250 lines
6.9 KiB
C
250 lines
6.9 KiB
C
/* $NetBSD: aupsc.c,v 1.7 2012/01/03 07:36:02 kiyohara Exp $ */
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/*-
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* Copyright (c) 2006 Shigeyuki Fukushima.
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* All rights reserved.
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*
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* Written by Shigeyuki Fukushima.
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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
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: aupsc.c,v 1.7 2012/01/03 07:36:02 kiyohara Exp $");
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#include "locators.h"
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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 <sys/errno.h>
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#include <sys/bus.h>
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#include <machine/cpu.h>
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#include <mips/alchemy/include/aubusvar.h>
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#include <mips/alchemy/include/aureg.h>
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#include <mips/alchemy/dev/aupscreg.h>
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#include <mips/alchemy/dev/aupscvar.h>
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#include <mips/alchemy/dev/ausmbus_pscreg.h>
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struct aupsc_softc {
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device_t sc_dev;
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bus_space_tag_t sc_bust;
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bus_space_handle_t sc_bush;
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int sc_pscsel;
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};
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const struct aupsc_proto {
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const char *name;
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int protocol;
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} aupsc_protos [] = {
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{ "ausmbus", AUPSC_SEL_SMBUS },
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{ "auspi", AUPSC_SEL_SPI },
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#if 0
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{ "auaudio" },
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{ "aui2s" },
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#endif
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{ NULL, AUPSC_SEL_DISABLE }
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};
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static int aupsc_match(device_t, struct cfdata *, void *);
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static void aupsc_attach(device_t, device_t, void *);
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static int aupsc_submatch(device_t, struct cfdata *, const int *, void *);
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static int aupsc_print(void *, const char *);
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static void aupsc_enable(void *, int);
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static void aupsc_disable(void *);
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static void aupsc_suspend(void *);
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CFATTACH_DECL_NEW(aupsc, sizeof(struct aupsc_softc),
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aupsc_match, aupsc_attach, NULL, NULL);
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static int
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aupsc_match(device_t parent, struct cfdata *cf, void *aux)
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{
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struct aubus_attach_args *aa = (struct aubus_attach_args *)aux;
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if (strcmp(aa->aa_name, cf->cf_name) != 0)
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return 0;
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return 1;
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}
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static void
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aupsc_attach(device_t parent, device_t self, void *aux)
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{
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int i;
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uint32_t rv;
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struct aupsc_softc *sc = device_private(self);
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struct aubus_attach_args *aa = (struct aubus_attach_args *)aux;
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struct aupsc_attach_args pa;
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struct aupsc_controller ctrl;
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sc->sc_dev = self;
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sc->sc_bust = aa->aa_st;
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if (bus_space_map(sc->sc_bust, aa->aa_addr,
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AUPSC_SIZE, 0, &sc->sc_bush) != 0) {
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aprint_error(": unable to map device registers\n");
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return;
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}
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/* Initialize PSC_SEL register */
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sc->sc_pscsel = AUPSC_SEL_DISABLE;
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rv = bus_space_read_4(sc->sc_bust, sc->sc_bush, AUPSC_SEL);
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bus_space_write_4(sc->sc_bust, sc->sc_bush,
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AUPSC_SEL, (rv & AUPSC_SEL_PS(AUPSC_SEL_DISABLE)));
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bus_space_write_4(sc->sc_bust, sc->sc_bush,
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AUPSC_CTRL, AUPSC_CTRL_ENA(AUPSC_CTRL_DISABLE));
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aprint_normal(": Alchemy PSC\n");
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aprint_naive("\n");
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ctrl.psc_bust = sc->sc_bust;
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ctrl.psc_bush = sc->sc_bush;
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ctrl.psc_sel = &(sc->sc_pscsel);
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ctrl.psc_enable = aupsc_enable;
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ctrl.psc_disable = aupsc_disable;
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ctrl.psc_suspend = aupsc_suspend;
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pa.aupsc_ctrl = ctrl;
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pa.aupsc_addr = aa->aa_addr;
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pa.aupsc_irq = aa->aa_irq[0];
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for (i = 0 ; aupsc_protos[i].name != NULL ; i++) {
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struct aupsc_protocol_device p;
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uint32_t s;
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pa.aupsc_name = aupsc_protos[i].name;
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p.sc_dev = sc->sc_dev;
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p.sc_ctrl = ctrl;
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aupsc_enable(&p, aupsc_protos[i].protocol);
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s = bus_space_read_4(sc->sc_bust, sc->sc_bush, AUPSC_STAT);
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aupsc_disable(&p);
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if (s & AUPSC_STAT_SR) {
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(void) config_found_sm_loc(self, "aupsc", NULL,
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&pa, aupsc_print, aupsc_submatch);
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}
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}
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}
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static int
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aupsc_submatch(device_t parent, struct cfdata *cf, const int *ldesc, void *aux)
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{
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return config_match(parent, cf, aux);
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}
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static int
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aupsc_print(void *aux, const char *pnp)
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{
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/*
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* By default we don't want to print anything, because
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* otherwise we see complaints about protocols that aren't
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* configured on every port. (E.g. each PSC can support 4
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* protocols, but on a typical design, only one protocol can
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* be configured per board.)
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*
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* Basically, this whole thing should be replaced with an
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* indirect configuration mechanism. Direct configuration
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* doesn't make sense when we absolutely require kernel
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* configuration to operate.
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*
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* Alternatively, a board-specific configuration mechanism
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* could determine this, and provide direct configuration as
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* we do for PCMCIA.
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*/
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return QUIET;
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}
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static void
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aupsc_enable(void *arg, int proto)
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{
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struct aupsc_protocol_device *sc = arg;
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int i;
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/* XXX: (TODO) setting clock AUPSC_SEL_CLK */
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switch (proto) {
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case AUPSC_SEL_SPI:
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case AUPSC_SEL_I2S:
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case AUPSC_SEL_AC97:
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case AUPSC_SEL_SMBUS:
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break;
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case AUPSC_SEL_DISABLE:
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aupsc_disable(arg);
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break;
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default:
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printf("%s: aupsc_enable: unsupported protocol.\n",
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device_xname(sc->sc_dev));
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return;
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}
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if (*(sc->sc_ctrl.psc_sel) != AUPSC_SEL_DISABLE) {
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printf("%s: aupsc_enable: please disable first.\n",
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device_xname(sc->sc_dev));
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return;
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}
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bus_space_write_4(sc->sc_ctrl.psc_bust, sc->sc_ctrl.psc_bush,
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AUPSC_SEL, AUPSC_SEL_PS(proto));
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bus_space_write_4(sc->sc_ctrl.psc_bust, sc->sc_ctrl.psc_bush,
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AUPSC_CTRL, AUPSC_CTRL_ENA(AUPSC_CTRL_ENABLE));
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/* wait up to a whole second, but test every 10us */
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for (i = 1000000; i; i -= 10) {
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if (bus_space_read_4(sc->sc_ctrl.psc_bust,
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sc->sc_ctrl.psc_bush, AUPSC_STAT) & AUPSC_STAT_SR)
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return;
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delay(10);
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}
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}
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static void
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aupsc_disable(void *arg)
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{
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struct aupsc_protocol_device *sc = arg;
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bus_space_write_4(sc->sc_ctrl.psc_bust, sc->sc_ctrl.psc_bush,
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AUPSC_SEL, AUPSC_SEL_PS(AUPSC_SEL_DISABLE));
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bus_space_write_4(sc->sc_ctrl.psc_bust, sc->sc_ctrl.psc_bush,
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AUPSC_CTRL, AUPSC_CTRL_ENA(AUPSC_CTRL_DISABLE));
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delay(1);
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}
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static void
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aupsc_suspend(void *arg)
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{
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struct aupsc_protocol_device *sc = arg;
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bus_space_write_4(sc->sc_ctrl.psc_bust, sc->sc_ctrl.psc_bush,
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AUPSC_CTRL, AUPSC_CTRL_ENA(AUPSC_CTRL_SUSPEND));
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delay(1);
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}
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