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authorBob Copeland <me@bobcopeland.com>2006-01-16 22:14:20 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-16 23:15:29 -0800
commit0e6e1db4ac7acfe3e38bbef9eba59233ba7f6b9a (patch)
treec65c54b53ccfc110dac42e29a4094304e0a575dd
parentcad8244840d1a148f638925758afd1cdf81fc839 (diff)
downloadlinux-linaro-0e6e1db4ac7acfe3e38bbef9eba59233ba7f6b9a.tar.gz
[PATCH] partitions: Read Rio Karma partition table
The Rio Karma portable MP3 player has its own proprietary partition table. The partition layout is similar to a DOS boot sector but it begins at a different offset and uses a different magic number (0xAB56 instead of 0xAA55). Add support for it to enable mounting the device. Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--fs/partitions/Kconfig7
-rw-r--r--fs/partitions/Makefile1
-rw-r--r--fs/partitions/check.c4
-rw-r--r--fs/partitions/karma.c57
-rw-r--r--fs/partitions/karma.h8
5 files changed, 77 insertions, 0 deletions
diff --git a/fs/partitions/Kconfig b/fs/partitions/Kconfig
index 7490cc9208b..c9a47809928 100644
--- a/fs/partitions/Kconfig
+++ b/fs/partitions/Kconfig
@@ -222,6 +222,13 @@ config SUN_PARTITION
given by the tar program ("man tar" or preferably "info tar"). If
you don't know what all this is about, say N.
+config KARMA_PARTITION
+ bool "Karma Partition support"
+ depends on PARTITION_ADVANCED
+ help
+ Say Y here if you would like to mount the Rio Karma MP3 player, as it
+ uses a proprietary partition table.
+
config EFI_PARTITION
bool "EFI GUID Partition support"
depends on PARTITION_ADVANCED
diff --git a/fs/partitions/Makefile b/fs/partitions/Makefile
index 66d5cc26faf..42c7d3878ed 100644
--- a/fs/partitions/Makefile
+++ b/fs/partitions/Makefile
@@ -17,3 +17,4 @@ obj-$(CONFIG_SUN_PARTITION) += sun.o
obj-$(CONFIG_ULTRIX_PARTITION) += ultrix.o
obj-$(CONFIG_IBM_PARTITION) += ibm.o
obj-$(CONFIG_EFI_PARTITION) += efi.o
+obj-$(CONFIG_KARMA_PARTITION) += karma.o
diff --git a/fs/partitions/check.c b/fs/partitions/check.c
index 7881ce05dae..f924f459bdb 100644
--- a/fs/partitions/check.c
+++ b/fs/partitions/check.c
@@ -35,6 +35,7 @@
#include "ibm.h"
#include "ultrix.h"
#include "efi.h"
+#include "karma.h"
#ifdef CONFIG_BLK_DEV_MD
extern void md_autodetect_dev(dev_t dev);
@@ -103,6 +104,9 @@ static int (*check_part[])(struct parsed_partitions *, struct block_device *) =
#ifdef CONFIG_IBM_PARTITION
ibm_partition,
#endif
+#ifdef CONFIG_KARMA_PARTITION
+ karma_partition,
+#endif
NULL
};
diff --git a/fs/partitions/karma.c b/fs/partitions/karma.c
new file mode 100644
index 00000000000..176d89bcf12
--- /dev/null
+++ b/fs/partitions/karma.c
@@ -0,0 +1,57 @@
+/*
+ * fs/partitions/karma.c
+ * Rio Karma partition info.
+ *
+ * Copyright (C) 2006 Bob Copeland (me@bobcopeland.com)
+ * based on osf.c
+ */
+
+#include "check.h"
+#include "karma.h"
+
+int karma_partition(struct parsed_partitions *state, struct block_device *bdev)
+{
+ int i;
+ int slot = 1;
+ Sector sect;
+ unsigned char *data;
+ struct disklabel {
+ u8 d_reserved[270];
+ struct d_partition {
+ __le32 p_res;
+ u8 p_fstype;
+ u8 p_res2[3];
+ __le32 p_offset;
+ __le32 p_size;
+ } d_partitions[2];
+ u8 d_blank[208];
+ __le16 d_magic;
+ } __attribute__((packed)) *label;
+ struct d_partition *p;
+
+ data = read_dev_sector(bdev, 0, &sect);
+ if (!data)
+ return -1;
+
+ label = (struct disklabel *)data;
+ if (le16_to_cpu(label->d_magic) != KARMA_LABEL_MAGIC) {
+ put_dev_sector(sect);
+ return 0;
+ }
+
+ p = label->d_partitions;
+ for (i = 0 ; i < 2; i++, p++) {
+ if (slot == state->limit)
+ break;
+
+ if (p->p_fstype == 0x4d && le32_to_cpu(p->p_size)) {
+ put_partition(state, slot, le32_to_cpu(p->p_offset),
+ le32_to_cpu(p->p_size));
+ }
+ slot++;
+ }
+ printk("\n");
+ put_dev_sector(sect);
+ return 1;
+}
+
diff --git a/fs/partitions/karma.h b/fs/partitions/karma.h
new file mode 100644
index 00000000000..ecf7d3f2a3d
--- /dev/null
+++ b/fs/partitions/karma.h
@@ -0,0 +1,8 @@
+/*
+ * fs/partitions/karma.h
+ */
+
+#define KARMA_LABEL_MAGIC 0xAB56
+
+int karma_partition(struct parsed_partitions *state, struct block_device *bdev);
+