/* * Atmel maXTouch Touchscreen driver * * Copyright (C) 2010 Samsung Electronics Co.Ltd * Author: Joonyoung Shim * Copyright (c) 2011-2013, The Linux Foundation. All rights reserved. * * 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 #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 /* Family ID */ #define MXT224_ID 0x80 #define MXT224E_ID 0x81 #define MXT336S_ID 0x82 #define MXT1386_ID 0xA0 #define MXT1664S_ID 0xA2 /* Version */ #define MXT_VER_20 20 #define MXT_VER_21 21 #define MXT_VER_22 22 /* I2C slave address pairs */ struct mxt_address_pair { int bootloader; int application; }; static const struct mxt_address_pair mxt_slave_addresses[] = { { 0x24, 0x4a }, { 0x25, 0x4b }, { 0x25, 0x4b }, { 0x26, 0x4c }, { 0x27, 0x4d }, { 0x34, 0x5a }, { 0x35, 0x5b }, { 0 }, }; enum mxt_device_state { INIT, APPMODE, BOOTLOADER }; /* Firmware */ #define MXT_FW_NAME "maxtouch.fw" /* Firmware frame size including frame data and CRC */ #define MXT_SINGLE_FW_MAX_FRAME_SIZE 278 #define MXT_CHIPSET_FW_MAX_FRAME_SIZE 534 /* Registers */ #define MXT_FAMILY_ID 0x00 #define MXT_VARIANT_ID 0x01 #define MXT_VERSION 0x02 #define MXT_BUILD 0x03 #define MXT_MATRIX_X_SIZE 0x04 #define MXT_MATRIX_Y_SIZE 0x05 #define MXT_OBJECT_NUM 0x06 #define MXT_OBJECT_START 0x07 #define MXT_OBJECT_SIZE 6 /* 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_PROCG_NOISE_T62 62 #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_PROCI_ADAPTIVETHRESHOLD_T55 55 #define MXT_PROCI_SHIELDLESS_T56 56 #define MXT_PROCI_EXTRATSDATA_T57 57 #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_EXTRANOISESUPCTRLS_T58 58 #define MXT_SPT_TIMER_T61 61 /* 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 /* MXT_GEN_POWER_T7 field */ #define MXT_POWER_IDLEACQINT 0 #define MXT_POWER_ACTVACQINT 1 #define MXT_POWER_ACTV2IDLETO 2 /* MXT_GEN_ACQUIRE_T8 field */ #define MXT_ACQUIRE_CHRGTIME 0 #define MXT_ACQUIRE_TCHDRIFT 2 #define MXT_ACQUIRE_DRIFTST 3 #define MXT_ACQUIRE_TCHAUTOCAL 4 #define MXT_ACQUIRE_SYNC 5 #define MXT_ACQUIRE_ATCHCALST 6 #define MXT_ACQUIRE_ATCHCALSTHR 7 /* MXT_TOUCH_MULT_T9 field */ #define MXT_TOUCH_CTRL 0 #define MXT_TOUCH_XORIGIN 1 #define MXT_TOUCH_YORIGIN 2 #define MXT_TOUCH_XSIZE 3 #define MXT_TOUCH_YSIZE 4 #define MXT_TOUCH_BLEN 6 #define MXT_TOUCH_TCHTHR 7 #define MXT_TOUCH_TCHDI 8 #define MXT_TOUCH_ORIENT 9 #define MXT_TOUCH_MOVHYSTI 11 #define MXT_TOUCH_MOVHYSTN 12 #define MXT_TOUCH_NUMTOUCH 14 #define MXT_TOUCH_MRGHYST 15 #define MXT_TOUCH_MRGTHR 16 #define MXT_TOUCH_AMPHYST 17 #define MXT_TOUCH_XRANGE_LSB 18 #define MXT_TOUCH_XRANGE_MSB 19 #define MXT_TOUCH_YRANGE_LSB 20 #define MXT_TOUCH_YRANGE_MSB 21 #define MXT_TOUCH_XLOCLIP 22 #define MXT_TOUCH_XHICLIP 23 #define MXT_TOUCH_YLOCLIP 24 #define MXT_TOUCH_YHICLIP 25 #define MXT_TOUCH_XEDGECTRL 26 #define MXT_TOUCH_XEDGEDIST 27 #define MXT_TOUCH_YEDGECTRL 28 #define MXT_TOUCH_YEDGEDIST 29 #define MXT_TOUCH_JUMPLIMIT 30 /* MXT_PROCI_GRIPFACE_T20 field */ #define MXT_GRIPFACE_CTRL 0 #define MXT_GRIPFACE_XLOGRIP 1 #define MXT_GRIPFACE_XHIGRIP 2 #define MXT_GRIPFACE_YLOGRIP 3 #define MXT_GRIPFACE_YHIGRIP 4 #define MXT_GRIPFACE_MAXTCHS 5 #define MXT_GRIPFACE_SZTHR1 7 #define MXT_GRIPFACE_SZTHR2 8 #define MXT_GRIPFACE_SHPTHR1 9 #define MXT_GRIPFACE_SHPTHR2 10 #define MXT_GRIPFACE_SUPEXTTO 11 /* MXT_PROCI_NOISE field */ #define MXT_NOISE_CTRL 0 #define MXT_NOISE_OUTFLEN 1 #define MXT_NOISE_GCAFUL_LSB 3 #define MXT_NOISE_GCAFUL_MSB 4 #define MXT_NOISE_GCAFLL_LSB 5 #define MXT_NOISE_GCAFLL_MSB 6 #define MXT_NOISE_ACTVGCAFVALID 7 #define MXT_NOISE_NOISETHR 8 #define MXT_NOISE_FREQHOPSCALE 10 #define MXT_NOISE_FREQ0 11 #define MXT_NOISE_FREQ1 12 #define MXT_NOISE_FREQ2 13 #define MXT_NOISE_FREQ3 14 #define MXT_NOISE_FREQ4 15 #define MXT_NOISE_IDLEGCAFVALID 16 /* MXT_SPT_COMMSCONFIG_T18 */ #define MXT_COMMS_CTRL 0 #define MXT_COMMS_CMD 1 /* MXT_SPT_CTECONFIG_T28 field */ #define MXT_CTE_CTRL 0 #define MXT_CTE_CMD 1 #define MXT_CTE_MODE 2 #define MXT_CTE_IDLEGCAFDEPTH 3 #define MXT_CTE_ACTVGCAFDEPTH 4 #define MXT_CTE_VOLTAGE 5 #define MXT_VOLTAGE_DEFAULT 2700000 #define MXT_VOLTAGE_STEP 10000 /* Analog voltage @2.7 V */ #define MXT_VTG_MIN_UV 2700000 #define MXT_VTG_MAX_UV 3300000 #define MXT_ACTIVE_LOAD_UA 15000 #define MXT_LPM_LOAD_UA 10 /* Digital voltage @1.8 V */ #define MXT_VTG_DIG_MIN_UV 1800000 #define MXT_VTG_DIG_MAX_UV 1800000 #define MXT_ACTIVE_LOAD_DIG_UA 10000 #define MXT_LPM_LOAD_DIG_UA 10 #define MXT_I2C_VTG_MIN_UV 1800000 #define MXT_I2C_VTG_MAX_UV 1800000 #define MXT_I2C_LOAD_UA 10000 #define MXT_I2C_LPM_LOAD_UA 10 /* Define for MXT_GEN_COMMAND_T6 */ #define MXT_BOOT_VALUE 0xa5 #define MXT_BACKUP_VALUE 0x55 #define MXT_BACKUP_TIME 25 /* msec */ /* Software reset delay */ #define MXT224_RESET_TIME 64 /* msec */ #define MXT224E_RESET_TIME 21 /* msec */ #define MXT336S_RESET_TIME 25 /* msec */ #define MXT1386_RESET_TIME 250 /* msec */ #define MXT1386E_RESET_TIME 229 /* msec */ #define MXT1664S_RESET_TIME 280 /* msec */ #define MXT_RESET_TIME 250 /* msec */ #define MXT_RESET_NOCHGREAD 400 /* msec */ /* Power on delay */ #define MXT224_POWER_ON_TIME 40 /* msec */ #define MXT224E_POWER_ON_TIME 21 /* msec */ #define MXT336S_POWER_ON_TIME 25 /* msec */ #define MXT1386_POWER_ON_TIME 90 /* msec */ #define MXT1386E_POWER_ON_TIME 81 /* msec */ #define MXT1664S_POWER_ON_TIME 65 /* msec */ #define MXT_POWER_ON_TIME 100 /* msec */ #define MXT_FWRESET_TIME 1000 /* msec */ #define MXT_WAKE_TIME 25 /* 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 /* Touch status */ #define MXT_SUPPRESS (1 << 1) #define MXT_AMP (1 << 2) #define MXT_VECTOR (1 << 3) #define MXT_MOVE (1 << 4) #define MXT_RELEASE (1 << 5) #define MXT_PRESS (1 << 6) #define MXT_DETECT (1 << 7) /* Touch orient bits */ #define MXT_XY_SWITCH (1 << 0) #define MXT_X_INVERT (1 << 1) #define MXT_Y_INVERT (1 << 2) /* Touch suppression */ #define MXT_TCHSUP_ACTIVE (1 << 0) /* Touchscreen absolute values */ #define MXT_MAX_AREA 0xff #define MXT_MAX_FINGER 10 #define T7_DATA_SIZE 3 #define MXT_MAX_RW_TRIES 3 #define MXT_BLOCK_SIZE 256 #define MXT_CFG_VERSION_LEN 3 #define MXT_CFG_VERSION_EQUAL 0 #define MXT_CFG_VERSION_LESS 1 #define MXT_CFG_VERSION_GREATER 2 #define MXT_COORDS_ARR_SIZE 4 #define MXT_DEBUGFS_DIR "atmel_mxt_ts" #define MXT_DEBUGFS_FILE "object" 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; u8 instances; u8 num_report_ids; /* to map object and message */ u8 max_reportid; }; struct mxt_message { u8 reportid; u8 message[7]; u8 checksum; }; struct mxt_finger { int status; int x; int y; int area; int pressure; }; /* Each client has this additional data */ struct mxt_data { struct i2c_client *client; struct input_dev *input_dev; const struct mxt_platform_data *pdata; const struct mxt_config_info *config_info; enum mxt_device_state state; struct mxt_object *object_table; struct mxt_info info; struct mxt_finger finger[MXT_MAX_FINGER]; unsigned int irq; struct regulator *vcc_ana; struct regulator *vcc_dig; struct regulator *vcc_i2c; struct mxt_address_pair addr_pair; #if defined(CONFIG_FB) struct notifier_block fb_notif; #elif defined(CONFIG_HAS_EARLYSUSPEND) struct early_suspend early_suspend; #endif u8 t7_data[T7_DATA_SIZE]; u16 t7_start_addr; u32 keyarray_old; u32 keyarray_new; u8 t9_max_reportid; u8 t9_min_reportid; u8 t15_max_reportid; u8 t15_min_reportid; u8 t42_max_reportid; u8 t42_min_reportid; u8 cfg_version[MXT_CFG_VERSION_LEN]; int cfg_version_idx; int t38_start_addr; bool update_cfg; const char *fw_name; bool no_force_update; #if defined(CONFIG_SECURE_TOUCH) atomic_t st_enabled; atomic_t st_pending_irqs; struct completion st_completion; struct completion st_powerdown; #endif }; static struct dentry *debug_base; static bool mxt_object_readable(unsigned int type) { switch (type) { case MXT_GEN_MESSAGE_T5: 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_PROCG_NOISE_T62: 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_PROCI_SHIELDLESS_T56: case MXT_PROCI_EXTRATSDATA_T57: 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_EXTRANOISESUPCTRLS_T58: case MXT_SPT_TIMER_T61: case MXT_PROCI_ADAPTIVETHRESHOLD_T55: return true; default: return false; } } static bool mxt_object_writable(unsigned int type) { switch (type) { case MXT_GEN_COMMAND_T6: case MXT_GEN_POWER_T7: case MXT_GEN_ACQUIRE_T8: 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_PROCG_NOISE_T62: 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_PROCI_SHIELDLESS_T56: case MXT_PROCI_EXTRATSDATA_T57: 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_EXTRANOISESUPCTRLS_T58: case MXT_SPT_TIMER_T61: case MXT_PROCI_ADAPTIVETHRESHOLD_T55: return true; default: return false; } } static void mxt_dump_message(struct device *dev, struct mxt_message *message) { dev_dbg(dev, "reportid:\t0x%x\n", message->reportid); dev_dbg(dev, "message1:\t0x%x\n", message->message[0]); dev_dbg(dev, "message2:\t0x%x\n", message->message[1]); dev_dbg(dev, "message3:\t0x%x\n", message->message[2]); dev_dbg(dev, "message4:\t0x%x\n", message->message[3]); dev_dbg(dev, "message5:\t0x%x\n", message->message[4]); dev_dbg(dev, "message6:\t0x%x\n", message->message[5]); dev_dbg(dev, "message7:\t0x%x\n", message->message[6]); dev_dbg(dev, "checksum:\t0x%x\n", message->checksum); } static int mxt_lookup_bootloader_address(struct mxt_data *data) { int i; for (i = 0; mxt_slave_addresses[i].application != 0; i++) { if (mxt_slave_addresses[i].application == data->client->addr) { data->addr_pair.bootloader = mxt_slave_addresses[i].bootloader; return 0; } } dev_err(&data->client->dev, "Address 0x%02x not found in address table", data->client->addr); return -EINVAL; }; static int mxt_switch_to_bootloader_address(struct mxt_data *data) { struct i2c_client *client = data->client; if (data->state == BOOTLOADER) { dev_err(&client->dev, "Already in BOOTLOADER state\n"); return -EINVAL; } dev_info(&client->dev, "Changing to bootloader address: 0x%02x -> 0x%02x", client->addr, data->addr_pair.bootloader); client->addr = data->addr_pair.bootloader; data->state = BOOTLOADER; return 0; } static int mxt_switch_to_appmode_address(struct mxt_data *data) { struct i2c_client *client = data->client; if (data->state == APPMODE) { dev_err(&client->dev, "Already in APPMODE state\n"); return -EINVAL; } dev_info(&client->dev, "Changing to application mode address: " \ "0x%02x -> 0x%02x", client->addr, data->addr_pair.application); client->addr = data->addr_pair.application; data->state = APPMODE; return 0; } static int mxt_get_bootloader_version(struct i2c_client *client, u8 val) { u8 buf[3]; if (val | MXT_BOOT_EXTENDED_ID) { dev_dbg(&client->dev, "Retrieving extended mode ID information"); if (i2c_master_recv(client, &buf[0], 3) != 3) { dev_err(&client->dev, "%s: i2c recv failed\n", __func__); return -EIO; } dev_info(&client->dev, "Bootloader ID:%d Version:%d", buf[1], buf[2]); return buf[0]; } else { dev_info(&client->dev, "Bootloader ID:%d", val & MXT_BOOT_ID_MASK); return val; } } static int mxt_get_bootloader_id(struct i2c_client *client) { u8 val; u8 buf[3]; if (i2c_master_recv(client, &val, 1) != 1) { dev_err(&client->dev, "%s: i2c recv failed\n", __func__); return -EIO; } if (val | MXT_BOOT_EXTENDED_ID) { if (i2c_master_recv(client, &buf[0], 3) != 3) { dev_err(&client->dev, "%s: i2c recv failed\n", __func__); return -EIO; } return buf[1]; } else { dev_info(&client->dev, "Bootloader ID:%d", val & MXT_BOOT_ID_MASK); return val & MXT_BOOT_ID_MASK; } } static int mxt_check_bootloader(struct i2c_client *client, unsigned int state) { u8 val; recheck: if (i2c_master_recv(client, &val, 1) != 1) { dev_err(&client->dev, "%s: i2c recv failed\n", __func__); return -EIO; } switch (state) { case MXT_WAITING_BOOTLOAD_CMD: val = mxt_get_bootloader_version(client, val); val &= ~MXT_BOOT_STATUS_MASK; break; 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; if (val == MXT_FRAME_CRC_FAIL) { dev_err(&client->dev, "Bootloader CRC fail\n"); return -EINVAL; } break; default: return -EINVAL; } if (val != state) { dev_err(&client->dev, "Invalid bootloader mode state %X\n", val); return -EINVAL; } return 0; } static int mxt_unlock_bootloader(struct i2c_client *client) { u8 buf[2]; buf[0] = MXT_UNLOCK_CMD_LSB; buf[1] = MXT_UNLOCK_CMD_MSB; if (i2c_master_send(client, buf, 2) != 2) { dev_err(&client->dev, "%s: i2c send failed\n", __func__); return -EIO; } return 0; } static int mxt_fw_write(struct i2c_client *client, const u8 *data, unsigned int frame_size) { if (i2c_master_send(client, data, frame_size) != frame_size) { dev_err(&client->dev, "%s: i2c send failed\n", __func__); return -EIO; } 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 i = 0; 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; do { if (i2c_transfer(client->adapter, xfer, 2) == 2) return 0; msleep(MXT_WAKE_TIME); } while (++i < MXT_MAX_RW_TRIES); dev_err(&client->dev, "%s: i2c transfer failed\n", __func__); return -EIO; } static int mxt_read_reg(struct i2c_client *client, u16 reg, u8 *val) { return __mxt_read_reg(client, reg, 1, val); } static int __mxt_write_reg(struct i2c_client *client, u16 addr, u16 length, u8 *value) { u8 buf[MXT_BLOCK_SIZE + 2]; int i, tries = 0; if (length > MXT_BLOCK_SIZE) return -EINVAL; buf[0] = addr & 0xff; buf[1] = (addr >> 8) & 0xff; for (i = 0; i < length; i++) buf[i + 2] = *value++; do { if (i2c_master_send(client, buf, length + 2) == (length + 2)) return 0; msleep(MXT_WAKE_TIME); } while (++tries < MXT_MAX_RW_TRIES); dev_err(&client->dev, "%s: i2c send failed\n", __func__); return -EIO; } static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val) { return __mxt_write_reg(client, reg, 1, &val); } static int mxt_read_object_table(struct i2c_client *client, u16 reg, u8 *object_buf) { return __mxt_read_reg(client, reg, MXT_OBJECT_SIZE, object_buf); } 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_err(&data->client->dev, "Invalid object type\n"); return NULL; } static int mxt_read_message(struct mxt_data *data, struct mxt_message *message) { struct mxt_object *object; u16 reg; object = mxt_get_object(data, MXT_GEN_MESSAGE_T5); if (!object) return -EINVAL; reg = object->start_address; return __mxt_read_reg(data->client, reg, sizeof(struct mxt_message), message); } static int mxt_read_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) return -EINVAL; reg = object->start_address; return __mxt_read_reg(data->client, reg + offset, 1, val); } static int mxt_get_object_address(struct device *dev, u8 type) { struct mxt_data *data = dev_get_drvdata(dev); u8 obj_num, obj_buf[MXT_OBJECT_SIZE]; u16 reg; int i, error; error = mxt_read_reg(data->client, MXT_OBJECT_NUM, &obj_num); if (error) { dev_err(dev, "reading number of objects failed\n"); return -EINVAL; } for (i = 0; i < obj_num; i++) { reg = MXT_OBJECT_START + MXT_OBJECT_SIZE * i; error = mxt_read_object_table(data->client, reg, obj_buf); if (error) return error; if (obj_buf[0] == type) return obj_buf[2] << 8 | obj_buf[1]; } /* If control reaches here, i = obj_num and object not found */ dev_err(dev, "Requested object %d not found.\n", type); return -EINVAL; } 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) return -EINVAL; reg = object->start_address; return mxt_write_reg(data->client, reg + offset, val); } static void mxt_input_report(struct mxt_data *data, int single_id) { struct mxt_finger *finger = data->finger; struct input_dev *input_dev = data->input_dev; int status = finger[single_id].status; int finger_num = 0; int id; for (id = 0; id < MXT_MAX_FINGER; id++) { if (!finger[id].status) continue; input_mt_slot(input_dev, id); /* Firmware reports min/max values when the touch is * outside screen area. Send a release event in * such cases to avoid unwanted touches. */ if (finger[id].x <= data->pdata->panel_minx || finger[id].x >= data->pdata->panel_maxx || finger[id].y <= data->pdata->panel_miny || finger[id].y >= data->pdata->panel_maxy) { finger[id].status = MXT_RELEASE; } input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, finger[id].status != MXT_RELEASE); if (finger[id].status != MXT_RELEASE) { finger_num++; input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, finger[id].area); input_report_abs(input_dev, ABS_MT_POSITION_X, finger[id].x); input_report_abs(input_dev, ABS_MT_POSITION_Y, finger[id].y); input_report_abs(input_dev, ABS_MT_PRESSURE, finger[id].pressure); } else { finger[id].status = 0; } } input_report_key(input_dev, BTN_TOUCH, finger_num > 0); if (finger[single_id].x <= data->pdata->panel_minx || finger[single_id].x >= data->pdata->panel_maxx || finger[single_id].y <= data->pdata->panel_miny || finger[single_id].y >= data->pdata->panel_maxy) { status = MXT_RELEASE; } if (status != MXT_RELEASE) { input_report_abs(input_dev, ABS_X, finger[single_id].x); input_report_abs(input_dev, ABS_Y, finger[single_id].y); input_report_abs(input_dev, ABS_PRESSURE, finger[single_id].pressure); } input_sync(input_dev); } static void mxt_release_all(struct mxt_data *data) { int id; for (id = 0; id < MXT_MAX_FINGER; id++) if (data->finger[id].status) data->finger[id].status = MXT_RELEASE; mxt_input_report(data, 0); } static void mxt_input_touchevent(struct mxt_data *data, struct mxt_message *message, int id) { struct mxt_finger *finger = data->finger; struct device *dev = &data->client->dev; u8 status = message->message[0]; int x; int y; int area; int pressure; if (status & MXT_SUPPRESS) { mxt_release_all(data); return; } /* Check the touch is present on the screen */ if (!(status & MXT_DETECT)) { if (status & MXT_RELEASE) { dev_dbg(dev, "[%d] released\n", id); finger[id].status = MXT_RELEASE; mxt_input_report(data, id); } return; } /* Check only AMP detection */ if (!(status & (MXT_PRESS | MXT_MOVE))) return; x = (message->message[1] << 4) | ((message->message[3] >> 4) & 0xf); y = (message->message[2] << 4) | ((message->message[3] & 0xf)); if (data->pdata->panel_maxx < 1024) x = x >> 2; if (data->pdata->panel_maxy < 1024) y = y >> 2; area = message->message[4]; pressure = message->message[5]; dev_dbg(dev, "[%d] %s x: %d, y: %d, area: %d\n", id, status & MXT_MOVE ? "moved" : "pressed", x, y, area); finger[id].status = status & MXT_MOVE ? MXT_MOVE : MXT_PRESS; finger[id].x = x; finger[id].y = y; finger[id].area = area; finger[id].pressure = pressure; mxt_input_report(data, id); } static void mxt_handle_key_array(struct mxt_data *data, struct mxt_message *message) { u32 keys_changed; int i; if (!data->pdata->key_codes) { dev_err(&data->client->dev, "keyarray is not supported\n"); return; } data->keyarray_new = message->message[1] | (message->message[2] << 8) | (message->message[3] << 16) | (message->message[4] << 24); keys_changed = data->keyarray_old ^ data->keyarray_new; if (!keys_changed) { dev_dbg(&data->client->dev, "no keys changed\n"); return; } for (i = 0; i < MXT_KEYARRAY_MAX_KEYS; i++) { if (!(keys_changed & (1 << i))) continue; input_report_key(data->input_dev, data->pdata->key_codes[i], (data->keyarray_new & (1 << i))); input_sync(data->input_dev); } data->keyarray_old = data->keyarray_new; } static void mxt_handle_touch_suppression(struct mxt_data *data, u8 status) { dev_dbg(&data->client->dev, "touch suppression\n"); /* release all touches */ if (status & MXT_TCHSUP_ACTIVE) mxt_release_all(data); } #if defined(CONFIG_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) complete(&data->st_completion); 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; struct mxt_message message; struct device *dev = &data->client->dev; int id; u8 reportid; if (data->state != APPMODE) { dev_err(dev, "Ignoring IRQ - not in APPMODE state\n"); return IRQ_HANDLED; } if (IRQ_HANDLED == mxt_filter_interrupt(data)) goto end; do { if (mxt_read_message(data, &message)) { dev_err(dev, "Failed to read message\n"); goto end; } reportid = message.reportid; if (!reportid) { dev_dbg(dev, "Report id 0 is reserved\n"); continue; } id = reportid - data->t9_min_reportid; /* check whether report id is part of T9, T15 or T42 */ if (reportid >= data->t9_min_reportid && reportid <= data->t9_max_reportid) mxt_input_touchevent(data, &message, id); else if (reportid >= data->t15_min_reportid && reportid <= data->t15_max_reportid) mxt_handle_key_array(data, &message); else if (reportid >= data->t42_min_reportid && reportid <= data->t42_max_reportid) mxt_handle_touch_suppression(data, message.message[0]); else mxt_dump_message(dev, &message); } while (reportid != 0xff); end: return IRQ_HANDLED; } static int mxt_check_reg_init(struct mxt_data *data) { const struct mxt_config_info *config_info = data->config_info; struct mxt_object *object; struct device *dev = &data->client->dev; int index = 0; int i, j, config_offset; if (!config_info) { dev_dbg(dev, "No cfg data defined, skipping reg init\n"); return 0; } for (i = 0; i < data->info.object_num; i++) { object = data->object_table + i; if (!mxt_object_writable(object->type)) continue; for (j = 0; j < object->size + 1; j++) { config_offset = index + j; if (config_offset > config_info->config_length) { dev_err(dev, "Not enough config data!\n"); return -EINVAL; } mxt_write_object(data, object->type, j, config_info->config[config_offset]); } index += object->size + 1; } return 0; } static int mxt_make_highchg(struct mxt_data *data) { struct device *dev = &data->client->dev; struct mxt_message message; int count = 10; int error; /* Read dummy message to make high CHG pin */ do { error = mxt_read_message(data, &message); if (error) return error; } while (message.reportid != 0xff && --count); if (!count) { dev_err(dev, "CHG pin isn't cleared\n"); return -EBUSY; } return 0; } static int mxt_get_info(struct mxt_data *data) { struct i2c_client *client = data->client; struct mxt_info *info = &data->info; int error; u8 val; error = mxt_read_reg(client, MXT_FAMILY_ID, &val); if (error) return error; info->family_id = val; error = mxt_read_reg(client, MXT_VARIANT_ID, &val); if (error) return error; info->variant_id = val; error = mxt_read_reg(client, MXT_VERSION, &val); if (error) return error; info->version = val; error = mxt_read_reg(client, MXT_BUILD, &val); if (error) return error; info->build = val; error = mxt_read_reg(client, MXT_OBJECT_NUM, &val); if (error) return error; info->object_num = val; return 0; } static int mxt_get_object_table(struct mxt_data *data) { int error; int i; u16 reg; u8 reportid = 0; u8 buf[MXT_OBJECT_SIZE]; bool found_t38 = false; for (i = 0; i < data->info.object_num; i++) { struct mxt_object *object = data->object_table + i; reg = MXT_OBJECT_START + MXT_OBJECT_SIZE * i; error = mxt_read_object_table(data->client, reg, buf); if (error) return error; object->type = buf[0]; object->start_address = (buf[2] << 8) | buf[1]; object->size = buf[3]; object->instances = buf[4]; object->num_report_ids = buf[5]; if (object->num_report_ids) { reportid += object->num_report_ids * (object->instances + 1); object->max_reportid = reportid; } /* Calculate index for config major version in config array. * Major version is the first byte in object T38. */ if (object->type == MXT_SPT_USERDATA_T38) { data->t38_start_addr = object->start_address; found_t38 = true; } if (!found_t38 && mxt_object_writable(object->type)) data->cfg_version_idx += object->size + 1; } return 0; } static int compare_versions(const u8 *v1, const u8 *v2) { int i; if (!v1 || !v2) return -EINVAL; /* The major version number stays the same across different versions for * a particular controller on a target. The minor and sub-minor version * numbers indicate which version is newer. */ if (v1[0] != v2[0]) return -EINVAL; for (i = 1; i < MXT_CFG_VERSION_LEN; i++) { if (v1[i] > v2[i]) return MXT_CFG_VERSION_LESS; /* v2 is older */ if (v1[i] < v2[i]) return MXT_CFG_VERSION_GREATER; /* v2 is newer */ } return MXT_CFG_VERSION_EQUAL; /* v1 and v2 are equal */ } static void mxt_check_config_version(struct mxt_data *data, const struct mxt_config_info *cfg_info, bool match_major, const u8 **cfg_version_found, bool *found_cfg_major_match) { const u8 *cfg_version; int result = -EINVAL; cfg_version = cfg_info->config + data->cfg_version_idx; if (*cfg_version_found) result = compare_versions(*cfg_version_found, cfg_version); if (match_major) { if (result >= MXT_CFG_VERSION_EQUAL) *found_cfg_major_match = true; if (result == MXT_CFG_VERSION_EQUAL || result == MXT_CFG_VERSION_GREATER) { data->config_info = cfg_info; data->fw_name = cfg_info->fw_name; *cfg_version_found = cfg_version; } if (result == MXT_CFG_VERSION_GREATER) data->update_cfg = true; } else if (!*cfg_version_found || result == MXT_CFG_VERSION_GREATER) { data->config_info = cfg_info; data->fw_name = cfg_info->fw_name; data->update_cfg = true; *cfg_version_found = cfg_version; } } /* If the controller's config version has a non-zero major number, call this * function with match_major = true to look for the latest config present in * the pdata based on matching family id, variant id, f/w version, build, and * config major number. If the controller is programmed with wrong config data * previously, call this function with match_major = false to look for latest * config based on based on matching family id, variant id, f/w version and * build only. */ static int mxt_search_config_array(struct mxt_data *data, bool match_major) { const struct mxt_platform_data *pdata = data->pdata; const struct mxt_config_info *cfg_info; const struct mxt_info *info = &data->info; const u8 *cfg_version_found; bool found_cfg_major_match = false; int i; cfg_version_found = match_major ? data->cfg_version : NULL; for (i = 0; i < pdata->config_array_size; i++) { cfg_info = &pdata->config_array[i]; if (!cfg_info->config || !cfg_info->config_length) continue; if (info->family_id == cfg_info->family_id && info->variant_id == cfg_info->variant_id && info->version == cfg_info->version && info->build == cfg_info->build) { mxt_check_config_version(data, cfg_info, match_major, &cfg_version_found, &found_cfg_major_match); } } if (data->config_info || found_cfg_major_match) return 0; data->config_info = NULL; data->fw_name = NULL; return -EINVAL; } static int mxt_get_config(struct mxt_data *data) { const struct mxt_platform_data *pdata = data->pdata; struct device *dev = &data->client->dev; struct mxt_object *object; int error; if (!pdata->config_array || !pdata->config_array_size) { dev_dbg(dev, "No cfg data provided by platform data\n"); return 0; } /* Get current config version */ object = mxt_get_object(data, MXT_SPT_USERDATA_T38); if (!object) { dev_err(dev, "Unable to obtain USERDATA object\n"); return -EINVAL; } error = __mxt_read_reg(data->client, object->start_address, sizeof(data->cfg_version), data->cfg_version); if (error) { dev_err(dev, "Unable to read config version\n"); return error; } dev_info(dev, "Current config version on the controller is %d.%d.%d\n", data->cfg_version[0], data->cfg_version[1], data->cfg_version[2]); /* configuration update requires major match */ error = mxt_search_config_array(data, true); /* if no_force_update is false , try again with false as the second parameter to mxt_search_config_array */ if (error && (data->no_force_update == false)) error = mxt_search_config_array(data, false); if (error) { dev_err(dev, "Unable to find matching config in pdata\n"); return error; } return 0; } static void mxt_power_on_delay(struct mxt_data *data) { const struct mxt_platform_data *pdata = data->pdata; const struct mxt_config_info *cfg_info; u32 delay = 0; int i; for (i = 0; i < pdata->config_array_size; i++) { cfg_info = &pdata->config_array[i]; switch (cfg_info->family_id) { case MXT224_ID: delay = max_t(u32, delay, MXT224_POWER_ON_TIME); break; case MXT224E_ID: delay = max_t(u32, delay, MXT224E_POWER_ON_TIME); break; case MXT336S_ID: delay = max_t(u32, delay, MXT336S_POWER_ON_TIME); break; case MXT1386_ID: delay = max_t(u32, delay, max_t(u32, MXT1386_POWER_ON_TIME, MXT1386E_POWER_ON_TIME)); break; case MXT1664S_ID: delay = max_t(u32, delay, MXT1664S_POWER_ON_TIME); break; default: delay = max_t(u32, delay, MXT_POWER_ON_TIME); } } msleep(delay); } static void mxt_reset_delay(struct mxt_data *data) { struct mxt_info *info = &data->info; switch (info->family_id) { case MXT224_ID: msleep(MXT224_RESET_TIME); break; case MXT224E_ID: msleep(MXT224E_RESET_TIME); break; case MXT336S_ID: msleep(MXT336S_RESET_TIME); break; case MXT1386_ID: msleep(max_t(u32, MXT1386_RESET_TIME, MXT1386E_RESET_TIME)); break; case MXT1664S_ID: msleep(MXT1664S_RESET_TIME); break; default: msleep(MXT_RESET_TIME); } } static int mxt_backup_nv(struct mxt_data *data) { int error; u8 command_register; int timeout_counter = 0; /* Backup to memory */ mxt_write_object(data, MXT_GEN_COMMAND_T6, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE); msleep(MXT_BACKUP_TIME); do { error = mxt_read_object(data, MXT_GEN_COMMAND_T6, MXT_COMMAND_BACKUPNV, &command_register); if (error) return error; usleep_range(1000, 2000); } while ((command_register != 0) && (++timeout_counter <= 100)); if (timeout_counter > 100) { dev_err(&data->client->dev, "No response after backup!\n"); return -EIO; } /* Soft reset */ mxt_write_object(data, MXT_GEN_COMMAND_T6, MXT_COMMAND_RESET, 1); mxt_reset_delay(data); return 0; } static int mxt_save_objects(struct mxt_data *data) { struct i2c_client *client = data->client; struct mxt_object *t7_object; struct mxt_object *t9_object; struct mxt_object *t15_object; struct mxt_object *t42_object; int error; /* Store T7 and T9 locally, used in suspend/resume operations */ t7_object = mxt_get_object(data, MXT_GEN_POWER_T7); if (!t7_object) { dev_err(&client->dev, "Failed to get T7 object\n"); return -EINVAL; } data->t7_start_addr = t7_object->start_address; error = __mxt_read_reg(client, data->t7_start_addr, T7_DATA_SIZE, data->t7_data); if (error < 0) { dev_err(&client->dev, "Failed to save current power state\n"); return error; } /* Store T9, T15's min and max report ids */ t9_object = mxt_get_object(data, MXT_TOUCH_MULTI_T9); if (!t9_object) { dev_err(&client->dev, "Failed to get T9 object\n"); return -EINVAL; } data->t9_max_reportid = t9_object->max_reportid; data->t9_min_reportid = t9_object->max_reportid - (t9_object->num_report_ids * (t9_object->instances + 1)) + 1; if (data->pdata->key_codes) { t15_object = mxt_get_object(data, MXT_TOUCH_KEYARRAY_T15); if (!t15_object) dev_dbg(&client->dev, "T15 object is not available\n"); else { data->t15_max_reportid = t15_object->max_reportid; data->t15_min_reportid = t15_object->max_reportid - (t15_object->num_report_ids * (t15_object->instances + 1)) + 1; } } /* Store T42 min and max report ids */ t42_object = mxt_get_object(data, MXT_PROCI_TOUCHSUPPRESSION_T42); if (!t42_object) dev_dbg(&client->dev, "T42 object is not available\n"); else { data->t42_max_reportid = t42_object->max_reportid; data->t42_min_reportid = t42_object->max_reportid - (t42_object->num_report_ids * (t42_object->instances + 1)) + 1; } return 0; } static int mxt_update_cfg(struct mxt_data *data) { int error; const u8 *cfg_ver; /* Get config data from platform data */ error = mxt_get_config(data); if (error) dev_dbg(&data->client->dev, "Config info not found.\n"); /* Check register init values */ if (data->config_info && data->config_info->config) { if (data->update_cfg) { error = mxt_check_reg_init(data); if (error) { dev_err(&data->client->dev, "Failed to check reg init value\n"); return error; } error = mxt_backup_nv(data); if (error) { dev_err(&data->client->dev, "Failed to back up NV\n"); return error; } cfg_ver = data->config_info->config + data->cfg_version_idx; dev_info(&data->client->dev, "Config updated from %d.%d.%d to %d.%d.%d\n", data->cfg_version[0], data->cfg_version[1], data->cfg_version[2], cfg_ver[0], cfg_ver[1], cfg_ver[2]); memcpy(data->cfg_version, cfg_ver, MXT_CFG_VERSION_LEN); } } else { dev_info(&data->client->dev, "No cfg data defined, skipping check reg init\n"); } error = mxt_save_objects(data); if (error) return error; return 0; } static int mxt_initialize(struct mxt_data *data) { struct i2c_client *client = data->client; struct mxt_info *info = &data->info; int error; u8 val; error = mxt_get_info(data); if (error) { /* Try bootloader mode */ error = mxt_switch_to_bootloader_address(data); if (error) return error; error = mxt_check_bootloader(client, MXT_APP_CRC_FAIL); if (error) return error; dev_err(&client->dev, "Application CRC failure\n"); data->state = BOOTLOADER; return 0; } dev_info(&client->dev, "Family ID: %d Variant ID: %d Version: %d.%d " "Build: 0x%02X Object Num: %d\n", info->family_id, info->variant_id, info->version >> 4, info->version & 0xf, info->build, info->object_num); data->state = APPMODE; data->object_table = kcalloc(info->object_num, sizeof(struct mxt_object), GFP_KERNEL); if (!data->object_table) { dev_err(&client->dev, "Failed to allocate memory\n"); return -ENOMEM; } /* Get object table information */ error = mxt_get_object_table(data); if (error) goto free_object_table; error = mxt_update_cfg(data); if (error) goto free_object_table; /* Update matrix size at info struct */ error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, &val); if (error) goto free_object_table; info->matrix_xsize = val; error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, &val); if (error) goto free_object_table; info->matrix_ysize = val; dev_info(&client->dev, "Matrix X Size: %d Matrix Y Size: %d\n", info->matrix_xsize, info->matrix_ysize); return 0; free_object_table: kfree(data->object_table); return error; } 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 val; for (i = 0; i < data->info.object_num; i++) { object = data->object_table + i; count += snprintf(buf + count, PAGE_SIZE - count, "Object[%d] (Type %d)\n", i + 1, object->type); if (count >= PAGE_SIZE) return PAGE_SIZE - 1; if (!mxt_object_readable(object->type)) { count += snprintf(buf + count, PAGE_SIZE - count, "\n"); if (count >= PAGE_SIZE) return PAGE_SIZE - 1; continue; } for (j = 0; j < object->size + 1; j++) { error = mxt_read_object(data, object->type, j, &val); if (error) return error; count += snprintf(buf + count, PAGE_SIZE - count, "\t[%2d]: %02x (%d)\n", j, val, val); if (count >= PAGE_SIZE) return PAGE_SIZE - 1; } count += snprintf(buf + count, PAGE_SIZE - count, "\n"); if (count >= PAGE_SIZE) return PAGE_SIZE - 1; } return count; } static int strtobyte(const char *data, u8 *value) { char str[3]; str[0] = data[0]; str[1] = data[1]; str[2] = '\0'; return kstrtou8(str, 16, value); } static int mxt_load_fw(struct device *dev, const char *fn) { struct mxt_data *data = dev_get_drvdata(dev); struct i2c_client *client = data->client; const struct firmware *fw = NULL; unsigned int frame_size; unsigned int retry = 0; unsigned int pos = 0; int ret, i, max_frame_size; u8 *frame; switch (data->info.family_id) { case MXT224_ID: case MXT224E_ID: case MXT336S_ID: max_frame_size = MXT_SINGLE_FW_MAX_FRAME_SIZE; break; case MXT1386_ID: case MXT1664S_ID: max_frame_size = MXT_CHIPSET_FW_MAX_FRAME_SIZE; break; default: return -EINVAL; } frame = kmalloc(max_frame_size, GFP_KERNEL); if (!frame) { dev_err(dev, "Unable to allocate memory for frame data\n"); return -ENOMEM; } ret = request_firmware(&fw, fn, dev); if (ret < 0) { dev_err(dev, "Unable to open firmware %s\n", fn); goto free_frame; } if (data->state != BOOTLOADER) { /* Change to the bootloader mode */ mxt_write_object(data, MXT_GEN_COMMAND_T6, MXT_COMMAND_RESET, MXT_BOOT_VALUE); mxt_reset_delay(data); ret = mxt_switch_to_bootloader_address(data); if (ret) goto release_firmware; } ret = mxt_check_bootloader(client, MXT_WAITING_BOOTLOAD_CMD); if (ret) { /* Bootloader may still be unlocked from previous update * attempt */ ret = mxt_check_bootloader(client, MXT_WAITING_FRAME_DATA); if (ret) goto return_to_app_mode; } else { dev_info(dev, "Unlocking bootloader\n"); /* Unlock bootloader */ mxt_unlock_bootloader(client); } while (pos < fw->size) { ret = mxt_check_bootloader(client, MXT_WAITING_FRAME_DATA); if (ret) goto release_firmware; /* Get frame length MSB */ ret = strtobyte(fw->data + pos, frame); if (ret) goto release_firmware; /* Get frame length LSB */ ret = strtobyte(fw->data + pos + 2, frame + 1); if (ret) goto release_firmware; frame_size = ((*frame << 8) | *(frame + 1)); /* We should add 2 at frame size as the the firmware data is not * included the CRC bytes. */ frame_size += 2; if (frame_size > max_frame_size) { dev_err(dev, "Invalid frame size - %d\n", frame_size); ret = -EINVAL; goto release_firmware; } /* Convert frame data and CRC from hex to binary */ for (i = 2; i < frame_size; i++) { ret = strtobyte(fw->data + pos + i * 2, frame + i); if (ret) goto release_firmware; } /* Write one frame to device */ mxt_fw_write(client, frame, frame_size); ret = mxt_check_bootloader(client, MXT_FRAME_CRC_PASS); if (ret) { retry++; /* Back off by 20ms per retry */ msleep(retry * 20); if (retry > 20) goto release_firmware; } else { retry = 0; pos += frame_size * 2; dev_dbg(dev, "Updated %d/%zd bytes\n", pos, fw->size); } } return_to_app_mode: mxt_switch_to_appmode_address(data); release_firmware: release_firmware(fw); free_frame: kfree(frame); return ret; } static const char * mxt_search_fw_name(struct mxt_data *data, u8 bootldr_id) { const struct mxt_platform_data *pdata = data->pdata; const struct mxt_config_info *cfg_info; const char *fw_name = NULL; int i; for (i = 0; i < pdata->config_array_size; i++) { cfg_info = &pdata->config_array[i]; if (bootldr_id == cfg_info->bootldr_id && cfg_info->fw_name) { data->config_info = cfg_info; data->info.family_id = cfg_info->family_id; fw_name = cfg_info->fw_name; } } return fw_name; } static ssize_t mxt_force_cfg_update_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct mxt_data *data = dev_get_drvdata(dev); int flag = buf[0]-'0'; int error; data->no_force_update = !flag; if (data->state == APPMODE) { disable_irq(data->irq); error = mxt_update_cfg(data); enable_irq(data->irq); if (error) return error; } else { dev_err(dev, "Not in APPMODE, Unable to force cfg update\n"); return -EINVAL; } return count; } 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, address; const char *fw_name; u8 bootldr_id; u8 cfg_version[MXT_CFG_VERSION_LEN] = {0}; data->no_force_update = false; /* If fw_name is set, then the existing firmware has an upgrade */ if (!data->fw_name) { /* * If the device boots up in the bootloader mode, check if * there is a firmware to upgrade. */ if (data->state == BOOTLOADER) { bootldr_id = mxt_get_bootloader_id(data->client); if (bootldr_id <= 0) { dev_err(dev, "Unable to retrieve bootloader id\n"); return -EINVAL; } fw_name = mxt_search_fw_name(data, bootldr_id); if (fw_name == NULL) { dev_err(dev, "Unable to find fw from bootloader id\n"); return -EINVAL; } } else { /* In APPMODE, if the f/w name does not exist, quit */ dev_err(dev, "Firmware name not specified in platform data\n"); return -EINVAL; } } else { fw_name = data->fw_name; } dev_info(dev, "Upgrading the firmware file to %s\n", fw_name); disable_irq(data->irq); error = mxt_load_fw(dev, fw_name); if (error) { dev_err(dev, "The firmware update failed(%d)\n", error); count = error; } else { dev_info(dev, "The firmware update succeeded\n"); /* Wait for reset */ msleep(MXT_FWRESET_TIME); data->state = INIT; kfree(data->object_table); data->object_table = NULL; data->cfg_version_idx = 0; data->config_info = NULL; data->update_cfg = false; /* T38 object address might have changed, read it from touch controller */ address = mxt_get_object_address(dev, MXT_SPT_USERDATA_T38); if (address < 0) { dev_err(dev, "T38 required for touch operation\n"); return -EINVAL; } data->t38_start_addr = address; error = __mxt_write_reg(data->client, data->t38_start_addr, sizeof(cfg_version), cfg_version); if (error) dev_err(dev, "Unable to zero out config version after fw upgrade\n"); mxt_initialize(data); } if (data->state == APPMODE) { enable_irq(data->irq); error = mxt_make_highchg(data); if (error) return error; } return count; } #if defined(CONFIG_SECURE_TOUCH) 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); unsigned long value; int err = 0; if (count > 2) return -EINVAL; err = kstrtoul(buf, 10, &value); if (err != 0) return err; err = count; switch (value) { case 0: if (atomic_read(&data->st_enabled) == 0) break; pm_runtime_put(&data->client->adapter->dev); atomic_set(&data->st_enabled, 0); complete(&data->st_completion); 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(data->client->adapter->dev.parent) < 0) { dev_err(&data->client->dev, "pm_runtime_get failed\n"); err = -EIO; break; } INIT_COMPLETION(data->st_completion); INIT_COMPLETION(data->st_powerdown); atomic_set(&data->st_pending_irqs, 0); atomic_set(&data->st_enabled, 1); 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 err; if (atomic_read(&data->st_enabled) == 0) return -EBADF; err = wait_for_completion_interruptible(&data->st_completion); if (err) return err; if (atomic_cmpxchg(&data->st_pending_irqs, 1, 0) != 1) return -EINVAL; return scnprintf(buf, PAGE_SIZE, "%u", 1); } static DEVICE_ATTR(secure_touch_enable, 0666, mxt_secure_touch_enable_show, mxt_secure_touch_enable_store); static DEVICE_ATTR(secure_touch, 0444, mxt_secure_touch_show, NULL); #endif static DEVICE_ATTR(object, 0444, mxt_object_show, NULL); static DEVICE_ATTR(update_fw, 0664, NULL, mxt_update_fw_store); static DEVICE_ATTR(force_cfg_update, 0664, NULL, mxt_force_cfg_update_store); static struct attribute *mxt_attrs[] = { &dev_attr_object.attr, &dev_attr_update_fw.attr, &dev_attr_force_cfg_update.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, }; #if defined(CONFIG_SECURE_TOUCH) static void mxt_secure_touch_stop(struct mxt_data *data) { if (atomic_read(&data->st_enabled)) { complete(&data->st_completion); wait_for_completion_interruptible(&data->st_powerdown); } } #else static void mxt_secure_touch_stop(struct mxt_data *data) { } #endif static int mxt_start(struct mxt_data *data) { int error; mxt_secure_touch_stop(data); /* restore the old power state values and reenable touch */ error = __mxt_write_reg(data->client, data->t7_start_addr, T7_DATA_SIZE, data->t7_data); if (error < 0) { dev_err(&data->client->dev, "failed to restore old power state\n"); return error; } return 0; } static int mxt_stop(struct mxt_data *data) { int error; u8 t7_data[T7_DATA_SIZE] = {0}; mxt_secure_touch_stop(data); error = __mxt_write_reg(data->client, data->t7_start_addr, T7_DATA_SIZE, t7_data); if (error < 0) { dev_err(&data->client->dev, "failed to configure deep sleep mode\n"); return error; } return 0; } static int mxt_input_open(struct input_dev *dev) { struct mxt_data *data = input_get_drvdata(dev); int error; if (data->state == APPMODE) { error = mxt_start(data); if (error < 0) { dev_err(&data->client->dev, "mxt_start failed in input_open\n"); return error; } } return 0; } static void mxt_input_close(struct input_dev *dev) { struct mxt_data *data = input_get_drvdata(dev); int error; if (data->state == APPMODE) { error = mxt_stop(data); if (error < 0) dev_err(&data->client->dev, "mxt_stop failed in input_close\n"); } } static int reg_set_optimum_mode_check(struct regulator *reg, int load_uA) { return (regulator_count_voltages(reg) > 0) ? regulator_set_optimum_mode(reg, load_uA) : 0; } static int mxt_power_on(struct mxt_data *data, bool on) { int rc; if (on == false) goto power_off; rc = reg_set_optimum_mode_check(data->vcc_ana, MXT_ACTIVE_LOAD_UA); if (rc < 0) { dev_err(&data->client->dev, "Regulator vcc_ana set_opt failed rc=%d\n", rc); return rc; } rc = regulator_enable(data->vcc_ana); if (rc) { dev_err(&data->client->dev, "Regulator vcc_ana enable failed rc=%d\n", rc); goto error_reg_en_vcc_ana; } if (data->pdata->digital_pwr_regulator) { rc = reg_set_optimum_mode_check(data->vcc_dig, MXT_ACTIVE_LOAD_DIG_UA); if (rc < 0) { dev_err(&data->client->dev, "Regulator vcc_dig set_opt failed rc=%d\n", rc); goto error_reg_opt_vcc_dig; } rc = regulator_enable(data->vcc_dig); if (rc) { dev_err(&data->client->dev, "Regulator vcc_dig enable failed rc=%d\n", rc); goto error_reg_en_vcc_dig; } } if (data->pdata->i2c_pull_up) { rc = reg_set_optimum_mode_check(data->vcc_i2c, MXT_I2C_LOAD_UA); if (rc < 0) { dev_err(&data->client->dev, "Regulator vcc_i2c set_opt failed rc=%d\n", rc); goto error_reg_opt_i2c; } rc = regulator_enable(data->vcc_i2c); if (rc) { dev_err(&data->client->dev, "Regulator vcc_i2c enable failed rc=%d\n", rc); goto error_reg_en_vcc_i2c; } } msleep(130); return 0; error_reg_en_vcc_i2c: if (data->pdata->i2c_pull_up) reg_set_optimum_mode_check(data->vcc_i2c, 0); error_reg_opt_i2c: if (data->pdata->digital_pwr_regulator) regulator_disable(data->vcc_dig); error_reg_en_vcc_dig: if (data->pdata->digital_pwr_regulator) reg_set_optimum_mode_check(data->vcc_dig, 0); error_reg_opt_vcc_dig: regulator_disable(data->vcc_ana); error_reg_en_vcc_ana: reg_set_optimum_mode_check(data->vcc_ana, 0); return rc; power_off: reg_set_optimum_mode_check(data->vcc_ana, 0); regulator_disable(data->vcc_ana); if (data->pdata->digital_pwr_regulator) { reg_set_optimum_mode_check(data->vcc_dig, 0); regulator_disable(data->vcc_dig); } if (data->pdata->i2c_pull_up) { reg_set_optimum_mode_check(data->vcc_i2c, 0); regulator_disable(data->vcc_i2c); } msleep(50); return 0; } static int mxt_regulator_configure(struct mxt_data *data, bool on) { int rc; if (on == false) goto hw_shutdown; data->vcc_ana = regulator_get(&data->client->dev, "vdd_ana"); if (IS_ERR(data->vcc_ana)) { rc = PTR_ERR(data->vcc_ana); dev_err(&data->client->dev, "Regulator get failed vcc_ana rc=%d\n", rc); return rc; } if (regulator_count_voltages(data->vcc_ana) > 0) { rc = regulator_set_voltage(data->vcc_ana, MXT_VTG_MIN_UV, MXT_VTG_MAX_UV); if (rc) { dev_err(&data->client->dev, "regulator set_vtg failed rc=%d\n", rc); goto error_set_vtg_vcc_ana; } } if (data->pdata->digital_pwr_regulator) { data->vcc_dig = regulator_get(&data->client->dev, "vdd_dig"); if (IS_ERR(data->vcc_dig)) { rc = PTR_ERR(data->vcc_dig); dev_err(&data->client->dev, "Regulator get dig failed rc=%d\n", rc); goto error_get_vtg_vcc_dig; } if (regulator_count_voltages(data->vcc_dig) > 0) { rc = regulator_set_voltage(data->vcc_dig, MXT_VTG_DIG_MIN_UV, MXT_VTG_DIG_MAX_UV); if (rc) { dev_err(&data->client->dev, "regulator set_vtg failed rc=%d\n", rc); goto error_set_vtg_vcc_dig; } } } if (data->pdata->i2c_pull_up) { data->vcc_i2c = regulator_get(&data->client->dev, "vcc_i2c"); if (IS_ERR(data->vcc_i2c)) { rc = PTR_ERR(data->vcc_i2c); dev_err(&data->client->dev, "Regulator get failed rc=%d\n", rc); goto error_get_vtg_i2c; } if (regulator_count_voltages(data->vcc_i2c) > 0) { rc = regulator_set_voltage(data->vcc_i2c, MXT_I2C_VTG_MIN_UV, MXT_I2C_VTG_MAX_UV); if (rc) { dev_err(&data->client->dev, "regulator set_vtg failed rc=%d\n", rc); goto error_set_vtg_i2c; } } } return 0; error_set_vtg_i2c: regulator_put(data->vcc_i2c); error_get_vtg_i2c: if (data->pdata->digital_pwr_regulator) if (regulator_count_voltages(data->vcc_dig) > 0) regulator_set_voltage(data->vcc_dig, 0, MXT_VTG_DIG_MAX_UV); error_set_vtg_vcc_dig: if (data->pdata->digital_pwr_regulator) regulator_put(data->vcc_dig); error_get_vtg_vcc_dig: if (regulator_count_voltages(data->vcc_ana) > 0) regulator_set_voltage(data->vcc_ana, 0, MXT_VTG_MAX_UV); error_set_vtg_vcc_ana: regulator_put(data->vcc_ana); return rc; hw_shutdown: if (regulator_count_voltages(data->vcc_ana) > 0) regulator_set_voltage(data->vcc_ana, 0, MXT_VTG_MAX_UV); regulator_put(data->vcc_ana); if (data->pdata->digital_pwr_regulator) { if (regulator_count_voltages(data->vcc_dig) > 0) regulator_set_voltage(data->vcc_dig, 0, MXT_VTG_DIG_MAX_UV); regulator_put(data->vcc_dig); } if (data->pdata->i2c_pull_up) { if (regulator_count_voltages(data->vcc_i2c) > 0) regulator_set_voltage(data->vcc_i2c, 0, MXT_I2C_VTG_MAX_UV); regulator_put(data->vcc_i2c); } return 0; } #ifdef CONFIG_PM static int mxt_regulator_lpm(struct mxt_data *data, bool on) { int rc; if (on == false) goto regulator_hpm; rc = reg_set_optimum_mode_check(data->vcc_ana, MXT_LPM_LOAD_UA); if (rc < 0) { dev_err(&data->client->dev, "Regulator vcc_ana set_opt failed rc=%d\n", rc); goto fail_regulator_lpm; } if (data->pdata->digital_pwr_regulator) { rc = reg_set_optimum_mode_check(data->vcc_dig, MXT_LPM_LOAD_DIG_UA); if (rc < 0) { dev_err(&data->client->dev, "Regulator vcc_dig set_opt failed rc=%d\n", rc); goto fail_regulator_lpm; } } if (data->pdata->i2c_pull_up) { rc = reg_set_optimum_mode_check(data->vcc_i2c, MXT_I2C_LPM_LOAD_UA); if (rc < 0) { dev_err(&data->client->dev, "Regulator vcc_i2c set_opt failed rc=%d\n", rc); goto fail_regulator_lpm; } } return 0; regulator_hpm: rc = reg_set_optimum_mode_check(data->vcc_ana, MXT_ACTIVE_LOAD_UA); if (rc < 0) { dev_err(&data->client->dev, "Regulator vcc_ana set_opt failed rc=%d\n", rc); goto fail_regulator_hpm; } if (data->pdata->digital_pwr_regulator) { rc = reg_set_optimum_mode_check(data->vcc_dig, MXT_ACTIVE_LOAD_DIG_UA); if (rc < 0) { dev_err(&data->client->dev, "Regulator vcc_dig set_opt failed rc=%d\n", rc); goto fail_regulator_hpm; } } if (data->pdata->i2c_pull_up) { rc = reg_set_optimum_mode_check(data->vcc_i2c, MXT_I2C_LOAD_UA); if (rc < 0) { dev_err(&data->client->dev, "Regulator vcc_i2c set_opt failed rc=%d\n", rc); goto fail_regulator_hpm; } } return 0; fail_regulator_lpm: reg_set_optimum_mode_check(data->vcc_ana, MXT_ACTIVE_LOAD_UA); if (data->pdata->digital_pwr_regulator) reg_set_optimum_mode_check(data->vcc_dig, MXT_ACTIVE_LOAD_DIG_UA); if (data->pdata->i2c_pull_up) reg_set_optimum_mode_check(data->vcc_i2c, MXT_I2C_LOAD_UA); return rc; fail_regulator_hpm: reg_set_optimum_mode_check(data->vcc_ana, MXT_LPM_LOAD_UA); if (data->pdata->digital_pwr_regulator) reg_set_optimum_mode_check(data->vcc_dig, MXT_LPM_LOAD_DIG_UA); if (data->pdata->i2c_pull_up) reg_set_optimum_mode_check(data->vcc_i2c, MXT_I2C_LPM_LOAD_UA); return rc; } static int mxt_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct mxt_data *data = i2c_get_clientdata(client); struct input_dev *input_dev = data->input_dev; int error; mutex_lock(&input_dev->mutex); if (input_dev->users) { error = mxt_stop(data); if (error < 0) { dev_err(dev, "mxt_stop failed in suspend\n"); mutex_unlock(&input_dev->mutex); return error; } } mutex_unlock(&input_dev->mutex); /* put regulators in low power mode */ error = mxt_regulator_lpm(data, true); if (error < 0) { dev_err(dev, "failed to enter low power mode\n"); return error; } return 0; } static int mxt_resume(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct mxt_data *data = i2c_get_clientdata(client); struct input_dev *input_dev = data->input_dev; int error; /* put regulators in high power mode */ error = mxt_regulator_lpm(data, false); if (error < 0) { dev_err(dev, "failed to enter high power mode\n"); return error; } mutex_lock(&input_dev->mutex); if (input_dev->users) { error = mxt_start(data); if (error < 0) { dev_err(dev, "mxt_start failed in resume\n"); mutex_unlock(&input_dev->mutex); return error; } } /* calibrate */ if (data->pdata->need_calibration) { mxt_secure_touch_stop(data); error = mxt_write_object(data, MXT_GEN_COMMAND_T6, MXT_COMMAND_CALIBRATE, 1); if (error < 0) dev_dbg(dev, "sending calibration command failed\n"); } mutex_unlock(&input_dev->mutex); return 0; } 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 static int mxt_debugfs_object_show(struct seq_file *m, void *v) { struct mxt_data *data = m->private; struct mxt_object *object; struct device *dev = &data->client->dev; int i, j, k; int error; int obj_size; u8 val; for (i = 0; i < data->info.object_num; i++) { object = data->object_table + i; obj_size = object->size + 1; seq_printf(m, "Object[%d] (Type %d)\n", i + 1, object->type); for (j = 0; j < object->instances + 1; j++) { seq_printf(m, "[Instance %d]\n", j); for (k = 0; k < obj_size; k++) { error = mxt_read_object(data, object->type, j * obj_size + k, &val); if (error) { dev_err(dev, "Failed to read object %d " "instance %d at offset %d\n", object->type, j, k); return error; } seq_printf(m, "Byte %d: 0x%02x (%d)\n", k, val, val); } } } return 0; } static int mxt_debugfs_object_open(struct inode *inode, struct file *file) { return single_open(file, mxt_debugfs_object_show, inode->i_private); } static const struct file_operations mxt_object_fops = { .owner = THIS_MODULE, .open = mxt_debugfs_object_open, .read = seq_read, .release = single_release, }; static void __devinit mxt_debugfs_init(struct mxt_data *data) { debug_base = debugfs_create_dir(MXT_DEBUGFS_DIR, NULL); if (IS_ERR_OR_NULL(debug_base)) pr_err("atmel_mxt_ts: Failed to create debugfs dir\n"); if (IS_ERR_OR_NULL(debugfs_create_file(MXT_DEBUGFS_FILE, 0444, debug_base, data, &mxt_object_fops))) { pr_err("atmel_mxt_ts: Failed to create object file\n"); debugfs_remove_recursive(debug_base); } } #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; int coords_size, rc; 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; } rc = of_property_read_u32_array(np, name, coords, coords_size); if (rc && (rc != -EINVAL)) { dev_err(dev, "Unable to read %s\n", name); return rc; } if (strncmp(name, "atmel,panel-coords", sizeof("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 (strncmp(name, "atmel,display-coords", sizeof("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_parse_config(struct device *dev, struct device_node *np, struct mxt_config_info *info) { struct property *prop; u8 *temp_cfg; prop = of_find_property(np, "atmel,config", &info->config_length); if (!prop) { dev_err(dev, "Looking up %s property in node %s failed", "atmel,config", np->full_name); return -ENODEV; } else if (!info->config_length) { dev_err(dev, "Invalid length of configuration data\n"); return -EINVAL; } temp_cfg = devm_kzalloc(dev, info->config_length * sizeof(u8), GFP_KERNEL); if (!temp_cfg) { dev_err(dev, "Unable to allocate memory to store cfg\n"); return -ENOMEM; } memcpy(temp_cfg, prop->value, info->config_length); info->config = temp_cfg; return 0; } static int mxt_parse_dt(struct device *dev, struct mxt_platform_data *pdata) { int rc; struct mxt_config_info *info; struct device_node *temp, *np = dev->of_node; struct property *prop; u32 temp_val; rc = mxt_get_dt_coords(dev, "atmel,panel-coords", pdata); if (rc) return rc; rc = mxt_get_dt_coords(dev, "atmel,display-coords", pdata); if (rc) return rc; /* regulator info */ pdata->i2c_pull_up = of_property_read_bool(np, "atmel,i2c-pull-up"); pdata->digital_pwr_regulator = of_property_read_bool(np, "atmel,dig-reg-support"); pdata->no_force_update = of_property_read_bool(np, "atmel,no-force-update"); /* reset, irq gpio info */ pdata->reset_gpio = of_get_named_gpio_flags(np, "atmel,reset-gpio", 0, &pdata->reset_gpio_flags); pdata->irq_gpio = of_get_named_gpio_flags(np, "atmel,irq-gpio", 0, &pdata->irq_gpio_flags); /* 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) { rc = of_property_read_u32_array(np, "atmel,key-codes", pdata->key_codes, MXT_KEYARRAY_MAX_KEYS); if (rc) { dev_err(dev, "Unable to read key codes\n"); return rc; } } else return -EINVAL; } /* need calibration during wakeup? */ pdata->need_calibration = of_property_read_bool(np, "atmel,need-calibration"); /* config array size */ pdata->config_array_size = 0; temp = NULL; while ((temp = of_get_next_child(np, temp))) pdata->config_array_size++; if (!pdata->config_array_size) return 0; info = devm_kzalloc(dev, pdata->config_array_size * sizeof(struct mxt_config_info), GFP_KERNEL); if (!info) { dev_err(dev, "Unable to allocate memory\n"); return -ENOMEM; } rc = of_property_read_u32(np, "atmel,bl-addr", &temp_val); if (rc && (rc != -EINVAL)) dev_err(dev, "Unable to read bootloader address\n"); else if (rc != -EINVAL) pdata->bl_addr = (u8) temp_val; pdata->config_array = info; for_each_child_of_node(np, temp) { rc = of_property_read_string(temp, "atmel,fw-name", &info->fw_name); if (rc && (rc != -EINVAL)) { dev_err(dev, "Unable to read fw name\n"); return rc; } rc = of_property_read_u32(temp, "atmel,family-id", &temp_val); if (rc) { dev_err(dev, "Unable to read family id\n"); return rc; } else info->family_id = (u8) temp_val; rc = of_property_read_u32(temp, "atmel,variant-id", &temp_val); if (rc) { dev_err(dev, "Unable to read variant id\n"); return rc; } else info->variant_id = (u8) temp_val; rc = of_property_read_u32(temp, "atmel,version", &temp_val); if (rc) { dev_err(dev, "Unable to read controller version\n"); return rc; } else info->version = (u8) temp_val; rc = of_property_read_u32(temp, "atmel,build", &temp_val); if (rc) { dev_err(dev, "Unable to read build id\n"); return rc; } else info->build = (u8) temp_val; rc = of_property_read_u32(temp, "atmel,bootldr-id", &temp_val); if (rc && (rc != -EINVAL)) dev_err(dev, "Unable to read bootldr-id\n"); else if (rc != -EINVAL) info->bootldr_id = (u8) temp_val; rc = mxt_parse_config(dev, temp, info); if (rc) { dev_err(dev, "Unable to parse config data\n"); return rc; } info++; } return 0; } #else static int mxt_parse_dt(struct device *dev, struct mxt_platform_data *pdata) { return -ENODEV; } #endif #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 && event == FB_EVENT_BLANK && mxt_dev_data && mxt_dev_data->client) { 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 #if defined(CONFIG_SECURE_TOUCH) static void __devinit mxt_secure_touch_init(struct mxt_data *data) { init_completion(&data->st_completion); init_completion(&data->st_powerdown); } #else static void __devinit mxt_secure_touch_init(struct mxt_data *data) { } #endif static int __devinit mxt_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct mxt_platform_data *pdata; struct mxt_data *data; struct input_dev *input_dev; int error, i; 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 = kzalloc(sizeof(struct mxt_data), GFP_KERNEL); input_dev = input_allocate_device(); if (!data || !input_dev) { dev_err(&client->dev, "Failed to allocate memory\n"); error = -ENOMEM; goto err_free_mem; } data->state = INIT; input_dev->name = "atmel_mxt_ts"; input_dev->id.bustype = BUS_I2C; input_dev->dev.parent = &client->dev; input_dev->open = mxt_input_open; input_dev->close = mxt_input_close; data->client = client; data->input_dev = input_dev; data->pdata = pdata; data->no_force_update = pdata->no_force_update; __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); /* For single touch */ input_set_abs_params(input_dev, ABS_X, pdata->disp_minx, pdata->disp_maxx, 0, 0); input_set_abs_params(input_dev, ABS_Y, pdata->disp_miny, pdata->disp_maxy, 0, 0); input_set_abs_params(input_dev, ABS_PRESSURE, 0, 255, 0, 0); /* For multi touch */ input_mt_init_slots(input_dev, MXT_MAX_FINGER); 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, pdata->disp_minx, pdata->disp_maxx, 0, 0); input_set_abs_params(input_dev, ABS_MT_POSITION_Y, pdata->disp_miny, pdata->disp_maxy, 0, 0); input_set_abs_params(input_dev, ABS_MT_PRESSURE, 0, 255, 0, 0); /* set key array supported keys */ if (pdata->key_codes) { for (i = 0; i < MXT_KEYARRAY_MAX_KEYS; i++) { if (pdata->key_codes[i]) input_set_capability(input_dev, EV_KEY, pdata->key_codes[i]); } } input_set_drvdata(input_dev, data); i2c_set_clientdata(client, data); if (pdata->init_hw) error = pdata->init_hw(true); else error = mxt_regulator_configure(data, true); if (error) { dev_err(&client->dev, "Failed to intialize hardware\n"); goto err_free_mem; } if (gpio_is_valid(pdata->reset_gpio)) { /* configure touchscreen reset out gpio */ error = gpio_request(pdata->reset_gpio, "mxt_reset_gpio"); if (error) { dev_err(&client->dev, "unable to request gpio [%d]\n", pdata->reset_gpio); goto err_regulator_on; } error = gpio_direction_output(pdata->reset_gpio, 0); if (error) { dev_err(&client->dev, "unable to set direction for gpio [%d]\n", pdata->reset_gpio); goto err_reset_gpio_req; } mxt_reset_delay(data); } if (pdata->power_on) error = pdata->power_on(true); else error = mxt_power_on(data, true); if (error) { dev_err(&client->dev, "Failed to power on hardware\n"); goto err_reset_gpio_req; } if (gpio_is_valid(pdata->irq_gpio)) { /* configure touchscreen irq gpio */ error = gpio_request(pdata->irq_gpio, "mxt_irq_gpio"); if (error) { dev_err(&client->dev, "unable to request gpio [%d]\n", pdata->irq_gpio); goto err_power_on; } error = gpio_direction_input(pdata->irq_gpio); if (error) { dev_err(&client->dev, "unable to set direction for gpio [%d]\n", pdata->irq_gpio); goto err_irq_gpio_req; } data->irq = client->irq = gpio_to_irq(pdata->irq_gpio); } else { dev_err(&client->dev, "irq gpio not provided\n"); goto err_power_on; } if (gpio_is_valid(pdata->reset_gpio)) { error = gpio_direction_output(pdata->reset_gpio, 1); if (error) { dev_err(&client->dev, "unable to set direction for gpio [%d]\n", pdata->reset_gpio); goto err_irq_gpio_req; } } mxt_power_on_delay(data); data->addr_pair.application = data->client->addr; if (pdata->bl_addr) data->addr_pair.bootloader = pdata->bl_addr; else mxt_lookup_bootloader_address(data); error = mxt_initialize(data); if (error) goto err_irq_gpio_req; error = request_threaded_irq(client->irq, NULL, mxt_interrupt, pdata->irqflags, client->dev.driver->name, data); if (error) { dev_err(&client->dev, "Failed to register interrupt\n"); goto err_free_object; } if (data->state == APPMODE) { error = mxt_make_highchg(data); if (error) { dev_err(&client->dev, "Failed to make high CHG\n"); goto err_free_irq; } } error = input_register_device(input_dev); if (error) goto err_free_irq; error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group); if (error) goto err_unregister_device; #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); #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_debugfs_init(data); mxt_secure_touch_init(data); return 0; err_unregister_device: input_unregister_device(input_dev); input_dev = NULL; err_free_irq: free_irq(client->irq, data); err_free_object: kfree(data->object_table); err_irq_gpio_req: if (gpio_is_valid(pdata->irq_gpio)) gpio_free(pdata->irq_gpio); err_power_on: if (pdata->power_on) pdata->power_on(false); else mxt_power_on(data, false); err_reset_gpio_req: if (gpio_is_valid(pdata->reset_gpio)) gpio_free(pdata->reset_gpio); err_regulator_on: if (pdata->init_hw) pdata->init_hw(false); else mxt_regulator_configure(data, false); err_free_mem: input_free_device(input_dev); kfree(data); return error; } static int __devexit mxt_remove(struct i2c_client *client) { struct mxt_data *data = i2c_get_clientdata(client); sysfs_remove_group(&client->dev.kobj, &mxt_attr_group); free_irq(data->irq, data); input_unregister_device(data->input_dev); #if defined(CONFIG_FB) if (fb_unregister_client(&data->fb_notif)) dev_err(&client->dev, "Error occurred while unregistering fb_notifier.\n"); #elif defined(CONFIG_HAS_EARLYSUSPEND) unregister_early_suspend(&data->early_suspend); #endif if (data->pdata->power_on) data->pdata->power_on(false); else mxt_power_on(data, false); if (data->pdata->init_hw) data->pdata->init_hw(false); else mxt_regulator_configure(data, false); if (gpio_is_valid(data->pdata->reset_gpio)) gpio_free(data->pdata->reset_gpio); if (gpio_is_valid(data->pdata->irq_gpio)) gpio_free(data->pdata->irq_gpio); kfree(data->object_table); kfree(data); debugfs_remove_recursive(debug_base); return 0; } static const struct i2c_device_id mxt_id[] = { { "qt602240_ts", 0 }, { "atmel_mxt_ts", 0 }, { "mXT224", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, mxt_id); #ifdef CONFIG_OF static struct of_device_id mxt_match_table[] = { { .compatible = "atmel,mxt-ts",}, { }, }; #else #define mxt_match_table NULL #endif static struct i2c_driver mxt_driver = { .driver = { .name = "atmel_mxt_ts", .owner = THIS_MODULE, .of_match_table = mxt_match_table, #ifdef CONFIG_PM .pm = &mxt_pm_ops, #endif }, .probe = mxt_probe, .remove = __devexit_p(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");