| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Alistair Francis | 4045 | 90.11% | 1 | 12.50% |
| Maximilian Weigand | 369 | 8.22% | 2 | 25.00% |
| Lin, Meng-Bo | 68 | 1.51% | 1 | 12.50% |
| hrdl | 3 | 0.07% | 1 | 12.50% |
| Rob Herring | 2 | 0.04% | 1 | 12.50% |
| Uwe Kleine-König | 1 | 0.02% | 1 | 12.50% |
| Richard Kjerstadius | 1 | 0.02% | 1 | 12.50% |
| Total | 4489 | 8 |
// SPDX-License-Identifier: GPL-2.0 /* * Parade TrueTouch(TM) Standard Product V5 Module. * * Copyright (C) 2015 Parade Technologies * Copyright (C) 2012-2015 Cypress Semiconductor * Copyright (C) 2018 Bootlin * * Authors: Mylène Josserand <mylene.josserand@bootlin.com> * Alistair Francis <alistair@alistair23.me> */ #include <linux/crc-itu-t.h> #include <linux/delay.h> #include <linux/device.h> #include <linux/gpio/consumer.h> #include <linux/input/mt.h> #include <linux/input/touchscreen.h> #include <linux/interrupt.h> #include <linux/i2c.h> #include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/regmap.h> #include <asm/unaligned.h> #define CYTTSP5_NAME "cyttsp5" #define CY_I2C_DATA_SIZE (2 * 256) #define HID_VERSION 0x0100 #define CY_MAX_INPUT 512 #define CYTTSP5_PREALLOCATED_CMD_BUFFER 32 #define CY_BITS_PER_BTN 1 #define CY_NUM_BTN_EVENT_ID GENMASK(CY_BITS_PER_BTN - 1, 0) #define MAX_AREA 255 #define HID_OUTPUT_BL_SOP 0x1 #define HID_OUTPUT_BL_EOP 0x17 #define HID_OUTPUT_BL_LAUNCH_APP 0x3B #define HID_OUTPUT_BL_LAUNCH_APP_SIZE 11 #define HID_OUTPUT_GET_SYSINFO 0x2 #define HID_OUTPUT_GET_SYSINFO_SIZE 5 #define HID_OUTPUT_MAX_CMD_SIZE 12 #define HID_DESC_REG 0x1 #define HID_INPUT_REG 0x3 #define HID_OUTPUT_REG 0x4 #define HID_COMMAND_REG 0x5 #define REPORT_ID_TOUCH 0x1 #define REPORT_ID_BTN 0x3 #define REPORT_SIZE_5 5 #define REPORT_SIZE_8 8 #define REPORT_SIZE_16 16 /* Touch reports offsets */ /* Header offsets */ #define TOUCH_REPORT_DESC_HDR_CONTACTCOUNT 16 /* Record offsets */ #define TOUCH_REPORT_DESC_CONTACTID 8 #define TOUCH_REPORT_DESC_X 16 #define TOUCH_REPORT_DESC_Y 32 #define TOUCH_REPORT_DESC_P 48 #define TOUCH_REPORT_DESC_MAJ 56 #define TOUCH_REPORT_DESC_MIN 64 /* HID */ #define HID_TOUCH_REPORT_ID 0x1 #define HID_BTN_REPORT_ID 0x3 #define HID_APP_RESPONSE_REPORT_ID 0x1F #define HID_APP_OUTPUT_REPORT_ID 0x2F #define HID_BL_RESPONSE_REPORT_ID 0x30 #define HID_BL_OUTPUT_REPORT_ID 0x40 #define HID_RESPONSE_REPORT_ID 0xF0 #define HID_OUTPUT_RESPONSE_REPORT_OFFSET 2 #define HID_OUTPUT_RESPONSE_CMD_OFFSET 4 #define HID_OUTPUT_RESPONSE_CMD_MASK GENMASK(6, 0) #define HID_SYSINFO_SENSING_OFFSET 33 #define HID_SYSINFO_BTN_OFFSET 48 #define HID_SYSINFO_BTN_MASK GENMASK(7, 0) #define HID_SYSINFO_MAX_BTN 8 #define HID_CMD_SET_POWER 0x8 #define HID_POWER_ON 0x0 #define HID_POWER_SLEEP 0x1 #define CY_HID_OUTPUT_TIMEOUT_MS 200 #define CY_HID_OUTPUT_GET_SYSINFO_TIMEOUT_MS 3000 #define CY_HID_GET_HID_DESCRIPTOR_TIMEOUT_MS 4000 #define CY_HID_SET_POWER_TIMEOUT 500 /* maximum number of concurrent tracks */ #define TOUCH_REPORT_SIZE 10 #define TOUCH_INPUT_HEADER_SIZE 7 #define BTN_REPORT_SIZE 9 #define BTN_INPUT_HEADER_SIZE 5 #define MAX_CY_TCH_T_IDS 32 /* All usage pages for Touch Report */ #define TOUCH_REPORT_USAGE_PG_X 0x00010030 #define TOUCH_REPORT_USAGE_PG_Y 0x00010031 #define TOUCH_REPORT_USAGE_PG_P 0x000D0030 #define TOUCH_REPORT_USAGE_PG_CONTACTID 0x000D0051 #define TOUCH_REPORT_USAGE_PG_CONTACTCOUNT 0x000D0054 #define TOUCH_REPORT_USAGE_PG_MAJ 0xFF010062 #define TOUCH_REPORT_USAGE_PG_MIN 0xFF010063 #define TOUCH_COL_USAGE_PG 0x000D0022 #define SET_CMD_LOW(byte, bits) \ ((byte) = (((byte) & 0xF0) | ((bits) & 0x0F))) #define SET_CMD_HIGH(byte, bits)\ ((byte) = (((byte) & 0x0F) | ((bits) & 0xF0))) #define SET_CMD_OPCODE(byte, opcode) SET_CMD_LOW(byte, opcode) #define SET_CMD_REPORT_TYPE(byte, type) SET_CMD_HIGH(byte, ((type) << 4)) #define SET_CMD_REPORT_ID(byte, id) SET_CMD_LOW(byte, id) /* System Information interface definitions */ struct cyttsp5_sensing_conf_data_dev { u8 electrodes_x; u8 electrodes_y; __le16 len_x; __le16 len_y; __le16 res_x; __le16 res_y; __le16 max_z; u8 origin_x; u8 origin_y; u8 panel_id; u8 btn; u8 scan_mode; u8 max_num_of_tch_per_refresh_cycle; } __packed; struct cyttsp5_sensing_conf_data { u16 res_x; u16 res_y; u16 max_z; u16 len_x; u16 len_y; u8 origin_x; u8 origin_y; u8 max_tch; }; enum cyttsp5_tch_abs { /* for ordering within the extracted touch data array */ CY_TCH_X, /* X */ CY_TCH_Y, /* Y */ CY_TCH_P, /* P (Z) */ CY_TCH_T, /* TOUCH ID */ CY_TCH_MAJ, /* TOUCH_MAJOR */ CY_TCH_MIN, /* TOUCH_MINOR */ CY_TCH_NUM_ABS }; struct cyttsp5_tch_abs_params { size_t ofs; /* abs byte offset */ size_t size; /* size in bits */ size_t min; /* min value */ size_t max; /* max value */ size_t bofs; /* bit offset */ }; struct cyttsp5_touch { int abs[CY_TCH_NUM_ABS]; }; struct cyttsp5_sysinfo { struct cyttsp5_sensing_conf_data sensing_conf_data; int num_btns; struct cyttsp5_tch_abs_params tch_hdr; struct cyttsp5_tch_abs_params tch_abs[CY_TCH_NUM_ABS]; u32 key_code[HID_SYSINFO_MAX_BTN]; }; struct cyttsp5_hid_desc { __le16 hid_desc_len; u8 packet_id; u8 reserved_byte; __le16 bcd_version; __le16 report_desc_len; __le16 report_desc_register; __le16 input_register; __le16 max_input_len; __le16 output_register; __le16 max_output_len; __le16 command_register; __le16 data_register; __le16 vendor_id; __le16 product_id; __le16 version_id; u8 reserved[4]; } __packed; struct cyttsp5 { struct device *dev; struct completion cmd_done; struct cyttsp5_sysinfo sysinfo; struct cyttsp5_hid_desc hid_desc; u8 cmd_buf[CYTTSP5_PREALLOCATED_CMD_BUFFER]; u8 input_buf[CY_MAX_INPUT]; u8 response_buf[CY_MAX_INPUT]; struct gpio_desc *reset_gpio; struct input_dev *input; char phys[NAME_MAX]; int num_prv_rec; struct regmap *regmap; struct touchscreen_properties prop; struct regulator_bulk_data supplies[2]; }; /* * For what is understood in the datasheet, the register does not * matter. For consistency, use the Input Register address * but it does mean anything to the device. The important data * to send is the I2C address */ static int cyttsp5_read(struct cyttsp5 *ts, u8 *buf, u32 max) { int error; u32 size; u8 temp[2]; /* Read the frame to retrieve the size */ error = regmap_bulk_read(ts->regmap, HID_INPUT_REG, temp, sizeof(temp)); if (error) return error; size = get_unaligned_le16(temp); if (!size || size == 2) return 0; if (size > max) return -EINVAL; /* Get the real value */ return regmap_bulk_read(ts->regmap, HID_INPUT_REG, buf, size); } static int cyttsp5_write(struct cyttsp5 *ts, unsigned int reg, u8 *data, size_t size) { u8 cmd[HID_OUTPUT_MAX_CMD_SIZE]; if (size + 1 > HID_OUTPUT_MAX_CMD_SIZE) return -E2BIG; /* High bytes of register address needed as first byte of cmd */ cmd[0] = (reg >> 8) & 0xFF; /* Copy the rest of the data */ if (data) memcpy(&cmd[1], data, size); /* * The hardware wants to receive a frame with the address register * contained in the first two bytes. As the regmap_write function * add the register adresse in the frame, we use the low byte as * first frame byte for the address register and the first * data byte is the high register + left of the cmd to send */ return regmap_bulk_write(ts->regmap, reg & 0xFF, cmd, size + 1); } static void cyttsp5_get_touch_axis(int *axis, int size, int max, u8 *xy_data, int bofs) { int nbyte; for (nbyte = 0, *axis = 0; nbyte < size; nbyte++) *axis += ((xy_data[nbyte] >> bofs) << (nbyte * 8)); *axis &= max - 1; } static void cyttsp5_get_touch_record(struct cyttsp5 *ts, struct cyttsp5_touch *touch, u8 *xy_data) { struct cyttsp5_sysinfo *si = &ts->sysinfo; enum cyttsp5_tch_abs abs; for (abs = CY_TCH_X; abs < CY_TCH_NUM_ABS; abs++) cyttsp5_get_touch_axis(&touch->abs[abs], si->tch_abs[abs].size, si->tch_abs[abs].max, xy_data + si->tch_abs[abs].ofs, si->tch_abs[abs].bofs); } static void cyttsp5_get_mt_touches(struct cyttsp5 *ts, struct cyttsp5_touch *tch, int num_cur_tch) { struct cyttsp5_sysinfo *si = &ts->sysinfo; int i, t = 0, offset = 0; DECLARE_BITMAP(ids, MAX_CY_TCH_T_IDS); u8 *tch_addr; int tmp; bitmap_zero(ids, MAX_CY_TCH_T_IDS); memset(tch->abs, 0, sizeof(tch->abs)); switch (ts->input_buf[2]) { case HID_TOUCH_REPORT_ID: offset = TOUCH_INPUT_HEADER_SIZE; break; case HID_BTN_REPORT_ID: offset = BTN_INPUT_HEADER_SIZE; break; } for (i = 0; i < num_cur_tch; i++) { tch_addr = ts->input_buf + offset + (i * TOUCH_REPORT_SIZE); cyttsp5_get_touch_record(ts, tch, tch_addr); /* Convert MAJOR/MINOR from mm to resolution */ tmp = tch->abs[CY_TCH_MAJ] * 100 * si->sensing_conf_data.res_x; tch->abs[CY_TCH_MAJ] = tmp / si->sensing_conf_data.len_x; tmp = tch->abs[CY_TCH_MIN] * 100 * si->sensing_conf_data.res_x; tch->abs[CY_TCH_MIN] = tmp / si->sensing_conf_data.len_x; t = tch->abs[CY_TCH_T]; input_mt_slot(ts->input, t); input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, true); __set_bit(t, ids); /* position and pressure fields */ touchscreen_report_pos(ts->input, &ts->prop, tch->abs[CY_TCH_X], tch->abs[CY_TCH_Y], true); input_report_abs(ts->input, ABS_MT_PRESSURE, tch->abs[CY_TCH_P]); /* Get the extended touch fields */ input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, tch->abs[CY_TCH_MAJ]); input_report_abs(ts->input, ABS_MT_TOUCH_MINOR, tch->abs[CY_TCH_MIN]); } ts->num_prv_rec = num_cur_tch; } static int cyttsp5_mt_attention(struct device *dev) { struct cyttsp5 *ts = dev_get_drvdata(dev); struct cyttsp5_sysinfo *si = &ts->sysinfo; int max_tch = si->sensing_conf_data.max_tch; struct cyttsp5_touch tch; int num_cur_tch; cyttsp5_get_touch_axis(&num_cur_tch, si->tch_hdr.size, si->tch_hdr.max, ts->input_buf + 3 + si->tch_hdr.ofs, si->tch_hdr.bofs); if (num_cur_tch > max_tch) { dev_err(dev, "Num touch err detected (n=%d)\n", num_cur_tch); num_cur_tch = max_tch; } if (num_cur_tch == 0 && ts->num_prv_rec == 0) return 0; /* extract xy_data for all currently reported touches */ if (num_cur_tch) cyttsp5_get_mt_touches(ts, &tch, num_cur_tch); input_mt_sync_frame(ts->input); input_sync(ts->input); return 0; } static int cyttsp5_setup_input_device(struct device *dev) { struct cyttsp5 *ts = dev_get_drvdata(dev); struct cyttsp5_sysinfo *si = &ts->sysinfo; int max_x, max_y, max_p; int max_x_tmp, max_y_tmp; int error; max_x_tmp = si->sensing_conf_data.res_x; max_y_tmp = si->sensing_conf_data.res_y; max_x = max_x_tmp - 1; max_y = max_y_tmp - 1; max_p = si->sensing_conf_data.max_z; input_set_abs_params(ts->input, ABS_MT_POSITION_X, 0, max_x, 0, 0); input_set_abs_params(ts->input, ABS_MT_POSITION_Y, 0, max_y, 0, 0); input_set_abs_params(ts->input, ABS_MT_PRESSURE, 0, max_p, 0, 0); input_set_abs_params(ts->input, ABS_MT_TOUCH_MAJOR, 0, MAX_AREA, 0, 0); input_set_abs_params(ts->input, ABS_MT_TOUCH_MINOR, 0, MAX_AREA, 0, 0); error = input_mt_init_slots(ts->input, si->tch_abs[CY_TCH_T].max, INPUT_MT_DROP_UNUSED | INPUT_MT_DIRECT); if (error) return error; error = input_register_device(ts->input); if (error) { dev_err(dev, "failed to register input device: %d\n", error); return error; } return error; } static int cyttsp5_parse_dt_key_code(struct device *dev) { struct cyttsp5 *ts = dev_get_drvdata(dev); struct cyttsp5_sysinfo *si = &ts->sysinfo; if (!si->num_btns) return 0; /* Initialize the button to RESERVED */ memset32(si->key_code, KEY_RESERVED, si->num_btns); return device_property_read_u32_array(dev, "linux,keycodes", si->key_code, si->num_btns); } static int cyttsp5_btn_attention(struct device *dev) { struct cyttsp5 *ts = dev_get_drvdata(dev); struct cyttsp5_sysinfo *si = &ts->sysinfo; int cur_btn, offset = 0; int cur_btn_state; switch (ts->input_buf[2]) { case HID_TOUCH_REPORT_ID: offset = TOUCH_INPUT_HEADER_SIZE; break; case HID_BTN_REPORT_ID: offset = BTN_INPUT_HEADER_SIZE; break; } if (ts->input_buf[2] != HID_BTN_REPORT_ID) return 0; /* extract button press/release touch information */ for (cur_btn = 0; cur_btn < si->num_btns; cur_btn++) { /* Get current button state */ cur_btn_state = (ts->input_buf[offset] >> (cur_btn * CY_BITS_PER_BTN)) & CY_NUM_BTN_EVENT_ID; input_report_key(ts->input, si->key_code[cur_btn], cur_btn_state); input_sync(ts->input); } return 0; } static int cyttsp5_validate_cmd_response(struct cyttsp5 *ts, u8 code) { u16 size, crc; u8 status, report_id; int command_code; size = get_unaligned_le16(&ts->response_buf[0]); if (!size) return 0; report_id = ts->response_buf[HID_OUTPUT_RESPONSE_REPORT_OFFSET]; switch (report_id) { case HID_BL_RESPONSE_REPORT_ID: if (ts->response_buf[4] != HID_OUTPUT_BL_SOP) { dev_err(ts->dev, "HID output response, wrong SOP\n"); return -EPROTO; } if (ts->response_buf[size - 1] != HID_OUTPUT_BL_EOP) { dev_err(ts->dev, "HID output response, wrong EOP\n"); return -EPROTO; } crc = crc_itu_t(0xFFFF, &ts->response_buf[4], size - 7); if (get_unaligned_le16(&ts->response_buf[size - 3]) != crc) { dev_err(ts->dev, "HID output response, wrong CRC 0x%X\n", crc); return -EPROTO; } status = ts->response_buf[5]; if (status) { dev_err(ts->dev, "HID output response, ERROR:%d\n", status); return -EPROTO; } break; case HID_APP_RESPONSE_REPORT_ID: command_code = ts->response_buf[HID_OUTPUT_RESPONSE_CMD_OFFSET] & HID_OUTPUT_RESPONSE_CMD_MASK; if (command_code != code) { dev_err(ts->dev, "HID output response, wrong command_code:%X\n", command_code); return -EPROTO; } break; } return 0; } static void cyttsp5_si_get_btn_data(struct cyttsp5 *ts) { struct cyttsp5_sysinfo *si = &ts->sysinfo; unsigned int btns = ts->response_buf[HID_SYSINFO_BTN_OFFSET] & HID_SYSINFO_BTN_MASK; si->num_btns = hweight8(btns); } static int cyttsp5_get_sysinfo_regs(struct cyttsp5 *ts) { struct cyttsp5_sensing_conf_data *scd = &ts->sysinfo.sensing_conf_data; struct cyttsp5_sensing_conf_data_dev *scd_dev = (struct cyttsp5_sensing_conf_data_dev *) &ts->response_buf[HID_SYSINFO_SENSING_OFFSET]; cyttsp5_si_get_btn_data(ts); scd->max_tch = scd_dev->max_num_of_tch_per_refresh_cycle; scd->res_x = get_unaligned_le16(&scd_dev->res_x); scd->res_y = get_unaligned_le16(&scd_dev->res_y); scd->max_z = get_unaligned_le16(&scd_dev->max_z); scd->len_x = get_unaligned_le16(&scd_dev->len_x); scd->len_y = get_unaligned_le16(&scd_dev->len_y); return 0; } static int cyttsp5_hid_output_get_sysinfo(struct cyttsp5 *ts) { int rc; u8 cmd[HID_OUTPUT_GET_SYSINFO_SIZE]; /* HI bytes of Output register address */ put_unaligned_le16(HID_OUTPUT_GET_SYSINFO_SIZE, cmd); cmd[2] = HID_APP_OUTPUT_REPORT_ID; cmd[3] = 0x0; /* Reserved */ cmd[4] = HID_OUTPUT_GET_SYSINFO; rc = cyttsp5_write(ts, HID_OUTPUT_REG, cmd, HID_OUTPUT_GET_SYSINFO_SIZE); if (rc) { dev_err(ts->dev, "Failed to write command %d", rc); return rc; } rc = wait_for_completion_interruptible_timeout(&ts->cmd_done, msecs_to_jiffies(CY_HID_OUTPUT_GET_SYSINFO_TIMEOUT_MS)); if (rc <= 0) { dev_err(ts->dev, "HID output cmd execution timed out\n"); rc = -ETIMEDOUT; return rc; } rc = cyttsp5_validate_cmd_response(ts, HID_OUTPUT_GET_SYSINFO); if (rc) { dev_err(ts->dev, "Validation of the response failed\n"); return rc; } return cyttsp5_get_sysinfo_regs(ts); } static int cyttsp5_power_control(struct cyttsp5 *ts, bool on) { u8 state = on ? HID_POWER_ON : HID_POWER_SLEEP; u8 cmd[2] = { 0 }; int rc; SET_CMD_REPORT_TYPE(cmd[0], 0); SET_CMD_REPORT_ID(cmd[0], HID_POWER_SLEEP); SET_CMD_OPCODE(cmd[1], HID_CMD_SET_POWER); rc = cyttsp5_write(ts, HID_COMMAND_REG, cmd, sizeof(cmd)); if (rc) { dev_err(ts->dev, "Failed to write power command %d", rc); return rc; } rc = wait_for_completion_interruptible_timeout(&ts->cmd_done, msecs_to_jiffies(CY_HID_SET_POWER_TIMEOUT)); if (rc <= 0) { dev_err(ts->dev, "HID power cmd execution timed out\n"); return -ETIMEDOUT; } if (ts->response_buf[2] != HID_RESPONSE_REPORT_ID || (ts->response_buf[3] & 0x03) != state || (ts->response_buf[4] & 0x0f) != HID_CMD_SET_POWER) { dev_err(ts->dev, "Validation of the %s response failed\n", on ? "wakeup" : "sleep"); return -EINVAL; } return 0; } static int cyttsp5_hid_output_bl_launch_app(struct cyttsp5 *ts) { int rc; u8 cmd[HID_OUTPUT_BL_LAUNCH_APP_SIZE]; u16 crc; put_unaligned_le16(HID_OUTPUT_BL_LAUNCH_APP_SIZE, cmd); cmd[2] = HID_BL_OUTPUT_REPORT_ID; cmd[3] = 0x0; /* Reserved */ cmd[4] = HID_OUTPUT_BL_SOP; cmd[5] = HID_OUTPUT_BL_LAUNCH_APP; put_unaligned_le16(0x00, &cmd[6]); crc = crc_itu_t(0xFFFF, &cmd[4], 4); put_unaligned_le16(crc, &cmd[8]); cmd[10] = HID_OUTPUT_BL_EOP; rc = cyttsp5_write(ts, HID_OUTPUT_REG, cmd, HID_OUTPUT_BL_LAUNCH_APP_SIZE); if (rc) { dev_err(ts->dev, "Failed to write command %d", rc); return rc; } rc = wait_for_completion_interruptible_timeout(&ts->cmd_done, msecs_to_jiffies(CY_HID_OUTPUT_TIMEOUT_MS)); if (rc <= 0) { dev_err(ts->dev, "HID output cmd execution timed out\n"); rc = -ETIMEDOUT; return rc; } rc = cyttsp5_validate_cmd_response(ts, HID_OUTPUT_BL_LAUNCH_APP); if (rc) { dev_err(ts->dev, "Validation of the response failed\n"); return rc; } return 0; } static int cyttsp5_get_hid_descriptor(struct cyttsp5 *ts, struct cyttsp5_hid_desc *desc) { struct device *dev = ts->dev; int rc; rc = cyttsp5_write(ts, HID_DESC_REG, NULL, 0); if (rc) { dev_err(dev, "Failed to get HID descriptor, rc=%d\n", rc); return rc; } rc = wait_for_completion_interruptible_timeout(&ts->cmd_done, msecs_to_jiffies(CY_HID_GET_HID_DESCRIPTOR_TIMEOUT_MS)); if (rc <= 0) { dev_err(ts->dev, "HID get descriptor timed out\n"); rc = -ETIMEDOUT; return rc; } memcpy(desc, ts->response_buf, sizeof(*desc)); /* Check HID descriptor length and version */ if (le16_to_cpu(desc->hid_desc_len) != sizeof(*desc) || le16_to_cpu(desc->bcd_version) != HID_VERSION) { dev_err(dev, "Unsupported HID version\n"); return -ENODEV; } return 0; } static int fill_tch_abs(struct cyttsp5_tch_abs_params *tch_abs, int report_size, int offset) { tch_abs->ofs = offset / 8; tch_abs->size = report_size / 8; if (report_size % 8) tch_abs->size += 1; tch_abs->min = 0; tch_abs->max = 1 << report_size; tch_abs->bofs = offset - (tch_abs->ofs << 3); return 0; } static irqreturn_t cyttsp5_handle_irq(int irq, void *handle) { struct cyttsp5 *ts = handle; int report_id; int size; int error; error = cyttsp5_read(ts, ts->input_buf, CY_MAX_INPUT); if (error) return IRQ_HANDLED; size = get_unaligned_le16(&ts->input_buf[0]); if (size == 0) { /* reset */ report_id = 0; size = 2; } else { report_id = ts->input_buf[2]; } switch (report_id) { case HID_TOUCH_REPORT_ID: cyttsp5_mt_attention(ts->dev); break; case HID_BTN_REPORT_ID: cyttsp5_btn_attention(ts->dev); break; case HID_RESPONSE_REPORT_ID: memcpy(ts->response_buf, ts->input_buf, size); complete(&ts->cmd_done); break; default: /* It is not an input but a command response */ memcpy(ts->response_buf, ts->input_buf, size); complete(&ts->cmd_done); } return IRQ_HANDLED; } static int cyttsp5_deassert_int(struct cyttsp5 *ts) { u16 size; u8 buf[2]; int error; error = regmap_bulk_read(ts->regmap, HID_INPUT_REG, buf, sizeof(buf)); if (error < 0) return error; size = get_unaligned_le16(&buf[0]); if (size == 2 || size == 0) return 0; return -EINVAL; } static int cyttsp5_fill_all_touch(struct cyttsp5 *ts) { struct cyttsp5_sysinfo *si = &ts->sysinfo; fill_tch_abs(&si->tch_abs[CY_TCH_X], REPORT_SIZE_16, TOUCH_REPORT_DESC_X); fill_tch_abs(&si->tch_abs[CY_TCH_Y], REPORT_SIZE_16, TOUCH_REPORT_DESC_Y); fill_tch_abs(&si->tch_abs[CY_TCH_P], REPORT_SIZE_8, TOUCH_REPORT_DESC_P); fill_tch_abs(&si->tch_abs[CY_TCH_T], REPORT_SIZE_5, TOUCH_REPORT_DESC_CONTACTID); fill_tch_abs(&si->tch_hdr, REPORT_SIZE_5, TOUCH_REPORT_DESC_HDR_CONTACTCOUNT); fill_tch_abs(&si->tch_abs[CY_TCH_MAJ], REPORT_SIZE_8, TOUCH_REPORT_DESC_MAJ); fill_tch_abs(&si->tch_abs[CY_TCH_MIN], REPORT_SIZE_8, TOUCH_REPORT_DESC_MIN); return 0; } static int cyttsp5_startup(struct cyttsp5 *ts) { int error; error = cyttsp5_deassert_int(ts); if (error) { dev_err(ts->dev, "Error on deassert int r=%d\n", error); return -ENODEV; } /* * Launch the application as the device starts in bootloader mode * because of a power-on-reset */ error = cyttsp5_hid_output_bl_launch_app(ts); if (error < 0) { dev_err(ts->dev, "Error on launch app r=%d\n", error); return error; } error = cyttsp5_get_hid_descriptor(ts, &ts->hid_desc); if (error < 0) { dev_err(ts->dev, "Error on getting HID descriptor r=%d\n", error); return error; } error = cyttsp5_fill_all_touch(ts); if (error < 0) { dev_err(ts->dev, "Error on report descriptor r=%d\n", error); return error; } error = cyttsp5_hid_output_get_sysinfo(ts); if (error) { dev_err(ts->dev, "Error on getting sysinfo r=%d\n", error); return error; } return error; } static void cyttsp5_cleanup(void *data) { struct cyttsp5 *ts = data; regulator_bulk_disable(ARRAY_SIZE(ts->supplies), ts->supplies); } static int cyttsp5_probe(struct device *dev, struct regmap *regmap, int irq, const char *name) { struct cyttsp5 *ts; struct cyttsp5_sysinfo *si; int error, i; ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL); if (!ts) return -ENOMEM; /* Initialize device info */ ts->regmap = regmap; ts->dev = dev; si = &ts->sysinfo; dev_set_drvdata(dev, ts); init_completion(&ts->cmd_done); /* Power up the device */ ts->supplies[0].supply = "vdd"; ts->supplies[1].supply = "vddio"; error = devm_regulator_bulk_get(dev, ARRAY_SIZE(ts->supplies), ts->supplies); if (error) { dev_err(ts->dev, "Failed to get regulators, error %d\n", error); return error; } error = devm_add_action_or_reset(dev, cyttsp5_cleanup, ts); if (error) return error; error = regulator_bulk_enable(ARRAY_SIZE(ts->supplies), ts->supplies); if (error) { dev_err(ts->dev, "Failed to enable regulators, error %d\n", error); return error; } ts->input = devm_input_allocate_device(dev); if (!ts->input) { dev_err(dev, "Error, failed to allocate input device\n"); return -ENODEV; } ts->input->name = "cyttsp5"; scnprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(dev)); ts->input->phys = ts->phys; input_set_drvdata(ts->input, ts); /* Reset the gpio to be in a reset state */ ts->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); if (IS_ERR(ts->reset_gpio)) { error = PTR_ERR(ts->reset_gpio); dev_err(dev, "Failed to request reset gpio, error %d\n", error); return error; } gpiod_set_value_cansleep(ts->reset_gpio, 0); /* Need a delay to have device up */ msleep(20); error = devm_request_threaded_irq(dev, irq, NULL, cyttsp5_handle_irq, IRQF_ONESHOT, name, ts); if (error) { dev_err(dev, "unable to request IRQ\n"); return error; } error = cyttsp5_startup(ts); if (error) { dev_err(ts->dev, "Fail initial startup r=%d\n", error); return error; } error = cyttsp5_parse_dt_key_code(dev); if (error < 0) { dev_err(ts->dev, "Error while parsing dts %d\n", error); return error; } touchscreen_parse_properties(ts->input, true, &ts->prop); __set_bit(EV_KEY, ts->input->evbit); for (i = 0; i < si->num_btns; i++) __set_bit(si->key_code[i], ts->input->keybit); return cyttsp5_setup_input_device(dev); } static int cyttsp5_i2c_probe(struct i2c_client *client) { struct regmap *regmap; static const struct regmap_config config = { .reg_bits = 8, .val_bits = 8, }; regmap = devm_regmap_init_i2c(client, &config); if (IS_ERR(regmap)) { dev_err(&client->dev, "regmap allocation failed: %ld\n", PTR_ERR(regmap)); return PTR_ERR(regmap); } return cyttsp5_probe(&client->dev, regmap, client->irq, client->name); } static const struct of_device_id cyttsp5_of_match[] = { { .compatible = "cypress,tt21000", }, { } }; MODULE_DEVICE_TABLE(of, cyttsp5_of_match); static const struct i2c_device_id cyttsp5_i2c_id[] = { { CYTTSP5_NAME, 0, }, { } }; MODULE_DEVICE_TABLE(i2c, cyttsp5_i2c_id); static int __maybe_unused cyttsp5_suspend(struct device *dev) { struct cyttsp5 *ts = dev_get_drvdata(dev); if (!device_may_wakeup(dev)) cyttsp5_power_control(ts, false); return 0; } static int __maybe_unused cyttsp5_resume(struct device *dev) { struct cyttsp5 *ts = dev_get_drvdata(dev); if (!device_may_wakeup(dev)) cyttsp5_power_control(ts, true); return 0; } static SIMPLE_DEV_PM_OPS(cyttsp5_pm, cyttsp5_suspend, cyttsp5_resume); static struct i2c_driver cyttsp5_i2c_driver = { .driver = { .name = CYTTSP5_NAME, .of_match_table = cyttsp5_of_match, .pm = &cyttsp5_pm, }, .probe = cyttsp5_i2c_probe, .id_table = cyttsp5_i2c_id, }; module_i2c_driver(cyttsp5_i2c_driver); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Touchscreen driver for Cypress TrueTouch Gen 5 Product"); MODULE_AUTHOR("Mylène Josserand <mylene.josserand@bootlin.com>");
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