[PATCH 1/4] kwbimage_v0: add support to detect and boot a mvebu v0 image

[PATCH 1/4] kwbimage_v0: add support to detect and boot a mvebu v0 image

[Uwe Kleine-König]

The differences between v0 and v1 of the mvebu kwbimage are small enough
that the function to boot such an image can be shared between both
variants.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
 arch/arm/mach-mvebu/kwbootimage.c | 11 +++++++++--
 common/filetype.c                 | 22 +++++++++++++++++-----
 include/filetype.h                |  1 +
 3 files changed, 27 insertions(+), 7 deletions(-)

diff --git a/arch/arm/mach-mvebu/kwbootimage.c b/arch/arm/mach-mvebu/kwbootimage.c
index 8d364ceb7b31..e379d732fed6 100644
--- a/arch/arm/mach-mvebu/kwbootimage.c
+++ b/arch/arm/mach-mvebu/kwbootimage.c
@@ -10,7 +10,7 @@
 #include <asm/unaligned.h>
 #include <mach/common.h>
 
-static int do_bootm_kwbimage_v1(struct image_data *data)
+static int do_bootm_kwbimage_v0_v1(struct image_data *data)
 {
 	int fd, ret;
 	loff_t offset;
@@ -69,14 +69,21 @@ out_free:
 	return ret;
 }
 
+static struct image_handler image_handler_kwbimage_v0_handler = {
+	.name = "MVEBU kwbimage v0",
+	.bootm = do_bootm_kwbimage_v0_v1,
+	.filetype = filetype_kwbimage_v0,
+};
+
 static struct image_handler image_handler_kwbimage_v1_handler = {
 	.name = "MVEBU kwbimage v1",
-	.bootm = do_bootm_kwbimage_v1,
+	.bootm = do_bootm_kwbimage_v0_v1,
 	.filetype = filetype_kwbimage_v1,
 };
 
 static int mvebu_register_kwbimage_image_handler(void)
 {
+	register_image_handler(&image_handler_kwbimage_v0_handler);
 	register_image_handler(&image_handler_kwbimage_v1_handler);
 
 	return 0;
diff --git a/common/filetype.c b/common/filetype.c
index 444ec14cc4b6..bb807df721d9 100644
--- a/common/filetype.c
+++ b/common/filetype.c
@@ -65,7 +65,8 @@ static const struct filetype_str filetype_str[] = {
 	[filetype_exe] = { "MS-DOS executable", "exe" },
 	[filetype_mxs_bootstream] = { "Freescale MXS bootstream", "mxsbs" },
 	[filetype_socfpga_xload] = { "SoCFPGA prebootloader image", "socfpga-xload" },
-	[filetype_kwbimage_v1] = { "MVEBU kwbimage (v1)", "kwb" },
+	[filetype_kwbimage_v0] = { "MVEBU kwbimage (v0)", "kwb0" },
+	[filetype_kwbimage_v1] = { "MVEBU kwbimage (v1)", "kwb1" },
 	[filetype_android_sparse] = { "Android sparse image", "sparse" },
 	[filetype_arm64_linux_image] = { "ARM aarch64 Linux image", "aarch64-linux" },
 };
@@ -302,10 +303,21 @@ enum filetype file_detect_type(const void *_buf, size_t bufsize)
 	if ((buf8[0] == 0x5a || buf8[0] == 0x69 || buf8[0] == 0x78 ||
 	     buf8[0] == 0x8b || buf8[0] == 0x9c) &&
 	    buf8[0x1] == 0 && buf8[0x2] == 0 && buf8[0x3] == 0 &&
-	    buf8[0x8] == 1 && buf8[0x18] == 0 && buf8[0x1b] == 0 &&
-	    buf8[0x1c] == 0 && buf8[0x1d] == 0 &&
-	    (buf8[0x1e] == 0 || buf8[0x1e] == 1))
-		return filetype_kwbimage_v1;
+	    buf8[0x18] == 0 && buf8[0x1b] == 0 && buf8[0x1c] == 0) {
+		unsigned char sum = 0;
+		int i;
+
+		for (i = 0; i <= 0x1e; ++i)
+			sum += buf8[i];
+
+		if (sum == buf8[0x1f] && buf8[0x8] == 0)
+			return filetype_kwbimage_v0;
+
+		if (sum == buf8[0x1f] &&
+		    buf8[0x8] == 1 && buf8[0x1d] == 0 &&
+		    (buf8[0x1e] == 0 || buf8[0x1e] == 1))
+			return filetype_kwbimage_v1;
+	}
 
 	if (is_sparse_image(_buf))
 		return filetype_android_sparse;
diff --git a/include/filetype.h b/include/filetype.h
index 9986938ddb7c..d9963a24496c 100644
--- a/include/filetype.h
+++ b/include/filetype.h
@@ -38,6 +38,7 @@ enum filetype {
 	filetype_xz_compressed,
 	filetype_mxs_bootstream,
 	filetype_socfpga_xload,
+	filetype_kwbimage_v0,
 	filetype_kwbimage_v1,
 	filetype_android_sparse,
 	filetype_arm64_linux_image,
-- 
2.17.0


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[PATCH 2/4] libfile: implement new helper write_file_flash()

[Uwe Kleine-König]

Compared to write_file() this new function also calls erase() to be
suitable for flash devices.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
 include/libfile.h |  1 +
 lib/libfile.c     | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/include/libfile.h b/include/libfile.h
index fd2fadeaa81a..2c5eef71f169 100644
--- a/include/libfile.h
+++ b/include/libfile.h
@@ -12,6 +12,7 @@ int read_file_2(const char *filename, size_t *size, void **outbuf,
 		loff_t max_size);
 
 int write_file(const char *filename, const void *buf, size_t size);
+int write_file_flash(const char *filename, const void *buf, size_t size);
 
 int copy_file(const char *src, const char *dst, int verbose);
 
diff --git a/lib/libfile.c b/lib/libfile.c
index b7db22d6940a..2d4335db7dbd 100644
--- a/lib/libfile.c
+++ b/lib/libfile.c
@@ -250,6 +250,39 @@ int write_file(const char *filename, const void *buf, size_t size)
 }
 EXPORT_SYMBOL(write_file);
 
+/**
+ * write_file_flash - write a buffer to a file backed by flash
+ * @filename:    The filename to write
+ * @size:        The size of the buffer
+ *
+ * Functional this is identical to write_file but calls erase() before writing.
+ *
+ * Return: 0 for success or negative error value
+ */
+int write_file_flash(const char *filename, const void *buf, size_t size)
+{
+	int fd, ret;
+
+	fd = open(filename, O_WRONLY | O_TRUNC | O_CREAT);
+	if (fd < 0)
+		return fd;
+
+	ret = erase(fd, size, 0);
+	if (ret < 0)
+		goto out_close;
+
+	ret = write_full(fd, buf, size);
+
+out_close:
+	close(fd);
+
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+EXPORT_SYMBOL(write_file_flash);
+
 /**
  * copy_file - Copy a file
  * @src:	The source filename
-- 
2.17.0


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[PATCH 3/4] omap/am33xx_bbu: use file_write_flash() instead of its own variant

[Uwe Kleine-König]

There are two differences between file_write_flash() and write_image()
(which is removed in this patch):

 - file_write_flash() uses write_full() vs. write() in write_image()
 - file_write_flash() doesn't erase the whole device but only the needed
   space

So the new code should be more robust and maybe even faster.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
 arch/arm/mach-omap/am33xx_bbu_nand.c | 37 ++--------------------------
 1 file changed, 2 insertions(+), 35 deletions(-)

diff --git a/arch/arm/mach-omap/am33xx_bbu_nand.c b/arch/arm/mach-omap/am33xx_bbu_nand.c
index 7785d40f1f25..9ee483855e42 100644
--- a/arch/arm/mach-omap/am33xx_bbu_nand.c
+++ b/arch/arm/mach-omap/am33xx_bbu_nand.c
@@ -28,39 +28,6 @@ struct nand_bbu_handler {
 	int num_devicefiles;
 };
 
-static int write_image(const char *devfile, const void *image, size_t size)
-{
-	int fd = 0;
-	int ret = 0;
-
-	fd = open(devfile, O_WRONLY);
-	if (fd < 0) {
-		pr_err("could not open %s: %s\n", devfile,
-			errno_str());
-		return fd;
-	}
-
-	ret = erase(fd, ERASE_SIZE_ALL, 0);
-	if (ret < 0) {
-		pr_err("could not erase %s: %s\n", devfile,
-			errno_str());
-		close(fd);
-		return ret;
-	}
-
-	ret = write(fd, image, size);
-	if (ret < 0) {
-		pr_err("could not write to fd %s: %s\n", devfile,
-			errno_str());
-		close(fd);
-		return ret;
-	}
-
-	close(fd);
-
-	return 0;
-}
-
 /*
  * Upate given nand partitions with an image
  */
@@ -80,12 +47,12 @@ static int nand_slot_update_handler(struct bbu_handler *handler,
 
 	/* check if the devicefile has been overwritten */
 	if (strcmp(data->devicefile, nh->devicefile[0]) != 0) {
-		ret = write_image(data->devicefile, image, size);
+		ret = write_file_flash(data->devicefile, image, size);
 		if (ret != 0)
 			return ret;
 	} else {
 		for (i = 0; i < nh->num_devicefiles; i++) {
-			ret =  write_image(nh->devicefile[i], image, size);
+			ret =  write_file_flash(nh->devicefile[i], image, size);
 			if (ret != 0)
 				return ret;
 		}
-- 
2.17.0


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[PATCH 4/4] scripts/kwboot: fix image check for v0 images

[Uwe Kleine-König]

Since kwboot checks the contents of the file to send it only works for
v1 images (or with -f). Extend the check to know about v0 images, too.

Fixes: 39ebd7e73bec ("kwboot: do a filetype check before sending the image")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
 scripts/kwboot.c | 63 ++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 53 insertions(+), 10 deletions(-)

diff --git a/scripts/kwboot.c b/scripts/kwboot.c
index db177ceb5f2e..df52144e45c4 100644
--- a/scripts/kwboot.c
+++ b/scripts/kwboot.c
@@ -602,12 +602,24 @@ out:
 	return rc;
 }
 
+static unsigned char crc(const unsigned char *img, size_t len)
+{
+	unsigned char ret = 0;
+	size_t i;
+
+	for (i = 0; i < len; ++i)
+		ret += img[i];
+
+	return ret;
+}
+
 static int
 kwboot_check_image(unsigned char *img, size_t size)
 {
 	size_t i;
 	size_t header_size, image_size, image_offset;
 	unsigned char csum = 0;
+	unsigned char imgversion;
 
 	if (size < 0x20) {
 		fprintf(stderr,
@@ -636,7 +648,8 @@ kwboot_check_image(unsigned char *img, size_t size)
 			return 1;
 	}
 
-	if (img[0x8] != 1) {
+	imgversion = img[0x8];
+	if (imgversion > 1) {
 		fprintf(stderr, "Unknown version: 0x%hhx\n", img[0x8]);
 		return 1;
 	}
@@ -646,7 +659,15 @@ kwboot_check_image(unsigned char *img, size_t size)
 	image_offset = img[0xc] | (img[0xd] << 8) |
 		(img[0xe] << 16) | (img[0xf] << 24);
 
-	header_size = (img[0x9] << 16) | img[0xa] | (img[0xb] << 8);
+	if (imgversion == 0) {
+		/* Image format 0 */
+		header_size =
+			img[0x1e] * 0x200 /* header extensions */ +
+			img[0x1d] * 0x800 /* binary header extensions */;
+	} else {
+		/* Image format 1 */
+		header_size = (img[0x9] << 16) | img[0xa] | (img[0xb] << 8);
+	}
 
 	if (header_size > image_offset) {
 		fprintf(stderr, "Header (%zu) expands over image start (%zu)\n",
@@ -660,16 +681,38 @@ kwboot_check_image(unsigned char *img, size_t size)
 		return 1;
 	}
 
-	for (i = 0; i < header_size; ++i)
-		csum += img[i];
 
-	csum -= img[0x1f];
+	if (imgversion == 0) {
+		/* check Main Header */
+		csum = crc(img, 0x1f);
+		if (csum != img[0x1f]) {
+			fprintf(stderr,
+				"Main Header checksum mismatch: specified: 0x%02hhx, calculated: 0x%02hhx\n",
+				img[0x1f], csum);
+			return 1;
+		}
+
+		/* check Header Extensions */
+		for (i = 0; i < img[0x1e]; ++i) {
+			csum = crc(img + 0x20 + i * 0x200, 0x1df);
+			if (csum != img[i * 0x200 + 0x1ff]) {
+				fprintf(stderr,
+					"Extension Header #%zu checksum mismatch: specified: 0x%02hhx, calculated: 0x%02hhx\n",
+					i, img[i * 0x200 + 0x1ff], csum);
+				return 1;
+			}
+		}
+	} else {
+		csum = crc(img, header_size);
+		csum -= img[0x1f];
+
+		if (csum != img[0x1f]) {
+			fprintf(stderr,
+				"Checksum mismatch: specified: 0x%02hhx, calculated: 0x%02hhx\n",
+				img[0x1f], csum);
+			return 1;
+		}
 
-	if (csum != img[0x1f]) {
-		fprintf(stderr,
-			"Checksum mismatch: specified: 0x%02hhx, calculated: 0x%02hhx\n",
-			img[0x1f], csum);
-		return 1;
 	}
 
 	return 0;
-- 
2.17.0


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Re: [PATCH 1/4] kwbimage_v0: add support to detect and boot a mvebu v0 image

[Sascha Hauer]

On Fri, Jun 01, 2018 at 08:07:47PM +0200, Uwe Kleine-König wrote:
> The differences between v0 and v1 of the mvebu kwbimage are small enough
> that the function to boot such an image can be shared between both
> variants.
> 
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
> ---
>  arch/arm/mach-mvebu/kwbootimage.c | 11 +++++++++--
>  common/filetype.c                 | 22 +++++++++++++++++-----
>  include/filetype.h                |  1 +
>  3 files changed, 27 insertions(+), 7 deletions(-)

Applied 2-4. This patch is the same as the first time you sent it,
right?

Sascha

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Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
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Re: [PATCH 1/4] kwbimage_v0: add support to detect and boot a mvebu v0 image

[Uwe Kleine-König]

Hello Sascha,

On Mon, Jun 04, 2018 at 09:01:37AM +0200, Sascha Hauer wrote:
> On Fri, Jun 01, 2018 at 08:07:47PM +0200, Uwe Kleine-König wrote:
> > The differences between v0 and v1 of the mvebu kwbimage are small enough
> > that the function to boot such an image can be shared between both
> > variants.
> > 
> > Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
> > ---
> >  arch/arm/mach-mvebu/kwbootimage.c | 11 +++++++++--
> >  common/filetype.c                 | 22 +++++++++++++++++-----
> >  include/filetype.h                |  1 +
> >  3 files changed, 27 insertions(+), 7 deletions(-)
> 
> Applied 2-4. This patch is the same as the first time you sent it,
> right?

ack, seems I forgot I already sent it separately.

Thanks
Uwe

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Re: [PATCH 2/4] libfile: implement new helper write_file_flash()

[Uwe Kleine-König]

Hello,

On Fri, Jun 01, 2018 at 08:07:48PM +0200, Uwe Kleine-König wrote:
> +	fd = open(filename, O_WRONLY | O_TRUNC | O_CREAT);

This doesn't work on the target machine (dove cubox) I intended to use
it on an m25p0 device. It returns -28. When dropping O_TRUNC | O_CREAT
it works though. So I suggest to either back out patches 3 and 4, or
change the line above to O_WRONLY (which also matches the function
removed in patch 4).

Best regards
Uwe

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Re: [PATCH 2/4] libfile: implement new helper write_file_flash()

[Sascha Hauer]

On Thu, Jun 07, 2018 at 10:53:01PM +0200, Uwe Kleine-König wrote:
> Hello,
> 
> On Fri, Jun 01, 2018 at 08:07:48PM +0200, Uwe Kleine-König wrote:
> > +	fd = open(filename, O_WRONLY | O_TRUNC | O_CREAT);
> 
> This doesn't work on the target machine (dove cubox) I intended to use
> it on an m25p0 device. It returns -28. When dropping O_TRUNC | O_CREAT
> it works though. So I suggest to either back out patches 3 and 4, or
> change the line above to O_WRONLY (which also matches the function
> removed in patch 4).

Ok, changed to O_WRONLY only.

Sascha

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Re: [PATCH 2/4] libfile: implement new helper write_file_flash()

[Uwe Kleine-König]

Hello Sascha,

On Fri, Jun 08, 2018 at 09:10:44AM +0200, Sascha Hauer wrote:
> On Thu, Jun 07, 2018 at 10:53:01PM +0200, Uwe Kleine-König wrote:
> > On Fri, Jun 01, 2018 at 08:07:48PM +0200, Uwe Kleine-König wrote:
> > > +	fd = open(filename, O_WRONLY | O_TRUNC | O_CREAT);
> > 
> > This doesn't work on the target machine (dove cubox) I intended to use
> > it on an m25p0 device. It returns -28. When dropping O_TRUNC | O_CREAT
> > it works though. So I suggest to either back out patches 3 and 4, or
> > change the line above to O_WRONLY (which also matches the function
> > removed in patch 4).
> 
> Ok, changed to O_WRONLY only.

Thanks
Uwe

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