diff options
| -rwxr-xr-x | drivers/input/touchscreen/atmel_maxtouch_ts.c | 3286 | ||||
| -rwxr-xr-x | include/linux/input/atmel_maxtouch_ts.h | 29 |
2 files changed, 3315 insertions, 0 deletions
diff --git a/drivers/input/touchscreen/atmel_maxtouch_ts.c b/drivers/input/touchscreen/atmel_maxtouch_ts.c new file mode 100755 index 000000000000..d94aa65e2af0 --- /dev/null +++ b/drivers/input/touchscreen/atmel_maxtouch_ts.c @@ -0,0 +1,3286 @@ +/* + * Atmel maXTouch Touchscreen driver + * + * 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/i2c/atmel_mxt_ts.h> +#include <linux/input/mt.h> +#include <linux/interrupt.h> +#include <linux/slab.h> +#include <linux/regulator/consumer.h> +#include <linux/gpio.h> + +/* 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 + +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; + 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; + char *fw_name; + char *cfg_name; + + /* 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; +}; + +static inline size_t mxt_obj_size(const struct mxt_object *obj) +{ + return obj->size_minus_one + 1; +} + +static inline size_t 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_err(&data->client->dev, "Failed to create %s\n", + data->debug_msg_attr.attr.name); + return -EINVAL; + } + + 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->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; + size_t 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]); + + 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; +} + +static irqreturn_t mxt_interrupt(int irq, void *dev_id) +{ + struct mxt_data *data = dev_id; + + if (data->in_bootloader) { + /* bootloader state transition completion */ + complete(&data->bl_completion); + return IRQ_HANDLED; + } + + if (!data->object_table) + return IRQ_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); + +/* + * mxt_check_reg_init - 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_check_reg_init(struct mxt_data *data) +{ + struct device *dev = &data->client->dev; + struct mxt_info cfg_info; + struct mxt_object *object; + const struct firmware *cfg = NULL; + int ret; + int offset; + int data_pos; + int byte_offset; + int i; + int cfg_start_ofs; + u32 info_crc, config_crc, calculated_crc; + u8 *config_mem; + size_t config_mem_size; + unsigned int type, instance, size; + u8 val; + u16 reg; + + if (!data->cfg_name) { + dev_dbg(dev, "Skipping cfg download\n"); + return 0; + } + + ret = request_firmware(&cfg, data->cfg_name, dev); + if (ret < 0) { + dev_err(dev, "Failure to request config file %s\n", + data->cfg_name); + return 0; + } + + 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; + + /* The Info Block CRC is calculated over mxt_info and the object table + * If it does not match then we are trying to load the configuration + * from a different chip or firmware version, so the configuration CRC + * is invalid anyway. */ + if (info_crc == data->info_crc) { + if (config_crc == 0 || data->config_crc == 0) { + dev_info(dev, "CRC zero, attempting to apply config\n"); + } else if (config_crc == data->config_crc) { + dev_info(dev, "Config CRC 0x%06X: OK\n", + data->config_crc); + ret = 0; + goto release; + } else { + dev_info(dev, "Config CRC 0x%06X: does not match file 0x%06X\n", + data->config_crc, config_crc); + } + } else { + dev_warn(dev, + "Warning: Info CRC error - device=0x%06X file=0x%06X\n", + data->info_crc, info_crc); + } + + /* Malloc memory to store configuration */ + cfg_start_ofs = MXT_OBJECT_START + + data->info->object_num * sizeof(struct mxt_object) + + MXT_INFO_CHECKSUM_SIZE; + config_mem_size = data->mem_size - cfg_start_ofs; + config_mem = kzalloc(config_mem_size, GFP_KERNEL); + if (!config_mem) { + dev_err(dev, "Failed to allocate memory\n"); + 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; + + 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); + +release_mem: + kfree(config_mem); +release: + release_firmware(cfg); + 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; + size_t 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); + return -EIO; + } + + /* 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); + + dev_info(&client->dev, + "Family: %u Variant: %u Firmware V%u.%u.%02X Objects: %u\n", + data->info->family_id, data->info->variant_id, + data->info->version >> 4, data->info->version & 0xf, + data->info->build, data->info->object_num); + + /* Parse object table information */ + error = mxt_parse_object_table(data); + if (error) { + dev_err(&client->dev, "Error %d reading object table\n", error); + mxt_free_object_table(data); + return error; + } + + return 0; + +err_free_mem: + kfree(buf); + return error; +} + +static int mxt_read_t9_resolution(struct mxt_data *data) +{ + struct i2c_client *client = data->client; + int error; + struct t9_range range; + unsigned char orient; + struct mxt_object *object; + + object = mxt_get_object(data, MXT_TOUCH_MULTI_T9); + if (!object) + return -EINVAL; + + error = __mxt_read_reg(client, + object->start_address + MXT_T9_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; + + if (orient & MXT_T9_ORIENT_SWITCH) { + data->max_x = range.y; + data->max_y = range.x; + } else { + data->max_x = range.x; + data->max_y = range.y; + } + + dev_info(&client->dev, + "Touchscreen size X%uY%u\n", data->max_x, data->max_y); + + return 0; +} + +static void mxt_regulator_enable(struct mxt_data *data) +{ + gpio_set_value(data->pdata->gpio_reset, 0); + + regulator_enable(data->reg_vdd); + regulator_enable(data->reg_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); +} + +static void mxt_regulator_disable(struct mxt_data *data) +{ + regulator_disable(data->reg_vdd); + regulator_disable(data->reg_avdd); +} + +static void mxt_probe_regulators(struct mxt_data *data) +{ + struct device *dev = &data->client->dev; + int error; + + /* 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"); + goto fail; + } + + 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); + goto fail; + } + + data->reg_avdd = regulator_get(dev, "avdd"); + if (IS_ERR(data->reg_vdd)) { + error = PTR_ERR(data->reg_vdd); + dev_err(dev, "Error %d getting avdd regulator\n", error); + goto fail_release; + } + + data->use_regulator = true; + mxt_regulator_enable(data); + + dev_dbg(dev, "Initialised regulators\n"); + return; + +fail_release: + regulator_put(data->reg_vdd); +fail: + data->reg_vdd = NULL; + data->reg_avdd = NULL; + data->use_regulator = false; +} + +static int mxt_read_t100_config(struct mxt_data *data) +{ + struct i2c_client *client = data->client; + int error; + struct mxt_object *object; + u16 range_x, range_y; + u8 cfg, tchaux; + u8 aux; + + object = mxt_get_object(data, MXT_TOUCH_MULTITOUCHSCREEN_T100); + if (!object) + return -EINVAL; + + 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; + + if (cfg & MXT_T100_CFG_SWITCHXY) { + data->max_x = range_y; + data->max_y = range_x; + } else { + data->max_x = range_x; + data->max_y = range_y; + } + + /* 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", data->max_x, data->max_y); + + return 0; +} + +static int mxt_input_open(struct input_dev *dev); +static void mxt_input_close(struct input_dev *dev); + +static int mxt_initialize_t100_input_device(struct mxt_data *data) +{ + struct device *dev = &data->client->dev; + struct input_dev *input_dev; + int error; + + error = mxt_read_t100_config(data); + if (error) + dev_warn(dev, "Failed to initialize T9 resolution\n"); + + input_dev = input_allocate_device(); + if (!data || !input_dev) { + dev_err(dev, "Failed to allocate memory\n"); + return -ENOMEM; + } + + input_dev->name = "atmel_mxt_ts T100 touchscreen"; + + input_dev->phys = data->phys; + input_dev->id.bustype = BUS_I2C; + input_dev->dev.parent = &data->client->dev; + input_dev->open = mxt_input_open; + input_dev->close = mxt_input_close; + + set_bit(EV_ABS, input_dev->evbit); + input_set_capability(input_dev, EV_KEY, BTN_TOUCH); + + /* For single touch */ + input_set_abs_params(input_dev, ABS_X, + 0, data->max_x, 0, 0); + input_set_abs_params(input_dev, ABS_Y, + 0, data->max_y, 0, 0); + + if (data->t100_aux_ampl) + input_set_abs_params(input_dev, ABS_PRESSURE, + 0, 255, 0, 0); + + /* For multi touch */ + error = input_mt_init_slots(input_dev, data->num_touchids); + if (error) { + dev_err(dev, "Error %d initialising slots\n", error); + goto err_free_mem; + } + + input_set_abs_params(input_dev, ABS_MT_TOOL_TYPE, 0, MT_TOOL_MAX, 0, 0); + input_set_abs_params(input_dev, ABS_MT_POSITION_X, + 0, data->max_x, 0, 0); + input_set_abs_params(input_dev, ABS_MT_POSITION_Y, + 0, data->max_y, 0, 0); + + if (data->t100_aux_area) + input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, + 0, MXT_MAX_AREA, 0, 0); + + if (data->t100_aux_ampl) + input_set_abs_params(input_dev, ABS_MT_PRESSURE, + 0, 255, 0, 0); + + if (data->t100_aux_vect) + input_set_abs_params(input_dev, ABS_MT_ORIENTATION, + 0, 255, 0, 0); + + input_set_drvdata(input_dev, data); + + error = input_register_device(input_dev); + if (error) { + dev_err(dev, "Error %d registering input device\n", error); + goto err_free_mem; + } + + data->input_dev = input_dev; + + return 0; + +err_free_mem: + input_free_device(input_dev); + return error; +} + +static int mxt_initialize_t9_input_device(struct mxt_data *data); +static int mxt_configure_objects(struct mxt_data *data); + +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; + return 0; + } + + /* 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; + + return 0; +} + +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_err(&client->dev, "Failed to initialize power cfg\n"); + return error; + } + + /* Check register init values */ + error = mxt_check_reg_init(data); + if (error) { + dev_err(&client->dev, "Error %d initialising configuration\n", + error); + return error; + } + + if (data->T9_reportid_min) { + error = mxt_initialize_t9_input_device(data); + if (error) + return error; + } else if (data->T100_reportid_min) { + error = mxt_initialize_t100_input_device(data); + if (error) + return error; + } else { + dev_warn(&client->dev, "No touch object detected\n"); + } + + data->enable_reporting = true; + 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); +} + +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, %zd 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 int mxt_update_file_name(struct device *dev, char **file_name, + const char *buf, size_t count) +{ + char *file_name_tmp; + + /* Simple sanity check */ + if (count > 64) { + dev_warn(dev, "File name too long\n"); + return -EINVAL; + } + + file_name_tmp = krealloc(*file_name, count + 1, GFP_KERNEL); + if (!file_name_tmp) { + dev_warn(dev, "no memory\n"); + return -ENOMEM; + } + + *file_name = file_name_tmp; + memcpy(*file_name, buf, count); + + /* Echo into the sysfs entry may append newline at the end of buf */ + if (buf[count - 1] == '\n') + (*file_name)[count - 1] = '\0'; + else + (*file_name)[count] = '\0'; + + return 0; +} + +static ssize_t mxt_update_fw_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct mxt_data *data = dev_get_drvdata(dev); + int error; + + error = mxt_update_file_name(dev, &data->fw_name, buf, count); + if (error) + return error; + + 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"); + + data->suspended = false; + + error = mxt_initialize(data); + if (error) + return error; + } + + return count; +} + +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; + + if (data->in_bootloader) { + dev_err(dev, "Not in appmode\n"); + return -EINVAL; + } + + ret = mxt_update_file_name(dev, &data->cfg_name, buf, count); + if (ret) + return ret; + + data->enable_reporting = false; + mxt_free_input_device(data); + + if (data->suspended) { + if (data->use_regulator) + mxt_regulator_enable(data); + else + mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN); + + mxt_acquire_irq(data); + + data->suspended = false; + } + + ret = mxt_configure_objects(data); + if (ret) + goto out; + + ret = count; +out: + return ret; +} + +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; +} + +static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL); +static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL); +static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL); +static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store); +static DEVICE_ATTR(update_cfg, S_IWUSR, NULL, mxt_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_version.attr, + &dev_attr_hw_version.attr, + &dev_attr_object.attr, + &dev_attr_update_fw.attr, + &dev_attr_update_cfg.attr, + &dev_attr_debug_enable.attr, + &dev_attr_debug_v2_enable.attr, + &dev_attr_debug_notify.attr, + NULL +}; + +static const struct attribute_group mxt_attr_group = { + .attrs = mxt_attrs, +}; + +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_start(struct mxt_data *data) +{ + if (!data->suspended || data->in_bootloader) + return; + + if (data->use_regulator) { + mxt_regulator_enable(data); + } else { + /* 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_stop(struct mxt_data *data) +{ + if (data->suspended || data->in_bootloader) + return; + + data->enable_reporting = false; + disable_irq(data->irq); + + if (data->use_regulator) + mxt_regulator_disable(data); + else + mxt_set_t7_power_cfg(data, MXT_POWER_CFG_DEEPSLEEP); + + 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_handle_pdata(struct mxt_data *data) +{ + data->pdata = dev_get_platdata(&data->client->dev); + + /* Use provided platform data if present */ + if (data->pdata) { + if (data->pdata->cfg_name) + mxt_update_file_name(&data->client->dev, + &data->cfg_name, + data->pdata->cfg_name, + strlen(data->pdata->cfg_name)); + + return 0; + } + + data->pdata = kzalloc(sizeof(*data->pdata), GFP_KERNEL); + if (!data->pdata) { + dev_err(&data->client->dev, "Failed to allocate pdata\n"); + return -ENOMEM; + } + + /* Set default parameters */ + data->pdata->irqflags = IRQF_TRIGGER_FALLING; + + return 0; +} + +static int mxt_initialize_t9_input_device(struct mxt_data *data) +{ + struct device *dev = &data->client->dev; + const struct mxt_platform_data *pdata = data->pdata; + struct input_dev *input_dev; + int error; + unsigned int num_mt_slots; + int i; + + error = mxt_read_t9_resolution(data); + if (error) + dev_warn(dev, "Failed to initialize T9 resolution\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); + input_set_capability(input_dev, EV_KEY, BTN_TOUCH); + + if (pdata->t19_num_keys) { + __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit); + + for (i = 0; i < pdata->t19_num_keys; i++) + if (pdata->t19_keymap[i] != KEY_RESERVED) + input_set_capability(input_dev, EV_KEY, + pdata->t19_keymap[i]); + + __set_bit(BTN_TOOL_FINGER, input_dev->keybit); + __set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit); + __set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit); + __set_bit(BTN_TOOL_QUADTAP, input_dev->keybit); + + input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM); + input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM); + input_abs_set_res(input_dev, ABS_MT_POSITION_X, + MXT_PIXELS_PER_MM); + input_abs_set_res(input_dev, ABS_MT_POSITION_Y, + MXT_PIXELS_PER_MM); + + input_dev->name = "Atmel maXTouch Touchpad"; + } + + /* For single touch */ + input_set_abs_params(input_dev, ABS_X, + 0, data->max_x, 0, 0); + input_set_abs_params(input_dev, ABS_Y, + 0, data->max_y, 0, 0); + input_set_abs_params(input_dev, ABS_PRESSURE, + 0, 255, 0, 0); + + /* For multi touch */ + num_mt_slots = data->num_touchids + data->num_stylusids; + error = input_mt_init_slots(input_dev, num_mt_slots); + 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, + 0, data->max_x, 0, 0); + input_set_abs_params(input_dev, ABS_MT_POSITION_Y, + 0, data->max_y, 0, 0); + input_set_abs_params(input_dev, ABS_MT_PRESSURE, + 0, 255, 0, 0); + input_set_abs_params(input_dev, ABS_MT_ORIENTATION, + 0, 255, 0, 0); + + /* For T63 active stylus */ + if (data->T63_reportid_min) { + 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->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 __devinit mxt_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct mxt_data *data; + int error; + + data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL); + if (!data) { + dev_err(&client->dev, "Failed to allocate memory\n"); + return -ENOMEM; + } + + snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0", + client->adapter->nr, client->addr); + + data->client = client; + data->irq = client->irq; + i2c_set_clientdata(client, data); + + error = mxt_handle_pdata(data); + if (error) + goto err_free_mem; + + init_completion(&data->bl_completion); + init_completion(&data->reset_completion); + init_completion(&data->crc_completion); + mutex_init(&data->debug_msg_lock); + + 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_free_pdata; + } + + mxt_probe_regulators(data); + + disable_irq(data->irq); + + error = mxt_initialize(data); + if (error) + goto err_free_irq; + + error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group); + if (error) { + dev_err(&client->dev, "Failure %d creating sysfs group\n", + error); + goto err_free_object; + } + + sysfs_bin_attr_init(&data->mem_access_attr); + data->mem_access_attr.attr.name = "mem_access"; + data->mem_access_attr.attr.mode = S_IRUGO | S_IWUSR; + data->mem_access_attr.read = mxt_mem_access_read; + data->mem_access_attr.write = mxt_mem_access_write; + data->mem_access_attr.size = data->mem_size; + + if (sysfs_create_bin_file(&client->dev.kobj, + &data->mem_access_attr) < 0) { + dev_err(&client->dev, "Failed to create %s\n", + data->mem_access_attr.attr.name); + goto err_remove_sysfs_group; + } + + return 0; + +err_remove_sysfs_group: + sysfs_remove_group(&client->dev.kobj, &mxt_attr_group); +err_free_object: + mxt_free_object_table(data); +err_free_irq: + free_irq(data->irq, data); +err_free_pdata: + if (!dev_get_platdata(&data->client->dev)) + kfree(data->pdata); +err_free_mem: + kfree(data); + return error; +} + +static int __devexit 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); + + sysfs_remove_group(&client->dev.kobj, &mxt_attr_group); + free_irq(data->irq, data); + 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; +} + +#ifdef CONFIG_PM_SLEEP +static int mxt_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct mxt_data *data = i2c_get_clientdata(client); + struct input_dev *input_dev = data->input_dev; + + 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 i2c_client *client = to_i2c_client(dev); + struct mxt_data *data = i2c_get_clientdata(client); + struct input_dev *input_dev = data->input_dev; + + mutex_lock(&input_dev->mutex); + + if (input_dev->users) + mxt_start(data); + + mutex_unlock(&input_dev->mutex); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume); + +static void mxt_shutdown(struct i2c_client *client) +{ + struct mxt_data *data = i2c_get_clientdata(client); + + disable_irq(data->irq); +} + +static const struct i2c_device_id mxt_id[] = { + { "qt602240_ts", 0 }, + { "atmel_mxt_ts", 0 }, + { "atmel_mxt_tp", 0 }, + { "mXT224", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, mxt_id); + +static struct i2c_driver mxt_driver = { + .driver = { + .name = "atmel_mxt_ts", + .owner = THIS_MODULE, + .pm = &mxt_pm_ops, + }, + .probe = mxt_probe, + .remove = __devexit_p(mxt_remove), + .shutdown = mxt_shutdown, + .id_table = mxt_id, +}; + +static int __init mxt_init(void) +{ + return i2c_add_driver(&mxt_driver); +} + +static void __exit mxt_exit(void) +{ + i2c_del_driver(&mxt_driver); +} + +module_init(mxt_init); +module_exit(mxt_exit); + +/* Module information */ +MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); +MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/input/atmel_maxtouch_ts.h b/include/linux/input/atmel_maxtouch_ts.h new file mode 100755 index 000000000000..3422bd0d847b --- /dev/null +++ b/include/linux/input/atmel_maxtouch_ts.h @@ -0,0 +1,29 @@ +/* + * Atmel maXTouch Touchscreen driver + * + * Copyright (C) 2010 Samsung Electronics Co.Ltd + * Author: Joonyoung Shim <jy0922.shim@samsung.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#ifndef __LINUX_ATMEL_MXT_TS_H +#define __LINUX_ATMEL_MXT_TS_H + +#include <linux/types.h> + +/* The platform data for the Atmel maXTouch touchscreen driver */ +struct mxt_platform_data { + unsigned long irqflags; + u8 t19_num_keys; + const unsigned int *t19_keymap; + int t15_num_keys; + const unsigned int *t15_keymap; + unsigned long gpio_reset; + const char *cfg_name; +}; + +#endif /* __LINUX_ATMEL_MXT_TS_H */ |