From 9bc94963aefcb5028c3529ff59c974e48d814690 Mon Sep 17 00:00:00 2001
From: Christian Cunningham <cc@localhost>
Date: Thu, 23 Dec 2021 21:42:32 -0800
Subject: Intro USB

---
 src/sys/core.c | 41 +++++++++++++++++++++++++++++++++++++++--
 1 file changed, 39 insertions(+), 2 deletions(-)

(limited to 'src/sys/core.c')

diff --git a/src/sys/core.c b/src/sys/core.c
index ed88570..3f2d117 100644
--- a/src/sys/core.c
+++ b/src/sys/core.c
@@ -1,5 +1,6 @@
 #include "../cpu/irq.h"
 #include "../drivers/uart.h"
+#include "../drivers/usb.h"
 #include "../graphics/lfb.h"
 #include "../graphics/drawer.h"
 #include "../lib/mem.h"
@@ -18,14 +19,44 @@ char* os_info_v = VERSION;
 
 // Initialize IRQs
 void sysinit() {
+	// Route GPU interrupts to Core 0
+	store32(0x00, GPU_INTERRUPTS_ROUTING);
+
 	// Mask Overrun of UART0
 	store32(1<<4, UART0_IMSC);
 
 	// Enable UART GPU IRQ
 	store32(1<<25, IRQ_ENABLE2);
 
-	// Route GPU interrupts to Core 0
-	store32(0x00, GPU_INTERRUPTS_ROUTING);
+	// Enable USB Interrupt
+	store32(1<<9, IRQ_ENABLE1);
+	// USB Host power on
+	// HPRT.PrtPwr = 1'b1 -> HPRT.PrtRst = 1'b1 -> wait 60msec -> HPRT.PrtRst = 1'b0
+	*USB_HOST_HPRT |= 1 << 12;
+	*USB_HOST_HPRT |= 1 << 8;
+	delay(0x100000);
+	*USB_HOST_HPRT &= ~(1 << 8);
+	
+	// enable irq
+	// GAHBCFG.GlblIntrMsk = 1'b1
+	// GINTMSK.ConIDStsChngMsk = 1'b1, GINTMSK.PrtIntMsk = 1'b1, GINTMSK.SofMsk = 1'b1
+	*USB_CORE_GAHBCFG   |= 1;
+	*USB_CORE_GINTMSK    =  1 << 28 | 1 << 24 | 0 << 3;
+	
+	// port enable and retry detect
+	// HPRT.PrtPwr = 1'b1, HPRT.PrtEnChng = 1'b1, HPRT.PrtConnDet = 1'b1
+	*USB_HOST_HPRT = 1 << 12 | 1 << 3 | 1 << 1; 
+	
+	// enable channel irq
+	// HAINTMASK.HAINTMsk = 16'h3
+	// HCINTMSK0.XferComplMsk = 1'b1
+	*USB_HOST_HAINTMSK   |= 0x3;
+	*USB_HOST_HCINTMSK0  |= 1;
+	*USB_HOST_HCINTMSK1  |= 1;
+	
+	// HCCAR1.EPDir = 1'b0 (OUT) / 1'b01(IN), HCCAR1.MPS = 11'h40
+	*USB_HOST_HCCHAR0   |= 0x40;            // OUT
+	*USB_HOST_HCCHAR1   |= 1 << 15 | 0x40;  // IN
 
 	// Enable Timer
 	// As an IRQ
@@ -128,4 +159,10 @@ void postinit() {
 	}
 
 	write_string(&g_Drawer, "\n> ");
+
+	send_packet();
+	for (int i = 0; i < 18; i++) {
+		uart_hex(usb_buffer1[i]);
+		uart_char('\n');
+	}
 }
-- 
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