/* $NetBSD: bzsc.c,v 1.33 2003/04/01 21:26:28 thorpej Exp $ */ /* * Copyright (c) 1997 Michael L. Hitch * Copyright (c) 1995 Daniel Widenfalk * Copyright (c) 1994 Christian E. Hopps * Copyright (c) 1982, 1990 The Regents of the University of California. * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Daniel Widenfalk * and Michael L. Hitch. * 4. 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. */ #include __KERNEL_RCSID(0, "$NetBSD: bzsc.c,v 1.33 2003/04/01 21:26:28 thorpej Exp $"); /* * Initial amiga Blizzard 1230-II driver by Daniel Widenfalk. Conversion to * 53c9x MI driver by Michael L. Hitch (mhitch@montana.edu). */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include void bzscattach(struct device *, struct device *, void *); int bzscmatch(struct device *, struct cfdata *, void *); /* Linkup to the rest of the kernel */ CFATTACH_DECL(bzsc, sizeof(struct bzsc_softc), bzscmatch, bzscattach, NULL, NULL); /* * Functions and the switch for the MI code. */ u_char bzsc_read_reg(struct ncr53c9x_softc *, int); void bzsc_write_reg(struct ncr53c9x_softc *, int, u_char); int bzsc_dma_isintr(struct ncr53c9x_softc *); void bzsc_dma_reset(struct ncr53c9x_softc *); int bzsc_dma_intr(struct ncr53c9x_softc *); int bzsc_dma_setup(struct ncr53c9x_softc *, caddr_t *, size_t *, int, size_t *); void bzsc_dma_go(struct ncr53c9x_softc *); void bzsc_dma_stop(struct ncr53c9x_softc *); int bzsc_dma_isactive(struct ncr53c9x_softc *); struct ncr53c9x_glue bzsc_glue = { bzsc_read_reg, bzsc_write_reg, bzsc_dma_isintr, bzsc_dma_reset, bzsc_dma_intr, bzsc_dma_setup, bzsc_dma_go, bzsc_dma_stop, bzsc_dma_isactive, 0, }; /* Maximum DMA transfer length to reduce impact on high-speed serial input */ u_long bzsc_max_dma = 1024; extern int ser_open_speed; u_long bzsc_cnt_pio = 0; /* number of PIO transfers */ u_long bzsc_cnt_dma = 0; /* number of DMA transfers */ u_long bzsc_cnt_dma2 = 0; /* number of DMA transfers broken up */ u_long bzsc_cnt_dma3 = 0; /* number of pages combined */ #ifdef DEBUG struct { u_char hardbits; u_char status; u_char xx; u_char yy; } bzsc_trace[128]; int bzsc_trace_ptr = 0; int bzsc_trace_enable = 1; void bzsc_dump(void); #endif /* * if we are a Phase5 Blizzard 1230 II */ int bzscmatch(struct device *parent, struct cfdata *cf, void *aux) { struct zbus_args *zap; volatile u_char *regs; zap = aux; if (zap->manid != 0x2140 || zap->prodid != 11) return(0); /* It's not Blizzard 1230 */ if (!is_a1200()) return(0); /* And not A1200 */ regs = &((volatile u_char *)zap->va)[0x10000]; if (badaddr((caddr_t)regs)) return(0); regs[NCR_CFG1 * 2] = 0; regs[NCR_CFG1 * 2] = NCRCFG1_PARENB | 7; delay(5); if (regs[NCR_CFG1 * 2] != (NCRCFG1_PARENB | 7)) return(0); return(1); } /* * Attach this instance, and then all the sub-devices */ void bzscattach(struct device *parent, struct device *self, void *aux) { struct bzsc_softc *bsc = (void *)self; struct ncr53c9x_softc *sc = &bsc->sc_ncr53c9x; struct zbus_args *zap; extern u_long scsi_nosync; extern int shift_nosync; extern int ncr53c9x_debug; /* * Set up the glue for MI code early; we use some of it here. */ sc->sc_glue = &bzsc_glue; /* * Save the regs */ zap = aux; bsc->sc_reg = &((volatile u_char *)zap->va)[0x10000]; bsc->sc_dmabase = &bsc->sc_reg[0x21]; sc->sc_freq = 40; /* Clocked at 40Mhz */ printf(": address %p", bsc->sc_reg); sc->sc_id = 7; /* * It is necessary to try to load the 2nd config register here, * to find out what rev the FAS chip is, else the ncr53c9x_reset * will not set up the defaults correctly. */ sc->sc_cfg1 = sc->sc_id | NCRCFG1_PARENB; sc->sc_cfg2 = NCRCFG2_SCSI2 | NCRCFG2_FE; sc->sc_cfg3 = 0x08 /*FCLK*/ | NCRESPCFG3_FSCSI | NCRESPCFG3_CDB; sc->sc_rev = NCR_VARIANT_FAS216; /* * This is the value used to start sync negotiations * Note that the NCR register "SYNCTP" is programmed * in "clocks per byte", and has a minimum value of 4. * The SCSI period used in negotiation is one-fourth * of the time (in nanoseconds) needed to transfer one byte. * Since the chip's clock is given in MHz, we have the following * formula: 4 * period = (1000 / freq) * 4 */ sc->sc_minsync = 1000 / sc->sc_freq; /* * get flags from -I argument and set cf_flags. * NOTE: low 8 bits are to disable disconnect, and the next * 8 bits are to disable sync. */ sc->sc_dev.dv_cfdata->cf_flags |= (scsi_nosync >> shift_nosync) & 0xffff; shift_nosync += 16; /* Use next 16 bits of -I argument to set ncr53c9x_debug flags */ ncr53c9x_debug |= (scsi_nosync >> shift_nosync) & 0xffff; shift_nosync += 16; #if 1 if (((scsi_nosync >> shift_nosync) & 0xff00) == 0xff00) sc->sc_minsync = 0; #endif /* Really no limit, but since we want to fit into the TCR... */ sc->sc_maxxfer = 64 * 1024; /* * Configure interrupts. */ bsc->sc_isr.isr_intr = ncr53c9x_intr; bsc->sc_isr.isr_arg = sc; bsc->sc_isr.isr_ipl = 2; add_isr(&bsc->sc_isr); /* * Now try to attach all the sub-devices */ sc->sc_adapter.adapt_request = ncr53c9x_scsipi_request; sc->sc_adapter.adapt_minphys = minphys; ncr53c9x_attach(sc); } /* * Glue functions. */ u_char bzsc_read_reg(struct ncr53c9x_softc *sc, int reg) { struct bzsc_softc *bsc = (struct bzsc_softc *)sc; return bsc->sc_reg[reg * 2]; } void bzsc_write_reg(struct ncr53c9x_softc *sc, int reg, u_char val) { struct bzsc_softc *bsc = (struct bzsc_softc *)sc; u_char v = val; bsc->sc_reg[reg * 2] = v; #ifdef DEBUG if (bzsc_trace_enable/* && sc->sc_nexus && sc->sc_nexus->xs->xs_control & XS_CTL_POLL*/ && reg == NCR_CMD/* && bsc->sc_active*/) { bzsc_trace[(bzsc_trace_ptr - 1) & 127].yy = v; /* printf(" cmd %x", v);*/ } #endif } int bzsc_dma_isintr(struct ncr53c9x_softc *sc) { struct bzsc_softc *bsc = (struct bzsc_softc *)sc; if ((bsc->sc_reg[NCR_STAT * 2] & NCRSTAT_INT) == 0) return 0; #ifdef DEBUG if (/*sc->sc_nexus && sc->sc_nexus->xs->xs_control & XS_CTL_POLL &&*/ bzsc_trace_enable) { bzsc_trace[bzsc_trace_ptr].status = bsc->sc_reg[NCR_STAT * 2]; bzsc_trace[bzsc_trace_ptr].xx = bsc->sc_reg[NCR_CMD * 2]; bzsc_trace[bzsc_trace_ptr].yy = bsc->sc_active; bzsc_trace_ptr = (bzsc_trace_ptr + 1) & 127; } #endif return 1; } void bzsc_dma_reset(struct ncr53c9x_softc *sc) { struct bzsc_softc *bsc = (struct bzsc_softc *)sc; bsc->sc_active = 0; } int bzsc_dma_intr(struct ncr53c9x_softc *sc) { register struct bzsc_softc *bsc = (struct bzsc_softc *)sc; register int cnt; NCR_DMA(("bzsc_dma_intr: cnt %d int %x stat %x fifo %d ", bsc->sc_dmasize, sc->sc_espintr, sc->sc_espstat, bsc->sc_reg[NCR_FFLAG * 2] & NCRFIFO_FF)); if (bsc->sc_active == 0) { printf("bzsc_intr--inactive DMA\n"); return -1; } /* update sc_dmaaddr and sc_pdmalen */ cnt = bsc->sc_reg[NCR_TCL * 2]; cnt += bsc->sc_reg[NCR_TCM * 2] << 8; cnt += bsc->sc_reg[NCR_TCH * 2] << 16; if (!bsc->sc_datain) { cnt += bsc->sc_reg[NCR_FFLAG * 2] & NCRFIFO_FF; bsc->sc_reg[NCR_CMD * 2] = NCRCMD_FLUSH; } cnt = bsc->sc_dmasize - cnt; /* number of bytes transferred */ NCR_DMA(("DMA xferred %d\n", cnt)); if (bsc->sc_xfr_align) { bcopy(bsc->sc_alignbuf, *bsc->sc_dmaaddr, cnt); bsc->sc_xfr_align = 0; } *bsc->sc_dmaaddr += cnt; *bsc->sc_pdmalen -= cnt; bsc->sc_active = 0; return 0; } int bzsc_dma_setup(struct ncr53c9x_softc *sc, caddr_t *addr, size_t *len, int datain, size_t *dmasize) { struct bzsc_softc *bsc = (struct bzsc_softc *)sc; paddr_t pa; u_char *ptr; size_t xfer; bsc->sc_dmaaddr = addr; bsc->sc_pdmalen = len; bsc->sc_datain = datain; bsc->sc_dmasize = *dmasize; /* * DMA can be nasty for high-speed serial input, so limit the * size of this DMA operation if the serial port is running at * a high speed (higher than 19200 for now - should be adjusted * based on cpu type and speed?). * XXX - add serial speed check XXX */ if (ser_open_speed > 19200 && bzsc_max_dma != 0 && bsc->sc_dmasize > bzsc_max_dma) bsc->sc_dmasize = bzsc_max_dma; ptr = *addr; /* Kernel virtual address */ pa = kvtop(ptr); /* Physical address of DMA */ xfer = min(bsc->sc_dmasize, PAGE_SIZE - (pa & (PAGE_SIZE - 1))); bsc->sc_xfr_align = 0; /* * If output and unaligned, stuff odd byte into FIFO */ if (datain == 0 && (int)ptr & 1) { NCR_DMA(("bzsc_dma_setup: align byte written to fifo\n")); pa++; xfer--; /* XXXX CHECK THIS !!!! XXXX */ bsc->sc_reg[NCR_FIFO * 2] = *ptr++; } /* * If unaligned address, read unaligned bytes into alignment buffer */ else if ((int)ptr & 1) { pa = kvtop((caddr_t)&bsc->sc_alignbuf); xfer = bsc->sc_dmasize = min(xfer, sizeof (bsc->sc_alignbuf)); NCR_DMA(("bzsc_dma_setup: align read by %d bytes\n", xfer)); bsc->sc_xfr_align = 1; } ++bzsc_cnt_dma; /* number of DMA operations */ while (xfer < bsc->sc_dmasize) { if ((pa + xfer) != kvtop(*addr + xfer)) break; if ((bsc->sc_dmasize - xfer) < PAGE_SIZE) xfer = bsc->sc_dmasize; else xfer += PAGE_SIZE; ++bzsc_cnt_dma3; } if (xfer != *len) ++bzsc_cnt_dma2; bsc->sc_dmasize = xfer; *dmasize = bsc->sc_dmasize; bsc->sc_pa = pa; #if defined(M68040) || defined(M68060) if (mmutype == MMU_68040) { if (bsc->sc_xfr_align) { dma_cachectl(bsc->sc_alignbuf, sizeof(bsc->sc_alignbuf)); } else dma_cachectl(*bsc->sc_dmaaddr, bsc->sc_dmasize); } #endif pa >>= 1; if (!bsc->sc_datain) pa |= 0x80000000; bsc->sc_dmabase[0x10] = (u_int8_t)(pa >> 24); bsc->sc_dmabase[0] = (u_int8_t)(pa >> 16); bsc->sc_dmabase[0] = (u_int8_t)(pa >> 8); bsc->sc_dmabase[0] = (u_int8_t)(pa); bsc->sc_active = 1; return 0; } void bzsc_dma_go(struct ncr53c9x_softc *sc) { } void bzsc_dma_stop(struct ncr53c9x_softc *sc) { } int bzsc_dma_isactive(struct ncr53c9x_softc *sc) { struct bzsc_softc *bsc = (struct bzsc_softc *)sc; return bsc->sc_active; } #ifdef DEBUG void bzsc_dump(void) { int i; i = bzsc_trace_ptr; printf("bzsc_trace dump: ptr %x\n", bzsc_trace_ptr); do { if (bzsc_trace[i].hardbits == 0) { i = (i + 1) & 127; continue; } printf("%02x%02x%02x%02x(", bzsc_trace[i].hardbits, bzsc_trace[i].status, bzsc_trace[i].xx, bzsc_trace[i].yy); if (bzsc_trace[i].status & NCRSTAT_INT) printf("NCRINT/"); if (bzsc_trace[i].status & NCRSTAT_TC) printf("NCRTC/"); switch(bzsc_trace[i].status & NCRSTAT_PHASE) { case 0: printf("dataout"); break; case 1: printf("datain"); break; case 2: printf("cmdout"); break; case 3: printf("status"); break; case 6: printf("msgout"); break; case 7: printf("msgin"); break; default: printf("phase%d?", bzsc_trace[i].status & NCRSTAT_PHASE); } printf(") "); i = (i + 1) & 127; } while (i != bzsc_trace_ptr); printf("\n"); } #endif