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hw/pl181: Implement GPIO output pins for card status 

Add two GPIO output pins to the PL181 model to indicate the card
present and readonly status information. On ARM boards these usually
are reflected in a system register.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Peter Maydell 2011-02-21 20:57:49 +00:00 committed by Aurelien Jarno
parent 444dd39b5f
commit c31a4724e2
1 changed files with 6 additions and 0 deletions
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6
hw/pl181.c
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@ -47,6 +47,8 @@ typedef struct {
int linux_hack;
uint32_t fifo[PL181_FIFO_LEN];
qemu_irq irq[2];
/* GPIO outputs for 'card is readonly' and 'card inserted' */
qemu_irq cardstatus[2];
} pl181_state;
#define PL181_CMD_INDEX 0x3f
@ -444,6 +446,9 @@ static void pl181_reset(void *opaque)
s->linux_hack = 0;
s->mask[0] = 0;
s->mask[1] = 0;
/* We can assume our GPIO outputs have been wired up now */
sd_set_cb(s->card, s->cardstatus[0], s->cardstatus[1]);
}
static int pl181_init(SysBusDevice *dev)
@ -457,6 +462,7 @@ static int pl181_init(SysBusDevice *dev)
sysbus_init_mmio(dev, 0x1000, iomemtype);
sysbus_init_irq(dev, &s->irq[0]);
sysbus_init_irq(dev, &s->irq[1]);
qdev_init_gpio_out(&s->busdev.qdev, s->cardstatus, 2);
dinfo = drive_get_next(IF_SD);
s->card = sd_init(dinfo ? dinfo->bdrv : NULL, 0);
qemu_register_reset(pl181_reset, s);