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 }, 154b5e458afSIcenowy Zheng { .id = "917S", .data = >1x_chip_data }, 155cae102e2SIcenowy Zheng 156cae102e2SIcenowy Zheng { .id = "911", .data = >911_chip_data }, 157cae102e2SIcenowy Zheng { .id = "9271", .data = >911_chip_data }, 158cae102e2SIcenowy Zheng { .id = "9110", .data = >911_chip_data }, 159cae102e2SIcenowy Zheng { .id = "927", .data = >911_chip_data }, 160cae102e2SIcenowy Zheng { .id = "928", .data = >911_chip_data }, 161cae102e2SIcenowy Zheng 162cae102e2SIcenowy Zheng { .id = "912", .data = >967_chip_data }, 163cae102e2SIcenowy Zheng { .id = "967", .data = >967_chip_data }, 164cae102e2SIcenowy Zheng { } 165cae102e2SIcenowy Zheng }; 166cae102e2SIcenowy Zheng 167ca96ea86SBastien Nocera static const unsigned long goodix_irq_flags[] = { 168ca96ea86SBastien Nocera IRQ_TYPE_EDGE_RISING, 169ca96ea86SBastien Nocera IRQ_TYPE_EDGE_FALLING, 170ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_LOW, 171ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_HIGH, 172ca96ea86SBastien Nocera }; 173ca96ea86SBastien Nocera 1748b5a359cSBastien Nocera /* 1758b5a359cSBastien Nocera * Those tablets have their coordinates origin at the bottom right 1768b5a359cSBastien Nocera * of the tablet, as if rotated 180 degrees 1778b5a359cSBastien Nocera */ 1788b5a359cSBastien Nocera static const struct dmi_system_id rotated_screen[] = { 1798b5a359cSBastien Nocera #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1808b5a359cSBastien Nocera { 181df5b5e55SHans de Goede .ident = "Teclast X89", 182df5b5e55SHans de Goede .matches = { 183df5b5e55SHans de Goede /* tPAD is too generic, also match on bios date */ 184df5b5e55SHans de Goede DMI_MATCH(DMI_BOARD_VENDOR, "TECLAST"), 185df5b5e55SHans de Goede DMI_MATCH(DMI_BOARD_NAME, "tPAD"), 186df5b5e55SHans de Goede DMI_MATCH(DMI_BIOS_DATE, "12/19/2014"), 187df5b5e55SHans de Goede }, 188df5b5e55SHans de Goede }, 189df5b5e55SHans de Goede { 1908b5a359cSBastien Nocera .ident = "WinBook TW100", 1918b5a359cSBastien Nocera .matches = { 1928b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 1938b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW100") 1948b5a359cSBastien Nocera } 1958b5a359cSBastien Nocera }, 1968b5a359cSBastien Nocera { 1978b5a359cSBastien Nocera .ident = "WinBook TW700", 1988b5a359cSBastien Nocera .matches = { 1998b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 2008b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW700") 2018b5a359cSBastien Nocera }, 2028b5a359cSBastien Nocera }, 2038b5a359cSBastien Nocera #endif 2048b5a359cSBastien Nocera {} 2058b5a359cSBastien Nocera }; 2068b5a359cSBastien Nocera 207bd3b8480SYauhen Kharuzhy static const struct dmi_system_id nine_bytes_report[] = { 208bd3b8480SYauhen Kharuzhy #if defined(CONFIG_DMI) && defined(CONFIG_X86) 209bd3b8480SYauhen Kharuzhy { 210bd3b8480SYauhen Kharuzhy .ident = "Lenovo YogaBook", 211bd3b8480SYauhen Kharuzhy /* YB1-X91L/F and YB1-X90L/F */ 212bd3b8480SYauhen Kharuzhy .matches = { 213bd3b8480SYauhen Kharuzhy DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X9") 214bd3b8480SYauhen Kharuzhy } 215bd3b8480SYauhen Kharuzhy }, 216bd3b8480SYauhen Kharuzhy #endif 217bd3b8480SYauhen Kharuzhy {} 218bd3b8480SYauhen Kharuzhy }; 219bd3b8480SYauhen Kharuzhy 2201dd5ddc1SSergei A. Trusov /* 2211dd5ddc1SSergei A. Trusov * Those tablets have their x coordinate inverted 2221dd5ddc1SSergei A. Trusov */ 2231dd5ddc1SSergei A. Trusov static const struct dmi_system_id inverted_x_screen[] = { 2241dd5ddc1SSergei A. Trusov #if defined(CONFIG_DMI) && defined(CONFIG_X86) 2251dd5ddc1SSergei A. Trusov { 2261dd5ddc1SSergei A. Trusov .ident = "Cube I15-TC", 2271dd5ddc1SSergei A. Trusov .matches = { 2281dd5ddc1SSergei A. Trusov DMI_MATCH(DMI_SYS_VENDOR, "Cube"), 2291dd5ddc1SSergei A. Trusov DMI_MATCH(DMI_PRODUCT_NAME, "I15-TC") 2301dd5ddc1SSergei A. Trusov }, 2311dd5ddc1SSergei A. Trusov }, 2321dd5ddc1SSergei A. Trusov #endif 2331dd5ddc1SSergei A. Trusov {} 2341dd5ddc1SSergei A. Trusov }; 2351dd5ddc1SSergei A. Trusov 236ca96ea86SBastien Nocera /** 237ca96ea86SBastien Nocera * goodix_i2c_read - read data from a register of the i2c slave device. 238ca96ea86SBastien Nocera * 239ca96ea86SBastien Nocera * @client: i2c device. 240ca96ea86SBastien Nocera * @reg: the register to read from. 241ca96ea86SBastien Nocera * @buf: raw write data buffer. 242ca96ea86SBastien Nocera * @len: length of the buffer to write 243ca96ea86SBastien Nocera */ 244ca96ea86SBastien Nocera static int goodix_i2c_read(struct i2c_client *client, 245ca96ea86SBastien Nocera u16 reg, u8 *buf, int len) 246ca96ea86SBastien Nocera { 247ca96ea86SBastien Nocera struct i2c_msg msgs[2]; 248fafef982SMarcin Niestroj __be16 wbuf = cpu_to_be16(reg); 249ca96ea86SBastien Nocera int ret; 250ca96ea86SBastien Nocera 251ca96ea86SBastien Nocera msgs[0].flags = 0; 252ca96ea86SBastien Nocera msgs[0].addr = client->addr; 253ca96ea86SBastien Nocera msgs[0].len = 2; 254ca96ea86SBastien Nocera msgs[0].buf = (u8 *)&wbuf; 255ca96ea86SBastien Nocera 256ca96ea86SBastien Nocera msgs[1].flags = I2C_M_RD; 257ca96ea86SBastien Nocera msgs[1].addr = client->addr; 258ca96ea86SBastien Nocera msgs[1].len = len; 259ca96ea86SBastien Nocera msgs[1].buf = buf; 260ca96ea86SBastien Nocera 261ca96ea86SBastien Nocera ret = i2c_transfer(client->adapter, msgs, 2); 262ca96ea86SBastien Nocera return ret < 0 ? ret : (ret != ARRAY_SIZE(msgs) ? -EIO : 0); 263ca96ea86SBastien Nocera } 264ca96ea86SBastien Nocera 26568caf858SIrina Tirdea /** 26668caf858SIrina Tirdea * goodix_i2c_write - write data to a register of the i2c slave device. 26768caf858SIrina Tirdea * 26868caf858SIrina Tirdea * @client: i2c device. 26968caf858SIrina Tirdea * @reg: the register to write to. 27068caf858SIrina Tirdea * @buf: raw data buffer to write. 27168caf858SIrina Tirdea * @len: length of the buffer to write 27268caf858SIrina Tirdea */ 27368caf858SIrina Tirdea static int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf, 27468caf858SIrina Tirdea unsigned len) 27568caf858SIrina Tirdea { 27668caf858SIrina Tirdea u8 *addr_buf; 27768caf858SIrina Tirdea struct i2c_msg msg; 27868caf858SIrina Tirdea int ret; 27968caf858SIrina Tirdea 28068caf858SIrina Tirdea addr_buf = kmalloc(len + 2, GFP_KERNEL); 28168caf858SIrina Tirdea if (!addr_buf) 28268caf858SIrina Tirdea return -ENOMEM; 28368caf858SIrina Tirdea 28468caf858SIrina Tirdea addr_buf[0] = reg >> 8; 28568caf858SIrina Tirdea addr_buf[1] = reg & 0xFF; 28668caf858SIrina Tirdea memcpy(&addr_buf[2], buf, len); 28768caf858SIrina Tirdea 28868caf858SIrina Tirdea msg.flags = 0; 28968caf858SIrina Tirdea msg.addr = client->addr; 29068caf858SIrina Tirdea msg.buf = addr_buf; 29168caf858SIrina Tirdea msg.len = len + 2; 29268caf858SIrina Tirdea 29368caf858SIrina Tirdea ret = i2c_transfer(client->adapter, &msg, 1); 29468caf858SIrina Tirdea kfree(addr_buf); 29568caf858SIrina Tirdea return ret < 0 ? ret : (ret != 1 ? -EIO : 0); 29668caf858SIrina Tirdea } 29768caf858SIrina Tirdea 2985ab09d6aSIrina Tirdea static int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value) 2995ab09d6aSIrina Tirdea { 3005ab09d6aSIrina Tirdea return goodix_i2c_write(client, reg, &value, sizeof(value)); 3015ab09d6aSIrina Tirdea } 3025ab09d6aSIrina Tirdea 303cae102e2SIcenowy Zheng static const struct goodix_chip_data *goodix_get_chip_data(const char *id) 304a779fbc6SIrina Tirdea { 305cae102e2SIcenowy Zheng unsigned int i; 30625309004SMarcin Niestroj 307cae102e2SIcenowy Zheng for (i = 0; goodix_chip_ids[i].id; i++) { 308cae102e2SIcenowy Zheng if (!strcmp(goodix_chip_ids[i].id, id)) 309cae102e2SIcenowy Zheng return goodix_chip_ids[i].data; 310a779fbc6SIrina Tirdea } 311cae102e2SIcenowy Zheng 312cae102e2SIcenowy Zheng return >9x_chip_data; 313a779fbc6SIrina Tirdea } 314a779fbc6SIrina Tirdea 315ca96ea86SBastien Nocera static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data) 316ca96ea86SBastien Nocera { 3179b5db7aaSPaul Cercueil unsigned long max_timeout; 318ca96ea86SBastien Nocera int touch_num; 319ca96ea86SBastien Nocera int error; 320492ee52cSDmitry Mastykin u16 addr = GOODIX_READ_COOR_ADDR; 321492ee52cSDmitry Mastykin /* 322492ee52cSDmitry Mastykin * We are going to read 1-byte header, 323492ee52cSDmitry Mastykin * ts->contact_size * max(1, touch_num) bytes of coordinates 324492ee52cSDmitry Mastykin * and 1-byte footer which contains the touch-key code. 325492ee52cSDmitry Mastykin */ 326492ee52cSDmitry Mastykin const int header_contact_keycode_size = 1 + ts->contact_size + 1; 327ca96ea86SBastien Nocera 3289b5db7aaSPaul Cercueil /* 3299b5db7aaSPaul Cercueil * The 'buffer status' bit, which indicates that the data is valid, is 3309b5db7aaSPaul Cercueil * not set as soon as the interrupt is raised, but slightly after. 3319b5db7aaSPaul Cercueil * This takes around 10 ms to happen, so we poll for 20 ms. 3329b5db7aaSPaul Cercueil */ 3339b5db7aaSPaul Cercueil max_timeout = jiffies + msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT); 3349b5db7aaSPaul Cercueil do { 335492ee52cSDmitry Mastykin error = goodix_i2c_read(ts->client, addr, data, 336492ee52cSDmitry Mastykin header_contact_keycode_size); 337ca96ea86SBastien Nocera if (error) { 3389b5db7aaSPaul Cercueil dev_err(&ts->client->dev, "I2C transfer error: %d\n", 3399b5db7aaSPaul Cercueil error); 340ca96ea86SBastien Nocera return error; 341ca96ea86SBastien Nocera } 342ca96ea86SBastien Nocera 3439b5db7aaSPaul Cercueil if (data[0] & GOODIX_BUFFER_STATUS_READY) { 344ca96ea86SBastien Nocera touch_num = data[0] & 0x0f; 345a7ac7c95SAleksei Mamlin if (touch_num > ts->max_touch_num) 346ca96ea86SBastien Nocera return -EPROTO; 347ca96ea86SBastien Nocera 348ca96ea86SBastien Nocera if (touch_num > 1) { 349492ee52cSDmitry Mastykin addr += header_contact_keycode_size; 350492ee52cSDmitry Mastykin data += header_contact_keycode_size; 351ca96ea86SBastien Nocera error = goodix_i2c_read(ts->client, 352492ee52cSDmitry Mastykin addr, data, 353bd3b8480SYauhen Kharuzhy ts->contact_size * 3549b5db7aaSPaul Cercueil (touch_num - 1)); 355ca96ea86SBastien Nocera if (error) 356ca96ea86SBastien Nocera return error; 357ca96ea86SBastien Nocera } 358ca96ea86SBastien Nocera 359ca96ea86SBastien Nocera return touch_num; 360ca96ea86SBastien Nocera } 361ca96ea86SBastien Nocera 3629b5db7aaSPaul Cercueil usleep_range(1000, 2000); /* Poll every 1 - 2 ms */ 3639b5db7aaSPaul Cercueil } while (time_before(jiffies, max_timeout)); 3649b5db7aaSPaul Cercueil 3659b5db7aaSPaul Cercueil /* 3669b5db7aaSPaul Cercueil * The Goodix panel will send spurious interrupts after a 3679b5db7aaSPaul Cercueil * 'finger up' event, which will always cause a timeout. 3689b5db7aaSPaul Cercueil */ 36924ef83f6SDmitry Mastykin return -ENOMSG; 3709b5db7aaSPaul Cercueil } 3719b5db7aaSPaul Cercueil 372bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_8b(struct goodix_ts_data *ts, u8 *coor_data) 373ca96ea86SBastien Nocera { 374ca96ea86SBastien Nocera int id = coor_data[0] & 0x0F; 375ca96ea86SBastien Nocera int input_x = get_unaligned_le16(&coor_data[1]); 376ca96ea86SBastien Nocera int input_y = get_unaligned_le16(&coor_data[3]); 377ca96ea86SBastien Nocera int input_w = get_unaligned_le16(&coor_data[5]); 378ca96ea86SBastien Nocera 379ca96ea86SBastien Nocera input_mt_slot(ts->input_dev, id); 380ca96ea86SBastien Nocera input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 381fafef982SMarcin Niestroj touchscreen_report_pos(ts->input_dev, &ts->prop, 382fafef982SMarcin Niestroj input_x, input_y, true); 383ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 384ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 385ca96ea86SBastien Nocera } 386ca96ea86SBastien Nocera 387bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_9b(struct goodix_ts_data *ts, u8 *coor_data) 388bd3b8480SYauhen Kharuzhy { 389bd3b8480SYauhen Kharuzhy int id = coor_data[1] & 0x0F; 390bd3b8480SYauhen Kharuzhy int input_x = get_unaligned_le16(&coor_data[3]); 391bd3b8480SYauhen Kharuzhy int input_y = get_unaligned_le16(&coor_data[5]); 392bd3b8480SYauhen Kharuzhy int input_w = get_unaligned_le16(&coor_data[7]); 393bd3b8480SYauhen Kharuzhy 394bd3b8480SYauhen Kharuzhy input_mt_slot(ts->input_dev, id); 395bd3b8480SYauhen Kharuzhy input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 396bd3b8480SYauhen Kharuzhy touchscreen_report_pos(ts->input_dev, &ts->prop, 397bd3b8480SYauhen Kharuzhy input_x, input_y, true); 398bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 399bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 400bd3b8480SYauhen Kharuzhy } 401bd3b8480SYauhen Kharuzhy 402492ee52cSDmitry Mastykin static void goodix_ts_report_key(struct goodix_ts_data *ts, u8 *data) 403492ee52cSDmitry Mastykin { 404492ee52cSDmitry Mastykin int touch_num; 405492ee52cSDmitry Mastykin u8 key_value; 406492ee52cSDmitry Mastykin int i; 407492ee52cSDmitry Mastykin 408492ee52cSDmitry Mastykin if (data[0] & GOODIX_HAVE_KEY) { 409492ee52cSDmitry Mastykin touch_num = data[0] & 0x0f; 410492ee52cSDmitry Mastykin key_value = data[1 + ts->contact_size * touch_num]; 411492ee52cSDmitry Mastykin for (i = 0; i < GOODIX_MAX_KEYS; i++) 412492ee52cSDmitry Mastykin if (key_value & BIT(i)) 413492ee52cSDmitry Mastykin input_report_key(ts->input_dev, 414492ee52cSDmitry Mastykin ts->keymap[i], 1); 415492ee52cSDmitry Mastykin } else { 416492ee52cSDmitry Mastykin for (i = 0; i < GOODIX_MAX_KEYS; i++) 417492ee52cSDmitry Mastykin input_report_key(ts->input_dev, ts->keymap[i], 0); 418492ee52cSDmitry Mastykin } 419492ee52cSDmitry Mastykin } 420492ee52cSDmitry Mastykin 421ca96ea86SBastien Nocera /** 422ca96ea86SBastien Nocera * goodix_process_events - Process incoming events 423ca96ea86SBastien Nocera * 424ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 425ca96ea86SBastien Nocera * 426ca96ea86SBastien Nocera * Called when the IRQ is triggered. Read the current device state, and push 427ca96ea86SBastien Nocera * the input events to the user space. 428ca96ea86SBastien Nocera */ 429ca96ea86SBastien Nocera static void goodix_process_events(struct goodix_ts_data *ts) 430ca96ea86SBastien Nocera { 431492ee52cSDmitry Mastykin u8 point_data[2 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS]; 432ca96ea86SBastien Nocera int touch_num; 433ca96ea86SBastien Nocera int i; 434ca96ea86SBastien Nocera 435ca96ea86SBastien Nocera touch_num = goodix_ts_read_input_report(ts, point_data); 436ca96ea86SBastien Nocera if (touch_num < 0) 437ca96ea86SBastien Nocera return; 438ca96ea86SBastien Nocera 439492ee52cSDmitry Mastykin goodix_ts_report_key(ts, point_data); 4404a54feeaSSergei A. Trusov 441ca96ea86SBastien Nocera for (i = 0; i < touch_num; i++) 442bd3b8480SYauhen Kharuzhy if (ts->contact_size == 9) 443bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_9b(ts, 444bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 445bd3b8480SYauhen Kharuzhy else 446bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_8b(ts, 447bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 448ca96ea86SBastien Nocera 449ca96ea86SBastien Nocera input_mt_sync_frame(ts->input_dev); 450ca96ea86SBastien Nocera input_sync(ts->input_dev); 451ca96ea86SBastien Nocera } 452ca96ea86SBastien Nocera 453ca96ea86SBastien Nocera /** 454ca96ea86SBastien Nocera * goodix_ts_irq_handler - The IRQ handler 455ca96ea86SBastien Nocera * 456ca96ea86SBastien Nocera * @irq: interrupt number. 457ca96ea86SBastien Nocera * @dev_id: private data pointer. 458ca96ea86SBastien Nocera */ 459ca96ea86SBastien Nocera static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id) 460ca96ea86SBastien Nocera { 461ca96ea86SBastien Nocera struct goodix_ts_data *ts = dev_id; 462ca96ea86SBastien Nocera 463ca96ea86SBastien Nocera goodix_process_events(ts); 464ca96ea86SBastien Nocera 4655d655b35SIrina Tirdea if (goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0) < 0) 466ca96ea86SBastien Nocera dev_err(&ts->client->dev, "I2C write end_cmd error\n"); 467ca96ea86SBastien Nocera 468ca96ea86SBastien Nocera return IRQ_HANDLED; 469ca96ea86SBastien Nocera } 470ca96ea86SBastien Nocera 4715ab09d6aSIrina Tirdea static void goodix_free_irq(struct goodix_ts_data *ts) 4725ab09d6aSIrina Tirdea { 4735ab09d6aSIrina Tirdea devm_free_irq(&ts->client->dev, ts->client->irq, ts); 4745ab09d6aSIrina Tirdea } 4755ab09d6aSIrina Tirdea 4765ab09d6aSIrina Tirdea static int goodix_request_irq(struct goodix_ts_data *ts) 4775ab09d6aSIrina Tirdea { 4785ab09d6aSIrina Tirdea return devm_request_threaded_irq(&ts->client->dev, ts->client->irq, 4795ab09d6aSIrina Tirdea NULL, goodix_ts_irq_handler, 4805ab09d6aSIrina Tirdea ts->irq_flags, ts->client->name, ts); 4815ab09d6aSIrina Tirdea } 4825ab09d6aSIrina Tirdea 4831a67448fSHans de Goede static int goodix_check_cfg_8(struct goodix_ts_data *ts, const u8 *cfg, int len) 48468caf858SIrina Tirdea { 4851a67448fSHans de Goede int i, raw_cfg_len = len - 2; 48668caf858SIrina Tirdea u8 check_sum = 0; 48768caf858SIrina Tirdea 48868caf858SIrina Tirdea for (i = 0; i < raw_cfg_len; i++) 4891a67448fSHans de Goede check_sum += cfg[i]; 49068caf858SIrina Tirdea check_sum = (~check_sum) + 1; 4911a67448fSHans de Goede if (check_sum != cfg[raw_cfg_len]) { 49268caf858SIrina Tirdea dev_err(&ts->client->dev, 49368caf858SIrina Tirdea "The checksum of the config fw is not correct"); 49468caf858SIrina Tirdea return -EINVAL; 49568caf858SIrina Tirdea } 49668caf858SIrina Tirdea 4971a67448fSHans de Goede if (cfg[raw_cfg_len + 1] != 1) { 49868caf858SIrina Tirdea dev_err(&ts->client->dev, 49968caf858SIrina Tirdea "Config fw must have Config_Fresh register set"); 50068caf858SIrina Tirdea return -EINVAL; 50168caf858SIrina Tirdea } 50268caf858SIrina Tirdea 50368caf858SIrina Tirdea return 0; 50468caf858SIrina Tirdea } 50568caf858SIrina Tirdea 506de956caeSHans de Goede static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts) 507de956caeSHans de Goede { 508de956caeSHans de Goede int i, raw_cfg_len = ts->chip->config_len - 2; 509de956caeSHans de Goede u8 check_sum = 0; 510de956caeSHans de Goede 511de956caeSHans de Goede for (i = 0; i < raw_cfg_len; i++) 512de956caeSHans de Goede check_sum += ts->config[i]; 513de956caeSHans de Goede check_sum = (~check_sum) + 1; 514de956caeSHans de Goede 515de956caeSHans de Goede ts->config[raw_cfg_len] = check_sum; 516de956caeSHans de Goede ts->config[raw_cfg_len + 1] = 1; /* Set "config_fresh" bit */ 517de956caeSHans de Goede } 518de956caeSHans de Goede 5191a67448fSHans de Goede static int goodix_check_cfg_16(struct goodix_ts_data *ts, const u8 *cfg, 5201a67448fSHans de Goede int len) 52125309004SMarcin Niestroj { 5221a67448fSHans de Goede int i, raw_cfg_len = len - 3; 52325309004SMarcin Niestroj u16 check_sum = 0; 52425309004SMarcin Niestroj 52525309004SMarcin Niestroj for (i = 0; i < raw_cfg_len; i += 2) 5261a67448fSHans de Goede check_sum += get_unaligned_be16(&cfg[i]); 52725309004SMarcin Niestroj check_sum = (~check_sum) + 1; 5281a67448fSHans de Goede if (check_sum != get_unaligned_be16(&cfg[raw_cfg_len])) { 52925309004SMarcin Niestroj dev_err(&ts->client->dev, 53025309004SMarcin Niestroj "The checksum of the config fw is not correct"); 53125309004SMarcin Niestroj return -EINVAL; 53225309004SMarcin Niestroj } 53325309004SMarcin Niestroj 5341a67448fSHans de Goede if (cfg[raw_cfg_len + 2] != 1) { 53525309004SMarcin Niestroj dev_err(&ts->client->dev, 53625309004SMarcin Niestroj "Config fw must have Config_Fresh register set"); 53725309004SMarcin Niestroj return -EINVAL; 53825309004SMarcin Niestroj } 53925309004SMarcin Niestroj 54025309004SMarcin Niestroj return 0; 54125309004SMarcin Niestroj } 54225309004SMarcin Niestroj 543de956caeSHans de Goede static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts) 544de956caeSHans de Goede { 545de956caeSHans de Goede int i, raw_cfg_len = ts->chip->config_len - 3; 546de956caeSHans de Goede u16 check_sum = 0; 547de956caeSHans de Goede 548de956caeSHans de Goede for (i = 0; i < raw_cfg_len; i += 2) 549de956caeSHans de Goede check_sum += get_unaligned_be16(&ts->config[i]); 550de956caeSHans de Goede check_sum = (~check_sum) + 1; 551de956caeSHans de Goede 552de956caeSHans de Goede put_unaligned_be16(check_sum, &ts->config[raw_cfg_len]); 553de956caeSHans de Goede ts->config[raw_cfg_len + 2] = 1; /* Set "config_fresh" bit */ 554de956caeSHans de Goede } 555de956caeSHans de Goede 55625309004SMarcin Niestroj /** 55725309004SMarcin Niestroj * goodix_check_cfg - Checks if config fw is valid 55825309004SMarcin Niestroj * 55925309004SMarcin Niestroj * @ts: goodix_ts_data pointer 56025309004SMarcin Niestroj * @cfg: firmware config data 56125309004SMarcin Niestroj */ 5621a67448fSHans de Goede static int goodix_check_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) 56325309004SMarcin Niestroj { 5641a67448fSHans de Goede if (len < GOODIX_CONFIG_MIN_LENGTH || 5651a67448fSHans de Goede len > GOODIX_CONFIG_MAX_LENGTH) { 56625309004SMarcin Niestroj dev_err(&ts->client->dev, 56725309004SMarcin Niestroj "The length of the config fw is not correct"); 56825309004SMarcin Niestroj return -EINVAL; 56925309004SMarcin Niestroj } 57025309004SMarcin Niestroj 5711a67448fSHans de Goede return ts->chip->check_config(ts, cfg, len); 57225309004SMarcin Niestroj } 57325309004SMarcin Niestroj 57468caf858SIrina Tirdea /** 57568caf858SIrina Tirdea * goodix_send_cfg - Write fw config to device 57668caf858SIrina Tirdea * 57768caf858SIrina Tirdea * @ts: goodix_ts_data pointer 57868caf858SIrina Tirdea * @cfg: config firmware to write to device 57968caf858SIrina Tirdea */ 5801a67448fSHans de Goede static int goodix_send_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) 58168caf858SIrina Tirdea { 58268caf858SIrina Tirdea int error; 58368caf858SIrina Tirdea 5841a67448fSHans de Goede error = goodix_check_cfg(ts, cfg, len); 58568caf858SIrina Tirdea if (error) 58668caf858SIrina Tirdea return error; 58768caf858SIrina Tirdea 5881a67448fSHans de Goede error = goodix_i2c_write(ts->client, ts->chip->config_addr, cfg, len); 58968caf858SIrina Tirdea if (error) { 59068caf858SIrina Tirdea dev_err(&ts->client->dev, "Failed to write config data: %d", 59168caf858SIrina Tirdea error); 59268caf858SIrina Tirdea return error; 59368caf858SIrina Tirdea } 59468caf858SIrina Tirdea dev_dbg(&ts->client->dev, "Config sent successfully."); 59568caf858SIrina Tirdea 59668caf858SIrina Tirdea /* Let the firmware reconfigure itself, so sleep for 10ms */ 59768caf858SIrina Tirdea usleep_range(10000, 11000); 59868caf858SIrina Tirdea 59968caf858SIrina Tirdea return 0; 60068caf858SIrina Tirdea } 60168caf858SIrina Tirdea 60249db3997SHans de Goede static int goodix_irq_direction_output(struct goodix_ts_data *ts, 60349db3997SHans de Goede int value) 60449db3997SHans de Goede { 605c5fca485SHans de Goede struct device *dev = &ts->client->dev; 606c5fca485SHans de Goede acpi_status status; 607c5fca485SHans de Goede 60849db3997SHans de Goede switch (ts->irq_pin_access_method) { 60949db3997SHans de Goede case IRQ_PIN_ACCESS_NONE: 61049db3997SHans de Goede dev_err(&ts->client->dev, 61149db3997SHans de Goede "%s called without an irq_pin_access_method set\n", 61249db3997SHans de Goede __func__); 61349db3997SHans de Goede return -EINVAL; 61449db3997SHans de Goede case IRQ_PIN_ACCESS_GPIO: 61549db3997SHans de Goede return gpiod_direction_output(ts->gpiod_int, value); 616a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 617a7d4b171SHans de Goede /* 618a7d4b171SHans de Goede * The IRQ pin triggers on a falling edge, so its gets marked 619a7d4b171SHans de Goede * as active-low, use output_raw to avoid the value inversion. 620a7d4b171SHans de Goede */ 621a7d4b171SHans de Goede return gpiod_direction_output_raw(ts->gpiod_int, value); 622c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 623c5fca485SHans de Goede status = acpi_execute_simple_method(ACPI_HANDLE(dev), 624c5fca485SHans de Goede "INTO", value); 625c5fca485SHans de Goede return ACPI_SUCCESS(status) ? 0 : -EIO; 62649db3997SHans de Goede } 62749db3997SHans de Goede 62849db3997SHans de Goede return -EINVAL; /* Never reached */ 62949db3997SHans de Goede } 63049db3997SHans de Goede 63149db3997SHans de Goede static int goodix_irq_direction_input(struct goodix_ts_data *ts) 63249db3997SHans de Goede { 633c5fca485SHans de Goede struct device *dev = &ts->client->dev; 634c5fca485SHans de Goede acpi_status status; 635c5fca485SHans de Goede 63649db3997SHans de Goede switch (ts->irq_pin_access_method) { 63749db3997SHans de Goede case IRQ_PIN_ACCESS_NONE: 63849db3997SHans de Goede dev_err(&ts->client->dev, 63949db3997SHans de Goede "%s called without an irq_pin_access_method set\n", 64049db3997SHans de Goede __func__); 64149db3997SHans de Goede return -EINVAL; 64249db3997SHans de Goede case IRQ_PIN_ACCESS_GPIO: 643a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 64449db3997SHans de Goede return gpiod_direction_input(ts->gpiod_int); 645c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 646c5fca485SHans de Goede status = acpi_evaluate_object(ACPI_HANDLE(dev), "INTI", 647c5fca485SHans de Goede NULL, NULL); 648c5fca485SHans de Goede return ACPI_SUCCESS(status) ? 0 : -EIO; 64949db3997SHans de Goede } 65049db3997SHans de Goede 65149db3997SHans de Goede return -EINVAL; /* Never reached */ 65249db3997SHans de Goede } 65349db3997SHans de Goede 654ec6e1b40SIrina Tirdea static int goodix_int_sync(struct goodix_ts_data *ts) 655ec6e1b40SIrina Tirdea { 656ec6e1b40SIrina Tirdea int error; 657ec6e1b40SIrina Tirdea 65849db3997SHans de Goede error = goodix_irq_direction_output(ts, 0); 659ec6e1b40SIrina Tirdea if (error) 660ec6e1b40SIrina Tirdea return error; 661ec6e1b40SIrina Tirdea 662ec6e1b40SIrina Tirdea msleep(50); /* T5: 50ms */ 663ec6e1b40SIrina Tirdea 66449db3997SHans de Goede error = goodix_irq_direction_input(ts); 665ec6e1b40SIrina Tirdea if (error) 666ec6e1b40SIrina Tirdea return error; 667ec6e1b40SIrina Tirdea 668ec6e1b40SIrina Tirdea return 0; 669ec6e1b40SIrina Tirdea } 670ec6e1b40SIrina Tirdea 671ec6e1b40SIrina Tirdea /** 672ec6e1b40SIrina Tirdea * goodix_reset - Reset device during power on 673ec6e1b40SIrina Tirdea * 674ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 675ec6e1b40SIrina Tirdea */ 676ec6e1b40SIrina Tirdea static int goodix_reset(struct goodix_ts_data *ts) 677ec6e1b40SIrina Tirdea { 678ec6e1b40SIrina Tirdea int error; 679ec6e1b40SIrina Tirdea 680ec6e1b40SIrina Tirdea /* begin select I2C slave addr */ 681ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 0); 682ec6e1b40SIrina Tirdea if (error) 683ec6e1b40SIrina Tirdea return error; 684ec6e1b40SIrina Tirdea 685ec6e1b40SIrina Tirdea msleep(20); /* T2: > 10ms */ 686ec6e1b40SIrina Tirdea 687ec6e1b40SIrina Tirdea /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */ 68849db3997SHans de Goede error = goodix_irq_direction_output(ts, ts->client->addr == 0x14); 689ec6e1b40SIrina Tirdea if (error) 690ec6e1b40SIrina Tirdea return error; 691ec6e1b40SIrina Tirdea 692ec6e1b40SIrina Tirdea usleep_range(100, 2000); /* T3: > 100us */ 693ec6e1b40SIrina Tirdea 694ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 1); 695ec6e1b40SIrina Tirdea if (error) 696ec6e1b40SIrina Tirdea return error; 697ec6e1b40SIrina Tirdea 698ec6e1b40SIrina Tirdea usleep_range(6000, 10000); /* T4: > 5ms */ 699ec6e1b40SIrina Tirdea 700ec6e1b40SIrina Tirdea /* end select I2C slave addr */ 701ec6e1b40SIrina Tirdea error = gpiod_direction_input(ts->gpiod_rst); 702ec6e1b40SIrina Tirdea if (error) 703ec6e1b40SIrina Tirdea return error; 704ec6e1b40SIrina Tirdea 705ec6e1b40SIrina Tirdea error = goodix_int_sync(ts); 706ec6e1b40SIrina Tirdea if (error) 707ec6e1b40SIrina Tirdea return error; 708ec6e1b40SIrina Tirdea 709ec6e1b40SIrina Tirdea return 0; 710ec6e1b40SIrina Tirdea } 711ec6e1b40SIrina Tirdea 712a7d4b171SHans de Goede #if defined CONFIG_X86 && defined CONFIG_ACPI 71367abd9eeSHans de Goede #include <asm/cpu_device_id.h> 71467abd9eeSHans de Goede #include <asm/intel-family.h> 71567abd9eeSHans de Goede 71667abd9eeSHans de Goede static const struct x86_cpu_id baytrail_cpu_ids[] = { 71767abd9eeSHans de Goede { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT, X86_FEATURE_ANY, }, 71867abd9eeSHans de Goede {} 71967abd9eeSHans de Goede }; 72067abd9eeSHans de Goede 72167abd9eeSHans de Goede static inline bool is_byt(void) 72267abd9eeSHans de Goede { 72367abd9eeSHans de Goede const struct x86_cpu_id *id = x86_match_cpu(baytrail_cpu_ids); 72467abd9eeSHans de Goede 72567abd9eeSHans de Goede return !!id; 72667abd9eeSHans de Goede } 72767abd9eeSHans de Goede 728a7d4b171SHans de Goede static const struct acpi_gpio_params first_gpio = { 0, 0, false }; 729a7d4b171SHans de Goede static const struct acpi_gpio_params second_gpio = { 1, 0, false }; 730a7d4b171SHans de Goede 731a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_first_gpios[] = { 732a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &first_gpio, 1 }, 733a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &second_gpio, 1 }, 734a7d4b171SHans de Goede { }, 735a7d4b171SHans de Goede }; 736a7d4b171SHans de Goede 737a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_last_gpios[] = { 738a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 739a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &second_gpio, 1 }, 740a7d4b171SHans de Goede { }, 741a7d4b171SHans de Goede }; 742a7d4b171SHans de Goede 743c5fca485SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_reset_only_gpios[] = { 744c5fca485SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 745c5fca485SHans de Goede { }, 746c5fca485SHans de Goede }; 747c5fca485SHans de Goede 748a7d4b171SHans de Goede static int goodix_resource(struct acpi_resource *ares, void *data) 749a7d4b171SHans de Goede { 750a7d4b171SHans de Goede struct goodix_ts_data *ts = data; 751a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 752a7d4b171SHans de Goede struct acpi_resource_gpio *gpio; 753a7d4b171SHans de Goede 754a7d4b171SHans de Goede switch (ares->type) { 755a7d4b171SHans de Goede case ACPI_RESOURCE_TYPE_GPIO: 756a7d4b171SHans de Goede gpio = &ares->data.gpio; 757a7d4b171SHans de Goede if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { 758a7d4b171SHans de Goede if (ts->gpio_int_idx == -1) { 759a7d4b171SHans de Goede ts->gpio_int_idx = ts->gpio_count; 760a7d4b171SHans de Goede } else { 761a7d4b171SHans de Goede dev_err(dev, "More then one GpioInt resource, ignoring ACPI GPIO resources\n"); 762a7d4b171SHans de Goede ts->gpio_int_idx = -2; 763a7d4b171SHans de Goede } 764a7d4b171SHans de Goede } 765a7d4b171SHans de Goede ts->gpio_count++; 766a7d4b171SHans de Goede break; 767a7d4b171SHans de Goede default: 768a7d4b171SHans de Goede break; 769a7d4b171SHans de Goede } 770a7d4b171SHans de Goede 771a7d4b171SHans de Goede return 0; 772a7d4b171SHans de Goede } 773a7d4b171SHans de Goede 774a7d4b171SHans de Goede /* 775a7d4b171SHans de Goede * This function gets called in case we fail to get the irq GPIO directly 776a7d4b171SHans de Goede * because the ACPI tables lack GPIO-name to APCI _CRS index mappings 777a7d4b171SHans de Goede * (no _DSD UUID daffd814-6eba-4d8c-8a91-bc9bbf4aa301 data). 778a7d4b171SHans de Goede * In that case we add our own mapping and then goodix_get_gpio_config() 779a7d4b171SHans de Goede * retries to get the GPIOs based on the added mapping. 780a7d4b171SHans de Goede */ 781a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 782a7d4b171SHans de Goede { 783a7d4b171SHans de Goede const struct acpi_gpio_mapping *gpio_mapping = NULL; 784a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 785a7d4b171SHans de Goede LIST_HEAD(resources); 786a7d4b171SHans de Goede int ret; 787a7d4b171SHans de Goede 788a7d4b171SHans de Goede ts->gpio_count = 0; 789a7d4b171SHans de Goede ts->gpio_int_idx = -1; 790a7d4b171SHans de Goede ret = acpi_dev_get_resources(ACPI_COMPANION(dev), &resources, 791a7d4b171SHans de Goede goodix_resource, ts); 792a7d4b171SHans de Goede if (ret < 0) { 793a7d4b171SHans de Goede dev_err(dev, "Error getting ACPI resources: %d\n", ret); 794a7d4b171SHans de Goede return ret; 795a7d4b171SHans de Goede } 796a7d4b171SHans de Goede 797a7d4b171SHans de Goede acpi_dev_free_resource_list(&resources); 798a7d4b171SHans de Goede 799a7d4b171SHans de Goede if (ts->gpio_count == 2 && ts->gpio_int_idx == 0) { 800a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 801a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_first_gpios; 802a7d4b171SHans de Goede } else if (ts->gpio_count == 2 && ts->gpio_int_idx == 1) { 803a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 804a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_last_gpios; 805c5fca485SHans de Goede } else if (ts->gpio_count == 1 && ts->gpio_int_idx == -1 && 806c5fca485SHans de Goede acpi_has_method(ACPI_HANDLE(dev), "INTI") && 807c5fca485SHans de Goede acpi_has_method(ACPI_HANDLE(dev), "INTO")) { 808c5fca485SHans de Goede dev_info(dev, "Using ACPI INTI and INTO methods for IRQ pin access\n"); 809c5fca485SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_METHOD; 810c5fca485SHans de Goede gpio_mapping = acpi_goodix_reset_only_gpios; 81167abd9eeSHans de Goede } else if (is_byt() && ts->gpio_count == 2 && ts->gpio_int_idx == -1) { 81267abd9eeSHans de Goede dev_info(dev, "No ACPI GpioInt resource, assuming that the GPIO order is reset, int\n"); 81367abd9eeSHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 81467abd9eeSHans de Goede gpio_mapping = acpi_goodix_int_last_gpios; 815a7d4b171SHans de Goede } else { 816a7d4b171SHans de Goede dev_warn(dev, "Unexpected ACPI resources: gpio_count %d, gpio_int_idx %d\n", 817a7d4b171SHans de Goede ts->gpio_count, ts->gpio_int_idx); 818a7d4b171SHans de Goede return -EINVAL; 819a7d4b171SHans de Goede } 820a7d4b171SHans de Goede 821a7d4b171SHans de Goede return devm_acpi_dev_add_driver_gpios(dev, gpio_mapping); 822a7d4b171SHans de Goede } 823a7d4b171SHans de Goede #else 824a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 825a7d4b171SHans de Goede { 826a7d4b171SHans de Goede return -EINVAL; 827a7d4b171SHans de Goede } 828a7d4b171SHans de Goede #endif /* CONFIG_X86 && CONFIG_ACPI */ 829a7d4b171SHans de Goede 830ec6e1b40SIrina Tirdea /** 831ec6e1b40SIrina Tirdea * goodix_get_gpio_config - Get GPIO config from ACPI/DT 832ec6e1b40SIrina Tirdea * 833ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 834ec6e1b40SIrina Tirdea */ 835ec6e1b40SIrina Tirdea static int goodix_get_gpio_config(struct goodix_ts_data *ts) 836ec6e1b40SIrina Tirdea { 837ec6e1b40SIrina Tirdea int error; 838ec6e1b40SIrina Tirdea struct device *dev; 839ec6e1b40SIrina Tirdea struct gpio_desc *gpiod; 840a7d4b171SHans de Goede bool added_acpi_mappings = false; 841ec6e1b40SIrina Tirdea 842ec6e1b40SIrina Tirdea if (!ts->client) 843ec6e1b40SIrina Tirdea return -EINVAL; 844ec6e1b40SIrina Tirdea dev = &ts->client->dev; 845ec6e1b40SIrina Tirdea 846ae97fb58SJagan Teki ts->avdd28 = devm_regulator_get(dev, "AVDD28"); 847ae97fb58SJagan Teki if (IS_ERR(ts->avdd28)) { 848ae97fb58SJagan Teki error = PTR_ERR(ts->avdd28); 849ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 850ae97fb58SJagan Teki dev_err(dev, 851ae97fb58SJagan Teki "Failed to get AVDD28 regulator: %d\n", error); 852ae97fb58SJagan Teki return error; 853ae97fb58SJagan Teki } 854ae97fb58SJagan Teki 855ae97fb58SJagan Teki ts->vddio = devm_regulator_get(dev, "VDDIO"); 856ae97fb58SJagan Teki if (IS_ERR(ts->vddio)) { 857ae97fb58SJagan Teki error = PTR_ERR(ts->vddio); 858ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 859ae97fb58SJagan Teki dev_err(dev, 860ae97fb58SJagan Teki "Failed to get VDDIO regulator: %d\n", error); 861ae97fb58SJagan Teki return error; 862ae97fb58SJagan Teki } 863ae97fb58SJagan Teki 864a7d4b171SHans de Goede retry_get_irq_gpio: 865ec6e1b40SIrina Tirdea /* Get the interrupt GPIO pin number */ 866ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN); 867ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 868ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 869ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 870ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 871ec6e1b40SIrina Tirdea GOODIX_GPIO_INT_NAME, error); 872ec6e1b40SIrina Tirdea return error; 873ec6e1b40SIrina Tirdea } 874a7d4b171SHans de Goede if (!gpiod && has_acpi_companion(dev) && !added_acpi_mappings) { 875a7d4b171SHans de Goede added_acpi_mappings = true; 876a7d4b171SHans de Goede if (goodix_add_acpi_gpio_mappings(ts) == 0) 877a7d4b171SHans de Goede goto retry_get_irq_gpio; 878a7d4b171SHans de Goede } 879ec6e1b40SIrina Tirdea 880ec6e1b40SIrina Tirdea ts->gpiod_int = gpiod; 881ec6e1b40SIrina Tirdea 882ec6e1b40SIrina Tirdea /* Get the reset line GPIO pin number */ 883ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, GPIOD_IN); 884ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 885ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 886ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 887ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 888ec6e1b40SIrina Tirdea GOODIX_GPIO_RST_NAME, error); 889ec6e1b40SIrina Tirdea return error; 890ec6e1b40SIrina Tirdea } 891ec6e1b40SIrina Tirdea 892ec6e1b40SIrina Tirdea ts->gpiod_rst = gpiod; 893ec6e1b40SIrina Tirdea 894a7d4b171SHans de Goede switch (ts->irq_pin_access_method) { 895a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 896a7d4b171SHans de Goede /* 897a7d4b171SHans de Goede * We end up here if goodix_add_acpi_gpio_mappings() has 898a7d4b171SHans de Goede * called devm_acpi_dev_add_driver_gpios() because the ACPI 899a7d4b171SHans de Goede * tables did not contain name to index mappings. 900a7d4b171SHans de Goede * Check that we successfully got both GPIOs after we've 901a7d4b171SHans de Goede * added our own acpi_gpio_mapping and if we did not get both 902a7d4b171SHans de Goede * GPIOs reset irq_pin_access_method to IRQ_PIN_ACCESS_NONE. 903a7d4b171SHans de Goede */ 904a7d4b171SHans de Goede if (!ts->gpiod_int || !ts->gpiod_rst) 905a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 906a7d4b171SHans de Goede break; 907c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 908c5fca485SHans de Goede if (!ts->gpiod_rst) 909c5fca485SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 910c5fca485SHans de Goede break; 911a7d4b171SHans de Goede default: 912e070a97bSHans de Goede if (ts->gpiod_int && ts->gpiod_rst) { 9131921daceSHans de Goede ts->reset_controller_at_probe = true; 914e070a97bSHans de Goede ts->load_cfg_from_disk = true; 91549db3997SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_GPIO; 916e070a97bSHans de Goede } 917a7d4b171SHans de Goede } 91849db3997SHans de Goede 919ec6e1b40SIrina Tirdea return 0; 920ec6e1b40SIrina Tirdea } 921ec6e1b40SIrina Tirdea 922ca96ea86SBastien Nocera /** 923ca96ea86SBastien Nocera * goodix_read_config - Read the embedded configuration of the panel 924ca96ea86SBastien Nocera * 925ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 926ca96ea86SBastien Nocera * 927ca96ea86SBastien Nocera * Must be called during probe 928ca96ea86SBastien Nocera */ 929ca96ea86SBastien Nocera static void goodix_read_config(struct goodix_ts_data *ts) 930ca96ea86SBastien Nocera { 931fafef982SMarcin Niestroj int x_max, y_max; 932ca96ea86SBastien Nocera int error; 933ca96ea86SBastien Nocera 93425309004SMarcin Niestroj error = goodix_i2c_read(ts->client, ts->chip->config_addr, 935de956caeSHans de Goede ts->config, ts->chip->config_len); 936ca96ea86SBastien Nocera if (error) { 937fafef982SMarcin Niestroj dev_warn(&ts->client->dev, "Error reading config: %d\n", 938ca96ea86SBastien Nocera error); 939ca96ea86SBastien Nocera ts->int_trigger_type = GOODIX_INT_TRIGGER; 940a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 941ca96ea86SBastien Nocera return; 942ca96ea86SBastien Nocera } 943ca96ea86SBastien Nocera 944de956caeSHans de Goede ts->int_trigger_type = ts->config[TRIGGER_LOC] & 0x03; 945de956caeSHans de Goede ts->max_touch_num = ts->config[MAX_CONTACTS_LOC] & 0x0f; 9468b5a359cSBastien Nocera 947de956caeSHans de Goede x_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC]); 948de956caeSHans de Goede y_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC + 2]); 949fafef982SMarcin Niestroj if (x_max && y_max) { 950fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_X, x_max - 1); 951fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_Y, y_max - 1); 952ca96ea86SBastien Nocera } 953de956caeSHans de Goede 954de956caeSHans de Goede ts->chip->calc_config_checksum(ts); 95557c80e8eSKarsten Merker } 956ca96ea86SBastien Nocera 957ca96ea86SBastien Nocera /** 958ca96ea86SBastien Nocera * goodix_read_version - Read goodix touchscreen version 959ca96ea86SBastien Nocera * 96068caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 961ca96ea86SBastien Nocera */ 96268caf858SIrina Tirdea static int goodix_read_version(struct goodix_ts_data *ts) 963ca96ea86SBastien Nocera { 964ca96ea86SBastien Nocera int error; 965ca96ea86SBastien Nocera u8 buf[6]; 966cae102e2SIcenowy Zheng char id_str[GOODIX_ID_MAX_LEN + 1]; 967ca96ea86SBastien Nocera 96868caf858SIrina Tirdea error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf)); 969ca96ea86SBastien Nocera if (error) { 97068caf858SIrina Tirdea dev_err(&ts->client->dev, "read version failed: %d\n", error); 971ca96ea86SBastien Nocera return error; 972ca96ea86SBastien Nocera } 973ca96ea86SBastien Nocera 974cae102e2SIcenowy Zheng memcpy(id_str, buf, GOODIX_ID_MAX_LEN); 975cae102e2SIcenowy Zheng id_str[GOODIX_ID_MAX_LEN] = 0; 976cae102e2SIcenowy Zheng strscpy(ts->id, id_str, GOODIX_ID_MAX_LEN + 1); 977e70b0307SIrina Tirdea 97868caf858SIrina Tirdea ts->version = get_unaligned_le16(&buf[4]); 979ca96ea86SBastien Nocera 980cae102e2SIcenowy Zheng dev_info(&ts->client->dev, "ID %s, version: %04x\n", ts->id, 98168caf858SIrina Tirdea ts->version); 982ca96ea86SBastien Nocera 983ca96ea86SBastien Nocera return 0; 984ca96ea86SBastien Nocera } 985ca96ea86SBastien Nocera 986ca96ea86SBastien Nocera /** 987ca96ea86SBastien Nocera * goodix_i2c_test - I2C test function to check if the device answers. 988ca96ea86SBastien Nocera * 989ca96ea86SBastien Nocera * @client: the i2c client 990ca96ea86SBastien Nocera */ 991ca96ea86SBastien Nocera static int goodix_i2c_test(struct i2c_client *client) 992ca96ea86SBastien Nocera { 993ca96ea86SBastien Nocera int retry = 0; 994ca96ea86SBastien Nocera int error; 995ca96ea86SBastien Nocera u8 test; 996ca96ea86SBastien Nocera 997ca96ea86SBastien Nocera while (retry++ < 2) { 99825309004SMarcin Niestroj error = goodix_i2c_read(client, GOODIX_REG_ID, 999ca96ea86SBastien Nocera &test, 1); 1000ca96ea86SBastien Nocera if (!error) 1001ca96ea86SBastien Nocera return 0; 1002ca96ea86SBastien Nocera 1003ca96ea86SBastien Nocera dev_err(&client->dev, "i2c test failed attempt %d: %d\n", 1004ca96ea86SBastien Nocera retry, error); 1005ca96ea86SBastien Nocera msleep(20); 1006ca96ea86SBastien Nocera } 1007ca96ea86SBastien Nocera 1008ca96ea86SBastien Nocera return error; 1009ca96ea86SBastien Nocera } 1010ca96ea86SBastien Nocera 1011ca96ea86SBastien Nocera /** 101268caf858SIrina Tirdea * goodix_configure_dev - Finish device initialization 101368caf858SIrina Tirdea * 101468caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 101568caf858SIrina Tirdea * 101668caf858SIrina Tirdea * Must be called from probe to finish initialization of the device. 101768caf858SIrina Tirdea * Contains the common initialization code for both devices that 101868caf858SIrina Tirdea * declare gpio pins and devices that do not. It is either called 101968caf858SIrina Tirdea * directly from probe or from request_firmware_wait callback. 102068caf858SIrina Tirdea */ 102168caf858SIrina Tirdea static int goodix_configure_dev(struct goodix_ts_data *ts) 102268caf858SIrina Tirdea { 102368caf858SIrina Tirdea int error; 1024492ee52cSDmitry Mastykin int i; 102568caf858SIrina Tirdea 1026fafef982SMarcin Niestroj ts->int_trigger_type = GOODIX_INT_TRIGGER; 1027fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 1028ad48cf5eSKarsten Merker 1029fafef982SMarcin Niestroj ts->input_dev = devm_input_allocate_device(&ts->client->dev); 1030fafef982SMarcin Niestroj if (!ts->input_dev) { 1031fafef982SMarcin Niestroj dev_err(&ts->client->dev, "Failed to allocate input device."); 1032fafef982SMarcin Niestroj return -ENOMEM; 1033fafef982SMarcin Niestroj } 1034fafef982SMarcin Niestroj 1035fafef982SMarcin Niestroj ts->input_dev->name = "Goodix Capacitive TouchScreen"; 1036fafef982SMarcin Niestroj ts->input_dev->phys = "input/ts"; 1037fafef982SMarcin Niestroj ts->input_dev->id.bustype = BUS_I2C; 1038fafef982SMarcin Niestroj ts->input_dev->id.vendor = 0x0416; 1039cae102e2SIcenowy Zheng if (kstrtou16(ts->id, 10, &ts->input_dev->id.product)) 1040cae102e2SIcenowy Zheng ts->input_dev->id.product = 0x1001; 1041fafef982SMarcin Niestroj ts->input_dev->id.version = ts->version; 1042fafef982SMarcin Niestroj 1043492ee52cSDmitry Mastykin ts->input_dev->keycode = ts->keymap; 1044492ee52cSDmitry Mastykin ts->input_dev->keycodesize = sizeof(ts->keymap[0]); 1045492ee52cSDmitry Mastykin ts->input_dev->keycodemax = GOODIX_MAX_KEYS; 1046492ee52cSDmitry Mastykin 1047fafef982SMarcin Niestroj /* Capacitive Windows/Home button on some devices */ 1048492ee52cSDmitry Mastykin for (i = 0; i < GOODIX_MAX_KEYS; ++i) { 1049492ee52cSDmitry Mastykin if (i == 0) 1050492ee52cSDmitry Mastykin ts->keymap[i] = KEY_LEFTMETA; 1051492ee52cSDmitry Mastykin else 1052492ee52cSDmitry Mastykin ts->keymap[i] = KEY_F1 + (i - 1); 1053492ee52cSDmitry Mastykin 1054492ee52cSDmitry Mastykin input_set_capability(ts->input_dev, EV_KEY, ts->keymap[i]); 1055492ee52cSDmitry Mastykin } 1056fafef982SMarcin Niestroj 1057fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X); 1058fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y); 1059fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 1060fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 1061fafef982SMarcin Niestroj 1062fafef982SMarcin Niestroj /* Read configuration and apply touchscreen parameters */ 106368caf858SIrina Tirdea goodix_read_config(ts); 106468caf858SIrina Tirdea 1065fafef982SMarcin Niestroj /* Try overriding touchscreen parameters via device properties */ 1066fafef982SMarcin Niestroj touchscreen_parse_properties(ts->input_dev, true, &ts->prop); 1067fafef982SMarcin Niestroj 1068fafef982SMarcin Niestroj if (!ts->prop.max_x || !ts->prop.max_y || !ts->max_touch_num) { 1069c1c00aa5SGuido Günther dev_err(&ts->client->dev, 1070c1c00aa5SGuido Günther "Invalid config (%d, %d, %d), using defaults\n", 1071c1c00aa5SGuido Günther ts->prop.max_x, ts->prop.max_y, ts->max_touch_num); 1072fafef982SMarcin Niestroj ts->prop.max_x = GOODIX_MAX_WIDTH - 1; 1073fafef982SMarcin Niestroj ts->prop.max_y = GOODIX_MAX_HEIGHT - 1; 1074fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 1075fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 1076fafef982SMarcin Niestroj ABS_MT_POSITION_X, ts->prop.max_x); 1077fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 1078fafef982SMarcin Niestroj ABS_MT_POSITION_Y, ts->prop.max_y); 1079fafef982SMarcin Niestroj } 1080fafef982SMarcin Niestroj 1081fafef982SMarcin Niestroj if (dmi_check_system(rotated_screen)) { 1082fafef982SMarcin Niestroj ts->prop.invert_x = true; 1083fafef982SMarcin Niestroj ts->prop.invert_y = true; 1084fafef982SMarcin Niestroj dev_dbg(&ts->client->dev, 1085fafef982SMarcin Niestroj "Applying '180 degrees rotated screen' quirk\n"); 1086fafef982SMarcin Niestroj } 1087fafef982SMarcin Niestroj 1088bd3b8480SYauhen Kharuzhy if (dmi_check_system(nine_bytes_report)) { 1089bd3b8480SYauhen Kharuzhy ts->contact_size = 9; 1090bd3b8480SYauhen Kharuzhy 1091bd3b8480SYauhen Kharuzhy dev_dbg(&ts->client->dev, 1092bd3b8480SYauhen Kharuzhy "Non-standard 9-bytes report format quirk\n"); 1093bd3b8480SYauhen Kharuzhy } 1094bd3b8480SYauhen Kharuzhy 10951dd5ddc1SSergei A. Trusov if (dmi_check_system(inverted_x_screen)) { 10961dd5ddc1SSergei A. Trusov ts->prop.invert_x = true; 10971dd5ddc1SSergei A. Trusov dev_dbg(&ts->client->dev, 10981dd5ddc1SSergei A. Trusov "Applying 'inverted x screen' quirk\n"); 10991dd5ddc1SSergei A. Trusov } 11001dd5ddc1SSergei A. Trusov 1101fafef982SMarcin Niestroj error = input_mt_init_slots(ts->input_dev, ts->max_touch_num, 1102fafef982SMarcin Niestroj INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); 1103fafef982SMarcin Niestroj if (error) { 1104fafef982SMarcin Niestroj dev_err(&ts->client->dev, 1105fafef982SMarcin Niestroj "Failed to initialize MT slots: %d", error); 110668caf858SIrina Tirdea return error; 1107fafef982SMarcin Niestroj } 1108fafef982SMarcin Niestroj 1109fafef982SMarcin Niestroj error = input_register_device(ts->input_dev); 1110fafef982SMarcin Niestroj if (error) { 1111fafef982SMarcin Niestroj dev_err(&ts->client->dev, 1112fafef982SMarcin Niestroj "Failed to register input device: %d", error); 1113fafef982SMarcin Niestroj return error; 1114fafef982SMarcin Niestroj } 111568caf858SIrina Tirdea 11165ab09d6aSIrina Tirdea ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT; 11175ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 111868caf858SIrina Tirdea if (error) { 111968caf858SIrina Tirdea dev_err(&ts->client->dev, "request IRQ failed: %d\n", error); 112068caf858SIrina Tirdea return error; 112168caf858SIrina Tirdea } 112268caf858SIrina Tirdea 112368caf858SIrina Tirdea return 0; 112468caf858SIrina Tirdea } 112568caf858SIrina Tirdea 112668caf858SIrina Tirdea /** 112768caf858SIrina Tirdea * goodix_config_cb - Callback to finish device init 112868caf858SIrina Tirdea * 112968caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 113068caf858SIrina Tirdea * 113168caf858SIrina Tirdea * request_firmware_wait callback that finishes 113268caf858SIrina Tirdea * initialization of the device. 113368caf858SIrina Tirdea */ 113468caf858SIrina Tirdea static void goodix_config_cb(const struct firmware *cfg, void *ctx) 113568caf858SIrina Tirdea { 113668caf858SIrina Tirdea struct goodix_ts_data *ts = ctx; 113768caf858SIrina Tirdea int error; 113868caf858SIrina Tirdea 113968caf858SIrina Tirdea if (cfg) { 114068caf858SIrina Tirdea /* send device configuration to the firmware */ 11411a67448fSHans de Goede error = goodix_send_cfg(ts, cfg->data, cfg->size); 114268caf858SIrina Tirdea if (error) 114368caf858SIrina Tirdea goto err_release_cfg; 114468caf858SIrina Tirdea } 114568caf858SIrina Tirdea 114668caf858SIrina Tirdea goodix_configure_dev(ts); 114768caf858SIrina Tirdea 114868caf858SIrina Tirdea err_release_cfg: 114968caf858SIrina Tirdea release_firmware(cfg); 115068caf858SIrina Tirdea complete_all(&ts->firmware_loading_complete); 115168caf858SIrina Tirdea } 115268caf858SIrina Tirdea 1153ae97fb58SJagan Teki static void goodix_disable_regulators(void *arg) 1154ae97fb58SJagan Teki { 1155ae97fb58SJagan Teki struct goodix_ts_data *ts = arg; 1156ae97fb58SJagan Teki 1157ae97fb58SJagan Teki regulator_disable(ts->vddio); 1158ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1159ae97fb58SJagan Teki } 1160ae97fb58SJagan Teki 1161ca96ea86SBastien Nocera static int goodix_ts_probe(struct i2c_client *client, 1162ca96ea86SBastien Nocera const struct i2c_device_id *id) 1163ca96ea86SBastien Nocera { 1164ca96ea86SBastien Nocera struct goodix_ts_data *ts; 1165ca96ea86SBastien Nocera int error; 1166ca96ea86SBastien Nocera 1167ca96ea86SBastien Nocera dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr); 1168ca96ea86SBastien Nocera 1169ca96ea86SBastien Nocera if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 1170ca96ea86SBastien Nocera dev_err(&client->dev, "I2C check functionality failed.\n"); 1171ca96ea86SBastien Nocera return -ENXIO; 1172ca96ea86SBastien Nocera } 1173ca96ea86SBastien Nocera 1174ca96ea86SBastien Nocera ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); 1175ca96ea86SBastien Nocera if (!ts) 1176ca96ea86SBastien Nocera return -ENOMEM; 1177ca96ea86SBastien Nocera 1178ca96ea86SBastien Nocera ts->client = client; 1179ca96ea86SBastien Nocera i2c_set_clientdata(client, ts); 118068caf858SIrina Tirdea init_completion(&ts->firmware_loading_complete); 1181bd3b8480SYauhen Kharuzhy ts->contact_size = GOODIX_CONTACT_SIZE; 1182ca96ea86SBastien Nocera 1183ec6e1b40SIrina Tirdea error = goodix_get_gpio_config(ts); 1184ec6e1b40SIrina Tirdea if (error) 1185ec6e1b40SIrina Tirdea return error; 1186ec6e1b40SIrina Tirdea 1187ae97fb58SJagan Teki /* power up the controller */ 1188ae97fb58SJagan Teki error = regulator_enable(ts->avdd28); 1189ae97fb58SJagan Teki if (error) { 1190ae97fb58SJagan Teki dev_err(&client->dev, 1191ae97fb58SJagan Teki "Failed to enable AVDD28 regulator: %d\n", 1192ae97fb58SJagan Teki error); 1193ae97fb58SJagan Teki return error; 1194ae97fb58SJagan Teki } 1195ae97fb58SJagan Teki 1196ae97fb58SJagan Teki error = regulator_enable(ts->vddio); 1197ae97fb58SJagan Teki if (error) { 1198ae97fb58SJagan Teki dev_err(&client->dev, 1199ae97fb58SJagan Teki "Failed to enable VDDIO regulator: %d\n", 1200ae97fb58SJagan Teki error); 1201ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1202ae97fb58SJagan Teki return error; 1203ae97fb58SJagan Teki } 1204ae97fb58SJagan Teki 1205ae97fb58SJagan Teki error = devm_add_action_or_reset(&client->dev, 1206ae97fb58SJagan Teki goodix_disable_regulators, ts); 1207ae97fb58SJagan Teki if (error) 1208ae97fb58SJagan Teki return error; 1209ae97fb58SJagan Teki 12109e1f2d70SHans de Goede reset: 12111921daceSHans de Goede if (ts->reset_controller_at_probe) { 1212ec6e1b40SIrina Tirdea /* reset the controller */ 1213ec6e1b40SIrina Tirdea error = goodix_reset(ts); 1214ec6e1b40SIrina Tirdea if (error) { 1215ec6e1b40SIrina Tirdea dev_err(&client->dev, "Controller reset failed.\n"); 1216ec6e1b40SIrina Tirdea return error; 1217ec6e1b40SIrina Tirdea } 1218ec6e1b40SIrina Tirdea } 1219ec6e1b40SIrina Tirdea 1220ca96ea86SBastien Nocera error = goodix_i2c_test(client); 1221ca96ea86SBastien Nocera if (error) { 12229e1f2d70SHans de Goede if (!ts->reset_controller_at_probe && 12239e1f2d70SHans de Goede ts->irq_pin_access_method != IRQ_PIN_ACCESS_NONE) { 12249e1f2d70SHans de Goede /* Retry after a controller reset */ 12259e1f2d70SHans de Goede ts->reset_controller_at_probe = true; 12269e1f2d70SHans de Goede goto reset; 12279e1f2d70SHans de Goede } 1228ca96ea86SBastien Nocera dev_err(&client->dev, "I2C communication failure: %d\n", error); 1229ca96ea86SBastien Nocera return error; 1230ca96ea86SBastien Nocera } 1231ca96ea86SBastien Nocera 123268caf858SIrina Tirdea error = goodix_read_version(ts); 1233ca96ea86SBastien Nocera if (error) { 1234ca96ea86SBastien Nocera dev_err(&client->dev, "Read version failed.\n"); 1235ca96ea86SBastien Nocera return error; 1236ca96ea86SBastien Nocera } 1237ca96ea86SBastien Nocera 123825309004SMarcin Niestroj ts->chip = goodix_get_chip_data(ts->id); 1239a779fbc6SIrina Tirdea 1240e070a97bSHans de Goede if (ts->load_cfg_from_disk) { 124168caf858SIrina Tirdea /* update device config */ 124268caf858SIrina Tirdea ts->cfg_name = devm_kasprintf(&client->dev, GFP_KERNEL, 1243cae102e2SIcenowy Zheng "goodix_%s_cfg.bin", ts->id); 124468caf858SIrina Tirdea if (!ts->cfg_name) 124568caf858SIrina Tirdea return -ENOMEM; 1246ca96ea86SBastien Nocera 124768caf858SIrina Tirdea error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name, 124868caf858SIrina Tirdea &client->dev, GFP_KERNEL, ts, 124968caf858SIrina Tirdea goodix_config_cb); 1250ca96ea86SBastien Nocera if (error) { 125168caf858SIrina Tirdea dev_err(&client->dev, 125268caf858SIrina Tirdea "Failed to invoke firmware loader: %d\n", 125368caf858SIrina Tirdea error); 1254ca96ea86SBastien Nocera return error; 1255ca96ea86SBastien Nocera } 1256ca96ea86SBastien Nocera 1257ca96ea86SBastien Nocera return 0; 125868caf858SIrina Tirdea } else { 125968caf858SIrina Tirdea error = goodix_configure_dev(ts); 126068caf858SIrina Tirdea if (error) 126168caf858SIrina Tirdea return error; 126268caf858SIrina Tirdea } 126368caf858SIrina Tirdea 126468caf858SIrina Tirdea return 0; 126568caf858SIrina Tirdea } 126668caf858SIrina Tirdea 126768caf858SIrina Tirdea static int goodix_ts_remove(struct i2c_client *client) 126868caf858SIrina Tirdea { 126968caf858SIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 127068caf858SIrina Tirdea 1271e070a97bSHans de Goede if (ts->load_cfg_from_disk) 127268caf858SIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 127368caf858SIrina Tirdea 127468caf858SIrina Tirdea return 0; 1275ca96ea86SBastien Nocera } 1276ca96ea86SBastien Nocera 12775ab09d6aSIrina Tirdea static int __maybe_unused goodix_suspend(struct device *dev) 12785ab09d6aSIrina Tirdea { 12795ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 12805ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 12815ab09d6aSIrina Tirdea int error; 12825ab09d6aSIrina Tirdea 1283e070a97bSHans de Goede if (ts->load_cfg_from_disk) 1284e070a97bSHans de Goede wait_for_completion(&ts->firmware_loading_complete); 1285e070a97bSHans de Goede 12865ab09d6aSIrina Tirdea /* We need gpio pins to suspend/resume */ 128749db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1288faec44b6SHans de Goede disable_irq(client->irq); 12895ab09d6aSIrina Tirdea return 0; 1290faec44b6SHans de Goede } 12915ab09d6aSIrina Tirdea 12925ab09d6aSIrina Tirdea /* Free IRQ as IRQ pin is used as output in the suspend sequence */ 12935ab09d6aSIrina Tirdea goodix_free_irq(ts); 12945ab09d6aSIrina Tirdea 12955ab09d6aSIrina Tirdea /* Output LOW on the INT pin for 5 ms */ 129649db3997SHans de Goede error = goodix_irq_direction_output(ts, 0); 12975ab09d6aSIrina Tirdea if (error) { 12985ab09d6aSIrina Tirdea goodix_request_irq(ts); 12995ab09d6aSIrina Tirdea return error; 13005ab09d6aSIrina Tirdea } 13015ab09d6aSIrina Tirdea 13025ab09d6aSIrina Tirdea usleep_range(5000, 6000); 13035ab09d6aSIrina Tirdea 13045ab09d6aSIrina Tirdea error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND, 13055ab09d6aSIrina Tirdea GOODIX_CMD_SCREEN_OFF); 13065ab09d6aSIrina Tirdea if (error) { 13075ab09d6aSIrina Tirdea dev_err(&ts->client->dev, "Screen off command failed\n"); 130849db3997SHans de Goede goodix_irq_direction_input(ts); 13095ab09d6aSIrina Tirdea goodix_request_irq(ts); 13105ab09d6aSIrina Tirdea return -EAGAIN; 13115ab09d6aSIrina Tirdea } 13125ab09d6aSIrina Tirdea 13135ab09d6aSIrina Tirdea /* 13145ab09d6aSIrina Tirdea * The datasheet specifies that the interval between sending screen-off 13155ab09d6aSIrina Tirdea * command and wake-up should be longer than 58 ms. To avoid waking up 13165ab09d6aSIrina Tirdea * sooner, delay 58ms here. 13175ab09d6aSIrina Tirdea */ 13185ab09d6aSIrina Tirdea msleep(58); 13195ab09d6aSIrina Tirdea return 0; 13205ab09d6aSIrina Tirdea } 13215ab09d6aSIrina Tirdea 13225ab09d6aSIrina Tirdea static int __maybe_unused goodix_resume(struct device *dev) 13235ab09d6aSIrina Tirdea { 13245ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 13255ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 1326273ec6bdSHans de Goede u8 config_ver; 13275ab09d6aSIrina Tirdea int error; 13285ab09d6aSIrina Tirdea 132949db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1330faec44b6SHans de Goede enable_irq(client->irq); 13315ab09d6aSIrina Tirdea return 0; 1332faec44b6SHans de Goede } 13335ab09d6aSIrina Tirdea 13345ab09d6aSIrina Tirdea /* 13355ab09d6aSIrina Tirdea * Exit sleep mode by outputting HIGH level to INT pin 13365ab09d6aSIrina Tirdea * for 2ms~5ms. 13375ab09d6aSIrina Tirdea */ 133849db3997SHans de Goede error = goodix_irq_direction_output(ts, 1); 13395ab09d6aSIrina Tirdea if (error) 13405ab09d6aSIrina Tirdea return error; 13415ab09d6aSIrina Tirdea 13425ab09d6aSIrina Tirdea usleep_range(2000, 5000); 13435ab09d6aSIrina Tirdea 13445ab09d6aSIrina Tirdea error = goodix_int_sync(ts); 13455ab09d6aSIrina Tirdea if (error) 13465ab09d6aSIrina Tirdea return error; 13475ab09d6aSIrina Tirdea 1348273ec6bdSHans de Goede error = goodix_i2c_read(ts->client, ts->chip->config_addr, 1349273ec6bdSHans de Goede &config_ver, 1); 1350273ec6bdSHans de Goede if (error) 1351273ec6bdSHans de Goede dev_warn(dev, "Error reading config version: %d, resetting controller\n", 1352273ec6bdSHans de Goede error); 1353273ec6bdSHans de Goede else if (config_ver != ts->config[0]) 1354273ec6bdSHans de Goede dev_info(dev, "Config version mismatch %d != %d, resetting controller\n", 1355273ec6bdSHans de Goede config_ver, ts->config[0]); 1356273ec6bdSHans de Goede 1357273ec6bdSHans de Goede if (error != 0 || config_ver != ts->config[0]) { 1358273ec6bdSHans de Goede error = goodix_reset(ts); 1359273ec6bdSHans de Goede if (error) { 1360273ec6bdSHans de Goede dev_err(dev, "Controller reset failed.\n"); 1361273ec6bdSHans de Goede return error; 1362273ec6bdSHans de Goede } 1363273ec6bdSHans de Goede 1364273ec6bdSHans de Goede error = goodix_send_cfg(ts, ts->config, ts->chip->config_len); 1365273ec6bdSHans de Goede if (error) 1366273ec6bdSHans de Goede return error; 1367273ec6bdSHans de Goede } 1368273ec6bdSHans de Goede 13695ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 13705ab09d6aSIrina Tirdea if (error) 13715ab09d6aSIrina Tirdea return error; 13725ab09d6aSIrina Tirdea 13735ab09d6aSIrina Tirdea return 0; 13745ab09d6aSIrina Tirdea } 13755ab09d6aSIrina Tirdea 13765ab09d6aSIrina Tirdea static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume); 13775ab09d6aSIrina Tirdea 1378ca96ea86SBastien Nocera static const struct i2c_device_id goodix_ts_id[] = { 1379ca96ea86SBastien Nocera { "GDIX1001:00", 0 }, 1380ca96ea86SBastien Nocera { } 1381ca96ea86SBastien Nocera }; 13822e9e910eSJavier Martinez Canillas MODULE_DEVICE_TABLE(i2c, goodix_ts_id); 1383ca96ea86SBastien Nocera 1384771d8f1bSAleksei Mamlin #ifdef CONFIG_ACPI 1385ca96ea86SBastien Nocera static const struct acpi_device_id goodix_acpi_match[] = { 1386ca96ea86SBastien Nocera { "GDIX1001", 0 }, 13875ca4d1aeSEthan Lee { "GDIX1002", 0 }, 1388ca96ea86SBastien Nocera { } 1389ca96ea86SBastien Nocera }; 1390ca96ea86SBastien Nocera MODULE_DEVICE_TABLE(acpi, goodix_acpi_match); 1391771d8f1bSAleksei Mamlin #endif 1392771d8f1bSAleksei Mamlin 1393771d8f1bSAleksei Mamlin #ifdef CONFIG_OF 1394771d8f1bSAleksei Mamlin static const struct of_device_id goodix_of_match[] = { 139525309004SMarcin Niestroj { .compatible = "goodix,gt1151" }, 1396a5f50c50SJagan Teki { .compatible = "goodix,gt5663" }, 139784ef1b33SGuido Günther { .compatible = "goodix,gt5688" }, 1398771d8f1bSAleksei Mamlin { .compatible = "goodix,gt911" }, 1399771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9110" }, 1400771d8f1bSAleksei Mamlin { .compatible = "goodix,gt912" }, 1401b5e458afSIcenowy Zheng { .compatible = "goodix,gt917s" }, 1402771d8f1bSAleksei Mamlin { .compatible = "goodix,gt927" }, 1403771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9271" }, 1404771d8f1bSAleksei Mamlin { .compatible = "goodix,gt928" }, 1405771d8f1bSAleksei Mamlin { .compatible = "goodix,gt967" }, 1406771d8f1bSAleksei Mamlin { } 1407771d8f1bSAleksei Mamlin }; 1408771d8f1bSAleksei Mamlin MODULE_DEVICE_TABLE(of, goodix_of_match); 1409771d8f1bSAleksei Mamlin #endif 1410ca96ea86SBastien Nocera 1411ca96ea86SBastien Nocera static struct i2c_driver goodix_ts_driver = { 1412ca96ea86SBastien Nocera .probe = goodix_ts_probe, 141368caf858SIrina Tirdea .remove = goodix_ts_remove, 1414ca96ea86SBastien Nocera .id_table = goodix_ts_id, 1415ca96ea86SBastien Nocera .driver = { 1416ca96ea86SBastien Nocera .name = "Goodix-TS", 1417771d8f1bSAleksei Mamlin .acpi_match_table = ACPI_PTR(goodix_acpi_match), 1418771d8f1bSAleksei Mamlin .of_match_table = of_match_ptr(goodix_of_match), 14195ab09d6aSIrina Tirdea .pm = &goodix_pm_ops, 1420ca96ea86SBastien Nocera }, 1421ca96ea86SBastien Nocera }; 1422ca96ea86SBastien Nocera module_i2c_driver(goodix_ts_driver); 1423ca96ea86SBastien Nocera 1424ca96ea86SBastien Nocera MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); 1425ca96ea86SBastien Nocera MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>"); 1426ca96ea86SBastien Nocera MODULE_DESCRIPTION("Goodix touchscreen driver"); 1427ca96ea86SBastien Nocera MODULE_LICENSE("GPL v2"); 1428