Sam Song samsongshu@yahoo.com.cn wrote：
Hi,
I got a nudge from some folk chatting with Wolfgang about RESET and did this patch. All for RPXlite_DW board.
- Patch by Sam Song, 21 August 2004:
- Add RESET support for RPXlite_DW board
- Adjust CPU:BUS frequency rato 1:1 when core
frequency less than 50MHz
OK, I give up this patch for it as updated as follows and all against CVS:
* Patch by Sam Song, 31 August 2004: - Updating RPXlite_DW board on RESET/PREBOOT
Index: board/RPXlite_dw/README =================================================================== RCS file: /cvsroot/u-boot/u-boot/board/RPXlite_dw/README,v retrieving revision 1.1 diff -p -u -r1.1 README --- board/RPXlite_dw/README 9 Jun 2004 21:04:49 -0000 1.1 +++ board/RPXlite_dw/README 31 Aug 2004 01:58:04 -0000 @@ -2,9 +2,9 @@ After following the step of Yoo. Jonghoon and Wolfgang Denk, I ported u-boot on RPXlite DW version board: RPXlite_DW or LITE_DW.
-There are three differences between the Yoo-ported RPXlite and the RPXlite_DW. +There are at least three differences between the Yoo-ported RPXlite and the RPXlite_DW.
-Board(in U-BOOT) version(in EmbeddedPlanet) CPU SDRAM FLASH +Board(in U-Boot) version(in EmbeddedPlanet) CPU SDRAM FLASH RPXlite RPXlite CW 850 16MB 4MB RPXlite_DW RPXlite DW 823e 64MB 16MB
@@ -17,6 +17,7 @@ It has the following three features: The default setting is 48MHz.To get a 64MHz u-boot,just add '64' in make command,like
+make distclean make RPXlite_DW_64_config make all
@@ -28,19 +29,21 @@ didn't use EEPROM for ENV is that Planet home.Because of the possibility of using two firewares on this board,I didn't 'disturb' EEPROM.To get NVRAM support,you may use the following build command:
+make distclean make RPXlite_DW_NVRAM_config make all
3. LCD panel support
-To support the Platform better,I added LCD panel(NL6448BC20-08) function.But bewear of -the fact that once you build this support and program it to FLASH,you should make sure -you put workable kernel and ramdisk at the right place in FLASH or through NFS. -Otherwise, you must erase this fireware manually via BDI2000 or ICE tools.So this -function is used for deployment and demo only.Pls look before you leap. +To support the Platform better, I added LCD panel(NL6448BC20-08) function. +For the convenience of debug, CONFIG_PERBOOT was supported. So you just +perss ENTER if you want to get a serial console in boot count down. +Then you can switch to LCD and serial console freely just typing +'run lcd' or 'run ser'. They are only vaild when CONFIG_LCD was enabled.
To get a LCD support u-boot,you can do the following:
+make distclean make RPXlite_DW_LCD_config make all
@@ -68,7 +71,7 @@ make RPXlite_DW_64_LCD_config
The boot process by "make RPXlite_DW_config" could be:
-U-Boot 1.1.1 (Jun 8 2004 - 11:16:30) +U-Boot 1.1.2 (Aug 29 2004 - 15:11:27)
CPU: PPC823EZTnnB2 at 48 MHz: 16 kB I-Cache 8 kB D-Cache Board: RPXlite_DW @@ -84,6 +87,64 @@ u-boot>
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+A word on the U-Boot enviroment variable setting and usage : + +In the beginning, you could just need very simple defult environment variable setting, +like[include/configs/RPXlite.h] : + +#define CONFIG_BOOTCOMMAND \ + "bootp; " \ + "setenv bootargs root=/dev/nfs rw nfsroot=$(serverip):$(rootpath) " \ + "ip=$(ipaddr):$(serverip):$(gatewayip):$(netmask):$(hostname)::off; " \ + "bootm" + +This is enough for kernel NFS test. But as debug process goes on, you would expect +to save some time on environment variable setting and u-boot/kernel updating. +So the default environment variable setting would become more complicated. Just like +the one I did in include/configs/RPXlite_DW.h. + +Two u-boot commands, ku and uu, should be careful to use. They were designed to update +kernel and u-boot image file respectively. You must tftp your image to default address +'100000' and then use them correctly. Yeah, you can create your own command to do this +job. :-) The example u-boot image updating process could be : + +u-boot>t 100000 RPXlite_DW_LCD.bin +Using SCC ETHERNET device +TFTP from server 172.16.115.6; our IP address is 172.16.115.7 +Filename 'RPXlite_DW_LCD.bin'. +Load address: 0x100000 +Loading: ############################# +done +Bytes transferred = 144700 (2353c hex) +u-boot>run uu +Un-Protect Flash Sectors 0-4 in Bank # 1 +Erase Flash Sectors 0-4 in Bank # 1 +.... done +Copy to Flash... done +ff000000: 27051956 552d426f 6f742031 2e312e32 '..VU-Boot 1.1.2 +ff000010: 20284175 67203239 20323030 34202d20 (Aug 29 2004 - +ff000020: 31353a32 303a3238 29000000 00000000 15:20:28)....... +ff000030: 00000000 00000000 00000000 00000000 ................ +ff000040: 00000000 00000000 00000000 00000000 ................ +ff000050: 00000000 00000000 00000000 00000000 ................ +ff000060: 00000000 00000000 00000000 00000000 ................ +ff000070: 00000000 00000000 00000000 00000000 ................ +ff000080: 00000000 00000000 00000000 00000000 ................ +ff000090: 00000000 00000000 00000000 00000000 ................ +ff0000a0: 00000000 00000000 00000000 00000000 ................ +ff0000b0: 00000000 00000000 00000000 00000000 ................ +ff0000c0: 00000000 00000000 00000000 00000000 ................ +ff0000d0: 00000000 00000000 00000000 00000000 ................ +ff0000e0: 00000000 00000000 00000000 00000000 ................ +ff0000f0: 00000000 00000000 00000000 00000000 ................ +u-boot updating finished +u-boot> + +Also for environment updating, 'run eu' could let you erase OLD default environment variable +and then use the working u-boot environment setting. + +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + I'd like to extend my heartfelt gratitute to kind people for helping me work it out. I would particually thank Wolfgang Denk for his nice help.
@@ -93,4 +154,4 @@ Sam Song, samsongshu@yahoo.com.cn Institute of Electrical Machinery and Controls Shanghai University
-June 8,2004 +August 29,2004 Index: include/configs/RPXlite_DW.h =================================================================== RCS file: /cvsroot/u-boot/u-boot/include/configs/RPXlite_DW.h,v retrieving revision 1.2 diff -p -u -r1.2 RPXlite_DW.h --- include/configs/RPXlite_DW.h 19 Jun 2004 21:19:13 -0000 1.2 +++ include/configs/RPXlite_DW.h 31 Aug 2004 01:58:21 -0000 @@ -60,18 +60,20 @@ #define CONFIG_BAUDRATE 9600 /* console default baudrate = 9600bps */
#ifdef CONFIG_LCD -#define CONFIG_BOOTDELAY 12 /* autoboot after 12 seconds */ +#define CONFIG_BOOTDELAY 6 /* autoboot after 12 seconds */ #else #define CONFIG_BOOTDELAY -1 /* autoboot disabled */ #endif
+/* pre-boot commands */ +#define CONFIG_PREBOOT "setenv stdout serial;setenv stdin serial" + #undef CONFIG_BOOTARGS #define CONFIG_EXTRA_ENV_SETTINGS \ "netdev=eth0\0" \ - "nfsargs=setenv bootargs console=ttyS0,9600 root=/dev/nfs rw " \ - "nfsroot=$(serverip):$(rootpath)\0" \ - "ramargs=setenv bootargs console=tty0 console=ttyS0,9600 " \ - "root=/dev/ram rw\0" \ + "nfsargs=setenv bootargs console=tty0 console=ttyS0,9600 " \ + "root=/dev/nfs rw nfsroot=$(serverip):$(rootpath)\0" \ + "ramargs=setenv bootargs console=tty0 root=/dev/ram rw\0" \ "addip=setenv bootargs $(bootargs) " \ "ip=$(ipaddr):$(serverip):$(gatewayip):$(netmask)" \ ":$(hostname):$(netdev):off panic=1\0" \ @@ -82,9 +84,19 @@ "net_nfs=tftp 200000 $(bootfile);run nfsargs addip;bootm\0" \ "gatewayip=172.16.115.254\0" \ "netmask=255.255.255.0\0" \ - "kernel_addr=ff880000\0" \ - "ramdisk_addr=ff980000\0" \ - "" + "kernel_addr=ff040000\0" \ + "ramdisk_addr=ff200000\0" \ + "ku=era $(kernel_addr) ff1fffff;cp.b 100000 $(kernel_addr) " \ + "$(filesize);md $(kernel_addr);" \ + "echo kernel updating finished\0" \ + "uu=protect off 1:0-4;era 1:0-4;cp.b 100000 ff000000 " \ + "$(filesize);md ff000000;" \ + "echo u-boot updating finished\0" \ + "eu=protect off 1:6;era 1:6;reset\0" \ + "lcd=setenv stdout lcd;setenv stdin lcd\0" \ + "ser=setenv stdout serial;setenv stdin serial\0" \ + "verify=no" + #define CONFIG_BOOTCOMMAND "run flash_self"
#define CONFIG_LOADS_ECHO 1 /* echo on for serial download */ @@ -178,6 +190,8 @@ #define CFG_ENV_SIZE 0x8000 /* Total Size of Environment Sector */ #endif
+#define CFG_RESET_ADDRESS ((ulong)((((immap_t *)CFG_IMMR)->im_clkrst.res))) +
/*----------------------------------------------------------------------- * Cache Configuration */ @@ -249,9 +263,12 @@ * power management and some other internal clocks */ #define SCCR_MASK SCCR_EBDF00 -/* Up to 64MHz system clock, we use 1:2 SYSTEM/BUS ratio */ +/* Up to 48MHz system clock, we use 1:1 SYSTEM/BUS ratio */ +#if defined(RPXlite_64MHz) #define CFG_SCCR ( SCCR_TBS | SCCR_EBDF01 ) /* %%%SCCR:0x02020000 */ - +#else +#define CFG_SCCR ( SCCR_TBS | SCCR_EBDF00 ) /* %%%SCCR:0x02000000 */ +#endif
/*----------------------------------------------------------------------- * PCMCIA stuff
*-----------------------------------------------------------------------
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