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usb-storage: prepare for subdriver separation

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This patch (as1206) is the first step in converting usb-storage's
subdrivers into separate modules.  It makes the following large-scale
changes:

	Remove a bunch of unnecessary #ifdef's from usb_usual.h.
	Not truly necessary, but it does clean things up.

	Move the USB device-ID table (which is duplicated between
	libusual and usb-storage) into its own source file,
	usual-tables.c, and arrange for this to be linked with
	either libusual or usb-storage according to whether
	USB_LIBUSUAL is configured.

	Add to usual-tables.c a new usb_usual_ignore_device()
	function to detect whether a particular device needs to be
	managed by a subdriver and not by the standard handlers
	in usb-storage.

	Export a whole bunch of functions in usb-storage, renaming
	some of them because their names don't already begin with
	"usb_stor_".  These functions will be needed by the new
	subdriver modules.

	Split usb-storage's probe routine into two functions.
	The subdrivers will call the probe1 routine, then fill in
	their transport and protocol settings, and then call the
	probe2 routine.

	Take the default cases and error checking out of
	get_transport() and get_protocol(), which run during
	probe1, and instead put a check for invalid transport
	or protocol values into the probe2 function.

	Add a new probe routine to be used for standard devices,
	i.e., those that don't need a subdriver.  This new routine
	checks whether the device should be ignored (because it
	should be handled by ub or by a subdriver), and if not,
	calls the probe1 and probe2 functions.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: Matthew Dharm <mdharm-usb@one-eyed-alien.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern
2009-02-12 14:47:44 -05:00
committed by Greg Kroah-Hartman
parent e4abe6658a
commit e6e244b6cb
10 changed files with 261 additions and 151 deletions
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21
include/linux/usb_usual.h
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@@ -96,39 +96,26 @@ enum { US_DO_ALL_FLAGS };
#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
#ifdef CONFIG_USB_STORAGE_ALAUDA
#define US_PR_ALAUDA 0xf4 /* Alauda chipsets */
#endif
#ifdef CONFIG_USB_STORAGE_KARMA
#define US_PR_KARMA 0xf5 /* Rio Karma */
#endif
#define US_PR_DEVICE 0xff /* Use device's value */
/*
*/
extern int usb_usual_ignore_device(struct usb_interface *intf);
extern struct usb_device_id usb_storage_usb_ids[];
#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);