diff options
Diffstat (limited to 'chip/stm32/usb_spi.h')
| -rw-r--r-- | chip/stm32/usb_spi.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/chip/stm32/usb_spi.h b/chip/stm32/usb_spi.h index a1be2c11fb..fa86ba3651 100644 --- a/chip/stm32/usb_spi.h +++ b/chip/stm32/usb_spi.h @@ -232,6 +232,30 @@ * * packet id: 2 byte enum USB_SPI_PKT_ID_CMD_RESTART_RESPONSE * + * Command chip select Packet (Host to Device): + * + * +----------------+-------------+ + * | packet id : 2B | action : 2B | + * +----------------+-------------+ + * + * packet id: 2 byte enum USB_SPI_PKT_ID_CMD_CHIP_SELECT + * + * action: 2 byte, current options: + * 0: Deassert chip select + * 1: Assert chip select + * + * Response chip select Packet (Device to Host): + * + * +----------------+------------------+ + * | packet id : 2B | status code : 2B | + * +----------------+------------------+ + * + * packet id: 2 byte enum USB_SPI_PKT_ID_RSP_CHIP_SELECT + * + * status code: 2 byte status code + * 0x0000: Success + * others: Error + * * USB Error Codes: * * send_command return codes have the following format: @@ -280,6 +304,12 @@ enum packet_id_type { USB_SPI_PKT_ID_RSP_TRANSFER_START = 5, /* Additional packets containing read payload. */ USB_SPI_PKT_ID_RSP_TRANSFER_CONTINUE = 6, + /* + * Request assertion or deassertion of chip select + */ + USB_SPI_PKT_ID_CMD_CHIP_SELECT = 7, + /* Response to above request. */ + USB_SPI_PKT_ID_RSP_CHIP_SELECT = 8, }; enum feature_bitmap { @@ -314,6 +344,21 @@ struct usb_spi_continue_v2 { uint8_t data[USB_SPI_PAYLOAD_SIZE_V2_CONTINUE]; } __packed; +enum chip_select_flags { + /* Indicates chip select should be asserted. */ + USB_SPI_CHIP_SELECT = BIT(0) +}; + +struct usb_spi_chip_select_command { + uint16_t packet_id; + uint16_t flags; +} __packed; + +struct usb_spi_chip_select_response { + uint16_t packet_id; + uint16_t status_code; +} __packed; + struct usb_spi_packet_ctx { union { uint8_t bytes[USB_MAX_PACKET_SIZE]; @@ -323,6 +368,8 @@ struct usb_spi_packet_ctx { struct usb_spi_response_configuration_v2 rsp_config; struct usb_spi_response_v2 rsp_start; struct usb_spi_continue_v2 rsp_continue; + struct usb_spi_chip_select_command cmd_cs; + struct usb_spi_chip_select_response rsp_cs; } __packed; /* * By storing the number of bytes in the header and knowing that the @@ -392,6 +439,8 @@ enum usb_spi_mode { USB_SPI_MODE_IDLE = 0, /* Indicates the device needs to send it's USB SPI configuration.*/ USB_SPI_MODE_SEND_CONFIGURATION, + /* Indicates the device needs to respond to chip select. */ + USB_SPI_MODE_SEND_CHIP_SELECT_RESPONSE, /* Indicates we device needs start the SPI transfer. */ USB_SPI_MODE_START_SPI, /* Indicates we should start a transfer response. */ |