From 9ceb7ca646a8a0b8ae7885a93ee2ad7f89cd88c6 Mon Sep 17 00:00:00 2001
From: Tomasz Kramkowski <tk@kyriasis.com>
Date: Tue, 28 Mar 2017 16:13:02 +0100
Subject: usb: Extra debug / error handling.

---
 usb/usb.c | 32 +++++++++++++++++++++++++++-----
 1 file changed, 27 insertions(+), 5 deletions(-)

(limited to 'usb')

diff --git a/usb/usb.c b/usb/usb.c
index c37fc5f..977e7a5 100644
--- a/usb/usb.c
+++ b/usb/usb.c
@@ -41,7 +41,8 @@ void usb_setup(void)
 	/* Initial Configuration */
 	SET_MASKED(USB0_USBCTRL, BV(USBCTRL_SUSP) | BV(USBCTRL_PDE), 0);
 	SET_BIT(USB0_CONTROL, CONTROL_DPPULLUPNONOTG);
-	SET_BIT(USB0_INTEN, INTEN_USBRSTEN);
+	USB0_INTEN = BV(INTEN_STALLEN) | BV(INTEN_RESUMEEN) |
+		BV(INTEN_SLEEPEN) | BV(INTEN_ERROREN) | BV(INTEN_USBRSTEN);
 
 	/* NVIC Enable interrupt */
 	ISR_CLRPEND(73);
@@ -81,13 +82,34 @@ void usb_isr(void)
 {
 	uint8_t stat = USB0_ISTAT;
 
-	if (IS_BIT_SET(stat, ISTAT_TOKDNE)) {
-		uart_puts("tokdne");
+	if (GET_BIT(stat, ISTAT_STALL)) {
+		uart_puts("INT: stall");
+		USB0_ISTAT = BV(ISTAT_STALL);
+	}
+	if (GET_BIT(stat, ISTAT_RESUME)) {
+		uart_puts("INT: resume");
+		USB0_ISTAT = BV(ISTAT_RESUME);
+	}
+	if (GET_BIT(stat, ISTAT_SLEEP)) {
+		uart_puts("INT: sleep");
+		USB0_ISTAT = BV(ISTAT_SLEEP);
+	}
+	if (GET_BIT(stat, ISTAT_TOKDNE)) {
+		uart_puts("INT: tokdne");
 		i_tokdne();
 		USB0_ISTAT = BV(ISTAT_TOKDNE);
 	}
-	if (IS_BIT_SET(stat, ISTAT_USBRST)) {
-		uart_puts("usbrst");
+	if (GET_BIT(stat, ISTAT_SOFTOK)) {
+		/*uart_puts("INT: softok");*/
+		USB0_ISTAT = BV(ISTAT_SOFTOK);
+	}
+	if (GET_BIT(stat, ISTAT_ERROR)) {
+		uart_printf("INT: error (0x%x)\n", (unsigned)USB0_ERRSTAT);
+		USB0_ERRSTAT = USB0_ERRSTAT;
+		USB0_ISTAT = BV(ISTAT_ERROR);
+	}
+	if (GET_BIT(stat, ISTAT_USBRST)) {
+		uart_puts("INT: usbrst");
 		i_usbrst();
 		USB0_ISTAT = BV(ISTAT_USBRST);
 	}
-- 
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