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 { 1328b5a359cSBastien Nocera .ident = "WinBook TW100", 1338b5a359cSBastien Nocera .matches = { 1348b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 1358b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW100") 1368b5a359cSBastien Nocera } 1378b5a359cSBastien Nocera }, 1388b5a359cSBastien Nocera { 1398b5a359cSBastien Nocera .ident = "WinBook TW700", 1408b5a359cSBastien Nocera .matches = { 1418b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 1428b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW700") 1438b5a359cSBastien Nocera }, 1448b5a359cSBastien Nocera }, 1458b5a359cSBastien Nocera #endif 1468b5a359cSBastien Nocera {} 1478b5a359cSBastien Nocera }; 1488b5a359cSBastien Nocera 149bd3b8480SYauhen Kharuzhy static const struct dmi_system_id nine_bytes_report[] = { 150bd3b8480SYauhen Kharuzhy #if defined(CONFIG_DMI) && defined(CONFIG_X86) 151bd3b8480SYauhen Kharuzhy { 152bd3b8480SYauhen Kharuzhy .ident = "Lenovo YogaBook", 153bd3b8480SYauhen Kharuzhy /* YB1-X91L/F and YB1-X90L/F */ 154bd3b8480SYauhen Kharuzhy .matches = { 155bd3b8480SYauhen Kharuzhy DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X9") 156bd3b8480SYauhen Kharuzhy } 157bd3b8480SYauhen Kharuzhy }, 158bd3b8480SYauhen Kharuzhy #endif 159bd3b8480SYauhen Kharuzhy {} 160bd3b8480SYauhen Kharuzhy }; 161bd3b8480SYauhen Kharuzhy 162ca96ea86SBastien Nocera /** 163ca96ea86SBastien Nocera * goodix_i2c_read - read data from a register of the i2c slave device. 164ca96ea86SBastien Nocera * 165ca96ea86SBastien Nocera * @client: i2c device. 166ca96ea86SBastien Nocera * @reg: the register to read from. 167ca96ea86SBastien Nocera * @buf: raw write data buffer. 168ca96ea86SBastien Nocera * @len: length of the buffer to write 169ca96ea86SBastien Nocera */ 170ca96ea86SBastien Nocera static int goodix_i2c_read(struct i2c_client *client, 171ca96ea86SBastien Nocera u16 reg, u8 *buf, int len) 172ca96ea86SBastien Nocera { 173ca96ea86SBastien Nocera struct i2c_msg msgs[2]; 174fafef982SMarcin Niestroj __be16 wbuf = cpu_to_be16(reg); 175ca96ea86SBastien Nocera int ret; 176ca96ea86SBastien Nocera 177ca96ea86SBastien Nocera msgs[0].flags = 0; 178ca96ea86SBastien Nocera msgs[0].addr = client->addr; 179ca96ea86SBastien Nocera msgs[0].len = 2; 180ca96ea86SBastien Nocera msgs[0].buf = (u8 *)&wbuf; 181ca96ea86SBastien Nocera 182ca96ea86SBastien Nocera msgs[1].flags = I2C_M_RD; 183ca96ea86SBastien Nocera msgs[1].addr = client->addr; 184ca96ea86SBastien Nocera msgs[1].len = len; 185ca96ea86SBastien Nocera msgs[1].buf = buf; 186ca96ea86SBastien Nocera 187ca96ea86SBastien Nocera ret = i2c_transfer(client->adapter, msgs, 2); 188ca96ea86SBastien Nocera return ret < 0 ? ret : (ret != ARRAY_SIZE(msgs) ? -EIO : 0); 189ca96ea86SBastien Nocera } 190ca96ea86SBastien Nocera 19168caf858SIrina Tirdea /** 19268caf858SIrina Tirdea * goodix_i2c_write - write data to a register of the i2c slave device. 19368caf858SIrina Tirdea * 19468caf858SIrina Tirdea * @client: i2c device. 19568caf858SIrina Tirdea * @reg: the register to write to. 19668caf858SIrina Tirdea * @buf: raw data buffer to write. 19768caf858SIrina Tirdea * @len: length of the buffer to write 19868caf858SIrina Tirdea */ 19968caf858SIrina Tirdea static int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf, 20068caf858SIrina Tirdea unsigned len) 20168caf858SIrina Tirdea { 20268caf858SIrina Tirdea u8 *addr_buf; 20368caf858SIrina Tirdea struct i2c_msg msg; 20468caf858SIrina Tirdea int ret; 20568caf858SIrina Tirdea 20668caf858SIrina Tirdea addr_buf = kmalloc(len + 2, GFP_KERNEL); 20768caf858SIrina Tirdea if (!addr_buf) 20868caf858SIrina Tirdea return -ENOMEM; 20968caf858SIrina Tirdea 21068caf858SIrina Tirdea addr_buf[0] = reg >> 8; 21168caf858SIrina Tirdea addr_buf[1] = reg & 0xFF; 21268caf858SIrina Tirdea memcpy(&addr_buf[2], buf, len); 21368caf858SIrina Tirdea 21468caf858SIrina Tirdea msg.flags = 0; 21568caf858SIrina Tirdea msg.addr = client->addr; 21668caf858SIrina Tirdea msg.buf = addr_buf; 21768caf858SIrina Tirdea msg.len = len + 2; 21868caf858SIrina Tirdea 21968caf858SIrina Tirdea ret = i2c_transfer(client->adapter, &msg, 1); 22068caf858SIrina Tirdea kfree(addr_buf); 22168caf858SIrina Tirdea return ret < 0 ? ret : (ret != 1 ? -EIO : 0); 22268caf858SIrina Tirdea } 22368caf858SIrina Tirdea 2245ab09d6aSIrina Tirdea static int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value) 2255ab09d6aSIrina Tirdea { 2265ab09d6aSIrina Tirdea return goodix_i2c_write(client, reg, &value, sizeof(value)); 2275ab09d6aSIrina Tirdea } 2285ab09d6aSIrina Tirdea 22925309004SMarcin Niestroj static const struct goodix_chip_data *goodix_get_chip_data(u16 id) 230a779fbc6SIrina Tirdea { 231a779fbc6SIrina Tirdea switch (id) { 23225309004SMarcin Niestroj case 1151: 233a5f50c50SJagan Teki case 5663: 23484ef1b33SGuido Günther case 5688: 23525309004SMarcin Niestroj return >1x_chip_data; 23625309004SMarcin Niestroj 237a779fbc6SIrina Tirdea case 911: 238a779fbc6SIrina Tirdea case 9271: 239a779fbc6SIrina Tirdea case 9110: 240a779fbc6SIrina Tirdea case 927: 241a779fbc6SIrina Tirdea case 928: 24225309004SMarcin Niestroj return >911_chip_data; 243a779fbc6SIrina Tirdea 244a779fbc6SIrina Tirdea case 912: 245a779fbc6SIrina Tirdea case 967: 24625309004SMarcin Niestroj return >967_chip_data; 247a779fbc6SIrina Tirdea 248a779fbc6SIrina Tirdea default: 24925309004SMarcin Niestroj return >9x_chip_data; 250a779fbc6SIrina Tirdea } 251a779fbc6SIrina Tirdea } 252a779fbc6SIrina Tirdea 253ca96ea86SBastien Nocera static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data) 254ca96ea86SBastien Nocera { 2559b5db7aaSPaul Cercueil unsigned long max_timeout; 256ca96ea86SBastien Nocera int touch_num; 257ca96ea86SBastien Nocera int error; 258ca96ea86SBastien Nocera 2599b5db7aaSPaul Cercueil /* 2609b5db7aaSPaul Cercueil * The 'buffer status' bit, which indicates that the data is valid, is 2619b5db7aaSPaul Cercueil * not set as soon as the interrupt is raised, but slightly after. 2629b5db7aaSPaul Cercueil * This takes around 10 ms to happen, so we poll for 20 ms. 2639b5db7aaSPaul Cercueil */ 2649b5db7aaSPaul Cercueil max_timeout = jiffies + msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT); 2659b5db7aaSPaul Cercueil do { 2669b5db7aaSPaul Cercueil error = goodix_i2c_read(ts->client, GOODIX_READ_COOR_ADDR, 267bd3b8480SYauhen Kharuzhy data, ts->contact_size + 1); 268ca96ea86SBastien Nocera if (error) { 2699b5db7aaSPaul Cercueil dev_err(&ts->client->dev, "I2C transfer error: %d\n", 2709b5db7aaSPaul Cercueil error); 271ca96ea86SBastien Nocera return error; 272ca96ea86SBastien Nocera } 273ca96ea86SBastien Nocera 2749b5db7aaSPaul Cercueil if (data[0] & GOODIX_BUFFER_STATUS_READY) { 275ca96ea86SBastien Nocera touch_num = data[0] & 0x0f; 276a7ac7c95SAleksei Mamlin if (touch_num > ts->max_touch_num) 277ca96ea86SBastien Nocera return -EPROTO; 278ca96ea86SBastien Nocera 279ca96ea86SBastien Nocera if (touch_num > 1) { 280bd3b8480SYauhen Kharuzhy data += 1 + ts->contact_size; 281ca96ea86SBastien Nocera error = goodix_i2c_read(ts->client, 282ca96ea86SBastien Nocera GOODIX_READ_COOR_ADDR + 283bd3b8480SYauhen Kharuzhy 1 + ts->contact_size, 284ca96ea86SBastien Nocera data, 285bd3b8480SYauhen Kharuzhy ts->contact_size * 2869b5db7aaSPaul Cercueil (touch_num - 1)); 287ca96ea86SBastien Nocera if (error) 288ca96ea86SBastien Nocera return error; 289ca96ea86SBastien Nocera } 290ca96ea86SBastien Nocera 291ca96ea86SBastien Nocera return touch_num; 292ca96ea86SBastien Nocera } 293ca96ea86SBastien Nocera 2949b5db7aaSPaul Cercueil usleep_range(1000, 2000); /* Poll every 1 - 2 ms */ 2959b5db7aaSPaul Cercueil } while (time_before(jiffies, max_timeout)); 2969b5db7aaSPaul Cercueil 2979b5db7aaSPaul Cercueil /* 2989b5db7aaSPaul Cercueil * The Goodix panel will send spurious interrupts after a 2999b5db7aaSPaul Cercueil * 'finger up' event, which will always cause a timeout. 3009b5db7aaSPaul Cercueil */ 3019b5db7aaSPaul Cercueil return 0; 3029b5db7aaSPaul Cercueil } 3039b5db7aaSPaul Cercueil 304bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_8b(struct goodix_ts_data *ts, u8 *coor_data) 305ca96ea86SBastien Nocera { 306ca96ea86SBastien Nocera int id = coor_data[0] & 0x0F; 307ca96ea86SBastien Nocera int input_x = get_unaligned_le16(&coor_data[1]); 308ca96ea86SBastien Nocera int input_y = get_unaligned_le16(&coor_data[3]); 309ca96ea86SBastien Nocera int input_w = get_unaligned_le16(&coor_data[5]); 310ca96ea86SBastien Nocera 311ca96ea86SBastien Nocera input_mt_slot(ts->input_dev, id); 312ca96ea86SBastien Nocera input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 313fafef982SMarcin Niestroj touchscreen_report_pos(ts->input_dev, &ts->prop, 314fafef982SMarcin Niestroj input_x, input_y, true); 315ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 316ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 317ca96ea86SBastien Nocera } 318ca96ea86SBastien Nocera 319bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_9b(struct goodix_ts_data *ts, u8 *coor_data) 320bd3b8480SYauhen Kharuzhy { 321bd3b8480SYauhen Kharuzhy int id = coor_data[1] & 0x0F; 322bd3b8480SYauhen Kharuzhy int input_x = get_unaligned_le16(&coor_data[3]); 323bd3b8480SYauhen Kharuzhy int input_y = get_unaligned_le16(&coor_data[5]); 324bd3b8480SYauhen Kharuzhy int input_w = get_unaligned_le16(&coor_data[7]); 325bd3b8480SYauhen Kharuzhy 326bd3b8480SYauhen Kharuzhy input_mt_slot(ts->input_dev, id); 327bd3b8480SYauhen Kharuzhy input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 328bd3b8480SYauhen Kharuzhy touchscreen_report_pos(ts->input_dev, &ts->prop, 329bd3b8480SYauhen Kharuzhy input_x, input_y, true); 330bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 331bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 332bd3b8480SYauhen Kharuzhy } 333bd3b8480SYauhen Kharuzhy 334ca96ea86SBastien Nocera /** 335ca96ea86SBastien Nocera * goodix_process_events - Process incoming events 336ca96ea86SBastien Nocera * 337ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 338ca96ea86SBastien Nocera * 339ca96ea86SBastien Nocera * Called when the IRQ is triggered. Read the current device state, and push 340ca96ea86SBastien Nocera * the input events to the user space. 341ca96ea86SBastien Nocera */ 342ca96ea86SBastien Nocera static void goodix_process_events(struct goodix_ts_data *ts) 343ca96ea86SBastien Nocera { 344bd3b8480SYauhen Kharuzhy u8 point_data[1 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS]; 345ca96ea86SBastien Nocera int touch_num; 346ca96ea86SBastien Nocera int i; 347ca96ea86SBastien Nocera 348ca96ea86SBastien Nocera touch_num = goodix_ts_read_input_report(ts, point_data); 349ca96ea86SBastien Nocera if (touch_num < 0) 350ca96ea86SBastien Nocera return; 351ca96ea86SBastien Nocera 3524a54feeaSSergei A. Trusov /* 3534a54feeaSSergei A. Trusov * Bit 4 of the first byte reports the status of the capacitive 3544a54feeaSSergei A. Trusov * Windows/Home button. 3554a54feeaSSergei A. Trusov */ 3564a54feeaSSergei A. Trusov input_report_key(ts->input_dev, KEY_LEFTMETA, point_data[0] & BIT(4)); 3574a54feeaSSergei A. Trusov 358ca96ea86SBastien Nocera for (i = 0; i < touch_num; i++) 359bd3b8480SYauhen Kharuzhy if (ts->contact_size == 9) 360bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_9b(ts, 361bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 362bd3b8480SYauhen Kharuzhy else 363bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_8b(ts, 364bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 365ca96ea86SBastien Nocera 366ca96ea86SBastien Nocera input_mt_sync_frame(ts->input_dev); 367ca96ea86SBastien Nocera input_sync(ts->input_dev); 368ca96ea86SBastien Nocera } 369ca96ea86SBastien Nocera 370ca96ea86SBastien Nocera /** 371ca96ea86SBastien Nocera * goodix_ts_irq_handler - The IRQ handler 372ca96ea86SBastien Nocera * 373ca96ea86SBastien Nocera * @irq: interrupt number. 374ca96ea86SBastien Nocera * @dev_id: private data pointer. 375ca96ea86SBastien Nocera */ 376ca96ea86SBastien Nocera static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id) 377ca96ea86SBastien Nocera { 378ca96ea86SBastien Nocera struct goodix_ts_data *ts = dev_id; 379ca96ea86SBastien Nocera 380ca96ea86SBastien Nocera goodix_process_events(ts); 381ca96ea86SBastien Nocera 3825d655b35SIrina Tirdea if (goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0) < 0) 383ca96ea86SBastien Nocera dev_err(&ts->client->dev, "I2C write end_cmd error\n"); 384ca96ea86SBastien Nocera 385ca96ea86SBastien Nocera return IRQ_HANDLED; 386ca96ea86SBastien Nocera } 387ca96ea86SBastien Nocera 3885ab09d6aSIrina Tirdea static void goodix_free_irq(struct goodix_ts_data *ts) 3895ab09d6aSIrina Tirdea { 3905ab09d6aSIrina Tirdea devm_free_irq(&ts->client->dev, ts->client->irq, ts); 3915ab09d6aSIrina Tirdea } 3925ab09d6aSIrina Tirdea 3935ab09d6aSIrina Tirdea static int goodix_request_irq(struct goodix_ts_data *ts) 3945ab09d6aSIrina Tirdea { 3955ab09d6aSIrina Tirdea return devm_request_threaded_irq(&ts->client->dev, ts->client->irq, 3965ab09d6aSIrina Tirdea NULL, goodix_ts_irq_handler, 3975ab09d6aSIrina Tirdea ts->irq_flags, ts->client->name, ts); 3985ab09d6aSIrina Tirdea } 3995ab09d6aSIrina Tirdea 40025309004SMarcin Niestroj static int goodix_check_cfg_8(struct goodix_ts_data *ts, 40168caf858SIrina Tirdea const struct firmware *cfg) 40268caf858SIrina Tirdea { 40325309004SMarcin Niestroj int i, raw_cfg_len = cfg->size - 2; 40468caf858SIrina Tirdea u8 check_sum = 0; 40568caf858SIrina Tirdea 40668caf858SIrina Tirdea for (i = 0; i < raw_cfg_len; i++) 40768caf858SIrina Tirdea check_sum += cfg->data[i]; 40868caf858SIrina Tirdea check_sum = (~check_sum) + 1; 40968caf858SIrina Tirdea if (check_sum != cfg->data[raw_cfg_len]) { 41068caf858SIrina Tirdea dev_err(&ts->client->dev, 41168caf858SIrina Tirdea "The checksum of the config fw is not correct"); 41268caf858SIrina Tirdea return -EINVAL; 41368caf858SIrina Tirdea } 41468caf858SIrina Tirdea 41568caf858SIrina Tirdea if (cfg->data[raw_cfg_len + 1] != 1) { 41668caf858SIrina Tirdea dev_err(&ts->client->dev, 41768caf858SIrina Tirdea "Config fw must have Config_Fresh register set"); 41868caf858SIrina Tirdea return -EINVAL; 41968caf858SIrina Tirdea } 42068caf858SIrina Tirdea 42168caf858SIrina Tirdea return 0; 42268caf858SIrina Tirdea } 42368caf858SIrina Tirdea 42425309004SMarcin Niestroj static int goodix_check_cfg_16(struct goodix_ts_data *ts, 42525309004SMarcin Niestroj const struct firmware *cfg) 42625309004SMarcin Niestroj { 42725309004SMarcin Niestroj int i, raw_cfg_len = cfg->size - 3; 42825309004SMarcin Niestroj u16 check_sum = 0; 42925309004SMarcin Niestroj 43025309004SMarcin Niestroj for (i = 0; i < raw_cfg_len; i += 2) 43125309004SMarcin Niestroj check_sum += get_unaligned_be16(&cfg->data[i]); 43225309004SMarcin Niestroj check_sum = (~check_sum) + 1; 43325309004SMarcin Niestroj if (check_sum != get_unaligned_be16(&cfg->data[raw_cfg_len])) { 43425309004SMarcin Niestroj dev_err(&ts->client->dev, 43525309004SMarcin Niestroj "The checksum of the config fw is not correct"); 43625309004SMarcin Niestroj return -EINVAL; 43725309004SMarcin Niestroj } 43825309004SMarcin Niestroj 43925309004SMarcin Niestroj if (cfg->data[raw_cfg_len + 2] != 1) { 44025309004SMarcin Niestroj dev_err(&ts->client->dev, 44125309004SMarcin Niestroj "Config fw must have Config_Fresh register set"); 44225309004SMarcin Niestroj return -EINVAL; 44325309004SMarcin Niestroj } 44425309004SMarcin Niestroj 44525309004SMarcin Niestroj return 0; 44625309004SMarcin Niestroj } 44725309004SMarcin Niestroj 44825309004SMarcin Niestroj /** 44925309004SMarcin Niestroj * goodix_check_cfg - Checks if config fw is valid 45025309004SMarcin Niestroj * 45125309004SMarcin Niestroj * @ts: goodix_ts_data pointer 45225309004SMarcin Niestroj * @cfg: firmware config data 45325309004SMarcin Niestroj */ 45425309004SMarcin Niestroj static int goodix_check_cfg(struct goodix_ts_data *ts, 45525309004SMarcin Niestroj const struct firmware *cfg) 45625309004SMarcin Niestroj { 45725309004SMarcin Niestroj if (cfg->size > GOODIX_CONFIG_MAX_LENGTH) { 45825309004SMarcin Niestroj dev_err(&ts->client->dev, 45925309004SMarcin Niestroj "The length of the config fw is not correct"); 46025309004SMarcin Niestroj return -EINVAL; 46125309004SMarcin Niestroj } 46225309004SMarcin Niestroj 46325309004SMarcin Niestroj return ts->chip->check_config(ts, cfg); 46425309004SMarcin Niestroj } 46525309004SMarcin Niestroj 46668caf858SIrina Tirdea /** 46768caf858SIrina Tirdea * goodix_send_cfg - Write fw config to device 46868caf858SIrina Tirdea * 46968caf858SIrina Tirdea * @ts: goodix_ts_data pointer 47068caf858SIrina Tirdea * @cfg: config firmware to write to device 47168caf858SIrina Tirdea */ 47268caf858SIrina Tirdea static int goodix_send_cfg(struct goodix_ts_data *ts, 47368caf858SIrina Tirdea const struct firmware *cfg) 47468caf858SIrina Tirdea { 47568caf858SIrina Tirdea int error; 47668caf858SIrina Tirdea 47768caf858SIrina Tirdea error = goodix_check_cfg(ts, cfg); 47868caf858SIrina Tirdea if (error) 47968caf858SIrina Tirdea return error; 48068caf858SIrina Tirdea 48125309004SMarcin Niestroj error = goodix_i2c_write(ts->client, ts->chip->config_addr, cfg->data, 48268caf858SIrina Tirdea cfg->size); 48368caf858SIrina Tirdea if (error) { 48468caf858SIrina Tirdea dev_err(&ts->client->dev, "Failed to write config data: %d", 48568caf858SIrina Tirdea error); 48668caf858SIrina Tirdea return error; 48768caf858SIrina Tirdea } 48868caf858SIrina Tirdea dev_dbg(&ts->client->dev, "Config sent successfully."); 48968caf858SIrina Tirdea 49068caf858SIrina Tirdea /* Let the firmware reconfigure itself, so sleep for 10ms */ 49168caf858SIrina Tirdea usleep_range(10000, 11000); 49268caf858SIrina Tirdea 49368caf858SIrina Tirdea return 0; 49468caf858SIrina Tirdea } 49568caf858SIrina Tirdea 496ec6e1b40SIrina Tirdea static int goodix_int_sync(struct goodix_ts_data *ts) 497ec6e1b40SIrina Tirdea { 498ec6e1b40SIrina Tirdea int error; 499ec6e1b40SIrina Tirdea 500ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, 0); 501ec6e1b40SIrina Tirdea if (error) 502ec6e1b40SIrina Tirdea return error; 503ec6e1b40SIrina Tirdea 504ec6e1b40SIrina Tirdea msleep(50); /* T5: 50ms */ 505ec6e1b40SIrina Tirdea 506ec6e1b40SIrina Tirdea error = gpiod_direction_input(ts->gpiod_int); 507ec6e1b40SIrina Tirdea if (error) 508ec6e1b40SIrina Tirdea return error; 509ec6e1b40SIrina Tirdea 510ec6e1b40SIrina Tirdea return 0; 511ec6e1b40SIrina Tirdea } 512ec6e1b40SIrina Tirdea 513ec6e1b40SIrina Tirdea /** 514ec6e1b40SIrina Tirdea * goodix_reset - Reset device during power on 515ec6e1b40SIrina Tirdea * 516ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 517ec6e1b40SIrina Tirdea */ 518ec6e1b40SIrina Tirdea static int goodix_reset(struct goodix_ts_data *ts) 519ec6e1b40SIrina Tirdea { 520ec6e1b40SIrina Tirdea int error; 521ec6e1b40SIrina Tirdea 522ec6e1b40SIrina Tirdea /* begin select I2C slave addr */ 523ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 0); 524ec6e1b40SIrina Tirdea if (error) 525ec6e1b40SIrina Tirdea return error; 526ec6e1b40SIrina Tirdea 527ec6e1b40SIrina Tirdea msleep(20); /* T2: > 10ms */ 528ec6e1b40SIrina Tirdea 529ec6e1b40SIrina Tirdea /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */ 530ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, ts->client->addr == 0x14); 531ec6e1b40SIrina Tirdea if (error) 532ec6e1b40SIrina Tirdea return error; 533ec6e1b40SIrina Tirdea 534ec6e1b40SIrina Tirdea usleep_range(100, 2000); /* T3: > 100us */ 535ec6e1b40SIrina Tirdea 536ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 1); 537ec6e1b40SIrina Tirdea if (error) 538ec6e1b40SIrina Tirdea return error; 539ec6e1b40SIrina Tirdea 540ec6e1b40SIrina Tirdea usleep_range(6000, 10000); /* T4: > 5ms */ 541ec6e1b40SIrina Tirdea 542ec6e1b40SIrina Tirdea /* end select I2C slave addr */ 543ec6e1b40SIrina Tirdea error = gpiod_direction_input(ts->gpiod_rst); 544ec6e1b40SIrina Tirdea if (error) 545ec6e1b40SIrina Tirdea return error; 546ec6e1b40SIrina Tirdea 547ec6e1b40SIrina Tirdea error = goodix_int_sync(ts); 548ec6e1b40SIrina Tirdea if (error) 549ec6e1b40SIrina Tirdea return error; 550ec6e1b40SIrina Tirdea 551ec6e1b40SIrina Tirdea return 0; 552ec6e1b40SIrina Tirdea } 553ec6e1b40SIrina Tirdea 554ec6e1b40SIrina Tirdea /** 555ec6e1b40SIrina Tirdea * goodix_get_gpio_config - Get GPIO config from ACPI/DT 556ec6e1b40SIrina Tirdea * 557ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 558ec6e1b40SIrina Tirdea */ 559ec6e1b40SIrina Tirdea static int goodix_get_gpio_config(struct goodix_ts_data *ts) 560ec6e1b40SIrina Tirdea { 561ec6e1b40SIrina Tirdea int error; 562ec6e1b40SIrina Tirdea struct device *dev; 563ec6e1b40SIrina Tirdea struct gpio_desc *gpiod; 564ec6e1b40SIrina Tirdea 565ec6e1b40SIrina Tirdea if (!ts->client) 566ec6e1b40SIrina Tirdea return -EINVAL; 567ec6e1b40SIrina Tirdea dev = &ts->client->dev; 568ec6e1b40SIrina Tirdea 569ae97fb58SJagan Teki ts->avdd28 = devm_regulator_get(dev, "AVDD28"); 570ae97fb58SJagan Teki if (IS_ERR(ts->avdd28)) { 571ae97fb58SJagan Teki error = PTR_ERR(ts->avdd28); 572ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 573ae97fb58SJagan Teki dev_err(dev, 574ae97fb58SJagan Teki "Failed to get AVDD28 regulator: %d\n", error); 575ae97fb58SJagan Teki return error; 576ae97fb58SJagan Teki } 577ae97fb58SJagan Teki 578ae97fb58SJagan Teki ts->vddio = devm_regulator_get(dev, "VDDIO"); 579ae97fb58SJagan Teki if (IS_ERR(ts->vddio)) { 580ae97fb58SJagan Teki error = PTR_ERR(ts->vddio); 581ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 582ae97fb58SJagan Teki dev_err(dev, 583ae97fb58SJagan Teki "Failed to get VDDIO regulator: %d\n", error); 584ae97fb58SJagan Teki return error; 585ae97fb58SJagan Teki } 586ae97fb58SJagan Teki 587ec6e1b40SIrina Tirdea /* Get the interrupt GPIO pin number */ 588ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN); 589ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 590ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 591ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 592ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 593ec6e1b40SIrina Tirdea GOODIX_GPIO_INT_NAME, error); 594ec6e1b40SIrina Tirdea return error; 595ec6e1b40SIrina Tirdea } 596ec6e1b40SIrina Tirdea 597ec6e1b40SIrina Tirdea ts->gpiod_int = gpiod; 598ec6e1b40SIrina Tirdea 599ec6e1b40SIrina Tirdea /* Get the reset line GPIO pin number */ 600ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, GPIOD_IN); 601ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 602ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 603ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 604ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 605ec6e1b40SIrina Tirdea GOODIX_GPIO_RST_NAME, error); 606ec6e1b40SIrina Tirdea return error; 607ec6e1b40SIrina Tirdea } 608ec6e1b40SIrina Tirdea 609ec6e1b40SIrina Tirdea ts->gpiod_rst = gpiod; 610ec6e1b40SIrina Tirdea 611ec6e1b40SIrina Tirdea return 0; 612ec6e1b40SIrina Tirdea } 613ec6e1b40SIrina Tirdea 614ca96ea86SBastien Nocera /** 615ca96ea86SBastien Nocera * goodix_read_config - Read the embedded configuration of the panel 616ca96ea86SBastien Nocera * 617ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 618ca96ea86SBastien Nocera * 619ca96ea86SBastien Nocera * Must be called during probe 620ca96ea86SBastien Nocera */ 621ca96ea86SBastien Nocera static void goodix_read_config(struct goodix_ts_data *ts) 622ca96ea86SBastien Nocera { 623ca96ea86SBastien Nocera u8 config[GOODIX_CONFIG_MAX_LENGTH]; 624fafef982SMarcin Niestroj int x_max, y_max; 625ca96ea86SBastien Nocera int error; 626ca96ea86SBastien Nocera 62725309004SMarcin Niestroj error = goodix_i2c_read(ts->client, ts->chip->config_addr, 62825309004SMarcin Niestroj config, ts->chip->config_len); 629ca96ea86SBastien Nocera if (error) { 630fafef982SMarcin Niestroj dev_warn(&ts->client->dev, "Error reading config: %d\n", 631ca96ea86SBastien Nocera error); 632ca96ea86SBastien Nocera ts->int_trigger_type = GOODIX_INT_TRIGGER; 633a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 634ca96ea86SBastien Nocera return; 635ca96ea86SBastien Nocera } 636ca96ea86SBastien Nocera 637a7ac7c95SAleksei Mamlin ts->int_trigger_type = config[TRIGGER_LOC] & 0x03; 638a7ac7c95SAleksei Mamlin ts->max_touch_num = config[MAX_CONTACTS_LOC] & 0x0f; 6398b5a359cSBastien Nocera 640fafef982SMarcin Niestroj x_max = get_unaligned_le16(&config[RESOLUTION_LOC]); 641fafef982SMarcin Niestroj y_max = get_unaligned_le16(&config[RESOLUTION_LOC + 2]); 642fafef982SMarcin Niestroj if (x_max && y_max) { 643fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_X, x_max - 1); 644fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_Y, y_max - 1); 645ca96ea86SBastien Nocera } 64657c80e8eSKarsten Merker } 647ca96ea86SBastien Nocera 648ca96ea86SBastien Nocera /** 649ca96ea86SBastien Nocera * goodix_read_version - Read goodix touchscreen version 650ca96ea86SBastien Nocera * 65168caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 652ca96ea86SBastien Nocera */ 65368caf858SIrina Tirdea static int goodix_read_version(struct goodix_ts_data *ts) 654ca96ea86SBastien Nocera { 655ca96ea86SBastien Nocera int error; 656ca96ea86SBastien Nocera u8 buf[6]; 657e70b0307SIrina Tirdea char id_str[5]; 658ca96ea86SBastien Nocera 65968caf858SIrina Tirdea error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf)); 660ca96ea86SBastien Nocera if (error) { 66168caf858SIrina Tirdea dev_err(&ts->client->dev, "read version failed: %d\n", error); 662ca96ea86SBastien Nocera return error; 663ca96ea86SBastien Nocera } 664ca96ea86SBastien Nocera 665e70b0307SIrina Tirdea memcpy(id_str, buf, 4); 666e70b0307SIrina Tirdea id_str[4] = 0; 66768caf858SIrina Tirdea if (kstrtou16(id_str, 10, &ts->id)) 66868caf858SIrina Tirdea ts->id = 0x1001; 669e70b0307SIrina Tirdea 67068caf858SIrina Tirdea ts->version = get_unaligned_le16(&buf[4]); 671ca96ea86SBastien Nocera 67268caf858SIrina Tirdea dev_info(&ts->client->dev, "ID %d, version: %04x\n", ts->id, 67368caf858SIrina Tirdea ts->version); 674ca96ea86SBastien Nocera 675ca96ea86SBastien Nocera return 0; 676ca96ea86SBastien Nocera } 677ca96ea86SBastien Nocera 678ca96ea86SBastien Nocera /** 679ca96ea86SBastien Nocera * goodix_i2c_test - I2C test function to check if the device answers. 680ca96ea86SBastien Nocera * 681ca96ea86SBastien Nocera * @client: the i2c client 682ca96ea86SBastien Nocera */ 683ca96ea86SBastien Nocera static int goodix_i2c_test(struct i2c_client *client) 684ca96ea86SBastien Nocera { 685ca96ea86SBastien Nocera int retry = 0; 686ca96ea86SBastien Nocera int error; 687ca96ea86SBastien Nocera u8 test; 688ca96ea86SBastien Nocera 689ca96ea86SBastien Nocera while (retry++ < 2) { 69025309004SMarcin Niestroj error = goodix_i2c_read(client, GOODIX_REG_ID, 691ca96ea86SBastien Nocera &test, 1); 692ca96ea86SBastien Nocera if (!error) 693ca96ea86SBastien Nocera return 0; 694ca96ea86SBastien Nocera 695ca96ea86SBastien Nocera dev_err(&client->dev, "i2c test failed attempt %d: %d\n", 696ca96ea86SBastien Nocera retry, error); 697ca96ea86SBastien Nocera msleep(20); 698ca96ea86SBastien Nocera } 699ca96ea86SBastien Nocera 700ca96ea86SBastien Nocera return error; 701ca96ea86SBastien Nocera } 702ca96ea86SBastien Nocera 703ca96ea86SBastien Nocera /** 70468caf858SIrina Tirdea * goodix_configure_dev - Finish device initialization 70568caf858SIrina Tirdea * 70668caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 70768caf858SIrina Tirdea * 70868caf858SIrina Tirdea * Must be called from probe to finish initialization of the device. 70968caf858SIrina Tirdea * Contains the common initialization code for both devices that 71068caf858SIrina Tirdea * declare gpio pins and devices that do not. It is either called 71168caf858SIrina Tirdea * directly from probe or from request_firmware_wait callback. 71268caf858SIrina Tirdea */ 71368caf858SIrina Tirdea static int goodix_configure_dev(struct goodix_ts_data *ts) 71468caf858SIrina Tirdea { 71568caf858SIrina Tirdea int error; 71668caf858SIrina Tirdea 717fafef982SMarcin Niestroj ts->int_trigger_type = GOODIX_INT_TRIGGER; 718fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 719ad48cf5eSKarsten Merker 720fafef982SMarcin Niestroj ts->input_dev = devm_input_allocate_device(&ts->client->dev); 721fafef982SMarcin Niestroj if (!ts->input_dev) { 722fafef982SMarcin Niestroj dev_err(&ts->client->dev, "Failed to allocate input device."); 723fafef982SMarcin Niestroj return -ENOMEM; 724fafef982SMarcin Niestroj } 725fafef982SMarcin Niestroj 726fafef982SMarcin Niestroj ts->input_dev->name = "Goodix Capacitive TouchScreen"; 727fafef982SMarcin Niestroj ts->input_dev->phys = "input/ts"; 728fafef982SMarcin Niestroj ts->input_dev->id.bustype = BUS_I2C; 729fafef982SMarcin Niestroj ts->input_dev->id.vendor = 0x0416; 730fafef982SMarcin Niestroj ts->input_dev->id.product = ts->id; 731fafef982SMarcin Niestroj ts->input_dev->id.version = ts->version; 732fafef982SMarcin Niestroj 733fafef982SMarcin Niestroj /* Capacitive Windows/Home button on some devices */ 734fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_KEY, KEY_LEFTMETA); 735fafef982SMarcin Niestroj 736fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X); 737fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y); 738fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 739fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 740fafef982SMarcin Niestroj 741fafef982SMarcin Niestroj /* Read configuration and apply touchscreen parameters */ 74268caf858SIrina Tirdea goodix_read_config(ts); 74368caf858SIrina Tirdea 744fafef982SMarcin Niestroj /* Try overriding touchscreen parameters via device properties */ 745fafef982SMarcin Niestroj touchscreen_parse_properties(ts->input_dev, true, &ts->prop); 746fafef982SMarcin Niestroj 747fafef982SMarcin Niestroj if (!ts->prop.max_x || !ts->prop.max_y || !ts->max_touch_num) { 748c1c00aa5SGuido Günther dev_err(&ts->client->dev, 749c1c00aa5SGuido Günther "Invalid config (%d, %d, %d), using defaults\n", 750c1c00aa5SGuido Günther ts->prop.max_x, ts->prop.max_y, ts->max_touch_num); 751fafef982SMarcin Niestroj ts->prop.max_x = GOODIX_MAX_WIDTH - 1; 752fafef982SMarcin Niestroj ts->prop.max_y = GOODIX_MAX_HEIGHT - 1; 753fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 754fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 755fafef982SMarcin Niestroj ABS_MT_POSITION_X, ts->prop.max_x); 756fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 757fafef982SMarcin Niestroj ABS_MT_POSITION_Y, ts->prop.max_y); 758fafef982SMarcin Niestroj } 759fafef982SMarcin Niestroj 760fafef982SMarcin Niestroj if (dmi_check_system(rotated_screen)) { 761fafef982SMarcin Niestroj ts->prop.invert_x = true; 762fafef982SMarcin Niestroj ts->prop.invert_y = true; 763fafef982SMarcin Niestroj dev_dbg(&ts->client->dev, 764fafef982SMarcin Niestroj "Applying '180 degrees rotated screen' quirk\n"); 765fafef982SMarcin Niestroj } 766fafef982SMarcin Niestroj 767bd3b8480SYauhen Kharuzhy if (dmi_check_system(nine_bytes_report)) { 768bd3b8480SYauhen Kharuzhy ts->contact_size = 9; 769bd3b8480SYauhen Kharuzhy 770bd3b8480SYauhen Kharuzhy dev_dbg(&ts->client->dev, 771bd3b8480SYauhen Kharuzhy "Non-standard 9-bytes report format quirk\n"); 772bd3b8480SYauhen Kharuzhy } 773bd3b8480SYauhen Kharuzhy 774fafef982SMarcin Niestroj error = input_mt_init_slots(ts->input_dev, ts->max_touch_num, 775fafef982SMarcin Niestroj INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); 776fafef982SMarcin Niestroj if (error) { 777fafef982SMarcin Niestroj dev_err(&ts->client->dev, 778fafef982SMarcin Niestroj "Failed to initialize MT slots: %d", error); 77968caf858SIrina Tirdea return error; 780fafef982SMarcin Niestroj } 781fafef982SMarcin Niestroj 782fafef982SMarcin Niestroj error = input_register_device(ts->input_dev); 783fafef982SMarcin Niestroj if (error) { 784fafef982SMarcin Niestroj dev_err(&ts->client->dev, 785fafef982SMarcin Niestroj "Failed to register input device: %d", error); 786fafef982SMarcin Niestroj return error; 787fafef982SMarcin Niestroj } 78868caf858SIrina Tirdea 7895ab09d6aSIrina Tirdea ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT; 7905ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 79168caf858SIrina Tirdea if (error) { 79268caf858SIrina Tirdea dev_err(&ts->client->dev, "request IRQ failed: %d\n", error); 79368caf858SIrina Tirdea return error; 79468caf858SIrina Tirdea } 79568caf858SIrina Tirdea 79668caf858SIrina Tirdea return 0; 79768caf858SIrina Tirdea } 79868caf858SIrina Tirdea 79968caf858SIrina Tirdea /** 80068caf858SIrina Tirdea * goodix_config_cb - Callback to finish device init 80168caf858SIrina Tirdea * 80268caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 80368caf858SIrina Tirdea * 80468caf858SIrina Tirdea * request_firmware_wait callback that finishes 80568caf858SIrina Tirdea * initialization of the device. 80668caf858SIrina Tirdea */ 80768caf858SIrina Tirdea static void goodix_config_cb(const struct firmware *cfg, void *ctx) 80868caf858SIrina Tirdea { 80968caf858SIrina Tirdea struct goodix_ts_data *ts = ctx; 81068caf858SIrina Tirdea int error; 81168caf858SIrina Tirdea 81268caf858SIrina Tirdea if (cfg) { 81368caf858SIrina Tirdea /* send device configuration to the firmware */ 81468caf858SIrina Tirdea error = goodix_send_cfg(ts, cfg); 81568caf858SIrina Tirdea if (error) 81668caf858SIrina Tirdea goto err_release_cfg; 81768caf858SIrina Tirdea } 81868caf858SIrina Tirdea 81968caf858SIrina Tirdea goodix_configure_dev(ts); 82068caf858SIrina Tirdea 82168caf858SIrina Tirdea err_release_cfg: 82268caf858SIrina Tirdea release_firmware(cfg); 82368caf858SIrina Tirdea complete_all(&ts->firmware_loading_complete); 82468caf858SIrina Tirdea } 82568caf858SIrina Tirdea 826ae97fb58SJagan Teki static void goodix_disable_regulators(void *arg) 827ae97fb58SJagan Teki { 828ae97fb58SJagan Teki struct goodix_ts_data *ts = arg; 829ae97fb58SJagan Teki 830ae97fb58SJagan Teki regulator_disable(ts->vddio); 831ae97fb58SJagan Teki regulator_disable(ts->avdd28); 832ae97fb58SJagan Teki } 833ae97fb58SJagan Teki 834ca96ea86SBastien Nocera static int goodix_ts_probe(struct i2c_client *client, 835ca96ea86SBastien Nocera const struct i2c_device_id *id) 836ca96ea86SBastien Nocera { 837ca96ea86SBastien Nocera struct goodix_ts_data *ts; 838ca96ea86SBastien Nocera int error; 839ca96ea86SBastien Nocera 840ca96ea86SBastien Nocera dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr); 841ca96ea86SBastien Nocera 842ca96ea86SBastien Nocera if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 843ca96ea86SBastien Nocera dev_err(&client->dev, "I2C check functionality failed.\n"); 844ca96ea86SBastien Nocera return -ENXIO; 845ca96ea86SBastien Nocera } 846ca96ea86SBastien Nocera 847ca96ea86SBastien Nocera ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); 848ca96ea86SBastien Nocera if (!ts) 849ca96ea86SBastien Nocera return -ENOMEM; 850ca96ea86SBastien Nocera 851ca96ea86SBastien Nocera ts->client = client; 852ca96ea86SBastien Nocera i2c_set_clientdata(client, ts); 85368caf858SIrina Tirdea init_completion(&ts->firmware_loading_complete); 854bd3b8480SYauhen Kharuzhy ts->contact_size = GOODIX_CONTACT_SIZE; 855ca96ea86SBastien Nocera 856ec6e1b40SIrina Tirdea error = goodix_get_gpio_config(ts); 857ec6e1b40SIrina Tirdea if (error) 858ec6e1b40SIrina Tirdea return error; 859ec6e1b40SIrina Tirdea 860ae97fb58SJagan Teki /* power up the controller */ 861ae97fb58SJagan Teki error = regulator_enable(ts->avdd28); 862ae97fb58SJagan Teki if (error) { 863ae97fb58SJagan Teki dev_err(&client->dev, 864ae97fb58SJagan Teki "Failed to enable AVDD28 regulator: %d\n", 865ae97fb58SJagan Teki error); 866ae97fb58SJagan Teki return error; 867ae97fb58SJagan Teki } 868ae97fb58SJagan Teki 869ae97fb58SJagan Teki error = regulator_enable(ts->vddio); 870ae97fb58SJagan Teki if (error) { 871ae97fb58SJagan Teki dev_err(&client->dev, 872ae97fb58SJagan Teki "Failed to enable VDDIO regulator: %d\n", 873ae97fb58SJagan Teki error); 874ae97fb58SJagan Teki regulator_disable(ts->avdd28); 875ae97fb58SJagan Teki return error; 876ae97fb58SJagan Teki } 877ae97fb58SJagan Teki 878ae97fb58SJagan Teki error = devm_add_action_or_reset(&client->dev, 879ae97fb58SJagan Teki goodix_disable_regulators, ts); 880ae97fb58SJagan Teki if (error) 881ae97fb58SJagan Teki return error; 882ae97fb58SJagan Teki 883ec6e1b40SIrina Tirdea if (ts->gpiod_int && ts->gpiod_rst) { 884ec6e1b40SIrina Tirdea /* reset the controller */ 885ec6e1b40SIrina Tirdea error = goodix_reset(ts); 886ec6e1b40SIrina Tirdea if (error) { 887ec6e1b40SIrina Tirdea dev_err(&client->dev, "Controller reset failed.\n"); 888ec6e1b40SIrina Tirdea return error; 889ec6e1b40SIrina Tirdea } 890ec6e1b40SIrina Tirdea } 891ec6e1b40SIrina Tirdea 892ca96ea86SBastien Nocera error = goodix_i2c_test(client); 893ca96ea86SBastien Nocera if (error) { 894ca96ea86SBastien Nocera dev_err(&client->dev, "I2C communication failure: %d\n", error); 895ca96ea86SBastien Nocera return error; 896ca96ea86SBastien Nocera } 897ca96ea86SBastien Nocera 89868caf858SIrina Tirdea error = goodix_read_version(ts); 899ca96ea86SBastien Nocera if (error) { 900ca96ea86SBastien Nocera dev_err(&client->dev, "Read version failed.\n"); 901ca96ea86SBastien Nocera return error; 902ca96ea86SBastien Nocera } 903ca96ea86SBastien Nocera 90425309004SMarcin Niestroj ts->chip = goodix_get_chip_data(ts->id); 905a779fbc6SIrina Tirdea 90668caf858SIrina Tirdea if (ts->gpiod_int && ts->gpiod_rst) { 90768caf858SIrina Tirdea /* update device config */ 90868caf858SIrina Tirdea ts->cfg_name = devm_kasprintf(&client->dev, GFP_KERNEL, 90968caf858SIrina Tirdea "goodix_%d_cfg.bin", ts->id); 91068caf858SIrina Tirdea if (!ts->cfg_name) 91168caf858SIrina Tirdea return -ENOMEM; 912ca96ea86SBastien Nocera 91368caf858SIrina Tirdea error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name, 91468caf858SIrina Tirdea &client->dev, GFP_KERNEL, ts, 91568caf858SIrina Tirdea goodix_config_cb); 916ca96ea86SBastien Nocera if (error) { 91768caf858SIrina Tirdea dev_err(&client->dev, 91868caf858SIrina Tirdea "Failed to invoke firmware loader: %d\n", 91968caf858SIrina Tirdea error); 920ca96ea86SBastien Nocera return error; 921ca96ea86SBastien Nocera } 922ca96ea86SBastien Nocera 923ca96ea86SBastien Nocera return 0; 92468caf858SIrina Tirdea } else { 92568caf858SIrina Tirdea error = goodix_configure_dev(ts); 92668caf858SIrina Tirdea if (error) 92768caf858SIrina Tirdea return error; 92868caf858SIrina Tirdea } 92968caf858SIrina Tirdea 93068caf858SIrina Tirdea return 0; 93168caf858SIrina Tirdea } 93268caf858SIrina Tirdea 93368caf858SIrina Tirdea static int goodix_ts_remove(struct i2c_client *client) 93468caf858SIrina Tirdea { 93568caf858SIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 93668caf858SIrina Tirdea 93768caf858SIrina Tirdea if (ts->gpiod_int && ts->gpiod_rst) 93868caf858SIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 93968caf858SIrina Tirdea 94068caf858SIrina Tirdea return 0; 941ca96ea86SBastien Nocera } 942ca96ea86SBastien Nocera 9435ab09d6aSIrina Tirdea static int __maybe_unused goodix_suspend(struct device *dev) 9445ab09d6aSIrina Tirdea { 9455ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 9465ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 9475ab09d6aSIrina Tirdea int error; 9485ab09d6aSIrina Tirdea 9495ab09d6aSIrina Tirdea /* We need gpio pins to suspend/resume */ 950faec44b6SHans de Goede if (!ts->gpiod_int || !ts->gpiod_rst) { 951faec44b6SHans de Goede disable_irq(client->irq); 9525ab09d6aSIrina Tirdea return 0; 953faec44b6SHans de Goede } 9545ab09d6aSIrina Tirdea 9555ab09d6aSIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 9565ab09d6aSIrina Tirdea 9575ab09d6aSIrina Tirdea /* Free IRQ as IRQ pin is used as output in the suspend sequence */ 9585ab09d6aSIrina Tirdea goodix_free_irq(ts); 9595ab09d6aSIrina Tirdea 9605ab09d6aSIrina Tirdea /* Output LOW on the INT pin for 5 ms */ 9615ab09d6aSIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, 0); 9625ab09d6aSIrina Tirdea if (error) { 9635ab09d6aSIrina Tirdea goodix_request_irq(ts); 9645ab09d6aSIrina Tirdea return error; 9655ab09d6aSIrina Tirdea } 9665ab09d6aSIrina Tirdea 9675ab09d6aSIrina Tirdea usleep_range(5000, 6000); 9685ab09d6aSIrina Tirdea 9695ab09d6aSIrina Tirdea error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND, 9705ab09d6aSIrina Tirdea GOODIX_CMD_SCREEN_OFF); 9715ab09d6aSIrina Tirdea if (error) { 9725ab09d6aSIrina Tirdea dev_err(&ts->client->dev, "Screen off command failed\n"); 9735ab09d6aSIrina Tirdea gpiod_direction_input(ts->gpiod_int); 9745ab09d6aSIrina Tirdea goodix_request_irq(ts); 9755ab09d6aSIrina Tirdea return -EAGAIN; 9765ab09d6aSIrina Tirdea } 9775ab09d6aSIrina Tirdea 9785ab09d6aSIrina Tirdea /* 9795ab09d6aSIrina Tirdea * The datasheet specifies that the interval between sending screen-off 9805ab09d6aSIrina Tirdea * command and wake-up should be longer than 58 ms. To avoid waking up 9815ab09d6aSIrina Tirdea * sooner, delay 58ms here. 9825ab09d6aSIrina Tirdea */ 9835ab09d6aSIrina Tirdea msleep(58); 9845ab09d6aSIrina Tirdea return 0; 9855ab09d6aSIrina Tirdea } 9865ab09d6aSIrina Tirdea 9875ab09d6aSIrina Tirdea static int __maybe_unused goodix_resume(struct device *dev) 9885ab09d6aSIrina Tirdea { 9895ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 9905ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 9915ab09d6aSIrina Tirdea int error; 9925ab09d6aSIrina Tirdea 993faec44b6SHans de Goede if (!ts->gpiod_int || !ts->gpiod_rst) { 994faec44b6SHans de Goede enable_irq(client->irq); 9955ab09d6aSIrina Tirdea return 0; 996faec44b6SHans de Goede } 9975ab09d6aSIrina Tirdea 9985ab09d6aSIrina Tirdea /* 9995ab09d6aSIrina Tirdea * Exit sleep mode by outputting HIGH level to INT pin 10005ab09d6aSIrina Tirdea * for 2ms~5ms. 10015ab09d6aSIrina Tirdea */ 10025ab09d6aSIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, 1); 10035ab09d6aSIrina Tirdea if (error) 10045ab09d6aSIrina Tirdea return error; 10055ab09d6aSIrina Tirdea 10065ab09d6aSIrina Tirdea usleep_range(2000, 5000); 10075ab09d6aSIrina Tirdea 10085ab09d6aSIrina Tirdea error = goodix_int_sync(ts); 10095ab09d6aSIrina Tirdea if (error) 10105ab09d6aSIrina Tirdea return error; 10115ab09d6aSIrina Tirdea 10125ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 10135ab09d6aSIrina Tirdea if (error) 10145ab09d6aSIrina Tirdea return error; 10155ab09d6aSIrina Tirdea 10165ab09d6aSIrina Tirdea return 0; 10175ab09d6aSIrina Tirdea } 10185ab09d6aSIrina Tirdea 10195ab09d6aSIrina Tirdea static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume); 10205ab09d6aSIrina Tirdea 1021ca96ea86SBastien Nocera static const struct i2c_device_id goodix_ts_id[] = { 1022ca96ea86SBastien Nocera { "GDIX1001:00", 0 }, 1023ca96ea86SBastien Nocera { } 1024ca96ea86SBastien Nocera }; 10252e9e910eSJavier Martinez Canillas MODULE_DEVICE_TABLE(i2c, goodix_ts_id); 1026ca96ea86SBastien Nocera 1027771d8f1bSAleksei Mamlin #ifdef CONFIG_ACPI 1028ca96ea86SBastien Nocera static const struct acpi_device_id goodix_acpi_match[] = { 1029ca96ea86SBastien Nocera { "GDIX1001", 0 }, 10305ca4d1aeSEthan Lee { "GDIX1002", 0 }, 1031ca96ea86SBastien Nocera { } 1032ca96ea86SBastien Nocera }; 1033ca96ea86SBastien Nocera MODULE_DEVICE_TABLE(acpi, goodix_acpi_match); 1034771d8f1bSAleksei Mamlin #endif 1035771d8f1bSAleksei Mamlin 1036771d8f1bSAleksei Mamlin #ifdef CONFIG_OF 1037771d8f1bSAleksei Mamlin static const struct of_device_id goodix_of_match[] = { 103825309004SMarcin Niestroj { .compatible = "goodix,gt1151" }, 1039a5f50c50SJagan Teki { .compatible = "goodix,gt5663" }, 104084ef1b33SGuido Günther { .compatible = "goodix,gt5688" }, 1041771d8f1bSAleksei Mamlin { .compatible = "goodix,gt911" }, 1042771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9110" }, 1043771d8f1bSAleksei Mamlin { .compatible = "goodix,gt912" }, 1044771d8f1bSAleksei Mamlin { .compatible = "goodix,gt927" }, 1045771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9271" }, 1046771d8f1bSAleksei Mamlin { .compatible = "goodix,gt928" }, 1047771d8f1bSAleksei Mamlin { .compatible = "goodix,gt967" }, 1048771d8f1bSAleksei Mamlin { } 1049771d8f1bSAleksei Mamlin }; 1050771d8f1bSAleksei Mamlin MODULE_DEVICE_TABLE(of, goodix_of_match); 1051771d8f1bSAleksei Mamlin #endif 1052ca96ea86SBastien Nocera 1053ca96ea86SBastien Nocera static struct i2c_driver goodix_ts_driver = { 1054ca96ea86SBastien Nocera .probe = goodix_ts_probe, 105568caf858SIrina Tirdea .remove = goodix_ts_remove, 1056ca96ea86SBastien Nocera .id_table = goodix_ts_id, 1057ca96ea86SBastien Nocera .driver = { 1058ca96ea86SBastien Nocera .name = "Goodix-TS", 1059771d8f1bSAleksei Mamlin .acpi_match_table = ACPI_PTR(goodix_acpi_match), 1060771d8f1bSAleksei Mamlin .of_match_table = of_match_ptr(goodix_of_match), 10615ab09d6aSIrina Tirdea .pm = &goodix_pm_ops, 1062ca96ea86SBastien Nocera }, 1063ca96ea86SBastien Nocera }; 1064ca96ea86SBastien Nocera module_i2c_driver(goodix_ts_driver); 1065ca96ea86SBastien Nocera 1066ca96ea86SBastien Nocera MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); 1067ca96ea86SBastien Nocera MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>"); 1068ca96ea86SBastien Nocera MODULE_DESCRIPTION("Goodix touchscreen driver"); 1069ca96ea86SBastien Nocera MODULE_LICENSE("GPL v2"); 1070