From d08e5ca301b69ab77ecdd34e2b06aee30d6057d1 Mon Sep 17 00:00:00 2001 From: Magnus Lilja Date: Sat, 4 Jul 2009 10:31:24 +0200 Subject: MX31: Add NAND SPL boot support to i.MX31 PDK board. Signed-off-by: Magnus Lilja --- board/freescale/mx31pdk/config.mk | 4 ++ board/freescale/mx31pdk/lowlevel_init.S | 93 +++++++++++++++++++++++++++++++++ 2 files changed, 97 insertions(+) create mode 100644 board/freescale/mx31pdk/lowlevel_init.S (limited to 'board/freescale') diff --git a/board/freescale/mx31pdk/config.mk b/board/freescale/mx31pdk/config.mk index d34dc02d96a..dcaa09ff837 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 00000000000..cd0503ec3a5 --- /dev/null +++ b/board/freescale/mx31pdk/lowlevel_init.S @@ -0,0 +1,93 @@ +/* + * (C) Copyright 2009 Magnus Lilja + * + * 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 +#include +#include + +.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 -- cgit v1.2.3