1b886d83cSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2ca96ea86SBastien Nocera /* 3ca96ea86SBastien Nocera * Driver for Goodix Touchscreens 4ca96ea86SBastien Nocera * 5ca96ea86SBastien Nocera * Copyright (c) 2014 Red Hat Inc. 6ad48cf5eSKarsten Merker * Copyright (c) 2015 K. Merker <merker@debian.org> 7ca96ea86SBastien Nocera * 8ca96ea86SBastien Nocera * This code is based on gt9xx.c authored by andrew@goodix.com: 9ca96ea86SBastien Nocera * 10ca96ea86SBastien Nocera * 2010 - 2012 Goodix Technology. 11ca96ea86SBastien Nocera */ 12ca96ea86SBastien Nocera 13ca96ea86SBastien Nocera 14ca96ea86SBastien Nocera #include <linux/kernel.h> 158b5a359cSBastien Nocera #include <linux/dmi.h> 1668caf858SIrina Tirdea #include <linux/firmware.h> 17ec6e1b40SIrina Tirdea #include <linux/gpio/consumer.h> 18ca96ea86SBastien Nocera #include <linux/i2c.h> 19ca96ea86SBastien Nocera #include <linux/input.h> 20ca96ea86SBastien Nocera #include <linux/input/mt.h> 21fafef982SMarcin Niestroj #include <linux/input/touchscreen.h> 22ca96ea86SBastien Nocera #include <linux/module.h> 23ca96ea86SBastien Nocera #include <linux/delay.h> 24ca96ea86SBastien Nocera #include <linux/irq.h> 25ca96ea86SBastien Nocera #include <linux/interrupt.h> 26ae97fb58SJagan Teki #include <linux/regulator/consumer.h> 27ca96ea86SBastien Nocera #include <linux/slab.h> 28771d8f1bSAleksei Mamlin #include <linux/acpi.h> 29771d8f1bSAleksei Mamlin #include <linux/of.h> 30ca96ea86SBastien Nocera #include <asm/unaligned.h> 31ca96ea86SBastien Nocera 3225309004SMarcin Niestroj struct goodix_ts_data; 3325309004SMarcin Niestroj 3449db3997SHans de Goede enum goodix_irq_pin_access_method { 3549db3997SHans de Goede IRQ_PIN_ACCESS_NONE, 3649db3997SHans de Goede IRQ_PIN_ACCESS_GPIO, 37a7d4b171SHans de Goede IRQ_PIN_ACCESS_ACPI_GPIO, 3849db3997SHans de Goede }; 3949db3997SHans de Goede 4025309004SMarcin Niestroj struct goodix_chip_data { 4125309004SMarcin Niestroj u16 config_addr; 4225309004SMarcin Niestroj int config_len; 4325309004SMarcin Niestroj int (*check_config)(struct goodix_ts_data *, const struct firmware *); 4425309004SMarcin Niestroj }; 4525309004SMarcin Niestroj 46ca96ea86SBastien Nocera struct goodix_ts_data { 47ca96ea86SBastien Nocera struct i2c_client *client; 48ca96ea86SBastien Nocera struct input_dev *input_dev; 4925309004SMarcin Niestroj const struct goodix_chip_data *chip; 50fafef982SMarcin Niestroj struct touchscreen_properties prop; 51ca96ea86SBastien Nocera unsigned int max_touch_num; 52ca96ea86SBastien Nocera unsigned int int_trigger_type; 53ae97fb58SJagan Teki struct regulator *avdd28; 54ae97fb58SJagan Teki struct regulator *vddio; 55ec6e1b40SIrina Tirdea struct gpio_desc *gpiod_int; 56ec6e1b40SIrina Tirdea struct gpio_desc *gpiod_rst; 57a7d4b171SHans de Goede int gpio_count; 58a7d4b171SHans de Goede int gpio_int_idx; 5968caf858SIrina Tirdea u16 id; 6068caf858SIrina Tirdea u16 version; 6168caf858SIrina Tirdea const char *cfg_name; 621921daceSHans de Goede bool reset_controller_at_probe; 63e070a97bSHans de Goede bool load_cfg_from_disk; 6468caf858SIrina Tirdea struct completion firmware_loading_complete; 655ab09d6aSIrina Tirdea unsigned long irq_flags; 6649db3997SHans de Goede enum goodix_irq_pin_access_method irq_pin_access_method; 67bd3b8480SYauhen Kharuzhy unsigned int contact_size; 68ca96ea86SBastien Nocera }; 69ca96ea86SBastien Nocera 70ec6e1b40SIrina Tirdea #define GOODIX_GPIO_INT_NAME "irq" 71ec6e1b40SIrina Tirdea #define GOODIX_GPIO_RST_NAME "reset" 72ec6e1b40SIrina Tirdea 73ca96ea86SBastien Nocera #define GOODIX_MAX_HEIGHT 4096 74ca96ea86SBastien Nocera #define GOODIX_MAX_WIDTH 4096 75ca96ea86SBastien Nocera #define GOODIX_INT_TRIGGER 1 76ca96ea86SBastien Nocera #define GOODIX_CONTACT_SIZE 8 77bd3b8480SYauhen Kharuzhy #define GOODIX_MAX_CONTACT_SIZE 9 78ca96ea86SBastien Nocera #define GOODIX_MAX_CONTACTS 10 79ca96ea86SBastien Nocera 80ca96ea86SBastien Nocera #define GOODIX_CONFIG_MAX_LENGTH 240 81a779fbc6SIrina Tirdea #define GOODIX_CONFIG_911_LENGTH 186 82a779fbc6SIrina Tirdea #define GOODIX_CONFIG_967_LENGTH 228 83ca96ea86SBastien Nocera 84ca96ea86SBastien Nocera /* Register defines */ 855ab09d6aSIrina Tirdea #define GOODIX_REG_COMMAND 0x8040 865ab09d6aSIrina Tirdea #define GOODIX_CMD_SCREEN_OFF 0x05 875ab09d6aSIrina Tirdea 88ca96ea86SBastien Nocera #define GOODIX_READ_COOR_ADDR 0x814E 8925309004SMarcin Niestroj #define GOODIX_GT1X_REG_CONFIG_DATA 0x8050 9025309004SMarcin Niestroj #define GOODIX_GT9X_REG_CONFIG_DATA 0x8047 91e70b0307SIrina Tirdea #define GOODIX_REG_ID 0x8140 92ca96ea86SBastien Nocera 939b5db7aaSPaul Cercueil #define GOODIX_BUFFER_STATUS_READY BIT(7) 949b5db7aaSPaul Cercueil #define GOODIX_BUFFER_STATUS_TIMEOUT 20 959b5db7aaSPaul Cercueil 96ca96ea86SBastien Nocera #define RESOLUTION_LOC 1 97a7ac7c95SAleksei Mamlin #define MAX_CONTACTS_LOC 5 98ca96ea86SBastien Nocera #define TRIGGER_LOC 6 99ca96ea86SBastien Nocera 10025309004SMarcin Niestroj static int goodix_check_cfg_8(struct goodix_ts_data *ts, 10125309004SMarcin Niestroj const struct firmware *cfg); 10225309004SMarcin Niestroj static int goodix_check_cfg_16(struct goodix_ts_data *ts, 10325309004SMarcin Niestroj const struct firmware *cfg); 10425309004SMarcin Niestroj 10525309004SMarcin Niestroj static const struct goodix_chip_data gt1x_chip_data = { 10625309004SMarcin Niestroj .config_addr = GOODIX_GT1X_REG_CONFIG_DATA, 10725309004SMarcin Niestroj .config_len = GOODIX_CONFIG_MAX_LENGTH, 10825309004SMarcin Niestroj .check_config = goodix_check_cfg_16, 10925309004SMarcin Niestroj }; 11025309004SMarcin Niestroj 11125309004SMarcin Niestroj static const struct goodix_chip_data gt911_chip_data = { 11225309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 11325309004SMarcin Niestroj .config_len = GOODIX_CONFIG_911_LENGTH, 11425309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 11525309004SMarcin Niestroj }; 11625309004SMarcin Niestroj 11725309004SMarcin Niestroj static const struct goodix_chip_data gt967_chip_data = { 11825309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 11925309004SMarcin Niestroj .config_len = GOODIX_CONFIG_967_LENGTH, 12025309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 12125309004SMarcin Niestroj }; 12225309004SMarcin Niestroj 12325309004SMarcin Niestroj static const struct goodix_chip_data gt9x_chip_data = { 12425309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 12525309004SMarcin Niestroj .config_len = GOODIX_CONFIG_MAX_LENGTH, 12625309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 12725309004SMarcin Niestroj }; 12825309004SMarcin Niestroj 129ca96ea86SBastien Nocera static const unsigned long goodix_irq_flags[] = { 130ca96ea86SBastien Nocera IRQ_TYPE_EDGE_RISING, 131ca96ea86SBastien Nocera IRQ_TYPE_EDGE_FALLING, 132ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_LOW, 133ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_HIGH, 134ca96ea86SBastien Nocera }; 135ca96ea86SBastien Nocera 1368b5a359cSBastien Nocera /* 1378b5a359cSBastien Nocera * Those tablets have their coordinates origin at the bottom right 1388b5a359cSBastien Nocera * of the tablet, as if rotated 180 degrees 1398b5a359cSBastien Nocera */ 1408b5a359cSBastien Nocera static const struct dmi_system_id rotated_screen[] = { 1418b5a359cSBastien Nocera #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1428b5a359cSBastien Nocera { 143df5b5e55SHans de Goede .ident = "Teclast X89", 144df5b5e55SHans de Goede .matches = { 145df5b5e55SHans de Goede /* tPAD is too generic, also match on bios date */ 146df5b5e55SHans de Goede DMI_MATCH(DMI_BOARD_VENDOR, "TECLAST"), 147df5b5e55SHans de Goede DMI_MATCH(DMI_BOARD_NAME, "tPAD"), 148df5b5e55SHans de Goede DMI_MATCH(DMI_BIOS_DATE, "12/19/2014"), 149df5b5e55SHans de Goede }, 150df5b5e55SHans de Goede }, 151df5b5e55SHans de Goede { 1528b5a359cSBastien Nocera .ident = "WinBook TW100", 1538b5a359cSBastien Nocera .matches = { 1548b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 1558b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW100") 1568b5a359cSBastien Nocera } 1578b5a359cSBastien Nocera }, 1588b5a359cSBastien Nocera { 1598b5a359cSBastien Nocera .ident = "WinBook TW700", 1608b5a359cSBastien Nocera .matches = { 1618b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 1628b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW700") 1638b5a359cSBastien Nocera }, 1648b5a359cSBastien Nocera }, 1658b5a359cSBastien Nocera #endif 1668b5a359cSBastien Nocera {} 1678b5a359cSBastien Nocera }; 1688b5a359cSBastien Nocera 169bd3b8480SYauhen Kharuzhy static const struct dmi_system_id nine_bytes_report[] = { 170bd3b8480SYauhen Kharuzhy #if defined(CONFIG_DMI) && defined(CONFIG_X86) 171bd3b8480SYauhen Kharuzhy { 172bd3b8480SYauhen Kharuzhy .ident = "Lenovo YogaBook", 173bd3b8480SYauhen Kharuzhy /* YB1-X91L/F and YB1-X90L/F */ 174bd3b8480SYauhen Kharuzhy .matches = { 175bd3b8480SYauhen Kharuzhy DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X9") 176bd3b8480SYauhen Kharuzhy } 177bd3b8480SYauhen Kharuzhy }, 178bd3b8480SYauhen Kharuzhy #endif 179bd3b8480SYauhen Kharuzhy {} 180bd3b8480SYauhen Kharuzhy }; 181bd3b8480SYauhen Kharuzhy 1821dd5ddc1SSergei A. Trusov /* 1831dd5ddc1SSergei A. Trusov * Those tablets have their x coordinate inverted 1841dd5ddc1SSergei A. Trusov */ 1851dd5ddc1SSergei A. Trusov static const struct dmi_system_id inverted_x_screen[] = { 1861dd5ddc1SSergei A. Trusov #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1871dd5ddc1SSergei A. Trusov { 1881dd5ddc1SSergei A. Trusov .ident = "Cube I15-TC", 1891dd5ddc1SSergei A. Trusov .matches = { 1901dd5ddc1SSergei A. Trusov DMI_MATCH(DMI_SYS_VENDOR, "Cube"), 1911dd5ddc1SSergei A. Trusov DMI_MATCH(DMI_PRODUCT_NAME, "I15-TC") 1921dd5ddc1SSergei A. Trusov }, 1931dd5ddc1SSergei A. Trusov }, 1941dd5ddc1SSergei A. Trusov #endif 1951dd5ddc1SSergei A. Trusov {} 1961dd5ddc1SSergei A. Trusov }; 1971dd5ddc1SSergei A. Trusov 198ca96ea86SBastien Nocera /** 199ca96ea86SBastien Nocera * goodix_i2c_read - read data from a register of the i2c slave device. 200ca96ea86SBastien Nocera * 201ca96ea86SBastien Nocera * @client: i2c device. 202ca96ea86SBastien Nocera * @reg: the register to read from. 203ca96ea86SBastien Nocera * @buf: raw write data buffer. 204ca96ea86SBastien Nocera * @len: length of the buffer to write 205ca96ea86SBastien Nocera */ 206ca96ea86SBastien Nocera static int goodix_i2c_read(struct i2c_client *client, 207ca96ea86SBastien Nocera u16 reg, u8 *buf, int len) 208ca96ea86SBastien Nocera { 209ca96ea86SBastien Nocera struct i2c_msg msgs[2]; 210fafef982SMarcin Niestroj __be16 wbuf = cpu_to_be16(reg); 211ca96ea86SBastien Nocera int ret; 212ca96ea86SBastien Nocera 213ca96ea86SBastien Nocera msgs[0].flags = 0; 214ca96ea86SBastien Nocera msgs[0].addr = client->addr; 215ca96ea86SBastien Nocera msgs[0].len = 2; 216ca96ea86SBastien Nocera msgs[0].buf = (u8 *)&wbuf; 217ca96ea86SBastien Nocera 218ca96ea86SBastien Nocera msgs[1].flags = I2C_M_RD; 219ca96ea86SBastien Nocera msgs[1].addr = client->addr; 220ca96ea86SBastien Nocera msgs[1].len = len; 221ca96ea86SBastien Nocera msgs[1].buf = buf; 222ca96ea86SBastien Nocera 223ca96ea86SBastien Nocera ret = i2c_transfer(client->adapter, msgs, 2); 224ca96ea86SBastien Nocera return ret < 0 ? ret : (ret != ARRAY_SIZE(msgs) ? -EIO : 0); 225ca96ea86SBastien Nocera } 226ca96ea86SBastien Nocera 22768caf858SIrina Tirdea /** 22868caf858SIrina Tirdea * goodix_i2c_write - write data to a register of the i2c slave device. 22968caf858SIrina Tirdea * 23068caf858SIrina Tirdea * @client: i2c device. 23168caf858SIrina Tirdea * @reg: the register to write to. 23268caf858SIrina Tirdea * @buf: raw data buffer to write. 23368caf858SIrina Tirdea * @len: length of the buffer to write 23468caf858SIrina Tirdea */ 23568caf858SIrina Tirdea static int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf, 23668caf858SIrina Tirdea unsigned len) 23768caf858SIrina Tirdea { 23868caf858SIrina Tirdea u8 *addr_buf; 23968caf858SIrina Tirdea struct i2c_msg msg; 24068caf858SIrina Tirdea int ret; 24168caf858SIrina Tirdea 24268caf858SIrina Tirdea addr_buf = kmalloc(len + 2, GFP_KERNEL); 24368caf858SIrina Tirdea if (!addr_buf) 24468caf858SIrina Tirdea return -ENOMEM; 24568caf858SIrina Tirdea 24668caf858SIrina Tirdea addr_buf[0] = reg >> 8; 24768caf858SIrina Tirdea addr_buf[1] = reg & 0xFF; 24868caf858SIrina Tirdea memcpy(&addr_buf[2], buf, len); 24968caf858SIrina Tirdea 25068caf858SIrina Tirdea msg.flags = 0; 25168caf858SIrina Tirdea msg.addr = client->addr; 25268caf858SIrina Tirdea msg.buf = addr_buf; 25368caf858SIrina Tirdea msg.len = len + 2; 25468caf858SIrina Tirdea 25568caf858SIrina Tirdea ret = i2c_transfer(client->adapter, &msg, 1); 25668caf858SIrina Tirdea kfree(addr_buf); 25768caf858SIrina Tirdea return ret < 0 ? ret : (ret != 1 ? -EIO : 0); 25868caf858SIrina Tirdea } 25968caf858SIrina Tirdea 2605ab09d6aSIrina Tirdea static int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value) 2615ab09d6aSIrina Tirdea { 2625ab09d6aSIrina Tirdea return goodix_i2c_write(client, reg, &value, sizeof(value)); 2635ab09d6aSIrina Tirdea } 2645ab09d6aSIrina Tirdea 26525309004SMarcin Niestroj static const struct goodix_chip_data *goodix_get_chip_data(u16 id) 266a779fbc6SIrina Tirdea { 267a779fbc6SIrina Tirdea switch (id) { 26825309004SMarcin Niestroj case 1151: 269a5f50c50SJagan Teki case 5663: 27084ef1b33SGuido Günther case 5688: 27125309004SMarcin Niestroj return >1x_chip_data; 27225309004SMarcin Niestroj 273a779fbc6SIrina Tirdea case 911: 274a779fbc6SIrina Tirdea case 9271: 275a779fbc6SIrina Tirdea case 9110: 276a779fbc6SIrina Tirdea case 927: 277a779fbc6SIrina Tirdea case 928: 27825309004SMarcin Niestroj return >911_chip_data; 279a779fbc6SIrina Tirdea 280a779fbc6SIrina Tirdea case 912: 281a779fbc6SIrina Tirdea case 967: 28225309004SMarcin Niestroj return >967_chip_data; 283a779fbc6SIrina Tirdea 284a779fbc6SIrina Tirdea default: 28525309004SMarcin Niestroj return >9x_chip_data; 286a779fbc6SIrina Tirdea } 287a779fbc6SIrina Tirdea } 288a779fbc6SIrina Tirdea 289ca96ea86SBastien Nocera static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data) 290ca96ea86SBastien Nocera { 2919b5db7aaSPaul Cercueil unsigned long max_timeout; 292ca96ea86SBastien Nocera int touch_num; 293ca96ea86SBastien Nocera int error; 294ca96ea86SBastien Nocera 2959b5db7aaSPaul Cercueil /* 2969b5db7aaSPaul Cercueil * The 'buffer status' bit, which indicates that the data is valid, is 2979b5db7aaSPaul Cercueil * not set as soon as the interrupt is raised, but slightly after. 2989b5db7aaSPaul Cercueil * This takes around 10 ms to happen, so we poll for 20 ms. 2999b5db7aaSPaul Cercueil */ 3009b5db7aaSPaul Cercueil max_timeout = jiffies + msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT); 3019b5db7aaSPaul Cercueil do { 3029b5db7aaSPaul Cercueil error = goodix_i2c_read(ts->client, GOODIX_READ_COOR_ADDR, 303bd3b8480SYauhen Kharuzhy data, ts->contact_size + 1); 304ca96ea86SBastien Nocera if (error) { 3059b5db7aaSPaul Cercueil dev_err(&ts->client->dev, "I2C transfer error: %d\n", 3069b5db7aaSPaul Cercueil error); 307ca96ea86SBastien Nocera return error; 308ca96ea86SBastien Nocera } 309ca96ea86SBastien Nocera 3109b5db7aaSPaul Cercueil if (data[0] & GOODIX_BUFFER_STATUS_READY) { 311ca96ea86SBastien Nocera touch_num = data[0] & 0x0f; 312a7ac7c95SAleksei Mamlin if (touch_num > ts->max_touch_num) 313ca96ea86SBastien Nocera return -EPROTO; 314ca96ea86SBastien Nocera 315ca96ea86SBastien Nocera if (touch_num > 1) { 316bd3b8480SYauhen Kharuzhy data += 1 + ts->contact_size; 317ca96ea86SBastien Nocera error = goodix_i2c_read(ts->client, 318ca96ea86SBastien Nocera GOODIX_READ_COOR_ADDR + 319bd3b8480SYauhen Kharuzhy 1 + ts->contact_size, 320ca96ea86SBastien Nocera data, 321bd3b8480SYauhen Kharuzhy ts->contact_size * 3229b5db7aaSPaul Cercueil (touch_num - 1)); 323ca96ea86SBastien Nocera if (error) 324ca96ea86SBastien Nocera return error; 325ca96ea86SBastien Nocera } 326ca96ea86SBastien Nocera 327ca96ea86SBastien Nocera return touch_num; 328ca96ea86SBastien Nocera } 329ca96ea86SBastien Nocera 3309b5db7aaSPaul Cercueil usleep_range(1000, 2000); /* Poll every 1 - 2 ms */ 3319b5db7aaSPaul Cercueil } while (time_before(jiffies, max_timeout)); 3329b5db7aaSPaul Cercueil 3339b5db7aaSPaul Cercueil /* 3349b5db7aaSPaul Cercueil * The Goodix panel will send spurious interrupts after a 3359b5db7aaSPaul Cercueil * 'finger up' event, which will always cause a timeout. 3369b5db7aaSPaul Cercueil */ 3379b5db7aaSPaul Cercueil return 0; 3389b5db7aaSPaul Cercueil } 3399b5db7aaSPaul Cercueil 340bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_8b(struct goodix_ts_data *ts, u8 *coor_data) 341ca96ea86SBastien Nocera { 342ca96ea86SBastien Nocera int id = coor_data[0] & 0x0F; 343ca96ea86SBastien Nocera int input_x = get_unaligned_le16(&coor_data[1]); 344ca96ea86SBastien Nocera int input_y = get_unaligned_le16(&coor_data[3]); 345ca96ea86SBastien Nocera int input_w = get_unaligned_le16(&coor_data[5]); 346ca96ea86SBastien Nocera 347ca96ea86SBastien Nocera input_mt_slot(ts->input_dev, id); 348ca96ea86SBastien Nocera input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 349fafef982SMarcin Niestroj touchscreen_report_pos(ts->input_dev, &ts->prop, 350fafef982SMarcin Niestroj input_x, input_y, true); 351ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 352ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 353ca96ea86SBastien Nocera } 354ca96ea86SBastien Nocera 355bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_9b(struct goodix_ts_data *ts, u8 *coor_data) 356bd3b8480SYauhen Kharuzhy { 357bd3b8480SYauhen Kharuzhy int id = coor_data[1] & 0x0F; 358bd3b8480SYauhen Kharuzhy int input_x = get_unaligned_le16(&coor_data[3]); 359bd3b8480SYauhen Kharuzhy int input_y = get_unaligned_le16(&coor_data[5]); 360bd3b8480SYauhen Kharuzhy int input_w = get_unaligned_le16(&coor_data[7]); 361bd3b8480SYauhen Kharuzhy 362bd3b8480SYauhen Kharuzhy input_mt_slot(ts->input_dev, id); 363bd3b8480SYauhen Kharuzhy input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 364bd3b8480SYauhen Kharuzhy touchscreen_report_pos(ts->input_dev, &ts->prop, 365bd3b8480SYauhen Kharuzhy input_x, input_y, true); 366bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 367bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 368bd3b8480SYauhen Kharuzhy } 369bd3b8480SYauhen Kharuzhy 370ca96ea86SBastien Nocera /** 371ca96ea86SBastien Nocera * goodix_process_events - Process incoming events 372ca96ea86SBastien Nocera * 373ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 374ca96ea86SBastien Nocera * 375ca96ea86SBastien Nocera * Called when the IRQ is triggered. Read the current device state, and push 376ca96ea86SBastien Nocera * the input events to the user space. 377ca96ea86SBastien Nocera */ 378ca96ea86SBastien Nocera static void goodix_process_events(struct goodix_ts_data *ts) 379ca96ea86SBastien Nocera { 380bd3b8480SYauhen Kharuzhy u8 point_data[1 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS]; 381ca96ea86SBastien Nocera int touch_num; 382ca96ea86SBastien Nocera int i; 383ca96ea86SBastien Nocera 384ca96ea86SBastien Nocera touch_num = goodix_ts_read_input_report(ts, point_data); 385ca96ea86SBastien Nocera if (touch_num < 0) 386ca96ea86SBastien Nocera return; 387ca96ea86SBastien Nocera 3884a54feeaSSergei A. Trusov /* 3894a54feeaSSergei A. Trusov * Bit 4 of the first byte reports the status of the capacitive 3904a54feeaSSergei A. Trusov * Windows/Home button. 3914a54feeaSSergei A. Trusov */ 3924a54feeaSSergei A. Trusov input_report_key(ts->input_dev, KEY_LEFTMETA, point_data[0] & BIT(4)); 3934a54feeaSSergei A. Trusov 394ca96ea86SBastien Nocera for (i = 0; i < touch_num; i++) 395bd3b8480SYauhen Kharuzhy if (ts->contact_size == 9) 396bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_9b(ts, 397bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 398bd3b8480SYauhen Kharuzhy else 399bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_8b(ts, 400bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 401ca96ea86SBastien Nocera 402ca96ea86SBastien Nocera input_mt_sync_frame(ts->input_dev); 403ca96ea86SBastien Nocera input_sync(ts->input_dev); 404ca96ea86SBastien Nocera } 405ca96ea86SBastien Nocera 406ca96ea86SBastien Nocera /** 407ca96ea86SBastien Nocera * goodix_ts_irq_handler - The IRQ handler 408ca96ea86SBastien Nocera * 409ca96ea86SBastien Nocera * @irq: interrupt number. 410ca96ea86SBastien Nocera * @dev_id: private data pointer. 411ca96ea86SBastien Nocera */ 412ca96ea86SBastien Nocera static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id) 413ca96ea86SBastien Nocera { 414ca96ea86SBastien Nocera struct goodix_ts_data *ts = dev_id; 415ca96ea86SBastien Nocera 416ca96ea86SBastien Nocera goodix_process_events(ts); 417ca96ea86SBastien Nocera 4185d655b35SIrina Tirdea if (goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0) < 0) 419ca96ea86SBastien Nocera dev_err(&ts->client->dev, "I2C write end_cmd error\n"); 420ca96ea86SBastien Nocera 421ca96ea86SBastien Nocera return IRQ_HANDLED; 422ca96ea86SBastien Nocera } 423ca96ea86SBastien Nocera 4245ab09d6aSIrina Tirdea static void goodix_free_irq(struct goodix_ts_data *ts) 4255ab09d6aSIrina Tirdea { 4265ab09d6aSIrina Tirdea devm_free_irq(&ts->client->dev, ts->client->irq, ts); 4275ab09d6aSIrina Tirdea } 4285ab09d6aSIrina Tirdea 4295ab09d6aSIrina Tirdea static int goodix_request_irq(struct goodix_ts_data *ts) 4305ab09d6aSIrina Tirdea { 4315ab09d6aSIrina Tirdea return devm_request_threaded_irq(&ts->client->dev, ts->client->irq, 4325ab09d6aSIrina Tirdea NULL, goodix_ts_irq_handler, 4335ab09d6aSIrina Tirdea ts->irq_flags, ts->client->name, ts); 4345ab09d6aSIrina Tirdea } 4355ab09d6aSIrina Tirdea 43625309004SMarcin Niestroj static int goodix_check_cfg_8(struct goodix_ts_data *ts, 43768caf858SIrina Tirdea const struct firmware *cfg) 43868caf858SIrina Tirdea { 43925309004SMarcin Niestroj int i, raw_cfg_len = cfg->size - 2; 44068caf858SIrina Tirdea u8 check_sum = 0; 44168caf858SIrina Tirdea 44268caf858SIrina Tirdea for (i = 0; i < raw_cfg_len; i++) 44368caf858SIrina Tirdea check_sum += cfg->data[i]; 44468caf858SIrina Tirdea check_sum = (~check_sum) + 1; 44568caf858SIrina Tirdea if (check_sum != cfg->data[raw_cfg_len]) { 44668caf858SIrina Tirdea dev_err(&ts->client->dev, 44768caf858SIrina Tirdea "The checksum of the config fw is not correct"); 44868caf858SIrina Tirdea return -EINVAL; 44968caf858SIrina Tirdea } 45068caf858SIrina Tirdea 45168caf858SIrina Tirdea if (cfg->data[raw_cfg_len + 1] != 1) { 45268caf858SIrina Tirdea dev_err(&ts->client->dev, 45368caf858SIrina Tirdea "Config fw must have Config_Fresh register set"); 45468caf858SIrina Tirdea return -EINVAL; 45568caf858SIrina Tirdea } 45668caf858SIrina Tirdea 45768caf858SIrina Tirdea return 0; 45868caf858SIrina Tirdea } 45968caf858SIrina Tirdea 46025309004SMarcin Niestroj static int goodix_check_cfg_16(struct goodix_ts_data *ts, 46125309004SMarcin Niestroj const struct firmware *cfg) 46225309004SMarcin Niestroj { 46325309004SMarcin Niestroj int i, raw_cfg_len = cfg->size - 3; 46425309004SMarcin Niestroj u16 check_sum = 0; 46525309004SMarcin Niestroj 46625309004SMarcin Niestroj for (i = 0; i < raw_cfg_len; i += 2) 46725309004SMarcin Niestroj check_sum += get_unaligned_be16(&cfg->data[i]); 46825309004SMarcin Niestroj check_sum = (~check_sum) + 1; 46925309004SMarcin Niestroj if (check_sum != get_unaligned_be16(&cfg->data[raw_cfg_len])) { 47025309004SMarcin Niestroj dev_err(&ts->client->dev, 47125309004SMarcin Niestroj "The checksum of the config fw is not correct"); 47225309004SMarcin Niestroj return -EINVAL; 47325309004SMarcin Niestroj } 47425309004SMarcin Niestroj 47525309004SMarcin Niestroj if (cfg->data[raw_cfg_len + 2] != 1) { 47625309004SMarcin Niestroj dev_err(&ts->client->dev, 47725309004SMarcin Niestroj "Config fw must have Config_Fresh register set"); 47825309004SMarcin Niestroj return -EINVAL; 47925309004SMarcin Niestroj } 48025309004SMarcin Niestroj 48125309004SMarcin Niestroj return 0; 48225309004SMarcin Niestroj } 48325309004SMarcin Niestroj 48425309004SMarcin Niestroj /** 48525309004SMarcin Niestroj * goodix_check_cfg - Checks if config fw is valid 48625309004SMarcin Niestroj * 48725309004SMarcin Niestroj * @ts: goodix_ts_data pointer 48825309004SMarcin Niestroj * @cfg: firmware config data 48925309004SMarcin Niestroj */ 49025309004SMarcin Niestroj static int goodix_check_cfg(struct goodix_ts_data *ts, 49125309004SMarcin Niestroj const struct firmware *cfg) 49225309004SMarcin Niestroj { 49325309004SMarcin Niestroj if (cfg->size > GOODIX_CONFIG_MAX_LENGTH) { 49425309004SMarcin Niestroj dev_err(&ts->client->dev, 49525309004SMarcin Niestroj "The length of the config fw is not correct"); 49625309004SMarcin Niestroj return -EINVAL; 49725309004SMarcin Niestroj } 49825309004SMarcin Niestroj 49925309004SMarcin Niestroj return ts->chip->check_config(ts, cfg); 50025309004SMarcin Niestroj } 50125309004SMarcin Niestroj 50268caf858SIrina Tirdea /** 50368caf858SIrina Tirdea * goodix_send_cfg - Write fw config to device 50468caf858SIrina Tirdea * 50568caf858SIrina Tirdea * @ts: goodix_ts_data pointer 50668caf858SIrina Tirdea * @cfg: config firmware to write to device 50768caf858SIrina Tirdea */ 50868caf858SIrina Tirdea static int goodix_send_cfg(struct goodix_ts_data *ts, 50968caf858SIrina Tirdea const struct firmware *cfg) 51068caf858SIrina Tirdea { 51168caf858SIrina Tirdea int error; 51268caf858SIrina Tirdea 51368caf858SIrina Tirdea error = goodix_check_cfg(ts, cfg); 51468caf858SIrina Tirdea if (error) 51568caf858SIrina Tirdea return error; 51668caf858SIrina Tirdea 51725309004SMarcin Niestroj error = goodix_i2c_write(ts->client, ts->chip->config_addr, cfg->data, 51868caf858SIrina Tirdea cfg->size); 51968caf858SIrina Tirdea if (error) { 52068caf858SIrina Tirdea dev_err(&ts->client->dev, "Failed to write config data: %d", 52168caf858SIrina Tirdea error); 52268caf858SIrina Tirdea return error; 52368caf858SIrina Tirdea } 52468caf858SIrina Tirdea dev_dbg(&ts->client->dev, "Config sent successfully."); 52568caf858SIrina Tirdea 52668caf858SIrina Tirdea /* Let the firmware reconfigure itself, so sleep for 10ms */ 52768caf858SIrina Tirdea usleep_range(10000, 11000); 52868caf858SIrina Tirdea 52968caf858SIrina Tirdea return 0; 53068caf858SIrina Tirdea } 53168caf858SIrina Tirdea 53249db3997SHans de Goede static int goodix_irq_direction_output(struct goodix_ts_data *ts, 53349db3997SHans de Goede int value) 53449db3997SHans de Goede { 53549db3997SHans de Goede switch (ts->irq_pin_access_method) { 53649db3997SHans de Goede case IRQ_PIN_ACCESS_NONE: 53749db3997SHans de Goede dev_err(&ts->client->dev, 53849db3997SHans de Goede "%s called without an irq_pin_access_method set\n", 53949db3997SHans de Goede __func__); 54049db3997SHans de Goede return -EINVAL; 54149db3997SHans de Goede case IRQ_PIN_ACCESS_GPIO: 54249db3997SHans de Goede return gpiod_direction_output(ts->gpiod_int, value); 543a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 544a7d4b171SHans de Goede /* 545a7d4b171SHans de Goede * The IRQ pin triggers on a falling edge, so its gets marked 546a7d4b171SHans de Goede * as active-low, use output_raw to avoid the value inversion. 547a7d4b171SHans de Goede */ 548a7d4b171SHans de Goede return gpiod_direction_output_raw(ts->gpiod_int, value); 54949db3997SHans de Goede } 55049db3997SHans de Goede 55149db3997SHans de Goede return -EINVAL; /* Never reached */ 55249db3997SHans de Goede } 55349db3997SHans de Goede 55449db3997SHans de Goede static int goodix_irq_direction_input(struct goodix_ts_data *ts) 55549db3997SHans de Goede { 55649db3997SHans de Goede switch (ts->irq_pin_access_method) { 55749db3997SHans de Goede case IRQ_PIN_ACCESS_NONE: 55849db3997SHans de Goede dev_err(&ts->client->dev, 55949db3997SHans de Goede "%s called without an irq_pin_access_method set\n", 56049db3997SHans de Goede __func__); 56149db3997SHans de Goede return -EINVAL; 56249db3997SHans de Goede case IRQ_PIN_ACCESS_GPIO: 563a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 56449db3997SHans de Goede return gpiod_direction_input(ts->gpiod_int); 56549db3997SHans de Goede } 56649db3997SHans de Goede 56749db3997SHans de Goede return -EINVAL; /* Never reached */ 56849db3997SHans de Goede } 56949db3997SHans de Goede 570ec6e1b40SIrina Tirdea static int goodix_int_sync(struct goodix_ts_data *ts) 571ec6e1b40SIrina Tirdea { 572ec6e1b40SIrina Tirdea int error; 573ec6e1b40SIrina Tirdea 57449db3997SHans de Goede error = goodix_irq_direction_output(ts, 0); 575ec6e1b40SIrina Tirdea if (error) 576ec6e1b40SIrina Tirdea return error; 577ec6e1b40SIrina Tirdea 578ec6e1b40SIrina Tirdea msleep(50); /* T5: 50ms */ 579ec6e1b40SIrina Tirdea 58049db3997SHans de Goede error = goodix_irq_direction_input(ts); 581ec6e1b40SIrina Tirdea if (error) 582ec6e1b40SIrina Tirdea return error; 583ec6e1b40SIrina Tirdea 584ec6e1b40SIrina Tirdea return 0; 585ec6e1b40SIrina Tirdea } 586ec6e1b40SIrina Tirdea 587ec6e1b40SIrina Tirdea /** 588ec6e1b40SIrina Tirdea * goodix_reset - Reset device during power on 589ec6e1b40SIrina Tirdea * 590ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 591ec6e1b40SIrina Tirdea */ 592ec6e1b40SIrina Tirdea static int goodix_reset(struct goodix_ts_data *ts) 593ec6e1b40SIrina Tirdea { 594ec6e1b40SIrina Tirdea int error; 595ec6e1b40SIrina Tirdea 596ec6e1b40SIrina Tirdea /* begin select I2C slave addr */ 597ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 0); 598ec6e1b40SIrina Tirdea if (error) 599ec6e1b40SIrina Tirdea return error; 600ec6e1b40SIrina Tirdea 601ec6e1b40SIrina Tirdea msleep(20); /* T2: > 10ms */ 602ec6e1b40SIrina Tirdea 603ec6e1b40SIrina Tirdea /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */ 60449db3997SHans de Goede error = goodix_irq_direction_output(ts, ts->client->addr == 0x14); 605ec6e1b40SIrina Tirdea if (error) 606ec6e1b40SIrina Tirdea return error; 607ec6e1b40SIrina Tirdea 608ec6e1b40SIrina Tirdea usleep_range(100, 2000); /* T3: > 100us */ 609ec6e1b40SIrina Tirdea 610ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 1); 611ec6e1b40SIrina Tirdea if (error) 612ec6e1b40SIrina Tirdea return error; 613ec6e1b40SIrina Tirdea 614ec6e1b40SIrina Tirdea usleep_range(6000, 10000); /* T4: > 5ms */ 615ec6e1b40SIrina Tirdea 616ec6e1b40SIrina Tirdea /* end select I2C slave addr */ 617ec6e1b40SIrina Tirdea error = gpiod_direction_input(ts->gpiod_rst); 618ec6e1b40SIrina Tirdea if (error) 619ec6e1b40SIrina Tirdea return error; 620ec6e1b40SIrina Tirdea 621ec6e1b40SIrina Tirdea error = goodix_int_sync(ts); 622ec6e1b40SIrina Tirdea if (error) 623ec6e1b40SIrina Tirdea return error; 624ec6e1b40SIrina Tirdea 625ec6e1b40SIrina Tirdea return 0; 626ec6e1b40SIrina Tirdea } 627ec6e1b40SIrina Tirdea 628a7d4b171SHans de Goede #if defined CONFIG_X86 && defined CONFIG_ACPI 629a7d4b171SHans de Goede static const struct acpi_gpio_params first_gpio = { 0, 0, false }; 630a7d4b171SHans de Goede static const struct acpi_gpio_params second_gpio = { 1, 0, false }; 631a7d4b171SHans de Goede 632a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_first_gpios[] = { 633a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &first_gpio, 1 }, 634a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &second_gpio, 1 }, 635a7d4b171SHans de Goede { }, 636a7d4b171SHans de Goede }; 637a7d4b171SHans de Goede 638a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_last_gpios[] = { 639a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 640a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &second_gpio, 1 }, 641a7d4b171SHans de Goede { }, 642a7d4b171SHans de Goede }; 643a7d4b171SHans de Goede 644a7d4b171SHans de Goede static int goodix_resource(struct acpi_resource *ares, void *data) 645a7d4b171SHans de Goede { 646a7d4b171SHans de Goede struct goodix_ts_data *ts = data; 647a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 648a7d4b171SHans de Goede struct acpi_resource_gpio *gpio; 649a7d4b171SHans de Goede 650a7d4b171SHans de Goede switch (ares->type) { 651a7d4b171SHans de Goede case ACPI_RESOURCE_TYPE_GPIO: 652a7d4b171SHans de Goede gpio = &ares->data.gpio; 653a7d4b171SHans de Goede if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { 654a7d4b171SHans de Goede if (ts->gpio_int_idx == -1) { 655a7d4b171SHans de Goede ts->gpio_int_idx = ts->gpio_count; 656a7d4b171SHans de Goede } else { 657a7d4b171SHans de Goede dev_err(dev, "More then one GpioInt resource, ignoring ACPI GPIO resources\n"); 658a7d4b171SHans de Goede ts->gpio_int_idx = -2; 659a7d4b171SHans de Goede } 660a7d4b171SHans de Goede } 661a7d4b171SHans de Goede ts->gpio_count++; 662a7d4b171SHans de Goede break; 663a7d4b171SHans de Goede default: 664a7d4b171SHans de Goede break; 665a7d4b171SHans de Goede } 666a7d4b171SHans de Goede 667a7d4b171SHans de Goede return 0; 668a7d4b171SHans de Goede } 669a7d4b171SHans de Goede 670a7d4b171SHans de Goede /* 671a7d4b171SHans de Goede * This function gets called in case we fail to get the irq GPIO directly 672a7d4b171SHans de Goede * because the ACPI tables lack GPIO-name to APCI _CRS index mappings 673a7d4b171SHans de Goede * (no _DSD UUID daffd814-6eba-4d8c-8a91-bc9bbf4aa301 data). 674a7d4b171SHans de Goede * In that case we add our own mapping and then goodix_get_gpio_config() 675a7d4b171SHans de Goede * retries to get the GPIOs based on the added mapping. 676a7d4b171SHans de Goede */ 677a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 678a7d4b171SHans de Goede { 679a7d4b171SHans de Goede const struct acpi_gpio_mapping *gpio_mapping = NULL; 680a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 681a7d4b171SHans de Goede LIST_HEAD(resources); 682a7d4b171SHans de Goede int ret; 683a7d4b171SHans de Goede 684a7d4b171SHans de Goede ts->gpio_count = 0; 685a7d4b171SHans de Goede ts->gpio_int_idx = -1; 686a7d4b171SHans de Goede ret = acpi_dev_get_resources(ACPI_COMPANION(dev), &resources, 687a7d4b171SHans de Goede goodix_resource, ts); 688a7d4b171SHans de Goede if (ret < 0) { 689a7d4b171SHans de Goede dev_err(dev, "Error getting ACPI resources: %d\n", ret); 690a7d4b171SHans de Goede return ret; 691a7d4b171SHans de Goede } 692a7d4b171SHans de Goede 693a7d4b171SHans de Goede acpi_dev_free_resource_list(&resources); 694a7d4b171SHans de Goede 695a7d4b171SHans de Goede if (ts->gpio_count == 2 && ts->gpio_int_idx == 0) { 696a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 697a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_first_gpios; 698a7d4b171SHans de Goede } else if (ts->gpio_count == 2 && ts->gpio_int_idx == 1) { 699a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 700a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_last_gpios; 701a7d4b171SHans de Goede } else { 702a7d4b171SHans de Goede dev_warn(dev, "Unexpected ACPI resources: gpio_count %d, gpio_int_idx %d\n", 703a7d4b171SHans de Goede ts->gpio_count, ts->gpio_int_idx); 704a7d4b171SHans de Goede return -EINVAL; 705a7d4b171SHans de Goede } 706a7d4b171SHans de Goede 707a7d4b171SHans de Goede return devm_acpi_dev_add_driver_gpios(dev, gpio_mapping); 708a7d4b171SHans de Goede } 709a7d4b171SHans de Goede #else 710a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 711a7d4b171SHans de Goede { 712a7d4b171SHans de Goede return -EINVAL; 713a7d4b171SHans de Goede } 714a7d4b171SHans de Goede #endif /* CONFIG_X86 && CONFIG_ACPI */ 715a7d4b171SHans de Goede 716ec6e1b40SIrina Tirdea /** 717ec6e1b40SIrina Tirdea * goodix_get_gpio_config - Get GPIO config from ACPI/DT 718ec6e1b40SIrina Tirdea * 719ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 720ec6e1b40SIrina Tirdea */ 721ec6e1b40SIrina Tirdea static int goodix_get_gpio_config(struct goodix_ts_data *ts) 722ec6e1b40SIrina Tirdea { 723ec6e1b40SIrina Tirdea int error; 724ec6e1b40SIrina Tirdea struct device *dev; 725ec6e1b40SIrina Tirdea struct gpio_desc *gpiod; 726a7d4b171SHans de Goede bool added_acpi_mappings = false; 727ec6e1b40SIrina Tirdea 728ec6e1b40SIrina Tirdea if (!ts->client) 729ec6e1b40SIrina Tirdea return -EINVAL; 730ec6e1b40SIrina Tirdea dev = &ts->client->dev; 731ec6e1b40SIrina Tirdea 732ae97fb58SJagan Teki ts->avdd28 = devm_regulator_get(dev, "AVDD28"); 733ae97fb58SJagan Teki if (IS_ERR(ts->avdd28)) { 734ae97fb58SJagan Teki error = PTR_ERR(ts->avdd28); 735ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 736ae97fb58SJagan Teki dev_err(dev, 737ae97fb58SJagan Teki "Failed to get AVDD28 regulator: %d\n", error); 738ae97fb58SJagan Teki return error; 739ae97fb58SJagan Teki } 740ae97fb58SJagan Teki 741ae97fb58SJagan Teki ts->vddio = devm_regulator_get(dev, "VDDIO"); 742ae97fb58SJagan Teki if (IS_ERR(ts->vddio)) { 743ae97fb58SJagan Teki error = PTR_ERR(ts->vddio); 744ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 745ae97fb58SJagan Teki dev_err(dev, 746ae97fb58SJagan Teki "Failed to get VDDIO regulator: %d\n", error); 747ae97fb58SJagan Teki return error; 748ae97fb58SJagan Teki } 749ae97fb58SJagan Teki 750a7d4b171SHans de Goede retry_get_irq_gpio: 751ec6e1b40SIrina Tirdea /* Get the interrupt GPIO pin number */ 752ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN); 753ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 754ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 755ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 756ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 757ec6e1b40SIrina Tirdea GOODIX_GPIO_INT_NAME, error); 758ec6e1b40SIrina Tirdea return error; 759ec6e1b40SIrina Tirdea } 760a7d4b171SHans de Goede if (!gpiod && has_acpi_companion(dev) && !added_acpi_mappings) { 761a7d4b171SHans de Goede added_acpi_mappings = true; 762a7d4b171SHans de Goede if (goodix_add_acpi_gpio_mappings(ts) == 0) 763a7d4b171SHans de Goede goto retry_get_irq_gpio; 764a7d4b171SHans de Goede } 765ec6e1b40SIrina Tirdea 766ec6e1b40SIrina Tirdea ts->gpiod_int = gpiod; 767ec6e1b40SIrina Tirdea 768ec6e1b40SIrina Tirdea /* Get the reset line GPIO pin number */ 769ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, GPIOD_IN); 770ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 771ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 772ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 773ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 774ec6e1b40SIrina Tirdea GOODIX_GPIO_RST_NAME, error); 775ec6e1b40SIrina Tirdea return error; 776ec6e1b40SIrina Tirdea } 777ec6e1b40SIrina Tirdea 778ec6e1b40SIrina Tirdea ts->gpiod_rst = gpiod; 779ec6e1b40SIrina Tirdea 780a7d4b171SHans de Goede switch (ts->irq_pin_access_method) { 781a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 782a7d4b171SHans de Goede /* 783a7d4b171SHans de Goede * We end up here if goodix_add_acpi_gpio_mappings() has 784a7d4b171SHans de Goede * called devm_acpi_dev_add_driver_gpios() because the ACPI 785a7d4b171SHans de Goede * tables did not contain name to index mappings. 786a7d4b171SHans de Goede * Check that we successfully got both GPIOs after we've 787a7d4b171SHans de Goede * added our own acpi_gpio_mapping and if we did not get both 788a7d4b171SHans de Goede * GPIOs reset irq_pin_access_method to IRQ_PIN_ACCESS_NONE. 789a7d4b171SHans de Goede */ 790a7d4b171SHans de Goede if (!ts->gpiod_int || !ts->gpiod_rst) 791a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 792a7d4b171SHans de Goede break; 793a7d4b171SHans de Goede default: 794e070a97bSHans de Goede if (ts->gpiod_int && ts->gpiod_rst) { 7951921daceSHans de Goede ts->reset_controller_at_probe = true; 796e070a97bSHans de Goede ts->load_cfg_from_disk = true; 79749db3997SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_GPIO; 798e070a97bSHans de Goede } 799a7d4b171SHans de Goede } 80049db3997SHans de Goede 801ec6e1b40SIrina Tirdea return 0; 802ec6e1b40SIrina Tirdea } 803ec6e1b40SIrina Tirdea 804ca96ea86SBastien Nocera /** 805ca96ea86SBastien Nocera * goodix_read_config - Read the embedded configuration of the panel 806ca96ea86SBastien Nocera * 807ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 808ca96ea86SBastien Nocera * 809ca96ea86SBastien Nocera * Must be called during probe 810ca96ea86SBastien Nocera */ 811ca96ea86SBastien Nocera static void goodix_read_config(struct goodix_ts_data *ts) 812ca96ea86SBastien Nocera { 813ca96ea86SBastien Nocera u8 config[GOODIX_CONFIG_MAX_LENGTH]; 814fafef982SMarcin Niestroj int x_max, y_max; 815ca96ea86SBastien Nocera int error; 816ca96ea86SBastien Nocera 81725309004SMarcin Niestroj error = goodix_i2c_read(ts->client, ts->chip->config_addr, 81825309004SMarcin Niestroj config, ts->chip->config_len); 819ca96ea86SBastien Nocera if (error) { 820fafef982SMarcin Niestroj dev_warn(&ts->client->dev, "Error reading config: %d\n", 821ca96ea86SBastien Nocera error); 822ca96ea86SBastien Nocera ts->int_trigger_type = GOODIX_INT_TRIGGER; 823a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 824ca96ea86SBastien Nocera return; 825ca96ea86SBastien Nocera } 826ca96ea86SBastien Nocera 827a7ac7c95SAleksei Mamlin ts->int_trigger_type = config[TRIGGER_LOC] & 0x03; 828a7ac7c95SAleksei Mamlin ts->max_touch_num = config[MAX_CONTACTS_LOC] & 0x0f; 8298b5a359cSBastien Nocera 830fafef982SMarcin Niestroj x_max = get_unaligned_le16(&config[RESOLUTION_LOC]); 831fafef982SMarcin Niestroj y_max = get_unaligned_le16(&config[RESOLUTION_LOC + 2]); 832fafef982SMarcin Niestroj if (x_max && y_max) { 833fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_X, x_max - 1); 834fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_Y, y_max - 1); 835ca96ea86SBastien Nocera } 83657c80e8eSKarsten Merker } 837ca96ea86SBastien Nocera 838ca96ea86SBastien Nocera /** 839ca96ea86SBastien Nocera * goodix_read_version - Read goodix touchscreen version 840ca96ea86SBastien Nocera * 84168caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 842ca96ea86SBastien Nocera */ 84368caf858SIrina Tirdea static int goodix_read_version(struct goodix_ts_data *ts) 844ca96ea86SBastien Nocera { 845ca96ea86SBastien Nocera int error; 846ca96ea86SBastien Nocera u8 buf[6]; 847e70b0307SIrina Tirdea char id_str[5]; 848ca96ea86SBastien Nocera 84968caf858SIrina Tirdea error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf)); 850ca96ea86SBastien Nocera if (error) { 85168caf858SIrina Tirdea dev_err(&ts->client->dev, "read version failed: %d\n", error); 852ca96ea86SBastien Nocera return error; 853ca96ea86SBastien Nocera } 854ca96ea86SBastien Nocera 855e70b0307SIrina Tirdea memcpy(id_str, buf, 4); 856e70b0307SIrina Tirdea id_str[4] = 0; 85768caf858SIrina Tirdea if (kstrtou16(id_str, 10, &ts->id)) 85868caf858SIrina Tirdea ts->id = 0x1001; 859e70b0307SIrina Tirdea 86068caf858SIrina Tirdea ts->version = get_unaligned_le16(&buf[4]); 861ca96ea86SBastien Nocera 86268caf858SIrina Tirdea dev_info(&ts->client->dev, "ID %d, version: %04x\n", ts->id, 86368caf858SIrina Tirdea ts->version); 864ca96ea86SBastien Nocera 865ca96ea86SBastien Nocera return 0; 866ca96ea86SBastien Nocera } 867ca96ea86SBastien Nocera 868ca96ea86SBastien Nocera /** 869ca96ea86SBastien Nocera * goodix_i2c_test - I2C test function to check if the device answers. 870ca96ea86SBastien Nocera * 871ca96ea86SBastien Nocera * @client: the i2c client 872ca96ea86SBastien Nocera */ 873ca96ea86SBastien Nocera static int goodix_i2c_test(struct i2c_client *client) 874ca96ea86SBastien Nocera { 875ca96ea86SBastien Nocera int retry = 0; 876ca96ea86SBastien Nocera int error; 877ca96ea86SBastien Nocera u8 test; 878ca96ea86SBastien Nocera 879ca96ea86SBastien Nocera while (retry++ < 2) { 88025309004SMarcin Niestroj error = goodix_i2c_read(client, GOODIX_REG_ID, 881ca96ea86SBastien Nocera &test, 1); 882ca96ea86SBastien Nocera if (!error) 883ca96ea86SBastien Nocera return 0; 884ca96ea86SBastien Nocera 885ca96ea86SBastien Nocera dev_err(&client->dev, "i2c test failed attempt %d: %d\n", 886ca96ea86SBastien Nocera retry, error); 887ca96ea86SBastien Nocera msleep(20); 888ca96ea86SBastien Nocera } 889ca96ea86SBastien Nocera 890ca96ea86SBastien Nocera return error; 891ca96ea86SBastien Nocera } 892ca96ea86SBastien Nocera 893ca96ea86SBastien Nocera /** 89468caf858SIrina Tirdea * goodix_configure_dev - Finish device initialization 89568caf858SIrina Tirdea * 89668caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 89768caf858SIrina Tirdea * 89868caf858SIrina Tirdea * Must be called from probe to finish initialization of the device. 89968caf858SIrina Tirdea * Contains the common initialization code for both devices that 90068caf858SIrina Tirdea * declare gpio pins and devices that do not. It is either called 90168caf858SIrina Tirdea * directly from probe or from request_firmware_wait callback. 90268caf858SIrina Tirdea */ 90368caf858SIrina Tirdea static int goodix_configure_dev(struct goodix_ts_data *ts) 90468caf858SIrina Tirdea { 90568caf858SIrina Tirdea int error; 90668caf858SIrina Tirdea 907fafef982SMarcin Niestroj ts->int_trigger_type = GOODIX_INT_TRIGGER; 908fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 909ad48cf5eSKarsten Merker 910fafef982SMarcin Niestroj ts->input_dev = devm_input_allocate_device(&ts->client->dev); 911fafef982SMarcin Niestroj if (!ts->input_dev) { 912fafef982SMarcin Niestroj dev_err(&ts->client->dev, "Failed to allocate input device."); 913fafef982SMarcin Niestroj return -ENOMEM; 914fafef982SMarcin Niestroj } 915fafef982SMarcin Niestroj 916fafef982SMarcin Niestroj ts->input_dev->name = "Goodix Capacitive TouchScreen"; 917fafef982SMarcin Niestroj ts->input_dev->phys = "input/ts"; 918fafef982SMarcin Niestroj ts->input_dev->id.bustype = BUS_I2C; 919fafef982SMarcin Niestroj ts->input_dev->id.vendor = 0x0416; 920fafef982SMarcin Niestroj ts->input_dev->id.product = ts->id; 921fafef982SMarcin Niestroj ts->input_dev->id.version = ts->version; 922fafef982SMarcin Niestroj 923fafef982SMarcin Niestroj /* Capacitive Windows/Home button on some devices */ 924fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_KEY, KEY_LEFTMETA); 925fafef982SMarcin Niestroj 926fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X); 927fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y); 928fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 929fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 930fafef982SMarcin Niestroj 931fafef982SMarcin Niestroj /* Read configuration and apply touchscreen parameters */ 93268caf858SIrina Tirdea goodix_read_config(ts); 93368caf858SIrina Tirdea 934fafef982SMarcin Niestroj /* Try overriding touchscreen parameters via device properties */ 935fafef982SMarcin Niestroj touchscreen_parse_properties(ts->input_dev, true, &ts->prop); 936fafef982SMarcin Niestroj 937fafef982SMarcin Niestroj if (!ts->prop.max_x || !ts->prop.max_y || !ts->max_touch_num) { 938c1c00aa5SGuido Günther dev_err(&ts->client->dev, 939c1c00aa5SGuido Günther "Invalid config (%d, %d, %d), using defaults\n", 940c1c00aa5SGuido Günther ts->prop.max_x, ts->prop.max_y, ts->max_touch_num); 941fafef982SMarcin Niestroj ts->prop.max_x = GOODIX_MAX_WIDTH - 1; 942fafef982SMarcin Niestroj ts->prop.max_y = GOODIX_MAX_HEIGHT - 1; 943fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 944fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 945fafef982SMarcin Niestroj ABS_MT_POSITION_X, ts->prop.max_x); 946fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 947fafef982SMarcin Niestroj ABS_MT_POSITION_Y, ts->prop.max_y); 948fafef982SMarcin Niestroj } 949fafef982SMarcin Niestroj 950fafef982SMarcin Niestroj if (dmi_check_system(rotated_screen)) { 951fafef982SMarcin Niestroj ts->prop.invert_x = true; 952fafef982SMarcin Niestroj ts->prop.invert_y = true; 953fafef982SMarcin Niestroj dev_dbg(&ts->client->dev, 954fafef982SMarcin Niestroj "Applying '180 degrees rotated screen' quirk\n"); 955fafef982SMarcin Niestroj } 956fafef982SMarcin Niestroj 957bd3b8480SYauhen Kharuzhy if (dmi_check_system(nine_bytes_report)) { 958bd3b8480SYauhen Kharuzhy ts->contact_size = 9; 959bd3b8480SYauhen Kharuzhy 960bd3b8480SYauhen Kharuzhy dev_dbg(&ts->client->dev, 961bd3b8480SYauhen Kharuzhy "Non-standard 9-bytes report format quirk\n"); 962bd3b8480SYauhen Kharuzhy } 963bd3b8480SYauhen Kharuzhy 9641dd5ddc1SSergei A. Trusov if (dmi_check_system(inverted_x_screen)) { 9651dd5ddc1SSergei A. Trusov ts->prop.invert_x = true; 9661dd5ddc1SSergei A. Trusov dev_dbg(&ts->client->dev, 9671dd5ddc1SSergei A. Trusov "Applying 'inverted x screen' quirk\n"); 9681dd5ddc1SSergei A. Trusov } 9691dd5ddc1SSergei A. Trusov 970fafef982SMarcin Niestroj error = input_mt_init_slots(ts->input_dev, ts->max_touch_num, 971fafef982SMarcin Niestroj INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); 972fafef982SMarcin Niestroj if (error) { 973fafef982SMarcin Niestroj dev_err(&ts->client->dev, 974fafef982SMarcin Niestroj "Failed to initialize MT slots: %d", error); 97568caf858SIrina Tirdea return error; 976fafef982SMarcin Niestroj } 977fafef982SMarcin Niestroj 978fafef982SMarcin Niestroj error = input_register_device(ts->input_dev); 979fafef982SMarcin Niestroj if (error) { 980fafef982SMarcin Niestroj dev_err(&ts->client->dev, 981fafef982SMarcin Niestroj "Failed to register input device: %d", error); 982fafef982SMarcin Niestroj return error; 983fafef982SMarcin Niestroj } 98468caf858SIrina Tirdea 9855ab09d6aSIrina Tirdea ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT; 9865ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 98768caf858SIrina Tirdea if (error) { 98868caf858SIrina Tirdea dev_err(&ts->client->dev, "request IRQ failed: %d\n", error); 98968caf858SIrina Tirdea return error; 99068caf858SIrina Tirdea } 99168caf858SIrina Tirdea 99268caf858SIrina Tirdea return 0; 99368caf858SIrina Tirdea } 99468caf858SIrina Tirdea 99568caf858SIrina Tirdea /** 99668caf858SIrina Tirdea * goodix_config_cb - Callback to finish device init 99768caf858SIrina Tirdea * 99868caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 99968caf858SIrina Tirdea * 100068caf858SIrina Tirdea * request_firmware_wait callback that finishes 100168caf858SIrina Tirdea * initialization of the device. 100268caf858SIrina Tirdea */ 100368caf858SIrina Tirdea static void goodix_config_cb(const struct firmware *cfg, void *ctx) 100468caf858SIrina Tirdea { 100568caf858SIrina Tirdea struct goodix_ts_data *ts = ctx; 100668caf858SIrina Tirdea int error; 100768caf858SIrina Tirdea 100868caf858SIrina Tirdea if (cfg) { 100968caf858SIrina Tirdea /* send device configuration to the firmware */ 101068caf858SIrina Tirdea error = goodix_send_cfg(ts, cfg); 101168caf858SIrina Tirdea if (error) 101268caf858SIrina Tirdea goto err_release_cfg; 101368caf858SIrina Tirdea } 101468caf858SIrina Tirdea 101568caf858SIrina Tirdea goodix_configure_dev(ts); 101668caf858SIrina Tirdea 101768caf858SIrina Tirdea err_release_cfg: 101868caf858SIrina Tirdea release_firmware(cfg); 101968caf858SIrina Tirdea complete_all(&ts->firmware_loading_complete); 102068caf858SIrina Tirdea } 102168caf858SIrina Tirdea 1022ae97fb58SJagan Teki static void goodix_disable_regulators(void *arg) 1023ae97fb58SJagan Teki { 1024ae97fb58SJagan Teki struct goodix_ts_data *ts = arg; 1025ae97fb58SJagan Teki 1026ae97fb58SJagan Teki regulator_disable(ts->vddio); 1027ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1028ae97fb58SJagan Teki } 1029ae97fb58SJagan Teki 1030ca96ea86SBastien Nocera static int goodix_ts_probe(struct i2c_client *client, 1031ca96ea86SBastien Nocera const struct i2c_device_id *id) 1032ca96ea86SBastien Nocera { 1033ca96ea86SBastien Nocera struct goodix_ts_data *ts; 1034ca96ea86SBastien Nocera int error; 1035ca96ea86SBastien Nocera 1036ca96ea86SBastien Nocera dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr); 1037ca96ea86SBastien Nocera 1038ca96ea86SBastien Nocera if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 1039ca96ea86SBastien Nocera dev_err(&client->dev, "I2C check functionality failed.\n"); 1040ca96ea86SBastien Nocera return -ENXIO; 1041ca96ea86SBastien Nocera } 1042ca96ea86SBastien Nocera 1043ca96ea86SBastien Nocera ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); 1044ca96ea86SBastien Nocera if (!ts) 1045ca96ea86SBastien Nocera return -ENOMEM; 1046ca96ea86SBastien Nocera 1047ca96ea86SBastien Nocera ts->client = client; 1048ca96ea86SBastien Nocera i2c_set_clientdata(client, ts); 104968caf858SIrina Tirdea init_completion(&ts->firmware_loading_complete); 1050bd3b8480SYauhen Kharuzhy ts->contact_size = GOODIX_CONTACT_SIZE; 1051ca96ea86SBastien Nocera 1052ec6e1b40SIrina Tirdea error = goodix_get_gpio_config(ts); 1053ec6e1b40SIrina Tirdea if (error) 1054ec6e1b40SIrina Tirdea return error; 1055ec6e1b40SIrina Tirdea 1056ae97fb58SJagan Teki /* power up the controller */ 1057ae97fb58SJagan Teki error = regulator_enable(ts->avdd28); 1058ae97fb58SJagan Teki if (error) { 1059ae97fb58SJagan Teki dev_err(&client->dev, 1060ae97fb58SJagan Teki "Failed to enable AVDD28 regulator: %d\n", 1061ae97fb58SJagan Teki error); 1062ae97fb58SJagan Teki return error; 1063ae97fb58SJagan Teki } 1064ae97fb58SJagan Teki 1065ae97fb58SJagan Teki error = regulator_enable(ts->vddio); 1066ae97fb58SJagan Teki if (error) { 1067ae97fb58SJagan Teki dev_err(&client->dev, 1068ae97fb58SJagan Teki "Failed to enable VDDIO regulator: %d\n", 1069ae97fb58SJagan Teki error); 1070ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1071ae97fb58SJagan Teki return error; 1072ae97fb58SJagan Teki } 1073ae97fb58SJagan Teki 1074ae97fb58SJagan Teki error = devm_add_action_or_reset(&client->dev, 1075ae97fb58SJagan Teki goodix_disable_regulators, ts); 1076ae97fb58SJagan Teki if (error) 1077ae97fb58SJagan Teki return error; 1078ae97fb58SJagan Teki 10791921daceSHans de Goede if (ts->reset_controller_at_probe) { 1080ec6e1b40SIrina Tirdea /* reset the controller */ 1081ec6e1b40SIrina Tirdea error = goodix_reset(ts); 1082ec6e1b40SIrina Tirdea if (error) { 1083ec6e1b40SIrina Tirdea dev_err(&client->dev, "Controller reset failed.\n"); 1084ec6e1b40SIrina Tirdea return error; 1085ec6e1b40SIrina Tirdea } 1086ec6e1b40SIrina Tirdea } 1087ec6e1b40SIrina Tirdea 1088ca96ea86SBastien Nocera error = goodix_i2c_test(client); 1089ca96ea86SBastien Nocera if (error) { 1090ca96ea86SBastien Nocera dev_err(&client->dev, "I2C communication failure: %d\n", error); 1091ca96ea86SBastien Nocera return error; 1092ca96ea86SBastien Nocera } 1093ca96ea86SBastien Nocera 109468caf858SIrina Tirdea error = goodix_read_version(ts); 1095ca96ea86SBastien Nocera if (error) { 1096ca96ea86SBastien Nocera dev_err(&client->dev, "Read version failed.\n"); 1097ca96ea86SBastien Nocera return error; 1098ca96ea86SBastien Nocera } 1099ca96ea86SBastien Nocera 110025309004SMarcin Niestroj ts->chip = goodix_get_chip_data(ts->id); 1101a779fbc6SIrina Tirdea 1102e070a97bSHans de Goede if (ts->load_cfg_from_disk) { 110368caf858SIrina Tirdea /* update device config */ 110468caf858SIrina Tirdea ts->cfg_name = devm_kasprintf(&client->dev, GFP_KERNEL, 110568caf858SIrina Tirdea "goodix_%d_cfg.bin", ts->id); 110668caf858SIrina Tirdea if (!ts->cfg_name) 110768caf858SIrina Tirdea return -ENOMEM; 1108ca96ea86SBastien Nocera 110968caf858SIrina Tirdea error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name, 111068caf858SIrina Tirdea &client->dev, GFP_KERNEL, ts, 111168caf858SIrina Tirdea goodix_config_cb); 1112ca96ea86SBastien Nocera if (error) { 111368caf858SIrina Tirdea dev_err(&client->dev, 111468caf858SIrina Tirdea "Failed to invoke firmware loader: %d\n", 111568caf858SIrina Tirdea error); 1116ca96ea86SBastien Nocera return error; 1117ca96ea86SBastien Nocera } 1118ca96ea86SBastien Nocera 1119ca96ea86SBastien Nocera return 0; 112068caf858SIrina Tirdea } else { 112168caf858SIrina Tirdea error = goodix_configure_dev(ts); 112268caf858SIrina Tirdea if (error) 112368caf858SIrina Tirdea return error; 112468caf858SIrina Tirdea } 112568caf858SIrina Tirdea 112668caf858SIrina Tirdea return 0; 112768caf858SIrina Tirdea } 112868caf858SIrina Tirdea 112968caf858SIrina Tirdea static int goodix_ts_remove(struct i2c_client *client) 113068caf858SIrina Tirdea { 113168caf858SIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 113268caf858SIrina Tirdea 1133e070a97bSHans de Goede if (ts->load_cfg_from_disk) 113468caf858SIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 113568caf858SIrina Tirdea 113668caf858SIrina Tirdea return 0; 1137ca96ea86SBastien Nocera } 1138ca96ea86SBastien Nocera 11395ab09d6aSIrina Tirdea static int __maybe_unused goodix_suspend(struct device *dev) 11405ab09d6aSIrina Tirdea { 11415ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 11425ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 11435ab09d6aSIrina Tirdea int error; 11445ab09d6aSIrina Tirdea 1145e070a97bSHans de Goede if (ts->load_cfg_from_disk) 1146e070a97bSHans de Goede wait_for_completion(&ts->firmware_loading_complete); 1147e070a97bSHans de Goede 11485ab09d6aSIrina Tirdea /* We need gpio pins to suspend/resume */ 114949db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1150faec44b6SHans de Goede disable_irq(client->irq); 11515ab09d6aSIrina Tirdea return 0; 1152faec44b6SHans de Goede } 11535ab09d6aSIrina Tirdea 11545ab09d6aSIrina Tirdea /* Free IRQ as IRQ pin is used as output in the suspend sequence */ 11555ab09d6aSIrina Tirdea goodix_free_irq(ts); 11565ab09d6aSIrina Tirdea 11575ab09d6aSIrina Tirdea /* Output LOW on the INT pin for 5 ms */ 115849db3997SHans de Goede error = goodix_irq_direction_output(ts, 0); 11595ab09d6aSIrina Tirdea if (error) { 11605ab09d6aSIrina Tirdea goodix_request_irq(ts); 11615ab09d6aSIrina Tirdea return error; 11625ab09d6aSIrina Tirdea } 11635ab09d6aSIrina Tirdea 11645ab09d6aSIrina Tirdea usleep_range(5000, 6000); 11655ab09d6aSIrina Tirdea 11665ab09d6aSIrina Tirdea error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND, 11675ab09d6aSIrina Tirdea GOODIX_CMD_SCREEN_OFF); 11685ab09d6aSIrina Tirdea if (error) { 11695ab09d6aSIrina Tirdea dev_err(&ts->client->dev, "Screen off command failed\n"); 117049db3997SHans de Goede goodix_irq_direction_input(ts); 11715ab09d6aSIrina Tirdea goodix_request_irq(ts); 11725ab09d6aSIrina Tirdea return -EAGAIN; 11735ab09d6aSIrina Tirdea } 11745ab09d6aSIrina Tirdea 11755ab09d6aSIrina Tirdea /* 11765ab09d6aSIrina Tirdea * The datasheet specifies that the interval between sending screen-off 11775ab09d6aSIrina Tirdea * command and wake-up should be longer than 58 ms. To avoid waking up 11785ab09d6aSIrina Tirdea * sooner, delay 58ms here. 11795ab09d6aSIrina Tirdea */ 11805ab09d6aSIrina Tirdea msleep(58); 11815ab09d6aSIrina Tirdea return 0; 11825ab09d6aSIrina Tirdea } 11835ab09d6aSIrina Tirdea 11845ab09d6aSIrina Tirdea static int __maybe_unused goodix_resume(struct device *dev) 11855ab09d6aSIrina Tirdea { 11865ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 11875ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 11885ab09d6aSIrina Tirdea int error; 11895ab09d6aSIrina Tirdea 119049db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1191faec44b6SHans de Goede enable_irq(client->irq); 11925ab09d6aSIrina Tirdea return 0; 1193faec44b6SHans de Goede } 11945ab09d6aSIrina Tirdea 11955ab09d6aSIrina Tirdea /* 11965ab09d6aSIrina Tirdea * Exit sleep mode by outputting HIGH level to INT pin 11975ab09d6aSIrina Tirdea * for 2ms~5ms. 11985ab09d6aSIrina Tirdea */ 119949db3997SHans de Goede error = goodix_irq_direction_output(ts, 1); 12005ab09d6aSIrina Tirdea if (error) 12015ab09d6aSIrina Tirdea return error; 12025ab09d6aSIrina Tirdea 12035ab09d6aSIrina Tirdea usleep_range(2000, 5000); 12045ab09d6aSIrina Tirdea 12055ab09d6aSIrina Tirdea error = goodix_int_sync(ts); 12065ab09d6aSIrina Tirdea if (error) 12075ab09d6aSIrina Tirdea return error; 12085ab09d6aSIrina Tirdea 12095ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 12105ab09d6aSIrina Tirdea if (error) 12115ab09d6aSIrina Tirdea return error; 12125ab09d6aSIrina Tirdea 12135ab09d6aSIrina Tirdea return 0; 12145ab09d6aSIrina Tirdea } 12155ab09d6aSIrina Tirdea 12165ab09d6aSIrina Tirdea static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume); 12175ab09d6aSIrina Tirdea 1218ca96ea86SBastien Nocera static const struct i2c_device_id goodix_ts_id[] = { 1219ca96ea86SBastien Nocera { "GDIX1001:00", 0 }, 1220ca96ea86SBastien Nocera { } 1221ca96ea86SBastien Nocera }; 12222e9e910eSJavier Martinez Canillas MODULE_DEVICE_TABLE(i2c, goodix_ts_id); 1223ca96ea86SBastien Nocera 1224771d8f1bSAleksei Mamlin #ifdef CONFIG_ACPI 1225ca96ea86SBastien Nocera static const struct acpi_device_id goodix_acpi_match[] = { 1226ca96ea86SBastien Nocera { "GDIX1001", 0 }, 12275ca4d1aeSEthan Lee { "GDIX1002", 0 }, 1228ca96ea86SBastien Nocera { } 1229ca96ea86SBastien Nocera }; 1230ca96ea86SBastien Nocera MODULE_DEVICE_TABLE(acpi, goodix_acpi_match); 1231771d8f1bSAleksei Mamlin #endif 1232771d8f1bSAleksei Mamlin 1233771d8f1bSAleksei Mamlin #ifdef CONFIG_OF 1234771d8f1bSAleksei Mamlin static const struct of_device_id goodix_of_match[] = { 123525309004SMarcin Niestroj { .compatible = "goodix,gt1151" }, 1236a5f50c50SJagan Teki { .compatible = "goodix,gt5663" }, 123784ef1b33SGuido Günther { .compatible = "goodix,gt5688" }, 1238771d8f1bSAleksei Mamlin { .compatible = "goodix,gt911" }, 1239771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9110" }, 1240771d8f1bSAleksei Mamlin { .compatible = "goodix,gt912" }, 1241771d8f1bSAleksei Mamlin { .compatible = "goodix,gt927" }, 1242771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9271" }, 1243771d8f1bSAleksei Mamlin { .compatible = "goodix,gt928" }, 1244771d8f1bSAleksei Mamlin { .compatible = "goodix,gt967" }, 1245771d8f1bSAleksei Mamlin { } 1246771d8f1bSAleksei Mamlin }; 1247771d8f1bSAleksei Mamlin MODULE_DEVICE_TABLE(of, goodix_of_match); 1248771d8f1bSAleksei Mamlin #endif 1249ca96ea86SBastien Nocera 1250ca96ea86SBastien Nocera static struct i2c_driver goodix_ts_driver = { 1251ca96ea86SBastien Nocera .probe = goodix_ts_probe, 125268caf858SIrina Tirdea .remove = goodix_ts_remove, 1253ca96ea86SBastien Nocera .id_table = goodix_ts_id, 1254ca96ea86SBastien Nocera .driver = { 1255ca96ea86SBastien Nocera .name = "Goodix-TS", 1256771d8f1bSAleksei Mamlin .acpi_match_table = ACPI_PTR(goodix_acpi_match), 1257771d8f1bSAleksei Mamlin .of_match_table = of_match_ptr(goodix_of_match), 12585ab09d6aSIrina Tirdea .pm = &goodix_pm_ops, 1259ca96ea86SBastien Nocera }, 1260ca96ea86SBastien Nocera }; 1261ca96ea86SBastien Nocera module_i2c_driver(goodix_ts_driver); 1262ca96ea86SBastien Nocera 1263ca96ea86SBastien Nocera MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); 1264ca96ea86SBastien Nocera MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>"); 1265ca96ea86SBastien Nocera MODULE_DESCRIPTION("Goodix touchscreen driver"); 1266ca96ea86SBastien Nocera MODULE_LICENSE("GPL v2"); 1267