[U-Boot] iPAQ 21x support (+PXA3xx NAND flash and MMC)
Hi,
I've recently started trying to use U-boot on an iPAQ 214 which runs on a PXA310 cpu. I've got the basic boot up, NAND flash and MMC systems working so far.
I originally tried to use the zylonite's nand.c that's already in u-boot but it was very flaky and didn't support several things I needed like large-page command set and the hardware ecc.
I've now copied the latest pxa3xx nand flash code from the kernel and just modified it to cope without DMA and without IRQs.
I'm not sure it exactly fits in with the u-boot nand code (eg. it does an internal read ID scan to find the right command set) but it works a lot better than the board/zylonite/nand.c. Would this be useful to anyone else?
Also, can I, and how do I go about submitting the stuff for the iPAQ 21x. The only change outside it's own config header and board/ dir is the a slight change to get the MMC code working on the pxa3xx (below).
Thanks,
Oliver
diff --git a/cpu/pxa/mmc.c b/cpu/pxa/mmc.c index d735c8d..3b281d5 100644 --- a/cpu/pxa/mmc.c +++ b/cpu/pxa/mmc.c @@ -126,7 +126,7 @@ mmc_block_read(uchar * dst, ulong src, ulong len) MMC_I_MASK = ~MMC_I_MASK_RXFIFO_RD_REQ; while (len) { if (MMC_I_REG & MMC_I_REG_RXFIFO_RD_REQ) { -#ifdef CONFIG_PXA27X +#if defined(CONFIG_PXA27X) || defined(CONFIG_CPU_MONAHANS) int i; for (i = min(len, 32); i; i--) { *dst++ = *((volatile uchar *)&MMC_RXFIFO); @@ -558,7 +558,11 @@ mmc_init(int verbose) set_GPIO_mode(GPIO6_MMCCLK_MD); set_GPIO_mode(GPIO8_MMCCS0_MD); #endif +#ifdef CONFIG_CPU_MONAHANS + CKENA |= CKENA_12_MMC0; +#else CKEN |= CKEN12_MMC; /* enable MMC unit clock */ +#endif
MMC_CLKRT = MMC_CLKRT_0_3125MHZ; MMC_RESTO = MMC_RES_TO_MAX;
Hi Oliver,
On Sat, Nov 29, 2008 at 02:03:25PM +0000, Oliver Ford wrote:
I've recently started trying to use U-boot on an iPAQ 214 which runs on a PXA310 cpu. I've got the basic boot up, NAND flash and MMC systems working so far.
I originally tried to use the zylonite's nand.c that's already in u-boot but it was very flaky and didn't support several things I needed like large-page command set and the hardware ecc.
I've now copied the latest pxa3xx nand flash code from the kernel and just modified it to cope without DMA and without IRQs.
Great.
I'm not sure it exactly fits in with the u-boot nand code (eg. it does an internal read ID scan to find the right command set) but it works a lot better than the board/zylonite/nand.c. Would this be useful to anyone else?
Yes, absolutely - to me. I'm sitting on this at this very moment :)
I was also thinking about implementing this as a PXA3xx generic layer for small pages, large pages, 8bit and 16bit so the same code does not need to be copied to all the board implementations over and over again.
But I'm not sure whether there are any plans to do this as I didn't follow the development of this project for a long time.
Anyways, I'd appreciate if you could send over what you got.
Many thanks, Daniel
--On Saturday, November 29, 2008 09:03:25 AM -0500 Oliver Ford ipaqlinux@oliford.co.uk wrote:
Hi,
I've recently started trying to use U-boot on an iPAQ 214 which runs on a PXA310 cpu. I've got the basic boot up, NAND flash and MMC systems working so far.
....
I'm not sure it exactly fits in with the u-boot nand code (eg. it does an internal read ID scan to find the right command set) but it works a lot better than the board/zylonite/nand.c. Would this be useful to anyone else?
I'm pretty interested. NAND on the pxa320 is proving to be a pain to us.
What's your boot sequence look like? Are you using the mobm from the BSP? Are you using the nand_spl from u-boot?
Adrian -- Linux Software Engineer | EuroTech, Inc. | www.eurotech-inc.com
Adrian Filipi wrote:
I'm pretty interested. NAND on the pxa320 is proving to be a painto us.
It seems I'd forgotten to cc' the list on my reply to Daniel so I've fw'ed that on now - see that msg for some of the details and the source.
It should work ok for the pxa320 but I think there is a #define that needs changing because the controller clock speed is different. I think the docs said that that was the only difference.
What's your boot sequence look like?
Not much at the moment, I've just been playing with it. Currently I let the OBM load u-boot from flash and then u-boot loads the kernel off of the MMC card because I'm having problems with JFFS2 on the NAND within linux itself (Is JFFS2 supposed to be that slow??).
Are you using the mobm from the BSP?
Bear in mind this is an iPAQ so a complete retailed system. I can't get any help or info from Marvell or HP so I'm doing everything by poking it and seeing.
If the MOBM is what I know as just the OBM then yes, but it's the winCE one (they are apparently slightly different). The OBM loaded the winCE bootloader from 0x40000-0x80000 in the flash to 0x83C00000 in RAM. I've just put U-Boot there and let the OBM load it up. The other advantage being that the MMC and NAND MFP configs and basics have already been set.
I daren't touch the OBM because I can't reflash the device if it fails to boot and the OBM lets me boot off of the MMC card (it's "diagnostic function") if I wipe the later boot stages.
Are you using the nand_spl from u-boot?
Not sure what that is. I'm afraid I'm still on the learning curve as I only saw u-boot for the first time on Thursday and hadn't touched the NAND flash before the weekend before.
Hope that helps,
Oliver
On Mon, Dec 01, 2008 at 07:19:47PM +0000, Oliver Ford wrote:
I'm pretty interested. NAND on the pxa320 is proving to be a painto us.
It seems I'd forgotten to cc' the list on my reply to Daniel so I've fw'ed that on now - see that msg for some of the details and the source.
It should work ok for the pxa320 but I think there is a #define that needs changing because the controller clock speed is different. I think the docs said that that was the only difference.
What about the idea adding PXA3xx generic NAND flash support code? As far as I've seen, every board so far duplicates NAND code from some other board implementation which can't be intended.
Best regards, Daniel
participants (3)
-
Adrian Filipi -
Daniel Mack -
Oliver Ford