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 }, 98425fe470SOndrej Jirman { .id = "1158", .data = >1x_chip_data }, 99cae102e2SIcenowy Zheng { .id = "5663", .data = >1x_chip_data }, 100cae102e2SIcenowy Zheng { .id = "5688", .data = >1x_chip_data }, 101b5e458afSIcenowy Zheng { .id = "917S", .data = >1x_chip_data }, 1022dce6db7SAngeloGioacchino Del Regno { .id = "9286", .data = >1x_chip_data }, 103cae102e2SIcenowy Zheng 104cae102e2SIcenowy Zheng { .id = "911", .data = >911_chip_data }, 105cae102e2SIcenowy Zheng { .id = "9271", .data = >911_chip_data }, 106cae102e2SIcenowy Zheng { .id = "9110", .data = >911_chip_data }, 10781e81886SHans de Goede { .id = "9111", .data = >911_chip_data }, 108cae102e2SIcenowy Zheng { .id = "927", .data = >911_chip_data }, 109cae102e2SIcenowy Zheng { .id = "928", .data = >911_chip_data }, 110cae102e2SIcenowy Zheng 111cae102e2SIcenowy Zheng { .id = "912", .data = >967_chip_data }, 112b9a1c116SYannick Fertre { .id = "9147", .data = >967_chip_data }, 113cae102e2SIcenowy Zheng { .id = "967", .data = >967_chip_data }, 114cae102e2SIcenowy Zheng { } 115cae102e2SIcenowy Zheng }; 116cae102e2SIcenowy Zheng 117ca96ea86SBastien Nocera static const unsigned long goodix_irq_flags[] = { 118ca96ea86SBastien Nocera IRQ_TYPE_EDGE_RISING, 119ca96ea86SBastien Nocera IRQ_TYPE_EDGE_FALLING, 120ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_LOW, 121ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_HIGH, 122ca96ea86SBastien Nocera }; 123ca96ea86SBastien Nocera 124bd3b8480SYauhen Kharuzhy static const struct dmi_system_id nine_bytes_report[] = { 125bd3b8480SYauhen Kharuzhy #if defined(CONFIG_DMI) && defined(CONFIG_X86) 126bd3b8480SYauhen Kharuzhy { 1278a0432baSHans de Goede /* Lenovo Yoga Book X90F / X90L */ 128bd3b8480SYauhen Kharuzhy .matches = { 1298a0432baSHans de Goede DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Intel Corporation"), 1308a0432baSHans de Goede DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "CHERRYVIEW D1 PLATFORM"), 1318a0432baSHans de Goede DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "YETI-11"), 1328a0432baSHans de Goede } 1338a0432baSHans de Goede }, 1348a0432baSHans de Goede { 1358a0432baSHans de Goede /* Lenovo Yoga Book X91F / X91L */ 1368a0432baSHans de Goede .matches = { 1378a0432baSHans de Goede /* Non exact match to match F + L versions */ 1388a0432baSHans de Goede DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X91"), 139bd3b8480SYauhen Kharuzhy } 140bd3b8480SYauhen Kharuzhy }, 141bd3b8480SYauhen Kharuzhy #endif 142bd3b8480SYauhen Kharuzhy {} 143bd3b8480SYauhen Kharuzhy }; 144bd3b8480SYauhen Kharuzhy 1451dd5ddc1SSergei A. Trusov /* 1461dd5ddc1SSergei A. Trusov * Those tablets have their x coordinate inverted 1471dd5ddc1SSergei A. Trusov */ 1481dd5ddc1SSergei A. Trusov static const struct dmi_system_id inverted_x_screen[] = { 1491dd5ddc1SSergei A. Trusov #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1501dd5ddc1SSergei A. Trusov { 1511dd5ddc1SSergei A. Trusov .ident = "Cube I15-TC", 1521dd5ddc1SSergei A. Trusov .matches = { 1531dd5ddc1SSergei A. Trusov DMI_MATCH(DMI_SYS_VENDOR, "Cube"), 1541dd5ddc1SSergei A. Trusov DMI_MATCH(DMI_PRODUCT_NAME, "I15-TC") 1551dd5ddc1SSergei A. Trusov }, 1561dd5ddc1SSergei A. Trusov }, 1571dd5ddc1SSergei A. Trusov #endif 1581dd5ddc1SSergei A. Trusov {} 1591dd5ddc1SSergei A. Trusov }; 1601dd5ddc1SSergei A. Trusov 161ca96ea86SBastien Nocera /** 162ca96ea86SBastien Nocera * goodix_i2c_read - read data from a register of the i2c slave device. 163ca96ea86SBastien Nocera * 164ca96ea86SBastien Nocera * @client: i2c device. 165ca96ea86SBastien Nocera * @reg: the register to read from. 166ca96ea86SBastien Nocera * @buf: raw write data buffer. 167ca96ea86SBastien Nocera * @len: length of the buffer to write 168ca96ea86SBastien Nocera */ 169a2233cb7SHans de Goede int goodix_i2c_read(struct i2c_client *client, u16 reg, u8 *buf, int len) 170ca96ea86SBastien Nocera { 171ca96ea86SBastien Nocera struct i2c_msg msgs[2]; 172fafef982SMarcin Niestroj __be16 wbuf = cpu_to_be16(reg); 173ca96ea86SBastien Nocera int ret; 174ca96ea86SBastien Nocera 175ca96ea86SBastien Nocera msgs[0].flags = 0; 176ca96ea86SBastien Nocera msgs[0].addr = client->addr; 177ca96ea86SBastien Nocera msgs[0].len = 2; 178ca96ea86SBastien Nocera msgs[0].buf = (u8 *)&wbuf; 179ca96ea86SBastien Nocera 180ca96ea86SBastien Nocera msgs[1].flags = I2C_M_RD; 181ca96ea86SBastien Nocera msgs[1].addr = client->addr; 182ca96ea86SBastien Nocera msgs[1].len = len; 183ca96ea86SBastien Nocera msgs[1].buf = buf; 184ca96ea86SBastien Nocera 185ca96ea86SBastien Nocera ret = i2c_transfer(client->adapter, msgs, 2); 1867642f29cSHans de Goede if (ret >= 0) 1877642f29cSHans de Goede ret = (ret == ARRAY_SIZE(msgs) ? 0 : -EIO); 1887642f29cSHans de Goede 1897642f29cSHans de Goede if (ret) 1907642f29cSHans de Goede dev_err(&client->dev, "Error reading %d bytes from 0x%04x: %d\n", 1917642f29cSHans de Goede len, reg, ret); 1927642f29cSHans de Goede return ret; 193ca96ea86SBastien Nocera } 194ca96ea86SBastien Nocera 19568caf858SIrina Tirdea /** 19668caf858SIrina Tirdea * goodix_i2c_write - write data to a register of the i2c slave device. 19768caf858SIrina Tirdea * 19868caf858SIrina Tirdea * @client: i2c device. 19968caf858SIrina Tirdea * @reg: the register to write to. 20068caf858SIrina Tirdea * @buf: raw data buffer to write. 20168caf858SIrina Tirdea * @len: length of the buffer to write 20268caf858SIrina Tirdea */ 203a2233cb7SHans de Goede int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf, int len) 20468caf858SIrina Tirdea { 20568caf858SIrina Tirdea u8 *addr_buf; 20668caf858SIrina Tirdea struct i2c_msg msg; 20768caf858SIrina Tirdea int ret; 20868caf858SIrina Tirdea 20968caf858SIrina Tirdea addr_buf = kmalloc(len + 2, GFP_KERNEL); 21068caf858SIrina Tirdea if (!addr_buf) 21168caf858SIrina Tirdea return -ENOMEM; 21268caf858SIrina Tirdea 21368caf858SIrina Tirdea addr_buf[0] = reg >> 8; 21468caf858SIrina Tirdea addr_buf[1] = reg & 0xFF; 21568caf858SIrina Tirdea memcpy(&addr_buf[2], buf, len); 21668caf858SIrina Tirdea 21768caf858SIrina Tirdea msg.flags = 0; 21868caf858SIrina Tirdea msg.addr = client->addr; 21968caf858SIrina Tirdea msg.buf = addr_buf; 22068caf858SIrina Tirdea msg.len = len + 2; 22168caf858SIrina Tirdea 22268caf858SIrina Tirdea ret = i2c_transfer(client->adapter, &msg, 1); 2237642f29cSHans de Goede if (ret >= 0) 2247642f29cSHans de Goede ret = (ret == 1 ? 0 : -EIO); 2257642f29cSHans de Goede 22668caf858SIrina Tirdea kfree(addr_buf); 2277642f29cSHans de Goede 2287642f29cSHans de Goede if (ret) 2297642f29cSHans de Goede dev_err(&client->dev, "Error writing %d bytes to 0x%04x: %d\n", 2307642f29cSHans de Goede len, reg, ret); 2317642f29cSHans de Goede return ret; 23268caf858SIrina Tirdea } 23368caf858SIrina Tirdea 234a2233cb7SHans de Goede int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value) 2355ab09d6aSIrina Tirdea { 2365ab09d6aSIrina Tirdea return goodix_i2c_write(client, reg, &value, sizeof(value)); 2375ab09d6aSIrina Tirdea } 2385ab09d6aSIrina Tirdea 239cae102e2SIcenowy Zheng static const struct goodix_chip_data *goodix_get_chip_data(const char *id) 240a779fbc6SIrina Tirdea { 241cae102e2SIcenowy Zheng unsigned int i; 24225309004SMarcin Niestroj 243cae102e2SIcenowy Zheng for (i = 0; goodix_chip_ids[i].id; i++) { 244cae102e2SIcenowy Zheng if (!strcmp(goodix_chip_ids[i].id, id)) 245cae102e2SIcenowy Zheng return goodix_chip_ids[i].data; 246a779fbc6SIrina Tirdea } 247cae102e2SIcenowy Zheng 248cae102e2SIcenowy Zheng return >9x_chip_data; 249a779fbc6SIrina Tirdea } 250a779fbc6SIrina Tirdea 251ca96ea86SBastien Nocera static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data) 252ca96ea86SBastien Nocera { 2539b5db7aaSPaul Cercueil unsigned long max_timeout; 254ca96ea86SBastien Nocera int touch_num; 255ca96ea86SBastien Nocera int error; 256492ee52cSDmitry Mastykin u16 addr = GOODIX_READ_COOR_ADDR; 257492ee52cSDmitry Mastykin /* 258492ee52cSDmitry Mastykin * We are going to read 1-byte header, 259492ee52cSDmitry Mastykin * ts->contact_size * max(1, touch_num) bytes of coordinates 260492ee52cSDmitry Mastykin * and 1-byte footer which contains the touch-key code. 261492ee52cSDmitry Mastykin */ 262492ee52cSDmitry Mastykin const int header_contact_keycode_size = 1 + ts->contact_size + 1; 263ca96ea86SBastien Nocera 2649b5db7aaSPaul Cercueil /* 2659b5db7aaSPaul Cercueil * The 'buffer status' bit, which indicates that the data is valid, is 2669b5db7aaSPaul Cercueil * not set as soon as the interrupt is raised, but slightly after. 2679b5db7aaSPaul Cercueil * This takes around 10 ms to happen, so we poll for 20 ms. 2689b5db7aaSPaul Cercueil */ 2699b5db7aaSPaul Cercueil max_timeout = jiffies + msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT); 2709b5db7aaSPaul Cercueil do { 271492ee52cSDmitry Mastykin error = goodix_i2c_read(ts->client, addr, data, 272492ee52cSDmitry Mastykin header_contact_keycode_size); 2737642f29cSHans de Goede if (error) 274ca96ea86SBastien Nocera return error; 275ca96ea86SBastien Nocera 2769b5db7aaSPaul Cercueil if (data[0] & GOODIX_BUFFER_STATUS_READY) { 277ca96ea86SBastien Nocera touch_num = data[0] & 0x0f; 278a7ac7c95SAleksei Mamlin if (touch_num > ts->max_touch_num) 279ca96ea86SBastien Nocera return -EPROTO; 280ca96ea86SBastien Nocera 281ca96ea86SBastien Nocera if (touch_num > 1) { 282492ee52cSDmitry Mastykin addr += header_contact_keycode_size; 283492ee52cSDmitry Mastykin data += header_contact_keycode_size; 284ca96ea86SBastien Nocera error = goodix_i2c_read(ts->client, 285492ee52cSDmitry Mastykin addr, data, 286bd3b8480SYauhen Kharuzhy ts->contact_size * 2879b5db7aaSPaul Cercueil (touch_num - 1)); 288ca96ea86SBastien Nocera if (error) 289ca96ea86SBastien Nocera return error; 290ca96ea86SBastien Nocera } 291ca96ea86SBastien Nocera 292ca96ea86SBastien Nocera return touch_num; 293ca96ea86SBastien Nocera } 294ca96ea86SBastien Nocera 29509182ed2SHans de Goede if (data[0] == 0 && ts->firmware_name) { 29609182ed2SHans de Goede if (goodix_handle_fw_request(ts)) 29709182ed2SHans de Goede return 0; 29809182ed2SHans de Goede } 29909182ed2SHans de Goede 3009b5db7aaSPaul Cercueil usleep_range(1000, 2000); /* Poll every 1 - 2 ms */ 3019b5db7aaSPaul Cercueil } while (time_before(jiffies, max_timeout)); 3029b5db7aaSPaul Cercueil 3039b5db7aaSPaul Cercueil /* 3049b5db7aaSPaul Cercueil * The Goodix panel will send spurious interrupts after a 3059b5db7aaSPaul Cercueil * 'finger up' event, which will always cause a timeout. 3069b5db7aaSPaul Cercueil */ 30724ef83f6SDmitry Mastykin return -ENOMSG; 3089b5db7aaSPaul Cercueil } 3099b5db7aaSPaul Cercueil 31065de58c2SHans de Goede static int goodix_create_pen_input(struct goodix_ts_data *ts) 3115ede7f0cSHans de Goede { 3125ede7f0cSHans de Goede struct device *dev = &ts->client->dev; 3135ede7f0cSHans de Goede struct input_dev *input; 3145ede7f0cSHans de Goede 3155ede7f0cSHans de Goede input = devm_input_allocate_device(dev); 3165ede7f0cSHans de Goede if (!input) 31765de58c2SHans de Goede return -ENOMEM; 3185ede7f0cSHans de Goede 319ae8e80c5SHans de Goede input_copy_abs(input, ABS_X, ts->input_dev, ABS_MT_POSITION_X); 320ae8e80c5SHans de Goede input_copy_abs(input, ABS_Y, ts->input_dev, ABS_MT_POSITION_Y); 3215ede7f0cSHans de Goede /* 3225ede7f0cSHans de Goede * The resolution of these touchscreens is about 10 units/mm, the actual 3235ede7f0cSHans de Goede * resolution does not matter much since we set INPUT_PROP_DIRECT. 3245ede7f0cSHans de Goede * Userspace wants something here though, so just set it to 10 units/mm. 3255ede7f0cSHans de Goede */ 3265ede7f0cSHans de Goede input_abs_set_res(input, ABS_X, 10); 3275ede7f0cSHans de Goede input_abs_set_res(input, ABS_Y, 10); 328ae8e80c5SHans de Goede input_set_abs_params(input, ABS_PRESSURE, 0, 255, 0, 0); 329ae8e80c5SHans de Goede 330ae8e80c5SHans de Goede input_set_capability(input, EV_KEY, BTN_TOUCH); 331ae8e80c5SHans de Goede input_set_capability(input, EV_KEY, BTN_TOOL_PEN); 332ae8e80c5SHans de Goede input_set_capability(input, EV_KEY, BTN_STYLUS); 333ae8e80c5SHans de Goede input_set_capability(input, EV_KEY, BTN_STYLUS2); 334ae8e80c5SHans de Goede __set_bit(INPUT_PROP_DIRECT, input->propbit); 3355ede7f0cSHans de Goede 3365ede7f0cSHans de Goede input->name = "Goodix Active Pen"; 3375ede7f0cSHans de Goede input->phys = "input/pen"; 3385ede7f0cSHans de Goede input->id.bustype = BUS_I2C; 33971f4ecd5SHans de Goede input->id.vendor = 0x0416; 3405ede7f0cSHans de Goede if (kstrtou16(ts->id, 10, &input->id.product)) 3415ede7f0cSHans de Goede input->id.product = 0x1001; 3425ede7f0cSHans de Goede input->id.version = ts->version; 3435ede7f0cSHans de Goede 34465de58c2SHans de Goede ts->input_pen = input; 34565de58c2SHans de Goede return 0; 3465ede7f0cSHans de Goede } 3475ede7f0cSHans de Goede 3485ede7f0cSHans de Goede static void goodix_ts_report_pen_down(struct goodix_ts_data *ts, u8 *data) 3495ede7f0cSHans de Goede { 35065de58c2SHans de Goede int input_x, input_y, input_w, error; 3515ede7f0cSHans de Goede u8 key_value; 3525ede7f0cSHans de Goede 35365de58c2SHans de Goede if (!ts->pen_input_registered) { 35465de58c2SHans de Goede error = input_register_device(ts->input_pen); 35565de58c2SHans de Goede ts->pen_input_registered = (error == 0) ? 1 : error; 3565ede7f0cSHans de Goede } 3575ede7f0cSHans de Goede 35865de58c2SHans de Goede if (ts->pen_input_registered < 0) 35965de58c2SHans de Goede return; 36065de58c2SHans de Goede 3615ede7f0cSHans de Goede if (ts->contact_size == 9) { 3625ede7f0cSHans de Goede input_x = get_unaligned_le16(&data[4]); 3635ede7f0cSHans de Goede input_y = get_unaligned_le16(&data[6]); 3645ede7f0cSHans de Goede input_w = get_unaligned_le16(&data[8]); 3655ede7f0cSHans de Goede } else { 3665ede7f0cSHans de Goede input_x = get_unaligned_le16(&data[2]); 3675ede7f0cSHans de Goede input_y = get_unaligned_le16(&data[4]); 3685ede7f0cSHans de Goede input_w = get_unaligned_le16(&data[6]); 3695ede7f0cSHans de Goede } 3705ede7f0cSHans de Goede 3715ede7f0cSHans de Goede touchscreen_report_pos(ts->input_pen, &ts->prop, input_x, input_y, false); 3725ede7f0cSHans de Goede input_report_abs(ts->input_pen, ABS_PRESSURE, input_w); 3735ede7f0cSHans de Goede 3745ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_TOUCH, 1); 3755ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_TOOL_PEN, 1); 3765ede7f0cSHans de Goede 3775ede7f0cSHans de Goede if (data[0] & GOODIX_HAVE_KEY) { 3785ede7f0cSHans de Goede key_value = data[1 + ts->contact_size]; 3795ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_STYLUS, key_value & 0x10); 3805ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_STYLUS2, key_value & 0x20); 3815ede7f0cSHans de Goede } else { 3825ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_STYLUS, 0); 3835ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_STYLUS2, 0); 3845ede7f0cSHans de Goede } 3855ede7f0cSHans de Goede 3865ede7f0cSHans de Goede input_sync(ts->input_pen); 3875ede7f0cSHans de Goede } 3885ede7f0cSHans de Goede 3895ede7f0cSHans de Goede static void goodix_ts_report_pen_up(struct goodix_ts_data *ts) 3905ede7f0cSHans de Goede { 3915ede7f0cSHans de Goede if (!ts->input_pen) 3925ede7f0cSHans de Goede return; 3935ede7f0cSHans de Goede 3945ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_TOUCH, 0); 3955ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_TOOL_PEN, 0); 3965ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_STYLUS, 0); 3975ede7f0cSHans de Goede input_report_key(ts->input_pen, BTN_STYLUS2, 0); 3985ede7f0cSHans de Goede 3995ede7f0cSHans de Goede input_sync(ts->input_pen); 4005ede7f0cSHans de Goede } 4015ede7f0cSHans de Goede 402bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_8b(struct goodix_ts_data *ts, u8 *coor_data) 403ca96ea86SBastien Nocera { 404ca96ea86SBastien Nocera int id = coor_data[0] & 0x0F; 405ca96ea86SBastien Nocera int input_x = get_unaligned_le16(&coor_data[1]); 406ca96ea86SBastien Nocera int input_y = get_unaligned_le16(&coor_data[3]); 407ca96ea86SBastien Nocera int input_w = get_unaligned_le16(&coor_data[5]); 408ca96ea86SBastien Nocera 409ca96ea86SBastien Nocera input_mt_slot(ts->input_dev, id); 410ca96ea86SBastien Nocera input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 411fafef982SMarcin Niestroj touchscreen_report_pos(ts->input_dev, &ts->prop, 412fafef982SMarcin Niestroj input_x, input_y, true); 413ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 414ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 415ca96ea86SBastien Nocera } 416ca96ea86SBastien Nocera 417bd3b8480SYauhen Kharuzhy static void goodix_ts_report_touch_9b(struct goodix_ts_data *ts, u8 *coor_data) 418bd3b8480SYauhen Kharuzhy { 419bd3b8480SYauhen Kharuzhy int id = coor_data[1] & 0x0F; 420bd3b8480SYauhen Kharuzhy int input_x = get_unaligned_le16(&coor_data[3]); 421bd3b8480SYauhen Kharuzhy int input_y = get_unaligned_le16(&coor_data[5]); 422bd3b8480SYauhen Kharuzhy int input_w = get_unaligned_le16(&coor_data[7]); 423bd3b8480SYauhen Kharuzhy 424bd3b8480SYauhen Kharuzhy input_mt_slot(ts->input_dev, id); 425bd3b8480SYauhen Kharuzhy input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 426bd3b8480SYauhen Kharuzhy touchscreen_report_pos(ts->input_dev, &ts->prop, 427bd3b8480SYauhen Kharuzhy input_x, input_y, true); 428bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 429bd3b8480SYauhen Kharuzhy input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 430bd3b8480SYauhen Kharuzhy } 431bd3b8480SYauhen Kharuzhy 4325ede7f0cSHans de Goede static void goodix_ts_release_keys(struct goodix_ts_data *ts) 4335ede7f0cSHans de Goede { 4345ede7f0cSHans de Goede int i; 4355ede7f0cSHans de Goede 4365ede7f0cSHans de Goede for (i = 0; i < GOODIX_MAX_KEYS; i++) 4375ede7f0cSHans de Goede input_report_key(ts->input_dev, ts->keymap[i], 0); 4385ede7f0cSHans de Goede } 4395ede7f0cSHans de Goede 440492ee52cSDmitry Mastykin static void goodix_ts_report_key(struct goodix_ts_data *ts, u8 *data) 441492ee52cSDmitry Mastykin { 442492ee52cSDmitry Mastykin int touch_num; 443492ee52cSDmitry Mastykin u8 key_value; 444492ee52cSDmitry Mastykin int i; 445492ee52cSDmitry Mastykin 446492ee52cSDmitry Mastykin if (data[0] & GOODIX_HAVE_KEY) { 447492ee52cSDmitry Mastykin touch_num = data[0] & 0x0f; 448492ee52cSDmitry Mastykin key_value = data[1 + ts->contact_size * touch_num]; 449492ee52cSDmitry Mastykin for (i = 0; i < GOODIX_MAX_KEYS; i++) 450492ee52cSDmitry Mastykin if (key_value & BIT(i)) 451492ee52cSDmitry Mastykin input_report_key(ts->input_dev, 452492ee52cSDmitry Mastykin ts->keymap[i], 1); 453492ee52cSDmitry Mastykin } else { 4545ede7f0cSHans de Goede goodix_ts_release_keys(ts); 455492ee52cSDmitry Mastykin } 456492ee52cSDmitry Mastykin } 457492ee52cSDmitry Mastykin 458ca96ea86SBastien Nocera /** 459ca96ea86SBastien Nocera * goodix_process_events - Process incoming events 460ca96ea86SBastien Nocera * 461ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 462ca96ea86SBastien Nocera * 463ca96ea86SBastien Nocera * Called when the IRQ is triggered. Read the current device state, and push 464ca96ea86SBastien Nocera * the input events to the user space. 465ca96ea86SBastien Nocera */ 466ca96ea86SBastien Nocera static void goodix_process_events(struct goodix_ts_data *ts) 467ca96ea86SBastien Nocera { 468492ee52cSDmitry Mastykin u8 point_data[2 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS]; 469ca96ea86SBastien Nocera int touch_num; 470ca96ea86SBastien Nocera int i; 471ca96ea86SBastien Nocera 472ca96ea86SBastien Nocera touch_num = goodix_ts_read_input_report(ts, point_data); 473ca96ea86SBastien Nocera if (touch_num < 0) 474ca96ea86SBastien Nocera return; 475ca96ea86SBastien Nocera 4765ede7f0cSHans de Goede /* The pen being down is always reported as a single touch */ 4775ede7f0cSHans de Goede if (touch_num == 1 && (point_data[1] & 0x80)) { 4785ede7f0cSHans de Goede goodix_ts_report_pen_down(ts, point_data); 4795ede7f0cSHans de Goede goodix_ts_release_keys(ts); 48071f4ecd5SHans de Goede goto sync; /* Release any previously registered touches */ 4815ede7f0cSHans de Goede } else { 4825ede7f0cSHans de Goede goodix_ts_report_pen_up(ts); 4835ede7f0cSHans de Goede } 4845ede7f0cSHans de Goede 485492ee52cSDmitry Mastykin goodix_ts_report_key(ts, point_data); 4864a54feeaSSergei A. Trusov 487ca96ea86SBastien Nocera for (i = 0; i < touch_num; i++) 488bd3b8480SYauhen Kharuzhy if (ts->contact_size == 9) 489bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_9b(ts, 490bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 491bd3b8480SYauhen Kharuzhy else 492bd3b8480SYauhen Kharuzhy goodix_ts_report_touch_8b(ts, 493bd3b8480SYauhen Kharuzhy &point_data[1 + ts->contact_size * i]); 494ca96ea86SBastien Nocera 4955ede7f0cSHans de Goede sync: 496ca96ea86SBastien Nocera input_mt_sync_frame(ts->input_dev); 497ca96ea86SBastien Nocera input_sync(ts->input_dev); 498ca96ea86SBastien Nocera } 499ca96ea86SBastien Nocera 500ca96ea86SBastien Nocera /** 501ca96ea86SBastien Nocera * goodix_ts_irq_handler - The IRQ handler 502ca96ea86SBastien Nocera * 503ca96ea86SBastien Nocera * @irq: interrupt number. 504ca96ea86SBastien Nocera * @dev_id: private data pointer. 505ca96ea86SBastien Nocera */ 506ca96ea86SBastien Nocera static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id) 507ca96ea86SBastien Nocera { 508ca96ea86SBastien Nocera struct goodix_ts_data *ts = dev_id; 509ca96ea86SBastien Nocera 510ca96ea86SBastien Nocera goodix_process_events(ts); 5117642f29cSHans de Goede goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0); 512ca96ea86SBastien Nocera 513ca96ea86SBastien Nocera return IRQ_HANDLED; 514ca96ea86SBastien Nocera } 515ca96ea86SBastien Nocera 5165ab09d6aSIrina Tirdea static void goodix_free_irq(struct goodix_ts_data *ts) 5175ab09d6aSIrina Tirdea { 5185ab09d6aSIrina Tirdea devm_free_irq(&ts->client->dev, ts->client->irq, ts); 5195ab09d6aSIrina Tirdea } 5205ab09d6aSIrina Tirdea 5215ab09d6aSIrina Tirdea static int goodix_request_irq(struct goodix_ts_data *ts) 5225ab09d6aSIrina Tirdea { 5235ab09d6aSIrina Tirdea return devm_request_threaded_irq(&ts->client->dev, ts->client->irq, 5245ab09d6aSIrina Tirdea NULL, goodix_ts_irq_handler, 5255ab09d6aSIrina Tirdea ts->irq_flags, ts->client->name, ts); 5265ab09d6aSIrina Tirdea } 5275ab09d6aSIrina Tirdea 5281a67448fSHans de Goede static int goodix_check_cfg_8(struct goodix_ts_data *ts, const u8 *cfg, int len) 52968caf858SIrina Tirdea { 5301a67448fSHans de Goede int i, raw_cfg_len = len - 2; 53168caf858SIrina Tirdea u8 check_sum = 0; 53268caf858SIrina Tirdea 53368caf858SIrina Tirdea for (i = 0; i < raw_cfg_len; i++) 5341a67448fSHans de Goede check_sum += cfg[i]; 53568caf858SIrina Tirdea check_sum = (~check_sum) + 1; 5361a67448fSHans de Goede if (check_sum != cfg[raw_cfg_len]) { 53768caf858SIrina Tirdea dev_err(&ts->client->dev, 53868caf858SIrina Tirdea "The checksum of the config fw is not correct"); 53968caf858SIrina Tirdea return -EINVAL; 54068caf858SIrina Tirdea } 54168caf858SIrina Tirdea 5421a67448fSHans de Goede if (cfg[raw_cfg_len + 1] != 1) { 54368caf858SIrina Tirdea dev_err(&ts->client->dev, 54468caf858SIrina Tirdea "Config fw must have Config_Fresh register set"); 54568caf858SIrina Tirdea return -EINVAL; 54668caf858SIrina Tirdea } 54768caf858SIrina Tirdea 54868caf858SIrina Tirdea return 0; 54968caf858SIrina Tirdea } 55068caf858SIrina Tirdea 551de956caeSHans de Goede static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts) 552de956caeSHans de Goede { 553de956caeSHans de Goede int i, raw_cfg_len = ts->chip->config_len - 2; 554de956caeSHans de Goede u8 check_sum = 0; 555de956caeSHans de Goede 556de956caeSHans de Goede for (i = 0; i < raw_cfg_len; i++) 557de956caeSHans de Goede check_sum += ts->config[i]; 558de956caeSHans de Goede check_sum = (~check_sum) + 1; 559de956caeSHans de Goede 560de956caeSHans de Goede ts->config[raw_cfg_len] = check_sum; 561de956caeSHans de Goede ts->config[raw_cfg_len + 1] = 1; /* Set "config_fresh" bit */ 562de956caeSHans de Goede } 563de956caeSHans de Goede 5641a67448fSHans de Goede static int goodix_check_cfg_16(struct goodix_ts_data *ts, const u8 *cfg, 5651a67448fSHans de Goede int len) 56625309004SMarcin Niestroj { 5671a67448fSHans de Goede int i, raw_cfg_len = len - 3; 56825309004SMarcin Niestroj u16 check_sum = 0; 56925309004SMarcin Niestroj 57025309004SMarcin Niestroj for (i = 0; i < raw_cfg_len; i += 2) 5711a67448fSHans de Goede check_sum += get_unaligned_be16(&cfg[i]); 57225309004SMarcin Niestroj check_sum = (~check_sum) + 1; 5731a67448fSHans de Goede if (check_sum != get_unaligned_be16(&cfg[raw_cfg_len])) { 57425309004SMarcin Niestroj dev_err(&ts->client->dev, 57525309004SMarcin Niestroj "The checksum of the config fw is not correct"); 57625309004SMarcin Niestroj return -EINVAL; 57725309004SMarcin Niestroj } 57825309004SMarcin Niestroj 5791a67448fSHans de Goede if (cfg[raw_cfg_len + 2] != 1) { 58025309004SMarcin Niestroj dev_err(&ts->client->dev, 58125309004SMarcin Niestroj "Config fw must have Config_Fresh register set"); 58225309004SMarcin Niestroj return -EINVAL; 58325309004SMarcin Niestroj } 58425309004SMarcin Niestroj 58525309004SMarcin Niestroj return 0; 58625309004SMarcin Niestroj } 58725309004SMarcin Niestroj 588de956caeSHans de Goede static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts) 589de956caeSHans de Goede { 590de956caeSHans de Goede int i, raw_cfg_len = ts->chip->config_len - 3; 591de956caeSHans de Goede u16 check_sum = 0; 592de956caeSHans de Goede 593de956caeSHans de Goede for (i = 0; i < raw_cfg_len; i += 2) 594de956caeSHans de Goede check_sum += get_unaligned_be16(&ts->config[i]); 595de956caeSHans de Goede check_sum = (~check_sum) + 1; 596de956caeSHans de Goede 597de956caeSHans de Goede put_unaligned_be16(check_sum, &ts->config[raw_cfg_len]); 598de956caeSHans de Goede ts->config[raw_cfg_len + 2] = 1; /* Set "config_fresh" bit */ 599de956caeSHans de Goede } 600de956caeSHans de Goede 60125309004SMarcin Niestroj /** 60225309004SMarcin Niestroj * goodix_check_cfg - Checks if config fw is valid 60325309004SMarcin Niestroj * 60425309004SMarcin Niestroj * @ts: goodix_ts_data pointer 60525309004SMarcin Niestroj * @cfg: firmware config data 606cb690465SLee Jones * @len: config data length 60725309004SMarcin Niestroj */ 6081a67448fSHans de Goede static int goodix_check_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) 60925309004SMarcin Niestroj { 6101a67448fSHans de Goede if (len < GOODIX_CONFIG_MIN_LENGTH || 6111a67448fSHans de Goede len > GOODIX_CONFIG_MAX_LENGTH) { 61225309004SMarcin Niestroj dev_err(&ts->client->dev, 61325309004SMarcin Niestroj "The length of the config fw is not correct"); 61425309004SMarcin Niestroj return -EINVAL; 61525309004SMarcin Niestroj } 61625309004SMarcin Niestroj 6171a67448fSHans de Goede return ts->chip->check_config(ts, cfg, len); 61825309004SMarcin Niestroj } 61925309004SMarcin Niestroj 62068caf858SIrina Tirdea /** 62168caf858SIrina Tirdea * goodix_send_cfg - Write fw config to device 62268caf858SIrina Tirdea * 62368caf858SIrina Tirdea * @ts: goodix_ts_data pointer 62468caf858SIrina Tirdea * @cfg: config firmware to write to device 625cb690465SLee Jones * @len: config data length 62668caf858SIrina Tirdea */ 627a2233cb7SHans de Goede int goodix_send_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) 62868caf858SIrina Tirdea { 62968caf858SIrina Tirdea int error; 63068caf858SIrina Tirdea 6311a67448fSHans de Goede error = goodix_check_cfg(ts, cfg, len); 63268caf858SIrina Tirdea if (error) 63368caf858SIrina Tirdea return error; 63468caf858SIrina Tirdea 6351a67448fSHans de Goede error = goodix_i2c_write(ts->client, ts->chip->config_addr, cfg, len); 6367642f29cSHans de Goede if (error) 63768caf858SIrina Tirdea return error; 6387642f29cSHans de Goede 63968caf858SIrina Tirdea dev_dbg(&ts->client->dev, "Config sent successfully."); 64068caf858SIrina Tirdea 64168caf858SIrina Tirdea /* Let the firmware reconfigure itself, so sleep for 10ms */ 64268caf858SIrina Tirdea usleep_range(10000, 11000); 64368caf858SIrina Tirdea 64468caf858SIrina Tirdea return 0; 64568caf858SIrina Tirdea } 64668caf858SIrina Tirdea 647c9c20ee3SHans de Goede #ifdef ACPI_GPIO_SUPPORT 648c9c20ee3SHans de Goede static int goodix_pin_acpi_direction_input(struct goodix_ts_data *ts) 64949db3997SHans de Goede { 650c9c20ee3SHans de Goede acpi_handle handle = ACPI_HANDLE(&ts->client->dev); 651c5fca485SHans de Goede acpi_status status; 652c5fca485SHans de Goede 653c9c20ee3SHans de Goede status = acpi_evaluate_object(handle, "INTI", NULL, NULL); 654c9c20ee3SHans de Goede return ACPI_SUCCESS(status) ? 0 : -EIO; 655c9c20ee3SHans de Goede } 656c9c20ee3SHans de Goede 657c9c20ee3SHans de Goede static int goodix_pin_acpi_output_method(struct goodix_ts_data *ts, int value) 658c9c20ee3SHans de Goede { 659c9c20ee3SHans de Goede acpi_handle handle = ACPI_HANDLE(&ts->client->dev); 660c9c20ee3SHans de Goede acpi_status status; 661c9c20ee3SHans de Goede 662c9c20ee3SHans de Goede status = acpi_execute_simple_method(handle, "INTO", value); 663c9c20ee3SHans de Goede return ACPI_SUCCESS(status) ? 0 : -EIO; 664c9c20ee3SHans de Goede } 665c9c20ee3SHans de Goede #else 666c9c20ee3SHans de Goede static int goodix_pin_acpi_direction_input(struct goodix_ts_data *ts) 667c9c20ee3SHans de Goede { 668c9c20ee3SHans de Goede dev_err(&ts->client->dev, 669c9c20ee3SHans de Goede "%s called on device without ACPI support\n", __func__); 670c9c20ee3SHans de Goede return -EINVAL; 671c9c20ee3SHans de Goede } 672c9c20ee3SHans de Goede 673c9c20ee3SHans de Goede static int goodix_pin_acpi_output_method(struct goodix_ts_data *ts, int value) 674c9c20ee3SHans de Goede { 675c9c20ee3SHans de Goede dev_err(&ts->client->dev, 676c9c20ee3SHans de Goede "%s called on device without ACPI support\n", __func__); 677c9c20ee3SHans de Goede return -EINVAL; 678c9c20ee3SHans de Goede } 679c9c20ee3SHans de Goede #endif 680c9c20ee3SHans de Goede 681c9c20ee3SHans de Goede static int goodix_irq_direction_output(struct goodix_ts_data *ts, int value) 682c9c20ee3SHans de Goede { 68349db3997SHans de Goede switch (ts->irq_pin_access_method) { 68449db3997SHans de Goede case IRQ_PIN_ACCESS_NONE: 68549db3997SHans de Goede dev_err(&ts->client->dev, 68649db3997SHans de Goede "%s called without an irq_pin_access_method set\n", 68749db3997SHans de Goede __func__); 68849db3997SHans de Goede return -EINVAL; 68949db3997SHans de Goede case IRQ_PIN_ACCESS_GPIO: 69049db3997SHans de Goede return gpiod_direction_output(ts->gpiod_int, value); 691a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 692a7d4b171SHans de Goede /* 693a7d4b171SHans de Goede * The IRQ pin triggers on a falling edge, so its gets marked 694a7d4b171SHans de Goede * as active-low, use output_raw to avoid the value inversion. 695a7d4b171SHans de Goede */ 696a7d4b171SHans de Goede return gpiod_direction_output_raw(ts->gpiod_int, value); 697c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 698c9c20ee3SHans de Goede return goodix_pin_acpi_output_method(ts, value); 69949db3997SHans de Goede } 70049db3997SHans de Goede 70149db3997SHans de Goede return -EINVAL; /* Never reached */ 70249db3997SHans de Goede } 70349db3997SHans de Goede 70449db3997SHans de Goede static int goodix_irq_direction_input(struct goodix_ts_data *ts) 70549db3997SHans de Goede { 70649db3997SHans de Goede switch (ts->irq_pin_access_method) { 70749db3997SHans de Goede case IRQ_PIN_ACCESS_NONE: 70849db3997SHans de Goede dev_err(&ts->client->dev, 70949db3997SHans de Goede "%s called without an irq_pin_access_method set\n", 71049db3997SHans de Goede __func__); 71149db3997SHans de Goede return -EINVAL; 71249db3997SHans de Goede case IRQ_PIN_ACCESS_GPIO: 713c9c20ee3SHans de Goede return gpiod_direction_input(ts->gpiod_int); 714a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 71549db3997SHans de Goede return gpiod_direction_input(ts->gpiod_int); 716c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 717c9c20ee3SHans de Goede return goodix_pin_acpi_direction_input(ts); 71849db3997SHans de Goede } 71949db3997SHans de Goede 72049db3997SHans de Goede return -EINVAL; /* Never reached */ 72149db3997SHans de Goede } 72249db3997SHans de Goede 723a2233cb7SHans de Goede int goodix_int_sync(struct goodix_ts_data *ts) 724ec6e1b40SIrina Tirdea { 725ec6e1b40SIrina Tirdea int error; 726ec6e1b40SIrina Tirdea 72749db3997SHans de Goede error = goodix_irq_direction_output(ts, 0); 728ec6e1b40SIrina Tirdea if (error) 729209bda47SHans de Goede goto error; 730ec6e1b40SIrina Tirdea 731ec6e1b40SIrina Tirdea msleep(50); /* T5: 50ms */ 732ec6e1b40SIrina Tirdea 73349db3997SHans de Goede error = goodix_irq_direction_input(ts); 734ec6e1b40SIrina Tirdea if (error) 735209bda47SHans de Goede goto error; 736ec6e1b40SIrina Tirdea 737ec6e1b40SIrina Tirdea return 0; 738209bda47SHans de Goede 739209bda47SHans de Goede error: 740209bda47SHans de Goede dev_err(&ts->client->dev, "Controller irq sync failed.\n"); 741209bda47SHans de Goede return error; 742209bda47SHans de Goede } 743209bda47SHans de Goede 744209bda47SHans de Goede /** 745209bda47SHans de Goede * goodix_reset_no_int_sync - Reset device, leaving interrupt line in output mode 746209bda47SHans de Goede * 747209bda47SHans de Goede * @ts: goodix_ts_data pointer 748209bda47SHans de Goede */ 749209bda47SHans de Goede int goodix_reset_no_int_sync(struct goodix_ts_data *ts) 750209bda47SHans de Goede { 751209bda47SHans de Goede int error; 752209bda47SHans de Goede 753209bda47SHans de Goede /* begin select I2C slave addr */ 754209bda47SHans de Goede error = gpiod_direction_output(ts->gpiod_rst, 0); 755209bda47SHans de Goede if (error) 756209bda47SHans de Goede goto error; 757209bda47SHans de Goede 758209bda47SHans de Goede msleep(20); /* T2: > 10ms */ 759209bda47SHans de Goede 760209bda47SHans de Goede /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */ 761209bda47SHans de Goede error = goodix_irq_direction_output(ts, ts->client->addr == 0x14); 762209bda47SHans de Goede if (error) 763209bda47SHans de Goede goto error; 764209bda47SHans de Goede 765209bda47SHans de Goede usleep_range(100, 2000); /* T3: > 100us */ 766209bda47SHans de Goede 767209bda47SHans de Goede error = gpiod_direction_output(ts->gpiod_rst, 1); 768209bda47SHans de Goede if (error) 769209bda47SHans de Goede goto error; 770209bda47SHans de Goede 771209bda47SHans de Goede usleep_range(6000, 10000); /* T4: > 5ms */ 772209bda47SHans de Goede 773a2fd46cdSHans de Goede /* 774a2fd46cdSHans de Goede * Put the reset pin back in to input / high-impedance mode to save 775a2fd46cdSHans de Goede * power. Only do this in the non ACPI case since some ACPI boards 776a2fd46cdSHans de Goede * don't have a pull-up, so there the reset pin must stay active-high. 777a2fd46cdSHans de Goede */ 778a2fd46cdSHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_GPIO) { 779209bda47SHans de Goede error = gpiod_direction_input(ts->gpiod_rst); 780209bda47SHans de Goede if (error) 781209bda47SHans de Goede goto error; 782a2fd46cdSHans de Goede } 783209bda47SHans de Goede 784209bda47SHans de Goede return 0; 785209bda47SHans de Goede 786209bda47SHans de Goede error: 787209bda47SHans de Goede dev_err(&ts->client->dev, "Controller reset failed.\n"); 788209bda47SHans de Goede return error; 789ec6e1b40SIrina Tirdea } 790ec6e1b40SIrina Tirdea 791ec6e1b40SIrina Tirdea /** 792ec6e1b40SIrina Tirdea * goodix_reset - Reset device during power on 793ec6e1b40SIrina Tirdea * 794ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 795ec6e1b40SIrina Tirdea */ 796ec6e1b40SIrina Tirdea static int goodix_reset(struct goodix_ts_data *ts) 797ec6e1b40SIrina Tirdea { 798ec6e1b40SIrina Tirdea int error; 799ec6e1b40SIrina Tirdea 800209bda47SHans de Goede error = goodix_reset_no_int_sync(ts); 801ec6e1b40SIrina Tirdea if (error) 802ec6e1b40SIrina Tirdea return error; 803ec6e1b40SIrina Tirdea 804209bda47SHans de Goede return goodix_int_sync(ts); 805ec6e1b40SIrina Tirdea } 806ec6e1b40SIrina Tirdea 807c9c20ee3SHans de Goede #ifdef ACPI_GPIO_SUPPORT 808a7d4b171SHans de Goede static const struct acpi_gpio_params first_gpio = { 0, 0, false }; 809a7d4b171SHans de Goede static const struct acpi_gpio_params second_gpio = { 1, 0, false }; 810a7d4b171SHans de Goede 811a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_first_gpios[] = { 812a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &first_gpio, 1 }, 813a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &second_gpio, 1 }, 814a7d4b171SHans de Goede { }, 815a7d4b171SHans de Goede }; 816a7d4b171SHans de Goede 817a7d4b171SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_int_last_gpios[] = { 818a7d4b171SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 819a7d4b171SHans de Goede { GOODIX_GPIO_INT_NAME "-gpios", &second_gpio, 1 }, 820a7d4b171SHans de Goede { }, 821a7d4b171SHans de Goede }; 822a7d4b171SHans de Goede 823c5fca485SHans de Goede static const struct acpi_gpio_mapping acpi_goodix_reset_only_gpios[] = { 824c5fca485SHans de Goede { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 825c5fca485SHans de Goede { }, 826c5fca485SHans de Goede }; 827c5fca485SHans de Goede 828a7d4b171SHans de Goede static int goodix_resource(struct acpi_resource *ares, void *data) 829a7d4b171SHans de Goede { 830a7d4b171SHans de Goede struct goodix_ts_data *ts = data; 831a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 832a7d4b171SHans de Goede struct acpi_resource_gpio *gpio; 833a7d4b171SHans de Goede 834c4bcc1b9SAndy Shevchenko if (acpi_gpio_get_irq_resource(ares, &gpio)) { 835a7d4b171SHans de Goede if (ts->gpio_int_idx == -1) { 836a7d4b171SHans de Goede ts->gpio_int_idx = ts->gpio_count; 837a7d4b171SHans de Goede } else { 838a7d4b171SHans de Goede dev_err(dev, "More then one GpioInt resource, ignoring ACPI GPIO resources\n"); 839a7d4b171SHans de Goede ts->gpio_int_idx = -2; 840a7d4b171SHans de Goede } 841a7d4b171SHans de Goede ts->gpio_count++; 842c4bcc1b9SAndy Shevchenko } else if (acpi_gpio_get_io_resource(ares, &gpio)) 843c4bcc1b9SAndy Shevchenko ts->gpio_count++; 844a7d4b171SHans de Goede 845a7d4b171SHans de Goede return 0; 846a7d4b171SHans de Goede } 847a7d4b171SHans de Goede 848a7d4b171SHans de Goede /* 849a7d4b171SHans de Goede * This function gets called in case we fail to get the irq GPIO directly 850a7d4b171SHans de Goede * because the ACPI tables lack GPIO-name to APCI _CRS index mappings 851a7d4b171SHans de Goede * (no _DSD UUID daffd814-6eba-4d8c-8a91-bc9bbf4aa301 data). 852a7d4b171SHans de Goede * In that case we add our own mapping and then goodix_get_gpio_config() 853a7d4b171SHans de Goede * retries to get the GPIOs based on the added mapping. 854a7d4b171SHans de Goede */ 855a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 856a7d4b171SHans de Goede { 857a7d4b171SHans de Goede const struct acpi_gpio_mapping *gpio_mapping = NULL; 858a7d4b171SHans de Goede struct device *dev = &ts->client->dev; 859a7d4b171SHans de Goede LIST_HEAD(resources); 860d9829926SHans de Goede int irq, ret; 861a7d4b171SHans de Goede 862a7d4b171SHans de Goede ts->gpio_count = 0; 863a7d4b171SHans de Goede ts->gpio_int_idx = -1; 864a7d4b171SHans de Goede ret = acpi_dev_get_resources(ACPI_COMPANION(dev), &resources, 865a7d4b171SHans de Goede goodix_resource, ts); 866a7d4b171SHans de Goede if (ret < 0) { 867a7d4b171SHans de Goede dev_err(dev, "Error getting ACPI resources: %d\n", ret); 868a7d4b171SHans de Goede return ret; 869a7d4b171SHans de Goede } 870a7d4b171SHans de Goede 871a7d4b171SHans de Goede acpi_dev_free_resource_list(&resources); 872a7d4b171SHans de Goede 873d9829926SHans de Goede /* 874d9829926SHans de Goede * CHT devices should have a GpioInt + a regular GPIO ACPI resource. 875d9829926SHans de Goede * Some CHT devices have a bug (where the also is bogus Interrupt 876d9829926SHans de Goede * resource copied from a previous BYT based generation). i2c-core-acpi 877d9829926SHans de Goede * will use the non-working Interrupt resource, fix this up. 878d9829926SHans de Goede */ 879d9829926SHans de Goede if (soc_intel_is_cht() && ts->gpio_count == 2 && ts->gpio_int_idx != -1) { 880d9829926SHans de Goede irq = acpi_dev_gpio_irq_get(ACPI_COMPANION(dev), 0); 881d9829926SHans de Goede if (irq > 0 && irq != ts->client->irq) { 882d9829926SHans de Goede dev_warn(dev, "Overriding IRQ %d -> %d\n", ts->client->irq, irq); 883d9829926SHans de Goede ts->client->irq = irq; 884d9829926SHans de Goede } 885d9829926SHans de Goede } 886d9829926SHans de Goede 887a7d4b171SHans de Goede if (ts->gpio_count == 2 && ts->gpio_int_idx == 0) { 888a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 889a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_first_gpios; 890a7d4b171SHans de Goede } else if (ts->gpio_count == 2 && ts->gpio_int_idx == 1) { 891a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 892a7d4b171SHans de Goede gpio_mapping = acpi_goodix_int_last_gpios; 893c5fca485SHans de Goede } else if (ts->gpio_count == 1 && ts->gpio_int_idx == -1 && 894c5fca485SHans de Goede acpi_has_method(ACPI_HANDLE(dev), "INTI") && 895c5fca485SHans de Goede acpi_has_method(ACPI_HANDLE(dev), "INTO")) { 896c5fca485SHans de Goede dev_info(dev, "Using ACPI INTI and INTO methods for IRQ pin access\n"); 897c5fca485SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_METHOD; 898c5fca485SHans de Goede gpio_mapping = acpi_goodix_reset_only_gpios; 899d176708fSHans de Goede } else if (soc_intel_is_byt() && ts->gpio_count == 2 && ts->gpio_int_idx == -1) { 90067abd9eeSHans de Goede dev_info(dev, "No ACPI GpioInt resource, assuming that the GPIO order is reset, int\n"); 90167abd9eeSHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 90267abd9eeSHans de Goede gpio_mapping = acpi_goodix_int_last_gpios; 903a7d4b171SHans de Goede } else { 904a7d4b171SHans de Goede dev_warn(dev, "Unexpected ACPI resources: gpio_count %d, gpio_int_idx %d\n", 905a7d4b171SHans de Goede ts->gpio_count, ts->gpio_int_idx); 9063de93e6eSHans de Goede /* 9073de93e6eSHans de Goede * On some devices _PS0 does a reset for us and 9083de93e6eSHans de Goede * sometimes this is necessary for things to work. 9093de93e6eSHans de Goede */ 9103de93e6eSHans de Goede acpi_device_fix_up_power(ACPI_COMPANION(dev)); 911a7d4b171SHans de Goede return -EINVAL; 912a7d4b171SHans de Goede } 913a7d4b171SHans de Goede 914a2fd46cdSHans de Goede /* 915a2fd46cdSHans de Goede * Normally we put the reset pin in input / high-impedance mode to save 916a2fd46cdSHans de Goede * power. But some x86/ACPI boards don't have a pull-up, so for the ACPI 917a2fd46cdSHans de Goede * case, leave the pin as is. This results in the pin not being touched 918a2fd46cdSHans de Goede * at all on x86/ACPI boards, except when needed for error-recover. 919a2fd46cdSHans de Goede */ 920a2fd46cdSHans de Goede ts->gpiod_rst_flags = GPIOD_ASIS; 921a2fd46cdSHans de Goede 922a7d4b171SHans de Goede return devm_acpi_dev_add_driver_gpios(dev, gpio_mapping); 923a7d4b171SHans de Goede } 924a7d4b171SHans de Goede #else 925a7d4b171SHans de Goede static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 926a7d4b171SHans de Goede { 927a7d4b171SHans de Goede return -EINVAL; 928a7d4b171SHans de Goede } 929a7d4b171SHans de Goede #endif /* CONFIG_X86 && CONFIG_ACPI */ 930a7d4b171SHans de Goede 931ec6e1b40SIrina Tirdea /** 932ec6e1b40SIrina Tirdea * goodix_get_gpio_config - Get GPIO config from ACPI/DT 933ec6e1b40SIrina Tirdea * 934ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 935ec6e1b40SIrina Tirdea */ 936ec6e1b40SIrina Tirdea static int goodix_get_gpio_config(struct goodix_ts_data *ts) 937ec6e1b40SIrina Tirdea { 938ec6e1b40SIrina Tirdea int error; 939ec6e1b40SIrina Tirdea struct device *dev; 940ec6e1b40SIrina Tirdea struct gpio_desc *gpiod; 941a7d4b171SHans de Goede bool added_acpi_mappings = false; 942ec6e1b40SIrina Tirdea 943ec6e1b40SIrina Tirdea if (!ts->client) 944ec6e1b40SIrina Tirdea return -EINVAL; 945ec6e1b40SIrina Tirdea dev = &ts->client->dev; 946ec6e1b40SIrina Tirdea 947a2fd46cdSHans de Goede /* 948a2fd46cdSHans de Goede * By default we request the reset pin as input, leaving it in 949a2fd46cdSHans de Goede * high-impedance when not resetting the controller to save power. 950a2fd46cdSHans de Goede */ 951a2fd46cdSHans de Goede ts->gpiod_rst_flags = GPIOD_IN; 952a2fd46cdSHans de Goede 953ae97fb58SJagan Teki ts->avdd28 = devm_regulator_get(dev, "AVDD28"); 954ae97fb58SJagan Teki if (IS_ERR(ts->avdd28)) { 955ae97fb58SJagan Teki error = PTR_ERR(ts->avdd28); 956ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 957ae97fb58SJagan Teki dev_err(dev, 958ae97fb58SJagan Teki "Failed to get AVDD28 regulator: %d\n", error); 959ae97fb58SJagan Teki return error; 960ae97fb58SJagan Teki } 961ae97fb58SJagan Teki 962ae97fb58SJagan Teki ts->vddio = devm_regulator_get(dev, "VDDIO"); 963ae97fb58SJagan Teki if (IS_ERR(ts->vddio)) { 964ae97fb58SJagan Teki error = PTR_ERR(ts->vddio); 965ae97fb58SJagan Teki if (error != -EPROBE_DEFER) 966ae97fb58SJagan Teki dev_err(dev, 967ae97fb58SJagan Teki "Failed to get VDDIO regulator: %d\n", error); 968ae97fb58SJagan Teki return error; 969ae97fb58SJagan Teki } 970ae97fb58SJagan Teki 971a7d4b171SHans de Goede retry_get_irq_gpio: 972ec6e1b40SIrina Tirdea /* Get the interrupt GPIO pin number */ 973ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN); 974ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 975ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 976ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 97784345c61SHans de Goede dev_err(dev, "Failed to get %s GPIO: %d\n", 978ec6e1b40SIrina Tirdea GOODIX_GPIO_INT_NAME, error); 979ec6e1b40SIrina Tirdea return error; 980ec6e1b40SIrina Tirdea } 981a7d4b171SHans de Goede if (!gpiod && has_acpi_companion(dev) && !added_acpi_mappings) { 982a7d4b171SHans de Goede added_acpi_mappings = true; 983a7d4b171SHans de Goede if (goodix_add_acpi_gpio_mappings(ts) == 0) 984a7d4b171SHans de Goede goto retry_get_irq_gpio; 985a7d4b171SHans de Goede } 986ec6e1b40SIrina Tirdea 987ec6e1b40SIrina Tirdea ts->gpiod_int = gpiod; 988ec6e1b40SIrina Tirdea 989ec6e1b40SIrina Tirdea /* Get the reset line GPIO pin number */ 990a2fd46cdSHans de Goede gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, ts->gpiod_rst_flags); 991ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 992ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 993ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 99484345c61SHans de Goede dev_err(dev, "Failed to get %s GPIO: %d\n", 995ec6e1b40SIrina Tirdea GOODIX_GPIO_RST_NAME, error); 996ec6e1b40SIrina Tirdea return error; 997ec6e1b40SIrina Tirdea } 998ec6e1b40SIrina Tirdea 999ec6e1b40SIrina Tirdea ts->gpiod_rst = gpiod; 1000ec6e1b40SIrina Tirdea 1001a7d4b171SHans de Goede switch (ts->irq_pin_access_method) { 1002a7d4b171SHans de Goede case IRQ_PIN_ACCESS_ACPI_GPIO: 1003a7d4b171SHans de Goede /* 1004a7d4b171SHans de Goede * We end up here if goodix_add_acpi_gpio_mappings() has 1005a7d4b171SHans de Goede * called devm_acpi_dev_add_driver_gpios() because the ACPI 1006a7d4b171SHans de Goede * tables did not contain name to index mappings. 1007a7d4b171SHans de Goede * Check that we successfully got both GPIOs after we've 1008a7d4b171SHans de Goede * added our own acpi_gpio_mapping and if we did not get both 1009a7d4b171SHans de Goede * GPIOs reset irq_pin_access_method to IRQ_PIN_ACCESS_NONE. 1010a7d4b171SHans de Goede */ 1011a7d4b171SHans de Goede if (!ts->gpiod_int || !ts->gpiod_rst) 1012a7d4b171SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 1013a7d4b171SHans de Goede break; 1014c5fca485SHans de Goede case IRQ_PIN_ACCESS_ACPI_METHOD: 1015c5fca485SHans de Goede if (!ts->gpiod_rst) 1016c5fca485SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 1017c5fca485SHans de Goede break; 1018a7d4b171SHans de Goede default: 1019e070a97bSHans de Goede if (ts->gpiod_int && ts->gpiod_rst) { 10201921daceSHans de Goede ts->reset_controller_at_probe = true; 1021e070a97bSHans de Goede ts->load_cfg_from_disk = true; 102249db3997SHans de Goede ts->irq_pin_access_method = IRQ_PIN_ACCESS_GPIO; 1023e070a97bSHans de Goede } 1024a7d4b171SHans de Goede } 102549db3997SHans de Goede 1026ec6e1b40SIrina Tirdea return 0; 1027ec6e1b40SIrina Tirdea } 1028ec6e1b40SIrina Tirdea 1029ca96ea86SBastien Nocera /** 1030ca96ea86SBastien Nocera * goodix_read_config - Read the embedded configuration of the panel 1031ca96ea86SBastien Nocera * 1032ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 1033ca96ea86SBastien Nocera * 1034ca96ea86SBastien Nocera * Must be called during probe 1035ca96ea86SBastien Nocera */ 1036ca96ea86SBastien Nocera static void goodix_read_config(struct goodix_ts_data *ts) 1037ca96ea86SBastien Nocera { 1038fafef982SMarcin Niestroj int x_max, y_max; 1039ca96ea86SBastien Nocera int error; 1040ca96ea86SBastien Nocera 104109182ed2SHans de Goede /* 104209182ed2SHans de Goede * On controllers where we need to upload the firmware 104309182ed2SHans de Goede * (controllers without flash) ts->config already has the config 104409182ed2SHans de Goede * at this point and the controller itself does not have it yet! 104509182ed2SHans de Goede */ 104609182ed2SHans de Goede if (!ts->firmware_name) { 104725309004SMarcin Niestroj error = goodix_i2c_read(ts->client, ts->chip->config_addr, 1048de956caeSHans de Goede ts->config, ts->chip->config_len); 1049ca96ea86SBastien Nocera if (error) { 1050ca96ea86SBastien Nocera ts->int_trigger_type = GOODIX_INT_TRIGGER; 1051a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 1052ca96ea86SBastien Nocera return; 1053ca96ea86SBastien Nocera } 105409182ed2SHans de Goede } 1055ca96ea86SBastien Nocera 1056de956caeSHans de Goede ts->int_trigger_type = ts->config[TRIGGER_LOC] & 0x03; 1057de956caeSHans de Goede ts->max_touch_num = ts->config[MAX_CONTACTS_LOC] & 0x0f; 10588b5a359cSBastien Nocera 1059de956caeSHans de Goede x_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC]); 1060de956caeSHans de Goede y_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC + 2]); 1061fafef982SMarcin Niestroj if (x_max && y_max) { 1062fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_X, x_max - 1); 1063fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, ABS_MT_POSITION_Y, y_max - 1); 1064ca96ea86SBastien Nocera } 1065de956caeSHans de Goede 1066de956caeSHans de Goede ts->chip->calc_config_checksum(ts); 106757c80e8eSKarsten Merker } 1068ca96ea86SBastien Nocera 1069ca96ea86SBastien Nocera /** 1070ca96ea86SBastien Nocera * goodix_read_version - Read goodix touchscreen version 1071ca96ea86SBastien Nocera * 107268caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 1073ca96ea86SBastien Nocera */ 107468caf858SIrina Tirdea static int goodix_read_version(struct goodix_ts_data *ts) 1075ca96ea86SBastien Nocera { 1076ca96ea86SBastien Nocera int error; 1077ca96ea86SBastien Nocera u8 buf[6]; 1078cae102e2SIcenowy Zheng char id_str[GOODIX_ID_MAX_LEN + 1]; 1079ca96ea86SBastien Nocera 108068caf858SIrina Tirdea error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf)); 10817642f29cSHans de Goede if (error) 1082ca96ea86SBastien Nocera return error; 1083ca96ea86SBastien Nocera 1084cae102e2SIcenowy Zheng memcpy(id_str, buf, GOODIX_ID_MAX_LEN); 1085cae102e2SIcenowy Zheng id_str[GOODIX_ID_MAX_LEN] = 0; 1086cae102e2SIcenowy Zheng strscpy(ts->id, id_str, GOODIX_ID_MAX_LEN + 1); 1087e70b0307SIrina Tirdea 108868caf858SIrina Tirdea ts->version = get_unaligned_le16(&buf[4]); 1089ca96ea86SBastien Nocera 1090cae102e2SIcenowy Zheng dev_info(&ts->client->dev, "ID %s, version: %04x\n", ts->id, 109168caf858SIrina Tirdea ts->version); 1092ca96ea86SBastien Nocera 1093ca96ea86SBastien Nocera return 0; 1094ca96ea86SBastien Nocera } 1095ca96ea86SBastien Nocera 1096ca96ea86SBastien Nocera /** 1097ca96ea86SBastien Nocera * goodix_i2c_test - I2C test function to check if the device answers. 1098ca96ea86SBastien Nocera * 1099ca96ea86SBastien Nocera * @client: the i2c client 1100ca96ea86SBastien Nocera */ 1101ca96ea86SBastien Nocera static int goodix_i2c_test(struct i2c_client *client) 1102ca96ea86SBastien Nocera { 1103ca96ea86SBastien Nocera int retry = 0; 1104ca96ea86SBastien Nocera int error; 1105ca96ea86SBastien Nocera u8 test; 1106ca96ea86SBastien Nocera 1107ca96ea86SBastien Nocera while (retry++ < 2) { 11087642f29cSHans de Goede error = goodix_i2c_read(client, GOODIX_REG_ID, &test, 1); 1109ca96ea86SBastien Nocera if (!error) 1110ca96ea86SBastien Nocera return 0; 1111ca96ea86SBastien Nocera 1112ca96ea86SBastien Nocera msleep(20); 1113ca96ea86SBastien Nocera } 1114ca96ea86SBastien Nocera 1115ca96ea86SBastien Nocera return error; 1116ca96ea86SBastien Nocera } 1117ca96ea86SBastien Nocera 1118ca96ea86SBastien Nocera /** 111968caf858SIrina Tirdea * goodix_configure_dev - Finish device initialization 112068caf858SIrina Tirdea * 112168caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 112268caf858SIrina Tirdea * 112368caf858SIrina Tirdea * Must be called from probe to finish initialization of the device. 112468caf858SIrina Tirdea * Contains the common initialization code for both devices that 112568caf858SIrina Tirdea * declare gpio pins and devices that do not. It is either called 112668caf858SIrina Tirdea * directly from probe or from request_firmware_wait callback. 112768caf858SIrina Tirdea */ 112868caf858SIrina Tirdea static int goodix_configure_dev(struct goodix_ts_data *ts) 112968caf858SIrina Tirdea { 113068caf858SIrina Tirdea int error; 1131492ee52cSDmitry Mastykin int i; 113268caf858SIrina Tirdea 1133fafef982SMarcin Niestroj ts->int_trigger_type = GOODIX_INT_TRIGGER; 1134fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 1135ad48cf5eSKarsten Merker 1136fafef982SMarcin Niestroj ts->input_dev = devm_input_allocate_device(&ts->client->dev); 1137fafef982SMarcin Niestroj if (!ts->input_dev) { 1138fafef982SMarcin Niestroj dev_err(&ts->client->dev, "Failed to allocate input device."); 1139fafef982SMarcin Niestroj return -ENOMEM; 1140fafef982SMarcin Niestroj } 1141fafef982SMarcin Niestroj 1142fafef982SMarcin Niestroj ts->input_dev->name = "Goodix Capacitive TouchScreen"; 1143fafef982SMarcin Niestroj ts->input_dev->phys = "input/ts"; 1144fafef982SMarcin Niestroj ts->input_dev->id.bustype = BUS_I2C; 1145fafef982SMarcin Niestroj ts->input_dev->id.vendor = 0x0416; 1146cae102e2SIcenowy Zheng if (kstrtou16(ts->id, 10, &ts->input_dev->id.product)) 1147cae102e2SIcenowy Zheng ts->input_dev->id.product = 0x1001; 1148fafef982SMarcin Niestroj ts->input_dev->id.version = ts->version; 1149fafef982SMarcin Niestroj 1150492ee52cSDmitry Mastykin ts->input_dev->keycode = ts->keymap; 1151492ee52cSDmitry Mastykin ts->input_dev->keycodesize = sizeof(ts->keymap[0]); 1152492ee52cSDmitry Mastykin ts->input_dev->keycodemax = GOODIX_MAX_KEYS; 1153492ee52cSDmitry Mastykin 1154fafef982SMarcin Niestroj /* Capacitive Windows/Home button on some devices */ 1155492ee52cSDmitry Mastykin for (i = 0; i < GOODIX_MAX_KEYS; ++i) { 1156492ee52cSDmitry Mastykin if (i == 0) 1157492ee52cSDmitry Mastykin ts->keymap[i] = KEY_LEFTMETA; 1158492ee52cSDmitry Mastykin else 1159492ee52cSDmitry Mastykin ts->keymap[i] = KEY_F1 + (i - 1); 1160492ee52cSDmitry Mastykin 1161492ee52cSDmitry Mastykin input_set_capability(ts->input_dev, EV_KEY, ts->keymap[i]); 1162492ee52cSDmitry Mastykin } 1163fafef982SMarcin Niestroj 1164fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X); 1165fafef982SMarcin Niestroj input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y); 1166fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 1167fafef982SMarcin Niestroj input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 1168fafef982SMarcin Niestroj 1169c7e37cc6SHans de Goede retry_read_config: 1170fafef982SMarcin Niestroj /* Read configuration and apply touchscreen parameters */ 117168caf858SIrina Tirdea goodix_read_config(ts); 117268caf858SIrina Tirdea 1173fafef982SMarcin Niestroj /* Try overriding touchscreen parameters via device properties */ 1174fafef982SMarcin Niestroj touchscreen_parse_properties(ts->input_dev, true, &ts->prop); 1175fafef982SMarcin Niestroj 1176fafef982SMarcin Niestroj if (!ts->prop.max_x || !ts->prop.max_y || !ts->max_touch_num) { 1177c7e37cc6SHans de Goede if (!ts->reset_controller_at_probe && 1178c7e37cc6SHans de Goede ts->irq_pin_access_method != IRQ_PIN_ACCESS_NONE) { 1179c7e37cc6SHans de Goede dev_info(&ts->client->dev, "Config not set, resetting controller\n"); 1180c7e37cc6SHans de Goede /* Retry after a controller reset */ 1181c7e37cc6SHans de Goede ts->reset_controller_at_probe = true; 1182c7e37cc6SHans de Goede error = goodix_reset(ts); 1183c7e37cc6SHans de Goede if (error) 1184c7e37cc6SHans de Goede return error; 1185c7e37cc6SHans de Goede goto retry_read_config; 1186c7e37cc6SHans de Goede } 1187c1c00aa5SGuido Günther dev_err(&ts->client->dev, 1188c1c00aa5SGuido Günther "Invalid config (%d, %d, %d), using defaults\n", 1189c1c00aa5SGuido Günther ts->prop.max_x, ts->prop.max_y, ts->max_touch_num); 1190fafef982SMarcin Niestroj ts->prop.max_x = GOODIX_MAX_WIDTH - 1; 1191fafef982SMarcin Niestroj ts->prop.max_y = GOODIX_MAX_HEIGHT - 1; 1192fafef982SMarcin Niestroj ts->max_touch_num = GOODIX_MAX_CONTACTS; 1193fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 1194fafef982SMarcin Niestroj ABS_MT_POSITION_X, ts->prop.max_x); 1195fafef982SMarcin Niestroj input_abs_set_max(ts->input_dev, 1196fafef982SMarcin Niestroj ABS_MT_POSITION_Y, ts->prop.max_y); 1197fafef982SMarcin Niestroj } 1198fafef982SMarcin Niestroj 1199bd3b8480SYauhen Kharuzhy if (dmi_check_system(nine_bytes_report)) { 1200bd3b8480SYauhen Kharuzhy ts->contact_size = 9; 1201bd3b8480SYauhen Kharuzhy 1202bd3b8480SYauhen Kharuzhy dev_dbg(&ts->client->dev, 1203bd3b8480SYauhen Kharuzhy "Non-standard 9-bytes report format quirk\n"); 1204bd3b8480SYauhen Kharuzhy } 1205bd3b8480SYauhen Kharuzhy 12061dd5ddc1SSergei A. Trusov if (dmi_check_system(inverted_x_screen)) { 12071dd5ddc1SSergei A. Trusov ts->prop.invert_x = true; 12081dd5ddc1SSergei A. Trusov dev_dbg(&ts->client->dev, 12091dd5ddc1SSergei A. Trusov "Applying 'inverted x screen' quirk\n"); 12101dd5ddc1SSergei A. Trusov } 12111dd5ddc1SSergei A. Trusov 1212fafef982SMarcin Niestroj error = input_mt_init_slots(ts->input_dev, ts->max_touch_num, 1213fafef982SMarcin Niestroj INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); 1214fafef982SMarcin Niestroj if (error) { 1215fafef982SMarcin Niestroj dev_err(&ts->client->dev, 1216fafef982SMarcin Niestroj "Failed to initialize MT slots: %d", error); 121768caf858SIrina Tirdea return error; 1218fafef982SMarcin Niestroj } 1219fafef982SMarcin Niestroj 1220fafef982SMarcin Niestroj error = input_register_device(ts->input_dev); 1221fafef982SMarcin Niestroj if (error) { 1222fafef982SMarcin Niestroj dev_err(&ts->client->dev, 1223fafef982SMarcin Niestroj "Failed to register input device: %d", error); 1224fafef982SMarcin Niestroj return error; 1225fafef982SMarcin Niestroj } 122668caf858SIrina Tirdea 122765de58c2SHans de Goede /* 122865de58c2SHans de Goede * Create the input_pen device before goodix_request_irq() calls 122965de58c2SHans de Goede * devm_request_threaded_irq() so that the devm framework frees 123065de58c2SHans de Goede * it after disabling the irq. 123165de58c2SHans de Goede * Unfortunately there is no way to detect if the touchscreen has pen 123265de58c2SHans de Goede * support, so registering the dev is delayed till the first pen event. 123365de58c2SHans de Goede */ 123465de58c2SHans de Goede error = goodix_create_pen_input(ts); 123565de58c2SHans de Goede if (error) 123665de58c2SHans de Goede return error; 123765de58c2SHans de Goede 12385ab09d6aSIrina Tirdea ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT; 12395ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 124068caf858SIrina Tirdea if (error) { 124168caf858SIrina Tirdea dev_err(&ts->client->dev, "request IRQ failed: %d\n", error); 124268caf858SIrina Tirdea return error; 124368caf858SIrina Tirdea } 124468caf858SIrina Tirdea 124568caf858SIrina Tirdea return 0; 124668caf858SIrina Tirdea } 124768caf858SIrina Tirdea 124868caf858SIrina Tirdea /** 124968caf858SIrina Tirdea * goodix_config_cb - Callback to finish device init 125068caf858SIrina Tirdea * 1251cb690465SLee Jones * @cfg: firmware config 1252584da78cSLee Jones * @ctx: our goodix_ts_data pointer 125368caf858SIrina Tirdea * 125468caf858SIrina Tirdea * request_firmware_wait callback that finishes 125568caf858SIrina Tirdea * initialization of the device. 125668caf858SIrina Tirdea */ 125768caf858SIrina Tirdea static void goodix_config_cb(const struct firmware *cfg, void *ctx) 125868caf858SIrina Tirdea { 125968caf858SIrina Tirdea struct goodix_ts_data *ts = ctx; 126068caf858SIrina Tirdea int error; 126168caf858SIrina Tirdea 126209182ed2SHans de Goede if (ts->firmware_name) { 126309182ed2SHans de Goede if (!cfg) 126409182ed2SHans de Goede goto err_release_cfg; 126509182ed2SHans de Goede 126609182ed2SHans de Goede error = goodix_check_cfg(ts, cfg->data, cfg->size); 126709182ed2SHans de Goede if (error) 126809182ed2SHans de Goede goto err_release_cfg; 126909182ed2SHans de Goede 127009182ed2SHans de Goede memcpy(ts->config, cfg->data, cfg->size); 127109182ed2SHans de Goede } else if (cfg) { 127268caf858SIrina Tirdea /* send device configuration to the firmware */ 12731a67448fSHans de Goede error = goodix_send_cfg(ts, cfg->data, cfg->size); 127468caf858SIrina Tirdea if (error) 127568caf858SIrina Tirdea goto err_release_cfg; 127668caf858SIrina Tirdea } 127768caf858SIrina Tirdea 127868caf858SIrina Tirdea goodix_configure_dev(ts); 127968caf858SIrina Tirdea 128068caf858SIrina Tirdea err_release_cfg: 128168caf858SIrina Tirdea release_firmware(cfg); 128268caf858SIrina Tirdea complete_all(&ts->firmware_loading_complete); 128368caf858SIrina Tirdea } 128468caf858SIrina Tirdea 1285ae97fb58SJagan Teki static void goodix_disable_regulators(void *arg) 1286ae97fb58SJagan Teki { 1287ae97fb58SJagan Teki struct goodix_ts_data *ts = arg; 1288ae97fb58SJagan Teki 1289ae97fb58SJagan Teki regulator_disable(ts->vddio); 1290ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1291ae97fb58SJagan Teki } 1292ae97fb58SJagan Teki 12936056d49bSUwe Kleine-König static int goodix_ts_probe(struct i2c_client *client) 1294ca96ea86SBastien Nocera { 1295ca96ea86SBastien Nocera struct goodix_ts_data *ts; 129620e31722SHans de Goede const char *cfg_name; 1297ca96ea86SBastien Nocera int error; 1298ca96ea86SBastien Nocera 1299ca96ea86SBastien Nocera dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr); 1300ca96ea86SBastien Nocera 1301ca96ea86SBastien Nocera if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 1302ca96ea86SBastien Nocera dev_err(&client->dev, "I2C check functionality failed.\n"); 1303ca96ea86SBastien Nocera return -ENXIO; 1304ca96ea86SBastien Nocera } 1305ca96ea86SBastien Nocera 1306ca96ea86SBastien Nocera ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); 1307ca96ea86SBastien Nocera if (!ts) 1308ca96ea86SBastien Nocera return -ENOMEM; 1309ca96ea86SBastien Nocera 1310ca96ea86SBastien Nocera ts->client = client; 1311ca96ea86SBastien Nocera i2c_set_clientdata(client, ts); 131268caf858SIrina Tirdea init_completion(&ts->firmware_loading_complete); 1313bd3b8480SYauhen Kharuzhy ts->contact_size = GOODIX_CONTACT_SIZE; 1314ca96ea86SBastien Nocera 1315ec6e1b40SIrina Tirdea error = goodix_get_gpio_config(ts); 1316ec6e1b40SIrina Tirdea if (error) 1317ec6e1b40SIrina Tirdea return error; 1318ec6e1b40SIrina Tirdea 1319ae97fb58SJagan Teki /* power up the controller */ 1320ae97fb58SJagan Teki error = regulator_enable(ts->avdd28); 1321ae97fb58SJagan Teki if (error) { 1322ae97fb58SJagan Teki dev_err(&client->dev, 1323ae97fb58SJagan Teki "Failed to enable AVDD28 regulator: %d\n", 1324ae97fb58SJagan Teki error); 1325ae97fb58SJagan Teki return error; 1326ae97fb58SJagan Teki } 1327ae97fb58SJagan Teki 1328ae97fb58SJagan Teki error = regulator_enable(ts->vddio); 1329ae97fb58SJagan Teki if (error) { 1330ae97fb58SJagan Teki dev_err(&client->dev, 1331ae97fb58SJagan Teki "Failed to enable VDDIO regulator: %d\n", 1332ae97fb58SJagan Teki error); 1333ae97fb58SJagan Teki regulator_disable(ts->avdd28); 1334ae97fb58SJagan Teki return error; 1335ae97fb58SJagan Teki } 1336ae97fb58SJagan Teki 1337ae97fb58SJagan Teki error = devm_add_action_or_reset(&client->dev, 1338ae97fb58SJagan Teki goodix_disable_regulators, ts); 1339ae97fb58SJagan Teki if (error) 1340ae97fb58SJagan Teki return error; 1341ae97fb58SJagan Teki 13429e1f2d70SHans de Goede reset: 13431921daceSHans de Goede if (ts->reset_controller_at_probe) { 1344ec6e1b40SIrina Tirdea /* reset the controller */ 1345ec6e1b40SIrina Tirdea error = goodix_reset(ts); 1346209bda47SHans de Goede if (error) 1347ec6e1b40SIrina Tirdea return error; 1348ec6e1b40SIrina Tirdea } 1349ec6e1b40SIrina Tirdea 1350ca96ea86SBastien Nocera error = goodix_i2c_test(client); 1351ca96ea86SBastien Nocera if (error) { 13529e1f2d70SHans de Goede if (!ts->reset_controller_at_probe && 13539e1f2d70SHans de Goede ts->irq_pin_access_method != IRQ_PIN_ACCESS_NONE) { 13549e1f2d70SHans de Goede /* Retry after a controller reset */ 13559e1f2d70SHans de Goede ts->reset_controller_at_probe = true; 13569e1f2d70SHans de Goede goto reset; 13579e1f2d70SHans de Goede } 1358ca96ea86SBastien Nocera dev_err(&client->dev, "I2C communication failure: %d\n", error); 1359ca96ea86SBastien Nocera return error; 1360ca96ea86SBastien Nocera } 1361ca96ea86SBastien Nocera 136209182ed2SHans de Goede error = goodix_firmware_check(ts); 136309182ed2SHans de Goede if (error) 136409182ed2SHans de Goede return error; 136509182ed2SHans de Goede 136668caf858SIrina Tirdea error = goodix_read_version(ts); 13677642f29cSHans de Goede if (error) 1368ca96ea86SBastien Nocera return error; 1369ca96ea86SBastien Nocera 137025309004SMarcin Niestroj ts->chip = goodix_get_chip_data(ts->id); 1371a779fbc6SIrina Tirdea 1372e070a97bSHans de Goede if (ts->load_cfg_from_disk) { 137368caf858SIrina Tirdea /* update device config */ 137420e31722SHans de Goede error = device_property_read_string(&client->dev, 137520e31722SHans de Goede "goodix,config-name", 137620e31722SHans de Goede &cfg_name); 137720e31722SHans de Goede if (!error) 137820e31722SHans de Goede snprintf(ts->cfg_name, sizeof(ts->cfg_name), 137920e31722SHans de Goede "goodix/%s", cfg_name); 138020e31722SHans de Goede else 138120e31722SHans de Goede snprintf(ts->cfg_name, sizeof(ts->cfg_name), 1382cae102e2SIcenowy Zheng "goodix_%s_cfg.bin", ts->id); 1383ca96ea86SBastien Nocera 138468caf858SIrina Tirdea error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name, 138568caf858SIrina Tirdea &client->dev, GFP_KERNEL, ts, 138668caf858SIrina Tirdea goodix_config_cb); 1387ca96ea86SBastien Nocera if (error) { 138868caf858SIrina Tirdea dev_err(&client->dev, 138968caf858SIrina Tirdea "Failed to invoke firmware loader: %d\n", 139068caf858SIrina Tirdea error); 1391ca96ea86SBastien Nocera return error; 1392ca96ea86SBastien Nocera } 1393ca96ea86SBastien Nocera 1394ca96ea86SBastien Nocera return 0; 139568caf858SIrina Tirdea } else { 139668caf858SIrina Tirdea error = goodix_configure_dev(ts); 139768caf858SIrina Tirdea if (error) 139868caf858SIrina Tirdea return error; 139968caf858SIrina Tirdea } 140068caf858SIrina Tirdea 140168caf858SIrina Tirdea return 0; 140268caf858SIrina Tirdea } 140368caf858SIrina Tirdea 1404ed5c2f5fSUwe Kleine-König static void goodix_ts_remove(struct i2c_client *client) 140568caf858SIrina Tirdea { 140668caf858SIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 140768caf858SIrina Tirdea 1408e070a97bSHans de Goede if (ts->load_cfg_from_disk) 140968caf858SIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 1410ca96ea86SBastien Nocera } 1411ca96ea86SBastien Nocera 141205ebb78bSJonathan Cameron static int goodix_suspend(struct device *dev) 14135ab09d6aSIrina Tirdea { 14145ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 14155ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 14165ab09d6aSIrina Tirdea int error; 14175ab09d6aSIrina Tirdea 1418e070a97bSHans de Goede if (ts->load_cfg_from_disk) 1419e070a97bSHans de Goede wait_for_completion(&ts->firmware_loading_complete); 1420e070a97bSHans de Goede 14215ab09d6aSIrina Tirdea /* We need gpio pins to suspend/resume */ 142249db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1423faec44b6SHans de Goede disable_irq(client->irq); 14245ab09d6aSIrina Tirdea return 0; 1425faec44b6SHans de Goede } 14265ab09d6aSIrina Tirdea 14275ab09d6aSIrina Tirdea /* Free IRQ as IRQ pin is used as output in the suspend sequence */ 14285ab09d6aSIrina Tirdea goodix_free_irq(ts); 14295ab09d6aSIrina Tirdea 143009182ed2SHans de Goede /* Save reference (calibration) info if necessary */ 143109182ed2SHans de Goede goodix_save_bak_ref(ts); 143209182ed2SHans de Goede 14335ab09d6aSIrina Tirdea /* Output LOW on the INT pin for 5 ms */ 143449db3997SHans de Goede error = goodix_irq_direction_output(ts, 0); 14355ab09d6aSIrina Tirdea if (error) { 14365ab09d6aSIrina Tirdea goodix_request_irq(ts); 14375ab09d6aSIrina Tirdea return error; 14385ab09d6aSIrina Tirdea } 14395ab09d6aSIrina Tirdea 14405ab09d6aSIrina Tirdea usleep_range(5000, 6000); 14415ab09d6aSIrina Tirdea 14425ab09d6aSIrina Tirdea error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND, 14435ab09d6aSIrina Tirdea GOODIX_CMD_SCREEN_OFF); 14445ab09d6aSIrina Tirdea if (error) { 144549db3997SHans de Goede goodix_irq_direction_input(ts); 14465ab09d6aSIrina Tirdea goodix_request_irq(ts); 14475ab09d6aSIrina Tirdea return -EAGAIN; 14485ab09d6aSIrina Tirdea } 14495ab09d6aSIrina Tirdea 14505ab09d6aSIrina Tirdea /* 14515ab09d6aSIrina Tirdea * The datasheet specifies that the interval between sending screen-off 14525ab09d6aSIrina Tirdea * command and wake-up should be longer than 58 ms. To avoid waking up 14535ab09d6aSIrina Tirdea * sooner, delay 58ms here. 14545ab09d6aSIrina Tirdea */ 14555ab09d6aSIrina Tirdea msleep(58); 14565ab09d6aSIrina Tirdea return 0; 14575ab09d6aSIrina Tirdea } 14585ab09d6aSIrina Tirdea 145905ebb78bSJonathan Cameron static int goodix_resume(struct device *dev) 14605ab09d6aSIrina Tirdea { 14615ab09d6aSIrina Tirdea struct i2c_client *client = to_i2c_client(dev); 14625ab09d6aSIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 1463273ec6bdSHans de Goede u8 config_ver; 14645ab09d6aSIrina Tirdea int error; 14655ab09d6aSIrina Tirdea 146649db3997SHans de Goede if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1467faec44b6SHans de Goede enable_irq(client->irq); 14685ab09d6aSIrina Tirdea return 0; 1469faec44b6SHans de Goede } 14705ab09d6aSIrina Tirdea 14715ab09d6aSIrina Tirdea /* 14725ab09d6aSIrina Tirdea * Exit sleep mode by outputting HIGH level to INT pin 14735ab09d6aSIrina Tirdea * for 2ms~5ms. 14745ab09d6aSIrina Tirdea */ 147549db3997SHans de Goede error = goodix_irq_direction_output(ts, 1); 14765ab09d6aSIrina Tirdea if (error) 14775ab09d6aSIrina Tirdea return error; 14785ab09d6aSIrina Tirdea 14795ab09d6aSIrina Tirdea usleep_range(2000, 5000); 14805ab09d6aSIrina Tirdea 14815ab09d6aSIrina Tirdea error = goodix_int_sync(ts); 14825ab09d6aSIrina Tirdea if (error) 14835ab09d6aSIrina Tirdea return error; 14845ab09d6aSIrina Tirdea 1485273ec6bdSHans de Goede error = goodix_i2c_read(ts->client, ts->chip->config_addr, 1486273ec6bdSHans de Goede &config_ver, 1); 14877642f29cSHans de Goede if (!error && config_ver != ts->config[0]) 1488273ec6bdSHans de Goede dev_info(dev, "Config version mismatch %d != %d, resetting controller\n", 1489273ec6bdSHans de Goede config_ver, ts->config[0]); 1490273ec6bdSHans de Goede 1491273ec6bdSHans de Goede if (error != 0 || config_ver != ts->config[0]) { 1492273ec6bdSHans de Goede error = goodix_reset(ts); 1493209bda47SHans de Goede if (error) 1494273ec6bdSHans de Goede return error; 1495273ec6bdSHans de Goede 1496273ec6bdSHans de Goede error = goodix_send_cfg(ts, ts->config, ts->chip->config_len); 1497273ec6bdSHans de Goede if (error) 1498273ec6bdSHans de Goede return error; 1499273ec6bdSHans de Goede } 1500273ec6bdSHans de Goede 15015ab09d6aSIrina Tirdea error = goodix_request_irq(ts); 15025ab09d6aSIrina Tirdea if (error) 15035ab09d6aSIrina Tirdea return error; 15045ab09d6aSIrina Tirdea 15055ab09d6aSIrina Tirdea return 0; 15065ab09d6aSIrina Tirdea } 15075ab09d6aSIrina Tirdea 150805ebb78bSJonathan Cameron static DEFINE_SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume); 15095ab09d6aSIrina Tirdea 1510ca96ea86SBastien Nocera static const struct i2c_device_id goodix_ts_id[] = { 1511ca96ea86SBastien Nocera { "GDIX1001:00", 0 }, 1512ca96ea86SBastien Nocera { } 1513ca96ea86SBastien Nocera }; 15142e9e910eSJavier Martinez Canillas MODULE_DEVICE_TABLE(i2c, goodix_ts_id); 1515ca96ea86SBastien Nocera 1516771d8f1bSAleksei Mamlin #ifdef CONFIG_ACPI 1517ca96ea86SBastien Nocera static const struct acpi_device_id goodix_acpi_match[] = { 1518ca96ea86SBastien Nocera { "GDIX1001", 0 }, 15195ca4d1aeSEthan Lee { "GDIX1002", 0 }, 1520*07b4c950SFelix Engelhardt { "GDX9110", 0 }, 1521ca96ea86SBastien Nocera { } 1522ca96ea86SBastien Nocera }; 1523ca96ea86SBastien Nocera MODULE_DEVICE_TABLE(acpi, goodix_acpi_match); 1524771d8f1bSAleksei Mamlin #endif 1525771d8f1bSAleksei Mamlin 1526771d8f1bSAleksei Mamlin #ifdef CONFIG_OF 1527771d8f1bSAleksei Mamlin static const struct of_device_id goodix_of_match[] = { 152825309004SMarcin Niestroj { .compatible = "goodix,gt1151" }, 152980b9ebd3SJarrah Gosbell { .compatible = "goodix,gt1158" }, 1530a5f50c50SJagan Teki { .compatible = "goodix,gt5663" }, 153184ef1b33SGuido Günther { .compatible = "goodix,gt5688" }, 1532771d8f1bSAleksei Mamlin { .compatible = "goodix,gt911" }, 1533771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9110" }, 1534771d8f1bSAleksei Mamlin { .compatible = "goodix,gt912" }, 1535b9a1c116SYannick Fertre { .compatible = "goodix,gt9147" }, 1536b5e458afSIcenowy Zheng { .compatible = "goodix,gt917s" }, 1537771d8f1bSAleksei Mamlin { .compatible = "goodix,gt927" }, 1538771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9271" }, 1539771d8f1bSAleksei Mamlin { .compatible = "goodix,gt928" }, 15402dce6db7SAngeloGioacchino Del Regno { .compatible = "goodix,gt9286" }, 1541771d8f1bSAleksei Mamlin { .compatible = "goodix,gt967" }, 1542771d8f1bSAleksei Mamlin { } 1543771d8f1bSAleksei Mamlin }; 1544771d8f1bSAleksei Mamlin MODULE_DEVICE_TABLE(of, goodix_of_match); 1545771d8f1bSAleksei Mamlin #endif 1546ca96ea86SBastien Nocera 1547ca96ea86SBastien Nocera static struct i2c_driver goodix_ts_driver = { 1548d8bde56dSUwe Kleine-König .probe = goodix_ts_probe, 154968caf858SIrina Tirdea .remove = goodix_ts_remove, 1550ca96ea86SBastien Nocera .id_table = goodix_ts_id, 1551ca96ea86SBastien Nocera .driver = { 1552ca96ea86SBastien Nocera .name = "Goodix-TS", 1553771d8f1bSAleksei Mamlin .acpi_match_table = ACPI_PTR(goodix_acpi_match), 1554771d8f1bSAleksei Mamlin .of_match_table = of_match_ptr(goodix_of_match), 155505ebb78bSJonathan Cameron .pm = pm_sleep_ptr(&goodix_pm_ops), 1556ca96ea86SBastien Nocera }, 1557ca96ea86SBastien Nocera }; 1558ca96ea86SBastien Nocera module_i2c_driver(goodix_ts_driver); 1559ca96ea86SBastien Nocera 1560ca96ea86SBastien Nocera MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); 1561ca96ea86SBastien Nocera MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>"); 1562ca96ea86SBastien Nocera MODULE_DESCRIPTION("Goodix touchscreen driver"); 1563ca96ea86SBastien Nocera MODULE_LICENSE("GPL v2"); 1564