1ca96ea86SBastien Nocera /* 2ca96ea86SBastien Nocera * Driver for Goodix Touchscreens 3ca96ea86SBastien Nocera * 4ca96ea86SBastien Nocera * Copyright (c) 2014 Red Hat Inc. 5ad48cf5eSKarsten Merker * Copyright (c) 2015 K. Merker <merker@debian.org> 6ca96ea86SBastien Nocera * 7ca96ea86SBastien Nocera * This code is based on gt9xx.c authored by andrew@goodix.com: 8ca96ea86SBastien Nocera * 9ca96ea86SBastien Nocera * 2010 - 2012 Goodix Technology. 10ca96ea86SBastien Nocera */ 11ca96ea86SBastien Nocera 12ca96ea86SBastien Nocera /* 13ca96ea86SBastien Nocera * This program is free software; you can redistribute it and/or modify it 14ca96ea86SBastien Nocera * under the terms of the GNU General Public License as published by the Free 15ca96ea86SBastien Nocera * Software Foundation; version 2 of the License. 16ca96ea86SBastien Nocera */ 17ca96ea86SBastien Nocera 18ca96ea86SBastien Nocera #include <linux/kernel.h> 198b5a359cSBastien Nocera #include <linux/dmi.h> 2068caf858SIrina Tirdea #include <linux/firmware.h> 21ec6e1b40SIrina Tirdea #include <linux/gpio/consumer.h> 22ca96ea86SBastien Nocera #include <linux/i2c.h> 23ca96ea86SBastien Nocera #include <linux/input.h> 24ca96ea86SBastien Nocera #include <linux/input/mt.h> 25ca96ea86SBastien Nocera #include <linux/module.h> 26ca96ea86SBastien Nocera #include <linux/delay.h> 27ca96ea86SBastien Nocera #include <linux/irq.h> 28ca96ea86SBastien Nocera #include <linux/interrupt.h> 29ca96ea86SBastien Nocera #include <linux/slab.h> 30771d8f1bSAleksei Mamlin #include <linux/acpi.h> 31771d8f1bSAleksei Mamlin #include <linux/of.h> 32ca96ea86SBastien Nocera #include <asm/unaligned.h> 33ca96ea86SBastien Nocera 34ca96ea86SBastien Nocera struct goodix_ts_data { 35ca96ea86SBastien Nocera struct i2c_client *client; 36ca96ea86SBastien Nocera struct input_dev *input_dev; 37ca96ea86SBastien Nocera int abs_x_max; 38ca96ea86SBastien Nocera int abs_y_max; 39ad48cf5eSKarsten Merker bool swapped_x_y; 40ad48cf5eSKarsten Merker bool inverted_x; 41ad48cf5eSKarsten Merker bool inverted_y; 42ca96ea86SBastien Nocera unsigned int max_touch_num; 43ca96ea86SBastien Nocera unsigned int int_trigger_type; 44a779fbc6SIrina Tirdea int cfg_len; 45ec6e1b40SIrina Tirdea struct gpio_desc *gpiod_int; 46ec6e1b40SIrina Tirdea struct gpio_desc *gpiod_rst; 4768caf858SIrina Tirdea u16 id; 4868caf858SIrina Tirdea u16 version; 4968caf858SIrina Tirdea const char *cfg_name; 5068caf858SIrina Tirdea struct completion firmware_loading_complete; 515ab09d6aSIrina Tirdea unsigned long irq_flags; 52ca96ea86SBastien Nocera }; 53ca96ea86SBastien Nocera 54ec6e1b40SIrina Tirdea #define GOODIX_GPIO_INT_NAME "irq" 55ec6e1b40SIrina Tirdea #define GOODIX_GPIO_RST_NAME "reset" 56ec6e1b40SIrina Tirdea 57ca96ea86SBastien Nocera #define GOODIX_MAX_HEIGHT 4096 58ca96ea86SBastien Nocera #define GOODIX_MAX_WIDTH 4096 59ca96ea86SBastien Nocera #define GOODIX_INT_TRIGGER 1 60ca96ea86SBastien Nocera #define GOODIX_CONTACT_SIZE 8 61ca96ea86SBastien Nocera #define GOODIX_MAX_CONTACTS 10 62ca96ea86SBastien Nocera 63ca96ea86SBastien Nocera #define GOODIX_CONFIG_MAX_LENGTH 240 64a779fbc6SIrina Tirdea #define GOODIX_CONFIG_911_LENGTH 186 65a779fbc6SIrina Tirdea #define GOODIX_CONFIG_967_LENGTH 228 66ca96ea86SBastien Nocera 67ca96ea86SBastien Nocera /* Register defines */ 685ab09d6aSIrina Tirdea #define GOODIX_REG_COMMAND 0x8040 695ab09d6aSIrina Tirdea #define GOODIX_CMD_SCREEN_OFF 0x05 705ab09d6aSIrina Tirdea 71ca96ea86SBastien Nocera #define GOODIX_READ_COOR_ADDR 0x814E 72ca96ea86SBastien Nocera #define GOODIX_REG_CONFIG_DATA 0x8047 73e70b0307SIrina Tirdea #define GOODIX_REG_ID 0x8140 74ca96ea86SBastien Nocera 75ca96ea86SBastien Nocera #define RESOLUTION_LOC 1 76a7ac7c95SAleksei Mamlin #define MAX_CONTACTS_LOC 5 77ca96ea86SBastien Nocera #define TRIGGER_LOC 6 78ca96ea86SBastien Nocera 79ca96ea86SBastien Nocera static const unsigned long goodix_irq_flags[] = { 80ca96ea86SBastien Nocera IRQ_TYPE_EDGE_RISING, 81ca96ea86SBastien Nocera IRQ_TYPE_EDGE_FALLING, 82ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_LOW, 83ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_HIGH, 84ca96ea86SBastien Nocera }; 85ca96ea86SBastien Nocera 868b5a359cSBastien Nocera /* 878b5a359cSBastien Nocera * Those tablets have their coordinates origin at the bottom right 888b5a359cSBastien Nocera * of the tablet, as if rotated 180 degrees 898b5a359cSBastien Nocera */ 908b5a359cSBastien Nocera static const struct dmi_system_id rotated_screen[] = { 918b5a359cSBastien Nocera #if defined(CONFIG_DMI) && defined(CONFIG_X86) 928b5a359cSBastien Nocera { 938b5a359cSBastien Nocera .ident = "WinBook TW100", 948b5a359cSBastien Nocera .matches = { 958b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 968b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW100") 978b5a359cSBastien Nocera } 988b5a359cSBastien Nocera }, 998b5a359cSBastien Nocera { 1008b5a359cSBastien Nocera .ident = "WinBook TW700", 1018b5a359cSBastien Nocera .matches = { 1028b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 1038b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW700") 1048b5a359cSBastien Nocera }, 1058b5a359cSBastien Nocera }, 1068b5a359cSBastien Nocera #endif 1078b5a359cSBastien Nocera {} 1088b5a359cSBastien Nocera }; 1098b5a359cSBastien Nocera 110ca96ea86SBastien Nocera /** 111ca96ea86SBastien Nocera * goodix_i2c_read - read data from a register of the i2c slave device. 112ca96ea86SBastien Nocera * 113ca96ea86SBastien Nocera * @client: i2c device. 114ca96ea86SBastien Nocera * @reg: the register to read from. 115ca96ea86SBastien Nocera * @buf: raw write data buffer. 116ca96ea86SBastien Nocera * @len: length of the buffer to write 117ca96ea86SBastien Nocera */ 118ca96ea86SBastien Nocera static int goodix_i2c_read(struct i2c_client *client, 119ca96ea86SBastien Nocera u16 reg, u8 *buf, int len) 120ca96ea86SBastien Nocera { 121ca96ea86SBastien Nocera struct i2c_msg msgs[2]; 122ca96ea86SBastien Nocera u16 wbuf = cpu_to_be16(reg); 123ca96ea86SBastien Nocera int ret; 124ca96ea86SBastien Nocera 125ca96ea86SBastien Nocera msgs[0].flags = 0; 126ca96ea86SBastien Nocera msgs[0].addr = client->addr; 127ca96ea86SBastien Nocera msgs[0].len = 2; 128ca96ea86SBastien Nocera msgs[0].buf = (u8 *)&wbuf; 129ca96ea86SBastien Nocera 130ca96ea86SBastien Nocera msgs[1].flags = I2C_M_RD; 131ca96ea86SBastien Nocera msgs[1].addr = client->addr; 132ca96ea86SBastien Nocera msgs[1].len = len; 133ca96ea86SBastien Nocera msgs[1].buf = buf; 134ca96ea86SBastien Nocera 135ca96ea86SBastien Nocera ret = i2c_transfer(client->adapter, msgs, 2); 136ca96ea86SBastien Nocera return ret < 0 ? ret : (ret != ARRAY_SIZE(msgs) ? -EIO : 0); 137ca96ea86SBastien Nocera } 138ca96ea86SBastien Nocera 13968caf858SIrina Tirdea /** 14068caf858SIrina Tirdea * goodix_i2c_write - write data to a register of the i2c slave device. 14168caf858SIrina Tirdea * 14268caf858SIrina Tirdea * @client: i2c device. 14368caf858SIrina Tirdea * @reg: the register to write to. 14468caf858SIrina Tirdea * @buf: raw data buffer to write. 14568caf858SIrina Tirdea * @len: length of the buffer to write 14668caf858SIrina Tirdea */ 14768caf858SIrina Tirdea static int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf, 14868caf858SIrina Tirdea unsigned len) 14968caf858SIrina Tirdea { 15068caf858SIrina Tirdea u8 *addr_buf; 15168caf858SIrina Tirdea struct i2c_msg msg; 15268caf858SIrina Tirdea int ret; 15368caf858SIrina Tirdea 15468caf858SIrina Tirdea addr_buf = kmalloc(len + 2, GFP_KERNEL); 15568caf858SIrina Tirdea if (!addr_buf) 15668caf858SIrina Tirdea return -ENOMEM; 15768caf858SIrina Tirdea 15868caf858SIrina Tirdea addr_buf[0] = reg >> 8; 15968caf858SIrina Tirdea addr_buf[1] = reg & 0xFF; 16068caf858SIrina Tirdea memcpy(&addr_buf[2], buf, len); 16168caf858SIrina Tirdea 16268caf858SIrina Tirdea msg.flags = 0; 16368caf858SIrina Tirdea msg.addr = client->addr; 16468caf858SIrina Tirdea msg.buf = addr_buf; 16568caf858SIrina Tirdea msg.len = len + 2; 16668caf858SIrina Tirdea 16768caf858SIrina Tirdea ret = i2c_transfer(client->adapter, &msg, 1); 16868caf858SIrina Tirdea kfree(addr_buf); 16968caf858SIrina Tirdea return ret < 0 ? ret : (ret != 1 ? -EIO : 0); 17068caf858SIrina Tirdea } 17168caf858SIrina Tirdea 1725ab09d6aSIrina Tirdea static int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value) 1735ab09d6aSIrina Tirdea { 1745ab09d6aSIrina Tirdea return goodix_i2c_write(client, reg, &value, sizeof(value)); 1755ab09d6aSIrina Tirdea } 1765ab09d6aSIrina Tirdea 177a779fbc6SIrina Tirdea static int goodix_get_cfg_len(u16 id) 178a779fbc6SIrina Tirdea { 179a779fbc6SIrina Tirdea switch (id) { 180a779fbc6SIrina Tirdea case 911: 181a779fbc6SIrina Tirdea case 9271: 182a779fbc6SIrina Tirdea case 9110: 183a779fbc6SIrina Tirdea case 927: 184a779fbc6SIrina Tirdea case 928: 185a779fbc6SIrina Tirdea return GOODIX_CONFIG_911_LENGTH; 186a779fbc6SIrina Tirdea 187a779fbc6SIrina Tirdea case 912: 188a779fbc6SIrina Tirdea case 967: 189a779fbc6SIrina Tirdea return GOODIX_CONFIG_967_LENGTH; 190a779fbc6SIrina Tirdea 191a779fbc6SIrina Tirdea default: 192a779fbc6SIrina Tirdea return GOODIX_CONFIG_MAX_LENGTH; 193a779fbc6SIrina Tirdea } 194a779fbc6SIrina Tirdea } 195a779fbc6SIrina Tirdea 196ca96ea86SBastien Nocera static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data) 197ca96ea86SBastien Nocera { 198ca96ea86SBastien Nocera int touch_num; 199ca96ea86SBastien Nocera int error; 200ca96ea86SBastien Nocera 201ca96ea86SBastien Nocera error = goodix_i2c_read(ts->client, GOODIX_READ_COOR_ADDR, data, 202ca96ea86SBastien Nocera GOODIX_CONTACT_SIZE + 1); 203ca96ea86SBastien Nocera if (error) { 204ca96ea86SBastien Nocera dev_err(&ts->client->dev, "I2C transfer error: %d\n", error); 205ca96ea86SBastien Nocera return error; 206ca96ea86SBastien Nocera } 207ca96ea86SBastien Nocera 2085f6f117cSPaul Cercueil if (!(data[0] & 0x80)) 2095f6f117cSPaul Cercueil return -EAGAIN; 2105f6f117cSPaul Cercueil 211ca96ea86SBastien Nocera touch_num = data[0] & 0x0f; 212a7ac7c95SAleksei Mamlin if (touch_num > ts->max_touch_num) 213ca96ea86SBastien Nocera return -EPROTO; 214ca96ea86SBastien Nocera 215ca96ea86SBastien Nocera if (touch_num > 1) { 216ca96ea86SBastien Nocera data += 1 + GOODIX_CONTACT_SIZE; 217ca96ea86SBastien Nocera error = goodix_i2c_read(ts->client, 218ca96ea86SBastien Nocera GOODIX_READ_COOR_ADDR + 219ca96ea86SBastien Nocera 1 + GOODIX_CONTACT_SIZE, 220ca96ea86SBastien Nocera data, 221ca96ea86SBastien Nocera GOODIX_CONTACT_SIZE * (touch_num - 1)); 222ca96ea86SBastien Nocera if (error) 223ca96ea86SBastien Nocera return error; 224ca96ea86SBastien Nocera } 225ca96ea86SBastien Nocera 226ca96ea86SBastien Nocera return touch_num; 227ca96ea86SBastien Nocera } 228ca96ea86SBastien Nocera 229ca96ea86SBastien Nocera static void goodix_ts_report_touch(struct goodix_ts_data *ts, u8 *coor_data) 230ca96ea86SBastien Nocera { 231ca96ea86SBastien Nocera int id = coor_data[0] & 0x0F; 232ca96ea86SBastien Nocera int input_x = get_unaligned_le16(&coor_data[1]); 233ca96ea86SBastien Nocera int input_y = get_unaligned_le16(&coor_data[3]); 234ca96ea86SBastien Nocera int input_w = get_unaligned_le16(&coor_data[5]); 235ca96ea86SBastien Nocera 236ad48cf5eSKarsten Merker /* Inversions have to happen before axis swapping */ 237ad48cf5eSKarsten Merker if (ts->inverted_x) 238ad48cf5eSKarsten Merker input_x = ts->abs_x_max - input_x; 239ad48cf5eSKarsten Merker if (ts->inverted_y) 240ad48cf5eSKarsten Merker input_y = ts->abs_y_max - input_y; 241ad48cf5eSKarsten Merker if (ts->swapped_x_y) 242ad48cf5eSKarsten Merker swap(input_x, input_y); 243ad48cf5eSKarsten Merker 244ca96ea86SBastien Nocera input_mt_slot(ts->input_dev, id); 245ca96ea86SBastien Nocera input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 246ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_POSITION_X, input_x); 247ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_POSITION_Y, input_y); 248ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 249ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 250ca96ea86SBastien Nocera } 251ca96ea86SBastien Nocera 252ca96ea86SBastien Nocera /** 253ca96ea86SBastien Nocera * goodix_process_events - Process incoming events 254ca96ea86SBastien Nocera * 255ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 256ca96ea86SBastien Nocera * 257ca96ea86SBastien Nocera * Called when the IRQ is triggered. Read the current device state, and push 258ca96ea86SBastien Nocera * the input events to the user space. 259ca96ea86SBastien Nocera */ 260ca96ea86SBastien Nocera static void goodix_process_events(struct goodix_ts_data *ts) 261ca96ea86SBastien Nocera { 2620e0432f0SIrina Tirdea u8 point_data[1 + GOODIX_CONTACT_SIZE * GOODIX_MAX_CONTACTS]; 263ca96ea86SBastien Nocera int touch_num; 264ca96ea86SBastien Nocera int i; 265ca96ea86SBastien Nocera 266ca96ea86SBastien Nocera touch_num = goodix_ts_read_input_report(ts, point_data); 267ca96ea86SBastien Nocera if (touch_num < 0) 268ca96ea86SBastien Nocera return; 269ca96ea86SBastien Nocera 270ca96ea86SBastien Nocera for (i = 0; i < touch_num; i++) 271ca96ea86SBastien Nocera goodix_ts_report_touch(ts, 272ca96ea86SBastien Nocera &point_data[1 + GOODIX_CONTACT_SIZE * i]); 273ca96ea86SBastien Nocera 274ca96ea86SBastien Nocera input_mt_sync_frame(ts->input_dev); 275ca96ea86SBastien Nocera input_sync(ts->input_dev); 276ca96ea86SBastien Nocera } 277ca96ea86SBastien Nocera 278ca96ea86SBastien Nocera /** 279ca96ea86SBastien Nocera * goodix_ts_irq_handler - The IRQ handler 280ca96ea86SBastien Nocera * 281ca96ea86SBastien Nocera * @irq: interrupt number. 282ca96ea86SBastien Nocera * @dev_id: private data pointer. 283ca96ea86SBastien Nocera */ 284ca96ea86SBastien Nocera static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id) 285ca96ea86SBastien Nocera { 286ca96ea86SBastien Nocera struct goodix_ts_data *ts = dev_id; 287ca96ea86SBastien Nocera 288ca96ea86SBastien Nocera goodix_process_events(ts); 289ca96ea86SBastien Nocera 2905d655b35SIrina Tirdea if (goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0) < 0) 291ca96ea86SBastien Nocera dev_err(&ts->client->dev, "I2C write end_cmd error\n"); 292ca96ea86SBastien Nocera 293ca96ea86SBastien Nocera return IRQ_HANDLED; 294ca96ea86SBastien Nocera } 295ca96ea86SBastien Nocera 2965ab09d6aSIrina Tirdea static void goodix_free_irq(struct goodix_ts_data *ts) 2975ab09d6aSIrina Tirdea { 2985ab09d6aSIrina Tirdea devm_free_irq(&ts->client->dev, ts->client->irq, ts); 2995ab09d6aSIrina Tirdea } 3005ab09d6aSIrina Tirdea 3015ab09d6aSIrina Tirdea static int goodix_request_irq(struct goodix_ts_data *ts) 3025ab09d6aSIrina Tirdea { 3035ab09d6aSIrina Tirdea return devm_request_threaded_irq(&ts->client->dev, ts->client->irq, 3045ab09d6aSIrina Tirdea NULL, goodix_ts_irq_handler, 3055ab09d6aSIrina Tirdea ts->irq_flags, ts->client->name, ts); 3065ab09d6aSIrina Tirdea } 3075ab09d6aSIrina Tirdea 30868caf858SIrina Tirdea /** 30968caf858SIrina Tirdea * goodix_check_cfg - Checks if config fw is valid 31068caf858SIrina Tirdea * 31168caf858SIrina Tirdea * @ts: goodix_ts_data pointer 31268caf858SIrina Tirdea * @cfg: firmware config data 31368caf858SIrina Tirdea */ 31468caf858SIrina Tirdea static int goodix_check_cfg(struct goodix_ts_data *ts, 31568caf858SIrina Tirdea const struct firmware *cfg) 31668caf858SIrina Tirdea { 31768caf858SIrina Tirdea int i, raw_cfg_len; 31868caf858SIrina Tirdea u8 check_sum = 0; 31968caf858SIrina Tirdea 32068caf858SIrina Tirdea if (cfg->size > GOODIX_CONFIG_MAX_LENGTH) { 32168caf858SIrina Tirdea dev_err(&ts->client->dev, 32268caf858SIrina Tirdea "The length of the config fw is not correct"); 32368caf858SIrina Tirdea return -EINVAL; 32468caf858SIrina Tirdea } 32568caf858SIrina Tirdea 32668caf858SIrina Tirdea raw_cfg_len = cfg->size - 2; 32768caf858SIrina Tirdea for (i = 0; i < raw_cfg_len; i++) 32868caf858SIrina Tirdea check_sum += cfg->data[i]; 32968caf858SIrina Tirdea check_sum = (~check_sum) + 1; 33068caf858SIrina Tirdea if (check_sum != cfg->data[raw_cfg_len]) { 33168caf858SIrina Tirdea dev_err(&ts->client->dev, 33268caf858SIrina Tirdea "The checksum of the config fw is not correct"); 33368caf858SIrina Tirdea return -EINVAL; 33468caf858SIrina Tirdea } 33568caf858SIrina Tirdea 33668caf858SIrina Tirdea if (cfg->data[raw_cfg_len + 1] != 1) { 33768caf858SIrina Tirdea dev_err(&ts->client->dev, 33868caf858SIrina Tirdea "Config fw must have Config_Fresh register set"); 33968caf858SIrina Tirdea return -EINVAL; 34068caf858SIrina Tirdea } 34168caf858SIrina Tirdea 34268caf858SIrina Tirdea return 0; 34368caf858SIrina Tirdea } 34468caf858SIrina Tirdea 34568caf858SIrina Tirdea /** 34668caf858SIrina Tirdea * goodix_send_cfg - Write fw config to device 34768caf858SIrina Tirdea * 34868caf858SIrina Tirdea * @ts: goodix_ts_data pointer 34968caf858SIrina Tirdea * @cfg: config firmware to write to device 35068caf858SIrina Tirdea */ 35168caf858SIrina Tirdea static int goodix_send_cfg(struct goodix_ts_data *ts, 35268caf858SIrina Tirdea const struct firmware *cfg) 35368caf858SIrina Tirdea { 35468caf858SIrina Tirdea int error; 35568caf858SIrina Tirdea 35668caf858SIrina Tirdea error = goodix_check_cfg(ts, cfg); 35768caf858SIrina Tirdea if (error) 35868caf858SIrina Tirdea return error; 35968caf858SIrina Tirdea 36068caf858SIrina Tirdea error = goodix_i2c_write(ts->client, GOODIX_REG_CONFIG_DATA, cfg->data, 36168caf858SIrina Tirdea cfg->size); 36268caf858SIrina Tirdea if (error) { 36368caf858SIrina Tirdea dev_err(&ts->client->dev, "Failed to write config data: %d", 36468caf858SIrina Tirdea error); 36568caf858SIrina Tirdea return error; 36668caf858SIrina Tirdea } 36768caf858SIrina Tirdea dev_dbg(&ts->client->dev, "Config sent successfully."); 36868caf858SIrina Tirdea 36968caf858SIrina Tirdea /* Let the firmware reconfigure itself, so sleep for 10ms */ 37068caf858SIrina Tirdea usleep_range(10000, 11000); 37168caf858SIrina Tirdea 37268caf858SIrina Tirdea return 0; 37368caf858SIrina Tirdea } 37468caf858SIrina Tirdea 375ec6e1b40SIrina Tirdea static int goodix_int_sync(struct goodix_ts_data *ts) 376ec6e1b40SIrina Tirdea { 377ec6e1b40SIrina Tirdea int error; 378ec6e1b40SIrina Tirdea 379ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, 0); 380ec6e1b40SIrina Tirdea if (error) 381ec6e1b40SIrina Tirdea return error; 382ec6e1b40SIrina Tirdea 383ec6e1b40SIrina Tirdea msleep(50); /* T5: 50ms */ 384ec6e1b40SIrina Tirdea 385ec6e1b40SIrina Tirdea error = gpiod_direction_input(ts->gpiod_int); 386ec6e1b40SIrina Tirdea if (error) 387ec6e1b40SIrina Tirdea return error; 388ec6e1b40SIrina Tirdea 389ec6e1b40SIrina Tirdea return 0; 390ec6e1b40SIrina Tirdea } 391ec6e1b40SIrina Tirdea 392ec6e1b40SIrina Tirdea /** 393ec6e1b40SIrina Tirdea * goodix_reset - Reset device during power on 394ec6e1b40SIrina Tirdea * 395ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 396ec6e1b40SIrina Tirdea */ 397ec6e1b40SIrina Tirdea static int goodix_reset(struct goodix_ts_data *ts) 398ec6e1b40SIrina Tirdea { 399ec6e1b40SIrina Tirdea int error; 400ec6e1b40SIrina Tirdea 401ec6e1b40SIrina Tirdea /* begin select I2C slave addr */ 402ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 0); 403ec6e1b40SIrina Tirdea if (error) 404ec6e1b40SIrina Tirdea return error; 405ec6e1b40SIrina Tirdea 406ec6e1b40SIrina Tirdea msleep(20); /* T2: > 10ms */ 407ec6e1b40SIrina Tirdea 408ec6e1b40SIrina Tirdea /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */ 409ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, ts->client->addr == 0x14); 410ec6e1b40SIrina Tirdea if (error) 411ec6e1b40SIrina Tirdea return error; 412ec6e1b40SIrina Tirdea 413ec6e1b40SIrina Tirdea usleep_range(100, 2000); /* T3: > 100us */ 414ec6e1b40SIrina Tirdea 415ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 1); 416ec6e1b40SIrina Tirdea if (error) 417ec6e1b40SIrina Tirdea return error; 418ec6e1b40SIrina Tirdea 419ec6e1b40SIrina Tirdea usleep_range(6000, 10000); /* T4: > 5ms */ 420ec6e1b40SIrina Tirdea 421ec6e1b40SIrina Tirdea /* end select I2C slave addr */ 422ec6e1b40SIrina Tirdea error = gpiod_direction_input(ts->gpiod_rst); 423ec6e1b40SIrina Tirdea if (error) 424ec6e1b40SIrina Tirdea return error; 425ec6e1b40SIrina Tirdea 426ec6e1b40SIrina Tirdea error = goodix_int_sync(ts); 427ec6e1b40SIrina Tirdea if (error) 428ec6e1b40SIrina Tirdea return error; 429ec6e1b40SIrina Tirdea 430ec6e1b40SIrina Tirdea return 0; 431ec6e1b40SIrina Tirdea } 432ec6e1b40SIrina Tirdea 433ec6e1b40SIrina Tirdea /** 434ec6e1b40SIrina Tirdea * goodix_get_gpio_config - Get GPIO config from ACPI/DT 435ec6e1b40SIrina Tirdea * 436ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 437ec6e1b40SIrina Tirdea */ 438ec6e1b40SIrina Tirdea static int goodix_get_gpio_config(struct goodix_ts_data *ts) 439ec6e1b40SIrina Tirdea { 440ec6e1b40SIrina Tirdea int error; 441ec6e1b40SIrina Tirdea struct device *dev; 442ec6e1b40SIrina Tirdea struct gpio_desc *gpiod; 443ec6e1b40SIrina Tirdea 444ec6e1b40SIrina Tirdea if (!ts->client) 445ec6e1b40SIrina Tirdea return -EINVAL; 446ec6e1b40SIrina Tirdea dev = &ts->client->dev; 447ec6e1b40SIrina Tirdea 448ec6e1b40SIrina Tirdea /* Get the interrupt GPIO pin number */ 449ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN); 450ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 451ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 452ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 453ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 454ec6e1b40SIrina Tirdea GOODIX_GPIO_INT_NAME, error); 455ec6e1b40SIrina Tirdea return error; 456ec6e1b40SIrina Tirdea } 457ec6e1b40SIrina Tirdea 458ec6e1b40SIrina Tirdea ts->gpiod_int = gpiod; 459ec6e1b40SIrina Tirdea 460ec6e1b40SIrina Tirdea /* Get the reset line GPIO pin number */ 461ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, GPIOD_IN); 462ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 463ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 464ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 465ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 466ec6e1b40SIrina Tirdea GOODIX_GPIO_RST_NAME, error); 467ec6e1b40SIrina Tirdea return error; 468ec6e1b40SIrina Tirdea } 469ec6e1b40SIrina Tirdea 470ec6e1b40SIrina Tirdea ts->gpiod_rst = gpiod; 471ec6e1b40SIrina Tirdea 472ec6e1b40SIrina Tirdea return 0; 473ec6e1b40SIrina Tirdea } 474ec6e1b40SIrina Tirdea 475ca96ea86SBastien Nocera /** 476ca96ea86SBastien Nocera * goodix_read_config - Read the embedded configuration of the panel 477ca96ea86SBastien Nocera * 478ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 479ca96ea86SBastien Nocera * 480ca96ea86SBastien Nocera * Must be called during probe 481ca96ea86SBastien Nocera */ 482ca96ea86SBastien Nocera static void goodix_read_config(struct goodix_ts_data *ts) 483ca96ea86SBastien Nocera { 484ca96ea86SBastien Nocera u8 config[GOODIX_CONFIG_MAX_LENGTH]; 485ca96ea86SBastien Nocera int error; 486ca96ea86SBastien Nocera 487ca96ea86SBastien Nocera error = goodix_i2c_read(ts->client, GOODIX_REG_CONFIG_DATA, 488a779fbc6SIrina Tirdea config, ts->cfg_len); 489ca96ea86SBastien Nocera if (error) { 490ca96ea86SBastien Nocera dev_warn(&ts->client->dev, 491ca96ea86SBastien Nocera "Error reading config (%d), using defaults\n", 492ca96ea86SBastien Nocera error); 493ca96ea86SBastien Nocera ts->abs_x_max = GOODIX_MAX_WIDTH; 494ca96ea86SBastien Nocera ts->abs_y_max = GOODIX_MAX_HEIGHT; 495ad48cf5eSKarsten Merker if (ts->swapped_x_y) 496ad48cf5eSKarsten Merker swap(ts->abs_x_max, ts->abs_y_max); 497ca96ea86SBastien Nocera ts->int_trigger_type = GOODIX_INT_TRIGGER; 498a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 499ca96ea86SBastien Nocera return; 500ca96ea86SBastien Nocera } 501ca96ea86SBastien Nocera 502ca96ea86SBastien Nocera ts->abs_x_max = get_unaligned_le16(&config[RESOLUTION_LOC]); 503ca96ea86SBastien Nocera ts->abs_y_max = get_unaligned_le16(&config[RESOLUTION_LOC + 2]); 504ad48cf5eSKarsten Merker if (ts->swapped_x_y) 505ad48cf5eSKarsten Merker swap(ts->abs_x_max, ts->abs_y_max); 506a7ac7c95SAleksei Mamlin ts->int_trigger_type = config[TRIGGER_LOC] & 0x03; 507a7ac7c95SAleksei Mamlin ts->max_touch_num = config[MAX_CONTACTS_LOC] & 0x0f; 508a7ac7c95SAleksei Mamlin if (!ts->abs_x_max || !ts->abs_y_max || !ts->max_touch_num) { 509ca96ea86SBastien Nocera dev_err(&ts->client->dev, 510ca96ea86SBastien Nocera "Invalid config, using defaults\n"); 511ca96ea86SBastien Nocera ts->abs_x_max = GOODIX_MAX_WIDTH; 512ca96ea86SBastien Nocera ts->abs_y_max = GOODIX_MAX_HEIGHT; 513ad48cf5eSKarsten Merker if (ts->swapped_x_y) 514ad48cf5eSKarsten Merker swap(ts->abs_x_max, ts->abs_y_max); 515a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 516ca96ea86SBastien Nocera } 5178b5a359cSBastien Nocera 51857c80e8eSKarsten Merker if (dmi_check_system(rotated_screen)) { 51957c80e8eSKarsten Merker ts->inverted_x = true; 52057c80e8eSKarsten Merker ts->inverted_y = true; 5218b5a359cSBastien Nocera dev_dbg(&ts->client->dev, 5228b5a359cSBastien Nocera "Applying '180 degrees rotated screen' quirk\n"); 523ca96ea86SBastien Nocera } 52457c80e8eSKarsten Merker } 525ca96ea86SBastien Nocera 526ca96ea86SBastien Nocera /** 527ca96ea86SBastien Nocera * goodix_read_version - Read goodix touchscreen version 528ca96ea86SBastien Nocera * 52968caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 530ca96ea86SBastien Nocera */ 53168caf858SIrina Tirdea static int goodix_read_version(struct goodix_ts_data *ts) 532ca96ea86SBastien Nocera { 533ca96ea86SBastien Nocera int error; 534ca96ea86SBastien Nocera u8 buf[6]; 535e70b0307SIrina Tirdea char id_str[5]; 536ca96ea86SBastien Nocera 53768caf858SIrina Tirdea error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf)); 538ca96ea86SBastien Nocera if (error) { 53968caf858SIrina Tirdea dev_err(&ts->client->dev, "read version failed: %d\n", error); 540ca96ea86SBastien Nocera return error; 541ca96ea86SBastien Nocera } 542ca96ea86SBastien Nocera 543e70b0307SIrina Tirdea memcpy(id_str, buf, 4); 544e70b0307SIrina Tirdea id_str[4] = 0; 54568caf858SIrina Tirdea if (kstrtou16(id_str, 10, &ts->id)) 54668caf858SIrina Tirdea ts->id = 0x1001; 547e70b0307SIrina Tirdea 54868caf858SIrina Tirdea ts->version = get_unaligned_le16(&buf[4]); 549ca96ea86SBastien Nocera 55068caf858SIrina Tirdea dev_info(&ts->client->dev, "ID %d, version: %04x\n", ts->id, 55168caf858SIrina Tirdea ts->version); 552ca96ea86SBastien Nocera 553ca96ea86SBastien Nocera return 0; 554ca96ea86SBastien Nocera } 555ca96ea86SBastien Nocera 556ca96ea86SBastien Nocera /** 557ca96ea86SBastien Nocera * goodix_i2c_test - I2C test function to check if the device answers. 558ca96ea86SBastien Nocera * 559ca96ea86SBastien Nocera * @client: the i2c client 560ca96ea86SBastien Nocera */ 561ca96ea86SBastien Nocera static int goodix_i2c_test(struct i2c_client *client) 562ca96ea86SBastien Nocera { 563ca96ea86SBastien Nocera int retry = 0; 564ca96ea86SBastien Nocera int error; 565ca96ea86SBastien Nocera u8 test; 566ca96ea86SBastien Nocera 567ca96ea86SBastien Nocera while (retry++ < 2) { 568ca96ea86SBastien Nocera error = goodix_i2c_read(client, GOODIX_REG_CONFIG_DATA, 569ca96ea86SBastien Nocera &test, 1); 570ca96ea86SBastien Nocera if (!error) 571ca96ea86SBastien Nocera return 0; 572ca96ea86SBastien Nocera 573ca96ea86SBastien Nocera dev_err(&client->dev, "i2c test failed attempt %d: %d\n", 574ca96ea86SBastien Nocera retry, error); 575ca96ea86SBastien Nocera msleep(20); 576ca96ea86SBastien Nocera } 577ca96ea86SBastien Nocera 578ca96ea86SBastien Nocera return error; 579ca96ea86SBastien Nocera } 580ca96ea86SBastien Nocera 581ca96ea86SBastien Nocera /** 582ca96ea86SBastien Nocera * goodix_request_input_dev - Allocate, populate and register the input device 583ca96ea86SBastien Nocera * 584ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 585ca96ea86SBastien Nocera * 586ca96ea86SBastien Nocera * Must be called during probe 587ca96ea86SBastien Nocera */ 58868caf858SIrina Tirdea static int goodix_request_input_dev(struct goodix_ts_data *ts) 589ca96ea86SBastien Nocera { 590ca96ea86SBastien Nocera int error; 591ca96ea86SBastien Nocera 592ca96ea86SBastien Nocera ts->input_dev = devm_input_allocate_device(&ts->client->dev); 593ca96ea86SBastien Nocera if (!ts->input_dev) { 594ca96ea86SBastien Nocera dev_err(&ts->client->dev, "Failed to allocate input device."); 595ca96ea86SBastien Nocera return -ENOMEM; 596ca96ea86SBastien Nocera } 597ca96ea86SBastien Nocera 5980dfb35bdSIrina Tirdea input_set_abs_params(ts->input_dev, ABS_MT_POSITION_X, 5990dfb35bdSIrina Tirdea 0, ts->abs_x_max, 0, 0); 6000dfb35bdSIrina Tirdea input_set_abs_params(ts->input_dev, ABS_MT_POSITION_Y, 6010dfb35bdSIrina Tirdea 0, ts->abs_y_max, 0, 0); 602ca96ea86SBastien Nocera input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 603ca96ea86SBastien Nocera input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 604ca96ea86SBastien Nocera 605a7ac7c95SAleksei Mamlin input_mt_init_slots(ts->input_dev, ts->max_touch_num, 606ca96ea86SBastien Nocera INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); 607ca96ea86SBastien Nocera 608ca96ea86SBastien Nocera ts->input_dev->name = "Goodix Capacitive TouchScreen"; 609ca96ea86SBastien Nocera ts->input_dev->phys = "input/ts"; 610ca96ea86SBastien Nocera ts->input_dev->id.bustype = BUS_I2C; 611ca96ea86SBastien Nocera ts->input_dev->id.vendor = 0x0416; 61268caf858SIrina Tirdea ts->input_dev->id.product = ts->id; 61368caf858SIrina Tirdea ts->input_dev->id.version = ts->version; 614ca96ea86SBastien Nocera 615ca96ea86SBastien Nocera error = input_register_device(ts->input_dev); 616ca96ea86SBastien Nocera if (error) { 617ca96ea86SBastien Nocera dev_err(&ts->client->dev, 618ca96ea86SBastien Nocera "Failed to register input device: %d", error); 619ca96ea86SBastien Nocera return error; 620ca96ea86SBastien Nocera } 621ca96ea86SBastien Nocera 622ca96ea86SBastien Nocera return 0; 623ca96ea86SBastien Nocera } 624ca96ea86SBastien Nocera 62568caf858SIrina Tirdea /** 62668caf858SIrina Tirdea * goodix_configure_dev - Finish device initialization 62768caf858SIrina Tirdea * 62868caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 62968caf858SIrina Tirdea * 63068caf858SIrina Tirdea * Must be called from probe to finish initialization of the device. 63168caf858SIrina Tirdea * Contains the common initialization code for both devices that 63268caf858SIrina Tirdea * declare gpio pins and devices that do not. It is either called 63368caf858SIrina Tirdea * directly from probe or from request_firmware_wait callback. 63468caf858SIrina Tirdea */ 63568caf858SIrina Tirdea static int goodix_configure_dev(struct goodix_ts_data *ts) 63668caf858SIrina Tirdea { 63768caf858SIrina Tirdea int error; 63868caf858SIrina Tirdea 639ad48cf5eSKarsten Merker ts->swapped_x_y = device_property_read_bool(&ts->client->dev, 640ad48cf5eSKarsten Merker "touchscreen-swapped-x-y"); 641ad48cf5eSKarsten Merker ts->inverted_x = device_property_read_bool(&ts->client->dev, 642ad48cf5eSKarsten Merker "touchscreen-inverted-x"); 643ad48cf5eSKarsten Merker ts->inverted_y = device_property_read_bool(&ts->client->dev, 644ad48cf5eSKarsten Merker "touchscreen-inverted-y"); 645ad48cf5eSKarsten Merker 64668caf858SIrina Tirdea goodix_read_config(ts); 64768caf858SIrina Tirdea 64868caf858SIrina Tirdea error = goodix_request_input_dev(ts); 64968caf858SIrina Tirdea if (error) 65068caf858SIrina Tirdea return error; 65168caf858SIrina Tirdea 6525ab09d6aSIrina Tirdea ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT; 6535ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 65468caf858SIrina Tirdea if (error) { 65568caf858SIrina Tirdea dev_err(&ts->client->dev, "request IRQ failed: %d\n", error); 65668caf858SIrina Tirdea return error; 65768caf858SIrina Tirdea } 65868caf858SIrina Tirdea 65968caf858SIrina Tirdea return 0; 66068caf858SIrina Tirdea } 66168caf858SIrina Tirdea 66268caf858SIrina Tirdea /** 66368caf858SIrina Tirdea * goodix_config_cb - Callback to finish device init 66468caf858SIrina Tirdea * 66568caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 66668caf858SIrina Tirdea * 66768caf858SIrina Tirdea * request_firmware_wait callback that finishes 66868caf858SIrina Tirdea * initialization of the device. 66968caf858SIrina Tirdea */ 67068caf858SIrina Tirdea static void goodix_config_cb(const struct firmware *cfg, void *ctx) 67168caf858SIrina Tirdea { 67268caf858SIrina Tirdea struct goodix_ts_data *ts = ctx; 67368caf858SIrina Tirdea int error; 67468caf858SIrina Tirdea 67568caf858SIrina Tirdea if (cfg) { 67668caf858SIrina Tirdea /* send device configuration to the firmware */ 67768caf858SIrina Tirdea error = goodix_send_cfg(ts, cfg); 67868caf858SIrina Tirdea if (error) 67968caf858SIrina Tirdea goto err_release_cfg; 68068caf858SIrina Tirdea } 68168caf858SIrina Tirdea 68268caf858SIrina Tirdea goodix_configure_dev(ts); 68368caf858SIrina Tirdea 68468caf858SIrina Tirdea err_release_cfg: 68568caf858SIrina Tirdea release_firmware(cfg); 68668caf858SIrina Tirdea complete_all(&ts->firmware_loading_complete); 68768caf858SIrina Tirdea } 68868caf858SIrina Tirdea 689ca96ea86SBastien Nocera static int goodix_ts_probe(struct i2c_client *client, 690ca96ea86SBastien Nocera const struct i2c_device_id *id) 691ca96ea86SBastien Nocera { 692ca96ea86SBastien Nocera struct goodix_ts_data *ts; 693ca96ea86SBastien Nocera int error; 694ca96ea86SBastien Nocera 695ca96ea86SBastien Nocera dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr); 696ca96ea86SBastien Nocera 697ca96ea86SBastien Nocera if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 698ca96ea86SBastien Nocera dev_err(&client->dev, "I2C check functionality failed.\n"); 699ca96ea86SBastien Nocera return -ENXIO; 700ca96ea86SBastien Nocera } 701ca96ea86SBastien Nocera 702ca96ea86SBastien Nocera ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); 703ca96ea86SBastien Nocera if (!ts) 704ca96ea86SBastien Nocera return -ENOMEM; 705ca96ea86SBastien Nocera 706ca96ea86SBastien Nocera ts->client = client; 707ca96ea86SBastien Nocera i2c_set_clientdata(client, ts); 70868caf858SIrina Tirdea init_completion(&ts->firmware_loading_complete); 709ca96ea86SBastien Nocera 710ec6e1b40SIrina Tirdea error = goodix_get_gpio_config(ts); 711ec6e1b40SIrina Tirdea if (error) 712ec6e1b40SIrina Tirdea return error; 713ec6e1b40SIrina Tirdea 714ec6e1b40SIrina Tirdea if (ts->gpiod_int && ts->gpiod_rst) { 715ec6e1b40SIrina Tirdea /* reset the controller */ 716ec6e1b40SIrina Tirdea error = goodix_reset(ts); 717ec6e1b40SIrina Tirdea if (error) { 718ec6e1b40SIrina Tirdea dev_err(&client->dev, "Controller reset failed.\n"); 719ec6e1b40SIrina Tirdea return error; 720ec6e1b40SIrina Tirdea } 721ec6e1b40SIrina Tirdea } 722ec6e1b40SIrina Tirdea 723ca96ea86SBastien Nocera error = goodix_i2c_test(client); 724ca96ea86SBastien Nocera if (error) { 725ca96ea86SBastien Nocera dev_err(&client->dev, "I2C communication failure: %d\n", error); 726ca96ea86SBastien Nocera return error; 727ca96ea86SBastien Nocera } 728ca96ea86SBastien Nocera 72968caf858SIrina Tirdea error = goodix_read_version(ts); 730ca96ea86SBastien Nocera if (error) { 731ca96ea86SBastien Nocera dev_err(&client->dev, "Read version failed.\n"); 732ca96ea86SBastien Nocera return error; 733ca96ea86SBastien Nocera } 734ca96ea86SBastien Nocera 73568caf858SIrina Tirdea ts->cfg_len = goodix_get_cfg_len(ts->id); 736a779fbc6SIrina Tirdea 73768caf858SIrina Tirdea if (ts->gpiod_int && ts->gpiod_rst) { 73868caf858SIrina Tirdea /* update device config */ 73968caf858SIrina Tirdea ts->cfg_name = devm_kasprintf(&client->dev, GFP_KERNEL, 74068caf858SIrina Tirdea "goodix_%d_cfg.bin", ts->id); 74168caf858SIrina Tirdea if (!ts->cfg_name) 74268caf858SIrina Tirdea return -ENOMEM; 743ca96ea86SBastien Nocera 74468caf858SIrina Tirdea error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name, 74568caf858SIrina Tirdea &client->dev, GFP_KERNEL, ts, 74668caf858SIrina Tirdea goodix_config_cb); 747ca96ea86SBastien Nocera if (error) { 74868caf858SIrina Tirdea dev_err(&client->dev, 74968caf858SIrina Tirdea "Failed to invoke firmware loader: %d\n", 75068caf858SIrina Tirdea error); 751ca96ea86SBastien Nocera return error; 752ca96ea86SBastien Nocera } 753ca96ea86SBastien Nocera 754ca96ea86SBastien Nocera return 0; 75568caf858SIrina Tirdea } else { 75668caf858SIrina Tirdea error = goodix_configure_dev(ts); 75768caf858SIrina Tirdea if (error) 75868caf858SIrina Tirdea return error; 75968caf858SIrina Tirdea } 76068caf858SIrina Tirdea 76168caf858SIrina Tirdea return 0; 76268caf858SIrina Tirdea } 76368caf858SIrina Tirdea 76468caf858SIrina Tirdea static int goodix_ts_remove(struct i2c_client *client) 76568caf858SIrina Tirdea { 76668caf858SIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 76768caf858SIrina Tirdea 76868caf858SIrina Tirdea if (ts->gpiod_int && ts->gpiod_rst) 76968caf858SIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 77068caf858SIrina Tirdea 77168caf858SIrina Tirdea return 0; 772ca96ea86SBastien Nocera } 773ca96ea86SBastien Nocera 7745ab09d6aSIrina Tirdea static int __maybe_unused goodix_suspend(struct device *dev) 7755ab09d6aSIrina Tirdea { 7765ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 7775ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 7785ab09d6aSIrina Tirdea int error; 7795ab09d6aSIrina Tirdea 7805ab09d6aSIrina Tirdea /* We need gpio pins to suspend/resume */ 7815ab09d6aSIrina Tirdea if (!ts->gpiod_int || !ts->gpiod_rst) 7825ab09d6aSIrina Tirdea return 0; 7835ab09d6aSIrina Tirdea 7845ab09d6aSIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 7855ab09d6aSIrina Tirdea 7865ab09d6aSIrina Tirdea /* Free IRQ as IRQ pin is used as output in the suspend sequence */ 7875ab09d6aSIrina Tirdea goodix_free_irq(ts); 7885ab09d6aSIrina Tirdea 7895ab09d6aSIrina Tirdea /* Output LOW on the INT pin for 5 ms */ 7905ab09d6aSIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, 0); 7915ab09d6aSIrina Tirdea if (error) { 7925ab09d6aSIrina Tirdea goodix_request_irq(ts); 7935ab09d6aSIrina Tirdea return error; 7945ab09d6aSIrina Tirdea } 7955ab09d6aSIrina Tirdea 7965ab09d6aSIrina Tirdea usleep_range(5000, 6000); 7975ab09d6aSIrina Tirdea 7985ab09d6aSIrina Tirdea error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND, 7995ab09d6aSIrina Tirdea GOODIX_CMD_SCREEN_OFF); 8005ab09d6aSIrina Tirdea if (error) { 8015ab09d6aSIrina Tirdea dev_err(&ts->client->dev, "Screen off command failed\n"); 8025ab09d6aSIrina Tirdea gpiod_direction_input(ts->gpiod_int); 8035ab09d6aSIrina Tirdea goodix_request_irq(ts); 8045ab09d6aSIrina Tirdea return -EAGAIN; 8055ab09d6aSIrina Tirdea } 8065ab09d6aSIrina Tirdea 8075ab09d6aSIrina Tirdea /* 8085ab09d6aSIrina Tirdea * The datasheet specifies that the interval between sending screen-off 8095ab09d6aSIrina Tirdea * command and wake-up should be longer than 58 ms. To avoid waking up 8105ab09d6aSIrina Tirdea * sooner, delay 58ms here. 8115ab09d6aSIrina Tirdea */ 8125ab09d6aSIrina Tirdea msleep(58); 8135ab09d6aSIrina Tirdea return 0; 8145ab09d6aSIrina Tirdea } 8155ab09d6aSIrina Tirdea 8165ab09d6aSIrina Tirdea static int __maybe_unused goodix_resume(struct device *dev) 8175ab09d6aSIrina Tirdea { 8185ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 8195ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 8205ab09d6aSIrina Tirdea int error; 8215ab09d6aSIrina Tirdea 8225ab09d6aSIrina Tirdea if (!ts->gpiod_int || !ts->gpiod_rst) 8235ab09d6aSIrina Tirdea return 0; 8245ab09d6aSIrina Tirdea 8255ab09d6aSIrina Tirdea /* 8265ab09d6aSIrina Tirdea * Exit sleep mode by outputting HIGH level to INT pin 8275ab09d6aSIrina Tirdea * for 2ms~5ms. 8285ab09d6aSIrina Tirdea */ 8295ab09d6aSIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, 1); 8305ab09d6aSIrina Tirdea if (error) 8315ab09d6aSIrina Tirdea return error; 8325ab09d6aSIrina Tirdea 8335ab09d6aSIrina Tirdea usleep_range(2000, 5000); 8345ab09d6aSIrina Tirdea 8355ab09d6aSIrina Tirdea error = goodix_int_sync(ts); 8365ab09d6aSIrina Tirdea if (error) 8375ab09d6aSIrina Tirdea return error; 8385ab09d6aSIrina Tirdea 8395ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 8405ab09d6aSIrina Tirdea if (error) 8415ab09d6aSIrina Tirdea return error; 8425ab09d6aSIrina Tirdea 8435ab09d6aSIrina Tirdea return 0; 8445ab09d6aSIrina Tirdea } 8455ab09d6aSIrina Tirdea 8465ab09d6aSIrina Tirdea static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume); 8475ab09d6aSIrina Tirdea 848ca96ea86SBastien Nocera static const struct i2c_device_id goodix_ts_id[] = { 849ca96ea86SBastien Nocera { "GDIX1001:00", 0 }, 850ca96ea86SBastien Nocera { } 851ca96ea86SBastien Nocera }; 8522e9e910eSJavier Martinez Canillas MODULE_DEVICE_TABLE(i2c, goodix_ts_id); 853ca96ea86SBastien Nocera 854771d8f1bSAleksei Mamlin #ifdef CONFIG_ACPI 855ca96ea86SBastien Nocera static const struct acpi_device_id goodix_acpi_match[] = { 856ca96ea86SBastien Nocera { "GDIX1001", 0 }, 857ca96ea86SBastien Nocera { } 858ca96ea86SBastien Nocera }; 859ca96ea86SBastien Nocera MODULE_DEVICE_TABLE(acpi, goodix_acpi_match); 860771d8f1bSAleksei Mamlin #endif 861771d8f1bSAleksei Mamlin 862771d8f1bSAleksei Mamlin #ifdef CONFIG_OF 863771d8f1bSAleksei Mamlin static const struct of_device_id goodix_of_match[] = { 864771d8f1bSAleksei Mamlin { .compatible = "goodix,gt911" }, 865771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9110" }, 866771d8f1bSAleksei Mamlin { .compatible = "goodix,gt912" }, 867771d8f1bSAleksei Mamlin { .compatible = "goodix,gt927" }, 868771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9271" }, 869771d8f1bSAleksei Mamlin { .compatible = "goodix,gt928" }, 870771d8f1bSAleksei Mamlin { .compatible = "goodix,gt967" }, 871771d8f1bSAleksei Mamlin { } 872771d8f1bSAleksei Mamlin }; 873771d8f1bSAleksei Mamlin MODULE_DEVICE_TABLE(of, goodix_of_match); 874771d8f1bSAleksei Mamlin #endif 875ca96ea86SBastien Nocera 876ca96ea86SBastien Nocera static struct i2c_driver goodix_ts_driver = { 877ca96ea86SBastien Nocera .probe = goodix_ts_probe, 87868caf858SIrina Tirdea .remove = goodix_ts_remove, 879ca96ea86SBastien Nocera .id_table = goodix_ts_id, 880ca96ea86SBastien Nocera .driver = { 881ca96ea86SBastien Nocera .name = "Goodix-TS", 882771d8f1bSAleksei Mamlin .acpi_match_table = ACPI_PTR(goodix_acpi_match), 883771d8f1bSAleksei Mamlin .of_match_table = of_match_ptr(goodix_of_match), 8845ab09d6aSIrina Tirdea .pm = &goodix_pm_ops, 885ca96ea86SBastien Nocera }, 886ca96ea86SBastien Nocera }; 887ca96ea86SBastien Nocera module_i2c_driver(goodix_ts_driver); 888ca96ea86SBastien Nocera 889ca96ea86SBastien Nocera MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); 890ca96ea86SBastien Nocera MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>"); 891ca96ea86SBastien Nocera MODULE_DESCRIPTION("Goodix touchscreen driver"); 892ca96ea86SBastien Nocera MODULE_LICENSE("GPL v2"); 893