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 32aebfc52cSHans de Goede #define GOODIX_GPIO_INT_NAME "irq" 33aebfc52cSHans de Goede #define GOODIX_GPIO_RST_NAME "reset" 34aebfc52cSHans de Goede 35aebfc52cSHans de Goede #define GOODIX_MAX_HEIGHT 4096 36aebfc52cSHans de Goede #define GOODIX_MAX_WIDTH 4096 37aebfc52cSHans de Goede #define GOODIX_INT_TRIGGER 1 38aebfc52cSHans de Goede #define GOODIX_CONTACT_SIZE 8 39aebfc52cSHans de Goede #define GOODIX_MAX_CONTACT_SIZE 9 40aebfc52cSHans de Goede #define GOODIX_MAX_CONTACTS 10 41aebfc52cSHans de Goede 42aebfc52cSHans de Goede #define GOODIX_CONFIG_MAX_LENGTH 240 43aebfc52cSHans de Goede #define GOODIX_CONFIG_911_LENGTH 186 44aebfc52cSHans de Goede #define GOODIX_CONFIG_967_LENGTH 228 45aebfc52cSHans de Goede 46aebfc52cSHans de Goede /* Register defines */ 47aebfc52cSHans de Goede #define GOODIX_REG_COMMAND 0x8040 48aebfc52cSHans de Goede #define GOODIX_CMD_SCREEN_OFF 0x05 49aebfc52cSHans de Goede 50aebfc52cSHans de Goede #define GOODIX_READ_COOR_ADDR 0x814E 51aebfc52cSHans de Goede #define GOODIX_GT1X_REG_CONFIG_DATA 0x8050 52aebfc52cSHans de Goede #define GOODIX_GT9X_REG_CONFIG_DATA 0x8047 53aebfc52cSHans de Goede #define GOODIX_REG_ID 0x8140 54aebfc52cSHans de Goede 55aebfc52cSHans de Goede #define GOODIX_BUFFER_STATUS_READY BIT(7) 56aebfc52cSHans de Goede #define GOODIX_BUFFER_STATUS_TIMEOUT 20 57aebfc52cSHans de Goede 58aebfc52cSHans de Goede #define RESOLUTION_LOC 1 59aebfc52cSHans de Goede #define MAX_CONTACTS_LOC 5 60aebfc52cSHans de Goede #define TRIGGER_LOC 6 61aebfc52cSHans de Goede 6225309004SMarcin Niestroj struct goodix_ts_data; 6325309004SMarcin Niestroj 6449db3997SHans de Goede enum goodix_irq_pin_access_method { 6549db3997SHans de Goede IRQ_PIN_ACCESS_NONE, 6649db3997SHans de Goede IRQ_PIN_ACCESS_GPIO, 67a7d4b171SHans de Goede IRQ_PIN_ACCESS_ACPI_GPIO, 68c5fca485SHans de Goede IRQ_PIN_ACCESS_ACPI_METHOD, 6949db3997SHans de Goede }; 7049db3997SHans de Goede 7125309004SMarcin Niestroj struct goodix_chip_data { 7225309004SMarcin Niestroj u16 config_addr; 7325309004SMarcin Niestroj int config_len; 7425309004SMarcin Niestroj int (*check_config)(struct goodix_ts_data *, const struct firmware *); 7525309004SMarcin Niestroj }; 7625309004SMarcin Niestroj 77ca96ea86SBastien Nocera struct goodix_ts_data { 78ca96ea86SBastien Nocera struct i2c_client *client; 79ca96ea86SBastien Nocera struct input_dev *input_dev; 8025309004SMarcin Niestroj const struct goodix_chip_data *chip; 81fafef982SMarcin Niestroj struct touchscreen_properties prop; 82ca96ea86SBastien Nocera unsigned int max_touch_num; 83ca96ea86SBastien Nocera unsigned int int_trigger_type; 84ae97fb58SJagan Teki struct regulator *avdd28; 85ae97fb58SJagan Teki struct regulator *vddio; 86ec6e1b40SIrina Tirdea struct gpio_desc *gpiod_int; 87ec6e1b40SIrina Tirdea struct gpio_desc *gpiod_rst; 88a7d4b171SHans de Goede int gpio_count; 89a7d4b171SHans de Goede int gpio_int_idx; 9068caf858SIrina Tirdea u16 id; 9168caf858SIrina Tirdea u16 version; 9268caf858SIrina Tirdea const char *cfg_name; 931921daceSHans de Goede bool reset_controller_at_probe; 94e070a97bSHans de Goede bool load_cfg_from_disk; 9568caf858SIrina Tirdea struct completion firmware_loading_complete; 965ab09d6aSIrina Tirdea unsigned long irq_flags; 9749db3997SHans de Goede enum goodix_irq_pin_access_method irq_pin_access_method; 98bd3b8480SYauhen Kharuzhy unsigned int contact_size; 99ca96ea86SBastien Nocera }; 100ca96ea86SBastien Nocera 10125309004SMarcin Niestroj static int goodix_check_cfg_8(struct goodix_ts_data *ts, 10225309004SMarcin Niestroj const struct firmware *cfg); 10325309004SMarcin Niestroj static int goodix_check_cfg_16(struct goodix_ts_data *ts, 10425309004SMarcin Niestroj const struct firmware *cfg); 10525309004SMarcin Niestroj 10625309004SMarcin Niestroj static const struct goodix_chip_data gt1x_chip_data = { 10725309004SMarcin Niestroj .config_addr = GOODIX_GT1X_REG_CONFIG_DATA, 10825309004SMarcin Niestroj .config_len = GOODIX_CONFIG_MAX_LENGTH, 10925309004SMarcin Niestroj .check_config = goodix_check_cfg_16, 11025309004SMarcin Niestroj }; 11125309004SMarcin Niestroj 11225309004SMarcin Niestroj static const struct goodix_chip_data gt911_chip_data = { 11325309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 11425309004SMarcin Niestroj .config_len = GOODIX_CONFIG_911_LENGTH, 11525309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 11625309004SMarcin Niestroj }; 11725309004SMarcin Niestroj 11825309004SMarcin Niestroj static const struct goodix_chip_data gt967_chip_data = { 11925309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 12025309004SMarcin Niestroj .config_len = GOODIX_CONFIG_967_LENGTH, 12125309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 12225309004SMarcin Niestroj }; 12325309004SMarcin Niestroj 12425309004SMarcin Niestroj static const struct goodix_chip_data gt9x_chip_data = { 12525309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 12625309004SMarcin Niestroj .config_len = GOODIX_CONFIG_MAX_LENGTH, 12725309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 12825309004SMarcin Niestroj }; 12925309004SMarcin Niestroj 130ca96ea86SBastien Nocera static const unsigned long goodix_irq_flags[] = { 131ca96ea86SBastien Nocera IRQ_TYPE_EDGE_RISING, 132ca96ea86SBastien Nocera IRQ_TYPE_EDGE_FALLING, 133ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_LOW, 134ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_HIGH, 135ca96ea86SBastien Nocera }; 136ca96ea86SBastien Nocera 1378b5a359cSBastien Nocera /* 1388b5a359cSBastien Nocera * Those tablets have their coordinates origin at the bottom right 1398b5a359cSBastien Nocera * of the tablet, as if rotated 180 degrees 1408b5a359cSBastien Nocera */ 1418b5a359cSBastien Nocera static const struct dmi_system_id rotated_screen[] = { 1428b5a359cSBastien Nocera #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1438b5a359cSBastien Nocera { 144df5b5e55SHans de Goede .ident = "Teclast X89", 145df5b5e55SHans de Goede .matches = { 146df5b5e55SHans de Goede /* tPAD is too generic, also match on bios date */ 147df5b5e55SHans de Goede DMI_MATCH(DMI_BOARD_VENDOR, "TECLAST"), 148df5b5e55SHans de Goede DMI_MATCH(DMI_BOARD_NAME, "tPAD"), 149df5b5e55SHans de Goede DMI_MATCH(DMI_BIOS_DATE, "12/19/2014"), 150df5b5e55SHans de Goede }, 151df5b5e55SHans de Goede }, 152df5b5e55SHans de Goede { 1538b5a359cSBastien Nocera .ident = "WinBook TW100", 1548b5a359cSBastien Nocera .matches = { 1558b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 1568b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW100") 1578b5a359cSBastien Nocera } 1588b5a359cSBastien Nocera }, 1598b5a359cSBastien Nocera { 1608b5a359cSBastien Nocera .ident = "WinBook TW700", 1618b5a359cSBastien Nocera .matches = { 1628b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 1638b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW700") 1648b5a359cSBastien Nocera }, 1658b5a359cSBastien Nocera }, 1668b5a359cSBastien Nocera #endif 1678b5a359cSBastien Nocera {} 1688b5a359cSBastien Nocera }; 1698b5a359cSBastien Nocera 170bd3b8480SYauhen Kharuzhy static const struct dmi_system_id nine_bytes_report[] = { 171bd3b8480SYauhen Kharuzhy #if defined(CONFIG_DMI) && defined(CONFIG_X86) 172bd3b8480SYauhen Kharuzhy { 173bd3b8480SYauhen Kharuzhy .ident = "Lenovo YogaBook", 174bd3b8480SYauhen Kharuzhy /* YB1-X91L/F and YB1-X90L/F */ 175bd3b8480SYauhen Kharuzhy .matches = { 176bd3b8480SYauhen Kharuzhy DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X9") 177bd3b8480SYauhen Kharuzhy } 178bd3b8480SYauhen Kharuzhy }, 179bd3b8480SYauhen Kharuzhy #endif 180bd3b8480SYauhen Kharuzhy {} 181bd3b8480SYauhen Kharuzhy }; 182bd3b8480SYauhen Kharuzhy 1831dd5ddc1SSergei A. Trusov /* 1841dd5ddc1SSergei A. Trusov * Those tablets have their x coordinate inverted 1851dd5ddc1SSergei A. Trusov */ 1861dd5ddc1SSergei A. Trusov static const struct dmi_system_id inverted_x_screen[] = { 1871dd5ddc1SSergei A. Trusov #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1881dd5ddc1SSergei A. Trusov { 1891dd5ddc1SSergei A. Trusov .ident = "Cube I15-TC", 1901dd5ddc1SSergei A. Trusov .matches = { 1911dd5ddc1SSergei A. Trusov DMI_MATCH(DMI_SYS_VENDOR, "Cube"), 1921dd5ddc1SSergei A. Trusov DMI_MATCH(DMI_PRODUCT_NAME, "I15-TC") 1931dd5ddc1SSergei A. Trusov }, 1941dd5ddc1SSergei A. Trusov }, 1951dd5ddc1SSergei A. Trusov #endif 1961dd5ddc1SSergei A. Trusov {} 1971dd5ddc1SSergei A. Trusov }; 1981dd5ddc1SSergei A. Trusov 199ca96ea86SBastien Nocera /** 200ca96ea86SBastien Nocera * goodix_i2c_read - read data from a register of the i2c slave device. 201ca96ea86SBastien Nocera * 202ca96ea86SBastien Nocera * @client: i2c device. 203ca96ea86SBastien Nocera * @reg: the register to read from. 204ca96ea86SBastien Nocera * @buf: raw write data buffer. 205ca96ea86SBastien Nocera * @len: length of the buffer to write 206ca96ea86SBastien Nocera */ 207ca96ea86SBastien Nocera static int goodix_i2c_read(struct i2c_client *client, 208ca96ea86SBastien Nocera u16 reg, u8 *buf, int len) 209ca96ea86SBastien Nocera { 210ca96ea86SBastien Nocera struct i2c_msg msgs[2]; 211fafef982SMarcin Niestroj __be16 wbuf = cpu_to_be16(reg); 212ca96ea86SBastien Nocera int ret; 213ca96ea86SBastien Nocera 214ca96ea86SBastien Nocera msgs[0].flags = 0; 215ca96ea86SBastien Nocera msgs[0].addr = client->addr; 216ca96ea86SBastien Nocera msgs[0].len = 2; 217ca96ea86SBastien Nocera msgs[0].buf = (u8 *)&wbuf; 218ca96ea86SBastien Nocera 219ca96ea86SBastien Nocera msgs[1].flags = I2C_M_RD; 220ca96ea86SBastien Nocera msgs[1].addr = client->addr; 221ca96ea86SBastien Nocera msgs[1].len = len; 222ca96ea86SBastien Nocera msgs[1].buf = buf; 223ca96ea86SBastien Nocera 224ca96ea86SBastien Nocera ret = i2c_transfer(client->adapter, msgs, 2); 225ca96ea86SBastien Nocera return ret < 0 ? ret : (ret != ARRAY_SIZE(msgs) ? -EIO : 0); 226ca96ea86SBastien Nocera } 227ca96ea86SBastien Nocera 22868caf858SIrina Tirdea /** 22968caf858SIrina Tirdea * goodix_i2c_write - write data to a register of the i2c slave device. 23068caf858SIrina Tirdea * 23168caf858SIrina Tirdea * @client: i2c device. 23268caf858SIrina Tirdea * @reg: the register to write to. 23368caf858SIrina Tirdea * @buf: raw data buffer to write. 23468caf858SIrina Tirdea * @len: length of the buffer to write 23568caf858SIrina Tirdea */ 23668caf858SIrina Tirdea static int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf, 23768caf858SIrina Tirdea unsigned len) 23868caf858SIrina Tirdea { 23968caf858SIrina Tirdea u8 *addr_buf; 24068caf858SIrina Tirdea struct i2c_msg msg; 24168caf858SIrina Tirdea int ret; 24268caf858SIrina Tirdea 24368caf858SIrina Tirdea addr_buf = kmalloc(len + 2, GFP_KERNEL); 24468caf858SIrina Tirdea if (!addr_buf) 24568caf858SIrina Tirdea return -ENOMEM; 24668caf858SIrina Tirdea 24768caf858SIrina Tirdea addr_buf[0] = reg >> 8; 24868caf858SIrina Tirdea addr_buf[1] = reg & 0xFF; 24968caf858SIrina Tirdea memcpy(&addr_buf[2], buf, len); 25068caf858SIrina Tirdea 25168caf858SIrina Tirdea msg.flags = 0; 25268caf858SIrina Tirdea msg.addr = client->addr; 25368caf858SIrina Tirdea msg.buf = addr_buf; 25468caf858SIrina Tirdea msg.len = len + 2; 25568caf858SIrina Tirdea 25668caf858SIrina Tirdea ret = i2c_transfer(client->adapter, &msg, 1); 25768caf858SIrina Tirdea kfree(addr_buf); 25868caf858SIrina Tirdea return ret < 0 ? ret : (ret != 1 ? -EIO : 0); 25968caf858SIrina Tirdea } 26068caf858SIrina Tirdea 2615ab09d6aSIrina Tirdea static int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value) 2625ab09d6aSIrina Tirdea { 2635ab09d6aSIrina Tirdea return goodix_i2c_write(client, reg, &value, sizeof(value)); 2645ab09d6aSIrina Tirdea } 2655ab09d6aSIrina Tirdea 26625309004SMarcin Niestroj static const struct goodix_chip_data *goodix_get_chip_data(u16 id) 267a779fbc6SIrina Tirdea { 268a779fbc6SIrina Tirdea switch (id) { 26925309004SMarcin Niestroj case 1151: 270a5f50c50SJagan Teki case 5663: 27184ef1b33SGuido Günther case 5688: 27225309004SMarcin Niestroj return >1x_chip_data; 27325309004SMarcin Niestroj 274a779fbc6SIrina Tirdea case 911: 275a779fbc6SIrina Tirdea case 9271: 276a779fbc6SIrina Tirdea case 9110: 277a779fbc6SIrina Tirdea case 927: 278a779fbc6SIrina Tirdea case 928: 27925309004SMarcin Niestroj return >911_chip_data; 280a779fbc6SIrina Tirdea 281a779fbc6SIrina Tirdea case 912: 282a779fbc6SIrina Tirdea case 967: 28325309004SMarcin Niestroj return >967_chip_data; 284a779fbc6SIrina Tirdea 285a779fbc6SIrina Tirdea default: 28625309004SMarcin Niestroj return >9x_chip_data; 287a779fbc6SIrina Tirdea } 288a779fbc6SIrina Tirdea } 289a779fbc6SIrina Tirdea 290ca96ea86SBastien Nocera static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data) 291ca96ea86SBastien Nocera { 2929b5db7aaSPaul Cercueil unsigned long max_timeout; 293ca96ea86SBastien Nocera int touch_num; 294ca96ea86SBastien Nocera int error; 295ca96ea86SBastien Nocera 2969b5db7aaSPaul Cercueil /* 2979b5db7aaSPaul Cercueil * The 'buffer status' bit, which indicates that the data is valid, is 2989b5db7aaSPaul Cercueil * not set as soon as the interrupt is raised, but slightly after. 2999b5db7aaSPaul Cercueil * This takes around 10 ms to happen, so we poll for 20 ms. 3009b5db7aaSPaul Cercueil */ 3019b5db7aaSPaul Cercueil max_timeout = jiffies + msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT); 3029b5db7aaSPaul Cercueil do { 3039b5db7aaSPaul Cercueil error = goodix_i2c_read(ts->client, GOODIX_READ_COOR_ADDR, 304bd3b8480SYauhen Kharuzhy data, ts->contact_size + 1); 305ca96ea86SBastien Nocera if (error) { 3069b5db7aaSPaul Cercueil dev_err(&ts->client->dev, "I2C transfer error: %d\n", 3079b5db7aaSPaul Cercueil error); 308ca96ea86SBastien Nocera return error; 309ca96ea86SBastien Nocera } 310ca96ea86SBastien Nocera 3119b5db7aaSPaul Cercueil if (data[0] & GOODIX_BUFFER_STATUS_READY) { 312ca96ea86SBastien Nocera touch_num = data[0] & 0x0f; 313a7ac7c95SAleksei Mamlin if (touch_num > ts->max_touch_num) 314ca96ea86SBastien Nocera return -EPROTO; 315ca96ea86SBastien Nocera 316ca96ea86SBastien Nocera if (touch_num > 1) { 317bd3b8480SYauhen Kharuzhy data += 1 + ts->contact_size; 318ca96ea86SBastien Nocera error = goodix_i2c_read(ts->client, 319ca96ea86SBastien Nocera GOODIX_READ_COOR_ADDR + 320bd3b8480SYauhen Kharuzhy 1 + ts->contact_size, 321ca96ea86SBastien Nocera data, 322bd3b8480SYauhen Kharuzhy ts->contact_size * 3239b5db7aaSPaul Cercueil (touch_num - 1)); 324ca96ea86SBastien Nocera if (error) 325ca96ea86SBastien Nocera return error; 326ca96ea86SBastien Nocera } 327ca96ea86SBastien Nocera 328ca96ea86SBastien Nocera return touch_num; 329ca96ea86SBastien Nocera } 330ca96ea86SBastien Nocera 3319b5db7aaSPaul Cercueil usleep_range(1000, 2000); /* Poll every 1 - 2 ms */ 3329b5db7aaSPaul Cercueil } while (time_before(jiffies, max_timeout)); 3339b5db7aaSPaul Cercueil 3349b5db7aaSPaul Cercueil /* 3359b5db7aaSPaul Cercueil * The Goodix panel will send spurious interrupts after a 3369b5db7aaSPaul Cercueil * 'finger up' event, which will always cause a timeout. 3379b5db7aaSPaul Cercueil */ 3389b5db7aaSPaul Cercueil return 0; 3399b5db7aaSPaul Cercueil } 3409b5db7aaSPaul Cercueil 341bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_8b(struct goodix_ts_data *ts, u8 *coor_data) 342ca96ea86SBastien Nocera { 343ca96ea86SBastien Nocera int id = coor_data[0] & 0x0F; 344ca96ea86SBastien Nocera int input_x = get_unaligned_le16(&coor_data[1]); 345ca96ea86SBastien Nocera int input_y = get_unaligned_le16(&coor_data[3]); 346ca96ea86SBastien Nocera int input_w = get_unaligned_le16(&coor_data[5]); 347ca96ea86SBastien Nocera 348ca96ea86SBastien Nocera input_mt_slot(ts->input_dev, id); 349ca96ea86SBastien Nocera input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 350fafef982SMarcin Niestroj touchscreen_report_pos(ts->input_dev, &ts->prop, 351fafef982SMarcin Niestroj input_x, input_y, true); 352ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 353ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 354ca96ea86SBastien Nocera } 355ca96ea86SBastien Nocera 356bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_9b(struct goodix_ts_data *ts, u8 *coor_data) 357bd3b8480SYauhen Kharuzhy { 358bd3b8480SYauhen Kharuzhy int id = coor_data[1] & 0x0F; 359bd3b8480SYauhen Kharuzhy int input_x = get_unaligned_le16(&coor_data[3]); 360bd3b8480SYauhen Kharuzhy int input_y = get_unaligned_le16(&coor_data[5]); 361bd3b8480SYauhen Kharuzhy int input_w = get_unaligned_le16(&coor_data[7]); 362bd3b8480SYauhen Kharuzhy 363bd3b8480SYauhen Kharuzhy input_mt_slot(ts->input_dev, id); 364bd3b8480SYauhen Kharuzhy input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 365bd3b8480SYauhen Kharuzhy touchscreen_report_pos(ts->input_dev, &ts->prop, 366bd3b8480SYauhen Kharuzhy input_x, input_y, true); 367bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 368bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 369bd3b8480SYauhen Kharuzhy } 370bd3b8480SYauhen Kharuzhy 371ca96ea86SBastien Nocera /** 372ca96ea86SBastien Nocera * goodix_process_events - Process incoming events 373ca96ea86SBastien Nocera * 374ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 375ca96ea86SBastien Nocera * 376ca96ea86SBastien Nocera * Called when the IRQ is triggered. Read the current device state, and push 377ca96ea86SBastien Nocera * the input events to the user space. 378ca96ea86SBastien Nocera */ 379ca96ea86SBastien Nocera static void goodix_process_events(struct goodix_ts_data *ts) 380ca96ea86SBastien Nocera { 381bd3b8480SYauhen Kharuzhy u8 point_data[1 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS]; 382ca96ea86SBastien Nocera int touch_num; 383ca96ea86SBastien Nocera int i; 384ca96ea86SBastien Nocera 385ca96ea86SBastien Nocera touch_num = goodix_ts_read_input_report(ts, point_data); 386ca96ea86SBastien Nocera if (touch_num < 0) 387ca96ea86SBastien Nocera return; 388ca96ea86SBastien Nocera 3894a54feeaSSergei A. Trusov /* 3904a54feeaSSergei A. Trusov * Bit 4 of the first byte reports the status of the capacitive 3914a54feeaSSergei A. Trusov * Windows/Home button. 3924a54feeaSSergei A. Trusov */ 3934a54feeaSSergei A. Trusov input_report_key(ts->input_dev, KEY_LEFTMETA, point_data[0] & BIT(4)); 3944a54feeaSSergei A. Trusov 395ca96ea86SBastien Nocera for (i = 0; i < touch_num; i++) 396bd3b8480SYauhen Kharuzhy if (ts->contact_size == 9) 397bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_9b(ts, 398bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 399bd3b8480SYauhen Kharuzhy else 400bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_8b(ts, 401bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 402ca96ea86SBastien Nocera 403ca96ea86SBastien Nocera input_mt_sync_frame(ts->input_dev); 404ca96ea86SBastien Nocera input_sync(ts->input_dev); 405ca96ea86SBastien Nocera } 406ca96ea86SBastien Nocera 407ca96ea86SBastien Nocera /** 408ca96ea86SBastien Nocera * goodix_ts_irq_handler - The IRQ handler 409ca96ea86SBastien Nocera * 410ca96ea86SBastien Nocera * @irq: interrupt number. 411ca96ea86SBastien Nocera * @dev_id: private data pointer. 412ca96ea86SBastien Nocera */ 413ca96ea86SBastien Nocera static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id) 414ca96ea86SBastien Nocera { 415ca96ea86SBastien Nocera struct goodix_ts_data *ts = dev_id; 416ca96ea86SBastien Nocera 417ca96ea86SBastien Nocera goodix_process_events(ts); 418ca96ea86SBastien Nocera 4195d655b35SIrina Tirdea if (goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0) < 0) 420ca96ea86SBastien Nocera dev_err(&ts->client->dev, "I2C write end_cmd error\n"); 421ca96ea86SBastien Nocera 422ca96ea86SBastien Nocera return IRQ_HANDLED; 423ca96ea86SBastien Nocera } 424ca96ea86SBastien Nocera 4255ab09d6aSIrina Tirdea static void goodix_free_irq(struct goodix_ts_data *ts) 4265ab09d6aSIrina Tirdea { 4275ab09d6aSIrina Tirdea devm_free_irq(&ts->client->dev, ts->client->irq, ts); 4285ab09d6aSIrina Tirdea } 4295ab09d6aSIrina Tirdea 4305ab09d6aSIrina Tirdea static int goodix_request_irq(struct goodix_ts_data *ts) 4315ab09d6aSIrina Tirdea { 4325ab09d6aSIrina Tirdea return devm_request_threaded_irq(&ts->client->dev, ts->client->irq, 4335ab09d6aSIrina Tirdea NULL, goodix_ts_irq_handler, 4345ab09d6aSIrina Tirdea ts->irq_flags, ts->client->name, ts); 4355ab09d6aSIrina Tirdea } 4365ab09d6aSIrina Tirdea 43725309004SMarcin Niestroj static int goodix_check_cfg_8(struct goodix_ts_data *ts, 43868caf858SIrina Tirdea const struct firmware *cfg) 43968caf858SIrina Tirdea { 44025309004SMarcin Niestroj int i, raw_cfg_len = cfg->size - 2; 44168caf858SIrina Tirdea u8 check_sum = 0; 44268caf858SIrina Tirdea 44368caf858SIrina Tirdea for (i = 0; i < raw_cfg_len; i++) 44468caf858SIrina Tirdea check_sum += cfg->data[i]; 44568caf858SIrina Tirdea check_sum = (~check_sum) + 1; 44668caf858SIrina Tirdea if (check_sum != cfg->data[raw_cfg_len]) { 44768caf858SIrina Tirdea dev_err(&ts->client->dev, 44868caf858SIrina Tirdea "The checksum of the config fw is not correct"); 44968caf858SIrina Tirdea return -EINVAL; 45068caf858SIrina Tirdea } 45168caf858SIrina Tirdea 45268caf858SIrina Tirdea if (cfg->data[raw_cfg_len + 1] != 1) { 45368caf858SIrina Tirdea dev_err(&ts->client->dev, 45468caf858SIrina Tirdea "Config fw must have Config_Fresh register set"); 45568caf858SIrina Tirdea return -EINVAL; 45668caf858SIrina Tirdea } 45768caf858SIrina Tirdea 45868caf858SIrina Tirdea return 0; 45968caf858SIrina Tirdea } 46068caf858SIrina Tirdea 46125309004SMarcin Niestroj static int goodix_check_cfg_16(struct goodix_ts_data *ts, 46225309004SMarcin Niestroj const struct firmware *cfg) 46325309004SMarcin Niestroj { 46425309004SMarcin Niestroj int i, raw_cfg_len = cfg->size - 3; 46525309004SMarcin Niestroj u16 check_sum = 0; 46625309004SMarcin Niestroj 46725309004SMarcin Niestroj for (i = 0; i < raw_cfg_len; i += 2) 46825309004SMarcin Niestroj check_sum += get_unaligned_be16(&cfg->data[i]); 46925309004SMarcin Niestroj check_sum = (~check_sum) + 1; 47025309004SMarcin Niestroj if (check_sum != get_unaligned_be16(&cfg->data[raw_cfg_len])) { 47125309004SMarcin Niestroj dev_err(&ts->client->dev, 47225309004SMarcin Niestroj "The checksum of the config fw is not correct"); 47325309004SMarcin Niestroj return -EINVAL; 47425309004SMarcin Niestroj } 47525309004SMarcin Niestroj 47625309004SMarcin Niestroj if (cfg->data[raw_cfg_len + 2] != 1) { 47725309004SMarcin Niestroj dev_err(&ts->client->dev, 47825309004SMarcin Niestroj "Config fw must have Config_Fresh register set"); 47925309004SMarcin Niestroj return -EINVAL; 48025309004SMarcin Niestroj } 48125309004SMarcin Niestroj 48225309004SMarcin Niestroj return 0; 48325309004SMarcin Niestroj } 48425309004SMarcin Niestroj 48525309004SMarcin Niestroj /** 48625309004SMarcin Niestroj * goodix_check_cfg - Checks if config fw is valid 48725309004SMarcin Niestroj * 48825309004SMarcin Niestroj * @ts: goodix_ts_data pointer 48925309004SMarcin Niestroj * @cfg: firmware config data 49025309004SMarcin Niestroj */ 49125309004SMarcin Niestroj static int goodix_check_cfg(struct goodix_ts_data *ts, 49225309004SMarcin Niestroj const struct firmware *cfg) 49325309004SMarcin Niestroj { 49425309004SMarcin Niestroj if (cfg->size > GOODIX_CONFIG_MAX_LENGTH) { 49525309004SMarcin Niestroj dev_err(&ts->client->dev, 49625309004SMarcin Niestroj "The length of the config fw is not correct"); 49725309004SMarcin Niestroj return -EINVAL; 49825309004SMarcin Niestroj } 49925309004SMarcin Niestroj 50025309004SMarcin Niestroj return ts->chip->check_config(ts, cfg); 50125309004SMarcin Niestroj } 50225309004SMarcin Niestroj 50368caf858SIrina Tirdea /** 50468caf858SIrina Tirdea * goodix_send_cfg - Write fw config to device 50568caf858SIrina Tirdea * 50668caf858SIrina Tirdea * @ts: goodix_ts_data pointer 50768caf858SIrina Tirdea * @cfg: config firmware to write to device 50868caf858SIrina Tirdea */ 50968caf858SIrina Tirdea static int goodix_send_cfg(struct goodix_ts_data *ts, 51068caf858SIrina Tirdea const struct firmware *cfg) 51168caf858SIrina Tirdea { 51268caf858SIrina Tirdea int error; 51368caf858SIrina Tirdea 51468caf858SIrina Tirdea error = goodix_check_cfg(ts, cfg); 51568caf858SIrina Tirdea if (error) 51668caf858SIrina Tirdea return error; 51768caf858SIrina Tirdea 51825309004SMarcin Niestroj error = goodix_i2c_write(ts->client, ts->chip->config_addr, cfg->data, 51968caf858SIrina Tirdea cfg->size); 52068caf858SIrina Tirdea if (error) { 52168caf858SIrina Tirdea dev_err(&ts->client->dev, "Failed to write config data: %d", 52268caf858SIrina Tirdea error); 52368caf858SIrina Tirdea return error; 52468caf858SIrina Tirdea } 52568caf858SIrina Tirdea dev_dbg(&ts->client->dev, "Config sent successfully."); 52668caf858SIrina Tirdea 52768caf858SIrina Tirdea /* Let the firmware reconfigure itself, so sleep for 10ms */ 52868caf858SIrina Tirdea usleep_range(10000, 11000); 52968caf858SIrina Tirdea 53068caf858SIrina Tirdea return 0; 53168caf858SIrina Tirdea } 53268caf858SIrina Tirdea 53349db3997SHans de Goede static int goodix_irq_direction_output(struct goodix_ts_data *ts, 53449db3997SHans de Goede int value) 53549db3997SHans de Goede { 536c5fca485SHans de Goede struct device *dev = &ts->client->dev; 537c5fca485SHans de Goede acpi_status status; 538c5fca485SHans de Goede 53949db3997SHans de Goede switch (ts->irq_pin_access_method) { 54049db3997SHans de Goede case IRQ_PIN_ACCESS_NONE: 54149db3997SHans de Goede dev_err(&ts->client->dev, 54249db3997SHans de Goede "%s called without an irq_pin_access_method set\n", 54349db3997SHans de Goede __func__); 54449db3997SHans de Goede return -EINVAL; 54549db3997SHans de Goede case IRQ_PIN_ACCESS_GPIO: 54649db3997SHans de Goede return gpiod_direction_output(ts->gpiod_int, value); 547a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 548a7d4b171SHans de Goede /* 549a7d4b171SHans de Goede * The IRQ pin triggers on a falling edge, so its gets marked 550a7d4b171SHans de Goede * as active-low, use output_raw to avoid the value inversion. 551a7d4b171SHans de Goede */ 552a7d4b171SHans de Goede return gpiod_direction_output_raw(ts->gpiod_int, value); 553c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 554c5fca485SHans de Goede status = acpi_execute_simple_method(ACPI_HANDLE(dev), 555c5fca485SHans de Goede "INTO", value); 556c5fca485SHans de Goede return ACPI_SUCCESS(status) ? 0 : -EIO; 55749db3997SHans de Goede } 55849db3997SHans de Goede 55949db3997SHans de Goede return -EINVAL; /* Never reached */ 56049db3997SHans de Goede } 56149db3997SHans de Goede 56249db3997SHans de Goede static int goodix_irq_direction_input(struct goodix_ts_data *ts) 56349db3997SHans de Goede { 564c5fca485SHans de Goede struct device *dev = &ts->client->dev; 565c5fca485SHans de Goede acpi_status status; 566c5fca485SHans de Goede 56749db3997SHans de Goede switch (ts->irq_pin_access_method) { 56849db3997SHans de Goede case IRQ_PIN_ACCESS_NONE: 56949db3997SHans de Goede dev_err(&ts->client->dev, 57049db3997SHans de Goede "%s called without an irq_pin_access_method set\n", 57149db3997SHans de Goede __func__); 57249db3997SHans de Goede return -EINVAL; 57349db3997SHans de Goede case IRQ_PIN_ACCESS_GPIO: 574a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 57549db3997SHans de Goede return gpiod_direction_input(ts->gpiod_int); 576c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 577c5fca485SHans de Goede status = acpi_evaluate_object(ACPI_HANDLE(dev), "INTI", 578c5fca485SHans de Goede NULL, NULL); 579c5fca485SHans de Goede return ACPI_SUCCESS(status) ? 0 : -EIO; 58049db3997SHans de Goede } 58149db3997SHans de Goede 58249db3997SHans de Goede return -EINVAL; /* Never reached */ 58349db3997SHans de Goede } 58449db3997SHans de Goede 585ec6e1b40SIrina Tirdea static int goodix_int_sync(struct goodix_ts_data *ts) 586ec6e1b40SIrina Tirdea { 587ec6e1b40SIrina Tirdea int error; 588ec6e1b40SIrina Tirdea 58949db3997SHans de Goede error = goodix_irq_direction_output(ts, 0); 590ec6e1b40SIrina Tirdea if (error) 591ec6e1b40SIrina Tirdea return error; 592ec6e1b40SIrina Tirdea 593ec6e1b40SIrina Tirdea msleep(50); /* T5: 50ms */ 594ec6e1b40SIrina Tirdea 59549db3997SHans de Goede error = goodix_irq_direction_input(ts); 596ec6e1b40SIrina Tirdea if (error) 597ec6e1b40SIrina Tirdea return error; 598ec6e1b40SIrina Tirdea 599ec6e1b40SIrina Tirdea return 0; 600ec6e1b40SIrina Tirdea } 601ec6e1b40SIrina Tirdea 602ec6e1b40SIrina Tirdea /** 603ec6e1b40SIrina Tirdea * goodix_reset - Reset device during power on 604ec6e1b40SIrina Tirdea * 605ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 606ec6e1b40SIrina Tirdea */ 607ec6e1b40SIrina Tirdea static int goodix_reset(struct goodix_ts_data *ts) 608ec6e1b40SIrina Tirdea { 609ec6e1b40SIrina Tirdea int error; 610ec6e1b40SIrina Tirdea 611ec6e1b40SIrina Tirdea /* begin select I2C slave addr */ 612ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 0); 613ec6e1b40SIrina Tirdea if (error) 614ec6e1b40SIrina Tirdea return error; 615ec6e1b40SIrina Tirdea 616ec6e1b40SIrina Tirdea msleep(20); /* T2: > 10ms */ 617ec6e1b40SIrina Tirdea 618ec6e1b40SIrina Tirdea /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */ 61949db3997SHans de Goede error = goodix_irq_direction_output(ts, ts->client->addr == 0x14); 620ec6e1b40SIrina Tirdea if (error) 621ec6e1b40SIrina Tirdea return error; 622ec6e1b40SIrina Tirdea 623ec6e1b40SIrina Tirdea usleep_range(100, 2000); /* T3: > 100us */ 624ec6e1b40SIrina Tirdea 625ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 1); 626ec6e1b40SIrina Tirdea if (error) 627ec6e1b40SIrina Tirdea return error; 628ec6e1b40SIrina Tirdea 629ec6e1b40SIrina Tirdea usleep_range(6000, 10000); /* T4: > 5ms */ 630ec6e1b40SIrina Tirdea 631ec6e1b40SIrina Tirdea /* end select I2C slave addr */ 632ec6e1b40SIrina Tirdea error = gpiod_direction_input(ts->gpiod_rst); 633ec6e1b40SIrina Tirdea if (error) 634ec6e1b40SIrina Tirdea return error; 635ec6e1b40SIrina Tirdea 636ec6e1b40SIrina Tirdea error = goodix_int_sync(ts); 637ec6e1b40SIrina Tirdea if (error) 638ec6e1b40SIrina Tirdea return error; 639ec6e1b40SIrina Tirdea 640ec6e1b40SIrina Tirdea return 0; 641ec6e1b40SIrina Tirdea } 642ec6e1b40SIrina Tirdea 643a7d4b171SHans de Goede #if defined CONFIG_X86 && defined CONFIG_ACPI 64467abd9eeSHans de Goede #include <asm/cpu_device_id.h> 64567abd9eeSHans de Goede #include <asm/intel-family.h> 64667abd9eeSHans de Goede 64767abd9eeSHans de Goede static const struct x86_cpu_id baytrail_cpu_ids[] = { 64867abd9eeSHans de Goede { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT, X86_FEATURE_ANY, }, 64967abd9eeSHans de Goede {} 65067abd9eeSHans de Goede }; 65167abd9eeSHans de Goede 65267abd9eeSHans de Goede static inline bool is_byt(void) 65367abd9eeSHans de Goede { 65467abd9eeSHans de Goede const struct x86_cpu_id *id = x86_match_cpu(baytrail_cpu_ids); 65567abd9eeSHans de Goede 65667abd9eeSHans de Goede return !!id; 65767abd9eeSHans de Goede } 65867abd9eeSHans de Goede 659a7d4b171SHans de Goede static const struct acpi_gpio_params first_gpio = { 0, 0, false }; 660a7d4b171SHans de Goede static const struct acpi_gpio_params second_gpio = { 1, 0, false }; 661a7d4b171SHans de Goede 662a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_first_gpios[] = { 663a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &first_gpio, 1 }, 664a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &second_gpio, 1 }, 665a7d4b171SHans de Goede { }, 666a7d4b171SHans de Goede }; 667a7d4b171SHans de Goede 668a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_last_gpios[] = { 669a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 670a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &second_gpio, 1 }, 671a7d4b171SHans de Goede { }, 672a7d4b171SHans de Goede }; 673a7d4b171SHans de Goede 674c5fca485SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_reset_only_gpios[] = { 675c5fca485SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 676c5fca485SHans de Goede { }, 677c5fca485SHans de Goede }; 678c5fca485SHans de Goede 679a7d4b171SHans de Goede static int goodix_resource(struct acpi_resource *ares, void *data) 680a7d4b171SHans de Goede { 681a7d4b171SHans de Goede struct goodix_ts_data *ts = data; 682a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 683a7d4b171SHans de Goede struct acpi_resource_gpio *gpio; 684a7d4b171SHans de Goede 685a7d4b171SHans de Goede switch (ares->type) { 686a7d4b171SHans de Goede case ACPI_RESOURCE_TYPE_GPIO: 687a7d4b171SHans de Goede gpio = &ares->data.gpio; 688a7d4b171SHans de Goede if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { 689a7d4b171SHans de Goede if (ts->gpio_int_idx == -1) { 690a7d4b171SHans de Goede ts->gpio_int_idx = ts->gpio_count; 691a7d4b171SHans de Goede } else { 692a7d4b171SHans de Goede dev_err(dev, "More then one GpioInt resource, ignoring ACPI GPIO resources\n"); 693a7d4b171SHans de Goede ts->gpio_int_idx = -2; 694a7d4b171SHans de Goede } 695a7d4b171SHans de Goede } 696a7d4b171SHans de Goede ts->gpio_count++; 697a7d4b171SHans de Goede break; 698a7d4b171SHans de Goede default: 699a7d4b171SHans de Goede break; 700a7d4b171SHans de Goede } 701a7d4b171SHans de Goede 702a7d4b171SHans de Goede return 0; 703a7d4b171SHans de Goede } 704a7d4b171SHans de Goede 705a7d4b171SHans de Goede /* 706a7d4b171SHans de Goede * This function gets called in case we fail to get the irq GPIO directly 707a7d4b171SHans de Goede * because the ACPI tables lack GPIO-name to APCI _CRS index mappings 708a7d4b171SHans de Goede * (no _DSD UUID daffd814-6eba-4d8c-8a91-bc9bbf4aa301 data). 709a7d4b171SHans de Goede * In that case we add our own mapping and then goodix_get_gpio_config() 710a7d4b171SHans de Goede * retries to get the GPIOs based on the added mapping. 711a7d4b171SHans de Goede */ 712a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 713a7d4b171SHans de Goede { 714a7d4b171SHans de Goede const struct acpi_gpio_mapping *gpio_mapping = NULL; 715a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 716a7d4b171SHans de Goede LIST_HEAD(resources); 717a7d4b171SHans de Goede int ret; 718a7d4b171SHans de Goede 719a7d4b171SHans de Goede ts->gpio_count = 0; 720a7d4b171SHans de Goede ts->gpio_int_idx = -1; 721a7d4b171SHans de Goede ret = acpi_dev_get_resources(ACPI_COMPANION(dev), &resources, 722a7d4b171SHans de Goede goodix_resource, ts); 723a7d4b171SHans de Goede if (ret < 0) { 724a7d4b171SHans de Goede dev_err(dev, "Error getting ACPI resources: %d\n", ret); 725a7d4b171SHans de Goede return ret; 726a7d4b171SHans de Goede } 727a7d4b171SHans de Goede 728a7d4b171SHans de Goede acpi_dev_free_resource_list(&resources); 729a7d4b171SHans de Goede 730a7d4b171SHans de Goede if (ts->gpio_count == 2 && ts->gpio_int_idx == 0) { 731a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 732a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_first_gpios; 733a7d4b171SHans de Goede } else if (ts->gpio_count == 2 && ts->gpio_int_idx == 1) { 734a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 735a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_last_gpios; 736c5fca485SHans de Goede } else if (ts->gpio_count == 1 && ts->gpio_int_idx == -1 && 737c5fca485SHans de Goede acpi_has_method(ACPI_HANDLE(dev), "INTI") && 738c5fca485SHans de Goede acpi_has_method(ACPI_HANDLE(dev), "INTO")) { 739c5fca485SHans de Goede dev_info(dev, "Using ACPI INTI and INTO methods for IRQ pin access\n"); 740c5fca485SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_METHOD; 741c5fca485SHans de Goede gpio_mapping = acpi_goodix_reset_only_gpios; 74267abd9eeSHans de Goede } else if (is_byt() && ts->gpio_count == 2 && ts->gpio_int_idx == -1) { 74367abd9eeSHans de Goede dev_info(dev, "No ACPI GpioInt resource, assuming that the GPIO order is reset, int\n"); 74467abd9eeSHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 74567abd9eeSHans de Goede gpio_mapping = acpi_goodix_int_last_gpios; 746a7d4b171SHans de Goede } else { 747a7d4b171SHans de Goede dev_warn(dev, "Unexpected ACPI resources: gpio_count %d, gpio_int_idx %d\n", 748a7d4b171SHans de Goede ts->gpio_count, ts->gpio_int_idx); 749a7d4b171SHans de Goede return -EINVAL; 750a7d4b171SHans de Goede } 751a7d4b171SHans de Goede 752a7d4b171SHans de Goede return devm_acpi_dev_add_driver_gpios(dev, gpio_mapping); 753a7d4b171SHans de Goede } 754a7d4b171SHans de Goede #else 755a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 756a7d4b171SHans de Goede { 757a7d4b171SHans de Goede return -EINVAL; 758a7d4b171SHans de Goede } 759a7d4b171SHans de Goede #endif /* CONFIG_X86 && CONFIG_ACPI */ 760a7d4b171SHans de Goede 761ec6e1b40SIrina Tirdea /** 762ec6e1b40SIrina Tirdea * goodix_get_gpio_config - Get GPIO config from ACPI/DT 763ec6e1b40SIrina Tirdea * 764ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 765ec6e1b40SIrina Tirdea */ 766ec6e1b40SIrina Tirdea static int goodix_get_gpio_config(struct goodix_ts_data *ts) 767ec6e1b40SIrina Tirdea { 768ec6e1b40SIrina Tirdea int error; 769ec6e1b40SIrina Tirdea struct device *dev; 770ec6e1b40SIrina Tirdea struct gpio_desc *gpiod; 771a7d4b171SHans de Goede bool added_acpi_mappings = false; 772ec6e1b40SIrina Tirdea 773ec6e1b40SIrina Tirdea if (!ts->client) 774ec6e1b40SIrina Tirdea return -EINVAL; 775ec6e1b40SIrina Tirdea dev = &ts->client->dev; 776ec6e1b40SIrina Tirdea 777ae97fb58SJagan Teki ts->avdd28 = devm_regulator_get(dev, "AVDD28"); 778ae97fb58SJagan Teki if (IS_ERR(ts->avdd28)) { 779ae97fb58SJagan Teki error = PTR_ERR(ts->avdd28); 780ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 781ae97fb58SJagan Teki dev_err(dev, 782ae97fb58SJagan Teki "Failed to get AVDD28 regulator: %d\n", error); 783ae97fb58SJagan Teki return error; 784ae97fb58SJagan Teki } 785ae97fb58SJagan Teki 786ae97fb58SJagan Teki ts->vddio = devm_regulator_get(dev, "VDDIO"); 787ae97fb58SJagan Teki if (IS_ERR(ts->vddio)) { 788ae97fb58SJagan Teki error = PTR_ERR(ts->vddio); 789ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 790ae97fb58SJagan Teki dev_err(dev, 791ae97fb58SJagan Teki "Failed to get VDDIO regulator: %d\n", error); 792ae97fb58SJagan Teki return error; 793ae97fb58SJagan Teki } 794ae97fb58SJagan Teki 795a7d4b171SHans de Goede retry_get_irq_gpio: 796ec6e1b40SIrina Tirdea /* Get the interrupt GPIO pin number */ 797ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN); 798ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 799ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 800ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 801ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 802ec6e1b40SIrina Tirdea GOODIX_GPIO_INT_NAME, error); 803ec6e1b40SIrina Tirdea return error; 804ec6e1b40SIrina Tirdea } 805a7d4b171SHans de Goede if (!gpiod && has_acpi_companion(dev) && !added_acpi_mappings) { 806a7d4b171SHans de Goede added_acpi_mappings = true; 807a7d4b171SHans de Goede if (goodix_add_acpi_gpio_mappings(ts) == 0) 808a7d4b171SHans de Goede goto retry_get_irq_gpio; 809a7d4b171SHans de Goede } 810ec6e1b40SIrina Tirdea 811ec6e1b40SIrina Tirdea ts->gpiod_int = gpiod; 812ec6e1b40SIrina Tirdea 813ec6e1b40SIrina Tirdea /* Get the reset line GPIO pin number */ 814ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, GPIOD_IN); 815ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 816ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 817ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 818ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 819ec6e1b40SIrina Tirdea GOODIX_GPIO_RST_NAME, error); 820ec6e1b40SIrina Tirdea return error; 821ec6e1b40SIrina Tirdea } 822ec6e1b40SIrina Tirdea 823ec6e1b40SIrina Tirdea ts->gpiod_rst = gpiod; 824ec6e1b40SIrina Tirdea 825a7d4b171SHans de Goede switch (ts->irq_pin_access_method) { 826a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 827a7d4b171SHans de Goede /* 828a7d4b171SHans de Goede * We end up here if goodix_add_acpi_gpio_mappings() has 829a7d4b171SHans de Goede * called devm_acpi_dev_add_driver_gpios() because the ACPI 830a7d4b171SHans de Goede * tables did not contain name to index mappings. 831a7d4b171SHans de Goede * Check that we successfully got both GPIOs after we've 832a7d4b171SHans de Goede * added our own acpi_gpio_mapping and if we did not get both 833a7d4b171SHans de Goede * GPIOs reset irq_pin_access_method to IRQ_PIN_ACCESS_NONE. 834a7d4b171SHans de Goede */ 835a7d4b171SHans de Goede if (!ts->gpiod_int || !ts->gpiod_rst) 836a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 837a7d4b171SHans de Goede break; 838c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 839c5fca485SHans de Goede if (!ts->gpiod_rst) 840c5fca485SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 841c5fca485SHans de Goede break; 842a7d4b171SHans de Goede default: 843e070a97bSHans de Goede if (ts->gpiod_int && ts->gpiod_rst) { 8441921daceSHans de Goede ts->reset_controller_at_probe = true; 845e070a97bSHans de Goede ts->load_cfg_from_disk = true; 84649db3997SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_GPIO; 847e070a97bSHans de Goede } 848a7d4b171SHans de Goede } 84949db3997SHans de Goede 850ec6e1b40SIrina Tirdea return 0; 851ec6e1b40SIrina Tirdea } 852ec6e1b40SIrina Tirdea 853ca96ea86SBastien Nocera /** 854ca96ea86SBastien Nocera * goodix_read_config - Read the embedded configuration of the panel 855ca96ea86SBastien Nocera * 856ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 857ca96ea86SBastien Nocera * 858ca96ea86SBastien Nocera * Must be called during probe 859ca96ea86SBastien Nocera */ 860ca96ea86SBastien Nocera static void goodix_read_config(struct goodix_ts_data *ts) 861ca96ea86SBastien Nocera { 862ca96ea86SBastien Nocera u8 config[GOODIX_CONFIG_MAX_LENGTH]; 863fafef982SMarcin Niestroj int x_max, y_max; 864ca96ea86SBastien Nocera int error; 865ca96ea86SBastien Nocera 86625309004SMarcin Niestroj error = goodix_i2c_read(ts->client, ts->chip->config_addr, 86725309004SMarcin Niestroj config, ts->chip->config_len); 868ca96ea86SBastien Nocera if (error) { 869fafef982SMarcin Niestroj dev_warn(&ts->client->dev, "Error reading config: %d\n", 870ca96ea86SBastien Nocera error); 871ca96ea86SBastien Nocera ts->int_trigger_type = GOODIX_INT_TRIGGER; 872a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 873ca96ea86SBastien Nocera return; 874ca96ea86SBastien Nocera } 875ca96ea86SBastien Nocera 876a7ac7c95SAleksei Mamlin ts->int_trigger_type = config[TRIGGER_LOC] & 0x03; 877a7ac7c95SAleksei Mamlin ts->max_touch_num = config[MAX_CONTACTS_LOC] & 0x0f; 8788b5a359cSBastien Nocera 879fafef982SMarcin Niestroj x_max = get_unaligned_le16(&config[RESOLUTION_LOC]); 880fafef982SMarcin Niestroj y_max = get_unaligned_le16(&config[RESOLUTION_LOC + 2]); 881fafef982SMarcin Niestroj if (x_max && y_max) { 882fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_X, x_max - 1); 883fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_Y, y_max - 1); 884ca96ea86SBastien Nocera } 88557c80e8eSKarsten Merker } 886ca96ea86SBastien Nocera 887ca96ea86SBastien Nocera /** 888ca96ea86SBastien Nocera * goodix_read_version - Read goodix touchscreen version 889ca96ea86SBastien Nocera * 89068caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 891ca96ea86SBastien Nocera */ 89268caf858SIrina Tirdea static int goodix_read_version(struct goodix_ts_data *ts) 893ca96ea86SBastien Nocera { 894ca96ea86SBastien Nocera int error; 895ca96ea86SBastien Nocera u8 buf[6]; 896e70b0307SIrina Tirdea char id_str[5]; 897ca96ea86SBastien Nocera 89868caf858SIrina Tirdea error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf)); 899ca96ea86SBastien Nocera if (error) { 90068caf858SIrina Tirdea dev_err(&ts->client->dev, "read version failed: %d\n", error); 901ca96ea86SBastien Nocera return error; 902ca96ea86SBastien Nocera } 903ca96ea86SBastien Nocera 904e70b0307SIrina Tirdea memcpy(id_str, buf, 4); 905e70b0307SIrina Tirdea id_str[4] = 0; 90668caf858SIrina Tirdea if (kstrtou16(id_str, 10, &ts->id)) 90768caf858SIrina Tirdea ts->id = 0x1001; 908e70b0307SIrina Tirdea 90968caf858SIrina Tirdea ts->version = get_unaligned_le16(&buf[4]); 910ca96ea86SBastien Nocera 91168caf858SIrina Tirdea dev_info(&ts->client->dev, "ID %d, version: %04x\n", ts->id, 91268caf858SIrina Tirdea ts->version); 913ca96ea86SBastien Nocera 914ca96ea86SBastien Nocera return 0; 915ca96ea86SBastien Nocera } 916ca96ea86SBastien Nocera 917ca96ea86SBastien Nocera /** 918ca96ea86SBastien Nocera * goodix_i2c_test - I2C test function to check if the device answers. 919ca96ea86SBastien Nocera * 920ca96ea86SBastien Nocera * @client: the i2c client 921ca96ea86SBastien Nocera */ 922ca96ea86SBastien Nocera static int goodix_i2c_test(struct i2c_client *client) 923ca96ea86SBastien Nocera { 924ca96ea86SBastien Nocera int retry = 0; 925ca96ea86SBastien Nocera int error; 926ca96ea86SBastien Nocera u8 test; 927ca96ea86SBastien Nocera 928ca96ea86SBastien Nocera while (retry++ < 2) { 92925309004SMarcin Niestroj error = goodix_i2c_read(client, GOODIX_REG_ID, 930ca96ea86SBastien Nocera &test, 1); 931ca96ea86SBastien Nocera if (!error) 932ca96ea86SBastien Nocera return 0; 933ca96ea86SBastien Nocera 934ca96ea86SBastien Nocera dev_err(&client->dev, "i2c test failed attempt %d: %d\n", 935ca96ea86SBastien Nocera retry, error); 936ca96ea86SBastien Nocera msleep(20); 937ca96ea86SBastien Nocera } 938ca96ea86SBastien Nocera 939ca96ea86SBastien Nocera return error; 940ca96ea86SBastien Nocera } 941ca96ea86SBastien Nocera 942ca96ea86SBastien Nocera /** 94368caf858SIrina Tirdea * goodix_configure_dev - Finish device initialization 94468caf858SIrina Tirdea * 94568caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 94668caf858SIrina Tirdea * 94768caf858SIrina Tirdea * Must be called from probe to finish initialization of the device. 94868caf858SIrina Tirdea * Contains the common initialization code for both devices that 94968caf858SIrina Tirdea * declare gpio pins and devices that do not. It is either called 95068caf858SIrina Tirdea * directly from probe or from request_firmware_wait callback. 95168caf858SIrina Tirdea */ 95268caf858SIrina Tirdea static int goodix_configure_dev(struct goodix_ts_data *ts) 95368caf858SIrina Tirdea { 95468caf858SIrina Tirdea int error; 95568caf858SIrina Tirdea 956fafef982SMarcin Niestroj ts->int_trigger_type = GOODIX_INT_TRIGGER; 957fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 958ad48cf5eSKarsten Merker 959fafef982SMarcin Niestroj ts->input_dev = devm_input_allocate_device(&ts->client->dev); 960fafef982SMarcin Niestroj if (!ts->input_dev) { 961fafef982SMarcin Niestroj dev_err(&ts->client->dev, "Failed to allocate input device."); 962fafef982SMarcin Niestroj return -ENOMEM; 963fafef982SMarcin Niestroj } 964fafef982SMarcin Niestroj 965fafef982SMarcin Niestroj ts->input_dev->name = "Goodix Capacitive TouchScreen"; 966fafef982SMarcin Niestroj ts->input_dev->phys = "input/ts"; 967fafef982SMarcin Niestroj ts->input_dev->id.bustype = BUS_I2C; 968fafef982SMarcin Niestroj ts->input_dev->id.vendor = 0x0416; 969fafef982SMarcin Niestroj ts->input_dev->id.product = ts->id; 970fafef982SMarcin Niestroj ts->input_dev->id.version = ts->version; 971fafef982SMarcin Niestroj 972fafef982SMarcin Niestroj /* Capacitive Windows/Home button on some devices */ 973fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_KEY, KEY_LEFTMETA); 974fafef982SMarcin Niestroj 975fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X); 976fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y); 977fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 978fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 979fafef982SMarcin Niestroj 980fafef982SMarcin Niestroj /* Read configuration and apply touchscreen parameters */ 98168caf858SIrina Tirdea goodix_read_config(ts); 98268caf858SIrina Tirdea 983fafef982SMarcin Niestroj /* Try overriding touchscreen parameters via device properties */ 984fafef982SMarcin Niestroj touchscreen_parse_properties(ts->input_dev, true, &ts->prop); 985fafef982SMarcin Niestroj 986fafef982SMarcin Niestroj if (!ts->prop.max_x || !ts->prop.max_y || !ts->max_touch_num) { 987c1c00aa5SGuido Günther dev_err(&ts->client->dev, 988c1c00aa5SGuido Günther "Invalid config (%d, %d, %d), using defaults\n", 989c1c00aa5SGuido Günther ts->prop.max_x, ts->prop.max_y, ts->max_touch_num); 990fafef982SMarcin Niestroj ts->prop.max_x = GOODIX_MAX_WIDTH - 1; 991fafef982SMarcin Niestroj ts->prop.max_y = GOODIX_MAX_HEIGHT - 1; 992fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 993fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 994fafef982SMarcin Niestroj ABS_MT_POSITION_X, ts->prop.max_x); 995fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 996fafef982SMarcin Niestroj ABS_MT_POSITION_Y, ts->prop.max_y); 997fafef982SMarcin Niestroj } 998fafef982SMarcin Niestroj 999fafef982SMarcin Niestroj if (dmi_check_system(rotated_screen)) { 1000fafef982SMarcin Niestroj ts->prop.invert_x = true; 1001fafef982SMarcin Niestroj ts->prop.invert_y = true; 1002fafef982SMarcin Niestroj dev_dbg(&ts->client->dev, 1003fafef982SMarcin Niestroj "Applying '180 degrees rotated screen' quirk\n"); 1004fafef982SMarcin Niestroj } 1005fafef982SMarcin Niestroj 1006bd3b8480SYauhen Kharuzhy if (dmi_check_system(nine_bytes_report)) { 1007bd3b8480SYauhen Kharuzhy ts->contact_size = 9; 1008bd3b8480SYauhen Kharuzhy 1009bd3b8480SYauhen Kharuzhy dev_dbg(&ts->client->dev, 1010bd3b8480SYauhen Kharuzhy "Non-standard 9-bytes report format quirk\n"); 1011bd3b8480SYauhen Kharuzhy } 1012bd3b8480SYauhen Kharuzhy 10131dd5ddc1SSergei A. Trusov if (dmi_check_system(inverted_x_screen)) { 10141dd5ddc1SSergei A. Trusov ts->prop.invert_x = true; 10151dd5ddc1SSergei A. Trusov dev_dbg(&ts->client->dev, 10161dd5ddc1SSergei A. Trusov "Applying 'inverted x screen' quirk\n"); 10171dd5ddc1SSergei A. Trusov } 10181dd5ddc1SSergei A. Trusov 1019fafef982SMarcin Niestroj error = input_mt_init_slots(ts->input_dev, ts->max_touch_num, 1020fafef982SMarcin Niestroj INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); 1021fafef982SMarcin Niestroj if (error) { 1022fafef982SMarcin Niestroj dev_err(&ts->client->dev, 1023fafef982SMarcin Niestroj "Failed to initialize MT slots: %d", error); 102468caf858SIrina Tirdea return error; 1025fafef982SMarcin Niestroj } 1026fafef982SMarcin Niestroj 1027fafef982SMarcin Niestroj error = input_register_device(ts->input_dev); 1028fafef982SMarcin Niestroj if (error) { 1029fafef982SMarcin Niestroj dev_err(&ts->client->dev, 1030fafef982SMarcin Niestroj "Failed to register input device: %d", error); 1031fafef982SMarcin Niestroj return error; 1032fafef982SMarcin Niestroj } 103368caf858SIrina Tirdea 10345ab09d6aSIrina Tirdea ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT; 10355ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 103668caf858SIrina Tirdea if (error) { 103768caf858SIrina Tirdea dev_err(&ts->client->dev, "request IRQ failed: %d\n", error); 103868caf858SIrina Tirdea return error; 103968caf858SIrina Tirdea } 104068caf858SIrina Tirdea 104168caf858SIrina Tirdea return 0; 104268caf858SIrina Tirdea } 104368caf858SIrina Tirdea 104468caf858SIrina Tirdea /** 104568caf858SIrina Tirdea * goodix_config_cb - Callback to finish device init 104668caf858SIrina Tirdea * 104768caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 104868caf858SIrina Tirdea * 104968caf858SIrina Tirdea * request_firmware_wait callback that finishes 105068caf858SIrina Tirdea * initialization of the device. 105168caf858SIrina Tirdea */ 105268caf858SIrina Tirdea static void goodix_config_cb(const struct firmware *cfg, void *ctx) 105368caf858SIrina Tirdea { 105468caf858SIrina Tirdea struct goodix_ts_data *ts = ctx; 105568caf858SIrina Tirdea int error; 105668caf858SIrina Tirdea 105768caf858SIrina Tirdea if (cfg) { 105868caf858SIrina Tirdea /* send device configuration to the firmware */ 105968caf858SIrina Tirdea error = goodix_send_cfg(ts, cfg); 106068caf858SIrina Tirdea if (error) 106168caf858SIrina Tirdea goto err_release_cfg; 106268caf858SIrina Tirdea } 106368caf858SIrina Tirdea 106468caf858SIrina Tirdea goodix_configure_dev(ts); 106568caf858SIrina Tirdea 106668caf858SIrina Tirdea err_release_cfg: 106768caf858SIrina Tirdea release_firmware(cfg); 106868caf858SIrina Tirdea complete_all(&ts->firmware_loading_complete); 106968caf858SIrina Tirdea } 107068caf858SIrina Tirdea 1071ae97fb58SJagan Teki static void goodix_disable_regulators(void *arg) 1072ae97fb58SJagan Teki { 1073ae97fb58SJagan Teki struct goodix_ts_data *ts = arg; 1074ae97fb58SJagan Teki 1075ae97fb58SJagan Teki regulator_disable(ts->vddio); 1076ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1077ae97fb58SJagan Teki } 1078ae97fb58SJagan Teki 1079ca96ea86SBastien Nocera static int goodix_ts_probe(struct i2c_client *client, 1080ca96ea86SBastien Nocera const struct i2c_device_id *id) 1081ca96ea86SBastien Nocera { 1082ca96ea86SBastien Nocera struct goodix_ts_data *ts; 1083ca96ea86SBastien Nocera int error; 1084ca96ea86SBastien Nocera 1085ca96ea86SBastien Nocera dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr); 1086ca96ea86SBastien Nocera 1087ca96ea86SBastien Nocera if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 1088ca96ea86SBastien Nocera dev_err(&client->dev, "I2C check functionality failed.\n"); 1089ca96ea86SBastien Nocera return -ENXIO; 1090ca96ea86SBastien Nocera } 1091ca96ea86SBastien Nocera 1092ca96ea86SBastien Nocera ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); 1093ca96ea86SBastien Nocera if (!ts) 1094ca96ea86SBastien Nocera return -ENOMEM; 1095ca96ea86SBastien Nocera 1096ca96ea86SBastien Nocera ts->client = client; 1097ca96ea86SBastien Nocera i2c_set_clientdata(client, ts); 109868caf858SIrina Tirdea init_completion(&ts->firmware_loading_complete); 1099bd3b8480SYauhen Kharuzhy ts->contact_size = GOODIX_CONTACT_SIZE; 1100ca96ea86SBastien Nocera 1101ec6e1b40SIrina Tirdea error = goodix_get_gpio_config(ts); 1102ec6e1b40SIrina Tirdea if (error) 1103ec6e1b40SIrina Tirdea return error; 1104ec6e1b40SIrina Tirdea 1105ae97fb58SJagan Teki /* power up the controller */ 1106ae97fb58SJagan Teki error = regulator_enable(ts->avdd28); 1107ae97fb58SJagan Teki if (error) { 1108ae97fb58SJagan Teki dev_err(&client->dev, 1109ae97fb58SJagan Teki "Failed to enable AVDD28 regulator: %d\n", 1110ae97fb58SJagan Teki error); 1111ae97fb58SJagan Teki return error; 1112ae97fb58SJagan Teki } 1113ae97fb58SJagan Teki 1114ae97fb58SJagan Teki error = regulator_enable(ts->vddio); 1115ae97fb58SJagan Teki if (error) { 1116ae97fb58SJagan Teki dev_err(&client->dev, 1117ae97fb58SJagan Teki "Failed to enable VDDIO regulator: %d\n", 1118ae97fb58SJagan Teki error); 1119ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1120ae97fb58SJagan Teki return error; 1121ae97fb58SJagan Teki } 1122ae97fb58SJagan Teki 1123ae97fb58SJagan Teki error = devm_add_action_or_reset(&client->dev, 1124ae97fb58SJagan Teki goodix_disable_regulators, ts); 1125ae97fb58SJagan Teki if (error) 1126ae97fb58SJagan Teki return error; 1127ae97fb58SJagan Teki 11281921daceSHans de Goede if (ts->reset_controller_at_probe) { 1129ec6e1b40SIrina Tirdea /* reset the controller */ 1130ec6e1b40SIrina Tirdea error = goodix_reset(ts); 1131ec6e1b40SIrina Tirdea if (error) { 1132ec6e1b40SIrina Tirdea dev_err(&client->dev, "Controller reset failed.\n"); 1133ec6e1b40SIrina Tirdea return error; 1134ec6e1b40SIrina Tirdea } 1135ec6e1b40SIrina Tirdea } 1136ec6e1b40SIrina Tirdea 1137ca96ea86SBastien Nocera error = goodix_i2c_test(client); 1138ca96ea86SBastien Nocera if (error) { 1139ca96ea86SBastien Nocera dev_err(&client->dev, "I2C communication failure: %d\n", error); 1140ca96ea86SBastien Nocera return error; 1141ca96ea86SBastien Nocera } 1142ca96ea86SBastien Nocera 114368caf858SIrina Tirdea error = goodix_read_version(ts); 1144ca96ea86SBastien Nocera if (error) { 1145ca96ea86SBastien Nocera dev_err(&client->dev, "Read version failed.\n"); 1146ca96ea86SBastien Nocera return error; 1147ca96ea86SBastien Nocera } 1148ca96ea86SBastien Nocera 114925309004SMarcin Niestroj ts->chip = goodix_get_chip_data(ts->id); 1150a779fbc6SIrina Tirdea 1151e070a97bSHans de Goede if (ts->load_cfg_from_disk) { 115268caf858SIrina Tirdea /* update device config */ 115368caf858SIrina Tirdea ts->cfg_name = devm_kasprintf(&client->dev, GFP_KERNEL, 115468caf858SIrina Tirdea "goodix_%d_cfg.bin", ts->id); 115568caf858SIrina Tirdea if (!ts->cfg_name) 115668caf858SIrina Tirdea return -ENOMEM; 1157ca96ea86SBastien Nocera 115868caf858SIrina Tirdea error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name, 115968caf858SIrina Tirdea &client->dev, GFP_KERNEL, ts, 116068caf858SIrina Tirdea goodix_config_cb); 1161ca96ea86SBastien Nocera if (error) { 116268caf858SIrina Tirdea dev_err(&client->dev, 116368caf858SIrina Tirdea "Failed to invoke firmware loader: %d\n", 116468caf858SIrina Tirdea error); 1165ca96ea86SBastien Nocera return error; 1166ca96ea86SBastien Nocera } 1167ca96ea86SBastien Nocera 1168ca96ea86SBastien Nocera return 0; 116968caf858SIrina Tirdea } else { 117068caf858SIrina Tirdea error = goodix_configure_dev(ts); 117168caf858SIrina Tirdea if (error) 117268caf858SIrina Tirdea return error; 117368caf858SIrina Tirdea } 117468caf858SIrina Tirdea 117568caf858SIrina Tirdea return 0; 117668caf858SIrina Tirdea } 117768caf858SIrina Tirdea 117868caf858SIrina Tirdea static int goodix_ts_remove(struct i2c_client *client) 117968caf858SIrina Tirdea { 118068caf858SIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 118168caf858SIrina Tirdea 1182e070a97bSHans de Goede if (ts->load_cfg_from_disk) 118368caf858SIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 118468caf858SIrina Tirdea 118568caf858SIrina Tirdea return 0; 1186ca96ea86SBastien Nocera } 1187ca96ea86SBastien Nocera 11885ab09d6aSIrina Tirdea static int __maybe_unused goodix_suspend(struct device *dev) 11895ab09d6aSIrina Tirdea { 11905ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 11915ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 11925ab09d6aSIrina Tirdea int error; 11935ab09d6aSIrina Tirdea 1194e070a97bSHans de Goede if (ts->load_cfg_from_disk) 1195e070a97bSHans de Goede wait_for_completion(&ts->firmware_loading_complete); 1196e070a97bSHans de Goede 11975ab09d6aSIrina Tirdea /* We need gpio pins to suspend/resume */ 119849db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1199faec44b6SHans de Goede disable_irq(client->irq); 12005ab09d6aSIrina Tirdea return 0; 1201faec44b6SHans de Goede } 12025ab09d6aSIrina Tirdea 12035ab09d6aSIrina Tirdea /* Free IRQ as IRQ pin is used as output in the suspend sequence */ 12045ab09d6aSIrina Tirdea goodix_free_irq(ts); 12055ab09d6aSIrina Tirdea 12065ab09d6aSIrina Tirdea /* Output LOW on the INT pin for 5 ms */ 120749db3997SHans de Goede error = goodix_irq_direction_output(ts, 0); 12085ab09d6aSIrina Tirdea if (error) { 12095ab09d6aSIrina Tirdea goodix_request_irq(ts); 12105ab09d6aSIrina Tirdea return error; 12115ab09d6aSIrina Tirdea } 12125ab09d6aSIrina Tirdea 12135ab09d6aSIrina Tirdea usleep_range(5000, 6000); 12145ab09d6aSIrina Tirdea 12155ab09d6aSIrina Tirdea error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND, 12165ab09d6aSIrina Tirdea GOODIX_CMD_SCREEN_OFF); 12175ab09d6aSIrina Tirdea if (error) { 12185ab09d6aSIrina Tirdea dev_err(&ts->client->dev, "Screen off command failed\n"); 121949db3997SHans de Goede goodix_irq_direction_input(ts); 12205ab09d6aSIrina Tirdea goodix_request_irq(ts); 12215ab09d6aSIrina Tirdea return -EAGAIN; 12225ab09d6aSIrina Tirdea } 12235ab09d6aSIrina Tirdea 12245ab09d6aSIrina Tirdea /* 12255ab09d6aSIrina Tirdea * The datasheet specifies that the interval between sending screen-off 12265ab09d6aSIrina Tirdea * command and wake-up should be longer than 58 ms. To avoid waking up 12275ab09d6aSIrina Tirdea * sooner, delay 58ms here. 12285ab09d6aSIrina Tirdea */ 12295ab09d6aSIrina Tirdea msleep(58); 12305ab09d6aSIrina Tirdea return 0; 12315ab09d6aSIrina Tirdea } 12325ab09d6aSIrina Tirdea 12335ab09d6aSIrina Tirdea static int __maybe_unused goodix_resume(struct device *dev) 12345ab09d6aSIrina Tirdea { 12355ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 12365ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 12375ab09d6aSIrina Tirdea int error; 12385ab09d6aSIrina Tirdea 123949db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1240faec44b6SHans de Goede enable_irq(client->irq); 12415ab09d6aSIrina Tirdea return 0; 1242faec44b6SHans de Goede } 12435ab09d6aSIrina Tirdea 12445ab09d6aSIrina Tirdea /* 12455ab09d6aSIrina Tirdea * Exit sleep mode by outputting HIGH level to INT pin 12465ab09d6aSIrina Tirdea * for 2ms~5ms. 12475ab09d6aSIrina Tirdea */ 124849db3997SHans de Goede error = goodix_irq_direction_output(ts, 1); 12495ab09d6aSIrina Tirdea if (error) 12505ab09d6aSIrina Tirdea return error; 12515ab09d6aSIrina Tirdea 12525ab09d6aSIrina Tirdea usleep_range(2000, 5000); 12535ab09d6aSIrina Tirdea 12545ab09d6aSIrina Tirdea error = goodix_int_sync(ts); 12555ab09d6aSIrina Tirdea if (error) 12565ab09d6aSIrina Tirdea return error; 12575ab09d6aSIrina Tirdea 12585ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 12595ab09d6aSIrina Tirdea if (error) 12605ab09d6aSIrina Tirdea return error; 12615ab09d6aSIrina Tirdea 12625ab09d6aSIrina Tirdea return 0; 12635ab09d6aSIrina Tirdea } 12645ab09d6aSIrina Tirdea 12655ab09d6aSIrina Tirdea static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume); 12665ab09d6aSIrina Tirdea 1267ca96ea86SBastien Nocera static const struct i2c_device_id goodix_ts_id[] = { 1268ca96ea86SBastien Nocera { "GDIX1001:00", 0 }, 1269ca96ea86SBastien Nocera { } 1270ca96ea86SBastien Nocera }; 12712e9e910eSJavier Martinez Canillas MODULE_DEVICE_TABLE(i2c, goodix_ts_id); 1272ca96ea86SBastien Nocera 1273771d8f1bSAleksei Mamlin #ifdef CONFIG_ACPI 1274ca96ea86SBastien Nocera static const struct acpi_device_id goodix_acpi_match[] = { 1275ca96ea86SBastien Nocera { "GDIX1001", 0 }, 12765ca4d1aeSEthan Lee { "GDIX1002", 0 }, 1277ca96ea86SBastien Nocera { } 1278ca96ea86SBastien Nocera }; 1279ca96ea86SBastien Nocera MODULE_DEVICE_TABLE(acpi, goodix_acpi_match); 1280771d8f1bSAleksei Mamlin #endif 1281771d8f1bSAleksei Mamlin 1282771d8f1bSAleksei Mamlin #ifdef CONFIG_OF 1283771d8f1bSAleksei Mamlin static const struct of_device_id goodix_of_match[] = { 128425309004SMarcin Niestroj { .compatible = "goodix,gt1151" }, 1285a5f50c50SJagan Teki { .compatible = "goodix,gt5663" }, 128684ef1b33SGuido Günther { .compatible = "goodix,gt5688" }, 1287771d8f1bSAleksei Mamlin { .compatible = "goodix,gt911" }, 1288771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9110" }, 1289771d8f1bSAleksei Mamlin { .compatible = "goodix,gt912" }, 1290771d8f1bSAleksei Mamlin { .compatible = "goodix,gt927" }, 1291771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9271" }, 1292771d8f1bSAleksei Mamlin { .compatible = "goodix,gt928" }, 1293771d8f1bSAleksei Mamlin { .compatible = "goodix,gt967" }, 1294771d8f1bSAleksei Mamlin { } 1295771d8f1bSAleksei Mamlin }; 1296771d8f1bSAleksei Mamlin MODULE_DEVICE_TABLE(of, goodix_of_match); 1297771d8f1bSAleksei Mamlin #endif 1298ca96ea86SBastien Nocera 1299ca96ea86SBastien Nocera static struct i2c_driver goodix_ts_driver = { 1300ca96ea86SBastien Nocera .probe = goodix_ts_probe, 130168caf858SIrina Tirdea .remove = goodix_ts_remove, 1302ca96ea86SBastien Nocera .id_table = goodix_ts_id, 1303ca96ea86SBastien Nocera .driver = { 1304ca96ea86SBastien Nocera .name = "Goodix-TS", 1305771d8f1bSAleksei Mamlin .acpi_match_table = ACPI_PTR(goodix_acpi_match), 1306771d8f1bSAleksei Mamlin .of_match_table = of_match_ptr(goodix_of_match), 13075ab09d6aSIrina Tirdea .pm = &goodix_pm_ops, 1308ca96ea86SBastien Nocera }, 1309ca96ea86SBastien Nocera }; 1310ca96ea86SBastien Nocera module_i2c_driver(goodix_ts_driver); 1311ca96ea86SBastien Nocera 1312ca96ea86SBastien Nocera MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); 1313ca96ea86SBastien Nocera MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>"); 1314ca96ea86SBastien Nocera MODULE_DESCRIPTION("Goodix touchscreen driver"); 1315ca96ea86SBastien Nocera MODULE_LICENSE("GPL v2"); 1316