[PATCH] USB: drivers/usb/storage/libusual

This patch adds a shim driver libusual, which routes devices between
usb-storage and ub according to the common table, based on unusual_devs.h.
The help and example syntax is in Kconfig.

Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 123 insertions, 0 deletions

diff --git a/include/linux/usb_usual.h b/include/linux/usb_usual.h
new file mode 100644
index 000000000000..f9c058f33712
--- /dev/null
+++ b/include/linux/usb_usual.h
@@ -0,0 +1,123 @@
+/*
+ * Interface to the libusual.
+ *
+ * Copyright (c) 2005 Pete Zaitcev <zaitcev@redhat.com>
+ * Copyright (c) 1999-2002 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
+ * Copyright (c) 1999 Michael Gee (michael@linuxspecific.com)
+ */
+
+#ifndef __LINUX_USB_USUAL_H
+#define __LINUX_USB_USUAL_H
+
+#include <linux/config.h>
+
+/* We should do this for cleanliness... But other usb_foo.h do not do this. */
+/* #include <linux/usb.h> */
+
+/*
+ * The flags field, which we store in usb_device_id.driver_info.
+ * It is compatible with the old usb-storage flags in lower 24 bits.
+ */
+
+/*
+ * Static flag definitions.  We use this roundabout technique so that the
+ * proc_info() routine can automatically display a message for each flag.
+ */
+#define US_DO_ALL_FLAGS                                         \
+        US_FLAG(SINGLE_LUN,     0x00000001)                     \
+                /* allow access to only LUN 0 */                \
+        US_FLAG(NEED_OVERRIDE,  0x00000002)                     \
+                /* unusual_devs entry is necessary */           \
+        US_FLAG(SCM_MULT_TARG,  0x00000004)                     \
+                /* supports multiple targets */                 \
+        US_FLAG(FIX_INQUIRY,    0x00000008)                     \
+                /* INQUIRY response needs faking */             \
+        US_FLAG(FIX_CAPACITY,   0x00000010)                     \
+                /* READ CAPACITY response too big */            \
+        US_FLAG(IGNORE_RESIDUE, 0x00000020)                     \
+                /* reported residue is wrong */                 \
+        US_FLAG(BULK32,         0x00000040)                     \
+                /* Uses 32-byte CBW length */                   \
+        US_FLAG(NOT_LOCKABLE,   0x00000080)                     \
+                /* PREVENT/ALLOW not supported */               \
+        US_FLAG(GO_SLOW,        0x00000100)                     \
+                /* Need delay after Command phase */            \
+        US_FLAG(NO_WP_DETECT,   0x00000200)                     \
+                /* Don't check for write-protect */             \
+
+#define US_FLAG(name, value)    US_FL_##name = value ,
+enum { US_DO_ALL_FLAGS };
+#undef US_FLAG
+
+/*
+ * The bias field for libusual and friends.
+ */
+#define USB_US_TYPE_NONE   0
+#define USB_US_TYPE_STOR   1            /* usb-storage */
+#define USB_US_TYPE_UB     2            /* ub */
+
+#define USB_US_TYPE(flags)              (((flags) >> 24) & 0xFF)
+#define USB_US_ORIG_FLAGS(flags)        ((flags) & 0x00FFFFFF)
+
+/*
+ * This is probably not the best place to keep these constants, conceptually.
+ * But it's the only header included into all places which need them.
+ */
+
+/* Sub Classes */
+
+#define US_SC_RBC       0x01            /* Typically, flash devices */
+#define US_SC_8020      0x02            /* CD-ROM */
+#define US_SC_QIC       0x03            /* QIC-157 Tapes */
+#define US_SC_UFI       0x04            /* Floppy */
+#define US_SC_8070      0x05            /* Removable media */
+#define US_SC_SCSI      0x06            /* Transparent */
+#define US_SC_ISD200    0x07            /* ISD200 ATA */
+#define US_SC_MIN       US_SC_RBC
+#define US_SC_MAX       US_SC_ISD200
+
+#define US_SC_DEVICE    0xff            /* Use device's value */
+
+/* Protocols */
+
+#define US_PR_CBI       0x00            /* Control/Bulk/Interrupt */
+#define US_PR_CB        0x01            /* Control/Bulk w/o interrupt */
+#define US_PR_BULK      0x50            /* bulk only */
+#ifdef CONFIG_USB_STORAGE_USBAT
+#define US_PR_USBAT     0x80            /* SCM-ATAPI bridge */
+#endif
+#ifdef CONFIG_USB_STORAGE_SDDR09
+#define US_PR_EUSB_SDDR09       0x81    /* SCM-SCSI bridge for SDDR-09 */
+#endif
+#ifdef CONFIG_USB_STORAGE_SDDR55
+#define US_PR_SDDR55    0x82            /* SDDR-55 (made up) */
+#endif
+#define US_PR_DPCM_USB  0xf0            /* Combination CB/SDDR09 */
+#ifdef CONFIG_USB_STORAGE_FREECOM
+#define US_PR_FREECOM   0xf1            /* Freecom */
+#endif
+#ifdef CONFIG_USB_STORAGE_DATAFAB
+#define US_PR_DATAFAB   0xf2            /* Datafab chipsets */
+#endif
+#ifdef CONFIG_USB_STORAGE_JUMPSHOT
+#define US_PR_JUMPSHOT  0xf3            /* Lexar Jumpshot */
+#endif
+
+#define US_PR_DEVICE    0xff            /* Use device's value */
+
+/*
+ */
+#ifdef CONFIG_USB_LIBUSUAL
+
+extern struct usb_device_id storage_usb_ids[];
+extern void usb_usual_set_present(int type);
+extern void usb_usual_clear_present(int type);
+extern int usb_usual_check_type(const struct usb_device_id *, int type);
+#else
+
+#define usb_usual_set_present(t)        do { } while(0)
+#define usb_usual_clear_present(t)      do { } while(0)
+#define usb_usual_check_type(id, t)     (0)
+#endif /* CONFIG_USB_LIBUSUAL */
+
+#endif /* __LINUX_USB_USUAL_H */