Document parameters used for specifying the NAND image to be loaded. Also fix the definition of CONFIG_SPL_NAND_SIMPLE -- it's only nand_spl_simple.c, not the entire nand directory. The word "simple" is there for a reason. :-) Signed-off-by: Scott Wood <scottwood@freescale.com> --- v2: updated for makefile changes earlier in patchsetmaster
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/*
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* NAND boot for Freescale Enhanced Local Bus Controller, Flash Control Machine |
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* |
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* (C) Copyright 2006-2008 |
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* Stefan Roese, DENX Software Engineering, sr@denx.de. |
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* |
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* Copyright (c) 2008 Freescale Semiconductor, Inc. |
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* Author: Scott Wood <scottwood@freescale.com> |
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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 <asm/io.h> |
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#include <asm/fsl_lbc.h> |
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#include <nand.h> |
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#define WINDOW_SIZE 8192 |
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static void nand_wait(void) |
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{ |
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fsl_lbc_t *regs = LBC_BASE_ADDR; |
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for (;;) { |
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uint32_t status = in_be32(®s->ltesr); |
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if (status == 1) |
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return; |
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if (status & 1) { |
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puts("read failed (ltesr)\n"); |
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for (;;); |
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} |
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} |
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} |
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static int nand_load_image(uint32_t offs, unsigned int uboot_size, void *vdst) |
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{ |
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fsl_lbc_t *regs = LBC_BASE_ADDR; |
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uchar *buf = (uchar *)CONFIG_SYS_NAND_BASE; |
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const int large = CONFIG_SYS_NAND_OR_PRELIM & OR_FCM_PGS; |
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const int block_shift = large ? 17 : 14; |
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const int block_size = 1 << block_shift; |
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const int page_size = large ? 2048 : 512; |
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const int bad_marker = large ? page_size + 0 : page_size + 5; |
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int fmr = (15 << FMR_CWTO_SHIFT) | (2 << FMR_AL_SHIFT) | 2; |
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int pos = 0; |
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char *dst = vdst; |
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if (offs & (block_size - 1)) { |
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puts("bad offset\n"); |
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for (;;); |
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} |
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if (large) { |
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fmr |= FMR_ECCM; |
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out_be32(®s->fcr, (NAND_CMD_READ0 << FCR_CMD0_SHIFT) | |
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(NAND_CMD_READSTART << FCR_CMD1_SHIFT)); |
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out_be32(®s->fir, |
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(FIR_OP_CW0 << FIR_OP0_SHIFT) | |
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(FIR_OP_CA << FIR_OP1_SHIFT) | |
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(FIR_OP_PA << FIR_OP2_SHIFT) | |
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(FIR_OP_CW1 << FIR_OP3_SHIFT) | |
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(FIR_OP_RBW << FIR_OP4_SHIFT)); |
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} else { |
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out_be32(®s->fcr, NAND_CMD_READ0 << FCR_CMD0_SHIFT); |
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out_be32(®s->fir, |
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(FIR_OP_CW0 << FIR_OP0_SHIFT) | |
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(FIR_OP_CA << FIR_OP1_SHIFT) | |
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(FIR_OP_PA << FIR_OP2_SHIFT) | |
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(FIR_OP_RBW << FIR_OP3_SHIFT)); |
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} |
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out_be32(®s->fbcr, 0); |
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clrsetbits_be32(®s->bank[0].br, BR_DECC, BR_DECC_CHK_GEN); |
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while (pos < uboot_size) { |
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int i = 0; |
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out_be32(®s->fbar, offs >> block_shift); |
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do { |
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int j; |
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unsigned int page_offs = (offs & (block_size - 1)) << 1; |
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out_be32(®s->ltesr, ~0); |
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out_be32(®s->lteatr, 0); |
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out_be32(®s->fpar, page_offs); |
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out_be32(®s->fmr, fmr); |
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out_be32(®s->lsor, 0); |
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nand_wait(); |
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page_offs %= WINDOW_SIZE; |
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/*
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* If either of the first two pages are marked bad, |
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* continue to the next block. |
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*/ |
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if (i++ < 2 && buf[page_offs + bad_marker] != 0xff) { |
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puts("skipping\n"); |
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offs = (offs + block_size) & ~(block_size - 1); |
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pos &= ~(block_size - 1); |
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break; |
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} |
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for (j = 0; j < page_size; j++) |
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dst[pos + j] = buf[page_offs + j]; |
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pos += page_size; |
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offs += page_size; |
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} while ((offs & (block_size - 1)) && (pos < uboot_size)); |
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} |
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return 0; |
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} |
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/*
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* The main entry for NAND booting. It's necessary that SDRAM is already |
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* configured and available since this code loads the main U-Boot image |
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* from NAND into SDRAM and starts it from there. |
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*/ |
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void nand_boot(void) |
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{ |
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__attribute__((noreturn)) void (*uboot)(void); |
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/*
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* Load U-Boot image from NAND into RAM |
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*/ |
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nand_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS, |
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CONFIG_SYS_NAND_U_BOOT_SIZE, |
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(void *)CONFIG_SYS_NAND_U_BOOT_DST); |
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#ifdef CONFIG_NAND_ENV_DST |
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nand_load_image(CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, |
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(void *)CONFIG_NAND_ENV_DST); |
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#ifdef CONFIG_ENV_OFFSET_REDUND |
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nand_load_image(CONFIG_ENV_OFFSET_REDUND, CONFIG_ENV_SIZE, |
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(void *)CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE); |
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#endif |
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#endif |
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#ifdef CONFIG_SPL_FLUSH_IMAGE |
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/*
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* Clean d-cache and invalidate i-cache, to |
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* make sure that no stale data is executed. |
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*/ |
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flush_cache(CONFIG_SYS_NAND_U_BOOT_DST, CONFIG_SYS_NAND_U_BOOT_SIZE); |
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#endif |
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puts("transfering control\n"); |
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/*
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* Jump to U-Boot image |
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*/ |
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uboot = (void *)CONFIG_SYS_NAND_U_BOOT_START; |
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(*uboot)(); |
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} |
Loading…
Reference in new issue