85xx: Move LAW init code into C

Move the initialization of the LAWs into C code and provide an API
to allow modification of LAWs after init.

Board code is responsible to provide a law_table and num_law_entries.

We should be able to use the same code on 86xx as well.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

2 files changed, 71 insertions, 0 deletions

diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 78cec21..67521720 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -28,6 +28,7 @@ LIB 	:= $(obj)libmisc.a
 COBJS-y += ali512x.o
 COBJS-y += ns87308.o
 COBJS-y += status_led.o
+COBJS-$(CONFIG_FSL_LAW) += fsl_law.o
 
 COBJS	:= $(COBJS-y)
 SRCS 	:= $(COBJS:.o=.c)
diff --git a/drivers/misc/fsl_law.c b/drivers/misc/fsl_law.c
new file mode 100644
index 0000000..8bdf5a7
--- /dev/null
+++ b/drivers/misc/fsl_law.c
@@ -0,0 +1,70 @@
+/*
+ * Copyright 2008 Freescale Semiconductor, Inc.
+ *
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/fsl_law.h>
+#include <asm/io.h>
+
+#define LAWAR_EN	0x80000000
+
+void set_law(u8 idx, phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
+{
+	volatile u32 *base = (volatile u32 *)(CFG_IMMR + 0xc08);
+	volatile u32 *lawbar = base + 8 * idx;
+	volatile u32 *lawar = base + 8 * idx + 2;
+
+	out_be32(lawbar, addr >> 12);
+	out_be32(lawar, LAWAR_EN | ((u32)id << 20) | (u32)sz);
+
+	return ;
+}
+
+void disable_law(u8 idx)
+{
+	volatile u32 *base = (volatile u32 *)(CFG_IMMR + 0xc08);
+	volatile u32 *lawbar = base + 8 * idx;
+	volatile u32 *lawar = base + 8 * idx + 2;
+
+	out_be32(lawar, 0);
+	out_be32(lawbar, 0);
+
+	return;
+}
+
+void init_laws(void)
+{
+	int i;
+	u8 law_idx = 0;
+
+	for (i = 0; i < num_law_entries; i++) {
+		if (law_table[i].index != -1)
+			law_idx = law_table[i].index;
+
+		set_law(law_idx++, law_table[i].addr,
+			law_table[i].size, law_table[i].trgt_id);
+	}
+
+	return ;
+}