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/* Driver for USB scsi - include file
*
* (C) Michael Gee (michael@linuxspecific.com) 1999
*
* This driver is scitzoid - it make a USB scanner appear as both a SCSI device
* and a character device. The latter is only available if the device has an
* interrupt endpoint, and is used specifically to receive interrupt events.
*
* In order to support various 'strange' scanners, this module supports plug in
* device specific filter modules, which can do their own thing when required.
*
*/
#define USB_SCSI "usbscsi: "
extern int usbscsi_debug;
#ifdef CONFIG_USB_SCSI_DEBUG
void us_show_command(Scsi_Cmnd *srb);
#define US_DEBUGP(x...) { if(usbscsi_debug) printk( KERN_DEBUG USB_SCSI ## x ); }
#define US_DEBUGPX(x...) { if(usbscsi_debug) printk( ## x ); }
#define US_DEBUG(x) { if(usbscsi_debug) x; }
#else
#define US_DEBUGP(x...)
#define US_DEBUGPX(x...)
#define US_DEBUG(x)
#endif
/* bit set if input */
extern unsigned char us_direction[256/8];
#define US_DIRECTION(x) ((us_direction[x>>3] >> (x & 7)) & 1)
/* Sub Classes */
#define US_SC_RBC 1 /* Typically, flash devices */
#define US_SC_8020 2 /* CD-ROM */
#define US_SC_QIC 3 /* QIC-157 Tapes */
#define US_SC_UFI 4 /* Floppy */
#define US_SC_8070 5 /* Removable media */
#define US_SC_SCSI 6 /* Transparent */
#define US_SC_MIN US_SC_RBC
#define US_SC_MAX US_SC_SCSI
/* Protocols */
#define US_PR_CB 1 /* Control/Bulk w/o interrupt */
#define US_PR_CBI 0 /* Control/Bulk/Interrupt */
#define US_PR_ZIP 0x50 /* bulk only */
/* #define US_PR_BULK ?? */
/*
* Bulk only data structures (Zip 100, for example)
*/
struct bulk_cb_wrap {
__u32 Signature; /* contains 'USBC' */
__u32 Tag; /* unique per command id */
__u32 DataTransferLength; /* size of data */
__u8 Flags; /* direction in bit 0 */
__u8 Lun; /* LUN normally 0 */
__u8 Length; /* of of the CDB */
__u8 CDB[16]; /* max command */
};
#define US_BULK_CB_WRAP_LEN 31
#define US_BULK_CB_SIGN 0x43425355
#define US_BULK_FLAG_IN 1
#define US_BULK_FLAG_OUT 0
struct bulk_cs_wrap {
__u32 Signature; /* should = 'USBS' */
__u32 Tag; /* same as original command */
__u32 Residue; /* amount not transferred */
__u8 Status; /* see below */
__u8 Filler[18];
};
#define US_BULK_CS_WRAP_LEN 31
#define US_BULK_CS_SIGN 0x53425355
#define US_BULK_STAT_OK 0
#define US_BULK_STAT_FAIL 1
#define US_BULK_STAT_PHASE 2
#define US_BULK_RESET 0xff
#define US_BULK_RESET_SOFT 1
#define US_BULK_RESET_HARD 0
/*
* CBI style
*/
#define US_CBI_ADSC 0
/*
* Filter device definitions
*/
struct usb_scsi_filter {
struct usb_scsi_filter * next; /* usb_scsi driver only */
char *name; /* not really required */
unsigned int flags; /* Filter flags */
void * (* probe) (struct usb_device *, char *, char *, char *); /* probe device */
void (* release)(void *); /* device gone */
int (* command)(void *, Scsi_Cmnd *); /* all commands */
};
#define GUID(x) __u32 x[3]
#define GUID_EQUAL(x, y) (x[0] == y[0] && x[1] == y[1] && x[2] == y[2])
#define GUID_CLEAR(x) x[0] = x[1] = x[2] = 0;
#define GUID_NONE(x) (!x[0] && !x[1] && !x[2])
#define GUID_FORMAT "%08x%08x%08x"
#define GUID_ARGS(x) x[0], x[1], x[2]
static inline void make_guid( __u32 *pg, __u16 vendor, __u16 product, char *serial)
{
pg[0] = (vendor << 16) | product;
pg[1] = pg[2] = 0;
while (*serial) {
pg[1] <<= 4;
pg[1] |= pg[2] >> 28;
pg[2] <<= 4;
if (*serial >= 'a')
*serial -= 'a' - 'A';
pg[2] |= (*serial <= '9' && *serial >= '0') ? *serial - '0'
: *serial - 'A' + 10;
serial++;
}
}
/* Flag definitions */
#define US_FL_IP_STATUS 0x00000001 /* status uses interrupt */
#define US_FL_FIXED_COMMAND 0x00000002 /* expand commands to fixed size */
/*
* Called by filters to register/unregister the mini driver
*
* WARNING - the supplied probe function may be called before exiting this fn
*/
int usb_scsi_register(struct usb_scsi_filter *);
void usb_scsi_deregister(struct usb_scsi_filter *);
#ifdef CONFIG_USB_HP4100
int hp4100_init(void);
#endif
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