From ae123f1f380e00f85215b99e289838a7ccf115a3 Mon Sep 17 00:00:00 2001
From: Cacodemon345 <wahil1976@outlook.com>
Date: Sun, 7 May 2023 16:55:15 +0600
Subject: [PATCH] usb: Implement HCCA reads and writes

---
 src/include/86box/usb.h | 4 ++--
 src/usb.c               | 5 +++++
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/include/86box/usb.h b/src/include/86box/usb.h
index 6582f05e4..d8101c880 100644
--- a/src/include/86box/usb.h
+++ b/src/include/86box/usb.h
@@ -58,6 +58,7 @@ typedef struct usb_t
 } usb_t;
 
 #pragma pack(push, 1)
+
 /* Base USB descriptor struct. */
 typedef struct
 {
@@ -76,6 +77,7 @@ typedef struct
     uint8_t  bmAttributes;
     uint8_t  bMaxPower;
 } usb_desc_conf_t;
+
 #pragma pack(pop)
 
 typedef struct
@@ -84,9 +86,7 @@ typedef struct
     uint16_t HccaFrameNumber;
     uint16_t HccaPad1;
     uint32_t HccaDoneHead;
-    uint32_t Reserved[29];
 } usb_hcca_t;
-
 /* USB endpoint device struct. Incomplete and unused. */
 typedef struct
 {
diff --git a/src/usb.c b/src/usb.c
index 5b5e68bf2..0b3b5efe1 100644
--- a/src/usb.c
+++ b/src/usb.c
@@ -300,8 +300,13 @@ ohci_set_interrupt(usb_t *dev, uint8_t bit)
 void
 ohci_end_of_frame(usb_t* dev)
 {
+    usb_hcca_t hcca;
     /* TODO: Put endpoint and transfer descriptor processing here. */
+    dma_bm_read(dev->ohci_mmio[OHCI_HcHCCA].l, (uint8_t*)&hcca, sizeof(usb_hcca_t), 4);
+
     dev->ohci_mmio[OHCI_HcFmNumber].w[0]++;
+
+    dma_bm_write(dev->ohci_mmio[OHCI_HcHCCA].l, (uint8_t*)&hcca, sizeof(usb_hcca_t), 4);
 }
 
 void