102 lines
3.6 KiB
C
102 lines
3.6 KiB
C
/**
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* @file
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* @brief USB Mass Storage Class public header
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*
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* Header follows the Mass Storage Class Specification
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* (Mass_Storage_Specification_Overview_v1.4_2-19-2010.pdf) and
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* Mass Storage Class Bulk-Only Transport Specification
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* (usbmassbulk_10.pdf).
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* Header is limited to Bulk-Only Transfer protocol.
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*/
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#ifndef _USBD_MSC_H__
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#define _USBD_MSC_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* MSC Subclass Codes */
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#define MSC_SUBCLASS_RBC 0x01
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#define MSC_SUBCLASS_SFF8020I_MMC2 0x02
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#define MSC_SUBCLASS_QIC157 0x03
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#define MSC_SUBCLASS_UFI 0x04
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#define MSC_SUBCLASS_SFF8070I 0x05
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#define MSC_SUBCLASS_SCSI 0x06
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/* MSC Protocol Codes */
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#define MSC_PROTOCOL_CBI_INT 0x00
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#define MSC_PROTOCOL_CBI_NOINT 0x01
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#define MSC_PROTOCOL_BULK_ONLY 0x50
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/* MSC Request Codes */
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#define MSC_REQUEST_RESET 0xFF
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#define MSC_REQUEST_GET_MAX_LUN 0xFE
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/** MSC Command Block Wrapper (CBW) Signature */
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#define MSC_CBW_Signature 0x43425355
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/** Bulk-only Command Status Wrapper (CSW) Signature */
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#define MSC_CSW_Signature 0x53425355
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/** MSC Command Block Status Values */
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#define CSW_STATUS_CMD_PASSED 0x00
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#define CSW_STATUS_CMD_FAILED 0x01
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#define CSW_STATUS_PHASE_ERROR 0x02
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/** MSC Bulk-Only Command Block Wrapper (CBW) */
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struct CBW {
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uint32_t Signature;
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uint32_t Tag;
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uint32_t DataLength;
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uint8_t Flags;
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uint8_t LUN;
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uint8_t CBLength;
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uint8_t CB[16];
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} __packed;
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/** MSC Bulk-Only Command Status Wrapper (CSW) */
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struct CSW {
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uint32_t Signature;
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uint32_t Tag;
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uint32_t DataResidue;
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uint8_t Status;
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} __packed;
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/*Length of template descriptor: 23 bytes*/
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#define MSC_DESCRIPTOR_LEN (9 + 7 + 7)
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#define MSC_DESCRIPTOR_INIT(bFirstInterface, out_ep, in_ep, str_idx) \
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/* Interface */ \
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0x09, /* bLength */ \
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USB_DESCRIPTOR_TYPE_INTERFACE, /* bDescriptorType */ \
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bFirstInterface, /* bInterfaceNumber */ \
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0x00, /* bAlternateSetting */ \
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0x02, /* bNumEndpoints */ \
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USB_DEVICE_CLASS_MASS_STORAGE, /* bInterfaceClass */ \
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MSC_SUBCLASS_SCSI, /* bInterfaceSubClass */ \
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MSC_PROTOCOL_BULK_ONLY, /* bInterfaceProtocol */ \
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str_idx, /* iInterface */ /* Endpoint Out */ \
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0x07, /* bLength */ \
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USB_DESCRIPTOR_TYPE_ENDPOINT, /* bDescriptorType */ \
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out_ep, /* bEndpointAddress */ \
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0x02, /* bmAttributes */ \
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0x40, 0x00, /* wMaxPacketSize */ \
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0x01, /* bInterval */ /* Endpoint In */ \
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0x07, /* bLength */ \
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USB_DESCRIPTOR_TYPE_ENDPOINT, /* bDescriptorType */ \
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in_ep, /* bEndpointAddress */ \
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0x02, /* bmAttributes */ \
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0x40, 0x00, /* wMaxPacketSize */ \
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0x01 /* bInterval */
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void usbd_msc_class_init(uint8_t out_ep, uint8_t in_ep);
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void usbd_msc_get_cap(uint8_t lun, uint32_t *block_num, uint16_t *block_size);
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int usbd_msc_sector_read(uint32_t sector, uint8_t *buffer, uint32_t length);
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int usbd_msc_sector_write(uint32_t sector, uint8_t *buffer, uint32_t length);
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#ifdef __cplusplus
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}
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#endif
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#endif /* USB_MSC_H_ */
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