1*5b0c03e2SAlistair Francis // SPDX-License-Identifier: GPL-2.0 2*5b0c03e2SAlistair Francis /* 3*5b0c03e2SAlistair Francis * Parade TrueTouch(TM) Standard Product V5 Module. 4*5b0c03e2SAlistair Francis * 5*5b0c03e2SAlistair Francis * Copyright (C) 2015 Parade Technologies 6*5b0c03e2SAlistair Francis * Copyright (C) 2012-2015 Cypress Semiconductor 7*5b0c03e2SAlistair Francis * Copyright (C) 2018 Bootlin 8*5b0c03e2SAlistair Francis * 9*5b0c03e2SAlistair Francis * Authors: Mylène Josserand <mylene.josserand@bootlin.com> 10*5b0c03e2SAlistair Francis * Alistair Francis <alistair@alistair23.me> 11*5b0c03e2SAlistair Francis */ 12*5b0c03e2SAlistair Francis 13*5b0c03e2SAlistair Francis #include <linux/crc-itu-t.h> 14*5b0c03e2SAlistair Francis #include <linux/delay.h> 15*5b0c03e2SAlistair Francis #include <linux/device.h> 16*5b0c03e2SAlistair Francis #include <linux/gpio/consumer.h> 17*5b0c03e2SAlistair Francis #include <linux/input/mt.h> 18*5b0c03e2SAlistair Francis #include <linux/input/touchscreen.h> 19*5b0c03e2SAlistair Francis #include <linux/interrupt.h> 20*5b0c03e2SAlistair Francis #include <linux/i2c.h> 21*5b0c03e2SAlistair Francis #include <linux/module.h> 22*5b0c03e2SAlistair Francis #include <linux/of_device.h> 23*5b0c03e2SAlistair Francis #include <linux/regmap.h> 24*5b0c03e2SAlistair Francis #include <asm/unaligned.h> 25*5b0c03e2SAlistair Francis 26*5b0c03e2SAlistair Francis #define CYTTSP5_NAME "cyttsp5" 27*5b0c03e2SAlistair Francis #define CY_I2C_DATA_SIZE (2 * 256) 28*5b0c03e2SAlistair Francis #define HID_VERSION 0x0100 29*5b0c03e2SAlistair Francis #define CY_MAX_INPUT 512 30*5b0c03e2SAlistair Francis #define CYTTSP5_PREALLOCATED_CMD_BUFFER 32 31*5b0c03e2SAlistair Francis #define CY_BITS_PER_BTN 1 32*5b0c03e2SAlistair Francis #define CY_NUM_BTN_EVENT_ID GENMASK(CY_BITS_PER_BTN, 0) 33*5b0c03e2SAlistair Francis 34*5b0c03e2SAlistair Francis #define MAX_AREA 255 35*5b0c03e2SAlistair Francis #define HID_OUTPUT_BL_SOP 0x1 36*5b0c03e2SAlistair Francis #define HID_OUTPUT_BL_EOP 0x17 37*5b0c03e2SAlistair Francis #define HID_OUTPUT_BL_LAUNCH_APP 0x3B 38*5b0c03e2SAlistair Francis #define HID_OUTPUT_BL_LAUNCH_APP_SIZE 11 39*5b0c03e2SAlistair Francis #define HID_OUTPUT_GET_SYSINFO 0x2 40*5b0c03e2SAlistair Francis #define HID_OUTPUT_GET_SYSINFO_SIZE 5 41*5b0c03e2SAlistair Francis #define HID_OUTPUT_MAX_CMD_SIZE 12 42*5b0c03e2SAlistair Francis 43*5b0c03e2SAlistair Francis #define HID_DESC_REG 0x1 44*5b0c03e2SAlistair Francis #define HID_INPUT_REG 0x3 45*5b0c03e2SAlistair Francis #define HID_OUTPUT_REG 0x4 46*5b0c03e2SAlistair Francis 47*5b0c03e2SAlistair Francis #define REPORT_ID_TOUCH 0x1 48*5b0c03e2SAlistair Francis #define REPORT_ID_BTN 0x3 49*5b0c03e2SAlistair Francis #define REPORT_SIZE_5 5 50*5b0c03e2SAlistair Francis #define REPORT_SIZE_8 8 51*5b0c03e2SAlistair Francis #define REPORT_SIZE_16 16 52*5b0c03e2SAlistair Francis 53*5b0c03e2SAlistair Francis /* Touch reports offsets */ 54*5b0c03e2SAlistair Francis /* Header offsets */ 55*5b0c03e2SAlistair Francis #define TOUCH_REPORT_DESC_HDR_CONTACTCOUNT 16 56*5b0c03e2SAlistair Francis /* Record offsets */ 57*5b0c03e2SAlistair Francis #define TOUCH_REPORT_DESC_CONTACTID 8 58*5b0c03e2SAlistair Francis #define TOUCH_REPORT_DESC_X 16 59*5b0c03e2SAlistair Francis #define TOUCH_REPORT_DESC_Y 32 60*5b0c03e2SAlistair Francis #define TOUCH_REPORT_DESC_P 48 61*5b0c03e2SAlistair Francis #define TOUCH_REPORT_DESC_MAJ 56 62*5b0c03e2SAlistair Francis #define TOUCH_REPORT_DESC_MIN 64 63*5b0c03e2SAlistair Francis 64*5b0c03e2SAlistair Francis /* HID */ 65*5b0c03e2SAlistair Francis #define HID_TOUCH_REPORT_ID 0x1 66*5b0c03e2SAlistair Francis #define HID_BTN_REPORT_ID 0x3 67*5b0c03e2SAlistair Francis #define HID_APP_RESPONSE_REPORT_ID 0x1F 68*5b0c03e2SAlistair Francis #define HID_APP_OUTPUT_REPORT_ID 0x2F 69*5b0c03e2SAlistair Francis #define HID_BL_RESPONSE_REPORT_ID 0x30 70*5b0c03e2SAlistair Francis #define HID_BL_OUTPUT_REPORT_ID 0x40 71*5b0c03e2SAlistair Francis 72*5b0c03e2SAlistair Francis #define HID_OUTPUT_RESPONSE_REPORT_OFFSET 2 73*5b0c03e2SAlistair Francis #define HID_OUTPUT_RESPONSE_CMD_OFFSET 4 74*5b0c03e2SAlistair Francis #define HID_OUTPUT_RESPONSE_CMD_MASK GENMASK(6, 0) 75*5b0c03e2SAlistair Francis 76*5b0c03e2SAlistair Francis #define HID_SYSINFO_SENSING_OFFSET 33 77*5b0c03e2SAlistair Francis #define HID_SYSINFO_BTN_OFFSET 48 78*5b0c03e2SAlistair Francis #define HID_SYSINFO_BTN_MASK GENMASK(7, 0) 79*5b0c03e2SAlistair Francis #define HID_SYSINFO_MAX_BTN 8 80*5b0c03e2SAlistair Francis 81*5b0c03e2SAlistair Francis #define CY_HID_OUTPUT_TIMEOUT_MS 200 82*5b0c03e2SAlistair Francis #define CY_HID_OUTPUT_GET_SYSINFO_TIMEOUT_MS 3000 83*5b0c03e2SAlistair Francis #define CY_HID_GET_HID_DESCRIPTOR_TIMEOUT_MS 4000 84*5b0c03e2SAlistair Francis 85*5b0c03e2SAlistair Francis /* maximum number of concurrent tracks */ 86*5b0c03e2SAlistair Francis #define TOUCH_REPORT_SIZE 10 87*5b0c03e2SAlistair Francis #define TOUCH_INPUT_HEADER_SIZE 7 88*5b0c03e2SAlistair Francis #define BTN_REPORT_SIZE 9 89*5b0c03e2SAlistair Francis #define BTN_INPUT_HEADER_SIZE 5 90*5b0c03e2SAlistair Francis 91*5b0c03e2SAlistair Francis #define MAX_CY_TCH_T_IDS 32 92*5b0c03e2SAlistair Francis 93*5b0c03e2SAlistair Francis /* All usage pages for Touch Report */ 94*5b0c03e2SAlistair Francis #define TOUCH_REPORT_USAGE_PG_X 0x00010030 95*5b0c03e2SAlistair Francis #define TOUCH_REPORT_USAGE_PG_Y 0x00010031 96*5b0c03e2SAlistair Francis #define TOUCH_REPORT_USAGE_PG_P 0x000D0030 97*5b0c03e2SAlistair Francis #define TOUCH_REPORT_USAGE_PG_CONTACTID 0x000D0051 98*5b0c03e2SAlistair Francis #define TOUCH_REPORT_USAGE_PG_CONTACTCOUNT 0x000D0054 99*5b0c03e2SAlistair Francis #define TOUCH_REPORT_USAGE_PG_MAJ 0xFF010062 100*5b0c03e2SAlistair Francis #define TOUCH_REPORT_USAGE_PG_MIN 0xFF010063 101*5b0c03e2SAlistair Francis #define TOUCH_COL_USAGE_PG 0x000D0022 102*5b0c03e2SAlistair Francis 103*5b0c03e2SAlistair Francis /* System Information interface definitions */ 104*5b0c03e2SAlistair Francis struct cyttsp5_sensing_conf_data_dev { 105*5b0c03e2SAlistair Francis u8 electrodes_x; 106*5b0c03e2SAlistair Francis u8 electrodes_y; 107*5b0c03e2SAlistair Francis __le16 len_x; 108*5b0c03e2SAlistair Francis __le16 len_y; 109*5b0c03e2SAlistair Francis __le16 res_x; 110*5b0c03e2SAlistair Francis __le16 res_y; 111*5b0c03e2SAlistair Francis __le16 max_z; 112*5b0c03e2SAlistair Francis u8 origin_x; 113*5b0c03e2SAlistair Francis u8 origin_y; 114*5b0c03e2SAlistair Francis u8 btn; 115*5b0c03e2SAlistair Francis u8 scan_mode; 116*5b0c03e2SAlistair Francis u8 max_num_of_tch_per_refresh_cycle; 117*5b0c03e2SAlistair Francis } __packed; 118*5b0c03e2SAlistair Francis 119*5b0c03e2SAlistair Francis struct cyttsp5_sensing_conf_data { 120*5b0c03e2SAlistair Francis u16 res_x; 121*5b0c03e2SAlistair Francis u16 res_y; 122*5b0c03e2SAlistair Francis u16 max_z; 123*5b0c03e2SAlistair Francis u16 len_x; 124*5b0c03e2SAlistair Francis u16 len_y; 125*5b0c03e2SAlistair Francis u8 origin_x; 126*5b0c03e2SAlistair Francis u8 origin_y; 127*5b0c03e2SAlistair Francis u8 max_tch; 128*5b0c03e2SAlistair Francis }; 129*5b0c03e2SAlistair Francis 130*5b0c03e2SAlistair Francis enum cyttsp5_tch_abs { /* for ordering within the extracted touch data array */ 131*5b0c03e2SAlistair Francis CY_TCH_X, /* X */ 132*5b0c03e2SAlistair Francis CY_TCH_Y, /* Y */ 133*5b0c03e2SAlistair Francis CY_TCH_P, /* P (Z) */ 134*5b0c03e2SAlistair Francis CY_TCH_T, /* TOUCH ID */ 135*5b0c03e2SAlistair Francis CY_TCH_MAJ, /* TOUCH_MAJOR */ 136*5b0c03e2SAlistair Francis CY_TCH_MIN, /* TOUCH_MINOR */ 137*5b0c03e2SAlistair Francis CY_TCH_NUM_ABS 138*5b0c03e2SAlistair Francis }; 139*5b0c03e2SAlistair Francis 140*5b0c03e2SAlistair Francis struct cyttsp5_tch_abs_params { 141*5b0c03e2SAlistair Francis size_t ofs; /* abs byte offset */ 142*5b0c03e2SAlistair Francis size_t size; /* size in bits */ 143*5b0c03e2SAlistair Francis size_t min; /* min value */ 144*5b0c03e2SAlistair Francis size_t max; /* max value */ 145*5b0c03e2SAlistair Francis size_t bofs; /* bit offset */ 146*5b0c03e2SAlistair Francis }; 147*5b0c03e2SAlistair Francis 148*5b0c03e2SAlistair Francis struct cyttsp5_touch { 149*5b0c03e2SAlistair Francis int abs[CY_TCH_NUM_ABS]; 150*5b0c03e2SAlistair Francis }; 151*5b0c03e2SAlistair Francis 152*5b0c03e2SAlistair Francis struct cyttsp5_sysinfo { 153*5b0c03e2SAlistair Francis struct cyttsp5_sensing_conf_data sensing_conf_data; 154*5b0c03e2SAlistair Francis int num_btns; 155*5b0c03e2SAlistair Francis struct cyttsp5_tch_abs_params tch_hdr; 156*5b0c03e2SAlistair Francis struct cyttsp5_tch_abs_params tch_abs[CY_TCH_NUM_ABS]; 157*5b0c03e2SAlistair Francis u32 key_code[HID_SYSINFO_MAX_BTN]; 158*5b0c03e2SAlistair Francis }; 159*5b0c03e2SAlistair Francis 160*5b0c03e2SAlistair Francis struct cyttsp5_hid_desc { 161*5b0c03e2SAlistair Francis __le16 hid_desc_len; 162*5b0c03e2SAlistair Francis u8 packet_id; 163*5b0c03e2SAlistair Francis u8 reserved_byte; 164*5b0c03e2SAlistair Francis __le16 bcd_version; 165*5b0c03e2SAlistair Francis __le16 report_desc_len; 166*5b0c03e2SAlistair Francis __le16 report_desc_register; 167*5b0c03e2SAlistair Francis __le16 input_register; 168*5b0c03e2SAlistair Francis __le16 max_input_len; 169*5b0c03e2SAlistair Francis __le16 output_register; 170*5b0c03e2SAlistair Francis __le16 max_output_len; 171*5b0c03e2SAlistair Francis __le16 command_register; 172*5b0c03e2SAlistair Francis __le16 data_register; 173*5b0c03e2SAlistair Francis __le16 vendor_id; 174*5b0c03e2SAlistair Francis __le16 product_id; 175*5b0c03e2SAlistair Francis __le16 version_id; 176*5b0c03e2SAlistair Francis u8 reserved[4]; 177*5b0c03e2SAlistair Francis } __packed; 178*5b0c03e2SAlistair Francis 179*5b0c03e2SAlistair Francis struct cyttsp5 { 180*5b0c03e2SAlistair Francis struct device *dev; 181*5b0c03e2SAlistair Francis struct completion cmd_done; 182*5b0c03e2SAlistair Francis struct cyttsp5_sysinfo sysinfo; 183*5b0c03e2SAlistair Francis struct cyttsp5_hid_desc hid_desc; 184*5b0c03e2SAlistair Francis u8 cmd_buf[CYTTSP5_PREALLOCATED_CMD_BUFFER]; 185*5b0c03e2SAlistair Francis u8 input_buf[CY_MAX_INPUT]; 186*5b0c03e2SAlistair Francis u8 response_buf[CY_MAX_INPUT]; 187*5b0c03e2SAlistair Francis struct gpio_desc *reset_gpio; 188*5b0c03e2SAlistair Francis struct input_dev *input; 189*5b0c03e2SAlistair Francis char phys[NAME_MAX]; 190*5b0c03e2SAlistair Francis int num_prv_rec; 191*5b0c03e2SAlistair Francis struct regmap *regmap; 192*5b0c03e2SAlistair Francis struct touchscreen_properties prop; 193*5b0c03e2SAlistair Francis struct regulator *vdd; 194*5b0c03e2SAlistair Francis }; 195*5b0c03e2SAlistair Francis 196*5b0c03e2SAlistair Francis /* 197*5b0c03e2SAlistair Francis * For what is understood in the datasheet, the register does not 198*5b0c03e2SAlistair Francis * matter. For consistency, use the Input Register address 199*5b0c03e2SAlistair Francis * but it does mean anything to the device. The important data 200*5b0c03e2SAlistair Francis * to send is the I2C address 201*5b0c03e2SAlistair Francis */ 202*5b0c03e2SAlistair Francis static int cyttsp5_read(struct cyttsp5 *ts, u8 *buf, u32 max) 203*5b0c03e2SAlistair Francis { 204*5b0c03e2SAlistair Francis int error; 205*5b0c03e2SAlistair Francis u32 size; 206*5b0c03e2SAlistair Francis u8 temp[2]; 207*5b0c03e2SAlistair Francis 208*5b0c03e2SAlistair Francis /* Read the frame to retrieve the size */ 209*5b0c03e2SAlistair Francis error = regmap_bulk_read(ts->regmap, HID_INPUT_REG, temp, sizeof(temp)); 210*5b0c03e2SAlistair Francis if (error) 211*5b0c03e2SAlistair Francis return error; 212*5b0c03e2SAlistair Francis 213*5b0c03e2SAlistair Francis size = get_unaligned_le16(temp); 214*5b0c03e2SAlistair Francis if (!size || size == 2) 215*5b0c03e2SAlistair Francis return 0; 216*5b0c03e2SAlistair Francis 217*5b0c03e2SAlistair Francis if (size > max) 218*5b0c03e2SAlistair Francis return -EINVAL; 219*5b0c03e2SAlistair Francis 220*5b0c03e2SAlistair Francis /* Get the real value */ 221*5b0c03e2SAlistair Francis return regmap_bulk_read(ts->regmap, HID_INPUT_REG, buf, size); 222*5b0c03e2SAlistair Francis } 223*5b0c03e2SAlistair Francis 224*5b0c03e2SAlistair Francis static int cyttsp5_write(struct cyttsp5 *ts, unsigned int reg, u8 *data, 225*5b0c03e2SAlistair Francis size_t size) 226*5b0c03e2SAlistair Francis { 227*5b0c03e2SAlistair Francis u8 cmd[HID_OUTPUT_MAX_CMD_SIZE]; 228*5b0c03e2SAlistair Francis 229*5b0c03e2SAlistair Francis if (size + 1 > HID_OUTPUT_MAX_CMD_SIZE) 230*5b0c03e2SAlistair Francis return -E2BIG; 231*5b0c03e2SAlistair Francis 232*5b0c03e2SAlistair Francis /* High bytes of register address needed as first byte of cmd */ 233*5b0c03e2SAlistair Francis cmd[0] = (reg >> 8) & 0xFF; 234*5b0c03e2SAlistair Francis 235*5b0c03e2SAlistair Francis /* Copy the rest of the data */ 236*5b0c03e2SAlistair Francis if (data) 237*5b0c03e2SAlistair Francis memcpy(&cmd[1], data, size); 238*5b0c03e2SAlistair Francis 239*5b0c03e2SAlistair Francis /* 240*5b0c03e2SAlistair Francis * The hardware wants to receive a frame with the address register 241*5b0c03e2SAlistair Francis * contained in the first two bytes. As the regmap_write function 242*5b0c03e2SAlistair Francis * add the register adresse in the frame, we use the low byte as 243*5b0c03e2SAlistair Francis * first frame byte for the address register and the first 244*5b0c03e2SAlistair Francis * data byte is the high register + left of the cmd to send 245*5b0c03e2SAlistair Francis */ 246*5b0c03e2SAlistair Francis return regmap_bulk_write(ts->regmap, reg & 0xFF, cmd, size + 1); 247*5b0c03e2SAlistair Francis } 248*5b0c03e2SAlistair Francis 249*5b0c03e2SAlistair Francis static void cyttsp5_get_touch_axis(int *axis, int size, int max, u8 *xy_data, 250*5b0c03e2SAlistair Francis int bofs) 251*5b0c03e2SAlistair Francis { 252*5b0c03e2SAlistair Francis int nbyte; 253*5b0c03e2SAlistair Francis 254*5b0c03e2SAlistair Francis for (nbyte = 0, *axis = 0; nbyte < size; nbyte++) 255*5b0c03e2SAlistair Francis *axis += ((xy_data[nbyte] >> bofs) << (nbyte * 8)); 256*5b0c03e2SAlistair Francis 257*5b0c03e2SAlistair Francis *axis &= max - 1; 258*5b0c03e2SAlistair Francis } 259*5b0c03e2SAlistair Francis 260*5b0c03e2SAlistair Francis static void cyttsp5_get_touch_record(struct cyttsp5 *ts, 261*5b0c03e2SAlistair Francis struct cyttsp5_touch *touch, u8 *xy_data) 262*5b0c03e2SAlistair Francis { 263*5b0c03e2SAlistair Francis struct cyttsp5_sysinfo *si = &ts->sysinfo; 264*5b0c03e2SAlistair Francis enum cyttsp5_tch_abs abs; 265*5b0c03e2SAlistair Francis 266*5b0c03e2SAlistair Francis for (abs = CY_TCH_X; abs < CY_TCH_NUM_ABS; abs++) 267*5b0c03e2SAlistair Francis cyttsp5_get_touch_axis(&touch->abs[abs], 268*5b0c03e2SAlistair Francis si->tch_abs[abs].size, 269*5b0c03e2SAlistair Francis si->tch_abs[abs].max, 270*5b0c03e2SAlistair Francis xy_data + si->tch_abs[abs].ofs, 271*5b0c03e2SAlistair Francis si->tch_abs[abs].bofs); 272*5b0c03e2SAlistair Francis } 273*5b0c03e2SAlistair Francis 274*5b0c03e2SAlistair Francis static void cyttsp5_get_mt_touches(struct cyttsp5 *ts, 275*5b0c03e2SAlistair Francis struct cyttsp5_touch *tch, int num_cur_tch) 276*5b0c03e2SAlistair Francis { 277*5b0c03e2SAlistair Francis struct cyttsp5_sysinfo *si = &ts->sysinfo; 278*5b0c03e2SAlistair Francis int i, t = 0, offset = 0; 279*5b0c03e2SAlistair Francis DECLARE_BITMAP(ids, MAX_CY_TCH_T_IDS); 280*5b0c03e2SAlistair Francis u8 *tch_addr; 281*5b0c03e2SAlistair Francis int tmp; 282*5b0c03e2SAlistair Francis 283*5b0c03e2SAlistair Francis bitmap_zero(ids, MAX_CY_TCH_T_IDS); 284*5b0c03e2SAlistair Francis memset(tch->abs, 0, sizeof(tch->abs)); 285*5b0c03e2SAlistair Francis 286*5b0c03e2SAlistair Francis switch (ts->input_buf[2]) { 287*5b0c03e2SAlistair Francis case HID_TOUCH_REPORT_ID: 288*5b0c03e2SAlistair Francis offset = TOUCH_INPUT_HEADER_SIZE; 289*5b0c03e2SAlistair Francis break; 290*5b0c03e2SAlistair Francis case HID_BTN_REPORT_ID: 291*5b0c03e2SAlistair Francis offset = BTN_INPUT_HEADER_SIZE; 292*5b0c03e2SAlistair Francis break; 293*5b0c03e2SAlistair Francis } 294*5b0c03e2SAlistair Francis 295*5b0c03e2SAlistair Francis for (i = 0; i < num_cur_tch; i++) { 296*5b0c03e2SAlistair Francis tch_addr = ts->input_buf + offset + (i * TOUCH_REPORT_SIZE); 297*5b0c03e2SAlistair Francis cyttsp5_get_touch_record(ts, tch, tch_addr); 298*5b0c03e2SAlistair Francis 299*5b0c03e2SAlistair Francis /* Convert MAJOR/MINOR from mm to resolution */ 300*5b0c03e2SAlistair Francis tmp = tch->abs[CY_TCH_MAJ] * 100 * si->sensing_conf_data.res_x; 301*5b0c03e2SAlistair Francis tch->abs[CY_TCH_MAJ] = tmp / si->sensing_conf_data.len_x; 302*5b0c03e2SAlistair Francis tmp = tch->abs[CY_TCH_MIN] * 100 * si->sensing_conf_data.res_x; 303*5b0c03e2SAlistair Francis tch->abs[CY_TCH_MIN] = tmp / si->sensing_conf_data.len_x; 304*5b0c03e2SAlistair Francis 305*5b0c03e2SAlistair Francis t = tch->abs[CY_TCH_T]; 306*5b0c03e2SAlistair Francis input_mt_slot(ts->input, t); 307*5b0c03e2SAlistair Francis input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, true); 308*5b0c03e2SAlistair Francis __set_bit(t, ids); 309*5b0c03e2SAlistair Francis 310*5b0c03e2SAlistair Francis /* position and pressure fields */ 311*5b0c03e2SAlistair Francis touchscreen_report_pos(ts->input, &ts->prop, 312*5b0c03e2SAlistair Francis tch->abs[CY_TCH_X], tch->abs[CY_TCH_Y], 313*5b0c03e2SAlistair Francis true); 314*5b0c03e2SAlistair Francis input_report_abs(ts->input, ABS_MT_PRESSURE, 315*5b0c03e2SAlistair Francis tch->abs[CY_TCH_P]); 316*5b0c03e2SAlistair Francis 317*5b0c03e2SAlistair Francis /* Get the extended touch fields */ 318*5b0c03e2SAlistair Francis input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, 319*5b0c03e2SAlistair Francis tch->abs[CY_TCH_MAJ]); 320*5b0c03e2SAlistair Francis input_report_abs(ts->input, ABS_MT_TOUCH_MINOR, 321*5b0c03e2SAlistair Francis tch->abs[CY_TCH_MIN]); 322*5b0c03e2SAlistair Francis } 323*5b0c03e2SAlistair Francis 324*5b0c03e2SAlistair Francis ts->num_prv_rec = num_cur_tch; 325*5b0c03e2SAlistair Francis } 326*5b0c03e2SAlistair Francis 327*5b0c03e2SAlistair Francis static int cyttsp5_mt_attention(struct device *dev) 328*5b0c03e2SAlistair Francis { 329*5b0c03e2SAlistair Francis struct cyttsp5 *ts = dev_get_drvdata(dev); 330*5b0c03e2SAlistair Francis struct cyttsp5_sysinfo *si = &ts->sysinfo; 331*5b0c03e2SAlistair Francis int max_tch = si->sensing_conf_data.max_tch; 332*5b0c03e2SAlistair Francis struct cyttsp5_touch tch; 333*5b0c03e2SAlistair Francis int num_cur_tch; 334*5b0c03e2SAlistair Francis 335*5b0c03e2SAlistair Francis cyttsp5_get_touch_axis(&num_cur_tch, si->tch_hdr.size, 336*5b0c03e2SAlistair Francis si->tch_hdr.max, 337*5b0c03e2SAlistair Francis ts->input_buf + 3 + si->tch_hdr.ofs, 338*5b0c03e2SAlistair Francis si->tch_hdr.bofs); 339*5b0c03e2SAlistair Francis 340*5b0c03e2SAlistair Francis if (num_cur_tch > max_tch) { 341*5b0c03e2SAlistair Francis dev_err(dev, "Num touch err detected (n=%d)\n", num_cur_tch); 342*5b0c03e2SAlistair Francis num_cur_tch = max_tch; 343*5b0c03e2SAlistair Francis } 344*5b0c03e2SAlistair Francis 345*5b0c03e2SAlistair Francis if (num_cur_tch == 0 && ts->num_prv_rec == 0) 346*5b0c03e2SAlistair Francis return 0; 347*5b0c03e2SAlistair Francis 348*5b0c03e2SAlistair Francis /* extract xy_data for all currently reported touches */ 349*5b0c03e2SAlistair Francis if (num_cur_tch) 350*5b0c03e2SAlistair Francis cyttsp5_get_mt_touches(ts, &tch, num_cur_tch); 351*5b0c03e2SAlistair Francis 352*5b0c03e2SAlistair Francis input_mt_sync_frame(ts->input); 353*5b0c03e2SAlistair Francis input_sync(ts->input); 354*5b0c03e2SAlistair Francis 355*5b0c03e2SAlistair Francis return 0; 356*5b0c03e2SAlistair Francis } 357*5b0c03e2SAlistair Francis 358*5b0c03e2SAlistair Francis static int cyttsp5_setup_input_device(struct device *dev) 359*5b0c03e2SAlistair Francis { 360*5b0c03e2SAlistair Francis struct cyttsp5 *ts = dev_get_drvdata(dev); 361*5b0c03e2SAlistair Francis struct cyttsp5_sysinfo *si = &ts->sysinfo; 362*5b0c03e2SAlistair Francis int max_x, max_y, max_p; 363*5b0c03e2SAlistair Francis int max_x_tmp, max_y_tmp; 364*5b0c03e2SAlistair Francis int error; 365*5b0c03e2SAlistair Francis 366*5b0c03e2SAlistair Francis max_x_tmp = si->sensing_conf_data.res_x; 367*5b0c03e2SAlistair Francis max_y_tmp = si->sensing_conf_data.res_y; 368*5b0c03e2SAlistair Francis max_x = max_x_tmp - 1; 369*5b0c03e2SAlistair Francis max_y = max_y_tmp - 1; 370*5b0c03e2SAlistair Francis max_p = si->sensing_conf_data.max_z; 371*5b0c03e2SAlistair Francis 372*5b0c03e2SAlistair Francis input_set_abs_params(ts->input, ABS_MT_POSITION_X, 0, max_x, 0, 0); 373*5b0c03e2SAlistair Francis input_set_abs_params(ts->input, ABS_MT_POSITION_Y, 0, max_y, 0, 0); 374*5b0c03e2SAlistair Francis input_set_abs_params(ts->input, ABS_MT_PRESSURE, 0, max_p, 0, 0); 375*5b0c03e2SAlistair Francis 376*5b0c03e2SAlistair Francis input_set_abs_params(ts->input, ABS_MT_TOUCH_MAJOR, 0, MAX_AREA, 0, 0); 377*5b0c03e2SAlistair Francis input_set_abs_params(ts->input, ABS_MT_TOUCH_MINOR, 0, MAX_AREA, 0, 0); 378*5b0c03e2SAlistair Francis 379*5b0c03e2SAlistair Francis error = input_mt_init_slots(ts->input, si->tch_abs[CY_TCH_T].max, 380*5b0c03e2SAlistair Francis INPUT_MT_DROP_UNUSED | INPUT_MT_DIRECT); 381*5b0c03e2SAlistair Francis if (error) 382*5b0c03e2SAlistair Francis return error; 383*5b0c03e2SAlistair Francis 384*5b0c03e2SAlistair Francis error = input_register_device(ts->input); 385*5b0c03e2SAlistair Francis if (error) { 386*5b0c03e2SAlistair Francis dev_err(dev, "failed to register input device: %d\n", error); 387*5b0c03e2SAlistair Francis return error; 388*5b0c03e2SAlistair Francis } 389*5b0c03e2SAlistair Francis 390*5b0c03e2SAlistair Francis return error; 391*5b0c03e2SAlistair Francis } 392*5b0c03e2SAlistair Francis 393*5b0c03e2SAlistair Francis static int cyttsp5_parse_dt_key_code(struct device *dev) 394*5b0c03e2SAlistair Francis { 395*5b0c03e2SAlistair Francis struct cyttsp5 *ts = dev_get_drvdata(dev); 396*5b0c03e2SAlistair Francis struct cyttsp5_sysinfo *si = &ts->sysinfo; 397*5b0c03e2SAlistair Francis 398*5b0c03e2SAlistair Francis if (!si->num_btns) 399*5b0c03e2SAlistair Francis return 0; 400*5b0c03e2SAlistair Francis 401*5b0c03e2SAlistair Francis /* Initialize the button to RESERVED */ 402*5b0c03e2SAlistair Francis memset32(si->key_code, KEY_RESERVED, si->num_btns); 403*5b0c03e2SAlistair Francis 404*5b0c03e2SAlistair Francis return device_property_read_u32_array(dev, "linux,keycodes", 405*5b0c03e2SAlistair Francis si->key_code, si->num_btns); 406*5b0c03e2SAlistair Francis } 407*5b0c03e2SAlistair Francis 408*5b0c03e2SAlistair Francis static int cyttsp5_btn_attention(struct device *dev) 409*5b0c03e2SAlistair Francis { 410*5b0c03e2SAlistair Francis struct cyttsp5 *ts = dev_get_drvdata(dev); 411*5b0c03e2SAlistair Francis struct cyttsp5_sysinfo *si = &ts->sysinfo; 412*5b0c03e2SAlistair Francis int cur_btn, offset = 0; 413*5b0c03e2SAlistair Francis int cur_btn_state; 414*5b0c03e2SAlistair Francis 415*5b0c03e2SAlistair Francis switch (ts->input_buf[2]) { 416*5b0c03e2SAlistair Francis case HID_TOUCH_REPORT_ID: 417*5b0c03e2SAlistair Francis offset = TOUCH_INPUT_HEADER_SIZE; 418*5b0c03e2SAlistair Francis break; 419*5b0c03e2SAlistair Francis case HID_BTN_REPORT_ID: 420*5b0c03e2SAlistair Francis offset = BTN_INPUT_HEADER_SIZE; 421*5b0c03e2SAlistair Francis break; 422*5b0c03e2SAlistair Francis } 423*5b0c03e2SAlistair Francis 424*5b0c03e2SAlistair Francis if (ts->input_buf[2] != HID_BTN_REPORT_ID) 425*5b0c03e2SAlistair Francis return 0; 426*5b0c03e2SAlistair Francis 427*5b0c03e2SAlistair Francis /* extract button press/release touch information */ 428*5b0c03e2SAlistair Francis for (cur_btn = 0; cur_btn < si->num_btns; cur_btn++) { 429*5b0c03e2SAlistair Francis /* Get current button state */ 430*5b0c03e2SAlistair Francis cur_btn_state = (ts->input_buf[offset] >> (cur_btn * CY_BITS_PER_BTN)) 431*5b0c03e2SAlistair Francis & CY_NUM_BTN_EVENT_ID; 432*5b0c03e2SAlistair Francis 433*5b0c03e2SAlistair Francis input_report_key(ts->input, si->key_code[cur_btn], 434*5b0c03e2SAlistair Francis cur_btn_state); 435*5b0c03e2SAlistair Francis input_sync(ts->input); 436*5b0c03e2SAlistair Francis } 437*5b0c03e2SAlistair Francis 438*5b0c03e2SAlistair Francis return 0; 439*5b0c03e2SAlistair Francis } 440*5b0c03e2SAlistair Francis 441*5b0c03e2SAlistair Francis static int cyttsp5_validate_cmd_response(struct cyttsp5 *ts, u8 code) 442*5b0c03e2SAlistair Francis { 443*5b0c03e2SAlistair Francis u16 size, crc; 444*5b0c03e2SAlistair Francis u8 status, report_id; 445*5b0c03e2SAlistair Francis int command_code; 446*5b0c03e2SAlistair Francis 447*5b0c03e2SAlistair Francis size = get_unaligned_le16(&ts->response_buf[0]); 448*5b0c03e2SAlistair Francis if (!size) 449*5b0c03e2SAlistair Francis return 0; 450*5b0c03e2SAlistair Francis 451*5b0c03e2SAlistair Francis report_id = ts->response_buf[HID_OUTPUT_RESPONSE_REPORT_OFFSET]; 452*5b0c03e2SAlistair Francis 453*5b0c03e2SAlistair Francis switch (report_id) { 454*5b0c03e2SAlistair Francis case HID_BL_RESPONSE_REPORT_ID: 455*5b0c03e2SAlistair Francis if (ts->response_buf[4] != HID_OUTPUT_BL_SOP) { 456*5b0c03e2SAlistair Francis dev_err(ts->dev, "HID output response, wrong SOP\n"); 457*5b0c03e2SAlistair Francis return -EPROTO; 458*5b0c03e2SAlistair Francis } 459*5b0c03e2SAlistair Francis 460*5b0c03e2SAlistair Francis if (ts->response_buf[size - 1] != HID_OUTPUT_BL_EOP) { 461*5b0c03e2SAlistair Francis dev_err(ts->dev, "HID output response, wrong EOP\n"); 462*5b0c03e2SAlistair Francis return -EPROTO; 463*5b0c03e2SAlistair Francis } 464*5b0c03e2SAlistair Francis 465*5b0c03e2SAlistair Francis crc = crc_itu_t(0xFFFF, &ts->response_buf[4], size - 7); 466*5b0c03e2SAlistair Francis if (get_unaligned_le16(&ts->response_buf[size - 3]) != crc) { 467*5b0c03e2SAlistair Francis dev_err(ts->dev, 468*5b0c03e2SAlistair Francis "HID output response, wrong CRC 0x%X\n", 469*5b0c03e2SAlistair Francis crc); 470*5b0c03e2SAlistair Francis return -EPROTO; 471*5b0c03e2SAlistair Francis } 472*5b0c03e2SAlistair Francis 473*5b0c03e2SAlistair Francis status = ts->response_buf[5]; 474*5b0c03e2SAlistair Francis if (status) { 475*5b0c03e2SAlistair Francis dev_err(ts->dev, "HID output response, ERROR:%d\n", 476*5b0c03e2SAlistair Francis status); 477*5b0c03e2SAlistair Francis return -EPROTO; 478*5b0c03e2SAlistair Francis } 479*5b0c03e2SAlistair Francis break; 480*5b0c03e2SAlistair Francis 481*5b0c03e2SAlistair Francis case HID_APP_RESPONSE_REPORT_ID: 482*5b0c03e2SAlistair Francis command_code = ts->response_buf[HID_OUTPUT_RESPONSE_CMD_OFFSET] 483*5b0c03e2SAlistair Francis & HID_OUTPUT_RESPONSE_CMD_MASK; 484*5b0c03e2SAlistair Francis if (command_code != code) { 485*5b0c03e2SAlistair Francis dev_err(ts->dev, 486*5b0c03e2SAlistair Francis "HID output response, wrong command_code:%X\n", 487*5b0c03e2SAlistair Francis command_code); 488*5b0c03e2SAlistair Francis return -EPROTO; 489*5b0c03e2SAlistair Francis } 490*5b0c03e2SAlistair Francis break; 491*5b0c03e2SAlistair Francis } 492*5b0c03e2SAlistair Francis 493*5b0c03e2SAlistair Francis return 0; 494*5b0c03e2SAlistair Francis } 495*5b0c03e2SAlistair Francis 496*5b0c03e2SAlistair Francis static void cyttsp5_si_get_btn_data(struct cyttsp5 *ts) 497*5b0c03e2SAlistair Francis { 498*5b0c03e2SAlistair Francis struct cyttsp5_sysinfo *si = &ts->sysinfo; 499*5b0c03e2SAlistair Francis unsigned int btns = ts->response_buf[HID_SYSINFO_BTN_OFFSET] & 500*5b0c03e2SAlistair Francis HID_SYSINFO_BTN_MASK; 501*5b0c03e2SAlistair Francis 502*5b0c03e2SAlistair Francis si->num_btns = hweight8(btns); 503*5b0c03e2SAlistair Francis } 504*5b0c03e2SAlistair Francis 505*5b0c03e2SAlistair Francis static int cyttsp5_get_sysinfo_regs(struct cyttsp5 *ts) 506*5b0c03e2SAlistair Francis { 507*5b0c03e2SAlistair Francis struct cyttsp5_sensing_conf_data *scd = &ts->sysinfo.sensing_conf_data; 508*5b0c03e2SAlistair Francis struct cyttsp5_sensing_conf_data_dev *scd_dev = 509*5b0c03e2SAlistair Francis (struct cyttsp5_sensing_conf_data_dev *) 510*5b0c03e2SAlistair Francis &ts->response_buf[HID_SYSINFO_SENSING_OFFSET]; 511*5b0c03e2SAlistair Francis 512*5b0c03e2SAlistair Francis cyttsp5_si_get_btn_data(ts); 513*5b0c03e2SAlistair Francis 514*5b0c03e2SAlistair Francis scd->max_tch = scd_dev->max_num_of_tch_per_refresh_cycle; 515*5b0c03e2SAlistair Francis scd->res_x = get_unaligned_le16(&scd_dev->res_x); 516*5b0c03e2SAlistair Francis scd->res_y = get_unaligned_le16(&scd_dev->res_y); 517*5b0c03e2SAlistair Francis scd->max_z = get_unaligned_le16(&scd_dev->max_z); 518*5b0c03e2SAlistair Francis scd->len_x = get_unaligned_le16(&scd_dev->len_x); 519*5b0c03e2SAlistair Francis scd->len_y = get_unaligned_le16(&scd_dev->len_y); 520*5b0c03e2SAlistair Francis 521*5b0c03e2SAlistair Francis return 0; 522*5b0c03e2SAlistair Francis } 523*5b0c03e2SAlistair Francis 524*5b0c03e2SAlistair Francis static int cyttsp5_hid_output_get_sysinfo(struct cyttsp5 *ts) 525*5b0c03e2SAlistair Francis { 526*5b0c03e2SAlistair Francis int rc; 527*5b0c03e2SAlistair Francis u8 cmd[HID_OUTPUT_GET_SYSINFO_SIZE]; 528*5b0c03e2SAlistair Francis 529*5b0c03e2SAlistair Francis /* HI bytes of Output register address */ 530*5b0c03e2SAlistair Francis put_unaligned_le16(HID_OUTPUT_GET_SYSINFO_SIZE, cmd); 531*5b0c03e2SAlistair Francis cmd[2] = HID_APP_OUTPUT_REPORT_ID; 532*5b0c03e2SAlistair Francis cmd[3] = 0x0; /* Reserved */ 533*5b0c03e2SAlistair Francis cmd[4] = HID_OUTPUT_GET_SYSINFO; 534*5b0c03e2SAlistair Francis 535*5b0c03e2SAlistair Francis rc = cyttsp5_write(ts, HID_OUTPUT_REG, cmd, 536*5b0c03e2SAlistair Francis HID_OUTPUT_GET_SYSINFO_SIZE); 537*5b0c03e2SAlistair Francis if (rc) { 538*5b0c03e2SAlistair Francis dev_err(ts->dev, "Failed to write command %d", rc); 539*5b0c03e2SAlistair Francis return rc; 540*5b0c03e2SAlistair Francis } 541*5b0c03e2SAlistair Francis 542*5b0c03e2SAlistair Francis rc = wait_for_completion_interruptible_timeout(&ts->cmd_done, 543*5b0c03e2SAlistair Francis msecs_to_jiffies(CY_HID_OUTPUT_GET_SYSINFO_TIMEOUT_MS)); 544*5b0c03e2SAlistair Francis if (rc <= 0) { 545*5b0c03e2SAlistair Francis dev_err(ts->dev, "HID output cmd execution timed out\n"); 546*5b0c03e2SAlistair Francis rc = -ETIMEDOUT; 547*5b0c03e2SAlistair Francis return rc; 548*5b0c03e2SAlistair Francis } 549*5b0c03e2SAlistair Francis 550*5b0c03e2SAlistair Francis rc = cyttsp5_validate_cmd_response(ts, HID_OUTPUT_GET_SYSINFO); 551*5b0c03e2SAlistair Francis if (rc) { 552*5b0c03e2SAlistair Francis dev_err(ts->dev, "Validation of the response failed\n"); 553*5b0c03e2SAlistair Francis return rc; 554*5b0c03e2SAlistair Francis } 555*5b0c03e2SAlistair Francis 556*5b0c03e2SAlistair Francis return cyttsp5_get_sysinfo_regs(ts); 557*5b0c03e2SAlistair Francis } 558*5b0c03e2SAlistair Francis 559*5b0c03e2SAlistair Francis static int cyttsp5_hid_output_bl_launch_app(struct cyttsp5 *ts) 560*5b0c03e2SAlistair Francis { 561*5b0c03e2SAlistair Francis int rc; 562*5b0c03e2SAlistair Francis u8 cmd[HID_OUTPUT_BL_LAUNCH_APP]; 563*5b0c03e2SAlistair Francis u16 crc; 564*5b0c03e2SAlistair Francis 565*5b0c03e2SAlistair Francis put_unaligned_le16(HID_OUTPUT_BL_LAUNCH_APP_SIZE, cmd); 566*5b0c03e2SAlistair Francis cmd[2] = HID_BL_OUTPUT_REPORT_ID; 567*5b0c03e2SAlistair Francis cmd[3] = 0x0; /* Reserved */ 568*5b0c03e2SAlistair Francis cmd[4] = HID_OUTPUT_BL_SOP; 569*5b0c03e2SAlistair Francis cmd[5] = HID_OUTPUT_BL_LAUNCH_APP; 570*5b0c03e2SAlistair Francis put_unaligned_le16(0x00, &cmd[6]); 571*5b0c03e2SAlistair Francis crc = crc_itu_t(0xFFFF, &cmd[4], 4); 572*5b0c03e2SAlistair Francis put_unaligned_le16(crc, &cmd[8]); 573*5b0c03e2SAlistair Francis cmd[10] = HID_OUTPUT_BL_EOP; 574*5b0c03e2SAlistair Francis 575*5b0c03e2SAlistair Francis rc = cyttsp5_write(ts, HID_OUTPUT_REG, cmd, 576*5b0c03e2SAlistair Francis HID_OUTPUT_BL_LAUNCH_APP_SIZE); 577*5b0c03e2SAlistair Francis if (rc) { 578*5b0c03e2SAlistair Francis dev_err(ts->dev, "Failed to write command %d", rc); 579*5b0c03e2SAlistair Francis return rc; 580*5b0c03e2SAlistair Francis } 581*5b0c03e2SAlistair Francis 582*5b0c03e2SAlistair Francis rc = wait_for_completion_interruptible_timeout(&ts->cmd_done, 583*5b0c03e2SAlistair Francis msecs_to_jiffies(CY_HID_OUTPUT_TIMEOUT_MS)); 584*5b0c03e2SAlistair Francis if (rc <= 0) { 585*5b0c03e2SAlistair Francis dev_err(ts->dev, "HID output cmd execution timed out\n"); 586*5b0c03e2SAlistair Francis rc = -ETIMEDOUT; 587*5b0c03e2SAlistair Francis return rc; 588*5b0c03e2SAlistair Francis } 589*5b0c03e2SAlistair Francis 590*5b0c03e2SAlistair Francis rc = cyttsp5_validate_cmd_response(ts, HID_OUTPUT_BL_LAUNCH_APP); 591*5b0c03e2SAlistair Francis if (rc) { 592*5b0c03e2SAlistair Francis dev_err(ts->dev, "Validation of the response failed\n"); 593*5b0c03e2SAlistair Francis return rc; 594*5b0c03e2SAlistair Francis } 595*5b0c03e2SAlistair Francis 596*5b0c03e2SAlistair Francis return 0; 597*5b0c03e2SAlistair Francis } 598*5b0c03e2SAlistair Francis 599*5b0c03e2SAlistair Francis static int cyttsp5_get_hid_descriptor(struct cyttsp5 *ts, 600*5b0c03e2SAlistair Francis struct cyttsp5_hid_desc *desc) 601*5b0c03e2SAlistair Francis { 602*5b0c03e2SAlistair Francis struct device *dev = ts->dev; 603*5b0c03e2SAlistair Francis __le16 hid_desc_register = cpu_to_le16(HID_DESC_REG); 604*5b0c03e2SAlistair Francis int rc; 605*5b0c03e2SAlistair Francis u8 cmd[2]; 606*5b0c03e2SAlistair Francis 607*5b0c03e2SAlistair Francis /* Set HID descriptor register */ 608*5b0c03e2SAlistair Francis memcpy(cmd, &hid_desc_register, sizeof(hid_desc_register)); 609*5b0c03e2SAlistair Francis 610*5b0c03e2SAlistair Francis rc = cyttsp5_write(ts, HID_DESC_REG, NULL, 0); 611*5b0c03e2SAlistair Francis if (rc) { 612*5b0c03e2SAlistair Francis dev_err(dev, "Failed to get HID descriptor, rc=%d\n", rc); 613*5b0c03e2SAlistair Francis return rc; 614*5b0c03e2SAlistair Francis } 615*5b0c03e2SAlistair Francis 616*5b0c03e2SAlistair Francis rc = wait_for_completion_interruptible_timeout(&ts->cmd_done, 617*5b0c03e2SAlistair Francis msecs_to_jiffies(CY_HID_GET_HID_DESCRIPTOR_TIMEOUT_MS)); 618*5b0c03e2SAlistair Francis if (rc <= 0) { 619*5b0c03e2SAlistair Francis dev_err(ts->dev, "HID get descriptor timed out\n"); 620*5b0c03e2SAlistair Francis rc = -ETIMEDOUT; 621*5b0c03e2SAlistair Francis return rc; 622*5b0c03e2SAlistair Francis } 623*5b0c03e2SAlistair Francis 624*5b0c03e2SAlistair Francis memcpy(desc, ts->response_buf, sizeof(*desc)); 625*5b0c03e2SAlistair Francis 626*5b0c03e2SAlistair Francis /* Check HID descriptor length and version */ 627*5b0c03e2SAlistair Francis if (le16_to_cpu(desc->hid_desc_len) != sizeof(*desc) || 628*5b0c03e2SAlistair Francis le16_to_cpu(desc->bcd_version) != HID_VERSION) { 629*5b0c03e2SAlistair Francis dev_err(dev, "Unsupported HID version\n"); 630*5b0c03e2SAlistair Francis return -ENODEV; 631*5b0c03e2SAlistair Francis } 632*5b0c03e2SAlistair Francis 633*5b0c03e2SAlistair Francis return 0; 634*5b0c03e2SAlistair Francis } 635*5b0c03e2SAlistair Francis 636*5b0c03e2SAlistair Francis static int fill_tch_abs(struct cyttsp5_tch_abs_params *tch_abs, int report_size, 637*5b0c03e2SAlistair Francis int offset) 638*5b0c03e2SAlistair Francis { 639*5b0c03e2SAlistair Francis tch_abs->ofs = offset / 8; 640*5b0c03e2SAlistair Francis tch_abs->size = report_size / 8; 641*5b0c03e2SAlistair Francis if (report_size % 8) 642*5b0c03e2SAlistair Francis tch_abs->size += 1; 643*5b0c03e2SAlistair Francis tch_abs->min = 0; 644*5b0c03e2SAlistair Francis tch_abs->max = 1 << report_size; 645*5b0c03e2SAlistair Francis tch_abs->bofs = offset - (tch_abs->ofs << 3); 646*5b0c03e2SAlistair Francis 647*5b0c03e2SAlistair Francis return 0; 648*5b0c03e2SAlistair Francis } 649*5b0c03e2SAlistair Francis 650*5b0c03e2SAlistair Francis static irqreturn_t cyttsp5_handle_irq(int irq, void *handle) 651*5b0c03e2SAlistair Francis { 652*5b0c03e2SAlistair Francis struct cyttsp5 *ts = handle; 653*5b0c03e2SAlistair Francis int report_id; 654*5b0c03e2SAlistair Francis int size; 655*5b0c03e2SAlistair Francis int error; 656*5b0c03e2SAlistair Francis 657*5b0c03e2SAlistair Francis error = cyttsp5_read(ts, ts->input_buf, CY_MAX_INPUT); 658*5b0c03e2SAlistair Francis if (error) 659*5b0c03e2SAlistair Francis return IRQ_HANDLED; 660*5b0c03e2SAlistair Francis 661*5b0c03e2SAlistair Francis size = get_unaligned_le16(&ts->input_buf[0]); 662*5b0c03e2SAlistair Francis if (size == 0) { 663*5b0c03e2SAlistair Francis /* reset */ 664*5b0c03e2SAlistair Francis report_id = 0; 665*5b0c03e2SAlistair Francis size = 2; 666*5b0c03e2SAlistair Francis } else { 667*5b0c03e2SAlistair Francis report_id = ts->input_buf[2]; 668*5b0c03e2SAlistair Francis } 669*5b0c03e2SAlistair Francis 670*5b0c03e2SAlistair Francis switch (report_id) { 671*5b0c03e2SAlistair Francis case HID_TOUCH_REPORT_ID: 672*5b0c03e2SAlistair Francis cyttsp5_mt_attention(ts->dev); 673*5b0c03e2SAlistair Francis break; 674*5b0c03e2SAlistair Francis case HID_BTN_REPORT_ID: 675*5b0c03e2SAlistair Francis cyttsp5_btn_attention(ts->dev); 676*5b0c03e2SAlistair Francis break; 677*5b0c03e2SAlistair Francis default: 678*5b0c03e2SAlistair Francis /* It is not an input but a command response */ 679*5b0c03e2SAlistair Francis memcpy(ts->response_buf, ts->input_buf, size); 680*5b0c03e2SAlistair Francis complete(&ts->cmd_done); 681*5b0c03e2SAlistair Francis } 682*5b0c03e2SAlistair Francis 683*5b0c03e2SAlistair Francis return IRQ_HANDLED; 684*5b0c03e2SAlistair Francis } 685*5b0c03e2SAlistair Francis 686*5b0c03e2SAlistair Francis static int cyttsp5_deassert_int(struct cyttsp5 *ts) 687*5b0c03e2SAlistair Francis { 688*5b0c03e2SAlistair Francis u16 size; 689*5b0c03e2SAlistair Francis u8 buf[2]; 690*5b0c03e2SAlistair Francis int error; 691*5b0c03e2SAlistair Francis 692*5b0c03e2SAlistair Francis error = regmap_bulk_read(ts->regmap, HID_INPUT_REG, buf, sizeof(buf)); 693*5b0c03e2SAlistair Francis if (error < 0) 694*5b0c03e2SAlistair Francis return error; 695*5b0c03e2SAlistair Francis 696*5b0c03e2SAlistair Francis size = get_unaligned_le16(&buf[0]); 697*5b0c03e2SAlistair Francis if (size == 2 || size == 0) 698*5b0c03e2SAlistair Francis return 0; 699*5b0c03e2SAlistair Francis 700*5b0c03e2SAlistair Francis return -EINVAL; 701*5b0c03e2SAlistair Francis } 702*5b0c03e2SAlistair Francis 703*5b0c03e2SAlistair Francis static int cyttsp5_fill_all_touch(struct cyttsp5 *ts) 704*5b0c03e2SAlistair Francis { 705*5b0c03e2SAlistair Francis struct cyttsp5_sysinfo *si = &ts->sysinfo; 706*5b0c03e2SAlistair Francis 707*5b0c03e2SAlistair Francis fill_tch_abs(&si->tch_abs[CY_TCH_X], REPORT_SIZE_16, 708*5b0c03e2SAlistair Francis TOUCH_REPORT_DESC_X); 709*5b0c03e2SAlistair Francis fill_tch_abs(&si->tch_abs[CY_TCH_Y], REPORT_SIZE_16, 710*5b0c03e2SAlistair Francis TOUCH_REPORT_DESC_Y); 711*5b0c03e2SAlistair Francis fill_tch_abs(&si->tch_abs[CY_TCH_P], REPORT_SIZE_8, 712*5b0c03e2SAlistair Francis TOUCH_REPORT_DESC_P); 713*5b0c03e2SAlistair Francis fill_tch_abs(&si->tch_abs[CY_TCH_T], REPORT_SIZE_5, 714*5b0c03e2SAlistair Francis TOUCH_REPORT_DESC_CONTACTID); 715*5b0c03e2SAlistair Francis fill_tch_abs(&si->tch_hdr, REPORT_SIZE_5, 716*5b0c03e2SAlistair Francis TOUCH_REPORT_DESC_HDR_CONTACTCOUNT); 717*5b0c03e2SAlistair Francis fill_tch_abs(&si->tch_abs[CY_TCH_MAJ], REPORT_SIZE_8, 718*5b0c03e2SAlistair Francis TOUCH_REPORT_DESC_MAJ); 719*5b0c03e2SAlistair Francis fill_tch_abs(&si->tch_abs[CY_TCH_MIN], REPORT_SIZE_8, 720*5b0c03e2SAlistair Francis TOUCH_REPORT_DESC_MIN); 721*5b0c03e2SAlistair Francis 722*5b0c03e2SAlistair Francis return 0; 723*5b0c03e2SAlistair Francis } 724*5b0c03e2SAlistair Francis 725*5b0c03e2SAlistair Francis static int cyttsp5_startup(struct cyttsp5 *ts) 726*5b0c03e2SAlistair Francis { 727*5b0c03e2SAlistair Francis int error; 728*5b0c03e2SAlistair Francis 729*5b0c03e2SAlistair Francis error = cyttsp5_deassert_int(ts); 730*5b0c03e2SAlistair Francis if (error) { 731*5b0c03e2SAlistair Francis dev_err(ts->dev, "Error on deassert int r=%d\n", error); 732*5b0c03e2SAlistair Francis return -ENODEV; 733*5b0c03e2SAlistair Francis } 734*5b0c03e2SAlistair Francis 735*5b0c03e2SAlistair Francis /* 736*5b0c03e2SAlistair Francis * Launch the application as the device starts in bootloader mode 737*5b0c03e2SAlistair Francis * because of a power-on-reset 738*5b0c03e2SAlistair Francis */ 739*5b0c03e2SAlistair Francis error = cyttsp5_hid_output_bl_launch_app(ts); 740*5b0c03e2SAlistair Francis if (error < 0) { 741*5b0c03e2SAlistair Francis dev_err(ts->dev, "Error on launch app r=%d\n", error); 742*5b0c03e2SAlistair Francis return error; 743*5b0c03e2SAlistair Francis } 744*5b0c03e2SAlistair Francis 745*5b0c03e2SAlistair Francis error = cyttsp5_get_hid_descriptor(ts, &ts->hid_desc); 746*5b0c03e2SAlistair Francis if (error < 0) { 747*5b0c03e2SAlistair Francis dev_err(ts->dev, "Error on getting HID descriptor r=%d\n", error); 748*5b0c03e2SAlistair Francis return error; 749*5b0c03e2SAlistair Francis } 750*5b0c03e2SAlistair Francis 751*5b0c03e2SAlistair Francis error = cyttsp5_fill_all_touch(ts); 752*5b0c03e2SAlistair Francis if (error < 0) { 753*5b0c03e2SAlistair Francis dev_err(ts->dev, "Error on report descriptor r=%d\n", error); 754*5b0c03e2SAlistair Francis return error; 755*5b0c03e2SAlistair Francis } 756*5b0c03e2SAlistair Francis 757*5b0c03e2SAlistair Francis error = cyttsp5_hid_output_get_sysinfo(ts); 758*5b0c03e2SAlistair Francis if (error) { 759*5b0c03e2SAlistair Francis dev_err(ts->dev, "Error on getting sysinfo r=%d\n", error); 760*5b0c03e2SAlistair Francis return error; 761*5b0c03e2SAlistair Francis } 762*5b0c03e2SAlistair Francis 763*5b0c03e2SAlistair Francis return error; 764*5b0c03e2SAlistair Francis } 765*5b0c03e2SAlistair Francis 766*5b0c03e2SAlistair Francis static void cyttsp5_cleanup(void *data) 767*5b0c03e2SAlistair Francis { 768*5b0c03e2SAlistair Francis struct cyttsp5 *ts = data; 769*5b0c03e2SAlistair Francis 770*5b0c03e2SAlistair Francis regulator_disable(ts->vdd); 771*5b0c03e2SAlistair Francis } 772*5b0c03e2SAlistair Francis 773*5b0c03e2SAlistair Francis static int cyttsp5_probe(struct device *dev, struct regmap *regmap, int irq, 774*5b0c03e2SAlistair Francis const char *name) 775*5b0c03e2SAlistair Francis { 776*5b0c03e2SAlistair Francis struct cyttsp5 *ts; 777*5b0c03e2SAlistair Francis struct cyttsp5_sysinfo *si; 778*5b0c03e2SAlistair Francis int error, i; 779*5b0c03e2SAlistair Francis 780*5b0c03e2SAlistair Francis ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL); 781*5b0c03e2SAlistair Francis if (!ts) 782*5b0c03e2SAlistair Francis return -ENOMEM; 783*5b0c03e2SAlistair Francis 784*5b0c03e2SAlistair Francis /* Initialize device info */ 785*5b0c03e2SAlistair Francis ts->regmap = regmap; 786*5b0c03e2SAlistair Francis ts->dev = dev; 787*5b0c03e2SAlistair Francis si = &ts->sysinfo; 788*5b0c03e2SAlistair Francis dev_set_drvdata(dev, ts); 789*5b0c03e2SAlistair Francis 790*5b0c03e2SAlistair Francis init_completion(&ts->cmd_done); 791*5b0c03e2SAlistair Francis 792*5b0c03e2SAlistair Francis /* Power up the device */ 793*5b0c03e2SAlistair Francis ts->vdd = devm_regulator_get(dev, "vdd"); 794*5b0c03e2SAlistair Francis if (IS_ERR(ts->vdd)) { 795*5b0c03e2SAlistair Francis error = PTR_ERR(ts->vdd); 796*5b0c03e2SAlistair Francis return error; 797*5b0c03e2SAlistair Francis } 798*5b0c03e2SAlistair Francis 799*5b0c03e2SAlistair Francis error = devm_add_action_or_reset(dev, cyttsp5_cleanup, ts); 800*5b0c03e2SAlistair Francis if (error) 801*5b0c03e2SAlistair Francis return error; 802*5b0c03e2SAlistair Francis 803*5b0c03e2SAlistair Francis error = regulator_enable(ts->vdd); 804*5b0c03e2SAlistair Francis if (error) 805*5b0c03e2SAlistair Francis return error; 806*5b0c03e2SAlistair Francis 807*5b0c03e2SAlistair Francis ts->input = devm_input_allocate_device(dev); 808*5b0c03e2SAlistair Francis if (!ts->input) { 809*5b0c03e2SAlistair Francis dev_err(dev, "Error, failed to allocate input device\n"); 810*5b0c03e2SAlistair Francis return -ENODEV; 811*5b0c03e2SAlistair Francis } 812*5b0c03e2SAlistair Francis 813*5b0c03e2SAlistair Francis ts->input->name = "cyttsp5"; 814*5b0c03e2SAlistair Francis scnprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(dev)); 815*5b0c03e2SAlistair Francis ts->input->phys = ts->phys; 816*5b0c03e2SAlistair Francis input_set_drvdata(ts->input, ts); 817*5b0c03e2SAlistair Francis 818*5b0c03e2SAlistair Francis /* Reset the gpio to be in a reset state */ 819*5b0c03e2SAlistair Francis ts->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); 820*5b0c03e2SAlistair Francis if (IS_ERR(ts->reset_gpio)) { 821*5b0c03e2SAlistair Francis error = PTR_ERR(ts->reset_gpio); 822*5b0c03e2SAlistair Francis dev_err(dev, "Failed to request reset gpio, error %d\n", error); 823*5b0c03e2SAlistair Francis return error; 824*5b0c03e2SAlistair Francis } 825*5b0c03e2SAlistair Francis gpiod_set_value_cansleep(ts->reset_gpio, 0); 826*5b0c03e2SAlistair Francis 827*5b0c03e2SAlistair Francis /* Need a delay to have device up */ 828*5b0c03e2SAlistair Francis msleep(20); 829*5b0c03e2SAlistair Francis 830*5b0c03e2SAlistair Francis error = devm_request_threaded_irq(dev, irq, NULL, cyttsp5_handle_irq, 831*5b0c03e2SAlistair Francis IRQF_ONESHOT, name, ts); 832*5b0c03e2SAlistair Francis if (error) { 833*5b0c03e2SAlistair Francis dev_err(dev, "unable to request IRQ\n"); 834*5b0c03e2SAlistair Francis return error; 835*5b0c03e2SAlistair Francis } 836*5b0c03e2SAlistair Francis 837*5b0c03e2SAlistair Francis error = cyttsp5_startup(ts); 838*5b0c03e2SAlistair Francis if (error) { 839*5b0c03e2SAlistair Francis dev_err(ts->dev, "Fail initial startup r=%d\n", error); 840*5b0c03e2SAlistair Francis return error; 841*5b0c03e2SAlistair Francis } 842*5b0c03e2SAlistair Francis 843*5b0c03e2SAlistair Francis error = cyttsp5_parse_dt_key_code(dev); 844*5b0c03e2SAlistair Francis if (error < 0) { 845*5b0c03e2SAlistair Francis dev_err(ts->dev, "Error while parsing dts %d\n", error); 846*5b0c03e2SAlistair Francis return error; 847*5b0c03e2SAlistair Francis } 848*5b0c03e2SAlistair Francis 849*5b0c03e2SAlistair Francis touchscreen_parse_properties(ts->input, true, &ts->prop); 850*5b0c03e2SAlistair Francis 851*5b0c03e2SAlistair Francis __set_bit(EV_KEY, ts->input->evbit); 852*5b0c03e2SAlistair Francis for (i = 0; i < si->num_btns; i++) 853*5b0c03e2SAlistair Francis __set_bit(si->key_code[i], ts->input->keybit); 854*5b0c03e2SAlistair Francis 855*5b0c03e2SAlistair Francis return cyttsp5_setup_input_device(dev); 856*5b0c03e2SAlistair Francis } 857*5b0c03e2SAlistair Francis 858*5b0c03e2SAlistair Francis static int cyttsp5_i2c_probe(struct i2c_client *client, 859*5b0c03e2SAlistair Francis const struct i2c_device_id *id) 860*5b0c03e2SAlistair Francis { 861*5b0c03e2SAlistair Francis struct regmap *regmap; 862*5b0c03e2SAlistair Francis static const struct regmap_config config = { 863*5b0c03e2SAlistair Francis .reg_bits = 8, 864*5b0c03e2SAlistair Francis .val_bits = 8, 865*5b0c03e2SAlistair Francis }; 866*5b0c03e2SAlistair Francis 867*5b0c03e2SAlistair Francis regmap = devm_regmap_init_i2c(client, &config); 868*5b0c03e2SAlistair Francis if (IS_ERR(regmap)) { 869*5b0c03e2SAlistair Francis dev_err(&client->dev, "regmap allocation failed: %ld\n", 870*5b0c03e2SAlistair Francis PTR_ERR(regmap)); 871*5b0c03e2SAlistair Francis return PTR_ERR(regmap); 872*5b0c03e2SAlistair Francis } 873*5b0c03e2SAlistair Francis 874*5b0c03e2SAlistair Francis return cyttsp5_probe(&client->dev, regmap, client->irq, client->name); 875*5b0c03e2SAlistair Francis } 876*5b0c03e2SAlistair Francis 877*5b0c03e2SAlistair Francis static const struct of_device_id cyttsp5_of_match[] = { 878*5b0c03e2SAlistair Francis { .compatible = "cypress,tt21000", }, 879*5b0c03e2SAlistair Francis { } 880*5b0c03e2SAlistair Francis }; 881*5b0c03e2SAlistair Francis MODULE_DEVICE_TABLE(of, cyttsp5_of_match); 882*5b0c03e2SAlistair Francis 883*5b0c03e2SAlistair Francis static const struct i2c_device_id cyttsp5_i2c_id[] = { 884*5b0c03e2SAlistair Francis { CYTTSP5_NAME, 0, }, 885*5b0c03e2SAlistair Francis { } 886*5b0c03e2SAlistair Francis }; 887*5b0c03e2SAlistair Francis MODULE_DEVICE_TABLE(i2c, cyttsp5_i2c_id); 888*5b0c03e2SAlistair Francis 889*5b0c03e2SAlistair Francis static struct i2c_driver cyttsp5_i2c_driver = { 890*5b0c03e2SAlistair Francis .driver = { 891*5b0c03e2SAlistair Francis .name = CYTTSP5_NAME, 892*5b0c03e2SAlistair Francis .of_match_table = cyttsp5_of_match, 893*5b0c03e2SAlistair Francis }, 894*5b0c03e2SAlistair Francis .probe = cyttsp5_i2c_probe, 895*5b0c03e2SAlistair Francis .id_table = cyttsp5_i2c_id, 896*5b0c03e2SAlistair Francis }; 897*5b0c03e2SAlistair Francis module_i2c_driver(cyttsp5_i2c_driver); 898*5b0c03e2SAlistair Francis 899*5b0c03e2SAlistair Francis MODULE_LICENSE("GPL"); 900*5b0c03e2SAlistair Francis MODULE_DESCRIPTION("Touchscreen driver for Cypress TrueTouch Gen 5 Product"); 901*5b0c03e2SAlistair Francis MODULE_AUTHOR("Mylène Josserand <mylene.josserand@bootlin.com>"); 902