1ca96ea86SBastien Nocera /* 2ca96ea86SBastien Nocera * Driver for Goodix Touchscreens 3ca96ea86SBastien Nocera * 4ca96ea86SBastien Nocera * Copyright (c) 2014 Red Hat Inc. 5ca96ea86SBastien Nocera * 6ca96ea86SBastien Nocera * This code is based on gt9xx.c authored by andrew@goodix.com: 7ca96ea86SBastien Nocera * 8ca96ea86SBastien Nocera * 2010 - 2012 Goodix Technology. 9ca96ea86SBastien Nocera */ 10ca96ea86SBastien Nocera 11ca96ea86SBastien Nocera /* 12ca96ea86SBastien Nocera * This program is free software; you can redistribute it and/or modify it 13ca96ea86SBastien Nocera * under the terms of the GNU General Public License as published by the Free 14ca96ea86SBastien Nocera * Software Foundation; version 2 of the License. 15ca96ea86SBastien Nocera */ 16ca96ea86SBastien Nocera 17ca96ea86SBastien Nocera #include <linux/kernel.h> 188b5a359cSBastien Nocera #include <linux/dmi.h> 1968caf858SIrina Tirdea #include <linux/firmware.h> 20ec6e1b40SIrina Tirdea #include <linux/gpio/consumer.h> 21ca96ea86SBastien Nocera #include <linux/i2c.h> 22ca96ea86SBastien Nocera #include <linux/input.h> 23ca96ea86SBastien Nocera #include <linux/input/mt.h> 24ca96ea86SBastien Nocera #include <linux/module.h> 25ca96ea86SBastien Nocera #include <linux/delay.h> 26ca96ea86SBastien Nocera #include <linux/irq.h> 27ca96ea86SBastien Nocera #include <linux/interrupt.h> 28ca96ea86SBastien Nocera #include <linux/slab.h> 29771d8f1bSAleksei Mamlin #include <linux/acpi.h> 30771d8f1bSAleksei Mamlin #include <linux/of.h> 31ca96ea86SBastien Nocera #include <asm/unaligned.h> 32ca96ea86SBastien Nocera 33ca96ea86SBastien Nocera struct goodix_ts_data { 34ca96ea86SBastien Nocera struct i2c_client *client; 35ca96ea86SBastien Nocera struct input_dev *input_dev; 36ca96ea86SBastien Nocera int abs_x_max; 37ca96ea86SBastien Nocera int abs_y_max; 38ca96ea86SBastien Nocera unsigned int max_touch_num; 39ca96ea86SBastien Nocera unsigned int int_trigger_type; 408b5a359cSBastien Nocera bool rotated_screen; 41a779fbc6SIrina Tirdea int cfg_len; 42ec6e1b40SIrina Tirdea struct gpio_desc *gpiod_int; 43ec6e1b40SIrina Tirdea struct gpio_desc *gpiod_rst; 4468caf858SIrina Tirdea u16 id; 4568caf858SIrina Tirdea u16 version; 4668caf858SIrina Tirdea const char *cfg_name; 4768caf858SIrina Tirdea struct completion firmware_loading_complete; 485ab09d6aSIrina Tirdea unsigned long irq_flags; 49ca96ea86SBastien Nocera }; 50ca96ea86SBastien Nocera 51ec6e1b40SIrina Tirdea #define GOODIX_GPIO_INT_NAME "irq" 52ec6e1b40SIrina Tirdea #define GOODIX_GPIO_RST_NAME "reset" 53ec6e1b40SIrina Tirdea 54ca96ea86SBastien Nocera #define GOODIX_MAX_HEIGHT 4096 55ca96ea86SBastien Nocera #define GOODIX_MAX_WIDTH 4096 56ca96ea86SBastien Nocera #define GOODIX_INT_TRIGGER 1 57ca96ea86SBastien Nocera #define GOODIX_CONTACT_SIZE 8 58ca96ea86SBastien Nocera #define GOODIX_MAX_CONTACTS 10 59ca96ea86SBastien Nocera 60ca96ea86SBastien Nocera #define GOODIX_CONFIG_MAX_LENGTH 240 61a779fbc6SIrina Tirdea #define GOODIX_CONFIG_911_LENGTH 186 62a779fbc6SIrina Tirdea #define GOODIX_CONFIG_967_LENGTH 228 63ca96ea86SBastien Nocera 64ca96ea86SBastien Nocera /* Register defines */ 655ab09d6aSIrina Tirdea #define GOODIX_REG_COMMAND 0x8040 665ab09d6aSIrina Tirdea #define GOODIX_CMD_SCREEN_OFF 0x05 675ab09d6aSIrina Tirdea 68ca96ea86SBastien Nocera #define GOODIX_READ_COOR_ADDR 0x814E 69ca96ea86SBastien Nocera #define GOODIX_REG_CONFIG_DATA 0x8047 70e70b0307SIrina Tirdea #define GOODIX_REG_ID 0x8140 71ca96ea86SBastien Nocera 72ca96ea86SBastien Nocera #define RESOLUTION_LOC 1 73a7ac7c95SAleksei Mamlin #define MAX_CONTACTS_LOC 5 74ca96ea86SBastien Nocera #define TRIGGER_LOC 6 75ca96ea86SBastien Nocera 76ca96ea86SBastien Nocera static const unsigned long goodix_irq_flags[] = { 77ca96ea86SBastien Nocera IRQ_TYPE_EDGE_RISING, 78ca96ea86SBastien Nocera IRQ_TYPE_EDGE_FALLING, 79ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_LOW, 80ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_HIGH, 81ca96ea86SBastien Nocera }; 82ca96ea86SBastien Nocera 838b5a359cSBastien Nocera /* 848b5a359cSBastien Nocera * Those tablets have their coordinates origin at the bottom right 858b5a359cSBastien Nocera * of the tablet, as if rotated 180 degrees 868b5a359cSBastien Nocera */ 878b5a359cSBastien Nocera static const struct dmi_system_id rotated_screen[] = { 888b5a359cSBastien Nocera #if defined(CONFIG_DMI) && defined(CONFIG_X86) 898b5a359cSBastien Nocera { 908b5a359cSBastien Nocera .ident = "WinBook TW100", 918b5a359cSBastien Nocera .matches = { 928b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 938b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW100") 948b5a359cSBastien Nocera } 958b5a359cSBastien Nocera }, 968b5a359cSBastien Nocera { 978b5a359cSBastien Nocera .ident = "WinBook TW700", 988b5a359cSBastien Nocera .matches = { 998b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 1008b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW700") 1018b5a359cSBastien Nocera }, 1028b5a359cSBastien Nocera }, 1038b5a359cSBastien Nocera #endif 1048b5a359cSBastien Nocera {} 1058b5a359cSBastien Nocera }; 1068b5a359cSBastien Nocera 107ca96ea86SBastien Nocera /** 108ca96ea86SBastien Nocera * goodix_i2c_read - read data from a register of the i2c slave device. 109ca96ea86SBastien Nocera * 110ca96ea86SBastien Nocera * @client: i2c device. 111ca96ea86SBastien Nocera * @reg: the register to read from. 112ca96ea86SBastien Nocera * @buf: raw write data buffer. 113ca96ea86SBastien Nocera * @len: length of the buffer to write 114ca96ea86SBastien Nocera */ 115ca96ea86SBastien Nocera static int goodix_i2c_read(struct i2c_client *client, 116ca96ea86SBastien Nocera u16 reg, u8 *buf, int len) 117ca96ea86SBastien Nocera { 118ca96ea86SBastien Nocera struct i2c_msg msgs[2]; 119ca96ea86SBastien Nocera u16 wbuf = cpu_to_be16(reg); 120ca96ea86SBastien Nocera int ret; 121ca96ea86SBastien Nocera 122ca96ea86SBastien Nocera msgs[0].flags = 0; 123ca96ea86SBastien Nocera msgs[0].addr = client->addr; 124ca96ea86SBastien Nocera msgs[0].len = 2; 125ca96ea86SBastien Nocera msgs[0].buf = (u8 *)&wbuf; 126ca96ea86SBastien Nocera 127ca96ea86SBastien Nocera msgs[1].flags = I2C_M_RD; 128ca96ea86SBastien Nocera msgs[1].addr = client->addr; 129ca96ea86SBastien Nocera msgs[1].len = len; 130ca96ea86SBastien Nocera msgs[1].buf = buf; 131ca96ea86SBastien Nocera 132ca96ea86SBastien Nocera ret = i2c_transfer(client->adapter, msgs, 2); 133ca96ea86SBastien Nocera return ret < 0 ? ret : (ret != ARRAY_SIZE(msgs) ? -EIO : 0); 134ca96ea86SBastien Nocera } 135ca96ea86SBastien Nocera 13668caf858SIrina Tirdea /** 13768caf858SIrina Tirdea * goodix_i2c_write - write data to a register of the i2c slave device. 13868caf858SIrina Tirdea * 13968caf858SIrina Tirdea * @client: i2c device. 14068caf858SIrina Tirdea * @reg: the register to write to. 14168caf858SIrina Tirdea * @buf: raw data buffer to write. 14268caf858SIrina Tirdea * @len: length of the buffer to write 14368caf858SIrina Tirdea */ 14468caf858SIrina Tirdea static int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf, 14568caf858SIrina Tirdea unsigned len) 14668caf858SIrina Tirdea { 14768caf858SIrina Tirdea u8 *addr_buf; 14868caf858SIrina Tirdea struct i2c_msg msg; 14968caf858SIrina Tirdea int ret; 15068caf858SIrina Tirdea 15168caf858SIrina Tirdea addr_buf = kmalloc(len + 2, GFP_KERNEL); 15268caf858SIrina Tirdea if (!addr_buf) 15368caf858SIrina Tirdea return -ENOMEM; 15468caf858SIrina Tirdea 15568caf858SIrina Tirdea addr_buf[0] = reg >> 8; 15668caf858SIrina Tirdea addr_buf[1] = reg & 0xFF; 15768caf858SIrina Tirdea memcpy(&addr_buf[2], buf, len); 15868caf858SIrina Tirdea 15968caf858SIrina Tirdea msg.flags = 0; 16068caf858SIrina Tirdea msg.addr = client->addr; 16168caf858SIrina Tirdea msg.buf = addr_buf; 16268caf858SIrina Tirdea msg.len = len + 2; 16368caf858SIrina Tirdea 16468caf858SIrina Tirdea ret = i2c_transfer(client->adapter, &msg, 1); 16568caf858SIrina Tirdea kfree(addr_buf); 16668caf858SIrina Tirdea return ret < 0 ? ret : (ret != 1 ? -EIO : 0); 16768caf858SIrina Tirdea } 16868caf858SIrina Tirdea 1695ab09d6aSIrina Tirdea static int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value) 1705ab09d6aSIrina Tirdea { 1715ab09d6aSIrina Tirdea return goodix_i2c_write(client, reg, &value, sizeof(value)); 1725ab09d6aSIrina Tirdea } 1735ab09d6aSIrina Tirdea 174a779fbc6SIrina Tirdea static int goodix_get_cfg_len(u16 id) 175a779fbc6SIrina Tirdea { 176a779fbc6SIrina Tirdea switch (id) { 177a779fbc6SIrina Tirdea case 911: 178a779fbc6SIrina Tirdea case 9271: 179a779fbc6SIrina Tirdea case 9110: 180a779fbc6SIrina Tirdea case 927: 181a779fbc6SIrina Tirdea case 928: 182a779fbc6SIrina Tirdea return GOODIX_CONFIG_911_LENGTH; 183a779fbc6SIrina Tirdea 184a779fbc6SIrina Tirdea case 912: 185a779fbc6SIrina Tirdea case 967: 186a779fbc6SIrina Tirdea return GOODIX_CONFIG_967_LENGTH; 187a779fbc6SIrina Tirdea 188a779fbc6SIrina Tirdea default: 189a779fbc6SIrina Tirdea return GOODIX_CONFIG_MAX_LENGTH; 190a779fbc6SIrina Tirdea } 191a779fbc6SIrina Tirdea } 192a779fbc6SIrina Tirdea 193ca96ea86SBastien Nocera static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data) 194ca96ea86SBastien Nocera { 195ca96ea86SBastien Nocera int touch_num; 196ca96ea86SBastien Nocera int error; 197ca96ea86SBastien Nocera 198ca96ea86SBastien Nocera error = goodix_i2c_read(ts->client, GOODIX_READ_COOR_ADDR, data, 199ca96ea86SBastien Nocera GOODIX_CONTACT_SIZE + 1); 200ca96ea86SBastien Nocera if (error) { 201ca96ea86SBastien Nocera dev_err(&ts->client->dev, "I2C transfer error: %d\n", error); 202ca96ea86SBastien Nocera return error; 203ca96ea86SBastien Nocera } 204ca96ea86SBastien Nocera 2055f6f117cSPaul Cercueil if (!(data[0] & 0x80)) 2065f6f117cSPaul Cercueil return -EAGAIN; 2075f6f117cSPaul Cercueil 208ca96ea86SBastien Nocera touch_num = data[0] & 0x0f; 209a7ac7c95SAleksei Mamlin if (touch_num > ts->max_touch_num) 210ca96ea86SBastien Nocera return -EPROTO; 211ca96ea86SBastien Nocera 212ca96ea86SBastien Nocera if (touch_num > 1) { 213ca96ea86SBastien Nocera data += 1 + GOODIX_CONTACT_SIZE; 214ca96ea86SBastien Nocera error = goodix_i2c_read(ts->client, 215ca96ea86SBastien Nocera GOODIX_READ_COOR_ADDR + 216ca96ea86SBastien Nocera 1 + GOODIX_CONTACT_SIZE, 217ca96ea86SBastien Nocera data, 218ca96ea86SBastien Nocera GOODIX_CONTACT_SIZE * (touch_num - 1)); 219ca96ea86SBastien Nocera if (error) 220ca96ea86SBastien Nocera return error; 221ca96ea86SBastien Nocera } 222ca96ea86SBastien Nocera 223ca96ea86SBastien Nocera return touch_num; 224ca96ea86SBastien Nocera } 225ca96ea86SBastien Nocera 226ca96ea86SBastien Nocera static void goodix_ts_report_touch(struct goodix_ts_data *ts, u8 *coor_data) 227ca96ea86SBastien Nocera { 228ca96ea86SBastien Nocera int id = coor_data[0] & 0x0F; 229ca96ea86SBastien Nocera int input_x = get_unaligned_le16(&coor_data[1]); 230ca96ea86SBastien Nocera int input_y = get_unaligned_le16(&coor_data[3]); 231ca96ea86SBastien Nocera int input_w = get_unaligned_le16(&coor_data[5]); 232ca96ea86SBastien Nocera 2338b5a359cSBastien Nocera if (ts->rotated_screen) { 2348b5a359cSBastien Nocera input_x = ts->abs_x_max - input_x; 2358b5a359cSBastien Nocera input_y = ts->abs_y_max - input_y; 2368b5a359cSBastien Nocera } 2378b5a359cSBastien Nocera 238ca96ea86SBastien Nocera input_mt_slot(ts->input_dev, id); 239ca96ea86SBastien Nocera input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 240ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_POSITION_X, input_x); 241ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_POSITION_Y, input_y); 242ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 243ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 244ca96ea86SBastien Nocera } 245ca96ea86SBastien Nocera 246ca96ea86SBastien Nocera /** 247ca96ea86SBastien Nocera * goodix_process_events - Process incoming events 248ca96ea86SBastien Nocera * 249ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 250ca96ea86SBastien Nocera * 251ca96ea86SBastien Nocera * Called when the IRQ is triggered. Read the current device state, and push 252ca96ea86SBastien Nocera * the input events to the user space. 253ca96ea86SBastien Nocera */ 254ca96ea86SBastien Nocera static void goodix_process_events(struct goodix_ts_data *ts) 255ca96ea86SBastien Nocera { 2560e0432f0SIrina Tirdea u8 point_data[1 + GOODIX_CONTACT_SIZE * GOODIX_MAX_CONTACTS]; 257ca96ea86SBastien Nocera int touch_num; 258ca96ea86SBastien Nocera int i; 259ca96ea86SBastien Nocera 260ca96ea86SBastien Nocera touch_num = goodix_ts_read_input_report(ts, point_data); 261ca96ea86SBastien Nocera if (touch_num < 0) 262ca96ea86SBastien Nocera return; 263ca96ea86SBastien Nocera 264ca96ea86SBastien Nocera for (i = 0; i < touch_num; i++) 265ca96ea86SBastien Nocera goodix_ts_report_touch(ts, 266ca96ea86SBastien Nocera &point_data[1 + GOODIX_CONTACT_SIZE * i]); 267ca96ea86SBastien Nocera 268ca96ea86SBastien Nocera input_mt_sync_frame(ts->input_dev); 269ca96ea86SBastien Nocera input_sync(ts->input_dev); 270ca96ea86SBastien Nocera } 271ca96ea86SBastien Nocera 272ca96ea86SBastien Nocera /** 273ca96ea86SBastien Nocera * goodix_ts_irq_handler - The IRQ handler 274ca96ea86SBastien Nocera * 275ca96ea86SBastien Nocera * @irq: interrupt number. 276ca96ea86SBastien Nocera * @dev_id: private data pointer. 277ca96ea86SBastien Nocera */ 278ca96ea86SBastien Nocera static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id) 279ca96ea86SBastien Nocera { 280ca96ea86SBastien Nocera struct goodix_ts_data *ts = dev_id; 281ca96ea86SBastien Nocera 282ca96ea86SBastien Nocera goodix_process_events(ts); 283ca96ea86SBastien Nocera 2845d655b35SIrina Tirdea if (goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0) < 0) 285ca96ea86SBastien Nocera dev_err(&ts->client->dev, "I2C write end_cmd error\n"); 286ca96ea86SBastien Nocera 287ca96ea86SBastien Nocera return IRQ_HANDLED; 288ca96ea86SBastien Nocera } 289ca96ea86SBastien Nocera 2905ab09d6aSIrina Tirdea static void goodix_free_irq(struct goodix_ts_data *ts) 2915ab09d6aSIrina Tirdea { 2925ab09d6aSIrina Tirdea devm_free_irq(&ts->client->dev, ts->client->irq, ts); 2935ab09d6aSIrina Tirdea } 2945ab09d6aSIrina Tirdea 2955ab09d6aSIrina Tirdea static int goodix_request_irq(struct goodix_ts_data *ts) 2965ab09d6aSIrina Tirdea { 2975ab09d6aSIrina Tirdea return devm_request_threaded_irq(&ts->client->dev, ts->client->irq, 2985ab09d6aSIrina Tirdea NULL, goodix_ts_irq_handler, 2995ab09d6aSIrina Tirdea ts->irq_flags, ts->client->name, ts); 3005ab09d6aSIrina Tirdea } 3015ab09d6aSIrina Tirdea 30268caf858SIrina Tirdea /** 30368caf858SIrina Tirdea * goodix_check_cfg - Checks if config fw is valid 30468caf858SIrina Tirdea * 30568caf858SIrina Tirdea * @ts: goodix_ts_data pointer 30668caf858SIrina Tirdea * @cfg: firmware config data 30768caf858SIrina Tirdea */ 30868caf858SIrina Tirdea static int goodix_check_cfg(struct goodix_ts_data *ts, 30968caf858SIrina Tirdea const struct firmware *cfg) 31068caf858SIrina Tirdea { 31168caf858SIrina Tirdea int i, raw_cfg_len; 31268caf858SIrina Tirdea u8 check_sum = 0; 31368caf858SIrina Tirdea 31468caf858SIrina Tirdea if (cfg->size > GOODIX_CONFIG_MAX_LENGTH) { 31568caf858SIrina Tirdea dev_err(&ts->client->dev, 31668caf858SIrina Tirdea "The length of the config fw is not correct"); 31768caf858SIrina Tirdea return -EINVAL; 31868caf858SIrina Tirdea } 31968caf858SIrina Tirdea 32068caf858SIrina Tirdea raw_cfg_len = cfg->size - 2; 32168caf858SIrina Tirdea for (i = 0; i < raw_cfg_len; i++) 32268caf858SIrina Tirdea check_sum += cfg->data[i]; 32368caf858SIrina Tirdea check_sum = (~check_sum) + 1; 32468caf858SIrina Tirdea if (check_sum != cfg->data[raw_cfg_len]) { 32568caf858SIrina Tirdea dev_err(&ts->client->dev, 32668caf858SIrina Tirdea "The checksum of the config fw is not correct"); 32768caf858SIrina Tirdea return -EINVAL; 32868caf858SIrina Tirdea } 32968caf858SIrina Tirdea 33068caf858SIrina Tirdea if (cfg->data[raw_cfg_len + 1] != 1) { 33168caf858SIrina Tirdea dev_err(&ts->client->dev, 33268caf858SIrina Tirdea "Config fw must have Config_Fresh register set"); 33368caf858SIrina Tirdea return -EINVAL; 33468caf858SIrina Tirdea } 33568caf858SIrina Tirdea 33668caf858SIrina Tirdea return 0; 33768caf858SIrina Tirdea } 33868caf858SIrina Tirdea 33968caf858SIrina Tirdea /** 34068caf858SIrina Tirdea * goodix_send_cfg - Write fw config to device 34168caf858SIrina Tirdea * 34268caf858SIrina Tirdea * @ts: goodix_ts_data pointer 34368caf858SIrina Tirdea * @cfg: config firmware to write to device 34468caf858SIrina Tirdea */ 34568caf858SIrina Tirdea static int goodix_send_cfg(struct goodix_ts_data *ts, 34668caf858SIrina Tirdea const struct firmware *cfg) 34768caf858SIrina Tirdea { 34868caf858SIrina Tirdea int error; 34968caf858SIrina Tirdea 35068caf858SIrina Tirdea error = goodix_check_cfg(ts, cfg); 35168caf858SIrina Tirdea if (error) 35268caf858SIrina Tirdea return error; 35368caf858SIrina Tirdea 35468caf858SIrina Tirdea error = goodix_i2c_write(ts->client, GOODIX_REG_CONFIG_DATA, cfg->data, 35568caf858SIrina Tirdea cfg->size); 35668caf858SIrina Tirdea if (error) { 35768caf858SIrina Tirdea dev_err(&ts->client->dev, "Failed to write config data: %d", 35868caf858SIrina Tirdea error); 35968caf858SIrina Tirdea return error; 36068caf858SIrina Tirdea } 36168caf858SIrina Tirdea dev_dbg(&ts->client->dev, "Config sent successfully."); 36268caf858SIrina Tirdea 36368caf858SIrina Tirdea /* Let the firmware reconfigure itself, so sleep for 10ms */ 36468caf858SIrina Tirdea usleep_range(10000, 11000); 36568caf858SIrina Tirdea 36668caf858SIrina Tirdea return 0; 36768caf858SIrina Tirdea } 36868caf858SIrina Tirdea 369ec6e1b40SIrina Tirdea static int goodix_int_sync(struct goodix_ts_data *ts) 370ec6e1b40SIrina Tirdea { 371ec6e1b40SIrina Tirdea int error; 372ec6e1b40SIrina Tirdea 373ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, 0); 374ec6e1b40SIrina Tirdea if (error) 375ec6e1b40SIrina Tirdea return error; 376ec6e1b40SIrina Tirdea 377ec6e1b40SIrina Tirdea msleep(50); /* T5: 50ms */ 378ec6e1b40SIrina Tirdea 379ec6e1b40SIrina Tirdea error = gpiod_direction_input(ts->gpiod_int); 380ec6e1b40SIrina Tirdea if (error) 381ec6e1b40SIrina Tirdea return error; 382ec6e1b40SIrina Tirdea 383ec6e1b40SIrina Tirdea return 0; 384ec6e1b40SIrina Tirdea } 385ec6e1b40SIrina Tirdea 386ec6e1b40SIrina Tirdea /** 387ec6e1b40SIrina Tirdea * goodix_reset - Reset device during power on 388ec6e1b40SIrina Tirdea * 389ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 390ec6e1b40SIrina Tirdea */ 391ec6e1b40SIrina Tirdea static int goodix_reset(struct goodix_ts_data *ts) 392ec6e1b40SIrina Tirdea { 393ec6e1b40SIrina Tirdea int error; 394ec6e1b40SIrina Tirdea 395ec6e1b40SIrina Tirdea /* begin select I2C slave addr */ 396ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 0); 397ec6e1b40SIrina Tirdea if (error) 398ec6e1b40SIrina Tirdea return error; 399ec6e1b40SIrina Tirdea 400ec6e1b40SIrina Tirdea msleep(20); /* T2: > 10ms */ 401ec6e1b40SIrina Tirdea 402ec6e1b40SIrina Tirdea /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */ 403ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, ts->client->addr == 0x14); 404ec6e1b40SIrina Tirdea if (error) 405ec6e1b40SIrina Tirdea return error; 406ec6e1b40SIrina Tirdea 407ec6e1b40SIrina Tirdea usleep_range(100, 2000); /* T3: > 100us */ 408ec6e1b40SIrina Tirdea 409ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 1); 410ec6e1b40SIrina Tirdea if (error) 411ec6e1b40SIrina Tirdea return error; 412ec6e1b40SIrina Tirdea 413ec6e1b40SIrina Tirdea usleep_range(6000, 10000); /* T4: > 5ms */ 414ec6e1b40SIrina Tirdea 415ec6e1b40SIrina Tirdea /* end select I2C slave addr */ 416ec6e1b40SIrina Tirdea error = gpiod_direction_input(ts->gpiod_rst); 417ec6e1b40SIrina Tirdea if (error) 418ec6e1b40SIrina Tirdea return error; 419ec6e1b40SIrina Tirdea 420ec6e1b40SIrina Tirdea error = goodix_int_sync(ts); 421ec6e1b40SIrina Tirdea if (error) 422ec6e1b40SIrina Tirdea return error; 423ec6e1b40SIrina Tirdea 424ec6e1b40SIrina Tirdea return 0; 425ec6e1b40SIrina Tirdea } 426ec6e1b40SIrina Tirdea 427ec6e1b40SIrina Tirdea /** 428ec6e1b40SIrina Tirdea * goodix_get_gpio_config - Get GPIO config from ACPI/DT 429ec6e1b40SIrina Tirdea * 430ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 431ec6e1b40SIrina Tirdea */ 432ec6e1b40SIrina Tirdea static int goodix_get_gpio_config(struct goodix_ts_data *ts) 433ec6e1b40SIrina Tirdea { 434ec6e1b40SIrina Tirdea int error; 435ec6e1b40SIrina Tirdea struct device *dev; 436ec6e1b40SIrina Tirdea struct gpio_desc *gpiod; 437ec6e1b40SIrina Tirdea 438ec6e1b40SIrina Tirdea if (!ts->client) 439ec6e1b40SIrina Tirdea return -EINVAL; 440ec6e1b40SIrina Tirdea dev = &ts->client->dev; 441ec6e1b40SIrina Tirdea 442ec6e1b40SIrina Tirdea /* Get the interrupt GPIO pin number */ 443ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN); 444ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 445ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 446ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 447ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 448ec6e1b40SIrina Tirdea GOODIX_GPIO_INT_NAME, error); 449ec6e1b40SIrina Tirdea return error; 450ec6e1b40SIrina Tirdea } 451ec6e1b40SIrina Tirdea 452ec6e1b40SIrina Tirdea ts->gpiod_int = gpiod; 453ec6e1b40SIrina Tirdea 454ec6e1b40SIrina Tirdea /* Get the reset line GPIO pin number */ 455ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, GPIOD_IN); 456ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 457ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 458ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 459ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 460ec6e1b40SIrina Tirdea GOODIX_GPIO_RST_NAME, error); 461ec6e1b40SIrina Tirdea return error; 462ec6e1b40SIrina Tirdea } 463ec6e1b40SIrina Tirdea 464ec6e1b40SIrina Tirdea ts->gpiod_rst = gpiod; 465ec6e1b40SIrina Tirdea 466ec6e1b40SIrina Tirdea return 0; 467ec6e1b40SIrina Tirdea } 468ec6e1b40SIrina Tirdea 469ca96ea86SBastien Nocera /** 470ca96ea86SBastien Nocera * goodix_read_config - Read the embedded configuration of the panel 471ca96ea86SBastien Nocera * 472ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 473ca96ea86SBastien Nocera * 474ca96ea86SBastien Nocera * Must be called during probe 475ca96ea86SBastien Nocera */ 476ca96ea86SBastien Nocera static void goodix_read_config(struct goodix_ts_data *ts) 477ca96ea86SBastien Nocera { 478ca96ea86SBastien Nocera u8 config[GOODIX_CONFIG_MAX_LENGTH]; 479ca96ea86SBastien Nocera int error; 480ca96ea86SBastien Nocera 481ca96ea86SBastien Nocera error = goodix_i2c_read(ts->client, GOODIX_REG_CONFIG_DATA, 482a779fbc6SIrina Tirdea config, ts->cfg_len); 483ca96ea86SBastien Nocera if (error) { 484ca96ea86SBastien Nocera dev_warn(&ts->client->dev, 485ca96ea86SBastien Nocera "Error reading config (%d), using defaults\n", 486ca96ea86SBastien Nocera error); 487ca96ea86SBastien Nocera ts->abs_x_max = GOODIX_MAX_WIDTH; 488ca96ea86SBastien Nocera ts->abs_y_max = GOODIX_MAX_HEIGHT; 489ca96ea86SBastien Nocera ts->int_trigger_type = GOODIX_INT_TRIGGER; 490a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 491ca96ea86SBastien Nocera return; 492ca96ea86SBastien Nocera } 493ca96ea86SBastien Nocera 494ca96ea86SBastien Nocera ts->abs_x_max = get_unaligned_le16(&config[RESOLUTION_LOC]); 495ca96ea86SBastien Nocera ts->abs_y_max = get_unaligned_le16(&config[RESOLUTION_LOC + 2]); 496a7ac7c95SAleksei Mamlin ts->int_trigger_type = config[TRIGGER_LOC] & 0x03; 497a7ac7c95SAleksei Mamlin ts->max_touch_num = config[MAX_CONTACTS_LOC] & 0x0f; 498a7ac7c95SAleksei Mamlin if (!ts->abs_x_max || !ts->abs_y_max || !ts->max_touch_num) { 499ca96ea86SBastien Nocera dev_err(&ts->client->dev, 500ca96ea86SBastien Nocera "Invalid config, using defaults\n"); 501ca96ea86SBastien Nocera ts->abs_x_max = GOODIX_MAX_WIDTH; 502ca96ea86SBastien Nocera ts->abs_y_max = GOODIX_MAX_HEIGHT; 503a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 504ca96ea86SBastien Nocera } 5058b5a359cSBastien Nocera 5068b5a359cSBastien Nocera ts->rotated_screen = dmi_check_system(rotated_screen); 5078b5a359cSBastien Nocera if (ts->rotated_screen) 5088b5a359cSBastien Nocera dev_dbg(&ts->client->dev, 5098b5a359cSBastien Nocera "Applying '180 degrees rotated screen' quirk\n"); 510ca96ea86SBastien Nocera } 511ca96ea86SBastien Nocera 512ca96ea86SBastien Nocera /** 513ca96ea86SBastien Nocera * goodix_read_version - Read goodix touchscreen version 514ca96ea86SBastien Nocera * 51568caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 516ca96ea86SBastien Nocera */ 51768caf858SIrina Tirdea static int goodix_read_version(struct goodix_ts_data *ts) 518ca96ea86SBastien Nocera { 519ca96ea86SBastien Nocera int error; 520ca96ea86SBastien Nocera u8 buf[6]; 521e70b0307SIrina Tirdea char id_str[5]; 522ca96ea86SBastien Nocera 52368caf858SIrina Tirdea error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf)); 524ca96ea86SBastien Nocera if (error) { 52568caf858SIrina Tirdea dev_err(&ts->client->dev, "read version failed: %d\n", error); 526ca96ea86SBastien Nocera return error; 527ca96ea86SBastien Nocera } 528ca96ea86SBastien Nocera 529e70b0307SIrina Tirdea memcpy(id_str, buf, 4); 530e70b0307SIrina Tirdea id_str[4] = 0; 53168caf858SIrina Tirdea if (kstrtou16(id_str, 10, &ts->id)) 53268caf858SIrina Tirdea ts->id = 0x1001; 533e70b0307SIrina Tirdea 53468caf858SIrina Tirdea ts->version = get_unaligned_le16(&buf[4]); 535ca96ea86SBastien Nocera 53668caf858SIrina Tirdea dev_info(&ts->client->dev, "ID %d, version: %04x\n", ts->id, 53768caf858SIrina Tirdea ts->version); 538ca96ea86SBastien Nocera 539ca96ea86SBastien Nocera return 0; 540ca96ea86SBastien Nocera } 541ca96ea86SBastien Nocera 542ca96ea86SBastien Nocera /** 543ca96ea86SBastien Nocera * goodix_i2c_test - I2C test function to check if the device answers. 544ca96ea86SBastien Nocera * 545ca96ea86SBastien Nocera * @client: the i2c client 546ca96ea86SBastien Nocera */ 547ca96ea86SBastien Nocera static int goodix_i2c_test(struct i2c_client *client) 548ca96ea86SBastien Nocera { 549ca96ea86SBastien Nocera int retry = 0; 550ca96ea86SBastien Nocera int error; 551ca96ea86SBastien Nocera u8 test; 552ca96ea86SBastien Nocera 553ca96ea86SBastien Nocera while (retry++ < 2) { 554ca96ea86SBastien Nocera error = goodix_i2c_read(client, GOODIX_REG_CONFIG_DATA, 555ca96ea86SBastien Nocera &test, 1); 556ca96ea86SBastien Nocera if (!error) 557ca96ea86SBastien Nocera return 0; 558ca96ea86SBastien Nocera 559ca96ea86SBastien Nocera dev_err(&client->dev, "i2c test failed attempt %d: %d\n", 560ca96ea86SBastien Nocera retry, error); 561ca96ea86SBastien Nocera msleep(20); 562ca96ea86SBastien Nocera } 563ca96ea86SBastien Nocera 564ca96ea86SBastien Nocera return error; 565ca96ea86SBastien Nocera } 566ca96ea86SBastien Nocera 567ca96ea86SBastien Nocera /** 568ca96ea86SBastien Nocera * goodix_request_input_dev - Allocate, populate and register the input device 569ca96ea86SBastien Nocera * 570ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 571ca96ea86SBastien Nocera * 572ca96ea86SBastien Nocera * Must be called during probe 573ca96ea86SBastien Nocera */ 57468caf858SIrina Tirdea static int goodix_request_input_dev(struct goodix_ts_data *ts) 575ca96ea86SBastien Nocera { 576ca96ea86SBastien Nocera int error; 577ca96ea86SBastien Nocera 578ca96ea86SBastien Nocera ts->input_dev = devm_input_allocate_device(&ts->client->dev); 579ca96ea86SBastien Nocera if (!ts->input_dev) { 580ca96ea86SBastien Nocera dev_err(&ts->client->dev, "Failed to allocate input device."); 581ca96ea86SBastien Nocera return -ENOMEM; 582ca96ea86SBastien Nocera } 583ca96ea86SBastien Nocera 5840dfb35bdSIrina Tirdea input_set_abs_params(ts->input_dev, ABS_MT_POSITION_X, 5850dfb35bdSIrina Tirdea 0, ts->abs_x_max, 0, 0); 5860dfb35bdSIrina Tirdea input_set_abs_params(ts->input_dev, ABS_MT_POSITION_Y, 5870dfb35bdSIrina Tirdea 0, ts->abs_y_max, 0, 0); 588ca96ea86SBastien Nocera input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 589ca96ea86SBastien Nocera input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 590ca96ea86SBastien Nocera 591a7ac7c95SAleksei Mamlin input_mt_init_slots(ts->input_dev, ts->max_touch_num, 592ca96ea86SBastien Nocera INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); 593ca96ea86SBastien Nocera 594ca96ea86SBastien Nocera ts->input_dev->name = "Goodix Capacitive TouchScreen"; 595ca96ea86SBastien Nocera ts->input_dev->phys = "input/ts"; 596ca96ea86SBastien Nocera ts->input_dev->id.bustype = BUS_I2C; 597ca96ea86SBastien Nocera ts->input_dev->id.vendor = 0x0416; 59868caf858SIrina Tirdea ts->input_dev->id.product = ts->id; 59968caf858SIrina Tirdea ts->input_dev->id.version = ts->version; 600ca96ea86SBastien Nocera 601ca96ea86SBastien Nocera error = input_register_device(ts->input_dev); 602ca96ea86SBastien Nocera if (error) { 603ca96ea86SBastien Nocera dev_err(&ts->client->dev, 604ca96ea86SBastien Nocera "Failed to register input device: %d", error); 605ca96ea86SBastien Nocera return error; 606ca96ea86SBastien Nocera } 607ca96ea86SBastien Nocera 608ca96ea86SBastien Nocera return 0; 609ca96ea86SBastien Nocera } 610ca96ea86SBastien Nocera 61168caf858SIrina Tirdea /** 61268caf858SIrina Tirdea * goodix_configure_dev - Finish device initialization 61368caf858SIrina Tirdea * 61468caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 61568caf858SIrina Tirdea * 61668caf858SIrina Tirdea * Must be called from probe to finish initialization of the device. 61768caf858SIrina Tirdea * Contains the common initialization code for both devices that 61868caf858SIrina Tirdea * declare gpio pins and devices that do not. It is either called 61968caf858SIrina Tirdea * directly from probe or from request_firmware_wait callback. 62068caf858SIrina Tirdea */ 62168caf858SIrina Tirdea static int goodix_configure_dev(struct goodix_ts_data *ts) 62268caf858SIrina Tirdea { 62368caf858SIrina Tirdea int error; 62468caf858SIrina Tirdea 62568caf858SIrina Tirdea goodix_read_config(ts); 62668caf858SIrina Tirdea 62768caf858SIrina Tirdea error = goodix_request_input_dev(ts); 62868caf858SIrina Tirdea if (error) 62968caf858SIrina Tirdea return error; 63068caf858SIrina Tirdea 6315ab09d6aSIrina Tirdea ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT; 6325ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 63368caf858SIrina Tirdea if (error) { 63468caf858SIrina Tirdea dev_err(&ts->client->dev, "request IRQ failed: %d\n", error); 63568caf858SIrina Tirdea return error; 63668caf858SIrina Tirdea } 63768caf858SIrina Tirdea 63868caf858SIrina Tirdea return 0; 63968caf858SIrina Tirdea } 64068caf858SIrina Tirdea 64168caf858SIrina Tirdea /** 64268caf858SIrina Tirdea * goodix_config_cb - Callback to finish device init 64368caf858SIrina Tirdea * 64468caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 64568caf858SIrina Tirdea * 64668caf858SIrina Tirdea * request_firmware_wait callback that finishes 64768caf858SIrina Tirdea * initialization of the device. 64868caf858SIrina Tirdea */ 64968caf858SIrina Tirdea static void goodix_config_cb(const struct firmware *cfg, void *ctx) 65068caf858SIrina Tirdea { 65168caf858SIrina Tirdea struct goodix_ts_data *ts = ctx; 65268caf858SIrina Tirdea int error; 65368caf858SIrina Tirdea 65468caf858SIrina Tirdea if (cfg) { 65568caf858SIrina Tirdea /* send device configuration to the firmware */ 65668caf858SIrina Tirdea error = goodix_send_cfg(ts, cfg); 65768caf858SIrina Tirdea if (error) 65868caf858SIrina Tirdea goto err_release_cfg; 65968caf858SIrina Tirdea } 66068caf858SIrina Tirdea 66168caf858SIrina Tirdea goodix_configure_dev(ts); 66268caf858SIrina Tirdea 66368caf858SIrina Tirdea err_release_cfg: 66468caf858SIrina Tirdea release_firmware(cfg); 66568caf858SIrina Tirdea complete_all(&ts->firmware_loading_complete); 66668caf858SIrina Tirdea } 66768caf858SIrina Tirdea 668ca96ea86SBastien Nocera static int goodix_ts_probe(struct i2c_client *client, 669ca96ea86SBastien Nocera const struct i2c_device_id *id) 670ca96ea86SBastien Nocera { 671ca96ea86SBastien Nocera struct goodix_ts_data *ts; 672ca96ea86SBastien Nocera int error; 673ca96ea86SBastien Nocera 674ca96ea86SBastien Nocera dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr); 675ca96ea86SBastien Nocera 676ca96ea86SBastien Nocera if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 677ca96ea86SBastien Nocera dev_err(&client->dev, "I2C check functionality failed.\n"); 678ca96ea86SBastien Nocera return -ENXIO; 679ca96ea86SBastien Nocera } 680ca96ea86SBastien Nocera 681ca96ea86SBastien Nocera ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); 682ca96ea86SBastien Nocera if (!ts) 683ca96ea86SBastien Nocera return -ENOMEM; 684ca96ea86SBastien Nocera 685ca96ea86SBastien Nocera ts->client = client; 686ca96ea86SBastien Nocera i2c_set_clientdata(client, ts); 68768caf858SIrina Tirdea init_completion(&ts->firmware_loading_complete); 688ca96ea86SBastien Nocera 689ec6e1b40SIrina Tirdea error = goodix_get_gpio_config(ts); 690ec6e1b40SIrina Tirdea if (error) 691ec6e1b40SIrina Tirdea return error; 692ec6e1b40SIrina Tirdea 693ec6e1b40SIrina Tirdea if (ts->gpiod_int && ts->gpiod_rst) { 694ec6e1b40SIrina Tirdea /* reset the controller */ 695ec6e1b40SIrina Tirdea error = goodix_reset(ts); 696ec6e1b40SIrina Tirdea if (error) { 697ec6e1b40SIrina Tirdea dev_err(&client->dev, "Controller reset failed.\n"); 698ec6e1b40SIrina Tirdea return error; 699ec6e1b40SIrina Tirdea } 700ec6e1b40SIrina Tirdea } 701ec6e1b40SIrina Tirdea 702ca96ea86SBastien Nocera error = goodix_i2c_test(client); 703ca96ea86SBastien Nocera if (error) { 704ca96ea86SBastien Nocera dev_err(&client->dev, "I2C communication failure: %d\n", error); 705ca96ea86SBastien Nocera return error; 706ca96ea86SBastien Nocera } 707ca96ea86SBastien Nocera 70868caf858SIrina Tirdea error = goodix_read_version(ts); 709ca96ea86SBastien Nocera if (error) { 710ca96ea86SBastien Nocera dev_err(&client->dev, "Read version failed.\n"); 711ca96ea86SBastien Nocera return error; 712ca96ea86SBastien Nocera } 713ca96ea86SBastien Nocera 71468caf858SIrina Tirdea ts->cfg_len = goodix_get_cfg_len(ts->id); 715a779fbc6SIrina Tirdea 71668caf858SIrina Tirdea if (ts->gpiod_int && ts->gpiod_rst) { 71768caf858SIrina Tirdea /* update device config */ 71868caf858SIrina Tirdea ts->cfg_name = devm_kasprintf(&client->dev, GFP_KERNEL, 71968caf858SIrina Tirdea "goodix_%d_cfg.bin", ts->id); 72068caf858SIrina Tirdea if (!ts->cfg_name) 72168caf858SIrina Tirdea return -ENOMEM; 722ca96ea86SBastien Nocera 72368caf858SIrina Tirdea error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name, 72468caf858SIrina Tirdea &client->dev, GFP_KERNEL, ts, 72568caf858SIrina Tirdea goodix_config_cb); 726ca96ea86SBastien Nocera if (error) { 72768caf858SIrina Tirdea dev_err(&client->dev, 72868caf858SIrina Tirdea "Failed to invoke firmware loader: %d\n", 72968caf858SIrina Tirdea error); 730ca96ea86SBastien Nocera return error; 731ca96ea86SBastien Nocera } 732ca96ea86SBastien Nocera 733ca96ea86SBastien Nocera return 0; 73468caf858SIrina Tirdea } else { 73568caf858SIrina Tirdea error = goodix_configure_dev(ts); 73668caf858SIrina Tirdea if (error) 73768caf858SIrina Tirdea return error; 73868caf858SIrina Tirdea } 73968caf858SIrina Tirdea 74068caf858SIrina Tirdea return 0; 74168caf858SIrina Tirdea } 74268caf858SIrina Tirdea 74368caf858SIrina Tirdea static int goodix_ts_remove(struct i2c_client *client) 74468caf858SIrina Tirdea { 74568caf858SIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 74668caf858SIrina Tirdea 74768caf858SIrina Tirdea if (ts->gpiod_int && ts->gpiod_rst) 74868caf858SIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 74968caf858SIrina Tirdea 75068caf858SIrina Tirdea return 0; 751ca96ea86SBastien Nocera } 752ca96ea86SBastien Nocera 7535ab09d6aSIrina Tirdea static int __maybe_unused goodix_suspend(struct device *dev) 7545ab09d6aSIrina Tirdea { 7555ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 7565ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 7575ab09d6aSIrina Tirdea int error; 7585ab09d6aSIrina Tirdea 7595ab09d6aSIrina Tirdea /* We need gpio pins to suspend/resume */ 7605ab09d6aSIrina Tirdea if (!ts->gpiod_int || !ts->gpiod_rst) 7615ab09d6aSIrina Tirdea return 0; 7625ab09d6aSIrina Tirdea 7635ab09d6aSIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 7645ab09d6aSIrina Tirdea 7655ab09d6aSIrina Tirdea /* Free IRQ as IRQ pin is used as output in the suspend sequence */ 7665ab09d6aSIrina Tirdea goodix_free_irq(ts); 7675ab09d6aSIrina Tirdea 7685ab09d6aSIrina Tirdea /* Output LOW on the INT pin for 5 ms */ 7695ab09d6aSIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, 0); 7705ab09d6aSIrina Tirdea if (error) { 7715ab09d6aSIrina Tirdea goodix_request_irq(ts); 7725ab09d6aSIrina Tirdea return error; 7735ab09d6aSIrina Tirdea } 7745ab09d6aSIrina Tirdea 7755ab09d6aSIrina Tirdea usleep_range(5000, 6000); 7765ab09d6aSIrina Tirdea 7775ab09d6aSIrina Tirdea error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND, 7785ab09d6aSIrina Tirdea GOODIX_CMD_SCREEN_OFF); 7795ab09d6aSIrina Tirdea if (error) { 7805ab09d6aSIrina Tirdea dev_err(&ts->client->dev, "Screen off command failed\n"); 7815ab09d6aSIrina Tirdea gpiod_direction_input(ts->gpiod_int); 7825ab09d6aSIrina Tirdea goodix_request_irq(ts); 7835ab09d6aSIrina Tirdea return -EAGAIN; 7845ab09d6aSIrina Tirdea } 7855ab09d6aSIrina Tirdea 7865ab09d6aSIrina Tirdea /* 7875ab09d6aSIrina Tirdea * The datasheet specifies that the interval between sending screen-off 7885ab09d6aSIrina Tirdea * command and wake-up should be longer than 58 ms. To avoid waking up 7895ab09d6aSIrina Tirdea * sooner, delay 58ms here. 7905ab09d6aSIrina Tirdea */ 7915ab09d6aSIrina Tirdea msleep(58); 7925ab09d6aSIrina Tirdea return 0; 7935ab09d6aSIrina Tirdea } 7945ab09d6aSIrina Tirdea 7955ab09d6aSIrina Tirdea static int __maybe_unused goodix_resume(struct device *dev) 7965ab09d6aSIrina Tirdea { 7975ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 7985ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 7995ab09d6aSIrina Tirdea int error; 8005ab09d6aSIrina Tirdea 8015ab09d6aSIrina Tirdea if (!ts->gpiod_int || !ts->gpiod_rst) 8025ab09d6aSIrina Tirdea return 0; 8035ab09d6aSIrina Tirdea 8045ab09d6aSIrina Tirdea /* 8055ab09d6aSIrina Tirdea * Exit sleep mode by outputting HIGH level to INT pin 8065ab09d6aSIrina Tirdea * for 2ms~5ms. 8075ab09d6aSIrina Tirdea */ 8085ab09d6aSIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, 1); 8095ab09d6aSIrina Tirdea if (error) 8105ab09d6aSIrina Tirdea return error; 8115ab09d6aSIrina Tirdea 8125ab09d6aSIrina Tirdea usleep_range(2000, 5000); 8135ab09d6aSIrina Tirdea 8145ab09d6aSIrina Tirdea error = goodix_int_sync(ts); 8155ab09d6aSIrina Tirdea if (error) 8165ab09d6aSIrina Tirdea return error; 8175ab09d6aSIrina Tirdea 8185ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 8195ab09d6aSIrina Tirdea if (error) 8205ab09d6aSIrina Tirdea return error; 8215ab09d6aSIrina Tirdea 8225ab09d6aSIrina Tirdea return 0; 8235ab09d6aSIrina Tirdea } 8245ab09d6aSIrina Tirdea 8255ab09d6aSIrina Tirdea static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume); 8265ab09d6aSIrina Tirdea 827ca96ea86SBastien Nocera static const struct i2c_device_id goodix_ts_id[] = { 828ca96ea86SBastien Nocera { "GDIX1001:00", 0 }, 829ca96ea86SBastien Nocera { } 830ca96ea86SBastien Nocera }; 8312e9e910eSJavier Martinez Canillas MODULE_DEVICE_TABLE(i2c, goodix_ts_id); 832ca96ea86SBastien Nocera 833771d8f1bSAleksei Mamlin #ifdef CONFIG_ACPI 834ca96ea86SBastien Nocera static const struct acpi_device_id goodix_acpi_match[] = { 835ca96ea86SBastien Nocera { "GDIX1001", 0 }, 836ca96ea86SBastien Nocera { } 837ca96ea86SBastien Nocera }; 838ca96ea86SBastien Nocera MODULE_DEVICE_TABLE(acpi, goodix_acpi_match); 839771d8f1bSAleksei Mamlin #endif 840771d8f1bSAleksei Mamlin 841771d8f1bSAleksei Mamlin #ifdef CONFIG_OF 842771d8f1bSAleksei Mamlin static const struct of_device_id goodix_of_match[] = { 843771d8f1bSAleksei Mamlin { .compatible = "goodix,gt911" }, 844771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9110" }, 845771d8f1bSAleksei Mamlin { .compatible = "goodix,gt912" }, 846771d8f1bSAleksei Mamlin { .compatible = "goodix,gt927" }, 847771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9271" }, 848771d8f1bSAleksei Mamlin { .compatible = "goodix,gt928" }, 849771d8f1bSAleksei Mamlin { .compatible = "goodix,gt967" }, 850771d8f1bSAleksei Mamlin { } 851771d8f1bSAleksei Mamlin }; 852771d8f1bSAleksei Mamlin MODULE_DEVICE_TABLE(of, goodix_of_match); 853771d8f1bSAleksei Mamlin #endif 854ca96ea86SBastien Nocera 855ca96ea86SBastien Nocera static struct i2c_driver goodix_ts_driver = { 856ca96ea86SBastien Nocera .probe = goodix_ts_probe, 85768caf858SIrina Tirdea .remove = goodix_ts_remove, 858ca96ea86SBastien Nocera .id_table = goodix_ts_id, 859ca96ea86SBastien Nocera .driver = { 860ca96ea86SBastien Nocera .name = "Goodix-TS", 861771d8f1bSAleksei Mamlin .acpi_match_table = ACPI_PTR(goodix_acpi_match), 862771d8f1bSAleksei Mamlin .of_match_table = of_match_ptr(goodix_of_match), 8635ab09d6aSIrina Tirdea .pm = &goodix_pm_ops, 864ca96ea86SBastien Nocera }, 865ca96ea86SBastien Nocera }; 866ca96ea86SBastien Nocera module_i2c_driver(goodix_ts_driver); 867ca96ea86SBastien Nocera 868ca96ea86SBastien Nocera MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); 869ca96ea86SBastien Nocera MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>"); 870ca96ea86SBastien Nocera MODULE_DESCRIPTION("Goodix touchscreen driver"); 871ca96ea86SBastien Nocera MODULE_LICENSE("GPL v2"); 872