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> 25*a2233cb7SHans 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 */ 203*a2233cb7SHans 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); 220ca96ea86SBastien Nocera return ret < 0 ? ret : (ret != ARRAY_SIZE(msgs) ? -EIO : 0); 221ca96ea86SBastien Nocera } 222ca96ea86SBastien Nocera 22368caf858SIrina Tirdea /** 22468caf858SIrina Tirdea * goodix_i2c_write - write data to a register of the i2c slave device. 22568caf858SIrina Tirdea * 22668caf858SIrina Tirdea * @client: i2c device. 22768caf858SIrina Tirdea * @reg: the register to write to. 22868caf858SIrina Tirdea * @buf: raw data buffer to write. 22968caf858SIrina Tirdea * @len: length of the buffer to write 23068caf858SIrina Tirdea */ 231*a2233cb7SHans de Goede int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf, int len) 23268caf858SIrina Tirdea { 23368caf858SIrina Tirdea u8 *addr_buf; 23468caf858SIrina Tirdea struct i2c_msg msg; 23568caf858SIrina Tirdea int ret; 23668caf858SIrina Tirdea 23768caf858SIrina Tirdea addr_buf = kmalloc(len + 2, GFP_KERNEL); 23868caf858SIrina Tirdea if (!addr_buf) 23968caf858SIrina Tirdea return -ENOMEM; 24068caf858SIrina Tirdea 24168caf858SIrina Tirdea addr_buf[0] = reg >> 8; 24268caf858SIrina Tirdea addr_buf[1] = reg & 0xFF; 24368caf858SIrina Tirdea memcpy(&addr_buf[2], buf, len); 24468caf858SIrina Tirdea 24568caf858SIrina Tirdea msg.flags = 0; 24668caf858SIrina Tirdea msg.addr = client->addr; 24768caf858SIrina Tirdea msg.buf = addr_buf; 24868caf858SIrina Tirdea msg.len = len + 2; 24968caf858SIrina Tirdea 25068caf858SIrina Tirdea ret = i2c_transfer(client->adapter, &msg, 1); 25168caf858SIrina Tirdea kfree(addr_buf); 25268caf858SIrina Tirdea return ret < 0 ? ret : (ret != 1 ? -EIO : 0); 25368caf858SIrina Tirdea } 25468caf858SIrina Tirdea 255*a2233cb7SHans de Goede int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value) 2565ab09d6aSIrina Tirdea { 2575ab09d6aSIrina Tirdea return goodix_i2c_write(client, reg, &value, sizeof(value)); 2585ab09d6aSIrina Tirdea } 2595ab09d6aSIrina Tirdea 260cae102e2SIcenowy Zheng static const struct goodix_chip_data *goodix_get_chip_data(const char *id) 261a779fbc6SIrina Tirdea { 262cae102e2SIcenowy Zheng unsigned int i; 26325309004SMarcin Niestroj 264cae102e2SIcenowy Zheng for (i = 0; goodix_chip_ids[i].id; i++) { 265cae102e2SIcenowy Zheng if (!strcmp(goodix_chip_ids[i].id, id)) 266cae102e2SIcenowy Zheng return goodix_chip_ids[i].data; 267a779fbc6SIrina Tirdea } 268cae102e2SIcenowy Zheng 269cae102e2SIcenowy Zheng return >9x_chip_data; 270a779fbc6SIrina Tirdea } 271a779fbc6SIrina Tirdea 272ca96ea86SBastien Nocera static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data) 273ca96ea86SBastien Nocera { 2749b5db7aaSPaul Cercueil unsigned long max_timeout; 275ca96ea86SBastien Nocera int touch_num; 276ca96ea86SBastien Nocera int error; 277492ee52cSDmitry Mastykin u16 addr = GOODIX_READ_COOR_ADDR; 278492ee52cSDmitry Mastykin /* 279492ee52cSDmitry Mastykin * We are going to read 1-byte header, 280492ee52cSDmitry Mastykin * ts->contact_size * max(1, touch_num) bytes of coordinates 281492ee52cSDmitry Mastykin * and 1-byte footer which contains the touch-key code. 282492ee52cSDmitry Mastykin */ 283492ee52cSDmitry Mastykin const int header_contact_keycode_size = 1 + ts->contact_size + 1; 284ca96ea86SBastien Nocera 2859b5db7aaSPaul Cercueil /* 2869b5db7aaSPaul Cercueil * The 'buffer status' bit, which indicates that the data is valid, is 2879b5db7aaSPaul Cercueil * not set as soon as the interrupt is raised, but slightly after. 2889b5db7aaSPaul Cercueil * This takes around 10 ms to happen, so we poll for 20 ms. 2899b5db7aaSPaul Cercueil */ 2909b5db7aaSPaul Cercueil max_timeout = jiffies + msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT); 2919b5db7aaSPaul Cercueil do { 292492ee52cSDmitry Mastykin error = goodix_i2c_read(ts->client, addr, data, 293492ee52cSDmitry Mastykin header_contact_keycode_size); 294ca96ea86SBastien Nocera if (error) { 2959b5db7aaSPaul Cercueil dev_err(&ts->client->dev, "I2C transfer error: %d\n", 2969b5db7aaSPaul Cercueil error); 297ca96ea86SBastien Nocera return error; 298ca96ea86SBastien Nocera } 299ca96ea86SBastien Nocera 3009b5db7aaSPaul Cercueil if (data[0] & GOODIX_BUFFER_STATUS_READY) { 301ca96ea86SBastien Nocera touch_num = data[0] & 0x0f; 302a7ac7c95SAleksei Mamlin if (touch_num > ts->max_touch_num) 303ca96ea86SBastien Nocera return -EPROTO; 304ca96ea86SBastien Nocera 305ca96ea86SBastien Nocera if (touch_num > 1) { 306492ee52cSDmitry Mastykin addr += header_contact_keycode_size; 307492ee52cSDmitry Mastykin data += header_contact_keycode_size; 308ca96ea86SBastien Nocera error = goodix_i2c_read(ts->client, 309492ee52cSDmitry Mastykin addr, 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 */ 32624ef83f6SDmitry Mastykin return -ENOMSG; 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 359492ee52cSDmitry Mastykin static void goodix_ts_report_key(struct goodix_ts_data *ts, u8 *data) 360492ee52cSDmitry Mastykin { 361492ee52cSDmitry Mastykin int touch_num; 362492ee52cSDmitry Mastykin u8 key_value; 363492ee52cSDmitry Mastykin int i; 364492ee52cSDmitry Mastykin 365492ee52cSDmitry Mastykin if (data[0] & GOODIX_HAVE_KEY) { 366492ee52cSDmitry Mastykin touch_num = data[0] & 0x0f; 367492ee52cSDmitry Mastykin key_value = data[1 + ts->contact_size * touch_num]; 368492ee52cSDmitry Mastykin for (i = 0; i < GOODIX_MAX_KEYS; i++) 369492ee52cSDmitry Mastykin if (key_value & BIT(i)) 370492ee52cSDmitry Mastykin input_report_key(ts->input_dev, 371492ee52cSDmitry Mastykin ts->keymap[i], 1); 372492ee52cSDmitry Mastykin } else { 373492ee52cSDmitry Mastykin for (i = 0; i < GOODIX_MAX_KEYS; i++) 374492ee52cSDmitry Mastykin input_report_key(ts->input_dev, ts->keymap[i], 0); 375492ee52cSDmitry Mastykin } 376492ee52cSDmitry Mastykin } 377492ee52cSDmitry Mastykin 378ca96ea86SBastien Nocera /** 379ca96ea86SBastien Nocera * goodix_process_events - Process incoming events 380ca96ea86SBastien Nocera * 381ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 382ca96ea86SBastien Nocera * 383ca96ea86SBastien Nocera * Called when the IRQ is triggered. Read the current device state, and push 384ca96ea86SBastien Nocera * the input events to the user space. 385ca96ea86SBastien Nocera */ 386ca96ea86SBastien Nocera static void goodix_process_events(struct goodix_ts_data *ts) 387ca96ea86SBastien Nocera { 388492ee52cSDmitry Mastykin u8 point_data[2 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS]; 389ca96ea86SBastien Nocera int touch_num; 390ca96ea86SBastien Nocera int i; 391ca96ea86SBastien Nocera 392ca96ea86SBastien Nocera touch_num = goodix_ts_read_input_report(ts, point_data); 393ca96ea86SBastien Nocera if (touch_num < 0) 394ca96ea86SBastien Nocera return; 395ca96ea86SBastien Nocera 396492ee52cSDmitry Mastykin goodix_ts_report_key(ts, point_data); 3974a54feeaSSergei A. Trusov 398ca96ea86SBastien Nocera for (i = 0; i < touch_num; i++) 399bd3b8480SYauhen Kharuzhy if (ts->contact_size == 9) 400bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_9b(ts, 401bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 402bd3b8480SYauhen Kharuzhy else 403bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_8b(ts, 404bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 405ca96ea86SBastien Nocera 406ca96ea86SBastien Nocera input_mt_sync_frame(ts->input_dev); 407ca96ea86SBastien Nocera input_sync(ts->input_dev); 408ca96ea86SBastien Nocera } 409ca96ea86SBastien Nocera 410ca96ea86SBastien Nocera /** 411ca96ea86SBastien Nocera * goodix_ts_irq_handler - The IRQ handler 412ca96ea86SBastien Nocera * 413ca96ea86SBastien Nocera * @irq: interrupt number. 414ca96ea86SBastien Nocera * @dev_id: private data pointer. 415ca96ea86SBastien Nocera */ 416ca96ea86SBastien Nocera static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id) 417ca96ea86SBastien Nocera { 418ca96ea86SBastien Nocera struct goodix_ts_data *ts = dev_id; 419ca96ea86SBastien Nocera 420ca96ea86SBastien Nocera goodix_process_events(ts); 421ca96ea86SBastien Nocera 4225d655b35SIrina Tirdea if (goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0) < 0) 423ca96ea86SBastien Nocera dev_err(&ts->client->dev, "I2C write end_cmd error\n"); 424ca96ea86SBastien Nocera 425ca96ea86SBastien Nocera return IRQ_HANDLED; 426ca96ea86SBastien Nocera } 427ca96ea86SBastien Nocera 4285ab09d6aSIrina Tirdea static void goodix_free_irq(struct goodix_ts_data *ts) 4295ab09d6aSIrina Tirdea { 4305ab09d6aSIrina Tirdea devm_free_irq(&ts->client->dev, ts->client->irq, ts); 4315ab09d6aSIrina Tirdea } 4325ab09d6aSIrina Tirdea 4335ab09d6aSIrina Tirdea static int goodix_request_irq(struct goodix_ts_data *ts) 4345ab09d6aSIrina Tirdea { 4355ab09d6aSIrina Tirdea return devm_request_threaded_irq(&ts->client->dev, ts->client->irq, 4365ab09d6aSIrina Tirdea NULL, goodix_ts_irq_handler, 4375ab09d6aSIrina Tirdea ts->irq_flags, ts->client->name, ts); 4385ab09d6aSIrina Tirdea } 4395ab09d6aSIrina Tirdea 4401a67448fSHans de Goede static int goodix_check_cfg_8(struct goodix_ts_data *ts, const u8 *cfg, int len) 44168caf858SIrina Tirdea { 4421a67448fSHans de Goede int i, raw_cfg_len = len - 2; 44368caf858SIrina Tirdea u8 check_sum = 0; 44468caf858SIrina Tirdea 44568caf858SIrina Tirdea for (i = 0; i < raw_cfg_len; i++) 4461a67448fSHans de Goede check_sum += cfg[i]; 44768caf858SIrina Tirdea check_sum = (~check_sum) + 1; 4481a67448fSHans de Goede if (check_sum != cfg[raw_cfg_len]) { 44968caf858SIrina Tirdea dev_err(&ts->client->dev, 45068caf858SIrina Tirdea "The checksum of the config fw is not correct"); 45168caf858SIrina Tirdea return -EINVAL; 45268caf858SIrina Tirdea } 45368caf858SIrina Tirdea 4541a67448fSHans de Goede if (cfg[raw_cfg_len + 1] != 1) { 45568caf858SIrina Tirdea dev_err(&ts->client->dev, 45668caf858SIrina Tirdea "Config fw must have Config_Fresh register set"); 45768caf858SIrina Tirdea return -EINVAL; 45868caf858SIrina Tirdea } 45968caf858SIrina Tirdea 46068caf858SIrina Tirdea return 0; 46168caf858SIrina Tirdea } 46268caf858SIrina Tirdea 463de956caeSHans de Goede static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts) 464de956caeSHans de Goede { 465de956caeSHans de Goede int i, raw_cfg_len = ts->chip->config_len - 2; 466de956caeSHans de Goede u8 check_sum = 0; 467de956caeSHans de Goede 468de956caeSHans de Goede for (i = 0; i < raw_cfg_len; i++) 469de956caeSHans de Goede check_sum += ts->config[i]; 470de956caeSHans de Goede check_sum = (~check_sum) + 1; 471de956caeSHans de Goede 472de956caeSHans de Goede ts->config[raw_cfg_len] = check_sum; 473de956caeSHans de Goede ts->config[raw_cfg_len + 1] = 1; /* Set "config_fresh" bit */ 474de956caeSHans de Goede } 475de956caeSHans de Goede 4761a67448fSHans de Goede static int goodix_check_cfg_16(struct goodix_ts_data *ts, const u8 *cfg, 4771a67448fSHans de Goede int len) 47825309004SMarcin Niestroj { 4791a67448fSHans de Goede int i, raw_cfg_len = len - 3; 48025309004SMarcin Niestroj u16 check_sum = 0; 48125309004SMarcin Niestroj 48225309004SMarcin Niestroj for (i = 0; i < raw_cfg_len; i += 2) 4831a67448fSHans de Goede check_sum += get_unaligned_be16(&cfg[i]); 48425309004SMarcin Niestroj check_sum = (~check_sum) + 1; 4851a67448fSHans de Goede if (check_sum != get_unaligned_be16(&cfg[raw_cfg_len])) { 48625309004SMarcin Niestroj dev_err(&ts->client->dev, 48725309004SMarcin Niestroj "The checksum of the config fw is not correct"); 48825309004SMarcin Niestroj return -EINVAL; 48925309004SMarcin Niestroj } 49025309004SMarcin Niestroj 4911a67448fSHans de Goede if (cfg[raw_cfg_len + 2] != 1) { 49225309004SMarcin Niestroj dev_err(&ts->client->dev, 49325309004SMarcin Niestroj "Config fw must have Config_Fresh register set"); 49425309004SMarcin Niestroj return -EINVAL; 49525309004SMarcin Niestroj } 49625309004SMarcin Niestroj 49725309004SMarcin Niestroj return 0; 49825309004SMarcin Niestroj } 49925309004SMarcin Niestroj 500de956caeSHans de Goede static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts) 501de956caeSHans de Goede { 502de956caeSHans de Goede int i, raw_cfg_len = ts->chip->config_len - 3; 503de956caeSHans de Goede u16 check_sum = 0; 504de956caeSHans de Goede 505de956caeSHans de Goede for (i = 0; i < raw_cfg_len; i += 2) 506de956caeSHans de Goede check_sum += get_unaligned_be16(&ts->config[i]); 507de956caeSHans de Goede check_sum = (~check_sum) + 1; 508de956caeSHans de Goede 509de956caeSHans de Goede put_unaligned_be16(check_sum, &ts->config[raw_cfg_len]); 510de956caeSHans de Goede ts->config[raw_cfg_len + 2] = 1; /* Set "config_fresh" bit */ 511de956caeSHans de Goede } 512de956caeSHans de Goede 51325309004SMarcin Niestroj /** 51425309004SMarcin Niestroj * goodix_check_cfg - Checks if config fw is valid 51525309004SMarcin Niestroj * 51625309004SMarcin Niestroj * @ts: goodix_ts_data pointer 51725309004SMarcin Niestroj * @cfg: firmware config data 518cb690465SLee Jones * @len: config data length 51925309004SMarcin Niestroj */ 5201a67448fSHans de Goede static int goodix_check_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) 52125309004SMarcin Niestroj { 5221a67448fSHans de Goede if (len < GOODIX_CONFIG_MIN_LENGTH || 5231a67448fSHans de Goede len > GOODIX_CONFIG_MAX_LENGTH) { 52425309004SMarcin Niestroj dev_err(&ts->client->dev, 52525309004SMarcin Niestroj "The length of the config fw is not correct"); 52625309004SMarcin Niestroj return -EINVAL; 52725309004SMarcin Niestroj } 52825309004SMarcin Niestroj 5291a67448fSHans de Goede return ts->chip->check_config(ts, cfg, len); 53025309004SMarcin Niestroj } 53125309004SMarcin Niestroj 53268caf858SIrina Tirdea /** 53368caf858SIrina Tirdea * goodix_send_cfg - Write fw config to device 53468caf858SIrina Tirdea * 53568caf858SIrina Tirdea * @ts: goodix_ts_data pointer 53668caf858SIrina Tirdea * @cfg: config firmware to write to device 537cb690465SLee Jones * @len: config data length 53868caf858SIrina Tirdea */ 539*a2233cb7SHans de Goede int goodix_send_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) 54068caf858SIrina Tirdea { 54168caf858SIrina Tirdea int error; 54268caf858SIrina Tirdea 5431a67448fSHans de Goede error = goodix_check_cfg(ts, cfg, len); 54468caf858SIrina Tirdea if (error) 54568caf858SIrina Tirdea return error; 54668caf858SIrina Tirdea 5471a67448fSHans de Goede error = goodix_i2c_write(ts->client, ts->chip->config_addr, cfg, len); 54868caf858SIrina Tirdea if (error) { 54968caf858SIrina Tirdea dev_err(&ts->client->dev, "Failed to write config data: %d", 55068caf858SIrina Tirdea error); 55168caf858SIrina Tirdea return error; 55268caf858SIrina Tirdea } 55368caf858SIrina Tirdea dev_dbg(&ts->client->dev, "Config sent successfully."); 55468caf858SIrina Tirdea 55568caf858SIrina Tirdea /* Let the firmware reconfigure itself, so sleep for 10ms */ 55668caf858SIrina Tirdea usleep_range(10000, 11000); 55768caf858SIrina Tirdea 55868caf858SIrina Tirdea return 0; 55968caf858SIrina Tirdea } 56068caf858SIrina Tirdea 561c9c20ee3SHans de Goede #ifdef ACPI_GPIO_SUPPORT 562c9c20ee3SHans de Goede static int goodix_pin_acpi_direction_input(struct goodix_ts_data *ts) 56349db3997SHans de Goede { 564c9c20ee3SHans de Goede acpi_handle handle = ACPI_HANDLE(&ts->client->dev); 565c5fca485SHans de Goede acpi_status status; 566c5fca485SHans de Goede 567c9c20ee3SHans de Goede status = acpi_evaluate_object(handle, "INTI", NULL, NULL); 568c9c20ee3SHans de Goede return ACPI_SUCCESS(status) ? 0 : -EIO; 569c9c20ee3SHans de Goede } 570c9c20ee3SHans de Goede 571c9c20ee3SHans de Goede static int goodix_pin_acpi_output_method(struct goodix_ts_data *ts, int value) 572c9c20ee3SHans de Goede { 573c9c20ee3SHans de Goede acpi_handle handle = ACPI_HANDLE(&ts->client->dev); 574c9c20ee3SHans de Goede acpi_status status; 575c9c20ee3SHans de Goede 576c9c20ee3SHans de Goede status = acpi_execute_simple_method(handle, "INTO", value); 577c9c20ee3SHans de Goede return ACPI_SUCCESS(status) ? 0 : -EIO; 578c9c20ee3SHans de Goede } 579c9c20ee3SHans de Goede #else 580c9c20ee3SHans de Goede static int goodix_pin_acpi_direction_input(struct goodix_ts_data *ts) 581c9c20ee3SHans de Goede { 582c9c20ee3SHans de Goede dev_err(&ts->client->dev, 583c9c20ee3SHans de Goede "%s called on device without ACPI support\n", __func__); 584c9c20ee3SHans de Goede return -EINVAL; 585c9c20ee3SHans de Goede } 586c9c20ee3SHans de Goede 587c9c20ee3SHans de Goede static int goodix_pin_acpi_output_method(struct goodix_ts_data *ts, int value) 588c9c20ee3SHans de Goede { 589c9c20ee3SHans de Goede dev_err(&ts->client->dev, 590c9c20ee3SHans de Goede "%s called on device without ACPI support\n", __func__); 591c9c20ee3SHans de Goede return -EINVAL; 592c9c20ee3SHans de Goede } 593c9c20ee3SHans de Goede #endif 594c9c20ee3SHans de Goede 595c9c20ee3SHans de Goede static int goodix_irq_direction_output(struct goodix_ts_data *ts, int value) 596c9c20ee3SHans de Goede { 59749db3997SHans de Goede switch (ts->irq_pin_access_method) { 59849db3997SHans de Goede case IRQ_PIN_ACCESS_NONE: 59949db3997SHans de Goede dev_err(&ts->client->dev, 60049db3997SHans de Goede "%s called without an irq_pin_access_method set\n", 60149db3997SHans de Goede __func__); 60249db3997SHans de Goede return -EINVAL; 60349db3997SHans de Goede case IRQ_PIN_ACCESS_GPIO: 60449db3997SHans de Goede return gpiod_direction_output(ts->gpiod_int, value); 605a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 606a7d4b171SHans de Goede /* 607a7d4b171SHans de Goede * The IRQ pin triggers on a falling edge, so its gets marked 608a7d4b171SHans de Goede * as active-low, use output_raw to avoid the value inversion. 609a7d4b171SHans de Goede */ 610a7d4b171SHans de Goede return gpiod_direction_output_raw(ts->gpiod_int, value); 611c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 612c9c20ee3SHans de Goede return goodix_pin_acpi_output_method(ts, value); 61349db3997SHans de Goede } 61449db3997SHans de Goede 61549db3997SHans de Goede return -EINVAL; /* Never reached */ 61649db3997SHans de Goede } 61749db3997SHans de Goede 61849db3997SHans de Goede static int goodix_irq_direction_input(struct goodix_ts_data *ts) 61949db3997SHans de Goede { 62049db3997SHans de Goede switch (ts->irq_pin_access_method) { 62149db3997SHans de Goede case IRQ_PIN_ACCESS_NONE: 62249db3997SHans de Goede dev_err(&ts->client->dev, 62349db3997SHans de Goede "%s called without an irq_pin_access_method set\n", 62449db3997SHans de Goede __func__); 62549db3997SHans de Goede return -EINVAL; 62649db3997SHans de Goede case IRQ_PIN_ACCESS_GPIO: 627c9c20ee3SHans de Goede return gpiod_direction_input(ts->gpiod_int); 628a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 62949db3997SHans de Goede return gpiod_direction_input(ts->gpiod_int); 630c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 631c9c20ee3SHans de Goede return goodix_pin_acpi_direction_input(ts); 63249db3997SHans de Goede } 63349db3997SHans de Goede 63449db3997SHans de Goede return -EINVAL; /* Never reached */ 63549db3997SHans de Goede } 63649db3997SHans de Goede 637*a2233cb7SHans de Goede int goodix_int_sync(struct goodix_ts_data *ts) 638ec6e1b40SIrina Tirdea { 639ec6e1b40SIrina Tirdea int error; 640ec6e1b40SIrina Tirdea 64149db3997SHans de Goede error = goodix_irq_direction_output(ts, 0); 642ec6e1b40SIrina Tirdea if (error) 643ec6e1b40SIrina Tirdea return error; 644ec6e1b40SIrina Tirdea 645ec6e1b40SIrina Tirdea msleep(50); /* T5: 50ms */ 646ec6e1b40SIrina Tirdea 64749db3997SHans de Goede error = goodix_irq_direction_input(ts); 648ec6e1b40SIrina Tirdea if (error) 649ec6e1b40SIrina Tirdea return error; 650ec6e1b40SIrina Tirdea 651ec6e1b40SIrina Tirdea return 0; 652ec6e1b40SIrina Tirdea } 653ec6e1b40SIrina Tirdea 654ec6e1b40SIrina Tirdea /** 655ec6e1b40SIrina Tirdea * goodix_reset - Reset device during power on 656ec6e1b40SIrina Tirdea * 657ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 658ec6e1b40SIrina Tirdea */ 659ec6e1b40SIrina Tirdea static int goodix_reset(struct goodix_ts_data *ts) 660ec6e1b40SIrina Tirdea { 661ec6e1b40SIrina Tirdea int error; 662ec6e1b40SIrina Tirdea 663ec6e1b40SIrina Tirdea /* begin select I2C slave addr */ 664ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 0); 665ec6e1b40SIrina Tirdea if (error) 666ec6e1b40SIrina Tirdea return error; 667ec6e1b40SIrina Tirdea 668ec6e1b40SIrina Tirdea msleep(20); /* T2: > 10ms */ 669ec6e1b40SIrina Tirdea 670ec6e1b40SIrina Tirdea /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */ 67149db3997SHans de Goede error = goodix_irq_direction_output(ts, ts->client->addr == 0x14); 672ec6e1b40SIrina Tirdea if (error) 673ec6e1b40SIrina Tirdea return error; 674ec6e1b40SIrina Tirdea 675ec6e1b40SIrina Tirdea usleep_range(100, 2000); /* T3: > 100us */ 676ec6e1b40SIrina Tirdea 677ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 1); 678ec6e1b40SIrina Tirdea if (error) 679ec6e1b40SIrina Tirdea return error; 680ec6e1b40SIrina Tirdea 681ec6e1b40SIrina Tirdea usleep_range(6000, 10000); /* T4: > 5ms */ 682ec6e1b40SIrina Tirdea 683ec6e1b40SIrina Tirdea /* end select I2C slave addr */ 684ec6e1b40SIrina Tirdea error = gpiod_direction_input(ts->gpiod_rst); 685ec6e1b40SIrina Tirdea if (error) 686ec6e1b40SIrina Tirdea return error; 687ec6e1b40SIrina Tirdea 688ec6e1b40SIrina Tirdea error = goodix_int_sync(ts); 689ec6e1b40SIrina Tirdea if (error) 690ec6e1b40SIrina Tirdea return error; 691ec6e1b40SIrina Tirdea 692ec6e1b40SIrina Tirdea return 0; 693ec6e1b40SIrina Tirdea } 694ec6e1b40SIrina Tirdea 695c9c20ee3SHans de Goede #ifdef ACPI_GPIO_SUPPORT 69667abd9eeSHans de Goede #include <asm/cpu_device_id.h> 69767abd9eeSHans de Goede #include <asm/intel-family.h> 69867abd9eeSHans de Goede 69967abd9eeSHans de Goede static const struct x86_cpu_id baytrail_cpu_ids[] = { 70067abd9eeSHans de Goede { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT, X86_FEATURE_ANY, }, 70167abd9eeSHans de Goede {} 70267abd9eeSHans de Goede }; 70367abd9eeSHans de Goede 70467abd9eeSHans de Goede static inline bool is_byt(void) 70567abd9eeSHans de Goede { 70667abd9eeSHans de Goede const struct x86_cpu_id *id = x86_match_cpu(baytrail_cpu_ids); 70767abd9eeSHans de Goede 70867abd9eeSHans de Goede return !!id; 70967abd9eeSHans de Goede } 71067abd9eeSHans de Goede 711a7d4b171SHans de Goede static const struct acpi_gpio_params first_gpio = { 0, 0, false }; 712a7d4b171SHans de Goede static const struct acpi_gpio_params second_gpio = { 1, 0, false }; 713a7d4b171SHans de Goede 714a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_first_gpios[] = { 715a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &first_gpio, 1 }, 716a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &second_gpio, 1 }, 717a7d4b171SHans de Goede { }, 718a7d4b171SHans de Goede }; 719a7d4b171SHans de Goede 720a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_last_gpios[] = { 721a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 722a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &second_gpio, 1 }, 723a7d4b171SHans de Goede { }, 724a7d4b171SHans de Goede }; 725a7d4b171SHans de Goede 726c5fca485SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_reset_only_gpios[] = { 727c5fca485SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 728c5fca485SHans de Goede { }, 729c5fca485SHans de Goede }; 730c5fca485SHans de Goede 731a7d4b171SHans de Goede static int goodix_resource(struct acpi_resource *ares, void *data) 732a7d4b171SHans de Goede { 733a7d4b171SHans de Goede struct goodix_ts_data *ts = data; 734a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 735a7d4b171SHans de Goede struct acpi_resource_gpio *gpio; 736a7d4b171SHans de Goede 737a7d4b171SHans de Goede switch (ares->type) { 738a7d4b171SHans de Goede case ACPI_RESOURCE_TYPE_GPIO: 739a7d4b171SHans de Goede gpio = &ares->data.gpio; 740a7d4b171SHans de Goede if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { 741a7d4b171SHans de Goede if (ts->gpio_int_idx == -1) { 742a7d4b171SHans de Goede ts->gpio_int_idx = ts->gpio_count; 743a7d4b171SHans de Goede } else { 744a7d4b171SHans de Goede dev_err(dev, "More then one GpioInt resource, ignoring ACPI GPIO resources\n"); 745a7d4b171SHans de Goede ts->gpio_int_idx = -2; 746a7d4b171SHans de Goede } 747a7d4b171SHans de Goede } 748a7d4b171SHans de Goede ts->gpio_count++; 749a7d4b171SHans de Goede break; 750a7d4b171SHans de Goede default: 751a7d4b171SHans de Goede break; 752a7d4b171SHans de Goede } 753a7d4b171SHans de Goede 754a7d4b171SHans de Goede return 0; 755a7d4b171SHans de Goede } 756a7d4b171SHans de Goede 757a7d4b171SHans de Goede /* 758a7d4b171SHans de Goede * This function gets called in case we fail to get the irq GPIO directly 759a7d4b171SHans de Goede * because the ACPI tables lack GPIO-name to APCI _CRS index mappings 760a7d4b171SHans de Goede * (no _DSD UUID daffd814-6eba-4d8c-8a91-bc9bbf4aa301 data). 761a7d4b171SHans de Goede * In that case we add our own mapping and then goodix_get_gpio_config() 762a7d4b171SHans de Goede * retries to get the GPIOs based on the added mapping. 763a7d4b171SHans de Goede */ 764a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 765a7d4b171SHans de Goede { 766a7d4b171SHans de Goede const struct acpi_gpio_mapping *gpio_mapping = NULL; 767a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 768a7d4b171SHans de Goede LIST_HEAD(resources); 769a7d4b171SHans de Goede int ret; 770a7d4b171SHans de Goede 771a7d4b171SHans de Goede ts->gpio_count = 0; 772a7d4b171SHans de Goede ts->gpio_int_idx = -1; 773a7d4b171SHans de Goede ret = acpi_dev_get_resources(ACPI_COMPANION(dev), &resources, 774a7d4b171SHans de Goede goodix_resource, ts); 775a7d4b171SHans de Goede if (ret < 0) { 776a7d4b171SHans de Goede dev_err(dev, "Error getting ACPI resources: %d\n", ret); 777a7d4b171SHans de Goede return ret; 778a7d4b171SHans de Goede } 779a7d4b171SHans de Goede 780a7d4b171SHans de Goede acpi_dev_free_resource_list(&resources); 781a7d4b171SHans de Goede 782a7d4b171SHans de Goede if (ts->gpio_count == 2 && ts->gpio_int_idx == 0) { 783a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 784a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_first_gpios; 785a7d4b171SHans de Goede } else if (ts->gpio_count == 2 && ts->gpio_int_idx == 1) { 786a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 787a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_last_gpios; 788c5fca485SHans de Goede } else if (ts->gpio_count == 1 && ts->gpio_int_idx == -1 && 789c5fca485SHans de Goede acpi_has_method(ACPI_HANDLE(dev), "INTI") && 790c5fca485SHans de Goede acpi_has_method(ACPI_HANDLE(dev), "INTO")) { 791c5fca485SHans de Goede dev_info(dev, "Using ACPI INTI and INTO methods for IRQ pin access\n"); 792c5fca485SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_METHOD; 793c5fca485SHans de Goede gpio_mapping = acpi_goodix_reset_only_gpios; 79467abd9eeSHans de Goede } else if (is_byt() && ts->gpio_count == 2 && ts->gpio_int_idx == -1) { 79567abd9eeSHans de Goede dev_info(dev, "No ACPI GpioInt resource, assuming that the GPIO order is reset, int\n"); 79667abd9eeSHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 79767abd9eeSHans de Goede gpio_mapping = acpi_goodix_int_last_gpios; 798a7d4b171SHans de Goede } else { 799a7d4b171SHans de Goede dev_warn(dev, "Unexpected ACPI resources: gpio_count %d, gpio_int_idx %d\n", 800a7d4b171SHans de Goede ts->gpio_count, ts->gpio_int_idx); 801a7d4b171SHans de Goede return -EINVAL; 802a7d4b171SHans de Goede } 803a7d4b171SHans de Goede 804a7d4b171SHans de Goede return devm_acpi_dev_add_driver_gpios(dev, gpio_mapping); 805a7d4b171SHans de Goede } 806a7d4b171SHans de Goede #else 807a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 808a7d4b171SHans de Goede { 809a7d4b171SHans de Goede return -EINVAL; 810a7d4b171SHans de Goede } 811a7d4b171SHans de Goede #endif /* CONFIG_X86 && CONFIG_ACPI */ 812a7d4b171SHans de Goede 813ec6e1b40SIrina Tirdea /** 814ec6e1b40SIrina Tirdea * goodix_get_gpio_config - Get GPIO config from ACPI/DT 815ec6e1b40SIrina Tirdea * 816ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 817ec6e1b40SIrina Tirdea */ 818ec6e1b40SIrina Tirdea static int goodix_get_gpio_config(struct goodix_ts_data *ts) 819ec6e1b40SIrina Tirdea { 820ec6e1b40SIrina Tirdea int error; 821ec6e1b40SIrina Tirdea struct device *dev; 822ec6e1b40SIrina Tirdea struct gpio_desc *gpiod; 823a7d4b171SHans de Goede bool added_acpi_mappings = false; 824ec6e1b40SIrina Tirdea 825ec6e1b40SIrina Tirdea if (!ts->client) 826ec6e1b40SIrina Tirdea return -EINVAL; 827ec6e1b40SIrina Tirdea dev = &ts->client->dev; 828ec6e1b40SIrina Tirdea 829ae97fb58SJagan Teki ts->avdd28 = devm_regulator_get(dev, "AVDD28"); 830ae97fb58SJagan Teki if (IS_ERR(ts->avdd28)) { 831ae97fb58SJagan Teki error = PTR_ERR(ts->avdd28); 832ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 833ae97fb58SJagan Teki dev_err(dev, 834ae97fb58SJagan Teki "Failed to get AVDD28 regulator: %d\n", error); 835ae97fb58SJagan Teki return error; 836ae97fb58SJagan Teki } 837ae97fb58SJagan Teki 838ae97fb58SJagan Teki ts->vddio = devm_regulator_get(dev, "VDDIO"); 839ae97fb58SJagan Teki if (IS_ERR(ts->vddio)) { 840ae97fb58SJagan Teki error = PTR_ERR(ts->vddio); 841ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 842ae97fb58SJagan Teki dev_err(dev, 843ae97fb58SJagan Teki "Failed to get VDDIO regulator: %d\n", error); 844ae97fb58SJagan Teki return error; 845ae97fb58SJagan Teki } 846ae97fb58SJagan Teki 847a7d4b171SHans de Goede retry_get_irq_gpio: 848ec6e1b40SIrina Tirdea /* Get the interrupt GPIO pin number */ 849ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN); 850ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 851ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 852ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 853ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 854ec6e1b40SIrina Tirdea GOODIX_GPIO_INT_NAME, error); 855ec6e1b40SIrina Tirdea return error; 856ec6e1b40SIrina Tirdea } 857a7d4b171SHans de Goede if (!gpiod && has_acpi_companion(dev) && !added_acpi_mappings) { 858a7d4b171SHans de Goede added_acpi_mappings = true; 859a7d4b171SHans de Goede if (goodix_add_acpi_gpio_mappings(ts) == 0) 860a7d4b171SHans de Goede goto retry_get_irq_gpio; 861a7d4b171SHans de Goede } 862ec6e1b40SIrina Tirdea 863ec6e1b40SIrina Tirdea ts->gpiod_int = gpiod; 864ec6e1b40SIrina Tirdea 865ec6e1b40SIrina Tirdea /* Get the reset line GPIO pin number */ 866ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, GPIOD_IN); 867ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 868ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 869ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 870ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 871ec6e1b40SIrina Tirdea GOODIX_GPIO_RST_NAME, error); 872ec6e1b40SIrina Tirdea return error; 873ec6e1b40SIrina Tirdea } 874ec6e1b40SIrina Tirdea 875ec6e1b40SIrina Tirdea ts->gpiod_rst = gpiod; 876ec6e1b40SIrina Tirdea 877a7d4b171SHans de Goede switch (ts->irq_pin_access_method) { 878a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 879a7d4b171SHans de Goede /* 880a7d4b171SHans de Goede * We end up here if goodix_add_acpi_gpio_mappings() has 881a7d4b171SHans de Goede * called devm_acpi_dev_add_driver_gpios() because the ACPI 882a7d4b171SHans de Goede * tables did not contain name to index mappings. 883a7d4b171SHans de Goede * Check that we successfully got both GPIOs after we've 884a7d4b171SHans de Goede * added our own acpi_gpio_mapping and if we did not get both 885a7d4b171SHans de Goede * GPIOs reset irq_pin_access_method to IRQ_PIN_ACCESS_NONE. 886a7d4b171SHans de Goede */ 887a7d4b171SHans de Goede if (!ts->gpiod_int || !ts->gpiod_rst) 888a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 889a7d4b171SHans de Goede break; 890c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 891c5fca485SHans de Goede if (!ts->gpiod_rst) 892c5fca485SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 893c5fca485SHans de Goede break; 894a7d4b171SHans de Goede default: 895e070a97bSHans de Goede if (ts->gpiod_int && ts->gpiod_rst) { 8961921daceSHans de Goede ts->reset_controller_at_probe = true; 897e070a97bSHans de Goede ts->load_cfg_from_disk = true; 89849db3997SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_GPIO; 899e070a97bSHans de Goede } 900a7d4b171SHans de Goede } 90149db3997SHans de Goede 902ec6e1b40SIrina Tirdea return 0; 903ec6e1b40SIrina Tirdea } 904ec6e1b40SIrina Tirdea 905ca96ea86SBastien Nocera /** 906ca96ea86SBastien Nocera * goodix_read_config - Read the embedded configuration of the panel 907ca96ea86SBastien Nocera * 908ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 909ca96ea86SBastien Nocera * 910ca96ea86SBastien Nocera * Must be called during probe 911ca96ea86SBastien Nocera */ 912ca96ea86SBastien Nocera static void goodix_read_config(struct goodix_ts_data *ts) 913ca96ea86SBastien Nocera { 914fafef982SMarcin Niestroj int x_max, y_max; 915ca96ea86SBastien Nocera int error; 916ca96ea86SBastien Nocera 91725309004SMarcin Niestroj error = goodix_i2c_read(ts->client, ts->chip->config_addr, 918de956caeSHans de Goede ts->config, ts->chip->config_len); 919ca96ea86SBastien Nocera if (error) { 920fafef982SMarcin Niestroj dev_warn(&ts->client->dev, "Error reading config: %d\n", 921ca96ea86SBastien Nocera error); 922ca96ea86SBastien Nocera ts->int_trigger_type = GOODIX_INT_TRIGGER; 923a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 924ca96ea86SBastien Nocera return; 925ca96ea86SBastien Nocera } 926ca96ea86SBastien Nocera 927de956caeSHans de Goede ts->int_trigger_type = ts->config[TRIGGER_LOC] & 0x03; 928de956caeSHans de Goede ts->max_touch_num = ts->config[MAX_CONTACTS_LOC] & 0x0f; 9298b5a359cSBastien Nocera 930de956caeSHans de Goede x_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC]); 931de956caeSHans de Goede y_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC + 2]); 932fafef982SMarcin Niestroj if (x_max && y_max) { 933fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_X, x_max - 1); 934fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_Y, y_max - 1); 935ca96ea86SBastien Nocera } 936de956caeSHans de Goede 937de956caeSHans de Goede ts->chip->calc_config_checksum(ts); 93857c80e8eSKarsten Merker } 939ca96ea86SBastien Nocera 940ca96ea86SBastien Nocera /** 941ca96ea86SBastien Nocera * goodix_read_version - Read goodix touchscreen version 942ca96ea86SBastien Nocera * 94368caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 944ca96ea86SBastien Nocera */ 94568caf858SIrina Tirdea static int goodix_read_version(struct goodix_ts_data *ts) 946ca96ea86SBastien Nocera { 947ca96ea86SBastien Nocera int error; 948ca96ea86SBastien Nocera u8 buf[6]; 949cae102e2SIcenowy Zheng char id_str[GOODIX_ID_MAX_LEN + 1]; 950ca96ea86SBastien Nocera 95168caf858SIrina Tirdea error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf)); 952ca96ea86SBastien Nocera if (error) { 95368caf858SIrina Tirdea dev_err(&ts->client->dev, "read version failed: %d\n", error); 954ca96ea86SBastien Nocera return error; 955ca96ea86SBastien Nocera } 956ca96ea86SBastien Nocera 957cae102e2SIcenowy Zheng memcpy(id_str, buf, GOODIX_ID_MAX_LEN); 958cae102e2SIcenowy Zheng id_str[GOODIX_ID_MAX_LEN] = 0; 959cae102e2SIcenowy Zheng strscpy(ts->id, id_str, GOODIX_ID_MAX_LEN + 1); 960e70b0307SIrina Tirdea 96168caf858SIrina Tirdea ts->version = get_unaligned_le16(&buf[4]); 962ca96ea86SBastien Nocera 963cae102e2SIcenowy Zheng dev_info(&ts->client->dev, "ID %s, version: %04x\n", ts->id, 96468caf858SIrina Tirdea ts->version); 965ca96ea86SBastien Nocera 966ca96ea86SBastien Nocera return 0; 967ca96ea86SBastien Nocera } 968ca96ea86SBastien Nocera 969ca96ea86SBastien Nocera /** 970ca96ea86SBastien Nocera * goodix_i2c_test - I2C test function to check if the device answers. 971ca96ea86SBastien Nocera * 972ca96ea86SBastien Nocera * @client: the i2c client 973ca96ea86SBastien Nocera */ 974ca96ea86SBastien Nocera static int goodix_i2c_test(struct i2c_client *client) 975ca96ea86SBastien Nocera { 976ca96ea86SBastien Nocera int retry = 0; 977ca96ea86SBastien Nocera int error; 978ca96ea86SBastien Nocera u8 test; 979ca96ea86SBastien Nocera 980ca96ea86SBastien Nocera while (retry++ < 2) { 98125309004SMarcin Niestroj error = goodix_i2c_read(client, GOODIX_REG_ID, 982ca96ea86SBastien Nocera &test, 1); 983ca96ea86SBastien Nocera if (!error) 984ca96ea86SBastien Nocera return 0; 985ca96ea86SBastien Nocera 986ca96ea86SBastien Nocera dev_err(&client->dev, "i2c test failed attempt %d: %d\n", 987ca96ea86SBastien Nocera retry, error); 988ca96ea86SBastien Nocera msleep(20); 989ca96ea86SBastien Nocera } 990ca96ea86SBastien Nocera 991ca96ea86SBastien Nocera return error; 992ca96ea86SBastien Nocera } 993ca96ea86SBastien Nocera 994ca96ea86SBastien Nocera /** 99568caf858SIrina Tirdea * goodix_configure_dev - Finish device initialization 99668caf858SIrina Tirdea * 99768caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 99868caf858SIrina Tirdea * 99968caf858SIrina Tirdea * Must be called from probe to finish initialization of the device. 100068caf858SIrina Tirdea * Contains the common initialization code for both devices that 100168caf858SIrina Tirdea * declare gpio pins and devices that do not. It is either called 100268caf858SIrina Tirdea * directly from probe or from request_firmware_wait callback. 100368caf858SIrina Tirdea */ 100468caf858SIrina Tirdea static int goodix_configure_dev(struct goodix_ts_data *ts) 100568caf858SIrina Tirdea { 100668caf858SIrina Tirdea int error; 1007492ee52cSDmitry Mastykin int i; 100868caf858SIrina Tirdea 1009fafef982SMarcin Niestroj ts->int_trigger_type = GOODIX_INT_TRIGGER; 1010fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 1011ad48cf5eSKarsten Merker 1012fafef982SMarcin Niestroj ts->input_dev = devm_input_allocate_device(&ts->client->dev); 1013fafef982SMarcin Niestroj if (!ts->input_dev) { 1014fafef982SMarcin Niestroj dev_err(&ts->client->dev, "Failed to allocate input device."); 1015fafef982SMarcin Niestroj return -ENOMEM; 1016fafef982SMarcin Niestroj } 1017fafef982SMarcin Niestroj 1018fafef982SMarcin Niestroj ts->input_dev->name = "Goodix Capacitive TouchScreen"; 1019fafef982SMarcin Niestroj ts->input_dev->phys = "input/ts"; 1020fafef982SMarcin Niestroj ts->input_dev->id.bustype = BUS_I2C; 1021fafef982SMarcin Niestroj ts->input_dev->id.vendor = 0x0416; 1022cae102e2SIcenowy Zheng if (kstrtou16(ts->id, 10, &ts->input_dev->id.product)) 1023cae102e2SIcenowy Zheng ts->input_dev->id.product = 0x1001; 1024fafef982SMarcin Niestroj ts->input_dev->id.version = ts->version; 1025fafef982SMarcin Niestroj 1026492ee52cSDmitry Mastykin ts->input_dev->keycode = ts->keymap; 1027492ee52cSDmitry Mastykin ts->input_dev->keycodesize = sizeof(ts->keymap[0]); 1028492ee52cSDmitry Mastykin ts->input_dev->keycodemax = GOODIX_MAX_KEYS; 1029492ee52cSDmitry Mastykin 1030fafef982SMarcin Niestroj /* Capacitive Windows/Home button on some devices */ 1031492ee52cSDmitry Mastykin for (i = 0; i < GOODIX_MAX_KEYS; ++i) { 1032492ee52cSDmitry Mastykin if (i == 0) 1033492ee52cSDmitry Mastykin ts->keymap[i] = KEY_LEFTMETA; 1034492ee52cSDmitry Mastykin else 1035492ee52cSDmitry Mastykin ts->keymap[i] = KEY_F1 + (i - 1); 1036492ee52cSDmitry Mastykin 1037492ee52cSDmitry Mastykin input_set_capability(ts->input_dev, EV_KEY, ts->keymap[i]); 1038492ee52cSDmitry Mastykin } 1039fafef982SMarcin Niestroj 1040fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X); 1041fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y); 1042fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 1043fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 1044fafef982SMarcin Niestroj 1045fafef982SMarcin Niestroj /* Read configuration and apply touchscreen parameters */ 104668caf858SIrina Tirdea goodix_read_config(ts); 104768caf858SIrina Tirdea 1048fafef982SMarcin Niestroj /* Try overriding touchscreen parameters via device properties */ 1049fafef982SMarcin Niestroj touchscreen_parse_properties(ts->input_dev, true, &ts->prop); 1050fafef982SMarcin Niestroj 1051fafef982SMarcin Niestroj if (!ts->prop.max_x || !ts->prop.max_y || !ts->max_touch_num) { 1052c1c00aa5SGuido Günther dev_err(&ts->client->dev, 1053c1c00aa5SGuido Günther "Invalid config (%d, %d, %d), using defaults\n", 1054c1c00aa5SGuido Günther ts->prop.max_x, ts->prop.max_y, ts->max_touch_num); 1055fafef982SMarcin Niestroj ts->prop.max_x = GOODIX_MAX_WIDTH - 1; 1056fafef982SMarcin Niestroj ts->prop.max_y = GOODIX_MAX_HEIGHT - 1; 1057fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 1058fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 1059fafef982SMarcin Niestroj ABS_MT_POSITION_X, ts->prop.max_x); 1060fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 1061fafef982SMarcin Niestroj ABS_MT_POSITION_Y, ts->prop.max_y); 1062fafef982SMarcin Niestroj } 1063fafef982SMarcin Niestroj 1064fafef982SMarcin Niestroj if (dmi_check_system(rotated_screen)) { 1065fafef982SMarcin Niestroj ts->prop.invert_x = true; 1066fafef982SMarcin Niestroj ts->prop.invert_y = true; 1067fafef982SMarcin Niestroj dev_dbg(&ts->client->dev, 1068fafef982SMarcin Niestroj "Applying '180 degrees rotated screen' quirk\n"); 1069fafef982SMarcin Niestroj } 1070fafef982SMarcin Niestroj 1071bd3b8480SYauhen Kharuzhy if (dmi_check_system(nine_bytes_report)) { 1072bd3b8480SYauhen Kharuzhy ts->contact_size = 9; 1073bd3b8480SYauhen Kharuzhy 1074bd3b8480SYauhen Kharuzhy dev_dbg(&ts->client->dev, 1075bd3b8480SYauhen Kharuzhy "Non-standard 9-bytes report format quirk\n"); 1076bd3b8480SYauhen Kharuzhy } 1077bd3b8480SYauhen Kharuzhy 10781dd5ddc1SSergei A. Trusov if (dmi_check_system(inverted_x_screen)) { 10791dd5ddc1SSergei A. Trusov ts->prop.invert_x = true; 10801dd5ddc1SSergei A. Trusov dev_dbg(&ts->client->dev, 10811dd5ddc1SSergei A. Trusov "Applying 'inverted x screen' quirk\n"); 10821dd5ddc1SSergei A. Trusov } 10831dd5ddc1SSergei A. Trusov 1084fafef982SMarcin Niestroj error = input_mt_init_slots(ts->input_dev, ts->max_touch_num, 1085fafef982SMarcin Niestroj INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); 1086fafef982SMarcin Niestroj if (error) { 1087fafef982SMarcin Niestroj dev_err(&ts->client->dev, 1088fafef982SMarcin Niestroj "Failed to initialize MT slots: %d", error); 108968caf858SIrina Tirdea return error; 1090fafef982SMarcin Niestroj } 1091fafef982SMarcin Niestroj 1092fafef982SMarcin Niestroj error = input_register_device(ts->input_dev); 1093fafef982SMarcin Niestroj if (error) { 1094fafef982SMarcin Niestroj dev_err(&ts->client->dev, 1095fafef982SMarcin Niestroj "Failed to register input device: %d", error); 1096fafef982SMarcin Niestroj return error; 1097fafef982SMarcin Niestroj } 109868caf858SIrina Tirdea 10995ab09d6aSIrina Tirdea ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT; 11005ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 110168caf858SIrina Tirdea if (error) { 110268caf858SIrina Tirdea dev_err(&ts->client->dev, "request IRQ failed: %d\n", error); 110368caf858SIrina Tirdea return error; 110468caf858SIrina Tirdea } 110568caf858SIrina Tirdea 110668caf858SIrina Tirdea return 0; 110768caf858SIrina Tirdea } 110868caf858SIrina Tirdea 110968caf858SIrina Tirdea /** 111068caf858SIrina Tirdea * goodix_config_cb - Callback to finish device init 111168caf858SIrina Tirdea * 1112cb690465SLee Jones * @cfg: firmware config 1113584da78cSLee Jones * @ctx: our goodix_ts_data pointer 111468caf858SIrina Tirdea * 111568caf858SIrina Tirdea * request_firmware_wait callback that finishes 111668caf858SIrina Tirdea * initialization of the device. 111768caf858SIrina Tirdea */ 111868caf858SIrina Tirdea static void goodix_config_cb(const struct firmware *cfg, void *ctx) 111968caf858SIrina Tirdea { 112068caf858SIrina Tirdea struct goodix_ts_data *ts = ctx; 112168caf858SIrina Tirdea int error; 112268caf858SIrina Tirdea 112368caf858SIrina Tirdea if (cfg) { 112468caf858SIrina Tirdea /* send device configuration to the firmware */ 11251a67448fSHans de Goede error = goodix_send_cfg(ts, cfg->data, cfg->size); 112668caf858SIrina Tirdea if (error) 112768caf858SIrina Tirdea goto err_release_cfg; 112868caf858SIrina Tirdea } 112968caf858SIrina Tirdea 113068caf858SIrina Tirdea goodix_configure_dev(ts); 113168caf858SIrina Tirdea 113268caf858SIrina Tirdea err_release_cfg: 113368caf858SIrina Tirdea release_firmware(cfg); 113468caf858SIrina Tirdea complete_all(&ts->firmware_loading_complete); 113568caf858SIrina Tirdea } 113668caf858SIrina Tirdea 1137ae97fb58SJagan Teki static void goodix_disable_regulators(void *arg) 1138ae97fb58SJagan Teki { 1139ae97fb58SJagan Teki struct goodix_ts_data *ts = arg; 1140ae97fb58SJagan Teki 1141ae97fb58SJagan Teki regulator_disable(ts->vddio); 1142ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1143ae97fb58SJagan Teki } 1144ae97fb58SJagan Teki 1145ca96ea86SBastien Nocera static int goodix_ts_probe(struct i2c_client *client, 1146ca96ea86SBastien Nocera const struct i2c_device_id *id) 1147ca96ea86SBastien Nocera { 1148ca96ea86SBastien Nocera struct goodix_ts_data *ts; 1149ca96ea86SBastien Nocera int error; 1150ca96ea86SBastien Nocera 1151ca96ea86SBastien Nocera dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr); 1152ca96ea86SBastien Nocera 1153ca96ea86SBastien Nocera if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 1154ca96ea86SBastien Nocera dev_err(&client->dev, "I2C check functionality failed.\n"); 1155ca96ea86SBastien Nocera return -ENXIO; 1156ca96ea86SBastien Nocera } 1157ca96ea86SBastien Nocera 1158ca96ea86SBastien Nocera ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); 1159ca96ea86SBastien Nocera if (!ts) 1160ca96ea86SBastien Nocera return -ENOMEM; 1161ca96ea86SBastien Nocera 1162ca96ea86SBastien Nocera ts->client = client; 1163ca96ea86SBastien Nocera i2c_set_clientdata(client, ts); 116468caf858SIrina Tirdea init_completion(&ts->firmware_loading_complete); 1165bd3b8480SYauhen Kharuzhy ts->contact_size = GOODIX_CONTACT_SIZE; 1166ca96ea86SBastien Nocera 1167ec6e1b40SIrina Tirdea error = goodix_get_gpio_config(ts); 1168ec6e1b40SIrina Tirdea if (error) 1169ec6e1b40SIrina Tirdea return error; 1170ec6e1b40SIrina Tirdea 1171ae97fb58SJagan Teki /* power up the controller */ 1172ae97fb58SJagan Teki error = regulator_enable(ts->avdd28); 1173ae97fb58SJagan Teki if (error) { 1174ae97fb58SJagan Teki dev_err(&client->dev, 1175ae97fb58SJagan Teki "Failed to enable AVDD28 regulator: %d\n", 1176ae97fb58SJagan Teki error); 1177ae97fb58SJagan Teki return error; 1178ae97fb58SJagan Teki } 1179ae97fb58SJagan Teki 1180ae97fb58SJagan Teki error = regulator_enable(ts->vddio); 1181ae97fb58SJagan Teki if (error) { 1182ae97fb58SJagan Teki dev_err(&client->dev, 1183ae97fb58SJagan Teki "Failed to enable VDDIO regulator: %d\n", 1184ae97fb58SJagan Teki error); 1185ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1186ae97fb58SJagan Teki return error; 1187ae97fb58SJagan Teki } 1188ae97fb58SJagan Teki 1189ae97fb58SJagan Teki error = devm_add_action_or_reset(&client->dev, 1190ae97fb58SJagan Teki goodix_disable_regulators, ts); 1191ae97fb58SJagan Teki if (error) 1192ae97fb58SJagan Teki return error; 1193ae97fb58SJagan Teki 11949e1f2d70SHans de Goede reset: 11951921daceSHans de Goede if (ts->reset_controller_at_probe) { 1196ec6e1b40SIrina Tirdea /* reset the controller */ 1197ec6e1b40SIrina Tirdea error = goodix_reset(ts); 1198ec6e1b40SIrina Tirdea if (error) { 1199ec6e1b40SIrina Tirdea dev_err(&client->dev, "Controller reset failed.\n"); 1200ec6e1b40SIrina Tirdea return error; 1201ec6e1b40SIrina Tirdea } 1202ec6e1b40SIrina Tirdea } 1203ec6e1b40SIrina Tirdea 1204ca96ea86SBastien Nocera error = goodix_i2c_test(client); 1205ca96ea86SBastien Nocera if (error) { 12069e1f2d70SHans de Goede if (!ts->reset_controller_at_probe && 12079e1f2d70SHans de Goede ts->irq_pin_access_method != IRQ_PIN_ACCESS_NONE) { 12089e1f2d70SHans de Goede /* Retry after a controller reset */ 12099e1f2d70SHans de Goede ts->reset_controller_at_probe = true; 12109e1f2d70SHans de Goede goto reset; 12119e1f2d70SHans de Goede } 1212ca96ea86SBastien Nocera dev_err(&client->dev, "I2C communication failure: %d\n", error); 1213ca96ea86SBastien Nocera return error; 1214ca96ea86SBastien Nocera } 1215ca96ea86SBastien Nocera 121668caf858SIrina Tirdea error = goodix_read_version(ts); 1217ca96ea86SBastien Nocera if (error) { 1218ca96ea86SBastien Nocera dev_err(&client->dev, "Read version failed.\n"); 1219ca96ea86SBastien Nocera return error; 1220ca96ea86SBastien Nocera } 1221ca96ea86SBastien Nocera 122225309004SMarcin Niestroj ts->chip = goodix_get_chip_data(ts->id); 1223a779fbc6SIrina Tirdea 1224e070a97bSHans de Goede if (ts->load_cfg_from_disk) { 122568caf858SIrina Tirdea /* update device config */ 122668caf858SIrina Tirdea ts->cfg_name = devm_kasprintf(&client->dev, GFP_KERNEL, 1227cae102e2SIcenowy Zheng "goodix_%s_cfg.bin", ts->id); 122868caf858SIrina Tirdea if (!ts->cfg_name) 122968caf858SIrina Tirdea return -ENOMEM; 1230ca96ea86SBastien Nocera 123168caf858SIrina Tirdea error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name, 123268caf858SIrina Tirdea &client->dev, GFP_KERNEL, ts, 123368caf858SIrina Tirdea goodix_config_cb); 1234ca96ea86SBastien Nocera if (error) { 123568caf858SIrina Tirdea dev_err(&client->dev, 123668caf858SIrina Tirdea "Failed to invoke firmware loader: %d\n", 123768caf858SIrina Tirdea error); 1238ca96ea86SBastien Nocera return error; 1239ca96ea86SBastien Nocera } 1240ca96ea86SBastien Nocera 1241ca96ea86SBastien Nocera return 0; 124268caf858SIrina Tirdea } else { 124368caf858SIrina Tirdea error = goodix_configure_dev(ts); 124468caf858SIrina Tirdea if (error) 124568caf858SIrina Tirdea return error; 124668caf858SIrina Tirdea } 124768caf858SIrina Tirdea 124868caf858SIrina Tirdea return 0; 124968caf858SIrina Tirdea } 125068caf858SIrina Tirdea 125168caf858SIrina Tirdea static int goodix_ts_remove(struct i2c_client *client) 125268caf858SIrina Tirdea { 125368caf858SIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 125468caf858SIrina Tirdea 1255e070a97bSHans de Goede if (ts->load_cfg_from_disk) 125668caf858SIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 125768caf858SIrina Tirdea 125868caf858SIrina Tirdea return 0; 1259ca96ea86SBastien Nocera } 1260ca96ea86SBastien Nocera 12615ab09d6aSIrina Tirdea static int __maybe_unused goodix_suspend(struct device *dev) 12625ab09d6aSIrina Tirdea { 12635ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 12645ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 12655ab09d6aSIrina Tirdea int error; 12665ab09d6aSIrina Tirdea 1267e070a97bSHans de Goede if (ts->load_cfg_from_disk) 1268e070a97bSHans de Goede wait_for_completion(&ts->firmware_loading_complete); 1269e070a97bSHans de Goede 12705ab09d6aSIrina Tirdea /* We need gpio pins to suspend/resume */ 127149db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1272faec44b6SHans de Goede disable_irq(client->irq); 12735ab09d6aSIrina Tirdea return 0; 1274faec44b6SHans de Goede } 12755ab09d6aSIrina Tirdea 12765ab09d6aSIrina Tirdea /* Free IRQ as IRQ pin is used as output in the suspend sequence */ 12775ab09d6aSIrina Tirdea goodix_free_irq(ts); 12785ab09d6aSIrina Tirdea 12795ab09d6aSIrina Tirdea /* Output LOW on the INT pin for 5 ms */ 128049db3997SHans de Goede error = goodix_irq_direction_output(ts, 0); 12815ab09d6aSIrina Tirdea if (error) { 12825ab09d6aSIrina Tirdea goodix_request_irq(ts); 12835ab09d6aSIrina Tirdea return error; 12845ab09d6aSIrina Tirdea } 12855ab09d6aSIrina Tirdea 12865ab09d6aSIrina Tirdea usleep_range(5000, 6000); 12875ab09d6aSIrina Tirdea 12885ab09d6aSIrina Tirdea error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND, 12895ab09d6aSIrina Tirdea GOODIX_CMD_SCREEN_OFF); 12905ab09d6aSIrina Tirdea if (error) { 12915ab09d6aSIrina Tirdea dev_err(&ts->client->dev, "Screen off command failed\n"); 129249db3997SHans de Goede goodix_irq_direction_input(ts); 12935ab09d6aSIrina Tirdea goodix_request_irq(ts); 12945ab09d6aSIrina Tirdea return -EAGAIN; 12955ab09d6aSIrina Tirdea } 12965ab09d6aSIrina Tirdea 12975ab09d6aSIrina Tirdea /* 12985ab09d6aSIrina Tirdea * The datasheet specifies that the interval between sending screen-off 12995ab09d6aSIrina Tirdea * command and wake-up should be longer than 58 ms. To avoid waking up 13005ab09d6aSIrina Tirdea * sooner, delay 58ms here. 13015ab09d6aSIrina Tirdea */ 13025ab09d6aSIrina Tirdea msleep(58); 13035ab09d6aSIrina Tirdea return 0; 13045ab09d6aSIrina Tirdea } 13055ab09d6aSIrina Tirdea 13065ab09d6aSIrina Tirdea static int __maybe_unused goodix_resume(struct device *dev) 13075ab09d6aSIrina Tirdea { 13085ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 13095ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 1310273ec6bdSHans de Goede u8 config_ver; 13115ab09d6aSIrina Tirdea int error; 13125ab09d6aSIrina Tirdea 131349db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1314faec44b6SHans de Goede enable_irq(client->irq); 13155ab09d6aSIrina Tirdea return 0; 1316faec44b6SHans de Goede } 13175ab09d6aSIrina Tirdea 13185ab09d6aSIrina Tirdea /* 13195ab09d6aSIrina Tirdea * Exit sleep mode by outputting HIGH level to INT pin 13205ab09d6aSIrina Tirdea * for 2ms~5ms. 13215ab09d6aSIrina Tirdea */ 132249db3997SHans de Goede error = goodix_irq_direction_output(ts, 1); 13235ab09d6aSIrina Tirdea if (error) 13245ab09d6aSIrina Tirdea return error; 13255ab09d6aSIrina Tirdea 13265ab09d6aSIrina Tirdea usleep_range(2000, 5000); 13275ab09d6aSIrina Tirdea 13285ab09d6aSIrina Tirdea error = goodix_int_sync(ts); 13295ab09d6aSIrina Tirdea if (error) 13305ab09d6aSIrina Tirdea return error; 13315ab09d6aSIrina Tirdea 1332273ec6bdSHans de Goede error = goodix_i2c_read(ts->client, ts->chip->config_addr, 1333273ec6bdSHans de Goede &config_ver, 1); 1334273ec6bdSHans de Goede if (error) 1335273ec6bdSHans de Goede dev_warn(dev, "Error reading config version: %d, resetting controller\n", 1336273ec6bdSHans de Goede error); 1337273ec6bdSHans de Goede else if (config_ver != ts->config[0]) 1338273ec6bdSHans de Goede dev_info(dev, "Config version mismatch %d != %d, resetting controller\n", 1339273ec6bdSHans de Goede config_ver, ts->config[0]); 1340273ec6bdSHans de Goede 1341273ec6bdSHans de Goede if (error != 0 || config_ver != ts->config[0]) { 1342273ec6bdSHans de Goede error = goodix_reset(ts); 1343273ec6bdSHans de Goede if (error) { 1344273ec6bdSHans de Goede dev_err(dev, "Controller reset failed.\n"); 1345273ec6bdSHans de Goede return error; 1346273ec6bdSHans de Goede } 1347273ec6bdSHans de Goede 1348273ec6bdSHans de Goede error = goodix_send_cfg(ts, ts->config, ts->chip->config_len); 1349273ec6bdSHans de Goede if (error) 1350273ec6bdSHans de Goede return error; 1351273ec6bdSHans de Goede } 1352273ec6bdSHans de Goede 13535ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 13545ab09d6aSIrina Tirdea if (error) 13555ab09d6aSIrina Tirdea return error; 13565ab09d6aSIrina Tirdea 13575ab09d6aSIrina Tirdea return 0; 13585ab09d6aSIrina Tirdea } 13595ab09d6aSIrina Tirdea 13605ab09d6aSIrina Tirdea static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume); 13615ab09d6aSIrina Tirdea 1362ca96ea86SBastien Nocera static const struct i2c_device_id goodix_ts_id[] = { 1363ca96ea86SBastien Nocera { "GDIX1001:00", 0 }, 1364ca96ea86SBastien Nocera { } 1365ca96ea86SBastien Nocera }; 13662e9e910eSJavier Martinez Canillas MODULE_DEVICE_TABLE(i2c, goodix_ts_id); 1367ca96ea86SBastien Nocera 1368771d8f1bSAleksei Mamlin #ifdef CONFIG_ACPI 1369ca96ea86SBastien Nocera static const struct acpi_device_id goodix_acpi_match[] = { 1370ca96ea86SBastien Nocera { "GDIX1001", 0 }, 13715ca4d1aeSEthan Lee { "GDIX1002", 0 }, 1372ca96ea86SBastien Nocera { } 1373ca96ea86SBastien Nocera }; 1374ca96ea86SBastien Nocera MODULE_DEVICE_TABLE(acpi, goodix_acpi_match); 1375771d8f1bSAleksei Mamlin #endif 1376771d8f1bSAleksei Mamlin 1377771d8f1bSAleksei Mamlin #ifdef CONFIG_OF 1378771d8f1bSAleksei Mamlin static const struct of_device_id goodix_of_match[] = { 137925309004SMarcin Niestroj { .compatible = "goodix,gt1151" }, 1380a5f50c50SJagan Teki { .compatible = "goodix,gt5663" }, 138184ef1b33SGuido Günther { .compatible = "goodix,gt5688" }, 1382771d8f1bSAleksei Mamlin { .compatible = "goodix,gt911" }, 1383771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9110" }, 1384771d8f1bSAleksei Mamlin { .compatible = "goodix,gt912" }, 1385b9a1c116SYannick Fertre { .compatible = "goodix,gt9147" }, 1386b5e458afSIcenowy Zheng { .compatible = "goodix,gt917s" }, 1387771d8f1bSAleksei Mamlin { .compatible = "goodix,gt927" }, 1388771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9271" }, 1389771d8f1bSAleksei Mamlin { .compatible = "goodix,gt928" }, 13902dce6db7SAngeloGioacchino Del Regno { .compatible = "goodix,gt9286" }, 1391771d8f1bSAleksei Mamlin { .compatible = "goodix,gt967" }, 1392771d8f1bSAleksei Mamlin { } 1393771d8f1bSAleksei Mamlin }; 1394771d8f1bSAleksei Mamlin MODULE_DEVICE_TABLE(of, goodix_of_match); 1395771d8f1bSAleksei Mamlin #endif 1396ca96ea86SBastien Nocera 1397ca96ea86SBastien Nocera static struct i2c_driver goodix_ts_driver = { 1398ca96ea86SBastien Nocera .probe = goodix_ts_probe, 139968caf858SIrina Tirdea .remove = goodix_ts_remove, 1400ca96ea86SBastien Nocera .id_table = goodix_ts_id, 1401ca96ea86SBastien Nocera .driver = { 1402ca96ea86SBastien Nocera .name = "Goodix-TS", 1403771d8f1bSAleksei Mamlin .acpi_match_table = ACPI_PTR(goodix_acpi_match), 1404771d8f1bSAleksei Mamlin .of_match_table = of_match_ptr(goodix_of_match), 14055ab09d6aSIrina Tirdea .pm = &goodix_pm_ops, 1406ca96ea86SBastien Nocera }, 1407ca96ea86SBastien Nocera }; 1408ca96ea86SBastien Nocera module_i2c_driver(goodix_ts_driver); 1409ca96ea86SBastien Nocera 1410ca96ea86SBastien Nocera MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); 1411ca96ea86SBastien Nocera MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>"); 1412ca96ea86SBastien Nocera MODULE_DESCRIPTION("Goodix touchscreen driver"); 1413ca96ea86SBastien Nocera MODULE_LICENSE("GPL v2"); 1414