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wdsc.c revision 1.26
      1  1.26     bjh21 /*	$NetBSD: wdsc.c,v 1.26 2009/01/25 15:23:42 bjh21 Exp $	*/
      2   1.1       wdk 
      3   1.1       wdk /*
      4   1.1       wdk  * Copyright (c) 2001 Wayne Knowles
      5   1.1       wdk  * All rights reserved.
      6   1.1       wdk  *
      7   1.1       wdk  * This code is derived from software contributed to The NetBSD Foundation
      8   1.1       wdk  * by Wayne Knowles
      9   1.1       wdk  *
     10   1.1       wdk  * Redistribution and use in source and binary forms, with or without
     11   1.1       wdk  * modification, are permitted provided that the following conditions
     12   1.1       wdk  * are met:
     13   1.1       wdk  * 1. Redistributions of source code must retain the above copyright
     14   1.1       wdk  *    notice, this list of conditions and the following disclaimer.
     15   1.1       wdk  * 2. Redistributions in binary form must reproduce the above copyright
     16   1.1       wdk  *    notice, this list of conditions and the following disclaimer in the
     17   1.1       wdk  *    documentation and/or other materials provided with the distribution.
     18  1.25    martin  * 3. All advertising materials mentioning features or use of this software
     19  1.25    martin  *    must display the following acknowledgement:
     20  1.25    martin  *        This product includes software developed by the NetBSD
     21  1.25    martin  *        Foundation, Inc. and its contributors.
     22  1.25    martin  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  1.25    martin  *    contributors may be used to endorse or promote products derived
     24  1.25    martin  *    from this software without specific prior written permission.
     25   1.1       wdk  *
     26   1.1       wdk  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27   1.1       wdk  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28   1.1       wdk  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29   1.1       wdk  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30   1.1       wdk  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31   1.1       wdk  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32   1.1       wdk  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33   1.1       wdk  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34   1.1       wdk  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35   1.1       wdk  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36   1.1       wdk  * POSSIBILITY OF SUCH DAMAGE.
     37   1.1       wdk  */
     38  1.11     lukem 
     39  1.11     lukem #include <sys/cdefs.h>
     40  1.26     bjh21 __KERNEL_RCSID(0, "$NetBSD: wdsc.c,v 1.26 2009/01/25 15:23:42 bjh21 Exp $");
     41   1.1       wdk 
     42   1.1       wdk #include <sys/param.h>
     43   1.1       wdk #include <sys/systm.h>
     44   1.1       wdk #include <sys/kernel.h>
     45   1.1       wdk #include <sys/device.h>
     46   1.1       wdk #include <sys/buf.h>
     47   1.1       wdk 
     48   1.1       wdk #include <dev/scsipi/scsi_all.h>
     49   1.1       wdk #include <dev/scsipi/scsipi_all.h>
     50   1.1       wdk #include <dev/scsipi/scsiconf.h>
     51   1.1       wdk 
     52   1.1       wdk #include <machine/cpu.h>
     53   1.1       wdk #include <machine/bus.h>
     54   1.1       wdk #include <machine/autoconf.h>
     55  1.18    rumble #include <machine/machtype.h>
     56  1.19    rumble #include <machine/sysconf.h>
     57   1.1       wdk 
     58   1.1       wdk #include <sgimips/hpc/hpcvar.h>
     59   1.1       wdk #include <sgimips/hpc/hpcreg.h>
     60   1.1       wdk #include <sgimips/hpc/hpcdma.h>
     61   1.1       wdk 
     62  1.16     bjh21 #include <dev/ic/wd33c93reg.h>
     63  1.16     bjh21 #include <dev/ic/wd33c93var.h>
     64   1.1       wdk 
     65   1.2       wdk #include <opt_kgdb.h>
     66   1.2       wdk #include <sys/kgdb.h>
     67   1.2       wdk 
     68   1.1       wdk struct wdsc_softc {
     69   1.6   thorpej 	struct wd33c93_softc	sc_wd33c93; /* Must be first */
     70   1.7    simonb 	struct evcnt		sc_intrcnt; /* Interrupt counter */
     71   1.2       wdk 	bus_dma_tag_t		sc_dmat;
     72   1.2       wdk 	bus_dmamap_t		sc_dmamap;
     73   1.2       wdk 	int			sc_flags;
     74   1.2       wdk #define	WDSC_DMA_ACTIVE			0x1
     75   1.7    simonb #define	WDSC_DMA_MAPLOADED		0x2
     76   1.1       wdk 	struct hpc_dma_softc	sc_hpcdma;
     77   1.1       wdk };
     78   1.1       wdk 
     79   1.1       wdk 
     80  1.14    sekiya void	wdsc_attach	(struct device *, struct device *, void *);
     81  1.14    sekiya int	wdsc_match	(struct device *, struct cfdata *, void *);
     82   1.1       wdk 
     83  1.26     bjh21 CFATTACH_DECL_NEW(wdsc, sizeof(struct wdsc_softc),
     84  1.10   thorpej     wdsc_match, wdsc_attach, NULL, NULL);
     85   1.1       wdk 
     86  1.20  christos int	wdsc_dmasetup	(struct wd33c93_softc *, void **,size_t *,
     87  1.14    sekiya 				int, size_t *);
     88  1.14    sekiya int	wdsc_dmago	(struct wd33c93_softc *);
     89  1.14    sekiya void	wdsc_dmastop	(struct wd33c93_softc *);
     90  1.14    sekiya void	wdsc_reset	(struct wd33c93_softc *);
     91  1.14    sekiya int	wdsc_dmaintr	(void *);
     92  1.14    sekiya int	wdsc_scsiintr	(void *);
     93   1.1       wdk 
     94   1.1       wdk /*
     95  1.19    rumble  * Match for SCSI devices on the onboard and GIO32 adapter WD33C93 chips
     96   1.1       wdk  */
     97   1.1       wdk int
     98  1.14    sekiya wdsc_match(struct device *pdp, struct cfdata *cf, void *auxp)
     99   1.1       wdk {
    100   1.2       wdk 	struct hpc_attach_args *haa = auxp;
    101   1.1       wdk 
    102  1.19    rumble 	if (strcmp(haa->ha_name, cf->cf_name) == 0) {
    103  1.19    rumble 		uint32_t reset, asr, reg;
    104  1.19    rumble 
    105  1.19    rumble 		reset = MIPS_PHYS_TO_KSEG1(haa->ha_sh + haa->ha_dmaoff +
    106  1.19    rumble 		    haa->hpc_regs->scsi0_ctl);
    107  1.19    rumble 		asr = MIPS_PHYS_TO_KSEG1(haa->ha_sh + haa->ha_devoff);
    108  1.19    rumble 
    109  1.19    rumble 		/* XXX: hpc1 offset due to SGIMIPS_BUS_SPACE_HPC brain damage */
    110  1.19    rumble 		asr = (asr + 3) & ~0x3;
    111  1.19    rumble 
    112  1.19    rumble 		if (platform.badaddr((void *)reset, sizeof(reset)))
    113  1.19    rumble 			return (0);
    114  1.19    rumble 
    115  1.19    rumble 		*(volatile uint32_t *)reset = haa->hpc_regs->scsi_dmactl_reset;
    116  1.19    rumble 		delay(1000);
    117  1.19    rumble 		*(volatile uint32_t *)reset = 0x0;
    118  1.19    rumble 
    119  1.19    rumble 		if (platform.badaddr((void *)asr, sizeof(asr)))
    120  1.19    rumble 			return (0);
    121  1.19    rumble 
    122  1.19    rumble 		reg = *(volatile uint32_t *)asr;
    123  1.19    rumble 		if (haa->hpc_regs->revision == 3) {
    124  1.19    rumble 			if ((reg & 0xff) == SBIC_ASR_INT)
    125  1.19    rumble 				return (1);
    126  1.19    rumble 		} else {
    127  1.19    rumble 			if (((reg >> 8) & 0xff) == SBIC_ASR_INT)
    128  1.19    rumble 				return (1);
    129  1.19    rumble 		}
    130  1.19    rumble 	}
    131   1.4   thorpej 
    132   1.4   thorpej 	return (0);
    133   1.1       wdk }
    134   1.1       wdk 
    135   1.1       wdk /*
    136   1.1       wdk  * Attach the wdsc driver
    137   1.1       wdk  */
    138   1.1       wdk void
    139  1.14    sekiya wdsc_attach(struct device *pdp, struct device *dp, void *auxp)
    140   1.1       wdk {
    141  1.26     bjh21 	struct wdsc_softc *wsc = device_private(dp);
    142  1.26     bjh21 	struct wd33c93_softc *sc = &wsc->sc_wd33c93;
    143   1.2       wdk 	struct hpc_attach_args *haa = auxp;
    144   1.2       wdk 	int err;
    145   1.1       wdk 
    146  1.26     bjh21 	sc->sc_dev = dp;
    147   1.4   thorpej 	sc->sc_regt = haa->ha_st;
    148   1.2       wdk 	wsc->sc_dmat = haa->ha_dmat;
    149   1.1       wdk 
    150  1.12    sekiya 	wsc->sc_hpcdma.hpc = haa->hpc_regs;
    151  1.12    sekiya 
    152   1.4   thorpej 	if ((err = bus_space_subregion(haa->ha_st, haa->ha_sh,
    153   1.4   thorpej 					haa->ha_devoff,
    154  1.12    sekiya 					wsc->sc_hpcdma.hpc->scsi0_devregs_size,
    155   1.7    simonb 					&sc->sc_regh)) != 0) {
    156   1.2       wdk 		printf(": unable to map regs, err=%d\n", err);
    157   1.2       wdk 		return;
    158   1.2       wdk 	}
    159   1.1       wdk 
    160  1.13    sekiya 	if (bus_dmamap_create(wsc->sc_dmat,
    161  1.13    sekiya 			      wsc->sc_hpcdma.hpc->scsi_max_xfer,
    162  1.12    sekiya 			      wsc->sc_hpcdma.hpc->scsi_dma_segs,
    163  1.12    sekiya 			      wsc->sc_hpcdma.hpc->scsi_dma_segs_size,
    164  1.12    sekiya 			      wsc->sc_hpcdma.hpc->scsi_dma_segs_size,
    165   1.1       wdk 			      BUS_DMA_WAITOK,
    166   1.2       wdk 			      &wsc->sc_dmamap) != 0) {
    167   1.1       wdk 		printf(": failed to create dmamap\n");
    168   1.2       wdk 		return;
    169   1.2       wdk 	}
    170   1.1       wdk 
    171   1.2       wdk 	sc->sc_dmasetup = wdsc_dmasetup;
    172   1.2       wdk 	sc->sc_dmago    = wdsc_dmago;
    173   1.2       wdk 	sc->sc_dmastop  = wdsc_dmastop;
    174   1.3   thorpej 	sc->sc_reset	= wdsc_reset;
    175   1.1       wdk 
    176   1.6   thorpej 	sc->sc_adapter.adapt_request = wd33c93_scsi_request;
    177   1.2       wdk 	sc->sc_adapter.adapt_minphys = minphys;
    178   1.1       wdk 
    179  1.12    sekiya 	sc->sc_id = 0;					/* Host ID = 0 */
    180  1.21    rumble 	sc->sc_clkfreq = 200;				/* 20MHz */
    181  1.22    rumble 	sc->sc_dmamode = SBIC_CTL_BURST_DMA;
    182   1.1       wdk 
    183   1.2       wdk 	evcnt_attach_dynamic(&wsc->sc_intrcnt, EVCNT_TYPE_INTR, NULL,
    184  1.26     bjh21 	    device_xname(sc->sc_dev), "intr");
    185   1.1       wdk 
    186   1.4   thorpej 	if ((cpu_intr_establish(haa->ha_irq, IPL_BIO,
    187   1.4   thorpej 	     wdsc_scsiintr, sc)) == NULL) {
    188   1.2       wdk 		printf(": unable to establish interrupt!\n");
    189   1.2       wdk 		return;
    190   1.2       wdk 	}
    191   1.1       wdk 
    192  1.13    sekiya 	hpcdma_init(haa, &wsc->sc_hpcdma, wsc->sc_hpcdma.hpc->scsi_dma_segs);
    193   1.6   thorpej 	wd33c93_attach(sc);
    194   1.2       wdk 	return;
    195   1.1       wdk }
    196   1.1       wdk 
    197   1.1       wdk /*
    198   1.1       wdk  * Prime the hardware for a DMA transfer
    199   1.2       wdk  *
    200   1.2       wdk  * Requires splbio() interrupts to be disabled by the caller
    201   1.1       wdk  */
    202   1.1       wdk int
    203  1.20  christos wdsc_dmasetup(struct wd33c93_softc *dev, void **addr, size_t *len, int datain, size_t *dmasize)
    204   1.1       wdk {
    205   1.2       wdk 	struct wdsc_softc *wsc = (void *)dev;
    206   1.2       wdk 	struct hpc_dma_softc *dsc = &wsc->sc_hpcdma;
    207   1.7    simonb 	int count, err;
    208   1.7    simonb 	void *vaddr;
    209   1.2       wdk 
    210   1.2       wdk 	KASSERT((wsc->sc_flags & WDSC_DMA_ACTIVE) == 0);
    211   1.2       wdk 
    212   1.2       wdk 	vaddr = *addr;
    213   1.2       wdk 	count = dsc->sc_dlen = *len;
    214   1.2       wdk 	if (count) {
    215   1.2       wdk 		KASSERT((wsc->sc_flags & WDSC_DMA_MAPLOADED) == 0);
    216   1.1       wdk 
    217   1.2       wdk 		/* Build list of physical addresses for this transfer */
    218   1.2       wdk 		if ((err=bus_dmamap_load(wsc->sc_dmat, wsc->sc_dmamap,
    219   1.1       wdk 				vaddr, count,
    220   1.7    simonb 				NULL /* kernel address */,
    221   1.1       wdk 				BUS_DMA_NOWAIT)) != 0)
    222   1.2       wdk 			panic("%s: bus_dmamap_load err=%d",
    223  1.26     bjh21 			    device_xname(dev->sc_dev), err);
    224   1.2       wdk 
    225   1.2       wdk 		hpcdma_sglist_create(dsc, wsc->sc_dmamap);
    226   1.2       wdk 		wsc->sc_flags |= WDSC_DMA_MAPLOADED;
    227   1.2       wdk 
    228   1.2       wdk 		if (datain) {
    229  1.18    rumble 			dsc->sc_dmacmd =
    230  1.18    rumble 			    wsc->sc_hpcdma.hpc->scsi_dma_datain_cmd;
    231   1.2       wdk 			dsc->sc_flags |= HPCDMA_READ;
    232   1.2       wdk 		} else {
    233  1.18    rumble 			dsc->sc_dmacmd =
    234  1.18    rumble 			    wsc->sc_hpcdma.hpc->scsi_dma_dataout_cmd;
    235   1.2       wdk 			dsc->sc_flags &= ~HPCDMA_READ;
    236   1.2       wdk 		}
    237   1.2       wdk 	}
    238   1.2       wdk 	return(count);
    239   1.1       wdk }
    240   1.1       wdk 
    241   1.1       wdk /*
    242   1.1       wdk  * Prime the hardware for the next DMA transfer
    243   1.1       wdk  */
    244   1.1       wdk int
    245  1.14    sekiya wdsc_dmago(struct wd33c93_softc *dev)
    246   1.1       wdk {
    247   1.2       wdk 	struct wdsc_softc *wsc = (void *)dev;
    248   1.2       wdk 	struct hpc_dma_softc *dsc = &wsc->sc_hpcdma;
    249   1.1       wdk 
    250   1.2       wdk 	if (dsc->sc_dlen == 0)
    251   1.2       wdk 		return(0);
    252   1.1       wdk 
    253   1.2       wdk 	KASSERT((wsc->sc_flags & WDSC_DMA_ACTIVE) == 0);
    254   1.2       wdk 	KASSERT((wsc->sc_flags & WDSC_DMA_MAPLOADED));
    255   1.1       wdk 
    256   1.2       wdk 	wsc->sc_flags |= WDSC_DMA_ACTIVE;
    257   1.1       wdk 
    258   1.2       wdk 	bus_dmamap_sync(wsc->sc_dmat, wsc->sc_dmamap, 0,
    259   1.2       wdk 	    		wsc->sc_dmamap->dm_mapsize,
    260   1.2       wdk 			BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
    261   1.1       wdk 
    262   1.2       wdk 	hpcdma_cntl(dsc, dsc->sc_dmacmd);	/* Thunderbirds are go! */
    263   1.2       wdk 
    264   1.2       wdk 	return(wsc->sc_dmamap->dm_mapsize);
    265   1.1       wdk }
    266   1.1       wdk 
    267   1.1       wdk /*
    268   1.2       wdk  * Stop DMA and unload active DMA maps
    269   1.1       wdk  */
    270   1.1       wdk void
    271  1.14    sekiya wdsc_dmastop(struct wd33c93_softc *dev)
    272   1.1       wdk {
    273   1.2       wdk 	struct wdsc_softc *wsc = (void *)dev;
    274   1.2       wdk 	struct hpc_dma_softc *dsc = &wsc->sc_hpcdma;
    275   1.1       wdk 
    276   1.2       wdk 	if (wsc->sc_flags & WDSC_DMA_ACTIVE) {
    277   1.2       wdk 		if (dsc->sc_flags & HPCDMA_READ)
    278   1.2       wdk 			hpcdma_flush(dsc);
    279   1.2       wdk 		hpcdma_cntl(dsc, 0);	/* Stop DMA */
    280   1.2       wdk 		bus_dmamap_sync(wsc->sc_dmat, wsc->sc_dmamap, 0,
    281   1.2       wdk 		    wsc->sc_dmamap->dm_mapsize,
    282   1.2       wdk 		    BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
    283   1.2       wdk 	}
    284   1.2       wdk 	if (wsc->sc_flags & WDSC_DMA_MAPLOADED)
    285   1.2       wdk 		bus_dmamap_unload(wsc->sc_dmat, wsc->sc_dmamap);
    286   1.2       wdk 	wsc->sc_flags &= ~(WDSC_DMA_ACTIVE | WDSC_DMA_MAPLOADED);
    287   1.3   thorpej }
    288   1.3   thorpej 
    289   1.3   thorpej /*
    290   1.3   thorpej  * Reset the controller.
    291   1.3   thorpej  */
    292   1.3   thorpej void
    293  1.14    sekiya wdsc_reset(struct wd33c93_softc *dev)
    294   1.3   thorpej {
    295   1.3   thorpej 	struct wdsc_softc *wsc = (void *)dev;
    296   1.3   thorpej 	struct hpc_dma_softc *dsc = &wsc->sc_hpcdma;
    297   1.3   thorpej 
    298   1.3   thorpej 	hpcdma_reset(dsc);
    299   1.1       wdk }
    300   1.1       wdk 
    301   1.1       wdk /*
    302   1.2       wdk  * WD33c93 SCSI controller interrupt
    303   1.1       wdk  */
    304   1.1       wdk int
    305  1.14    sekiya wdsc_scsiintr(void *arg)
    306   1.1       wdk {
    307   1.6   thorpej 	struct wd33c93_softc *dev = arg;
    308   1.2       wdk 	struct wdsc_softc *wsc = arg;
    309   1.2       wdk 	int found;
    310   1.2       wdk 
    311   1.6   thorpej 	found = wd33c93_intr(dev);
    312   1.2       wdk 	if (found)
    313   1.2       wdk 		wsc->sc_intrcnt.ev_count++;
    314   1.2       wdk 	return(found);
    315   1.1       wdk }
    316