diff options
Diffstat (limited to 'driver/touchpad_gt7288.c')
| -rw-r--r-- | driver/touchpad_gt7288.c | 227 |
1 files changed, 0 insertions, 227 deletions
diff --git a/driver/touchpad_gt7288.c b/driver/touchpad_gt7288.c deleted file mode 100644 index ac05b88323..0000000000 --- a/driver/touchpad_gt7288.c +++ /dev/null @@ -1,227 +0,0 @@ -/* Copyright 2019 The Chromium OS Authors. All rights reserved. - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - */ - -#include <stdbool.h> - -#include "common.h" -#include "console.h" -#include "hooks.h" -#include "i2c.h" -#include "task.h" -#include "touchpad_gt7288.h" -#include "util.h" - -/* Define this to enable various warning messages during report parsing. */ -#undef DEBUG_CHECKS - -#define CPRINTS(format, args...) cprints(CC_TOUCHPAD, format, ## args) - -#define GT7288_I2C_ADDR_FLAGS 0x14 - -#define GT7288_REPORT_ID_PTP 0x04 - -#define GT7288_BUTTON_STATE_UP 0x80 -#define GT7288_BUTTON_STATE_DOWN 0x81 - -#define GT7288_REG_HID_DESCRIPTOR 0x0001 -#define GT7288_REG_REPORT_DESCRIPTOR 0x0002 - -#define GT7288_HID_DESCRIPTOR_LENGTH 0x1E -#define GT7288_REPORT_DESCRIPTOR_LENGTH 0x1AE -#define GT7288_REPORT_LENGTH 16 - -/** - * Reads a descriptor using the Conventional Read Mode. - * - * @param[in] register_id The register containing the descriptor to read. - * @param[out] data The data that is read. - * @param[in] max_length The maximum length of data. - * - * @return EC_SUCCESS or an error code. - */ -static int gt7288_read_desc(uint16_t register_id, uint8_t *data, - size_t max_length) -{ - uint8_t reg_bytes[] = { - register_id & 0xFF, (register_id & 0xFF00) >> 8 - }; - return i2c_xfer(CONFIG_TOUCHPAD_I2C_PORT, GT7288_I2C_ADDR_FLAGS, - reg_bytes, sizeof(reg_bytes), data, max_length); -} - -int gt7288_get_version_info(struct gt7288_version_info *info) -{ - uint8_t data[GT7288_HID_DESCRIPTOR_LENGTH]; - - RETURN_ERROR(gt7288_read_desc(GT7288_REG_HID_DESCRIPTOR, data, - sizeof(data))); - info->product_id = UINT16_FROM_BYTE_ARRAY_LE(data, 22); - info->version_id = UINT16_FROM_BYTE_ARRAY_LE(data, 24); - return EC_SUCCESS; -} - -static void gt7288_translate_contact(const uint8_t *data, - struct gt7288_contact *contact) -{ - if (IS_ENABLED(DEBUG_CHECKS)) { - uint8_t report_id = data[2]; - - if (report_id != GT7288_REPORT_ID_PTP) { - CPRINTS("WARNING: unexpected report ID 0x%02X (expected 0x%02X).", - report_id, GT7288_REPORT_ID_PTP); - } - } - - contact->id = data[3] >> 4; - /* Note: these bits appear to be in the wrong order in the programming - * guide, verified by experimentation. - */ - contact->tip = (data[3] & BIT(1)) >> 1; - contact->confidence = data[3] & BIT(0); - contact->x = UINT16_FROM_BYTE_ARRAY_LE(data, 4); - contact->y = UINT16_FROM_BYTE_ARRAY_LE(data, 6); - contact->width = data[12]; - contact->height = data[13]; -} - -static int gt7288_read(uint8_t *data, size_t max_length) -{ - return i2c_xfer(CONFIG_TOUCHPAD_I2C_PORT, GT7288_I2C_ADDR_FLAGS, - NULL, 0, data, max_length); -} - -int gt7288_read_ptp_report(struct gt7288_ptp_report *report) -{ - size_t i; - uint8_t data[GT7288_REPORT_LENGTH]; - - RETURN_ERROR(gt7288_read(data, sizeof(data))); - report->timestamp = UINT16_FROM_BYTE_ARRAY_LE(data, 8); - - if (data[10] > GT7288_MAX_CONTACTS) { - if (IS_ENABLED(DEBUG_CHECKS)) - CPRINTS("ERROR: too many contacts (%d > %d).", - data[10], GT7288_MAX_CONTACTS); - return EC_ERROR_HW_INTERNAL; - } - report->num_contacts = data[10]; - - if (IS_ENABLED(DEBUG_CHECKS) && data[11] != GT7288_BUTTON_STATE_UP && - data[11] != GT7288_BUTTON_STATE_DOWN) { - CPRINTS("WARNING: unexpected button state 0x%02X (expected 0x%02X or 0x%02X).", - data[11], GT7288_BUTTON_STATE_UP, - GT7288_BUTTON_STATE_DOWN); - } - report->button_down = data[11] == GT7288_BUTTON_STATE_DOWN; - - gt7288_translate_contact(data, &report->contacts[0]); - - for (i = 1; i < report->num_contacts; i++) { - RETURN_ERROR(gt7288_read(data, sizeof(data))); - gt7288_translate_contact(data, &report->contacts[i]); - } - return EC_SUCCESS; -} - -#ifdef CONFIG_CMD_GT7288 -static int command_gt7288_read_desc(int argc, char **argv) -{ - uint16_t register_id; - long parsed_arg; - char *end; - int i; - uint8_t data[GT7288_HID_DESCRIPTOR_LENGTH]; - - if (argc != 2) - return EC_ERROR_PARAM_COUNT; - - parsed_arg = strtoi(argv[1], &end, 0); - if (parsed_arg < 0 || parsed_arg > UINT16_MAX || end == argv[1]) - return EC_ERROR_PARAM1; - register_id = parsed_arg; - - RETURN_ERROR(gt7288_read_desc(register_id, data, sizeof(data))); - - ccprintf("Data: "); - for (i = 0; i < sizeof(data); i++) - ccprintf("%02X ", data[i]); - ccprintf("\n"); - return EC_SUCCESS; -} -DECLARE_CONSOLE_COMMAND(gt7288_desc, command_gt7288_read_desc, - "register", - "Read a descriptor on the GT7288"); - -static int command_gt7288_read_report_descriptor(int argc, char **argv) -{ - int i; - uint8_t data[64]; - size_t bytes_read = 0; - - if (argc != 1) - return EC_ERROR_PARAM_COUNT; - - /* The report descriptor is bigger than the Maxim I2C code can handle in - * one go, so we have to split it into chunks. - */ - RETURN_ERROR(gt7288_read_desc(GT7288_REG_REPORT_DESCRIPTOR, NULL, 0)); - ccprintf("Report descriptor: "); - while (bytes_read < GT7288_REPORT_DESCRIPTOR_LENGTH) { - size_t bytes_to_read = - MIN(GT7288_REPORT_DESCRIPTOR_LENGTH - bytes_read, - sizeof(data)); - RETURN_ERROR(gt7288_read(data, bytes_to_read)); - - for (i = 0; i < sizeof(data); i++) - ccprintf("%02X ", data[i]); - - bytes_read += bytes_to_read; - } - ccprintf("\n"); - return EC_SUCCESS; -} -DECLARE_CONSOLE_COMMAND(gt7288_repdesc, command_gt7288_read_report_descriptor, - "", "Read the report descriptor on the GT7288"); - -static int command_gt7288_ver(int argc, char **argv) -{ - struct gt7288_version_info info; - - if (argc != 1) - return EC_ERROR_PARAM_COUNT; - - RETURN_ERROR(gt7288_get_version_info(&info)); - ccprintf("Product ID: 0x%04X\n", info.product_id); - ccprintf("Version ID: 0x%04X\n", info.version_id); - return EC_SUCCESS; -} -DECLARE_CONSOLE_COMMAND(gt7288_ver, command_gt7288_ver, "", - "Read version information from the GT7288"); - -static int command_gt7288_report(int argc, char **argv) -{ - int i; - struct gt7288_ptp_report report; - - RETURN_ERROR(gt7288_read_ptp_report(&report)); - ccprintf("Timestamp %d, button %s, %d contacts\n", report.timestamp, - report.button_down ? "down" : "up", report.num_contacts); - if (report.num_contacts == 0) - return EC_SUCCESS; - - ccprintf("ID, X, Y, width, height, tip, confidence\n"); - for (i = 0; i < report.num_contacts; i++) { - struct gt7288_contact *contact = &report.contacts[i]; - - ccprintf("%2d, %4d, %4d, %5d, %6d, %3d, %10d\n", contact->id, - contact->x, contact->y, contact->width, - contact->height, contact->tip, contact->confidence); - } - - return EC_SUCCESS; -} -DECLARE_CONSOLE_COMMAND(gt7288_rep, command_gt7288_report, "", - "Read a report from the GT7288."); -#endif /* CONFIG_CMD_GT7288 */ |