基於Tiny6410的Linux3.2.8系統移植（二）BSP編寫及驅動移植

二、Linux3.2.8核心部分

實驗5：BSP編寫第一步
本次實驗主要是添加JASON6410板的BSP，另外添加了NAND flash驅動，MTD及UBIFS的核心支援。以下是mach-jason6410.c的源碼：

/* linux/arch/arm/mach-s3c64xx/mach-jason6410.c * * Copyright 2012 Jason Lu <gfvvz@yahoo.com.cn> *     http://jason2012.blog.chinaunix.net * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. **/#include <linux/init.h>#include <linux/interrupt.h>#include <linux/fb.h>#include <linux/gpio.h>#include <linux/kernel.h>#include <linux/list.h>#include <linux/dm9000.h>#include <linux/mtd/mtd.h>#include <linux/mtd/partitions.h>#include <linux/serial_core.h>#include <linux/types.h>#include <asm/mach-types.h>#include <asm/mach/arch.h>#include <asm/mach/map.h>#include <mach/map.h>#include <mach/regs-gpio.h>#include <mach/regs-modem.h>#include <mach/regs-srom.h>#include <plat/s3c6410.h>#include <plat/adc.h>#include <plat/cpu.h>#include <plat/devs.h>#include <plat/fb.h>#include <plat/nand.h>#include <plat/regs-serial.h>#include <plat/ts.h>#include <plat/regs-fb-v4.h>#include <video/platform_lcd.h>#define UCON S3C2410_UCON_DEFAULT#define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)#define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)static struct s3c2410_uartcfg jason6410_uartcfgs[] __initdata = {    [0] = {        .hwport    = 0,        .flags    = 0,        .ucon    = UCON,        .ulcon    = ULCON,        .ufcon    = UFCON,    },    [1] = {        .hwport    = 1,        .flags    = 0,        .ucon    = UCON,        .ulcon    = ULCON,        .ufcon    = UFCON,    },    [2] = {        .hwport    = 2,        .flags    = 0,        .ucon    = UCON,        .ulcon    = ULCON,        .ufcon    = UFCON,    },    [3] = {        .hwport    = 3,        .flags    = 0,        .ucon    = UCON,        .ulcon    = ULCON,        .ufcon    = UFCON,    },};/* Nand flash */static struct mtd_partition jason6410_nand_part[] = {    {        .name        = "u-boot-2011.06",        .offset        = 0,        .size        = (4 * 128 *SZ_1K),        .mask_flags    = MTD_CAP_NANDFLASH,    },    {        .name        = "Linux Kernel 3.2.8",        .offset        = MTDPART_OFS_APPEND,        .size        = (5*SZ_1M) ,        .mask_flags    = MTD_CAP_NANDFLASH,    },    {        .name        = "UBI File System",        .offset        = MTDPART_OFS_APPEND,        .size        = MTDPART_SIZ_FULL,    }};static struct s3c2410_nand_set jason6410_nand_sets[] = {    [0] = {        .name        = "nand",        .nr_chips    = 1,        .nr_partitions    = ARRAY_SIZE(jason6410_nand_part),        .partitions    = jason6410_nand_part,    },};static struct s3c2410_platform_nand jason6410_nand_info = {    .tacls        = 25,    .twrph0        = 55,    .twrph1        = 40,    .nr_sets    = ARRAY_SIZE(jason6410_nand_sets),    .sets        = jason6410_nand_sets,};static struct platform_device *jason6410_devices[] __initdata = {    &s3c_device_nand,};static void __init jason6410_map_io(void){    s3c64xx_init_io(NULL, 0);    s3c24xx_init_clocks(12000000);    s3c24xx_init_uarts(jason6410_uartcfgs, ARRAY_SIZE(jason6410_uartcfgs));}static void __init jason6410_machine_init(void){    s3c_device_nand.name = "s3c6410-nand";    s3c_nand_set_platdata(&jason6410_nand_info);    platform_add_devices(jason6410_devices, ARRAY_SIZE(jason6410_devices));}MACHINE_START(JASON6410, "JASON6410")    /* Maintainer: Darius Augulis <augulis.darius@gmail.com> */    .atag_offset    = 0x100,    .init_irq    = s3c6410_init_irq,    .map_io        = jason6410_map_io,    .init_machine    = jason6410_machine_init,    .timer        = &s3c24xx_timer,MACHINE_END

添加BSP支援的過程如下：

1. arch/arm/mach-s3c6410/Kconfigline 93, add:config MACH_JASON6410    bool "JASON6410"    select CPU_S3C6410    select S3C_DEV_FB    select S3C64XX_SETUP_FB_24BPP    help     Machine support for the JASOM64102. arch/arm/mach-s3c6410/Makefileline 47, add:obj-$(CONFIG_MACH_JASON6410)    += mach-jason6410.o3. 添加mach-jason6410.c到目錄：arch/arm/mach-s3c6410/

另外，作為自己移植的板子，把MACHINE ID也給改了（當然，在u-boot裡的也應做相應修改）。

@arch/arm/tools/mach-typeslast line, add:jason6410 MACH_JASON6410 JASON6410 8888

這裡唯寫出本次主要修改，其餘修改過程詳見《基於Tiny6410的Linux3.2.8系統移植（一）》到此，就能正常掛載檔案系統了。接下來要做的就是 完善BSP並移植驅動程式。