ppc4xx: Big lwmon5 board support rework/update

This patch brings the lwmon5 board support up-to-date. Here a
summary of the changes:

lwmon5 board port related:
- GPIO's changed to control the LSB transmitter
- Reset USB PHY's upon power-up
- Enable CAN upon power-up
- USB init error workaround (errata CHIP_6)
- EBC: Enable burstmode and modify the timings for the GDC memory
- EBC: Speed up NOR flash timings

lwmon5 board POST related:
- Add FPGA memory test
- Add GDC memory test
- DSP POST reworked
- SYSMON POST: Fix handling of negative temperatures
- Add output for sysmon1 POST
- HW-watchdog min. time test reworked

Additionally some coding-style changes were done.

Signed-off-by: Sascha Laue <sascha.laue@liebherr.com>
Signed-off-by: Stefan Roese <sr@denx.de>

1 files changed, 263 insertions, 45 deletions

diff --git a/post/board/lwmon5/fpga.c b/post/board/lwmon5/fpga.c
index 2b84290..3067548 100644
--- a/post/board/lwmon5/fpga.c
+++ b/post/board/lwmon5/fpga.c
@@ -28,7 +28,7 @@
  */
 
 #include <post.h>
-
+#include <watchdog.h>
 #include <asm/io.h>
 
 DECLARE_GLOBAL_DATA_PTR;
@@ -38,18 +38,28 @@ DECLARE_GLOBAL_DATA_PTR;
 #define FPGA_RAM_START		0xC4200000
 #define FPGA_RAM_END		0xC4203FFF
 #define FPGA_STAT		0xC400000C
+#define FPGA_BUFFER		0x00800000
+#define FPGA_RAM_SIZE		(FPGA_RAM_END - FPGA_RAM_START + 1)
 
 #if CONFIG_POST & CONFIG_SYS_POST_BSPEC3
 
-/* Testpattern for fpga memorytest */
-static uint pattern[] = {
+const static unsigned long pattern[] = {
+	0xffffffff,
+	0xaaaaaaaa,
+	0xcccccccc,
+	0xf0f0f0f0,
+	0xff00ff00,
+	0xffff0000,
+	0x0000ffff,
+	0x00ff00ff,
+	0x0f0f0f0f,
+	0x33333333,
 	0x55555555,
-	0xAAAAAAAA,
-	0xAA5555AA,
-	0x55AAAA55,
-	0x0
+	0x00000000,
 };
 
+const static unsigned long otherpattern = 0x01234567;
+
 static int one_scratch_test(uint value)
 {
 	uint read_value;
@@ -62,51 +72,226 @@ static int one_scratch_test(uint value)
 	read_value = in_be32((void *)FPGA_SCRATCH_REG);
 	if (read_value != value) {
 		post_log("FPGA SCRATCH test failed write %08X, read %08X\n",
-			value, read_value);
-		ret = 1;
+			 value, read_value);
+		ret = -1;
+	}
+
+	return ret;
+}
+
+static int fpga_post_test1(ulong *start, ulong size, ulong val)
+{
+	int ret = 0;
+	ulong i = 0;
+	ulong *mem = start;
+	ulong readback;
+
+	for (i = 0; i < size / sizeof(ulong); i++) {
+		mem[i] = val;
+		if (i % 1024 == 0)
+			WATCHDOG_RESET();
+	}
+
+	for (i = 0; i < size / sizeof(ulong); i++) {
+		readback = mem[i];
+		if (readback != val) {
+			post_log("FPGA Memory error at %08x, "
+				 "wrote %08x, read %08x !\n",
+				 mem + i, val, readback);
+			ret = -1;
+			break;
+		}
+		if (i % 1024 == 0)
+			WATCHDOG_RESET();
+	}
+	return ret;
+}
+
+static int fpga_post_test2(ulong *start, ulong size)
+{
+	int ret = 0;
+	ulong i = 0;
+	ulong *mem = start;
+	ulong readback;
+
+	for (i = 0; i < size / sizeof(ulong); i++) {
+		mem[i] = 1 << (i % 32);
+		if (i % 1024 == 0)
+			WATCHDOG_RESET();
+	}
+
+	for (i = 0; i < size / sizeof(ulong); i++) {
+		readback = mem[i];
+		if (readback != 1 << (i % 32)) {
+			post_log("FPGA Memory error at %08x, "
+				 "wrote %08x, read %08x !\n",
+				 mem + i, 1 << (i % 32), readback);
+			ret = -1;
+			break;
+		}
+		if (i % 1024 == 0)
+			WATCHDOG_RESET();
+	}
+
+	return ret;
+}
+
+static int fpga_post_test3(ulong *start, ulong size)
+{
+	int ret = 0;
+	ulong i = 0;
+	ulong *mem = start;
+	ulong readback;
+
+	for (i = 0; i < size / sizeof(ulong); i++) {
+		mem[i] = i;
+		if (i % 1024 == 0)
+			WATCHDOG_RESET();
+	}
+
+	for (i = 0; i < size / sizeof(ulong); i++) {
+		readback = mem[i];
+		if (readback != i) {
+			post_log("FPGA Memory error at %08x, "
+				 "wrote %08x, read %08x !\n",
+				 mem + i, i, readback);
+			ret = -1;
+			break;
+		}
+		if (i % 1024 == 0)
+			WATCHDOG_RESET();
+	}
+
+	return ret;
+}
+
+static int fpga_post_test4(ulong *start, ulong size)
+{
+	int ret = 0;
+	ulong i = 0;
+	ulong *mem = start;
+	ulong readback;
+
+	for (i = 0; i < size / sizeof(ulong); i++) {
+		mem[i] = ~i;
+		if (i % 1024 == 0)
+			WATCHDOG_RESET();
+	}
+
+	for (i = 0; i < size / sizeof(ulong); i++) {
+		readback = mem[i];
+		if (readback != ~i) {
+			post_log("FPGA Memory error at %08x, "
+				 "wrote %08x, read %08x !\n",
+				 mem + i, ~i, readback);
+			ret = -1;
+			break;
+		}
+		if (i % 1024 == 0)
+			WATCHDOG_RESET();
 	}
 
 	return ret;
 }
 
 /* FPGA Memory-pattern-test */
-static int fpga_mem_test(void * address)
+static int fpga_mem_test(void)
 {
-	int ret = 1;
-	uint read_value;
-	uint old_value;
-	uint i = 0;
-	/* save content */
-	old_value = in_be32(address);
-
-	while (pattern[i] != 0) {
-		out_be32(address, pattern[i]);
-		/* read other location (protect against data lines capacity) */
-		ret = in_be16((void *)FPGA_VERSION_REG);
-		/* verify test pattern */
-		read_value = in_be32(address);
-
-		if (read_value != pattern[i]) {
-			post_log("FPGA Memory test failed.");
-			post_log(" write %08X, read %08X at address %08X\n",
-				pattern[i], read_value, address);
+	int ret = 0;
+	ulong* start = (ulong *)FPGA_RAM_START;
+	ulong  size  = FPGA_RAM_SIZE;
+
+	if (ret == 0)
+		ret = fpga_post_test1(start, size, 0x00000000);
+
+	if (ret == 0)
+		ret = fpga_post_test1(start, size, 0xffffffff);
+
+	if (ret == 0)
+		ret = fpga_post_test1(start, size, 0x55555555);
+
+	if (ret == 0)
+		ret = fpga_post_test1(start, size, 0xaaaaaaaa);
+
+	WATCHDOG_RESET();
+
+	if (ret == 0)
+		ret = fpga_post_test2(start, size);
+
+	if (ret == 0)
+		ret = fpga_post_test3(start, size);
+
+	if (ret == 0)
+		ret = fpga_post_test4(start, size);
+
+	return ret;
+}
+
+
+
+/* Verify FPGA addresslines */
+static int fpga_post_addrline(ulong *address, ulong *base, ulong size)
+{
+	unsigned long *target;
+	unsigned long *end;
+	unsigned long readback;
+	unsigned long xor;
+	int ret = 0;
+
+	end = (ulong *)((ulong)base + size);
+	xor = 0;
+
+	for (xor = sizeof(ulong); xor > 0; xor <<= 1) {
+		target = (ulong*)((ulong)address ^ xor);
+		if ((target >= base) && (target < end)) {
+			*address = ~*target;
+			readback = *target;
+
+			if (readback == *address) {
+				post_log("Memory (address line) error at %08x"
+					 "XOR value %08x !\n",
+					 address, target, xor);
+				ret = -1;
+				break;
+			}
+		}
+	}
+
+	return ret;
+}
+
+/* Verify FPGA addresslines */
+static int fpga_post_dataline(ulong *address)
+{
+	unsigned long temp32 = 0;
+	int i = 0;
+	int ret = 0;
+
+	for (i = 0; i < ARRAY_SIZE(pattern); i++) {
+		*address = pattern[i];
+		/*
+		 * Put a different pattern on the data lines: otherwise they
+		 * may float long enough to read back what we wrote.
+		 */
+		*(address + 1) = otherpattern;
+		temp32 = *address;
+
+		if (temp32 != pattern[i]){
+			post_log("Memory (date line) error at %08x, "
+				 "wrote %08x, read %08x !\n",
+				 address, pattern[i], temp32);
 			ret = 1;
-			goto out;
 		}
-		i++;
 	}
 
-	ret = 0;
-out:
-	out_be32(address, old_value);
 	return ret;
 }
+
 /* Verify FPGA, get version & memory size */
 int fpga_post_test(int flags)
 {
-	uint   address;
 	uint   old_value;
-	ushort version;
+	uint   version;
 	uint   read_value;
 	int    ret = 0;
 
@@ -120,24 +305,57 @@ int fpga_post_test(int flags)
 
 	out_be32((void *)FPGA_SCRATCH_REG, old_value);
 
-	version = in_be16((void *)FPGA_VERSION_REG);
-	post_log("FPGA : version %u.%u\n",
-		(version >> 8) & 0xFF, version & 0xFF);
+	version = in_be32((void *)FPGA_VERSION_REG);
+	post_log("FPGA version %u.%u\n",
+		 (version >> 8) & 0xFF, version & 0xFF);
 
 	/* Enable write to FPGA RAM */
 	out_be32((void *)FPGA_STAT, in_be32((void *)FPGA_STAT) | 0x1000);
 
-	read_value = get_ram_size((void *)CONFIG_SYS_FPGA_BASE_1, 0x4000);
-	post_log("FPGA RAM size: %d bytes\n", read_value);
+	/* get RAM size */
+	read_value = get_ram_size((void *)CONFIG_SYS_FPGA_BASE_1, FPGA_RAM_SIZE);
+	post_log("FPGA RAM size %d bytes\n", read_value);
+	WATCHDOG_RESET();
 
-	for (address = 0; address < 0x1000; address++) {
-		if (fpga_mem_test((void *)(FPGA_RAM_START + 4*address)) == 1) {
-			ret = 1;
-			goto out;
-		}
+	/* copy fpga memory to DDR2 RAM*/
+	memcpy((void *)FPGA_BUFFER,(void *)FPGA_RAM_START, FPGA_RAM_SIZE);
+	WATCHDOG_RESET();
+
+	/* Test datalines */
+	if (fpga_post_dataline((ulong *)FPGA_RAM_START)) {
+		ret = 1;
+		goto out;
+	}
+	WATCHDOG_RESET();
+
+	/* Test addresslines */
+	if (fpga_post_addrline((ulong *)FPGA_RAM_START,
+			       (ulong *)FPGA_RAM_START, FPGA_RAM_SIZE)) {
+		ret = 1;
+		goto out;
 	}
+	WATCHDOG_RESET();
+	if (fpga_post_addrline((ulong *)FPGA_RAM_END - sizeof(long),
+			       (ulong *)FPGA_RAM_START, FPGA_RAM_SIZE)) {
+		ret = 1;
+		goto out;
+	}
+	WATCHDOG_RESET();
+
+	/* Memory Pattern Test */
+	if (fpga_mem_test()) {
+		ret = 1;
+		goto out;
+	}
+	WATCHDOG_RESET();
+
+	/* restore memory */
+	memcpy((void *)FPGA_RAM_START,(void *)FPGA_BUFFER, FPGA_RAM_SIZE);
+	WATCHDOG_RESET();
 
 out:
+	/* Disable write to RAM */
+	out_be32((void *)FPGA_STAT, in_be32((void *)FPGA_STAT) & 0xEFFF);
 	return ret;
 }