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 3299b5db7aaSPaul Cercueil usleep_range(1000, 2000); /* Poll every 1 - 2 ms */ 3309b5db7aaSPaul Cercueil } while (time_before(jiffies, max_timeout)); 3319b5db7aaSPaul Cercueil 3329b5db7aaSPaul Cercueil /* 3339b5db7aaSPaul Cercueil * The Goodix panel will send spurious interrupts after a 3349b5db7aaSPaul Cercueil * 'finger up' event, which will always cause a timeout. 3359b5db7aaSPaul Cercueil */ 33624ef83f6SDmitry Mastykin return -ENOMSG; 3379b5db7aaSPaul Cercueil } 3389b5db7aaSPaul Cercueil 339bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_8b(struct goodix_ts_data *ts, u8 *coor_data) 340ca96ea86SBastien Nocera { 341ca96ea86SBastien Nocera int id = coor_data[0] & 0x0F; 342ca96ea86SBastien Nocera int input_x = get_unaligned_le16(&coor_data[1]); 343ca96ea86SBastien Nocera int input_y = get_unaligned_le16(&coor_data[3]); 344ca96ea86SBastien Nocera int input_w = get_unaligned_le16(&coor_data[5]); 345ca96ea86SBastien Nocera 346ca96ea86SBastien Nocera input_mt_slot(ts->input_dev, id); 347ca96ea86SBastien Nocera input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 348fafef982SMarcin Niestroj touchscreen_report_pos(ts->input_dev, &ts->prop, 349fafef982SMarcin Niestroj input_x, input_y, true); 350ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 351ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 352ca96ea86SBastien Nocera } 353ca96ea86SBastien Nocera 354bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_9b(struct goodix_ts_data *ts, u8 *coor_data) 355bd3b8480SYauhen Kharuzhy { 356bd3b8480SYauhen Kharuzhy int id = coor_data[1] & 0x0F; 357bd3b8480SYauhen Kharuzhy int input_x = get_unaligned_le16(&coor_data[3]); 358bd3b8480SYauhen Kharuzhy int input_y = get_unaligned_le16(&coor_data[5]); 359bd3b8480SYauhen Kharuzhy int input_w = get_unaligned_le16(&coor_data[7]); 360bd3b8480SYauhen Kharuzhy 361bd3b8480SYauhen Kharuzhy input_mt_slot(ts->input_dev, id); 362bd3b8480SYauhen Kharuzhy input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 363bd3b8480SYauhen Kharuzhy touchscreen_report_pos(ts->input_dev, &ts->prop, 364bd3b8480SYauhen Kharuzhy input_x, input_y, true); 365bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 366bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 367bd3b8480SYauhen Kharuzhy } 368bd3b8480SYauhen Kharuzhy 369492ee52cSDmitry Mastykin static void goodix_ts_report_key(struct goodix_ts_data *ts, u8 *data) 370492ee52cSDmitry Mastykin { 371492ee52cSDmitry Mastykin int touch_num; 372492ee52cSDmitry Mastykin u8 key_value; 373492ee52cSDmitry Mastykin int i; 374492ee52cSDmitry Mastykin 375492ee52cSDmitry Mastykin if (data[0] & GOODIX_HAVE_KEY) { 376492ee52cSDmitry Mastykin touch_num = data[0] & 0x0f; 377492ee52cSDmitry Mastykin key_value = data[1 + ts->contact_size * touch_num]; 378492ee52cSDmitry Mastykin for (i = 0; i < GOODIX_MAX_KEYS; i++) 379492ee52cSDmitry Mastykin if (key_value & BIT(i)) 380492ee52cSDmitry Mastykin input_report_key(ts->input_dev, 381492ee52cSDmitry Mastykin ts->keymap[i], 1); 382492ee52cSDmitry Mastykin } else { 383492ee52cSDmitry Mastykin for (i = 0; i < GOODIX_MAX_KEYS; i++) 384492ee52cSDmitry Mastykin input_report_key(ts->input_dev, ts->keymap[i], 0); 385492ee52cSDmitry Mastykin } 386492ee52cSDmitry Mastykin } 387492ee52cSDmitry Mastykin 388ca96ea86SBastien Nocera /** 389ca96ea86SBastien Nocera * goodix_process_events - Process incoming events 390ca96ea86SBastien Nocera * 391ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 392ca96ea86SBastien Nocera * 393ca96ea86SBastien Nocera * Called when the IRQ is triggered. Read the current device state, and push 394ca96ea86SBastien Nocera * the input events to the user space. 395ca96ea86SBastien Nocera */ 396ca96ea86SBastien Nocera static void goodix_process_events(struct goodix_ts_data *ts) 397ca96ea86SBastien Nocera { 398492ee52cSDmitry Mastykin u8 point_data[2 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS]; 399ca96ea86SBastien Nocera int touch_num; 400ca96ea86SBastien Nocera int i; 401ca96ea86SBastien Nocera 402ca96ea86SBastien Nocera touch_num = goodix_ts_read_input_report(ts, point_data); 403ca96ea86SBastien Nocera if (touch_num < 0) 404ca96ea86SBastien Nocera return; 405ca96ea86SBastien Nocera 406492ee52cSDmitry Mastykin goodix_ts_report_key(ts, point_data); 4074a54feeaSSergei A. Trusov 408ca96ea86SBastien Nocera for (i = 0; i < touch_num; i++) 409bd3b8480SYauhen Kharuzhy if (ts->contact_size == 9) 410bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_9b(ts, 411bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 412bd3b8480SYauhen Kharuzhy else 413bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_8b(ts, 414bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 415ca96ea86SBastien Nocera 416ca96ea86SBastien Nocera input_mt_sync_frame(ts->input_dev); 417ca96ea86SBastien Nocera input_sync(ts->input_dev); 418ca96ea86SBastien Nocera } 419ca96ea86SBastien Nocera 420ca96ea86SBastien Nocera /** 421ca96ea86SBastien Nocera * goodix_ts_irq_handler - The IRQ handler 422ca96ea86SBastien Nocera * 423ca96ea86SBastien Nocera * @irq: interrupt number. 424ca96ea86SBastien Nocera * @dev_id: private data pointer. 425ca96ea86SBastien Nocera */ 426ca96ea86SBastien Nocera static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id) 427ca96ea86SBastien Nocera { 428ca96ea86SBastien Nocera struct goodix_ts_data *ts = dev_id; 429ca96ea86SBastien Nocera 430ca96ea86SBastien Nocera goodix_process_events(ts); 4317642f29cSHans de Goede goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0); 432ca96ea86SBastien Nocera 433ca96ea86SBastien Nocera return IRQ_HANDLED; 434ca96ea86SBastien Nocera } 435ca96ea86SBastien Nocera 4365ab09d6aSIrina Tirdea static void goodix_free_irq(struct goodix_ts_data *ts) 4375ab09d6aSIrina Tirdea { 4385ab09d6aSIrina Tirdea devm_free_irq(&ts->client->dev, ts->client->irq, ts); 4395ab09d6aSIrina Tirdea } 4405ab09d6aSIrina Tirdea 4415ab09d6aSIrina Tirdea static int goodix_request_irq(struct goodix_ts_data *ts) 4425ab09d6aSIrina Tirdea { 4435ab09d6aSIrina Tirdea return devm_request_threaded_irq(&ts->client->dev, ts->client->irq, 4445ab09d6aSIrina Tirdea NULL, goodix_ts_irq_handler, 4455ab09d6aSIrina Tirdea ts->irq_flags, ts->client->name, ts); 4465ab09d6aSIrina Tirdea } 4475ab09d6aSIrina Tirdea 4481a67448fSHans de Goede static int goodix_check_cfg_8(struct goodix_ts_data *ts, const u8 *cfg, int len) 44968caf858SIrina Tirdea { 4501a67448fSHans de Goede int i, raw_cfg_len = len - 2; 45168caf858SIrina Tirdea u8 check_sum = 0; 45268caf858SIrina Tirdea 45368caf858SIrina Tirdea for (i = 0; i < raw_cfg_len; i++) 4541a67448fSHans de Goede check_sum += cfg[i]; 45568caf858SIrina Tirdea check_sum = (~check_sum) + 1; 4561a67448fSHans de Goede if (check_sum != cfg[raw_cfg_len]) { 45768caf858SIrina Tirdea dev_err(&ts->client->dev, 45868caf858SIrina Tirdea "The checksum of the config fw is not correct"); 45968caf858SIrina Tirdea return -EINVAL; 46068caf858SIrina Tirdea } 46168caf858SIrina Tirdea 4621a67448fSHans de Goede if (cfg[raw_cfg_len + 1] != 1) { 46368caf858SIrina Tirdea dev_err(&ts->client->dev, 46468caf858SIrina Tirdea "Config fw must have Config_Fresh register set"); 46568caf858SIrina Tirdea return -EINVAL; 46668caf858SIrina Tirdea } 46768caf858SIrina Tirdea 46868caf858SIrina Tirdea return 0; 46968caf858SIrina Tirdea } 47068caf858SIrina Tirdea 471de956caeSHans de Goede static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts) 472de956caeSHans de Goede { 473de956caeSHans de Goede int i, raw_cfg_len = ts->chip->config_len - 2; 474de956caeSHans de Goede u8 check_sum = 0; 475de956caeSHans de Goede 476de956caeSHans de Goede for (i = 0; i < raw_cfg_len; i++) 477de956caeSHans de Goede check_sum += ts->config[i]; 478de956caeSHans de Goede check_sum = (~check_sum) + 1; 479de956caeSHans de Goede 480de956caeSHans de Goede ts->config[raw_cfg_len] = check_sum; 481de956caeSHans de Goede ts->config[raw_cfg_len + 1] = 1; /* Set "config_fresh" bit */ 482de956caeSHans de Goede } 483de956caeSHans de Goede 4841a67448fSHans de Goede static int goodix_check_cfg_16(struct goodix_ts_data *ts, const u8 *cfg, 4851a67448fSHans de Goede int len) 48625309004SMarcin Niestroj { 4871a67448fSHans de Goede int i, raw_cfg_len = len - 3; 48825309004SMarcin Niestroj u16 check_sum = 0; 48925309004SMarcin Niestroj 49025309004SMarcin Niestroj for (i = 0; i < raw_cfg_len; i += 2) 4911a67448fSHans de Goede check_sum += get_unaligned_be16(&cfg[i]); 49225309004SMarcin Niestroj check_sum = (~check_sum) + 1; 4931a67448fSHans de Goede if (check_sum != get_unaligned_be16(&cfg[raw_cfg_len])) { 49425309004SMarcin Niestroj dev_err(&ts->client->dev, 49525309004SMarcin Niestroj "The checksum of the config fw is not correct"); 49625309004SMarcin Niestroj return -EINVAL; 49725309004SMarcin Niestroj } 49825309004SMarcin Niestroj 4991a67448fSHans de Goede if (cfg[raw_cfg_len + 2] != 1) { 50025309004SMarcin Niestroj dev_err(&ts->client->dev, 50125309004SMarcin Niestroj "Config fw must have Config_Fresh register set"); 50225309004SMarcin Niestroj return -EINVAL; 50325309004SMarcin Niestroj } 50425309004SMarcin Niestroj 50525309004SMarcin Niestroj return 0; 50625309004SMarcin Niestroj } 50725309004SMarcin Niestroj 508de956caeSHans de Goede static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts) 509de956caeSHans de Goede { 510de956caeSHans de Goede int i, raw_cfg_len = ts->chip->config_len - 3; 511de956caeSHans de Goede u16 check_sum = 0; 512de956caeSHans de Goede 513de956caeSHans de Goede for (i = 0; i < raw_cfg_len; i += 2) 514de956caeSHans de Goede check_sum += get_unaligned_be16(&ts->config[i]); 515de956caeSHans de Goede check_sum = (~check_sum) + 1; 516de956caeSHans de Goede 517de956caeSHans de Goede put_unaligned_be16(check_sum, &ts->config[raw_cfg_len]); 518de956caeSHans de Goede ts->config[raw_cfg_len + 2] = 1; /* Set "config_fresh" bit */ 519de956caeSHans de Goede } 520de956caeSHans de Goede 52125309004SMarcin Niestroj /** 52225309004SMarcin Niestroj * goodix_check_cfg - Checks if config fw is valid 52325309004SMarcin Niestroj * 52425309004SMarcin Niestroj * @ts: goodix_ts_data pointer 52525309004SMarcin Niestroj * @cfg: firmware config data 526cb690465SLee Jones * @len: config data length 52725309004SMarcin Niestroj */ 5281a67448fSHans de Goede static int goodix_check_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) 52925309004SMarcin Niestroj { 5301a67448fSHans de Goede if (len < GOODIX_CONFIG_MIN_LENGTH || 5311a67448fSHans de Goede len > GOODIX_CONFIG_MAX_LENGTH) { 53225309004SMarcin Niestroj dev_err(&ts->client->dev, 53325309004SMarcin Niestroj "The length of the config fw is not correct"); 53425309004SMarcin Niestroj return -EINVAL; 53525309004SMarcin Niestroj } 53625309004SMarcin Niestroj 5371a67448fSHans de Goede return ts->chip->check_config(ts, cfg, len); 53825309004SMarcin Niestroj } 53925309004SMarcin Niestroj 54068caf858SIrina Tirdea /** 54168caf858SIrina Tirdea * goodix_send_cfg - Write fw config to device 54268caf858SIrina Tirdea * 54368caf858SIrina Tirdea * @ts: goodix_ts_data pointer 54468caf858SIrina Tirdea * @cfg: config firmware to write to device 545cb690465SLee Jones * @len: config data length 54668caf858SIrina Tirdea */ 547a2233cb7SHans de Goede int goodix_send_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) 54868caf858SIrina Tirdea { 54968caf858SIrina Tirdea int error; 55068caf858SIrina Tirdea 5511a67448fSHans de Goede error = goodix_check_cfg(ts, cfg, len); 55268caf858SIrina Tirdea if (error) 55368caf858SIrina Tirdea return error; 55468caf858SIrina Tirdea 5551a67448fSHans de Goede error = goodix_i2c_write(ts->client, ts->chip->config_addr, cfg, len); 5567642f29cSHans de Goede if (error) 55768caf858SIrina Tirdea return error; 5587642f29cSHans de Goede 55968caf858SIrina Tirdea dev_dbg(&ts->client->dev, "Config sent successfully."); 56068caf858SIrina Tirdea 56168caf858SIrina Tirdea /* Let the firmware reconfigure itself, so sleep for 10ms */ 56268caf858SIrina Tirdea usleep_range(10000, 11000); 56368caf858SIrina Tirdea 56468caf858SIrina Tirdea return 0; 56568caf858SIrina Tirdea } 56668caf858SIrina Tirdea 567c9c20ee3SHans de Goede #ifdef ACPI_GPIO_SUPPORT 568c9c20ee3SHans de Goede static int goodix_pin_acpi_direction_input(struct goodix_ts_data *ts) 56949db3997SHans de Goede { 570c9c20ee3SHans de Goede acpi_handle handle = ACPI_HANDLE(&ts->client->dev); 571c5fca485SHans de Goede acpi_status status; 572c5fca485SHans de Goede 573c9c20ee3SHans de Goede status = acpi_evaluate_object(handle, "INTI", NULL, NULL); 574c9c20ee3SHans de Goede return ACPI_SUCCESS(status) ? 0 : -EIO; 575c9c20ee3SHans de Goede } 576c9c20ee3SHans de Goede 577c9c20ee3SHans de Goede static int goodix_pin_acpi_output_method(struct goodix_ts_data *ts, int value) 578c9c20ee3SHans de Goede { 579c9c20ee3SHans de Goede acpi_handle handle = ACPI_HANDLE(&ts->client->dev); 580c9c20ee3SHans de Goede acpi_status status; 581c9c20ee3SHans de Goede 582c9c20ee3SHans de Goede status = acpi_execute_simple_method(handle, "INTO", value); 583c9c20ee3SHans de Goede return ACPI_SUCCESS(status) ? 0 : -EIO; 584c9c20ee3SHans de Goede } 585c9c20ee3SHans de Goede #else 586c9c20ee3SHans de Goede static int goodix_pin_acpi_direction_input(struct goodix_ts_data *ts) 587c9c20ee3SHans de Goede { 588c9c20ee3SHans de Goede dev_err(&ts->client->dev, 589c9c20ee3SHans de Goede "%s called on device without ACPI support\n", __func__); 590c9c20ee3SHans de Goede return -EINVAL; 591c9c20ee3SHans de Goede } 592c9c20ee3SHans de Goede 593c9c20ee3SHans de Goede static int goodix_pin_acpi_output_method(struct goodix_ts_data *ts, int value) 594c9c20ee3SHans de Goede { 595c9c20ee3SHans de Goede dev_err(&ts->client->dev, 596c9c20ee3SHans de Goede "%s called on device without ACPI support\n", __func__); 597c9c20ee3SHans de Goede return -EINVAL; 598c9c20ee3SHans de Goede } 599c9c20ee3SHans de Goede #endif 600c9c20ee3SHans de Goede 601c9c20ee3SHans de Goede static int goodix_irq_direction_output(struct goodix_ts_data *ts, int value) 602c9c20ee3SHans de Goede { 60349db3997SHans de Goede switch (ts->irq_pin_access_method) { 60449db3997SHans de Goede case IRQ_PIN_ACCESS_NONE: 60549db3997SHans de Goede dev_err(&ts->client->dev, 60649db3997SHans de Goede "%s called without an irq_pin_access_method set\n", 60749db3997SHans de Goede __func__); 60849db3997SHans de Goede return -EINVAL; 60949db3997SHans de Goede case IRQ_PIN_ACCESS_GPIO: 61049db3997SHans de Goede return gpiod_direction_output(ts->gpiod_int, value); 611a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 612a7d4b171SHans de Goede /* 613a7d4b171SHans de Goede * The IRQ pin triggers on a falling edge, so its gets marked 614a7d4b171SHans de Goede * as active-low, use output_raw to avoid the value inversion. 615a7d4b171SHans de Goede */ 616a7d4b171SHans de Goede return gpiod_direction_output_raw(ts->gpiod_int, value); 617c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 618c9c20ee3SHans de Goede return goodix_pin_acpi_output_method(ts, value); 61949db3997SHans de Goede } 62049db3997SHans de Goede 62149db3997SHans de Goede return -EINVAL; /* Never reached */ 62249db3997SHans de Goede } 62349db3997SHans de Goede 62449db3997SHans de Goede static int goodix_irq_direction_input(struct goodix_ts_data *ts) 62549db3997SHans de Goede { 62649db3997SHans de Goede switch (ts->irq_pin_access_method) { 62749db3997SHans de Goede case IRQ_PIN_ACCESS_NONE: 62849db3997SHans de Goede dev_err(&ts->client->dev, 62949db3997SHans de Goede "%s called without an irq_pin_access_method set\n", 63049db3997SHans de Goede __func__); 63149db3997SHans de Goede return -EINVAL; 63249db3997SHans de Goede case IRQ_PIN_ACCESS_GPIO: 633c9c20ee3SHans de Goede return gpiod_direction_input(ts->gpiod_int); 634a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 63549db3997SHans de Goede return gpiod_direction_input(ts->gpiod_int); 636c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 637c9c20ee3SHans de Goede return goodix_pin_acpi_direction_input(ts); 63849db3997SHans de Goede } 63949db3997SHans de Goede 64049db3997SHans de Goede return -EINVAL; /* Never reached */ 64149db3997SHans de Goede } 64249db3997SHans de Goede 643a2233cb7SHans de Goede int goodix_int_sync(struct goodix_ts_data *ts) 644ec6e1b40SIrina Tirdea { 645ec6e1b40SIrina Tirdea int error; 646ec6e1b40SIrina Tirdea 64749db3997SHans de Goede error = goodix_irq_direction_output(ts, 0); 648ec6e1b40SIrina Tirdea if (error) 649209bda47SHans de Goede goto error; 650ec6e1b40SIrina Tirdea 651ec6e1b40SIrina Tirdea msleep(50); /* T5: 50ms */ 652ec6e1b40SIrina Tirdea 65349db3997SHans de Goede error = goodix_irq_direction_input(ts); 654ec6e1b40SIrina Tirdea if (error) 655209bda47SHans de Goede goto error; 656ec6e1b40SIrina Tirdea 657ec6e1b40SIrina Tirdea return 0; 658209bda47SHans de Goede 659209bda47SHans de Goede error: 660209bda47SHans de Goede dev_err(&ts->client->dev, "Controller irq sync failed.\n"); 661209bda47SHans de Goede return error; 662209bda47SHans de Goede } 663209bda47SHans de Goede 664209bda47SHans de Goede /** 665209bda47SHans de Goede * goodix_reset_no_int_sync - Reset device, leaving interrupt line in output mode 666209bda47SHans de Goede * 667209bda47SHans de Goede * @ts: goodix_ts_data pointer 668209bda47SHans de Goede */ 669209bda47SHans de Goede int goodix_reset_no_int_sync(struct goodix_ts_data *ts) 670209bda47SHans de Goede { 671209bda47SHans de Goede int error; 672209bda47SHans de Goede 673209bda47SHans de Goede /* begin select I2C slave addr */ 674209bda47SHans de Goede error = gpiod_direction_output(ts->gpiod_rst, 0); 675209bda47SHans de Goede if (error) 676209bda47SHans de Goede goto error; 677209bda47SHans de Goede 678209bda47SHans de Goede msleep(20); /* T2: > 10ms */ 679209bda47SHans de Goede 680209bda47SHans de Goede /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */ 681209bda47SHans de Goede error = goodix_irq_direction_output(ts, ts->client->addr == 0x14); 682209bda47SHans de Goede if (error) 683209bda47SHans de Goede goto error; 684209bda47SHans de Goede 685209bda47SHans de Goede usleep_range(100, 2000); /* T3: > 100us */ 686209bda47SHans de Goede 687209bda47SHans de Goede error = gpiod_direction_output(ts->gpiod_rst, 1); 688209bda47SHans de Goede if (error) 689209bda47SHans de Goede goto error; 690209bda47SHans de Goede 691209bda47SHans de Goede usleep_range(6000, 10000); /* T4: > 5ms */ 692209bda47SHans de Goede 693209bda47SHans de Goede /* end select I2C slave addr */ 694209bda47SHans de Goede error = gpiod_direction_input(ts->gpiod_rst); 695209bda47SHans de Goede if (error) 696209bda47SHans de Goede goto error; 697209bda47SHans de Goede 698209bda47SHans de Goede return 0; 699209bda47SHans de Goede 700209bda47SHans de Goede error: 701209bda47SHans de Goede dev_err(&ts->client->dev, "Controller reset failed.\n"); 702209bda47SHans de Goede return error; 703ec6e1b40SIrina Tirdea } 704ec6e1b40SIrina Tirdea 705ec6e1b40SIrina Tirdea /** 706ec6e1b40SIrina Tirdea * goodix_reset - Reset device during power on 707ec6e1b40SIrina Tirdea * 708ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 709ec6e1b40SIrina Tirdea */ 710ec6e1b40SIrina Tirdea static int goodix_reset(struct goodix_ts_data *ts) 711ec6e1b40SIrina Tirdea { 712ec6e1b40SIrina Tirdea int error; 713ec6e1b40SIrina Tirdea 714209bda47SHans de Goede error = goodix_reset_no_int_sync(ts); 715ec6e1b40SIrina Tirdea if (error) 716ec6e1b40SIrina Tirdea return error; 717ec6e1b40SIrina Tirdea 718209bda47SHans de Goede return goodix_int_sync(ts); 719ec6e1b40SIrina Tirdea } 720ec6e1b40SIrina Tirdea 721c9c20ee3SHans de Goede #ifdef ACPI_GPIO_SUPPORT 72267abd9eeSHans de Goede #include <asm/cpu_device_id.h> 72367abd9eeSHans de Goede #include <asm/intel-family.h> 72467abd9eeSHans de Goede 72567abd9eeSHans de Goede static const struct x86_cpu_id baytrail_cpu_ids[] = { 72667abd9eeSHans de Goede { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT, X86_FEATURE_ANY, }, 72767abd9eeSHans de Goede {} 72867abd9eeSHans de Goede }; 72967abd9eeSHans de Goede 73067abd9eeSHans de Goede static inline bool is_byt(void) 73167abd9eeSHans de Goede { 73267abd9eeSHans de Goede const struct x86_cpu_id *id = x86_match_cpu(baytrail_cpu_ids); 73367abd9eeSHans de Goede 73467abd9eeSHans de Goede return !!id; 73567abd9eeSHans de Goede } 73667abd9eeSHans de Goede 737a7d4b171SHans de Goede static const struct acpi_gpio_params first_gpio = { 0, 0, false }; 738a7d4b171SHans de Goede static const struct acpi_gpio_params second_gpio = { 1, 0, false }; 739a7d4b171SHans de Goede 740a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_first_gpios[] = { 741a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &first_gpio, 1 }, 742a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &second_gpio, 1 }, 743a7d4b171SHans de Goede { }, 744a7d4b171SHans de Goede }; 745a7d4b171SHans de Goede 746a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_last_gpios[] = { 747a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 748a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &second_gpio, 1 }, 749a7d4b171SHans de Goede { }, 750a7d4b171SHans de Goede }; 751a7d4b171SHans de Goede 752c5fca485SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_reset_only_gpios[] = { 753c5fca485SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 754c5fca485SHans de Goede { }, 755c5fca485SHans de Goede }; 756c5fca485SHans de Goede 757a7d4b171SHans de Goede static int goodix_resource(struct acpi_resource *ares, void *data) 758a7d4b171SHans de Goede { 759a7d4b171SHans de Goede struct goodix_ts_data *ts = data; 760a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 761a7d4b171SHans de Goede struct acpi_resource_gpio *gpio; 762a7d4b171SHans de Goede 763a7d4b171SHans de Goede switch (ares->type) { 764a7d4b171SHans de Goede case ACPI_RESOURCE_TYPE_GPIO: 765a7d4b171SHans de Goede gpio = &ares->data.gpio; 766a7d4b171SHans de Goede if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { 767a7d4b171SHans de Goede if (ts->gpio_int_idx == -1) { 768a7d4b171SHans de Goede ts->gpio_int_idx = ts->gpio_count; 769a7d4b171SHans de Goede } else { 770a7d4b171SHans de Goede dev_err(dev, "More then one GpioInt resource, ignoring ACPI GPIO resources\n"); 771a7d4b171SHans de Goede ts->gpio_int_idx = -2; 772a7d4b171SHans de Goede } 773a7d4b171SHans de Goede } 774a7d4b171SHans de Goede ts->gpio_count++; 775a7d4b171SHans de Goede break; 776a7d4b171SHans de Goede default: 777a7d4b171SHans de Goede break; 778a7d4b171SHans de Goede } 779a7d4b171SHans de Goede 780a7d4b171SHans de Goede return 0; 781a7d4b171SHans de Goede } 782a7d4b171SHans de Goede 783a7d4b171SHans de Goede /* 784a7d4b171SHans de Goede * This function gets called in case we fail to get the irq GPIO directly 785a7d4b171SHans de Goede * because the ACPI tables lack GPIO-name to APCI _CRS index mappings 786a7d4b171SHans de Goede * (no _DSD UUID daffd814-6eba-4d8c-8a91-bc9bbf4aa301 data). 787a7d4b171SHans de Goede * In that case we add our own mapping and then goodix_get_gpio_config() 788a7d4b171SHans de Goede * retries to get the GPIOs based on the added mapping. 789a7d4b171SHans de Goede */ 790a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 791a7d4b171SHans de Goede { 792a7d4b171SHans de Goede const struct acpi_gpio_mapping *gpio_mapping = NULL; 793a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 794a7d4b171SHans de Goede LIST_HEAD(resources); 795a7d4b171SHans de Goede int ret; 796a7d4b171SHans de Goede 797a7d4b171SHans de Goede ts->gpio_count = 0; 798a7d4b171SHans de Goede ts->gpio_int_idx = -1; 799a7d4b171SHans de Goede ret = acpi_dev_get_resources(ACPI_COMPANION(dev), &resources, 800a7d4b171SHans de Goede goodix_resource, ts); 801a7d4b171SHans de Goede if (ret < 0) { 802a7d4b171SHans de Goede dev_err(dev, "Error getting ACPI resources: %d\n", ret); 803a7d4b171SHans de Goede return ret; 804a7d4b171SHans de Goede } 805a7d4b171SHans de Goede 806a7d4b171SHans de Goede acpi_dev_free_resource_list(&resources); 807a7d4b171SHans de Goede 808a7d4b171SHans de Goede if (ts->gpio_count == 2 && ts->gpio_int_idx == 0) { 809a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 810a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_first_gpios; 811a7d4b171SHans de Goede } else if (ts->gpio_count == 2 && ts->gpio_int_idx == 1) { 812a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 813a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_last_gpios; 814c5fca485SHans de Goede } else if (ts->gpio_count == 1 && ts->gpio_int_idx == -1 && 815c5fca485SHans de Goede acpi_has_method(ACPI_HANDLE(dev), "INTI") && 816c5fca485SHans de Goede acpi_has_method(ACPI_HANDLE(dev), "INTO")) { 817c5fca485SHans de Goede dev_info(dev, "Using ACPI INTI and INTO methods for IRQ pin access\n"); 818c5fca485SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_METHOD; 819c5fca485SHans de Goede gpio_mapping = acpi_goodix_reset_only_gpios; 82067abd9eeSHans de Goede } else if (is_byt() && ts->gpio_count == 2 && ts->gpio_int_idx == -1) { 82167abd9eeSHans de Goede dev_info(dev, "No ACPI GpioInt resource, assuming that the GPIO order is reset, int\n"); 82267abd9eeSHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 82367abd9eeSHans de Goede gpio_mapping = acpi_goodix_int_last_gpios; 824a7d4b171SHans de Goede } else { 825a7d4b171SHans de Goede dev_warn(dev, "Unexpected ACPI resources: gpio_count %d, gpio_int_idx %d\n", 826a7d4b171SHans de Goede ts->gpio_count, ts->gpio_int_idx); 827a7d4b171SHans de Goede return -EINVAL; 828a7d4b171SHans de Goede } 829a7d4b171SHans de Goede 830a7d4b171SHans de Goede return devm_acpi_dev_add_driver_gpios(dev, gpio_mapping); 831a7d4b171SHans de Goede } 832a7d4b171SHans de Goede #else 833a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 834a7d4b171SHans de Goede { 835a7d4b171SHans de Goede return -EINVAL; 836a7d4b171SHans de Goede } 837a7d4b171SHans de Goede #endif /* CONFIG_X86 && CONFIG_ACPI */ 838a7d4b171SHans de Goede 839ec6e1b40SIrina Tirdea /** 840ec6e1b40SIrina Tirdea * goodix_get_gpio_config - Get GPIO config from ACPI/DT 841ec6e1b40SIrina Tirdea * 842ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 843ec6e1b40SIrina Tirdea */ 844ec6e1b40SIrina Tirdea static int goodix_get_gpio_config(struct goodix_ts_data *ts) 845ec6e1b40SIrina Tirdea { 846ec6e1b40SIrina Tirdea int error; 847ec6e1b40SIrina Tirdea struct device *dev; 848ec6e1b40SIrina Tirdea struct gpio_desc *gpiod; 849a7d4b171SHans de Goede bool added_acpi_mappings = false; 850ec6e1b40SIrina Tirdea 851ec6e1b40SIrina Tirdea if (!ts->client) 852ec6e1b40SIrina Tirdea return -EINVAL; 853ec6e1b40SIrina Tirdea dev = &ts->client->dev; 854ec6e1b40SIrina Tirdea 855ae97fb58SJagan Teki ts->avdd28 = devm_regulator_get(dev, "AVDD28"); 856ae97fb58SJagan Teki if (IS_ERR(ts->avdd28)) { 857ae97fb58SJagan Teki error = PTR_ERR(ts->avdd28); 858ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 859ae97fb58SJagan Teki dev_err(dev, 860ae97fb58SJagan Teki "Failed to get AVDD28 regulator: %d\n", error); 861ae97fb58SJagan Teki return error; 862ae97fb58SJagan Teki } 863ae97fb58SJagan Teki 864ae97fb58SJagan Teki ts->vddio = devm_regulator_get(dev, "VDDIO"); 865ae97fb58SJagan Teki if (IS_ERR(ts->vddio)) { 866ae97fb58SJagan Teki error = PTR_ERR(ts->vddio); 867ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 868ae97fb58SJagan Teki dev_err(dev, 869ae97fb58SJagan Teki "Failed to get VDDIO regulator: %d\n", error); 870ae97fb58SJagan Teki return error; 871ae97fb58SJagan Teki } 872ae97fb58SJagan Teki 873a7d4b171SHans de Goede retry_get_irq_gpio: 874ec6e1b40SIrina Tirdea /* Get the interrupt GPIO pin number */ 875ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN); 876ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 877ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 878ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 879ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 880ec6e1b40SIrina Tirdea GOODIX_GPIO_INT_NAME, error); 881ec6e1b40SIrina Tirdea return error; 882ec6e1b40SIrina Tirdea } 883a7d4b171SHans de Goede if (!gpiod && has_acpi_companion(dev) && !added_acpi_mappings) { 884a7d4b171SHans de Goede added_acpi_mappings = true; 885a7d4b171SHans de Goede if (goodix_add_acpi_gpio_mappings(ts) == 0) 886a7d4b171SHans de Goede goto retry_get_irq_gpio; 887a7d4b171SHans de Goede } 888ec6e1b40SIrina Tirdea 889ec6e1b40SIrina Tirdea ts->gpiod_int = gpiod; 890ec6e1b40SIrina Tirdea 891ec6e1b40SIrina Tirdea /* Get the reset line GPIO pin number */ 892ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, GPIOD_IN); 893ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 894ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 895ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 896ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 897ec6e1b40SIrina Tirdea GOODIX_GPIO_RST_NAME, error); 898ec6e1b40SIrina Tirdea return error; 899ec6e1b40SIrina Tirdea } 900ec6e1b40SIrina Tirdea 901ec6e1b40SIrina Tirdea ts->gpiod_rst = gpiod; 902ec6e1b40SIrina Tirdea 903a7d4b171SHans de Goede switch (ts->irq_pin_access_method) { 904a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 905a7d4b171SHans de Goede /* 906a7d4b171SHans de Goede * We end up here if goodix_add_acpi_gpio_mappings() has 907a7d4b171SHans de Goede * called devm_acpi_dev_add_driver_gpios() because the ACPI 908a7d4b171SHans de Goede * tables did not contain name to index mappings. 909a7d4b171SHans de Goede * Check that we successfully got both GPIOs after we've 910a7d4b171SHans de Goede * added our own acpi_gpio_mapping and if we did not get both 911a7d4b171SHans de Goede * GPIOs reset irq_pin_access_method to IRQ_PIN_ACCESS_NONE. 912a7d4b171SHans de Goede */ 913a7d4b171SHans de Goede if (!ts->gpiod_int || !ts->gpiod_rst) 914a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 915a7d4b171SHans de Goede break; 916c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 917c5fca485SHans de Goede if (!ts->gpiod_rst) 918c5fca485SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 919c5fca485SHans de Goede break; 920a7d4b171SHans de Goede default: 921e070a97bSHans de Goede if (ts->gpiod_int && ts->gpiod_rst) { 9221921daceSHans de Goede ts->reset_controller_at_probe = true; 923e070a97bSHans de Goede ts->load_cfg_from_disk = true; 92449db3997SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_GPIO; 925e070a97bSHans de Goede } 926a7d4b171SHans de Goede } 92749db3997SHans de Goede 928ec6e1b40SIrina Tirdea return 0; 929ec6e1b40SIrina Tirdea } 930ec6e1b40SIrina Tirdea 931ca96ea86SBastien Nocera /** 932ca96ea86SBastien Nocera * goodix_read_config - Read the embedded configuration of the panel 933ca96ea86SBastien Nocera * 934ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 935ca96ea86SBastien Nocera * 936ca96ea86SBastien Nocera * Must be called during probe 937ca96ea86SBastien Nocera */ 938ca96ea86SBastien Nocera static void goodix_read_config(struct goodix_ts_data *ts) 939ca96ea86SBastien Nocera { 940fafef982SMarcin Niestroj int x_max, y_max; 941ca96ea86SBastien Nocera int error; 942ca96ea86SBastien Nocera 94325309004SMarcin Niestroj error = goodix_i2c_read(ts->client, ts->chip->config_addr, 944de956caeSHans de Goede ts->config, ts->chip->config_len); 945ca96ea86SBastien Nocera if (error) { 946ca96ea86SBastien Nocera ts->int_trigger_type = GOODIX_INT_TRIGGER; 947a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 948ca96ea86SBastien Nocera return; 949ca96ea86SBastien Nocera } 950ca96ea86SBastien Nocera 951de956caeSHans de Goede ts->int_trigger_type = ts->config[TRIGGER_LOC] & 0x03; 952de956caeSHans de Goede ts->max_touch_num = ts->config[MAX_CONTACTS_LOC] & 0x0f; 9538b5a359cSBastien Nocera 954de956caeSHans de Goede x_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC]); 955de956caeSHans de Goede y_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC + 2]); 956fafef982SMarcin Niestroj if (x_max && y_max) { 957fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_X, x_max - 1); 958fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_Y, y_max - 1); 959ca96ea86SBastien Nocera } 960de956caeSHans de Goede 961de956caeSHans de Goede ts->chip->calc_config_checksum(ts); 96257c80e8eSKarsten Merker } 963ca96ea86SBastien Nocera 964ca96ea86SBastien Nocera /** 965ca96ea86SBastien Nocera * goodix_read_version - Read goodix touchscreen version 966ca96ea86SBastien Nocera * 96768caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 968ca96ea86SBastien Nocera */ 96968caf858SIrina Tirdea static int goodix_read_version(struct goodix_ts_data *ts) 970ca96ea86SBastien Nocera { 971ca96ea86SBastien Nocera int error; 972ca96ea86SBastien Nocera u8 buf[6]; 973cae102e2SIcenowy Zheng char id_str[GOODIX_ID_MAX_LEN + 1]; 974ca96ea86SBastien Nocera 97568caf858SIrina Tirdea error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf)); 9767642f29cSHans de Goede if (error) 977ca96ea86SBastien Nocera return error; 978ca96ea86SBastien Nocera 979cae102e2SIcenowy Zheng memcpy(id_str, buf, GOODIX_ID_MAX_LEN); 980cae102e2SIcenowy Zheng id_str[GOODIX_ID_MAX_LEN] = 0; 981cae102e2SIcenowy Zheng strscpy(ts->id, id_str, GOODIX_ID_MAX_LEN + 1); 982e70b0307SIrina Tirdea 98368caf858SIrina Tirdea ts->version = get_unaligned_le16(&buf[4]); 984ca96ea86SBastien Nocera 985cae102e2SIcenowy Zheng dev_info(&ts->client->dev, "ID %s, version: %04x\n", ts->id, 98668caf858SIrina Tirdea ts->version); 987ca96ea86SBastien Nocera 988ca96ea86SBastien Nocera return 0; 989ca96ea86SBastien Nocera } 990ca96ea86SBastien Nocera 991ca96ea86SBastien Nocera /** 992ca96ea86SBastien Nocera * goodix_i2c_test - I2C test function to check if the device answers. 993ca96ea86SBastien Nocera * 994ca96ea86SBastien Nocera * @client: the i2c client 995ca96ea86SBastien Nocera */ 996ca96ea86SBastien Nocera static int goodix_i2c_test(struct i2c_client *client) 997ca96ea86SBastien Nocera { 998ca96ea86SBastien Nocera int retry = 0; 999ca96ea86SBastien Nocera int error; 1000ca96ea86SBastien Nocera u8 test; 1001ca96ea86SBastien Nocera 1002ca96ea86SBastien Nocera while (retry++ < 2) { 10037642f29cSHans de Goede error = goodix_i2c_read(client, GOODIX_REG_ID, &test, 1); 1004ca96ea86SBastien Nocera if (!error) 1005ca96ea86SBastien Nocera return 0; 1006ca96ea86SBastien Nocera 1007ca96ea86SBastien Nocera msleep(20); 1008ca96ea86SBastien Nocera } 1009ca96ea86SBastien Nocera 1010ca96ea86SBastien Nocera return error; 1011ca96ea86SBastien Nocera } 1012ca96ea86SBastien Nocera 1013ca96ea86SBastien Nocera /** 101468caf858SIrina Tirdea * goodix_configure_dev - Finish device initialization 101568caf858SIrina Tirdea * 101668caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 101768caf858SIrina Tirdea * 101868caf858SIrina Tirdea * Must be called from probe to finish initialization of the device. 101968caf858SIrina Tirdea * Contains the common initialization code for both devices that 102068caf858SIrina Tirdea * declare gpio pins and devices that do not. It is either called 102168caf858SIrina Tirdea * directly from probe or from request_firmware_wait callback. 102268caf858SIrina Tirdea */ 102368caf858SIrina Tirdea static int goodix_configure_dev(struct goodix_ts_data *ts) 102468caf858SIrina Tirdea { 102568caf858SIrina Tirdea int error; 1026492ee52cSDmitry Mastykin int i; 102768caf858SIrina Tirdea 1028fafef982SMarcin Niestroj ts->int_trigger_type = GOODIX_INT_TRIGGER; 1029fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 1030ad48cf5eSKarsten Merker 1031fafef982SMarcin Niestroj ts->input_dev = devm_input_allocate_device(&ts->client->dev); 1032fafef982SMarcin Niestroj if (!ts->input_dev) { 1033fafef982SMarcin Niestroj dev_err(&ts->client->dev, "Failed to allocate input device."); 1034fafef982SMarcin Niestroj return -ENOMEM; 1035fafef982SMarcin Niestroj } 1036fafef982SMarcin Niestroj 1037fafef982SMarcin Niestroj ts->input_dev->name = "Goodix Capacitive TouchScreen"; 1038fafef982SMarcin Niestroj ts->input_dev->phys = "input/ts"; 1039fafef982SMarcin Niestroj ts->input_dev->id.bustype = BUS_I2C; 1040fafef982SMarcin Niestroj ts->input_dev->id.vendor = 0x0416; 1041cae102e2SIcenowy Zheng if (kstrtou16(ts->id, 10, &ts->input_dev->id.product)) 1042cae102e2SIcenowy Zheng ts->input_dev->id.product = 0x1001; 1043fafef982SMarcin Niestroj ts->input_dev->id.version = ts->version; 1044fafef982SMarcin Niestroj 1045492ee52cSDmitry Mastykin ts->input_dev->keycode = ts->keymap; 1046492ee52cSDmitry Mastykin ts->input_dev->keycodesize = sizeof(ts->keymap[0]); 1047492ee52cSDmitry Mastykin ts->input_dev->keycodemax = GOODIX_MAX_KEYS; 1048492ee52cSDmitry Mastykin 1049fafef982SMarcin Niestroj /* Capacitive Windows/Home button on some devices */ 1050492ee52cSDmitry Mastykin for (i = 0; i < GOODIX_MAX_KEYS; ++i) { 1051492ee52cSDmitry Mastykin if (i == 0) 1052492ee52cSDmitry Mastykin ts->keymap[i] = KEY_LEFTMETA; 1053492ee52cSDmitry Mastykin else 1054492ee52cSDmitry Mastykin ts->keymap[i] = KEY_F1 + (i - 1); 1055492ee52cSDmitry Mastykin 1056492ee52cSDmitry Mastykin input_set_capability(ts->input_dev, EV_KEY, ts->keymap[i]); 1057492ee52cSDmitry Mastykin } 1058fafef982SMarcin Niestroj 1059fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X); 1060fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y); 1061fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 1062fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 1063fafef982SMarcin Niestroj 1064fafef982SMarcin Niestroj /* Read configuration and apply touchscreen parameters */ 106568caf858SIrina Tirdea goodix_read_config(ts); 106668caf858SIrina Tirdea 1067fafef982SMarcin Niestroj /* Try overriding touchscreen parameters via device properties */ 1068fafef982SMarcin Niestroj touchscreen_parse_properties(ts->input_dev, true, &ts->prop); 1069fafef982SMarcin Niestroj 1070fafef982SMarcin Niestroj if (!ts->prop.max_x || !ts->prop.max_y || !ts->max_touch_num) { 1071c1c00aa5SGuido Günther dev_err(&ts->client->dev, 1072c1c00aa5SGuido Günther "Invalid config (%d, %d, %d), using defaults\n", 1073c1c00aa5SGuido Günther ts->prop.max_x, ts->prop.max_y, ts->max_touch_num); 1074fafef982SMarcin Niestroj ts->prop.max_x = GOODIX_MAX_WIDTH - 1; 1075fafef982SMarcin Niestroj ts->prop.max_y = GOODIX_MAX_HEIGHT - 1; 1076fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 1077fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 1078fafef982SMarcin Niestroj ABS_MT_POSITION_X, ts->prop.max_x); 1079fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 1080fafef982SMarcin Niestroj ABS_MT_POSITION_Y, ts->prop.max_y); 1081fafef982SMarcin Niestroj } 1082fafef982SMarcin Niestroj 1083fafef982SMarcin Niestroj if (dmi_check_system(rotated_screen)) { 1084fafef982SMarcin Niestroj ts->prop.invert_x = true; 1085fafef982SMarcin Niestroj ts->prop.invert_y = true; 1086fafef982SMarcin Niestroj dev_dbg(&ts->client->dev, 1087fafef982SMarcin Niestroj "Applying '180 degrees rotated screen' quirk\n"); 1088fafef982SMarcin Niestroj } 1089fafef982SMarcin Niestroj 1090bd3b8480SYauhen Kharuzhy if (dmi_check_system(nine_bytes_report)) { 1091bd3b8480SYauhen Kharuzhy ts->contact_size = 9; 1092bd3b8480SYauhen Kharuzhy 1093bd3b8480SYauhen Kharuzhy dev_dbg(&ts->client->dev, 1094bd3b8480SYauhen Kharuzhy "Non-standard 9-bytes report format quirk\n"); 1095bd3b8480SYauhen Kharuzhy } 1096bd3b8480SYauhen Kharuzhy 10971dd5ddc1SSergei A. Trusov if (dmi_check_system(inverted_x_screen)) { 10981dd5ddc1SSergei A. Trusov ts->prop.invert_x = true; 10991dd5ddc1SSergei A. Trusov dev_dbg(&ts->client->dev, 11001dd5ddc1SSergei A. Trusov "Applying 'inverted x screen' quirk\n"); 11011dd5ddc1SSergei A. Trusov } 11021dd5ddc1SSergei A. Trusov 1103fafef982SMarcin Niestroj error = input_mt_init_slots(ts->input_dev, ts->max_touch_num, 1104fafef982SMarcin Niestroj INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); 1105fafef982SMarcin Niestroj if (error) { 1106fafef982SMarcin Niestroj dev_err(&ts->client->dev, 1107fafef982SMarcin Niestroj "Failed to initialize MT slots: %d", error); 110868caf858SIrina Tirdea return error; 1109fafef982SMarcin Niestroj } 1110fafef982SMarcin Niestroj 1111fafef982SMarcin Niestroj error = input_register_device(ts->input_dev); 1112fafef982SMarcin Niestroj if (error) { 1113fafef982SMarcin Niestroj dev_err(&ts->client->dev, 1114fafef982SMarcin Niestroj "Failed to register input device: %d", error); 1115fafef982SMarcin Niestroj return error; 1116fafef982SMarcin Niestroj } 111768caf858SIrina Tirdea 11185ab09d6aSIrina Tirdea ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT; 11195ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 112068caf858SIrina Tirdea if (error) { 112168caf858SIrina Tirdea dev_err(&ts->client->dev, "request IRQ failed: %d\n", error); 112268caf858SIrina Tirdea return error; 112368caf858SIrina Tirdea } 112468caf858SIrina Tirdea 112568caf858SIrina Tirdea return 0; 112668caf858SIrina Tirdea } 112768caf858SIrina Tirdea 112868caf858SIrina Tirdea /** 112968caf858SIrina Tirdea * goodix_config_cb - Callback to finish device init 113068caf858SIrina Tirdea * 1131cb690465SLee Jones * @cfg: firmware config 1132584da78cSLee Jones * @ctx: our goodix_ts_data pointer 113368caf858SIrina Tirdea * 113468caf858SIrina Tirdea * request_firmware_wait callback that finishes 113568caf858SIrina Tirdea * initialization of the device. 113668caf858SIrina Tirdea */ 113768caf858SIrina Tirdea static void goodix_config_cb(const struct firmware *cfg, void *ctx) 113868caf858SIrina Tirdea { 113968caf858SIrina Tirdea struct goodix_ts_data *ts = ctx; 114068caf858SIrina Tirdea int error; 114168caf858SIrina Tirdea 114268caf858SIrina Tirdea if (cfg) { 114368caf858SIrina Tirdea /* send device configuration to the firmware */ 11441a67448fSHans de Goede error = goodix_send_cfg(ts, cfg->data, cfg->size); 114568caf858SIrina Tirdea if (error) 114668caf858SIrina Tirdea goto err_release_cfg; 114768caf858SIrina Tirdea } 114868caf858SIrina Tirdea 114968caf858SIrina Tirdea goodix_configure_dev(ts); 115068caf858SIrina Tirdea 115168caf858SIrina Tirdea err_release_cfg: 115268caf858SIrina Tirdea release_firmware(cfg); 115368caf858SIrina Tirdea complete_all(&ts->firmware_loading_complete); 115468caf858SIrina Tirdea } 115568caf858SIrina Tirdea 1156ae97fb58SJagan Teki static void goodix_disable_regulators(void *arg) 1157ae97fb58SJagan Teki { 1158ae97fb58SJagan Teki struct goodix_ts_data *ts = arg; 1159ae97fb58SJagan Teki 1160ae97fb58SJagan Teki regulator_disable(ts->vddio); 1161ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1162ae97fb58SJagan Teki } 1163ae97fb58SJagan Teki 1164ca96ea86SBastien Nocera static int goodix_ts_probe(struct i2c_client *client, 1165ca96ea86SBastien Nocera const struct i2c_device_id *id) 1166ca96ea86SBastien Nocera { 1167ca96ea86SBastien Nocera struct goodix_ts_data *ts; 1168*20e31722SHans de Goede const char *cfg_name; 1169ca96ea86SBastien Nocera int error; 1170ca96ea86SBastien Nocera 1171ca96ea86SBastien Nocera dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr); 1172ca96ea86SBastien Nocera 1173ca96ea86SBastien Nocera if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 1174ca96ea86SBastien Nocera dev_err(&client->dev, "I2C check functionality failed.\n"); 1175ca96ea86SBastien Nocera return -ENXIO; 1176ca96ea86SBastien Nocera } 1177ca96ea86SBastien Nocera 1178ca96ea86SBastien Nocera ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); 1179ca96ea86SBastien Nocera if (!ts) 1180ca96ea86SBastien Nocera return -ENOMEM; 1181ca96ea86SBastien Nocera 1182ca96ea86SBastien Nocera ts->client = client; 1183ca96ea86SBastien Nocera i2c_set_clientdata(client, ts); 118468caf858SIrina Tirdea init_completion(&ts->firmware_loading_complete); 1185bd3b8480SYauhen Kharuzhy ts->contact_size = GOODIX_CONTACT_SIZE; 1186ca96ea86SBastien Nocera 1187ec6e1b40SIrina Tirdea error = goodix_get_gpio_config(ts); 1188ec6e1b40SIrina Tirdea if (error) 1189ec6e1b40SIrina Tirdea return error; 1190ec6e1b40SIrina Tirdea 1191ae97fb58SJagan Teki /* power up the controller */ 1192ae97fb58SJagan Teki error = regulator_enable(ts->avdd28); 1193ae97fb58SJagan Teki if (error) { 1194ae97fb58SJagan Teki dev_err(&client->dev, 1195ae97fb58SJagan Teki "Failed to enable AVDD28 regulator: %d\n", 1196ae97fb58SJagan Teki error); 1197ae97fb58SJagan Teki return error; 1198ae97fb58SJagan Teki } 1199ae97fb58SJagan Teki 1200ae97fb58SJagan Teki error = regulator_enable(ts->vddio); 1201ae97fb58SJagan Teki if (error) { 1202ae97fb58SJagan Teki dev_err(&client->dev, 1203ae97fb58SJagan Teki "Failed to enable VDDIO regulator: %d\n", 1204ae97fb58SJagan Teki error); 1205ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1206ae97fb58SJagan Teki return error; 1207ae97fb58SJagan Teki } 1208ae97fb58SJagan Teki 1209ae97fb58SJagan Teki error = devm_add_action_or_reset(&client->dev, 1210ae97fb58SJagan Teki goodix_disable_regulators, ts); 1211ae97fb58SJagan Teki if (error) 1212ae97fb58SJagan Teki return error; 1213ae97fb58SJagan Teki 12149e1f2d70SHans de Goede reset: 12151921daceSHans de Goede if (ts->reset_controller_at_probe) { 1216ec6e1b40SIrina Tirdea /* reset the controller */ 1217ec6e1b40SIrina Tirdea error = goodix_reset(ts); 1218209bda47SHans de Goede if (error) 1219ec6e1b40SIrina Tirdea return error; 1220ec6e1b40SIrina Tirdea } 1221ec6e1b40SIrina Tirdea 1222ca96ea86SBastien Nocera error = goodix_i2c_test(client); 1223ca96ea86SBastien Nocera if (error) { 12249e1f2d70SHans de Goede if (!ts->reset_controller_at_probe && 12259e1f2d70SHans de Goede ts->irq_pin_access_method != IRQ_PIN_ACCESS_NONE) { 12269e1f2d70SHans de Goede /* Retry after a controller reset */ 12279e1f2d70SHans de Goede ts->reset_controller_at_probe = true; 12289e1f2d70SHans de Goede goto reset; 12299e1f2d70SHans de Goede } 1230ca96ea86SBastien Nocera dev_err(&client->dev, "I2C communication failure: %d\n", error); 1231ca96ea86SBastien Nocera return error; 1232ca96ea86SBastien Nocera } 1233ca96ea86SBastien Nocera 123468caf858SIrina Tirdea error = goodix_read_version(ts); 12357642f29cSHans de Goede if (error) 1236ca96ea86SBastien Nocera return error; 1237ca96ea86SBastien Nocera 123825309004SMarcin Niestroj ts->chip = goodix_get_chip_data(ts->id); 1239a779fbc6SIrina Tirdea 1240e070a97bSHans de Goede if (ts->load_cfg_from_disk) { 124168caf858SIrina Tirdea /* update device config */ 1242*20e31722SHans de Goede error = device_property_read_string(&client->dev, 1243*20e31722SHans de Goede "goodix,config-name", 1244*20e31722SHans de Goede &cfg_name); 1245*20e31722SHans de Goede if (!error) 1246*20e31722SHans de Goede snprintf(ts->cfg_name, sizeof(ts->cfg_name), 1247*20e31722SHans de Goede "goodix/%s", cfg_name); 1248*20e31722SHans de Goede else 1249*20e31722SHans de Goede snprintf(ts->cfg_name, sizeof(ts->cfg_name), 1250cae102e2SIcenowy Zheng "goodix_%s_cfg.bin", ts->id); 1251ca96ea86SBastien Nocera 125268caf858SIrina Tirdea error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name, 125368caf858SIrina Tirdea &client->dev, GFP_KERNEL, ts, 125468caf858SIrina Tirdea goodix_config_cb); 1255ca96ea86SBastien Nocera if (error) { 125668caf858SIrina Tirdea dev_err(&client->dev, 125768caf858SIrina Tirdea "Failed to invoke firmware loader: %d\n", 125868caf858SIrina Tirdea error); 1259ca96ea86SBastien Nocera return error; 1260ca96ea86SBastien Nocera } 1261ca96ea86SBastien Nocera 1262ca96ea86SBastien Nocera return 0; 126368caf858SIrina Tirdea } else { 126468caf858SIrina Tirdea error = goodix_configure_dev(ts); 126568caf858SIrina Tirdea if (error) 126668caf858SIrina Tirdea return error; 126768caf858SIrina Tirdea } 126868caf858SIrina Tirdea 126968caf858SIrina Tirdea return 0; 127068caf858SIrina Tirdea } 127168caf858SIrina Tirdea 127268caf858SIrina Tirdea static int goodix_ts_remove(struct i2c_client *client) 127368caf858SIrina Tirdea { 127468caf858SIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 127568caf858SIrina Tirdea 1276e070a97bSHans de Goede if (ts->load_cfg_from_disk) 127768caf858SIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 127868caf858SIrina Tirdea 127968caf858SIrina Tirdea return 0; 1280ca96ea86SBastien Nocera } 1281ca96ea86SBastien Nocera 12825ab09d6aSIrina Tirdea static int __maybe_unused goodix_suspend(struct device *dev) 12835ab09d6aSIrina Tirdea { 12845ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 12855ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 12865ab09d6aSIrina Tirdea int error; 12875ab09d6aSIrina Tirdea 1288e070a97bSHans de Goede if (ts->load_cfg_from_disk) 1289e070a97bSHans de Goede wait_for_completion(&ts->firmware_loading_complete); 1290e070a97bSHans de Goede 12915ab09d6aSIrina Tirdea /* We need gpio pins to suspend/resume */ 129249db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1293faec44b6SHans de Goede disable_irq(client->irq); 12945ab09d6aSIrina Tirdea return 0; 1295faec44b6SHans de Goede } 12965ab09d6aSIrina Tirdea 12975ab09d6aSIrina Tirdea /* Free IRQ as IRQ pin is used as output in the suspend sequence */ 12985ab09d6aSIrina Tirdea goodix_free_irq(ts); 12995ab09d6aSIrina Tirdea 13005ab09d6aSIrina Tirdea /* Output LOW on the INT pin for 5 ms */ 130149db3997SHans de Goede error = goodix_irq_direction_output(ts, 0); 13025ab09d6aSIrina Tirdea if (error) { 13035ab09d6aSIrina Tirdea goodix_request_irq(ts); 13045ab09d6aSIrina Tirdea return error; 13055ab09d6aSIrina Tirdea } 13065ab09d6aSIrina Tirdea 13075ab09d6aSIrina Tirdea usleep_range(5000, 6000); 13085ab09d6aSIrina Tirdea 13095ab09d6aSIrina Tirdea error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND, 13105ab09d6aSIrina Tirdea GOODIX_CMD_SCREEN_OFF); 13115ab09d6aSIrina Tirdea if (error) { 131249db3997SHans de Goede goodix_irq_direction_input(ts); 13135ab09d6aSIrina Tirdea goodix_request_irq(ts); 13145ab09d6aSIrina Tirdea return -EAGAIN; 13155ab09d6aSIrina Tirdea } 13165ab09d6aSIrina Tirdea 13175ab09d6aSIrina Tirdea /* 13185ab09d6aSIrina Tirdea * The datasheet specifies that the interval between sending screen-off 13195ab09d6aSIrina Tirdea * command and wake-up should be longer than 58 ms. To avoid waking up 13205ab09d6aSIrina Tirdea * sooner, delay 58ms here. 13215ab09d6aSIrina Tirdea */ 13225ab09d6aSIrina Tirdea msleep(58); 13235ab09d6aSIrina Tirdea return 0; 13245ab09d6aSIrina Tirdea } 13255ab09d6aSIrina Tirdea 13265ab09d6aSIrina Tirdea static int __maybe_unused goodix_resume(struct device *dev) 13275ab09d6aSIrina Tirdea { 13285ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 13295ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 1330273ec6bdSHans de Goede u8 config_ver; 13315ab09d6aSIrina Tirdea int error; 13325ab09d6aSIrina Tirdea 133349db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1334faec44b6SHans de Goede enable_irq(client->irq); 13355ab09d6aSIrina Tirdea return 0; 1336faec44b6SHans de Goede } 13375ab09d6aSIrina Tirdea 13385ab09d6aSIrina Tirdea /* 13395ab09d6aSIrina Tirdea * Exit sleep mode by outputting HIGH level to INT pin 13405ab09d6aSIrina Tirdea * for 2ms~5ms. 13415ab09d6aSIrina Tirdea */ 134249db3997SHans de Goede error = goodix_irq_direction_output(ts, 1); 13435ab09d6aSIrina Tirdea if (error) 13445ab09d6aSIrina Tirdea return error; 13455ab09d6aSIrina Tirdea 13465ab09d6aSIrina Tirdea usleep_range(2000, 5000); 13475ab09d6aSIrina Tirdea 13485ab09d6aSIrina Tirdea error = goodix_int_sync(ts); 13495ab09d6aSIrina Tirdea if (error) 13505ab09d6aSIrina Tirdea return error; 13515ab09d6aSIrina Tirdea 1352273ec6bdSHans de Goede error = goodix_i2c_read(ts->client, ts->chip->config_addr, 1353273ec6bdSHans de Goede &config_ver, 1); 13547642f29cSHans de Goede if (!error && config_ver != ts->config[0]) 1355273ec6bdSHans de Goede dev_info(dev, "Config version mismatch %d != %d, resetting controller\n", 1356273ec6bdSHans de Goede config_ver, ts->config[0]); 1357273ec6bdSHans de Goede 1358273ec6bdSHans de Goede if (error != 0 || config_ver != ts->config[0]) { 1359273ec6bdSHans de Goede error = goodix_reset(ts); 1360209bda47SHans de Goede if (error) 1361273ec6bdSHans de Goede return error; 1362273ec6bdSHans de Goede 1363273ec6bdSHans de Goede error = goodix_send_cfg(ts, ts->config, ts->chip->config_len); 1364273ec6bdSHans de Goede if (error) 1365273ec6bdSHans de Goede return error; 1366273ec6bdSHans de Goede } 1367273ec6bdSHans de Goede 13685ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 13695ab09d6aSIrina Tirdea if (error) 13705ab09d6aSIrina Tirdea return error; 13715ab09d6aSIrina Tirdea 13725ab09d6aSIrina Tirdea return 0; 13735ab09d6aSIrina Tirdea } 13745ab09d6aSIrina Tirdea 13755ab09d6aSIrina Tirdea static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume); 13765ab09d6aSIrina Tirdea 1377ca96ea86SBastien Nocera static const struct i2c_device_id goodix_ts_id[] = { 1378ca96ea86SBastien Nocera { "GDIX1001:00", 0 }, 1379ca96ea86SBastien Nocera { } 1380ca96ea86SBastien Nocera }; 13812e9e910eSJavier Martinez Canillas MODULE_DEVICE_TABLE(i2c, goodix_ts_id); 1382ca96ea86SBastien Nocera 1383771d8f1bSAleksei Mamlin #ifdef CONFIG_ACPI 1384ca96ea86SBastien Nocera static const struct acpi_device_id goodix_acpi_match[] = { 1385ca96ea86SBastien Nocera { "GDIX1001", 0 }, 13865ca4d1aeSEthan Lee { "GDIX1002", 0 }, 1387ca96ea86SBastien Nocera { } 1388ca96ea86SBastien Nocera }; 1389ca96ea86SBastien Nocera MODULE_DEVICE_TABLE(acpi, goodix_acpi_match); 1390771d8f1bSAleksei Mamlin #endif 1391771d8f1bSAleksei Mamlin 1392771d8f1bSAleksei Mamlin #ifdef CONFIG_OF 1393771d8f1bSAleksei Mamlin static const struct of_device_id goodix_of_match[] = { 139425309004SMarcin Niestroj { .compatible = "goodix,gt1151" }, 1395a5f50c50SJagan Teki { .compatible = "goodix,gt5663" }, 139684ef1b33SGuido Günther { .compatible = "goodix,gt5688" }, 1397771d8f1bSAleksei Mamlin { .compatible = "goodix,gt911" }, 1398771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9110" }, 1399771d8f1bSAleksei Mamlin { .compatible = "goodix,gt912" }, 1400b9a1c116SYannick Fertre { .compatible = "goodix,gt9147" }, 1401b5e458afSIcenowy Zheng { .compatible = "goodix,gt917s" }, 1402771d8f1bSAleksei Mamlin { .compatible = "goodix,gt927" }, 1403771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9271" }, 1404771d8f1bSAleksei Mamlin { .compatible = "goodix,gt928" }, 14052dce6db7SAngeloGioacchino Del Regno { .compatible = "goodix,gt9286" }, 1406771d8f1bSAleksei Mamlin { .compatible = "goodix,gt967" }, 1407771d8f1bSAleksei Mamlin { } 1408771d8f1bSAleksei Mamlin }; 1409771d8f1bSAleksei Mamlin MODULE_DEVICE_TABLE(of, goodix_of_match); 1410771d8f1bSAleksei Mamlin #endif 1411ca96ea86SBastien Nocera 1412ca96ea86SBastien Nocera static struct i2c_driver goodix_ts_driver = { 1413ca96ea86SBastien Nocera .probe = goodix_ts_probe, 141468caf858SIrina Tirdea .remove = goodix_ts_remove, 1415ca96ea86SBastien Nocera .id_table = goodix_ts_id, 1416ca96ea86SBastien Nocera .driver = { 1417ca96ea86SBastien Nocera .name = "Goodix-TS", 1418771d8f1bSAleksei Mamlin .acpi_match_table = ACPI_PTR(goodix_acpi_match), 1419771d8f1bSAleksei Mamlin .of_match_table = of_match_ptr(goodix_of_match), 14205ab09d6aSIrina Tirdea .pm = &goodix_pm_ops, 1421ca96ea86SBastien Nocera }, 1422ca96ea86SBastien Nocera }; 1423ca96ea86SBastien Nocera module_i2c_driver(goodix_ts_driver); 1424ca96ea86SBastien Nocera 1425ca96ea86SBastien Nocera MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); 1426ca96ea86SBastien Nocera MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>"); 1427ca96ea86SBastien Nocera MODULE_DESCRIPTION("Goodix touchscreen driver"); 1428ca96ea86SBastien Nocera MODULE_LICENSE("GPL v2"); 1429