/* $NecBSD: nsp.c,v 1.21.12.6 2001/06/29 06:27:52 honda Exp $ */ /* $NetBSD$ */ #define NSP_DEBUG #define NSP_STATICS #define NSP_IO_CONTROL_FLAGS \ (NSP_READ_SUSPEND_IO | NSP_WRITE_SUSPEND_IO | \ NSP_READ_FIFO_INTERRUPTS | NSP_WRITE_FIFO_INTERRUPTS | \ NSP_USE_MEMIO | NSP_WAIT_FOR_SELECT) /*- * Copyright (c) 1998, 1999, 2000, 2001 * NetBSD/pc98 porting staff. All rights reserved. * * Copyright (c) 1998, 1999, 2000, 2001 * Naofumi HONDA. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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. */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include /*************************************************** * USER SETTINGS ***************************************************/ /* DEVICE CONFIGURATION FLAGS (MINOR) * * 0x01 DISCONNECT OFF * 0x02 PARITY LINE OFF * 0x04 IDENTIFY MSG OFF ( = single lun) * 0x08 SYNC TRANSFER OFF */ /*************************************************** * PARAMS ***************************************************/ #define NSP_NTARGETS 8 #define NSP_NLUNS 8 #define NSP_MAX_DATA_SIZE (64 * 1024) #define NSP_SELTIMEOUT (200) #define NSP_DELAY_MAX (2 * 1000 * 1000) #define NSP_DELAY_INTERVAL (1) #define NSP_TIMER_1MS (1000 / 51) /*************************************************** * DEBUG ***************************************************/ #ifdef NSP_DEBUG int nsp_debug; #endif /* NSP_DEBUG */ #ifdef NSP_STATICS struct nsp_statics { int arbit_conflict_1; int arbit_conflict_2; int device_data_write; int device_busy; int disconnect; int reselect; int data_phase_bypass; } nsp_statics; #endif /* NSP_STATICS */ /*************************************************** * IO control ***************************************************/ #define NSP_READ_SUSPEND_IO 0x0001 #define NSP_WRITE_SUSPEND_IO 0x0002 #define NSP_USE_MEMIO 0x0004 #define NSP_READ_FIFO_INTERRUPTS 0x0010 #define NSP_WRITE_FIFO_INTERRUPTS 0x0020 #define NSP_WAIT_FOR_SELECT 0x0100 u_int nsp_io_control = NSP_IO_CONTROL_FLAGS; int nsp_read_suspend_bytes = DEV_BSIZE; int nsp_write_suspend_bytes = DEV_BSIZE; int nsp_read_interrupt_bytes = 4096; int nsp_write_interrupt_bytes = 4096; /*************************************************** * DEVICE STRUCTURE ***************************************************/ extern struct cfdriver nsp_cd; /************************************************************** * DECLARE **************************************************************/ #define NSP_FIFO_ON 1 #define NSP_FIFO_OFF 0 static void nsp_pio_read(struct nsp_softc *, int); static void nsp_pio_write(struct nsp_softc *, int); static int nsp_xfer(struct nsp_softc *, u_int8_t *, int, int, int); static int nsp_msg(struct nsp_softc *, struct targ_info *, u_int); static int nsp_reselected(struct nsp_softc *); static int nsp_disconnected(struct nsp_softc *, struct targ_info *); static void nsp_pdma_end(struct nsp_softc *, struct targ_info *); static void nsphw_init(struct nsp_softc *); static int nsp_target_nexus_establish(struct nsp_softc *); static int nsp_lun_nexus_establish(struct nsp_softc *); static int nsp_ccb_nexus_establish(struct nsp_softc *); static int nsp_world_start(struct nsp_softc *, int); static int nsphw_start_selection(struct nsp_softc *sc, struct slccb *); static void nsphw_bus_reset(struct nsp_softc *); static void nsphw_attention(struct nsp_softc *); static u_int nsp_fifo_count(struct nsp_softc *); static u_int nsp_request_count(struct nsp_softc *); static int nsp_negate_signal(struct nsp_softc *, u_int8_t, u_char *); static int nsp_expect_signal(struct nsp_softc *, u_int8_t, u_int8_t); static void nsp_start_timer(struct nsp_softc *, int); static void nsp_setup_fifo(struct nsp_softc *, int, int, int); static int nsp_targ_init(struct nsp_softc *, struct targ_info *, int); static void nsphw_selection_done_and_expect_msgout(struct nsp_softc *); static void nsp_data_padding(struct nsp_softc *, int, u_int); static int nsp_timeout(struct nsp_softc *); static int nsp_read_fifo(struct nsp_softc *, int); static int nsp_write_fifo(struct nsp_softc *, int); static int nsp_phase_match(struct nsp_softc *, u_int8_t, u_int8_t); static int nsp_wait_interrupt(struct nsp_softc *); struct scsi_low_funcs nspfuncs = { SC_LOW_INIT_T nsp_world_start, SC_LOW_BUSRST_T nsphw_bus_reset, SC_LOW_TARG_INIT_T nsp_targ_init, SC_LOW_LUN_INIT_T NULL, SC_LOW_SELECT_T nsphw_start_selection, SC_LOW_NEXUS_T nsp_lun_nexus_establish, SC_LOW_NEXUS_T nsp_ccb_nexus_establish, SC_LOW_ATTEN_T nsphw_attention, SC_LOW_MSG_T nsp_msg, SC_LOW_TIMEOUT_T nsp_timeout, SC_LOW_POLL_T nspintr, NULL, }; /**************************************************** * hwfuncs ****************************************************/ static __inline u_int8_t nsp_cr_read_1(bus_space_tag_t bst, bus_space_handle_t bsh, bus_addr_t ofs); static __inline void nsp_cr_write_1(bus_space_tag_t bst, bus_space_handle_t bsh, bus_addr_t ofs, u_int8_t va); static __inline u_int8_t nsp_cr_read_1(bst, bsh, ofs) bus_space_tag_t bst; bus_space_handle_t bsh; bus_addr_t ofs; { bus_space_write_1(bst, bsh, nsp_idxr, ofs); return bus_space_read_1(bst, bsh, nsp_datar); } static __inline void nsp_cr_write_1(bus_space_tag_t bst, bus_space_handle_t bsh, bus_addr_t ofs, u_int8_t va) { bus_space_write_1(bst, bsh, nsp_idxr, ofs); bus_space_write_1(bst, bsh, nsp_datar, va); } static int nsp_expect_signal(struct nsp_softc *sc, u_int8_t curphase, u_int8_t mask) { struct scsi_low_softc *slp = &sc->sc_sclow; bus_space_tag_t bst = sc->sc_iot; bus_space_handle_t bsh = sc->sc_ioh; int wc; u_int8_t ph, isrc; for (wc = 0; wc < NSP_DELAY_MAX / NSP_DELAY_INTERVAL; wc ++) { ph = nsp_cr_read_1(bst, bsh, NSPR_SCBUSMON); if (ph == (u_int8_t) -1) return -1; isrc = bus_space_read_1(bst, bsh, nsp_irqsr); if (isrc & IRQSR_SCSI) return 0; if ((ph & mask) != 0 && (ph & SCBUSMON_PHMASK) == curphase) return 1; DELAY(NSP_DELAY_INTERVAL); } device_printf(slp->sl_dev, "nsp_expect_signal timeout\n"); return -1; } static void nsphw_init(sc) struct nsp_softc *sc; { bus_space_tag_t bst = sc->sc_iot; bus_space_handle_t bsh = sc->sc_ioh; /* block all interrupts */ bus_space_write_1(bst, bsh, nsp_irqcr, IRQCR_ALLMASK); /* setup SCSI interface */ bus_space_write_1(bst, bsh, nsp_ifselr, IFSELR_IFSEL); nsp_cr_write_1(bst, bsh, NSPR_SCIENR, 0); nsp_cr_write_1(bst, bsh, NSPR_XFERMR, XFERMR_IO8); nsp_cr_write_1(bst, bsh, NSPR_CLKDIVR, sc->sc_iclkdiv); nsp_cr_write_1(bst, bsh, NSPR_SCIENR, sc->sc_icr); nsp_cr_write_1(bst, bsh, NSPR_PARITYR, sc->sc_parr); nsp_cr_write_1(bst, bsh, NSPR_PTCLRR, PTCLRR_ACK | PTCLRR_REQ | PTCLRR_HOST | PTCLRR_RSS); /* setup fifo asic */ bus_space_write_1(bst, bsh, nsp_ifselr, IFSELR_REGSEL); nsp_cr_write_1(bst, bsh, NSPR_TERMPWRC, 0); if ((nsp_cr_read_1(bst, bsh, NSPR_OCR) & OCR_TERMPWRS) == 0) nsp_cr_write_1(bst, bsh, NSPR_TERMPWRC, TERMPWRC_POWON); nsp_cr_write_1(bst, bsh, NSPR_XFERMR, XFERMR_IO8); nsp_cr_write_1(bst, bsh, NSPR_CLKDIVR, sc->sc_clkdiv); nsp_cr_write_1(bst, bsh, NSPR_TIMERCNT, 0); nsp_cr_write_1(bst, bsh, NSPR_TIMERCNT, 0); nsp_cr_write_1(bst, bsh, NSPR_SYNCR, 0); nsp_cr_write_1(bst, bsh, NSPR_ACKWIDTH, 0); /* enable interrupts and ack them */ nsp_cr_write_1(bst, bsh, NSPR_SCIENR, sc->sc_icr); bus_space_write_1(bst, bsh, nsp_irqcr, IRQSR_MASK); nsp_setup_fifo(sc, NSP_FIFO_OFF, SCSI_LOW_READ, 0); } /**************************************************** * scsi low interface ****************************************************/ static void nsphw_attention(sc) struct nsp_softc *sc; { bus_space_tag_t bst = sc->sc_iot; bus_space_handle_t bsh = sc->sc_ioh; u_int8_t cr; cr = nsp_cr_read_1(bst, bsh, NSPR_SCBUSCR)/* & ~SCBUSCR_ACK */; nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, cr | SCBUSCR_ATN); DELAY(10); } static void nsphw_bus_reset(sc) struct nsp_softc *sc; { bus_space_tag_t bst = sc->sc_iot; bus_space_handle_t bsh = sc->sc_ioh; int i; bus_space_write_1(bst, bsh, nsp_irqcr, IRQCR_ALLMASK); nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, SCBUSCR_RST); DELAY(100 * 1000); /* 100ms */ nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, 0); for (i = 0; i < 5; i ++) (void) nsp_cr_read_1(bst, bsh, NSPR_IRQPHS); bus_space_write_1(bst, bsh, nsp_irqcr, IRQSR_MASK); } static void nsphw_selection_done_and_expect_msgout(sc) struct nsp_softc *sc; { struct scsi_low_softc *slp = &sc->sc_sclow; bus_space_tag_t bst = sc->sc_iot; bus_space_handle_t bsh = sc->sc_ioh; /* clear ack counter */ sc->sc_cnt = 0; nsp_cr_write_1(bst, bsh, NSPR_PTCLRR, PTCLRR_PT | PTCLRR_ACK | PTCLRR_REQ | PTCLRR_HOST); /* deassert sel and assert atten */ sc->sc_seltout = 0; nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, sc->sc_busc); DELAY(1); nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, sc->sc_busc | SCBUSCR_ADIR | SCBUSCR_ACKEN); SCSI_LOW_ASSERT_ATN(slp); } static int nsphw_start_selection(sc, cb) struct nsp_softc *sc; struct slccb *cb; { struct scsi_low_softc *slp = &sc->sc_sclow; bus_space_tag_t bst = sc->sc_iot; bus_space_handle_t bsh = sc->sc_ioh; struct targ_info *ti = cb->ti; register u_int8_t arbs, ph; int s, wc; wc = sc->sc_tmaxcnt = cb->ccb_tcmax * 1000 * 1000; sc->sc_dataout_timeout = 0; /* check bus free */ s = splhigh(); ph = nsp_cr_read_1(bst, bsh, NSPR_SCBUSMON); if (ph != SCBUSMON_FREE) { splx(s); #ifdef NSP_STATICS nsp_statics.arbit_conflict_1 ++; #endif /* NSP_STATICS */ return SCSI_LOW_START_FAIL; } /* start arbitration */ nsp_cr_write_1(bst, bsh, NSPR_ARBITS, ARBITS_EXEC); splx(s); SCSI_LOW_SETUP_PHASE(ti, PH_ARBSTART); do { /* XXX: what a stupid chip! */ arbs = nsp_cr_read_1(bst, bsh, NSPR_ARBITS); DELAY(1); } while ((arbs & (ARBITS_WIN | ARBITS_FAIL)) == 0 && wc -- > 0); if ((arbs & ARBITS_WIN) == 0) { nsp_cr_write_1(bst, bsh, NSPR_ARBITS, ARBITS_CLR); #ifdef NSP_STATICS nsp_statics.arbit_conflict_2 ++; #endif /* NSP_STATICS */ return SCSI_LOW_START_FAIL; } /* assert select line */ SCSI_LOW_SETUP_PHASE(ti, PH_SELSTART); scsi_low_arbit_win(slp); s = splhigh(); DELAY(3); nsp_cr_write_1(bst, bsh, NSPR_DATA, sc->sc_idbit | (1 << ti->ti_id)); nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, SCBUSCR_SEL | SCBUSCR_BSY | sc->sc_busc); DELAY(3); nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, SCBUSCR_SEL | SCBUSCR_BSY | SCBUSCR_DOUT | sc->sc_busc); nsp_cr_write_1(bst, bsh, NSPR_ARBITS, ARBITS_CLR); DELAY(3); nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, SCBUSCR_SEL | SCBUSCR_DOUT | sc->sc_busc); DELAY(1); if ((nsp_io_control & NSP_WAIT_FOR_SELECT) != 0) { #define NSP_FIRST_SEL_WAIT 300 #define NSP_SEL_CHECK_INTERVAL 10 /* wait for a selection response */ for (wc = 0; wc < NSP_FIRST_SEL_WAIT / NSP_SEL_CHECK_INTERVAL; wc ++) { ph = nsp_cr_read_1(bst, bsh, NSPR_SCBUSMON); if ((ph & SCBUSMON_BSY) == 0) { DELAY(NSP_SEL_CHECK_INTERVAL); continue; } DELAY(1); ph = nsp_cr_read_1(bst, bsh, NSPR_SCBUSMON); if ((ph & SCBUSMON_BSY) != 0) { nsphw_selection_done_and_expect_msgout(sc); splx(s); SCSI_LOW_SETUP_PHASE(ti, PH_SELECTED); return SCSI_LOW_START_OK; } } } splx(s); /* check a selection timeout */ nsp_start_timer(sc, NSP_TIMER_1MS); sc->sc_seltout = 1; return SCSI_LOW_START_OK; } static int nsp_world_start(sc, fdone) struct nsp_softc *sc; int fdone; { struct scsi_low_softc *slp = &sc->sc_sclow; sc->sc_cnt = 0; sc->sc_seltout = 0; if ((slp->sl_cfgflags & CFG_NOATTEN) == 0) sc->sc_busc = SCBUSCR_ATN; else sc->sc_busc = 0; if ((slp->sl_cfgflags & CFG_NOPARITY) == 0) sc->sc_parr = PARITYR_ENABLE | PARITYR_CLEAR; else sc->sc_parr = 0; sc->sc_icr = (SCIENR_SCCHG | SCIENR_RESEL | SCIENR_RST); nsphw_init(sc); scsi_low_bus_reset(slp); return 0; } struct ncp_synch_data { u_int min_period; u_int max_period; u_int chip_period; u_int ack_width; }; static struct ncp_synch_data ncp_sync_data_40M[] = { {0x0c,0x0c,0x1,0}, /* 20MB 50ns*/ {0x19,0x19,0x3,1}, /* 10MB 100ns*/ {0x1a,0x25,0x5,2}, /* 7.5MB 150ns*/ {0x26,0x32,0x7,3}, /* 5MB 200ns*/ {0x0, 0, 0, 0} }; static struct ncp_synch_data ncp_sync_data_20M[] = { {0x19,0x19,0x1,0}, /* 10MB 100ns*/ {0x1a,0x25,0x2,0}, /* 7.5MB 150ns*/ {0x26,0x32,0x3,1}, /* 5MB 200ns*/ {0x0, 0, 0, 0} }; static int nsp_msg(sc, ti, msg) struct nsp_softc *sc; struct targ_info *ti; u_int msg; { bus_space_tag_t bst = sc->sc_iot; bus_space_handle_t bsh = sc->sc_ioh; struct ncp_synch_data *sdp; struct nsp_targ_info *nti = (void *) ti; u_int period, offset; int i, error; if ((msg & SCSI_LOW_MSG_WIDE) != 0) { if (ti->ti_width != SCSI_LOW_BUS_WIDTH_8) { ti->ti_width = SCSI_LOW_BUS_WIDTH_8; return EINVAL; } return 0; } if ((msg & SCSI_LOW_MSG_SYNCH) == 0) return 0; period = ti->ti_maxsynch.period; offset = ti->ti_maxsynch.offset; if (sc->sc_iclkdiv == CLKDIVR_20M) sdp = &ncp_sync_data_20M[0]; else sdp = &ncp_sync_data_40M[0]; for (i = 0; sdp->max_period != 0; i ++, sdp ++) { if (period >= sdp->min_period && period <= sdp->max_period) break; } if (period != 0 && sdp->max_period == 0) { /* * NO proper period/offset found, * Retry neg with the target. */ ti->ti_maxsynch.period = 0; ti->ti_maxsynch.offset = 0; nti->nti_reg_syncr = 0; nti->nti_reg_ackwidth = 0; error = EINVAL; } else { nti->nti_reg_syncr = (sdp->chip_period << SYNCR_PERS) | (offset & SYNCR_OFFM); nti->nti_reg_ackwidth = sdp->ack_width; error = 0; } nsp_cr_write_1(bst, bsh, NSPR_SYNCR, nti->nti_reg_syncr); nsp_cr_write_1(bst, bsh, NSPR_ACKWIDTH, nti->nti_reg_ackwidth); return error; } static int nsp_targ_init(sc, ti, action) struct nsp_softc *sc; struct targ_info *ti; int action; { struct nsp_targ_info *nti = (void *) ti; if (action == SCSI_LOW_INFO_ALLOC || action == SCSI_LOW_INFO_REVOKE) { ti->ti_width = SCSI_LOW_BUS_WIDTH_8; ti->ti_maxsynch.period = 100 / 4; ti->ti_maxsynch.offset = 15; nti->nti_reg_syncr = 0; nti->nti_reg_ackwidth = 0; } return 0; } static void nsp_start_timer(sc, time) struct nsp_softc *sc; int time; { bus_space_tag_t bst = sc->sc_iot; bus_space_handle_t bsh = sc->sc_ioh; sc->sc_timer = time; nsp_cr_write_1(bst, bsh, NSPR_TIMERCNT, time); } /************************************************************** * General probe attach **************************************************************/ int nspprobesubr(iot, ioh, dvcfg) bus_space_tag_t iot; bus_space_handle_t ioh; u_int dvcfg; { u_int8_t regv; regv = bus_space_read_1(iot, ioh, nsp_fifosr); if (regv < 0x11 || regv >= 0x20) return 0; return 1; } void nspattachsubr(sc) struct nsp_softc *sc; { struct scsi_low_softc *slp = &sc->sc_sclow; printf("\n"); sc->sc_idbit = (1 << slp->sl_hostid); slp->sl_flags |= HW_READ_PADDING; slp->sl_funcs = &nspfuncs; sc->sc_tmaxcnt = SCSI_LOW_MIN_TOUT * 1000 * 1000; /* default */ (void) scsi_low_attach(slp, 0, NSP_NTARGETS, NSP_NLUNS, sizeof(struct nsp_targ_info), 0); } /************************************************************** * PDMA functions **************************************************************/ static u_int nsp_fifo_count(sc) struct nsp_softc *sc; { bus_space_tag_t bst = sc->sc_iot; bus_space_handle_t bsh = sc->sc_ioh; u_int count; nsp_cr_write_1(bst, bsh, NSPR_PTCLRR, PTCLRR_RSS_ACK | PTCLRR_PT); count = bus_space_read_1(bst, bsh, nsp_datar); count += (((u_int) bus_space_read_1(bst, bsh, nsp_datar)) << 8); count += (((u_int) bus_space_read_1(bst, bsh, nsp_datar)) << 16); return count; } static u_int nsp_request_count(sc) struct nsp_softc *sc; { bus_space_tag_t bst = sc->sc_iot; bus_space_handle_t bsh = sc->sc_ioh; u_int count; nsp_cr_write_1(bst, bsh, NSPR_PTCLRR, PTCLRR_RSS_REQ | PTCLRR_PT); count = bus_space_read_1(bst, bsh, nsp_datar); count += (((u_int) bus_space_read_1(bst, bsh, nsp_datar)) << 8); count += (((u_int) bus_space_read_1(bst, bsh, nsp_datar)) << 16); return count; } static void nsp_setup_fifo(sc, on, direction, datalen) struct nsp_softc *sc; int on; int direction; int datalen; { u_int8_t xfermode; sc->sc_suspendio = 0; if (on == NSP_FIFO_OFF) { xfermode = XFERMR_IO8; goto out; } /* check if suspend io OK ? */ if (datalen > 0) { if (direction == SCSI_LOW_READ) { if ((nsp_io_control & NSP_READ_SUSPEND_IO) != 0 && (datalen % nsp_read_suspend_bytes) == 0) sc->sc_suspendio = nsp_read_suspend_bytes; } else { if ((nsp_io_control & NSP_WRITE_SUSPEND_IO) != 0 && (datalen % nsp_write_suspend_bytes) == 0) sc->sc_suspendio = nsp_write_suspend_bytes; } } /* determine a transfer type */ if (datalen < DEV_BSIZE || (datalen & 3) != 0) { if (sc->sc_memh != 0 && (nsp_io_control & NSP_USE_MEMIO) != 0) xfermode = XFERMR_XEN | XFERMR_MEM8; else xfermode = XFERMR_XEN | XFERMR_IO8; } else { if (sc->sc_memh != 0 && (nsp_io_control & NSP_USE_MEMIO) != 0) xfermode = XFERMR_XEN | XFERMR_MEM32; else xfermode = XFERMR_XEN | XFERMR_IO32; if (sc->sc_suspendio > 0) xfermode |= XFERMR_FIFOEN; } out: sc->sc_xfermr = xfermode; nsp_cr_write_1(sc->sc_iot, sc->sc_ioh, NSPR_XFERMR, sc->sc_xfermr); } static void nsp_pdma_end(sc, ti) struct nsp_softc *sc; struct targ_info *ti; { struct scsi_low_softc *slp = &sc->sc_sclow; struct slccb *cb = slp->sl_Qnexus; u_int len = 0, cnt; sc->sc_dataout_timeout = 0; slp->sl_flags &= ~HW_PDMASTART; nsp_setup_fifo(sc, NSP_FIFO_OFF, SCSI_LOW_READ, 0); if ((sc->sc_icr & SCIENR_FIFO) != 0) { sc->sc_icr &= ~SCIENR_FIFO; nsp_cr_write_1(sc->sc_iot, sc->sc_ioh, NSPR_SCIENR, sc->sc_icr); } if (cb == NULL) { slp->sl_error |= PDMAERR; return; } if (ti->ti_phase == PH_DATA) { cnt = nsp_fifo_count(sc); if (slp->sl_scp.scp_direction == SCSI_LOW_WRITE) { len = sc->sc_cnt - cnt; if (sc->sc_cnt >= cnt && slp->sl_scp.scp_datalen + len <= cb->ccb_scp.scp_datalen) { slp->sl_scp.scp_data -= len; slp->sl_scp.scp_datalen += len; } else { slp->sl_error |= PDMAERR; device_printf(slp->sl_dev, "len %x >= datalen %x\n", len, slp->sl_scp.scp_datalen); } } else if (slp->sl_scp.scp_direction == SCSI_LOW_READ) { if (sc->sc_cnt != cnt || sc->sc_cnt > cb->ccb_scp.scp_datalen) { slp->sl_error |= PDMAERR; device_printf(slp->sl_dev, "data read count error %x != %x (%x)\n", sc->sc_cnt, cnt, cb->ccb_scp.scp_datalen); } } sc->sc_cnt = cnt; scsi_low_data_finish(slp); } else { device_printf(slp->sl_dev, "data phase miss\n"); slp->sl_error |= PDMAERR; } } #define RFIFO_CRIT 64 #define WFIFO_CRIT 32 static void nsp_data_padding(sc, direction, count) struct nsp_softc *sc; int direction; u_int count; { bus_space_tag_t bst = sc->sc_iot; bus_space_handle_t bsh = sc->sc_ioh; if (count > NSP_MAX_DATA_SIZE) count = NSP_MAX_DATA_SIZE; nsp_cr_write_1(bst, bsh, NSPR_XFERMR, XFERMR_XEN | XFERMR_IO8); if (direction == SCSI_LOW_READ) { while (count -- > 0) (void) bus_space_read_1(bst, bsh, nsp_fifodr); } else { while (count -- > 0) (void) bus_space_write_1(bst, bsh, nsp_fifodr, 0); } nsp_cr_write_1(bst, bsh, NSPR_XFERMR, sc->sc_xfermr); } static int nsp_read_fifo(sc, suspendio) struct nsp_softc *sc; int suspendio; { struct scsi_low_softc *slp = &sc->sc_sclow; bus_space_tag_t bst = sc->sc_iot; bus_space_handle_t bsh = sc->sc_ioh; u_int res; res = nsp_fifo_count(sc); if (res == sc->sc_cnt) return 0; #ifdef NSP_DEBUG if (res < sc->sc_cnt || res == (u_int) -1) { device_printf(slp->sl_dev, "strange fifo ack count 0x%x < 0x%x\n", res, sc->sc_cnt); return 0; } #endif /* NSP_DEBUG */ res = res - sc->sc_cnt; if (res > slp->sl_scp.scp_datalen) { if ((slp->sl_error & PDMAERR) == 0) { device_printf(slp->sl_dev, "data overrun 0x%x > 0x%x\n", res, slp->sl_scp.scp_datalen); } slp->sl_error |= PDMAERR; slp->sl_scp.scp_datalen = 0; if ((slp->sl_flags & HW_READ_PADDING) == 0) { device_printf(slp->sl_dev, "read padding required\n"); return 0; } nsp_data_padding(sc, SCSI_LOW_READ, res); sc->sc_cnt += res; return 1; /* padding start */ } if (suspendio > 0 && slp->sl_scp.scp_datalen >= suspendio) res = suspendio; if ((sc->sc_xfermr & (XFERMR_MEM32 | XFERMR_MEM8)) != 0) { if ((sc->sc_xfermr & XFERMR_MEM32) != 0) { res &= ~3; bus_space_read_region_4(sc->sc_memt, sc->sc_memh, 0, (u_int32_t *) slp->sl_scp.scp_data, res >> 2); } else { bus_space_read_region_1(sc->sc_memt, sc->sc_memh, 0, (u_int8_t *) slp->sl_scp.scp_data, res); } } else { if ((sc->sc_xfermr & XFERMR_IO32) != 0) { res &= ~3; bus_space_read_multi_4(bst, bsh, nsp_fifodr, (u_int32_t *) slp->sl_scp.scp_data, res >> 2); } else { bus_space_read_multi_1(bst, bsh, nsp_fifodr, (u_int8_t *) slp->sl_scp.scp_data, res); } } if (nsp_cr_read_1(bst, bsh, NSPR_PARITYR) & PARITYR_PE) { nsp_cr_write_1(bst, bsh, NSPR_PARITYR, PARITYR_ENABLE | PARITYR_CLEAR); scsi_low_assert_msg(slp, slp->sl_Tnexus, SCSI_LOW_MSG_ERROR, 1); } slp->sl_scp.scp_data += res; slp->sl_scp.scp_datalen -= res; sc->sc_cnt += res; return 0; } static int nsp_write_fifo(sc, suspendio) struct nsp_softc *sc; int suspendio; { struct scsi_low_softc *slp = &sc->sc_sclow; bus_space_tag_t bst = sc->sc_iot; bus_space_handle_t bsh = sc->sc_ioh; u_int res; register u_int8_t stat; if (suspendio > 0) { #ifdef NSP_DEBUG if ((slp->sl_scp.scp_datalen % WFIFO_CRIT) != 0) { device_printf(slp->sl_dev, "strange write length 0x%x\n", slp->sl_scp.scp_datalen); } #endif /* NSP_DEBUG */ res = slp->sl_scp.scp_datalen % suspendio; if (res == 0) { res = suspendio; } } else { res = WFIFO_CRIT; } if (res > slp->sl_scp.scp_datalen) res = slp->sl_scp.scp_datalen; /* XXX: reconfirm! */ stat = nsp_cr_read_1(bst, bsh, NSPR_SCBUSMON) & SCBUSMON_PHMASK; if (stat != PHASE_DATAOUT) return 0; if ((sc->sc_xfermr & (XFERMR_MEM32 | XFERMR_MEM8)) != 0) { if ((sc->sc_xfermr & XFERMR_MEM32) != 0) { bus_space_write_region_4(sc->sc_memt, sc->sc_memh, 0, (u_int32_t *) slp->sl_scp.scp_data, res >> 2); } else { bus_space_write_region_1(sc->sc_memt, sc->sc_memh, 0, (u_int8_t *) slp->sl_scp.scp_data, res); } } else { if ((sc->sc_xfermr & XFERMR_IO32) != 0) { bus_space_write_multi_4(bst, bsh, nsp_fifodr, (u_int32_t *) slp->sl_scp.scp_data, res >> 2); } else { bus_space_write_multi_1(bst, bsh, nsp_fifodr, (u_int8_t *) slp->sl_scp.scp_data, res); } } slp->sl_scp.scp_datalen -= res; slp->sl_scp.scp_data += res; sc->sc_cnt += res; return 0; } static int nsp_wait_interrupt(sc) struct nsp_softc *sc; { bus_space_tag_t bst = sc->sc_iot; bus_space_handle_t bsh = sc->sc_ioh; int tout; register u_int8_t isrc; for (tout = 0; tout < DEV_BSIZE / 10; tout ++) { isrc = bus_space_read_1(bst, bsh, nsp_irqsr); if ((isrc & (IRQSR_SCSI | IRQSR_FIFO)) != 0) { if ((isrc & IRQSR_FIFO) != 0) { bus_space_write_1(bst, bsh, nsp_irqcr, IRQCR_FIFOCL); } return 1; } DELAY(1); } return 0; } static void nsp_pio_read(sc, suspendio) struct nsp_softc *sc; int suspendio; { struct scsi_low_softc *slp = &sc->sc_sclow; bus_space_tag_t bst = sc->sc_iot; bus_space_handle_t bsh = sc->sc_ioh; int tout, padding, datalen; register u_int8_t stat, fstat; padding = 0; tout = sc->sc_tmaxcnt; slp->sl_flags |= HW_PDMASTART; datalen = slp->sl_scp.scp_datalen; ReadLoop: while (1) { stat = nsp_cr_read_1(bst, bsh, NSPR_SCBUSMON); if (stat == (u_int8_t) -1) return; /* out of data phase */ if ((stat & SCBUSMON_PHMASK) != PHASE_DATAIN) { nsp_read_fifo(sc, 0); return; } /* data phase */ fstat = bus_space_read_1(bst, bsh, nsp_fifosr); if ((fstat & FIFOSR_FULLEMP) != 0) { if ((sc->sc_icr & SCIENR_FIFO) != 0) { bus_space_write_1(bst, bsh, nsp_irqcr, IRQCR_FIFOCL); } if (suspendio > 0) { padding |= nsp_read_fifo(sc, suspendio); } else { padding |= nsp_read_fifo(sc, 0); } if ((sc->sc_icr & SCIENR_FIFO) != 0) break; } else { if (padding == 0 && slp->sl_scp.scp_datalen <= 0) return; if ((sc->sc_icr & SCIENR_FIFO) != 0) break; DELAY(1); } if ((-- tout) <= 0) { device_printf(slp->sl_dev, "nsp_pio_read: timeout\n"); return; } } if (slp->sl_scp.scp_datalen > 0 && slp->sl_scp.scp_datalen > datalen - nsp_read_interrupt_bytes) { if (nsp_wait_interrupt(sc) != 0) goto ReadLoop; } } static void nsp_pio_write(sc, suspendio) struct nsp_softc *sc; int suspendio; { struct scsi_low_softc *slp = &sc->sc_sclow; bus_space_tag_t bst = sc->sc_iot; bus_space_handle_t bsh = sc->sc_ioh; u_int rcount, acount; int tout, datalen; register u_int8_t stat, fstat; tout = sc->sc_tmaxcnt; slp->sl_flags |= HW_PDMASTART; datalen = slp->sl_scp.scp_datalen; WriteLoop: while (1) { stat = nsp_cr_read_1(bst, bsh, NSPR_SCBUSMON) & SCBUSMON_PHMASK; if (stat != PHASE_DATAOUT) return; if (slp->sl_scp.scp_datalen <= 0) { if (sc->sc_dataout_timeout == 0) sc->sc_dataout_timeout = SCSI_LOW_TIMEOUT_HZ; return; } fstat = bus_space_read_1(bst, bsh, nsp_fifosr); if ((fstat & FIFOSR_FULLEMP) != 0) { if ((sc->sc_icr & SCIENR_FIFO) != 0) { bus_space_write_1(bst, bsh, nsp_irqcr, IRQCR_FIFOCL); } if (suspendio > 0) { /* XXX:IMPORTANT: * To avoid timeout of pcmcia bus * (not scsi bus!), we should check * the scsi device sends us request * signals, which means the scsi device * is ready to recieve data without * heavy delays. */ if ((slp->sl_scp.scp_datalen % suspendio) == 0) { /* Step I: * fill the nsp fifo, and waiting for * the fifo empty. */ nsp_write_fifo(sc, 0); } else { /* Step II: * check the request singals. */ acount = nsp_fifo_count(sc); rcount = nsp_request_count(sc); if (rcount <= acount) { nsp_write_fifo(sc, 0); #ifdef NSP_STATICS nsp_statics.device_busy ++; #endif /* NSP_STATICS */ } else { nsp_write_fifo(sc, suspendio); #ifdef NSP_STATICS nsp_statics.device_data_write ++; #endif /* NSP_STATICS */ } } } else { nsp_write_fifo(sc, 0); } if ((sc->sc_icr & SCIENR_FIFO) != 0) break; } else { if ((sc->sc_icr & SCIENR_FIFO) != 0) break; DELAY(1); } if ((-- tout) <= 0) { device_printf(slp->sl_dev, "nsp_pio_write: timeout\n"); return; } } if (slp->sl_scp.scp_datalen > 0 && slp->sl_scp.scp_datalen > datalen - nsp_write_interrupt_bytes) { if (nsp_wait_interrupt(sc) != 0) goto WriteLoop; } } static int nsp_negate_signal(struct nsp_softc *sc, u_int8_t mask, u_char *s) { struct scsi_low_softc *slp = &sc->sc_sclow; bus_space_tag_t bst = sc->sc_iot; bus_space_handle_t bsh = sc->sc_ioh; int wc; u_int8_t regv; for (wc = 0; wc < NSP_DELAY_MAX / NSP_DELAY_INTERVAL; wc ++) { regv = nsp_cr_read_1(bst, bsh, NSPR_SCBUSMON); if (regv == (u_int8_t) -1) return -1; if ((regv & mask) == 0) return 1; DELAY(NSP_DELAY_INTERVAL); } device_printf(slp->sl_dev, "%s nsp_negate_signal timeout\n", s); return -1; } static int nsp_xfer(sc, buf, len, phase, clear_atn) struct nsp_softc *sc; u_int8_t *buf; int len; int phase; int clear_atn; { bus_space_tag_t bst = sc->sc_iot; bus_space_handle_t bsh = sc->sc_ioh; int ptr, rv; for (ptr = 0; len > 0; len --, ptr ++) { rv = nsp_expect_signal(sc, phase, SCBUSMON_REQ); if (rv <= 0) goto out; if (len == 1 && clear_atn != 0) { nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, SCBUSCR_ADIR | SCBUSCR_ACKEN); SCSI_LOW_DEASSERT_ATN(&sc->sc_sclow); } if (phase & SCBUSMON_IO) { buf[ptr] = nsp_cr_read_1(bst, bsh, NSPR_DATAACK); } else { nsp_cr_write_1(bst, bsh, NSPR_DATAACK, buf[ptr]); } nsp_negate_signal(sc, SCBUSMON_ACK, "xfer"); } out: return len; } /************************************************************** * disconnect & reselect (HW low) **************************************************************/ static int nsp_reselected(sc) struct nsp_softc *sc; { struct scsi_low_softc *slp = &sc->sc_sclow; bus_space_tag_t bst = sc->sc_iot; bus_space_handle_t bsh = sc->sc_ioh; struct targ_info *ti; u_int sid; u_int8_t cr; sid = (u_int) nsp_cr_read_1(bst, bsh, NSPR_RESELR); sid &= ~sc->sc_idbit; sid = ffs(sid) - 1; if ((ti = scsi_low_reselected(slp, sid)) == NULL) return EJUSTRETURN; nsp_negate_signal(sc, SCBUSMON_SEL, "reselect"); cr = nsp_cr_read_1(bst, bsh, NSPR_SCBUSCR); cr &= ~(SCBUSCR_BSY | SCBUSCR_ATN); nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, cr); cr |= SCBUSCR_ADIR | SCBUSCR_ACKEN; nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, cr); #ifdef NSP_STATICS nsp_statics.reselect ++; #endif /* NSP_STATCIS */ return EJUSTRETURN; } static int nsp_disconnected(sc, ti) struct nsp_softc *sc; struct targ_info *ti; { struct scsi_low_softc *slp = &sc->sc_sclow; bus_space_tag_t bst = sc->sc_iot; bus_space_handle_t bsh = sc->sc_ioh; nsp_cr_write_1(bst, bsh, NSPR_PTCLRR, PTCLRR_PT | PTCLRR_ACK | PTCLRR_REQ | PTCLRR_HOST); if ((sc->sc_icr & SCIENR_FIFO) != 0) { sc->sc_icr &= ~SCIENR_FIFO; nsp_cr_write_1(bst, bsh, NSPR_SCIENR, sc->sc_icr); } sc->sc_cnt = 0; sc->sc_dataout_timeout = 0; #ifdef NSP_STATICS nsp_statics.disconnect ++; #endif /* NSP_STATICS */ scsi_low_disconnected(slp, ti); return 1; } /************************************************************** * SEQUENCER **************************************************************/ static void nsp_error(struct nsp_softc *, u_char *, u_int8_t, u_int8_t, u_int8_t); static void nsp_error(struct nsp_softc * sc, u_char *s, u_int8_t isrc, u_int8_t ph, u_int8_t irqphs) { struct scsi_low_softc *slp = &sc->sc_sclow; device_printf(slp->sl_dev, "%s\n", s); device_printf(slp->sl_dev, "isrc 0x%x scmon 0x%x irqphs 0x%x\n", (u_int) isrc, (u_int) ph, (u_int) irqphs); } static int nsp_target_nexus_establish(sc) struct nsp_softc *sc; { struct scsi_low_softc *slp = &sc->sc_sclow; bus_space_tag_t bst = sc->sc_iot; bus_space_handle_t bsh = sc->sc_ioh; struct targ_info *ti = slp->sl_Tnexus; struct nsp_targ_info *nti = (void *) ti; /* setup synch transfer registers */ nsp_cr_write_1(bst, bsh, NSPR_SYNCR, nti->nti_reg_syncr); nsp_cr_write_1(bst, bsh, NSPR_ACKWIDTH, nti->nti_reg_ackwidth); /* setup pdma fifo (minimum) */ nsp_setup_fifo(sc, NSP_FIFO_ON, SCSI_LOW_READ, 0); return 0; } static int nsp_lun_nexus_establish(sc) struct nsp_softc *sc; { return 0; } static int nsp_ccb_nexus_establish(sc) struct nsp_softc *sc; { struct scsi_low_softc *slp = &sc->sc_sclow; struct slccb *cb = slp->sl_Qnexus; sc->sc_tmaxcnt = cb->ccb_tcmax * 1000 * 1000; /* setup pdma fifo */ nsp_setup_fifo(sc, NSP_FIFO_ON, slp->sl_scp.scp_direction, slp->sl_scp.scp_datalen); if (slp->sl_scp.scp_direction == SCSI_LOW_READ) { if (sc->sc_suspendio > 0 && (nsp_io_control & NSP_READ_FIFO_INTERRUPTS) != 0) { sc->sc_icr |= SCIENR_FIFO; nsp_cr_write_1(sc->sc_iot, sc->sc_ioh, NSPR_SCIENR, sc->sc_icr); } } else { if (sc->sc_suspendio > 0 && (nsp_io_control & NSP_WRITE_FIFO_INTERRUPTS) != 0) { sc->sc_icr |= SCIENR_FIFO; nsp_cr_write_1(sc->sc_iot, sc->sc_ioh, NSPR_SCIENR, sc->sc_icr); } } return 0; } static int nsp_phase_match(struct nsp_softc *sc, u_int8_t phase, u_int8_t stat) { struct scsi_low_softc *slp = &sc->sc_sclow; if ((stat & SCBUSMON_PHMASK) != phase) { device_printf(slp->sl_dev, "phase mismatch 0x%x != 0x%x\n", (u_int) phase, (u_int) stat); return EINVAL; } if ((stat & SCBUSMON_REQ) == 0) return EINVAL; return 0; } int nspintr(arg) void *arg; { struct nsp_softc *sc = arg; struct scsi_low_softc *slp = &sc->sc_sclow; bus_space_tag_t bst = sc->sc_iot; bus_space_handle_t bsh = sc->sc_ioh; struct targ_info *ti; struct buf *bp; u_int derror, flags; int len, rv; u_int8_t isrc, ph, irqphs, cr, regv; /******************************************* * interrupt check *******************************************/ if (slp->sl_flags & HW_INACTIVE) return 0; bus_space_write_1(bst, bsh, nsp_irqcr, IRQCR_IRQDIS); isrc = bus_space_read_1(bst, bsh, nsp_irqsr); if (isrc == (u_int8_t) -1 || (isrc & IRQSR_MASK) == 0) { bus_space_write_1(bst, bsh, nsp_irqcr, 0); return 0; } /* XXX: IMPORTANT * Do not read an irqphs register if no scsi phase interrupt. * Unless, you should lose a scsi phase interrupt. */ ph = nsp_cr_read_1(bst, bsh, NSPR_SCBUSMON); if ((isrc & IRQSR_SCSI) != 0) { irqphs = nsp_cr_read_1(bst, bsh, NSPR_IRQPHS); } else irqphs = 0; /* * timer interrupt handler (scsi vs timer interrupts) */ if (sc->sc_timer != 0) { nsp_cr_write_1(bst, bsh, NSPR_TIMERCNT, 0); nsp_cr_write_1(bst, bsh, NSPR_TIMERCNT, 0); sc->sc_timer = 0; } /* check a timer interrupt */ regv = 0; if ((isrc & IRQSR_TIMER) != 0) { if ((isrc & IRQSR_MASK) == IRQSR_TIMER && sc->sc_seltout == 0) { bus_space_write_1(bst, bsh, nsp_irqcr, IRQCR_TIMERCL); return 1; } regv |= IRQCR_TIMERCL; } /* check a fifo interrupt */ if ((isrc & IRQSR_FIFO) != 0) { regv |= IRQCR_FIFOCL; } /* OK. enable all interrupts */ bus_space_write_1(bst, bsh, nsp_irqcr, regv); /******************************************* * debug section *******************************************/ #ifdef NSP_DEBUG if (nsp_debug) { nsp_error(sc, "current status", isrc, ph, irqphs); scsi_low_print(slp, NULL); #ifdef KDB if (nsp_debug > 1) kdb_enter(KDB_WHY_CAM, "nsp"); #endif /* KDB */ } #endif /* NSP_DEBUG */ /******************************************* * Parse hardware SCSI irq reasons register *******************************************/ if ((isrc & IRQSR_SCSI) != 0) { if ((irqphs & IRQPHS_RST) != 0) { scsi_low_restart(slp, SCSI_LOW_RESTART_SOFT, "bus reset (power off?)"); return 1; } if ((irqphs & IRQPHS_RSEL) != 0) { bus_space_write_1(bst, bsh, nsp_irqcr, IRQCR_RESCL); if (nsp_reselected(sc) == EJUSTRETURN) return 1; } if ((irqphs & (IRQPHS_PCHG | IRQPHS_LBF)) == 0) return 1; } /******************************************* * nexus check *******************************************/ if ((ti = slp->sl_Tnexus) == NULL) { /* unknown scsi phase changes */ nsp_error(sc, "unknown scsi phase changes", isrc, ph, irqphs); return 0; } /******************************************* * aribitration & selection *******************************************/ switch (ti->ti_phase) { case PH_SELSTART: if ((ph & SCBUSMON_BSY) == 0) { if (sc->sc_seltout >= NSP_SELTIMEOUT) { sc->sc_seltout = 0; nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, 0); return nsp_disconnected(sc, ti); } sc->sc_seltout ++; nsp_start_timer(sc, NSP_TIMER_1MS); return 1; } SCSI_LOW_SETUP_PHASE(ti, PH_SELECTED); nsphw_selection_done_and_expect_msgout(sc); return 1; case PH_SELECTED: if ((isrc & IRQSR_SCSI) == 0) return 1; nsp_target_nexus_establish(sc); break; case PH_RESEL: if ((isrc & IRQSR_SCSI) == 0) return 1; nsp_target_nexus_establish(sc); if ((ph & SCBUSMON_PHMASK) != PHASE_MSGIN) { device_printf(slp->sl_dev, "unexpected phase after reselect\n"); slp->sl_error |= FATALIO; scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_ABORT, 1); return 1; } break; case PH_DATA: if ((isrc & IRQSR_SCSI) != 0) break; if ((isrc & IRQSR_FIFO) != 0) { if (NSP_IS_PHASE_DATA(ph) == 0) return 1; irqphs = (ph & IRQPHS_PHMASK); break; } return 1; default: if ((isrc & IRQSR_SCSI) == 0) return 1; break; } /******************************************* * data phase control *******************************************/ if (slp->sl_flags & HW_PDMASTART) { if ((isrc & IRQSR_SCSI) != 0 && NSP_IS_IRQPHS_DATA(irqphs) == 0) { if (slp->sl_scp.scp_direction == SCSI_LOW_READ) nsp_pio_read(sc, 0); nsp_pdma_end(sc, ti); } } /******************************************* * scsi seq *******************************************/ if (slp->sl_msgphase != 0 && (irqphs & IRQPHS_LBF) != 0) return nsp_disconnected(sc, ti); /* check unexpected bus free state */ if (ph == 0) { nsp_error(sc, "unexpected bus free", isrc, ph, irqphs); return nsp_disconnected(sc, ti); } /* check normal scsi phase */ switch (irqphs & IRQPHS_PHMASK) { case IRQPHS_CMD: if (nsp_phase_match(sc, PHASE_CMD, ph) != 0) return 1; SCSI_LOW_SETUP_PHASE(ti, PH_CMD); if (scsi_low_cmd(slp, ti) != 0) { scsi_low_attention(slp); } nsp_cr_write_1(bst, bsh, NSPR_CMDCR, CMDCR_PTCLR); for (len = 0; len < slp->sl_scp.scp_cmdlen; len ++) nsp_cr_write_1(bst, bsh, NSPR_CMDDR, slp->sl_scp.scp_cmd[len]); nsp_cr_write_1(bst, bsh, NSPR_CMDCR, CMDCR_PTCLR | CMDCR_EXEC); break; case IRQPHS_DATAOUT: SCSI_LOW_SETUP_PHASE(ti, PH_DATA); if (scsi_low_data(slp, ti, &bp, SCSI_LOW_WRITE) != 0) { scsi_low_attention(slp); } nsp_pio_write(sc, sc->sc_suspendio); break; case IRQPHS_DATAIN: SCSI_LOW_SETUP_PHASE(ti, PH_DATA); if (scsi_low_data(slp, ti, &bp, SCSI_LOW_READ) != 0) { scsi_low_attention(slp); } nsp_pio_read(sc, sc->sc_suspendio); break; case IRQPHS_STATUS: if (nsp_phase_match(sc, PHASE_STATUS, ph) != 0) return 1; SCSI_LOW_SETUP_PHASE(ti, PH_STAT); regv = nsp_cr_read_1(bst, bsh, NSPR_DATA); if (nsp_cr_read_1(bst, bsh, NSPR_PARITYR) & PARITYR_PE) { nsp_cr_write_1(bst, bsh, NSPR_PARITYR, PARITYR_ENABLE | PARITYR_CLEAR); derror = SCSI_LOW_DATA_PE; } else derror = 0; /* assert ACK */ cr = SCBUSCR_ACK | nsp_cr_read_1(bst, bsh, NSPR_SCBUSCR); nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, cr); if (scsi_low_statusin(slp, ti, derror | regv) != 0) { scsi_low_attention(slp); } /* check REQ nagated */ nsp_negate_signal(sc, SCBUSMON_REQ, "statin"); /* deassert ACK */ cr = nsp_cr_read_1(bst, bsh, NSPR_SCBUSCR) & (~SCBUSCR_ACK); nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, cr); break; case IRQPHS_MSGOUT: if (nsp_phase_match(sc, PHASE_MSGOUT, ph) != 0) return 1; #ifdef NSP_MSGOUT_SERIALIZE /* * XXX: NSP QUIRK * NSP invoke interrupts only in the case of scsi phase changes, * therefore we should poll the scsi phase here to catch * the next "msg out" if exists (no scsi phase changes). */ rv = len = 16; do { SCSI_LOW_SETUP_PHASE(ti, PH_MSGOUT); flags = (ti->ti_ophase != ti->ti_phase) ? SCSI_LOW_MSGOUT_INIT : 0; len = scsi_low_msgout(slp, ti, flags); if (len > 1 && slp->sl_atten == 0) { scsi_low_attention(slp); } if (nsp_xfer(sc, ti->ti_msgoutstr, len, PHASE_MSGOUT, slp->sl_clear_atten) != 0) { slp->sl_error |= FATALIO; nsp_error(sc, "MSGOUT: xfer short", isrc, ph, irqphs); } /* catch a next signal */ rv = nsp_expect_signal(sc, PHASE_MSGOUT, SCBUSMON_REQ); } while (rv > 0 && len -- > 0); #else /* !NSP_MSGOUT_SERIALIZE */ SCSI_LOW_SETUP_PHASE(ti, PH_MSGOUT); flags = SCSI_LOW_MSGOUT_UNIFY; if (ti->ti_ophase != ti->ti_phase) flags |= SCSI_LOW_MSGOUT_INIT; len = scsi_low_msgout(slp, ti, flags); if (len > 1 && slp->sl_atten == 0) { scsi_low_attention(slp); } if (nsp_xfer(sc, ti->ti_msgoutstr, len, PHASE_MSGOUT, slp->sl_clear_atten) != 0) { nsp_error(sc, "MSGOUT: xfer short", isrc, ph, irqphs); } #endif /* !NSP_MSGOUT_SERIALIZE */ break; case IRQPHS_MSGIN: if (nsp_phase_match(sc, PHASE_MSGIN, ph) != 0) return 1; /* * XXX: NSP QUIRK * NSP invoke interrupts only in the case of scsi phase changes, * therefore we should poll the scsi phase here to catch * the next "msg in" if exists (no scsi phase changes). */ rv = len = 16; do { SCSI_LOW_SETUP_PHASE(ti, PH_MSGIN); /* read a data */ regv = nsp_cr_read_1(bst, bsh, NSPR_DATA); if (nsp_cr_read_1(bst, bsh, NSPR_PARITYR) & PARITYR_PE) { nsp_cr_write_1(bst, bsh, NSPR_PARITYR, PARITYR_ENABLE | PARITYR_CLEAR); derror = SCSI_LOW_DATA_PE; } else { derror = 0; } /* assert ack */ cr = nsp_cr_read_1(bst, bsh, NSPR_SCBUSCR) | SCBUSCR_ACK; nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, cr); if (scsi_low_msgin(slp, ti, regv | derror) == 0) { if (scsi_low_is_msgout_continue(ti, 0) != 0) { scsi_low_attention(slp); } } /* check REQ nagated */ nsp_negate_signal(sc, SCBUSMON_REQ, "msgin"); /* deassert ack */ cr = nsp_cr_read_1(bst, bsh, NSPR_SCBUSCR) & (~SCBUSCR_ACK); nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, cr); /* catch a next signal */ rv = nsp_expect_signal(sc, PHASE_MSGIN, SCBUSMON_REQ); } while (rv > 0 && len -- > 0); break; default: slp->sl_error |= FATALIO; nsp_error(sc, "unknown scsi phase", isrc, ph, irqphs); break; } return 1; #if 0 timerout: nsp_start_timer(sc, NSP_TIMER_1MS); return 0; #endif } static int nsp_timeout(sc) struct nsp_softc *sc; { struct scsi_low_softc *slp = &sc->sc_sclow; bus_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; int tout; u_int8_t ph, regv; if (slp->sl_Tnexus == NULL) return 0; ph = nsp_cr_read_1(iot, ioh, NSPR_SCBUSMON); switch (ph & SCBUSMON_PHMASK) { case PHASE_DATAOUT: if (sc->sc_dataout_timeout == 0) break; /* check a fifo empty */ regv = bus_space_read_1(iot, ioh, nsp_fifosr); if ((regv & FIFOSR_FULLEMP) == 0) break; bus_space_write_1(iot, ioh, nsp_irqcr, IRQCR_FIFOCL); /* check still requested */ ph = nsp_cr_read_1(iot, ioh, NSPR_SCBUSMON); if ((ph & SCBUSMON_REQ) == 0) break; /* check timeout */ if ((-- sc->sc_dataout_timeout) > 0) break; slp->sl_error |= PDMAERR; if ((slp->sl_flags & HW_WRITE_PADDING) == 0) { device_printf(slp->sl_dev, "write padding required\n"); break; } tout = NSP_DELAY_MAX; while (tout -- > 0) { ph = nsp_cr_read_1(iot, ioh, NSPR_SCBUSMON); if ((ph & SCBUSMON_PHMASK) != PHASE_DATAOUT) break; regv = bus_space_read_1(iot, ioh, nsp_fifosr); if ((regv & FIFOSR_FULLEMP) == 0) { DELAY(1); continue; } bus_space_write_1(iot, ioh, nsp_irqcr, IRQCR_FIFOCL); nsp_data_padding(sc, SCSI_LOW_WRITE, 32); } ph = nsp_cr_read_1(iot, ioh, NSPR_SCBUSMON); if ((ph & SCBUSMON_PHMASK) == PHASE_DATAOUT) sc->sc_dataout_timeout = SCSI_LOW_TIMEOUT_HZ; break; default: break; } return 0; }