xref: /src/sys/arch/amiga/pci/p5pb.c

/*	$NetBSD: p5pb.c,v 1.1 2011/08/04 17:48:51 rkujawa Exp $ */

/*-
 * Copyright (c) 2011 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Radoslaw Kujawa.
 *
 * 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.
 *
 * 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.
 */

#include <sys/types.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/extent.h>

#include <uvm/uvm_extern.h>

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

#include <m68k/bus_dma.h>
#include <amiga/dev/zbusvar.h>
#include <amiga/pci/p5pbreg.h>

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

/* Zorro IDs */
#define ZORRO_MANID_P5		8512
#define ZORRO_PRODID_BPPC	110		/* BlizzardPPC */
#define ZORRO_PRODID_CSPPC	100		/* CyberStormPPC */
#define ZORRO_PRODID_P5PB	101		/* CVPPC/BVPPC (/G-REX?) */
/* Initial resolution as configured by the firmware */
#define P5GFX_WIDTH		640
#define P5GFX_HEIGHT		480
#define P5GFX_DEPTH		8
#define P5GFX_LINEBYTES		640

struct p5pb_softc {
	device_t sc_dev;
	struct bus_space_tag pci_conf_area;
	struct bus_space_tag pci_mem_area;
	struct amiga_pci_chipset apc;
};

static int	p5pb_match(struct device *, struct cfdata *, void *);
static void	p5pb_attach(struct device *, struct device *, void *);
void		p5pb_set_props(struct p5pb_softc *sc);
pcireg_t	p5pb_pci_conf_read(pci_chipset_tag_t, pcitag_t, int);
void		p5pb_pci_conf_write(pci_chipset_tag_t, pcitag_t, int, pcireg_t);
int		p5pb_pci_bus_maxdevs(pci_chipset_tag_t pc, int busno);
int		p5pb_pci_conf_hook(pci_chipset_tag_t pct, int bus, int dev, int func, pcireg_t id);
void		p5pb_pci_attach_hook (struct device *parent, struct device *self, struct pcibus_attach_args *pba);
pcitag_t	p5pb_pci_make_tag(pci_chipset_tag_t pc, int bus, int device, int function);
void		p5pb_pci_decompose_tag(pci_chipset_tag_t pc, pcitag_t tag, int *bp, int *dp, int *fp);

CFATTACH_DECL_NEW(p5pb, sizeof(struct p5pb_softc),
    p5pb_match, p5pb_attach, NULL, NULL);


static int p5pb_present = 0;

static int
p5pb_match(device_t parent, cfdata_t cf, void *aux)
{
	struct zbus_args *zap;

	zap = aux;

	if (zap->manid != ZORRO_MANID_P5)
		return 0;

	if (zap->prodid != ZORRO_PRODID_P5PB)
		return 0;

#ifdef P5PB_DEBUG
	aprint_normal("p5pb matched by Zorro ID %d, %d\n", zap->manid,
	    zap->prodid);
#endif

	if (p5pb_present)
		return 0; /* Allow only one. */


#ifdef I_HAVE_P5PB_REALLY
	/*
	 * At least some firmware versions do not create AutoConfig entries for
	 * CyberVisionPPC/BlizzardVisionPPC (product ID 0101). There's no "nice"
	 * way to detect the PCI bus in this case. At least check for CSPPC/BPPC.
         */
	if (zap->prodid = !(ZORRO_PRODID_BPPC || ZORRO_PRODID_CSPPC)) {
		if (!p5pb_present) {
			p5pb_present = 1;
			return 100; /* XXX: This will break SCSI! */
		}
	}
#endif
	p5pb_present = 1;
	return 1;
}


static void
p5pb_attach(device_t parent, device_t self, void *aux)
{
	struct p5pb_softc *sc = device_private(self);
	struct pcibus_attach_args pba;

	pci_chipset_tag_t pc = &sc->apc;
	sc->sc_dev = self;
	aprint_normal(": Phase5 CVPPC/BVPPC PCI bridge\n");

	/* Setup bus space mappings. */
	sc->pci_conf_area.base = (bus_addr_t) zbusmap(
	    (void *) P5BUS_PCI_CONF_BASE, P5BUS_PCI_CONF_SIZE);
	sc->pci_conf_area.absm = &amiga_bus_stride_1;

	sc->pci_mem_area.base = (bus_addr_t) zbusmap(
	    (void *) P5BUS_PCI_MEM_BASE, P5BUS_PCI_MEM_SIZE);
	sc->pci_mem_area.absm = &amiga_bus_stride_1swap_abs;

#ifdef P5PB_DEBUG
	aprint_normal("p5pb mapped %x -> %x, %x -> %x\n",
	    P5BUS_PCI_CONF_BASE, sc->pci_conf_area.base,
	    P5BUS_PCI_MEM_BASE, sc->pci_mem_area.base );
#endif

	sc->apc.pci_conf_iot = &(sc->pci_conf_area);

	if (bus_space_map(sc->apc.pci_conf_iot, OFF_PCI_CONF_DATA,
	    256, 0, &sc->apc.pci_conf_ioh))
		aprint_error_dev(self,
		    "couldn't map PCI configuration data space\n");

	/* Initialize the PCI chipset tag. */
	sc->apc.pc_conf_v = (void*) pc;
	sc->apc.pc_bus_maxdevs = p5pb_pci_bus_maxdevs;
	sc->apc.pc_make_tag = p5pb_pci_make_tag;
	sc->apc.pc_decompose_tag = p5pb_pci_decompose_tag;
	sc->apc.pc_conf_read = p5pb_pci_conf_read;
	sc->apc.pc_conf_write = p5pb_pci_conf_write;
	sc->apc.pc_attach_hook = p5pb_pci_attach_hook;

	pba.pba_iot = NULL;
	pba.pba_memt = &(sc->pci_mem_area);
	pba.pba_dmat = NULL;
	pba.pba_dmat64 = NULL;
	pba.pba_pc = pc;
	pba.pba_flags = PCI_FLAGS_MEM_OKAY;
	pba.pba_bus = 0;
	pba.pba_bridgetag = NULL;

	p5pb_set_props(sc);

	config_found_ia(self, "pcibus", &pba, pcibusprint);
}

/*
 * Set properties needed to support fb driver. These are read later during
 * autoconfg in device_register().
 */
void
p5pb_set_props(struct p5pb_softc *sc)
{
	prop_dictionary_t dict;
	device_t dev;

	dev = sc->sc_dev;
	dict = device_properties(dev);

	prop_dictionary_set_uint32(dict, "width", P5GFX_WIDTH);
	prop_dictionary_set_uint32(dict, "height", P5GFX_HEIGHT);
	prop_dictionary_set_uint8(dict, "depth", P5GFX_DEPTH);
	prop_dictionary_set_uint16(dict, "linebytes", P5GFX_LINEBYTES);
	prop_dictionary_set_uint64(dict, "address", P5BUS_PCI_MEM_BASE);
#if (NGENFB > 0)
	/*
	 * Framebuffer starts at P5BUS_PCI_MEM_BASE, but genfb needs virtual
	 * address.
	 */
	prop_dictionary_set_uint64(dict, "virtual_address",
	    sc->pci_mem_area.base);
#endif
}

pcireg_t
p5pb_pci_conf_read(pci_chipset_tag_t pc, pcitag_t tag, int reg)
{
	uint32_t data;
	uint32_t bus, dev, func;

	pci_decompose_tag(pc, tag, &bus, &dev, &func);

	data = bus_space_read_4(pc->pci_conf_iot, pc->pci_conf_ioh,
	    (func<<5) + reg);
#ifdef P5PB_DEBUG
	aprint_normal("p5pb conf read va: %lx, bus: %d, dev: %d, "
	    "func: %d, reg: %d -r-> data %x\n",
	    pc->pci_conf_ioh, bus, dev, func, reg, data);
#endif
	return data;
}

void
p5pb_pci_conf_write(pci_chipset_tag_t pc, pcitag_t tag, int reg, pcireg_t val)
{
	uint32_t bus, dev, func;

	pci_decompose_tag(pc, tag, &bus, &dev, &func);

	bus_space_write_4(pc->pci_conf_iot, pc->pci_conf_ioh,
	    (func << 5) + reg, val);
#ifdef P5PB_DEBUG
	aprint_normal("p5pb conf write va: %lx, bus: %d, dev: %d, "
	    "func: %d, reg: %d -w-> data %x\n",
	    pc->pci_conf_ioh, bus, dev, func, reg, val);
#endif

}

int
p5pb_pci_bus_maxdevs(pci_chipset_tag_t pc, int busno)
{

	/* Allow only one device. Obvious in case of CVPPC/BVPPC. */
	return 1;
}

pcitag_t
p5pb_pci_make_tag(pci_chipset_tag_t pc, int bus, int device, int function)
{

	return (bus << 16) | (device << 11) | (function << 8);
}

void
p5pb_pci_decompose_tag(pci_chipset_tag_t pc, pcitag_t tag, int *bp,
    int *dp, int *fp)
{

	if (bp != NULL)
		*bp = (tag >> 16) & 0xff;
	if (dp != NULL)
		*dp = (tag >> 11) & 0x1f;
	if (fp != NULL)
		*fp = (tag >> 8) & 0x07;
}

void
p5pb_pci_attach_hook(struct device *parent, struct device *self,
    struct pcibus_attach_args *pba)
{
}