143 lines
3.1 KiB
C
143 lines
3.1 KiB
C
/* Copyright (c) 20XX 9front
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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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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typedef struct Part Part;
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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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Maxparts = 16,
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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 Part
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{
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int id;
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int inuse;
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int vers;
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uint32_t mode;
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char *name;
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int64_t offset; /* in lbsize units */
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int64_t length; /* in lbsize units */
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};
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struct Umsc
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{
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ScsiReq;
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char name[40];
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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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int32_t off; /* offset within a block */
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int32_t nb; /* byte count */
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QLock ql;
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/* partitions */
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Part part[Maxparts];
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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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char buf[Maxiosize];
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};
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struct Ums
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{
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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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int32_t tag;
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int32_t 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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int32_t tag;
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int32_t dataresidue;
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uint8_t status;
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};
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