S3C6410嵌入式应用平台构建（五）——linux-3.14.4移植到OK6410-(Nand分区问题)

前一篇文章，我们的Linux能后启动了，只是在识别nand时候，没有获取到时钟源，导致后面的分区没哟进行。

我们从启动的log发现：

[06/08-11:25:41:371]s3c24xx-nand s3c6400-nand: failed to get clock

[06/08-11:25:41:371]s3c24xx-nand: probe of s3c6400-nand failed with error –2

于是追踪到代码：

nandflash驱动中——s3c2410.c中

/* get the clock source and enable it */

info->clk = devm_clk_get(&pdev->dev, 'nand');

if (IS_ERR(info->clk)) {

dev_err(&pdev->dev, 'failed to get clockn');

err = -ENOENT;

goto exit_error;

}

发现在去find “nand”clock source时，获取不到，因此，我们打开S3c2410.c (driversmtdnand) 

于是打开Clk-s3c64xx.c (driversclksamsung) 

发现在Aliases时，并没有Aliases nand,因此我试着加了以下代码：ALIAS(MEM0_NFCON, 's3c6400-nand', 'nand'),

/* Aliases for s3c6410-specific clocks. */

static struct samsung_clock_alias s3c6410_clock_aliases[] = {

ALIAS(PCLK_IIC1, 's3c2440-i2c.1', 'i2c'),

ALIAS(PCLK_IIS2, 'samsung-i2s.2', 'iis'),

ALIAS(SCLK_FIMC, 's3c-camif', 'fimc'),

ALIAS(SCLK_AUDIO2, 'samsung-i2s.2', 'audio-bus'),

ALIAS(MEM0_NFCON, 's3c6400-nand', 'nand'),

ALIAS(MEM0_SROM, NULL, 'srom'),

};

这样的话，当去clk_get时，应该不会有问题了。

这个机制是linux-3.10后才加的，这个问题卡了我好久。

我们make uImage后测试如下：

从上面我们又发现出错以下信息：

[06/08-14:18:34:573]nand: No oob scheme defined for oobsize 218

[06/08-14:18:34:573]------------[ cut here ]------------

[06/08-14:18:34:574]kernel BUG at drivers/mtd/nand/nand_base.c:3732!

原来是我们的nandflash的oobsize是218，而nand_base.c中并没有加入218的处理，因此参照6410驱动，修改nand_base.c。做如下添加：

1. 添加nand_oob_218定义

2. 添加case 218处理

好了，我们再次 make uImage后，下载到板子上，启动如下：

[06/08-14:28:27:608]U-Boot 2010.03-svn3 (May 06 2014 - 22:13:20) for SMDK6410

[06/08-14:28:27:608]

[06/08-14:28:27:608]*******************************************************

[06/08-14:28:27:619]                Welcome to Embedded System

[06/08-14:28:27:620]                Base On S3C6410 Devolopment

[06/08-14:28:27:620]                Date:   2014/4/15 22:00 PM

[06/08-14:28:27:630]*******************************************************

[06/08-14:28:27:631]

[06/08-14:28:27:631]CPU:     S3C6410@533MHz

[06/08-14:28:27:631]         Fclk = 533MHz, Hclk = 133MHz, Pclk = 66MHz (ASYNC Mode) 

[06/08-14:28:27:631]Board:   SMDK6410

[06/08-14:28:27:636]DRAM:  256 MB

[06/08-14:28:27:678]Flash:  0 kB

[06/08-14:28:27:679]NAND Flash:  2048 MB

[06/08-14:28:28:799]********************************************************

[06/08-14:28:28:799]Initial LCD controller

[06/08-14:28:28:812]  clk_freq:9 MHz,  div_freq:13 ,rea_freq:9 MHz 

[06/08-14:28:28:812]

[06/08-14:28:28:813] HBP = 2 HFP = 2 HSW = 41,Hpixs:480

[06/08-14:28:28:813] VBP = 2 VFP = 2 VSW = 10,Vpixs:272

[06/08-14:28:28:830]FrameBuff:57e7a000

[06/08-14:28:28:830]  LCD initialization Finished. 

[06/08-14:28:28:831]********************************************************

[06/08-14:28:28:852]In:    serial

[06/08-14:28:28:852]

[06/08-14:28:28:852]Out:   lcd

[06/08-14:28:28:855]

[06/08-14:28:28:855]Err:   lcd

[06/08-14:28:28:856]

[06/08-14:28:29:206]Net:   DM9000

[06/08-14:28:30:225]Hit any key to stop autoboot:  0 

[06/08-14:28:30:225]

[06/08-14:28:30:226]NAND read: 

[06/08-14:28:30:226]device 0 offset 0x100000, size 0x500000

[06/08-14:28:30:226]

[06/08-14:28:33:470] 5242880 bytes read: OK

[06/08-14:28:33:470]

[06/08-14:28:33:470]## Booting kernel from Legacy Image at 50008000 ...

[06/08-14:28:33:470]

[06/08-14:28:33:472]   Image Name:   Linux-3.14.4

[06/08-14:28:33:486]

[06/08-14:28:33:487]   Image Type:   ARM Linux Kernel Image (uncompressed)

[06/08-14:28:33:506]

[06/08-14:28:33:508]   Data Size:    1638624 Bytes =  1.6 MB

[06/08-14:28:33:522]

[06/08-14:28:33:523]   Load Address: 50008000

[06/08-14:28:33:540]

[06/08-14:28:33:540]   Entry Point:  50008040

[06/08-14:28:33:555]

[06/08-14:28:33:885]   Verifying Checksum ... OK

[06/08-14:28:33:901]

[06/08-14:28:33:902]   XIP Kernel Image ... OK

[06/08-14:28:33:915]

[06/08-14:28:33:916]OK

[06/08-14:28:33:933]

[06/08-14:28:33:933]

[06/08-14:28:33:933]Starting kernel ...

[06/08-14:28:33:934]

[06/08-14:28:33:945]

[06/08-14:28:33:959]

[06/08-14:28:33:973]

[06/08-14:28:34:265]Uncompressing Linux... done, booting the kernel.

[06/08-14:28:35:062]Booting Linux on physical CPU 0x0

[06/08-14:28:35:072]Linux version 3.14.4 (simiar@Embedded) (gcc version 4.4.3 (ctng-1.6.1) ) #3 Sun Jun 8 14:27:06 CST 2014

[06/08-14:28:35:076]CPU: ARMv6-compatible processor [410fb766] revision 6 (ARMv7), cr=00c5387d

[06/08-14:28:35:092]CPU: PIPT / VIPT nonaliasing data cache, VIPT nonaliasing instruction cache

[06/08-14:28:35:092]Machine: OK6410

[06/08-14:28:35:093]Ignoring unrecognised tag 0x54410008

[06/08-14:28:35:097]Memory policy: Data cache writeback

[06/08-14:28:35:097]CPU S3C6410 (id 0x36410101)

[06/08-14:28:35:097]CPU: found DTCM0 8k @ 00000000, not enabled

[06/08-14:28:35:098]CPU: moved DTCM0 8k to fffe8000, enabled

[06/08-14:28:35:106]CPU: found DTCM1 8k @ 00000000, not enabled

[06/08-14:28:35:106]CPU: moved DTCM1 8k to fffea000, enabled

[06/08-14:28:35:107]CPU: found ITCM0 8k @ 00000000, not enabled

[06/08-14:28:35:117]CPU: moved ITCM0 8k to fffe0000, enabled

[06/08-14:28:35:118]CPU: found ITCM1 8k @ 00000000, not enabled

[06/08-14:28:35:118]CPU: moved ITCM1 8k to fffe2000, enabled

[06/08-14:28:35:128]Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 65024

[06/08-14:28:35:138]Kernel command line: root=/dev/nfs nfsroot=192.168.1.100:/home/simiar/share/myproject/ok6410/filesystem/ok6410_fs ip=192.168.1.50:192.168.1.100:192.168.1.1:255.255.255.0::eth0:off console=ttySAC0,115200

[06/08-14:28:35:151]PID hash table entries: 1024 (order: 0, 4096 bytes)

[06/08-14:28:35:161]Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)

[06/08-14:28:35:162]Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)

[06/08-14:28:35:171]Memory: 256460K/262144K available (2173K kernel code, 178K rwdata, 664K rodata, 118K init, 198K bss, 5684K reserved)

[06/08-14:28:35:173]Virtual kernel memory layout:

[06/08-14:28:35:184]    vector  : 0xffff0000 - 0xffff1000   (   4 kB)

[06/08-14:28:35:184]    DTCM    : 0xfffe8000 - 0xfffec000   (  16 kB)

[06/08-14:28:35:185]    ITCM    : 0xfffe0000 - 0xfffe4000   (  16 kB)

[06/08-14:28:35:197]    fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)

[06/08-14:28:35:197]    vmalloc : 0xd0800000 - 0xff000000   ( 744 MB)

[06/08-14:28:35:206]    lowmem  : 0xc0000000 - 0xd0000000   ( 256 MB)

[06/08-14:28:35:207]    modules : 0xbf000000 - 0xc0000000   (  16 MB)

[06/08-14:28:35:208]      .text : 0xc0008000 - 0xc02cd674   (2838 kB)

[06/08-14:28:35:217]      .init : 0xc02ce000 - 0xc02eb99c   ( 119 kB)

[06/08-14:28:35:218]      .data : 0xc02ec000 - 0xc0318a00   ( 179 kB)

[06/08-14:28:35:228]       .bss : 0xc0319000 - 0xc034aac8   ( 199 kB)

[06/08-14:28:35:229]SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1

[06/08-14:28:35:229]NR_IRQS:246

[06/08-14:28:35:239]S3C6410 clocks: apll = 533000000, mpll = 533000000

[06/08-14:28:35:240]        epll = 24000000, arm_clk = 533000000

[06/08-14:28:35:240]VIC @f6000000: id 0x00041192, vendor 0x41

[06/08-14:28:35:250]VIC @f6010000: id 0x00041192, vendor 0x41

[06/08-14:28:35:251]sched_clock: 32 bits at 33MHz, resolution 30ns, wraps every 128929599457ns

[06/08-14:28:35:251]Console: colour dummy device 80x30

[06/08-14:28:35:261]Calibrating delay loop... 531.66 BogoMIPS (lpj=2658304)

[06/08-14:28:35:262]pid_max: default: 32768 minimum: 301

[06/08-14:28:35:273]Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)

[06/08-14:28:35:273]Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)

[06/08-14:28:35:274]CPU: Testing write buffer coherency: ok

[06/08-14:28:35:283]Setting up static identity map for 0x50214fa0 - 0x50214ffc

[06/08-14:28:35:295]VFP support v0.3: implementor 41 architecture 1 part 20 variant b rev 5

[06/08-14:28:35:296]DMA: preallocated 256 KiB pool for atomic coherent allocations

[06/08-14:28:35:296]OK6410: Option string ok6410=0

[06/08-14:28:35:308]OK6410: selected LCD display is 480x272

[06/08-14:28:35:308]S3C6410: Initialising architecture

[06/08-14:28:35:309]bio: create slab at 0

[06/08-14:28:35:317]pl08xdmac dma-pl080s.0: initialized 8 virtual memcpy channels

[06/08-14:28:35:318]pl08xdmac dma-pl080s.0: initialized 16 virtual slave channels

[06/08-14:28:35:328]pl08xdmac dma-pl080s.0: DMA: PL080s rev1 at 0x75000000 irq 73

[06/08-14:28:35:329]pl08xdmac dma-pl080s.1: initialized 8 virtual memcpy channels

[06/08-14:28:35:340]pl08xdmac dma-pl080s.1: initialized 12 virtual slave channels

[06/08-14:28:35:340]pl08xdmac dma-pl080s.1: DMA: PL080s rev1 at 0x75100000 irq 74

[06/08-14:28:35:341]usbcore: registered new interface driver usbfs

[06/08-14:28:35:350]usbcore: registered new interface driver hub

[06/08-14:28:35:351]usbcore: registered new device driver usb

[06/08-14:28:35:362]Switched to clocksource samsung_clocksource_timer

[06/08-14:28:35:362]futex hash table entries: 256 (order: 0, 7168 bytes)

[06/08-14:28:35:363]ROMFS MTD (C) 2007 Red Hat, Inc.

[06/08-14:28:35:363]io scheduler noop registered

[06/08-14:28:35:373]io scheduler deadline registered

[06/08-14:28:35:373]io scheduler cfq registered (default)

[06/08-14:28:35:374]s3c-fb s3c-fb: window 0: fb 

[06/08-14:28:35:384]Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled

[06/08-14:28:35:385]s3c6400-uart.0: ttySAC0 at MMIO 0x7f005000 (irq = 69, base_baud = 0) is a S3C6400/10

[06/08-14:28:35:395]console [ttySAC0] enabled

[06/08-14:28:35:395]s3c6400-uart.1: ttySAC1 at MMIO 0x7f005400 (irq = 70, base_baud = 0) is a S3C6400/10

[06/08-14:28:35:406]s3c6400-uart.2: ttySAC2 at MMIO 0x7f005800 (irq = 71, base_baud = 0) is a S3C6400/10