116 lines
2.2 KiB
C
116 lines
2.2 KiB
C
/*
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* This file is part of the UCB release of Plan 9. It is subject to the license
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* terms in the LICENSE file found in the top-level directory of this
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* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
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* part of the UCB release of Plan 9, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms contained
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* in the LICENSE file.
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*/
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/*
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* mass storage transport protocols and subclasses,
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* from usb mass storage class specification overview rev 1.2
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*/
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typedef struct Umsc Umsc;
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typedef struct Ums Ums;
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typedef struct Cbw Cbw; /* command block wrapper */
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typedef struct Csw Csw; /* command status wrapper */
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enum
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{
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Protocbi = 0, /* control/bulk/interrupt; mainly floppies */
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Protocb = 1, /* " with no interrupt; mainly floppies */
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Protobulk = 0x50, /* bulk only */
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Subrbc = 1, /* reduced blk cmds */
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Subatapi = 2, /* cd/dvd using sff-8020i or mmc-2 cmd blks */
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Subqic = 3, /* QIC-157 tapes */
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Subufi = 4, /* floppy */
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Sub8070 = 5, /* removable media, atapi-like */
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Subscsi = 6, /* scsi transparent cmd set */
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Subisd200 = 7, /* ISD200 ATA */
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Subdev = 0xff, /* use device's value */
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Umsreset = 0xFF,
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Getmaxlun = 0xFE,
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// Maxlun = 256,
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Maxlun = 32,
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CMreset = 1,
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Pcmd = 0,
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Pdata,
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Pstatus,
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CbwLen = 31,
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CbwDataIn = 0x80,
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CbwDataOut = 0x00,
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CswLen = 13,
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CswOk = 0,
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CswFailed = 1,
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CswPhaseErr = 2,
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};
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/*
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* corresponds to a lun.
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* these are ~600+Maxiosize bytes each; ScsiReq is not tiny.
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*/
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struct Umsc
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{
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ScsiReq;
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uint64_t blocks;
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int64_t capacity;
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/* from setup */
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char *bufp;
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long off; /* offset within a block */
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long nb; /* byte count */
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uint8_t rawcmd[16];
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uint8_t phase;
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char *inq;
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Ums *ums;
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Usbfs fs;
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char buf[Maxiosize];
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};
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struct Ums
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{
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QLock;
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Dev *dev;
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Dev *epin;
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Dev *epout;
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Umsc *lun;
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uint8_t maxlun;
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int seq;
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int nerrs;
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int wrongresidues;
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};
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/*
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* USB transparent SCSI devices
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*/
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struct Cbw
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{
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char signature[4]; /* "USBC" */
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long tag;
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long datalen;
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uint8_t flags;
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uint8_t lun;
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uint8_t len;
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char command[16];
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};
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struct Csw
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{
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char signature[4]; /* "USBS" */
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long tag;
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long dataresidue;
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uint8_t status;
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};
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int diskmain(Dev*, int, char**);
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