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本帖最后由 carsion 于 2013-12-02 12:15 编辑
环境：RHEL6.3
编译环境：arm-linux-gcc-4.3.3
开发板：TQ2440
Nandflash型号：K9F2G08U0B
#####################################################################################################
移植过程是这样的：
我在移植u-boot.2009.08到TQ2440的时候，出现了一个很奇怪的问题，就是在移植nand flash 的时候，不能从nand flash启动。请看我nand flash部分的具体移植过程：
#####################################################################################################
支持nandflash：
修改drivers/mtd/nand/s3c2410_nand.c。修改如下：
##################################################
#include <common.h>
#if 0
#define DEBUGN printf
#else
#define DEBUGN(x, args ...) {}
#endif
#include <nand.h>
#include <s3c2410.h>
#include <asm/io.h>
#define __REGb(x) (*(volatile unsigned char *)(x))
#define __REGi(x) (*(volatile unsigned int *)(x))
#define NF_BASE 0x4e000000
# if defined(CONFIG_S3C2440)&& ! defined(CONFIG_S3C2410)
#define NFCONF __REGi(NF_BASE + 0x0)
#define NFCONT __REGi(NF_BASE + 0x4)
#define NFCMD __REGb(NF_BASE + 0x8)
#define NFADDR __REGb(NF_BASE + 0xc)
#define NFDATA __REGb(NF_BASE + 0x10)
#define NFMECCD0 __REGb(NF_BASE + 0x14)
#define NFMECCD1 __REGb(NF_BASE + 0x18)
#define NFSECCD __REGb(NF_BASE + 0x1c)
#define NFSTAT __REGb(NF_BASE + 0x20)
#define NFESTAT0 __REGb(NF_BASE + 0x24)
#define NFESTAT1 __REGb(NF_BASE + 0x28)
#define NFMECC0 __REGb(NF_BASE + 0x2c)
#define NFMECC1 __REGb(NF_BASE + 0x30)
#define NFSECC __REGb(NF_BASE + 0x34)
#define NFSBLK __REGb(NF_BASE + 0x38)
#define NFEBLK __REGb(NF_BASE + 0x3c)
#define NFECC0 __REGb(NF_BASE + 0x2c)
#define NFECC1 __REGb(NF_BASE + 0x2d)
#define NFECC2 __REGb(NF_BASE + 0x2e)
#define S3C2410_NFCONT_EN (1<<0)
#define S3C2410_NFCONT_INITECC (1<<4)
#define S3C2410_NFCONT_nFCE (1<<1)
#define S3C2410_NFCONT_MAINECCLOCK (1<<5)
#define S3C2410_NFCONF_TACLS(x) ((x)<<12)
#define S3C2410_NFCONF_TWRPH0(x) ((x)<<8)
#define S3C2410_NFCONF_TWRPH1(x) ((x)<<4)
#define S3C2410_ADDR_NALE 0x08
#define S3C2410_ADDR_NCLE 0x0c
#endif
# if defined (CONFIG_S3C2410)
#define NFCONF __REGi(NF_BASE + 0x0)
#define NFCMD __REGb(NF_BASE + 0x4)
#define NFADDR __REGb(NF_BASE + 0x8)
#define NFDATA __REGb(NF_BASE + 0xc)
#define NFSTAT __REGb(NF_BASE + 0x10)
#define NFECC0 __REGb(NF_BASE + 0x14)
#define NFECC1 __REGb(NF_BASE + 0x15)
#define NFECC2 __REGb(NF_BASE + 0x16)
#define S3C2410_NFCONF_EN (1<<15)
#define S3C2410_NFCONF_512BYTE (1<<14)
#define S3C2410_NFCONF_4STEP (1<<13)
#define S3C2410_NFCONF_INITECC (1<<12)
#define S3C2410_NFCONF_nFCE (1<<11)
#define S3C2410_NFCONF_TACLS(x) ((x)<<8)
#define S3C2410_NFCONF_TWRPH0(x) ((x)<<4)
#define S3C2410_NFCONF_TWRPH1(x) ((x)<<0)
#define S3C2410_ADDR_NALE 4
#define S3C2410_ADDR_NCLE 8
#endif
ulong IO_ADDR_W = NF_BASE;
static void s3c2410_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
{
// struct nand_chip *chip = mtd->priv;
DEBUGN("hwcontrol(): 0x%02x 0x%02x\n", cmd, ctrl);
if (ctrl & NAND_CTRL_CHANGE) {
if (!(ctrl & NAND_CLE))
IO_ADDR_W |= S3C2410_ADDR_NCLE;
if (!(ctrl & NAND_ALE))
IO_ADDR_W |= S3C2410_ADDR_NALE;
// chip->IO_ADDR_W = (void *)IO_ADDR_W;
# if defined(CONFIG_S3C2410)
if (ctrl & NAND_NCE)
NFCONF &= ~S3C2410_NFCONF_nFCE;
else
NFCONF |= S3C2410_NFCONF_nFCE;
# endif
# if defined(CONFIG_S3C2440) && ! defined(CONFIG_S3C2410)
if (ctrl & NAND_NCE)
NFCONT &= ~S3C2410_NFCONT_nFCE;
else
NFCONT |= S3C2410_NFCONT_nFCE
#endif
}
if (cmd != NAND_CMD_NONE)
// writeb(cmd, chip->IO_ADDR_W);
writeb(cmd, (void *)IO_ADDR_W);
}
static int s3c2410_dev_ready(struct mtd_info *mtd)
{
DEBUGN("dev_ready\n");
return (NFSTAT & 0x01);
}
#ifdef CONFIG_S3C2410_NAND_HWECC
void s3c2410_nand_enable_hwecc(struct mtd_info *mtd, int mode)
{
DEBUGN("s3c2410_nand_enable_hwecc(%p, %d)\n", mtd, mode);
# if defined(CONFIG_S3C2410)
NFCONF |= S3C2410_NFCONF_INITECC;
#endif
# if defined(CONFIG_S3C2440)&& ! defined(CONFIG_S3C2410)
NFCONT |= S3C2410_NFCONT_INITECC;
#endif
}
static int s3c2410_nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat,
u_char *ecc_code)
{
ecc_code[0] = NFECC0;
ecc_code[1] = NFECC1;
ecc_code[2] = NFECC2;
DEBUGN("s3c2410_nand_calculate_hwecc(%p,): 0x%02x 0x%02x 0x%02x\n",
mtd , ecc_code[0], ecc_code[1], ecc_code[2]);
return 0;
}
static int s3c2410_nand_correct_data(struct mtd_info *mtd, u_char *dat,
u_char *read_ecc, u_char *calc_ecc)
{
if (read_ecc[0] == calc_ecc[0] &&
read_ecc[1] == calc_ecc[1] &&
read_ecc[2] == calc_ecc[2])
return 0;
printf("s3c2410_nand_correct_data: not implemented\n");
return -1;
}
#endif
int board_nand_init(struct nand_chip *nand)
{
u_int32_t cfg;
u_int8_t tacls, twrph0, twrph1;
S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();
DEBUGN("board_nand_init()\n");
clk_power->CLKCON |= (1 << 4);
/* initialize hardware */
# if defined(CONFIG_S3C2410)
twrph0 = 3; twrph1 = 0; tacls = 0;
cfg = S3C2410_NFCONF_EN;
cfg |= S3C2410_NFCONF_TACLS(tacls - 1);
cfg |= S3C2410_NFCONF_TWRPH0(twrph0 - 1);
cfg |= S3C2410_NFCONF_TWRPH1(twrph1 - 1);
NFCONF = cfg;
/* initialize nand_chip data structure */
nand->IO_ADDR_R = nand->IO_ADDR_W = (void *)0x4e00000c;
#endif
# if defined(CONFIG_S3C2440)&& ! defined(CONFIG_S3C2410)
twrph0 = 4; twrph1 = 2; tacls = 0;
cfg = 0;
cfg |= S3C2410_NFCONF_TACLS(tacls - 1);
cfg |= S3C2410_NFCONF_TWRPH0(twrph0 - 1);
cfg |= S3C2410_NFCONF_TWRPH1(twrph1 - 1);
NFCONF = cfg;
NFCONT = (0<<13)|(0<<12)|(0<<10)|(0<<9)|(0<<8)|(0<<6)|(0<<5)|(1<<4)|(0<<1)|(1<<0);
/* initialize nand_chip data structure */
nand->IO_ADDR_R = nand->IO_ADDR_W = (void *)0x4e000010;
#endif
/* read_buf and write_buf are default */
/* read_byte and write_byte are default */
/* hwcontrol always must be implemented */
nand->cmd_ctrl = s3c2410_hwcontrol;
nand->dev_ready = s3c2410_dev_ready;
#ifdef CONFIG_S3C2410_NAND_HWECC
nand->ecc.hwctl = s3c2410_nand_enable_hwecc;
nand->ecc.calculate = s3c2410_nand_calculate_ecc;
nand->ecc.correct = s3c2410_nand_correct_data;
nand->ecc.mode = NAND_ECC_HW3_512;
#else
nand->ecc.mode = NAND_ECC_SOFT;
#endif
#ifdef CONFIG_S3C2410_NAND_BBT
nand->options = NAND_USE_FLASH_BBT;
#else
nand->options = 0;
#endif
DEBUGN("end of nand_init\n");
return 0;
}
#############################################################
修改配置文件include/configs/smdk2440.h，增加支持nand的相关宏：
#############################################################
#define CONFIG_NAND_S3C2410 1
/* Comman line configuration. */
#define CONFIG_CMD_NAND
/* NAND flash settings */
#if defined(CONFIG_CMD_NAND)
#define CONFIG_SYS_NAND_BASE 0X4E000000
#define CONFIG_SYS_MAX_NAND_DEVICE 1
#define CONFIG_MTD_NAND_VERIFY_WRITE 1
#endif
########################################################
在dirvers/mtd/nand目录下makefile中，添加以下内容：
########################################################
COBJS-y +=s3c2410_nand.o
########################################################
将生成的u-boot.bin下载到Nor flash 中，可以看到如下信息：
#######################################################
U-Boot 2009.08 (12鏈02 2013 - 10:54:15)
DRAM: 64 MB
Flash: 2 MB
NAND: 256 MiB
*** Warning - bad CRC or NAND, using default environment
In: serial
Out: serial
Err: serial
Net: dm9000
SMDK2440 #
#################################################
这里是正常的，能检测到了nand flash的信息。下面是支持从nandflash中启动的配置：
#################################################
在include/configs/smdk2440.h中添加代码如下：
#################################################
/* Nand flash reister and envionment variables */
#define CONFIG_S3C2440_NAND_BOOT 1
#define NAND_CTL_BASE 0X4E000000
#define bINT_CTL(Nb) __REG(INT_CTL_BASE+(Nb))
#define UBOOT_RAM_BASE 0x33f80000
#define STACK_BASE 0x33F00000
#define STACK_SIZE 0x80000
################################################
修改cpu/arm920t/start.S如下：
################################################
屏蔽掉从Nor flash启动部分
################################################
#if 0
#ifndef CONFIG_SKIP_RELOCATE_UBOOT
relocate: /* relocate U-Boot to RAM */
adr r0, _start /* r0 <- current position of code */
ldr r1, _TEXT_BASE /* test if we run from flash or RAM */
cmp r0, r1 /* don't reloc during debug */
beq stack_setup
ldr r2, _armboot_start
ldr r3, _bss_start
sub r2, r3, r2 /* r2 <- size of armboot */
add r2, r0, r2 /* r2 <- source end address */
copy_loop:
ldmia r0!, {r3-r10} /* copy from source address [r0] */
stmia r1!, {r3-r10} /* copy to target address [r1] */
cmp r0, r2 /* until source end addreee [r2] */
ble copy_loop
#endif /* CONFIG_SKIP_RELOCATE_UBOOT */
#endif
################################################
添加从nand flash 启动代码
################################################
#ifdef CONFIG_S3C2440_NAND_BOOT
#define oNFCONF 0x00
#define oNFCONT 0x04
#define oNFCMD 0x08
#define oNFSTAT 0x20
#define LENGTH_UBOOT 0x60000
mov r1, # NAND_CTL_BASE
ldr r2, = ((7<<12)|(7<<8)|(7<<4)|(0<<0))
str r2, [r1, #oNFCONF]
ldr r2, [r1, #oNFCONF]
ldr r2, = ((1<<4)|(0<<1)|(1<<0))
str r2, [r1, #oNFCONT]
ldr r2, [r1, #oNFCONT]
ldr r2, =(0x6)
str r2, [r1, #oNFSTAT]
ldr r2, [r1, #oNFSTAT]
mov r2, #0xff
strb r2, [r1, #oNFCMD]
mov r3, #0
nand1:
add r3, r3, #0x01
cmp r3, #0xa
blt nand1
nand2:
ldr r2, [r1, #oNFSTAT]
tst r2, #0x2
beq nand2
ldr r2, [r1, #oNFCONT]
orr r2, r2, #0x2
str r2, [r1, #oNFCONT]
/* get read to call C functions(for nand_read) */
ldr sp, DW_STACK_START
mov fp, #0
/* copy U-BOOT to RAM */
ldr r0, =TEXT_BASE
mov r1, #0x0
mov r2, # LENGTH_UBOOT
bl nand_read_ll
tst r0, #0x0
beq ok_nand_read
bad_nand_read:
loop2: b loop2
ok_nand_read:
mov r0, #0
ldr r1, =TEXT_BASE
mov r2, #0x400
go_next:
ldr r3, [r0], #4
ldr r4, [r1], #4
teq r3, r4
bne notmatch
subs r2, r2, #4
beq stack_setup
bne go_next
notmatch:
loop3: b loop3
#endif /* CONFIG_S3C2440_NAND_BOOT */
#####################################################
添加DW_STACK_START的定义：
#####################################################
.align 2
DW_STACK_START: .word STACK_BASE + STACK_SIZE - 4
#####################################################
在board/samsung/smdk2440下新建一个nand_read.c文件，代码如下：
#####################################################
#include <common.h>
#include <linux/mtd/nand.h>
#define __REGb(x) (*(volatile unsigned char *)(x))
#define __REGw(x) (*(volatile unsigned short *)(x))
#define __REGi(x) (*(volatile unsigned int *)(x))
#define NF_BASE 0x4E000000
# if defined(CONFIG_S3C2410) && !defined(CONFIG_S3C2440)
#define NFCONF __REGi(NF_BASE + 0x0)
#define NFCMD __REGb(NF_BASE + 0x4)
#define NFADDR __REGb(NF_BASE + 0x8)
#define NFDATA __REGb(NF_BASE + 0xc)
#define NFSTAT __REGb(NF_BASE + 0x10)
#define NFSTAT_BUSY 1
#define nand_select() (NFCONF & =~(0x800))
#define nand_deselect() (NFCONF | = (0x800))
#define nand_clear_RnB() do {} while(0)
#elif defined(CONFIG_S3C2440)||defined(CONFIG_S3C2442)
#define NFCONF __REGi(NF_BASE + 0x0)
#define NFCONT __REGi(NF_BASE + 0x4)
#define NFCMD __REGb(NF_BASE + 0x8)
#define NFADDR __REGb(NF_BASE + 0xc)
#define NFDATA __REGb(NF_BASE + 0x10)
#define NFDATA16 __REGw(NF_BASE + 0x10)
#define NFSTAT __REGb(NF_BASE + 0x20)
#define NFSTAT_BUSY 1
#define nand_select() (NFCONT &=~(1<<1))
#define nand_deselect() (NFCONT |= (1<<1))
#define nand_clear_RnB() (NFSTAT |= (1<<2))
#endif
static inline void nand_wait(void)
{
int i;
while (! (NFSTAT & NFSTAT_BUSY))
for (i=0; i<10; i++);
}
struct boot_nand_t
{
int page_size;
int block_size;
int bad_block_offset;
//unsigned long size;
};
static int is_bad_block(struct boot_nand_t * nand,unsigned long i)
{
unsigned char data;
unsigned long page_num;
nand_clear_RnB();
if (nand->page_size==512){
NFCMD = NAND_CMD_READOOB;
NFADDR = nand->bad_block_offset & 0xf;
NFADDR = (i>>9) & 0xff;
NFADDR = (i>>17) & 0xff;
NFADDR = (i>>25) & 0xff;
}else if (nand->page_size ==2048){
page_num= i>>11;
NFCMD = NAND_CMD_READ0;
NFADDR = (nand->bad_block_offset>>8) & 0xff;
NFADDR = page_num & 0xff;
NFADDR = (page_num>>8) & 0xff;
NFADDR = (page_num>>16) & 0xff;
}else{
return -1;
}
nand_wait();
data = (NFDATA & 0xff);
if(data != 0xff)
return 1;
return 0;
}
static int nand_read_page_ll(struct boot_nand_t * nand,unsigned char * buf, unsigned long addr)
{
unsigned short *ptr16 = (unsigned short *)buf;
unsigned int i,page_num;
nand_clear_RnB();
NFCMD = NAND_CMD_READ0;
if (nand->page_size == 512){
NFADDR = addr & 0xff;
NFADDR = (addr >> 9) & 0xff;
NFADDR = (addr >> 17) & 0xff;
NFADDR = (addr >> 25) & 0xff;
}else if(nand->page_size == 2048){
page_num = addr >> 11;
NFADDR = 0;
NFADDR = 0;
NFADDR = page_num & 0xff;
NFADDR = (addr >> 8) & 0xff;
NFADDR = (addr >> 16) & 0xff;
NFCMD = NAND_CMD_READSTART;
}else{
return -1;
}
nand_wait();
# if defined(CONFIG_S3C2410)&& !defined(CONFIG_S3C2440)
for (i=0 ;i<nand->page_size;i++)
*buf = (NFDATA & 0xff);
buf++;
# elif defined(CONFIG_S3C2440)|| defined(CONFIG_S3C2442)
for (i=0; i< nand->page_size; i++){
*ptr16 = NFDATA16;
ptr16++;
}
#endif
return nand->page_size;
;
}
static unsigned short nand_read_id()
{
unsigned short res = 0;
NFCMD = NAND_CMD_READID;
NFADDR = 0;
res = NFDATA;
res = (res <<8) | NFDATA;
return res;
}
int nand_read_ll(unsigned char *buf,unsigned long start_addr,int size)
{
int i,j;
unsigned short nand_id;
struct boot_nand_t nand;
nand_select();
nand_clear_RnB();
for (i = 0; i < 10; i++)
;
nand_id = nand_read_id();
if(0){
unsigned short *nid = (unsigned short *)0x31fffff0;
*nid = nand_id;
}
if ((nand_id == 0xec76) || (nand_id==0xad76)){
nand.page_size = 512;
nand.block_size =6 * 1024;
nand.bad_block_offset =5;
}else if(nand_id == 0xecf1 ||
nand_id == 0xecda ||
nand_id == 0xecd3){
nand.page_size == 2048;
nand.block_size == 128 * 1024;
nand.bad_block_offset == nand.page_size;
}else{
return -1;
}
if ((start_addr &(nand.block_size -1)) || (size & (nand.block_size -1)))
return -1;
for(i = start_addr; i < (start_addr + size);){
#ifdef CONFIG_S3C2410_NAND_SKIP_BAD
if(i & (nand.block_size - 1)==0){
if(is_bad_block(&nand,i)||is_bad_block(&nand, i + nand.page_size)){
i += nand.block_size;
size += nand.block_size;
continue;
}
}
#endif
j = nand_read_page_ll(&nand,buf,i);
i += j;
buf += j;
}
nand_deselect();
return 0 ;
}
###################################################
修改在board/samsung/smdk2440目录下的Makefile：
###################################################
COBJS := smdk2440.o flash.o nand_read.o
###################################################
修改cpu/arm920t/u-boot.lds文件，修改如下：
###################################################
.text :
{
cpu/arm920t/start.o (.text)
board/samsung/smdk2440/lowlevel_init.o (.text)
board/samsung/smdk2440/nand_read.o (.text)
*(.text)
}
###################################################
将include/configs/smdk2440.h中的Nor flash环境变量屏蔽并且添加新代码如下：
###################################################
/* Command line configuration */
#define CONFIG_CMD_NAND
#if defined(CONFIG_CMD_NAND)
#define CONFIG_ENV_IS_IN_NAND 1
#define CONFIG_ENV_OFFSET 0x60000
#define CONFIG_ENV_SIZE 0x20000
#else
#define CONFIG_ENV_IS_IN_FLASH 1
#define CONFIG_ENV_SIZE 0x10000 /* Total Size of Environment Sector */
#endif
###################################################
然后编译，将生成的u-boot.bin下载到nand flash中。问题是，从nand flash中启动却终端没有任何消息出现。这个是怎么回事的啊？ |
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发表于 2013-12-02 12:16