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usb: Start implementing end-of-frame and start-of-frame signals

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This commit is contained in:
Cacodemon345
2023-05-07 00:33:15 +06:00
parent 41f26b57c2
commit 04e440e608
1 changed files with 16 additions and 1 deletions
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17
src/usb.c
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@@ -239,6 +239,18 @@ ohci_set_interrupt(usb_t* usb, uint8_t bit)
usb_interrupt_ohci(usb);
}
void
ohci_end_of_frame(usb_t* dev)
{
/* TODO: Put endpoint and transfer descriptor processing here. */
}
void
ohci_start_of_frame(usb_t* dev)
{
ohci_set_interrupt(dev, OHCI_HcInterruptEnable_SO);
}
void
ohci_update_frame_counter(void* priv)
{
@@ -246,12 +258,15 @@ ohci_update_frame_counter(void* priv)
dev->ohci_mmio_w[OHCI_HcFmRemaining / 2] &= 0x3fff;
if (dev->ohci_mmio_w[OHCI_HcFmRemaining / 2] == 0) {
ohci_end_of_frame(dev);
dev->ohci_mmio_w[OHCI_HcFmRemaining / 2] = dev->ohci_mmio_w[OHCI_HcFmInterval / 2] & 0x3fff;
dev->ohci_mmio_l[OHCI_HcFmRemaining / 4] &= ~(1 << 31);
dev->ohci_mmio_l[OHCI_HcFmRemaining / 4] |= dev->ohci_mmio_l[OHCI_HcFmInterval / 4] & (1 << 31);
ohci_set_interrupt(dev, OHCI_HcInterruptEnable_SO);
dev->ohci_mmio_w[OHCI_HcFmNumber / 2]++;
ohci_start_of_frame(dev);
}
if (dev->ohci_mmio_w[OHCI_HcFmRemaining / 2]) dev->ohci_mmio_w[OHCI_HcFmRemaining / 2]--;
timer_on_auto(&dev->ohci_frame_timer, 1. / (12. * 1000. * 1000.));
}
void