1b886d83cSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2ca96ea86SBastien Nocera /* 3ca96ea86SBastien Nocera * Driver for Goodix Touchscreens 4ca96ea86SBastien Nocera * 5ca96ea86SBastien Nocera * Copyright (c) 2014 Red Hat Inc. 6ad48cf5eSKarsten Merker * Copyright (c) 2015 K. Merker <merker@debian.org> 7ca96ea86SBastien Nocera * 8ca96ea86SBastien Nocera * This code is based on gt9xx.c authored by andrew@goodix.com: 9ca96ea86SBastien Nocera * 10ca96ea86SBastien Nocera * 2010 - 2012 Goodix Technology. 11ca96ea86SBastien Nocera */ 12ca96ea86SBastien Nocera 13ca96ea86SBastien Nocera 14ca96ea86SBastien Nocera #include <linux/kernel.h> 158b5a359cSBastien Nocera #include <linux/dmi.h> 1668caf858SIrina Tirdea #include <linux/firmware.h> 17ec6e1b40SIrina Tirdea #include <linux/gpio/consumer.h> 18ca96ea86SBastien Nocera #include <linux/i2c.h> 19ca96ea86SBastien Nocera #include <linux/input.h> 20ca96ea86SBastien Nocera #include <linux/input/mt.h> 21fafef982SMarcin Niestroj #include <linux/input/touchscreen.h> 22ca96ea86SBastien Nocera #include <linux/module.h> 23ca96ea86SBastien Nocera #include <linux/delay.h> 24ca96ea86SBastien Nocera #include <linux/irq.h> 25ca96ea86SBastien Nocera #include <linux/interrupt.h> 26ae97fb58SJagan Teki #include <linux/regulator/consumer.h> 27ca96ea86SBastien Nocera #include <linux/slab.h> 28771d8f1bSAleksei Mamlin #include <linux/acpi.h> 29771d8f1bSAleksei Mamlin #include <linux/of.h> 30ca96ea86SBastien Nocera #include <asm/unaligned.h> 31ca96ea86SBastien Nocera 32aebfc52cSHans de Goede #define GOODIX_GPIO_INT_NAME "irq" 33aebfc52cSHans de Goede #define GOODIX_GPIO_RST_NAME "reset" 34aebfc52cSHans de Goede 35aebfc52cSHans de Goede #define GOODIX_MAX_HEIGHT 4096 36aebfc52cSHans de Goede #define GOODIX_MAX_WIDTH 4096 37aebfc52cSHans de Goede #define GOODIX_INT_TRIGGER 1 38aebfc52cSHans de Goede #define GOODIX_CONTACT_SIZE 8 39aebfc52cSHans de Goede #define GOODIX_MAX_CONTACT_SIZE 9 40aebfc52cSHans de Goede #define GOODIX_MAX_CONTACTS 10 41aebfc52cSHans de Goede 42aebfc52cSHans de Goede #define GOODIX_CONFIG_MAX_LENGTH 240 43aebfc52cSHans de Goede #define GOODIX_CONFIG_911_LENGTH 186 44aebfc52cSHans de Goede #define GOODIX_CONFIG_967_LENGTH 228 45aebfc52cSHans de Goede 46aebfc52cSHans de Goede /* Register defines */ 47aebfc52cSHans de Goede #define GOODIX_REG_COMMAND 0x8040 48aebfc52cSHans de Goede #define GOODIX_CMD_SCREEN_OFF 0x05 49aebfc52cSHans de Goede 50aebfc52cSHans de Goede #define GOODIX_READ_COOR_ADDR 0x814E 51aebfc52cSHans de Goede #define GOODIX_GT1X_REG_CONFIG_DATA 0x8050 52aebfc52cSHans de Goede #define GOODIX_GT9X_REG_CONFIG_DATA 0x8047 53aebfc52cSHans de Goede #define GOODIX_REG_ID 0x8140 54aebfc52cSHans de Goede 55aebfc52cSHans de Goede #define GOODIX_BUFFER_STATUS_READY BIT(7) 56aebfc52cSHans de Goede #define GOODIX_BUFFER_STATUS_TIMEOUT 20 57aebfc52cSHans de Goede 58aebfc52cSHans de Goede #define RESOLUTION_LOC 1 59aebfc52cSHans de Goede #define MAX_CONTACTS_LOC 5 60aebfc52cSHans de Goede #define TRIGGER_LOC 6 61aebfc52cSHans de Goede 6225309004SMarcin Niestroj struct goodix_ts_data; 6325309004SMarcin Niestroj 6449db3997SHans de Goede enum goodix_irq_pin_access_method { 6549db3997SHans de Goede IRQ_PIN_ACCESS_NONE, 6649db3997SHans de Goede IRQ_PIN_ACCESS_GPIO, 67a7d4b171SHans de Goede IRQ_PIN_ACCESS_ACPI_GPIO, 68c5fca485SHans de Goede IRQ_PIN_ACCESS_ACPI_METHOD, 6949db3997SHans de Goede }; 7049db3997SHans de Goede 7125309004SMarcin Niestroj struct goodix_chip_data { 7225309004SMarcin Niestroj u16 config_addr; 7325309004SMarcin Niestroj int config_len; 7425309004SMarcin Niestroj int (*check_config)(struct goodix_ts_data *, const struct firmware *); 75de956caeSHans de Goede void (*calc_config_checksum)(struct goodix_ts_data *ts); 7625309004SMarcin Niestroj }; 7725309004SMarcin Niestroj 78ca96ea86SBastien Nocera struct goodix_ts_data { 79ca96ea86SBastien Nocera struct i2c_client *client; 80ca96ea86SBastien Nocera struct input_dev *input_dev; 8125309004SMarcin Niestroj const struct goodix_chip_data *chip; 82fafef982SMarcin Niestroj struct touchscreen_properties prop; 83ca96ea86SBastien Nocera unsigned int max_touch_num; 84ca96ea86SBastien Nocera unsigned int int_trigger_type; 85ae97fb58SJagan Teki struct regulator *avdd28; 86ae97fb58SJagan Teki struct regulator *vddio; 87ec6e1b40SIrina Tirdea struct gpio_desc *gpiod_int; 88ec6e1b40SIrina Tirdea struct gpio_desc *gpiod_rst; 89a7d4b171SHans de Goede int gpio_count; 90a7d4b171SHans de Goede int gpio_int_idx; 9168caf858SIrina Tirdea u16 id; 9268caf858SIrina Tirdea u16 version; 9368caf858SIrina Tirdea const char *cfg_name; 941921daceSHans de Goede bool reset_controller_at_probe; 95e070a97bSHans de Goede bool load_cfg_from_disk; 9668caf858SIrina Tirdea struct completion firmware_loading_complete; 975ab09d6aSIrina Tirdea unsigned long irq_flags; 9849db3997SHans de Goede enum goodix_irq_pin_access_method irq_pin_access_method; 99bd3b8480SYauhen Kharuzhy unsigned int contact_size; 100de956caeSHans de Goede u8 config[GOODIX_CONFIG_MAX_LENGTH]; 101ca96ea86SBastien Nocera }; 102ca96ea86SBastien Nocera 10325309004SMarcin Niestroj static int goodix_check_cfg_8(struct goodix_ts_data *ts, 10425309004SMarcin Niestroj const struct firmware *cfg); 10525309004SMarcin Niestroj static int goodix_check_cfg_16(struct goodix_ts_data *ts, 10625309004SMarcin Niestroj const struct firmware *cfg); 107de956caeSHans de Goede static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts); 108de956caeSHans de Goede static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts); 10925309004SMarcin Niestroj 11025309004SMarcin Niestroj static const struct goodix_chip_data gt1x_chip_data = { 11125309004SMarcin Niestroj .config_addr = GOODIX_GT1X_REG_CONFIG_DATA, 11225309004SMarcin Niestroj .config_len = GOODIX_CONFIG_MAX_LENGTH, 11325309004SMarcin Niestroj .check_config = goodix_check_cfg_16, 114de956caeSHans de Goede .calc_config_checksum = goodix_calc_cfg_checksum_16, 11525309004SMarcin Niestroj }; 11625309004SMarcin Niestroj 11725309004SMarcin Niestroj static const struct goodix_chip_data gt911_chip_data = { 11825309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 11925309004SMarcin Niestroj .config_len = GOODIX_CONFIG_911_LENGTH, 12025309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 121de956caeSHans de Goede .calc_config_checksum = goodix_calc_cfg_checksum_8, 12225309004SMarcin Niestroj }; 12325309004SMarcin Niestroj 12425309004SMarcin Niestroj static const struct goodix_chip_data gt967_chip_data = { 12525309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 12625309004SMarcin Niestroj .config_len = GOODIX_CONFIG_967_LENGTH, 12725309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 128de956caeSHans de Goede .calc_config_checksum = goodix_calc_cfg_checksum_8, 12925309004SMarcin Niestroj }; 13025309004SMarcin Niestroj 13125309004SMarcin Niestroj static const struct goodix_chip_data gt9x_chip_data = { 13225309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 13325309004SMarcin Niestroj .config_len = GOODIX_CONFIG_MAX_LENGTH, 13425309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 135de956caeSHans de Goede .calc_config_checksum = goodix_calc_cfg_checksum_8, 13625309004SMarcin Niestroj }; 13725309004SMarcin Niestroj 138ca96ea86SBastien Nocera static const unsigned long goodix_irq_flags[] = { 139ca96ea86SBastien Nocera IRQ_TYPE_EDGE_RISING, 140ca96ea86SBastien Nocera IRQ_TYPE_EDGE_FALLING, 141ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_LOW, 142ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_HIGH, 143ca96ea86SBastien Nocera }; 144ca96ea86SBastien Nocera 1458b5a359cSBastien Nocera /* 1468b5a359cSBastien Nocera * Those tablets have their coordinates origin at the bottom right 1478b5a359cSBastien Nocera * of the tablet, as if rotated 180 degrees 1488b5a359cSBastien Nocera */ 1498b5a359cSBastien Nocera static const struct dmi_system_id rotated_screen[] = { 1508b5a359cSBastien Nocera #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1518b5a359cSBastien Nocera { 152df5b5e55SHans de Goede .ident = "Teclast X89", 153df5b5e55SHans de Goede .matches = { 154df5b5e55SHans de Goede /* tPAD is too generic, also match on bios date */ 155df5b5e55SHans de Goede DMI_MATCH(DMI_BOARD_VENDOR, "TECLAST"), 156df5b5e55SHans de Goede DMI_MATCH(DMI_BOARD_NAME, "tPAD"), 157df5b5e55SHans de Goede DMI_MATCH(DMI_BIOS_DATE, "12/19/2014"), 158df5b5e55SHans de Goede }, 159df5b5e55SHans de Goede }, 160df5b5e55SHans de Goede { 1618b5a359cSBastien Nocera .ident = "WinBook TW100", 1628b5a359cSBastien Nocera .matches = { 1638b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 1648b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW100") 1658b5a359cSBastien Nocera } 1668b5a359cSBastien Nocera }, 1678b5a359cSBastien Nocera { 1688b5a359cSBastien Nocera .ident = "WinBook TW700", 1698b5a359cSBastien Nocera .matches = { 1708b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 1718b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW700") 1728b5a359cSBastien Nocera }, 1738b5a359cSBastien Nocera }, 1748b5a359cSBastien Nocera #endif 1758b5a359cSBastien Nocera {} 1768b5a359cSBastien Nocera }; 1778b5a359cSBastien Nocera 178bd3b8480SYauhen Kharuzhy static const struct dmi_system_id nine_bytes_report[] = { 179bd3b8480SYauhen Kharuzhy #if defined(CONFIG_DMI) && defined(CONFIG_X86) 180bd3b8480SYauhen Kharuzhy { 181bd3b8480SYauhen Kharuzhy .ident = "Lenovo YogaBook", 182bd3b8480SYauhen Kharuzhy /* YB1-X91L/F and YB1-X90L/F */ 183bd3b8480SYauhen Kharuzhy .matches = { 184bd3b8480SYauhen Kharuzhy DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X9") 185bd3b8480SYauhen Kharuzhy } 186bd3b8480SYauhen Kharuzhy }, 187bd3b8480SYauhen Kharuzhy #endif 188bd3b8480SYauhen Kharuzhy {} 189bd3b8480SYauhen Kharuzhy }; 190bd3b8480SYauhen Kharuzhy 1911dd5ddc1SSergei A. Trusov /* 1921dd5ddc1SSergei A. Trusov * Those tablets have their x coordinate inverted 1931dd5ddc1SSergei A. Trusov */ 1941dd5ddc1SSergei A. Trusov static const struct dmi_system_id inverted_x_screen[] = { 1951dd5ddc1SSergei A. Trusov #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1961dd5ddc1SSergei A. Trusov { 1971dd5ddc1SSergei A. Trusov .ident = "Cube I15-TC", 1981dd5ddc1SSergei A. Trusov .matches = { 1991dd5ddc1SSergei A. Trusov DMI_MATCH(DMI_SYS_VENDOR, "Cube"), 2001dd5ddc1SSergei A. Trusov DMI_MATCH(DMI_PRODUCT_NAME, "I15-TC") 2011dd5ddc1SSergei A. Trusov }, 2021dd5ddc1SSergei A. Trusov }, 2031dd5ddc1SSergei A. Trusov #endif 2041dd5ddc1SSergei A. Trusov {} 2051dd5ddc1SSergei A. Trusov }; 2061dd5ddc1SSergei A. Trusov 207ca96ea86SBastien Nocera /** 208ca96ea86SBastien Nocera * goodix_i2c_read - read data from a register of the i2c slave device. 209ca96ea86SBastien Nocera * 210ca96ea86SBastien Nocera * @client: i2c device. 211ca96ea86SBastien Nocera * @reg: the register to read from. 212ca96ea86SBastien Nocera * @buf: raw write data buffer. 213ca96ea86SBastien Nocera * @len: length of the buffer to write 214ca96ea86SBastien Nocera */ 215ca96ea86SBastien Nocera static int goodix_i2c_read(struct i2c_client *client, 216ca96ea86SBastien Nocera u16 reg, u8 *buf, int len) 217ca96ea86SBastien Nocera { 218ca96ea86SBastien Nocera struct i2c_msg msgs[2]; 219fafef982SMarcin Niestroj __be16 wbuf = cpu_to_be16(reg); 220ca96ea86SBastien Nocera int ret; 221ca96ea86SBastien Nocera 222ca96ea86SBastien Nocera msgs[0].flags = 0; 223ca96ea86SBastien Nocera msgs[0].addr = client->addr; 224ca96ea86SBastien Nocera msgs[0].len = 2; 225ca96ea86SBastien Nocera msgs[0].buf = (u8 *)&wbuf; 226ca96ea86SBastien Nocera 227ca96ea86SBastien Nocera msgs[1].flags = I2C_M_RD; 228ca96ea86SBastien Nocera msgs[1].addr = client->addr; 229ca96ea86SBastien Nocera msgs[1].len = len; 230ca96ea86SBastien Nocera msgs[1].buf = buf; 231ca96ea86SBastien Nocera 232ca96ea86SBastien Nocera ret = i2c_transfer(client->adapter, msgs, 2); 233ca96ea86SBastien Nocera return ret < 0 ? ret : (ret != ARRAY_SIZE(msgs) ? -EIO : 0); 234ca96ea86SBastien Nocera } 235ca96ea86SBastien Nocera 23668caf858SIrina Tirdea /** 23768caf858SIrina Tirdea * goodix_i2c_write - write data to a register of the i2c slave device. 23868caf858SIrina Tirdea * 23968caf858SIrina Tirdea * @client: i2c device. 24068caf858SIrina Tirdea * @reg: the register to write to. 24168caf858SIrina Tirdea * @buf: raw data buffer to write. 24268caf858SIrina Tirdea * @len: length of the buffer to write 24368caf858SIrina Tirdea */ 24468caf858SIrina Tirdea static int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf, 24568caf858SIrina Tirdea unsigned len) 24668caf858SIrina Tirdea { 24768caf858SIrina Tirdea u8 *addr_buf; 24868caf858SIrina Tirdea struct i2c_msg msg; 24968caf858SIrina Tirdea int ret; 25068caf858SIrina Tirdea 25168caf858SIrina Tirdea addr_buf = kmalloc(len + 2, GFP_KERNEL); 25268caf858SIrina Tirdea if (!addr_buf) 25368caf858SIrina Tirdea return -ENOMEM; 25468caf858SIrina Tirdea 25568caf858SIrina Tirdea addr_buf[0] = reg >> 8; 25668caf858SIrina Tirdea addr_buf[1] = reg & 0xFF; 25768caf858SIrina Tirdea memcpy(&addr_buf[2], buf, len); 25868caf858SIrina Tirdea 25968caf858SIrina Tirdea msg.flags = 0; 26068caf858SIrina Tirdea msg.addr = client->addr; 26168caf858SIrina Tirdea msg.buf = addr_buf; 26268caf858SIrina Tirdea msg.len = len + 2; 26368caf858SIrina Tirdea 26468caf858SIrina Tirdea ret = i2c_transfer(client->adapter, &msg, 1); 26568caf858SIrina Tirdea kfree(addr_buf); 26668caf858SIrina Tirdea return ret < 0 ? ret : (ret != 1 ? -EIO : 0); 26768caf858SIrina Tirdea } 26868caf858SIrina Tirdea 2695ab09d6aSIrina Tirdea static int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value) 2705ab09d6aSIrina Tirdea { 2715ab09d6aSIrina Tirdea return goodix_i2c_write(client, reg, &value, sizeof(value)); 2725ab09d6aSIrina Tirdea } 2735ab09d6aSIrina Tirdea 27425309004SMarcin Niestroj static const struct goodix_chip_data *goodix_get_chip_data(u16 id) 275a779fbc6SIrina Tirdea { 276a779fbc6SIrina Tirdea switch (id) { 27725309004SMarcin Niestroj case 1151: 278a5f50c50SJagan Teki case 5663: 27984ef1b33SGuido Günther case 5688: 28025309004SMarcin Niestroj return >1x_chip_data; 28125309004SMarcin Niestroj 282a779fbc6SIrina Tirdea case 911: 283a779fbc6SIrina Tirdea case 9271: 284a779fbc6SIrina Tirdea case 9110: 285a779fbc6SIrina Tirdea case 927: 286a779fbc6SIrina Tirdea case 928: 28725309004SMarcin Niestroj return >911_chip_data; 288a779fbc6SIrina Tirdea 289a779fbc6SIrina Tirdea case 912: 290a779fbc6SIrina Tirdea case 967: 29125309004SMarcin Niestroj return >967_chip_data; 292a779fbc6SIrina Tirdea 293a779fbc6SIrina Tirdea default: 29425309004SMarcin Niestroj return >9x_chip_data; 295a779fbc6SIrina Tirdea } 296a779fbc6SIrina Tirdea } 297a779fbc6SIrina Tirdea 298ca96ea86SBastien Nocera static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data) 299ca96ea86SBastien Nocera { 3009b5db7aaSPaul Cercueil unsigned long max_timeout; 301ca96ea86SBastien Nocera int touch_num; 302ca96ea86SBastien Nocera int error; 303ca96ea86SBastien Nocera 3049b5db7aaSPaul Cercueil /* 3059b5db7aaSPaul Cercueil * The 'buffer status' bit, which indicates that the data is valid, is 3069b5db7aaSPaul Cercueil * not set as soon as the interrupt is raised, but slightly after. 3079b5db7aaSPaul Cercueil * This takes around 10 ms to happen, so we poll for 20 ms. 3089b5db7aaSPaul Cercueil */ 3099b5db7aaSPaul Cercueil max_timeout = jiffies + msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT); 3109b5db7aaSPaul Cercueil do { 3119b5db7aaSPaul Cercueil error = goodix_i2c_read(ts->client, GOODIX_READ_COOR_ADDR, 312bd3b8480SYauhen Kharuzhy data, ts->contact_size + 1); 313ca96ea86SBastien Nocera if (error) { 3149b5db7aaSPaul Cercueil dev_err(&ts->client->dev, "I2C transfer error: %d\n", 3159b5db7aaSPaul Cercueil error); 316ca96ea86SBastien Nocera return error; 317ca96ea86SBastien Nocera } 318ca96ea86SBastien Nocera 3199b5db7aaSPaul Cercueil if (data[0] & GOODIX_BUFFER_STATUS_READY) { 320ca96ea86SBastien Nocera touch_num = data[0] & 0x0f; 321a7ac7c95SAleksei Mamlin if (touch_num > ts->max_touch_num) 322ca96ea86SBastien Nocera return -EPROTO; 323ca96ea86SBastien Nocera 324ca96ea86SBastien Nocera if (touch_num > 1) { 325bd3b8480SYauhen Kharuzhy data += 1 + ts->contact_size; 326ca96ea86SBastien Nocera error = goodix_i2c_read(ts->client, 327ca96ea86SBastien Nocera GOODIX_READ_COOR_ADDR + 328bd3b8480SYauhen Kharuzhy 1 + ts->contact_size, 329ca96ea86SBastien Nocera data, 330bd3b8480SYauhen Kharuzhy ts->contact_size * 3319b5db7aaSPaul Cercueil (touch_num - 1)); 332ca96ea86SBastien Nocera if (error) 333ca96ea86SBastien Nocera return error; 334ca96ea86SBastien Nocera } 335ca96ea86SBastien Nocera 336ca96ea86SBastien Nocera return touch_num; 337ca96ea86SBastien Nocera } 338ca96ea86SBastien Nocera 3399b5db7aaSPaul Cercueil usleep_range(1000, 2000); /* Poll every 1 - 2 ms */ 3409b5db7aaSPaul Cercueil } while (time_before(jiffies, max_timeout)); 3419b5db7aaSPaul Cercueil 3429b5db7aaSPaul Cercueil /* 3439b5db7aaSPaul Cercueil * The Goodix panel will send spurious interrupts after a 3449b5db7aaSPaul Cercueil * 'finger up' event, which will always cause a timeout. 3459b5db7aaSPaul Cercueil */ 3469b5db7aaSPaul Cercueil return 0; 3479b5db7aaSPaul Cercueil } 3489b5db7aaSPaul Cercueil 349bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_8b(struct goodix_ts_data *ts, u8 *coor_data) 350ca96ea86SBastien Nocera { 351ca96ea86SBastien Nocera int id = coor_data[0] & 0x0F; 352ca96ea86SBastien Nocera int input_x = get_unaligned_le16(&coor_data[1]); 353ca96ea86SBastien Nocera int input_y = get_unaligned_le16(&coor_data[3]); 354ca96ea86SBastien Nocera int input_w = get_unaligned_le16(&coor_data[5]); 355ca96ea86SBastien Nocera 356ca96ea86SBastien Nocera input_mt_slot(ts->input_dev, id); 357ca96ea86SBastien Nocera input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 358fafef982SMarcin Niestroj touchscreen_report_pos(ts->input_dev, &ts->prop, 359fafef982SMarcin Niestroj input_x, input_y, true); 360ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 361ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 362ca96ea86SBastien Nocera } 363ca96ea86SBastien Nocera 364bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_9b(struct goodix_ts_data *ts, u8 *coor_data) 365bd3b8480SYauhen Kharuzhy { 366bd3b8480SYauhen Kharuzhy int id = coor_data[1] & 0x0F; 367bd3b8480SYauhen Kharuzhy int input_x = get_unaligned_le16(&coor_data[3]); 368bd3b8480SYauhen Kharuzhy int input_y = get_unaligned_le16(&coor_data[5]); 369bd3b8480SYauhen Kharuzhy int input_w = get_unaligned_le16(&coor_data[7]); 370bd3b8480SYauhen Kharuzhy 371bd3b8480SYauhen Kharuzhy input_mt_slot(ts->input_dev, id); 372bd3b8480SYauhen Kharuzhy input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 373bd3b8480SYauhen Kharuzhy touchscreen_report_pos(ts->input_dev, &ts->prop, 374bd3b8480SYauhen Kharuzhy input_x, input_y, true); 375bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 376bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 377bd3b8480SYauhen Kharuzhy } 378bd3b8480SYauhen Kharuzhy 379ca96ea86SBastien Nocera /** 380ca96ea86SBastien Nocera * goodix_process_events - Process incoming events 381ca96ea86SBastien Nocera * 382ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 383ca96ea86SBastien Nocera * 384ca96ea86SBastien Nocera * Called when the IRQ is triggered. Read the current device state, and push 385ca96ea86SBastien Nocera * the input events to the user space. 386ca96ea86SBastien Nocera */ 387ca96ea86SBastien Nocera static void goodix_process_events(struct goodix_ts_data *ts) 388ca96ea86SBastien Nocera { 389bd3b8480SYauhen Kharuzhy u8 point_data[1 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS]; 390ca96ea86SBastien Nocera int touch_num; 391ca96ea86SBastien Nocera int i; 392ca96ea86SBastien Nocera 393ca96ea86SBastien Nocera touch_num = goodix_ts_read_input_report(ts, point_data); 394ca96ea86SBastien Nocera if (touch_num < 0) 395ca96ea86SBastien Nocera return; 396ca96ea86SBastien Nocera 3974a54feeaSSergei A. Trusov /* 3984a54feeaSSergei A. Trusov * Bit 4 of the first byte reports the status of the capacitive 3994a54feeaSSergei A. Trusov * Windows/Home button. 4004a54feeaSSergei A. Trusov */ 4014a54feeaSSergei A. Trusov input_report_key(ts->input_dev, KEY_LEFTMETA, point_data[0] & BIT(4)); 4024a54feeaSSergei A. Trusov 403ca96ea86SBastien Nocera for (i = 0; i < touch_num; i++) 404bd3b8480SYauhen Kharuzhy if (ts->contact_size == 9) 405bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_9b(ts, 406bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 407bd3b8480SYauhen Kharuzhy else 408bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_8b(ts, 409bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 410ca96ea86SBastien Nocera 411ca96ea86SBastien Nocera input_mt_sync_frame(ts->input_dev); 412ca96ea86SBastien Nocera input_sync(ts->input_dev); 413ca96ea86SBastien Nocera } 414ca96ea86SBastien Nocera 415ca96ea86SBastien Nocera /** 416ca96ea86SBastien Nocera * goodix_ts_irq_handler - The IRQ handler 417ca96ea86SBastien Nocera * 418ca96ea86SBastien Nocera * @irq: interrupt number. 419ca96ea86SBastien Nocera * @dev_id: private data pointer. 420ca96ea86SBastien Nocera */ 421ca96ea86SBastien Nocera static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id) 422ca96ea86SBastien Nocera { 423ca96ea86SBastien Nocera struct goodix_ts_data *ts = dev_id; 424ca96ea86SBastien Nocera 425ca96ea86SBastien Nocera goodix_process_events(ts); 426ca96ea86SBastien Nocera 4275d655b35SIrina Tirdea if (goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0) < 0) 428ca96ea86SBastien Nocera dev_err(&ts->client->dev, "I2C write end_cmd error\n"); 429ca96ea86SBastien Nocera 430ca96ea86SBastien Nocera return IRQ_HANDLED; 431ca96ea86SBastien Nocera } 432ca96ea86SBastien Nocera 4335ab09d6aSIrina Tirdea static void goodix_free_irq(struct goodix_ts_data *ts) 4345ab09d6aSIrina Tirdea { 4355ab09d6aSIrina Tirdea devm_free_irq(&ts->client->dev, ts->client->irq, ts); 4365ab09d6aSIrina Tirdea } 4375ab09d6aSIrina Tirdea 4385ab09d6aSIrina Tirdea static int goodix_request_irq(struct goodix_ts_data *ts) 4395ab09d6aSIrina Tirdea { 4405ab09d6aSIrina Tirdea return devm_request_threaded_irq(&ts->client->dev, ts->client->irq, 4415ab09d6aSIrina Tirdea NULL, goodix_ts_irq_handler, 4425ab09d6aSIrina Tirdea ts->irq_flags, ts->client->name, ts); 4435ab09d6aSIrina Tirdea } 4445ab09d6aSIrina Tirdea 44525309004SMarcin Niestroj static int goodix_check_cfg_8(struct goodix_ts_data *ts, 44668caf858SIrina Tirdea const struct firmware *cfg) 44768caf858SIrina Tirdea { 44825309004SMarcin Niestroj int i, raw_cfg_len = cfg->size - 2; 44968caf858SIrina Tirdea u8 check_sum = 0; 45068caf858SIrina Tirdea 45168caf858SIrina Tirdea for (i = 0; i < raw_cfg_len; i++) 45268caf858SIrina Tirdea check_sum += cfg->data[i]; 45368caf858SIrina Tirdea check_sum = (~check_sum) + 1; 45468caf858SIrina Tirdea if (check_sum != cfg->data[raw_cfg_len]) { 45568caf858SIrina Tirdea dev_err(&ts->client->dev, 45668caf858SIrina Tirdea "The checksum of the config fw is not correct"); 45768caf858SIrina Tirdea return -EINVAL; 45868caf858SIrina Tirdea } 45968caf858SIrina Tirdea 46068caf858SIrina Tirdea if (cfg->data[raw_cfg_len + 1] != 1) { 46168caf858SIrina Tirdea dev_err(&ts->client->dev, 46268caf858SIrina Tirdea "Config fw must have Config_Fresh register set"); 46368caf858SIrina Tirdea return -EINVAL; 46468caf858SIrina Tirdea } 46568caf858SIrina Tirdea 46668caf858SIrina Tirdea return 0; 46768caf858SIrina Tirdea } 46868caf858SIrina Tirdea 469de956caeSHans de Goede static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts) 470de956caeSHans de Goede { 471de956caeSHans de Goede int i, raw_cfg_len = ts->chip->config_len - 2; 472de956caeSHans de Goede u8 check_sum = 0; 473de956caeSHans de Goede 474de956caeSHans de Goede for (i = 0; i < raw_cfg_len; i++) 475de956caeSHans de Goede check_sum += ts->config[i]; 476de956caeSHans de Goede check_sum = (~check_sum) + 1; 477de956caeSHans de Goede 478de956caeSHans de Goede ts->config[raw_cfg_len] = check_sum; 479de956caeSHans de Goede ts->config[raw_cfg_len + 1] = 1; /* Set "config_fresh" bit */ 480de956caeSHans de Goede } 481de956caeSHans de Goede 48225309004SMarcin Niestroj static int goodix_check_cfg_16(struct goodix_ts_data *ts, 48325309004SMarcin Niestroj const struct firmware *cfg) 48425309004SMarcin Niestroj { 48525309004SMarcin Niestroj int i, raw_cfg_len = cfg->size - 3; 48625309004SMarcin Niestroj u16 check_sum = 0; 48725309004SMarcin Niestroj 48825309004SMarcin Niestroj for (i = 0; i < raw_cfg_len; i += 2) 48925309004SMarcin Niestroj check_sum += get_unaligned_be16(&cfg->data[i]); 49025309004SMarcin Niestroj check_sum = (~check_sum) + 1; 49125309004SMarcin Niestroj if (check_sum != get_unaligned_be16(&cfg->data[raw_cfg_len])) { 49225309004SMarcin Niestroj dev_err(&ts->client->dev, 49325309004SMarcin Niestroj "The checksum of the config fw is not correct"); 49425309004SMarcin Niestroj return -EINVAL; 49525309004SMarcin Niestroj } 49625309004SMarcin Niestroj 49725309004SMarcin Niestroj if (cfg->data[raw_cfg_len + 2] != 1) { 49825309004SMarcin Niestroj dev_err(&ts->client->dev, 49925309004SMarcin Niestroj "Config fw must have Config_Fresh register set"); 50025309004SMarcin Niestroj return -EINVAL; 50125309004SMarcin Niestroj } 50225309004SMarcin Niestroj 50325309004SMarcin Niestroj return 0; 50425309004SMarcin Niestroj } 50525309004SMarcin Niestroj 506de956caeSHans de Goede static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts) 507de956caeSHans de Goede { 508de956caeSHans de Goede int i, raw_cfg_len = ts->chip->config_len - 3; 509de956caeSHans de Goede u16 check_sum = 0; 510de956caeSHans de Goede 511de956caeSHans de Goede for (i = 0; i < raw_cfg_len; i += 2) 512de956caeSHans de Goede check_sum += get_unaligned_be16(&ts->config[i]); 513de956caeSHans de Goede check_sum = (~check_sum) + 1; 514de956caeSHans de Goede 515de956caeSHans de Goede put_unaligned_be16(check_sum, &ts->config[raw_cfg_len]); 516de956caeSHans de Goede ts->config[raw_cfg_len + 2] = 1; /* Set "config_fresh" bit */ 517de956caeSHans de Goede } 518de956caeSHans de Goede 51925309004SMarcin Niestroj /** 52025309004SMarcin Niestroj * goodix_check_cfg - Checks if config fw is valid 52125309004SMarcin Niestroj * 52225309004SMarcin Niestroj * @ts: goodix_ts_data pointer 52325309004SMarcin Niestroj * @cfg: firmware config data 52425309004SMarcin Niestroj */ 52525309004SMarcin Niestroj static int goodix_check_cfg(struct goodix_ts_data *ts, 52625309004SMarcin Niestroj const struct firmware *cfg) 52725309004SMarcin Niestroj { 52825309004SMarcin Niestroj if (cfg->size > GOODIX_CONFIG_MAX_LENGTH) { 52925309004SMarcin Niestroj dev_err(&ts->client->dev, 53025309004SMarcin Niestroj "The length of the config fw is not correct"); 53125309004SMarcin Niestroj return -EINVAL; 53225309004SMarcin Niestroj } 53325309004SMarcin Niestroj 53425309004SMarcin Niestroj return ts->chip->check_config(ts, cfg); 53525309004SMarcin Niestroj } 53625309004SMarcin Niestroj 53768caf858SIrina Tirdea /** 53868caf858SIrina Tirdea * goodix_send_cfg - Write fw config to device 53968caf858SIrina Tirdea * 54068caf858SIrina Tirdea * @ts: goodix_ts_data pointer 54168caf858SIrina Tirdea * @cfg: config firmware to write to device 54268caf858SIrina Tirdea */ 54368caf858SIrina Tirdea static int goodix_send_cfg(struct goodix_ts_data *ts, 54468caf858SIrina Tirdea const struct firmware *cfg) 54568caf858SIrina Tirdea { 54668caf858SIrina Tirdea int error; 54768caf858SIrina Tirdea 54868caf858SIrina Tirdea error = goodix_check_cfg(ts, cfg); 54968caf858SIrina Tirdea if (error) 55068caf858SIrina Tirdea return error; 55168caf858SIrina Tirdea 55225309004SMarcin Niestroj error = goodix_i2c_write(ts->client, ts->chip->config_addr, cfg->data, 55368caf858SIrina Tirdea cfg->size); 55468caf858SIrina Tirdea if (error) { 55568caf858SIrina Tirdea dev_err(&ts->client->dev, "Failed to write config data: %d", 55668caf858SIrina Tirdea error); 55768caf858SIrina Tirdea return error; 55868caf858SIrina Tirdea } 55968caf858SIrina Tirdea dev_dbg(&ts->client->dev, "Config sent successfully."); 56068caf858SIrina Tirdea 56168caf858SIrina Tirdea /* Let the firmware reconfigure itself, so sleep for 10ms */ 56268caf858SIrina Tirdea usleep_range(10000, 11000); 56368caf858SIrina Tirdea 56468caf858SIrina Tirdea return 0; 56568caf858SIrina Tirdea } 56668caf858SIrina Tirdea 56749db3997SHans de Goede static int goodix_irq_direction_output(struct goodix_ts_data *ts, 56849db3997SHans de Goede int value) 56949db3997SHans de Goede { 570c5fca485SHans de Goede struct device *dev = &ts->client->dev; 571c5fca485SHans de Goede acpi_status status; 572c5fca485SHans de Goede 57349db3997SHans de Goede switch (ts->irq_pin_access_method) { 57449db3997SHans de Goede case IRQ_PIN_ACCESS_NONE: 57549db3997SHans de Goede dev_err(&ts->client->dev, 57649db3997SHans de Goede "%s called without an irq_pin_access_method set\n", 57749db3997SHans de Goede __func__); 57849db3997SHans de Goede return -EINVAL; 57949db3997SHans de Goede case IRQ_PIN_ACCESS_GPIO: 58049db3997SHans de Goede return gpiod_direction_output(ts->gpiod_int, value); 581a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 582a7d4b171SHans de Goede /* 583a7d4b171SHans de Goede * The IRQ pin triggers on a falling edge, so its gets marked 584a7d4b171SHans de Goede * as active-low, use output_raw to avoid the value inversion. 585a7d4b171SHans de Goede */ 586a7d4b171SHans de Goede return gpiod_direction_output_raw(ts->gpiod_int, value); 587c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 588c5fca485SHans de Goede status = acpi_execute_simple_method(ACPI_HANDLE(dev), 589c5fca485SHans de Goede "INTO", value); 590c5fca485SHans de Goede return ACPI_SUCCESS(status) ? 0 : -EIO; 59149db3997SHans de Goede } 59249db3997SHans de Goede 59349db3997SHans de Goede return -EINVAL; /* Never reached */ 59449db3997SHans de Goede } 59549db3997SHans de Goede 59649db3997SHans de Goede static int goodix_irq_direction_input(struct goodix_ts_data *ts) 59749db3997SHans de Goede { 598c5fca485SHans de Goede struct device *dev = &ts->client->dev; 599c5fca485SHans de Goede acpi_status status; 600c5fca485SHans de Goede 60149db3997SHans de Goede switch (ts->irq_pin_access_method) { 60249db3997SHans de Goede case IRQ_PIN_ACCESS_NONE: 60349db3997SHans de Goede dev_err(&ts->client->dev, 60449db3997SHans de Goede "%s called without an irq_pin_access_method set\n", 60549db3997SHans de Goede __func__); 60649db3997SHans de Goede return -EINVAL; 60749db3997SHans de Goede case IRQ_PIN_ACCESS_GPIO: 608a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 60949db3997SHans de Goede return gpiod_direction_input(ts->gpiod_int); 610c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 611c5fca485SHans de Goede status = acpi_evaluate_object(ACPI_HANDLE(dev), "INTI", 612c5fca485SHans de Goede NULL, NULL); 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 619ec6e1b40SIrina Tirdea static int goodix_int_sync(struct goodix_ts_data *ts) 620ec6e1b40SIrina Tirdea { 621ec6e1b40SIrina Tirdea int error; 622ec6e1b40SIrina Tirdea 62349db3997SHans de Goede error = goodix_irq_direction_output(ts, 0); 624ec6e1b40SIrina Tirdea if (error) 625ec6e1b40SIrina Tirdea return error; 626ec6e1b40SIrina Tirdea 627ec6e1b40SIrina Tirdea msleep(50); /* T5: 50ms */ 628ec6e1b40SIrina Tirdea 62949db3997SHans de Goede error = goodix_irq_direction_input(ts); 630ec6e1b40SIrina Tirdea if (error) 631ec6e1b40SIrina Tirdea return error; 632ec6e1b40SIrina Tirdea 633ec6e1b40SIrina Tirdea return 0; 634ec6e1b40SIrina Tirdea } 635ec6e1b40SIrina Tirdea 636ec6e1b40SIrina Tirdea /** 637ec6e1b40SIrina Tirdea * goodix_reset - Reset device during power on 638ec6e1b40SIrina Tirdea * 639ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 640ec6e1b40SIrina Tirdea */ 641ec6e1b40SIrina Tirdea static int goodix_reset(struct goodix_ts_data *ts) 642ec6e1b40SIrina Tirdea { 643ec6e1b40SIrina Tirdea int error; 644ec6e1b40SIrina Tirdea 645ec6e1b40SIrina Tirdea /* begin select I2C slave addr */ 646ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 0); 647ec6e1b40SIrina Tirdea if (error) 648ec6e1b40SIrina Tirdea return error; 649ec6e1b40SIrina Tirdea 650ec6e1b40SIrina Tirdea msleep(20); /* T2: > 10ms */ 651ec6e1b40SIrina Tirdea 652ec6e1b40SIrina Tirdea /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */ 65349db3997SHans de Goede error = goodix_irq_direction_output(ts, ts->client->addr == 0x14); 654ec6e1b40SIrina Tirdea if (error) 655ec6e1b40SIrina Tirdea return error; 656ec6e1b40SIrina Tirdea 657ec6e1b40SIrina Tirdea usleep_range(100, 2000); /* T3: > 100us */ 658ec6e1b40SIrina Tirdea 659ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 1); 660ec6e1b40SIrina Tirdea if (error) 661ec6e1b40SIrina Tirdea return error; 662ec6e1b40SIrina Tirdea 663ec6e1b40SIrina Tirdea usleep_range(6000, 10000); /* T4: > 5ms */ 664ec6e1b40SIrina Tirdea 665ec6e1b40SIrina Tirdea /* end select I2C slave addr */ 666ec6e1b40SIrina Tirdea error = gpiod_direction_input(ts->gpiod_rst); 667ec6e1b40SIrina Tirdea if (error) 668ec6e1b40SIrina Tirdea return error; 669ec6e1b40SIrina Tirdea 670ec6e1b40SIrina Tirdea error = goodix_int_sync(ts); 671ec6e1b40SIrina Tirdea if (error) 672ec6e1b40SIrina Tirdea return error; 673ec6e1b40SIrina Tirdea 674ec6e1b40SIrina Tirdea return 0; 675ec6e1b40SIrina Tirdea } 676ec6e1b40SIrina Tirdea 677a7d4b171SHans de Goede #if defined CONFIG_X86 && defined CONFIG_ACPI 67867abd9eeSHans de Goede #include <asm/cpu_device_id.h> 67967abd9eeSHans de Goede #include <asm/intel-family.h> 68067abd9eeSHans de Goede 68167abd9eeSHans de Goede static const struct x86_cpu_id baytrail_cpu_ids[] = { 68267abd9eeSHans de Goede { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT, X86_FEATURE_ANY, }, 68367abd9eeSHans de Goede {} 68467abd9eeSHans de Goede }; 68567abd9eeSHans de Goede 68667abd9eeSHans de Goede static inline bool is_byt(void) 68767abd9eeSHans de Goede { 68867abd9eeSHans de Goede const struct x86_cpu_id *id = x86_match_cpu(baytrail_cpu_ids); 68967abd9eeSHans de Goede 69067abd9eeSHans de Goede return !!id; 69167abd9eeSHans de Goede } 69267abd9eeSHans de Goede 693a7d4b171SHans de Goede static const struct acpi_gpio_params first_gpio = { 0, 0, false }; 694a7d4b171SHans de Goede static const struct acpi_gpio_params second_gpio = { 1, 0, false }; 695a7d4b171SHans de Goede 696a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_first_gpios[] = { 697a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &first_gpio, 1 }, 698a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &second_gpio, 1 }, 699a7d4b171SHans de Goede { }, 700a7d4b171SHans de Goede }; 701a7d4b171SHans de Goede 702a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_last_gpios[] = { 703a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 704a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &second_gpio, 1 }, 705a7d4b171SHans de Goede { }, 706a7d4b171SHans de Goede }; 707a7d4b171SHans de Goede 708c5fca485SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_reset_only_gpios[] = { 709c5fca485SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 710c5fca485SHans de Goede { }, 711c5fca485SHans de Goede }; 712c5fca485SHans de Goede 713a7d4b171SHans de Goede static int goodix_resource(struct acpi_resource *ares, void *data) 714a7d4b171SHans de Goede { 715a7d4b171SHans de Goede struct goodix_ts_data *ts = data; 716a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 717a7d4b171SHans de Goede struct acpi_resource_gpio *gpio; 718a7d4b171SHans de Goede 719a7d4b171SHans de Goede switch (ares->type) { 720a7d4b171SHans de Goede case ACPI_RESOURCE_TYPE_GPIO: 721a7d4b171SHans de Goede gpio = &ares->data.gpio; 722a7d4b171SHans de Goede if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { 723a7d4b171SHans de Goede if (ts->gpio_int_idx == -1) { 724a7d4b171SHans de Goede ts->gpio_int_idx = ts->gpio_count; 725a7d4b171SHans de Goede } else { 726a7d4b171SHans de Goede dev_err(dev, "More then one GpioInt resource, ignoring ACPI GPIO resources\n"); 727a7d4b171SHans de Goede ts->gpio_int_idx = -2; 728a7d4b171SHans de Goede } 729a7d4b171SHans de Goede } 730a7d4b171SHans de Goede ts->gpio_count++; 731a7d4b171SHans de Goede break; 732a7d4b171SHans de Goede default: 733a7d4b171SHans de Goede break; 734a7d4b171SHans de Goede } 735a7d4b171SHans de Goede 736a7d4b171SHans de Goede return 0; 737a7d4b171SHans de Goede } 738a7d4b171SHans de Goede 739a7d4b171SHans de Goede /* 740a7d4b171SHans de Goede * This function gets called in case we fail to get the irq GPIO directly 741a7d4b171SHans de Goede * because the ACPI tables lack GPIO-name to APCI _CRS index mappings 742a7d4b171SHans de Goede * (no _DSD UUID daffd814-6eba-4d8c-8a91-bc9bbf4aa301 data). 743a7d4b171SHans de Goede * In that case we add our own mapping and then goodix_get_gpio_config() 744a7d4b171SHans de Goede * retries to get the GPIOs based on the added mapping. 745a7d4b171SHans de Goede */ 746a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 747a7d4b171SHans de Goede { 748a7d4b171SHans de Goede const struct acpi_gpio_mapping *gpio_mapping = NULL; 749a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 750a7d4b171SHans de Goede LIST_HEAD(resources); 751a7d4b171SHans de Goede int ret; 752a7d4b171SHans de Goede 753a7d4b171SHans de Goede ts->gpio_count = 0; 754a7d4b171SHans de Goede ts->gpio_int_idx = -1; 755a7d4b171SHans de Goede ret = acpi_dev_get_resources(ACPI_COMPANION(dev), &resources, 756a7d4b171SHans de Goede goodix_resource, ts); 757a7d4b171SHans de Goede if (ret < 0) { 758a7d4b171SHans de Goede dev_err(dev, "Error getting ACPI resources: %d\n", ret); 759a7d4b171SHans de Goede return ret; 760a7d4b171SHans de Goede } 761a7d4b171SHans de Goede 762a7d4b171SHans de Goede acpi_dev_free_resource_list(&resources); 763a7d4b171SHans de Goede 764a7d4b171SHans de Goede if (ts->gpio_count == 2 && ts->gpio_int_idx == 0) { 765a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 766a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_first_gpios; 767a7d4b171SHans de Goede } else if (ts->gpio_count == 2 && ts->gpio_int_idx == 1) { 768a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 769a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_last_gpios; 770c5fca485SHans de Goede } else if (ts->gpio_count == 1 && ts->gpio_int_idx == -1 && 771c5fca485SHans de Goede acpi_has_method(ACPI_HANDLE(dev), "INTI") && 772c5fca485SHans de Goede acpi_has_method(ACPI_HANDLE(dev), "INTO")) { 773c5fca485SHans de Goede dev_info(dev, "Using ACPI INTI and INTO methods for IRQ pin access\n"); 774c5fca485SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_METHOD; 775c5fca485SHans de Goede gpio_mapping = acpi_goodix_reset_only_gpios; 77667abd9eeSHans de Goede } else if (is_byt() && ts->gpio_count == 2 && ts->gpio_int_idx == -1) { 77767abd9eeSHans de Goede dev_info(dev, "No ACPI GpioInt resource, assuming that the GPIO order is reset, int\n"); 77867abd9eeSHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 77967abd9eeSHans de Goede gpio_mapping = acpi_goodix_int_last_gpios; 780a7d4b171SHans de Goede } else { 781a7d4b171SHans de Goede dev_warn(dev, "Unexpected ACPI resources: gpio_count %d, gpio_int_idx %d\n", 782a7d4b171SHans de Goede ts->gpio_count, ts->gpio_int_idx); 783a7d4b171SHans de Goede return -EINVAL; 784a7d4b171SHans de Goede } 785a7d4b171SHans de Goede 786a7d4b171SHans de Goede return devm_acpi_dev_add_driver_gpios(dev, gpio_mapping); 787a7d4b171SHans de Goede } 788a7d4b171SHans de Goede #else 789a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 790a7d4b171SHans de Goede { 791a7d4b171SHans de Goede return -EINVAL; 792a7d4b171SHans de Goede } 793a7d4b171SHans de Goede #endif /* CONFIG_X86 && CONFIG_ACPI */ 794a7d4b171SHans de Goede 795ec6e1b40SIrina Tirdea /** 796ec6e1b40SIrina Tirdea * goodix_get_gpio_config - Get GPIO config from ACPI/DT 797ec6e1b40SIrina Tirdea * 798ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 799ec6e1b40SIrina Tirdea */ 800ec6e1b40SIrina Tirdea static int goodix_get_gpio_config(struct goodix_ts_data *ts) 801ec6e1b40SIrina Tirdea { 802ec6e1b40SIrina Tirdea int error; 803ec6e1b40SIrina Tirdea struct device *dev; 804ec6e1b40SIrina Tirdea struct gpio_desc *gpiod; 805a7d4b171SHans de Goede bool added_acpi_mappings = false; 806ec6e1b40SIrina Tirdea 807ec6e1b40SIrina Tirdea if (!ts->client) 808ec6e1b40SIrina Tirdea return -EINVAL; 809ec6e1b40SIrina Tirdea dev = &ts->client->dev; 810ec6e1b40SIrina Tirdea 811ae97fb58SJagan Teki ts->avdd28 = devm_regulator_get(dev, "AVDD28"); 812ae97fb58SJagan Teki if (IS_ERR(ts->avdd28)) { 813ae97fb58SJagan Teki error = PTR_ERR(ts->avdd28); 814ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 815ae97fb58SJagan Teki dev_err(dev, 816ae97fb58SJagan Teki "Failed to get AVDD28 regulator: %d\n", error); 817ae97fb58SJagan Teki return error; 818ae97fb58SJagan Teki } 819ae97fb58SJagan Teki 820ae97fb58SJagan Teki ts->vddio = devm_regulator_get(dev, "VDDIO"); 821ae97fb58SJagan Teki if (IS_ERR(ts->vddio)) { 822ae97fb58SJagan Teki error = PTR_ERR(ts->vddio); 823ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 824ae97fb58SJagan Teki dev_err(dev, 825ae97fb58SJagan Teki "Failed to get VDDIO regulator: %d\n", error); 826ae97fb58SJagan Teki return error; 827ae97fb58SJagan Teki } 828ae97fb58SJagan Teki 829a7d4b171SHans de Goede retry_get_irq_gpio: 830ec6e1b40SIrina Tirdea /* Get the interrupt GPIO pin number */ 831ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN); 832ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 833ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 834ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 835ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 836ec6e1b40SIrina Tirdea GOODIX_GPIO_INT_NAME, error); 837ec6e1b40SIrina Tirdea return error; 838ec6e1b40SIrina Tirdea } 839a7d4b171SHans de Goede if (!gpiod && has_acpi_companion(dev) && !added_acpi_mappings) { 840a7d4b171SHans de Goede added_acpi_mappings = true; 841a7d4b171SHans de Goede if (goodix_add_acpi_gpio_mappings(ts) == 0) 842a7d4b171SHans de Goede goto retry_get_irq_gpio; 843a7d4b171SHans de Goede } 844ec6e1b40SIrina Tirdea 845ec6e1b40SIrina Tirdea ts->gpiod_int = gpiod; 846ec6e1b40SIrina Tirdea 847ec6e1b40SIrina Tirdea /* Get the reset line GPIO pin number */ 848ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, GPIOD_IN); 849ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 850ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 851ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 852ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 853ec6e1b40SIrina Tirdea GOODIX_GPIO_RST_NAME, error); 854ec6e1b40SIrina Tirdea return error; 855ec6e1b40SIrina Tirdea } 856ec6e1b40SIrina Tirdea 857ec6e1b40SIrina Tirdea ts->gpiod_rst = gpiod; 858ec6e1b40SIrina Tirdea 859a7d4b171SHans de Goede switch (ts->irq_pin_access_method) { 860a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 861a7d4b171SHans de Goede /* 862a7d4b171SHans de Goede * We end up here if goodix_add_acpi_gpio_mappings() has 863a7d4b171SHans de Goede * called devm_acpi_dev_add_driver_gpios() because the ACPI 864a7d4b171SHans de Goede * tables did not contain name to index mappings. 865a7d4b171SHans de Goede * Check that we successfully got both GPIOs after we've 866a7d4b171SHans de Goede * added our own acpi_gpio_mapping and if we did not get both 867a7d4b171SHans de Goede * GPIOs reset irq_pin_access_method to IRQ_PIN_ACCESS_NONE. 868a7d4b171SHans de Goede */ 869a7d4b171SHans de Goede if (!ts->gpiod_int || !ts->gpiod_rst) 870a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 871a7d4b171SHans de Goede break; 872c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 873c5fca485SHans de Goede if (!ts->gpiod_rst) 874c5fca485SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 875c5fca485SHans de Goede break; 876a7d4b171SHans de Goede default: 877e070a97bSHans de Goede if (ts->gpiod_int && ts->gpiod_rst) { 8781921daceSHans de Goede ts->reset_controller_at_probe = true; 879e070a97bSHans de Goede ts->load_cfg_from_disk = true; 88049db3997SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_GPIO; 881e070a97bSHans de Goede } 882a7d4b171SHans de Goede } 88349db3997SHans de Goede 884ec6e1b40SIrina Tirdea return 0; 885ec6e1b40SIrina Tirdea } 886ec6e1b40SIrina Tirdea 887ca96ea86SBastien Nocera /** 888ca96ea86SBastien Nocera * goodix_read_config - Read the embedded configuration of the panel 889ca96ea86SBastien Nocera * 890ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 891ca96ea86SBastien Nocera * 892ca96ea86SBastien Nocera * Must be called during probe 893ca96ea86SBastien Nocera */ 894ca96ea86SBastien Nocera static void goodix_read_config(struct goodix_ts_data *ts) 895ca96ea86SBastien Nocera { 896fafef982SMarcin Niestroj int x_max, y_max; 897ca96ea86SBastien Nocera int error; 898ca96ea86SBastien Nocera 89925309004SMarcin Niestroj error = goodix_i2c_read(ts->client, ts->chip->config_addr, 900de956caeSHans de Goede ts->config, ts->chip->config_len); 901ca96ea86SBastien Nocera if (error) { 902fafef982SMarcin Niestroj dev_warn(&ts->client->dev, "Error reading config: %d\n", 903ca96ea86SBastien Nocera error); 904ca96ea86SBastien Nocera ts->int_trigger_type = GOODIX_INT_TRIGGER; 905a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 906ca96ea86SBastien Nocera return; 907ca96ea86SBastien Nocera } 908ca96ea86SBastien Nocera 909de956caeSHans de Goede ts->int_trigger_type = ts->config[TRIGGER_LOC] & 0x03; 910de956caeSHans de Goede ts->max_touch_num = ts->config[MAX_CONTACTS_LOC] & 0x0f; 9118b5a359cSBastien Nocera 912de956caeSHans de Goede x_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC]); 913de956caeSHans de Goede y_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC + 2]); 914fafef982SMarcin Niestroj if (x_max && y_max) { 915fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_X, x_max - 1); 916fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_Y, y_max - 1); 917ca96ea86SBastien Nocera } 918de956caeSHans de Goede 919de956caeSHans de Goede ts->chip->calc_config_checksum(ts); 92057c80e8eSKarsten Merker } 921ca96ea86SBastien Nocera 922ca96ea86SBastien Nocera /** 923ca96ea86SBastien Nocera * goodix_read_version - Read goodix touchscreen version 924ca96ea86SBastien Nocera * 92568caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 926ca96ea86SBastien Nocera */ 92768caf858SIrina Tirdea static int goodix_read_version(struct goodix_ts_data *ts) 928ca96ea86SBastien Nocera { 929ca96ea86SBastien Nocera int error; 930ca96ea86SBastien Nocera u8 buf[6]; 931e70b0307SIrina Tirdea char id_str[5]; 932ca96ea86SBastien Nocera 93368caf858SIrina Tirdea error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf)); 934ca96ea86SBastien Nocera if (error) { 93568caf858SIrina Tirdea dev_err(&ts->client->dev, "read version failed: %d\n", error); 936ca96ea86SBastien Nocera return error; 937ca96ea86SBastien Nocera } 938ca96ea86SBastien Nocera 939e70b0307SIrina Tirdea memcpy(id_str, buf, 4); 940e70b0307SIrina Tirdea id_str[4] = 0; 94168caf858SIrina Tirdea if (kstrtou16(id_str, 10, &ts->id)) 94268caf858SIrina Tirdea ts->id = 0x1001; 943e70b0307SIrina Tirdea 94468caf858SIrina Tirdea ts->version = get_unaligned_le16(&buf[4]); 945ca96ea86SBastien Nocera 94668caf858SIrina Tirdea dev_info(&ts->client->dev, "ID %d, version: %04x\n", ts->id, 94768caf858SIrina Tirdea ts->version); 948ca96ea86SBastien Nocera 949ca96ea86SBastien Nocera return 0; 950ca96ea86SBastien Nocera } 951ca96ea86SBastien Nocera 952ca96ea86SBastien Nocera /** 953ca96ea86SBastien Nocera * goodix_i2c_test - I2C test function to check if the device answers. 954ca96ea86SBastien Nocera * 955ca96ea86SBastien Nocera * @client: the i2c client 956ca96ea86SBastien Nocera */ 957ca96ea86SBastien Nocera static int goodix_i2c_test(struct i2c_client *client) 958ca96ea86SBastien Nocera { 959ca96ea86SBastien Nocera int retry = 0; 960ca96ea86SBastien Nocera int error; 961ca96ea86SBastien Nocera u8 test; 962ca96ea86SBastien Nocera 963ca96ea86SBastien Nocera while (retry++ < 2) { 96425309004SMarcin Niestroj error = goodix_i2c_read(client, GOODIX_REG_ID, 965ca96ea86SBastien Nocera &test, 1); 966ca96ea86SBastien Nocera if (!error) 967ca96ea86SBastien Nocera return 0; 968ca96ea86SBastien Nocera 969ca96ea86SBastien Nocera dev_err(&client->dev, "i2c test failed attempt %d: %d\n", 970ca96ea86SBastien Nocera retry, error); 971ca96ea86SBastien Nocera msleep(20); 972ca96ea86SBastien Nocera } 973ca96ea86SBastien Nocera 974ca96ea86SBastien Nocera return error; 975ca96ea86SBastien Nocera } 976ca96ea86SBastien Nocera 977ca96ea86SBastien Nocera /** 97868caf858SIrina Tirdea * goodix_configure_dev - Finish device initialization 97968caf858SIrina Tirdea * 98068caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 98168caf858SIrina Tirdea * 98268caf858SIrina Tirdea * Must be called from probe to finish initialization of the device. 98368caf858SIrina Tirdea * Contains the common initialization code for both devices that 98468caf858SIrina Tirdea * declare gpio pins and devices that do not. It is either called 98568caf858SIrina Tirdea * directly from probe or from request_firmware_wait callback. 98668caf858SIrina Tirdea */ 98768caf858SIrina Tirdea static int goodix_configure_dev(struct goodix_ts_data *ts) 98868caf858SIrina Tirdea { 98968caf858SIrina Tirdea int error; 99068caf858SIrina Tirdea 991fafef982SMarcin Niestroj ts->int_trigger_type = GOODIX_INT_TRIGGER; 992fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 993ad48cf5eSKarsten Merker 994fafef982SMarcin Niestroj ts->input_dev = devm_input_allocate_device(&ts->client->dev); 995fafef982SMarcin Niestroj if (!ts->input_dev) { 996fafef982SMarcin Niestroj dev_err(&ts->client->dev, "Failed to allocate input device."); 997fafef982SMarcin Niestroj return -ENOMEM; 998fafef982SMarcin Niestroj } 999fafef982SMarcin Niestroj 1000fafef982SMarcin Niestroj ts->input_dev->name = "Goodix Capacitive TouchScreen"; 1001fafef982SMarcin Niestroj ts->input_dev->phys = "input/ts"; 1002fafef982SMarcin Niestroj ts->input_dev->id.bustype = BUS_I2C; 1003fafef982SMarcin Niestroj ts->input_dev->id.vendor = 0x0416; 1004fafef982SMarcin Niestroj ts->input_dev->id.product = ts->id; 1005fafef982SMarcin Niestroj ts->input_dev->id.version = ts->version; 1006fafef982SMarcin Niestroj 1007fafef982SMarcin Niestroj /* Capacitive Windows/Home button on some devices */ 1008fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_KEY, KEY_LEFTMETA); 1009fafef982SMarcin Niestroj 1010fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X); 1011fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y); 1012fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 1013fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 1014fafef982SMarcin Niestroj 1015fafef982SMarcin Niestroj /* Read configuration and apply touchscreen parameters */ 101668caf858SIrina Tirdea goodix_read_config(ts); 101768caf858SIrina Tirdea 1018fafef982SMarcin Niestroj /* Try overriding touchscreen parameters via device properties */ 1019fafef982SMarcin Niestroj touchscreen_parse_properties(ts->input_dev, true, &ts->prop); 1020fafef982SMarcin Niestroj 1021fafef982SMarcin Niestroj if (!ts->prop.max_x || !ts->prop.max_y || !ts->max_touch_num) { 1022c1c00aa5SGuido Günther dev_err(&ts->client->dev, 1023c1c00aa5SGuido Günther "Invalid config (%d, %d, %d), using defaults\n", 1024c1c00aa5SGuido Günther ts->prop.max_x, ts->prop.max_y, ts->max_touch_num); 1025fafef982SMarcin Niestroj ts->prop.max_x = GOODIX_MAX_WIDTH - 1; 1026fafef982SMarcin Niestroj ts->prop.max_y = GOODIX_MAX_HEIGHT - 1; 1027fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 1028fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 1029fafef982SMarcin Niestroj ABS_MT_POSITION_X, ts->prop.max_x); 1030fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 1031fafef982SMarcin Niestroj ABS_MT_POSITION_Y, ts->prop.max_y); 1032fafef982SMarcin Niestroj } 1033fafef982SMarcin Niestroj 1034fafef982SMarcin Niestroj if (dmi_check_system(rotated_screen)) { 1035fafef982SMarcin Niestroj ts->prop.invert_x = true; 1036fafef982SMarcin Niestroj ts->prop.invert_y = true; 1037fafef982SMarcin Niestroj dev_dbg(&ts->client->dev, 1038fafef982SMarcin Niestroj "Applying '180 degrees rotated screen' quirk\n"); 1039fafef982SMarcin Niestroj } 1040fafef982SMarcin Niestroj 1041bd3b8480SYauhen Kharuzhy if (dmi_check_system(nine_bytes_report)) { 1042bd3b8480SYauhen Kharuzhy ts->contact_size = 9; 1043bd3b8480SYauhen Kharuzhy 1044bd3b8480SYauhen Kharuzhy dev_dbg(&ts->client->dev, 1045bd3b8480SYauhen Kharuzhy "Non-standard 9-bytes report format quirk\n"); 1046bd3b8480SYauhen Kharuzhy } 1047bd3b8480SYauhen Kharuzhy 10481dd5ddc1SSergei A. Trusov if (dmi_check_system(inverted_x_screen)) { 10491dd5ddc1SSergei A. Trusov ts->prop.invert_x = true; 10501dd5ddc1SSergei A. Trusov dev_dbg(&ts->client->dev, 10511dd5ddc1SSergei A. Trusov "Applying 'inverted x screen' quirk\n"); 10521dd5ddc1SSergei A. Trusov } 10531dd5ddc1SSergei A. Trusov 1054fafef982SMarcin Niestroj error = input_mt_init_slots(ts->input_dev, ts->max_touch_num, 1055fafef982SMarcin Niestroj INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); 1056fafef982SMarcin Niestroj if (error) { 1057fafef982SMarcin Niestroj dev_err(&ts->client->dev, 1058fafef982SMarcin Niestroj "Failed to initialize MT slots: %d", error); 105968caf858SIrina Tirdea return error; 1060fafef982SMarcin Niestroj } 1061fafef982SMarcin Niestroj 1062fafef982SMarcin Niestroj error = input_register_device(ts->input_dev); 1063fafef982SMarcin Niestroj if (error) { 1064fafef982SMarcin Niestroj dev_err(&ts->client->dev, 1065fafef982SMarcin Niestroj "Failed to register input device: %d", error); 1066fafef982SMarcin Niestroj return error; 1067fafef982SMarcin Niestroj } 106868caf858SIrina Tirdea 10695ab09d6aSIrina Tirdea ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT; 10705ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 107168caf858SIrina Tirdea if (error) { 107268caf858SIrina Tirdea dev_err(&ts->client->dev, "request IRQ failed: %d\n", error); 107368caf858SIrina Tirdea return error; 107468caf858SIrina Tirdea } 107568caf858SIrina Tirdea 107668caf858SIrina Tirdea return 0; 107768caf858SIrina Tirdea } 107868caf858SIrina Tirdea 107968caf858SIrina Tirdea /** 108068caf858SIrina Tirdea * goodix_config_cb - Callback to finish device init 108168caf858SIrina Tirdea * 108268caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 108368caf858SIrina Tirdea * 108468caf858SIrina Tirdea * request_firmware_wait callback that finishes 108568caf858SIrina Tirdea * initialization of the device. 108668caf858SIrina Tirdea */ 108768caf858SIrina Tirdea static void goodix_config_cb(const struct firmware *cfg, void *ctx) 108868caf858SIrina Tirdea { 108968caf858SIrina Tirdea struct goodix_ts_data *ts = ctx; 109068caf858SIrina Tirdea int error; 109168caf858SIrina Tirdea 109268caf858SIrina Tirdea if (cfg) { 109368caf858SIrina Tirdea /* send device configuration to the firmware */ 109468caf858SIrina Tirdea error = goodix_send_cfg(ts, cfg); 109568caf858SIrina Tirdea if (error) 109668caf858SIrina Tirdea goto err_release_cfg; 109768caf858SIrina Tirdea } 109868caf858SIrina Tirdea 109968caf858SIrina Tirdea goodix_configure_dev(ts); 110068caf858SIrina Tirdea 110168caf858SIrina Tirdea err_release_cfg: 110268caf858SIrina Tirdea release_firmware(cfg); 110368caf858SIrina Tirdea complete_all(&ts->firmware_loading_complete); 110468caf858SIrina Tirdea } 110568caf858SIrina Tirdea 1106ae97fb58SJagan Teki static void goodix_disable_regulators(void *arg) 1107ae97fb58SJagan Teki { 1108ae97fb58SJagan Teki struct goodix_ts_data *ts = arg; 1109ae97fb58SJagan Teki 1110ae97fb58SJagan Teki regulator_disable(ts->vddio); 1111ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1112ae97fb58SJagan Teki } 1113ae97fb58SJagan Teki 1114ca96ea86SBastien Nocera static int goodix_ts_probe(struct i2c_client *client, 1115ca96ea86SBastien Nocera const struct i2c_device_id *id) 1116ca96ea86SBastien Nocera { 1117ca96ea86SBastien Nocera struct goodix_ts_data *ts; 1118ca96ea86SBastien Nocera int error; 1119ca96ea86SBastien Nocera 1120ca96ea86SBastien Nocera dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr); 1121ca96ea86SBastien Nocera 1122ca96ea86SBastien Nocera if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 1123ca96ea86SBastien Nocera dev_err(&client->dev, "I2C check functionality failed.\n"); 1124ca96ea86SBastien Nocera return -ENXIO; 1125ca96ea86SBastien Nocera } 1126ca96ea86SBastien Nocera 1127ca96ea86SBastien Nocera ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); 1128ca96ea86SBastien Nocera if (!ts) 1129ca96ea86SBastien Nocera return -ENOMEM; 1130ca96ea86SBastien Nocera 1131ca96ea86SBastien Nocera ts->client = client; 1132ca96ea86SBastien Nocera i2c_set_clientdata(client, ts); 113368caf858SIrina Tirdea init_completion(&ts->firmware_loading_complete); 1134bd3b8480SYauhen Kharuzhy ts->contact_size = GOODIX_CONTACT_SIZE; 1135ca96ea86SBastien Nocera 1136ec6e1b40SIrina Tirdea error = goodix_get_gpio_config(ts); 1137ec6e1b40SIrina Tirdea if (error) 1138ec6e1b40SIrina Tirdea return error; 1139ec6e1b40SIrina Tirdea 1140ae97fb58SJagan Teki /* power up the controller */ 1141ae97fb58SJagan Teki error = regulator_enable(ts->avdd28); 1142ae97fb58SJagan Teki if (error) { 1143ae97fb58SJagan Teki dev_err(&client->dev, 1144ae97fb58SJagan Teki "Failed to enable AVDD28 regulator: %d\n", 1145ae97fb58SJagan Teki error); 1146ae97fb58SJagan Teki return error; 1147ae97fb58SJagan Teki } 1148ae97fb58SJagan Teki 1149ae97fb58SJagan Teki error = regulator_enable(ts->vddio); 1150ae97fb58SJagan Teki if (error) { 1151ae97fb58SJagan Teki dev_err(&client->dev, 1152ae97fb58SJagan Teki "Failed to enable VDDIO regulator: %d\n", 1153ae97fb58SJagan Teki error); 1154ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1155ae97fb58SJagan Teki return error; 1156ae97fb58SJagan Teki } 1157ae97fb58SJagan Teki 1158ae97fb58SJagan Teki error = devm_add_action_or_reset(&client->dev, 1159ae97fb58SJagan Teki goodix_disable_regulators, ts); 1160ae97fb58SJagan Teki if (error) 1161ae97fb58SJagan Teki return error; 1162ae97fb58SJagan Teki 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) { 1174ca96ea86SBastien Nocera dev_err(&client->dev, "I2C communication failure: %d\n", error); 1175ca96ea86SBastien Nocera return error; 1176ca96ea86SBastien Nocera } 1177ca96ea86SBastien Nocera 117868caf858SIrina Tirdea error = goodix_read_version(ts); 1179ca96ea86SBastien Nocera if (error) { 1180ca96ea86SBastien Nocera dev_err(&client->dev, "Read version failed.\n"); 1181ca96ea86SBastien Nocera return error; 1182ca96ea86SBastien Nocera } 1183ca96ea86SBastien Nocera 118425309004SMarcin Niestroj ts->chip = goodix_get_chip_data(ts->id); 1185a779fbc6SIrina Tirdea 1186e070a97bSHans de Goede if (ts->load_cfg_from_disk) { 118768caf858SIrina Tirdea /* update device config */ 118868caf858SIrina Tirdea ts->cfg_name = devm_kasprintf(&client->dev, GFP_KERNEL, 118968caf858SIrina Tirdea "goodix_%d_cfg.bin", ts->id); 119068caf858SIrina Tirdea if (!ts->cfg_name) 119168caf858SIrina Tirdea return -ENOMEM; 1192ca96ea86SBastien Nocera 119368caf858SIrina Tirdea error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name, 119468caf858SIrina Tirdea &client->dev, GFP_KERNEL, ts, 119568caf858SIrina Tirdea goodix_config_cb); 1196ca96ea86SBastien Nocera if (error) { 119768caf858SIrina Tirdea dev_err(&client->dev, 119868caf858SIrina Tirdea "Failed to invoke firmware loader: %d\n", 119968caf858SIrina Tirdea error); 1200ca96ea86SBastien Nocera return error; 1201ca96ea86SBastien Nocera } 1202ca96ea86SBastien Nocera 1203ca96ea86SBastien Nocera return 0; 120468caf858SIrina Tirdea } else { 120568caf858SIrina Tirdea error = goodix_configure_dev(ts); 120668caf858SIrina Tirdea if (error) 120768caf858SIrina Tirdea return error; 120868caf858SIrina Tirdea } 120968caf858SIrina Tirdea 121068caf858SIrina Tirdea return 0; 121168caf858SIrina Tirdea } 121268caf858SIrina Tirdea 121368caf858SIrina Tirdea static int goodix_ts_remove(struct i2c_client *client) 121468caf858SIrina Tirdea { 121568caf858SIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 121668caf858SIrina Tirdea 1217e070a97bSHans de Goede if (ts->load_cfg_from_disk) 121868caf858SIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 121968caf858SIrina Tirdea 122068caf858SIrina Tirdea return 0; 1221ca96ea86SBastien Nocera } 1222ca96ea86SBastien Nocera 12235ab09d6aSIrina Tirdea static int __maybe_unused goodix_suspend(struct device *dev) 12245ab09d6aSIrina Tirdea { 12255ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 12265ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 12275ab09d6aSIrina Tirdea int error; 12285ab09d6aSIrina Tirdea 1229e070a97bSHans de Goede if (ts->load_cfg_from_disk) 1230e070a97bSHans de Goede wait_for_completion(&ts->firmware_loading_complete); 1231e070a97bSHans de Goede 12325ab09d6aSIrina Tirdea /* We need gpio pins to suspend/resume */ 123349db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1234faec44b6SHans de Goede disable_irq(client->irq); 12355ab09d6aSIrina Tirdea return 0; 1236faec44b6SHans de Goede } 12375ab09d6aSIrina Tirdea 12385ab09d6aSIrina Tirdea /* Free IRQ as IRQ pin is used as output in the suspend sequence */ 12395ab09d6aSIrina Tirdea goodix_free_irq(ts); 12405ab09d6aSIrina Tirdea 12415ab09d6aSIrina Tirdea /* Output LOW on the INT pin for 5 ms */ 124249db3997SHans de Goede error = goodix_irq_direction_output(ts, 0); 12435ab09d6aSIrina Tirdea if (error) { 12445ab09d6aSIrina Tirdea goodix_request_irq(ts); 12455ab09d6aSIrina Tirdea return error; 12465ab09d6aSIrina Tirdea } 12475ab09d6aSIrina Tirdea 12485ab09d6aSIrina Tirdea usleep_range(5000, 6000); 12495ab09d6aSIrina Tirdea 12505ab09d6aSIrina Tirdea error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND, 12515ab09d6aSIrina Tirdea GOODIX_CMD_SCREEN_OFF); 12525ab09d6aSIrina Tirdea if (error) { 12535ab09d6aSIrina Tirdea dev_err(&ts->client->dev, "Screen off command failed\n"); 125449db3997SHans de Goede goodix_irq_direction_input(ts); 12555ab09d6aSIrina Tirdea goodix_request_irq(ts); 12565ab09d6aSIrina Tirdea return -EAGAIN; 12575ab09d6aSIrina Tirdea } 12585ab09d6aSIrina Tirdea 12595ab09d6aSIrina Tirdea /* 12605ab09d6aSIrina Tirdea * The datasheet specifies that the interval between sending screen-off 12615ab09d6aSIrina Tirdea * command and wake-up should be longer than 58 ms. To avoid waking up 12625ab09d6aSIrina Tirdea * sooner, delay 58ms here. 12635ab09d6aSIrina Tirdea */ 12645ab09d6aSIrina Tirdea msleep(58); 12655ab09d6aSIrina Tirdea return 0; 12665ab09d6aSIrina Tirdea } 12675ab09d6aSIrina Tirdea 12685ab09d6aSIrina Tirdea static int __maybe_unused goodix_resume(struct device *dev) 12695ab09d6aSIrina Tirdea { 12705ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 12715ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 12725ab09d6aSIrina Tirdea int error; 12735ab09d6aSIrina Tirdea 127449db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1275faec44b6SHans de Goede enable_irq(client->irq); 12765ab09d6aSIrina Tirdea return 0; 1277faec44b6SHans de Goede } 12785ab09d6aSIrina Tirdea 12795ab09d6aSIrina Tirdea /* 12805ab09d6aSIrina Tirdea * Exit sleep mode by outputting HIGH level to INT pin 12815ab09d6aSIrina Tirdea * for 2ms~5ms. 12825ab09d6aSIrina Tirdea */ 128349db3997SHans de Goede error = goodix_irq_direction_output(ts, 1); 12845ab09d6aSIrina Tirdea if (error) 12855ab09d6aSIrina Tirdea return error; 12865ab09d6aSIrina Tirdea 12875ab09d6aSIrina Tirdea usleep_range(2000, 5000); 12885ab09d6aSIrina Tirdea 12895ab09d6aSIrina Tirdea error = goodix_int_sync(ts); 12905ab09d6aSIrina Tirdea if (error) 12915ab09d6aSIrina Tirdea return error; 12925ab09d6aSIrina Tirdea 12935ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 12945ab09d6aSIrina Tirdea if (error) 12955ab09d6aSIrina Tirdea return error; 12965ab09d6aSIrina Tirdea 12975ab09d6aSIrina Tirdea return 0; 12985ab09d6aSIrina Tirdea } 12995ab09d6aSIrina Tirdea 13005ab09d6aSIrina Tirdea static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume); 13015ab09d6aSIrina Tirdea 1302ca96ea86SBastien Nocera static const struct i2c_device_id goodix_ts_id[] = { 1303ca96ea86SBastien Nocera { "GDIX1001:00", 0 }, 1304ca96ea86SBastien Nocera { } 1305ca96ea86SBastien Nocera }; 13062e9e910eSJavier Martinez Canillas MODULE_DEVICE_TABLE(i2c, goodix_ts_id); 1307ca96ea86SBastien Nocera 1308771d8f1bSAleksei Mamlin #ifdef CONFIG_ACPI 1309ca96ea86SBastien Nocera static const struct acpi_device_id goodix_acpi_match[] = { 1310ca96ea86SBastien Nocera { "GDIX1001", 0 }, 13115ca4d1aeSEthan Lee { "GDIX1002", 0 }, 1312ca96ea86SBastien Nocera { } 1313ca96ea86SBastien Nocera }; 1314ca96ea86SBastien Nocera MODULE_DEVICE_TABLE(acpi, goodix_acpi_match); 1315771d8f1bSAleksei Mamlin #endif 1316771d8f1bSAleksei Mamlin 1317771d8f1bSAleksei Mamlin #ifdef CONFIG_OF 1318771d8f1bSAleksei Mamlin static const struct of_device_id goodix_of_match[] = { 131925309004SMarcin Niestroj { .compatible = "goodix,gt1151" }, 1320a5f50c50SJagan Teki { .compatible = "goodix,gt5663" }, 132184ef1b33SGuido Günther { .compatible = "goodix,gt5688" }, 1322771d8f1bSAleksei Mamlin { .compatible = "goodix,gt911" }, 1323771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9110" }, 1324771d8f1bSAleksei Mamlin { .compatible = "goodix,gt912" }, 1325771d8f1bSAleksei Mamlin { .compatible = "goodix,gt927" }, 1326771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9271" }, 1327771d8f1bSAleksei Mamlin { .compatible = "goodix,gt928" }, 1328771d8f1bSAleksei Mamlin { .compatible = "goodix,gt967" }, 1329771d8f1bSAleksei Mamlin { } 1330771d8f1bSAleksei Mamlin }; 1331771d8f1bSAleksei Mamlin MODULE_DEVICE_TABLE(of, goodix_of_match); 1332771d8f1bSAleksei Mamlin #endif 1333ca96ea86SBastien Nocera 1334ca96ea86SBastien Nocera static struct i2c_driver goodix_ts_driver = { 1335ca96ea86SBastien Nocera .probe = goodix_ts_probe, 133668caf858SIrina Tirdea .remove = goodix_ts_remove, 1337ca96ea86SBastien Nocera .id_table = goodix_ts_id, 1338ca96ea86SBastien Nocera .driver = { 1339ca96ea86SBastien Nocera .name = "Goodix-TS", 1340771d8f1bSAleksei Mamlin .acpi_match_table = ACPI_PTR(goodix_acpi_match), 1341771d8f1bSAleksei Mamlin .of_match_table = of_match_ptr(goodix_of_match), 13425ab09d6aSIrina Tirdea .pm = &goodix_pm_ops, 1343ca96ea86SBastien Nocera }, 1344ca96ea86SBastien Nocera }; 1345ca96ea86SBastien Nocera module_i2c_driver(goodix_ts_driver); 1346ca96ea86SBastien Nocera 1347ca96ea86SBastien Nocera MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); 1348ca96ea86SBastien Nocera MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>"); 1349ca96ea86SBastien Nocera MODULE_DESCRIPTION("Goodix touchscreen driver"); 1350ca96ea86SBastien Nocera MODULE_LICENSE("GPL v2"); 1351