/* * Atmel maXTouch Touchscreen driver * * Copyright (C) 2010 Samsung Electronics Co.Ltd * Copyright (C) 2011-2014 Atmel Corporation * Copyright (C) 2012 Google, Inc. * Copyright (C) 2011-2017, NVIDIA CORPORATION. All rights reserved. * * 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 #include #include #include #include #include /* 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 255 /* 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_SPT_DYNAMICCONFIGURATIONCONTAINER_T71 71 #define MXT_PROCI_SYMBOLGESTUREPROCESSOR 92 #define MXT_PROCI_TOUCHSEQUENCELOGGER 93 #define MXT_TOUCH_MULTITOUCHSCREEN_T100 100 #define MXT_PROCI_ACTIVESTYLUS_T107 107 /* 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 BIT(7) #define MXT_T6_STATUS_OFL BIT(6) #define MXT_T6_STATUS_SIGERR BIT(5) #define MXT_T6_STATUS_CAL BIT(4) #define MXT_T6_STATUS_CFGERR BIT(3) #define MXT_T6_STATUS_COMSERR BIT(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_CTRL 0 #define MXT_T9_ORIENT 9 #define MXT_T9_RANGE 18 /* MXT_TOUCH_MULTI_T9 status */ #define MXT_T9_UNGRIP BIT(0) #define MXT_T9_SUPPRESS BIT(1) #define MXT_T9_AMP BIT(2) #define MXT_T9_VECTOR BIT(3) #define MXT_T9_MOVE BIT(4) #define MXT_T9_RELEASE BIT(5) #define MXT_T9_PRESS BIT(6) #define MXT_T9_DETECT BIT(7) struct t9_range { __le16 x; __le16 y; } __packed; /* MXT_TOUCH_MULTI_T9 orient */ #define MXT_T9_ORIENT_SWITCH BIT(0) /* MXT_SPT_COMMSCONFIG_T18 */ #define MXT_COMMS_CTRL 0 #define MXT_COMMS_CMD 1 #define MXT_COMMS_RETRIGEN BIT(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 BIT(0) /* 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 BIT(5) #define MXT_T100_TCHAUX_VECT BIT(0) #define MXT_T100_TCHAUX_AMPL BIT(1) #define MXT_T100_TCHAUX_AREA BIT(2) #define MXT_T100_DETECT BIT(7) #define MXT_T100_TYPE_MASK 0x70 enum t100_type { MXT_T100_TYPE_FINGER = 1, MXT_T100_TYPE_PASSIVE_STYLUS = 2, MXT_T100_TYPE_ACTIVE_STYLUS = 3, MXT_T100_TYPE_HOVERING_FINGER = 4, MXT_T100_TYPE_GLOVE = 5, MXT_T100_TYPE_LARGE_TOUCH = 6, }; #define MXT_DISTANCE_ACTIVE_TOUCH 0 #define MXT_DISTANCE_HOVERING 1 #define MXT_TOUCH_MAJOR_DEFAULT 1 #define MXT_PRESSURE_DEFAULT 1 /* Gen2 Active Stylus */ #define MXT_T107_STYLUS_STYAUX 42 #define MXT_T107_STYLUS_STYAUX_PRESSURE BIT(0) #define MXT_T107_STYLUS_STYAUX_PEAK BIT(4) #define MXT_T107_STYLUS_HOVER BIT(0) #define MXT_T107_STYLUS_TIPSWITCH BIT(1) #define MXT_T107_STYLUS_BUTTON0 BIT(2) #define MXT_T107_STYLUS_BUTTON1 BIT(3) /* 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_CHG_DELAY 100 /* msec */ #define MXT_POWERON_DELAY 150 /* msec */ #define MXT_BOOTLOADER_WAIT 36E5 /* 1 minute */ /* 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 BIT(5) #define MXT_BOOT_ID_MASK 0x1f /* Touchscreen absolute values */ #define MXT_MAX_AREA 0xff #define MXT_PIXELS_PER_MM 20 #define DEBUG_MSG_MAX 200 struct mxt_info { u8 family_id; u8 variant_id; u8 version; u8 build; u8 matrix_xsize; u8 matrix_ysize; u8 object_num; }; struct mxt_object { u8 type; u16 start_address; u8 size_minus_one; u8 instances_minus_one; u8 num_report_ids; } __packed; /* Firmware frame structure */ struct mxt_fw_frame { __be16 size; u8 data[]; }; /* Config update context */ struct mxt_cfg { u8 *raw; size_t raw_size; off_t raw_pos; u8 *mem; size_t mem_size; int start_ofs; struct mxt_info info; }; /* Firmware update context */ struct mxt_flash { struct mxt_data *data; const struct firmware *fw; struct mxt_fw_frame *frame; loff_t pos; size_t frame_size; unsigned int count; unsigned int retry; u8 previous; struct completion flash_completion; struct delayed_work work; }; /* Each client has this additional data */ struct mxt_data { struct i2c_client *client; struct input_dev *input_dev; char phys[64]; /* device physical location */ const 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 xy_switch; 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; u8 *msg_buf; u8 t6_status; bool update_input; u8 last_message_count; u8 num_touchids; u8 multitouch; struct t7_config t7_cfg; unsigned long t15_keystatus; u8 stylus_aux_pressure; u8 stylus_aux_peak; bool use_retrigen_workaround; struct regulator *reg_vdd; struct regulator *reg_avdd; char *fw_name; char *cfg_name; struct mxt_flash *flash; /* Cached parameters from object table */ u16 T5_address; u8 T5_msg_size; u8 T6_reportid; u16 T6_address; u16 T7_address; u16 T71_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; u16 T92_address; u8 T92_reportid; u16 T93_address; u8 T93_reportid; u8 T100_reportid_min; u8 T100_reportid_max; u16 T107_address; /* for reset handling */ struct completion reset_completion; /* for config update handling */ struct completion crc_completion; /* for power up handling */ struct completion chg_completion; /* Indicates whether device is in suspend */ bool suspended; /* Indicates whether device is updating configuration */ bool updating_config; /* Indicates whether device is initialized */ bool initialized; }; static size_t mxt_obj_size(const struct mxt_object *obj) { return obj->size_minus_one + 1; } static size_t mxt_obj_instances(const struct mxt_object *obj) { return obj->instances_minus_one + 1; } static bool mxt_object_readable(unsigned int type) { switch (type) { case MXT_GEN_COMMAND_T6: case MXT_GEN_POWER_T7: case MXT_GEN_ACQUIRE_T8: case MXT_GEN_DATASOURCE_T53: case MXT_TOUCH_MULTI_T9: case MXT_TOUCH_KEYARRAY_T15: case MXT_TOUCH_PROXIMITY_T23: case MXT_TOUCH_PROXKEY_T52: case MXT_PROCI_GRIPFACE_T20: case MXT_PROCG_NOISE_T22: case MXT_PROCI_ONETOUCH_T24: case MXT_PROCI_TWOTOUCH_T27: case MXT_PROCI_GRIP_T40: case MXT_PROCI_PALM_T41: case MXT_PROCI_TOUCHSUPPRESSION_T42: case MXT_PROCI_STYLUS_T47: case MXT_PROCG_NOISESUPPRESSION_T48: case MXT_SPT_COMMSCONFIG_T18: case MXT_SPT_GPIOPWM_T19: case MXT_SPT_SELFTEST_T25: case MXT_SPT_CTECONFIG_T28: case MXT_SPT_USERDATA_T38: case MXT_SPT_DIGITIZER_T43: case MXT_SPT_CTECONFIG_T46: case MXT_SPT_DYNAMICCONFIGURATIONCONTAINER_T71: return true; default: return false; } } static void mxt_dump_message(struct mxt_data *data, u8 *message) { dev_dbg(&data->client->dev, "MXT MSG: %*ph\n", data->T5_msg_size, message); } 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) return; data->debug_v2_enabled = true; mutex_unlock(&data->debug_msg_lock); dev_dbg(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; 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_dbg(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); size_t count; size_t bytes_read; if (!data->debug_msg_data) { dev_err(dev, "No buffer!\n"); return 0; } count = bytes / data->T5_msg_size; if (count > DEBUG_MSG_MAX) count = DEBUG_MSG_MAX; mutex_lock(&data->debug_msg_lock); if (count > data->debug_msg_count) count = data->debug_msg_count; bytes_read = count * data->T5_msg_size; memcpy(buf, data->debug_msg_data, bytes_read); data->debug_msg_count = 0; mutex_unlock(&data->debug_msg_lock); return bytes_read; } static int mxt_debug_msg_init(struct mxt_data *data) { sysfs_bin_attr_init(&data->debug_msg_attr); data->debug_msg_attr.attr.name = "debug_msg"; data->debug_msg_attr.attr.mode = 0666; data->debug_msg_attr.read = mxt_debug_msg_read; data->debug_msg_attr.write = mxt_debug_msg_write; data->debug_msg_attr.size = data->T5_msg_size * DEBUG_MSG_MAX; if (sysfs_create_bin_file(&data->client->dev.kobj, &data->debug_msg_attr) < 0) { dev_err(&data->client->dev, "Failed to create %s\n", data->debug_msg_attr.attr.name); return -EINVAL; } return 0; } static void mxt_debug_msg_remove(struct mxt_data *data) { if (data->debug_msg_attr.attr.name) sysfs_remove_bin_file(&data->client->dev.kobj, &data->debug_msg_attr); } static int mxt_wait_for_completion(struct mxt_data *data, struct completion *comp, unsigned int timeout_ms) { struct device *dev = &data->client->dev; unsigned long timeout = msecs_to_jiffies(timeout_ms); long ret; ret = wait_for_completion_interruptible_timeout(comp, timeout); if (ret < 0) { return ret; } 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 = data->info ? data->info->family_id : 0; 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 alt_address) { struct device *dev = &data->client->dev; int error; u8 buf[3]; bool crc_failure, extended_id; error = mxt_lookup_bootloader_address(data, alt_address); if (error) return error; /* Check bootloader status and version information */ error = mxt_bootloader_read(data, buf, sizeof(buf)); if (error) return error; crc_failure = (buf[0] & ~MXT_BOOT_STATUS_MASK) == MXT_APP_CRC_FAIL; extended_id = buf[0] & MXT_BOOT_EXTENDED_ID; dev_info(dev, "Found bootloader addr:%02x ID:%u%s%u%s\n", data->bootloader_addr, extended_id ? (buf[1] & MXT_BOOT_ID_MASK) : buf[0], extended_id ? " version:" : "", extended_id ? buf[2] : 0, crc_failure ? ", APP_CRC_FAIL" : ""); return 0; } static int mxt_send_bootloader_cmd(struct mxt_data *data, bool unlock); static int mxt_write_firmware_frame(struct mxt_data *data, struct mxt_flash *f) { f->frame = (struct mxt_fw_frame *)(f->fw->data + f->pos); /* Take account of CRC bytes */ f->frame_size = __be16_to_cpu(f->frame->size) + 2U; /* Write one frame to device */ return mxt_bootloader_write(data, f->fw->data + f->pos, f->frame_size); } static int mxt_check_bootloader(struct mxt_data *data) { struct device *dev = &data->client->dev; struct mxt_flash *f = data->flash; u8 state; int ret; /* Handle interrupt after download/flash process */ if (f->pos >= f->fw->size) { complete(&f->flash_completion); return 0; } ret = mxt_bootloader_read(data, &state, 1); if (ret) return ret; /* Remove don't care bits */ if (state & ~MXT_BOOT_STATUS_MASK) state &= ~MXT_BOOT_STATUS_MASK; switch (state) { case MXT_WAITING_BOOTLOAD_CMD: dev_info(dev, "Unlocking bootloader\n"); ret = mxt_send_bootloader_cmd(data, true); if (ret) return ret; break; case MXT_WAITING_FRAME_DATA: if ((f->previous != MXT_WAITING_BOOTLOAD_CMD) && (f->previous != MXT_FRAME_CRC_PASS) && (f->previous != MXT_FRAME_CRC_FAIL)) goto unexpected; ret = mxt_write_firmware_frame(data, f); if (ret) return ret; break; case MXT_FRAME_CRC_CHECK: if (f->previous != MXT_WAITING_FRAME_DATA) goto unexpected; break; case MXT_FRAME_CRC_PASS: if (f->previous != MXT_FRAME_CRC_CHECK) goto unexpected; /* Next frame */ f->retry = 0; f->pos += f->frame_size; f->count++; if (f->pos >= f->fw->size) dev_info(dev, "Sent %u frames, %zu bytes\n", f->count, f->fw->size); else if (f->count % 50 == 0) dev_dbg(dev, "Sent %u frames, %lld/%zu bytes\n", f->count, f->pos, f->fw->size); break; case MXT_FRAME_CRC_FAIL: if (f->retry > 20) { dev_err(dev, "Retry count exceeded\n"); return -EIO; } /* Back off by 20ms per retry */ dev_dbg(dev, "Bootloader frame CRC failure\n"); f->retry++; msleep(f->retry * 20); break; default: return -EINVAL; } f->previous = state; /* Poll after 0.1s if no interrupt received */ schedule_delayed_work(&f->work, HZ / 10); return 0; unexpected: dev_err(dev, "Unexpected state transition\n"); return -EINVAL; } 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_read_blks(struct mxt_data *data, u16 start, u16 count, u8 *buf) { u16 offset = 0; int error; u16 size; while (offset < count) { size = min(MXT_MAX_BLOCK_WRITE, count - offset); error = __mxt_read_reg(data->client, start + offset, size, buf + offset); if (error) return error; offset += size; } return 0; } static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len, const void *val) { u8 *buf; size_t count; int ret; bool retry = false; count = len + 2; buf = kmalloc(count, GFP_KERNEL); if (!buf) return -ENOMEM; buf[0] = reg & 0xff; buf[1] = (reg >> 8) & 0xff; memcpy(&buf[2], val, len); retry_write: ret = i2c_master_send(client, buf, count); if (ret != count) { if (!retry) { dev_dbg(&client->dev, "%s: i2c retry\n", __func__); msleep(MXT_WAKEUP_TIME); retry = true; goto retry_write; } else { dev_err(&client->dev, "%s: i2c send failed (%d)\n", __func__, ret); ret = -EIO; } } else { ret = 0; } kfree(buf); return ret; } static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val) { return __mxt_write_reg(client, reg, 1, &val); } static struct mxt_object * mxt_get_object(struct mxt_data *data, u8 type) { struct mxt_object *object; int i; for (i = 0; i < data->info->object_num; i++) { object = data->object_table + i; if (object->type == type) return object; } dev_warn(&data->client->dev, "Invalid object type T%u\n", type); return NULL; } static void mxt_proc_t6_messages(struct mxt_data *data, u8 *msg) { struct device *dev = &data->client->dev; u8 status = msg[1]; u32 crc = msg[2] | (msg[3] << 8) | (msg[4] << 16); if (crc != data->config_crc) { data->config_crc = crc; dev_dbg(dev, "T6 Config Checksum: 0x%06X\n", crc); } complete(&data->crc_completion); /* Detect reset */ if (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 int mxt_write_object(struct mxt_data *data, u8 type, u8 offset, u8 val) { struct mxt_object *object; u16 reg; object = mxt_get_object(data, type); if (!object || offset >= mxt_obj_size(object)) return -EINVAL; reg = object->start_address; return mxt_write_reg(data->client, reg + offset, val); } 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; int i; for (i = 0; i < pdata->t19_num_keys; i++) { if (pdata->t19_keymap[i] == KEY_RESERVED) continue; /* Active-low switch */ input_report_key(input, pdata->t19_keymap[i], !(message[1] & BIT(i))); } } static void mxt_input_sync(struct mxt_data *data) { if (data->input_dev) { input_mt_report_pointer_emulation(data->input_dev, data->pdata->t19_num_keys); input_sync(data->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; 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, 0, 0); mxt_input_sync(data); } /* A size of zero indicates touch is from a linked T47 Stylus */ if (area == 0) { area = MXT_TOUCH_MAJOR_DEFAULT; tool = MT_TOOL_PEN; } else { tool = MT_TOOL_FINGER; } /* if active, pressure must be non-zero */ if (!amplitude) amplitude = MXT_PRESSURE_DEFAULT; /* 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, 0, 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; u8 type = 0; u16 x; u16 y; int distance = 0; int tool = 0; u8 major = 0; u8 pressure = 0; u8 orientation = 0; bool active = false; bool hover = false; id = message[0] - data->T100_reportid_min - 2; /* ignore SCRSTATUS events */ if (id < 0) return; status = message[1]; x = get_unaligned_le16(&message[2]); y = get_unaligned_le16(&message[4]); if (status & MXT_T100_DETECT) { type = (status & MXT_T100_TYPE_MASK) >> 4; switch (type) { case MXT_T100_TYPE_HOVERING_FINGER: tool = MT_TOOL_FINGER; distance = MXT_DISTANCE_HOVERING; hover = true; active = true; break; case MXT_T100_TYPE_FINGER: case MXT_T100_TYPE_GLOVE: tool = MT_TOOL_FINGER; distance = MXT_DISTANCE_ACTIVE_TOUCH; hover = false; active = true; if (data->t100_aux_area) major = message[data->t100_aux_area]; if (data->t100_aux_ampl) pressure = message[data->t100_aux_ampl]; if (data->t100_aux_vect) orientation = message[data->t100_aux_vect]; break; case MXT_T100_TYPE_PASSIVE_STYLUS: tool = MT_TOOL_PEN; distance = MXT_DISTANCE_ACTIVE_TOUCH; hover = false; active = true; /* * Passive stylus is reported with size zero so * hardcode. */ major = MXT_TOUCH_MAJOR_DEFAULT; if (data->t100_aux_ampl) pressure = message[data->t100_aux_ampl]; break; case MXT_T100_TYPE_ACTIVE_STYLUS: /* Report input buttons */ input_report_key(input_dev, BTN_STYLUS, message[6] & MXT_T107_STYLUS_BUTTON0); input_report_key(input_dev, BTN_STYLUS2, message[6] & MXT_T107_STYLUS_BUTTON1); /* stylus in range, but position unavailable */ if (!(message[6] & MXT_T107_STYLUS_HOVER)) break; tool = MT_TOOL_PEN; distance = MXT_DISTANCE_ACTIVE_TOUCH; active = true; major = MXT_TOUCH_MAJOR_DEFAULT; if (!(message[6] & MXT_T107_STYLUS_TIPSWITCH)) { hover = true; distance = MXT_DISTANCE_HOVERING; } else if (data->stylus_aux_pressure) { pressure = message[data->stylus_aux_pressure]; } break; case MXT_T100_TYPE_LARGE_TOUCH: /* Ignore suppressed touch */ break; default: dev_dbg(dev, "Unexpected T100 type\n"); return; } } /* * Values reported should be non-zero if tool is touching the * device */ if (!pressure && !hover) pressure = MXT_PRESSURE_DEFAULT; input_mt_slot(input_dev, id); if (active) { dev_dbg(dev, "[%u] type:%u x:%u y:%u a:%02X p:%02X v:%02X\n", id, type, x, y, major, pressure, orientation); 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_TOUCH_MAJOR, major); input_report_abs(input_dev, ABS_MT_PRESSURE, pressure); input_report_abs(input_dev, ABS_MT_DISTANCE, distance); input_report_abs(input_dev, ABS_MT_ORIENTATION, orientation); } else { dev_dbg(dev, "[%u] release\n", id); /* close out slot */ input_mt_report_slot_state(input_dev, 0, 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]); 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_t92_messages(struct mxt_data *data, u8 *msg) { struct device *dev = &data->client->dev; u8 status = msg[1]; dev_info(dev, "T92 long stroke LSTR=%d %d\n", (status & 0x80) ? 1 : 0, status & 0x0F); } static void mxt_proc_t93_messages(struct mxt_data *data, u8 *msg) { struct device *dev = &data->client->dev; u8 status = msg[1]; dev_info(dev, "T93 report double tap %d\n", status); } 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->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 (!data->input_dev || data->suspended) { /* * Do not report events if input device is not * yet registered or returning from suspend */ mxt_dump_message(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->T15_reportid_min && report_id <= data->T15_reportid_max) { mxt_proc_t15_messages(data, message); } else if (report_id == data->T92_reportid) { mxt_proc_t92_messages(data, message); } else if (report_id == data->T93_reportid) { mxt_proc_t93_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]; /* * This condition may be caused by the CHG line being configured in * Mode 0. It results in unnecessary I2C operations but it is benign. */ if (count == 0) return IRQ_NONE; if (count > data->max_reportid) { dev_warn(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); 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); 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; /* keep reading two msgs until one is invalid or 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->update_input) { mxt_input_sync(data); data->update_input = false; } return IRQ_HANDLED; } static irqreturn_t mxt_interrupt(int irq, void *dev_id) { struct mxt_data *data = dev_id; complete(&data->chg_completion); if (data->in_bootloader) { if (data->flash) cancel_delayed_work_sync(&data->flash->work); return IRQ_RETVAL(data->flash ? mxt_check_bootloader(data) : 0); } if (!data->object_table) return IRQ_HANDLED; 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 device\n"); disable_irq(data->irq); reinit_completion(&data->reset_completion); ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_RESET_VALUE, false); if (ret) return ret; /* Ignore CHG line for 100ms after reset */ msleep(100); enable_irq(data->irq); 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 (irq_get_trigger_type(data->irq) & 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_prepare_cfg_mem(struct mxt_data *data, struct mxt_cfg *cfg) { struct device *dev = &data->client->dev; struct mxt_object *object; unsigned int type, instance, size, byte_offset; int offset; int ret; int i; u16 reg; u8 val; while (cfg->raw_pos < cfg->raw_size) { /* Read type, instance, length */ ret = sscanf(cfg->raw + cfg->raw_pos, "%4x %4x %4x%n", &type, &instance, &size, &offset); if (ret == 0) { /* EOF */ break; } else if (ret != 3) { dev_err(dev, "Bad format: failed to parse object\n"); return -EINVAL; } cfg->raw_pos += offset; object = mxt_get_object(data, type); if (!object) { /* Skip object */ for (i = 0; i < size; i++) { ret = sscanf(cfg->raw + cfg->raw_pos, "%2hhx%n", &val, &offset); if (ret != 1) { dev_err(dev, "Bad format in T%d at %d\n", type, i); return -EINVAL; } cfg->raw_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 %zu 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 %zu 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"); return -EINVAL; } reg = object->start_address + mxt_obj_size(object) * instance; for (i = 0; i < size; i++) { ret = sscanf(cfg->raw + cfg->raw_pos, "%2hhx%n", &val, &offset); if (ret != 1) { dev_err(dev, "Bad format in T%d at %d\n", type, i); return -EINVAL; } cfg->raw_pos += offset; if (i > mxt_obj_size(object)) continue; byte_offset = reg + i - cfg->start_ofs; if (byte_offset < cfg->mem_size) { *(cfg->mem + byte_offset) = val; } else { dev_err(dev, "Bad object: reg:%d, T%d, ofs=%d\n", reg, object->type, byte_offset); return -EINVAL; } } } return 0; } static int mxt_upload_cfg_mem(struct mxt_data *data, struct mxt_cfg *cfg) { unsigned int byte_offset = 0; int error; /* Write configuration as blocks */ while (byte_offset < cfg->mem_size) { unsigned int size = cfg->mem_size - byte_offset; if (size > MXT_MAX_BLOCK_WRITE) size = MXT_MAX_BLOCK_WRITE; error = __mxt_write_reg(data->client, cfg->start_ofs + byte_offset, size, cfg->mem + byte_offset); if (error) { dev_err(&data->client->dev, "Config write error, ret=%d\n", error); return error; } byte_offset += size; } return 0; } static int mxt_init_t7_power_cfg(struct mxt_data *data); /* * mxt_update_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_update_cfg(struct mxt_data *data, const struct firmware *fw) { struct device *dev = &data->client->dev; struct mxt_cfg cfg; int ret; int offset; int i; u32 info_crc, config_crc, calculated_crc; u16 crc_start = 0; /* Make zero terminated copy of the OBP_RAW file */ cfg.raw = kzalloc(fw->size + 1, GFP_KERNEL); if (!cfg.raw) return -ENOMEM; memcpy(cfg.raw, fw->data, fw->size); cfg.raw[fw->size] = '\0'; cfg.raw_size = fw->size; mxt_update_crc(data, MXT_COMMAND_REPORTALL, 1); if (strncmp(cfg.raw, MXT_CFG_MAGIC, strlen(MXT_CFG_MAGIC))) { dev_err(dev, "Unrecognised config file\n"); ret = -EINVAL; goto release_raw; } cfg.raw_pos = strlen(MXT_CFG_MAGIC); /* Load information block and check */ for (i = 0; i < sizeof(struct mxt_info); i++) { ret = sscanf(cfg.raw + cfg.raw_pos, "%2hhx%n", (unsigned char *)&cfg.info + i, &offset); if (ret != 1) { dev_err(dev, "Bad format\n"); ret = -EINVAL; goto release_raw; } cfg.raw_pos += offset; } if (cfg.info.family_id != data->info->family_id) { dev_err(dev, "Family ID mismatch!\n"); ret = -EINVAL; goto release_raw; } if (cfg.info.variant_id != data->info->variant_id) { dev_err(dev, "Variant ID mismatch!\n"); ret = -EINVAL; goto release_raw; } /* Read CRCs */ ret = sscanf(cfg.raw + cfg.raw_pos, "%6x%n", &info_crc, &offset); if (ret != 1) { dev_err(dev, "Bad format: failed to parse Info CRC\n"); ret = -EINVAL; goto release_raw; } cfg.raw_pos += offset; ret = sscanf(cfg.raw + cfg.raw_pos, "%6x%n", &config_crc, &offset); if (ret != 1) { dev_err(dev, "Bad format: failed to parse Config CRC\n"); ret = -EINVAL; goto release_raw; } cfg.raw_pos += offset; /* * The Info Block CRC is calculated over mxt_info and the object * table. If it does not match then we are trying to load the * configuration from a different chip or firmware version, so * the configuration CRC is invalid anyway. */ if (info_crc == data->info_crc) { if (config_crc == 0 || data->config_crc == 0) { dev_info(dev, "CRC zero, attempting to apply config\n"); } else if (config_crc == data->config_crc) { dev_dbg(dev, "Config CRC 0x%06X: OK\n", data->config_crc); return 0; } else { dev_info(dev, "Config CRC 0x%06X: does not match file 0x%06X\n", data->config_crc, config_crc); } } else { dev_warn(dev, "Warning: Info CRC error - device=0x%06X file=0x%06X\n", data->info_crc, info_crc); } /* Malloc memory to store configuration */ cfg.start_ofs = MXT_OBJECT_START + data->info->object_num * sizeof(struct mxt_object) + MXT_INFO_CHECKSUM_SIZE; cfg.mem_size = data->mem_size - cfg.start_ofs; cfg.mem = kzalloc(cfg.mem_size, GFP_KERNEL); if (!cfg.mem) { ret = -ENOMEM; goto release_raw; } ret = mxt_prepare_cfg_mem(data, &cfg); if (ret) goto release_mem; /* Calculate crc of the received configs (not the raw config file) */ if (data->T71_address) crc_start = data->T71_address; else if (data->T7_address) crc_start = data->T7_address; else dev_warn(dev, "Could not find CRC start\n"); if (crc_start > cfg.start_ofs) { calculated_crc = mxt_calculate_crc(cfg.mem, crc_start - cfg.start_ofs, cfg.mem_size); if (config_crc > 0 && config_crc != calculated_crc) dev_warn(dev, "Config CRC in file inconsistent, calculated=%06X, file=%06X\n", calculated_crc, config_crc); } ret = mxt_upload_cfg_mem(data, &cfg); if (ret) goto release_mem; 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 successfully updated\n"); /* T7 config may have changed */ mxt_init_t7_power_cfg(data); release_mem: kfree(cfg.mem); release_raw: kfree(cfg.raw); return ret; } static int mxt_acquire_irq(struct mxt_data *data) { int error; if (!data->irq) { error = request_threaded_irq(data->client->irq, NULL, mxt_interrupt, data->pdata->irqflags | IRQF_ONESHOT, data->client->name, data); if (error) { dev_err(&data->client->dev, "Error requesting irq\n"); return error; } /* Presence of data->irq means IRQ initialised */ data->irq = data->client->irq; } else { enable_irq(data->irq); } if (data->object_table && 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) { data->object_table = NULL; data->info = NULL; kfree(data->raw_info_block); data->raw_info_block = NULL; kfree(data->msg_buf); data->msg_buf = NULL; data->T5_address = 0; data->T5_msg_size = 0; data->T6_reportid = 0; data->T7_address = 0; data->T71_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->T92_reportid = 0; data->T92_address = 0; data->T93_reportid = 0; data->T93_address = 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 mxt_object *object_table) { 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 = 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:%zu Instances:%zu 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 && data->info->version < 0x20) { /* * On mXT224 firmware versions prior to V2.0 * 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; break; 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_SPT_DYNAMICCONFIGURATIONCONTAINER_T71: data->T71_address = object->start_address; break; case MXT_TOUCH_MULTI_T9: data->multitouch = 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_SYMBOLGESTUREPROCESSOR: data->T92_reportid = min_id; data->T92_address = object->start_address; break; case MXT_PROCI_TOUCHSEQUENCELOGGER: data->T93_reportid = min_id; data->T93_address = object->start_address; break; case MXT_TOUCH_MULTITOUCHSCREEN_T100: data->multitouch = 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; case MXT_PROCI_ACTIVESTYLUS_T107: data->T107_address = object->start_address; 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) return -ENOMEM; return 0; } static int mxt_read_info_block(struct mxt_data *data) { struct i2c_client *client = data->client; int error; size_t object_size, size; void *id_buf = NULL, *object_buf = NULL, *buf = NULL; 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); id_buf = kzalloc(size, GFP_KERNEL); if (!id_buf) return -ENOMEM; error = __mxt_read_reg(client, 0, size, id_buf); if (error) goto err_free_mem; /* Read rest of info block */ num_objects = ((struct mxt_info *)id_buf)->object_num; object_size = (num_objects * sizeof(struct mxt_object)) + MXT_INFO_CHECKSUM_SIZE; object_buf = kzalloc(object_size, GFP_KERNEL); if (!object_buf) { error = -ENOMEM; goto err_free_mem; } error = mxt_read_blks(data, MXT_OBJECT_START, object_size, object_buf); if (error) goto err_free_mem; /* Resize buffer to give space for rest of info block */ size += object_size; buf = krealloc(id_buf, size, GFP_KERNEL); if (!buf) { error = -ENOMEM; goto err_free_mem; } id_buf = NULL; /* Copy rest of info block into the buffer */ memcpy(buf + MXT_OBJECT_START, object_buf, object_size); kfree(object_buf); object_buf = NULL; /* 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 (eg i2c-hid) */ 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", calculated_crc, data->info_crc); error = -EIO; goto err_free_mem; } data->raw_info_block = buf; data->info = (struct mxt_info *)buf; dev_info(&client->dev, "Family: %u Variant: %u Firmware V%u.%u.%02X Objects: %u\n", data->info->family_id, data->info->variant_id, data->info->version >> 4, data->info->version & 0xf, data->info->build, data->info->object_num); /* Parse object table information */ error = mxt_parse_object_table(data, buf + MXT_OBJECT_START); if (error) { dev_err(&client->dev, "Error %d parsing object table\n", error); mxt_free_object_table(data); return error; } data->object_table = (struct mxt_object *)(buf + MXT_OBJECT_START); return 0; err_free_mem: kfree(id_buf); kfree(object_buf); kfree(buf); return error; } static void mxt_regulator_enable(struct mxt_data *data) { int error; if (!data->reg_vdd || !data->reg_avdd) return; gpio_set_value(data->pdata->gpio_reset, 0); error = regulator_enable(data->reg_vdd); if (error) return; error = regulator_enable(data->reg_avdd); if (error) return; /* * According to maXTouch power sequencing specification, RESET line * must be kept low until some time after regulators come up to * voltage */ msleep(MXT_REGULATOR_DELAY); gpio_set_value(data->pdata->gpio_reset, 1); msleep(MXT_CHG_DELAY); retry_wait: reinit_completion(&data->chg_completion); data->in_bootloader = true; error = mxt_wait_for_completion(data, &data->chg_completion, MXT_POWERON_DELAY); if (error == -EINTR) goto retry_wait; data->in_bootloader = false; } static void mxt_regulator_disable(struct mxt_data *data) { if (!data->reg_vdd || !data->reg_avdd) return; regulator_disable(data->reg_vdd); regulator_disable(data->reg_avdd); } static int mxt_probe_regulators(struct mxt_data *data) { struct device *dev = &data->client->dev; int error; /* Must have reset GPIO to use regulator support */ if (!gpio_is_valid(data->pdata->gpio_reset)) { error = -EINVAL; goto fail; } data->reg_vdd = regulator_get(dev, "vdd"); if (IS_ERR(data->reg_vdd)) { error = PTR_ERR(data->reg_vdd); dev_err(dev, "Error %d getting vdd regulator\n", error); goto fail; } data->reg_avdd = regulator_get(dev, "avdd"); if (IS_ERR(data->reg_avdd)) { error = PTR_ERR(data->reg_avdd); dev_err(dev, "Error %d getting avdd regulator\n", error); goto fail_release; } mxt_regulator_enable(data); dev_dbg(dev, "Initialised regulators\n"); return 0; fail_release: regulator_put(data->reg_vdd); fail: data->reg_vdd = NULL; data->reg_avdd = NULL; return error; } static int mxt_read_t9_resolution(struct mxt_data *data) { struct i2c_client *client = data->client; int error; struct t9_range range; unsigned char orient; struct mxt_object *object; object = mxt_get_object(data, MXT_TOUCH_MULTI_T9); if (!object) return -EINVAL; error = __mxt_read_reg(client, object->start_address + MXT_T9_RANGE, sizeof(range), &range); if (error) return error; data->max_x = get_unaligned_le16(&range.x); data->max_y = get_unaligned_le16(&range.y); error = __mxt_read_reg(client, object->start_address + MXT_T9_ORIENT, 1, &orient); if (error) return error; data->xy_switch = orient & MXT_T9_ORIENT_SWITCH; return 0; } static int mxt_set_up_active_stylus(struct input_dev *input_dev, struct mxt_data *data) { struct i2c_client *client = data->client; int error; struct mxt_object *object; u8 styaux; int aux; u8 ctrl; object = mxt_get_object(data, MXT_PROCI_ACTIVESTYLUS_T107); if (!object) return 0; error = __mxt_read_reg(client, object->start_address, 1, &ctrl); if (error) return error; /* Check enable bit */ if (!(ctrl & 0x01)) return 0; error = __mxt_read_reg(client, object->start_address + MXT_T107_STYLUS_STYAUX, 1, &styaux); if (error) return error; /* map aux bits */ aux = 7; if (styaux & MXT_T107_STYLUS_STYAUX_PRESSURE) data->stylus_aux_pressure = aux++; if (styaux & MXT_T107_STYLUS_STYAUX_PEAK) data->stylus_aux_peak = aux++; 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); dev_dbg(&client->dev, "T107 active stylus, aux map pressure:%u peak:%u\n", data->stylus_aux_pressure, data->stylus_aux_peak); return 0; } static int mxt_read_t100_config(struct mxt_data *data) { struct i2c_client *client = data->client; int error; struct mxt_object *object; u16 range_x, range_y; u8 cfg, tchaux; u8 aux; object = mxt_get_object(data, MXT_TOUCH_MULTITOUCHSCREEN_T100); if (!object) return -EINVAL; /* read touchscreen dimensions */ error = __mxt_read_reg(client, object->start_address + MXT_T100_XRANGE, sizeof(range_x), &range_x); if (error) return error; data->max_x = get_unaligned_le16(&range_x); error = __mxt_read_reg(client, object->start_address + MXT_T100_YRANGE, sizeof(range_y), &range_y); if (error) return error; data->max_y = get_unaligned_le16(&range_y); /* read orientation config */ error = __mxt_read_reg(client, object->start_address + MXT_T100_CFG1, 1, &cfg); if (error) return error; data->xy_switch = cfg & MXT_T100_CFG_SWITCHXY; /* allocate aux bytes */ error = __mxt_read_reg(client, object->start_address + MXT_T100_TCHAUX, 1, &tchaux); if (error) return error; 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_dbg(&client->dev, "T100 aux mappings vect:%u ampl:%u area:%u\n", data->t100_aux_vect, data->t100_aux_ampl, data->t100_aux_area); return 0; } static int mxt_input_open(struct input_dev *dev); static void mxt_input_close(struct input_dev *dev); static void mxt_set_up_as_touchpad(struct input_dev *input_dev, struct mxt_data *data) { const struct mxt_platform_data *pdata = data->pdata; int i; input_dev->name = "Atmel maXTouch Touchpad"; __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit); input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM); input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM); input_abs_set_res(input_dev, ABS_MT_POSITION_X, MXT_PIXELS_PER_MM); input_abs_set_res(input_dev, ABS_MT_POSITION_Y, MXT_PIXELS_PER_MM); for (i = 0; i < pdata->t19_num_keys; i++) if (pdata->t19_keymap[i] != KEY_RESERVED) input_set_capability(input_dev, EV_KEY, pdata->t19_keymap[i]); } static int mxt_initialize_input_device(struct mxt_data *data) { const struct mxt_platform_data *pdata = data->pdata; struct device *dev = &data->client->dev; struct input_dev *input_dev; int error; unsigned int num_mt_slots; unsigned int mt_flags = 0; int i; switch (data->multitouch) { case MXT_TOUCH_MULTI_T9: num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1; error = mxt_read_t9_resolution(data); if (error) dev_warn(dev, "Failed to initialize T9 resolution\n"); break; case MXT_TOUCH_MULTITOUCHSCREEN_T100: num_mt_slots = data->num_touchids; error = mxt_read_t100_config(data); if (error) dev_warn(dev, "Failed to read T100 config\n"); break; default: dev_err(dev, "Invalid multitouch object\n"); return -EINVAL; } /* Handle default values and orientation switch */ if (data->max_x == 0) data->max_x = 1023; if (data->max_y == 0) data->max_y = 1023; if (data->xy_switch) swap(data->max_x, data->max_y); dev_info(dev, "Touchscreen size X%uY%u\n", data->max_x, data->max_y); /* Register input device */ input_dev = input_allocate_device(); if (!input_dev) return -ENOMEM; if (data->pdata->input_name) input_dev->name = data->pdata->input_name; else input_dev->name = "Atmel maXTouch Touchscreen"; input_dev->phys = data->phys; input_dev->id.bustype = BUS_I2C; input_dev->dev.parent = dev; input_dev->open = mxt_input_open; input_dev->close = mxt_input_close; set_bit(EV_ABS, input_dev->evbit); input_set_capability(input_dev, EV_KEY, BTN_TOUCH); /* For single touch */ input_set_abs_params(input_dev, ABS_X, 0, data->max_x, 0, 0); input_set_abs_params(input_dev, ABS_Y, 0, data->max_y, 0, 0); if (data->multitouch == MXT_TOUCH_MULTI_T9 || (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 && data->t100_aux_ampl)) { input_set_abs_params(input_dev, ABS_PRESSURE, 0, 255, 0, 0); } /* If device has buttons we assume it is a touchpad */ if (pdata->t19_num_keys) { mxt_set_up_as_touchpad(input_dev, data); mt_flags |= INPUT_MT_POINTER; } else { mt_flags |= INPUT_MT_DIRECT; } /* For multi touch */ error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags); if (error) { dev_err(dev, "Error %d initialising slots\n", error); goto err_free_mem; } if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100) { input_set_abs_params(input_dev, ABS_MT_TOOL_TYPE, 0, MT_TOOL_MAX, 0, 0); input_set_abs_params(input_dev, ABS_MT_DISTANCE, MXT_DISTANCE_ACTIVE_TOUCH, MXT_DISTANCE_HOVERING, 0, 0); } input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0, data->max_x, 0, 0); input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0, data->max_y, 0, 0); if (data->multitouch == MXT_TOUCH_MULTI_T9 || (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 && data->t100_aux_area)) { input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0, MXT_MAX_AREA, 0, 0); } if (data->multitouch == MXT_TOUCH_MULTI_T9 || (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 && (data->t100_aux_ampl || data->stylus_aux_pressure))) { input_set_abs_params(input_dev, ABS_MT_PRESSURE, 0, 255, 0, 0); } if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 && data->t100_aux_vect) { input_set_abs_params(input_dev, ABS_MT_ORIENTATION, 0, 255, 0, 0); } if (data->multitouch == MXT_TOUCH_MULTI_T9 || (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 && data->t100_aux_vect)) { input_set_abs_params(input_dev, ABS_MT_ORIENTATION, 0, 255, 0, 0); } /* For T107 Active Stylus */ if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 && data->T107_address) { error = mxt_set_up_active_stylus(input_dev, data); if (error) dev_warn(dev, "Failed to read T107 config\n"); } /* For T15 Key Array */ if (data->T15_reportid_min) { data->t15_keystatus = 0; for (i = 0; i < data->pdata->t15_num_keys; i++) input_set_capability(input_dev, EV_KEY, data->pdata->t15_keymap[i]); } input_set_drvdata(input_dev, data); error = input_register_device(input_dev); if (error) { dev_err(dev, "Error %d registering input device\n", error); goto err_free_mem; } data->input_dev = input_dev; return 0; err_free_mem: input_free_device(input_dev); return error; } static int mxt_sysfs_init(struct mxt_data *data); static void mxt_sysfs_remove(struct mxt_data *data); static int mxt_configure_objects(struct mxt_data *data, const struct firmware *cfg); static void mxt_config_cb(const struct firmware *cfg, void *ctx) { mxt_configure_objects(ctx, cfg); release_firmware(cfg); } static int mxt_initialize(struct mxt_data *data) { struct i2c_client *client = data->client; int recovery_attempts = 0; int error; while (1) { error = mxt_read_info_block(data); if (!error) break; /* Check bootloader state */ error = mxt_probe_bootloader(data, false); if (error) { dev_info(&client->dev, "Trying alternate bootloader address\n"); error = mxt_probe_bootloader(data, true); if (error) { /* Chip is not in appmode or bootloader mode */ return error; } } /* OK, we are in bootloader, see if we can recover */ if (++recovery_attempts > 1) { dev_err(&client->dev, "Could not recover from bootloader mode\n"); /* * We can reflash from this state, so do not * abort initialization. */ data->in_bootloader = true; return 0; } /* Attempt to exit bootloader into app mode */ mxt_send_bootloader_cmd(data, false); msleep(MXT_FW_RESET_TIME); } error = mxt_check_retrigen(data); if (error) goto err_free_object_table; error = mxt_acquire_irq(data); if (error) goto err_free_object_table; error = mxt_sysfs_init(data); if (error) goto err_free_object_table; error = mxt_debug_msg_init(data); if (error) goto err_free_object_table; if (data->cfg_name) { error = request_firmware_nowait(THIS_MODULE, true, data->cfg_name, &data->client->dev, GFP_KERNEL, data, mxt_config_cb); if (error) { dev_err(&client->dev, "Failed to invoke firmware loader: %d\n", error); goto err_free_object_table; } } else { error = mxt_configure_objects(data, NULL); if (error) goto err_free_object_table; } return 0; err_free_object_table: mxt_free_object_table(data); return error; } 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_dbg(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); } } dev_dbg(dev, "Initialized power cfg: ACTV %d, IDLE %d\n", data->t7_cfg.active, data->t7_cfg.idle); return 0; } static int mxt_configure_objects(struct mxt_data *data, const struct firmware *cfg) { struct device *dev = &data->client->dev; int error; error = mxt_init_t7_power_cfg(data); if (error) { dev_err(dev, "Failed to initialize power cfg\n"); goto err_free_object_table; } if (cfg) { error = mxt_update_cfg(data, cfg); if (error) dev_warn(dev, "Error %d updating config\n", error); } if (data->multitouch) { error = mxt_initialize_input_device(data); if (error) goto err_free_object_table; } else { dev_warn(dev, "No touch object detected\n"); } return 0; err_free_object_table: mxt_free_object_table(data); return error; } /* Configuration crc check sum is returned as hex xxxxxx */ static ssize_t mxt_config_crc_show(struct device *dev, struct device_attribute *attr, char *buf) { struct mxt_data *data = dev_get_drvdata(dev); if (!data->initialized) return -EBUSY; return scnprintf(buf, PAGE_SIZE, "%06x\n", data->config_crc); } /* 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); if (!data->initialized) return -EBUSY; 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); if (!data->initialized) return -EBUSY; return scnprintf(buf, PAGE_SIZE, "%u.%u\n", data->info->family_id, data->info->variant_id); } static ssize_t mxt_show_instance(char *buf, int count, struct mxt_object *object, int instance, const u8 *val) { int i; if (mxt_obj_instances(object) > 1) count += scnprintf(buf + count, PAGE_SIZE - count, "Instance %u\n", instance); for (i = 0; i < mxt_obj_size(object); i++) count += scnprintf(buf + count, PAGE_SIZE - count, "\t[%2u]: %02x (%d)\n", i, val[i], val[i]); count += scnprintf(buf + count, PAGE_SIZE - count, "\n"); return count; } static ssize_t mxt_object_show(struct device *dev, struct device_attribute *attr, char *buf) { struct mxt_data *data = dev_get_drvdata(dev); struct mxt_object *object; int count = 0; int i, j; int error; u8 *obuf; if (!data->initialized) return -EBUSY; /* 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_blks(data, 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 -EINVAL; } static int mxt_enter_bootloader(struct mxt_data *data) { int ret; if (data->suspended) { if (data->pdata->suspend_mode == MXT_SUSPEND_REGULATOR) mxt_regulator_enable(data); data->suspended = false; } if (!data->in_bootloader) { disable_irq(data->irq); /* Change to the bootloader mode */ ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_BOOT_VALUE, false); if (ret) return ret; msleep(MXT_RESET_TIME); /* Do not need to scan since we know family ID */ ret = mxt_probe_bootloader(data, 0); if (ret) return ret; data->in_bootloader = true; mxt_debug_msg_remove(data); mxt_sysfs_remove(data); mxt_free_input_device(data); mxt_free_object_table(data); } dev_dbg(&data->client->dev, "Entered bootloader\n"); return 0; } static void mxt_fw_work(struct work_struct *work) { struct mxt_flash *f = container_of(work, struct mxt_flash, work.work); mxt_check_bootloader(f->data); } static int mxt_load_fw(struct device *dev) { struct mxt_data *data = dev_get_drvdata(dev); int ret; data->flash = devm_kzalloc(dev, sizeof(struct mxt_flash), GFP_KERNEL); if (!data->flash) return -ENOMEM; data->flash->data = data; ret = request_firmware(&data->flash->fw, data->fw_name, dev); if (ret) { dev_err(dev, "Unable to open firmware %s\n", data->fw_name); goto free; } /* Check for incorrect enc file */ ret = mxt_check_firmware_format(dev, data->flash->fw); if (ret) goto release_firmware; init_completion(&data->flash->flash_completion); INIT_DELAYED_WORK(&data->flash->work, mxt_fw_work); reinit_completion(&data->flash->flash_completion); if (!data->in_bootloader) { ret = mxt_enter_bootloader(data); if (ret) goto release_firmware; } ret = mxt_acquire_irq(data); if (ret) goto release_firmware; /* Poll after 0.1s if no interrupt received */ schedule_delayed_work(&data->flash->work, HZ / 10); /* Wait for flash. */ ret = mxt_wait_for_completion(data, &data->flash->flash_completion, MXT_BOOTLOADER_WAIT); disable_irq(data->irq); cancel_delayed_work_sync(&data->flash->work); data->in_bootloader = false; release_firmware: release_firmware(data->flash->fw); free: devm_kfree(dev, data->flash); data->flash = NULL; return ret; } static int mxt_update_file_name(struct device *dev, char **file_name, const char *buf, size_t count) { char *file_name_tmp; /* Simple sanity check */ if (count > 64) { dev_warn(dev, "File name too long\n"); return -EINVAL; } file_name_tmp = krealloc(*file_name, count + 1, GFP_KERNEL); if (!file_name_tmp) return -ENOMEM; *file_name = file_name_tmp; memcpy(*file_name, buf, count); /* Echo into the sysfs entry may append newline at the end of buf */ if (buf[count - 1] == '\n') (*file_name)[count - 1] = '\0'; else (*file_name)[count] = '\0'; return 0; } static ssize_t mxt_update_fw_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct mxt_data *data = dev_get_drvdata(dev); int error; if (!data->initialized) return -EBUSY; error = mxt_update_file_name(dev, &data->fw_name, buf, count); if (error) return error; if (data->irq) disable_irq(data->irq); error = mxt_load_fw(dev); if (error) { dev_err(dev, "The firmware update failed(%d)\n", error); count = error; if (data->irq) enable_irq(data->irq); } else { dev_info(dev, "The firmware update succeeded\n"); data->suspended = false; error = mxt_initialize(data); if (error) return error; } return count; } static ssize_t mxt_update_cfg_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct mxt_data *data = dev_get_drvdata(dev); const struct mxt_platform_data *pdata = data->pdata; const struct firmware *cfg; int ret; if (!data->initialized) return -EBUSY; ret = mxt_update_file_name(dev, &data->cfg_name, buf, count); if (ret) return ret; ret = request_firmware(&cfg, data->cfg_name, dev); if (ret < 0) { dev_err(dev, "Failure to request config file %s\n", data->cfg_name); ret = -ENOENT; goto out; } data->updating_config = true; mxt_free_input_device(data); if (data->suspended) { if (pdata->suspend_mode == MXT_SUSPEND_REGULATOR) { enable_irq(data->irq); mxt_regulator_enable(data); } else if (pdata->suspend_mode == MXT_SUSPEND_DEEP_SLEEP) { mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN); ret = mxt_acquire_irq(data); if (ret) goto release; } data->suspended = false; } ret = mxt_configure_objects(data, cfg); if (ret) goto release; ret = count; release: release_firmware(cfg); out: data->updating_config = false; return ret; } static ssize_t mxt_debug_enable_show(struct device *dev, struct device_attribute *attr, char *buf) { struct mxt_data *data = dev_get_drvdata(dev); char c; if (!data->initialized) return -EBUSY; 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) { struct mxt_data *data = dev_get_drvdata(dev); if (!data->initialized) return -EBUSY; return snprintf(buf, 3, "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); u8 i; ssize_t ret; if (!data->initialized) return -EBUSY; if (kstrtou8(buf, 0, &i) == 0 && i < 2) { if (i == 1) mxt_debug_msg_enable(data); else mxt_debug_msg_disable(data); ret = count; } else { dev_dbg(dev, "debug_enabled write error\n"); ret = -EINVAL; } return ret; } 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); u8 i; ssize_t ret; if (!data->initialized) return -EBUSY; if (kstrtou8(buf, 0, &i) == 0 && i < 2) { data->debug_enabled = (i == 1); dev_dbg(dev, "%s\n", i ? "debug enabled" : "debug disabled"); ret = count; } else { dev_dbg(dev, "debug_enabled write error\n"); ret = -EINVAL; } return ret; } 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 : ret; } static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store); static struct attribute *mxt_fw_attrs[] = { &dev_attr_update_fw.attr, NULL }; static const struct attribute_group mxt_fw_attr_group = { .attrs = mxt_fw_attrs, }; static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL); static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL); static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL); static DEVICE_ATTR(update_cfg, S_IWUSR, NULL, mxt_update_cfg_store); static DEVICE_ATTR(config_crc, S_IRUGO, mxt_config_crc_show, NULL); static DEVICE_ATTR(debug_enable, S_IWUSR | S_IRUSR, mxt_debug_enable_show, mxt_debug_enable_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 struct attribute *mxt_attrs[] = { &dev_attr_fw_version.attr, &dev_attr_hw_version.attr, &dev_attr_object.attr, &dev_attr_update_cfg.attr, &dev_attr_config_crc.attr, &dev_attr_debug_enable.attr, &dev_attr_debug_v2_enable.attr, &dev_attr_debug_notify.attr, NULL }; static const struct attribute_group mxt_attr_group = { .attrs = mxt_attrs, }; static int mxt_sysfs_init(struct mxt_data *data) { struct i2c_client *client = data->client; int error; error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group); if (error) { dev_err(&client->dev, "Failure %d creating sysfs group\n", error); return error; } 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; error = sysfs_create_bin_file(&client->dev.kobj, &data->mem_access_attr); if (error) { dev_err(&client->dev, "Failed to create %s\n", data->mem_access_attr.attr.name); goto err_remove_sysfs_group; } return 0; err_remove_sysfs_group: sysfs_remove_group(&client->dev.kobj, &mxt_attr_group); return error; } static void mxt_sysfs_remove(struct mxt_data *data) { struct i2c_client *client = data->client; if (data->mem_access_attr.attr.name) sysfs_remove_bin_file(&client->dev.kobj, &data->mem_access_attr); sysfs_remove_group(&client->dev.kobj, &mxt_attr_group); } static void mxt_reset_slots(struct mxt_data *data) { struct input_dev *input_dev = data->input_dev; int id; if (!input_dev) return; for (id = 0; id < data->num_touchids; id++) { input_mt_slot(input_dev, id); input_mt_report_slot_state(input_dev, 0, 0); } mxt_input_sync(data); } static int mxt_start(struct mxt_data *data) { int ret; if (!data->suspended || data->in_bootloader) return 0; switch (data->pdata->suspend_mode) { case MXT_SUSPEND_T9_CTRL: mxt_soft_reset(data); /* Touch enable */ /* 0x83 = SCANEN | RPTEN | ENABLE */ mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_T9_CTRL, 0x83); break; case MXT_SUSPEND_REGULATOR: enable_irq(data->irq); mxt_regulator_enable(data); break; case MXT_SUSPEND_DEEP_SLEEP: default: /* * Discard any touch messages still in message buffer * from before chip went to sleep */ mxt_process_messages_until_invalid(data); ret = mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN); if (ret) return ret; /* Recalibrate since chip has been in deep sleep */ ret = mxt_t6_command(data, MXT_COMMAND_CALIBRATE, 1, false); if (ret) return ret; ret = mxt_acquire_irq(data); if (ret) return ret; break; } data->suspended = false; return 0; } static int mxt_stop(struct mxt_data *data) { int ret; if (data->suspended || data->in_bootloader || data->updating_config) return 0; switch (data->pdata->suspend_mode) { case MXT_SUSPEND_T9_CTRL: /* Touch disable */ ret = mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_T9_CTRL, 0); if (ret) return ret; break; case MXT_SUSPEND_REGULATOR: disable_irq(data->irq); mxt_regulator_disable(data); mxt_reset_slots(data); break; case MXT_SUSPEND_DEEP_SLEEP: default: disable_irq(data->irq); ret = mxt_set_t7_power_cfg(data, MXT_POWER_CFG_DEEPSLEEP); if (ret) return ret; mxt_reset_slots(data); break; } data->suspended = true; return 0; } static int mxt_input_open(struct input_dev *dev) { struct mxt_data *data = input_get_drvdata(dev); int ret; ret = mxt_start(data); if (ret) dev_err(&data->client->dev, "%s failed rc=%d\n", __func__, ret); return ret; } static void mxt_input_close(struct input_dev *dev) { struct mxt_data *data = input_get_drvdata(dev); int ret; ret = mxt_stop(data); if (ret) dev_err(&data->client->dev, "%s failed rc=%d\n", __func__, ret); } #ifdef CONFIG_OF static const struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client) { struct mxt_platform_data *pdata; struct device_node *np = client->dev.of_node; u32 *keymap; u32 irqflags; int proplen, ret; if (!np) return ERR_PTR(-ENOENT); pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) return ERR_PTR(-ENOMEM); pdata->gpio_reset = of_get_named_gpio_flags(np, "atmel,reset-gpio", 0, NULL); ret = of_property_read_u32(client->dev.of_node, "atmel,irq_flags", &irqflags); if (ret) { dev_warn(&client->dev, "Using default irq_flags"); pdata->irqflags = IRQF_TRIGGER_FALLING; } else pdata->irqflags = irqflags; of_property_read_string(np, "atmel,cfg_name", &pdata->cfg_name); of_property_read_string(np, "atmel,input_name", &pdata->input_name); if (of_find_property(np, "linux,gpio-keymap", &proplen)) { pdata->t19_num_keys = proplen / sizeof(u32); keymap = devm_kzalloc(&client->dev, pdata->t19_num_keys * sizeof(keymap[0]), GFP_KERNEL); if (!keymap) return ERR_PTR(-ENOMEM); ret = of_property_read_u32_array(np, "linux,gpio-keymap", keymap, pdata->t19_num_keys); if (ret) dev_warn(&client->dev, "Couldn't read linux,gpio-keymap: %d\n", ret); pdata->t19_keymap = keymap; } of_property_read_u32(np, "atmel,suspend-mode", &pdata->suspend_mode); return pdata; } #else static const struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client) { return ERR_PTR(-ENOENT); } #endif #ifdef CONFIG_ACPI struct mxt_acpi_platform_data { const char *hid; struct mxt_platform_data pdata; }; static unsigned int samus_touchpad_buttons[] = { KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, BTN_LEFT }; static struct mxt_acpi_platform_data samus_platform_data[] = { { /* Touchpad */ .hid = "ATML0000", .pdata = { .t19_num_keys = ARRAY_SIZE(samus_touchpad_buttons), .t19_keymap = samus_touchpad_buttons, }, }, { /* Touchscreen */ .hid = "ATML0001", }, { } }; static unsigned int chromebook_tp_buttons[] = { KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, BTN_LEFT }; static struct mxt_acpi_platform_data chromebook_platform_data[] = { { /* Touchpad */ .hid = "ATML0000", .pdata = { .t19_num_keys = ARRAY_SIZE(chromebook_tp_buttons), .t19_keymap = chromebook_tp_buttons, }, }, { /* Touchscreen */ .hid = "ATML0001", }, { } }; static const struct dmi_system_id mxt_dmi_table[] = { { /* 2015 Google Pixel */ .ident = "Chromebook Pixel 2", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"), DMI_MATCH(DMI_PRODUCT_NAME, "Samus"), }, .driver_data = samus_platform_data, }, { /* Other Google Chromebooks */ .ident = "Chromebook", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"), }, .driver_data = chromebook_platform_data, }, { } }; static const struct mxt_platform_data *mxt_parse_acpi(struct i2c_client *client) { struct acpi_device *adev; const struct dmi_system_id *system_id; const struct mxt_acpi_platform_data *acpi_pdata; /* * Ignore ACPI devices representing bootloader mode. * * This is a bit of a hack: Google Chromebook BIOS creates ACPI * devices for both application and bootloader modes, but we are * interested in application mode only (if device is in bootloader * mode we'll end up switching into application anyway). So far * application mode addresses were all above 0x40, so we'll use it * as a threshold. */ if (client->addr < 0x40) return ERR_PTR(-ENXIO); adev = ACPI_COMPANION(&client->dev); if (!adev) return ERR_PTR(-ENOENT); system_id = dmi_first_match(mxt_dmi_table); if (!system_id) return ERR_PTR(-ENOENT); acpi_pdata = system_id->driver_data; if (!acpi_pdata) return ERR_PTR(-ENOENT); while (acpi_pdata->hid) { if (!strcmp(acpi_device_hid(adev), acpi_pdata->hid)) return &acpi_pdata->pdata; acpi_pdata++; } return ERR_PTR(-ENOENT); } #else static const struct mxt_platform_data *mxt_parse_acpi(struct i2c_client *client) { return ERR_PTR(-ENOENT); } #endif static struct mxt_platform_data *mxt_default_pdata(struct i2c_client *client) { struct mxt_platform_data *pdata; pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) return ERR_PTR(-ENOMEM); /* Set default parameters */ pdata->irqflags = IRQF_TRIGGER_FALLING; return pdata; } static const struct mxt_platform_data * mxt_get_platform_data(struct i2c_client *client) { const struct mxt_platform_data *pdata; pdata = dev_get_platdata(&client->dev); if (pdata) return pdata; pdata = mxt_parse_dt(client); if (!IS_ERR(pdata) || PTR_ERR(pdata) != -ENOENT) return pdata; pdata = mxt_parse_acpi(client); if (!IS_ERR(pdata) || PTR_ERR(pdata) != -ENOENT) return pdata; pdata = mxt_default_pdata(client); if (!IS_ERR(pdata)) return pdata; dev_err(&client->dev, "No platform data specified\n"); return ERR_PTR(-EINVAL); } static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct mxt_data *data; const struct mxt_platform_data *pdata; int error; pdata = mxt_get_platform_data(client); if (IS_ERR(pdata)) return PTR_ERR(pdata); data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL); if (!data) return -ENOMEM; snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0", client->adapter->nr, client->addr); data->client = client; data->pdata = pdata; i2c_set_clientdata(client, data); if (data->pdata->cfg_name) mxt_update_file_name(&data->client->dev, &data->cfg_name, data->pdata->cfg_name, strlen(data->pdata->cfg_name)); init_completion(&data->chg_completion); init_completion(&data->reset_completion); init_completion(&data->crc_completion); mutex_init(&data->debug_msg_lock); if (pdata->suspend_mode == MXT_SUSPEND_REGULATOR) { error = mxt_acquire_irq(data); if (error) goto err_free_mem; error = mxt_probe_regulators(data); if (error) goto err_free_irq; disable_irq(data->irq); } error = sysfs_create_group(&client->dev.kobj, &mxt_fw_attr_group); if (error) { dev_err(&client->dev, "Failure %d creating fw sysfs group\n", error); return error; } error = mxt_initialize(data); if (error) { mxt_regulator_disable(data); regulator_put(data->reg_avdd); regulator_put(data->reg_vdd); goto err_free_irq; } data->initialized = true; return 0; err_free_irq: if (data->irq) free_irq(data->irq, data); err_free_mem: kfree(data); return error; } static int mxt_remove(struct i2c_client *client) { struct mxt_data *data = i2c_get_clientdata(client); data->initialized = false; sysfs_remove_group(&client->dev.kobj, &mxt_fw_attr_group); mxt_debug_msg_remove(data); mxt_sysfs_remove(data); if (data->irq) free_irq(data->irq, data); regulator_put(data->reg_avdd); regulator_put(data->reg_vdd); mxt_free_input_device(data); mxt_free_object_table(data); kfree(data); return 0; } static int __maybe_unused mxt_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct mxt_data *data = i2c_get_clientdata(client); struct input_dev *input_dev = data->input_dev; if (!input_dev) return 0; mutex_lock(&input_dev->mutex); if (input_dev->users) mxt_stop(data); mutex_unlock(&input_dev->mutex); return 0; } static int __maybe_unused mxt_resume(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct mxt_data *data = i2c_get_clientdata(client); struct input_dev *input_dev = data->input_dev; if (!input_dev) return 0; mutex_lock(&input_dev->mutex); if (input_dev->users) mxt_start(data); mutex_unlock(&input_dev->mutex); return 0; } static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume); static const struct of_device_id mxt_of_match[] = { { .compatible = "atmel,maxtouch", }, {}, }; MODULE_DEVICE_TABLE(of, mxt_of_match); #ifdef CONFIG_ACPI static const struct acpi_device_id mxt_acpi_id[] = { { "ATML0000", 0 }, /* Touchpad */ { "ATML0001", 0 }, /* Touchscreen */ { } }; MODULE_DEVICE_TABLE(acpi, mxt_acpi_id); #endif static const struct i2c_device_id mxt_id[] = { { "qt602240_ts", 0 }, { "atmel_mxt_ts", 0 }, { "atmel_mxt_tp", 0 }, { "maxtouch", 0 }, { "mXT224", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, mxt_id); static struct i2c_driver mxt_driver = { .driver = { .name = "atmel_mxt_ts", .owner = THIS_MODULE, .of_match_table = of_match_ptr(mxt_of_match), .acpi_match_table = ACPI_PTR(mxt_acpi_id), .pm = &mxt_pm_ops, }, .probe = mxt_probe, .remove = mxt_remove, .id_table = mxt_id, }; module_i2c_driver(mxt_driver); /* Module information */ MODULE_AUTHOR("Joonyoung Shim "); MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver"); MODULE_LICENSE("GPL");