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 82ca96ea86SBastien Nocera struct goodix_ts_data { 83ca96ea86SBastien Nocera struct i2c_client *client; 84ca96ea86SBastien Nocera struct input_dev *input_dev; 8525309004SMarcin Niestroj const struct goodix_chip_data *chip; 86fafef982SMarcin Niestroj struct touchscreen_properties prop; 87ca96ea86SBastien Nocera unsigned int max_touch_num; 88ca96ea86SBastien Nocera unsigned int int_trigger_type; 89ae97fb58SJagan Teki struct regulator *avdd28; 90ae97fb58SJagan Teki struct regulator *vddio; 91ec6e1b40SIrina Tirdea struct gpio_desc *gpiod_int; 92ec6e1b40SIrina Tirdea struct gpio_desc *gpiod_rst; 93a7d4b171SHans de Goede int gpio_count; 94a7d4b171SHans de Goede int gpio_int_idx; 9568caf858SIrina Tirdea u16 id; 9668caf858SIrina Tirdea u16 version; 9768caf858SIrina Tirdea const char *cfg_name; 981921daceSHans de Goede bool reset_controller_at_probe; 99e070a97bSHans de Goede bool load_cfg_from_disk; 10068caf858SIrina Tirdea struct completion firmware_loading_complete; 1015ab09d6aSIrina Tirdea unsigned long irq_flags; 10249db3997SHans de Goede enum goodix_irq_pin_access_method irq_pin_access_method; 103bd3b8480SYauhen Kharuzhy unsigned int contact_size; 104de956caeSHans de Goede u8 config[GOODIX_CONFIG_MAX_LENGTH]; 105492ee52cSDmitry Mastykin unsigned short keymap[GOODIX_MAX_KEYS]; 106ca96ea86SBastien Nocera }; 107ca96ea86SBastien Nocera 10825309004SMarcin Niestroj static int goodix_check_cfg_8(struct goodix_ts_data *ts, 1091a67448fSHans de Goede const u8 *cfg, int len); 11025309004SMarcin Niestroj static int goodix_check_cfg_16(struct goodix_ts_data *ts, 1111a67448fSHans de Goede const u8 *cfg, int len); 112de956caeSHans de Goede static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts); 113de956caeSHans de Goede static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts); 11425309004SMarcin Niestroj 11525309004SMarcin Niestroj static const struct goodix_chip_data gt1x_chip_data = { 11625309004SMarcin Niestroj .config_addr = GOODIX_GT1X_REG_CONFIG_DATA, 117686e8a24SHans de Goede .config_len = GOODIX_CONFIG_GT9X_LENGTH, 11825309004SMarcin Niestroj .check_config = goodix_check_cfg_16, 119de956caeSHans de Goede .calc_config_checksum = goodix_calc_cfg_checksum_16, 12025309004SMarcin Niestroj }; 12125309004SMarcin Niestroj 12225309004SMarcin Niestroj static const struct goodix_chip_data gt911_chip_data = { 12325309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 12425309004SMarcin Niestroj .config_len = GOODIX_CONFIG_911_LENGTH, 12525309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 126de956caeSHans de Goede .calc_config_checksum = goodix_calc_cfg_checksum_8, 12725309004SMarcin Niestroj }; 12825309004SMarcin Niestroj 12925309004SMarcin Niestroj static const struct goodix_chip_data gt967_chip_data = { 13025309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 13125309004SMarcin Niestroj .config_len = GOODIX_CONFIG_967_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 gt9x_chip_data = { 13725309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 138686e8a24SHans de Goede .config_len = GOODIX_CONFIG_GT9X_LENGTH, 13925309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 140de956caeSHans de Goede .calc_config_checksum = goodix_calc_cfg_checksum_8, 14125309004SMarcin Niestroj }; 14225309004SMarcin Niestroj 143ca96ea86SBastien Nocera static const unsigned long goodix_irq_flags[] = { 144ca96ea86SBastien Nocera IRQ_TYPE_EDGE_RISING, 145ca96ea86SBastien Nocera IRQ_TYPE_EDGE_FALLING, 146ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_LOW, 147ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_HIGH, 148ca96ea86SBastien Nocera }; 149ca96ea86SBastien Nocera 1508b5a359cSBastien Nocera /* 1518b5a359cSBastien Nocera * Those tablets have their coordinates origin at the bottom right 1528b5a359cSBastien Nocera * of the tablet, as if rotated 180 degrees 1538b5a359cSBastien Nocera */ 1548b5a359cSBastien Nocera static const struct dmi_system_id rotated_screen[] = { 1558b5a359cSBastien Nocera #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1568b5a359cSBastien Nocera { 157df5b5e55SHans de Goede .ident = "Teclast X89", 158df5b5e55SHans de Goede .matches = { 159df5b5e55SHans de Goede /* tPAD is too generic, also match on bios date */ 160df5b5e55SHans de Goede DMI_MATCH(DMI_BOARD_VENDOR, "TECLAST"), 161df5b5e55SHans de Goede DMI_MATCH(DMI_BOARD_NAME, "tPAD"), 162df5b5e55SHans de Goede DMI_MATCH(DMI_BIOS_DATE, "12/19/2014"), 163df5b5e55SHans de Goede }, 164df5b5e55SHans de Goede }, 165df5b5e55SHans de Goede { 1668b5a359cSBastien Nocera .ident = "WinBook TW100", 1678b5a359cSBastien Nocera .matches = { 1688b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 1698b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW100") 1708b5a359cSBastien Nocera } 1718b5a359cSBastien Nocera }, 1728b5a359cSBastien Nocera { 1738b5a359cSBastien Nocera .ident = "WinBook TW700", 1748b5a359cSBastien Nocera .matches = { 1758b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 1768b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW700") 1778b5a359cSBastien Nocera }, 1788b5a359cSBastien Nocera }, 1798b5a359cSBastien Nocera #endif 1808b5a359cSBastien Nocera {} 1818b5a359cSBastien Nocera }; 1828b5a359cSBastien Nocera 183bd3b8480SYauhen Kharuzhy static const struct dmi_system_id nine_bytes_report[] = { 184bd3b8480SYauhen Kharuzhy #if defined(CONFIG_DMI) && defined(CONFIG_X86) 185bd3b8480SYauhen Kharuzhy { 186bd3b8480SYauhen Kharuzhy .ident = "Lenovo YogaBook", 187bd3b8480SYauhen Kharuzhy /* YB1-X91L/F and YB1-X90L/F */ 188bd3b8480SYauhen Kharuzhy .matches = { 189bd3b8480SYauhen Kharuzhy DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X9") 190bd3b8480SYauhen Kharuzhy } 191bd3b8480SYauhen Kharuzhy }, 192bd3b8480SYauhen Kharuzhy #endif 193bd3b8480SYauhen Kharuzhy {} 194bd3b8480SYauhen Kharuzhy }; 195bd3b8480SYauhen Kharuzhy 1961dd5ddc1SSergei A. Trusov /* 1971dd5ddc1SSergei A. Trusov * Those tablets have their x coordinate inverted 1981dd5ddc1SSergei A. Trusov */ 1991dd5ddc1SSergei A. Trusov static const struct dmi_system_id inverted_x_screen[] = { 2001dd5ddc1SSergei A. Trusov #if defined(CONFIG_DMI) && defined(CONFIG_X86) 2011dd5ddc1SSergei A. Trusov { 2021dd5ddc1SSergei A. Trusov .ident = "Cube I15-TC", 2031dd5ddc1SSergei A. Trusov .matches = { 2041dd5ddc1SSergei A. Trusov DMI_MATCH(DMI_SYS_VENDOR, "Cube"), 2051dd5ddc1SSergei A. Trusov DMI_MATCH(DMI_PRODUCT_NAME, "I15-TC") 2061dd5ddc1SSergei A. Trusov }, 2071dd5ddc1SSergei A. Trusov }, 2081dd5ddc1SSergei A. Trusov #endif 2091dd5ddc1SSergei A. Trusov {} 2101dd5ddc1SSergei A. Trusov }; 2111dd5ddc1SSergei A. Trusov 212ca96ea86SBastien Nocera /** 213ca96ea86SBastien Nocera * goodix_i2c_read - read data from a register of the i2c slave device. 214ca96ea86SBastien Nocera * 215ca96ea86SBastien Nocera * @client: i2c device. 216ca96ea86SBastien Nocera * @reg: the register to read from. 217ca96ea86SBastien Nocera * @buf: raw write data buffer. 218ca96ea86SBastien Nocera * @len: length of the buffer to write 219ca96ea86SBastien Nocera */ 220ca96ea86SBastien Nocera static int goodix_i2c_read(struct i2c_client *client, 221ca96ea86SBastien Nocera u16 reg, u8 *buf, int len) 222ca96ea86SBastien Nocera { 223ca96ea86SBastien Nocera struct i2c_msg msgs[2]; 224fafef982SMarcin Niestroj __be16 wbuf = cpu_to_be16(reg); 225ca96ea86SBastien Nocera int ret; 226ca96ea86SBastien Nocera 227ca96ea86SBastien Nocera msgs[0].flags = 0; 228ca96ea86SBastien Nocera msgs[0].addr = client->addr; 229ca96ea86SBastien Nocera msgs[0].len = 2; 230ca96ea86SBastien Nocera msgs[0].buf = (u8 *)&wbuf; 231ca96ea86SBastien Nocera 232ca96ea86SBastien Nocera msgs[1].flags = I2C_M_RD; 233ca96ea86SBastien Nocera msgs[1].addr = client->addr; 234ca96ea86SBastien Nocera msgs[1].len = len; 235ca96ea86SBastien Nocera msgs[1].buf = buf; 236ca96ea86SBastien Nocera 237ca96ea86SBastien Nocera ret = i2c_transfer(client->adapter, msgs, 2); 238ca96ea86SBastien Nocera return ret < 0 ? ret : (ret != ARRAY_SIZE(msgs) ? -EIO : 0); 239ca96ea86SBastien Nocera } 240ca96ea86SBastien Nocera 24168caf858SIrina Tirdea /** 24268caf858SIrina Tirdea * goodix_i2c_write - write data to a register of the i2c slave device. 24368caf858SIrina Tirdea * 24468caf858SIrina Tirdea * @client: i2c device. 24568caf858SIrina Tirdea * @reg: the register to write to. 24668caf858SIrina Tirdea * @buf: raw data buffer to write. 24768caf858SIrina Tirdea * @len: length of the buffer to write 24868caf858SIrina Tirdea */ 24968caf858SIrina Tirdea static int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf, 25068caf858SIrina Tirdea unsigned len) 25168caf858SIrina Tirdea { 25268caf858SIrina Tirdea u8 *addr_buf; 25368caf858SIrina Tirdea struct i2c_msg msg; 25468caf858SIrina Tirdea int ret; 25568caf858SIrina Tirdea 25668caf858SIrina Tirdea addr_buf = kmalloc(len + 2, GFP_KERNEL); 25768caf858SIrina Tirdea if (!addr_buf) 25868caf858SIrina Tirdea return -ENOMEM; 25968caf858SIrina Tirdea 26068caf858SIrina Tirdea addr_buf[0] = reg >> 8; 26168caf858SIrina Tirdea addr_buf[1] = reg & 0xFF; 26268caf858SIrina Tirdea memcpy(&addr_buf[2], buf, len); 26368caf858SIrina Tirdea 26468caf858SIrina Tirdea msg.flags = 0; 26568caf858SIrina Tirdea msg.addr = client->addr; 26668caf858SIrina Tirdea msg.buf = addr_buf; 26768caf858SIrina Tirdea msg.len = len + 2; 26868caf858SIrina Tirdea 26968caf858SIrina Tirdea ret = i2c_transfer(client->adapter, &msg, 1); 27068caf858SIrina Tirdea kfree(addr_buf); 27168caf858SIrina Tirdea return ret < 0 ? ret : (ret != 1 ? -EIO : 0); 27268caf858SIrina Tirdea } 27368caf858SIrina Tirdea 2745ab09d6aSIrina Tirdea static int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value) 2755ab09d6aSIrina Tirdea { 2765ab09d6aSIrina Tirdea return goodix_i2c_write(client, reg, &value, sizeof(value)); 2775ab09d6aSIrina Tirdea } 2785ab09d6aSIrina Tirdea 27925309004SMarcin Niestroj static const struct goodix_chip_data *goodix_get_chip_data(u16 id) 280a779fbc6SIrina Tirdea { 281a779fbc6SIrina Tirdea switch (id) { 28225309004SMarcin Niestroj case 1151: 283a5f50c50SJagan Teki case 5663: 28484ef1b33SGuido Günther case 5688: 28525309004SMarcin Niestroj return >1x_chip_data; 28625309004SMarcin Niestroj 287a779fbc6SIrina Tirdea case 911: 288a779fbc6SIrina Tirdea case 9271: 289a779fbc6SIrina Tirdea case 9110: 290a779fbc6SIrina Tirdea case 927: 291a779fbc6SIrina Tirdea case 928: 29225309004SMarcin Niestroj return >911_chip_data; 293a779fbc6SIrina Tirdea 294a779fbc6SIrina Tirdea case 912: 295a779fbc6SIrina Tirdea case 967: 29625309004SMarcin Niestroj return >967_chip_data; 297a779fbc6SIrina Tirdea 298a779fbc6SIrina Tirdea default: 29925309004SMarcin Niestroj return >9x_chip_data; 300a779fbc6SIrina Tirdea } 301a779fbc6SIrina Tirdea } 302a779fbc6SIrina Tirdea 303ca96ea86SBastien Nocera static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data) 304ca96ea86SBastien Nocera { 3059b5db7aaSPaul Cercueil unsigned long max_timeout; 306ca96ea86SBastien Nocera int touch_num; 307ca96ea86SBastien Nocera int error; 308492ee52cSDmitry Mastykin u16 addr = GOODIX_READ_COOR_ADDR; 309492ee52cSDmitry Mastykin /* 310492ee52cSDmitry Mastykin * We are going to read 1-byte header, 311492ee52cSDmitry Mastykin * ts->contact_size * max(1, touch_num) bytes of coordinates 312492ee52cSDmitry Mastykin * and 1-byte footer which contains the touch-key code. 313492ee52cSDmitry Mastykin */ 314492ee52cSDmitry Mastykin const int header_contact_keycode_size = 1 + ts->contact_size + 1; 315ca96ea86SBastien Nocera 3169b5db7aaSPaul Cercueil /* 3179b5db7aaSPaul Cercueil * The 'buffer status' bit, which indicates that the data is valid, is 3189b5db7aaSPaul Cercueil * not set as soon as the interrupt is raised, but slightly after. 3199b5db7aaSPaul Cercueil * This takes around 10 ms to happen, so we poll for 20 ms. 3209b5db7aaSPaul Cercueil */ 3219b5db7aaSPaul Cercueil max_timeout = jiffies + msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT); 3229b5db7aaSPaul Cercueil do { 323492ee52cSDmitry Mastykin error = goodix_i2c_read(ts->client, addr, data, 324492ee52cSDmitry Mastykin header_contact_keycode_size); 325ca96ea86SBastien Nocera if (error) { 3269b5db7aaSPaul Cercueil dev_err(&ts->client->dev, "I2C transfer error: %d\n", 3279b5db7aaSPaul Cercueil error); 328ca96ea86SBastien Nocera return error; 329ca96ea86SBastien Nocera } 330ca96ea86SBastien Nocera 3319b5db7aaSPaul Cercueil if (data[0] & GOODIX_BUFFER_STATUS_READY) { 332ca96ea86SBastien Nocera touch_num = data[0] & 0x0f; 333a7ac7c95SAleksei Mamlin if (touch_num > ts->max_touch_num) 334ca96ea86SBastien Nocera return -EPROTO; 335ca96ea86SBastien Nocera 336ca96ea86SBastien Nocera if (touch_num > 1) { 337492ee52cSDmitry Mastykin addr += header_contact_keycode_size; 338492ee52cSDmitry Mastykin data += header_contact_keycode_size; 339ca96ea86SBastien Nocera error = goodix_i2c_read(ts->client, 340492ee52cSDmitry Mastykin addr, data, 341bd3b8480SYauhen Kharuzhy ts->contact_size * 3429b5db7aaSPaul Cercueil (touch_num - 1)); 343ca96ea86SBastien Nocera if (error) 344ca96ea86SBastien Nocera return error; 345ca96ea86SBastien Nocera } 346ca96ea86SBastien Nocera 347ca96ea86SBastien Nocera return touch_num; 348ca96ea86SBastien Nocera } 349ca96ea86SBastien Nocera 3509b5db7aaSPaul Cercueil usleep_range(1000, 2000); /* Poll every 1 - 2 ms */ 3519b5db7aaSPaul Cercueil } while (time_before(jiffies, max_timeout)); 3529b5db7aaSPaul Cercueil 3539b5db7aaSPaul Cercueil /* 3549b5db7aaSPaul Cercueil * The Goodix panel will send spurious interrupts after a 3559b5db7aaSPaul Cercueil * 'finger up' event, which will always cause a timeout. 3569b5db7aaSPaul Cercueil */ 35724ef83f6SDmitry Mastykin return -ENOMSG; 3589b5db7aaSPaul Cercueil } 3599b5db7aaSPaul Cercueil 360bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_8b(struct goodix_ts_data *ts, u8 *coor_data) 361ca96ea86SBastien Nocera { 362ca96ea86SBastien Nocera int id = coor_data[0] & 0x0F; 363ca96ea86SBastien Nocera int input_x = get_unaligned_le16(&coor_data[1]); 364ca96ea86SBastien Nocera int input_y = get_unaligned_le16(&coor_data[3]); 365ca96ea86SBastien Nocera int input_w = get_unaligned_le16(&coor_data[5]); 366ca96ea86SBastien Nocera 367ca96ea86SBastien Nocera input_mt_slot(ts->input_dev, id); 368ca96ea86SBastien Nocera input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 369fafef982SMarcin Niestroj touchscreen_report_pos(ts->input_dev, &ts->prop, 370fafef982SMarcin Niestroj input_x, input_y, true); 371ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 372ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 373ca96ea86SBastien Nocera } 374ca96ea86SBastien Nocera 375bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_9b(struct goodix_ts_data *ts, u8 *coor_data) 376bd3b8480SYauhen Kharuzhy { 377bd3b8480SYauhen Kharuzhy int id = coor_data[1] & 0x0F; 378bd3b8480SYauhen Kharuzhy int input_x = get_unaligned_le16(&coor_data[3]); 379bd3b8480SYauhen Kharuzhy int input_y = get_unaligned_le16(&coor_data[5]); 380bd3b8480SYauhen Kharuzhy int input_w = get_unaligned_le16(&coor_data[7]); 381bd3b8480SYauhen Kharuzhy 382bd3b8480SYauhen Kharuzhy input_mt_slot(ts->input_dev, id); 383bd3b8480SYauhen Kharuzhy input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 384bd3b8480SYauhen Kharuzhy touchscreen_report_pos(ts->input_dev, &ts->prop, 385bd3b8480SYauhen Kharuzhy input_x, input_y, true); 386bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 387bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 388bd3b8480SYauhen Kharuzhy } 389bd3b8480SYauhen Kharuzhy 390492ee52cSDmitry Mastykin static void goodix_ts_report_key(struct goodix_ts_data *ts, u8 *data) 391492ee52cSDmitry Mastykin { 392492ee52cSDmitry Mastykin int touch_num; 393492ee52cSDmitry Mastykin u8 key_value; 394492ee52cSDmitry Mastykin int i; 395492ee52cSDmitry Mastykin 396492ee52cSDmitry Mastykin if (data[0] & GOODIX_HAVE_KEY) { 397492ee52cSDmitry Mastykin touch_num = data[0] & 0x0f; 398492ee52cSDmitry Mastykin key_value = data[1 + ts->contact_size * touch_num]; 399492ee52cSDmitry Mastykin for (i = 0; i < GOODIX_MAX_KEYS; i++) 400492ee52cSDmitry Mastykin if (key_value & BIT(i)) 401492ee52cSDmitry Mastykin input_report_key(ts->input_dev, 402492ee52cSDmitry Mastykin ts->keymap[i], 1); 403492ee52cSDmitry Mastykin } else { 404492ee52cSDmitry Mastykin for (i = 0; i < GOODIX_MAX_KEYS; i++) 405492ee52cSDmitry Mastykin input_report_key(ts->input_dev, ts->keymap[i], 0); 406492ee52cSDmitry Mastykin } 407492ee52cSDmitry Mastykin } 408492ee52cSDmitry Mastykin 409ca96ea86SBastien Nocera /** 410ca96ea86SBastien Nocera * goodix_process_events - Process incoming events 411ca96ea86SBastien Nocera * 412ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 413ca96ea86SBastien Nocera * 414ca96ea86SBastien Nocera * Called when the IRQ is triggered. Read the current device state, and push 415ca96ea86SBastien Nocera * the input events to the user space. 416ca96ea86SBastien Nocera */ 417ca96ea86SBastien Nocera static void goodix_process_events(struct goodix_ts_data *ts) 418ca96ea86SBastien Nocera { 419492ee52cSDmitry Mastykin u8 point_data[2 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS]; 420ca96ea86SBastien Nocera int touch_num; 421ca96ea86SBastien Nocera int i; 422ca96ea86SBastien Nocera 423ca96ea86SBastien Nocera touch_num = goodix_ts_read_input_report(ts, point_data); 424ca96ea86SBastien Nocera if (touch_num < 0) 425ca96ea86SBastien Nocera return; 426ca96ea86SBastien Nocera 427492ee52cSDmitry Mastykin goodix_ts_report_key(ts, point_data); 4284a54feeaSSergei A. Trusov 429ca96ea86SBastien Nocera for (i = 0; i < touch_num; i++) 430bd3b8480SYauhen Kharuzhy if (ts->contact_size == 9) 431bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_9b(ts, 432bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 433bd3b8480SYauhen Kharuzhy else 434bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_8b(ts, 435bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 436ca96ea86SBastien Nocera 437ca96ea86SBastien Nocera input_mt_sync_frame(ts->input_dev); 438ca96ea86SBastien Nocera input_sync(ts->input_dev); 439ca96ea86SBastien Nocera } 440ca96ea86SBastien Nocera 441ca96ea86SBastien Nocera /** 442ca96ea86SBastien Nocera * goodix_ts_irq_handler - The IRQ handler 443ca96ea86SBastien Nocera * 444ca96ea86SBastien Nocera * @irq: interrupt number. 445ca96ea86SBastien Nocera * @dev_id: private data pointer. 446ca96ea86SBastien Nocera */ 447ca96ea86SBastien Nocera static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id) 448ca96ea86SBastien Nocera { 449ca96ea86SBastien Nocera struct goodix_ts_data *ts = dev_id; 450ca96ea86SBastien Nocera 451ca96ea86SBastien Nocera goodix_process_events(ts); 452ca96ea86SBastien Nocera 4535d655b35SIrina Tirdea if (goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0) < 0) 454ca96ea86SBastien Nocera dev_err(&ts->client->dev, "I2C write end_cmd error\n"); 455ca96ea86SBastien Nocera 456ca96ea86SBastien Nocera return IRQ_HANDLED; 457ca96ea86SBastien Nocera } 458ca96ea86SBastien Nocera 4595ab09d6aSIrina Tirdea static void goodix_free_irq(struct goodix_ts_data *ts) 4605ab09d6aSIrina Tirdea { 4615ab09d6aSIrina Tirdea devm_free_irq(&ts->client->dev, ts->client->irq, ts); 4625ab09d6aSIrina Tirdea } 4635ab09d6aSIrina Tirdea 4645ab09d6aSIrina Tirdea static int goodix_request_irq(struct goodix_ts_data *ts) 4655ab09d6aSIrina Tirdea { 4665ab09d6aSIrina Tirdea return devm_request_threaded_irq(&ts->client->dev, ts->client->irq, 4675ab09d6aSIrina Tirdea NULL, goodix_ts_irq_handler, 4685ab09d6aSIrina Tirdea ts->irq_flags, ts->client->name, ts); 4695ab09d6aSIrina Tirdea } 4705ab09d6aSIrina Tirdea 4711a67448fSHans de Goede static int goodix_check_cfg_8(struct goodix_ts_data *ts, const u8 *cfg, int len) 47268caf858SIrina Tirdea { 4731a67448fSHans de Goede int i, raw_cfg_len = len - 2; 47468caf858SIrina Tirdea u8 check_sum = 0; 47568caf858SIrina Tirdea 47668caf858SIrina Tirdea for (i = 0; i < raw_cfg_len; i++) 4771a67448fSHans de Goede check_sum += cfg[i]; 47868caf858SIrina Tirdea check_sum = (~check_sum) + 1; 4791a67448fSHans de Goede if (check_sum != cfg[raw_cfg_len]) { 48068caf858SIrina Tirdea dev_err(&ts->client->dev, 48168caf858SIrina Tirdea "The checksum of the config fw is not correct"); 48268caf858SIrina Tirdea return -EINVAL; 48368caf858SIrina Tirdea } 48468caf858SIrina Tirdea 4851a67448fSHans de Goede if (cfg[raw_cfg_len + 1] != 1) { 48668caf858SIrina Tirdea dev_err(&ts->client->dev, 48768caf858SIrina Tirdea "Config fw must have Config_Fresh register set"); 48868caf858SIrina Tirdea return -EINVAL; 48968caf858SIrina Tirdea } 49068caf858SIrina Tirdea 49168caf858SIrina Tirdea return 0; 49268caf858SIrina Tirdea } 49368caf858SIrina Tirdea 494de956caeSHans de Goede static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts) 495de956caeSHans de Goede { 496de956caeSHans de Goede int i, raw_cfg_len = ts->chip->config_len - 2; 497de956caeSHans de Goede u8 check_sum = 0; 498de956caeSHans de Goede 499de956caeSHans de Goede for (i = 0; i < raw_cfg_len; i++) 500de956caeSHans de Goede check_sum += ts->config[i]; 501de956caeSHans de Goede check_sum = (~check_sum) + 1; 502de956caeSHans de Goede 503de956caeSHans de Goede ts->config[raw_cfg_len] = check_sum; 504de956caeSHans de Goede ts->config[raw_cfg_len + 1] = 1; /* Set "config_fresh" bit */ 505de956caeSHans de Goede } 506de956caeSHans de Goede 5071a67448fSHans de Goede static int goodix_check_cfg_16(struct goodix_ts_data *ts, const u8 *cfg, 5081a67448fSHans de Goede int len) 50925309004SMarcin Niestroj { 5101a67448fSHans de Goede int i, raw_cfg_len = len - 3; 51125309004SMarcin Niestroj u16 check_sum = 0; 51225309004SMarcin Niestroj 51325309004SMarcin Niestroj for (i = 0; i < raw_cfg_len; i += 2) 5141a67448fSHans de Goede check_sum += get_unaligned_be16(&cfg[i]); 51525309004SMarcin Niestroj check_sum = (~check_sum) + 1; 5161a67448fSHans de Goede if (check_sum != get_unaligned_be16(&cfg[raw_cfg_len])) { 51725309004SMarcin Niestroj dev_err(&ts->client->dev, 51825309004SMarcin Niestroj "The checksum of the config fw is not correct"); 51925309004SMarcin Niestroj return -EINVAL; 52025309004SMarcin Niestroj } 52125309004SMarcin Niestroj 5221a67448fSHans de Goede if (cfg[raw_cfg_len + 2] != 1) { 52325309004SMarcin Niestroj dev_err(&ts->client->dev, 52425309004SMarcin Niestroj "Config fw must have Config_Fresh register set"); 52525309004SMarcin Niestroj return -EINVAL; 52625309004SMarcin Niestroj } 52725309004SMarcin Niestroj 52825309004SMarcin Niestroj return 0; 52925309004SMarcin Niestroj } 53025309004SMarcin Niestroj 531de956caeSHans de Goede static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts) 532de956caeSHans de Goede { 533de956caeSHans de Goede int i, raw_cfg_len = ts->chip->config_len - 3; 534de956caeSHans de Goede u16 check_sum = 0; 535de956caeSHans de Goede 536de956caeSHans de Goede for (i = 0; i < raw_cfg_len; i += 2) 537de956caeSHans de Goede check_sum += get_unaligned_be16(&ts->config[i]); 538de956caeSHans de Goede check_sum = (~check_sum) + 1; 539de956caeSHans de Goede 540de956caeSHans de Goede put_unaligned_be16(check_sum, &ts->config[raw_cfg_len]); 541de956caeSHans de Goede ts->config[raw_cfg_len + 2] = 1; /* Set "config_fresh" bit */ 542de956caeSHans de Goede } 543de956caeSHans de Goede 54425309004SMarcin Niestroj /** 54525309004SMarcin Niestroj * goodix_check_cfg - Checks if config fw is valid 54625309004SMarcin Niestroj * 54725309004SMarcin Niestroj * @ts: goodix_ts_data pointer 54825309004SMarcin Niestroj * @cfg: firmware config data 54925309004SMarcin Niestroj */ 5501a67448fSHans de Goede static int goodix_check_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) 55125309004SMarcin Niestroj { 5521a67448fSHans de Goede if (len < GOODIX_CONFIG_MIN_LENGTH || 5531a67448fSHans de Goede len > GOODIX_CONFIG_MAX_LENGTH) { 55425309004SMarcin Niestroj dev_err(&ts->client->dev, 55525309004SMarcin Niestroj "The length of the config fw is not correct"); 55625309004SMarcin Niestroj return -EINVAL; 55725309004SMarcin Niestroj } 55825309004SMarcin Niestroj 5591a67448fSHans de Goede return ts->chip->check_config(ts, cfg, len); 56025309004SMarcin Niestroj } 56125309004SMarcin Niestroj 56268caf858SIrina Tirdea /** 56368caf858SIrina Tirdea * goodix_send_cfg - Write fw config to device 56468caf858SIrina Tirdea * 56568caf858SIrina Tirdea * @ts: goodix_ts_data pointer 56668caf858SIrina Tirdea * @cfg: config firmware to write to device 56768caf858SIrina Tirdea */ 5681a67448fSHans de Goede static int goodix_send_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) 56968caf858SIrina Tirdea { 57068caf858SIrina Tirdea int error; 57168caf858SIrina Tirdea 5721a67448fSHans de Goede error = goodix_check_cfg(ts, cfg, len); 57368caf858SIrina Tirdea if (error) 57468caf858SIrina Tirdea return error; 57568caf858SIrina Tirdea 5761a67448fSHans de Goede error = goodix_i2c_write(ts->client, ts->chip->config_addr, cfg, len); 57768caf858SIrina Tirdea if (error) { 57868caf858SIrina Tirdea dev_err(&ts->client->dev, "Failed to write config data: %d", 57968caf858SIrina Tirdea error); 58068caf858SIrina Tirdea return error; 58168caf858SIrina Tirdea } 58268caf858SIrina Tirdea dev_dbg(&ts->client->dev, "Config sent successfully."); 58368caf858SIrina Tirdea 58468caf858SIrina Tirdea /* Let the firmware reconfigure itself, so sleep for 10ms */ 58568caf858SIrina Tirdea usleep_range(10000, 11000); 58668caf858SIrina Tirdea 58768caf858SIrina Tirdea return 0; 58868caf858SIrina Tirdea } 58968caf858SIrina Tirdea 59049db3997SHans de Goede static int goodix_irq_direction_output(struct goodix_ts_data *ts, 59149db3997SHans de Goede int value) 59249db3997SHans de Goede { 593c5fca485SHans de Goede struct device *dev = &ts->client->dev; 594c5fca485SHans de Goede acpi_status status; 595c5fca485SHans de Goede 59649db3997SHans de Goede switch (ts->irq_pin_access_method) { 59749db3997SHans de Goede case IRQ_PIN_ACCESS_NONE: 59849db3997SHans de Goede dev_err(&ts->client->dev, 59949db3997SHans de Goede "%s called without an irq_pin_access_method set\n", 60049db3997SHans de Goede __func__); 60149db3997SHans de Goede return -EINVAL; 60249db3997SHans de Goede case IRQ_PIN_ACCESS_GPIO: 60349db3997SHans de Goede return gpiod_direction_output(ts->gpiod_int, value); 604a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 605a7d4b171SHans de Goede /* 606a7d4b171SHans de Goede * The IRQ pin triggers on a falling edge, so its gets marked 607a7d4b171SHans de Goede * as active-low, use output_raw to avoid the value inversion. 608a7d4b171SHans de Goede */ 609a7d4b171SHans de Goede return gpiod_direction_output_raw(ts->gpiod_int, value); 610c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 611c5fca485SHans de Goede status = acpi_execute_simple_method(ACPI_HANDLE(dev), 612c5fca485SHans de Goede "INTO", value); 613c5fca485SHans de Goede return ACPI_SUCCESS(status) ? 0 : -EIO; 61449db3997SHans de Goede } 61549db3997SHans de Goede 61649db3997SHans de Goede return -EINVAL; /* Never reached */ 61749db3997SHans de Goede } 61849db3997SHans de Goede 61949db3997SHans de Goede static int goodix_irq_direction_input(struct goodix_ts_data *ts) 62049db3997SHans de Goede { 621c5fca485SHans de Goede struct device *dev = &ts->client->dev; 622c5fca485SHans de Goede acpi_status status; 623c5fca485SHans de Goede 62449db3997SHans de Goede switch (ts->irq_pin_access_method) { 62549db3997SHans de Goede case IRQ_PIN_ACCESS_NONE: 62649db3997SHans de Goede dev_err(&ts->client->dev, 62749db3997SHans de Goede "%s called without an irq_pin_access_method set\n", 62849db3997SHans de Goede __func__); 62949db3997SHans de Goede return -EINVAL; 63049db3997SHans de Goede case IRQ_PIN_ACCESS_GPIO: 631a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 63249db3997SHans de Goede return gpiod_direction_input(ts->gpiod_int); 633c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 634c5fca485SHans de Goede status = acpi_evaluate_object(ACPI_HANDLE(dev), "INTI", 635c5fca485SHans de Goede NULL, NULL); 636c5fca485SHans de Goede return ACPI_SUCCESS(status) ? 0 : -EIO; 63749db3997SHans de Goede } 63849db3997SHans de Goede 63949db3997SHans de Goede return -EINVAL; /* Never reached */ 64049db3997SHans de Goede } 64149db3997SHans de Goede 642ec6e1b40SIrina Tirdea static int goodix_int_sync(struct goodix_ts_data *ts) 643ec6e1b40SIrina Tirdea { 644ec6e1b40SIrina Tirdea int error; 645ec6e1b40SIrina Tirdea 64649db3997SHans de Goede error = goodix_irq_direction_output(ts, 0); 647ec6e1b40SIrina Tirdea if (error) 648ec6e1b40SIrina Tirdea return error; 649ec6e1b40SIrina Tirdea 650ec6e1b40SIrina Tirdea msleep(50); /* T5: 50ms */ 651ec6e1b40SIrina Tirdea 65249db3997SHans de Goede error = goodix_irq_direction_input(ts); 653ec6e1b40SIrina Tirdea if (error) 654ec6e1b40SIrina Tirdea return error; 655ec6e1b40SIrina Tirdea 656ec6e1b40SIrina Tirdea return 0; 657ec6e1b40SIrina Tirdea } 658ec6e1b40SIrina Tirdea 659ec6e1b40SIrina Tirdea /** 660ec6e1b40SIrina Tirdea * goodix_reset - Reset device during power on 661ec6e1b40SIrina Tirdea * 662ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 663ec6e1b40SIrina Tirdea */ 664ec6e1b40SIrina Tirdea static int goodix_reset(struct goodix_ts_data *ts) 665ec6e1b40SIrina Tirdea { 666ec6e1b40SIrina Tirdea int error; 667ec6e1b40SIrina Tirdea 668ec6e1b40SIrina Tirdea /* begin select I2C slave addr */ 669ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 0); 670ec6e1b40SIrina Tirdea if (error) 671ec6e1b40SIrina Tirdea return error; 672ec6e1b40SIrina Tirdea 673ec6e1b40SIrina Tirdea msleep(20); /* T2: > 10ms */ 674ec6e1b40SIrina Tirdea 675ec6e1b40SIrina Tirdea /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */ 67649db3997SHans de Goede error = goodix_irq_direction_output(ts, ts->client->addr == 0x14); 677ec6e1b40SIrina Tirdea if (error) 678ec6e1b40SIrina Tirdea return error; 679ec6e1b40SIrina Tirdea 680ec6e1b40SIrina Tirdea usleep_range(100, 2000); /* T3: > 100us */ 681ec6e1b40SIrina Tirdea 682ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 1); 683ec6e1b40SIrina Tirdea if (error) 684ec6e1b40SIrina Tirdea return error; 685ec6e1b40SIrina Tirdea 686ec6e1b40SIrina Tirdea usleep_range(6000, 10000); /* T4: > 5ms */ 687ec6e1b40SIrina Tirdea 688ec6e1b40SIrina Tirdea /* end select I2C slave addr */ 689ec6e1b40SIrina Tirdea error = gpiod_direction_input(ts->gpiod_rst); 690ec6e1b40SIrina Tirdea if (error) 691ec6e1b40SIrina Tirdea return error; 692ec6e1b40SIrina Tirdea 693ec6e1b40SIrina Tirdea error = goodix_int_sync(ts); 694ec6e1b40SIrina Tirdea if (error) 695ec6e1b40SIrina Tirdea return error; 696ec6e1b40SIrina Tirdea 697ec6e1b40SIrina Tirdea return 0; 698ec6e1b40SIrina Tirdea } 699ec6e1b40SIrina Tirdea 700a7d4b171SHans de Goede #if defined CONFIG_X86 && defined CONFIG_ACPI 70167abd9eeSHans de Goede #include <asm/cpu_device_id.h> 70267abd9eeSHans de Goede #include <asm/intel-family.h> 70367abd9eeSHans de Goede 70467abd9eeSHans de Goede static const struct x86_cpu_id baytrail_cpu_ids[] = { 70567abd9eeSHans de Goede { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT, X86_FEATURE_ANY, }, 70667abd9eeSHans de Goede {} 70767abd9eeSHans de Goede }; 70867abd9eeSHans de Goede 70967abd9eeSHans de Goede static inline bool is_byt(void) 71067abd9eeSHans de Goede { 71167abd9eeSHans de Goede const struct x86_cpu_id *id = x86_match_cpu(baytrail_cpu_ids); 71267abd9eeSHans de Goede 71367abd9eeSHans de Goede return !!id; 71467abd9eeSHans de Goede } 71567abd9eeSHans de Goede 716a7d4b171SHans de Goede static const struct acpi_gpio_params first_gpio = { 0, 0, false }; 717a7d4b171SHans de Goede static const struct acpi_gpio_params second_gpio = { 1, 0, false }; 718a7d4b171SHans de Goede 719a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_first_gpios[] = { 720a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &first_gpio, 1 }, 721a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &second_gpio, 1 }, 722a7d4b171SHans de Goede { }, 723a7d4b171SHans de Goede }; 724a7d4b171SHans de Goede 725a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_last_gpios[] = { 726a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 727a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &second_gpio, 1 }, 728a7d4b171SHans de Goede { }, 729a7d4b171SHans de Goede }; 730a7d4b171SHans de Goede 731c5fca485SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_reset_only_gpios[] = { 732c5fca485SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 733c5fca485SHans de Goede { }, 734c5fca485SHans de Goede }; 735c5fca485SHans de Goede 736a7d4b171SHans de Goede static int goodix_resource(struct acpi_resource *ares, void *data) 737a7d4b171SHans de Goede { 738a7d4b171SHans de Goede struct goodix_ts_data *ts = data; 739a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 740a7d4b171SHans de Goede struct acpi_resource_gpio *gpio; 741a7d4b171SHans de Goede 742a7d4b171SHans de Goede switch (ares->type) { 743a7d4b171SHans de Goede case ACPI_RESOURCE_TYPE_GPIO: 744a7d4b171SHans de Goede gpio = &ares->data.gpio; 745a7d4b171SHans de Goede if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { 746a7d4b171SHans de Goede if (ts->gpio_int_idx == -1) { 747a7d4b171SHans de Goede ts->gpio_int_idx = ts->gpio_count; 748a7d4b171SHans de Goede } else { 749a7d4b171SHans de Goede dev_err(dev, "More then one GpioInt resource, ignoring ACPI GPIO resources\n"); 750a7d4b171SHans de Goede ts->gpio_int_idx = -2; 751a7d4b171SHans de Goede } 752a7d4b171SHans de Goede } 753a7d4b171SHans de Goede ts->gpio_count++; 754a7d4b171SHans de Goede break; 755a7d4b171SHans de Goede default: 756a7d4b171SHans de Goede break; 757a7d4b171SHans de Goede } 758a7d4b171SHans de Goede 759a7d4b171SHans de Goede return 0; 760a7d4b171SHans de Goede } 761a7d4b171SHans de Goede 762a7d4b171SHans de Goede /* 763a7d4b171SHans de Goede * This function gets called in case we fail to get the irq GPIO directly 764a7d4b171SHans de Goede * because the ACPI tables lack GPIO-name to APCI _CRS index mappings 765a7d4b171SHans de Goede * (no _DSD UUID daffd814-6eba-4d8c-8a91-bc9bbf4aa301 data). 766a7d4b171SHans de Goede * In that case we add our own mapping and then goodix_get_gpio_config() 767a7d4b171SHans de Goede * retries to get the GPIOs based on the added mapping. 768a7d4b171SHans de Goede */ 769a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 770a7d4b171SHans de Goede { 771a7d4b171SHans de Goede const struct acpi_gpio_mapping *gpio_mapping = NULL; 772a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 773a7d4b171SHans de Goede LIST_HEAD(resources); 774a7d4b171SHans de Goede int ret; 775a7d4b171SHans de Goede 776a7d4b171SHans de Goede ts->gpio_count = 0; 777a7d4b171SHans de Goede ts->gpio_int_idx = -1; 778a7d4b171SHans de Goede ret = acpi_dev_get_resources(ACPI_COMPANION(dev), &resources, 779a7d4b171SHans de Goede goodix_resource, ts); 780a7d4b171SHans de Goede if (ret < 0) { 781a7d4b171SHans de Goede dev_err(dev, "Error getting ACPI resources: %d\n", ret); 782a7d4b171SHans de Goede return ret; 783a7d4b171SHans de Goede } 784a7d4b171SHans de Goede 785a7d4b171SHans de Goede acpi_dev_free_resource_list(&resources); 786a7d4b171SHans de Goede 787a7d4b171SHans de Goede if (ts->gpio_count == 2 && ts->gpio_int_idx == 0) { 788a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 789a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_first_gpios; 790a7d4b171SHans de Goede } else if (ts->gpio_count == 2 && ts->gpio_int_idx == 1) { 791a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 792a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_last_gpios; 793c5fca485SHans de Goede } else if (ts->gpio_count == 1 && ts->gpio_int_idx == -1 && 794c5fca485SHans de Goede acpi_has_method(ACPI_HANDLE(dev), "INTI") && 795c5fca485SHans de Goede acpi_has_method(ACPI_HANDLE(dev), "INTO")) { 796c5fca485SHans de Goede dev_info(dev, "Using ACPI INTI and INTO methods for IRQ pin access\n"); 797c5fca485SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_METHOD; 798c5fca485SHans de Goede gpio_mapping = acpi_goodix_reset_only_gpios; 79967abd9eeSHans de Goede } else if (is_byt() && ts->gpio_count == 2 && ts->gpio_int_idx == -1) { 80067abd9eeSHans de Goede dev_info(dev, "No ACPI GpioInt resource, assuming that the GPIO order is reset, int\n"); 80167abd9eeSHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 80267abd9eeSHans de Goede gpio_mapping = acpi_goodix_int_last_gpios; 803a7d4b171SHans de Goede } else { 804a7d4b171SHans de Goede dev_warn(dev, "Unexpected ACPI resources: gpio_count %d, gpio_int_idx %d\n", 805a7d4b171SHans de Goede ts->gpio_count, ts->gpio_int_idx); 806a7d4b171SHans de Goede return -EINVAL; 807a7d4b171SHans de Goede } 808a7d4b171SHans de Goede 809a7d4b171SHans de Goede return devm_acpi_dev_add_driver_gpios(dev, gpio_mapping); 810a7d4b171SHans de Goede } 811a7d4b171SHans de Goede #else 812a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 813a7d4b171SHans de Goede { 814a7d4b171SHans de Goede return -EINVAL; 815a7d4b171SHans de Goede } 816a7d4b171SHans de Goede #endif /* CONFIG_X86 && CONFIG_ACPI */ 817a7d4b171SHans de Goede 818ec6e1b40SIrina Tirdea /** 819ec6e1b40SIrina Tirdea * goodix_get_gpio_config - Get GPIO config from ACPI/DT 820ec6e1b40SIrina Tirdea * 821ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 822ec6e1b40SIrina Tirdea */ 823ec6e1b40SIrina Tirdea static int goodix_get_gpio_config(struct goodix_ts_data *ts) 824ec6e1b40SIrina Tirdea { 825ec6e1b40SIrina Tirdea int error; 826ec6e1b40SIrina Tirdea struct device *dev; 827ec6e1b40SIrina Tirdea struct gpio_desc *gpiod; 828a7d4b171SHans de Goede bool added_acpi_mappings = false; 829ec6e1b40SIrina Tirdea 830ec6e1b40SIrina Tirdea if (!ts->client) 831ec6e1b40SIrina Tirdea return -EINVAL; 832ec6e1b40SIrina Tirdea dev = &ts->client->dev; 833ec6e1b40SIrina Tirdea 834ae97fb58SJagan Teki ts->avdd28 = devm_regulator_get(dev, "AVDD28"); 835ae97fb58SJagan Teki if (IS_ERR(ts->avdd28)) { 836ae97fb58SJagan Teki error = PTR_ERR(ts->avdd28); 837ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 838ae97fb58SJagan Teki dev_err(dev, 839ae97fb58SJagan Teki "Failed to get AVDD28 regulator: %d\n", error); 840ae97fb58SJagan Teki return error; 841ae97fb58SJagan Teki } 842ae97fb58SJagan Teki 843ae97fb58SJagan Teki ts->vddio = devm_regulator_get(dev, "VDDIO"); 844ae97fb58SJagan Teki if (IS_ERR(ts->vddio)) { 845ae97fb58SJagan Teki error = PTR_ERR(ts->vddio); 846ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 847ae97fb58SJagan Teki dev_err(dev, 848ae97fb58SJagan Teki "Failed to get VDDIO regulator: %d\n", error); 849ae97fb58SJagan Teki return error; 850ae97fb58SJagan Teki } 851ae97fb58SJagan Teki 852a7d4b171SHans de Goede retry_get_irq_gpio: 853ec6e1b40SIrina Tirdea /* Get the interrupt GPIO pin number */ 854ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN); 855ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 856ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 857ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 858ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 859ec6e1b40SIrina Tirdea GOODIX_GPIO_INT_NAME, error); 860ec6e1b40SIrina Tirdea return error; 861ec6e1b40SIrina Tirdea } 862a7d4b171SHans de Goede if (!gpiod && has_acpi_companion(dev) && !added_acpi_mappings) { 863a7d4b171SHans de Goede added_acpi_mappings = true; 864a7d4b171SHans de Goede if (goodix_add_acpi_gpio_mappings(ts) == 0) 865a7d4b171SHans de Goede goto retry_get_irq_gpio; 866a7d4b171SHans de Goede } 867ec6e1b40SIrina Tirdea 868ec6e1b40SIrina Tirdea ts->gpiod_int = gpiod; 869ec6e1b40SIrina Tirdea 870ec6e1b40SIrina Tirdea /* Get the reset line GPIO pin number */ 871ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, GPIOD_IN); 872ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 873ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 874ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 875ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 876ec6e1b40SIrina Tirdea GOODIX_GPIO_RST_NAME, error); 877ec6e1b40SIrina Tirdea return error; 878ec6e1b40SIrina Tirdea } 879ec6e1b40SIrina Tirdea 880ec6e1b40SIrina Tirdea ts->gpiod_rst = gpiod; 881ec6e1b40SIrina Tirdea 882a7d4b171SHans de Goede switch (ts->irq_pin_access_method) { 883a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 884a7d4b171SHans de Goede /* 885a7d4b171SHans de Goede * We end up here if goodix_add_acpi_gpio_mappings() has 886a7d4b171SHans de Goede * called devm_acpi_dev_add_driver_gpios() because the ACPI 887a7d4b171SHans de Goede * tables did not contain name to index mappings. 888a7d4b171SHans de Goede * Check that we successfully got both GPIOs after we've 889a7d4b171SHans de Goede * added our own acpi_gpio_mapping and if we did not get both 890a7d4b171SHans de Goede * GPIOs reset irq_pin_access_method to IRQ_PIN_ACCESS_NONE. 891a7d4b171SHans de Goede */ 892a7d4b171SHans de Goede if (!ts->gpiod_int || !ts->gpiod_rst) 893a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 894a7d4b171SHans de Goede break; 895c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 896c5fca485SHans de Goede if (!ts->gpiod_rst) 897c5fca485SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 898c5fca485SHans de Goede break; 899a7d4b171SHans de Goede default: 900e070a97bSHans de Goede if (ts->gpiod_int && ts->gpiod_rst) { 9011921daceSHans de Goede ts->reset_controller_at_probe = true; 902e070a97bSHans de Goede ts->load_cfg_from_disk = true; 90349db3997SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_GPIO; 904e070a97bSHans de Goede } 905a7d4b171SHans de Goede } 90649db3997SHans de Goede 907ec6e1b40SIrina Tirdea return 0; 908ec6e1b40SIrina Tirdea } 909ec6e1b40SIrina Tirdea 910ca96ea86SBastien Nocera /** 911ca96ea86SBastien Nocera * goodix_read_config - Read the embedded configuration of the panel 912ca96ea86SBastien Nocera * 913ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 914ca96ea86SBastien Nocera * 915ca96ea86SBastien Nocera * Must be called during probe 916ca96ea86SBastien Nocera */ 917ca96ea86SBastien Nocera static void goodix_read_config(struct goodix_ts_data *ts) 918ca96ea86SBastien Nocera { 919fafef982SMarcin Niestroj int x_max, y_max; 920ca96ea86SBastien Nocera int error; 921ca96ea86SBastien Nocera 92225309004SMarcin Niestroj error = goodix_i2c_read(ts->client, ts->chip->config_addr, 923de956caeSHans de Goede ts->config, ts->chip->config_len); 924ca96ea86SBastien Nocera if (error) { 925fafef982SMarcin Niestroj dev_warn(&ts->client->dev, "Error reading config: %d\n", 926ca96ea86SBastien Nocera error); 927ca96ea86SBastien Nocera ts->int_trigger_type = GOODIX_INT_TRIGGER; 928a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 929ca96ea86SBastien Nocera return; 930ca96ea86SBastien Nocera } 931ca96ea86SBastien Nocera 932de956caeSHans de Goede ts->int_trigger_type = ts->config[TRIGGER_LOC] & 0x03; 933de956caeSHans de Goede ts->max_touch_num = ts->config[MAX_CONTACTS_LOC] & 0x0f; 9348b5a359cSBastien Nocera 935de956caeSHans de Goede x_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC]); 936de956caeSHans de Goede y_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC + 2]); 937fafef982SMarcin Niestroj if (x_max && y_max) { 938fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_X, x_max - 1); 939fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_Y, y_max - 1); 940ca96ea86SBastien Nocera } 941de956caeSHans de Goede 942de956caeSHans de Goede ts->chip->calc_config_checksum(ts); 94357c80e8eSKarsten Merker } 944ca96ea86SBastien Nocera 945ca96ea86SBastien Nocera /** 946ca96ea86SBastien Nocera * goodix_read_version - Read goodix touchscreen version 947ca96ea86SBastien Nocera * 94868caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 949ca96ea86SBastien Nocera */ 95068caf858SIrina Tirdea static int goodix_read_version(struct goodix_ts_data *ts) 951ca96ea86SBastien Nocera { 952ca96ea86SBastien Nocera int error; 953ca96ea86SBastien Nocera u8 buf[6]; 954e70b0307SIrina Tirdea char id_str[5]; 955ca96ea86SBastien Nocera 95668caf858SIrina Tirdea error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf)); 957ca96ea86SBastien Nocera if (error) { 95868caf858SIrina Tirdea dev_err(&ts->client->dev, "read version failed: %d\n", error); 959ca96ea86SBastien Nocera return error; 960ca96ea86SBastien Nocera } 961ca96ea86SBastien Nocera 962e70b0307SIrina Tirdea memcpy(id_str, buf, 4); 963e70b0307SIrina Tirdea id_str[4] = 0; 96468caf858SIrina Tirdea if (kstrtou16(id_str, 10, &ts->id)) 96568caf858SIrina Tirdea ts->id = 0x1001; 966e70b0307SIrina Tirdea 96768caf858SIrina Tirdea ts->version = get_unaligned_le16(&buf[4]); 968ca96ea86SBastien Nocera 96968caf858SIrina Tirdea dev_info(&ts->client->dev, "ID %d, version: %04x\n", ts->id, 97068caf858SIrina Tirdea ts->version); 971ca96ea86SBastien Nocera 972ca96ea86SBastien Nocera return 0; 973ca96ea86SBastien Nocera } 974ca96ea86SBastien Nocera 975ca96ea86SBastien Nocera /** 976ca96ea86SBastien Nocera * goodix_i2c_test - I2C test function to check if the device answers. 977ca96ea86SBastien Nocera * 978ca96ea86SBastien Nocera * @client: the i2c client 979ca96ea86SBastien Nocera */ 980ca96ea86SBastien Nocera static int goodix_i2c_test(struct i2c_client *client) 981ca96ea86SBastien Nocera { 982ca96ea86SBastien Nocera int retry = 0; 983ca96ea86SBastien Nocera int error; 984ca96ea86SBastien Nocera u8 test; 985ca96ea86SBastien Nocera 986ca96ea86SBastien Nocera while (retry++ < 2) { 98725309004SMarcin Niestroj error = goodix_i2c_read(client, GOODIX_REG_ID, 988ca96ea86SBastien Nocera &test, 1); 989ca96ea86SBastien Nocera if (!error) 990ca96ea86SBastien Nocera return 0; 991ca96ea86SBastien Nocera 992ca96ea86SBastien Nocera dev_err(&client->dev, "i2c test failed attempt %d: %d\n", 993ca96ea86SBastien Nocera retry, error); 994ca96ea86SBastien Nocera msleep(20); 995ca96ea86SBastien Nocera } 996ca96ea86SBastien Nocera 997ca96ea86SBastien Nocera return error; 998ca96ea86SBastien Nocera } 999ca96ea86SBastien Nocera 1000ca96ea86SBastien Nocera /** 100168caf858SIrina Tirdea * goodix_configure_dev - Finish device initialization 100268caf858SIrina Tirdea * 100368caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 100468caf858SIrina Tirdea * 100568caf858SIrina Tirdea * Must be called from probe to finish initialization of the device. 100668caf858SIrina Tirdea * Contains the common initialization code for both devices that 100768caf858SIrina Tirdea * declare gpio pins and devices that do not. It is either called 100868caf858SIrina Tirdea * directly from probe or from request_firmware_wait callback. 100968caf858SIrina Tirdea */ 101068caf858SIrina Tirdea static int goodix_configure_dev(struct goodix_ts_data *ts) 101168caf858SIrina Tirdea { 101268caf858SIrina Tirdea int error; 1013492ee52cSDmitry Mastykin int i; 101468caf858SIrina Tirdea 1015fafef982SMarcin Niestroj ts->int_trigger_type = GOODIX_INT_TRIGGER; 1016fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 1017ad48cf5eSKarsten Merker 1018fafef982SMarcin Niestroj ts->input_dev = devm_input_allocate_device(&ts->client->dev); 1019fafef982SMarcin Niestroj if (!ts->input_dev) { 1020fafef982SMarcin Niestroj dev_err(&ts->client->dev, "Failed to allocate input device."); 1021fafef982SMarcin Niestroj return -ENOMEM; 1022fafef982SMarcin Niestroj } 1023fafef982SMarcin Niestroj 1024fafef982SMarcin Niestroj ts->input_dev->name = "Goodix Capacitive TouchScreen"; 1025fafef982SMarcin Niestroj ts->input_dev->phys = "input/ts"; 1026fafef982SMarcin Niestroj ts->input_dev->id.bustype = BUS_I2C; 1027fafef982SMarcin Niestroj ts->input_dev->id.vendor = 0x0416; 1028fafef982SMarcin Niestroj ts->input_dev->id.product = ts->id; 1029fafef982SMarcin Niestroj ts->input_dev->id.version = ts->version; 1030fafef982SMarcin Niestroj 1031492ee52cSDmitry Mastykin ts->input_dev->keycode = ts->keymap; 1032492ee52cSDmitry Mastykin ts->input_dev->keycodesize = sizeof(ts->keymap[0]); 1033492ee52cSDmitry Mastykin ts->input_dev->keycodemax = GOODIX_MAX_KEYS; 1034492ee52cSDmitry Mastykin 1035fafef982SMarcin Niestroj /* Capacitive Windows/Home button on some devices */ 1036492ee52cSDmitry Mastykin for (i = 0; i < GOODIX_MAX_KEYS; ++i) { 1037492ee52cSDmitry Mastykin if (i == 0) 1038492ee52cSDmitry Mastykin ts->keymap[i] = KEY_LEFTMETA; 1039492ee52cSDmitry Mastykin else 1040492ee52cSDmitry Mastykin ts->keymap[i] = KEY_F1 + (i - 1); 1041492ee52cSDmitry Mastykin 1042492ee52cSDmitry Mastykin input_set_capability(ts->input_dev, EV_KEY, ts->keymap[i]); 1043492ee52cSDmitry Mastykin } 1044fafef982SMarcin Niestroj 1045fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X); 1046fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y); 1047fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 1048fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 1049fafef982SMarcin Niestroj 1050fafef982SMarcin Niestroj /* Read configuration and apply touchscreen parameters */ 105168caf858SIrina Tirdea goodix_read_config(ts); 105268caf858SIrina Tirdea 1053fafef982SMarcin Niestroj /* Try overriding touchscreen parameters via device properties */ 1054fafef982SMarcin Niestroj touchscreen_parse_properties(ts->input_dev, true, &ts->prop); 1055fafef982SMarcin Niestroj 1056fafef982SMarcin Niestroj if (!ts->prop.max_x || !ts->prop.max_y || !ts->max_touch_num) { 1057c1c00aa5SGuido Günther dev_err(&ts->client->dev, 1058c1c00aa5SGuido Günther "Invalid config (%d, %d, %d), using defaults\n", 1059c1c00aa5SGuido Günther ts->prop.max_x, ts->prop.max_y, ts->max_touch_num); 1060fafef982SMarcin Niestroj ts->prop.max_x = GOODIX_MAX_WIDTH - 1; 1061fafef982SMarcin Niestroj ts->prop.max_y = GOODIX_MAX_HEIGHT - 1; 1062fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 1063fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 1064fafef982SMarcin Niestroj ABS_MT_POSITION_X, ts->prop.max_x); 1065fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 1066fafef982SMarcin Niestroj ABS_MT_POSITION_Y, ts->prop.max_y); 1067fafef982SMarcin Niestroj } 1068fafef982SMarcin Niestroj 1069fafef982SMarcin Niestroj if (dmi_check_system(rotated_screen)) { 1070fafef982SMarcin Niestroj ts->prop.invert_x = true; 1071fafef982SMarcin Niestroj ts->prop.invert_y = true; 1072fafef982SMarcin Niestroj dev_dbg(&ts->client->dev, 1073fafef982SMarcin Niestroj "Applying '180 degrees rotated screen' quirk\n"); 1074fafef982SMarcin Niestroj } 1075fafef982SMarcin Niestroj 1076bd3b8480SYauhen Kharuzhy if (dmi_check_system(nine_bytes_report)) { 1077bd3b8480SYauhen Kharuzhy ts->contact_size = 9; 1078bd3b8480SYauhen Kharuzhy 1079bd3b8480SYauhen Kharuzhy dev_dbg(&ts->client->dev, 1080bd3b8480SYauhen Kharuzhy "Non-standard 9-bytes report format quirk\n"); 1081bd3b8480SYauhen Kharuzhy } 1082bd3b8480SYauhen Kharuzhy 10831dd5ddc1SSergei A. Trusov if (dmi_check_system(inverted_x_screen)) { 10841dd5ddc1SSergei A. Trusov ts->prop.invert_x = true; 10851dd5ddc1SSergei A. Trusov dev_dbg(&ts->client->dev, 10861dd5ddc1SSergei A. Trusov "Applying 'inverted x screen' quirk\n"); 10871dd5ddc1SSergei A. Trusov } 10881dd5ddc1SSergei A. Trusov 1089fafef982SMarcin Niestroj error = input_mt_init_slots(ts->input_dev, ts->max_touch_num, 1090fafef982SMarcin Niestroj INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); 1091fafef982SMarcin Niestroj if (error) { 1092fafef982SMarcin Niestroj dev_err(&ts->client->dev, 1093fafef982SMarcin Niestroj "Failed to initialize MT slots: %d", error); 109468caf858SIrina Tirdea return error; 1095fafef982SMarcin Niestroj } 1096fafef982SMarcin Niestroj 1097fafef982SMarcin Niestroj error = input_register_device(ts->input_dev); 1098fafef982SMarcin Niestroj if (error) { 1099fafef982SMarcin Niestroj dev_err(&ts->client->dev, 1100fafef982SMarcin Niestroj "Failed to register input device: %d", error); 1101fafef982SMarcin Niestroj return error; 1102fafef982SMarcin Niestroj } 110368caf858SIrina Tirdea 11045ab09d6aSIrina Tirdea ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT; 11055ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 110668caf858SIrina Tirdea if (error) { 110768caf858SIrina Tirdea dev_err(&ts->client->dev, "request IRQ failed: %d\n", error); 110868caf858SIrina Tirdea return error; 110968caf858SIrina Tirdea } 111068caf858SIrina Tirdea 111168caf858SIrina Tirdea return 0; 111268caf858SIrina Tirdea } 111368caf858SIrina Tirdea 111468caf858SIrina Tirdea /** 111568caf858SIrina Tirdea * goodix_config_cb - Callback to finish device init 111668caf858SIrina Tirdea * 111768caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 111868caf858SIrina Tirdea * 111968caf858SIrina Tirdea * request_firmware_wait callback that finishes 112068caf858SIrina Tirdea * initialization of the device. 112168caf858SIrina Tirdea */ 112268caf858SIrina Tirdea static void goodix_config_cb(const struct firmware *cfg, void *ctx) 112368caf858SIrina Tirdea { 112468caf858SIrina Tirdea struct goodix_ts_data *ts = ctx; 112568caf858SIrina Tirdea int error; 112668caf858SIrina Tirdea 112768caf858SIrina Tirdea if (cfg) { 112868caf858SIrina Tirdea /* send device configuration to the firmware */ 11291a67448fSHans de Goede error = goodix_send_cfg(ts, cfg->data, cfg->size); 113068caf858SIrina Tirdea if (error) 113168caf858SIrina Tirdea goto err_release_cfg; 113268caf858SIrina Tirdea } 113368caf858SIrina Tirdea 113468caf858SIrina Tirdea goodix_configure_dev(ts); 113568caf858SIrina Tirdea 113668caf858SIrina Tirdea err_release_cfg: 113768caf858SIrina Tirdea release_firmware(cfg); 113868caf858SIrina Tirdea complete_all(&ts->firmware_loading_complete); 113968caf858SIrina Tirdea } 114068caf858SIrina Tirdea 1141ae97fb58SJagan Teki static void goodix_disable_regulators(void *arg) 1142ae97fb58SJagan Teki { 1143ae97fb58SJagan Teki struct goodix_ts_data *ts = arg; 1144ae97fb58SJagan Teki 1145ae97fb58SJagan Teki regulator_disable(ts->vddio); 1146ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1147ae97fb58SJagan Teki } 1148ae97fb58SJagan Teki 1149ca96ea86SBastien Nocera static int goodix_ts_probe(struct i2c_client *client, 1150ca96ea86SBastien Nocera const struct i2c_device_id *id) 1151ca96ea86SBastien Nocera { 1152ca96ea86SBastien Nocera struct goodix_ts_data *ts; 1153ca96ea86SBastien Nocera int error; 1154ca96ea86SBastien Nocera 1155ca96ea86SBastien Nocera dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr); 1156ca96ea86SBastien Nocera 1157ca96ea86SBastien Nocera if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 1158ca96ea86SBastien Nocera dev_err(&client->dev, "I2C check functionality failed.\n"); 1159ca96ea86SBastien Nocera return -ENXIO; 1160ca96ea86SBastien Nocera } 1161ca96ea86SBastien Nocera 1162ca96ea86SBastien Nocera ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); 1163ca96ea86SBastien Nocera if (!ts) 1164ca96ea86SBastien Nocera return -ENOMEM; 1165ca96ea86SBastien Nocera 1166ca96ea86SBastien Nocera ts->client = client; 1167ca96ea86SBastien Nocera i2c_set_clientdata(client, ts); 116868caf858SIrina Tirdea init_completion(&ts->firmware_loading_complete); 1169bd3b8480SYauhen Kharuzhy ts->contact_size = GOODIX_CONTACT_SIZE; 1170ca96ea86SBastien Nocera 1171ec6e1b40SIrina Tirdea error = goodix_get_gpio_config(ts); 1172ec6e1b40SIrina Tirdea if (error) 1173ec6e1b40SIrina Tirdea return error; 1174ec6e1b40SIrina Tirdea 1175ae97fb58SJagan Teki /* power up the controller */ 1176ae97fb58SJagan Teki error = regulator_enable(ts->avdd28); 1177ae97fb58SJagan Teki if (error) { 1178ae97fb58SJagan Teki dev_err(&client->dev, 1179ae97fb58SJagan Teki "Failed to enable AVDD28 regulator: %d\n", 1180ae97fb58SJagan Teki error); 1181ae97fb58SJagan Teki return error; 1182ae97fb58SJagan Teki } 1183ae97fb58SJagan Teki 1184ae97fb58SJagan Teki error = regulator_enable(ts->vddio); 1185ae97fb58SJagan Teki if (error) { 1186ae97fb58SJagan Teki dev_err(&client->dev, 1187ae97fb58SJagan Teki "Failed to enable VDDIO regulator: %d\n", 1188ae97fb58SJagan Teki error); 1189ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1190ae97fb58SJagan Teki return error; 1191ae97fb58SJagan Teki } 1192ae97fb58SJagan Teki 1193ae97fb58SJagan Teki error = devm_add_action_or_reset(&client->dev, 1194ae97fb58SJagan Teki goodix_disable_regulators, ts); 1195ae97fb58SJagan Teki if (error) 1196ae97fb58SJagan Teki return error; 1197ae97fb58SJagan Teki 11989e1f2d70SHans de Goede reset: 11991921daceSHans de Goede if (ts->reset_controller_at_probe) { 1200ec6e1b40SIrina Tirdea /* reset the controller */ 1201ec6e1b40SIrina Tirdea error = goodix_reset(ts); 1202ec6e1b40SIrina Tirdea if (error) { 1203ec6e1b40SIrina Tirdea dev_err(&client->dev, "Controller reset failed.\n"); 1204ec6e1b40SIrina Tirdea return error; 1205ec6e1b40SIrina Tirdea } 1206ec6e1b40SIrina Tirdea } 1207ec6e1b40SIrina Tirdea 1208ca96ea86SBastien Nocera error = goodix_i2c_test(client); 1209ca96ea86SBastien Nocera if (error) { 12109e1f2d70SHans de Goede if (!ts->reset_controller_at_probe && 12119e1f2d70SHans de Goede ts->irq_pin_access_method != IRQ_PIN_ACCESS_NONE) { 12129e1f2d70SHans de Goede /* Retry after a controller reset */ 12139e1f2d70SHans de Goede ts->reset_controller_at_probe = true; 12149e1f2d70SHans de Goede goto reset; 12159e1f2d70SHans de Goede } 1216ca96ea86SBastien Nocera dev_err(&client->dev, "I2C communication failure: %d\n", error); 1217ca96ea86SBastien Nocera return error; 1218ca96ea86SBastien Nocera } 1219ca96ea86SBastien Nocera 122068caf858SIrina Tirdea error = goodix_read_version(ts); 1221ca96ea86SBastien Nocera if (error) { 1222ca96ea86SBastien Nocera dev_err(&client->dev, "Read version failed.\n"); 1223ca96ea86SBastien Nocera return error; 1224ca96ea86SBastien Nocera } 1225ca96ea86SBastien Nocera 122625309004SMarcin Niestroj ts->chip = goodix_get_chip_data(ts->id); 1227a779fbc6SIrina Tirdea 1228e070a97bSHans de Goede if (ts->load_cfg_from_disk) { 122968caf858SIrina Tirdea /* update device config */ 123068caf858SIrina Tirdea ts->cfg_name = devm_kasprintf(&client->dev, GFP_KERNEL, 123168caf858SIrina Tirdea "goodix_%d_cfg.bin", ts->id); 123268caf858SIrina Tirdea if (!ts->cfg_name) 123368caf858SIrina Tirdea return -ENOMEM; 1234ca96ea86SBastien Nocera 123568caf858SIrina Tirdea error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name, 123668caf858SIrina Tirdea &client->dev, GFP_KERNEL, ts, 123768caf858SIrina Tirdea goodix_config_cb); 1238ca96ea86SBastien Nocera if (error) { 123968caf858SIrina Tirdea dev_err(&client->dev, 124068caf858SIrina Tirdea "Failed to invoke firmware loader: %d\n", 124168caf858SIrina Tirdea error); 1242ca96ea86SBastien Nocera return error; 1243ca96ea86SBastien Nocera } 1244ca96ea86SBastien Nocera 1245ca96ea86SBastien Nocera return 0; 124668caf858SIrina Tirdea } else { 124768caf858SIrina Tirdea error = goodix_configure_dev(ts); 124868caf858SIrina Tirdea if (error) 124968caf858SIrina Tirdea return error; 125068caf858SIrina Tirdea } 125168caf858SIrina Tirdea 125268caf858SIrina Tirdea return 0; 125368caf858SIrina Tirdea } 125468caf858SIrina Tirdea 125568caf858SIrina Tirdea static int goodix_ts_remove(struct i2c_client *client) 125668caf858SIrina Tirdea { 125768caf858SIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 125868caf858SIrina Tirdea 1259e070a97bSHans de Goede if (ts->load_cfg_from_disk) 126068caf858SIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 126168caf858SIrina Tirdea 126268caf858SIrina Tirdea return 0; 1263ca96ea86SBastien Nocera } 1264ca96ea86SBastien Nocera 12655ab09d6aSIrina Tirdea static int __maybe_unused goodix_suspend(struct device *dev) 12665ab09d6aSIrina Tirdea { 12675ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 12685ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 12695ab09d6aSIrina Tirdea int error; 12705ab09d6aSIrina Tirdea 1271e070a97bSHans de Goede if (ts->load_cfg_from_disk) 1272e070a97bSHans de Goede wait_for_completion(&ts->firmware_loading_complete); 1273e070a97bSHans de Goede 12745ab09d6aSIrina Tirdea /* We need gpio pins to suspend/resume */ 127549db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1276faec44b6SHans de Goede disable_irq(client->irq); 12775ab09d6aSIrina Tirdea return 0; 1278faec44b6SHans de Goede } 12795ab09d6aSIrina Tirdea 12805ab09d6aSIrina Tirdea /* Free IRQ as IRQ pin is used as output in the suspend sequence */ 12815ab09d6aSIrina Tirdea goodix_free_irq(ts); 12825ab09d6aSIrina Tirdea 12835ab09d6aSIrina Tirdea /* Output LOW on the INT pin for 5 ms */ 128449db3997SHans de Goede error = goodix_irq_direction_output(ts, 0); 12855ab09d6aSIrina Tirdea if (error) { 12865ab09d6aSIrina Tirdea goodix_request_irq(ts); 12875ab09d6aSIrina Tirdea return error; 12885ab09d6aSIrina Tirdea } 12895ab09d6aSIrina Tirdea 12905ab09d6aSIrina Tirdea usleep_range(5000, 6000); 12915ab09d6aSIrina Tirdea 12925ab09d6aSIrina Tirdea error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND, 12935ab09d6aSIrina Tirdea GOODIX_CMD_SCREEN_OFF); 12945ab09d6aSIrina Tirdea if (error) { 12955ab09d6aSIrina Tirdea dev_err(&ts->client->dev, "Screen off command failed\n"); 129649db3997SHans de Goede goodix_irq_direction_input(ts); 12975ab09d6aSIrina Tirdea goodix_request_irq(ts); 12985ab09d6aSIrina Tirdea return -EAGAIN; 12995ab09d6aSIrina Tirdea } 13005ab09d6aSIrina Tirdea 13015ab09d6aSIrina Tirdea /* 13025ab09d6aSIrina Tirdea * The datasheet specifies that the interval between sending screen-off 13035ab09d6aSIrina Tirdea * command and wake-up should be longer than 58 ms. To avoid waking up 13045ab09d6aSIrina Tirdea * sooner, delay 58ms here. 13055ab09d6aSIrina Tirdea */ 13065ab09d6aSIrina Tirdea msleep(58); 13075ab09d6aSIrina Tirdea return 0; 13085ab09d6aSIrina Tirdea } 13095ab09d6aSIrina Tirdea 13105ab09d6aSIrina Tirdea static int __maybe_unused goodix_resume(struct device *dev) 13115ab09d6aSIrina Tirdea { 13125ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 13135ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 1314273ec6bdSHans de Goede u8 config_ver; 13155ab09d6aSIrina Tirdea int error; 13165ab09d6aSIrina Tirdea 131749db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1318faec44b6SHans de Goede enable_irq(client->irq); 13195ab09d6aSIrina Tirdea return 0; 1320faec44b6SHans de Goede } 13215ab09d6aSIrina Tirdea 13225ab09d6aSIrina Tirdea /* 13235ab09d6aSIrina Tirdea * Exit sleep mode by outputting HIGH level to INT pin 13245ab09d6aSIrina Tirdea * for 2ms~5ms. 13255ab09d6aSIrina Tirdea */ 132649db3997SHans de Goede error = goodix_irq_direction_output(ts, 1); 13275ab09d6aSIrina Tirdea if (error) 13285ab09d6aSIrina Tirdea return error; 13295ab09d6aSIrina Tirdea 13305ab09d6aSIrina Tirdea usleep_range(2000, 5000); 13315ab09d6aSIrina Tirdea 13325ab09d6aSIrina Tirdea error = goodix_int_sync(ts); 13335ab09d6aSIrina Tirdea if (error) 13345ab09d6aSIrina Tirdea return error; 13355ab09d6aSIrina Tirdea 1336273ec6bdSHans de Goede error = goodix_i2c_read(ts->client, ts->chip->config_addr, 1337273ec6bdSHans de Goede &config_ver, 1); 1338273ec6bdSHans de Goede if (error) 1339273ec6bdSHans de Goede dev_warn(dev, "Error reading config version: %d, resetting controller\n", 1340273ec6bdSHans de Goede error); 1341273ec6bdSHans de Goede else if (config_ver != ts->config[0]) 1342273ec6bdSHans de Goede dev_info(dev, "Config version mismatch %d != %d, resetting controller\n", 1343273ec6bdSHans de Goede config_ver, ts->config[0]); 1344273ec6bdSHans de Goede 1345273ec6bdSHans de Goede if (error != 0 || config_ver != ts->config[0]) { 1346273ec6bdSHans de Goede error = goodix_reset(ts); 1347273ec6bdSHans de Goede if (error) { 1348273ec6bdSHans de Goede dev_err(dev, "Controller reset failed.\n"); 1349273ec6bdSHans de Goede return error; 1350273ec6bdSHans de Goede } 1351273ec6bdSHans de Goede 1352273ec6bdSHans de Goede error = goodix_send_cfg(ts, ts->config, ts->chip->config_len); 1353273ec6bdSHans de Goede if (error) 1354273ec6bdSHans de Goede return error; 1355273ec6bdSHans de Goede } 1356273ec6bdSHans de Goede 13575ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 13585ab09d6aSIrina Tirdea if (error) 13595ab09d6aSIrina Tirdea return error; 13605ab09d6aSIrina Tirdea 13615ab09d6aSIrina Tirdea return 0; 13625ab09d6aSIrina Tirdea } 13635ab09d6aSIrina Tirdea 13645ab09d6aSIrina Tirdea static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume); 13655ab09d6aSIrina Tirdea 1366ca96ea86SBastien Nocera static const struct i2c_device_id goodix_ts_id[] = { 1367ca96ea86SBastien Nocera { "GDIX1001:00", 0 }, 1368ca96ea86SBastien Nocera { } 1369ca96ea86SBastien Nocera }; 13702e9e910eSJavier Martinez Canillas MODULE_DEVICE_TABLE(i2c, goodix_ts_id); 1371ca96ea86SBastien Nocera 1372771d8f1bSAleksei Mamlin #ifdef CONFIG_ACPI 1373ca96ea86SBastien Nocera static const struct acpi_device_id goodix_acpi_match[] = { 1374ca96ea86SBastien Nocera { "GDIX1001", 0 }, 13755ca4d1aeSEthan Lee { "GDIX1002", 0 }, 1376ca96ea86SBastien Nocera { } 1377ca96ea86SBastien Nocera }; 1378ca96ea86SBastien Nocera MODULE_DEVICE_TABLE(acpi, goodix_acpi_match); 1379771d8f1bSAleksei Mamlin #endif 1380771d8f1bSAleksei Mamlin 1381771d8f1bSAleksei Mamlin #ifdef CONFIG_OF 1382771d8f1bSAleksei Mamlin static const struct of_device_id goodix_of_match[] = { 138325309004SMarcin Niestroj { .compatible = "goodix,gt1151" }, 1384a5f50c50SJagan Teki { .compatible = "goodix,gt5663" }, 138584ef1b33SGuido Günther { .compatible = "goodix,gt5688" }, 1386771d8f1bSAleksei Mamlin { .compatible = "goodix,gt911" }, 1387771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9110" }, 1388771d8f1bSAleksei Mamlin { .compatible = "goodix,gt912" }, 1389771d8f1bSAleksei Mamlin { .compatible = "goodix,gt927" }, 1390771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9271" }, 1391771d8f1bSAleksei Mamlin { .compatible = "goodix,gt928" }, 1392771d8f1bSAleksei Mamlin { .compatible = "goodix,gt967" }, 1393771d8f1bSAleksei Mamlin { } 1394771d8f1bSAleksei Mamlin }; 1395771d8f1bSAleksei Mamlin MODULE_DEVICE_TABLE(of, goodix_of_match); 1396771d8f1bSAleksei Mamlin #endif 1397ca96ea86SBastien Nocera 1398ca96ea86SBastien Nocera static struct i2c_driver goodix_ts_driver = { 1399ca96ea86SBastien Nocera .probe = goodix_ts_probe, 140068caf858SIrina Tirdea .remove = goodix_ts_remove, 1401ca96ea86SBastien Nocera .id_table = goodix_ts_id, 1402ca96ea86SBastien Nocera .driver = { 1403ca96ea86SBastien Nocera .name = "Goodix-TS", 1404771d8f1bSAleksei Mamlin .acpi_match_table = ACPI_PTR(goodix_acpi_match), 1405771d8f1bSAleksei Mamlin .of_match_table = of_match_ptr(goodix_of_match), 14065ab09d6aSIrina Tirdea .pm = &goodix_pm_ops, 1407ca96ea86SBastien Nocera }, 1408ca96ea86SBastien Nocera }; 1409ca96ea86SBastien Nocera module_i2c_driver(goodix_ts_driver); 1410ca96ea86SBastien Nocera 1411ca96ea86SBastien Nocera MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); 1412ca96ea86SBastien Nocera MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>"); 1413ca96ea86SBastien Nocera MODULE_DESCRIPTION("Goodix touchscreen driver"); 1414ca96ea86SBastien Nocera MODULE_LICENSE("GPL v2"); 1415