1b886d83cSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2ca96ea86SBastien Nocera /* 3ca96ea86SBastien Nocera * Driver for Goodix Touchscreens 4ca96ea86SBastien Nocera * 5ca96ea86SBastien Nocera * Copyright (c) 2014 Red Hat Inc. 6ad48cf5eSKarsten Merker * Copyright (c) 2015 K. Merker <merker@debian.org> 7ca96ea86SBastien Nocera * 8ca96ea86SBastien Nocera * This code is based on gt9xx.c authored by andrew@goodix.com: 9ca96ea86SBastien Nocera * 10ca96ea86SBastien Nocera * 2010 - 2012 Goodix Technology. 11ca96ea86SBastien Nocera */ 12ca96ea86SBastien Nocera 13ca96ea86SBastien Nocera 14ca96ea86SBastien Nocera #include <linux/kernel.h> 158b5a359cSBastien Nocera #include <linux/dmi.h> 1668caf858SIrina Tirdea #include <linux/firmware.h> 17ec6e1b40SIrina Tirdea #include <linux/gpio/consumer.h> 18ca96ea86SBastien Nocera #include <linux/i2c.h> 19ca96ea86SBastien Nocera #include <linux/input.h> 20ca96ea86SBastien Nocera #include <linux/input/mt.h> 21fafef982SMarcin Niestroj #include <linux/input/touchscreen.h> 22ca96ea86SBastien Nocera #include <linux/module.h> 23ca96ea86SBastien Nocera #include <linux/delay.h> 24ca96ea86SBastien Nocera #include <linux/irq.h> 25ca96ea86SBastien Nocera #include <linux/interrupt.h> 26ae97fb58SJagan Teki #include <linux/regulator/consumer.h> 27ca96ea86SBastien Nocera #include <linux/slab.h> 28771d8f1bSAleksei Mamlin #include <linux/acpi.h> 29771d8f1bSAleksei Mamlin #include <linux/of.h> 30ca96ea86SBastien Nocera #include <asm/unaligned.h> 31ca96ea86SBastien Nocera 32aebfc52cSHans de Goede #define GOODIX_GPIO_INT_NAME "irq" 33aebfc52cSHans de Goede #define GOODIX_GPIO_RST_NAME "reset" 34aebfc52cSHans de Goede 35aebfc52cSHans de Goede #define GOODIX_MAX_HEIGHT 4096 36aebfc52cSHans de Goede #define GOODIX_MAX_WIDTH 4096 37aebfc52cSHans de Goede #define GOODIX_INT_TRIGGER 1 38aebfc52cSHans de Goede #define GOODIX_CONTACT_SIZE 8 39aebfc52cSHans de Goede #define GOODIX_MAX_CONTACT_SIZE 9 40aebfc52cSHans de Goede #define GOODIX_MAX_CONTACTS 10 41aebfc52cSHans de Goede 42686e8a24SHans de Goede #define GOODIX_CONFIG_MIN_LENGTH 186 43aebfc52cSHans de Goede #define GOODIX_CONFIG_911_LENGTH 186 44aebfc52cSHans de Goede #define GOODIX_CONFIG_967_LENGTH 228 45686e8a24SHans de Goede #define GOODIX_CONFIG_GT9X_LENGTH 240 46686e8a24SHans de Goede #define GOODIX_CONFIG_MAX_LENGTH 240 47aebfc52cSHans de Goede 48aebfc52cSHans de Goede /* Register defines */ 49aebfc52cSHans de Goede #define GOODIX_REG_COMMAND 0x8040 50aebfc52cSHans de Goede #define GOODIX_CMD_SCREEN_OFF 0x05 51aebfc52cSHans de Goede 52aebfc52cSHans de Goede #define GOODIX_READ_COOR_ADDR 0x814E 53aebfc52cSHans de Goede #define GOODIX_GT1X_REG_CONFIG_DATA 0x8050 54aebfc52cSHans de Goede #define GOODIX_GT9X_REG_CONFIG_DATA 0x8047 55aebfc52cSHans de Goede #define GOODIX_REG_ID 0x8140 56aebfc52cSHans de Goede 57aebfc52cSHans de Goede #define GOODIX_BUFFER_STATUS_READY BIT(7) 58aebfc52cSHans de Goede #define GOODIX_BUFFER_STATUS_TIMEOUT 20 59aebfc52cSHans de Goede 60aebfc52cSHans de Goede #define RESOLUTION_LOC 1 61aebfc52cSHans de Goede #define MAX_CONTACTS_LOC 5 62aebfc52cSHans de Goede #define TRIGGER_LOC 6 63aebfc52cSHans de Goede 6425309004SMarcin Niestroj struct goodix_ts_data; 6525309004SMarcin Niestroj 6649db3997SHans de Goede enum goodix_irq_pin_access_method { 6749db3997SHans de Goede IRQ_PIN_ACCESS_NONE, 6849db3997SHans de Goede IRQ_PIN_ACCESS_GPIO, 69a7d4b171SHans de Goede IRQ_PIN_ACCESS_ACPI_GPIO, 70c5fca485SHans de Goede IRQ_PIN_ACCESS_ACPI_METHOD, 7149db3997SHans de Goede }; 7249db3997SHans de Goede 7325309004SMarcin Niestroj struct goodix_chip_data { 7425309004SMarcin Niestroj u16 config_addr; 7525309004SMarcin Niestroj int config_len; 761a67448fSHans de Goede int (*check_config)(struct goodix_ts_data *ts, const u8 *cfg, int len); 77de956caeSHans de Goede void (*calc_config_checksum)(struct goodix_ts_data *ts); 7825309004SMarcin Niestroj }; 7925309004SMarcin Niestroj 80ca96ea86SBastien Nocera struct goodix_ts_data { 81ca96ea86SBastien Nocera struct i2c_client *client; 82ca96ea86SBastien Nocera struct input_dev *input_dev; 8325309004SMarcin Niestroj const struct goodix_chip_data *chip; 84fafef982SMarcin Niestroj struct touchscreen_properties prop; 85ca96ea86SBastien Nocera unsigned int max_touch_num; 86ca96ea86SBastien Nocera unsigned int int_trigger_type; 87ae97fb58SJagan Teki struct regulator *avdd28; 88ae97fb58SJagan Teki struct regulator *vddio; 89ec6e1b40SIrina Tirdea struct gpio_desc *gpiod_int; 90ec6e1b40SIrina Tirdea struct gpio_desc *gpiod_rst; 91a7d4b171SHans de Goede int gpio_count; 92a7d4b171SHans de Goede int gpio_int_idx; 9368caf858SIrina Tirdea u16 id; 9468caf858SIrina Tirdea u16 version; 9568caf858SIrina Tirdea const char *cfg_name; 961921daceSHans de Goede bool reset_controller_at_probe; 97e070a97bSHans de Goede bool load_cfg_from_disk; 9868caf858SIrina Tirdea struct completion firmware_loading_complete; 995ab09d6aSIrina Tirdea unsigned long irq_flags; 10049db3997SHans de Goede enum goodix_irq_pin_access_method irq_pin_access_method; 101bd3b8480SYauhen Kharuzhy unsigned int contact_size; 102de956caeSHans de Goede u8 config[GOODIX_CONFIG_MAX_LENGTH]; 103ca96ea86SBastien Nocera }; 104ca96ea86SBastien Nocera 10525309004SMarcin Niestroj static int goodix_check_cfg_8(struct goodix_ts_data *ts, 1061a67448fSHans de Goede const u8 *cfg, int len); 10725309004SMarcin Niestroj static int goodix_check_cfg_16(struct goodix_ts_data *ts, 1081a67448fSHans de Goede const u8 *cfg, int len); 109de956caeSHans de Goede static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts); 110de956caeSHans de Goede static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts); 11125309004SMarcin Niestroj 11225309004SMarcin Niestroj static const struct goodix_chip_data gt1x_chip_data = { 11325309004SMarcin Niestroj .config_addr = GOODIX_GT1X_REG_CONFIG_DATA, 114686e8a24SHans de Goede .config_len = GOODIX_CONFIG_GT9X_LENGTH, 11525309004SMarcin Niestroj .check_config = goodix_check_cfg_16, 116de956caeSHans de Goede .calc_config_checksum = goodix_calc_cfg_checksum_16, 11725309004SMarcin Niestroj }; 11825309004SMarcin Niestroj 11925309004SMarcin Niestroj static const struct goodix_chip_data gt911_chip_data = { 12025309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 12125309004SMarcin Niestroj .config_len = GOODIX_CONFIG_911_LENGTH, 12225309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 123de956caeSHans de Goede .calc_config_checksum = goodix_calc_cfg_checksum_8, 12425309004SMarcin Niestroj }; 12525309004SMarcin Niestroj 12625309004SMarcin Niestroj static const struct goodix_chip_data gt967_chip_data = { 12725309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 12825309004SMarcin Niestroj .config_len = GOODIX_CONFIG_967_LENGTH, 12925309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 130de956caeSHans de Goede .calc_config_checksum = goodix_calc_cfg_checksum_8, 13125309004SMarcin Niestroj }; 13225309004SMarcin Niestroj 13325309004SMarcin Niestroj static const struct goodix_chip_data gt9x_chip_data = { 13425309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 135686e8a24SHans de Goede .config_len = GOODIX_CONFIG_GT9X_LENGTH, 13625309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 137de956caeSHans de Goede .calc_config_checksum = goodix_calc_cfg_checksum_8, 13825309004SMarcin Niestroj }; 13925309004SMarcin Niestroj 140ca96ea86SBastien Nocera static const unsigned long goodix_irq_flags[] = { 141ca96ea86SBastien Nocera IRQ_TYPE_EDGE_RISING, 142ca96ea86SBastien Nocera IRQ_TYPE_EDGE_FALLING, 143ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_LOW, 144ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_HIGH, 145ca96ea86SBastien Nocera }; 146ca96ea86SBastien Nocera 1478b5a359cSBastien Nocera /* 1488b5a359cSBastien Nocera * Those tablets have their coordinates origin at the bottom right 1498b5a359cSBastien Nocera * of the tablet, as if rotated 180 degrees 1508b5a359cSBastien Nocera */ 1518b5a359cSBastien Nocera static const struct dmi_system_id rotated_screen[] = { 1528b5a359cSBastien Nocera #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1538b5a359cSBastien Nocera { 154df5b5e55SHans de Goede .ident = "Teclast X89", 155df5b5e55SHans de Goede .matches = { 156df5b5e55SHans de Goede /* tPAD is too generic, also match on bios date */ 157df5b5e55SHans de Goede DMI_MATCH(DMI_BOARD_VENDOR, "TECLAST"), 158df5b5e55SHans de Goede DMI_MATCH(DMI_BOARD_NAME, "tPAD"), 159df5b5e55SHans de Goede DMI_MATCH(DMI_BIOS_DATE, "12/19/2014"), 160df5b5e55SHans de Goede }, 161df5b5e55SHans de Goede }, 162df5b5e55SHans de Goede { 1638b5a359cSBastien Nocera .ident = "WinBook TW100", 1648b5a359cSBastien Nocera .matches = { 1658b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 1668b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW100") 1678b5a359cSBastien Nocera } 1688b5a359cSBastien Nocera }, 1698b5a359cSBastien Nocera { 1708b5a359cSBastien Nocera .ident = "WinBook TW700", 1718b5a359cSBastien Nocera .matches = { 1728b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 1738b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW700") 1748b5a359cSBastien Nocera }, 1758b5a359cSBastien Nocera }, 1768b5a359cSBastien Nocera #endif 1778b5a359cSBastien Nocera {} 1788b5a359cSBastien Nocera }; 1798b5a359cSBastien Nocera 180bd3b8480SYauhen Kharuzhy static const struct dmi_system_id nine_bytes_report[] = { 181bd3b8480SYauhen Kharuzhy #if defined(CONFIG_DMI) && defined(CONFIG_X86) 182bd3b8480SYauhen Kharuzhy { 183bd3b8480SYauhen Kharuzhy .ident = "Lenovo YogaBook", 184bd3b8480SYauhen Kharuzhy /* YB1-X91L/F and YB1-X90L/F */ 185bd3b8480SYauhen Kharuzhy .matches = { 186bd3b8480SYauhen Kharuzhy DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X9") 187bd3b8480SYauhen Kharuzhy } 188bd3b8480SYauhen Kharuzhy }, 189bd3b8480SYauhen Kharuzhy #endif 190bd3b8480SYauhen Kharuzhy {} 191bd3b8480SYauhen Kharuzhy }; 192bd3b8480SYauhen Kharuzhy 1931dd5ddc1SSergei A. Trusov /* 1941dd5ddc1SSergei A. Trusov * Those tablets have their x coordinate inverted 1951dd5ddc1SSergei A. Trusov */ 1961dd5ddc1SSergei A. Trusov static const struct dmi_system_id inverted_x_screen[] = { 1971dd5ddc1SSergei A. Trusov #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1981dd5ddc1SSergei A. Trusov { 1991dd5ddc1SSergei A. Trusov .ident = "Cube I15-TC", 2001dd5ddc1SSergei A. Trusov .matches = { 2011dd5ddc1SSergei A. Trusov DMI_MATCH(DMI_SYS_VENDOR, "Cube"), 2021dd5ddc1SSergei A. Trusov DMI_MATCH(DMI_PRODUCT_NAME, "I15-TC") 2031dd5ddc1SSergei A. Trusov }, 2041dd5ddc1SSergei A. Trusov }, 2051dd5ddc1SSergei A. Trusov #endif 2061dd5ddc1SSergei A. Trusov {} 2071dd5ddc1SSergei A. Trusov }; 2081dd5ddc1SSergei A. Trusov 209ca96ea86SBastien Nocera /** 210ca96ea86SBastien Nocera * goodix_i2c_read - read data from a register of the i2c slave device. 211ca96ea86SBastien Nocera * 212ca96ea86SBastien Nocera * @client: i2c device. 213ca96ea86SBastien Nocera * @reg: the register to read from. 214ca96ea86SBastien Nocera * @buf: raw write data buffer. 215ca96ea86SBastien Nocera * @len: length of the buffer to write 216ca96ea86SBastien Nocera */ 217ca96ea86SBastien Nocera static int goodix_i2c_read(struct i2c_client *client, 218ca96ea86SBastien Nocera u16 reg, u8 *buf, int len) 219ca96ea86SBastien Nocera { 220ca96ea86SBastien Nocera struct i2c_msg msgs[2]; 221fafef982SMarcin Niestroj __be16 wbuf = cpu_to_be16(reg); 222ca96ea86SBastien Nocera int ret; 223ca96ea86SBastien Nocera 224ca96ea86SBastien Nocera msgs[0].flags = 0; 225ca96ea86SBastien Nocera msgs[0].addr = client->addr; 226ca96ea86SBastien Nocera msgs[0].len = 2; 227ca96ea86SBastien Nocera msgs[0].buf = (u8 *)&wbuf; 228ca96ea86SBastien Nocera 229ca96ea86SBastien Nocera msgs[1].flags = I2C_M_RD; 230ca96ea86SBastien Nocera msgs[1].addr = client->addr; 231ca96ea86SBastien Nocera msgs[1].len = len; 232ca96ea86SBastien Nocera msgs[1].buf = buf; 233ca96ea86SBastien Nocera 234ca96ea86SBastien Nocera ret = i2c_transfer(client->adapter, msgs, 2); 235ca96ea86SBastien Nocera return ret < 0 ? ret : (ret != ARRAY_SIZE(msgs) ? -EIO : 0); 236ca96ea86SBastien Nocera } 237ca96ea86SBastien Nocera 23868caf858SIrina Tirdea /** 23968caf858SIrina Tirdea * goodix_i2c_write - write data to a register of the i2c slave device. 24068caf858SIrina Tirdea * 24168caf858SIrina Tirdea * @client: i2c device. 24268caf858SIrina Tirdea * @reg: the register to write to. 24368caf858SIrina Tirdea * @buf: raw data buffer to write. 24468caf858SIrina Tirdea * @len: length of the buffer to write 24568caf858SIrina Tirdea */ 24668caf858SIrina Tirdea static int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf, 24768caf858SIrina Tirdea unsigned len) 24868caf858SIrina Tirdea { 24968caf858SIrina Tirdea u8 *addr_buf; 25068caf858SIrina Tirdea struct i2c_msg msg; 25168caf858SIrina Tirdea int ret; 25268caf858SIrina Tirdea 25368caf858SIrina Tirdea addr_buf = kmalloc(len + 2, GFP_KERNEL); 25468caf858SIrina Tirdea if (!addr_buf) 25568caf858SIrina Tirdea return -ENOMEM; 25668caf858SIrina Tirdea 25768caf858SIrina Tirdea addr_buf[0] = reg >> 8; 25868caf858SIrina Tirdea addr_buf[1] = reg & 0xFF; 25968caf858SIrina Tirdea memcpy(&addr_buf[2], buf, len); 26068caf858SIrina Tirdea 26168caf858SIrina Tirdea msg.flags = 0; 26268caf858SIrina Tirdea msg.addr = client->addr; 26368caf858SIrina Tirdea msg.buf = addr_buf; 26468caf858SIrina Tirdea msg.len = len + 2; 26568caf858SIrina Tirdea 26668caf858SIrina Tirdea ret = i2c_transfer(client->adapter, &msg, 1); 26768caf858SIrina Tirdea kfree(addr_buf); 26868caf858SIrina Tirdea return ret < 0 ? ret : (ret != 1 ? -EIO : 0); 26968caf858SIrina Tirdea } 27068caf858SIrina Tirdea 2715ab09d6aSIrina Tirdea static int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value) 2725ab09d6aSIrina Tirdea { 2735ab09d6aSIrina Tirdea return goodix_i2c_write(client, reg, &value, sizeof(value)); 2745ab09d6aSIrina Tirdea } 2755ab09d6aSIrina Tirdea 27625309004SMarcin Niestroj static const struct goodix_chip_data *goodix_get_chip_data(u16 id) 277a779fbc6SIrina Tirdea { 278a779fbc6SIrina Tirdea switch (id) { 27925309004SMarcin Niestroj case 1151: 280a5f50c50SJagan Teki case 5663: 28184ef1b33SGuido Günther case 5688: 28225309004SMarcin Niestroj return >1x_chip_data; 28325309004SMarcin Niestroj 284a779fbc6SIrina Tirdea case 911: 285a779fbc6SIrina Tirdea case 9271: 286a779fbc6SIrina Tirdea case 9110: 287a779fbc6SIrina Tirdea case 927: 288a779fbc6SIrina Tirdea case 928: 28925309004SMarcin Niestroj return >911_chip_data; 290a779fbc6SIrina Tirdea 291a779fbc6SIrina Tirdea case 912: 292a779fbc6SIrina Tirdea case 967: 29325309004SMarcin Niestroj return >967_chip_data; 294a779fbc6SIrina Tirdea 295a779fbc6SIrina Tirdea default: 29625309004SMarcin Niestroj return >9x_chip_data; 297a779fbc6SIrina Tirdea } 298a779fbc6SIrina Tirdea } 299a779fbc6SIrina Tirdea 300ca96ea86SBastien Nocera static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data) 301ca96ea86SBastien Nocera { 3029b5db7aaSPaul Cercueil unsigned long max_timeout; 303ca96ea86SBastien Nocera int touch_num; 304ca96ea86SBastien Nocera int error; 305ca96ea86SBastien Nocera 3069b5db7aaSPaul Cercueil /* 3079b5db7aaSPaul Cercueil * The 'buffer status' bit, which indicates that the data is valid, is 3089b5db7aaSPaul Cercueil * not set as soon as the interrupt is raised, but slightly after. 3099b5db7aaSPaul Cercueil * This takes around 10 ms to happen, so we poll for 20 ms. 3109b5db7aaSPaul Cercueil */ 3119b5db7aaSPaul Cercueil max_timeout = jiffies + msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT); 3129b5db7aaSPaul Cercueil do { 3139b5db7aaSPaul Cercueil error = goodix_i2c_read(ts->client, GOODIX_READ_COOR_ADDR, 314bd3b8480SYauhen Kharuzhy data, ts->contact_size + 1); 315ca96ea86SBastien Nocera if (error) { 3169b5db7aaSPaul Cercueil dev_err(&ts->client->dev, "I2C transfer error: %d\n", 3179b5db7aaSPaul Cercueil error); 318ca96ea86SBastien Nocera return error; 319ca96ea86SBastien Nocera } 320ca96ea86SBastien Nocera 3219b5db7aaSPaul Cercueil if (data[0] & GOODIX_BUFFER_STATUS_READY) { 322ca96ea86SBastien Nocera touch_num = data[0] & 0x0f; 323a7ac7c95SAleksei Mamlin if (touch_num > ts->max_touch_num) 324ca96ea86SBastien Nocera return -EPROTO; 325ca96ea86SBastien Nocera 326ca96ea86SBastien Nocera if (touch_num > 1) { 327bd3b8480SYauhen Kharuzhy data += 1 + ts->contact_size; 328ca96ea86SBastien Nocera error = goodix_i2c_read(ts->client, 329ca96ea86SBastien Nocera GOODIX_READ_COOR_ADDR + 330bd3b8480SYauhen Kharuzhy 1 + ts->contact_size, 331ca96ea86SBastien Nocera data, 332bd3b8480SYauhen Kharuzhy ts->contact_size * 3339b5db7aaSPaul Cercueil (touch_num - 1)); 334ca96ea86SBastien Nocera if (error) 335ca96ea86SBastien Nocera return error; 336ca96ea86SBastien Nocera } 337ca96ea86SBastien Nocera 338ca96ea86SBastien Nocera return touch_num; 339ca96ea86SBastien Nocera } 340ca96ea86SBastien Nocera 3419b5db7aaSPaul Cercueil usleep_range(1000, 2000); /* Poll every 1 - 2 ms */ 3429b5db7aaSPaul Cercueil } while (time_before(jiffies, max_timeout)); 3439b5db7aaSPaul Cercueil 3449b5db7aaSPaul Cercueil /* 3459b5db7aaSPaul Cercueil * The Goodix panel will send spurious interrupts after a 3469b5db7aaSPaul Cercueil * 'finger up' event, which will always cause a timeout. 3479b5db7aaSPaul Cercueil */ 34824ef83f6SDmitry Mastykin return -ENOMSG; 3499b5db7aaSPaul Cercueil } 3509b5db7aaSPaul Cercueil 351bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_8b(struct goodix_ts_data *ts, u8 *coor_data) 352ca96ea86SBastien Nocera { 353ca96ea86SBastien Nocera int id = coor_data[0] & 0x0F; 354ca96ea86SBastien Nocera int input_x = get_unaligned_le16(&coor_data[1]); 355ca96ea86SBastien Nocera int input_y = get_unaligned_le16(&coor_data[3]); 356ca96ea86SBastien Nocera int input_w = get_unaligned_le16(&coor_data[5]); 357ca96ea86SBastien Nocera 358ca96ea86SBastien Nocera input_mt_slot(ts->input_dev, id); 359ca96ea86SBastien Nocera input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 360fafef982SMarcin Niestroj touchscreen_report_pos(ts->input_dev, &ts->prop, 361fafef982SMarcin Niestroj input_x, input_y, true); 362ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 363ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 364ca96ea86SBastien Nocera } 365ca96ea86SBastien Nocera 366bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_9b(struct goodix_ts_data *ts, u8 *coor_data) 367bd3b8480SYauhen Kharuzhy { 368bd3b8480SYauhen Kharuzhy int id = coor_data[1] & 0x0F; 369bd3b8480SYauhen Kharuzhy int input_x = get_unaligned_le16(&coor_data[3]); 370bd3b8480SYauhen Kharuzhy int input_y = get_unaligned_le16(&coor_data[5]); 371bd3b8480SYauhen Kharuzhy int input_w = get_unaligned_le16(&coor_data[7]); 372bd3b8480SYauhen Kharuzhy 373bd3b8480SYauhen Kharuzhy input_mt_slot(ts->input_dev, id); 374bd3b8480SYauhen Kharuzhy input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 375bd3b8480SYauhen Kharuzhy touchscreen_report_pos(ts->input_dev, &ts->prop, 376bd3b8480SYauhen Kharuzhy input_x, input_y, true); 377bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 378bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 379bd3b8480SYauhen Kharuzhy } 380bd3b8480SYauhen Kharuzhy 381ca96ea86SBastien Nocera /** 382ca96ea86SBastien Nocera * goodix_process_events - Process incoming events 383ca96ea86SBastien Nocera * 384ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 385ca96ea86SBastien Nocera * 386ca96ea86SBastien Nocera * Called when the IRQ is triggered. Read the current device state, and push 387ca96ea86SBastien Nocera * the input events to the user space. 388ca96ea86SBastien Nocera */ 389ca96ea86SBastien Nocera static void goodix_process_events(struct goodix_ts_data *ts) 390ca96ea86SBastien Nocera { 391bd3b8480SYauhen Kharuzhy u8 point_data[1 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS]; 392ca96ea86SBastien Nocera int touch_num; 393ca96ea86SBastien Nocera int i; 394ca96ea86SBastien Nocera 395ca96ea86SBastien Nocera touch_num = goodix_ts_read_input_report(ts, point_data); 396ca96ea86SBastien Nocera if (touch_num < 0) 397ca96ea86SBastien Nocera return; 398ca96ea86SBastien Nocera 3994a54feeaSSergei A. Trusov /* 4004a54feeaSSergei A. Trusov * Bit 4 of the first byte reports the status of the capacitive 4014a54feeaSSergei A. Trusov * Windows/Home button. 4024a54feeaSSergei A. Trusov */ 4034a54feeaSSergei A. Trusov input_report_key(ts->input_dev, KEY_LEFTMETA, point_data[0] & BIT(4)); 4044a54feeaSSergei A. Trusov 405ca96ea86SBastien Nocera for (i = 0; i < touch_num; i++) 406bd3b8480SYauhen Kharuzhy if (ts->contact_size == 9) 407bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_9b(ts, 408bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 409bd3b8480SYauhen Kharuzhy else 410bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_8b(ts, 411bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 412ca96ea86SBastien Nocera 413ca96ea86SBastien Nocera input_mt_sync_frame(ts->input_dev); 414ca96ea86SBastien Nocera input_sync(ts->input_dev); 415ca96ea86SBastien Nocera } 416ca96ea86SBastien Nocera 417ca96ea86SBastien Nocera /** 418ca96ea86SBastien Nocera * goodix_ts_irq_handler - The IRQ handler 419ca96ea86SBastien Nocera * 420ca96ea86SBastien Nocera * @irq: interrupt number. 421ca96ea86SBastien Nocera * @dev_id: private data pointer. 422ca96ea86SBastien Nocera */ 423ca96ea86SBastien Nocera static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id) 424ca96ea86SBastien Nocera { 425ca96ea86SBastien Nocera struct goodix_ts_data *ts = dev_id; 426ca96ea86SBastien Nocera 427ca96ea86SBastien Nocera goodix_process_events(ts); 428ca96ea86SBastien Nocera 4295d655b35SIrina Tirdea if (goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0) < 0) 430ca96ea86SBastien Nocera dev_err(&ts->client->dev, "I2C write end_cmd error\n"); 431ca96ea86SBastien Nocera 432ca96ea86SBastien Nocera return IRQ_HANDLED; 433ca96ea86SBastien Nocera } 434ca96ea86SBastien Nocera 4355ab09d6aSIrina Tirdea static void goodix_free_irq(struct goodix_ts_data *ts) 4365ab09d6aSIrina Tirdea { 4375ab09d6aSIrina Tirdea devm_free_irq(&ts->client->dev, ts->client->irq, ts); 4385ab09d6aSIrina Tirdea } 4395ab09d6aSIrina Tirdea 4405ab09d6aSIrina Tirdea static int goodix_request_irq(struct goodix_ts_data *ts) 4415ab09d6aSIrina Tirdea { 4425ab09d6aSIrina Tirdea return devm_request_threaded_irq(&ts->client->dev, ts->client->irq, 4435ab09d6aSIrina Tirdea NULL, goodix_ts_irq_handler, 4445ab09d6aSIrina Tirdea ts->irq_flags, ts->client->name, ts); 4455ab09d6aSIrina Tirdea } 4465ab09d6aSIrina Tirdea 4471a67448fSHans de Goede static int goodix_check_cfg_8(struct goodix_ts_data *ts, const u8 *cfg, int len) 44868caf858SIrina Tirdea { 4491a67448fSHans de Goede int i, raw_cfg_len = len - 2; 45068caf858SIrina Tirdea u8 check_sum = 0; 45168caf858SIrina Tirdea 45268caf858SIrina Tirdea for (i = 0; i < raw_cfg_len; i++) 4531a67448fSHans de Goede check_sum += cfg[i]; 45468caf858SIrina Tirdea check_sum = (~check_sum) + 1; 4551a67448fSHans de Goede if (check_sum != cfg[raw_cfg_len]) { 45668caf858SIrina Tirdea dev_err(&ts->client->dev, 45768caf858SIrina Tirdea "The checksum of the config fw is not correct"); 45868caf858SIrina Tirdea return -EINVAL; 45968caf858SIrina Tirdea } 46068caf858SIrina Tirdea 4611a67448fSHans de Goede if (cfg[raw_cfg_len + 1] != 1) { 46268caf858SIrina Tirdea dev_err(&ts->client->dev, 46368caf858SIrina Tirdea "Config fw must have Config_Fresh register set"); 46468caf858SIrina Tirdea return -EINVAL; 46568caf858SIrina Tirdea } 46668caf858SIrina Tirdea 46768caf858SIrina Tirdea return 0; 46868caf858SIrina Tirdea } 46968caf858SIrina Tirdea 470de956caeSHans de Goede static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts) 471de956caeSHans de Goede { 472de956caeSHans de Goede int i, raw_cfg_len = ts->chip->config_len - 2; 473de956caeSHans de Goede u8 check_sum = 0; 474de956caeSHans de Goede 475de956caeSHans de Goede for (i = 0; i < raw_cfg_len; i++) 476de956caeSHans de Goede check_sum += ts->config[i]; 477de956caeSHans de Goede check_sum = (~check_sum) + 1; 478de956caeSHans de Goede 479de956caeSHans de Goede ts->config[raw_cfg_len] = check_sum; 480de956caeSHans de Goede ts->config[raw_cfg_len + 1] = 1; /* Set "config_fresh" bit */ 481de956caeSHans de Goede } 482de956caeSHans de Goede 4831a67448fSHans de Goede static int goodix_check_cfg_16(struct goodix_ts_data *ts, const u8 *cfg, 4841a67448fSHans de Goede int len) 48525309004SMarcin Niestroj { 4861a67448fSHans de Goede int i, raw_cfg_len = len - 3; 48725309004SMarcin Niestroj u16 check_sum = 0; 48825309004SMarcin Niestroj 48925309004SMarcin Niestroj for (i = 0; i < raw_cfg_len; i += 2) 4901a67448fSHans de Goede check_sum += get_unaligned_be16(&cfg[i]); 49125309004SMarcin Niestroj check_sum = (~check_sum) + 1; 4921a67448fSHans de Goede if (check_sum != get_unaligned_be16(&cfg[raw_cfg_len])) { 49325309004SMarcin Niestroj dev_err(&ts->client->dev, 49425309004SMarcin Niestroj "The checksum of the config fw is not correct"); 49525309004SMarcin Niestroj return -EINVAL; 49625309004SMarcin Niestroj } 49725309004SMarcin Niestroj 4981a67448fSHans de Goede if (cfg[raw_cfg_len + 2] != 1) { 49925309004SMarcin Niestroj dev_err(&ts->client->dev, 50025309004SMarcin Niestroj "Config fw must have Config_Fresh register set"); 50125309004SMarcin Niestroj return -EINVAL; 50225309004SMarcin Niestroj } 50325309004SMarcin Niestroj 50425309004SMarcin Niestroj return 0; 50525309004SMarcin Niestroj } 50625309004SMarcin Niestroj 507de956caeSHans de Goede static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts) 508de956caeSHans de Goede { 509de956caeSHans de Goede int i, raw_cfg_len = ts->chip->config_len - 3; 510de956caeSHans de Goede u16 check_sum = 0; 511de956caeSHans de Goede 512de956caeSHans de Goede for (i = 0; i < raw_cfg_len; i += 2) 513de956caeSHans de Goede check_sum += get_unaligned_be16(&ts->config[i]); 514de956caeSHans de Goede check_sum = (~check_sum) + 1; 515de956caeSHans de Goede 516de956caeSHans de Goede put_unaligned_be16(check_sum, &ts->config[raw_cfg_len]); 517de956caeSHans de Goede ts->config[raw_cfg_len + 2] = 1; /* Set "config_fresh" bit */ 518de956caeSHans de Goede } 519de956caeSHans de Goede 52025309004SMarcin Niestroj /** 52125309004SMarcin Niestroj * goodix_check_cfg - Checks if config fw is valid 52225309004SMarcin Niestroj * 52325309004SMarcin Niestroj * @ts: goodix_ts_data pointer 52425309004SMarcin Niestroj * @cfg: firmware config data 52525309004SMarcin Niestroj */ 5261a67448fSHans de Goede static int goodix_check_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) 52725309004SMarcin Niestroj { 5281a67448fSHans de Goede if (len < GOODIX_CONFIG_MIN_LENGTH || 5291a67448fSHans de Goede len > GOODIX_CONFIG_MAX_LENGTH) { 53025309004SMarcin Niestroj dev_err(&ts->client->dev, 53125309004SMarcin Niestroj "The length of the config fw is not correct"); 53225309004SMarcin Niestroj return -EINVAL; 53325309004SMarcin Niestroj } 53425309004SMarcin Niestroj 5351a67448fSHans de Goede return ts->chip->check_config(ts, cfg, len); 53625309004SMarcin Niestroj } 53725309004SMarcin Niestroj 53868caf858SIrina Tirdea /** 53968caf858SIrina Tirdea * goodix_send_cfg - Write fw config to device 54068caf858SIrina Tirdea * 54168caf858SIrina Tirdea * @ts: goodix_ts_data pointer 54268caf858SIrina Tirdea * @cfg: config firmware to write to device 54368caf858SIrina Tirdea */ 5441a67448fSHans de Goede static int goodix_send_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) 54568caf858SIrina Tirdea { 54668caf858SIrina Tirdea int error; 54768caf858SIrina Tirdea 5481a67448fSHans de Goede error = goodix_check_cfg(ts, cfg, len); 54968caf858SIrina Tirdea if (error) 55068caf858SIrina Tirdea return error; 55168caf858SIrina Tirdea 5521a67448fSHans de Goede error = goodix_i2c_write(ts->client, ts->chip->config_addr, cfg, len); 55368caf858SIrina Tirdea if (error) { 55468caf858SIrina Tirdea dev_err(&ts->client->dev, "Failed to write config data: %d", 55568caf858SIrina Tirdea error); 55668caf858SIrina Tirdea return error; 55768caf858SIrina Tirdea } 55868caf858SIrina Tirdea dev_dbg(&ts->client->dev, "Config sent successfully."); 55968caf858SIrina Tirdea 56068caf858SIrina Tirdea /* Let the firmware reconfigure itself, so sleep for 10ms */ 56168caf858SIrina Tirdea usleep_range(10000, 11000); 56268caf858SIrina Tirdea 56368caf858SIrina Tirdea return 0; 56468caf858SIrina Tirdea } 56568caf858SIrina Tirdea 56649db3997SHans de Goede static int goodix_irq_direction_output(struct goodix_ts_data *ts, 56749db3997SHans de Goede int value) 56849db3997SHans de Goede { 569c5fca485SHans de Goede struct device *dev = &ts->client->dev; 570c5fca485SHans de Goede acpi_status status; 571c5fca485SHans de Goede 57249db3997SHans de Goede switch (ts->irq_pin_access_method) { 57349db3997SHans de Goede case IRQ_PIN_ACCESS_NONE: 57449db3997SHans de Goede dev_err(&ts->client->dev, 57549db3997SHans de Goede "%s called without an irq_pin_access_method set\n", 57649db3997SHans de Goede __func__); 57749db3997SHans de Goede return -EINVAL; 57849db3997SHans de Goede case IRQ_PIN_ACCESS_GPIO: 57949db3997SHans de Goede return gpiod_direction_output(ts->gpiod_int, value); 580a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 581a7d4b171SHans de Goede /* 582a7d4b171SHans de Goede * The IRQ pin triggers on a falling edge, so its gets marked 583a7d4b171SHans de Goede * as active-low, use output_raw to avoid the value inversion. 584a7d4b171SHans de Goede */ 585a7d4b171SHans de Goede return gpiod_direction_output_raw(ts->gpiod_int, value); 586c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 587c5fca485SHans de Goede status = acpi_execute_simple_method(ACPI_HANDLE(dev), 588c5fca485SHans de Goede "INTO", value); 589c5fca485SHans de Goede return ACPI_SUCCESS(status) ? 0 : -EIO; 59049db3997SHans de Goede } 59149db3997SHans de Goede 59249db3997SHans de Goede return -EINVAL; /* Never reached */ 59349db3997SHans de Goede } 59449db3997SHans de Goede 59549db3997SHans de Goede static int goodix_irq_direction_input(struct goodix_ts_data *ts) 59649db3997SHans de Goede { 597c5fca485SHans de Goede struct device *dev = &ts->client->dev; 598c5fca485SHans de Goede acpi_status status; 599c5fca485SHans de Goede 60049db3997SHans de Goede switch (ts->irq_pin_access_method) { 60149db3997SHans de Goede case IRQ_PIN_ACCESS_NONE: 60249db3997SHans de Goede dev_err(&ts->client->dev, 60349db3997SHans de Goede "%s called without an irq_pin_access_method set\n", 60449db3997SHans de Goede __func__); 60549db3997SHans de Goede return -EINVAL; 60649db3997SHans de Goede case IRQ_PIN_ACCESS_GPIO: 607a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 60849db3997SHans de Goede return gpiod_direction_input(ts->gpiod_int); 609c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 610c5fca485SHans de Goede status = acpi_evaluate_object(ACPI_HANDLE(dev), "INTI", 611c5fca485SHans de Goede NULL, NULL); 612c5fca485SHans de Goede return ACPI_SUCCESS(status) ? 0 : -EIO; 61349db3997SHans de Goede } 61449db3997SHans de Goede 61549db3997SHans de Goede return -EINVAL; /* Never reached */ 61649db3997SHans de Goede } 61749db3997SHans de Goede 618ec6e1b40SIrina Tirdea static int goodix_int_sync(struct goodix_ts_data *ts) 619ec6e1b40SIrina Tirdea { 620ec6e1b40SIrina Tirdea int error; 621ec6e1b40SIrina Tirdea 62249db3997SHans de Goede error = goodix_irq_direction_output(ts, 0); 623ec6e1b40SIrina Tirdea if (error) 624ec6e1b40SIrina Tirdea return error; 625ec6e1b40SIrina Tirdea 626ec6e1b40SIrina Tirdea msleep(50); /* T5: 50ms */ 627ec6e1b40SIrina Tirdea 62849db3997SHans de Goede error = goodix_irq_direction_input(ts); 629ec6e1b40SIrina Tirdea if (error) 630ec6e1b40SIrina Tirdea return error; 631ec6e1b40SIrina Tirdea 632ec6e1b40SIrina Tirdea return 0; 633ec6e1b40SIrina Tirdea } 634ec6e1b40SIrina Tirdea 635ec6e1b40SIrina Tirdea /** 636ec6e1b40SIrina Tirdea * goodix_reset - Reset device during power on 637ec6e1b40SIrina Tirdea * 638ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 639ec6e1b40SIrina Tirdea */ 640ec6e1b40SIrina Tirdea static int goodix_reset(struct goodix_ts_data *ts) 641ec6e1b40SIrina Tirdea { 642ec6e1b40SIrina Tirdea int error; 643ec6e1b40SIrina Tirdea 644ec6e1b40SIrina Tirdea /* begin select I2C slave addr */ 645ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 0); 646ec6e1b40SIrina Tirdea if (error) 647ec6e1b40SIrina Tirdea return error; 648ec6e1b40SIrina Tirdea 649ec6e1b40SIrina Tirdea msleep(20); /* T2: > 10ms */ 650ec6e1b40SIrina Tirdea 651ec6e1b40SIrina Tirdea /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */ 65249db3997SHans de Goede error = goodix_irq_direction_output(ts, ts->client->addr == 0x14); 653ec6e1b40SIrina Tirdea if (error) 654ec6e1b40SIrina Tirdea return error; 655ec6e1b40SIrina Tirdea 656ec6e1b40SIrina Tirdea usleep_range(100, 2000); /* T3: > 100us */ 657ec6e1b40SIrina Tirdea 658ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 1); 659ec6e1b40SIrina Tirdea if (error) 660ec6e1b40SIrina Tirdea return error; 661ec6e1b40SIrina Tirdea 662ec6e1b40SIrina Tirdea usleep_range(6000, 10000); /* T4: > 5ms */ 663ec6e1b40SIrina Tirdea 664ec6e1b40SIrina Tirdea /* end select I2C slave addr */ 665ec6e1b40SIrina Tirdea error = gpiod_direction_input(ts->gpiod_rst); 666ec6e1b40SIrina Tirdea if (error) 667ec6e1b40SIrina Tirdea return error; 668ec6e1b40SIrina Tirdea 669ec6e1b40SIrina Tirdea error = goodix_int_sync(ts); 670ec6e1b40SIrina Tirdea if (error) 671ec6e1b40SIrina Tirdea return error; 672ec6e1b40SIrina Tirdea 673ec6e1b40SIrina Tirdea return 0; 674ec6e1b40SIrina Tirdea } 675ec6e1b40SIrina Tirdea 676a7d4b171SHans de Goede #if defined CONFIG_X86 && defined CONFIG_ACPI 67767abd9eeSHans de Goede #include <asm/cpu_device_id.h> 67867abd9eeSHans de Goede #include <asm/intel-family.h> 67967abd9eeSHans de Goede 68067abd9eeSHans de Goede static const struct x86_cpu_id baytrail_cpu_ids[] = { 68167abd9eeSHans de Goede { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT, X86_FEATURE_ANY, }, 68267abd9eeSHans de Goede {} 68367abd9eeSHans de Goede }; 68467abd9eeSHans de Goede 68567abd9eeSHans de Goede static inline bool is_byt(void) 68667abd9eeSHans de Goede { 68767abd9eeSHans de Goede const struct x86_cpu_id *id = x86_match_cpu(baytrail_cpu_ids); 68867abd9eeSHans de Goede 68967abd9eeSHans de Goede return !!id; 69067abd9eeSHans de Goede } 69167abd9eeSHans de Goede 692a7d4b171SHans de Goede static const struct acpi_gpio_params first_gpio = { 0, 0, false }; 693a7d4b171SHans de Goede static const struct acpi_gpio_params second_gpio = { 1, 0, false }; 694a7d4b171SHans de Goede 695a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_first_gpios[] = { 696a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &first_gpio, 1 }, 697a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &second_gpio, 1 }, 698a7d4b171SHans de Goede { }, 699a7d4b171SHans de Goede }; 700a7d4b171SHans de Goede 701a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_last_gpios[] = { 702a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 703a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &second_gpio, 1 }, 704a7d4b171SHans de Goede { }, 705a7d4b171SHans de Goede }; 706a7d4b171SHans de Goede 707c5fca485SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_reset_only_gpios[] = { 708c5fca485SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 709c5fca485SHans de Goede { }, 710c5fca485SHans de Goede }; 711c5fca485SHans de Goede 712a7d4b171SHans de Goede static int goodix_resource(struct acpi_resource *ares, void *data) 713a7d4b171SHans de Goede { 714a7d4b171SHans de Goede struct goodix_ts_data *ts = data; 715a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 716a7d4b171SHans de Goede struct acpi_resource_gpio *gpio; 717a7d4b171SHans de Goede 718a7d4b171SHans de Goede switch (ares->type) { 719a7d4b171SHans de Goede case ACPI_RESOURCE_TYPE_GPIO: 720a7d4b171SHans de Goede gpio = &ares->data.gpio; 721a7d4b171SHans de Goede if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { 722a7d4b171SHans de Goede if (ts->gpio_int_idx == -1) { 723a7d4b171SHans de Goede ts->gpio_int_idx = ts->gpio_count; 724a7d4b171SHans de Goede } else { 725a7d4b171SHans de Goede dev_err(dev, "More then one GpioInt resource, ignoring ACPI GPIO resources\n"); 726a7d4b171SHans de Goede ts->gpio_int_idx = -2; 727a7d4b171SHans de Goede } 728a7d4b171SHans de Goede } 729a7d4b171SHans de Goede ts->gpio_count++; 730a7d4b171SHans de Goede break; 731a7d4b171SHans de Goede default: 732a7d4b171SHans de Goede break; 733a7d4b171SHans de Goede } 734a7d4b171SHans de Goede 735a7d4b171SHans de Goede return 0; 736a7d4b171SHans de Goede } 737a7d4b171SHans de Goede 738a7d4b171SHans de Goede /* 739a7d4b171SHans de Goede * This function gets called in case we fail to get the irq GPIO directly 740a7d4b171SHans de Goede * because the ACPI tables lack GPIO-name to APCI _CRS index mappings 741a7d4b171SHans de Goede * (no _DSD UUID daffd814-6eba-4d8c-8a91-bc9bbf4aa301 data). 742a7d4b171SHans de Goede * In that case we add our own mapping and then goodix_get_gpio_config() 743a7d4b171SHans de Goede * retries to get the GPIOs based on the added mapping. 744a7d4b171SHans de Goede */ 745a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 746a7d4b171SHans de Goede { 747a7d4b171SHans de Goede const struct acpi_gpio_mapping *gpio_mapping = NULL; 748a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 749a7d4b171SHans de Goede LIST_HEAD(resources); 750a7d4b171SHans de Goede int ret; 751a7d4b171SHans de Goede 752a7d4b171SHans de Goede ts->gpio_count = 0; 753a7d4b171SHans de Goede ts->gpio_int_idx = -1; 754a7d4b171SHans de Goede ret = acpi_dev_get_resources(ACPI_COMPANION(dev), &resources, 755a7d4b171SHans de Goede goodix_resource, ts); 756a7d4b171SHans de Goede if (ret < 0) { 757a7d4b171SHans de Goede dev_err(dev, "Error getting ACPI resources: %d\n", ret); 758a7d4b171SHans de Goede return ret; 759a7d4b171SHans de Goede } 760a7d4b171SHans de Goede 761a7d4b171SHans de Goede acpi_dev_free_resource_list(&resources); 762a7d4b171SHans de Goede 763a7d4b171SHans de Goede if (ts->gpio_count == 2 && ts->gpio_int_idx == 0) { 764a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 765a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_first_gpios; 766a7d4b171SHans de Goede } else if (ts->gpio_count == 2 && ts->gpio_int_idx == 1) { 767a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 768a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_last_gpios; 769c5fca485SHans de Goede } else if (ts->gpio_count == 1 && ts->gpio_int_idx == -1 && 770c5fca485SHans de Goede acpi_has_method(ACPI_HANDLE(dev), "INTI") && 771c5fca485SHans de Goede acpi_has_method(ACPI_HANDLE(dev), "INTO")) { 772c5fca485SHans de Goede dev_info(dev, "Using ACPI INTI and INTO methods for IRQ pin access\n"); 773c5fca485SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_METHOD; 774c5fca485SHans de Goede gpio_mapping = acpi_goodix_reset_only_gpios; 77567abd9eeSHans de Goede } else if (is_byt() && ts->gpio_count == 2 && ts->gpio_int_idx == -1) { 77667abd9eeSHans de Goede dev_info(dev, "No ACPI GpioInt resource, assuming that the GPIO order is reset, int\n"); 77767abd9eeSHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 77867abd9eeSHans de Goede gpio_mapping = acpi_goodix_int_last_gpios; 779a7d4b171SHans de Goede } else { 780a7d4b171SHans de Goede dev_warn(dev, "Unexpected ACPI resources: gpio_count %d, gpio_int_idx %d\n", 781a7d4b171SHans de Goede ts->gpio_count, ts->gpio_int_idx); 782a7d4b171SHans de Goede return -EINVAL; 783a7d4b171SHans de Goede } 784a7d4b171SHans de Goede 785a7d4b171SHans de Goede return devm_acpi_dev_add_driver_gpios(dev, gpio_mapping); 786a7d4b171SHans de Goede } 787a7d4b171SHans de Goede #else 788a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 789a7d4b171SHans de Goede { 790a7d4b171SHans de Goede return -EINVAL; 791a7d4b171SHans de Goede } 792a7d4b171SHans de Goede #endif /* CONFIG_X86 && CONFIG_ACPI */ 793a7d4b171SHans de Goede 794ec6e1b40SIrina Tirdea /** 795ec6e1b40SIrina Tirdea * goodix_get_gpio_config - Get GPIO config from ACPI/DT 796ec6e1b40SIrina Tirdea * 797ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 798ec6e1b40SIrina Tirdea */ 799ec6e1b40SIrina Tirdea static int goodix_get_gpio_config(struct goodix_ts_data *ts) 800ec6e1b40SIrina Tirdea { 801ec6e1b40SIrina Tirdea int error; 802ec6e1b40SIrina Tirdea struct device *dev; 803ec6e1b40SIrina Tirdea struct gpio_desc *gpiod; 804a7d4b171SHans de Goede bool added_acpi_mappings = false; 805ec6e1b40SIrina Tirdea 806ec6e1b40SIrina Tirdea if (!ts->client) 807ec6e1b40SIrina Tirdea return -EINVAL; 808ec6e1b40SIrina Tirdea dev = &ts->client->dev; 809ec6e1b40SIrina Tirdea 810ae97fb58SJagan Teki ts->avdd28 = devm_regulator_get(dev, "AVDD28"); 811ae97fb58SJagan Teki if (IS_ERR(ts->avdd28)) { 812ae97fb58SJagan Teki error = PTR_ERR(ts->avdd28); 813ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 814ae97fb58SJagan Teki dev_err(dev, 815ae97fb58SJagan Teki "Failed to get AVDD28 regulator: %d\n", error); 816ae97fb58SJagan Teki return error; 817ae97fb58SJagan Teki } 818ae97fb58SJagan Teki 819ae97fb58SJagan Teki ts->vddio = devm_regulator_get(dev, "VDDIO"); 820ae97fb58SJagan Teki if (IS_ERR(ts->vddio)) { 821ae97fb58SJagan Teki error = PTR_ERR(ts->vddio); 822ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 823ae97fb58SJagan Teki dev_err(dev, 824ae97fb58SJagan Teki "Failed to get VDDIO regulator: %d\n", error); 825ae97fb58SJagan Teki return error; 826ae97fb58SJagan Teki } 827ae97fb58SJagan Teki 828a7d4b171SHans de Goede retry_get_irq_gpio: 829ec6e1b40SIrina Tirdea /* Get the interrupt GPIO pin number */ 830ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN); 831ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 832ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 833ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 834ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 835ec6e1b40SIrina Tirdea GOODIX_GPIO_INT_NAME, error); 836ec6e1b40SIrina Tirdea return error; 837ec6e1b40SIrina Tirdea } 838a7d4b171SHans de Goede if (!gpiod && has_acpi_companion(dev) && !added_acpi_mappings) { 839a7d4b171SHans de Goede added_acpi_mappings = true; 840a7d4b171SHans de Goede if (goodix_add_acpi_gpio_mappings(ts) == 0) 841a7d4b171SHans de Goede goto retry_get_irq_gpio; 842a7d4b171SHans de Goede } 843ec6e1b40SIrina Tirdea 844ec6e1b40SIrina Tirdea ts->gpiod_int = gpiod; 845ec6e1b40SIrina Tirdea 846ec6e1b40SIrina Tirdea /* Get the reset line GPIO pin number */ 847ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, GPIOD_IN); 848ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 849ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 850ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 851ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 852ec6e1b40SIrina Tirdea GOODIX_GPIO_RST_NAME, error); 853ec6e1b40SIrina Tirdea return error; 854ec6e1b40SIrina Tirdea } 855ec6e1b40SIrina Tirdea 856ec6e1b40SIrina Tirdea ts->gpiod_rst = gpiod; 857ec6e1b40SIrina Tirdea 858a7d4b171SHans de Goede switch (ts->irq_pin_access_method) { 859a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 860a7d4b171SHans de Goede /* 861a7d4b171SHans de Goede * We end up here if goodix_add_acpi_gpio_mappings() has 862a7d4b171SHans de Goede * called devm_acpi_dev_add_driver_gpios() because the ACPI 863a7d4b171SHans de Goede * tables did not contain name to index mappings. 864a7d4b171SHans de Goede * Check that we successfully got both GPIOs after we've 865a7d4b171SHans de Goede * added our own acpi_gpio_mapping and if we did not get both 866a7d4b171SHans de Goede * GPIOs reset irq_pin_access_method to IRQ_PIN_ACCESS_NONE. 867a7d4b171SHans de Goede */ 868a7d4b171SHans de Goede if (!ts->gpiod_int || !ts->gpiod_rst) 869a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 870a7d4b171SHans de Goede break; 871c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 872c5fca485SHans de Goede if (!ts->gpiod_rst) 873c5fca485SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 874c5fca485SHans de Goede break; 875a7d4b171SHans de Goede default: 876e070a97bSHans de Goede if (ts->gpiod_int && ts->gpiod_rst) { 8771921daceSHans de Goede ts->reset_controller_at_probe = true; 878e070a97bSHans de Goede ts->load_cfg_from_disk = true; 87949db3997SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_GPIO; 880e070a97bSHans de Goede } 881a7d4b171SHans de Goede } 88249db3997SHans de Goede 883ec6e1b40SIrina Tirdea return 0; 884ec6e1b40SIrina Tirdea } 885ec6e1b40SIrina Tirdea 886ca96ea86SBastien Nocera /** 887ca96ea86SBastien Nocera * goodix_read_config - Read the embedded configuration of the panel 888ca96ea86SBastien Nocera * 889ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 890ca96ea86SBastien Nocera * 891ca96ea86SBastien Nocera * Must be called during probe 892ca96ea86SBastien Nocera */ 893ca96ea86SBastien Nocera static void goodix_read_config(struct goodix_ts_data *ts) 894ca96ea86SBastien Nocera { 895fafef982SMarcin Niestroj int x_max, y_max; 896ca96ea86SBastien Nocera int error; 897ca96ea86SBastien Nocera 89825309004SMarcin Niestroj error = goodix_i2c_read(ts->client, ts->chip->config_addr, 899de956caeSHans de Goede ts->config, ts->chip->config_len); 900ca96ea86SBastien Nocera if (error) { 901fafef982SMarcin Niestroj dev_warn(&ts->client->dev, "Error reading config: %d\n", 902ca96ea86SBastien Nocera error); 903ca96ea86SBastien Nocera ts->int_trigger_type = GOODIX_INT_TRIGGER; 904a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 905ca96ea86SBastien Nocera return; 906ca96ea86SBastien Nocera } 907ca96ea86SBastien Nocera 908de956caeSHans de Goede ts->int_trigger_type = ts->config[TRIGGER_LOC] & 0x03; 909de956caeSHans de Goede ts->max_touch_num = ts->config[MAX_CONTACTS_LOC] & 0x0f; 9108b5a359cSBastien Nocera 911de956caeSHans de Goede x_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC]); 912de956caeSHans de Goede y_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC + 2]); 913fafef982SMarcin Niestroj if (x_max && y_max) { 914fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_X, x_max - 1); 915fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_Y, y_max - 1); 916ca96ea86SBastien Nocera } 917de956caeSHans de Goede 918de956caeSHans de Goede ts->chip->calc_config_checksum(ts); 91957c80e8eSKarsten Merker } 920ca96ea86SBastien Nocera 921ca96ea86SBastien Nocera /** 922ca96ea86SBastien Nocera * goodix_read_version - Read goodix touchscreen version 923ca96ea86SBastien Nocera * 92468caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 925ca96ea86SBastien Nocera */ 92668caf858SIrina Tirdea static int goodix_read_version(struct goodix_ts_data *ts) 927ca96ea86SBastien Nocera { 928ca96ea86SBastien Nocera int error; 929ca96ea86SBastien Nocera u8 buf[6]; 930e70b0307SIrina Tirdea char id_str[5]; 931ca96ea86SBastien Nocera 93268caf858SIrina Tirdea error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf)); 933ca96ea86SBastien Nocera if (error) { 93468caf858SIrina Tirdea dev_err(&ts->client->dev, "read version failed: %d\n", error); 935ca96ea86SBastien Nocera return error; 936ca96ea86SBastien Nocera } 937ca96ea86SBastien Nocera 938e70b0307SIrina Tirdea memcpy(id_str, buf, 4); 939e70b0307SIrina Tirdea id_str[4] = 0; 94068caf858SIrina Tirdea if (kstrtou16(id_str, 10, &ts->id)) 94168caf858SIrina Tirdea ts->id = 0x1001; 942e70b0307SIrina Tirdea 94368caf858SIrina Tirdea ts->version = get_unaligned_le16(&buf[4]); 944ca96ea86SBastien Nocera 94568caf858SIrina Tirdea dev_info(&ts->client->dev, "ID %d, version: %04x\n", ts->id, 94668caf858SIrina Tirdea ts->version); 947ca96ea86SBastien Nocera 948ca96ea86SBastien Nocera return 0; 949ca96ea86SBastien Nocera } 950ca96ea86SBastien Nocera 951ca96ea86SBastien Nocera /** 952ca96ea86SBastien Nocera * goodix_i2c_test - I2C test function to check if the device answers. 953ca96ea86SBastien Nocera * 954ca96ea86SBastien Nocera * @client: the i2c client 955ca96ea86SBastien Nocera */ 956ca96ea86SBastien Nocera static int goodix_i2c_test(struct i2c_client *client) 957ca96ea86SBastien Nocera { 958ca96ea86SBastien Nocera int retry = 0; 959ca96ea86SBastien Nocera int error; 960ca96ea86SBastien Nocera u8 test; 961ca96ea86SBastien Nocera 962ca96ea86SBastien Nocera while (retry++ < 2) { 96325309004SMarcin Niestroj error = goodix_i2c_read(client, GOODIX_REG_ID, 964ca96ea86SBastien Nocera &test, 1); 965ca96ea86SBastien Nocera if (!error) 966ca96ea86SBastien Nocera return 0; 967ca96ea86SBastien Nocera 968ca96ea86SBastien Nocera dev_err(&client->dev, "i2c test failed attempt %d: %d\n", 969ca96ea86SBastien Nocera retry, error); 970ca96ea86SBastien Nocera msleep(20); 971ca96ea86SBastien Nocera } 972ca96ea86SBastien Nocera 973ca96ea86SBastien Nocera return error; 974ca96ea86SBastien Nocera } 975ca96ea86SBastien Nocera 976ca96ea86SBastien Nocera /** 97768caf858SIrina Tirdea * goodix_configure_dev - Finish device initialization 97868caf858SIrina Tirdea * 97968caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 98068caf858SIrina Tirdea * 98168caf858SIrina Tirdea * Must be called from probe to finish initialization of the device. 98268caf858SIrina Tirdea * Contains the common initialization code for both devices that 98368caf858SIrina Tirdea * declare gpio pins and devices that do not. It is either called 98468caf858SIrina Tirdea * directly from probe or from request_firmware_wait callback. 98568caf858SIrina Tirdea */ 98668caf858SIrina Tirdea static int goodix_configure_dev(struct goodix_ts_data *ts) 98768caf858SIrina Tirdea { 98868caf858SIrina Tirdea int error; 98968caf858SIrina Tirdea 990fafef982SMarcin Niestroj ts->int_trigger_type = GOODIX_INT_TRIGGER; 991fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 992ad48cf5eSKarsten Merker 993fafef982SMarcin Niestroj ts->input_dev = devm_input_allocate_device(&ts->client->dev); 994fafef982SMarcin Niestroj if (!ts->input_dev) { 995fafef982SMarcin Niestroj dev_err(&ts->client->dev, "Failed to allocate input device."); 996fafef982SMarcin Niestroj return -ENOMEM; 997fafef982SMarcin Niestroj } 998fafef982SMarcin Niestroj 999fafef982SMarcin Niestroj ts->input_dev->name = "Goodix Capacitive TouchScreen"; 1000fafef982SMarcin Niestroj ts->input_dev->phys = "input/ts"; 1001fafef982SMarcin Niestroj ts->input_dev->id.bustype = BUS_I2C; 1002fafef982SMarcin Niestroj ts->input_dev->id.vendor = 0x0416; 1003fafef982SMarcin Niestroj ts->input_dev->id.product = ts->id; 1004fafef982SMarcin Niestroj ts->input_dev->id.version = ts->version; 1005fafef982SMarcin Niestroj 1006fafef982SMarcin Niestroj /* Capacitive Windows/Home button on some devices */ 1007fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_KEY, KEY_LEFTMETA); 1008fafef982SMarcin Niestroj 1009fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X); 1010fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y); 1011fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 1012fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 1013fafef982SMarcin Niestroj 1014fafef982SMarcin Niestroj /* Read configuration and apply touchscreen parameters */ 101568caf858SIrina Tirdea goodix_read_config(ts); 101668caf858SIrina Tirdea 1017fafef982SMarcin Niestroj /* Try overriding touchscreen parameters via device properties */ 1018fafef982SMarcin Niestroj touchscreen_parse_properties(ts->input_dev, true, &ts->prop); 1019fafef982SMarcin Niestroj 1020fafef982SMarcin Niestroj if (!ts->prop.max_x || !ts->prop.max_y || !ts->max_touch_num) { 1021c1c00aa5SGuido Günther dev_err(&ts->client->dev, 1022c1c00aa5SGuido Günther "Invalid config (%d, %d, %d), using defaults\n", 1023c1c00aa5SGuido Günther ts->prop.max_x, ts->prop.max_y, ts->max_touch_num); 1024fafef982SMarcin Niestroj ts->prop.max_x = GOODIX_MAX_WIDTH - 1; 1025fafef982SMarcin Niestroj ts->prop.max_y = GOODIX_MAX_HEIGHT - 1; 1026fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 1027fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 1028fafef982SMarcin Niestroj ABS_MT_POSITION_X, ts->prop.max_x); 1029fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 1030fafef982SMarcin Niestroj ABS_MT_POSITION_Y, ts->prop.max_y); 1031fafef982SMarcin Niestroj } 1032fafef982SMarcin Niestroj 1033fafef982SMarcin Niestroj if (dmi_check_system(rotated_screen)) { 1034fafef982SMarcin Niestroj ts->prop.invert_x = true; 1035fafef982SMarcin Niestroj ts->prop.invert_y = true; 1036fafef982SMarcin Niestroj dev_dbg(&ts->client->dev, 1037fafef982SMarcin Niestroj "Applying '180 degrees rotated screen' quirk\n"); 1038fafef982SMarcin Niestroj } 1039fafef982SMarcin Niestroj 1040bd3b8480SYauhen Kharuzhy if (dmi_check_system(nine_bytes_report)) { 1041bd3b8480SYauhen Kharuzhy ts->contact_size = 9; 1042bd3b8480SYauhen Kharuzhy 1043bd3b8480SYauhen Kharuzhy dev_dbg(&ts->client->dev, 1044bd3b8480SYauhen Kharuzhy "Non-standard 9-bytes report format quirk\n"); 1045bd3b8480SYauhen Kharuzhy } 1046bd3b8480SYauhen Kharuzhy 10471dd5ddc1SSergei A. Trusov if (dmi_check_system(inverted_x_screen)) { 10481dd5ddc1SSergei A. Trusov ts->prop.invert_x = true; 10491dd5ddc1SSergei A. Trusov dev_dbg(&ts->client->dev, 10501dd5ddc1SSergei A. Trusov "Applying 'inverted x screen' quirk\n"); 10511dd5ddc1SSergei A. Trusov } 10521dd5ddc1SSergei A. Trusov 1053fafef982SMarcin Niestroj error = input_mt_init_slots(ts->input_dev, ts->max_touch_num, 1054fafef982SMarcin Niestroj INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); 1055fafef982SMarcin Niestroj if (error) { 1056fafef982SMarcin Niestroj dev_err(&ts->client->dev, 1057fafef982SMarcin Niestroj "Failed to initialize MT slots: %d", error); 105868caf858SIrina Tirdea return error; 1059fafef982SMarcin Niestroj } 1060fafef982SMarcin Niestroj 1061fafef982SMarcin Niestroj error = input_register_device(ts->input_dev); 1062fafef982SMarcin Niestroj if (error) { 1063fafef982SMarcin Niestroj dev_err(&ts->client->dev, 1064fafef982SMarcin Niestroj "Failed to register input device: %d", error); 1065fafef982SMarcin Niestroj return error; 1066fafef982SMarcin Niestroj } 106768caf858SIrina Tirdea 10685ab09d6aSIrina Tirdea ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT; 10695ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 107068caf858SIrina Tirdea if (error) { 107168caf858SIrina Tirdea dev_err(&ts->client->dev, "request IRQ failed: %d\n", error); 107268caf858SIrina Tirdea return error; 107368caf858SIrina Tirdea } 107468caf858SIrina Tirdea 107568caf858SIrina Tirdea return 0; 107668caf858SIrina Tirdea } 107768caf858SIrina Tirdea 107868caf858SIrina Tirdea /** 107968caf858SIrina Tirdea * goodix_config_cb - Callback to finish device init 108068caf858SIrina Tirdea * 108168caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 108268caf858SIrina Tirdea * 108368caf858SIrina Tirdea * request_firmware_wait callback that finishes 108468caf858SIrina Tirdea * initialization of the device. 108568caf858SIrina Tirdea */ 108668caf858SIrina Tirdea static void goodix_config_cb(const struct firmware *cfg, void *ctx) 108768caf858SIrina Tirdea { 108868caf858SIrina Tirdea struct goodix_ts_data *ts = ctx; 108968caf858SIrina Tirdea int error; 109068caf858SIrina Tirdea 109168caf858SIrina Tirdea if (cfg) { 109268caf858SIrina Tirdea /* send device configuration to the firmware */ 10931a67448fSHans de Goede error = goodix_send_cfg(ts, cfg->data, cfg->size); 109468caf858SIrina Tirdea if (error) 109568caf858SIrina Tirdea goto err_release_cfg; 109668caf858SIrina Tirdea } 109768caf858SIrina Tirdea 109868caf858SIrina Tirdea goodix_configure_dev(ts); 109968caf858SIrina Tirdea 110068caf858SIrina Tirdea err_release_cfg: 110168caf858SIrina Tirdea release_firmware(cfg); 110268caf858SIrina Tirdea complete_all(&ts->firmware_loading_complete); 110368caf858SIrina Tirdea } 110468caf858SIrina Tirdea 1105ae97fb58SJagan Teki static void goodix_disable_regulators(void *arg) 1106ae97fb58SJagan Teki { 1107ae97fb58SJagan Teki struct goodix_ts_data *ts = arg; 1108ae97fb58SJagan Teki 1109ae97fb58SJagan Teki regulator_disable(ts->vddio); 1110ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1111ae97fb58SJagan Teki } 1112ae97fb58SJagan Teki 1113ca96ea86SBastien Nocera static int goodix_ts_probe(struct i2c_client *client, 1114ca96ea86SBastien Nocera const struct i2c_device_id *id) 1115ca96ea86SBastien Nocera { 1116ca96ea86SBastien Nocera struct goodix_ts_data *ts; 1117ca96ea86SBastien Nocera int error; 1118ca96ea86SBastien Nocera 1119ca96ea86SBastien Nocera dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr); 1120ca96ea86SBastien Nocera 1121ca96ea86SBastien Nocera if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 1122ca96ea86SBastien Nocera dev_err(&client->dev, "I2C check functionality failed.\n"); 1123ca96ea86SBastien Nocera return -ENXIO; 1124ca96ea86SBastien Nocera } 1125ca96ea86SBastien Nocera 1126ca96ea86SBastien Nocera ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); 1127ca96ea86SBastien Nocera if (!ts) 1128ca96ea86SBastien Nocera return -ENOMEM; 1129ca96ea86SBastien Nocera 1130ca96ea86SBastien Nocera ts->client = client; 1131ca96ea86SBastien Nocera i2c_set_clientdata(client, ts); 113268caf858SIrina Tirdea init_completion(&ts->firmware_loading_complete); 1133bd3b8480SYauhen Kharuzhy ts->contact_size = GOODIX_CONTACT_SIZE; 1134ca96ea86SBastien Nocera 1135ec6e1b40SIrina Tirdea error = goodix_get_gpio_config(ts); 1136ec6e1b40SIrina Tirdea if (error) 1137ec6e1b40SIrina Tirdea return error; 1138ec6e1b40SIrina Tirdea 1139ae97fb58SJagan Teki /* power up the controller */ 1140ae97fb58SJagan Teki error = regulator_enable(ts->avdd28); 1141ae97fb58SJagan Teki if (error) { 1142ae97fb58SJagan Teki dev_err(&client->dev, 1143ae97fb58SJagan Teki "Failed to enable AVDD28 regulator: %d\n", 1144ae97fb58SJagan Teki error); 1145ae97fb58SJagan Teki return error; 1146ae97fb58SJagan Teki } 1147ae97fb58SJagan Teki 1148ae97fb58SJagan Teki error = regulator_enable(ts->vddio); 1149ae97fb58SJagan Teki if (error) { 1150ae97fb58SJagan Teki dev_err(&client->dev, 1151ae97fb58SJagan Teki "Failed to enable VDDIO regulator: %d\n", 1152ae97fb58SJagan Teki error); 1153ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1154ae97fb58SJagan Teki return error; 1155ae97fb58SJagan Teki } 1156ae97fb58SJagan Teki 1157ae97fb58SJagan Teki error = devm_add_action_or_reset(&client->dev, 1158ae97fb58SJagan Teki goodix_disable_regulators, ts); 1159ae97fb58SJagan Teki if (error) 1160ae97fb58SJagan Teki return error; 1161ae97fb58SJagan Teki 11629e1f2d70SHans de Goede reset: 11631921daceSHans de Goede if (ts->reset_controller_at_probe) { 1164ec6e1b40SIrina Tirdea /* reset the controller */ 1165ec6e1b40SIrina Tirdea error = goodix_reset(ts); 1166ec6e1b40SIrina Tirdea if (error) { 1167ec6e1b40SIrina Tirdea dev_err(&client->dev, "Controller reset failed.\n"); 1168ec6e1b40SIrina Tirdea return error; 1169ec6e1b40SIrina Tirdea } 1170ec6e1b40SIrina Tirdea } 1171ec6e1b40SIrina Tirdea 1172ca96ea86SBastien Nocera error = goodix_i2c_test(client); 1173ca96ea86SBastien Nocera if (error) { 11749e1f2d70SHans de Goede if (!ts->reset_controller_at_probe && 11759e1f2d70SHans de Goede ts->irq_pin_access_method != IRQ_PIN_ACCESS_NONE) { 11769e1f2d70SHans de Goede /* Retry after a controller reset */ 11779e1f2d70SHans de Goede ts->reset_controller_at_probe = true; 11789e1f2d70SHans de Goede goto reset; 11799e1f2d70SHans de Goede } 1180ca96ea86SBastien Nocera dev_err(&client->dev, "I2C communication failure: %d\n", error); 1181ca96ea86SBastien Nocera return error; 1182ca96ea86SBastien Nocera } 1183ca96ea86SBastien Nocera 118468caf858SIrina Tirdea error = goodix_read_version(ts); 1185ca96ea86SBastien Nocera if (error) { 1186ca96ea86SBastien Nocera dev_err(&client->dev, "Read version failed.\n"); 1187ca96ea86SBastien Nocera return error; 1188ca96ea86SBastien Nocera } 1189ca96ea86SBastien Nocera 119025309004SMarcin Niestroj ts->chip = goodix_get_chip_data(ts->id); 1191a779fbc6SIrina Tirdea 1192e070a97bSHans de Goede if (ts->load_cfg_from_disk) { 119368caf858SIrina Tirdea /* update device config */ 119468caf858SIrina Tirdea ts->cfg_name = devm_kasprintf(&client->dev, GFP_KERNEL, 119568caf858SIrina Tirdea "goodix_%d_cfg.bin", ts->id); 119668caf858SIrina Tirdea if (!ts->cfg_name) 119768caf858SIrina Tirdea return -ENOMEM; 1198ca96ea86SBastien Nocera 119968caf858SIrina Tirdea error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name, 120068caf858SIrina Tirdea &client->dev, GFP_KERNEL, ts, 120168caf858SIrina Tirdea goodix_config_cb); 1202ca96ea86SBastien Nocera if (error) { 120368caf858SIrina Tirdea dev_err(&client->dev, 120468caf858SIrina Tirdea "Failed to invoke firmware loader: %d\n", 120568caf858SIrina Tirdea error); 1206ca96ea86SBastien Nocera return error; 1207ca96ea86SBastien Nocera } 1208ca96ea86SBastien Nocera 1209ca96ea86SBastien Nocera return 0; 121068caf858SIrina Tirdea } else { 121168caf858SIrina Tirdea error = goodix_configure_dev(ts); 121268caf858SIrina Tirdea if (error) 121368caf858SIrina Tirdea return error; 121468caf858SIrina Tirdea } 121568caf858SIrina Tirdea 121668caf858SIrina Tirdea return 0; 121768caf858SIrina Tirdea } 121868caf858SIrina Tirdea 121968caf858SIrina Tirdea static int goodix_ts_remove(struct i2c_client *client) 122068caf858SIrina Tirdea { 122168caf858SIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 122268caf858SIrina Tirdea 1223e070a97bSHans de Goede if (ts->load_cfg_from_disk) 122468caf858SIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 122568caf858SIrina Tirdea 122668caf858SIrina Tirdea return 0; 1227ca96ea86SBastien Nocera } 1228ca96ea86SBastien Nocera 12295ab09d6aSIrina Tirdea static int __maybe_unused goodix_suspend(struct device *dev) 12305ab09d6aSIrina Tirdea { 12315ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 12325ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 12335ab09d6aSIrina Tirdea int error; 12345ab09d6aSIrina Tirdea 1235e070a97bSHans de Goede if (ts->load_cfg_from_disk) 1236e070a97bSHans de Goede wait_for_completion(&ts->firmware_loading_complete); 1237e070a97bSHans de Goede 12385ab09d6aSIrina Tirdea /* We need gpio pins to suspend/resume */ 123949db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1240faec44b6SHans de Goede disable_irq(client->irq); 12415ab09d6aSIrina Tirdea return 0; 1242faec44b6SHans de Goede } 12435ab09d6aSIrina Tirdea 12445ab09d6aSIrina Tirdea /* Free IRQ as IRQ pin is used as output in the suspend sequence */ 12455ab09d6aSIrina Tirdea goodix_free_irq(ts); 12465ab09d6aSIrina Tirdea 12475ab09d6aSIrina Tirdea /* Output LOW on the INT pin for 5 ms */ 124849db3997SHans de Goede error = goodix_irq_direction_output(ts, 0); 12495ab09d6aSIrina Tirdea if (error) { 12505ab09d6aSIrina Tirdea goodix_request_irq(ts); 12515ab09d6aSIrina Tirdea return error; 12525ab09d6aSIrina Tirdea } 12535ab09d6aSIrina Tirdea 12545ab09d6aSIrina Tirdea usleep_range(5000, 6000); 12555ab09d6aSIrina Tirdea 12565ab09d6aSIrina Tirdea error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND, 12575ab09d6aSIrina Tirdea GOODIX_CMD_SCREEN_OFF); 12585ab09d6aSIrina Tirdea if (error) { 12595ab09d6aSIrina Tirdea dev_err(&ts->client->dev, "Screen off command failed\n"); 126049db3997SHans de Goede goodix_irq_direction_input(ts); 12615ab09d6aSIrina Tirdea goodix_request_irq(ts); 12625ab09d6aSIrina Tirdea return -EAGAIN; 12635ab09d6aSIrina Tirdea } 12645ab09d6aSIrina Tirdea 12655ab09d6aSIrina Tirdea /* 12665ab09d6aSIrina Tirdea * The datasheet specifies that the interval between sending screen-off 12675ab09d6aSIrina Tirdea * command and wake-up should be longer than 58 ms. To avoid waking up 12685ab09d6aSIrina Tirdea * sooner, delay 58ms here. 12695ab09d6aSIrina Tirdea */ 12705ab09d6aSIrina Tirdea msleep(58); 12715ab09d6aSIrina Tirdea return 0; 12725ab09d6aSIrina Tirdea } 12735ab09d6aSIrina Tirdea 12745ab09d6aSIrina Tirdea static int __maybe_unused goodix_resume(struct device *dev) 12755ab09d6aSIrina Tirdea { 12765ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 12775ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 1278273ec6bdSHans de Goede u8 config_ver; 12795ab09d6aSIrina Tirdea int error; 12805ab09d6aSIrina Tirdea 128149db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1282faec44b6SHans de Goede enable_irq(client->irq); 12835ab09d6aSIrina Tirdea return 0; 1284faec44b6SHans de Goede } 12855ab09d6aSIrina Tirdea 12865ab09d6aSIrina Tirdea /* 12875ab09d6aSIrina Tirdea * Exit sleep mode by outputting HIGH level to INT pin 12885ab09d6aSIrina Tirdea * for 2ms~5ms. 12895ab09d6aSIrina Tirdea */ 129049db3997SHans de Goede error = goodix_irq_direction_output(ts, 1); 12915ab09d6aSIrina Tirdea if (error) 12925ab09d6aSIrina Tirdea return error; 12935ab09d6aSIrina Tirdea 12945ab09d6aSIrina Tirdea usleep_range(2000, 5000); 12955ab09d6aSIrina Tirdea 12965ab09d6aSIrina Tirdea error = goodix_int_sync(ts); 12975ab09d6aSIrina Tirdea if (error) 12985ab09d6aSIrina Tirdea return error; 12995ab09d6aSIrina Tirdea 1300273ec6bdSHans de Goede error = goodix_i2c_read(ts->client, ts->chip->config_addr, 1301273ec6bdSHans de Goede &config_ver, 1); 1302273ec6bdSHans de Goede if (error) 1303273ec6bdSHans de Goede dev_warn(dev, "Error reading config version: %d, resetting controller\n", 1304273ec6bdSHans de Goede error); 1305273ec6bdSHans de Goede else if (config_ver != ts->config[0]) 1306273ec6bdSHans de Goede dev_info(dev, "Config version mismatch %d != %d, resetting controller\n", 1307273ec6bdSHans de Goede config_ver, ts->config[0]); 1308273ec6bdSHans de Goede 1309273ec6bdSHans de Goede if (error != 0 || config_ver != ts->config[0]) { 1310273ec6bdSHans de Goede error = goodix_reset(ts); 1311273ec6bdSHans de Goede if (error) { 1312273ec6bdSHans de Goede dev_err(dev, "Controller reset failed.\n"); 1313273ec6bdSHans de Goede return error; 1314273ec6bdSHans de Goede } 1315273ec6bdSHans de Goede 1316273ec6bdSHans de Goede error = goodix_send_cfg(ts, ts->config, ts->chip->config_len); 1317273ec6bdSHans de Goede if (error) 1318273ec6bdSHans de Goede return error; 1319273ec6bdSHans de Goede } 1320273ec6bdSHans de Goede 13215ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 13225ab09d6aSIrina Tirdea if (error) 13235ab09d6aSIrina Tirdea return error; 13245ab09d6aSIrina Tirdea 13255ab09d6aSIrina Tirdea return 0; 13265ab09d6aSIrina Tirdea } 13275ab09d6aSIrina Tirdea 13285ab09d6aSIrina Tirdea static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume); 13295ab09d6aSIrina Tirdea 1330ca96ea86SBastien Nocera static const struct i2c_device_id goodix_ts_id[] = { 1331ca96ea86SBastien Nocera { "GDIX1001:00", 0 }, 1332ca96ea86SBastien Nocera { } 1333ca96ea86SBastien Nocera }; 13342e9e910eSJavier Martinez Canillas MODULE_DEVICE_TABLE(i2c, goodix_ts_id); 1335ca96ea86SBastien Nocera 1336771d8f1bSAleksei Mamlin #ifdef CONFIG_ACPI 1337ca96ea86SBastien Nocera static const struct acpi_device_id goodix_acpi_match[] = { 1338ca96ea86SBastien Nocera { "GDIX1001", 0 }, 13395ca4d1aeSEthan Lee { "GDIX1002", 0 }, 1340ca96ea86SBastien Nocera { } 1341ca96ea86SBastien Nocera }; 1342ca96ea86SBastien Nocera MODULE_DEVICE_TABLE(acpi, goodix_acpi_match); 1343771d8f1bSAleksei Mamlin #endif 1344771d8f1bSAleksei Mamlin 1345771d8f1bSAleksei Mamlin #ifdef CONFIG_OF 1346771d8f1bSAleksei Mamlin static const struct of_device_id goodix_of_match[] = { 134725309004SMarcin Niestroj { .compatible = "goodix,gt1151" }, 1348a5f50c50SJagan Teki { .compatible = "goodix,gt5663" }, 134984ef1b33SGuido Günther { .compatible = "goodix,gt5688" }, 1350771d8f1bSAleksei Mamlin { .compatible = "goodix,gt911" }, 1351771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9110" }, 1352771d8f1bSAleksei Mamlin { .compatible = "goodix,gt912" }, 1353771d8f1bSAleksei Mamlin { .compatible = "goodix,gt927" }, 1354771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9271" }, 1355771d8f1bSAleksei Mamlin { .compatible = "goodix,gt928" }, 1356771d8f1bSAleksei Mamlin { .compatible = "goodix,gt967" }, 1357771d8f1bSAleksei Mamlin { } 1358771d8f1bSAleksei Mamlin }; 1359771d8f1bSAleksei Mamlin MODULE_DEVICE_TABLE(of, goodix_of_match); 1360771d8f1bSAleksei Mamlin #endif 1361ca96ea86SBastien Nocera 1362ca96ea86SBastien Nocera static struct i2c_driver goodix_ts_driver = { 1363ca96ea86SBastien Nocera .probe = goodix_ts_probe, 136468caf858SIrina Tirdea .remove = goodix_ts_remove, 1365ca96ea86SBastien Nocera .id_table = goodix_ts_id, 1366ca96ea86SBastien Nocera .driver = { 1367ca96ea86SBastien Nocera .name = "Goodix-TS", 1368771d8f1bSAleksei Mamlin .acpi_match_table = ACPI_PTR(goodix_acpi_match), 1369771d8f1bSAleksei Mamlin .of_match_table = of_match_ptr(goodix_of_match), 13705ab09d6aSIrina Tirdea .pm = &goodix_pm_ops, 1371ca96ea86SBastien Nocera }, 1372ca96ea86SBastien Nocera }; 1373ca96ea86SBastien Nocera module_i2c_driver(goodix_ts_driver); 1374ca96ea86SBastien Nocera 1375ca96ea86SBastien Nocera MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); 1376ca96ea86SBastien Nocera MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>"); 1377ca96ea86SBastien Nocera MODULE_DESCRIPTION("Goodix touchscreen driver"); 1378ca96ea86SBastien Nocera MODULE_LICENSE("GPL v2"); 1379