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 3425309004SMarcin Niestroj struct goodix_ts_data; 3525309004SMarcin Niestroj 3625309004SMarcin Niestroj struct goodix_chip_data { 3725309004SMarcin Niestroj u16 config_addr; 3825309004SMarcin Niestroj int config_len; 3925309004SMarcin Niestroj int (*check_config)(struct goodix_ts_data *, const struct firmware *); 4025309004SMarcin Niestroj }; 4125309004SMarcin Niestroj 42ca96ea86SBastien Nocera struct goodix_ts_data { 43ca96ea86SBastien Nocera struct i2c_client *client; 44ca96ea86SBastien Nocera struct input_dev *input_dev; 4525309004SMarcin Niestroj const struct goodix_chip_data *chip; 46ca96ea86SBastien Nocera int abs_x_max; 47ca96ea86SBastien Nocera int abs_y_max; 48ad48cf5eSKarsten Merker bool swapped_x_y; 49ad48cf5eSKarsten Merker bool inverted_x; 50ad48cf5eSKarsten Merker bool inverted_y; 51ca96ea86SBastien Nocera unsigned int max_touch_num; 52ca96ea86SBastien Nocera unsigned int int_trigger_type; 53ec6e1b40SIrina Tirdea struct gpio_desc *gpiod_int; 54ec6e1b40SIrina Tirdea struct gpio_desc *gpiod_rst; 5568caf858SIrina Tirdea u16 id; 5668caf858SIrina Tirdea u16 version; 5768caf858SIrina Tirdea const char *cfg_name; 5868caf858SIrina Tirdea struct completion firmware_loading_complete; 595ab09d6aSIrina Tirdea unsigned long irq_flags; 60ca96ea86SBastien Nocera }; 61ca96ea86SBastien Nocera 62ec6e1b40SIrina Tirdea #define GOODIX_GPIO_INT_NAME "irq" 63ec6e1b40SIrina Tirdea #define GOODIX_GPIO_RST_NAME "reset" 64ec6e1b40SIrina Tirdea 65ca96ea86SBastien Nocera #define GOODIX_MAX_HEIGHT 4096 66ca96ea86SBastien Nocera #define GOODIX_MAX_WIDTH 4096 67ca96ea86SBastien Nocera #define GOODIX_INT_TRIGGER 1 68ca96ea86SBastien Nocera #define GOODIX_CONTACT_SIZE 8 69ca96ea86SBastien Nocera #define GOODIX_MAX_CONTACTS 10 70ca96ea86SBastien Nocera 71ca96ea86SBastien Nocera #define GOODIX_CONFIG_MAX_LENGTH 240 72a779fbc6SIrina Tirdea #define GOODIX_CONFIG_911_LENGTH 186 73a779fbc6SIrina Tirdea #define GOODIX_CONFIG_967_LENGTH 228 74ca96ea86SBastien Nocera 75ca96ea86SBastien Nocera /* Register defines */ 765ab09d6aSIrina Tirdea #define GOODIX_REG_COMMAND 0x8040 775ab09d6aSIrina Tirdea #define GOODIX_CMD_SCREEN_OFF 0x05 785ab09d6aSIrina Tirdea 79ca96ea86SBastien Nocera #define GOODIX_READ_COOR_ADDR 0x814E 8025309004SMarcin Niestroj #define GOODIX_GT1X_REG_CONFIG_DATA 0x8050 8125309004SMarcin Niestroj #define GOODIX_GT9X_REG_CONFIG_DATA 0x8047 82e70b0307SIrina Tirdea #define GOODIX_REG_ID 0x8140 83ca96ea86SBastien Nocera 849b5db7aaSPaul Cercueil #define GOODIX_BUFFER_STATUS_READY BIT(7) 859b5db7aaSPaul Cercueil #define GOODIX_BUFFER_STATUS_TIMEOUT 20 869b5db7aaSPaul Cercueil 87ca96ea86SBastien Nocera #define RESOLUTION_LOC 1 88a7ac7c95SAleksei Mamlin #define MAX_CONTACTS_LOC 5 89ca96ea86SBastien Nocera #define TRIGGER_LOC 6 90ca96ea86SBastien Nocera 9125309004SMarcin Niestroj static int goodix_check_cfg_8(struct goodix_ts_data *ts, 9225309004SMarcin Niestroj const struct firmware *cfg); 9325309004SMarcin Niestroj static int goodix_check_cfg_16(struct goodix_ts_data *ts, 9425309004SMarcin Niestroj const struct firmware *cfg); 9525309004SMarcin Niestroj 9625309004SMarcin Niestroj static const struct goodix_chip_data gt1x_chip_data = { 9725309004SMarcin Niestroj .config_addr = GOODIX_GT1X_REG_CONFIG_DATA, 9825309004SMarcin Niestroj .config_len = GOODIX_CONFIG_MAX_LENGTH, 9925309004SMarcin Niestroj .check_config = goodix_check_cfg_16, 10025309004SMarcin Niestroj }; 10125309004SMarcin Niestroj 10225309004SMarcin Niestroj static const struct goodix_chip_data gt911_chip_data = { 10325309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 10425309004SMarcin Niestroj .config_len = GOODIX_CONFIG_911_LENGTH, 10525309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 10625309004SMarcin Niestroj }; 10725309004SMarcin Niestroj 10825309004SMarcin Niestroj static const struct goodix_chip_data gt967_chip_data = { 10925309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 11025309004SMarcin Niestroj .config_len = GOODIX_CONFIG_967_LENGTH, 11125309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 11225309004SMarcin Niestroj }; 11325309004SMarcin Niestroj 11425309004SMarcin Niestroj static const struct goodix_chip_data gt9x_chip_data = { 11525309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 11625309004SMarcin Niestroj .config_len = GOODIX_CONFIG_MAX_LENGTH, 11725309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 11825309004SMarcin Niestroj }; 11925309004SMarcin Niestroj 120ca96ea86SBastien Nocera static const unsigned long goodix_irq_flags[] = { 121ca96ea86SBastien Nocera IRQ_TYPE_EDGE_RISING, 122ca96ea86SBastien Nocera IRQ_TYPE_EDGE_FALLING, 123ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_LOW, 124ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_HIGH, 125ca96ea86SBastien Nocera }; 126ca96ea86SBastien Nocera 1278b5a359cSBastien Nocera /* 1288b5a359cSBastien Nocera * Those tablets have their coordinates origin at the bottom right 1298b5a359cSBastien Nocera * of the tablet, as if rotated 180 degrees 1308b5a359cSBastien Nocera */ 1318b5a359cSBastien Nocera static const struct dmi_system_id rotated_screen[] = { 1328b5a359cSBastien Nocera #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1338b5a359cSBastien Nocera { 1348b5a359cSBastien Nocera .ident = "WinBook TW100", 1358b5a359cSBastien Nocera .matches = { 1368b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 1378b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW100") 1388b5a359cSBastien Nocera } 1398b5a359cSBastien Nocera }, 1408b5a359cSBastien Nocera { 1418b5a359cSBastien Nocera .ident = "WinBook TW700", 1428b5a359cSBastien Nocera .matches = { 1438b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 1448b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW700") 1458b5a359cSBastien Nocera }, 1468b5a359cSBastien Nocera }, 1478b5a359cSBastien Nocera #endif 1488b5a359cSBastien Nocera {} 1498b5a359cSBastien Nocera }; 1508b5a359cSBastien Nocera 151ca96ea86SBastien Nocera /** 152ca96ea86SBastien Nocera * goodix_i2c_read - read data from a register of the i2c slave device. 153ca96ea86SBastien Nocera * 154ca96ea86SBastien Nocera * @client: i2c device. 155ca96ea86SBastien Nocera * @reg: the register to read from. 156ca96ea86SBastien Nocera * @buf: raw write data buffer. 157ca96ea86SBastien Nocera * @len: length of the buffer to write 158ca96ea86SBastien Nocera */ 159ca96ea86SBastien Nocera static int goodix_i2c_read(struct i2c_client *client, 160ca96ea86SBastien Nocera u16 reg, u8 *buf, int len) 161ca96ea86SBastien Nocera { 162ca96ea86SBastien Nocera struct i2c_msg msgs[2]; 163ca96ea86SBastien Nocera u16 wbuf = cpu_to_be16(reg); 164ca96ea86SBastien Nocera int ret; 165ca96ea86SBastien Nocera 166ca96ea86SBastien Nocera msgs[0].flags = 0; 167ca96ea86SBastien Nocera msgs[0].addr = client->addr; 168ca96ea86SBastien Nocera msgs[0].len = 2; 169ca96ea86SBastien Nocera msgs[0].buf = (u8 *)&wbuf; 170ca96ea86SBastien Nocera 171ca96ea86SBastien Nocera msgs[1].flags = I2C_M_RD; 172ca96ea86SBastien Nocera msgs[1].addr = client->addr; 173ca96ea86SBastien Nocera msgs[1].len = len; 174ca96ea86SBastien Nocera msgs[1].buf = buf; 175ca96ea86SBastien Nocera 176ca96ea86SBastien Nocera ret = i2c_transfer(client->adapter, msgs, 2); 177ca96ea86SBastien Nocera return ret < 0 ? ret : (ret != ARRAY_SIZE(msgs) ? -EIO : 0); 178ca96ea86SBastien Nocera } 179ca96ea86SBastien Nocera 18068caf858SIrina Tirdea /** 18168caf858SIrina Tirdea * goodix_i2c_write - write data to a register of the i2c slave device. 18268caf858SIrina Tirdea * 18368caf858SIrina Tirdea * @client: i2c device. 18468caf858SIrina Tirdea * @reg: the register to write to. 18568caf858SIrina Tirdea * @buf: raw data buffer to write. 18668caf858SIrina Tirdea * @len: length of the buffer to write 18768caf858SIrina Tirdea */ 18868caf858SIrina Tirdea static int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf, 18968caf858SIrina Tirdea unsigned len) 19068caf858SIrina Tirdea { 19168caf858SIrina Tirdea u8 *addr_buf; 19268caf858SIrina Tirdea struct i2c_msg msg; 19368caf858SIrina Tirdea int ret; 19468caf858SIrina Tirdea 19568caf858SIrina Tirdea addr_buf = kmalloc(len + 2, GFP_KERNEL); 19668caf858SIrina Tirdea if (!addr_buf) 19768caf858SIrina Tirdea return -ENOMEM; 19868caf858SIrina Tirdea 19968caf858SIrina Tirdea addr_buf[0] = reg >> 8; 20068caf858SIrina Tirdea addr_buf[1] = reg & 0xFF; 20168caf858SIrina Tirdea memcpy(&addr_buf[2], buf, len); 20268caf858SIrina Tirdea 20368caf858SIrina Tirdea msg.flags = 0; 20468caf858SIrina Tirdea msg.addr = client->addr; 20568caf858SIrina Tirdea msg.buf = addr_buf; 20668caf858SIrina Tirdea msg.len = len + 2; 20768caf858SIrina Tirdea 20868caf858SIrina Tirdea ret = i2c_transfer(client->adapter, &msg, 1); 20968caf858SIrina Tirdea kfree(addr_buf); 21068caf858SIrina Tirdea return ret < 0 ? ret : (ret != 1 ? -EIO : 0); 21168caf858SIrina Tirdea } 21268caf858SIrina Tirdea 2135ab09d6aSIrina Tirdea static int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value) 2145ab09d6aSIrina Tirdea { 2155ab09d6aSIrina Tirdea return goodix_i2c_write(client, reg, &value, sizeof(value)); 2165ab09d6aSIrina Tirdea } 2175ab09d6aSIrina Tirdea 21825309004SMarcin Niestroj static const struct goodix_chip_data *goodix_get_chip_data(u16 id) 219a779fbc6SIrina Tirdea { 220a779fbc6SIrina Tirdea switch (id) { 22125309004SMarcin Niestroj case 1151: 22225309004SMarcin Niestroj return >1x_chip_data; 22325309004SMarcin Niestroj 224a779fbc6SIrina Tirdea case 911: 225a779fbc6SIrina Tirdea case 9271: 226a779fbc6SIrina Tirdea case 9110: 227a779fbc6SIrina Tirdea case 927: 228a779fbc6SIrina Tirdea case 928: 22925309004SMarcin Niestroj return >911_chip_data; 230a779fbc6SIrina Tirdea 231a779fbc6SIrina Tirdea case 912: 232a779fbc6SIrina Tirdea case 967: 23325309004SMarcin Niestroj return >967_chip_data; 234a779fbc6SIrina Tirdea 235a779fbc6SIrina Tirdea default: 23625309004SMarcin Niestroj return >9x_chip_data; 237a779fbc6SIrina Tirdea } 238a779fbc6SIrina Tirdea } 239a779fbc6SIrina Tirdea 240ca96ea86SBastien Nocera static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data) 241ca96ea86SBastien Nocera { 2429b5db7aaSPaul Cercueil unsigned long max_timeout; 243ca96ea86SBastien Nocera int touch_num; 244ca96ea86SBastien Nocera int error; 245ca96ea86SBastien Nocera 2469b5db7aaSPaul Cercueil /* 2479b5db7aaSPaul Cercueil * The 'buffer status' bit, which indicates that the data is valid, is 2489b5db7aaSPaul Cercueil * not set as soon as the interrupt is raised, but slightly after. 2499b5db7aaSPaul Cercueil * This takes around 10 ms to happen, so we poll for 20 ms. 2509b5db7aaSPaul Cercueil */ 2519b5db7aaSPaul Cercueil max_timeout = jiffies + msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT); 2529b5db7aaSPaul Cercueil do { 2539b5db7aaSPaul Cercueil error = goodix_i2c_read(ts->client, GOODIX_READ_COOR_ADDR, 2549b5db7aaSPaul Cercueil data, GOODIX_CONTACT_SIZE + 1); 255ca96ea86SBastien Nocera if (error) { 2569b5db7aaSPaul Cercueil dev_err(&ts->client->dev, "I2C transfer error: %d\n", 2579b5db7aaSPaul Cercueil error); 258ca96ea86SBastien Nocera return error; 259ca96ea86SBastien Nocera } 260ca96ea86SBastien Nocera 2619b5db7aaSPaul Cercueil if (data[0] & GOODIX_BUFFER_STATUS_READY) { 262ca96ea86SBastien Nocera touch_num = data[0] & 0x0f; 263a7ac7c95SAleksei Mamlin if (touch_num > ts->max_touch_num) 264ca96ea86SBastien Nocera return -EPROTO; 265ca96ea86SBastien Nocera 266ca96ea86SBastien Nocera if (touch_num > 1) { 267ca96ea86SBastien Nocera data += 1 + GOODIX_CONTACT_SIZE; 268ca96ea86SBastien Nocera error = goodix_i2c_read(ts->client, 269ca96ea86SBastien Nocera GOODIX_READ_COOR_ADDR + 270ca96ea86SBastien Nocera 1 + GOODIX_CONTACT_SIZE, 271ca96ea86SBastien Nocera data, 2729b5db7aaSPaul Cercueil GOODIX_CONTACT_SIZE * 2739b5db7aaSPaul Cercueil (touch_num - 1)); 274ca96ea86SBastien Nocera if (error) 275ca96ea86SBastien Nocera return error; 276ca96ea86SBastien Nocera } 277ca96ea86SBastien Nocera 278ca96ea86SBastien Nocera return touch_num; 279ca96ea86SBastien Nocera } 280ca96ea86SBastien Nocera 2819b5db7aaSPaul Cercueil usleep_range(1000, 2000); /* Poll every 1 - 2 ms */ 2829b5db7aaSPaul Cercueil } while (time_before(jiffies, max_timeout)); 2839b5db7aaSPaul Cercueil 2849b5db7aaSPaul Cercueil /* 2859b5db7aaSPaul Cercueil * The Goodix panel will send spurious interrupts after a 2869b5db7aaSPaul Cercueil * 'finger up' event, which will always cause a timeout. 2879b5db7aaSPaul Cercueil */ 2889b5db7aaSPaul Cercueil return 0; 2899b5db7aaSPaul Cercueil } 2909b5db7aaSPaul Cercueil 291ca96ea86SBastien Nocera static void goodix_ts_report_touch(struct goodix_ts_data *ts, u8 *coor_data) 292ca96ea86SBastien Nocera { 293ca96ea86SBastien Nocera int id = coor_data[0] & 0x0F; 294ca96ea86SBastien Nocera int input_x = get_unaligned_le16(&coor_data[1]); 295ca96ea86SBastien Nocera int input_y = get_unaligned_le16(&coor_data[3]); 296ca96ea86SBastien Nocera int input_w = get_unaligned_le16(&coor_data[5]); 297ca96ea86SBastien Nocera 298ad48cf5eSKarsten Merker /* Inversions have to happen before axis swapping */ 299ad48cf5eSKarsten Merker if (ts->inverted_x) 300ad48cf5eSKarsten Merker input_x = ts->abs_x_max - input_x; 301ad48cf5eSKarsten Merker if (ts->inverted_y) 302ad48cf5eSKarsten Merker input_y = ts->abs_y_max - input_y; 303ad48cf5eSKarsten Merker if (ts->swapped_x_y) 304ad48cf5eSKarsten Merker swap(input_x, input_y); 305ad48cf5eSKarsten Merker 306ca96ea86SBastien Nocera input_mt_slot(ts->input_dev, id); 307ca96ea86SBastien Nocera input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 308ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_POSITION_X, input_x); 309ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_POSITION_Y, input_y); 310ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 311ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 312ca96ea86SBastien Nocera } 313ca96ea86SBastien Nocera 314ca96ea86SBastien Nocera /** 315ca96ea86SBastien Nocera * goodix_process_events - Process incoming events 316ca96ea86SBastien Nocera * 317ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 318ca96ea86SBastien Nocera * 319ca96ea86SBastien Nocera * Called when the IRQ is triggered. Read the current device state, and push 320ca96ea86SBastien Nocera * the input events to the user space. 321ca96ea86SBastien Nocera */ 322ca96ea86SBastien Nocera static void goodix_process_events(struct goodix_ts_data *ts) 323ca96ea86SBastien Nocera { 3240e0432f0SIrina Tirdea u8 point_data[1 + GOODIX_CONTACT_SIZE * GOODIX_MAX_CONTACTS]; 325ca96ea86SBastien Nocera int touch_num; 326ca96ea86SBastien Nocera int i; 327ca96ea86SBastien Nocera 328ca96ea86SBastien Nocera touch_num = goodix_ts_read_input_report(ts, point_data); 329ca96ea86SBastien Nocera if (touch_num < 0) 330ca96ea86SBastien Nocera return; 331ca96ea86SBastien Nocera 3324a54feeaSSergei A. Trusov /* 3334a54feeaSSergei A. Trusov * Bit 4 of the first byte reports the status of the capacitive 3344a54feeaSSergei A. Trusov * Windows/Home button. 3354a54feeaSSergei A. Trusov */ 3364a54feeaSSergei A. Trusov input_report_key(ts->input_dev, KEY_LEFTMETA, point_data[0] & BIT(4)); 3374a54feeaSSergei A. Trusov 338ca96ea86SBastien Nocera for (i = 0; i < touch_num; i++) 339ca96ea86SBastien Nocera goodix_ts_report_touch(ts, 340ca96ea86SBastien Nocera &point_data[1 + GOODIX_CONTACT_SIZE * i]); 341ca96ea86SBastien Nocera 342ca96ea86SBastien Nocera input_mt_sync_frame(ts->input_dev); 343ca96ea86SBastien Nocera input_sync(ts->input_dev); 344ca96ea86SBastien Nocera } 345ca96ea86SBastien Nocera 346ca96ea86SBastien Nocera /** 347ca96ea86SBastien Nocera * goodix_ts_irq_handler - The IRQ handler 348ca96ea86SBastien Nocera * 349ca96ea86SBastien Nocera * @irq: interrupt number. 350ca96ea86SBastien Nocera * @dev_id: private data pointer. 351ca96ea86SBastien Nocera */ 352ca96ea86SBastien Nocera static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id) 353ca96ea86SBastien Nocera { 354ca96ea86SBastien Nocera struct goodix_ts_data *ts = dev_id; 355ca96ea86SBastien Nocera 356ca96ea86SBastien Nocera goodix_process_events(ts); 357ca96ea86SBastien Nocera 3585d655b35SIrina Tirdea if (goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0) < 0) 359ca96ea86SBastien Nocera dev_err(&ts->client->dev, "I2C write end_cmd error\n"); 360ca96ea86SBastien Nocera 361ca96ea86SBastien Nocera return IRQ_HANDLED; 362ca96ea86SBastien Nocera } 363ca96ea86SBastien Nocera 3645ab09d6aSIrina Tirdea static void goodix_free_irq(struct goodix_ts_data *ts) 3655ab09d6aSIrina Tirdea { 3665ab09d6aSIrina Tirdea devm_free_irq(&ts->client->dev, ts->client->irq, ts); 3675ab09d6aSIrina Tirdea } 3685ab09d6aSIrina Tirdea 3695ab09d6aSIrina Tirdea static int goodix_request_irq(struct goodix_ts_data *ts) 3705ab09d6aSIrina Tirdea { 3715ab09d6aSIrina Tirdea return devm_request_threaded_irq(&ts->client->dev, ts->client->irq, 3725ab09d6aSIrina Tirdea NULL, goodix_ts_irq_handler, 3735ab09d6aSIrina Tirdea ts->irq_flags, ts->client->name, ts); 3745ab09d6aSIrina Tirdea } 3755ab09d6aSIrina Tirdea 37625309004SMarcin Niestroj static int goodix_check_cfg_8(struct goodix_ts_data *ts, 37768caf858SIrina Tirdea const struct firmware *cfg) 37868caf858SIrina Tirdea { 37925309004SMarcin Niestroj int i, raw_cfg_len = cfg->size - 2; 38068caf858SIrina Tirdea u8 check_sum = 0; 38168caf858SIrina Tirdea 38268caf858SIrina Tirdea for (i = 0; i < raw_cfg_len; i++) 38368caf858SIrina Tirdea check_sum += cfg->data[i]; 38468caf858SIrina Tirdea check_sum = (~check_sum) + 1; 38568caf858SIrina Tirdea if (check_sum != cfg->data[raw_cfg_len]) { 38668caf858SIrina Tirdea dev_err(&ts->client->dev, 38768caf858SIrina Tirdea "The checksum of the config fw is not correct"); 38868caf858SIrina Tirdea return -EINVAL; 38968caf858SIrina Tirdea } 39068caf858SIrina Tirdea 39168caf858SIrina Tirdea if (cfg->data[raw_cfg_len + 1] != 1) { 39268caf858SIrina Tirdea dev_err(&ts->client->dev, 39368caf858SIrina Tirdea "Config fw must have Config_Fresh register set"); 39468caf858SIrina Tirdea return -EINVAL; 39568caf858SIrina Tirdea } 39668caf858SIrina Tirdea 39768caf858SIrina Tirdea return 0; 39868caf858SIrina Tirdea } 39968caf858SIrina Tirdea 40025309004SMarcin Niestroj static int goodix_check_cfg_16(struct goodix_ts_data *ts, 40125309004SMarcin Niestroj const struct firmware *cfg) 40225309004SMarcin Niestroj { 40325309004SMarcin Niestroj int i, raw_cfg_len = cfg->size - 3; 40425309004SMarcin Niestroj u16 check_sum = 0; 40525309004SMarcin Niestroj 40625309004SMarcin Niestroj for (i = 0; i < raw_cfg_len; i += 2) 40725309004SMarcin Niestroj check_sum += get_unaligned_be16(&cfg->data[i]); 40825309004SMarcin Niestroj check_sum = (~check_sum) + 1; 40925309004SMarcin Niestroj if (check_sum != get_unaligned_be16(&cfg->data[raw_cfg_len])) { 41025309004SMarcin Niestroj dev_err(&ts->client->dev, 41125309004SMarcin Niestroj "The checksum of the config fw is not correct"); 41225309004SMarcin Niestroj return -EINVAL; 41325309004SMarcin Niestroj } 41425309004SMarcin Niestroj 41525309004SMarcin Niestroj if (cfg->data[raw_cfg_len + 2] != 1) { 41625309004SMarcin Niestroj dev_err(&ts->client->dev, 41725309004SMarcin Niestroj "Config fw must have Config_Fresh register set"); 41825309004SMarcin Niestroj return -EINVAL; 41925309004SMarcin Niestroj } 42025309004SMarcin Niestroj 42125309004SMarcin Niestroj return 0; 42225309004SMarcin Niestroj } 42325309004SMarcin Niestroj 42425309004SMarcin Niestroj /** 42525309004SMarcin Niestroj * goodix_check_cfg - Checks if config fw is valid 42625309004SMarcin Niestroj * 42725309004SMarcin Niestroj * @ts: goodix_ts_data pointer 42825309004SMarcin Niestroj * @cfg: firmware config data 42925309004SMarcin Niestroj */ 43025309004SMarcin Niestroj static int goodix_check_cfg(struct goodix_ts_data *ts, 43125309004SMarcin Niestroj const struct firmware *cfg) 43225309004SMarcin Niestroj { 43325309004SMarcin Niestroj if (cfg->size > GOODIX_CONFIG_MAX_LENGTH) { 43425309004SMarcin Niestroj dev_err(&ts->client->dev, 43525309004SMarcin Niestroj "The length of the config fw is not correct"); 43625309004SMarcin Niestroj return -EINVAL; 43725309004SMarcin Niestroj } 43825309004SMarcin Niestroj 43925309004SMarcin Niestroj return ts->chip->check_config(ts, cfg); 44025309004SMarcin Niestroj } 44125309004SMarcin Niestroj 44268caf858SIrina Tirdea /** 44368caf858SIrina Tirdea * goodix_send_cfg - Write fw config to device 44468caf858SIrina Tirdea * 44568caf858SIrina Tirdea * @ts: goodix_ts_data pointer 44668caf858SIrina Tirdea * @cfg: config firmware to write to device 44768caf858SIrina Tirdea */ 44868caf858SIrina Tirdea static int goodix_send_cfg(struct goodix_ts_data *ts, 44968caf858SIrina Tirdea const struct firmware *cfg) 45068caf858SIrina Tirdea { 45168caf858SIrina Tirdea int error; 45268caf858SIrina Tirdea 45368caf858SIrina Tirdea error = goodix_check_cfg(ts, cfg); 45468caf858SIrina Tirdea if (error) 45568caf858SIrina Tirdea return error; 45668caf858SIrina Tirdea 45725309004SMarcin Niestroj error = goodix_i2c_write(ts->client, ts->chip->config_addr, cfg->data, 45868caf858SIrina Tirdea cfg->size); 45968caf858SIrina Tirdea if (error) { 46068caf858SIrina Tirdea dev_err(&ts->client->dev, "Failed to write config data: %d", 46168caf858SIrina Tirdea error); 46268caf858SIrina Tirdea return error; 46368caf858SIrina Tirdea } 46468caf858SIrina Tirdea dev_dbg(&ts->client->dev, "Config sent successfully."); 46568caf858SIrina Tirdea 46668caf858SIrina Tirdea /* Let the firmware reconfigure itself, so sleep for 10ms */ 46768caf858SIrina Tirdea usleep_range(10000, 11000); 46868caf858SIrina Tirdea 46968caf858SIrina Tirdea return 0; 47068caf858SIrina Tirdea } 47168caf858SIrina Tirdea 472ec6e1b40SIrina Tirdea static int goodix_int_sync(struct goodix_ts_data *ts) 473ec6e1b40SIrina Tirdea { 474ec6e1b40SIrina Tirdea int error; 475ec6e1b40SIrina Tirdea 476ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, 0); 477ec6e1b40SIrina Tirdea if (error) 478ec6e1b40SIrina Tirdea return error; 479ec6e1b40SIrina Tirdea 480ec6e1b40SIrina Tirdea msleep(50); /* T5: 50ms */ 481ec6e1b40SIrina Tirdea 482ec6e1b40SIrina Tirdea error = gpiod_direction_input(ts->gpiod_int); 483ec6e1b40SIrina Tirdea if (error) 484ec6e1b40SIrina Tirdea return error; 485ec6e1b40SIrina Tirdea 486ec6e1b40SIrina Tirdea return 0; 487ec6e1b40SIrina Tirdea } 488ec6e1b40SIrina Tirdea 489ec6e1b40SIrina Tirdea /** 490ec6e1b40SIrina Tirdea * goodix_reset - Reset device during power on 491ec6e1b40SIrina Tirdea * 492ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 493ec6e1b40SIrina Tirdea */ 494ec6e1b40SIrina Tirdea static int goodix_reset(struct goodix_ts_data *ts) 495ec6e1b40SIrina Tirdea { 496ec6e1b40SIrina Tirdea int error; 497ec6e1b40SIrina Tirdea 498ec6e1b40SIrina Tirdea /* begin select I2C slave addr */ 499ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 0); 500ec6e1b40SIrina Tirdea if (error) 501ec6e1b40SIrina Tirdea return error; 502ec6e1b40SIrina Tirdea 503ec6e1b40SIrina Tirdea msleep(20); /* T2: > 10ms */ 504ec6e1b40SIrina Tirdea 505ec6e1b40SIrina Tirdea /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */ 506ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, ts->client->addr == 0x14); 507ec6e1b40SIrina Tirdea if (error) 508ec6e1b40SIrina Tirdea return error; 509ec6e1b40SIrina Tirdea 510ec6e1b40SIrina Tirdea usleep_range(100, 2000); /* T3: > 100us */ 511ec6e1b40SIrina Tirdea 512ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 1); 513ec6e1b40SIrina Tirdea if (error) 514ec6e1b40SIrina Tirdea return error; 515ec6e1b40SIrina Tirdea 516ec6e1b40SIrina Tirdea usleep_range(6000, 10000); /* T4: > 5ms */ 517ec6e1b40SIrina Tirdea 518ec6e1b40SIrina Tirdea /* end select I2C slave addr */ 519ec6e1b40SIrina Tirdea error = gpiod_direction_input(ts->gpiod_rst); 520ec6e1b40SIrina Tirdea if (error) 521ec6e1b40SIrina Tirdea return error; 522ec6e1b40SIrina Tirdea 523ec6e1b40SIrina Tirdea error = goodix_int_sync(ts); 524ec6e1b40SIrina Tirdea if (error) 525ec6e1b40SIrina Tirdea return error; 526ec6e1b40SIrina Tirdea 527ec6e1b40SIrina Tirdea return 0; 528ec6e1b40SIrina Tirdea } 529ec6e1b40SIrina Tirdea 530ec6e1b40SIrina Tirdea /** 531ec6e1b40SIrina Tirdea * goodix_get_gpio_config - Get GPIO config from ACPI/DT 532ec6e1b40SIrina Tirdea * 533ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 534ec6e1b40SIrina Tirdea */ 535ec6e1b40SIrina Tirdea static int goodix_get_gpio_config(struct goodix_ts_data *ts) 536ec6e1b40SIrina Tirdea { 537ec6e1b40SIrina Tirdea int error; 538ec6e1b40SIrina Tirdea struct device *dev; 539ec6e1b40SIrina Tirdea struct gpio_desc *gpiod; 540ec6e1b40SIrina Tirdea 541ec6e1b40SIrina Tirdea if (!ts->client) 542ec6e1b40SIrina Tirdea return -EINVAL; 543ec6e1b40SIrina Tirdea dev = &ts->client->dev; 544ec6e1b40SIrina Tirdea 545ec6e1b40SIrina Tirdea /* Get the interrupt GPIO pin number */ 546ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN); 547ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 548ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 549ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 550ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 551ec6e1b40SIrina Tirdea GOODIX_GPIO_INT_NAME, error); 552ec6e1b40SIrina Tirdea return error; 553ec6e1b40SIrina Tirdea } 554ec6e1b40SIrina Tirdea 555ec6e1b40SIrina Tirdea ts->gpiod_int = gpiod; 556ec6e1b40SIrina Tirdea 557ec6e1b40SIrina Tirdea /* Get the reset line GPIO pin number */ 558ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, GPIOD_IN); 559ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 560ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 561ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 562ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 563ec6e1b40SIrina Tirdea GOODIX_GPIO_RST_NAME, error); 564ec6e1b40SIrina Tirdea return error; 565ec6e1b40SIrina Tirdea } 566ec6e1b40SIrina Tirdea 567ec6e1b40SIrina Tirdea ts->gpiod_rst = gpiod; 568ec6e1b40SIrina Tirdea 569ec6e1b40SIrina Tirdea return 0; 570ec6e1b40SIrina Tirdea } 571ec6e1b40SIrina Tirdea 572ca96ea86SBastien Nocera /** 573ca96ea86SBastien Nocera * goodix_read_config - Read the embedded configuration of the panel 574ca96ea86SBastien Nocera * 575ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 576ca96ea86SBastien Nocera * 577ca96ea86SBastien Nocera * Must be called during probe 578ca96ea86SBastien Nocera */ 579ca96ea86SBastien Nocera static void goodix_read_config(struct goodix_ts_data *ts) 580ca96ea86SBastien Nocera { 581ca96ea86SBastien Nocera u8 config[GOODIX_CONFIG_MAX_LENGTH]; 582ca96ea86SBastien Nocera int error; 583ca96ea86SBastien Nocera 58425309004SMarcin Niestroj error = goodix_i2c_read(ts->client, ts->chip->config_addr, 58525309004SMarcin Niestroj config, ts->chip->config_len); 586ca96ea86SBastien Nocera if (error) { 587ca96ea86SBastien Nocera dev_warn(&ts->client->dev, 588ca96ea86SBastien Nocera "Error reading config (%d), using defaults\n", 589ca96ea86SBastien Nocera error); 590ca96ea86SBastien Nocera ts->abs_x_max = GOODIX_MAX_WIDTH; 591ca96ea86SBastien Nocera ts->abs_y_max = GOODIX_MAX_HEIGHT; 592ad48cf5eSKarsten Merker if (ts->swapped_x_y) 593ad48cf5eSKarsten Merker swap(ts->abs_x_max, ts->abs_y_max); 594ca96ea86SBastien Nocera ts->int_trigger_type = GOODIX_INT_TRIGGER; 595a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 596ca96ea86SBastien Nocera return; 597ca96ea86SBastien Nocera } 598ca96ea86SBastien Nocera 599ca96ea86SBastien Nocera ts->abs_x_max = get_unaligned_le16(&config[RESOLUTION_LOC]); 600ca96ea86SBastien Nocera ts->abs_y_max = get_unaligned_le16(&config[RESOLUTION_LOC + 2]); 601ad48cf5eSKarsten Merker if (ts->swapped_x_y) 602ad48cf5eSKarsten Merker swap(ts->abs_x_max, ts->abs_y_max); 603a7ac7c95SAleksei Mamlin ts->int_trigger_type = config[TRIGGER_LOC] & 0x03; 604a7ac7c95SAleksei Mamlin ts->max_touch_num = config[MAX_CONTACTS_LOC] & 0x0f; 605a7ac7c95SAleksei Mamlin if (!ts->abs_x_max || !ts->abs_y_max || !ts->max_touch_num) { 606ca96ea86SBastien Nocera dev_err(&ts->client->dev, 607ca96ea86SBastien Nocera "Invalid config, using defaults\n"); 608ca96ea86SBastien Nocera ts->abs_x_max = GOODIX_MAX_WIDTH; 609ca96ea86SBastien Nocera ts->abs_y_max = GOODIX_MAX_HEIGHT; 610ad48cf5eSKarsten Merker if (ts->swapped_x_y) 611ad48cf5eSKarsten Merker swap(ts->abs_x_max, ts->abs_y_max); 612a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 613ca96ea86SBastien Nocera } 6148b5a359cSBastien Nocera 61557c80e8eSKarsten Merker if (dmi_check_system(rotated_screen)) { 61657c80e8eSKarsten Merker ts->inverted_x = true; 61757c80e8eSKarsten Merker ts->inverted_y = true; 6188b5a359cSBastien Nocera dev_dbg(&ts->client->dev, 6198b5a359cSBastien Nocera "Applying '180 degrees rotated screen' quirk\n"); 620ca96ea86SBastien Nocera } 62157c80e8eSKarsten Merker } 622ca96ea86SBastien Nocera 623ca96ea86SBastien Nocera /** 624ca96ea86SBastien Nocera * goodix_read_version - Read goodix touchscreen version 625ca96ea86SBastien Nocera * 62668caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 627ca96ea86SBastien Nocera */ 62868caf858SIrina Tirdea static int goodix_read_version(struct goodix_ts_data *ts) 629ca96ea86SBastien Nocera { 630ca96ea86SBastien Nocera int error; 631ca96ea86SBastien Nocera u8 buf[6]; 632e70b0307SIrina Tirdea char id_str[5]; 633ca96ea86SBastien Nocera 63468caf858SIrina Tirdea error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf)); 635ca96ea86SBastien Nocera if (error) { 63668caf858SIrina Tirdea dev_err(&ts->client->dev, "read version failed: %d\n", error); 637ca96ea86SBastien Nocera return error; 638ca96ea86SBastien Nocera } 639ca96ea86SBastien Nocera 640e70b0307SIrina Tirdea memcpy(id_str, buf, 4); 641e70b0307SIrina Tirdea id_str[4] = 0; 64268caf858SIrina Tirdea if (kstrtou16(id_str, 10, &ts->id)) 64368caf858SIrina Tirdea ts->id = 0x1001; 644e70b0307SIrina Tirdea 64568caf858SIrina Tirdea ts->version = get_unaligned_le16(&buf[4]); 646ca96ea86SBastien Nocera 64768caf858SIrina Tirdea dev_info(&ts->client->dev, "ID %d, version: %04x\n", ts->id, 64868caf858SIrina Tirdea ts->version); 649ca96ea86SBastien Nocera 650ca96ea86SBastien Nocera return 0; 651ca96ea86SBastien Nocera } 652ca96ea86SBastien Nocera 653ca96ea86SBastien Nocera /** 654ca96ea86SBastien Nocera * goodix_i2c_test - I2C test function to check if the device answers. 655ca96ea86SBastien Nocera * 656ca96ea86SBastien Nocera * @client: the i2c client 657ca96ea86SBastien Nocera */ 658ca96ea86SBastien Nocera static int goodix_i2c_test(struct i2c_client *client) 659ca96ea86SBastien Nocera { 660ca96ea86SBastien Nocera int retry = 0; 661ca96ea86SBastien Nocera int error; 662ca96ea86SBastien Nocera u8 test; 663ca96ea86SBastien Nocera 664ca96ea86SBastien Nocera while (retry++ < 2) { 66525309004SMarcin Niestroj error = goodix_i2c_read(client, GOODIX_REG_ID, 666ca96ea86SBastien Nocera &test, 1); 667ca96ea86SBastien Nocera if (!error) 668ca96ea86SBastien Nocera return 0; 669ca96ea86SBastien Nocera 670ca96ea86SBastien Nocera dev_err(&client->dev, "i2c test failed attempt %d: %d\n", 671ca96ea86SBastien Nocera retry, error); 672ca96ea86SBastien Nocera msleep(20); 673ca96ea86SBastien Nocera } 674ca96ea86SBastien Nocera 675ca96ea86SBastien Nocera return error; 676ca96ea86SBastien Nocera } 677ca96ea86SBastien Nocera 678ca96ea86SBastien Nocera /** 679ca96ea86SBastien Nocera * goodix_request_input_dev - Allocate, populate and register the input device 680ca96ea86SBastien Nocera * 681ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 682ca96ea86SBastien Nocera * 683ca96ea86SBastien Nocera * Must be called during probe 684ca96ea86SBastien Nocera */ 68568caf858SIrina Tirdea static int goodix_request_input_dev(struct goodix_ts_data *ts) 686ca96ea86SBastien Nocera { 687ca96ea86SBastien Nocera int error; 688ca96ea86SBastien Nocera 689ca96ea86SBastien Nocera ts->input_dev = devm_input_allocate_device(&ts->client->dev); 690ca96ea86SBastien Nocera if (!ts->input_dev) { 691ca96ea86SBastien Nocera dev_err(&ts->client->dev, "Failed to allocate input device."); 692ca96ea86SBastien Nocera return -ENOMEM; 693ca96ea86SBastien Nocera } 694ca96ea86SBastien Nocera 6950dfb35bdSIrina Tirdea input_set_abs_params(ts->input_dev, ABS_MT_POSITION_X, 6960dfb35bdSIrina Tirdea 0, ts->abs_x_max, 0, 0); 6970dfb35bdSIrina Tirdea input_set_abs_params(ts->input_dev, ABS_MT_POSITION_Y, 6980dfb35bdSIrina Tirdea 0, ts->abs_y_max, 0, 0); 699ca96ea86SBastien Nocera input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 700ca96ea86SBastien Nocera input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 701ca96ea86SBastien Nocera 702a7ac7c95SAleksei Mamlin input_mt_init_slots(ts->input_dev, ts->max_touch_num, 703ca96ea86SBastien Nocera INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); 704ca96ea86SBastien Nocera 705ca96ea86SBastien Nocera ts->input_dev->name = "Goodix Capacitive TouchScreen"; 706ca96ea86SBastien Nocera ts->input_dev->phys = "input/ts"; 707ca96ea86SBastien Nocera ts->input_dev->id.bustype = BUS_I2C; 708ca96ea86SBastien Nocera ts->input_dev->id.vendor = 0x0416; 70968caf858SIrina Tirdea ts->input_dev->id.product = ts->id; 71068caf858SIrina Tirdea ts->input_dev->id.version = ts->version; 711ca96ea86SBastien Nocera 7124a54feeaSSergei A. Trusov /* Capacitive Windows/Home button on some devices */ 7134a54feeaSSergei A. Trusov input_set_capability(ts->input_dev, EV_KEY, KEY_LEFTMETA); 7144a54feeaSSergei A. Trusov 715ca96ea86SBastien Nocera error = input_register_device(ts->input_dev); 716ca96ea86SBastien Nocera if (error) { 717ca96ea86SBastien Nocera dev_err(&ts->client->dev, 718ca96ea86SBastien Nocera "Failed to register input device: %d", error); 719ca96ea86SBastien Nocera return error; 720ca96ea86SBastien Nocera } 721ca96ea86SBastien Nocera 722ca96ea86SBastien Nocera return 0; 723ca96ea86SBastien Nocera } 724ca96ea86SBastien Nocera 72568caf858SIrina Tirdea /** 72668caf858SIrina Tirdea * goodix_configure_dev - Finish device initialization 72768caf858SIrina Tirdea * 72868caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 72968caf858SIrina Tirdea * 73068caf858SIrina Tirdea * Must be called from probe to finish initialization of the device. 73168caf858SIrina Tirdea * Contains the common initialization code for both devices that 73268caf858SIrina Tirdea * declare gpio pins and devices that do not. It is either called 73368caf858SIrina Tirdea * directly from probe or from request_firmware_wait callback. 73468caf858SIrina Tirdea */ 73568caf858SIrina Tirdea static int goodix_configure_dev(struct goodix_ts_data *ts) 73668caf858SIrina Tirdea { 73768caf858SIrina Tirdea int error; 73868caf858SIrina Tirdea 739ad48cf5eSKarsten Merker ts->swapped_x_y = device_property_read_bool(&ts->client->dev, 740ad48cf5eSKarsten Merker "touchscreen-swapped-x-y"); 741ad48cf5eSKarsten Merker ts->inverted_x = device_property_read_bool(&ts->client->dev, 742ad48cf5eSKarsten Merker "touchscreen-inverted-x"); 743ad48cf5eSKarsten Merker ts->inverted_y = device_property_read_bool(&ts->client->dev, 744ad48cf5eSKarsten Merker "touchscreen-inverted-y"); 745ad48cf5eSKarsten Merker 74668caf858SIrina Tirdea goodix_read_config(ts); 74768caf858SIrina Tirdea 74868caf858SIrina Tirdea error = goodix_request_input_dev(ts); 74968caf858SIrina Tirdea if (error) 75068caf858SIrina Tirdea return error; 75168caf858SIrina Tirdea 7525ab09d6aSIrina Tirdea ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT; 7535ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 75468caf858SIrina Tirdea if (error) { 75568caf858SIrina Tirdea dev_err(&ts->client->dev, "request IRQ failed: %d\n", error); 75668caf858SIrina Tirdea return error; 75768caf858SIrina Tirdea } 75868caf858SIrina Tirdea 75968caf858SIrina Tirdea return 0; 76068caf858SIrina Tirdea } 76168caf858SIrina Tirdea 76268caf858SIrina Tirdea /** 76368caf858SIrina Tirdea * goodix_config_cb - Callback to finish device init 76468caf858SIrina Tirdea * 76568caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 76668caf858SIrina Tirdea * 76768caf858SIrina Tirdea * request_firmware_wait callback that finishes 76868caf858SIrina Tirdea * initialization of the device. 76968caf858SIrina Tirdea */ 77068caf858SIrina Tirdea static void goodix_config_cb(const struct firmware *cfg, void *ctx) 77168caf858SIrina Tirdea { 77268caf858SIrina Tirdea struct goodix_ts_data *ts = ctx; 77368caf858SIrina Tirdea int error; 77468caf858SIrina Tirdea 77568caf858SIrina Tirdea if (cfg) { 77668caf858SIrina Tirdea /* send device configuration to the firmware */ 77768caf858SIrina Tirdea error = goodix_send_cfg(ts, cfg); 77868caf858SIrina Tirdea if (error) 77968caf858SIrina Tirdea goto err_release_cfg; 78068caf858SIrina Tirdea } 78168caf858SIrina Tirdea 78268caf858SIrina Tirdea goodix_configure_dev(ts); 78368caf858SIrina Tirdea 78468caf858SIrina Tirdea err_release_cfg: 78568caf858SIrina Tirdea release_firmware(cfg); 78668caf858SIrina Tirdea complete_all(&ts->firmware_loading_complete); 78768caf858SIrina Tirdea } 78868caf858SIrina Tirdea 789ca96ea86SBastien Nocera static int goodix_ts_probe(struct i2c_client *client, 790ca96ea86SBastien Nocera const struct i2c_device_id *id) 791ca96ea86SBastien Nocera { 792ca96ea86SBastien Nocera struct goodix_ts_data *ts; 793ca96ea86SBastien Nocera int error; 794ca96ea86SBastien Nocera 795ca96ea86SBastien Nocera dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr); 796ca96ea86SBastien Nocera 797ca96ea86SBastien Nocera if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 798ca96ea86SBastien Nocera dev_err(&client->dev, "I2C check functionality failed.\n"); 799ca96ea86SBastien Nocera return -ENXIO; 800ca96ea86SBastien Nocera } 801ca96ea86SBastien Nocera 802ca96ea86SBastien Nocera ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); 803ca96ea86SBastien Nocera if (!ts) 804ca96ea86SBastien Nocera return -ENOMEM; 805ca96ea86SBastien Nocera 806ca96ea86SBastien Nocera ts->client = client; 807ca96ea86SBastien Nocera i2c_set_clientdata(client, ts); 80868caf858SIrina Tirdea init_completion(&ts->firmware_loading_complete); 809ca96ea86SBastien Nocera 810ec6e1b40SIrina Tirdea error = goodix_get_gpio_config(ts); 811ec6e1b40SIrina Tirdea if (error) 812ec6e1b40SIrina Tirdea return error; 813ec6e1b40SIrina Tirdea 814ec6e1b40SIrina Tirdea if (ts->gpiod_int && ts->gpiod_rst) { 815ec6e1b40SIrina Tirdea /* reset the controller */ 816ec6e1b40SIrina Tirdea error = goodix_reset(ts); 817ec6e1b40SIrina Tirdea if (error) { 818ec6e1b40SIrina Tirdea dev_err(&client->dev, "Controller reset failed.\n"); 819ec6e1b40SIrina Tirdea return error; 820ec6e1b40SIrina Tirdea } 821ec6e1b40SIrina Tirdea } 822ec6e1b40SIrina Tirdea 823ca96ea86SBastien Nocera error = goodix_i2c_test(client); 824ca96ea86SBastien Nocera if (error) { 825ca96ea86SBastien Nocera dev_err(&client->dev, "I2C communication failure: %d\n", error); 826ca96ea86SBastien Nocera return error; 827ca96ea86SBastien Nocera } 828ca96ea86SBastien Nocera 82968caf858SIrina Tirdea error = goodix_read_version(ts); 830ca96ea86SBastien Nocera if (error) { 831ca96ea86SBastien Nocera dev_err(&client->dev, "Read version failed.\n"); 832ca96ea86SBastien Nocera return error; 833ca96ea86SBastien Nocera } 834ca96ea86SBastien Nocera 83525309004SMarcin Niestroj ts->chip = goodix_get_chip_data(ts->id); 836a779fbc6SIrina Tirdea 83768caf858SIrina Tirdea if (ts->gpiod_int && ts->gpiod_rst) { 83868caf858SIrina Tirdea /* update device config */ 83968caf858SIrina Tirdea ts->cfg_name = devm_kasprintf(&client->dev, GFP_KERNEL, 84068caf858SIrina Tirdea "goodix_%d_cfg.bin", ts->id); 84168caf858SIrina Tirdea if (!ts->cfg_name) 84268caf858SIrina Tirdea return -ENOMEM; 843ca96ea86SBastien Nocera 84468caf858SIrina Tirdea error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name, 84568caf858SIrina Tirdea &client->dev, GFP_KERNEL, ts, 84668caf858SIrina Tirdea goodix_config_cb); 847ca96ea86SBastien Nocera if (error) { 84868caf858SIrina Tirdea dev_err(&client->dev, 84968caf858SIrina Tirdea "Failed to invoke firmware loader: %d\n", 85068caf858SIrina Tirdea error); 851ca96ea86SBastien Nocera return error; 852ca96ea86SBastien Nocera } 853ca96ea86SBastien Nocera 854ca96ea86SBastien Nocera return 0; 85568caf858SIrina Tirdea } else { 85668caf858SIrina Tirdea error = goodix_configure_dev(ts); 85768caf858SIrina Tirdea if (error) 85868caf858SIrina Tirdea return error; 85968caf858SIrina Tirdea } 86068caf858SIrina Tirdea 86168caf858SIrina Tirdea return 0; 86268caf858SIrina Tirdea } 86368caf858SIrina Tirdea 86468caf858SIrina Tirdea static int goodix_ts_remove(struct i2c_client *client) 86568caf858SIrina Tirdea { 86668caf858SIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 86768caf858SIrina Tirdea 86868caf858SIrina Tirdea if (ts->gpiod_int && ts->gpiod_rst) 86968caf858SIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 87068caf858SIrina Tirdea 87168caf858SIrina Tirdea return 0; 872ca96ea86SBastien Nocera } 873ca96ea86SBastien Nocera 8745ab09d6aSIrina Tirdea static int __maybe_unused goodix_suspend(struct device *dev) 8755ab09d6aSIrina Tirdea { 8765ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 8775ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 8785ab09d6aSIrina Tirdea int error; 8795ab09d6aSIrina Tirdea 8805ab09d6aSIrina Tirdea /* We need gpio pins to suspend/resume */ 881faec44b6SHans de Goede if (!ts->gpiod_int || !ts->gpiod_rst) { 882faec44b6SHans de Goede disable_irq(client->irq); 8835ab09d6aSIrina Tirdea return 0; 884faec44b6SHans de Goede } 8855ab09d6aSIrina Tirdea 8865ab09d6aSIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 8875ab09d6aSIrina Tirdea 8885ab09d6aSIrina Tirdea /* Free IRQ as IRQ pin is used as output in the suspend sequence */ 8895ab09d6aSIrina Tirdea goodix_free_irq(ts); 8905ab09d6aSIrina Tirdea 8915ab09d6aSIrina Tirdea /* Output LOW on the INT pin for 5 ms */ 8925ab09d6aSIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, 0); 8935ab09d6aSIrina Tirdea if (error) { 8945ab09d6aSIrina Tirdea goodix_request_irq(ts); 8955ab09d6aSIrina Tirdea return error; 8965ab09d6aSIrina Tirdea } 8975ab09d6aSIrina Tirdea 8985ab09d6aSIrina Tirdea usleep_range(5000, 6000); 8995ab09d6aSIrina Tirdea 9005ab09d6aSIrina Tirdea error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND, 9015ab09d6aSIrina Tirdea GOODIX_CMD_SCREEN_OFF); 9025ab09d6aSIrina Tirdea if (error) { 9035ab09d6aSIrina Tirdea dev_err(&ts->client->dev, "Screen off command failed\n"); 9045ab09d6aSIrina Tirdea gpiod_direction_input(ts->gpiod_int); 9055ab09d6aSIrina Tirdea goodix_request_irq(ts); 9065ab09d6aSIrina Tirdea return -EAGAIN; 9075ab09d6aSIrina Tirdea } 9085ab09d6aSIrina Tirdea 9095ab09d6aSIrina Tirdea /* 9105ab09d6aSIrina Tirdea * The datasheet specifies that the interval between sending screen-off 9115ab09d6aSIrina Tirdea * command and wake-up should be longer than 58 ms. To avoid waking up 9125ab09d6aSIrina Tirdea * sooner, delay 58ms here. 9135ab09d6aSIrina Tirdea */ 9145ab09d6aSIrina Tirdea msleep(58); 9155ab09d6aSIrina Tirdea return 0; 9165ab09d6aSIrina Tirdea } 9175ab09d6aSIrina Tirdea 9185ab09d6aSIrina Tirdea static int __maybe_unused goodix_resume(struct device *dev) 9195ab09d6aSIrina Tirdea { 9205ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 9215ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 9225ab09d6aSIrina Tirdea int error; 9235ab09d6aSIrina Tirdea 924faec44b6SHans de Goede if (!ts->gpiod_int || !ts->gpiod_rst) { 925faec44b6SHans de Goede enable_irq(client->irq); 9265ab09d6aSIrina Tirdea return 0; 927faec44b6SHans de Goede } 9285ab09d6aSIrina Tirdea 9295ab09d6aSIrina Tirdea /* 9305ab09d6aSIrina Tirdea * Exit sleep mode by outputting HIGH level to INT pin 9315ab09d6aSIrina Tirdea * for 2ms~5ms. 9325ab09d6aSIrina Tirdea */ 9335ab09d6aSIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, 1); 9345ab09d6aSIrina Tirdea if (error) 9355ab09d6aSIrina Tirdea return error; 9365ab09d6aSIrina Tirdea 9375ab09d6aSIrina Tirdea usleep_range(2000, 5000); 9385ab09d6aSIrina Tirdea 9395ab09d6aSIrina Tirdea error = goodix_int_sync(ts); 9405ab09d6aSIrina Tirdea if (error) 9415ab09d6aSIrina Tirdea return error; 9425ab09d6aSIrina Tirdea 9435ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 9445ab09d6aSIrina Tirdea if (error) 9455ab09d6aSIrina Tirdea return error; 9465ab09d6aSIrina Tirdea 9475ab09d6aSIrina Tirdea return 0; 9485ab09d6aSIrina Tirdea } 9495ab09d6aSIrina Tirdea 9505ab09d6aSIrina Tirdea static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume); 9515ab09d6aSIrina Tirdea 952ca96ea86SBastien Nocera static const struct i2c_device_id goodix_ts_id[] = { 953ca96ea86SBastien Nocera { "GDIX1001:00", 0 }, 954ca96ea86SBastien Nocera { } 955ca96ea86SBastien Nocera }; 9562e9e910eSJavier Martinez Canillas MODULE_DEVICE_TABLE(i2c, goodix_ts_id); 957ca96ea86SBastien Nocera 958771d8f1bSAleksei Mamlin #ifdef CONFIG_ACPI 959ca96ea86SBastien Nocera static const struct acpi_device_id goodix_acpi_match[] = { 960ca96ea86SBastien Nocera { "GDIX1001", 0 }, 961ca96ea86SBastien Nocera { } 962ca96ea86SBastien Nocera }; 963ca96ea86SBastien Nocera MODULE_DEVICE_TABLE(acpi, goodix_acpi_match); 964771d8f1bSAleksei Mamlin #endif 965771d8f1bSAleksei Mamlin 966771d8f1bSAleksei Mamlin #ifdef CONFIG_OF 967771d8f1bSAleksei Mamlin static const struct of_device_id goodix_of_match[] = { 96825309004SMarcin Niestroj { .compatible = "goodix,gt1151" }, 969771d8f1bSAleksei Mamlin { .compatible = "goodix,gt911" }, 970771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9110" }, 971771d8f1bSAleksei Mamlin { .compatible = "goodix,gt912" }, 972771d8f1bSAleksei Mamlin { .compatible = "goodix,gt927" }, 973771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9271" }, 974771d8f1bSAleksei Mamlin { .compatible = "goodix,gt928" }, 975771d8f1bSAleksei Mamlin { .compatible = "goodix,gt967" }, 976771d8f1bSAleksei Mamlin { } 977771d8f1bSAleksei Mamlin }; 978771d8f1bSAleksei Mamlin MODULE_DEVICE_TABLE(of, goodix_of_match); 979771d8f1bSAleksei Mamlin #endif 980ca96ea86SBastien Nocera 981ca96ea86SBastien Nocera static struct i2c_driver goodix_ts_driver = { 982ca96ea86SBastien Nocera .probe = goodix_ts_probe, 98368caf858SIrina Tirdea .remove = goodix_ts_remove, 984ca96ea86SBastien Nocera .id_table = goodix_ts_id, 985ca96ea86SBastien Nocera .driver = { 986ca96ea86SBastien Nocera .name = "Goodix-TS", 987771d8f1bSAleksei Mamlin .acpi_match_table = ACPI_PTR(goodix_acpi_match), 988771d8f1bSAleksei Mamlin .of_match_table = of_match_ptr(goodix_of_match), 9895ab09d6aSIrina Tirdea .pm = &goodix_pm_ops, 990ca96ea86SBastien Nocera }, 991ca96ea86SBastien Nocera }; 992ca96ea86SBastien Nocera module_i2c_driver(goodix_ts_driver); 993ca96ea86SBastien Nocera 994ca96ea86SBastien Nocera MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); 995ca96ea86SBastien Nocera MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>"); 996ca96ea86SBastien Nocera MODULE_DESCRIPTION("Goodix touchscreen driver"); 997ca96ea86SBastien Nocera MODULE_LICENSE("GPL v2"); 998