[U-Boot] [PATCH] post: new parallel nor flash test

[Mike Frysinger]

This adds a simple parallel nor flash test to automatically verify
erasing/writing/reading of sectors.  The code is based on existing
Blackfin tests but generalized for everyone to use.

Signed-off-by: Mike Frysinger <vapier at gentoo.org>
---
 include/post.h        |    1 +
 post/drivers/Makefile |    2 +-
 post/drivers/flash.c  |   96 +++++++++++++++++++++++++++++++++++++++++++++++++
 post/tests.c          |   15 +++++++-
 4 files changed, 112 insertions(+), 2 deletions(-)
 create mode 100644 post/drivers/flash.c

diff --git a/include/post.h b/include/post.h
index c9ec2f4..19991de 100644
--- a/include/post.h
+++ b/include/post.h
@@ -186,6 +186,7 @@ extern int post_hotkeys_pressed(void);
 #define CONFIG_SYS_POST_BSPEC5		0x00100000
 #define CONFIG_SYS_POST_CODEC		0x00200000
 #define CONFIG_SYS_POST_COPROC		0x00400000
+#define CONFIG_SYS_POST_FLASH		0x00800000
 
 #endif /* CONFIG_POST */
 
diff --git a/post/drivers/Makefile b/post/drivers/Makefile
index 0d87ae0..85d6c03 100644
--- a/post/drivers/Makefile
+++ b/post/drivers/Makefile
@@ -24,6 +24,6 @@ include $(TOPDIR)/config.mk
 
 LIB	= libpostdrivers.o
 
-COBJS-$(CONFIG_HAS_POST)	+= i2c.o memory.o rtc.o
+COBJS-$(CONFIG_HAS_POST)	+= flash.o i2c.o memory.o rtc.o
 
 include $(TOPDIR)/post/rules.mk
diff --git a/post/drivers/flash.c b/post/drivers/flash.c
new file mode 100644
index 0000000..5ecb853
--- /dev/null
+++ b/post/drivers/flash.c
@@ -0,0 +1,96 @@
+/*
+ * Parallel NOR Flash tests
+ *
+ * Copyright (c) 2005-2011 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <common.h>
+#include <post.h>
+#include <flash.h>
+
+#if CONFIG_POST & CONFIG_SYS_POST_FLASH
+
+/*
+ * This code will walk over the declared sectors erasing them,
+ * then programming them, then verifying the written contents.
+ * Possible future work:
+ *  - verify sectors before/after are not erased/written
+ *  - verify partial writes (e.g. programming only middle of sector)
+ *  - verify the contents of the erased sector
+ *  - better seed pattern than 0x00..0xff
+ */
+
+#ifndef CONFIG_SYS_POST_FLASH_NUM
+# define CONFIG_SYS_POST_FLASH_NUM 0
+#endif
+#if CONFIG_SYS_POST_FLASH_START >= CONFIG_SYS_POST_FLASH_END
+# error "invalid flash block start/end"
+#endif
+
+extern flash_info_t flash_info[];
+
+static void *seed_src_data(ulong *old_len, ulong new_len)
+{
+	unsigned char *ret = (void *)CONFIG_SYS_SDRAM_BASE;
+	ulong i;
+
+	for (i = *old_len; i < new_len; ++i)
+		ret[i] = i;
+
+	*old_len = new_len;
+
+	return ret;
+}
+
+int flash_post_test(int flags)
+{
+	ulong len;
+	void *src;
+	int ret, n, n_start, n_end;
+	flash_info_t *info;
+
+	/* the output from the common flash layers needs help */
+	puts("\n");
+
+	len = 0;
+	info = &flash_info[CONFIG_SYS_POST_FLASH_NUM];
+	n_start = CONFIG_SYS_POST_FLASH_START;
+	n_end = CONFIG_SYS_POST_FLASH_END;
+
+	for (n = n_start; n < n_end; ++n) {
+		ulong s_start, s_len, s_off;
+
+		s_start = info->start[n];
+		s_len = flash_sector_size(info, n);
+		s_off = s_start - info->start[0];
+
+		src = seed_src_data(&len, s_len);
+
+		printf("\tsector %i: %#lx +%#lx",
+			n, s_start, s_len);
+
+		ret = flash_erase(info, n, n + 1);
+		if (ret) {
+			flash_perror(ret);
+			break;
+		}
+
+		ret = write_buff(info, src, s_start, s_len);
+		if (ret) {
+			flash_perror(ret);
+			break;
+		}
+
+		ret = memcmp(src, (void *)s_start, s_len);
+		if (ret) {
+			printf(" verify failed with %i\n", ret);
+			break;
+		}
+	}
+
+	return ret;
+}
+
+#endif
diff --git a/post/tests.c b/post/tests.c
index 71437b6..bfb9cb5 100644
--- a/post/tests.c
+++ b/post/tests.c
@@ -46,6 +46,7 @@ extern int sysmon_post_test (int flags);
 extern int dsp_post_test (int flags);
 extern int codec_post_test (int flags);
 extern int ecc_post_test (int flags);
+extern int flash_post_test(int flags);
 
 extern int dspic_init_post_test (int flags);
 extern int dspic_post_test (int flags);
@@ -301,7 +302,19 @@ struct post_test post_list[] =
 	NULL,
 	NULL,
 	CONFIG_SYS_POST_COPROC
-    }
+    },
+#endif
+#if CONFIG_POST & CONFIG_SYS_POST_FLASH
+    {
+	"Parallel NOR flash test",
+	"flash",
+	"This test verifies parallel flash operations.",
+	POST_RAM | POST_SLOWTEST | POST_MANUAL,
+	&flash_post_test,
+	NULL,
+	NULL,
+	CONFIG_SYS_POST_FLASH
+    },
 #endif
 };
 
-- 
1.7.5.rc3