b361a9d59a
Some devices out there only have a NOR flash to store the rootfs on. While using UBI is arguable on this kind of flash, this is something that should be supported. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Imre Kaloz <kaloz@openwrt.org> SVN-Revision: 44260
77 lines
2.1 KiB
Diff
77 lines
2.1 KiB
Diff
From 8a52e4100d7c3a4a1dfddfa02b8864a9b0068c13 Mon Sep 17 00:00:00 2001
|
|
From: Daniel Golle <daniel@makrotopia.org>
|
|
Date: Sat, 17 May 2014 03:36:18 +0200
|
|
Subject: [PATCH 1/5] ubi: auto-attach mtd device named "ubi" or "data" on boot
|
|
To: openwrt-devel@lists.openwrt.org
|
|
|
|
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
|
|
---
|
|
drivers/mtd/ubi/build.c | 36 ++++++++++++++++++++++++++++++++++++
|
|
1 file changed, 36 insertions(+)
|
|
|
|
--- a/drivers/mtd/ubi/build.c
|
|
+++ b/drivers/mtd/ubi/build.c
|
|
@@ -1209,6 +1209,49 @@ static struct mtd_info * __init open_mtd
|
|
return mtd;
|
|
}
|
|
|
|
+/*
|
|
+ * This function tries attaching mtd partitions named either "ubi" or "data"
|
|
+ * during boot.
|
|
+ */
|
|
+static void __init ubi_auto_attach(void)
|
|
+{
|
|
+ int err;
|
|
+ struct mtd_info *mtd;
|
|
+
|
|
+ /* try attaching mtd device named "ubi" or "data" */
|
|
+ mtd = open_mtd_device("ubi");
|
|
+ if (IS_ERR(mtd))
|
|
+ mtd = open_mtd_device("data");
|
|
+
|
|
+ if (!IS_ERR(mtd)) {
|
|
+ size_t len;
|
|
+ char magic[4];
|
|
+
|
|
+ /* check for a valid ubi magic */
|
|
+ err = mtd_read(mtd, 0, 4, &len, (void *) magic);
|
|
+ if (!err && len == 4 && strncmp(magic, "UBI#", 4)) {
|
|
+ ubi_err("no valid UBI magic found inside mtd%d", mtd->index);
|
|
+ put_mtd_device(mtd);
|
|
+ return;
|
|
+ }
|
|
+
|
|
+ /* auto-add only media types where UBI makes sense */
|
|
+ if (mtd->type == MTD_NANDFLASH ||
|
|
+ mtd->type == MTD_NORFLASH ||
|
|
+ mtd->type == MTD_DATAFLASH ||
|
|
+ mtd->type == MTD_MLCNANDFLASH) {
|
|
+ mutex_lock(&ubi_devices_mutex);
|
|
+ ubi_msg("auto-attach mtd%d", mtd->index);
|
|
+ err = ubi_attach_mtd_dev(mtd, UBI_DEV_NUM_AUTO, 0, 0);
|
|
+ mutex_unlock(&ubi_devices_mutex);
|
|
+ if (err < 0) {
|
|
+ ubi_err("cannot attach mtd%d", mtd->index);
|
|
+ put_mtd_device(mtd);
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+}
|
|
+
|
|
static int __init ubi_init(void)
|
|
{
|
|
int err, i, k;
|
|
@@ -1298,6 +1341,12 @@ static int __init ubi_init(void)
|
|
}
|
|
}
|
|
|
|
+ /* auto-attach mtd devices only if built-in to the kernel and no ubi.mtd
|
|
+ * parameter was given */
|
|
+ if (config_enabled(CONFIG_MTD_ROOTFS_ROOT_DEV) &&
|
|
+ !ubi_is_module() && !mtd_devs)
|
|
+ ubi_auto_attach();
|
|
+
|
|
err = ubiblock_init();
|
|
if (err) {
|
|
ubi_err("block: cannot initialize, error %d", err);
|