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 41492ee52cSDmitry Mastykin #define GOODIX_MAX_KEYS 7 42aebfc52cSHans de Goede 43686e8a24SHans de Goede #define GOODIX_CONFIG_MIN_LENGTH 186 44aebfc52cSHans de Goede #define GOODIX_CONFIG_911_LENGTH 186 45aebfc52cSHans de Goede #define GOODIX_CONFIG_967_LENGTH 228 46686e8a24SHans de Goede #define GOODIX_CONFIG_GT9X_LENGTH 240 47686e8a24SHans de Goede #define GOODIX_CONFIG_MAX_LENGTH 240 48aebfc52cSHans de Goede 49aebfc52cSHans de Goede /* Register defines */ 50aebfc52cSHans de Goede #define GOODIX_REG_COMMAND 0x8040 51aebfc52cSHans de Goede #define GOODIX_CMD_SCREEN_OFF 0x05 52aebfc52cSHans de Goede 53aebfc52cSHans de Goede #define GOODIX_READ_COOR_ADDR 0x814E 54aebfc52cSHans de Goede #define GOODIX_GT1X_REG_CONFIG_DATA 0x8050 55aebfc52cSHans de Goede #define GOODIX_GT9X_REG_CONFIG_DATA 0x8047 56aebfc52cSHans de Goede #define GOODIX_REG_ID 0x8140 57aebfc52cSHans de Goede 58aebfc52cSHans de Goede #define GOODIX_BUFFER_STATUS_READY BIT(7) 59492ee52cSDmitry Mastykin #define GOODIX_HAVE_KEY BIT(4) 60aebfc52cSHans de Goede #define GOODIX_BUFFER_STATUS_TIMEOUT 20 61aebfc52cSHans de Goede 62aebfc52cSHans de Goede #define RESOLUTION_LOC 1 63aebfc52cSHans de Goede #define MAX_CONTACTS_LOC 5 64aebfc52cSHans de Goede #define TRIGGER_LOC 6 65aebfc52cSHans de Goede 6625309004SMarcin Niestroj struct goodix_ts_data; 6725309004SMarcin Niestroj 6849db3997SHans de Goede enum goodix_irq_pin_access_method { 6949db3997SHans de Goede IRQ_PIN_ACCESS_NONE, 7049db3997SHans de Goede IRQ_PIN_ACCESS_GPIO, 71a7d4b171SHans de Goede IRQ_PIN_ACCESS_ACPI_GPIO, 72c5fca485SHans de Goede IRQ_PIN_ACCESS_ACPI_METHOD, 7349db3997SHans de Goede }; 7449db3997SHans de Goede 7525309004SMarcin Niestroj struct goodix_chip_data { 7625309004SMarcin Niestroj u16 config_addr; 7725309004SMarcin Niestroj int config_len; 781a67448fSHans de Goede int (*check_config)(struct goodix_ts_data *ts, const u8 *cfg, int len); 79de956caeSHans de Goede void (*calc_config_checksum)(struct goodix_ts_data *ts); 8025309004SMarcin Niestroj }; 8125309004SMarcin Niestroj 82cae102e2SIcenowy Zheng struct goodix_chip_id { 83cae102e2SIcenowy Zheng const char *id; 84cae102e2SIcenowy Zheng const struct goodix_chip_data *data; 85cae102e2SIcenowy Zheng }; 86cae102e2SIcenowy Zheng 87cae102e2SIcenowy Zheng #define GOODIX_ID_MAX_LEN 4 88cae102e2SIcenowy Zheng 89ca96ea86SBastien Nocera struct goodix_ts_data { 90ca96ea86SBastien Nocera struct i2c_client *client; 91ca96ea86SBastien Nocera struct input_dev *input_dev; 9225309004SMarcin Niestroj const struct goodix_chip_data *chip; 93fafef982SMarcin Niestroj struct touchscreen_properties prop; 94ca96ea86SBastien Nocera unsigned int max_touch_num; 95ca96ea86SBastien Nocera unsigned int int_trigger_type; 96ae97fb58SJagan Teki struct regulator *avdd28; 97ae97fb58SJagan Teki struct regulator *vddio; 98ec6e1b40SIrina Tirdea struct gpio_desc *gpiod_int; 99ec6e1b40SIrina Tirdea struct gpio_desc *gpiod_rst; 100a7d4b171SHans de Goede int gpio_count; 101a7d4b171SHans de Goede int gpio_int_idx; 102cae102e2SIcenowy Zheng char id[GOODIX_ID_MAX_LEN + 1]; 10368caf858SIrina Tirdea u16 version; 10468caf858SIrina Tirdea const char *cfg_name; 1051921daceSHans de Goede bool reset_controller_at_probe; 106e070a97bSHans de Goede bool load_cfg_from_disk; 10768caf858SIrina Tirdea struct completion firmware_loading_complete; 1085ab09d6aSIrina Tirdea unsigned long irq_flags; 10949db3997SHans de Goede enum goodix_irq_pin_access_method irq_pin_access_method; 110bd3b8480SYauhen Kharuzhy unsigned int contact_size; 111de956caeSHans de Goede u8 config[GOODIX_CONFIG_MAX_LENGTH]; 112492ee52cSDmitry Mastykin unsigned short keymap[GOODIX_MAX_KEYS]; 113ca96ea86SBastien Nocera }; 114ca96ea86SBastien Nocera 11525309004SMarcin Niestroj static int goodix_check_cfg_8(struct goodix_ts_data *ts, 1161a67448fSHans de Goede const u8 *cfg, int len); 11725309004SMarcin Niestroj static int goodix_check_cfg_16(struct goodix_ts_data *ts, 1181a67448fSHans de Goede const u8 *cfg, int len); 119de956caeSHans de Goede static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts); 120de956caeSHans de Goede static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts); 12125309004SMarcin Niestroj 12225309004SMarcin Niestroj static const struct goodix_chip_data gt1x_chip_data = { 12325309004SMarcin Niestroj .config_addr = GOODIX_GT1X_REG_CONFIG_DATA, 124686e8a24SHans de Goede .config_len = GOODIX_CONFIG_GT9X_LENGTH, 12525309004SMarcin Niestroj .check_config = goodix_check_cfg_16, 126de956caeSHans de Goede .calc_config_checksum = goodix_calc_cfg_checksum_16, 12725309004SMarcin Niestroj }; 12825309004SMarcin Niestroj 12925309004SMarcin Niestroj static const struct goodix_chip_data gt911_chip_data = { 13025309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 13125309004SMarcin Niestroj .config_len = GOODIX_CONFIG_911_LENGTH, 13225309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 133de956caeSHans de Goede .calc_config_checksum = goodix_calc_cfg_checksum_8, 13425309004SMarcin Niestroj }; 13525309004SMarcin Niestroj 13625309004SMarcin Niestroj static const struct goodix_chip_data gt967_chip_data = { 13725309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 13825309004SMarcin Niestroj .config_len = GOODIX_CONFIG_967_LENGTH, 13925309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 140de956caeSHans de Goede .calc_config_checksum = goodix_calc_cfg_checksum_8, 14125309004SMarcin Niestroj }; 14225309004SMarcin Niestroj 14325309004SMarcin Niestroj static const struct goodix_chip_data gt9x_chip_data = { 14425309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 145686e8a24SHans de Goede .config_len = GOODIX_CONFIG_GT9X_LENGTH, 14625309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 147de956caeSHans de Goede .calc_config_checksum = goodix_calc_cfg_checksum_8, 14825309004SMarcin Niestroj }; 14925309004SMarcin Niestroj 150cae102e2SIcenowy Zheng static const struct goodix_chip_id goodix_chip_ids[] = { 151cae102e2SIcenowy Zheng { .id = "1151", .data = >1x_chip_data }, 152cae102e2SIcenowy Zheng { .id = "5663", .data = >1x_chip_data }, 153cae102e2SIcenowy Zheng { .id = "5688", .data = >1x_chip_data }, 154cae102e2SIcenowy Zheng 155cae102e2SIcenowy Zheng { .id = "911", .data = >911_chip_data }, 156cae102e2SIcenowy Zheng { .id = "9271", .data = >911_chip_data }, 157cae102e2SIcenowy Zheng { .id = "9110", .data = >911_chip_data }, 158cae102e2SIcenowy Zheng { .id = "927", .data = >911_chip_data }, 159cae102e2SIcenowy Zheng { .id = "928", .data = >911_chip_data }, 160cae102e2SIcenowy Zheng 161cae102e2SIcenowy Zheng { .id = "912", .data = >967_chip_data }, 162cae102e2SIcenowy Zheng { .id = "967", .data = >967_chip_data }, 163cae102e2SIcenowy Zheng { } 164cae102e2SIcenowy Zheng }; 165cae102e2SIcenowy Zheng 166ca96ea86SBastien Nocera static const unsigned long goodix_irq_flags[] = { 167ca96ea86SBastien Nocera IRQ_TYPE_EDGE_RISING, 168ca96ea86SBastien Nocera IRQ_TYPE_EDGE_FALLING, 169ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_LOW, 170ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_HIGH, 171ca96ea86SBastien Nocera }; 172ca96ea86SBastien Nocera 1738b5a359cSBastien Nocera /* 1748b5a359cSBastien Nocera * Those tablets have their coordinates origin at the bottom right 1758b5a359cSBastien Nocera * of the tablet, as if rotated 180 degrees 1768b5a359cSBastien Nocera */ 1778b5a359cSBastien Nocera static const struct dmi_system_id rotated_screen[] = { 1788b5a359cSBastien Nocera #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1798b5a359cSBastien Nocera { 180df5b5e55SHans de Goede .ident = "Teclast X89", 181df5b5e55SHans de Goede .matches = { 182df5b5e55SHans de Goede /* tPAD is too generic, also match on bios date */ 183df5b5e55SHans de Goede DMI_MATCH(DMI_BOARD_VENDOR, "TECLAST"), 184df5b5e55SHans de Goede DMI_MATCH(DMI_BOARD_NAME, "tPAD"), 185df5b5e55SHans de Goede DMI_MATCH(DMI_BIOS_DATE, "12/19/2014"), 186df5b5e55SHans de Goede }, 187df5b5e55SHans de Goede }, 188df5b5e55SHans de Goede { 1898b5a359cSBastien Nocera .ident = "WinBook TW100", 1908b5a359cSBastien Nocera .matches = { 1918b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 1928b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW100") 1938b5a359cSBastien Nocera } 1948b5a359cSBastien Nocera }, 1958b5a359cSBastien Nocera { 1968b5a359cSBastien Nocera .ident = "WinBook TW700", 1978b5a359cSBastien Nocera .matches = { 1988b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 1998b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW700") 2008b5a359cSBastien Nocera }, 2018b5a359cSBastien Nocera }, 2028b5a359cSBastien Nocera #endif 2038b5a359cSBastien Nocera {} 2048b5a359cSBastien Nocera }; 2058b5a359cSBastien Nocera 206bd3b8480SYauhen Kharuzhy static const struct dmi_system_id nine_bytes_report[] = { 207bd3b8480SYauhen Kharuzhy #if defined(CONFIG_DMI) && defined(CONFIG_X86) 208bd3b8480SYauhen Kharuzhy { 209bd3b8480SYauhen Kharuzhy .ident = "Lenovo YogaBook", 210bd3b8480SYauhen Kharuzhy /* YB1-X91L/F and YB1-X90L/F */ 211bd3b8480SYauhen Kharuzhy .matches = { 212bd3b8480SYauhen Kharuzhy DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X9") 213bd3b8480SYauhen Kharuzhy } 214bd3b8480SYauhen Kharuzhy }, 215bd3b8480SYauhen Kharuzhy #endif 216bd3b8480SYauhen Kharuzhy {} 217bd3b8480SYauhen Kharuzhy }; 218bd3b8480SYauhen Kharuzhy 2191dd5ddc1SSergei A. Trusov /* 2201dd5ddc1SSergei A. Trusov * Those tablets have their x coordinate inverted 2211dd5ddc1SSergei A. Trusov */ 2221dd5ddc1SSergei A. Trusov static const struct dmi_system_id inverted_x_screen[] = { 2231dd5ddc1SSergei A. Trusov #if defined(CONFIG_DMI) && defined(CONFIG_X86) 2241dd5ddc1SSergei A. Trusov { 2251dd5ddc1SSergei A. Trusov .ident = "Cube I15-TC", 2261dd5ddc1SSergei A. Trusov .matches = { 2271dd5ddc1SSergei A. Trusov DMI_MATCH(DMI_SYS_VENDOR, "Cube"), 2281dd5ddc1SSergei A. Trusov DMI_MATCH(DMI_PRODUCT_NAME, "I15-TC") 2291dd5ddc1SSergei A. Trusov }, 2301dd5ddc1SSergei A. Trusov }, 2311dd5ddc1SSergei A. Trusov #endif 2321dd5ddc1SSergei A. Trusov {} 2331dd5ddc1SSergei A. Trusov }; 2341dd5ddc1SSergei A. Trusov 235ca96ea86SBastien Nocera /** 236ca96ea86SBastien Nocera * goodix_i2c_read - read data from a register of the i2c slave device. 237ca96ea86SBastien Nocera * 238ca96ea86SBastien Nocera * @client: i2c device. 239ca96ea86SBastien Nocera * @reg: the register to read from. 240ca96ea86SBastien Nocera * @buf: raw write data buffer. 241ca96ea86SBastien Nocera * @len: length of the buffer to write 242ca96ea86SBastien Nocera */ 243ca96ea86SBastien Nocera static int goodix_i2c_read(struct i2c_client *client, 244ca96ea86SBastien Nocera u16 reg, u8 *buf, int len) 245ca96ea86SBastien Nocera { 246ca96ea86SBastien Nocera struct i2c_msg msgs[2]; 247fafef982SMarcin Niestroj __be16 wbuf = cpu_to_be16(reg); 248ca96ea86SBastien Nocera int ret; 249ca96ea86SBastien Nocera 250ca96ea86SBastien Nocera msgs[0].flags = 0; 251ca96ea86SBastien Nocera msgs[0].addr = client->addr; 252ca96ea86SBastien Nocera msgs[0].len = 2; 253ca96ea86SBastien Nocera msgs[0].buf = (u8 *)&wbuf; 254ca96ea86SBastien Nocera 255ca96ea86SBastien Nocera msgs[1].flags = I2C_M_RD; 256ca96ea86SBastien Nocera msgs[1].addr = client->addr; 257ca96ea86SBastien Nocera msgs[1].len = len; 258ca96ea86SBastien Nocera msgs[1].buf = buf; 259ca96ea86SBastien Nocera 260ca96ea86SBastien Nocera ret = i2c_transfer(client->adapter, msgs, 2); 261ca96ea86SBastien Nocera return ret < 0 ? ret : (ret != ARRAY_SIZE(msgs) ? -EIO : 0); 262ca96ea86SBastien Nocera } 263ca96ea86SBastien Nocera 26468caf858SIrina Tirdea /** 26568caf858SIrina Tirdea * goodix_i2c_write - write data to a register of the i2c slave device. 26668caf858SIrina Tirdea * 26768caf858SIrina Tirdea * @client: i2c device. 26868caf858SIrina Tirdea * @reg: the register to write to. 26968caf858SIrina Tirdea * @buf: raw data buffer to write. 27068caf858SIrina Tirdea * @len: length of the buffer to write 27168caf858SIrina Tirdea */ 27268caf858SIrina Tirdea static int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf, 27368caf858SIrina Tirdea unsigned len) 27468caf858SIrina Tirdea { 27568caf858SIrina Tirdea u8 *addr_buf; 27668caf858SIrina Tirdea struct i2c_msg msg; 27768caf858SIrina Tirdea int ret; 27868caf858SIrina Tirdea 27968caf858SIrina Tirdea addr_buf = kmalloc(len + 2, GFP_KERNEL); 28068caf858SIrina Tirdea if (!addr_buf) 28168caf858SIrina Tirdea return -ENOMEM; 28268caf858SIrina Tirdea 28368caf858SIrina Tirdea addr_buf[0] = reg >> 8; 28468caf858SIrina Tirdea addr_buf[1] = reg & 0xFF; 28568caf858SIrina Tirdea memcpy(&addr_buf[2], buf, len); 28668caf858SIrina Tirdea 28768caf858SIrina Tirdea msg.flags = 0; 28868caf858SIrina Tirdea msg.addr = client->addr; 28968caf858SIrina Tirdea msg.buf = addr_buf; 29068caf858SIrina Tirdea msg.len = len + 2; 29168caf858SIrina Tirdea 29268caf858SIrina Tirdea ret = i2c_transfer(client->adapter, &msg, 1); 29368caf858SIrina Tirdea kfree(addr_buf); 29468caf858SIrina Tirdea return ret < 0 ? ret : (ret != 1 ? -EIO : 0); 29568caf858SIrina Tirdea } 29668caf858SIrina Tirdea 2975ab09d6aSIrina Tirdea static int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value) 2985ab09d6aSIrina Tirdea { 2995ab09d6aSIrina Tirdea return goodix_i2c_write(client, reg, &value, sizeof(value)); 3005ab09d6aSIrina Tirdea } 3015ab09d6aSIrina Tirdea 302cae102e2SIcenowy Zheng static const struct goodix_chip_data *goodix_get_chip_data(const char *id) 303a779fbc6SIrina Tirdea { 304cae102e2SIcenowy Zheng unsigned int i; 30525309004SMarcin Niestroj 306cae102e2SIcenowy Zheng for (i = 0; goodix_chip_ids[i].id; i++) { 307cae102e2SIcenowy Zheng if (!strcmp(goodix_chip_ids[i].id, id)) 308cae102e2SIcenowy Zheng return goodix_chip_ids[i].data; 309a779fbc6SIrina Tirdea } 310cae102e2SIcenowy Zheng 311cae102e2SIcenowy Zheng return >9x_chip_data; 312a779fbc6SIrina Tirdea } 313a779fbc6SIrina Tirdea 314ca96ea86SBastien Nocera static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data) 315ca96ea86SBastien Nocera { 3169b5db7aaSPaul Cercueil unsigned long max_timeout; 317ca96ea86SBastien Nocera int touch_num; 318ca96ea86SBastien Nocera int error; 319492ee52cSDmitry Mastykin u16 addr = GOODIX_READ_COOR_ADDR; 320492ee52cSDmitry Mastykin /* 321492ee52cSDmitry Mastykin * We are going to read 1-byte header, 322492ee52cSDmitry Mastykin * ts->contact_size * max(1, touch_num) bytes of coordinates 323492ee52cSDmitry Mastykin * and 1-byte footer which contains the touch-key code. 324492ee52cSDmitry Mastykin */ 325492ee52cSDmitry Mastykin const int header_contact_keycode_size = 1 + ts->contact_size + 1; 326ca96ea86SBastien Nocera 3279b5db7aaSPaul Cercueil /* 3289b5db7aaSPaul Cercueil * The 'buffer status' bit, which indicates that the data is valid, is 3299b5db7aaSPaul Cercueil * not set as soon as the interrupt is raised, but slightly after. 3309b5db7aaSPaul Cercueil * This takes around 10 ms to happen, so we poll for 20 ms. 3319b5db7aaSPaul Cercueil */ 3329b5db7aaSPaul Cercueil max_timeout = jiffies + msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT); 3339b5db7aaSPaul Cercueil do { 334492ee52cSDmitry Mastykin error = goodix_i2c_read(ts->client, addr, data, 335492ee52cSDmitry Mastykin header_contact_keycode_size); 336ca96ea86SBastien Nocera if (error) { 3379b5db7aaSPaul Cercueil dev_err(&ts->client->dev, "I2C transfer error: %d\n", 3389b5db7aaSPaul Cercueil error); 339ca96ea86SBastien Nocera return error; 340ca96ea86SBastien Nocera } 341ca96ea86SBastien Nocera 3429b5db7aaSPaul Cercueil if (data[0] & GOODIX_BUFFER_STATUS_READY) { 343ca96ea86SBastien Nocera touch_num = data[0] & 0x0f; 344a7ac7c95SAleksei Mamlin if (touch_num > ts->max_touch_num) 345ca96ea86SBastien Nocera return -EPROTO; 346ca96ea86SBastien Nocera 347ca96ea86SBastien Nocera if (touch_num > 1) { 348492ee52cSDmitry Mastykin addr += header_contact_keycode_size; 349492ee52cSDmitry Mastykin data += header_contact_keycode_size; 350ca96ea86SBastien Nocera error = goodix_i2c_read(ts->client, 351492ee52cSDmitry Mastykin addr, data, 352bd3b8480SYauhen Kharuzhy ts->contact_size * 3539b5db7aaSPaul Cercueil (touch_num - 1)); 354ca96ea86SBastien Nocera if (error) 355ca96ea86SBastien Nocera return error; 356ca96ea86SBastien Nocera } 357ca96ea86SBastien Nocera 358ca96ea86SBastien Nocera return touch_num; 359ca96ea86SBastien Nocera } 360ca96ea86SBastien Nocera 3619b5db7aaSPaul Cercueil usleep_range(1000, 2000); /* Poll every 1 - 2 ms */ 3629b5db7aaSPaul Cercueil } while (time_before(jiffies, max_timeout)); 3639b5db7aaSPaul Cercueil 3649b5db7aaSPaul Cercueil /* 3659b5db7aaSPaul Cercueil * The Goodix panel will send spurious interrupts after a 3669b5db7aaSPaul Cercueil * 'finger up' event, which will always cause a timeout. 3679b5db7aaSPaul Cercueil */ 36824ef83f6SDmitry Mastykin return -ENOMSG; 3699b5db7aaSPaul Cercueil } 3709b5db7aaSPaul Cercueil 371bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_8b(struct goodix_ts_data *ts, u8 *coor_data) 372ca96ea86SBastien Nocera { 373ca96ea86SBastien Nocera int id = coor_data[0] & 0x0F; 374ca96ea86SBastien Nocera int input_x = get_unaligned_le16(&coor_data[1]); 375ca96ea86SBastien Nocera int input_y = get_unaligned_le16(&coor_data[3]); 376ca96ea86SBastien Nocera int input_w = get_unaligned_le16(&coor_data[5]); 377ca96ea86SBastien Nocera 378ca96ea86SBastien Nocera input_mt_slot(ts->input_dev, id); 379ca96ea86SBastien Nocera input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 380fafef982SMarcin Niestroj touchscreen_report_pos(ts->input_dev, &ts->prop, 381fafef982SMarcin Niestroj input_x, input_y, true); 382ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 383ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 384ca96ea86SBastien Nocera } 385ca96ea86SBastien Nocera 386bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_9b(struct goodix_ts_data *ts, u8 *coor_data) 387bd3b8480SYauhen Kharuzhy { 388bd3b8480SYauhen Kharuzhy int id = coor_data[1] & 0x0F; 389bd3b8480SYauhen Kharuzhy int input_x = get_unaligned_le16(&coor_data[3]); 390bd3b8480SYauhen Kharuzhy int input_y = get_unaligned_le16(&coor_data[5]); 391bd3b8480SYauhen Kharuzhy int input_w = get_unaligned_le16(&coor_data[7]); 392bd3b8480SYauhen Kharuzhy 393bd3b8480SYauhen Kharuzhy input_mt_slot(ts->input_dev, id); 394bd3b8480SYauhen Kharuzhy input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 395bd3b8480SYauhen Kharuzhy touchscreen_report_pos(ts->input_dev, &ts->prop, 396bd3b8480SYauhen Kharuzhy input_x, input_y, true); 397bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 398bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 399bd3b8480SYauhen Kharuzhy } 400bd3b8480SYauhen Kharuzhy 401492ee52cSDmitry Mastykin static void goodix_ts_report_key(struct goodix_ts_data *ts, u8 *data) 402492ee52cSDmitry Mastykin { 403492ee52cSDmitry Mastykin int touch_num; 404492ee52cSDmitry Mastykin u8 key_value; 405492ee52cSDmitry Mastykin int i; 406492ee52cSDmitry Mastykin 407492ee52cSDmitry Mastykin if (data[0] & GOODIX_HAVE_KEY) { 408492ee52cSDmitry Mastykin touch_num = data[0] & 0x0f; 409492ee52cSDmitry Mastykin key_value = data[1 + ts->contact_size * touch_num]; 410492ee52cSDmitry Mastykin for (i = 0; i < GOODIX_MAX_KEYS; i++) 411492ee52cSDmitry Mastykin if (key_value & BIT(i)) 412492ee52cSDmitry Mastykin input_report_key(ts->input_dev, 413492ee52cSDmitry Mastykin ts->keymap[i], 1); 414492ee52cSDmitry Mastykin } else { 415492ee52cSDmitry Mastykin for (i = 0; i < GOODIX_MAX_KEYS; i++) 416492ee52cSDmitry Mastykin input_report_key(ts->input_dev, ts->keymap[i], 0); 417492ee52cSDmitry Mastykin } 418492ee52cSDmitry Mastykin } 419492ee52cSDmitry Mastykin 420ca96ea86SBastien Nocera /** 421ca96ea86SBastien Nocera * goodix_process_events - Process incoming events 422ca96ea86SBastien Nocera * 423ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 424ca96ea86SBastien Nocera * 425ca96ea86SBastien Nocera * Called when the IRQ is triggered. Read the current device state, and push 426ca96ea86SBastien Nocera * the input events to the user space. 427ca96ea86SBastien Nocera */ 428ca96ea86SBastien Nocera static void goodix_process_events(struct goodix_ts_data *ts) 429ca96ea86SBastien Nocera { 430492ee52cSDmitry Mastykin u8 point_data[2 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS]; 431ca96ea86SBastien Nocera int touch_num; 432ca96ea86SBastien Nocera int i; 433ca96ea86SBastien Nocera 434ca96ea86SBastien Nocera touch_num = goodix_ts_read_input_report(ts, point_data); 435ca96ea86SBastien Nocera if (touch_num < 0) 436ca96ea86SBastien Nocera return; 437ca96ea86SBastien Nocera 438492ee52cSDmitry Mastykin goodix_ts_report_key(ts, point_data); 4394a54feeaSSergei A. Trusov 440ca96ea86SBastien Nocera for (i = 0; i < touch_num; i++) 441bd3b8480SYauhen Kharuzhy if (ts->contact_size == 9) 442bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_9b(ts, 443bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 444bd3b8480SYauhen Kharuzhy else 445bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_8b(ts, 446bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 447ca96ea86SBastien Nocera 448ca96ea86SBastien Nocera input_mt_sync_frame(ts->input_dev); 449ca96ea86SBastien Nocera input_sync(ts->input_dev); 450ca96ea86SBastien Nocera } 451ca96ea86SBastien Nocera 452ca96ea86SBastien Nocera /** 453ca96ea86SBastien Nocera * goodix_ts_irq_handler - The IRQ handler 454ca96ea86SBastien Nocera * 455ca96ea86SBastien Nocera * @irq: interrupt number. 456ca96ea86SBastien Nocera * @dev_id: private data pointer. 457ca96ea86SBastien Nocera */ 458ca96ea86SBastien Nocera static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id) 459ca96ea86SBastien Nocera { 460ca96ea86SBastien Nocera struct goodix_ts_data *ts = dev_id; 461ca96ea86SBastien Nocera 462ca96ea86SBastien Nocera goodix_process_events(ts); 463ca96ea86SBastien Nocera 4645d655b35SIrina Tirdea if (goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0) < 0) 465ca96ea86SBastien Nocera dev_err(&ts->client->dev, "I2C write end_cmd error\n"); 466ca96ea86SBastien Nocera 467ca96ea86SBastien Nocera return IRQ_HANDLED; 468ca96ea86SBastien Nocera } 469ca96ea86SBastien Nocera 4705ab09d6aSIrina Tirdea static void goodix_free_irq(struct goodix_ts_data *ts) 4715ab09d6aSIrina Tirdea { 4725ab09d6aSIrina Tirdea devm_free_irq(&ts->client->dev, ts->client->irq, ts); 4735ab09d6aSIrina Tirdea } 4745ab09d6aSIrina Tirdea 4755ab09d6aSIrina Tirdea static int goodix_request_irq(struct goodix_ts_data *ts) 4765ab09d6aSIrina Tirdea { 4775ab09d6aSIrina Tirdea return devm_request_threaded_irq(&ts->client->dev, ts->client->irq, 4785ab09d6aSIrina Tirdea NULL, goodix_ts_irq_handler, 4795ab09d6aSIrina Tirdea ts->irq_flags, ts->client->name, ts); 4805ab09d6aSIrina Tirdea } 4815ab09d6aSIrina Tirdea 4821a67448fSHans de Goede static int goodix_check_cfg_8(struct goodix_ts_data *ts, const u8 *cfg, int len) 48368caf858SIrina Tirdea { 4841a67448fSHans de Goede int i, raw_cfg_len = len - 2; 48568caf858SIrina Tirdea u8 check_sum = 0; 48668caf858SIrina Tirdea 48768caf858SIrina Tirdea for (i = 0; i < raw_cfg_len; i++) 4881a67448fSHans de Goede check_sum += cfg[i]; 48968caf858SIrina Tirdea check_sum = (~check_sum) + 1; 4901a67448fSHans de Goede if (check_sum != cfg[raw_cfg_len]) { 49168caf858SIrina Tirdea dev_err(&ts->client->dev, 49268caf858SIrina Tirdea "The checksum of the config fw is not correct"); 49368caf858SIrina Tirdea return -EINVAL; 49468caf858SIrina Tirdea } 49568caf858SIrina Tirdea 4961a67448fSHans de Goede if (cfg[raw_cfg_len + 1] != 1) { 49768caf858SIrina Tirdea dev_err(&ts->client->dev, 49868caf858SIrina Tirdea "Config fw must have Config_Fresh register set"); 49968caf858SIrina Tirdea return -EINVAL; 50068caf858SIrina Tirdea } 50168caf858SIrina Tirdea 50268caf858SIrina Tirdea return 0; 50368caf858SIrina Tirdea } 50468caf858SIrina Tirdea 505de956caeSHans de Goede static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts) 506de956caeSHans de Goede { 507de956caeSHans de Goede int i, raw_cfg_len = ts->chip->config_len - 2; 508de956caeSHans de Goede u8 check_sum = 0; 509de956caeSHans de Goede 510de956caeSHans de Goede for (i = 0; i < raw_cfg_len; i++) 511de956caeSHans de Goede check_sum += ts->config[i]; 512de956caeSHans de Goede check_sum = (~check_sum) + 1; 513de956caeSHans de Goede 514de956caeSHans de Goede ts->config[raw_cfg_len] = check_sum; 515de956caeSHans de Goede ts->config[raw_cfg_len + 1] = 1; /* Set "config_fresh" bit */ 516de956caeSHans de Goede } 517de956caeSHans de Goede 5181a67448fSHans de Goede static int goodix_check_cfg_16(struct goodix_ts_data *ts, const u8 *cfg, 5191a67448fSHans de Goede int len) 52025309004SMarcin Niestroj { 5211a67448fSHans de Goede int i, raw_cfg_len = len - 3; 52225309004SMarcin Niestroj u16 check_sum = 0; 52325309004SMarcin Niestroj 52425309004SMarcin Niestroj for (i = 0; i < raw_cfg_len; i += 2) 5251a67448fSHans de Goede check_sum += get_unaligned_be16(&cfg[i]); 52625309004SMarcin Niestroj check_sum = (~check_sum) + 1; 5271a67448fSHans de Goede if (check_sum != get_unaligned_be16(&cfg[raw_cfg_len])) { 52825309004SMarcin Niestroj dev_err(&ts->client->dev, 52925309004SMarcin Niestroj "The checksum of the config fw is not correct"); 53025309004SMarcin Niestroj return -EINVAL; 53125309004SMarcin Niestroj } 53225309004SMarcin Niestroj 5331a67448fSHans de Goede if (cfg[raw_cfg_len + 2] != 1) { 53425309004SMarcin Niestroj dev_err(&ts->client->dev, 53525309004SMarcin Niestroj "Config fw must have Config_Fresh register set"); 53625309004SMarcin Niestroj return -EINVAL; 53725309004SMarcin Niestroj } 53825309004SMarcin Niestroj 53925309004SMarcin Niestroj return 0; 54025309004SMarcin Niestroj } 54125309004SMarcin Niestroj 542de956caeSHans de Goede static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts) 543de956caeSHans de Goede { 544de956caeSHans de Goede int i, raw_cfg_len = ts->chip->config_len - 3; 545de956caeSHans de Goede u16 check_sum = 0; 546de956caeSHans de Goede 547de956caeSHans de Goede for (i = 0; i < raw_cfg_len; i += 2) 548de956caeSHans de Goede check_sum += get_unaligned_be16(&ts->config[i]); 549de956caeSHans de Goede check_sum = (~check_sum) + 1; 550de956caeSHans de Goede 551de956caeSHans de Goede put_unaligned_be16(check_sum, &ts->config[raw_cfg_len]); 552de956caeSHans de Goede ts->config[raw_cfg_len + 2] = 1; /* Set "config_fresh" bit */ 553de956caeSHans de Goede } 554de956caeSHans de Goede 55525309004SMarcin Niestroj /** 55625309004SMarcin Niestroj * goodix_check_cfg - Checks if config fw is valid 55725309004SMarcin Niestroj * 55825309004SMarcin Niestroj * @ts: goodix_ts_data pointer 55925309004SMarcin Niestroj * @cfg: firmware config data 56025309004SMarcin Niestroj */ 5611a67448fSHans de Goede static int goodix_check_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) 56225309004SMarcin Niestroj { 5631a67448fSHans de Goede if (len < GOODIX_CONFIG_MIN_LENGTH || 5641a67448fSHans de Goede len > GOODIX_CONFIG_MAX_LENGTH) { 56525309004SMarcin Niestroj dev_err(&ts->client->dev, 56625309004SMarcin Niestroj "The length of the config fw is not correct"); 56725309004SMarcin Niestroj return -EINVAL; 56825309004SMarcin Niestroj } 56925309004SMarcin Niestroj 5701a67448fSHans de Goede return ts->chip->check_config(ts, cfg, len); 57125309004SMarcin Niestroj } 57225309004SMarcin Niestroj 57368caf858SIrina Tirdea /** 57468caf858SIrina Tirdea * goodix_send_cfg - Write fw config to device 57568caf858SIrina Tirdea * 57668caf858SIrina Tirdea * @ts: goodix_ts_data pointer 57768caf858SIrina Tirdea * @cfg: config firmware to write to device 57868caf858SIrina Tirdea */ 5791a67448fSHans de Goede static int goodix_send_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) 58068caf858SIrina Tirdea { 58168caf858SIrina Tirdea int error; 58268caf858SIrina Tirdea 5831a67448fSHans de Goede error = goodix_check_cfg(ts, cfg, len); 58468caf858SIrina Tirdea if (error) 58568caf858SIrina Tirdea return error; 58668caf858SIrina Tirdea 5871a67448fSHans de Goede error = goodix_i2c_write(ts->client, ts->chip->config_addr, cfg, len); 58868caf858SIrina Tirdea if (error) { 58968caf858SIrina Tirdea dev_err(&ts->client->dev, "Failed to write config data: %d", 59068caf858SIrina Tirdea error); 59168caf858SIrina Tirdea return error; 59268caf858SIrina Tirdea } 59368caf858SIrina Tirdea dev_dbg(&ts->client->dev, "Config sent successfully."); 59468caf858SIrina Tirdea 59568caf858SIrina Tirdea /* Let the firmware reconfigure itself, so sleep for 10ms */ 59668caf858SIrina Tirdea usleep_range(10000, 11000); 59768caf858SIrina Tirdea 59868caf858SIrina Tirdea return 0; 59968caf858SIrina Tirdea } 60068caf858SIrina Tirdea 60149db3997SHans de Goede static int goodix_irq_direction_output(struct goodix_ts_data *ts, 60249db3997SHans de Goede int value) 60349db3997SHans de Goede { 604c5fca485SHans de Goede struct device *dev = &ts->client->dev; 605c5fca485SHans de Goede acpi_status status; 606c5fca485SHans de Goede 60749db3997SHans de Goede switch (ts->irq_pin_access_method) { 60849db3997SHans de Goede case IRQ_PIN_ACCESS_NONE: 60949db3997SHans de Goede dev_err(&ts->client->dev, 61049db3997SHans de Goede "%s called without an irq_pin_access_method set\n", 61149db3997SHans de Goede __func__); 61249db3997SHans de Goede return -EINVAL; 61349db3997SHans de Goede case IRQ_PIN_ACCESS_GPIO: 61449db3997SHans de Goede return gpiod_direction_output(ts->gpiod_int, value); 615a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 616a7d4b171SHans de Goede /* 617a7d4b171SHans de Goede * The IRQ pin triggers on a falling edge, so its gets marked 618a7d4b171SHans de Goede * as active-low, use output_raw to avoid the value inversion. 619a7d4b171SHans de Goede */ 620a7d4b171SHans de Goede return gpiod_direction_output_raw(ts->gpiod_int, value); 621c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 622c5fca485SHans de Goede status = acpi_execute_simple_method(ACPI_HANDLE(dev), 623c5fca485SHans de Goede "INTO", value); 624c5fca485SHans de Goede return ACPI_SUCCESS(status) ? 0 : -EIO; 62549db3997SHans de Goede } 62649db3997SHans de Goede 62749db3997SHans de Goede return -EINVAL; /* Never reached */ 62849db3997SHans de Goede } 62949db3997SHans de Goede 63049db3997SHans de Goede static int goodix_irq_direction_input(struct goodix_ts_data *ts) 63149db3997SHans de Goede { 632c5fca485SHans de Goede struct device *dev = &ts->client->dev; 633c5fca485SHans de Goede acpi_status status; 634c5fca485SHans de Goede 63549db3997SHans de Goede switch (ts->irq_pin_access_method) { 63649db3997SHans de Goede case IRQ_PIN_ACCESS_NONE: 63749db3997SHans de Goede dev_err(&ts->client->dev, 63849db3997SHans de Goede "%s called without an irq_pin_access_method set\n", 63949db3997SHans de Goede __func__); 64049db3997SHans de Goede return -EINVAL; 64149db3997SHans de Goede case IRQ_PIN_ACCESS_GPIO: 642a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 64349db3997SHans de Goede return gpiod_direction_input(ts->gpiod_int); 644c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 645c5fca485SHans de Goede status = acpi_evaluate_object(ACPI_HANDLE(dev), "INTI", 646c5fca485SHans de Goede NULL, NULL); 647c5fca485SHans de Goede return ACPI_SUCCESS(status) ? 0 : -EIO; 64849db3997SHans de Goede } 64949db3997SHans de Goede 65049db3997SHans de Goede return -EINVAL; /* Never reached */ 65149db3997SHans de Goede } 65249db3997SHans de Goede 653ec6e1b40SIrina Tirdea static int goodix_int_sync(struct goodix_ts_data *ts) 654ec6e1b40SIrina Tirdea { 655ec6e1b40SIrina Tirdea int error; 656ec6e1b40SIrina Tirdea 65749db3997SHans de Goede error = goodix_irq_direction_output(ts, 0); 658ec6e1b40SIrina Tirdea if (error) 659ec6e1b40SIrina Tirdea return error; 660ec6e1b40SIrina Tirdea 661ec6e1b40SIrina Tirdea msleep(50); /* T5: 50ms */ 662ec6e1b40SIrina Tirdea 66349db3997SHans de Goede error = goodix_irq_direction_input(ts); 664ec6e1b40SIrina Tirdea if (error) 665ec6e1b40SIrina Tirdea return error; 666ec6e1b40SIrina Tirdea 667ec6e1b40SIrina Tirdea return 0; 668ec6e1b40SIrina Tirdea } 669ec6e1b40SIrina Tirdea 670ec6e1b40SIrina Tirdea /** 671ec6e1b40SIrina Tirdea * goodix_reset - Reset device during power on 672ec6e1b40SIrina Tirdea * 673ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 674ec6e1b40SIrina Tirdea */ 675ec6e1b40SIrina Tirdea static int goodix_reset(struct goodix_ts_data *ts) 676ec6e1b40SIrina Tirdea { 677ec6e1b40SIrina Tirdea int error; 678ec6e1b40SIrina Tirdea 679ec6e1b40SIrina Tirdea /* begin select I2C slave addr */ 680ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 0); 681ec6e1b40SIrina Tirdea if (error) 682ec6e1b40SIrina Tirdea return error; 683ec6e1b40SIrina Tirdea 684ec6e1b40SIrina Tirdea msleep(20); /* T2: > 10ms */ 685ec6e1b40SIrina Tirdea 686ec6e1b40SIrina Tirdea /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */ 68749db3997SHans de Goede error = goodix_irq_direction_output(ts, ts->client->addr == 0x14); 688ec6e1b40SIrina Tirdea if (error) 689ec6e1b40SIrina Tirdea return error; 690ec6e1b40SIrina Tirdea 691ec6e1b40SIrina Tirdea usleep_range(100, 2000); /* T3: > 100us */ 692ec6e1b40SIrina Tirdea 693ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 1); 694ec6e1b40SIrina Tirdea if (error) 695ec6e1b40SIrina Tirdea return error; 696ec6e1b40SIrina Tirdea 697ec6e1b40SIrina Tirdea usleep_range(6000, 10000); /* T4: > 5ms */ 698ec6e1b40SIrina Tirdea 699ec6e1b40SIrina Tirdea /* end select I2C slave addr */ 700ec6e1b40SIrina Tirdea error = gpiod_direction_input(ts->gpiod_rst); 701ec6e1b40SIrina Tirdea if (error) 702ec6e1b40SIrina Tirdea return error; 703ec6e1b40SIrina Tirdea 704ec6e1b40SIrina Tirdea error = goodix_int_sync(ts); 705ec6e1b40SIrina Tirdea if (error) 706ec6e1b40SIrina Tirdea return error; 707ec6e1b40SIrina Tirdea 708ec6e1b40SIrina Tirdea return 0; 709ec6e1b40SIrina Tirdea } 710ec6e1b40SIrina Tirdea 711a7d4b171SHans de Goede #if defined CONFIG_X86 && defined CONFIG_ACPI 71267abd9eeSHans de Goede #include <asm/cpu_device_id.h> 71367abd9eeSHans de Goede #include <asm/intel-family.h> 71467abd9eeSHans de Goede 71567abd9eeSHans de Goede static const struct x86_cpu_id baytrail_cpu_ids[] = { 71667abd9eeSHans de Goede { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT, X86_FEATURE_ANY, }, 71767abd9eeSHans de Goede {} 71867abd9eeSHans de Goede }; 71967abd9eeSHans de Goede 72067abd9eeSHans de Goede static inline bool is_byt(void) 72167abd9eeSHans de Goede { 72267abd9eeSHans de Goede const struct x86_cpu_id *id = x86_match_cpu(baytrail_cpu_ids); 72367abd9eeSHans de Goede 72467abd9eeSHans de Goede return !!id; 72567abd9eeSHans de Goede } 72667abd9eeSHans de Goede 727a7d4b171SHans de Goede static const struct acpi_gpio_params first_gpio = { 0, 0, false }; 728a7d4b171SHans de Goede static const struct acpi_gpio_params second_gpio = { 1, 0, false }; 729a7d4b171SHans de Goede 730a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_first_gpios[] = { 731a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &first_gpio, 1 }, 732a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &second_gpio, 1 }, 733a7d4b171SHans de Goede { }, 734a7d4b171SHans de Goede }; 735a7d4b171SHans de Goede 736a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_last_gpios[] = { 737a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 738a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &second_gpio, 1 }, 739a7d4b171SHans de Goede { }, 740a7d4b171SHans de Goede }; 741a7d4b171SHans de Goede 742c5fca485SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_reset_only_gpios[] = { 743c5fca485SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 744c5fca485SHans de Goede { }, 745c5fca485SHans de Goede }; 746c5fca485SHans de Goede 747a7d4b171SHans de Goede static int goodix_resource(struct acpi_resource *ares, void *data) 748a7d4b171SHans de Goede { 749a7d4b171SHans de Goede struct goodix_ts_data *ts = data; 750a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 751a7d4b171SHans de Goede struct acpi_resource_gpio *gpio; 752a7d4b171SHans de Goede 753a7d4b171SHans de Goede switch (ares->type) { 754a7d4b171SHans de Goede case ACPI_RESOURCE_TYPE_GPIO: 755a7d4b171SHans de Goede gpio = &ares->data.gpio; 756a7d4b171SHans de Goede if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { 757a7d4b171SHans de Goede if (ts->gpio_int_idx == -1) { 758a7d4b171SHans de Goede ts->gpio_int_idx = ts->gpio_count; 759a7d4b171SHans de Goede } else { 760a7d4b171SHans de Goede dev_err(dev, "More then one GpioInt resource, ignoring ACPI GPIO resources\n"); 761a7d4b171SHans de Goede ts->gpio_int_idx = -2; 762a7d4b171SHans de Goede } 763a7d4b171SHans de Goede } 764a7d4b171SHans de Goede ts->gpio_count++; 765a7d4b171SHans de Goede break; 766a7d4b171SHans de Goede default: 767a7d4b171SHans de Goede break; 768a7d4b171SHans de Goede } 769a7d4b171SHans de Goede 770a7d4b171SHans de Goede return 0; 771a7d4b171SHans de Goede } 772a7d4b171SHans de Goede 773a7d4b171SHans de Goede /* 774a7d4b171SHans de Goede * This function gets called in case we fail to get the irq GPIO directly 775a7d4b171SHans de Goede * because the ACPI tables lack GPIO-name to APCI _CRS index mappings 776a7d4b171SHans de Goede * (no _DSD UUID daffd814-6eba-4d8c-8a91-bc9bbf4aa301 data). 777a7d4b171SHans de Goede * In that case we add our own mapping and then goodix_get_gpio_config() 778a7d4b171SHans de Goede * retries to get the GPIOs based on the added mapping. 779a7d4b171SHans de Goede */ 780a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 781a7d4b171SHans de Goede { 782a7d4b171SHans de Goede const struct acpi_gpio_mapping *gpio_mapping = NULL; 783a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 784a7d4b171SHans de Goede LIST_HEAD(resources); 785a7d4b171SHans de Goede int ret; 786a7d4b171SHans de Goede 787a7d4b171SHans de Goede ts->gpio_count = 0; 788a7d4b171SHans de Goede ts->gpio_int_idx = -1; 789a7d4b171SHans de Goede ret = acpi_dev_get_resources(ACPI_COMPANION(dev), &resources, 790a7d4b171SHans de Goede goodix_resource, ts); 791a7d4b171SHans de Goede if (ret < 0) { 792a7d4b171SHans de Goede dev_err(dev, "Error getting ACPI resources: %d\n", ret); 793a7d4b171SHans de Goede return ret; 794a7d4b171SHans de Goede } 795a7d4b171SHans de Goede 796a7d4b171SHans de Goede acpi_dev_free_resource_list(&resources); 797a7d4b171SHans de Goede 798a7d4b171SHans de Goede if (ts->gpio_count == 2 && ts->gpio_int_idx == 0) { 799a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 800a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_first_gpios; 801a7d4b171SHans de Goede } else if (ts->gpio_count == 2 && ts->gpio_int_idx == 1) { 802a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 803a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_last_gpios; 804c5fca485SHans de Goede } else if (ts->gpio_count == 1 && ts->gpio_int_idx == -1 && 805c5fca485SHans de Goede acpi_has_method(ACPI_HANDLE(dev), "INTI") && 806c5fca485SHans de Goede acpi_has_method(ACPI_HANDLE(dev), "INTO")) { 807c5fca485SHans de Goede dev_info(dev, "Using ACPI INTI and INTO methods for IRQ pin access\n"); 808c5fca485SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_METHOD; 809c5fca485SHans de Goede gpio_mapping = acpi_goodix_reset_only_gpios; 81067abd9eeSHans de Goede } else if (is_byt() && ts->gpio_count == 2 && ts->gpio_int_idx == -1) { 81167abd9eeSHans de Goede dev_info(dev, "No ACPI GpioInt resource, assuming that the GPIO order is reset, int\n"); 81267abd9eeSHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 81367abd9eeSHans de Goede gpio_mapping = acpi_goodix_int_last_gpios; 814a7d4b171SHans de Goede } else { 815a7d4b171SHans de Goede dev_warn(dev, "Unexpected ACPI resources: gpio_count %d, gpio_int_idx %d\n", 816a7d4b171SHans de Goede ts->gpio_count, ts->gpio_int_idx); 817a7d4b171SHans de Goede return -EINVAL; 818a7d4b171SHans de Goede } 819a7d4b171SHans de Goede 820a7d4b171SHans de Goede return devm_acpi_dev_add_driver_gpios(dev, gpio_mapping); 821a7d4b171SHans de Goede } 822a7d4b171SHans de Goede #else 823a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 824a7d4b171SHans de Goede { 825a7d4b171SHans de Goede return -EINVAL; 826a7d4b171SHans de Goede } 827a7d4b171SHans de Goede #endif /* CONFIG_X86 && CONFIG_ACPI */ 828a7d4b171SHans de Goede 829ec6e1b40SIrina Tirdea /** 830ec6e1b40SIrina Tirdea * goodix_get_gpio_config - Get GPIO config from ACPI/DT 831ec6e1b40SIrina Tirdea * 832ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 833ec6e1b40SIrina Tirdea */ 834ec6e1b40SIrina Tirdea static int goodix_get_gpio_config(struct goodix_ts_data *ts) 835ec6e1b40SIrina Tirdea { 836ec6e1b40SIrina Tirdea int error; 837ec6e1b40SIrina Tirdea struct device *dev; 838ec6e1b40SIrina Tirdea struct gpio_desc *gpiod; 839a7d4b171SHans de Goede bool added_acpi_mappings = false; 840ec6e1b40SIrina Tirdea 841ec6e1b40SIrina Tirdea if (!ts->client) 842ec6e1b40SIrina Tirdea return -EINVAL; 843ec6e1b40SIrina Tirdea dev = &ts->client->dev; 844ec6e1b40SIrina Tirdea 845ae97fb58SJagan Teki ts->avdd28 = devm_regulator_get(dev, "AVDD28"); 846ae97fb58SJagan Teki if (IS_ERR(ts->avdd28)) { 847ae97fb58SJagan Teki error = PTR_ERR(ts->avdd28); 848ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 849ae97fb58SJagan Teki dev_err(dev, 850ae97fb58SJagan Teki "Failed to get AVDD28 regulator: %d\n", error); 851ae97fb58SJagan Teki return error; 852ae97fb58SJagan Teki } 853ae97fb58SJagan Teki 854ae97fb58SJagan Teki ts->vddio = devm_regulator_get(dev, "VDDIO"); 855ae97fb58SJagan Teki if (IS_ERR(ts->vddio)) { 856ae97fb58SJagan Teki error = PTR_ERR(ts->vddio); 857ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 858ae97fb58SJagan Teki dev_err(dev, 859ae97fb58SJagan Teki "Failed to get VDDIO regulator: %d\n", error); 860ae97fb58SJagan Teki return error; 861ae97fb58SJagan Teki } 862ae97fb58SJagan Teki 863a7d4b171SHans de Goede retry_get_irq_gpio: 864ec6e1b40SIrina Tirdea /* Get the interrupt GPIO pin number */ 865ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN); 866ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 867ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 868ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 869ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 870ec6e1b40SIrina Tirdea GOODIX_GPIO_INT_NAME, error); 871ec6e1b40SIrina Tirdea return error; 872ec6e1b40SIrina Tirdea } 873a7d4b171SHans de Goede if (!gpiod && has_acpi_companion(dev) && !added_acpi_mappings) { 874a7d4b171SHans de Goede added_acpi_mappings = true; 875a7d4b171SHans de Goede if (goodix_add_acpi_gpio_mappings(ts) == 0) 876a7d4b171SHans de Goede goto retry_get_irq_gpio; 877a7d4b171SHans de Goede } 878ec6e1b40SIrina Tirdea 879ec6e1b40SIrina Tirdea ts->gpiod_int = gpiod; 880ec6e1b40SIrina Tirdea 881ec6e1b40SIrina Tirdea /* Get the reset line GPIO pin number */ 882ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, GPIOD_IN); 883ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 884ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 885ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 886ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 887ec6e1b40SIrina Tirdea GOODIX_GPIO_RST_NAME, error); 888ec6e1b40SIrina Tirdea return error; 889ec6e1b40SIrina Tirdea } 890ec6e1b40SIrina Tirdea 891ec6e1b40SIrina Tirdea ts->gpiod_rst = gpiod; 892ec6e1b40SIrina Tirdea 893a7d4b171SHans de Goede switch (ts->irq_pin_access_method) { 894a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 895a7d4b171SHans de Goede /* 896a7d4b171SHans de Goede * We end up here if goodix_add_acpi_gpio_mappings() has 897a7d4b171SHans de Goede * called devm_acpi_dev_add_driver_gpios() because the ACPI 898a7d4b171SHans de Goede * tables did not contain name to index mappings. 899a7d4b171SHans de Goede * Check that we successfully got both GPIOs after we've 900a7d4b171SHans de Goede * added our own acpi_gpio_mapping and if we did not get both 901a7d4b171SHans de Goede * GPIOs reset irq_pin_access_method to IRQ_PIN_ACCESS_NONE. 902a7d4b171SHans de Goede */ 903a7d4b171SHans de Goede if (!ts->gpiod_int || !ts->gpiod_rst) 904a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 905a7d4b171SHans de Goede break; 906c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 907c5fca485SHans de Goede if (!ts->gpiod_rst) 908c5fca485SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 909c5fca485SHans de Goede break; 910a7d4b171SHans de Goede default: 911e070a97bSHans de Goede if (ts->gpiod_int && ts->gpiod_rst) { 9121921daceSHans de Goede ts->reset_controller_at_probe = true; 913e070a97bSHans de Goede ts->load_cfg_from_disk = true; 91449db3997SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_GPIO; 915e070a97bSHans de Goede } 916a7d4b171SHans de Goede } 91749db3997SHans de Goede 918ec6e1b40SIrina Tirdea return 0; 919ec6e1b40SIrina Tirdea } 920ec6e1b40SIrina Tirdea 921ca96ea86SBastien Nocera /** 922ca96ea86SBastien Nocera * goodix_read_config - Read the embedded configuration of the panel 923ca96ea86SBastien Nocera * 924ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 925ca96ea86SBastien Nocera * 926ca96ea86SBastien Nocera * Must be called during probe 927ca96ea86SBastien Nocera */ 928ca96ea86SBastien Nocera static void goodix_read_config(struct goodix_ts_data *ts) 929ca96ea86SBastien Nocera { 930fafef982SMarcin Niestroj int x_max, y_max; 931ca96ea86SBastien Nocera int error; 932ca96ea86SBastien Nocera 93325309004SMarcin Niestroj error = goodix_i2c_read(ts->client, ts->chip->config_addr, 934de956caeSHans de Goede ts->config, ts->chip->config_len); 935ca96ea86SBastien Nocera if (error) { 936fafef982SMarcin Niestroj dev_warn(&ts->client->dev, "Error reading config: %d\n", 937ca96ea86SBastien Nocera error); 938ca96ea86SBastien Nocera ts->int_trigger_type = GOODIX_INT_TRIGGER; 939a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 940ca96ea86SBastien Nocera return; 941ca96ea86SBastien Nocera } 942ca96ea86SBastien Nocera 943de956caeSHans de Goede ts->int_trigger_type = ts->config[TRIGGER_LOC] & 0x03; 944de956caeSHans de Goede ts->max_touch_num = ts->config[MAX_CONTACTS_LOC] & 0x0f; 9458b5a359cSBastien Nocera 946de956caeSHans de Goede x_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC]); 947de956caeSHans de Goede y_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC + 2]); 948fafef982SMarcin Niestroj if (x_max && y_max) { 949fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_X, x_max - 1); 950fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_Y, y_max - 1); 951ca96ea86SBastien Nocera } 952de956caeSHans de Goede 953de956caeSHans de Goede ts->chip->calc_config_checksum(ts); 95457c80e8eSKarsten Merker } 955ca96ea86SBastien Nocera 956ca96ea86SBastien Nocera /** 957ca96ea86SBastien Nocera * goodix_read_version - Read goodix touchscreen version 958ca96ea86SBastien Nocera * 95968caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 960ca96ea86SBastien Nocera */ 96168caf858SIrina Tirdea static int goodix_read_version(struct goodix_ts_data *ts) 962ca96ea86SBastien Nocera { 963ca96ea86SBastien Nocera int error; 964ca96ea86SBastien Nocera u8 buf[6]; 965cae102e2SIcenowy Zheng char id_str[GOODIX_ID_MAX_LEN + 1]; 966ca96ea86SBastien Nocera 96768caf858SIrina Tirdea error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf)); 968ca96ea86SBastien Nocera if (error) { 96968caf858SIrina Tirdea dev_err(&ts->client->dev, "read version failed: %d\n", error); 970ca96ea86SBastien Nocera return error; 971ca96ea86SBastien Nocera } 972ca96ea86SBastien Nocera 973cae102e2SIcenowy Zheng memcpy(id_str, buf, GOODIX_ID_MAX_LEN); 974cae102e2SIcenowy Zheng id_str[GOODIX_ID_MAX_LEN] = 0; 975cae102e2SIcenowy Zheng strscpy(ts->id, id_str, GOODIX_ID_MAX_LEN + 1); 976e70b0307SIrina Tirdea 97768caf858SIrina Tirdea ts->version = get_unaligned_le16(&buf[4]); 978ca96ea86SBastien Nocera 979cae102e2SIcenowy Zheng dev_info(&ts->client->dev, "ID %s, version: %04x\n", ts->id, 98068caf858SIrina Tirdea ts->version); 981ca96ea86SBastien Nocera 982ca96ea86SBastien Nocera return 0; 983ca96ea86SBastien Nocera } 984ca96ea86SBastien Nocera 985ca96ea86SBastien Nocera /** 986ca96ea86SBastien Nocera * goodix_i2c_test - I2C test function to check if the device answers. 987ca96ea86SBastien Nocera * 988ca96ea86SBastien Nocera * @client: the i2c client 989ca96ea86SBastien Nocera */ 990ca96ea86SBastien Nocera static int goodix_i2c_test(struct i2c_client *client) 991ca96ea86SBastien Nocera { 992ca96ea86SBastien Nocera int retry = 0; 993ca96ea86SBastien Nocera int error; 994ca96ea86SBastien Nocera u8 test; 995ca96ea86SBastien Nocera 996ca96ea86SBastien Nocera while (retry++ < 2) { 99725309004SMarcin Niestroj error = goodix_i2c_read(client, GOODIX_REG_ID, 998ca96ea86SBastien Nocera &test, 1); 999ca96ea86SBastien Nocera if (!error) 1000ca96ea86SBastien Nocera return 0; 1001ca96ea86SBastien Nocera 1002ca96ea86SBastien Nocera dev_err(&client->dev, "i2c test failed attempt %d: %d\n", 1003ca96ea86SBastien Nocera retry, error); 1004ca96ea86SBastien Nocera msleep(20); 1005ca96ea86SBastien Nocera } 1006ca96ea86SBastien Nocera 1007ca96ea86SBastien Nocera return error; 1008ca96ea86SBastien Nocera } 1009ca96ea86SBastien Nocera 1010ca96ea86SBastien Nocera /** 101168caf858SIrina Tirdea * goodix_configure_dev - Finish device initialization 101268caf858SIrina Tirdea * 101368caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 101468caf858SIrina Tirdea * 101568caf858SIrina Tirdea * Must be called from probe to finish initialization of the device. 101668caf858SIrina Tirdea * Contains the common initialization code for both devices that 101768caf858SIrina Tirdea * declare gpio pins and devices that do not. It is either called 101868caf858SIrina Tirdea * directly from probe or from request_firmware_wait callback. 101968caf858SIrina Tirdea */ 102068caf858SIrina Tirdea static int goodix_configure_dev(struct goodix_ts_data *ts) 102168caf858SIrina Tirdea { 102268caf858SIrina Tirdea int error; 1023492ee52cSDmitry Mastykin int i; 102468caf858SIrina Tirdea 1025fafef982SMarcin Niestroj ts->int_trigger_type = GOODIX_INT_TRIGGER; 1026fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 1027ad48cf5eSKarsten Merker 1028fafef982SMarcin Niestroj ts->input_dev = devm_input_allocate_device(&ts->client->dev); 1029fafef982SMarcin Niestroj if (!ts->input_dev) { 1030fafef982SMarcin Niestroj dev_err(&ts->client->dev, "Failed to allocate input device."); 1031fafef982SMarcin Niestroj return -ENOMEM; 1032fafef982SMarcin Niestroj } 1033fafef982SMarcin Niestroj 1034fafef982SMarcin Niestroj ts->input_dev->name = "Goodix Capacitive TouchScreen"; 1035fafef982SMarcin Niestroj ts->input_dev->phys = "input/ts"; 1036fafef982SMarcin Niestroj ts->input_dev->id.bustype = BUS_I2C; 1037fafef982SMarcin Niestroj ts->input_dev->id.vendor = 0x0416; 1038cae102e2SIcenowy Zheng if (kstrtou16(ts->id, 10, &ts->input_dev->id.product)) 1039cae102e2SIcenowy Zheng ts->input_dev->id.product = 0x1001; 1040fafef982SMarcin Niestroj ts->input_dev->id.version = ts->version; 1041fafef982SMarcin Niestroj 1042492ee52cSDmitry Mastykin ts->input_dev->keycode = ts->keymap; 1043492ee52cSDmitry Mastykin ts->input_dev->keycodesize = sizeof(ts->keymap[0]); 1044492ee52cSDmitry Mastykin ts->input_dev->keycodemax = GOODIX_MAX_KEYS; 1045492ee52cSDmitry Mastykin 1046fafef982SMarcin Niestroj /* Capacitive Windows/Home button on some devices */ 1047492ee52cSDmitry Mastykin for (i = 0; i < GOODIX_MAX_KEYS; ++i) { 1048492ee52cSDmitry Mastykin if (i == 0) 1049492ee52cSDmitry Mastykin ts->keymap[i] = KEY_LEFTMETA; 1050492ee52cSDmitry Mastykin else 1051492ee52cSDmitry Mastykin ts->keymap[i] = KEY_F1 + (i - 1); 1052492ee52cSDmitry Mastykin 1053492ee52cSDmitry Mastykin input_set_capability(ts->input_dev, EV_KEY, ts->keymap[i]); 1054492ee52cSDmitry Mastykin } 1055fafef982SMarcin Niestroj 1056fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X); 1057fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y); 1058fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 1059fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 1060fafef982SMarcin Niestroj 1061fafef982SMarcin Niestroj /* Read configuration and apply touchscreen parameters */ 106268caf858SIrina Tirdea goodix_read_config(ts); 106368caf858SIrina Tirdea 1064fafef982SMarcin Niestroj /* Try overriding touchscreen parameters via device properties */ 1065fafef982SMarcin Niestroj touchscreen_parse_properties(ts->input_dev, true, &ts->prop); 1066fafef982SMarcin Niestroj 1067fafef982SMarcin Niestroj if (!ts->prop.max_x || !ts->prop.max_y || !ts->max_touch_num) { 1068c1c00aa5SGuido Günther dev_err(&ts->client->dev, 1069c1c00aa5SGuido Günther "Invalid config (%d, %d, %d), using defaults\n", 1070c1c00aa5SGuido Günther ts->prop.max_x, ts->prop.max_y, ts->max_touch_num); 1071fafef982SMarcin Niestroj ts->prop.max_x = GOODIX_MAX_WIDTH - 1; 1072fafef982SMarcin Niestroj ts->prop.max_y = GOODIX_MAX_HEIGHT - 1; 1073fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 1074fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 1075fafef982SMarcin Niestroj ABS_MT_POSITION_X, ts->prop.max_x); 1076fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 1077fafef982SMarcin Niestroj ABS_MT_POSITION_Y, ts->prop.max_y); 1078fafef982SMarcin Niestroj } 1079fafef982SMarcin Niestroj 1080fafef982SMarcin Niestroj if (dmi_check_system(rotated_screen)) { 1081fafef982SMarcin Niestroj ts->prop.invert_x = true; 1082fafef982SMarcin Niestroj ts->prop.invert_y = true; 1083fafef982SMarcin Niestroj dev_dbg(&ts->client->dev, 1084fafef982SMarcin Niestroj "Applying '180 degrees rotated screen' quirk\n"); 1085fafef982SMarcin Niestroj } 1086fafef982SMarcin Niestroj 1087bd3b8480SYauhen Kharuzhy if (dmi_check_system(nine_bytes_report)) { 1088bd3b8480SYauhen Kharuzhy ts->contact_size = 9; 1089bd3b8480SYauhen Kharuzhy 1090bd3b8480SYauhen Kharuzhy dev_dbg(&ts->client->dev, 1091bd3b8480SYauhen Kharuzhy "Non-standard 9-bytes report format quirk\n"); 1092bd3b8480SYauhen Kharuzhy } 1093bd3b8480SYauhen Kharuzhy 10941dd5ddc1SSergei A. Trusov if (dmi_check_system(inverted_x_screen)) { 10951dd5ddc1SSergei A. Trusov ts->prop.invert_x = true; 10961dd5ddc1SSergei A. Trusov dev_dbg(&ts->client->dev, 10971dd5ddc1SSergei A. Trusov "Applying 'inverted x screen' quirk\n"); 10981dd5ddc1SSergei A. Trusov } 10991dd5ddc1SSergei A. Trusov 1100fafef982SMarcin Niestroj error = input_mt_init_slots(ts->input_dev, ts->max_touch_num, 1101fafef982SMarcin Niestroj INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); 1102fafef982SMarcin Niestroj if (error) { 1103fafef982SMarcin Niestroj dev_err(&ts->client->dev, 1104fafef982SMarcin Niestroj "Failed to initialize MT slots: %d", error); 110568caf858SIrina Tirdea return error; 1106fafef982SMarcin Niestroj } 1107fafef982SMarcin Niestroj 1108fafef982SMarcin Niestroj error = input_register_device(ts->input_dev); 1109fafef982SMarcin Niestroj if (error) { 1110fafef982SMarcin Niestroj dev_err(&ts->client->dev, 1111fafef982SMarcin Niestroj "Failed to register input device: %d", error); 1112fafef982SMarcin Niestroj return error; 1113fafef982SMarcin Niestroj } 111468caf858SIrina Tirdea 11155ab09d6aSIrina Tirdea ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT; 11165ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 111768caf858SIrina Tirdea if (error) { 111868caf858SIrina Tirdea dev_err(&ts->client->dev, "request IRQ failed: %d\n", error); 111968caf858SIrina Tirdea return error; 112068caf858SIrina Tirdea } 112168caf858SIrina Tirdea 112268caf858SIrina Tirdea return 0; 112368caf858SIrina Tirdea } 112468caf858SIrina Tirdea 112568caf858SIrina Tirdea /** 112668caf858SIrina Tirdea * goodix_config_cb - Callback to finish device init 112768caf858SIrina Tirdea * 112868caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 112968caf858SIrina Tirdea * 113068caf858SIrina Tirdea * request_firmware_wait callback that finishes 113168caf858SIrina Tirdea * initialization of the device. 113268caf858SIrina Tirdea */ 113368caf858SIrina Tirdea static void goodix_config_cb(const struct firmware *cfg, void *ctx) 113468caf858SIrina Tirdea { 113568caf858SIrina Tirdea struct goodix_ts_data *ts = ctx; 113668caf858SIrina Tirdea int error; 113768caf858SIrina Tirdea 113868caf858SIrina Tirdea if (cfg) { 113968caf858SIrina Tirdea /* send device configuration to the firmware */ 11401a67448fSHans de Goede error = goodix_send_cfg(ts, cfg->data, cfg->size); 114168caf858SIrina Tirdea if (error) 114268caf858SIrina Tirdea goto err_release_cfg; 114368caf858SIrina Tirdea } 114468caf858SIrina Tirdea 114568caf858SIrina Tirdea goodix_configure_dev(ts); 114668caf858SIrina Tirdea 114768caf858SIrina Tirdea err_release_cfg: 114868caf858SIrina Tirdea release_firmware(cfg); 114968caf858SIrina Tirdea complete_all(&ts->firmware_loading_complete); 115068caf858SIrina Tirdea } 115168caf858SIrina Tirdea 1152ae97fb58SJagan Teki static void goodix_disable_regulators(void *arg) 1153ae97fb58SJagan Teki { 1154ae97fb58SJagan Teki struct goodix_ts_data *ts = arg; 1155ae97fb58SJagan Teki 1156ae97fb58SJagan Teki regulator_disable(ts->vddio); 1157ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1158ae97fb58SJagan Teki } 1159ae97fb58SJagan Teki 1160ca96ea86SBastien Nocera static int goodix_ts_probe(struct i2c_client *client, 1161ca96ea86SBastien Nocera const struct i2c_device_id *id) 1162ca96ea86SBastien Nocera { 1163ca96ea86SBastien Nocera struct goodix_ts_data *ts; 1164ca96ea86SBastien Nocera int error; 1165ca96ea86SBastien Nocera 1166ca96ea86SBastien Nocera dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr); 1167ca96ea86SBastien Nocera 1168ca96ea86SBastien Nocera if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 1169ca96ea86SBastien Nocera dev_err(&client->dev, "I2C check functionality failed.\n"); 1170ca96ea86SBastien Nocera return -ENXIO; 1171ca96ea86SBastien Nocera } 1172ca96ea86SBastien Nocera 1173ca96ea86SBastien Nocera ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); 1174ca96ea86SBastien Nocera if (!ts) 1175ca96ea86SBastien Nocera return -ENOMEM; 1176ca96ea86SBastien Nocera 1177ca96ea86SBastien Nocera ts->client = client; 1178ca96ea86SBastien Nocera i2c_set_clientdata(client, ts); 117968caf858SIrina Tirdea init_completion(&ts->firmware_loading_complete); 1180bd3b8480SYauhen Kharuzhy ts->contact_size = GOODIX_CONTACT_SIZE; 1181ca96ea86SBastien Nocera 1182ec6e1b40SIrina Tirdea error = goodix_get_gpio_config(ts); 1183ec6e1b40SIrina Tirdea if (error) 1184ec6e1b40SIrina Tirdea return error; 1185ec6e1b40SIrina Tirdea 1186ae97fb58SJagan Teki /* power up the controller */ 1187ae97fb58SJagan Teki error = regulator_enable(ts->avdd28); 1188ae97fb58SJagan Teki if (error) { 1189ae97fb58SJagan Teki dev_err(&client->dev, 1190ae97fb58SJagan Teki "Failed to enable AVDD28 regulator: %d\n", 1191ae97fb58SJagan Teki error); 1192ae97fb58SJagan Teki return error; 1193ae97fb58SJagan Teki } 1194ae97fb58SJagan Teki 1195ae97fb58SJagan Teki error = regulator_enable(ts->vddio); 1196ae97fb58SJagan Teki if (error) { 1197ae97fb58SJagan Teki dev_err(&client->dev, 1198ae97fb58SJagan Teki "Failed to enable VDDIO regulator: %d\n", 1199ae97fb58SJagan Teki error); 1200ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1201ae97fb58SJagan Teki return error; 1202ae97fb58SJagan Teki } 1203ae97fb58SJagan Teki 1204ae97fb58SJagan Teki error = devm_add_action_or_reset(&client->dev, 1205ae97fb58SJagan Teki goodix_disable_regulators, ts); 1206ae97fb58SJagan Teki if (error) 1207ae97fb58SJagan Teki return error; 1208ae97fb58SJagan Teki 12099e1f2d70SHans de Goede reset: 12101921daceSHans de Goede if (ts->reset_controller_at_probe) { 1211ec6e1b40SIrina Tirdea /* reset the controller */ 1212ec6e1b40SIrina Tirdea error = goodix_reset(ts); 1213ec6e1b40SIrina Tirdea if (error) { 1214ec6e1b40SIrina Tirdea dev_err(&client->dev, "Controller reset failed.\n"); 1215ec6e1b40SIrina Tirdea return error; 1216ec6e1b40SIrina Tirdea } 1217ec6e1b40SIrina Tirdea } 1218ec6e1b40SIrina Tirdea 1219ca96ea86SBastien Nocera error = goodix_i2c_test(client); 1220ca96ea86SBastien Nocera if (error) { 12219e1f2d70SHans de Goede if (!ts->reset_controller_at_probe && 12229e1f2d70SHans de Goede ts->irq_pin_access_method != IRQ_PIN_ACCESS_NONE) { 12239e1f2d70SHans de Goede /* Retry after a controller reset */ 12249e1f2d70SHans de Goede ts->reset_controller_at_probe = true; 12259e1f2d70SHans de Goede goto reset; 12269e1f2d70SHans de Goede } 1227ca96ea86SBastien Nocera dev_err(&client->dev, "I2C communication failure: %d\n", error); 1228ca96ea86SBastien Nocera return error; 1229ca96ea86SBastien Nocera } 1230ca96ea86SBastien Nocera 123168caf858SIrina Tirdea error = goodix_read_version(ts); 1232ca96ea86SBastien Nocera if (error) { 1233ca96ea86SBastien Nocera dev_err(&client->dev, "Read version failed.\n"); 1234ca96ea86SBastien Nocera return error; 1235ca96ea86SBastien Nocera } 1236ca96ea86SBastien Nocera 123725309004SMarcin Niestroj ts->chip = goodix_get_chip_data(ts->id); 1238a779fbc6SIrina Tirdea 1239e070a97bSHans de Goede if (ts->load_cfg_from_disk) { 124068caf858SIrina Tirdea /* update device config */ 124168caf858SIrina Tirdea ts->cfg_name = devm_kasprintf(&client->dev, GFP_KERNEL, 1242cae102e2SIcenowy Zheng "goodix_%s_cfg.bin", ts->id); 124368caf858SIrina Tirdea if (!ts->cfg_name) 124468caf858SIrina Tirdea return -ENOMEM; 1245ca96ea86SBastien Nocera 124668caf858SIrina Tirdea error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name, 124768caf858SIrina Tirdea &client->dev, GFP_KERNEL, ts, 124868caf858SIrina Tirdea goodix_config_cb); 1249ca96ea86SBastien Nocera if (error) { 125068caf858SIrina Tirdea dev_err(&client->dev, 125168caf858SIrina Tirdea "Failed to invoke firmware loader: %d\n", 125268caf858SIrina Tirdea error); 1253ca96ea86SBastien Nocera return error; 1254ca96ea86SBastien Nocera } 1255ca96ea86SBastien Nocera 1256ca96ea86SBastien Nocera return 0; 125768caf858SIrina Tirdea } else { 125868caf858SIrina Tirdea error = goodix_configure_dev(ts); 125968caf858SIrina Tirdea if (error) 126068caf858SIrina Tirdea return error; 126168caf858SIrina Tirdea } 126268caf858SIrina Tirdea 126368caf858SIrina Tirdea return 0; 126468caf858SIrina Tirdea } 126568caf858SIrina Tirdea 126668caf858SIrina Tirdea static int goodix_ts_remove(struct i2c_client *client) 126768caf858SIrina Tirdea { 126868caf858SIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 126968caf858SIrina Tirdea 1270e070a97bSHans de Goede if (ts->load_cfg_from_disk) 127168caf858SIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 127268caf858SIrina Tirdea 127368caf858SIrina Tirdea return 0; 1274ca96ea86SBastien Nocera } 1275ca96ea86SBastien Nocera 12765ab09d6aSIrina Tirdea static int __maybe_unused goodix_suspend(struct device *dev) 12775ab09d6aSIrina Tirdea { 12785ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 12795ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 12805ab09d6aSIrina Tirdea int error; 12815ab09d6aSIrina Tirdea 1282e070a97bSHans de Goede if (ts->load_cfg_from_disk) 1283e070a97bSHans de Goede wait_for_completion(&ts->firmware_loading_complete); 1284e070a97bSHans de Goede 12855ab09d6aSIrina Tirdea /* We need gpio pins to suspend/resume */ 128649db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1287faec44b6SHans de Goede disable_irq(client->irq); 12885ab09d6aSIrina Tirdea return 0; 1289faec44b6SHans de Goede } 12905ab09d6aSIrina Tirdea 12915ab09d6aSIrina Tirdea /* Free IRQ as IRQ pin is used as output in the suspend sequence */ 12925ab09d6aSIrina Tirdea goodix_free_irq(ts); 12935ab09d6aSIrina Tirdea 12945ab09d6aSIrina Tirdea /* Output LOW on the INT pin for 5 ms */ 129549db3997SHans de Goede error = goodix_irq_direction_output(ts, 0); 12965ab09d6aSIrina Tirdea if (error) { 12975ab09d6aSIrina Tirdea goodix_request_irq(ts); 12985ab09d6aSIrina Tirdea return error; 12995ab09d6aSIrina Tirdea } 13005ab09d6aSIrina Tirdea 13015ab09d6aSIrina Tirdea usleep_range(5000, 6000); 13025ab09d6aSIrina Tirdea 13035ab09d6aSIrina Tirdea error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND, 13045ab09d6aSIrina Tirdea GOODIX_CMD_SCREEN_OFF); 13055ab09d6aSIrina Tirdea if (error) { 13065ab09d6aSIrina Tirdea dev_err(&ts->client->dev, "Screen off command failed\n"); 130749db3997SHans de Goede goodix_irq_direction_input(ts); 13085ab09d6aSIrina Tirdea goodix_request_irq(ts); 13095ab09d6aSIrina Tirdea return -EAGAIN; 13105ab09d6aSIrina Tirdea } 13115ab09d6aSIrina Tirdea 13125ab09d6aSIrina Tirdea /* 13135ab09d6aSIrina Tirdea * The datasheet specifies that the interval between sending screen-off 13145ab09d6aSIrina Tirdea * command and wake-up should be longer than 58 ms. To avoid waking up 13155ab09d6aSIrina Tirdea * sooner, delay 58ms here. 13165ab09d6aSIrina Tirdea */ 13175ab09d6aSIrina Tirdea msleep(58); 13185ab09d6aSIrina Tirdea return 0; 13195ab09d6aSIrina Tirdea } 13205ab09d6aSIrina Tirdea 13215ab09d6aSIrina Tirdea static int __maybe_unused goodix_resume(struct device *dev) 13225ab09d6aSIrina Tirdea { 13235ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 13245ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 1325273ec6bdSHans de Goede u8 config_ver; 13265ab09d6aSIrina Tirdea int error; 13275ab09d6aSIrina Tirdea 132849db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1329faec44b6SHans de Goede enable_irq(client->irq); 13305ab09d6aSIrina Tirdea return 0; 1331faec44b6SHans de Goede } 13325ab09d6aSIrina Tirdea 13335ab09d6aSIrina Tirdea /* 13345ab09d6aSIrina Tirdea * Exit sleep mode by outputting HIGH level to INT pin 13355ab09d6aSIrina Tirdea * for 2ms~5ms. 13365ab09d6aSIrina Tirdea */ 133749db3997SHans de Goede error = goodix_irq_direction_output(ts, 1); 13385ab09d6aSIrina Tirdea if (error) 13395ab09d6aSIrina Tirdea return error; 13405ab09d6aSIrina Tirdea 13415ab09d6aSIrina Tirdea usleep_range(2000, 5000); 13425ab09d6aSIrina Tirdea 13435ab09d6aSIrina Tirdea error = goodix_int_sync(ts); 13445ab09d6aSIrina Tirdea if (error) 13455ab09d6aSIrina Tirdea return error; 13465ab09d6aSIrina Tirdea 1347273ec6bdSHans de Goede error = goodix_i2c_read(ts->client, ts->chip->config_addr, 1348273ec6bdSHans de Goede &config_ver, 1); 1349273ec6bdSHans de Goede if (error) 1350273ec6bdSHans de Goede dev_warn(dev, "Error reading config version: %d, resetting controller\n", 1351273ec6bdSHans de Goede error); 1352273ec6bdSHans de Goede else if (config_ver != ts->config[0]) 1353273ec6bdSHans de Goede dev_info(dev, "Config version mismatch %d != %d, resetting controller\n", 1354273ec6bdSHans de Goede config_ver, ts->config[0]); 1355273ec6bdSHans de Goede 1356273ec6bdSHans de Goede if (error != 0 || config_ver != ts->config[0]) { 1357273ec6bdSHans de Goede error = goodix_reset(ts); 1358273ec6bdSHans de Goede if (error) { 1359273ec6bdSHans de Goede dev_err(dev, "Controller reset failed.\n"); 1360273ec6bdSHans de Goede return error; 1361273ec6bdSHans de Goede } 1362273ec6bdSHans de Goede 1363273ec6bdSHans de Goede error = goodix_send_cfg(ts, ts->config, ts->chip->config_len); 1364273ec6bdSHans de Goede if (error) 1365273ec6bdSHans de Goede return error; 1366273ec6bdSHans de Goede } 1367273ec6bdSHans de Goede 13685ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 13695ab09d6aSIrina Tirdea if (error) 13705ab09d6aSIrina Tirdea return error; 13715ab09d6aSIrina Tirdea 13725ab09d6aSIrina Tirdea return 0; 13735ab09d6aSIrina Tirdea } 13745ab09d6aSIrina Tirdea 13755ab09d6aSIrina Tirdea static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume); 13765ab09d6aSIrina Tirdea 1377ca96ea86SBastien Nocera static const struct i2c_device_id goodix_ts_id[] = { 1378ca96ea86SBastien Nocera { "GDIX1001:00", 0 }, 1379ca96ea86SBastien Nocera { } 1380ca96ea86SBastien Nocera }; 13812e9e910eSJavier Martinez Canillas MODULE_DEVICE_TABLE(i2c, goodix_ts_id); 1382ca96ea86SBastien Nocera 1383771d8f1bSAleksei Mamlin #ifdef CONFIG_ACPI 1384ca96ea86SBastien Nocera static const struct acpi_device_id goodix_acpi_match[] = { 1385ca96ea86SBastien Nocera { "GDIX1001", 0 }, 13865ca4d1aeSEthan Lee { "GDIX1002", 0 }, 1387ca96ea86SBastien Nocera { } 1388ca96ea86SBastien Nocera }; 1389ca96ea86SBastien Nocera MODULE_DEVICE_TABLE(acpi, goodix_acpi_match); 1390771d8f1bSAleksei Mamlin #endif 1391771d8f1bSAleksei Mamlin 1392771d8f1bSAleksei Mamlin #ifdef CONFIG_OF 1393771d8f1bSAleksei Mamlin static const struct of_device_id goodix_of_match[] = { 139425309004SMarcin Niestroj { .compatible = "goodix,gt1151" }, 1395a5f50c50SJagan Teki { .compatible = "goodix,gt5663" }, 139684ef1b33SGuido Günther { .compatible = "goodix,gt5688" }, 1397771d8f1bSAleksei Mamlin { .compatible = "goodix,gt911" }, 1398771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9110" }, 1399771d8f1bSAleksei Mamlin { .compatible = "goodix,gt912" }, 1400771d8f1bSAleksei Mamlin { .compatible = "goodix,gt927" }, 1401771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9271" }, 1402771d8f1bSAleksei Mamlin { .compatible = "goodix,gt928" }, 1403771d8f1bSAleksei Mamlin { .compatible = "goodix,gt967" }, 1404771d8f1bSAleksei Mamlin { } 1405771d8f1bSAleksei Mamlin }; 1406771d8f1bSAleksei Mamlin MODULE_DEVICE_TABLE(of, goodix_of_match); 1407771d8f1bSAleksei Mamlin #endif 1408ca96ea86SBastien Nocera 1409ca96ea86SBastien Nocera static struct i2c_driver goodix_ts_driver = { 1410ca96ea86SBastien Nocera .probe = goodix_ts_probe, 141168caf858SIrina Tirdea .remove = goodix_ts_remove, 1412ca96ea86SBastien Nocera .id_table = goodix_ts_id, 1413ca96ea86SBastien Nocera .driver = { 1414ca96ea86SBastien Nocera .name = "Goodix-TS", 1415771d8f1bSAleksei Mamlin .acpi_match_table = ACPI_PTR(goodix_acpi_match), 1416771d8f1bSAleksei Mamlin .of_match_table = of_match_ptr(goodix_of_match), 14175ab09d6aSIrina Tirdea .pm = &goodix_pm_ops, 1418ca96ea86SBastien Nocera }, 1419ca96ea86SBastien Nocera }; 1420ca96ea86SBastien Nocera module_i2c_driver(goodix_ts_driver); 1421ca96ea86SBastien Nocera 1422ca96ea86SBastien Nocera MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); 1423ca96ea86SBastien Nocera MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>"); 1424ca96ea86SBastien Nocera MODULE_DESCRIPTION("Goodix touchscreen driver"); 1425ca96ea86SBastien Nocera MODULE_LICENSE("GPL v2"); 1426