Initial support for booting from USB drives.

This patch adds initial support for USB Mass Storage Controllers.
This includes support for bulk transfers on UHCI controllers.
Code to detect a USB MSC device is added, and wrappers for sending
    "cdb" block commands over USB are added.
The scsi "inquiry" command is also added.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/block.c b/src/block.c
index 365053eb..3b43f97a 100644
--- a/src/block.c
+++ b/src/block.c
@@ -10,6 +10,7 @@
 #include "cmos.h" // inb_cmos
 #include "util.h" // dprintf
 #include "ata.h" // process_ata_op
+#include "usb-msc.h" // process_usb_op
 
 struct drives_s Drives VAR16VISIBLE;
 
@@ -280,6 +281,9 @@ describe_drive(struct drive_s *drive_g)
     case DTYPE_RAMDISK:
         describe_ramdisk(drive_g);
         break;
+    case DTYPE_USB:
+        describe_usb(drive_g);
+        break;
     default:
         printf("Unknown");
         break;
@@ -308,6 +312,8 @@ process_op(struct disk_op_s *op)
         return process_ramdisk_op(op);
     case DTYPE_CDEMU:
         return process_cdemu_op(op);
+    case DTYPE_USB:
+        return process_usb_op(op);
     default:
         op->count = 0;
         return DISK_RET_EPARAM;