lib: Add hexdump

Often during debugging session it's very interesting to see
what data we were dealing with. For example what we write or read
to/from memory or peripherals.

This change introduces functions that allow to dump binary
data with one simple function invocation like:
------------------->8----------------
print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, buf, len);
------------------->8----------------

which gives us the following:
------------------->8----------------
00000000: f2 b7 c9 88 62 61 75 64 72 61 74 65 3d 31 31 35  ....baudrate=115
00000010: 32 30 30 00 62 6f 6f 74 61 72 67 73 3d 63 6f 6e  200.bootargs=con
00000020: 73 6f 6c 65 3d 74 74 79 53 33 2c 31 31 35 32 30  sole=ttyS3,11520
00000030: 30 6e 38 00 62 6f 6f 74 64 65 6c 61 79 3d 33 00  0n8.bootdelay=3.
00000040: 62 6f 6f 74 66 69 6c 65 3d 75 49 6d 61 67 65 00  bootfile=uImage.
00000050: 66 64 74 63 6f 6e 74 72 6f 6c 61 64 64 72 3d 39  fdtcontroladdr=9
00000060: 66 66 62 31 62 61 30 00 6c 6f 61 64 61 64 64 72  ffb1ba0.loadaddr
00000070: 3d 30 78 38 32 30 30 30 30 30 30 00 73 74 64 65  =0x82000000.stde
00000080: 72 72 3d 73 65 72 69 61 6c 30 40 65 30 30 32 32  rr=serial0@e0022
00000090: 30 30 30 00 73 74 64 69 6e 3d 73 65 72 69 61 6c  000.stdin=serial
000000a0: 30 40 65 30 30 32 32 30 30 30 00 73 74 64 6f 75  0@e0022000.stdou
000000b0: 74 3d 73 65 72 69 61 6c 30 40 65 30 30 32 32 30  t=serial0@e00220
000000c0: 30 30 00 00 00 00 00 00 00 00 00 00 00 00 00 00  00..............
...
------------------->8----------------

Source of hexdump.c was copied from Linux kernel v4.7-rc2.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Mario Six <mario.six@gdsys.cc>
Cc: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@konsulko.com>
Cc: Stefan Roese <sr@denx.de>

4 files changed, 13 insertions, 9 deletions

diff --git a/drivers/mtd/ubi/attach.c b/drivers/mtd/ubi/attach.c
index ba40e58e51..b4ba339c80 100644
--- a/drivers/mtd/ubi/attach.c
+++ b/drivers/mtd/ubi/attach.c
@@ -789,7 +789,7 @@ static int check_corruption(struct ubi_device *ubi, struct ubi_vid_hdr *vid_hdr,
 	ubi_dump_vid_hdr(vid_hdr);
 	pr_err("hexdump of PEB %d offset %d, length %d",
 	       pnum, ubi->leb_start, ubi->leb_size);
-	ubi_dbg_print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1,
+	ubi_dbg_print_hex_dump("", DUMP_PREFIX_OFFSET, 32, 1,
 			       ubi->peb_buf, ubi->leb_size, 1);
 	err = 1;
 
diff --git a/drivers/mtd/ubi/debug.c b/drivers/mtd/ubi/debug.c
index 412ea9f6f5..0a7427522c 100644
--- a/drivers/mtd/ubi/debug.c
+++ b/drivers/mtd/ubi/debug.c
@@ -5,6 +5,7 @@
  * Author: Artem Bityutskiy (Битюцкий Артём)
  */
 
+#include <hexdump.h>
 #include <ubi_uboot.h>
 #include "ubi.h"
 #ifndef __UBOOT__
@@ -39,7 +40,7 @@ void ubi_dump_flash(struct ubi_device *ubi, int pnum, int offset, int len)
 
 	ubi_msg(ubi, "dumping %d bytes of data from PEB %d, offset %d",
 		len, pnum, offset);
-	print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1, buf, len, 1);
+	print_hex_dump("", DUMP_PREFIX_OFFSET, 32, 1, buf, len, 1);
 out:
 	vfree(buf);
 	return;
@@ -60,7 +61,7 @@ void ubi_dump_ec_hdr(const struct ubi_ec_hdr *ec_hdr)
 	pr_err("\timage_seq      %d\n", be32_to_cpu(ec_hdr->image_seq));
 	pr_err("\thdr_crc        %#08x\n", be32_to_cpu(ec_hdr->hdr_crc));
 	pr_err("erase counter header hexdump:\n");
-	print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1,
+	print_hex_dump("", DUMP_PREFIX_OFFSET, 32, 1,
 		       ec_hdr, UBI_EC_HDR_SIZE, 1);
 }
 
@@ -85,7 +86,7 @@ void ubi_dump_vid_hdr(const struct ubi_vid_hdr *vid_hdr)
 		(unsigned long long)be64_to_cpu(vid_hdr->sqnum));
 	pr_err("\thdr_crc   %08x\n", be32_to_cpu(vid_hdr->hdr_crc));
 	pr_err("Volume identifier header hexdump:\n");
-	print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1,
+	print_hex_dump("", DUMP_PREFIX_OFFSET, 32, 1,
 		       vid_hdr, UBI_VID_HDR_SIZE, 1);
 }
 
diff --git a/drivers/mtd/ubi/debug.h b/drivers/mtd/ubi/debug.h
index 9b10fb9412..8ad0c62733 100644
--- a/drivers/mtd/ubi/debug.h
+++ b/drivers/mtd/ubi/debug.h
@@ -16,6 +16,8 @@ void ubi_dump_vid_hdr(const struct ubi_vid_hdr *vid_hdr);
 #include <linux/random.h>
 #endif
 
+#include <hexdump.h>
+
 #define ubi_assert(expr)  do {                                               \
 	if (unlikely(!(expr))) {                                             \
 		pr_crit("UBI assert failed in %s at %u (pid %d)\n",          \
@@ -24,8 +26,8 @@ void ubi_dump_vid_hdr(const struct ubi_vid_hdr *vid_hdr);
 	}                                                                    \
 } while (0)
 
-#define ubi_dbg_print_hex_dump(l, ps, pt, r, g, b, len, a)                   \
-		print_hex_dump(l, ps, pt, r, g, b, len, a)
+#define ubi_dbg_print_hex_dump(ps, pt, r, g, b, len, a)                      \
+		print_hex_dump(ps, pt, r, g, b, len, a)
 
 #define ubi_dbg_msg(type, fmt, ...) \
 	pr_debug("UBI DBG " type " (pid %d): " fmt "\n", current->pid,       \
diff --git a/drivers/mtd/ubi/io.c b/drivers/mtd/ubi/io.c
index fc0a61fa79..8ef7823b37 100644
--- a/drivers/mtd/ubi/io.c
+++ b/drivers/mtd/ubi/io.c
@@ -78,6 +78,7 @@
 #include <linux/err.h>
 #include <linux/slab.h>
 #else
+#include <hexdump.h>
 #include <ubi_uboot.h>
 #endif
 
@@ -1353,11 +1354,11 @@ static int self_check_write(struct ubi_device *ubi, const void *buf, int pnum,
 		ubi_msg(ubi, "data differ at position %d", i);
 		ubi_msg(ubi, "hex dump of the original buffer from %d to %d",
 			i, i + dump_len);
-		print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1,
+		print_hex_dump("", DUMP_PREFIX_OFFSET, 32, 1,
 			       buf + i, dump_len, 1);
 		ubi_msg(ubi, "hex dump of the read buffer from %d to %d",
 			i, i + dump_len);
-		print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1,
+		print_hex_dump("", DUMP_PREFIX_OFFSET, 32, 1,
 			       buf1 + i, dump_len, 1);
 		dump_stack();
 		err = -EINVAL;
@@ -1419,7 +1420,7 @@ int ubi_self_check_all_ff(struct ubi_device *ubi, int pnum, int offset, int len)
 fail:
 	ubi_err(ubi, "self-check failed for PEB %d", pnum);
 	ubi_msg(ubi, "hex dump of the %d-%d region", offset, offset + len);
-	print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1, buf, len, 1);
+	print_hex_dump("", DUMP_PREFIX_OFFSET, 32, 1, buf, len, 1);
 	err = -EINVAL;
 error:
 	dump_stack();