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hw/char/bcm2835_aux: Really use RX FIFO depth

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While we model a 8-elements RX FIFO since the BCM2835 AUX model
was introduced in commit 97398d900c ("bcm2835_aux: add emulation
of BCM2835 AUX block") we only read 1 char at a time!

Have the IOCanReadHandler handler return how many elements are
available, and use that in the IOReadHandler handler.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Luc Michel <luc.michel@amd.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250220092903.3726-6-philmd@linaro.org>
This commit is contained in:
Philippe Mathieu-Daudé 2025-02-19 16:23:13 +01:00
parent 3e0f118f82
commit 2e6b2e0875
1 changed files with 4 additions and 2 deletions
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6
hw/char/bcm2835_aux.c
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@ -221,7 +221,7 @@ static int bcm2835_aux_can_receive(void *opaque)
{
BCM2835AuxState *s = opaque;
return s->read_count < BCM2835_AUX_RX_FIFO_LEN;
return BCM2835_AUX_RX_FIFO_LEN - s->read_count;
}
static void bcm2835_aux_put_fifo(void *opaque, uint8_t value)
@ -243,7 +243,9 @@ static void bcm2835_aux_put_fifo(void *opaque, uint8_t value)
static void bcm2835_aux_receive(void *opaque, const uint8_t *buf, int size)
{
bcm2835_aux_put_fifo(opaque, *buf);
for (int i = 0; i < size; i++) {
bcm2835_aux_put_fifo(opaque, buf[i]);
}
}
static const MemoryRegionOps bcm2835_aux_ops = {