[ARM] 4461/1: MXC platform and i.MX31ADS core support

This patch adds the foundation pieces for
the Freescale MXC platforms, including
i.MX2 and i.MX3 based systems.

The bare-bones MX31 support in this patch
boots to the rootdev panic with 8250 serial
console configured "console=ttyS0,115200".
It assumes that Redboot is the boot loader.

Signed-off-by: Quinn Jensen <quinn.jensen@freescale.com>
Acked-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 79 insertions, 0 deletions

diff --git a/include/asm-arm/arch-mxc/uncompress.h b/include/asm-arm/arch-mxc/uncompress.h
new file mode 100644
index 000000000000..ec5787d0e78c
--- /dev/null
+++ b/include/asm-arm/arch-mxc/uncompress.h
@@ -0,0 +1,79 @@
+/*
+ *  include/asm-arm/arch-mxc/uncompress.h
+ *
+ *
+ *
+ *  Copyright (C) 1999 ARM Limited
+ *  Copyright (C) Shane Nay (shane@minirl.com)
+ *
+ * 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
+ */
+#ifndef __ASM_ARCH_MXC_UNCOMPRESS_H__
+#define __ASM_ARCH_MXC_UNCOMPRESS_H__
+
+#define __MXC_BOOT_UNCOMPRESS
+
+#include <asm/hardware.h>
+#include <asm/processor.h>
+
+#define UART(x) (*(volatile unsigned long *)(serial_port + (x)))
+
+#define USR2 0x98
+#define USR2_TXFE (1<<14)
+#define TXR  0x40
+#define UCR1 0x80
+#define UCR1_UARTEN 1
+
+/*
+ * The following code assumes the serial port has already been
+ * initialized by the bootloader.  We search for the first enabled
+ * port in the most probable order.  If you didn't setup a port in
+ * your bootloader then nothing will appear (which might be desired).
+ *
+ * This does not append a newline
+ */
+
+static void putc(int ch)
+{
+        static unsigned long serial_port = 0;
+
+        if (unlikely(serial_port == 0)) {
+                do {
+                        serial_port = UART1_BASE_ADDR;
+                        if (UART(UCR1) & UCR1_UARTEN)
+                                break;
+                        serial_port = UART2_BASE_ADDR;
+                        if (UART(UCR1) & UCR1_UARTEN)
+                                break;
+                        return;
+                } while (0);
+        }
+
+        while (!(UART(USR2) & USR2_TXFE))
+                cpu_relax();
+
+        UART(TXR) = ch;
+}
+
+#define flush() do { } while (0)
+
+/*
+ * nothing to do
+ */
+#define arch_decomp_setup()
+
+#define arch_decomp_wdog()
+
+#endif                          /* __ASM_ARCH_MXC_UNCOMPRESS_H__ */