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authorJohn Tobias <john.tobias.ph@gmail.com>2016-04-13 12:06:51 -0700
committerMarek Vasut <marex@denx.de>2016-04-20 11:43:27 +0200
commita2e3a1d86c17b457056a4b65d8c045d98a75ba0f (patch)
tree7c0d49b9727f1346c611bda0a0e23de95f9777b8 /cmd/usb_mass_storage.c
parent5b718407ed937fdcd1beeab9f62e42158dee9fa6 (diff)
usb: ums - expose selected partition/s
By applying this patch, it will give us some flexibility to expose a selected partition/s. e.g: 1. To expose several partitions ums 0 mmc 0:1,0:6 2. To expose the all partitions ums 0 mmc 0:0 3. To expose multiple partititions on several devices ums 0 mmc 0:1,1:6 4. It support legacy format ums 0 mmc 0 Signed-off-by: John Tobias <john.tobias.ph@gmail.com>
Diffstat (limited to 'cmd/usb_mass_storage.c')
-rw-r--r--cmd/usb_mass_storage.c39
1 files changed, 29 insertions, 10 deletions
diff --git a/cmd/usb_mass_storage.c b/cmd/usb_mass_storage.c
index 14eed980df..ac53a73310 100644
--- a/cmd/usb_mass_storage.c
+++ b/cmd/usb_mass_storage.c
@@ -50,14 +50,16 @@ static void ums_fini(void)
#define UMS_NAME_LEN 16
-static int ums_init(const char *devtype, const char *devnums)
+static int ums_init(const char *devtype, const char *devnums_part_str)
{
- char *s, *t, *devnum, *name;
+ char *s, *t, *devnum_part_str, *name;
struct blk_desc *block_dev;
+ disk_partition_t info;
+ int partnum;
int ret;
struct ums *ums_new;
- s = strdup(devnums);
+ s = strdup(devnums_part_str);
if (!s)
return -1;
@@ -65,14 +67,23 @@ static int ums_init(const char *devtype, const char *devnums)
ums_count = 0;
for (;;) {
- devnum = strsep(&t, ",");
- if (!devnum)
+ devnum_part_str = strsep(&t, ",");
+ if (!devnum_part_str)
break;
- ret = blk_get_device_by_str(devtype, devnum, &block_dev);
- if (ret < 0)
+ partnum = blk_get_device_part_str(devtype, devnum_part_str,
+ &block_dev, &info, 1);
+
+ if (partnum < 0)
goto cleanup;
+ /* Check if the argument is in legacy format. If yes,
+ * expose all partitions by setting the partnum = 0
+ * e.g. ums 0 mmc 0
+ */
+ if (!strchr(devnum_part_str, ':'))
+ partnum = 0;
+
/* f_mass_storage.c assumes SECTOR_SIZE sectors */
if (block_dev->blksz != SECTOR_SIZE) {
ret = -1;
@@ -86,10 +97,18 @@ static int ums_init(const char *devtype, const char *devnums)
}
ums = ums_new;
+ /* if partnum = 0, expose all partitions */
+ if (partnum == 0) {
+ ums[ums_count].start_sector = 0;
+ ums[ums_count].num_sectors = block_dev->lba;
+ } else {
+ ums[ums_count].start_sector = info.start;
+ ums[ums_count].num_sectors = info.size;
+ }
+
ums[ums_count].read_sector = ums_read_sector;
ums[ums_count].write_sector = ums_write_sector;
- ums[ums_count].start_sector = 0;
- ums[ums_count].num_sectors = block_dev->lba;
+
name = malloc(UMS_NAME_LEN);
if (!name) {
ret = -1;
@@ -230,6 +249,6 @@ cleanup_ums_init:
U_BOOT_CMD(ums, 4, 1, do_usb_mass_storage,
"Use the UMS [USB Mass Storage]",
- "<USB_controller> [<devtype>] <devnum> e.g. ums 0 mmc 0\n"
+ "<USB_controller> [<devtype>] <dev[:part]> e.g. ums 0 mmc 0\n"
" devtype defaults to mmc"
);