Fix for the hardware reset hang problem - shut down the flash memory

device (ensure it is in read mode, not write) on halt/reboot.

5 files changed, 74 insertions, 3 deletions

diff --git a/packages/linux/nslu2-kernel.inc b/packages/linux/nslu2-kernel.inc
index 991805e1ab..44f466ef49 100644
--- a/packages/linux/nslu2-kernel.inc
+++ b/packages/linux/nslu2-kernel.inc
@@ -25,6 +25,7 @@
 #   file://ixp4xx_copy_from.patch;patch=1
 #   file://anonymiser.patch;patch=1
 #   file://xscale-reset.patch;patch=1
+#   file://mtd-shutdown.patch;patch=1
 #   ${N2K_EXTRA_PATCHES}
 #
 # N2K_SUFFIX - the suffix to add after 'zImage-' in the
@@ -194,6 +195,7 @@ N2K_PATCHES ?= "\
     file://ixp4xx_copy_from.patch;patch=1 \
     file://anonymiser.patch;patch=1 \
     file://xscale-reset.patch;patch=1 \
+    file://mtd-shutdown.patch;patch=1 \
     ${N2K_EXTRA_PATCHES}"
 
 N2K_SUFFIX ?= "openslug"
diff --git a/packages/linux/nslu2-kernel_2.6.12.2.bb b/packages/linux/nslu2-kernel_2.6.12.2.bb
index afd0ec8321..6fbb5d02ae 100644
--- a/packages/linux/nslu2-kernel_2.6.12.2.bb
+++ b/packages/linux/nslu2-kernel_2.6.12.2.bb
@@ -1,5 +1,5 @@
 # Kernel for NSLU2
-PR = "r2"
+PR = "r3"
 include nslu2-kernel.inc
 
 # N2K_EXTRA_PATCHES - list of patches to apply (can include
@@ -20,4 +20,5 @@ N2K_PATCHES = "\
 	file://anonymiser.patch;patch=1 \
 	file://xscale-reset.patch;patch=1 \
 	file://x1205-rtc.c-id.patch;patch=1 \
+	file://mtd-shutdown.patch;patch=1 \
 "
diff --git a/packages/linux/nslu2-kernel_2.6.12.bb b/packages/linux/nslu2-kernel_2.6.12.bb
index 8ab9379708..6cea8a4daa 100644
--- a/packages/linux/nslu2-kernel_2.6.12.bb
+++ b/packages/linux/nslu2-kernel_2.6.12.bb
@@ -1,5 +1,5 @@
 # Kernel for NSLU2
-PR = "r1"
+PR = "r2"
 include nslu2-kernel.inc
 
 # N2K_EXTRA_PATCHES - list of patches to apply (can include
@@ -20,4 +20,5 @@ N2K_PATCHES = "\
 	file://anonymiser.patch;patch=1 \
 	file://xscale-reset.patch;patch=1 \
 	file://x1205-rtc.c-id.patch;patch=1 \
+	file://mtd-shutdown.patch;patch=1 \
 "
diff --git a/packages/linux/openslug-kernel-2.6.11.2/mtd-shutdown.patch b/packages/linux/openslug-kernel-2.6.11.2/mtd-shutdown.patch
new file mode 100644
index 0000000000..e7cce4ebc0
--- /dev/null
+++ b/packages/linux/openslug-kernel-2.6.11.2/mtd-shutdown.patch
@@ -0,0 +1,66 @@
+# Ensure that the MTD is shut down on halt/reboot, otherwise the
+# hardware reset hangs
+
+--- linux-2.6.12.2/drivers/mtd/maps/ixp4xx.c.orig	2005-07-17 15:07:47.790388300 -0700
++++ linux-2.6.12.2/drivers/mtd/maps/ixp4xx.c	2005-07-17 17:00:08.082672710 -0700
+@@ -144,6 +144,52 @@
+ 	return 0;
+ }
+ 
++static void ixp4xx_flash_shutdown(struct device *_dev)
++{
++	struct platform_device *dev = to_platform_device(_dev);
++	struct flash_platform_data *plat = dev->dev.platform_data;
++	struct ixp4xx_flash_info *info = dev_get_drvdata(&dev->dev);
++	map_word d;
++
++	dev_set_drvdata(&dev->dev, NULL);
++
++	if(!info)
++		return;
++
++	/*
++	 * This is required for a soft reboot to work.
++	 */
++	d.x[0] = 0xff;
++	ixp4xx_write16(&info->map, d, 0x55 * 0x2);
++
++#if 0
++	/* This is commented out because it seems to cause a kernel
++	 * panic (at least if it isn't commented out the kernel fails
++	 * to shut down).  Should be investigated.
++	 */
++	if (info->mtd) {
++		del_mtd_partitions(info->mtd);
++		map_destroy(info->mtd);
++	}
++#endif
++	if (info->map.map_priv_1)
++		iounmap((void *) info->map.map_priv_1);
++
++	if (info->partitions)
++		kfree(info->partitions);
++
++	if (info->res) {
++		release_resource(info->res);
++		kfree(info->res);
++	}
++
++	if (plat->exit)
++		plat->exit();
++
++	/* Disable flash write */
++	*IXP4XX_EXP_CS0 &= ~IXP4XX_FLASH_WRITABLE;
++}
++
+ static int ixp4xx_flash_probe(struct device *_dev)
+ {
+ 	struct platform_device *dev = to_platform_device(_dev);
+@@ -243,6 +289,7 @@
+ 	.bus		= &platform_bus_type,
+ 	.probe		= ixp4xx_flash_probe,
+ 	.remove		= ixp4xx_flash_remove,
++	.shutdown	= ixp4xx_flash_shutdown,
+ };
+ 
+ static int __init ixp4xx_flash_init(void)
diff --git a/packages/linux/openslug-kernel_2.6.11.2.bb b/packages/linux/openslug-kernel_2.6.11.2.bb
index 1fe7da7344..8e2555d014 100644
--- a/packages/linux/openslug-kernel_2.6.11.2.bb
+++ b/packages/linux/openslug-kernel_2.6.11.2.bb
@@ -2,7 +2,7 @@ SECTION = "kernel"
 DESCRIPTION = "Linux kernel for the Linksys NSLU2 device"
 LICENSE = "GPL"
 MAINTAINER = "Chris Larson <kergoth@handhelds.org>"
-PR = "r14"
+PR = "r15"
 
 KERNEL_SUFFIX = "openslug"
 
@@ -12,6 +12,7 @@ SRC_URI = "ftp://ftp.kernel.org/pub/linux/kernel/v2.6/linux-2.6.11.2.tar.bz2 \
 	   file://ixp4xx_copy_from.patch;patch=1 \
 	   file://anonymiser.patch;patch=1 \
 	   file://xscale-reset.patch;patch=1 \
+	   file://mtd-shutdown.patch;patch=1 \
            file://defconfig \
            file://x1205-rtc.c \
            file://nslu2-io.c \