August 2010 - U-Boot

[U-Boot] Booting from Nand Flash base on i.MX51.
by shulin.zhou 24 Aug '10

24 Aug '10

Hi, I am using mx51 base board, I want to make u-boot booting from nand flash. Does anyone knows how to modify the u-boot source? Does add some code to init the nand flash controller in flash_header.S's dcd section? Does anyone have u-boot booting from NAND on mx51? Any repository, or a patch that might be available? Best Regards, Shulin

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Re: [U-Boot] Non-experimental U-Boot compilation
by Reinhard Meyer 24 Aug '10

24 Aug '10

Dear sandeep suresh, > Dear Reinhard Meyer, > Appreciate your quick response. I had done this earlier > before posting this mail, but with the same problem: > step 1) export PATH=$PATH:/work/arm/4.3.2/bin > step 2) make distclean > step 3) make AT91SAM9260ek_config > step 4)make > Can you please help me further, please. I can't help you with the following tasks: 1. find out what are the differences between 9260-EK and 9G20-EK ? 2. find out what subtle differences might exist between 9260 and 9G20 SoC? It might be more than "AT91SAM9G20 = 400MHz version of AT91SAM9260"... And I can't see in above transcript where you set the #define I mentioned. "#ifdef CONFIG_AT91SAM9G20EK" exists in various places in the source, but I do not know if that ever was a really working port or just someone starting on it. Reinhard PS: it is mandatory to post replies to the mailing list as well!

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[U-Boot] Booting from Nand based on i.MX51
by shulin.zhou 24 Aug '10

24 Aug '10

Hi, I am using mx51 base board, I want to make u-boot booting from nand flash. Does anyone knows how to modify the u-boot source? Does add some code to init the nand flash controller in flash_header.S's dcd section? Does anyone have u-boot booting from NAND on mx51? Any repository, or a patch that might be available? Best Regards, Shulin

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[U-Boot] i.mx51 nand boot.
by 周书林 24 Aug '10

24 Aug '10

hi,all: I want to use i.MX51 base board to booting u-boot from nand flash,how can I do? thanks best regards shulin

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[U-Boot] Invitation to connect on LinkedIn
by yefeng fan 24 Aug '10

24 Aug '10

LinkedIn ------------yefeng fan requested to add you as a connection on LinkedIn: ------------------------------------------ Srinath, I'd like to add you to my professional network on LinkedIn. - yefeng Accept invitation from yefeng fan http://www.linkedin.com/e/fds2np-gd8g6huf-1q/YhLefj14Y3m-0E8v1ZCDgtixJP5Kn9… View invitation from yefeng fan http://www.linkedin.com/e/fds2np-gd8g6huf-1q/YhLefj14Y3m-0E8v1ZCDgtixJP5Kn9… ------ (c) 2010, LinkedIn Corporation

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[U-Boot] Driver for CONFIG_CF_QSPI
by Richard Retanubun 24 Aug '10

24 Aug '10

Hi TC, I am looking to use the QSPI for MCF5270 and noticed that the cf_spi driver only stubs this part. Any chance there are CF_QSPI driver code written somewhere but just not submitted upstream? Sorry for overloading the question, any pointers to where I can find it for uClinux also? Thanks for your time - Richard Retanubun

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[U-Boot] [PATCH] Fixing spi erase for S25FL128P_256K
by Marc-André Hébert 24 Aug '10

24 Aug '10

The spansion_erase currently only works when the sector size is 64KB. cmd[1] should contain the higher 8 bit of the 24 bit address of the sector to be erased. Currently it is holding the sector index to be erased which happens to be the same thing when the sector size is 64KB. Signed-off-by: Marc-Andre Hebert <marc-andre.hebert(a)humanware.com> --- drivers/mtd/spi/spansion.c | 7 +++---- 1 files changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/mtd/spi/spansion.c b/drivers/mtd/spi/spansion.c index d6c1a5f..94489af 100644 --- a/drivers/mtd/spi/spansion.c +++ b/drivers/mtd/spi/spansion.c @@ -262,7 +262,6 @@ int spansion_erase(struct spi_flash *flash, u32 offset, size_t len) return -1; } - len /= sector_size; cmd[0] = CMD_S25FLXX_SE; cmd[2] = 0x00; cmd[3] = 0x00; @@ -274,8 +273,8 @@ int spansion_erase(struct spi_flash *flash, u32 offset, size_t len) } ret = 0; - for (actual = 0; actual < len; actual++) { - cmd[1] = (offset / sector_size) + actual; + for (actual = 0; actual < len; actual+=sector_size) { + cmd[1] = (offset + actual) >> 16; ret = spi_flash_cmd(flash->spi, CMD_S25FLXX_WREN, NULL, 0); if (ret < 0) { @@ -298,7 +297,7 @@ int spansion_erase(struct spi_flash *flash, u32 offset, size_t len) } debug("SF: SPANSION: Successfully erased %u bytes @ 0x%x\n", - len * sector_size, offset); + len, offset); spi_release_bus(flash->spi); return ret; -- 1.6.0.4

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[U-Boot] Add support for Winbond W25Q64 SPI flash (updated)
by Graeme Smecher 24 Aug '10

24 Aug '10

This patch adds support for Winbond W25Q64 SPI flash. It's tested on a custom Spartan-6 board, and used on Xilinx' SP601 and SP605 evaluation boards. (Patch now includes signed-off-by and description. Sorry, I'm still picking up git's e-mail flow.)

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Re: [U-Boot] FW: which protocol do I use to send S-record files when using the loads command ?
by Jef Mangelschots 23 Aug '10

23 Aug '10

Ok, here is a summary of what I have found out so, with the help of Wolfgang. Many thanks. 1) Wolfgang refers to the manual for system setup: http://www.denx.de/wiki/view/DULG/SystemSetup He recommends Linux programs cu and Kermit. 2) When using the "loads" command to upload an S-record file, only use the upload text feature of your terminal emulator. Do not use any of the protocols (like Kermit, YMODEM, ...). In the Windows program Teraterm, this corresponds to menu: File | Send file ... In Hyperterminal, this would be Transfer | Send text File ... 3) Also, U-boot does NOT use Hardware protocol or XON/OFF. So protocol is set to None. 4) I can not get this to work on our system (our U-boot is configured for 115200 baud). The following explanation is based on my observation. I might be wrong and please correct me if I am: U-boot can not keep up with the incoming text stream while parsing the S-records, i.e. I saw that it processed the first S0-record correctly, but when parsing the next record, it breaks off because the following record contains junk. As far as I can see, this seems to be because the Terminal program keeps sending data when U-boot is busy parsing a received S-record. Even after the S-record parser breaks off, the terminal program keeps sending the file content, which U-boot interprets a unknown commands. The junk record is basically what is left in the buffer by the time U-boot gets around to parsing the next record. 5) I was able to make this work by slowing down the file upload. In some terminal programs (like TeraTerm, menu Setup | Serial port ...) you can specify a delay after every character and a delay after every line. The above theory suggest (and was also suggested by Wolfgang) to put in a delay after every line to allow U-boot to process. However that did not work for me, even with putting in delays of 500 to 600 ms after each line. I might make it work with putting in higher values but that would be ridiculous. I was able to make it work with putting in delays after each character. Unfortunately, Teraterm and many other terminal programs do not allow delays of less than 1 msec. It works for me with a 1 msec delay after each character but at a grueling slow pace. A file of 3 Mbytes takes hours. 6) maybe I can get this to work by making the RX buffer much bigger, but haven't tried it yet. 7) Our board is based on the PowerPC-based ADS5121running at 400MHz. U-boot is configured at 115200 baud 8) People that use Kermit under Linux seem to have no problem, but I do not know in what sense their systems differ from mine. 9) Please do not suggest I switch to Linux. it is not an option. Personally I would like to, but we can not enforce this upon our clients. 10) The system I work on is a bareboard embedded system using U-boot to start up. That is why we are trying to use S-record files for uploading new programs, and not the more efficient FTP used in Linux.

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[U-Boot] Kernel copy from NOR to RAM
by Nicolas Luna 23 Aug '10

23 Aug '10

Hi guys, I'm using OMAP-L138 (ARM based) with NOR flash and I'll like to know in which file uboot copies kernel from NOR to RAM? Thanks Nicolas

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