Frost's Blog: u-boot & kernel bring up工作紀錄

一、U-Boot

u-boot主要帶起cpu, flash, ram, lan(tftp), 每個案子需求不同

1. 新增
(1) 在include中新增
product_info.h => 定義用來記錄product_info的structure

(2) 在include/configs中新增
dsr250n_common.h => 定義dsr250n的資訊, 如ram, memory等...(利用公板的版本修改)

2. lib_arm/board.c
(1) include product_info.h, 並把product_info儲存在ram中.

(2) 利用eth_init() 去 init ethernet (board\cavium\cns3000\cns3xxx_gsw.c)

3. common/main.c
(1) 於void main_loop (void) 中增加 len = readline (CFG_PROMPT_DSR250N);
(CFG_PROMPT_DSR250N = "DSR-250N # ", 用於顯示u-boot console的提示文字)

4. add u-boot commands
(1) common\cmd_nvedit.c
include product_info.h,

add :
do_printpd, do_getpd, do_setpd, do_savepd

(2) common\cmd_misc.c
include "../board/cavium/cns3000/cns3xxx_phy.h"
include "../board/cavium/cns3000/cns3xxx_symbol.h"

add:
do_phyread, do_phywrite, do_phyreadbypage,
  do_phywritebypage, do_GPIOCtrl, test_wps_button_cmd,
  test_reset_button_cmd, do_testled

(3) common\cmd_mem.c
加入新的do_mem_mtest

5. board\cavium\cns3000\
(1) vega.c
宣告 gpioA_dir, gpioA_set, gpioA_get,
gpioB_dir, gpioB_set, gpioB_get
並設定gpioA與gpioB的初始值

(2) cns3xxx_switch_type.h
參考公板去更改define的value

(3) cns3xxx_phy.h
參考公板去更改define的value

(4) cns3xxx_phy.c
add bcm53128_init_internal_phy等init function,

(5) cns3xxx_gsw.c
   avoid hw auto polling issue (hardward的bug)
- disable hw auto polling before enable MDC/MDIO
- this is workaround solution

6. 修改Makefile

二、Kernel

1. drivers\mtd\maps\cns3xxx-flash.c
定義U-boot, U-boot env, kernel, Cavium env, MD的size與offset

2. drivers\gpio\cns3xxx-gpio.c
(1) #include <mach/gpio.h>
(2) EXPORT_SYMBOL(cns3xxx_gpio_set_value); =>讓其他module使用
(3) 把kernel對gpio的改動mark掉 => 保留boot code的設定

3. \arch\arm\configs
增加dsr250n_defconfig與dsr150n_defconfig (參考公板)

4. mkbootpImage.sh
makefile

5. baudrate
    rootfs/etc/inittab

6. kernel\linux-2.6.31.1\arch\arm\mach-cns3xxx\pcie.c
    pcie1 init

2012-02-02

u-boot & kernel bring up工作紀錄