/* $NetBSD: g42xxeb_mci.c,v 1.3 2012/01/21 19:44:28 nonaka Exp $ */
/*-
* Copyright (c) 2009 Genetec Corporation. All rights reserved.
* Written by Hiroyuki Bessho for Genetec Corporation.
*
* 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 REGENTS 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 REGENTS
* 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.
*/
/* derived from zaurus/dev/zmci.c */
/*-
* Copyright (C) 2006-2008 NONAKA Kimihiro <nonaka@netbsd.org>
* 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 ``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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: g42xxeb_mci.c,v 1.3 2012/01/21 19:44:28 nonaka Exp $");
#include <sys/param.h>
#include <sys/device.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/pmf.h>
#include <machine/intr.h>
#include <arm/xscale/pxa2x0cpu.h>
#include <arm/xscale/pxa2x0reg.h>
#include <arm/xscale/pxa2x0var.h>
#include <arm/xscale/pxa2x0_gpio.h>
#include <arm/xscale/pxa2x0_mci.h>
#include <dev/sdmmc/sdmmcreg.h>
#include <arm/xscale/pxa2x0var.h>
#include <evbarm/g42xxeb/g42xxeb_var.h>
struct g42xxeb_mci_softc {
struct pxamci_softc sc_mci;
bus_space_tag_t sc_obio_iot;
bus_space_handle_t sc_obio_ioh;
void *sc_detect_ih;
};
static int pxamci_match(device_t, cfdata_t, void *);
static void pxamci_attach(device_t, device_t, void *);
CFATTACH_DECL_NEW(pxamci_obio, sizeof(struct g42xxeb_mci_softc),
pxamci_match, pxamci_attach, NULL, NULL);
static int g42xxeb_mci_intr(void *arg);
static uint32_t g42xxeb_mci_get_ocr(void *);
static int g42xxeb_mci_set_power(void *, uint32_t);
static int g42xxeb_mci_card_detect(void *);
static int g42xxeb_mci_write_protect(void *);
static int
pxamci_match(device_t parent, cfdata_t cf, void *aux)
{
if (strcmp(cf->cf_name, "pxamci") == 0)
return 1;
return 0;
}
struct pxa2x0_gpioconf g42xxeb_pxamci_gpioconf[] = {
{ 6, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* MMCCLK */
{ 8, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* MMCCS0 */
{ 9, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* MMCCS1 */
{ -1 }
};
static void
pxamci_attach(device_t parent, device_t self, void *aux)
{
struct g42xxeb_mci_softc *sc = device_private(self);
struct obio_attach_args *oba = aux;
struct obio_softc *osc = device_private(parent);
struct pxaip_attach_args pxa;
struct pxa2x0_gpioconf *gpioconf[] = {
g42xxeb_pxamci_gpioconf,
NULL
};
bus_space_tag_t iot = oba->oba_iot;
sc->sc_mci.sc_dev = self;
pxa2x0_gpio_config(gpioconf);
/* Establish card detect interrupt */
sc->sc_detect_ih = obio_intr_establish(osc, G42XXEB_INT_MMCSD,
IPL_BIO, IST_EDGE_BOTH, g42xxeb_mci_intr, sc);
if (sc->sc_detect_ih == NULL) {
aprint_error_dev(self,
"unable to establish SD detect interrupt\n");
return;
}
sc->sc_mci.sc_tag.cookie = sc;
sc->sc_mci.sc_tag.get_ocr = g42xxeb_mci_get_ocr;
sc->sc_mci.sc_tag.set_power = g42xxeb_mci_set_power;
sc->sc_mci.sc_tag.card_detect = g42xxeb_mci_card_detect;
sc->sc_mci.sc_tag.write_protect = g42xxeb_mci_write_protect;
sc->sc_mci.sc_caps = 0;
pxa.pxa_iot = iot; /* actually, here we want I/O tag for
pxaip, not for obio. */
#if 0
/* pxamci_attach_sub() ignores following values and uses
* constants. */
pxa.pxa_addr = PXA2X0_MMC_BASE;
pxa.pxa_size = PXA2X0_MMC_SIZE;
pxa.pxa_intr = PXA2X0_INT_MMC;
#endif
/* disable DMA for sdmmc for now. */
SET(sc->sc_mci.sc_caps, PMC_CAPS_NO_DMA);
if (pxamci_attach_sub(self, &pxa)) {
aprint_error_dev(self,
"unable to attach MMC controller\n");
goto free_intr;
}
if (!pmf_device_register(self, NULL, NULL)) {
aprint_error_dev(self,
"couldn't establish power handler\n");
}
sc->sc_obio_iot = iot;
sc->sc_obio_ioh = osc->sc_obioreg_ioh;
return;
free_intr:
obio_intr_disestablish(osc, G42XXEB_INT_MMCSD, sc->sc_detect_ih);
sc->sc_detect_ih = NULL;
}
static int
g42xxeb_mci_intr(void *arg)
{
struct g42xxeb_mci_softc *sc = (struct g42xxeb_mci_softc *)arg;
pxamci_card_detect_event(&sc->sc_mci);
return 1;
}
static uint32_t
g42xxeb_mci_get_ocr(void *arg)
{
return MMC_OCR_3_2V_3_3V;
}
static int
g42xxeb_mci_set_power(void *arg, uint32_t ocr)
{
/* nothing to do */
return 0;
}
/*
* Return non-zero if the card is currently inserted.
*/
static int
g42xxeb_mci_card_detect(void *arg)
{
struct g42xxeb_mci_softc *sc = (struct g42xxeb_mci_softc *)arg;
uint16_t reg;
reg = bus_space_read_2(sc->sc_obio_iot, sc->sc_obio_ioh,
G42XXEB_INTSTS2);
return !(reg & (1<<G42XXEB_INT_MMCSD));
}
/*
* Return non-zero if the card is currently write-protected.
*/
static int
g42xxeb_mci_write_protect(void *arg)
{
struct g42xxeb_mci_softc *sc = (struct g42xxeb_mci_softc *)arg;
uint16_t reg;
reg = bus_space_read_2(sc->sc_obio_iot, sc->sc_obio_ioh,
G42XXEB_WP);
return reg & 1;
}