/* * Atmel maXTouch Touchscreen driver * * Copyright (c) 2014-2015, The Linux Foundation. All rights reserved. * * Linux foundation chooses to take subject only to the GPLv2 license terms, * and distributes only under these terms. * * Copyright (C) 2010 Samsung Electronics Co.Ltd * Copyright (C) 2011-2012 Atmel Corporation * Copyright (C) 2012 Google, Inc. * * Author: Joonyoung Shim * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #if defined(CONFIG_FB) #include #include #elif defined(CONFIG_HAS_EARLYSUSPEND) #include /* Early-suspend level */ #define MXT_SUSPEND_LEVEL 1 #endif #if defined(CONFIG_SECURE_TOUCH) #include #include #include #include #include #endif /* Configuration file */ #define MXT_CFG_MAGIC "OBP_RAW V1" /* Registers */ #define MXT_OBJECT_START 0x07 #define MXT_OBJECT_SIZE 6 #define MXT_INFO_CHECKSUM_SIZE 3 #define MXT_MAX_BLOCK_WRITE 256 /* Object types */ #define MXT_DEBUG_DIAGNOSTIC_T37 37 #define MXT_GEN_MESSAGE_T5 5 #define MXT_GEN_COMMAND_T6 6 #define MXT_GEN_POWER_T7 7 #define MXT_GEN_ACQUIRE_T8 8 #define MXT_GEN_DATASOURCE_T53 53 #define MXT_TOUCH_MULTI_T9 9 #define MXT_TOUCH_KEYARRAY_T15 15 #define MXT_TOUCH_PROXIMITY_T23 23 #define MXT_TOUCH_PROXKEY_T52 52 #define MXT_PROCI_GRIPFACE_T20 20 #define MXT_PROCG_NOISE_T22 22 #define MXT_PROCI_ONETOUCH_T24 24 #define MXT_PROCI_TWOTOUCH_T27 27 #define MXT_PROCI_GRIP_T40 40 #define MXT_PROCI_PALM_T41 41 #define MXT_PROCI_TOUCHSUPPRESSION_T42 42 #define MXT_PROCI_STYLUS_T47 47 #define MXT_PROCG_NOISESUPPRESSION_T48 48 #define MXT_SPT_COMMSCONFIG_T18 18 #define MXT_SPT_GPIOPWM_T19 19 #define MXT_SPT_SELFTEST_T25 25 #define MXT_SPT_CTECONFIG_T28 28 #define MXT_SPT_USERDATA_T38 38 #define MXT_SPT_DIGITIZER_T43 43 #define MXT_SPT_MESSAGECOUNT_T44 44 #define MXT_SPT_CTECONFIG_T46 46 #define MXT_PROCI_ACTIVE_STYLUS_T63 63 #define MXT_TOUCH_MULTITOUCHSCREEN_T100 100 /* MXT_GEN_MESSAGE_T5 object */ #define MXT_RPTID_NOMSG 0xff /* MXT_GEN_COMMAND_T6 field */ #define MXT_COMMAND_RESET 0 #define MXT_COMMAND_BACKUPNV 1 #define MXT_COMMAND_CALIBRATE 2 #define MXT_COMMAND_REPORTALL 3 #define MXT_COMMAND_DIAGNOSTIC 5 /* Define for T6 status byte */ #define MXT_T6_STATUS_RESET (1 << 7) #define MXT_T6_STATUS_OFL (1 << 6) #define MXT_T6_STATUS_SIGERR (1 << 5) #define MXT_T6_STATUS_CAL (1 << 4) #define MXT_T6_STATUS_CFGERR (1 << 3) #define MXT_T6_STATUS_COMSERR (1 << 2) /* MXT_GEN_POWER_T7 field */ struct t7_config { u8 idle; u8 active; } __packed; #define MXT_POWER_CFG_RUN 0 #define MXT_POWER_CFG_DEEPSLEEP 1 /* MXT_TOUCH_MULTI_T9 field */ #define MXT_T9_ORIENT 9 #define MXT_T9_RANGE 18 /* MXT_TOUCH_MULTI_T9 status */ #define MXT_T9_UNGRIP (1 << 0) #define MXT_T9_SUPPRESS (1 << 1) #define MXT_T9_AMP (1 << 2) #define MXT_T9_VECTOR (1 << 3) #define MXT_T9_MOVE (1 << 4) #define MXT_T9_RELEASE (1 << 5) #define MXT_T9_PRESS (1 << 6) #define MXT_T9_DETECT (1 << 7) struct t9_range { u16 x; u16 y; } __packed; /* MXT_TOUCH_MULTI_T9 orient */ #define MXT_T9_ORIENT_SWITCH (1 << 0) /* MXT_SPT_COMMSCONFIG_T18 */ #define MXT_COMMS_CTRL 0 #define MXT_COMMS_CMD 1 #define MXT_COMMS_RETRIGEN (1 << 6) /* Define for MXT_GEN_COMMAND_T6 */ #define MXT_BOOT_VALUE 0xa5 #define MXT_RESET_VALUE 0x01 #define MXT_BACKUP_VALUE 0x55 /* Define for MXT_PROCI_TOUCHSUPPRESSION_T42 */ #define MXT_T42_MSG_TCHSUP (1 << 0) /* T47 Stylus */ #define MXT_TOUCH_MAJOR_T47_STYLUS 1 /* T63 Stylus */ #define MXT_T63_STYLUS_PRESS (1 << 0) #define MXT_T63_STYLUS_RELEASE (1 << 1) #define MXT_T63_STYLUS_MOVE (1 << 2) #define MXT_T63_STYLUS_SUPPRESS (1 << 3) #define MXT_T63_STYLUS_DETECT (1 << 4) #define MXT_T63_STYLUS_TIP (1 << 5) #define MXT_T63_STYLUS_ERASER (1 << 6) #define MXT_T63_STYLUS_BARREL (1 << 7) #define MXT_T63_STYLUS_PRESSURE_MASK 0x3F /* T100 Multiple Touch Touchscreen */ #define MXT_T100_CTRL 0 #define MXT_T100_CFG1 1 #define MXT_T100_TCHAUX 3 #define MXT_T100_XRANGE 13 #define MXT_T100_YRANGE 24 #define MXT_T100_CFG_SWITCHXY (1 << 5) #define MXT_T100_TCHAUX_VECT (1 << 0) #define MXT_T100_TCHAUX_AMPL (1 << 1) #define MXT_T100_TCHAUX_AREA (1 << 2) #define MXT_T100_DETECT (1 << 7) #define MXT_T100_TYPE_MASK 0x70 #define MXT_T100_TYPE_STYLUS 0x20 /* Delay times */ #define MXT_BACKUP_TIME 50 /* msec */ #define MXT_RESET_TIME 200 /* msec */ #define MXT_RESET_TIMEOUT 3000 /* msec */ #define MXT_CRC_TIMEOUT 1000 /* msec */ #define MXT_FW_RESET_TIME 3000 /* msec */ #define MXT_FW_CHG_TIMEOUT 300 /* msec */ #define MXT_WAKEUP_TIME 25 /* msec */ #define MXT_REGULATOR_DELAY 150 /* msec */ #define MXT_POWERON_DELAY 150 /* msec */ /* Command to unlock bootloader */ #define MXT_UNLOCK_CMD_MSB 0xaa #define MXT_UNLOCK_CMD_LSB 0xdc /* Bootloader mode status */ #define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */ #define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */ #define MXT_FRAME_CRC_CHECK 0x02 #define MXT_FRAME_CRC_FAIL 0x03 #define MXT_FRAME_CRC_PASS 0x04 #define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */ #define MXT_BOOT_STATUS_MASK 0x3f #define MXT_BOOT_EXTENDED_ID (1 << 5) #define MXT_BOOT_ID_MASK 0x1f /* Touchscreen absolute values */ #define MXT_MAX_AREA 0xff #define MXT_PIXELS_PER_MM 20 #define DEBUG_MSG_MAX 200 #define MXT_COORDS_ARR_SIZE 4 /* Orient */ #define MXT_NORMAL 0x0 #define MXT_DIAGONAL 0x1 #define MXT_HORIZONTAL_FLIP 0x2 #define MXT_ROTATED_90_COUNTER 0x3 #define MXT_VERTICAL_FLIP 0x4 #define MXT_ROTATED_90 0x5 #define MXT_ROTATED_180 0x6 #define MXT_DIAGONAL_COUNTER 0x7 /* MXT_TOUCH_KEYARRAY_T15 */ #define MXT_KEYARRAY_MAX_KEYS 32 /* Bootoader IDs */ #define MXT_BOOTLOADER_ID_224 0x0A #define MXT_BOOTLOADER_ID_224E 0x06 #define MXT_BOOTLOADER_ID_336S 0x1A #define MXT_BOOTLOADER_ID_1386 0x01 #define MXT_BOOTLOADER_ID_1386E 0x10 #define MXT_BOOTLOADER_ID_1664S 0x14 /* recommended voltage specifications */ #define MXT_VDD_VTG_MIN_UV 1800000 #define MXT_VDD_VTG_MAX_UV 1800000 #define MXT_AVDD_VTG_MIN_UV 2700000 #define MXT_AVDD_VTG_MAX_UV 3300000 #define MXT_XVDD_VTG_MIN_UV 2700000 #define MXT_XVDD_VTG_MAX_UV 10000000 #define MXT_GEN_CFG "maxtouch_generic_cfg.raw" #define MXT_NAME_MAX_LEN 100 struct mxt_info { u8 family_id; u8 variant_id; u8 version; u8 build; u8 matrix_xsize; u8 matrix_ysize; u8 object_num; }; struct mxt_object { u8 type; u16 start_address; u8 size_minus_one; u8 instances_minus_one; u8 num_report_ids; } __packed; /* Each client has this additional data */ struct mxt_data { struct i2c_client *client; struct input_dev *input_dev; struct pinctrl *ts_pinctrl; struct pinctrl_state *gpio_state_active; struct pinctrl_state *gpio_state_suspend; char phys[64]; /* device physical location */ struct mxt_platform_data *pdata; struct mxt_object *object_table; struct mxt_info *info; void *raw_info_block; unsigned int irq; unsigned int max_x; unsigned int max_y; bool in_bootloader; u16 mem_size; u8 t100_aux_ampl; u8 t100_aux_area; u8 t100_aux_vect; struct bin_attribute mem_access_attr; bool debug_enabled; bool debug_v2_enabled; u8 *debug_msg_data; u16 debug_msg_count; struct bin_attribute debug_msg_attr; struct mutex debug_msg_lock; u8 max_reportid; u32 config_crc; u32 info_crc; u8 bootloader_addr; struct t7_config t7_cfg; u8 *msg_buf; u8 t6_status; bool update_input; u8 last_message_count; u8 num_touchids; u8 num_stylusids; unsigned long t15_keystatus; bool use_retrigen_workaround; bool use_regulator; struct regulator *reg_vdd; struct regulator *reg_avdd; struct regulator *reg_xvdd; char fw_name[MXT_NAME_MAX_LEN]; char cfg_name[MXT_NAME_MAX_LEN]; u8 cfg_version[3]; bool fw_w_no_cfg_update; #if defined(CONFIG_FB) struct notifier_block fb_notif; #elif defined(CONFIG_HAS_EARLYSUSPEND) struct early_suspend early_suspend; #endif /* Cached parameters from object table */ u16 T5_address; u8 T5_msg_size; u8 T6_reportid; u16 T6_address; u16 T7_address; u8 T9_reportid_min; u8 T9_reportid_max; u8 T15_reportid_min; u8 T15_reportid_max; u16 T18_address; u8 T19_reportid; u8 T42_reportid_min; u8 T42_reportid_max; u16 T44_address; u8 T48_reportid; u8 T63_reportid_min; u8 T63_reportid_max; u8 T100_reportid_min; u8 T100_reportid_max; /* for fw update in bootloader */ struct completion bl_completion; /* for reset handling */ struct completion reset_completion; /* for reset handling */ struct completion crc_completion; /* Enable reporting of input events */ bool enable_reporting; /* Indicates whether device is in suspend */ bool suspended; #if defined(CONFIG_SECURE_TOUCH) atomic_t st_enabled; atomic_t st_pending_irqs; bool st_initialized; struct completion st_powerdown; struct clk *core_clk; struct clk *iface_clk; #endif }; static inline unsigned int mxt_obj_size(const struct mxt_object *obj) { return obj->size_minus_one + 1; } static inline unsigned int mxt_obj_instances(const struct mxt_object *obj) { return obj->instances_minus_one + 1; } static bool mxt_object_readable(unsigned int type) { switch (type) { case MXT_GEN_COMMAND_T6: case MXT_GEN_POWER_T7: case MXT_GEN_ACQUIRE_T8: case MXT_GEN_DATASOURCE_T53: case MXT_TOUCH_MULTI_T9: case MXT_TOUCH_KEYARRAY_T15: case MXT_TOUCH_PROXIMITY_T23: case MXT_TOUCH_PROXKEY_T52: case MXT_PROCI_GRIPFACE_T20: case MXT_PROCG_NOISE_T22: case MXT_PROCI_ONETOUCH_T24: case MXT_PROCI_TWOTOUCH_T27: case MXT_PROCI_GRIP_T40: case MXT_PROCI_PALM_T41: case MXT_PROCI_TOUCHSUPPRESSION_T42: case MXT_PROCI_STYLUS_T47: case MXT_PROCG_NOISESUPPRESSION_T48: case MXT_SPT_COMMSCONFIG_T18: case MXT_SPT_GPIOPWM_T19: case MXT_SPT_SELFTEST_T25: case MXT_SPT_CTECONFIG_T28: case MXT_SPT_USERDATA_T38: case MXT_SPT_DIGITIZER_T43: case MXT_SPT_CTECONFIG_T46: return true; default: return false; } } static void mxt_dump_message(struct mxt_data *data, u8 *message) { print_hex_dump(KERN_DEBUG, "MXT MSG:", DUMP_PREFIX_NONE, 16, 1, message, data->T5_msg_size, false); } static void mxt_debug_msg_enable(struct mxt_data *data) { struct device *dev = &data->client->dev; if (data->debug_v2_enabled) return; mutex_lock(&data->debug_msg_lock); data->debug_msg_data = kcalloc(DEBUG_MSG_MAX, data->T5_msg_size, GFP_KERNEL); if (!data->debug_msg_data) { dev_err(&data->client->dev, "Failed to allocate buffer\n"); return; } data->debug_v2_enabled = true; mutex_unlock(&data->debug_msg_lock); dev_info(dev, "Enabled message output\n"); } static void mxt_debug_msg_disable(struct mxt_data *data) { struct device *dev = &data->client->dev; if (!data->debug_v2_enabled) return; dev_info(dev, "disabling message output\n"); data->debug_v2_enabled = false; mutex_lock(&data->debug_msg_lock); kfree(data->debug_msg_data); data->debug_msg_data = NULL; data->debug_msg_count = 0; mutex_unlock(&data->debug_msg_lock); dev_info(dev, "Disabled message output\n"); } static void mxt_debug_msg_add(struct mxt_data *data, u8 *msg) { struct device *dev = &data->client->dev; mutex_lock(&data->debug_msg_lock); if (!data->debug_msg_data) { dev_err(dev, "No buffer!\n"); return; } if (data->debug_msg_count < DEBUG_MSG_MAX) { memcpy(data->debug_msg_data + data->debug_msg_count * data->T5_msg_size, msg, data->T5_msg_size); data->debug_msg_count++; } else { dev_dbg(dev, "Discarding %u messages\n", data->debug_msg_count); data->debug_msg_count = 0; } mutex_unlock(&data->debug_msg_lock); sysfs_notify(&data->client->dev.kobj, NULL, "debug_notify"); } static ssize_t mxt_debug_msg_write(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) { return -EIO; } static ssize_t mxt_debug_msg_read(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t bytes) { struct device *dev = container_of(kobj, struct device, kobj); struct mxt_data *data = dev_get_drvdata(dev); int count; size_t bytes_read; if (!data->debug_msg_data) { dev_err(dev, "No buffer!\n"); return 0; } count = bytes / data->T5_msg_size; if (count > DEBUG_MSG_MAX) count = DEBUG_MSG_MAX; mutex_lock(&data->debug_msg_lock); if (count > data->debug_msg_count) count = data->debug_msg_count; bytes_read = count * data->T5_msg_size; memcpy(buf, data->debug_msg_data, bytes_read); data->debug_msg_count = 0; mutex_unlock(&data->debug_msg_lock); return bytes_read; } static int mxt_debug_msg_init(struct mxt_data *data) { sysfs_bin_attr_init(&data->debug_msg_attr); data->debug_msg_attr.attr.name = "debug_msg"; data->debug_msg_attr.attr.mode = 0666; data->debug_msg_attr.read = mxt_debug_msg_read; data->debug_msg_attr.write = mxt_debug_msg_write; data->debug_msg_attr.size = data->T5_msg_size * DEBUG_MSG_MAX; if (sysfs_create_bin_file(&data->client->dev.kobj, &data->debug_msg_attr) < 0) dev_info(&data->client->dev, "Debugfs already exists\n"); return 0; } static void mxt_debug_msg_remove(struct mxt_data *data) { if (data->debug_msg_attr.attr.name) sysfs_remove_bin_file(&data->client->dev.kobj, &data->debug_msg_attr); } static int mxt_wait_for_completion(struct mxt_data *data, struct completion *comp, unsigned int timeout_ms) { struct device *dev = &data->client->dev; unsigned long timeout = msecs_to_jiffies(timeout_ms); long ret; ret = wait_for_completion_interruptible_timeout(comp, timeout); if (ret < 0) { dev_err(dev, "Wait for completion interrupted.\n"); return -EINTR; } else if (ret == 0) { dev_err(dev, "Wait for completion timed out.\n"); return -ETIMEDOUT; } return 0; } static int mxt_bootloader_read(struct mxt_data *data, u8 *val, unsigned int count) { int ret; struct i2c_msg msg; msg.addr = data->bootloader_addr; msg.flags = data->client->flags & I2C_M_TEN; msg.flags |= I2C_M_RD; msg.len = count; msg.buf = val; ret = i2c_transfer(data->client->adapter, &msg, 1); if (ret == 1) { ret = 0; } else { ret = (ret < 0) ? ret : -EIO; dev_err(&data->client->dev, "%s: i2c recv failed (%d)\n", __func__, ret); } return ret; } static int mxt_bootloader_write(struct mxt_data *data, const u8 * const val, unsigned int count) { int ret; struct i2c_msg msg; msg.addr = data->bootloader_addr; msg.flags = data->client->flags & I2C_M_TEN; msg.len = count; msg.buf = (u8 *)val; ret = i2c_transfer(data->client->adapter, &msg, 1); if (ret == 1) { ret = 0; } else { ret = (ret < 0) ? ret : -EIO; dev_err(&data->client->dev, "%s: i2c send failed (%d)\n", __func__, ret); } return ret; } static int mxt_lookup_bootloader_address(struct mxt_data *data, bool retry) { u8 appmode = data->client->addr; u8 bootloader; u8 family_id = 0; if (data->pdata->bl_addr) { data->bootloader_addr = data->pdata->bl_addr; return 0; } if (data->info) family_id = data->info->family_id; switch (appmode) { case 0x4a: case 0x4b: /* Chips after 1664S use different scheme */ if (retry || family_id >= 0xa2) { bootloader = appmode - 0x24; break; } /* Fall through for normal case */ case 0x4c: case 0x4d: case 0x5a: case 0x5b: bootloader = appmode - 0x26; break; default: dev_err(&data->client->dev, "Appmode i2c address 0x%02x not found\n", appmode); return -EINVAL; } data->bootloader_addr = bootloader; return 0; } static int mxt_probe_bootloader(struct mxt_data *data, bool retry) { struct device *dev = &data->client->dev; int ret; u8 val; bool crc_failure; ret = mxt_lookup_bootloader_address(data, retry); if (ret) return ret; ret = mxt_bootloader_read(data, &val, 1); if (ret) return ret; /* Check app crc fail mode */ crc_failure = (val & ~MXT_BOOT_STATUS_MASK) == MXT_APP_CRC_FAIL; dev_err(dev, "Detected bootloader, status:%02X%s\n", val, crc_failure ? ", APP_CRC_FAIL" : ""); return 0; } static u8 mxt_get_bootloader_version(struct mxt_data *data, u8 val) { struct device *dev = &data->client->dev; u8 buf[3]; if (val & MXT_BOOT_EXTENDED_ID) { if (mxt_bootloader_read(data, &buf[0], 3) != 0) { dev_err(dev, "%s: i2c failure\n", __func__); return -EIO; } dev_info(dev, "Bootloader ID:%d Version:%d\n", buf[1], buf[2]); return buf[0]; } else { dev_info(dev, "Bootloader ID:%d\n", val & MXT_BOOT_ID_MASK); return val; } } static int mxt_check_bootloader(struct mxt_data *data, unsigned int state, bool wait) { struct device *dev = &data->client->dev; u8 val; int ret; recheck: if (wait) { /* * In application update mode, the interrupt * line signals state transitions. We must wait for the * CHG assertion before reading the status byte. * Once the status byte has been read, the line is deasserted. */ ret = mxt_wait_for_completion(data, &data->bl_completion, MXT_FW_CHG_TIMEOUT); if (ret) { /* * TODO: handle -EINTR better by terminating fw update * process before returning to userspace by writing * length 0x000 to device (iff we are in * WAITING_FRAME_DATA state). */ dev_err(dev, "Update wait error %d\n", ret); return ret; } } ret = mxt_bootloader_read(data, &val, 1); if (ret) return ret; if (state == MXT_WAITING_BOOTLOAD_CMD) val = mxt_get_bootloader_version(data, val); switch (state) { case MXT_WAITING_BOOTLOAD_CMD: case MXT_WAITING_FRAME_DATA: case MXT_APP_CRC_FAIL: val &= ~MXT_BOOT_STATUS_MASK; break; case MXT_FRAME_CRC_PASS: if (val == MXT_FRAME_CRC_CHECK) { goto recheck; } else if (val == MXT_FRAME_CRC_FAIL) { dev_err(dev, "Bootloader CRC fail\n"); return -EINVAL; } break; default: return -EINVAL; } if (val != state) { dev_err(dev, "Invalid bootloader state %02X != %02X\n", val, state); return -EINVAL; } return 0; } static int mxt_send_bootloader_cmd(struct mxt_data *data, bool unlock) { int ret; u8 buf[2]; if (unlock) { buf[0] = MXT_UNLOCK_CMD_LSB; buf[1] = MXT_UNLOCK_CMD_MSB; } else { buf[0] = 0x01; buf[1] = 0x01; } ret = mxt_bootloader_write(data, buf, 2); if (ret) return ret; return 0; } static int __mxt_read_reg(struct i2c_client *client, u16 reg, u16 len, void *val) { struct i2c_msg xfer[2]; u8 buf[2]; int ret; bool retry = false; buf[0] = reg & 0xff; buf[1] = (reg >> 8) & 0xff; /* Write register */ xfer[0].addr = client->addr; xfer[0].flags = 0; xfer[0].len = 2; xfer[0].buf = buf; /* Read data */ xfer[1].addr = client->addr; xfer[1].flags = I2C_M_RD; xfer[1].len = len; xfer[1].buf = val; retry_read: ret = i2c_transfer(client->adapter, xfer, ARRAY_SIZE(xfer)); if (ret != ARRAY_SIZE(xfer)) { if (!retry) { dev_dbg(&client->dev, "%s: i2c retry\n", __func__); msleep(MXT_WAKEUP_TIME); retry = true; goto retry_read; } else { dev_err(&client->dev, "%s: i2c transfer failed (%d)\n", __func__, ret); return -EIO; } } return 0; } static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len, const void *val) { u8 *buf; int count; int ret; bool retry = false; count = len + 2; buf = kmalloc(count, GFP_KERNEL); if (!buf) return -ENOMEM; buf[0] = reg & 0xff; buf[1] = (reg >> 8) & 0xff; memcpy(&buf[2], val, len); retry_write: ret = i2c_master_send(client, buf, count); if (ret != count) { if (!retry) { dev_dbg(&client->dev, "%s: i2c retry\n", __func__); msleep(MXT_WAKEUP_TIME); retry = true; goto retry_write; } else { dev_err(&client->dev, "%s: i2c send failed (%d)\n", __func__, ret); ret = -EIO; } } else { ret = 0; } kfree(buf); return ret; } static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val) { return __mxt_write_reg(client, reg, 1, &val); } static struct mxt_object * mxt_get_object(struct mxt_data *data, u8 type) { struct mxt_object *object; int i; for (i = 0; i < data->info->object_num; i++) { object = data->object_table + i; if (object->type == type) return object; } dev_warn(&data->client->dev, "Invalid object type T%u\n", type); return NULL; } static void mxt_proc_t6_messages(struct mxt_data *data, u8 *msg) { struct device *dev = &data->client->dev; u8 status = msg[1]; u32 crc = msg[2] | (msg[3] << 8) | (msg[4] << 16); if (crc != data->config_crc) { data->config_crc = crc; dev_dbg(dev, "T6 Config Checksum: 0x%06X\n", crc); complete(&data->crc_completion); } /* Detect transition out of reset */ if ((data->t6_status & MXT_T6_STATUS_RESET) && !(status & MXT_T6_STATUS_RESET)) complete(&data->reset_completion); /* Output debug if status has changed */ if (status != data->t6_status) dev_dbg(dev, "T6 Status 0x%02X%s%s%s%s%s%s%s\n", status, (status == 0) ? " OK" : "", (status & MXT_T6_STATUS_RESET) ? " RESET" : "", (status & MXT_T6_STATUS_OFL) ? " OFL" : "", (status & MXT_T6_STATUS_SIGERR) ? " SIGERR" : "", (status & MXT_T6_STATUS_CAL) ? " CAL" : "", (status & MXT_T6_STATUS_CFGERR) ? " CFGERR" : "", (status & MXT_T6_STATUS_COMSERR) ? " COMSERR" : ""); /* Save current status */ data->t6_status = status; } static void mxt_input_button(struct mxt_data *data, u8 *message) { struct input_dev *input = data->input_dev; const struct mxt_platform_data *pdata = data->pdata; bool button; int i; /* do not report events if input device not yet registered */ if (!data->enable_reporting) return; /* Active-low switch */ for (i = 0; i < pdata->t19_num_keys; i++) { if (pdata->t19_keymap[i] == KEY_RESERVED) continue; button = !(message[1] & (1 << i)); input_report_key(input, pdata->t19_keymap[i], button); } } static void mxt_input_sync(struct input_dev *input_dev) { input_mt_report_pointer_emulation(input_dev, false); input_sync(input_dev); } static void mxt_proc_t9_message(struct mxt_data *data, u8 *message) { struct device *dev = &data->client->dev; struct input_dev *input_dev = data->input_dev; int id; u8 status; int x; int y; int area; int amplitude; u8 vector; int tool; /* do not report events if input device not yet registered */ if (!data->enable_reporting) return; id = message[0] - data->T9_reportid_min; status = message[1]; x = (message[2] << 4) | ((message[4] >> 4) & 0xf); y = (message[3] << 4) | ((message[4] & 0xf)); /* Handle 10/12 bit switching */ if (data->max_x < 1024) x >>= 2; if (data->max_y < 1024) y >>= 2; area = message[5]; amplitude = message[6]; vector = message[7]; dev_dbg(dev, "[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u vector: %02X\n", id, (status & MXT_T9_DETECT) ? 'D' : '.', (status & MXT_T9_PRESS) ? 'P' : '.', (status & MXT_T9_RELEASE) ? 'R' : '.', (status & MXT_T9_MOVE) ? 'M' : '.', (status & MXT_T9_VECTOR) ? 'V' : '.', (status & MXT_T9_AMP) ? 'A' : '.', (status & MXT_T9_SUPPRESS) ? 'S' : '.', (status & MXT_T9_UNGRIP) ? 'U' : '.', x, y, area, amplitude, vector); input_mt_slot(input_dev, id); if (status & MXT_T9_DETECT) { /* Multiple bits may be set if the host is slow to read the * status messages, indicating all the events that have * happened */ if (status & MXT_T9_RELEASE) { input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 0); mxt_input_sync(input_dev); } /* A reported size of zero indicates that the reported touch * is a stylus from a linked Stylus T47 object. */ if (area == 0) { area = MXT_TOUCH_MAJOR_T47_STYLUS; tool = MT_TOOL_PEN; } else { tool = MT_TOOL_FINGER; } /* Touch active */ input_mt_report_slot_state(input_dev, tool, 1); input_report_abs(input_dev, ABS_MT_POSITION_X, x); input_report_abs(input_dev, ABS_MT_POSITION_Y, y); input_report_abs(input_dev, ABS_MT_PRESSURE, amplitude); input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area); input_report_abs(input_dev, ABS_MT_ORIENTATION, vector); } else { /* Touch no longer active, close out slot */ input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 0); } data->update_input = true; } static void mxt_proc_t100_message(struct mxt_data *data, u8 *message) { struct device *dev = &data->client->dev; struct input_dev *input_dev = data->input_dev; int id; u8 status; int x; int y; int tool; /* do not report events if input device not yet registered */ if (!data->enable_reporting) return; id = message[0] - data->T100_reportid_min - 2; /* ignore SCRSTATUS events */ if (id < 0) return; status = message[1]; x = (message[3] << 8) | message[2]; y = (message[5] << 8) | message[4]; dev_dbg(dev, "[%u] status:%02X x:%u y:%u area:%02X amp:%02X vec:%02X\n", id, status, x, y, (data->t100_aux_area) ? message[data->t100_aux_area] : 0, (data->t100_aux_ampl) ? message[data->t100_aux_ampl] : 0, (data->t100_aux_vect) ? message[data->t100_aux_vect] : 0); input_mt_slot(input_dev, id); if (status & MXT_T100_DETECT) { /* A reported size of zero indicates that the reported touch * is a stylus from a linked Stylus T47 object. */ if ((status & MXT_T100_TYPE_MASK) == MXT_T100_TYPE_STYLUS) tool = MT_TOOL_PEN; else tool = MT_TOOL_FINGER; /* Touch active */ input_mt_report_slot_state(input_dev, tool, 1); input_report_abs(input_dev, ABS_MT_POSITION_X, x); input_report_abs(input_dev, ABS_MT_POSITION_Y, y); if (data->t100_aux_ampl) input_report_abs(input_dev, ABS_MT_PRESSURE, message[data->t100_aux_ampl]); else input_report_abs(input_dev, ABS_MT_PRESSURE, 255); if (data->t100_aux_area) { if (tool == MT_TOOL_PEN) input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, MXT_TOUCH_MAJOR_T47_STYLUS); else input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, message[data->t100_aux_area]); } if (data->t100_aux_vect) input_report_abs(input_dev, ABS_MT_ORIENTATION, message[data->t100_aux_vect]); } else { /* Touch no longer active, close out slot */ input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 0); } data->update_input = true; } static void mxt_proc_t15_messages(struct mxt_data *data, u8 *msg) { struct input_dev *input_dev = data->input_dev; struct device *dev = &data->client->dev; int key; bool curr_state, new_state; bool sync = false; unsigned long keystates = le32_to_cpu(msg[2]); /* do not report events if input device not yet registered */ if (!data->enable_reporting) return; for (key = 0; key < data->pdata->t15_num_keys; key++) { curr_state = test_bit(key, &data->t15_keystatus); new_state = test_bit(key, &keystates); if (!curr_state && new_state) { dev_dbg(dev, "T15 key press: %u\n", key); __set_bit(key, &data->t15_keystatus); input_event(input_dev, EV_KEY, data->pdata->t15_keymap[key], 1); sync = true; } else if (curr_state && !new_state) { dev_dbg(dev, "T15 key release: %u\n", key); __clear_bit(key, &data->t15_keystatus); input_event(input_dev, EV_KEY, data->pdata->t15_keymap[key], 0); sync = true; } } if (sync) input_sync(input_dev); } static void mxt_proc_t42_messages(struct mxt_data *data, u8 *msg) { struct device *dev = &data->client->dev; u8 status = msg[1]; if (status & MXT_T42_MSG_TCHSUP) dev_info(dev, "T42 suppress\n"); else dev_info(dev, "T42 normal\n"); } static int mxt_proc_t48_messages(struct mxt_data *data, u8 *msg) { struct device *dev = &data->client->dev; u8 status, state; status = msg[1]; state = msg[4]; dev_dbg(dev, "T48 state %d status %02X %s%s%s%s%s\n", state, status, (status & 0x01) ? "FREQCHG " : "", (status & 0x02) ? "APXCHG " : "", (status & 0x04) ? "ALGOERR " : "", (status & 0x10) ? "STATCHG " : "", (status & 0x20) ? "NLVLCHG " : ""); return 0; } static void mxt_proc_t63_messages(struct mxt_data *data, u8 *msg) { struct device *dev = &data->client->dev; struct input_dev *input_dev = data->input_dev; u8 id; u16 x, y; u8 pressure; /* do not report events if input device not yet registered */ if (!data->enable_reporting) return; /* stylus slots come after touch slots */ id = data->num_touchids + (msg[0] - data->T63_reportid_min); if (id < 0 || id > (data->num_touchids + data->num_stylusids)) { dev_err(dev, "invalid stylus id %d, max slot is %d\n", id, data->num_stylusids); return; } x = msg[3] | (msg[4] << 8); y = msg[5] | (msg[6] << 8); pressure = msg[7] & MXT_T63_STYLUS_PRESSURE_MASK; dev_dbg(dev, "[%d] %c%c%c%c x: %d y: %d pressure: %d stylus:%c%c%c%c\n", id, (msg[1] & MXT_T63_STYLUS_SUPPRESS) ? 'S' : '.', (msg[1] & MXT_T63_STYLUS_MOVE) ? 'M' : '.', (msg[1] & MXT_T63_STYLUS_RELEASE) ? 'R' : '.', (msg[1] & MXT_T63_STYLUS_PRESS) ? 'P' : '.', x, y, pressure, (msg[2] & MXT_T63_STYLUS_BARREL) ? 'B' : '.', (msg[2] & MXT_T63_STYLUS_ERASER) ? 'E' : '.', (msg[2] & MXT_T63_STYLUS_TIP) ? 'T' : '.', (msg[2] & MXT_T63_STYLUS_DETECT) ? 'D' : '.'); input_mt_slot(input_dev, id); if (msg[2] & MXT_T63_STYLUS_DETECT) { input_mt_report_slot_state(input_dev, MT_TOOL_PEN, 1); input_report_abs(input_dev, ABS_MT_POSITION_X, x); input_report_abs(input_dev, ABS_MT_POSITION_Y, y); input_report_abs(input_dev, ABS_MT_PRESSURE, pressure); } else { input_mt_report_slot_state(input_dev, MT_TOOL_PEN, 0); } input_report_key(input_dev, BTN_STYLUS, (msg[2] & MXT_T63_STYLUS_ERASER)); input_report_key(input_dev, BTN_STYLUS2, (msg[2] & MXT_T63_STYLUS_BARREL)); mxt_input_sync(input_dev); } static int mxt_proc_message(struct mxt_data *data, u8 *message) { u8 report_id = message[0]; bool dump = data->debug_enabled; if (report_id == MXT_RPTID_NOMSG) return 0; if (report_id == data->T6_reportid) { mxt_proc_t6_messages(data, message); } else if (report_id >= data->T9_reportid_min && report_id <= data->T9_reportid_max) { mxt_proc_t9_message(data, message); } else if (report_id >= data->T100_reportid_min && report_id <= data->T100_reportid_max) { mxt_proc_t100_message(data, message); } else if (report_id == data->T19_reportid) { mxt_input_button(data, message); data->update_input = true; } else if (report_id >= data->T63_reportid_min && report_id <= data->T63_reportid_max) { mxt_proc_t63_messages(data, message); } else if (report_id >= data->T42_reportid_min && report_id <= data->T42_reportid_max) { mxt_proc_t42_messages(data, message); } else if (report_id == data->T48_reportid) { mxt_proc_t48_messages(data, message); } else if (report_id >= data->T15_reportid_min && report_id <= data->T15_reportid_max) { mxt_proc_t15_messages(data, message); } else { dump = true; } if (dump) mxt_dump_message(data, message); if (data->debug_v2_enabled) mxt_debug_msg_add(data, message); return 1; } static int mxt_read_and_process_messages(struct mxt_data *data, u8 count) { struct device *dev = &data->client->dev; int ret; int i; u8 num_valid = 0; /* Safety check for msg_buf */ if (count > data->max_reportid) return -EINVAL; /* Process remaining messages if necessary */ ret = __mxt_read_reg(data->client, data->T5_address, data->T5_msg_size * count, data->msg_buf); if (ret) { dev_err(dev, "Failed to read %u messages (%d)\n", count, ret); return ret; } for (i = 0; i < count; i++) { ret = mxt_proc_message(data, data->msg_buf + data->T5_msg_size * i); if (ret == 1) num_valid++; } /* return number of messages read */ return num_valid; } static irqreturn_t mxt_process_messages_t44(struct mxt_data *data) { struct device *dev = &data->client->dev; int ret; u8 count, num_left; /* Read T44 and T5 together */ ret = __mxt_read_reg(data->client, data->T44_address, data->T5_msg_size + 1, data->msg_buf); if (ret) { dev_err(dev, "Failed to read T44 and T5 (%d)\n", ret); return IRQ_NONE; } count = data->msg_buf[0]; if (count == 0) { dev_warn(dev, "Interrupt triggered but zero messages\n"); return IRQ_NONE; } else if (count > data->max_reportid) { dev_err(dev, "T44 count %d exceeded max report id\n", count); count = data->max_reportid; } /* Process first message */ ret = mxt_proc_message(data, data->msg_buf + 1); if (ret < 0) { dev_warn(dev, "Unexpected invalid message\n"); return IRQ_NONE; } num_left = count - 1; /* Process remaining messages if necessary */ if (num_left) { ret = mxt_read_and_process_messages(data, num_left); if (ret < 0) goto end; else if (ret != num_left) dev_warn(dev, "Unexpected invalid message\n"); } end: if (data->update_input) { mxt_input_sync(data->input_dev); data->update_input = false; } return IRQ_HANDLED; } static int mxt_process_messages_until_invalid(struct mxt_data *data) { struct device *dev = &data->client->dev; int count, read; u8 tries = 2; count = data->max_reportid; /* Read messages until we force an invalid */ do { read = mxt_read_and_process_messages(data, count); if (read < count) return 0; } while (--tries); if (data->update_input) { mxt_input_sync(data->input_dev); data->update_input = false; } dev_err(dev, "CHG pin isn't cleared\n"); return -EBUSY; } static irqreturn_t mxt_process_messages(struct mxt_data *data) { int total_handled, num_handled; u8 count = data->last_message_count; if (count < 1 || count > data->max_reportid) count = 1; /* include final invalid message */ total_handled = mxt_read_and_process_messages(data, count + 1); if (total_handled < 0) return IRQ_NONE; /* if there were invalid messages, then we are done */ else if (total_handled <= count) goto update_count; /* read two at a time until an invalid message or else we reach * reportid limit */ do { num_handled = mxt_read_and_process_messages(data, 2); if (num_handled < 0) return IRQ_NONE; total_handled += num_handled; if (num_handled < 2) break; } while (total_handled < data->num_touchids); update_count: data->last_message_count = total_handled; if (data->enable_reporting && data->update_input) { mxt_input_sync(data->input_dev); data->update_input = false; } return IRQ_HANDLED; } #if defined(CONFIG_SECURE_TOUCH) static void mxt_secure_touch_notify(struct mxt_data *data) { sysfs_notify(&data->client->dev.kobj, NULL, "secure_touch"); } static irqreturn_t mxt_filter_interrupt(struct mxt_data *data) { if (atomic_read(&data->st_enabled)) { if (atomic_cmpxchg(&data->st_pending_irqs, 0, 1) == 0) mxt_secure_touch_notify(data); return IRQ_HANDLED; } return IRQ_NONE; } #else static irqreturn_t mxt_filter_interrupt(struct mxt_data *data) { return IRQ_NONE; } #endif static irqreturn_t mxt_interrupt(int irq, void *dev_id) { struct mxt_data *data = dev_id; if (data->in_bootloader) { /* bootloader state transition completion */ complete(&data->bl_completion); return IRQ_HANDLED; } if (IRQ_HANDLED == mxt_filter_interrupt(data)) return IRQ_HANDLED; if (!data->object_table) return IRQ_NONE; if (data->T44_address) { return mxt_process_messages_t44(data); } else { return mxt_process_messages(data); } } static int mxt_t6_command(struct mxt_data *data, u16 cmd_offset, u8 value, bool wait) { u16 reg; u8 command_register; int timeout_counter = 0; int ret; reg = data->T6_address + cmd_offset; ret = mxt_write_reg(data->client, reg, value); if (ret) return ret; if (!wait) return 0; do { msleep(20); ret = __mxt_read_reg(data->client, reg, 1, &command_register); if (ret) return ret; } while ((command_register != 0) && (timeout_counter++ <= 100)); if (timeout_counter > 100) { dev_err(&data->client->dev, "Command failed!\n"); return -EIO; } return 0; } static int mxt_soft_reset(struct mxt_data *data) { struct device *dev = &data->client->dev; int ret = 0; dev_info(dev, "Resetting chip\n"); reinit_completion(&data->reset_completion); ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_RESET_VALUE, false); if (ret) return ret; ret = mxt_wait_for_completion(data, &data->reset_completion, MXT_RESET_TIMEOUT); if (ret) return ret; return 0; } static void mxt_update_crc(struct mxt_data *data, u8 cmd, u8 value) { /* on failure, CRC is set to 0 and config will always be downloaded */ data->config_crc = 0; reinit_completion(&data->crc_completion); mxt_t6_command(data, cmd, value, true); /* Wait for crc message. On failure, CRC is set to 0 and config will * always be downloaded */ mxt_wait_for_completion(data, &data->crc_completion, MXT_CRC_TIMEOUT); } static void mxt_calc_crc24(u32 *crc, u8 firstbyte, u8 secondbyte) { static const unsigned int crcpoly = 0x80001B; u32 result; u32 data_word; data_word = (secondbyte << 8) | firstbyte; result = ((*crc << 1) ^ data_word); if (result & 0x1000000) result ^= crcpoly; *crc = result; } static u32 mxt_calculate_crc(u8 *base, off_t start_off, off_t end_off) { u32 crc = 0; u8 *ptr = base + start_off; u8 *last_val = base + end_off - 1; if (end_off < start_off) return -EINVAL; while (ptr < last_val) { mxt_calc_crc24(&crc, *ptr, *(ptr + 1)); ptr += 2; } /* if len is odd, fill the last byte with 0 */ if (ptr == last_val) mxt_calc_crc24(&crc, *ptr, 0); /* Mask to 24-bit */ crc &= 0x00FFFFFF; return crc; } static int mxt_check_retrigen(struct mxt_data *data) { struct i2c_client *client = data->client; int error; int val; if (data->pdata->irqflags & IRQF_TRIGGER_LOW) return 0; if (data->T18_address) { error = __mxt_read_reg(client, data->T18_address + MXT_COMMS_CTRL, 1, &val); if (error) return error; if (val & MXT_COMMS_RETRIGEN) return 0; } dev_warn(&client->dev, "Enabling RETRIGEN workaround\n"); data->use_retrigen_workaround = true; return 0; } static int mxt_init_t7_power_cfg(struct mxt_data *data); static int mxt_update_cfg_version(struct mxt_data *data) { struct mxt_object *object; int error; object = mxt_get_object(data, MXT_SPT_USERDATA_T38); if (!object) return -EINVAL; error = __mxt_read_reg(data->client, object->start_address, sizeof(data->cfg_version), &data->cfg_version); if (error) return error; return 0; } static int mxt_update_t100_resolution(struct mxt_data *data) { struct i2c_client *client = data->client; int error; struct mxt_object *object; u16 range_x, range_y, temp; u8 cfg, tchaux; u8 aux; bool update = false; object = mxt_get_object(data, MXT_TOUCH_MULTITOUCHSCREEN_T100); if (!object) return -EINVAL; error = __mxt_read_reg(client, object->start_address + MXT_T100_XRANGE, sizeof(range_x), &range_x); if (error) return error; le16_to_cpus(range_x); error = __mxt_read_reg(client, object->start_address + MXT_T100_YRANGE, sizeof(range_y), &range_y); if (error) return error; le16_to_cpus(range_y); error = __mxt_read_reg(client, object->start_address + MXT_T100_CFG1, 1, &cfg); if (error) return error; error = __mxt_read_reg(client, object->start_address + MXT_T100_TCHAUX, 1, &tchaux); if (error) return error; /* Handle default values */ if (range_x == 0) range_x = 1023; /* Handle default values */ if (range_x == 0) range_x = 1023; if (range_y == 0) range_y = 1023; dev_dbg(&client->dev, "initial x=%d y=%d\n", range_x, range_y); if (cfg & MXT_T100_CFG_SWITCHXY) { dev_dbg(&client->dev, "flip x and y\n"); temp = range_y; range_y = range_x; range_x = temp; } if (data->pdata->panel_maxx != range_x) { if (cfg & MXT_T100_CFG_SWITCHXY) range_x = data->pdata->panel_maxy; else range_x = data->pdata->panel_maxx; cpu_to_le16s(range_x); error = __mxt_write_reg(client, object->start_address + MXT_T100_XRANGE, sizeof(range_x), &range_x); if (error) return error; dev_dbg(&client->dev, "panel maxx mismatch. update\n"); update = true; } if (data->pdata->panel_maxy != range_y) { if (cfg & MXT_T100_CFG_SWITCHXY) range_y = data->pdata->panel_maxx; else range_y = data->pdata->panel_maxy; cpu_to_le16s(range_y); error = __mxt_write_reg(client, object->start_address + MXT_T100_YRANGE, sizeof(range_y), &range_y); if (error) return error; dev_dbg(&client->dev, "panel maxy mismatch. update\n"); update = true; } if (update) { mxt_update_crc(data, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE); mxt_soft_reset(data); } /* allocate aux bytes */ aux = 6; if (tchaux & MXT_T100_TCHAUX_VECT) data->t100_aux_vect = aux++; if (tchaux & MXT_T100_TCHAUX_AMPL) data->t100_aux_ampl = aux++; if (tchaux & MXT_T100_TCHAUX_AREA) data->t100_aux_area = aux++; dev_info(&client->dev, "T100 Touchscreen size X%uY%u\n", range_x, range_y); return 0; } static int mxt_update_t9_resolution(struct mxt_data *data) { struct i2c_client *client = data->client; int error; struct t9_range range; unsigned char orient; struct mxt_object *object; u16 temp; bool update = false; object = mxt_get_object(data, MXT_TOUCH_MULTI_T9); if (!object) return -EINVAL; error = __mxt_read_reg(client, object->start_address + MXT_T9_RANGE, sizeof(range), &range); if (error) return error; le16_to_cpus(range.x); le16_to_cpus(range.y); error = __mxt_read_reg(client, object->start_address + MXT_T9_ORIENT, 1, &orient); if (error) return error; /* Handle default values */ if (range.x == 0) range.x = 1023; if (range.y == 0) range.y = 1023; dev_dbg(&client->dev, "initial x=%d y=%d\n", range.x, range.y); if (orient & MXT_T9_ORIENT_SWITCH) { dev_dbg(&client->dev, "flip x and y\n"); temp = range.y; range.y = range.x; range.x = temp; } if (data->pdata->panel_maxx != range.x) { if (orient & MXT_T9_ORIENT_SWITCH) range.x = data->pdata->panel_maxy; else range.x = data->pdata->panel_maxx; cpu_to_le16s(range.x); error = __mxt_write_reg(client, object->start_address + MXT_T100_XRANGE, sizeof(range.x), &range.x); if (error) return error; dev_dbg(&client->dev, "panel maxx mismatch. update\n"); update = true; } if (data->pdata->panel_maxy != range.y) { if (orient & MXT_T9_ORIENT_SWITCH) range.y = data->pdata->panel_maxx; else range.y = data->pdata->panel_maxy; cpu_to_le16s(range.y); error = __mxt_write_reg(client, object->start_address + MXT_T100_YRANGE, sizeof(range.y), &range.y); if (error) return error; dev_dbg(&client->dev, "panel maxy mismatch. update\n"); update = true; } if (update) { mxt_update_crc(data, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE); mxt_soft_reset(data); } dev_info(&client->dev, "Touchscreen size X%uY%u\n", range.x, range.y); return 0; } /* * mxt_load_cfg - download configuration to chip * * Atmel Raw Config File Format * * The first four lines of the raw config file contain: * 1) Version * 2) Chip ID Information (first 7 bytes of device memory) * 3) Chip Information Block 24-bit CRC Checksum * 4) Chip Configuration 24-bit CRC Checksum * * The rest of the file consists of one line per object instance: * * * - 2-byte object type as hex * - 2-byte object instance number as hex * - 2-byte object size as hex * - array of 1-byte hex values */ static int mxt_load_cfg(struct mxt_data *data, bool force) { struct device *dev = &data->client->dev; struct mxt_info cfg_info; struct mxt_object *object; const struct firmware *cfg = NULL; int ret = 0; int offset; int data_pos; int byte_offset; int i; int cfg_start_ofs; u32 info_crc, config_crc, calculated_crc; u8 *config_mem; unsigned int config_mem_size; unsigned int type, instance, size; u8 val; int ver[3]; u16 reg; if (!data->cfg_name) { dev_dbg(dev, "Skipping cfg download\n"); goto report_enable; } ret = request_firmware(&cfg, data->cfg_name, dev); if (ret < 0) { dev_err(dev, "Failure to request config file %s\n", data->cfg_name); goto report_enable; } mxt_update_crc(data, MXT_COMMAND_REPORTALL, 1); if (strncmp(cfg->data, MXT_CFG_MAGIC, strlen(MXT_CFG_MAGIC))) { dev_err(dev, "Unrecognised config file\n"); ret = -EINVAL; goto release; } data_pos = strlen(MXT_CFG_MAGIC); /* Load information block and check */ for (i = 0; i < sizeof(struct mxt_info); i++) { ret = sscanf(cfg->data + data_pos, "%hhx%n", (unsigned char *)&cfg_info + i, &offset); if (ret != 1) { dev_err(dev, "Bad format\n"); ret = -EINVAL; goto release; } data_pos += offset; } if (cfg_info.family_id != data->info->family_id) { dev_err(dev, "Family ID mismatch!\n"); ret = -EINVAL; goto release; } if (cfg_info.variant_id != data->info->variant_id) { dev_err(dev, "Variant ID mismatch!\n"); ret = -EINVAL; goto release; } /* Read CRCs */ ret = sscanf(cfg->data + data_pos, "%x%n", &info_crc, &offset); if (ret != 1) { dev_err(dev, "Bad format: failed to parse Info CRC\n"); ret = -EINVAL; goto release; } data_pos += offset; ret = sscanf(cfg->data + data_pos, "%x%n", &config_crc, &offset); if (ret != 1) { dev_err(dev, "Bad format: failed to parse Config CRC\n"); ret = -EINVAL; goto release; } data_pos += offset; /* Malloc memory to store configuration */ cfg_start_ofs = MXT_OBJECT_START + data->info->object_num * sizeof(struct mxt_object) + MXT_INFO_CHECKSUM_SIZE; config_mem_size = data->mem_size - cfg_start_ofs; config_mem = kzalloc(config_mem_size, GFP_KERNEL); if (!config_mem) { dev_err(dev, "Failed to allocate memory\n"); ret = -ENOMEM; goto release; } while (data_pos < cfg->size) { /* Read type, instance, length */ ret = sscanf(cfg->data + data_pos, "%x %x %x%n", &type, &instance, &size, &offset); if (ret == 0) { /* EOF */ break; } else if (ret != 3) { dev_err(dev, "Bad format: failed to parse object\n"); ret = -EINVAL; goto release_mem; } data_pos += offset; if (type == MXT_SPT_USERDATA_T38) { ret = sscanf(cfg->data + data_pos, "%x %x %x", &ver[0], &ver[1], &ver[2]); dev_info(dev, "controller version:%d.%d.%d file version:%d.%d.%d", data->cfg_version[0], data->cfg_version[1], data->cfg_version[2], ver[0], ver[1], ver[2]); if (force || data->fw_w_no_cfg_update) { dev_info(dev, "starting force cfg update\n"); } else if (data->cfg_version[0] != ver[0]) { dev_info(dev, "cfg major versions do not match\n"); ret = -EINVAL; goto release_mem; } else if (data->cfg_version[1] > ver[1]) { dev_info(dev, "configuration is up-to-date\n"); ret = -EINVAL; goto release_mem; } else if (data->cfg_version[1] == ver[1]) { if (data->cfg_version[2] >= ver[2]) { dev_info(dev, "configuration is up-to-date\n"); ret = -EINVAL; goto release_mem; } } else { dev_info(dev, "starting cfg update\n"); } } object = mxt_get_object(data, type); if (!object) { /* Skip object */ for (i = 0; i < size; i++) { ret = sscanf(cfg->data + data_pos, "%hhx%n", &val, &offset); data_pos += offset; } continue; } if (size > mxt_obj_size(object)) { /* Either we are in fallback mode due to wrong * config or config from a later fw version, * or the file is corrupt or hand-edited */ dev_warn(dev, "Discarding %u byte(s) in T%u\n", size - mxt_obj_size(object), type); } else if (mxt_obj_size(object) > size) { /* If firmware is upgraded, new bytes may be added to * end of objects. It is generally forward compatible * to zero these bytes - previous behaviour will be * retained. However this does invalidate the CRC and * will force fallback mode until the configuration is * updated. We warn here but do nothing else - the * malloc has zeroed the entire configuration. */ dev_warn(dev, "Zeroing %u byte(s) in T%d\n", mxt_obj_size(object) - size, type); } if (instance >= mxt_obj_instances(object)) { dev_err(dev, "Object instances exceeded!\n"); ret = -EINVAL; goto release_mem; } reg = object->start_address + mxt_obj_size(object) * instance; for (i = 0; i < size; i++) { ret = sscanf(cfg->data + data_pos, "%hhx%n", &val, &offset); if (ret != 1) { dev_err(dev, "Bad format in T%d\n", type); ret = -EINVAL; goto release_mem; } data_pos += offset; if (i > mxt_obj_size(object)) continue; byte_offset = reg + i - cfg_start_ofs; if ((byte_offset >= 0) && (byte_offset <= config_mem_size)) { *(config_mem + byte_offset) = val; } else { dev_err(dev, "Bad object: reg:%d, T%d, ofs=%d\n", reg, object->type, byte_offset); ret = -EINVAL; goto release_mem; } } } /* calculate crc of the received configs (not the raw config file) */ if (data->T7_address < cfg_start_ofs) { dev_err(dev, "Bad T7 address, T7addr = %x, config offset %x\n", data->T7_address, cfg_start_ofs); ret = 0; goto release_mem; } calculated_crc = mxt_calculate_crc(config_mem, data->T7_address - cfg_start_ofs, config_mem_size); if (config_crc > 0 && (config_crc != calculated_crc)) dev_warn(dev, "Config CRC error, calculated=%06X, file=%06X\n", calculated_crc, config_crc); /* Write configuration as blocks */ byte_offset = 0; while (byte_offset < config_mem_size) { size = config_mem_size - byte_offset; if (size > MXT_MAX_BLOCK_WRITE) size = MXT_MAX_BLOCK_WRITE; ret = __mxt_write_reg(data->client, cfg_start_ofs + byte_offset, size, config_mem + byte_offset); if (ret != 0) { dev_err(dev, "Config write error, ret=%d\n", ret); goto release_mem; } byte_offset += size; } mxt_update_crc(data, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE); ret = mxt_check_retrigen(data); if (ret) goto release_mem; ret = mxt_soft_reset(data); if (ret) goto release_mem; dev_info(dev, "Config written\n"); /* T7 config may have changed */ mxt_init_t7_power_cfg(data); mxt_update_cfg_version(data); /* update resolution if needed */ if (data->T9_reportid_min) { ret = mxt_update_t9_resolution(data); if (ret) goto release_mem; } else if (data->T100_reportid_min) { ret = mxt_update_t100_resolution(data); if (ret) goto release_mem; } else { dev_warn(dev, "No touch object detected\n"); } release_mem: kfree(config_mem); release: release_firmware(cfg); report_enable: data->enable_reporting = true; return ret; } static int mxt_set_t7_power_cfg(struct mxt_data *data, u8 sleep) { struct device *dev = &data->client->dev; int error; struct t7_config *new_config; struct t7_config deepsleep = { .active = 0, .idle = 0 }; if (sleep == MXT_POWER_CFG_DEEPSLEEP) new_config = &deepsleep; else new_config = &data->t7_cfg; error = __mxt_write_reg(data->client, data->T7_address, sizeof(data->t7_cfg), new_config); if (error) return error; dev_dbg(dev, "Set T7 ACTV:%d IDLE:%d\n", new_config->active, new_config->idle); return 0; } static int mxt_init_t7_power_cfg(struct mxt_data *data) { struct device *dev = &data->client->dev; int error; bool retry = false; recheck: error = __mxt_read_reg(data->client, data->T7_address, sizeof(data->t7_cfg), &data->t7_cfg); if (error) return error; if (data->t7_cfg.active == 0 || data->t7_cfg.idle == 0) { if (!retry) { dev_info(dev, "T7 cfg zero, resetting\n"); mxt_soft_reset(data); retry = true; goto recheck; } else { dev_dbg(dev, "T7 cfg zero after reset, overriding\n"); data->t7_cfg.active = 20; data->t7_cfg.idle = 100; return mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN); } } else { dev_info(dev, "Initialised power cfg: ACTV %d, IDLE %d\n", data->t7_cfg.active, data->t7_cfg.idle); return 0; } } static int mxt_acquire_irq(struct mxt_data *data) { int error; enable_irq(data->irq); if (data->use_retrigen_workaround) { error = mxt_process_messages_until_invalid(data); if (error) return error; } return 0; } static void mxt_free_input_device(struct mxt_data *data) { if (data->input_dev) { input_unregister_device(data->input_dev); data->input_dev = NULL; } } static void mxt_free_object_table(struct mxt_data *data) { mxt_debug_msg_remove(data); kfree(data->raw_info_block); data->object_table = NULL; data->info = NULL; data->raw_info_block = NULL; kfree(data->msg_buf); data->msg_buf = NULL; mxt_free_input_device(data); data->enable_reporting = false; data->T5_address = 0; data->T5_msg_size = 0; data->T6_reportid = 0; data->T7_address = 0; data->T9_reportid_min = 0; data->T9_reportid_max = 0; data->T15_reportid_min = 0; data->T15_reportid_max = 0; data->T18_address = 0; data->T19_reportid = 0; data->T42_reportid_min = 0; data->T42_reportid_max = 0; data->T44_address = 0; data->T48_reportid = 0; data->T63_reportid_min = 0; data->T63_reportid_max = 0; data->T100_reportid_min = 0; data->T100_reportid_max = 0; data->max_reportid = 0; } static int mxt_parse_object_table(struct mxt_data *data) { struct i2c_client *client = data->client; int i; u8 reportid; u16 end_address; /* Valid Report IDs start counting from 1 */ reportid = 1; data->mem_size = 0; for (i = 0; i < data->info->object_num; i++) { struct mxt_object *object = data->object_table + i; u8 min_id, max_id; le16_to_cpus(&object->start_address); if (object->num_report_ids) { min_id = reportid; reportid += object->num_report_ids * mxt_obj_instances(object); max_id = reportid - 1; } else { min_id = 0; max_id = 0; } dev_dbg(&data->client->dev, "T%u Start:%u Size:%u Instances:%u Report IDs:%u-%u\n", object->type, object->start_address, mxt_obj_size(object), mxt_obj_instances(object), min_id, max_id); switch (object->type) { case MXT_GEN_MESSAGE_T5: if (data->info->family_id == 0x80) { /* On mXT224 read and discard unused CRC byte * otherwise DMA reads are misaligned */ data->T5_msg_size = mxt_obj_size(object); } else { /* CRC not enabled, so skip last byte */ data->T5_msg_size = mxt_obj_size(object) - 1; } data->T5_address = object->start_address; case MXT_GEN_COMMAND_T6: data->T6_reportid = min_id; data->T6_address = object->start_address; break; case MXT_GEN_POWER_T7: data->T7_address = object->start_address; break; case MXT_TOUCH_MULTI_T9: /* Only handle messages from first T9 instance */ data->T9_reportid_min = min_id; data->T9_reportid_max = min_id + object->num_report_ids - 1; data->num_touchids = object->num_report_ids; break; case MXT_TOUCH_KEYARRAY_T15: data->T15_reportid_min = min_id; data->T15_reportid_max = max_id; break; case MXT_SPT_COMMSCONFIG_T18: data->T18_address = object->start_address; break; case MXT_PROCI_TOUCHSUPPRESSION_T42: data->T42_reportid_min = min_id; data->T42_reportid_max = max_id; break; case MXT_SPT_MESSAGECOUNT_T44: data->T44_address = object->start_address; break; case MXT_SPT_GPIOPWM_T19: data->T19_reportid = min_id; break; case MXT_PROCG_NOISESUPPRESSION_T48: data->T48_reportid = min_id; break; case MXT_PROCI_ACTIVE_STYLUS_T63: /* Only handle messages from first T63 instance */ data->T63_reportid_min = min_id; data->T63_reportid_max = min_id; data->num_stylusids = 1; break; case MXT_TOUCH_MULTITOUCHSCREEN_T100: data->T100_reportid_min = min_id; data->T100_reportid_max = max_id; /* first two report IDs reserved */ data->num_touchids = object->num_report_ids - 2; break; } end_address = object->start_address + mxt_obj_size(object) * mxt_obj_instances(object) - 1; if (end_address >= data->mem_size) data->mem_size = end_address + 1; } /* Store maximum reportid */ data->max_reportid = reportid; /* If T44 exists, T5 position has to be directly after */ if (data->T44_address && (data->T5_address != data->T44_address + 1)) { dev_err(&client->dev, "Invalid T44 position\n"); return -EINVAL; } data->msg_buf = kcalloc(data->max_reportid, data->T5_msg_size, GFP_KERNEL); if (!data->msg_buf) { dev_err(&client->dev, "Failed to allocate message buffer\n"); return -ENOMEM; } return 0; } static int mxt_read_info_block(struct mxt_data *data) { struct i2c_client *client = data->client; int error; u16 size; void *buf; uint8_t num_objects; u32 calculated_crc; u8 *crc_ptr; /* If info block already allocated, free it */ if (data->raw_info_block != NULL) mxt_free_object_table(data); /* Read 7-byte ID information block starting at address 0 */ size = sizeof(struct mxt_info); buf = kzalloc(size, GFP_KERNEL); if (!buf) { dev_err(&client->dev, "Failed to allocate memory\n"); return -ENOMEM; } error = __mxt_read_reg(client, 0, size, buf); if (error) goto err_free_mem; /* Resize buffer to give space for rest of info block */ num_objects = ((struct mxt_info *)buf)->object_num; size += (num_objects * sizeof(struct mxt_object)) + MXT_INFO_CHECKSUM_SIZE; buf = krealloc(buf, size, GFP_KERNEL); if (!buf) { dev_err(&client->dev, "Failed to allocate memory\n"); error = -ENOMEM; goto err_free_mem; } /* Read rest of info block */ error = __mxt_read_reg(client, MXT_OBJECT_START, size - MXT_OBJECT_START, buf + MXT_OBJECT_START); if (error) goto err_free_mem; /* Extract & calculate checksum */ crc_ptr = buf + size - MXT_INFO_CHECKSUM_SIZE; data->info_crc = crc_ptr[0] | (crc_ptr[1] << 8) | (crc_ptr[2] << 16); calculated_crc = mxt_calculate_crc(buf, 0, size - MXT_INFO_CHECKSUM_SIZE); /* CRC mismatch can be caused by data corruption due to I2C comms * issue or else device is not using Object Based Protocol */ if ((data->info_crc == 0) || (data->info_crc != calculated_crc)) { dev_err(&client->dev, "Info Block CRC error calculated=0x%06X read=0x%06X\n", data->info_crc, calculated_crc); if (!data->pdata->ignore_crc) goto err_free_mem; } /* Save pointers in device data structure */ data->raw_info_block = buf; data->info = (struct mxt_info *)buf; data->object_table = (struct mxt_object *)(buf + MXT_OBJECT_START); /* Parse object table information */ error = mxt_parse_object_table(data); if (error) { dev_err(&client->dev, "Error %d reading object table\n", error); goto err_free_obj_table; } error = mxt_update_cfg_version(data); if (error) goto err_free_obj_table; dev_info(&client->dev, "Family: %u Variant: %u Firmware V%u.%u.%02X Objects: %u cfg version: %d.%d.%d\n", data->info->family_id, data->info->variant_id, data->info->version >> 4, data->info->version & 0xf, data->info->build, data->info->object_num, data->cfg_version[0], data->cfg_version[1], data->cfg_version[2]); return 0; err_free_obj_table: mxt_free_object_table(data); err_free_mem: kfree(buf); return error; } static int mxt_pinctrl_init(struct mxt_data *data) { int error; /* Get pinctrl if target uses pinctrl */ data->ts_pinctrl = devm_pinctrl_get((&data->client->dev)); if (IS_ERR_OR_NULL(data->ts_pinctrl)) { dev_dbg(&data->client->dev, "Device does not use pinctrl\n"); error = PTR_ERR(data->ts_pinctrl); data->ts_pinctrl = NULL; return error; } data->gpio_state_active = pinctrl_lookup_state(data->ts_pinctrl, "pmx_ts_active"); if (IS_ERR_OR_NULL(data->gpio_state_active)) { dev_dbg(&data->client->dev, "Can not get ts default pinstate\n"); error = PTR_ERR(data->gpio_state_active); data->ts_pinctrl = NULL; return error; } data->gpio_state_suspend = pinctrl_lookup_state(data->ts_pinctrl, "pmx_ts_suspend"); if (IS_ERR_OR_NULL(data->gpio_state_suspend)) { dev_dbg(&data->client->dev, "Can not get ts sleep pinstate\n"); error = PTR_ERR(data->gpio_state_suspend); data->ts_pinctrl = NULL; return error; } return 0; } static int mxt_pinctrl_select(struct mxt_data *data, bool on) { struct pinctrl_state *pins_state; int error; pins_state = on ? data->gpio_state_active : data->gpio_state_suspend; if (!IS_ERR_OR_NULL(pins_state)) { error = pinctrl_select_state(data->ts_pinctrl, pins_state); if (error) { dev_err(&data->client->dev, "can not set %s pins\n", on ? "pmx_ts_active" : "pmx_ts_suspend"); return error; } } else { dev_err(&data->client->dev, "not a valid '%s' pinstate\n", on ? "pmx_ts_active" : "pmx_ts_suspend"); } return 0; } static int mxt_gpio_enable(struct mxt_data *data, bool enable) { const struct mxt_platform_data *pdata = data->pdata; int error; if (data->ts_pinctrl) { error = mxt_pinctrl_select(data, enable); if (error < 0) return error; } if (enable) { if (gpio_is_valid(pdata->gpio_irq)) { error = gpio_request(pdata->gpio_irq, "maxtouch_gpio_irq"); if (error) { dev_err(&data->client->dev, "unable to request %d gpio(%d)\n", pdata->gpio_irq, error); return error; } error = gpio_direction_input(pdata->gpio_irq); if (error) { dev_err(&data->client->dev, "unable to set dir for %d gpio(%d)\n", data->pdata->gpio_irq, error); goto err_free_irq; } } else { dev_err(&data->client->dev, "irq gpio not provided\n"); return -EINVAL; } if (gpio_is_valid(pdata->gpio_reset)) { error = gpio_request(pdata->gpio_reset, "maxtouch_gpio_reset"); if (error) { dev_err(&data->client->dev, "unable to request %d gpio(%d)\n", pdata->gpio_reset, error); goto err_free_irq; } error = gpio_direction_output(pdata->gpio_reset, 0); if (error) { dev_err(&data->client->dev, "unable to set dir for %d gpio(%d)\n", pdata->gpio_reset, error); goto err_free_reset; } } else { dev_err(&data->client->dev, "reset gpio not provided\n"); goto err_free_irq; } if (gpio_is_valid(pdata->gpio_i2cmode)) { error = gpio_request(pdata->gpio_i2cmode, "maxtouch_gpio_i2cmode"); if (error) { dev_err(&data->client->dev, "unable to request %d gpio (%d)\n", pdata->gpio_i2cmode, error); goto err_free_reset; } error = gpio_direction_output(pdata->gpio_i2cmode, 1); if (error) { dev_err(&data->client->dev, "unable to set dir for %d gpio (%d)\n", pdata->gpio_i2cmode, error); goto err_free_i2cmode; } } else { dev_info(&data->client->dev, "i2cmode gpio is not used\n"); } } else { if (gpio_is_valid(pdata->gpio_irq)) gpio_free(pdata->gpio_irq); if (gpio_is_valid(pdata->gpio_reset)) { gpio_free(pdata->gpio_reset); } if (gpio_is_valid(pdata->gpio_i2cmode)) { gpio_set_value(pdata->gpio_i2cmode, 0); gpio_free(pdata->gpio_i2cmode); } } return 0; err_free_i2cmode: if (gpio_is_valid(pdata->gpio_i2cmode)) { gpio_set_value(pdata->gpio_i2cmode, 0); gpio_free(pdata->gpio_i2cmode); } err_free_reset: if (gpio_is_valid(pdata->gpio_reset)) { gpio_free(pdata->gpio_reset); } err_free_irq: if (gpio_is_valid(pdata->gpio_irq)) gpio_free(pdata->gpio_irq); return error; } static int mxt_regulator_enable(struct mxt_data *data) { int error; if (!data->use_regulator) return 0; gpio_set_value(data->pdata->gpio_reset, 0); error = regulator_enable(data->reg_vdd); if (error) { dev_err(&data->client->dev, "vdd enable failed, error=%d\n", error); return error; } error = regulator_enable(data->reg_avdd); if (error) { dev_err(&data->client->dev, "avdd enable failed, error=%d\n", error); goto err_dis_vdd; } if (!IS_ERR(data->reg_xvdd)) { error = regulator_enable(data->reg_xvdd); if (error) { dev_err(&data->client->dev, "xvdd enable failed, error=%d\n", error); goto err_dis_avdd; } } msleep(MXT_REGULATOR_DELAY); reinit_completion(&data->bl_completion); gpio_set_value(data->pdata->gpio_reset, 1); mxt_wait_for_completion(data, &data->bl_completion, MXT_POWERON_DELAY); return 0; err_dis_avdd: regulator_disable(data->reg_avdd); err_dis_vdd: regulator_disable(data->reg_vdd); return error; } static void mxt_regulator_disable(struct mxt_data *data) { regulator_disable(data->reg_vdd); regulator_disable(data->reg_avdd); if (!IS_ERR(data->reg_xvdd)) regulator_disable(data->reg_xvdd); } static int mxt_regulator_configure(struct mxt_data *data, bool state) { struct device *dev = &data->client->dev; struct device_node *np = dev->of_node; struct property *prop; int error = 0; /* According to maXTouch power sequencing specification, RESET line * must be kept low until some time after regulators come up to * voltage */ if (!data->pdata->gpio_reset) { dev_warn(dev, "Must have reset GPIO to use regulator support\n"); return 0; } if (!state) goto deconfig; data->reg_vdd = regulator_get(dev, "vdd"); if (IS_ERR(data->reg_vdd)) { error = PTR_ERR(data->reg_vdd); dev_err(dev, "Error %d getting vdd regulator\n", error); return error; } if (regulator_count_voltages(data->reg_vdd) > 0) { error = regulator_set_voltage(data->reg_vdd, MXT_VDD_VTG_MIN_UV, MXT_VDD_VTG_MAX_UV); if (error) { dev_err(&data->client->dev, "vdd set_vtg failed err=%d\n", error); goto fail_put_vdd; } } data->reg_avdd = regulator_get(dev, "avdd"); if (IS_ERR(data->reg_avdd)) { error = PTR_ERR(data->reg_avdd); dev_err(dev, "Error %d getting avdd regulator\n", error); goto fail_put_vdd; } if (regulator_count_voltages(data->reg_avdd) > 0) { error = regulator_set_voltage(data->reg_avdd, MXT_AVDD_VTG_MIN_UV, MXT_AVDD_VTG_MAX_UV); if (error) { dev_err(&data->client->dev, "avdd set_vtg failed err=%d\n", error); goto fail_put_avdd; } } data->reg_xvdd = regulator_get(dev, "xvdd"); if (IS_ERR(data->reg_xvdd)) { error = PTR_ERR(data->reg_xvdd); prop = of_find_property(np, "xvdd-supply", NULL); if (prop && (error == -EPROBE_DEFER)) return -EPROBE_DEFER; dev_info(dev, "xvdd regulator is not used\n"); } else { if (regulator_count_voltages(data->reg_xvdd) > 0) { error = regulator_set_voltage(data->reg_xvdd, MXT_XVDD_VTG_MIN_UV, MXT_XVDD_VTG_MAX_UV); if (error) dev_err(&data->client->dev, "xvdd set_vtg failed err=%d\n", error); } } data->use_regulator = true; dev_dbg(dev, "Initialised regulators\n"); return 0; deconfig: if (!IS_ERR(data->reg_xvdd)) regulator_put(data->reg_xvdd); fail_put_avdd: regulator_put(data->reg_avdd); fail_put_vdd: regulator_put(data->reg_vdd); return error; } #if defined(CONFIG_SECURE_TOUCH) static void mxt_secure_touch_stop(struct mxt_data *data, int blocking) { if (atomic_read(&data->st_enabled)) { atomic_set(&data->st_pending_irqs, -1); mxt_secure_touch_notify(data); if (blocking) wait_for_completion_interruptible(&data->st_powerdown); } } #else static void mxt_secure_touch_stop(struct mxt_data *data, int blocking) { } #endif static void mxt_start(struct mxt_data *data) { if (!data->suspended || data->in_bootloader) return; mxt_secure_touch_stop(data, 1); /* enable gpios */ mxt_gpio_enable(data, true); /* enable regulators */ mxt_regulator_enable(data); /* Discard any messages still in message buffer from before * chip went to sleep */ mxt_process_messages_until_invalid(data); mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN); /* Recalibrate since chip has been in deep sleep */ mxt_t6_command(data, MXT_COMMAND_CALIBRATE, 1, false); mxt_acquire_irq(data); data->enable_reporting = true; data->suspended = false; } static void mxt_reset_slots(struct mxt_data *data) { struct input_dev *input_dev = data->input_dev; unsigned int num_mt_slots; int id; num_mt_slots = data->num_touchids + data->num_stylusids; for (id = 0; id < num_mt_slots; id++) { input_mt_slot(input_dev, id); input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 0); } mxt_input_sync(input_dev); } static void mxt_stop(struct mxt_data *data) { if (data->suspended || data->in_bootloader) return; mxt_secure_touch_stop(data, 1); data->enable_reporting = false; disable_irq(data->irq); /* put in deep sleep */ mxt_set_t7_power_cfg(data, MXT_POWER_CFG_DEEPSLEEP); /* disable regulators */ mxt_regulator_disable(data); /* disable gpios */ mxt_gpio_enable(data, false); mxt_reset_slots(data); data->suspended = true; } static int mxt_input_open(struct input_dev *dev) { struct mxt_data *data = input_get_drvdata(dev); mxt_start(data); return 0; } static void mxt_input_close(struct input_dev *dev) { struct mxt_data *data = input_get_drvdata(dev); mxt_stop(data); } static int mxt_create_input_dev(struct mxt_data *data) { struct device *dev = &data->client->dev; struct input_dev *input_dev; int error; unsigned int num_mt_slots; int i; if (data->T9_reportid_min) { error = mxt_update_t9_resolution(data); if (error) { dev_err(dev, "update resolution failed\n"); return error; } } else if (data->T100_reportid_min) { error = mxt_update_t100_resolution(data); if (error) { dev_err(dev, "update resolution failed\n"); return error; } } else { dev_warn(dev, "No touch object detected\n"); } input_dev = input_allocate_device(); if (!input_dev) { dev_err(dev, "Failed to allocate memory\n"); return -ENOMEM; } input_dev->name = "Atmel maXTouch Touchscreen"; input_dev->phys = data->phys; input_dev->id.bustype = BUS_I2C; input_dev->dev.parent = dev; input_dev->open = mxt_input_open; input_dev->close = mxt_input_close; __set_bit(EV_ABS, input_dev->evbit); __set_bit(EV_KEY, input_dev->evbit); __set_bit(BTN_TOUCH, input_dev->keybit); __set_bit(INPUT_PROP_DIRECT, input_dev->propbit); num_mt_slots = data->num_touchids + data->num_stylusids; error = input_mt_init_slots(input_dev, num_mt_slots, 0); if (error) { dev_err(dev, "Error %d initialising slots\n", error); goto err_free_mem; } input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0, MXT_MAX_AREA, 0, 0); input_set_abs_params(input_dev, ABS_MT_POSITION_X, data->pdata->disp_minx, data->pdata->disp_maxx, 0, 0); input_set_abs_params(input_dev, ABS_MT_POSITION_Y, data->pdata->disp_miny, data->pdata->disp_maxy, 0, 0); input_set_abs_params(input_dev, ABS_MT_PRESSURE, 0, 255, 0, 0); input_set_abs_params(input_dev, ABS_MT_ORIENTATION, 0, 255, 0, 0); /* For T63 active stylus */ if (data->T63_reportid_min) { input_set_capability(input_dev, EV_KEY, BTN_STYLUS); input_set_capability(input_dev, EV_KEY, BTN_STYLUS2); input_set_abs_params(input_dev, ABS_MT_TOOL_TYPE, 0, MT_TOOL_MAX, 0, 0); } /* For T15 key array */ if (data->pdata->key_codes && data->T15_reportid_min) { data->t15_keystatus = 0; for (i = 0; i < data->pdata->t15_num_keys; i++) input_set_capability(input_dev, EV_KEY, data->pdata->t15_keymap[i]); } input_set_drvdata(input_dev, data); error = input_register_device(input_dev); if (error) { dev_err(dev, "Error %d registering input device\n", error); goto err_free_mem; } data->input_dev = input_dev; return 0; err_free_mem: input_free_device(input_dev); return error; } static int mxt_configure_objects(struct mxt_data *data) { struct i2c_client *client = data->client; int error; error = mxt_debug_msg_init(data); if (error) return error; error = mxt_init_t7_power_cfg(data); if (error) dev_dbg(&client->dev, "Failed to initialize power cfg\n"); return 0; } #ifdef CONFIG_OF static int mxt_get_dt_coords(struct device *dev, char *name, struct mxt_platform_data *pdata) { u32 coords[MXT_COORDS_ARR_SIZE]; struct property *prop; struct device_node *np = dev->of_node; size_t coords_size; int error; prop = of_find_property(np, name, NULL); if (!prop) return -EINVAL; if (!prop->value) return -ENODATA; coords_size = prop->length / sizeof(u32); if (coords_size != MXT_COORDS_ARR_SIZE) { dev_err(dev, "invalid %s\n", name); return -EINVAL; } error = of_property_read_u32_array(np, name, coords, coords_size); if (error && (error != -EINVAL)) { dev_err(dev, "Unable to read %s\n", name); return error; } if (strcmp(name, "atmel,panel-coords") == 0) { pdata->panel_minx = coords[0]; pdata->panel_miny = coords[1]; pdata->panel_maxx = coords[2]; pdata->panel_maxy = coords[3]; } else if (strcmp(name, "atmel,display-coords") == 0) { pdata->disp_minx = coords[0]; pdata->disp_miny = coords[1]; pdata->disp_maxx = coords[2]; pdata->disp_maxy = coords[3]; } else { dev_err(dev, "unsupported property %s\n", name); return -EINVAL; } return 0; } static int mxt_search_fw_name(struct mxt_data *data) { struct device *dev = &data->client->dev; struct device_node *np = dev->of_node, *temp; u32 temp_val; size_t len; int rc; data->fw_name[0] = '\0'; if (data->in_bootloader) return 0; for_each_child_of_node(np, temp) { rc = of_property_read_u32(temp, "atmel,version", &temp_val); if (rc) { dev_err(dev, "Unable to read controller version\n"); return rc; } if (temp_val != data->info->version) continue; rc = of_property_read_u32(temp, "atmel,build", &temp_val); if (rc) { dev_err(dev, "Unable to read build id\n"); return rc; } if (temp_val != data->info->build) continue; rc = of_property_read_string(temp, "atmel,fw-name", &data->pdata->fw_name); if (rc && (rc != -EINVAL)) { dev_err(dev, "Unable to read fw name\n"); return rc; } dev_dbg(dev, "fw name found(%s)\n", data->pdata->fw_name); if (data->pdata->fw_name) { len = strlen(data->pdata->fw_name); if (len > MXT_NAME_MAX_LEN - 1) { dev_err(dev, "Invalid firmware name\n"); return -EINVAL; } strlcpy(data->fw_name, data->pdata->fw_name, len + 1); } } return 0; } static int mxt_parse_dt(struct device *dev, struct mxt_platform_data *pdata) { int error; u32 temp_val; struct device_node *np = dev->of_node; struct property *prop; error = mxt_get_dt_coords(dev, "atmel,panel-coords", pdata); if (error) return error; error = mxt_get_dt_coords(dev, "atmel,display-coords", pdata); if (error) return error; pdata->cfg_name = MXT_GEN_CFG; error = of_property_read_string(np, "atmel,cfg-name", &pdata->cfg_name); if (error && (error != -EINVAL)) { dev_err(dev, "Unable to read cfg name\n"); return error; } /* reset, irq gpio info */ pdata->gpio_reset = of_get_named_gpio_flags(np, "atmel,reset-gpio", 0, &temp_val); pdata->resetflags = temp_val; pdata->gpio_irq = of_get_named_gpio_flags(np, "atmel,irq-gpio", 0, &temp_val); pdata->irqflags = temp_val; pdata->gpio_i2cmode = of_get_named_gpio_flags(np, "atmel,i2cmode-gpio", 0, &temp_val); pdata->ignore_crc = of_property_read_bool(np, "atmel,ignore-crc"); error = of_property_read_u32(np, "atmel,bl-addr", &temp_val); if (error && (error != -EINVAL)) dev_err(dev, "Unable to read bootloader address\n"); else if (error != -EINVAL) pdata->bl_addr = (u8) temp_val; /* keycodes for keyarray object */ prop = of_find_property(np, "atmel,key-codes", NULL); if (prop) { pdata->key_codes = devm_kzalloc(dev, sizeof(int) * MXT_KEYARRAY_MAX_KEYS, GFP_KERNEL); if (!pdata->key_codes) return -ENOMEM; if ((prop->length/sizeof(u32)) == MXT_KEYARRAY_MAX_KEYS) { error = of_property_read_u32_array(np, "atmel,key-codes", pdata->key_codes, MXT_KEYARRAY_MAX_KEYS); if (error) { dev_err(dev, "Unable to read key codes\n"); return error; } } else return -EINVAL; } return 0; } #else static int mxt_parse_dt(struct device *dev, struct mxt_platform_data *pdata) { return -ENODEV; } static int mxt_search_fw_name(struct mxt_data *data) { return -ENODEV; } #endif static int mxt_initialize(struct mxt_data *data) { struct i2c_client *client = data->client; int error; bool alt_bootloader_addr = false; bool retry = false; retry_info: error = mxt_read_info_block(data); if (error) { retry_bootloader: error = mxt_probe_bootloader(data, alt_bootloader_addr); if (error) { if (alt_bootloader_addr) { /* Chip is not in appmode or bootloader mode */ return error; } dev_info(&client->dev, "Trying alternate bootloader address\n"); alt_bootloader_addr = true; goto retry_bootloader; } else { if (retry) { dev_err(&client->dev, "Could not recover device from " "bootloader mode\n"); /* this is not an error state, we can reflash * from here */ data->in_bootloader = true; goto recover_bootloader; } /* Attempt to exit bootloader into app mode */ mxt_send_bootloader_cmd(data, false); msleep(MXT_FW_RESET_TIME); retry = true; goto retry_info; } } error = mxt_check_retrigen(data); if (error) return error; error = mxt_acquire_irq(data); if (error) return error; error = mxt_configure_objects(data); if (error) return error; recover_bootloader: error = mxt_create_input_dev(data); if (error) { dev_err(&client->dev, "Failed to create input dev\n"); return error; } data->enable_reporting = true; error = mxt_search_fw_name(data); if (error) dev_dbg(&client->dev, "firmware name search fail\n"); return 0; } /* Firmware Version is returned as Major.Minor.Build */ static ssize_t mxt_fw_version_show(struct device *dev, struct device_attribute *attr, char *buf) { struct mxt_data *data = dev_get_drvdata(dev); return scnprintf(buf, PAGE_SIZE, "%u.%u.%02X\n", data->info->version >> 4, data->info->version & 0xf, data->info->build); } /* Hardware Version is returned as FamilyID.VariantID */ static ssize_t mxt_hw_version_show(struct device *dev, struct device_attribute *attr, char *buf) { struct mxt_data *data = dev_get_drvdata(dev); return scnprintf(buf, PAGE_SIZE, "%u.%u\n", data->info->family_id, data->info->variant_id); } /* Hardware Version is returned as FamilyID.VariantID */ static ssize_t mxt_cfg_version_show(struct device *dev, struct device_attribute *attr, char *buf) { struct mxt_data *data = dev_get_drvdata(dev); return scnprintf(buf, PAGE_SIZE, "%u.%u.%u\n", data->cfg_version[0], data->cfg_version[1], data->cfg_version[2]); } static ssize_t mxt_show_instance(char *buf, int count, struct mxt_object *object, int instance, const u8 *val) { int i; if (mxt_obj_instances(object) > 1) count += scnprintf(buf + count, PAGE_SIZE - count, "Instance %u\n", instance); for (i = 0; i < mxt_obj_size(object); i++) count += scnprintf(buf + count, PAGE_SIZE - count, "\t[%2u]: %02x (%d)\n", i, val[i], val[i]); count += scnprintf(buf + count, PAGE_SIZE - count, "\n"); return count; } static ssize_t mxt_object_show(struct device *dev, struct device_attribute *attr, char *buf) { struct mxt_data *data = dev_get_drvdata(dev); struct mxt_object *object; int count = 0; int i, j; int error; u8 *obuf; /* Pre-allocate buffer large enough to hold max sized object. */ obuf = kmalloc(256, GFP_KERNEL); if (!obuf) return -ENOMEM; error = 0; for (i = 0; i < data->info->object_num; i++) { object = data->object_table + i; if (!mxt_object_readable(object->type)) continue; count += scnprintf(buf + count, PAGE_SIZE - count, "T%u:\n", object->type); for (j = 0; j < mxt_obj_instances(object); j++) { u16 size = mxt_obj_size(object); u16 addr = object->start_address + j * size; error = __mxt_read_reg(data->client, addr, size, obuf); if (error) goto done; count = mxt_show_instance(buf, count, object, j, obuf); } } done: kfree(obuf); return error ?: count; } static int mxt_check_firmware_format(struct device *dev, const struct firmware *fw) { unsigned int pos = 0; char c; while (pos < fw->size) { c = *(fw->data + pos); if (c < '0' || (c > '9' && c < 'A') || c > 'F') return 0; pos++; } /* To convert file try * xxd -r -p mXTXXX__APP_VX-X-XX.enc > maxtouch.fw */ dev_err(dev, "Aborting: firmware file must be in binary format\n"); return -1; } static int mxt_load_fw(struct device *dev) { struct mxt_data *data = dev_get_drvdata(dev); const struct firmware *fw = NULL; unsigned int frame_size; unsigned int pos = 0; unsigned int retry = 0; unsigned int frame = 0; int ret; ret = request_firmware(&fw, data->fw_name, dev); if (ret) { dev_err(dev, "Unable to open firmware %s\n", data->fw_name); return ret; } /* Check for incorrect enc file */ ret = mxt_check_firmware_format(dev, fw); if (ret) goto release_firmware; if (data->suspended) { if (data->use_regulator) mxt_regulator_enable(data); enable_irq(data->irq); data->suspended = false; } if (!data->in_bootloader) { /* Change to the bootloader mode */ data->in_bootloader = true; ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_BOOT_VALUE, false); if (ret) goto release_firmware; msleep(MXT_RESET_TIME); /* At this stage, do not need to scan since we know * family ID */ ret = mxt_lookup_bootloader_address(data, 0); if (ret) goto release_firmware; } else { enable_irq(data->irq); } mxt_free_object_table(data); reinit_completion(&data->bl_completion); ret = mxt_check_bootloader(data, MXT_WAITING_BOOTLOAD_CMD, false); if (ret) { /* Bootloader may still be unlocked from previous update * attempt */ ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, false); if (ret) goto disable_irq; } else { dev_info(dev, "Unlocking bootloader\n"); /* Unlock bootloader */ ret = mxt_send_bootloader_cmd(data, true); if (ret) goto disable_irq; } while (pos < fw->size) { ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, true); if (ret) goto disable_irq; frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1)); /* Take account of CRC bytes */ frame_size += 2; /* Write one frame to device */ ret = mxt_bootloader_write(data, fw->data + pos, frame_size); if (ret) goto disable_irq; ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS, true); if (ret) { retry++; /* Back off by 20ms per retry */ msleep(retry * 20); if (retry > 20) { dev_err(dev, "Retry count exceeded\n"); goto disable_irq; } } else { retry = 0; pos += frame_size; frame++; } if (frame % 50 == 0) dev_info(dev, "Sent %d frames, %d/%zd bytes\n", frame, pos, fw->size); } /* Wait for flash. */ ret = mxt_wait_for_completion(data, &data->bl_completion, MXT_FW_RESET_TIME); if (ret) goto disable_irq; dev_info(dev, "Sent %d frames, %u bytes\n", frame, pos); /* Wait for device to reset. Some bootloader versions do not assert * the CHG line after bootloading has finished, so ignore error */ mxt_wait_for_completion(data, &data->bl_completion, MXT_FW_RESET_TIME); data->in_bootloader = false; disable_irq: disable_irq(data->irq); release_firmware: release_firmware(fw); return ret; } static ssize_t mxt_update_fw_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct mxt_data *data = dev_get_drvdata(dev); int error; if (data->fw_name[0] == '\0') { if (data->in_bootloader) dev_info(dev, "Manual update needed\n"); else dev_info(dev, "firmware is up-to-date\n"); return count; } error = mxt_load_fw(dev); if (error) { dev_err(dev, "The firmware update failed(%d)\n", error); count = error; } else { dev_info(dev, "The firmware update succeeded\n"); msleep(MXT_FW_RESET_TIME); data->suspended = false; error = mxt_initialize(data); if (error) return error; data->fw_w_no_cfg_update = true; } return count; } static int mxt_update_cfg(struct mxt_data *data, bool force) { int ret; if (data->in_bootloader) { dev_err(&data->client->dev, "Not in appmode\n"); return -EINVAL; } data->enable_reporting = false; if (data->suspended) { if (data->use_regulator) mxt_regulator_enable(data); mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN); mxt_acquire_irq(data); data->suspended = false; } /* load config */ ret = mxt_load_cfg(data, force); if (ret) return ret; return 0; } static ssize_t mxt_update_cfg_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct mxt_data *data = dev_get_drvdata(dev); int ret; /* update config */ ret = mxt_update_cfg(data, false); if (ret) return ret; return count; } static ssize_t mxt_force_update_cfg_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct mxt_data *data = dev_get_drvdata(dev); int ret; /* update force config */ ret = mxt_update_cfg(data, true); if (ret) return ret; return count; } static ssize_t mxt_debug_enable_show(struct device *dev, struct device_attribute *attr, char *buf) { struct mxt_data *data = dev_get_drvdata(dev); char c; c = data->debug_enabled ? '1' : '0'; return scnprintf(buf, PAGE_SIZE, "%c\n", c); } static ssize_t mxt_debug_notify_show(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "0\n"); } static ssize_t mxt_debug_v2_enable_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct mxt_data *data = dev_get_drvdata(dev); int i; if (sscanf(buf, "%u", &i) == 1 && i < 2) { if (i == 1) mxt_debug_msg_enable(data); else mxt_debug_msg_disable(data); return count; } else { dev_dbg(dev, "debug_enabled write error\n"); return -EINVAL; } } static ssize_t mxt_debug_enable_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct mxt_data *data = dev_get_drvdata(dev); int i; if (sscanf(buf, "%u", &i) == 1 && i < 2) { data->debug_enabled = (i == 1); dev_dbg(dev, "%s\n", i ? "debug enabled" : "debug disabled"); return count; } else { dev_dbg(dev, "debug_enabled write error\n"); return -EINVAL; } } static int mxt_check_mem_access_params(struct mxt_data *data, loff_t off, size_t *count) { if (off >= data->mem_size) return -EIO; if (off + *count > data->mem_size) *count = data->mem_size - off; if (*count > MXT_MAX_BLOCK_WRITE) *count = MXT_MAX_BLOCK_WRITE; return 0; } static ssize_t mxt_mem_access_read(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) { struct device *dev = container_of(kobj, struct device, kobj); struct mxt_data *data = dev_get_drvdata(dev); int ret = 0; ret = mxt_check_mem_access_params(data, off, &count); if (ret < 0) return ret; if (count > 0) ret = __mxt_read_reg(data->client, off, count, buf); return ret == 0 ? count : ret; } static ssize_t mxt_mem_access_write(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) { struct device *dev = container_of(kobj, struct device, kobj); struct mxt_data *data = dev_get_drvdata(dev); int ret = 0; ret = mxt_check_mem_access_params(data, off, &count); if (ret < 0) return ret; if (count > 0) ret = __mxt_write_reg(data->client, off, count, buf); return ret == 0 ? count : 0; } #if defined(CONFIG_SECURE_TOUCH) static int mxt_secure_touch_clk_prepare_enable( struct mxt_data *data) { int ret; ret = clk_prepare_enable(data->iface_clk); if (ret) { dev_err(&data->client->dev, "error on clk_prepare_enable(iface_clk):%d\n", ret); return ret; } ret = clk_prepare_enable(data->core_clk); if (ret) { clk_disable_unprepare(data->iface_clk); dev_err(&data->client->dev, "error clk_prepare_enable(core_clk):%d\n", ret); } return ret; } static void mxt_secure_touch_clk_disable_unprepare( struct mxt_data *data) { clk_disable_unprepare(data->core_clk); clk_disable_unprepare(data->iface_clk); } static ssize_t mxt_secure_touch_enable_show(struct device *dev, struct device_attribute *attr, char *buf) { struct mxt_data *data = dev_get_drvdata(dev); return scnprintf(buf, PAGE_SIZE, "%d", atomic_read(&data->st_enabled)); } /* * Accept only "0" and "1" valid values. * "0" will reset the st_enabled flag, then wake up the reading process. * The bus driver is notified via pm_runtime that it is not required to stay * awake anymore. * It will also make sure the queue of events is emptied in the controller, * in case a touch happened in between the secure touch being disabled and * the local ISR being ungated. * "1" will set the st_enabled flag and clear the st_pending_irqs flag. * The bus driver is requested via pm_runtime to stay awake. */ static ssize_t mxt_secure_touch_enable_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct mxt_data *data = dev_get_drvdata(dev); struct device *adapter = data->client->adapter->dev.parent; unsigned long value; int err = 0; if (count > 2) return -EINVAL; err = kstrtoul(buf, 10, &value); if (err != 0) return err; if (!data->st_initialized) return -EIO; err = count; switch (value) { case 0: if (atomic_read(&data->st_enabled) == 0) break; mxt_secure_touch_clk_disable_unprepare(data); pm_runtime_put_sync(adapter); atomic_set(&data->st_enabled, 0); mxt_secure_touch_notify(data); mxt_interrupt(data->client->irq, data); complete(&data->st_powerdown); break; case 1: if (atomic_read(&data->st_enabled)) { err = -EBUSY; break; } if (pm_runtime_get_sync(adapter) < 0) { dev_err(&data->client->dev, "pm_runtime_get failed\n"); err = -EIO; break; } if (mxt_secure_touch_clk_prepare_enable(data) < 0) { pm_runtime_put_sync(adapter); err = -EIO; break; } reinit_completion(&data->st_powerdown); atomic_set(&data->st_enabled, 1); synchronize_irq(data->client->irq); atomic_set(&data->st_pending_irqs, 0); break; default: dev_err(&data->client->dev, "unsupported value: %lu\n", value); err = -EINVAL; break; } return err; } static ssize_t mxt_secure_touch_show(struct device *dev, struct device_attribute *attr, char *buf) { struct mxt_data *data = dev_get_drvdata(dev); int val = 0; if (atomic_read(&data->st_enabled) == 0) return -EBADF; if (atomic_cmpxchg(&data->st_pending_irqs, -1, 0) == -1) return -EINVAL; if (atomic_cmpxchg(&data->st_pending_irqs, 1, 0) == 1) val = 1; return scnprintf(buf, PAGE_SIZE, "%u", val); } static DEVICE_ATTR(secure_touch_enable, S_IRUGO | S_IWUSR | S_IWGRP , mxt_secure_touch_enable_show, mxt_secure_touch_enable_store); static DEVICE_ATTR(secure_touch, S_IRUGO, mxt_secure_touch_show, NULL); #endif static ssize_t mxt_fw_name_show(struct device *dev, struct device_attribute *attr, char *buf) { struct mxt_data *data = dev_get_drvdata(dev); return snprintf(buf, MXT_NAME_MAX_LEN - 1, "%s\n", data->fw_name); } static ssize_t mxt_fw_name_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { struct mxt_data *data = dev_get_drvdata(dev); if (size > MXT_NAME_MAX_LEN - 1) return -EINVAL; strlcpy(data->fw_name, buf, size); if (data->fw_name[size-1] == '\n') data->fw_name[size-1] = 0; return size; } static ssize_t mxt_cfg_name_show(struct device *dev, struct device_attribute *attr, char *buf) { struct mxt_data *data = dev_get_drvdata(dev); return snprintf(buf, MXT_NAME_MAX_LEN - 1, "%s\n", data->cfg_name); } static ssize_t mxt_cfg_name_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { struct mxt_data *data = dev_get_drvdata(dev); if (size > MXT_NAME_MAX_LEN - 1) return -EINVAL; strlcpy(data->cfg_name, buf, size); if (data->cfg_name[size-1] == '\n') data->cfg_name[size-1] = 0; return size; } static DEVICE_ATTR(fw_name, S_IWUSR | S_IRUSR, mxt_fw_name_show, mxt_fw_name_store); static DEVICE_ATTR(cfg_name, S_IWUSR | S_IRUSR, mxt_cfg_name_show, mxt_cfg_name_store); static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL); static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL); static DEVICE_ATTR(cfg_version, S_IRUGO, mxt_cfg_version_show, NULL); static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL); static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store); static DEVICE_ATTR(update_cfg, S_IWUSR, NULL, mxt_update_cfg_store); static DEVICE_ATTR(force_update_cfg, S_IWUSR, NULL, mxt_force_update_cfg_store); static DEVICE_ATTR(debug_v2_enable, S_IWUSR | S_IRUSR, NULL, mxt_debug_v2_enable_store); static DEVICE_ATTR(debug_notify, S_IRUGO, mxt_debug_notify_show, NULL); static DEVICE_ATTR(debug_enable, S_IWUSR | S_IRUSR, mxt_debug_enable_show, mxt_debug_enable_store); static struct attribute *mxt_attrs[] = { &dev_attr_fw_name.attr, &dev_attr_cfg_name.attr, &dev_attr_fw_version.attr, &dev_attr_hw_version.attr, &dev_attr_cfg_version.attr, &dev_attr_object.attr, &dev_attr_update_fw.attr, &dev_attr_update_cfg.attr, &dev_attr_force_update_cfg.attr, &dev_attr_debug_enable.attr, &dev_attr_debug_v2_enable.attr, &dev_attr_debug_notify.attr, #if defined(CONFIG_SECURE_TOUCH) &dev_attr_secure_touch_enable.attr, &dev_attr_secure_touch.attr, #endif NULL }; static const struct attribute_group mxt_attr_group = { .attrs = mxt_attrs, }; #ifdef CONFIG_PM_SLEEP static int mxt_suspend(struct device *dev) { struct mxt_data *data = dev_get_drvdata(dev); struct input_dev *input_dev = data->input_dev; mutex_lock(&input_dev->mutex); if (input_dev->users) mxt_stop(data); mutex_unlock(&input_dev->mutex); return 0; } static int mxt_resume(struct device *dev) { struct mxt_data *data = dev_get_drvdata(dev); struct input_dev *input_dev = data->input_dev; mxt_secure_touch_stop(data, 1); mutex_lock(&input_dev->mutex); if (input_dev->users) mxt_start(data); mutex_unlock(&input_dev->mutex); return 0; } #if defined(CONFIG_FB) static int fb_notifier_callback(struct notifier_block *self, unsigned long event, void *data) { struct fb_event *evdata = data; int *blank; struct mxt_data *mxt_dev_data = container_of(self, struct mxt_data, fb_notif); if (evdata && evdata->data && mxt_dev_data && mxt_dev_data->client) { if (event == FB_EARLY_EVENT_BLANK) mxt_secure_touch_stop(mxt_dev_data, 0); else if (event == FB_EVENT_BLANK) { blank = evdata->data; if (*blank == FB_BLANK_UNBLANK) mxt_resume(&mxt_dev_data->client->dev); else if (*blank == FB_BLANK_POWERDOWN) mxt_suspend(&mxt_dev_data->client->dev); } } return 0; } #elif defined(CONFIG_HAS_EARLYSUSPEND) static void mxt_early_suspend(struct early_suspend *h) { struct mxt_data *data = container_of(h, struct mxt_data, early_suspend); mxt_suspend(&data->client->dev); } static void mxt_late_resume(struct early_suspend *h) { struct mxt_data *data = container_of(h, struct mxt_data, early_suspend); mxt_resume(&data->client->dev); } #endif static const struct dev_pm_ops mxt_pm_ops = { #if (!defined(CONFIG_FB) && !defined(CONFIG_HAS_EARLYSUSPEND)) .suspend = mxt_suspend, .resume = mxt_resume, #endif }; #endif #if defined(CONFIG_SECURE_TOUCH) static void mxt_secure_touch_init(struct mxt_data *data) { int ret = 0; data->st_initialized = 0; init_completion(&data->st_powerdown); /* Get clocks */ data->core_clk = clk_get(&data->client->dev, "core_clk"); if (IS_ERR(data->core_clk)) { ret = PTR_ERR(data->core_clk); dev_err(&data->client->dev, "%s: error on clk_get(core_clk):%d\n", __func__, ret); return; } data->iface_clk = clk_get(&data->client->dev, "iface_clk"); if (IS_ERR(data->iface_clk)) { ret = PTR_ERR(data->iface_clk); dev_err(&data->client->dev, "%s: error on clk_get(iface_clk):%d\n", __func__, ret); goto err_iface_clk; } data->st_initialized = 1; return; err_iface_clk: clk_put(data->core_clk); data->core_clk = NULL; } #else static void mxt_secure_touch_init(struct mxt_data *data) { } #endif static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct mxt_data *data; struct mxt_platform_data *pdata; int error, len; if (client->dev.of_node) { pdata = devm_kzalloc(&client->dev, sizeof(struct mxt_platform_data), GFP_KERNEL); if (!pdata) { dev_err(&client->dev, "Failed to allocate memory\n"); return -ENOMEM; } error = mxt_parse_dt(&client->dev, pdata); if (error) return error; } else pdata = client->dev.platform_data; if (!pdata) return -EINVAL; data = devm_kzalloc(&client->dev, sizeof(struct mxt_data), GFP_KERNEL); if (!data) { dev_err(&client->dev, "Failed to allocate memory\n"); return -ENOMEM; } snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0", client->adapter->nr, client->addr); data->client = client; data->irq = client->irq; data->pdata = pdata; i2c_set_clientdata(client, data); init_completion(&data->bl_completion); init_completion(&data->reset_completion); init_completion(&data->crc_completion); mutex_init(&data->debug_msg_lock); if (data->pdata->cfg_name) { len = strlen(data->pdata->cfg_name); if (len > MXT_NAME_MAX_LEN - 1) { dev_err(&client->dev, "Invalid config name\n"); goto err_destroy_mutex; } strlcpy(data->cfg_name, data->pdata->cfg_name, len + 1); } error = mxt_pinctrl_init(data); if (error) dev_info(&client->dev, "No pinctrl support\n"); error = mxt_gpio_enable(data, true); if (error) { dev_err(&client->dev, "Failed to configure gpios\n"); goto err_destroy_mutex; } data->irq = data->client->irq = gpio_to_irq(data->pdata->gpio_irq); error = mxt_regulator_configure(data, true); if (error) { dev_err(&client->dev, "Failed to probe regulators\n"); goto err_free_gpios; } error = mxt_regulator_enable(data); if (error) { dev_err(&client->dev, "Error %d enabling regulators\n", error); goto err_put_regs; } error = mxt_initialize(data); if (error) goto err_free_regs; error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group); if (error) { dev_err(&client->dev, "Failure %d creating sysfs group\n", error); goto err_free_object; } sysfs_bin_attr_init(&data->mem_access_attr); data->mem_access_attr.attr.name = "mem_access"; data->mem_access_attr.attr.mode = S_IRUGO | S_IWUSR; data->mem_access_attr.read = mxt_mem_access_read; data->mem_access_attr.write = mxt_mem_access_write; data->mem_access_attr.size = data->mem_size; if (sysfs_create_bin_file(&client->dev.kobj, &data->mem_access_attr) < 0) { dev_err(&client->dev, "Failed to create %s\n", data->mem_access_attr.attr.name); goto err_remove_sysfs_group; } error = request_threaded_irq(data->irq, NULL, mxt_interrupt, data->pdata->irqflags | IRQF_ONESHOT, client->name, data); if (error) { dev_err(&client->dev, "Failed to register interrupt\n"); goto err_remove_sysfs_group; } #if defined(CONFIG_FB) data->fb_notif.notifier_call = fb_notifier_callback; error = fb_register_client(&data->fb_notif); if (error) { dev_err(&client->dev, "Unable to register fb_notifier: %d\n", error); goto err_free_irq; } #elif defined(CONFIG_HAS_EARLYSUSPEND) data->early_suspend.level = EARLY_SUSPEND_LEVEL_BLANK_SCREEN + MXT_SUSPEND_LEVEL; data->early_suspend.suspend = mxt_early_suspend; data->early_suspend.resume = mxt_late_resume; register_early_suspend(&data->early_suspend); #endif mxt_secure_touch_init(data); return 0; err_free_irq: free_irq(data->irq, data); err_remove_sysfs_group: sysfs_remove_group(&client->dev.kobj, &mxt_attr_group); err_free_object: mxt_free_object_table(data); err_put_regs: mxt_regulator_configure(data, false); err_free_regs: mxt_regulator_disable(data); err_free_gpios: mxt_gpio_enable(data, false); err_destroy_mutex: mutex_destroy(&data->debug_msg_lock); return error; } static int mxt_remove(struct i2c_client *client) { struct mxt_data *data = i2c_get_clientdata(client); if (data->mem_access_attr.attr.name) sysfs_remove_bin_file(&client->dev.kobj, &data->mem_access_attr); #if defined(CONFIG_FB) fb_unregister_client(&data->fb_notif); #elif defined(CONFIG_HAS_EARLYSUSPEND) unregister_early_suspend(&data->early_suspend); #endif sysfs_remove_group(&client->dev.kobj, &mxt_attr_group); free_irq(data->irq, data); mxt_regulator_configure(data, false); mxt_regulator_disable(data); if (!IS_ERR(data->reg_xvdd)) regulator_put(data->reg_xvdd); regulator_put(data->reg_avdd); regulator_put(data->reg_vdd); mxt_free_object_table(data); if (!dev_get_platdata(&data->client->dev)) kfree(data->pdata); kfree(data); return 0; } static void mxt_shutdown(struct i2c_client *client) { struct mxt_data *data = i2c_get_clientdata(client); disable_irq(data->irq); } static const struct i2c_device_id mxt_id[] = { { "qt602240_ts", 0 }, { "atmel_mxt_ts", 0 }, { "atmel_maxtouch_ts", 0 }, { "atmel_mxt_tp", 0 }, { "mXT224", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, mxt_id); #ifdef CONFIG_OF static struct of_device_id mxt_match_table[] = { { .compatible = "atmel,maxtouch-ts",}, { }, }; #else #define mxt_match_table NULL #endif static struct i2c_driver mxt_driver = { .driver = { .name = "atmel_maxtouch_ts", .owner = THIS_MODULE, #ifdef CONFIG_PM_SLEEP .pm = &mxt_pm_ops, #endif .of_match_table = mxt_match_table, }, .probe = mxt_probe, .remove = mxt_remove, .shutdown = mxt_shutdown, .id_table = mxt_id, }; static int __init mxt_init(void) { return i2c_add_driver(&mxt_driver); } static void __exit mxt_exit(void) { i2c_del_driver(&mxt_driver); } late_initcall(mxt_init); module_exit(mxt_exit); /* Module information */ MODULE_AUTHOR("Joonyoung Shim "); MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver"); MODULE_LICENSE("GPL");