usb: typec: ucsi: ccg: add firmware flashing support

From: Ajay Gupta <[email protected]>

CCGx has two copies of the firmware in addition to the bootloader. If the device is running FW1, FW2 can be updated with the new version. Dual firmware mode allows the CCG device to stay in a PD contract and support USB PD and Type-C functionality while a firmware update is in progress.

First we read the currently flashed firmware version of both primary and secondary firmware and then compare it with version of firmware file to determine if flashing is required.

Command framework is added to support sending commands to CCGx controller. We wait for response after sending the command and then read the response from RAB_RESPONSE register.

Below commands are supported,
- ENTER_FLASHING
- RESET
- PDPORT_ENABLE
- JUMP_TO_BOOT
- FLASH_ROW_RW
- VALIDATE_FW

Command specific mutex lock is also added to sync between driver and user threads.

PD port number information is added which is required while sending PD_PORT_ENABLE command

Signed-off-by Ajay Gupta <[email protected]>

Signed-off-by Heikki Krogerus <[email protected]>

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Changes from v7->v8
- Fixed comments from Greg by dropping do_flash_show()