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> 17ca96ea86SBastien Nocera #include <linux/module.h> 18ca96ea86SBastien Nocera #include <linux/delay.h> 19ca96ea86SBastien Nocera #include <linux/irq.h> 20ca96ea86SBastien Nocera #include <linux/interrupt.h> 21ca96ea86SBastien Nocera #include <linux/slab.h> 22771d8f1bSAleksei Mamlin #include <linux/acpi.h> 23771d8f1bSAleksei Mamlin #include <linux/of.h> 24ca96ea86SBastien Nocera #include <asm/unaligned.h> 25a2233cb7SHans de Goede #include "goodix.h" 26ca96ea86SBastien Nocera 27aebfc52cSHans de Goede #define GOODIX_GPIO_INT_NAME "irq" 28aebfc52cSHans de Goede #define GOODIX_GPIO_RST_NAME "reset" 29aebfc52cSHans de Goede 30aebfc52cSHans de Goede #define GOODIX_MAX_HEIGHT 4096 31aebfc52cSHans de Goede #define GOODIX_MAX_WIDTH 4096 32aebfc52cSHans de Goede #define GOODIX_INT_TRIGGER 1 33aebfc52cSHans de Goede #define GOODIX_CONTACT_SIZE 8 34aebfc52cSHans de Goede #define GOODIX_MAX_CONTACT_SIZE 9 35aebfc52cSHans de Goede #define GOODIX_MAX_CONTACTS 10 36aebfc52cSHans de Goede 37686e8a24SHans de Goede #define GOODIX_CONFIG_MIN_LENGTH 186 38aebfc52cSHans de Goede #define GOODIX_CONFIG_911_LENGTH 186 39aebfc52cSHans de Goede #define GOODIX_CONFIG_967_LENGTH 228 40686e8a24SHans de Goede #define GOODIX_CONFIG_GT9X_LENGTH 240 41aebfc52cSHans de Goede 42aebfc52cSHans de Goede #define GOODIX_BUFFER_STATUS_READY BIT(7) 43492ee52cSDmitry Mastykin #define GOODIX_HAVE_KEY BIT(4) 44aebfc52cSHans de Goede #define GOODIX_BUFFER_STATUS_TIMEOUT 20 45aebfc52cSHans de Goede 46aebfc52cSHans de Goede #define RESOLUTION_LOC 1 47aebfc52cSHans de Goede #define MAX_CONTACTS_LOC 5 48aebfc52cSHans de Goede #define TRIGGER_LOC 6 49aebfc52cSHans de Goede 50c9c20ee3SHans de Goede /* Our special handling for GPIO accesses through ACPI is x86 specific */ 51c9c20ee3SHans de Goede #if defined CONFIG_X86 && defined CONFIG_ACPI 52c9c20ee3SHans de Goede #define ACPI_GPIO_SUPPORT 53c9c20ee3SHans de Goede #endif 54c9c20ee3SHans de Goede 55cae102e2SIcenowy Zheng struct goodix_chip_id { 56cae102e2SIcenowy Zheng const char *id; 57cae102e2SIcenowy Zheng const struct goodix_chip_data *data; 58cae102e2SIcenowy Zheng }; 59cae102e2SIcenowy Zheng 6025309004SMarcin Niestroj static int goodix_check_cfg_8(struct goodix_ts_data *ts, 611a67448fSHans de Goede const u8 *cfg, int len); 6225309004SMarcin Niestroj static int goodix_check_cfg_16(struct goodix_ts_data *ts, 631a67448fSHans de Goede const u8 *cfg, int len); 64de956caeSHans de Goede static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts); 65de956caeSHans de Goede static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts); 6625309004SMarcin Niestroj 6725309004SMarcin Niestroj static const struct goodix_chip_data gt1x_chip_data = { 6825309004SMarcin Niestroj .config_addr = GOODIX_GT1X_REG_CONFIG_DATA, 69686e8a24SHans de Goede .config_len = GOODIX_CONFIG_GT9X_LENGTH, 7025309004SMarcin Niestroj .check_config = goodix_check_cfg_16, 71de956caeSHans de Goede .calc_config_checksum = goodix_calc_cfg_checksum_16, 7225309004SMarcin Niestroj }; 7325309004SMarcin Niestroj 7425309004SMarcin Niestroj static const struct goodix_chip_data gt911_chip_data = { 7525309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 7625309004SMarcin Niestroj .config_len = GOODIX_CONFIG_911_LENGTH, 7725309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 78de956caeSHans de Goede .calc_config_checksum = goodix_calc_cfg_checksum_8, 7925309004SMarcin Niestroj }; 8025309004SMarcin Niestroj 8125309004SMarcin Niestroj static const struct goodix_chip_data gt967_chip_data = { 8225309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 8325309004SMarcin Niestroj .config_len = GOODIX_CONFIG_967_LENGTH, 8425309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 85de956caeSHans de Goede .calc_config_checksum = goodix_calc_cfg_checksum_8, 8625309004SMarcin Niestroj }; 8725309004SMarcin Niestroj 8825309004SMarcin Niestroj static const struct goodix_chip_data gt9x_chip_data = { 8925309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 90686e8a24SHans de Goede .config_len = GOODIX_CONFIG_GT9X_LENGTH, 9125309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 92de956caeSHans de Goede .calc_config_checksum = goodix_calc_cfg_checksum_8, 9325309004SMarcin Niestroj }; 9425309004SMarcin Niestroj 95cae102e2SIcenowy Zheng static const struct goodix_chip_id goodix_chip_ids[] = { 96cae102e2SIcenowy Zheng { .id = "1151", .data = >1x_chip_data }, 97cae102e2SIcenowy Zheng { .id = "5663", .data = >1x_chip_data }, 98cae102e2SIcenowy Zheng { .id = "5688", .data = >1x_chip_data }, 99b5e458afSIcenowy Zheng { .id = "917S", .data = >1x_chip_data }, 1002dce6db7SAngeloGioacchino Del Regno { .id = "9286", .data = >1x_chip_data }, 101cae102e2SIcenowy Zheng 102cae102e2SIcenowy Zheng { .id = "911", .data = >911_chip_data }, 103cae102e2SIcenowy Zheng { .id = "9271", .data = >911_chip_data }, 104cae102e2SIcenowy Zheng { .id = "9110", .data = >911_chip_data }, 105cae102e2SIcenowy Zheng { .id = "927", .data = >911_chip_data }, 106cae102e2SIcenowy Zheng { .id = "928", .data = >911_chip_data }, 107cae102e2SIcenowy Zheng 108cae102e2SIcenowy Zheng { .id = "912", .data = >967_chip_data }, 109b9a1c116SYannick Fertre { .id = "9147", .data = >967_chip_data }, 110cae102e2SIcenowy Zheng { .id = "967", .data = >967_chip_data }, 111cae102e2SIcenowy Zheng { } 112cae102e2SIcenowy Zheng }; 113cae102e2SIcenowy Zheng 114ca96ea86SBastien Nocera static const unsigned long goodix_irq_flags[] = { 115ca96ea86SBastien Nocera IRQ_TYPE_EDGE_RISING, 116ca96ea86SBastien Nocera IRQ_TYPE_EDGE_FALLING, 117ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_LOW, 118ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_HIGH, 119ca96ea86SBastien Nocera }; 120ca96ea86SBastien Nocera 1218b5a359cSBastien Nocera /* 1228b5a359cSBastien Nocera * Those tablets have their coordinates origin at the bottom right 1238b5a359cSBastien Nocera * of the tablet, as if rotated 180 degrees 1248b5a359cSBastien Nocera */ 1258b5a359cSBastien Nocera static const struct dmi_system_id rotated_screen[] = { 1268b5a359cSBastien Nocera #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1278b5a359cSBastien Nocera { 128df5b5e55SHans de Goede .ident = "Teclast X89", 129df5b5e55SHans de Goede .matches = { 130df5b5e55SHans de Goede /* tPAD is too generic, also match on bios date */ 131df5b5e55SHans de Goede DMI_MATCH(DMI_BOARD_VENDOR, "TECLAST"), 132df5b5e55SHans de Goede DMI_MATCH(DMI_BOARD_NAME, "tPAD"), 133df5b5e55SHans de Goede DMI_MATCH(DMI_BIOS_DATE, "12/19/2014"), 134df5b5e55SHans de Goede }, 135df5b5e55SHans de Goede }, 136df5b5e55SHans de Goede { 137cffdd6d9SSimon Beginn .ident = "Teclast X98 Pro", 138cffdd6d9SSimon Beginn .matches = { 139cffdd6d9SSimon Beginn /* 140cffdd6d9SSimon Beginn * Only match BIOS date, because the manufacturers 141cffdd6d9SSimon Beginn * BIOS does not report the board name at all 142cffdd6d9SSimon Beginn * (sometimes)... 143cffdd6d9SSimon Beginn */ 144cffdd6d9SSimon Beginn DMI_MATCH(DMI_BOARD_VENDOR, "TECLAST"), 145cffdd6d9SSimon Beginn DMI_MATCH(DMI_BIOS_DATE, "10/28/2015"), 146cffdd6d9SSimon Beginn }, 147cffdd6d9SSimon Beginn }, 148cffdd6d9SSimon Beginn { 1498b5a359cSBastien Nocera .ident = "WinBook TW100", 1508b5a359cSBastien Nocera .matches = { 1518b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 1528b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW100") 1538b5a359cSBastien Nocera } 1548b5a359cSBastien Nocera }, 1558b5a359cSBastien Nocera { 1568b5a359cSBastien Nocera .ident = "WinBook TW700", 1578b5a359cSBastien Nocera .matches = { 1588b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 1598b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW700") 1608b5a359cSBastien Nocera }, 1618b5a359cSBastien Nocera }, 1628b5a359cSBastien Nocera #endif 1638b5a359cSBastien Nocera {} 1648b5a359cSBastien Nocera }; 1658b5a359cSBastien Nocera 166bd3b8480SYauhen Kharuzhy static const struct dmi_system_id nine_bytes_report[] = { 167bd3b8480SYauhen Kharuzhy #if defined(CONFIG_DMI) && defined(CONFIG_X86) 168bd3b8480SYauhen Kharuzhy { 169bd3b8480SYauhen Kharuzhy .ident = "Lenovo YogaBook", 170bd3b8480SYauhen Kharuzhy /* YB1-X91L/F and YB1-X90L/F */ 171bd3b8480SYauhen Kharuzhy .matches = { 172bd3b8480SYauhen Kharuzhy DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X9") 173bd3b8480SYauhen Kharuzhy } 174bd3b8480SYauhen Kharuzhy }, 175bd3b8480SYauhen Kharuzhy #endif 176bd3b8480SYauhen Kharuzhy {} 177bd3b8480SYauhen Kharuzhy }; 178bd3b8480SYauhen Kharuzhy 1791dd5ddc1SSergei A. Trusov /* 1801dd5ddc1SSergei A. Trusov * Those tablets have their x coordinate inverted 1811dd5ddc1SSergei A. Trusov */ 1821dd5ddc1SSergei A. Trusov static const struct dmi_system_id inverted_x_screen[] = { 1831dd5ddc1SSergei A. Trusov #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1841dd5ddc1SSergei A. Trusov { 1851dd5ddc1SSergei A. Trusov .ident = "Cube I15-TC", 1861dd5ddc1SSergei A. Trusov .matches = { 1871dd5ddc1SSergei A. Trusov DMI_MATCH(DMI_SYS_VENDOR, "Cube"), 1881dd5ddc1SSergei A. Trusov DMI_MATCH(DMI_PRODUCT_NAME, "I15-TC") 1891dd5ddc1SSergei A. Trusov }, 1901dd5ddc1SSergei A. Trusov }, 1911dd5ddc1SSergei A. Trusov #endif 1921dd5ddc1SSergei A. Trusov {} 1931dd5ddc1SSergei A. Trusov }; 1941dd5ddc1SSergei A. Trusov 195ca96ea86SBastien Nocera /** 196ca96ea86SBastien Nocera * goodix_i2c_read - read data from a register of the i2c slave device. 197ca96ea86SBastien Nocera * 198ca96ea86SBastien Nocera * @client: i2c device. 199ca96ea86SBastien Nocera * @reg: the register to read from. 200ca96ea86SBastien Nocera * @buf: raw write data buffer. 201ca96ea86SBastien Nocera * @len: length of the buffer to write 202ca96ea86SBastien Nocera */ 203a2233cb7SHans de Goede int goodix_i2c_read(struct i2c_client *client, u16 reg, u8 *buf, int len) 204ca96ea86SBastien Nocera { 205ca96ea86SBastien Nocera struct i2c_msg msgs[2]; 206fafef982SMarcin Niestroj __be16 wbuf = cpu_to_be16(reg); 207ca96ea86SBastien Nocera int ret; 208ca96ea86SBastien Nocera 209ca96ea86SBastien Nocera msgs[0].flags = 0; 210ca96ea86SBastien Nocera msgs[0].addr = client->addr; 211ca96ea86SBastien Nocera msgs[0].len = 2; 212ca96ea86SBastien Nocera msgs[0].buf = (u8 *)&wbuf; 213ca96ea86SBastien Nocera 214ca96ea86SBastien Nocera msgs[1].flags = I2C_M_RD; 215ca96ea86SBastien Nocera msgs[1].addr = client->addr; 216ca96ea86SBastien Nocera msgs[1].len = len; 217ca96ea86SBastien Nocera msgs[1].buf = buf; 218ca96ea86SBastien Nocera 219ca96ea86SBastien Nocera ret = i2c_transfer(client->adapter, msgs, 2); 2207642f29cSHans de Goede if (ret >= 0) 2217642f29cSHans de Goede ret = (ret == ARRAY_SIZE(msgs) ? 0 : -EIO); 2227642f29cSHans de Goede 2237642f29cSHans de Goede if (ret) 2247642f29cSHans de Goede dev_err(&client->dev, "Error reading %d bytes from 0x%04x: %d\n", 2257642f29cSHans de Goede len, reg, ret); 2267642f29cSHans de Goede return ret; 227ca96ea86SBastien Nocera } 228ca96ea86SBastien Nocera 22968caf858SIrina Tirdea /** 23068caf858SIrina Tirdea * goodix_i2c_write - write data to a register of the i2c slave device. 23168caf858SIrina Tirdea * 23268caf858SIrina Tirdea * @client: i2c device. 23368caf858SIrina Tirdea * @reg: the register to write to. 23468caf858SIrina Tirdea * @buf: raw data buffer to write. 23568caf858SIrina Tirdea * @len: length of the buffer to write 23668caf858SIrina Tirdea */ 237a2233cb7SHans de Goede int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf, int len) 23868caf858SIrina Tirdea { 23968caf858SIrina Tirdea u8 *addr_buf; 24068caf858SIrina Tirdea struct i2c_msg msg; 24168caf858SIrina Tirdea int ret; 24268caf858SIrina Tirdea 24368caf858SIrina Tirdea addr_buf = kmalloc(len + 2, GFP_KERNEL); 24468caf858SIrina Tirdea if (!addr_buf) 24568caf858SIrina Tirdea return -ENOMEM; 24668caf858SIrina Tirdea 24768caf858SIrina Tirdea addr_buf[0] = reg >> 8; 24868caf858SIrina Tirdea addr_buf[1] = reg & 0xFF; 24968caf858SIrina Tirdea memcpy(&addr_buf[2], buf, len); 25068caf858SIrina Tirdea 25168caf858SIrina Tirdea msg.flags = 0; 25268caf858SIrina Tirdea msg.addr = client->addr; 25368caf858SIrina Tirdea msg.buf = addr_buf; 25468caf858SIrina Tirdea msg.len = len + 2; 25568caf858SIrina Tirdea 25668caf858SIrina Tirdea ret = i2c_transfer(client->adapter, &msg, 1); 2577642f29cSHans de Goede if (ret >= 0) 2587642f29cSHans de Goede ret = (ret == 1 ? 0 : -EIO); 2597642f29cSHans de Goede 26068caf858SIrina Tirdea kfree(addr_buf); 2617642f29cSHans de Goede 2627642f29cSHans de Goede if (ret) 2637642f29cSHans de Goede dev_err(&client->dev, "Error writing %d bytes to 0x%04x: %d\n", 2647642f29cSHans de Goede len, reg, ret); 2657642f29cSHans de Goede return ret; 26668caf858SIrina Tirdea } 26768caf858SIrina Tirdea 268a2233cb7SHans de Goede int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value) 2695ab09d6aSIrina Tirdea { 2705ab09d6aSIrina Tirdea return goodix_i2c_write(client, reg, &value, sizeof(value)); 2715ab09d6aSIrina Tirdea } 2725ab09d6aSIrina Tirdea 273cae102e2SIcenowy Zheng static const struct goodix_chip_data *goodix_get_chip_data(const char *id) 274a779fbc6SIrina Tirdea { 275cae102e2SIcenowy Zheng unsigned int i; 27625309004SMarcin Niestroj 277cae102e2SIcenowy Zheng for (i = 0; goodix_chip_ids[i].id; i++) { 278cae102e2SIcenowy Zheng if (!strcmp(goodix_chip_ids[i].id, id)) 279cae102e2SIcenowy Zheng return goodix_chip_ids[i].data; 280a779fbc6SIrina Tirdea } 281cae102e2SIcenowy Zheng 282cae102e2SIcenowy Zheng return >9x_chip_data; 283a779fbc6SIrina Tirdea } 284a779fbc6SIrina Tirdea 285ca96ea86SBastien Nocera static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data) 286ca96ea86SBastien Nocera { 2879b5db7aaSPaul Cercueil unsigned long max_timeout; 288ca96ea86SBastien Nocera int touch_num; 289ca96ea86SBastien Nocera int error; 290492ee52cSDmitry Mastykin u16 addr = GOODIX_READ_COOR_ADDR; 291492ee52cSDmitry Mastykin /* 292492ee52cSDmitry Mastykin * We are going to read 1-byte header, 293492ee52cSDmitry Mastykin * ts->contact_size * max(1, touch_num) bytes of coordinates 294492ee52cSDmitry Mastykin * and 1-byte footer which contains the touch-key code. 295492ee52cSDmitry Mastykin */ 296492ee52cSDmitry Mastykin const int header_contact_keycode_size = 1 + ts->contact_size + 1; 297ca96ea86SBastien Nocera 2989b5db7aaSPaul Cercueil /* 2999b5db7aaSPaul Cercueil * The 'buffer status' bit, which indicates that the data is valid, is 3009b5db7aaSPaul Cercueil * not set as soon as the interrupt is raised, but slightly after. 3019b5db7aaSPaul Cercueil * This takes around 10 ms to happen, so we poll for 20 ms. 3029b5db7aaSPaul Cercueil */ 3039b5db7aaSPaul Cercueil max_timeout = jiffies + msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT); 3049b5db7aaSPaul Cercueil do { 305492ee52cSDmitry Mastykin error = goodix_i2c_read(ts->client, addr, data, 306492ee52cSDmitry Mastykin header_contact_keycode_size); 3077642f29cSHans de Goede if (error) 308ca96ea86SBastien Nocera return error; 309ca96ea86SBastien Nocera 3109b5db7aaSPaul Cercueil if (data[0] & GOODIX_BUFFER_STATUS_READY) { 311ca96ea86SBastien Nocera touch_num = data[0] & 0x0f; 312a7ac7c95SAleksei Mamlin if (touch_num > ts->max_touch_num) 313ca96ea86SBastien Nocera return -EPROTO; 314ca96ea86SBastien Nocera 315ca96ea86SBastien Nocera if (touch_num > 1) { 316492ee52cSDmitry Mastykin addr += header_contact_keycode_size; 317492ee52cSDmitry Mastykin data += header_contact_keycode_size; 318ca96ea86SBastien Nocera error = goodix_i2c_read(ts->client, 319492ee52cSDmitry Mastykin addr, data, 320bd3b8480SYauhen Kharuzhy ts->contact_size * 3219b5db7aaSPaul Cercueil (touch_num - 1)); 322ca96ea86SBastien Nocera if (error) 323ca96ea86SBastien Nocera return error; 324ca96ea86SBastien Nocera } 325ca96ea86SBastien Nocera 326ca96ea86SBastien Nocera return touch_num; 327ca96ea86SBastien Nocera } 328ca96ea86SBastien Nocera 329*09182ed2SHans de Goede if (data[0] == 0 && ts->firmware_name) { 330*09182ed2SHans de Goede if (goodix_handle_fw_request(ts)) 331*09182ed2SHans de Goede return 0; 332*09182ed2SHans de Goede } 333*09182ed2SHans de Goede 3349b5db7aaSPaul Cercueil usleep_range(1000, 2000); /* Poll every 1 - 2 ms */ 3359b5db7aaSPaul Cercueil } while (time_before(jiffies, max_timeout)); 3369b5db7aaSPaul Cercueil 3379b5db7aaSPaul Cercueil /* 3389b5db7aaSPaul Cercueil * The Goodix panel will send spurious interrupts after a 3399b5db7aaSPaul Cercueil * 'finger up' event, which will always cause a timeout. 3409b5db7aaSPaul Cercueil */ 34124ef83f6SDmitry Mastykin return -ENOMSG; 3429b5db7aaSPaul Cercueil } 3439b5db7aaSPaul Cercueil 344bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_8b(struct goodix_ts_data *ts, u8 *coor_data) 345ca96ea86SBastien Nocera { 346ca96ea86SBastien Nocera int id = coor_data[0] & 0x0F; 347ca96ea86SBastien Nocera int input_x = get_unaligned_le16(&coor_data[1]); 348ca96ea86SBastien Nocera int input_y = get_unaligned_le16(&coor_data[3]); 349ca96ea86SBastien Nocera int input_w = get_unaligned_le16(&coor_data[5]); 350ca96ea86SBastien Nocera 351ca96ea86SBastien Nocera input_mt_slot(ts->input_dev, id); 352ca96ea86SBastien Nocera input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 353fafef982SMarcin Niestroj touchscreen_report_pos(ts->input_dev, &ts->prop, 354fafef982SMarcin Niestroj input_x, input_y, true); 355ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 356ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 357ca96ea86SBastien Nocera } 358ca96ea86SBastien Nocera 359bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_9b(struct goodix_ts_data *ts, u8 *coor_data) 360bd3b8480SYauhen Kharuzhy { 361bd3b8480SYauhen Kharuzhy int id = coor_data[1] & 0x0F; 362bd3b8480SYauhen Kharuzhy int input_x = get_unaligned_le16(&coor_data[3]); 363bd3b8480SYauhen Kharuzhy int input_y = get_unaligned_le16(&coor_data[5]); 364bd3b8480SYauhen Kharuzhy int input_w = get_unaligned_le16(&coor_data[7]); 365bd3b8480SYauhen Kharuzhy 366bd3b8480SYauhen Kharuzhy input_mt_slot(ts->input_dev, id); 367bd3b8480SYauhen Kharuzhy input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 368bd3b8480SYauhen Kharuzhy touchscreen_report_pos(ts->input_dev, &ts->prop, 369bd3b8480SYauhen Kharuzhy input_x, input_y, true); 370bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 371bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 372bd3b8480SYauhen Kharuzhy } 373bd3b8480SYauhen Kharuzhy 374492ee52cSDmitry Mastykin static void goodix_ts_report_key(struct goodix_ts_data *ts, u8 *data) 375492ee52cSDmitry Mastykin { 376492ee52cSDmitry Mastykin int touch_num; 377492ee52cSDmitry Mastykin u8 key_value; 378492ee52cSDmitry Mastykin int i; 379492ee52cSDmitry Mastykin 380492ee52cSDmitry Mastykin if (data[0] & GOODIX_HAVE_KEY) { 381492ee52cSDmitry Mastykin touch_num = data[0] & 0x0f; 382492ee52cSDmitry Mastykin key_value = data[1 + ts->contact_size * touch_num]; 383492ee52cSDmitry Mastykin for (i = 0; i < GOODIX_MAX_KEYS; i++) 384492ee52cSDmitry Mastykin if (key_value & BIT(i)) 385492ee52cSDmitry Mastykin input_report_key(ts->input_dev, 386492ee52cSDmitry Mastykin ts->keymap[i], 1); 387492ee52cSDmitry Mastykin } else { 388492ee52cSDmitry Mastykin for (i = 0; i < GOODIX_MAX_KEYS; i++) 389492ee52cSDmitry Mastykin input_report_key(ts->input_dev, ts->keymap[i], 0); 390492ee52cSDmitry Mastykin } 391492ee52cSDmitry Mastykin } 392492ee52cSDmitry Mastykin 393ca96ea86SBastien Nocera /** 394ca96ea86SBastien Nocera * goodix_process_events - Process incoming events 395ca96ea86SBastien Nocera * 396ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 397ca96ea86SBastien Nocera * 398ca96ea86SBastien Nocera * Called when the IRQ is triggered. Read the current device state, and push 399ca96ea86SBastien Nocera * the input events to the user space. 400ca96ea86SBastien Nocera */ 401ca96ea86SBastien Nocera static void goodix_process_events(struct goodix_ts_data *ts) 402ca96ea86SBastien Nocera { 403492ee52cSDmitry Mastykin u8 point_data[2 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS]; 404ca96ea86SBastien Nocera int touch_num; 405ca96ea86SBastien Nocera int i; 406ca96ea86SBastien Nocera 407ca96ea86SBastien Nocera touch_num = goodix_ts_read_input_report(ts, point_data); 408ca96ea86SBastien Nocera if (touch_num < 0) 409ca96ea86SBastien Nocera return; 410ca96ea86SBastien Nocera 411492ee52cSDmitry Mastykin goodix_ts_report_key(ts, point_data); 4124a54feeaSSergei A. Trusov 413ca96ea86SBastien Nocera for (i = 0; i < touch_num; i++) 414bd3b8480SYauhen Kharuzhy if (ts->contact_size == 9) 415bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_9b(ts, 416bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 417bd3b8480SYauhen Kharuzhy else 418bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_8b(ts, 419bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 420ca96ea86SBastien Nocera 421ca96ea86SBastien Nocera input_mt_sync_frame(ts->input_dev); 422ca96ea86SBastien Nocera input_sync(ts->input_dev); 423ca96ea86SBastien Nocera } 424ca96ea86SBastien Nocera 425ca96ea86SBastien Nocera /** 426ca96ea86SBastien Nocera * goodix_ts_irq_handler - The IRQ handler 427ca96ea86SBastien Nocera * 428ca96ea86SBastien Nocera * @irq: interrupt number. 429ca96ea86SBastien Nocera * @dev_id: private data pointer. 430ca96ea86SBastien Nocera */ 431ca96ea86SBastien Nocera static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id) 432ca96ea86SBastien Nocera { 433ca96ea86SBastien Nocera struct goodix_ts_data *ts = dev_id; 434ca96ea86SBastien Nocera 435ca96ea86SBastien Nocera goodix_process_events(ts); 4367642f29cSHans de Goede goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0); 437ca96ea86SBastien Nocera 438ca96ea86SBastien Nocera return IRQ_HANDLED; 439ca96ea86SBastien Nocera } 440ca96ea86SBastien Nocera 4415ab09d6aSIrina Tirdea static void goodix_free_irq(struct goodix_ts_data *ts) 4425ab09d6aSIrina Tirdea { 4435ab09d6aSIrina Tirdea devm_free_irq(&ts->client->dev, ts->client->irq, ts); 4445ab09d6aSIrina Tirdea } 4455ab09d6aSIrina Tirdea 4465ab09d6aSIrina Tirdea static int goodix_request_irq(struct goodix_ts_data *ts) 4475ab09d6aSIrina Tirdea { 4485ab09d6aSIrina Tirdea return devm_request_threaded_irq(&ts->client->dev, ts->client->irq, 4495ab09d6aSIrina Tirdea NULL, goodix_ts_irq_handler, 4505ab09d6aSIrina Tirdea ts->irq_flags, ts->client->name, ts); 4515ab09d6aSIrina Tirdea } 4525ab09d6aSIrina Tirdea 4531a67448fSHans de Goede static int goodix_check_cfg_8(struct goodix_ts_data *ts, const u8 *cfg, int len) 45468caf858SIrina Tirdea { 4551a67448fSHans de Goede int i, raw_cfg_len = len - 2; 45668caf858SIrina Tirdea u8 check_sum = 0; 45768caf858SIrina Tirdea 45868caf858SIrina Tirdea for (i = 0; i < raw_cfg_len; i++) 4591a67448fSHans de Goede check_sum += cfg[i]; 46068caf858SIrina Tirdea check_sum = (~check_sum) + 1; 4611a67448fSHans de Goede if (check_sum != cfg[raw_cfg_len]) { 46268caf858SIrina Tirdea dev_err(&ts->client->dev, 46368caf858SIrina Tirdea "The checksum of the config fw is not correct"); 46468caf858SIrina Tirdea return -EINVAL; 46568caf858SIrina Tirdea } 46668caf858SIrina Tirdea 4671a67448fSHans de Goede if (cfg[raw_cfg_len + 1] != 1) { 46868caf858SIrina Tirdea dev_err(&ts->client->dev, 46968caf858SIrina Tirdea "Config fw must have Config_Fresh register set"); 47068caf858SIrina Tirdea return -EINVAL; 47168caf858SIrina Tirdea } 47268caf858SIrina Tirdea 47368caf858SIrina Tirdea return 0; 47468caf858SIrina Tirdea } 47568caf858SIrina Tirdea 476de956caeSHans de Goede static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts) 477de956caeSHans de Goede { 478de956caeSHans de Goede int i, raw_cfg_len = ts->chip->config_len - 2; 479de956caeSHans de Goede u8 check_sum = 0; 480de956caeSHans de Goede 481de956caeSHans de Goede for (i = 0; i < raw_cfg_len; i++) 482de956caeSHans de Goede check_sum += ts->config[i]; 483de956caeSHans de Goede check_sum = (~check_sum) + 1; 484de956caeSHans de Goede 485de956caeSHans de Goede ts->config[raw_cfg_len] = check_sum; 486de956caeSHans de Goede ts->config[raw_cfg_len + 1] = 1; /* Set "config_fresh" bit */ 487de956caeSHans de Goede } 488de956caeSHans de Goede 4891a67448fSHans de Goede static int goodix_check_cfg_16(struct goodix_ts_data *ts, const u8 *cfg, 4901a67448fSHans de Goede int len) 49125309004SMarcin Niestroj { 4921a67448fSHans de Goede int i, raw_cfg_len = len - 3; 49325309004SMarcin Niestroj u16 check_sum = 0; 49425309004SMarcin Niestroj 49525309004SMarcin Niestroj for (i = 0; i < raw_cfg_len; i += 2) 4961a67448fSHans de Goede check_sum += get_unaligned_be16(&cfg[i]); 49725309004SMarcin Niestroj check_sum = (~check_sum) + 1; 4981a67448fSHans de Goede if (check_sum != get_unaligned_be16(&cfg[raw_cfg_len])) { 49925309004SMarcin Niestroj dev_err(&ts->client->dev, 50025309004SMarcin Niestroj "The checksum of the config fw is not correct"); 50125309004SMarcin Niestroj return -EINVAL; 50225309004SMarcin Niestroj } 50325309004SMarcin Niestroj 5041a67448fSHans de Goede if (cfg[raw_cfg_len + 2] != 1) { 50525309004SMarcin Niestroj dev_err(&ts->client->dev, 50625309004SMarcin Niestroj "Config fw must have Config_Fresh register set"); 50725309004SMarcin Niestroj return -EINVAL; 50825309004SMarcin Niestroj } 50925309004SMarcin Niestroj 51025309004SMarcin Niestroj return 0; 51125309004SMarcin Niestroj } 51225309004SMarcin Niestroj 513de956caeSHans de Goede static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts) 514de956caeSHans de Goede { 515de956caeSHans de Goede int i, raw_cfg_len = ts->chip->config_len - 3; 516de956caeSHans de Goede u16 check_sum = 0; 517de956caeSHans de Goede 518de956caeSHans de Goede for (i = 0; i < raw_cfg_len; i += 2) 519de956caeSHans de Goede check_sum += get_unaligned_be16(&ts->config[i]); 520de956caeSHans de Goede check_sum = (~check_sum) + 1; 521de956caeSHans de Goede 522de956caeSHans de Goede put_unaligned_be16(check_sum, &ts->config[raw_cfg_len]); 523de956caeSHans de Goede ts->config[raw_cfg_len + 2] = 1; /* Set "config_fresh" bit */ 524de956caeSHans de Goede } 525de956caeSHans de Goede 52625309004SMarcin Niestroj /** 52725309004SMarcin Niestroj * goodix_check_cfg - Checks if config fw is valid 52825309004SMarcin Niestroj * 52925309004SMarcin Niestroj * @ts: goodix_ts_data pointer 53025309004SMarcin Niestroj * @cfg: firmware config data 531cb690465SLee Jones * @len: config data length 53225309004SMarcin Niestroj */ 5331a67448fSHans de Goede static int goodix_check_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) 53425309004SMarcin Niestroj { 5351a67448fSHans de Goede if (len < GOODIX_CONFIG_MIN_LENGTH || 5361a67448fSHans de Goede len > GOODIX_CONFIG_MAX_LENGTH) { 53725309004SMarcin Niestroj dev_err(&ts->client->dev, 53825309004SMarcin Niestroj "The length of the config fw is not correct"); 53925309004SMarcin Niestroj return -EINVAL; 54025309004SMarcin Niestroj } 54125309004SMarcin Niestroj 5421a67448fSHans de Goede return ts->chip->check_config(ts, cfg, len); 54325309004SMarcin Niestroj } 54425309004SMarcin Niestroj 54568caf858SIrina Tirdea /** 54668caf858SIrina Tirdea * goodix_send_cfg - Write fw config to device 54768caf858SIrina Tirdea * 54868caf858SIrina Tirdea * @ts: goodix_ts_data pointer 54968caf858SIrina Tirdea * @cfg: config firmware to write to device 550cb690465SLee Jones * @len: config data length 55168caf858SIrina Tirdea */ 552a2233cb7SHans de Goede int goodix_send_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) 55368caf858SIrina Tirdea { 55468caf858SIrina Tirdea int error; 55568caf858SIrina Tirdea 5561a67448fSHans de Goede error = goodix_check_cfg(ts, cfg, len); 55768caf858SIrina Tirdea if (error) 55868caf858SIrina Tirdea return error; 55968caf858SIrina Tirdea 5601a67448fSHans de Goede error = goodix_i2c_write(ts->client, ts->chip->config_addr, cfg, len); 5617642f29cSHans de Goede if (error) 56268caf858SIrina Tirdea return error; 5637642f29cSHans de Goede 56468caf858SIrina Tirdea dev_dbg(&ts->client->dev, "Config sent successfully."); 56568caf858SIrina Tirdea 56668caf858SIrina Tirdea /* Let the firmware reconfigure itself, so sleep for 10ms */ 56768caf858SIrina Tirdea usleep_range(10000, 11000); 56868caf858SIrina Tirdea 56968caf858SIrina Tirdea return 0; 57068caf858SIrina Tirdea } 57168caf858SIrina Tirdea 572c9c20ee3SHans de Goede #ifdef ACPI_GPIO_SUPPORT 573c9c20ee3SHans de Goede static int goodix_pin_acpi_direction_input(struct goodix_ts_data *ts) 57449db3997SHans de Goede { 575c9c20ee3SHans de Goede acpi_handle handle = ACPI_HANDLE(&ts->client->dev); 576c5fca485SHans de Goede acpi_status status; 577c5fca485SHans de Goede 578c9c20ee3SHans de Goede status = acpi_evaluate_object(handle, "INTI", NULL, NULL); 579c9c20ee3SHans de Goede return ACPI_SUCCESS(status) ? 0 : -EIO; 580c9c20ee3SHans de Goede } 581c9c20ee3SHans de Goede 582c9c20ee3SHans de Goede static int goodix_pin_acpi_output_method(struct goodix_ts_data *ts, int value) 583c9c20ee3SHans de Goede { 584c9c20ee3SHans de Goede acpi_handle handle = ACPI_HANDLE(&ts->client->dev); 585c9c20ee3SHans de Goede acpi_status status; 586c9c20ee3SHans de Goede 587c9c20ee3SHans de Goede status = acpi_execute_simple_method(handle, "INTO", value); 588c9c20ee3SHans de Goede return ACPI_SUCCESS(status) ? 0 : -EIO; 589c9c20ee3SHans de Goede } 590c9c20ee3SHans de Goede #else 591c9c20ee3SHans de Goede static int goodix_pin_acpi_direction_input(struct goodix_ts_data *ts) 592c9c20ee3SHans de Goede { 593c9c20ee3SHans de Goede dev_err(&ts->client->dev, 594c9c20ee3SHans de Goede "%s called on device without ACPI support\n", __func__); 595c9c20ee3SHans de Goede return -EINVAL; 596c9c20ee3SHans de Goede } 597c9c20ee3SHans de Goede 598c9c20ee3SHans de Goede static int goodix_pin_acpi_output_method(struct goodix_ts_data *ts, int value) 599c9c20ee3SHans de Goede { 600c9c20ee3SHans de Goede dev_err(&ts->client->dev, 601c9c20ee3SHans de Goede "%s called on device without ACPI support\n", __func__); 602c9c20ee3SHans de Goede return -EINVAL; 603c9c20ee3SHans de Goede } 604c9c20ee3SHans de Goede #endif 605c9c20ee3SHans de Goede 606c9c20ee3SHans de Goede static int goodix_irq_direction_output(struct goodix_ts_data *ts, int value) 607c9c20ee3SHans de Goede { 60849db3997SHans de Goede switch (ts->irq_pin_access_method) { 60949db3997SHans de Goede case IRQ_PIN_ACCESS_NONE: 61049db3997SHans de Goede dev_err(&ts->client->dev, 61149db3997SHans de Goede "%s called without an irq_pin_access_method set\n", 61249db3997SHans de Goede __func__); 61349db3997SHans de Goede return -EINVAL; 61449db3997SHans de Goede case IRQ_PIN_ACCESS_GPIO: 61549db3997SHans de Goede return gpiod_direction_output(ts->gpiod_int, value); 616a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 617a7d4b171SHans de Goede /* 618a7d4b171SHans de Goede * The IRQ pin triggers on a falling edge, so its gets marked 619a7d4b171SHans de Goede * as active-low, use output_raw to avoid the value inversion. 620a7d4b171SHans de Goede */ 621a7d4b171SHans de Goede return gpiod_direction_output_raw(ts->gpiod_int, value); 622c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 623c9c20ee3SHans de Goede return goodix_pin_acpi_output_method(ts, value); 62449db3997SHans de Goede } 62549db3997SHans de Goede 62649db3997SHans de Goede return -EINVAL; /* Never reached */ 62749db3997SHans de Goede } 62849db3997SHans de Goede 62949db3997SHans de Goede static int goodix_irq_direction_input(struct goodix_ts_data *ts) 63049db3997SHans de Goede { 63149db3997SHans de Goede switch (ts->irq_pin_access_method) { 63249db3997SHans de Goede case IRQ_PIN_ACCESS_NONE: 63349db3997SHans de Goede dev_err(&ts->client->dev, 63449db3997SHans de Goede "%s called without an irq_pin_access_method set\n", 63549db3997SHans de Goede __func__); 63649db3997SHans de Goede return -EINVAL; 63749db3997SHans de Goede case IRQ_PIN_ACCESS_GPIO: 638c9c20ee3SHans de Goede return gpiod_direction_input(ts->gpiod_int); 639a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 64049db3997SHans de Goede return gpiod_direction_input(ts->gpiod_int); 641c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 642c9c20ee3SHans de Goede return goodix_pin_acpi_direction_input(ts); 64349db3997SHans de Goede } 64449db3997SHans de Goede 64549db3997SHans de Goede return -EINVAL; /* Never reached */ 64649db3997SHans de Goede } 64749db3997SHans de Goede 648a2233cb7SHans de Goede int goodix_int_sync(struct goodix_ts_data *ts) 649ec6e1b40SIrina Tirdea { 650ec6e1b40SIrina Tirdea int error; 651ec6e1b40SIrina Tirdea 65249db3997SHans de Goede error = goodix_irq_direction_output(ts, 0); 653ec6e1b40SIrina Tirdea if (error) 654209bda47SHans de Goede goto error; 655ec6e1b40SIrina Tirdea 656ec6e1b40SIrina Tirdea msleep(50); /* T5: 50ms */ 657ec6e1b40SIrina Tirdea 65849db3997SHans de Goede error = goodix_irq_direction_input(ts); 659ec6e1b40SIrina Tirdea if (error) 660209bda47SHans de Goede goto error; 661ec6e1b40SIrina Tirdea 662ec6e1b40SIrina Tirdea return 0; 663209bda47SHans de Goede 664209bda47SHans de Goede error: 665209bda47SHans de Goede dev_err(&ts->client->dev, "Controller irq sync failed.\n"); 666209bda47SHans de Goede return error; 667209bda47SHans de Goede } 668209bda47SHans de Goede 669209bda47SHans de Goede /** 670209bda47SHans de Goede * goodix_reset_no_int_sync - Reset device, leaving interrupt line in output mode 671209bda47SHans de Goede * 672209bda47SHans de Goede * @ts: goodix_ts_data pointer 673209bda47SHans de Goede */ 674209bda47SHans de Goede int goodix_reset_no_int_sync(struct goodix_ts_data *ts) 675209bda47SHans de Goede { 676209bda47SHans de Goede int error; 677209bda47SHans de Goede 678209bda47SHans de Goede /* begin select I2C slave addr */ 679209bda47SHans de Goede error = gpiod_direction_output(ts->gpiod_rst, 0); 680209bda47SHans de Goede if (error) 681209bda47SHans de Goede goto error; 682209bda47SHans de Goede 683209bda47SHans de Goede msleep(20); /* T2: > 10ms */ 684209bda47SHans de Goede 685209bda47SHans de Goede /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */ 686209bda47SHans de Goede error = goodix_irq_direction_output(ts, ts->client->addr == 0x14); 687209bda47SHans de Goede if (error) 688209bda47SHans de Goede goto error; 689209bda47SHans de Goede 690209bda47SHans de Goede usleep_range(100, 2000); /* T3: > 100us */ 691209bda47SHans de Goede 692209bda47SHans de Goede error = gpiod_direction_output(ts->gpiod_rst, 1); 693209bda47SHans de Goede if (error) 694209bda47SHans de Goede goto error; 695209bda47SHans de Goede 696209bda47SHans de Goede usleep_range(6000, 10000); /* T4: > 5ms */ 697209bda47SHans de Goede 698209bda47SHans de Goede /* end select I2C slave addr */ 699209bda47SHans de Goede error = gpiod_direction_input(ts->gpiod_rst); 700209bda47SHans de Goede if (error) 701209bda47SHans de Goede goto error; 702209bda47SHans de Goede 703209bda47SHans de Goede return 0; 704209bda47SHans de Goede 705209bda47SHans de Goede error: 706209bda47SHans de Goede dev_err(&ts->client->dev, "Controller reset failed.\n"); 707209bda47SHans de Goede return error; 708ec6e1b40SIrina Tirdea } 709ec6e1b40SIrina Tirdea 710ec6e1b40SIrina Tirdea /** 711ec6e1b40SIrina Tirdea * goodix_reset - Reset device during power on 712ec6e1b40SIrina Tirdea * 713ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 714ec6e1b40SIrina Tirdea */ 715ec6e1b40SIrina Tirdea static int goodix_reset(struct goodix_ts_data *ts) 716ec6e1b40SIrina Tirdea { 717ec6e1b40SIrina Tirdea int error; 718ec6e1b40SIrina Tirdea 719209bda47SHans de Goede error = goodix_reset_no_int_sync(ts); 720ec6e1b40SIrina Tirdea if (error) 721ec6e1b40SIrina Tirdea return error; 722ec6e1b40SIrina Tirdea 723209bda47SHans de Goede return goodix_int_sync(ts); 724ec6e1b40SIrina Tirdea } 725ec6e1b40SIrina Tirdea 726c9c20ee3SHans de Goede #ifdef ACPI_GPIO_SUPPORT 72767abd9eeSHans de Goede #include <asm/cpu_device_id.h> 72867abd9eeSHans de Goede #include <asm/intel-family.h> 72967abd9eeSHans de Goede 73067abd9eeSHans de Goede static const struct x86_cpu_id baytrail_cpu_ids[] = { 73167abd9eeSHans de Goede { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT, X86_FEATURE_ANY, }, 73267abd9eeSHans de Goede {} 73367abd9eeSHans de Goede }; 73467abd9eeSHans de Goede 73567abd9eeSHans de Goede static inline bool is_byt(void) 73667abd9eeSHans de Goede { 73767abd9eeSHans de Goede const struct x86_cpu_id *id = x86_match_cpu(baytrail_cpu_ids); 73867abd9eeSHans de Goede 73967abd9eeSHans de Goede return !!id; 74067abd9eeSHans de Goede } 74167abd9eeSHans de Goede 742a7d4b171SHans de Goede static const struct acpi_gpio_params first_gpio = { 0, 0, false }; 743a7d4b171SHans de Goede static const struct acpi_gpio_params second_gpio = { 1, 0, false }; 744a7d4b171SHans de Goede 745a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_first_gpios[] = { 746a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &first_gpio, 1 }, 747a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &second_gpio, 1 }, 748a7d4b171SHans de Goede { }, 749a7d4b171SHans de Goede }; 750a7d4b171SHans de Goede 751a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_last_gpios[] = { 752a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 753a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &second_gpio, 1 }, 754a7d4b171SHans de Goede { }, 755a7d4b171SHans de Goede }; 756a7d4b171SHans de Goede 757c5fca485SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_reset_only_gpios[] = { 758c5fca485SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 759c5fca485SHans de Goede { }, 760c5fca485SHans de Goede }; 761c5fca485SHans de Goede 762a7d4b171SHans de Goede static int goodix_resource(struct acpi_resource *ares, void *data) 763a7d4b171SHans de Goede { 764a7d4b171SHans de Goede struct goodix_ts_data *ts = data; 765a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 766a7d4b171SHans de Goede struct acpi_resource_gpio *gpio; 767a7d4b171SHans de Goede 768a7d4b171SHans de Goede switch (ares->type) { 769a7d4b171SHans de Goede case ACPI_RESOURCE_TYPE_GPIO: 770a7d4b171SHans de Goede gpio = &ares->data.gpio; 771a7d4b171SHans de Goede if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { 772a7d4b171SHans de Goede if (ts->gpio_int_idx == -1) { 773a7d4b171SHans de Goede ts->gpio_int_idx = ts->gpio_count; 774a7d4b171SHans de Goede } else { 775a7d4b171SHans de Goede dev_err(dev, "More then one GpioInt resource, ignoring ACPI GPIO resources\n"); 776a7d4b171SHans de Goede ts->gpio_int_idx = -2; 777a7d4b171SHans de Goede } 778a7d4b171SHans de Goede } 779a7d4b171SHans de Goede ts->gpio_count++; 780a7d4b171SHans de Goede break; 781a7d4b171SHans de Goede default: 782a7d4b171SHans de Goede break; 783a7d4b171SHans de Goede } 784a7d4b171SHans de Goede 785a7d4b171SHans de Goede return 0; 786a7d4b171SHans de Goede } 787a7d4b171SHans de Goede 788a7d4b171SHans de Goede /* 789a7d4b171SHans de Goede * This function gets called in case we fail to get the irq GPIO directly 790a7d4b171SHans de Goede * because the ACPI tables lack GPIO-name to APCI _CRS index mappings 791a7d4b171SHans de Goede * (no _DSD UUID daffd814-6eba-4d8c-8a91-bc9bbf4aa301 data). 792a7d4b171SHans de Goede * In that case we add our own mapping and then goodix_get_gpio_config() 793a7d4b171SHans de Goede * retries to get the GPIOs based on the added mapping. 794a7d4b171SHans de Goede */ 795a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 796a7d4b171SHans de Goede { 797a7d4b171SHans de Goede const struct acpi_gpio_mapping *gpio_mapping = NULL; 798a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 799a7d4b171SHans de Goede LIST_HEAD(resources); 800a7d4b171SHans de Goede int ret; 801a7d4b171SHans de Goede 802a7d4b171SHans de Goede ts->gpio_count = 0; 803a7d4b171SHans de Goede ts->gpio_int_idx = -1; 804a7d4b171SHans de Goede ret = acpi_dev_get_resources(ACPI_COMPANION(dev), &resources, 805a7d4b171SHans de Goede goodix_resource, ts); 806a7d4b171SHans de Goede if (ret < 0) { 807a7d4b171SHans de Goede dev_err(dev, "Error getting ACPI resources: %d\n", ret); 808a7d4b171SHans de Goede return ret; 809a7d4b171SHans de Goede } 810a7d4b171SHans de Goede 811a7d4b171SHans de Goede acpi_dev_free_resource_list(&resources); 812a7d4b171SHans de Goede 813a7d4b171SHans de Goede if (ts->gpio_count == 2 && ts->gpio_int_idx == 0) { 814a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 815a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_first_gpios; 816a7d4b171SHans de Goede } else if (ts->gpio_count == 2 && ts->gpio_int_idx == 1) { 817a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 818a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_last_gpios; 819c5fca485SHans de Goede } else if (ts->gpio_count == 1 && ts->gpio_int_idx == -1 && 820c5fca485SHans de Goede acpi_has_method(ACPI_HANDLE(dev), "INTI") && 821c5fca485SHans de Goede acpi_has_method(ACPI_HANDLE(dev), "INTO")) { 822c5fca485SHans de Goede dev_info(dev, "Using ACPI INTI and INTO methods for IRQ pin access\n"); 823c5fca485SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_METHOD; 824c5fca485SHans de Goede gpio_mapping = acpi_goodix_reset_only_gpios; 82567abd9eeSHans de Goede } else if (is_byt() && ts->gpio_count == 2 && ts->gpio_int_idx == -1) { 82667abd9eeSHans de Goede dev_info(dev, "No ACPI GpioInt resource, assuming that the GPIO order is reset, int\n"); 82767abd9eeSHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 82867abd9eeSHans de Goede gpio_mapping = acpi_goodix_int_last_gpios; 829a7d4b171SHans de Goede } else { 830a7d4b171SHans de Goede dev_warn(dev, "Unexpected ACPI resources: gpio_count %d, gpio_int_idx %d\n", 831a7d4b171SHans de Goede ts->gpio_count, ts->gpio_int_idx); 832a7d4b171SHans de Goede return -EINVAL; 833a7d4b171SHans de Goede } 834a7d4b171SHans de Goede 835a7d4b171SHans de Goede return devm_acpi_dev_add_driver_gpios(dev, gpio_mapping); 836a7d4b171SHans de Goede } 837a7d4b171SHans de Goede #else 838a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 839a7d4b171SHans de Goede { 840a7d4b171SHans de Goede return -EINVAL; 841a7d4b171SHans de Goede } 842a7d4b171SHans de Goede #endif /* CONFIG_X86 && CONFIG_ACPI */ 843a7d4b171SHans de Goede 844ec6e1b40SIrina Tirdea /** 845ec6e1b40SIrina Tirdea * goodix_get_gpio_config - Get GPIO config from ACPI/DT 846ec6e1b40SIrina Tirdea * 847ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 848ec6e1b40SIrina Tirdea */ 849ec6e1b40SIrina Tirdea static int goodix_get_gpio_config(struct goodix_ts_data *ts) 850ec6e1b40SIrina Tirdea { 851ec6e1b40SIrina Tirdea int error; 852ec6e1b40SIrina Tirdea struct device *dev; 853ec6e1b40SIrina Tirdea struct gpio_desc *gpiod; 854a7d4b171SHans de Goede bool added_acpi_mappings = false; 855ec6e1b40SIrina Tirdea 856ec6e1b40SIrina Tirdea if (!ts->client) 857ec6e1b40SIrina Tirdea return -EINVAL; 858ec6e1b40SIrina Tirdea dev = &ts->client->dev; 859ec6e1b40SIrina Tirdea 860ae97fb58SJagan Teki ts->avdd28 = devm_regulator_get(dev, "AVDD28"); 861ae97fb58SJagan Teki if (IS_ERR(ts->avdd28)) { 862ae97fb58SJagan Teki error = PTR_ERR(ts->avdd28); 863ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 864ae97fb58SJagan Teki dev_err(dev, 865ae97fb58SJagan Teki "Failed to get AVDD28 regulator: %d\n", error); 866ae97fb58SJagan Teki return error; 867ae97fb58SJagan Teki } 868ae97fb58SJagan Teki 869ae97fb58SJagan Teki ts->vddio = devm_regulator_get(dev, "VDDIO"); 870ae97fb58SJagan Teki if (IS_ERR(ts->vddio)) { 871ae97fb58SJagan Teki error = PTR_ERR(ts->vddio); 872ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 873ae97fb58SJagan Teki dev_err(dev, 874ae97fb58SJagan Teki "Failed to get VDDIO regulator: %d\n", error); 875ae97fb58SJagan Teki return error; 876ae97fb58SJagan Teki } 877ae97fb58SJagan Teki 878a7d4b171SHans de Goede retry_get_irq_gpio: 879ec6e1b40SIrina Tirdea /* Get the interrupt GPIO pin number */ 880ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN); 881ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 882ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 883ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 884ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 885ec6e1b40SIrina Tirdea GOODIX_GPIO_INT_NAME, error); 886ec6e1b40SIrina Tirdea return error; 887ec6e1b40SIrina Tirdea } 888a7d4b171SHans de Goede if (!gpiod && has_acpi_companion(dev) && !added_acpi_mappings) { 889a7d4b171SHans de Goede added_acpi_mappings = true; 890a7d4b171SHans de Goede if (goodix_add_acpi_gpio_mappings(ts) == 0) 891a7d4b171SHans de Goede goto retry_get_irq_gpio; 892a7d4b171SHans de Goede } 893ec6e1b40SIrina Tirdea 894ec6e1b40SIrina Tirdea ts->gpiod_int = gpiod; 895ec6e1b40SIrina Tirdea 896ec6e1b40SIrina Tirdea /* Get the reset line GPIO pin number */ 897ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, GPIOD_IN); 898ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 899ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 900ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 901ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 902ec6e1b40SIrina Tirdea GOODIX_GPIO_RST_NAME, error); 903ec6e1b40SIrina Tirdea return error; 904ec6e1b40SIrina Tirdea } 905ec6e1b40SIrina Tirdea 906ec6e1b40SIrina Tirdea ts->gpiod_rst = gpiod; 907ec6e1b40SIrina Tirdea 908a7d4b171SHans de Goede switch (ts->irq_pin_access_method) { 909a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 910a7d4b171SHans de Goede /* 911a7d4b171SHans de Goede * We end up here if goodix_add_acpi_gpio_mappings() has 912a7d4b171SHans de Goede * called devm_acpi_dev_add_driver_gpios() because the ACPI 913a7d4b171SHans de Goede * tables did not contain name to index mappings. 914a7d4b171SHans de Goede * Check that we successfully got both GPIOs after we've 915a7d4b171SHans de Goede * added our own acpi_gpio_mapping and if we did not get both 916a7d4b171SHans de Goede * GPIOs reset irq_pin_access_method to IRQ_PIN_ACCESS_NONE. 917a7d4b171SHans de Goede */ 918a7d4b171SHans de Goede if (!ts->gpiod_int || !ts->gpiod_rst) 919a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 920a7d4b171SHans de Goede break; 921c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 922c5fca485SHans de Goede if (!ts->gpiod_rst) 923c5fca485SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 924c5fca485SHans de Goede break; 925a7d4b171SHans de Goede default: 926e070a97bSHans de Goede if (ts->gpiod_int && ts->gpiod_rst) { 9271921daceSHans de Goede ts->reset_controller_at_probe = true; 928e070a97bSHans de Goede ts->load_cfg_from_disk = true; 92949db3997SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_GPIO; 930e070a97bSHans de Goede } 931a7d4b171SHans de Goede } 93249db3997SHans de Goede 933ec6e1b40SIrina Tirdea return 0; 934ec6e1b40SIrina Tirdea } 935ec6e1b40SIrina Tirdea 936ca96ea86SBastien Nocera /** 937ca96ea86SBastien Nocera * goodix_read_config - Read the embedded configuration of the panel 938ca96ea86SBastien Nocera * 939ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 940ca96ea86SBastien Nocera * 941ca96ea86SBastien Nocera * Must be called during probe 942ca96ea86SBastien Nocera */ 943ca96ea86SBastien Nocera static void goodix_read_config(struct goodix_ts_data *ts) 944ca96ea86SBastien Nocera { 945fafef982SMarcin Niestroj int x_max, y_max; 946ca96ea86SBastien Nocera int error; 947ca96ea86SBastien Nocera 948*09182ed2SHans de Goede /* 949*09182ed2SHans de Goede * On controllers where we need to upload the firmware 950*09182ed2SHans de Goede * (controllers without flash) ts->config already has the config 951*09182ed2SHans de Goede * at this point and the controller itself does not have it yet! 952*09182ed2SHans de Goede */ 953*09182ed2SHans de Goede if (!ts->firmware_name) { 95425309004SMarcin Niestroj error = goodix_i2c_read(ts->client, ts->chip->config_addr, 955de956caeSHans de Goede ts->config, ts->chip->config_len); 956ca96ea86SBastien Nocera if (error) { 957ca96ea86SBastien Nocera ts->int_trigger_type = GOODIX_INT_TRIGGER; 958a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 959ca96ea86SBastien Nocera return; 960ca96ea86SBastien Nocera } 961*09182ed2SHans de Goede } 962ca96ea86SBastien Nocera 963de956caeSHans de Goede ts->int_trigger_type = ts->config[TRIGGER_LOC] & 0x03; 964de956caeSHans de Goede ts->max_touch_num = ts->config[MAX_CONTACTS_LOC] & 0x0f; 9658b5a359cSBastien Nocera 966de956caeSHans de Goede x_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC]); 967de956caeSHans de Goede y_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC + 2]); 968fafef982SMarcin Niestroj if (x_max && y_max) { 969fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_X, x_max - 1); 970fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_Y, y_max - 1); 971ca96ea86SBastien Nocera } 972de956caeSHans de Goede 973de956caeSHans de Goede ts->chip->calc_config_checksum(ts); 97457c80e8eSKarsten Merker } 975ca96ea86SBastien Nocera 976ca96ea86SBastien Nocera /** 977ca96ea86SBastien Nocera * goodix_read_version - Read goodix touchscreen version 978ca96ea86SBastien Nocera * 97968caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 980ca96ea86SBastien Nocera */ 98168caf858SIrina Tirdea static int goodix_read_version(struct goodix_ts_data *ts) 982ca96ea86SBastien Nocera { 983ca96ea86SBastien Nocera int error; 984ca96ea86SBastien Nocera u8 buf[6]; 985cae102e2SIcenowy Zheng char id_str[GOODIX_ID_MAX_LEN + 1]; 986ca96ea86SBastien Nocera 98768caf858SIrina Tirdea error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf)); 9887642f29cSHans de Goede if (error) 989ca96ea86SBastien Nocera return error; 990ca96ea86SBastien Nocera 991cae102e2SIcenowy Zheng memcpy(id_str, buf, GOODIX_ID_MAX_LEN); 992cae102e2SIcenowy Zheng id_str[GOODIX_ID_MAX_LEN] = 0; 993cae102e2SIcenowy Zheng strscpy(ts->id, id_str, GOODIX_ID_MAX_LEN + 1); 994e70b0307SIrina Tirdea 99568caf858SIrina Tirdea ts->version = get_unaligned_le16(&buf[4]); 996ca96ea86SBastien Nocera 997cae102e2SIcenowy Zheng dev_info(&ts->client->dev, "ID %s, version: %04x\n", ts->id, 99868caf858SIrina Tirdea ts->version); 999ca96ea86SBastien Nocera 1000ca96ea86SBastien Nocera return 0; 1001ca96ea86SBastien Nocera } 1002ca96ea86SBastien Nocera 1003ca96ea86SBastien Nocera /** 1004ca96ea86SBastien Nocera * goodix_i2c_test - I2C test function to check if the device answers. 1005ca96ea86SBastien Nocera * 1006ca96ea86SBastien Nocera * @client: the i2c client 1007ca96ea86SBastien Nocera */ 1008ca96ea86SBastien Nocera static int goodix_i2c_test(struct i2c_client *client) 1009ca96ea86SBastien Nocera { 1010ca96ea86SBastien Nocera int retry = 0; 1011ca96ea86SBastien Nocera int error; 1012ca96ea86SBastien Nocera u8 test; 1013ca96ea86SBastien Nocera 1014ca96ea86SBastien Nocera while (retry++ < 2) { 10157642f29cSHans de Goede error = goodix_i2c_read(client, GOODIX_REG_ID, &test, 1); 1016ca96ea86SBastien Nocera if (!error) 1017ca96ea86SBastien Nocera return 0; 1018ca96ea86SBastien Nocera 1019ca96ea86SBastien Nocera msleep(20); 1020ca96ea86SBastien Nocera } 1021ca96ea86SBastien Nocera 1022ca96ea86SBastien Nocera return error; 1023ca96ea86SBastien Nocera } 1024ca96ea86SBastien Nocera 1025ca96ea86SBastien Nocera /** 102668caf858SIrina Tirdea * goodix_configure_dev - Finish device initialization 102768caf858SIrina Tirdea * 102868caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 102968caf858SIrina Tirdea * 103068caf858SIrina Tirdea * Must be called from probe to finish initialization of the device. 103168caf858SIrina Tirdea * Contains the common initialization code for both devices that 103268caf858SIrina Tirdea * declare gpio pins and devices that do not. It is either called 103368caf858SIrina Tirdea * directly from probe or from request_firmware_wait callback. 103468caf858SIrina Tirdea */ 103568caf858SIrina Tirdea static int goodix_configure_dev(struct goodix_ts_data *ts) 103668caf858SIrina Tirdea { 103768caf858SIrina Tirdea int error; 1038492ee52cSDmitry Mastykin int i; 103968caf858SIrina Tirdea 1040fafef982SMarcin Niestroj ts->int_trigger_type = GOODIX_INT_TRIGGER; 1041fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 1042ad48cf5eSKarsten Merker 1043fafef982SMarcin Niestroj ts->input_dev = devm_input_allocate_device(&ts->client->dev); 1044fafef982SMarcin Niestroj if (!ts->input_dev) { 1045fafef982SMarcin Niestroj dev_err(&ts->client->dev, "Failed to allocate input device."); 1046fafef982SMarcin Niestroj return -ENOMEM; 1047fafef982SMarcin Niestroj } 1048fafef982SMarcin Niestroj 1049fafef982SMarcin Niestroj ts->input_dev->name = "Goodix Capacitive TouchScreen"; 1050fafef982SMarcin Niestroj ts->input_dev->phys = "input/ts"; 1051fafef982SMarcin Niestroj ts->input_dev->id.bustype = BUS_I2C; 1052fafef982SMarcin Niestroj ts->input_dev->id.vendor = 0x0416; 1053cae102e2SIcenowy Zheng if (kstrtou16(ts->id, 10, &ts->input_dev->id.product)) 1054cae102e2SIcenowy Zheng ts->input_dev->id.product = 0x1001; 1055fafef982SMarcin Niestroj ts->input_dev->id.version = ts->version; 1056fafef982SMarcin Niestroj 1057492ee52cSDmitry Mastykin ts->input_dev->keycode = ts->keymap; 1058492ee52cSDmitry Mastykin ts->input_dev->keycodesize = sizeof(ts->keymap[0]); 1059492ee52cSDmitry Mastykin ts->input_dev->keycodemax = GOODIX_MAX_KEYS; 1060492ee52cSDmitry Mastykin 1061fafef982SMarcin Niestroj /* Capacitive Windows/Home button on some devices */ 1062492ee52cSDmitry Mastykin for (i = 0; i < GOODIX_MAX_KEYS; ++i) { 1063492ee52cSDmitry Mastykin if (i == 0) 1064492ee52cSDmitry Mastykin ts->keymap[i] = KEY_LEFTMETA; 1065492ee52cSDmitry Mastykin else 1066492ee52cSDmitry Mastykin ts->keymap[i] = KEY_F1 + (i - 1); 1067492ee52cSDmitry Mastykin 1068492ee52cSDmitry Mastykin input_set_capability(ts->input_dev, EV_KEY, ts->keymap[i]); 1069492ee52cSDmitry Mastykin } 1070fafef982SMarcin Niestroj 1071fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X); 1072fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y); 1073fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 1074fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 1075fafef982SMarcin Niestroj 1076fafef982SMarcin Niestroj /* Read configuration and apply touchscreen parameters */ 107768caf858SIrina Tirdea goodix_read_config(ts); 107868caf858SIrina Tirdea 1079fafef982SMarcin Niestroj /* Try overriding touchscreen parameters via device properties */ 1080fafef982SMarcin Niestroj touchscreen_parse_properties(ts->input_dev, true, &ts->prop); 1081fafef982SMarcin Niestroj 1082fafef982SMarcin Niestroj if (!ts->prop.max_x || !ts->prop.max_y || !ts->max_touch_num) { 1083c1c00aa5SGuido Günther dev_err(&ts->client->dev, 1084c1c00aa5SGuido Günther "Invalid config (%d, %d, %d), using defaults\n", 1085c1c00aa5SGuido Günther ts->prop.max_x, ts->prop.max_y, ts->max_touch_num); 1086fafef982SMarcin Niestroj ts->prop.max_x = GOODIX_MAX_WIDTH - 1; 1087fafef982SMarcin Niestroj ts->prop.max_y = GOODIX_MAX_HEIGHT - 1; 1088fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 1089fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 1090fafef982SMarcin Niestroj ABS_MT_POSITION_X, ts->prop.max_x); 1091fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 1092fafef982SMarcin Niestroj ABS_MT_POSITION_Y, ts->prop.max_y); 1093fafef982SMarcin Niestroj } 1094fafef982SMarcin Niestroj 1095fafef982SMarcin Niestroj if (dmi_check_system(rotated_screen)) { 1096fafef982SMarcin Niestroj ts->prop.invert_x = true; 1097fafef982SMarcin Niestroj ts->prop.invert_y = true; 1098fafef982SMarcin Niestroj dev_dbg(&ts->client->dev, 1099fafef982SMarcin Niestroj "Applying '180 degrees rotated screen' quirk\n"); 1100fafef982SMarcin Niestroj } 1101fafef982SMarcin Niestroj 1102bd3b8480SYauhen Kharuzhy if (dmi_check_system(nine_bytes_report)) { 1103bd3b8480SYauhen Kharuzhy ts->contact_size = 9; 1104bd3b8480SYauhen Kharuzhy 1105bd3b8480SYauhen Kharuzhy dev_dbg(&ts->client->dev, 1106bd3b8480SYauhen Kharuzhy "Non-standard 9-bytes report format quirk\n"); 1107bd3b8480SYauhen Kharuzhy } 1108bd3b8480SYauhen Kharuzhy 11091dd5ddc1SSergei A. Trusov if (dmi_check_system(inverted_x_screen)) { 11101dd5ddc1SSergei A. Trusov ts->prop.invert_x = true; 11111dd5ddc1SSergei A. Trusov dev_dbg(&ts->client->dev, 11121dd5ddc1SSergei A. Trusov "Applying 'inverted x screen' quirk\n"); 11131dd5ddc1SSergei A. Trusov } 11141dd5ddc1SSergei A. Trusov 1115fafef982SMarcin Niestroj error = input_mt_init_slots(ts->input_dev, ts->max_touch_num, 1116fafef982SMarcin Niestroj INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); 1117fafef982SMarcin Niestroj if (error) { 1118fafef982SMarcin Niestroj dev_err(&ts->client->dev, 1119fafef982SMarcin Niestroj "Failed to initialize MT slots: %d", error); 112068caf858SIrina Tirdea return error; 1121fafef982SMarcin Niestroj } 1122fafef982SMarcin Niestroj 1123fafef982SMarcin Niestroj error = input_register_device(ts->input_dev); 1124fafef982SMarcin Niestroj if (error) { 1125fafef982SMarcin Niestroj dev_err(&ts->client->dev, 1126fafef982SMarcin Niestroj "Failed to register input device: %d", error); 1127fafef982SMarcin Niestroj return error; 1128fafef982SMarcin Niestroj } 112968caf858SIrina Tirdea 11305ab09d6aSIrina Tirdea ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT; 11315ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 113268caf858SIrina Tirdea if (error) { 113368caf858SIrina Tirdea dev_err(&ts->client->dev, "request IRQ failed: %d\n", error); 113468caf858SIrina Tirdea return error; 113568caf858SIrina Tirdea } 113668caf858SIrina Tirdea 113768caf858SIrina Tirdea return 0; 113868caf858SIrina Tirdea } 113968caf858SIrina Tirdea 114068caf858SIrina Tirdea /** 114168caf858SIrina Tirdea * goodix_config_cb - Callback to finish device init 114268caf858SIrina Tirdea * 1143cb690465SLee Jones * @cfg: firmware config 1144584da78cSLee Jones * @ctx: our goodix_ts_data pointer 114568caf858SIrina Tirdea * 114668caf858SIrina Tirdea * request_firmware_wait callback that finishes 114768caf858SIrina Tirdea * initialization of the device. 114868caf858SIrina Tirdea */ 114968caf858SIrina Tirdea static void goodix_config_cb(const struct firmware *cfg, void *ctx) 115068caf858SIrina Tirdea { 115168caf858SIrina Tirdea struct goodix_ts_data *ts = ctx; 115268caf858SIrina Tirdea int error; 115368caf858SIrina Tirdea 1154*09182ed2SHans de Goede if (ts->firmware_name) { 1155*09182ed2SHans de Goede if (!cfg) 1156*09182ed2SHans de Goede goto err_release_cfg; 1157*09182ed2SHans de Goede 1158*09182ed2SHans de Goede error = goodix_check_cfg(ts, cfg->data, cfg->size); 1159*09182ed2SHans de Goede if (error) 1160*09182ed2SHans de Goede goto err_release_cfg; 1161*09182ed2SHans de Goede 1162*09182ed2SHans de Goede memcpy(ts->config, cfg->data, cfg->size); 1163*09182ed2SHans de Goede } else if (cfg) { 116468caf858SIrina Tirdea /* send device configuration to the firmware */ 11651a67448fSHans de Goede error = goodix_send_cfg(ts, cfg->data, cfg->size); 116668caf858SIrina Tirdea if (error) 116768caf858SIrina Tirdea goto err_release_cfg; 116868caf858SIrina Tirdea } 116968caf858SIrina Tirdea 117068caf858SIrina Tirdea goodix_configure_dev(ts); 117168caf858SIrina Tirdea 117268caf858SIrina Tirdea err_release_cfg: 117368caf858SIrina Tirdea release_firmware(cfg); 117468caf858SIrina Tirdea complete_all(&ts->firmware_loading_complete); 117568caf858SIrina Tirdea } 117668caf858SIrina Tirdea 1177ae97fb58SJagan Teki static void goodix_disable_regulators(void *arg) 1178ae97fb58SJagan Teki { 1179ae97fb58SJagan Teki struct goodix_ts_data *ts = arg; 1180ae97fb58SJagan Teki 1181ae97fb58SJagan Teki regulator_disable(ts->vddio); 1182ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1183ae97fb58SJagan Teki } 1184ae97fb58SJagan Teki 1185ca96ea86SBastien Nocera static int goodix_ts_probe(struct i2c_client *client, 1186ca96ea86SBastien Nocera const struct i2c_device_id *id) 1187ca96ea86SBastien Nocera { 1188ca96ea86SBastien Nocera struct goodix_ts_data *ts; 118920e31722SHans de Goede const char *cfg_name; 1190ca96ea86SBastien Nocera int error; 1191ca96ea86SBastien Nocera 1192ca96ea86SBastien Nocera dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr); 1193ca96ea86SBastien Nocera 1194ca96ea86SBastien Nocera if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 1195ca96ea86SBastien Nocera dev_err(&client->dev, "I2C check functionality failed.\n"); 1196ca96ea86SBastien Nocera return -ENXIO; 1197ca96ea86SBastien Nocera } 1198ca96ea86SBastien Nocera 1199ca96ea86SBastien Nocera ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); 1200ca96ea86SBastien Nocera if (!ts) 1201ca96ea86SBastien Nocera return -ENOMEM; 1202ca96ea86SBastien Nocera 1203ca96ea86SBastien Nocera ts->client = client; 1204ca96ea86SBastien Nocera i2c_set_clientdata(client, ts); 120568caf858SIrina Tirdea init_completion(&ts->firmware_loading_complete); 1206bd3b8480SYauhen Kharuzhy ts->contact_size = GOODIX_CONTACT_SIZE; 1207ca96ea86SBastien Nocera 1208ec6e1b40SIrina Tirdea error = goodix_get_gpio_config(ts); 1209ec6e1b40SIrina Tirdea if (error) 1210ec6e1b40SIrina Tirdea return error; 1211ec6e1b40SIrina Tirdea 1212ae97fb58SJagan Teki /* power up the controller */ 1213ae97fb58SJagan Teki error = regulator_enable(ts->avdd28); 1214ae97fb58SJagan Teki if (error) { 1215ae97fb58SJagan Teki dev_err(&client->dev, 1216ae97fb58SJagan Teki "Failed to enable AVDD28 regulator: %d\n", 1217ae97fb58SJagan Teki error); 1218ae97fb58SJagan Teki return error; 1219ae97fb58SJagan Teki } 1220ae97fb58SJagan Teki 1221ae97fb58SJagan Teki error = regulator_enable(ts->vddio); 1222ae97fb58SJagan Teki if (error) { 1223ae97fb58SJagan Teki dev_err(&client->dev, 1224ae97fb58SJagan Teki "Failed to enable VDDIO regulator: %d\n", 1225ae97fb58SJagan Teki error); 1226ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1227ae97fb58SJagan Teki return error; 1228ae97fb58SJagan Teki } 1229ae97fb58SJagan Teki 1230ae97fb58SJagan Teki error = devm_add_action_or_reset(&client->dev, 1231ae97fb58SJagan Teki goodix_disable_regulators, ts); 1232ae97fb58SJagan Teki if (error) 1233ae97fb58SJagan Teki return error; 1234ae97fb58SJagan Teki 12359e1f2d70SHans de Goede reset: 12361921daceSHans de Goede if (ts->reset_controller_at_probe) { 1237ec6e1b40SIrina Tirdea /* reset the controller */ 1238ec6e1b40SIrina Tirdea error = goodix_reset(ts); 1239209bda47SHans de Goede if (error) 1240ec6e1b40SIrina Tirdea return error; 1241ec6e1b40SIrina Tirdea } 1242ec6e1b40SIrina Tirdea 1243ca96ea86SBastien Nocera error = goodix_i2c_test(client); 1244ca96ea86SBastien Nocera if (error) { 12459e1f2d70SHans de Goede if (!ts->reset_controller_at_probe && 12469e1f2d70SHans de Goede ts->irq_pin_access_method != IRQ_PIN_ACCESS_NONE) { 12479e1f2d70SHans de Goede /* Retry after a controller reset */ 12489e1f2d70SHans de Goede ts->reset_controller_at_probe = true; 12499e1f2d70SHans de Goede goto reset; 12509e1f2d70SHans de Goede } 1251ca96ea86SBastien Nocera dev_err(&client->dev, "I2C communication failure: %d\n", error); 1252ca96ea86SBastien Nocera return error; 1253ca96ea86SBastien Nocera } 1254ca96ea86SBastien Nocera 1255*09182ed2SHans de Goede error = goodix_firmware_check(ts); 1256*09182ed2SHans de Goede if (error) 1257*09182ed2SHans de Goede return error; 1258*09182ed2SHans de Goede 125968caf858SIrina Tirdea error = goodix_read_version(ts); 12607642f29cSHans de Goede if (error) 1261ca96ea86SBastien Nocera return error; 1262ca96ea86SBastien Nocera 126325309004SMarcin Niestroj ts->chip = goodix_get_chip_data(ts->id); 1264a779fbc6SIrina Tirdea 1265e070a97bSHans de Goede if (ts->load_cfg_from_disk) { 126668caf858SIrina Tirdea /* update device config */ 126720e31722SHans de Goede error = device_property_read_string(&client->dev, 126820e31722SHans de Goede "goodix,config-name", 126920e31722SHans de Goede &cfg_name); 127020e31722SHans de Goede if (!error) 127120e31722SHans de Goede snprintf(ts->cfg_name, sizeof(ts->cfg_name), 127220e31722SHans de Goede "goodix/%s", cfg_name); 127320e31722SHans de Goede else 127420e31722SHans de Goede snprintf(ts->cfg_name, sizeof(ts->cfg_name), 1275cae102e2SIcenowy Zheng "goodix_%s_cfg.bin", ts->id); 1276ca96ea86SBastien Nocera 127768caf858SIrina Tirdea error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name, 127868caf858SIrina Tirdea &client->dev, GFP_KERNEL, ts, 127968caf858SIrina Tirdea goodix_config_cb); 1280ca96ea86SBastien Nocera if (error) { 128168caf858SIrina Tirdea dev_err(&client->dev, 128268caf858SIrina Tirdea "Failed to invoke firmware loader: %d\n", 128368caf858SIrina Tirdea error); 1284ca96ea86SBastien Nocera return error; 1285ca96ea86SBastien Nocera } 1286ca96ea86SBastien Nocera 1287ca96ea86SBastien Nocera return 0; 128868caf858SIrina Tirdea } else { 128968caf858SIrina Tirdea error = goodix_configure_dev(ts); 129068caf858SIrina Tirdea if (error) 129168caf858SIrina Tirdea return error; 129268caf858SIrina Tirdea } 129368caf858SIrina Tirdea 129468caf858SIrina Tirdea return 0; 129568caf858SIrina Tirdea } 129668caf858SIrina Tirdea 129768caf858SIrina Tirdea static int goodix_ts_remove(struct i2c_client *client) 129868caf858SIrina Tirdea { 129968caf858SIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 130068caf858SIrina Tirdea 1301e070a97bSHans de Goede if (ts->load_cfg_from_disk) 130268caf858SIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 130368caf858SIrina Tirdea 130468caf858SIrina Tirdea return 0; 1305ca96ea86SBastien Nocera } 1306ca96ea86SBastien Nocera 13075ab09d6aSIrina Tirdea static int __maybe_unused goodix_suspend(struct device *dev) 13085ab09d6aSIrina Tirdea { 13095ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 13105ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 13115ab09d6aSIrina Tirdea int error; 13125ab09d6aSIrina Tirdea 1313e070a97bSHans de Goede if (ts->load_cfg_from_disk) 1314e070a97bSHans de Goede wait_for_completion(&ts->firmware_loading_complete); 1315e070a97bSHans de Goede 13165ab09d6aSIrina Tirdea /* We need gpio pins to suspend/resume */ 131749db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1318faec44b6SHans de Goede disable_irq(client->irq); 13195ab09d6aSIrina Tirdea return 0; 1320faec44b6SHans de Goede } 13215ab09d6aSIrina Tirdea 13225ab09d6aSIrina Tirdea /* Free IRQ as IRQ pin is used as output in the suspend sequence */ 13235ab09d6aSIrina Tirdea goodix_free_irq(ts); 13245ab09d6aSIrina Tirdea 1325*09182ed2SHans de Goede /* Save reference (calibration) info if necessary */ 1326*09182ed2SHans de Goede goodix_save_bak_ref(ts); 1327*09182ed2SHans de Goede 13285ab09d6aSIrina Tirdea /* Output LOW on the INT pin for 5 ms */ 132949db3997SHans de Goede error = goodix_irq_direction_output(ts, 0); 13305ab09d6aSIrina Tirdea if (error) { 13315ab09d6aSIrina Tirdea goodix_request_irq(ts); 13325ab09d6aSIrina Tirdea return error; 13335ab09d6aSIrina Tirdea } 13345ab09d6aSIrina Tirdea 13355ab09d6aSIrina Tirdea usleep_range(5000, 6000); 13365ab09d6aSIrina Tirdea 13375ab09d6aSIrina Tirdea error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND, 13385ab09d6aSIrina Tirdea GOODIX_CMD_SCREEN_OFF); 13395ab09d6aSIrina Tirdea if (error) { 134049db3997SHans de Goede goodix_irq_direction_input(ts); 13415ab09d6aSIrina Tirdea goodix_request_irq(ts); 13425ab09d6aSIrina Tirdea return -EAGAIN; 13435ab09d6aSIrina Tirdea } 13445ab09d6aSIrina Tirdea 13455ab09d6aSIrina Tirdea /* 13465ab09d6aSIrina Tirdea * The datasheet specifies that the interval between sending screen-off 13475ab09d6aSIrina Tirdea * command and wake-up should be longer than 58 ms. To avoid waking up 13485ab09d6aSIrina Tirdea * sooner, delay 58ms here. 13495ab09d6aSIrina Tirdea */ 13505ab09d6aSIrina Tirdea msleep(58); 13515ab09d6aSIrina Tirdea return 0; 13525ab09d6aSIrina Tirdea } 13535ab09d6aSIrina Tirdea 13545ab09d6aSIrina Tirdea static int __maybe_unused goodix_resume(struct device *dev) 13555ab09d6aSIrina Tirdea { 13565ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 13575ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 1358273ec6bdSHans de Goede u8 config_ver; 13595ab09d6aSIrina Tirdea int error; 13605ab09d6aSIrina Tirdea 136149db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1362faec44b6SHans de Goede enable_irq(client->irq); 13635ab09d6aSIrina Tirdea return 0; 1364faec44b6SHans de Goede } 13655ab09d6aSIrina Tirdea 13665ab09d6aSIrina Tirdea /* 13675ab09d6aSIrina Tirdea * Exit sleep mode by outputting HIGH level to INT pin 13685ab09d6aSIrina Tirdea * for 2ms~5ms. 13695ab09d6aSIrina Tirdea */ 137049db3997SHans de Goede error = goodix_irq_direction_output(ts, 1); 13715ab09d6aSIrina Tirdea if (error) 13725ab09d6aSIrina Tirdea return error; 13735ab09d6aSIrina Tirdea 13745ab09d6aSIrina Tirdea usleep_range(2000, 5000); 13755ab09d6aSIrina Tirdea 13765ab09d6aSIrina Tirdea error = goodix_int_sync(ts); 13775ab09d6aSIrina Tirdea if (error) 13785ab09d6aSIrina Tirdea return error; 13795ab09d6aSIrina Tirdea 1380273ec6bdSHans de Goede error = goodix_i2c_read(ts->client, ts->chip->config_addr, 1381273ec6bdSHans de Goede &config_ver, 1); 13827642f29cSHans de Goede if (!error && config_ver != ts->config[0]) 1383273ec6bdSHans de Goede dev_info(dev, "Config version mismatch %d != %d, resetting controller\n", 1384273ec6bdSHans de Goede config_ver, ts->config[0]); 1385273ec6bdSHans de Goede 1386273ec6bdSHans de Goede if (error != 0 || config_ver != ts->config[0]) { 1387273ec6bdSHans de Goede error = goodix_reset(ts); 1388209bda47SHans de Goede if (error) 1389273ec6bdSHans de Goede return error; 1390273ec6bdSHans de Goede 1391273ec6bdSHans de Goede error = goodix_send_cfg(ts, ts->config, ts->chip->config_len); 1392273ec6bdSHans de Goede if (error) 1393273ec6bdSHans de Goede return error; 1394273ec6bdSHans de Goede } 1395273ec6bdSHans de Goede 13965ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 13975ab09d6aSIrina Tirdea if (error) 13985ab09d6aSIrina Tirdea return error; 13995ab09d6aSIrina Tirdea 14005ab09d6aSIrina Tirdea return 0; 14015ab09d6aSIrina Tirdea } 14025ab09d6aSIrina Tirdea 14035ab09d6aSIrina Tirdea static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume); 14045ab09d6aSIrina Tirdea 1405ca96ea86SBastien Nocera static const struct i2c_device_id goodix_ts_id[] = { 1406ca96ea86SBastien Nocera { "GDIX1001:00", 0 }, 1407ca96ea86SBastien Nocera { } 1408ca96ea86SBastien Nocera }; 14092e9e910eSJavier Martinez Canillas MODULE_DEVICE_TABLE(i2c, goodix_ts_id); 1410ca96ea86SBastien Nocera 1411771d8f1bSAleksei Mamlin #ifdef CONFIG_ACPI 1412ca96ea86SBastien Nocera static const struct acpi_device_id goodix_acpi_match[] = { 1413ca96ea86SBastien Nocera { "GDIX1001", 0 }, 14145ca4d1aeSEthan Lee { "GDIX1002", 0 }, 1415ca96ea86SBastien Nocera { } 1416ca96ea86SBastien Nocera }; 1417ca96ea86SBastien Nocera MODULE_DEVICE_TABLE(acpi, goodix_acpi_match); 1418771d8f1bSAleksei Mamlin #endif 1419771d8f1bSAleksei Mamlin 1420771d8f1bSAleksei Mamlin #ifdef CONFIG_OF 1421771d8f1bSAleksei Mamlin static const struct of_device_id goodix_of_match[] = { 142225309004SMarcin Niestroj { .compatible = "goodix,gt1151" }, 1423a5f50c50SJagan Teki { .compatible = "goodix,gt5663" }, 142484ef1b33SGuido Günther { .compatible = "goodix,gt5688" }, 1425771d8f1bSAleksei Mamlin { .compatible = "goodix,gt911" }, 1426771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9110" }, 1427771d8f1bSAleksei Mamlin { .compatible = "goodix,gt912" }, 1428b9a1c116SYannick Fertre { .compatible = "goodix,gt9147" }, 1429b5e458afSIcenowy Zheng { .compatible = "goodix,gt917s" }, 1430771d8f1bSAleksei Mamlin { .compatible = "goodix,gt927" }, 1431771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9271" }, 1432771d8f1bSAleksei Mamlin { .compatible = "goodix,gt928" }, 14332dce6db7SAngeloGioacchino Del Regno { .compatible = "goodix,gt9286" }, 1434771d8f1bSAleksei Mamlin { .compatible = "goodix,gt967" }, 1435771d8f1bSAleksei Mamlin { } 1436771d8f1bSAleksei Mamlin }; 1437771d8f1bSAleksei Mamlin MODULE_DEVICE_TABLE(of, goodix_of_match); 1438771d8f1bSAleksei Mamlin #endif 1439ca96ea86SBastien Nocera 1440ca96ea86SBastien Nocera static struct i2c_driver goodix_ts_driver = { 1441ca96ea86SBastien Nocera .probe = goodix_ts_probe, 144268caf858SIrina Tirdea .remove = goodix_ts_remove, 1443ca96ea86SBastien Nocera .id_table = goodix_ts_id, 1444ca96ea86SBastien Nocera .driver = { 1445ca96ea86SBastien Nocera .name = "Goodix-TS", 1446771d8f1bSAleksei Mamlin .acpi_match_table = ACPI_PTR(goodix_acpi_match), 1447771d8f1bSAleksei Mamlin .of_match_table = of_match_ptr(goodix_of_match), 14485ab09d6aSIrina Tirdea .pm = &goodix_pm_ops, 1449ca96ea86SBastien Nocera }, 1450ca96ea86SBastien Nocera }; 1451ca96ea86SBastien Nocera module_i2c_driver(goodix_ts_driver); 1452ca96ea86SBastien Nocera 1453ca96ea86SBastien Nocera MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); 1454ca96ea86SBastien Nocera MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>"); 1455ca96ea86SBastien Nocera MODULE_DESCRIPTION("Goodix touchscreen driver"); 1456ca96ea86SBastien Nocera MODULE_LICENSE("GPL v2"); 1457