From 93ba78ece1eb153be1519b254b7ae4e1f8289b70 Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Tue, 20 Jan 2015 14:52:39 +0100
Subject: ARM: MXS: imx28evk: Add lowlevel support

This switches the imx28evk to multiimage support and adds the
lowlevel initialization to make the bootlets unnecessary.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 arch/arm/boards/freescale-mx28-evk/lowlevel.c | 58 ++++++++++++++++++++++++++-
 1 file changed, 56 insertions(+), 2 deletions(-)

(limited to 'arch/arm/boards/freescale-mx28-evk/lowlevel.c')

diff --git a/arch/arm/boards/freescale-mx28-evk/lowlevel.c b/arch/arm/boards/freescale-mx28-evk/lowlevel.c
index 3c7248ef65..a46a080518 100644
--- a/arch/arm/boards/freescale-mx28-evk/lowlevel.c
+++ b/arch/arm/boards/freescale-mx28-evk/lowlevel.c
@@ -1,11 +1,65 @@
+#define pr_fmt(fmt) "Freescale MX28evk: " fmt
+#define DEBUG
+
 #include <common.h>
 #include <linux/sizes.h>
 #include <asm/barebox-arm-head.h>
 #include <asm/barebox-arm.h>
 #include <mach/imx28-regs.h>
+#include <mach/init.h>
+#include <io.h>
+#include <debug_ll.h>
+#include <mach/iomux.h>
+#include <stmp-device.h>
 
-void __naked barebox_arm_reset_vector(void)
+ENTRY_FUNCTION(start_barebox_freescale_mx28evk, r0, r1, r2)
 {
-	arm_cpu_lowlevel_init();
 	barebox_arm_entry(IMX_MEMORY_BASE, SZ_128M, NULL);
 }
+
+static const uint32_t iomux_pads[] = {
+	/* EMI */
+	EMI_DATA0, EMI_DATA1, EMI_DATA2, EMI_DATA3, EMI_DATA4, EMI_DATA5,
+	EMI_DATA6, EMI_DATA7, EMI_DATA8, EMI_DATA9, EMI_DATA10, EMI_DATA11,
+	EMI_DATA12, EMI_DATA13, EMI_DATA14, EMI_DATA15, EMI_ODT0, EMI_DQM0,
+	EMI_ODT1, EMI_DQM1, EMI_DDR_OPEN_FB, EMI_CLK, EMI_DSQ0, EMI_DSQ1,
+	EMI_DDR_OPEN, EMI_A0, EMI_A1, EMI_A2, EMI_A3, EMI_A4, EMI_A5,
+	EMI_A6, EMI_A7, EMI_A8, EMI_A9, EMI_A10, EMI_A11, EMI_A12, EMI_A13,
+	EMI_A14, EMI_BA0, EMI_BA1, EMI_BA2, EMI_CASN, EMI_RASN, EMI_WEN,
+	EMI_CE0N, EMI_CE1N, EMI_CKE,
+
+	/* Debug UART */
+	PWM0_DUART_RX | VE_3_3V,
+	PWM1_DUART_TX | VE_3_3V,
+};
+
+static noinline void freescale_mx28evk_init(void)
+{
+	int i;
+
+	/* initialize muxing */
+	for (i = 0; i < ARRAY_SIZE(iomux_pads); i++)
+		imx_gpio_mode(iomux_pads[i]);
+
+	pr_debug("initializing power...\n");
+
+	mx28_power_init_battery_input();
+
+	pr_debug("initializing SDRAM...\n");
+
+	mx28_mem_init();
+
+	pr_debug("DONE\n");
+}
+
+ENTRY_FUNCTION(prep_start_barebox_freescale_mx28evk, r0, r1, r2)
+{
+	void (*back)(unsigned long) = (void *)get_lr();
+
+	relocate_to_current_adr();
+	setup_c();
+
+	freescale_mx28evk_init();
+
+	back(0);
+}
-- 
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