/* * Copyright (c) 1993 Steve Gerakines * * This is freely redistributable software. You may do anything you * wish with it, so long as the above notice stays intact. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * * ft.c - QIC-40/80 floppy tape driver * $Id: ft.c,v 1.7 1994/08/02 07:39:22 davidg Exp $ * * * 01/26/94 v0.3b - Jim Babb * Got rid of the hard coded device selection. Moved (some of) the * static variables into a structure for support of multiple devices. * ( still has a way to go for 2 controllers - but closer ) * Changed the interface with fd.c so we no longer 'steal' it's * driver routine vectors. * * 10/30/93 v0.3 * Fixed a couple more bugs. Reading was sometimes looping when an * an error such as address-mark-missing was encountered. Both * reading and writing was having more backup-and-retries than was * necessary. Added support to get hardware info. Updated for use * with FreeBSD. * * 09/15/93 v0.2 pl01 * Fixed a bunch of bugs: extra isa_dmadone() in async_write() (shouldn't * matter), fixed double buffering in async_req(), changed tape_end() in * set_fdcmode() to reduce unexpected interrupts, changed end of track * processing in async_req(), protected more of ftreq_rw() with an * splbio(). Changed some of the ftreq_*() functions so that they wait * for inactivity and then go, instead of aborting immediately. * * 08/07/93 v0.2 release * Shifted from ftstrat to ioctl support for I/O. Streaming is now much * more reliable. Added internal support for error correction, QIC-40, * and variable length tapes. Random access of segments greatly * improved. Formatting and verification support is close but still * incomplete. * * 06/03/93 v0.1 Alpha release * Hopefully the last re-write. Many bugs fixed, many remain. * * $Id: ft.c,v 1.7 1994/08/02 07:39:22 davidg Exp $ */ #include "ft.h" #if NFT > 0 #include "fd.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* Enable or disable debugging messages. */ #define FTDBGALL 0 /* everything */ /* #define DPRT(a) printf a */ #define DPRT(a) /* Constants private to the driver */ #define FTPRI (PRIBIO) /* sleep priority */ /* The following items are needed from the fd driver. */ extern int in_fdc(int); /* read fdc registers */ extern int out_fdc(int, int); /* write fdc registers */ extern int hz; /* system clock rate */ /* Type of tape attached */ /* use numbers that don't interfere with the possible floppy types */ #define NO_TYPE 0 /* (same as NO_TYPE in fd.c) */ /* F_TAPE_TYPE must match value in fd.c */ #define F_TAPE_TYPE 0x020 /* bit for ft->types to indicate tape */ #define FT_MOUNTAIN (F_TAPE_TYPE | 1) #define FT_COLORADO (F_TAPE_TYPE | 2) /* Mode FDC is currently in: tape or disk */ enum { FDC_TAPE_MODE, FDC_DISK_MODE }; /* Command we are awaiting completion of */ enum { FTCMD_NONE, FTCMD_RESET, FTCMD_RECAL, FTCMD_SEEK, FTCMD_READID }; /* Tape interrupt status of current request */ enum { FTSTS_NONE, FTSTS_SNOOZE, FTSTS_INTERRUPT, FTSTS_TIMEOUT }; /* Tape I/O status */ enum { FTIO_READY, /* No I/O activity */ FTIO_READING, /* Currently reading blocks */ FTIO_RDAHEAD, /* Currently reading ahead */ FTIO_WRITING /* Buffers are being written */ }; /* Current tape mode */ enum { FTM_PRIMARY, /* Primary mode */ FTM_VERIFY, /* Verify mode */ FTM_FORMAT, /* Format mode */ FTM_DIAG1, /* Diagnostic mode 1 */ FTM_DIAG2 /* Diagnostic mode 2 */ }; /* Tape geometries table */ QIC_Geom ftgtbl[] = { { 0, 0, "Unformatted", "Unknown", 0, 0, 0, 0, 0 }, /* XXX */ { 1, 1, "QIC-40", "205/550", 20, 68, 2176, 128, 21760 }, { 1, 2, "QIC-40", "307.5/550", 20, 102, 3264, 128, 32640 }, { 1, 3, "QIC-40", "295/900", 0, 0, 0, 0, 0 }, /* ??? */ { 1, 4, "QIC-40", "1100/550", 20, 365, 11680, 128, 32512 }, { 1, 5, "QIC-40", "1100/900", 0, 0, 0, 0, 0 }, /* ??? */ { 2, 1, "QIC-80", "205/550", 28, 100, 3200, 128, 19200 }, { 2, 2, "QIC-80", "307.5/550", 28, 150, 4800, 128, 19200 }, { 2, 3, "QIC-80", "295/900", 0, 0, 0, 0, 0 }, /* ??? */ { 2, 4, "QIC-80", "1100/550", 28, 537, 17184, 128, 32512 }, { 2, 5, "QIC-80", "1100/900", 0, 0, 0, 0, 0 }, /* ??? */ { 3, 1, "QIC-500", "205/550", 0, 0, 0, 0, 0 }, /* ??? */ { 3, 2, "QIC-500", "307.5/550", 0, 0, 0, 0, 0 }, /* ??? */ { 3, 3, "QIC-500", "295/900", 0, 0, 0, 0, 0 }, /* ??? */ { 3, 4, "QIC-500", "1100/550", 0, 0, 0, 0, 0 }, /* ??? */ { 3, 5, "QIC-500", "1100/900", 0, 0, 0, 0, 0 } /* ??? */ }; #define NGEOM (sizeof(ftgtbl) / sizeof(QIC_Geom)) QIC_Geom *ftg = NULL; /* Current tape's geometry */ /* * things relating to asynchronous commands */ static int astk_depth; /* async_cmd stack depth */ static int awr_state; /* state of async write */ static int ard_state; /* state of async read */ static int arq_state; /* state of async request */ static int async_retries; /* retries, one per invocation */ static int async_func; /* function to perform */ static int async_state; /* state current function is at */ static int async_arg[5]; /* up to 5 arguments for async cmds */ static int async_ret; /* return value */ /* List of valid async (interrupt driven) tape support functions. */ enum { ACMD_NONE, /* no command */ ACMD_SEEK, /* command seek */ ACMD_STATUS, /* report status */ ACMD_STATE, /* wait for state bits to be true */ ACMD_SEEKSTS, /* perform command and wait for status */ ACMD_READID, /* read id */ ACMD_RUNBLK /* ready tape for I/O on the given block */ }; /* Call another asyncronous command from within async_cmd(). */ #define CALL_ACMD(r,f,a,b,c,d,e) \ astk[astk_depth].over_retries = async_retries; \ astk[astk_depth].over_func = async_func; \ astk[astk_depth].over_state = (r); \ for (i = 0; i < 5; i++) \ astk[astk_depth].over_arg[i] = async_arg[i]; \ async_func = (f); async_state = 0; async_retries = 0; \ async_arg[0]=(a); async_arg[1]=(b); async_arg[2]=(c); \ async_arg[3]=(d); async_arg[4]=(e); \ astk_depth++; \ goto restate /* Perform an asyncronous command from outside async_cmd(). */ #define ACMD_FUNC(r,f,a,b,c,d,e) over_async = (r); astk_depth = 0; \ async_func = (f); async_state = 0; async_retries = 0; \ async_arg[0]=(a); async_arg[1]=(b); async_arg[2]=(c); \ async_arg[3]=(d); async_arg[4]=(e); \ async_cmd(ftu); \ return /* Various wait channels */ static struct { int buff_avail; int iosts_change; int long_delay; int intr_wait; } ftsem; /***********************************************************************\ * Per controller structure. * \***********************************************************************/ extern struct fdc_data fdc_data[NFDC]; /***********************************************************************\ * Per tape drive structure. * \***********************************************************************/ struct ft_data { struct fdc_data *fdc; /* pointer to controller structure */ int ftsu; /* this units number on this controller */ int type; /* Drive type (Mountain, Colorado) */ /* QIC_Geom *ftg; */ /* pointer to Current tape's geometry */ int flags; int cmd_wait; /* Command we are awaiting completion of */ int sts_wait; /* Tape interrupt status of current request */ int io_sts; /* Tape I/O status */ int mode; int pcn; /* present cylinder number */ int attaching; /* true when ft is attaching */ unsigned char *xptr; /* pointer to buffer blk to xfer */ int xcnt; /* transfer count */ int xblk; /* block number to transfer */ SegReq *curseg; /* Current segment to do I/O on */ SegReq *bufseg; /* Buffered segment to r/w ahead */ /* the next 3 should be defines in 'flags' */ int active; /* TRUE if transfer is active */ int rdonly; /* TRUE if tape is read-only */ int newcart; /* TRUE if new cartridge detected */ int laststs; /* last reported status code */ int lastcfg; /* last reported QIC config */ int lasterr; /* last QIC error code */ int lastpos; /* last known segment number */ int moving; /* TRUE if tape is moving */ int rid[7]; /* read_id return values */ } ft_data[NFT]; /***********************************************************************\ * Throughout this file the following conventions will be used: * * ft is a pointer to the ft_data struct for the drive in question * * fdc is a pointer to the fdc_data struct for the controller * * ftu is the tape drive unit number * * fdcu is the floppy controller unit number * * ftsu is the tape drive unit number on that controller. (sub-unit) * \***********************************************************************/ typedef int ftu_t; typedef int ftsu_t; typedef struct ft_data *ft_p; #define id_physid id_scsiid /* this biotab field doubles as a field */ /* for the physical unit number on the controller */ int ftopen(dev_t, int); int ftclose(dev_t, int); void ftstrategy(struct buf *); int ftioctl(dev_t, int, caddr_t, int, struct proc *); int ftdump(dev_t); int ftsize(dev_t); static void ft_timeout(caddr_t arg1); void async_cmd(ftu_t); void async_req(ftu_t, int); void async_read(ftu_t, int); void async_write(ftu_t, int); void tape_start(ftu_t); void tape_end(ftu_t); void tape_inactive(ftu_t); /* * Probe/attach floppy tapes. */ int ftattach(isadev, fdup) struct isa_device *isadev, *fdup; { fdcu_t fdcu = isadev->id_unit; /* fdc active unit */ fdc_p fdc = fdc_data + fdcu; /* pointer to controller structure */ ftu_t ftu = fdup->id_unit; ft_p ft; ftsu_t ftsu = fdup->id_physid; if (ftu >= NFT) return 0; ft = &ft_data[ftu]; /* Probe for tape */ ft->attaching = 1; ft->type = NO_TYPE; ft->fdc = fdc; ft->ftsu = ftsu; tape_start(ftu); /* ready controller for tape */ tape_cmd(ftu, QC_COL_ENABLE1); tape_cmd(ftu, QC_COL_ENABLE2); if (tape_status(ftu) >= 0) { ft->type = FT_COLORADO; fdc->flags |= FDC_HASFTAPE; printf(" [%d: ft%d: Colorado tape]", fdup->id_physid, fdup->id_unit ); tape_cmd(ftu, QC_COL_DISABLE); goto out; } tape_start(ftu); /* ready controller for tape */ tape_cmd(ftu, QC_MTN_ENABLE1); tape_cmd(ftu, QC_MTN_ENABLE2); if (tape_status(ftu) >= 0) { ft->type = FT_MOUNTAIN; fdc->flags |= FDC_HASFTAPE; printf(" [%d: ft%d: Mountain tape]", fdup->id_physid, fdup->id_unit ); tape_cmd(ftu, QC_MTN_DISABLE); goto out; } out: tape_end(ftu); ft->attaching = 0; return(ft->type); } /* * Perform common commands asynchronously. */ void async_cmd(ftu_t ftu) { ft_p ft = &ft_data[ftu]; fdcu_t fdcu = ft->fdc->fdcu; int cmd, i, st0, st3, pcn; static int bitn, retval, retpos, nbits, newcn; static struct { int over_func; int over_state; int over_retries; int over_arg[5]; } astk[15]; static int wanttrk, wantblk, wantdir; static int curpos, curtrk, curblk, curdir, curdiff; static int errcnt = 0; restate: #if FTDBGALL DPRT(("async_cmd state: func: %d state: %d\n", async_func, async_state)); #endif switch(async_func) { case ACMD_SEEK: /* * Arguments: * 0 - command to perform */ switch (async_state) { case 0: cmd = async_arg[0]; #if FTDBGALL DPRT(("===>async_seek cmd = %d\n", cmd)); #endif newcn = (cmd <= ft->pcn) ? ft->pcn - cmd : ft->pcn + cmd; async_state = 1; i = 0; if (out_fdc(fdcu, NE7CMD_SEEK) < 0) i = 1; if (!i && out_fdc(fdcu, 0x00) < 0) i = 1; if (!i && out_fdc(fdcu, newcn) < 0) i = 1; if (i) { if (++async_retries >= 10) { DPRT(("ft%d: async_cmd command seek failed!!\n", ftu)); goto complete; } DPRT(("ft%d: async_cmd command seek retry...\n",ftu)); async_state = 0; goto restate; } break; case 1: out_fdc(fdcu, NE7CMD_SENSEI); st0 = in_fdc(fdcu); pcn = in_fdc(fdcu); if (st0 < 0 || pcn < 0 || newcn != pcn) { if (++async_retries >= 10) { DPRT(("ft%d: async_cmd seek retries exceeded\n",ftu)); goto complete; } DPRT(("ft%d: async_cmd command bad st0=$%02x pcn=$%02x\n", ftu, st0, pcn)); async_state = 0; timeout(ft_timeout, (caddr_t)ftu, hz/10); break; } if (st0 & 0x20) { /* seek done */ ft->pcn = pcn; } #if FTDBGALL else DPRT(("ft%d: async_seek error st0 = $%02x pcn = %d\n", ftu, st0, pcn)); #endif if (async_arg[1]) goto complete; async_state = 2; timeout(ft_timeout, (caddr_t)ftu, hz/50); break; case 2: goto complete; /* NOTREACHED */ } break; case ACMD_STATUS: /* * Arguments: * 0 - command to issue report from * 1 - number of bits * modifies: bitn, retval, st3 */ switch (async_state) { case 0: bitn = 0; retval = 0; cmd = async_arg[0]; nbits = async_arg[1]; DPRT(("async_status got cmd = %d nbits = %d\n", cmd,nbits)); CALL_ACMD(5, ACMD_SEEK, QC_NEXTBIT, 0, 0, 0, 0); /* NOTREACHED */ case 1: out_fdc(fdcu, NE7CMD_SENSED); out_fdc(fdcu, 0x00); st3 = in_fdc(fdcu); if (st3 < 0) { DPRT(("ft%d: async_status timed out on bit %d r=$%02x\n", ftu,bitn,retval)); async_ret = -1; goto complete; } if ((st3 & 0x10) != 0) retval |= (1 << bitn); bitn++; if (bitn >= (nbits+2)) { if ((retval & 1) && (retval & (1 << (nbits+1)))) { async_ret = (retval & ~(1<<(nbits+1))) >> 1; if (async_arg[0] == QC_STATUS && async_arg[2] == 0 && (async_ret & (QS_ERROR|QS_NEWCART))) { async_state = 2; goto restate; } DPRT(("async status got $%04x ($%04x)\n", async_ret,retval)); } else { DPRT(("ft%d: async_status failed: retval=$%04x nbits=%d\n", ftu, retval,nbits)); async_ret = -2; } goto complete; } CALL_ACMD(1, ACMD_SEEK, QC_NEXTBIT, 0, 0, 0, 0); /* NOTREACHED */ case 2: if (async_ret & QS_NEWCART) ft->newcart = 1; CALL_ACMD(3, ACMD_STATUS, QC_ERRCODE, 16, 1, 0, 0); case 3: ft->lasterr = async_ret; if ((ft->lasterr & QS_NEWCART) == 0 && ft->lasterr) { DPRT(("ft%d: QIC error %d occurred on cmd %d\n", ftu, ft->lasterr & 0xff, ft->lasterr >> 8)); } cmd = async_arg[0]; nbits = async_arg[1]; CALL_ACMD(4, ACMD_STATUS, QC_STATUS, 8, 1, 0, 0); case 4: goto complete; case 5: CALL_ACMD(6, ACMD_SEEK, QC_NEXTBIT, 0, 0, 0, 0); case 6: CALL_ACMD(7, ACMD_SEEK, QC_NEXTBIT, 0, 0, 0, 0); case 7: CALL_ACMD(8, ACMD_SEEK, QC_NEXTBIT, 0, 0, 0, 0); case 8: cmd = async_arg[0]; CALL_ACMD(1, ACMD_SEEK, cmd, 0, 0, 0, 0); } break; case ACMD_STATE: /* * Arguments: * 0 - status bits to check */ switch(async_state) { case 0: CALL_ACMD(1, ACMD_STATUS, QC_STATUS, 8, 0, 0, 0); case 1: if ((async_ret & async_arg[0]) != 0) goto complete; async_state = 0; if (++async_retries == 360) { /* 90 secs. */ DPRT(("ft%d: acmd_state exceeded retry count\n", ftu)); goto complete; } timeout(ft_timeout, (caddr_t)ftu, hz/4); break; } break; case ACMD_SEEKSTS: /* * Arguments: * 0 - command to perform * 1 - status bits to check * 2 - (optional) seconds to wait until completion */ switch(async_state) { case 0: cmd = async_arg[0]; async_retries = (async_arg[2]) ? (async_arg[2]*4) : 10; CALL_ACMD(1, ACMD_SEEK, cmd, 0, 0, 0, 0); case 1: CALL_ACMD(2, ACMD_STATUS, QC_STATUS, 8, 0, 0, 0); case 2: if ((async_ret & async_arg[1]) != 0) goto complete; if (--async_retries == 0) { DPRT(("ft%d: acmd_seeksts retries exceeded\n", ftu)); goto complete; } async_state = 1; timeout(ft_timeout, (caddr_t)ftu, hz/4); break; } break; case ACMD_READID: /* * Arguments: (none) */ switch(async_state) { case 0: if (!ft->moving) { CALL_ACMD(4, ACMD_SEEKSTS, QC_STOP, QS_READY, 0, 0, 0); /* NOTREACHED */ } async_state = 1; out_fdc(fdcu, 0x4a); /* READ_ID */ out_fdc(fdcu, 0); break; case 1: for (i = 0; i < 7; i++) ft->rid[i] = in_fdc(fdcu); async_ret = (ft->rid[3]*ftg->g_fdtrk) + (ft->rid[4]*ftg->g_fdside) + ft->rid[5] - 1; DPRT(("readid st0:%02x st1:%02x st2:%02x c:%d h:%d s:%d pos:%d\n", ft->rid[0], ft->rid[1], ft->rid[2], ft->rid[3], ft->rid[4], ft->rid[5], async_ret)); if ((ft->rid[0] & 0xc0) == 0x40) { if (++errcnt >= 10) { DPRT(("ft%d: acmd_readid errcnt exceeded\n", fdcu)); async_ret = ft->lastpos; errcnt = 0; goto complete; } if (errcnt > 2) { ft->moving = 0; CALL_ACMD(4, ACMD_SEEKSTS, QC_STOP, QS_READY, 0, 0, 0); } DPRT(("readid retry...\n")); async_state = 0; goto restate; } if ((async_ret % ftg->g_blktrk) == (ftg->g_blktrk-1)) { DPRT(("acmd_readid detected last block on track\n")); retpos = async_ret; CALL_ACMD(2, ACMD_STATE, QS_BOT|QS_EOT, 0, 0, 0, 0); /* NOTREACHED */ } ft->lastpos = async_ret; errcnt = 0; goto complete; /* NOTREACHED */ case 2: CALL_ACMD(3, ACMD_STATE, QS_READY, 0, 0, 0, 0); case 3: ft->moving = 0; async_ret = retpos+1; goto complete; case 4: CALL_ACMD(5, ACMD_SEEK, QC_FORWARD, 0, 0, 0, 0); case 5: ft->moving = 1; async_state = 0; timeout(ft_timeout, (caddr_t)ftu, hz/10); /* XXX */ break; } break; case ACMD_RUNBLK: /* * Arguments: * 0 - block number I/O will be performed on * * modifies: curpos */ switch (async_state) { case 0: wanttrk = async_arg[0] / ftg->g_blktrk; wantblk = async_arg[0] % ftg->g_blktrk; wantdir = wanttrk & 1; ft->moving = 0; CALL_ACMD(1, ACMD_SEEKSTS, QC_STOP, QS_READY, 0, 0, 0); case 1: curtrk = wanttrk; curdir = curtrk & 1; DPRT(("Changing to track %d\n", wanttrk)); CALL_ACMD(2, ACMD_SEEK, QC_SEEKTRACK, 0, 0, 0, 0); case 2: cmd = wanttrk+2; CALL_ACMD(3, ACMD_SEEKSTS, cmd, QS_READY, 0, 0, 0); case 3: CALL_ACMD(4, ACMD_STATUS, QC_STATUS, 8, 0, 0, 0); case 4: ft->laststs = async_ret; if (wantblk == 0) { curblk = 0; cmd = (wantdir) ? QC_SEEKEND : QC_SEEKSTART; CALL_ACMD(6, ACMD_SEEKSTS, cmd, QS_READY, 90, 0, 0); } if (ft->laststs & QS_BOT) { DPRT(("Tape is at BOT\n")); curblk = (wantdir) ? 4800 : 0; async_state = 6; goto restate; } if (ft->laststs & QS_EOT) { DPRT(("Tape is at EOT\n")); curblk = (wantdir) ? 0 : 4800; async_state = 6; goto restate; } CALL_ACMD(5, ACMD_READID, 0, 0, 0, 0, 0); case 5: curtrk = (async_ret+1) / ftg->g_blktrk; curblk = (async_ret+1) % ftg->g_blktrk; DPRT(("gotid: curtrk=%d wanttrk=%d curblk=%d wantblk=%d\n", curtrk, wanttrk, curblk, wantblk)); if (curtrk != wanttrk) { /* oops! */ DPRT(("oops!! wrong track!\n")); CALL_ACMD(1, ACMD_SEEKSTS, QC_STOP, QS_READY, 0, 0, 0); } async_state = 6; goto restate; case 6: DPRT(("curtrk = %d nextblk = %d\n", curtrk, curblk)); if (curblk == wantblk) { ft->lastpos = curblk - 1; async_ret = ft->lastpos; if (ft->moving) goto complete; CALL_ACMD(7, ACMD_STATE, QS_READY, 0, 0, 0, 0); } if (curblk > wantblk) { /* passed it */ ft->moving = 0; CALL_ACMD(10, ACMD_SEEKSTS, QC_STOP, QS_READY, 0, 0, 0); } if ((wantblk - curblk) <= 96) { /* approaching it */ CALL_ACMD(5, ACMD_READID, 0, 0, 0, 0, 0); } /* way up ahead */ ft->moving = 0; CALL_ACMD(14, ACMD_SEEKSTS, QC_STOP, QS_READY, 0, 0, 0); break; case 7: ft->moving = 1; CALL_ACMD(8, ACMD_SEEK, QC_FORWARD, 0, 0, 0, 0); break; case 8: async_state = 9; timeout(ft_timeout, (caddr_t)ftu, hz/10); /* XXX */ break; case 9: goto complete; case 10: curdiff = ((curblk - wantblk) / QCV_BLKSEG) + 2; if (curdiff >= ftg->g_segtrk) curdiff = ftg->g_segtrk - 1; DPRT(("pos %d past %d, reverse %d\n", curblk, wantblk, curdiff)); CALL_ACMD(11, ACMD_SEEK, QC_SEEKREV, 0, 0, 0, 0); case 11: DPRT(("reverse 1 done\n")); CALL_ACMD(12, ACMD_SEEK, (curdiff & 0xf)+2, 0, 0, 0, 0); case 12: DPRT(("reverse 2 done\n")); CALL_ACMD(13, ACMD_SEEKSTS, ((curdiff>>4)&0xf)+2, QS_READY, 90, 0, 0); case 13: CALL_ACMD(5, ACMD_READID, 0, 0, 0, 0, 0); case 14: curdiff = ((wantblk - curblk) / QCV_BLKSEG) - 2; if (curdiff < 0) curdiff = 0; DPRT(("pos %d before %d, forward %d\n", curblk, wantblk, curdiff)); CALL_ACMD(15, ACMD_SEEK, QC_SEEKFWD, 0, 0, 0, 0); case 15: DPRT(("forward 1 done\n")); CALL_ACMD(16, ACMD_SEEK, (curdiff & 0xf)+2, 0, 0, 0, 0); case 16: DPRT(("forward 2 done\n")); CALL_ACMD(13, ACMD_SEEKSTS, ((curdiff>>4)&0xf)+2, QS_READY, 90, 0, 0); } break; } return; complete: if (astk_depth) { astk_depth--; async_retries = astk[astk_depth].over_retries; async_func = astk[astk_depth].over_func; async_state = astk[astk_depth].over_state; for(i = 0; i < 5; i++) async_arg[i] = astk[astk_depth].over_arg[i]; goto restate; } async_func = ACMD_NONE; async_state = 0; switch (ft->io_sts) { case FTIO_READY: async_req(ftu, 2); break; case FTIO_READING: async_read(ftu, 2); break; case FTIO_WRITING: async_write(ftu, 2); break; default: DPRT(("ft%d: bad async_cmd ending I/O state!\n", ftu)); break; } } /* * Entry point for the async request processor. */ void async_req(ftu_t ftu, int from) { ft_p ft = &ft_data[ftu]; SegReq *sp; static int over_async, lastreq, domore; int cmd; if (from == 2) arq_state = over_async; restate: switch (arq_state) { case 0: /* Process segment */ ft->io_sts = ft->curseg->reqtype; if (ft->io_sts == FTIO_WRITING) async_write(ftu, from); else async_read(ftu, from); if (ft->io_sts != FTIO_READY) return; /* Swap buffered and current segment */ lastreq = ft->curseg->reqtype; ft->curseg->reqtype = FTIO_READY; sp = ft->curseg; ft->curseg = ft->bufseg; ft->bufseg = sp; wakeup((caddr_t)&ftsem.buff_avail); /* Detect end of track */ if (((ft->xblk / QCV_BLKSEG) % ftg->g_segtrk) == 0) { domore = (ft->curseg->reqtype != FTIO_READY); ACMD_FUNC(2, ACMD_STATE, QS_BOT|QS_EOT, 0, 0, 0, 0); } arq_state = 1; goto restate; case 1: /* Next request */ if (ft->curseg->reqtype != FTIO_READY) { ft->curseg->reqcrc = 0; arq_state = ard_state = awr_state = 0; ft->xblk = ft->curseg->reqblk; ft->xcnt = 0; ft->xptr = ft->curseg->buff; DPRT(("I/O reqblk = %d\n", ft->curseg->reqblk)); goto restate; } if (lastreq == FTIO_READING) { ft->curseg->reqtype = FTIO_RDAHEAD; ft->curseg->reqblk = ft->xblk; ft->curseg->reqcrc = 0; ft->curseg->reqcan = 0; bzero(ft->curseg->buff, QCV_SEGSIZE); arq_state = ard_state = awr_state = 0; ft->xblk = ft->curseg->reqblk; ft->xcnt = 0; ft->xptr = ft->curseg->buff; DPRT(("Processing readahead reqblk = %d\n", ft->curseg->reqblk)); goto restate; } if (ft->moving) { DPRT(("No more I/O.. Stopping.\n")); ACMD_FUNC(7, ACMD_SEEKSTS, QC_STOP, QS_READY, 0, 0, 0); break; } arq_state = 7; goto restate; case 2: /* End of track */ ft->moving = 0; ACMD_FUNC(3, ACMD_STATE, QS_READY, 0, 0, 0, 0); break; case 3: DPRT(("async_req seek head to track %d\n", ft->xblk / ftg->g_blktrk)); ACMD_FUNC(4, ACMD_SEEK, QC_SEEKTRACK, 0, 0, 0, 0); break; case 4: cmd = (ft->xblk / ftg->g_blktrk) + 2; if (domore) { ACMD_FUNC(5, ACMD_SEEKSTS, cmd, QS_READY, 0, 0, 0); } else { ACMD_FUNC(7, ACMD_SEEKSTS, cmd, QS_READY, 0, 0, 0); } break; case 5: ft->moving = 1; ACMD_FUNC(6, ACMD_SEEK, QC_FORWARD, 0, 0, 0, 0); break; case 6: arq_state = 1; timeout(ft_timeout, (caddr_t)ftu, hz/10); /* XXX */ break; case 7: ft->moving = 0; /* Check one last time to see if a request came in. */ if (ft->curseg->reqtype != FTIO_READY) { DPRT(("async_req: Never say no!\n")); arq_state = 1; goto restate; } /* Time to rest. */ ft->active = 0; wakeup((caddr_t)&ftsem.iosts_change); /* wakeup those who want an i/o chg */ break; } } /* * Entry for async read. */ void async_read(ftu_t ftu, int from) { ft_p ft = &ft_data[ftu]; fdcu_t fdcu = ft->fdc->fdcu; /* fdc active unit */ unsigned long paddr; int i, cmd, newcn, rddta[7]; int st0, pcn, where; static int over_async; if (from == 2) ard_state = over_async; restate: #if FTDBGALL DPRT(("async_read: state: %d from = %d\n", ard_state, from)); #endif switch (ard_state) { case 0: /* Start off */ /* If tape is not at desired position, stop and locate */ if (ft->lastpos != (ft->xblk-1)) { DPRT(("ft%d: position unknown: lastpos:%d ft->xblk:%d\n", ftu, ft->lastpos, ft->xblk)); ACMD_FUNC(1, ACMD_RUNBLK, ft->xblk, 0, 0, 0, 0); } /* Tape is in position but stopped. */ if (!ft->moving) { DPRT(("async_read ******STARTING TAPE\n")); ACMD_FUNC(3, ACMD_STATE, QS_READY, 0, 0, 0, 0); } ard_state = 1; goto restate; case 1: /* Start DMA */ /* Tape is now moving and in position-- start DMA now! */ isa_dmastart(B_READ, ft->xptr, QCV_BLKSIZE, 2); out_fdc(fdcu, 0x66); /* read */ out_fdc(fdcu, 0x00); /* unit */ out_fdc(fdcu, (ft->xblk % ftg->g_fdside) / ftg->g_fdtrk); /* cylinder */ out_fdc(fdcu, ft->xblk / ftg->g_fdside); /* head */ out_fdc(fdcu, (ft->xblk % ftg->g_fdtrk) + 1); /* sector */ out_fdc(fdcu, 0x03); /* 1K sectors */ out_fdc(fdcu, (ft->xblk % ftg->g_fdtrk) + 1); /* count */ out_fdc(fdcu, 0x74); /* gap length */ out_fdc(fdcu, 0xff); /* transfer size */ ard_state = 2; break; case 2: /* DMA completed */ /* Transfer complete, get status */ for (i = 0; i < 7; i++) rddta[i] = in_fdc(fdcu); isa_dmadone(B_READ, ft->xptr, QCV_BLKSIZE, 2); #if FTDBGALL /* Compute where the controller thinks we are */ where = (rddta[3]*ftg->g_fdtrk) + (rddta[4]*ftg->g_fdside) + rddta[5]-1; DPRT(("xfer done: st0:%02x st1:%02x st2:%02x c:%d h:%d s:%d pos:%d want:%d\n", rddta[0], rddta[1], rddta[2], rddta[3], rddta[4], rddta[5], where, ft->xblk)); #endif /* Check for errors */ if ((rddta[0] & 0xc0) != 0x00) { if (rddta[1] & 0x04) { /* Probably wrong position */ ft->lastpos = ft->xblk; ard_state = 0; goto restate; } else { /* CRC/Address-mark/Data-mark, et. al. */ DPRT(("ft%d: CRC error on block %d\n", fdcu, ft->xblk)); ft->curseg->reqcrc |= (1 << ft->xcnt); } } /* Otherwise, transfer completed okay. */ ft->lastpos = ft->xblk; ft->xblk++; ft->xcnt++; ft->xptr += QCV_BLKSIZE; if (ft->xcnt < QCV_BLKSEG && ft->curseg->reqcan == 0) { ard_state = 0; goto restate; } DPRT(("Read done.. Cancel = %d\n", ft->curseg->reqcan)); ft->io_sts = FTIO_READY; break; case 3: ft->moving = 1; ACMD_FUNC(4, ACMD_SEEK, QC_FORWARD, 0, 0, 0, 0); break; case 4: ard_state = 1; timeout(ft_timeout, (caddr_t)ftu, hz/10); /* XXX */ break; default: DPRT(("ft%d: bad async_read state %d!!\n", ftu, ard_state)); break; } } /* * Entry for async write. If from is 0, this came from the interrupt * routine, if it's 1 then it was a timeout, if it's 2, then an * async_cmd completed. */ void async_write(ftu_t ftu, int from) { ft_p ft = &ft_data[ftu]; fdcu_t fdcu = ft->fdc->fdcu; /* fdc active unit */ unsigned long paddr; int i, cmd, newcn, rddta[7]; int st0, pcn, where; static int over_async; static int retries = 0; if (from == 2) awr_state = over_async; restate: #if FTDBGALL DPRT(("async_write: state: %d from = %d\n", awr_state, from)); #endif switch (awr_state) { case 0: /* Start off */ /* If tape is not at desired position, stop and locate */ if (ft->lastpos != (ft->xblk-1)) { DPRT(("ft%d: position unknown: lastpos:%d ft->xblk:%d\n", ftu, ft->lastpos, ft->xblk)); ACMD_FUNC(1, ACMD_RUNBLK, ft->xblk, 0, 0, 0, 0); } /* Tape is in position but stopped. */ if (!ft->moving) { DPRT(("async_write ******STARTING TAPE\n")); ACMD_FUNC(3, ACMD_STATE, QS_READY, 0, 0, 0, 0); } awr_state = 1; goto restate; case 1: /* Start DMA */ /* Tape is now moving and in position-- start DMA now! */ isa_dmastart(B_WRITE, ft->xptr, QCV_BLKSIZE, 2); out_fdc(fdcu, 0x45); /* write */ out_fdc(fdcu, 0x00); /* unit */ out_fdc(fdcu, (ft->xblk % ftg->g_fdside) / ftg->g_fdtrk); /* cylinder */ out_fdc(fdcu, ft->xblk / ftg->g_fdside); /* head */ out_fdc(fdcu, (ft->xblk % ftg->g_fdtrk) + 1); /* sector */ out_fdc(fdcu, 0x03); /* 1K sectors */ out_fdc(fdcu, (ft->xblk % ftg->g_fdtrk) + 1); /* count */ out_fdc(fdcu, 0x74); /* gap length */ out_fdc(fdcu, 0xff); /* transfer size */ awr_state = 2; break; case 2: /* DMA completed */ /* Transfer complete, get status */ for (i = 0; i < 7; i++) rddta[i] = in_fdc(fdcu); isa_dmadone(B_WRITE, ft->xptr, QCV_BLKSIZE, 2); #if FTDBGALL /* Compute where the controller thinks we are */ where = (rddta[3]*ftg->g_fdtrk) + (rddta[4]*ftg->g_fdside) + rddta[5]-1; DPRT(("xfer done: st0:%02x st1:%02x st2:%02x c:%d h:%d s:%d pos:%d want:%d\n", rddta[0], rddta[1], rddta[2], rddta[3], rddta[4], rddta[5], where, ft->xblk)); #endif /* Check for errors */ if ((rddta[0] & 0xc0) != 0x00) { if (rddta[1] & 0x04) { /* Probably wrong position */ ft->lastpos = ft->xblk; awr_state = 0; goto restate; } else if (retries < 5) { /* Something happened -- try again */ ft->lastpos = ft->xblk; awr_state = 0; retries++; goto restate; } else { /* * Retries failed. Note the unrecoverable error. * Marking the block as bad is fairly useless. */ printf("ft%d: unrecoverable write error on block %d\n", ftu, ft->xblk); ft->curseg->reqcrc |= (1 << ft->xcnt); } } /* Otherwise, transfer completed okay. */ retries = 0; ft->lastpos = ft->xblk; ft->xblk++; ft->xcnt++; ft->xptr += QCV_BLKSIZE; if (ft->xcnt < QCV_BLKSEG) { awr_state = 0; /* next block */ goto restate; } #if FTDBGALL DPRT(("Write done.\n")); #endif ft->io_sts = FTIO_READY; break; case 3: ft->moving = 1; ACMD_FUNC(4, ACMD_SEEK, QC_FORWARD, 0, 0, 0, 0); break; case 4: awr_state = 1; timeout(ft_timeout, (caddr_t)ftu, hz/10); /* XXX */ break; default: DPRT(("ft%d: bad async_write state %d!!\n", ftu, awr_state)); break; } } /* * Interrupt handler for active tape. Bounced off of fdintr(). */ int ftintr(ftu_t ftu) { int st0, pcn, i; ft_p ft = &ft_data[ftu]; fdcu_t fdcu = ft->fdc->fdcu; /* fdc active unit */ st0 = 0; pcn = 0; /* I/O segment transfer completed */ if (ft->active) { if (async_func != ACMD_NONE) { async_cmd(ftu); return(1); } #if FTDBGALL DPRT(("Got request interrupt\n")); #endif async_req(ftu, 0); return(1); } /* Get interrupt status */ if (ft->cmd_wait != FTCMD_READID) { out_fdc(fdcu, NE7CMD_SENSEI); st0 = in_fdc(fdcu); pcn = in_fdc(fdcu); } if (ft->cmd_wait == FTCMD_NONE || ft->sts_wait != FTSTS_SNOOZE) { huh_what: printf("ft%d: unexpected interrupt; st0 = $%02x pcn = %d\n", ftu, st0, pcn); return(1); } switch (ft->cmd_wait) { case FTCMD_RESET: ft->sts_wait = FTSTS_INTERRUPT; wakeup((caddr_t)&ftsem.intr_wait); break; case FTCMD_RECAL: case FTCMD_SEEK: if (st0 & 0x20) { /* seek done */ ft->sts_wait = FTSTS_INTERRUPT; ft->pcn = pcn; wakeup((caddr_t)&ftsem.intr_wait); } #if FTDBGALL else DPRT(("ft%d: seek error st0 = $%02x pcn = %d\n", ftu, st0, pcn)); #endif break; case FTCMD_READID: for (i = 0; i < 7; i++) ft->rid[i] = in_fdc(fdcu); ft->sts_wait = FTSTS_INTERRUPT; wakeup((caddr_t)&ftsem.intr_wait); break; default: goto huh_what; } return(1); } /* * Interrupt timeout routine. */ static void ft_timeout(caddr_t arg1) { int s; ftu_t ftu = (ftu_t)arg1; ft_p ft = &ft_data[ftu]; s = splbio(); if (ft->active) { if (async_func != ACMD_NONE) { async_cmd(ftu); splx(s); return; } async_req(ftu, 1); } else { ft->sts_wait = FTSTS_TIMEOUT; wakeup((caddr_t)&ftsem.intr_wait); } splx(s); } /* * Wait for a particular interrupt to occur. ftintr() will wake us up * if it sees what we want. Otherwise, time out and return error. * Should always disable ints before trigger is sent and calling here. */ int ftintr_wait(ftu_t ftu, int cmd, int ticks) { int retries, st0, pcn; ft_p ft = &ft_data[ftu]; fdcu_t fdcu = ft->fdc->fdcu; /* fdc active unit */ ft->cmd_wait = cmd; ft->sts_wait = FTSTS_SNOOZE; /* At attach time, we can't rely on having interrupts serviced */ if (ft->attaching) { switch (cmd) { case FTCMD_RESET: DELAY(100); ft->sts_wait = FTSTS_INTERRUPT; goto intrdone; case FTCMD_RECAL: case FTCMD_SEEK: for (retries = 0; retries < 10000; retries++) { out_fdc(fdcu, NE7CMD_SENSEI); st0 = in_fdc(fdcu); pcn = in_fdc(fdcu); if (st0 & 0x20) { ft->sts_wait = FTSTS_INTERRUPT; ft->pcn = pcn; goto intrdone; } DELAY(100); } break; } ft->sts_wait = FTSTS_TIMEOUT; goto intrdone; } if (ticks) timeout(ft_timeout, (caddr_t)ftu, ticks); tsleep((caddr_t)&ftsem.intr_wait, FTPRI, "ftwait", 0); intrdone: if (ft->sts_wait == FTSTS_TIMEOUT) { /* timeout */ if (ft->cmd_wait != FTCMD_RESET) DPRT(("ft%d: timeout on command %d\n", ftu, ft->cmd_wait)); ft->cmd_wait = FTCMD_NONE; ft->sts_wait = FTSTS_NONE; return(1); } /* got interrupt */ if (ft->attaching == 0 && ticks) untimeout(ft_timeout, (caddr_t)ftu); ft->cmd_wait = FTCMD_NONE; ft->sts_wait = FTSTS_NONE; return(0); } /* * Recalibrate tape drive. Parameter totape is true, if we should * recalibrate to tape drive settings. */ int tape_recal(ftu_t ftu, int totape) { int s; ft_p ft = &ft_data[ftu]; fdcu_t fdcu = ft->fdc->fdcu; /* fdc active unit */ DPRT(("tape_recal start\n")); out_fdc(fdcu, NE7CMD_SPECIFY); out_fdc(fdcu, (totape) ? 0xAD : 0xDF); out_fdc(fdcu, 0x02); s = splbio(); out_fdc(fdcu, NE7CMD_RECAL); out_fdc(fdcu, 0x00); if (ftintr_wait(ftu, FTCMD_RECAL, hz)) { splx(s); DPRT(("ft%d: recalibrate timeout\n", ftu)); return(1); } splx(s); out_fdc(fdcu, NE7CMD_SPECIFY); out_fdc(fdcu, (totape) ? 0xFD : 0xDF); out_fdc(fdcu, 0x02); DPRT(("tape_recal end\n")); return(0); } static void state_timeout(caddr_t arg1, int arg2) { ftu_t ftu = (ftu_t)arg1; wakeup((caddr_t)&ftsem.long_delay); } /* * Wait for a particular tape status to be met. If all is TRUE, then * all states must be met, otherwise any state can be met. */ int tape_state(ftu_t ftu, int all, int mask, int seconds) { int r, tries, maxtries; maxtries = (seconds) ? (4 * seconds) : 1; for (tries = 0; tries < maxtries; tries++) { r = tape_status(ftu); if (r >= 0) { if (all && (r & mask) == mask) return(r); if ((r & mask) != 0) return(r); } if (seconds) { timeout(state_timeout, (caddr_t)ftu, hz/4); tsleep((caddr_t)&ftsem.long_delay, FTPRI, "ftstate", 0); } } DPRT(("ft%d: tape_state failed on mask=$%02x maxtries=%d\n", ftu, mask, maxtries)); return(-1); } /* * Send a QIC command to tape drive, wait for completion. */ int tape_cmd(ftu_t ftu, int cmd) { int newcn; int retries = 0; int s; ft_p ft = &ft_data[ftu]; fdcu_t fdcu = ft->fdc->fdcu; /* fdc active unit */ DPRT(("===> tape_cmd: %d\n",cmd)); newcn = (cmd <= ft->pcn) ? ft->pcn - cmd : ft->pcn + cmd; retry: /* Perform seek */ s = splbio(); out_fdc(fdcu, NE7CMD_SEEK); out_fdc(fdcu, 0x00); out_fdc(fdcu, newcn); if (ftintr_wait(ftu, FTCMD_SEEK, hz)) { DPRT(("ft%d: tape_cmd seek timeout\n", ftu)); redo: splx(s); if (++retries < 5) goto retry; DPRT(("ft%d: tape_cmd seek failed!\n", ftu)); return(1); } splx(s); if (ft->pcn != newcn) { DPRT(("ft%d: bad seek in tape_cmd; pcn = %d newcn = %d\n", ftu, ft->pcn, newcn)); goto redo; } DELAY(2500); return(0); } /* * Return status of tape drive */ int tape_status(ftu_t ftu) { int r, err, tries; ft_p ft = &ft_data[ftu]; for (r = -1, tries = 0; r < 0 && tries < 3; tries++) r = qic_status(ftu, QC_STATUS, 8); if (tries == 3) return(-1); DPRT(("tape_status got $%04x\n",r)); ft->laststs = r; if (r & (QS_ERROR|QS_NEWCART)) { if (r & QS_NEWCART) ft->newcart = 1; err = qic_status(ftu, QC_ERRCODE, 16); ft->lasterr = err; if ((r & QS_NEWCART) == 0 && err && ft->attaching == 0) { DPRT(("ft%d: QIC error %d occurred on cmd %d\n", ftu, err & 0xff, err >> 8)); } r = qic_status(ftu, QC_STATUS, 8); ft->laststs = r; DPRT(("tape_status got error code $%04x new sts = $%02x\n",err,r)); } ft->rdonly = (r & QS_RDONLY); return(r); } /* * Transfer control to tape drive. */ void tape_start(ftu_t ftu) { ft_p ft = &ft_data[ftu]; fdc_p fdc = ft->fdc; int s; DPRT(("tape_start start\n")); s = splbio(); /* reset, dma disable */ outb(fdc->baseport+fdout, 0x00); (void)ftintr_wait(ftu, FTCMD_RESET, hz/10); /* raise reset, enable DMA */ outb(fdc->baseport+fdout, FDO_FRST | FDO_FDMAEN); (void)ftintr_wait(ftu, FTCMD_RESET, hz/10); splx(s); tape_recal(ftu, 1); /* set transfer speed */ outb(fdc->baseport+fdctl, FDC_500KBPS); DELAY(10); DPRT(("tape_start end\n")); } /* * Transfer control back to floppy disks. */ void tape_end(ftu_t ftu) { ft_p ft = &ft_data[ftu]; fdc_p fdc = ft->fdc; int s; DPRT(("tape_end start\n")); tape_recal(ftu, 0); s = splbio(); /* reset, dma disable */ outb(fdc->baseport+fdout, 0x00); (void)ftintr_wait(ftu, FTCMD_RESET, hz/10); /* raise reset, enable DMA */ outb(fdc->baseport+fdout, FDO_FRST | FDO_FDMAEN); (void)ftintr_wait(ftu, FTCMD_RESET, hz/10); splx(s); /* set transfer speed */ outb(fdc->baseport+fdctl, FDC_500KBPS); DELAY(10); fdc->flags &= ~FDC_TAPE_BUSY; DPRT(("tape_end end\n")); } /* * Wait for the driver to go inactive, cancel readahead if necessary. */ void tape_inactive(ftu_t ftu) { ft_p ft = &ft_data[ftu]; if (ft->curseg->reqtype == FTIO_RDAHEAD) { ft->curseg->reqcan = 1; /* XXX cancel rdahead */ while (ft->active) tsleep((caddr_t)&ftsem.iosts_change, FTPRI, "ftinact", 0); } while (ft->active) tsleep((caddr_t)&ftsem.iosts_change, FTPRI, "ftinact", 0); } /* * Get the geometry of the tape currently in the drive. */ int ftgetgeom(ftu_t ftu) { int r, i, tries; int cfg, qic80, ext; int sts, fmt, len; ft_p ft = &ft_data[ftu]; r = tape_status(ftu); /* XXX fix me when format mode is finished */ if ((r & QS_CART) == 0 || (r & QS_FMTOK) == 0) { DPRT(("ftgetgeom: no cart or not formatted 0x%04x\n",r)); ftg = NULL; ft->newcart = 1; return(0); } /* Report drive configuration */ for (cfg = -1, tries = 0; cfg < 0 && tries < 3; tries++) cfg = qic_status(ftu, QC_CONFIG, 8); if (tries == 3) { DPRT(("ftgetgeom report config failed\n")); ftg = NULL; return(-1); } DPRT(("ftgetgeom report config got $%04x\n", cfg)); ft->lastcfg = cfg; qic80 = cfg & QCF_QIC80; ext = cfg & QCF_EXTRA; /* * XXX - This doesn't seem to work on my Colorado Jumbo 250... * if it works on your drive, I'd sure like to hear about it. */ #if 0 /* Report drive status */ for (sts = -1, tries = 0; sts < 0 && tries < 3; tries++) sts = qic_status(ftu, QC_TSTATUS, 8); if (tries == 3) { DPRT(("ftgetgeom report tape status failed\n")); ftg = NULL; return(-1); } DPRT(("ftgetgeom report tape status got $%04x\n", sts)); #else /* * XXX - Forge a fake tape status based upon the returned * configuration, since the above command or code is broken * for my drive and probably other older drives. */ sts = 0; sts = (qic80) ? QTS_QIC80 : QTS_QIC40; sts |= (ext) ? QTS_LEN2 : QTS_LEN1; #endif fmt = sts & QTS_FMMASK; len = (sts & QTS_LNMASK) >> 4; if (fmt > QCV_NFMT) { ftg = NULL; printf("ft%d: unsupported tape format\n", ftu); return(-1); } if (len > QCV_NLEN) { ftg = NULL; printf("ft%d: unsupported tape length\n", ftu); return(-1); } /* Look up geometry in the table */ for (i = 1; i < NGEOM; i++) if (ftgtbl[i].g_fmtno == fmt && ftgtbl[i].g_lenno == len) break; if (i == NGEOM) { printf("ft%d: unknown tape geometry\n", ftu); ftg = NULL; return(-1); } ftg = &ftgtbl[i]; if (!ftg->g_trktape) { printf("ft%d: unsupported format %s w/len %s\n", ftu, ftg->g_fmtdesc, ftg->g_lendesc); ftg = NULL; return(-1); } DPRT(("Tape format is %s, length is %s\n", ftg->g_fmtdesc, ftg->g_lendesc)); ft->newcart = 0; return(0); } /* * Switch between tape/floppy. This will send the tape enable/disable * codes for this drive's manufacturer. */ int set_fdcmode(dev_t dev, int newmode) { ftu_t ftu = FDUNIT(minor(dev)); ft_p ft = &ft_data[ftu]; fdc_p fdc = ft->fdc; static int havebufs = 0; void *buf; int r, s, i; SegReq *sp; if (newmode == FDC_TAPE_MODE) { /* Wake up the tape drive */ switch (ft->type) { case NO_TYPE: fdc->flags &= ~FDC_TAPE_BUSY; return(ENXIO); case FT_COLORADO: tape_start(ftu); if (tape_cmd(ftu, QC_COL_ENABLE1)) { tape_end(ftu); return(EIO); } if (tape_cmd(ftu, QC_COL_ENABLE2)) { tape_end(ftu); return(EIO); } break; case FT_MOUNTAIN: tape_start(ftu); if (tape_cmd(ftu, QC_MTN_ENABLE1)) { tape_end(ftu); return(EIO); } if (tape_cmd(ftu, QC_MTN_ENABLE2)) { tape_end(ftu); return(EIO); } break; default: DPRT(("ft%d: bad tape type\n", ftu)); return(ENXIO); } if (tape_status(ftu) < 0) { tape_cmd(ftu, (ft->type == FT_COLORADO) ? QC_COL_DISABLE : QC_MTN_DISABLE); tape_end(ftu); return(EIO); } /* Grab buffers from memory. */ if (!havebufs) { ft->curseg = malloc(sizeof(SegReq), M_DEVBUF, M_NOWAIT); if (ft->curseg == NULL) { printf("ft%d: not enough memory for buffers\n", ftu); return(ENOMEM); } ft->bufseg = malloc(sizeof(SegReq), M_DEVBUF, M_NOWAIT); if (ft->bufseg == NULL) { free(ft->curseg, M_DEVBUF); printf("ft%d: not enough memory for buffers\n", ftu); return(ENOMEM); } havebufs = 1; } ft->curseg->reqtype = FTIO_READY; ft->bufseg->reqtype = FTIO_READY; ft->io_sts = FTIO_READY; /* tape drive is ready */ ft->active = 0; /* interrupt driver not active */ ft->moving = 0; /* tape not moving */ ft->rdonly = 0; /* tape read only */ ft->newcart = 0; /* a new cart was inserted */ ft->lastpos = -1; /* tape is rewound */ tape_state(ftu, 0, QS_READY, 60); tape_cmd(ftu, QC_RATE); tape_cmd(ftu, QCF_RT500+2); /* 500K bps */ tape_state(ftu, 0, QS_READY, 60); ft->mode = FTM_PRIMARY; tape_cmd(ftu, QC_PRIMARY); /* Make sure we're in primary mode */ tape_state(ftu, 0, QS_READY, 60); ftg = NULL; /* No geometry yet */ ftgetgeom(ftu); /* Get tape geometry */ ftreq_rewind(ftu); /* Make sure tape is rewound */ } else { tape_cmd(ftu, (ft->type == FT_COLORADO) ? QC_COL_DISABLE : QC_MTN_DISABLE); tape_end(ftu); ft->newcart = 0; /* clear new cartridge */ havebufs = 0; free(ft->curseg, M_DEVBUF); free(ft->bufseg, M_DEVBUF); } return(0); } /* * Perform a QIC status function. */ int qic_status(ftu_t ftu, int cmd, int nbits) { int st3, val, r, i; ft_p ft = &ft_data[ftu]; fdcu_t fdcu = ft->fdc->fdcu; /* fdc active unit */ if (tape_cmd(ftu, cmd)) { DPRT(("ft%d: QIC status timeout\n", ftu)); return(-1); } /* Sense drive status */ out_fdc(fdcu, NE7CMD_SENSED); out_fdc(fdcu, 0x00); st3 = in_fdc(fdcu); if ((st3 & 0x10) == 0) { /* track 0 */ DPRT(("qic_status has dead drive... st3 = $%02x\n", st3)); return(-1); } for (i = r = 0; i <= nbits; i++) { if (tape_cmd(ftu, QC_NEXTBIT)) { DPRT(("ft%d: QIC status bit timed out on %d\n", ftu, i)); return(-1); } out_fdc(fdcu, NE7CMD_SENSED); out_fdc(fdcu, 0x00); st3 = in_fdc(fdcu); if (st3 < 0) { DPRT(("ft%d: controller timed out on bit %d r=$%02x\n", ftu, i, r)); return(-1); } r >>= 1; if (i < nbits) r |= ((st3 & 0x10) ? 1 : 0) << nbits; else if ((st3 & 0x10) == 0) { DPRT(("ft%d: qic status stop bit missing at %d, st3=$%02x r=$%04x\n", ftu,i,st3,r)); return(-1); } } DPRT(("qic_status returned $%02x\n", r)); return(r); } /* * Open tape drive for use. Bounced off of Fdopen if tape minor is * detected. */ int ftopen(dev_t dev, int arg2) { ftu_t ftu = FDUNIT(minor(dev)); int type = FDTYPE(minor(dev)); fdc_p fdc; /* check bounds */ if (ftu >= NFT) return(ENXIO); fdc = ft_data[ftu].fdc; /* check for controller already busy with tape */ if (fdc->flags & FDC_TAPE_BUSY) return(EBUSY); /* make sure we found a tape when probed */ if (!(fdc->flags & FDC_HASFTAPE)) return(ENODEV); fdc->fdu = ftu; fdc->flags |= FDC_TAPE_BUSY; return(set_fdcmode(dev, FDC_TAPE_MODE)); /* try to switch to tape */ } /* * Close tape and return floppy controller to disk mode. */ int ftclose(dev_t dev, int flags) { int s; SegReq *sp; ftu_t ftu = FDUNIT(minor(dev)); ft_p ft = &ft_data[ftu]; /* Wait for any remaining I/O activity to complete. */ if (ft->curseg->reqtype == FTIO_RDAHEAD) ft->curseg->reqcan = 1; while (ft->active) tsleep((caddr_t)&ftsem.iosts_change, FTPRI, "ftclose", 0); ft->mode = FTM_PRIMARY; tape_cmd(ftu, QC_PRIMARY); tape_state(ftu, 0, QS_READY, 60); ftreq_rewind(ftu); return(set_fdcmode(dev, FDC_DISK_MODE)); /* Otherwise, close tape */ } /* * Perform strategy on a given buffer (not!). The driver was not * performing very efficiently using the buffering routines. After * support for error correction was added, this routine became * obsolete in favor of doing ioctl's. Ugly, yes. */ void ftstrategy(struct buf *bp) { return; } /* Read or write a segment. */ int ftreq_rw(ftu_t ftu, int cmd, QIC_Segment *sr, struct proc *p) { int r, i, j; SegReq *sp; int s; long blk, bad; unsigned char *cp, *cp2; ft_p ft = &ft_data[ftu]; if (!ft->active) { r = tape_status(ftu); if ((r & QS_CART) == 0) { return(ENXIO); /* No cartridge */ } if ((r & QS_FMTOK) == 0) { return(ENXIO); /* Not formatted */ } tape_state(ftu, 0, QS_READY, 90); } if (ftg == NULL || ft->newcart) { while (ft->active) tsleep((caddr_t)&ftsem.iosts_change, FTPRI, "ftrw", 0); tape_state(ftu, 0, QS_READY, 90); if (ftgetgeom(ftu) < 0) { return(ENXIO); } } /* Write not allowed on a read-only tape. */ if (cmd == QIOWRITE && ft->rdonly) { return(EROFS); } /* Quick check of request and buffer. */ if (sr == NULL || sr->sg_data == NULL) { return(EINVAL); } if (sr->sg_trk >= ftg->g_trktape || sr->sg_seg >= ftg->g_segtrk) { return(EINVAL); } blk = sr->sg_trk * ftg->g_blktrk + sr->sg_seg * QCV_BLKSEG; s = splbio(); if (cmd == QIOREAD) { if (ft->curseg->reqtype == FTIO_RDAHEAD) { if (blk == ft->curseg->reqblk) { sp = ft->curseg; sp->reqtype = FTIO_READING; sp->reqbad = sr->sg_badmap; goto rdwait; } else ft->curseg->reqcan = 1; /* XXX cancel rdahead */ } /* Wait until we're ready. */ while (ft->active) tsleep((caddr_t)&ftsem.iosts_change, FTPRI, "ftrw", 0); /* Set up a new read request. */ sp = ft->curseg; sp->reqcrc = 0; sp->reqbad = sr->sg_badmap; sp->reqblk = blk; sp->reqcan = 0; sp->reqtype = FTIO_READING; /* Start the read request off. */ DPRT(("Starting read I/O chain\n")); arq_state = ard_state = awr_state = 0; ft->xblk = sp->reqblk; ft->xcnt = 0; ft->xptr = sp->buff; ft->active = 1; timeout(ft_timeout, (caddr_t)ftu, 1); rdwait: tsleep((caddr_t)&ftsem.buff_avail, FTPRI, "ftrw", 0); bad = sp->reqbad; sr->sg_crcmap = sp->reqcrc & ~bad; /* Copy out segment and discard bad mapped blocks. */ cp = sp->buff; cp2 = sr->sg_data; for (i = 0; i < QCV_BLKSEG; cp += QCV_BLKSIZE, i++) { if (bad & (1 << i)) continue; copyout(cp, cp2, QCV_BLKSIZE); cp2 += QCV_BLKSIZE; } } else { if (ft->curseg->reqtype == FTIO_RDAHEAD) { ft->curseg->reqcan = 1; /* XXX cancel rdahead */ while (ft->active) tsleep((caddr_t)&ftsem.iosts_change, FTPRI, "ftrw", 0); } /* Sleep until a buffer becomes available. */ while (ft->bufseg->reqtype != FTIO_READY) tsleep((caddr_t)&ftsem.buff_avail, FTPRI, "ftrwbuf", 0); sp = (ft->curseg->reqtype == FTIO_READY) ? ft->curseg : ft->bufseg; /* Copy in segment and expand bad blocks. */ bad = sr->sg_badmap; cp = sr->sg_data; cp2 = sp->buff; for (i = 0; i < QCV_BLKSEG; cp2 += QCV_BLKSIZE, i++) { if (bad & (1 << i)) continue; copyin(cp, cp2, QCV_BLKSIZE); cp += QCV_BLKSIZE; } sp->reqblk = blk; sp->reqcan = 0; sp->reqtype = FTIO_WRITING; if (!ft->active) { DPRT(("Starting write I/O chain\n")); arq_state = ard_state = awr_state = 0; ft->xblk = sp->reqblk; ft->xcnt = 0; ft->xptr = sp->buff; ft->active = 1; timeout(ft_timeout, (caddr_t)ftu, 1); } } splx(s); return(0); } /* Rewind to beginning of tape */ int ftreq_rewind(ftu_t ftu) { ft_p ft = &ft_data[ftu]; tape_inactive(ftu); tape_cmd(ftu, QC_STOP); tape_state(ftu, 0, QS_READY, 90); tape_cmd(ftu, QC_SEEKSTART); tape_state(ftu, 0, QS_READY, 90); tape_cmd(ftu, QC_SEEKTRACK); tape_cmd(ftu, 2); tape_state(ftu, 0, QS_READY, 90); ft->lastpos = -1; ft->moving = 0; return(0); } /* Move to logical beginning or end of track */ int ftreq_trkpos(ftu_t ftu, int req) { int curtrk, r, cmd; ft_p ft = &ft_data[ftu]; tape_inactive(ftu); tape_cmd(ftu, QC_STOP); tape_state(ftu, 0, QS_READY, 90); r = tape_status(ftu); if ((r & QS_CART) == 0) return(ENXIO); /* No cartridge */ if ((r & QS_FMTOK) == 0) return(ENXIO); /* Not formatted */ if (ftg == NULL || ft->newcart) { if (ftgetgeom(ftu) < 0) return(ENXIO); } curtrk = (ft->lastpos < 0) ? 0 : ft->lastpos / ftg->g_blktrk; if (req == QIOBOT) cmd = (curtrk & 1) ? QC_SEEKEND : QC_SEEKSTART; else cmd = (curtrk & 1) ? QC_SEEKSTART : QC_SEEKEND; tape_cmd(ftu, cmd); tape_state(ftu, 0, QS_READY, 90); return(0); } /* Seek tape head to a particular track. */ int ftreq_trkset(ftu_t ftu, int *trk) { int curtrk, r, cmd; ft_p ft = &ft_data[ftu]; tape_inactive(ftu); tape_cmd(ftu, QC_STOP); tape_state(ftu, 0, QS_READY, 90); r = tape_status(ftu); if ((r & QS_CART) == 0) return(ENXIO); /* No cartridge */ if ((r & QS_FMTOK) == 0) return(ENXIO); /* Not formatted */ if (ftg == NULL || ft->newcart) { if (ftgetgeom(ftu) < 0) return(ENXIO); } tape_cmd(ftu, QC_SEEKTRACK); tape_cmd(ftu, *trk + 2); tape_state(ftu, 0, QS_READY, 90); return(0); } /* Start tape moving forward. */ int ftreq_lfwd(ftu_t ftu) { tape_inactive(ftu); tape_cmd(ftu, QC_STOP); tape_state(ftu, 0, QS_READY, 90); tape_cmd(ftu, QC_FORWARD); return(0); } /* Stop the tape */ int ftreq_stop(ftu_t ftu) { tape_inactive(ftu); tape_cmd(ftu, QC_STOP); tape_state(ftu, 0, QS_READY, 90); return(0); } /* Set the particular mode the drive should be in. */ int ftreq_setmode(ftu_t ftu, int cmd) { int r; ft_p ft = &ft_data[ftu]; tape_inactive(ftu); r = tape_status(ftu); switch(cmd) { case QIOPRIMARY: ft->mode = FTM_PRIMARY; tape_cmd(ftu, QC_PRIMARY); break; case QIOFORMAT: if (r & QS_RDONLY) return(ENXIO); if ((r & QS_BOT) == 0) return(ENXIO); tape_cmd(ftu, QC_FORMAT); break; case QIOVERIFY: if ((r & QS_FMTOK) == 0) return(ENXIO); /* Not formatted */ tape_cmd(ftu, QC_VERIFY); break; } tape_state(ftu, 0, QS_READY, 60); return(0); } /* Return drive status bits */ int ftreq_status(ftu_t ftu, int cmd, int *sts, struct proc *p) { ft_p ft = &ft_data[ftu]; if (ft->active) *sts = ft->laststs & ~QS_READY; else *sts = tape_status(ftu); return(0); } /* Return drive configuration bits */ int ftreq_config(ftu_t ftu, int cmd, int *cfg, struct proc *p) { int r, tries; ft_p ft = &ft_data[ftu]; if (ft->active) r = ft->lastcfg; else { for (r = -1, tries = 0; r < 0 && tries < 3; tries++) r = qic_status(ftu, QC_CONFIG, 8); if (tries == 3) return(ENXIO); } *cfg = r; return(0); } /* Return current tape's geometry. */ int ftreq_geom(ftu_t ftu, QIC_Geom *g) { tape_inactive(ftu); if (ftg == NULL && ftgetgeom(ftu) < 0) return(ENXIO); bcopy(ftg, g, sizeof(QIC_Geom)); return(0); } /* Return drive hardware information */ int ftreq_hwinfo(ftu_t ftu, QIC_HWInfo *hwp) { int r, tries; int rom, vend; tape_inactive(ftu); bzero(hwp, sizeof(QIC_HWInfo)); for (rom = -1, tries = 0; rom < 0 && tries < 3; tries++) rom = qic_status(ftu, QC_VERSION, 8); if (rom > 0) { hwp->hw_rombeta = (rom >> 7) & 0x01; hwp->hw_romid = rom & 0x7f; } for (vend = -1, tries = 0; vend < 0 && tries < 3; tries++) vend = qic_status(ftu, QC_VENDORID, 16); if (vend > 0) { hwp->hw_make = (vend >> 6) & 0x3ff; hwp->hw_model = vend & 0x3f; } return(0); } /* * I/O functions. */ int ftioctl(dev_t dev, int cmd, caddr_t data, int flag, struct proc *p) { ftu_t ftu = FDUNIT(minor(dev)); ft_p ft = &ft_data[ftu]; switch(cmd) { case QIOREAD: /* Request reading a segment from tape. */ case QIOWRITE: /* Request writing a segment to tape. */ return(ftreq_rw(ftu, cmd, (QIC_Segment *)data, p)); case QIOREWIND: /* Rewind tape. */ return(ftreq_rewind(ftu)); case QIOBOT: /* Seek to logical beginning of track. */ case QIOEOT: /* Seek to logical end of track. */ return(ftreq_trkpos(ftu, cmd)); case QIOTRACK: /* Seek tape head to specified track. */ return(ftreq_trkset(ftu, (int *)data)); case QIOSEEKLP: /* Seek load point. */ goto badreq; case QIOFORWARD: /* Move tape in logical forward direction. */ return(ftreq_lfwd(ftu)); case QIOSTOP: /* Causes tape to stop. */ return(ftreq_stop(ftu)); case QIOPRIMARY: /* Enter primary mode. */ case QIOFORMAT: /* Enter format mode. */ case QIOVERIFY: /* Enter verify mode. */ return(ftreq_setmode(ftu, cmd)); case QIOWRREF: /* Write reference burst. */ goto badreq; case QIOSTATUS: /* Get drive status. */ return(ftreq_status(ftu, cmd, (int *)data, p)); case QIOCONFIG: /* Get tape configuration. */ return(ftreq_config(ftu, cmd, (int *)data, p)); case QIOGEOM: return(ftreq_geom(ftu, (QIC_Geom *)data)); case QIOHWINFO: return(ftreq_hwinfo(ftu, (QIC_HWInfo *)data)); } badreq: DPRT(("ft%d: unknown ioctl(%d) request\n", ftu, cmd)); return(ENXIO); } /* Not implemented */ int ftdump(dev_t dev) { return(EINVAL); } /* Not implemented */ int ftsize(dev_t dev) { return(EINVAL); } #endif