siop_pci_common.c

MIPS处理器的bootloader,龙芯就是用的修改过的PMON2

/*	$OpenBSD: siop_pci_common.c,v 1.8 2001/10/26 00:06:35 krw Exp $ */
/*	$NetBSD: siop_pci_common.c,v 1.6 2001/01/10 15:50:20 thorpej Exp $	*/

/*
 * Copyright (c) 2000 Manuel Bouyer.
 *
 * 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 Manuel Bouyer
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */

/* SYM53c8xx PCI-SCSI I/O Processors driver: PCI front-end */

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

#include <machine/endian.h>

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

#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>

#include <dev/ic/siopreg.h>
#include <dev/ic/siopvar.h>
#include <dev/pci/siop_pci_common.h>

/* List (array, really :) of chips we know how to handle */
const struct siop_product_desc siop_products[] = {
	{ PCI_PRODUCT_SYMBIOS_810,
	0x00,
	SF_PCI_RL | SF_CHIP_LS,
	4, 8, 3, SF_CLOCK_2500, 0
	},
	{ PCI_PRODUCT_SYMBIOS_810,
	0x10,
	SF_PCI_RL | SF_PCI_BOF | SF_CHIP_PF | SF_CHIP_LS,
	4, 8, 3, SF_CLOCK_2500, 0
	},
	{ PCI_PRODUCT_SYMBIOS_815,
	0x00,
	SF_PCI_RL | SF_PCI_BOF,
	4, 8, 3, SF_CLOCK_2500, 0
	},
	{ PCI_PRODUCT_SYMBIOS_820,
	0x00,
	SF_PCI_RL | SF_CHIP_LS | SF_BUS_WIDE,
	4, 8, 3, SF_CLOCK_2500, 0
	},
	{ PCI_PRODUCT_SYMBIOS_825,
	0x00,
	SF_PCI_RL | SF_PCI_BOF | SF_BUS_WIDE,
	4, 8, 3, SF_CLOCK_2500, 0
	},
	{ PCI_PRODUCT_SYMBIOS_825,
	0x10,
	SF_PCI_RL | SF_PCI_CLS | SF_PCI_WRI | SF_PCI_RM |
	SF_CHIP_FIFO | SF_CHIP_PF | SF_CHIP_RAM | SF_CHIP_LS | SF_CHIP_10REGS |
	SF_BUS_WIDE,
	7, 8, 3, SF_CLOCK_2500, 4096
	},
	{ PCI_PRODUCT_SYMBIOS_860,
	0x00,
	SF_PCI_RL | SF_PCI_CLS | SF_PCI_WRI | SF_PCI_RM |
	SF_CHIP_PF | SF_CHIP_LS |
	SF_BUS_ULTRA,
	4, 8, 5, SF_CLOCK_1250, 0
	},
	{ PCI_PRODUCT_SYMBIOS_875,
	0x00,
	SF_PCI_RL | SF_PCI_CLS | SF_PCI_WRI | SF_PCI_RM |
	SF_CHIP_FIFO | SF_CHIP_PF | SF_CHIP_RAM | SF_CHIP_LS | SF_CHIP_10REGS |
	SF_BUS_ULTRA | SF_BUS_WIDE,
	7, 16, 5, SF_CLOCK_1250, 4096
	},
	{ PCI_PRODUCT_SYMBIOS_875,
	0x02,
	SF_PCI_RL | SF_PCI_CLS | SF_PCI_WRI | SF_PCI_RM |
	SF_CHIP_FIFO | SF_CHIP_PF | SF_CHIP_RAM | SF_CHIP_DBLR |
	SF_CHIP_LS | SF_CHIP_10REGS |
	SF_BUS_ULTRA | SF_BUS_WIDE,
	7, 16, 5, SF_CLOCK_1250, 4096
	},
	{ PCI_PRODUCT_SYMBIOS_875J,
	0x00,
	SF_PCI_RL | SF_PCI_CLS | SF_PCI_WRI | SF_PCI_RM |
	SF_CHIP_FIFO | SF_CHIP_PF | SF_CHIP_RAM | SF_CHIP_DBLR |
	SF_CHIP_LS | SF_CHIP_10REGS |
	SF_BUS_ULTRA | SF_BUS_WIDE,
	7, 16, 5, SF_CLOCK_1250, 4096
	},
	{ PCI_PRODUCT_SYMBIOS_885,
	0x00,
	SF_PCI_RL | SF_PCI_CLS | SF_PCI_WRI | SF_PCI_RM |
	SF_CHIP_FIFO | SF_CHIP_PF | SF_CHIP_RAM | SF_CHIP_DBLR |
	SF_CHIP_LS | SF_CHIP_10REGS |
	SF_BUS_ULTRA | SF_BUS_WIDE,
	7, 16, 5, SF_CLOCK_1250, 4096
	},
	{ PCI_PRODUCT_SYMBIOS_895,
	0x00,
	SF_PCI_RL | SF_PCI_CLS | SF_PCI_WRI | SF_PCI_RM |
	SF_CHIP_FIFO | SF_CHIP_PF | SF_CHIP_RAM | SF_CHIP_QUAD |
	SF_CHIP_LS | SF_CHIP_10REGS |
	SF_BUS_ULTRA2 | SF_BUS_WIDE,
	7, 31, 7, SF_CLOCK_625, 4096
	},
	{ PCI_PRODUCT_SYMBIOS_895A,
	0x00,
	SF_PCI_RL | SF_PCI_CLS | SF_PCI_WRI | SF_PCI_RM |
	SF_CHIP_FIFO | SF_CHIP_PF | SF_CHIP_RAM | SF_CHIP_QUAD |
	SF_CHIP_LS | SF_CHIP_10REGS |
	SF_BUS_ULTRA2 | SF_BUS_WIDE,
	7, 31, 7, SF_CLOCK_625, 8192
	},
	{ PCI_PRODUCT_SYMBIOS_896,
	0x00,
	SF_PCI_RL | SF_PCI_CLS | SF_PCI_WRI | SF_PCI_RM |
	SF_CHIP_FIFO | SF_CHIP_PF | SF_CHIP_RAM | SF_CHIP_QUAD |
	SF_CHIP_LS | SF_CHIP_10REGS |
	SF_BUS_ULTRA2 | SF_BUS_WIDE,
	7, 31, 7, SF_CLOCK_625, 8192
	},
	{ PCI_PRODUCT_SYMBIOS_1010,
	0x00,
	SF_PCI_RL | SF_PCI_CLS | SF_PCI_WRI | SF_PCI_RM |
	SF_CHIP_FIFO | SF_CHIP_PF | SF_CHIP_RAM | SF_CHIP_QUAD |
	SF_CHIP_LS | SF_CHIP_10REGS | SF_CHIP_C10 |
	SF_BUS_ULTRA2 | SF_BUS_WIDE,
	7, 62, 0, SF_CLOCK_625, 8192
	},
	{ PCI_PRODUCT_SYMBIOS_1010R,
	0x00,
	SF_PCI_RL | SF_PCI_CLS | SF_PCI_WRI | SF_PCI_RM |
	SF_CHIP_FIFO | SF_CHIP_PF | SF_CHIP_RAM | SF_CHIP_QUAD |
	SF_CHIP_LS | SF_CHIP_10REGS | SF_CHIP_C10 |
	SF_BUS_ULTRA2 | SF_BUS_WIDE,
	7, 62, 0, SF_CLOCK_625, 8192
	},
	{ PCI_PRODUCT_SYMBIOS_1510D,
	0x00,
	SF_PCI_RL | SF_PCI_CLS | SF_PCI_WRI | SF_PCI_RM |
	SF_CHIP_FIFO | SF_CHIP_PF | SF_CHIP_RAM | SF_CHIP_QUAD |
	SF_CHIP_LS | SF_CHIP_10REGS |
	SF_BUS_ULTRA2 | SF_BUS_WIDE,
	7, 31, 7, SF_CLOCK_625, 4096
	},
	{ 0,
	0x00,
	0x00,
	0, 0, 0, 0, 0
	},
};

const struct siop_product_desc *
siop_lookup_product(id, rev)
	u_int32_t id;
	int rev;
{
	const struct siop_product_desc *pp;
	const struct siop_product_desc *rp = NULL;

	if (PCI_VENDOR(id) != PCI_VENDOR_SYMBIOS)
		return NULL;

	for (pp = siop_products; pp->product != 0; pp++) {
		if (PCI_PRODUCT(id) == pp->product && pp->revision <= rev)
			if (rp == NULL || pp->revision > rp->revision)
				rp = pp;
	}
	return rp;
}

int
siop_pci_attach_common(sc, pa)
	struct siop_pci_softc *sc;
	struct pci_attach_args *pa;
{
	pci_chipset_tag_t pc = pa->pa_pc;
	pcitag_t tag = pa->pa_tag;    
	const char *intrstr;
#ifndef PMON
	pci_intr_handle_t intrhandle;
#endif
	bus_space_tag_t iot, memt;
	bus_space_handle_t ioh, memh;
	pcireg_t memtype;
	int memh_valid, ioh_valid;
	bus_addr_t ioaddr, memaddr;

	sc->sc_pp = siop_lookup_product(pa->pa_id, PCI_REVISION(pa->pa_class));
	if (sc->sc_pp == NULL) {
		printf("siop: broken match/attach!\n");
		return 0;
	}
	/* copy interesting infos about the chip */
	sc->siop.features = sc->sc_pp->features;
	sc->siop.maxburst = sc->sc_pp->maxburst;
	sc->siop.maxoff = sc->sc_pp->maxoff;
	sc->siop.clock_div = sc->sc_pp->clock_div;
	sc->siop.scf_index = sc->sc_pp->scf_index;
	sc->siop.ram_size = sc->sc_pp->ram_size;

	sc->siop.sc_reset = siop_pci_reset;
	sc->sc_pc = pc;
	sc->sc_tag = tag;
	sc->siop.sc_dmat = pa->pa_dmat;

	memtype = pci_mapreg_type(pa->pa_pc, pa->pa_tag, 0x14);
	switch (memtype) {
	case PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_32BIT:
	case PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_64BIT:
		memh_valid = (pci_mapreg_map(pa, 0x14, memtype, 0,
		    &memt, &memh, &memaddr, NULL, 0) == 0);
		break;
	default:
		memh_valid = 0;
	}

	ioh_valid = (pci_mapreg_map(pa, 0x10, PCI_MAPREG_TYPE_IO, 0,
	    &iot, &ioh, &ioaddr, NULL, 0) == 0);

	if (memh_valid) {
		sc->siop.sc_rt = memt;
		sc->siop.sc_rh = memh;
		sc->siop.sc_raddr = memaddr;
	} else if (ioh_valid) {
		sc->siop.sc_rt = iot;
		sc->siop.sc_rh = ioh;
		sc->siop.sc_raddr = ioaddr;
	} else {
		printf("\n%s: unable to map device registers\n",
		    sc->siop.sc_dev.dv_xname);
		return 0;
	}

	if (sc->siop.features & SF_CHIP_RAM) {
		int bar;
		switch (memtype) {
		case PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_32BIT:
			bar = 0x18;
			break;
		case PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_64BIT:
			bar = 0x1c;
			break;
		}
		if (pci_mapreg_map(pa, bar, memtype, 0,
                    &sc->siop.sc_ramt, &sc->siop.sc_ramh,
		    &sc->siop.sc_scriptaddr, NULL, 0) != 0)
			sc->siop.features &= ~SF_CHIP_RAM;
	}

#ifndef PMON
	if (pci_intr_map(pa, &intrhandle)) {
		printf("\n%s: couldn't map interrupt\n",
		    sc->siop.sc_dev.dv_xname);
		return 0;
	}
#endif
	intrstr = pci_intr_string(pa->pa_pc, intrhandle);
	sc->sc_ih = pci_intr_establish(pa->pa_pc, intrhandle, IPL_BIO,
	    siop_intr, &sc->siop, sc->siop.sc_dev.dv_xname);
	if (sc->sc_ih == NULL) {
		printf("\n%s: couldn't establish interrupt",
		    sc->siop.sc_dev.dv_xname);
		if (intrstr != NULL)
			printf(" at %s", intrstr);
		printf("\n");
		return 0;
	}

	printf(": %s", (intrstr != NULL) ? intrstr : "irq ?");
	if (sc->siop.features & SF_CHIP_RAM)
		printf(", has RAM");
	printf("\n");

	return 1;
}

void
siop_pci_reset(sc)
	struct siop_softc *sc;
{
	int dmode;

	dmode = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_DMODE);
	if (sc->features & SF_PCI_RL)
		dmode |= DMODE_ERL;
	if (sc->features & SF_PCI_RM)
		dmode |= DMODE_ERMP;
	if (sc->features & SF_PCI_BOF)
		dmode |= DMODE_BOF;
	if (sc->features & SF_PCI_CLS)
		bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_DCNTL,
		    bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_DCNTL) |
		    DCNTL_CLSE);
	if (sc->features & SF_PCI_WRI)
		bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_CTEST3,
		    bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_CTEST3) |
		    CTEST3_WRIE);
	if (sc->maxburst) {
		int ctest5 = bus_space_read_1(sc->sc_rt, sc->sc_rh,
		    SIOP_CTEST5);
		bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_CTEST4,
		    bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_CTEST4) &
		    ~CTEST4_BDIS);
		dmode &= ~DMODE_BL_MASK;
		dmode |= ((sc->maxburst - 1) << DMODE_BL_SHIFT) & DMODE_BL_MASK;
		ctest5 &= ~CTEST5_BBCK;
		ctest5 |= (sc->maxburst - 1) & CTEST5_BBCK;
		bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_CTEST5, ctest5);
	} else if ((sc->features & SF_CHIP_C10) == 0) {
		bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_CTEST4,
		    bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_CTEST4) |
		    CTEST4_BDIS);
	}
	bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_DMODE, dmode);
}