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hook up power, card detect, write protect gpios

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This commit is contained in:
jmcneill 2015-05-02 17:07:55 +00:00
parent 661ea74b3f
commit a1d68d25dd
1 changed files with 47 additions and 2 deletions
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49
sys/arch/arm/nvidia/tegra_sdhc.c
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@ -1,4 +1,4 @@
/* $NetBSD: tegra_sdhc.c,v 1.2 2015/05/02 14:10:03 jmcneill Exp $ */
/* $NetBSD: tegra_sdhc.c,v 1.3 2015/05/02 17:07:55 jmcneill Exp $ */
/*-
* Copyright (c) 2015 Jared D. McNeill <jmcneill@invisible.ca>
@ -29,7 +29,7 @@
#include "locators.h"
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: tegra_sdhc.c,v 1.2 2015/05/02 14:10:03 jmcneill Exp $");
__KERNEL_RCSID(0, "$NetBSD: tegra_sdhc.c,v 1.3 2015/05/02 17:07:55 jmcneill Exp $");
#include <sys/param.h>
#include <sys/bus.h>
@ -50,6 +50,9 @@ __KERNEL_RCSID(0, "$NetBSD: tegra_sdhc.c,v 1.2 2015/05/02 14:10:03 jmcneill Exp
static int tegra_sdhc_match(device_t, cfdata_t, void *);
static void tegra_sdhc_attach(device_t, device_t, void *);
static int tegra_sdhc_card_detect(struct sdhc_softc *);
static int tegra_sdhc_write_protect(struct sdhc_softc *);
struct tegra_sdhc_softc {
struct sdhc_softc sc;
@ -60,6 +63,10 @@ struct tegra_sdhc_softc {
bus_size_t sc_bsz;
struct sdhc_host *sc_host;
void *sc_ih;
struct tegra_gpio_pin *sc_pin_cd;
struct tegra_gpio_pin *sc_pin_power;
struct tegra_gpio_pin *sc_pin_wp;
};
CFATTACH_DECL_NEW(tegra_sdhc, sizeof(struct tegra_sdhc_softc),
@ -77,6 +84,8 @@ tegra_sdhc_attach(device_t parent, device_t self, void *aux)
struct tegra_sdhc_softc * const sc = device_private(self);
struct tegraio_attach_args * const tio = aux;
const struct tegra_locators * const loc = &tio->tio_loc;
prop_dictionary_t prop = device_properties(self);
const char *pin;
int error;
sc->sc.sc_dev = self;
@ -97,6 +106,22 @@ tegra_sdhc_attach(device_t parent, device_t self, void *aux)
sc->sc_bsz = loc->loc_size;
sc->sc_port = loc->loc_port;
if (prop_dictionary_get_cstring_nocopy(prop, "power-gpio", &pin)) {
sc->sc_pin_power = tegra_gpio_acquire(pin, GPIO_PIN_OUTPUT);
if (sc->sc_pin_power)
tegra_gpio_write(sc->sc_pin_power, 1);
}
if (prop_dictionary_get_cstring_nocopy(prop, "cd-gpio", &pin))
sc->sc_pin_cd = tegra_gpio_acquire(pin, GPIO_PIN_INPUT);
if (prop_dictionary_get_cstring_nocopy(prop, "wp-gpio", &pin))
sc->sc_pin_wp = tegra_gpio_acquire(pin, GPIO_PIN_INPUT);
if (sc->sc_pin_cd)
sc->sc.sc_vendor_card_detect = tegra_sdhc_card_detect;
if (sc->sc_pin_wp)
sc->sc.sc_vendor_write_protect = tegra_sdhc_write_protect;
/*
* The controller supports SDR104 speeds (208 MHz). With PLLP (408 Mhz)
* as input and div=2 we can get a reasonable 204 MHz for the SDHC.
@ -131,3 +156,23 @@ tegra_sdhc_attach(device_t parent, device_t self, void *aux)
return;
}
}
static int
tegra_sdhc_card_detect(struct sdhc_softc *ssc)
{
struct tegra_sdhc_softc *sc = device_private(ssc->sc_dev);
KASSERT(sc->sc_pin_cd != NULL);
return !tegra_gpio_read(sc->sc_pin_cd);
}
static int
tegra_sdhc_write_protect(struct sdhc_softc *ssc)
{
struct tegra_sdhc_softc *sc = device_private(ssc->sc_dev);
KASSERT(sc->sc_pin_wp != NULL);
return tegra_gpio_read(sc->sc_pin_wp);
}