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Improvements to VIA AC97 per suggestions

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This commit is contained in:
RichardG867
2021-07-23 01:07:53 -03:00
parent b5e0cbd152
commit 562bbe167c
1 changed files with 12 additions and 26 deletions
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38
src/sound/snd_ac97_via.c
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@@ -111,34 +111,20 @@ ac97_via_read_status(void *priv, uint8_t modem)
return ret;
}
#include <86box/nmi.h>
static void
ac97_via_update_irqs(ac97_via_t *dev, uint8_t iflag_clear)
{
uint8_t do_irq = 0;
/* Check interrupt flags on all SGDs. */
for (uint8_t i = 0; i < (sizeof(dev->sgd) / sizeof(dev->sgd[0])); i++) {
if (dev->sgd_regs[i << 4] & (dev->sgd_regs[(i << 4) | 0x02] & 0x03)) {
ac97_via_log("AC97 VIA: Setting IRQ (sgd %d iflags %02X stuck %d)\n",
i, dev->sgd_regs[i << 4] & (dev->sgd_regs[(i << 4) | 0x02] & 0x03), dev->irq_stuck);
for (uint8_t i = 0; i < (sizeof(dev->sgd) / sizeof(dev->sgd[0])); i++)
do_irq |= (dev->sgd_regs[i << 4] & (dev->sgd_regs[(i << 4) | 0x02] & 0x03));
if (dev->irq_stuck && !iflag_clear) {
#ifdef ENABLE_AC97_VIA_LOG
ac97_via_lost_irqs++;
#endif
pci_clear_irq(dev->slot, dev->irq_pin);
} else {
pci_set_irq(dev->slot, dev->irq_pin);
}
dev->irq_stuck = !dev->irq_stuck;
return;
}
}
/* No interrupt pending. */
//ac97_via_log("AC97 VIA: Clearing IRQ\n");
pci_clear_irq(dev->slot, dev->irq_pin);
dev->irq_stuck = 0;
if (do_irq)
pci_set_irq(dev->slot, dev->irq_pin);
else
pci_clear_irq(dev->slot, dev->irq_pin);
}
@@ -495,7 +481,7 @@ ac97_via_sgd_process(void *priv)
if (!sgd->sample_ptr) {
/* Start at first entry if no pointer is present. */
if (!sgd->entry_ptr)
sgd->entry_ptr = (dev->sgd_regs[sgd->id | 0x7] << 24) | (dev->sgd_regs[sgd->id | 0x6] << 16) | (dev->sgd_regs[sgd->id | 0x5] << 8) | (dev->sgd_regs[sgd->id | 0x4] & 0xfe);
sgd->entry_ptr = *((uint32_t *) &dev->sgd_regs[sgd->id | 0x4]) & 0xfffffffe;
/* Read entry. */
sgd->sample_ptr = mem_readl_phys(sgd->entry_ptr);
@@ -517,8 +503,8 @@ ac97_via_sgd_process(void *priv)
}
if (sgd->id & 0x10) {
/* Write channel: read data from FIFO. */
mem_writel_phys(sgd->sample_ptr, *((uint32_t *) &sgd->fifo[sgd->fifo_end & (sizeof(sgd->fifo) - 1)]));
/* Write channel: read data from FIFO. */
mem_writel_phys(sgd->sample_ptr, *((uint32_t *) &sgd->fifo[sgd->fifo_end & (sizeof(sgd->fifo) - 1)]));
} else {
/* Read channel: write data to FIFO. */
*((uint32_t *) &sgd->fifo[sgd->fifo_end & (sizeof(sgd->fifo) - 1)]) = mem_readl_phys(sgd->sample_ptr);