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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/sh/boot/romimage/mmcif-sh7724.c
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/sh/boot/romimage/mmcif-sh7724.c')
-rw-r--r--kernel/arch/sh/boot/romimage/mmcif-sh7724.c72
1 files changed, 72 insertions, 0 deletions
diff --git a/kernel/arch/sh/boot/romimage/mmcif-sh7724.c b/kernel/arch/sh/boot/romimage/mmcif-sh7724.c
new file mode 100644
index 000000000..16b122510
--- /dev/null
+++ b/kernel/arch/sh/boot/romimage/mmcif-sh7724.c
@@ -0,0 +1,72 @@
+/*
+ * sh7724 MMCIF loader
+ *
+ * Copyright (C) 2010 Magnus Damm
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/mmc/sh_mmcif.h>
+#include <linux/mmc/boot.h>
+#include <mach/romimage.h>
+
+#define MMCIF_BASE (void __iomem *)0xa4ca0000
+
+#define MSTPCR2 0xa4150038
+#define PTWCR 0xa4050146
+#define PTXCR 0xa4050148
+#define PSELA 0xa405014e
+#define PSELE 0xa4050156
+#define HIZCRC 0xa405015c
+#define DRVCRA 0xa405018a
+
+/* SH7724 specific MMCIF loader
+ *
+ * loads the romImage from an MMC card starting from block 512
+ * use the following line to write the romImage to an MMC card
+ * # dd if=arch/sh/boot/romImage of=/dev/sdx bs=512 seek=512
+ */
+asmlinkage void mmcif_loader(unsigned char *buf, unsigned long no_bytes)
+{
+ mmcif_update_progress(MMC_PROGRESS_ENTER);
+
+ /* enable clock to the MMCIF hardware block */
+ __raw_writel(__raw_readl(MSTPCR2) & ~0x20000000, MSTPCR2);
+
+ /* setup pins D7-D0 */
+ __raw_writew(0x0000, PTWCR);
+
+ /* setup pins MMC_CLK, MMC_CMD */
+ __raw_writew(__raw_readw(PTXCR) & ~0x000f, PTXCR);
+
+ /* select D3-D0 pin function */
+ __raw_writew(__raw_readw(PSELA) & ~0x2000, PSELA);
+
+ /* select D7-D4 pin function */
+ __raw_writew(__raw_readw(PSELE) & ~0x3000, PSELE);
+
+ /* disable Hi-Z for the MMC pins */
+ __raw_writew(__raw_readw(HIZCRC) & ~0x0620, HIZCRC);
+
+ /* high drive capability for MMC pins */
+ __raw_writew(__raw_readw(DRVCRA) | 0x3000, DRVCRA);
+
+ mmcif_update_progress(MMC_PROGRESS_INIT);
+
+ /* setup MMCIF hardware */
+ sh_mmcif_boot_init(MMCIF_BASE);
+
+ mmcif_update_progress(MMC_PROGRESS_LOAD);
+
+ /* load kernel via MMCIF interface */
+ sh_mmcif_boot_do_read(MMCIF_BASE, 512,
+ (no_bytes + SH_MMCIF_BBS - 1) / SH_MMCIF_BBS,
+ buf);
+
+ /* disable clock to the MMCIF hardware block */
+ __raw_writel(__raw_readl(MSTPCR2) | 0x20000000, MSTPCR2);
+
+ mmcif_update_progress(MMC_PROGRESS_DONE);
+}