NetBSD/sys/arch/hpcmips/tx/txcsbus.c

/*	$NetBSD: txcsbus.c,v 1.2 1999/12/03 18:15:41 uch Exp $ */

/*
 * Copyright (c) 1999, by UCHIYAMA Yasushi
 * 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. The name of the developer 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 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 AUTHOR 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 "opt_tx39_debug.h"

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

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

#include <machine/platid.h>
#include <machine/platid_mask.h>

#include <hpcmips/tx/tx39var.h>
#include <hpcmips/tx/txcsbusvar.h>
#include <hpcmips/tx/tx39biuvar.h>
#include <hpcmips/tx/tx39biureg.h>

#include "locators.h"

int	txcsbus_match __P((struct device*, struct cfdata*, void*));
void	txcsbus_attach __P((struct device*, struct device*, void*));
int	txcsbus_print __P((void*, const char*));
int	txcsbus_search __P((struct device*, struct cfdata*, void*));

struct txcsbus_softc {
	struct	device sc_dev;
	tx_chipset_tag_t sc_tc;
	/* chip select space tag */
	bus_space_tag_t sc_cst[TX39_MAXCS];
};

struct cfattach txcsbus_ca = {
	sizeof(struct txcsbus_softc), txcsbus_match, txcsbus_attach
};

bus_space_tag_t __txcsbus_alloc_cstag __P((struct txcsbus_softc*, 
					   struct cs_handle*));

int
txcsbus_match(parent, cf, aux)
	struct device *parent;
	struct cfdata *cf;
	void *aux;
{
	struct csbus_attach_args *cba = aux;
	platid_mask_t mask;

	if (strcmp(cba->cba_busname, cf->cf_driver->cd_name)) {
		return 0;
	}

	if (cf->cf_loc[TXCSBUSIFCF_PLATFORM] == 
	    TXCSBUSIFCF_PLATFORM_DEFAULT) {
		return 1;
	}

	mask = PLATID_DEREF(cf->cf_loc[TXCSBUSIFCF_PLATFORM]);
	if (platid_match(&platid, &mask)) {
		return 2;
	}

	return 0;
}

void
txcsbus_attach(parent, self, aux)
	struct device *parent;
	struct device *self;
	void *aux;
{
	struct csbus_attach_args *cba = aux;
	struct txcsbus_softc *sc = (void*)self;

	sc->sc_tc = cba->cba_tc;
	printf("\n");

	/*
	 *	Attach external chip.
	 */
	config_search(txcsbus_search, self, txcsbus_print);
}

int
txcsbus_print(aux, pnp)
	void *aux;
	const char *pnp;
{
	return pnp ? QUIET : UNCONF;
}

int
txcsbus_search(parent, cf, aux)
	struct device *parent;
	struct cfdata *cf;
	void *aux;
{
	struct txcsbus_softc *sc = (void*)parent;
	struct cs_attach_args ca;
	
	ca.ca_tc		= sc->sc_tc;

	ca.ca_csreg.cs		= cf->cf_loc[TXCSBUSCF_REGCS];
	ca.ca_csreg.csbase	= cf->cf_loc[TXCSBUSCF_REGCSBASE];
	ca.ca_csreg.cssize	= cf->cf_loc[TXCSBUSCF_REGCSSIZE];
	ca.ca_csreg.cswidth	= cf->cf_loc[TXCSBUSCF_REGCSWIDTH];

	if (ca.ca_csreg.cs != TXCSBUSCF_REGCS_DEFAULT) {
		ca.ca_csreg.cstag = __txcsbus_alloc_cstag(sc, &ca.ca_csreg);
	}

	ca.ca_csio.cs		= cf->cf_loc[TXCSBUSCF_IOCS];
	ca.ca_csio.csbase	= cf->cf_loc[TXCSBUSCF_IOCSBASE];
	ca.ca_csio.cssize	= cf->cf_loc[TXCSBUSCF_IOCSSIZE];
	ca.ca_csio.cswidth	= cf->cf_loc[TXCSBUSCF_IOCSWIDTH];

	if (ca.ca_csio.cs != TXCSBUSCF_IOCS_DEFAULT) {
		ca.ca_csio.cstag = __txcsbus_alloc_cstag(sc, &ca.ca_csio);
	}

	ca.ca_csmem.cs		= cf->cf_loc[TXCSBUSCF_MEMCS];
	ca.ca_csmem.csbase	= cf->cf_loc[TXCSBUSCF_MEMCSBASE];
	ca.ca_csmem.cssize	= cf->cf_loc[TXCSBUSCF_MEMCSSIZE];
	ca.ca_csmem.cswidth	= cf->cf_loc[TXCSBUSCF_MEMCSWIDTH];

	if (ca.ca_csmem.cs != TXCSBUSCF_MEMCS_DEFAULT) {
		ca.ca_csmem.cstag = __txcsbus_alloc_cstag(sc, &ca.ca_csmem);
	}

	ca.ca_irq1		= cf->cf_loc[TXCSBUSCF_IRQ1];
	ca.ca_irq2		= cf->cf_loc[TXCSBUSCF_IRQ2];
	ca.ca_irq3		= cf->cf_loc[TXCSBUSCF_IRQ3];
	
	if ((*cf->cf_attach->ca_match)(parent, cf, &ca)) {
		config_attach(parent, cf, &ca, txcsbus_print);
	}

	return 0;
}

bus_space_tag_t
__txcsbus_alloc_cstag(sc, csh)
	struct txcsbus_softc *sc;
	struct cs_handle *csh;
{
	/* TX39 CS mapping. (nonconfigurationable) */
	struct csmap {
		char	*cs_name;
		paddr_t	cs_addr;
		psize_t	cs_size;
	} __csmap[] = {
		[TX39_CS0]	= {"CS0(ROM)"	, TX39_SYSADDR_CS0	,
				   TX39_SYSADDR_CS_SIZE},
		[TX39_CS1]	= {"CS1"	, TX39_SYSADDR_CS1	,
				   TX39_SYSADDR_CS_SIZE},
		[TX39_CS2]	= {"CS2"	, TX39_SYSADDR_CS2	,
				   TX39_SYSADDR_CS_SIZE},
		[TX39_CS3]	= {"CS3"	, TX39_SYSADDR_CS3	,
				   TX39_SYSADDR_CS_SIZE},
		[TX39_MCS0]	= {"MCS0"	, TX39_SYSADDR_MCS0	,
				   TX39_SYSADDR_MCS_SIZE},
		[TX39_MCS1]	= {"MCS1"	, TX39_SYSADDR_MCS1	,
				   TX39_SYSADDR_MCS_SIZE},
#ifdef TX391X
		[TX39_MCS2]	= {"MCS2"	, TX39_SYSADDR_MCS2	,
				   TX39_SYSADDR_MCS_SIZE},
		[TX39_MCS3]	= {"MCS3"	, TX39_SYSADDR_MCS3	,
				   TX39_SYSADDR_MCS_SIZE},
#endif /* TX391X */
		[TX39_CARD1]	= {"CARD1(io/attr)", TX39_SYSADDR_CARD1	,
				   TX39_SYSADDR_CARD_SIZE},
		[TX39_CARD2]	= {"CARD2(io/attr)", TX39_SYSADDR_CARD2	,
				   TX39_SYSADDR_CARD_SIZE},
		[TX39_CARD1MEM]	= {"CARD1(mem)"	, TX39_SYSADDR_CARD1MEM	,
				   TX39_SYSADDR_CARD_SIZE},
		[TX39_CARD2MEM]	= {"CARD2(mem)"	, TX39_SYSADDR_CARD2MEM	,
				   TX39_SYSADDR_CARD_SIZE},
	};

	tx_chipset_tag_t tc = sc->sc_tc;
	int cs = csh->cs;
	int width = csh->cswidth;
	bus_space_tag_t iot;
	txreg_t reg;

 	if (!TX39_ISCS(cs) && !TX39_ISMCS(cs) && !TX39_ISCARD(cs)) {
		panic("txcsbus_alloc_tag: bogus chip select %d\n", cs);
	}

	printf("(%s)", __csmap[cs].cs_name);
	/* Already setuped chip select */
	if (sc->sc_cst[cs]) {
		return sc->sc_cst[cs];
	}

	iot = hpcmips_alloc_bus_space_tag();
	sc->sc_cst[cs] = iot;

	iot->t_base = __csmap[cs].cs_addr;
	iot->t_size = __csmap[cs].cs_size;
	strcpy(iot->t_name , __csmap[cs].cs_name);

	/* CS bus-width (configurationable) */
	switch (width) {
	default:
		panic("txcsbus_alloc_tag: bogus bus width %d\n", width);

	case 32:
		if (TX39_ISCS(cs)) {
			reg = tx_conf_read(tc, TX39_MEMCONFIG0_REG);
			reg |= (1 << cs);
			tx_conf_write(tc, TX39_MEMCONFIG0_REG, reg);
		} else if(TX39_ISMCS(cs)) {
#ifdef TX391X
			panic("txcsbus_alloc_tag: MCS is 16bit only");
#endif /* TX391X */
#ifdef TX392X
			reg = tx_conf_read(tc, TX39_MEMCONFIG1_REG);
			reg |= ((cs == TX39_MCS0) ? 
				TX39_MEMCONFIG1_MCS0_32 :
				TX39_MEMCONFIG1_MCS1_32);
			tx_conf_write(tc, TX39_MEMCONFIG1_REG, reg);
#endif /* TX392X */
		}
		break;

	case 16:
		if (TX39_ISCS(cs)) {
			reg = tx_conf_read(tc, TX39_MEMCONFIG0_REG);
			reg &= ~(1 << cs);
			tx_conf_write(tc, TX39_MEMCONFIG0_REG, reg);
		} else if(TX39_ISMCS(cs)) {
			/* TX391X always 16bit port */
#ifdef TX392X
			reg = tx_conf_read(tc, TX39_MEMCONFIG1_REG);
			reg &= ~((cs == TX39_MCS0) ? 
				 TX39_MEMCONFIG1_MCS0_32 :
				 TX39_MEMCONFIG1_MCS1_32);
			tx_conf_write(tc, TX39_MEMCONFIG1_REG, reg);
#endif /* TX392X */
		} else {
			/* CARD io/attr or mem */
			reg = tx_conf_read(tc, TX39_MEMCONFIG3_REG);

			/* enable I/O access */
			reg |= (cs == TX39_CARD1) ?
				TX39_MEMCONFIG3_CARD1IOEN :
				TX39_MEMCONFIG3_CARD2IOEN;
			/* disable 8bit access */
#ifdef TX392X
			reg &= ~((cs == TX39_CARD1) ?
				TX39_MEMCONFIG3_CARD1_8SEL :
				TX39_MEMCONFIG3_CARD2_8SEL);
#endif /* TX392X */
#ifdef TX391X
			reg &= ~TX39_MEMCONFIG3_PORT8SEL;
#endif /* TX391X */
			tx_conf_write(tc, TX39_MEMCONFIG3_REG, reg);
		}
		break;

	case 8:
		if (TX39_ISCARD(cs)) {
			reg = tx_conf_read(tc, TX39_MEMCONFIG3_REG);

			/* enable I/O access */
			reg |= (cs == TX39_CARD1) ?
				TX39_MEMCONFIG3_CARD1IOEN :
				TX39_MEMCONFIG3_CARD2IOEN;
			/* disable 8bit access */
#ifdef TX392X
			reg |= (cs == TX39_CARD1) ?
				TX39_MEMCONFIG3_CARD1_8SEL :
				TX39_MEMCONFIG3_CARD2_8SEL;
#endif /* TX392X */
#ifdef TX391X
			reg |= TX39_MEMCONFIG3_PORT8SEL;
#endif /* TX391X */
			tx_conf_write(tc, TX39_MEMCONFIG3_REG, reg);

		} else {
			panic("__txcsbus_alloc_cstag: CS%d 8bit mode is"
			      "not allowed");
		}
	}
	
	hpcmips_init_bus_space_extent(iot);
	printf("\n");

	return iot;
}