apf27: add support for the armadeus APF27 board

Signed-off-by: Philippe Reynes <tremyfr@yahoo.fr>
Signed-off-by: Eric Jarrige <eric.jarrige@armadeus.org>
Signed-off-by: Nicolas Colombain <nicolas.colombain@armadeus.com>

4 files changed, 938 insertions, 0 deletions

diff --git a/board/armadeus/apf27/Makefile b/board/armadeus/apf27/Makefile
new file mode 100644
index 0000000..ec0cb03
--- /dev/null
+++ b/board/armadeus/apf27/Makefile
@@ -0,0 +1,30 @@
+#
+# (C) Copyright 2000-2004
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+# (C) Copyright 2012-2013
+# Eric Jarrige <eric.jarrige@armadeus.org>
+#
+# SPDX-License-Identifier:    GPL-2.0+
+#
+
+include $(TOPDIR)/config.mk
+
+LIB	= $(obj)lib$(BOARD).o
+
+COBJS	:= apf27.o
+SOBJS	:= lowlevel_init.o
+
+SRCS	:= $(COBJS:.o=.c) $(SOBJS:.o=.S)
+OBJS	:= $(addprefix $(obj),$(COBJS))
+SOBJS	:= $(addprefix $(obj),$(SOBJS))
+
+$(LIB):	$(obj).depend $(OBJS) $(SOBJS)
+	$(call cmd_link_o_target, $(OBJS) $(SOBJS))
+
+#########################################################################
+
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/board/armadeus/apf27/apf27.c b/board/armadeus/apf27/apf27.c
new file mode 100644
index 0000000..c0d9c41
--- /dev/null
+++ b/board/armadeus/apf27/apf27.c
@@ -0,0 +1,251 @@
+/*
+ * Copyright (C) 2008-2013 Eric Jarrige <eric.jarrige@armadeus.org>
+ *
+ * based on the files by
+ * Sascha Hauer, Pengutronix
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <environment.h>
+#include <jffs2/jffs2.h>
+#include <nand.h>
+#include <netdev.h>
+#include <asm/io.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/gpio.h>
+#include <asm/gpio.h>
+#include <asm/errno.h>
+#include "apf27.h"
+#include "crc.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ * Fuse bank 1 row 8 is "reserved for future use" and therefore available for
+ * customer use. The APF27 board uses this fuse to store the board revision:
+ * 0: initial board revision
+ * 1: first revision - Presence of the second RAM chip on the board is blown in
+ *     fuse bank 1 row 9  bit 0 - No hardware change
+ * N: to be defined
+ */
+static u32 get_board_rev(void)
+{
+	struct iim_regs *iim = (struct iim_regs *)IMX_IIM_BASE;
+
+	return readl(&iim->bank[1].fuse_regs[8]);
+}
+
+/*
+ * Fuse bank 1 row 9 is "reserved for future use" and therefore available for
+ * customer use. The APF27 board revision 1 uses the bit 0 to permanently store
+ * the presence of the second RAM chip
+ * 0: AFP27 with 1 RAM of 64 MiB
+ * 1: AFP27 with 2 RAM chips of 64 MiB each (128MB)
+ */
+static int get_num_ram_bank(void)
+{
+	struct iim_regs *iim = (struct iim_regs *)IMX_IIM_BASE;
+	int nr_dram_banks = 1;
+
+	if ((get_board_rev() > 0) && (CONFIG_NR_DRAM_BANKS > 1))
+		nr_dram_banks += readl(&iim->bank[1].fuse_regs[9]) & 0x01;
+	else
+		nr_dram_banks = CONFIG_NR_DRAM_POPULATED;
+
+	return nr_dram_banks;
+}
+
+static void apf27_port_init(int port, u32 gpio_dr, u32 ocr1, u32 ocr2,
+			    u32 iconfa1, u32 iconfa2, u32 iconfb1, u32 iconfb2,
+			    u32 icr1, u32 icr2, u32 imr, u32 gpio_dir, u32 gpr,
+			    u32 puen, u32 gius)
+{
+	struct gpio_port_regs *regs = (struct gpio_port_regs *)IMX_GPIO_BASE;
+
+	writel(gpio_dr,   &regs->port[port].gpio_dr);
+	writel(ocr1,      &regs->port[port].ocr1);
+	writel(ocr2,      &regs->port[port].ocr2);
+	writel(iconfa1,   &regs->port[port].iconfa1);
+	writel(iconfa2,   &regs->port[port].iconfa2);
+	writel(iconfb1,   &regs->port[port].iconfb1);
+	writel(iconfb2,   &regs->port[port].iconfb2);
+	writel(icr1,      &regs->port[port].icr1);
+	writel(icr2,      &regs->port[port].icr2);
+	writel(imr,       &regs->port[port].imr);
+	writel(gpio_dir,  &regs->port[port].gpio_dir);
+	writel(gpr,       &regs->port[port].gpr);
+	writel(puen,      &regs->port[port].puen);
+	writel(gius,      &regs->port[port].gius);
+}
+
+#define APF27_PORT_INIT(n) apf27_port_init(PORT##n, ACFG_DR_##n##_VAL,	  \
+	ACFG_OCR1_##n##_VAL, ACFG_OCR2_##n##_VAL, ACFG_ICFA1_##n##_VAL,	  \
+	ACFG_ICFA2_##n##_VAL, ACFG_ICFB1_##n##_VAL, ACFG_ICFB2_##n##_VAL, \
+	ACFG_ICR1_##n##_VAL, ACFG_ICR2_##n##_VAL, ACFG_IMR_##n##_VAL,	  \
+	ACFG_DDIR_##n##_VAL, ACFG_GPR_##n##_VAL, ACFG_PUEN_##n##_VAL,	  \
+	ACFG_GIUS_##n##_VAL)
+
+static void apf27_iomux_init(void)
+{
+	APF27_PORT_INIT(A);
+	APF27_PORT_INIT(B);
+	APF27_PORT_INIT(C);
+	APF27_PORT_INIT(D);
+	APF27_PORT_INIT(E);
+	APF27_PORT_INIT(F);
+}
+
+static int apf27_devices_init(void)
+{
+	int i;
+	unsigned int mode[] = {
+		PC5_PF_I2C2_DATA,
+		PC6_PF_I2C2_CLK,
+		PD17_PF_I2C_DATA,
+		PD18_PF_I2C_CLK,
+	};
+
+	for (i = 0; i < ARRAY_SIZE(mode); i++)
+		imx_gpio_mode(mode[i]);
+
+#ifdef CONFIG_MXC_UART
+	mx27_uart1_init_pins();
+#endif
+
+#ifdef CONFIG_FEC_MXC
+	mx27_fec_init_pins();
+#endif
+
+#ifdef CONFIG_MXC_MMC
+	mx27_sd2_init_pins();
+	imx_gpio_mode((GPIO_PORTF | GPIO_OUT | GPIO_PUEN | GPIO_GPIO | 16));
+	gpio_request(PC_PWRON, "pc_pwron");
+	gpio_set_value(PC_PWRON, 1);
+#endif
+	return 0;
+}
+
+static void apf27_setup_csx(void)
+{
+	struct weim_regs *weim = (struct weim_regs *)IMX_WEIM_BASE;
+
+	writel(ACFG_CS0U_VAL, &weim->cs0u);
+	writel(ACFG_CS0L_VAL, &weim->cs0l);
+	writel(ACFG_CS0A_VAL, &weim->cs0a);
+
+	writel(ACFG_CS1U_VAL, &weim->cs1u);
+	writel(ACFG_CS1L_VAL, &weim->cs1l);
+	writel(ACFG_CS1A_VAL, &weim->cs1a);
+
+	writel(ACFG_CS2U_VAL, &weim->cs2u);
+	writel(ACFG_CS2L_VAL, &weim->cs2l);
+	writel(ACFG_CS2A_VAL, &weim->cs2a);
+
+	writel(ACFG_CS3U_VAL, &weim->cs3u);
+	writel(ACFG_CS3L_VAL, &weim->cs3l);
+	writel(ACFG_CS3A_VAL, &weim->cs3a);
+
+	writel(ACFG_CS4U_VAL, &weim->cs4u);
+	writel(ACFG_CS4L_VAL, &weim->cs4l);
+	writel(ACFG_CS4A_VAL, &weim->cs4a);
+
+	writel(ACFG_CS5U_VAL, &weim->cs5u);
+	writel(ACFG_CS5L_VAL, &weim->cs5l);
+	writel(ACFG_CS5A_VAL, &weim->cs5a);
+
+	writel(ACFG_EIM_VAL, &weim->eim);
+}
+
+static void apf27_setup_port(void)
+{
+	struct system_control_regs *system =
+		(struct system_control_regs *)IMX_SYSTEM_CTL_BASE;
+
+	writel(ACFG_FMCR_VAL, &system->fmcr);
+}
+
+int board_init(void)
+{
+	gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
+
+	apf27_setup_csx();
+	apf27_setup_port();
+	apf27_iomux_init();
+	apf27_devices_init();
+
+	return 0;
+}
+
+int dram_init(void)
+{
+	gd->ram_size = get_ram_size((void *)PHYS_SDRAM_1, PHYS_SDRAM_1_SIZE);
+	if (get_num_ram_bank() > 1)
+		gd->ram_size += get_ram_size((void *)PHYS_SDRAM_2,
+					     PHYS_SDRAM_2_SIZE);
+
+	return 0;
+}
+
+void dram_init_banksize(void)
+{
+	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
+	gd->bd->bi_dram[0].size  = get_ram_size((void *)PHYS_SDRAM_1,
+						PHYS_SDRAM_1_SIZE);
+	gd->bd->bi_dram[1].start = PHYS_SDRAM_2;
+	if (get_num_ram_bank() > 1)
+		gd->bd->bi_dram[1].size = get_ram_size((void *)PHYS_SDRAM_2,
+					     PHYS_SDRAM_2_SIZE);
+	else
+		gd->bd->bi_dram[1].size = 0;
+}
+
+ulong board_get_usable_ram_top(ulong total_size)
+{
+	ulong ramtop;
+
+	if (get_num_ram_bank() > 1)
+		ramtop = PHYS_SDRAM_2 + get_ram_size((void *)PHYS_SDRAM_2,
+						     PHYS_SDRAM_2_SIZE);
+	else
+		ramtop = PHYS_SDRAM_1 + get_ram_size((void *)PHYS_SDRAM_1,
+						     PHYS_SDRAM_1_SIZE);
+
+	return ramtop;
+}
+
+int checkboard(void)
+{
+	printf("Board: Armadeus APF27 revision %d\n", get_board_rev());
+	return 0;
+}
+
+#ifdef CONFIG_SPL_BUILD
+inline void hang(void)
+{
+	for (;;)
+		;
+}
+
+void board_init_f(ulong bootflag)
+{
+	/*
+	 * copy ourselves from where we are running to where we were
+	 * linked at. Use ulong pointers as all addresses involved
+	 * are 4-byte-aligned.
+	 */
+	ulong *start_ptr, *end_ptr, *link_ptr, *run_ptr, *dst;
+	asm volatile ("ldr %0, =_start" : "=r"(start_ptr));
+	asm volatile ("ldr %0, =_end" : "=r"(end_ptr));
+	asm volatile ("ldr %0, =board_init_f" : "=r"(link_ptr));
+	asm volatile ("adr %0, board_init_f" : "=r"(run_ptr));
+	for (dst = start_ptr; dst < end_ptr; dst++)
+		*dst = *(dst+(run_ptr-link_ptr));
+
+	/*
+	 * branch to nand_boot's link-time address.
+	 */
+	asm volatile("ldr pc, =nand_boot");
+}
+#endif /* CONFIG_SPL_BUILD */
diff --git a/board/armadeus/apf27/apf27.h b/board/armadeus/apf27/apf27.h
new file mode 100644
index 0000000..64e7e4d
--- /dev/null
+++ b/board/armadeus/apf27/apf27.h
@@ -0,0 +1,489 @@
+/*
+ * Copyright (C) 2008-2013 Eric Jarrige <eric.jarrige@armadeus.org>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#ifndef __APF27_H
+#define __APF27_H
+
+/* FPGA program pin configuration */
+#define ACFG_FPGA_PWR	(GPIO_PORTF | 19)	/* FPGA prog pin  */
+#define ACFG_FPGA_PRG	(GPIO_PORTF | 11)	/* FPGA prog pin  */
+#define ACFG_FPGA_CLK	(GPIO_PORTF | 15)	/* FPGA clk pin   */
+#define ACFG_FPGA_RDATA	0xD6000000		/* FPGA data addr */
+#define ACFG_FPGA_WDATA	0xD6000000		/* FPGA data addr */
+#define ACFG_FPGA_INIT	(GPIO_PORTF | 12)	/* FPGA init pin  */
+#define ACFG_FPGA_DONE	(GPIO_PORTF | 9)	/* FPGA done pin  */
+#define ACFG_FPGA_RW	(GPIO_PORTF | 21)	/* FPGA done pin  */
+#define ACFG_FPGA_CS	(GPIO_PORTF | 22)	/* FPGA done pin  */
+#define ACFG_FPGA_SUSPEND (GPIO_PORTF | 10)	/* FPGA done pin  */
+#define ACFG_FPGA_RESET	(GPIO_PORTF | 7)	/* FPGA done pin  */
+
+/* MMC pin */
+#define PC_PWRON	(GPIO_PORTF | 16)
+
+/*
+ * MPU CLOCK source before PLL
+ * ACFG_CLK_FREQ (2/3 MPLL clock or ext 266 MHZ)
+ */
+#define ACFG_MPCTL0_VAL		0x01EF15D5	/* 399.000 MHz */
+#define ACFG_MPCTL1_VAL		0
+#define CONFIG_MPLL_FREQ	399
+
+#define ACFG_CLK_FREQ	(CONFIG_MPLL_FREQ*2/3) /* 266 MHz */
+
+/* Serial clock source before PLL (should be named ACFG_SYSPLL_CLK_FREQ)*/
+#define ACFG_SPCTL0_VAL		0x0475206F	/* 299.99937 MHz */
+#define ACFG_SPCTL1_VAL		0
+#define CONFIG_SPLL_FREQ	300		/* MHz */
+
+/* ARM bus frequency (have to be a CONFIG_MPLL_FREQ ratio) */
+#define CONFIG_ARM_FREQ		399	/* up to 400 MHz */
+
+/* external bus frequency (have to be a ACFG_CLK_FREQ ratio) */
+#define CONFIG_HCLK_FREQ	133	/* (ACFG_CLK_FREQ/2) */
+
+#define CONFIG_PERIF1_FREQ	16	/* 16.625 MHz UART, GPT, PWM */
+#define CONFIG_PERIF2_FREQ	33	/* 33.25 MHz CSPI and SDHC */
+#define CONFIG_PERIF3_FREQ	33	/* 33.25 MHz LCD */
+#define CONFIG_PERIF4_FREQ	33	/* 33.25 MHz CSI */
+#define CONFIG_SSI1_FREQ	66	/* 66.50 MHz SSI1 */
+#define CONFIG_SSI2_FREQ	66	/* 66.50 MHz SSI2 */
+#define CONFIG_MSHC_FREQ	66	/* 66.50 MHz MSHC */
+#define CONFIG_H264_FREQ	66	/* 66.50 MHz H264 */
+#define CONFIG_CLK0_DIV		3	/* Divide CLK0 by 4 */
+#define CONFIG_CLK0_EN		1	/* CLK0 enabled */
+
+/* external bus frequency (have to be a CONFIG_HCLK_FREQ ratio) */
+#define CONFIG_NFC_FREQ		44	/* NFC Clock up to 44 MHz wh 133MHz */
+
+/* external serial bus frequency (have to be a CONFIG_SPLL_FREQ ratio) */
+#define CONFIG_USB_FREQ		60	/* 60 MHz */
+
+/*
+ * SDRAM
+ */
+#if (ACFG_SDRAM_MBYTE_SYZE == 64) /* micron MT46H16M32LF -6 */
+/* micron 64MB */
+#define ACFG_SDRAM_NUM_COL		9  /* 8, 9, 10 or 11
+					    * column address bits
+					    */
+#define ACFG_SDRAM_NUM_ROW		13 /* 11, 12 or 13
+					    * row address bits
+					    */
+#define ACFG_SDRAM_REFRESH		3  /* 0=OFF 1=2048
+					    * 2=4096 3=8192 refresh
+					    */
+#define ACFG_SDRAM_EXIT_PWD		25 /* ns exit power
+					    * down delay
+					    */
+#define ACFG_SDRAM_W2R_DELAY		1  /* write to read
+					    * cycle delay > 0
+					    */
+#define ACFG_SDRAM_ROW_PRECHARGE_DELAY	18 /* ns */
+#define ACFG_SDRAM_TMRD_DELAY		2  /* Load mode register
+					    * cycle delay 1..4
+					    */
+#define ACFG_SDRAM_TWR_DELAY		1  /* LPDDR: 0=2ck 1=3ck
+					    * SDRAM: 0=1ck 1=2ck
+					    */
+#define ACFG_SDRAM_RAS_DELAY		42 /* ns ACTIVE-to-PRECHARGE delay */
+#define ACFG_SDRAM_RRD_DELAY		12 /* ns ACTIVE-to-ACTIVE delay */
+#define ACFG_SDRAM_RCD_DELAY		18 /* ns Row to Column delay */
+#define ACFG_SDRAM_RC_DELAY		70 /* ns Row cycle delay (tRFC
+					    * refresh to command)
+					    */
+#define ACFG_SDRAM_CLOCK_CYCLE_CL_1	0 /* ns clock cycle time
+					   * estimated fo CL=1
+					   * 0=force 3 for lpddr
+					   */
+#define ACFG_SDRAM_PARTIAL_ARRAY_SR	0  /* 0=full 1=half 2=quater
+					    * 3=Eighth 4=Sixteenth
+					    */
+#define ACFG_SDRAM_DRIVE_STRENGH	0  /* 0=Full-strength 1=half
+					    * 2=quater 3=Eighth
+					    */
+#define ACFG_SDRAM_BURST_LENGTH		3  /* 2^N BYTES (N=0..3) */
+#define ACFG_SDRAM_SINGLE_ACCESS	0  /* 1= single access
+					    * 0 = Burst mode
+					    */
+#endif
+
+#if (ACFG_SDRAM_MBYTE_SYZE == 128)
+/* micron 128MB */
+#define ACFG_SDRAM_NUM_COL		9  /* 8, 9, 10 or 11
+					    * column address bits
+					    */
+#define ACFG_SDRAM_NUM_ROW		14 /* 11, 12 or 13
+					    * row address bits
+					    */
+#define ACFG_SDRAM_REFRESH		3  /* 0=OFF 1=2048
+					    * 2=4096 3=8192 refresh
+					    */
+#define ACFG_SDRAM_EXIT_PWD		25 /* ns exit power
+					    * down delay
+					    */
+#define ACFG_SDRAM_W2R_DELAY		1  /* write to read
+					    * cycle delay > 0
+					    */
+#define ACFG_SDRAM_ROW_PRECHARGE_DELAY	18 /* ns */
+#define ACFG_SDRAM_TMRD_DELAY		2  /* Load mode register
+					    * cycle delay 1..4
+					    */
+#define ACFG_SDRAM_TWR_DELAY		1  /* LPDDR: 0=2ck 1=3ck
+					    * SDRAM: 0=1ck 1=2ck
+					    */
+#define ACFG_SDRAM_RAS_DELAY		42 /* ns ACTIVE-to-PRECHARGE delay */
+#define ACFG_SDRAM_RRD_DELAY		12 /* ns ACTIVE-to-ACTIVE delay */
+#define ACFG_SDRAM_RCD_DELAY		18 /* ns Row to Column delay */
+#define ACFG_SDRAM_RC_DELAY		70 /* ns Row cycle delay (tRFC
+					    * refresh to command)
+					    */
+#define ACFG_SDRAM_CLOCK_CYCLE_CL_1	0 /* ns clock cycle time
+					   * estimated fo CL=1
+					   * 0=force 3 for lpddr
+					   */
+#define ACFG_SDRAM_PARTIAL_ARRAY_SR	0  /* 0=full 1=half 2=quater
+					    * 3=Eighth 4=Sixteenth
+					    */
+#define ACFG_SDRAM_DRIVE_STRENGH	0  /* 0=Full-strength 1=half
+					    * 2=quater 3=Eighth
+					    */
+#define ACFG_SDRAM_BURST_LENGTH		3  /* 2^N BYTES (N=0..3) */
+#define ACFG_SDRAM_SINGLE_ACCESS	0  /* 1= single access
+					    * 0 = Burst mode
+					    */
+#endif
+
+#if (ACFG_SDRAM_MBYTE_SYZE == 256)
+/* micron 256MB */
+#define ACFG_SDRAM_NUM_COL		10  /* 8, 9, 10 or 11
+					     * column address bits
+					     */
+#define ACFG_SDRAM_NUM_ROW		14 /* 11, 12 or 13
+					    * row address bits
+					    */
+#define ACFG_SDRAM_REFRESH		3  /* 0=OFF 1=2048
+					    * 2=4096 3=8192 refresh
+					    */
+#define ACFG_SDRAM_EXIT_PWD		25 /* ns exit power
+					    * down delay
+					    */
+#define ACFG_SDRAM_W2R_DELAY		1  /* write to read cycle
+					    * delay > 0
+					    */
+#define ACFG_SDRAM_ROW_PRECHARGE_DELAY	18 /* ns */
+#define ACFG_SDRAM_TMRD_DELAY		2  /* Load mode register
+					    * cycle delay 1..4
+					    */
+#define ACFG_SDRAM_TWR_DELAY		1  /* LPDDR: 0=2ck 1=3ck
+					    * SDRAM: 0=1ck 1=2ck
+					    */
+#define ACFG_SDRAM_RAS_DELAY		42 /* ns ACTIVE-to-PRECHARGE delay */
+#define ACFG_SDRAM_RRD_DELAY		12 /* ns ACTIVE-to-ACTIVE delay */
+#define ACFG_SDRAM_RCD_DELAY		18 /* ns Row to Column delay */
+#define ACFG_SDRAM_RC_DELAY		70 /* ns Row cycle delay (tRFC
+					    * refresh to command)
+					    */
+#define ACFG_SDRAM_CLOCK_CYCLE_CL_1	0 /* ns clock cycle time
+					   * estimated fo CL=1
+					   * 0=force 3 for lpddr
+					   */
+#define ACFG_SDRAM_PARTIAL_ARRAY_SR	0  /* 0=full 1=half 2=quater
+					    * 3=Eighth 4=Sixteenth
+					    */
+#define ACFG_SDRAM_DRIVE_STRENGH	0  /* 0=Full-strength
+					    * 1=half
+					    * 2=quater
+					    * 3=Eighth
+					    */
+#define ACFG_SDRAM_BURST_LENGTH		3  /* 2^N BYTES (N=0..3) */
+#define ACFG_SDRAM_SINGLE_ACCESS	0  /* 1= single access
+					    * 0 = Burst mode
+					    */
+#endif
+
+/*
+ * External interface
+ */
+/*
+ * CSCRxU_VAL:
+ * 31| x | x | x x |x x x x| x x | x | x  |x x x x|16
+ *   |SP |WP | BCD |  BCS  | PSZ |PME|SYNC|  DOL  |
+ *
+ * 15| x x  | x x x x x x | x | x x x x | x x x x |0
+ *   | CNC  |     WSC     |EW |   WWS   |   EDC   |
+ *
+ * CSCRxL_VAL:
+ * 31|  x x x x  | x x x x  | x x x x  | x x x x  |16
+ *   |    OEA    |   OEN    |   EBWA   |   EBWN   |
+ * 15|x x x x| x |x x x |x x x x| x | x | x  | x  | 0
+ *   |  CSA  |EBC| DSZ  |  CSN  |PSR|CRE|WRAP|CSEN|
+ *
+ * CSCRxA_VAL:
+ * 31|  x x x x  | x x x x  | x x x x  | x x x x  |16
+ *   |   EBRA    |   EBRN   |   RWA    |   RWN    |
+ * 15| x | x x |x x x|x x|x x|x x| x | x | x  | x | 0
+ *   |MUM| LAH | LBN |LBA|DWW|DCT|WWU|AGE|CNC2|FCE|
+ */
+
+/* CS0 configuration for 16 bit nor flash */
+#define ACFG_CS0U_VAL	0x0000CC03
+#define ACFG_CS0L_VAL	0xa0330D01
+#define ACFG_CS0A_VAL	0x00220800
+
+#define ACFG_CS1U_VAL	0x00000f00
+#define ACFG_CS1L_VAL	0x00000D01
+#define ACFG_CS1A_VAL	0
+
+#define ACFG_CS2U_VAL	0
+#define ACFG_CS2L_VAL	0
+#define ACFG_CS2A_VAL	0
+
+#define ACFG_CS3U_VAL	0
+#define ACFG_CS3L_VAL	0
+#define ACFG_CS3A_VAL	0
+
+#define ACFG_CS4U_VAL	0
+#define ACFG_CS4L_VAL	0
+#define ACFG_CS4A_VAL	0
+
+/* FPGA 16 bit data bus */
+#define ACFG_CS5U_VAL	0x00000600
+#define ACFG_CS5L_VAL	0x00000D01
+#define ACFG_CS5A_VAL	0
+
+#define ACFG_EIM_VAL	0x00002200
+
+
+/*
+ * FPGA specific settings
+ */
+
+/* CLKO */
+#define ACFG_CCSR_VAL 0x00000305
+/* drive strength CLKO set to 2 */
+#define ACFG_DSCR10_VAL 0x00020000
+/* drive strength A1..A12 set to 2 */
+#define ACFG_DSCR3_VAL 0x02AAAAA8
+/* drive strength ctrl */
+#define ACFG_DSCR7_VAL 0x00020880
+/* drive strength data */
+#define ACFG_DSCR2_VAL 0xAAAAAAAA
+
+
+/*
+ * Default configuration for GPIOs and peripherals
+ */
+#define ACFG_DDIR_A_VAL		0x00000000
+#define ACFG_OCR1_A_VAL		0x00000000
+#define ACFG_OCR2_A_VAL		0x00000000
+#define ACFG_ICFA1_A_VAL	0xFFFFFFFF
+#define ACFG_ICFA2_A_VAL	0xFFFFFFFF
+#define ACFG_ICFB1_A_VAL	0xFFFFFFFF
+#define ACFG_ICFB2_A_VAL	0xFFFFFFFF
+#define ACFG_DR_A_VAL		0x00000000
+#define ACFG_GIUS_A_VAL		0xFFFFFFFF
+#define ACFG_ICR1_A_VAL		0x00000000
+#define ACFG_ICR2_A_VAL		0x00000000
+#define ACFG_IMR_A_VAL		0x00000000
+#define ACFG_GPR_A_VAL		0x00000000
+#define ACFG_PUEN_A_VAL		0xFFFFFFFF
+
+#define ACFG_DDIR_B_VAL		0x00000000
+#define ACFG_OCR1_B_VAL		0x00000000
+#define ACFG_OCR2_B_VAL		0x00000000
+#define ACFG_ICFA1_B_VAL	0xFFFFFFFF
+#define ACFG_ICFA2_B_VAL	0xFFFFFFFF
+#define ACFG_ICFB1_B_VAL	0xFFFFFFFF
+#define ACFG_ICFB2_B_VAL	0xFFFFFFFF
+#define ACFG_DR_B_VAL		0x00000000
+#define ACFG_GIUS_B_VAL		0xFF3FFFF0
+#define ACFG_ICR1_B_VAL		0x00000000
+#define ACFG_ICR2_B_VAL		0x00000000
+#define ACFG_IMR_B_VAL		0x00000000
+#define ACFG_GPR_B_VAL		0x00000000
+#define ACFG_PUEN_B_VAL		0xFFFFFFFF
+
+#define ACFG_DDIR_C_VAL		0x00000000
+#define ACFG_OCR1_C_VAL		0x00000000
+#define ACFG_OCR2_C_VAL		0x00000000
+#define ACFG_ICFA1_C_VAL	0xFFFFFFFF
+#define ACFG_ICFA2_C_VAL	0xFFFFFFFF
+#define ACFG_ICFB1_C_VAL	0xFFFFFFFF
+#define ACFG_ICFB2_C_VAL	0xFFFFFFFF
+#define ACFG_DR_C_VAL		0x00000000
+#define ACFG_GIUS_C_VAL		0xFFFFC07F
+#define ACFG_ICR1_C_VAL		0x00000000
+#define ACFG_ICR2_C_VAL		0x00000000
+#define ACFG_IMR_C_VAL		0x00000000
+#define ACFG_GPR_C_VAL		0x00000000
+#define ACFG_PUEN_C_VAL		0xFFFFFF87
+
+#define ACFG_DDIR_D_VAL		0x00000000
+#define ACFG_OCR1_D_VAL		0x00000000
+#define ACFG_OCR2_D_VAL		0x00000000
+#define ACFG_ICFA1_D_VAL	0xFFFFFFFF
+#define ACFG_ICFA2_D_VAL	0xFFFFFFFF
+#define ACFG_ICFB1_D_VAL	0xFFFFFFFF
+#define ACFG_ICFB2_D_VAL	0xFFFFFFFF
+#define ACFG_DR_D_VAL		0x00000000
+#define ACFG_GIUS_D_VAL		0xFFFFFFFF
+#define ACFG_ICR1_D_VAL		0x00000000
+#define ACFG_ICR2_D_VAL		0x00000000
+#define ACFG_IMR_D_VAL		0x00000000
+#define ACFG_GPR_D_VAL		0x00000000
+#define ACFG_PUEN_D_VAL		0xFFFFFFFF
+
+#define ACFG_DDIR_E_VAL		0x00000000
+#define ACFG_OCR1_E_VAL		0x00000000
+#define ACFG_OCR2_E_VAL		0x00000000
+#define ACFG_ICFA1_E_VAL	0xFFFFFFFF
+#define ACFG_ICFA2_E_VAL	0xFFFFFFFF
+#define ACFG_ICFB1_E_VAL	0xFFFFFFFF
+#define ACFG_ICFB2_E_VAL	0xFFFFFFFF
+#define ACFG_DR_E_VAL		0x00000000
+#define ACFG_GIUS_E_VAL		0xFCFFCCF8
+#define ACFG_ICR1_E_VAL		0x00000000
+#define ACFG_ICR2_E_VAL		0x00000000
+#define ACFG_IMR_E_VAL		0x00000000
+#define ACFG_GPR_E_VAL		0x00000000
+#define ACFG_PUEN_E_VAL		0xFFFFFFFF
+
+#define ACFG_DDIR_F_VAL		0x00000000
+#define ACFG_OCR1_F_VAL		0x00000000
+#define ACFG_OCR2_F_VAL		0x00000000
+#define ACFG_ICFA1_F_VAL	0xFFFFFFFF
+#define ACFG_ICFA2_F_VAL	0xFFFFFFFF
+#define ACFG_ICFB1_F_VAL	0xFFFFFFFF
+#define ACFG_ICFB2_F_VAL	0xFFFFFFFF
+#define ACFG_DR_F_VAL		0x00000000
+#define ACFG_GIUS_F_VAL		0xFF7F8000
+#define ACFG_ICR1_F_VAL		0x00000000
+#define ACFG_ICR2_F_VAL		0x00000000
+#define ACFG_IMR_F_VAL		0x00000000
+#define ACFG_GPR_F_VAL		0x00000000
+#define ACFG_PUEN_F_VAL		0xFFFFFFFF
+
+/* Enforce DDR signal strengh & enable USB/PP/DMA burst override bits */
+#define ACFG_GPCR_VAL		0x0003000F
+
+#define ACFG_ESDMISC_VAL	ESDMISC_LHD+ESDMISC_MDDREN
+
+/* FMCR select num LPDDR RAMs and nand 16bits, 2KB pages */
+#if (CONFIG_NR_DRAM_BANKS == 1)
+#define ACFG_FMCR_VAL 0xFFFFFFF9
+#elif (CONFIG_NR_DRAM_BANKS == 2)
+#define ACFG_FMCR_VAL 0xFFFFFFFB
+#endif
+
+#define ACFG_AIPI1_PSR0_VAL	0x20040304
+#define ACFG_AIPI1_PSR1_VAL	0xDFFBFCFB
+#define ACFG_AIPI2_PSR0_VAL	0x00000000
+#define ACFG_AIPI2_PSR1_VAL	0xFFFFFFFF
+
+/* PCCR enable DMA FEC I2C1 IIM SDHC1 */
+#define ACFG_PCCR0_VAL		0x05070410
+#define ACFG_PCCR1_VAL		0xA14A0608
+
+/*
+ * From here, there should not be any user configuration.
+ * All Equations are automatic
+ */
+
+/* fixme none integer value (7.5ns) => 2*hclock = 15ns */
+#define ACFG_2XHCLK_LGTH	(2000/CONFIG_HCLK_FREQ)	/* ns */
+
+/* USB 60 MHz ; ARM up to 400; HClK up to 133MHz*/
+#define CSCR_MASK 0x0300800D
+
+#define ACFG_CSCR_VAL						\
+	(CSCR_MASK						\
+	|((((CONFIG_SPLL_FREQ/CONFIG_USB_FREQ)-1)&0x07) << 28)	\
+	|((((CONFIG_MPLL_FREQ/CONFIG_ARM_FREQ)-1)&0x03) << 12)	\
+	|((((ACFG_CLK_FREQ/CONFIG_HCLK_FREQ)-1)&0x03) << 8))
+
+/* SSIx CLKO NFC H264 MSHC */
+#define ACFG_PCDR0_VAL\
+	(((((ACFG_CLK_FREQ/CONFIG_MSHC_FREQ)-1)&0x3F)<<0)	\
+	|((((CONFIG_HCLK_FREQ/CONFIG_NFC_FREQ)-1)&0x0F)<<6)	\
+	|(((((ACFG_CLK_FREQ/CONFIG_H264_FREQ)-2)*2)&0x3F)<<10)\
+	|(((((ACFG_CLK_FREQ/CONFIG_SSI1_FREQ)-2)*2)&0x3F)<<16)\
+	|(((CONFIG_CLK0_DIV)&0x07)<<22)\
+	|(((CONFIG_CLK0_EN)&0x01)<<25)\
+	|(((((ACFG_CLK_FREQ/CONFIG_SSI2_FREQ)-2)*2)&0x3F)<<26))
+
+/* PERCLKx  */
+#define ACFG_PCDR1_VAL\
+	(((((ACFG_CLK_FREQ/CONFIG_PERIF1_FREQ)-1)&0x3F)<<0)	\
+	|((((ACFG_CLK_FREQ/CONFIG_PERIF2_FREQ)-1)&0x3F)<<8)	\
+	|((((ACFG_CLK_FREQ/CONFIG_PERIF3_FREQ)-1)&0x3F)<<16)	\
+	|((((ACFG_CLK_FREQ/CONFIG_PERIF4_FREQ)-1)&0x3F)<<24))
+
+/* SDRAM controller programming Values */
+#if (((2*ACFG_SDRAM_CLOCK_CYCLE_CL_1) > (3*ACFG_2XHCLK_LGTH)) || \
+	(ACFG_SDRAM_CLOCK_CYCLE_CL_1 < 1))
+#define REG_FIELD_SCL_VAL 3
+#define REG_FIELD_SCLIMX_VAL 0
+#else
+#define REG_FIELD_SCL_VAL\
+	((2*ACFG_SDRAM_CLOCK_CYCLE_CL_1+ACFG_2XHCLK_LGTH-1)/ \
+		ACFG_2XHCLK_LGTH)
+#define REG_FIELD_SCLIMX_VAL REG_FIELD_SCL_VAL
+#endif
+
+#if ((2*ACFG_SDRAM_RC_DELAY) > (16*ACFG_2XHCLK_LGTH))
+#define REG_FIELD_SRC_VAL 0
+#else
+#define REG_FIELD_SRC_VAL\
+	((2*ACFG_SDRAM_RC_DELAY+ACFG_2XHCLK_LGTH-1)/ \
+		ACFG_2XHCLK_LGTH)
+#endif
+
+/* TBD Power down timer ; PRCT Bit Field Encoding; burst length 8 ; FP = 0*/
+#define REG_ESDCTL_BASE_CONFIG (0x80020485\
+				| (((ACFG_SDRAM_NUM_ROW-11)&0x7)<<24)\
+				| (((ACFG_SDRAM_NUM_COL-8)&0x3)<<20)\
+				| (((ACFG_SDRAM_REFRESH)&0x7)<<13))
+
+#define ACFG_NORMAL_RW_CMD	((0x0<<28)+REG_ESDCTL_BASE_CONFIG)
+#define ACFG_PRECHARGE_CMD	((0x1<<28)+REG_ESDCTL_BASE_CONFIG)
+#define ACFG_AUTOREFRESH_CMD	((0x2<<28)+REG_ESDCTL_BASE_CONFIG)
+#define ACFG_SET_MODE_REG_CMD	((0x3<<28)+REG_ESDCTL_BASE_CONFIG)
+
+/* ESDRAMC Configuration Registers : force CL=3 to lpddr */
+#define ACFG_SDRAM_ESDCFG_REGISTER_VAL (0x0\
+	| (((((2*ACFG_SDRAM_EXIT_PWD+ACFG_2XHCLK_LGTH-1)/ \
+		ACFG_2XHCLK_LGTH)-1)&0x3)<<21)\
+	| (((ACFG_SDRAM_W2R_DELAY-1)&0x1)<<20)\
+	| (((((2*ACFG_SDRAM_ROW_PRECHARGE_DELAY+ \
+		ACFG_2XHCLK_LGTH-1)/ACFG_2XHCLK_LGTH)-1)&0x3)<<18) \
+	| (((ACFG_SDRAM_TMRD_DELAY-1)&0x3)<<16)\
+	| (((ACFG_SDRAM_TWR_DELAY)&0x1)<<15)\
+	| (((((2*ACFG_SDRAM_RAS_DELAY+ACFG_2XHCLK_LGTH-1)/ \
+		ACFG_2XHCLK_LGTH)-1)&0x7)<<12) \
+	| (((((2*ACFG_SDRAM_RRD_DELAY+ACFG_2XHCLK_LGTH-1)/ \
+		ACFG_2XHCLK_LGTH)-1)&0x3)<<10) \
+	| (((REG_FIELD_SCLIMX_VAL)&0x3)<<8)\
+	| (((((2*ACFG_SDRAM_RCD_DELAY+ACFG_2XHCLK_LGTH-1)/ \
+		ACFG_2XHCLK_LGTH)-1)&0x7)<<4) \
+	| (((REG_FIELD_SRC_VAL)&0x0F)<<0))
+
+/* Issue Mode register Command to SDRAM */
+#define ACFG_SDRAM_MODE_REGISTER_VAL\
+	((((ACFG_SDRAM_BURST_LENGTH)&0x7)<<(0))\
+	| (((REG_FIELD_SCL_VAL)&0x7)<<(4))\
+	| ((0)<<(3)) /* sequentiql access */ \
+	/*| (((ACFG_SDRAM_SINGLE_ACCESS)&0x1)<<(1))*/)
+
+/* Issue Extended Mode register Command to SDRAM */
+#define ACFG_SDRAM_EXT_MODE_REGISTER_VAL\
+	((ACFG_SDRAM_PARTIAL_ARRAY_SR<<0)\
+	| (ACFG_SDRAM_DRIVE_STRENGH<<(5))\
+	| (1<<(ACFG_SDRAM_NUM_COL+ACFG_SDRAM_NUM_ROW+1+2)))
+
+/* Issue Precharge all Command to SDRAM */
+#define ACFG_SDRAM_PRECHARGE_ALL_VAL (1<<10)
+
+#endif /* __APF27_H */
diff --git a/board/armadeus/apf27/lowlevel_init.S b/board/armadeus/apf27/lowlevel_init.S
new file mode 100644
index 0000000..4293cb1
--- /dev/null
+++ b/board/armadeus/apf27/lowlevel_init.S
@@ -0,0 +1,168 @@
+/*
+ * (C) Copyright 2013 Philippe Reynes <tremyfr@yahoo.fr>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <config.h>
+#include <generated/asm-offsets.h>
+#include <version.h>
+#include <asm/macro.h>
+#include <asm/arch/imx-regs.h>
+#include "apf27.h"
+
+	.macro init_aipi
+	/*
+	 * setup AIPI1 and AIPI2
+	 */
+	write32 AIPI1_PSR0, ACFG_AIPI1_PSR0_VAL
+	write32 AIPI1_PSR1, ACFG_AIPI1_PSR1_VAL
+	write32 AIPI2_PSR0, ACFG_AIPI2_PSR0_VAL
+	write32 AIPI2_PSR1, ACFG_AIPI2_PSR1_VAL
+
+	/* Change SDRAM signal strengh */
+	ldr r0, =GPCR
+	ldr r1, =ACFG_GPCR_VAL
+	ldr r5, [r0]
+	orr r5, r5, r1
+	str r5, [r0]
+
+	.endm /* init_aipi */
+
+	.macro init_clock
+	ldr r0, =CSCR
+	/* disable MPLL/SPLL first */
+	ldr r1, [r0]
+	bic r1, r1, #(CSCR_MPEN|CSCR_SPEN)
+	str r1, [r0]
+
+ 	/*
+	 * pll clock initialization predefined in apf27.h
+	 */
+	write32 MPCTL0, ACFG_MPCTL0_VAL
+	write32 SPCTL0, ACFG_SPCTL0_VAL
+
+	write32 CSCR, ACFG_CSCR_VAL|CSCR_MPLL_RESTART|CSCR_SPLL_RESTART
+
+	/*
+	 * add some delay here
+	 */
+	mov r1, #0x1000
+	1:  subs r1, r1, #0x1
+	bne 1b
+
+	/* peripheral clock divider */
+	write32 PCDR0, ACFG_PCDR0_VAL
+	write32 PCDR1, ACFG_PCDR1_VAL
+
+	/* Configure PCCR0 and PCCR1 */
+	write32 PCCR0, ACFG_PCCR0_VAL
+	write32 PCCR1, ACFG_PCCR1_VAL
+
+	.endm /* init_clock */
+
+	.macro init_ddr
+	/* wait for SDRAM/LPDDR ready (SDRAMRDY) */
+	ldr		r0, =IMX_ESD_BASE
+	ldr		r4, =ESDMISC_SDRAM_RDY
+2:	ldr		r1, [r0, #ESDMISC_ROF]
+	ands		r1, r1, r4
+	bpl		2b
+
+	/* LPDDR Soft Reset Mobile/Low Power DDR SDRAM. */
+	ldr		r0, =IMX_ESD_BASE
+	ldr		r4, =ACFG_ESDMISC_VAL
+	orr		r1, r4, #ESDMISC_MDDR_DL_RST
+	str		r1, [r0, #ESDMISC_ROF]
+
+	/* Hold for more than 200ns */
+	ldr		r1, =0x10000
+1:	subs		r1, r1, #0x1
+	bne		1b
+
+	str		r4, [r0]
+
+	ldr		r0, =IMX_ESD_BASE
+	ldr		r1, =ACFG_SDRAM_ESDCFG_REGISTER_VAL
+	str		r1, [r0, #ESDCFG0_ROF]
+
+	ldr		r0, =IMX_ESD_BASE
+	ldr		r1, =ACFG_PRECHARGE_CMD
+	str		r1, [r0, #ESDCTL0_ROF]
+
+	/* write8(0xA0001000, any value) */
+	ldr		r1, =PHYS_SDRAM_1+ACFG_SDRAM_PRECHARGE_ALL_VAL
+	strb		r2, [r1]
+
+	ldr		r1, =ACFG_AUTOREFRESH_CMD
+	str		r1, [r0, #ESDCTL0_ROF]
+
+	ldr 		r4, =PHYS_SDRAM_1	/* CSD0 base address	*/
+
+	ldr 		r6,=0x7		/* load loop counter	*/
+1:	str 		r5,[r4]		/* run auto-refresh cycle to array 0 */
+	subs 		r6,r6,#1
+	bne 1b
+
+	ldr		r1, =ACFG_SET_MODE_REG_CMD
+	str		r1, [r0, #ESDCTL0_ROF]
+
+	/* set standard mode register */
+	ldr		r4, = PHYS_SDRAM_1+ACFG_SDRAM_MODE_REGISTER_VAL
+	strb		r2, [r4]
+
+	/* set extended mode register */
+	ldr		r4, =PHYS_SDRAM_1+ACFG_SDRAM_EXT_MODE_REGISTER_VAL
+	strb		r5, [r4]
+
+	ldr		r1, =ACFG_NORMAL_RW_CMD
+	str		r1, [r0, #ESDCTL0_ROF]
+
+	/* 2nd sdram */
+	ldr		r0, =IMX_ESD_BASE
+	ldr		r1, =ACFG_SDRAM_ESDCFG_REGISTER_VAL
+	str		r1, [r0, #ESDCFG1_ROF]
+
+	ldr		r0, =IMX_ESD_BASE
+	ldr		r1, =ACFG_PRECHARGE_CMD
+	str		r1, [r0, #ESDCTL1_ROF]
+
+	/* write8(0xB0001000, any value) */
+	ldr		r1, =PHYS_SDRAM_2+ACFG_SDRAM_PRECHARGE_ALL_VAL
+	strb		r2, [r1]
+
+	ldr		r1, =ACFG_AUTOREFRESH_CMD
+	str		r1, [r0, #ESDCTL1_ROF]
+
+	ldr 		r4, =PHYS_SDRAM_2	/* CSD1 base address */
+
+	ldr 		r6,=0x7		/* load loop counter */
+1:	str 		r5,[r4]		/* run auto-refresh cycle to array 0 */
+	subs 		r6,r6,#1
+	bne 1b
+
+	ldr		r1, =ACFG_SET_MODE_REG_CMD
+	str		r1, [r0, #ESDCTL1_ROF]
+
+	/* set standard mode register */
+	ldr		r4, =PHYS_SDRAM_2+ACFG_SDRAM_MODE_REGISTER_VAL
+	strb		r2, [r4]
+
+	/* set extended mode register */
+	ldr		r4, =PHYS_SDRAM_2+ACFG_SDRAM_EXT_MODE_REGISTER_VAL
+	strb		r2, [r4]
+
+	ldr		r1, =ACFG_NORMAL_RW_CMD
+	str		r1, [r0, #ESDCTL1_ROF]
+	.endm /* init_ddr */
+
+.globl lowlevel_init
+lowlevel_init:
+
+	init_aipi
+	init_clock
+#ifdef CONFIG_SPL_BUILD
+	init_ddr
+#endif
+
+	mov	pc, lr