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hw/gpio: Connect SD controller to BCM2838 GPIO

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Signed-off-by: Sergey Kambalin <sergey.kambalin@auriga.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20240226000259.2752893-9-sergey.kambalin@auriga.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Sergey Kambalin 2024-02-25 18:02:26 -06:00 committed by Peter Maydell
parent 0c8b40db67
commit b54a9a5679
2 changed files with 56 additions and 1 deletions
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52
hw/gpio/bcm2838_gpio.c
View File

@ -17,6 +17,7 @@
#include "qapi/error.h"
#include "hw/sysbus.h"
#include "migration/vmstate.h"
#include "hw/sd/sd.h"
#include "hw/gpio/bcm2838_gpio.h"
#include "hw/irq.h"
@ -63,6 +64,16 @@
#define BYTES_IN_WORD 4
/* bcm,function property */
#define BCM2838_FSEL_GPIO_IN 0
#define BCM2838_FSEL_GPIO_OUT 1
#define BCM2838_FSEL_ALT5 2
#define BCM2838_FSEL_ALT4 3
#define BCM2838_FSEL_ALT0 4
#define BCM2838_FSEL_ALT1 5
#define BCM2838_FSEL_ALT2 6
#define BCM2838_FSEL_ALT3 7
static uint32_t gpfsel_get(BCM2838GpioState *s, uint8_t reg)
{
int i;
@ -86,6 +97,31 @@ static void gpfsel_set(BCM2838GpioState *s, uint8_t reg, uint32_t value)
s->fsel[index] = fsel;
}
}
/* SD controller selection (48-53) */
if (s->sd_fsel != BCM2838_FSEL_GPIO_IN
&& (s->fsel[48] == BCM2838_FSEL_GPIO_IN)
&& (s->fsel[49] == BCM2838_FSEL_GPIO_IN)
&& (s->fsel[50] == BCM2838_FSEL_GPIO_IN)
&& (s->fsel[51] == BCM2838_FSEL_GPIO_IN)
&& (s->fsel[52] == BCM2838_FSEL_GPIO_IN)
&& (s->fsel[53] == BCM2838_FSEL_GPIO_IN)
) {
/* SDHCI controller selected */
sdbus_reparent_card(s->sdbus_sdhost, s->sdbus_sdhci);
s->sd_fsel = BCM2838_FSEL_GPIO_IN;
} else if (s->sd_fsel != BCM2838_FSEL_ALT0
&& (s->fsel[48] == BCM2838_FSEL_ALT0) /* SD_CLK_R */
&& (s->fsel[49] == BCM2838_FSEL_ALT0) /* SD_CMD_R */
&& (s->fsel[50] == BCM2838_FSEL_ALT0) /* SD_DATA0_R */
&& (s->fsel[51] == BCM2838_FSEL_ALT0) /* SD_DATA1_R */
&& (s->fsel[52] == BCM2838_FSEL_ALT0) /* SD_DATA2_R */
&& (s->fsel[53] == BCM2838_FSEL_ALT0) /* SD_DATA3_R */
) {
/* SDHost controller selected */
sdbus_reparent_card(s->sdbus_sdhci, s->sdbus_sdhost);
s->sd_fsel = BCM2838_FSEL_ALT0;
}
}
static int gpfsel_is_out(BCM2838GpioState *s, int index)
@ -266,6 +302,11 @@ static void bcm2838_gpio_reset(DeviceState *dev)
memset(s->fsel, 0, sizeof(s->fsel));
s->sd_fsel = 0;
/* SDHCI is selected by default */
sdbus_reparent_card(&s->sdbus, s->sdbus_sdhci);
s->lev0 = 0;
s->lev1 = 0;
@ -304,6 +345,8 @@ static void bcm2838_gpio_init(Object *obj)
DeviceState *dev = DEVICE(obj);
SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
qbus_init(&s->sdbus, sizeof(s->sdbus), TYPE_SD_BUS, DEVICE(s), "sd-bus");
memory_region_init_io(&s->iomem, obj, &bcm2838_gpio_ops, s,
"bcm2838_gpio", BCM2838_GPIO_REGS_SIZE);
sysbus_init_mmio(sbd, &s->iomem);
@ -312,7 +355,14 @@ static void bcm2838_gpio_init(Object *obj)
static void bcm2838_gpio_realize(DeviceState *dev, Error **errp)
{
/* Temporary stub. Do nothing */
BCM2838GpioState *s = BCM2838_GPIO(dev);
Object *obj;
obj = object_property_get_link(OBJECT(dev), "sdbus-sdhci", &error_abort);
s->sdbus_sdhci = SD_BUS(obj);
obj = object_property_get_link(OBJECT(dev), "sdbus-sdhost", &error_abort);
s->sdbus_sdhost = SD_BUS(obj);
}
static void bcm2838_gpio_class_init(ObjectClass *klass, void *data)

5
include/hw/gpio/bcm2838_gpio.h
View File

@ -14,6 +14,7 @@
#ifndef BCM2838_GPIO_H
#define BCM2838_GPIO_H
#include "hw/sd/sd.h"
#include "hw/sysbus.h"
#include "qom/object.h"
@ -29,6 +30,10 @@ struct BCM2838GpioState {
MemoryRegion iomem;
/* SDBus selector */
SDBus sdbus;
SDBus *sdbus_sdhci;
SDBus *sdbus_sdhost;
uint8_t fsel[BCM2838_GPIO_NUM];
uint32_t lev0, lev1;