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authorJuergen Beisert <j.beisert@pengutronix.de>2008-07-05 10:02:56 +0200
committerRobert Schwebel <r.schwebel@pengutronix.de>2008-07-05 10:02:56 +0200
commiteea643f7ff04fe17c3ff71d41a9487c0753bd821 (patch)
treec9c097f8c99c155064c37e619527687ba4286873 /arch
parentaa10abd381b9493a88f6b9e111adc79e33d548fa (diff)
i.MX2 family: Add basic mach support (sources)
This patch adds basic mach support for the mx2 processor family, based on the original freescale code and adapted to mainline kernel coding style. Signed-off-by: Juergen Beisert <j.beisert@pengutronix.de>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-mx2/Kconfig5
-rw-r--r--arch/arm/mach-mx2/Makefile7
-rw-r--r--arch/arm/mach-mx2/Makefile.boot3
-rw-r--r--arch/arm/mach-mx2/generic.c74
-rw-r--r--arch/arm/mach-mx2/system.c63
5 files changed, 152 insertions, 0 deletions
diff --git a/arch/arm/mach-mx2/Kconfig b/arch/arm/mach-mx2/Kconfig
new file mode 100644
index 00000000000..23def05fea0
--- /dev/null
+++ b/arch/arm/mach-mx2/Kconfig
@@ -0,0 +1,5 @@
+comment "MX2 family CPU support"
+ depends on ARCH_MX2
+
+comment "MX2 Platforms"
+ depends on ARCH_MX2
diff --git a/arch/arm/mach-mx2/Makefile b/arch/arm/mach-mx2/Makefile
new file mode 100644
index 00000000000..937192dc57a
--- /dev/null
+++ b/arch/arm/mach-mx2/Makefile
@@ -0,0 +1,7 @@
+#
+# Makefile for the linux kernel.
+#
+
+# Object file lists.
+
+obj-y := system.o generic.o
diff --git a/arch/arm/mach-mx2/Makefile.boot b/arch/arm/mach-mx2/Makefile.boot
new file mode 100644
index 00000000000..696831dcd48
--- /dev/null
+++ b/arch/arm/mach-mx2/Makefile.boot
@@ -0,0 +1,3 @@
+ zreladdr-y := 0xA0008000
+params_phys-y := 0xA0000100
+initrd_phys-y := 0xA0800000
diff --git a/arch/arm/mach-mx2/generic.c b/arch/arm/mach-mx2/generic.c
new file mode 100644
index 00000000000..07875cf00de
--- /dev/null
+++ b/arch/arm/mach-mx2/generic.c
@@ -0,0 +1,74 @@
+/*
+ * generic.c
+ *
+ * Copyright (C) 2008 Juergen Beisert (kernel@pengutronix.de)
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+
+#include <linux/mm.h>
+#include <linux/init.h>
+#include <asm/hardware.h>
+#include <asm/pgtable.h>
+#include <asm/mach/map.h>
+
+/* MX27 memory map definition */
+static struct map_desc mxc_io_desc[] __initdata = {
+ /*
+ * this fixed mapping covers:
+ * - AIPI1
+ * - AIPI2
+ * - AITC
+ * - ROM Patch
+ * - and some reserved space
+ */
+ {
+ .virtual = AIPI_BASE_ADDR_VIRT,
+ .pfn = __phys_to_pfn(AIPI_BASE_ADDR),
+ .length = AIPI_SIZE,
+ .type = MT_DEVICE
+ },
+ /*
+ * this fixed mapping covers:
+ * - CSI
+ * - ATA
+ */
+ {
+ .virtual = SAHB1_BASE_ADDR_VIRT,
+ .pfn = __phys_to_pfn(SAHB1_BASE_ADDR),
+ .length = SAHB1_SIZE,
+ .type = MT_DEVICE
+ },
+ /*
+ * this fixed mapping covers:
+ * - EMI
+ */
+ {
+ .virtual = X_MEMC_BASE_ADDR_VIRT,
+ .pfn = __phys_to_pfn(X_MEMC_BASE_ADDR),
+ .length = X_MEMC_SIZE,
+ .type = MT_DEVICE
+ }
+};
+
+/*
+ * Initialize the memory map. It is called during the
+ * system startup to create static physical to virtual
+ * memory map for the IO modules.
+ */
+void __init mxc_map_io(void)
+{
+ iotable_init(mxc_io_desc, ARRAY_SIZE(mxc_io_desc));
+}
diff --git a/arch/arm/mach-mx2/system.c b/arch/arm/mach-mx2/system.c
new file mode 100644
index 00000000000..99304645299
--- /dev/null
+++ b/arch/arm/mach-mx2/system.c
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 1999 ARM Limited
+ * Copyright (C) 2000 Deep Blue Solutions Ltd
+ * Copyright 2006-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright 2008 Juergen Beisert, kernel@pengutronix.de
+ *
+ * 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 <linux/kernel.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+
+#include <asm/arch/hardware.h>
+#include <asm/proc-fns.h>
+#include <asm/system.h>
+
+/*
+ * Put the CPU into idle mode. It is called by default_idle()
+ * in process.c file.
+ */
+void arch_idle(void)
+{
+ /*
+ * This should do all the clock switching
+ * and wait for interrupt tricks.
+ */
+ cpu_do_idle();
+}
+
+#define WDOG_WCR_REG IO_ADDRESS(WDOG_BASE_ADDR)
+#define WDOG_WCR_SRS (1 << 4)
+
+/*
+ * Reset the system. It is called by machine_restart().
+ */
+void arch_reset(char mode)
+{
+ struct clk *clk;
+
+ clk = clk_get(NULL, "wdog_clk");
+ if (!clk) {
+ printk(KERN_ERR"Cannot activate the watchdog. Giving up\n");
+ return;
+ }
+
+ clk_enable(clk);
+
+ /* Assert SRS signal */
+ __raw_writew(__raw_readw(WDOG_WCR_REG) & ~WDOG_WCR_SRS, WDOG_WCR_REG);
+}