46f3ff7986
- ppbus now supports PLIP via the if_plip driver - ieee1284 infrastructure added, including parallel-port PnP - port microsequencer added, for scripting the sort of port I/O that is common with parallel devices without endless calls up and down through the driver structure. - improved bus ownership behaviour among the ppbus-using drivers. - improved I/O chipset feature detection The vpo driver is now implemented using the microsequencer, leading to some performance improvements as well as providing an extensive example of its use. Reviewed by: msmith Submitted by: Nicolas Souchu <Nicolas.Souchu@prism.uvsq.fr>
772 lines
17 KiB
C
772 lines
17 KiB
C
/*-
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* Copyright (c) 1998 Nicolas Souchu
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: vpoio.c,v 1.1.2.4 1998/06/16 23:35:52 son Exp $
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*
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*/
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#ifdef KERNEL
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/buf.h>
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#include <machine/clock.h>
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#endif /* KERNEL */
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#ifdef KERNEL
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#include <sys/kernel.h>
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#endif /*KERNEL */
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#include <dev/ppbus/ppbconf.h>
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#include <dev/ppbus/ppb_msq.h>
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#include <dev/ppbus/vpoio.h>
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/*
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* The driver pools the drive. We may add a timeout queue to avoid
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* active polling on nACK. I've tried this but it leads to unreliable
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* transfers
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*/
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#define VP0_SELTMO 5000 /* select timeout */
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#define VP0_FAST_SPINTMO 500000 /* wait status timeout */
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#define VP0_LOW_SPINTMO 5000000 /* wait status timeout */
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/*
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* Actually, VP0 timings are more accurate (about few 16MHZ cycles),
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* but succeeding in respecting such timings leads to architecture
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* dependent considerations.
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*/
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#define VP0_PULSE 1
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#define VP0_SECTOR_SIZE 512
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#define VP0_BUFFER_SIZE 0x12000
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#define n(flags) (~(flags) & (flags))
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/*
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* VP0 connections.
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*/
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#define H_AUTO n(AUTOFEED)
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#define H_nAUTO AUTOFEED
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#define H_STROBE n(STROBE)
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#define H_nSTROBE STROBE
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#define H_BSY n(nBUSY)
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#define H_nBSY nBUSY
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#define H_SEL SELECT
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#define H_nSEL n(SELECT)
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#define H_ERR ERROR
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#define H_nERR n(ERROR)
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#define H_ACK nACK
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#define H_nACK n(nACK)
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#define H_FLT nFAULT
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#define H_nFLT n(nFAULT)
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#define H_SELIN n(SELECTIN)
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#define H_nSELIN SELECTIN
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#define H_INIT nINIT
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#define H_nINIT n(nINIT)
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/*
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* Microcode to execute very fast I/O sequences at the lowest bus level.
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*/
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#define trig_d_pulse MS_TRIG(MS_REG_CTR,5,(int)d_pulse)
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char d_pulse[] = {
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H_AUTO | H_nSELIN | H_INIT | H_STROBE, 0,
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H_nAUTO | H_nSELIN | H_INIT | H_STROBE, VP0_PULSE,
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H_AUTO | H_nSELIN | H_INIT | H_STROBE, 0,
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H_AUTO | H_SELIN | H_INIT | H_STROBE, VP0_PULSE,
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H_AUTO | H_nSELIN | H_INIT | H_STROBE, VP0_PULSE
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};
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#define trig_c_pulse MS_TRIG(MS_REG_CTR,5,(int)c_pulse)
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char c_pulse[] = {
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H_AUTO | H_nSELIN | H_INIT | H_STROBE, 0,
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H_AUTO | H_SELIN | H_INIT | H_STROBE, 0,
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H_nAUTO | H_SELIN | H_INIT | H_STROBE, VP0_PULSE,
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H_AUTO | H_SELIN | H_INIT | H_STROBE, 0,
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H_AUTO | H_nSELIN | H_INIT | H_STROBE, VP0_PULSE
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};
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struct ppb_microseq disconnect_microseq[] = {
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MS_DASS(0x0), trig_d_pulse, MS_DASS(0x3c), trig_d_pulse,
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MS_DASS(0x20), trig_d_pulse, MS_DASS(0xf), trig_d_pulse, MS_RET(0)
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};
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struct ppb_microseq connect_epp_microseq[] = {
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MS_DASS(0x0), trig_c_pulse, MS_DASS(0x3c), trig_c_pulse,
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MS_DASS(0x20), trig_c_pulse, MS_DASS(0xcf), trig_c_pulse, MS_RET(0)
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};
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struct ppb_microseq connect_spp_microseq[] = {
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MS_DASS(0x0), trig_c_pulse, MS_DASS(0x3c), trig_c_pulse,
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MS_DASS(0x20), trig_c_pulse, MS_DASS(0x8f), trig_c_pulse, MS_RET(0)
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};
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/*
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* nibble_inbyte_hook()
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*
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* Formats high and low nibble into a character
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*/
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static int
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nibble_inbyte_hook (void *p, char *ptr)
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{
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struct vpo_nibble *s = (struct vpo_nibble *)p;
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/* increment the buffer pointer */
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*ptr++ = ((s->l >> 4) & 0x0f) + (s->h & 0xf0);
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return (0);
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}
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/*
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* Macro used to initialize each vpoio_data structure during
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* low level attachment
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*/
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#define INIT_NIBBLE_INBYTE_SUBMICROSEQ(vpo) { \
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(vpo)->vpo_nibble_inbyte_msq[2].arg[2].p = \
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(void *)&(vpo)->vpo_nibble.h; \
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(vpo)->vpo_nibble_inbyte_msq[4].arg[2].p = \
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(void *)&(vpo)->vpo_nibble.l; \
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(vpo)->vpo_nibble_inbyte_msq[5].arg[0].f = \
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nibble_inbyte_hook; \
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(vpo)->vpo_nibble_inbyte_msq[5].arg[1].p = \
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(void *)&(vpo)->vpo_nibble; \
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}
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/*
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* This is the sub-microseqence for MS_GET in NIBBLE mode
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* Retrieve the two nibbles and call the C function to generate the character
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* and store it in the buffer (see nibble_inbyte_hook())
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*/
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struct ppb_microseq nibble_inbyte_submicroseq[] = {
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/* loop: */
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MS_CASS( H_AUTO | H_SELIN | H_INIT | H_STROBE),
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MS_DELAY(VP0_PULSE),
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MS_RFETCH(MS_REG_STR, MS_FETCH_ALL, MS_UNKNOWN /* high nibble */),
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MS_CASS(H_nAUTO | H_SELIN | H_INIT | H_STROBE),
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MS_RFETCH(MS_REG_STR, MS_FETCH_ALL, MS_UNKNOWN /* low nibble */),
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/* do a C call to format the received nibbles */
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MS_C_CALL(MS_UNKNOWN /* C hook */, MS_UNKNOWN /* param */),
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MS_DBRA(-6 /* loop */),
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MS_CASS(H_AUTO | H_nSELIN | H_INIT | H_STROBE),
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MS_RET(0)
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};
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/*
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* This is the sub-microseqence for MS_GET in PS2 mode
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*/
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struct ppb_microseq ps2_inbyte_submicroseq[] = {
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MS_CASS(PCD | H_AUTO | H_SELIN | H_INIT | H_nSTROBE),
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/* loop: */
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MS_RFETCH_P(1, MS_REG_DTR, MS_FETCH_ALL),
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MS_CASS(PCD | H_nAUTO | H_SELIN | H_INIT | H_nSTROBE),
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MS_CASS(PCD | H_AUTO | H_SELIN | H_INIT | H_nSTROBE),
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MS_DBRA(-3 /* loop */),
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MS_CASS(H_AUTO | H_nSELIN | H_INIT | H_STROBE),
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MS_RET(0)
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};
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/*
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* This is the sub-microsequence for MS_PUT in both NIBBLE and PS2 modes
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*/
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struct ppb_microseq spp_outbyte_submicroseq[] = {
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/* loop: */
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MS_RASSERT_P(1, MS_REG_DTR),
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MS_CASS(H_nAUTO | H_nSELIN | H_INIT | H_STROBE),
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MS_CASS( H_AUTO | H_nSELIN | H_INIT | H_STROBE),
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MS_DELAY(VP0_PULSE),
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MS_DBRA(-4 /* loop */),
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/* return from the put call */
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MS_RET(0)
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};
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/* EPP 1.7 microsequences, ptr and len set at runtime */
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struct ppb_microseq epp17_outstr_body[] = {
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MS_CASS(H_AUTO | H_SELIN | H_INIT | H_STROBE),
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/* loop: */
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MS_RASSERT_P(1, MS_REG_EPP),
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MS_BRSET(TIMEOUT, 4 /* error */), /* EPP timeout? */
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MS_DBRA(-2 /* loop */),
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MS_CASS(H_AUTO | H_nSELIN | H_INIT | H_STROBE),
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MS_RET(0),
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/* error: */
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MS_CASS(H_AUTO | H_nSELIN | H_INIT | H_STROBE),
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MS_RET(1)
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};
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struct ppb_microseq epp17_instr_body[] = {
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MS_CASS(PCD | H_AUTO | H_SELIN | H_INIT | H_STROBE),
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/* loop: */
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MS_RFETCH_P(1, MS_REG_EPP, MS_FETCH_ALL),
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MS_BRSET(TIMEOUT, 4 /* error */), /* EPP timeout? */
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MS_DBRA(-2 /* loop */),
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MS_CASS(PCD | H_AUTO | H_nSELIN | H_INIT | H_STROBE),
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MS_RET(0),
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/* error: */
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MS_CASS(PCD | H_AUTO | H_nSELIN | H_INIT | H_STROBE),
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MS_RET(1)
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};
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static int
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vpoio_disconnect(struct vpoio_data *vpo)
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{
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int ret;
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ppb_MS_microseq(&vpo->vpo_dev, disconnect_microseq, &ret);
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return (ppb_release_bus(&vpo->vpo_dev));
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}
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/*
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* how : PPB_WAIT or PPB_DONTWAIT
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*/
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static int
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vpoio_connect(struct vpoio_data *vpo, int how)
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{
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int error;
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int ret;
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if ((error = ppb_request_bus(&vpo->vpo_dev, how)))
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return error;
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if (PPB_IN_EPP_MODE(&vpo->vpo_dev))
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ppb_MS_microseq(&vpo->vpo_dev, connect_epp_microseq, &ret);
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else
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ppb_MS_microseq(&vpo->vpo_dev, connect_spp_microseq, &ret);
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return (0);
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}
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/*
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* vpoio_in_disk_mode()
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*
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* Check if we are in disk mode
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*
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* XXX should be ported to microseq with MS_ASSERT()
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*/
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static int
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vpoio_in_disk_mode(struct vpoio_data *vpo)
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{
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/* first, set H_AUTO high */
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ppb_wctr(&vpo->vpo_dev, H_AUTO | H_nSELIN | H_INIT | H_STROBE);
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/* when H_AUTO is set low, H_FLT should be high */
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ppb_wctr(&vpo->vpo_dev, H_nAUTO | H_nSELIN | H_INIT | H_STROBE);
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if ((ppb_rstr(&vpo->vpo_dev) & H_FLT) == 0)
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return (0);
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/* when H_AUTO is set high, H_FLT should be low */
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ppb_wctr(&vpo->vpo_dev, H_AUTO | H_nSELIN | H_INIT | H_STROBE);
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if ((ppb_rstr(&vpo->vpo_dev) & H_FLT) != 0)
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return (0);
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return (1);
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}
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/*
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* vpoio_reset()
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*
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* SCSI reset signal, the drive must be in disk mode
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*
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* XXX should be ported to microseq with MS_TRIG()
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*/
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static void
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vpoio_reset (struct vpoio_data *vpo)
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{
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/*
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* SCSI reset signal.
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*/
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ppb_wdtr(&vpo->vpo_dev, (1 << VP0_INITIATOR));
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ppb_wctr(&vpo->vpo_dev, H_AUTO | H_nSELIN | H_nINIT | H_STROBE);
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DELAY(25);
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ppb_wctr(&vpo->vpo_dev, H_AUTO | H_nSELIN | H_INIT | H_STROBE);
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return;
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}
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/*
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* vpoio_detect()
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*
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* Detect and initialise the VP0 adapter.
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*/
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int
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vpoio_detect(struct vpoio_data *vpo)
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{
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vpoio_disconnect(vpo);
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vpoio_connect(vpo, PPB_DONTWAIT);
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if (!vpoio_in_disk_mode(vpo)) {
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vpoio_disconnect(vpo);
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return (VP0_EINITFAILED);
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}
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/* send SCSI reset signal */
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vpoio_reset(vpo);
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vpoio_disconnect(vpo);
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if (vpoio_in_disk_mode(vpo))
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return (VP0_EINITFAILED);
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return (0);
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}
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/*
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* vpoio_outstr()
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*/
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static int
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vpoio_outstr(struct vpoio_data *vpo, char *buffer, int size)
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{
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int error = 0;
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ppb_MS_exec(&vpo->vpo_dev, MS_OP_PUT, buffer, size, MS_UNKNOWN, &error);
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#if 0
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/* XXX EPP 1.9 not implemented with microsequences */
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else {
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ppb_reset_epp_timeout(&vpo->vpo_dev);
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ppb_wctr(&vpo->vpo_dev,
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H_AUTO | H_SELIN | H_INIT | H_STROBE);
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if (((long) buffer | size) & 0x03)
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ppb_outsb_epp(&vpo->vpo_dev,
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buffer, size);
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else
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ppb_outsl_epp(&vpo->vpo_dev,
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buffer, size/4);
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if ((ppb_rstr(&vpo->vpo_dev) & TIMEOUT)) {
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error = VP0_EPPDATA_TIMEOUT;
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goto error;
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}
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ppb_wctr(&vpo->vpo_dev,
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H_AUTO | H_nSELIN | H_INIT | H_STROBE);
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}
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/* ppb_ecp_sync(&vpo->vpo_dev); */
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#endif
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return (error);
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}
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/*
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* vpoio_instr()
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*/
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static int
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vpoio_instr(struct vpoio_data *vpo, char *buffer, int size)
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{
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register int k;
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int error = 0;
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int r, mode, epp;
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ppb_MS_exec(&vpo->vpo_dev, MS_OP_GET, buffer, size, MS_UNKNOWN, &error);
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#if 0
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/* XXX EPP 1.9 not implemented with microsequences */
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else {
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ppb_reset_epp_timeout(&vpo->vpo_dev);
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ppb_wctr(&vpo->vpo_dev, PCD |
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H_AUTO | H_SELIN | H_INIT | H_STROBE);
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if (((long) buffer | size) & 0x03)
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ppb_insb_epp(&vpo->vpo_dev,
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buffer, size);
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else
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ppb_insl_epp(&vpo->vpo_dev,
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buffer, size/4);
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if ((ppb_rstr(&vpo->vpo_dev) & TIMEOUT)) {
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error = VP0_EPPDATA_TIMEOUT;
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goto error;
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}
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ppb_wctr(&vpo->vpo_dev, PCD |
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H_AUTO | H_nSELIN | H_INIT | H_STROBE);
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}
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/* ppb_ecp_sync(&vpo->vpo_dev); */
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#endif
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return (error);
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}
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static char
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vpoio_select(struct vpoio_data *vpo, int initiator, int target)
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{
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register int k;
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int ret;
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struct ppb_microseq select_microseq[] = {
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/* parameter list
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*/
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#define SELECT_TARGET MS_PARAM(0, 1, MS_TYP_INT)
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#define SELECT_INITIATOR MS_PARAM(3, 1, MS_TYP_INT)
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/* send the select command to the drive */
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MS_DASS(MS_UNKNOWN),
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MS_CASS(H_nAUTO | H_nSELIN | H_INIT | H_STROBE),
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MS_CASS( H_AUTO | H_nSELIN | H_INIT | H_STROBE),
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MS_DASS(MS_UNKNOWN),
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MS_CASS( H_AUTO | H_nSELIN | H_nINIT | H_STROBE),
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/* now, wait until the drive is ready */
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MS_SET(VP0_SELTMO),
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/* loop: */ MS_BRSET(H_ACK, 3 /* ready */),
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MS_DBRA(-1 /* loop */),
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/* error: */ MS_RET(1),
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/* ready: */ MS_RET(0)
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};
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/* initialize the select microsequence */
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ppb_MS_init_msq(select_microseq, 2,
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SELECT_TARGET, 1 << target,
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SELECT_INITIATOR, 1 << initiator);
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ppb_MS_microseq(&vpo->vpo_dev, select_microseq, &ret);
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if (ret)
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|
return (VP0_ESELECT_TIMEOUT);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* vpoio_wait()
|
|
*
|
|
* H_SELIN must be low.
|
|
*
|
|
* XXX should be ported to microseq
|
|
*/
|
|
static char
|
|
vpoio_wait(struct vpoio_data *vpo, int tmo)
|
|
{
|
|
|
|
register int k;
|
|
register char r;
|
|
|
|
#if 0 /* broken */
|
|
if (ppb_poll_device(&vpo->vpo_dev, 150, nBUSY, nBUSY, PPB_INTR))
|
|
return (0);
|
|
|
|
return (ppb_rstr(&vpo->vpo_dev) & 0xf0);
|
|
#endif
|
|
|
|
/* XXX should be ported to microseq */
|
|
k = 0;
|
|
while (!((r = ppb_rstr(&vpo->vpo_dev)) & nBUSY) && (k++ < tmo))
|
|
;
|
|
|
|
/*
|
|
* Return some status information.
|
|
* Semantics : 0xc0 = ZIP wants more data
|
|
* 0xd0 = ZIP wants to send more data
|
|
* 0xe0 = ZIP wants command
|
|
* 0xf0 = end of transfer, ZIP is sending status
|
|
*/
|
|
if (k < tmo)
|
|
return (r & 0xf0);
|
|
|
|
return (0); /* command timed out */
|
|
}
|
|
|
|
/*
|
|
* vpoio_probe()
|
|
*
|
|
* Low level probe of vpo device
|
|
*
|
|
*/
|
|
struct ppb_device *
|
|
vpoio_probe(struct ppb_data *ppb, struct vpoio_data *vpo)
|
|
{
|
|
|
|
/* ppbus dependent initialisation */
|
|
vpo->vpo_dev.id_unit = vpo->vpo_unit;
|
|
vpo->vpo_dev.name = "vpo";
|
|
vpo->vpo_dev.ppb = ppb;
|
|
|
|
/* now, try to initialise the drive */
|
|
if (vpoio_detect(vpo)) {
|
|
return (NULL);
|
|
}
|
|
|
|
return (&vpo->vpo_dev);
|
|
}
|
|
|
|
/*
|
|
* vpoio_attach()
|
|
*
|
|
* Low level attachment of vpo device
|
|
*
|
|
*/
|
|
int
|
|
vpoio_attach(struct vpoio_data *vpo)
|
|
{
|
|
int epp;
|
|
|
|
/*
|
|
* Report ourselves
|
|
*/
|
|
printf("vpo%d: <Iomega VPI0 Parallel to SCSI adapter> on ppbus %d\n",
|
|
vpo->vpo_dev.id_unit, vpo->vpo_dev.ppb->ppb_link->adapter_unit);
|
|
|
|
/*
|
|
* Initialize microsequence code
|
|
*/
|
|
vpo->vpo_nibble_inbyte_msq = (struct ppb_microseq *)malloc(
|
|
sizeof(nibble_inbyte_submicroseq), M_DEVBUF, M_NOWAIT);
|
|
|
|
if (!vpo->vpo_nibble_inbyte_msq)
|
|
return (0);
|
|
|
|
bcopy((void *)nibble_inbyte_submicroseq,
|
|
(void *)vpo->vpo_nibble_inbyte_msq,
|
|
sizeof(nibble_inbyte_submicroseq));
|
|
|
|
INIT_NIBBLE_INBYTE_SUBMICROSEQ(vpo);
|
|
|
|
/*
|
|
* Initialize mode dependent in/out microsequences
|
|
*/
|
|
ppb_request_bus(&vpo->vpo_dev, PPB_WAIT);
|
|
|
|
/* enter NIBBLE mode to configure submsq */
|
|
if (ppb_set_mode(&vpo->vpo_dev, PPB_NIBBLE) != -1) {
|
|
|
|
ppb_MS_GET_init(&vpo->vpo_dev, vpo->vpo_nibble_inbyte_msq);
|
|
|
|
ppb_MS_PUT_init(&vpo->vpo_dev, spp_outbyte_submicroseq);
|
|
}
|
|
|
|
/* enter PS2 mode to configure submsq */
|
|
if (ppb_set_mode(&vpo->vpo_dev, PPB_PS2) != -1) {
|
|
|
|
ppb_MS_GET_init(&vpo->vpo_dev, ps2_inbyte_submicroseq);
|
|
|
|
ppb_MS_PUT_init(&vpo->vpo_dev, spp_outbyte_submicroseq);
|
|
}
|
|
|
|
epp = ppb_get_epp_protocol(&vpo->vpo_dev);
|
|
|
|
/* enter EPP mode to configure submsq */
|
|
if (ppb_set_mode(&vpo->vpo_dev, PPB_EPP) != -1) {
|
|
|
|
switch (epp) {
|
|
case EPP_1_9:
|
|
/* XXX EPP 1.9 support should be improved */
|
|
case EPP_1_7:
|
|
ppb_MS_GET_init(&vpo->vpo_dev, epp17_instr_body);
|
|
|
|
ppb_MS_PUT_init(&vpo->vpo_dev, epp17_outstr_body);
|
|
break;
|
|
default:
|
|
panic("%s: unknown EPP protocol (0x%x)", __FUNCTION__,
|
|
epp);
|
|
}
|
|
}
|
|
|
|
/* try to enter EPP or PS/2 mode, NIBBLE otherwise */
|
|
if (ppb_set_mode(&vpo->vpo_dev, PPB_EPP) != -1) {
|
|
switch (epp) {
|
|
case EPP_1_9:
|
|
printf("vpo%d: EPP 1.9 mode\n", vpo->vpo_unit);
|
|
break;
|
|
case EPP_1_7:
|
|
printf("vpo%d: EPP 1.7 mode\n", vpo->vpo_unit);
|
|
break;
|
|
default:
|
|
panic("%s: unknown EPP protocol (0x%x)", __FUNCTION__,
|
|
epp);
|
|
}
|
|
} else if (ppb_set_mode(&vpo->vpo_dev, PPB_PS2) != -1)
|
|
printf("vpo%d: PS2 mode\n", vpo->vpo_unit);
|
|
|
|
else if (ppb_set_mode(&vpo->vpo_dev, PPB_NIBBLE) != -1)
|
|
printf("vpo%d: NIBBLE mode\n", vpo->vpo_unit);
|
|
|
|
else {
|
|
printf("vpo%d: can't enter NIBBLE, PS2 or EPP mode\n",
|
|
vpo->vpo_unit);
|
|
|
|
ppb_release_bus(&vpo->vpo_dev);
|
|
|
|
free(vpo->vpo_nibble_inbyte_msq, M_DEVBUF);
|
|
return (0);
|
|
}
|
|
|
|
ppb_release_bus(&vpo->vpo_dev);
|
|
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* vpoio_reset_bus()
|
|
*
|
|
*/
|
|
int
|
|
vpoio_reset_bus(struct vpoio_data *vpo)
|
|
{
|
|
/* first, connect to the drive */
|
|
if (vpoio_connect(vpo, PPB_WAIT|PPB_INTR) ||
|
|
(vpoio_in_disk_mode(vpo) == 0)) {
|
|
|
|
/* release ppbus */
|
|
vpoio_disconnect(vpo);
|
|
return (1);
|
|
}
|
|
|
|
/* reset the SCSI bus */
|
|
vpoio_reset(vpo);
|
|
|
|
/* then disconnect */
|
|
vpoio_disconnect(vpo);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* vpoio_do_scsi()
|
|
*
|
|
* Send an SCSI command
|
|
*
|
|
*/
|
|
int
|
|
vpoio_do_scsi(struct vpoio_data *vpo, int host, int target, char *command,
|
|
int clen, char *buffer, int blen, int *result, int *count,
|
|
int *ret)
|
|
{
|
|
|
|
register char r;
|
|
char l, h = 0;
|
|
int len, error = 0;
|
|
register int k;
|
|
|
|
/*
|
|
* enter disk state, allocate the ppbus
|
|
*
|
|
* XXX
|
|
* Should we allow this call to be interruptible?
|
|
* The only way to report the interruption is to return
|
|
* EIO do upper SCSI code :^(
|
|
*/
|
|
if ((error = vpoio_connect(vpo, PPB_WAIT|PPB_INTR)))
|
|
return (error);
|
|
|
|
if (!vpoio_in_disk_mode(vpo)) {
|
|
*ret = VP0_ECONNECT; goto error;
|
|
}
|
|
|
|
if ((*ret = vpoio_select(vpo,host,target)))
|
|
goto error;
|
|
|
|
/*
|
|
* Send the command ...
|
|
*
|
|
* set H_SELIN low for vpoio_wait().
|
|
*/
|
|
ppb_wctr(&vpo->vpo_dev, H_AUTO | H_nSELIN | H_INIT | H_STROBE);
|
|
|
|
for (k = 0; k < clen; k++) {
|
|
if (vpoio_wait(vpo, VP0_FAST_SPINTMO) != (char)0xe0) {
|
|
*ret = VP0_ECMD_TIMEOUT;
|
|
goto error;
|
|
}
|
|
if (vpoio_outstr(vpo, &command[k], 1)) {
|
|
*ret = VP0_EPPDATA_TIMEOUT;
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Completion ...
|
|
*/
|
|
|
|
*count = 0;
|
|
for (;;) {
|
|
|
|
if (!(r = vpoio_wait(vpo, VP0_LOW_SPINTMO))) {
|
|
*ret = VP0_ESTATUS_TIMEOUT; goto error;
|
|
}
|
|
|
|
/* stop when the ZIP wants to send status */
|
|
if (r == (char)0xf0)
|
|
break;
|
|
|
|
if (*count >= blen) {
|
|
*ret = VP0_EDATA_OVERFLOW;
|
|
goto error;
|
|
}
|
|
len = (((blen - *count) >= VP0_SECTOR_SIZE)) ?
|
|
VP0_SECTOR_SIZE : 1;
|
|
|
|
/* ZIP wants to send data? */
|
|
if (r == (char)0xc0)
|
|
error = vpoio_outstr(vpo, &buffer[*count], len);
|
|
else
|
|
error = vpoio_instr(vpo, &buffer[*count], len);
|
|
|
|
if (error) {
|
|
*ret = error;
|
|
goto error;
|
|
}
|
|
|
|
*count += len;
|
|
}
|
|
|
|
if (vpoio_instr(vpo, &l, 1)) {
|
|
*ret = VP0_EOTHER; goto error;
|
|
}
|
|
|
|
/* check if the ZIP wants to send more status */
|
|
if (vpoio_wait(vpo, VP0_FAST_SPINTMO) == (char)0xf0)
|
|
if (vpoio_instr(vpo, &h, 1)) {
|
|
*ret = VP0_EOTHER+2; goto error;
|
|
}
|
|
|
|
*result = ((int) h << 8) | ((int) l & 0xff);
|
|
|
|
error:
|
|
/* return to printer state, release the ppbus */
|
|
vpoio_disconnect(vpo);
|
|
return (0);
|
|
}
|