1b886d83cSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2ca96ea86SBastien Nocera /* 3ca96ea86SBastien Nocera * Driver for Goodix Touchscreens 4ca96ea86SBastien Nocera * 5ca96ea86SBastien Nocera * Copyright (c) 2014 Red Hat Inc. 6ad48cf5eSKarsten Merker * Copyright (c) 2015 K. Merker <merker@debian.org> 7ca96ea86SBastien Nocera * 8ca96ea86SBastien Nocera * This code is based on gt9xx.c authored by andrew@goodix.com: 9ca96ea86SBastien Nocera * 10ca96ea86SBastien Nocera * 2010 - 2012 Goodix Technology. 11ca96ea86SBastien Nocera */ 12ca96ea86SBastien Nocera 13ca96ea86SBastien Nocera 14ca96ea86SBastien Nocera #include <linux/kernel.h> 158b5a359cSBastien Nocera #include <linux/dmi.h> 1668caf858SIrina Tirdea #include <linux/firmware.h> 17ec6e1b40SIrina Tirdea #include <linux/gpio/consumer.h> 18ca96ea86SBastien Nocera #include <linux/i2c.h> 19ca96ea86SBastien Nocera #include <linux/input.h> 20ca96ea86SBastien Nocera #include <linux/input/mt.h> 21fafef982SMarcin Niestroj #include <linux/input/touchscreen.h> 22ca96ea86SBastien Nocera #include <linux/module.h> 23ca96ea86SBastien Nocera #include <linux/delay.h> 24ca96ea86SBastien Nocera #include <linux/irq.h> 25ca96ea86SBastien Nocera #include <linux/interrupt.h> 26ae97fb58SJagan Teki #include <linux/regulator/consumer.h> 27ca96ea86SBastien Nocera #include <linux/slab.h> 28771d8f1bSAleksei Mamlin #include <linux/acpi.h> 29771d8f1bSAleksei Mamlin #include <linux/of.h> 30ca96ea86SBastien Nocera #include <asm/unaligned.h> 31ca96ea86SBastien Nocera 3225309004SMarcin Niestroj struct goodix_ts_data; 3325309004SMarcin Niestroj 3425309004SMarcin Niestroj struct goodix_chip_data { 3525309004SMarcin Niestroj u16 config_addr; 3625309004SMarcin Niestroj int config_len; 3725309004SMarcin Niestroj int (*check_config)(struct goodix_ts_data *, const struct firmware *); 3825309004SMarcin Niestroj }; 3925309004SMarcin Niestroj 40ca96ea86SBastien Nocera struct goodix_ts_data { 41ca96ea86SBastien Nocera struct i2c_client *client; 42ca96ea86SBastien Nocera struct input_dev *input_dev; 4325309004SMarcin Niestroj const struct goodix_chip_data *chip; 44fafef982SMarcin Niestroj struct touchscreen_properties prop; 45ca96ea86SBastien Nocera unsigned int max_touch_num; 46ca96ea86SBastien Nocera unsigned int int_trigger_type; 47ae97fb58SJagan Teki struct regulator *avdd28; 48ae97fb58SJagan Teki struct regulator *vddio; 49ec6e1b40SIrina Tirdea struct gpio_desc *gpiod_int; 50ec6e1b40SIrina Tirdea struct gpio_desc *gpiod_rst; 5168caf858SIrina Tirdea u16 id; 5268caf858SIrina Tirdea u16 version; 5368caf858SIrina Tirdea const char *cfg_name; 5468caf858SIrina Tirdea struct completion firmware_loading_complete; 555ab09d6aSIrina Tirdea unsigned long irq_flags; 56bd3b8480SYauhen Kharuzhy unsigned int contact_size; 57ca96ea86SBastien Nocera }; 58ca96ea86SBastien Nocera 59ec6e1b40SIrina Tirdea #define GOODIX_GPIO_INT_NAME "irq" 60ec6e1b40SIrina Tirdea #define GOODIX_GPIO_RST_NAME "reset" 61ec6e1b40SIrina Tirdea 62ca96ea86SBastien Nocera #define GOODIX_MAX_HEIGHT 4096 63ca96ea86SBastien Nocera #define GOODIX_MAX_WIDTH 4096 64ca96ea86SBastien Nocera #define GOODIX_INT_TRIGGER 1 65ca96ea86SBastien Nocera #define GOODIX_CONTACT_SIZE 8 66bd3b8480SYauhen Kharuzhy #define GOODIX_MAX_CONTACT_SIZE 9 67ca96ea86SBastien Nocera #define GOODIX_MAX_CONTACTS 10 68ca96ea86SBastien Nocera 69ca96ea86SBastien Nocera #define GOODIX_CONFIG_MAX_LENGTH 240 70a779fbc6SIrina Tirdea #define GOODIX_CONFIG_911_LENGTH 186 71a779fbc6SIrina Tirdea #define GOODIX_CONFIG_967_LENGTH 228 72ca96ea86SBastien Nocera 73ca96ea86SBastien Nocera /* Register defines */ 745ab09d6aSIrina Tirdea #define GOODIX_REG_COMMAND 0x8040 755ab09d6aSIrina Tirdea #define GOODIX_CMD_SCREEN_OFF 0x05 765ab09d6aSIrina Tirdea 77ca96ea86SBastien Nocera #define GOODIX_READ_COOR_ADDR 0x814E 7825309004SMarcin Niestroj #define GOODIX_GT1X_REG_CONFIG_DATA 0x8050 7925309004SMarcin Niestroj #define GOODIX_GT9X_REG_CONFIG_DATA 0x8047 80e70b0307SIrina Tirdea #define GOODIX_REG_ID 0x8140 81ca96ea86SBastien Nocera 829b5db7aaSPaul Cercueil #define GOODIX_BUFFER_STATUS_READY BIT(7) 839b5db7aaSPaul Cercueil #define GOODIX_BUFFER_STATUS_TIMEOUT 20 849b5db7aaSPaul Cercueil 85ca96ea86SBastien Nocera #define RESOLUTION_LOC 1 86a7ac7c95SAleksei Mamlin #define MAX_CONTACTS_LOC 5 87ca96ea86SBastien Nocera #define TRIGGER_LOC 6 88ca96ea86SBastien Nocera 8925309004SMarcin Niestroj static int goodix_check_cfg_8(struct goodix_ts_data *ts, 9025309004SMarcin Niestroj const struct firmware *cfg); 9125309004SMarcin Niestroj static int goodix_check_cfg_16(struct goodix_ts_data *ts, 9225309004SMarcin Niestroj const struct firmware *cfg); 9325309004SMarcin Niestroj 9425309004SMarcin Niestroj static const struct goodix_chip_data gt1x_chip_data = { 9525309004SMarcin Niestroj .config_addr = GOODIX_GT1X_REG_CONFIG_DATA, 9625309004SMarcin Niestroj .config_len = GOODIX_CONFIG_MAX_LENGTH, 9725309004SMarcin Niestroj .check_config = goodix_check_cfg_16, 9825309004SMarcin Niestroj }; 9925309004SMarcin Niestroj 10025309004SMarcin Niestroj static const struct goodix_chip_data gt911_chip_data = { 10125309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 10225309004SMarcin Niestroj .config_len = GOODIX_CONFIG_911_LENGTH, 10325309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 10425309004SMarcin Niestroj }; 10525309004SMarcin Niestroj 10625309004SMarcin Niestroj static const struct goodix_chip_data gt967_chip_data = { 10725309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 10825309004SMarcin Niestroj .config_len = GOODIX_CONFIG_967_LENGTH, 10925309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 11025309004SMarcin Niestroj }; 11125309004SMarcin Niestroj 11225309004SMarcin Niestroj static const struct goodix_chip_data gt9x_chip_data = { 11325309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 11425309004SMarcin Niestroj .config_len = GOODIX_CONFIG_MAX_LENGTH, 11525309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 11625309004SMarcin Niestroj }; 11725309004SMarcin Niestroj 118ca96ea86SBastien Nocera static const unsigned long goodix_irq_flags[] = { 119ca96ea86SBastien Nocera IRQ_TYPE_EDGE_RISING, 120ca96ea86SBastien Nocera IRQ_TYPE_EDGE_FALLING, 121ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_LOW, 122ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_HIGH, 123ca96ea86SBastien Nocera }; 124ca96ea86SBastien Nocera 1258b5a359cSBastien Nocera /* 1268b5a359cSBastien Nocera * Those tablets have their coordinates origin at the bottom right 1278b5a359cSBastien Nocera * of the tablet, as if rotated 180 degrees 1288b5a359cSBastien Nocera */ 1298b5a359cSBastien Nocera static const struct dmi_system_id rotated_screen[] = { 1308b5a359cSBastien Nocera #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1318b5a359cSBastien Nocera { 132df5b5e55SHans de Goede .ident = "Teclast X89", 133df5b5e55SHans de Goede .matches = { 134df5b5e55SHans de Goede /* tPAD is too generic, also match on bios date */ 135df5b5e55SHans de Goede DMI_MATCH(DMI_BOARD_VENDOR, "TECLAST"), 136df5b5e55SHans de Goede DMI_MATCH(DMI_BOARD_NAME, "tPAD"), 137df5b5e55SHans de Goede DMI_MATCH(DMI_BIOS_DATE, "12/19/2014"), 138df5b5e55SHans de Goede }, 139df5b5e55SHans de Goede }, 140df5b5e55SHans de Goede { 1418b5a359cSBastien Nocera .ident = "WinBook TW100", 1428b5a359cSBastien Nocera .matches = { 1438b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 1448b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW100") 1458b5a359cSBastien Nocera } 1468b5a359cSBastien Nocera }, 1478b5a359cSBastien Nocera { 1488b5a359cSBastien Nocera .ident = "WinBook TW700", 1498b5a359cSBastien Nocera .matches = { 1508b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 1518b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW700") 1528b5a359cSBastien Nocera }, 1538b5a359cSBastien Nocera }, 1548b5a359cSBastien Nocera #endif 1558b5a359cSBastien Nocera {} 1568b5a359cSBastien Nocera }; 1578b5a359cSBastien Nocera 158bd3b8480SYauhen Kharuzhy static const struct dmi_system_id nine_bytes_report[] = { 159bd3b8480SYauhen Kharuzhy #if defined(CONFIG_DMI) && defined(CONFIG_X86) 160bd3b8480SYauhen Kharuzhy { 161bd3b8480SYauhen Kharuzhy .ident = "Lenovo YogaBook", 162bd3b8480SYauhen Kharuzhy /* YB1-X91L/F and YB1-X90L/F */ 163bd3b8480SYauhen Kharuzhy .matches = { 164bd3b8480SYauhen Kharuzhy DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X9") 165bd3b8480SYauhen Kharuzhy } 166bd3b8480SYauhen Kharuzhy }, 167bd3b8480SYauhen Kharuzhy #endif 168bd3b8480SYauhen Kharuzhy {} 169bd3b8480SYauhen Kharuzhy }; 170bd3b8480SYauhen Kharuzhy 171ca96ea86SBastien Nocera /** 172ca96ea86SBastien Nocera * goodix_i2c_read - read data from a register of the i2c slave device. 173ca96ea86SBastien Nocera * 174ca96ea86SBastien Nocera * @client: i2c device. 175ca96ea86SBastien Nocera * @reg: the register to read from. 176ca96ea86SBastien Nocera * @buf: raw write data buffer. 177ca96ea86SBastien Nocera * @len: length of the buffer to write 178ca96ea86SBastien Nocera */ 179ca96ea86SBastien Nocera static int goodix_i2c_read(struct i2c_client *client, 180ca96ea86SBastien Nocera u16 reg, u8 *buf, int len) 181ca96ea86SBastien Nocera { 182ca96ea86SBastien Nocera struct i2c_msg msgs[2]; 183fafef982SMarcin Niestroj __be16 wbuf = cpu_to_be16(reg); 184ca96ea86SBastien Nocera int ret; 185ca96ea86SBastien Nocera 186ca96ea86SBastien Nocera msgs[0].flags = 0; 187ca96ea86SBastien Nocera msgs[0].addr = client->addr; 188ca96ea86SBastien Nocera msgs[0].len = 2; 189ca96ea86SBastien Nocera msgs[0].buf = (u8 *)&wbuf; 190ca96ea86SBastien Nocera 191ca96ea86SBastien Nocera msgs[1].flags = I2C_M_RD; 192ca96ea86SBastien Nocera msgs[1].addr = client->addr; 193ca96ea86SBastien Nocera msgs[1].len = len; 194ca96ea86SBastien Nocera msgs[1].buf = buf; 195ca96ea86SBastien Nocera 196ca96ea86SBastien Nocera ret = i2c_transfer(client->adapter, msgs, 2); 197ca96ea86SBastien Nocera return ret < 0 ? ret : (ret != ARRAY_SIZE(msgs) ? -EIO : 0); 198ca96ea86SBastien Nocera } 199ca96ea86SBastien Nocera 20068caf858SIrina Tirdea /** 20168caf858SIrina Tirdea * goodix_i2c_write - write data to a register of the i2c slave device. 20268caf858SIrina Tirdea * 20368caf858SIrina Tirdea * @client: i2c device. 20468caf858SIrina Tirdea * @reg: the register to write to. 20568caf858SIrina Tirdea * @buf: raw data buffer to write. 20668caf858SIrina Tirdea * @len: length of the buffer to write 20768caf858SIrina Tirdea */ 20868caf858SIrina Tirdea static int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf, 20968caf858SIrina Tirdea unsigned len) 21068caf858SIrina Tirdea { 21168caf858SIrina Tirdea u8 *addr_buf; 21268caf858SIrina Tirdea struct i2c_msg msg; 21368caf858SIrina Tirdea int ret; 21468caf858SIrina Tirdea 21568caf858SIrina Tirdea addr_buf = kmalloc(len + 2, GFP_KERNEL); 21668caf858SIrina Tirdea if (!addr_buf) 21768caf858SIrina Tirdea return -ENOMEM; 21868caf858SIrina Tirdea 21968caf858SIrina Tirdea addr_buf[0] = reg >> 8; 22068caf858SIrina Tirdea addr_buf[1] = reg & 0xFF; 22168caf858SIrina Tirdea memcpy(&addr_buf[2], buf, len); 22268caf858SIrina Tirdea 22368caf858SIrina Tirdea msg.flags = 0; 22468caf858SIrina Tirdea msg.addr = client->addr; 22568caf858SIrina Tirdea msg.buf = addr_buf; 22668caf858SIrina Tirdea msg.len = len + 2; 22768caf858SIrina Tirdea 22868caf858SIrina Tirdea ret = i2c_transfer(client->adapter, &msg, 1); 22968caf858SIrina Tirdea kfree(addr_buf); 23068caf858SIrina Tirdea return ret < 0 ? ret : (ret != 1 ? -EIO : 0); 23168caf858SIrina Tirdea } 23268caf858SIrina Tirdea 2335ab09d6aSIrina Tirdea static int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value) 2345ab09d6aSIrina Tirdea { 2355ab09d6aSIrina Tirdea return goodix_i2c_write(client, reg, &value, sizeof(value)); 2365ab09d6aSIrina Tirdea } 2375ab09d6aSIrina Tirdea 23825309004SMarcin Niestroj static const struct goodix_chip_data *goodix_get_chip_data(u16 id) 239a779fbc6SIrina Tirdea { 240a779fbc6SIrina Tirdea switch (id) { 24125309004SMarcin Niestroj case 1151: 242a5f50c50SJagan Teki case 5663: 24384ef1b33SGuido Günther case 5688: 24425309004SMarcin Niestroj return >1x_chip_data; 24525309004SMarcin Niestroj 246a779fbc6SIrina Tirdea case 911: 247a779fbc6SIrina Tirdea case 9271: 248a779fbc6SIrina Tirdea case 9110: 249a779fbc6SIrina Tirdea case 927: 250a779fbc6SIrina Tirdea case 928: 25125309004SMarcin Niestroj return >911_chip_data; 252a779fbc6SIrina Tirdea 253a779fbc6SIrina Tirdea case 912: 254a779fbc6SIrina Tirdea case 967: 25525309004SMarcin Niestroj return >967_chip_data; 256a779fbc6SIrina Tirdea 257a779fbc6SIrina Tirdea default: 25825309004SMarcin Niestroj return >9x_chip_data; 259a779fbc6SIrina Tirdea } 260a779fbc6SIrina Tirdea } 261a779fbc6SIrina Tirdea 262ca96ea86SBastien Nocera static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data) 263ca96ea86SBastien Nocera { 2649b5db7aaSPaul Cercueil unsigned long max_timeout; 265ca96ea86SBastien Nocera int touch_num; 266ca96ea86SBastien Nocera int error; 267ca96ea86SBastien Nocera 2689b5db7aaSPaul Cercueil /* 2699b5db7aaSPaul Cercueil * The 'buffer status' bit, which indicates that the data is valid, is 2709b5db7aaSPaul Cercueil * not set as soon as the interrupt is raised, but slightly after. 2719b5db7aaSPaul Cercueil * This takes around 10 ms to happen, so we poll for 20 ms. 2729b5db7aaSPaul Cercueil */ 2739b5db7aaSPaul Cercueil max_timeout = jiffies + msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT); 2749b5db7aaSPaul Cercueil do { 2759b5db7aaSPaul Cercueil error = goodix_i2c_read(ts->client, GOODIX_READ_COOR_ADDR, 276bd3b8480SYauhen Kharuzhy data, ts->contact_size + 1); 277ca96ea86SBastien Nocera if (error) { 2789b5db7aaSPaul Cercueil dev_err(&ts->client->dev, "I2C transfer error: %d\n", 2799b5db7aaSPaul Cercueil error); 280ca96ea86SBastien Nocera return error; 281ca96ea86SBastien Nocera } 282ca96ea86SBastien Nocera 2839b5db7aaSPaul Cercueil if (data[0] & GOODIX_BUFFER_STATUS_READY) { 284ca96ea86SBastien Nocera touch_num = data[0] & 0x0f; 285a7ac7c95SAleksei Mamlin if (touch_num > ts->max_touch_num) 286ca96ea86SBastien Nocera return -EPROTO; 287ca96ea86SBastien Nocera 288ca96ea86SBastien Nocera if (touch_num > 1) { 289bd3b8480SYauhen Kharuzhy data += 1 + ts->contact_size; 290ca96ea86SBastien Nocera error = goodix_i2c_read(ts->client, 291ca96ea86SBastien Nocera GOODIX_READ_COOR_ADDR + 292bd3b8480SYauhen Kharuzhy 1 + ts->contact_size, 293ca96ea86SBastien Nocera data, 294bd3b8480SYauhen Kharuzhy ts->contact_size * 2959b5db7aaSPaul Cercueil (touch_num - 1)); 296ca96ea86SBastien Nocera if (error) 297ca96ea86SBastien Nocera return error; 298ca96ea86SBastien Nocera } 299ca96ea86SBastien Nocera 300ca96ea86SBastien Nocera return touch_num; 301ca96ea86SBastien Nocera } 302ca96ea86SBastien Nocera 3039b5db7aaSPaul Cercueil usleep_range(1000, 2000); /* Poll every 1 - 2 ms */ 3049b5db7aaSPaul Cercueil } while (time_before(jiffies, max_timeout)); 3059b5db7aaSPaul Cercueil 3069b5db7aaSPaul Cercueil /* 3079b5db7aaSPaul Cercueil * The Goodix panel will send spurious interrupts after a 3089b5db7aaSPaul Cercueil * 'finger up' event, which will always cause a timeout. 3099b5db7aaSPaul Cercueil */ 3109b5db7aaSPaul Cercueil return 0; 3119b5db7aaSPaul Cercueil } 3129b5db7aaSPaul Cercueil 313bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_8b(struct goodix_ts_data *ts, u8 *coor_data) 314ca96ea86SBastien Nocera { 315ca96ea86SBastien Nocera int id = coor_data[0] & 0x0F; 316ca96ea86SBastien Nocera int input_x = get_unaligned_le16(&coor_data[1]); 317ca96ea86SBastien Nocera int input_y = get_unaligned_le16(&coor_data[3]); 318ca96ea86SBastien Nocera int input_w = get_unaligned_le16(&coor_data[5]); 319ca96ea86SBastien Nocera 320ca96ea86SBastien Nocera input_mt_slot(ts->input_dev, id); 321ca96ea86SBastien Nocera input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 322fafef982SMarcin Niestroj touchscreen_report_pos(ts->input_dev, &ts->prop, 323fafef982SMarcin Niestroj input_x, input_y, true); 324ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 325ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 326ca96ea86SBastien Nocera } 327ca96ea86SBastien Nocera 328bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_9b(struct goodix_ts_data *ts, u8 *coor_data) 329bd3b8480SYauhen Kharuzhy { 330bd3b8480SYauhen Kharuzhy int id = coor_data[1] & 0x0F; 331bd3b8480SYauhen Kharuzhy int input_x = get_unaligned_le16(&coor_data[3]); 332bd3b8480SYauhen Kharuzhy int input_y = get_unaligned_le16(&coor_data[5]); 333bd3b8480SYauhen Kharuzhy int input_w = get_unaligned_le16(&coor_data[7]); 334bd3b8480SYauhen Kharuzhy 335bd3b8480SYauhen Kharuzhy input_mt_slot(ts->input_dev, id); 336bd3b8480SYauhen Kharuzhy input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 337bd3b8480SYauhen Kharuzhy touchscreen_report_pos(ts->input_dev, &ts->prop, 338bd3b8480SYauhen Kharuzhy input_x, input_y, true); 339bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 340bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 341bd3b8480SYauhen Kharuzhy } 342bd3b8480SYauhen Kharuzhy 343ca96ea86SBastien Nocera /** 344ca96ea86SBastien Nocera * goodix_process_events - Process incoming events 345ca96ea86SBastien Nocera * 346ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 347ca96ea86SBastien Nocera * 348ca96ea86SBastien Nocera * Called when the IRQ is triggered. Read the current device state, and push 349ca96ea86SBastien Nocera * the input events to the user space. 350ca96ea86SBastien Nocera */ 351ca96ea86SBastien Nocera static void goodix_process_events(struct goodix_ts_data *ts) 352ca96ea86SBastien Nocera { 353bd3b8480SYauhen Kharuzhy u8 point_data[1 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS]; 354ca96ea86SBastien Nocera int touch_num; 355ca96ea86SBastien Nocera int i; 356ca96ea86SBastien Nocera 357ca96ea86SBastien Nocera touch_num = goodix_ts_read_input_report(ts, point_data); 358ca96ea86SBastien Nocera if (touch_num < 0) 359ca96ea86SBastien Nocera return; 360ca96ea86SBastien Nocera 3614a54feeaSSergei A. Trusov /* 3624a54feeaSSergei A. Trusov * Bit 4 of the first byte reports the status of the capacitive 3634a54feeaSSergei A. Trusov * Windows/Home button. 3644a54feeaSSergei A. Trusov */ 3654a54feeaSSergei A. Trusov input_report_key(ts->input_dev, KEY_LEFTMETA, point_data[0] & BIT(4)); 3664a54feeaSSergei A. Trusov 367ca96ea86SBastien Nocera for (i = 0; i < touch_num; i++) 368bd3b8480SYauhen Kharuzhy if (ts->contact_size == 9) 369bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_9b(ts, 370bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 371bd3b8480SYauhen Kharuzhy else 372bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_8b(ts, 373bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 374ca96ea86SBastien Nocera 375ca96ea86SBastien Nocera input_mt_sync_frame(ts->input_dev); 376ca96ea86SBastien Nocera input_sync(ts->input_dev); 377ca96ea86SBastien Nocera } 378ca96ea86SBastien Nocera 379ca96ea86SBastien Nocera /** 380ca96ea86SBastien Nocera * goodix_ts_irq_handler - The IRQ handler 381ca96ea86SBastien Nocera * 382ca96ea86SBastien Nocera * @irq: interrupt number. 383ca96ea86SBastien Nocera * @dev_id: private data pointer. 384ca96ea86SBastien Nocera */ 385ca96ea86SBastien Nocera static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id) 386ca96ea86SBastien Nocera { 387ca96ea86SBastien Nocera struct goodix_ts_data *ts = dev_id; 388ca96ea86SBastien Nocera 389ca96ea86SBastien Nocera goodix_process_events(ts); 390ca96ea86SBastien Nocera 3915d655b35SIrina Tirdea if (goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0) < 0) 392ca96ea86SBastien Nocera dev_err(&ts->client->dev, "I2C write end_cmd error\n"); 393ca96ea86SBastien Nocera 394ca96ea86SBastien Nocera return IRQ_HANDLED; 395ca96ea86SBastien Nocera } 396ca96ea86SBastien Nocera 3975ab09d6aSIrina Tirdea static void goodix_free_irq(struct goodix_ts_data *ts) 3985ab09d6aSIrina Tirdea { 3995ab09d6aSIrina Tirdea devm_free_irq(&ts->client->dev, ts->client->irq, ts); 4005ab09d6aSIrina Tirdea } 4015ab09d6aSIrina Tirdea 4025ab09d6aSIrina Tirdea static int goodix_request_irq(struct goodix_ts_data *ts) 4035ab09d6aSIrina Tirdea { 4045ab09d6aSIrina Tirdea return devm_request_threaded_irq(&ts->client->dev, ts->client->irq, 4055ab09d6aSIrina Tirdea NULL, goodix_ts_irq_handler, 4065ab09d6aSIrina Tirdea ts->irq_flags, ts->client->name, ts); 4075ab09d6aSIrina Tirdea } 4085ab09d6aSIrina Tirdea 40925309004SMarcin Niestroj static int goodix_check_cfg_8(struct goodix_ts_data *ts, 41068caf858SIrina Tirdea const struct firmware *cfg) 41168caf858SIrina Tirdea { 41225309004SMarcin Niestroj int i, raw_cfg_len = cfg->size - 2; 41368caf858SIrina Tirdea u8 check_sum = 0; 41468caf858SIrina Tirdea 41568caf858SIrina Tirdea for (i = 0; i < raw_cfg_len; i++) 41668caf858SIrina Tirdea check_sum += cfg->data[i]; 41768caf858SIrina Tirdea check_sum = (~check_sum) + 1; 41868caf858SIrina Tirdea if (check_sum != cfg->data[raw_cfg_len]) { 41968caf858SIrina Tirdea dev_err(&ts->client->dev, 42068caf858SIrina Tirdea "The checksum of the config fw is not correct"); 42168caf858SIrina Tirdea return -EINVAL; 42268caf858SIrina Tirdea } 42368caf858SIrina Tirdea 42468caf858SIrina Tirdea if (cfg->data[raw_cfg_len + 1] != 1) { 42568caf858SIrina Tirdea dev_err(&ts->client->dev, 42668caf858SIrina Tirdea "Config fw must have Config_Fresh register set"); 42768caf858SIrina Tirdea return -EINVAL; 42868caf858SIrina Tirdea } 42968caf858SIrina Tirdea 43068caf858SIrina Tirdea return 0; 43168caf858SIrina Tirdea } 43268caf858SIrina Tirdea 43325309004SMarcin Niestroj static int goodix_check_cfg_16(struct goodix_ts_data *ts, 43425309004SMarcin Niestroj const struct firmware *cfg) 43525309004SMarcin Niestroj { 43625309004SMarcin Niestroj int i, raw_cfg_len = cfg->size - 3; 43725309004SMarcin Niestroj u16 check_sum = 0; 43825309004SMarcin Niestroj 43925309004SMarcin Niestroj for (i = 0; i < raw_cfg_len; i += 2) 44025309004SMarcin Niestroj check_sum += get_unaligned_be16(&cfg->data[i]); 44125309004SMarcin Niestroj check_sum = (~check_sum) + 1; 44225309004SMarcin Niestroj if (check_sum != get_unaligned_be16(&cfg->data[raw_cfg_len])) { 44325309004SMarcin Niestroj dev_err(&ts->client->dev, 44425309004SMarcin Niestroj "The checksum of the config fw is not correct"); 44525309004SMarcin Niestroj return -EINVAL; 44625309004SMarcin Niestroj } 44725309004SMarcin Niestroj 44825309004SMarcin Niestroj if (cfg->data[raw_cfg_len + 2] != 1) { 44925309004SMarcin Niestroj dev_err(&ts->client->dev, 45025309004SMarcin Niestroj "Config fw must have Config_Fresh register set"); 45125309004SMarcin Niestroj return -EINVAL; 45225309004SMarcin Niestroj } 45325309004SMarcin Niestroj 45425309004SMarcin Niestroj return 0; 45525309004SMarcin Niestroj } 45625309004SMarcin Niestroj 45725309004SMarcin Niestroj /** 45825309004SMarcin Niestroj * goodix_check_cfg - Checks if config fw is valid 45925309004SMarcin Niestroj * 46025309004SMarcin Niestroj * @ts: goodix_ts_data pointer 46125309004SMarcin Niestroj * @cfg: firmware config data 46225309004SMarcin Niestroj */ 46325309004SMarcin Niestroj static int goodix_check_cfg(struct goodix_ts_data *ts, 46425309004SMarcin Niestroj const struct firmware *cfg) 46525309004SMarcin Niestroj { 46625309004SMarcin Niestroj if (cfg->size > GOODIX_CONFIG_MAX_LENGTH) { 46725309004SMarcin Niestroj dev_err(&ts->client->dev, 46825309004SMarcin Niestroj "The length of the config fw is not correct"); 46925309004SMarcin Niestroj return -EINVAL; 47025309004SMarcin Niestroj } 47125309004SMarcin Niestroj 47225309004SMarcin Niestroj return ts->chip->check_config(ts, cfg); 47325309004SMarcin Niestroj } 47425309004SMarcin Niestroj 47568caf858SIrina Tirdea /** 47668caf858SIrina Tirdea * goodix_send_cfg - Write fw config to device 47768caf858SIrina Tirdea * 47868caf858SIrina Tirdea * @ts: goodix_ts_data pointer 47968caf858SIrina Tirdea * @cfg: config firmware to write to device 48068caf858SIrina Tirdea */ 48168caf858SIrina Tirdea static int goodix_send_cfg(struct goodix_ts_data *ts, 48268caf858SIrina Tirdea const struct firmware *cfg) 48368caf858SIrina Tirdea { 48468caf858SIrina Tirdea int error; 48568caf858SIrina Tirdea 48668caf858SIrina Tirdea error = goodix_check_cfg(ts, cfg); 48768caf858SIrina Tirdea if (error) 48868caf858SIrina Tirdea return error; 48968caf858SIrina Tirdea 49025309004SMarcin Niestroj error = goodix_i2c_write(ts->client, ts->chip->config_addr, cfg->data, 49168caf858SIrina Tirdea cfg->size); 49268caf858SIrina Tirdea if (error) { 49368caf858SIrina Tirdea dev_err(&ts->client->dev, "Failed to write config data: %d", 49468caf858SIrina Tirdea error); 49568caf858SIrina Tirdea return error; 49668caf858SIrina Tirdea } 49768caf858SIrina Tirdea dev_dbg(&ts->client->dev, "Config sent successfully."); 49868caf858SIrina Tirdea 49968caf858SIrina Tirdea /* Let the firmware reconfigure itself, so sleep for 10ms */ 50068caf858SIrina Tirdea usleep_range(10000, 11000); 50168caf858SIrina Tirdea 50268caf858SIrina Tirdea return 0; 50368caf858SIrina Tirdea } 50468caf858SIrina Tirdea 505ec6e1b40SIrina Tirdea static int goodix_int_sync(struct goodix_ts_data *ts) 506ec6e1b40SIrina Tirdea { 507ec6e1b40SIrina Tirdea int error; 508ec6e1b40SIrina Tirdea 509ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, 0); 510ec6e1b40SIrina Tirdea if (error) 511ec6e1b40SIrina Tirdea return error; 512ec6e1b40SIrina Tirdea 513ec6e1b40SIrina Tirdea msleep(50); /* T5: 50ms */ 514ec6e1b40SIrina Tirdea 515ec6e1b40SIrina Tirdea error = gpiod_direction_input(ts->gpiod_int); 516ec6e1b40SIrina Tirdea if (error) 517ec6e1b40SIrina Tirdea return error; 518ec6e1b40SIrina Tirdea 519ec6e1b40SIrina Tirdea return 0; 520ec6e1b40SIrina Tirdea } 521ec6e1b40SIrina Tirdea 522ec6e1b40SIrina Tirdea /** 523ec6e1b40SIrina Tirdea * goodix_reset - Reset device during power on 524ec6e1b40SIrina Tirdea * 525ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 526ec6e1b40SIrina Tirdea */ 527ec6e1b40SIrina Tirdea static int goodix_reset(struct goodix_ts_data *ts) 528ec6e1b40SIrina Tirdea { 529ec6e1b40SIrina Tirdea int error; 530ec6e1b40SIrina Tirdea 531ec6e1b40SIrina Tirdea /* begin select I2C slave addr */ 532ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 0); 533ec6e1b40SIrina Tirdea if (error) 534ec6e1b40SIrina Tirdea return error; 535ec6e1b40SIrina Tirdea 536ec6e1b40SIrina Tirdea msleep(20); /* T2: > 10ms */ 537ec6e1b40SIrina Tirdea 538ec6e1b40SIrina Tirdea /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */ 539ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, ts->client->addr == 0x14); 540ec6e1b40SIrina Tirdea if (error) 541ec6e1b40SIrina Tirdea return error; 542ec6e1b40SIrina Tirdea 543ec6e1b40SIrina Tirdea usleep_range(100, 2000); /* T3: > 100us */ 544ec6e1b40SIrina Tirdea 545ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 1); 546ec6e1b40SIrina Tirdea if (error) 547ec6e1b40SIrina Tirdea return error; 548ec6e1b40SIrina Tirdea 549ec6e1b40SIrina Tirdea usleep_range(6000, 10000); /* T4: > 5ms */ 550ec6e1b40SIrina Tirdea 551ec6e1b40SIrina Tirdea /* end select I2C slave addr */ 552ec6e1b40SIrina Tirdea error = gpiod_direction_input(ts->gpiod_rst); 553ec6e1b40SIrina Tirdea if (error) 554ec6e1b40SIrina Tirdea return error; 555ec6e1b40SIrina Tirdea 556ec6e1b40SIrina Tirdea error = goodix_int_sync(ts); 557ec6e1b40SIrina Tirdea if (error) 558ec6e1b40SIrina Tirdea return error; 559ec6e1b40SIrina Tirdea 560ec6e1b40SIrina Tirdea return 0; 561ec6e1b40SIrina Tirdea } 562ec6e1b40SIrina Tirdea 563ec6e1b40SIrina Tirdea /** 564ec6e1b40SIrina Tirdea * goodix_get_gpio_config - Get GPIO config from ACPI/DT 565ec6e1b40SIrina Tirdea * 566ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 567ec6e1b40SIrina Tirdea */ 568ec6e1b40SIrina Tirdea static int goodix_get_gpio_config(struct goodix_ts_data *ts) 569ec6e1b40SIrina Tirdea { 570ec6e1b40SIrina Tirdea int error; 571ec6e1b40SIrina Tirdea struct device *dev; 572ec6e1b40SIrina Tirdea struct gpio_desc *gpiod; 573ec6e1b40SIrina Tirdea 574ec6e1b40SIrina Tirdea if (!ts->client) 575ec6e1b40SIrina Tirdea return -EINVAL; 576ec6e1b40SIrina Tirdea dev = &ts->client->dev; 577ec6e1b40SIrina Tirdea 578ae97fb58SJagan Teki ts->avdd28 = devm_regulator_get(dev, "AVDD28"); 579ae97fb58SJagan Teki if (IS_ERR(ts->avdd28)) { 580ae97fb58SJagan Teki error = PTR_ERR(ts->avdd28); 581ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 582ae97fb58SJagan Teki dev_err(dev, 583ae97fb58SJagan Teki "Failed to get AVDD28 regulator: %d\n", error); 584ae97fb58SJagan Teki return error; 585ae97fb58SJagan Teki } 586ae97fb58SJagan Teki 587ae97fb58SJagan Teki ts->vddio = devm_regulator_get(dev, "VDDIO"); 588ae97fb58SJagan Teki if (IS_ERR(ts->vddio)) { 589ae97fb58SJagan Teki error = PTR_ERR(ts->vddio); 590ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 591ae97fb58SJagan Teki dev_err(dev, 592ae97fb58SJagan Teki "Failed to get VDDIO regulator: %d\n", error); 593ae97fb58SJagan Teki return error; 594ae97fb58SJagan Teki } 595ae97fb58SJagan Teki 596ec6e1b40SIrina Tirdea /* Get the interrupt GPIO pin number */ 597ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN); 598ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 599ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 600ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 601ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 602ec6e1b40SIrina Tirdea GOODIX_GPIO_INT_NAME, error); 603ec6e1b40SIrina Tirdea return error; 604ec6e1b40SIrina Tirdea } 605ec6e1b40SIrina Tirdea 606ec6e1b40SIrina Tirdea ts->gpiod_int = gpiod; 607ec6e1b40SIrina Tirdea 608ec6e1b40SIrina Tirdea /* Get the reset line GPIO pin number */ 609ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, GPIOD_IN); 610ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 611ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 612ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 613ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 614ec6e1b40SIrina Tirdea GOODIX_GPIO_RST_NAME, error); 615ec6e1b40SIrina Tirdea return error; 616ec6e1b40SIrina Tirdea } 617ec6e1b40SIrina Tirdea 618ec6e1b40SIrina Tirdea ts->gpiod_rst = gpiod; 619ec6e1b40SIrina Tirdea 620ec6e1b40SIrina Tirdea return 0; 621ec6e1b40SIrina Tirdea } 622ec6e1b40SIrina Tirdea 623ca96ea86SBastien Nocera /** 624ca96ea86SBastien Nocera * goodix_read_config - Read the embedded configuration of the panel 625ca96ea86SBastien Nocera * 626ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 627ca96ea86SBastien Nocera * 628ca96ea86SBastien Nocera * Must be called during probe 629ca96ea86SBastien Nocera */ 630ca96ea86SBastien Nocera static void goodix_read_config(struct goodix_ts_data *ts) 631ca96ea86SBastien Nocera { 632ca96ea86SBastien Nocera u8 config[GOODIX_CONFIG_MAX_LENGTH]; 633fafef982SMarcin Niestroj int x_max, y_max; 634ca96ea86SBastien Nocera int error; 635ca96ea86SBastien Nocera 63625309004SMarcin Niestroj error = goodix_i2c_read(ts->client, ts->chip->config_addr, 63725309004SMarcin Niestroj config, ts->chip->config_len); 638ca96ea86SBastien Nocera if (error) { 639fafef982SMarcin Niestroj dev_warn(&ts->client->dev, "Error reading config: %d\n", 640ca96ea86SBastien Nocera error); 641ca96ea86SBastien Nocera ts->int_trigger_type = GOODIX_INT_TRIGGER; 642a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 643ca96ea86SBastien Nocera return; 644ca96ea86SBastien Nocera } 645ca96ea86SBastien Nocera 646a7ac7c95SAleksei Mamlin ts->int_trigger_type = config[TRIGGER_LOC] & 0x03; 647a7ac7c95SAleksei Mamlin ts->max_touch_num = config[MAX_CONTACTS_LOC] & 0x0f; 6488b5a359cSBastien Nocera 649fafef982SMarcin Niestroj x_max = get_unaligned_le16(&config[RESOLUTION_LOC]); 650fafef982SMarcin Niestroj y_max = get_unaligned_le16(&config[RESOLUTION_LOC + 2]); 651fafef982SMarcin Niestroj if (x_max && y_max) { 652fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_X, x_max - 1); 653fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_Y, y_max - 1); 654ca96ea86SBastien Nocera } 65557c80e8eSKarsten Merker } 656ca96ea86SBastien Nocera 657ca96ea86SBastien Nocera /** 658ca96ea86SBastien Nocera * goodix_read_version - Read goodix touchscreen version 659ca96ea86SBastien Nocera * 66068caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 661ca96ea86SBastien Nocera */ 66268caf858SIrina Tirdea static int goodix_read_version(struct goodix_ts_data *ts) 663ca96ea86SBastien Nocera { 664ca96ea86SBastien Nocera int error; 665ca96ea86SBastien Nocera u8 buf[6]; 666e70b0307SIrina Tirdea char id_str[5]; 667ca96ea86SBastien Nocera 66868caf858SIrina Tirdea error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf)); 669ca96ea86SBastien Nocera if (error) { 67068caf858SIrina Tirdea dev_err(&ts->client->dev, "read version failed: %d\n", error); 671ca96ea86SBastien Nocera return error; 672ca96ea86SBastien Nocera } 673ca96ea86SBastien Nocera 674e70b0307SIrina Tirdea memcpy(id_str, buf, 4); 675e70b0307SIrina Tirdea id_str[4] = 0; 67668caf858SIrina Tirdea if (kstrtou16(id_str, 10, &ts->id)) 67768caf858SIrina Tirdea ts->id = 0x1001; 678e70b0307SIrina Tirdea 67968caf858SIrina Tirdea ts->version = get_unaligned_le16(&buf[4]); 680ca96ea86SBastien Nocera 68168caf858SIrina Tirdea dev_info(&ts->client->dev, "ID %d, version: %04x\n", ts->id, 68268caf858SIrina Tirdea ts->version); 683ca96ea86SBastien Nocera 684ca96ea86SBastien Nocera return 0; 685ca96ea86SBastien Nocera } 686ca96ea86SBastien Nocera 687ca96ea86SBastien Nocera /** 688ca96ea86SBastien Nocera * goodix_i2c_test - I2C test function to check if the device answers. 689ca96ea86SBastien Nocera * 690ca96ea86SBastien Nocera * @client: the i2c client 691ca96ea86SBastien Nocera */ 692ca96ea86SBastien Nocera static int goodix_i2c_test(struct i2c_client *client) 693ca96ea86SBastien Nocera { 694ca96ea86SBastien Nocera int retry = 0; 695ca96ea86SBastien Nocera int error; 696ca96ea86SBastien Nocera u8 test; 697ca96ea86SBastien Nocera 698ca96ea86SBastien Nocera while (retry++ < 2) { 69925309004SMarcin Niestroj error = goodix_i2c_read(client, GOODIX_REG_ID, 700ca96ea86SBastien Nocera &test, 1); 701ca96ea86SBastien Nocera if (!error) 702ca96ea86SBastien Nocera return 0; 703ca96ea86SBastien Nocera 704ca96ea86SBastien Nocera dev_err(&client->dev, "i2c test failed attempt %d: %d\n", 705ca96ea86SBastien Nocera retry, error); 706ca96ea86SBastien Nocera msleep(20); 707ca96ea86SBastien Nocera } 708ca96ea86SBastien Nocera 709ca96ea86SBastien Nocera return error; 710ca96ea86SBastien Nocera } 711ca96ea86SBastien Nocera 712ca96ea86SBastien Nocera /** 71368caf858SIrina Tirdea * goodix_configure_dev - Finish device initialization 71468caf858SIrina Tirdea * 71568caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 71668caf858SIrina Tirdea * 71768caf858SIrina Tirdea * Must be called from probe to finish initialization of the device. 71868caf858SIrina Tirdea * Contains the common initialization code for both devices that 71968caf858SIrina Tirdea * declare gpio pins and devices that do not. It is either called 72068caf858SIrina Tirdea * directly from probe or from request_firmware_wait callback. 72168caf858SIrina Tirdea */ 72268caf858SIrina Tirdea static int goodix_configure_dev(struct goodix_ts_data *ts) 72368caf858SIrina Tirdea { 72468caf858SIrina Tirdea int error; 72568caf858SIrina Tirdea 726fafef982SMarcin Niestroj ts->int_trigger_type = GOODIX_INT_TRIGGER; 727fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 728ad48cf5eSKarsten Merker 729fafef982SMarcin Niestroj ts->input_dev = devm_input_allocate_device(&ts->client->dev); 730fafef982SMarcin Niestroj if (!ts->input_dev) { 731fafef982SMarcin Niestroj dev_err(&ts->client->dev, "Failed to allocate input device."); 732fafef982SMarcin Niestroj return -ENOMEM; 733fafef982SMarcin Niestroj } 734fafef982SMarcin Niestroj 735fafef982SMarcin Niestroj ts->input_dev->name = "Goodix Capacitive TouchScreen"; 736fafef982SMarcin Niestroj ts->input_dev->phys = "input/ts"; 737fafef982SMarcin Niestroj ts->input_dev->id.bustype = BUS_I2C; 738fafef982SMarcin Niestroj ts->input_dev->id.vendor = 0x0416; 739fafef982SMarcin Niestroj ts->input_dev->id.product = ts->id; 740fafef982SMarcin Niestroj ts->input_dev->id.version = ts->version; 741fafef982SMarcin Niestroj 742fafef982SMarcin Niestroj /* Capacitive Windows/Home button on some devices */ 743fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_KEY, KEY_LEFTMETA); 744fafef982SMarcin Niestroj 745fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X); 746fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y); 747fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 748fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 749fafef982SMarcin Niestroj 750fafef982SMarcin Niestroj /* Read configuration and apply touchscreen parameters */ 75168caf858SIrina Tirdea goodix_read_config(ts); 75268caf858SIrina Tirdea 753fafef982SMarcin Niestroj /* Try overriding touchscreen parameters via device properties */ 754fafef982SMarcin Niestroj touchscreen_parse_properties(ts->input_dev, true, &ts->prop); 755fafef982SMarcin Niestroj 756fafef982SMarcin Niestroj if (!ts->prop.max_x || !ts->prop.max_y || !ts->max_touch_num) { 757c1c00aa5SGuido Günther dev_err(&ts->client->dev, 758c1c00aa5SGuido Günther "Invalid config (%d, %d, %d), using defaults\n", 759c1c00aa5SGuido Günther ts->prop.max_x, ts->prop.max_y, ts->max_touch_num); 760fafef982SMarcin Niestroj ts->prop.max_x = GOODIX_MAX_WIDTH - 1; 761fafef982SMarcin Niestroj ts->prop.max_y = GOODIX_MAX_HEIGHT - 1; 762fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 763fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 764fafef982SMarcin Niestroj ABS_MT_POSITION_X, ts->prop.max_x); 765fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 766fafef982SMarcin Niestroj ABS_MT_POSITION_Y, ts->prop.max_y); 767fafef982SMarcin Niestroj } 768fafef982SMarcin Niestroj 769fafef982SMarcin Niestroj if (dmi_check_system(rotated_screen)) { 770fafef982SMarcin Niestroj ts->prop.invert_x = true; 771fafef982SMarcin Niestroj ts->prop.invert_y = true; 772fafef982SMarcin Niestroj dev_dbg(&ts->client->dev, 773fafef982SMarcin Niestroj "Applying '180 degrees rotated screen' quirk\n"); 774fafef982SMarcin Niestroj } 775fafef982SMarcin Niestroj 776bd3b8480SYauhen Kharuzhy if (dmi_check_system(nine_bytes_report)) { 777bd3b8480SYauhen Kharuzhy ts->contact_size = 9; 778bd3b8480SYauhen Kharuzhy 779bd3b8480SYauhen Kharuzhy dev_dbg(&ts->client->dev, 780bd3b8480SYauhen Kharuzhy "Non-standard 9-bytes report format quirk\n"); 781bd3b8480SYauhen Kharuzhy } 782bd3b8480SYauhen Kharuzhy 783fafef982SMarcin Niestroj error = input_mt_init_slots(ts->input_dev, ts->max_touch_num, 784fafef982SMarcin Niestroj INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); 785fafef982SMarcin Niestroj if (error) { 786fafef982SMarcin Niestroj dev_err(&ts->client->dev, 787fafef982SMarcin Niestroj "Failed to initialize MT slots: %d", error); 78868caf858SIrina Tirdea return error; 789fafef982SMarcin Niestroj } 790fafef982SMarcin Niestroj 791fafef982SMarcin Niestroj error = input_register_device(ts->input_dev); 792fafef982SMarcin Niestroj if (error) { 793fafef982SMarcin Niestroj dev_err(&ts->client->dev, 794fafef982SMarcin Niestroj "Failed to register input device: %d", error); 795fafef982SMarcin Niestroj return error; 796fafef982SMarcin Niestroj } 79768caf858SIrina Tirdea 7985ab09d6aSIrina Tirdea ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT; 7995ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 80068caf858SIrina Tirdea if (error) { 80168caf858SIrina Tirdea dev_err(&ts->client->dev, "request IRQ failed: %d\n", error); 80268caf858SIrina Tirdea return error; 80368caf858SIrina Tirdea } 80468caf858SIrina Tirdea 80568caf858SIrina Tirdea return 0; 80668caf858SIrina Tirdea } 80768caf858SIrina Tirdea 80868caf858SIrina Tirdea /** 80968caf858SIrina Tirdea * goodix_config_cb - Callback to finish device init 81068caf858SIrina Tirdea * 81168caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 81268caf858SIrina Tirdea * 81368caf858SIrina Tirdea * request_firmware_wait callback that finishes 81468caf858SIrina Tirdea * initialization of the device. 81568caf858SIrina Tirdea */ 81668caf858SIrina Tirdea static void goodix_config_cb(const struct firmware *cfg, void *ctx) 81768caf858SIrina Tirdea { 81868caf858SIrina Tirdea struct goodix_ts_data *ts = ctx; 81968caf858SIrina Tirdea int error; 82068caf858SIrina Tirdea 82168caf858SIrina Tirdea if (cfg) { 82268caf858SIrina Tirdea /* send device configuration to the firmware */ 82368caf858SIrina Tirdea error = goodix_send_cfg(ts, cfg); 82468caf858SIrina Tirdea if (error) 82568caf858SIrina Tirdea goto err_release_cfg; 82668caf858SIrina Tirdea } 82768caf858SIrina Tirdea 82868caf858SIrina Tirdea goodix_configure_dev(ts); 82968caf858SIrina Tirdea 83068caf858SIrina Tirdea err_release_cfg: 83168caf858SIrina Tirdea release_firmware(cfg); 83268caf858SIrina Tirdea complete_all(&ts->firmware_loading_complete); 83368caf858SIrina Tirdea } 83468caf858SIrina Tirdea 835ae97fb58SJagan Teki static void goodix_disable_regulators(void *arg) 836ae97fb58SJagan Teki { 837ae97fb58SJagan Teki struct goodix_ts_data *ts = arg; 838ae97fb58SJagan Teki 839ae97fb58SJagan Teki regulator_disable(ts->vddio); 840ae97fb58SJagan Teki regulator_disable(ts->avdd28); 841ae97fb58SJagan Teki } 842ae97fb58SJagan Teki 843ca96ea86SBastien Nocera static int goodix_ts_probe(struct i2c_client *client, 844ca96ea86SBastien Nocera const struct i2c_device_id *id) 845ca96ea86SBastien Nocera { 846ca96ea86SBastien Nocera struct goodix_ts_data *ts; 847ca96ea86SBastien Nocera int error; 848ca96ea86SBastien Nocera 849ca96ea86SBastien Nocera dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr); 850ca96ea86SBastien Nocera 851ca96ea86SBastien Nocera if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 852ca96ea86SBastien Nocera dev_err(&client->dev, "I2C check functionality failed.\n"); 853ca96ea86SBastien Nocera return -ENXIO; 854ca96ea86SBastien Nocera } 855ca96ea86SBastien Nocera 856ca96ea86SBastien Nocera ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); 857ca96ea86SBastien Nocera if (!ts) 858ca96ea86SBastien Nocera return -ENOMEM; 859ca96ea86SBastien Nocera 860ca96ea86SBastien Nocera ts->client = client; 861ca96ea86SBastien Nocera i2c_set_clientdata(client, ts); 86268caf858SIrina Tirdea init_completion(&ts->firmware_loading_complete); 863bd3b8480SYauhen Kharuzhy ts->contact_size = GOODIX_CONTACT_SIZE; 864ca96ea86SBastien Nocera 865ec6e1b40SIrina Tirdea error = goodix_get_gpio_config(ts); 866ec6e1b40SIrina Tirdea if (error) 867ec6e1b40SIrina Tirdea return error; 868ec6e1b40SIrina Tirdea 869ae97fb58SJagan Teki /* power up the controller */ 870ae97fb58SJagan Teki error = regulator_enable(ts->avdd28); 871ae97fb58SJagan Teki if (error) { 872ae97fb58SJagan Teki dev_err(&client->dev, 873ae97fb58SJagan Teki "Failed to enable AVDD28 regulator: %d\n", 874ae97fb58SJagan Teki error); 875ae97fb58SJagan Teki return error; 876ae97fb58SJagan Teki } 877ae97fb58SJagan Teki 878ae97fb58SJagan Teki error = regulator_enable(ts->vddio); 879ae97fb58SJagan Teki if (error) { 880ae97fb58SJagan Teki dev_err(&client->dev, 881ae97fb58SJagan Teki "Failed to enable VDDIO regulator: %d\n", 882ae97fb58SJagan Teki error); 883ae97fb58SJagan Teki regulator_disable(ts->avdd28); 884ae97fb58SJagan Teki return error; 885ae97fb58SJagan Teki } 886ae97fb58SJagan Teki 887ae97fb58SJagan Teki error = devm_add_action_or_reset(&client->dev, 888ae97fb58SJagan Teki goodix_disable_regulators, ts); 889ae97fb58SJagan Teki if (error) 890ae97fb58SJagan Teki return error; 891ae97fb58SJagan Teki 892ec6e1b40SIrina Tirdea if (ts->gpiod_int && ts->gpiod_rst) { 893ec6e1b40SIrina Tirdea /* reset the controller */ 894ec6e1b40SIrina Tirdea error = goodix_reset(ts); 895ec6e1b40SIrina Tirdea if (error) { 896ec6e1b40SIrina Tirdea dev_err(&client->dev, "Controller reset failed.\n"); 897ec6e1b40SIrina Tirdea return error; 898ec6e1b40SIrina Tirdea } 899ec6e1b40SIrina Tirdea } 900ec6e1b40SIrina Tirdea 901ca96ea86SBastien Nocera error = goodix_i2c_test(client); 902ca96ea86SBastien Nocera if (error) { 903ca96ea86SBastien Nocera dev_err(&client->dev, "I2C communication failure: %d\n", error); 904ca96ea86SBastien Nocera return error; 905ca96ea86SBastien Nocera } 906ca96ea86SBastien Nocera 90768caf858SIrina Tirdea error = goodix_read_version(ts); 908ca96ea86SBastien Nocera if (error) { 909ca96ea86SBastien Nocera dev_err(&client->dev, "Read version failed.\n"); 910ca96ea86SBastien Nocera return error; 911ca96ea86SBastien Nocera } 912ca96ea86SBastien Nocera 91325309004SMarcin Niestroj ts->chip = goodix_get_chip_data(ts->id); 914a779fbc6SIrina Tirdea 91568caf858SIrina Tirdea if (ts->gpiod_int && ts->gpiod_rst) { 91668caf858SIrina Tirdea /* update device config */ 91768caf858SIrina Tirdea ts->cfg_name = devm_kasprintf(&client->dev, GFP_KERNEL, 91868caf858SIrina Tirdea "goodix_%d_cfg.bin", ts->id); 91968caf858SIrina Tirdea if (!ts->cfg_name) 92068caf858SIrina Tirdea return -ENOMEM; 921ca96ea86SBastien Nocera 92268caf858SIrina Tirdea error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name, 92368caf858SIrina Tirdea &client->dev, GFP_KERNEL, ts, 92468caf858SIrina Tirdea goodix_config_cb); 925ca96ea86SBastien Nocera if (error) { 92668caf858SIrina Tirdea dev_err(&client->dev, 92768caf858SIrina Tirdea "Failed to invoke firmware loader: %d\n", 92868caf858SIrina Tirdea error); 929ca96ea86SBastien Nocera return error; 930ca96ea86SBastien Nocera } 931ca96ea86SBastien Nocera 932ca96ea86SBastien Nocera return 0; 93368caf858SIrina Tirdea } else { 93468caf858SIrina Tirdea error = goodix_configure_dev(ts); 93568caf858SIrina Tirdea if (error) 93668caf858SIrina Tirdea return error; 93768caf858SIrina Tirdea } 93868caf858SIrina Tirdea 93968caf858SIrina Tirdea return 0; 94068caf858SIrina Tirdea } 94168caf858SIrina Tirdea 94268caf858SIrina Tirdea static int goodix_ts_remove(struct i2c_client *client) 94368caf858SIrina Tirdea { 94468caf858SIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 94568caf858SIrina Tirdea 94668caf858SIrina Tirdea if (ts->gpiod_int && ts->gpiod_rst) 94768caf858SIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 94868caf858SIrina Tirdea 94968caf858SIrina Tirdea return 0; 950ca96ea86SBastien Nocera } 951ca96ea86SBastien Nocera 9525ab09d6aSIrina Tirdea static int __maybe_unused goodix_suspend(struct device *dev) 9535ab09d6aSIrina Tirdea { 9545ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 9555ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 9565ab09d6aSIrina Tirdea int error; 9575ab09d6aSIrina Tirdea 9585ab09d6aSIrina Tirdea /* We need gpio pins to suspend/resume */ 959faec44b6SHans de Goede if (!ts->gpiod_int || !ts->gpiod_rst) { 960faec44b6SHans de Goede disable_irq(client->irq); 9615ab09d6aSIrina Tirdea return 0; 962faec44b6SHans de Goede } 9635ab09d6aSIrina Tirdea 9645ab09d6aSIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 9655ab09d6aSIrina Tirdea 9665ab09d6aSIrina Tirdea /* Free IRQ as IRQ pin is used as output in the suspend sequence */ 9675ab09d6aSIrina Tirdea goodix_free_irq(ts); 9685ab09d6aSIrina Tirdea 9695ab09d6aSIrina Tirdea /* Output LOW on the INT pin for 5 ms */ 9705ab09d6aSIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, 0); 9715ab09d6aSIrina Tirdea if (error) { 9725ab09d6aSIrina Tirdea goodix_request_irq(ts); 9735ab09d6aSIrina Tirdea return error; 9745ab09d6aSIrina Tirdea } 9755ab09d6aSIrina Tirdea 9765ab09d6aSIrina Tirdea usleep_range(5000, 6000); 9775ab09d6aSIrina Tirdea 9785ab09d6aSIrina Tirdea error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND, 9795ab09d6aSIrina Tirdea GOODIX_CMD_SCREEN_OFF); 9805ab09d6aSIrina Tirdea if (error) { 9815ab09d6aSIrina Tirdea dev_err(&ts->client->dev, "Screen off command failed\n"); 9825ab09d6aSIrina Tirdea gpiod_direction_input(ts->gpiod_int); 9835ab09d6aSIrina Tirdea goodix_request_irq(ts); 9845ab09d6aSIrina Tirdea return -EAGAIN; 9855ab09d6aSIrina Tirdea } 9865ab09d6aSIrina Tirdea 9875ab09d6aSIrina Tirdea /* 9885ab09d6aSIrina Tirdea * The datasheet specifies that the interval between sending screen-off 9895ab09d6aSIrina Tirdea * command and wake-up should be longer than 58 ms. To avoid waking up 9905ab09d6aSIrina Tirdea * sooner, delay 58ms here. 9915ab09d6aSIrina Tirdea */ 9925ab09d6aSIrina Tirdea msleep(58); 9935ab09d6aSIrina Tirdea return 0; 9945ab09d6aSIrina Tirdea } 9955ab09d6aSIrina Tirdea 9965ab09d6aSIrina Tirdea static int __maybe_unused goodix_resume(struct device *dev) 9975ab09d6aSIrina Tirdea { 9985ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 9995ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 10005ab09d6aSIrina Tirdea int error; 10015ab09d6aSIrina Tirdea 1002faec44b6SHans de Goede if (!ts->gpiod_int || !ts->gpiod_rst) { 1003faec44b6SHans de Goede enable_irq(client->irq); 10045ab09d6aSIrina Tirdea return 0; 1005faec44b6SHans de Goede } 10065ab09d6aSIrina Tirdea 10075ab09d6aSIrina Tirdea /* 10085ab09d6aSIrina Tirdea * Exit sleep mode by outputting HIGH level to INT pin 10095ab09d6aSIrina Tirdea * for 2ms~5ms. 10105ab09d6aSIrina Tirdea */ 10115ab09d6aSIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, 1); 10125ab09d6aSIrina Tirdea if (error) 10135ab09d6aSIrina Tirdea return error; 10145ab09d6aSIrina Tirdea 10155ab09d6aSIrina Tirdea usleep_range(2000, 5000); 10165ab09d6aSIrina Tirdea 10175ab09d6aSIrina Tirdea error = goodix_int_sync(ts); 10185ab09d6aSIrina Tirdea if (error) 10195ab09d6aSIrina Tirdea return error; 10205ab09d6aSIrina Tirdea 10215ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 10225ab09d6aSIrina Tirdea if (error) 10235ab09d6aSIrina Tirdea return error; 10245ab09d6aSIrina Tirdea 10255ab09d6aSIrina Tirdea return 0; 10265ab09d6aSIrina Tirdea } 10275ab09d6aSIrina Tirdea 10285ab09d6aSIrina Tirdea static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume); 10295ab09d6aSIrina Tirdea 1030ca96ea86SBastien Nocera static const struct i2c_device_id goodix_ts_id[] = { 1031ca96ea86SBastien Nocera { "GDIX1001:00", 0 }, 1032ca96ea86SBastien Nocera { } 1033ca96ea86SBastien Nocera }; 10342e9e910eSJavier Martinez Canillas MODULE_DEVICE_TABLE(i2c, goodix_ts_id); 1035ca96ea86SBastien Nocera 1036771d8f1bSAleksei Mamlin #ifdef CONFIG_ACPI 1037ca96ea86SBastien Nocera static const struct acpi_device_id goodix_acpi_match[] = { 1038ca96ea86SBastien Nocera { "GDIX1001", 0 }, 10395ca4d1aeSEthan Lee { "GDIX1002", 0 }, 1040ca96ea86SBastien Nocera { } 1041ca96ea86SBastien Nocera }; 1042ca96ea86SBastien Nocera MODULE_DEVICE_TABLE(acpi, goodix_acpi_match); 1043771d8f1bSAleksei Mamlin #endif 1044771d8f1bSAleksei Mamlin 1045771d8f1bSAleksei Mamlin #ifdef CONFIG_OF 1046771d8f1bSAleksei Mamlin static const struct of_device_id goodix_of_match[] = { 104725309004SMarcin Niestroj { .compatible = "goodix,gt1151" }, 1048a5f50c50SJagan Teki { .compatible = "goodix,gt5663" }, 104984ef1b33SGuido Günther { .compatible = "goodix,gt5688" }, 1050771d8f1bSAleksei Mamlin { .compatible = "goodix,gt911" }, 1051771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9110" }, 1052771d8f1bSAleksei Mamlin { .compatible = "goodix,gt912" }, 1053771d8f1bSAleksei Mamlin { .compatible = "goodix,gt927" }, 1054771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9271" }, 1055771d8f1bSAleksei Mamlin { .compatible = "goodix,gt928" }, 1056771d8f1bSAleksei Mamlin { .compatible = "goodix,gt967" }, 1057771d8f1bSAleksei Mamlin { } 1058771d8f1bSAleksei Mamlin }; 1059771d8f1bSAleksei Mamlin MODULE_DEVICE_TABLE(of, goodix_of_match); 1060771d8f1bSAleksei Mamlin #endif 1061ca96ea86SBastien Nocera 1062ca96ea86SBastien Nocera static struct i2c_driver goodix_ts_driver = { 1063ca96ea86SBastien Nocera .probe = goodix_ts_probe, 106468caf858SIrina Tirdea .remove = goodix_ts_remove, 1065ca96ea86SBastien Nocera .id_table = goodix_ts_id, 1066ca96ea86SBastien Nocera .driver = { 1067ca96ea86SBastien Nocera .name = "Goodix-TS", 1068771d8f1bSAleksei Mamlin .acpi_match_table = ACPI_PTR(goodix_acpi_match), 1069771d8f1bSAleksei Mamlin .of_match_table = of_match_ptr(goodix_of_match), 10705ab09d6aSIrina Tirdea .pm = &goodix_pm_ops, 1071ca96ea86SBastien Nocera }, 1072ca96ea86SBastien Nocera }; 1073ca96ea86SBastien Nocera module_i2c_driver(goodix_ts_driver); 1074ca96ea86SBastien Nocera 1075ca96ea86SBastien Nocera MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); 1076ca96ea86SBastien Nocera MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>"); 1077ca96ea86SBastien Nocera MODULE_DESCRIPTION("Goodix touchscreen driver"); 1078ca96ea86SBastien Nocera MODULE_LICENSE("GPL v2"); 1079