15b0c03e2SAlistair Francis // SPDX-License-Identifier: GPL-2.0 25b0c03e2SAlistair Francis /* 35b0c03e2SAlistair Francis * Parade TrueTouch(TM) Standard Product V5 Module. 45b0c03e2SAlistair Francis * 55b0c03e2SAlistair Francis * Copyright (C) 2015 Parade Technologies 65b0c03e2SAlistair Francis * Copyright (C) 2012-2015 Cypress Semiconductor 75b0c03e2SAlistair Francis * Copyright (C) 2018 Bootlin 85b0c03e2SAlistair Francis * 95b0c03e2SAlistair Francis * Authors: Mylène Josserand <mylene.josserand@bootlin.com> 105b0c03e2SAlistair Francis * Alistair Francis <alistair@alistair23.me> 115b0c03e2SAlistair Francis */ 125b0c03e2SAlistair Francis 135b0c03e2SAlistair Francis #include <linux/crc-itu-t.h> 145b0c03e2SAlistair Francis #include <linux/delay.h> 155b0c03e2SAlistair Francis #include <linux/device.h> 165b0c03e2SAlistair Francis #include <linux/gpio/consumer.h> 175b0c03e2SAlistair Francis #include <linux/input/mt.h> 185b0c03e2SAlistair Francis #include <linux/input/touchscreen.h> 195b0c03e2SAlistair Francis #include <linux/interrupt.h> 205b0c03e2SAlistair Francis #include <linux/i2c.h> 215b0c03e2SAlistair Francis #include <linux/module.h> 225b0c03e2SAlistair Francis #include <linux/of_device.h> 235b0c03e2SAlistair Francis #include <linux/regmap.h> 245b0c03e2SAlistair Francis #include <asm/unaligned.h> 255b0c03e2SAlistair Francis 265b0c03e2SAlistair Francis #define CYTTSP5_NAME "cyttsp5" 275b0c03e2SAlistair Francis #define CY_I2C_DATA_SIZE (2 * 256) 285b0c03e2SAlistair Francis #define HID_VERSION 0x0100 295b0c03e2SAlistair Francis #define CY_MAX_INPUT 512 305b0c03e2SAlistair Francis #define CYTTSP5_PREALLOCATED_CMD_BUFFER 32 315b0c03e2SAlistair Francis #define CY_BITS_PER_BTN 1 3204249314SRichard Kjerstadius #define CY_NUM_BTN_EVENT_ID GENMASK(CY_BITS_PER_BTN - 1, 0) 335b0c03e2SAlistair Francis 345b0c03e2SAlistair Francis #define MAX_AREA 255 355b0c03e2SAlistair Francis #define HID_OUTPUT_BL_SOP 0x1 365b0c03e2SAlistair Francis #define HID_OUTPUT_BL_EOP 0x17 375b0c03e2SAlistair Francis #define HID_OUTPUT_BL_LAUNCH_APP 0x3B 385b0c03e2SAlistair Francis #define HID_OUTPUT_BL_LAUNCH_APP_SIZE 11 395b0c03e2SAlistair Francis #define HID_OUTPUT_GET_SYSINFO 0x2 405b0c03e2SAlistair Francis #define HID_OUTPUT_GET_SYSINFO_SIZE 5 415b0c03e2SAlistair Francis #define HID_OUTPUT_MAX_CMD_SIZE 12 425b0c03e2SAlistair Francis 435b0c03e2SAlistair Francis #define HID_DESC_REG 0x1 445b0c03e2SAlistair Francis #define HID_INPUT_REG 0x3 455b0c03e2SAlistair Francis #define HID_OUTPUT_REG 0x4 46*3c98b8dbSMaximilian Weigand #define HID_COMMAND_REG 0x5 475b0c03e2SAlistair Francis 485b0c03e2SAlistair Francis #define REPORT_ID_TOUCH 0x1 495b0c03e2SAlistair Francis #define REPORT_ID_BTN 0x3 505b0c03e2SAlistair Francis #define REPORT_SIZE_5 5 515b0c03e2SAlistair Francis #define REPORT_SIZE_8 8 525b0c03e2SAlistair Francis #define REPORT_SIZE_16 16 535b0c03e2SAlistair Francis 545b0c03e2SAlistair Francis /* Touch reports offsets */ 555b0c03e2SAlistair Francis /* Header offsets */ 565b0c03e2SAlistair Francis #define TOUCH_REPORT_DESC_HDR_CONTACTCOUNT 16 575b0c03e2SAlistair Francis /* Record offsets */ 585b0c03e2SAlistair Francis #define TOUCH_REPORT_DESC_CONTACTID 8 595b0c03e2SAlistair Francis #define TOUCH_REPORT_DESC_X 16 605b0c03e2SAlistair Francis #define TOUCH_REPORT_DESC_Y 32 615b0c03e2SAlistair Francis #define TOUCH_REPORT_DESC_P 48 625b0c03e2SAlistair Francis #define TOUCH_REPORT_DESC_MAJ 56 635b0c03e2SAlistair Francis #define TOUCH_REPORT_DESC_MIN 64 645b0c03e2SAlistair Francis 655b0c03e2SAlistair Francis /* HID */ 665b0c03e2SAlistair Francis #define HID_TOUCH_REPORT_ID 0x1 675b0c03e2SAlistair Francis #define HID_BTN_REPORT_ID 0x3 685b0c03e2SAlistair Francis #define HID_APP_RESPONSE_REPORT_ID 0x1F 695b0c03e2SAlistair Francis #define HID_APP_OUTPUT_REPORT_ID 0x2F 705b0c03e2SAlistair Francis #define HID_BL_RESPONSE_REPORT_ID 0x30 715b0c03e2SAlistair Francis #define HID_BL_OUTPUT_REPORT_ID 0x40 72*3c98b8dbSMaximilian Weigand #define HID_RESPONSE_REPORT_ID 0xF0 735b0c03e2SAlistair Francis 745b0c03e2SAlistair Francis #define HID_OUTPUT_RESPONSE_REPORT_OFFSET 2 755b0c03e2SAlistair Francis #define HID_OUTPUT_RESPONSE_CMD_OFFSET 4 765b0c03e2SAlistair Francis #define HID_OUTPUT_RESPONSE_CMD_MASK GENMASK(6, 0) 775b0c03e2SAlistair Francis 785b0c03e2SAlistair Francis #define HID_SYSINFO_SENSING_OFFSET 33 795b0c03e2SAlistair Francis #define HID_SYSINFO_BTN_OFFSET 48 805b0c03e2SAlistair Francis #define HID_SYSINFO_BTN_MASK GENMASK(7, 0) 815b0c03e2SAlistair Francis #define HID_SYSINFO_MAX_BTN 8 825b0c03e2SAlistair Francis 83*3c98b8dbSMaximilian Weigand #define HID_CMD_SET_POWER 0x8 84*3c98b8dbSMaximilian Weigand 85*3c98b8dbSMaximilian Weigand #define HID_POWER_ON 0x0 86*3c98b8dbSMaximilian Weigand #define HID_POWER_SLEEP 0x1 87*3c98b8dbSMaximilian Weigand 885b0c03e2SAlistair Francis #define CY_HID_OUTPUT_TIMEOUT_MS 200 895b0c03e2SAlistair Francis #define CY_HID_OUTPUT_GET_SYSINFO_TIMEOUT_MS 3000 905b0c03e2SAlistair Francis #define CY_HID_GET_HID_DESCRIPTOR_TIMEOUT_MS 4000 91*3c98b8dbSMaximilian Weigand #define CY_HID_SET_POWER_TIMEOUT 500 925b0c03e2SAlistair Francis 935b0c03e2SAlistair Francis /* maximum number of concurrent tracks */ 945b0c03e2SAlistair Francis #define TOUCH_REPORT_SIZE 10 955b0c03e2SAlistair Francis #define TOUCH_INPUT_HEADER_SIZE 7 965b0c03e2SAlistair Francis #define BTN_REPORT_SIZE 9 975b0c03e2SAlistair Francis #define BTN_INPUT_HEADER_SIZE 5 985b0c03e2SAlistair Francis 995b0c03e2SAlistair Francis #define MAX_CY_TCH_T_IDS 32 1005b0c03e2SAlistair Francis 1015b0c03e2SAlistair Francis /* All usage pages for Touch Report */ 1025b0c03e2SAlistair Francis #define TOUCH_REPORT_USAGE_PG_X 0x00010030 1035b0c03e2SAlistair Francis #define TOUCH_REPORT_USAGE_PG_Y 0x00010031 1045b0c03e2SAlistair Francis #define TOUCH_REPORT_USAGE_PG_P 0x000D0030 1055b0c03e2SAlistair Francis #define TOUCH_REPORT_USAGE_PG_CONTACTID 0x000D0051 1065b0c03e2SAlistair Francis #define TOUCH_REPORT_USAGE_PG_CONTACTCOUNT 0x000D0054 1075b0c03e2SAlistair Francis #define TOUCH_REPORT_USAGE_PG_MAJ 0xFF010062 1085b0c03e2SAlistair Francis #define TOUCH_REPORT_USAGE_PG_MIN 0xFF010063 1095b0c03e2SAlistair Francis #define TOUCH_COL_USAGE_PG 0x000D0022 1105b0c03e2SAlistair Francis 111*3c98b8dbSMaximilian Weigand #define SET_CMD_LOW(byte, bits) \ 112*3c98b8dbSMaximilian Weigand ((byte) = (((byte) & 0xF0) | ((bits) & 0x0F))) 113*3c98b8dbSMaximilian Weigand #define SET_CMD_HIGH(byte, bits)\ 114*3c98b8dbSMaximilian Weigand ((byte) = (((byte) & 0x0F) | ((bits) & 0xF0))) 115*3c98b8dbSMaximilian Weigand #define SET_CMD_OPCODE(byte, opcode) SET_CMD_LOW(byte, opcode) 116*3c98b8dbSMaximilian Weigand #define SET_CMD_REPORT_TYPE(byte, type) SET_CMD_HIGH(byte, ((type) << 4)) 117*3c98b8dbSMaximilian Weigand #define SET_CMD_REPORT_ID(byte, id) SET_CMD_LOW(byte, id) 118*3c98b8dbSMaximilian Weigand 1195b0c03e2SAlistair Francis /* System Information interface definitions */ 1205b0c03e2SAlistair Francis struct cyttsp5_sensing_conf_data_dev { 1215b0c03e2SAlistair Francis u8 electrodes_x; 1225b0c03e2SAlistair Francis u8 electrodes_y; 1235b0c03e2SAlistair Francis __le16 len_x; 1245b0c03e2SAlistair Francis __le16 len_y; 1255b0c03e2SAlistair Francis __le16 res_x; 1265b0c03e2SAlistair Francis __le16 res_y; 1275b0c03e2SAlistair Francis __le16 max_z; 1285b0c03e2SAlistair Francis u8 origin_x; 1295b0c03e2SAlistair Francis u8 origin_y; 1305b0c03e2SAlistair Francis u8 btn; 1315b0c03e2SAlistair Francis u8 scan_mode; 1325b0c03e2SAlistair Francis u8 max_num_of_tch_per_refresh_cycle; 1335b0c03e2SAlistair Francis } __packed; 1345b0c03e2SAlistair Francis 1355b0c03e2SAlistair Francis struct cyttsp5_sensing_conf_data { 1365b0c03e2SAlistair Francis u16 res_x; 1375b0c03e2SAlistair Francis u16 res_y; 1385b0c03e2SAlistair Francis u16 max_z; 1395b0c03e2SAlistair Francis u16 len_x; 1405b0c03e2SAlistair Francis u16 len_y; 1415b0c03e2SAlistair Francis u8 origin_x; 1425b0c03e2SAlistair Francis u8 origin_y; 1435b0c03e2SAlistair Francis u8 max_tch; 1445b0c03e2SAlistair Francis }; 1455b0c03e2SAlistair Francis 1465b0c03e2SAlistair Francis enum cyttsp5_tch_abs { /* for ordering within the extracted touch data array */ 1475b0c03e2SAlistair Francis CY_TCH_X, /* X */ 1485b0c03e2SAlistair Francis CY_TCH_Y, /* Y */ 1495b0c03e2SAlistair Francis CY_TCH_P, /* P (Z) */ 1505b0c03e2SAlistair Francis CY_TCH_T, /* TOUCH ID */ 1515b0c03e2SAlistair Francis CY_TCH_MAJ, /* TOUCH_MAJOR */ 1525b0c03e2SAlistair Francis CY_TCH_MIN, /* TOUCH_MINOR */ 1535b0c03e2SAlistair Francis CY_TCH_NUM_ABS 1545b0c03e2SAlistair Francis }; 1555b0c03e2SAlistair Francis 1565b0c03e2SAlistair Francis struct cyttsp5_tch_abs_params { 1575b0c03e2SAlistair Francis size_t ofs; /* abs byte offset */ 1585b0c03e2SAlistair Francis size_t size; /* size in bits */ 1595b0c03e2SAlistair Francis size_t min; /* min value */ 1605b0c03e2SAlistair Francis size_t max; /* max value */ 1615b0c03e2SAlistair Francis size_t bofs; /* bit offset */ 1625b0c03e2SAlistair Francis }; 1635b0c03e2SAlistair Francis 1645b0c03e2SAlistair Francis struct cyttsp5_touch { 1655b0c03e2SAlistair Francis int abs[CY_TCH_NUM_ABS]; 1665b0c03e2SAlistair Francis }; 1675b0c03e2SAlistair Francis 1685b0c03e2SAlistair Francis struct cyttsp5_sysinfo { 1695b0c03e2SAlistair Francis struct cyttsp5_sensing_conf_data sensing_conf_data; 1705b0c03e2SAlistair Francis int num_btns; 1715b0c03e2SAlistair Francis struct cyttsp5_tch_abs_params tch_hdr; 1725b0c03e2SAlistair Francis struct cyttsp5_tch_abs_params tch_abs[CY_TCH_NUM_ABS]; 1735b0c03e2SAlistair Francis u32 key_code[HID_SYSINFO_MAX_BTN]; 1745b0c03e2SAlistair Francis }; 1755b0c03e2SAlistair Francis 1765b0c03e2SAlistair Francis struct cyttsp5_hid_desc { 1775b0c03e2SAlistair Francis __le16 hid_desc_len; 1785b0c03e2SAlistair Francis u8 packet_id; 1795b0c03e2SAlistair Francis u8 reserved_byte; 1805b0c03e2SAlistair Francis __le16 bcd_version; 1815b0c03e2SAlistair Francis __le16 report_desc_len; 1825b0c03e2SAlistair Francis __le16 report_desc_register; 1835b0c03e2SAlistair Francis __le16 input_register; 1845b0c03e2SAlistair Francis __le16 max_input_len; 1855b0c03e2SAlistair Francis __le16 output_register; 1865b0c03e2SAlistair Francis __le16 max_output_len; 1875b0c03e2SAlistair Francis __le16 command_register; 1885b0c03e2SAlistair Francis __le16 data_register; 1895b0c03e2SAlistair Francis __le16 vendor_id; 1905b0c03e2SAlistair Francis __le16 product_id; 1915b0c03e2SAlistair Francis __le16 version_id; 1925b0c03e2SAlistair Francis u8 reserved[4]; 1935b0c03e2SAlistair Francis } __packed; 1945b0c03e2SAlistair Francis 1955b0c03e2SAlistair Francis struct cyttsp5 { 1965b0c03e2SAlistair Francis struct device *dev; 1975b0c03e2SAlistair Francis struct completion cmd_done; 1985b0c03e2SAlistair Francis struct cyttsp5_sysinfo sysinfo; 1995b0c03e2SAlistair Francis struct cyttsp5_hid_desc hid_desc; 2005b0c03e2SAlistair Francis u8 cmd_buf[CYTTSP5_PREALLOCATED_CMD_BUFFER]; 2015b0c03e2SAlistair Francis u8 input_buf[CY_MAX_INPUT]; 2025b0c03e2SAlistair Francis u8 response_buf[CY_MAX_INPUT]; 2035b0c03e2SAlistair Francis struct gpio_desc *reset_gpio; 2045b0c03e2SAlistair Francis struct input_dev *input; 2055b0c03e2SAlistair Francis char phys[NAME_MAX]; 2065b0c03e2SAlistair Francis int num_prv_rec; 2075b0c03e2SAlistair Francis struct regmap *regmap; 2085b0c03e2SAlistair Francis struct touchscreen_properties prop; 2095b0c03e2SAlistair Francis struct regulator *vdd; 2105b0c03e2SAlistair Francis }; 2115b0c03e2SAlistair Francis 2125b0c03e2SAlistair Francis /* 2135b0c03e2SAlistair Francis * For what is understood in the datasheet, the register does not 2145b0c03e2SAlistair Francis * matter. For consistency, use the Input Register address 2155b0c03e2SAlistair Francis * but it does mean anything to the device. The important data 2165b0c03e2SAlistair Francis * to send is the I2C address 2175b0c03e2SAlistair Francis */ 2185b0c03e2SAlistair Francis static int cyttsp5_read(struct cyttsp5 *ts, u8 *buf, u32 max) 2195b0c03e2SAlistair Francis { 2205b0c03e2SAlistair Francis int error; 2215b0c03e2SAlistair Francis u32 size; 2225b0c03e2SAlistair Francis u8 temp[2]; 2235b0c03e2SAlistair Francis 2245b0c03e2SAlistair Francis /* Read the frame to retrieve the size */ 2255b0c03e2SAlistair Francis error = regmap_bulk_read(ts->regmap, HID_INPUT_REG, temp, sizeof(temp)); 2265b0c03e2SAlistair Francis if (error) 2275b0c03e2SAlistair Francis return error; 2285b0c03e2SAlistair Francis 2295b0c03e2SAlistair Francis size = get_unaligned_le16(temp); 2305b0c03e2SAlistair Francis if (!size || size == 2) 2315b0c03e2SAlistair Francis return 0; 2325b0c03e2SAlistair Francis 2335b0c03e2SAlistair Francis if (size > max) 2345b0c03e2SAlistair Francis return -EINVAL; 2355b0c03e2SAlistair Francis 2365b0c03e2SAlistair Francis /* Get the real value */ 2375b0c03e2SAlistair Francis return regmap_bulk_read(ts->regmap, HID_INPUT_REG, buf, size); 2385b0c03e2SAlistair Francis } 2395b0c03e2SAlistair Francis 2405b0c03e2SAlistair Francis static int cyttsp5_write(struct cyttsp5 *ts, unsigned int reg, u8 *data, 2415b0c03e2SAlistair Francis size_t size) 2425b0c03e2SAlistair Francis { 2435b0c03e2SAlistair Francis u8 cmd[HID_OUTPUT_MAX_CMD_SIZE]; 2445b0c03e2SAlistair Francis 2455b0c03e2SAlistair Francis if (size + 1 > HID_OUTPUT_MAX_CMD_SIZE) 2465b0c03e2SAlistair Francis return -E2BIG; 2475b0c03e2SAlistair Francis 2485b0c03e2SAlistair Francis /* High bytes of register address needed as first byte of cmd */ 2495b0c03e2SAlistair Francis cmd[0] = (reg >> 8) & 0xFF; 2505b0c03e2SAlistair Francis 2515b0c03e2SAlistair Francis /* Copy the rest of the data */ 2525b0c03e2SAlistair Francis if (data) 2535b0c03e2SAlistair Francis memcpy(&cmd[1], data, size); 2545b0c03e2SAlistair Francis 2555b0c03e2SAlistair Francis /* 2565b0c03e2SAlistair Francis * The hardware wants to receive a frame with the address register 2575b0c03e2SAlistair Francis * contained in the first two bytes. As the regmap_write function 2585b0c03e2SAlistair Francis * add the register adresse in the frame, we use the low byte as 2595b0c03e2SAlistair Francis * first frame byte for the address register and the first 2605b0c03e2SAlistair Francis * data byte is the high register + left of the cmd to send 2615b0c03e2SAlistair Francis */ 2625b0c03e2SAlistair Francis return regmap_bulk_write(ts->regmap, reg & 0xFF, cmd, size + 1); 2635b0c03e2SAlistair Francis } 2645b0c03e2SAlistair Francis 2655b0c03e2SAlistair Francis static void cyttsp5_get_touch_axis(int *axis, int size, int max, u8 *xy_data, 2665b0c03e2SAlistair Francis int bofs) 2675b0c03e2SAlistair Francis { 2685b0c03e2SAlistair Francis int nbyte; 2695b0c03e2SAlistair Francis 2705b0c03e2SAlistair Francis for (nbyte = 0, *axis = 0; nbyte < size; nbyte++) 2715b0c03e2SAlistair Francis *axis += ((xy_data[nbyte] >> bofs) << (nbyte * 8)); 2725b0c03e2SAlistair Francis 2735b0c03e2SAlistair Francis *axis &= max - 1; 2745b0c03e2SAlistair Francis } 2755b0c03e2SAlistair Francis 2765b0c03e2SAlistair Francis static void cyttsp5_get_touch_record(struct cyttsp5 *ts, 2775b0c03e2SAlistair Francis struct cyttsp5_touch *touch, u8 *xy_data) 2785b0c03e2SAlistair Francis { 2795b0c03e2SAlistair Francis struct cyttsp5_sysinfo *si = &ts->sysinfo; 2805b0c03e2SAlistair Francis enum cyttsp5_tch_abs abs; 2815b0c03e2SAlistair Francis 2825b0c03e2SAlistair Francis for (abs = CY_TCH_X; abs < CY_TCH_NUM_ABS; abs++) 2835b0c03e2SAlistair Francis cyttsp5_get_touch_axis(&touch->abs[abs], 2845b0c03e2SAlistair Francis si->tch_abs[abs].size, 2855b0c03e2SAlistair Francis si->tch_abs[abs].max, 2865b0c03e2SAlistair Francis xy_data + si->tch_abs[abs].ofs, 2875b0c03e2SAlistair Francis si->tch_abs[abs].bofs); 2885b0c03e2SAlistair Francis } 2895b0c03e2SAlistair Francis 2905b0c03e2SAlistair Francis static void cyttsp5_get_mt_touches(struct cyttsp5 *ts, 2915b0c03e2SAlistair Francis struct cyttsp5_touch *tch, int num_cur_tch) 2925b0c03e2SAlistair Francis { 2935b0c03e2SAlistair Francis struct cyttsp5_sysinfo *si = &ts->sysinfo; 2945b0c03e2SAlistair Francis int i, t = 0, offset = 0; 2955b0c03e2SAlistair Francis DECLARE_BITMAP(ids, MAX_CY_TCH_T_IDS); 2965b0c03e2SAlistair Francis u8 *tch_addr; 2975b0c03e2SAlistair Francis int tmp; 2985b0c03e2SAlistair Francis 2995b0c03e2SAlistair Francis bitmap_zero(ids, MAX_CY_TCH_T_IDS); 3005b0c03e2SAlistair Francis memset(tch->abs, 0, sizeof(tch->abs)); 3015b0c03e2SAlistair Francis 3025b0c03e2SAlistair Francis switch (ts->input_buf[2]) { 3035b0c03e2SAlistair Francis case HID_TOUCH_REPORT_ID: 3045b0c03e2SAlistair Francis offset = TOUCH_INPUT_HEADER_SIZE; 3055b0c03e2SAlistair Francis break; 3065b0c03e2SAlistair Francis case HID_BTN_REPORT_ID: 3075b0c03e2SAlistair Francis offset = BTN_INPUT_HEADER_SIZE; 3085b0c03e2SAlistair Francis break; 3095b0c03e2SAlistair Francis } 3105b0c03e2SAlistair Francis 3115b0c03e2SAlistair Francis for (i = 0; i < num_cur_tch; i++) { 3125b0c03e2SAlistair Francis tch_addr = ts->input_buf + offset + (i * TOUCH_REPORT_SIZE); 3135b0c03e2SAlistair Francis cyttsp5_get_touch_record(ts, tch, tch_addr); 3145b0c03e2SAlistair Francis 3155b0c03e2SAlistair Francis /* Convert MAJOR/MINOR from mm to resolution */ 3165b0c03e2SAlistair Francis tmp = tch->abs[CY_TCH_MAJ] * 100 * si->sensing_conf_data.res_x; 3175b0c03e2SAlistair Francis tch->abs[CY_TCH_MAJ] = tmp / si->sensing_conf_data.len_x; 3185b0c03e2SAlistair Francis tmp = tch->abs[CY_TCH_MIN] * 100 * si->sensing_conf_data.res_x; 3195b0c03e2SAlistair Francis tch->abs[CY_TCH_MIN] = tmp / si->sensing_conf_data.len_x; 3205b0c03e2SAlistair Francis 3215b0c03e2SAlistair Francis t = tch->abs[CY_TCH_T]; 3225b0c03e2SAlistair Francis input_mt_slot(ts->input, t); 3235b0c03e2SAlistair Francis input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, true); 3245b0c03e2SAlistair Francis __set_bit(t, ids); 3255b0c03e2SAlistair Francis 3265b0c03e2SAlistair Francis /* position and pressure fields */ 3275b0c03e2SAlistair Francis touchscreen_report_pos(ts->input, &ts->prop, 3285b0c03e2SAlistair Francis tch->abs[CY_TCH_X], tch->abs[CY_TCH_Y], 3295b0c03e2SAlistair Francis true); 3305b0c03e2SAlistair Francis input_report_abs(ts->input, ABS_MT_PRESSURE, 3315b0c03e2SAlistair Francis tch->abs[CY_TCH_P]); 3325b0c03e2SAlistair Francis 3335b0c03e2SAlistair Francis /* Get the extended touch fields */ 3345b0c03e2SAlistair Francis input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, 3355b0c03e2SAlistair Francis tch->abs[CY_TCH_MAJ]); 3365b0c03e2SAlistair Francis input_report_abs(ts->input, ABS_MT_TOUCH_MINOR, 3375b0c03e2SAlistair Francis tch->abs[CY_TCH_MIN]); 3385b0c03e2SAlistair Francis } 3395b0c03e2SAlistair Francis 3405b0c03e2SAlistair Francis ts->num_prv_rec = num_cur_tch; 3415b0c03e2SAlistair Francis } 3425b0c03e2SAlistair Francis 3435b0c03e2SAlistair Francis static int cyttsp5_mt_attention(struct device *dev) 3445b0c03e2SAlistair Francis { 3455b0c03e2SAlistair Francis struct cyttsp5 *ts = dev_get_drvdata(dev); 3465b0c03e2SAlistair Francis struct cyttsp5_sysinfo *si = &ts->sysinfo; 3475b0c03e2SAlistair Francis int max_tch = si->sensing_conf_data.max_tch; 3485b0c03e2SAlistair Francis struct cyttsp5_touch tch; 3495b0c03e2SAlistair Francis int num_cur_tch; 3505b0c03e2SAlistair Francis 3515b0c03e2SAlistair Francis cyttsp5_get_touch_axis(&num_cur_tch, si->tch_hdr.size, 3525b0c03e2SAlistair Francis si->tch_hdr.max, 3535b0c03e2SAlistair Francis ts->input_buf + 3 + si->tch_hdr.ofs, 3545b0c03e2SAlistair Francis si->tch_hdr.bofs); 3555b0c03e2SAlistair Francis 3565b0c03e2SAlistair Francis if (num_cur_tch > max_tch) { 3575b0c03e2SAlistair Francis dev_err(dev, "Num touch err detected (n=%d)\n", num_cur_tch); 3585b0c03e2SAlistair Francis num_cur_tch = max_tch; 3595b0c03e2SAlistair Francis } 3605b0c03e2SAlistair Francis 3615b0c03e2SAlistair Francis if (num_cur_tch == 0 && ts->num_prv_rec == 0) 3625b0c03e2SAlistair Francis return 0; 3635b0c03e2SAlistair Francis 3645b0c03e2SAlistair Francis /* extract xy_data for all currently reported touches */ 3655b0c03e2SAlistair Francis if (num_cur_tch) 3665b0c03e2SAlistair Francis cyttsp5_get_mt_touches(ts, &tch, num_cur_tch); 3675b0c03e2SAlistair Francis 3685b0c03e2SAlistair Francis input_mt_sync_frame(ts->input); 3695b0c03e2SAlistair Francis input_sync(ts->input); 3705b0c03e2SAlistair Francis 3715b0c03e2SAlistair Francis return 0; 3725b0c03e2SAlistair Francis } 3735b0c03e2SAlistair Francis 3745b0c03e2SAlistair Francis static int cyttsp5_setup_input_device(struct device *dev) 3755b0c03e2SAlistair Francis { 3765b0c03e2SAlistair Francis struct cyttsp5 *ts = dev_get_drvdata(dev); 3775b0c03e2SAlistair Francis struct cyttsp5_sysinfo *si = &ts->sysinfo; 3785b0c03e2SAlistair Francis int max_x, max_y, max_p; 3795b0c03e2SAlistair Francis int max_x_tmp, max_y_tmp; 3805b0c03e2SAlistair Francis int error; 3815b0c03e2SAlistair Francis 3825b0c03e2SAlistair Francis max_x_tmp = si->sensing_conf_data.res_x; 3835b0c03e2SAlistair Francis max_y_tmp = si->sensing_conf_data.res_y; 3845b0c03e2SAlistair Francis max_x = max_x_tmp - 1; 3855b0c03e2SAlistair Francis max_y = max_y_tmp - 1; 3865b0c03e2SAlistair Francis max_p = si->sensing_conf_data.max_z; 3875b0c03e2SAlistair Francis 3885b0c03e2SAlistair Francis input_set_abs_params(ts->input, ABS_MT_POSITION_X, 0, max_x, 0, 0); 3895b0c03e2SAlistair Francis input_set_abs_params(ts->input, ABS_MT_POSITION_Y, 0, max_y, 0, 0); 3905b0c03e2SAlistair Francis input_set_abs_params(ts->input, ABS_MT_PRESSURE, 0, max_p, 0, 0); 3915b0c03e2SAlistair Francis 3925b0c03e2SAlistair Francis input_set_abs_params(ts->input, ABS_MT_TOUCH_MAJOR, 0, MAX_AREA, 0, 0); 3935b0c03e2SAlistair Francis input_set_abs_params(ts->input, ABS_MT_TOUCH_MINOR, 0, MAX_AREA, 0, 0); 3945b0c03e2SAlistair Francis 3955b0c03e2SAlistair Francis error = input_mt_init_slots(ts->input, si->tch_abs[CY_TCH_T].max, 3965b0c03e2SAlistair Francis INPUT_MT_DROP_UNUSED | INPUT_MT_DIRECT); 3975b0c03e2SAlistair Francis if (error) 3985b0c03e2SAlistair Francis return error; 3995b0c03e2SAlistair Francis 4005b0c03e2SAlistair Francis error = input_register_device(ts->input); 4015b0c03e2SAlistair Francis if (error) { 4025b0c03e2SAlistair Francis dev_err(dev, "failed to register input device: %d\n", error); 4035b0c03e2SAlistair Francis return error; 4045b0c03e2SAlistair Francis } 4055b0c03e2SAlistair Francis 4065b0c03e2SAlistair Francis return error; 4075b0c03e2SAlistair Francis } 4085b0c03e2SAlistair Francis 4095b0c03e2SAlistair Francis static int cyttsp5_parse_dt_key_code(struct device *dev) 4105b0c03e2SAlistair Francis { 4115b0c03e2SAlistair Francis struct cyttsp5 *ts = dev_get_drvdata(dev); 4125b0c03e2SAlistair Francis struct cyttsp5_sysinfo *si = &ts->sysinfo; 4135b0c03e2SAlistair Francis 4145b0c03e2SAlistair Francis if (!si->num_btns) 4155b0c03e2SAlistair Francis return 0; 4165b0c03e2SAlistair Francis 4175b0c03e2SAlistair Francis /* Initialize the button to RESERVED */ 4185b0c03e2SAlistair Francis memset32(si->key_code, KEY_RESERVED, si->num_btns); 4195b0c03e2SAlistair Francis 4205b0c03e2SAlistair Francis return device_property_read_u32_array(dev, "linux,keycodes", 4215b0c03e2SAlistair Francis si->key_code, si->num_btns); 4225b0c03e2SAlistair Francis } 4235b0c03e2SAlistair Francis 4245b0c03e2SAlistair Francis static int cyttsp5_btn_attention(struct device *dev) 4255b0c03e2SAlistair Francis { 4265b0c03e2SAlistair Francis struct cyttsp5 *ts = dev_get_drvdata(dev); 4275b0c03e2SAlistair Francis struct cyttsp5_sysinfo *si = &ts->sysinfo; 4285b0c03e2SAlistair Francis int cur_btn, offset = 0; 4295b0c03e2SAlistair Francis int cur_btn_state; 4305b0c03e2SAlistair Francis 4315b0c03e2SAlistair Francis switch (ts->input_buf[2]) { 4325b0c03e2SAlistair Francis case HID_TOUCH_REPORT_ID: 4335b0c03e2SAlistair Francis offset = TOUCH_INPUT_HEADER_SIZE; 4345b0c03e2SAlistair Francis break; 4355b0c03e2SAlistair Francis case HID_BTN_REPORT_ID: 4365b0c03e2SAlistair Francis offset = BTN_INPUT_HEADER_SIZE; 4375b0c03e2SAlistair Francis break; 4385b0c03e2SAlistair Francis } 4395b0c03e2SAlistair Francis 4405b0c03e2SAlistair Francis if (ts->input_buf[2] != HID_BTN_REPORT_ID) 4415b0c03e2SAlistair Francis return 0; 4425b0c03e2SAlistair Francis 4435b0c03e2SAlistair Francis /* extract button press/release touch information */ 4445b0c03e2SAlistair Francis for (cur_btn = 0; cur_btn < si->num_btns; cur_btn++) { 4455b0c03e2SAlistair Francis /* Get current button state */ 4465b0c03e2SAlistair Francis cur_btn_state = (ts->input_buf[offset] >> (cur_btn * CY_BITS_PER_BTN)) 4475b0c03e2SAlistair Francis & CY_NUM_BTN_EVENT_ID; 4485b0c03e2SAlistair Francis 4495b0c03e2SAlistair Francis input_report_key(ts->input, si->key_code[cur_btn], 4505b0c03e2SAlistair Francis cur_btn_state); 4515b0c03e2SAlistair Francis input_sync(ts->input); 4525b0c03e2SAlistair Francis } 4535b0c03e2SAlistair Francis 4545b0c03e2SAlistair Francis return 0; 4555b0c03e2SAlistair Francis } 4565b0c03e2SAlistair Francis 4575b0c03e2SAlistair Francis static int cyttsp5_validate_cmd_response(struct cyttsp5 *ts, u8 code) 4585b0c03e2SAlistair Francis { 4595b0c03e2SAlistair Francis u16 size, crc; 4605b0c03e2SAlistair Francis u8 status, report_id; 4615b0c03e2SAlistair Francis int command_code; 4625b0c03e2SAlistair Francis 4635b0c03e2SAlistair Francis size = get_unaligned_le16(&ts->response_buf[0]); 4645b0c03e2SAlistair Francis if (!size) 4655b0c03e2SAlistair Francis return 0; 4665b0c03e2SAlistair Francis 4675b0c03e2SAlistair Francis report_id = ts->response_buf[HID_OUTPUT_RESPONSE_REPORT_OFFSET]; 4685b0c03e2SAlistair Francis 4695b0c03e2SAlistair Francis switch (report_id) { 4705b0c03e2SAlistair Francis case HID_BL_RESPONSE_REPORT_ID: 4715b0c03e2SAlistair Francis if (ts->response_buf[4] != HID_OUTPUT_BL_SOP) { 4725b0c03e2SAlistair Francis dev_err(ts->dev, "HID output response, wrong SOP\n"); 4735b0c03e2SAlistair Francis return -EPROTO; 4745b0c03e2SAlistair Francis } 4755b0c03e2SAlistair Francis 4765b0c03e2SAlistair Francis if (ts->response_buf[size - 1] != HID_OUTPUT_BL_EOP) { 4775b0c03e2SAlistair Francis dev_err(ts->dev, "HID output response, wrong EOP\n"); 4785b0c03e2SAlistair Francis return -EPROTO; 4795b0c03e2SAlistair Francis } 4805b0c03e2SAlistair Francis 4815b0c03e2SAlistair Francis crc = crc_itu_t(0xFFFF, &ts->response_buf[4], size - 7); 4825b0c03e2SAlistair Francis if (get_unaligned_le16(&ts->response_buf[size - 3]) != crc) { 4835b0c03e2SAlistair Francis dev_err(ts->dev, 4845b0c03e2SAlistair Francis "HID output response, wrong CRC 0x%X\n", 4855b0c03e2SAlistair Francis crc); 4865b0c03e2SAlistair Francis return -EPROTO; 4875b0c03e2SAlistair Francis } 4885b0c03e2SAlistair Francis 4895b0c03e2SAlistair Francis status = ts->response_buf[5]; 4905b0c03e2SAlistair Francis if (status) { 4915b0c03e2SAlistair Francis dev_err(ts->dev, "HID output response, ERROR:%d\n", 4925b0c03e2SAlistair Francis status); 4935b0c03e2SAlistair Francis return -EPROTO; 4945b0c03e2SAlistair Francis } 4955b0c03e2SAlistair Francis break; 4965b0c03e2SAlistair Francis 4975b0c03e2SAlistair Francis case HID_APP_RESPONSE_REPORT_ID: 4985b0c03e2SAlistair Francis command_code = ts->response_buf[HID_OUTPUT_RESPONSE_CMD_OFFSET] 4995b0c03e2SAlistair Francis & HID_OUTPUT_RESPONSE_CMD_MASK; 5005b0c03e2SAlistair Francis if (command_code != code) { 5015b0c03e2SAlistair Francis dev_err(ts->dev, 5025b0c03e2SAlistair Francis "HID output response, wrong command_code:%X\n", 5035b0c03e2SAlistair Francis command_code); 5045b0c03e2SAlistair Francis return -EPROTO; 5055b0c03e2SAlistair Francis } 5065b0c03e2SAlistair Francis break; 5075b0c03e2SAlistair Francis } 5085b0c03e2SAlistair Francis 5095b0c03e2SAlistair Francis return 0; 5105b0c03e2SAlistair Francis } 5115b0c03e2SAlistair Francis 5125b0c03e2SAlistair Francis static void cyttsp5_si_get_btn_data(struct cyttsp5 *ts) 5135b0c03e2SAlistair Francis { 5145b0c03e2SAlistair Francis struct cyttsp5_sysinfo *si = &ts->sysinfo; 5155b0c03e2SAlistair Francis unsigned int btns = ts->response_buf[HID_SYSINFO_BTN_OFFSET] & 5165b0c03e2SAlistair Francis HID_SYSINFO_BTN_MASK; 5175b0c03e2SAlistair Francis 5185b0c03e2SAlistair Francis si->num_btns = hweight8(btns); 5195b0c03e2SAlistair Francis } 5205b0c03e2SAlistair Francis 5215b0c03e2SAlistair Francis static int cyttsp5_get_sysinfo_regs(struct cyttsp5 *ts) 5225b0c03e2SAlistair Francis { 5235b0c03e2SAlistair Francis struct cyttsp5_sensing_conf_data *scd = &ts->sysinfo.sensing_conf_data; 5245b0c03e2SAlistair Francis struct cyttsp5_sensing_conf_data_dev *scd_dev = 5255b0c03e2SAlistair Francis (struct cyttsp5_sensing_conf_data_dev *) 5265b0c03e2SAlistair Francis &ts->response_buf[HID_SYSINFO_SENSING_OFFSET]; 5275b0c03e2SAlistair Francis 5285b0c03e2SAlistair Francis cyttsp5_si_get_btn_data(ts); 5295b0c03e2SAlistair Francis 5305b0c03e2SAlistair Francis scd->max_tch = scd_dev->max_num_of_tch_per_refresh_cycle; 5315b0c03e2SAlistair Francis scd->res_x = get_unaligned_le16(&scd_dev->res_x); 5325b0c03e2SAlistair Francis scd->res_y = get_unaligned_le16(&scd_dev->res_y); 5335b0c03e2SAlistair Francis scd->max_z = get_unaligned_le16(&scd_dev->max_z); 5345b0c03e2SAlistair Francis scd->len_x = get_unaligned_le16(&scd_dev->len_x); 5355b0c03e2SAlistair Francis scd->len_y = get_unaligned_le16(&scd_dev->len_y); 5365b0c03e2SAlistair Francis 5375b0c03e2SAlistair Francis return 0; 5385b0c03e2SAlistair Francis } 5395b0c03e2SAlistair Francis 5405b0c03e2SAlistair Francis static int cyttsp5_hid_output_get_sysinfo(struct cyttsp5 *ts) 5415b0c03e2SAlistair Francis { 5425b0c03e2SAlistair Francis int rc; 5435b0c03e2SAlistair Francis u8 cmd[HID_OUTPUT_GET_SYSINFO_SIZE]; 5445b0c03e2SAlistair Francis 5455b0c03e2SAlistair Francis /* HI bytes of Output register address */ 5465b0c03e2SAlistair Francis put_unaligned_le16(HID_OUTPUT_GET_SYSINFO_SIZE, cmd); 5475b0c03e2SAlistair Francis cmd[2] = HID_APP_OUTPUT_REPORT_ID; 5485b0c03e2SAlistair Francis cmd[3] = 0x0; /* Reserved */ 5495b0c03e2SAlistair Francis cmd[4] = HID_OUTPUT_GET_SYSINFO; 5505b0c03e2SAlistair Francis 5515b0c03e2SAlistair Francis rc = cyttsp5_write(ts, HID_OUTPUT_REG, cmd, 5525b0c03e2SAlistair Francis HID_OUTPUT_GET_SYSINFO_SIZE); 5535b0c03e2SAlistair Francis if (rc) { 5545b0c03e2SAlistair Francis dev_err(ts->dev, "Failed to write command %d", rc); 5555b0c03e2SAlistair Francis return rc; 5565b0c03e2SAlistair Francis } 5575b0c03e2SAlistair Francis 5585b0c03e2SAlistair Francis rc = wait_for_completion_interruptible_timeout(&ts->cmd_done, 5595b0c03e2SAlistair Francis msecs_to_jiffies(CY_HID_OUTPUT_GET_SYSINFO_TIMEOUT_MS)); 5605b0c03e2SAlistair Francis if (rc <= 0) { 5615b0c03e2SAlistair Francis dev_err(ts->dev, "HID output cmd execution timed out\n"); 5625b0c03e2SAlistair Francis rc = -ETIMEDOUT; 5635b0c03e2SAlistair Francis return rc; 5645b0c03e2SAlistair Francis } 5655b0c03e2SAlistair Francis 5665b0c03e2SAlistair Francis rc = cyttsp5_validate_cmd_response(ts, HID_OUTPUT_GET_SYSINFO); 5675b0c03e2SAlistair Francis if (rc) { 5685b0c03e2SAlistair Francis dev_err(ts->dev, "Validation of the response failed\n"); 5695b0c03e2SAlistair Francis return rc; 5705b0c03e2SAlistair Francis } 5715b0c03e2SAlistair Francis 5725b0c03e2SAlistair Francis return cyttsp5_get_sysinfo_regs(ts); 5735b0c03e2SAlistair Francis } 5745b0c03e2SAlistair Francis 575*3c98b8dbSMaximilian Weigand static int cyttsp5_power_control(struct cyttsp5 *ts, bool on) 576*3c98b8dbSMaximilian Weigand { 577*3c98b8dbSMaximilian Weigand u8 state = on ? HID_POWER_ON : HID_POWER_SLEEP; 578*3c98b8dbSMaximilian Weigand u8 cmd[2] = { 0 }; 579*3c98b8dbSMaximilian Weigand int rc; 580*3c98b8dbSMaximilian Weigand 581*3c98b8dbSMaximilian Weigand SET_CMD_REPORT_TYPE(cmd[0], 0); 582*3c98b8dbSMaximilian Weigand SET_CMD_REPORT_ID(cmd[0], HID_POWER_SLEEP); 583*3c98b8dbSMaximilian Weigand SET_CMD_OPCODE(cmd[1], HID_CMD_SET_POWER); 584*3c98b8dbSMaximilian Weigand 585*3c98b8dbSMaximilian Weigand rc = cyttsp5_write(ts, HID_COMMAND_REG, cmd, sizeof(cmd)); 586*3c98b8dbSMaximilian Weigand if (rc) { 587*3c98b8dbSMaximilian Weigand dev_err(ts->dev, "Failed to write power command %d", rc); 588*3c98b8dbSMaximilian Weigand return rc; 589*3c98b8dbSMaximilian Weigand } 590*3c98b8dbSMaximilian Weigand 591*3c98b8dbSMaximilian Weigand rc = wait_for_completion_interruptible_timeout(&ts->cmd_done, 592*3c98b8dbSMaximilian Weigand msecs_to_jiffies(CY_HID_SET_POWER_TIMEOUT)); 593*3c98b8dbSMaximilian Weigand if (rc <= 0) { 594*3c98b8dbSMaximilian Weigand dev_err(ts->dev, "HID power cmd execution timed out\n"); 595*3c98b8dbSMaximilian Weigand return -ETIMEDOUT; 596*3c98b8dbSMaximilian Weigand } 597*3c98b8dbSMaximilian Weigand 598*3c98b8dbSMaximilian Weigand if (ts->response_buf[2] != HID_RESPONSE_REPORT_ID || 599*3c98b8dbSMaximilian Weigand (ts->response_buf[3] & 0x03) != state || 600*3c98b8dbSMaximilian Weigand (ts->response_buf[4] & 0x0f) != HID_CMD_SET_POWER) { 601*3c98b8dbSMaximilian Weigand dev_err(ts->dev, "Validation of the %s response failed\n", 602*3c98b8dbSMaximilian Weigand on ? "wakeup" : "sleep"); 603*3c98b8dbSMaximilian Weigand return -EINVAL; 604*3c98b8dbSMaximilian Weigand } 605*3c98b8dbSMaximilian Weigand 606*3c98b8dbSMaximilian Weigand return 0; 607*3c98b8dbSMaximilian Weigand } 608*3c98b8dbSMaximilian Weigand 6095b0c03e2SAlistair Francis static int cyttsp5_hid_output_bl_launch_app(struct cyttsp5 *ts) 6105b0c03e2SAlistair Francis { 6115b0c03e2SAlistair Francis int rc; 6125b0c03e2SAlistair Francis u8 cmd[HID_OUTPUT_BL_LAUNCH_APP]; 6135b0c03e2SAlistair Francis u16 crc; 6145b0c03e2SAlistair Francis 6155b0c03e2SAlistair Francis put_unaligned_le16(HID_OUTPUT_BL_LAUNCH_APP_SIZE, cmd); 6165b0c03e2SAlistair Francis cmd[2] = HID_BL_OUTPUT_REPORT_ID; 6175b0c03e2SAlistair Francis cmd[3] = 0x0; /* Reserved */ 6185b0c03e2SAlistair Francis cmd[4] = HID_OUTPUT_BL_SOP; 6195b0c03e2SAlistair Francis cmd[5] = HID_OUTPUT_BL_LAUNCH_APP; 6205b0c03e2SAlistair Francis put_unaligned_le16(0x00, &cmd[6]); 6215b0c03e2SAlistair Francis crc = crc_itu_t(0xFFFF, &cmd[4], 4); 6225b0c03e2SAlistair Francis put_unaligned_le16(crc, &cmd[8]); 6235b0c03e2SAlistair Francis cmd[10] = HID_OUTPUT_BL_EOP; 6245b0c03e2SAlistair Francis 6255b0c03e2SAlistair Francis rc = cyttsp5_write(ts, HID_OUTPUT_REG, cmd, 6265b0c03e2SAlistair Francis HID_OUTPUT_BL_LAUNCH_APP_SIZE); 6275b0c03e2SAlistair Francis if (rc) { 6285b0c03e2SAlistair Francis dev_err(ts->dev, "Failed to write command %d", rc); 6295b0c03e2SAlistair Francis return rc; 6305b0c03e2SAlistair Francis } 6315b0c03e2SAlistair Francis 6325b0c03e2SAlistair Francis rc = wait_for_completion_interruptible_timeout(&ts->cmd_done, 6335b0c03e2SAlistair Francis msecs_to_jiffies(CY_HID_OUTPUT_TIMEOUT_MS)); 6345b0c03e2SAlistair Francis if (rc <= 0) { 6355b0c03e2SAlistair Francis dev_err(ts->dev, "HID output cmd execution timed out\n"); 6365b0c03e2SAlistair Francis rc = -ETIMEDOUT; 6375b0c03e2SAlistair Francis return rc; 6385b0c03e2SAlistair Francis } 6395b0c03e2SAlistair Francis 6405b0c03e2SAlistair Francis rc = cyttsp5_validate_cmd_response(ts, HID_OUTPUT_BL_LAUNCH_APP); 6415b0c03e2SAlistair Francis if (rc) { 6425b0c03e2SAlistair Francis dev_err(ts->dev, "Validation of the response failed\n"); 6435b0c03e2SAlistair Francis return rc; 6445b0c03e2SAlistair Francis } 6455b0c03e2SAlistair Francis 6465b0c03e2SAlistair Francis return 0; 6475b0c03e2SAlistair Francis } 6485b0c03e2SAlistair Francis 6495b0c03e2SAlistair Francis static int cyttsp5_get_hid_descriptor(struct cyttsp5 *ts, 6505b0c03e2SAlistair Francis struct cyttsp5_hid_desc *desc) 6515b0c03e2SAlistair Francis { 6525b0c03e2SAlistair Francis struct device *dev = ts->dev; 6535b0c03e2SAlistair Francis int rc; 6545b0c03e2SAlistair Francis 6555b0c03e2SAlistair Francis rc = cyttsp5_write(ts, HID_DESC_REG, NULL, 0); 6565b0c03e2SAlistair Francis if (rc) { 6575b0c03e2SAlistair Francis dev_err(dev, "Failed to get HID descriptor, rc=%d\n", rc); 6585b0c03e2SAlistair Francis return rc; 6595b0c03e2SAlistair Francis } 6605b0c03e2SAlistair Francis 6615b0c03e2SAlistair Francis rc = wait_for_completion_interruptible_timeout(&ts->cmd_done, 6625b0c03e2SAlistair Francis msecs_to_jiffies(CY_HID_GET_HID_DESCRIPTOR_TIMEOUT_MS)); 6635b0c03e2SAlistair Francis if (rc <= 0) { 6645b0c03e2SAlistair Francis dev_err(ts->dev, "HID get descriptor timed out\n"); 6655b0c03e2SAlistair Francis rc = -ETIMEDOUT; 6665b0c03e2SAlistair Francis return rc; 6675b0c03e2SAlistair Francis } 6685b0c03e2SAlistair Francis 6695b0c03e2SAlistair Francis memcpy(desc, ts->response_buf, sizeof(*desc)); 6705b0c03e2SAlistair Francis 6715b0c03e2SAlistair Francis /* Check HID descriptor length and version */ 6725b0c03e2SAlistair Francis if (le16_to_cpu(desc->hid_desc_len) != sizeof(*desc) || 6735b0c03e2SAlistair Francis le16_to_cpu(desc->bcd_version) != HID_VERSION) { 6745b0c03e2SAlistair Francis dev_err(dev, "Unsupported HID version\n"); 6755b0c03e2SAlistair Francis return -ENODEV; 6765b0c03e2SAlistair Francis } 6775b0c03e2SAlistair Francis 6785b0c03e2SAlistair Francis return 0; 6795b0c03e2SAlistair Francis } 6805b0c03e2SAlistair Francis 6815b0c03e2SAlistair Francis static int fill_tch_abs(struct cyttsp5_tch_abs_params *tch_abs, int report_size, 6825b0c03e2SAlistair Francis int offset) 6835b0c03e2SAlistair Francis { 6845b0c03e2SAlistair Francis tch_abs->ofs = offset / 8; 6855b0c03e2SAlistair Francis tch_abs->size = report_size / 8; 6865b0c03e2SAlistair Francis if (report_size % 8) 6875b0c03e2SAlistair Francis tch_abs->size += 1; 6885b0c03e2SAlistair Francis tch_abs->min = 0; 6895b0c03e2SAlistair Francis tch_abs->max = 1 << report_size; 6905b0c03e2SAlistair Francis tch_abs->bofs = offset - (tch_abs->ofs << 3); 6915b0c03e2SAlistair Francis 6925b0c03e2SAlistair Francis return 0; 6935b0c03e2SAlistair Francis } 6945b0c03e2SAlistair Francis 6955b0c03e2SAlistair Francis static irqreturn_t cyttsp5_handle_irq(int irq, void *handle) 6965b0c03e2SAlistair Francis { 6975b0c03e2SAlistair Francis struct cyttsp5 *ts = handle; 6985b0c03e2SAlistair Francis int report_id; 6995b0c03e2SAlistair Francis int size; 7005b0c03e2SAlistair Francis int error; 7015b0c03e2SAlistair Francis 7025b0c03e2SAlistair Francis error = cyttsp5_read(ts, ts->input_buf, CY_MAX_INPUT); 7035b0c03e2SAlistair Francis if (error) 7045b0c03e2SAlistair Francis return IRQ_HANDLED; 7055b0c03e2SAlistair Francis 7065b0c03e2SAlistair Francis size = get_unaligned_le16(&ts->input_buf[0]); 7075b0c03e2SAlistair Francis if (size == 0) { 7085b0c03e2SAlistair Francis /* reset */ 7095b0c03e2SAlistair Francis report_id = 0; 7105b0c03e2SAlistair Francis size = 2; 7115b0c03e2SAlistair Francis } else { 7125b0c03e2SAlistair Francis report_id = ts->input_buf[2]; 7135b0c03e2SAlistair Francis } 7145b0c03e2SAlistair Francis 7155b0c03e2SAlistair Francis switch (report_id) { 7165b0c03e2SAlistair Francis case HID_TOUCH_REPORT_ID: 7175b0c03e2SAlistair Francis cyttsp5_mt_attention(ts->dev); 7185b0c03e2SAlistair Francis break; 7195b0c03e2SAlistair Francis case HID_BTN_REPORT_ID: 7205b0c03e2SAlistair Francis cyttsp5_btn_attention(ts->dev); 7215b0c03e2SAlistair Francis break; 722*3c98b8dbSMaximilian Weigand case HID_RESPONSE_REPORT_ID: 723*3c98b8dbSMaximilian Weigand memcpy(ts->response_buf, ts->input_buf, size); 724*3c98b8dbSMaximilian Weigand complete(&ts->cmd_done); 725*3c98b8dbSMaximilian Weigand break; 7265b0c03e2SAlistair Francis default: 7275b0c03e2SAlistair Francis /* It is not an input but a command response */ 7285b0c03e2SAlistair Francis memcpy(ts->response_buf, ts->input_buf, size); 7295b0c03e2SAlistair Francis complete(&ts->cmd_done); 7305b0c03e2SAlistair Francis } 7315b0c03e2SAlistair Francis 7325b0c03e2SAlistair Francis return IRQ_HANDLED; 7335b0c03e2SAlistair Francis } 7345b0c03e2SAlistair Francis 7355b0c03e2SAlistair Francis static int cyttsp5_deassert_int(struct cyttsp5 *ts) 7365b0c03e2SAlistair Francis { 7375b0c03e2SAlistair Francis u16 size; 7385b0c03e2SAlistair Francis u8 buf[2]; 7395b0c03e2SAlistair Francis int error; 7405b0c03e2SAlistair Francis 7415b0c03e2SAlistair Francis error = regmap_bulk_read(ts->regmap, HID_INPUT_REG, buf, sizeof(buf)); 7425b0c03e2SAlistair Francis if (error < 0) 7435b0c03e2SAlistair Francis return error; 7445b0c03e2SAlistair Francis 7455b0c03e2SAlistair Francis size = get_unaligned_le16(&buf[0]); 7465b0c03e2SAlistair Francis if (size == 2 || size == 0) 7475b0c03e2SAlistair Francis return 0; 7485b0c03e2SAlistair Francis 7495b0c03e2SAlistair Francis return -EINVAL; 7505b0c03e2SAlistair Francis } 7515b0c03e2SAlistair Francis 7525b0c03e2SAlistair Francis static int cyttsp5_fill_all_touch(struct cyttsp5 *ts) 7535b0c03e2SAlistair Francis { 7545b0c03e2SAlistair Francis struct cyttsp5_sysinfo *si = &ts->sysinfo; 7555b0c03e2SAlistair Francis 7565b0c03e2SAlistair Francis fill_tch_abs(&si->tch_abs[CY_TCH_X], REPORT_SIZE_16, 7575b0c03e2SAlistair Francis TOUCH_REPORT_DESC_X); 7585b0c03e2SAlistair Francis fill_tch_abs(&si->tch_abs[CY_TCH_Y], REPORT_SIZE_16, 7595b0c03e2SAlistair Francis TOUCH_REPORT_DESC_Y); 7605b0c03e2SAlistair Francis fill_tch_abs(&si->tch_abs[CY_TCH_P], REPORT_SIZE_8, 7615b0c03e2SAlistair Francis TOUCH_REPORT_DESC_P); 7625b0c03e2SAlistair Francis fill_tch_abs(&si->tch_abs[CY_TCH_T], REPORT_SIZE_5, 7635b0c03e2SAlistair Francis TOUCH_REPORT_DESC_CONTACTID); 7645b0c03e2SAlistair Francis fill_tch_abs(&si->tch_hdr, REPORT_SIZE_5, 7655b0c03e2SAlistair Francis TOUCH_REPORT_DESC_HDR_CONTACTCOUNT); 7665b0c03e2SAlistair Francis fill_tch_abs(&si->tch_abs[CY_TCH_MAJ], REPORT_SIZE_8, 7675b0c03e2SAlistair Francis TOUCH_REPORT_DESC_MAJ); 7685b0c03e2SAlistair Francis fill_tch_abs(&si->tch_abs[CY_TCH_MIN], REPORT_SIZE_8, 7695b0c03e2SAlistair Francis TOUCH_REPORT_DESC_MIN); 7705b0c03e2SAlistair Francis 7715b0c03e2SAlistair Francis return 0; 7725b0c03e2SAlistair Francis } 7735b0c03e2SAlistair Francis 7745b0c03e2SAlistair Francis static int cyttsp5_startup(struct cyttsp5 *ts) 7755b0c03e2SAlistair Francis { 7765b0c03e2SAlistair Francis int error; 7775b0c03e2SAlistair Francis 7785b0c03e2SAlistair Francis error = cyttsp5_deassert_int(ts); 7795b0c03e2SAlistair Francis if (error) { 7805b0c03e2SAlistair Francis dev_err(ts->dev, "Error on deassert int r=%d\n", error); 7815b0c03e2SAlistair Francis return -ENODEV; 7825b0c03e2SAlistair Francis } 7835b0c03e2SAlistair Francis 7845b0c03e2SAlistair Francis /* 7855b0c03e2SAlistair Francis * Launch the application as the device starts in bootloader mode 7865b0c03e2SAlistair Francis * because of a power-on-reset 7875b0c03e2SAlistair Francis */ 7885b0c03e2SAlistair Francis error = cyttsp5_hid_output_bl_launch_app(ts); 7895b0c03e2SAlistair Francis if (error < 0) { 7905b0c03e2SAlistair Francis dev_err(ts->dev, "Error on launch app r=%d\n", error); 7915b0c03e2SAlistair Francis return error; 7925b0c03e2SAlistair Francis } 7935b0c03e2SAlistair Francis 7945b0c03e2SAlistair Francis error = cyttsp5_get_hid_descriptor(ts, &ts->hid_desc); 7955b0c03e2SAlistair Francis if (error < 0) { 7965b0c03e2SAlistair Francis dev_err(ts->dev, "Error on getting HID descriptor r=%d\n", error); 7975b0c03e2SAlistair Francis return error; 7985b0c03e2SAlistair Francis } 7995b0c03e2SAlistair Francis 8005b0c03e2SAlistair Francis error = cyttsp5_fill_all_touch(ts); 8015b0c03e2SAlistair Francis if (error < 0) { 8025b0c03e2SAlistair Francis dev_err(ts->dev, "Error on report descriptor r=%d\n", error); 8035b0c03e2SAlistair Francis return error; 8045b0c03e2SAlistair Francis } 8055b0c03e2SAlistair Francis 8065b0c03e2SAlistair Francis error = cyttsp5_hid_output_get_sysinfo(ts); 8075b0c03e2SAlistair Francis if (error) { 8085b0c03e2SAlistair Francis dev_err(ts->dev, "Error on getting sysinfo r=%d\n", error); 8095b0c03e2SAlistair Francis return error; 8105b0c03e2SAlistair Francis } 8115b0c03e2SAlistair Francis 8125b0c03e2SAlistair Francis return error; 8135b0c03e2SAlistair Francis } 8145b0c03e2SAlistair Francis 8155b0c03e2SAlistair Francis static void cyttsp5_cleanup(void *data) 8165b0c03e2SAlistair Francis { 8175b0c03e2SAlistair Francis struct cyttsp5 *ts = data; 8185b0c03e2SAlistair Francis 8195b0c03e2SAlistair Francis regulator_disable(ts->vdd); 8205b0c03e2SAlistair Francis } 8215b0c03e2SAlistair Francis 8225b0c03e2SAlistair Francis static int cyttsp5_probe(struct device *dev, struct regmap *regmap, int irq, 8235b0c03e2SAlistair Francis const char *name) 8245b0c03e2SAlistair Francis { 8255b0c03e2SAlistair Francis struct cyttsp5 *ts; 8265b0c03e2SAlistair Francis struct cyttsp5_sysinfo *si; 8275b0c03e2SAlistair Francis int error, i; 8285b0c03e2SAlistair Francis 8295b0c03e2SAlistair Francis ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL); 8305b0c03e2SAlistair Francis if (!ts) 8315b0c03e2SAlistair Francis return -ENOMEM; 8325b0c03e2SAlistair Francis 8335b0c03e2SAlistair Francis /* Initialize device info */ 8345b0c03e2SAlistair Francis ts->regmap = regmap; 8355b0c03e2SAlistair Francis ts->dev = dev; 8365b0c03e2SAlistair Francis si = &ts->sysinfo; 8375b0c03e2SAlistair Francis dev_set_drvdata(dev, ts); 8385b0c03e2SAlistair Francis 8395b0c03e2SAlistair Francis init_completion(&ts->cmd_done); 8405b0c03e2SAlistair Francis 8415b0c03e2SAlistair Francis /* Power up the device */ 8425b0c03e2SAlistair Francis ts->vdd = devm_regulator_get(dev, "vdd"); 8435b0c03e2SAlistair Francis if (IS_ERR(ts->vdd)) { 8445b0c03e2SAlistair Francis error = PTR_ERR(ts->vdd); 8455b0c03e2SAlistair Francis return error; 8465b0c03e2SAlistair Francis } 8475b0c03e2SAlistair Francis 8485b0c03e2SAlistair Francis error = devm_add_action_or_reset(dev, cyttsp5_cleanup, ts); 8495b0c03e2SAlistair Francis if (error) 8505b0c03e2SAlistair Francis return error; 8515b0c03e2SAlistair Francis 8525b0c03e2SAlistair Francis error = regulator_enable(ts->vdd); 8535b0c03e2SAlistair Francis if (error) 8545b0c03e2SAlistair Francis return error; 8555b0c03e2SAlistair Francis 8565b0c03e2SAlistair Francis ts->input = devm_input_allocate_device(dev); 8575b0c03e2SAlistair Francis if (!ts->input) { 8585b0c03e2SAlistair Francis dev_err(dev, "Error, failed to allocate input device\n"); 8595b0c03e2SAlistair Francis return -ENODEV; 8605b0c03e2SAlistair Francis } 8615b0c03e2SAlistair Francis 8625b0c03e2SAlistair Francis ts->input->name = "cyttsp5"; 8635b0c03e2SAlistair Francis scnprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(dev)); 8645b0c03e2SAlistair Francis ts->input->phys = ts->phys; 8655b0c03e2SAlistair Francis input_set_drvdata(ts->input, ts); 8665b0c03e2SAlistair Francis 8675b0c03e2SAlistair Francis /* Reset the gpio to be in a reset state */ 8685b0c03e2SAlistair Francis ts->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); 8695b0c03e2SAlistair Francis if (IS_ERR(ts->reset_gpio)) { 8705b0c03e2SAlistair Francis error = PTR_ERR(ts->reset_gpio); 8715b0c03e2SAlistair Francis dev_err(dev, "Failed to request reset gpio, error %d\n", error); 8725b0c03e2SAlistair Francis return error; 8735b0c03e2SAlistair Francis } 8745b0c03e2SAlistair Francis gpiod_set_value_cansleep(ts->reset_gpio, 0); 8755b0c03e2SAlistair Francis 8765b0c03e2SAlistair Francis /* Need a delay to have device up */ 8775b0c03e2SAlistair Francis msleep(20); 8785b0c03e2SAlistair Francis 8795b0c03e2SAlistair Francis error = devm_request_threaded_irq(dev, irq, NULL, cyttsp5_handle_irq, 8805b0c03e2SAlistair Francis IRQF_ONESHOT, name, ts); 8815b0c03e2SAlistair Francis if (error) { 8825b0c03e2SAlistair Francis dev_err(dev, "unable to request IRQ\n"); 8835b0c03e2SAlistair Francis return error; 8845b0c03e2SAlistair Francis } 8855b0c03e2SAlistair Francis 8865b0c03e2SAlistair Francis error = cyttsp5_startup(ts); 8875b0c03e2SAlistair Francis if (error) { 8885b0c03e2SAlistair Francis dev_err(ts->dev, "Fail initial startup r=%d\n", error); 8895b0c03e2SAlistair Francis return error; 8905b0c03e2SAlistair Francis } 8915b0c03e2SAlistair Francis 8925b0c03e2SAlistair Francis error = cyttsp5_parse_dt_key_code(dev); 8935b0c03e2SAlistair Francis if (error < 0) { 8945b0c03e2SAlistair Francis dev_err(ts->dev, "Error while parsing dts %d\n", error); 8955b0c03e2SAlistair Francis return error; 8965b0c03e2SAlistair Francis } 8975b0c03e2SAlistair Francis 8985b0c03e2SAlistair Francis touchscreen_parse_properties(ts->input, true, &ts->prop); 8995b0c03e2SAlistair Francis 9005b0c03e2SAlistair Francis __set_bit(EV_KEY, ts->input->evbit); 9015b0c03e2SAlistair Francis for (i = 0; i < si->num_btns; i++) 9025b0c03e2SAlistair Francis __set_bit(si->key_code[i], ts->input->keybit); 9035b0c03e2SAlistair Francis 9045b0c03e2SAlistair Francis return cyttsp5_setup_input_device(dev); 9055b0c03e2SAlistair Francis } 9065b0c03e2SAlistair Francis 907eebf2bf1SUwe Kleine-König static int cyttsp5_i2c_probe(struct i2c_client *client) 9085b0c03e2SAlistair Francis { 9095b0c03e2SAlistair Francis struct regmap *regmap; 9105b0c03e2SAlistair Francis static const struct regmap_config config = { 9115b0c03e2SAlistair Francis .reg_bits = 8, 9125b0c03e2SAlistair Francis .val_bits = 8, 9135b0c03e2SAlistair Francis }; 9145b0c03e2SAlistair Francis 9155b0c03e2SAlistair Francis regmap = devm_regmap_init_i2c(client, &config); 9165b0c03e2SAlistair Francis if (IS_ERR(regmap)) { 9175b0c03e2SAlistair Francis dev_err(&client->dev, "regmap allocation failed: %ld\n", 9185b0c03e2SAlistair Francis PTR_ERR(regmap)); 9195b0c03e2SAlistair Francis return PTR_ERR(regmap); 9205b0c03e2SAlistair Francis } 9215b0c03e2SAlistair Francis 9225b0c03e2SAlistair Francis return cyttsp5_probe(&client->dev, regmap, client->irq, client->name); 9235b0c03e2SAlistair Francis } 9245b0c03e2SAlistair Francis 9255b0c03e2SAlistair Francis static const struct of_device_id cyttsp5_of_match[] = { 9265b0c03e2SAlistair Francis { .compatible = "cypress,tt21000", }, 9275b0c03e2SAlistair Francis { } 9285b0c03e2SAlistair Francis }; 9295b0c03e2SAlistair Francis MODULE_DEVICE_TABLE(of, cyttsp5_of_match); 9305b0c03e2SAlistair Francis 9315b0c03e2SAlistair Francis static const struct i2c_device_id cyttsp5_i2c_id[] = { 9325b0c03e2SAlistair Francis { CYTTSP5_NAME, 0, }, 9335b0c03e2SAlistair Francis { } 9345b0c03e2SAlistair Francis }; 9355b0c03e2SAlistair Francis MODULE_DEVICE_TABLE(i2c, cyttsp5_i2c_id); 9365b0c03e2SAlistair Francis 937*3c98b8dbSMaximilian Weigand static int __maybe_unused cyttsp5_suspend(struct device *dev) 938*3c98b8dbSMaximilian Weigand { 939*3c98b8dbSMaximilian Weigand struct cyttsp5 *ts = dev_get_drvdata(dev); 940*3c98b8dbSMaximilian Weigand 941*3c98b8dbSMaximilian Weigand if (!device_may_wakeup(dev)) 942*3c98b8dbSMaximilian Weigand cyttsp5_power_control(ts, false); 943*3c98b8dbSMaximilian Weigand 944*3c98b8dbSMaximilian Weigand return 0; 945*3c98b8dbSMaximilian Weigand } 946*3c98b8dbSMaximilian Weigand 947*3c98b8dbSMaximilian Weigand static int __maybe_unused cyttsp5_resume(struct device *dev) 948*3c98b8dbSMaximilian Weigand { 949*3c98b8dbSMaximilian Weigand struct cyttsp5 *ts = dev_get_drvdata(dev); 950*3c98b8dbSMaximilian Weigand 951*3c98b8dbSMaximilian Weigand if (!device_may_wakeup(dev)) 952*3c98b8dbSMaximilian Weigand cyttsp5_power_control(ts, true); 953*3c98b8dbSMaximilian Weigand 954*3c98b8dbSMaximilian Weigand return 0; 955*3c98b8dbSMaximilian Weigand } 956*3c98b8dbSMaximilian Weigand 957*3c98b8dbSMaximilian Weigand static SIMPLE_DEV_PM_OPS(cyttsp5_pm, cyttsp5_suspend, cyttsp5_resume); 958*3c98b8dbSMaximilian Weigand 9595b0c03e2SAlistair Francis static struct i2c_driver cyttsp5_i2c_driver = { 9605b0c03e2SAlistair Francis .driver = { 9615b0c03e2SAlistair Francis .name = CYTTSP5_NAME, 9625b0c03e2SAlistair Francis .of_match_table = cyttsp5_of_match, 963*3c98b8dbSMaximilian Weigand .pm = &cyttsp5_pm, 9645b0c03e2SAlistair Francis }, 965eebf2bf1SUwe Kleine-König .probe_new = cyttsp5_i2c_probe, 9665b0c03e2SAlistair Francis .id_table = cyttsp5_i2c_id, 9675b0c03e2SAlistair Francis }; 9685b0c03e2SAlistair Francis module_i2c_driver(cyttsp5_i2c_driver); 9695b0c03e2SAlistair Francis 9705b0c03e2SAlistair Francis MODULE_LICENSE("GPL"); 9715b0c03e2SAlistair Francis MODULE_DESCRIPTION("Touchscreen driver for Cypress TrueTouch Gen 5 Product"); 9725b0c03e2SAlistair Francis MODULE_AUTHOR("Mylène Josserand <mylene.josserand@bootlin.com>"); 973