From 80868e44ac7859b5f71adc2d34148ff1521b1950 Mon Sep 17 00:00:00 2001
From: Brian Swetland <swetland@playground.global>
Date: Wed, 5 Aug 2015 18:58:43 -0700
Subject: [app][mdebug] improve error reporting, enable reboot command

---
 app/mdebug/rswd.c      | 20 +++++++++++++-------
 app/mdebug/rswdp.h     |  7 +++++++
 app/mdebug/swd-m0sub.c |  8 +++++---
 3 files changed, 25 insertions(+), 10 deletions(-)

(limited to 'app')

diff --git a/app/mdebug/rswd.c b/app/mdebug/rswd.c
index 336b6e5e..94c75cef 100644
--- a/app/mdebug/rswd.c
+++ b/app/mdebug/rswd.c
@@ -21,6 +21,8 @@
 #include <stdlib.h>
 #include <printf.h>
 
+#include <platform.h>
+
 #include "swd.h"
 #include "rswdp.h"
 
@@ -56,6 +58,10 @@ static u8 optable[16] = {
 static const char *board_str = TARGET;
 static const char *build_str = "fw v0.9 (" __DATE__ ", " __TIME__ ")";
 
+static void _reboot(void) {
+	platform_halt(HALT_ACTION_REBOOT, HALT_REASON_SW_RESET);
+}
+
 /* TODO bounds checking -- we trust the host far too much */
 void process_txn(u32 txnid, u32 *rx, int rxc, u32 *tx) {
 	unsigned msg, op, n;
@@ -80,8 +86,8 @@ void process_txn(u32 txnid, u32 *rx, int rxc, u32 *tx) {
 		case CMD_SWD_WRITE:
 			while (n-- > 0) {
 				rxc--;
-				if (swd_write(optable[op], *rx++)) {
-					status = 3;
+				status = swd_write(optable[op], *rx++);
+				if (status) {
 					goto done;
 				}
 			}
@@ -89,11 +95,11 @@ void process_txn(u32 txnid, u32 *rx, int rxc, u32 *tx) {
 		case CMD_SWD_READ:
 			tx[txc++] = RSWD_MSG(CMD_SWD_DATA, 0, n);
 			while (n-- > 0) {
-				if (swd_read(optable[op], tx + txc)) {
+				status = swd_read(optable[op], tx + txc);
+				if (status) {
 					txc++;
 					while (n-- > 0)
 						tx[txc++] = 0xfefefefe;
-					status = 3;
 					goto done;
 				}
 				txc++;
@@ -102,8 +108,8 @@ void process_txn(u32 txnid, u32 *rx, int rxc, u32 *tx) {
 		case CMD_SWD_DISCARD:
 			while (n-- > 0) {
 				u32 tmp;
-				if (swd_read(optable[op], &tmp)) {
-					status = 3;
+				status = swd_read(optable[op], &tmp);
+				if (status) {
 					goto done;
 				}
 			}
@@ -132,7 +138,7 @@ void process_txn(u32 txnid, u32 *rx, int rxc, u32 *tx) {
 			swdp_trace = op;
 			continue;
 		case CMD_BOOTLOADER:
-			//func = reboot_bootloader;
+			func = _reboot;
 			continue;
 		case CMD_SET_CLOCK:
 			n = swd_set_clock(n);
diff --git a/app/mdebug/rswdp.h b/app/mdebug/rswdp.h
index 42ef81c6..a41e9e46 100644
--- a/app/mdebug/rswdp.h
+++ b/app/mdebug/rswdp.h
@@ -73,6 +73,13 @@
 #define CMD_RX_MAXDATA	0x33 /* arg=bytes, declares senders rx buffer size */
 #define CMD_CLOCK_KHZ	0x34 /* arg=khz, reports active clock rate */
 
+/* CMD_STATUS error codes */
+#define ERR_NONE	0
+#define ERR_INTERNAL	1
+#define ERR_TIMEOUT	2
+#define ERR_IO		3
+#define ERR_PARITY	4
+
 #define RSWD_VERSION	0x0100
 
 /* CMD_SWD_OP operations - combine for direct AP/DP io */
diff --git a/app/mdebug/swd-m0sub.c b/app/mdebug/swd-m0sub.c
index 20f9ab40..de3ec9d2 100644
--- a/app/mdebug/swd-m0sub.c
+++ b/app/mdebug/swd-m0sub.c
@@ -1,7 +1,7 @@
 /* swdp-m0sub.c
  *
  * Copyright 2015 Brian Swetland <swetland@frotz.net>
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -29,6 +29,8 @@
 #include <platform/lpc43xx-sgpio.h>
 #include <platform/lpc43xx-clocks.h>
 
+#include "rswdp.h"
+
 #define PIN_LED		PIN(1,1)
 #define PIN_RESET	PIN(2,5)
 #define PIN_RESET_TXEN	PIN(2,6)
@@ -116,7 +118,7 @@ void swd_init(void) {
 	writel((1 << 11) | (1 << 14) | (1 << 15), SGPIO_OEN);
 
 	writel(0, M4_TXEV);
-	writel(M0_SUB_RST, RESET_CTRL0);	
+	writel(M0_SUB_RST, RESET_CTRL0);
 	writel(0x18000000, M0SUB_ZEROMAP);
 	writel(0xffffffff, 0x18004000);
 	memcpy((void*) 0x18000000, zero_bin, sizeof(zero_bin));
@@ -152,7 +154,7 @@ int swd_read(unsigned hdr, unsigned *val) {
 	data = readl(COMM_ARG1);
 	p = readl(COMM_ARG2);
 	if (p != parity(data)) {
-		return 2;
+		return ERR_PARITY;
 	}
 	//printf("rd s=%d p=%d d=%08x\n", n, p, data);
 	*val = data;
-- 
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