NetBSD/sys/dev/pci/cac_pci.c

/*	$NetBSD: cac_pci.c,v 1.7 2000/10/19 15:31:20 ad Exp $	*/

/*-
 * Copyright (c) 2000 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Andrew Doran.
 *
 * 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 the NetBSD
 *        Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
 */

/*
 * PCI front-end for cac(4) driver.
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/queue.h>

#include <machine/endian.h>
#include <machine/bus.h>

#include <dev/pci/pcidevs.h>
#include <dev/pci/pcivar.h>

#include <dev/ic/cacreg.h>
#include <dev/ic/cacvar.h>

#define	PCI_CBIO	0x10	/* Configuration base I/O address */
#define	PCI_CBMA	0x14	/* Configuration base memory address */

static void	cac_pci_attach(struct device *, struct device *, void *);
static int	cac_pci_match(struct device *, struct cfdata *, void *);

static struct	cac_ccb *cac_pci_l0_completed(struct cac_softc *);
static int	cac_pci_l0_fifo_full(struct cac_softc *);
static void	cac_pci_l0_intr_enable(struct cac_softc *, int);
static int	cac_pci_l0_intr_pending(struct cac_softc *);
static void	cac_pci_l0_submit(struct cac_softc *, struct cac_ccb *);

struct cfattach cac_pci_ca = {
	sizeof(struct cac_softc), cac_pci_match, cac_pci_attach
};

static struct cac_linkage cac_pci_l0 = {
	cac_pci_l0_completed,
	cac_pci_l0_fifo_full,
	cac_pci_l0_intr_enable,
	cac_pci_l0_intr_pending,
	cac_pci_l0_submit
};

#define	CT_IOMAP	0x01	/* Use I/O port access */
#define CT_STARTFW	0x02	/* Need to start controller firmware */

struct cac_pci_type {
	int	ct_subsysid;
	int	ct_flags;
	struct	cac_linkage *ct_linkage;
	char	*ct_typestr;
} static cac_pci_type[] = {
	{ 0x3040110e,	CT_IOMAP,	&cac_l0,	"SMART-2/E" },
	{ 0x40300e11,	0, 		&cac_l0,	"SMART-2/P" },
	{ 0x40310e11,	0, 		&cac_l0, 	"SMART-2SL" },
	{ 0x40320e11,	0, 		&cac_l0,	"Smart Array 3200" },
	{ 0x40330e11,	0, 		&cac_l0,	"Smart Array 3100ES" },
	{ 0x40340e11,	0, 		&cac_l0,	"Smart Array 221" },
	{ 0x40400e11,	CT_STARTFW, 	&cac_pci_l0,	"Integrated Array" },
	{ 0x40480e11,	CT_STARTFW,	&cac_pci_l0,	"RAID LC2" },
	{ 0x40500e11,	0,	 	&cac_pci_l0,	"Smart Array 4200" },
	{ 0x40510e11,	0, 		&cac_pci_l0,	"Smart Array 4200ES" },
	{ 0x40580e11,	0,		&cac_pci_l0,	"Smart Array 431" },
	{ 0,		0,		&cac_l0,	NULL },
};

static int
cac_pci_match(struct device *parent, struct cfdata *match, void *aux)
{
	struct pci_attach_args *pa;

	pa = (struct pci_attach_args *)aux;

	if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_COMPAQ && 
	    PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_COMPAQ_SMART2P)
		return (1);

	if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_DEC && 
	    PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_DEC_CPQ42XX)
		return (1);

	return (0);
}

static void
cac_pci_attach(struct device *parent, struct device *self, void *aux)
{
	struct pci_attach_args *pa;
	struct cac_pci_type *ct;
	struct cac_softc *sc;
	pci_chipset_tag_t pc;
	pci_intr_handle_t ih;
	const char *intrstr;
	pcireg_t csr, subsysid;
	int flags;

	sc = (struct cac_softc *)self;
	pa = (struct pci_attach_args *)aux;
	pc = pa->pa_pc;

	subsysid = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_SUBSYS_ID_REG);

	for (ct = cac_pci_type; ct->ct_subsysid != 0; ct++)
		if (subsysid == ct->ct_subsysid)
			break;

	if (((flags = ct->ct_flags) & CT_IOMAP) == 0)
		if (pci_mapreg_map(pa, PCI_CBMA, PCI_MAPREG_TYPE_MEM, 0,
		    &sc->sc_iot, &sc->sc_ioh, NULL, NULL))
		    	flags |= CT_IOMAP;

	if ((flags & CT_IOMAP) != 0)
		if (pci_mapreg_map(pa, PCI_CBIO, PCI_MAPREG_TYPE_IO, 0,
		    &sc->sc_iot, &sc->sc_ioh, NULL, NULL)) {
			printf("can't map i/o space\n");
			return;
		}

	sc->sc_dmat = pa->pa_dmat;

	/* Enable the device. */
	csr = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
	pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG,
		       csr | PCI_COMMAND_MASTER_ENABLE);

	/* Map and establish the interrupt. */
	if (pci_intr_map(pc, pa->pa_intrtag, pa->pa_intrpin,
	    pa->pa_intrline, &ih)) {
		printf("can't map interrupt\n");
		return;
	}
	intrstr = pci_intr_string(pc, ih);
	sc->sc_ih = pci_intr_establish(pc, ih, IPL_BIO, cac_intr, sc);
	if (sc->sc_ih == NULL) {
		printf("can't establish interrupt");
		if (intrstr != NULL)
			printf(" at %s", intrstr);
		printf("\n");
		return;
	}

	printf(": Compaq ");
	if (ct->ct_typestr == NULL) {
		printf("array controller\n%s: unknown subsystem ID: 0x%08x\n",
		    sc->sc_dv.dv_xname, (u_int)subsysid);
	} else
		printf("%s\n", ct->ct_typestr);

	/* Now attach to the bus-independent code. */
	sc->sc_cl = ct->ct_linkage;
	cac_init(sc, intrstr, (flags & CT_STARTFW) != 0);
}

static void
cac_pci_l0_submit(struct cac_softc *sc, struct cac_ccb *ccb)
{

	bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap, (caddr_t)ccb - sc->sc_ccbs,
	    sizeof(struct cac_ccb), BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);
	cac_outl(sc, CAC_42REG_CMD_FIFO, ccb->ccb_paddr);
}

static struct cac_ccb *
cac_pci_l0_completed(struct cac_softc *sc)
{
	struct cac_ccb *ccb;
	u_int32_t off;

	if ((off = cac_inl(sc, CAC_42REG_DONE_FIFO)) == 0xffffffffU)
		return (0);

	cac_outl(sc, CAC_42REG_DONE_FIFO, 0);	
	off = (off & ~3) - sc->sc_ccbs_paddr;
	ccb = (struct cac_ccb *)(sc->sc_ccbs + off);

	bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap, off, sizeof(struct cac_ccb),
	    BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);

	return (ccb);
}

static int
cac_pci_l0_intr_pending(struct cac_softc *sc)
{

	return (cac_inl(sc, CAC_42REG_INTR_PENDING) & 
	    cac_inl(sc, CAC_42REG_STATUS));
}

static void
cac_pci_l0_intr_enable(struct cac_softc *sc, int state)
{

	cac_outl(sc, CAC_42REG_INTR_MASK, (state ? 0 : 8));	/* XXX */
}

static int
cac_pci_l0_fifo_full(struct cac_softc *sc)
{

	return (~cac_inl(sc, CAC_42REG_CMD_FIFO));
}