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> 21*d176708fSHans 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 3015ede7f0cSHans de Goede static struct input_dev *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) 3085ede7f0cSHans de Goede return NULL; 3095ede7f0cSHans de Goede 3105ede7f0cSHans de Goede input_alloc_absinfo(input); 3115ede7f0cSHans de Goede if (!input->absinfo) { 3125ede7f0cSHans de Goede input_free_device(input); 3135ede7f0cSHans de Goede return NULL; 3145ede7f0cSHans de Goede } 3155ede7f0cSHans de Goede 3165ede7f0cSHans de Goede input->absinfo[ABS_X] = ts->input_dev->absinfo[ABS_MT_POSITION_X]; 3175ede7f0cSHans de Goede input->absinfo[ABS_Y] = ts->input_dev->absinfo[ABS_MT_POSITION_Y]; 3185ede7f0cSHans de Goede __set_bit(ABS_X, input->absbit); 3195ede7f0cSHans de Goede __set_bit(ABS_Y, input->absbit); 3205ede7f0cSHans de Goede input_set_abs_params(input, ABS_PRESSURE, 0, 255, 0, 0); 3215ede7f0cSHans de Goede 3225ede7f0cSHans de Goede input_set_capability(input, EV_KEY, BTN_TOUCH); 3235ede7f0cSHans de Goede input_set_capability(input, EV_KEY, BTN_TOOL_PEN); 3245ede7f0cSHans de Goede input_set_capability(input, EV_KEY, BTN_STYLUS); 3255ede7f0cSHans de Goede input_set_capability(input, EV_KEY, BTN_STYLUS2); 3265ede7f0cSHans de Goede __set_bit(INPUT_PROP_DIRECT, input->propbit); 3275ede7f0cSHans de Goede /* 3285ede7f0cSHans de Goede * The resolution of these touchscreens is about 10 units/mm, the actual 3295ede7f0cSHans de Goede * resolution does not matter much since we set INPUT_PROP_DIRECT. 3305ede7f0cSHans de Goede * Userspace wants something here though, so just set it to 10 units/mm. 3315ede7f0cSHans de Goede */ 3325ede7f0cSHans de Goede input_abs_set_res(input, ABS_X, 10); 3335ede7f0cSHans de Goede input_abs_set_res(input, ABS_Y, 10); 3345ede7f0cSHans de Goede 3355ede7f0cSHans de Goede input->name = "Goodix Active Pen"; 3365ede7f0cSHans de Goede input->phys = "input/pen"; 3375ede7f0cSHans de Goede input->id.bustype = BUS_I2C; 33871f4ecd5SHans de Goede input->id.vendor = 0x0416; 3395ede7f0cSHans de Goede if (kstrtou16(ts->id, 10, &input->id.product)) 3405ede7f0cSHans de Goede input->id.product = 0x1001; 3415ede7f0cSHans de Goede input->id.version = ts->version; 3425ede7f0cSHans de Goede 3435ede7f0cSHans de Goede if (input_register_device(input) != 0) { 3445ede7f0cSHans de Goede input_free_device(input); 3455ede7f0cSHans de Goede return NULL; 3465ede7f0cSHans de Goede } 3475ede7f0cSHans de Goede 3485ede7f0cSHans de Goede return input; 3495ede7f0cSHans de Goede } 3505ede7f0cSHans de Goede 3515ede7f0cSHans de Goede static void goodix_ts_report_pen_down(struct goodix_ts_data *ts, u8 *data) 3525ede7f0cSHans de Goede { 3535ede7f0cSHans de Goede int input_x, input_y, input_w; 3545ede7f0cSHans de Goede u8 key_value; 3555ede7f0cSHans de Goede 3565ede7f0cSHans de Goede if (!ts->input_pen) { 3575ede7f0cSHans de Goede ts->input_pen = goodix_create_pen_input(ts); 3585ede7f0cSHans de Goede if (!ts->input_pen) 3595ede7f0cSHans de Goede return; 3605ede7f0cSHans de Goede } 3615ede7f0cSHans de Goede 3625ede7f0cSHans de Goede if (ts->contact_size == 9) { 3635ede7f0cSHans de Goede input_x = get_unaligned_le16(&data[4]); 3645ede7f0cSHans de Goede input_y = get_unaligned_le16(&data[6]); 3655ede7f0cSHans de Goede input_w = get_unaligned_le16(&data[8]); 3665ede7f0cSHans de Goede } else { 3675ede7f0cSHans de Goede input_x = get_unaligned_le16(&data[2]); 3685ede7f0cSHans de Goede input_y = get_unaligned_le16(&data[4]); 3695ede7f0cSHans de Goede input_w = get_unaligned_le16(&data[6]); 3705ede7f0cSHans de Goede } 3715ede7f0cSHans de Goede 3725ede7f0cSHans de Goede touchscreen_report_pos(ts->input_pen, &ts->prop, input_x, input_y, false); 3735ede7f0cSHans de Goede input_report_abs(ts->input_pen, ABS_PRESSURE, input_w); 3745ede7f0cSHans de Goede 3755ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_TOUCH, 1); 3765ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_TOOL_PEN, 1); 3775ede7f0cSHans de Goede 3785ede7f0cSHans de Goede if (data[0] & GOODIX_HAVE_KEY) { 3795ede7f0cSHans de Goede key_value = data[1 + ts->contact_size]; 3805ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_STYLUS, key_value & 0x10); 3815ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_STYLUS2, key_value & 0x20); 3825ede7f0cSHans de Goede } else { 3835ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_STYLUS, 0); 3845ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_STYLUS2, 0); 3855ede7f0cSHans de Goede } 3865ede7f0cSHans de Goede 3875ede7f0cSHans de Goede input_sync(ts->input_pen); 3885ede7f0cSHans de Goede } 3895ede7f0cSHans de Goede 3905ede7f0cSHans de Goede static void goodix_ts_report_pen_up(struct goodix_ts_data *ts) 3915ede7f0cSHans de Goede { 3925ede7f0cSHans de Goede if (!ts->input_pen) 3935ede7f0cSHans de Goede return; 3945ede7f0cSHans de Goede 3955ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_TOUCH, 0); 3965ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_TOOL_PEN, 0); 3975ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_STYLUS, 0); 3985ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_STYLUS2, 0); 3995ede7f0cSHans de Goede 4005ede7f0cSHans de Goede input_sync(ts->input_pen); 4015ede7f0cSHans de Goede } 4025ede7f0cSHans de Goede 403bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_8b(struct goodix_ts_data *ts, u8 *coor_data) 404ca96ea86SBastien Nocera { 405ca96ea86SBastien Nocera int id = coor_data[0] & 0x0F; 406ca96ea86SBastien Nocera int input_x = get_unaligned_le16(&coor_data[1]); 407ca96ea86SBastien Nocera int input_y = get_unaligned_le16(&coor_data[3]); 408ca96ea86SBastien Nocera int input_w = get_unaligned_le16(&coor_data[5]); 409ca96ea86SBastien Nocera 410ca96ea86SBastien Nocera input_mt_slot(ts->input_dev, id); 411ca96ea86SBastien Nocera input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 412fafef982SMarcin Niestroj touchscreen_report_pos(ts->input_dev, &ts->prop, 413fafef982SMarcin Niestroj input_x, input_y, true); 414ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 415ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 416ca96ea86SBastien Nocera } 417ca96ea86SBastien Nocera 418bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_9b(struct goodix_ts_data *ts, u8 *coor_data) 419bd3b8480SYauhen Kharuzhy { 420bd3b8480SYauhen Kharuzhy int id = coor_data[1] & 0x0F; 421bd3b8480SYauhen Kharuzhy int input_x = get_unaligned_le16(&coor_data[3]); 422bd3b8480SYauhen Kharuzhy int input_y = get_unaligned_le16(&coor_data[5]); 423bd3b8480SYauhen Kharuzhy int input_w = get_unaligned_le16(&coor_data[7]); 424bd3b8480SYauhen Kharuzhy 425bd3b8480SYauhen Kharuzhy input_mt_slot(ts->input_dev, id); 426bd3b8480SYauhen Kharuzhy input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 427bd3b8480SYauhen Kharuzhy touchscreen_report_pos(ts->input_dev, &ts->prop, 428bd3b8480SYauhen Kharuzhy input_x, input_y, true); 429bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 430bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 431bd3b8480SYauhen Kharuzhy } 432bd3b8480SYauhen Kharuzhy 4335ede7f0cSHans de Goede static void goodix_ts_release_keys(struct goodix_ts_data *ts) 4345ede7f0cSHans de Goede { 4355ede7f0cSHans de Goede int i; 4365ede7f0cSHans de Goede 4375ede7f0cSHans de Goede for (i = 0; i < GOODIX_MAX_KEYS; i++) 4385ede7f0cSHans de Goede input_report_key(ts->input_dev, ts->keymap[i], 0); 4395ede7f0cSHans de Goede } 4405ede7f0cSHans de Goede 441492ee52cSDmitry Mastykin static void goodix_ts_report_key(struct goodix_ts_data *ts, u8 *data) 442492ee52cSDmitry Mastykin { 443492ee52cSDmitry Mastykin int touch_num; 444492ee52cSDmitry Mastykin u8 key_value; 445492ee52cSDmitry Mastykin int i; 446492ee52cSDmitry Mastykin 447492ee52cSDmitry Mastykin if (data[0] & GOODIX_HAVE_KEY) { 448492ee52cSDmitry Mastykin touch_num = data[0] & 0x0f; 449492ee52cSDmitry Mastykin key_value = data[1 + ts->contact_size * touch_num]; 450492ee52cSDmitry Mastykin for (i = 0; i < GOODIX_MAX_KEYS; i++) 451492ee52cSDmitry Mastykin if (key_value & BIT(i)) 452492ee52cSDmitry Mastykin input_report_key(ts->input_dev, 453492ee52cSDmitry Mastykin ts->keymap[i], 1); 454492ee52cSDmitry Mastykin } else { 4555ede7f0cSHans de Goede goodix_ts_release_keys(ts); 456492ee52cSDmitry Mastykin } 457492ee52cSDmitry Mastykin } 458492ee52cSDmitry Mastykin 459ca96ea86SBastien Nocera /** 460ca96ea86SBastien Nocera * goodix_process_events - Process incoming events 461ca96ea86SBastien Nocera * 462ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 463ca96ea86SBastien Nocera * 464ca96ea86SBastien Nocera * Called when the IRQ is triggered. Read the current device state, and push 465ca96ea86SBastien Nocera * the input events to the user space. 466ca96ea86SBastien Nocera */ 467ca96ea86SBastien Nocera static void goodix_process_events(struct goodix_ts_data *ts) 468ca96ea86SBastien Nocera { 469492ee52cSDmitry Mastykin u8 point_data[2 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS]; 470ca96ea86SBastien Nocera int touch_num; 471ca96ea86SBastien Nocera int i; 472ca96ea86SBastien Nocera 473ca96ea86SBastien Nocera touch_num = goodix_ts_read_input_report(ts, point_data); 474ca96ea86SBastien Nocera if (touch_num < 0) 475ca96ea86SBastien Nocera return; 476ca96ea86SBastien Nocera 4775ede7f0cSHans de Goede /* The pen being down is always reported as a single touch */ 4785ede7f0cSHans de Goede if (touch_num == 1 && (point_data[1] & 0x80)) { 4795ede7f0cSHans de Goede goodix_ts_report_pen_down(ts, point_data); 4805ede7f0cSHans de Goede goodix_ts_release_keys(ts); 48171f4ecd5SHans de Goede goto sync; /* Release any previously registered touches */ 4825ede7f0cSHans de Goede } else { 4835ede7f0cSHans de Goede goodix_ts_report_pen_up(ts); 4845ede7f0cSHans de Goede } 4855ede7f0cSHans de Goede 486492ee52cSDmitry Mastykin goodix_ts_report_key(ts, point_data); 4874a54feeaSSergei A. Trusov 488ca96ea86SBastien Nocera for (i = 0; i < touch_num; i++) 489bd3b8480SYauhen Kharuzhy if (ts->contact_size == 9) 490bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_9b(ts, 491bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 492bd3b8480SYauhen Kharuzhy else 493bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_8b(ts, 494bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 495ca96ea86SBastien Nocera 4965ede7f0cSHans de Goede sync: 497ca96ea86SBastien Nocera input_mt_sync_frame(ts->input_dev); 498ca96ea86SBastien Nocera input_sync(ts->input_dev); 499ca96ea86SBastien Nocera } 500ca96ea86SBastien Nocera 501ca96ea86SBastien Nocera /** 502ca96ea86SBastien Nocera * goodix_ts_irq_handler - The IRQ handler 503ca96ea86SBastien Nocera * 504ca96ea86SBastien Nocera * @irq: interrupt number. 505ca96ea86SBastien Nocera * @dev_id: private data pointer. 506ca96ea86SBastien Nocera */ 507ca96ea86SBastien Nocera static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id) 508ca96ea86SBastien Nocera { 509ca96ea86SBastien Nocera struct goodix_ts_data *ts = dev_id; 510ca96ea86SBastien Nocera 511ca96ea86SBastien Nocera goodix_process_events(ts); 5127642f29cSHans de Goede goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0); 513ca96ea86SBastien Nocera 514ca96ea86SBastien Nocera return IRQ_HANDLED; 515ca96ea86SBastien Nocera } 516ca96ea86SBastien Nocera 5175ab09d6aSIrina Tirdea static void goodix_free_irq(struct goodix_ts_data *ts) 5185ab09d6aSIrina Tirdea { 5195ab09d6aSIrina Tirdea devm_free_irq(&ts->client->dev, ts->client->irq, ts); 5205ab09d6aSIrina Tirdea } 5215ab09d6aSIrina Tirdea 5225ab09d6aSIrina Tirdea static int goodix_request_irq(struct goodix_ts_data *ts) 5235ab09d6aSIrina Tirdea { 5245ab09d6aSIrina Tirdea return devm_request_threaded_irq(&ts->client->dev, ts->client->irq, 5255ab09d6aSIrina Tirdea NULL, goodix_ts_irq_handler, 5265ab09d6aSIrina Tirdea ts->irq_flags, ts->client->name, ts); 5275ab09d6aSIrina Tirdea } 5285ab09d6aSIrina Tirdea 5291a67448fSHans de Goede static int goodix_check_cfg_8(struct goodix_ts_data *ts, const u8 *cfg, int len) 53068caf858SIrina Tirdea { 5311a67448fSHans de Goede int i, raw_cfg_len = len - 2; 53268caf858SIrina Tirdea u8 check_sum = 0; 53368caf858SIrina Tirdea 53468caf858SIrina Tirdea for (i = 0; i < raw_cfg_len; i++) 5351a67448fSHans de Goede check_sum += cfg[i]; 53668caf858SIrina Tirdea check_sum = (~check_sum) + 1; 5371a67448fSHans de Goede if (check_sum != cfg[raw_cfg_len]) { 53868caf858SIrina Tirdea dev_err(&ts->client->dev, 53968caf858SIrina Tirdea "The checksum of the config fw is not correct"); 54068caf858SIrina Tirdea return -EINVAL; 54168caf858SIrina Tirdea } 54268caf858SIrina Tirdea 5431a67448fSHans de Goede if (cfg[raw_cfg_len + 1] != 1) { 54468caf858SIrina Tirdea dev_err(&ts->client->dev, 54568caf858SIrina Tirdea "Config fw must have Config_Fresh register set"); 54668caf858SIrina Tirdea return -EINVAL; 54768caf858SIrina Tirdea } 54868caf858SIrina Tirdea 54968caf858SIrina Tirdea return 0; 55068caf858SIrina Tirdea } 55168caf858SIrina Tirdea 552de956caeSHans de Goede static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts) 553de956caeSHans de Goede { 554de956caeSHans de Goede int i, raw_cfg_len = ts->chip->config_len - 2; 555de956caeSHans de Goede u8 check_sum = 0; 556de956caeSHans de Goede 557de956caeSHans de Goede for (i = 0; i < raw_cfg_len; i++) 558de956caeSHans de Goede check_sum += ts->config[i]; 559de956caeSHans de Goede check_sum = (~check_sum) + 1; 560de956caeSHans de Goede 561de956caeSHans de Goede ts->config[raw_cfg_len] = check_sum; 562de956caeSHans de Goede ts->config[raw_cfg_len + 1] = 1; /* Set "config_fresh" bit */ 563de956caeSHans de Goede } 564de956caeSHans de Goede 5651a67448fSHans de Goede static int goodix_check_cfg_16(struct goodix_ts_data *ts, const u8 *cfg, 5661a67448fSHans de Goede int len) 56725309004SMarcin Niestroj { 5681a67448fSHans de Goede int i, raw_cfg_len = len - 3; 56925309004SMarcin Niestroj u16 check_sum = 0; 57025309004SMarcin Niestroj 57125309004SMarcin Niestroj for (i = 0; i < raw_cfg_len; i += 2) 5721a67448fSHans de Goede check_sum += get_unaligned_be16(&cfg[i]); 57325309004SMarcin Niestroj check_sum = (~check_sum) + 1; 5741a67448fSHans de Goede if (check_sum != get_unaligned_be16(&cfg[raw_cfg_len])) { 57525309004SMarcin Niestroj dev_err(&ts->client->dev, 57625309004SMarcin Niestroj "The checksum of the config fw is not correct"); 57725309004SMarcin Niestroj return -EINVAL; 57825309004SMarcin Niestroj } 57925309004SMarcin Niestroj 5801a67448fSHans de Goede if (cfg[raw_cfg_len + 2] != 1) { 58125309004SMarcin Niestroj dev_err(&ts->client->dev, 58225309004SMarcin Niestroj "Config fw must have Config_Fresh register set"); 58325309004SMarcin Niestroj return -EINVAL; 58425309004SMarcin Niestroj } 58525309004SMarcin Niestroj 58625309004SMarcin Niestroj return 0; 58725309004SMarcin Niestroj } 58825309004SMarcin Niestroj 589de956caeSHans de Goede static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts) 590de956caeSHans de Goede { 591de956caeSHans de Goede int i, raw_cfg_len = ts->chip->config_len - 3; 592de956caeSHans de Goede u16 check_sum = 0; 593de956caeSHans de Goede 594de956caeSHans de Goede for (i = 0; i < raw_cfg_len; i += 2) 595de956caeSHans de Goede check_sum += get_unaligned_be16(&ts->config[i]); 596de956caeSHans de Goede check_sum = (~check_sum) + 1; 597de956caeSHans de Goede 598de956caeSHans de Goede put_unaligned_be16(check_sum, &ts->config[raw_cfg_len]); 599de956caeSHans de Goede ts->config[raw_cfg_len + 2] = 1; /* Set "config_fresh" bit */ 600de956caeSHans de Goede } 601de956caeSHans de Goede 60225309004SMarcin Niestroj /** 60325309004SMarcin Niestroj * goodix_check_cfg - Checks if config fw is valid 60425309004SMarcin Niestroj * 60525309004SMarcin Niestroj * @ts: goodix_ts_data pointer 60625309004SMarcin Niestroj * @cfg: firmware config data 607cb690465SLee Jones * @len: config data length 60825309004SMarcin Niestroj */ 6091a67448fSHans de Goede static int goodix_check_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) 61025309004SMarcin Niestroj { 6111a67448fSHans de Goede if (len < GOODIX_CONFIG_MIN_LENGTH || 6121a67448fSHans de Goede len > GOODIX_CONFIG_MAX_LENGTH) { 61325309004SMarcin Niestroj dev_err(&ts->client->dev, 61425309004SMarcin Niestroj "The length of the config fw is not correct"); 61525309004SMarcin Niestroj return -EINVAL; 61625309004SMarcin Niestroj } 61725309004SMarcin Niestroj 6181a67448fSHans de Goede return ts->chip->check_config(ts, cfg, len); 61925309004SMarcin Niestroj } 62025309004SMarcin Niestroj 62168caf858SIrina Tirdea /** 62268caf858SIrina Tirdea * goodix_send_cfg - Write fw config to device 62368caf858SIrina Tirdea * 62468caf858SIrina Tirdea * @ts: goodix_ts_data pointer 62568caf858SIrina Tirdea * @cfg: config firmware to write to device 626cb690465SLee Jones * @len: config data length 62768caf858SIrina Tirdea */ 628a2233cb7SHans de Goede int goodix_send_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) 62968caf858SIrina Tirdea { 63068caf858SIrina Tirdea int error; 63168caf858SIrina Tirdea 6321a67448fSHans de Goede error = goodix_check_cfg(ts, cfg, len); 63368caf858SIrina Tirdea if (error) 63468caf858SIrina Tirdea return error; 63568caf858SIrina Tirdea 6361a67448fSHans de Goede error = goodix_i2c_write(ts->client, ts->chip->config_addr, cfg, len); 6377642f29cSHans de Goede if (error) 63868caf858SIrina Tirdea return error; 6397642f29cSHans de Goede 64068caf858SIrina Tirdea dev_dbg(&ts->client->dev, "Config sent successfully."); 64168caf858SIrina Tirdea 64268caf858SIrina Tirdea /* Let the firmware reconfigure itself, so sleep for 10ms */ 64368caf858SIrina Tirdea usleep_range(10000, 11000); 64468caf858SIrina Tirdea 64568caf858SIrina Tirdea return 0; 64668caf858SIrina Tirdea } 64768caf858SIrina Tirdea 648c9c20ee3SHans de Goede #ifdef ACPI_GPIO_SUPPORT 649c9c20ee3SHans de Goede static int goodix_pin_acpi_direction_input(struct goodix_ts_data *ts) 65049db3997SHans de Goede { 651c9c20ee3SHans de Goede acpi_handle handle = ACPI_HANDLE(&ts->client->dev); 652c5fca485SHans de Goede acpi_status status; 653c5fca485SHans de Goede 654c9c20ee3SHans de Goede status = acpi_evaluate_object(handle, "INTI", NULL, NULL); 655c9c20ee3SHans de Goede return ACPI_SUCCESS(status) ? 0 : -EIO; 656c9c20ee3SHans de Goede } 657c9c20ee3SHans de Goede 658c9c20ee3SHans de Goede static int goodix_pin_acpi_output_method(struct goodix_ts_data *ts, int value) 659c9c20ee3SHans de Goede { 660c9c20ee3SHans de Goede acpi_handle handle = ACPI_HANDLE(&ts->client->dev); 661c9c20ee3SHans de Goede acpi_status status; 662c9c20ee3SHans de Goede 663c9c20ee3SHans de Goede status = acpi_execute_simple_method(handle, "INTO", value); 664c9c20ee3SHans de Goede return ACPI_SUCCESS(status) ? 0 : -EIO; 665c9c20ee3SHans de Goede } 666c9c20ee3SHans de Goede #else 667c9c20ee3SHans de Goede static int goodix_pin_acpi_direction_input(struct goodix_ts_data *ts) 668c9c20ee3SHans de Goede { 669c9c20ee3SHans de Goede dev_err(&ts->client->dev, 670c9c20ee3SHans de Goede "%s called on device without ACPI support\n", __func__); 671c9c20ee3SHans de Goede return -EINVAL; 672c9c20ee3SHans de Goede } 673c9c20ee3SHans de Goede 674c9c20ee3SHans de Goede static int goodix_pin_acpi_output_method(struct goodix_ts_data *ts, int value) 675c9c20ee3SHans de Goede { 676c9c20ee3SHans de Goede dev_err(&ts->client->dev, 677c9c20ee3SHans de Goede "%s called on device without ACPI support\n", __func__); 678c9c20ee3SHans de Goede return -EINVAL; 679c9c20ee3SHans de Goede } 680c9c20ee3SHans de Goede #endif 681c9c20ee3SHans de Goede 682c9c20ee3SHans de Goede static int goodix_irq_direction_output(struct goodix_ts_data *ts, int value) 683c9c20ee3SHans de Goede { 68449db3997SHans de Goede switch (ts->irq_pin_access_method) { 68549db3997SHans de Goede case IRQ_PIN_ACCESS_NONE: 68649db3997SHans de Goede dev_err(&ts->client->dev, 68749db3997SHans de Goede "%s called without an irq_pin_access_method set\n", 68849db3997SHans de Goede __func__); 68949db3997SHans de Goede return -EINVAL; 69049db3997SHans de Goede case IRQ_PIN_ACCESS_GPIO: 69149db3997SHans de Goede return gpiod_direction_output(ts->gpiod_int, value); 692a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 693a7d4b171SHans de Goede /* 694a7d4b171SHans de Goede * The IRQ pin triggers on a falling edge, so its gets marked 695a7d4b171SHans de Goede * as active-low, use output_raw to avoid the value inversion. 696a7d4b171SHans de Goede */ 697a7d4b171SHans de Goede return gpiod_direction_output_raw(ts->gpiod_int, value); 698c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 699c9c20ee3SHans de Goede return goodix_pin_acpi_output_method(ts, value); 70049db3997SHans de Goede } 70149db3997SHans de Goede 70249db3997SHans de Goede return -EINVAL; /* Never reached */ 70349db3997SHans de Goede } 70449db3997SHans de Goede 70549db3997SHans de Goede static int goodix_irq_direction_input(struct goodix_ts_data *ts) 70649db3997SHans de Goede { 70749db3997SHans de Goede switch (ts->irq_pin_access_method) { 70849db3997SHans de Goede case IRQ_PIN_ACCESS_NONE: 70949db3997SHans de Goede dev_err(&ts->client->dev, 71049db3997SHans de Goede "%s called without an irq_pin_access_method set\n", 71149db3997SHans de Goede __func__); 71249db3997SHans de Goede return -EINVAL; 71349db3997SHans de Goede case IRQ_PIN_ACCESS_GPIO: 714c9c20ee3SHans de Goede return gpiod_direction_input(ts->gpiod_int); 715a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 71649db3997SHans de Goede return gpiod_direction_input(ts->gpiod_int); 717c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 718c9c20ee3SHans de Goede return goodix_pin_acpi_direction_input(ts); 71949db3997SHans de Goede } 72049db3997SHans de Goede 72149db3997SHans de Goede return -EINVAL; /* Never reached */ 72249db3997SHans de Goede } 72349db3997SHans de Goede 724a2233cb7SHans de Goede int goodix_int_sync(struct goodix_ts_data *ts) 725ec6e1b40SIrina Tirdea { 726ec6e1b40SIrina Tirdea int error; 727ec6e1b40SIrina Tirdea 72849db3997SHans de Goede error = goodix_irq_direction_output(ts, 0); 729ec6e1b40SIrina Tirdea if (error) 730209bda47SHans de Goede goto error; 731ec6e1b40SIrina Tirdea 732ec6e1b40SIrina Tirdea msleep(50); /* T5: 50ms */ 733ec6e1b40SIrina Tirdea 73449db3997SHans de Goede error = goodix_irq_direction_input(ts); 735ec6e1b40SIrina Tirdea if (error) 736209bda47SHans de Goede goto error; 737ec6e1b40SIrina Tirdea 738ec6e1b40SIrina Tirdea return 0; 739209bda47SHans de Goede 740209bda47SHans de Goede error: 741209bda47SHans de Goede dev_err(&ts->client->dev, "Controller irq sync failed.\n"); 742209bda47SHans de Goede return error; 743209bda47SHans de Goede } 744209bda47SHans de Goede 745209bda47SHans de Goede /** 746209bda47SHans de Goede * goodix_reset_no_int_sync - Reset device, leaving interrupt line in output mode 747209bda47SHans de Goede * 748209bda47SHans de Goede * @ts: goodix_ts_data pointer 749209bda47SHans de Goede */ 750209bda47SHans de Goede int goodix_reset_no_int_sync(struct goodix_ts_data *ts) 751209bda47SHans de Goede { 752209bda47SHans de Goede int error; 753209bda47SHans de Goede 754209bda47SHans de Goede /* begin select I2C slave addr */ 755209bda47SHans de Goede error = gpiod_direction_output(ts->gpiod_rst, 0); 756209bda47SHans de Goede if (error) 757209bda47SHans de Goede goto error; 758209bda47SHans de Goede 759209bda47SHans de Goede msleep(20); /* T2: > 10ms */ 760209bda47SHans de Goede 761209bda47SHans de Goede /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */ 762209bda47SHans de Goede error = goodix_irq_direction_output(ts, ts->client->addr == 0x14); 763209bda47SHans de Goede if (error) 764209bda47SHans de Goede goto error; 765209bda47SHans de Goede 766209bda47SHans de Goede usleep_range(100, 2000); /* T3: > 100us */ 767209bda47SHans de Goede 768209bda47SHans de Goede error = gpiod_direction_output(ts->gpiod_rst, 1); 769209bda47SHans de Goede if (error) 770209bda47SHans de Goede goto error; 771209bda47SHans de Goede 772209bda47SHans de Goede usleep_range(6000, 10000); /* T4: > 5ms */ 773209bda47SHans de Goede 774a2fd46cdSHans de Goede /* 775a2fd46cdSHans de Goede * Put the reset pin back in to input / high-impedance mode to save 776a2fd46cdSHans de Goede * power. Only do this in the non ACPI case since some ACPI boards 777a2fd46cdSHans de Goede * don't have a pull-up, so there the reset pin must stay active-high. 778a2fd46cdSHans de Goede */ 779a2fd46cdSHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_GPIO) { 780209bda47SHans de Goede error = gpiod_direction_input(ts->gpiod_rst); 781209bda47SHans de Goede if (error) 782209bda47SHans de Goede goto error; 783a2fd46cdSHans de Goede } 784209bda47SHans de Goede 785209bda47SHans de Goede return 0; 786209bda47SHans de Goede 787209bda47SHans de Goede error: 788209bda47SHans de Goede dev_err(&ts->client->dev, "Controller reset failed.\n"); 789209bda47SHans de Goede return error; 790ec6e1b40SIrina Tirdea } 791ec6e1b40SIrina Tirdea 792ec6e1b40SIrina Tirdea /** 793ec6e1b40SIrina Tirdea * goodix_reset - Reset device during power on 794ec6e1b40SIrina Tirdea * 795ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 796ec6e1b40SIrina Tirdea */ 797ec6e1b40SIrina Tirdea static int goodix_reset(struct goodix_ts_data *ts) 798ec6e1b40SIrina Tirdea { 799ec6e1b40SIrina Tirdea int error; 800ec6e1b40SIrina Tirdea 801209bda47SHans de Goede error = goodix_reset_no_int_sync(ts); 802ec6e1b40SIrina Tirdea if (error) 803ec6e1b40SIrina Tirdea return error; 804ec6e1b40SIrina Tirdea 805209bda47SHans de Goede return goodix_int_sync(ts); 806ec6e1b40SIrina Tirdea } 807ec6e1b40SIrina Tirdea 808c9c20ee3SHans de Goede #ifdef ACPI_GPIO_SUPPORT 809a7d4b171SHans de Goede static const struct acpi_gpio_params first_gpio = { 0, 0, false }; 810a7d4b171SHans de Goede static const struct acpi_gpio_params second_gpio = { 1, 0, false }; 811a7d4b171SHans de Goede 812a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_first_gpios[] = { 813a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &first_gpio, 1 }, 814a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &second_gpio, 1 }, 815a7d4b171SHans de Goede { }, 816a7d4b171SHans de Goede }; 817a7d4b171SHans de Goede 818a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_last_gpios[] = { 819a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 820a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &second_gpio, 1 }, 821a7d4b171SHans de Goede { }, 822a7d4b171SHans de Goede }; 823a7d4b171SHans de Goede 824c5fca485SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_reset_only_gpios[] = { 825c5fca485SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 826c5fca485SHans de Goede { }, 827c5fca485SHans de Goede }; 828c5fca485SHans de Goede 829a7d4b171SHans de Goede static int goodix_resource(struct acpi_resource *ares, void *data) 830a7d4b171SHans de Goede { 831a7d4b171SHans de Goede struct goodix_ts_data *ts = data; 832a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 833a7d4b171SHans de Goede struct acpi_resource_gpio *gpio; 834a7d4b171SHans de Goede 835a7d4b171SHans de Goede switch (ares->type) { 836a7d4b171SHans de Goede case ACPI_RESOURCE_TYPE_GPIO: 837a7d4b171SHans de Goede gpio = &ares->data.gpio; 838a7d4b171SHans de Goede if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { 839a7d4b171SHans de Goede if (ts->gpio_int_idx == -1) { 840a7d4b171SHans de Goede ts->gpio_int_idx = ts->gpio_count; 841a7d4b171SHans de Goede } else { 842a7d4b171SHans de Goede dev_err(dev, "More then one GpioInt resource, ignoring ACPI GPIO resources\n"); 843a7d4b171SHans de Goede ts->gpio_int_idx = -2; 844a7d4b171SHans de Goede } 845a7d4b171SHans de Goede } 846a7d4b171SHans de Goede ts->gpio_count++; 847a7d4b171SHans de Goede break; 848a7d4b171SHans de Goede default: 849a7d4b171SHans de Goede break; 850a7d4b171SHans de Goede } 851a7d4b171SHans de Goede 852a7d4b171SHans de Goede return 0; 853a7d4b171SHans de Goede } 854a7d4b171SHans de Goede 855a7d4b171SHans de Goede /* 856a7d4b171SHans de Goede * This function gets called in case we fail to get the irq GPIO directly 857a7d4b171SHans de Goede * because the ACPI tables lack GPIO-name to APCI _CRS index mappings 858a7d4b171SHans de Goede * (no _DSD UUID daffd814-6eba-4d8c-8a91-bc9bbf4aa301 data). 859a7d4b171SHans de Goede * In that case we add our own mapping and then goodix_get_gpio_config() 860a7d4b171SHans de Goede * retries to get the GPIOs based on the added mapping. 861a7d4b171SHans de Goede */ 862a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 863a7d4b171SHans de Goede { 864a7d4b171SHans de Goede const struct acpi_gpio_mapping *gpio_mapping = NULL; 865a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 866a7d4b171SHans de Goede LIST_HEAD(resources); 867a7d4b171SHans de Goede int ret; 868a7d4b171SHans de Goede 869a7d4b171SHans de Goede ts->gpio_count = 0; 870a7d4b171SHans de Goede ts->gpio_int_idx = -1; 871a7d4b171SHans de Goede ret = acpi_dev_get_resources(ACPI_COMPANION(dev), &resources, 872a7d4b171SHans de Goede goodix_resource, ts); 873a7d4b171SHans de Goede if (ret < 0) { 874a7d4b171SHans de Goede dev_err(dev, "Error getting ACPI resources: %d\n", ret); 875a7d4b171SHans de Goede return ret; 876a7d4b171SHans de Goede } 877a7d4b171SHans de Goede 878a7d4b171SHans de Goede acpi_dev_free_resource_list(&resources); 879a7d4b171SHans de Goede 880a7d4b171SHans de Goede if (ts->gpio_count == 2 && ts->gpio_int_idx == 0) { 881a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 882a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_first_gpios; 883a7d4b171SHans de Goede } else if (ts->gpio_count == 2 && ts->gpio_int_idx == 1) { 884a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 885a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_last_gpios; 886c5fca485SHans de Goede } else if (ts->gpio_count == 1 && ts->gpio_int_idx == -1 && 887c5fca485SHans de Goede acpi_has_method(ACPI_HANDLE(dev), "INTI") && 888c5fca485SHans de Goede acpi_has_method(ACPI_HANDLE(dev), "INTO")) { 889c5fca485SHans de Goede dev_info(dev, "Using ACPI INTI and INTO methods for IRQ pin access\n"); 890c5fca485SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_METHOD; 891c5fca485SHans de Goede gpio_mapping = acpi_goodix_reset_only_gpios; 892*d176708fSHans de Goede } else if (soc_intel_is_byt() && ts->gpio_count == 2 && ts->gpio_int_idx == -1) { 89367abd9eeSHans de Goede dev_info(dev, "No ACPI GpioInt resource, assuming that the GPIO order is reset, int\n"); 89467abd9eeSHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 89567abd9eeSHans de Goede gpio_mapping = acpi_goodix_int_last_gpios; 896a7d4b171SHans de Goede } else { 897a7d4b171SHans de Goede dev_warn(dev, "Unexpected ACPI resources: gpio_count %d, gpio_int_idx %d\n", 898a7d4b171SHans de Goede ts->gpio_count, ts->gpio_int_idx); 899a7d4b171SHans de Goede return -EINVAL; 900a7d4b171SHans de Goede } 901a7d4b171SHans de Goede 902a2fd46cdSHans de Goede /* 903a2fd46cdSHans de Goede * Normally we put the reset pin in input / high-impedance mode to save 904a2fd46cdSHans de Goede * power. But some x86/ACPI boards don't have a pull-up, so for the ACPI 905a2fd46cdSHans de Goede * case, leave the pin as is. This results in the pin not being touched 906a2fd46cdSHans de Goede * at all on x86/ACPI boards, except when needed for error-recover. 907a2fd46cdSHans de Goede */ 908a2fd46cdSHans de Goede ts->gpiod_rst_flags = GPIOD_ASIS; 909a2fd46cdSHans de Goede 910a7d4b171SHans de Goede return devm_acpi_dev_add_driver_gpios(dev, gpio_mapping); 911a7d4b171SHans de Goede } 912a7d4b171SHans de Goede #else 913a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 914a7d4b171SHans de Goede { 915a7d4b171SHans de Goede return -EINVAL; 916a7d4b171SHans de Goede } 917a7d4b171SHans de Goede #endif /* CONFIG_X86 && CONFIG_ACPI */ 918a7d4b171SHans de Goede 919ec6e1b40SIrina Tirdea /** 920ec6e1b40SIrina Tirdea * goodix_get_gpio_config - Get GPIO config from ACPI/DT 921ec6e1b40SIrina Tirdea * 922ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 923ec6e1b40SIrina Tirdea */ 924ec6e1b40SIrina Tirdea static int goodix_get_gpio_config(struct goodix_ts_data *ts) 925ec6e1b40SIrina Tirdea { 926ec6e1b40SIrina Tirdea int error; 927ec6e1b40SIrina Tirdea struct device *dev; 928ec6e1b40SIrina Tirdea struct gpio_desc *gpiod; 929a7d4b171SHans de Goede bool added_acpi_mappings = false; 930ec6e1b40SIrina Tirdea 931ec6e1b40SIrina Tirdea if (!ts->client) 932ec6e1b40SIrina Tirdea return -EINVAL; 933ec6e1b40SIrina Tirdea dev = &ts->client->dev; 934ec6e1b40SIrina Tirdea 935a2fd46cdSHans de Goede /* 936a2fd46cdSHans de Goede * By default we request the reset pin as input, leaving it in 937a2fd46cdSHans de Goede * high-impedance when not resetting the controller to save power. 938a2fd46cdSHans de Goede */ 939a2fd46cdSHans de Goede ts->gpiod_rst_flags = GPIOD_IN; 940a2fd46cdSHans de Goede 941ae97fb58SJagan Teki ts->avdd28 = devm_regulator_get(dev, "AVDD28"); 942ae97fb58SJagan Teki if (IS_ERR(ts->avdd28)) { 943ae97fb58SJagan Teki error = PTR_ERR(ts->avdd28); 944ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 945ae97fb58SJagan Teki dev_err(dev, 946ae97fb58SJagan Teki "Failed to get AVDD28 regulator: %d\n", error); 947ae97fb58SJagan Teki return error; 948ae97fb58SJagan Teki } 949ae97fb58SJagan Teki 950ae97fb58SJagan Teki ts->vddio = devm_regulator_get(dev, "VDDIO"); 951ae97fb58SJagan Teki if (IS_ERR(ts->vddio)) { 952ae97fb58SJagan Teki error = PTR_ERR(ts->vddio); 953ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 954ae97fb58SJagan Teki dev_err(dev, 955ae97fb58SJagan Teki "Failed to get VDDIO regulator: %d\n", error); 956ae97fb58SJagan Teki return error; 957ae97fb58SJagan Teki } 958ae97fb58SJagan Teki 959a7d4b171SHans de Goede retry_get_irq_gpio: 960ec6e1b40SIrina Tirdea /* Get the interrupt GPIO pin number */ 961ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN); 962ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 963ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 964ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 96584345c61SHans de Goede dev_err(dev, "Failed to get %s GPIO: %d\n", 966ec6e1b40SIrina Tirdea GOODIX_GPIO_INT_NAME, error); 967ec6e1b40SIrina Tirdea return error; 968ec6e1b40SIrina Tirdea } 969a7d4b171SHans de Goede if (!gpiod && has_acpi_companion(dev) && !added_acpi_mappings) { 970a7d4b171SHans de Goede added_acpi_mappings = true; 971a7d4b171SHans de Goede if (goodix_add_acpi_gpio_mappings(ts) == 0) 972a7d4b171SHans de Goede goto retry_get_irq_gpio; 973a7d4b171SHans de Goede } 974ec6e1b40SIrina Tirdea 975ec6e1b40SIrina Tirdea ts->gpiod_int = gpiod; 976ec6e1b40SIrina Tirdea 977ec6e1b40SIrina Tirdea /* Get the reset line GPIO pin number */ 978a2fd46cdSHans de Goede gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, ts->gpiod_rst_flags); 979ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 980ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 981ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 98284345c61SHans de Goede dev_err(dev, "Failed to get %s GPIO: %d\n", 983ec6e1b40SIrina Tirdea GOODIX_GPIO_RST_NAME, error); 984ec6e1b40SIrina Tirdea return error; 985ec6e1b40SIrina Tirdea } 986ec6e1b40SIrina Tirdea 987ec6e1b40SIrina Tirdea ts->gpiod_rst = gpiod; 988ec6e1b40SIrina Tirdea 989a7d4b171SHans de Goede switch (ts->irq_pin_access_method) { 990a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 991a7d4b171SHans de Goede /* 992a7d4b171SHans de Goede * We end up here if goodix_add_acpi_gpio_mappings() has 993a7d4b171SHans de Goede * called devm_acpi_dev_add_driver_gpios() because the ACPI 994a7d4b171SHans de Goede * tables did not contain name to index mappings. 995a7d4b171SHans de Goede * Check that we successfully got both GPIOs after we've 996a7d4b171SHans de Goede * added our own acpi_gpio_mapping and if we did not get both 997a7d4b171SHans de Goede * GPIOs reset irq_pin_access_method to IRQ_PIN_ACCESS_NONE. 998a7d4b171SHans de Goede */ 999a7d4b171SHans de Goede if (!ts->gpiod_int || !ts->gpiod_rst) 1000a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 1001a7d4b171SHans de Goede break; 1002c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 1003c5fca485SHans de Goede if (!ts->gpiod_rst) 1004c5fca485SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 1005c5fca485SHans de Goede break; 1006a7d4b171SHans de Goede default: 1007e070a97bSHans de Goede if (ts->gpiod_int && ts->gpiod_rst) { 10081921daceSHans de Goede ts->reset_controller_at_probe = true; 1009e070a97bSHans de Goede ts->load_cfg_from_disk = true; 101049db3997SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_GPIO; 1011e070a97bSHans de Goede } 1012a7d4b171SHans de Goede } 101349db3997SHans de Goede 1014ec6e1b40SIrina Tirdea return 0; 1015ec6e1b40SIrina Tirdea } 1016ec6e1b40SIrina Tirdea 1017ca96ea86SBastien Nocera /** 1018ca96ea86SBastien Nocera * goodix_read_config - Read the embedded configuration of the panel 1019ca96ea86SBastien Nocera * 1020ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 1021ca96ea86SBastien Nocera * 1022ca96ea86SBastien Nocera * Must be called during probe 1023ca96ea86SBastien Nocera */ 1024ca96ea86SBastien Nocera static void goodix_read_config(struct goodix_ts_data *ts) 1025ca96ea86SBastien Nocera { 1026fafef982SMarcin Niestroj int x_max, y_max; 1027ca96ea86SBastien Nocera int error; 1028ca96ea86SBastien Nocera 102909182ed2SHans de Goede /* 103009182ed2SHans de Goede * On controllers where we need to upload the firmware 103109182ed2SHans de Goede * (controllers without flash) ts->config already has the config 103209182ed2SHans de Goede * at this point and the controller itself does not have it yet! 103309182ed2SHans de Goede */ 103409182ed2SHans de Goede if (!ts->firmware_name) { 103525309004SMarcin Niestroj error = goodix_i2c_read(ts->client, ts->chip->config_addr, 1036de956caeSHans de Goede ts->config, ts->chip->config_len); 1037ca96ea86SBastien Nocera if (error) { 1038ca96ea86SBastien Nocera ts->int_trigger_type = GOODIX_INT_TRIGGER; 1039a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 1040ca96ea86SBastien Nocera return; 1041ca96ea86SBastien Nocera } 104209182ed2SHans de Goede } 1043ca96ea86SBastien Nocera 1044de956caeSHans de Goede ts->int_trigger_type = ts->config[TRIGGER_LOC] & 0x03; 1045de956caeSHans de Goede ts->max_touch_num = ts->config[MAX_CONTACTS_LOC] & 0x0f; 10468b5a359cSBastien Nocera 1047de956caeSHans de Goede x_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC]); 1048de956caeSHans de Goede y_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC + 2]); 1049fafef982SMarcin Niestroj if (x_max && y_max) { 1050fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_X, x_max - 1); 1051fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_Y, y_max - 1); 1052ca96ea86SBastien Nocera } 1053de956caeSHans de Goede 1054de956caeSHans de Goede ts->chip->calc_config_checksum(ts); 105557c80e8eSKarsten Merker } 1056ca96ea86SBastien Nocera 1057ca96ea86SBastien Nocera /** 1058ca96ea86SBastien Nocera * goodix_read_version - Read goodix touchscreen version 1059ca96ea86SBastien Nocera * 106068caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 1061ca96ea86SBastien Nocera */ 106268caf858SIrina Tirdea static int goodix_read_version(struct goodix_ts_data *ts) 1063ca96ea86SBastien Nocera { 1064ca96ea86SBastien Nocera int error; 1065ca96ea86SBastien Nocera u8 buf[6]; 1066cae102e2SIcenowy Zheng char id_str[GOODIX_ID_MAX_LEN + 1]; 1067ca96ea86SBastien Nocera 106868caf858SIrina Tirdea error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf)); 10697642f29cSHans de Goede if (error) 1070ca96ea86SBastien Nocera return error; 1071ca96ea86SBastien Nocera 1072cae102e2SIcenowy Zheng memcpy(id_str, buf, GOODIX_ID_MAX_LEN); 1073cae102e2SIcenowy Zheng id_str[GOODIX_ID_MAX_LEN] = 0; 1074cae102e2SIcenowy Zheng strscpy(ts->id, id_str, GOODIX_ID_MAX_LEN + 1); 1075e70b0307SIrina Tirdea 107668caf858SIrina Tirdea ts->version = get_unaligned_le16(&buf[4]); 1077ca96ea86SBastien Nocera 1078cae102e2SIcenowy Zheng dev_info(&ts->client->dev, "ID %s, version: %04x\n", ts->id, 107968caf858SIrina Tirdea ts->version); 1080ca96ea86SBastien Nocera 1081ca96ea86SBastien Nocera return 0; 1082ca96ea86SBastien Nocera } 1083ca96ea86SBastien Nocera 1084ca96ea86SBastien Nocera /** 1085ca96ea86SBastien Nocera * goodix_i2c_test - I2C test function to check if the device answers. 1086ca96ea86SBastien Nocera * 1087ca96ea86SBastien Nocera * @client: the i2c client 1088ca96ea86SBastien Nocera */ 1089ca96ea86SBastien Nocera static int goodix_i2c_test(struct i2c_client *client) 1090ca96ea86SBastien Nocera { 1091ca96ea86SBastien Nocera int retry = 0; 1092ca96ea86SBastien Nocera int error; 1093ca96ea86SBastien Nocera u8 test; 1094ca96ea86SBastien Nocera 1095ca96ea86SBastien Nocera while (retry++ < 2) { 10967642f29cSHans de Goede error = goodix_i2c_read(client, GOODIX_REG_ID, &test, 1); 1097ca96ea86SBastien Nocera if (!error) 1098ca96ea86SBastien Nocera return 0; 1099ca96ea86SBastien Nocera 1100ca96ea86SBastien Nocera msleep(20); 1101ca96ea86SBastien Nocera } 1102ca96ea86SBastien Nocera 1103ca96ea86SBastien Nocera return error; 1104ca96ea86SBastien Nocera } 1105ca96ea86SBastien Nocera 1106ca96ea86SBastien Nocera /** 110768caf858SIrina Tirdea * goodix_configure_dev - Finish device initialization 110868caf858SIrina Tirdea * 110968caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 111068caf858SIrina Tirdea * 111168caf858SIrina Tirdea * Must be called from probe to finish initialization of the device. 111268caf858SIrina Tirdea * Contains the common initialization code for both devices that 111368caf858SIrina Tirdea * declare gpio pins and devices that do not. It is either called 111468caf858SIrina Tirdea * directly from probe or from request_firmware_wait callback. 111568caf858SIrina Tirdea */ 111668caf858SIrina Tirdea static int goodix_configure_dev(struct goodix_ts_data *ts) 111768caf858SIrina Tirdea { 111868caf858SIrina Tirdea int error; 1119492ee52cSDmitry Mastykin int i; 112068caf858SIrina Tirdea 1121fafef982SMarcin Niestroj ts->int_trigger_type = GOODIX_INT_TRIGGER; 1122fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 1123ad48cf5eSKarsten Merker 1124fafef982SMarcin Niestroj ts->input_dev = devm_input_allocate_device(&ts->client->dev); 1125fafef982SMarcin Niestroj if (!ts->input_dev) { 1126fafef982SMarcin Niestroj dev_err(&ts->client->dev, "Failed to allocate input device."); 1127fafef982SMarcin Niestroj return -ENOMEM; 1128fafef982SMarcin Niestroj } 1129fafef982SMarcin Niestroj 1130fafef982SMarcin Niestroj ts->input_dev->name = "Goodix Capacitive TouchScreen"; 1131fafef982SMarcin Niestroj ts->input_dev->phys = "input/ts"; 1132fafef982SMarcin Niestroj ts->input_dev->id.bustype = BUS_I2C; 1133fafef982SMarcin Niestroj ts->input_dev->id.vendor = 0x0416; 1134cae102e2SIcenowy Zheng if (kstrtou16(ts->id, 10, &ts->input_dev->id.product)) 1135cae102e2SIcenowy Zheng ts->input_dev->id.product = 0x1001; 1136fafef982SMarcin Niestroj ts->input_dev->id.version = ts->version; 1137fafef982SMarcin Niestroj 1138492ee52cSDmitry Mastykin ts->input_dev->keycode = ts->keymap; 1139492ee52cSDmitry Mastykin ts->input_dev->keycodesize = sizeof(ts->keymap[0]); 1140492ee52cSDmitry Mastykin ts->input_dev->keycodemax = GOODIX_MAX_KEYS; 1141492ee52cSDmitry Mastykin 1142fafef982SMarcin Niestroj /* Capacitive Windows/Home button on some devices */ 1143492ee52cSDmitry Mastykin for (i = 0; i < GOODIX_MAX_KEYS; ++i) { 1144492ee52cSDmitry Mastykin if (i == 0) 1145492ee52cSDmitry Mastykin ts->keymap[i] = KEY_LEFTMETA; 1146492ee52cSDmitry Mastykin else 1147492ee52cSDmitry Mastykin ts->keymap[i] = KEY_F1 + (i - 1); 1148492ee52cSDmitry Mastykin 1149492ee52cSDmitry Mastykin input_set_capability(ts->input_dev, EV_KEY, ts->keymap[i]); 1150492ee52cSDmitry Mastykin } 1151fafef982SMarcin Niestroj 1152fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X); 1153fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y); 1154fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 1155fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 1156fafef982SMarcin Niestroj 1157fafef982SMarcin Niestroj /* Read configuration and apply touchscreen parameters */ 115868caf858SIrina Tirdea goodix_read_config(ts); 115968caf858SIrina Tirdea 1160fafef982SMarcin Niestroj /* Try overriding touchscreen parameters via device properties */ 1161fafef982SMarcin Niestroj touchscreen_parse_properties(ts->input_dev, true, &ts->prop); 1162fafef982SMarcin Niestroj 1163fafef982SMarcin Niestroj if (!ts->prop.max_x || !ts->prop.max_y || !ts->max_touch_num) { 1164c1c00aa5SGuido Günther dev_err(&ts->client->dev, 1165c1c00aa5SGuido Günther "Invalid config (%d, %d, %d), using defaults\n", 1166c1c00aa5SGuido Günther ts->prop.max_x, ts->prop.max_y, ts->max_touch_num); 1167fafef982SMarcin Niestroj ts->prop.max_x = GOODIX_MAX_WIDTH - 1; 1168fafef982SMarcin Niestroj ts->prop.max_y = GOODIX_MAX_HEIGHT - 1; 1169fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 1170fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 1171fafef982SMarcin Niestroj ABS_MT_POSITION_X, ts->prop.max_x); 1172fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 1173fafef982SMarcin Niestroj ABS_MT_POSITION_Y, ts->prop.max_y); 1174fafef982SMarcin Niestroj } 1175fafef982SMarcin Niestroj 1176bd3b8480SYauhen Kharuzhy if (dmi_check_system(nine_bytes_report)) { 1177bd3b8480SYauhen Kharuzhy ts->contact_size = 9; 1178bd3b8480SYauhen Kharuzhy 1179bd3b8480SYauhen Kharuzhy dev_dbg(&ts->client->dev, 1180bd3b8480SYauhen Kharuzhy "Non-standard 9-bytes report format quirk\n"); 1181bd3b8480SYauhen Kharuzhy } 1182bd3b8480SYauhen Kharuzhy 11831dd5ddc1SSergei A. Trusov if (dmi_check_system(inverted_x_screen)) { 11841dd5ddc1SSergei A. Trusov ts->prop.invert_x = true; 11851dd5ddc1SSergei A. Trusov dev_dbg(&ts->client->dev, 11861dd5ddc1SSergei A. Trusov "Applying 'inverted x screen' quirk\n"); 11871dd5ddc1SSergei A. Trusov } 11881dd5ddc1SSergei A. Trusov 1189fafef982SMarcin Niestroj error = input_mt_init_slots(ts->input_dev, ts->max_touch_num, 1190fafef982SMarcin Niestroj INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); 1191fafef982SMarcin Niestroj if (error) { 1192fafef982SMarcin Niestroj dev_err(&ts->client->dev, 1193fafef982SMarcin Niestroj "Failed to initialize MT slots: %d", error); 119468caf858SIrina Tirdea return error; 1195fafef982SMarcin Niestroj } 1196fafef982SMarcin Niestroj 1197fafef982SMarcin Niestroj error = input_register_device(ts->input_dev); 1198fafef982SMarcin Niestroj if (error) { 1199fafef982SMarcin Niestroj dev_err(&ts->client->dev, 1200fafef982SMarcin Niestroj "Failed to register input device: %d", error); 1201fafef982SMarcin Niestroj return error; 1202fafef982SMarcin Niestroj } 120368caf858SIrina Tirdea 12045ab09d6aSIrina Tirdea ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT; 12055ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 120668caf858SIrina Tirdea if (error) { 120768caf858SIrina Tirdea dev_err(&ts->client->dev, "request IRQ failed: %d\n", error); 120868caf858SIrina Tirdea return error; 120968caf858SIrina Tirdea } 121068caf858SIrina Tirdea 121168caf858SIrina Tirdea return 0; 121268caf858SIrina Tirdea } 121368caf858SIrina Tirdea 121468caf858SIrina Tirdea /** 121568caf858SIrina Tirdea * goodix_config_cb - Callback to finish device init 121668caf858SIrina Tirdea * 1217cb690465SLee Jones * @cfg: firmware config 1218584da78cSLee Jones * @ctx: our goodix_ts_data pointer 121968caf858SIrina Tirdea * 122068caf858SIrina Tirdea * request_firmware_wait callback that finishes 122168caf858SIrina Tirdea * initialization of the device. 122268caf858SIrina Tirdea */ 122368caf858SIrina Tirdea static void goodix_config_cb(const struct firmware *cfg, void *ctx) 122468caf858SIrina Tirdea { 122568caf858SIrina Tirdea struct goodix_ts_data *ts = ctx; 122668caf858SIrina Tirdea int error; 122768caf858SIrina Tirdea 122809182ed2SHans de Goede if (ts->firmware_name) { 122909182ed2SHans de Goede if (!cfg) 123009182ed2SHans de Goede goto err_release_cfg; 123109182ed2SHans de Goede 123209182ed2SHans de Goede error = goodix_check_cfg(ts, cfg->data, cfg->size); 123309182ed2SHans de Goede if (error) 123409182ed2SHans de Goede goto err_release_cfg; 123509182ed2SHans de Goede 123609182ed2SHans de Goede memcpy(ts->config, cfg->data, cfg->size); 123709182ed2SHans de Goede } else if (cfg) { 123868caf858SIrina Tirdea /* send device configuration to the firmware */ 12391a67448fSHans de Goede error = goodix_send_cfg(ts, cfg->data, cfg->size); 124068caf858SIrina Tirdea if (error) 124168caf858SIrina Tirdea goto err_release_cfg; 124268caf858SIrina Tirdea } 124368caf858SIrina Tirdea 124468caf858SIrina Tirdea goodix_configure_dev(ts); 124568caf858SIrina Tirdea 124668caf858SIrina Tirdea err_release_cfg: 124768caf858SIrina Tirdea release_firmware(cfg); 124868caf858SIrina Tirdea complete_all(&ts->firmware_loading_complete); 124968caf858SIrina Tirdea } 125068caf858SIrina Tirdea 1251ae97fb58SJagan Teki static void goodix_disable_regulators(void *arg) 1252ae97fb58SJagan Teki { 1253ae97fb58SJagan Teki struct goodix_ts_data *ts = arg; 1254ae97fb58SJagan Teki 1255ae97fb58SJagan Teki regulator_disable(ts->vddio); 1256ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1257ae97fb58SJagan Teki } 1258ae97fb58SJagan Teki 1259ca96ea86SBastien Nocera static int goodix_ts_probe(struct i2c_client *client, 1260ca96ea86SBastien Nocera const struct i2c_device_id *id) 1261ca96ea86SBastien Nocera { 1262ca96ea86SBastien Nocera struct goodix_ts_data *ts; 126320e31722SHans de Goede const char *cfg_name; 1264ca96ea86SBastien Nocera int error; 1265ca96ea86SBastien Nocera 1266ca96ea86SBastien Nocera dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr); 1267ca96ea86SBastien Nocera 1268ca96ea86SBastien Nocera if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 1269ca96ea86SBastien Nocera dev_err(&client->dev, "I2C check functionality failed.\n"); 1270ca96ea86SBastien Nocera return -ENXIO; 1271ca96ea86SBastien Nocera } 1272ca96ea86SBastien Nocera 1273ca96ea86SBastien Nocera ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); 1274ca96ea86SBastien Nocera if (!ts) 1275ca96ea86SBastien Nocera return -ENOMEM; 1276ca96ea86SBastien Nocera 1277ca96ea86SBastien Nocera ts->client = client; 1278ca96ea86SBastien Nocera i2c_set_clientdata(client, ts); 127968caf858SIrina Tirdea init_completion(&ts->firmware_loading_complete); 1280bd3b8480SYauhen Kharuzhy ts->contact_size = GOODIX_CONTACT_SIZE; 1281ca96ea86SBastien Nocera 1282ec6e1b40SIrina Tirdea error = goodix_get_gpio_config(ts); 1283ec6e1b40SIrina Tirdea if (error) 1284ec6e1b40SIrina Tirdea return error; 1285ec6e1b40SIrina Tirdea 1286ae97fb58SJagan Teki /* power up the controller */ 1287ae97fb58SJagan Teki error = regulator_enable(ts->avdd28); 1288ae97fb58SJagan Teki if (error) { 1289ae97fb58SJagan Teki dev_err(&client->dev, 1290ae97fb58SJagan Teki "Failed to enable AVDD28 regulator: %d\n", 1291ae97fb58SJagan Teki error); 1292ae97fb58SJagan Teki return error; 1293ae97fb58SJagan Teki } 1294ae97fb58SJagan Teki 1295ae97fb58SJagan Teki error = regulator_enable(ts->vddio); 1296ae97fb58SJagan Teki if (error) { 1297ae97fb58SJagan Teki dev_err(&client->dev, 1298ae97fb58SJagan Teki "Failed to enable VDDIO regulator: %d\n", 1299ae97fb58SJagan Teki error); 1300ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1301ae97fb58SJagan Teki return error; 1302ae97fb58SJagan Teki } 1303ae97fb58SJagan Teki 1304ae97fb58SJagan Teki error = devm_add_action_or_reset(&client->dev, 1305ae97fb58SJagan Teki goodix_disable_regulators, ts); 1306ae97fb58SJagan Teki if (error) 1307ae97fb58SJagan Teki return error; 1308ae97fb58SJagan Teki 13099e1f2d70SHans de Goede reset: 13101921daceSHans de Goede if (ts->reset_controller_at_probe) { 1311ec6e1b40SIrina Tirdea /* reset the controller */ 1312ec6e1b40SIrina Tirdea error = goodix_reset(ts); 1313209bda47SHans de Goede if (error) 1314ec6e1b40SIrina Tirdea return error; 1315ec6e1b40SIrina Tirdea } 1316ec6e1b40SIrina Tirdea 1317ca96ea86SBastien Nocera error = goodix_i2c_test(client); 1318ca96ea86SBastien Nocera if (error) { 13199e1f2d70SHans de Goede if (!ts->reset_controller_at_probe && 13209e1f2d70SHans de Goede ts->irq_pin_access_method != IRQ_PIN_ACCESS_NONE) { 13219e1f2d70SHans de Goede /* Retry after a controller reset */ 13229e1f2d70SHans de Goede ts->reset_controller_at_probe = true; 13239e1f2d70SHans de Goede goto reset; 13249e1f2d70SHans de Goede } 1325ca96ea86SBastien Nocera dev_err(&client->dev, "I2C communication failure: %d\n", error); 1326ca96ea86SBastien Nocera return error; 1327ca96ea86SBastien Nocera } 1328ca96ea86SBastien Nocera 132909182ed2SHans de Goede error = goodix_firmware_check(ts); 133009182ed2SHans de Goede if (error) 133109182ed2SHans de Goede return error; 133209182ed2SHans de Goede 133368caf858SIrina Tirdea error = goodix_read_version(ts); 13347642f29cSHans de Goede if (error) 1335ca96ea86SBastien Nocera return error; 1336ca96ea86SBastien Nocera 133725309004SMarcin Niestroj ts->chip = goodix_get_chip_data(ts->id); 1338a779fbc6SIrina Tirdea 1339e070a97bSHans de Goede if (ts->load_cfg_from_disk) { 134068caf858SIrina Tirdea /* update device config */ 134120e31722SHans de Goede error = device_property_read_string(&client->dev, 134220e31722SHans de Goede "goodix,config-name", 134320e31722SHans de Goede &cfg_name); 134420e31722SHans de Goede if (!error) 134520e31722SHans de Goede snprintf(ts->cfg_name, sizeof(ts->cfg_name), 134620e31722SHans de Goede "goodix/%s", cfg_name); 134720e31722SHans de Goede else 134820e31722SHans de Goede snprintf(ts->cfg_name, sizeof(ts->cfg_name), 1349cae102e2SIcenowy Zheng "goodix_%s_cfg.bin", ts->id); 1350ca96ea86SBastien Nocera 135168caf858SIrina Tirdea error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name, 135268caf858SIrina Tirdea &client->dev, GFP_KERNEL, ts, 135368caf858SIrina Tirdea goodix_config_cb); 1354ca96ea86SBastien Nocera if (error) { 135568caf858SIrina Tirdea dev_err(&client->dev, 135668caf858SIrina Tirdea "Failed to invoke firmware loader: %d\n", 135768caf858SIrina Tirdea error); 1358ca96ea86SBastien Nocera return error; 1359ca96ea86SBastien Nocera } 1360ca96ea86SBastien Nocera 1361ca96ea86SBastien Nocera return 0; 136268caf858SIrina Tirdea } else { 136368caf858SIrina Tirdea error = goodix_configure_dev(ts); 136468caf858SIrina Tirdea if (error) 136568caf858SIrina Tirdea return error; 136668caf858SIrina Tirdea } 136768caf858SIrina Tirdea 136868caf858SIrina Tirdea return 0; 136968caf858SIrina Tirdea } 137068caf858SIrina Tirdea 137168caf858SIrina Tirdea static int goodix_ts_remove(struct i2c_client *client) 137268caf858SIrina Tirdea { 137368caf858SIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 137468caf858SIrina Tirdea 1375e070a97bSHans de Goede if (ts->load_cfg_from_disk) 137668caf858SIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 137768caf858SIrina Tirdea 137868caf858SIrina Tirdea return 0; 1379ca96ea86SBastien Nocera } 1380ca96ea86SBastien Nocera 13815ab09d6aSIrina Tirdea static int __maybe_unused goodix_suspend(struct device *dev) 13825ab09d6aSIrina Tirdea { 13835ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 13845ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 13855ab09d6aSIrina Tirdea int error; 13865ab09d6aSIrina Tirdea 1387e070a97bSHans de Goede if (ts->load_cfg_from_disk) 1388e070a97bSHans de Goede wait_for_completion(&ts->firmware_loading_complete); 1389e070a97bSHans de Goede 13905ab09d6aSIrina Tirdea /* We need gpio pins to suspend/resume */ 139149db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1392faec44b6SHans de Goede disable_irq(client->irq); 13935ab09d6aSIrina Tirdea return 0; 1394faec44b6SHans de Goede } 13955ab09d6aSIrina Tirdea 13965ab09d6aSIrina Tirdea /* Free IRQ as IRQ pin is used as output in the suspend sequence */ 13975ab09d6aSIrina Tirdea goodix_free_irq(ts); 13985ab09d6aSIrina Tirdea 139909182ed2SHans de Goede /* Save reference (calibration) info if necessary */ 140009182ed2SHans de Goede goodix_save_bak_ref(ts); 140109182ed2SHans de Goede 14025ab09d6aSIrina Tirdea /* Output LOW on the INT pin for 5 ms */ 140349db3997SHans de Goede error = goodix_irq_direction_output(ts, 0); 14045ab09d6aSIrina Tirdea if (error) { 14055ab09d6aSIrina Tirdea goodix_request_irq(ts); 14065ab09d6aSIrina Tirdea return error; 14075ab09d6aSIrina Tirdea } 14085ab09d6aSIrina Tirdea 14095ab09d6aSIrina Tirdea usleep_range(5000, 6000); 14105ab09d6aSIrina Tirdea 14115ab09d6aSIrina Tirdea error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND, 14125ab09d6aSIrina Tirdea GOODIX_CMD_SCREEN_OFF); 14135ab09d6aSIrina Tirdea if (error) { 141449db3997SHans de Goede goodix_irq_direction_input(ts); 14155ab09d6aSIrina Tirdea goodix_request_irq(ts); 14165ab09d6aSIrina Tirdea return -EAGAIN; 14175ab09d6aSIrina Tirdea } 14185ab09d6aSIrina Tirdea 14195ab09d6aSIrina Tirdea /* 14205ab09d6aSIrina Tirdea * The datasheet specifies that the interval between sending screen-off 14215ab09d6aSIrina Tirdea * command and wake-up should be longer than 58 ms. To avoid waking up 14225ab09d6aSIrina Tirdea * sooner, delay 58ms here. 14235ab09d6aSIrina Tirdea */ 14245ab09d6aSIrina Tirdea msleep(58); 14255ab09d6aSIrina Tirdea return 0; 14265ab09d6aSIrina Tirdea } 14275ab09d6aSIrina Tirdea 14285ab09d6aSIrina Tirdea static int __maybe_unused goodix_resume(struct device *dev) 14295ab09d6aSIrina Tirdea { 14305ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 14315ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 1432273ec6bdSHans de Goede u8 config_ver; 14335ab09d6aSIrina Tirdea int error; 14345ab09d6aSIrina Tirdea 143549db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1436faec44b6SHans de Goede enable_irq(client->irq); 14375ab09d6aSIrina Tirdea return 0; 1438faec44b6SHans de Goede } 14395ab09d6aSIrina Tirdea 14405ab09d6aSIrina Tirdea /* 14415ab09d6aSIrina Tirdea * Exit sleep mode by outputting HIGH level to INT pin 14425ab09d6aSIrina Tirdea * for 2ms~5ms. 14435ab09d6aSIrina Tirdea */ 144449db3997SHans de Goede error = goodix_irq_direction_output(ts, 1); 14455ab09d6aSIrina Tirdea if (error) 14465ab09d6aSIrina Tirdea return error; 14475ab09d6aSIrina Tirdea 14485ab09d6aSIrina Tirdea usleep_range(2000, 5000); 14495ab09d6aSIrina Tirdea 14505ab09d6aSIrina Tirdea error = goodix_int_sync(ts); 14515ab09d6aSIrina Tirdea if (error) 14525ab09d6aSIrina Tirdea return error; 14535ab09d6aSIrina Tirdea 1454273ec6bdSHans de Goede error = goodix_i2c_read(ts->client, ts->chip->config_addr, 1455273ec6bdSHans de Goede &config_ver, 1); 14567642f29cSHans de Goede if (!error && config_ver != ts->config[0]) 1457273ec6bdSHans de Goede dev_info(dev, "Config version mismatch %d != %d, resetting controller\n", 1458273ec6bdSHans de Goede config_ver, ts->config[0]); 1459273ec6bdSHans de Goede 1460273ec6bdSHans de Goede if (error != 0 || config_ver != ts->config[0]) { 1461273ec6bdSHans de Goede error = goodix_reset(ts); 1462209bda47SHans de Goede if (error) 1463273ec6bdSHans de Goede return error; 1464273ec6bdSHans de Goede 1465273ec6bdSHans de Goede error = goodix_send_cfg(ts, ts->config, ts->chip->config_len); 1466273ec6bdSHans de Goede if (error) 1467273ec6bdSHans de Goede return error; 1468273ec6bdSHans de Goede } 1469273ec6bdSHans de Goede 14705ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 14715ab09d6aSIrina Tirdea if (error) 14725ab09d6aSIrina Tirdea return error; 14735ab09d6aSIrina Tirdea 14745ab09d6aSIrina Tirdea return 0; 14755ab09d6aSIrina Tirdea } 14765ab09d6aSIrina Tirdea 14775ab09d6aSIrina Tirdea static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume); 14785ab09d6aSIrina Tirdea 1479ca96ea86SBastien Nocera static const struct i2c_device_id goodix_ts_id[] = { 1480ca96ea86SBastien Nocera { "GDIX1001:00", 0 }, 1481ca96ea86SBastien Nocera { } 1482ca96ea86SBastien Nocera }; 14832e9e910eSJavier Martinez Canillas MODULE_DEVICE_TABLE(i2c, goodix_ts_id); 1484ca96ea86SBastien Nocera 1485771d8f1bSAleksei Mamlin #ifdef CONFIG_ACPI 1486ca96ea86SBastien Nocera static const struct acpi_device_id goodix_acpi_match[] = { 1487ca96ea86SBastien Nocera { "GDIX1001", 0 }, 14885ca4d1aeSEthan Lee { "GDIX1002", 0 }, 1489ca96ea86SBastien Nocera { } 1490ca96ea86SBastien Nocera }; 1491ca96ea86SBastien Nocera MODULE_DEVICE_TABLE(acpi, goodix_acpi_match); 1492771d8f1bSAleksei Mamlin #endif 1493771d8f1bSAleksei Mamlin 1494771d8f1bSAleksei Mamlin #ifdef CONFIG_OF 1495771d8f1bSAleksei Mamlin static const struct of_device_id goodix_of_match[] = { 149625309004SMarcin Niestroj { .compatible = "goodix,gt1151" }, 1497a5f50c50SJagan Teki { .compatible = "goodix,gt5663" }, 149884ef1b33SGuido Günther { .compatible = "goodix,gt5688" }, 1499771d8f1bSAleksei Mamlin { .compatible = "goodix,gt911" }, 1500771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9110" }, 1501771d8f1bSAleksei Mamlin { .compatible = "goodix,gt912" }, 1502b9a1c116SYannick Fertre { .compatible = "goodix,gt9147" }, 1503b5e458afSIcenowy Zheng { .compatible = "goodix,gt917s" }, 1504771d8f1bSAleksei Mamlin { .compatible = "goodix,gt927" }, 1505771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9271" }, 1506771d8f1bSAleksei Mamlin { .compatible = "goodix,gt928" }, 15072dce6db7SAngeloGioacchino Del Regno { .compatible = "goodix,gt9286" }, 1508771d8f1bSAleksei Mamlin { .compatible = "goodix,gt967" }, 1509771d8f1bSAleksei Mamlin { } 1510771d8f1bSAleksei Mamlin }; 1511771d8f1bSAleksei Mamlin MODULE_DEVICE_TABLE(of, goodix_of_match); 1512771d8f1bSAleksei Mamlin #endif 1513ca96ea86SBastien Nocera 1514ca96ea86SBastien Nocera static struct i2c_driver goodix_ts_driver = { 1515ca96ea86SBastien Nocera .probe = goodix_ts_probe, 151668caf858SIrina Tirdea .remove = goodix_ts_remove, 1517ca96ea86SBastien Nocera .id_table = goodix_ts_id, 1518ca96ea86SBastien Nocera .driver = { 1519ca96ea86SBastien Nocera .name = "Goodix-TS", 1520771d8f1bSAleksei Mamlin .acpi_match_table = ACPI_PTR(goodix_acpi_match), 1521771d8f1bSAleksei Mamlin .of_match_table = of_match_ptr(goodix_of_match), 15225ab09d6aSIrina Tirdea .pm = &goodix_pm_ops, 1523ca96ea86SBastien Nocera }, 1524ca96ea86SBastien Nocera }; 1525ca96ea86SBastien Nocera module_i2c_driver(goodix_ts_driver); 1526ca96ea86SBastien Nocera 1527ca96ea86SBastien Nocera MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); 1528ca96ea86SBastien Nocera MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>"); 1529ca96ea86SBastien Nocera MODULE_DESCRIPTION("Goodix touchscreen driver"); 1530ca96ea86SBastien Nocera MODULE_LICENSE("GPL v2"); 1531