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 62967abd9eeSHans de Goede #include <asm/cpu_device_id.h> 63067abd9eeSHans de Goede #include <asm/intel-family.h> 63167abd9eeSHans de Goede 63267abd9eeSHans de Goede static const struct x86_cpu_id baytrail_cpu_ids[] = { 63367abd9eeSHans de Goede { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT, X86_FEATURE_ANY, }, 63467abd9eeSHans de Goede {} 63567abd9eeSHans de Goede }; 63667abd9eeSHans de Goede 63767abd9eeSHans de Goede static inline bool is_byt(void) 63867abd9eeSHans de Goede { 63967abd9eeSHans de Goede const struct x86_cpu_id *id = x86_match_cpu(baytrail_cpu_ids); 64067abd9eeSHans de Goede 64167abd9eeSHans de Goede return !!id; 64267abd9eeSHans de Goede } 64367abd9eeSHans de Goede 644a7d4b171SHans de Goede static const struct acpi_gpio_params first_gpio = { 0, 0, false }; 645a7d4b171SHans de Goede static const struct acpi_gpio_params second_gpio = { 1, 0, false }; 646a7d4b171SHans de Goede 647a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_first_gpios[] = { 648a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &first_gpio, 1 }, 649a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &second_gpio, 1 }, 650a7d4b171SHans de Goede { }, 651a7d4b171SHans de Goede }; 652a7d4b171SHans de Goede 653a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_last_gpios[] = { 654a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 655a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &second_gpio, 1 }, 656a7d4b171SHans de Goede { }, 657a7d4b171SHans de Goede }; 658a7d4b171SHans de Goede 659a7d4b171SHans de Goede static int goodix_resource(struct acpi_resource *ares, void *data) 660a7d4b171SHans de Goede { 661a7d4b171SHans de Goede struct goodix_ts_data *ts = data; 662a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 663a7d4b171SHans de Goede struct acpi_resource_gpio *gpio; 664a7d4b171SHans de Goede 665a7d4b171SHans de Goede switch (ares->type) { 666a7d4b171SHans de Goede case ACPI_RESOURCE_TYPE_GPIO: 667a7d4b171SHans de Goede gpio = &ares->data.gpio; 668a7d4b171SHans de Goede if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { 669a7d4b171SHans de Goede if (ts->gpio_int_idx == -1) { 670a7d4b171SHans de Goede ts->gpio_int_idx = ts->gpio_count; 671a7d4b171SHans de Goede } else { 672a7d4b171SHans de Goede dev_err(dev, "More then one GpioInt resource, ignoring ACPI GPIO resources\n"); 673a7d4b171SHans de Goede ts->gpio_int_idx = -2; 674a7d4b171SHans de Goede } 675a7d4b171SHans de Goede } 676a7d4b171SHans de Goede ts->gpio_count++; 677a7d4b171SHans de Goede break; 678a7d4b171SHans de Goede default: 679a7d4b171SHans de Goede break; 680a7d4b171SHans de Goede } 681a7d4b171SHans de Goede 682a7d4b171SHans de Goede return 0; 683a7d4b171SHans de Goede } 684a7d4b171SHans de Goede 685a7d4b171SHans de Goede /* 686a7d4b171SHans de Goede * This function gets called in case we fail to get the irq GPIO directly 687a7d4b171SHans de Goede * because the ACPI tables lack GPIO-name to APCI _CRS index mappings 688a7d4b171SHans de Goede * (no _DSD UUID daffd814-6eba-4d8c-8a91-bc9bbf4aa301 data). 689a7d4b171SHans de Goede * In that case we add our own mapping and then goodix_get_gpio_config() 690a7d4b171SHans de Goede * retries to get the GPIOs based on the added mapping. 691a7d4b171SHans de Goede */ 692a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 693a7d4b171SHans de Goede { 694a7d4b171SHans de Goede const struct acpi_gpio_mapping *gpio_mapping = NULL; 695a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 696a7d4b171SHans de Goede LIST_HEAD(resources); 697a7d4b171SHans de Goede int ret; 698a7d4b171SHans de Goede 699a7d4b171SHans de Goede ts->gpio_count = 0; 700a7d4b171SHans de Goede ts->gpio_int_idx = -1; 701a7d4b171SHans de Goede ret = acpi_dev_get_resources(ACPI_COMPANION(dev), &resources, 702a7d4b171SHans de Goede goodix_resource, ts); 703a7d4b171SHans de Goede if (ret < 0) { 704a7d4b171SHans de Goede dev_err(dev, "Error getting ACPI resources: %d\n", ret); 705a7d4b171SHans de Goede return ret; 706a7d4b171SHans de Goede } 707a7d4b171SHans de Goede 708a7d4b171SHans de Goede acpi_dev_free_resource_list(&resources); 709a7d4b171SHans de Goede 710a7d4b171SHans de Goede if (ts->gpio_count == 2 && ts->gpio_int_idx == 0) { 711a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 712a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_first_gpios; 713a7d4b171SHans de Goede } else if (ts->gpio_count == 2 && ts->gpio_int_idx == 1) { 714a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 715a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_last_gpios; 71667abd9eeSHans de Goede } else if (is_byt() && ts->gpio_count == 2 && ts->gpio_int_idx == -1) { 71767abd9eeSHans de Goede dev_info(dev, "No ACPI GpioInt resource, assuming that the GPIO order is reset, int\n"); 71867abd9eeSHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 71967abd9eeSHans de Goede gpio_mapping = acpi_goodix_int_last_gpios; 720a7d4b171SHans de Goede } else { 721a7d4b171SHans de Goede dev_warn(dev, "Unexpected ACPI resources: gpio_count %d, gpio_int_idx %d\n", 722a7d4b171SHans de Goede ts->gpio_count, ts->gpio_int_idx); 723a7d4b171SHans de Goede return -EINVAL; 724a7d4b171SHans de Goede } 725a7d4b171SHans de Goede 726a7d4b171SHans de Goede return devm_acpi_dev_add_driver_gpios(dev, gpio_mapping); 727a7d4b171SHans de Goede } 728a7d4b171SHans de Goede #else 729a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 730a7d4b171SHans de Goede { 731a7d4b171SHans de Goede return -EINVAL; 732a7d4b171SHans de Goede } 733a7d4b171SHans de Goede #endif /* CONFIG_X86 && CONFIG_ACPI */ 734a7d4b171SHans de Goede 735ec6e1b40SIrina Tirdea /** 736ec6e1b40SIrina Tirdea * goodix_get_gpio_config - Get GPIO config from ACPI/DT 737ec6e1b40SIrina Tirdea * 738ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 739ec6e1b40SIrina Tirdea */ 740ec6e1b40SIrina Tirdea static int goodix_get_gpio_config(struct goodix_ts_data *ts) 741ec6e1b40SIrina Tirdea { 742ec6e1b40SIrina Tirdea int error; 743ec6e1b40SIrina Tirdea struct device *dev; 744ec6e1b40SIrina Tirdea struct gpio_desc *gpiod; 745a7d4b171SHans de Goede bool added_acpi_mappings = false; 746ec6e1b40SIrina Tirdea 747ec6e1b40SIrina Tirdea if (!ts->client) 748ec6e1b40SIrina Tirdea return -EINVAL; 749ec6e1b40SIrina Tirdea dev = &ts->client->dev; 750ec6e1b40SIrina Tirdea 751ae97fb58SJagan Teki ts->avdd28 = devm_regulator_get(dev, "AVDD28"); 752ae97fb58SJagan Teki if (IS_ERR(ts->avdd28)) { 753ae97fb58SJagan Teki error = PTR_ERR(ts->avdd28); 754ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 755ae97fb58SJagan Teki dev_err(dev, 756ae97fb58SJagan Teki "Failed to get AVDD28 regulator: %d\n", error); 757ae97fb58SJagan Teki return error; 758ae97fb58SJagan Teki } 759ae97fb58SJagan Teki 760ae97fb58SJagan Teki ts->vddio = devm_regulator_get(dev, "VDDIO"); 761ae97fb58SJagan Teki if (IS_ERR(ts->vddio)) { 762ae97fb58SJagan Teki error = PTR_ERR(ts->vddio); 763ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 764ae97fb58SJagan Teki dev_err(dev, 765ae97fb58SJagan Teki "Failed to get VDDIO regulator: %d\n", error); 766ae97fb58SJagan Teki return error; 767ae97fb58SJagan Teki } 768ae97fb58SJagan Teki 769a7d4b171SHans de Goede retry_get_irq_gpio: 770ec6e1b40SIrina Tirdea /* Get the interrupt GPIO pin number */ 771ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN); 772ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 773ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 774ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 775ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 776ec6e1b40SIrina Tirdea GOODIX_GPIO_INT_NAME, error); 777ec6e1b40SIrina Tirdea return error; 778ec6e1b40SIrina Tirdea } 779a7d4b171SHans de Goede if (!gpiod && has_acpi_companion(dev) && !added_acpi_mappings) { 780a7d4b171SHans de Goede added_acpi_mappings = true; 781a7d4b171SHans de Goede if (goodix_add_acpi_gpio_mappings(ts) == 0) 782a7d4b171SHans de Goede goto retry_get_irq_gpio; 783a7d4b171SHans de Goede } 784ec6e1b40SIrina Tirdea 785ec6e1b40SIrina Tirdea ts->gpiod_int = gpiod; 786ec6e1b40SIrina Tirdea 787ec6e1b40SIrina Tirdea /* Get the reset line GPIO pin number */ 788ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, GPIOD_IN); 789ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 790ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 791ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 792ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 793ec6e1b40SIrina Tirdea GOODIX_GPIO_RST_NAME, error); 794ec6e1b40SIrina Tirdea return error; 795ec6e1b40SIrina Tirdea } 796ec6e1b40SIrina Tirdea 797ec6e1b40SIrina Tirdea ts->gpiod_rst = gpiod; 798ec6e1b40SIrina Tirdea 799a7d4b171SHans de Goede switch (ts->irq_pin_access_method) { 800a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 801a7d4b171SHans de Goede /* 802a7d4b171SHans de Goede * We end up here if goodix_add_acpi_gpio_mappings() has 803a7d4b171SHans de Goede * called devm_acpi_dev_add_driver_gpios() because the ACPI 804a7d4b171SHans de Goede * tables did not contain name to index mappings. 805a7d4b171SHans de Goede * Check that we successfully got both GPIOs after we've 806a7d4b171SHans de Goede * added our own acpi_gpio_mapping and if we did not get both 807a7d4b171SHans de Goede * GPIOs reset irq_pin_access_method to IRQ_PIN_ACCESS_NONE. 808a7d4b171SHans de Goede */ 809a7d4b171SHans de Goede if (!ts->gpiod_int || !ts->gpiod_rst) 810a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 811a7d4b171SHans de Goede break; 812a7d4b171SHans de Goede default: 813e070a97bSHans de Goede if (ts->gpiod_int && ts->gpiod_rst) { 8141921daceSHans de Goede ts->reset_controller_at_probe = true; 815e070a97bSHans de Goede ts->load_cfg_from_disk = true; 81649db3997SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_GPIO; 817e070a97bSHans de Goede } 818a7d4b171SHans de Goede } 81949db3997SHans de Goede 820ec6e1b40SIrina Tirdea return 0; 821ec6e1b40SIrina Tirdea } 822ec6e1b40SIrina Tirdea 823ca96ea86SBastien Nocera /** 824ca96ea86SBastien Nocera * goodix_read_config - Read the embedded configuration of the panel 825ca96ea86SBastien Nocera * 826ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 827ca96ea86SBastien Nocera * 828ca96ea86SBastien Nocera * Must be called during probe 829ca96ea86SBastien Nocera */ 830ca96ea86SBastien Nocera static void goodix_read_config(struct goodix_ts_data *ts) 831ca96ea86SBastien Nocera { 832ca96ea86SBastien Nocera u8 config[GOODIX_CONFIG_MAX_LENGTH]; 833fafef982SMarcin Niestroj int x_max, y_max; 834ca96ea86SBastien Nocera int error; 835ca96ea86SBastien Nocera 83625309004SMarcin Niestroj error = goodix_i2c_read(ts->client, ts->chip->config_addr, 83725309004SMarcin Niestroj config, ts->chip->config_len); 838ca96ea86SBastien Nocera if (error) { 839fafef982SMarcin Niestroj dev_warn(&ts->client->dev, "Error reading config: %d\n", 840ca96ea86SBastien Nocera error); 841ca96ea86SBastien Nocera ts->int_trigger_type = GOODIX_INT_TRIGGER; 842a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 843ca96ea86SBastien Nocera return; 844ca96ea86SBastien Nocera } 845ca96ea86SBastien Nocera 846a7ac7c95SAleksei Mamlin ts->int_trigger_type = config[TRIGGER_LOC] & 0x03; 847a7ac7c95SAleksei Mamlin ts->max_touch_num = config[MAX_CONTACTS_LOC] & 0x0f; 8488b5a359cSBastien Nocera 849fafef982SMarcin Niestroj x_max = get_unaligned_le16(&config[RESOLUTION_LOC]); 850fafef982SMarcin Niestroj y_max = get_unaligned_le16(&config[RESOLUTION_LOC + 2]); 851fafef982SMarcin Niestroj if (x_max && y_max) { 852fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_X, x_max - 1); 853fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_Y, y_max - 1); 854ca96ea86SBastien Nocera } 85557c80e8eSKarsten Merker } 856ca96ea86SBastien Nocera 857ca96ea86SBastien Nocera /** 858ca96ea86SBastien Nocera * goodix_read_version - Read goodix touchscreen version 859ca96ea86SBastien Nocera * 86068caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 861ca96ea86SBastien Nocera */ 86268caf858SIrina Tirdea static int goodix_read_version(struct goodix_ts_data *ts) 863ca96ea86SBastien Nocera { 864ca96ea86SBastien Nocera int error; 865ca96ea86SBastien Nocera u8 buf[6]; 866e70b0307SIrina Tirdea char id_str[5]; 867ca96ea86SBastien Nocera 86868caf858SIrina Tirdea error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf)); 869ca96ea86SBastien Nocera if (error) { 87068caf858SIrina Tirdea dev_err(&ts->client->dev, "read version failed: %d\n", error); 871ca96ea86SBastien Nocera return error; 872ca96ea86SBastien Nocera } 873ca96ea86SBastien Nocera 874e70b0307SIrina Tirdea memcpy(id_str, buf, 4); 875e70b0307SIrina Tirdea id_str[4] = 0; 87668caf858SIrina Tirdea if (kstrtou16(id_str, 10, &ts->id)) 87768caf858SIrina Tirdea ts->id = 0x1001; 878e70b0307SIrina Tirdea 87968caf858SIrina Tirdea ts->version = get_unaligned_le16(&buf[4]); 880ca96ea86SBastien Nocera 88168caf858SIrina Tirdea dev_info(&ts->client->dev, "ID %d, version: %04x\n", ts->id, 88268caf858SIrina Tirdea ts->version); 883ca96ea86SBastien Nocera 884ca96ea86SBastien Nocera return 0; 885ca96ea86SBastien Nocera } 886ca96ea86SBastien Nocera 887ca96ea86SBastien Nocera /** 888ca96ea86SBastien Nocera * goodix_i2c_test - I2C test function to check if the device answers. 889ca96ea86SBastien Nocera * 890ca96ea86SBastien Nocera * @client: the i2c client 891ca96ea86SBastien Nocera */ 892ca96ea86SBastien Nocera static int goodix_i2c_test(struct i2c_client *client) 893ca96ea86SBastien Nocera { 894ca96ea86SBastien Nocera int retry = 0; 895ca96ea86SBastien Nocera int error; 896ca96ea86SBastien Nocera u8 test; 897ca96ea86SBastien Nocera 898ca96ea86SBastien Nocera while (retry++ < 2) { 89925309004SMarcin Niestroj error = goodix_i2c_read(client, GOODIX_REG_ID, 900ca96ea86SBastien Nocera &test, 1); 901ca96ea86SBastien Nocera if (!error) 902ca96ea86SBastien Nocera return 0; 903ca96ea86SBastien Nocera 904ca96ea86SBastien Nocera dev_err(&client->dev, "i2c test failed attempt %d: %d\n", 905ca96ea86SBastien Nocera retry, error); 906ca96ea86SBastien Nocera msleep(20); 907ca96ea86SBastien Nocera } 908ca96ea86SBastien Nocera 909ca96ea86SBastien Nocera return error; 910ca96ea86SBastien Nocera } 911ca96ea86SBastien Nocera 912ca96ea86SBastien Nocera /** 91368caf858SIrina Tirdea * goodix_configure_dev - Finish device initialization 91468caf858SIrina Tirdea * 91568caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 91668caf858SIrina Tirdea * 91768caf858SIrina Tirdea * Must be called from probe to finish initialization of the device. 91868caf858SIrina Tirdea * Contains the common initialization code for both devices that 91968caf858SIrina Tirdea * declare gpio pins and devices that do not. It is either called 92068caf858SIrina Tirdea * directly from probe or from request_firmware_wait callback. 92168caf858SIrina Tirdea */ 92268caf858SIrina Tirdea static int goodix_configure_dev(struct goodix_ts_data *ts) 92368caf858SIrina Tirdea { 92468caf858SIrina Tirdea int error; 92568caf858SIrina Tirdea 926fafef982SMarcin Niestroj ts->int_trigger_type = GOODIX_INT_TRIGGER; 927fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 928ad48cf5eSKarsten Merker 929fafef982SMarcin Niestroj ts->input_dev = devm_input_allocate_device(&ts->client->dev); 930fafef982SMarcin Niestroj if (!ts->input_dev) { 931fafef982SMarcin Niestroj dev_err(&ts->client->dev, "Failed to allocate input device."); 932fafef982SMarcin Niestroj return -ENOMEM; 933fafef982SMarcin Niestroj } 934fafef982SMarcin Niestroj 935fafef982SMarcin Niestroj ts->input_dev->name = "Goodix Capacitive TouchScreen"; 936fafef982SMarcin Niestroj ts->input_dev->phys = "input/ts"; 937fafef982SMarcin Niestroj ts->input_dev->id.bustype = BUS_I2C; 938fafef982SMarcin Niestroj ts->input_dev->id.vendor = 0x0416; 939fafef982SMarcin Niestroj ts->input_dev->id.product = ts->id; 940fafef982SMarcin Niestroj ts->input_dev->id.version = ts->version; 941fafef982SMarcin Niestroj 942fafef982SMarcin Niestroj /* Capacitive Windows/Home button on some devices */ 943fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_KEY, KEY_LEFTMETA); 944fafef982SMarcin Niestroj 945fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X); 946fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y); 947fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 948fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 949fafef982SMarcin Niestroj 950fafef982SMarcin Niestroj /* Read configuration and apply touchscreen parameters */ 95168caf858SIrina Tirdea goodix_read_config(ts); 95268caf858SIrina Tirdea 953fafef982SMarcin Niestroj /* Try overriding touchscreen parameters via device properties */ 954fafef982SMarcin Niestroj touchscreen_parse_properties(ts->input_dev, true, &ts->prop); 955fafef982SMarcin Niestroj 956fafef982SMarcin Niestroj if (!ts->prop.max_x || !ts->prop.max_y || !ts->max_touch_num) { 957c1c00aa5SGuido Günther dev_err(&ts->client->dev, 958c1c00aa5SGuido Günther "Invalid config (%d, %d, %d), using defaults\n", 959c1c00aa5SGuido Günther ts->prop.max_x, ts->prop.max_y, ts->max_touch_num); 960fafef982SMarcin Niestroj ts->prop.max_x = GOODIX_MAX_WIDTH - 1; 961fafef982SMarcin Niestroj ts->prop.max_y = GOODIX_MAX_HEIGHT - 1; 962fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 963fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 964fafef982SMarcin Niestroj ABS_MT_POSITION_X, ts->prop.max_x); 965fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 966fafef982SMarcin Niestroj ABS_MT_POSITION_Y, ts->prop.max_y); 967fafef982SMarcin Niestroj } 968fafef982SMarcin Niestroj 969fafef982SMarcin Niestroj if (dmi_check_system(rotated_screen)) { 970fafef982SMarcin Niestroj ts->prop.invert_x = true; 971fafef982SMarcin Niestroj ts->prop.invert_y = true; 972fafef982SMarcin Niestroj dev_dbg(&ts->client->dev, 973fafef982SMarcin Niestroj "Applying '180 degrees rotated screen' quirk\n"); 974fafef982SMarcin Niestroj } 975fafef982SMarcin Niestroj 976bd3b8480SYauhen Kharuzhy if (dmi_check_system(nine_bytes_report)) { 977bd3b8480SYauhen Kharuzhy ts->contact_size = 9; 978bd3b8480SYauhen Kharuzhy 979bd3b8480SYauhen Kharuzhy dev_dbg(&ts->client->dev, 980bd3b8480SYauhen Kharuzhy "Non-standard 9-bytes report format quirk\n"); 981bd3b8480SYauhen Kharuzhy } 982bd3b8480SYauhen Kharuzhy 9831dd5ddc1SSergei A. Trusov if (dmi_check_system(inverted_x_screen)) { 9841dd5ddc1SSergei A. Trusov ts->prop.invert_x = true; 9851dd5ddc1SSergei A. Trusov dev_dbg(&ts->client->dev, 9861dd5ddc1SSergei A. Trusov "Applying 'inverted x screen' quirk\n"); 9871dd5ddc1SSergei A. Trusov } 9881dd5ddc1SSergei A. Trusov 989fafef982SMarcin Niestroj error = input_mt_init_slots(ts->input_dev, ts->max_touch_num, 990fafef982SMarcin Niestroj INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); 991fafef982SMarcin Niestroj if (error) { 992fafef982SMarcin Niestroj dev_err(&ts->client->dev, 993fafef982SMarcin Niestroj "Failed to initialize MT slots: %d", error); 99468caf858SIrina Tirdea return error; 995fafef982SMarcin Niestroj } 996fafef982SMarcin Niestroj 997fafef982SMarcin Niestroj error = input_register_device(ts->input_dev); 998fafef982SMarcin Niestroj if (error) { 999fafef982SMarcin Niestroj dev_err(&ts->client->dev, 1000fafef982SMarcin Niestroj "Failed to register input device: %d", error); 1001fafef982SMarcin Niestroj return error; 1002fafef982SMarcin Niestroj } 100368caf858SIrina Tirdea 10045ab09d6aSIrina Tirdea ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT; 10055ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 100668caf858SIrina Tirdea if (error) { 100768caf858SIrina Tirdea dev_err(&ts->client->dev, "request IRQ failed: %d\n", error); 100868caf858SIrina Tirdea return error; 100968caf858SIrina Tirdea } 101068caf858SIrina Tirdea 101168caf858SIrina Tirdea return 0; 101268caf858SIrina Tirdea } 101368caf858SIrina Tirdea 101468caf858SIrina Tirdea /** 101568caf858SIrina Tirdea * goodix_config_cb - Callback to finish device init 101668caf858SIrina Tirdea * 101768caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 101868caf858SIrina Tirdea * 101968caf858SIrina Tirdea * request_firmware_wait callback that finishes 102068caf858SIrina Tirdea * initialization of the device. 102168caf858SIrina Tirdea */ 102268caf858SIrina Tirdea static void goodix_config_cb(const struct firmware *cfg, void *ctx) 102368caf858SIrina Tirdea { 102468caf858SIrina Tirdea struct goodix_ts_data *ts = ctx; 102568caf858SIrina Tirdea int error; 102668caf858SIrina Tirdea 102768caf858SIrina Tirdea if (cfg) { 102868caf858SIrina Tirdea /* send device configuration to the firmware */ 102968caf858SIrina Tirdea error = goodix_send_cfg(ts, cfg); 103068caf858SIrina Tirdea if (error) 103168caf858SIrina Tirdea goto err_release_cfg; 103268caf858SIrina Tirdea } 103368caf858SIrina Tirdea 103468caf858SIrina Tirdea goodix_configure_dev(ts); 103568caf858SIrina Tirdea 103668caf858SIrina Tirdea err_release_cfg: 103768caf858SIrina Tirdea release_firmware(cfg); 103868caf858SIrina Tirdea complete_all(&ts->firmware_loading_complete); 103968caf858SIrina Tirdea } 104068caf858SIrina Tirdea 1041ae97fb58SJagan Teki static void goodix_disable_regulators(void *arg) 1042ae97fb58SJagan Teki { 1043ae97fb58SJagan Teki struct goodix_ts_data *ts = arg; 1044ae97fb58SJagan Teki 1045ae97fb58SJagan Teki regulator_disable(ts->vddio); 1046ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1047ae97fb58SJagan Teki } 1048ae97fb58SJagan Teki 1049ca96ea86SBastien Nocera static int goodix_ts_probe(struct i2c_client *client, 1050ca96ea86SBastien Nocera const struct i2c_device_id *id) 1051ca96ea86SBastien Nocera { 1052ca96ea86SBastien Nocera struct goodix_ts_data *ts; 1053ca96ea86SBastien Nocera int error; 1054ca96ea86SBastien Nocera 1055ca96ea86SBastien Nocera dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr); 1056ca96ea86SBastien Nocera 1057ca96ea86SBastien Nocera if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 1058ca96ea86SBastien Nocera dev_err(&client->dev, "I2C check functionality failed.\n"); 1059ca96ea86SBastien Nocera return -ENXIO; 1060ca96ea86SBastien Nocera } 1061ca96ea86SBastien Nocera 1062ca96ea86SBastien Nocera ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); 1063ca96ea86SBastien Nocera if (!ts) 1064ca96ea86SBastien Nocera return -ENOMEM; 1065ca96ea86SBastien Nocera 1066ca96ea86SBastien Nocera ts->client = client; 1067ca96ea86SBastien Nocera i2c_set_clientdata(client, ts); 106868caf858SIrina Tirdea init_completion(&ts->firmware_loading_complete); 1069bd3b8480SYauhen Kharuzhy ts->contact_size = GOODIX_CONTACT_SIZE; 1070ca96ea86SBastien Nocera 1071ec6e1b40SIrina Tirdea error = goodix_get_gpio_config(ts); 1072ec6e1b40SIrina Tirdea if (error) 1073ec6e1b40SIrina Tirdea return error; 1074ec6e1b40SIrina Tirdea 1075ae97fb58SJagan Teki /* power up the controller */ 1076ae97fb58SJagan Teki error = regulator_enable(ts->avdd28); 1077ae97fb58SJagan Teki if (error) { 1078ae97fb58SJagan Teki dev_err(&client->dev, 1079ae97fb58SJagan Teki "Failed to enable AVDD28 regulator: %d\n", 1080ae97fb58SJagan Teki error); 1081ae97fb58SJagan Teki return error; 1082ae97fb58SJagan Teki } 1083ae97fb58SJagan Teki 1084ae97fb58SJagan Teki error = regulator_enable(ts->vddio); 1085ae97fb58SJagan Teki if (error) { 1086ae97fb58SJagan Teki dev_err(&client->dev, 1087ae97fb58SJagan Teki "Failed to enable VDDIO regulator: %d\n", 1088ae97fb58SJagan Teki error); 1089ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1090ae97fb58SJagan Teki return error; 1091ae97fb58SJagan Teki } 1092ae97fb58SJagan Teki 1093ae97fb58SJagan Teki error = devm_add_action_or_reset(&client->dev, 1094ae97fb58SJagan Teki goodix_disable_regulators, ts); 1095ae97fb58SJagan Teki if (error) 1096ae97fb58SJagan Teki return error; 1097ae97fb58SJagan Teki 10981921daceSHans de Goede if (ts->reset_controller_at_probe) { 1099ec6e1b40SIrina Tirdea /* reset the controller */ 1100ec6e1b40SIrina Tirdea error = goodix_reset(ts); 1101ec6e1b40SIrina Tirdea if (error) { 1102ec6e1b40SIrina Tirdea dev_err(&client->dev, "Controller reset failed.\n"); 1103ec6e1b40SIrina Tirdea return error; 1104ec6e1b40SIrina Tirdea } 1105ec6e1b40SIrina Tirdea } 1106ec6e1b40SIrina Tirdea 1107ca96ea86SBastien Nocera error = goodix_i2c_test(client); 1108ca96ea86SBastien Nocera if (error) { 1109ca96ea86SBastien Nocera dev_err(&client->dev, "I2C communication failure: %d\n", error); 1110ca96ea86SBastien Nocera return error; 1111ca96ea86SBastien Nocera } 1112ca96ea86SBastien Nocera 111368caf858SIrina Tirdea error = goodix_read_version(ts); 1114ca96ea86SBastien Nocera if (error) { 1115ca96ea86SBastien Nocera dev_err(&client->dev, "Read version failed.\n"); 1116ca96ea86SBastien Nocera return error; 1117ca96ea86SBastien Nocera } 1118ca96ea86SBastien Nocera 111925309004SMarcin Niestroj ts->chip = goodix_get_chip_data(ts->id); 1120a779fbc6SIrina Tirdea 1121e070a97bSHans de Goede if (ts->load_cfg_from_disk) { 112268caf858SIrina Tirdea /* update device config */ 112368caf858SIrina Tirdea ts->cfg_name = devm_kasprintf(&client->dev, GFP_KERNEL, 112468caf858SIrina Tirdea "goodix_%d_cfg.bin", ts->id); 112568caf858SIrina Tirdea if (!ts->cfg_name) 112668caf858SIrina Tirdea return -ENOMEM; 1127ca96ea86SBastien Nocera 112868caf858SIrina Tirdea error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name, 112968caf858SIrina Tirdea &client->dev, GFP_KERNEL, ts, 113068caf858SIrina Tirdea goodix_config_cb); 1131ca96ea86SBastien Nocera if (error) { 113268caf858SIrina Tirdea dev_err(&client->dev, 113368caf858SIrina Tirdea "Failed to invoke firmware loader: %d\n", 113468caf858SIrina Tirdea error); 1135ca96ea86SBastien Nocera return error; 1136ca96ea86SBastien Nocera } 1137ca96ea86SBastien Nocera 1138ca96ea86SBastien Nocera return 0; 113968caf858SIrina Tirdea } else { 114068caf858SIrina Tirdea error = goodix_configure_dev(ts); 114168caf858SIrina Tirdea if (error) 114268caf858SIrina Tirdea return error; 114368caf858SIrina Tirdea } 114468caf858SIrina Tirdea 114568caf858SIrina Tirdea return 0; 114668caf858SIrina Tirdea } 114768caf858SIrina Tirdea 114868caf858SIrina Tirdea static int goodix_ts_remove(struct i2c_client *client) 114968caf858SIrina Tirdea { 115068caf858SIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 115168caf858SIrina Tirdea 1152e070a97bSHans de Goede if (ts->load_cfg_from_disk) 115368caf858SIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 115468caf858SIrina Tirdea 115568caf858SIrina Tirdea return 0; 1156ca96ea86SBastien Nocera } 1157ca96ea86SBastien Nocera 11585ab09d6aSIrina Tirdea static int __maybe_unused goodix_suspend(struct device *dev) 11595ab09d6aSIrina Tirdea { 11605ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 11615ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 11625ab09d6aSIrina Tirdea int error; 11635ab09d6aSIrina Tirdea 1164e070a97bSHans de Goede if (ts->load_cfg_from_disk) 1165e070a97bSHans de Goede wait_for_completion(&ts->firmware_loading_complete); 1166e070a97bSHans de Goede 11675ab09d6aSIrina Tirdea /* We need gpio pins to suspend/resume */ 116849db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1169faec44b6SHans de Goede disable_irq(client->irq); 11705ab09d6aSIrina Tirdea return 0; 1171faec44b6SHans de Goede } 11725ab09d6aSIrina Tirdea 11735ab09d6aSIrina Tirdea /* Free IRQ as IRQ pin is used as output in the suspend sequence */ 11745ab09d6aSIrina Tirdea goodix_free_irq(ts); 11755ab09d6aSIrina Tirdea 11765ab09d6aSIrina Tirdea /* Output LOW on the INT pin for 5 ms */ 117749db3997SHans de Goede error = goodix_irq_direction_output(ts, 0); 11785ab09d6aSIrina Tirdea if (error) { 11795ab09d6aSIrina Tirdea goodix_request_irq(ts); 11805ab09d6aSIrina Tirdea return error; 11815ab09d6aSIrina Tirdea } 11825ab09d6aSIrina Tirdea 11835ab09d6aSIrina Tirdea usleep_range(5000, 6000); 11845ab09d6aSIrina Tirdea 11855ab09d6aSIrina Tirdea error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND, 11865ab09d6aSIrina Tirdea GOODIX_CMD_SCREEN_OFF); 11875ab09d6aSIrina Tirdea if (error) { 11885ab09d6aSIrina Tirdea dev_err(&ts->client->dev, "Screen off command failed\n"); 118949db3997SHans de Goede goodix_irq_direction_input(ts); 11905ab09d6aSIrina Tirdea goodix_request_irq(ts); 11915ab09d6aSIrina Tirdea return -EAGAIN; 11925ab09d6aSIrina Tirdea } 11935ab09d6aSIrina Tirdea 11945ab09d6aSIrina Tirdea /* 11955ab09d6aSIrina Tirdea * The datasheet specifies that the interval between sending screen-off 11965ab09d6aSIrina Tirdea * command and wake-up should be longer than 58 ms. To avoid waking up 11975ab09d6aSIrina Tirdea * sooner, delay 58ms here. 11985ab09d6aSIrina Tirdea */ 11995ab09d6aSIrina Tirdea msleep(58); 12005ab09d6aSIrina Tirdea return 0; 12015ab09d6aSIrina Tirdea } 12025ab09d6aSIrina Tirdea 12035ab09d6aSIrina Tirdea static int __maybe_unused goodix_resume(struct device *dev) 12045ab09d6aSIrina Tirdea { 12055ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 12065ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 12075ab09d6aSIrina Tirdea int error; 12085ab09d6aSIrina Tirdea 120949db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1210faec44b6SHans de Goede enable_irq(client->irq); 12115ab09d6aSIrina Tirdea return 0; 1212faec44b6SHans de Goede } 12135ab09d6aSIrina Tirdea 12145ab09d6aSIrina Tirdea /* 12155ab09d6aSIrina Tirdea * Exit sleep mode by outputting HIGH level to INT pin 12165ab09d6aSIrina Tirdea * for 2ms~5ms. 12175ab09d6aSIrina Tirdea */ 121849db3997SHans de Goede error = goodix_irq_direction_output(ts, 1); 12195ab09d6aSIrina Tirdea if (error) 12205ab09d6aSIrina Tirdea return error; 12215ab09d6aSIrina Tirdea 12225ab09d6aSIrina Tirdea usleep_range(2000, 5000); 12235ab09d6aSIrina Tirdea 12245ab09d6aSIrina Tirdea error = goodix_int_sync(ts); 12255ab09d6aSIrina Tirdea if (error) 12265ab09d6aSIrina Tirdea return error; 12275ab09d6aSIrina Tirdea 12285ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 12295ab09d6aSIrina Tirdea if (error) 12305ab09d6aSIrina Tirdea return error; 12315ab09d6aSIrina Tirdea 12325ab09d6aSIrina Tirdea return 0; 12335ab09d6aSIrina Tirdea } 12345ab09d6aSIrina Tirdea 12355ab09d6aSIrina Tirdea static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume); 12365ab09d6aSIrina Tirdea 1237ca96ea86SBastien Nocera static const struct i2c_device_id goodix_ts_id[] = { 1238ca96ea86SBastien Nocera { "GDIX1001:00", 0 }, 1239ca96ea86SBastien Nocera { } 1240ca96ea86SBastien Nocera }; 12412e9e910eSJavier Martinez Canillas MODULE_DEVICE_TABLE(i2c, goodix_ts_id); 1242ca96ea86SBastien Nocera 1243771d8f1bSAleksei Mamlin #ifdef CONFIG_ACPI 1244ca96ea86SBastien Nocera static const struct acpi_device_id goodix_acpi_match[] = { 1245ca96ea86SBastien Nocera { "GDIX1001", 0 }, 12465ca4d1aeSEthan Lee { "GDIX1002", 0 }, 1247ca96ea86SBastien Nocera { } 1248ca96ea86SBastien Nocera }; 1249ca96ea86SBastien Nocera MODULE_DEVICE_TABLE(acpi, goodix_acpi_match); 1250771d8f1bSAleksei Mamlin #endif 1251771d8f1bSAleksei Mamlin 1252771d8f1bSAleksei Mamlin #ifdef CONFIG_OF 1253771d8f1bSAleksei Mamlin static const struct of_device_id goodix_of_match[] = { 125425309004SMarcin Niestroj { .compatible = "goodix,gt1151" }, 1255a5f50c50SJagan Teki { .compatible = "goodix,gt5663" }, 125684ef1b33SGuido Günther { .compatible = "goodix,gt5688" }, 1257771d8f1bSAleksei Mamlin { .compatible = "goodix,gt911" }, 1258771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9110" }, 1259771d8f1bSAleksei Mamlin { .compatible = "goodix,gt912" }, 1260771d8f1bSAleksei Mamlin { .compatible = "goodix,gt927" }, 1261771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9271" }, 1262771d8f1bSAleksei Mamlin { .compatible = "goodix,gt928" }, 1263771d8f1bSAleksei Mamlin { .compatible = "goodix,gt967" }, 1264771d8f1bSAleksei Mamlin { } 1265771d8f1bSAleksei Mamlin }; 1266771d8f1bSAleksei Mamlin MODULE_DEVICE_TABLE(of, goodix_of_match); 1267771d8f1bSAleksei Mamlin #endif 1268ca96ea86SBastien Nocera 1269ca96ea86SBastien Nocera static struct i2c_driver goodix_ts_driver = { 1270ca96ea86SBastien Nocera .probe = goodix_ts_probe, 127168caf858SIrina Tirdea .remove = goodix_ts_remove, 1272ca96ea86SBastien Nocera .id_table = goodix_ts_id, 1273ca96ea86SBastien Nocera .driver = { 1274ca96ea86SBastien Nocera .name = "Goodix-TS", 1275771d8f1bSAleksei Mamlin .acpi_match_table = ACPI_PTR(goodix_acpi_match), 1276771d8f1bSAleksei Mamlin .of_match_table = of_match_ptr(goodix_of_match), 12775ab09d6aSIrina Tirdea .pm = &goodix_pm_ops, 1278ca96ea86SBastien Nocera }, 1279ca96ea86SBastien Nocera }; 1280ca96ea86SBastien Nocera module_i2c_driver(goodix_ts_driver); 1281ca96ea86SBastien Nocera 1282ca96ea86SBastien Nocera MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); 1283ca96ea86SBastien Nocera MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>"); 1284ca96ea86SBastien Nocera MODULE_DESCRIPTION("Goodix touchscreen driver"); 1285ca96ea86SBastien Nocera MODULE_LICENSE("GPL v2"); 1286