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 3225309004SMarcin Niestroj struct goodix_ts_data; 3325309004SMarcin Niestroj 3425309004SMarcin Niestroj struct goodix_chip_data { 3525309004SMarcin Niestroj u16 config_addr; 3625309004SMarcin Niestroj int config_len; 3725309004SMarcin Niestroj int (*check_config)(struct goodix_ts_data *, const struct firmware *); 3825309004SMarcin Niestroj }; 3925309004SMarcin Niestroj 40ca96ea86SBastien Nocera struct goodix_ts_data { 41ca96ea86SBastien Nocera struct i2c_client *client; 42ca96ea86SBastien Nocera struct input_dev *input_dev; 4325309004SMarcin Niestroj const struct goodix_chip_data *chip; 44fafef982SMarcin Niestroj struct touchscreen_properties prop; 45ca96ea86SBastien Nocera unsigned int max_touch_num; 46ca96ea86SBastien Nocera unsigned int int_trigger_type; 47ae97fb58SJagan Teki struct regulator *avdd28; 48ae97fb58SJagan Teki struct regulator *vddio; 49ec6e1b40SIrina Tirdea struct gpio_desc *gpiod_int; 50ec6e1b40SIrina Tirdea struct gpio_desc *gpiod_rst; 5168caf858SIrina Tirdea u16 id; 5268caf858SIrina Tirdea u16 version; 5368caf858SIrina Tirdea const char *cfg_name; 5468caf858SIrina Tirdea struct completion firmware_loading_complete; 555ab09d6aSIrina Tirdea unsigned long irq_flags; 56bd3b8480SYauhen Kharuzhy unsigned int contact_size; 57ca96ea86SBastien Nocera }; 58ca96ea86SBastien Nocera 59ec6e1b40SIrina Tirdea #define GOODIX_GPIO_INT_NAME "irq" 60ec6e1b40SIrina Tirdea #define GOODIX_GPIO_RST_NAME "reset" 61ec6e1b40SIrina Tirdea 62ca96ea86SBastien Nocera #define GOODIX_MAX_HEIGHT 4096 63ca96ea86SBastien Nocera #define GOODIX_MAX_WIDTH 4096 64ca96ea86SBastien Nocera #define GOODIX_INT_TRIGGER 1 65ca96ea86SBastien Nocera #define GOODIX_CONTACT_SIZE 8 66bd3b8480SYauhen Kharuzhy #define GOODIX_MAX_CONTACT_SIZE 9 67ca96ea86SBastien Nocera #define GOODIX_MAX_CONTACTS 10 68ca96ea86SBastien Nocera 69ca96ea86SBastien Nocera #define GOODIX_CONFIG_MAX_LENGTH 240 70a779fbc6SIrina Tirdea #define GOODIX_CONFIG_911_LENGTH 186 71a779fbc6SIrina Tirdea #define GOODIX_CONFIG_967_LENGTH 228 72ca96ea86SBastien Nocera 73ca96ea86SBastien Nocera /* Register defines */ 745ab09d6aSIrina Tirdea #define GOODIX_REG_COMMAND 0x8040 755ab09d6aSIrina Tirdea #define GOODIX_CMD_SCREEN_OFF 0x05 765ab09d6aSIrina Tirdea 77ca96ea86SBastien Nocera #define GOODIX_READ_COOR_ADDR 0x814E 7825309004SMarcin Niestroj #define GOODIX_GT1X_REG_CONFIG_DATA 0x8050 7925309004SMarcin Niestroj #define GOODIX_GT9X_REG_CONFIG_DATA 0x8047 80e70b0307SIrina Tirdea #define GOODIX_REG_ID 0x8140 81ca96ea86SBastien Nocera 829b5db7aaSPaul Cercueil #define GOODIX_BUFFER_STATUS_READY BIT(7) 839b5db7aaSPaul Cercueil #define GOODIX_BUFFER_STATUS_TIMEOUT 20 849b5db7aaSPaul Cercueil 85ca96ea86SBastien Nocera #define RESOLUTION_LOC 1 86a7ac7c95SAleksei Mamlin #define MAX_CONTACTS_LOC 5 87ca96ea86SBastien Nocera #define TRIGGER_LOC 6 88ca96ea86SBastien Nocera 8925309004SMarcin Niestroj static int goodix_check_cfg_8(struct goodix_ts_data *ts, 9025309004SMarcin Niestroj const struct firmware *cfg); 9125309004SMarcin Niestroj static int goodix_check_cfg_16(struct goodix_ts_data *ts, 9225309004SMarcin Niestroj const struct firmware *cfg); 9325309004SMarcin Niestroj 9425309004SMarcin Niestroj static const struct goodix_chip_data gt1x_chip_data = { 9525309004SMarcin Niestroj .config_addr = GOODIX_GT1X_REG_CONFIG_DATA, 9625309004SMarcin Niestroj .config_len = GOODIX_CONFIG_MAX_LENGTH, 9725309004SMarcin Niestroj .check_config = goodix_check_cfg_16, 9825309004SMarcin Niestroj }; 9925309004SMarcin Niestroj 10025309004SMarcin Niestroj static const struct goodix_chip_data gt911_chip_data = { 10125309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 10225309004SMarcin Niestroj .config_len = GOODIX_CONFIG_911_LENGTH, 10325309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 10425309004SMarcin Niestroj }; 10525309004SMarcin Niestroj 10625309004SMarcin Niestroj static const struct goodix_chip_data gt967_chip_data = { 10725309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 10825309004SMarcin Niestroj .config_len = GOODIX_CONFIG_967_LENGTH, 10925309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 11025309004SMarcin Niestroj }; 11125309004SMarcin Niestroj 11225309004SMarcin Niestroj static const struct goodix_chip_data gt9x_chip_data = { 11325309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 11425309004SMarcin Niestroj .config_len = GOODIX_CONFIG_MAX_LENGTH, 11525309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 11625309004SMarcin Niestroj }; 11725309004SMarcin Niestroj 118ca96ea86SBastien Nocera static const unsigned long goodix_irq_flags[] = { 119ca96ea86SBastien Nocera IRQ_TYPE_EDGE_RISING, 120ca96ea86SBastien Nocera IRQ_TYPE_EDGE_FALLING, 121ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_LOW, 122ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_HIGH, 123ca96ea86SBastien Nocera }; 124ca96ea86SBastien Nocera 1258b5a359cSBastien Nocera /* 1268b5a359cSBastien Nocera * Those tablets have their coordinates origin at the bottom right 1278b5a359cSBastien Nocera * of the tablet, as if rotated 180 degrees 1288b5a359cSBastien Nocera */ 1298b5a359cSBastien Nocera static const struct dmi_system_id rotated_screen[] = { 1308b5a359cSBastien Nocera #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1318b5a359cSBastien Nocera { 132df5b5e55SHans de Goede .ident = "Teclast X89", 133df5b5e55SHans de Goede .matches = { 134df5b5e55SHans de Goede /* tPAD is too generic, also match on bios date */ 135df5b5e55SHans de Goede DMI_MATCH(DMI_BOARD_VENDOR, "TECLAST"), 136df5b5e55SHans de Goede DMI_MATCH(DMI_BOARD_NAME, "tPAD"), 137df5b5e55SHans de Goede DMI_MATCH(DMI_BIOS_DATE, "12/19/2014"), 138df5b5e55SHans de Goede }, 139df5b5e55SHans de Goede }, 140df5b5e55SHans de Goede { 1418b5a359cSBastien Nocera .ident = "WinBook TW100", 1428b5a359cSBastien Nocera .matches = { 1438b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 1448b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW100") 1458b5a359cSBastien Nocera } 1468b5a359cSBastien Nocera }, 1478b5a359cSBastien Nocera { 1488b5a359cSBastien Nocera .ident = "WinBook TW700", 1498b5a359cSBastien Nocera .matches = { 1508b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 1518b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW700") 1528b5a359cSBastien Nocera }, 1538b5a359cSBastien Nocera }, 1548b5a359cSBastien Nocera #endif 1558b5a359cSBastien Nocera {} 1568b5a359cSBastien Nocera }; 1578b5a359cSBastien Nocera 158bd3b8480SYauhen Kharuzhy static const struct dmi_system_id nine_bytes_report[] = { 159bd3b8480SYauhen Kharuzhy #if defined(CONFIG_DMI) && defined(CONFIG_X86) 160bd3b8480SYauhen Kharuzhy { 161bd3b8480SYauhen Kharuzhy .ident = "Lenovo YogaBook", 162bd3b8480SYauhen Kharuzhy /* YB1-X91L/F and YB1-X90L/F */ 163bd3b8480SYauhen Kharuzhy .matches = { 164bd3b8480SYauhen Kharuzhy DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X9") 165bd3b8480SYauhen Kharuzhy } 166bd3b8480SYauhen Kharuzhy }, 167bd3b8480SYauhen Kharuzhy #endif 168bd3b8480SYauhen Kharuzhy {} 169bd3b8480SYauhen Kharuzhy }; 170bd3b8480SYauhen Kharuzhy 1711dd5ddc1SSergei A. Trusov /* 1721dd5ddc1SSergei A. Trusov * Those tablets have their x coordinate inverted 1731dd5ddc1SSergei A. Trusov */ 1741dd5ddc1SSergei A. Trusov static const struct dmi_system_id inverted_x_screen[] = { 1751dd5ddc1SSergei A. Trusov #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1761dd5ddc1SSergei A. Trusov { 1771dd5ddc1SSergei A. Trusov .ident = "Cube I15-TC", 1781dd5ddc1SSergei A. Trusov .matches = { 1791dd5ddc1SSergei A. Trusov DMI_MATCH(DMI_SYS_VENDOR, "Cube"), 1801dd5ddc1SSergei A. Trusov DMI_MATCH(DMI_PRODUCT_NAME, "I15-TC") 1811dd5ddc1SSergei A. Trusov }, 1821dd5ddc1SSergei A. Trusov }, 1831dd5ddc1SSergei A. Trusov #endif 1841dd5ddc1SSergei A. Trusov {} 1851dd5ddc1SSergei A. Trusov }; 1861dd5ddc1SSergei A. Trusov 187ca96ea86SBastien Nocera /** 188ca96ea86SBastien Nocera * goodix_i2c_read - read data from a register of the i2c slave device. 189ca96ea86SBastien Nocera * 190ca96ea86SBastien Nocera * @client: i2c device. 191ca96ea86SBastien Nocera * @reg: the register to read from. 192ca96ea86SBastien Nocera * @buf: raw write data buffer. 193ca96ea86SBastien Nocera * @len: length of the buffer to write 194ca96ea86SBastien Nocera */ 195ca96ea86SBastien Nocera static int goodix_i2c_read(struct i2c_client *client, 196ca96ea86SBastien Nocera u16 reg, u8 *buf, int len) 197ca96ea86SBastien Nocera { 198ca96ea86SBastien Nocera struct i2c_msg msgs[2]; 199fafef982SMarcin Niestroj __be16 wbuf = cpu_to_be16(reg); 200ca96ea86SBastien Nocera int ret; 201ca96ea86SBastien Nocera 202ca96ea86SBastien Nocera msgs[0].flags = 0; 203ca96ea86SBastien Nocera msgs[0].addr = client->addr; 204ca96ea86SBastien Nocera msgs[0].len = 2; 205ca96ea86SBastien Nocera msgs[0].buf = (u8 *)&wbuf; 206ca96ea86SBastien Nocera 207ca96ea86SBastien Nocera msgs[1].flags = I2C_M_RD; 208ca96ea86SBastien Nocera msgs[1].addr = client->addr; 209ca96ea86SBastien Nocera msgs[1].len = len; 210ca96ea86SBastien Nocera msgs[1].buf = buf; 211ca96ea86SBastien Nocera 212ca96ea86SBastien Nocera ret = i2c_transfer(client->adapter, msgs, 2); 213ca96ea86SBastien Nocera return ret < 0 ? ret : (ret != ARRAY_SIZE(msgs) ? -EIO : 0); 214ca96ea86SBastien Nocera } 215ca96ea86SBastien Nocera 21668caf858SIrina Tirdea /** 21768caf858SIrina Tirdea * goodix_i2c_write - write data to a register of the i2c slave device. 21868caf858SIrina Tirdea * 21968caf858SIrina Tirdea * @client: i2c device. 22068caf858SIrina Tirdea * @reg: the register to write to. 22168caf858SIrina Tirdea * @buf: raw data buffer to write. 22268caf858SIrina Tirdea * @len: length of the buffer to write 22368caf858SIrina Tirdea */ 22468caf858SIrina Tirdea static int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf, 22568caf858SIrina Tirdea unsigned len) 22668caf858SIrina Tirdea { 22768caf858SIrina Tirdea u8 *addr_buf; 22868caf858SIrina Tirdea struct i2c_msg msg; 22968caf858SIrina Tirdea int ret; 23068caf858SIrina Tirdea 23168caf858SIrina Tirdea addr_buf = kmalloc(len + 2, GFP_KERNEL); 23268caf858SIrina Tirdea if (!addr_buf) 23368caf858SIrina Tirdea return -ENOMEM; 23468caf858SIrina Tirdea 23568caf858SIrina Tirdea addr_buf[0] = reg >> 8; 23668caf858SIrina Tirdea addr_buf[1] = reg & 0xFF; 23768caf858SIrina Tirdea memcpy(&addr_buf[2], buf, len); 23868caf858SIrina Tirdea 23968caf858SIrina Tirdea msg.flags = 0; 24068caf858SIrina Tirdea msg.addr = client->addr; 24168caf858SIrina Tirdea msg.buf = addr_buf; 24268caf858SIrina Tirdea msg.len = len + 2; 24368caf858SIrina Tirdea 24468caf858SIrina Tirdea ret = i2c_transfer(client->adapter, &msg, 1); 24568caf858SIrina Tirdea kfree(addr_buf); 24668caf858SIrina Tirdea return ret < 0 ? ret : (ret != 1 ? -EIO : 0); 24768caf858SIrina Tirdea } 24868caf858SIrina Tirdea 2495ab09d6aSIrina Tirdea static int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value) 2505ab09d6aSIrina Tirdea { 2515ab09d6aSIrina Tirdea return goodix_i2c_write(client, reg, &value, sizeof(value)); 2525ab09d6aSIrina Tirdea } 2535ab09d6aSIrina Tirdea 25425309004SMarcin Niestroj static const struct goodix_chip_data *goodix_get_chip_data(u16 id) 255a779fbc6SIrina Tirdea { 256a779fbc6SIrina Tirdea switch (id) { 25725309004SMarcin Niestroj case 1151: 258a5f50c50SJagan Teki case 5663: 25984ef1b33SGuido Günther case 5688: 26025309004SMarcin Niestroj return >1x_chip_data; 26125309004SMarcin Niestroj 262a779fbc6SIrina Tirdea case 911: 263a779fbc6SIrina Tirdea case 9271: 264a779fbc6SIrina Tirdea case 9110: 265a779fbc6SIrina Tirdea case 927: 266a779fbc6SIrina Tirdea case 928: 26725309004SMarcin Niestroj return >911_chip_data; 268a779fbc6SIrina Tirdea 269a779fbc6SIrina Tirdea case 912: 270a779fbc6SIrina Tirdea case 967: 27125309004SMarcin Niestroj return >967_chip_data; 272a779fbc6SIrina Tirdea 273a779fbc6SIrina Tirdea default: 27425309004SMarcin Niestroj return >9x_chip_data; 275a779fbc6SIrina Tirdea } 276a779fbc6SIrina Tirdea } 277a779fbc6SIrina Tirdea 278ca96ea86SBastien Nocera static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data) 279ca96ea86SBastien Nocera { 2809b5db7aaSPaul Cercueil unsigned long max_timeout; 281ca96ea86SBastien Nocera int touch_num; 282ca96ea86SBastien Nocera int error; 283ca96ea86SBastien Nocera 2849b5db7aaSPaul Cercueil /* 2859b5db7aaSPaul Cercueil * The 'buffer status' bit, which indicates that the data is valid, is 2869b5db7aaSPaul Cercueil * not set as soon as the interrupt is raised, but slightly after. 2879b5db7aaSPaul Cercueil * This takes around 10 ms to happen, so we poll for 20 ms. 2889b5db7aaSPaul Cercueil */ 2899b5db7aaSPaul Cercueil max_timeout = jiffies + msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT); 2909b5db7aaSPaul Cercueil do { 2919b5db7aaSPaul Cercueil error = goodix_i2c_read(ts->client, GOODIX_READ_COOR_ADDR, 292bd3b8480SYauhen Kharuzhy data, ts->contact_size + 1); 293ca96ea86SBastien Nocera if (error) { 2949b5db7aaSPaul Cercueil dev_err(&ts->client->dev, "I2C transfer error: %d\n", 2959b5db7aaSPaul Cercueil error); 296ca96ea86SBastien Nocera return error; 297ca96ea86SBastien Nocera } 298ca96ea86SBastien Nocera 2999b5db7aaSPaul Cercueil if (data[0] & GOODIX_BUFFER_STATUS_READY) { 300ca96ea86SBastien Nocera touch_num = data[0] & 0x0f; 301a7ac7c95SAleksei Mamlin if (touch_num > ts->max_touch_num) 302ca96ea86SBastien Nocera return -EPROTO; 303ca96ea86SBastien Nocera 304ca96ea86SBastien Nocera if (touch_num > 1) { 305bd3b8480SYauhen Kharuzhy data += 1 + ts->contact_size; 306ca96ea86SBastien Nocera error = goodix_i2c_read(ts->client, 307ca96ea86SBastien Nocera GOODIX_READ_COOR_ADDR + 308bd3b8480SYauhen Kharuzhy 1 + ts->contact_size, 309ca96ea86SBastien Nocera data, 310bd3b8480SYauhen Kharuzhy ts->contact_size * 3119b5db7aaSPaul Cercueil (touch_num - 1)); 312ca96ea86SBastien Nocera if (error) 313ca96ea86SBastien Nocera return error; 314ca96ea86SBastien Nocera } 315ca96ea86SBastien Nocera 316ca96ea86SBastien Nocera return touch_num; 317ca96ea86SBastien Nocera } 318ca96ea86SBastien Nocera 3199b5db7aaSPaul Cercueil usleep_range(1000, 2000); /* Poll every 1 - 2 ms */ 3209b5db7aaSPaul Cercueil } while (time_before(jiffies, max_timeout)); 3219b5db7aaSPaul Cercueil 3229b5db7aaSPaul Cercueil /* 3239b5db7aaSPaul Cercueil * The Goodix panel will send spurious interrupts after a 3249b5db7aaSPaul Cercueil * 'finger up' event, which will always cause a timeout. 3259b5db7aaSPaul Cercueil */ 3269b5db7aaSPaul Cercueil return 0; 3279b5db7aaSPaul Cercueil } 3289b5db7aaSPaul Cercueil 329bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_8b(struct goodix_ts_data *ts, u8 *coor_data) 330ca96ea86SBastien Nocera { 331ca96ea86SBastien Nocera int id = coor_data[0] & 0x0F; 332ca96ea86SBastien Nocera int input_x = get_unaligned_le16(&coor_data[1]); 333ca96ea86SBastien Nocera int input_y = get_unaligned_le16(&coor_data[3]); 334ca96ea86SBastien Nocera int input_w = get_unaligned_le16(&coor_data[5]); 335ca96ea86SBastien Nocera 336ca96ea86SBastien Nocera input_mt_slot(ts->input_dev, id); 337ca96ea86SBastien Nocera input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 338fafef982SMarcin Niestroj touchscreen_report_pos(ts->input_dev, &ts->prop, 339fafef982SMarcin Niestroj input_x, input_y, true); 340ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 341ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 342ca96ea86SBastien Nocera } 343ca96ea86SBastien Nocera 344bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_9b(struct goodix_ts_data *ts, u8 *coor_data) 345bd3b8480SYauhen Kharuzhy { 346bd3b8480SYauhen Kharuzhy int id = coor_data[1] & 0x0F; 347bd3b8480SYauhen Kharuzhy int input_x = get_unaligned_le16(&coor_data[3]); 348bd3b8480SYauhen Kharuzhy int input_y = get_unaligned_le16(&coor_data[5]); 349bd3b8480SYauhen Kharuzhy int input_w = get_unaligned_le16(&coor_data[7]); 350bd3b8480SYauhen Kharuzhy 351bd3b8480SYauhen Kharuzhy input_mt_slot(ts->input_dev, id); 352bd3b8480SYauhen Kharuzhy input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 353bd3b8480SYauhen Kharuzhy touchscreen_report_pos(ts->input_dev, &ts->prop, 354bd3b8480SYauhen Kharuzhy input_x, input_y, true); 355bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 356bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 357bd3b8480SYauhen Kharuzhy } 358bd3b8480SYauhen Kharuzhy 359ca96ea86SBastien Nocera /** 360ca96ea86SBastien Nocera * goodix_process_events - Process incoming events 361ca96ea86SBastien Nocera * 362ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 363ca96ea86SBastien Nocera * 364ca96ea86SBastien Nocera * Called when the IRQ is triggered. Read the current device state, and push 365ca96ea86SBastien Nocera * the input events to the user space. 366ca96ea86SBastien Nocera */ 367ca96ea86SBastien Nocera static void goodix_process_events(struct goodix_ts_data *ts) 368ca96ea86SBastien Nocera { 369bd3b8480SYauhen Kharuzhy u8 point_data[1 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS]; 370ca96ea86SBastien Nocera int touch_num; 371ca96ea86SBastien Nocera int i; 372ca96ea86SBastien Nocera 373ca96ea86SBastien Nocera touch_num = goodix_ts_read_input_report(ts, point_data); 374ca96ea86SBastien Nocera if (touch_num < 0) 375ca96ea86SBastien Nocera return; 376ca96ea86SBastien Nocera 3774a54feeaSSergei A. Trusov /* 3784a54feeaSSergei A. Trusov * Bit 4 of the first byte reports the status of the capacitive 3794a54feeaSSergei A. Trusov * Windows/Home button. 3804a54feeaSSergei A. Trusov */ 3814a54feeaSSergei A. Trusov input_report_key(ts->input_dev, KEY_LEFTMETA, point_data[0] & BIT(4)); 3824a54feeaSSergei A. Trusov 383ca96ea86SBastien Nocera for (i = 0; i < touch_num; i++) 384bd3b8480SYauhen Kharuzhy if (ts->contact_size == 9) 385bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_9b(ts, 386bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 387bd3b8480SYauhen Kharuzhy else 388bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_8b(ts, 389bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 390ca96ea86SBastien Nocera 391ca96ea86SBastien Nocera input_mt_sync_frame(ts->input_dev); 392ca96ea86SBastien Nocera input_sync(ts->input_dev); 393ca96ea86SBastien Nocera } 394ca96ea86SBastien Nocera 395ca96ea86SBastien Nocera /** 396ca96ea86SBastien Nocera * goodix_ts_irq_handler - The IRQ handler 397ca96ea86SBastien Nocera * 398ca96ea86SBastien Nocera * @irq: interrupt number. 399ca96ea86SBastien Nocera * @dev_id: private data pointer. 400ca96ea86SBastien Nocera */ 401ca96ea86SBastien Nocera static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id) 402ca96ea86SBastien Nocera { 403ca96ea86SBastien Nocera struct goodix_ts_data *ts = dev_id; 404ca96ea86SBastien Nocera 405ca96ea86SBastien Nocera goodix_process_events(ts); 406ca96ea86SBastien Nocera 4075d655b35SIrina Tirdea if (goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0) < 0) 408ca96ea86SBastien Nocera dev_err(&ts->client->dev, "I2C write end_cmd error\n"); 409ca96ea86SBastien Nocera 410ca96ea86SBastien Nocera return IRQ_HANDLED; 411ca96ea86SBastien Nocera } 412ca96ea86SBastien Nocera 4135ab09d6aSIrina Tirdea static void goodix_free_irq(struct goodix_ts_data *ts) 4145ab09d6aSIrina Tirdea { 4155ab09d6aSIrina Tirdea devm_free_irq(&ts->client->dev, ts->client->irq, ts); 4165ab09d6aSIrina Tirdea } 4175ab09d6aSIrina Tirdea 4185ab09d6aSIrina Tirdea static int goodix_request_irq(struct goodix_ts_data *ts) 4195ab09d6aSIrina Tirdea { 4205ab09d6aSIrina Tirdea return devm_request_threaded_irq(&ts->client->dev, ts->client->irq, 4215ab09d6aSIrina Tirdea NULL, goodix_ts_irq_handler, 4225ab09d6aSIrina Tirdea ts->irq_flags, ts->client->name, ts); 4235ab09d6aSIrina Tirdea } 4245ab09d6aSIrina Tirdea 42525309004SMarcin Niestroj static int goodix_check_cfg_8(struct goodix_ts_data *ts, 42668caf858SIrina Tirdea const struct firmware *cfg) 42768caf858SIrina Tirdea { 42825309004SMarcin Niestroj int i, raw_cfg_len = cfg->size - 2; 42968caf858SIrina Tirdea u8 check_sum = 0; 43068caf858SIrina Tirdea 43168caf858SIrina Tirdea for (i = 0; i < raw_cfg_len; i++) 43268caf858SIrina Tirdea check_sum += cfg->data[i]; 43368caf858SIrina Tirdea check_sum = (~check_sum) + 1; 43468caf858SIrina Tirdea if (check_sum != cfg->data[raw_cfg_len]) { 43568caf858SIrina Tirdea dev_err(&ts->client->dev, 43668caf858SIrina Tirdea "The checksum of the config fw is not correct"); 43768caf858SIrina Tirdea return -EINVAL; 43868caf858SIrina Tirdea } 43968caf858SIrina Tirdea 44068caf858SIrina Tirdea if (cfg->data[raw_cfg_len + 1] != 1) { 44168caf858SIrina Tirdea dev_err(&ts->client->dev, 44268caf858SIrina Tirdea "Config fw must have Config_Fresh register set"); 44368caf858SIrina Tirdea return -EINVAL; 44468caf858SIrina Tirdea } 44568caf858SIrina Tirdea 44668caf858SIrina Tirdea return 0; 44768caf858SIrina Tirdea } 44868caf858SIrina Tirdea 44925309004SMarcin Niestroj static int goodix_check_cfg_16(struct goodix_ts_data *ts, 45025309004SMarcin Niestroj const struct firmware *cfg) 45125309004SMarcin Niestroj { 45225309004SMarcin Niestroj int i, raw_cfg_len = cfg->size - 3; 45325309004SMarcin Niestroj u16 check_sum = 0; 45425309004SMarcin Niestroj 45525309004SMarcin Niestroj for (i = 0; i < raw_cfg_len; i += 2) 45625309004SMarcin Niestroj check_sum += get_unaligned_be16(&cfg->data[i]); 45725309004SMarcin Niestroj check_sum = (~check_sum) + 1; 45825309004SMarcin Niestroj if (check_sum != get_unaligned_be16(&cfg->data[raw_cfg_len])) { 45925309004SMarcin Niestroj dev_err(&ts->client->dev, 46025309004SMarcin Niestroj "The checksum of the config fw is not correct"); 46125309004SMarcin Niestroj return -EINVAL; 46225309004SMarcin Niestroj } 46325309004SMarcin Niestroj 46425309004SMarcin Niestroj if (cfg->data[raw_cfg_len + 2] != 1) { 46525309004SMarcin Niestroj dev_err(&ts->client->dev, 46625309004SMarcin Niestroj "Config fw must have Config_Fresh register set"); 46725309004SMarcin Niestroj return -EINVAL; 46825309004SMarcin Niestroj } 46925309004SMarcin Niestroj 47025309004SMarcin Niestroj return 0; 47125309004SMarcin Niestroj } 47225309004SMarcin Niestroj 47325309004SMarcin Niestroj /** 47425309004SMarcin Niestroj * goodix_check_cfg - Checks if config fw is valid 47525309004SMarcin Niestroj * 47625309004SMarcin Niestroj * @ts: goodix_ts_data pointer 47725309004SMarcin Niestroj * @cfg: firmware config data 47825309004SMarcin Niestroj */ 47925309004SMarcin Niestroj static int goodix_check_cfg(struct goodix_ts_data *ts, 48025309004SMarcin Niestroj const struct firmware *cfg) 48125309004SMarcin Niestroj { 48225309004SMarcin Niestroj if (cfg->size > GOODIX_CONFIG_MAX_LENGTH) { 48325309004SMarcin Niestroj dev_err(&ts->client->dev, 48425309004SMarcin Niestroj "The length of the config fw is not correct"); 48525309004SMarcin Niestroj return -EINVAL; 48625309004SMarcin Niestroj } 48725309004SMarcin Niestroj 48825309004SMarcin Niestroj return ts->chip->check_config(ts, cfg); 48925309004SMarcin Niestroj } 49025309004SMarcin Niestroj 49168caf858SIrina Tirdea /** 49268caf858SIrina Tirdea * goodix_send_cfg - Write fw config to device 49368caf858SIrina Tirdea * 49468caf858SIrina Tirdea * @ts: goodix_ts_data pointer 49568caf858SIrina Tirdea * @cfg: config firmware to write to device 49668caf858SIrina Tirdea */ 49768caf858SIrina Tirdea static int goodix_send_cfg(struct goodix_ts_data *ts, 49868caf858SIrina Tirdea const struct firmware *cfg) 49968caf858SIrina Tirdea { 50068caf858SIrina Tirdea int error; 50168caf858SIrina Tirdea 50268caf858SIrina Tirdea error = goodix_check_cfg(ts, cfg); 50368caf858SIrina Tirdea if (error) 50468caf858SIrina Tirdea return error; 50568caf858SIrina Tirdea 50625309004SMarcin Niestroj error = goodix_i2c_write(ts->client, ts->chip->config_addr, cfg->data, 50768caf858SIrina Tirdea cfg->size); 50868caf858SIrina Tirdea if (error) { 50968caf858SIrina Tirdea dev_err(&ts->client->dev, "Failed to write config data: %d", 51068caf858SIrina Tirdea error); 51168caf858SIrina Tirdea return error; 51268caf858SIrina Tirdea } 51368caf858SIrina Tirdea dev_dbg(&ts->client->dev, "Config sent successfully."); 51468caf858SIrina Tirdea 51568caf858SIrina Tirdea /* Let the firmware reconfigure itself, so sleep for 10ms */ 51668caf858SIrina Tirdea usleep_range(10000, 11000); 51768caf858SIrina Tirdea 51868caf858SIrina Tirdea return 0; 51968caf858SIrina Tirdea } 52068caf858SIrina Tirdea 521ec6e1b40SIrina Tirdea static int goodix_int_sync(struct goodix_ts_data *ts) 522ec6e1b40SIrina Tirdea { 523ec6e1b40SIrina Tirdea int error; 524ec6e1b40SIrina Tirdea 525ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, 0); 526ec6e1b40SIrina Tirdea if (error) 527ec6e1b40SIrina Tirdea return error; 528ec6e1b40SIrina Tirdea 529ec6e1b40SIrina Tirdea msleep(50); /* T5: 50ms */ 530ec6e1b40SIrina Tirdea 531ec6e1b40SIrina Tirdea error = gpiod_direction_input(ts->gpiod_int); 532ec6e1b40SIrina Tirdea if (error) 533ec6e1b40SIrina Tirdea return error; 534ec6e1b40SIrina Tirdea 535ec6e1b40SIrina Tirdea return 0; 536ec6e1b40SIrina Tirdea } 537ec6e1b40SIrina Tirdea 538ec6e1b40SIrina Tirdea /** 539ec6e1b40SIrina Tirdea * goodix_reset - Reset device during power on 540ec6e1b40SIrina Tirdea * 541ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 542ec6e1b40SIrina Tirdea */ 543ec6e1b40SIrina Tirdea static int goodix_reset(struct goodix_ts_data *ts) 544ec6e1b40SIrina Tirdea { 545ec6e1b40SIrina Tirdea int error; 546ec6e1b40SIrina Tirdea 547ec6e1b40SIrina Tirdea /* begin select I2C slave addr */ 548ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 0); 549ec6e1b40SIrina Tirdea if (error) 550ec6e1b40SIrina Tirdea return error; 551ec6e1b40SIrina Tirdea 552ec6e1b40SIrina Tirdea msleep(20); /* T2: > 10ms */ 553ec6e1b40SIrina Tirdea 554ec6e1b40SIrina Tirdea /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */ 555ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, ts->client->addr == 0x14); 556ec6e1b40SIrina Tirdea if (error) 557ec6e1b40SIrina Tirdea return error; 558ec6e1b40SIrina Tirdea 559ec6e1b40SIrina Tirdea usleep_range(100, 2000); /* T3: > 100us */ 560ec6e1b40SIrina Tirdea 561ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 1); 562ec6e1b40SIrina Tirdea if (error) 563ec6e1b40SIrina Tirdea return error; 564ec6e1b40SIrina Tirdea 565ec6e1b40SIrina Tirdea usleep_range(6000, 10000); /* T4: > 5ms */ 566ec6e1b40SIrina Tirdea 567ec6e1b40SIrina Tirdea /* end select I2C slave addr */ 568ec6e1b40SIrina Tirdea error = gpiod_direction_input(ts->gpiod_rst); 569ec6e1b40SIrina Tirdea if (error) 570ec6e1b40SIrina Tirdea return error; 571ec6e1b40SIrina Tirdea 572ec6e1b40SIrina Tirdea error = goodix_int_sync(ts); 573ec6e1b40SIrina Tirdea if (error) 574ec6e1b40SIrina Tirdea return error; 575ec6e1b40SIrina Tirdea 576ec6e1b40SIrina Tirdea return 0; 577ec6e1b40SIrina Tirdea } 578ec6e1b40SIrina Tirdea 579ec6e1b40SIrina Tirdea /** 580ec6e1b40SIrina Tirdea * goodix_get_gpio_config - Get GPIO config from ACPI/DT 581ec6e1b40SIrina Tirdea * 582ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 583ec6e1b40SIrina Tirdea */ 584ec6e1b40SIrina Tirdea static int goodix_get_gpio_config(struct goodix_ts_data *ts) 585ec6e1b40SIrina Tirdea { 586ec6e1b40SIrina Tirdea int error; 587ec6e1b40SIrina Tirdea struct device *dev; 588ec6e1b40SIrina Tirdea struct gpio_desc *gpiod; 589ec6e1b40SIrina Tirdea 590ec6e1b40SIrina Tirdea if (!ts->client) 591ec6e1b40SIrina Tirdea return -EINVAL; 592ec6e1b40SIrina Tirdea dev = &ts->client->dev; 593ec6e1b40SIrina Tirdea 594ae97fb58SJagan Teki ts->avdd28 = devm_regulator_get(dev, "AVDD28"); 595ae97fb58SJagan Teki if (IS_ERR(ts->avdd28)) { 596ae97fb58SJagan Teki error = PTR_ERR(ts->avdd28); 597ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 598ae97fb58SJagan Teki dev_err(dev, 599ae97fb58SJagan Teki "Failed to get AVDD28 regulator: %d\n", error); 600ae97fb58SJagan Teki return error; 601ae97fb58SJagan Teki } 602ae97fb58SJagan Teki 603ae97fb58SJagan Teki ts->vddio = devm_regulator_get(dev, "VDDIO"); 604ae97fb58SJagan Teki if (IS_ERR(ts->vddio)) { 605ae97fb58SJagan Teki error = PTR_ERR(ts->vddio); 606ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 607ae97fb58SJagan Teki dev_err(dev, 608ae97fb58SJagan Teki "Failed to get VDDIO regulator: %d\n", error); 609ae97fb58SJagan Teki return error; 610ae97fb58SJagan Teki } 611ae97fb58SJagan Teki 612ec6e1b40SIrina Tirdea /* Get the interrupt GPIO pin number */ 613ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN); 614ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 615ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 616ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 617ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 618ec6e1b40SIrina Tirdea GOODIX_GPIO_INT_NAME, error); 619ec6e1b40SIrina Tirdea return error; 620ec6e1b40SIrina Tirdea } 621ec6e1b40SIrina Tirdea 622ec6e1b40SIrina Tirdea ts->gpiod_int = gpiod; 623ec6e1b40SIrina Tirdea 624ec6e1b40SIrina Tirdea /* Get the reset line GPIO pin number */ 625ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, GPIOD_IN); 626ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 627ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 628ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 629ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 630ec6e1b40SIrina Tirdea GOODIX_GPIO_RST_NAME, error); 631ec6e1b40SIrina Tirdea return error; 632ec6e1b40SIrina Tirdea } 633ec6e1b40SIrina Tirdea 634ec6e1b40SIrina Tirdea ts->gpiod_rst = gpiod; 635ec6e1b40SIrina Tirdea 636ec6e1b40SIrina Tirdea return 0; 637ec6e1b40SIrina Tirdea } 638ec6e1b40SIrina Tirdea 639ca96ea86SBastien Nocera /** 640ca96ea86SBastien Nocera * goodix_read_config - Read the embedded configuration of the panel 641ca96ea86SBastien Nocera * 642ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 643ca96ea86SBastien Nocera * 644ca96ea86SBastien Nocera * Must be called during probe 645ca96ea86SBastien Nocera */ 646ca96ea86SBastien Nocera static void goodix_read_config(struct goodix_ts_data *ts) 647ca96ea86SBastien Nocera { 648ca96ea86SBastien Nocera u8 config[GOODIX_CONFIG_MAX_LENGTH]; 649fafef982SMarcin Niestroj int x_max, y_max; 650ca96ea86SBastien Nocera int error; 651ca96ea86SBastien Nocera 65225309004SMarcin Niestroj error = goodix_i2c_read(ts->client, ts->chip->config_addr, 65325309004SMarcin Niestroj config, ts->chip->config_len); 654ca96ea86SBastien Nocera if (error) { 655fafef982SMarcin Niestroj dev_warn(&ts->client->dev, "Error reading config: %d\n", 656ca96ea86SBastien Nocera error); 657ca96ea86SBastien Nocera ts->int_trigger_type = GOODIX_INT_TRIGGER; 658a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 659ca96ea86SBastien Nocera return; 660ca96ea86SBastien Nocera } 661ca96ea86SBastien Nocera 662a7ac7c95SAleksei Mamlin ts->int_trigger_type = config[TRIGGER_LOC] & 0x03; 663a7ac7c95SAleksei Mamlin ts->max_touch_num = config[MAX_CONTACTS_LOC] & 0x0f; 6648b5a359cSBastien Nocera 665fafef982SMarcin Niestroj x_max = get_unaligned_le16(&config[RESOLUTION_LOC]); 666fafef982SMarcin Niestroj y_max = get_unaligned_le16(&config[RESOLUTION_LOC + 2]); 667fafef982SMarcin Niestroj if (x_max && y_max) { 668fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_X, x_max - 1); 669fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_Y, y_max - 1); 670ca96ea86SBastien Nocera } 67157c80e8eSKarsten Merker } 672ca96ea86SBastien Nocera 673ca96ea86SBastien Nocera /** 674ca96ea86SBastien Nocera * goodix_read_version - Read goodix touchscreen version 675ca96ea86SBastien Nocera * 67668caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 677ca96ea86SBastien Nocera */ 67868caf858SIrina Tirdea static int goodix_read_version(struct goodix_ts_data *ts) 679ca96ea86SBastien Nocera { 680ca96ea86SBastien Nocera int error; 681ca96ea86SBastien Nocera u8 buf[6]; 682e70b0307SIrina Tirdea char id_str[5]; 683ca96ea86SBastien Nocera 68468caf858SIrina Tirdea error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf)); 685ca96ea86SBastien Nocera if (error) { 68668caf858SIrina Tirdea dev_err(&ts->client->dev, "read version failed: %d\n", error); 687ca96ea86SBastien Nocera return error; 688ca96ea86SBastien Nocera } 689ca96ea86SBastien Nocera 690e70b0307SIrina Tirdea memcpy(id_str, buf, 4); 691e70b0307SIrina Tirdea id_str[4] = 0; 69268caf858SIrina Tirdea if (kstrtou16(id_str, 10, &ts->id)) 69368caf858SIrina Tirdea ts->id = 0x1001; 694e70b0307SIrina Tirdea 69568caf858SIrina Tirdea ts->version = get_unaligned_le16(&buf[4]); 696ca96ea86SBastien Nocera 69768caf858SIrina Tirdea dev_info(&ts->client->dev, "ID %d, version: %04x\n", ts->id, 69868caf858SIrina Tirdea ts->version); 699ca96ea86SBastien Nocera 700ca96ea86SBastien Nocera return 0; 701ca96ea86SBastien Nocera } 702ca96ea86SBastien Nocera 703ca96ea86SBastien Nocera /** 704ca96ea86SBastien Nocera * goodix_i2c_test - I2C test function to check if the device answers. 705ca96ea86SBastien Nocera * 706ca96ea86SBastien Nocera * @client: the i2c client 707ca96ea86SBastien Nocera */ 708ca96ea86SBastien Nocera static int goodix_i2c_test(struct i2c_client *client) 709ca96ea86SBastien Nocera { 710ca96ea86SBastien Nocera int retry = 0; 711ca96ea86SBastien Nocera int error; 712ca96ea86SBastien Nocera u8 test; 713ca96ea86SBastien Nocera 714ca96ea86SBastien Nocera while (retry++ < 2) { 71525309004SMarcin Niestroj error = goodix_i2c_read(client, GOODIX_REG_ID, 716ca96ea86SBastien Nocera &test, 1); 717ca96ea86SBastien Nocera if (!error) 718ca96ea86SBastien Nocera return 0; 719ca96ea86SBastien Nocera 720ca96ea86SBastien Nocera dev_err(&client->dev, "i2c test failed attempt %d: %d\n", 721ca96ea86SBastien Nocera retry, error); 722ca96ea86SBastien Nocera msleep(20); 723ca96ea86SBastien Nocera } 724ca96ea86SBastien Nocera 725ca96ea86SBastien Nocera return error; 726ca96ea86SBastien Nocera } 727ca96ea86SBastien Nocera 728ca96ea86SBastien Nocera /** 72968caf858SIrina Tirdea * goodix_configure_dev - Finish device initialization 73068caf858SIrina Tirdea * 73168caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 73268caf858SIrina Tirdea * 73368caf858SIrina Tirdea * Must be called from probe to finish initialization of the device. 73468caf858SIrina Tirdea * Contains the common initialization code for both devices that 73568caf858SIrina Tirdea * declare gpio pins and devices that do not. It is either called 73668caf858SIrina Tirdea * directly from probe or from request_firmware_wait callback. 73768caf858SIrina Tirdea */ 73868caf858SIrina Tirdea static int goodix_configure_dev(struct goodix_ts_data *ts) 73968caf858SIrina Tirdea { 74068caf858SIrina Tirdea int error; 74168caf858SIrina Tirdea 742fafef982SMarcin Niestroj ts->int_trigger_type = GOODIX_INT_TRIGGER; 743fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 744ad48cf5eSKarsten Merker 745fafef982SMarcin Niestroj ts->input_dev = devm_input_allocate_device(&ts->client->dev); 746fafef982SMarcin Niestroj if (!ts->input_dev) { 747fafef982SMarcin Niestroj dev_err(&ts->client->dev, "Failed to allocate input device."); 748fafef982SMarcin Niestroj return -ENOMEM; 749fafef982SMarcin Niestroj } 750fafef982SMarcin Niestroj 751fafef982SMarcin Niestroj ts->input_dev->name = "Goodix Capacitive TouchScreen"; 752fafef982SMarcin Niestroj ts->input_dev->phys = "input/ts"; 753fafef982SMarcin Niestroj ts->input_dev->id.bustype = BUS_I2C; 754fafef982SMarcin Niestroj ts->input_dev->id.vendor = 0x0416; 755fafef982SMarcin Niestroj ts->input_dev->id.product = ts->id; 756fafef982SMarcin Niestroj ts->input_dev->id.version = ts->version; 757fafef982SMarcin Niestroj 758fafef982SMarcin Niestroj /* Capacitive Windows/Home button on some devices */ 759fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_KEY, KEY_LEFTMETA); 760fafef982SMarcin Niestroj 761fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X); 762fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y); 763fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 764fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 765fafef982SMarcin Niestroj 766fafef982SMarcin Niestroj /* Read configuration and apply touchscreen parameters */ 76768caf858SIrina Tirdea goodix_read_config(ts); 76868caf858SIrina Tirdea 769fafef982SMarcin Niestroj /* Try overriding touchscreen parameters via device properties */ 770fafef982SMarcin Niestroj touchscreen_parse_properties(ts->input_dev, true, &ts->prop); 771fafef982SMarcin Niestroj 772fafef982SMarcin Niestroj if (!ts->prop.max_x || !ts->prop.max_y || !ts->max_touch_num) { 773c1c00aa5SGuido Günther dev_err(&ts->client->dev, 774c1c00aa5SGuido Günther "Invalid config (%d, %d, %d), using defaults\n", 775c1c00aa5SGuido Günther ts->prop.max_x, ts->prop.max_y, ts->max_touch_num); 776fafef982SMarcin Niestroj ts->prop.max_x = GOODIX_MAX_WIDTH - 1; 777fafef982SMarcin Niestroj ts->prop.max_y = GOODIX_MAX_HEIGHT - 1; 778fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 779fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 780fafef982SMarcin Niestroj ABS_MT_POSITION_X, ts->prop.max_x); 781fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 782fafef982SMarcin Niestroj ABS_MT_POSITION_Y, ts->prop.max_y); 783fafef982SMarcin Niestroj } 784fafef982SMarcin Niestroj 785fafef982SMarcin Niestroj if (dmi_check_system(rotated_screen)) { 786fafef982SMarcin Niestroj ts->prop.invert_x = true; 787fafef982SMarcin Niestroj ts->prop.invert_y = true; 788fafef982SMarcin Niestroj dev_dbg(&ts->client->dev, 789fafef982SMarcin Niestroj "Applying '180 degrees rotated screen' quirk\n"); 790fafef982SMarcin Niestroj } 791fafef982SMarcin Niestroj 792bd3b8480SYauhen Kharuzhy if (dmi_check_system(nine_bytes_report)) { 793bd3b8480SYauhen Kharuzhy ts->contact_size = 9; 794bd3b8480SYauhen Kharuzhy 795bd3b8480SYauhen Kharuzhy dev_dbg(&ts->client->dev, 796bd3b8480SYauhen Kharuzhy "Non-standard 9-bytes report format quirk\n"); 797bd3b8480SYauhen Kharuzhy } 798bd3b8480SYauhen Kharuzhy 7991dd5ddc1SSergei A. Trusov if (dmi_check_system(inverted_x_screen)) { 8001dd5ddc1SSergei A. Trusov ts->prop.invert_x = true; 8011dd5ddc1SSergei A. Trusov dev_dbg(&ts->client->dev, 8021dd5ddc1SSergei A. Trusov "Applying 'inverted x screen' quirk\n"); 8031dd5ddc1SSergei A. Trusov } 8041dd5ddc1SSergei A. Trusov 805fafef982SMarcin Niestroj error = input_mt_init_slots(ts->input_dev, ts->max_touch_num, 806fafef982SMarcin Niestroj INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); 807fafef982SMarcin Niestroj if (error) { 808fafef982SMarcin Niestroj dev_err(&ts->client->dev, 809fafef982SMarcin Niestroj "Failed to initialize MT slots: %d", error); 81068caf858SIrina Tirdea return error; 811fafef982SMarcin Niestroj } 812fafef982SMarcin Niestroj 813fafef982SMarcin Niestroj error = input_register_device(ts->input_dev); 814fafef982SMarcin Niestroj if (error) { 815fafef982SMarcin Niestroj dev_err(&ts->client->dev, 816fafef982SMarcin Niestroj "Failed to register input device: %d", error); 817fafef982SMarcin Niestroj return error; 818fafef982SMarcin Niestroj } 81968caf858SIrina Tirdea 8205ab09d6aSIrina Tirdea ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT; 8215ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 82268caf858SIrina Tirdea if (error) { 82368caf858SIrina Tirdea dev_err(&ts->client->dev, "request IRQ failed: %d\n", error); 82468caf858SIrina Tirdea return error; 82568caf858SIrina Tirdea } 82668caf858SIrina Tirdea 82768caf858SIrina Tirdea return 0; 82868caf858SIrina Tirdea } 82968caf858SIrina Tirdea 83068caf858SIrina Tirdea /** 83168caf858SIrina Tirdea * goodix_config_cb - Callback to finish device init 83268caf858SIrina Tirdea * 83368caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 83468caf858SIrina Tirdea * 83568caf858SIrina Tirdea * request_firmware_wait callback that finishes 83668caf858SIrina Tirdea * initialization of the device. 83768caf858SIrina Tirdea */ 83868caf858SIrina Tirdea static void goodix_config_cb(const struct firmware *cfg, void *ctx) 83968caf858SIrina Tirdea { 84068caf858SIrina Tirdea struct goodix_ts_data *ts = ctx; 84168caf858SIrina Tirdea int error; 84268caf858SIrina Tirdea 84368caf858SIrina Tirdea if (cfg) { 84468caf858SIrina Tirdea /* send device configuration to the firmware */ 84568caf858SIrina Tirdea error = goodix_send_cfg(ts, cfg); 84668caf858SIrina Tirdea if (error) 84768caf858SIrina Tirdea goto err_release_cfg; 84868caf858SIrina Tirdea } 84968caf858SIrina Tirdea 85068caf858SIrina Tirdea goodix_configure_dev(ts); 85168caf858SIrina Tirdea 85268caf858SIrina Tirdea err_release_cfg: 85368caf858SIrina Tirdea release_firmware(cfg); 85468caf858SIrina Tirdea complete_all(&ts->firmware_loading_complete); 85568caf858SIrina Tirdea } 85668caf858SIrina Tirdea 857ae97fb58SJagan Teki static void goodix_disable_regulators(void *arg) 858ae97fb58SJagan Teki { 859ae97fb58SJagan Teki struct goodix_ts_data *ts = arg; 860ae97fb58SJagan Teki 861ae97fb58SJagan Teki regulator_disable(ts->vddio); 862ae97fb58SJagan Teki regulator_disable(ts->avdd28); 863ae97fb58SJagan Teki } 864ae97fb58SJagan Teki 865ca96ea86SBastien Nocera static int goodix_ts_probe(struct i2c_client *client, 866ca96ea86SBastien Nocera const struct i2c_device_id *id) 867ca96ea86SBastien Nocera { 868ca96ea86SBastien Nocera struct goodix_ts_data *ts; 869ca96ea86SBastien Nocera int error; 870ca96ea86SBastien Nocera 871ca96ea86SBastien Nocera dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr); 872ca96ea86SBastien Nocera 873ca96ea86SBastien Nocera if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 874ca96ea86SBastien Nocera dev_err(&client->dev, "I2C check functionality failed.\n"); 875ca96ea86SBastien Nocera return -ENXIO; 876ca96ea86SBastien Nocera } 877ca96ea86SBastien Nocera 878ca96ea86SBastien Nocera ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); 879ca96ea86SBastien Nocera if (!ts) 880ca96ea86SBastien Nocera return -ENOMEM; 881ca96ea86SBastien Nocera 882ca96ea86SBastien Nocera ts->client = client; 883ca96ea86SBastien Nocera i2c_set_clientdata(client, ts); 88468caf858SIrina Tirdea init_completion(&ts->firmware_loading_complete); 885bd3b8480SYauhen Kharuzhy ts->contact_size = GOODIX_CONTACT_SIZE; 886ca96ea86SBastien Nocera 887ec6e1b40SIrina Tirdea error = goodix_get_gpio_config(ts); 888ec6e1b40SIrina Tirdea if (error) 889ec6e1b40SIrina Tirdea return error; 890ec6e1b40SIrina Tirdea 891ae97fb58SJagan Teki /* power up the controller */ 892ae97fb58SJagan Teki error = regulator_enable(ts->avdd28); 893ae97fb58SJagan Teki if (error) { 894ae97fb58SJagan Teki dev_err(&client->dev, 895ae97fb58SJagan Teki "Failed to enable AVDD28 regulator: %d\n", 896ae97fb58SJagan Teki error); 897ae97fb58SJagan Teki return error; 898ae97fb58SJagan Teki } 899ae97fb58SJagan Teki 900ae97fb58SJagan Teki error = regulator_enable(ts->vddio); 901ae97fb58SJagan Teki if (error) { 902ae97fb58SJagan Teki dev_err(&client->dev, 903ae97fb58SJagan Teki "Failed to enable VDDIO regulator: %d\n", 904ae97fb58SJagan Teki error); 905ae97fb58SJagan Teki regulator_disable(ts->avdd28); 906ae97fb58SJagan Teki return error; 907ae97fb58SJagan Teki } 908ae97fb58SJagan Teki 909ae97fb58SJagan Teki error = devm_add_action_or_reset(&client->dev, 910ae97fb58SJagan Teki goodix_disable_regulators, ts); 911ae97fb58SJagan Teki if (error) 912ae97fb58SJagan Teki return error; 913ae97fb58SJagan Teki 914ec6e1b40SIrina Tirdea if (ts->gpiod_int && ts->gpiod_rst) { 915ec6e1b40SIrina Tirdea /* reset the controller */ 916ec6e1b40SIrina Tirdea error = goodix_reset(ts); 917ec6e1b40SIrina Tirdea if (error) { 918ec6e1b40SIrina Tirdea dev_err(&client->dev, "Controller reset failed.\n"); 919ec6e1b40SIrina Tirdea return error; 920ec6e1b40SIrina Tirdea } 921ec6e1b40SIrina Tirdea } 922ec6e1b40SIrina Tirdea 923ca96ea86SBastien Nocera error = goodix_i2c_test(client); 924ca96ea86SBastien Nocera if (error) { 925ca96ea86SBastien Nocera dev_err(&client->dev, "I2C communication failure: %d\n", error); 926ca96ea86SBastien Nocera return error; 927ca96ea86SBastien Nocera } 928ca96ea86SBastien Nocera 92968caf858SIrina Tirdea error = goodix_read_version(ts); 930ca96ea86SBastien Nocera if (error) { 931ca96ea86SBastien Nocera dev_err(&client->dev, "Read version failed.\n"); 932ca96ea86SBastien Nocera return error; 933ca96ea86SBastien Nocera } 934ca96ea86SBastien Nocera 93525309004SMarcin Niestroj ts->chip = goodix_get_chip_data(ts->id); 936a779fbc6SIrina Tirdea 93768caf858SIrina Tirdea if (ts->gpiod_int && ts->gpiod_rst) { 93868caf858SIrina Tirdea /* update device config */ 93968caf858SIrina Tirdea ts->cfg_name = devm_kasprintf(&client->dev, GFP_KERNEL, 94068caf858SIrina Tirdea "goodix_%d_cfg.bin", ts->id); 94168caf858SIrina Tirdea if (!ts->cfg_name) 94268caf858SIrina Tirdea return -ENOMEM; 943ca96ea86SBastien Nocera 94468caf858SIrina Tirdea error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name, 94568caf858SIrina Tirdea &client->dev, GFP_KERNEL, ts, 94668caf858SIrina Tirdea goodix_config_cb); 947ca96ea86SBastien Nocera if (error) { 94868caf858SIrina Tirdea dev_err(&client->dev, 94968caf858SIrina Tirdea "Failed to invoke firmware loader: %d\n", 95068caf858SIrina Tirdea error); 951ca96ea86SBastien Nocera return error; 952ca96ea86SBastien Nocera } 953ca96ea86SBastien Nocera 954ca96ea86SBastien Nocera return 0; 95568caf858SIrina Tirdea } else { 95668caf858SIrina Tirdea error = goodix_configure_dev(ts); 95768caf858SIrina Tirdea if (error) 95868caf858SIrina Tirdea return error; 95968caf858SIrina Tirdea } 96068caf858SIrina Tirdea 96168caf858SIrina Tirdea return 0; 96268caf858SIrina Tirdea } 96368caf858SIrina Tirdea 96468caf858SIrina Tirdea static int goodix_ts_remove(struct i2c_client *client) 96568caf858SIrina Tirdea { 96668caf858SIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 96768caf858SIrina Tirdea 96868caf858SIrina Tirdea if (ts->gpiod_int && ts->gpiod_rst) 96968caf858SIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 97068caf858SIrina Tirdea 97168caf858SIrina Tirdea return 0; 972ca96ea86SBastien Nocera } 973ca96ea86SBastien Nocera 9745ab09d6aSIrina Tirdea static int __maybe_unused goodix_suspend(struct device *dev) 9755ab09d6aSIrina Tirdea { 9765ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 9775ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 9785ab09d6aSIrina Tirdea int error; 9795ab09d6aSIrina Tirdea 9805ab09d6aSIrina Tirdea /* We need gpio pins to suspend/resume */ 981faec44b6SHans de Goede if (!ts->gpiod_int || !ts->gpiod_rst) { 982faec44b6SHans de Goede disable_irq(client->irq); 9835ab09d6aSIrina Tirdea return 0; 984faec44b6SHans de Goede } 9855ab09d6aSIrina Tirdea 9865ab09d6aSIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 9875ab09d6aSIrina Tirdea 9885ab09d6aSIrina Tirdea /* Free IRQ as IRQ pin is used as output in the suspend sequence */ 9895ab09d6aSIrina Tirdea goodix_free_irq(ts); 9905ab09d6aSIrina Tirdea 9915ab09d6aSIrina Tirdea /* Output LOW on the INT pin for 5 ms */ 9925ab09d6aSIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, 0); 9935ab09d6aSIrina Tirdea if (error) { 9945ab09d6aSIrina Tirdea goodix_request_irq(ts); 9955ab09d6aSIrina Tirdea return error; 9965ab09d6aSIrina Tirdea } 9975ab09d6aSIrina Tirdea 9985ab09d6aSIrina Tirdea usleep_range(5000, 6000); 9995ab09d6aSIrina Tirdea 10005ab09d6aSIrina Tirdea error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND, 10015ab09d6aSIrina Tirdea GOODIX_CMD_SCREEN_OFF); 10025ab09d6aSIrina Tirdea if (error) { 10035ab09d6aSIrina Tirdea dev_err(&ts->client->dev, "Screen off command failed\n"); 10045ab09d6aSIrina Tirdea gpiod_direction_input(ts->gpiod_int); 10055ab09d6aSIrina Tirdea goodix_request_irq(ts); 10065ab09d6aSIrina Tirdea return -EAGAIN; 10075ab09d6aSIrina Tirdea } 10085ab09d6aSIrina Tirdea 10095ab09d6aSIrina Tirdea /* 10105ab09d6aSIrina Tirdea * The datasheet specifies that the interval between sending screen-off 10115ab09d6aSIrina Tirdea * command and wake-up should be longer than 58 ms. To avoid waking up 10125ab09d6aSIrina Tirdea * sooner, delay 58ms here. 10135ab09d6aSIrina Tirdea */ 10145ab09d6aSIrina Tirdea msleep(58); 10155ab09d6aSIrina Tirdea return 0; 10165ab09d6aSIrina Tirdea } 10175ab09d6aSIrina Tirdea 10185ab09d6aSIrina Tirdea static int __maybe_unused goodix_resume(struct device *dev) 10195ab09d6aSIrina Tirdea { 10205ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 10215ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 10225ab09d6aSIrina Tirdea int error; 10235ab09d6aSIrina Tirdea 1024faec44b6SHans de Goede if (!ts->gpiod_int || !ts->gpiod_rst) { 1025faec44b6SHans de Goede enable_irq(client->irq); 10265ab09d6aSIrina Tirdea return 0; 1027faec44b6SHans de Goede } 10285ab09d6aSIrina Tirdea 10295ab09d6aSIrina Tirdea /* 10305ab09d6aSIrina Tirdea * Exit sleep mode by outputting HIGH level to INT pin 10315ab09d6aSIrina Tirdea * for 2ms~5ms. 10325ab09d6aSIrina Tirdea */ 10335ab09d6aSIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, 1); 10345ab09d6aSIrina Tirdea if (error) 10355ab09d6aSIrina Tirdea return error; 10365ab09d6aSIrina Tirdea 10375ab09d6aSIrina Tirdea usleep_range(2000, 5000); 10385ab09d6aSIrina Tirdea 10395ab09d6aSIrina Tirdea error = goodix_int_sync(ts); 10405ab09d6aSIrina Tirdea if (error) 10415ab09d6aSIrina Tirdea return error; 10425ab09d6aSIrina Tirdea 10435ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 10445ab09d6aSIrina Tirdea if (error) 10455ab09d6aSIrina Tirdea return error; 10465ab09d6aSIrina Tirdea 10475ab09d6aSIrina Tirdea return 0; 10485ab09d6aSIrina Tirdea } 10495ab09d6aSIrina Tirdea 10505ab09d6aSIrina Tirdea static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume); 10515ab09d6aSIrina Tirdea 1052ca96ea86SBastien Nocera static const struct i2c_device_id goodix_ts_id[] = { 1053ca96ea86SBastien Nocera { "GDIX1001:00", 0 }, 1054ca96ea86SBastien Nocera { } 1055ca96ea86SBastien Nocera }; 10562e9e910eSJavier Martinez Canillas MODULE_DEVICE_TABLE(i2c, goodix_ts_id); 1057ca96ea86SBastien Nocera 1058771d8f1bSAleksei Mamlin #ifdef CONFIG_ACPI 1059ca96ea86SBastien Nocera static const struct acpi_device_id goodix_acpi_match[] = { 1060ca96ea86SBastien Nocera { "GDIX1001", 0 }, 10615ca4d1aeSEthan Lee { "GDIX1002", 0 }, 1062ca96ea86SBastien Nocera { } 1063ca96ea86SBastien Nocera }; 1064ca96ea86SBastien Nocera MODULE_DEVICE_TABLE(acpi, goodix_acpi_match); 1065771d8f1bSAleksei Mamlin #endif 1066771d8f1bSAleksei Mamlin 1067771d8f1bSAleksei Mamlin #ifdef CONFIG_OF 1068771d8f1bSAleksei Mamlin static const struct of_device_id goodix_of_match[] = { 106925309004SMarcin Niestroj { .compatible = "goodix,gt1151" }, 1070a5f50c50SJagan Teki { .compatible = "goodix,gt5663" }, 107184ef1b33SGuido Günther { .compatible = "goodix,gt5688" }, 1072771d8f1bSAleksei Mamlin { .compatible = "goodix,gt911" }, 1073771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9110" }, 1074771d8f1bSAleksei Mamlin { .compatible = "goodix,gt912" }, 1075771d8f1bSAleksei Mamlin { .compatible = "goodix,gt927" }, 1076771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9271" }, 1077771d8f1bSAleksei Mamlin { .compatible = "goodix,gt928" }, 1078771d8f1bSAleksei Mamlin { .compatible = "goodix,gt967" }, 1079771d8f1bSAleksei Mamlin { } 1080771d8f1bSAleksei Mamlin }; 1081771d8f1bSAleksei Mamlin MODULE_DEVICE_TABLE(of, goodix_of_match); 1082771d8f1bSAleksei Mamlin #endif 1083ca96ea86SBastien Nocera 1084ca96ea86SBastien Nocera static struct i2c_driver goodix_ts_driver = { 1085ca96ea86SBastien Nocera .probe = goodix_ts_probe, 108668caf858SIrina Tirdea .remove = goodix_ts_remove, 1087ca96ea86SBastien Nocera .id_table = goodix_ts_id, 1088ca96ea86SBastien Nocera .driver = { 1089ca96ea86SBastien Nocera .name = "Goodix-TS", 1090771d8f1bSAleksei Mamlin .acpi_match_table = ACPI_PTR(goodix_acpi_match), 1091771d8f1bSAleksei Mamlin .of_match_table = of_match_ptr(goodix_of_match), 10925ab09d6aSIrina Tirdea .pm = &goodix_pm_ops, 1093ca96ea86SBastien Nocera }, 1094ca96ea86SBastien Nocera }; 1095ca96ea86SBastien Nocera module_i2c_driver(goodix_ts_driver); 1096ca96ea86SBastien Nocera 1097ca96ea86SBastien Nocera MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); 1098ca96ea86SBastien Nocera MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>"); 1099ca96ea86SBastien Nocera MODULE_DESCRIPTION("Goodix touchscreen driver"); 1100ca96ea86SBastien Nocera MODULE_LICENSE("GPL v2"); 1101