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 static const u8 end_cmd[] = { 281ca96ea86SBastien Nocera GOODIX_READ_COOR_ADDR >> 8, 282ca96ea86SBastien Nocera GOODIX_READ_COOR_ADDR & 0xff, 283ca96ea86SBastien Nocera 0 284ca96ea86SBastien Nocera }; 285ca96ea86SBastien Nocera struct goodix_ts_data *ts = dev_id; 286ca96ea86SBastien Nocera 287ca96ea86SBastien Nocera goodix_process_events(ts); 288ca96ea86SBastien Nocera 289ca96ea86SBastien Nocera if (i2c_master_send(ts->client, end_cmd, sizeof(end_cmd)) < 0) 290ca96ea86SBastien Nocera dev_err(&ts->client->dev, "I2C write end_cmd error\n"); 291ca96ea86SBastien Nocera 292ca96ea86SBastien Nocera return IRQ_HANDLED; 293ca96ea86SBastien Nocera } 294ca96ea86SBastien Nocera 2955ab09d6aSIrina Tirdea static void goodix_free_irq(struct goodix_ts_data *ts) 2965ab09d6aSIrina Tirdea { 2975ab09d6aSIrina Tirdea devm_free_irq(&ts->client->dev, ts->client->irq, ts); 2985ab09d6aSIrina Tirdea } 2995ab09d6aSIrina Tirdea 3005ab09d6aSIrina Tirdea static int goodix_request_irq(struct goodix_ts_data *ts) 3015ab09d6aSIrina Tirdea { 3025ab09d6aSIrina Tirdea return devm_request_threaded_irq(&ts->client->dev, ts->client->irq, 3035ab09d6aSIrina Tirdea NULL, goodix_ts_irq_handler, 3045ab09d6aSIrina Tirdea ts->irq_flags, ts->client->name, ts); 3055ab09d6aSIrina Tirdea } 3065ab09d6aSIrina Tirdea 30768caf858SIrina Tirdea /** 30868caf858SIrina Tirdea * goodix_check_cfg - Checks if config fw is valid 30968caf858SIrina Tirdea * 31068caf858SIrina Tirdea * @ts: goodix_ts_data pointer 31168caf858SIrina Tirdea * @cfg: firmware config data 31268caf858SIrina Tirdea */ 31368caf858SIrina Tirdea static int goodix_check_cfg(struct goodix_ts_data *ts, 31468caf858SIrina Tirdea const struct firmware *cfg) 31568caf858SIrina Tirdea { 31668caf858SIrina Tirdea int i, raw_cfg_len; 31768caf858SIrina Tirdea u8 check_sum = 0; 31868caf858SIrina Tirdea 31968caf858SIrina Tirdea if (cfg->size > GOODIX_CONFIG_MAX_LENGTH) { 32068caf858SIrina Tirdea dev_err(&ts->client->dev, 32168caf858SIrina Tirdea "The length of the config fw is not correct"); 32268caf858SIrina Tirdea return -EINVAL; 32368caf858SIrina Tirdea } 32468caf858SIrina Tirdea 32568caf858SIrina Tirdea raw_cfg_len = cfg->size - 2; 32668caf858SIrina Tirdea for (i = 0; i < raw_cfg_len; i++) 32768caf858SIrina Tirdea check_sum += cfg->data[i]; 32868caf858SIrina Tirdea check_sum = (~check_sum) + 1; 32968caf858SIrina Tirdea if (check_sum != cfg->data[raw_cfg_len]) { 33068caf858SIrina Tirdea dev_err(&ts->client->dev, 33168caf858SIrina Tirdea "The checksum of the config fw is not correct"); 33268caf858SIrina Tirdea return -EINVAL; 33368caf858SIrina Tirdea } 33468caf858SIrina Tirdea 33568caf858SIrina Tirdea if (cfg->data[raw_cfg_len + 1] != 1) { 33668caf858SIrina Tirdea dev_err(&ts->client->dev, 33768caf858SIrina Tirdea "Config fw must have Config_Fresh register set"); 33868caf858SIrina Tirdea return -EINVAL; 33968caf858SIrina Tirdea } 34068caf858SIrina Tirdea 34168caf858SIrina Tirdea return 0; 34268caf858SIrina Tirdea } 34368caf858SIrina Tirdea 34468caf858SIrina Tirdea /** 34568caf858SIrina Tirdea * goodix_send_cfg - Write fw config to device 34668caf858SIrina Tirdea * 34768caf858SIrina Tirdea * @ts: goodix_ts_data pointer 34868caf858SIrina Tirdea * @cfg: config firmware to write to device 34968caf858SIrina Tirdea */ 35068caf858SIrina Tirdea static int goodix_send_cfg(struct goodix_ts_data *ts, 35168caf858SIrina Tirdea const struct firmware *cfg) 35268caf858SIrina Tirdea { 35368caf858SIrina Tirdea int error; 35468caf858SIrina Tirdea 35568caf858SIrina Tirdea error = goodix_check_cfg(ts, cfg); 35668caf858SIrina Tirdea if (error) 35768caf858SIrina Tirdea return error; 35868caf858SIrina Tirdea 35968caf858SIrina Tirdea error = goodix_i2c_write(ts->client, GOODIX_REG_CONFIG_DATA, cfg->data, 36068caf858SIrina Tirdea cfg->size); 36168caf858SIrina Tirdea if (error) { 36268caf858SIrina Tirdea dev_err(&ts->client->dev, "Failed to write config data: %d", 36368caf858SIrina Tirdea error); 36468caf858SIrina Tirdea return error; 36568caf858SIrina Tirdea } 36668caf858SIrina Tirdea dev_dbg(&ts->client->dev, "Config sent successfully."); 36768caf858SIrina Tirdea 36868caf858SIrina Tirdea /* Let the firmware reconfigure itself, so sleep for 10ms */ 36968caf858SIrina Tirdea usleep_range(10000, 11000); 37068caf858SIrina Tirdea 37168caf858SIrina Tirdea return 0; 37268caf858SIrina Tirdea } 37368caf858SIrina Tirdea 374ec6e1b40SIrina Tirdea static int goodix_int_sync(struct goodix_ts_data *ts) 375ec6e1b40SIrina Tirdea { 376ec6e1b40SIrina Tirdea int error; 377ec6e1b40SIrina Tirdea 378ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, 0); 379ec6e1b40SIrina Tirdea if (error) 380ec6e1b40SIrina Tirdea return error; 381ec6e1b40SIrina Tirdea 382ec6e1b40SIrina Tirdea msleep(50); /* T5: 50ms */ 383ec6e1b40SIrina Tirdea 384ec6e1b40SIrina Tirdea error = gpiod_direction_input(ts->gpiod_int); 385ec6e1b40SIrina Tirdea if (error) 386ec6e1b40SIrina Tirdea return error; 387ec6e1b40SIrina Tirdea 388ec6e1b40SIrina Tirdea return 0; 389ec6e1b40SIrina Tirdea } 390ec6e1b40SIrina Tirdea 391ec6e1b40SIrina Tirdea /** 392ec6e1b40SIrina Tirdea * goodix_reset - Reset device during power on 393ec6e1b40SIrina Tirdea * 394ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 395ec6e1b40SIrina Tirdea */ 396ec6e1b40SIrina Tirdea static int goodix_reset(struct goodix_ts_data *ts) 397ec6e1b40SIrina Tirdea { 398ec6e1b40SIrina Tirdea int error; 399ec6e1b40SIrina Tirdea 400ec6e1b40SIrina Tirdea /* begin select I2C slave addr */ 401ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 0); 402ec6e1b40SIrina Tirdea if (error) 403ec6e1b40SIrina Tirdea return error; 404ec6e1b40SIrina Tirdea 405ec6e1b40SIrina Tirdea msleep(20); /* T2: > 10ms */ 406ec6e1b40SIrina Tirdea 407ec6e1b40SIrina Tirdea /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */ 408ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, ts->client->addr == 0x14); 409ec6e1b40SIrina Tirdea if (error) 410ec6e1b40SIrina Tirdea return error; 411ec6e1b40SIrina Tirdea 412ec6e1b40SIrina Tirdea usleep_range(100, 2000); /* T3: > 100us */ 413ec6e1b40SIrina Tirdea 414ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 1); 415ec6e1b40SIrina Tirdea if (error) 416ec6e1b40SIrina Tirdea return error; 417ec6e1b40SIrina Tirdea 418ec6e1b40SIrina Tirdea usleep_range(6000, 10000); /* T4: > 5ms */ 419ec6e1b40SIrina Tirdea 420ec6e1b40SIrina Tirdea /* end select I2C slave addr */ 421ec6e1b40SIrina Tirdea error = gpiod_direction_input(ts->gpiod_rst); 422ec6e1b40SIrina Tirdea if (error) 423ec6e1b40SIrina Tirdea return error; 424ec6e1b40SIrina Tirdea 425ec6e1b40SIrina Tirdea error = goodix_int_sync(ts); 426ec6e1b40SIrina Tirdea if (error) 427ec6e1b40SIrina Tirdea return error; 428ec6e1b40SIrina Tirdea 429ec6e1b40SIrina Tirdea return 0; 430ec6e1b40SIrina Tirdea } 431ec6e1b40SIrina Tirdea 432ec6e1b40SIrina Tirdea /** 433ec6e1b40SIrina Tirdea * goodix_get_gpio_config - Get GPIO config from ACPI/DT 434ec6e1b40SIrina Tirdea * 435ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 436ec6e1b40SIrina Tirdea */ 437ec6e1b40SIrina Tirdea static int goodix_get_gpio_config(struct goodix_ts_data *ts) 438ec6e1b40SIrina Tirdea { 439ec6e1b40SIrina Tirdea int error; 440ec6e1b40SIrina Tirdea struct device *dev; 441ec6e1b40SIrina Tirdea struct gpio_desc *gpiod; 442ec6e1b40SIrina Tirdea 443ec6e1b40SIrina Tirdea if (!ts->client) 444ec6e1b40SIrina Tirdea return -EINVAL; 445ec6e1b40SIrina Tirdea dev = &ts->client->dev; 446ec6e1b40SIrina Tirdea 447ec6e1b40SIrina Tirdea /* Get the interrupt GPIO pin number */ 448ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN); 449ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 450ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 451ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 452ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 453ec6e1b40SIrina Tirdea GOODIX_GPIO_INT_NAME, error); 454ec6e1b40SIrina Tirdea return error; 455ec6e1b40SIrina Tirdea } 456ec6e1b40SIrina Tirdea 457ec6e1b40SIrina Tirdea ts->gpiod_int = gpiod; 458ec6e1b40SIrina Tirdea 459ec6e1b40SIrina Tirdea /* Get the reset line GPIO pin number */ 460ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, GPIOD_IN); 461ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 462ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 463ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 464ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 465ec6e1b40SIrina Tirdea GOODIX_GPIO_RST_NAME, error); 466ec6e1b40SIrina Tirdea return error; 467ec6e1b40SIrina Tirdea } 468ec6e1b40SIrina Tirdea 469ec6e1b40SIrina Tirdea ts->gpiod_rst = gpiod; 470ec6e1b40SIrina Tirdea 471ec6e1b40SIrina Tirdea return 0; 472ec6e1b40SIrina Tirdea } 473ec6e1b40SIrina Tirdea 474ca96ea86SBastien Nocera /** 475ca96ea86SBastien Nocera * goodix_read_config - Read the embedded configuration of the panel 476ca96ea86SBastien Nocera * 477ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 478ca96ea86SBastien Nocera * 479ca96ea86SBastien Nocera * Must be called during probe 480ca96ea86SBastien Nocera */ 481ca96ea86SBastien Nocera static void goodix_read_config(struct goodix_ts_data *ts) 482ca96ea86SBastien Nocera { 483ca96ea86SBastien Nocera u8 config[GOODIX_CONFIG_MAX_LENGTH]; 484ca96ea86SBastien Nocera int error; 485ca96ea86SBastien Nocera 486ca96ea86SBastien Nocera error = goodix_i2c_read(ts->client, GOODIX_REG_CONFIG_DATA, 487a779fbc6SIrina Tirdea config, ts->cfg_len); 488ca96ea86SBastien Nocera if (error) { 489ca96ea86SBastien Nocera dev_warn(&ts->client->dev, 490ca96ea86SBastien Nocera "Error reading config (%d), using defaults\n", 491ca96ea86SBastien Nocera error); 492ca96ea86SBastien Nocera ts->abs_x_max = GOODIX_MAX_WIDTH; 493ca96ea86SBastien Nocera ts->abs_y_max = GOODIX_MAX_HEIGHT; 494ca96ea86SBastien Nocera ts->int_trigger_type = GOODIX_INT_TRIGGER; 495a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 496ca96ea86SBastien Nocera return; 497ca96ea86SBastien Nocera } 498ca96ea86SBastien Nocera 499ca96ea86SBastien Nocera ts->abs_x_max = get_unaligned_le16(&config[RESOLUTION_LOC]); 500ca96ea86SBastien Nocera ts->abs_y_max = get_unaligned_le16(&config[RESOLUTION_LOC + 2]); 501a7ac7c95SAleksei Mamlin ts->int_trigger_type = config[TRIGGER_LOC] & 0x03; 502a7ac7c95SAleksei Mamlin ts->max_touch_num = config[MAX_CONTACTS_LOC] & 0x0f; 503a7ac7c95SAleksei Mamlin if (!ts->abs_x_max || !ts->abs_y_max || !ts->max_touch_num) { 504ca96ea86SBastien Nocera dev_err(&ts->client->dev, 505ca96ea86SBastien Nocera "Invalid config, using defaults\n"); 506ca96ea86SBastien Nocera ts->abs_x_max = GOODIX_MAX_WIDTH; 507ca96ea86SBastien Nocera ts->abs_y_max = GOODIX_MAX_HEIGHT; 508a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 509ca96ea86SBastien Nocera } 5108b5a359cSBastien Nocera 5118b5a359cSBastien Nocera ts->rotated_screen = dmi_check_system(rotated_screen); 5128b5a359cSBastien Nocera if (ts->rotated_screen) 5138b5a359cSBastien Nocera dev_dbg(&ts->client->dev, 5148b5a359cSBastien Nocera "Applying '180 degrees rotated screen' quirk\n"); 515ca96ea86SBastien Nocera } 516ca96ea86SBastien Nocera 517ca96ea86SBastien Nocera /** 518ca96ea86SBastien Nocera * goodix_read_version - Read goodix touchscreen version 519ca96ea86SBastien Nocera * 52068caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 521ca96ea86SBastien Nocera */ 52268caf858SIrina Tirdea static int goodix_read_version(struct goodix_ts_data *ts) 523ca96ea86SBastien Nocera { 524ca96ea86SBastien Nocera int error; 525ca96ea86SBastien Nocera u8 buf[6]; 526e70b0307SIrina Tirdea char id_str[5]; 527ca96ea86SBastien Nocera 52868caf858SIrina Tirdea error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf)); 529ca96ea86SBastien Nocera if (error) { 53068caf858SIrina Tirdea dev_err(&ts->client->dev, "read version failed: %d\n", error); 531ca96ea86SBastien Nocera return error; 532ca96ea86SBastien Nocera } 533ca96ea86SBastien Nocera 534e70b0307SIrina Tirdea memcpy(id_str, buf, 4); 535e70b0307SIrina Tirdea id_str[4] = 0; 53668caf858SIrina Tirdea if (kstrtou16(id_str, 10, &ts->id)) 53768caf858SIrina Tirdea ts->id = 0x1001; 538e70b0307SIrina Tirdea 53968caf858SIrina Tirdea ts->version = get_unaligned_le16(&buf[4]); 540ca96ea86SBastien Nocera 54168caf858SIrina Tirdea dev_info(&ts->client->dev, "ID %d, version: %04x\n", ts->id, 54268caf858SIrina Tirdea ts->version); 543ca96ea86SBastien Nocera 544ca96ea86SBastien Nocera return 0; 545ca96ea86SBastien Nocera } 546ca96ea86SBastien Nocera 547ca96ea86SBastien Nocera /** 548ca96ea86SBastien Nocera * goodix_i2c_test - I2C test function to check if the device answers. 549ca96ea86SBastien Nocera * 550ca96ea86SBastien Nocera * @client: the i2c client 551ca96ea86SBastien Nocera */ 552ca96ea86SBastien Nocera static int goodix_i2c_test(struct i2c_client *client) 553ca96ea86SBastien Nocera { 554ca96ea86SBastien Nocera int retry = 0; 555ca96ea86SBastien Nocera int error; 556ca96ea86SBastien Nocera u8 test; 557ca96ea86SBastien Nocera 558ca96ea86SBastien Nocera while (retry++ < 2) { 559ca96ea86SBastien Nocera error = goodix_i2c_read(client, GOODIX_REG_CONFIG_DATA, 560ca96ea86SBastien Nocera &test, 1); 561ca96ea86SBastien Nocera if (!error) 562ca96ea86SBastien Nocera return 0; 563ca96ea86SBastien Nocera 564ca96ea86SBastien Nocera dev_err(&client->dev, "i2c test failed attempt %d: %d\n", 565ca96ea86SBastien Nocera retry, error); 566ca96ea86SBastien Nocera msleep(20); 567ca96ea86SBastien Nocera } 568ca96ea86SBastien Nocera 569ca96ea86SBastien Nocera return error; 570ca96ea86SBastien Nocera } 571ca96ea86SBastien Nocera 572ca96ea86SBastien Nocera /** 573ca96ea86SBastien Nocera * goodix_request_input_dev - Allocate, populate and register the input device 574ca96ea86SBastien Nocera * 575ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 576ca96ea86SBastien Nocera * 577ca96ea86SBastien Nocera * Must be called during probe 578ca96ea86SBastien Nocera */ 57968caf858SIrina Tirdea static int goodix_request_input_dev(struct goodix_ts_data *ts) 580ca96ea86SBastien Nocera { 581ca96ea86SBastien Nocera int error; 582ca96ea86SBastien Nocera 583ca96ea86SBastien Nocera ts->input_dev = devm_input_allocate_device(&ts->client->dev); 584ca96ea86SBastien Nocera if (!ts->input_dev) { 585ca96ea86SBastien Nocera dev_err(&ts->client->dev, "Failed to allocate input device."); 586ca96ea86SBastien Nocera return -ENOMEM; 587ca96ea86SBastien Nocera } 588ca96ea86SBastien Nocera 5890dfb35bdSIrina Tirdea input_set_abs_params(ts->input_dev, ABS_MT_POSITION_X, 5900dfb35bdSIrina Tirdea 0, ts->abs_x_max, 0, 0); 5910dfb35bdSIrina Tirdea input_set_abs_params(ts->input_dev, ABS_MT_POSITION_Y, 5920dfb35bdSIrina Tirdea 0, ts->abs_y_max, 0, 0); 593ca96ea86SBastien Nocera input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 594ca96ea86SBastien Nocera input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 595ca96ea86SBastien Nocera 596a7ac7c95SAleksei Mamlin input_mt_init_slots(ts->input_dev, ts->max_touch_num, 597ca96ea86SBastien Nocera INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); 598ca96ea86SBastien Nocera 599ca96ea86SBastien Nocera ts->input_dev->name = "Goodix Capacitive TouchScreen"; 600ca96ea86SBastien Nocera ts->input_dev->phys = "input/ts"; 601ca96ea86SBastien Nocera ts->input_dev->id.bustype = BUS_I2C; 602ca96ea86SBastien Nocera ts->input_dev->id.vendor = 0x0416; 60368caf858SIrina Tirdea ts->input_dev->id.product = ts->id; 60468caf858SIrina Tirdea ts->input_dev->id.version = ts->version; 605ca96ea86SBastien Nocera 606ca96ea86SBastien Nocera error = input_register_device(ts->input_dev); 607ca96ea86SBastien Nocera if (error) { 608ca96ea86SBastien Nocera dev_err(&ts->client->dev, 609ca96ea86SBastien Nocera "Failed to register input device: %d", error); 610ca96ea86SBastien Nocera return error; 611ca96ea86SBastien Nocera } 612ca96ea86SBastien Nocera 613ca96ea86SBastien Nocera return 0; 614ca96ea86SBastien Nocera } 615ca96ea86SBastien Nocera 61668caf858SIrina Tirdea /** 61768caf858SIrina Tirdea * goodix_configure_dev - Finish device initialization 61868caf858SIrina Tirdea * 61968caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 62068caf858SIrina Tirdea * 62168caf858SIrina Tirdea * Must be called from probe to finish initialization of the device. 62268caf858SIrina Tirdea * Contains the common initialization code for both devices that 62368caf858SIrina Tirdea * declare gpio pins and devices that do not. It is either called 62468caf858SIrina Tirdea * directly from probe or from request_firmware_wait callback. 62568caf858SIrina Tirdea */ 62668caf858SIrina Tirdea static int goodix_configure_dev(struct goodix_ts_data *ts) 62768caf858SIrina Tirdea { 62868caf858SIrina Tirdea int error; 62968caf858SIrina Tirdea 63068caf858SIrina Tirdea goodix_read_config(ts); 63168caf858SIrina Tirdea 63268caf858SIrina Tirdea error = goodix_request_input_dev(ts); 63368caf858SIrina Tirdea if (error) 63468caf858SIrina Tirdea return error; 63568caf858SIrina Tirdea 6365ab09d6aSIrina Tirdea ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT; 6375ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 63868caf858SIrina Tirdea if (error) { 63968caf858SIrina Tirdea dev_err(&ts->client->dev, "request IRQ failed: %d\n", error); 64068caf858SIrina Tirdea return error; 64168caf858SIrina Tirdea } 64268caf858SIrina Tirdea 64368caf858SIrina Tirdea return 0; 64468caf858SIrina Tirdea } 64568caf858SIrina Tirdea 64668caf858SIrina Tirdea /** 64768caf858SIrina Tirdea * goodix_config_cb - Callback to finish device init 64868caf858SIrina Tirdea * 64968caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 65068caf858SIrina Tirdea * 65168caf858SIrina Tirdea * request_firmware_wait callback that finishes 65268caf858SIrina Tirdea * initialization of the device. 65368caf858SIrina Tirdea */ 65468caf858SIrina Tirdea static void goodix_config_cb(const struct firmware *cfg, void *ctx) 65568caf858SIrina Tirdea { 65668caf858SIrina Tirdea struct goodix_ts_data *ts = ctx; 65768caf858SIrina Tirdea int error; 65868caf858SIrina Tirdea 65968caf858SIrina Tirdea if (cfg) { 66068caf858SIrina Tirdea /* send device configuration to the firmware */ 66168caf858SIrina Tirdea error = goodix_send_cfg(ts, cfg); 66268caf858SIrina Tirdea if (error) 66368caf858SIrina Tirdea goto err_release_cfg; 66468caf858SIrina Tirdea } 66568caf858SIrina Tirdea 66668caf858SIrina Tirdea goodix_configure_dev(ts); 66768caf858SIrina Tirdea 66868caf858SIrina Tirdea err_release_cfg: 66968caf858SIrina Tirdea release_firmware(cfg); 67068caf858SIrina Tirdea complete_all(&ts->firmware_loading_complete); 67168caf858SIrina Tirdea } 67268caf858SIrina Tirdea 673ca96ea86SBastien Nocera static int goodix_ts_probe(struct i2c_client *client, 674ca96ea86SBastien Nocera const struct i2c_device_id *id) 675ca96ea86SBastien Nocera { 676ca96ea86SBastien Nocera struct goodix_ts_data *ts; 677ca96ea86SBastien Nocera int error; 678ca96ea86SBastien Nocera 679ca96ea86SBastien Nocera dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr); 680ca96ea86SBastien Nocera 681ca96ea86SBastien Nocera if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 682ca96ea86SBastien Nocera dev_err(&client->dev, "I2C check functionality failed.\n"); 683ca96ea86SBastien Nocera return -ENXIO; 684ca96ea86SBastien Nocera } 685ca96ea86SBastien Nocera 686ca96ea86SBastien Nocera ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); 687ca96ea86SBastien Nocera if (!ts) 688ca96ea86SBastien Nocera return -ENOMEM; 689ca96ea86SBastien Nocera 690ca96ea86SBastien Nocera ts->client = client; 691ca96ea86SBastien Nocera i2c_set_clientdata(client, ts); 69268caf858SIrina Tirdea init_completion(&ts->firmware_loading_complete); 693ca96ea86SBastien Nocera 694ec6e1b40SIrina Tirdea error = goodix_get_gpio_config(ts); 695ec6e1b40SIrina Tirdea if (error) 696ec6e1b40SIrina Tirdea return error; 697ec6e1b40SIrina Tirdea 698ec6e1b40SIrina Tirdea if (ts->gpiod_int && ts->gpiod_rst) { 699ec6e1b40SIrina Tirdea /* reset the controller */ 700ec6e1b40SIrina Tirdea error = goodix_reset(ts); 701ec6e1b40SIrina Tirdea if (error) { 702ec6e1b40SIrina Tirdea dev_err(&client->dev, "Controller reset failed.\n"); 703ec6e1b40SIrina Tirdea return error; 704ec6e1b40SIrina Tirdea } 705ec6e1b40SIrina Tirdea } 706ec6e1b40SIrina Tirdea 707ca96ea86SBastien Nocera error = goodix_i2c_test(client); 708ca96ea86SBastien Nocera if (error) { 709ca96ea86SBastien Nocera dev_err(&client->dev, "I2C communication failure: %d\n", error); 710ca96ea86SBastien Nocera return error; 711ca96ea86SBastien Nocera } 712ca96ea86SBastien Nocera 71368caf858SIrina Tirdea error = goodix_read_version(ts); 714ca96ea86SBastien Nocera if (error) { 715ca96ea86SBastien Nocera dev_err(&client->dev, "Read version failed.\n"); 716ca96ea86SBastien Nocera return error; 717ca96ea86SBastien Nocera } 718ca96ea86SBastien Nocera 71968caf858SIrina Tirdea ts->cfg_len = goodix_get_cfg_len(ts->id); 720a779fbc6SIrina Tirdea 72168caf858SIrina Tirdea if (ts->gpiod_int && ts->gpiod_rst) { 72268caf858SIrina Tirdea /* update device config */ 72368caf858SIrina Tirdea ts->cfg_name = devm_kasprintf(&client->dev, GFP_KERNEL, 72468caf858SIrina Tirdea "goodix_%d_cfg.bin", ts->id); 72568caf858SIrina Tirdea if (!ts->cfg_name) 72668caf858SIrina Tirdea return -ENOMEM; 727ca96ea86SBastien Nocera 72868caf858SIrina Tirdea error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name, 72968caf858SIrina Tirdea &client->dev, GFP_KERNEL, ts, 73068caf858SIrina Tirdea goodix_config_cb); 731ca96ea86SBastien Nocera if (error) { 73268caf858SIrina Tirdea dev_err(&client->dev, 73368caf858SIrina Tirdea "Failed to invoke firmware loader: %d\n", 73468caf858SIrina Tirdea error); 735ca96ea86SBastien Nocera return error; 736ca96ea86SBastien Nocera } 737ca96ea86SBastien Nocera 738ca96ea86SBastien Nocera return 0; 73968caf858SIrina Tirdea } else { 74068caf858SIrina Tirdea error = goodix_configure_dev(ts); 74168caf858SIrina Tirdea if (error) 74268caf858SIrina Tirdea return error; 74368caf858SIrina Tirdea } 74468caf858SIrina Tirdea 74568caf858SIrina Tirdea return 0; 74668caf858SIrina Tirdea } 74768caf858SIrina Tirdea 74868caf858SIrina Tirdea static int goodix_ts_remove(struct i2c_client *client) 74968caf858SIrina Tirdea { 75068caf858SIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 75168caf858SIrina Tirdea 75268caf858SIrina Tirdea if (ts->gpiod_int && ts->gpiod_rst) 75368caf858SIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 75468caf858SIrina Tirdea 75568caf858SIrina Tirdea return 0; 756ca96ea86SBastien Nocera } 757ca96ea86SBastien Nocera 7585ab09d6aSIrina Tirdea static int __maybe_unused goodix_suspend(struct device *dev) 7595ab09d6aSIrina Tirdea { 7605ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 7615ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 7625ab09d6aSIrina Tirdea int error; 7635ab09d6aSIrina Tirdea 7645ab09d6aSIrina Tirdea /* We need gpio pins to suspend/resume */ 7655ab09d6aSIrina Tirdea if (!ts->gpiod_int || !ts->gpiod_rst) 7665ab09d6aSIrina Tirdea return 0; 7675ab09d6aSIrina Tirdea 7685ab09d6aSIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 7695ab09d6aSIrina Tirdea 7705ab09d6aSIrina Tirdea /* Free IRQ as IRQ pin is used as output in the suspend sequence */ 7715ab09d6aSIrina Tirdea goodix_free_irq(ts); 7725ab09d6aSIrina Tirdea 7735ab09d6aSIrina Tirdea /* Output LOW on the INT pin for 5 ms */ 7745ab09d6aSIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, 0); 7755ab09d6aSIrina Tirdea if (error) { 7765ab09d6aSIrina Tirdea goodix_request_irq(ts); 7775ab09d6aSIrina Tirdea return error; 7785ab09d6aSIrina Tirdea } 7795ab09d6aSIrina Tirdea 7805ab09d6aSIrina Tirdea usleep_range(5000, 6000); 7815ab09d6aSIrina Tirdea 7825ab09d6aSIrina Tirdea error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND, 7835ab09d6aSIrina Tirdea GOODIX_CMD_SCREEN_OFF); 7845ab09d6aSIrina Tirdea if (error) { 7855ab09d6aSIrina Tirdea dev_err(&ts->client->dev, "Screen off command failed\n"); 7865ab09d6aSIrina Tirdea gpiod_direction_input(ts->gpiod_int); 7875ab09d6aSIrina Tirdea goodix_request_irq(ts); 7885ab09d6aSIrina Tirdea return -EAGAIN; 7895ab09d6aSIrina Tirdea } 7905ab09d6aSIrina Tirdea 7915ab09d6aSIrina Tirdea /* 7925ab09d6aSIrina Tirdea * The datasheet specifies that the interval between sending screen-off 7935ab09d6aSIrina Tirdea * command and wake-up should be longer than 58 ms. To avoid waking up 7945ab09d6aSIrina Tirdea * sooner, delay 58ms here. 7955ab09d6aSIrina Tirdea */ 7965ab09d6aSIrina Tirdea msleep(58); 7975ab09d6aSIrina Tirdea return 0; 7985ab09d6aSIrina Tirdea } 7995ab09d6aSIrina Tirdea 8005ab09d6aSIrina Tirdea static int __maybe_unused goodix_resume(struct device *dev) 8015ab09d6aSIrina Tirdea { 8025ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 8035ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 8045ab09d6aSIrina Tirdea int error; 8055ab09d6aSIrina Tirdea 8065ab09d6aSIrina Tirdea if (!ts->gpiod_int || !ts->gpiod_rst) 8075ab09d6aSIrina Tirdea return 0; 8085ab09d6aSIrina Tirdea 8095ab09d6aSIrina Tirdea /* 8105ab09d6aSIrina Tirdea * Exit sleep mode by outputting HIGH level to INT pin 8115ab09d6aSIrina Tirdea * for 2ms~5ms. 8125ab09d6aSIrina Tirdea */ 8135ab09d6aSIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, 1); 8145ab09d6aSIrina Tirdea if (error) 8155ab09d6aSIrina Tirdea return error; 8165ab09d6aSIrina Tirdea 8175ab09d6aSIrina Tirdea usleep_range(2000, 5000); 8185ab09d6aSIrina Tirdea 8195ab09d6aSIrina Tirdea error = goodix_int_sync(ts); 8205ab09d6aSIrina Tirdea if (error) 8215ab09d6aSIrina Tirdea return error; 8225ab09d6aSIrina Tirdea 8235ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 8245ab09d6aSIrina Tirdea if (error) 8255ab09d6aSIrina Tirdea return error; 8265ab09d6aSIrina Tirdea 8275ab09d6aSIrina Tirdea return 0; 8285ab09d6aSIrina Tirdea } 8295ab09d6aSIrina Tirdea 8305ab09d6aSIrina Tirdea static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume); 8315ab09d6aSIrina Tirdea 832ca96ea86SBastien Nocera static const struct i2c_device_id goodix_ts_id[] = { 833ca96ea86SBastien Nocera { "GDIX1001:00", 0 }, 834ca96ea86SBastien Nocera { } 835ca96ea86SBastien Nocera }; 8362e9e910eSJavier Martinez Canillas MODULE_DEVICE_TABLE(i2c, goodix_ts_id); 837ca96ea86SBastien Nocera 838771d8f1bSAleksei Mamlin #ifdef CONFIG_ACPI 839ca96ea86SBastien Nocera static const struct acpi_device_id goodix_acpi_match[] = { 840ca96ea86SBastien Nocera { "GDIX1001", 0 }, 841ca96ea86SBastien Nocera { } 842ca96ea86SBastien Nocera }; 843ca96ea86SBastien Nocera MODULE_DEVICE_TABLE(acpi, goodix_acpi_match); 844771d8f1bSAleksei Mamlin #endif 845771d8f1bSAleksei Mamlin 846771d8f1bSAleksei Mamlin #ifdef CONFIG_OF 847771d8f1bSAleksei Mamlin static const struct of_device_id goodix_of_match[] = { 848771d8f1bSAleksei Mamlin { .compatible = "goodix,gt911" }, 849771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9110" }, 850771d8f1bSAleksei Mamlin { .compatible = "goodix,gt912" }, 851771d8f1bSAleksei Mamlin { .compatible = "goodix,gt927" }, 852771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9271" }, 853771d8f1bSAleksei Mamlin { .compatible = "goodix,gt928" }, 854771d8f1bSAleksei Mamlin { .compatible = "goodix,gt967" }, 855771d8f1bSAleksei Mamlin { } 856771d8f1bSAleksei Mamlin }; 857771d8f1bSAleksei Mamlin MODULE_DEVICE_TABLE(of, goodix_of_match); 858771d8f1bSAleksei Mamlin #endif 859ca96ea86SBastien Nocera 860ca96ea86SBastien Nocera static struct i2c_driver goodix_ts_driver = { 861ca96ea86SBastien Nocera .probe = goodix_ts_probe, 86268caf858SIrina Tirdea .remove = goodix_ts_remove, 863ca96ea86SBastien Nocera .id_table = goodix_ts_id, 864ca96ea86SBastien Nocera .driver = { 865ca96ea86SBastien Nocera .name = "Goodix-TS", 866771d8f1bSAleksei Mamlin .acpi_match_table = ACPI_PTR(goodix_acpi_match), 867771d8f1bSAleksei Mamlin .of_match_table = of_match_ptr(goodix_of_match), 8685ab09d6aSIrina Tirdea .pm = &goodix_pm_ops, 869ca96ea86SBastien Nocera }, 870ca96ea86SBastien Nocera }; 871ca96ea86SBastien Nocera module_i2c_driver(goodix_ts_driver); 872ca96ea86SBastien Nocera 873ca96ea86SBastien Nocera MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); 874ca96ea86SBastien Nocera MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>"); 875ca96ea86SBastien Nocera MODULE_DESCRIPTION("Goodix touchscreen driver"); 876ca96ea86SBastien Nocera MODULE_LICENSE("GPL v2"); 877