/* $NetBSD: scsi_1185.c,v 1.17 2005/06/03 13:47:05 tsutsui Exp $ */ /* * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Sony Corp. and Kazumasa Utashiro of Software Research Associates, Inc. * * 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. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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. * * from: $Hdr: scsi_1185.c,v 4.300 91/06/09 06:22:20 root Rel41 $ SONY * * @(#)scsi_1185.c 8.1 (Berkeley) 6/11/93 */ /* * Copyright (c) 1989- by SONY Corporation. * * scsi_1185.c * * CXD1185Q * SCSI bus low level common routines * for one CPU machine * * MODIFY HISTORY: * * DMAC_WAIT --- DMAC_0266 wo tukau-baai, DMAC mata-wa SCSI-chip ni * tuzukete access suru-baai, * kanarazu wait wo ireru-beshi ! */ #include __KERNEL_RCSID(0, "$NetBSD: scsi_1185.c,v 1.17 2005/06/03 13:47:05 tsutsui Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #if defined(news3400) # include # ifndef NDMACMAP # define NDMACMAP 144 # endif #endif #define ABORT_SYNCTR_MES_FROM_TARGET #define SCSI_1185AQ #define RESET_RECOVER #define DMAC_MAP_INIT /* for nws-3700 parity error */ #define APAD_ALWAYS_ON #define CHECK_LOOP_CNT 60 #define RSL_LOOP_CNT 60 #ifndef DMAC_MAP_INIT # define MAP_OVER_ACCESS /* for nws-3700 parity error */ #endif #undef CHECK_MRQ #ifdef NOT_SUPPORT_SYNCTR # define MAX_OFFSET_BYTES 0 #else # define MAX_OFFSET_BYTES MAX_OFFSET #endif #define act_point spoint #define act_trcnt stcnt #define act_tag stag #define act_offset soffset #define splscsi splsc #if defined(__mips__) && defined(CPU_SINGLE) #define nops(x) { int __i; for (__i = 0; __i < (x); __i++) ; } #define DMAC_WAIT0 ; #else #define DMAC_WAIT0 DMAC_WAIT #endif #ifdef DMAC_MAP_INIT static int dmac_map_init = 0; #endif /* * command flag status */ #define CF_SET 1 #define CF_SEND 2 #define CF_ENOUGH 3 #define CF_EXEC 4 #define SEL_TIMEOUT_VALUE 0x7a extern struct cfdriver sc_cd; void sc_send(struct sc_scb *, int, int); int scintr(void); void scsi_hardreset(void); void scsi_chipreset(struct sc_softc *); void scsi_softreset(struct sc_softc *); int sc_busy(struct sc_softc *, int); static int WAIT_STATR_BITCLR(int); static int WAIT_STATR_BITSET(int); static void SET_CMD(struct sc_softc *, int); static void SET_CNT(int); static int GET_CNT(void); static void GET_INTR(volatile int *, volatile int *); static void sc_start(struct sc_softc *); static void sc_resel(struct sc_softc *); static void sc_discon(struct sc_softc *); static void sc_pmatch(struct sc_softc *); static void flush_fifo(struct sc_softc *); static void sc_cout(struct sc_softc *, struct sc_chan_stat *); static void sc_min(struct sc_softc *, struct sc_chan_stat *); static void sc_mout(struct sc_softc *, struct sc_chan_stat *); static void sc_sin(struct sc_softc *, volatile struct sc_chan_stat *); static void sc_dio(struct sc_softc *, volatile struct sc_chan_stat *); static void sc_dio_pad(struct sc_softc *, volatile struct sc_chan_stat *); static void print_scsi_stat(struct sc_softc *); static void append_wb(struct sc_softc *, struct sc_chan_stat *); static struct sc_chan_stat *get_wb_chan(struct sc_softc *); static int release_wb(struct sc_softc *); static void adjust_transfer(struct sc_softc *, struct sc_chan_stat *); static void clean_k2dcache(struct sc_scb *); extern void sc_done(struct sc_scb *); extern paddr_t kvtophys(vaddr_t); #if defined(__mips__) && defined(CPU_SINGLE) #define dma_reset(x) { \ int __s = splscsi(); \ dmac_gsel = (x); dmac_cctl = DM_RST; dmac_cctl = 0; \ splx(__s); \ } #endif int WAIT_STATR_BITCLR(int bitmask) { int iloop; volatile int dummy; iloop = 0; do { dummy = sc_statr; DMAC_WAIT0; if (iloop++ > CHECK_LOOP_CNT) return -1; } while (dummy & bitmask); return 0; } int WAIT_STATR_BITSET(int bitmask) { int iloop; volatile int dummy; iloop = 0; do { dummy = sc_statr; DMAC_WAIT0; if (iloop++ > CHECK_LOOP_CNT) return -1; } while ((dummy & bitmask) == 0); return 0; } void SET_CMD(struct sc_softc *sc, int CMD) { (void)WAIT_STATR_BITCLR(R0_CIP); sc->lastcmd = CMD; sc_comr = CMD; DMAC_WAIT0; } void SET_CNT(int COUNT) { sc_tclow = COUNT & 0xff; DMAC_WAIT0; sc_tcmid = (COUNT >> 8) & 0xff; DMAC_WAIT0; sc_tchi = (COUNT >> 16) & 0xff; DMAC_WAIT0; } int GET_CNT(void) { volatile int COUNT; COUNT = sc_tclow; DMAC_WAIT0; COUNT += (sc_tcmid << 8) & 0xff00; DMAC_WAIT0; COUNT += (sc_tchi << 16) & 0xff0000; DMAC_WAIT0; return COUNT; } void GET_INTR(volatile int *DATA1, volatile int *DATA2) { (void)WAIT_STATR_BITCLR(R0_CIP); while (sc_statr & R0_MIRQ) { DMAC_WAIT0; *DATA1 |= sc_intrq1; DMAC_WAIT0; *DATA2 |= sc_intrq2; DMAC_WAIT0; } } void sc_send(struct sc_scb *scb, int chan, int ie) { struct sc_softc *sc = scb->scb_softc; struct sc_chan_stat *cs; struct scsipi_xfer *xs; int i; u_char *p; cs = &sc->chan_stat[chan]; xs = scb->xs; p = (u_char *)xs->cmd; if (cs->scb != NULL) { printf("SCSI%d: sc_send() NOT NULL cs->sc\n", chan); printf("ie=0x%x scb=%p cs->sc=%p\n", ie, scb, cs->scb); printf("cdb="); for (i = 0; i < 6; i++) printf(" 0x%x", *p++); printf("\n"); panic("SCSI soft error"); /*NOTREACHED*/ } if (p[0] == SCOP_RESET && p[1] == SCOP_RESET) { /* * SCSI bus reset command procedure * (vender unique by Sony Corp.) */ #ifdef SCSI_1185AQ if (sc_idenr & 0x08) sc->scsi_1185AQ = 1; else sc->scsi_1185AQ = 0; #endif cs->scb = scb; scsi_hardreset(); scb->istatus = INST_EP; cs->scb = NULL; sc_done(scb); return; } if (scb->sc_map && (scb->sc_map->mp_pages > 0)) { /* * use map table */ scb->sc_coffset = scb->sc_map->mp_offset & PGOFSET; if (scb->sc_map->mp_pages > NSCMAP) { printf("SCSI%d: map table overflow\n", chan); scb->istatus = INST_EP|INST_LB|INST_PRE; return; } } else { /* * no use map table */ scb->sc_coffset = (u_int)scb->sc_cpoint & PGOFSET; } scb->sc_ctag = 0; cs->scb = scb; cs->comflg = OFF; cs->intr_flg = ie; cs->chan_num = chan; sc->perr_flag[chan] = 0; sc->mout_flag[chan] = 0; sc->min_cnt[chan] = 0; sc->sel_stat[chan] = SEL_WAIT; append_wb(sc, cs); sc_start(sc); } /* * SCSI start up routine */ void sc_start(struct sc_softc *sc) { struct sc_chan_stat *cs; int chan, dummy; int s; s = splscsi(); cs = get_wb_chan(sc); if ((cs == NULL) || (sc->ipc >= 0)) goto sc_start_exit; chan = cs->chan_num; if (sc->sel_stat[chan] != SEL_WAIT) { /* * already started */ goto sc_start_exit; } sc->sel_stat[chan] = SEL_START; dummy = sc_cmonr; DMAC_WAIT0; if (dummy & (R4_MBSY|R4_MSEL)) { sc->sel_stat[chan] = SEL_WAIT; goto sc_start_exit; } /* * send SELECT with ATN command */ sc->dma_stat = OFF; sc->pad_start = 0; dummy = sc_statr; DMAC_WAIT0; if (dummy & R0_CIP) { sc->sel_stat[chan] = SEL_WAIT; goto sc_start_exit; } sc_idenr = (chan << SC_TG_SHIFT) | SC_OWNID; DMAC_WAIT0; #ifdef SCSI_1185AQ if (sc->scsi_1185AQ) sc_intok1 = Ra_STO|Ra_ARBF; else sc_intok1 = Ra_STO|Ra_RSL|Ra_ARBF; #else sc_intok1 = Ra_STO|Ra_RSL|Ra_ARBF; #endif DMAC_WAIT0; /* * BUGFIX for signal reflection on BSY * !Rb_DCNT */ sc_intok2 = Rb_FNC|Rb_SRST|Rb_PHC|Rb_SPE; DMAC_WAIT0; dummy = sc_cmonr; DMAC_WAIT0; if (dummy & (R4_MBSY|R4_MSEL)) { sc->sel_stat[chan] = SEL_WAIT; goto sc_start_exit; } SET_CMD(sc, SCMD_SEL_ATN); sc_start_exit: splx(s); } /* * SCSI interrupt service routine */ int scintr(void) { int iloop; volatile int chan; volatile int dummy; struct sc_softc *sc; struct sc_chan_stat *cs; int s_int1, s_int2; sc = sc_cd.cd_devs[0]; /* XXX */ scintr_loop: #if defined(CHECK_MRQ) && defined(news3400) while (dmac_gstat & CH_MRQ(CH_SCSI)) DMAC_WAIT; #endif for (iloop = 0; iloop < 100; iloop++) { dummy = sc_statr; DMAC_WAIT; if ((dummy & R0_CIP) == 0) break; } /* * get SCSI interrupt request */ while (sc_statr & R0_MIRQ) { DMAC_WAIT0; s_int1 = sc_intrq1; DMAC_WAIT0; s_int2 = sc_intrq2; DMAC_WAIT0; sc->int_stat1 |= s_int1; sc->int_stat2 |= s_int2; } if (sc->int_stat2 & R3_SRST) { /* * RST signal is drived */ sc->int_stat2 &= ~R3_SRST; scsi_softreset(sc); goto scintr_exit; } if ((sc->ipc < 0) && (sc->wrc <= 0) && (sc->wbc <= 0)) { sc->int_stat1 = 0; sc->int_stat2 = 0; goto scintr_exit; } cs = get_wb_chan(sc); if (cs) chan = cs->chan_num; if (cs && (sc->sel_stat[chan] == SEL_START) && (sc->lastcmd == SCMD_SEL_ATN)) { /* * Check the result of SELECTION command */ if (sc->int_stat1 & R2_RSL) { /* * RESELECTION occur */ if (sc->wrc > 0) { sc->sel_stat[chan] = SEL_RSLD; } else { /* * Ghost RESELECTION ??? */ sc->int_stat1 &= ~R2_RSL; } } if (sc->int_stat1 & R2_ARBF) { /* * ARBITRATION fault */ sc->int_stat1 &= ~R2_ARBF; sc->sel_stat[chan] = SEL_ARBF; } if (sc->int_stat1 & R2_STO) { /* * SELECTION timeout */ sc->int_stat1 &= ~R2_STO; if ((sc->int_stat2&(R3_PHC|R3_RMSG)) != (R3_PHC|R3_RMSG)) { sc->ipc = chan; sc->ip = &sc->chan_stat[chan]; sc->sel_stat[chan] = SEL_TIMEOUT; sc->chan_stat[chan].scb->istatus = INST_EP|INST_TO; release_wb(sc); } } /* * SELECTION command done */ switch (sc->sel_stat[chan]) { case SEL_START: if ((sc->int_stat2 & R3_FNC) == 0) break; /* * SELECTION success */ sc_intok2 = Rb_FNC|Rb_DCNT|Rb_SRST|Rb_PHC|Rb_SPE; sc->ipc = chan; sc->ip = &sc->chan_stat[chan]; sc->ip->scb->istatus |= INST_IP; sc->dma_stat = OFF; sc->pad_start = 0; sc->sel_stat[chan] = SEL_SUCCESS; release_wb(sc); #ifndef NOT_SUPPORT_SYNCTR sc_syncr = sc->sync_tr[chan]; DMAC_WAIT0; #endif DMAC_WAIT0; break; case SEL_TIMEOUT: /* * SELECTION time out */ sc_discon(sc); goto scintr_exit; /* case SEL_RSLD: */ /* case SEL_ARBF: */ default: /* * SELECTION failed */ sc->sel_stat[chan] = SEL_WAIT; break; } if ((sc->int_stat1 & R2_RSL) == 0) sc->int_stat2 &= ~R3_FNC; } if (sc->ip != NULL) { /* * check In Process channel's request */ if (sc->dma_stat != OFF) { /* * adjust pointer & counter */ adjust_transfer(sc, sc->ip); } if (sc->int_stat2 & R3_SPE) { int volatile statr; int volatile cmonr; statr = sc_statr; DMAC_WAIT0; cmonr = sc_cmonr; sc->int_stat2 &= ~R3_SPE; sc->perr_flag[sc->ip->chan_num] = 1; } } if (sc->int_stat2 & R3_DCNT) { /* * Bus Free */ sc_discon(sc); sc->int_stat2 &= ~R3_DCNT; } if ((sc->ipc >= 0) && (sc->sel_stat[sc->ipc] == SEL_RSL_WAIT)) { sc->sel_stat[sc->ipc] = SEL_RSLD; sc->ipc = -1; sc->int_stat1 |= R2_RSL; } if (sc->int_stat1 & R2_RSL) { /* * Reselection */ sc_resel(sc); sc->int_stat1 &= ~R2_RSL; if (sc->sel_stat[sc->ipc] == SEL_RSL_WAIT) goto scintr_exit; } if ((sc->ipc >= 0) && (sc->ipc != SC_OWNID) && (sc->sel_stat[sc->ipc] == SEL_SUCCESS)) { if (sc->int_stat2 & R3_PHC) { /* * Phase change */ sc->int_stat2 &= ~(R3_PHC|R3_RMSG); sc_pmatch(sc); } else if (sc->int_stat2 & R3_RMSG) { /* * message Phase */ if (sc->min_flag > 0) { sc->int_stat2 &= ~(R3_PHC|R3_RMSG); sc_pmatch(sc); } } else if (sc->dma_stat != OFF) { dummy = sc_cmonr; DMAC_WAIT0; if ((dummy & (R4_MMSG|R4_MCD|R4_MREQ)) == R4_MREQ) { /* * still DATA transfer phase */ sc_dio_pad(sc, sc->ip); } } else if (sc->ip->comflg == CF_SEND) { dummy = sc_cmonr; DMAC_WAIT0; if ((dummy & SC_PMASK) == COM_OUT) { /* * command out phase */ sc_cout(sc, sc->ip); } } } else { if (sc->int_stat2 & (R3_PHC|R3_RMSG)) goto scintr_exit; } if ((sc->int_stat1 & (R2_STO|R2_RSL|R2_ARBF)) || (sc->int_stat2 & (R3_DCNT|R3_SRST|R3_PHC|R3_SPE))) { /* * still remain intrq */ goto scintr_loop; } scintr_exit: return 1; } /* * SCSI bus reset routine * scsi_hardreset() is occered a reset interrupt. * And call scsi_softreset(). */ void scsi_hardreset(void) { int s; #ifdef DMAC_MAP_INIT int i; #endif struct sc_softc *sc; sc = sc_cd.cd_devs[0]; /* XXX */ s = splscsi(); scsi_chipreset(sc); DMAC_WAIT0; sc->int_stat1 = 0; sc->int_stat2 = 0; SET_CMD(sc, SCMD_AST_RST); /* assert RST signal */ #ifdef DMAC_MAP_INIT if (dmac_map_init == 0) { dmac_map_init++; for (i = 0; i < NDMACMAP; i++) { # if defined(__mips__) && defined(CPU_SINGLE) dmac_gsel = CH_SCSI; dmac_ctag = (u_char)i; dmac_cmap = (u_short)0; # endif } } #endif /*cxd1185_init();*/ splx(s); } /* * I/O port (sc_ioptr) bit assign * * Rf_PRT3 - * Rf_PRT2 - * Rf_PRT1 out Floppy Disk Density control * Rf_PRT0 out Floppy Disk Eject control */ void scsi_chipreset(struct sc_softc *sc) { int s; volatile int save_ioptr; s = splscsi(); #if defined(__mips__) && defined(CPU_SINGLE) dmac_gsel = CH_SCSI; dmac_cwid = 4; /* initialize DMAC SCSI chan */ *(unsigned volatile char *)PINTEN |= DMA_INTEN; dma_reset(CH_SCSI); #endif sc_envir = 0; /* 1/4 clock */ DMAC_WAIT0; save_ioptr = sc_ioptr; DMAC_WAIT0; sc->lastcmd = SCMD_CHIP_RST; sc_comr = SCMD_CHIP_RST; /* reset chip */ DMAC_WAIT; (void)WAIT_STATR_BITCLR(R0_CIP); /* * SCMD_CHIP_RST command reset all register * except sc_statr<7:6> & sc_cmonr. * So, bit R0_MIRQ & R3_FNC will be not set. */ sc_idenr = SC_OWNID; DMAC_WAIT0; sc_intok1 = Ra_STO|Ra_RSL|Ra_ARBF; DMAC_WAIT0; sc_intok2 = Rb_FNC|Rb_SRST|Rb_PHC|Rb_SPE|Rb_RMSG; DMAC_WAIT0; sc_ioptr = save_ioptr; DMAC_WAIT; sc_moder = Rc_TMSL; /* RST drive time = 25.5 us */ DMAC_WAIT0; sc_timer = 0x2; DMAC_WAIT0; sc_moder = Rc_SPHI; /* selection timeout = 252 ms */ DMAC_WAIT0; sc_timer = SEL_TIMEOUT_VALUE; DMAC_WAIT0; #ifdef SCSI_1185AQ if (sc->scsi_1185AQ) SET_CMD(sc, SCMD_ENB_SEL); /* enable reselection */ #endif sc->int_stat1 &= ~R2_RSL; /* ignore RSL inter request */ splx(s); } void scsi_softreset(struct sc_softc *sc) { volatile struct sc_chan_stat *cs; int i; /* int (*handler)(); */ sc->wbq_actf = NULL; sc->wbq_actl = NULL; sc->wbc = 0; sc->wrc = 0; sc->ip = NULL; sc->ipc = -1; sc->dma_stat = OFF; sc->pad_start = 0; for (i = 0; i < NTARGET; ++i) { if (i == SC_OWNID) continue; cs = &sc->chan_stat[i]; cs->wb_next = NULL; #ifndef NOT_SUPPORT_SYNCTR sc->sync_tr[i] = 0; /* asynchronous mode */ #endif sc->sel_stat[i] = SEL_WAIT; if (cs->scb != NULL) { struct sc_scb *scb = cs->scb; if ((cs->scb->istatus & INST_EP) == 0) cs->scb->istatus = (INST_EP|INST_HE); cs->scb = NULL; #ifdef __mips__ clean_k2dcache(scb); #endif if (cs->intr_flg == SCSI_INTEN) { intrcnt[SCSI_INTR]++; #if 0 handler = scintsw[i].sci_inthandler; if (handler) (*handler)(scintsw[i].sci_ctlr); #endif } sc_done(scb); } } } /* * RESELECTION interrupt service routine * ( RESELECTION phase ) */ void sc_resel(struct sc_softc *sc) { struct sc_chan_stat *cs; volatile int chan; volatile int statr; int iloop; sc->min_flag = 0; chan = (sc_idenr & R6_SID_MASK) >> SC_TG_SHIFT; if (chan == SC_OWNID) return; statr = sc_statr; DMAC_WAIT0; if (statr & R0_CIP) { if (sc->lastcmd == SCMD_SEL_ATN) { /* * SELECTION command dead lock ? * save interrupt request */ while (sc_statr & R0_MIRQ) { DMAC_WAIT0; sc->int_stat1 |= sc_intrq1; DMAC_WAIT0; sc->int_stat2 |= sc_intrq2; DMAC_WAIT0; } scsi_chipreset(sc); } } cs = &sc->chan_stat[chan]; if (cs->scb == NULL) { scsi_hardreset(); return; } if ((cs->scb->istatus & INST_WR) == 0) { scsi_hardreset(); return; } if (sc->ipc >= 0) { scsi_hardreset(); return; } sc->ip = cs; sc->ipc = chan; sc_intok2 = Rb_FNC|Rb_DCNT|Rb_SRST|Rb_PHC|Rb_SPE; DMAC_WAIT0; iloop = 0; while ((sc->int_stat2 & R3_FNC) == 0) { /* * Max 6 usec wait */ if (iloop++ > RSL_LOOP_CNT) { sc->sel_stat[chan] = SEL_RSL_WAIT; return; } GET_INTR(&sc->int_stat1, &sc->int_stat2); } sc->int_stat2 &= ~R3_FNC; sc->sel_stat[chan] = SEL_SUCCESS; sc->wrc--; sc->dma_stat = OFF; sc->pad_start = 0; cs->scb->istatus |= INST_IP; cs->scb->istatus &= ~INST_WR; #ifndef NOT_SUPPORT_SYNCTR sc_syncr = sc->sync_tr[chan]; DMAC_WAIT0; #endif } /* * DISCONNECT interrupt service routine * ( Target disconnect / job done ) */ void sc_discon(struct sc_softc *sc) { volatile struct sc_chan_stat *cs; /* int (*handler)(); */ volatile int dummy; /* * Signal reflection on BSY has occurred. * Not Bus Free Phase, ignore. * * But, CXD1185Q reset INIT bit of sc_statr. * So, can't issue Transfer Information command. * * What shall we do ? Bus reset ? */ if ((sc->int_stat2 & R3_DCNT) && ((sc_intok2 & Rb_DCNT) == 0)) return; sc_intok2 = Rb_FNC|Rb_SRST|Rb_PHC|Rb_SPE; DMAC_WAIT0; sc->min_flag = 0; dummy = sc_cmonr; DMAC_WAIT0; if (dummy & R4_MATN) { SET_CMD(sc, SCMD_NGT_ATN); (void) WAIT_STATR_BITSET(R0_MIRQ); GET_INTR(&sc->int_stat1, &sc->int_stat2); /* clear interrupt */ } if ((sc->int_stat1 & R2_RSL) == 0) sc->int_stat2 &= ~R3_FNC; cs = sc->ip; if ((cs == NULL) || (sc->ipc < 0)) goto sc_discon_exit; if ((sc->sel_stat[cs->chan_num] != SEL_SUCCESS) && (sc->sel_stat[cs->chan_num] != SEL_TIMEOUT)) printf("sc_discon: eh!\n"); /* * indicate abnormal terminate */ if ((cs->scb->istatus & (INST_EP|INST_WR)) == 0) cs->scb->istatus |= (INST_EP|INST_PRE|INST_LB); cs->scb->istatus &= ~INST_IP; sc->dma_stat = OFF; sc->pad_start = 0; sc->ip = NULL; sc->ipc = -1; if ((cs->scb->istatus & INST_WR) == 0) { struct sc_scb *scb = cs->scb; if (sc->perr_flag[cs->chan_num] > 0) cs->scb->istatus |= INST_EP|INST_PRE; cs->scb = NULL; #ifdef __mips__ clean_k2dcache(scb); #endif if (cs->intr_flg == SCSI_INTEN) { intrcnt[SCSI_INTR]++; #if 0 handler = scintsw[cs->chan_num].sci_inthandler; if (handler) (*handler)(scintsw[cs->chan_num].sci_ctlr); #endif } sc_done(scb); } sc_discon_exit: sc_start(sc); } /* * SCSI phase match interrupt service routine */ void sc_pmatch(struct sc_softc *sc) { struct sc_chan_stat *cs; volatile int phase; volatile int phase2; volatile int cmonr; sc->int_stat2 &= ~R3_FNC; /* XXXXXXXX */ cs = sc->ip; if (cs == NULL) return; #if defined(__mips__) && defined(CPU_SINGLE) dma_reset(CH_SCSI); #endif phase = sc_cmonr & SC_PMASK; DMAC_WAIT0; for (;;) { phase2 = phase; cmonr = sc_cmonr; DMAC_WAIT0; phase = cmonr & SC_PMASK; if (phase == phase2) { if ((phase == DAT_IN) || (phase == DAT_OUT)) break; else if (cmonr & R4_MREQ) break; } } sc->dma_stat = OFF; sc->pad_start = 0; if (phase == COM_OUT) { sc->min_flag = 0; if (cs->comflg != CF_SEND) cs->comflg = CF_SET; sc_cout(sc, cs); } else { cs->comflg = CF_ENOUGH; sc_intok2 &= ~Rb_FNC; if (phase == MES_IN) { sc->min_flag++; sc_min(sc, cs); } else { sc->min_flag = 0; switch (phase) { case MES_OUT: sc_mout(sc, cs); break; case DAT_IN: case DAT_OUT: sc_dio(sc, cs); break; case STAT_IN: sc_sin(sc, cs); break; default: printf("SCSI%d: unknown phase\n", cs->chan_num); break; } } } } void flush_fifo(struct sc_softc *sc) { volatile int dummy; volatile int tmp; volatile int tmp0; dummy = sc_ffstr; DMAC_WAIT0; if (dummy & R5_FIFOREM) { /* * flush FIFO */ SET_CMD(sc, SCMD_FLSH_FIFO); tmp = 0; do { do { dummy = sc_statr; DMAC_WAIT0; } while (dummy & R0_CIP); GET_INTR(&tmp0, &tmp); /* clear interrupt */ } while ((tmp & R3_FNC) == 0); } } /* * SCSI command send routine */ void sc_cout(struct sc_softc *sc, struct sc_chan_stat *cs) { int iloop; int cdb_bytes; volatile int dummy; volatile int statr; struct scsipi_xfer *xs; if (cs->comflg == CF_SET) { struct sc_scb *scb = cs->scb; cs->comflg = CF_SEND; flush_fifo(sc); xs = scb->xs; cdb_bytes = xs->cmdlen; switch (xs->cmd->opcode & CMD_TYPEMASK) { case CMD_T0: case CMD_T1: case CMD_T5: break; default: cdb_bytes = 6; sc_intok2 |= Rb_FNC; break; } /* * set Active pointers */ sc->act_cmd_pointer = (char *)xs->cmd; cs->act_trcnt = scb->sc_ctrnscnt; cs->act_point = scb->sc_cpoint; cs->act_tag = scb->sc_ctag; cs->act_offset = scb->sc_coffset; } else { cdb_bytes = 1; iloop = 0; do { dummy = sc_cmonr; DMAC_WAIT0; if ((dummy & SC_PMASK) != COM_OUT) return; statr = sc_statr; DMAC_WAIT0; if (statr & R0_MIRQ) return; } while ((dummy & R4_MREQ) == 0); statr = sc_statr; DMAC_WAIT0; if (statr & R0_MIRQ) return; } SET_CNT(cdb_bytes); SET_CMD(sc, SCMD_TR_INFO|R0_TRBE); for (iloop = 0; iloop < cdb_bytes; iloop++) { do { dummy = sc_cmonr; DMAC_WAIT0; if ((dummy & SC_PMASK) != COM_OUT) return; } while ((dummy & R4_MREQ) == 0); statr = sc_statr; DMAC_WAIT0; if (statr & R0_MIRQ) return; sc_datr = *sc->act_cmd_pointer++; do { dummy = sc_cmonr; DMAC_WAIT0; } while ((dummy & R4_MACK) != 0); } } #define GET_MIN_COUNT 127 /* * SCSI message accept routine */ void sc_min(struct sc_softc *sc, struct sc_chan_stat *cs) { struct sc_scb *scb = cs->scb; struct scsipi_xfer *xs = scb->xs; volatile int dummy; sc_intok2 = Rb_FNC|Rb_DCNT|Rb_SRST|Rb_PHC|Rb_SPE|Rb_RMSG; DMAC_WAIT0; if (sc->min_flag == 1) flush_fifo(sc); dummy = sc_cmonr; DMAC_WAIT0; if ((dummy & R4_MREQ) == 0) { printf("sc_min: !REQ cmonr=%x\n", dummy); print_scsi_stat(sc); scsi_hardreset(); return; } /* retry_cmd_issue: */ sc->int_stat2 &= ~R3_FNC; SET_CMD(sc, SCMD_TR_INFO); do { do { dummy = sc_statr; DMAC_WAIT0; } while (dummy & R0_CIP); GET_INTR(&sc->int_stat1, &sc->int_stat2); /* clear interrupt */ } while ((sc->int_stat2 & R3_FNC) == 0); sc->int_stat2 &= ~R3_FNC; dummy = sc_ffstr; if (dummy & R5_FIE) { DMAC_WAIT; dummy = sc_ffstr; DMAC_WAIT0; if (dummy & R5_FIE) { dummy = sc_statr; DMAC_WAIT0; if ((dummy & R0_INIT) == 0) { /* * CXD1185 detect BSY false */ scsi_hardreset(); return; } } } dummy = sc_datr; /* get message byte */ DMAC_WAIT0; if (sc->min_cnt[cs->chan_num] == 0) { scb->message = scb->identify; if (dummy == MSG_EXTND) { /* Extended Message */ sc->min_cnt[cs->chan_num] = GET_MIN_COUNT; sc->min_point[cs->chan_num] = scb->msgbuf; bzero(scb->msgbuf, 8); *sc->min_point[cs->chan_num]++ = dummy; } else { switch ((dummy & MSG_IDENT)? MSG_IDENT : dummy) { case MSG_CCOMP: scb->istatus |= INST_EP; break; case MSG_MREJ: #ifndef NOT_SUPPORT_SYNCTR if (sc->mout_flag[cs->chan_num] == MOUT_SYNC_TR) sc->sync_tr[cs->chan_num] = 0; #endif break; case MSG_IDENT: case MSG_RDP: sc->dma_stat = OFF; sc->pad_start = 0; cs->comflg = OFF; /* * restore the saved value to Active pointers */ sc->act_cmd_pointer = (char *)xs->cmd; cs->act_trcnt = scb->sc_ctrnscnt; cs->act_point = scb->sc_cpoint; cs->act_tag = scb->sc_ctag; cs->act_offset = scb->sc_coffset; break; case MSG_SDP: /* * save Active pointers */ scb->sc_ctrnscnt = cs->act_trcnt; scb->sc_ctag = cs->act_tag; scb->sc_coffset = cs->act_offset; scb->sc_cpoint = cs->act_point; break; case MSG_DCNT: scb->istatus |= INST_WR; sc->wrc++; break; default: scb->message = MSG_MREJ; SET_CMD(sc, SCMD_AST_ATN); printf("SCSI%d:sc_min() Unknown mes=0x%x, \n", cs->chan_num, dummy); } } } else { *sc->min_point[cs->chan_num]++ = dummy; if (sc->min_cnt[cs->chan_num] == GET_MIN_COUNT) sc->min_cnt[cs->chan_num] = dummy; else sc->min_cnt[cs->chan_num]--; if (sc->min_cnt[cs->chan_num] <= 0) { #ifdef ABORT_SYNCTR_MES_FROM_TARGET if ((scb->msgbuf[2] == 0x01) && (sc->mout_flag[cs->chan_num] == MOUT_SYNC_TR)) { #else if (scb->msgbuf[2] == 0x01) { #endif int i; /* * receive Synchronous transfer message reply * calculate transfer period val * tpm * 4/1000 us = 4/16 * (tpv + 1) */ #define TPM2TPV(tpm) (((tpm)*16 + 999) / 1000 - 1) #ifndef NOT_SUPPORT_SYNCTR i = scb->msgbuf[3]; /* get tpm */ i = TPM2TPV(i) << 4; if (scb->msgbuf[4] == 0) sc->sync_tr[cs->chan_num] = 0; else sc->sync_tr[cs->chan_num] = i | scb->msgbuf[4]; #endif /* !NOT_SUPPORT_SYNCTR */ } else { scb->message = MSG_MREJ; SET_CMD(sc, SCMD_AST_ATN); /* assert ATN */ } } } SET_CMD(sc, SCMD_NGT_ACK); } /* * SCSI message send routine */ void sc_mout(struct sc_softc *sc, struct sc_chan_stat *cs) { struct sc_scb *scb = cs->scb; u_char *mp; int cnt; int iloop; volatile int dummy; volatile int tmp; volatile int tmp0; flush_fifo(sc); if (sc->mout_flag[cs->chan_num] == 0) { sc->mout_flag[cs->chan_num] = MOUT_IDENTIFY; if (scb->message != 0) { sc_intok2 = Rb_FNC|Rb_DCNT|Rb_SRST|Rb_PHC|Rb_SPE|Rb_RMSG; DMAC_WAIT0; if ((scb->message == MSG_EXTND) && (scb->msgbuf[2] == 0x01)) { cnt = 5; mp = scb->msgbuf; scb->msgbuf[3] = MIN_TP; if (scb->msgbuf[4] > MAX_OFFSET_BYTES) scb->msgbuf[4] = MAX_OFFSET_BYTES; sc->mout_flag[cs->chan_num] = MOUT_SYNC_TR; } else { cnt = 1; mp = &scb->message; } SET_CNT(cnt); SET_CMD(sc, SCMD_TR_INFO|R0_TRBE); sc_datr = scb->identify; DMAC_WAIT0; for (iloop = 1; iloop < cnt; iloop++) { sc_datr = *mp++; DMAC_WAIT; } do { dummy = sc_cmonr; DMAC_WAIT0; if ((dummy & R4_MBSY) == 0) return; dummy = sc_statr; DMAC_WAIT0; } while (dummy & R0_CIP); tmp = 0; GET_INTR(&tmp0, &tmp); /* clear interrupt */ if ((tmp & R3_FNC) == 0) { (void) WAIT_STATR_BITSET(R0_MIRQ); GET_INTR(&tmp0, &tmp); /* clear interrupt */ } do { dummy = sc_cmonr; DMAC_WAIT0; if ((dummy & R4_MBSY) == 0) return; } while ((dummy & R4_MREQ) == 0); SET_CMD(sc, SCMD_NGT_ATN); (void)WAIT_STATR_BITCLR(R0_CIP); GET_INTR(&tmp0, &tmp); /* clear interrupt */ dummy = sc_cmonr; DMAC_WAIT0; if ((dummy & R4_MREQ) == 0) { printf("sc_mout: !REQ cmonr=%x\n", dummy); print_scsi_stat(sc); scsi_hardreset(); return; } SET_CMD(sc, SCMD_TR_INFO); sc_datr = *mp++; DMAC_WAIT0; } else { dummy = sc_cmonr; DMAC_WAIT0; if (dummy & R4_MATN) { SET_CMD(sc, SCMD_NGT_ATN); (void) WAIT_STATR_BITCLR(R0_CIP); GET_INTR(&tmp0, &tmp); /* clear interrupt */ } iloop = 0; do { dummy = sc_cmonr; DMAC_WAIT0; if (iloop++ > CHECK_LOOP_CNT) break; } while ((dummy & R4_MREQ) == 0); SET_CMD(sc, SCMD_TR_INFO); sc_datr = scb->identify; DMAC_WAIT0; } } else { dummy = sc_cmonr; DMAC_WAIT0; if (dummy & R4_MATN) { SET_CMD(sc, SCMD_NGT_ATN); (void) WAIT_STATR_BITCLR(R0_CIP); GET_INTR(&tmp0, &tmp); /* clear interrupt */ } dummy = sc_cmonr; DMAC_WAIT0; if ((dummy & R4_MREQ) == 0) { printf("sc_mout: !REQ cmonr=%x\n", dummy); print_scsi_stat(sc); scsi_hardreset(); return; } SET_CMD(sc, SCMD_TR_INFO); sc_datr = scb->message; DMAC_WAIT0; } } /* * SCSI status accept routine */ void sc_sin(struct sc_softc *sc, volatile struct sc_chan_stat *cs) { volatile int dummy; int iloop; flush_fifo(sc); dummy = sc_cmonr; DMAC_WAIT0; if ((dummy & R4_MREQ) == 0) { printf("sc_sin: !REQ cmonr=%x\n", dummy); print_scsi_stat(sc); scsi_hardreset(); return; } sc_intok2 = Rb_FNC|Rb_DCNT|Rb_SRST|Rb_PHC|Rb_SPE|Rb_RMSG; DMAC_WAIT0; SET_CMD(sc, SCMD_TR_INFO); (void)WAIT_STATR_BITCLR(R0_CIP); sc->int_stat2 &= ~R3_FNC; iloop = 0; do { if (iloop++ > CHECK_LOOP_CNT) break; GET_INTR(&sc->int_stat1, &sc->int_stat2); /* clear interrupt */ } while ((sc->int_stat2 & R3_FNC) == 0); sc->int_stat2 &= ~R3_FNC; cs->scb->tstatus = sc_datr; /* get status byte */ DMAC_WAIT0; } /* * SCSI data in/out routine */ void sc_dio(struct sc_softc *sc, volatile struct sc_chan_stat *cs) { volatile struct sc_scb *scb; int i; int pages; u_int tag; u_int pfn; volatile int phase; struct scsipi_xfer *xs; scb = cs->scb; xs = scb->xs; sc_intok2 = Rb_FNC|Rb_DCNT|Rb_SRST|Rb_PHC|Rb_SPE; DMAC_WAIT0; if (cs->act_trcnt <= 0) { sc_dio_pad(sc, cs); return; } switch (xs->cmd->opcode) { case SCOP_READ: case SCOP_WRITE: case SCOP_EREAD: case SCOP_EWRITE: i = (cs->act_trcnt + DEV_BSIZE -1) / DEV_BSIZE; i *= DEV_BSIZE; break; default: i = cs->act_trcnt; break; } SET_CNT(i); sc->pad_cnt[cs->chan_num] = i - cs->act_trcnt; phase = sc_cmonr & SC_PMASK; DMAC_WAIT0; if (phase == DAT_IN) { if (sc_syncr == OFF) { DMAC_WAIT0; flush_fifo(sc); } } #if defined(__mips__) && defined(CPU_SINGLE) SET_CMD(sc, SCMD_TR_INFO|R0_DMA|R0_TRBE); #endif #if defined(__mips__) && defined(CPU_SINGLE) dmac_gsel = CH_SCSI; dmac_ctrcl = (u_char)(cs->act_trcnt & 0xff); dmac_ctrcm = (u_char)((cs->act_trcnt >> 8) & 0xff); dmac_ctrch = (u_char)((cs->act_trcnt >> 16) & 0x0f); dmac_cofsh = (u_char)((cs->act_offset >> 8) & 0xf); dmac_cofsl = (u_char)(cs->act_offset & 0xff); #endif tag = 0; if (scb->sc_map && (scb->sc_map->mp_pages > 0)) { /* * Set DMAC map entry from map table */ pages = scb->sc_map->mp_pages; for (i = cs->act_tag; i < pages; i++) { if ((pfn = scb->sc_map->mp_addr[i]) == 0) panic("SCSI:sc_dma() zero entry"); #if defined(__mips__) && defined(CPU_SINGLE) dmac_gsel = CH_SCSI; dmac_ctag = (u_char)tag++; dmac_cmap = (u_short)pfn; #endif } #ifdef MAP_OVER_ACCESS # if defined(__mips__) && defined(CPU_SINGLE) dmac_gsel = CH_SCSI; dmac_ctag = (u_char)tag++; dmac_cmap = (u_short)pfn; # endif #endif } else { /* * Set DMAC map entry from logical address */ pfn = kvtophys((vaddr_t)cs->act_point) >> PGSHIFT; pages = (cs->act_trcnt >> PGSHIFT) + 2; for (i = 0; i < pages; i++) { #if defined(__mips__) && defined(CPU_SINGLE) dmac_gsel = CH_SCSI; dmac_ctag = (u_char)tag++; dmac_cmap = (u_short)pfn + i; #endif } } #if defined(__mips__) && defined(CPU_SINGLE) dmac_gsel = CH_SCSI; dmac_ctag = 0; #endif if (phase == DAT_IN) { sc->dma_stat = SC_DMAC_RD; #if defined(__mips__) && defined(CPU_SINGLE) /* * auto pad flag is always on */ dmac_gsel = CH_SCSI; dmac_cctl = DM_MODE|DM_APAD; DMAC_WAIT; dmac_cctl = DM_MODE|DM_APAD|DM_ENABLE; DMAC_WAIT0; #endif } else if (phase == DAT_OUT) { sc->dma_stat = SC_DMAC_WR; #if defined(__mips__) && defined(CPU_SINGLE) dmac_gsel = CH_SCSI; dmac_cctl = DM_APAD; DMAC_WAIT; dmac_cctl = DM_APAD|DM_ENABLE; DMAC_WAIT0; #endif /* DMAC start on mem->I/O */ } } #define MAX_TR_CNT24 ((1 << 24) -1) void sc_dio_pad(struct sc_softc *sc, volatile struct sc_chan_stat *cs) { int dummy; if (cs->act_trcnt >= 0) return; sc->pad_start = 1; SET_CNT(MAX_TR_CNT24); SET_CMD(sc, SCMD_TR_PAD|R0_TRBE); dummy = sc_cmonr & SC_PMASK; DMAC_WAIT0; if (dummy == DAT_IN) dummy = sc_datr; /* get data */ else sc_datr = 0; /* send data */ } void print_scsi_stat(struct sc_softc *sc) { printf("ipc=%d wrc=%d wbc=%d\n", sc->ipc, sc->wrc, sc->wbc); } /* * return 0 if it was done. Or retun TRUE if it is busy. */ int sc_busy(struct sc_softc *sc, int chan) { return (int)sc->chan_stat[chan].scb; } /* * append channel into Waiting Bus_free queue */ void append_wb(struct sc_softc *sc, struct sc_chan_stat *cs) { int s; s = splclock(); /* inhibit process switch */ if (sc->wbq_actf == NULL) sc->wbq_actf = cs; else sc->wbq_actl->wb_next = cs; sc->wbq_actl = cs; cs->scb->istatus = INST_WAIT; sc->wbc++; splx(s); } /* * get channel from Waiting Bus_free queue */ struct sc_chan_stat * get_wb_chan(struct sc_softc *sc) { struct sc_chan_stat *cs; int s; s = splclock(); /* inhibit process switch */ cs = sc->wbq_actf; if (cs && cs->chan_num == SC_OWNID) /* needed? */ cs = NULL; splx(s); return cs; } /* * release channel from Waiting Bus_free queue */ int release_wb(struct sc_softc *sc) { struct sc_chan_stat *cs; int error = 0; int s; s = splclock(); /* inhibit process switch */ if (sc->wbq_actf == NULL) { error = -1; } else { cs = sc->wbq_actf; sc->wbq_actf = cs->wb_next; cs->wb_next = NULL; if (sc->wbq_actl == cs) sc->wbq_actl = NULL; cs->scb->istatus &= ~INST_WAIT; sc->wbc--; } splx(s); return error; } void adjust_transfer(struct sc_softc *sc, struct sc_chan_stat *cs) { struct sc_scb *scb = cs->scb; u_int remain_cnt; u_int offset, sent_byte; if (sc->pad_start) { sc->pad_start = 0; remain_cnt = 0; } else { # if defined(__mips__) && defined(CPU_SINGLE) remain_cnt = GET_CNT(); remain_cnt -= sc->pad_cnt[cs->chan_num]; if (sc->dma_stat == SC_DMAC_WR) { /* * adjust counter in the FIFO */ remain_cnt += sc_ffstr & R5_FIFOREM; } # endif } sent_byte = scb->sc_ctrnscnt - remain_cnt; cs->act_trcnt = remain_cnt; offset = scb->sc_coffset + sent_byte; cs->act_tag += (offset >> PGSHIFT); cs->act_offset = offset & PGOFSET; if ((scb->sc_map == NULL) || (scb->sc_map->mp_pages <= 0)) cs->act_point += sent_byte; } #ifdef __mips__ static void clean_k2dcache(struct sc_scb *scb) { struct sc_map *sc_map = scb->sc_map; paddr_t pa; int i, pages; pa = kvtophys((vaddr_t)scb->msgbuf); mips_dcache_wbinv_range_index(MIPS_PHYS_TO_KSEG0(pa), sizeof(scb->msgbuf)); if (MACH_IS_USPACE(scb->sc_cpoint)) panic("clean_k2dcache: user address is not supported"); if (MACH_IS_CACHED(scb->sc_cpoint)) { mips_dcache_wbinv_range_index((vaddr_t)scb->sc_cpoint, scb->sc_ctrnscnt); return; } if (sc_map) { pages = sc_map->mp_pages; for (i = 0; i < pages; i++) { pa = sc_map->mp_addr[i] << PGSHIFT; mips_dcache_wbinv_range_index(MIPS_PHYS_TO_KSEG0(pa), PAGE_SIZE); } } } #endif