diff options
Diffstat (limited to 'drivers/usb/usb_scsi.h')
| -rw-r--r-- | drivers/usb/usb_scsi.h | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/drivers/usb/usb_scsi.h b/drivers/usb/usb_scsi.h new file mode 100644 index 000000000..58367d852 --- /dev/null +++ b/drivers/usb/usb_scsi.h @@ -0,0 +1,145 @@ +/* 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 |