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> 21d176708fSHans de Goede #include <linux/platform_data/x86/soc.h> 22ca96ea86SBastien Nocera #include <linux/slab.h> 23771d8f1bSAleksei Mamlin #include <linux/acpi.h> 24771d8f1bSAleksei Mamlin #include <linux/of.h> 25ca96ea86SBastien Nocera #include <asm/unaligned.h> 26a2233cb7SHans de Goede #include "goodix.h" 27ca96ea86SBastien Nocera 28aebfc52cSHans de Goede #define GOODIX_GPIO_INT_NAME "irq" 29aebfc52cSHans de Goede #define GOODIX_GPIO_RST_NAME "reset" 30aebfc52cSHans de Goede 31aebfc52cSHans de Goede #define GOODIX_MAX_HEIGHT 4096 32aebfc52cSHans de Goede #define GOODIX_MAX_WIDTH 4096 33aebfc52cSHans de Goede #define GOODIX_INT_TRIGGER 1 34aebfc52cSHans de Goede #define GOODIX_CONTACT_SIZE 8 35aebfc52cSHans de Goede #define GOODIX_MAX_CONTACT_SIZE 9 36aebfc52cSHans de Goede #define GOODIX_MAX_CONTACTS 10 37aebfc52cSHans de Goede 38686e8a24SHans de Goede #define GOODIX_CONFIG_MIN_LENGTH 186 39aebfc52cSHans de Goede #define GOODIX_CONFIG_911_LENGTH 186 40aebfc52cSHans de Goede #define GOODIX_CONFIG_967_LENGTH 228 41686e8a24SHans de Goede #define GOODIX_CONFIG_GT9X_LENGTH 240 42aebfc52cSHans de Goede 43aebfc52cSHans de Goede #define GOODIX_BUFFER_STATUS_READY BIT(7) 44492ee52cSDmitry Mastykin #define GOODIX_HAVE_KEY BIT(4) 45aebfc52cSHans de Goede #define GOODIX_BUFFER_STATUS_TIMEOUT 20 46aebfc52cSHans de Goede 47aebfc52cSHans de Goede #define RESOLUTION_LOC 1 48aebfc52cSHans de Goede #define MAX_CONTACTS_LOC 5 49aebfc52cSHans de Goede #define TRIGGER_LOC 6 50aebfc52cSHans de Goede 51c9c20ee3SHans de Goede /* Our special handling for GPIO accesses through ACPI is x86 specific */ 52c9c20ee3SHans de Goede #if defined CONFIG_X86 && defined CONFIG_ACPI 53c9c20ee3SHans de Goede #define ACPI_GPIO_SUPPORT 54c9c20ee3SHans de Goede #endif 55c9c20ee3SHans de Goede 56cae102e2SIcenowy Zheng struct goodix_chip_id { 57cae102e2SIcenowy Zheng const char *id; 58cae102e2SIcenowy Zheng const struct goodix_chip_data *data; 59cae102e2SIcenowy Zheng }; 60cae102e2SIcenowy Zheng 6125309004SMarcin Niestroj static int goodix_check_cfg_8(struct goodix_ts_data *ts, 621a67448fSHans de Goede const u8 *cfg, int len); 6325309004SMarcin Niestroj static int goodix_check_cfg_16(struct goodix_ts_data *ts, 641a67448fSHans de Goede const u8 *cfg, int len); 65de956caeSHans de Goede static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts); 66de956caeSHans de Goede static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts); 6725309004SMarcin Niestroj 6825309004SMarcin Niestroj static const struct goodix_chip_data gt1x_chip_data = { 6925309004SMarcin Niestroj .config_addr = GOODIX_GT1X_REG_CONFIG_DATA, 70686e8a24SHans de Goede .config_len = GOODIX_CONFIG_GT9X_LENGTH, 7125309004SMarcin Niestroj .check_config = goodix_check_cfg_16, 72de956caeSHans de Goede .calc_config_checksum = goodix_calc_cfg_checksum_16, 7325309004SMarcin Niestroj }; 7425309004SMarcin Niestroj 7525309004SMarcin Niestroj static const struct goodix_chip_data gt911_chip_data = { 7625309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 7725309004SMarcin Niestroj .config_len = GOODIX_CONFIG_911_LENGTH, 7825309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 79de956caeSHans de Goede .calc_config_checksum = goodix_calc_cfg_checksum_8, 8025309004SMarcin Niestroj }; 8125309004SMarcin Niestroj 8225309004SMarcin Niestroj static const struct goodix_chip_data gt967_chip_data = { 8325309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 8425309004SMarcin Niestroj .config_len = GOODIX_CONFIG_967_LENGTH, 8525309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 86de956caeSHans de Goede .calc_config_checksum = goodix_calc_cfg_checksum_8, 8725309004SMarcin Niestroj }; 8825309004SMarcin Niestroj 8925309004SMarcin Niestroj static const struct goodix_chip_data gt9x_chip_data = { 9025309004SMarcin Niestroj .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 91686e8a24SHans de Goede .config_len = GOODIX_CONFIG_GT9X_LENGTH, 9225309004SMarcin Niestroj .check_config = goodix_check_cfg_8, 93de956caeSHans de Goede .calc_config_checksum = goodix_calc_cfg_checksum_8, 9425309004SMarcin Niestroj }; 9525309004SMarcin Niestroj 96cae102e2SIcenowy Zheng static const struct goodix_chip_id goodix_chip_ids[] = { 97cae102e2SIcenowy Zheng { .id = "1151", .data = >1x_chip_data }, 98cae102e2SIcenowy Zheng { .id = "5663", .data = >1x_chip_data }, 99cae102e2SIcenowy Zheng { .id = "5688", .data = >1x_chip_data }, 100b5e458afSIcenowy Zheng { .id = "917S", .data = >1x_chip_data }, 1012dce6db7SAngeloGioacchino Del Regno { .id = "9286", .data = >1x_chip_data }, 102cae102e2SIcenowy Zheng 103cae102e2SIcenowy Zheng { .id = "911", .data = >911_chip_data }, 104cae102e2SIcenowy Zheng { .id = "9271", .data = >911_chip_data }, 105cae102e2SIcenowy Zheng { .id = "9110", .data = >911_chip_data }, 10681e81886SHans de Goede { .id = "9111", .data = >911_chip_data }, 107cae102e2SIcenowy Zheng { .id = "927", .data = >911_chip_data }, 108cae102e2SIcenowy Zheng { .id = "928", .data = >911_chip_data }, 109cae102e2SIcenowy Zheng 110cae102e2SIcenowy Zheng { .id = "912", .data = >967_chip_data }, 111b9a1c116SYannick Fertre { .id = "9147", .data = >967_chip_data }, 112cae102e2SIcenowy Zheng { .id = "967", .data = >967_chip_data }, 113cae102e2SIcenowy Zheng { } 114cae102e2SIcenowy Zheng }; 115cae102e2SIcenowy Zheng 116ca96ea86SBastien Nocera static const unsigned long goodix_irq_flags[] = { 117ca96ea86SBastien Nocera IRQ_TYPE_EDGE_RISING, 118ca96ea86SBastien Nocera IRQ_TYPE_EDGE_FALLING, 119ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_LOW, 120ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_HIGH, 121ca96ea86SBastien Nocera }; 122ca96ea86SBastien Nocera 123bd3b8480SYauhen Kharuzhy static const struct dmi_system_id nine_bytes_report[] = { 124bd3b8480SYauhen Kharuzhy #if defined(CONFIG_DMI) && defined(CONFIG_X86) 125bd3b8480SYauhen Kharuzhy { 126bd3b8480SYauhen Kharuzhy .ident = "Lenovo YogaBook", 127bd3b8480SYauhen Kharuzhy /* YB1-X91L/F and YB1-X90L/F */ 128bd3b8480SYauhen Kharuzhy .matches = { 129bd3b8480SYauhen Kharuzhy DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X9") 130bd3b8480SYauhen Kharuzhy } 131bd3b8480SYauhen Kharuzhy }, 132bd3b8480SYauhen Kharuzhy #endif 133bd3b8480SYauhen Kharuzhy {} 134bd3b8480SYauhen Kharuzhy }; 135bd3b8480SYauhen Kharuzhy 1361dd5ddc1SSergei A. Trusov /* 1371dd5ddc1SSergei A. Trusov * Those tablets have their x coordinate inverted 1381dd5ddc1SSergei A. Trusov */ 1391dd5ddc1SSergei A. Trusov static const struct dmi_system_id inverted_x_screen[] = { 1401dd5ddc1SSergei A. Trusov #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1411dd5ddc1SSergei A. Trusov { 1421dd5ddc1SSergei A. Trusov .ident = "Cube I15-TC", 1431dd5ddc1SSergei A. Trusov .matches = { 1441dd5ddc1SSergei A. Trusov DMI_MATCH(DMI_SYS_VENDOR, "Cube"), 1451dd5ddc1SSergei A. Trusov DMI_MATCH(DMI_PRODUCT_NAME, "I15-TC") 1461dd5ddc1SSergei A. Trusov }, 1471dd5ddc1SSergei A. Trusov }, 1481dd5ddc1SSergei A. Trusov #endif 1491dd5ddc1SSergei A. Trusov {} 1501dd5ddc1SSergei A. Trusov }; 1511dd5ddc1SSergei A. Trusov 152ca96ea86SBastien Nocera /** 153ca96ea86SBastien Nocera * goodix_i2c_read - read data from a register of the i2c slave device. 154ca96ea86SBastien Nocera * 155ca96ea86SBastien Nocera * @client: i2c device. 156ca96ea86SBastien Nocera * @reg: the register to read from. 157ca96ea86SBastien Nocera * @buf: raw write data buffer. 158ca96ea86SBastien Nocera * @len: length of the buffer to write 159ca96ea86SBastien Nocera */ 160a2233cb7SHans de Goede int goodix_i2c_read(struct i2c_client *client, u16 reg, u8 *buf, int len) 161ca96ea86SBastien Nocera { 162ca96ea86SBastien Nocera struct i2c_msg msgs[2]; 163fafef982SMarcin Niestroj __be16 wbuf = cpu_to_be16(reg); 164ca96ea86SBastien Nocera int ret; 165ca96ea86SBastien Nocera 166ca96ea86SBastien Nocera msgs[0].flags = 0; 167ca96ea86SBastien Nocera msgs[0].addr = client->addr; 168ca96ea86SBastien Nocera msgs[0].len = 2; 169ca96ea86SBastien Nocera msgs[0].buf = (u8 *)&wbuf; 170ca96ea86SBastien Nocera 171ca96ea86SBastien Nocera msgs[1].flags = I2C_M_RD; 172ca96ea86SBastien Nocera msgs[1].addr = client->addr; 173ca96ea86SBastien Nocera msgs[1].len = len; 174ca96ea86SBastien Nocera msgs[1].buf = buf; 175ca96ea86SBastien Nocera 176ca96ea86SBastien Nocera ret = i2c_transfer(client->adapter, msgs, 2); 1777642f29cSHans de Goede if (ret >= 0) 1787642f29cSHans de Goede ret = (ret == ARRAY_SIZE(msgs) ? 0 : -EIO); 1797642f29cSHans de Goede 1807642f29cSHans de Goede if (ret) 1817642f29cSHans de Goede dev_err(&client->dev, "Error reading %d bytes from 0x%04x: %d\n", 1827642f29cSHans de Goede len, reg, ret); 1837642f29cSHans de Goede return ret; 184ca96ea86SBastien Nocera } 185ca96ea86SBastien Nocera 18668caf858SIrina Tirdea /** 18768caf858SIrina Tirdea * goodix_i2c_write - write data to a register of the i2c slave device. 18868caf858SIrina Tirdea * 18968caf858SIrina Tirdea * @client: i2c device. 19068caf858SIrina Tirdea * @reg: the register to write to. 19168caf858SIrina Tirdea * @buf: raw data buffer to write. 19268caf858SIrina Tirdea * @len: length of the buffer to write 19368caf858SIrina Tirdea */ 194a2233cb7SHans de Goede int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf, int len) 19568caf858SIrina Tirdea { 19668caf858SIrina Tirdea u8 *addr_buf; 19768caf858SIrina Tirdea struct i2c_msg msg; 19868caf858SIrina Tirdea int ret; 19968caf858SIrina Tirdea 20068caf858SIrina Tirdea addr_buf = kmalloc(len + 2, GFP_KERNEL); 20168caf858SIrina Tirdea if (!addr_buf) 20268caf858SIrina Tirdea return -ENOMEM; 20368caf858SIrina Tirdea 20468caf858SIrina Tirdea addr_buf[0] = reg >> 8; 20568caf858SIrina Tirdea addr_buf[1] = reg & 0xFF; 20668caf858SIrina Tirdea memcpy(&addr_buf[2], buf, len); 20768caf858SIrina Tirdea 20868caf858SIrina Tirdea msg.flags = 0; 20968caf858SIrina Tirdea msg.addr = client->addr; 21068caf858SIrina Tirdea msg.buf = addr_buf; 21168caf858SIrina Tirdea msg.len = len + 2; 21268caf858SIrina Tirdea 21368caf858SIrina Tirdea ret = i2c_transfer(client->adapter, &msg, 1); 2147642f29cSHans de Goede if (ret >= 0) 2157642f29cSHans de Goede ret = (ret == 1 ? 0 : -EIO); 2167642f29cSHans de Goede 21768caf858SIrina Tirdea kfree(addr_buf); 2187642f29cSHans de Goede 2197642f29cSHans de Goede if (ret) 2207642f29cSHans de Goede dev_err(&client->dev, "Error writing %d bytes to 0x%04x: %d\n", 2217642f29cSHans de Goede len, reg, ret); 2227642f29cSHans de Goede return ret; 22368caf858SIrina Tirdea } 22468caf858SIrina Tirdea 225a2233cb7SHans de Goede int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value) 2265ab09d6aSIrina Tirdea { 2275ab09d6aSIrina Tirdea return goodix_i2c_write(client, reg, &value, sizeof(value)); 2285ab09d6aSIrina Tirdea } 2295ab09d6aSIrina Tirdea 230cae102e2SIcenowy Zheng static const struct goodix_chip_data *goodix_get_chip_data(const char *id) 231a779fbc6SIrina Tirdea { 232cae102e2SIcenowy Zheng unsigned int i; 23325309004SMarcin Niestroj 234cae102e2SIcenowy Zheng for (i = 0; goodix_chip_ids[i].id; i++) { 235cae102e2SIcenowy Zheng if (!strcmp(goodix_chip_ids[i].id, id)) 236cae102e2SIcenowy Zheng return goodix_chip_ids[i].data; 237a779fbc6SIrina Tirdea } 238cae102e2SIcenowy Zheng 239cae102e2SIcenowy Zheng return >9x_chip_data; 240a779fbc6SIrina Tirdea } 241a779fbc6SIrina Tirdea 242ca96ea86SBastien Nocera static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data) 243ca96ea86SBastien Nocera { 2449b5db7aaSPaul Cercueil unsigned long max_timeout; 245ca96ea86SBastien Nocera int touch_num; 246ca96ea86SBastien Nocera int error; 247492ee52cSDmitry Mastykin u16 addr = GOODIX_READ_COOR_ADDR; 248492ee52cSDmitry Mastykin /* 249492ee52cSDmitry Mastykin * We are going to read 1-byte header, 250492ee52cSDmitry Mastykin * ts->contact_size * max(1, touch_num) bytes of coordinates 251492ee52cSDmitry Mastykin * and 1-byte footer which contains the touch-key code. 252492ee52cSDmitry Mastykin */ 253492ee52cSDmitry Mastykin const int header_contact_keycode_size = 1 + ts->contact_size + 1; 254ca96ea86SBastien Nocera 2559b5db7aaSPaul Cercueil /* 2569b5db7aaSPaul Cercueil * The 'buffer status' bit, which indicates that the data is valid, is 2579b5db7aaSPaul Cercueil * not set as soon as the interrupt is raised, but slightly after. 2589b5db7aaSPaul Cercueil * This takes around 10 ms to happen, so we poll for 20 ms. 2599b5db7aaSPaul Cercueil */ 2609b5db7aaSPaul Cercueil max_timeout = jiffies + msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT); 2619b5db7aaSPaul Cercueil do { 262492ee52cSDmitry Mastykin error = goodix_i2c_read(ts->client, addr, data, 263492ee52cSDmitry Mastykin header_contact_keycode_size); 2647642f29cSHans de Goede if (error) 265ca96ea86SBastien Nocera return error; 266ca96ea86SBastien Nocera 2679b5db7aaSPaul Cercueil if (data[0] & GOODIX_BUFFER_STATUS_READY) { 268ca96ea86SBastien Nocera touch_num = data[0] & 0x0f; 269a7ac7c95SAleksei Mamlin if (touch_num > ts->max_touch_num) 270ca96ea86SBastien Nocera return -EPROTO; 271ca96ea86SBastien Nocera 272ca96ea86SBastien Nocera if (touch_num > 1) { 273492ee52cSDmitry Mastykin addr += header_contact_keycode_size; 274492ee52cSDmitry Mastykin data += header_contact_keycode_size; 275ca96ea86SBastien Nocera error = goodix_i2c_read(ts->client, 276492ee52cSDmitry Mastykin addr, data, 277bd3b8480SYauhen Kharuzhy ts->contact_size * 2789b5db7aaSPaul Cercueil (touch_num - 1)); 279ca96ea86SBastien Nocera if (error) 280ca96ea86SBastien Nocera return error; 281ca96ea86SBastien Nocera } 282ca96ea86SBastien Nocera 283ca96ea86SBastien Nocera return touch_num; 284ca96ea86SBastien Nocera } 285ca96ea86SBastien Nocera 28609182ed2SHans de Goede if (data[0] == 0 && ts->firmware_name) { 28709182ed2SHans de Goede if (goodix_handle_fw_request(ts)) 28809182ed2SHans de Goede return 0; 28909182ed2SHans de Goede } 29009182ed2SHans de Goede 2919b5db7aaSPaul Cercueil usleep_range(1000, 2000); /* Poll every 1 - 2 ms */ 2929b5db7aaSPaul Cercueil } while (time_before(jiffies, max_timeout)); 2939b5db7aaSPaul Cercueil 2949b5db7aaSPaul Cercueil /* 2959b5db7aaSPaul Cercueil * The Goodix panel will send spurious interrupts after a 2969b5db7aaSPaul Cercueil * 'finger up' event, which will always cause a timeout. 2979b5db7aaSPaul Cercueil */ 29824ef83f6SDmitry Mastykin return -ENOMSG; 2999b5db7aaSPaul Cercueil } 3009b5db7aaSPaul Cercueil 30165de58c2SHans de Goede static int goodix_create_pen_input(struct goodix_ts_data *ts) 3025ede7f0cSHans de Goede { 3035ede7f0cSHans de Goede struct device *dev = &ts->client->dev; 3045ede7f0cSHans de Goede struct input_dev *input; 3055ede7f0cSHans de Goede 3065ede7f0cSHans de Goede input = devm_input_allocate_device(dev); 3075ede7f0cSHans de Goede if (!input) 30865de58c2SHans de Goede return -ENOMEM; 3095ede7f0cSHans de Goede 310ae8e80c5SHans de Goede input_copy_abs(input, ABS_X, ts->input_dev, ABS_MT_POSITION_X); 311ae8e80c5SHans de Goede input_copy_abs(input, ABS_Y, ts->input_dev, ABS_MT_POSITION_Y); 3125ede7f0cSHans de Goede /* 3135ede7f0cSHans de Goede * The resolution of these touchscreens is about 10 units/mm, the actual 3145ede7f0cSHans de Goede * resolution does not matter much since we set INPUT_PROP_DIRECT. 3155ede7f0cSHans de Goede * Userspace wants something here though, so just set it to 10 units/mm. 3165ede7f0cSHans de Goede */ 3175ede7f0cSHans de Goede input_abs_set_res(input, ABS_X, 10); 3185ede7f0cSHans de Goede input_abs_set_res(input, ABS_Y, 10); 319ae8e80c5SHans de Goede input_set_abs_params(input, ABS_PRESSURE, 0, 255, 0, 0); 320ae8e80c5SHans de Goede 321ae8e80c5SHans de Goede input_set_capability(input, EV_KEY, BTN_TOUCH); 322ae8e80c5SHans de Goede input_set_capability(input, EV_KEY, BTN_TOOL_PEN); 323ae8e80c5SHans de Goede input_set_capability(input, EV_KEY, BTN_STYLUS); 324ae8e80c5SHans de Goede input_set_capability(input, EV_KEY, BTN_STYLUS2); 325ae8e80c5SHans de Goede __set_bit(INPUT_PROP_DIRECT, input->propbit); 3265ede7f0cSHans de Goede 3275ede7f0cSHans de Goede input->name = "Goodix Active Pen"; 3285ede7f0cSHans de Goede input->phys = "input/pen"; 3295ede7f0cSHans de Goede input->id.bustype = BUS_I2C; 33071f4ecd5SHans de Goede input->id.vendor = 0x0416; 3315ede7f0cSHans de Goede if (kstrtou16(ts->id, 10, &input->id.product)) 3325ede7f0cSHans de Goede input->id.product = 0x1001; 3335ede7f0cSHans de Goede input->id.version = ts->version; 3345ede7f0cSHans de Goede 33565de58c2SHans de Goede ts->input_pen = input; 33665de58c2SHans de Goede return 0; 3375ede7f0cSHans de Goede } 3385ede7f0cSHans de Goede 3395ede7f0cSHans de Goede static void goodix_ts_report_pen_down(struct goodix_ts_data *ts, u8 *data) 3405ede7f0cSHans de Goede { 34165de58c2SHans de Goede int input_x, input_y, input_w, error; 3425ede7f0cSHans de Goede u8 key_value; 3435ede7f0cSHans de Goede 34465de58c2SHans de Goede if (!ts->pen_input_registered) { 34565de58c2SHans de Goede error = input_register_device(ts->input_pen); 34665de58c2SHans de Goede ts->pen_input_registered = (error == 0) ? 1 : error; 3475ede7f0cSHans de Goede } 3485ede7f0cSHans de Goede 34965de58c2SHans de Goede if (ts->pen_input_registered < 0) 35065de58c2SHans de Goede return; 35165de58c2SHans de Goede 3525ede7f0cSHans de Goede if (ts->contact_size == 9) { 3535ede7f0cSHans de Goede input_x = get_unaligned_le16(&data[4]); 3545ede7f0cSHans de Goede input_y = get_unaligned_le16(&data[6]); 3555ede7f0cSHans de Goede input_w = get_unaligned_le16(&data[8]); 3565ede7f0cSHans de Goede } else { 3575ede7f0cSHans de Goede input_x = get_unaligned_le16(&data[2]); 3585ede7f0cSHans de Goede input_y = get_unaligned_le16(&data[4]); 3595ede7f0cSHans de Goede input_w = get_unaligned_le16(&data[6]); 3605ede7f0cSHans de Goede } 3615ede7f0cSHans de Goede 3625ede7f0cSHans de Goede touchscreen_report_pos(ts->input_pen, &ts->prop, input_x, input_y, false); 3635ede7f0cSHans de Goede input_report_abs(ts->input_pen, ABS_PRESSURE, input_w); 3645ede7f0cSHans de Goede 3655ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_TOUCH, 1); 3665ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_TOOL_PEN, 1); 3675ede7f0cSHans de Goede 3685ede7f0cSHans de Goede if (data[0] & GOODIX_HAVE_KEY) { 3695ede7f0cSHans de Goede key_value = data[1 + ts->contact_size]; 3705ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_STYLUS, key_value & 0x10); 3715ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_STYLUS2, key_value & 0x20); 3725ede7f0cSHans de Goede } else { 3735ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_STYLUS, 0); 3745ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_STYLUS2, 0); 3755ede7f0cSHans de Goede } 3765ede7f0cSHans de Goede 3775ede7f0cSHans de Goede input_sync(ts->input_pen); 3785ede7f0cSHans de Goede } 3795ede7f0cSHans de Goede 3805ede7f0cSHans de Goede static void goodix_ts_report_pen_up(struct goodix_ts_data *ts) 3815ede7f0cSHans de Goede { 3825ede7f0cSHans de Goede if (!ts->input_pen) 3835ede7f0cSHans de Goede return; 3845ede7f0cSHans de Goede 3855ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_TOUCH, 0); 3865ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_TOOL_PEN, 0); 3875ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_STYLUS, 0); 3885ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_STYLUS2, 0); 3895ede7f0cSHans de Goede 3905ede7f0cSHans de Goede input_sync(ts->input_pen); 3915ede7f0cSHans de Goede } 3925ede7f0cSHans de Goede 393bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_8b(struct goodix_ts_data *ts, u8 *coor_data) 394ca96ea86SBastien Nocera { 395ca96ea86SBastien Nocera int id = coor_data[0] & 0x0F; 396ca96ea86SBastien Nocera int input_x = get_unaligned_le16(&coor_data[1]); 397ca96ea86SBastien Nocera int input_y = get_unaligned_le16(&coor_data[3]); 398ca96ea86SBastien Nocera int input_w = get_unaligned_le16(&coor_data[5]); 399ca96ea86SBastien Nocera 400ca96ea86SBastien Nocera input_mt_slot(ts->input_dev, id); 401ca96ea86SBastien Nocera input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 402fafef982SMarcin Niestroj touchscreen_report_pos(ts->input_dev, &ts->prop, 403fafef982SMarcin Niestroj input_x, input_y, true); 404ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 405ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 406ca96ea86SBastien Nocera } 407ca96ea86SBastien Nocera 408bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_9b(struct goodix_ts_data *ts, u8 *coor_data) 409bd3b8480SYauhen Kharuzhy { 410bd3b8480SYauhen Kharuzhy int id = coor_data[1] & 0x0F; 411bd3b8480SYauhen Kharuzhy int input_x = get_unaligned_le16(&coor_data[3]); 412bd3b8480SYauhen Kharuzhy int input_y = get_unaligned_le16(&coor_data[5]); 413bd3b8480SYauhen Kharuzhy int input_w = get_unaligned_le16(&coor_data[7]); 414bd3b8480SYauhen Kharuzhy 415bd3b8480SYauhen Kharuzhy input_mt_slot(ts->input_dev, id); 416bd3b8480SYauhen Kharuzhy input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 417bd3b8480SYauhen Kharuzhy touchscreen_report_pos(ts->input_dev, &ts->prop, 418bd3b8480SYauhen Kharuzhy input_x, input_y, true); 419bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 420bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 421bd3b8480SYauhen Kharuzhy } 422bd3b8480SYauhen Kharuzhy 4235ede7f0cSHans de Goede static void goodix_ts_release_keys(struct goodix_ts_data *ts) 4245ede7f0cSHans de Goede { 4255ede7f0cSHans de Goede int i; 4265ede7f0cSHans de Goede 4275ede7f0cSHans de Goede for (i = 0; i < GOODIX_MAX_KEYS; i++) 4285ede7f0cSHans de Goede input_report_key(ts->input_dev, ts->keymap[i], 0); 4295ede7f0cSHans de Goede } 4305ede7f0cSHans de Goede 431492ee52cSDmitry Mastykin static void goodix_ts_report_key(struct goodix_ts_data *ts, u8 *data) 432492ee52cSDmitry Mastykin { 433492ee52cSDmitry Mastykin int touch_num; 434492ee52cSDmitry Mastykin u8 key_value; 435492ee52cSDmitry Mastykin int i; 436492ee52cSDmitry Mastykin 437492ee52cSDmitry Mastykin if (data[0] & GOODIX_HAVE_KEY) { 438492ee52cSDmitry Mastykin touch_num = data[0] & 0x0f; 439492ee52cSDmitry Mastykin key_value = data[1 + ts->contact_size * touch_num]; 440492ee52cSDmitry Mastykin for (i = 0; i < GOODIX_MAX_KEYS; i++) 441492ee52cSDmitry Mastykin if (key_value & BIT(i)) 442492ee52cSDmitry Mastykin input_report_key(ts->input_dev, 443492ee52cSDmitry Mastykin ts->keymap[i], 1); 444492ee52cSDmitry Mastykin } else { 4455ede7f0cSHans de Goede goodix_ts_release_keys(ts); 446492ee52cSDmitry Mastykin } 447492ee52cSDmitry Mastykin } 448492ee52cSDmitry Mastykin 449ca96ea86SBastien Nocera /** 450ca96ea86SBastien Nocera * goodix_process_events - Process incoming events 451ca96ea86SBastien Nocera * 452ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 453ca96ea86SBastien Nocera * 454ca96ea86SBastien Nocera * Called when the IRQ is triggered. Read the current device state, and push 455ca96ea86SBastien Nocera * the input events to the user space. 456ca96ea86SBastien Nocera */ 457ca96ea86SBastien Nocera static void goodix_process_events(struct goodix_ts_data *ts) 458ca96ea86SBastien Nocera { 459492ee52cSDmitry Mastykin u8 point_data[2 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS]; 460ca96ea86SBastien Nocera int touch_num; 461ca96ea86SBastien Nocera int i; 462ca96ea86SBastien Nocera 463ca96ea86SBastien Nocera touch_num = goodix_ts_read_input_report(ts, point_data); 464ca96ea86SBastien Nocera if (touch_num < 0) 465ca96ea86SBastien Nocera return; 466ca96ea86SBastien Nocera 4675ede7f0cSHans de Goede /* The pen being down is always reported as a single touch */ 4685ede7f0cSHans de Goede if (touch_num == 1 && (point_data[1] & 0x80)) { 4695ede7f0cSHans de Goede goodix_ts_report_pen_down(ts, point_data); 4705ede7f0cSHans de Goede goodix_ts_release_keys(ts); 47171f4ecd5SHans de Goede goto sync; /* Release any previously registered touches */ 4725ede7f0cSHans de Goede } else { 4735ede7f0cSHans de Goede goodix_ts_report_pen_up(ts); 4745ede7f0cSHans de Goede } 4755ede7f0cSHans de Goede 476492ee52cSDmitry Mastykin goodix_ts_report_key(ts, point_data); 4774a54feeaSSergei A. Trusov 478ca96ea86SBastien Nocera for (i = 0; i < touch_num; i++) 479bd3b8480SYauhen Kharuzhy if (ts->contact_size == 9) 480bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_9b(ts, 481bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 482bd3b8480SYauhen Kharuzhy else 483bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_8b(ts, 484bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 485ca96ea86SBastien Nocera 4865ede7f0cSHans de Goede sync: 487ca96ea86SBastien Nocera input_mt_sync_frame(ts->input_dev); 488ca96ea86SBastien Nocera input_sync(ts->input_dev); 489ca96ea86SBastien Nocera } 490ca96ea86SBastien Nocera 491ca96ea86SBastien Nocera /** 492ca96ea86SBastien Nocera * goodix_ts_irq_handler - The IRQ handler 493ca96ea86SBastien Nocera * 494ca96ea86SBastien Nocera * @irq: interrupt number. 495ca96ea86SBastien Nocera * @dev_id: private data pointer. 496ca96ea86SBastien Nocera */ 497ca96ea86SBastien Nocera static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id) 498ca96ea86SBastien Nocera { 499ca96ea86SBastien Nocera struct goodix_ts_data *ts = dev_id; 500ca96ea86SBastien Nocera 501ca96ea86SBastien Nocera goodix_process_events(ts); 5027642f29cSHans de Goede goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0); 503ca96ea86SBastien Nocera 504ca96ea86SBastien Nocera return IRQ_HANDLED; 505ca96ea86SBastien Nocera } 506ca96ea86SBastien Nocera 5075ab09d6aSIrina Tirdea static void goodix_free_irq(struct goodix_ts_data *ts) 5085ab09d6aSIrina Tirdea { 5095ab09d6aSIrina Tirdea devm_free_irq(&ts->client->dev, ts->client->irq, ts); 5105ab09d6aSIrina Tirdea } 5115ab09d6aSIrina Tirdea 5125ab09d6aSIrina Tirdea static int goodix_request_irq(struct goodix_ts_data *ts) 5135ab09d6aSIrina Tirdea { 5145ab09d6aSIrina Tirdea return devm_request_threaded_irq(&ts->client->dev, ts->client->irq, 5155ab09d6aSIrina Tirdea NULL, goodix_ts_irq_handler, 5165ab09d6aSIrina Tirdea ts->irq_flags, ts->client->name, ts); 5175ab09d6aSIrina Tirdea } 5185ab09d6aSIrina Tirdea 5191a67448fSHans de Goede static int goodix_check_cfg_8(struct goodix_ts_data *ts, const u8 *cfg, int len) 52068caf858SIrina Tirdea { 5211a67448fSHans de Goede int i, raw_cfg_len = len - 2; 52268caf858SIrina Tirdea u8 check_sum = 0; 52368caf858SIrina Tirdea 52468caf858SIrina Tirdea for (i = 0; i < raw_cfg_len; i++) 5251a67448fSHans de Goede check_sum += cfg[i]; 52668caf858SIrina Tirdea check_sum = (~check_sum) + 1; 5271a67448fSHans de Goede if (check_sum != cfg[raw_cfg_len]) { 52868caf858SIrina Tirdea dev_err(&ts->client->dev, 52968caf858SIrina Tirdea "The checksum of the config fw is not correct"); 53068caf858SIrina Tirdea return -EINVAL; 53168caf858SIrina Tirdea } 53268caf858SIrina Tirdea 5331a67448fSHans de Goede if (cfg[raw_cfg_len + 1] != 1) { 53468caf858SIrina Tirdea dev_err(&ts->client->dev, 53568caf858SIrina Tirdea "Config fw must have Config_Fresh register set"); 53668caf858SIrina Tirdea return -EINVAL; 53768caf858SIrina Tirdea } 53868caf858SIrina Tirdea 53968caf858SIrina Tirdea return 0; 54068caf858SIrina Tirdea } 54168caf858SIrina Tirdea 542de956caeSHans de Goede static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts) 543de956caeSHans de Goede { 544de956caeSHans de Goede int i, raw_cfg_len = ts->chip->config_len - 2; 545de956caeSHans de Goede u8 check_sum = 0; 546de956caeSHans de Goede 547de956caeSHans de Goede for (i = 0; i < raw_cfg_len; i++) 548de956caeSHans de Goede check_sum += ts->config[i]; 549de956caeSHans de Goede check_sum = (~check_sum) + 1; 550de956caeSHans de Goede 551de956caeSHans de Goede ts->config[raw_cfg_len] = check_sum; 552de956caeSHans de Goede ts->config[raw_cfg_len + 1] = 1; /* Set "config_fresh" bit */ 553de956caeSHans de Goede } 554de956caeSHans de Goede 5551a67448fSHans de Goede static int goodix_check_cfg_16(struct goodix_ts_data *ts, const u8 *cfg, 5561a67448fSHans de Goede int len) 55725309004SMarcin Niestroj { 5581a67448fSHans de Goede int i, raw_cfg_len = len - 3; 55925309004SMarcin Niestroj u16 check_sum = 0; 56025309004SMarcin Niestroj 56125309004SMarcin Niestroj for (i = 0; i < raw_cfg_len; i += 2) 5621a67448fSHans de Goede check_sum += get_unaligned_be16(&cfg[i]); 56325309004SMarcin Niestroj check_sum = (~check_sum) + 1; 5641a67448fSHans de Goede if (check_sum != get_unaligned_be16(&cfg[raw_cfg_len])) { 56525309004SMarcin Niestroj dev_err(&ts->client->dev, 56625309004SMarcin Niestroj "The checksum of the config fw is not correct"); 56725309004SMarcin Niestroj return -EINVAL; 56825309004SMarcin Niestroj } 56925309004SMarcin Niestroj 5701a67448fSHans de Goede if (cfg[raw_cfg_len + 2] != 1) { 57125309004SMarcin Niestroj dev_err(&ts->client->dev, 57225309004SMarcin Niestroj "Config fw must have Config_Fresh register set"); 57325309004SMarcin Niestroj return -EINVAL; 57425309004SMarcin Niestroj } 57525309004SMarcin Niestroj 57625309004SMarcin Niestroj return 0; 57725309004SMarcin Niestroj } 57825309004SMarcin Niestroj 579de956caeSHans de Goede static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts) 580de956caeSHans de Goede { 581de956caeSHans de Goede int i, raw_cfg_len = ts->chip->config_len - 3; 582de956caeSHans de Goede u16 check_sum = 0; 583de956caeSHans de Goede 584de956caeSHans de Goede for (i = 0; i < raw_cfg_len; i += 2) 585de956caeSHans de Goede check_sum += get_unaligned_be16(&ts->config[i]); 586de956caeSHans de Goede check_sum = (~check_sum) + 1; 587de956caeSHans de Goede 588de956caeSHans de Goede put_unaligned_be16(check_sum, &ts->config[raw_cfg_len]); 589de956caeSHans de Goede ts->config[raw_cfg_len + 2] = 1; /* Set "config_fresh" bit */ 590de956caeSHans de Goede } 591de956caeSHans de Goede 59225309004SMarcin Niestroj /** 59325309004SMarcin Niestroj * goodix_check_cfg - Checks if config fw is valid 59425309004SMarcin Niestroj * 59525309004SMarcin Niestroj * @ts: goodix_ts_data pointer 59625309004SMarcin Niestroj * @cfg: firmware config data 597cb690465SLee Jones * @len: config data length 59825309004SMarcin Niestroj */ 5991a67448fSHans de Goede static int goodix_check_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) 60025309004SMarcin Niestroj { 6011a67448fSHans de Goede if (len < GOODIX_CONFIG_MIN_LENGTH || 6021a67448fSHans de Goede len > GOODIX_CONFIG_MAX_LENGTH) { 60325309004SMarcin Niestroj dev_err(&ts->client->dev, 60425309004SMarcin Niestroj "The length of the config fw is not correct"); 60525309004SMarcin Niestroj return -EINVAL; 60625309004SMarcin Niestroj } 60725309004SMarcin Niestroj 6081a67448fSHans de Goede return ts->chip->check_config(ts, cfg, len); 60925309004SMarcin Niestroj } 61025309004SMarcin Niestroj 61168caf858SIrina Tirdea /** 61268caf858SIrina Tirdea * goodix_send_cfg - Write fw config to device 61368caf858SIrina Tirdea * 61468caf858SIrina Tirdea * @ts: goodix_ts_data pointer 61568caf858SIrina Tirdea * @cfg: config firmware to write to device 616cb690465SLee Jones * @len: config data length 61768caf858SIrina Tirdea */ 618a2233cb7SHans de Goede int goodix_send_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) 61968caf858SIrina Tirdea { 62068caf858SIrina Tirdea int error; 62168caf858SIrina Tirdea 6221a67448fSHans de Goede error = goodix_check_cfg(ts, cfg, len); 62368caf858SIrina Tirdea if (error) 62468caf858SIrina Tirdea return error; 62568caf858SIrina Tirdea 6261a67448fSHans de Goede error = goodix_i2c_write(ts->client, ts->chip->config_addr, cfg, len); 6277642f29cSHans de Goede if (error) 62868caf858SIrina Tirdea return error; 6297642f29cSHans de Goede 63068caf858SIrina Tirdea dev_dbg(&ts->client->dev, "Config sent successfully."); 63168caf858SIrina Tirdea 63268caf858SIrina Tirdea /* Let the firmware reconfigure itself, so sleep for 10ms */ 63368caf858SIrina Tirdea usleep_range(10000, 11000); 63468caf858SIrina Tirdea 63568caf858SIrina Tirdea return 0; 63668caf858SIrina Tirdea } 63768caf858SIrina Tirdea 638c9c20ee3SHans de Goede #ifdef ACPI_GPIO_SUPPORT 639c9c20ee3SHans de Goede static int goodix_pin_acpi_direction_input(struct goodix_ts_data *ts) 64049db3997SHans de Goede { 641c9c20ee3SHans de Goede acpi_handle handle = ACPI_HANDLE(&ts->client->dev); 642c5fca485SHans de Goede acpi_status status; 643c5fca485SHans de Goede 644c9c20ee3SHans de Goede status = acpi_evaluate_object(handle, "INTI", NULL, NULL); 645c9c20ee3SHans de Goede return ACPI_SUCCESS(status) ? 0 : -EIO; 646c9c20ee3SHans de Goede } 647c9c20ee3SHans de Goede 648c9c20ee3SHans de Goede static int goodix_pin_acpi_output_method(struct goodix_ts_data *ts, int value) 649c9c20ee3SHans de Goede { 650c9c20ee3SHans de Goede acpi_handle handle = ACPI_HANDLE(&ts->client->dev); 651c9c20ee3SHans de Goede acpi_status status; 652c9c20ee3SHans de Goede 653c9c20ee3SHans de Goede status = acpi_execute_simple_method(handle, "INTO", value); 654c9c20ee3SHans de Goede return ACPI_SUCCESS(status) ? 0 : -EIO; 655c9c20ee3SHans de Goede } 656c9c20ee3SHans de Goede #else 657c9c20ee3SHans de Goede static int goodix_pin_acpi_direction_input(struct goodix_ts_data *ts) 658c9c20ee3SHans de Goede { 659c9c20ee3SHans de Goede dev_err(&ts->client->dev, 660c9c20ee3SHans de Goede "%s called on device without ACPI support\n", __func__); 661c9c20ee3SHans de Goede return -EINVAL; 662c9c20ee3SHans de Goede } 663c9c20ee3SHans de Goede 664c9c20ee3SHans de Goede static int goodix_pin_acpi_output_method(struct goodix_ts_data *ts, int value) 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 #endif 671c9c20ee3SHans de Goede 672c9c20ee3SHans de Goede static int goodix_irq_direction_output(struct goodix_ts_data *ts, int value) 673c9c20ee3SHans de Goede { 67449db3997SHans de Goede switch (ts->irq_pin_access_method) { 67549db3997SHans de Goede case IRQ_PIN_ACCESS_NONE: 67649db3997SHans de Goede dev_err(&ts->client->dev, 67749db3997SHans de Goede "%s called without an irq_pin_access_method set\n", 67849db3997SHans de Goede __func__); 67949db3997SHans de Goede return -EINVAL; 68049db3997SHans de Goede case IRQ_PIN_ACCESS_GPIO: 68149db3997SHans de Goede return gpiod_direction_output(ts->gpiod_int, value); 682a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 683a7d4b171SHans de Goede /* 684a7d4b171SHans de Goede * The IRQ pin triggers on a falling edge, so its gets marked 685a7d4b171SHans de Goede * as active-low, use output_raw to avoid the value inversion. 686a7d4b171SHans de Goede */ 687a7d4b171SHans de Goede return gpiod_direction_output_raw(ts->gpiod_int, value); 688c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 689c9c20ee3SHans de Goede return goodix_pin_acpi_output_method(ts, value); 69049db3997SHans de Goede } 69149db3997SHans de Goede 69249db3997SHans de Goede return -EINVAL; /* Never reached */ 69349db3997SHans de Goede } 69449db3997SHans de Goede 69549db3997SHans de Goede static int goodix_irq_direction_input(struct goodix_ts_data *ts) 69649db3997SHans de Goede { 69749db3997SHans de Goede switch (ts->irq_pin_access_method) { 69849db3997SHans de Goede case IRQ_PIN_ACCESS_NONE: 69949db3997SHans de Goede dev_err(&ts->client->dev, 70049db3997SHans de Goede "%s called without an irq_pin_access_method set\n", 70149db3997SHans de Goede __func__); 70249db3997SHans de Goede return -EINVAL; 70349db3997SHans de Goede case IRQ_PIN_ACCESS_GPIO: 704c9c20ee3SHans de Goede return gpiod_direction_input(ts->gpiod_int); 705a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 70649db3997SHans de Goede return gpiod_direction_input(ts->gpiod_int); 707c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 708c9c20ee3SHans de Goede return goodix_pin_acpi_direction_input(ts); 70949db3997SHans de Goede } 71049db3997SHans de Goede 71149db3997SHans de Goede return -EINVAL; /* Never reached */ 71249db3997SHans de Goede } 71349db3997SHans de Goede 714a2233cb7SHans de Goede int goodix_int_sync(struct goodix_ts_data *ts) 715ec6e1b40SIrina Tirdea { 716ec6e1b40SIrina Tirdea int error; 717ec6e1b40SIrina Tirdea 71849db3997SHans de Goede error = goodix_irq_direction_output(ts, 0); 719ec6e1b40SIrina Tirdea if (error) 720209bda47SHans de Goede goto error; 721ec6e1b40SIrina Tirdea 722ec6e1b40SIrina Tirdea msleep(50); /* T5: 50ms */ 723ec6e1b40SIrina Tirdea 72449db3997SHans de Goede error = goodix_irq_direction_input(ts); 725ec6e1b40SIrina Tirdea if (error) 726209bda47SHans de Goede goto error; 727ec6e1b40SIrina Tirdea 728ec6e1b40SIrina Tirdea return 0; 729209bda47SHans de Goede 730209bda47SHans de Goede error: 731209bda47SHans de Goede dev_err(&ts->client->dev, "Controller irq sync failed.\n"); 732209bda47SHans de Goede return error; 733209bda47SHans de Goede } 734209bda47SHans de Goede 735209bda47SHans de Goede /** 736209bda47SHans de Goede * goodix_reset_no_int_sync - Reset device, leaving interrupt line in output mode 737209bda47SHans de Goede * 738209bda47SHans de Goede * @ts: goodix_ts_data pointer 739209bda47SHans de Goede */ 740209bda47SHans de Goede int goodix_reset_no_int_sync(struct goodix_ts_data *ts) 741209bda47SHans de Goede { 742209bda47SHans de Goede int error; 743209bda47SHans de Goede 744209bda47SHans de Goede /* begin select I2C slave addr */ 745209bda47SHans de Goede error = gpiod_direction_output(ts->gpiod_rst, 0); 746209bda47SHans de Goede if (error) 747209bda47SHans de Goede goto error; 748209bda47SHans de Goede 749209bda47SHans de Goede msleep(20); /* T2: > 10ms */ 750209bda47SHans de Goede 751209bda47SHans de Goede /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */ 752209bda47SHans de Goede error = goodix_irq_direction_output(ts, ts->client->addr == 0x14); 753209bda47SHans de Goede if (error) 754209bda47SHans de Goede goto error; 755209bda47SHans de Goede 756209bda47SHans de Goede usleep_range(100, 2000); /* T3: > 100us */ 757209bda47SHans de Goede 758209bda47SHans de Goede error = gpiod_direction_output(ts->gpiod_rst, 1); 759209bda47SHans de Goede if (error) 760209bda47SHans de Goede goto error; 761209bda47SHans de Goede 762209bda47SHans de Goede usleep_range(6000, 10000); /* T4: > 5ms */ 763209bda47SHans de Goede 764a2fd46cdSHans de Goede /* 765a2fd46cdSHans de Goede * Put the reset pin back in to input / high-impedance mode to save 766a2fd46cdSHans de Goede * power. Only do this in the non ACPI case since some ACPI boards 767a2fd46cdSHans de Goede * don't have a pull-up, so there the reset pin must stay active-high. 768a2fd46cdSHans de Goede */ 769a2fd46cdSHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_GPIO) { 770209bda47SHans de Goede error = gpiod_direction_input(ts->gpiod_rst); 771209bda47SHans de Goede if (error) 772209bda47SHans de Goede goto error; 773a2fd46cdSHans de Goede } 774209bda47SHans de Goede 775209bda47SHans de Goede return 0; 776209bda47SHans de Goede 777209bda47SHans de Goede error: 778209bda47SHans de Goede dev_err(&ts->client->dev, "Controller reset failed.\n"); 779209bda47SHans de Goede return error; 780ec6e1b40SIrina Tirdea } 781ec6e1b40SIrina Tirdea 782ec6e1b40SIrina Tirdea /** 783ec6e1b40SIrina Tirdea * goodix_reset - Reset device during power on 784ec6e1b40SIrina Tirdea * 785ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 786ec6e1b40SIrina Tirdea */ 787ec6e1b40SIrina Tirdea static int goodix_reset(struct goodix_ts_data *ts) 788ec6e1b40SIrina Tirdea { 789ec6e1b40SIrina Tirdea int error; 790ec6e1b40SIrina Tirdea 791209bda47SHans de Goede error = goodix_reset_no_int_sync(ts); 792ec6e1b40SIrina Tirdea if (error) 793ec6e1b40SIrina Tirdea return error; 794ec6e1b40SIrina Tirdea 795209bda47SHans de Goede return goodix_int_sync(ts); 796ec6e1b40SIrina Tirdea } 797ec6e1b40SIrina Tirdea 798c9c20ee3SHans de Goede #ifdef ACPI_GPIO_SUPPORT 799a7d4b171SHans de Goede static const struct acpi_gpio_params first_gpio = { 0, 0, false }; 800a7d4b171SHans de Goede static const struct acpi_gpio_params second_gpio = { 1, 0, false }; 801a7d4b171SHans de Goede 802a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_first_gpios[] = { 803a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &first_gpio, 1 }, 804a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &second_gpio, 1 }, 805a7d4b171SHans de Goede { }, 806a7d4b171SHans de Goede }; 807a7d4b171SHans de Goede 808a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_last_gpios[] = { 809a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 810a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &second_gpio, 1 }, 811a7d4b171SHans de Goede { }, 812a7d4b171SHans de Goede }; 813a7d4b171SHans de Goede 814c5fca485SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_reset_only_gpios[] = { 815c5fca485SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 816c5fca485SHans de Goede { }, 817c5fca485SHans de Goede }; 818c5fca485SHans de Goede 819a7d4b171SHans de Goede static int goodix_resource(struct acpi_resource *ares, void *data) 820a7d4b171SHans de Goede { 821a7d4b171SHans de Goede struct goodix_ts_data *ts = data; 822a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 823a7d4b171SHans de Goede struct acpi_resource_gpio *gpio; 824a7d4b171SHans de Goede 825a7d4b171SHans de Goede switch (ares->type) { 826a7d4b171SHans de Goede case ACPI_RESOURCE_TYPE_GPIO: 827a7d4b171SHans de Goede gpio = &ares->data.gpio; 828a7d4b171SHans de Goede if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { 829a7d4b171SHans de Goede if (ts->gpio_int_idx == -1) { 830a7d4b171SHans de Goede ts->gpio_int_idx = ts->gpio_count; 831a7d4b171SHans de Goede } else { 832a7d4b171SHans de Goede dev_err(dev, "More then one GpioInt resource, ignoring ACPI GPIO resources\n"); 833a7d4b171SHans de Goede ts->gpio_int_idx = -2; 834a7d4b171SHans de Goede } 835a7d4b171SHans de Goede } 836a7d4b171SHans de Goede ts->gpio_count++; 837a7d4b171SHans de Goede break; 838a7d4b171SHans de Goede default: 839a7d4b171SHans de Goede break; 840a7d4b171SHans de Goede } 841a7d4b171SHans de Goede 842a7d4b171SHans de Goede return 0; 843a7d4b171SHans de Goede } 844a7d4b171SHans de Goede 845a7d4b171SHans de Goede /* 846a7d4b171SHans de Goede * This function gets called in case we fail to get the irq GPIO directly 847a7d4b171SHans de Goede * because the ACPI tables lack GPIO-name to APCI _CRS index mappings 848a7d4b171SHans de Goede * (no _DSD UUID daffd814-6eba-4d8c-8a91-bc9bbf4aa301 data). 849a7d4b171SHans de Goede * In that case we add our own mapping and then goodix_get_gpio_config() 850a7d4b171SHans de Goede * retries to get the GPIOs based on the added mapping. 851a7d4b171SHans de Goede */ 852a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 853a7d4b171SHans de Goede { 854a7d4b171SHans de Goede const struct acpi_gpio_mapping *gpio_mapping = NULL; 855a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 856a7d4b171SHans de Goede LIST_HEAD(resources); 857d9829926SHans de Goede int irq, ret; 858a7d4b171SHans de Goede 859a7d4b171SHans de Goede ts->gpio_count = 0; 860a7d4b171SHans de Goede ts->gpio_int_idx = -1; 861a7d4b171SHans de Goede ret = acpi_dev_get_resources(ACPI_COMPANION(dev), &resources, 862a7d4b171SHans de Goede goodix_resource, ts); 863a7d4b171SHans de Goede if (ret < 0) { 864a7d4b171SHans de Goede dev_err(dev, "Error getting ACPI resources: %d\n", ret); 865a7d4b171SHans de Goede return ret; 866a7d4b171SHans de Goede } 867a7d4b171SHans de Goede 868a7d4b171SHans de Goede acpi_dev_free_resource_list(&resources); 869a7d4b171SHans de Goede 870d9829926SHans de Goede /* 871d9829926SHans de Goede * CHT devices should have a GpioInt + a regular GPIO ACPI resource. 872d9829926SHans de Goede * Some CHT devices have a bug (where the also is bogus Interrupt 873d9829926SHans de Goede * resource copied from a previous BYT based generation). i2c-core-acpi 874d9829926SHans de Goede * will use the non-working Interrupt resource, fix this up. 875d9829926SHans de Goede */ 876d9829926SHans de Goede if (soc_intel_is_cht() && ts->gpio_count == 2 && ts->gpio_int_idx != -1) { 877d9829926SHans de Goede irq = acpi_dev_gpio_irq_get(ACPI_COMPANION(dev), 0); 878d9829926SHans de Goede if (irq > 0 && irq != ts->client->irq) { 879d9829926SHans de Goede dev_warn(dev, "Overriding IRQ %d -> %d\n", ts->client->irq, irq); 880d9829926SHans de Goede ts->client->irq = irq; 881d9829926SHans de Goede } 882d9829926SHans de Goede } 883d9829926SHans de Goede 884a7d4b171SHans de Goede if (ts->gpio_count == 2 && ts->gpio_int_idx == 0) { 885a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 886a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_first_gpios; 887a7d4b171SHans de Goede } else if (ts->gpio_count == 2 && ts->gpio_int_idx == 1) { 888a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 889a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_last_gpios; 890c5fca485SHans de Goede } else if (ts->gpio_count == 1 && ts->gpio_int_idx == -1 && 891c5fca485SHans de Goede acpi_has_method(ACPI_HANDLE(dev), "INTI") && 892c5fca485SHans de Goede acpi_has_method(ACPI_HANDLE(dev), "INTO")) { 893c5fca485SHans de Goede dev_info(dev, "Using ACPI INTI and INTO methods for IRQ pin access\n"); 894c5fca485SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_METHOD; 895c5fca485SHans de Goede gpio_mapping = acpi_goodix_reset_only_gpios; 896d176708fSHans de Goede } else if (soc_intel_is_byt() && ts->gpio_count == 2 && ts->gpio_int_idx == -1) { 89767abd9eeSHans de Goede dev_info(dev, "No ACPI GpioInt resource, assuming that the GPIO order is reset, int\n"); 89867abd9eeSHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 89967abd9eeSHans de Goede gpio_mapping = acpi_goodix_int_last_gpios; 900a7d4b171SHans de Goede } else { 901a7d4b171SHans de Goede dev_warn(dev, "Unexpected ACPI resources: gpio_count %d, gpio_int_idx %d\n", 902a7d4b171SHans de Goede ts->gpio_count, ts->gpio_int_idx); 903*3de93e6eSHans de Goede /* 904*3de93e6eSHans de Goede * On some devices _PS0 does a reset for us and 905*3de93e6eSHans de Goede * sometimes this is necessary for things to work. 906*3de93e6eSHans de Goede */ 907*3de93e6eSHans de Goede acpi_device_fix_up_power(ACPI_COMPANION(dev)); 908a7d4b171SHans de Goede return -EINVAL; 909a7d4b171SHans de Goede } 910a7d4b171SHans de Goede 911a2fd46cdSHans de Goede /* 912a2fd46cdSHans de Goede * Normally we put the reset pin in input / high-impedance mode to save 913a2fd46cdSHans de Goede * power. But some x86/ACPI boards don't have a pull-up, so for the ACPI 914a2fd46cdSHans de Goede * case, leave the pin as is. This results in the pin not being touched 915a2fd46cdSHans de Goede * at all on x86/ACPI boards, except when needed for error-recover. 916a2fd46cdSHans de Goede */ 917a2fd46cdSHans de Goede ts->gpiod_rst_flags = GPIOD_ASIS; 918a2fd46cdSHans de Goede 919a7d4b171SHans de Goede return devm_acpi_dev_add_driver_gpios(dev, gpio_mapping); 920a7d4b171SHans de Goede } 921a7d4b171SHans de Goede #else 922a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 923a7d4b171SHans de Goede { 924a7d4b171SHans de Goede return -EINVAL; 925a7d4b171SHans de Goede } 926a7d4b171SHans de Goede #endif /* CONFIG_X86 && CONFIG_ACPI */ 927a7d4b171SHans de Goede 928ec6e1b40SIrina Tirdea /** 929ec6e1b40SIrina Tirdea * goodix_get_gpio_config - Get GPIO config from ACPI/DT 930ec6e1b40SIrina Tirdea * 931ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 932ec6e1b40SIrina Tirdea */ 933ec6e1b40SIrina Tirdea static int goodix_get_gpio_config(struct goodix_ts_data *ts) 934ec6e1b40SIrina Tirdea { 935ec6e1b40SIrina Tirdea int error; 936ec6e1b40SIrina Tirdea struct device *dev; 937ec6e1b40SIrina Tirdea struct gpio_desc *gpiod; 938a7d4b171SHans de Goede bool added_acpi_mappings = false; 939ec6e1b40SIrina Tirdea 940ec6e1b40SIrina Tirdea if (!ts->client) 941ec6e1b40SIrina Tirdea return -EINVAL; 942ec6e1b40SIrina Tirdea dev = &ts->client->dev; 943ec6e1b40SIrina Tirdea 944a2fd46cdSHans de Goede /* 945a2fd46cdSHans de Goede * By default we request the reset pin as input, leaving it in 946a2fd46cdSHans de Goede * high-impedance when not resetting the controller to save power. 947a2fd46cdSHans de Goede */ 948a2fd46cdSHans de Goede ts->gpiod_rst_flags = GPIOD_IN; 949a2fd46cdSHans de Goede 950ae97fb58SJagan Teki ts->avdd28 = devm_regulator_get(dev, "AVDD28"); 951ae97fb58SJagan Teki if (IS_ERR(ts->avdd28)) { 952ae97fb58SJagan Teki error = PTR_ERR(ts->avdd28); 953ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 954ae97fb58SJagan Teki dev_err(dev, 955ae97fb58SJagan Teki "Failed to get AVDD28 regulator: %d\n", error); 956ae97fb58SJagan Teki return error; 957ae97fb58SJagan Teki } 958ae97fb58SJagan Teki 959ae97fb58SJagan Teki ts->vddio = devm_regulator_get(dev, "VDDIO"); 960ae97fb58SJagan Teki if (IS_ERR(ts->vddio)) { 961ae97fb58SJagan Teki error = PTR_ERR(ts->vddio); 962ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 963ae97fb58SJagan Teki dev_err(dev, 964ae97fb58SJagan Teki "Failed to get VDDIO regulator: %d\n", error); 965ae97fb58SJagan Teki return error; 966ae97fb58SJagan Teki } 967ae97fb58SJagan Teki 968a7d4b171SHans de Goede retry_get_irq_gpio: 969ec6e1b40SIrina Tirdea /* Get the interrupt GPIO pin number */ 970ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN); 971ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 972ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 973ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 97484345c61SHans de Goede dev_err(dev, "Failed to get %s GPIO: %d\n", 975ec6e1b40SIrina Tirdea GOODIX_GPIO_INT_NAME, error); 976ec6e1b40SIrina Tirdea return error; 977ec6e1b40SIrina Tirdea } 978a7d4b171SHans de Goede if (!gpiod && has_acpi_companion(dev) && !added_acpi_mappings) { 979a7d4b171SHans de Goede added_acpi_mappings = true; 980a7d4b171SHans de Goede if (goodix_add_acpi_gpio_mappings(ts) == 0) 981a7d4b171SHans de Goede goto retry_get_irq_gpio; 982a7d4b171SHans de Goede } 983ec6e1b40SIrina Tirdea 984ec6e1b40SIrina Tirdea ts->gpiod_int = gpiod; 985ec6e1b40SIrina Tirdea 986ec6e1b40SIrina Tirdea /* Get the reset line GPIO pin number */ 987a2fd46cdSHans de Goede gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, ts->gpiod_rst_flags); 988ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 989ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 990ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 99184345c61SHans de Goede dev_err(dev, "Failed to get %s GPIO: %d\n", 992ec6e1b40SIrina Tirdea GOODIX_GPIO_RST_NAME, error); 993ec6e1b40SIrina Tirdea return error; 994ec6e1b40SIrina Tirdea } 995ec6e1b40SIrina Tirdea 996ec6e1b40SIrina Tirdea ts->gpiod_rst = gpiod; 997ec6e1b40SIrina Tirdea 998a7d4b171SHans de Goede switch (ts->irq_pin_access_method) { 999a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 1000a7d4b171SHans de Goede /* 1001a7d4b171SHans de Goede * We end up here if goodix_add_acpi_gpio_mappings() has 1002a7d4b171SHans de Goede * called devm_acpi_dev_add_driver_gpios() because the ACPI 1003a7d4b171SHans de Goede * tables did not contain name to index mappings. 1004a7d4b171SHans de Goede * Check that we successfully got both GPIOs after we've 1005a7d4b171SHans de Goede * added our own acpi_gpio_mapping and if we did not get both 1006a7d4b171SHans de Goede * GPIOs reset irq_pin_access_method to IRQ_PIN_ACCESS_NONE. 1007a7d4b171SHans de Goede */ 1008a7d4b171SHans de Goede if (!ts->gpiod_int || !ts->gpiod_rst) 1009a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 1010a7d4b171SHans de Goede break; 1011c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 1012c5fca485SHans de Goede if (!ts->gpiod_rst) 1013c5fca485SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 1014c5fca485SHans de Goede break; 1015a7d4b171SHans de Goede default: 1016e070a97bSHans de Goede if (ts->gpiod_int && ts->gpiod_rst) { 10171921daceSHans de Goede ts->reset_controller_at_probe = true; 1018e070a97bSHans de Goede ts->load_cfg_from_disk = true; 101949db3997SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_GPIO; 1020e070a97bSHans de Goede } 1021a7d4b171SHans de Goede } 102249db3997SHans de Goede 1023ec6e1b40SIrina Tirdea return 0; 1024ec6e1b40SIrina Tirdea } 1025ec6e1b40SIrina Tirdea 1026ca96ea86SBastien Nocera /** 1027ca96ea86SBastien Nocera * goodix_read_config - Read the embedded configuration of the panel 1028ca96ea86SBastien Nocera * 1029ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 1030ca96ea86SBastien Nocera * 1031ca96ea86SBastien Nocera * Must be called during probe 1032ca96ea86SBastien Nocera */ 1033ca96ea86SBastien Nocera static void goodix_read_config(struct goodix_ts_data *ts) 1034ca96ea86SBastien Nocera { 1035fafef982SMarcin Niestroj int x_max, y_max; 1036ca96ea86SBastien Nocera int error; 1037ca96ea86SBastien Nocera 103809182ed2SHans de Goede /* 103909182ed2SHans de Goede * On controllers where we need to upload the firmware 104009182ed2SHans de Goede * (controllers without flash) ts->config already has the config 104109182ed2SHans de Goede * at this point and the controller itself does not have it yet! 104209182ed2SHans de Goede */ 104309182ed2SHans de Goede if (!ts->firmware_name) { 104425309004SMarcin Niestroj error = goodix_i2c_read(ts->client, ts->chip->config_addr, 1045de956caeSHans de Goede ts->config, ts->chip->config_len); 1046ca96ea86SBastien Nocera if (error) { 1047ca96ea86SBastien Nocera ts->int_trigger_type = GOODIX_INT_TRIGGER; 1048a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 1049ca96ea86SBastien Nocera return; 1050ca96ea86SBastien Nocera } 105109182ed2SHans de Goede } 1052ca96ea86SBastien Nocera 1053de956caeSHans de Goede ts->int_trigger_type = ts->config[TRIGGER_LOC] & 0x03; 1054de956caeSHans de Goede ts->max_touch_num = ts->config[MAX_CONTACTS_LOC] & 0x0f; 10558b5a359cSBastien Nocera 1056de956caeSHans de Goede x_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC]); 1057de956caeSHans de Goede y_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC + 2]); 1058fafef982SMarcin Niestroj if (x_max && y_max) { 1059fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_X, x_max - 1); 1060fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_Y, y_max - 1); 1061ca96ea86SBastien Nocera } 1062de956caeSHans de Goede 1063de956caeSHans de Goede ts->chip->calc_config_checksum(ts); 106457c80e8eSKarsten Merker } 1065ca96ea86SBastien Nocera 1066ca96ea86SBastien Nocera /** 1067ca96ea86SBastien Nocera * goodix_read_version - Read goodix touchscreen version 1068ca96ea86SBastien Nocera * 106968caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 1070ca96ea86SBastien Nocera */ 107168caf858SIrina Tirdea static int goodix_read_version(struct goodix_ts_data *ts) 1072ca96ea86SBastien Nocera { 1073ca96ea86SBastien Nocera int error; 1074ca96ea86SBastien Nocera u8 buf[6]; 1075cae102e2SIcenowy Zheng char id_str[GOODIX_ID_MAX_LEN + 1]; 1076ca96ea86SBastien Nocera 107768caf858SIrina Tirdea error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf)); 10787642f29cSHans de Goede if (error) 1079ca96ea86SBastien Nocera return error; 1080ca96ea86SBastien Nocera 1081cae102e2SIcenowy Zheng memcpy(id_str, buf, GOODIX_ID_MAX_LEN); 1082cae102e2SIcenowy Zheng id_str[GOODIX_ID_MAX_LEN] = 0; 1083cae102e2SIcenowy Zheng strscpy(ts->id, id_str, GOODIX_ID_MAX_LEN + 1); 1084e70b0307SIrina Tirdea 108568caf858SIrina Tirdea ts->version = get_unaligned_le16(&buf[4]); 1086ca96ea86SBastien Nocera 1087cae102e2SIcenowy Zheng dev_info(&ts->client->dev, "ID %s, version: %04x\n", ts->id, 108868caf858SIrina Tirdea ts->version); 1089ca96ea86SBastien Nocera 1090ca96ea86SBastien Nocera return 0; 1091ca96ea86SBastien Nocera } 1092ca96ea86SBastien Nocera 1093ca96ea86SBastien Nocera /** 1094ca96ea86SBastien Nocera * goodix_i2c_test - I2C test function to check if the device answers. 1095ca96ea86SBastien Nocera * 1096ca96ea86SBastien Nocera * @client: the i2c client 1097ca96ea86SBastien Nocera */ 1098ca96ea86SBastien Nocera static int goodix_i2c_test(struct i2c_client *client) 1099ca96ea86SBastien Nocera { 1100ca96ea86SBastien Nocera int retry = 0; 1101ca96ea86SBastien Nocera int error; 1102ca96ea86SBastien Nocera u8 test; 1103ca96ea86SBastien Nocera 1104ca96ea86SBastien Nocera while (retry++ < 2) { 11057642f29cSHans de Goede error = goodix_i2c_read(client, GOODIX_REG_ID, &test, 1); 1106ca96ea86SBastien Nocera if (!error) 1107ca96ea86SBastien Nocera return 0; 1108ca96ea86SBastien Nocera 1109ca96ea86SBastien Nocera msleep(20); 1110ca96ea86SBastien Nocera } 1111ca96ea86SBastien Nocera 1112ca96ea86SBastien Nocera return error; 1113ca96ea86SBastien Nocera } 1114ca96ea86SBastien Nocera 1115ca96ea86SBastien Nocera /** 111668caf858SIrina Tirdea * goodix_configure_dev - Finish device initialization 111768caf858SIrina Tirdea * 111868caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 111968caf858SIrina Tirdea * 112068caf858SIrina Tirdea * Must be called from probe to finish initialization of the device. 112168caf858SIrina Tirdea * Contains the common initialization code for both devices that 112268caf858SIrina Tirdea * declare gpio pins and devices that do not. It is either called 112368caf858SIrina Tirdea * directly from probe or from request_firmware_wait callback. 112468caf858SIrina Tirdea */ 112568caf858SIrina Tirdea static int goodix_configure_dev(struct goodix_ts_data *ts) 112668caf858SIrina Tirdea { 112768caf858SIrina Tirdea int error; 1128492ee52cSDmitry Mastykin int i; 112968caf858SIrina Tirdea 1130fafef982SMarcin Niestroj ts->int_trigger_type = GOODIX_INT_TRIGGER; 1131fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 1132ad48cf5eSKarsten Merker 1133fafef982SMarcin Niestroj ts->input_dev = devm_input_allocate_device(&ts->client->dev); 1134fafef982SMarcin Niestroj if (!ts->input_dev) { 1135fafef982SMarcin Niestroj dev_err(&ts->client->dev, "Failed to allocate input device."); 1136fafef982SMarcin Niestroj return -ENOMEM; 1137fafef982SMarcin Niestroj } 1138fafef982SMarcin Niestroj 1139fafef982SMarcin Niestroj ts->input_dev->name = "Goodix Capacitive TouchScreen"; 1140fafef982SMarcin Niestroj ts->input_dev->phys = "input/ts"; 1141fafef982SMarcin Niestroj ts->input_dev->id.bustype = BUS_I2C; 1142fafef982SMarcin Niestroj ts->input_dev->id.vendor = 0x0416; 1143cae102e2SIcenowy Zheng if (kstrtou16(ts->id, 10, &ts->input_dev->id.product)) 1144cae102e2SIcenowy Zheng ts->input_dev->id.product = 0x1001; 1145fafef982SMarcin Niestroj ts->input_dev->id.version = ts->version; 1146fafef982SMarcin Niestroj 1147492ee52cSDmitry Mastykin ts->input_dev->keycode = ts->keymap; 1148492ee52cSDmitry Mastykin ts->input_dev->keycodesize = sizeof(ts->keymap[0]); 1149492ee52cSDmitry Mastykin ts->input_dev->keycodemax = GOODIX_MAX_KEYS; 1150492ee52cSDmitry Mastykin 1151fafef982SMarcin Niestroj /* Capacitive Windows/Home button on some devices */ 1152492ee52cSDmitry Mastykin for (i = 0; i < GOODIX_MAX_KEYS; ++i) { 1153492ee52cSDmitry Mastykin if (i == 0) 1154492ee52cSDmitry Mastykin ts->keymap[i] = KEY_LEFTMETA; 1155492ee52cSDmitry Mastykin else 1156492ee52cSDmitry Mastykin ts->keymap[i] = KEY_F1 + (i - 1); 1157492ee52cSDmitry Mastykin 1158492ee52cSDmitry Mastykin input_set_capability(ts->input_dev, EV_KEY, ts->keymap[i]); 1159492ee52cSDmitry Mastykin } 1160fafef982SMarcin Niestroj 1161fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X); 1162fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y); 1163fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 1164fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 1165fafef982SMarcin Niestroj 1166fafef982SMarcin Niestroj /* Read configuration and apply touchscreen parameters */ 116768caf858SIrina Tirdea goodix_read_config(ts); 116868caf858SIrina Tirdea 1169fafef982SMarcin Niestroj /* Try overriding touchscreen parameters via device properties */ 1170fafef982SMarcin Niestroj touchscreen_parse_properties(ts->input_dev, true, &ts->prop); 1171fafef982SMarcin Niestroj 1172fafef982SMarcin Niestroj if (!ts->prop.max_x || !ts->prop.max_y || !ts->max_touch_num) { 1173c1c00aa5SGuido Günther dev_err(&ts->client->dev, 1174c1c00aa5SGuido Günther "Invalid config (%d, %d, %d), using defaults\n", 1175c1c00aa5SGuido Günther ts->prop.max_x, ts->prop.max_y, ts->max_touch_num); 1176fafef982SMarcin Niestroj ts->prop.max_x = GOODIX_MAX_WIDTH - 1; 1177fafef982SMarcin Niestroj ts->prop.max_y = GOODIX_MAX_HEIGHT - 1; 1178fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 1179fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 1180fafef982SMarcin Niestroj ABS_MT_POSITION_X, ts->prop.max_x); 1181fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 1182fafef982SMarcin Niestroj ABS_MT_POSITION_Y, ts->prop.max_y); 1183fafef982SMarcin Niestroj } 1184fafef982SMarcin Niestroj 1185bd3b8480SYauhen Kharuzhy if (dmi_check_system(nine_bytes_report)) { 1186bd3b8480SYauhen Kharuzhy ts->contact_size = 9; 1187bd3b8480SYauhen Kharuzhy 1188bd3b8480SYauhen Kharuzhy dev_dbg(&ts->client->dev, 1189bd3b8480SYauhen Kharuzhy "Non-standard 9-bytes report format quirk\n"); 1190bd3b8480SYauhen Kharuzhy } 1191bd3b8480SYauhen Kharuzhy 11921dd5ddc1SSergei A. Trusov if (dmi_check_system(inverted_x_screen)) { 11931dd5ddc1SSergei A. Trusov ts->prop.invert_x = true; 11941dd5ddc1SSergei A. Trusov dev_dbg(&ts->client->dev, 11951dd5ddc1SSergei A. Trusov "Applying 'inverted x screen' quirk\n"); 11961dd5ddc1SSergei A. Trusov } 11971dd5ddc1SSergei A. Trusov 1198fafef982SMarcin Niestroj error = input_mt_init_slots(ts->input_dev, ts->max_touch_num, 1199fafef982SMarcin Niestroj INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); 1200fafef982SMarcin Niestroj if (error) { 1201fafef982SMarcin Niestroj dev_err(&ts->client->dev, 1202fafef982SMarcin Niestroj "Failed to initialize MT slots: %d", error); 120368caf858SIrina Tirdea return error; 1204fafef982SMarcin Niestroj } 1205fafef982SMarcin Niestroj 1206fafef982SMarcin Niestroj error = input_register_device(ts->input_dev); 1207fafef982SMarcin Niestroj if (error) { 1208fafef982SMarcin Niestroj dev_err(&ts->client->dev, 1209fafef982SMarcin Niestroj "Failed to register input device: %d", error); 1210fafef982SMarcin Niestroj return error; 1211fafef982SMarcin Niestroj } 121268caf858SIrina Tirdea 121365de58c2SHans de Goede /* 121465de58c2SHans de Goede * Create the input_pen device before goodix_request_irq() calls 121565de58c2SHans de Goede * devm_request_threaded_irq() so that the devm framework frees 121665de58c2SHans de Goede * it after disabling the irq. 121765de58c2SHans de Goede * Unfortunately there is no way to detect if the touchscreen has pen 121865de58c2SHans de Goede * support, so registering the dev is delayed till the first pen event. 121965de58c2SHans de Goede */ 122065de58c2SHans de Goede error = goodix_create_pen_input(ts); 122165de58c2SHans de Goede if (error) 122265de58c2SHans de Goede return error; 122365de58c2SHans de Goede 12245ab09d6aSIrina Tirdea ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT; 12255ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 122668caf858SIrina Tirdea if (error) { 122768caf858SIrina Tirdea dev_err(&ts->client->dev, "request IRQ failed: %d\n", error); 122868caf858SIrina Tirdea return error; 122968caf858SIrina Tirdea } 123068caf858SIrina Tirdea 123168caf858SIrina Tirdea return 0; 123268caf858SIrina Tirdea } 123368caf858SIrina Tirdea 123468caf858SIrina Tirdea /** 123568caf858SIrina Tirdea * goodix_config_cb - Callback to finish device init 123668caf858SIrina Tirdea * 1237cb690465SLee Jones * @cfg: firmware config 1238584da78cSLee Jones * @ctx: our goodix_ts_data pointer 123968caf858SIrina Tirdea * 124068caf858SIrina Tirdea * request_firmware_wait callback that finishes 124168caf858SIrina Tirdea * initialization of the device. 124268caf858SIrina Tirdea */ 124368caf858SIrina Tirdea static void goodix_config_cb(const struct firmware *cfg, void *ctx) 124468caf858SIrina Tirdea { 124568caf858SIrina Tirdea struct goodix_ts_data *ts = ctx; 124668caf858SIrina Tirdea int error; 124768caf858SIrina Tirdea 124809182ed2SHans de Goede if (ts->firmware_name) { 124909182ed2SHans de Goede if (!cfg) 125009182ed2SHans de Goede goto err_release_cfg; 125109182ed2SHans de Goede 125209182ed2SHans de Goede error = goodix_check_cfg(ts, cfg->data, cfg->size); 125309182ed2SHans de Goede if (error) 125409182ed2SHans de Goede goto err_release_cfg; 125509182ed2SHans de Goede 125609182ed2SHans de Goede memcpy(ts->config, cfg->data, cfg->size); 125709182ed2SHans de Goede } else if (cfg) { 125868caf858SIrina Tirdea /* send device configuration to the firmware */ 12591a67448fSHans de Goede error = goodix_send_cfg(ts, cfg->data, cfg->size); 126068caf858SIrina Tirdea if (error) 126168caf858SIrina Tirdea goto err_release_cfg; 126268caf858SIrina Tirdea } 126368caf858SIrina Tirdea 126468caf858SIrina Tirdea goodix_configure_dev(ts); 126568caf858SIrina Tirdea 126668caf858SIrina Tirdea err_release_cfg: 126768caf858SIrina Tirdea release_firmware(cfg); 126868caf858SIrina Tirdea complete_all(&ts->firmware_loading_complete); 126968caf858SIrina Tirdea } 127068caf858SIrina Tirdea 1271ae97fb58SJagan Teki static void goodix_disable_regulators(void *arg) 1272ae97fb58SJagan Teki { 1273ae97fb58SJagan Teki struct goodix_ts_data *ts = arg; 1274ae97fb58SJagan Teki 1275ae97fb58SJagan Teki regulator_disable(ts->vddio); 1276ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1277ae97fb58SJagan Teki } 1278ae97fb58SJagan Teki 1279ca96ea86SBastien Nocera static int goodix_ts_probe(struct i2c_client *client, 1280ca96ea86SBastien Nocera const struct i2c_device_id *id) 1281ca96ea86SBastien Nocera { 1282ca96ea86SBastien Nocera struct goodix_ts_data *ts; 128320e31722SHans de Goede const char *cfg_name; 1284ca96ea86SBastien Nocera int error; 1285ca96ea86SBastien Nocera 1286ca96ea86SBastien Nocera dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr); 1287ca96ea86SBastien Nocera 1288ca96ea86SBastien Nocera if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 1289ca96ea86SBastien Nocera dev_err(&client->dev, "I2C check functionality failed.\n"); 1290ca96ea86SBastien Nocera return -ENXIO; 1291ca96ea86SBastien Nocera } 1292ca96ea86SBastien Nocera 1293ca96ea86SBastien Nocera ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); 1294ca96ea86SBastien Nocera if (!ts) 1295ca96ea86SBastien Nocera return -ENOMEM; 1296ca96ea86SBastien Nocera 1297ca96ea86SBastien Nocera ts->client = client; 1298ca96ea86SBastien Nocera i2c_set_clientdata(client, ts); 129968caf858SIrina Tirdea init_completion(&ts->firmware_loading_complete); 1300bd3b8480SYauhen Kharuzhy ts->contact_size = GOODIX_CONTACT_SIZE; 1301ca96ea86SBastien Nocera 1302ec6e1b40SIrina Tirdea error = goodix_get_gpio_config(ts); 1303ec6e1b40SIrina Tirdea if (error) 1304ec6e1b40SIrina Tirdea return error; 1305ec6e1b40SIrina Tirdea 1306ae97fb58SJagan Teki /* power up the controller */ 1307ae97fb58SJagan Teki error = regulator_enable(ts->avdd28); 1308ae97fb58SJagan Teki if (error) { 1309ae97fb58SJagan Teki dev_err(&client->dev, 1310ae97fb58SJagan Teki "Failed to enable AVDD28 regulator: %d\n", 1311ae97fb58SJagan Teki error); 1312ae97fb58SJagan Teki return error; 1313ae97fb58SJagan Teki } 1314ae97fb58SJagan Teki 1315ae97fb58SJagan Teki error = regulator_enable(ts->vddio); 1316ae97fb58SJagan Teki if (error) { 1317ae97fb58SJagan Teki dev_err(&client->dev, 1318ae97fb58SJagan Teki "Failed to enable VDDIO regulator: %d\n", 1319ae97fb58SJagan Teki error); 1320ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1321ae97fb58SJagan Teki return error; 1322ae97fb58SJagan Teki } 1323ae97fb58SJagan Teki 1324ae97fb58SJagan Teki error = devm_add_action_or_reset(&client->dev, 1325ae97fb58SJagan Teki goodix_disable_regulators, ts); 1326ae97fb58SJagan Teki if (error) 1327ae97fb58SJagan Teki return error; 1328ae97fb58SJagan Teki 13299e1f2d70SHans de Goede reset: 13301921daceSHans de Goede if (ts->reset_controller_at_probe) { 1331ec6e1b40SIrina Tirdea /* reset the controller */ 1332ec6e1b40SIrina Tirdea error = goodix_reset(ts); 1333209bda47SHans de Goede if (error) 1334ec6e1b40SIrina Tirdea return error; 1335ec6e1b40SIrina Tirdea } 1336ec6e1b40SIrina Tirdea 1337ca96ea86SBastien Nocera error = goodix_i2c_test(client); 1338ca96ea86SBastien Nocera if (error) { 13399e1f2d70SHans de Goede if (!ts->reset_controller_at_probe && 13409e1f2d70SHans de Goede ts->irq_pin_access_method != IRQ_PIN_ACCESS_NONE) { 13419e1f2d70SHans de Goede /* Retry after a controller reset */ 13429e1f2d70SHans de Goede ts->reset_controller_at_probe = true; 13439e1f2d70SHans de Goede goto reset; 13449e1f2d70SHans de Goede } 1345ca96ea86SBastien Nocera dev_err(&client->dev, "I2C communication failure: %d\n", error); 1346ca96ea86SBastien Nocera return error; 1347ca96ea86SBastien Nocera } 1348ca96ea86SBastien Nocera 134909182ed2SHans de Goede error = goodix_firmware_check(ts); 135009182ed2SHans de Goede if (error) 135109182ed2SHans de Goede return error; 135209182ed2SHans de Goede 135368caf858SIrina Tirdea error = goodix_read_version(ts); 13547642f29cSHans de Goede if (error) 1355ca96ea86SBastien Nocera return error; 1356ca96ea86SBastien Nocera 135725309004SMarcin Niestroj ts->chip = goodix_get_chip_data(ts->id); 1358a779fbc6SIrina Tirdea 1359e070a97bSHans de Goede if (ts->load_cfg_from_disk) { 136068caf858SIrina Tirdea /* update device config */ 136120e31722SHans de Goede error = device_property_read_string(&client->dev, 136220e31722SHans de Goede "goodix,config-name", 136320e31722SHans de Goede &cfg_name); 136420e31722SHans de Goede if (!error) 136520e31722SHans de Goede snprintf(ts->cfg_name, sizeof(ts->cfg_name), 136620e31722SHans de Goede "goodix/%s", cfg_name); 136720e31722SHans de Goede else 136820e31722SHans de Goede snprintf(ts->cfg_name, sizeof(ts->cfg_name), 1369cae102e2SIcenowy Zheng "goodix_%s_cfg.bin", ts->id); 1370ca96ea86SBastien Nocera 137168caf858SIrina Tirdea error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name, 137268caf858SIrina Tirdea &client->dev, GFP_KERNEL, ts, 137368caf858SIrina Tirdea goodix_config_cb); 1374ca96ea86SBastien Nocera if (error) { 137568caf858SIrina Tirdea dev_err(&client->dev, 137668caf858SIrina Tirdea "Failed to invoke firmware loader: %d\n", 137768caf858SIrina Tirdea error); 1378ca96ea86SBastien Nocera return error; 1379ca96ea86SBastien Nocera } 1380ca96ea86SBastien Nocera 1381ca96ea86SBastien Nocera return 0; 138268caf858SIrina Tirdea } else { 138368caf858SIrina Tirdea error = goodix_configure_dev(ts); 138468caf858SIrina Tirdea if (error) 138568caf858SIrina Tirdea return error; 138668caf858SIrina Tirdea } 138768caf858SIrina Tirdea 138868caf858SIrina Tirdea return 0; 138968caf858SIrina Tirdea } 139068caf858SIrina Tirdea 139168caf858SIrina Tirdea static int goodix_ts_remove(struct i2c_client *client) 139268caf858SIrina Tirdea { 139368caf858SIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 139468caf858SIrina Tirdea 1395e070a97bSHans de Goede if (ts->load_cfg_from_disk) 139668caf858SIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 139768caf858SIrina Tirdea 139868caf858SIrina Tirdea return 0; 1399ca96ea86SBastien Nocera } 1400ca96ea86SBastien Nocera 14015ab09d6aSIrina Tirdea static int __maybe_unused goodix_suspend(struct device *dev) 14025ab09d6aSIrina Tirdea { 14035ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 14045ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 14055ab09d6aSIrina Tirdea int error; 14065ab09d6aSIrina Tirdea 1407e070a97bSHans de Goede if (ts->load_cfg_from_disk) 1408e070a97bSHans de Goede wait_for_completion(&ts->firmware_loading_complete); 1409e070a97bSHans de Goede 14105ab09d6aSIrina Tirdea /* We need gpio pins to suspend/resume */ 141149db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1412faec44b6SHans de Goede disable_irq(client->irq); 14135ab09d6aSIrina Tirdea return 0; 1414faec44b6SHans de Goede } 14155ab09d6aSIrina Tirdea 14165ab09d6aSIrina Tirdea /* Free IRQ as IRQ pin is used as output in the suspend sequence */ 14175ab09d6aSIrina Tirdea goodix_free_irq(ts); 14185ab09d6aSIrina Tirdea 141909182ed2SHans de Goede /* Save reference (calibration) info if necessary */ 142009182ed2SHans de Goede goodix_save_bak_ref(ts); 142109182ed2SHans de Goede 14225ab09d6aSIrina Tirdea /* Output LOW on the INT pin for 5 ms */ 142349db3997SHans de Goede error = goodix_irq_direction_output(ts, 0); 14245ab09d6aSIrina Tirdea if (error) { 14255ab09d6aSIrina Tirdea goodix_request_irq(ts); 14265ab09d6aSIrina Tirdea return error; 14275ab09d6aSIrina Tirdea } 14285ab09d6aSIrina Tirdea 14295ab09d6aSIrina Tirdea usleep_range(5000, 6000); 14305ab09d6aSIrina Tirdea 14315ab09d6aSIrina Tirdea error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND, 14325ab09d6aSIrina Tirdea GOODIX_CMD_SCREEN_OFF); 14335ab09d6aSIrina Tirdea if (error) { 143449db3997SHans de Goede goodix_irq_direction_input(ts); 14355ab09d6aSIrina Tirdea goodix_request_irq(ts); 14365ab09d6aSIrina Tirdea return -EAGAIN; 14375ab09d6aSIrina Tirdea } 14385ab09d6aSIrina Tirdea 14395ab09d6aSIrina Tirdea /* 14405ab09d6aSIrina Tirdea * The datasheet specifies that the interval between sending screen-off 14415ab09d6aSIrina Tirdea * command and wake-up should be longer than 58 ms. To avoid waking up 14425ab09d6aSIrina Tirdea * sooner, delay 58ms here. 14435ab09d6aSIrina Tirdea */ 14445ab09d6aSIrina Tirdea msleep(58); 14455ab09d6aSIrina Tirdea return 0; 14465ab09d6aSIrina Tirdea } 14475ab09d6aSIrina Tirdea 14485ab09d6aSIrina Tirdea static int __maybe_unused goodix_resume(struct device *dev) 14495ab09d6aSIrina Tirdea { 14505ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 14515ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 1452273ec6bdSHans de Goede u8 config_ver; 14535ab09d6aSIrina Tirdea int error; 14545ab09d6aSIrina Tirdea 145549db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1456faec44b6SHans de Goede enable_irq(client->irq); 14575ab09d6aSIrina Tirdea return 0; 1458faec44b6SHans de Goede } 14595ab09d6aSIrina Tirdea 14605ab09d6aSIrina Tirdea /* 14615ab09d6aSIrina Tirdea * Exit sleep mode by outputting HIGH level to INT pin 14625ab09d6aSIrina Tirdea * for 2ms~5ms. 14635ab09d6aSIrina Tirdea */ 146449db3997SHans de Goede error = goodix_irq_direction_output(ts, 1); 14655ab09d6aSIrina Tirdea if (error) 14665ab09d6aSIrina Tirdea return error; 14675ab09d6aSIrina Tirdea 14685ab09d6aSIrina Tirdea usleep_range(2000, 5000); 14695ab09d6aSIrina Tirdea 14705ab09d6aSIrina Tirdea error = goodix_int_sync(ts); 14715ab09d6aSIrina Tirdea if (error) 14725ab09d6aSIrina Tirdea return error; 14735ab09d6aSIrina Tirdea 1474273ec6bdSHans de Goede error = goodix_i2c_read(ts->client, ts->chip->config_addr, 1475273ec6bdSHans de Goede &config_ver, 1); 14767642f29cSHans de Goede if (!error && config_ver != ts->config[0]) 1477273ec6bdSHans de Goede dev_info(dev, "Config version mismatch %d != %d, resetting controller\n", 1478273ec6bdSHans de Goede config_ver, ts->config[0]); 1479273ec6bdSHans de Goede 1480273ec6bdSHans de Goede if (error != 0 || config_ver != ts->config[0]) { 1481273ec6bdSHans de Goede error = goodix_reset(ts); 1482209bda47SHans de Goede if (error) 1483273ec6bdSHans de Goede return error; 1484273ec6bdSHans de Goede 1485273ec6bdSHans de Goede error = goodix_send_cfg(ts, ts->config, ts->chip->config_len); 1486273ec6bdSHans de Goede if (error) 1487273ec6bdSHans de Goede return error; 1488273ec6bdSHans de Goede } 1489273ec6bdSHans de Goede 14905ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 14915ab09d6aSIrina Tirdea if (error) 14925ab09d6aSIrina Tirdea return error; 14935ab09d6aSIrina Tirdea 14945ab09d6aSIrina Tirdea return 0; 14955ab09d6aSIrina Tirdea } 14965ab09d6aSIrina Tirdea 14975ab09d6aSIrina Tirdea static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume); 14985ab09d6aSIrina Tirdea 1499ca96ea86SBastien Nocera static const struct i2c_device_id goodix_ts_id[] = { 1500ca96ea86SBastien Nocera { "GDIX1001:00", 0 }, 1501ca96ea86SBastien Nocera { } 1502ca96ea86SBastien Nocera }; 15032e9e910eSJavier Martinez Canillas MODULE_DEVICE_TABLE(i2c, goodix_ts_id); 1504ca96ea86SBastien Nocera 1505771d8f1bSAleksei Mamlin #ifdef CONFIG_ACPI 1506ca96ea86SBastien Nocera static const struct acpi_device_id goodix_acpi_match[] = { 1507ca96ea86SBastien Nocera { "GDIX1001", 0 }, 15085ca4d1aeSEthan Lee { "GDIX1002", 0 }, 1509ca96ea86SBastien Nocera { } 1510ca96ea86SBastien Nocera }; 1511ca96ea86SBastien Nocera MODULE_DEVICE_TABLE(acpi, goodix_acpi_match); 1512771d8f1bSAleksei Mamlin #endif 1513771d8f1bSAleksei Mamlin 1514771d8f1bSAleksei Mamlin #ifdef CONFIG_OF 1515771d8f1bSAleksei Mamlin static const struct of_device_id goodix_of_match[] = { 151625309004SMarcin Niestroj { .compatible = "goodix,gt1151" }, 1517a5f50c50SJagan Teki { .compatible = "goodix,gt5663" }, 151884ef1b33SGuido Günther { .compatible = "goodix,gt5688" }, 1519771d8f1bSAleksei Mamlin { .compatible = "goodix,gt911" }, 1520771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9110" }, 1521771d8f1bSAleksei Mamlin { .compatible = "goodix,gt912" }, 1522b9a1c116SYannick Fertre { .compatible = "goodix,gt9147" }, 1523b5e458afSIcenowy Zheng { .compatible = "goodix,gt917s" }, 1524771d8f1bSAleksei Mamlin { .compatible = "goodix,gt927" }, 1525771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9271" }, 1526771d8f1bSAleksei Mamlin { .compatible = "goodix,gt928" }, 15272dce6db7SAngeloGioacchino Del Regno { .compatible = "goodix,gt9286" }, 1528771d8f1bSAleksei Mamlin { .compatible = "goodix,gt967" }, 1529771d8f1bSAleksei Mamlin { } 1530771d8f1bSAleksei Mamlin }; 1531771d8f1bSAleksei Mamlin MODULE_DEVICE_TABLE(of, goodix_of_match); 1532771d8f1bSAleksei Mamlin #endif 1533ca96ea86SBastien Nocera 1534ca96ea86SBastien Nocera static struct i2c_driver goodix_ts_driver = { 1535ca96ea86SBastien Nocera .probe = goodix_ts_probe, 153668caf858SIrina Tirdea .remove = goodix_ts_remove, 1537ca96ea86SBastien Nocera .id_table = goodix_ts_id, 1538ca96ea86SBastien Nocera .driver = { 1539ca96ea86SBastien Nocera .name = "Goodix-TS", 1540771d8f1bSAleksei Mamlin .acpi_match_table = ACPI_PTR(goodix_acpi_match), 1541771d8f1bSAleksei Mamlin .of_match_table = of_match_ptr(goodix_of_match), 15425ab09d6aSIrina Tirdea .pm = &goodix_pm_ops, 1543ca96ea86SBastien Nocera }, 1544ca96ea86SBastien Nocera }; 1545ca96ea86SBastien Nocera module_i2c_driver(goodix_ts_driver); 1546ca96ea86SBastien Nocera 1547ca96ea86SBastien Nocera MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); 1548ca96ea86SBastien Nocera MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>"); 1549ca96ea86SBastien Nocera MODULE_DESCRIPTION("Goodix touchscreen driver"); 1550ca96ea86SBastien Nocera MODULE_LICENSE("GPL v2"); 1551