224E 0x06
#define MXT_BOOTLOADER_ID_336S 0x1A
#define MXT_BOOTLOADER_ID_1386 0x01
#define MXT_BOOTLOADER_ID_1386E 0x10
#define MXT_BOOTLOADER_ID_1664S 0x14
/* recommended voltage specifications */
#define MXT_VDD_VTG_MIN_UV 1800000
#define MXT_VDD_VTG_MAX_UV 1800000
#define MXT_AVDD_VTG_MIN_UV 2700000
#define MXT_AVDD_VTG_MAX_UV 3300000
#define MXT_XVDD_VTG_MIN_UV 2700000
#define MXT_XVDD_VTG_MAX_UV 10000000
#define MXT_GEN_CFG "maxtouch_generic_cfg.raw"
#define MXT_NAME_MAX_LEN 100
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;
u8 size_minus_one;
u8 instances_minus_one;
u8 num_report_ids;
} __packed;
/* Each client has this additional data */
struct mxt_data {
struct i2c_client *client;
struct input_dev *input_dev;
struct pinctrl *ts_pinctrl;
struct pinctrl_state *gpio_state_active;
struct pinctrl_state *gpio_state_suspend;
char phys[64]; /* device physical location */
struct mxt_platform_data *pdata;
struct mxt_object *object_table;
struct mxt_info *info;
void *raw_info_block;
unsigned int irq;
unsigned int max_x;
unsigned int max_y;
bool in_bootloader;
u16 mem_size;
u8 t100_aux_ampl;
u8 t100_aux_area;
u8 t100_aux_vect;
struct bin_attribute mem_access_attr;
bool debug_enabled;
bool debug_v2_enabled;
u8 *debug_msg_data;
u16 debug_msg_count;
struct bin_attribute debug_msg_attr;
struct mutex debug_msg_lock;
u8 max_reportid;
u32 config_crc;
u32 info_crc;
u8 bootloader_addr;
struct t7_config t7_cfg;
u8 *msg_buf;
u8 t6_status;
bool update_input;
u8 last_message_count;
u8 num_touchids;
u8 num_stylusids;
unsigned long t15_keystatus;
bool use_retrigen_workaround;
bool use_regulator;
struct regulator *reg_vdd;
struct regulator *reg_avdd;
struct regulator *reg_xvdd;
char fw_name[MXT_NAME_MAX_LEN];
char cfg_name[MXT_NAME_MAX_LEN];
u8 cfg_version[3];
bool fw_w_no_cfg_update;
#if defined(CONFIG_FB)
struct notifier_block fb_notif;
#elif defined(CONFIG_HAS_EARLYSUSPEND)
struct early_suspend early_suspend;
#endif
/* Cached parameters from object table */
u16 T5_address;
u8 T5_msg_size;
u8 T6_reportid;
u16 T6_address;
u16 T7_address;
u8 T9_reportid_min;
u8 T9_reportid_max;
u8 T15_reportid_min;
u8 T15_reportid_max;
u16 T18_address;
u8 T19_reportid;
u8 T42_reportid_min;
u8 T42_reportid_max;
u16 T44_address;
u8 T48_reportid;
u8 T63_reportid_min;
u8 T63_reportid_max;
u8 T100_reportid_min;
u8 T100_reportid_max;
/* for fw update in bootloader */
struct completion bl_completion;
/* for reset handling */
struct completion reset_completion;
/* for reset handling */
struct completion crc_completion;
/* Enable reporting of input events */
bool enable_reporting;
/* Indicates whether device is in suspend */
bool suspended;
#if defined(CONFIG_SECURE_TOUCH)
atomic_t st_enabled;
atomic_t st_pending_irqs;
bool st_initialized;
struct completion st_powerdown;
struct clk *core_clk;
struct clk *iface_clk;
#endif
};
static inline unsigned int mxt_obj_size(const struct mxt_object *obj)
{
return obj->size_minus_one + 1;
}
static inline unsigned int mxt_obj_instances(const struct mxt_object *obj)
{
return obj->instances_minus_one + 1;
}
static bool mxt_object_readable(unsigned int type)
{
switch (type) {
case MXT_GEN_COMMAND_T6:
case MXT_GEN_POWER_T7:
case MXT_GEN_ACQUIRE_T8:
case MXT_GEN_DATASOURCE_T53:
case MXT_TOUCH_MULTI_T9:
case MXT_TOUCH_KEYARRAY_T15:
case MXT_TOUCH_PROXIMITY_T23:
case MXT_TOUCH_PROXKEY_T52:
case MXT_PROCI_GRIPFACE_T20:
case MXT_PROCG_NOISE_T22:
case MXT_PROCI_ONETOUCH_T24:
case MXT_PROCI_TWOTOUCH_T27:
case MXT_PROCI_GRIP_T40:
case MXT_PROCI_PALM_T41:
case MXT_PROCI_TOUCHSUPPRESSION_T42:
case MXT_PROCI_STYLUS_T47:
case MXT_PROCG_NOISESUPPRESSION_T48:
case MXT_SPT_COMMSCONFIG_T18:
case MXT_SPT_GPIOPWM_T19:
case MXT_SPT_SELFTEST_T25:
case MXT_SPT_CTECONFIG_T28:
case MXT_SPT_USERDATA_T38:
case MXT_SPT_DIGITIZER_T43:
case MXT_SPT_CTECONFIG_T46:
return true;
default:
return false;
}
}
static void mxt_dump_message(struct mxt_data *data, u8 *message)
{
print_hex_dump(KERN_DEBUG, "MXT MSG:", DUMP_PREFIX_NONE, 16, 1,
message, data->T5_msg_size, false);
}
static void mxt_debug_msg_enable(struct mxt_data *data)
{
struct device *dev = &data->client->dev;
if (data->debug_v2_enabled)
return;
mutex_lock(&data->debug_msg_lock);
data->debug_msg_data = kcalloc(DEBUG_MSG_MAX,
data->T5_msg_size, GFP_KERNEL);
if (!data->debug_msg_data) {
dev_err(&data->client->dev, "Failed to allocate buffer\n");
return;
}
data->debug_v2_enabled = true;
mutex_unlock(&data->debug_msg_lock);
dev_info(dev, "Enabled message output\n");
}
static void mxt_debug_msg_disable(struct mxt_data *data)
{
struct device *dev = &data->client->dev;
if (!data->debug_v2_enabled)
return;
dev_info(dev, "disabling message output\n");
data->debug_v2_enabled = false;
mutex_lock(&data->debug_msg_lock);
kfree(data->debug_msg_data);
data->debug_msg_data = NULL;
data->debug_msg_count = 0;
mutex_unlock(&data->debug_msg_lock);
dev_info(dev, "Disabled message output\n");
}
static void mxt_debug_msg_add(struct mxt_data *data, u8 *msg)
{
struct device *dev = &data->client->dev;
mutex_lock(&data->debug_msg_lock);
if (!data->debug_msg_data) {
dev_err(dev, "No buffer!\n");
return;
}
if (data->debug_msg_count < DEBUG_MSG_MAX) {
memcpy(data->debug_msg_data + data->debug_msg_count * data->T5_msg_size,
msg,
data->T5_msg_size);
data->debug_msg_count++;
} else {
dev_dbg(dev, "Discarding %u messages\n", data->debug_msg_count);
data->debug_msg_count = 0;
}
mutex_unlock(&data->debug_msg_lock);
sysfs_notify(&data->client->dev.kobj, NULL, "debug_notify");
}
static ssize_t mxt_debug_msg_write(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr, char *buf, loff_t off,
size_t count)
{
return -EIO;
}
static ssize_t mxt_debug_msg_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr, char *buf, loff_t off, size_t bytes)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct mxt_data *data = dev_get_drvdata(dev);
int count;
size_t bytes_read;
if (!data->debug_msg_data) {
dev_err(dev, "No buffer!\n");
return 0;
}
count = bytes / data->T5_msg_size;
if (count > DEBUG_MSG_MAX)
count = DEBUG_MSG_MAX;
mutex_lock(&data->debug_msg_lock);
if (count > data->debug_msg_count)
count = data->debug_msg_count;
bytes_read = count * data->T5_msg_size;
memcpy(buf, data->debug_msg_data, bytes_read);
data->debug_msg_count = 0;
mutex_unlock(&data->debug_msg_lock);
return bytes_read;
}
static int mxt_debug_msg_init(struct mxt_data *data)
{
sysfs_bin_attr_init(&data->debug_msg_attr);
data->debug_msg_attr.attr.name = "debug_msg";
data->debug_msg_attr.attr.mode = 0666;
data->debug_msg_attr.read = mxt_debug_msg_read;
data->debug_msg_attr.write = mxt_debug_msg_write;
data->debug_msg_attr.size = data->T5_msg_size * DEBUG_MSG_MAX;
if (sysfs_create_bin_file(&data->client->dev.kobj,
&data->debug_msg_attr) < 0)
dev_info(&data->client->dev, "Debugfs already exists\n");
return 0;
}
static void mxt_debug_msg_remove(struct mxt_data *data)
{
if (data->debug_msg_attr.attr.name)
sysfs_remove_bin_file(&data->client->dev.kobj,
&data->debug_msg_attr);
}
static int mxt_wait_for_completion(struct mxt_data *data,
struct completion *comp, unsigned int timeout_ms)
{
struct device *dev = &data->client->dev;
unsigned long timeout = msecs_to_jiffies(timeout_ms);
long ret;
ret = wait_for_completion_interruptible_timeout(comp, timeout);
if (ret < 0) {
dev_err(dev, "Wait for completion interrupted.\n");
return -EINTR;
} else if (ret == 0) {
dev_err(dev, "Wait for completion timed out.\n");
return -ETIMEDOUT;
}
return 0;
}
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);
if (ret == 1) {
ret = 0;
} else {
ret = (ret < 0) ? ret : -EIO;
dev_err(&data->client->dev, "%s: i2c recv failed (%d)\n",
__func__, ret);
}
return 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);
if (ret == 1) {
ret = 0;
} else {
ret = (ret < 0) ? ret : -EIO;
dev_err(&data->client->dev, "%s: i2c send failed (%d)\n",
__func__, ret);
}
return ret;
}
static int mxt_lookup_bootloader_address(struct mxt_data *data, bool retry)
{
u8 appmode = data->client->addr;
u8 bootloader;
u8 family_id = 0;
if (data->pdata->bl_addr) {
data->bootloader_addr = data->pdata->bl_addr;
return 0;
}
if (data->info)
family_id = data->info->family_id;
switch (appmode) {
case 0x4a:
case 0x4b:
/* Chips after 1664S use different scheme */
if (retry || family_id >= 0xa2) {
bootloader = appmode - 0x24;
break;
}
/* Fall through for normal case */
case 0x4c:
case 0x4d:
case 0x5a:
case 0x5b:
bootloader = appmode - 0x26;
break;
default:
dev_err(&data->client->dev,
"Appmode i2c address 0x%02x not found\n",
appmode);
return -EINVAL;
}
data->bootloader_addr = bootloader;
return 0;
}
static int mxt_probe_bootloader(struct mxt_data *data, bool retry)
{
struct device *dev = &data->client->dev;
int ret;
u8 val;
bool crc_failure;
ret = mxt_lookup_bootloader_address(data, retry);
if (ret)
return ret;
ret = mxt_bootloader_read(data, &val, 1);
if (ret)
return ret;
/* 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 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,
bool wait)
{
struct device *dev = &data->client->dev;
u8 val;
int ret;
recheck:
if (wait) {
/*
* In application update mode, the interrupt
* line signals state transitions. We must wait for the
* CHG assertion before reading the status byte.
* Once the status byte has been read, the line is deasserted.
*/
ret = mxt_wait_for_completion(data, &data->bl_completion,
MXT_FW_CHG_TIMEOUT);
if (ret) {
/*
* TODO: handle -EINTR better by terminating fw update
* process before returning to userspace by writing
* length 0x000 to device (iff we are in
* WAITING_FRAME_DATA state).
*/
dev_err(dev, "Update wait error %d\n", ret);
return ret;
}
}
ret = mxt_bootloader_read(data, &val, 1);
if (ret)
return ret;
if (state == MXT_WAITING_BOOTLOAD_CMD)
val = mxt_get_bootloader_version(data, val);
switch (state) {
case MXT_WAITING_BOOTLOAD_CMD:
case MXT_WAITING_FRAME_DATA:
case MXT_APP_CRC_FAIL:
val &= ~MXT_BOOT_STATUS_MASK;
break;
case MXT_FRAME_CRC_PASS:
if (val == MXT_FRAME_CRC_CHECK) {
goto recheck;
} else if (val == MXT_FRAME_CRC_FAIL) {
dev_err(dev, "Bootloader CRC fail\n");
return -EINVAL;
}
break;
default:
return -EINVAL;
}
if (val != state) {
dev_err(dev, "Invalid bootloader state %02X != %02X\n",
val, state);
return -EINVAL;
}
return 0;
}
static int mxt_send_bootloader_cmd(struct mxt_data *data, bool unlock)
{
int ret;
u8 buf[2];
if (unlock) {
buf[0] = MXT_UNLOCK_CMD_LSB;
buf[1] = MXT_UNLOCK_CMD_MSB;
} else {
buf[0] = 0x01;
buf[1] = 0x01;
}
ret = mxt_bootloader_write(data, buf, 2);
if (ret)
return ret;
return 0;
}
static int __mxt_read_reg(struct i2c_client *client,
u16 reg, u16 len, void *val)
{
struct i2c_msg xfer[2];
u8 buf[2];
int ret;
bool retry = false;
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(&client->dev, "%s: i2c retry\n", __func__);
msleep(MXT_WAKEUP_TIME);
retry = true;
goto retry_read;
} else {
dev_err(&client->dev, "%s: i2c transfer failed (%d)\n",
__func__, ret);
return -EIO;
}
}
return 0;
}
static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
const void *val)
{
u8 *buf;
int count;
int ret;
bool retry = false;
count = len + 2;
buf = kmalloc(count, GFP_KERNEL);
if (!buf)
return -ENOMEM;
buf[0] = reg & 0xff;
buf[1] = (reg >> 8) & 0xff;
memcpy(&buf[2], val, len);
retry_write:
ret = i2c_master_send(client, buf, count);
if (ret != count) {
if (!retry) {
dev_dbg(&client->dev, "%s: i2c retry\n", __func__);
msleep(MXT_WAKEUP_TIME);
retry = true;
goto retry_write;
} else {
dev_err(&client->dev, "%s: i2c send failed (%d)\n",
__func__, ret);
ret = -EIO;
}
} else {
ret = 0;
}
kfree(buf);
return ret;
}
static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
{
return __mxt_write_reg(client, reg, 1, &val);
}
static struct mxt_object *
mxt_get_object(struct mxt_data *data, u8 type)
{
struct mxt_object *object;
int i;
for (i = 0; i < data->info->object_num; i++) {
object = data->object_table + i;
if (object->type == type)
return object;
}
dev_warn(&data->client->dev, "Invalid object type T%u\n", type);
return NULL;
}
static void mxt_proc_t6_messages(struct mxt_data *data, u8 *msg)
{
struct device *dev = &data->client->dev;
u8 status = msg[1];
u32 crc = msg[2] | (msg[3] << 8) | (msg[4] << 16);
if (crc != data->config_crc) {
data->config_crc = crc;
dev_dbg(dev, "T6 Config Checksum: 0x%06X\n", crc);
complete(&data->crc_completion);
}
/* Detect transition out of reset */
if ((data->t6_status & MXT_T6_STATUS_RESET) &&
!(status & MXT_T6_STATUS_RESET))
complete(&data->reset_completion);
/* Output debug if status has changed */
if (status != data->t6_status)
dev_dbg(dev, "T6 Status 0x%02X%s%s%s%s%s%s%s\n",
status,
(status == 0) ? " OK" : "",
(status & MXT_T6_STATUS_RESET) ? " RESET" : "",
(status & MXT_T6_STATUS_OFL) ? " OFL" : "",
(status & MXT_T6_STATUS_SIGERR) ? " SIGERR" : "",
(status & MXT_T6_STATUS_CAL) ? " CAL" : "",
(status & MXT_T6_STATUS_CFGERR) ? " CFGERR" : "",
(status & MXT_T6_STATUS_COMSERR) ? " COMSERR" : "");
/* Save current status */
data->t6_status = status;
}
static void mxt_input_button(struct mxt_data *data, u8 *message)
{
struct input_dev *input = data->input_dev;
const struct mxt_platform_data *pdata = data->pdata;
bool button;
int i;
/* do not report events if input device not yet registered */
if (!data->enable_reporting)
return;
/* Active-low switch */
for (i = 0; i < pdata->t19_num_keys; i++) {
if (pdata->t19_keymap[i] == KEY_RESERVED)
continue;
button = !(message[1] & (1 << i));
input_report_key(input, pdata->t19_keymap[i], button);
}
}
static void mxt_input_sync(struct input_dev *input_dev)
{
input_mt_report_pointer_emulation(input_dev, false);
input_sync(input_dev);
}
static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
{
struct device *dev = &data->client->dev;
struct input_dev *input_dev = data->input_dev;
int id;
u8 status;
int x;
int y;
int area;
int amplitude;
u8 vector;
int tool;
/* do not report events if input device not yet registered */
if (!data->enable_reporting)
return;
id = message[0] - data->T9_reportid_min;
status = message[1];
x = (message[2] << 4) | ((message[4] >> 4) & 0xf);
y = (message[3] << 4) | ((message[4] & 0xf));
/* Handle 10/12 bit switching */
if (data->max_x < 1024)
x >>= 2;
if (data->max_y < 1024)
y >>= 2;
area = message[5];
amplitude = message[6];
vector = message[7];
dev_dbg(dev,
"[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u 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) {
/* Multiple bits may be set if the host is slow to read the
* status messages, indicating all the events that have
* happened */
if (status & MXT_T9_RELEASE) {
input_mt_report_slot_state(input_dev,
MT_TOOL_FINGER, 0);
mxt_input_sync(input_dev);
}
/* A reported size of zero indicates that the reported touch
* is a stylus from a linked Stylus T47 object. */
if (area == 0) {
area = MXT_TOUCH_MAJOR_T47_STYLUS;
tool = MT_TOOL_PEN;
} else {
tool = MT_TOOL_FINGER;
}
/* Touch active */
input_mt_report_slot_state(input_dev, tool, 1);
input_report_abs(input_dev, ABS_MT_POSITION_X, x);
input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
input_report_abs(input_dev, ABS_MT_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 active, close out slot */
input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 0);
}
data->update_input = true;
}
static void mxt_proc_t100_message(struct mxt_data *data, u8 *message)
{
struct device *dev = &data->client->dev;
struct input_dev *input_dev = data->input_dev;
int id;
u8 status;
int x;
int y;
int tool;
/* do not report events if input device not yet registered */
if (!data->enable_reporting)
return;
id = message[0] - data->T100_reportid_min - 2;
/* ignore SCRSTATUS events */
if (id < 0)
return;
status = message[1];
x = (message[3] << 8) | message[2];
y = (message[5] << 8) | message[4];
dev_dbg(dev,
"[%u] status:%02X x:%u y:%u area:%02X amp:%02X vec:%02X\n",
id,
status,
x, y,
(data->t100_aux_area) ? message[data->t100_aux_area] : 0,
(data->t100_aux_ampl) ? message[data->t100_aux_ampl] : 0,
(data->t100_aux_vect) ? message[data->t100_aux_vect] : 0);
input_mt_slot(input_dev, id);
if (status & MXT_T100_DETECT) {
/* A reported size of zero indicates that the reported touch
* is a stylus from a linked Stylus T47 object. */
if ((status & MXT_T100_TYPE_MASK) == MXT_T100_TYPE_STYLUS)
tool = MT_TOOL_PEN;
else
tool = MT_TOOL_FINGER;
/* Touch active */
input_mt_report_slot_state(input_dev, tool, 1);
input_report_abs(input_dev, ABS_MT_POSITION_X, x);
input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
if (data->t100_aux_ampl)
input_report_abs(input_dev, ABS_MT_PRESSURE,
message[data->t100_aux_ampl]);
else
input_report_abs(input_dev, ABS_MT_PRESSURE, 255);
if (data->t100_aux_area) {
if (tool == MT_TOOL_PEN)
input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR,
MXT_TOUCH_MAJOR_T47_STYLUS);
else
input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR,
message[data->t100_aux_area]);
}
if (data->t100_aux_vect)
input_report_abs(input_dev, ABS_MT_ORIENTATION,
message[data->t100_aux_vect]);
} else {
/* Touch no longer active, close out slot */
input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 0);
}
data->update_input = true;
}
static void mxt_proc_t15_messages(struct mxt_data *data, u8 *msg)
{
struct input_dev *input_dev = data->input_dev;
struct device *dev = &data->client->dev;
int key;
bool curr_state, new_state;
bool sync = false;
unsigned long keystates = le32_to_cpu(msg[2]);
/* do not report events if input device not yet registered */
if (!data->enable_reporting)
return;
for (key = 0; key < data->pdata->t15_num_keys; key++) {
curr_state = test_bit(key, &data->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, &data->t15_keystatus);
input_event(input_dev, EV_KEY,
data->pdata->t15_keymap[key], 1);
sync = true;
} else if (curr_state && !new_state) {
dev_dbg(dev, "T15 key release: %u\n", key);
__clear_bit(key, &data->t15_keystatus);
input_event(input_dev, EV_KEY,
data->pdata->t15_keymap[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;
/* do not report events if input device not yet registered */
if (!data->enable_reporting)
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_T63_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_T63_STYLUS_SUPPRESS) ? 'S' : '.',
(msg[1] & MXT_T63_STYLUS_MOVE) ? 'M' : '.',
(msg[1] & MXT_T63_STYLUS_RELEASE) ? 'R' : '.',
(msg[1] & MXT_T63_STYLUS_PRESS) ? 'P' : '.',
x, y, pressure,
(msg[2] & MXT_T63_STYLUS_BARREL) ? 'B' : '.',
(msg[2] & MXT_T63_STYLUS_ERASER) ? 'E' : '.',
(msg[2] & MXT_T63_STYLUS_TIP) ? 'T' : '.',
(msg[2] & MXT_T63_STYLUS_DETECT) ? 'D' : '.');
input_mt_slot(input_dev, id);
if (msg[2] & MXT_T63_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_T63_STYLUS_ERASER));
input_report_key(input_dev, BTN_STYLUS2,
(msg[2] & MXT_T63_STYLUS_BARREL));
mxt_input_sync(input_dev);
}
static int mxt_proc_message(struct mxt_data *data, u8 *message)
{
u8 report_id = message[0];
bool dump = data->debug_enabled;
if (report_id == MXT_RPTID_NOMSG)
return 0;
if (report_id == data->T6_reportid) {
mxt_proc_t6_messages(data, message);
} else if (report_id >= data->T9_reportid_min
&& report_id <= data->T9_reportid_max) {
mxt_proc_t9_message(data, message);
} else if (report_id >= data->T100_reportid_min
&& report_id <= data->T100_reportid_max) {
mxt_proc_t100_message(data, message);
} else if (report_id == data->T19_reportid) {
mxt_input_button(data, message);
data->update_input = true;
} else if (report_id >= data->T63_reportid_min
&& report_id <= data->T63_reportid_max) {
mxt_proc_t63_messages(data, message);
} else if (report_id >= data->T42_reportid_min
&& report_id <= data->T42_reportid_max) {
mxt_proc_t42_messages(data, message);
} else if (report_id == data->T48_reportid) {
mxt_proc_t48_messages(data, message);
} else if (report_id >= data->T15_reportid_min
&& report_id <= data->T15_reportid_max) {
mxt_proc_t15_messages(data, message);
} else {
dump = true;
}
if (dump)
mxt_dump_message(data, message);
if (data->debug_v2_enabled)
mxt_debug_msg_add(data, message);
return 1;
}
static int mxt_read_and_process_messages(struct mxt_data *data, u8 count)
{
struct device *dev = &data->client->dev;
int ret;
int i;
u8 num_valid = 0;
/* Safety check for msg_buf */
if (count > data->max_reportid)
return -EINVAL;
/* Process remaining messages if necessary */
ret = __mxt_read_reg(data->client, data->T5_address,
data->T5_msg_size * count, data->msg_buf);
if (ret) {
dev_err(dev, "Failed to read %u messages (%d)\n", count, ret);
return ret;
}
for (i = 0; i < count; i++) {
ret = mxt_proc_message(data,
data->msg_buf + data->T5_msg_size * i);
if (ret == 1)
num_valid++;
}
/* return number of messages read */
return num_valid;
}
static irqreturn_t mxt_process_messages_t44(struct mxt_data *data)
{
struct device *dev = &data->client->dev;
int ret;
u8 count, num_left;
/* Read T44 and T5 together */
ret = __mxt_read_reg(data->client, data->T44_address,
data->T5_msg_size + 1, data->msg_buf);
if (ret) {
dev_err(dev, "Failed to read T44 and T5 (%d)\n", ret);
return IRQ_NONE;
}
count = data->msg_buf[0];
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 %d exceeded max report id\n", count);
count = data->max_reportid;
}
/* Process first message */
ret = mxt_proc_message(data, data->msg_buf + 1);
if (ret < 0) {
dev_warn(dev, "Unexpected invalid message\n");
return IRQ_NONE;
}
num_left = count - 1;
/* Process remaining messages if necessary */
if (num_left) {
ret = mxt_read_and_process_messages(data, num_left);
if (ret < 0)
goto end;
else if (ret != num_left)
dev_warn(dev, "Unexpected invalid message\n");
}
end:
if (data->update_input) {
mxt_input_sync(data->input_dev);
data->update_input = false;
}
return IRQ_HANDLED;
}
static int mxt_process_messages_until_invalid(struct mxt_data *data)
{
struct device *dev = &data->client->dev;
int count, read;
u8 tries = 2;
count = data->max_reportid;
/* Read messages until we force an invalid */
do {
read = mxt_read_and_process_messages(data, count);
if (read < count)
return 0;
} while (--tries);
if (data->update_input) {
mxt_input_sync(data->input_dev);
data->update_input = false;
}
dev_err(dev, "CHG pin isn't cleared\n");
return -EBUSY;
}
static irqreturn_t mxt_process_messages(struct mxt_data *data)
{
int total_handled, num_handled;
u8 count = data->last_message_count;
if (count < 1 || count > data->max_reportid)
count = 1;
/* include final invalid message */
total_handled = mxt_read_and_process_messages(data, count + 1);
if (total_handled < 0)
return IRQ_NONE;
/* if there were invalid messages, then we are done */
else if (total_handled <= count)
goto update_count;
/* read two at a time until an invalid message or else we reach
* reportid limit */
do {
num_handled = mxt_read_and_process_messages(data, 2);
if (num_handled < 0)
return IRQ_NONE;
total_handled += num_handled;
if (num_handled < 2)
break;
} while (total_handled < data->num_touchids);
update_count:
data->last_message_count = total_handled;
if (data->enable_reporting && data->update_input) {
mxt_input_sync(data->input_dev);
data->update_input = false;
}
return IRQ_HANDLED;
}
#if defined(CONFIG_SECURE_TOUCH)
static void mxt_secure_touch_notify(struct mxt_data *data)
{
sysfs_notify(&data->client->dev.kobj, NULL, "secure_touch");
}
static irqreturn_t mxt_filter_interrupt(struct mxt_data *data)
{
if (atomic_read(&data->st_enabled)) {
if (atomic_cmpxchg(&data->st_pending_irqs, 0, 1) == 0)
mxt_secure_touch_notify(data);
return IRQ_HANDLED;
}
return IRQ_NONE;
}
#else
static irqreturn_t mxt_filter_interrupt(struct mxt_data *data)
{
return IRQ_NONE;
}
#endif
static irqreturn_t mxt_interrupt(int irq, void *dev_id)
{
struct mxt_data *data = dev_id;
if (data->in_bootloader) {
/* bootloader state transition completion */
complete(&data->bl_completion);
return IRQ_HANDLED;
}
if (IRQ_HANDLED == mxt_filter_interrupt(data))
return IRQ_HANDLED;
if (!data->object_table)
return IRQ_NONE;
if (data->T44_address) {
return mxt_process_messages_t44(data);
} else {
return mxt_process_messages(data);
}
}
static int mxt_t6_command(struct mxt_data *data, u16 cmd_offset,
u8 value, bool wait)
{
u16 reg;
u8 command_register;
int timeout_counter = 0;
int ret;
reg = data->T6_address + cmd_offset;
ret = mxt_write_reg(data->client, reg, value);
if (ret)
return ret;
if (!wait)
return 0;
do {
msleep(20);
ret = __mxt_read_reg(data->client, reg, 1, &command_register);
if (ret)
return ret;
} while ((command_register != 0) && (timeout_counter++ <= 100));
if (timeout_counter > 100) {
dev_err(&data->client->dev, "Command failed!\n");
return -EIO;
}
return 0;
}
static int mxt_soft_reset(struct mxt_data *data)
{
struct device *dev = &data->client->dev;
int ret = 0;
dev_info(dev, "Resetting chip\n");
reinit_completion(&data->reset_completion);
ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_RESET_VALUE, false);
if (ret)
return ret;
ret = mxt_wait_for_completion(data, &data->reset_completion,
MXT_RESET_TIMEOUT);
if (ret)
return ret;
return 0;
}
static void mxt_update_crc(struct mxt_data *data, u8 cmd, u8 value)
{
/* on failure, CRC is set to 0 and config will always be downloaded */
data->config_crc = 0;
reinit_completion(&data->crc_completion);
mxt_t6_command(data, cmd, value, true);
/* Wait for crc message. On failure, CRC is set to 0 and config will
* always be downloaded */
mxt_wait_for_completion(data, &data->crc_completion, MXT_CRC_TIMEOUT);
}
static void mxt_calc_crc24(u32 *crc, u8 firstbyte, u8 secondbyte)
{
static const unsigned int crcpoly = 0x80001B;
u32 result;
u32 data_word;
data_word = (secondbyte << 8) | firstbyte;
result = ((*crc << 1) ^ data_word);
if (result & 0x1000000)
result ^= crcpoly;
*crc = result;
}
static u32 mxt_calculate_crc(u8 *base, off_t start_off, off_t end_off)
{
u32 crc = 0;
u8 *ptr = base + start_off;
u8 *last_val = base + end_off - 1;
if (end_off < start_off)
return -EINVAL;
while (ptr < last_val) {
mxt_calc_crc24(&crc, *ptr, *(ptr + 1));
ptr += 2;
}
/* if len is odd, fill the last byte with 0 */
if (ptr == last_val)
mxt_calc_crc24(&crc, *ptr, 0);
/* Mask to 24-bit */
crc &= 0x00FFFFFF;
return crc;
}
static int mxt_check_retrigen(struct mxt_data *data)
{
struct i2c_client *client = data->client;
int error;
int val;
if (data->pdata->irqflags & IRQF_TRIGGER_LOW)
return 0;
if (data->T18_address) {
error = __mxt_read_reg(client,
data->T18_address + MXT_COMMS_CTRL,
1, &val);
if (error)
return error;
if (val & MXT_COMMS_RETRIGEN)
return 0;
}
dev_warn(&client->dev, "Enabling RETRIGEN workaround\n");
data->use_retrigen_workaround = true;
return 0;
}
static int mxt_init_t7_power_cfg(struct mxt_data *data);
static int mxt_update_cfg_version(struct mxt_data *data)
{
struct mxt_object *object;
int error;
object = mxt_get_object(data, MXT_SPT_USERDATA_T38);
if (!object)
return -EINVAL;
error = __mxt_read_reg(data->client, object->start_address,
sizeof(data->cfg_version), &data->cfg_version);
if (error)
return error;
return 0;
}
static int mxt_update_t100_resolution(struct mxt_data *data)
{
struct i2c_client *client = data->client;
int error;
struct mxt_object *object;
u16 range_x, range_y, temp;
u8 cfg, tchaux;
u8 aux;
bool update = false;
object = mxt_get_object(data, MXT_TOUCH_MULTITOUCHSCREEN_T100);
if (!object)
return -EINVAL;
error = __mxt_read_reg(client,
object->start_address + MXT_T100_XRANGE,
sizeof(range_x), &range_x);
if (error)
return error;
le16_to_cpus(range_x);
error = __mxt_read_reg(client,
object->start_address + MXT_T100_YRANGE,
sizeof(range_y), &range_y);
if (error)
return error;
le16_to_cpus(range_y);
error = __mxt_read_reg(client,
object->start_address + MXT_T100_CFG1,
1, &cfg);
if (error)
return error;
error = __mxt_read_reg(client,
object->start_address + MXT_T100_TCHAUX,
1, &tchaux);
if (error)
return error;
/* Handle default values */
if (range_x == 0)
range_x = 1023;
/* Handle default values */
if (range_x == 0)
range_x = 1023;
if (range_y == 0)
range_y = 1023;
dev_dbg(&client->dev, "initial x=%d y=%d\n", range_x, range_y);
if (cfg & MXT_T100_CFG_SWITCHXY) {
dev_dbg(&client->dev, "flip x and y\n");
temp = range_y;
range_y = range_x;
range_x = temp;
}
if (data->pdata->panel_maxx != range_x) {
if (cfg & MXT_T100_CFG_SWITCHXY)
range_x = data->pdata->panel_maxy;
else
range_x = data->pdata->panel_maxx;
cpu_to_le16s(range_x);
error = __mxt_write_reg(client,
object->start_address + MXT_T100_XRANGE,
sizeof(range_x), &range_x);
if (error)
return error;
dev_dbg(&client->dev, "panel maxx mismatch. update\n");
update = true;
}
if (data->pdata->panel_maxy != range_y) {
if (cfg & MXT_T100_CFG_SWITCHXY)
range_y = data->pdata->panel_maxx;
else
range_y = data->pdata->panel_maxy;
cpu_to_le16s(range_y);
error = __mxt_write_reg(client,
object->start_address + MXT_T100_YRANGE,
sizeof(range_y), &range_y);
if (error)
return error;
dev_dbg(&client->dev, "panel maxy mismatch. update\n");
update = true;
}
if (update) {
mxt_update_crc(data, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE);
mxt_soft_reset(data);
}
/* allocate aux bytes */
aux = 6;
if (tchaux & MXT_T100_TCHAUX_VECT)
data->t100_aux_vect = aux++;
if (tchaux & MXT_T100_TCHAUX_AMPL)
data->t100_aux_ampl = aux++;
if (tchaux & MXT_T100_TCHAUX_AREA)
data->t100_aux_area = aux++;
dev_info(&client->dev,
"T100 Touchscreen size X%uY%u\n", range_x, range_y);
return 0;
}
static int mxt_update_t9_resolution(struct mxt_data *data)
{
struct i2c_client *client = data->client;
int error;
struct t9_range range;
unsigned char orient;
struct mxt_object *object;
u16 temp;
bool update = false;
object = mxt_get_object(data, MXT_TOUCH_MULTI_T9);
if (!object)
return -EINVAL;
error = __mxt_read_reg(client,
object->start_address + MXT_T9_RANGE,
sizeof(range), &range);
if (error)
return error;
le16_to_cpus(range.x);
le16_to_cpus(range.y);
error = __mxt_read_reg(client,
object->start_address + MXT_T9_ORIENT,
1, &orient);
if (error)
return error;
/* Handle default values */
if (range.x == 0)
range.x = 1023;
if (range.y == 0)
range.y = 1023;
dev_dbg(&client->dev, "initial x=%d y=%d\n", range.x, range.y);
if (orient & MXT_T9_ORIENT_SWITCH) {
dev_dbg(&client->dev, "flip x and y\n");
temp = range.y;
range.y = range.x;
range.x = temp;
}
if (data->pdata->panel_maxx != range.x) {
if (orient & MXT_T9_ORIENT_SWITCH)
range.x = data->pdata->panel_maxy;
else
range.x = data->pdata->panel_maxx;
cpu_to_le16s(range.x);
error = __mxt_write_reg(client,
object->start_address + MXT_T100_XRANGE,
sizeof(range.x), &range.x);
if (error)
return error;
dev_dbg(&client->dev, "panel maxx mismatch. update\n");
update = true;
}
if (data->pdata->panel_maxy != range.y) {
if (orient & MXT_T9_ORIENT_SWITCH)
range.y = data->pdata->panel_maxx;
else
range.y = data->pdata->panel_maxy;
cpu_to_le16s(range.y);
error = __mxt_write_reg(client,
object->start_address + MXT_T100_YRANGE,
sizeof(range.y), &range.y);
if (error)
return error;
dev_dbg(&client->dev, "panel maxy mismatch. update\n");
update = true;
}
if (update) {
mxt_update_crc(data, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE);
mxt_soft_reset(data);
}
dev_info(&client->dev,
"Touchscreen size X%uY%u\n", range.x, range.y);
return 0;
}
/*
* mxt_load_cfg - download configuration to chip
*
* Atmel Raw Config File Format
*
* The first four lines of the raw config file contain:
* 1) Version
* 2) Chip ID Information (first 7 bytes of device memory)
* 3) Chip Information Block 24-bit CRC Checksum
* 4) Chip Configuration 24-bit CRC Checksum
*
* The rest of the file consists of one line per object instance:
* <TYPE> <INSTANCE> <SIZE> <CONTENTS>
*
* <TYPE> - 2-byte object type as hex
* <INSTANCE> - 2-byte object instance number as hex
* <SIZE> - 2-byte object size as hex
* <CONTENTS> - array of <SIZE> 1-byte hex values
*/
static int mxt_load_cfg(struct mxt_data *data, bool force)
{
struct device *dev = &data->client->dev;
struct mxt_info cfg_info;
struct mxt_object *object;
const struct firmware *cfg = NULL;
int ret = 0;
int offset;
int data_pos;
int byte_offset;
int i;
int cfg_start_ofs;
u32 info_crc, config_crc, calculated_crc;
u8 *config_mem;
unsigned int config_mem_size;
unsigned int type, instance, size;
u8 val;
int ver[3];
u16 reg;
if (!data->cfg_name) {
dev_dbg(dev, "Skipping cfg download\n");
goto report_enable;
}
ret = request_firmware(&cfg, data->cfg_name, dev);
if (ret < 0) {
dev_err(dev, "Failure to request config file %s\n",
data->cfg_name);
goto report_enable;
}
mxt_update_crc(data, MXT_COMMAND_REPORTALL, 1);
if (strncmp(cfg->data, MXT_CFG_MAGIC, strlen(MXT_CFG_MAGIC))) {
dev_err(dev, "Unrecognised config file\n");
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;
}
if (cfg_info.family_id != data->info->family_id) {
dev_err(dev, "Family ID mismatch!\n");
ret = -EINVAL;
goto release;
}
if (cfg_info.variant_id != data->info->variant_id) {
dev_err(dev, "Variant ID mismatch!\n");
ret = -EINVAL;
goto release;
}
/* Read CRCs */
ret = sscanf(cfg->data + data_pos, "%x%n", &info_crc, &offset);
if (ret != 1) {
dev_err(dev, "Bad format: failed to parse Info CRC\n");
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: failed to parse Config CRC\n");
ret = -EINVAL;
goto release;
}
data_pos += offset;
/* Malloc memory to store configuration */
cfg_start_ofs = MXT_OBJECT_START
+ data->info->object_num * sizeof(struct mxt_object)
+ MXT_INFO_CHECKSUM_SIZE;
config_mem_size = data->mem_size - cfg_start_ofs;
config_mem = kzalloc(config_mem_size, GFP_KERNEL);
if (!config_mem) {
dev_err(dev, "Failed to allocate memory\n");
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: failed to parse object\n");
ret = -EINVAL;
goto release_mem;
}
data_pos += offset;
if (type == MXT_SPT_USERDATA_T38) {
ret = sscanf(cfg->data + data_pos, "%x %x %x",
&ver[0], &ver[1], &ver[2]);
dev_info(dev, "controller version:%d.%d.%d file version:%d.%d.%d",
data->cfg_version[0], data->cfg_version[1],
data->cfg_version[2], ver[0], ver[1], ver[2]);
if (force || data->fw_w_no_cfg_update) {
dev_info(dev, "starting force cfg update\n");
} else if (data->cfg_version[0] != ver[0]) {
dev_info(dev, "cfg major versions do not match\n");
ret = -EINVAL;
goto release_mem;
} else if (data->cfg_version[1] > ver[1]) {
dev_info(dev, "configuration is up-to-date\n");
ret = -EINVAL;
goto release_mem;
} else if (data->cfg_version[1] == ver[1]) {
if (data->cfg_version[2] >= ver[2]) {
dev_info(dev, "configuration is up-to-date\n");
ret = -EINVAL;
goto release_mem;
}
} else {
dev_info(dev, "starting cfg update\n");
}
}
object = mxt_get_object(data, type);
if (!object) {
/* Skip object */
for (i = 0; i < size; i++) {
ret = sscanf(cfg->data + data_pos, "%hhx%n",
&val,
&offset);
data_pos += offset;
}
continue;
}
if (size > mxt_obj_size(object)) {
/* Either we are in fallback mode due to wrong
* config or config from a later fw version,
* or the file is corrupt or hand-edited */
dev_warn(dev, "Discarding %u byte(s) in T%u\n",
size - mxt_obj_size(object), type);
} else if (mxt_obj_size(object) > size) {
/* If firmware is upgraded, new bytes may be added to
* end of objects. It is generally forward compatible
* to zero these bytes - previous behaviour will be
* retained. However this does invalidate the CRC and
* will force fallback mode until the configuration is
* updated. We warn here but do nothing else - the
* malloc has zeroed the entire configuration. */
dev_warn(dev, "Zeroing %u byte(s) in T%d\n",
mxt_obj_size(object) - size, type);
}
if (instance >= mxt_obj_instances(object)) {
dev_err(dev, "Object instances exceeded!\n");
ret = -EINVAL;
goto release_mem;
}
reg = object->start_address + mxt_obj_size(object) * instance;
for (i = 0; i < size; i++) {
ret = sscanf(cfg->data + data_pos, "%hhx%n",
&val,
&offset);
if (ret != 1) {
dev_err(dev, "Bad format in T%d\n", type);
ret = -EINVAL;
goto release_mem;
}
data_pos += offset;
if (i > mxt_obj_size(object))
continue;
byte_offset = reg + i - cfg_start_ofs;
if ((byte_offset >= 0)
&& (byte_offset <= config_mem_size)) {
*(config_mem + byte_offset) = val;
} else {
dev_err(dev, "Bad object: reg:%d, T%d, ofs=%d\n",
reg, object->type, byte_offset);
ret = -EINVAL;
goto release_mem;
}
}
}
/* calculate crc of the received configs (not the raw config file) */
if (data->T7_address < cfg_start_ofs) {
dev_err(dev, "Bad T7 address, T7addr = %x, config offset %x\n",
data->T7_address, cfg_start_ofs);
ret = 0;
goto release_mem;
}
calculated_crc = mxt_calculate_crc(config_mem,
data->T7_address - cfg_start_ofs,
config_mem_size);
if (config_crc > 0 && (config_crc != calculated_crc))
dev_warn(dev, "Config CRC error, calculated=%06X, file=%06X\n",
calculated_crc, config_crc);
/* 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_reg(data->client,
cfg_start_ofs + 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;
}
mxt_update_crc(data, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE);
ret = mxt_check_retrigen(data);
if (ret)
goto release_mem;
ret = mxt_soft_reset(data);
if (ret)
goto release_mem;
dev_info(dev, "Config written\n");
/* T7 config may have changed */
mxt_init_t7_power_cfg(data);
mxt_update_cfg_version(data);
/* update resolution if needed */
if (data->T9_reportid_min) {
ret = mxt_update_t9_resolution(data);
if (ret)
goto release_mem;
} else if (data->T100_reportid_min) {
ret = mxt_update_t100_resolution(data);
if (ret)
goto release_mem;
} else {
dev_warn(dev, "No touch object detected\n");
}
release_mem:
kfree(config_mem);
release:
release_firmware(cfg);
report_enable:
data->enable_reporting = true;
return ret;
}
static int mxt_set_t7_power_cfg(struct mxt_data *data, u8 sleep)
{
struct device *dev = &data->client->dev;
int error;
struct t7_config *new_config;
struct t7_config deepsleep = { .active = 0, .idle = 0 };
if (sleep == MXT_POWER_CFG_DEEPSLEEP)
new_config = &deepsleep;
else
new_config = &data->t7_cfg;
error = __mxt_write_reg(data->client, data->T7_address,
sizeof(data->t7_cfg),
new_config);
if (error)
return error;
dev_dbg(dev, "Set T7 ACTV:%d IDLE:%d\n",
new_config->active, new_config->idle);
return 0;
}
static int mxt_init_t7_power_cfg(struct mxt_data *data)
{
struct device *dev = &data->client->dev;
int error;
bool retry = false;
recheck:
error = __mxt_read_reg(data->client, data->T7_address,
sizeof(data->t7_cfg), &data->t7_cfg);
if (error)
return error;
if (data->t7_cfg.active == 0 || data->t7_cfg.idle == 0) {
if (!retry) {
dev_info(dev, "T7 cfg zero, resetting\n");
mxt_soft_reset(data);
retry = true;
goto recheck;
} else {
dev_dbg(dev, "T7 cfg zero after reset, overriding\n");
data->t7_cfg.active = 20;
data->t7_cfg.idle = 100;
return mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
}
} else {
dev_info(dev, "Initialised power cfg: ACTV %d, IDLE %d\n",
data->t7_cfg.active, data->t7_cfg.idle);
return 0;
}
}
static int mxt_acquire_irq(struct mxt_data *data)
{
int error;
enable_irq(data->irq);
if (data->use_retrigen_workaround) {
error = mxt_process_messages_until_invalid(data);
if (error)
return error;
}
return 0;
}
static void mxt_free_input_device(struct mxt_data *data)
{
if (data->input_dev) {
input_unregister_device(data->input_dev);
data->input_dev = NULL;
}
}
static void mxt_free_object_table(struct mxt_data *data)
{
mxt_debug_msg_remove(data);
kfree(data->raw_info_block);
data->object_table = NULL;
data->info = NULL;
data->raw_info_block = NULL;
kfree(data->msg_buf);
data->msg_buf = NULL;
mxt_free_input_device(data);
data->enable_reporting = false;
data->T5_address = 0;
data->T5_msg_size = 0;
data->T6_reportid = 0;
data->T7_address = 0;
data->T9_reportid_min = 0;
data->T9_reportid_max = 0;
data->T15_reportid_min = 0;
data->T15_reportid_max = 0;
data->T18_address = 0;
data->T19_reportid = 0;
data->T42_reportid_min = 0;
data->T42_reportid_max = 0;
data->T44_address = 0;
data->T48_reportid = 0;
data->T63_reportid_min = 0;
data->T63_reportid_max = 0;
data->T100_reportid_min = 0;
data->T100_reportid_max = 0;
data->max_reportid = 0;
}
static int mxt_parse_object_table(struct mxt_data *data)
{
struct i2c_client *client = data->client;
int i;
u8 reportid;
u16 end_address;
/* Valid Report IDs start counting from 1 */
reportid = 1;
data->mem_size = 0;
for (i = 0; i < data->info->object_num; i++) {
struct mxt_object *object = data->object_table + i;
u8 min_id, max_id;
le16_to_cpus(&object->start_address);
if (object->num_report_ids) {
min_id = reportid;
reportid += object->num_report_ids *
mxt_obj_instances(object);
max_id = reportid - 1;
} else {
min_id = 0;
max_id = 0;
}
dev_dbg(&data->client->dev,
"T%u Start:%u Size:%u Instances:%u Report IDs:%u-%u\n",
object->type, object->start_address,
mxt_obj_size(object), mxt_obj_instances(object),
min_id, max_id);
switch (object->type) {
case MXT_GEN_MESSAGE_T5:
if (data->info->family_id == 0x80) {
/* On mXT224 read and discard unused CRC byte
* otherwise DMA reads are misaligned */
data->T5_msg_size = mxt_obj_size(object);
} else {
/* CRC not enabled, so skip last byte */
data->T5_msg_size = mxt_obj_size(object) - 1;
}
data->T5_address = object->start_address;
case MXT_GEN_COMMAND_T6:
data->T6_reportid = min_id;
data->T6_address = object->start_address;
break;
case MXT_GEN_POWER_T7:
data->T7_address = object->start_address;
break;
case MXT_TOUCH_MULTI_T9:
/* Only handle messages from first T9 instance */
data->T9_reportid_min = min_id;
data->T9_reportid_max = min_id +
object->num_report_ids - 1;
data->num_touchids = object->num_report_ids;
break;
case MXT_TOUCH_KEYARRAY_T15:
data->T15_reportid_min = min_id;
data->T15_reportid_max = max_id;
break;
case MXT_SPT_COMMSCONFIG_T18:
data->T18_address = object->start_address;
break;
case MXT_PROCI_TOUCHSUPPRESSION_T42:
data->T42_reportid_min = min_id;
data->T42_reportid_max = max_id;
break;
case MXT_SPT_MESSAGECOUNT_T44:
data->T44_address = object->start_address;
break;
case MXT_SPT_GPIOPWM_T19:
data->T19_reportid = min_id;
break;
case MXT_PROCG_NOISESUPPRESSION_T48:
data->T48_reportid = min_id;
break;
case MXT_PROCI_ACTIVE_STYLUS_T63:
/* Only handle messages from first T63 instance */
data->T63_reportid_min = min_id;
data->T63_reportid_max = min_id;
data->num_stylusids = 1;
break;
case MXT_TOUCH_MULTITOUCHSCREEN_T100:
data->T100_reportid_min = min_id;
data->T100_reportid_max = max_id;
/* first two report IDs reserved */
data->num_touchids = object->num_report_ids - 2;
break;
}
end_address = object->start_address
+ mxt_obj_size(object) * mxt_obj_instances(object) - 1;
if (end_address >= data->mem_size)
data->mem_size = end_address + 1;
}
/* Store maximum reportid */
data->max_reportid = reportid;
/* If T44 exists, T5 position has to be directly after */
if (data->T44_address && (data->T5_address != data->T44_address + 1)) {
dev_err(&client->dev, "Invalid T44 position\n");
return -EINVAL;
}
data->msg_buf = kcalloc(data->max_reportid,
data->T5_msg_size, GFP_KERNEL);
if (!data->msg_buf) {
dev_err(&client->dev, "Failed to allocate message buffer\n");
return -ENOMEM;
}
return 0;
}
static int mxt_read_info_block(struct mxt_data *data)
{
struct i2c_client *client = data->client;
int error;
u16 size;
void *buf;
uint8_t num_objects;
u32 calculated_crc;
u8 *crc_ptr;
/* If info block already allocated, free it */
if (data->raw_info_block != NULL)
mxt_free_object_table(data);
/* Read 7-byte ID information block starting at address 0 */
size = sizeof(struct mxt_info);
buf = kzalloc(size, GFP_KERNEL);
if (!buf) {
dev_err(&client->dev, "Failed to allocate memory\n");
return -ENOMEM;
}
error = __mxt_read_reg(client, 0, size, buf);
if (error)
goto err_free_mem;
/* Resize buffer to give space for rest of info block */
num_objects = ((struct mxt_info *)buf)->object_num;
size += (num_objects * sizeof(struct mxt_object))
+ MXT_INFO_CHECKSUM_SIZE;
buf = krealloc(buf, size, GFP_KERNEL);
if (!buf) {
dev_err(&client->dev, "Failed to allocate memory\n");
error = -ENOMEM;
goto err_free_mem;
}
/* Read rest of info block */
error = __mxt_read_reg(client, MXT_OBJECT_START,
size - MXT_OBJECT_START,
buf + MXT_OBJECT_START);
if (error)
goto err_free_mem;
/* Extract & calculate checksum */
crc_ptr = buf + size - MXT_INFO_CHECKSUM_SIZE;
data->info_crc = crc_ptr[0] | (crc_ptr[1] << 8) | (crc_ptr[2] << 16);
calculated_crc = mxt_calculate_crc(buf, 0,
size - MXT_INFO_CHECKSUM_SIZE);
/* CRC mismatch can be caused by data corruption due to I2C comms
* issue or else device is not using Object Based Protocol */
if ((data->info_crc == 0) || (data->info_crc != calculated_crc)) {
dev_err(&client->dev,
"Info Block CRC error calculated=0x%06X read=0x%06X\n",
data->info_crc, calculated_crc);
if (!data->pdata->ignore_crc)
goto err_free_mem;
}
/* Save pointers in device data structure */
data->raw_info_block = buf;
data->info = (struct mxt_info *)buf;
data->object_table = (struct mxt_object *)(buf + MXT_OBJECT_START);
/* Parse object table information */
error = mxt_parse_object_table(data);
if (error) {
dev_err(&client->dev, "Error %d reading object table\n", error);
goto err_free_obj_table;
}
error = mxt_update_cfg_version(data);
if (error)
goto err_free_obj_table;
dev_info(&client->dev,
"Family: %u Variant: %u Firmware V%u.%u.%02X Objects: %u cfg version: %d.%d.%d\n",
data->info->family_id, data->info->variant_id,
data->info->version >> 4, data->info->version & 0xf,
data->info->build, data->info->object_num,
data->cfg_version[0], data->cfg_version[1],
data->cfg_version[2]);
return 0;
err_free_obj_table:
mxt_free_object_table(data);
err_free_mem:
kfree(buf);
return error;
}
static int mxt_pinctrl_init(struct mxt_data *data)
{
int error;
/* Get pinctrl if target uses pinctrl */
data->ts_pinctrl = devm_pinctrl_get((&data->client->dev));
if (IS_ERR_OR_NULL(data->ts_pinctrl)) {
dev_dbg(&data->client->dev,
"Device does not use pinctrl\n");
error = PTR_ERR(data->ts_pinctrl);
data->ts_pinctrl = NULL;
return error;
}
data->gpio_state_active
= pinctrl_lookup_state(data->ts_pinctrl, "pmx_ts_active");
if (IS_ERR_OR_NULL(data->gpio_state_active)) {
dev_dbg(&data->client->dev,
"Can not get ts default pinstate\n");
error = PTR_ERR(data->gpio_state_active);
data->ts_pinctrl = NULL;
return error;
}
data->gpio_state_suspend
= pinctrl_lookup_state(data->ts_pinctrl, "pmx_ts_suspend");
if (IS_ERR_OR_NULL(data->gpio_state_suspend)) {
dev_dbg(&data->client->dev,
"Can not get ts sleep pinstate\n");
error = PTR_ERR(data->gpio_state_suspend);
data->ts_pinctrl = NULL;
return error;
}
return 0;
}
static int mxt_pinctrl_select(struct mxt_data *data, bool on)
{
struct pinctrl_state *pins_state;
int error;
pins_state = on ? data->gpio_state_active
: data->gpio_state_suspend;
if (!IS_ERR_OR_NULL(pins_state)) {
error = pinctrl_select_state(data->ts_pinctrl, pins_state);
if (error) {
dev_err(&data->client->dev,
"can not set %s pins\n",
on ? "pmx_ts_active" : "pmx_ts_suspend");
return error;
}
} else {
dev_err(&data->client->dev,
"not a valid '%s' pinstate\n",
on ? "pmx_ts_active" : "pmx_ts_suspend");
}
return 0;
}
static int mxt_gpio_enable(struct mxt_data *data, bool enable)
{
const struct mxt_platform_data *pdata = data->pdata;
int error;
if (data->ts_pinctrl) {
error = mxt_pinctrl_select(data, enable);
if (error < 0)
return error;
}
if (enable) {
if (gpio_is_valid(pdata->gpio_irq)) {
error = gpio_request(pdata->gpio_irq,
"maxtouch_gpio_irq");
if (error) {
dev_err(&data->client->dev,
"unable to request %d gpio(%d)\n",
pdata->gpio_irq, error);
return error;
}
error = gpio_direction_input(pdata->gpio_irq);
if (error) {
dev_err(&data->client->dev,
"unable to set dir for %d gpio(%d)\n",
data->pdata->gpio_irq, error);
goto err_free_irq;
}
} else {
dev_err(&data->client->dev, "irq gpio not provided\n");
return -EINVAL;
}
if (gpio_is_valid(pdata->gpio_reset)) {
error = gpio_request(pdata->gpio_reset,
"maxtouch_gpio_reset");
if (error) {
dev_err(&data->client->dev,
"unable to request %d gpio(%d)\n",
pdata->gpio_reset, error);
goto err_free_irq;
}
error = gpio_direction_output(pdata->gpio_reset, 0);
if (error) {
dev_err(&data->client->dev,
"unable to set dir for %d gpio(%d)\n",
pdata->gpio_reset, error);
goto err_free_reset;
}
} else {
dev_err(&data->client->dev,
"reset gpio not provided\n");
goto err_free_irq;
}
if (gpio_is_valid(pdata->gpio_i2cmode)) {
error = gpio_request(pdata->gpio_i2cmode,
"maxtouch_gpio_i2cmode");
if (error) {
dev_err(&data->client->dev,
"unable to request %d gpio (%d)\n",
pdata->gpio_i2cmode, error);
goto err_free_reset;
}
error = gpio_direction_output(pdata->gpio_i2cmode, 1);
if (error) {
dev_err(&data->client->dev,
"unable to set dir for %d gpio (%d)\n",
pdata->gpio_i2cmode, error);
goto err_free_i2cmode;
}
} else {
dev_info(&data->client->dev,
"i2cmode gpio is not used\n");
}
} else {
if (gpio_is_valid(pdata->gpio_irq))
gpio_free(pdata->gpio_irq);
if (gpio_is_valid(pdata->gpio_reset)) {
gpio_free(pdata->gpio_reset);
}
if (gpio_is_valid(pdata->gpio_i2cmode)) {
gpio_set_value(pdata->gpio_i2cmode, 0);
gpio_free(pdata->gpio_i2cmode);
}
}
return 0;
err_free_i2cmode:
if (gpio_is_valid(pdata->gpio_i2cmode)) {
gpio_set_value(pdata->gpio_i2cmode, 0);
gpio_free(pdata->gpio_i2cmode);
}
err_free_reset:
if (gpio_is_valid(pdata->gpio_reset)) {
gpio_free(pdata->gpio_reset);
}
err_free_irq:
if (gpio_is_valid(pdata->gpio_irq))
gpio_free(pdata->gpio_irq);
return error;
}
static int mxt_regulator_enable(struct mxt_data *data)
{
int error;
if (!data->use_regulator)
return 0;
gpio_set_value(data->pdata->gpio_reset, 0);
error = regulator_enable(data->reg_vdd);
if (error) {
dev_err(&data->client->dev,
"vdd enable failed, error=%d\n", error);
return error;
}
error = regulator_enable(data->reg_avdd);
if (error) {
dev_err(&data->client->dev,
"avdd enable failed, error=%d\n", error);
goto err_dis_vdd;
}
if (!IS_ERR(data->reg_xvdd)) {
error = regulator_enable(data->reg_xvdd);
if (error) {
dev_err(&data->client->dev,
"xvdd enable failed, error=%d\n", error);
goto err_dis_avdd;
}
}
msleep(MXT_REGULATOR_DELAY);
reinit_completion(&data->bl_completion);
gpio_set_value(data->pdata->gpio_reset, 1);
mxt_wait_for_completion(data, &data->bl_completion, MXT_POWERON_DELAY);
return 0;
err_dis_avdd:
regulator_disable(data->reg_avdd);
err_dis_vdd:
regulator_disable(data->reg_vdd);
return error;
}
static void mxt_regulator_disable(struct mxt_data *data)
{
regulator_disable(data->reg_vdd);
regulator_disable(data->reg_avdd);
if (!IS_ERR(data->reg_xvdd))
regulator_disable(data->reg_xvdd);
}
static int mxt_regulator_configure(struct mxt_data *data, bool state)
{
struct device *dev = &data->client->dev;
struct device_node *np = dev->of_node;
struct property *prop;
int error = 0;
/* According to maXTouch power sequencing specification, RESET line
* must be kept low until some time after regulators come up to
* voltage */
if (!data->pdata->gpio_reset) {
dev_warn(dev, "Must have reset GPIO to use regulator support\n");
return 0;
}
if (!state)
goto deconfig;
data->reg_vdd = regulator_get(dev, "vdd");
if (IS_ERR(data->reg_vdd)) {
error = PTR_ERR(data->reg_vdd);
dev_err(dev, "Error %d getting vdd regulator\n", error);
return error;
}
if (regulator_count_voltages(data->reg_vdd) > 0) {
error = regulator_set_voltage(data->reg_vdd,
MXT_VDD_VTG_MIN_UV, MXT_VDD_VTG_MAX_UV);
if (error) {
dev_err(&data->client->dev,
"vdd set_vtg failed err=%d\n", error);
goto fail_put_vdd;
}
}
data->reg_avdd = regulator_get(dev, "avdd");
if (IS_ERR(data->reg_avdd)) {
error = PTR_ERR(data->reg_avdd);
dev_err(dev, "Error %d getting avdd regulator\n", error);
goto fail_put_vdd;
}
if (regulator_count_voltages(data->reg_avdd) > 0) {
error = regulator_set_voltage(data->reg_avdd,
MXT_AVDD_VTG_MIN_UV, MXT_AVDD_VTG_MAX_UV);
if (error) {
dev_err(&data->client->dev,
"avdd set_vtg failed err=%d\n", error);
goto fail_put_avdd;
}
}
data->reg_xvdd = regulator_get(dev, "xvdd");
if (IS_ERR(data->reg_xvdd)) {
error = PTR_ERR(data->reg_xvdd);
prop = of_find_property(np, "xvdd-supply", NULL);
if (prop && (error == -EPROBE_DEFER))
return -EPROBE_DEFER;
dev_info(dev, "xvdd regulator is not used\n");
} else {
if (regulator_count_voltages(data->reg_xvdd) > 0) {
error = regulator_set_voltage(data->reg_xvdd,
MXT_XVDD_VTG_MIN_UV, MXT_XVDD_VTG_MAX_UV);
if (error)
dev_err(&data->client->dev,
"xvdd set_vtg failed err=%d\n", error);
}
}
data->use_regulator = true;
dev_dbg(dev, "Initialised regulators\n");
return 0;
deconfig:
if (!IS_ERR(data->reg_xvdd))
regulator_put(data->reg_xvdd);
fail_put_avdd:
regulator_put(data->reg_avdd);
fail_put_vdd:
regulator_put(data->reg_vdd);
return error;
}
#if defined(CONFIG_SECURE_TOUCH)
static void mxt_secure_touch_stop(struct mxt_data *data, int blocking)
{
if (atomic_read(&data->st_enabled)) {
atomic_set(&data->st_pending_irqs, -1);
mxt_secure_touch_notify(data);
if (blocking)
wait_for_completion_interruptible(&data->st_powerdown);
}
}
#else
static void mxt_secure_touch_stop(struct mxt_data *data, int blocking)
{
}
#endif
static void mxt_start(struct mxt_data *data)
{
if (!data->suspended || data->in_bootloader)
return;
mxt_secure_touch_stop(data, 1);
/* enable gpios */
mxt_gpio_enable(data, true);
/* enable regulators */
mxt_regulator_enable(data);
/* Discard any messages still in message buffer from before
* chip went to sleep */
mxt_process_messages_until_invalid(data);
mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
/* Recalibrate since chip has been in deep sleep */
mxt_t6_command(data, MXT_COMMAND_CALIBRATE, 1, false);
mxt_acquire_irq(data);
data->enable_reporting = true;
data->suspended = false;
}
static void mxt_reset_slots(struct mxt_data *data)
{
struct input_dev *input_dev = data->input_dev;
unsigned int num_mt_slots;
int id;
num_mt_slots = data->num_touchids + data->num_stylusids;
for (id = 0; id < num_mt_slots; id++) {
input_mt_slot(input_dev, id);
input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 0);
}
mxt_input_sync(input_dev);
}
static void mxt_stop(struct mxt_data *data)
{
if (data->suspended || data->in_bootloader)
return;
mxt_secure_touch_stop(data, 1);
data->enable_reporting = false;
disable_irq(data->irq);
/* put in deep sleep */
mxt_set_t7_power_cfg(data, MXT_POWER_CFG_DEEPSLEEP);
/* disable regulators */
mxt_regulator_disable(data);
/* disable gpios */
mxt_gpio_enable(data, false);
mxt_reset_slots(data);
data->suspended = true;
}
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_create_input_dev(struct mxt_data *data)
{
struct device *dev = &data->client->dev;
struct input_dev *input_dev;
int error;
unsigned int num_mt_slots;
int i;
if (data->T9_reportid_min) {
error = mxt_update_t9_resolution(data);
if (error) {
dev_err(dev, "update resolution failed\n");
return error;
}
} else if (data->T100_reportid_min) {
error = mxt_update_t100_resolution(data);
if (error) {
dev_err(dev, "update resolution failed\n");
return error;
}
} else {
dev_warn(dev, "No touch object detected\n");
}
input_dev = input_allocate_device();
if (!input_dev) {
dev_err(dev, "Failed to allocate memory\n");
return -ENOMEM;
}
input_dev->name = "Atmel maXTouch Touchscreen";
input_dev->phys = data->phys;
input_dev->id.bustype = BUS_I2C;
input_dev->dev.parent = dev;
input_dev->open = mxt_input_open;
input_dev->close = mxt_input_close;
__set_bit(EV_ABS, input_dev->evbit);
__set_bit(EV_KEY, input_dev->evbit);
__set_bit(BTN_TOUCH, input_dev->keybit);
__set_bit(INPUT_PROP_DIRECT, input_dev->propbit);
num_mt_slots = data->num_touchids + data->num_stylusids;
error = input_mt_init_slots(input_dev, num_mt_slots, 0);
if (error) {
dev_err(dev, "Error %d initialising slots\n", error);
goto err_free_mem;
}
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,
data->pdata->disp_minx, data->pdata->disp_maxx,
0, 0);
input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
data->pdata->disp_miny, data->pdata->disp_maxy,
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) {
input_set_capability(input_dev, EV_KEY, BTN_STYLUS);
input_set_capability(input_dev, EV_KEY, BTN_STYLUS2);
input_set_abs_params(input_dev, ABS_MT_TOOL_TYPE,
0, MT_TOOL_MAX, 0, 0);
}
/* For T15 key array */
if (data->pdata->key_codes && data->T15_reportid_min) {
data->t15_keystatus = 0;
for (i = 0; i < data->pdata->t15_num_keys; i++)
input_set_capability(input_dev, EV_KEY,
data->pdata->t15_keymap[i]);
}
input_set_drvdata(input_dev, data);
error = input_register_device(input_dev);
if (error) {
dev_err(dev, "Error %d registering input device\n", error);
goto err_free_mem;
}
data->input_dev = input_dev;
return 0;
err_free_mem:
input_free_device(input_dev);
return error;
}
static int mxt_configure_objects(struct mxt_data *data)
{
struct i2c_client *client = data->client;
int error;
error = mxt_debug_msg_init(data);
if (error)
return error;
error = mxt_init_t7_power_cfg(data);
if (error)
dev_dbg(&client->dev, "Failed to initialize power cfg\n");
return 0;
}
#ifdef CONFIG_OF
static int mxt_get_dt_coords(struct device *dev, char *name,
struct mxt_platform_data *pdata)
{
u32 coords[MXT_COORDS_ARR_SIZE];
struct property *prop;
struct device_node *np = dev->of_node;
size_t coords_size;
int error;
prop = of_find_property(np, name, NULL);
if (!prop)
return -EINVAL;
if (!prop->value)
return -ENODATA;
coords_size = prop->length / sizeof(u32);
if (coords_size != MXT_COORDS_ARR_SIZE) {
dev_err(dev, "invalid %s\n", name);
return -EINVAL;
}
error = of_property_read_u32_array(np, name, coords, coords_size);
if (error && (error != -EINVAL)) {
dev_err(dev, "Unable to read %s\n", name);
return error;
}
if (strcmp(name, "atmel,panel-coords") == 0) {
pdata->panel_minx = coords[0];
pdata->panel_miny = coords[1];
pdata->panel_maxx = coords[2];
pdata->panel_maxy = coords[3];
} else if (strcmp(name, "atmel,display-coords") == 0) {
pdata->disp_minx = coords[0];
pdata->disp_miny = coords[1];
pdata->disp_maxx = coords[2];
pdata->disp_maxy = coords[3];
} else {
dev_err(dev, "unsupported property %s\n", name);
return -EINVAL;
}
return 0;
}
static int mxt_search_fw_name(struct mxt_data *data)
{
struct device *dev = &data->client->dev;
struct device_node *np = dev->of_node, *temp;
u32 temp_val; size_t len;
int rc;
data->fw_name[0] = '\0';
if (data->in_bootloader)
return 0;
for_each_child_of_node(np, temp) {
rc = of_property_read_u32(temp, "atmel,version", &temp_val);
if (rc) {
dev_err(dev, "Unable to read controller version\n");
return rc;
}
if (temp_val != data->info->version)
continue;
rc = of_property_read_u32(temp, "atmel,build", &temp_val);
if (rc) {
dev_err(dev, "Unable to read build id\n");
return rc;
}
if (temp_val != data->info->build)
continue;
rc = of_property_read_string(temp, "atmel,fw-name",
&data->pdata->fw_name);
if (rc && (rc != -EINVAL)) {
dev_err(dev, "Unable to read fw name\n");
return rc;
}
dev_dbg(dev, "fw name found(%s)\n", data->pdata->fw_name);
if (data->pdata->fw_name) {
len = strlen(data->pdata->fw_name);
if (len > MXT_NAME_MAX_LEN - 1) {
dev_err(dev, "Invalid firmware name\n");
return -EINVAL;
}
strlcpy(data->fw_name, data->pdata->fw_name, len + 1);
}
}
return 0;
}
static int mxt_parse_dt(struct device *dev, struct mxt_platform_data *pdata)
{
int error;
u32 temp_val;
struct device_node *np = dev->of_node;
struct property *prop;
error = mxt_get_dt_coords(dev, "atmel,panel-coords", pdata);
if (error)
return error;
error = mxt_get_dt_coords(dev, "atmel,display-coords", pdata);
if (error)
return error;
pdata->cfg_name = MXT_GEN_CFG;
error = of_property_read_string(np, "atmel,cfg-name", &pdata->cfg_name);
if (error && (error != -EINVAL)) {
dev_err(dev, "Unable to read cfg name\n");
return error;
}
/* reset, irq gpio info */
pdata->gpio_reset = of_get_named_gpio_flags(np, "atmel,reset-gpio",
0, &temp_val);
pdata->resetflags = temp_val;
pdata->gpio_irq = of_get_named_gpio_flags(np, "atmel,irq-gpio",
0, &temp_val);
pdata->irqflags = temp_val;
pdata->gpio_i2cmode = of_get_named_gpio_flags(np, "atmel,i2cmode-gpio",
0, &temp_val);
pdata->ignore_crc = of_property_read_bool(np, "atmel,ignore-crc");
error = of_property_read_u32(np, "atmel,bl-addr", &temp_val);
if (error && (error != -EINVAL))
dev_err(dev, "Unable to read bootloader address\n");
else if (error != -EINVAL)
pdata->bl_addr = (u8) temp_val;
/* keycodes for keyarray object */
prop = of_find_property(np, "atmel,key-codes", NULL);
if (prop) {
pdata->key_codes = devm_kzalloc(dev,
sizeof(int) * MXT_KEYARRAY_MAX_KEYS,
GFP_KERNEL);
if (!pdata->key_codes)
return -ENOMEM;
if ((prop->length/sizeof(u32)) == MXT_KEYARRAY_MAX_KEYS) {
error = of_property_read_u32_array(np,
"atmel,key-codes", pdata->key_codes,
MXT_KEYARRAY_MAX_KEYS);
if (error) {
dev_err(dev, "Unable to read key codes\n");
return error;
}
} else
return -EINVAL;
}
return 0;
}
#else
static int mxt_parse_dt(struct device *dev, struct mxt_platform_data *pdata)
{
return -ENODEV;
}
static int mxt_search_fw_name(struct mxt_data *data)
{
return -ENODEV;
}
#endif
static int mxt_initialize(struct mxt_data *data)
{
struct i2c_client *client = data->client;
int error;
bool alt_bootloader_addr = false;
bool retry = false;
retry_info:
error = mxt_read_info_block(data);
if (error) {
retry_bootloader:
error = mxt_probe_bootloader(data, alt_bootloader_addr);
if (error) {
if (alt_bootloader_addr) {
/* Chip is not in appmode or bootloader mode */
return error;
}
dev_info(&client->dev, "Trying alternate bootloader address\n");
alt_bootloader_addr = true;
goto retry_bootloader;
} else {
if (retry) {
dev_err(&client->dev,
"Could not recover device from "
"bootloader mode\n");
/* this is not an error state, we can reflash
* from here */
data->in_bootloader = true;
goto recover_bootloader;
}
/* Attempt to exit bootloader into app mode */
mxt_send_bootloader_cmd(data, false);
msleep(MXT_FW_RESET_TIME);
retry = true;
goto retry_info;
}
}
error = mxt_check_retrigen(data);
if (error)
return error;
error = mxt_acquire_irq(data);
if (error)
return error;
error = mxt_configure_objects(data);
if (error)
return error;
recover_bootloader:
error = mxt_create_input_dev(data);
if (error) {
dev_err(&client->dev, "Failed to create input dev\n");
return error;
}
data->enable_reporting = true;
error = mxt_search_fw_name(data);
if (error)
dev_dbg(&client->dev, "firmware name search fail\n");
return 0;
}
/* Firmware Version is returned as Major.Minor.Build */
static ssize_t mxt_fw_version_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct mxt_data *data = dev_get_drvdata(dev);
return scnprintf(buf, PAGE_SIZE, "%u.%u.%02X\n",
data->info->version >> 4, data->info->version & 0xf,
data->info->build);
}
/* Hardware Version is returned as FamilyID.VariantID */
static ssize_t mxt_hw_version_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct mxt_data *data = dev_get_drvdata(dev);
return scnprintf(buf, PAGE_SIZE, "%u.%u\n",
data->info->family_id, data->info->variant_id);
}
/* Hardware Version is returned as FamilyID.VariantID */
static ssize_t mxt_cfg_version_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct mxt_data *data = dev_get_drvdata(dev);
return scnprintf(buf, PAGE_SIZE, "%u.%u.%u\n",
data->cfg_version[0], data->cfg_version[1],
data->cfg_version[2]);
}
static ssize_t mxt_show_instance(char *buf, int count,
struct mxt_object *object, int instance,
const u8 *val)
{
int i;
if (mxt_obj_instances(object) > 1)
count += scnprintf(buf + count, PAGE_SIZE - count,
"Instance %u\n", instance);
for (i = 0; i < mxt_obj_size(object); i++)
count += scnprintf(buf + count, PAGE_SIZE - count,
"\t[%2u]: %02x (%d)\n", i, val[i], val[i]);
count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
return count;
}
static ssize_t mxt_object_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct mxt_data *data = dev_get_drvdata(dev);
struct mxt_object *object;
int count = 0;
int i, j;
int error;
u8 *obuf;
/* Pre-allocate buffer large enough to hold max sized object. */
obuf = kmalloc(256, GFP_KERNEL);
if (!obuf)
return -ENOMEM;
error = 0;
for (i = 0; i < data->info->object_num; i++) {
object = data->object_table + i;
if (!mxt_object_readable(object->type))
continue;
count += scnprintf(buf + count, PAGE_SIZE - count,
"T%u:\n", object->type);
for (j = 0; j < mxt_obj_instances(object); j++) {
u16 size = mxt_obj_size(object);
u16 addr = object->start_address + j * size;
error = __mxt_read_reg(data->client, addr, size, obuf);
if (error)
goto done;
count = mxt_show_instance(buf, count, object, j, obuf);
}
}
done:
kfree(obuf);
return error ?: count;
}
static int mxt_check_firmware_format(struct device *dev,
const struct firmware *fw)
{
unsigned int pos = 0;
char c;
while (pos < fw->size) {
c = *(fw->data + pos);
if (c < '0' || (c > '9' && c < 'A') || c > 'F')
return 0;
pos++;
}
/* To convert file try
* xxd -r -p mXTXXX__APP_VX-X-XX.enc > maxtouch.fw */
dev_err(dev, "Aborting: firmware file must be in binary format\n");
return -1;
}
static int mxt_load_fw(struct device *dev)
{
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, data->fw_name, dev);
if (ret) {
dev_err(dev, "Unable to open firmware %s\n", data->fw_name);
return ret;
}
/* Check for incorrect enc file */
ret = mxt_check_firmware_format(dev, fw);
if (ret)
goto release_firmware;
if (data->suspended) {
if (data->use_regulator)
mxt_regulator_enable(data);
enable_irq(data->irq);
data->suspended = false;
}
if (!data->in_bootloader) {
/* Change to the bootloader mode */
data->in_bootloader = true;
ret = mxt_t6_command(data, MXT_COMMAND_RESET,
MXT_BOOT_VALUE, false);
if (ret)
goto release_firmware;
msleep(MXT_RESET_TIME);
/* At this stage, do not need to scan since we know
* family ID */
ret = mxt_lookup_bootloader_address(data, 0);
if (ret)
goto release_firmware;
} else {
enable_irq(data->irq);
}
mxt_free_object_table(data);
reinit_completion(&data->bl_completion);
ret = mxt_check_bootloader(data, MXT_WAITING_BOOTLOAD_CMD, false);
if (ret) {
/* Bootloader may still be unlocked from previous update
* attempt */
ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, false);
if (ret)
goto disable_irq;
} else {
dev_info(dev, "Unlocking bootloader\n");
/* Unlock bootloader */
ret = mxt_send_bootloader_cmd(data, true);
if (ret)
goto disable_irq;
}
while (pos < fw->size) {
ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, true);
if (ret)
goto disable_irq;
frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
/* Take account of CRC bytes */
frame_size += 2;
/* Write one frame to device */
ret = mxt_bootloader_write(data, fw->data + pos, frame_size);
if (ret)
goto disable_irq;
ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS, true);
if (ret) {
retry++;
/* Back off by 20ms per retry */
msleep(retry * 20);
if (retry > 20) {
dev_err(dev, "Retry count exceeded\n");
goto disable_irq;
}
} else {
retry = 0;
pos += frame_size;
frame++;
}
if (frame % 50 == 0)
dev_info(dev, "Sent %d frames, %d/%zd bytes\n",
frame, pos, fw->size);
}
/* Wait for flash. */
ret = mxt_wait_for_completion(data, &data->bl_completion,
MXT_FW_RESET_TIME);
if (ret)
goto disable_irq;
dev_info(dev, "Sent %d frames, %u bytes\n", frame, pos);
/* Wait for device to reset. Some bootloader versions do not assert
* the CHG line after bootloading has finished, so ignore error */
mxt_wait_for_completion(data, &data->bl_completion,
MXT_FW_RESET_TIME);
data->in_bootloader = false;
disable_irq:
disable_irq(data->irq);
release_firmware:
release_firmware(fw);
return ret;
}
static ssize_t mxt_update_fw_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct mxt_data *data = dev_get_drvdata(dev);
int error;
if (data->fw_name[0] == '\0') {
if (data->in_bootloader)
dev_info(dev, "Manual update needed\n");
else
dev_info(dev, "firmware is up-to-date\n");
return count;
}
error = mxt_load_fw(dev);
if (error) {
dev_err(dev, "The firmware update failed(%d)\n", error);
count = error;
} else {
dev_info(dev, "The firmware update succeeded\n");
msleep(MXT_FW_RESET_TIME);
data->suspended = false;
error = mxt_initialize(data);
if (error)
return error;
data->fw_w_no_cfg_update = true;
}
return count;
}
static int mxt_update_cfg(struct mxt_data *data, bool force)
{
int ret;
if (data->in_bootloader) {
dev_err(&data->client->dev, "Not in appmode\n");
return -EINVAL;
}
data->enable_reporting = false;
if (data->suspended) {
if (data->use_regulator)
mxt_regulator_enable(data);
mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
mxt_acquire_irq(data);
data->suspended = false;
}
/* load config */
ret = mxt_load_cfg(data, force);
if (ret)
return ret;
return 0;
}
static ssize_t mxt_update_cfg_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct mxt_data *data = dev_get_drvdata(dev);
int ret;
/* update config */
ret = mxt_update_cfg(data, false);
if (ret)
return ret;
return count;
}
static ssize_t mxt_force_update_cfg_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct mxt_data *data = dev_get_drvdata(dev);
int ret;
/* update force config */
ret = mxt_update_cfg(data, true);
if (ret)
return ret;
return count;
}
static ssize_t mxt_debug_enable_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct mxt_data *data = dev_get_drvdata(dev);
char c;
c = data->debug_enabled ? '1' : '0';
return scnprintf(buf, PAGE_SIZE, "%c\n", c);
}
static ssize_t mxt_debug_notify_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "0\n");
}
static ssize_t mxt_debug_v2_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) {
if (i == 1)
mxt_debug_msg_enable(data);
else
mxt_debug_msg_disable(data);
return count;
} else {
dev_dbg(dev, "debug_enabled write error\n");
return -EINVAL;
}
}
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 (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_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_reg(data->client, off, count, buf);
return ret == 0 ? count : 0;
}
#if defined(CONFIG_SECURE_TOUCH)
static int mxt_secure_touch_clk_prepare_enable(
struct mxt_data *data)
{
int ret;
ret = clk_prepare_enable(data->iface_clk);
if (ret) {
dev_err(&data->client->dev,
"error on clk_prepare_enable(iface_clk):%d\n", ret);
return ret;
}
ret = clk_prepare_enable(data->core_clk);
if (ret) {
clk_disable_unprepare(data->iface_clk);
dev_err(&data->client->dev,
"error clk_prepare_enable(core_clk):%d\n", ret);
}
return ret;
}
static void mxt_secure_touch_clk_disable_unprepare(
struct mxt_data *data)
{
clk_disable_unprepare(data->core_clk);
clk_disable_unprepare(data->iface_clk);
}
static ssize_t mxt_secure_touch_enable_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct mxt_data *data = dev_get_drvdata(dev);
return scnprintf(buf, PAGE_SIZE, "%d", atomic_read(&data->st_enabled));
}
/*
* Accept only "0" and "1" valid values.
* "0" will reset the st_enabled flag, then wake up the reading process.
* The bus driver is notified via pm_runtime that it is not required to stay
* awake anymore.
* It will also make sure the queue of events is emptied in the controller,
* in case a touch happened in between the secure touch being disabled and
* the local ISR being ungated.
* "1" will set the st_enabled flag and clear the st_pending_irqs flag.
* The bus driver is requested via pm_runtime to stay awake.
*/
static ssize_t mxt_secure_touch_enable_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct mxt_data *data = dev_get_drvdata(dev);
struct device *adapter = data->client->adapter->dev.parent;
unsigned long value;
int err = 0;
if (count > 2)
return -EINVAL;
err = kstrtoul(buf, 10, &value);
if (err != 0)
return err;
if (!data->st_initialized)
return -EIO;
err = count;
switch (value) {
case 0:
if (atomic_read(&data->st_enabled) == 0)
break;
mxt_secure_touch_clk_disable_unprepare(data);
pm_runtime_put_sync(adapter);
atomic_set(&data->st_enabled, 0);
mxt_secure_touch_notify(data);
mxt_interrupt(data->client->irq, data);
complete(&data->st_powerdown);
break;
case 1:
if (atomic_read(&data->st_enabled)) {
err = -EBUSY;
break;
}
if (pm_runtime_get_sync(adapter) < 0) {
dev_err(&data->client->dev, "pm_runtime_get failed\n");
err = -EIO;
break;
}
if (mxt_secure_touch_clk_prepare_enable(data) < 0) {
pm_runtime_put_sync(adapter);
err = -EIO;
break;
}
reinit_completion(&data->st_powerdown);
atomic_set(&data->st_enabled, 1);
synchronize_irq(data->client->irq);
atomic_set(&data->st_pending_irqs, 0);
break;
default:
dev_err(&data->client->dev, "unsupported value: %lu\n", value);
err = -EINVAL;
break;
}
return err;
}
static ssize_t mxt_secure_touch_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct mxt_data *data = dev_get_drvdata(dev);
int val = 0;
if (atomic_read(&data->st_enabled) == 0)
return -EBADF;
if (atomic_cmpxchg(&data->st_pending_irqs, -1, 0) == -1)
return -EINVAL;
if (atomic_cmpxchg(&data->st_pending_irqs, 1, 0) == 1)
val = 1;
return scnprintf(buf, PAGE_SIZE, "%u", val);
}
static DEVICE_ATTR(secure_touch_enable, S_IRUGO | S_IWUSR | S_IWGRP ,
mxt_secure_touch_enable_show,
mxt_secure_touch_enable_store);
static DEVICE_ATTR(secure_touch, S_IRUGO, mxt_secure_touch_show, NULL);
#endif
static ssize_t mxt_fw_name_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct mxt_data *data = dev_get_drvdata(dev);
return snprintf(buf, MXT_NAME_MAX_LEN - 1, "%s\n", data->fw_name);
}
static ssize_t mxt_fw_name_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
struct mxt_data *data = dev_get_drvdata(dev);
if (size > MXT_NAME_MAX_LEN - 1)
return -EINVAL;
strlcpy(data->fw_name, buf, size);
if (data->fw_name[size-1] == '\n')
data->fw_name[size-1] = 0;
return size;
}
static ssize_t mxt_cfg_name_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct mxt_data *data = dev_get_drvdata(dev);
return snprintf(buf, MXT_NAME_MAX_LEN - 1, "%s\n", data->cfg_name);
}
static ssize_t mxt_cfg_name_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
struct mxt_data *data = dev_get_drvdata(dev);
if (size > MXT_NAME_MAX_LEN - 1)
return -EINVAL;
strlcpy(data->cfg_name, buf, size);
if (data->cfg_name[size-1] == '\n')
data->cfg_name[size-1] = 0;
return size;
}
static DEVICE_ATTR(fw_name, S_IWUSR | S_IRUSR,
mxt_fw_name_show, mxt_fw_name_store);
static DEVICE_ATTR(cfg_name, S_IWUSR | S_IRUSR,
mxt_cfg_name_show, mxt_cfg_name_store);
static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL);
static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL);
static DEVICE_ATTR(cfg_version, S_IRUGO, mxt_cfg_version_show, NULL);
static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
static DEVICE_ATTR(update_cfg, S_IWUSR, NULL, mxt_update_cfg_store);
static DEVICE_ATTR(force_update_cfg, S_IWUSR, NULL, mxt_force_update_cfg_store);
static DEVICE_ATTR(debug_v2_enable, S_IWUSR | S_IRUSR, NULL, mxt_debug_v2_enable_store);
static DEVICE_ATTR(debug_notify, S_IRUGO, mxt_debug_notify_show, NULL);
static DEVICE_ATTR(debug_enable, S_IWUSR | S_IRUSR, mxt_debug_enable_show,
mxt_debug_enable_store);
static struct attribute *mxt_attrs[] = {
&dev_attr_fw_name.attr,
&dev_attr_cfg_name.attr,
&dev_attr_fw_version.attr,
&dev_attr_hw_version.attr,
&dev_attr_cfg_version.attr,
&dev_attr_object.attr,
&dev_attr_update_fw.attr,
&dev_attr_update_cfg.attr,
&dev_attr_force_update_cfg.attr,
&dev_attr_debug_enable.attr,
&dev_attr_debug_v2_enable.attr,
&dev_attr_debug_notify.attr,
#if defined(CONFIG_SECURE_TOUCH)
&dev_attr_secure_touch_enable.attr,
&dev_attr_secure_touch.attr,
#endif
NULL
};
static const struct attribute_group mxt_attr_group = {
.attrs = mxt_attrs,
};
#ifdef CONFIG_PM_SLEEP
static int mxt_suspend(struct device *dev)
{
struct mxt_data *data = dev_get_drvdata(dev);
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);
return 0;
}
static int mxt_resume(struct device *dev)
{
struct mxt_data *data = dev_get_drvdata(dev);
struct input_dev *input_dev = data->input_dev;
mxt_secure_touch_stop(data, 1);
mutex_lock(&input_dev->mutex);
if (input_dev->users)
mxt_start(data);
mutex_unlock(&input_dev->mutex);
return 0;
}
#if defined(CONFIG_FB)
static int fb_notifier_callback(struct notifier_block *self,
unsigned long event, void *data)
{
struct fb_event *evdata = data;
int *blank;
struct mxt_data *mxt_dev_data =
container_of(self, struct mxt_data, fb_notif);
if (evdata && evdata->data && mxt_dev_data && mxt_dev_data->client) {
if (event == FB_EARLY_EVENT_BLANK)
mxt_secure_touch_stop(mxt_dev_data, 0);
else if (event == FB_EVENT_BLANK) {
blank = evdata->data;
if (*blank == FB_BLANK_UNBLANK)
mxt_resume(&mxt_dev_data->client->dev);
else if (*blank == FB_BLANK_POWERDOWN)
mxt_suspend(&mxt_dev_data->client->dev);
}
}
return 0;
}
#elif defined(CONFIG_HAS_EARLYSUSPEND)
static void mxt_early_suspend(struct early_suspend *h)
{
struct mxt_data *data = container_of(h, struct mxt_data,
early_suspend);
mxt_suspend(&data->client->dev);
}
static void mxt_late_resume(struct early_suspend *h)
{
struct mxt_data *data = container_of(h, struct mxt_data,
early_suspend);
mxt_resume(&data->client->dev);
}
#endif
static const struct dev_pm_ops mxt_pm_ops = {
#if (!defined(CONFIG_FB) && !defined(CONFIG_HAS_EARLYSUSPEND))
.suspend = mxt_suspend,
.resume = mxt_resume,
#endif
};
#endif
#if defined(CONFIG_SECURE_TOUCH)
static void mxt_secure_touch_init(struct mxt_data *data)
{
int ret = 0;
data->st_initialized = 0;
init_completion(&data->st_powerdown);
/* Get clocks */
data->core_clk = clk_get(&data->client->dev, "core_clk");
if (IS_ERR(data->core_clk)) {
ret = PTR_ERR(data->core_clk);
dev_err(&data->client->dev,
"%s: error on clk_get(core_clk):%d\n", __func__, ret);
return;
}
data->iface_clk = clk_get(&data->client->dev, "iface_clk");
if (IS_ERR(data->iface_clk)) {
ret = PTR_ERR(data->iface_clk);
dev_err(&data->client->dev,
"%s: error on clk_get(iface_clk):%d\n", __func__, ret);
goto err_iface_clk;
}
data->st_initialized = 1;
return;
err_iface_clk:
clk_put(data->core_clk);
data->core_clk = NULL;
}
#else
static void mxt_secure_touch_init(struct mxt_data *data)
{
}
#endif
static int mxt_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct mxt_data *data;
struct mxt_platform_data *pdata;
int error, len;
if (client->dev.of_node) {
pdata = devm_kzalloc(&client->dev,
sizeof(struct mxt_platform_data), GFP_KERNEL);
if (!pdata) {
dev_err(&client->dev, "Failed to allocate memory\n");
return -ENOMEM;
}
error = mxt_parse_dt(&client->dev, pdata);
if (error)
return error;
} else
pdata = client->dev.platform_data;
if (!pdata)
return -EINVAL;
data = devm_kzalloc(&client->dev, sizeof(struct mxt_data), GFP_KERNEL);
if (!data) {
dev_err(&client->dev, "Failed to allocate memory\n");
return -ENOMEM;
}
snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
client->adapter->nr, client->addr);
data->client = client;
data->irq = client->irq;
data->pdata = pdata;
i2c_set_clientdata(client, data);
init_completion(&data->bl_completion);
init_completion(&data->reset_completion);
init_completion(&data->crc_completion);
mutex_init(&data->debug_msg_lock);
if (data->pdata->cfg_name) {
len = strlen(data->pdata->cfg_name);
if (len > MXT_NAME_MAX_LEN - 1) {
dev_err(&client->dev, "Invalid config name\n");
goto err_destroy_mutex;
}
strlcpy(data->cfg_name, data->pdata->cfg_name, len + 1);
}
error = mxt_pinctrl_init(data);
if (error)
dev_info(&client->dev, "No pinctrl support\n");
error = mxt_gpio_enable(data, true);
if (error) {
dev_err(&client->dev, "Failed to configure gpios\n");
goto err_destroy_mutex;
}
data->irq = data->client->irq =
gpio_to_irq(data->pdata->gpio_irq);
error = mxt_regulator_configure(data, true);
if (error) {
dev_err(&client->dev, "Failed to probe regulators\n");
goto err_free_gpios;
}
error = mxt_regulator_enable(data);
if (error) {
dev_err(&client->dev, "Error %d enabling regulators\n", error);
goto err_put_regs;
}
error = mxt_initialize(data);
if (error)
goto err_free_regs;
error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
if (error) {
dev_err(&client->dev, "Failure %d creating sysfs group\n",
error);
goto err_free_object;
}
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;
}
error = request_threaded_irq(data->irq, NULL, mxt_interrupt,
data->pdata->irqflags | IRQF_ONESHOT,
client->name, data);
if (error) {
dev_err(&client->dev, "Failed to register interrupt\n");
goto err_remove_sysfs_group;
}
#if defined(CONFIG_FB)
data->fb_notif.notifier_call = fb_notifier_callback;
error = fb_register_client(&data->fb_notif);
if (error) {
dev_err(&client->dev, "Unable to register fb_notifier: %d\n",
error);
goto err_free_irq;
}
#elif defined(CONFIG_HAS_EARLYSUSPEND)
data->early_suspend.level = EARLY_SUSPEND_LEVEL_BLANK_SCREEN +
MXT_SUSPEND_LEVEL;
data->early_suspend.suspend = mxt_early_suspend;
data->early_suspend.resume = mxt_late_resume;
register_early_suspend(&data->early_suspend);
#endif
mxt_secure_touch_init(data);
return 0;
err_free_irq:
free_irq(data->irq, data);
err_remove_sysfs_group:
sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
err_free_object:
mxt_free_object_table(data);
err_put_regs:
mxt_regulator_configure(data, false);
err_free_regs:
mxt_regulator_disable(data);
err_free_gpios:
mxt_gpio_enable(data, false);
err_destroy_mutex:
mutex_destroy(&data->debug_msg_lock);
return error;
}
static int mxt_remove(struct i2c_client *client)
{
struct mxt_data *data = i2c_get_clientdata(client);
if (data->mem_access_attr.attr.name)
sysfs_remove_bin_file(&client->dev.kobj,
&data->mem_access_attr);
#if defined(CONFIG_FB)
fb_unregister_client(&data->fb_notif);
#elif defined(CONFIG_HAS_EARLYSUSPEND)
unregister_early_suspend(&data->early_suspend);
#endif
sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
free_irq(data->irq, data);
mxt_regulator_configure(data, false);
mxt_regulator_disable(data);
if (!IS_ERR(data->reg_xvdd))
regulator_put(data->reg_xvdd);
regulator_put(data->reg_avdd);
regulator_put(data->reg_vdd);
mxt_free_object_table(data);
if (!dev_get_platdata(&data->client->dev))
kfree(data->pdata);
kfree(data);
return 0;
}
static void mxt_shutdown(struct i2c_client *client)
{
struct mxt_data *data = i2c_get_clientdata(client);
disable_irq(data->irq);
}
static const struct i2c_device_id mxt_id[] = {
{ "qt602240_ts", 0 },
{ "atmel_mxt_ts", 0 },
{ "atmel_maxtouch_ts", 0 },
{ "atmel_mxt_tp", 0 },
{ "mXT224", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, mxt_id);
#ifdef CONFIG_OF
static struct of_device_id mxt_match_table[] = {
{ .compatible = "atmel,maxtouch-ts",},
{ },
};
#else
#define mxt_match_table NULL
#endif
static struct i2c_driver mxt_driver = {
.driver = {
.name = "atmel_maxtouch_ts",
.owner = THIS_MODULE,
#ifdef CONFIG_PM_SLEEP
.pm = &mxt_pm_ops,
#endif
.of_match_table = mxt_match_table,
},
.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);
}
late_initcall(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");
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