Add i.MX21ads support

Signed-off-by: Ivo Clarysse <ivo.clarysse@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

6 files changed, 248 insertions, 0 deletions

diff --git a/board/imx21ads/Makefile b/board/imx21ads/Makefile
new file mode 100644
index 0000000000..7993fdef8a
--- /dev/null
+++ b/board/imx21ads/Makefile
@@ -0,0 +1,2 @@
+obj-y += lowlevel_init.o
+obj-y += imx21ads.o
diff --git a/board/imx21ads/config.h b/board/imx21ads/config.h
new file mode 100644
index 0000000000..6ec1996a8b
--- /dev/null
+++ b/board/imx21ads/config.h
@@ -0,0 +1,24 @@
+/**
+ * @file
+ * @brief Global defintions for the ARM i.MX21 based imx21ads
+ *
+ * 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 __CONFIG_H
+#define __CONFIG_H
+
+#endif	/* __CONFIG_H */
diff --git a/board/imx21ads/env/bin/init b/board/imx21ads/env/bin/init
new file mode 100644
index 0000000000..224a6b40be
--- /dev/null
+++ b/board/imx21ads/env/bin/init
@@ -0,0 +1 @@
+# Dummy Init environment script
diff --git a/board/imx21ads/imx21ads.c b/board/imx21ads/imx21ads.c
new file mode 100644
index 0000000000..be9b487cf8
--- /dev/null
+++ b/board/imx21ads/imx21ads.c
@@ -0,0 +1,146 @@
+/*
+ * Copyright (C) 2009 Ivo Clarysse
+ * 
+ * Based on imx27ads.c,
+ *   Copyright (C) 2007 Sascha Hauer, Pengutronix 
+ *
+ * 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 <net.h>
+#include <cfi_flash.h>
+#include <init.h>
+#include <environment.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/armlinux.h>
+#include <asm/io.h>
+#include <asm/arch/gpio.h>
+#include <partition.h>
+#include <fs.h>
+#include <fcntl.h>
+#include <asm/mach-types.h>
+#include <asm/arch/imx-nand.h>
+
+static struct device_d cfi_dev = {
+	.name     = "cfi_flash",
+	.id       = "nor0",
+
+	.map_base = 0xC8000000,
+	.size     = 32 * 1024 * 1024,
+};
+
+static struct device_d sdram_dev = {
+	.name     = "ram",
+	.id       = "ram0",
+
+	.map_base = 0xc0000000,
+	.size     = 64 * 1024 * 1024,
+
+	.type     = DEVICE_TYPE_DRAM,
+};
+
+struct imx_nand_platform_data nand_info = {
+	.width = 1,
+	.hw_ecc = 1,
+};
+
+static struct device_d nand_dev = {
+	.name     = "imx_nand",
+	.map_base = 0xDF003000,
+	.platform_data  = &nand_info,
+};
+
+
+static int imx21ads_timing_init(void)
+{
+	u32 temp;
+
+	/* Configure External Interface Module */
+	/* CS0: burst flash */
+	CS0U = 0x00003E00;
+	CS0L = 0x00000E01;
+
+	/* CS1: Ethernet controller, external UART, memory-mapped I/O (16-bit) */
+	CS1U = 0x00002000;
+	CS1L = 0x11118501;
+
+	/* CS2: disable (not available, since CSD0 in use) */
+	CS2U = 0x0;
+	CS2L = 0x0;
+
+	/* CS3: disable */
+	CS3U = 0x0;
+	CS3L = 0x0;
+	/* CS4: disable */
+	CS4U = 0x0;
+	CS4L = 0x0;
+	/* CS5: disable */
+	CS5U = 0x0;
+	CS5L = 0x0;
+
+	temp = PCDR0;
+	temp &= ~0xF000;
+	temp |= 0xA000;  /* Set NFC divider; 0xA yields 24.18MHz */
+	PCDR0 = temp;
+
+	return 0;
+}
+
+core_initcall(imx21ads_timing_init);
+
+static int mx21ads_devices_init(void)
+{
+	int i;
+	unsigned int mode[] = {
+		PE12_PF_UART1_TXD,
+		PE13_PF_UART1_RXD,
+		PE14_PF_UART1_CTS,
+		PE15_PF_UART1_RTS,
+	};
+
+	/* initizalize gpios */
+	for (i = 0; i < ARRAY_SIZE(mode); i++)
+		imx_gpio_mode(mode[i]);
+
+	register_device(&cfi_dev);
+	register_device(&sdram_dev);
+	register_device(&nand_dev);
+
+	armlinux_set_bootparams((void *)0xc0000100);
+	armlinux_set_architecture(MACH_TYPE_MX21ADS);
+
+	return 0;
+}
+
+device_initcall(mx21ads_devices_init);
+
+static struct device_d mx21ads_serial_device = {
+	.name     = "imx_serial",
+	.id       = "cs0",
+	.map_base = IMX_UART1_BASE,
+	.size     = 4096,
+	.type     = DEVICE_TYPE_CONSOLE,
+};
+
+static int mx21ads_console_init(void)
+{
+	register_device(&mx21ads_serial_device);
+	return 0;
+}
+
+console_initcall(mx21ads_console_init);
diff --git a/board/imx21ads/imx21ads.dox b/board/imx21ads/imx21ads.dox
new file mode 100644
index 0000000000..9f11ffaa6e
--- /dev/null
+++ b/board/imx21ads/imx21ads.dox
@@ -0,0 +1,5 @@
+/** @page imx21ads Freescale i.MX21ads
+
+This is the Freescale evaluation board for the i.MX21 Processor
+
+*/
diff --git a/board/imx21ads/lowlevel_init.S b/board/imx21ads/lowlevel_init.S
new file mode 100644
index 0000000000..ee3b0853ce
--- /dev/null
+++ b/board/imx21ads/lowlevel_init.S
@@ -0,0 +1,70 @@
+/*
+ * For clock initialization, see chapter 6 of the 
+ * "i.MX21 Applications Processor Reference Manual, Rev. 3".
+ */
+
+#include <config.h>
+#include <asm/arch/imx-regs.h>
+
+#define writel(val, reg) \
+	ldr		r0,	=reg;	\
+	ldr		r1,	=val;	\
+	str		r1,   [r0];
+
+.macro sdram_init_mx21ads
+#if 0
+	/* Set precharge command */
+	writel(0x92120300, SDCTL0);
+
+	/* Issue Precharge all Command */
+	ldr  r3, =0xC0200000;
+	ldr  r2, [r3];
+
+	/* Set AutoRefresh command */
+	writel(0x92120300, SDCTL0);
+
+	/* Issue AutoRefresh command */
+	ldr  r3, =0xC0000000;
+	ldr  r2, [r3];
+	ldr  r2, [r3];
+	ldr  r2, [r3];
+	ldr  r2, [r3];
+	ldr  r2, [r3];
+	ldr  r2, [r3];
+	ldr  r2, [r3];
+	ldr  r2, [r3];
+
+	
+	/* Set Mode Register */
+	writel(0xB2120300, SDCTL0);
+#endif
+.endm
+
+.globl board_init_lowlevel
+board_init_lowlevel:
+
+	mov	r10, lr
+
+	/* ahb lite ip interface */
+	writel(0x00040304, AIPI1_PSR0)
+	writel(0xFFFBFCFB, AIPI1_PSR1)
+	writel(0x00000000, AIPI2_PSR0)
+	writel(0xFFFFFFFF, AIPI2_PSR1)
+
+	/* Set MPLL to 266MHz */
+	writel(0x007B1C73, MPCTL0);
+	/* PLL 133MHz */
+	writel(0x17000607, CSCR);
+
+	/* skip sdram initialization if we run from ram */
+	/* (SDRAM is mapped from C0000000 to C3FFFFFF)  */
+	cmp	pc, #0xc0000000
+	bls	1f
+	cmp	pc, #0xc8000000
+	bhi	1f
+
+	mov	pc,r10
+1:
+	sdram_init_mx21ads
+
+	mov	pc,r10