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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 /fs/partitions/karma.c
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>
Diffstat (limited to 'fs/partitions/karma.c')
-rw-r--r--fs/partitions/karma.c57
1 files changed, 57 insertions, 0 deletions
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;
+}
+