| /* |
| * Atmel maXTouch Touchscreen driver |
| * |
| * Copyright (C) 2010 Samsung Electronics Co.Ltd |
| * Author: Joonyoung Shim <jy0922.shim@samsung.com> |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the |
| * Free Software Foundation; either version 2 of the License, or (at your |
| * option) any later version. |
| * |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/delay.h> |
| #include <linux/firmware.h> |
| #include <linux/i2c.h> |
| #include <linux/i2c/atmel_mxt_ts.h> |
| #include <linux/input/mt.h> |
| #include <linux/interrupt.h> |
| #include <linux/slab.h> |
| |
| /* Version */ |
| #define MXT_VER_20 20 |
| #define MXT_VER_21 21 |
| #define MXT_VER_22 22 |
| |
| /* Slave addresses */ |
| #define MXT_APP_LOW 0x4a |
| #define MXT_APP_HIGH 0x4b |
| #define MXT_BOOT_LOW 0x24 |
| #define MXT_BOOT_HIGH 0x25 |
| |
| /* Firmware */ |
| #define MXT_FW_NAME "maxtouch.fw" |
| |
| /* 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_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 |
| |
| /* 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_MULTI_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 |
| |
| /* Define for MXT_GEN_COMMAND_T6 */ |
| #define MXT_BOOT_VALUE 0xa5 |
| #define MXT_BACKUP_VALUE 0x55 |
| #define MXT_BACKUP_TIME 25 /* msec */ |
| #define MXT_RESET_TIME 65 /* msec */ |
| |
| #define MXT_FWRESET_TIME 175 /* msec */ |
| |
| /* Command to unlock bootloader */ |
| #define MXT_UNLOCK_CMD_MSB 0xaa |
| #define MXT_UNLOCK_CMD_LSB 0xdc |
| |
| /* Bootloader mode status */ |
| #define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */ |
| #define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */ |
| #define MXT_FRAME_CRC_CHECK 0x02 |
| #define MXT_FRAME_CRC_FAIL 0x03 |
| #define MXT_FRAME_CRC_PASS 0x04 |
| #define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */ |
| #define MXT_BOOT_STATUS_MASK 0x3f |
| |
| /* 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) |
| |
| /* Touchscreen absolute values */ |
| #define MXT_MAX_AREA 0xff |
| |
| #define MXT_MAX_FINGER 10 |
| |
| 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; |
| }; |
| |
| /* Each client has this additional data */ |
| struct mxt_data { |
| struct i2c_client *client; |
| struct input_dev *input_dev; |
| const struct mxt_platform_data *pdata; |
| struct mxt_object *object_table; |
| struct mxt_info info; |
| struct mxt_finger finger[MXT_MAX_FINGER]; |
| unsigned int irq; |
| unsigned int max_x; |
| unsigned int max_y; |
| }; |
| |
| 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_PROCI_ONETOUCH_T24: |
| case MXT_PROCI_TWOTOUCH_T27: |
| case MXT_PROCI_GRIP_T40: |
| case MXT_PROCI_PALM_T41: |
| case MXT_PROCI_TOUCHSUPPRESSION_T42: |
| case MXT_PROCI_STYLUS_T47: |
| case MXT_PROCG_NOISESUPPRESSION_T48: |
| case MXT_SPT_COMMSCONFIG_T18: |
| case MXT_SPT_GPIOPWM_T19: |
| case MXT_SPT_SELFTEST_T25: |
| case MXT_SPT_CTECONFIG_T28: |
| case MXT_SPT_USERDATA_T38: |
| case MXT_SPT_DIGITIZER_T43: |
| case MXT_SPT_CTECONFIG_T46: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| static 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_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_DIGITIZER_T43: |
| case MXT_SPT_CTECONFIG_T46: |
| 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_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: |
| case MXT_WAITING_FRAME_DATA: |
| val &= ~MXT_BOOT_STATUS_MASK; |
| break; |
| case MXT_FRAME_CRC_PASS: |
| if (val == MXT_FRAME_CRC_CHECK) |
| goto recheck; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| if (val != state) { |
| dev_err(&client->dev, "Unvalid bootloader mode state\n"); |
| 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]; |
| |
| 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; |
| |
| if (i2c_transfer(client->adapter, xfer, 2) != 2) { |
| dev_err(&client->dev, "%s: i2c transfer failed\n", __func__); |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| 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 reg, u8 val) |
| { |
| u8 buf[3]; |
| |
| buf[0] = reg & 0xff; |
| buf[1] = (reg >> 8) & 0xff; |
| buf[2] = val; |
| |
| if (i2c_master_send(client, buf, 3) != 3) { |
| dev_err(&client->dev, "%s: i2c send failed\n", __func__); |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| 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_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); |
| 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); |
| } else { |
| finger[id].status = 0; |
| } |
| } |
| |
| input_report_key(input_dev, BTN_TOUCH, finger_num > 0); |
| |
| 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_sync(input_dev); |
| } |
| |
| 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; |
| |
| /* 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->max_x < 1024) |
| x = x >> 2; |
| if (data->max_y < 1024) |
| y = y >> 2; |
| |
| area = message->message[4]; |
| |
| 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; |
| |
| mxt_input_report(data, id); |
| } |
| |
| static irqreturn_t mxt_interrupt(int irq, void *dev_id) |
| { |
| struct mxt_data *data = dev_id; |
| struct mxt_message message; |
| struct mxt_object *object; |
| struct device *dev = &data->client->dev; |
| int id; |
| u8 reportid; |
| u8 max_reportid; |
| u8 min_reportid; |
| |
| do { |
| if (mxt_read_message(data, &message)) { |
| dev_err(dev, "Failed to read message\n"); |
| goto end; |
| } |
| |
| reportid = message.reportid; |
| |
| /* whether reportid is thing of MXT_TOUCH_MULTI_T9 */ |
| object = mxt_get_object(data, MXT_TOUCH_MULTI_T9); |
| if (!object) |
| goto end; |
| |
| max_reportid = object->max_reportid; |
| min_reportid = max_reportid - object->num_report_ids + 1; |
| id = reportid - min_reportid; |
| |
| if (reportid >= min_reportid && reportid <= max_reportid) |
| mxt_input_touchevent(data, &message, id); |
| 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_platform_data *pdata = data->pdata; |
| struct mxt_object *object; |
| struct device *dev = &data->client->dev; |
| int index = 0; |
| int i, j, config_offset; |
| |
| if (!pdata->config) { |
| 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) * (object->instances + 1); |
| j++) { |
| config_offset = index + j; |
| if (config_offset > pdata->config_length) { |
| dev_err(dev, "Not enough config data!\n"); |
| return -EINVAL; |
| } |
| mxt_write_object(data, object->type, j, |
| pdata->config[config_offset]); |
| } |
| index += (object->size + 1) * (object->instances + 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 void mxt_handle_pdata(struct mxt_data *data) |
| { |
| const struct mxt_platform_data *pdata = data->pdata; |
| u8 voltage; |
| |
| /* Set touchscreen lines */ |
| mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_XSIZE, |
| pdata->x_line); |
| mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_YSIZE, |
| pdata->y_line); |
| |
| /* Set touchscreen orient */ |
| mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_ORIENT, |
| pdata->orient); |
| |
| /* Set touchscreen burst length */ |
| mxt_write_object(data, MXT_TOUCH_MULTI_T9, |
| MXT_TOUCH_BLEN, pdata->blen); |
| |
| /* Set touchscreen threshold */ |
| mxt_write_object(data, MXT_TOUCH_MULTI_T9, |
| MXT_TOUCH_TCHTHR, pdata->threshold); |
| |
| /* Set touchscreen resolution */ |
| mxt_write_object(data, MXT_TOUCH_MULTI_T9, |
| MXT_TOUCH_XRANGE_LSB, (pdata->x_size - 1) & 0xff); |
| mxt_write_object(data, MXT_TOUCH_MULTI_T9, |
| MXT_TOUCH_XRANGE_MSB, (pdata->x_size - 1) >> 8); |
| mxt_write_object(data, MXT_TOUCH_MULTI_T9, |
| MXT_TOUCH_YRANGE_LSB, (pdata->y_size - 1) & 0xff); |
| mxt_write_object(data, MXT_TOUCH_MULTI_T9, |
| MXT_TOUCH_YRANGE_MSB, (pdata->y_size - 1) >> 8); |
| |
| /* Set touchscreen voltage */ |
| if (pdata->voltage) { |
| if (pdata->voltage < MXT_VOLTAGE_DEFAULT) { |
| voltage = (MXT_VOLTAGE_DEFAULT - pdata->voltage) / |
| MXT_VOLTAGE_STEP; |
| voltage = 0xff - voltage + 1; |
| } else |
| voltage = (pdata->voltage - MXT_VOLTAGE_DEFAULT) / |
| MXT_VOLTAGE_STEP; |
| |
| mxt_write_object(data, MXT_SPT_CTECONFIG_T28, |
| MXT_CTE_VOLTAGE, voltage); |
| } |
| } |
| |
| 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]; |
| |
| 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; |
| } |
| } |
| |
| 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) |
| return error; |
| |
| 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) |
| return error; |
| |
| /* Check register init values */ |
| error = mxt_check_reg_init(data); |
| if (error) |
| return error; |
| |
| mxt_handle_pdata(data); |
| |
| /* Backup to memory */ |
| mxt_write_object(data, MXT_GEN_COMMAND_T6, |
| MXT_COMMAND_BACKUPNV, |
| MXT_BACKUP_VALUE); |
| msleep(MXT_BACKUP_TIME); |
| |
| /* Soft reset */ |
| mxt_write_object(data, MXT_GEN_COMMAND_T6, |
| MXT_COMMAND_RESET, 1); |
| msleep(MXT_RESET_TIME); |
| |
| /* Update matrix size at info struct */ |
| error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, &val); |
| if (error) |
| return error; |
| info->matrix_xsize = val; |
| |
| error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, &val); |
| if (error) |
| return error; |
| info->matrix_ysize = val; |
| |
| dev_info(&client->dev, |
| "Family ID: %d Variant ID: %d Version: %d Build: %d\n", |
| info->family_id, info->variant_id, info->version, |
| info->build); |
| |
| dev_info(&client->dev, |
| "Matrix X Size: %d Matrix Y Size: %d Object Num: %d\n", |
| info->matrix_xsize, info->matrix_ysize, |
| info->object_num); |
| |
| return 0; |
| } |
| |
| static void mxt_calc_resolution(struct mxt_data *data) |
| { |
| unsigned int max_x = data->pdata->x_size - 1; |
| unsigned int max_y = data->pdata->y_size - 1; |
| |
| if (data->pdata->orient & MXT_XY_SWITCH) { |
| data->max_x = max_y; |
| data->max_y = max_x; |
| } else { |
| data->max_x = max_x; |
| data->max_y = max_y; |
| } |
| } |
| |
| 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 += sprintf(buf + count, |
| "Object Table Element %d(Type %d)\n", |
| i + 1, object->type); |
| |
| if (!mxt_object_readable(object->type)) { |
| count += sprintf(buf + count, "\n"); |
| continue; |
| } |
| |
| for (j = 0; j < object->size + 1; j++) { |
| error = mxt_read_object(data, |
| object->type, j, &val); |
| if (error) |
| return error; |
| |
| count += sprintf(buf + count, |
| " Byte %d: 0x%x (%d)\n", j, val, val); |
| } |
| |
| count += sprintf(buf + count, "\n"); |
| } |
| |
| return count; |
| } |
| |
| 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 pos = 0; |
| int ret; |
| |
| ret = request_firmware(&fw, fn, dev); |
| if (ret) { |
| dev_err(dev, "Unable to open firmware %s\n", fn); |
| return ret; |
| } |
| |
| /* Change to the bootloader mode */ |
| mxt_write_object(data, MXT_GEN_COMMAND_T6, |
| MXT_COMMAND_RESET, MXT_BOOT_VALUE); |
| msleep(MXT_RESET_TIME); |
| |
| /* Change to slave address of bootloader */ |
| if (client->addr == MXT_APP_LOW) |
| client->addr = MXT_BOOT_LOW; |
| else |
| client->addr = MXT_BOOT_HIGH; |
| |
| ret = mxt_check_bootloader(client, MXT_WAITING_BOOTLOAD_CMD); |
| if (ret) |
| goto out; |
| |
| /* Unlock bootloader */ |
| mxt_unlock_bootloader(client); |
| |
| while (pos < fw->size) { |
| ret = mxt_check_bootloader(client, |
| MXT_WAITING_FRAME_DATA); |
| if (ret) |
| goto out; |
| |
| frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1)); |
| |
| /* We should add 2 at frame size as the the firmware data is not |
| * included the CRC bytes. |
| */ |
| frame_size += 2; |
| |
| /* Write one frame to device */ |
| mxt_fw_write(client, fw->data + pos, frame_size); |
| |
| ret = mxt_check_bootloader(client, |
| MXT_FRAME_CRC_PASS); |
| if (ret) |
| goto out; |
| |
| pos += frame_size; |
| |
| dev_dbg(dev, "Updated %d bytes / %zd bytes\n", pos, fw->size); |
| } |
| |
| out: |
| release_firmware(fw); |
| |
| /* Change to slave address of application */ |
| if (client->addr == MXT_BOOT_LOW) |
| client->addr = MXT_APP_LOW; |
| else |
| client->addr = MXT_APP_HIGH; |
| |
| return ret; |
| } |
| |
| static ssize_t mxt_update_fw_store(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct mxt_data *data = dev_get_drvdata(dev); |
| int error; |
| |
| disable_irq(data->irq); |
| |
| error = mxt_load_fw(dev, MXT_FW_NAME); |
| if (error) { |
| dev_err(dev, "The firmware update failed(%d)\n", error); |
| count = error; |
| } else { |
| dev_dbg(dev, "The firmware update succeeded\n"); |
| |
| /* Wait for reset */ |
| msleep(MXT_FWRESET_TIME); |
| |
| kfree(data->object_table); |
| data->object_table = NULL; |
| |
| mxt_initialize(data); |
| } |
| |
| enable_irq(data->irq); |
| |
| error = mxt_make_highchg(data); |
| if (error) |
| return error; |
| |
| return count; |
| } |
| |
| static DEVICE_ATTR(object, 0444, mxt_object_show, NULL); |
| static DEVICE_ATTR(update_fw, 0664, NULL, mxt_update_fw_store); |
| |
| static struct attribute *mxt_attrs[] = { |
| &dev_attr_object.attr, |
| &dev_attr_update_fw.attr, |
| NULL |
| }; |
| |
| static const struct attribute_group mxt_attr_group = { |
| .attrs = mxt_attrs, |
| }; |
| |
| static void mxt_start(struct mxt_data *data) |
| { |
| /* Touch enable */ |
| mxt_write_object(data, |
| MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0x83); |
| } |
| |
| static void mxt_stop(struct mxt_data *data) |
| { |
| /* Touch disable */ |
| mxt_write_object(data, |
| MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0); |
| } |
| |
| static int mxt_input_open(struct input_dev *dev) |
| { |
| struct mxt_data *data = input_get_drvdata(dev); |
| |
| mxt_start(data); |
| |
| return 0; |
| } |
| |
| static void mxt_input_close(struct input_dev *dev) |
| { |
| struct mxt_data *data = input_get_drvdata(dev); |
| |
| mxt_stop(data); |
| } |
| |
| static int __devinit mxt_probe(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| const struct mxt_platform_data *pdata = client->dev.platform_data; |
| struct mxt_data *data; |
| struct input_dev *input_dev; |
| int error; |
| |
| 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; |
| } |
| |
| input_dev->name = "Atmel maXTouch Touchscreen"; |
| 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->irq = client->irq; |
| |
| mxt_calc_resolution(data); |
| |
| __set_bit(EV_ABS, input_dev->evbit); |
| __set_bit(EV_KEY, input_dev->evbit); |
| __set_bit(BTN_TOUCH, input_dev->keybit); |
| |
| /* 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); |
| |
| /* 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, |
| 0, data->max_x, 0, 0); |
| input_set_abs_params(input_dev, ABS_MT_POSITION_Y, |
| 0, data->max_y, 0, 0); |
| |
| input_set_drvdata(input_dev, data); |
| i2c_set_clientdata(client, data); |
| |
| error = mxt_initialize(data); |
| if (error) |
| goto err_free_object; |
| |
| 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; |
| } |
| |
| error = mxt_make_highchg(data); |
| if (error) |
| 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; |
| |
| 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_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); |
| kfree(data->object_table); |
| kfree(data); |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_PM |
| static int mxt_suspend(struct device *dev) |
| { |
| struct i2c_client *client = to_i2c_client(dev); |
| struct mxt_data *data = i2c_get_clientdata(client); |
| struct input_dev *input_dev = data->input_dev; |
| |
| mutex_lock(&input_dev->mutex); |
| |
| if (input_dev->users) |
| mxt_stop(data); |
| |
| mutex_unlock(&input_dev->mutex); |
| |
| return 0; |
| } |
| |
| static int mxt_resume(struct device *dev) |
| { |
| struct i2c_client *client = to_i2c_client(dev); |
| struct mxt_data *data = i2c_get_clientdata(client); |
| struct input_dev *input_dev = data->input_dev; |
| |
| /* Soft reset */ |
| mxt_write_object(data, MXT_GEN_COMMAND_T6, |
| MXT_COMMAND_RESET, 1); |
| |
| msleep(MXT_RESET_TIME); |
| |
| mutex_lock(&input_dev->mutex); |
| |
| if (input_dev->users) |
| mxt_start(data); |
| |
| mutex_unlock(&input_dev->mutex); |
| |
| return 0; |
| } |
| |
| static const struct dev_pm_ops mxt_pm_ops = { |
| .suspend = mxt_suspend, |
| .resume = mxt_resume, |
| }; |
| #endif |
| |
| static const struct i2c_device_id mxt_id[] = { |
| { "qt602240_ts", 0 }, |
| { "atmel_mxt_ts", 0 }, |
| { "mXT224", 0 }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(i2c, mxt_id); |
| |
| static struct i2c_driver mxt_driver = { |
| .driver = { |
| .name = "atmel_mxt_ts", |
| .owner = THIS_MODULE, |
| #ifdef CONFIG_PM |
| .pm = &mxt_pm_ops, |
| #endif |
| }, |
| .probe = mxt_probe, |
| .remove = __devexit_p(mxt_remove), |
| .id_table = mxt_id, |
| }; |
| |
| static int __init mxt_init(void) |
| { |
| return i2c_add_driver(&mxt_driver); |
| } |
| |
| static void __exit mxt_exit(void) |
| { |
| i2c_del_driver(&mxt_driver); |
| } |
| |
| module_init(mxt_init); |
| module_exit(mxt_exit); |
| |
| /* Module information */ |
| MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); |
| MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver"); |
| MODULE_LICENSE("GPL"); |