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/* $OpenBSD: sdhc_acpi.c,v 1.22 2022/10/08 19:46:52 kettenis Exp $ */
/*
* Copyright (c) 2016 Mark Kettenis
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/malloc.h>
#include <sys/systm.h>
#include <dev/acpi/acpireg.h>
#include <dev/acpi/acpivar.h>
#include <dev/acpi/acpidev.h>
#include <dev/acpi/amltypes.h>
#include <dev/acpi/dsdt.h>
#undef DEVNAME
#include <dev/sdmmc/sdhcreg.h>
#include <dev/sdmmc/sdhcvar.h>
#include <dev/sdmmc/sdmmcvar.h>
struct sdhc_acpi_softc {
struct sdhc_softc sc;
struct acpi_softc *sc_acpi;
struct aml_node *sc_node;
bus_space_tag_t sc_memt;
bus_space_handle_t sc_memh;
void *sc_ih;
struct aml_node *sc_gpio_int_node;
struct aml_node *sc_gpio_io_node;
uint16_t sc_gpio_int_pin;
uint16_t sc_gpio_int_flags;
uint16_t sc_gpio_io_pin;
struct sdhc_host *sc_host;
};
int sdhc_acpi_match(struct device *, void *, void *);
void sdhc_acpi_attach(struct device *, struct device *, void *);
const struct cfattach sdhc_acpi_ca = {
sizeof(struct sdhc_acpi_softc), sdhc_acpi_match, sdhc_acpi_attach
};
const char *sdhc_hids[] = {
"PNP0D40",
"80860F14",
"BCM2847", /* Raspberry Pi3/4 "arasan" controller */
"BRCME88C", /* Raspberry Pi4 "emmc2" controller */
"INT33BB",
"PNP0FFF",
"QCOM24BF",
NULL
};
int sdhc_acpi_parse_resources(int, union acpi_resource *, void *);
int sdhc_acpi_card_detect_nonremovable(struct sdhc_softc *);
int sdhc_acpi_card_detect_gpio(struct sdhc_softc *);
int sdhc_acpi_card_detect_intr(void *);
void sdhc_acpi_power_on(struct sdhc_acpi_softc *, struct aml_node *);
void sdhc_acpi_explore(struct sdhc_acpi_softc *);
int
sdhc_acpi_match(struct device *parent, void *match, void *aux)
{
struct acpi_attach_args *aaa = aux;
struct cfdata *cf = match;
if (aaa->aaa_naddr < 1 || aaa->aaa_nirq < 1)
return 0;
return acpi_matchhids(aaa, sdhc_hids, cf->cf_driver->cd_name);
}
void
sdhc_acpi_attach(struct device *parent, struct device *self, void *aux)
{
struct sdhc_acpi_softc *sc = (struct sdhc_acpi_softc *)self;
struct acpi_attach_args *aaa = aux;
struct aml_value res;
uint64_t capmask, capset;
sc->sc_acpi = (struct acpi_softc *)parent;
sc->sc_node = aaa->aaa_node;
printf(" %s", sc->sc_node->name);
if (aml_evalname(sc->sc_acpi, sc->sc_node, "_CRS", 0, NULL, &res)) {
printf(": can't find registers\n");
return;
}
aml_parse_resource(&res, sdhc_acpi_parse_resources, sc);
printf(" addr 0x%llx/0x%llx", aaa->aaa_addr[0], aaa->aaa_size[0]);
printf(" irq %d", aaa->aaa_irq[0]);
sc->sc_memt = aaa->aaa_bst[0];
if (bus_space_map(sc->sc_memt, aaa->aaa_addr[0], aaa->aaa_size[0],
0, &sc->sc_memh)) {
printf(": can't map registers\n");
return;
}
sc->sc_ih = acpi_intr_establish(aaa->aaa_irq[0], aaa->aaa_irq_flags[0],
IPL_BIO, sdhc_intr, sc, sc->sc.sc_dev.dv_xname);
if (sc->sc_ih == NULL) {
printf(": can't establish interrupt\n");
return;
}
if (sc->sc_gpio_io_node && sc->sc_gpio_io_node->gpio) {
sc->sc.sc_card_detect = sdhc_acpi_card_detect_gpio;
printf(", gpio");
}
printf("\n");
if (sc->sc_gpio_int_node && sc->sc_gpio_int_node->gpio) {
struct acpi_gpio *gpio = sc->sc_gpio_int_node->gpio;
gpio->intr_establish(gpio->cookie, sc->sc_gpio_int_pin,
sc->sc_gpio_int_flags, sdhc_acpi_card_detect_intr, sc);
}
sdhc_acpi_power_on(sc, sc->sc_node);
sdhc_acpi_explore(sc);
capmask = acpi_getpropint(sc->sc_node, "sdhci-caps-mask", 0);
capset = acpi_getpropint(sc->sc_node, "sdhci-caps", 0);
/* Raspberry Pi4 "emmc2" controller. */
if (strcmp(aaa->aaa_dev, "BRCME88C") == 0)
sc->sc.sc_flags |= SDHC_F_NOPWR0;
sc->sc.sc_host = &sc->sc_host;
sc->sc.sc_dmat = aaa->aaa_dmat;
sc->sc.sc_clkbase = acpi_getpropint(sc->sc_node,
"clock-frequency", 0) / 1000;
sdhc_host_found(&sc->sc, sc->sc_memt, sc->sc_memh,
aaa->aaa_size[0], 1, capmask, capset);
}
int
sdhc_acpi_parse_resources(int crsidx, union acpi_resource *crs, void *arg)
{
struct sdhc_acpi_softc *sc = arg;
int type = AML_CRSTYPE(crs);
struct aml_node *node;
uint16_t pin;
switch (type) {
case LR_GPIO:
node = aml_searchname(sc->sc_node, (char *)&crs->pad[crs->lr_gpio.res_off]);
pin = *(uint16_t *)&crs->pad[crs->lr_gpio.pin_off];
if (crs->lr_gpio.type == LR_GPIO_INT) {
sc->sc_gpio_int_node = node;
sc->sc_gpio_int_pin = pin;
sc->sc_gpio_int_flags = crs->lr_gpio.tflags;
} else if (crs->lr_gpio.type == LR_GPIO_IO) {
sc->sc_gpio_io_node = node;
sc->sc_gpio_io_pin = pin;
}
break;
}
return 0;
}
int
sdhc_acpi_card_detect_nonremovable(struct sdhc_softc *ssc)
{
return 1;
}
int
sdhc_acpi_card_detect_gpio(struct sdhc_softc *ssc)
{
struct sdhc_acpi_softc *sc = (struct sdhc_acpi_softc *)ssc;
struct acpi_gpio *gpio = sc->sc_gpio_io_node->gpio;
uint16_t pin = sc->sc_gpio_io_pin;
/* Card detect GPIO signal is active-low. */
return !gpio->read_pin(gpio->cookie, pin);
}
int
sdhc_acpi_card_detect_intr(void *arg)
{
struct sdhc_acpi_softc *sc = arg;
sdhc_needs_discover(&sc->sc);
return (1);
}
void
sdhc_acpi_power_on(struct sdhc_acpi_softc *sc, struct aml_node *node)
{
node = aml_searchname(node, "_PS0");
if (node && aml_evalnode(sc->sc_acpi, node, 0, NULL, NULL))
printf("%s: _PS0 failed\n", sc->sc.sc_dev.dv_xname);
}
int
sdhc_acpi_do_explore(struct aml_node *node, void *arg)
{
struct sdhc_acpi_softc *sc = arg;
int64_t sta, rmv;
/* We're only interested in our children. */
if (node == sc->sc_node)
return 0;
/* Only consider devices that are actually present. */
if (node->value == NULL ||
node->value->type != AML_OBJTYPE_DEVICE)
return 1;
if (aml_evalinteger(sc->sc_acpi, node, "_STA", 0, NULL, &sta))
sta = STA_PRESENT | STA_ENABLED | STA_DEV_OK | 0x1000;
if ((sta & STA_PRESENT) == 0)
return 1;
acpi_attach_deps(sc->sc_acpi, node);
/* Override card detect if we have non-removable devices. */
if (aml_evalinteger(sc->sc_acpi, node, "_RMV", 0, NULL, &rmv))
rmv = 1;
if (rmv == 0) {
sc->sc.sc_flags |= SDHC_F_NONREMOVABLE;
if (sc->sc.sc_card_detect == NULL) {
sc->sc.sc_card_detect =
sdhc_acpi_card_detect_nonremovable;
}
}
sdhc_acpi_power_on(sc, node);
return 1;
}
void
sdhc_acpi_explore(struct sdhc_acpi_softc *sc)
{
aml_walknodes(sc->sc_node, AML_WALK_PRE, sdhc_acpi_do_explore, sc);
}
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