diff options
Diffstat (limited to 'drivers/input/mouse/cyapa_gen5.c')
| -rw-r--r-- | drivers/input/mouse/cyapa_gen5.c | 1678 |
1 files changed, 1678 insertions, 0 deletions
diff --git a/drivers/input/mouse/cyapa_gen5.c b/drivers/input/mouse/cyapa_gen5.c new file mode 100644 index 000000000000..a049ae383027 --- /dev/null +++ b/drivers/input/mouse/cyapa_gen5.c @@ -0,0 +1,1678 @@ +/* + * Cypress APA trackpad with I2C interface + * + * Author: Dudley Du <dudl@cypress.com> + * + * Copyright (C) 2014 Cypress Semiconductor, Inc. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive for + * more details. + */ + +#include <linux/delay.h> +#include <linux/i2c.h> +#include <linux/input.h> +#include <linux/input/mt.h> +#include <linux/mutex.h> +#include <linux/completion.h> +#include <linux/slab.h> +#include <linux/unaligned/access_ok.h> +#include "cyapa.h" + + +/* Macro of Gen5 */ +#define RECORD_EVENT_NONE 0 +#define RECORD_EVENT_TOUCHDOWN 1 +#define RECORD_EVENT_DISPLACE 2 +#define RECORD_EVENT_LIFTOFF 3 + +#define CYAPA_TSG_FLASH_MAP_BLOCK_SIZE 0x80 +#define CYAPA_TSG_IMG_FW_HDR_SIZE 13 +#define CYAPA_TSG_FW_ROW_SIZE (CYAPA_TSG_FLASH_MAP_BLOCK_SIZE) +#define CYAPA_TSG_IMG_START_ROW_NUM 0x002e +#define CYAPA_TSG_IMG_END_ROW_NUM 0x01fe +#define CYAPA_TSG_IMG_APP_INTEGRITY_ROW_NUM 0x01ff +#define CYAPA_TSG_IMG_MAX_RECORDS (CYAPA_TSG_IMG_END_ROW_NUM - \ + CYAPA_TSG_IMG_START_ROW_NUM + 1 + 1) +#define CYAPA_TSG_IMG_READ_SIZE (CYAPA_TSG_FLASH_MAP_BLOCK_SIZE / 2) +#define CYAPA_TSG_START_OF_APPLICATION 0x1700 +#define CYAPA_TSG_APP_INTEGRITY_SIZE 60 +#define CYAPA_TSG_FLASH_MAP_METADATA_SIZE 60 +#define CYAPA_TSG_BL_KEY_SIZE 8 + +#define CYAPA_TSG_MAX_CMD_SIZE 256 + +#define GEN5_BL_CMD_VERIFY_APP_INTEGRITY 0x31 +#define GEN5_BL_CMD_GET_BL_INFO 0x38 +#define GEN5_BL_CMD_PROGRAM_VERIFY_ROW 0x39 +#define GEN5_BL_CMD_LAUNCH_APP 0x3b +#define GEN5_BL_CMD_INITIATE_BL 0x48 + +#define GEN5_HID_DESCRIPTOR_ADDR 0x0001 +#define GEN5_REPORT_DESCRIPTOR_ADDR 0x0002 +#define GEN5_INPUT_REPORT_ADDR 0x0003 +#define GEN5_OUTPUT_REPORT_ADDR 0x0004 +#define GEN5_CMD_DATA_ADDR 0x0006 + +#define GEN5_TOUCH_REPORT_HEAD_SIZE 7 +#define GEN5_TOUCH_REPORT_MAX_SIZE 127 +#define GEN5_BTN_REPORT_HEAD_SIZE 6 +#define GEN5_BTN_REPORT_MAX_SIZE 14 +#define GEN5_WAKEUP_EVENT_SIZE 4 +#define GEN5_RAW_DATA_HEAD_SIZE 24 + +#define GEN5_BL_CMD_REPORT_ID 0x40 +#define GEN5_BL_RESP_REPORT_ID 0x30 +#define GEN5_APP_CMD_REPORT_ID 0x2f +#define GEN5_APP_RESP_REPORT_ID 0x1f + +#define GEN5_APP_DEEP_SLEEP_REPORT_ID 0xf0 +#define GEN5_DEEP_SLEEP_RESP_LENGTH 5 + +#define GEN5_CMD_GET_PARAMETER 0x05 +#define GEN5_CMD_SET_PARAMETER 0x06 +#define GEN5_PARAMETER_ACT_INTERVL_ID 0x4d +#define GEN5_PARAMETER_ACT_INTERVL_SIZE 1 +#define GEN5_PARAMETER_ACT_LFT_INTERVL_ID 0x4f +#define GEN5_PARAMETER_ACT_LFT_INTERVL_SIZE 2 +#define GEN5_PARAMETER_LP_INTRVL_ID 0x4c +#define GEN5_PARAMETER_LP_INTRVL_SIZE 2 + +#define GEN5_PARAMETER_DISABLE_PIP_REPORT 0x08 + +#define GEN5_POWER_STATE_ACTIVE 0x01 +#define GEN5_POWER_STATE_LOOK_FOR_TOUCH 0x02 +#define GEN5_POWER_STATE_READY 0x03 +#define GEN5_POWER_STATE_IDLE 0x04 +#define GEN5_POWER_STATE_BTN_ONLY 0x05 +#define GEN5_POWER_STATE_OFF 0x06 + +#define GEN5_DEEP_SLEEP_STATE_MASK 0x03 +#define GEN5_DEEP_SLEEP_STATE_ON 0x00 +#define GEN5_DEEP_SLEEP_STATE_OFF 0x01 + +#define GEN5_DEEP_SLEEP_OPCODE 0x08 +#define GEN5_DEEP_SLEEP_OPCODE_MASK 0x0f + +#define GEN5_POWER_READY_MAX_INTRVL_TIME 50 /* Unit: ms */ +#define GEN5_POWER_IDLE_MAX_INTRVL_TIME 250 /* Unit: ms */ + +#define GEN5_CMD_REPORT_ID_OFFSET 4 + +#define GEN5_RESP_REPORT_ID_OFFSET 2 +#define GEN5_RESP_RSVD_OFFSET 3 +#define GEN5_RESP_RSVD_KEY 0x00 +#define GEN5_RESP_BL_SOP_OFFSET 4 +#define GEN5_SOP_KEY 0x01 /* Start of Packet */ +#define GEN5_EOP_KEY 0x17 /* End of Packet */ +#define GEN5_RESP_APP_CMD_OFFSET 4 +#define GET_GEN5_CMD_CODE(reg) ((reg) & 0x7f) + +#define VALID_CMD_RESP_HEADER(resp, cmd) \ + (((resp)[GEN5_RESP_REPORT_ID_OFFSET] == GEN5_APP_RESP_REPORT_ID) && \ + ((resp)[GEN5_RESP_RSVD_OFFSET] == GEN5_RESP_RSVD_KEY) && \ + (GET_GEN5_CMD_CODE((resp)[GEN5_RESP_APP_CMD_OFFSET]) == (cmd))) + +#define GEN5_MIN_BL_CMD_LENGTH 13 +#define GEN5_MIN_BL_RESP_LENGTH 11 +#define GEN5_MIN_APP_CMD_LENGTH 7 +#define GEN5_MIN_APP_RESP_LENGTH 5 +#define GEN5_UNSUPPORTED_CMD_RESP_LENGTH 6 + +#define GEN5_RESP_LENGTH_OFFSET 0x00 +#define GEN5_RESP_LENGTH_SIZE 2 + +#define GEN5_HID_DESCRIPTOR_SIZE 32 +#define GEN5_BL_HID_REPORT_ID 0xff +#define GEN5_APP_HID_REPORT_ID 0xf7 +#define GEN5_BL_MAX_OUTPUT_LENGTH 0x0100 +#define GEN5_APP_MAX_OUTPUT_LENGTH 0x00fe + +#define GEN5_BL_REPORT_DESCRIPTOR_SIZE 0x1d +#define GEN5_BL_REPORT_DESCRIPTOR_ID 0xfe +#define GEN5_APP_REPORT_DESCRIPTOR_SIZE 0xee +#define GEN5_APP_CONTRACT_REPORT_DESCRIPTOR_SIZE 0xfa +#define GEN5_APP_REPORT_DESCRIPTOR_ID 0xf6 + +#define GEN5_TOUCH_REPORT_ID 0x01 +#define GEN5_BTN_REPORT_ID 0x03 +#define GEN5_WAKEUP_EVENT_REPORT_ID 0x04 +#define GEN5_OLD_PUSH_BTN_REPORT_ID 0x05 +#define GEN5_PUSH_BTN_REPORT_ID 0x06 + +#define GEN5_CMD_COMPLETE_SUCCESS(status) ((status) == 0x00) + +#define GEN5_BL_INITIATE_RESP_LEN 11 +#define GEN5_BL_FAIL_EXIT_RESP_LEN 11 +#define GEN5_BL_FAIL_EXIT_STATUS_CODE 0x0c +#define GEN5_BL_VERIFY_INTEGRITY_RESP_LEN 12 +#define GEN5_BL_INTEGRITY_CHEKC_PASS 0x00 +#define GEN5_BL_BLOCK_WRITE_RESP_LEN 11 +#define GEN5_BL_READ_APP_INFO_RESP_LEN 31 +#define GEN5_CMD_CALIBRATE 0x28 +#define CYAPA_SENSING_MODE_MUTUAL_CAP_FINE 0x00 +#define CYAPA_SENSING_MODE_SELF_CAP 0x02 + +#define GEN5_CMD_RETRIEVE_DATA_STRUCTURE 0x24 +#define GEN5_RETRIEVE_MUTUAL_PWC_DATA 0x00 +#define GEN5_RETRIEVE_SELF_CAP_PWC_DATA 0x01 + +#define GEN5_RETRIEVE_DATA_ELEMENT_SIZE_MASK 0x07 + +#define GEN5_CMD_EXECUTE_PANEL_SCAN 0x2a +#define GEN5_CMD_RETRIEVE_PANEL_SCAN 0x2b +#define GEN5_PANEL_SCAN_MUTUAL_RAW_DATA 0x00 +#define GEN5_PANEL_SCAN_MUTUAL_BASELINE 0x01 +#define GEN5_PANEL_SCAN_MUTUAL_DIFFCOUNT 0x02 +#define GEN5_PANEL_SCAN_SELF_RAW_DATA 0x03 +#define GEN5_PANEL_SCAN_SELF_BASELINE 0x04 +#define GEN5_PANEL_SCAN_SELF_DIFFCOUNT 0x05 + +/* The offset only valid for reterive PWC and panel scan commands */ +#define GEN5_RESP_DATA_STRUCTURE_OFFSET 10 +#define GEN5_PWC_DATA_ELEMENT_SIZE_MASK 0x07 + +#define GEN5_NUMBER_OF_TOUCH_OFFSET 5 +#define GEN5_NUMBER_OF_TOUCH_MASK 0x1f +#define GEN5_BUTTONS_OFFSET 5 +#define GEN5_BUTTONS_MASK 0x0f +#define GEN5_GET_EVENT_ID(reg) (((reg) >> 5) & 0x03) +#define GEN5_GET_TOUCH_ID(reg) ((reg) & 0x1f) + +#define GEN5_PRODUCT_FAMILY_MASK 0xf000 +#define GEN5_PRODUCT_FAMILY_TRACKPAD 0x1000 + +#define TSG_INVALID_CMD 0xff + +struct cyapa_gen5_touch_record { + /* + * Bit 7 - 3: reserved + * Bit 2 - 0: touch type; + * 0 : standard finger; + * 1 - 15 : reserved. + */ + u8 touch_type; + + /* + * Bit 7: indicates touch liftoff status. + * 0 : touch is currently on the panel. + * 1 : touch record indicates a liftoff. + * Bit 6 - 5: indicates an event associated with this touch instance + * 0 : no event + * 1 : touchdown + * 2 : significant displacement (> active distance) + * 3 : liftoff (record reports last known coordinates) + * Bit 4 - 0: An arbitrary ID tag associated with a finger + * to allow tracking a touch as it moves around the panel. + */ + u8 touch_tip_event_id; + + /* Bit 7 - 0 of X-axis coordinate of the touch in pixel. */ + u8 x_lo; + + /* Bit 15 - 8 of X-axis coordinate of the touch in pixel. */ + u8 x_hi; + + /* Bit 7 - 0 of Y-axis coordinate of the touch in pixel. */ + u8 y_lo; + + /* Bit 15 - 8 of Y-axis coordinate of the touch in pixel. */ + u8 y_hi; + + /* Touch intensity in counts, pressure value. */ + u8 z; + + /* + * The length of the major axis of the ellipse of contact between + * the finger and the panel (ABS_MT_TOUCH_MAJOR). + */ + u8 major_axis_len; + + /* + * The length of the minor axis of the ellipse of contact between + * the finger and the panel (ABS_MT_TOUCH_MINOR). + */ + u8 minor_axis_len; + + /* + * The length of the major axis of the approaching tool. + * (ABS_MT_WIDTH_MAJOR) + */ + u8 major_tool_len; + + /* + * The length of the minor axis of the approaching tool. + * (ABS_MT_WIDTH_MINOR) + */ + u8 minor_tool_len; + + /* + * The angle between the panel vertical axis and + * the major axis of the contact ellipse. This value is an 8-bit + * signed integer. The range is -127 to +127 (corresponding to + * -90 degree and +90 degree respectively). + * The positive direction is clockwise from the vertical axis. + * If the ellipse of contact degenerates into a circle, + * orientation is reported as 0. + */ + u8 orientation; +} __packed; + +struct cyapa_gen5_report_data { + u8 report_head[GEN5_TOUCH_REPORT_HEAD_SIZE]; + struct cyapa_gen5_touch_record touch_records[10]; +} __packed; + +struct gen5_app_cmd_head { + __le16 addr; /* Output report register address, must be 0004h */ + /* Size of packet not including output report register address */ + __le16 length; + u8 report_id; /* Application output report id, must be 2Fh */ + u8 rsvd; /* Reserved, must be 0 */ + /* + * Bit 7: reserved, must be 0. + * Bit 6-0: command code. + */ + u8 cmd_code; + u8 parameter_data[0]; /* Parameter data variable based on cmd_code */ +} __packed; + +/* Applicaton get/set parameter command data structure */ +struct gen5_app_set_parameter_data { + u8 parameter_id; + u8 parameter_size; + __le32 value; +} __packed; + +struct gen5_app_get_parameter_data { + u8 parameter_id; +} __packed; + +/* Variables to record latest gen5 trackpad power states. */ +#define GEN5_DEV_SET_PWR_STATE(cyapa, s) ((cyapa)->dev_pwr_mode = (s)) +#define GEN5_DEV_GET_PWR_STATE(cyapa) ((cyapa)->dev_pwr_mode) +#define GEN5_DEV_SET_SLEEP_TIME(cyapa, t) ((cyapa)->dev_sleep_time = (t)) +#define GEN5_DEV_GET_SLEEP_TIME(cyapa) ((cyapa)->dev_sleep_time) +#define GEN5_DEV_UNINIT_SLEEP_TIME(cyapa) \ + (((cyapa)->dev_sleep_time) == UNINIT_SLEEP_TIME) + +static int cyapa_gen5_initialize(struct cyapa *cyapa) +{ + struct cyapa_gen5_cmd_states *gen5_pip = &cyapa->cmd_states.gen5; + + init_completion(&gen5_pip->cmd_ready); + atomic_set(&gen5_pip->cmd_issued, 0); + mutex_init(&gen5_pip->cmd_lock); + + gen5_pip->resp_sort_func = NULL; + gen5_pip->in_progress_cmd = TSG_INVALID_CMD; + gen5_pip->resp_data = NULL; + gen5_pip->resp_len = NULL; + + cyapa->dev_pwr_mode = UNINIT_PWR_MODE; + cyapa->dev_sleep_time = UNINIT_SLEEP_TIME; + + return 0; +} + +/* Return negative errno, or else the number of bytes read. */ +static ssize_t cyapa_i2c_pip_read(struct cyapa *cyapa, u8 *buf, size_t size) +{ + int ret; + + if (size == 0) + return 0; + + if (!buf || size > CYAPA_REG_MAP_SIZE) + return -EINVAL; + + ret = i2c_master_recv(cyapa->client, buf, size); + + if (ret != size) + return (ret < 0) ? ret : -EIO; + + return size; +} + +/** + * Return a negative errno code else zero on success. + */ +static ssize_t cyapa_i2c_pip_write(struct cyapa *cyapa, u8 *buf, size_t size) +{ + int ret; + + if (!buf || !size) + return -EINVAL; + + ret = i2c_master_send(cyapa->client, buf, size); + + if (ret != size) + return (ret < 0) ? ret : -EIO; + + return 0; +} + +/** + * This function is aimed to dump all not read data in Gen5 trackpad + * before send any command, otherwise, the interrupt line will be blocked. + */ +static int cyapa_empty_pip_output_data(struct cyapa *cyapa, + u8 *buf, int *len, cb_sort func) +{ + struct cyapa_gen5_cmd_states *gen5_pip = &cyapa->cmd_states.gen5; + int length; + int report_count; + int empty_count; + int buf_len; + int error; + + buf_len = 0; + if (len) { + buf_len = (*len < CYAPA_REG_MAP_SIZE) ? + *len : CYAPA_REG_MAP_SIZE; + *len = 0; + } + + report_count = 8; /* max 7 pending data before command response data */ + empty_count = 0; + do { + /* + * Depending on testing in cyapa driver, there are max 5 "02 00" + * packets between two valid buffered data report in firmware. + * So in order to dump all buffered data out and + * make interrupt line release for reassert again, + * we must set the empty_count check value bigger than 5 to + * make it work. Otherwise, in some situation, + * the interrupt line may unable to reactive again, + * which will cause trackpad device unable to + * report data any more. + * for example, it may happen in EFT and ESD testing. + */ + if (empty_count > 5) + return 0; + + error = cyapa_i2c_pip_read(cyapa, gen5_pip->empty_buf, + GEN5_RESP_LENGTH_SIZE); + if (error < 0) + return error; + + length = get_unaligned_le16(gen5_pip->empty_buf); + if (length == GEN5_RESP_LENGTH_SIZE) { + empty_count++; + continue; + } else if (length > CYAPA_REG_MAP_SIZE) { + /* Should not happen */ + return -EINVAL; + } else if (length == 0) { + /* Application or bootloader launch data polled out. */ + length = GEN5_RESP_LENGTH_SIZE; + if (buf && buf_len && func && + func(cyapa, gen5_pip->empty_buf, length)) { + length = min(buf_len, length); + memcpy(buf, gen5_pip->empty_buf, length); + *len = length; + /* Response found, success. */ + return 0; + } + continue; + } + + error = cyapa_i2c_pip_read(cyapa, gen5_pip->empty_buf, length); + if (error < 0) + return error; + + report_count--; + empty_count = 0; + length = get_unaligned_le16(gen5_pip->empty_buf); + if (length <= GEN5_RESP_LENGTH_SIZE) { + empty_count++; + } else if (buf && buf_len && func && + func(cyapa, gen5_pip->empty_buf, length)) { + length = min(buf_len, length); + memcpy(buf, gen5_pip->empty_buf, length); + *len = length; + /* Response found, success. */ + return 0; + } + + error = -EINVAL; + } while (report_count); + + return error; +} + +static int cyapa_do_i2c_pip_cmd_irq_sync( + struct cyapa *cyapa, + u8 *cmd, size_t cmd_len, + unsigned long timeout) +{ + struct cyapa_gen5_cmd_states *gen5_pip = &cyapa->cmd_states.gen5; + int error; + + /* Wait for interrupt to set ready completion */ + init_completion(&gen5_pip->cmd_ready); + + atomic_inc(&gen5_pip->cmd_issued); + error = cyapa_i2c_pip_write(cyapa, cmd, cmd_len); + if (error) { + atomic_dec(&gen5_pip->cmd_issued); + return (error < 0) ? error : -EIO; + } + + /* Wait for interrupt to indicate command is completed. */ + timeout = wait_for_completion_timeout(&gen5_pip->cmd_ready, + msecs_to_jiffies(timeout)); + if (timeout == 0) { + atomic_dec(&gen5_pip->cmd_issued); + return -ETIMEDOUT; + } + + return 0; +} + +static int cyapa_do_i2c_pip_cmd_polling( + struct cyapa *cyapa, + u8 *cmd, size_t cmd_len, + u8 *resp_data, int *resp_len, + unsigned long timeout, + cb_sort func) +{ + struct cyapa_gen5_cmd_states *gen5_pip = &cyapa->cmd_states.gen5; + int tries; + int length; + int error; + + atomic_inc(&gen5_pip->cmd_issued); + error = cyapa_i2c_pip_write(cyapa, cmd, cmd_len); + if (error) { + atomic_dec(&gen5_pip->cmd_issued); + return error < 0 ? error : -EIO; + } + + length = resp_len ? *resp_len : 0; + if (resp_data && resp_len && length != 0 && func) { + tries = timeout / 5; + do { + usleep_range(3000, 5000); + *resp_len = length; + error = cyapa_empty_pip_output_data(cyapa, + resp_data, resp_len, func); + if (error || *resp_len == 0) + continue; + else + break; + } while (--tries > 0); + if ((error || *resp_len == 0) || tries <= 0) + error = error ? error : -ETIMEDOUT; + } + + atomic_dec(&gen5_pip->cmd_issued); + return error; +} + +static int cyapa_i2c_pip_cmd_irq_sync( + struct cyapa *cyapa, + u8 *cmd, int cmd_len, + u8 *resp_data, int *resp_len, + unsigned long timeout, + cb_sort func, + bool irq_mode) +{ + struct cyapa_gen5_cmd_states *gen5_pip = &cyapa->cmd_states.gen5; + int error; + + if (!cmd || !cmd_len) + return -EINVAL; + + /* Commands must be serialized. */ + error = mutex_lock_interruptible(&gen5_pip->cmd_lock); + if (error) + return error; + + gen5_pip->resp_sort_func = func; + gen5_pip->resp_data = resp_data; + gen5_pip->resp_len = resp_len; + + if (cmd_len >= GEN5_MIN_APP_CMD_LENGTH && + cmd[4] == GEN5_APP_CMD_REPORT_ID) { + /* Application command */ + gen5_pip->in_progress_cmd = cmd[6] & 0x7f; + } else if (cmd_len >= GEN5_MIN_BL_CMD_LENGTH && + cmd[4] == GEN5_BL_CMD_REPORT_ID) { + /* Bootloader command */ + gen5_pip->in_progress_cmd = cmd[7]; + } + + /* Send command data, wait and read output response data's length. */ + if (irq_mode) { + gen5_pip->is_irq_mode = true; + error = cyapa_do_i2c_pip_cmd_irq_sync(cyapa, cmd, cmd_len, + timeout); + if (error == -ETIMEDOUT && resp_data && + resp_len && *resp_len != 0 && func) { + /* + * For some old version, there was no interrupt for + * the command response data, so need to poll here + * to try to get the response data. + */ + error = cyapa_empty_pip_output_data(cyapa, + resp_data, resp_len, func); + if (error || *resp_len == 0) + error = error ? error : -ETIMEDOUT; + } + } else { + gen5_pip->is_irq_mode = false; + error = cyapa_do_i2c_pip_cmd_polling(cyapa, cmd, cmd_len, + resp_data, resp_len, timeout, func); + } + + gen5_pip->resp_sort_func = NULL; + gen5_pip->resp_data = NULL; + gen5_pip->resp_len = NULL; + gen5_pip->in_progress_cmd = TSG_INVALID_CMD; + + mutex_unlock(&gen5_pip->cmd_lock); + return error; +} + +static bool cyapa_gen5_sort_tsg_pip_bl_resp_data(struct cyapa *cyapa, + u8 *data, int len) +{ + if (!data || len < GEN5_MIN_BL_RESP_LENGTH) + return false; + + /* Bootloader input report id 30h */ + if (data[GEN5_RESP_REPORT_ID_OFFSET] == GEN5_BL_RESP_REPORT_ID && + data[GEN5_RESP_RSVD_OFFSET] == GEN5_RESP_RSVD_KEY && + data[GEN5_RESP_BL_SOP_OFFSET] == GEN5_SOP_KEY) + return true; + + return false; +} + +static bool cyapa_gen5_sort_tsg_pip_app_resp_data(struct cyapa *cyapa, + u8 *data, int len) +{ + struct cyapa_gen5_cmd_states *gen5_pip = &cyapa->cmd_states.gen5; + int resp_len; + + if (!data || len < GEN5_MIN_APP_RESP_LENGTH) + return false; + + if (data[GEN5_RESP_REPORT_ID_OFFSET] == GEN5_APP_RESP_REPORT_ID && + data[GEN5_RESP_RSVD_OFFSET] == GEN5_RESP_RSVD_KEY) { + resp_len = get_unaligned_le16(&data[GEN5_RESP_LENGTH_OFFSET]); + if (GET_GEN5_CMD_CODE(data[GEN5_RESP_APP_CMD_OFFSET]) == 0x00 && + resp_len == GEN5_UNSUPPORTED_CMD_RESP_LENGTH && + data[5] == gen5_pip->in_progress_cmd) { + /* Unsupported command code */ + return false; + } else if (GET_GEN5_CMD_CODE(data[GEN5_RESP_APP_CMD_OFFSET]) == + gen5_pip->in_progress_cmd) { + /* Correct command response received */ + return true; + } + } + + return false; +} + +static bool cyapa_gen5_sort_hid_descriptor_data(struct cyapa *cyapa, + u8 *buf, int len) +{ + int resp_len; + int max_output_len; + + /* Check hid descriptor. */ + if (len != GEN5_HID_DESCRIPTOR_SIZE) + return false; + + resp_len = get_unaligned_le16(&buf[GEN5_RESP_LENGTH_OFFSET]); + max_output_len = get_unaligned_le16(&buf[16]); + if (resp_len == GEN5_HID_DESCRIPTOR_SIZE) { + if (buf[GEN5_RESP_REPORT_ID_OFFSET] == GEN5_BL_HID_REPORT_ID && + max_output_len == GEN5_BL_MAX_OUTPUT_LENGTH) { + /* BL mode HID Descriptor */ + return true; + } else if ((buf[GEN5_RESP_REPORT_ID_OFFSET] == + GEN5_APP_HID_REPORT_ID) && + max_output_len == GEN5_APP_MAX_OUTPUT_LENGTH) { + /* APP mode HID Descriptor */ + return true; + } + } + + return false; +} + +static bool cyapa_gen5_sort_deep_sleep_data(struct cyapa *cyapa, + u8 *buf, int len) +{ + if (len == GEN5_DEEP_SLEEP_RESP_LENGTH && + buf[GEN5_RESP_REPORT_ID_OFFSET] == + GEN5_APP_DEEP_SLEEP_REPORT_ID && + (buf[4] & GEN5_DEEP_SLEEP_OPCODE_MASK) == + GEN5_DEEP_SLEEP_OPCODE) + return true; + return false; +} + +static int gen5_idle_state_parse(struct cyapa *cyapa) +{ + u8 resp_data[GEN5_HID_DESCRIPTOR_SIZE]; + int max_output_len; + int length; + u8 cmd[2]; + int ret; + int error; + + /* + * Dump all buffered data firstly for the situation + * when the trackpad is just power on the cyapa go here. + */ + cyapa_empty_pip_output_data(cyapa, NULL, NULL, NULL); + + memset(resp_data, 0, sizeof(resp_data)); + ret = cyapa_i2c_pip_read(cyapa, resp_data, 3); + if (ret != 3) + return ret < 0 ? ret : -EIO; + + length = get_unaligned_le16(&resp_data[GEN5_RESP_LENGTH_OFFSET]); + if (length == GEN5_RESP_LENGTH_SIZE) { + /* Normal state of Gen5 with no data to respose */ + cyapa->gen = CYAPA_GEN5; + + cyapa_empty_pip_output_data(cyapa, NULL, NULL, NULL); + + /* Read description from trackpad device */ + cmd[0] = 0x01; + cmd[1] = 0x00; + length = GEN5_HID_DESCRIPTOR_SIZE; + error = cyapa_i2c_pip_cmd_irq_sync(cyapa, + cmd, GEN5_RESP_LENGTH_SIZE, + resp_data, &length, + 300, + cyapa_gen5_sort_hid_descriptor_data, + false); + if (error) + return error; + + length = get_unaligned_le16( + &resp_data[GEN5_RESP_LENGTH_OFFSET]); + max_output_len = get_unaligned_le16(&resp_data[16]); + if ((length == GEN5_HID_DESCRIPTOR_SIZE || + length == GEN5_RESP_LENGTH_SIZE) && + (resp_data[GEN5_RESP_REPORT_ID_OFFSET] == + GEN5_BL_HID_REPORT_ID) && + max_output_len == GEN5_BL_MAX_OUTPUT_LENGTH) { + /* BL mode HID Description read */ + cyapa->state = CYAPA_STATE_GEN5_BL; + } else if ((length == GEN5_HID_DESCRIPTOR_SIZE || + length == GEN5_RESP_LENGTH_SIZE) && + (resp_data[GEN5_RESP_REPORT_ID_OFFSET] == + GEN5_APP_HID_REPORT_ID) && + max_output_len == GEN5_APP_MAX_OUTPUT_LENGTH) { + /* APP mode HID Description read */ + cyapa->state = CYAPA_STATE_GEN5_APP; + } else { + /* Should not happen!!! */ + cyapa->state = CYAPA_STATE_NO_DEVICE; + } + } + + return 0; +} + +static int gen5_hid_description_header_parse(struct cyapa *cyapa, u8 *reg_data) +{ + int length; + u8 resp_data[32]; + int max_output_len; + int ret; + + /* 0x20 0x00 0xF7 is Gen5 Application HID Description Header; + * 0x20 0x00 0xFF is Gen5 Booloader HID Description Header. + * + * Must read HID Description content through out, + * otherwise Gen5 trackpad cannot response next command + * or report any touch or button data. + */ + ret = cyapa_i2c_pip_read(cyapa, resp_data, + GEN5_HID_DESCRIPTOR_SIZE); + if (ret != GEN5_HID_DESCRIPTOR_SIZE) + return ret < 0 ? ret : -EIO; + length = get_unaligned_le16(&resp_data[GEN5_RESP_LENGTH_OFFSET]); + max_output_len = get_unaligned_le16(&resp_data[16]); + if (length == GEN5_RESP_LENGTH_SIZE) { + if (reg_data[GEN5_RESP_REPORT_ID_OFFSET] == + GEN5_BL_HID_REPORT_ID) { + /* + * BL mode HID Description has been previously + * read out. + */ + cyapa->gen = CYAPA_GEN5; + cyapa->state = CYAPA_STATE_GEN5_BL; + } else { + /* + * APP mode HID Description has been previously + * read out. + */ + cyapa->gen = CYAPA_GEN5; + cyapa->state = CYAPA_STATE_GEN5_APP; + } + } else if (length == GEN5_HID_DESCRIPTOR_SIZE && + resp_data[2] == GEN5_BL_HID_REPORT_ID && + max_output_len == GEN5_BL_MAX_OUTPUT_LENGTH) { + /* BL mode HID Description read. */ + cyapa->gen = CYAPA_GEN5; + cyapa->state = CYAPA_STATE_GEN5_BL; + } else if (length == GEN5_HID_DESCRIPTOR_SIZE && + (resp_data[GEN5_RESP_REPORT_ID_OFFSET] == + GEN5_APP_HID_REPORT_ID) && + max_output_len == GEN5_APP_MAX_OUTPUT_LENGTH) { + /* APP mode HID Description read. */ + cyapa->gen = CYAPA_GEN5; + cyapa->state = CYAPA_STATE_GEN5_APP; + } else { + /* Should not happen!!! */ + cyapa->state = CYAPA_STATE_NO_DEVICE; + } + + return 0; +} + +static int gen5_report_data_header_parse(struct cyapa *cyapa, u8 *reg_data) +{ + int length; + + length = get_unaligned_le16(®_data[GEN5_RESP_LENGTH_OFFSET]); + switch (reg_data[GEN5_RESP_REPORT_ID_OFFSET]) { + case GEN5_TOUCH_REPORT_ID: + if (length < GEN5_TOUCH_REPORT_HEAD_SIZE || + length > GEN5_TOUCH_REPORT_MAX_SIZE) + return -EINVAL; + break; + case GEN5_BTN_REPORT_ID: + case GEN5_OLD_PUSH_BTN_REPORT_ID: + case GEN5_PUSH_BTN_REPORT_ID: + if (length < GEN5_BTN_REPORT_HEAD_SIZE || + length > GEN5_BTN_REPORT_MAX_SIZE) + return -EINVAL; + break; + case GEN5_WAKEUP_EVENT_REPORT_ID: + if (length != GEN5_WAKEUP_EVENT_SIZE) + return -EINVAL; + break; + default: + return -EINVAL; + } + + cyapa->gen = CYAPA_GEN5; + cyapa->state = CYAPA_STATE_GEN5_APP; + return 0; +} + +static int gen5_cmd_resp_header_parse(struct cyapa *cyapa, u8 *reg_data) +{ + struct cyapa_gen5_cmd_states *gen5_pip = &cyapa->cmd_states.gen5; + int length; + int ret; + + /* + * Must read report data through out, + * otherwise Gen5 trackpad cannot response next command + * or report any touch or button data. + */ + length = get_unaligned_le16(®_data[GEN5_RESP_LENGTH_OFFSET]); + ret = cyapa_i2c_pip_read(cyapa, gen5_pip->empty_buf, length); + if (ret != length) + return ret < 0 ? ret : -EIO; + + if (length == GEN5_RESP_LENGTH_SIZE) { + /* Previous command has read the data through out. */ + if (reg_data[GEN5_RESP_REPORT_ID_OFFSET] == + GEN5_BL_RESP_REPORT_ID) { + /* Gen5 BL command response data detected */ + cyapa->gen = CYAPA_GEN5; + cyapa->state = CYAPA_STATE_GEN5_BL; + } else { + /* Gen5 APP command response data detected */ + cyapa->gen = CYAPA_GEN5; + cyapa->state = CYAPA_STATE_GEN5_APP; + } + } else if ((gen5_pip->empty_buf[GEN5_RESP_REPORT_ID_OFFSET] == + GEN5_BL_RESP_REPORT_ID) && + (gen5_pip->empty_buf[GEN5_RESP_RSVD_OFFSET] == + GEN5_RESP_RSVD_KEY) && + (gen5_pip->empty_buf[GEN5_RESP_BL_SOP_OFFSET] == + GEN5_SOP_KEY) && + (gen5_pip->empty_buf[length - 1] == + GEN5_EOP_KEY)) { + /* Gen5 BL command response data detected */ + cyapa->gen = CYAPA_GEN5; + cyapa->state = CYAPA_STATE_GEN5_BL; + } else if (gen5_pip->empty_buf[GEN5_RESP_REPORT_ID_OFFSET] == + GEN5_APP_RESP_REPORT_ID && + gen5_pip->empty_buf[GEN5_RESP_RSVD_OFFSET] == + GEN5_RESP_RSVD_KEY) { + /* Gen5 APP command response data detected */ + cyapa->gen = CYAPA_GEN5; + cyapa->state = CYAPA_STATE_GEN5_APP; + } else { + /* Should not happen!!! */ + cyapa->state = CYAPA_STATE_NO_DEVICE; + } + + return 0; +} + +static int cyapa_gen5_state_parse(struct cyapa *cyapa, u8 *reg_data, int len) +{ + int length; + + if (!reg_data || len < 3) + return -EINVAL; + + cyapa->state = CYAPA_STATE_NO_DEVICE; + + /* Parse based on Gen5 characteristic registers and bits */ + length = get_unaligned_le16(®_data[GEN5_RESP_LENGTH_OFFSET]); + if (length == 0 || length == GEN5_RESP_LENGTH_SIZE) { + gen5_idle_state_parse(cyapa); + } else if (length == GEN5_HID_DESCRIPTOR_SIZE && + (reg_data[2] == GEN5_BL_HID_REPORT_ID || + reg_data[2] == GEN5_APP_HID_REPORT_ID)) { + gen5_hid_description_header_parse(cyapa, reg_data); + } else if ((length == GEN5_APP_REPORT_DESCRIPTOR_SIZE || + length == GEN5_APP_CONTRACT_REPORT_DESCRIPTOR_SIZE) && + reg_data[2] == GEN5_APP_REPORT_DESCRIPTOR_ID) { + /* 0xEE 0x00 0xF6 is Gen5 APP report description header. */ + cyapa->gen = CYAPA_GEN5; + cyapa->state = CYAPA_STATE_GEN5_APP; + } else if (length == GEN5_BL_REPORT_DESCRIPTOR_SIZE && + reg_data[2] == GEN5_BL_REPORT_DESCRIPTOR_ID) { + /* 0x1D 0x00 0xFE is Gen5 BL report descriptior header. */ + cyapa->gen = CYAPA_GEN5; + cyapa->state = CYAPA_STATE_GEN5_BL; + } else if (reg_data[2] == GEN5_TOUCH_REPORT_ID || + reg_data[2] == GEN5_BTN_REPORT_ID || + reg_data[2] == GEN5_OLD_PUSH_BTN_REPORT_ID || + reg_data[2] == GEN5_PUSH_BTN_REPORT_ID || + reg_data[2] == GEN5_WAKEUP_EVENT_REPORT_ID) { + gen5_report_data_header_parse(cyapa, reg_data); + } else if (reg_data[2] == GEN5_BL_RESP_REPORT_ID || + reg_data[2] == GEN5_APP_RESP_REPORT_ID) { + gen5_cmd_resp_header_parse(cyapa, reg_data); + } + + if (cyapa->gen == CYAPA_GEN5) { + /* + * Must read the content (e.g.: report description and so on) + * from trackpad device throughout. Otherwise, + * Gen5 trackpad cannot response to next command or + * report any touch or button data later. + */ + cyapa_empty_pip_output_data(cyapa, NULL, NULL, NULL); + + if (cyapa->state == CYAPA_STATE_GEN5_APP || + cyapa->state == CYAPA_STATE_GEN5_BL) + return 0; + } + + return -EAGAIN; +} + +static bool cyapa_gen5_sort_bl_exit_data(struct cyapa *cyapa, u8 *buf, int len) +{ + if (buf == NULL || len < GEN5_RESP_LENGTH_SIZE) + return false; + + if (buf[0] == 0 && buf[1] == 0) + return true; + + /* Exit bootloader failed for some reason. */ + if (len == GEN5_BL_FAIL_EXIT_RESP_LEN && + buf[GEN5_RESP_REPORT_ID_OFFSET] == + GEN5_BL_RESP_REPORT_ID && + buf[GEN5_RESP_RSVD_OFFSET] == GEN5_RESP_RSVD_KEY && + buf[GEN5_RESP_BL_SOP_OFFSET] == GEN5_SOP_KEY && + buf[10] == GEN5_EOP_KEY) + return true; + + return false; +} + +static int cyapa_gen5_bl_exit(struct cyapa *cyapa) +{ + + u8 bl_gen5_bl_exit[] = { 0x04, 0x00, + 0x0B, 0x00, 0x40, 0x00, 0x01, 0x3b, 0x00, 0x00, + 0x20, 0xc7, 0x17 + }; + u8 resp_data[11]; + int resp_len; + int error; + + resp_len = sizeof(resp_data); + error = cyapa_i2c_pip_cmd_irq_sync(cyapa, + bl_gen5_bl_exit, sizeof(bl_gen5_bl_exit), + resp_data, &resp_len, + 5000, cyapa_gen5_sort_bl_exit_data, false); + if (error) + return error; + + if (resp_len == GEN5_BL_FAIL_EXIT_RESP_LEN || + resp_data[GEN5_RESP_REPORT_ID_OFFSET] == + GEN5_BL_RESP_REPORT_ID) + return -EAGAIN; + + if (resp_data[0] == 0x00 && resp_data[1] == 0x00) + return 0; + + return -ENODEV; +} + +static int cyapa_gen5_change_power_state(struct cyapa *cyapa, u8 power_state) +{ + u8 cmd[8] = { 0x04, 0x00, 0x06, 0x00, 0x2f, 0x00, 0x08, 0x01 }; + u8 resp_data[6]; + int resp_len; + int error; + + cmd[7] = power_state; + resp_len = sizeof(resp_data); + error = cyapa_i2c_pip_cmd_irq_sync(cyapa, cmd, sizeof(cmd), + resp_data, &resp_len, + 500, cyapa_gen5_sort_tsg_pip_app_resp_data, false); + if (error || !VALID_CMD_RESP_HEADER(resp_data, 0x08) || + !GEN5_CMD_COMPLETE_SUCCESS(resp_data[5])) + return error < 0 ? error : -EINVAL; + + return 0; +} + +static int cyapa_gen5_set_interval_time(struct cyapa *cyapa, + u8 parameter_id, u16 interval_time) +{ + struct gen5_app_cmd_head *app_cmd_head; + struct gen5_app_set_parameter_data *parameter_data; + u8 cmd[CYAPA_TSG_MAX_CMD_SIZE]; + int cmd_len; + u8 resp_data[7]; + int resp_len; + u8 parameter_size; + int error; + + memset(cmd, 0, CYAPA_TSG_MAX_CMD_SIZE); + app_cmd_head = (struct gen5_app_cmd_head *)cmd; + parameter_data = (struct gen5_app_set_parameter_data *) + app_cmd_head->parameter_data; + cmd_len = sizeof(struct gen5_app_cmd_head) + + sizeof(struct gen5_app_set_parameter_data); + + switch (parameter_id) { + case GEN5_PARAMETER_ACT_INTERVL_ID: + parameter_size = GEN5_PARAMETER_ACT_INTERVL_SIZE; + break; + case GEN5_PARAMETER_ACT_LFT_INTERVL_ID: + parameter_size = GEN5_PARAMETER_ACT_LFT_INTERVL_SIZE; + break; + case GEN5_PARAMETER_LP_INTRVL_ID: + parameter_size = GEN5_PARAMETER_LP_INTRVL_SIZE; + break; + default: + return -EINVAL; + } + + put_unaligned_le16(GEN5_OUTPUT_REPORT_ADDR, &app_cmd_head->addr); + /* + * Don't include unused parameter value bytes and + * 2 bytes register address. + */ + put_unaligned_le16(cmd_len - (4 - parameter_size) - 2, + &app_cmd_head->length); + app_cmd_head->report_id = GEN5_APP_CMD_REPORT_ID; + app_cmd_head->cmd_code = GEN5_CMD_SET_PARAMETER; + parameter_data->parameter_id = parameter_id; + parameter_data->parameter_size = parameter_size; + put_unaligned_le32((u32)interval_time, ¶meter_data->value); + resp_len = sizeof(resp_data); + error = cyapa_i2c_pip_cmd_irq_sync(cyapa, cmd, cmd_len, + resp_data, &resp_len, + 500, cyapa_gen5_sort_tsg_pip_app_resp_data, false); + if (error || resp_data[5] != parameter_id || + resp_data[6] != parameter_size || + !VALID_CMD_RESP_HEADER(resp_data, GEN5_CMD_SET_PARAMETER)) + return error < 0 ? error : -EINVAL; + + return 0; +} + +static int cyapa_gen5_get_interval_time(struct cyapa *cyapa, + u8 parameter_id, u16 *interval_time) +{ + struct gen5_app_cmd_head *app_cmd_head; + struct gen5_app_get_parameter_data *parameter_data; + u8 cmd[CYAPA_TSG_MAX_CMD_SIZE]; + int cmd_len; + u8 resp_data[11]; + int resp_len; + u8 parameter_size; + u16 mask, i; + int error; + + memset(cmd, 0, CYAPA_TSG_MAX_CMD_SIZE); + app_cmd_head = (struct gen5_app_cmd_head *)cmd; + parameter_data = (struct gen5_app_get_parameter_data *) + app_cmd_head->parameter_data; + cmd_len = sizeof(struct gen5_app_cmd_head) + + sizeof(struct gen5_app_get_parameter_data); + + *interval_time = 0; + switch (parameter_id) { + case GEN5_PARAMETER_ACT_INTERVL_ID: + parameter_size = GEN5_PARAMETER_ACT_INTERVL_SIZE; + break; + case GEN5_PARAMETER_ACT_LFT_INTERVL_ID: + parameter_size = GEN5_PARAMETER_ACT_LFT_INTERVL_SIZE; + break; + case GEN5_PARAMETER_LP_INTRVL_ID: + parameter_size = GEN5_PARAMETER_LP_INTRVL_SIZE; + break; + default: + return -EINVAL; + } + + put_unaligned_le16(GEN5_HID_DESCRIPTOR_ADDR, &app_cmd_head->addr); + /* Don't include 2 bytes register address */ + put_unaligned_le16(cmd_len - 2, &app_cmd_head->length); + app_cmd_head->report_id = GEN5_APP_CMD_REPORT_ID; + app_cmd_head->cmd_code = GEN5_CMD_GET_PARAMETER; + parameter_data->parameter_id = parameter_id; + + resp_len = sizeof(resp_data); + error = cyapa_i2c_pip_cmd_irq_sync(cyapa, cmd, cmd_len, + resp_data, &resp_len, + 500, cyapa_gen5_sort_tsg_pip_app_resp_data, false); + if (error || resp_data[5] != parameter_id || resp_data[6] == 0 || + !VALID_CMD_RESP_HEADER(resp_data, GEN5_CMD_GET_PARAMETER)) + return error < 0 ? error : -EINVAL; + + mask = 0; + for (i = 0; i < parameter_size; i++) + mask |= (0xff << (i * 8)); + *interval_time = get_unaligned_le16(&resp_data[7]) & mask; + + return 0; +} + +static int cyapa_gen5_disable_pip_report(struct cyapa *cyapa) +{ + struct gen5_app_cmd_head *app_cmd_head; + u8 cmd[10]; + u8 resp_data[7]; + int resp_len; + int error; + + memset(cmd, 0, sizeof(cmd)); + app_cmd_head = (struct gen5_app_cmd_head *)cmd; + + put_unaligned_le16(GEN5_HID_DESCRIPTOR_ADDR, &app_cmd_head->addr); + put_unaligned_le16(sizeof(cmd) - 2, &app_cmd_head->length); + app_cmd_head->report_id = GEN5_APP_CMD_REPORT_ID; + app_cmd_head->cmd_code = GEN5_CMD_SET_PARAMETER; + app_cmd_head->parameter_data[0] = GEN5_PARAMETER_DISABLE_PIP_REPORT; + app_cmd_head->parameter_data[1] = 0x01; + app_cmd_head->parameter_data[2] = 0x01; + resp_len = sizeof(resp_data); + error = cyapa_i2c_pip_cmd_irq_sync(cyapa, cmd, sizeof(cmd), + resp_data, &resp_len, + 500, cyapa_gen5_sort_tsg_pip_app_resp_data, false); + if (error || resp_data[5] != GEN5_PARAMETER_DISABLE_PIP_REPORT || + !VALID_CMD_RESP_HEADER(resp_data, GEN5_CMD_SET_PARAMETER) || + resp_data[6] != 0x01) + return error < 0 ? error : -EINVAL; + + return 0; +} + +static int cyapa_gen5_deep_sleep(struct cyapa *cyapa, u8 state) +{ + u8 cmd[] = { 0x05, 0x00, 0x00, 0x08}; + u8 resp_data[5]; + int resp_len; + int error; + + cmd[2] = state & GEN5_DEEP_SLEEP_STATE_MASK; + resp_len = sizeof(resp_data); + error = cyapa_i2c_pip_cmd_irq_sync(cyapa, cmd, sizeof(cmd), + resp_data, &resp_len, + 500, cyapa_gen5_sort_deep_sleep_data, false); + if (error || ((resp_data[3] & GEN5_DEEP_SLEEP_STATE_MASK) != state)) + return -EINVAL; + + return 0; +} + +static int cyapa_gen5_set_power_mode(struct cyapa *cyapa, + u8 power_mode, u16 sleep_time) +{ + struct device *dev = &cyapa->client->dev; + u8 power_state; + int error; + + if (cyapa->state != CYAPA_STATE_GEN5_APP) + return 0; + + /* Dump all the report data before do power mode commmands. */ + cyapa_empty_pip_output_data(cyapa, NULL, NULL, NULL); + + if (GEN5_DEV_GET_PWR_STATE(cyapa) == UNINIT_PWR_MODE) { + /* + * Assume TP in deep sleep mode when driver is loaded, + * avoid driver unload and reload command IO issue caused by TP + * has been set into deep sleep mode when unloading. + */ + GEN5_DEV_SET_PWR_STATE(cyapa, PWR_MODE_OFF); + } + + if (GEN5_DEV_UNINIT_SLEEP_TIME(cyapa) && + GEN5_DEV_GET_PWR_STATE(cyapa) != PWR_MODE_OFF) + if (cyapa_gen5_get_interval_time(cyapa, + GEN5_PARAMETER_LP_INTRVL_ID, + &cyapa->dev_sleep_time) != 0) + GEN5_DEV_SET_SLEEP_TIME(cyapa, UNINIT_SLEEP_TIME); + + if (GEN5_DEV_GET_PWR_STATE(cyapa) == power_mode) { + if (power_mode == PWR_MODE_OFF || + power_mode == PWR_MODE_FULL_ACTIVE || + power_mode == PWR_MODE_BTN_ONLY || + GEN5_DEV_GET_SLEEP_TIME(cyapa) == sleep_time) { + /* Has in correct power mode state, early return. */ + return 0; + } + } + + if (power_mode == PWR_MODE_OFF) { + error = cyapa_gen5_deep_sleep(cyapa, GEN5_DEEP_SLEEP_STATE_OFF); + if (error) { + dev_err(dev, "enter deep sleep fail: %d\n", error); + return error; + } + + GEN5_DEV_SET_PWR_STATE(cyapa, PWR_MODE_OFF); + return 0; + } + + /* + * When trackpad in power off mode, it cannot change to other power + * state directly, must be wake up from sleep firstly, then + * continue to do next power sate change. + */ + if (GEN5_DEV_GET_PWR_STATE(cyapa) == PWR_MODE_OFF) { + error = cyapa_gen5_deep_sleep(cyapa, GEN5_DEEP_SLEEP_STATE_ON); + if (error) { + dev_err(dev, "deep sleep wake fail: %d\n", error); + return error; + } + } + + if (power_mode == PWR_MODE_FULL_ACTIVE) { + error = cyapa_gen5_change_power_state(cyapa, + GEN5_POWER_STATE_ACTIVE); + if (error) { + dev_err(dev, "change to active fail: %d\n", error); + return error; + } + + GEN5_DEV_SET_PWR_STATE(cyapa, PWR_MODE_FULL_ACTIVE); + } else if (power_mode == PWR_MODE_BTN_ONLY) { + error = cyapa_gen5_change_power_state(cyapa, + GEN5_POWER_STATE_BTN_ONLY); + if (error) { + dev_err(dev, "fail to button only mode: %d\n", error); + return error; + } + + GEN5_DEV_SET_PWR_STATE(cyapa, PWR_MODE_BTN_ONLY); + } else { + /* + * Continue to change power mode even failed to set + * interval time, it won't affect the power mode change. + * except the sleep interval time is not correct. + */ + if (GEN5_DEV_UNINIT_SLEEP_TIME(cyapa) || + sleep_time != GEN5_DEV_GET_SLEEP_TIME(cyapa)) + if (cyapa_gen5_set_interval_time(cyapa, + GEN5_PARAMETER_LP_INTRVL_ID, + sleep_time) == 0) + GEN5_DEV_SET_SLEEP_TIME(cyapa, sleep_time); + + if (sleep_time <= GEN5_POWER_READY_MAX_INTRVL_TIME) + power_state = GEN5_POWER_STATE_READY; + else + power_state = GEN5_POWER_STATE_IDLE; + error = cyapa_gen5_change_power_state(cyapa, power_state); + if (error) { + dev_err(dev, "set power state to 0x%02x failed: %d\n", + power_state, error); + return error; + } + + /* + * Disable pip report for a little time, firmware will + * re-enable it automatically. It's used to fix the issue + * that trackpad unable to report signal to wake system up + * in the special situation that system is in suspending, and + * at the same time, user touch trackpad to wake system up. + * This function can avoid the data to be buffured when system + * is suspending which may cause interrput line unable to be + * asserted again. + */ + cyapa_empty_pip_output_data(cyapa, NULL, NULL, NULL); + cyapa_gen5_disable_pip_report(cyapa); + + GEN5_DEV_SET_PWR_STATE(cyapa, + cyapa_sleep_time_to_pwr_cmd(sleep_time)); + } + + return 0; +} + +static bool cyapa_gen5_sort_system_info_data(struct cyapa *cyapa, + u8 *buf, int len) +{ + /* Check the report id and command code */ + if (VALID_CMD_RESP_HEADER(buf, 0x02)) + return true; + + return false; +} + +static int cyapa_gen5_bl_query_data(struct cyapa *cyapa) +{ + u8 bl_query_data_cmd[] = { 0x04, 0x00, 0x0b, 0x00, 0x40, 0x00, + 0x01, 0x3c, 0x00, 0x00, 0xb0, 0x42, 0x17 + }; + u8 resp_data[GEN5_BL_READ_APP_INFO_RESP_LEN]; + int resp_len; + int error; + + resp_len = GEN5_BL_READ_APP_INFO_RESP_LEN; + error = cyapa_i2c_pip_cmd_irq_sync(cyapa, + bl_query_data_cmd, sizeof(bl_query_data_cmd), + resp_data, &resp_len, + 500, cyapa_gen5_sort_tsg_pip_bl_resp_data, false); + if (error || resp_len != GEN5_BL_READ_APP_INFO_RESP_LEN || + !GEN5_CMD_COMPLETE_SUCCESS(resp_data[5])) + return error ? error : -EIO; + + memcpy(&cyapa->product_id[0], &resp_data[8], 5); + cyapa->product_id[5] = '-'; + memcpy(&cyapa->product_id[6], &resp_data[13], 6); + cyapa->product_id[12] = '-'; + memcpy(&cyapa->product_id[13], &resp_data[19], 2); + cyapa->product_id[15] = '\0'; + + cyapa->fw_maj_ver = resp_data[22]; + cyapa->fw_min_ver = resp_data[23]; + + return 0; +} + +static int cyapa_gen5_get_query_data(struct cyapa *cyapa) +{ + u8 get_system_information[] = { + 0x04, 0x00, 0x05, 0x00, 0x2f, 0x00, 0x02 + }; + u8 resp_data[71]; + int resp_len; + u16 product_family; + int error; + + resp_len = sizeof(resp_data); + error = cyapa_i2c_pip_cmd_irq_sync(cyapa, + get_system_information, sizeof(get_system_information), + resp_data, &resp_len, + 2000, cyapa_gen5_sort_system_info_data, false); + if (error || resp_len < sizeof(resp_data)) + return error ? error : -EIO; + + product_family = get_unaligned_le16(&resp_data[7]); + if ((product_family & GEN5_PRODUCT_FAMILY_MASK) != + GEN5_PRODUCT_FAMILY_TRACKPAD) + return -EINVAL; + + cyapa->fw_maj_ver = resp_data[15]; + cyapa->fw_min_ver = resp_data[16]; + + cyapa->electrodes_x = resp_data[52]; + cyapa->electrodes_y = resp_data[53]; + + cyapa->physical_size_x = get_unaligned_le16(&resp_data[54]) / 100; + cyapa->physical_size_y = get_unaligned_le16(&resp_data[56]) / 100; + + cyapa->max_abs_x = get_unaligned_le16(&resp_data[58]); + cyapa->max_abs_y = get_unaligned_le16(&resp_data[60]); + + cyapa->max_z = get_unaligned_le16(&resp_data[62]); + + cyapa->x_origin = resp_data[64] & 0x01; + cyapa->y_origin = resp_data[65] & 0x01; + + cyapa->btn_capability = (resp_data[70] << 3) & CAPABILITY_BTN_MASK; + + memcpy(&cyapa->product_id[0], &resp_data[33], 5); + cyapa->product_id[5] = '-'; + memcpy(&cyapa->product_id[6], &resp_data[38], 6); + cyapa->product_id[12] = '-'; + memcpy(&cyapa->product_id[13], &resp_data[44], 2); + cyapa->product_id[15] = '\0'; + + if (!cyapa->electrodes_x || !cyapa->electrodes_y || + !cyapa->physical_size_x || !cyapa->physical_size_y || + !cyapa->max_abs_x || !cyapa->max_abs_y || !cyapa->max_z) + return -EINVAL; + + return 0; +} + +static int cyapa_gen5_do_operational_check(struct cyapa *cyapa) +{ + struct device *dev = &cyapa->client->dev; + int error; + + if (cyapa->gen != CYAPA_GEN5) + return -ENODEV; + + switch (cyapa->state) { + case CYAPA_STATE_GEN5_BL: + error = cyapa_gen5_bl_exit(cyapa); + if (error) { + /* Rry to update trackpad product information. */ + cyapa_gen5_bl_query_data(cyapa); + goto out; + } + + cyapa->state = CYAPA_STATE_GEN5_APP; + + case CYAPA_STATE_GEN5_APP: + /* + * If trackpad device in deep sleep mode, + * the app command will fail. + * So always try to reset trackpad device to full active when + * the device state is requeried. + */ + error = cyapa_gen5_set_power_mode(cyapa, + PWR_MODE_FULL_ACTIVE, 0); + if (error) + dev_warn(dev, "%s: failed to set power active mode.\n", + __func__); + + /* Get trackpad product information. */ + error = cyapa_gen5_get_query_data(cyapa); + if (error) + goto out; + /* Only support product ID starting with CYTRA */ + if (memcmp(cyapa->product_id, product_id, + strlen(product_id)) != 0) { + dev_err(dev, "%s: unknown product ID (%s)\n", + __func__, cyapa->product_id); + error = -EINVAL; + } + break; + default: + error = -EINVAL; + } + +out: + return error; +} + +/* + * Return false, do not continue process + * Return true, continue process. + */ +static bool cyapa_gen5_irq_cmd_handler(struct cyapa *cyapa) +{ + struct cyapa_gen5_cmd_states *gen5_pip = &cyapa->cmd_states.gen5; + int length; + + if (atomic_read(&gen5_pip->cmd_issued)) { + /* Polling command response data. */ + if (gen5_pip->is_irq_mode == false) + return false; + + /* + * Read out all none command response data. + * these output data may caused by user put finger on + * trackpad when host waiting the command response. + */ + cyapa_i2c_pip_read(cyapa, gen5_pip->irq_cmd_buf, + GEN5_RESP_LENGTH_SIZE); + length = get_unaligned_le16(gen5_pip->irq_cmd_buf); + length = (length <= GEN5_RESP_LENGTH_SIZE) ? + GEN5_RESP_LENGTH_SIZE : length; + if (length > GEN5_RESP_LENGTH_SIZE) + cyapa_i2c_pip_read(cyapa, + gen5_pip->irq_cmd_buf, length); + + if (!(gen5_pip->resp_sort_func && + gen5_pip->resp_sort_func(cyapa, + gen5_pip->irq_cmd_buf, length))) { + /* + * Cover the Gen5 V1 firmware issue. + * The issue is there is no interrut will be + * asserted to notityf host to read a command + * data out when always has finger touch on + * trackpad during the command is issued to + * trackad device. + * This issue has the scenario is that, + * user always has his fingers touched on + * trackpad device when booting/rebooting + * their chrome book. + */ + length = *gen5_pip->resp_len; + cyapa_empty_pip_output_data(cyapa, + gen5_pip->resp_data, + &length, + gen5_pip->resp_sort_func); + if (gen5_pip->resp_len && length != 0) { + *gen5_pip->resp_len = length; + atomic_dec(&gen5_pip->cmd_issued); + complete(&gen5_pip->cmd_ready); + } + return false; + } + + if (gen5_pip->resp_data && gen5_pip->resp_len) { + *gen5_pip->resp_len = (*gen5_pip->resp_len < length) ? + *gen5_pip->resp_len : length; + memcpy(gen5_pip->resp_data, gen5_pip->irq_cmd_buf, + *gen5_pip->resp_len); + } + atomic_dec(&gen5_pip->cmd_issued); + complete(&gen5_pip->cmd_ready); + return false; + } + + return true; +} + +static void cyapa_gen5_report_buttons(struct cyapa *cyapa, + const struct cyapa_gen5_report_data *report_data) +{ + struct input_dev *input = cyapa->input; + u8 buttons = report_data->report_head[GEN5_BUTTONS_OFFSET]; + + buttons = (buttons << CAPABILITY_BTN_SHIFT) & CAPABILITY_BTN_MASK; + + if (cyapa->btn_capability & CAPABILITY_LEFT_BTN_MASK) { + input_report_key(input, BTN_LEFT, + !!(buttons & CAPABILITY_LEFT_BTN_MASK)); + } + if (cyapa->btn_capability & CAPABILITY_MIDDLE_BTN_MASK) { + input_report_key(input, BTN_MIDDLE, + !!(buttons & CAPABILITY_MIDDLE_BTN_MASK)); + } + if (cyapa->btn_capability & CAPABILITY_RIGHT_BTN_MASK) { + input_report_key(input, BTN_RIGHT, + !!(buttons & CAPABILITY_RIGHT_BTN_MASK)); + } + + input_sync(input); +} + +static void cyapa_gen5_report_slot_data(struct cyapa *cyapa, + const struct cyapa_gen5_touch_record *touch) +{ + struct input_dev *input = cyapa->input; + u8 event_id = GEN5_GET_EVENT_ID(touch->touch_tip_event_id); + int slot = GEN5_GET_TOUCH_ID(touch->touch_tip_event_id); + int x, y; + + if (event_id == RECORD_EVENT_LIFTOFF) + return; + + input_mt_slot(input, slot); + input_mt_report_slot_state(input, MT_TOOL_FINGER, true); + x = (touch->x_hi << 8) | touch->x_lo; + if (cyapa->x_origin) + x = cyapa->max_abs_x - x; + input_report_abs(input, ABS_MT_POSITION_X, x); + y = (touch->y_hi << 8) | touch->y_lo; + if (cyapa->y_origin) + y = cyapa->max_abs_y - y; + input_report_abs(input, ABS_MT_POSITION_Y, y); + input_report_abs(input, ABS_MT_PRESSURE, + touch->z); + input_report_abs(input, ABS_MT_TOUCH_MAJOR, + touch->major_axis_len); + input_report_abs(input, ABS_MT_TOUCH_MINOR, + touch->minor_axis_len); + + input_report_abs(input, ABS_MT_WIDTH_MAJOR, + touch->major_tool_len); + input_report_abs(input, ABS_MT_WIDTH_MINOR, + touch->minor_tool_len); + + input_report_abs(input, ABS_MT_ORIENTATION, + touch->orientation); +} + +static void cyapa_gen5_report_touches(struct cyapa *cyapa, + const struct cyapa_gen5_report_data *report_data) +{ + struct input_dev *input = cyapa->input; + unsigned int touch_num; + int i; + + touch_num = report_data->report_head[GEN5_NUMBER_OF_TOUCH_OFFSET] & + GEN5_NUMBER_OF_TOUCH_MASK; + + for (i = 0; i < touch_num; i++) + cyapa_gen5_report_slot_data(cyapa, + &report_data->touch_records[i]); + + input_mt_sync_frame(input); + input_sync(input); +} + +static int cyapa_gen5_irq_handler(struct cyapa *cyapa) +{ + struct device *dev = &cyapa->client->dev; + struct cyapa_gen5_report_data report_data; + int ret; + u8 report_id; + unsigned int report_len; + + if (cyapa->gen != CYAPA_GEN5 || + cyapa->state != CYAPA_STATE_GEN5_APP) { + dev_err(dev, "invalid device state, gen=%d, state=0x%02x\n", + cyapa->gen, cyapa->state); + return -EINVAL; + } + + ret = cyapa_i2c_pip_read(cyapa, (u8 *)&report_data, + GEN5_RESP_LENGTH_SIZE); + if (ret != GEN5_RESP_LENGTH_SIZE) { + dev_err(dev, "failed to read length bytes, (%d)\n", ret); + return -EINVAL; + } + + report_len = get_unaligned_le16( + &report_data.report_head[GEN5_RESP_LENGTH_OFFSET]); + if (report_len < GEN5_RESP_LENGTH_SIZE) { + /* Invliad length or internal reset happened. */ + dev_err(dev, "invalid report_len=%d. bytes: %02x %02x\n", + report_len, report_data.report_head[0], + report_data.report_head[1]); + return -EINVAL; + } + + /* Idle, no data for report. */ + if (report_len == GEN5_RESP_LENGTH_SIZE) + return 0; + + ret = cyapa_i2c_pip_read(cyapa, (u8 *)&report_data, report_len); + if (ret != report_len) { + dev_err(dev, "failed to read %d bytes report data, (%d)\n", + report_len, ret); + return -EINVAL; + } + + report_id = report_data.report_head[GEN5_RESP_REPORT_ID_OFFSET]; + if (report_id == GEN5_WAKEUP_EVENT_REPORT_ID && + report_len == GEN5_WAKEUP_EVENT_SIZE) { + /* + * Device wake event from deep sleep mode for touch. + * This interrupt event is used to wake system up. + */ + return 0; + } else if (report_id != GEN5_TOUCH_REPORT_ID && + report_id != GEN5_BTN_REPORT_ID && + report_id != GEN5_OLD_PUSH_BTN_REPORT_ID && + report_id != GEN5_PUSH_BTN_REPORT_ID) { + /* Running in BL mode or unknown response data read. */ + dev_err(dev, "invalid report_id=0x%02x\n", report_id); + return -EINVAL; + } + + if (report_id == GEN5_TOUCH_REPORT_ID && + (report_len < GEN5_TOUCH_REPORT_HEAD_SIZE || + report_len > GEN5_TOUCH_REPORT_MAX_SIZE)) { + /* Invalid report data length for finger packet. */ + dev_err(dev, "invalid touch packet length=%d\n", report_len); + return 0; + } + + if ((report_id == GEN5_BTN_REPORT_ID || + report_id == GEN5_OLD_PUSH_BTN_REPORT_ID || + report_id == GEN5_PUSH_BTN_REPORT_ID) && + (report_len < GEN5_BTN_REPORT_HEAD_SIZE || + report_len > GEN5_BTN_REPORT_MAX_SIZE)) { + /* Invalid report data length of button packet. */ + dev_err(dev, "invalid button packet length=%d\n", report_len); + return 0; + } + + if (report_id == GEN5_TOUCH_REPORT_ID) + cyapa_gen5_report_touches(cyapa, &report_data); + else + cyapa_gen5_report_buttons(cyapa, &report_data); + + return 0; +} + +const struct cyapa_dev_ops cyapa_gen5_ops = { + .initialize = cyapa_gen5_initialize, + + .state_parse = cyapa_gen5_state_parse, + .operational_check = cyapa_gen5_do_operational_check, + + .irq_handler = cyapa_gen5_irq_handler, + .irq_cmd_handler = cyapa_gen5_irq_cmd_handler, + .sort_empty_output_data = cyapa_empty_pip_output_data, + .set_power_mode = cyapa_gen5_set_power_mode, +}; |