usb-msc-bulk.h

00001 #ifndef __USB_MSC_BULK_H__SHSP6ONHDJ__
00002 #define __USB_MSC_BULK_H__SHSP6ONHDJ__
00003 
00004 #include <usb.h>
00005 #include <stdint.h>
00006 #include <msc/msc-defs.h>
00007 
00008 #define USB_MSC_BUFFERS 16
00009 
00010 
00011 struct usb_msc_bulk_cbw
00012 {
00013   uint32_t dCBWSignature;
00014   uint32_t dCBWTag;
00015   uint32_t dCBWDataTransferLength;
00016   uint8_t bmCBWFlags;
00017   uint8_t bCBWLUN;
00018   uint8_t bCBWCBLength;
00019   uint8_t CBWCB[16];
00020 } BYTE_ALIGNED;
00021 
00022 struct usb_msc_bulk_csw
00023 {
00024   uint32_t dCSWSignature;
00025   uint32_t dCSWTag;
00026   uint32_t dCSWDataResidue;
00027   uint8_t bCSWStatus;
00028 } BYTE_ALIGNED;
00029 
00030 struct usb_msc_command_state
00031 {
00032   const uint8_t *command;
00033   unsigned int command_length;
00034   unsigned int status;
00035   /* Number of data bytes received or sent */
00036   unsigned int cmd_data_transfered; 
00037   /* Number of data bytes submitted for transmition or reception */
00038   unsigned int cmd_data_submitted;
00039   /* Set by command handler or callback */
00040   void (*data_cb)(struct usb_msc_command_state *state); /* May be NULL */
00041 };
00042 
00043 void
00044 usb_msc_bulk_setup();
00045 
00046 typedef enum {
00047   USB_MSC_HANDLER_OK = 0,
00048   USB_MSC_HANDLER_DELAYED,
00049   USB_MSC_HANDLER_FAILED
00050 } usb_msc_handler_status;
00051 
00052 usb_msc_handler_status
00053 usb_msc_handle_command(struct usb_msc_command_state *state);
00054      
00055 void
00056 usb_msc_command_handler_init();
00057 
00058 /* Call data_cb when this data has been sent or received */
00059 #define USB_MSC_DATA_DO_CALLBACK 0x20
00060 
00061 /* Actually send the data, not just buffer it */
00062 #define USB_MSC_DATA_SEND 0x40
00063 
00064 /* Actually receive the data, not just queue buffers for it */
00065 #define USB_MSC_DATA_RECEIVE 0x40
00066 
00067 /* The command don't want to send or receive anymore data */
00068 #define USB_MSC_DATA_LAST 0x80
00069 
00070 /* Submit a buffer with data to send to the host. Use a callback to be
00071    notified when data has been sent. Data is not copied so it must
00072    remain constant while sending. */
00073 void
00074 usb_msc_send_data(const uint8_t *data, unsigned int len, unsigned int flags);
00075 
00076 /* Same as usb_msc_send_data but allows one to set additional flags
00077    in USBBuffer */
00078 void
00079 usb_msc_send_data_buf_flags(const uint8_t *data, unsigned int len,
00080                             unsigned int flags, uint16_t buf_flags);
00081 
00082 #define USB_MSC_SEND_ABORT() \
00083 usb_msc_send_data_buf_flags(NULL, 0, USB_MSC_DATA_LAST, 0)
00084 
00085 /* Submit a buffer for receiving data from the host. Use a callback to
00086    be notified when data has arrived. */
00087 void
00088 usb_msc_receive_data(uint8_t *data, unsigned int len, unsigned int flags);
00089 
00090 /* Same as usb_msc_receive_data but allows one to set additional flags
00091    in USBBuffer */
00092 void
00093 usb_msc_receive_data_buf_flags(uint8_t *data, unsigned int len,
00094                                unsigned int flags, uint16_t buf_flags);
00095 #define USB_MSC_RECEIVE_ABORT() \
00096   usb_msc_receive_data_buf_flags(NULL, 0, USB_MSC_DATA_LAST, 0)
00097 
00098 #define USB_MSC_DONE() \
00099   usb_msc_send_data_buf_flags(NULL, 0, USB_MSC_DATA_LAST, 0)
00100 
00101 
00102 
00103 #endif /* __USB_MSC_BULK_H__SHSP6ONHDJ__ */

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