- 메뉴얼
http://www.denx.de/wiki/U-Boot/Documentation
- 소스확인
- Uboot Command
1.1 Uboot Config 확인
- Uboot 기본설정확인
include/config.h include/configs/xxxx //board name #define CONFIG_CMD_xxx // Command 지원확인 #define CONFIG_ENV_OFFSET // ENV 저장부분 #define CONFIG_ENV_ADDR
SoC에따른 Uboot
http://www.denx.de/wiki/U-Boot/Custodians
1.2 Uboot Env NFS 설정
- TI-NFS SETTING EXAMPLE
setenv ethaddr 00:11:22:33:04:55 setenv ipaddr 192.168.1.4 setenv serverip 192.168.1.100 setenv netmask 255.255.255.0 setenv broadcast 192.168.1.255 setenv gateway 192.168.1.1 setenv bootargs 'console=ttyS1,115200n8 rw mem=48M root=/dev/nfs nfsrootdebug rootdelay=4 nfsroot=192.168.1.100:/home/jhlee/dm368/mt5/Source/ipnc_rdk/target/filesys_dm368,nolock mem=48M cmemk.phys_start="0x83000000" cmemk.phys_end="0x88000000" cmemk.phys_start_1="0x00001000" cmemk.phys_end_1="0x00008000" cmemk.pools_1="1x28672" cmemk.allowOverlap=1 eth=00:0C:0C:A0:04:22 ip=192.168.1.168 nohz=off highres=off clocksource=acpi_pm lpj=1077248 earlyprintk'
안에들어가는 옵션은 Filesystem에 따라 다양하며, 위에서 보는거와 같이 디버깅을 위해서,
earlyprintk , nfsrootdebug 를 추가 가능하다.
또한, mount 시점을 delay를 주는 것도 가능하다.
quiet
2. Uboot의 MII 명령
MII는 Media indepenent interface로 LAN에서 사용하는 표준 Interface이며, 이를 이용하여 일반적으로 사용되어지는 Register 값들을 확인가능하다.
- Uboot시 아래 mii phy 발견확인
In: serial Out: serial Err: serial ARM Clock :- 432MHz DDR Clock :- 340MHz Ethernet PHY: GENERIC @ 0x01 Hit any key to stop autoboot: 0
- MII Device의 갯수 및 주소 파악
DM368 IPNC :>mii device MII devices: 'GENERIC @ 0x01' Current device: 'GENERIC @ 0x01'
2.1 Uboot MII 명령어
- Uboot MII 명령어
- mii device Lists available devices. // 사용가능한 MII Device 보여줌 - mii device Set current device. // MII Device 설정 - mii read Reads register 'reg' from MII PHY 'addr'. // MII Device의 Register Read - mii write Writes 'data' to register 'reg' at MII PHY 'addr'. // MII Device의 Register Write - mii dump Displays data of register 'reg' from MII PHY 'addr'. // MII Device Register Dump
- 관련소스
drivers/net/stmmac/mdio.c
- Offset Register Name
- 00 Basic Mode Configuration
- 01 Basic Mode Status
- 02 PHY ID #1
- 03 PHY ID #2
- 04 AutoNegotation Advertisement
- 05 Link Partner Ability
- 06 AutoNegotation Expansion
- The bits of the MII status
- 0x8000 Capable of 100baseT4.
- 0x7800 Capable of 10/100 HD/FD (most common).
- 0x0040 Preamble suppression permitted.
- 0x0020 Autonegotiation complete.
- 0x0010 Remote fault.
- 0x0008 Capable of Autonegotiation.
- 0x0004 Link established ("sticky"* on link failure)
- 0x0002 Jabber detected ("sticky"* on transmit jabber)
- 0x0001 Extended MII register exist.
https://en.wikipedia.org/wiki/Media-independent_interface
2.2 Uboot MII 사용방법 및 확인
- Basic Mode Configuration
DM368 IPNC# mii write 1 0 0 // addr reg data DM368 IPNC# mii read 1 0 // addr reg data 0000 DM368 IPNC# mii write 1 0 3100 // default setting (Basic Mode Configuration) DM368 IPNC# mii read 1 0 3100 DM368 IPNC# mii write 1 0 B100 // + Reset DM368 IPNC# mii read 1 0 3100
- 상위 Register 들 점검
DM368 IPNC :>mii read 1 0 // Basic Mode Configuration 3100 DM368 IPNC :>mii read 1 1 // Basic Mode Status 7849 DM368 IPNC :>mii read 1 2 // PHY ID #1 0181 DM368 IPNC :>mii read 1 3 // PHY ID #2 B8B0 DM368 IPNC :>mii read 1 4 // AutoNegotation Advertisement 01E1 DM368 IPNC :>mii write 1 0 1000 DM368 IPNC :>mii read 1 0
- MII Dump로 쉽게 분석
# mii dump 1 0 // Basic Mode Configuration 0. (3100) -- PHY control register -- (8000:0000) 0.15 = 0 reset (4000:0000) 0.14 = 0 loopback (2040:2000) 0. 6,13 = b01 speed selection = 100 Mbps (1000:1000) 0.12 = 1 A/N enable // Auto Nego (0800:0000) 0.11 = 0 power-down (0400:0000) 0.10 = 0 isolate (0200:0000) 0. 9 = 0 restart A/N (0100:0100) 0. 8 = 1 duplex = full (0080:0000) 0. 7 = 0 collision test enable (003f:0000) 0. 5- 0 = 0 (reserved) # mii dump 1 1 // Basic Mode Status 1. (786d) -- PHY status register -- (8000:0000) 1.15 = 0 100BASE-T4 able (4000:4000) 1.14 = 1 100BASE-X full duplex able (2000:2000) 1.13 = 1 100BASE-X half duplex able (1000:1000) 1.12 = 1 10 Mbps full duplex able (0800:0800) 1.11 = 1 10 Mbps half duplex able (0400:0000) 1.10 = 0 100BASE-T2 full duplex able (0200:0000) 1. 9 = 0 100BASE-T2 half duplex able (0100:0000) 1. 8 = 0 extended status (0080:0000) 1. 7 = 0 (reserved) (0040:0040) 1. 6 = 1 MF preamble suppression (0020:0020) 1. 5 = 1 A/N complete //Auto Nego (0010:0000) 1. 4 = 0 remote fault (0008:0008) 1. 3 = 1 A/N able (0004:0004) 1. 2 = 1 link status (0002:0000) 1. 1 = 0 jabber detect (0001:0001) 1. 0 = 1 extended capabilities # mii dump 1 2 // PHY ID #1 2. (0243) -- PHY ID 1 register -- (ffff:0243) 2.15- 0 = 579 OUI portion # mii dump 1 3 // PHY ID #2 3. (0c54) -- PHY ID 2 register -- (fc00:0c00) 3.15-10 = 3 OUI portion (03f0:0050) 3. 9- 4 = 5 manufacturer part number (000f:0004) 3. 3- 0 = 4 manufacturer rev. number # mii dump 1 4 // AutoNegotation Advertisement 4. (01e1) -- Autonegotiation advertisement register -- (8000:0000) 4.15 = 0 next page able (4000:0000) 4.14 = 0 reserved (2000:0000) 4.13 = 0 remote fault (1000:0000) 4.12 = 0 reserved (0800:0000) 4.11 = 0 asymmetric pause (0400:0000) 4.10 = 0 pause enable (0200:0000) 4. 9 = 0 100BASE-T4 able (0100:0100) 4. 8 = 1 100BASE-TX full duplex able (0080:0080) 4. 7 = 1 100BASE-TX able (0040:0040) 4. 6 = 1 10BASE-T full duplex able (0020:0020) 4. 5 = 1 10BASE-T able (001f:0001) 4. 4- 0 = 1 selector = IEEE 802.3 # mii dump 1 5 //Link Partner Ability 5. (45e1) -- Autonegotiation partner abilities register -- (8000:0000) 5.15 = 0 next page able (4000:4000) 5.14 = 1 acknowledge (2000:0000) 5.13 = 0 remote fault (1000:0000) 5.12 = 0 (reserved) (0800:0000) 5.11 = 0 asymmetric pause able (0400:0400) 5.10 = 1 pause able (0200:0000) 5. 9 = 0 100BASE-T4 able (0100:0100) 5. 8 = 1 100BASE-X full duplex able (0080:0080) 5. 7 = 1 100BASE-TX able (0040:0040) 5. 6 = 1 10BASE-T full duplex able (0020:0020) 5. 5 = 1 10BASE-T able (001f:0001) 5. 4- 0 = 1 selector = IEEE 802.3 # mii info // MII PHY 관련정보 PHY 0x01: OUI = 0x90C3, Model = 0x05, Rev = 0x04, 100baseT, FDX
https://en.wikipedia.org/wiki/Management_Data_Input/Output
https://en.wikipedia.org/wiki/Autonegotiation
http://lostintransit.se/tag/autonegotiation/
http://units.folder101.com/cisco/sem1/Notes/ch6-ethernet/autonegotiation.htm
3. Uboot I2C 와 USB 명령어
- Uboot에서 USB 명령어
# usb dev 0
USB device 0:
Device 0: Vendor: General Rev: 5.00 Prod:
Type: Removable Hard Disk
Capacity: 3950.0 MB = 3.8 GB (8089600 x 512)
... is now current device
# usb part 0
Partition Map for USB device 0 -- Partition Type: DOS
Partition Start Sector Num Sectors Type
1 778135908 1141509631 72
2 168689522 1936028240 65
3 1869881465 1936028192 79
4 -1409286144 55499 d
- Uboot에서 I2C명령어
imd {i2c_chip} {addr}{.0, .1, .2} {len}
imm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
imw {i2c_chip} {addr}{.0, .1, .2} {data} [{count}]
4. Uboot NAND 명령어
CPU마다 기본적으로 지원되는 Command는 많이 다르며, 특정 CPU에서만 지원되는 CMD도 있다.
본인이 원하면 CMD를 추가하여 설정을 하고 포팅을 해서 사용을 해야 하며 관련내용은 Command Config에서 확인하자.
nand write 관련 command
nand write : 일반적인 raw data를 기록한다.
nand write.e : NAND의 ecc block을 사용하여 기록을 한다.
nand write.jffs2 : jffs2 filesystem을 기록한다.
nandecc hw 2
nandecc hw 0 : ecc 변경
https://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/100/t/210595
nand scrub : bbt까지 다 없애고 초기화
nand erase : nand erase 진행
세부설명은 이곳을 봐도 될 것 같음
http://wiki.openmoko.org/wiki/U-Boot_commands#Loading_Kernel_from_NAND
http://wiki.openmoko.org/wiki/NAND_bad_blocks
http://www.aesop.or.kr/index.php?mid=Board_Community_QandA&page=41&listStyle=webzine&document_srl=77412