MX31: Add NAND SPL boot support to i.MX31 PDK board.

Signed-off-by: Magnus Lilja <lilja.magnus@gmail.com>

2 files changed, 97 insertions, 0 deletions

diff --git a/board/freescale/mx31pdk/config.mk b/board/freescale/mx31pdk/config.mk
index d34dc02d96..dcaa09ff83 100644
--- a/board/freescale/mx31pdk/config.mk
+++ b/board/freescale/mx31pdk/config.mk
@@ -1 +1,5 @@
+ifdef CONFIG_NAND_SPL
+TEXT_BASE = 0x87ec0000
+else
 TEXT_BASE = 0x87f00000
+endif
diff --git a/board/freescale/mx31pdk/lowlevel_init.S b/board/freescale/mx31pdk/lowlevel_init.S
new file mode 100644
index 0000000000..cd0503ec3a
--- /dev/null
+++ b/board/freescale/mx31pdk/lowlevel_init.S
@@ -0,0 +1,93 @@
+/*
+ * (C) Copyright 2009 Magnus Lilja <lilja.magnus@gmail.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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 <config.h>
+#include <asm/arch/mx31-regs.h>
+#include <asm/macro.h>
+
+.globl lowlevel_init
+lowlevel_init:
+	/* Also setup the Peripheral Port Remap register inside the core */
+	ldr	r0, =ARM_PPMRR      /* start from AIPS 2GB region */
+	mcr	p15, 0, r0, c15, c2, 4
+
+	write32	IPU_CONF, IPU_CONF_DI_EN
+	write32	CCM_CCMR, CCM_CCMR_SETUP
+
+	wait_timer	0x40000
+
+	write32	CCM_CCMR, CCM_CCMR_SETUP | CCMR_MPE
+	write32	CCM_CCMR, (CCM_CCMR_SETUP | CCMR_MPE) & ~CCMR_MDS
+
+	/* Set up clock to 532MHz */
+	write32	CCM_PDR0, CCM_PDR0_SETUP_532MHZ
+	write32	CCM_MPCTL, CCM_MPCTL_SETUP_532MHZ
+
+	write32	CCM_SPCTL, PLL_PD(1) | PLL_MFD(4) | PLL_MFI(12) | PLL_MFN(1)
+
+	/* Set up MX31 DDR pins */
+	write32	IOMUXC_SW_PAD_CTL_SDCKE1_SDCLK_SDCLK_B, 0
+	write32	IOMUXC_SW_PAD_CTL_CAS_SDWE_SDCKE0, 0
+	write32	IOMUXC_SW_PAD_CTL_BCLK_RW_RAS, 0
+	write32	IOMUXC_SW_PAD_CTL_CS2_CS3_CS4, 0x1000
+	write32	IOMUXC_SW_PAD_CTL_DQM3_EB0_EB1, 0
+	write32	IOMUXC_SW_PAD_CTL_DQM0_DQM1_DQM2, 0
+	write32	IOMUXC_SW_PAD_CTL_SD29_SD30_SD31, 0
+	write32	IOMUXC_SW_PAD_CTL_SD26_SD27_SD28, 0
+	write32	IOMUXC_SW_PAD_CTL_SD23_SD24_SD25, 0
+	write32	IOMUXC_SW_PAD_CTL_SD20_SD21_SD22, 0
+	write32	IOMUXC_SW_PAD_CTL_SD17_SD18_SD19, 0
+	write32	IOMUXC_SW_PAD_CTL_SD14_SD15_SD16, 0
+	write32	IOMUXC_SW_PAD_CTL_SD11_SD12_SD13, 0
+	write32	IOMUXC_SW_PAD_CTL_SD8_SD9_SD10, 0
+	write32	IOMUXC_SW_PAD_CTL_SD5_SD6_SD7, 0
+	write32	IOMUXC_SW_PAD_CTL_SD2_SD3_SD4, 0
+	write32	IOMUXC_SW_PAD_CTL_SDBA0_SD0_SD1, 0
+	write32	IOMUXC_SW_PAD_CTL_A24_A25_SDBA1, 0
+	write32	IOMUXC_SW_PAD_CTL_A21_A22_A23, 0
+	write32	IOMUXC_SW_PAD_CTL_A18_A19_A20, 0
+	write32	IOMUXC_SW_PAD_CTL_A15_A16_A17, 0
+	write32	IOMUXC_SW_PAD_CTL_A12_A13_A14, 0
+	write32	IOMUXC_SW_PAD_CTL_A10_MA10_A11, 0
+	write32	IOMUXC_SW_PAD_CTL_A7_A8_A9, 0
+	write32	IOMUXC_SW_PAD_CTL_A4_A5_A6, 0
+	write32	IOMUXC_SW_PAD_CTL_A1_A2_A3, 0
+	write32	IOMUXC_SW_PAD_CTL_VPG0_VPG1_A0, 0
+
+	/* Set up MX31 DDR Memory Controller */
+	write32	WEIM_ESDMISC, ESDMISC_MDDR_SETUP
+	write32	WEIM_ESDCFG0, ESDCFG0_MDDR_SETUP
+
+	/* Perform DDR init sequence */
+	write32	WEIM_ESDCTL0, ESDCTL_PRECHARGE
+	write32	CSD0_BASE | 0x0f00, 0x12344321
+	write32	WEIM_ESDCTL0, ESDCTL_AUTOREFRESH
+	write32	CSD0_BASE, 0x12344321
+	write32	CSD0_BASE, 0x12344321
+	write32	WEIM_ESDCTL0, ESDCTL_LOADMODEREG
+	write8	CSD0_BASE | 0x00000033, 0xda
+	write8	CSD0_BASE | 0x01000000, 0xff
+	write32	WEIM_ESDCTL0, ESDCTL_RW
+	write32	CSD0_BASE, 0xDEADBEEF
+	write32	WEIM_ESDMISC, ESDMISC_MDDR_RESET_DL
+
+	mov	pc, lr