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authorSascha Hauer <s.hauer@pengutronix.de>2015-01-20 14:52:39 +0100
committerSascha Hauer <s.hauer@pengutronix.de>2015-01-20 14:52:41 +0100
commit93ba78ece1eb153be1519b254b7ae4e1f8289b70 (patch)
tree859a830fe2f508cd90333c2fe09894e28f45f24c /arch/arm/boards/freescale-mx28-evk/lowlevel.c
parent49827f736a8495c18d5299baa97947774c0615ce (diff)
downloadbarebox-93ba78ece1eb153be1519b254b7ae4e1f8289b70.tar.gz
barebox-93ba78ece1eb153be1519b254b7ae4e1f8289b70.tar.xz
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>
Diffstat (limited to 'arch/arm/boards/freescale-mx28-evk/lowlevel.c')
-rw-r--r--arch/arm/boards/freescale-mx28-evk/lowlevel.c58
1 files changed, 56 insertions, 2 deletions
diff --git a/arch/arm/boards/freescale-mx28-evk/lowlevel.c b/arch/arm/boards/freescale-mx28-evk/lowlevel.c
index 3c7248ef6..a46a08051 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);
+}