239 lines
6.3 KiB
C
239 lines
6.3 KiB
C
/* $NetBSD: tx39spi.c,v 1.5 2012/10/27 17:17:54 chs Exp $ */
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/*-
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* Copyright (c) 2005 HAMAJIMA Katsuomi. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Toshiba TX3912/3922 SPI module
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: tx39spi.c,v 1.5 2012/10/27 17:17:54 chs Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <hpcmips/tx/tx39var.h>
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#include <hpcmips/tx/tx39spivar.h>
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#include <hpcmips/tx/tx39spireg.h>
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#include <hpcmips/tx/tx39icureg.h>
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#include "locators.h"
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struct tx39spi_softc {
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tx_chipset_tag_t sc_tc;
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int sc_attached;
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};
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static int tx39spi_match(device_t, cfdata_t, void *);
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static void tx39spi_attach(device_t, device_t, void *);
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static int tx39spi_search(device_t, cfdata_t, const int *, void *);
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static int tx39spi_print(void *, const char *);
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#ifndef USE_POLL
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static int tx39spi_intr(void *);
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#endif
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CFATTACH_DECL_NEW(tx39spi, sizeof(struct tx39spi_softc),
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tx39spi_match, tx39spi_attach, NULL, NULL);
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int
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tx39spi_match(device_t parent, cfdata_t cf, void *aux)
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{
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return (ATTACH_NORMAL);
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}
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void
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tx39spi_attach(device_t parent, device_t self, void *aux)
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{
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struct txsim_attach_args *ta = aux;
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struct tx39spi_softc *sc = device_private(self);
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tx_chipset_tag_t tc = sc->sc_tc = ta->ta_tc;
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txreg_t reg;
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reg = tx_conf_read(tc, TX39_SPICTRL_REG);
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reg &= ~(TX39_SPICTRL_ENSPI);
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tx_conf_write(tc, TX39_SPICTRL_REG, reg);
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tx_conf_write(tc, TX39_INTRCLEAR5_REG, TX39_INTRSTATUS5_SPIBUFAVAILINT);
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tx_conf_write(tc, TX39_INTRCLEAR5_REG, TX39_INTRSTATUS5_SPIERRINT);
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tx_conf_write(tc, TX39_INTRCLEAR5_REG, TX39_INTRSTATUS5_SPIRCVINT);
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tx_conf_write(tc, TX39_INTRCLEAR5_REG, TX39_INTRSTATUS5_SPIEMPTYINT);
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#ifndef USE_POLL
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tx_intr_establish(tc, MAKEINTR(5, TX39_INTRSTATUS5_SPI),
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IST_EDGE, IPL_TTY, tx39spi_intr, sc);
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#endif
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printf("\n");
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config_search_ia(tx39spi_search, self, "txspiif", tx39spi_print);
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}
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int
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tx39spi_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
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{
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struct tx39spi_softc *sc = device_private(parent);
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struct txspi_attach_args sa;
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sa.sa_tc = sc->sc_tc;
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sa.sa_slot = cf->cf_loc[TXSPIIFCF_SLOT];
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if (sa.sa_slot == TXSPIIFCF_SLOT_DEFAULT) {
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printf("tx39spi_search: wildcarded slot, skipping\n");
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return 0;
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}
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if (!(sc->sc_attached & (1 << sa.sa_slot)) && /* not attached slot */
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config_match(parent, cf, &sa)) {
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config_attach(parent, cf, &sa, tx39spi_print);
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sc->sc_attached |= (1 << sa.sa_slot);
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}
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return 0;
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}
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int
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tx39spi_print(void *aux, const char *pnp)
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{
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struct txspi_attach_args *sa = aux;
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aprint_normal(" slot %d", sa->sa_slot);
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return (QUIET);
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}
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#ifndef USE_POLL
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int
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tx39spi_intr(void *)
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{
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return 0;
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}
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#endif
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int
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tx39spi_is_empty(struct tx39spi_softc *sc)
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{
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return tx_conf_read(sc->sc_tc, TX39_SPICTRL_REG) & (TX39_SPICTRL_EMPTY);
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}
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void
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tx39spi_put_word(struct tx39spi_softc *sc, int w)
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{
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tx_chipset_tag_t tc = sc->sc_tc;
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#ifdef USE_POLL
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while(!(tx_conf_read(tc, TX39_INTRSTATUS5_REG) & TX39_INTRSTATUS5_SPIBUFAVAILINT))
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;
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tx_conf_write(tc, TX39_INTRCLEAR5_REG, TX39_INTRSTATUS5_SPIBUFAVAILINT);
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#endif
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tx_conf_write(tc, TX39_SPITXHOLD_REG , w & 0xffff);
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}
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int
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tx39spi_get_word(struct tx39spi_softc *sc)
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{
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tx_chipset_tag_t tc = sc->sc_tc;
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#ifdef USE_POLL
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while(!(tx_conf_read(tc, TX39_INTRSTATUS5_REG) & TX39_INTRSTATUS5_SPIRCVINT))
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;
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tx_conf_write(tc, TX39_INTRCLEAR5_REG, TX39_INTRSTATUS5_SPIRCVINT);
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#endif
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return tx_conf_read(tc, TX39_SPIRXHOLD_REG) & 0xffff;
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}
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void
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tx39spi_enable(struct tx39spi_softc *sc, int n)
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{
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tx_chipset_tag_t tc = sc->sc_tc;
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txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG);
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if (n)
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reg |= (TX39_SPICTRL_ENSPI);
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else
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reg &= ~(TX39_SPICTRL_ENSPI);
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tx_conf_write(tc, TX39_SPICTRL_REG, reg);
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}
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void
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tx39spi_delayval(struct tx39spi_softc *sc, int n)
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{
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tx_chipset_tag_t tc = sc->sc_tc;
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txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG);
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tx_conf_write(tc, TX39_SPICTRL_REG, TX39_SPICTRL_DELAYVAL_SET(reg, n));
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}
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void
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tx39spi_baudrate(struct tx39spi_softc *sc, int n)
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{
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tx_chipset_tag_t tc = sc->sc_tc;
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txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG);
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tx_conf_write(tc, TX39_SPICTRL_REG, TX39_SPICTRL_BAUDRATE_SET(reg, n));
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}
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void
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tx39spi_word(struct tx39spi_softc *sc, int n)
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{
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tx_chipset_tag_t tc = sc->sc_tc;
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txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG);
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if (n)
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reg |= (TX39_SPICTRL_WORD);
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else
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reg &= ~(TX39_SPICTRL_WORD);
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tx_conf_write(tc, TX39_SPICTRL_REG, reg);
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}
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void
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tx39spi_phapol(struct tx39spi_softc *sc, int n)
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{
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tx_chipset_tag_t tc = sc->sc_tc;
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txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG);
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if (n)
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reg |= (TX39_SPICTRL_PHAPOL);
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else
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reg &= ~(TX39_SPICTRL_PHAPOL);
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tx_conf_write(tc, TX39_SPICTRL_REG, reg);
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}
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void
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tx39spi_clkpol(struct tx39spi_softc *sc, int n)
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{
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tx_chipset_tag_t tc = sc->sc_tc;
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txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG);
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if (n)
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reg |= (TX39_SPICTRL_CLKPOL);
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else
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reg &= ~(TX39_SPICTRL_CLKPOL);
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tx_conf_write(tc, TX39_SPICTRL_REG, reg);
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}
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void
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tx39spi_lsb(struct tx39spi_softc *sc, int n)
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{
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tx_chipset_tag_t tc = sc->sc_tc;
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txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG);
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if (n)
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reg |= (TX39_SPICTRL_LSB);
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else
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reg &= ~(TX39_SPICTRL_LSB);
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tx_conf_write(tc, TX39_SPICTRL_REG, reg);
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}
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