NetBSD-5.0.2/sys/arch/hpcmips/tx/tx39spi.c
/* $NetBSD: tx39spi.c,v 1.4 2005/12/11 12:17:34 christos Exp $ */
/*-
* Copyright (c) 2005 HAMAJIMA Katsuomi. 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. 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 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.
*/
/*
* Toshiba TX3912/3922 SPI module
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: tx39spi.c,v 1.4 2005/12/11 12:17:34 christos Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <hpcmips/tx/tx39var.h>
#include <hpcmips/tx/tx39spivar.h>
#include <hpcmips/tx/tx39spireg.h>
#include <hpcmips/tx/tx39icureg.h>
#include "locators.h"
struct tx39spi_softc {
struct device sc_dev;
tx_chipset_tag_t sc_tc;
int sc_attached;
};
static int tx39spi_match(struct device *, struct cfdata *, void *);
static void tx39spi_attach(struct device *, struct device *, void *);
static int tx39spi_search(struct device *, struct cfdata *,
const int *, void *);
static int tx39spi_print(void *, const char *);
#ifndef USE_POLL
static int tx39spi_intr(void *);
#endif
CFATTACH_DECL(tx39spi, sizeof(struct tx39spi_softc),
tx39spi_match, tx39spi_attach, NULL, NULL);
int
tx39spi_match(struct device *parent, struct cfdata *cf, void *aux)
{
return (ATTACH_NORMAL);
}
void
tx39spi_attach(struct device *parent, struct device *self, void *aux)
{
struct txsim_attach_args *ta = aux;
struct tx39spi_softc *sc = (void*)self;
tx_chipset_tag_t tc = sc->sc_tc = ta->ta_tc;
txreg_t reg;
reg = tx_conf_read(tc, TX39_SPICTRL_REG);
reg &= ~(TX39_SPICTRL_ENSPI);
tx_conf_write(tc, TX39_SPICTRL_REG, reg);
tx_conf_write(tc, TX39_INTRCLEAR5_REG, TX39_INTRSTATUS5_SPIBUFAVAILINT);
tx_conf_write(tc, TX39_INTRCLEAR5_REG, TX39_INTRSTATUS5_SPIERRINT);
tx_conf_write(tc, TX39_INTRCLEAR5_REG, TX39_INTRSTATUS5_SPIRCVINT);
tx_conf_write(tc, TX39_INTRCLEAR5_REG, TX39_INTRSTATUS5_SPIEMPTYINT);
#ifndef USE_POLL
tx_intr_establish(tc, MAKEINTR(5, TX39_INTRSTATUS5_SPI),
IST_EDGE, IPL_TTY, tx39spi_intr, sc);
#endif
printf("\n");
config_search_ia(tx39spi_search, self, "txspiif", tx39spi_print);
}
int
tx39spi_search(struct device *parent, struct cfdata *cf,
const int *ldesc, void *aux)
{
struct tx39spi_softc *sc = (void*)parent;
struct txspi_attach_args sa;
sa.sa_tc = sc->sc_tc;
sa.sa_slot = cf->cf_loc[TXSPIIFCF_SLOT];
if (sa.sa_slot == TXSPIIFCF_SLOT_DEFAULT) {
printf("tx39spi_search: wildcarded slot, skipping\n");
return 0;
}
if (!(sc->sc_attached & (1 << sa.sa_slot)) && /* not attached slot */
config_match(parent, cf, &sa)) {
config_attach(parent, cf, &sa, tx39spi_print);
sc->sc_attached |= (1 << sa.sa_slot);
}
return 0;
}
int
tx39spi_print(void *aux, const char *pnp)
{
struct txspi_attach_args *sa = aux;
aprint_normal(" slot %d", sa->sa_slot);
return (QUIET);
}
#ifndef USE_POLL
int
tx39spi_intr(void *)
{
return 0;
}
#endif
int
tx39spi_is_empty(struct tx39spi_softc *sc)
{
return tx_conf_read(sc->sc_tc, TX39_SPICTRL_REG) & (TX39_SPICTRL_EMPTY);
}
void
tx39spi_put_word(struct tx39spi_softc *sc, int w)
{
tx_chipset_tag_t tc = sc->sc_tc;
#ifdef USE_POLL
while(!(tx_conf_read(tc, TX39_INTRSTATUS5_REG) & TX39_INTRSTATUS5_SPIBUFAVAILINT))
;
tx_conf_write(tc, TX39_INTRCLEAR5_REG, TX39_INTRSTATUS5_SPIBUFAVAILINT);
#endif
tx_conf_write(tc, TX39_SPITXHOLD_REG , w & 0xffff);
}
int
tx39spi_get_word(struct tx39spi_softc *sc)
{
tx_chipset_tag_t tc = sc->sc_tc;
#ifdef USE_POLL
while(!(tx_conf_read(tc, TX39_INTRSTATUS5_REG) & TX39_INTRSTATUS5_SPIRCVINT))
;
tx_conf_write(tc, TX39_INTRCLEAR5_REG, TX39_INTRSTATUS5_SPIRCVINT);
#endif
return tx_conf_read(tc, TX39_SPIRXHOLD_REG) & 0xffff;
}
void
tx39spi_enable(struct tx39spi_softc *sc, int n)
{
tx_chipset_tag_t tc = sc->sc_tc;
txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG);
if (n)
reg |= (TX39_SPICTRL_ENSPI);
else
reg &= ~(TX39_SPICTRL_ENSPI);
tx_conf_write(tc, TX39_SPICTRL_REG, reg);
}
void
tx39spi_delayval(struct tx39spi_softc *sc, int n)
{
tx_chipset_tag_t tc = sc->sc_tc;
txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG);
tx_conf_write(tc, TX39_SPICTRL_REG, TX39_SPICTRL_DELAYVAL_SET(reg, n));
}
void
tx39spi_baudrate(struct tx39spi_softc *sc, int n)
{
tx_chipset_tag_t tc = sc->sc_tc;
txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG);
tx_conf_write(tc, TX39_SPICTRL_REG, TX39_SPICTRL_BAUDRATE_SET(reg, n));
}
void
tx39spi_word(struct tx39spi_softc *sc, int n)
{
tx_chipset_tag_t tc = sc->sc_tc;
txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG);
if (n)
reg |= (TX39_SPICTRL_WORD);
else
reg &= ~(TX39_SPICTRL_WORD);
tx_conf_write(tc, TX39_SPICTRL_REG, reg);
}
void
tx39spi_phapol(struct tx39spi_softc *sc, int n)
{
tx_chipset_tag_t tc = sc->sc_tc;
txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG);
if (n)
reg |= (TX39_SPICTRL_PHAPOL);
else
reg &= ~(TX39_SPICTRL_PHAPOL);
tx_conf_write(tc, TX39_SPICTRL_REG, reg);
}
void
tx39spi_clkpol(struct tx39spi_softc *sc, int n)
{
tx_chipset_tag_t tc = sc->sc_tc;
txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG);
if (n)
reg |= (TX39_SPICTRL_CLKPOL);
else
reg &= ~(TX39_SPICTRL_CLKPOL);
tx_conf_write(tc, TX39_SPICTRL_REG, reg);
}
void
tx39spi_lsb(struct tx39spi_softc *sc, int n)
{
tx_chipset_tag_t tc = sc->sc_tc;
txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG);
if (n)
reg |= (TX39_SPICTRL_LSB);
else
reg &= ~(TX39_SPICTRL_LSB);
tx_conf_write(tc, TX39_SPICTRL_REG, reg);
}