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 465b0c03e2SAlistair Francis 475b0c03e2SAlistair Francis #define REPORT_ID_TOUCH 0x1 485b0c03e2SAlistair Francis #define REPORT_ID_BTN 0x3 495b0c03e2SAlistair Francis #define REPORT_SIZE_5 5 505b0c03e2SAlistair Francis #define REPORT_SIZE_8 8 515b0c03e2SAlistair Francis #define REPORT_SIZE_16 16 525b0c03e2SAlistair Francis 535b0c03e2SAlistair Francis /* Touch reports offsets */ 545b0c03e2SAlistair Francis /* Header offsets */ 555b0c03e2SAlistair Francis #define TOUCH_REPORT_DESC_HDR_CONTACTCOUNT 16 565b0c03e2SAlistair Francis /* Record offsets */ 575b0c03e2SAlistair Francis #define TOUCH_REPORT_DESC_CONTACTID 8 585b0c03e2SAlistair Francis #define TOUCH_REPORT_DESC_X 16 595b0c03e2SAlistair Francis #define TOUCH_REPORT_DESC_Y 32 605b0c03e2SAlistair Francis #define TOUCH_REPORT_DESC_P 48 615b0c03e2SAlistair Francis #define TOUCH_REPORT_DESC_MAJ 56 625b0c03e2SAlistair Francis #define TOUCH_REPORT_DESC_MIN 64 635b0c03e2SAlistair Francis 645b0c03e2SAlistair Francis /* HID */ 655b0c03e2SAlistair Francis #define HID_TOUCH_REPORT_ID 0x1 665b0c03e2SAlistair Francis #define HID_BTN_REPORT_ID 0x3 675b0c03e2SAlistair Francis #define HID_APP_RESPONSE_REPORT_ID 0x1F 685b0c03e2SAlistair Francis #define HID_APP_OUTPUT_REPORT_ID 0x2F 695b0c03e2SAlistair Francis #define HID_BL_RESPONSE_REPORT_ID 0x30 705b0c03e2SAlistair Francis #define HID_BL_OUTPUT_REPORT_ID 0x40 715b0c03e2SAlistair Francis 725b0c03e2SAlistair Francis #define HID_OUTPUT_RESPONSE_REPORT_OFFSET 2 735b0c03e2SAlistair Francis #define HID_OUTPUT_RESPONSE_CMD_OFFSET 4 745b0c03e2SAlistair Francis #define HID_OUTPUT_RESPONSE_CMD_MASK GENMASK(6, 0) 755b0c03e2SAlistair Francis 765b0c03e2SAlistair Francis #define HID_SYSINFO_SENSING_OFFSET 33 775b0c03e2SAlistair Francis #define HID_SYSINFO_BTN_OFFSET 48 785b0c03e2SAlistair Francis #define HID_SYSINFO_BTN_MASK GENMASK(7, 0) 795b0c03e2SAlistair Francis #define HID_SYSINFO_MAX_BTN 8 805b0c03e2SAlistair Francis 815b0c03e2SAlistair Francis #define CY_HID_OUTPUT_TIMEOUT_MS 200 825b0c03e2SAlistair Francis #define CY_HID_OUTPUT_GET_SYSINFO_TIMEOUT_MS 3000 835b0c03e2SAlistair Francis #define CY_HID_GET_HID_DESCRIPTOR_TIMEOUT_MS 4000 845b0c03e2SAlistair Francis 855b0c03e2SAlistair Francis /* maximum number of concurrent tracks */ 865b0c03e2SAlistair Francis #define TOUCH_REPORT_SIZE 10 875b0c03e2SAlistair Francis #define TOUCH_INPUT_HEADER_SIZE 7 885b0c03e2SAlistair Francis #define BTN_REPORT_SIZE 9 895b0c03e2SAlistair Francis #define BTN_INPUT_HEADER_SIZE 5 905b0c03e2SAlistair Francis 915b0c03e2SAlistair Francis #define MAX_CY_TCH_T_IDS 32 925b0c03e2SAlistair Francis 935b0c03e2SAlistair Francis /* All usage pages for Touch Report */ 945b0c03e2SAlistair Francis #define TOUCH_REPORT_USAGE_PG_X 0x00010030 955b0c03e2SAlistair Francis #define TOUCH_REPORT_USAGE_PG_Y 0x00010031 965b0c03e2SAlistair Francis #define TOUCH_REPORT_USAGE_PG_P 0x000D0030 975b0c03e2SAlistair Francis #define TOUCH_REPORT_USAGE_PG_CONTACTID 0x000D0051 985b0c03e2SAlistair Francis #define TOUCH_REPORT_USAGE_PG_CONTACTCOUNT 0x000D0054 995b0c03e2SAlistair Francis #define TOUCH_REPORT_USAGE_PG_MAJ 0xFF010062 1005b0c03e2SAlistair Francis #define TOUCH_REPORT_USAGE_PG_MIN 0xFF010063 1015b0c03e2SAlistair Francis #define TOUCH_COL_USAGE_PG 0x000D0022 1025b0c03e2SAlistair Francis 1035b0c03e2SAlistair Francis /* System Information interface definitions */ 1045b0c03e2SAlistair Francis struct cyttsp5_sensing_conf_data_dev { 1055b0c03e2SAlistair Francis u8 electrodes_x; 1065b0c03e2SAlistair Francis u8 electrodes_y; 1075b0c03e2SAlistair Francis __le16 len_x; 1085b0c03e2SAlistair Francis __le16 len_y; 1095b0c03e2SAlistair Francis __le16 res_x; 1105b0c03e2SAlistair Francis __le16 res_y; 1115b0c03e2SAlistair Francis __le16 max_z; 1125b0c03e2SAlistair Francis u8 origin_x; 1135b0c03e2SAlistair Francis u8 origin_y; 1145dc63e56Shrdl u8 panel_id; 1155b0c03e2SAlistair Francis u8 btn; 1165b0c03e2SAlistair Francis u8 scan_mode; 1175b0c03e2SAlistair Francis u8 max_num_of_tch_per_refresh_cycle; 1185b0c03e2SAlistair Francis } __packed; 1195b0c03e2SAlistair Francis 1205b0c03e2SAlistair Francis struct cyttsp5_sensing_conf_data { 1215b0c03e2SAlistair Francis u16 res_x; 1225b0c03e2SAlistair Francis u16 res_y; 1235b0c03e2SAlistair Francis u16 max_z; 1245b0c03e2SAlistair Francis u16 len_x; 1255b0c03e2SAlistair Francis u16 len_y; 1265b0c03e2SAlistair Francis u8 origin_x; 1275b0c03e2SAlistair Francis u8 origin_y; 1285b0c03e2SAlistair Francis u8 max_tch; 1295b0c03e2SAlistair Francis }; 1305b0c03e2SAlistair Francis 1315b0c03e2SAlistair Francis enum cyttsp5_tch_abs { /* for ordering within the extracted touch data array */ 1325b0c03e2SAlistair Francis CY_TCH_X, /* X */ 1335b0c03e2SAlistair Francis CY_TCH_Y, /* Y */ 1345b0c03e2SAlistair Francis CY_TCH_P, /* P (Z) */ 1355b0c03e2SAlistair Francis CY_TCH_T, /* TOUCH ID */ 1365b0c03e2SAlistair Francis CY_TCH_MAJ, /* TOUCH_MAJOR */ 1375b0c03e2SAlistair Francis CY_TCH_MIN, /* TOUCH_MINOR */ 1385b0c03e2SAlistair Francis CY_TCH_NUM_ABS 1395b0c03e2SAlistair Francis }; 1405b0c03e2SAlistair Francis 1415b0c03e2SAlistair Francis struct cyttsp5_tch_abs_params { 1425b0c03e2SAlistair Francis size_t ofs; /* abs byte offset */ 1435b0c03e2SAlistair Francis size_t size; /* size in bits */ 1445b0c03e2SAlistair Francis size_t min; /* min value */ 1455b0c03e2SAlistair Francis size_t max; /* max value */ 1465b0c03e2SAlistair Francis size_t bofs; /* bit offset */ 1475b0c03e2SAlistair Francis }; 1485b0c03e2SAlistair Francis 1495b0c03e2SAlistair Francis struct cyttsp5_touch { 1505b0c03e2SAlistair Francis int abs[CY_TCH_NUM_ABS]; 1515b0c03e2SAlistair Francis }; 1525b0c03e2SAlistair Francis 1535b0c03e2SAlistair Francis struct cyttsp5_sysinfo { 1545b0c03e2SAlistair Francis struct cyttsp5_sensing_conf_data sensing_conf_data; 1555b0c03e2SAlistair Francis int num_btns; 1565b0c03e2SAlistair Francis struct cyttsp5_tch_abs_params tch_hdr; 1575b0c03e2SAlistair Francis struct cyttsp5_tch_abs_params tch_abs[CY_TCH_NUM_ABS]; 1585b0c03e2SAlistair Francis u32 key_code[HID_SYSINFO_MAX_BTN]; 1595b0c03e2SAlistair Francis }; 1605b0c03e2SAlistair Francis 1615b0c03e2SAlistair Francis struct cyttsp5_hid_desc { 1625b0c03e2SAlistair Francis __le16 hid_desc_len; 1635b0c03e2SAlistair Francis u8 packet_id; 1645b0c03e2SAlistair Francis u8 reserved_byte; 1655b0c03e2SAlistair Francis __le16 bcd_version; 1665b0c03e2SAlistair Francis __le16 report_desc_len; 1675b0c03e2SAlistair Francis __le16 report_desc_register; 1685b0c03e2SAlistair Francis __le16 input_register; 1695b0c03e2SAlistair Francis __le16 max_input_len; 1705b0c03e2SAlistair Francis __le16 output_register; 1715b0c03e2SAlistair Francis __le16 max_output_len; 1725b0c03e2SAlistair Francis __le16 command_register; 1735b0c03e2SAlistair Francis __le16 data_register; 1745b0c03e2SAlistair Francis __le16 vendor_id; 1755b0c03e2SAlistair Francis __le16 product_id; 1765b0c03e2SAlistair Francis __le16 version_id; 1775b0c03e2SAlistair Francis u8 reserved[4]; 1785b0c03e2SAlistair Francis } __packed; 1795b0c03e2SAlistair Francis 1805b0c03e2SAlistair Francis struct cyttsp5 { 1815b0c03e2SAlistair Francis struct device *dev; 1825b0c03e2SAlistair Francis struct completion cmd_done; 1835b0c03e2SAlistair Francis struct cyttsp5_sysinfo sysinfo; 1845b0c03e2SAlistair Francis struct cyttsp5_hid_desc hid_desc; 1855b0c03e2SAlistair Francis u8 cmd_buf[CYTTSP5_PREALLOCATED_CMD_BUFFER]; 1865b0c03e2SAlistair Francis u8 input_buf[CY_MAX_INPUT]; 1875b0c03e2SAlistair Francis u8 response_buf[CY_MAX_INPUT]; 1885b0c03e2SAlistair Francis struct gpio_desc *reset_gpio; 1895b0c03e2SAlistair Francis struct input_dev *input; 1905b0c03e2SAlistair Francis char phys[NAME_MAX]; 1915b0c03e2SAlistair Francis int num_prv_rec; 1925b0c03e2SAlistair Francis struct regmap *regmap; 1935b0c03e2SAlistair Francis struct touchscreen_properties prop; 1945b0c03e2SAlistair Francis struct regulator *vdd; 1955b0c03e2SAlistair Francis }; 1965b0c03e2SAlistair Francis 1975b0c03e2SAlistair Francis /* 1985b0c03e2SAlistair Francis * For what is understood in the datasheet, the register does not 1995b0c03e2SAlistair Francis * matter. For consistency, use the Input Register address 2005b0c03e2SAlistair Francis * but it does mean anything to the device. The important data 2015b0c03e2SAlistair Francis * to send is the I2C address 2025b0c03e2SAlistair Francis */ 2035b0c03e2SAlistair Francis static int cyttsp5_read(struct cyttsp5 *ts, u8 *buf, u32 max) 2045b0c03e2SAlistair Francis { 2055b0c03e2SAlistair Francis int error; 2065b0c03e2SAlistair Francis u32 size; 2075b0c03e2SAlistair Francis u8 temp[2]; 2085b0c03e2SAlistair Francis 2095b0c03e2SAlistair Francis /* Read the frame to retrieve the size */ 2105b0c03e2SAlistair Francis error = regmap_bulk_read(ts->regmap, HID_INPUT_REG, temp, sizeof(temp)); 2115b0c03e2SAlistair Francis if (error) 2125b0c03e2SAlistair Francis return error; 2135b0c03e2SAlistair Francis 2145b0c03e2SAlistair Francis size = get_unaligned_le16(temp); 2155b0c03e2SAlistair Francis if (!size || size == 2) 2165b0c03e2SAlistair Francis return 0; 2175b0c03e2SAlistair Francis 2185b0c03e2SAlistair Francis if (size > max) 2195b0c03e2SAlistair Francis return -EINVAL; 2205b0c03e2SAlistair Francis 2215b0c03e2SAlistair Francis /* Get the real value */ 2225b0c03e2SAlistair Francis return regmap_bulk_read(ts->regmap, HID_INPUT_REG, buf, size); 2235b0c03e2SAlistair Francis } 2245b0c03e2SAlistair Francis 2255b0c03e2SAlistair Francis static int cyttsp5_write(struct cyttsp5 *ts, unsigned int reg, u8 *data, 2265b0c03e2SAlistair Francis size_t size) 2275b0c03e2SAlistair Francis { 2285b0c03e2SAlistair Francis u8 cmd[HID_OUTPUT_MAX_CMD_SIZE]; 2295b0c03e2SAlistair Francis 2305b0c03e2SAlistair Francis if (size + 1 > HID_OUTPUT_MAX_CMD_SIZE) 2315b0c03e2SAlistair Francis return -E2BIG; 2325b0c03e2SAlistair Francis 2335b0c03e2SAlistair Francis /* High bytes of register address needed as first byte of cmd */ 2345b0c03e2SAlistair Francis cmd[0] = (reg >> 8) & 0xFF; 2355b0c03e2SAlistair Francis 2365b0c03e2SAlistair Francis /* Copy the rest of the data */ 2375b0c03e2SAlistair Francis if (data) 2385b0c03e2SAlistair Francis memcpy(&cmd[1], data, size); 2395b0c03e2SAlistair Francis 2405b0c03e2SAlistair Francis /* 2415b0c03e2SAlistair Francis * The hardware wants to receive a frame with the address register 2425b0c03e2SAlistair Francis * contained in the first two bytes. As the regmap_write function 2435b0c03e2SAlistair Francis * add the register adresse in the frame, we use the low byte as 2445b0c03e2SAlistair Francis * first frame byte for the address register and the first 2455b0c03e2SAlistair Francis * data byte is the high register + left of the cmd to send 2465b0c03e2SAlistair Francis */ 2475b0c03e2SAlistair Francis return regmap_bulk_write(ts->regmap, reg & 0xFF, cmd, size + 1); 2485b0c03e2SAlistair Francis } 2495b0c03e2SAlistair Francis 2505b0c03e2SAlistair Francis static void cyttsp5_get_touch_axis(int *axis, int size, int max, u8 *xy_data, 2515b0c03e2SAlistair Francis int bofs) 2525b0c03e2SAlistair Francis { 2535b0c03e2SAlistair Francis int nbyte; 2545b0c03e2SAlistair Francis 2555b0c03e2SAlistair Francis for (nbyte = 0, *axis = 0; nbyte < size; nbyte++) 2565b0c03e2SAlistair Francis *axis += ((xy_data[nbyte] >> bofs) << (nbyte * 8)); 2575b0c03e2SAlistair Francis 2585b0c03e2SAlistair Francis *axis &= max - 1; 2595b0c03e2SAlistair Francis } 2605b0c03e2SAlistair Francis 2615b0c03e2SAlistair Francis static void cyttsp5_get_touch_record(struct cyttsp5 *ts, 2625b0c03e2SAlistair Francis struct cyttsp5_touch *touch, u8 *xy_data) 2635b0c03e2SAlistair Francis { 2645b0c03e2SAlistair Francis struct cyttsp5_sysinfo *si = &ts->sysinfo; 2655b0c03e2SAlistair Francis enum cyttsp5_tch_abs abs; 2665b0c03e2SAlistair Francis 2675b0c03e2SAlistair Francis for (abs = CY_TCH_X; abs < CY_TCH_NUM_ABS; abs++) 2685b0c03e2SAlistair Francis cyttsp5_get_touch_axis(&touch->abs[abs], 2695b0c03e2SAlistair Francis si->tch_abs[abs].size, 2705b0c03e2SAlistair Francis si->tch_abs[abs].max, 2715b0c03e2SAlistair Francis xy_data + si->tch_abs[abs].ofs, 2725b0c03e2SAlistair Francis si->tch_abs[abs].bofs); 2735b0c03e2SAlistair Francis } 2745b0c03e2SAlistair Francis 2755b0c03e2SAlistair Francis static void cyttsp5_get_mt_touches(struct cyttsp5 *ts, 2765b0c03e2SAlistair Francis struct cyttsp5_touch *tch, int num_cur_tch) 2775b0c03e2SAlistair Francis { 2785b0c03e2SAlistair Francis struct cyttsp5_sysinfo *si = &ts->sysinfo; 2795b0c03e2SAlistair Francis int i, t = 0, offset = 0; 2805b0c03e2SAlistair Francis DECLARE_BITMAP(ids, MAX_CY_TCH_T_IDS); 2815b0c03e2SAlistair Francis u8 *tch_addr; 2825b0c03e2SAlistair Francis int tmp; 2835b0c03e2SAlistair Francis 2845b0c03e2SAlistair Francis bitmap_zero(ids, MAX_CY_TCH_T_IDS); 2855b0c03e2SAlistair Francis memset(tch->abs, 0, sizeof(tch->abs)); 2865b0c03e2SAlistair Francis 2875b0c03e2SAlistair Francis switch (ts->input_buf[2]) { 2885b0c03e2SAlistair Francis case HID_TOUCH_REPORT_ID: 2895b0c03e2SAlistair Francis offset = TOUCH_INPUT_HEADER_SIZE; 2905b0c03e2SAlistair Francis break; 2915b0c03e2SAlistair Francis case HID_BTN_REPORT_ID: 2925b0c03e2SAlistair Francis offset = BTN_INPUT_HEADER_SIZE; 2935b0c03e2SAlistair Francis break; 2945b0c03e2SAlistair Francis } 2955b0c03e2SAlistair Francis 2965b0c03e2SAlistair Francis for (i = 0; i < num_cur_tch; i++) { 2975b0c03e2SAlistair Francis tch_addr = ts->input_buf + offset + (i * TOUCH_REPORT_SIZE); 2985b0c03e2SAlistair Francis cyttsp5_get_touch_record(ts, tch, tch_addr); 2995b0c03e2SAlistair Francis 3005b0c03e2SAlistair Francis /* Convert MAJOR/MINOR from mm to resolution */ 3015b0c03e2SAlistair Francis tmp = tch->abs[CY_TCH_MAJ] * 100 * si->sensing_conf_data.res_x; 3025b0c03e2SAlistair Francis tch->abs[CY_TCH_MAJ] = tmp / si->sensing_conf_data.len_x; 3035b0c03e2SAlistair Francis tmp = tch->abs[CY_TCH_MIN] * 100 * si->sensing_conf_data.res_x; 3045b0c03e2SAlistair Francis tch->abs[CY_TCH_MIN] = tmp / si->sensing_conf_data.len_x; 3055b0c03e2SAlistair Francis 3065b0c03e2SAlistair Francis t = tch->abs[CY_TCH_T]; 3075b0c03e2SAlistair Francis input_mt_slot(ts->input, t); 3085b0c03e2SAlistair Francis input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, true); 3095b0c03e2SAlistair Francis __set_bit(t, ids); 3105b0c03e2SAlistair Francis 3115b0c03e2SAlistair Francis /* position and pressure fields */ 3125b0c03e2SAlistair Francis touchscreen_report_pos(ts->input, &ts->prop, 3135b0c03e2SAlistair Francis tch->abs[CY_TCH_X], tch->abs[CY_TCH_Y], 3145b0c03e2SAlistair Francis true); 3155b0c03e2SAlistair Francis input_report_abs(ts->input, ABS_MT_PRESSURE, 3165b0c03e2SAlistair Francis tch->abs[CY_TCH_P]); 3175b0c03e2SAlistair Francis 3185b0c03e2SAlistair Francis /* Get the extended touch fields */ 3195b0c03e2SAlistair Francis input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, 3205b0c03e2SAlistair Francis tch->abs[CY_TCH_MAJ]); 3215b0c03e2SAlistair Francis input_report_abs(ts->input, ABS_MT_TOUCH_MINOR, 3225b0c03e2SAlistair Francis tch->abs[CY_TCH_MIN]); 3235b0c03e2SAlistair Francis } 3245b0c03e2SAlistair Francis 3255b0c03e2SAlistair Francis ts->num_prv_rec = num_cur_tch; 3265b0c03e2SAlistair Francis } 3275b0c03e2SAlistair Francis 3285b0c03e2SAlistair Francis static int cyttsp5_mt_attention(struct device *dev) 3295b0c03e2SAlistair Francis { 3305b0c03e2SAlistair Francis struct cyttsp5 *ts = dev_get_drvdata(dev); 3315b0c03e2SAlistair Francis struct cyttsp5_sysinfo *si = &ts->sysinfo; 3325b0c03e2SAlistair Francis int max_tch = si->sensing_conf_data.max_tch; 3335b0c03e2SAlistair Francis struct cyttsp5_touch tch; 3345b0c03e2SAlistair Francis int num_cur_tch; 3355b0c03e2SAlistair Francis 3365b0c03e2SAlistair Francis cyttsp5_get_touch_axis(&num_cur_tch, si->tch_hdr.size, 3375b0c03e2SAlistair Francis si->tch_hdr.max, 3385b0c03e2SAlistair Francis ts->input_buf + 3 + si->tch_hdr.ofs, 3395b0c03e2SAlistair Francis si->tch_hdr.bofs); 3405b0c03e2SAlistair Francis 3415b0c03e2SAlistair Francis if (num_cur_tch > max_tch) { 3425b0c03e2SAlistair Francis dev_err(dev, "Num touch err detected (n=%d)\n", num_cur_tch); 3435b0c03e2SAlistair Francis num_cur_tch = max_tch; 3445b0c03e2SAlistair Francis } 3455b0c03e2SAlistair Francis 3465b0c03e2SAlistair Francis if (num_cur_tch == 0 && ts->num_prv_rec == 0) 3475b0c03e2SAlistair Francis return 0; 3485b0c03e2SAlistair Francis 3495b0c03e2SAlistair Francis /* extract xy_data for all currently reported touches */ 3505b0c03e2SAlistair Francis if (num_cur_tch) 3515b0c03e2SAlistair Francis cyttsp5_get_mt_touches(ts, &tch, num_cur_tch); 3525b0c03e2SAlistair Francis 3535b0c03e2SAlistair Francis input_mt_sync_frame(ts->input); 3545b0c03e2SAlistair Francis input_sync(ts->input); 3555b0c03e2SAlistair Francis 3565b0c03e2SAlistair Francis return 0; 3575b0c03e2SAlistair Francis } 3585b0c03e2SAlistair Francis 3595b0c03e2SAlistair Francis static int cyttsp5_setup_input_device(struct device *dev) 3605b0c03e2SAlistair Francis { 3615b0c03e2SAlistair Francis struct cyttsp5 *ts = dev_get_drvdata(dev); 3625b0c03e2SAlistair Francis struct cyttsp5_sysinfo *si = &ts->sysinfo; 3635b0c03e2SAlistair Francis int max_x, max_y, max_p; 3645b0c03e2SAlistair Francis int max_x_tmp, max_y_tmp; 3655b0c03e2SAlistair Francis int error; 3665b0c03e2SAlistair Francis 3675b0c03e2SAlistair Francis max_x_tmp = si->sensing_conf_data.res_x; 3685b0c03e2SAlistair Francis max_y_tmp = si->sensing_conf_data.res_y; 3695b0c03e2SAlistair Francis max_x = max_x_tmp - 1; 3705b0c03e2SAlistair Francis max_y = max_y_tmp - 1; 3715b0c03e2SAlistair Francis max_p = si->sensing_conf_data.max_z; 3725b0c03e2SAlistair Francis 3735b0c03e2SAlistair Francis input_set_abs_params(ts->input, ABS_MT_POSITION_X, 0, max_x, 0, 0); 3745b0c03e2SAlistair Francis input_set_abs_params(ts->input, ABS_MT_POSITION_Y, 0, max_y, 0, 0); 3755b0c03e2SAlistair Francis input_set_abs_params(ts->input, ABS_MT_PRESSURE, 0, max_p, 0, 0); 3765b0c03e2SAlistair Francis 3775b0c03e2SAlistair Francis input_set_abs_params(ts->input, ABS_MT_TOUCH_MAJOR, 0, MAX_AREA, 0, 0); 3785b0c03e2SAlistair Francis input_set_abs_params(ts->input, ABS_MT_TOUCH_MINOR, 0, MAX_AREA, 0, 0); 3795b0c03e2SAlistair Francis 3805b0c03e2SAlistair Francis error = input_mt_init_slots(ts->input, si->tch_abs[CY_TCH_T].max, 3815b0c03e2SAlistair Francis INPUT_MT_DROP_UNUSED | INPUT_MT_DIRECT); 3825b0c03e2SAlistair Francis if (error) 3835b0c03e2SAlistair Francis return error; 3845b0c03e2SAlistair Francis 3855b0c03e2SAlistair Francis error = input_register_device(ts->input); 3865b0c03e2SAlistair Francis if (error) { 3875b0c03e2SAlistair Francis dev_err(dev, "failed to register input device: %d\n", error); 3885b0c03e2SAlistair Francis return error; 3895b0c03e2SAlistair Francis } 3905b0c03e2SAlistair Francis 3915b0c03e2SAlistair Francis return error; 3925b0c03e2SAlistair Francis } 3935b0c03e2SAlistair Francis 3945b0c03e2SAlistair Francis static int cyttsp5_parse_dt_key_code(struct device *dev) 3955b0c03e2SAlistair Francis { 3965b0c03e2SAlistair Francis struct cyttsp5 *ts = dev_get_drvdata(dev); 3975b0c03e2SAlistair Francis struct cyttsp5_sysinfo *si = &ts->sysinfo; 3985b0c03e2SAlistair Francis 3995b0c03e2SAlistair Francis if (!si->num_btns) 4005b0c03e2SAlistair Francis return 0; 4015b0c03e2SAlistair Francis 4025b0c03e2SAlistair Francis /* Initialize the button to RESERVED */ 4035b0c03e2SAlistair Francis memset32(si->key_code, KEY_RESERVED, si->num_btns); 4045b0c03e2SAlistair Francis 4055b0c03e2SAlistair Francis return device_property_read_u32_array(dev, "linux,keycodes", 4065b0c03e2SAlistair Francis si->key_code, si->num_btns); 4075b0c03e2SAlistair Francis } 4085b0c03e2SAlistair Francis 4095b0c03e2SAlistair Francis static int cyttsp5_btn_attention(struct device *dev) 4105b0c03e2SAlistair Francis { 4115b0c03e2SAlistair Francis struct cyttsp5 *ts = dev_get_drvdata(dev); 4125b0c03e2SAlistair Francis struct cyttsp5_sysinfo *si = &ts->sysinfo; 4135b0c03e2SAlistair Francis int cur_btn, offset = 0; 4145b0c03e2SAlistair Francis int cur_btn_state; 4155b0c03e2SAlistair Francis 4165b0c03e2SAlistair Francis switch (ts->input_buf[2]) { 4175b0c03e2SAlistair Francis case HID_TOUCH_REPORT_ID: 4185b0c03e2SAlistair Francis offset = TOUCH_INPUT_HEADER_SIZE; 4195b0c03e2SAlistair Francis break; 4205b0c03e2SAlistair Francis case HID_BTN_REPORT_ID: 4215b0c03e2SAlistair Francis offset = BTN_INPUT_HEADER_SIZE; 4225b0c03e2SAlistair Francis break; 4235b0c03e2SAlistair Francis } 4245b0c03e2SAlistair Francis 4255b0c03e2SAlistair Francis if (ts->input_buf[2] != HID_BTN_REPORT_ID) 4265b0c03e2SAlistair Francis return 0; 4275b0c03e2SAlistair Francis 4285b0c03e2SAlistair Francis /* extract button press/release touch information */ 4295b0c03e2SAlistair Francis for (cur_btn = 0; cur_btn < si->num_btns; cur_btn++) { 4305b0c03e2SAlistair Francis /* Get current button state */ 4315b0c03e2SAlistair Francis cur_btn_state = (ts->input_buf[offset] >> (cur_btn * CY_BITS_PER_BTN)) 4325b0c03e2SAlistair Francis & CY_NUM_BTN_EVENT_ID; 4335b0c03e2SAlistair Francis 4345b0c03e2SAlistair Francis input_report_key(ts->input, si->key_code[cur_btn], 4355b0c03e2SAlistair Francis cur_btn_state); 4365b0c03e2SAlistair Francis input_sync(ts->input); 4375b0c03e2SAlistair Francis } 4385b0c03e2SAlistair Francis 4395b0c03e2SAlistair Francis return 0; 4405b0c03e2SAlistair Francis } 4415b0c03e2SAlistair Francis 4425b0c03e2SAlistair Francis static int cyttsp5_validate_cmd_response(struct cyttsp5 *ts, u8 code) 4435b0c03e2SAlistair Francis { 4445b0c03e2SAlistair Francis u16 size, crc; 4455b0c03e2SAlistair Francis u8 status, report_id; 4465b0c03e2SAlistair Francis int command_code; 4475b0c03e2SAlistair Francis 4485b0c03e2SAlistair Francis size = get_unaligned_le16(&ts->response_buf[0]); 4495b0c03e2SAlistair Francis if (!size) 4505b0c03e2SAlistair Francis return 0; 4515b0c03e2SAlistair Francis 4525b0c03e2SAlistair Francis report_id = ts->response_buf[HID_OUTPUT_RESPONSE_REPORT_OFFSET]; 4535b0c03e2SAlistair Francis 4545b0c03e2SAlistair Francis switch (report_id) { 4555b0c03e2SAlistair Francis case HID_BL_RESPONSE_REPORT_ID: 4565b0c03e2SAlistair Francis if (ts->response_buf[4] != HID_OUTPUT_BL_SOP) { 4575b0c03e2SAlistair Francis dev_err(ts->dev, "HID output response, wrong SOP\n"); 4585b0c03e2SAlistair Francis return -EPROTO; 4595b0c03e2SAlistair Francis } 4605b0c03e2SAlistair Francis 4615b0c03e2SAlistair Francis if (ts->response_buf[size - 1] != HID_OUTPUT_BL_EOP) { 4625b0c03e2SAlistair Francis dev_err(ts->dev, "HID output response, wrong EOP\n"); 4635b0c03e2SAlistair Francis return -EPROTO; 4645b0c03e2SAlistair Francis } 4655b0c03e2SAlistair Francis 4665b0c03e2SAlistair Francis crc = crc_itu_t(0xFFFF, &ts->response_buf[4], size - 7); 4675b0c03e2SAlistair Francis if (get_unaligned_le16(&ts->response_buf[size - 3]) != crc) { 4685b0c03e2SAlistair Francis dev_err(ts->dev, 4695b0c03e2SAlistair Francis "HID output response, wrong CRC 0x%X\n", 4705b0c03e2SAlistair Francis crc); 4715b0c03e2SAlistair Francis return -EPROTO; 4725b0c03e2SAlistair Francis } 4735b0c03e2SAlistair Francis 4745b0c03e2SAlistair Francis status = ts->response_buf[5]; 4755b0c03e2SAlistair Francis if (status) { 4765b0c03e2SAlistair Francis dev_err(ts->dev, "HID output response, ERROR:%d\n", 4775b0c03e2SAlistair Francis status); 4785b0c03e2SAlistair Francis return -EPROTO; 4795b0c03e2SAlistair Francis } 4805b0c03e2SAlistair Francis break; 4815b0c03e2SAlistair Francis 4825b0c03e2SAlistair Francis case HID_APP_RESPONSE_REPORT_ID: 4835b0c03e2SAlistair Francis command_code = ts->response_buf[HID_OUTPUT_RESPONSE_CMD_OFFSET] 4845b0c03e2SAlistair Francis & HID_OUTPUT_RESPONSE_CMD_MASK; 4855b0c03e2SAlistair Francis if (command_code != code) { 4865b0c03e2SAlistair Francis dev_err(ts->dev, 4875b0c03e2SAlistair Francis "HID output response, wrong command_code:%X\n", 4885b0c03e2SAlistair Francis command_code); 4895b0c03e2SAlistair Francis return -EPROTO; 4905b0c03e2SAlistair Francis } 4915b0c03e2SAlistair Francis break; 4925b0c03e2SAlistair Francis } 4935b0c03e2SAlistair Francis 4945b0c03e2SAlistair Francis return 0; 4955b0c03e2SAlistair Francis } 4965b0c03e2SAlistair Francis 4975b0c03e2SAlistair Francis static void cyttsp5_si_get_btn_data(struct cyttsp5 *ts) 4985b0c03e2SAlistair Francis { 4995b0c03e2SAlistair Francis struct cyttsp5_sysinfo *si = &ts->sysinfo; 5005b0c03e2SAlistair Francis unsigned int btns = ts->response_buf[HID_SYSINFO_BTN_OFFSET] & 5015b0c03e2SAlistair Francis HID_SYSINFO_BTN_MASK; 5025b0c03e2SAlistair Francis 5035b0c03e2SAlistair Francis si->num_btns = hweight8(btns); 5045b0c03e2SAlistair Francis } 5055b0c03e2SAlistair Francis 5065b0c03e2SAlistair Francis static int cyttsp5_get_sysinfo_regs(struct cyttsp5 *ts) 5075b0c03e2SAlistair Francis { 5085b0c03e2SAlistair Francis struct cyttsp5_sensing_conf_data *scd = &ts->sysinfo.sensing_conf_data; 5095b0c03e2SAlistair Francis struct cyttsp5_sensing_conf_data_dev *scd_dev = 5105b0c03e2SAlistair Francis (struct cyttsp5_sensing_conf_data_dev *) 5115b0c03e2SAlistair Francis &ts->response_buf[HID_SYSINFO_SENSING_OFFSET]; 5125b0c03e2SAlistair Francis 5135b0c03e2SAlistair Francis cyttsp5_si_get_btn_data(ts); 5145b0c03e2SAlistair Francis 5155b0c03e2SAlistair Francis scd->max_tch = scd_dev->max_num_of_tch_per_refresh_cycle; 5165b0c03e2SAlistair Francis scd->res_x = get_unaligned_le16(&scd_dev->res_x); 5175b0c03e2SAlistair Francis scd->res_y = get_unaligned_le16(&scd_dev->res_y); 5185b0c03e2SAlistair Francis scd->max_z = get_unaligned_le16(&scd_dev->max_z); 5195b0c03e2SAlistair Francis scd->len_x = get_unaligned_le16(&scd_dev->len_x); 5205b0c03e2SAlistair Francis scd->len_y = get_unaligned_le16(&scd_dev->len_y); 5215b0c03e2SAlistair Francis 5225b0c03e2SAlistair Francis return 0; 5235b0c03e2SAlistair Francis } 5245b0c03e2SAlistair Francis 5255b0c03e2SAlistair Francis static int cyttsp5_hid_output_get_sysinfo(struct cyttsp5 *ts) 5265b0c03e2SAlistair Francis { 5275b0c03e2SAlistair Francis int rc; 5285b0c03e2SAlistair Francis u8 cmd[HID_OUTPUT_GET_SYSINFO_SIZE]; 5295b0c03e2SAlistair Francis 5305b0c03e2SAlistair Francis /* HI bytes of Output register address */ 5315b0c03e2SAlistair Francis put_unaligned_le16(HID_OUTPUT_GET_SYSINFO_SIZE, cmd); 5325b0c03e2SAlistair Francis cmd[2] = HID_APP_OUTPUT_REPORT_ID; 5335b0c03e2SAlistair Francis cmd[3] = 0x0; /* Reserved */ 5345b0c03e2SAlistair Francis cmd[4] = HID_OUTPUT_GET_SYSINFO; 5355b0c03e2SAlistair Francis 5365b0c03e2SAlistair Francis rc = cyttsp5_write(ts, HID_OUTPUT_REG, cmd, 5375b0c03e2SAlistair Francis HID_OUTPUT_GET_SYSINFO_SIZE); 5385b0c03e2SAlistair Francis if (rc) { 5395b0c03e2SAlistair Francis dev_err(ts->dev, "Failed to write command %d", rc); 5405b0c03e2SAlistair Francis return rc; 5415b0c03e2SAlistair Francis } 5425b0c03e2SAlistair Francis 5435b0c03e2SAlistair Francis rc = wait_for_completion_interruptible_timeout(&ts->cmd_done, 5445b0c03e2SAlistair Francis msecs_to_jiffies(CY_HID_OUTPUT_GET_SYSINFO_TIMEOUT_MS)); 5455b0c03e2SAlistair Francis if (rc <= 0) { 5465b0c03e2SAlistair Francis dev_err(ts->dev, "HID output cmd execution timed out\n"); 5475b0c03e2SAlistair Francis rc = -ETIMEDOUT; 5485b0c03e2SAlistair Francis return rc; 5495b0c03e2SAlistair Francis } 5505b0c03e2SAlistair Francis 5515b0c03e2SAlistair Francis rc = cyttsp5_validate_cmd_response(ts, HID_OUTPUT_GET_SYSINFO); 5525b0c03e2SAlistair Francis if (rc) { 5535b0c03e2SAlistair Francis dev_err(ts->dev, "Validation of the response failed\n"); 5545b0c03e2SAlistair Francis return rc; 5555b0c03e2SAlistair Francis } 5565b0c03e2SAlistair Francis 5575b0c03e2SAlistair Francis return cyttsp5_get_sysinfo_regs(ts); 5585b0c03e2SAlistair Francis } 5595b0c03e2SAlistair Francis 5605b0c03e2SAlistair Francis static int cyttsp5_hid_output_bl_launch_app(struct cyttsp5 *ts) 5615b0c03e2SAlistair Francis { 5625b0c03e2SAlistair Francis int rc; 563*529de2f1SMaximilian Weigand u8 cmd[HID_OUTPUT_BL_LAUNCH_APP_SIZE]; 5645b0c03e2SAlistair Francis u16 crc; 5655b0c03e2SAlistair Francis 5665b0c03e2SAlistair Francis put_unaligned_le16(HID_OUTPUT_BL_LAUNCH_APP_SIZE, cmd); 5675b0c03e2SAlistair Francis cmd[2] = HID_BL_OUTPUT_REPORT_ID; 5685b0c03e2SAlistair Francis cmd[3] = 0x0; /* Reserved */ 5695b0c03e2SAlistair Francis cmd[4] = HID_OUTPUT_BL_SOP; 5705b0c03e2SAlistair Francis cmd[5] = HID_OUTPUT_BL_LAUNCH_APP; 5715b0c03e2SAlistair Francis put_unaligned_le16(0x00, &cmd[6]); 5725b0c03e2SAlistair Francis crc = crc_itu_t(0xFFFF, &cmd[4], 4); 5735b0c03e2SAlistair Francis put_unaligned_le16(crc, &cmd[8]); 5745b0c03e2SAlistair Francis cmd[10] = HID_OUTPUT_BL_EOP; 5755b0c03e2SAlistair Francis 5765b0c03e2SAlistair Francis rc = cyttsp5_write(ts, HID_OUTPUT_REG, cmd, 5775b0c03e2SAlistair Francis HID_OUTPUT_BL_LAUNCH_APP_SIZE); 5785b0c03e2SAlistair Francis if (rc) { 5795b0c03e2SAlistair Francis dev_err(ts->dev, "Failed to write command %d", rc); 5805b0c03e2SAlistair Francis return rc; 5815b0c03e2SAlistair Francis } 5825b0c03e2SAlistair Francis 5835b0c03e2SAlistair Francis rc = wait_for_completion_interruptible_timeout(&ts->cmd_done, 5845b0c03e2SAlistair Francis msecs_to_jiffies(CY_HID_OUTPUT_TIMEOUT_MS)); 5855b0c03e2SAlistair Francis if (rc <= 0) { 5865b0c03e2SAlistair Francis dev_err(ts->dev, "HID output cmd execution timed out\n"); 5875b0c03e2SAlistair Francis rc = -ETIMEDOUT; 5885b0c03e2SAlistair Francis return rc; 5895b0c03e2SAlistair Francis } 5905b0c03e2SAlistair Francis 5915b0c03e2SAlistair Francis rc = cyttsp5_validate_cmd_response(ts, HID_OUTPUT_BL_LAUNCH_APP); 5925b0c03e2SAlistair Francis if (rc) { 5935b0c03e2SAlistair Francis dev_err(ts->dev, "Validation of the response failed\n"); 5945b0c03e2SAlistair Francis return rc; 5955b0c03e2SAlistair Francis } 5965b0c03e2SAlistair Francis 5975b0c03e2SAlistair Francis return 0; 5985b0c03e2SAlistair Francis } 5995b0c03e2SAlistair Francis 6005b0c03e2SAlistair Francis static int cyttsp5_get_hid_descriptor(struct cyttsp5 *ts, 6015b0c03e2SAlistair Francis struct cyttsp5_hid_desc *desc) 6025b0c03e2SAlistair Francis { 6035b0c03e2SAlistair Francis struct device *dev = ts->dev; 6045b0c03e2SAlistair Francis __le16 hid_desc_register = cpu_to_le16(HID_DESC_REG); 6055b0c03e2SAlistair Francis int rc; 6065b0c03e2SAlistair Francis u8 cmd[2]; 6075b0c03e2SAlistair Francis 6085b0c03e2SAlistair Francis /* Set HID descriptor register */ 6095b0c03e2SAlistair Francis memcpy(cmd, &hid_desc_register, sizeof(hid_desc_register)); 6105b0c03e2SAlistair Francis 6115b0c03e2SAlistair Francis rc = cyttsp5_write(ts, HID_DESC_REG, NULL, 0); 6125b0c03e2SAlistair Francis if (rc) { 6135b0c03e2SAlistair Francis dev_err(dev, "Failed to get HID descriptor, rc=%d\n", rc); 6145b0c03e2SAlistair Francis return rc; 6155b0c03e2SAlistair Francis } 6165b0c03e2SAlistair Francis 6175b0c03e2SAlistair Francis rc = wait_for_completion_interruptible_timeout(&ts->cmd_done, 6185b0c03e2SAlistair Francis msecs_to_jiffies(CY_HID_GET_HID_DESCRIPTOR_TIMEOUT_MS)); 6195b0c03e2SAlistair Francis if (rc <= 0) { 6205b0c03e2SAlistair Francis dev_err(ts->dev, "HID get descriptor timed out\n"); 6215b0c03e2SAlistair Francis rc = -ETIMEDOUT; 6225b0c03e2SAlistair Francis return rc; 6235b0c03e2SAlistair Francis } 6245b0c03e2SAlistair Francis 6255b0c03e2SAlistair Francis memcpy(desc, ts->response_buf, sizeof(*desc)); 6265b0c03e2SAlistair Francis 6275b0c03e2SAlistair Francis /* Check HID descriptor length and version */ 6285b0c03e2SAlistair Francis if (le16_to_cpu(desc->hid_desc_len) != sizeof(*desc) || 6295b0c03e2SAlistair Francis le16_to_cpu(desc->bcd_version) != HID_VERSION) { 6305b0c03e2SAlistair Francis dev_err(dev, "Unsupported HID version\n"); 6315b0c03e2SAlistair Francis return -ENODEV; 6325b0c03e2SAlistair Francis } 6335b0c03e2SAlistair Francis 6345b0c03e2SAlistair Francis return 0; 6355b0c03e2SAlistair Francis } 6365b0c03e2SAlistair Francis 6375b0c03e2SAlistair Francis static int fill_tch_abs(struct cyttsp5_tch_abs_params *tch_abs, int report_size, 6385b0c03e2SAlistair Francis int offset) 6395b0c03e2SAlistair Francis { 6405b0c03e2SAlistair Francis tch_abs->ofs = offset / 8; 6415b0c03e2SAlistair Francis tch_abs->size = report_size / 8; 6425b0c03e2SAlistair Francis if (report_size % 8) 6435b0c03e2SAlistair Francis tch_abs->size += 1; 6445b0c03e2SAlistair Francis tch_abs->min = 0; 6455b0c03e2SAlistair Francis tch_abs->max = 1 << report_size; 6465b0c03e2SAlistair Francis tch_abs->bofs = offset - (tch_abs->ofs << 3); 6475b0c03e2SAlistair Francis 6485b0c03e2SAlistair Francis return 0; 6495b0c03e2SAlistair Francis } 6505b0c03e2SAlistair Francis 6515b0c03e2SAlistair Francis static irqreturn_t cyttsp5_handle_irq(int irq, void *handle) 6525b0c03e2SAlistair Francis { 6535b0c03e2SAlistair Francis struct cyttsp5 *ts = handle; 6545b0c03e2SAlistair Francis int report_id; 6555b0c03e2SAlistair Francis int size; 6565b0c03e2SAlistair Francis int error; 6575b0c03e2SAlistair Francis 6585b0c03e2SAlistair Francis error = cyttsp5_read(ts, ts->input_buf, CY_MAX_INPUT); 6595b0c03e2SAlistair Francis if (error) 6605b0c03e2SAlistair Francis return IRQ_HANDLED; 6615b0c03e2SAlistair Francis 6625b0c03e2SAlistair Francis size = get_unaligned_le16(&ts->input_buf[0]); 6635b0c03e2SAlistair Francis if (size == 0) { 6645b0c03e2SAlistair Francis /* reset */ 6655b0c03e2SAlistair Francis report_id = 0; 6665b0c03e2SAlistair Francis size = 2; 6675b0c03e2SAlistair Francis } else { 6685b0c03e2SAlistair Francis report_id = ts->input_buf[2]; 6695b0c03e2SAlistair Francis } 6705b0c03e2SAlistair Francis 6715b0c03e2SAlistair Francis switch (report_id) { 6725b0c03e2SAlistair Francis case HID_TOUCH_REPORT_ID: 6735b0c03e2SAlistair Francis cyttsp5_mt_attention(ts->dev); 6745b0c03e2SAlistair Francis break; 6755b0c03e2SAlistair Francis case HID_BTN_REPORT_ID: 6765b0c03e2SAlistair Francis cyttsp5_btn_attention(ts->dev); 6775b0c03e2SAlistair Francis break; 6785b0c03e2SAlistair Francis default: 6795b0c03e2SAlistair Francis /* It is not an input but a command response */ 6805b0c03e2SAlistair Francis memcpy(ts->response_buf, ts->input_buf, size); 6815b0c03e2SAlistair Francis complete(&ts->cmd_done); 6825b0c03e2SAlistair Francis } 6835b0c03e2SAlistair Francis 6845b0c03e2SAlistair Francis return IRQ_HANDLED; 6855b0c03e2SAlistair Francis } 6865b0c03e2SAlistair Francis 6875b0c03e2SAlistair Francis static int cyttsp5_deassert_int(struct cyttsp5 *ts) 6885b0c03e2SAlistair Francis { 6895b0c03e2SAlistair Francis u16 size; 6905b0c03e2SAlistair Francis u8 buf[2]; 6915b0c03e2SAlistair Francis int error; 6925b0c03e2SAlistair Francis 6935b0c03e2SAlistair Francis error = regmap_bulk_read(ts->regmap, HID_INPUT_REG, buf, sizeof(buf)); 6945b0c03e2SAlistair Francis if (error < 0) 6955b0c03e2SAlistair Francis return error; 6965b0c03e2SAlistair Francis 6975b0c03e2SAlistair Francis size = get_unaligned_le16(&buf[0]); 6985b0c03e2SAlistair Francis if (size == 2 || size == 0) 6995b0c03e2SAlistair Francis return 0; 7005b0c03e2SAlistair Francis 7015b0c03e2SAlistair Francis return -EINVAL; 7025b0c03e2SAlistair Francis } 7035b0c03e2SAlistair Francis 7045b0c03e2SAlistair Francis static int cyttsp5_fill_all_touch(struct cyttsp5 *ts) 7055b0c03e2SAlistair Francis { 7065b0c03e2SAlistair Francis struct cyttsp5_sysinfo *si = &ts->sysinfo; 7075b0c03e2SAlistair Francis 7085b0c03e2SAlistair Francis fill_tch_abs(&si->tch_abs[CY_TCH_X], REPORT_SIZE_16, 7095b0c03e2SAlistair Francis TOUCH_REPORT_DESC_X); 7105b0c03e2SAlistair Francis fill_tch_abs(&si->tch_abs[CY_TCH_Y], REPORT_SIZE_16, 7115b0c03e2SAlistair Francis TOUCH_REPORT_DESC_Y); 7125b0c03e2SAlistair Francis fill_tch_abs(&si->tch_abs[CY_TCH_P], REPORT_SIZE_8, 7135b0c03e2SAlistair Francis TOUCH_REPORT_DESC_P); 7145b0c03e2SAlistair Francis fill_tch_abs(&si->tch_abs[CY_TCH_T], REPORT_SIZE_5, 7155b0c03e2SAlistair Francis TOUCH_REPORT_DESC_CONTACTID); 7165b0c03e2SAlistair Francis fill_tch_abs(&si->tch_hdr, REPORT_SIZE_5, 7175b0c03e2SAlistair Francis TOUCH_REPORT_DESC_HDR_CONTACTCOUNT); 7185b0c03e2SAlistair Francis fill_tch_abs(&si->tch_abs[CY_TCH_MAJ], REPORT_SIZE_8, 7195b0c03e2SAlistair Francis TOUCH_REPORT_DESC_MAJ); 7205b0c03e2SAlistair Francis fill_tch_abs(&si->tch_abs[CY_TCH_MIN], REPORT_SIZE_8, 7215b0c03e2SAlistair Francis TOUCH_REPORT_DESC_MIN); 7225b0c03e2SAlistair Francis 7235b0c03e2SAlistair Francis return 0; 7245b0c03e2SAlistair Francis } 7255b0c03e2SAlistair Francis 7265b0c03e2SAlistair Francis static int cyttsp5_startup(struct cyttsp5 *ts) 7275b0c03e2SAlistair Francis { 7285b0c03e2SAlistair Francis int error; 7295b0c03e2SAlistair Francis 7305b0c03e2SAlistair Francis error = cyttsp5_deassert_int(ts); 7315b0c03e2SAlistair Francis if (error) { 7325b0c03e2SAlistair Francis dev_err(ts->dev, "Error on deassert int r=%d\n", error); 7335b0c03e2SAlistair Francis return -ENODEV; 7345b0c03e2SAlistair Francis } 7355b0c03e2SAlistair Francis 7365b0c03e2SAlistair Francis /* 7375b0c03e2SAlistair Francis * Launch the application as the device starts in bootloader mode 7385b0c03e2SAlistair Francis * because of a power-on-reset 7395b0c03e2SAlistair Francis */ 7405b0c03e2SAlistair Francis error = cyttsp5_hid_output_bl_launch_app(ts); 7415b0c03e2SAlistair Francis if (error < 0) { 7425b0c03e2SAlistair Francis dev_err(ts->dev, "Error on launch app r=%d\n", error); 7435b0c03e2SAlistair Francis return error; 7445b0c03e2SAlistair Francis } 7455b0c03e2SAlistair Francis 7465b0c03e2SAlistair Francis error = cyttsp5_get_hid_descriptor(ts, &ts->hid_desc); 7475b0c03e2SAlistair Francis if (error < 0) { 7485b0c03e2SAlistair Francis dev_err(ts->dev, "Error on getting HID descriptor r=%d\n", error); 7495b0c03e2SAlistair Francis return error; 7505b0c03e2SAlistair Francis } 7515b0c03e2SAlistair Francis 7525b0c03e2SAlistair Francis error = cyttsp5_fill_all_touch(ts); 7535b0c03e2SAlistair Francis if (error < 0) { 7545b0c03e2SAlistair Francis dev_err(ts->dev, "Error on report descriptor r=%d\n", error); 7555b0c03e2SAlistair Francis return error; 7565b0c03e2SAlistair Francis } 7575b0c03e2SAlistair Francis 7585b0c03e2SAlistair Francis error = cyttsp5_hid_output_get_sysinfo(ts); 7595b0c03e2SAlistair Francis if (error) { 7605b0c03e2SAlistair Francis dev_err(ts->dev, "Error on getting sysinfo r=%d\n", error); 7615b0c03e2SAlistair Francis return error; 7625b0c03e2SAlistair Francis } 7635b0c03e2SAlistair Francis 7645b0c03e2SAlistair Francis return error; 7655b0c03e2SAlistair Francis } 7665b0c03e2SAlistair Francis 7675b0c03e2SAlistair Francis static void cyttsp5_cleanup(void *data) 7685b0c03e2SAlistair Francis { 7695b0c03e2SAlistair Francis struct cyttsp5 *ts = data; 7705b0c03e2SAlistair Francis 7715b0c03e2SAlistair Francis regulator_disable(ts->vdd); 7725b0c03e2SAlistair Francis } 7735b0c03e2SAlistair Francis 7745b0c03e2SAlistair Francis static int cyttsp5_probe(struct device *dev, struct regmap *regmap, int irq, 7755b0c03e2SAlistair Francis const char *name) 7765b0c03e2SAlistair Francis { 7775b0c03e2SAlistair Francis struct cyttsp5 *ts; 7785b0c03e2SAlistair Francis struct cyttsp5_sysinfo *si; 7795b0c03e2SAlistair Francis int error, i; 7805b0c03e2SAlistair Francis 7815b0c03e2SAlistair Francis ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL); 7825b0c03e2SAlistair Francis if (!ts) 7835b0c03e2SAlistair Francis return -ENOMEM; 7845b0c03e2SAlistair Francis 7855b0c03e2SAlistair Francis /* Initialize device info */ 7865b0c03e2SAlistair Francis ts->regmap = regmap; 7875b0c03e2SAlistair Francis ts->dev = dev; 7885b0c03e2SAlistair Francis si = &ts->sysinfo; 7895b0c03e2SAlistair Francis dev_set_drvdata(dev, ts); 7905b0c03e2SAlistair Francis 7915b0c03e2SAlistair Francis init_completion(&ts->cmd_done); 7925b0c03e2SAlistair Francis 7935b0c03e2SAlistair Francis /* Power up the device */ 7945b0c03e2SAlistair Francis ts->vdd = devm_regulator_get(dev, "vdd"); 7955b0c03e2SAlistair Francis if (IS_ERR(ts->vdd)) { 7965b0c03e2SAlistair Francis error = PTR_ERR(ts->vdd); 7975b0c03e2SAlistair Francis return error; 7985b0c03e2SAlistair Francis } 7995b0c03e2SAlistair Francis 8005b0c03e2SAlistair Francis error = devm_add_action_or_reset(dev, cyttsp5_cleanup, ts); 8015b0c03e2SAlistair Francis if (error) 8025b0c03e2SAlistair Francis return error; 8035b0c03e2SAlistair Francis 8045b0c03e2SAlistair Francis error = regulator_enable(ts->vdd); 8055b0c03e2SAlistair Francis if (error) 8065b0c03e2SAlistair Francis return error; 8075b0c03e2SAlistair Francis 8085b0c03e2SAlistair Francis ts->input = devm_input_allocate_device(dev); 8095b0c03e2SAlistair Francis if (!ts->input) { 8105b0c03e2SAlistair Francis dev_err(dev, "Error, failed to allocate input device\n"); 8115b0c03e2SAlistair Francis return -ENODEV; 8125b0c03e2SAlistair Francis } 8135b0c03e2SAlistair Francis 8145b0c03e2SAlistair Francis ts->input->name = "cyttsp5"; 8155b0c03e2SAlistair Francis scnprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(dev)); 8165b0c03e2SAlistair Francis ts->input->phys = ts->phys; 8175b0c03e2SAlistair Francis input_set_drvdata(ts->input, ts); 8185b0c03e2SAlistair Francis 8195b0c03e2SAlistair Francis /* Reset the gpio to be in a reset state */ 8205b0c03e2SAlistair Francis ts->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); 8215b0c03e2SAlistair Francis if (IS_ERR(ts->reset_gpio)) { 8225b0c03e2SAlistair Francis error = PTR_ERR(ts->reset_gpio); 8235b0c03e2SAlistair Francis dev_err(dev, "Failed to request reset gpio, error %d\n", error); 8245b0c03e2SAlistair Francis return error; 8255b0c03e2SAlistair Francis } 8265b0c03e2SAlistair Francis gpiod_set_value_cansleep(ts->reset_gpio, 0); 8275b0c03e2SAlistair Francis 8285b0c03e2SAlistair Francis /* Need a delay to have device up */ 8295b0c03e2SAlistair Francis msleep(20); 8305b0c03e2SAlistair Francis 8315b0c03e2SAlistair Francis error = devm_request_threaded_irq(dev, irq, NULL, cyttsp5_handle_irq, 8325b0c03e2SAlistair Francis IRQF_ONESHOT, name, ts); 8335b0c03e2SAlistair Francis if (error) { 8345b0c03e2SAlistair Francis dev_err(dev, "unable to request IRQ\n"); 8355b0c03e2SAlistair Francis return error; 8365b0c03e2SAlistair Francis } 8375b0c03e2SAlistair Francis 8385b0c03e2SAlistair Francis error = cyttsp5_startup(ts); 8395b0c03e2SAlistair Francis if (error) { 8405b0c03e2SAlistair Francis dev_err(ts->dev, "Fail initial startup r=%d\n", error); 8415b0c03e2SAlistair Francis return error; 8425b0c03e2SAlistair Francis } 8435b0c03e2SAlistair Francis 8445b0c03e2SAlistair Francis error = cyttsp5_parse_dt_key_code(dev); 8455b0c03e2SAlistair Francis if (error < 0) { 8465b0c03e2SAlistair Francis dev_err(ts->dev, "Error while parsing dts %d\n", error); 8475b0c03e2SAlistair Francis return error; 8485b0c03e2SAlistair Francis } 8495b0c03e2SAlistair Francis 8505b0c03e2SAlistair Francis touchscreen_parse_properties(ts->input, true, &ts->prop); 8515b0c03e2SAlistair Francis 8525b0c03e2SAlistair Francis __set_bit(EV_KEY, ts->input->evbit); 8535b0c03e2SAlistair Francis for (i = 0; i < si->num_btns; i++) 8545b0c03e2SAlistair Francis __set_bit(si->key_code[i], ts->input->keybit); 8555b0c03e2SAlistair Francis 8565b0c03e2SAlistair Francis return cyttsp5_setup_input_device(dev); 8575b0c03e2SAlistair Francis } 8585b0c03e2SAlistair Francis 859eebf2bf1SUwe Kleine-König static int cyttsp5_i2c_probe(struct i2c_client *client) 8605b0c03e2SAlistair Francis { 8615b0c03e2SAlistair Francis struct regmap *regmap; 8625b0c03e2SAlistair Francis static const struct regmap_config config = { 8635b0c03e2SAlistair Francis .reg_bits = 8, 8645b0c03e2SAlistair Francis .val_bits = 8, 8655b0c03e2SAlistair Francis }; 8665b0c03e2SAlistair Francis 8675b0c03e2SAlistair Francis regmap = devm_regmap_init_i2c(client, &config); 8685b0c03e2SAlistair Francis if (IS_ERR(regmap)) { 8695b0c03e2SAlistair Francis dev_err(&client->dev, "regmap allocation failed: %ld\n", 8705b0c03e2SAlistair Francis PTR_ERR(regmap)); 8715b0c03e2SAlistair Francis return PTR_ERR(regmap); 8725b0c03e2SAlistair Francis } 8735b0c03e2SAlistair Francis 8745b0c03e2SAlistair Francis return cyttsp5_probe(&client->dev, regmap, client->irq, client->name); 8755b0c03e2SAlistair Francis } 8765b0c03e2SAlistair Francis 8775b0c03e2SAlistair Francis static const struct of_device_id cyttsp5_of_match[] = { 8785b0c03e2SAlistair Francis { .compatible = "cypress,tt21000", }, 8795b0c03e2SAlistair Francis { } 8805b0c03e2SAlistair Francis }; 8815b0c03e2SAlistair Francis MODULE_DEVICE_TABLE(of, cyttsp5_of_match); 8825b0c03e2SAlistair Francis 8835b0c03e2SAlistair Francis static const struct i2c_device_id cyttsp5_i2c_id[] = { 8845b0c03e2SAlistair Francis { CYTTSP5_NAME, 0, }, 8855b0c03e2SAlistair Francis { } 8865b0c03e2SAlistair Francis }; 8875b0c03e2SAlistair Francis MODULE_DEVICE_TABLE(i2c, cyttsp5_i2c_id); 8885b0c03e2SAlistair Francis 8895b0c03e2SAlistair Francis static struct i2c_driver cyttsp5_i2c_driver = { 8905b0c03e2SAlistair Francis .driver = { 8915b0c03e2SAlistair Francis .name = CYTTSP5_NAME, 8925b0c03e2SAlistair Francis .of_match_table = cyttsp5_of_match, 8935b0c03e2SAlistair Francis }, 894eebf2bf1SUwe Kleine-König .probe_new = cyttsp5_i2c_probe, 8955b0c03e2SAlistair Francis .id_table = cyttsp5_i2c_id, 8965b0c03e2SAlistair Francis }; 8975b0c03e2SAlistair Francis module_i2c_driver(cyttsp5_i2c_driver); 8985b0c03e2SAlistair Francis 8995b0c03e2SAlistair Francis MODULE_LICENSE("GPL"); 9005b0c03e2SAlistair Francis MODULE_DESCRIPTION("Touchscreen driver for Cypress TrueTouch Gen 5 Product"); 9015b0c03e2SAlistair Francis MODULE_AUTHOR("Mylène Josserand <mylene.josserand@bootlin.com>"); 902