// SPDX-License-Identifier: GPL-2.0-only /* * Elan Microelectronics touch panels with I2C interface * * Copyright (C) 2014 Elan Microelectronics Corporation. * Scott Liu <scott.liu@emc.com.tw> * * This code is partly based on hid-multitouch.c: * * Copyright (c) 2010-2012 Stephane Chatty <chatty@enac.fr> * Copyright (c) 2010-2012 Benjamin Tissoires <benjamin.tissoires@gmail.com> * Copyright (c) 2010-2012 Ecole Nationale de l'Aviation Civile, France * * This code is partly based on i2c-hid.c: * * Copyright (c) 2012 Benjamin Tissoires <benjamin.tissoires@gmail.com> * Copyright (c) 2012 Ecole Nationale de l'Aviation Civile, France * Copyright (c) 2012 Red Hat, Inc */ #include <linux/bits.h> #include <linux/module.h> #include <linux/input.h> #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/platform_device.h> #include <linux/async.h> #include <linux/i2c.h> #include <linux/delay.h> #include <linux/uaccess.h> #include <linux/buffer_head.h> #include <linux/slab.h> #include <linux/firmware.h> #include <linux/input/mt.h> #include <linux/input/touchscreen.h> #include <linux/acpi.h> #include <linux/of.h> #include <linux/gpio/consumer.h> #include <linux/regulator/consumer.h> #include <linux/uuid.h> #include <asm/unaligned.h> /* Device, Driver information */ #define DEVICE_NAME "elants_i2c" /* Convert from rows or columns into resolution */ #define ELAN_TS_RESOLUTION(n, m) (((n) - 1) * (m)) /* FW header data */ #define HEADER_SIZE 4 #define FW_HDR_TYPE 0 #define FW_HDR_COUNT 1 #define FW_HDR_LENGTH 2 /* Buffer mode Queue Header information */ #define QUEUE_HEADER_SINGLE 0x62 #define QUEUE_HEADER_NORMAL 0X63 #define QUEUE_HEADER_WAIT 0x64 /* Command header definition */ #define CMD_HEADER_WRITE 0x54 #define CMD_HEADER_READ 0x53 #define CMD_HEADER_6B_READ 0x5B #define CMD_HEADER_ROM_READ 0x96 #define CMD_HEADER_RESP 0x52 #define CMD_HEADER_6B_RESP 0x9B #define CMD_HEADER_ROM_RESP 0x95 #define CMD_HEADER_HELLO 0x55 #define CMD_HEADER_REK 0x66 /* FW position data */ #define PACKET_SIZE 55 #define MAX_CONTACT_NUM 10 #define FW_POS_HEADER 0 #define FW_POS_STATE 1 #define FW_POS_TOTAL 2 #define FW_POS_XY 3 #define FW_POS_TOOL_TYPE 33 #define FW_POS_CHECKSUM 34 #define FW_POS_WIDTH 35 #define FW_POS_PRESSURE 45 #define HEADER_REPORT_10_FINGER 0x62 /* Header (4 bytes) plus 3 fill 10-finger packets */ #define MAX_PACKET_SIZE 169 #define BOOT_TIME_DELAY_MS 50 /* FW read command, 0x53 0x?? 0x0, 0x01 */ #define E_ELAN_INFO_FW_VER 0x00 #define E_ELAN_INFO_BC_VER 0x10 #define E_ELAN_INFO_REK 0xD0 #define E_ELAN_INFO_TEST_VER 0xE0 #define E_ELAN_INFO_FW_ID 0xF0 #define E_INFO_OSR 0xD6 #define E_INFO_PHY_SCAN 0xD7 #define E_INFO_PHY_DRIVER 0xD8 #define MAX_RETRIES 3 #define MAX_FW_UPDATE_RETRIES 30 #define ELAN_FW_PAGESIZE 132 /* calibration timeout definition */ #define ELAN_CALI_TIMEOUT_MSEC 12000 #define ELAN_POWERON_DELAY_USEC 500 #define ELAN_RESET_DELAY_MSEC 20 /* FW boot code version */ #define BC_VER_H_BYTE_FOR_EKTH3900x1_I2C 0x72 #define BC_VER_H_BYTE_FOR_EKTH3900x2_I2C 0x82 #define BC_VER_H_BYTE_FOR_EKTH3900x3_I2C 0x92 #define BC_VER_H_BYTE_FOR_EKTH5312x1_I2C 0x6D #define BC_VER_H_BYTE_FOR_EKTH5312x2_I2C 0x6E #define BC_VER_H_BYTE_FOR_EKTH5312cx1_I2C 0x77 #define BC_VER_H_BYTE_FOR_EKTH5312cx2_I2C 0x78 #define BC_VER_H_BYTE_FOR_EKTH5312x1_I2C_USB 0x67 #define BC_VER_H_BYTE_FOR_EKTH5312x2_I2C_USB 0x68 #define BC_VER_H_BYTE_FOR_EKTH5312cx1_I2C_USB 0x74 #define BC_VER_H_BYTE_FOR_EKTH5312cx2_I2C_USB 0x75 enum elants_state { <------>ELAN_STATE_NORMAL, <------>ELAN_WAIT_QUEUE_HEADER, <------>ELAN_WAIT_RECALIBRATION, }; enum elants_iap_mode { <------>ELAN_IAP_OPERATIONAL, <------>ELAN_IAP_RECOVERY, }; /* struct elants_data - represents state of Elan touchscreen device */ struct elants_data { <------>struct i2c_client *client; <------>struct input_dev *input; <------>struct regulator *vcc33; <------>struct regulator *vccio; <------>struct gpio_desc *reset_gpio; <------>u16 fw_version; <------>u8 test_version; <------>u8 solution_version; <------>u8 bc_version; <------>u8 iap_version; <------>u16 hw_version; <------>u8 major_res; <------>unsigned int x_res; /* resolution in units/mm */ <------>unsigned int y_res; <------>unsigned int x_max; <------>unsigned int y_max; <------>struct touchscreen_properties prop; <------>enum elants_state state; <------>enum elants_iap_mode iap_mode; <------>/* Guards against concurrent access to the device via sysfs */ <------>struct mutex sysfs_mutex; <------>u8 cmd_resp[HEADER_SIZE]; <------>struct completion cmd_done; <------>bool wake_irq_enabled; <------>bool keep_power_in_suspend; <------>/* Must be last to be used for DMA operations */ <------>u8 buf[MAX_PACKET_SIZE] ____cacheline_aligned; }; static int elants_i2c_send(struct i2c_client *client, <------><------><------> const void *data, size_t size) { <------>int ret; <------>ret = i2c_master_send(client, data, size); <------>if (ret == size) <------><------>return 0; <------>if (ret >= 0) <------><------>ret = -EIO; <------>dev_err(&client->dev, "%s failed (%*ph): %d\n", <------><------>__func__, (int)size, data, ret); <------>return ret; } static int elants_i2c_read(struct i2c_client *client, void *data, size_t size) { <------>int ret; <------>ret = i2c_master_recv(client, data, size); <------>if (ret == size) <------><------>return 0; <------>if (ret >= 0) <------><------>ret = -EIO; <------>dev_err(&client->dev, "%s failed: %d\n", __func__, ret); <------>return ret; } static int elants_i2c_execute_command(struct i2c_client *client, <------><------><------><------> const u8 *cmd, size_t cmd_size, <------><------><------><------> u8 *resp, size_t resp_size, <------><------><------><------> int retries, const char *cmd_name) { <------>struct i2c_msg msgs[2]; <------>int ret; <------>u8 expected_response; <------>switch (cmd[0]) { <------>case CMD_HEADER_READ: <------><------>expected_response = CMD_HEADER_RESP; <------><------>break; <------>case CMD_HEADER_6B_READ: <------><------>expected_response = CMD_HEADER_6B_RESP; <------><------>break; <------>case CMD_HEADER_ROM_READ: <------><------>expected_response = CMD_HEADER_ROM_RESP; <------><------>break; <------>default: <------><------>dev_err(&client->dev, "(%s): invalid command: %*ph\n", <------><------><------>cmd_name, (int)cmd_size, cmd); <------><------>return -EINVAL; <------>} <------>for (;;) { <------><------>msgs[0].addr = client->addr; <------><------>msgs[0].flags = client->flags & I2C_M_TEN; <------><------>msgs[0].len = cmd_size; <------><------>msgs[0].buf = (u8 *)cmd; <------><------>msgs[1].addr = client->addr; <------><------>msgs[1].flags = (client->flags & I2C_M_TEN) | I2C_M_RD; <------><------>msgs[1].flags |= I2C_M_RD; <------><------>msgs[1].len = resp_size; <------><------>msgs[1].buf = resp; <------><------>ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); <------><------>if (ret < 0) { <------><------><------>if (--retries > 0) { <------><------><------><------>dev_dbg(&client->dev, <------><------><------><------><------>"(%s) I2C transfer failed: %pe (retrying)\n", <------><------><------><------><------>cmd_name, ERR_PTR(ret)); <------><------><------><------>continue; <------><------><------>} <------><------><------>dev_err(&client->dev, <------><------><------><------>"(%s) I2C transfer failed: %pe\n", <------><------><------><------>cmd_name, ERR_PTR(ret)); <------><------><------>return ret; <------><------>} <------><------>if (ret != ARRAY_SIZE(msgs) || <------><------> resp[FW_HDR_TYPE] != expected_response) { <------><------><------>if (--retries > 0) { <------><------><------><------>dev_dbg(&client->dev, <------><------><------><------><------>"(%s) unexpected response: %*ph (retrying)\n", <------><------><------><------><------>cmd_name, ret, resp); <------><------><------><------>continue; <------><------><------>} <------><------><------>dev_err(&client->dev, <------><------><------><------>"(%s) unexpected response: %*ph\n", <------><------><------><------>cmd_name, ret, resp); <------><------><------>return -EIO; <------><------>} <------><------>return 0; <------>} } static int elants_i2c_calibrate(struct elants_data *ts) { <------>struct i2c_client *client = ts->client; <------>int ret, error; <------>static const u8 w_flashkey[] = { 0x54, 0xC0, 0xE1, 0x5A }; <------>static const u8 rek[] = { 0x54, 0x29, 0x00, 0x01 }; <------>static const u8 rek_resp[] = { CMD_HEADER_REK, 0x66, 0x66, 0x66 }; <------>disable_irq(client->irq); <------>ts->state = ELAN_WAIT_RECALIBRATION; <------>reinit_completion(&ts->cmd_done); <------>elants_i2c_send(client, w_flashkey, sizeof(w_flashkey)); <------>elants_i2c_send(client, rek, sizeof(rek)); <------>enable_irq(client->irq); <------>ret = wait_for_completion_interruptible_timeout(&ts->cmd_done, <------><------><------><------>msecs_to_jiffies(ELAN_CALI_TIMEOUT_MSEC)); <------>ts->state = ELAN_STATE_NORMAL; <------>if (ret <= 0) { <------><------>error = ret < 0 ? ret : -ETIMEDOUT; <------><------>dev_err(&client->dev, <------><------><------>"error while waiting for calibration to complete: %d\n", <------><------><------>error); <------><------>return error; <------>} <------>if (memcmp(rek_resp, ts->cmd_resp, sizeof(rek_resp))) { <------><------>dev_err(&client->dev, <------><------><------>"unexpected calibration response: %*ph\n", <------><------><------>(int)sizeof(ts->cmd_resp), ts->cmd_resp); <------><------>return -EINVAL; <------>} <------>return 0; } static int elants_i2c_sw_reset(struct i2c_client *client) { <------>const u8 soft_rst_cmd[] = { 0x77, 0x77, 0x77, 0x77 }; <------>int error; <------>error = elants_i2c_send(client, soft_rst_cmd, <------><------><------><------>sizeof(soft_rst_cmd)); <------>if (error) { <------><------>dev_err(&client->dev, "software reset failed: %d\n", error); <------><------>return error; <------>} <------>/* <------> * We should wait at least 10 msec (but no more than 40) before <------> * sending fastboot or IAP command to the device. <------> */ <------>msleep(30); <------>return 0; } static u16 elants_i2c_parse_version(u8 *buf) { <------>return get_unaligned_be32(buf) >> 4; } static int elants_i2c_query_hw_version(struct elants_data *ts) { <------>struct i2c_client *client = ts->client; <------>int retry_cnt = MAX_RETRIES; <------>const u8 cmd[] = { CMD_HEADER_READ, E_ELAN_INFO_FW_ID, 0x00, 0x01 }; <------>u8 resp[HEADER_SIZE]; <------>int error; <------>while (retry_cnt--) { <------><------>error = elants_i2c_execute_command(client, cmd, sizeof(cmd), <------><------><------><------><------><------> resp, sizeof(resp), 1, <------><------><------><------><------><------> "read fw id"); <------><------>if (error) <------><------><------>return error; <------><------>ts->hw_version = elants_i2c_parse_version(resp); <------><------>if (ts->hw_version != 0xffff) <------><------><------>return 0; <------>} <------>dev_err(&client->dev, "Invalid fw id: %#04x\n", ts->hw_version); <------>return -EINVAL; } static int elants_i2c_query_fw_version(struct elants_data *ts) { <------>struct i2c_client *client = ts->client; <------>int retry_cnt = MAX_RETRIES; <------>const u8 cmd[] = { CMD_HEADER_READ, E_ELAN_INFO_FW_VER, 0x00, 0x01 }; <------>u8 resp[HEADER_SIZE]; <------>int error; <------>while (retry_cnt--) { <------><------>error = elants_i2c_execute_command(client, cmd, sizeof(cmd), <------><------><------><------><------><------> resp, sizeof(resp), 1, <------><------><------><------><------><------> "read fw version"); <------><------>if (error) <------><------><------>return error; <------><------>ts->fw_version = elants_i2c_parse_version(resp); <------><------>if (ts->fw_version != 0x0000 && ts->fw_version != 0xffff) <------><------><------>return 0; <------><------>dev_dbg(&client->dev, "(read fw version) resp %*phC\n", <------><------><------>(int)sizeof(resp), resp); <------>} <------>dev_err(&client->dev, "Invalid fw ver: %#04x\n", ts->fw_version); <------>return -EINVAL; } static int elants_i2c_query_test_version(struct elants_data *ts) { <------>struct i2c_client *client = ts->client; <------>int error; <------>u16 version; <------>const u8 cmd[] = { CMD_HEADER_READ, E_ELAN_INFO_TEST_VER, 0x00, 0x01 }; <------>u8 resp[HEADER_SIZE]; <------>error = elants_i2c_execute_command(client, cmd, sizeof(cmd), <------><------><------><------><------> resp, sizeof(resp), MAX_RETRIES, <------><------><------><------><------> "read test version"); <------>if (error) { <------><------>dev_err(&client->dev, "Failed to read test version\n"); <------><------>return error; <------>} <------>version = elants_i2c_parse_version(resp); <------>ts->test_version = version >> 8; <------>ts->solution_version = version & 0xff; <------>return 0; } static int elants_i2c_query_bc_version(struct elants_data *ts) { <------>struct i2c_client *client = ts->client; <------>const u8 cmd[] = { CMD_HEADER_READ, E_ELAN_INFO_BC_VER, 0x00, 0x01 }; <------>u8 resp[HEADER_SIZE]; <------>u16 version; <------>int error; <------>error = elants_i2c_execute_command(client, cmd, sizeof(cmd), <------><------><------><------><------> resp, sizeof(resp), 1, <------><------><------><------><------> "read BC version"); <------>if (error) <------><------>return error; <------>version = elants_i2c_parse_version(resp); <------>ts->bc_version = version >> 8; <------>ts->iap_version = version & 0xff; <------>return 0; } static int elants_i2c_query_ts_info(struct elants_data *ts) { <------>struct i2c_client *client = ts->client; <------>int error; <------>u8 resp[17]; <------>u16 phy_x, phy_y, rows, cols, osr; <------>const u8 get_resolution_cmd[] = { <------><------>CMD_HEADER_6B_READ, 0x00, 0x00, 0x00, 0x00, 0x00 <------>}; <------>const u8 get_osr_cmd[] = { <------><------>CMD_HEADER_READ, E_INFO_OSR, 0x00, 0x01 <------>}; <------>const u8 get_physical_scan_cmd[] = { <------><------>CMD_HEADER_READ, E_INFO_PHY_SCAN, 0x00, 0x01 <------>}; <------>const u8 get_physical_drive_cmd[] = { <------><------>CMD_HEADER_READ, E_INFO_PHY_DRIVER, 0x00, 0x01 <------>}; <------>/* Get trace number */ <------>error = elants_i2c_execute_command(client, <------><------><------><------><------> get_resolution_cmd, <------><------><------><------><------> sizeof(get_resolution_cmd), <------><------><------><------><------> resp, sizeof(resp), 1, <------><------><------><------><------> "get resolution"); <------>if (error) <------><------>return error; <------>rows = resp[2] + resp[6] + resp[10]; <------>cols = resp[3] + resp[7] + resp[11]; <------>/* Get report resolution value of ABS_MT_TOUCH_MAJOR */ <------>ts->major_res = resp[16]; <------>/* Process mm_to_pixel information */ <------>error = elants_i2c_execute_command(client, <------><------><------><------><------> get_osr_cmd, sizeof(get_osr_cmd), <------><------><------><------><------> resp, sizeof(resp), 1, "get osr"); <------>if (error) <------><------>return error; <------>osr = resp[3]; <------>error = elants_i2c_execute_command(client, <------><------><------><------><------> get_physical_scan_cmd, <------><------><------><------><------> sizeof(get_physical_scan_cmd), <------><------><------><------><------> resp, sizeof(resp), 1, <------><------><------><------><------> "get physical scan"); <------>if (error) <------><------>return error; <------>phy_x = get_unaligned_be16(&resp[2]); <------>error = elants_i2c_execute_command(client, <------><------><------><------><------> get_physical_drive_cmd, <------><------><------><------><------> sizeof(get_physical_drive_cmd), <------><------><------><------><------> resp, sizeof(resp), 1, <------><------><------><------><------> "get physical drive"); <------>if (error) <------><------>return error; <------>phy_y = get_unaligned_be16(&resp[2]); <------>dev_dbg(&client->dev, "phy_x=%d, phy_y=%d\n", phy_x, phy_y); <------>if (rows == 0 || cols == 0 || osr == 0) { <------><------>dev_warn(&client->dev, <------><------><------> "invalid trace number data: %d, %d, %d\n", <------><------><------> rows, cols, osr); <------>} else { <------><------>/* translate trace number to TS resolution */ <------><------>ts->x_max = ELAN_TS_RESOLUTION(rows, osr); <------><------>ts->x_res = DIV_ROUND_CLOSEST(ts->x_max, phy_x); <------><------>ts->y_max = ELAN_TS_RESOLUTION(cols, osr); <------><------>ts->y_res = DIV_ROUND_CLOSEST(ts->y_max, phy_y); <------>} <------>return 0; } static int elants_i2c_fastboot(struct i2c_client *client) { <------>const u8 boot_cmd[] = { 0x4D, 0x61, 0x69, 0x6E }; <------>int error; <------>error = elants_i2c_send(client, boot_cmd, sizeof(boot_cmd)); <------>if (error) { <------><------>dev_err(&client->dev, "boot failed: %d\n", error); <------><------>return error; <------>} <------>dev_dbg(&client->dev, "boot success -- 0x%x\n", client->addr); <------>return 0; } static int elants_i2c_initialize(struct elants_data *ts) { <------>struct i2c_client *client = ts->client; <------>int error, error2, retry_cnt; <------>const u8 hello_packet[] = { 0x55, 0x55, 0x55, 0x55 }; <------>const u8 recov_packet[] = { 0x55, 0x55, 0x80, 0x80 }; <------>u8 buf[HEADER_SIZE]; <------>for (retry_cnt = 0; retry_cnt < MAX_RETRIES; retry_cnt++) { <------><------>error = elants_i2c_sw_reset(client); <------><------>if (error) { <------><------><------>/* Continue initializing if it's the last try */ <------><------><------>if (retry_cnt < MAX_RETRIES - 1) <------><------><------><------>continue; <------><------>} <------><------>error = elants_i2c_fastboot(client); <------><------>if (error) { <------><------><------>/* Continue initializing if it's the last try */ <------><------><------>if (retry_cnt < MAX_RETRIES - 1) <------><------><------><------>continue; <------><------>} <------><------>/* Wait for Hello packet */ <------><------>msleep(BOOT_TIME_DELAY_MS); <------><------>error = elants_i2c_read(client, buf, sizeof(buf)); <------><------>if (error) { <------><------><------>dev_err(&client->dev, <------><------><------><------>"failed to read 'hello' packet: %d\n", error); <------><------>} else if (!memcmp(buf, hello_packet, sizeof(hello_packet))) { <------><------><------>ts->iap_mode = ELAN_IAP_OPERATIONAL; <------><------><------>break; <------><------>} else if (!memcmp(buf, recov_packet, sizeof(recov_packet))) { <------><------><------>/* <------><------><------> * Setting error code will mark device <------><------><------> * in recovery mode below. <------><------><------> */ <------><------><------>error = -EIO; <------><------><------>break; <------><------>} else { <------><------><------>error = -EINVAL; <------><------><------>dev_err(&client->dev, <------><------><------><------>"invalid 'hello' packet: %*ph\n", <------><------><------><------>(int)sizeof(buf), buf); <------><------>} <------>} <------>/* hw version is available even if device in recovery state */ <------>error2 = elants_i2c_query_hw_version(ts); <------>if (!error2) <------><------>error2 = elants_i2c_query_bc_version(ts); <------>if (!error) <------><------>error = error2; <------>if (!error) <------><------>error = elants_i2c_query_fw_version(ts); <------>if (!error) <------><------>error = elants_i2c_query_test_version(ts); <------>if (!error) <------><------>error = elants_i2c_query_ts_info(ts); <------>if (error) <------><------>ts->iap_mode = ELAN_IAP_RECOVERY; <------>return 0; } /* * Firmware update interface. */ static int elants_i2c_fw_write_page(struct i2c_client *client, <------><------><------><------> const void *page) { <------>const u8 ack_ok[] = { 0xaa, 0xaa }; <------>u8 buf[2]; <------>int retry; <------>int error; <------>for (retry = 0; retry < MAX_FW_UPDATE_RETRIES; retry++) { <------><------>error = elants_i2c_send(client, page, ELAN_FW_PAGESIZE); <------><------>if (error) { <------><------><------>dev_err(&client->dev, <------><------><------><------>"IAP Write Page failed: %d\n", error); <------><------><------>continue; <------><------>} <------><------>error = elants_i2c_read(client, buf, 2); <------><------>if (error) { <------><------><------>dev_err(&client->dev, <------><------><------><------>"IAP Ack read failed: %d\n", error); <------><------><------>return error; <------><------>} <------><------>if (!memcmp(buf, ack_ok, sizeof(ack_ok))) <------><------><------>return 0; <------><------>error = -EIO; <------><------>dev_err(&client->dev, <------><------><------>"IAP Get Ack Error [%02x:%02x]\n", <------><------><------>buf[0], buf[1]); <------>} <------>return error; } static int elants_i2c_validate_remark_id(struct elants_data *ts, <------><------><------><------><------> const struct firmware *fw) { <------>struct i2c_client *client = ts->client; <------>int error; <------>const u8 cmd[] = { CMD_HEADER_ROM_READ, 0x80, 0x1F, 0x00, 0x00, 0x21 }; <------>u8 resp[6] = { 0 }; <------>u16 ts_remark_id = 0; <------>u16 fw_remark_id = 0; <------>/* Compare TS Remark ID and FW Remark ID */ <------>error = elants_i2c_execute_command(client, cmd, sizeof(cmd), <------><------><------><------><------> resp, sizeof(resp), <------><------><------><------><------> 1, "read Remark ID"); <------>if (error) <------><------>return error; <------>ts_remark_id = get_unaligned_be16(&resp[3]); <------>fw_remark_id = get_unaligned_le16(&fw->data[fw->size - 4]); <------>if (fw_remark_id != ts_remark_id) { <------><------>dev_err(&client->dev, <------><------><------>"Remark ID Mismatched: ts_remark_id=0x%04x, fw_remark_id=0x%04x.\n", <------><------><------>ts_remark_id, fw_remark_id); <------><------>return -EINVAL; <------>} <------>return 0; } static bool elants_i2c_should_check_remark_id(struct elants_data *ts) { <------>struct i2c_client *client = ts->client; <------>const u8 bootcode_version = ts->iap_version; <------>bool check; <------>/* I2C eKTH3900 and eKTH5312 are NOT support Remark ID */ <------>if ((bootcode_version == BC_VER_H_BYTE_FOR_EKTH3900x1_I2C) || <------> (bootcode_version == BC_VER_H_BYTE_FOR_EKTH3900x2_I2C) || <------> (bootcode_version == BC_VER_H_BYTE_FOR_EKTH3900x3_I2C) || <------> (bootcode_version == BC_VER_H_BYTE_FOR_EKTH5312x1_I2C) || <------> (bootcode_version == BC_VER_H_BYTE_FOR_EKTH5312x2_I2C) || <------> (bootcode_version == BC_VER_H_BYTE_FOR_EKTH5312cx1_I2C) || <------> (bootcode_version == BC_VER_H_BYTE_FOR_EKTH5312cx2_I2C) || <------> (bootcode_version == BC_VER_H_BYTE_FOR_EKTH5312x1_I2C_USB) || <------> (bootcode_version == BC_VER_H_BYTE_FOR_EKTH5312x2_I2C_USB) || <------> (bootcode_version == BC_VER_H_BYTE_FOR_EKTH5312cx1_I2C_USB) || <------> (bootcode_version == BC_VER_H_BYTE_FOR_EKTH5312cx2_I2C_USB)) { <------><------>dev_dbg(&client->dev, <------><------><------>"eKTH3900/eKTH5312(0x%02x) are not support remark id\n", <------><------><------>bootcode_version); <------><------>check = false; <------>} else if (bootcode_version >= 0x60) { <------><------>check = true; <------>} else { <------><------>check = false; <------>} <------>return check; } static int elants_i2c_do_update_firmware(struct i2c_client *client, <------><------><------><------><------> const struct firmware *fw, <------><------><------><------><------> bool force) { <------>struct elants_data *ts = i2c_get_clientdata(client); <------>const u8 enter_iap[] = { 0x45, 0x49, 0x41, 0x50 }; <------>const u8 enter_iap2[] = { 0x54, 0x00, 0x12, 0x34 }; <------>const u8 iap_ack[] = { 0x55, 0xaa, 0x33, 0xcc }; <------>const u8 close_idle[] = { 0x54, 0x2c, 0x01, 0x01 }; <------>u8 buf[HEADER_SIZE]; <------>u16 send_id; <------>int page, n_fw_pages; <------>int error; <------>bool check_remark_id = elants_i2c_should_check_remark_id(ts); <------>/* Recovery mode detection! */ <------>if (force) { <------><------>dev_dbg(&client->dev, "Recovery mode procedure\n"); <------><------>if (check_remark_id) { <------><------><------>error = elants_i2c_validate_remark_id(ts, fw); <------><------><------>if (error) <------><------><------><------>return error; <------><------>} <------><------>error = elants_i2c_send(client, enter_iap2, sizeof(enter_iap2)); <------><------>if (error) { <------><------><------>dev_err(&client->dev, "failed to enter IAP mode: %d\n", <------><------><------><------>error); <------><------><------>return error; <------><------>} <------>} else { <------><------>/* Start IAP Procedure */ <------><------>dev_dbg(&client->dev, "Normal IAP procedure\n"); <------><------>/* Close idle mode */ <------><------>error = elants_i2c_send(client, close_idle, sizeof(close_idle)); <------><------>if (error) <------><------><------>dev_err(&client->dev, "Failed close idle: %d\n", error); <------><------>msleep(60); <------><------>elants_i2c_sw_reset(client); <------><------>msleep(20); <------><------>if (check_remark_id) { <------><------><------>error = elants_i2c_validate_remark_id(ts, fw); <------><------><------>if (error) <------><------><------><------>return error; <------><------>} <------><------>error = elants_i2c_send(client, enter_iap, sizeof(enter_iap)); <------><------>if (error) { <------><------><------>dev_err(&client->dev, "failed to enter IAP mode: %d\n", <------><------><------><------>error); <------><------><------>return error; <------><------>} <------>} <------>msleep(20); <------>/* check IAP state */ <------>error = elants_i2c_read(client, buf, 4); <------>if (error) { <------><------>dev_err(&client->dev, <------><------><------>"failed to read IAP acknowledgement: %d\n", <------><------><------>error); <------><------>return error; <------>} <------>if (memcmp(buf, iap_ack, sizeof(iap_ack))) { <------><------>dev_err(&client->dev, <------><------><------>"failed to enter IAP: %*ph (expected %*ph)\n", <------><------><------>(int)sizeof(buf), buf, (int)sizeof(iap_ack), iap_ack); <------><------>return -EIO; <------>} <------>dev_info(&client->dev, "successfully entered IAP mode"); <------>send_id = client->addr; <------>error = elants_i2c_send(client, &send_id, 1); <------>if (error) { <------><------>dev_err(&client->dev, "sending dummy byte failed: %d\n", <------><------><------>error); <------><------>return error; <------>} <------>/* Clear the last page of Master */ <------>error = elants_i2c_send(client, fw->data, ELAN_FW_PAGESIZE); <------>if (error) { <------><------>dev_err(&client->dev, "clearing of the last page failed: %d\n", <------><------><------>error); <------><------>return error; <------>} <------>error = elants_i2c_read(client, buf, 2); <------>if (error) { <------><------>dev_err(&client->dev, <------><------><------>"failed to read ACK for clearing the last page: %d\n", <------><------><------>error); <------><------>return error; <------>} <------>n_fw_pages = fw->size / ELAN_FW_PAGESIZE; <------>dev_dbg(&client->dev, "IAP Pages = %d\n", n_fw_pages); <------>for (page = 0; page < n_fw_pages; page++) { <------><------>error = elants_i2c_fw_write_page(client, <------><------><------><------><------>fw->data + page * ELAN_FW_PAGESIZE); <------><------>if (error) { <------><------><------>dev_err(&client->dev, <------><------><------><------>"failed to write FW page %d: %d\n", <------><------><------><------>page, error); <------><------><------>return error; <------><------>} <------>} <------>/* Old iap needs to wait 200ms for WDT and rest is for hello packets */ <------>msleep(300); <------>dev_info(&client->dev, "firmware update completed\n"); <------>return 0; } static int elants_i2c_fw_update(struct elants_data *ts) { <------>struct i2c_client *client = ts->client; <------>const struct firmware *fw; <------>char *fw_name; <------>int error; <------>fw_name = kasprintf(GFP_KERNEL, "elants_i2c_%04x.bin", ts->hw_version); <------>if (!fw_name) <------><------>return -ENOMEM; <------>dev_info(&client->dev, "requesting fw name = %s\n", fw_name); <------>error = request_firmware(&fw, fw_name, &client->dev); <------>kfree(fw_name); <------>if (error) { <------><------>dev_err(&client->dev, "failed to request firmware: %d\n", <------><------><------>error); <------><------>return error; <------>} <------>if (fw->size % ELAN_FW_PAGESIZE) { <------><------>dev_err(&client->dev, "invalid firmware length: %zu\n", <------><------><------>fw->size); <------><------>error = -EINVAL; <------><------>goto out; <------>} <------>disable_irq(client->irq); <------>error = elants_i2c_do_update_firmware(client, fw, <------><------><------><------><------>ts->iap_mode == ELAN_IAP_RECOVERY); <------>if (error) { <------><------>dev_err(&client->dev, "firmware update failed: %d\n", error); <------><------>ts->iap_mode = ELAN_IAP_RECOVERY; <------><------>goto out_enable_irq; <------>} <------>error = elants_i2c_initialize(ts); <------>if (error) { <------><------>dev_err(&client->dev, <------><------><------>"failed to initialize device after firmware update: %d\n", <------><------><------>error); <------><------>ts->iap_mode = ELAN_IAP_RECOVERY; <------><------>goto out_enable_irq; <------>} <------>ts->iap_mode = ELAN_IAP_OPERATIONAL; out_enable_irq: <------>ts->state = ELAN_STATE_NORMAL; <------>enable_irq(client->irq); <------>msleep(100); <------>if (!error) <------><------>elants_i2c_calibrate(ts); out: <------>release_firmware(fw); <------>return error; } /* * Event reporting. */ static void elants_i2c_mt_event(struct elants_data *ts, u8 *buf) { <------>struct input_dev *input = ts->input; <------>unsigned int n_fingers; <------>unsigned int tool_type; <------>u16 finger_state; <------>int i; <------>n_fingers = buf[FW_POS_STATE + 1] & 0x0f; <------>finger_state = ((buf[FW_POS_STATE + 1] & 0x30) << 4) | <------><------><------>buf[FW_POS_STATE]; <------>dev_dbg(&ts->client->dev, <------><------>"n_fingers: %u, state: %04x\n", n_fingers, finger_state); <------>/* Note: all fingers have the same tool type */ <------>tool_type = buf[FW_POS_TOOL_TYPE] & BIT(0) ? <------><------><------>MT_TOOL_FINGER : MT_TOOL_PALM; <------>for (i = 0; i < MAX_CONTACT_NUM && n_fingers; i++) { <------><------>if (finger_state & 1) { <------><------><------>unsigned int x, y, p, w; <------><------><------>u8 *pos; <------><------><------>pos = &buf[FW_POS_XY + i * 3]; <------><------><------>x = (((u16)pos[0] & 0xf0) << 4) | pos[1]; <------><------><------>y = (((u16)pos[0] & 0x0f) << 8) | pos[2]; <------><------><------>p = buf[FW_POS_PRESSURE + i]; <------><------><------>w = buf[FW_POS_WIDTH + i]; <------><------><------>dev_dbg(&ts->client->dev, "i=%d x=%d y=%d p=%d w=%d\n", <------><------><------><------>i, x, y, p, w); <------><------><------>input_mt_slot(input, i); <------><------><------>input_mt_report_slot_state(input, tool_type, true); <------><------><------>touchscreen_report_pos(input, &ts->prop, x, y, true); <------><------><------>input_event(input, EV_ABS, ABS_MT_PRESSURE, p); <------><------><------>input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, w); <------><------><------>n_fingers--; <------><------>} <------><------>finger_state >>= 1; <------>} <------>input_mt_sync_frame(input); <------>input_sync(input); } static u8 elants_i2c_calculate_checksum(u8 *buf) { <------>u8 checksum = 0; <------>u8 i; <------>for (i = 0; i < FW_POS_CHECKSUM; i++) <------><------>checksum += buf[i]; <------>return checksum; } static void elants_i2c_event(struct elants_data *ts, u8 *buf) { <------>u8 checksum = elants_i2c_calculate_checksum(buf); <------>if (unlikely(buf[FW_POS_CHECKSUM] != checksum)) <------><------>dev_warn(&ts->client->dev, <------><------><------> "%s: invalid checksum for packet %02x: %02x vs. %02x\n", <------><------><------> __func__, buf[FW_POS_HEADER], <------><------><------> checksum, buf[FW_POS_CHECKSUM]); <------>else if (unlikely(buf[FW_POS_HEADER] != HEADER_REPORT_10_FINGER)) <------><------>dev_warn(&ts->client->dev, <------><------><------> "%s: unknown packet type: %02x\n", <------><------><------> __func__, buf[FW_POS_HEADER]); <------>else <------><------>elants_i2c_mt_event(ts, buf); } static irqreturn_t elants_i2c_irq(int irq, void *_dev) { <------>const u8 wait_packet[] = { 0x64, 0x64, 0x64, 0x64 }; <------>struct elants_data *ts = _dev; <------>struct i2c_client *client = ts->client; <------>int report_count, report_len; <------>int i; <------>int len; <------>len = i2c_master_recv_dmasafe(client, ts->buf, sizeof(ts->buf)); <------>if (len < 0) { <------><------>dev_err(&client->dev, "%s: failed to read data: %d\n", <------><------><------>__func__, len); <------><------>goto out; <------>} <------>dev_dbg(&client->dev, "%s: packet %*ph\n", <------><------>__func__, HEADER_SIZE, ts->buf); <------>switch (ts->state) { <------>case ELAN_WAIT_RECALIBRATION: <------><------>if (ts->buf[FW_HDR_TYPE] == CMD_HEADER_REK) { <------><------><------>memcpy(ts->cmd_resp, ts->buf, sizeof(ts->cmd_resp)); <------><------><------>complete(&ts->cmd_done); <------><------><------>ts->state = ELAN_STATE_NORMAL; <------><------>} <------><------>break; <------>case ELAN_WAIT_QUEUE_HEADER: <------><------>if (ts->buf[FW_HDR_TYPE] != QUEUE_HEADER_NORMAL) <------><------><------>break; <------><------>ts->state = ELAN_STATE_NORMAL; <------><------>fallthrough; <------>case ELAN_STATE_NORMAL: <------><------>switch (ts->buf[FW_HDR_TYPE]) { <------><------>case CMD_HEADER_HELLO: <------><------>case CMD_HEADER_RESP: <------><------>case CMD_HEADER_REK: <------><------><------>break; <------><------>case QUEUE_HEADER_WAIT: <------><------><------>if (memcmp(ts->buf, wait_packet, sizeof(wait_packet))) { <------><------><------><------>dev_err(&client->dev, <------><------><------><------><------>"invalid wait packet %*ph\n", <------><------><------><------><------>HEADER_SIZE, ts->buf); <------><------><------>} else { <------><------><------><------>ts->state = ELAN_WAIT_QUEUE_HEADER; <------><------><------><------>udelay(30); <------><------><------>} <------><------><------>break; <------><------>case QUEUE_HEADER_SINGLE: <------><------><------>elants_i2c_event(ts, &ts->buf[HEADER_SIZE]); <------><------><------>break; <------><------>case QUEUE_HEADER_NORMAL: <------><------><------>report_count = ts->buf[FW_HDR_COUNT]; <------><------><------>if (report_count == 0 || report_count > 3) { <------><------><------><------>dev_err(&client->dev, <------><------><------><------><------>"bad report count: %*ph\n", <------><------><------><------><------>HEADER_SIZE, ts->buf); <------><------><------><------>break; <------><------><------>} <------><------><------>report_len = ts->buf[FW_HDR_LENGTH] / report_count; <------><------><------>if (report_len != PACKET_SIZE) { <------><------><------><------>dev_err(&client->dev, <------><------><------><------><------>"mismatching report length: %*ph\n", <------><------><------><------><------>HEADER_SIZE, ts->buf); <------><------><------><------>break; <------><------><------>} <------><------><------>for (i = 0; i < report_count; i++) { <------><------><------><------>u8 *buf = ts->buf + HEADER_SIZE + <------><------><------><------><------><------><------>i * PACKET_SIZE; <------><------><------><------>elants_i2c_event(ts, buf); <------><------><------>} <------><------><------>break; <------><------>default: <------><------><------>dev_err(&client->dev, "unknown packet %*ph\n", <------><------><------><------>HEADER_SIZE, ts->buf); <------><------><------>break; <------><------>} <------><------>break; <------>} out: <------>return IRQ_HANDLED; } /* * sysfs interface */ static ssize_t calibrate_store(struct device *dev, <------><------><------> struct device_attribute *attr, <------><------><------> const char *buf, size_t count) { <------>struct i2c_client *client = to_i2c_client(dev); <------>struct elants_data *ts = i2c_get_clientdata(client); <------>int error; <------>error = mutex_lock_interruptible(&ts->sysfs_mutex); <------>if (error) <------><------>return error; <------>error = elants_i2c_calibrate(ts); <------>mutex_unlock(&ts->sysfs_mutex); <------>return error ?: count; } static ssize_t write_update_fw(struct device *dev, <------><------><------> struct device_attribute *attr, <------><------><------> const char *buf, size_t count) { <------>struct i2c_client *client = to_i2c_client(dev); <------>struct elants_data *ts = i2c_get_clientdata(client); <------>int error; <------>error = mutex_lock_interruptible(&ts->sysfs_mutex); <------>if (error) <------><------>return error; <------>error = elants_i2c_fw_update(ts); <------>dev_dbg(dev, "firmware update result: %d\n", error); <------>mutex_unlock(&ts->sysfs_mutex); <------>return error ?: count; } static ssize_t show_iap_mode(struct device *dev, <------><------><------> struct device_attribute *attr, char *buf) { <------>struct i2c_client *client = to_i2c_client(dev); <------>struct elants_data *ts = i2c_get_clientdata(client); <------>return sprintf(buf, "%s\n", <------><------> ts->iap_mode == ELAN_IAP_OPERATIONAL ? <------><------><------><------>"Normal" : "Recovery"); } static ssize_t show_calibration_count(struct device *dev, <------><------><------><------> struct device_attribute *attr, char *buf) { <------>struct i2c_client *client = to_i2c_client(dev); <------>const u8 cmd[] = { CMD_HEADER_READ, E_ELAN_INFO_REK, 0x00, 0x01 }; <------>u8 resp[HEADER_SIZE]; <------>u16 rek_count; <------>int error; <------>error = elants_i2c_execute_command(client, cmd, sizeof(cmd), <------><------><------><------><------> resp, sizeof(resp), 1, <------><------><------><------><------> "read ReK status"); <------>if (error) <------><------>return sprintf(buf, "%d\n", error); <------>rek_count = get_unaligned_be16(&resp[2]); <------>return sprintf(buf, "0x%04x\n", rek_count); } static DEVICE_ATTR_WO(calibrate); static DEVICE_ATTR(iap_mode, S_IRUGO, show_iap_mode, NULL); static DEVICE_ATTR(calibration_count, S_IRUGO, show_calibration_count, NULL); static DEVICE_ATTR(update_fw, S_IWUSR, NULL, write_update_fw); struct elants_version_attribute { <------>struct device_attribute dattr; <------>size_t field_offset; <------>size_t field_size; }; #define __ELANTS_FIELD_SIZE(_field) \ <------>sizeof(((struct elants_data *)NULL)->_field) #define __ELANTS_VERIFY_SIZE(_field) \ <------>(BUILD_BUG_ON_ZERO(__ELANTS_FIELD_SIZE(_field) > 2) + \ <------> __ELANTS_FIELD_SIZE(_field)) #define ELANTS_VERSION_ATTR(_field) \ <------>struct elants_version_attribute elants_ver_attr_##_field = { \ <------><------>.dattr = __ATTR(_field, S_IRUGO, \ <------><------><------><------>elants_version_attribute_show, NULL), \ <------><------>.field_offset = offsetof(struct elants_data, _field), \ <------><------>.field_size = __ELANTS_VERIFY_SIZE(_field), \ <------>} static ssize_t elants_version_attribute_show(struct device *dev, <------><------><------><------><------> struct device_attribute *dattr, <------><------><------><------><------> char *buf) { <------>struct i2c_client *client = to_i2c_client(dev); <------>struct elants_data *ts = i2c_get_clientdata(client); <------>struct elants_version_attribute *attr = <------><------>container_of(dattr, struct elants_version_attribute, dattr); <------>u8 *field = (u8 *)((char *)ts + attr->field_offset); <------>unsigned int fmt_size; <------>unsigned int val; <------>if (attr->field_size == 1) { <------><------>val = *field; <------><------>fmt_size = 2; /* 2 HEX digits */ <------>} else { <------><------>val = *(u16 *)field; <------><------>fmt_size = 4; /* 4 HEX digits */ <------>} <------>return sprintf(buf, "%0*x\n", fmt_size, val); } static ELANTS_VERSION_ATTR(fw_version); static ELANTS_VERSION_ATTR(hw_version); static ELANTS_VERSION_ATTR(test_version); static ELANTS_VERSION_ATTR(solution_version); static ELANTS_VERSION_ATTR(bc_version); static ELANTS_VERSION_ATTR(iap_version); static struct attribute *elants_attributes[] = { <------>&dev_attr_calibrate.attr, <------>&dev_attr_update_fw.attr, <------>&dev_attr_iap_mode.attr, <------>&dev_attr_calibration_count.attr, <------>&elants_ver_attr_fw_version.dattr.attr, <------>&elants_ver_attr_hw_version.dattr.attr, <------>&elants_ver_attr_test_version.dattr.attr, <------>&elants_ver_attr_solution_version.dattr.attr, <------>&elants_ver_attr_bc_version.dattr.attr, <------>&elants_ver_attr_iap_version.dattr.attr, <------>NULL }; static const struct attribute_group elants_attribute_group = { <------>.attrs = elants_attributes, }; static int elants_i2c_power_on(struct elants_data *ts) { <------>int error; <------>/* <------> * If we do not have reset gpio assume platform firmware <------> * controls regulators and does power them on for us. <------> */ <------>if (IS_ERR_OR_NULL(ts->reset_gpio)) <------><------>return 0; <------>gpiod_set_value_cansleep(ts->reset_gpio, 1); <------>error = regulator_enable(ts->vcc33); <------>if (error) { <------><------>dev_err(&ts->client->dev, <------><------><------>"failed to enable vcc33 regulator: %d\n", <------><------><------>error); <------><------>goto release_reset_gpio; <------>} <------>error = regulator_enable(ts->vccio); <------>if (error) { <------><------>dev_err(&ts->client->dev, <------><------><------>"failed to enable vccio regulator: %d\n", <------><------><------>error); <------><------>regulator_disable(ts->vcc33); <------><------>goto release_reset_gpio; <------>} <------>/* <------> * We need to wait a bit after powering on controller before <------> * we are allowed to release reset GPIO. <------> */ <------>udelay(ELAN_POWERON_DELAY_USEC); release_reset_gpio: <------>gpiod_set_value_cansleep(ts->reset_gpio, 0); <------>if (error) <------><------>return error; <------>msleep(ELAN_RESET_DELAY_MSEC); <------>return 0; } static void elants_i2c_power_off(void *_data) { <------>struct elants_data *ts = _data; <------>if (!IS_ERR_OR_NULL(ts->reset_gpio)) { <------><------>/* <------><------> * Activate reset gpio to prevent leakage through the <------><------> * pin once we shut off power to the controller. <------><------> */ <------><------>gpiod_set_value_cansleep(ts->reset_gpio, 1); <------><------>regulator_disable(ts->vccio); <------><------>regulator_disable(ts->vcc33); <------>} } #ifdef CONFIG_ACPI static const struct acpi_device_id i2c_hid_ids[] = { <------>{"ACPI0C50", 0 }, <------>{"PNP0C50", 0 }, <------>{ }, }; static const guid_t i2c_hid_guid = <------>GUID_INIT(0x3CDFF6F7, 0x4267, 0x4555, <------><------> 0xAD, 0x05, 0xB3, 0x0A, 0x3D, 0x89, 0x38, 0xDE); static bool elants_acpi_is_hid_device(struct device *dev) { <------>acpi_handle handle = ACPI_HANDLE(dev); <------>union acpi_object *obj; <------>if (acpi_match_device_ids(ACPI_COMPANION(dev), i2c_hid_ids)) <------><------>return false; <------>obj = acpi_evaluate_dsm_typed(handle, &i2c_hid_guid, 1, 1, NULL, ACPI_TYPE_INTEGER); <------>if (obj) { <------><------>ACPI_FREE(obj); <------><------>return true; <------>} <------>return false; } #else static bool elants_acpi_is_hid_device(struct device *dev) { <------>return false; } #endif static int elants_i2c_probe(struct i2c_client *client, <------><------><------> const struct i2c_device_id *id) { <------>union i2c_smbus_data dummy; <------>struct elants_data *ts; <------>unsigned long irqflags; <------>int error; <------>/* Don't bind to i2c-hid compatible devices, these are handled by the i2c-hid drv. */ <------>if (elants_acpi_is_hid_device(&client->dev)) { <------><------>dev_warn(&client->dev, "This device appears to be an I2C-HID device, not binding\n"); <------><------>return -ENODEV; <------>} <------>if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { <------><------>dev_err(&client->dev, "I2C check functionality error\n"); <------><------>return -ENXIO; <------>} <------>ts = devm_kzalloc(&client->dev, sizeof(struct elants_data), GFP_KERNEL); <------>if (!ts) <------><------>return -ENOMEM; <------>mutex_init(&ts->sysfs_mutex); <------>init_completion(&ts->cmd_done); <------>ts->client = client; <------>i2c_set_clientdata(client, ts); <------>ts->vcc33 = devm_regulator_get(&client->dev, "vcc33"); <------>if (IS_ERR(ts->vcc33)) { <------><------>error = PTR_ERR(ts->vcc33); <------><------>if (error != -EPROBE_DEFER) <------><------><------>dev_err(&client->dev, <------><------><------><------>"Failed to get 'vcc33' regulator: %d\n", <------><------><------><------>error); <------><------>return error; <------>} <------>ts->vccio = devm_regulator_get(&client->dev, "vccio"); <------>if (IS_ERR(ts->vccio)) { <------><------>error = PTR_ERR(ts->vccio); <------><------>if (error != -EPROBE_DEFER) <------><------><------>dev_err(&client->dev, <------><------><------><------>"Failed to get 'vccio' regulator: %d\n", <------><------><------><------>error); <------><------>return error; <------>} <------>ts->reset_gpio = devm_gpiod_get(&client->dev, "reset", GPIOD_OUT_LOW); <------>if (IS_ERR(ts->reset_gpio)) { <------><------>error = PTR_ERR(ts->reset_gpio); <------><------>if (error == -EPROBE_DEFER) <------><------><------>return error; <------><------>if (error != -ENOENT && error != -ENOSYS) { <------><------><------>dev_err(&client->dev, <------><------><------><------>"failed to get reset gpio: %d\n", <------><------><------><------>error); <------><------><------>return error; <------><------>} <------><------>ts->keep_power_in_suspend = true; <------>} <------>error = elants_i2c_power_on(ts); <------>if (error) <------><------>return error; <------>error = devm_add_action(&client->dev, elants_i2c_power_off, ts); <------>if (error) { <------><------>dev_err(&client->dev, <------><------><------>"failed to install power off action: %d\n", error); <------><------>elants_i2c_power_off(ts); <------><------>return error; <------>} <------>/* Make sure there is something at this address */ <------>if (i2c_smbus_xfer(client->adapter, client->addr, 0, <------><------><------> I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0) { <------><------>dev_err(&client->dev, "nothing at this address\n"); <------><------>return -ENXIO; <------>} <------>error = elants_i2c_initialize(ts); <------>if (error) { <------><------>dev_err(&client->dev, "failed to initialize: %d\n", error); <------><------>return error; <------>} <------>ts->input = devm_input_allocate_device(&client->dev); <------>if (!ts->input) { <------><------>dev_err(&client->dev, "Failed to allocate input device\n"); <------><------>return -ENOMEM; <------>} <------>ts->input->name = "Elan Touchscreen"; <------>ts->input->id.bustype = BUS_I2C; <------>/* Multitouch input params setup */ <------>input_set_abs_params(ts->input, ABS_MT_POSITION_X, 0, ts->x_max, 0, 0); <------>input_set_abs_params(ts->input, ABS_MT_POSITION_Y, 0, ts->y_max, 0, 0); <------>input_set_abs_params(ts->input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); <------>input_set_abs_params(ts->input, ABS_MT_PRESSURE, 0, 255, 0, 0); <------>input_set_abs_params(ts->input, ABS_MT_TOOL_TYPE, <------><------><------> 0, MT_TOOL_PALM, 0, 0); <------>input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->x_res); <------>input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->y_res); <------>if (ts->major_res > 0) <------><------>input_abs_set_res(ts->input, ABS_MT_TOUCH_MAJOR, ts->major_res); <------>touchscreen_parse_properties(ts->input, true, &ts->prop); <------>error = input_mt_init_slots(ts->input, MAX_CONTACT_NUM, <------><------><------><------> INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); <------>if (error) { <------><------>dev_err(&client->dev, <------><------><------>"failed to initialize MT slots: %d\n", error); <------><------>return error; <------>} <------>error = input_register_device(ts->input); <------>if (error) { <------><------>dev_err(&client->dev, <------><------><------>"unable to register input device: %d\n", error); <------><------>return error; <------>} <------>/* <------> * Platform code (ACPI, DTS) should normally set up interrupt <------> * for us, but in case it did not let's fall back to using falling <------> * edge to be compatible with older Chromebooks. <------> */ <------>irqflags = irq_get_trigger_type(client->irq); <------>if (!irqflags) <------><------>irqflags = IRQF_TRIGGER_FALLING; <------>error = devm_request_threaded_irq(&client->dev, client->irq, <------><------><------><------><------> NULL, elants_i2c_irq, <------><------><------><------><------> irqflags | IRQF_ONESHOT, <------><------><------><------><------> client->name, ts); <------>if (error) { <------><------>dev_err(&client->dev, "Failed to register interrupt\n"); <------><------>return error; <------>} <------>/* <------> * Systems using device tree should set up wakeup via DTS, <------> * the rest will configure device as wakeup source by default. <------> */ <------>if (!client->dev.of_node) <------><------>device_init_wakeup(&client->dev, true); <------>error = devm_device_add_group(&client->dev, &elants_attribute_group); <------>if (error) { <------><------>dev_err(&client->dev, "failed to create sysfs attributes: %d\n", <------><------><------>error); <------><------>return error; <------>} <------>return 0; } static int __maybe_unused elants_i2c_suspend(struct device *dev) { <------>struct i2c_client *client = to_i2c_client(dev); <------>struct elants_data *ts = i2c_get_clientdata(client); <------>const u8 set_sleep_cmd[] = { 0x54, 0x50, 0x00, 0x01 }; <------>int retry_cnt; <------>int error; <------>/* Command not support in IAP recovery mode */ <------>if (ts->iap_mode != ELAN_IAP_OPERATIONAL) <------><------>return -EBUSY; <------>disable_irq(client->irq); <------>if (device_may_wakeup(dev)) { <------><------>/* <------><------> * The device will automatically enter idle mode <------><------> * that has reduced power consumption. <------><------> */ <------><------>ts->wake_irq_enabled = (enable_irq_wake(client->irq) == 0); <------>} else if (ts->keep_power_in_suspend) { <------><------>for (retry_cnt = 0; retry_cnt < MAX_RETRIES; retry_cnt++) { <------><------><------>error = elants_i2c_send(client, set_sleep_cmd, <------><------><------><------><------><------>sizeof(set_sleep_cmd)); <------><------><------>if (!error) <------><------><------><------>break; <------><------><------>dev_err(&client->dev, <------><------><------><------>"suspend command failed: %d\n", error); <------><------>} <------>} else { <------><------>elants_i2c_power_off(ts); <------>} <------>return 0; } static int __maybe_unused elants_i2c_resume(struct device *dev) { <------>struct i2c_client *client = to_i2c_client(dev); <------>struct elants_data *ts = i2c_get_clientdata(client); <------>const u8 set_active_cmd[] = { 0x54, 0x58, 0x00, 0x01 }; <------>int retry_cnt; <------>int error; <------>if (device_may_wakeup(dev)) { <------><------>if (ts->wake_irq_enabled) <------><------><------>disable_irq_wake(client->irq); <------><------>elants_i2c_sw_reset(client); <------>} else if (ts->keep_power_in_suspend) { <------><------>for (retry_cnt = 0; retry_cnt < MAX_RETRIES; retry_cnt++) { <------><------><------>error = elants_i2c_send(client, set_active_cmd, <------><------><------><------><------><------>sizeof(set_active_cmd)); <------><------><------>if (!error) <------><------><------><------>break; <------><------><------>dev_err(&client->dev, <------><------><------><------>"resume command failed: %d\n", error); <------><------>} <------>} else { <------><------>elants_i2c_power_on(ts); <------><------>elants_i2c_initialize(ts); <------>} <------>ts->state = ELAN_STATE_NORMAL; <------>enable_irq(client->irq); <------>return 0; } static SIMPLE_DEV_PM_OPS(elants_i2c_pm_ops, <------><------><------> elants_i2c_suspend, elants_i2c_resume); static const struct i2c_device_id elants_i2c_id[] = { <------>{ DEVICE_NAME, 0 }, <------>{ } }; MODULE_DEVICE_TABLE(i2c, elants_i2c_id); #ifdef CONFIG_ACPI static const struct acpi_device_id elants_acpi_id[] = { <------>{ "ELAN0001", 0 }, <------>{ } }; MODULE_DEVICE_TABLE(acpi, elants_acpi_id); #endif #ifdef CONFIG_OF static const struct of_device_id elants_of_match[] = { <------>{ .compatible = "elan,ekth3500" }, <------>{ /* sentinel */ } }; MODULE_DEVICE_TABLE(of, elants_of_match); #endif static struct i2c_driver elants_i2c_driver = { <------>.probe = elants_i2c_probe, <------>.id_table = elants_i2c_id, <------>.driver = { <------><------>.name = DEVICE_NAME, <------><------>.pm = &elants_i2c_pm_ops, <------><------>.acpi_match_table = ACPI_PTR(elants_acpi_id), <------><------>.of_match_table = of_match_ptr(elants_of_match), <------><------>.probe_type = PROBE_PREFER_ASYNCHRONOUS, <------>}, }; module_i2c_driver(elants_i2c_driver); MODULE_AUTHOR("Scott Liu <scott.liu@emc.com.tw>"); MODULE_DESCRIPTION("Elan I2c Touchscreen driver"); MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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