| /* |
| * 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/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> |
| |
| /* 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"); |
| |
| INIT_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; |
| INIT_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) |
| { |
| int rc; |
| gpio_set_value(data->pdata->gpio_reset, 0); |
| |
| rc = regulator_enable(data->reg_vdd); |
| if (rc) |
| dev_err(&data->client->dev, |
| "Regulator vdd enable failed, rc=%d\n", rc); |
| rc = regulator_enable(data->reg_avdd); |
| if (rc) |
| dev_err(&data->client->dev, |
| "Regulator avdd enable failed, rc=%d\n", rc); |
| msleep(MXT_REGULATOR_DELAY); |
| |
| INIT_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, 0); |
| 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); |
| INIT_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, 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, |
| 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 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 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 = 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"); |