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authorStephen Warren <swarren@nvidia.com>2012-09-21 09:50:57 +0000
committerTom Rini <trini@ti.com>2012-09-25 14:58:48 -0700
commit10a37fd7a40826c43a63591855346adf1a1ac02d (patch)
treebfe36ab5ea3f539433740e271ba6e5215b5a43a1 /common/cmd_fat.c
parent2023e60861283ee808950a558e14b45be8776bf4 (diff)
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disk: get_device_and_partition() "auto" partition and cleanup
Rework get_device_and_partition() to: a) Implement a new partition ID of "auto", which requests that U-Boot search for the first "bootable" partition, and fall back to the first valid partition if none is found. This way, users don't need to specify an explicit partition in their commands. b) Make use of get_device(). c) Add parameter to indicate whether returning a whole device is acceptable, or whether a partition is mandatory. d) Make error-checking of the user's device-/partition-specification more complete. In particular, if strtoul() doesn't convert all characters, it's an error rather than just ignored. The resultant device/partition returned by the function will be as follows, based on whether the disk has a partition table (ptable) or not, and whether the calling command allows the whole device to be returned or not. (D and P are integers, P >= 1) D D: No ptable: !allow_whole_dev: error allow_whole_dev: device D ptable: device D partition 1 D:0 !allow_whole_dev: error allow_whole_dev: device D D:P No ptable: error ptable: device D partition P D:auto No ptable: !allow_whole_dev: error allow_whole_dev: device D ptable: first partition in device D with bootable flag set. If none, first valid paratition in device D. Note: In order to review this patch, it's probably easiest to simply look at the file contents post-application, rather than reading the patch itself. Signed-off-by: Rob Herring <rob.herring@calxeda.com> [swarren: Rob implemented scanning for bootable partitions. I fixed a couple of issues there, switched the syntax to ":auto", added the error-checking rework, and ":0" syntax for the whole device] Signed-off-by: Stephen Warren <swarren@nvidia.com>
Diffstat (limited to 'common/cmd_fat.c')
-rw-r--r--common/cmd_fat.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/common/cmd_fat.c b/common/cmd_fat.c
index 90412d6..01e02f5 100644
--- a/common/cmd_fat.c
+++ b/common/cmd_fat.c
@@ -49,7 +49,7 @@ int do_fat_fsload (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
return 1;
}
- part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info);
+ part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info, 1);
if (part < 0)
return 1;
@@ -101,7 +101,7 @@ int do_fat_ls (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
return 0;
}
- part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info);
+ part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info, 1);
if (part < 0)
return 1;
@@ -139,7 +139,7 @@ int do_fat_fsinfo (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
return 0;
}
- part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info);
+ part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info, 1);
if (part < 0)
return 1;
@@ -175,7 +175,7 @@ static int do_fat_fswrite(cmd_tbl_t *cmdtp, int flag,
if (argc < 5)
return cmd_usage(cmdtp);
- part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info);
+ part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info, 1);
if (part < 0)
return 1;