1b886d83cSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2ca96ea86SBastien Nocera /* 3ca96ea86SBastien Nocera * Driver for Goodix Touchscreens 4ca96ea86SBastien Nocera * 5ca96ea86SBastien Nocera * Copyright (c) 2014 Red Hat Inc. 6ad48cf5eSKarsten Merker * Copyright (c) 2015 K. Merker <merker@debian.org> 7ca96ea86SBastien Nocera * 8ca96ea86SBastien Nocera * This code is based on gt9xx.c authored by andrew@goodix.com: 9ca96ea86SBastien Nocera * 10ca96ea86SBastien Nocera * 2010 - 2012 Goodix Technology. 11ca96ea86SBastien Nocera */ 12ca96ea86SBastien Nocera 13ca96ea86SBastien Nocera 14ca96ea86SBastien Nocera #include <linux/kernel.h> 158b5a359cSBastien Nocera #include <linux/dmi.h> 1668caf858SIrina Tirdea #include <linux/firmware.h> 17ca96ea86SBastien Nocera #include <linux/module.h> 18ca96ea86SBastien Nocera #include <linux/delay.h> 19ca96ea86SBastien Nocera #include <linux/irq.h> 20ca96ea86SBastien Nocera #include <linux/interrupt.h> 21ca96ea86SBastien Nocera #include <linux/slab.h> 22771d8f1bSAleksei Mamlin #include <linux/acpi.h> 23771d8f1bSAleksei Mamlin #include <linux/of.h> 24ca96ea86SBastien Nocera #include <asm/unaligned.h> 25a2233cb7SHans de Goede #include "goodix.h" 26ca96ea86SBastien Nocera 27aebfc52cSHans de Goede #define GOODIX_GPIO_INT_NAME "irq" 28aebfc52cSHans de Goede #define GOODIX_GPIO_RST_NAME "reset" 29aebfc52cSHans de Goede 30aebfc52cSHans de Goede #define GOODIX_MAX_HEIGHT 4096 31aebfc52cSHans de Goede #define GOODIX_MAX_WIDTH 4096 32aebfc52cSHans de Goede #define GOODIX_INT_TRIGGER 1 33aebfc52cSHans de Goede #define GOODIX_CONTACT_SIZE 8 34aebfc52cSHans de Goede #define GOODIX_MAX_CONTACT_SIZE 9 35aebfc52cSHans de Goede #define GOODIX_MAX_CONTACTS 10 36aebfc52cSHans de Goede 37686e8a24SHans de Goede #define GOODIX_CONFIG_MIN_LENGTH 186 38aebfc52cSHans de Goede #define GOODIX_CONFIG_911_LENGTH 186 39aebfc52cSHans de Goede #define GOODIX_CONFIG_967_LENGTH 228 40686e8a24SHans de Goede #define GOODIX_CONFIG_GT9X_LENGTH 240 41aebfc52cSHans de Goede 42aebfc52cSHans de Goede #define GOODIX_BUFFER_STATUS_READY BIT(7) 43492ee52cSDmitry Mastykin #define GOODIX_HAVE_KEY BIT(4) 44aebfc52cSHans de Goede #define GOODIX_BUFFER_STATUS_TIMEOUT 20 45aebfc52cSHans de Goede 46aebfc52cSHans de Goede #define RESOLUTION_LOC 1 47aebfc52cSHans de Goede #define MAX_CONTACTS_LOC 5 48aebfc52cSHans de Goede #define TRIGGER_LOC 6 49aebfc52cSHans de Goede 50c9c20ee3SHans de Goede /* Our special handling for GPIO accesses through ACPI is x86 specific */ 51c9c20ee3SHans de Goede #if defined CONFIG_X86 && defined CONFIG_ACPI 52c9c20ee3SHans de Goede #define ACPI_GPIO_SUPPORT 53c9c20ee3SHans de Goede #endif 54c9c20ee3SHans de Goede 55cae102e2SIcenowy Zheng struct goodix_chip_id { 56cae102e2SIcenowy Zheng const char *id; 57cae102e2SIcenowy Zheng const struct goodix_chip_data *data; 58cae102e2SIcenowy Zheng }; 59cae102e2SIcenowy Zheng 6025309004SMarcin Niestroj static int goodix_check_cfg_8(struct goodix_ts_data *ts, 611a67448fSHans de Goede const u8 *cfg, int len); 6225309004SMarcin Niestroj static int goodix_check_cfg_16(struct goodix_ts_data *ts, 631a67448fSHans de Goede const u8 *cfg, int len); 64de956caeSHans de Goede static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts); 65de956caeSHans de Goede static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts); 6625309004SMarcin Niestroj 6725309004SMarcin Niestroj static const struct goodix_chip_data gt1x_chip_data = { 6825309004SMarcin Niestroj .config_addr = GOODIX_GT1X_REG_CONFIG_DATA, 69686e8a24SHans de Goede .config_len = GOODIX_CONFIG_GT9X_LENGTH, 7025309004SMarcin Niestroj .check_config = goodix_check_cfg_16, 71de956caeSHans de Goede .calc_config_checksum = goodix_calc_cfg_checksum_16, 7225309004SMarcin Niestroj }; 7325309004SMarcin Niestroj 7425309004SMarcin Niestroj static const struct goodix_chip_data gt911_chip_data = { 7525309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 7625309004SMarcin Niestroj .config_len = GOODIX_CONFIG_911_LENGTH, 7725309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 78de956caeSHans de Goede .calc_config_checksum = goodix_calc_cfg_checksum_8, 7925309004SMarcin Niestroj }; 8025309004SMarcin Niestroj 8125309004SMarcin Niestroj static const struct goodix_chip_data gt967_chip_data = { 8225309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 8325309004SMarcin Niestroj .config_len = GOODIX_CONFIG_967_LENGTH, 8425309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 85de956caeSHans de Goede .calc_config_checksum = goodix_calc_cfg_checksum_8, 8625309004SMarcin Niestroj }; 8725309004SMarcin Niestroj 8825309004SMarcin Niestroj static const struct goodix_chip_data gt9x_chip_data = { 8925309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 90686e8a24SHans de Goede .config_len = GOODIX_CONFIG_GT9X_LENGTH, 9125309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 92de956caeSHans de Goede .calc_config_checksum = goodix_calc_cfg_checksum_8, 9325309004SMarcin Niestroj }; 9425309004SMarcin Niestroj 95cae102e2SIcenowy Zheng static const struct goodix_chip_id goodix_chip_ids[] = { 96cae102e2SIcenowy Zheng { .id = "1151", .data = >1x_chip_data }, 97cae102e2SIcenowy Zheng { .id = "5663", .data = >1x_chip_data }, 98cae102e2SIcenowy Zheng { .id = "5688", .data = >1x_chip_data }, 99b5e458afSIcenowy Zheng { .id = "917S", .data = >1x_chip_data }, 1002dce6db7SAngeloGioacchino Del Regno { .id = "9286", .data = >1x_chip_data }, 101cae102e2SIcenowy Zheng 102cae102e2SIcenowy Zheng { .id = "911", .data = >911_chip_data }, 103cae102e2SIcenowy Zheng { .id = "9271", .data = >911_chip_data }, 104cae102e2SIcenowy Zheng { .id = "9110", .data = >911_chip_data }, 105cae102e2SIcenowy Zheng { .id = "927", .data = >911_chip_data }, 106cae102e2SIcenowy Zheng { .id = "928", .data = >911_chip_data }, 107cae102e2SIcenowy Zheng 108cae102e2SIcenowy Zheng { .id = "912", .data = >967_chip_data }, 109b9a1c116SYannick Fertre { .id = "9147", .data = >967_chip_data }, 110cae102e2SIcenowy Zheng { .id = "967", .data = >967_chip_data }, 111cae102e2SIcenowy Zheng { } 112cae102e2SIcenowy Zheng }; 113cae102e2SIcenowy Zheng 114ca96ea86SBastien Nocera static const unsigned long goodix_irq_flags[] = { 115ca96ea86SBastien Nocera IRQ_TYPE_EDGE_RISING, 116ca96ea86SBastien Nocera IRQ_TYPE_EDGE_FALLING, 117ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_LOW, 118ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_HIGH, 119ca96ea86SBastien Nocera }; 120ca96ea86SBastien Nocera 121bd3b8480SYauhen Kharuzhy static const struct dmi_system_id nine_bytes_report[] = { 122bd3b8480SYauhen Kharuzhy #if defined(CONFIG_DMI) && defined(CONFIG_X86) 123bd3b8480SYauhen Kharuzhy { 124bd3b8480SYauhen Kharuzhy .ident = "Lenovo YogaBook", 125bd3b8480SYauhen Kharuzhy /* YB1-X91L/F and YB1-X90L/F */ 126bd3b8480SYauhen Kharuzhy .matches = { 127bd3b8480SYauhen Kharuzhy DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X9") 128bd3b8480SYauhen Kharuzhy } 129bd3b8480SYauhen Kharuzhy }, 130bd3b8480SYauhen Kharuzhy #endif 131bd3b8480SYauhen Kharuzhy {} 132bd3b8480SYauhen Kharuzhy }; 133bd3b8480SYauhen Kharuzhy 1341dd5ddc1SSergei A. Trusov /* 1351dd5ddc1SSergei A. Trusov * Those tablets have their x coordinate inverted 1361dd5ddc1SSergei A. Trusov */ 1371dd5ddc1SSergei A. Trusov static const struct dmi_system_id inverted_x_screen[] = { 1381dd5ddc1SSergei A. Trusov #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1391dd5ddc1SSergei A. Trusov { 1401dd5ddc1SSergei A. Trusov .ident = "Cube I15-TC", 1411dd5ddc1SSergei A. Trusov .matches = { 1421dd5ddc1SSergei A. Trusov DMI_MATCH(DMI_SYS_VENDOR, "Cube"), 1431dd5ddc1SSergei A. Trusov DMI_MATCH(DMI_PRODUCT_NAME, "I15-TC") 1441dd5ddc1SSergei A. Trusov }, 1451dd5ddc1SSergei A. Trusov }, 1461dd5ddc1SSergei A. Trusov #endif 1471dd5ddc1SSergei A. Trusov {} 1481dd5ddc1SSergei A. Trusov }; 1491dd5ddc1SSergei A. Trusov 150ca96ea86SBastien Nocera /** 151ca96ea86SBastien Nocera * goodix_i2c_read - read data from a register of the i2c slave device. 152ca96ea86SBastien Nocera * 153ca96ea86SBastien Nocera * @client: i2c device. 154ca96ea86SBastien Nocera * @reg: the register to read from. 155ca96ea86SBastien Nocera * @buf: raw write data buffer. 156ca96ea86SBastien Nocera * @len: length of the buffer to write 157ca96ea86SBastien Nocera */ 158a2233cb7SHans de Goede int goodix_i2c_read(struct i2c_client *client, u16 reg, u8 *buf, int len) 159ca96ea86SBastien Nocera { 160ca96ea86SBastien Nocera struct i2c_msg msgs[2]; 161fafef982SMarcin Niestroj __be16 wbuf = cpu_to_be16(reg); 162ca96ea86SBastien Nocera int ret; 163ca96ea86SBastien Nocera 164ca96ea86SBastien Nocera msgs[0].flags = 0; 165ca96ea86SBastien Nocera msgs[0].addr = client->addr; 166ca96ea86SBastien Nocera msgs[0].len = 2; 167ca96ea86SBastien Nocera msgs[0].buf = (u8 *)&wbuf; 168ca96ea86SBastien Nocera 169ca96ea86SBastien Nocera msgs[1].flags = I2C_M_RD; 170ca96ea86SBastien Nocera msgs[1].addr = client->addr; 171ca96ea86SBastien Nocera msgs[1].len = len; 172ca96ea86SBastien Nocera msgs[1].buf = buf; 173ca96ea86SBastien Nocera 174ca96ea86SBastien Nocera ret = i2c_transfer(client->adapter, msgs, 2); 1757642f29cSHans de Goede if (ret >= 0) 1767642f29cSHans de Goede ret = (ret == ARRAY_SIZE(msgs) ? 0 : -EIO); 1777642f29cSHans de Goede 1787642f29cSHans de Goede if (ret) 1797642f29cSHans de Goede dev_err(&client->dev, "Error reading %d bytes from 0x%04x: %d\n", 1807642f29cSHans de Goede len, reg, ret); 1817642f29cSHans de Goede return ret; 182ca96ea86SBastien Nocera } 183ca96ea86SBastien Nocera 18468caf858SIrina Tirdea /** 18568caf858SIrina Tirdea * goodix_i2c_write - write data to a register of the i2c slave device. 18668caf858SIrina Tirdea * 18768caf858SIrina Tirdea * @client: i2c device. 18868caf858SIrina Tirdea * @reg: the register to write to. 18968caf858SIrina Tirdea * @buf: raw data buffer to write. 19068caf858SIrina Tirdea * @len: length of the buffer to write 19168caf858SIrina Tirdea */ 192a2233cb7SHans de Goede int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf, int len) 19368caf858SIrina Tirdea { 19468caf858SIrina Tirdea u8 *addr_buf; 19568caf858SIrina Tirdea struct i2c_msg msg; 19668caf858SIrina Tirdea int ret; 19768caf858SIrina Tirdea 19868caf858SIrina Tirdea addr_buf = kmalloc(len + 2, GFP_KERNEL); 19968caf858SIrina Tirdea if (!addr_buf) 20068caf858SIrina Tirdea return -ENOMEM; 20168caf858SIrina Tirdea 20268caf858SIrina Tirdea addr_buf[0] = reg >> 8; 20368caf858SIrina Tirdea addr_buf[1] = reg & 0xFF; 20468caf858SIrina Tirdea memcpy(&addr_buf[2], buf, len); 20568caf858SIrina Tirdea 20668caf858SIrina Tirdea msg.flags = 0; 20768caf858SIrina Tirdea msg.addr = client->addr; 20868caf858SIrina Tirdea msg.buf = addr_buf; 20968caf858SIrina Tirdea msg.len = len + 2; 21068caf858SIrina Tirdea 21168caf858SIrina Tirdea ret = i2c_transfer(client->adapter, &msg, 1); 2127642f29cSHans de Goede if (ret >= 0) 2137642f29cSHans de Goede ret = (ret == 1 ? 0 : -EIO); 2147642f29cSHans de Goede 21568caf858SIrina Tirdea kfree(addr_buf); 2167642f29cSHans de Goede 2177642f29cSHans de Goede if (ret) 2187642f29cSHans de Goede dev_err(&client->dev, "Error writing %d bytes to 0x%04x: %d\n", 2197642f29cSHans de Goede len, reg, ret); 2207642f29cSHans de Goede return ret; 22168caf858SIrina Tirdea } 22268caf858SIrina Tirdea 223a2233cb7SHans de Goede int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value) 2245ab09d6aSIrina Tirdea { 2255ab09d6aSIrina Tirdea return goodix_i2c_write(client, reg, &value, sizeof(value)); 2265ab09d6aSIrina Tirdea } 2275ab09d6aSIrina Tirdea 228cae102e2SIcenowy Zheng static const struct goodix_chip_data *goodix_get_chip_data(const char *id) 229a779fbc6SIrina Tirdea { 230cae102e2SIcenowy Zheng unsigned int i; 23125309004SMarcin Niestroj 232cae102e2SIcenowy Zheng for (i = 0; goodix_chip_ids[i].id; i++) { 233cae102e2SIcenowy Zheng if (!strcmp(goodix_chip_ids[i].id, id)) 234cae102e2SIcenowy Zheng return goodix_chip_ids[i].data; 235a779fbc6SIrina Tirdea } 236cae102e2SIcenowy Zheng 237cae102e2SIcenowy Zheng return >9x_chip_data; 238a779fbc6SIrina Tirdea } 239a779fbc6SIrina Tirdea 240ca96ea86SBastien Nocera static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data) 241ca96ea86SBastien Nocera { 2429b5db7aaSPaul Cercueil unsigned long max_timeout; 243ca96ea86SBastien Nocera int touch_num; 244ca96ea86SBastien Nocera int error; 245492ee52cSDmitry Mastykin u16 addr = GOODIX_READ_COOR_ADDR; 246492ee52cSDmitry Mastykin /* 247492ee52cSDmitry Mastykin * We are going to read 1-byte header, 248492ee52cSDmitry Mastykin * ts->contact_size * max(1, touch_num) bytes of coordinates 249492ee52cSDmitry Mastykin * and 1-byte footer which contains the touch-key code. 250492ee52cSDmitry Mastykin */ 251492ee52cSDmitry Mastykin const int header_contact_keycode_size = 1 + ts->contact_size + 1; 252ca96ea86SBastien Nocera 2539b5db7aaSPaul Cercueil /* 2549b5db7aaSPaul Cercueil * The 'buffer status' bit, which indicates that the data is valid, is 2559b5db7aaSPaul Cercueil * not set as soon as the interrupt is raised, but slightly after. 2569b5db7aaSPaul Cercueil * This takes around 10 ms to happen, so we poll for 20 ms. 2579b5db7aaSPaul Cercueil */ 2589b5db7aaSPaul Cercueil max_timeout = jiffies + msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT); 2599b5db7aaSPaul Cercueil do { 260492ee52cSDmitry Mastykin error = goodix_i2c_read(ts->client, addr, data, 261492ee52cSDmitry Mastykin header_contact_keycode_size); 2627642f29cSHans de Goede if (error) 263ca96ea86SBastien Nocera return error; 264ca96ea86SBastien Nocera 2659b5db7aaSPaul Cercueil if (data[0] & GOODIX_BUFFER_STATUS_READY) { 266ca96ea86SBastien Nocera touch_num = data[0] & 0x0f; 267a7ac7c95SAleksei Mamlin if (touch_num > ts->max_touch_num) 268ca96ea86SBastien Nocera return -EPROTO; 269ca96ea86SBastien Nocera 270ca96ea86SBastien Nocera if (touch_num > 1) { 271492ee52cSDmitry Mastykin addr += header_contact_keycode_size; 272492ee52cSDmitry Mastykin data += header_contact_keycode_size; 273ca96ea86SBastien Nocera error = goodix_i2c_read(ts->client, 274492ee52cSDmitry Mastykin addr, data, 275bd3b8480SYauhen Kharuzhy ts->contact_size * 2769b5db7aaSPaul Cercueil (touch_num - 1)); 277ca96ea86SBastien Nocera if (error) 278ca96ea86SBastien Nocera return error; 279ca96ea86SBastien Nocera } 280ca96ea86SBastien Nocera 281ca96ea86SBastien Nocera return touch_num; 282ca96ea86SBastien Nocera } 283ca96ea86SBastien Nocera 28409182ed2SHans de Goede if (data[0] == 0 && ts->firmware_name) { 28509182ed2SHans de Goede if (goodix_handle_fw_request(ts)) 28609182ed2SHans de Goede return 0; 28709182ed2SHans de Goede } 28809182ed2SHans de Goede 2899b5db7aaSPaul Cercueil usleep_range(1000, 2000); /* Poll every 1 - 2 ms */ 2909b5db7aaSPaul Cercueil } while (time_before(jiffies, max_timeout)); 2919b5db7aaSPaul Cercueil 2929b5db7aaSPaul Cercueil /* 2939b5db7aaSPaul Cercueil * The Goodix panel will send spurious interrupts after a 2949b5db7aaSPaul Cercueil * 'finger up' event, which will always cause a timeout. 2959b5db7aaSPaul Cercueil */ 29624ef83f6SDmitry Mastykin return -ENOMSG; 2979b5db7aaSPaul Cercueil } 2989b5db7aaSPaul Cercueil 299*5ede7f0cSHans de Goede static struct input_dev *goodix_create_pen_input(struct goodix_ts_data *ts) 300*5ede7f0cSHans de Goede { 301*5ede7f0cSHans de Goede struct device *dev = &ts->client->dev; 302*5ede7f0cSHans de Goede struct input_dev *input; 303*5ede7f0cSHans de Goede 304*5ede7f0cSHans de Goede input = devm_input_allocate_device(dev); 305*5ede7f0cSHans de Goede if (!input) 306*5ede7f0cSHans de Goede return NULL; 307*5ede7f0cSHans de Goede 308*5ede7f0cSHans de Goede input_alloc_absinfo(input); 309*5ede7f0cSHans de Goede if (!input->absinfo) { 310*5ede7f0cSHans de Goede input_free_device(input); 311*5ede7f0cSHans de Goede return NULL; 312*5ede7f0cSHans de Goede } 313*5ede7f0cSHans de Goede 314*5ede7f0cSHans de Goede input->absinfo[ABS_X] = ts->input_dev->absinfo[ABS_MT_POSITION_X]; 315*5ede7f0cSHans de Goede input->absinfo[ABS_Y] = ts->input_dev->absinfo[ABS_MT_POSITION_Y]; 316*5ede7f0cSHans de Goede __set_bit(ABS_X, input->absbit); 317*5ede7f0cSHans de Goede __set_bit(ABS_Y, input->absbit); 318*5ede7f0cSHans de Goede input_set_abs_params(input, ABS_PRESSURE, 0, 255, 0, 0); 319*5ede7f0cSHans de Goede 320*5ede7f0cSHans de Goede input_set_capability(input, EV_KEY, BTN_TOUCH); 321*5ede7f0cSHans de Goede input_set_capability(input, EV_KEY, BTN_TOOL_PEN); 322*5ede7f0cSHans de Goede input_set_capability(input, EV_KEY, BTN_STYLUS); 323*5ede7f0cSHans de Goede input_set_capability(input, EV_KEY, BTN_STYLUS2); 324*5ede7f0cSHans de Goede __set_bit(INPUT_PROP_DIRECT, input->propbit); 325*5ede7f0cSHans de Goede /* 326*5ede7f0cSHans de Goede * The resolution of these touchscreens is about 10 units/mm, the actual 327*5ede7f0cSHans de Goede * resolution does not matter much since we set INPUT_PROP_DIRECT. 328*5ede7f0cSHans de Goede * Userspace wants something here though, so just set it to 10 units/mm. 329*5ede7f0cSHans de Goede */ 330*5ede7f0cSHans de Goede input_abs_set_res(input, ABS_X, 10); 331*5ede7f0cSHans de Goede input_abs_set_res(input, ABS_Y, 10); 332*5ede7f0cSHans de Goede 333*5ede7f0cSHans de Goede input->name = "Goodix Active Pen"; 334*5ede7f0cSHans de Goede input->phys = "input/pen"; 335*5ede7f0cSHans de Goede input->id.bustype = BUS_I2C; 336*5ede7f0cSHans de Goede if (kstrtou16(ts->id, 10, &input->id.product)) 337*5ede7f0cSHans de Goede input->id.product = 0x1001; 338*5ede7f0cSHans de Goede input->id.version = ts->version; 339*5ede7f0cSHans de Goede 340*5ede7f0cSHans de Goede if (input_register_device(input) != 0) { 341*5ede7f0cSHans de Goede input_free_device(input); 342*5ede7f0cSHans de Goede return NULL; 343*5ede7f0cSHans de Goede } 344*5ede7f0cSHans de Goede 345*5ede7f0cSHans de Goede return input; 346*5ede7f0cSHans de Goede } 347*5ede7f0cSHans de Goede 348*5ede7f0cSHans de Goede static void goodix_ts_report_pen_down(struct goodix_ts_data *ts, u8 *data) 349*5ede7f0cSHans de Goede { 350*5ede7f0cSHans de Goede int input_x, input_y, input_w; 351*5ede7f0cSHans de Goede u8 key_value; 352*5ede7f0cSHans de Goede 353*5ede7f0cSHans de Goede if (!ts->input_pen) { 354*5ede7f0cSHans de Goede ts->input_pen = goodix_create_pen_input(ts); 355*5ede7f0cSHans de Goede if (!ts->input_pen) 356*5ede7f0cSHans de Goede return; 357*5ede7f0cSHans de Goede } 358*5ede7f0cSHans de Goede 359*5ede7f0cSHans de Goede if (ts->contact_size == 9) { 360*5ede7f0cSHans de Goede input_x = get_unaligned_le16(&data[4]); 361*5ede7f0cSHans de Goede input_y = get_unaligned_le16(&data[6]); 362*5ede7f0cSHans de Goede input_w = get_unaligned_le16(&data[8]); 363*5ede7f0cSHans de Goede } else { 364*5ede7f0cSHans de Goede input_x = get_unaligned_le16(&data[2]); 365*5ede7f0cSHans de Goede input_y = get_unaligned_le16(&data[4]); 366*5ede7f0cSHans de Goede input_w = get_unaligned_le16(&data[6]); 367*5ede7f0cSHans de Goede } 368*5ede7f0cSHans de Goede 369*5ede7f0cSHans de Goede touchscreen_report_pos(ts->input_pen, &ts->prop, input_x, input_y, false); 370*5ede7f0cSHans de Goede input_report_abs(ts->input_pen, ABS_PRESSURE, input_w); 371*5ede7f0cSHans de Goede 372*5ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_TOUCH, 1); 373*5ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_TOOL_PEN, 1); 374*5ede7f0cSHans de Goede 375*5ede7f0cSHans de Goede if (data[0] & GOODIX_HAVE_KEY) { 376*5ede7f0cSHans de Goede key_value = data[1 + ts->contact_size]; 377*5ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_STYLUS, key_value & 0x10); 378*5ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_STYLUS2, key_value & 0x20); 379*5ede7f0cSHans de Goede } else { 380*5ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_STYLUS, 0); 381*5ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_STYLUS2, 0); 382*5ede7f0cSHans de Goede } 383*5ede7f0cSHans de Goede 384*5ede7f0cSHans de Goede input_sync(ts->input_pen); 385*5ede7f0cSHans de Goede } 386*5ede7f0cSHans de Goede 387*5ede7f0cSHans de Goede static void goodix_ts_report_pen_up(struct goodix_ts_data *ts) 388*5ede7f0cSHans de Goede { 389*5ede7f0cSHans de Goede if (!ts->input_pen) 390*5ede7f0cSHans de Goede return; 391*5ede7f0cSHans de Goede 392*5ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_TOUCH, 0); 393*5ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_TOOL_PEN, 0); 394*5ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_STYLUS, 0); 395*5ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_STYLUS2, 0); 396*5ede7f0cSHans de Goede 397*5ede7f0cSHans de Goede input_sync(ts->input_pen); 398*5ede7f0cSHans de Goede } 399*5ede7f0cSHans de Goede 400bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_8b(struct goodix_ts_data *ts, u8 *coor_data) 401ca96ea86SBastien Nocera { 402ca96ea86SBastien Nocera int id = coor_data[0] & 0x0F; 403ca96ea86SBastien Nocera int input_x = get_unaligned_le16(&coor_data[1]); 404ca96ea86SBastien Nocera int input_y = get_unaligned_le16(&coor_data[3]); 405ca96ea86SBastien Nocera int input_w = get_unaligned_le16(&coor_data[5]); 406ca96ea86SBastien Nocera 407ca96ea86SBastien Nocera input_mt_slot(ts->input_dev, id); 408ca96ea86SBastien Nocera input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 409fafef982SMarcin Niestroj touchscreen_report_pos(ts->input_dev, &ts->prop, 410fafef982SMarcin Niestroj input_x, input_y, true); 411ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 412ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 413ca96ea86SBastien Nocera } 414ca96ea86SBastien Nocera 415bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_9b(struct goodix_ts_data *ts, u8 *coor_data) 416bd3b8480SYauhen Kharuzhy { 417bd3b8480SYauhen Kharuzhy int id = coor_data[1] & 0x0F; 418bd3b8480SYauhen Kharuzhy int input_x = get_unaligned_le16(&coor_data[3]); 419bd3b8480SYauhen Kharuzhy int input_y = get_unaligned_le16(&coor_data[5]); 420bd3b8480SYauhen Kharuzhy int input_w = get_unaligned_le16(&coor_data[7]); 421bd3b8480SYauhen Kharuzhy 422bd3b8480SYauhen Kharuzhy input_mt_slot(ts->input_dev, id); 423bd3b8480SYauhen Kharuzhy input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 424bd3b8480SYauhen Kharuzhy touchscreen_report_pos(ts->input_dev, &ts->prop, 425bd3b8480SYauhen Kharuzhy input_x, input_y, true); 426bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 427bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 428bd3b8480SYauhen Kharuzhy } 429bd3b8480SYauhen Kharuzhy 430*5ede7f0cSHans de Goede static void goodix_ts_release_keys(struct goodix_ts_data *ts) 431*5ede7f0cSHans de Goede { 432*5ede7f0cSHans de Goede int i; 433*5ede7f0cSHans de Goede 434*5ede7f0cSHans de Goede for (i = 0; i < GOODIX_MAX_KEYS; i++) 435*5ede7f0cSHans de Goede input_report_key(ts->input_dev, ts->keymap[i], 0); 436*5ede7f0cSHans de Goede } 437*5ede7f0cSHans de Goede 438492ee52cSDmitry Mastykin static void goodix_ts_report_key(struct goodix_ts_data *ts, u8 *data) 439492ee52cSDmitry Mastykin { 440492ee52cSDmitry Mastykin int touch_num; 441492ee52cSDmitry Mastykin u8 key_value; 442492ee52cSDmitry Mastykin int i; 443492ee52cSDmitry Mastykin 444492ee52cSDmitry Mastykin if (data[0] & GOODIX_HAVE_KEY) { 445492ee52cSDmitry Mastykin touch_num = data[0] & 0x0f; 446492ee52cSDmitry Mastykin key_value = data[1 + ts->contact_size * touch_num]; 447492ee52cSDmitry Mastykin for (i = 0; i < GOODIX_MAX_KEYS; i++) 448492ee52cSDmitry Mastykin if (key_value & BIT(i)) 449492ee52cSDmitry Mastykin input_report_key(ts->input_dev, 450492ee52cSDmitry Mastykin ts->keymap[i], 1); 451492ee52cSDmitry Mastykin } else { 452*5ede7f0cSHans de Goede goodix_ts_release_keys(ts); 453492ee52cSDmitry Mastykin } 454492ee52cSDmitry Mastykin } 455492ee52cSDmitry Mastykin 456ca96ea86SBastien Nocera /** 457ca96ea86SBastien Nocera * goodix_process_events - Process incoming events 458ca96ea86SBastien Nocera * 459ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 460ca96ea86SBastien Nocera * 461ca96ea86SBastien Nocera * Called when the IRQ is triggered. Read the current device state, and push 462ca96ea86SBastien Nocera * the input events to the user space. 463ca96ea86SBastien Nocera */ 464ca96ea86SBastien Nocera static void goodix_process_events(struct goodix_ts_data *ts) 465ca96ea86SBastien Nocera { 466492ee52cSDmitry Mastykin u8 point_data[2 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS]; 467ca96ea86SBastien Nocera int touch_num; 468ca96ea86SBastien Nocera int i; 469ca96ea86SBastien Nocera 470ca96ea86SBastien Nocera touch_num = goodix_ts_read_input_report(ts, point_data); 471ca96ea86SBastien Nocera if (touch_num < 0) 472ca96ea86SBastien Nocera return; 473ca96ea86SBastien Nocera 474*5ede7f0cSHans de Goede /* The pen being down is always reported as a single touch */ 475*5ede7f0cSHans de Goede if (touch_num == 1 && (point_data[1] & 0x80)) { 476*5ede7f0cSHans de Goede goodix_ts_report_pen_down(ts, point_data); 477*5ede7f0cSHans de Goede goodix_ts_release_keys(ts); 478*5ede7f0cSHans de Goede goto sync; /* Release any previousle registered touches */ 479*5ede7f0cSHans de Goede } else { 480*5ede7f0cSHans de Goede goodix_ts_report_pen_up(ts); 481*5ede7f0cSHans de Goede } 482*5ede7f0cSHans de Goede 483492ee52cSDmitry Mastykin goodix_ts_report_key(ts, point_data); 4844a54feeaSSergei A. Trusov 485ca96ea86SBastien Nocera for (i = 0; i < touch_num; i++) 486bd3b8480SYauhen Kharuzhy if (ts->contact_size == 9) 487bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_9b(ts, 488bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 489bd3b8480SYauhen Kharuzhy else 490bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_8b(ts, 491bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 492ca96ea86SBastien Nocera 493*5ede7f0cSHans de Goede sync: 494ca96ea86SBastien Nocera input_mt_sync_frame(ts->input_dev); 495ca96ea86SBastien Nocera input_sync(ts->input_dev); 496ca96ea86SBastien Nocera } 497ca96ea86SBastien Nocera 498ca96ea86SBastien Nocera /** 499ca96ea86SBastien Nocera * goodix_ts_irq_handler - The IRQ handler 500ca96ea86SBastien Nocera * 501ca96ea86SBastien Nocera * @irq: interrupt number. 502ca96ea86SBastien Nocera * @dev_id: private data pointer. 503ca96ea86SBastien Nocera */ 504ca96ea86SBastien Nocera static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id) 505ca96ea86SBastien Nocera { 506ca96ea86SBastien Nocera struct goodix_ts_data *ts = dev_id; 507ca96ea86SBastien Nocera 508ca96ea86SBastien Nocera goodix_process_events(ts); 5097642f29cSHans de Goede goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0); 510ca96ea86SBastien Nocera 511ca96ea86SBastien Nocera return IRQ_HANDLED; 512ca96ea86SBastien Nocera } 513ca96ea86SBastien Nocera 5145ab09d6aSIrina Tirdea static void goodix_free_irq(struct goodix_ts_data *ts) 5155ab09d6aSIrina Tirdea { 5165ab09d6aSIrina Tirdea devm_free_irq(&ts->client->dev, ts->client->irq, ts); 5175ab09d6aSIrina Tirdea } 5185ab09d6aSIrina Tirdea 5195ab09d6aSIrina Tirdea static int goodix_request_irq(struct goodix_ts_data *ts) 5205ab09d6aSIrina Tirdea { 5215ab09d6aSIrina Tirdea return devm_request_threaded_irq(&ts->client->dev, ts->client->irq, 5225ab09d6aSIrina Tirdea NULL, goodix_ts_irq_handler, 5235ab09d6aSIrina Tirdea ts->irq_flags, ts->client->name, ts); 5245ab09d6aSIrina Tirdea } 5255ab09d6aSIrina Tirdea 5261a67448fSHans de Goede static int goodix_check_cfg_8(struct goodix_ts_data *ts, const u8 *cfg, int len) 52768caf858SIrina Tirdea { 5281a67448fSHans de Goede int i, raw_cfg_len = len - 2; 52968caf858SIrina Tirdea u8 check_sum = 0; 53068caf858SIrina Tirdea 53168caf858SIrina Tirdea for (i = 0; i < raw_cfg_len; i++) 5321a67448fSHans de Goede check_sum += cfg[i]; 53368caf858SIrina Tirdea check_sum = (~check_sum) + 1; 5341a67448fSHans de Goede if (check_sum != cfg[raw_cfg_len]) { 53568caf858SIrina Tirdea dev_err(&ts->client->dev, 53668caf858SIrina Tirdea "The checksum of the config fw is not correct"); 53768caf858SIrina Tirdea return -EINVAL; 53868caf858SIrina Tirdea } 53968caf858SIrina Tirdea 5401a67448fSHans de Goede if (cfg[raw_cfg_len + 1] != 1) { 54168caf858SIrina Tirdea dev_err(&ts->client->dev, 54268caf858SIrina Tirdea "Config fw must have Config_Fresh register set"); 54368caf858SIrina Tirdea return -EINVAL; 54468caf858SIrina Tirdea } 54568caf858SIrina Tirdea 54668caf858SIrina Tirdea return 0; 54768caf858SIrina Tirdea } 54868caf858SIrina Tirdea 549de956caeSHans de Goede static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts) 550de956caeSHans de Goede { 551de956caeSHans de Goede int i, raw_cfg_len = ts->chip->config_len - 2; 552de956caeSHans de Goede u8 check_sum = 0; 553de956caeSHans de Goede 554de956caeSHans de Goede for (i = 0; i < raw_cfg_len; i++) 555de956caeSHans de Goede check_sum += ts->config[i]; 556de956caeSHans de Goede check_sum = (~check_sum) + 1; 557de956caeSHans de Goede 558de956caeSHans de Goede ts->config[raw_cfg_len] = check_sum; 559de956caeSHans de Goede ts->config[raw_cfg_len + 1] = 1; /* Set "config_fresh" bit */ 560de956caeSHans de Goede } 561de956caeSHans de Goede 5621a67448fSHans de Goede static int goodix_check_cfg_16(struct goodix_ts_data *ts, const u8 *cfg, 5631a67448fSHans de Goede int len) 56425309004SMarcin Niestroj { 5651a67448fSHans de Goede int i, raw_cfg_len = len - 3; 56625309004SMarcin Niestroj u16 check_sum = 0; 56725309004SMarcin Niestroj 56825309004SMarcin Niestroj for (i = 0; i < raw_cfg_len; i += 2) 5691a67448fSHans de Goede check_sum += get_unaligned_be16(&cfg[i]); 57025309004SMarcin Niestroj check_sum = (~check_sum) + 1; 5711a67448fSHans de Goede if (check_sum != get_unaligned_be16(&cfg[raw_cfg_len])) { 57225309004SMarcin Niestroj dev_err(&ts->client->dev, 57325309004SMarcin Niestroj "The checksum of the config fw is not correct"); 57425309004SMarcin Niestroj return -EINVAL; 57525309004SMarcin Niestroj } 57625309004SMarcin Niestroj 5771a67448fSHans de Goede if (cfg[raw_cfg_len + 2] != 1) { 57825309004SMarcin Niestroj dev_err(&ts->client->dev, 57925309004SMarcin Niestroj "Config fw must have Config_Fresh register set"); 58025309004SMarcin Niestroj return -EINVAL; 58125309004SMarcin Niestroj } 58225309004SMarcin Niestroj 58325309004SMarcin Niestroj return 0; 58425309004SMarcin Niestroj } 58525309004SMarcin Niestroj 586de956caeSHans de Goede static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts) 587de956caeSHans de Goede { 588de956caeSHans de Goede int i, raw_cfg_len = ts->chip->config_len - 3; 589de956caeSHans de Goede u16 check_sum = 0; 590de956caeSHans de Goede 591de956caeSHans de Goede for (i = 0; i < raw_cfg_len; i += 2) 592de956caeSHans de Goede check_sum += get_unaligned_be16(&ts->config[i]); 593de956caeSHans de Goede check_sum = (~check_sum) + 1; 594de956caeSHans de Goede 595de956caeSHans de Goede put_unaligned_be16(check_sum, &ts->config[raw_cfg_len]); 596de956caeSHans de Goede ts->config[raw_cfg_len + 2] = 1; /* Set "config_fresh" bit */ 597de956caeSHans de Goede } 598de956caeSHans de Goede 59925309004SMarcin Niestroj /** 60025309004SMarcin Niestroj * goodix_check_cfg - Checks if config fw is valid 60125309004SMarcin Niestroj * 60225309004SMarcin Niestroj * @ts: goodix_ts_data pointer 60325309004SMarcin Niestroj * @cfg: firmware config data 604cb690465SLee Jones * @len: config data length 60525309004SMarcin Niestroj */ 6061a67448fSHans de Goede static int goodix_check_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) 60725309004SMarcin Niestroj { 6081a67448fSHans de Goede if (len < GOODIX_CONFIG_MIN_LENGTH || 6091a67448fSHans de Goede len > GOODIX_CONFIG_MAX_LENGTH) { 61025309004SMarcin Niestroj dev_err(&ts->client->dev, 61125309004SMarcin Niestroj "The length of the config fw is not correct"); 61225309004SMarcin Niestroj return -EINVAL; 61325309004SMarcin Niestroj } 61425309004SMarcin Niestroj 6151a67448fSHans de Goede return ts->chip->check_config(ts, cfg, len); 61625309004SMarcin Niestroj } 61725309004SMarcin Niestroj 61868caf858SIrina Tirdea /** 61968caf858SIrina Tirdea * goodix_send_cfg - Write fw config to device 62068caf858SIrina Tirdea * 62168caf858SIrina Tirdea * @ts: goodix_ts_data pointer 62268caf858SIrina Tirdea * @cfg: config firmware to write to device 623cb690465SLee Jones * @len: config data length 62468caf858SIrina Tirdea */ 625a2233cb7SHans de Goede int goodix_send_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) 62668caf858SIrina Tirdea { 62768caf858SIrina Tirdea int error; 62868caf858SIrina Tirdea 6291a67448fSHans de Goede error = goodix_check_cfg(ts, cfg, len); 63068caf858SIrina Tirdea if (error) 63168caf858SIrina Tirdea return error; 63268caf858SIrina Tirdea 6331a67448fSHans de Goede error = goodix_i2c_write(ts->client, ts->chip->config_addr, cfg, len); 6347642f29cSHans de Goede if (error) 63568caf858SIrina Tirdea return error; 6367642f29cSHans de Goede 63768caf858SIrina Tirdea dev_dbg(&ts->client->dev, "Config sent successfully."); 63868caf858SIrina Tirdea 63968caf858SIrina Tirdea /* Let the firmware reconfigure itself, so sleep for 10ms */ 64068caf858SIrina Tirdea usleep_range(10000, 11000); 64168caf858SIrina Tirdea 64268caf858SIrina Tirdea return 0; 64368caf858SIrina Tirdea } 64468caf858SIrina Tirdea 645c9c20ee3SHans de Goede #ifdef ACPI_GPIO_SUPPORT 646c9c20ee3SHans de Goede static int goodix_pin_acpi_direction_input(struct goodix_ts_data *ts) 64749db3997SHans de Goede { 648c9c20ee3SHans de Goede acpi_handle handle = ACPI_HANDLE(&ts->client->dev); 649c5fca485SHans de Goede acpi_status status; 650c5fca485SHans de Goede 651c9c20ee3SHans de Goede status = acpi_evaluate_object(handle, "INTI", NULL, NULL); 652c9c20ee3SHans de Goede return ACPI_SUCCESS(status) ? 0 : -EIO; 653c9c20ee3SHans de Goede } 654c9c20ee3SHans de Goede 655c9c20ee3SHans de Goede static int goodix_pin_acpi_output_method(struct goodix_ts_data *ts, int value) 656c9c20ee3SHans de Goede { 657c9c20ee3SHans de Goede acpi_handle handle = ACPI_HANDLE(&ts->client->dev); 658c9c20ee3SHans de Goede acpi_status status; 659c9c20ee3SHans de Goede 660c9c20ee3SHans de Goede status = acpi_execute_simple_method(handle, "INTO", value); 661c9c20ee3SHans de Goede return ACPI_SUCCESS(status) ? 0 : -EIO; 662c9c20ee3SHans de Goede } 663c9c20ee3SHans de Goede #else 664c9c20ee3SHans de Goede static int goodix_pin_acpi_direction_input(struct goodix_ts_data *ts) 665c9c20ee3SHans de Goede { 666c9c20ee3SHans de Goede dev_err(&ts->client->dev, 667c9c20ee3SHans de Goede "%s called on device without ACPI support\n", __func__); 668c9c20ee3SHans de Goede return -EINVAL; 669c9c20ee3SHans de Goede } 670c9c20ee3SHans de Goede 671c9c20ee3SHans de Goede static int goodix_pin_acpi_output_method(struct goodix_ts_data *ts, int value) 672c9c20ee3SHans de Goede { 673c9c20ee3SHans de Goede dev_err(&ts->client->dev, 674c9c20ee3SHans de Goede "%s called on device without ACPI support\n", __func__); 675c9c20ee3SHans de Goede return -EINVAL; 676c9c20ee3SHans de Goede } 677c9c20ee3SHans de Goede #endif 678c9c20ee3SHans de Goede 679c9c20ee3SHans de Goede static int goodix_irq_direction_output(struct goodix_ts_data *ts, int value) 680c9c20ee3SHans de Goede { 68149db3997SHans de Goede switch (ts->irq_pin_access_method) { 68249db3997SHans de Goede case IRQ_PIN_ACCESS_NONE: 68349db3997SHans de Goede dev_err(&ts->client->dev, 68449db3997SHans de Goede "%s called without an irq_pin_access_method set\n", 68549db3997SHans de Goede __func__); 68649db3997SHans de Goede return -EINVAL; 68749db3997SHans de Goede case IRQ_PIN_ACCESS_GPIO: 68849db3997SHans de Goede return gpiod_direction_output(ts->gpiod_int, value); 689a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 690a7d4b171SHans de Goede /* 691a7d4b171SHans de Goede * The IRQ pin triggers on a falling edge, so its gets marked 692a7d4b171SHans de Goede * as active-low, use output_raw to avoid the value inversion. 693a7d4b171SHans de Goede */ 694a7d4b171SHans de Goede return gpiod_direction_output_raw(ts->gpiod_int, value); 695c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 696c9c20ee3SHans de Goede return goodix_pin_acpi_output_method(ts, value); 69749db3997SHans de Goede } 69849db3997SHans de Goede 69949db3997SHans de Goede return -EINVAL; /* Never reached */ 70049db3997SHans de Goede } 70149db3997SHans de Goede 70249db3997SHans de Goede static int goodix_irq_direction_input(struct goodix_ts_data *ts) 70349db3997SHans de Goede { 70449db3997SHans de Goede switch (ts->irq_pin_access_method) { 70549db3997SHans de Goede case IRQ_PIN_ACCESS_NONE: 70649db3997SHans de Goede dev_err(&ts->client->dev, 70749db3997SHans de Goede "%s called without an irq_pin_access_method set\n", 70849db3997SHans de Goede __func__); 70949db3997SHans de Goede return -EINVAL; 71049db3997SHans de Goede case IRQ_PIN_ACCESS_GPIO: 711c9c20ee3SHans de Goede return gpiod_direction_input(ts->gpiod_int); 712a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 71349db3997SHans de Goede return gpiod_direction_input(ts->gpiod_int); 714c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 715c9c20ee3SHans de Goede return goodix_pin_acpi_direction_input(ts); 71649db3997SHans de Goede } 71749db3997SHans de Goede 71849db3997SHans de Goede return -EINVAL; /* Never reached */ 71949db3997SHans de Goede } 72049db3997SHans de Goede 721a2233cb7SHans de Goede int goodix_int_sync(struct goodix_ts_data *ts) 722ec6e1b40SIrina Tirdea { 723ec6e1b40SIrina Tirdea int error; 724ec6e1b40SIrina Tirdea 72549db3997SHans de Goede error = goodix_irq_direction_output(ts, 0); 726ec6e1b40SIrina Tirdea if (error) 727209bda47SHans de Goede goto error; 728ec6e1b40SIrina Tirdea 729ec6e1b40SIrina Tirdea msleep(50); /* T5: 50ms */ 730ec6e1b40SIrina Tirdea 73149db3997SHans de Goede error = goodix_irq_direction_input(ts); 732ec6e1b40SIrina Tirdea if (error) 733209bda47SHans de Goede goto error; 734ec6e1b40SIrina Tirdea 735ec6e1b40SIrina Tirdea return 0; 736209bda47SHans de Goede 737209bda47SHans de Goede error: 738209bda47SHans de Goede dev_err(&ts->client->dev, "Controller irq sync failed.\n"); 739209bda47SHans de Goede return error; 740209bda47SHans de Goede } 741209bda47SHans de Goede 742209bda47SHans de Goede /** 743209bda47SHans de Goede * goodix_reset_no_int_sync - Reset device, leaving interrupt line in output mode 744209bda47SHans de Goede * 745209bda47SHans de Goede * @ts: goodix_ts_data pointer 746209bda47SHans de Goede */ 747209bda47SHans de Goede int goodix_reset_no_int_sync(struct goodix_ts_data *ts) 748209bda47SHans de Goede { 749209bda47SHans de Goede int error; 750209bda47SHans de Goede 751209bda47SHans de Goede /* begin select I2C slave addr */ 752209bda47SHans de Goede error = gpiod_direction_output(ts->gpiod_rst, 0); 753209bda47SHans de Goede if (error) 754209bda47SHans de Goede goto error; 755209bda47SHans de Goede 756209bda47SHans de Goede msleep(20); /* T2: > 10ms */ 757209bda47SHans de Goede 758209bda47SHans de Goede /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */ 759209bda47SHans de Goede error = goodix_irq_direction_output(ts, ts->client->addr == 0x14); 760209bda47SHans de Goede if (error) 761209bda47SHans de Goede goto error; 762209bda47SHans de Goede 763209bda47SHans de Goede usleep_range(100, 2000); /* T3: > 100us */ 764209bda47SHans de Goede 765209bda47SHans de Goede error = gpiod_direction_output(ts->gpiod_rst, 1); 766209bda47SHans de Goede if (error) 767209bda47SHans de Goede goto error; 768209bda47SHans de Goede 769209bda47SHans de Goede usleep_range(6000, 10000); /* T4: > 5ms */ 770209bda47SHans de Goede 771209bda47SHans de Goede /* end select I2C slave addr */ 772209bda47SHans de Goede error = gpiod_direction_input(ts->gpiod_rst); 773209bda47SHans de Goede if (error) 774209bda47SHans de Goede goto error; 775209bda47SHans de Goede 776209bda47SHans de Goede return 0; 777209bda47SHans de Goede 778209bda47SHans de Goede error: 779209bda47SHans de Goede dev_err(&ts->client->dev, "Controller reset failed.\n"); 780209bda47SHans de Goede return error; 781ec6e1b40SIrina Tirdea } 782ec6e1b40SIrina Tirdea 783ec6e1b40SIrina Tirdea /** 784ec6e1b40SIrina Tirdea * goodix_reset - Reset device during power on 785ec6e1b40SIrina Tirdea * 786ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 787ec6e1b40SIrina Tirdea */ 788ec6e1b40SIrina Tirdea static int goodix_reset(struct goodix_ts_data *ts) 789ec6e1b40SIrina Tirdea { 790ec6e1b40SIrina Tirdea int error; 791ec6e1b40SIrina Tirdea 792209bda47SHans de Goede error = goodix_reset_no_int_sync(ts); 793ec6e1b40SIrina Tirdea if (error) 794ec6e1b40SIrina Tirdea return error; 795ec6e1b40SIrina Tirdea 796209bda47SHans de Goede return goodix_int_sync(ts); 797ec6e1b40SIrina Tirdea } 798ec6e1b40SIrina Tirdea 799c9c20ee3SHans de Goede #ifdef ACPI_GPIO_SUPPORT 80067abd9eeSHans de Goede #include <asm/cpu_device_id.h> 80167abd9eeSHans de Goede #include <asm/intel-family.h> 80267abd9eeSHans de Goede 80367abd9eeSHans de Goede static const struct x86_cpu_id baytrail_cpu_ids[] = { 80467abd9eeSHans de Goede { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT, X86_FEATURE_ANY, }, 80567abd9eeSHans de Goede {} 80667abd9eeSHans de Goede }; 80767abd9eeSHans de Goede 80867abd9eeSHans de Goede static inline bool is_byt(void) 80967abd9eeSHans de Goede { 81067abd9eeSHans de Goede const struct x86_cpu_id *id = x86_match_cpu(baytrail_cpu_ids); 81167abd9eeSHans de Goede 81267abd9eeSHans de Goede return !!id; 81367abd9eeSHans de Goede } 81467abd9eeSHans de Goede 815a7d4b171SHans de Goede static const struct acpi_gpio_params first_gpio = { 0, 0, false }; 816a7d4b171SHans de Goede static const struct acpi_gpio_params second_gpio = { 1, 0, false }; 817a7d4b171SHans de Goede 818a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_first_gpios[] = { 819a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &first_gpio, 1 }, 820a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &second_gpio, 1 }, 821a7d4b171SHans de Goede { }, 822a7d4b171SHans de Goede }; 823a7d4b171SHans de Goede 824a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_last_gpios[] = { 825a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 826a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &second_gpio, 1 }, 827a7d4b171SHans de Goede { }, 828a7d4b171SHans de Goede }; 829a7d4b171SHans de Goede 830c5fca485SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_reset_only_gpios[] = { 831c5fca485SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 832c5fca485SHans de Goede { }, 833c5fca485SHans de Goede }; 834c5fca485SHans de Goede 835a7d4b171SHans de Goede static int goodix_resource(struct acpi_resource *ares, void *data) 836a7d4b171SHans de Goede { 837a7d4b171SHans de Goede struct goodix_ts_data *ts = data; 838a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 839a7d4b171SHans de Goede struct acpi_resource_gpio *gpio; 840a7d4b171SHans de Goede 841a7d4b171SHans de Goede switch (ares->type) { 842a7d4b171SHans de Goede case ACPI_RESOURCE_TYPE_GPIO: 843a7d4b171SHans de Goede gpio = &ares->data.gpio; 844a7d4b171SHans de Goede if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { 845a7d4b171SHans de Goede if (ts->gpio_int_idx == -1) { 846a7d4b171SHans de Goede ts->gpio_int_idx = ts->gpio_count; 847a7d4b171SHans de Goede } else { 848a7d4b171SHans de Goede dev_err(dev, "More then one GpioInt resource, ignoring ACPI GPIO resources\n"); 849a7d4b171SHans de Goede ts->gpio_int_idx = -2; 850a7d4b171SHans de Goede } 851a7d4b171SHans de Goede } 852a7d4b171SHans de Goede ts->gpio_count++; 853a7d4b171SHans de Goede break; 854a7d4b171SHans de Goede default: 855a7d4b171SHans de Goede break; 856a7d4b171SHans de Goede } 857a7d4b171SHans de Goede 858a7d4b171SHans de Goede return 0; 859a7d4b171SHans de Goede } 860a7d4b171SHans de Goede 861a7d4b171SHans de Goede /* 862a7d4b171SHans de Goede * This function gets called in case we fail to get the irq GPIO directly 863a7d4b171SHans de Goede * because the ACPI tables lack GPIO-name to APCI _CRS index mappings 864a7d4b171SHans de Goede * (no _DSD UUID daffd814-6eba-4d8c-8a91-bc9bbf4aa301 data). 865a7d4b171SHans de Goede * In that case we add our own mapping and then goodix_get_gpio_config() 866a7d4b171SHans de Goede * retries to get the GPIOs based on the added mapping. 867a7d4b171SHans de Goede */ 868a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 869a7d4b171SHans de Goede { 870a7d4b171SHans de Goede const struct acpi_gpio_mapping *gpio_mapping = NULL; 871a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 872a7d4b171SHans de Goede LIST_HEAD(resources); 873a7d4b171SHans de Goede int ret; 874a7d4b171SHans de Goede 875a7d4b171SHans de Goede ts->gpio_count = 0; 876a7d4b171SHans de Goede ts->gpio_int_idx = -1; 877a7d4b171SHans de Goede ret = acpi_dev_get_resources(ACPI_COMPANION(dev), &resources, 878a7d4b171SHans de Goede goodix_resource, ts); 879a7d4b171SHans de Goede if (ret < 0) { 880a7d4b171SHans de Goede dev_err(dev, "Error getting ACPI resources: %d\n", ret); 881a7d4b171SHans de Goede return ret; 882a7d4b171SHans de Goede } 883a7d4b171SHans de Goede 884a7d4b171SHans de Goede acpi_dev_free_resource_list(&resources); 885a7d4b171SHans de Goede 886a7d4b171SHans de Goede if (ts->gpio_count == 2 && ts->gpio_int_idx == 0) { 887a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 888a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_first_gpios; 889a7d4b171SHans de Goede } else if (ts->gpio_count == 2 && ts->gpio_int_idx == 1) { 890a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 891a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_last_gpios; 892c5fca485SHans de Goede } else if (ts->gpio_count == 1 && ts->gpio_int_idx == -1 && 893c5fca485SHans de Goede acpi_has_method(ACPI_HANDLE(dev), "INTI") && 894c5fca485SHans de Goede acpi_has_method(ACPI_HANDLE(dev), "INTO")) { 895c5fca485SHans de Goede dev_info(dev, "Using ACPI INTI and INTO methods for IRQ pin access\n"); 896c5fca485SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_METHOD; 897c5fca485SHans de Goede gpio_mapping = acpi_goodix_reset_only_gpios; 89867abd9eeSHans de Goede } else if (is_byt() && ts->gpio_count == 2 && ts->gpio_int_idx == -1) { 89967abd9eeSHans de Goede dev_info(dev, "No ACPI GpioInt resource, assuming that the GPIO order is reset, int\n"); 90067abd9eeSHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 90167abd9eeSHans de Goede gpio_mapping = acpi_goodix_int_last_gpios; 902a7d4b171SHans de Goede } else { 903a7d4b171SHans de Goede dev_warn(dev, "Unexpected ACPI resources: gpio_count %d, gpio_int_idx %d\n", 904a7d4b171SHans de Goede ts->gpio_count, ts->gpio_int_idx); 905a7d4b171SHans de Goede return -EINVAL; 906a7d4b171SHans de Goede } 907a7d4b171SHans de Goede 908a7d4b171SHans de Goede return devm_acpi_dev_add_driver_gpios(dev, gpio_mapping); 909a7d4b171SHans de Goede } 910a7d4b171SHans de Goede #else 911a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 912a7d4b171SHans de Goede { 913a7d4b171SHans de Goede return -EINVAL; 914a7d4b171SHans de Goede } 915a7d4b171SHans de Goede #endif /* CONFIG_X86 && CONFIG_ACPI */ 916a7d4b171SHans de Goede 917ec6e1b40SIrina Tirdea /** 918ec6e1b40SIrina Tirdea * goodix_get_gpio_config - Get GPIO config from ACPI/DT 919ec6e1b40SIrina Tirdea * 920ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 921ec6e1b40SIrina Tirdea */ 922ec6e1b40SIrina Tirdea static int goodix_get_gpio_config(struct goodix_ts_data *ts) 923ec6e1b40SIrina Tirdea { 924ec6e1b40SIrina Tirdea int error; 925ec6e1b40SIrina Tirdea struct device *dev; 926ec6e1b40SIrina Tirdea struct gpio_desc *gpiod; 927a7d4b171SHans de Goede bool added_acpi_mappings = false; 928ec6e1b40SIrina Tirdea 929ec6e1b40SIrina Tirdea if (!ts->client) 930ec6e1b40SIrina Tirdea return -EINVAL; 931ec6e1b40SIrina Tirdea dev = &ts->client->dev; 932ec6e1b40SIrina Tirdea 933ae97fb58SJagan Teki ts->avdd28 = devm_regulator_get(dev, "AVDD28"); 934ae97fb58SJagan Teki if (IS_ERR(ts->avdd28)) { 935ae97fb58SJagan Teki error = PTR_ERR(ts->avdd28); 936ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 937ae97fb58SJagan Teki dev_err(dev, 938ae97fb58SJagan Teki "Failed to get AVDD28 regulator: %d\n", error); 939ae97fb58SJagan Teki return error; 940ae97fb58SJagan Teki } 941ae97fb58SJagan Teki 942ae97fb58SJagan Teki ts->vddio = devm_regulator_get(dev, "VDDIO"); 943ae97fb58SJagan Teki if (IS_ERR(ts->vddio)) { 944ae97fb58SJagan Teki error = PTR_ERR(ts->vddio); 945ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 946ae97fb58SJagan Teki dev_err(dev, 947ae97fb58SJagan Teki "Failed to get VDDIO regulator: %d\n", error); 948ae97fb58SJagan Teki return error; 949ae97fb58SJagan Teki } 950ae97fb58SJagan Teki 951a7d4b171SHans de Goede retry_get_irq_gpio: 952ec6e1b40SIrina Tirdea /* Get the interrupt GPIO pin number */ 953ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN); 954ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 955ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 956ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 957ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 958ec6e1b40SIrina Tirdea GOODIX_GPIO_INT_NAME, error); 959ec6e1b40SIrina Tirdea return error; 960ec6e1b40SIrina Tirdea } 961a7d4b171SHans de Goede if (!gpiod && has_acpi_companion(dev) && !added_acpi_mappings) { 962a7d4b171SHans de Goede added_acpi_mappings = true; 963a7d4b171SHans de Goede if (goodix_add_acpi_gpio_mappings(ts) == 0) 964a7d4b171SHans de Goede goto retry_get_irq_gpio; 965a7d4b171SHans de Goede } 966ec6e1b40SIrina Tirdea 967ec6e1b40SIrina Tirdea ts->gpiod_int = gpiod; 968ec6e1b40SIrina Tirdea 969ec6e1b40SIrina Tirdea /* Get the reset line GPIO pin number */ 970ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, GPIOD_IN); 971ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 972ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 973ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 974ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 975ec6e1b40SIrina Tirdea GOODIX_GPIO_RST_NAME, error); 976ec6e1b40SIrina Tirdea return error; 977ec6e1b40SIrina Tirdea } 978ec6e1b40SIrina Tirdea 979ec6e1b40SIrina Tirdea ts->gpiod_rst = gpiod; 980ec6e1b40SIrina Tirdea 981a7d4b171SHans de Goede switch (ts->irq_pin_access_method) { 982a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 983a7d4b171SHans de Goede /* 984a7d4b171SHans de Goede * We end up here if goodix_add_acpi_gpio_mappings() has 985a7d4b171SHans de Goede * called devm_acpi_dev_add_driver_gpios() because the ACPI 986a7d4b171SHans de Goede * tables did not contain name to index mappings. 987a7d4b171SHans de Goede * Check that we successfully got both GPIOs after we've 988a7d4b171SHans de Goede * added our own acpi_gpio_mapping and if we did not get both 989a7d4b171SHans de Goede * GPIOs reset irq_pin_access_method to IRQ_PIN_ACCESS_NONE. 990a7d4b171SHans de Goede */ 991a7d4b171SHans de Goede if (!ts->gpiod_int || !ts->gpiod_rst) 992a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 993a7d4b171SHans de Goede break; 994c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 995c5fca485SHans de Goede if (!ts->gpiod_rst) 996c5fca485SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 997c5fca485SHans de Goede break; 998a7d4b171SHans de Goede default: 999e070a97bSHans de Goede if (ts->gpiod_int && ts->gpiod_rst) { 10001921daceSHans de Goede ts->reset_controller_at_probe = true; 1001e070a97bSHans de Goede ts->load_cfg_from_disk = true; 100249db3997SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_GPIO; 1003e070a97bSHans de Goede } 1004a7d4b171SHans de Goede } 100549db3997SHans de Goede 1006ec6e1b40SIrina Tirdea return 0; 1007ec6e1b40SIrina Tirdea } 1008ec6e1b40SIrina Tirdea 1009ca96ea86SBastien Nocera /** 1010ca96ea86SBastien Nocera * goodix_read_config - Read the embedded configuration of the panel 1011ca96ea86SBastien Nocera * 1012ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 1013ca96ea86SBastien Nocera * 1014ca96ea86SBastien Nocera * Must be called during probe 1015ca96ea86SBastien Nocera */ 1016ca96ea86SBastien Nocera static void goodix_read_config(struct goodix_ts_data *ts) 1017ca96ea86SBastien Nocera { 1018fafef982SMarcin Niestroj int x_max, y_max; 1019ca96ea86SBastien Nocera int error; 1020ca96ea86SBastien Nocera 102109182ed2SHans de Goede /* 102209182ed2SHans de Goede * On controllers where we need to upload the firmware 102309182ed2SHans de Goede * (controllers without flash) ts->config already has the config 102409182ed2SHans de Goede * at this point and the controller itself does not have it yet! 102509182ed2SHans de Goede */ 102609182ed2SHans de Goede if (!ts->firmware_name) { 102725309004SMarcin Niestroj error = goodix_i2c_read(ts->client, ts->chip->config_addr, 1028de956caeSHans de Goede ts->config, ts->chip->config_len); 1029ca96ea86SBastien Nocera if (error) { 1030ca96ea86SBastien Nocera ts->int_trigger_type = GOODIX_INT_TRIGGER; 1031a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 1032ca96ea86SBastien Nocera return; 1033ca96ea86SBastien Nocera } 103409182ed2SHans de Goede } 1035ca96ea86SBastien Nocera 1036de956caeSHans de Goede ts->int_trigger_type = ts->config[TRIGGER_LOC] & 0x03; 1037de956caeSHans de Goede ts->max_touch_num = ts->config[MAX_CONTACTS_LOC] & 0x0f; 10388b5a359cSBastien Nocera 1039de956caeSHans de Goede x_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC]); 1040de956caeSHans de Goede y_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC + 2]); 1041fafef982SMarcin Niestroj if (x_max && y_max) { 1042fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_X, x_max - 1); 1043fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_Y, y_max - 1); 1044ca96ea86SBastien Nocera } 1045de956caeSHans de Goede 1046de956caeSHans de Goede ts->chip->calc_config_checksum(ts); 104757c80e8eSKarsten Merker } 1048ca96ea86SBastien Nocera 1049ca96ea86SBastien Nocera /** 1050ca96ea86SBastien Nocera * goodix_read_version - Read goodix touchscreen version 1051ca96ea86SBastien Nocera * 105268caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 1053ca96ea86SBastien Nocera */ 105468caf858SIrina Tirdea static int goodix_read_version(struct goodix_ts_data *ts) 1055ca96ea86SBastien Nocera { 1056ca96ea86SBastien Nocera int error; 1057ca96ea86SBastien Nocera u8 buf[6]; 1058cae102e2SIcenowy Zheng char id_str[GOODIX_ID_MAX_LEN + 1]; 1059ca96ea86SBastien Nocera 106068caf858SIrina Tirdea error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf)); 10617642f29cSHans de Goede if (error) 1062ca96ea86SBastien Nocera return error; 1063ca96ea86SBastien Nocera 1064cae102e2SIcenowy Zheng memcpy(id_str, buf, GOODIX_ID_MAX_LEN); 1065cae102e2SIcenowy Zheng id_str[GOODIX_ID_MAX_LEN] = 0; 1066cae102e2SIcenowy Zheng strscpy(ts->id, id_str, GOODIX_ID_MAX_LEN + 1); 1067e70b0307SIrina Tirdea 106868caf858SIrina Tirdea ts->version = get_unaligned_le16(&buf[4]); 1069ca96ea86SBastien Nocera 1070cae102e2SIcenowy Zheng dev_info(&ts->client->dev, "ID %s, version: %04x\n", ts->id, 107168caf858SIrina Tirdea ts->version); 1072ca96ea86SBastien Nocera 1073ca96ea86SBastien Nocera return 0; 1074ca96ea86SBastien Nocera } 1075ca96ea86SBastien Nocera 1076ca96ea86SBastien Nocera /** 1077ca96ea86SBastien Nocera * goodix_i2c_test - I2C test function to check if the device answers. 1078ca96ea86SBastien Nocera * 1079ca96ea86SBastien Nocera * @client: the i2c client 1080ca96ea86SBastien Nocera */ 1081ca96ea86SBastien Nocera static int goodix_i2c_test(struct i2c_client *client) 1082ca96ea86SBastien Nocera { 1083ca96ea86SBastien Nocera int retry = 0; 1084ca96ea86SBastien Nocera int error; 1085ca96ea86SBastien Nocera u8 test; 1086ca96ea86SBastien Nocera 1087ca96ea86SBastien Nocera while (retry++ < 2) { 10887642f29cSHans de Goede error = goodix_i2c_read(client, GOODIX_REG_ID, &test, 1); 1089ca96ea86SBastien Nocera if (!error) 1090ca96ea86SBastien Nocera return 0; 1091ca96ea86SBastien Nocera 1092ca96ea86SBastien Nocera msleep(20); 1093ca96ea86SBastien Nocera } 1094ca96ea86SBastien Nocera 1095ca96ea86SBastien Nocera return error; 1096ca96ea86SBastien Nocera } 1097ca96ea86SBastien Nocera 1098ca96ea86SBastien Nocera /** 109968caf858SIrina Tirdea * goodix_configure_dev - Finish device initialization 110068caf858SIrina Tirdea * 110168caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 110268caf858SIrina Tirdea * 110368caf858SIrina Tirdea * Must be called from probe to finish initialization of the device. 110468caf858SIrina Tirdea * Contains the common initialization code for both devices that 110568caf858SIrina Tirdea * declare gpio pins and devices that do not. It is either called 110668caf858SIrina Tirdea * directly from probe or from request_firmware_wait callback. 110768caf858SIrina Tirdea */ 110868caf858SIrina Tirdea static int goodix_configure_dev(struct goodix_ts_data *ts) 110968caf858SIrina Tirdea { 111068caf858SIrina Tirdea int error; 1111492ee52cSDmitry Mastykin int i; 111268caf858SIrina Tirdea 1113fafef982SMarcin Niestroj ts->int_trigger_type = GOODIX_INT_TRIGGER; 1114fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 1115ad48cf5eSKarsten Merker 1116fafef982SMarcin Niestroj ts->input_dev = devm_input_allocate_device(&ts->client->dev); 1117fafef982SMarcin Niestroj if (!ts->input_dev) { 1118fafef982SMarcin Niestroj dev_err(&ts->client->dev, "Failed to allocate input device."); 1119fafef982SMarcin Niestroj return -ENOMEM; 1120fafef982SMarcin Niestroj } 1121fafef982SMarcin Niestroj 1122fafef982SMarcin Niestroj ts->input_dev->name = "Goodix Capacitive TouchScreen"; 1123fafef982SMarcin Niestroj ts->input_dev->phys = "input/ts"; 1124fafef982SMarcin Niestroj ts->input_dev->id.bustype = BUS_I2C; 1125fafef982SMarcin Niestroj ts->input_dev->id.vendor = 0x0416; 1126cae102e2SIcenowy Zheng if (kstrtou16(ts->id, 10, &ts->input_dev->id.product)) 1127cae102e2SIcenowy Zheng ts->input_dev->id.product = 0x1001; 1128fafef982SMarcin Niestroj ts->input_dev->id.version = ts->version; 1129fafef982SMarcin Niestroj 1130492ee52cSDmitry Mastykin ts->input_dev->keycode = ts->keymap; 1131492ee52cSDmitry Mastykin ts->input_dev->keycodesize = sizeof(ts->keymap[0]); 1132492ee52cSDmitry Mastykin ts->input_dev->keycodemax = GOODIX_MAX_KEYS; 1133492ee52cSDmitry Mastykin 1134fafef982SMarcin Niestroj /* Capacitive Windows/Home button on some devices */ 1135492ee52cSDmitry Mastykin for (i = 0; i < GOODIX_MAX_KEYS; ++i) { 1136492ee52cSDmitry Mastykin if (i == 0) 1137492ee52cSDmitry Mastykin ts->keymap[i] = KEY_LEFTMETA; 1138492ee52cSDmitry Mastykin else 1139492ee52cSDmitry Mastykin ts->keymap[i] = KEY_F1 + (i - 1); 1140492ee52cSDmitry Mastykin 1141492ee52cSDmitry Mastykin input_set_capability(ts->input_dev, EV_KEY, ts->keymap[i]); 1142492ee52cSDmitry Mastykin } 1143fafef982SMarcin Niestroj 1144fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X); 1145fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y); 1146fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 1147fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 1148fafef982SMarcin Niestroj 1149fafef982SMarcin Niestroj /* Read configuration and apply touchscreen parameters */ 115068caf858SIrina Tirdea goodix_read_config(ts); 115168caf858SIrina Tirdea 1152fafef982SMarcin Niestroj /* Try overriding touchscreen parameters via device properties */ 1153fafef982SMarcin Niestroj touchscreen_parse_properties(ts->input_dev, true, &ts->prop); 1154fafef982SMarcin Niestroj 1155fafef982SMarcin Niestroj if (!ts->prop.max_x || !ts->prop.max_y || !ts->max_touch_num) { 1156c1c00aa5SGuido Günther dev_err(&ts->client->dev, 1157c1c00aa5SGuido Günther "Invalid config (%d, %d, %d), using defaults\n", 1158c1c00aa5SGuido Günther ts->prop.max_x, ts->prop.max_y, ts->max_touch_num); 1159fafef982SMarcin Niestroj ts->prop.max_x = GOODIX_MAX_WIDTH - 1; 1160fafef982SMarcin Niestroj ts->prop.max_y = GOODIX_MAX_HEIGHT - 1; 1161fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 1162fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 1163fafef982SMarcin Niestroj ABS_MT_POSITION_X, ts->prop.max_x); 1164fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 1165fafef982SMarcin Niestroj ABS_MT_POSITION_Y, ts->prop.max_y); 1166fafef982SMarcin Niestroj } 1167fafef982SMarcin Niestroj 1168bd3b8480SYauhen Kharuzhy if (dmi_check_system(nine_bytes_report)) { 1169bd3b8480SYauhen Kharuzhy ts->contact_size = 9; 1170bd3b8480SYauhen Kharuzhy 1171bd3b8480SYauhen Kharuzhy dev_dbg(&ts->client->dev, 1172bd3b8480SYauhen Kharuzhy "Non-standard 9-bytes report format quirk\n"); 1173bd3b8480SYauhen Kharuzhy } 1174bd3b8480SYauhen Kharuzhy 11751dd5ddc1SSergei A. Trusov if (dmi_check_system(inverted_x_screen)) { 11761dd5ddc1SSergei A. Trusov ts->prop.invert_x = true; 11771dd5ddc1SSergei A. Trusov dev_dbg(&ts->client->dev, 11781dd5ddc1SSergei A. Trusov "Applying 'inverted x screen' quirk\n"); 11791dd5ddc1SSergei A. Trusov } 11801dd5ddc1SSergei A. Trusov 1181fafef982SMarcin Niestroj error = input_mt_init_slots(ts->input_dev, ts->max_touch_num, 1182fafef982SMarcin Niestroj INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); 1183fafef982SMarcin Niestroj if (error) { 1184fafef982SMarcin Niestroj dev_err(&ts->client->dev, 1185fafef982SMarcin Niestroj "Failed to initialize MT slots: %d", error); 118668caf858SIrina Tirdea return error; 1187fafef982SMarcin Niestroj } 1188fafef982SMarcin Niestroj 1189fafef982SMarcin Niestroj error = input_register_device(ts->input_dev); 1190fafef982SMarcin Niestroj if (error) { 1191fafef982SMarcin Niestroj dev_err(&ts->client->dev, 1192fafef982SMarcin Niestroj "Failed to register input device: %d", error); 1193fafef982SMarcin Niestroj return error; 1194fafef982SMarcin Niestroj } 119568caf858SIrina Tirdea 11965ab09d6aSIrina Tirdea ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT; 11975ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 119868caf858SIrina Tirdea if (error) { 119968caf858SIrina Tirdea dev_err(&ts->client->dev, "request IRQ failed: %d\n", error); 120068caf858SIrina Tirdea return error; 120168caf858SIrina Tirdea } 120268caf858SIrina Tirdea 120368caf858SIrina Tirdea return 0; 120468caf858SIrina Tirdea } 120568caf858SIrina Tirdea 120668caf858SIrina Tirdea /** 120768caf858SIrina Tirdea * goodix_config_cb - Callback to finish device init 120868caf858SIrina Tirdea * 1209cb690465SLee Jones * @cfg: firmware config 1210584da78cSLee Jones * @ctx: our goodix_ts_data pointer 121168caf858SIrina Tirdea * 121268caf858SIrina Tirdea * request_firmware_wait callback that finishes 121368caf858SIrina Tirdea * initialization of the device. 121468caf858SIrina Tirdea */ 121568caf858SIrina Tirdea static void goodix_config_cb(const struct firmware *cfg, void *ctx) 121668caf858SIrina Tirdea { 121768caf858SIrina Tirdea struct goodix_ts_data *ts = ctx; 121868caf858SIrina Tirdea int error; 121968caf858SIrina Tirdea 122009182ed2SHans de Goede if (ts->firmware_name) { 122109182ed2SHans de Goede if (!cfg) 122209182ed2SHans de Goede goto err_release_cfg; 122309182ed2SHans de Goede 122409182ed2SHans de Goede error = goodix_check_cfg(ts, cfg->data, cfg->size); 122509182ed2SHans de Goede if (error) 122609182ed2SHans de Goede goto err_release_cfg; 122709182ed2SHans de Goede 122809182ed2SHans de Goede memcpy(ts->config, cfg->data, cfg->size); 122909182ed2SHans de Goede } else if (cfg) { 123068caf858SIrina Tirdea /* send device configuration to the firmware */ 12311a67448fSHans de Goede error = goodix_send_cfg(ts, cfg->data, cfg->size); 123268caf858SIrina Tirdea if (error) 123368caf858SIrina Tirdea goto err_release_cfg; 123468caf858SIrina Tirdea } 123568caf858SIrina Tirdea 123668caf858SIrina Tirdea goodix_configure_dev(ts); 123768caf858SIrina Tirdea 123868caf858SIrina Tirdea err_release_cfg: 123968caf858SIrina Tirdea release_firmware(cfg); 124068caf858SIrina Tirdea complete_all(&ts->firmware_loading_complete); 124168caf858SIrina Tirdea } 124268caf858SIrina Tirdea 1243ae97fb58SJagan Teki static void goodix_disable_regulators(void *arg) 1244ae97fb58SJagan Teki { 1245ae97fb58SJagan Teki struct goodix_ts_data *ts = arg; 1246ae97fb58SJagan Teki 1247ae97fb58SJagan Teki regulator_disable(ts->vddio); 1248ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1249ae97fb58SJagan Teki } 1250ae97fb58SJagan Teki 1251ca96ea86SBastien Nocera static int goodix_ts_probe(struct i2c_client *client, 1252ca96ea86SBastien Nocera const struct i2c_device_id *id) 1253ca96ea86SBastien Nocera { 1254ca96ea86SBastien Nocera struct goodix_ts_data *ts; 125520e31722SHans de Goede const char *cfg_name; 1256ca96ea86SBastien Nocera int error; 1257ca96ea86SBastien Nocera 1258ca96ea86SBastien Nocera dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr); 1259ca96ea86SBastien Nocera 1260ca96ea86SBastien Nocera if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 1261ca96ea86SBastien Nocera dev_err(&client->dev, "I2C check functionality failed.\n"); 1262ca96ea86SBastien Nocera return -ENXIO; 1263ca96ea86SBastien Nocera } 1264ca96ea86SBastien Nocera 1265ca96ea86SBastien Nocera ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); 1266ca96ea86SBastien Nocera if (!ts) 1267ca96ea86SBastien Nocera return -ENOMEM; 1268ca96ea86SBastien Nocera 1269ca96ea86SBastien Nocera ts->client = client; 1270ca96ea86SBastien Nocera i2c_set_clientdata(client, ts); 127168caf858SIrina Tirdea init_completion(&ts->firmware_loading_complete); 1272bd3b8480SYauhen Kharuzhy ts->contact_size = GOODIX_CONTACT_SIZE; 1273ca96ea86SBastien Nocera 1274ec6e1b40SIrina Tirdea error = goodix_get_gpio_config(ts); 1275ec6e1b40SIrina Tirdea if (error) 1276ec6e1b40SIrina Tirdea return error; 1277ec6e1b40SIrina Tirdea 1278ae97fb58SJagan Teki /* power up the controller */ 1279ae97fb58SJagan Teki error = regulator_enable(ts->avdd28); 1280ae97fb58SJagan Teki if (error) { 1281ae97fb58SJagan Teki dev_err(&client->dev, 1282ae97fb58SJagan Teki "Failed to enable AVDD28 regulator: %d\n", 1283ae97fb58SJagan Teki error); 1284ae97fb58SJagan Teki return error; 1285ae97fb58SJagan Teki } 1286ae97fb58SJagan Teki 1287ae97fb58SJagan Teki error = regulator_enable(ts->vddio); 1288ae97fb58SJagan Teki if (error) { 1289ae97fb58SJagan Teki dev_err(&client->dev, 1290ae97fb58SJagan Teki "Failed to enable VDDIO regulator: %d\n", 1291ae97fb58SJagan Teki error); 1292ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1293ae97fb58SJagan Teki return error; 1294ae97fb58SJagan Teki } 1295ae97fb58SJagan Teki 1296ae97fb58SJagan Teki error = devm_add_action_or_reset(&client->dev, 1297ae97fb58SJagan Teki goodix_disable_regulators, ts); 1298ae97fb58SJagan Teki if (error) 1299ae97fb58SJagan Teki return error; 1300ae97fb58SJagan Teki 13019e1f2d70SHans de Goede reset: 13021921daceSHans de Goede if (ts->reset_controller_at_probe) { 1303ec6e1b40SIrina Tirdea /* reset the controller */ 1304ec6e1b40SIrina Tirdea error = goodix_reset(ts); 1305209bda47SHans de Goede if (error) 1306ec6e1b40SIrina Tirdea return error; 1307ec6e1b40SIrina Tirdea } 1308ec6e1b40SIrina Tirdea 1309ca96ea86SBastien Nocera error = goodix_i2c_test(client); 1310ca96ea86SBastien Nocera if (error) { 13119e1f2d70SHans de Goede if (!ts->reset_controller_at_probe && 13129e1f2d70SHans de Goede ts->irq_pin_access_method != IRQ_PIN_ACCESS_NONE) { 13139e1f2d70SHans de Goede /* Retry after a controller reset */ 13149e1f2d70SHans de Goede ts->reset_controller_at_probe = true; 13159e1f2d70SHans de Goede goto reset; 13169e1f2d70SHans de Goede } 1317ca96ea86SBastien Nocera dev_err(&client->dev, "I2C communication failure: %d\n", error); 1318ca96ea86SBastien Nocera return error; 1319ca96ea86SBastien Nocera } 1320ca96ea86SBastien Nocera 132109182ed2SHans de Goede error = goodix_firmware_check(ts); 132209182ed2SHans de Goede if (error) 132309182ed2SHans de Goede return error; 132409182ed2SHans de Goede 132568caf858SIrina Tirdea error = goodix_read_version(ts); 13267642f29cSHans de Goede if (error) 1327ca96ea86SBastien Nocera return error; 1328ca96ea86SBastien Nocera 132925309004SMarcin Niestroj ts->chip = goodix_get_chip_data(ts->id); 1330a779fbc6SIrina Tirdea 1331e070a97bSHans de Goede if (ts->load_cfg_from_disk) { 133268caf858SIrina Tirdea /* update device config */ 133320e31722SHans de Goede error = device_property_read_string(&client->dev, 133420e31722SHans de Goede "goodix,config-name", 133520e31722SHans de Goede &cfg_name); 133620e31722SHans de Goede if (!error) 133720e31722SHans de Goede snprintf(ts->cfg_name, sizeof(ts->cfg_name), 133820e31722SHans de Goede "goodix/%s", cfg_name); 133920e31722SHans de Goede else 134020e31722SHans de Goede snprintf(ts->cfg_name, sizeof(ts->cfg_name), 1341cae102e2SIcenowy Zheng "goodix_%s_cfg.bin", ts->id); 1342ca96ea86SBastien Nocera 134368caf858SIrina Tirdea error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name, 134468caf858SIrina Tirdea &client->dev, GFP_KERNEL, ts, 134568caf858SIrina Tirdea goodix_config_cb); 1346ca96ea86SBastien Nocera if (error) { 134768caf858SIrina Tirdea dev_err(&client->dev, 134868caf858SIrina Tirdea "Failed to invoke firmware loader: %d\n", 134968caf858SIrina Tirdea error); 1350ca96ea86SBastien Nocera return error; 1351ca96ea86SBastien Nocera } 1352ca96ea86SBastien Nocera 1353ca96ea86SBastien Nocera return 0; 135468caf858SIrina Tirdea } else { 135568caf858SIrina Tirdea error = goodix_configure_dev(ts); 135668caf858SIrina Tirdea if (error) 135768caf858SIrina Tirdea return error; 135868caf858SIrina Tirdea } 135968caf858SIrina Tirdea 136068caf858SIrina Tirdea return 0; 136168caf858SIrina Tirdea } 136268caf858SIrina Tirdea 136368caf858SIrina Tirdea static int goodix_ts_remove(struct i2c_client *client) 136468caf858SIrina Tirdea { 136568caf858SIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 136668caf858SIrina Tirdea 1367e070a97bSHans de Goede if (ts->load_cfg_from_disk) 136868caf858SIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 136968caf858SIrina Tirdea 137068caf858SIrina Tirdea return 0; 1371ca96ea86SBastien Nocera } 1372ca96ea86SBastien Nocera 13735ab09d6aSIrina Tirdea static int __maybe_unused goodix_suspend(struct device *dev) 13745ab09d6aSIrina Tirdea { 13755ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 13765ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 13775ab09d6aSIrina Tirdea int error; 13785ab09d6aSIrina Tirdea 1379e070a97bSHans de Goede if (ts->load_cfg_from_disk) 1380e070a97bSHans de Goede wait_for_completion(&ts->firmware_loading_complete); 1381e070a97bSHans de Goede 13825ab09d6aSIrina Tirdea /* We need gpio pins to suspend/resume */ 138349db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1384faec44b6SHans de Goede disable_irq(client->irq); 13855ab09d6aSIrina Tirdea return 0; 1386faec44b6SHans de Goede } 13875ab09d6aSIrina Tirdea 13885ab09d6aSIrina Tirdea /* Free IRQ as IRQ pin is used as output in the suspend sequence */ 13895ab09d6aSIrina Tirdea goodix_free_irq(ts); 13905ab09d6aSIrina Tirdea 139109182ed2SHans de Goede /* Save reference (calibration) info if necessary */ 139209182ed2SHans de Goede goodix_save_bak_ref(ts); 139309182ed2SHans de Goede 13945ab09d6aSIrina Tirdea /* Output LOW on the INT pin for 5 ms */ 139549db3997SHans de Goede error = goodix_irq_direction_output(ts, 0); 13965ab09d6aSIrina Tirdea if (error) { 13975ab09d6aSIrina Tirdea goodix_request_irq(ts); 13985ab09d6aSIrina Tirdea return error; 13995ab09d6aSIrina Tirdea } 14005ab09d6aSIrina Tirdea 14015ab09d6aSIrina Tirdea usleep_range(5000, 6000); 14025ab09d6aSIrina Tirdea 14035ab09d6aSIrina Tirdea error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND, 14045ab09d6aSIrina Tirdea GOODIX_CMD_SCREEN_OFF); 14055ab09d6aSIrina Tirdea if (error) { 140649db3997SHans de Goede goodix_irq_direction_input(ts); 14075ab09d6aSIrina Tirdea goodix_request_irq(ts); 14085ab09d6aSIrina Tirdea return -EAGAIN; 14095ab09d6aSIrina Tirdea } 14105ab09d6aSIrina Tirdea 14115ab09d6aSIrina Tirdea /* 14125ab09d6aSIrina Tirdea * The datasheet specifies that the interval between sending screen-off 14135ab09d6aSIrina Tirdea * command and wake-up should be longer than 58 ms. To avoid waking up 14145ab09d6aSIrina Tirdea * sooner, delay 58ms here. 14155ab09d6aSIrina Tirdea */ 14165ab09d6aSIrina Tirdea msleep(58); 14175ab09d6aSIrina Tirdea return 0; 14185ab09d6aSIrina Tirdea } 14195ab09d6aSIrina Tirdea 14205ab09d6aSIrina Tirdea static int __maybe_unused goodix_resume(struct device *dev) 14215ab09d6aSIrina Tirdea { 14225ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 14235ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 1424273ec6bdSHans de Goede u8 config_ver; 14255ab09d6aSIrina Tirdea int error; 14265ab09d6aSIrina Tirdea 142749db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1428faec44b6SHans de Goede enable_irq(client->irq); 14295ab09d6aSIrina Tirdea return 0; 1430faec44b6SHans de Goede } 14315ab09d6aSIrina Tirdea 14325ab09d6aSIrina Tirdea /* 14335ab09d6aSIrina Tirdea * Exit sleep mode by outputting HIGH level to INT pin 14345ab09d6aSIrina Tirdea * for 2ms~5ms. 14355ab09d6aSIrina Tirdea */ 143649db3997SHans de Goede error = goodix_irq_direction_output(ts, 1); 14375ab09d6aSIrina Tirdea if (error) 14385ab09d6aSIrina Tirdea return error; 14395ab09d6aSIrina Tirdea 14405ab09d6aSIrina Tirdea usleep_range(2000, 5000); 14415ab09d6aSIrina Tirdea 14425ab09d6aSIrina Tirdea error = goodix_int_sync(ts); 14435ab09d6aSIrina Tirdea if (error) 14445ab09d6aSIrina Tirdea return error; 14455ab09d6aSIrina Tirdea 1446273ec6bdSHans de Goede error = goodix_i2c_read(ts->client, ts->chip->config_addr, 1447273ec6bdSHans de Goede &config_ver, 1); 14487642f29cSHans de Goede if (!error && config_ver != ts->config[0]) 1449273ec6bdSHans de Goede dev_info(dev, "Config version mismatch %d != %d, resetting controller\n", 1450273ec6bdSHans de Goede config_ver, ts->config[0]); 1451273ec6bdSHans de Goede 1452273ec6bdSHans de Goede if (error != 0 || config_ver != ts->config[0]) { 1453273ec6bdSHans de Goede error = goodix_reset(ts); 1454209bda47SHans de Goede if (error) 1455273ec6bdSHans de Goede return error; 1456273ec6bdSHans de Goede 1457273ec6bdSHans de Goede error = goodix_send_cfg(ts, ts->config, ts->chip->config_len); 1458273ec6bdSHans de Goede if (error) 1459273ec6bdSHans de Goede return error; 1460273ec6bdSHans de Goede } 1461273ec6bdSHans de Goede 14625ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 14635ab09d6aSIrina Tirdea if (error) 14645ab09d6aSIrina Tirdea return error; 14655ab09d6aSIrina Tirdea 14665ab09d6aSIrina Tirdea return 0; 14675ab09d6aSIrina Tirdea } 14685ab09d6aSIrina Tirdea 14695ab09d6aSIrina Tirdea static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume); 14705ab09d6aSIrina Tirdea 1471ca96ea86SBastien Nocera static const struct i2c_device_id goodix_ts_id[] = { 1472ca96ea86SBastien Nocera { "GDIX1001:00", 0 }, 1473ca96ea86SBastien Nocera { } 1474ca96ea86SBastien Nocera }; 14752e9e910eSJavier Martinez Canillas MODULE_DEVICE_TABLE(i2c, goodix_ts_id); 1476ca96ea86SBastien Nocera 1477771d8f1bSAleksei Mamlin #ifdef CONFIG_ACPI 1478ca96ea86SBastien Nocera static const struct acpi_device_id goodix_acpi_match[] = { 1479ca96ea86SBastien Nocera { "GDIX1001", 0 }, 14805ca4d1aeSEthan Lee { "GDIX1002", 0 }, 1481ca96ea86SBastien Nocera { } 1482ca96ea86SBastien Nocera }; 1483ca96ea86SBastien Nocera MODULE_DEVICE_TABLE(acpi, goodix_acpi_match); 1484771d8f1bSAleksei Mamlin #endif 1485771d8f1bSAleksei Mamlin 1486771d8f1bSAleksei Mamlin #ifdef CONFIG_OF 1487771d8f1bSAleksei Mamlin static const struct of_device_id goodix_of_match[] = { 148825309004SMarcin Niestroj { .compatible = "goodix,gt1151" }, 1489a5f50c50SJagan Teki { .compatible = "goodix,gt5663" }, 149084ef1b33SGuido Günther { .compatible = "goodix,gt5688" }, 1491771d8f1bSAleksei Mamlin { .compatible = "goodix,gt911" }, 1492771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9110" }, 1493771d8f1bSAleksei Mamlin { .compatible = "goodix,gt912" }, 1494b9a1c116SYannick Fertre { .compatible = "goodix,gt9147" }, 1495b5e458afSIcenowy Zheng { .compatible = "goodix,gt917s" }, 1496771d8f1bSAleksei Mamlin { .compatible = "goodix,gt927" }, 1497771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9271" }, 1498771d8f1bSAleksei Mamlin { .compatible = "goodix,gt928" }, 14992dce6db7SAngeloGioacchino Del Regno { .compatible = "goodix,gt9286" }, 1500771d8f1bSAleksei Mamlin { .compatible = "goodix,gt967" }, 1501771d8f1bSAleksei Mamlin { } 1502771d8f1bSAleksei Mamlin }; 1503771d8f1bSAleksei Mamlin MODULE_DEVICE_TABLE(of, goodix_of_match); 1504771d8f1bSAleksei Mamlin #endif 1505ca96ea86SBastien Nocera 1506ca96ea86SBastien Nocera static struct i2c_driver goodix_ts_driver = { 1507ca96ea86SBastien Nocera .probe = goodix_ts_probe, 150868caf858SIrina Tirdea .remove = goodix_ts_remove, 1509ca96ea86SBastien Nocera .id_table = goodix_ts_id, 1510ca96ea86SBastien Nocera .driver = { 1511ca96ea86SBastien Nocera .name = "Goodix-TS", 1512771d8f1bSAleksei Mamlin .acpi_match_table = ACPI_PTR(goodix_acpi_match), 1513771d8f1bSAleksei Mamlin .of_match_table = of_match_ptr(goodix_of_match), 15145ab09d6aSIrina Tirdea .pm = &goodix_pm_ops, 1515ca96ea86SBastien Nocera }, 1516ca96ea86SBastien Nocera }; 1517ca96ea86SBastien Nocera module_i2c_driver(goodix_ts_driver); 1518ca96ea86SBastien Nocera 1519ca96ea86SBastien Nocera MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); 1520ca96ea86SBastien Nocera MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>"); 1521ca96ea86SBastien Nocera MODULE_DESCRIPTION("Goodix touchscreen driver"); 1522ca96ea86SBastien Nocera MODULE_LICENSE("GPL v2"); 1523