2010-06-16 12:28:27 +00:00
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/*
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*
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* (c) 2007 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <init.h>
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#include <mach/imx-regs.h>
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#include <mach/imx-pll.h>
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#include <mach/esdctl.h>
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#include <asm/cache-l2x0.h>
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2011-09-22 17:02:57 +00:00
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#include <io.h>
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2010-06-16 12:28:27 +00:00
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#include <mach/imx-nand.h>
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#include <asm/barebox-arm.h>
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#include <asm/system.h>
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2012-03-09 11:58:21 +00:00
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#include <asm-generic/sections.h>
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2010-06-16 12:28:27 +00:00
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#include <asm-generic/memory_layout.h>
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2010-09-20 07:33:42 +00:00
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#ifdef CONFIG_NAND_IMX_BOOT
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2010-06-16 12:28:27 +00:00
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static void __bare_init __naked insdram(void)
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{
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uint32_t r;
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PCCR1 |= PCCR1_NFC_BAUDEN;
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/* setup a stack to be able to call imx_nand_load_image() */
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r = STACK_BASE + STACK_SIZE - 12;
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__asm__ __volatile__("mov sp, %0" : : "r"(r));
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2012-03-09 11:58:21 +00:00
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imx_nand_load_image((void *)TEXT_BASE, barebox_image_size);
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2010-06-16 12:28:27 +00:00
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board_init_lowlevel_return();
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}
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2010-09-20 07:33:42 +00:00
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#endif
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2010-06-16 12:28:27 +00:00
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#define ESDCTL0_VAL (ESDCTL0_SDE | ESDCTL0_ROW13 | ESDCTL0_COL10)
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void __bare_init __naked board_init_lowlevel(void)
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{
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uint32_t r;
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int i;
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2010-09-20 07:33:42 +00:00
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#ifdef CONFIG_NAND_IMX_BOOT
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2010-06-16 12:28:27 +00:00
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unsigned int *trg, *src;
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2010-09-20 07:33:42 +00:00
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#endif
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2010-06-16 12:28:27 +00:00
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/* ahb lite ip interface */
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AIPI1_PSR0 = 0x20040304;
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AIPI1_PSR1 = 0xDFFBFCFB;
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AIPI2_PSR0 = 0x00000000;
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AIPI2_PSR1 = 0xFFFFFFFF;
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/* Skip SDRAM initialization if we run from RAM */
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r = get_pc();
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if (r > 0xa0000000 && r < 0xb0000000)
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board_init_lowlevel_return();
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/*
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* DDR on CSD0
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*/
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writel(0x00000008, ESDMISC); /* Enable DDR SDRAM operation */
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DSCR(3) = 0x55555555; /* Set the driving strength */
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DSCR(5) = 0x55555555;
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DSCR(6) = 0x55555555;
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DSCR(7) = 0x00005005;
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DSCR(8) = 0x15555555;
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writel(0x00000004, ESDMISC); /* Initial reset */
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writel(0x006ac73a, ESDCFG0);
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writel(ESDCTL0_VAL | ESDCTL0_SMODE_PRECHARGE, ESDCTL0); /* precharge CSD0 all banks */
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writel(0x00000000, 0xA0000F00); /* CSD0 precharge address (A10 = 1) */
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writel(ESDCTL0_VAL | ESDCTL0_SMODE_AUTO_REFRESH, ESDCTL0);
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for (i = 0; i < 8; i++)
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writel(0, 0xa0000f00);
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writel(ESDCTL0_VAL | ESDCTL0_SMODE_LOAD_MODE, ESDCTL0);
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writeb(0xda, 0xa0000033);
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writeb(0xff, 0xa1000000);
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writel(ESDCTL0_VAL | ESDCTL0_DSIZ_31_0 | ESDCTL0_REF4 |
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ESDCTL0_BL | ESDCTL0_SMODE_NORMAL, ESDCTL0);
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#ifdef CONFIG_NAND_IMX_BOOT
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/* skip NAND boot if not running from NFC space */
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r = get_pc();
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if (r < IMX_NFC_BASE || r > IMX_NFC_BASE + 0x800)
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board_init_lowlevel_return();
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src = (unsigned int *)IMX_NFC_BASE;
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trg = (unsigned int *)TEXT_BASE;
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/* Move ourselves out of NFC SRAM */
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for (i = 0; i < 0x800 / sizeof(int); i++)
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*trg++ = *src++;
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/* Jump to SDRAM */
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r = (unsigned int)&insdram;
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__asm__ __volatile__("mov pc, %0" : : "r"(r));
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#else
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board_init_lowlevel_return();
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#endif
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}
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