1ca96ea86SBastien Nocera /* 2ca96ea86SBastien Nocera * Driver for Goodix Touchscreens 3ca96ea86SBastien Nocera * 4ca96ea86SBastien Nocera * Copyright (c) 2014 Red Hat Inc. 5ad48cf5eSKarsten Merker * Copyright (c) 2015 K. Merker <merker@debian.org> 6ca96ea86SBastien Nocera * 7ca96ea86SBastien Nocera * This code is based on gt9xx.c authored by andrew@goodix.com: 8ca96ea86SBastien Nocera * 9ca96ea86SBastien Nocera * 2010 - 2012 Goodix Technology. 10ca96ea86SBastien Nocera */ 11ca96ea86SBastien Nocera 12ca96ea86SBastien Nocera /* 13ca96ea86SBastien Nocera * This program is free software; you can redistribute it and/or modify it 14ca96ea86SBastien Nocera * under the terms of the GNU General Public License as published by the Free 15ca96ea86SBastien Nocera * Software Foundation; version 2 of the License. 16ca96ea86SBastien Nocera */ 17ca96ea86SBastien Nocera 18ca96ea86SBastien Nocera #include <linux/kernel.h> 198b5a359cSBastien Nocera #include <linux/dmi.h> 2068caf858SIrina Tirdea #include <linux/firmware.h> 21ec6e1b40SIrina Tirdea #include <linux/gpio/consumer.h> 22ca96ea86SBastien Nocera #include <linux/i2c.h> 23ca96ea86SBastien Nocera #include <linux/input.h> 24ca96ea86SBastien Nocera #include <linux/input/mt.h> 25ca96ea86SBastien Nocera #include <linux/module.h> 26ca96ea86SBastien Nocera #include <linux/delay.h> 27ca96ea86SBastien Nocera #include <linux/irq.h> 28ca96ea86SBastien Nocera #include <linux/interrupt.h> 29ca96ea86SBastien Nocera #include <linux/slab.h> 30771d8f1bSAleksei Mamlin #include <linux/acpi.h> 31771d8f1bSAleksei Mamlin #include <linux/of.h> 32ca96ea86SBastien Nocera #include <asm/unaligned.h> 33ca96ea86SBastien Nocera 34ca96ea86SBastien Nocera struct goodix_ts_data { 35ca96ea86SBastien Nocera struct i2c_client *client; 36ca96ea86SBastien Nocera struct input_dev *input_dev; 37ca96ea86SBastien Nocera int abs_x_max; 38ca96ea86SBastien Nocera int abs_y_max; 39ad48cf5eSKarsten Merker bool swapped_x_y; 40ad48cf5eSKarsten Merker bool inverted_x; 41ad48cf5eSKarsten Merker bool inverted_y; 42ca96ea86SBastien Nocera unsigned int max_touch_num; 43ca96ea86SBastien Nocera unsigned int int_trigger_type; 44a779fbc6SIrina Tirdea int cfg_len; 45ec6e1b40SIrina Tirdea struct gpio_desc *gpiod_int; 46ec6e1b40SIrina Tirdea struct gpio_desc *gpiod_rst; 4768caf858SIrina Tirdea u16 id; 4868caf858SIrina Tirdea u16 version; 4968caf858SIrina Tirdea const char *cfg_name; 5068caf858SIrina Tirdea struct completion firmware_loading_complete; 515ab09d6aSIrina Tirdea unsigned long irq_flags; 52ca96ea86SBastien Nocera }; 53ca96ea86SBastien Nocera 54ec6e1b40SIrina Tirdea #define GOODIX_GPIO_INT_NAME "irq" 55ec6e1b40SIrina Tirdea #define GOODIX_GPIO_RST_NAME "reset" 56ec6e1b40SIrina Tirdea 57ca96ea86SBastien Nocera #define GOODIX_MAX_HEIGHT 4096 58ca96ea86SBastien Nocera #define GOODIX_MAX_WIDTH 4096 59ca96ea86SBastien Nocera #define GOODIX_INT_TRIGGER 1 60ca96ea86SBastien Nocera #define GOODIX_CONTACT_SIZE 8 61ca96ea86SBastien Nocera #define GOODIX_MAX_CONTACTS 10 62ca96ea86SBastien Nocera 63ca96ea86SBastien Nocera #define GOODIX_CONFIG_MAX_LENGTH 240 64a779fbc6SIrina Tirdea #define GOODIX_CONFIG_911_LENGTH 186 65a779fbc6SIrina Tirdea #define GOODIX_CONFIG_967_LENGTH 228 66ca96ea86SBastien Nocera 67ca96ea86SBastien Nocera /* Register defines */ 685ab09d6aSIrina Tirdea #define GOODIX_REG_COMMAND 0x8040 695ab09d6aSIrina Tirdea #define GOODIX_CMD_SCREEN_OFF 0x05 705ab09d6aSIrina Tirdea 71ca96ea86SBastien Nocera #define GOODIX_READ_COOR_ADDR 0x814E 72ca96ea86SBastien Nocera #define GOODIX_REG_CONFIG_DATA 0x8047 73e70b0307SIrina Tirdea #define GOODIX_REG_ID 0x8140 74ca96ea86SBastien Nocera 759b5db7aaSPaul Cercueil #define GOODIX_BUFFER_STATUS_READY BIT(7) 769b5db7aaSPaul Cercueil #define GOODIX_BUFFER_STATUS_TIMEOUT 20 779b5db7aaSPaul Cercueil 78ca96ea86SBastien Nocera #define RESOLUTION_LOC 1 79a7ac7c95SAleksei Mamlin #define MAX_CONTACTS_LOC 5 80ca96ea86SBastien Nocera #define TRIGGER_LOC 6 81ca96ea86SBastien Nocera 82ca96ea86SBastien Nocera static const unsigned long goodix_irq_flags[] = { 83ca96ea86SBastien Nocera IRQ_TYPE_EDGE_RISING, 84ca96ea86SBastien Nocera IRQ_TYPE_EDGE_FALLING, 85ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_LOW, 86ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_HIGH, 87ca96ea86SBastien Nocera }; 88ca96ea86SBastien Nocera 898b5a359cSBastien Nocera /* 908b5a359cSBastien Nocera * Those tablets have their coordinates origin at the bottom right 918b5a359cSBastien Nocera * of the tablet, as if rotated 180 degrees 928b5a359cSBastien Nocera */ 938b5a359cSBastien Nocera static const struct dmi_system_id rotated_screen[] = { 948b5a359cSBastien Nocera #if defined(CONFIG_DMI) && defined(CONFIG_X86) 958b5a359cSBastien Nocera { 968b5a359cSBastien Nocera .ident = "WinBook TW100", 978b5a359cSBastien Nocera .matches = { 988b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 998b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW100") 1008b5a359cSBastien Nocera } 1018b5a359cSBastien Nocera }, 1028b5a359cSBastien Nocera { 1038b5a359cSBastien Nocera .ident = "WinBook TW700", 1048b5a359cSBastien Nocera .matches = { 1058b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 1068b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW700") 1078b5a359cSBastien Nocera }, 1088b5a359cSBastien Nocera }, 1098b5a359cSBastien Nocera #endif 1108b5a359cSBastien Nocera {} 1118b5a359cSBastien Nocera }; 1128b5a359cSBastien Nocera 113ca96ea86SBastien Nocera /** 114ca96ea86SBastien Nocera * goodix_i2c_read - read data from a register of the i2c slave device. 115ca96ea86SBastien Nocera * 116ca96ea86SBastien Nocera * @client: i2c device. 117ca96ea86SBastien Nocera * @reg: the register to read from. 118ca96ea86SBastien Nocera * @buf: raw write data buffer. 119ca96ea86SBastien Nocera * @len: length of the buffer to write 120ca96ea86SBastien Nocera */ 121ca96ea86SBastien Nocera static int goodix_i2c_read(struct i2c_client *client, 122ca96ea86SBastien Nocera u16 reg, u8 *buf, int len) 123ca96ea86SBastien Nocera { 124ca96ea86SBastien Nocera struct i2c_msg msgs[2]; 125ca96ea86SBastien Nocera u16 wbuf = cpu_to_be16(reg); 126ca96ea86SBastien Nocera int ret; 127ca96ea86SBastien Nocera 128ca96ea86SBastien Nocera msgs[0].flags = 0; 129ca96ea86SBastien Nocera msgs[0].addr = client->addr; 130ca96ea86SBastien Nocera msgs[0].len = 2; 131ca96ea86SBastien Nocera msgs[0].buf = (u8 *)&wbuf; 132ca96ea86SBastien Nocera 133ca96ea86SBastien Nocera msgs[1].flags = I2C_M_RD; 134ca96ea86SBastien Nocera msgs[1].addr = client->addr; 135ca96ea86SBastien Nocera msgs[1].len = len; 136ca96ea86SBastien Nocera msgs[1].buf = buf; 137ca96ea86SBastien Nocera 138ca96ea86SBastien Nocera ret = i2c_transfer(client->adapter, msgs, 2); 139ca96ea86SBastien Nocera return ret < 0 ? ret : (ret != ARRAY_SIZE(msgs) ? -EIO : 0); 140ca96ea86SBastien Nocera } 141ca96ea86SBastien Nocera 14268caf858SIrina Tirdea /** 14368caf858SIrina Tirdea * goodix_i2c_write - write data to a register of the i2c slave device. 14468caf858SIrina Tirdea * 14568caf858SIrina Tirdea * @client: i2c device. 14668caf858SIrina Tirdea * @reg: the register to write to. 14768caf858SIrina Tirdea * @buf: raw data buffer to write. 14868caf858SIrina Tirdea * @len: length of the buffer to write 14968caf858SIrina Tirdea */ 15068caf858SIrina Tirdea static int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf, 15168caf858SIrina Tirdea unsigned len) 15268caf858SIrina Tirdea { 15368caf858SIrina Tirdea u8 *addr_buf; 15468caf858SIrina Tirdea struct i2c_msg msg; 15568caf858SIrina Tirdea int ret; 15668caf858SIrina Tirdea 15768caf858SIrina Tirdea addr_buf = kmalloc(len + 2, GFP_KERNEL); 15868caf858SIrina Tirdea if (!addr_buf) 15968caf858SIrina Tirdea return -ENOMEM; 16068caf858SIrina Tirdea 16168caf858SIrina Tirdea addr_buf[0] = reg >> 8; 16268caf858SIrina Tirdea addr_buf[1] = reg & 0xFF; 16368caf858SIrina Tirdea memcpy(&addr_buf[2], buf, len); 16468caf858SIrina Tirdea 16568caf858SIrina Tirdea msg.flags = 0; 16668caf858SIrina Tirdea msg.addr = client->addr; 16768caf858SIrina Tirdea msg.buf = addr_buf; 16868caf858SIrina Tirdea msg.len = len + 2; 16968caf858SIrina Tirdea 17068caf858SIrina Tirdea ret = i2c_transfer(client->adapter, &msg, 1); 17168caf858SIrina Tirdea kfree(addr_buf); 17268caf858SIrina Tirdea return ret < 0 ? ret : (ret != 1 ? -EIO : 0); 17368caf858SIrina Tirdea } 17468caf858SIrina Tirdea 1755ab09d6aSIrina Tirdea static int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value) 1765ab09d6aSIrina Tirdea { 1775ab09d6aSIrina Tirdea return goodix_i2c_write(client, reg, &value, sizeof(value)); 1785ab09d6aSIrina Tirdea } 1795ab09d6aSIrina Tirdea 180a779fbc6SIrina Tirdea static int goodix_get_cfg_len(u16 id) 181a779fbc6SIrina Tirdea { 182a779fbc6SIrina Tirdea switch (id) { 183a779fbc6SIrina Tirdea case 911: 184a779fbc6SIrina Tirdea case 9271: 185a779fbc6SIrina Tirdea case 9110: 186a779fbc6SIrina Tirdea case 927: 187a779fbc6SIrina Tirdea case 928: 188a779fbc6SIrina Tirdea return GOODIX_CONFIG_911_LENGTH; 189a779fbc6SIrina Tirdea 190a779fbc6SIrina Tirdea case 912: 191a779fbc6SIrina Tirdea case 967: 192a779fbc6SIrina Tirdea return GOODIX_CONFIG_967_LENGTH; 193a779fbc6SIrina Tirdea 194a779fbc6SIrina Tirdea default: 195a779fbc6SIrina Tirdea return GOODIX_CONFIG_MAX_LENGTH; 196a779fbc6SIrina Tirdea } 197a779fbc6SIrina Tirdea } 198a779fbc6SIrina Tirdea 199ca96ea86SBastien Nocera static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data) 200ca96ea86SBastien Nocera { 2019b5db7aaSPaul Cercueil unsigned long max_timeout; 202ca96ea86SBastien Nocera int touch_num; 203ca96ea86SBastien Nocera int error; 204ca96ea86SBastien Nocera 2059b5db7aaSPaul Cercueil /* 2069b5db7aaSPaul Cercueil * The 'buffer status' bit, which indicates that the data is valid, is 2079b5db7aaSPaul Cercueil * not set as soon as the interrupt is raised, but slightly after. 2089b5db7aaSPaul Cercueil * This takes around 10 ms to happen, so we poll for 20 ms. 2099b5db7aaSPaul Cercueil */ 2109b5db7aaSPaul Cercueil max_timeout = jiffies + msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT); 2119b5db7aaSPaul Cercueil do { 2129b5db7aaSPaul Cercueil error = goodix_i2c_read(ts->client, GOODIX_READ_COOR_ADDR, 2139b5db7aaSPaul Cercueil data, GOODIX_CONTACT_SIZE + 1); 214ca96ea86SBastien Nocera if (error) { 2159b5db7aaSPaul Cercueil dev_err(&ts->client->dev, "I2C transfer error: %d\n", 2169b5db7aaSPaul Cercueil error); 217ca96ea86SBastien Nocera return error; 218ca96ea86SBastien Nocera } 219ca96ea86SBastien Nocera 2209b5db7aaSPaul Cercueil if (data[0] & GOODIX_BUFFER_STATUS_READY) { 221ca96ea86SBastien Nocera touch_num = data[0] & 0x0f; 222a7ac7c95SAleksei Mamlin if (touch_num > ts->max_touch_num) 223ca96ea86SBastien Nocera return -EPROTO; 224ca96ea86SBastien Nocera 225ca96ea86SBastien Nocera if (touch_num > 1) { 226ca96ea86SBastien Nocera data += 1 + GOODIX_CONTACT_SIZE; 227ca96ea86SBastien Nocera error = goodix_i2c_read(ts->client, 228ca96ea86SBastien Nocera GOODIX_READ_COOR_ADDR + 229ca96ea86SBastien Nocera 1 + GOODIX_CONTACT_SIZE, 230ca96ea86SBastien Nocera data, 2319b5db7aaSPaul Cercueil GOODIX_CONTACT_SIZE * 2329b5db7aaSPaul Cercueil (touch_num - 1)); 233ca96ea86SBastien Nocera if (error) 234ca96ea86SBastien Nocera return error; 235ca96ea86SBastien Nocera } 236ca96ea86SBastien Nocera 237ca96ea86SBastien Nocera return touch_num; 238ca96ea86SBastien Nocera } 239ca96ea86SBastien Nocera 2409b5db7aaSPaul Cercueil usleep_range(1000, 2000); /* Poll every 1 - 2 ms */ 2419b5db7aaSPaul Cercueil } while (time_before(jiffies, max_timeout)); 2429b5db7aaSPaul Cercueil 2439b5db7aaSPaul Cercueil /* 2449b5db7aaSPaul Cercueil * The Goodix panel will send spurious interrupts after a 2459b5db7aaSPaul Cercueil * 'finger up' event, which will always cause a timeout. 2469b5db7aaSPaul Cercueil */ 2479b5db7aaSPaul Cercueil return 0; 2489b5db7aaSPaul Cercueil } 2499b5db7aaSPaul Cercueil 250ca96ea86SBastien Nocera static void goodix_ts_report_touch(struct goodix_ts_data *ts, u8 *coor_data) 251ca96ea86SBastien Nocera { 252ca96ea86SBastien Nocera int id = coor_data[0] & 0x0F; 253ca96ea86SBastien Nocera int input_x = get_unaligned_le16(&coor_data[1]); 254ca96ea86SBastien Nocera int input_y = get_unaligned_le16(&coor_data[3]); 255ca96ea86SBastien Nocera int input_w = get_unaligned_le16(&coor_data[5]); 256ca96ea86SBastien Nocera 257ad48cf5eSKarsten Merker /* Inversions have to happen before axis swapping */ 258ad48cf5eSKarsten Merker if (ts->inverted_x) 259ad48cf5eSKarsten Merker input_x = ts->abs_x_max - input_x; 260ad48cf5eSKarsten Merker if (ts->inverted_y) 261ad48cf5eSKarsten Merker input_y = ts->abs_y_max - input_y; 262ad48cf5eSKarsten Merker if (ts->swapped_x_y) 263ad48cf5eSKarsten Merker swap(input_x, input_y); 264ad48cf5eSKarsten Merker 265ca96ea86SBastien Nocera input_mt_slot(ts->input_dev, id); 266ca96ea86SBastien Nocera input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 267ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_POSITION_X, input_x); 268ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_POSITION_Y, input_y); 269ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 270ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 271ca96ea86SBastien Nocera } 272ca96ea86SBastien Nocera 273ca96ea86SBastien Nocera /** 274ca96ea86SBastien Nocera * goodix_process_events - Process incoming events 275ca96ea86SBastien Nocera * 276ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 277ca96ea86SBastien Nocera * 278ca96ea86SBastien Nocera * Called when the IRQ is triggered. Read the current device state, and push 279ca96ea86SBastien Nocera * the input events to the user space. 280ca96ea86SBastien Nocera */ 281ca96ea86SBastien Nocera static void goodix_process_events(struct goodix_ts_data *ts) 282ca96ea86SBastien Nocera { 2830e0432f0SIrina Tirdea u8 point_data[1 + GOODIX_CONTACT_SIZE * GOODIX_MAX_CONTACTS]; 284ca96ea86SBastien Nocera int touch_num; 285ca96ea86SBastien Nocera int i; 286ca96ea86SBastien Nocera 287ca96ea86SBastien Nocera touch_num = goodix_ts_read_input_report(ts, point_data); 288ca96ea86SBastien Nocera if (touch_num < 0) 289ca96ea86SBastien Nocera return; 290ca96ea86SBastien Nocera 2914a54feeaSSergei A. Trusov /* 2924a54feeaSSergei A. Trusov * Bit 4 of the first byte reports the status of the capacitive 2934a54feeaSSergei A. Trusov * Windows/Home button. 2944a54feeaSSergei A. Trusov */ 2954a54feeaSSergei A. Trusov input_report_key(ts->input_dev, KEY_LEFTMETA, point_data[0] & BIT(4)); 2964a54feeaSSergei A. Trusov 297ca96ea86SBastien Nocera for (i = 0; i < touch_num; i++) 298ca96ea86SBastien Nocera goodix_ts_report_touch(ts, 299ca96ea86SBastien Nocera &point_data[1 + GOODIX_CONTACT_SIZE * i]); 300ca96ea86SBastien Nocera 301ca96ea86SBastien Nocera input_mt_sync_frame(ts->input_dev); 302ca96ea86SBastien Nocera input_sync(ts->input_dev); 303ca96ea86SBastien Nocera } 304ca96ea86SBastien Nocera 305ca96ea86SBastien Nocera /** 306ca96ea86SBastien Nocera * goodix_ts_irq_handler - The IRQ handler 307ca96ea86SBastien Nocera * 308ca96ea86SBastien Nocera * @irq: interrupt number. 309ca96ea86SBastien Nocera * @dev_id: private data pointer. 310ca96ea86SBastien Nocera */ 311ca96ea86SBastien Nocera static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id) 312ca96ea86SBastien Nocera { 313ca96ea86SBastien Nocera struct goodix_ts_data *ts = dev_id; 314ca96ea86SBastien Nocera 315ca96ea86SBastien Nocera goodix_process_events(ts); 316ca96ea86SBastien Nocera 3175d655b35SIrina Tirdea if (goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0) < 0) 318ca96ea86SBastien Nocera dev_err(&ts->client->dev, "I2C write end_cmd error\n"); 319ca96ea86SBastien Nocera 320ca96ea86SBastien Nocera return IRQ_HANDLED; 321ca96ea86SBastien Nocera } 322ca96ea86SBastien Nocera 3235ab09d6aSIrina Tirdea static void goodix_free_irq(struct goodix_ts_data *ts) 3245ab09d6aSIrina Tirdea { 3255ab09d6aSIrina Tirdea devm_free_irq(&ts->client->dev, ts->client->irq, ts); 3265ab09d6aSIrina Tirdea } 3275ab09d6aSIrina Tirdea 3285ab09d6aSIrina Tirdea static int goodix_request_irq(struct goodix_ts_data *ts) 3295ab09d6aSIrina Tirdea { 3305ab09d6aSIrina Tirdea return devm_request_threaded_irq(&ts->client->dev, ts->client->irq, 3315ab09d6aSIrina Tirdea NULL, goodix_ts_irq_handler, 3325ab09d6aSIrina Tirdea ts->irq_flags, ts->client->name, ts); 3335ab09d6aSIrina Tirdea } 3345ab09d6aSIrina Tirdea 33568caf858SIrina Tirdea /** 33668caf858SIrina Tirdea * goodix_check_cfg - Checks if config fw is valid 33768caf858SIrina Tirdea * 33868caf858SIrina Tirdea * @ts: goodix_ts_data pointer 33968caf858SIrina Tirdea * @cfg: firmware config data 34068caf858SIrina Tirdea */ 34168caf858SIrina Tirdea static int goodix_check_cfg(struct goodix_ts_data *ts, 34268caf858SIrina Tirdea const struct firmware *cfg) 34368caf858SIrina Tirdea { 34468caf858SIrina Tirdea int i, raw_cfg_len; 34568caf858SIrina Tirdea u8 check_sum = 0; 34668caf858SIrina Tirdea 34768caf858SIrina Tirdea if (cfg->size > GOODIX_CONFIG_MAX_LENGTH) { 34868caf858SIrina Tirdea dev_err(&ts->client->dev, 34968caf858SIrina Tirdea "The length of the config fw is not correct"); 35068caf858SIrina Tirdea return -EINVAL; 35168caf858SIrina Tirdea } 35268caf858SIrina Tirdea 35368caf858SIrina Tirdea raw_cfg_len = cfg->size - 2; 35468caf858SIrina Tirdea for (i = 0; i < raw_cfg_len; i++) 35568caf858SIrina Tirdea check_sum += cfg->data[i]; 35668caf858SIrina Tirdea check_sum = (~check_sum) + 1; 35768caf858SIrina Tirdea if (check_sum != cfg->data[raw_cfg_len]) { 35868caf858SIrina Tirdea dev_err(&ts->client->dev, 35968caf858SIrina Tirdea "The checksum of the config fw is not correct"); 36068caf858SIrina Tirdea return -EINVAL; 36168caf858SIrina Tirdea } 36268caf858SIrina Tirdea 36368caf858SIrina Tirdea if (cfg->data[raw_cfg_len + 1] != 1) { 36468caf858SIrina Tirdea dev_err(&ts->client->dev, 36568caf858SIrina Tirdea "Config fw must have Config_Fresh register set"); 36668caf858SIrina Tirdea return -EINVAL; 36768caf858SIrina Tirdea } 36868caf858SIrina Tirdea 36968caf858SIrina Tirdea return 0; 37068caf858SIrina Tirdea } 37168caf858SIrina Tirdea 37268caf858SIrina Tirdea /** 37368caf858SIrina Tirdea * goodix_send_cfg - Write fw config to device 37468caf858SIrina Tirdea * 37568caf858SIrina Tirdea * @ts: goodix_ts_data pointer 37668caf858SIrina Tirdea * @cfg: config firmware to write to device 37768caf858SIrina Tirdea */ 37868caf858SIrina Tirdea static int goodix_send_cfg(struct goodix_ts_data *ts, 37968caf858SIrina Tirdea const struct firmware *cfg) 38068caf858SIrina Tirdea { 38168caf858SIrina Tirdea int error; 38268caf858SIrina Tirdea 38368caf858SIrina Tirdea error = goodix_check_cfg(ts, cfg); 38468caf858SIrina Tirdea if (error) 38568caf858SIrina Tirdea return error; 38668caf858SIrina Tirdea 38768caf858SIrina Tirdea error = goodix_i2c_write(ts->client, GOODIX_REG_CONFIG_DATA, cfg->data, 38868caf858SIrina Tirdea cfg->size); 38968caf858SIrina Tirdea if (error) { 39068caf858SIrina Tirdea dev_err(&ts->client->dev, "Failed to write config data: %d", 39168caf858SIrina Tirdea error); 39268caf858SIrina Tirdea return error; 39368caf858SIrina Tirdea } 39468caf858SIrina Tirdea dev_dbg(&ts->client->dev, "Config sent successfully."); 39568caf858SIrina Tirdea 39668caf858SIrina Tirdea /* Let the firmware reconfigure itself, so sleep for 10ms */ 39768caf858SIrina Tirdea usleep_range(10000, 11000); 39868caf858SIrina Tirdea 39968caf858SIrina Tirdea return 0; 40068caf858SIrina Tirdea } 40168caf858SIrina Tirdea 402ec6e1b40SIrina Tirdea static int goodix_int_sync(struct goodix_ts_data *ts) 403ec6e1b40SIrina Tirdea { 404ec6e1b40SIrina Tirdea int error; 405ec6e1b40SIrina Tirdea 406ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, 0); 407ec6e1b40SIrina Tirdea if (error) 408ec6e1b40SIrina Tirdea return error; 409ec6e1b40SIrina Tirdea 410ec6e1b40SIrina Tirdea msleep(50); /* T5: 50ms */ 411ec6e1b40SIrina Tirdea 412ec6e1b40SIrina Tirdea error = gpiod_direction_input(ts->gpiod_int); 413ec6e1b40SIrina Tirdea if (error) 414ec6e1b40SIrina Tirdea return error; 415ec6e1b40SIrina Tirdea 416ec6e1b40SIrina Tirdea return 0; 417ec6e1b40SIrina Tirdea } 418ec6e1b40SIrina Tirdea 419ec6e1b40SIrina Tirdea /** 420ec6e1b40SIrina Tirdea * goodix_reset - Reset device during power on 421ec6e1b40SIrina Tirdea * 422ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 423ec6e1b40SIrina Tirdea */ 424ec6e1b40SIrina Tirdea static int goodix_reset(struct goodix_ts_data *ts) 425ec6e1b40SIrina Tirdea { 426ec6e1b40SIrina Tirdea int error; 427ec6e1b40SIrina Tirdea 428ec6e1b40SIrina Tirdea /* begin select I2C slave addr */ 429ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 0); 430ec6e1b40SIrina Tirdea if (error) 431ec6e1b40SIrina Tirdea return error; 432ec6e1b40SIrina Tirdea 433ec6e1b40SIrina Tirdea msleep(20); /* T2: > 10ms */ 434ec6e1b40SIrina Tirdea 435ec6e1b40SIrina Tirdea /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */ 436ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, ts->client->addr == 0x14); 437ec6e1b40SIrina Tirdea if (error) 438ec6e1b40SIrina Tirdea return error; 439ec6e1b40SIrina Tirdea 440ec6e1b40SIrina Tirdea usleep_range(100, 2000); /* T3: > 100us */ 441ec6e1b40SIrina Tirdea 442ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 1); 443ec6e1b40SIrina Tirdea if (error) 444ec6e1b40SIrina Tirdea return error; 445ec6e1b40SIrina Tirdea 446ec6e1b40SIrina Tirdea usleep_range(6000, 10000); /* T4: > 5ms */ 447ec6e1b40SIrina Tirdea 448ec6e1b40SIrina Tirdea /* end select I2C slave addr */ 449ec6e1b40SIrina Tirdea error = gpiod_direction_input(ts->gpiod_rst); 450ec6e1b40SIrina Tirdea if (error) 451ec6e1b40SIrina Tirdea return error; 452ec6e1b40SIrina Tirdea 453ec6e1b40SIrina Tirdea error = goodix_int_sync(ts); 454ec6e1b40SIrina Tirdea if (error) 455ec6e1b40SIrina Tirdea return error; 456ec6e1b40SIrina Tirdea 457ec6e1b40SIrina Tirdea return 0; 458ec6e1b40SIrina Tirdea } 459ec6e1b40SIrina Tirdea 460ec6e1b40SIrina Tirdea /** 461ec6e1b40SIrina Tirdea * goodix_get_gpio_config - Get GPIO config from ACPI/DT 462ec6e1b40SIrina Tirdea * 463ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 464ec6e1b40SIrina Tirdea */ 465ec6e1b40SIrina Tirdea static int goodix_get_gpio_config(struct goodix_ts_data *ts) 466ec6e1b40SIrina Tirdea { 467ec6e1b40SIrina Tirdea int error; 468ec6e1b40SIrina Tirdea struct device *dev; 469ec6e1b40SIrina Tirdea struct gpio_desc *gpiod; 470ec6e1b40SIrina Tirdea 471ec6e1b40SIrina Tirdea if (!ts->client) 472ec6e1b40SIrina Tirdea return -EINVAL; 473ec6e1b40SIrina Tirdea dev = &ts->client->dev; 474ec6e1b40SIrina Tirdea 475ec6e1b40SIrina Tirdea /* Get the interrupt GPIO pin number */ 476ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN); 477ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 478ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 479ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 480ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 481ec6e1b40SIrina Tirdea GOODIX_GPIO_INT_NAME, error); 482ec6e1b40SIrina Tirdea return error; 483ec6e1b40SIrina Tirdea } 484ec6e1b40SIrina Tirdea 485ec6e1b40SIrina Tirdea ts->gpiod_int = gpiod; 486ec6e1b40SIrina Tirdea 487ec6e1b40SIrina Tirdea /* Get the reset line GPIO pin number */ 488ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, GPIOD_IN); 489ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 490ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 491ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 492ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 493ec6e1b40SIrina Tirdea GOODIX_GPIO_RST_NAME, error); 494ec6e1b40SIrina Tirdea return error; 495ec6e1b40SIrina Tirdea } 496ec6e1b40SIrina Tirdea 497ec6e1b40SIrina Tirdea ts->gpiod_rst = gpiod; 498ec6e1b40SIrina Tirdea 499ec6e1b40SIrina Tirdea return 0; 500ec6e1b40SIrina Tirdea } 501ec6e1b40SIrina Tirdea 502ca96ea86SBastien Nocera /** 503ca96ea86SBastien Nocera * goodix_read_config - Read the embedded configuration of the panel 504ca96ea86SBastien Nocera * 505ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 506ca96ea86SBastien Nocera * 507ca96ea86SBastien Nocera * Must be called during probe 508ca96ea86SBastien Nocera */ 509ca96ea86SBastien Nocera static void goodix_read_config(struct goodix_ts_data *ts) 510ca96ea86SBastien Nocera { 511ca96ea86SBastien Nocera u8 config[GOODIX_CONFIG_MAX_LENGTH]; 512ca96ea86SBastien Nocera int error; 513ca96ea86SBastien Nocera 514ca96ea86SBastien Nocera error = goodix_i2c_read(ts->client, GOODIX_REG_CONFIG_DATA, 515a779fbc6SIrina Tirdea config, ts->cfg_len); 516ca96ea86SBastien Nocera if (error) { 517ca96ea86SBastien Nocera dev_warn(&ts->client->dev, 518ca96ea86SBastien Nocera "Error reading config (%d), using defaults\n", 519ca96ea86SBastien Nocera error); 520ca96ea86SBastien Nocera ts->abs_x_max = GOODIX_MAX_WIDTH; 521ca96ea86SBastien Nocera ts->abs_y_max = GOODIX_MAX_HEIGHT; 522ad48cf5eSKarsten Merker if (ts->swapped_x_y) 523ad48cf5eSKarsten Merker swap(ts->abs_x_max, ts->abs_y_max); 524ca96ea86SBastien Nocera ts->int_trigger_type = GOODIX_INT_TRIGGER; 525a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 526ca96ea86SBastien Nocera return; 527ca96ea86SBastien Nocera } 528ca96ea86SBastien Nocera 529ca96ea86SBastien Nocera ts->abs_x_max = get_unaligned_le16(&config[RESOLUTION_LOC]); 530ca96ea86SBastien Nocera ts->abs_y_max = get_unaligned_le16(&config[RESOLUTION_LOC + 2]); 531ad48cf5eSKarsten Merker if (ts->swapped_x_y) 532ad48cf5eSKarsten Merker swap(ts->abs_x_max, ts->abs_y_max); 533a7ac7c95SAleksei Mamlin ts->int_trigger_type = config[TRIGGER_LOC] & 0x03; 534a7ac7c95SAleksei Mamlin ts->max_touch_num = config[MAX_CONTACTS_LOC] & 0x0f; 535a7ac7c95SAleksei Mamlin if (!ts->abs_x_max || !ts->abs_y_max || !ts->max_touch_num) { 536ca96ea86SBastien Nocera dev_err(&ts->client->dev, 537ca96ea86SBastien Nocera "Invalid config, using defaults\n"); 538ca96ea86SBastien Nocera ts->abs_x_max = GOODIX_MAX_WIDTH; 539ca96ea86SBastien Nocera ts->abs_y_max = GOODIX_MAX_HEIGHT; 540ad48cf5eSKarsten Merker if (ts->swapped_x_y) 541ad48cf5eSKarsten Merker swap(ts->abs_x_max, ts->abs_y_max); 542a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 543ca96ea86SBastien Nocera } 5448b5a359cSBastien Nocera 54557c80e8eSKarsten Merker if (dmi_check_system(rotated_screen)) { 54657c80e8eSKarsten Merker ts->inverted_x = true; 54757c80e8eSKarsten Merker ts->inverted_y = true; 5488b5a359cSBastien Nocera dev_dbg(&ts->client->dev, 5498b5a359cSBastien Nocera "Applying '180 degrees rotated screen' quirk\n"); 550ca96ea86SBastien Nocera } 55157c80e8eSKarsten Merker } 552ca96ea86SBastien Nocera 553ca96ea86SBastien Nocera /** 554ca96ea86SBastien Nocera * goodix_read_version - Read goodix touchscreen version 555ca96ea86SBastien Nocera * 55668caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 557ca96ea86SBastien Nocera */ 55868caf858SIrina Tirdea static int goodix_read_version(struct goodix_ts_data *ts) 559ca96ea86SBastien Nocera { 560ca96ea86SBastien Nocera int error; 561ca96ea86SBastien Nocera u8 buf[6]; 562e70b0307SIrina Tirdea char id_str[5]; 563ca96ea86SBastien Nocera 56468caf858SIrina Tirdea error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf)); 565ca96ea86SBastien Nocera if (error) { 56668caf858SIrina Tirdea dev_err(&ts->client->dev, "read version failed: %d\n", error); 567ca96ea86SBastien Nocera return error; 568ca96ea86SBastien Nocera } 569ca96ea86SBastien Nocera 570e70b0307SIrina Tirdea memcpy(id_str, buf, 4); 571e70b0307SIrina Tirdea id_str[4] = 0; 57268caf858SIrina Tirdea if (kstrtou16(id_str, 10, &ts->id)) 57368caf858SIrina Tirdea ts->id = 0x1001; 574e70b0307SIrina Tirdea 57568caf858SIrina Tirdea ts->version = get_unaligned_le16(&buf[4]); 576ca96ea86SBastien Nocera 57768caf858SIrina Tirdea dev_info(&ts->client->dev, "ID %d, version: %04x\n", ts->id, 57868caf858SIrina Tirdea ts->version); 579ca96ea86SBastien Nocera 580ca96ea86SBastien Nocera return 0; 581ca96ea86SBastien Nocera } 582ca96ea86SBastien Nocera 583ca96ea86SBastien Nocera /** 584ca96ea86SBastien Nocera * goodix_i2c_test - I2C test function to check if the device answers. 585ca96ea86SBastien Nocera * 586ca96ea86SBastien Nocera * @client: the i2c client 587ca96ea86SBastien Nocera */ 588ca96ea86SBastien Nocera static int goodix_i2c_test(struct i2c_client *client) 589ca96ea86SBastien Nocera { 590ca96ea86SBastien Nocera int retry = 0; 591ca96ea86SBastien Nocera int error; 592ca96ea86SBastien Nocera u8 test; 593ca96ea86SBastien Nocera 594ca96ea86SBastien Nocera while (retry++ < 2) { 595ca96ea86SBastien Nocera error = goodix_i2c_read(client, GOODIX_REG_CONFIG_DATA, 596ca96ea86SBastien Nocera &test, 1); 597ca96ea86SBastien Nocera if (!error) 598ca96ea86SBastien Nocera return 0; 599ca96ea86SBastien Nocera 600ca96ea86SBastien Nocera dev_err(&client->dev, "i2c test failed attempt %d: %d\n", 601ca96ea86SBastien Nocera retry, error); 602ca96ea86SBastien Nocera msleep(20); 603ca96ea86SBastien Nocera } 604ca96ea86SBastien Nocera 605ca96ea86SBastien Nocera return error; 606ca96ea86SBastien Nocera } 607ca96ea86SBastien Nocera 608ca96ea86SBastien Nocera /** 609ca96ea86SBastien Nocera * goodix_request_input_dev - Allocate, populate and register the input device 610ca96ea86SBastien Nocera * 611ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 612ca96ea86SBastien Nocera * 613ca96ea86SBastien Nocera * Must be called during probe 614ca96ea86SBastien Nocera */ 61568caf858SIrina Tirdea static int goodix_request_input_dev(struct goodix_ts_data *ts) 616ca96ea86SBastien Nocera { 617ca96ea86SBastien Nocera int error; 618ca96ea86SBastien Nocera 619ca96ea86SBastien Nocera ts->input_dev = devm_input_allocate_device(&ts->client->dev); 620ca96ea86SBastien Nocera if (!ts->input_dev) { 621ca96ea86SBastien Nocera dev_err(&ts->client->dev, "Failed to allocate input device."); 622ca96ea86SBastien Nocera return -ENOMEM; 623ca96ea86SBastien Nocera } 624ca96ea86SBastien Nocera 6250dfb35bdSIrina Tirdea input_set_abs_params(ts->input_dev, ABS_MT_POSITION_X, 6260dfb35bdSIrina Tirdea 0, ts->abs_x_max, 0, 0); 6270dfb35bdSIrina Tirdea input_set_abs_params(ts->input_dev, ABS_MT_POSITION_Y, 6280dfb35bdSIrina Tirdea 0, ts->abs_y_max, 0, 0); 629ca96ea86SBastien Nocera input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 630ca96ea86SBastien Nocera input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 631ca96ea86SBastien Nocera 632a7ac7c95SAleksei Mamlin input_mt_init_slots(ts->input_dev, ts->max_touch_num, 633ca96ea86SBastien Nocera INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); 634ca96ea86SBastien Nocera 635ca96ea86SBastien Nocera ts->input_dev->name = "Goodix Capacitive TouchScreen"; 636ca96ea86SBastien Nocera ts->input_dev->phys = "input/ts"; 637ca96ea86SBastien Nocera ts->input_dev->id.bustype = BUS_I2C; 638ca96ea86SBastien Nocera ts->input_dev->id.vendor = 0x0416; 63968caf858SIrina Tirdea ts->input_dev->id.product = ts->id; 64068caf858SIrina Tirdea ts->input_dev->id.version = ts->version; 641ca96ea86SBastien Nocera 6424a54feeaSSergei A. Trusov /* Capacitive Windows/Home button on some devices */ 6434a54feeaSSergei A. Trusov input_set_capability(ts->input_dev, EV_KEY, KEY_LEFTMETA); 6444a54feeaSSergei A. Trusov 645ca96ea86SBastien Nocera error = input_register_device(ts->input_dev); 646ca96ea86SBastien Nocera if (error) { 647ca96ea86SBastien Nocera dev_err(&ts->client->dev, 648ca96ea86SBastien Nocera "Failed to register input device: %d", error); 649ca96ea86SBastien Nocera return error; 650ca96ea86SBastien Nocera } 651ca96ea86SBastien Nocera 652ca96ea86SBastien Nocera return 0; 653ca96ea86SBastien Nocera } 654ca96ea86SBastien Nocera 65568caf858SIrina Tirdea /** 65668caf858SIrina Tirdea * goodix_configure_dev - Finish device initialization 65768caf858SIrina Tirdea * 65868caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 65968caf858SIrina Tirdea * 66068caf858SIrina Tirdea * Must be called from probe to finish initialization of the device. 66168caf858SIrina Tirdea * Contains the common initialization code for both devices that 66268caf858SIrina Tirdea * declare gpio pins and devices that do not. It is either called 66368caf858SIrina Tirdea * directly from probe or from request_firmware_wait callback. 66468caf858SIrina Tirdea */ 66568caf858SIrina Tirdea static int goodix_configure_dev(struct goodix_ts_data *ts) 66668caf858SIrina Tirdea { 66768caf858SIrina Tirdea int error; 66868caf858SIrina Tirdea 669ad48cf5eSKarsten Merker ts->swapped_x_y = device_property_read_bool(&ts->client->dev, 670ad48cf5eSKarsten Merker "touchscreen-swapped-x-y"); 671ad48cf5eSKarsten Merker ts->inverted_x = device_property_read_bool(&ts->client->dev, 672ad48cf5eSKarsten Merker "touchscreen-inverted-x"); 673ad48cf5eSKarsten Merker ts->inverted_y = device_property_read_bool(&ts->client->dev, 674ad48cf5eSKarsten Merker "touchscreen-inverted-y"); 675ad48cf5eSKarsten Merker 67668caf858SIrina Tirdea goodix_read_config(ts); 67768caf858SIrina Tirdea 67868caf858SIrina Tirdea error = goodix_request_input_dev(ts); 67968caf858SIrina Tirdea if (error) 68068caf858SIrina Tirdea return error; 68168caf858SIrina Tirdea 6825ab09d6aSIrina Tirdea ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT; 6835ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 68468caf858SIrina Tirdea if (error) { 68568caf858SIrina Tirdea dev_err(&ts->client->dev, "request IRQ failed: %d\n", error); 68668caf858SIrina Tirdea return error; 68768caf858SIrina Tirdea } 68868caf858SIrina Tirdea 68968caf858SIrina Tirdea return 0; 69068caf858SIrina Tirdea } 69168caf858SIrina Tirdea 69268caf858SIrina Tirdea /** 69368caf858SIrina Tirdea * goodix_config_cb - Callback to finish device init 69468caf858SIrina Tirdea * 69568caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 69668caf858SIrina Tirdea * 69768caf858SIrina Tirdea * request_firmware_wait callback that finishes 69868caf858SIrina Tirdea * initialization of the device. 69968caf858SIrina Tirdea */ 70068caf858SIrina Tirdea static void goodix_config_cb(const struct firmware *cfg, void *ctx) 70168caf858SIrina Tirdea { 70268caf858SIrina Tirdea struct goodix_ts_data *ts = ctx; 70368caf858SIrina Tirdea int error; 70468caf858SIrina Tirdea 70568caf858SIrina Tirdea if (cfg) { 70668caf858SIrina Tirdea /* send device configuration to the firmware */ 70768caf858SIrina Tirdea error = goodix_send_cfg(ts, cfg); 70868caf858SIrina Tirdea if (error) 70968caf858SIrina Tirdea goto err_release_cfg; 71068caf858SIrina Tirdea } 71168caf858SIrina Tirdea 71268caf858SIrina Tirdea goodix_configure_dev(ts); 71368caf858SIrina Tirdea 71468caf858SIrina Tirdea err_release_cfg: 71568caf858SIrina Tirdea release_firmware(cfg); 71668caf858SIrina Tirdea complete_all(&ts->firmware_loading_complete); 71768caf858SIrina Tirdea } 71868caf858SIrina Tirdea 719ca96ea86SBastien Nocera static int goodix_ts_probe(struct i2c_client *client, 720ca96ea86SBastien Nocera const struct i2c_device_id *id) 721ca96ea86SBastien Nocera { 722ca96ea86SBastien Nocera struct goodix_ts_data *ts; 723ca96ea86SBastien Nocera int error; 724ca96ea86SBastien Nocera 725ca96ea86SBastien Nocera dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr); 726ca96ea86SBastien Nocera 727ca96ea86SBastien Nocera if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 728ca96ea86SBastien Nocera dev_err(&client->dev, "I2C check functionality failed.\n"); 729ca96ea86SBastien Nocera return -ENXIO; 730ca96ea86SBastien Nocera } 731ca96ea86SBastien Nocera 732ca96ea86SBastien Nocera ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); 733ca96ea86SBastien Nocera if (!ts) 734ca96ea86SBastien Nocera return -ENOMEM; 735ca96ea86SBastien Nocera 736ca96ea86SBastien Nocera ts->client = client; 737ca96ea86SBastien Nocera i2c_set_clientdata(client, ts); 73868caf858SIrina Tirdea init_completion(&ts->firmware_loading_complete); 739ca96ea86SBastien Nocera 740ec6e1b40SIrina Tirdea error = goodix_get_gpio_config(ts); 741ec6e1b40SIrina Tirdea if (error) 742ec6e1b40SIrina Tirdea return error; 743ec6e1b40SIrina Tirdea 744ec6e1b40SIrina Tirdea if (ts->gpiod_int && ts->gpiod_rst) { 745ec6e1b40SIrina Tirdea /* reset the controller */ 746ec6e1b40SIrina Tirdea error = goodix_reset(ts); 747ec6e1b40SIrina Tirdea if (error) { 748ec6e1b40SIrina Tirdea dev_err(&client->dev, "Controller reset failed.\n"); 749ec6e1b40SIrina Tirdea return error; 750ec6e1b40SIrina Tirdea } 751ec6e1b40SIrina Tirdea } 752ec6e1b40SIrina Tirdea 753ca96ea86SBastien Nocera error = goodix_i2c_test(client); 754ca96ea86SBastien Nocera if (error) { 755ca96ea86SBastien Nocera dev_err(&client->dev, "I2C communication failure: %d\n", error); 756ca96ea86SBastien Nocera return error; 757ca96ea86SBastien Nocera } 758ca96ea86SBastien Nocera 75968caf858SIrina Tirdea error = goodix_read_version(ts); 760ca96ea86SBastien Nocera if (error) { 761ca96ea86SBastien Nocera dev_err(&client->dev, "Read version failed.\n"); 762ca96ea86SBastien Nocera return error; 763ca96ea86SBastien Nocera } 764ca96ea86SBastien Nocera 76568caf858SIrina Tirdea ts->cfg_len = goodix_get_cfg_len(ts->id); 766a779fbc6SIrina Tirdea 76768caf858SIrina Tirdea if (ts->gpiod_int && ts->gpiod_rst) { 76868caf858SIrina Tirdea /* update device config */ 76968caf858SIrina Tirdea ts->cfg_name = devm_kasprintf(&client->dev, GFP_KERNEL, 77068caf858SIrina Tirdea "goodix_%d_cfg.bin", ts->id); 77168caf858SIrina Tirdea if (!ts->cfg_name) 77268caf858SIrina Tirdea return -ENOMEM; 773ca96ea86SBastien Nocera 77468caf858SIrina Tirdea error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name, 77568caf858SIrina Tirdea &client->dev, GFP_KERNEL, ts, 77668caf858SIrina Tirdea goodix_config_cb); 777ca96ea86SBastien Nocera if (error) { 77868caf858SIrina Tirdea dev_err(&client->dev, 77968caf858SIrina Tirdea "Failed to invoke firmware loader: %d\n", 78068caf858SIrina Tirdea error); 781ca96ea86SBastien Nocera return error; 782ca96ea86SBastien Nocera } 783ca96ea86SBastien Nocera 784ca96ea86SBastien Nocera return 0; 78568caf858SIrina Tirdea } else { 78668caf858SIrina Tirdea error = goodix_configure_dev(ts); 78768caf858SIrina Tirdea if (error) 78868caf858SIrina Tirdea return error; 78968caf858SIrina Tirdea } 79068caf858SIrina Tirdea 79168caf858SIrina Tirdea return 0; 79268caf858SIrina Tirdea } 79368caf858SIrina Tirdea 79468caf858SIrina Tirdea static int goodix_ts_remove(struct i2c_client *client) 79568caf858SIrina Tirdea { 79668caf858SIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 79768caf858SIrina Tirdea 79868caf858SIrina Tirdea if (ts->gpiod_int && ts->gpiod_rst) 79968caf858SIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 80068caf858SIrina Tirdea 80168caf858SIrina Tirdea return 0; 802ca96ea86SBastien Nocera } 803ca96ea86SBastien Nocera 8045ab09d6aSIrina Tirdea static int __maybe_unused goodix_suspend(struct device *dev) 8055ab09d6aSIrina Tirdea { 8065ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 8075ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 8085ab09d6aSIrina Tirdea int error; 8095ab09d6aSIrina Tirdea 8105ab09d6aSIrina Tirdea /* We need gpio pins to suspend/resume */ 8115ab09d6aSIrina Tirdea if (!ts->gpiod_int || !ts->gpiod_rst) 8125ab09d6aSIrina Tirdea return 0; 8135ab09d6aSIrina Tirdea 8145ab09d6aSIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 8155ab09d6aSIrina Tirdea 8165ab09d6aSIrina Tirdea /* Free IRQ as IRQ pin is used as output in the suspend sequence */ 8175ab09d6aSIrina Tirdea goodix_free_irq(ts); 8185ab09d6aSIrina Tirdea 8195ab09d6aSIrina Tirdea /* Output LOW on the INT pin for 5 ms */ 8205ab09d6aSIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, 0); 8215ab09d6aSIrina Tirdea if (error) { 8225ab09d6aSIrina Tirdea goodix_request_irq(ts); 8235ab09d6aSIrina Tirdea return error; 8245ab09d6aSIrina Tirdea } 8255ab09d6aSIrina Tirdea 8265ab09d6aSIrina Tirdea usleep_range(5000, 6000); 8275ab09d6aSIrina Tirdea 8285ab09d6aSIrina Tirdea error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND, 8295ab09d6aSIrina Tirdea GOODIX_CMD_SCREEN_OFF); 8305ab09d6aSIrina Tirdea if (error) { 8315ab09d6aSIrina Tirdea dev_err(&ts->client->dev, "Screen off command failed\n"); 8325ab09d6aSIrina Tirdea gpiod_direction_input(ts->gpiod_int); 8335ab09d6aSIrina Tirdea goodix_request_irq(ts); 8345ab09d6aSIrina Tirdea return -EAGAIN; 8355ab09d6aSIrina Tirdea } 8365ab09d6aSIrina Tirdea 8375ab09d6aSIrina Tirdea /* 8385ab09d6aSIrina Tirdea * The datasheet specifies that the interval between sending screen-off 8395ab09d6aSIrina Tirdea * command and wake-up should be longer than 58 ms. To avoid waking up 8405ab09d6aSIrina Tirdea * sooner, delay 58ms here. 8415ab09d6aSIrina Tirdea */ 8425ab09d6aSIrina Tirdea msleep(58); 8435ab09d6aSIrina Tirdea return 0; 8445ab09d6aSIrina Tirdea } 8455ab09d6aSIrina Tirdea 8465ab09d6aSIrina Tirdea static int __maybe_unused goodix_resume(struct device *dev) 8475ab09d6aSIrina Tirdea { 8485ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 8495ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 8505ab09d6aSIrina Tirdea int error; 8515ab09d6aSIrina Tirdea 8525ab09d6aSIrina Tirdea if (!ts->gpiod_int || !ts->gpiod_rst) 8535ab09d6aSIrina Tirdea return 0; 8545ab09d6aSIrina Tirdea 8555ab09d6aSIrina Tirdea /* 8565ab09d6aSIrina Tirdea * Exit sleep mode by outputting HIGH level to INT pin 8575ab09d6aSIrina Tirdea * for 2ms~5ms. 8585ab09d6aSIrina Tirdea */ 8595ab09d6aSIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, 1); 8605ab09d6aSIrina Tirdea if (error) 8615ab09d6aSIrina Tirdea return error; 8625ab09d6aSIrina Tirdea 8635ab09d6aSIrina Tirdea usleep_range(2000, 5000); 8645ab09d6aSIrina Tirdea 8655ab09d6aSIrina Tirdea error = goodix_int_sync(ts); 8665ab09d6aSIrina Tirdea if (error) 8675ab09d6aSIrina Tirdea return error; 8685ab09d6aSIrina Tirdea 8695ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 8705ab09d6aSIrina Tirdea if (error) 8715ab09d6aSIrina Tirdea return error; 8725ab09d6aSIrina Tirdea 8735ab09d6aSIrina Tirdea return 0; 8745ab09d6aSIrina Tirdea } 8755ab09d6aSIrina Tirdea 8765ab09d6aSIrina Tirdea static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume); 8775ab09d6aSIrina Tirdea 878ca96ea86SBastien Nocera static const struct i2c_device_id goodix_ts_id[] = { 879ca96ea86SBastien Nocera { "GDIX1001:00", 0 }, 880ca96ea86SBastien Nocera { } 881ca96ea86SBastien Nocera }; 8822e9e910eSJavier Martinez Canillas MODULE_DEVICE_TABLE(i2c, goodix_ts_id); 883ca96ea86SBastien Nocera 884771d8f1bSAleksei Mamlin #ifdef CONFIG_ACPI 885ca96ea86SBastien Nocera static const struct acpi_device_id goodix_acpi_match[] = { 886ca96ea86SBastien Nocera { "GDIX1001", 0 }, 887ca96ea86SBastien Nocera { } 888ca96ea86SBastien Nocera }; 889ca96ea86SBastien Nocera MODULE_DEVICE_TABLE(acpi, goodix_acpi_match); 890771d8f1bSAleksei Mamlin #endif 891771d8f1bSAleksei Mamlin 892771d8f1bSAleksei Mamlin #ifdef CONFIG_OF 893771d8f1bSAleksei Mamlin static const struct of_device_id goodix_of_match[] = { 894771d8f1bSAleksei Mamlin { .compatible = "goodix,gt911" }, 895771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9110" }, 896771d8f1bSAleksei Mamlin { .compatible = "goodix,gt912" }, 897771d8f1bSAleksei Mamlin { .compatible = "goodix,gt927" }, 898771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9271" }, 899771d8f1bSAleksei Mamlin { .compatible = "goodix,gt928" }, 900771d8f1bSAleksei Mamlin { .compatible = "goodix,gt967" }, 901771d8f1bSAleksei Mamlin { } 902771d8f1bSAleksei Mamlin }; 903771d8f1bSAleksei Mamlin MODULE_DEVICE_TABLE(of, goodix_of_match); 904771d8f1bSAleksei Mamlin #endif 905ca96ea86SBastien Nocera 906ca96ea86SBastien Nocera static struct i2c_driver goodix_ts_driver = { 907ca96ea86SBastien Nocera .probe = goodix_ts_probe, 90868caf858SIrina Tirdea .remove = goodix_ts_remove, 909ca96ea86SBastien Nocera .id_table = goodix_ts_id, 910ca96ea86SBastien Nocera .driver = { 911ca96ea86SBastien Nocera .name = "Goodix-TS", 912771d8f1bSAleksei Mamlin .acpi_match_table = ACPI_PTR(goodix_acpi_match), 913771d8f1bSAleksei Mamlin .of_match_table = of_match_ptr(goodix_of_match), 9145ab09d6aSIrina Tirdea .pm = &goodix_pm_ops, 915ca96ea86SBastien Nocera }, 916ca96ea86SBastien Nocera }; 917ca96ea86SBastien Nocera module_i2c_driver(goodix_ts_driver); 918ca96ea86SBastien Nocera 919ca96ea86SBastien Nocera MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); 920ca96ea86SBastien Nocera MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>"); 921ca96ea86SBastien Nocera MODULE_DESCRIPTION("Goodix touchscreen driver"); 922ca96ea86SBastien Nocera MODULE_LICENSE("GPL v2"); 923