[PATCH v2 1/5] efi: usb: add header for usb-efi

Convert the spec in [1] to a header, that is useable for barebox.
The async headers are not defined, since it is currently not planned to
support async in addition to sync.

[1] https://uefi.org/specs/UEFI/2.11/17_Protocols_USB_Support.html

Signed-off-by: Fabian Pflug <[email protected]>

---
v2:
- Fixed wrong type in header for get_string_descriptor
---
 include/efi/protocol/usb.h | 66 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)

diff --git a/include/efi/protocol/usb.h b/include/efi/protocol/usb.h
new file mode 100644
index 0000000000..78953a4fa7
--- /dev/null
+++ b/include/efi/protocol/usb.h
@@ -0,0 +1,66 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __EFI_PROTOCOL_USB_H_
+#define __EFI_PROTOCOL_USB_H_
+
+#include <efi/types.h>
+#include <linux/usb/usb.h>
+
+enum efi_usb_data_direction {
+	EFI_USB_DATA_IN,
+	EFI_USB_DATA_OUT,
+	EFI_USB_NO_DATA
+};
+
+//
+// Error code for USB Transfer Results
+//
+#define EFI_USB_NOERROR 0x0000
+#define EFI_USB_ERR_NOTEXECUTE 0x0001
+#define EFI_USB_ERR_STALL 0x0002
+#define EFI_USB_ERR_BUFFER 0x0004
+#define EFI_USB_ERR_BABBLE 0x0008
+#define EFI_USB_ERR_NAK 0x0010
+#define EFI_USB_ERR_CRC 0x0020
+#define EFI_USB_ERR_TIMEOUT 0x0040
+#define EFI_USB_ERR_BITSTUFF 0x0080
+#define EFI_USB_ERR_SYSTEM 0x0100
+
+struct efi_usb_io_protocol {
+	efi_status_t(EFIAPI *control_transfer)(
+		struct efi_usb_io_protocol *this, struct devrequest *request,
+		enum efi_usb_data_direction direction, u32 timeout, void *data,
+		efi_uintn_t length, u32 *status);
+	efi_status_t(EFIAPI *bulk_transfer)(struct efi_usb_io_protocol *this,
+					    u8 device_endpoint, void *data,
+					    efi_uintn_t *length,
+					    efi_uintn_t timeout, u32 *status);
+	void *usb_io_async_interrupt_transfer;
+	efi_status_t(EFIAPI *sync_interrupt_transfer)(
+		struct efi_usb_io_protocol *this, u8 device_endpoint,
+		void *data, efi_uintn_t *length, efi_uintn_t timeout,
+		u32 *status);
+	void *efi_usb_io_isochronous_transfer;
+	void *efi_usb_io_async_isochronous_transfer;
+	efi_status_t(EFIAPI *get_device_descriptor)(
+		struct efi_usb_io_protocol *this,
+		struct usb_device_descriptor *desc);
+	efi_status_t(EFIAPI *get_config_descriptor)(
+		struct efi_usb_io_protocol *this,
+		struct usb_config_descriptor *desc);
+	efi_status_t(EFIAPI *get_interface_descriptor)(
+		struct efi_usb_io_protocol *this,
+		struct usb_interface_descriptor *desc);
+	efi_status_t(EFIAPI *get_endpoint_descriptor)(
+		struct efi_usb_io_protocol *this, u8 index,
+		struct usb_endpoint_descriptor *desc);
+	efi_status_t(EFIAPI *get_string_descriptor)(
+		struct efi_usb_io_protocol *this, u16 lang_id, u8 string_id,
+		wchar_t **desc);
+	efi_status_t(EFIAPI *get_supported_languages)(
+		struct efi_usb_io_protocol *this, u16 **lang_id_table,
+		u16 *table_size);
+	efi_status_t(EFIAPI *port_reset)(struct efi_usb_io_protocol *this);
+};
+
+#endif

-- 
2.47.3