For panda, does sd/mmc can work with nfs?

gary69393

Intellectual 370 points

Other Parts Discussed in Thread: TWL6030

Hello,

Does someone had tested sd/mmc with nfs?

After tried latest mainline tree and linaro 3.1, I found sd card doesn't work

with nfs or usb fs, and it works well with mmc fs. However blaze board doesn't

have the problem.

It seems the issue is related to power supply.

For blaze, I can see there is an extra mmc0 interrupt num which should be handled by

twl6030.

root@localhost:/root> cat /proc/interrupts | grep mmc
           CPU0       CPU1
91:        145           0         GIC   mmc1
115:        145        0         GIC   mmc0
384:          1           0     twl6030 mmc0

But for panda, only two mmc interrupt nums exist.

root@localhost:/root> cat /proc/interrupts |grep mmc
91: 13 GIC mmc1
115: 0 GIC mmc0

PS: From schemtic, I found USB phy and mmc share same VIO_1V8, is it has impact about the issue.

Thanks,

over 13 years ago

0 gary69393 over 13 years ago

Intellectual 370 points

Actually, if sd/mmc is initialized before usb host, then sd/mmc also works, but hot-plug sd/mmc card is failed.

0 David Anders over 13 years ago

Prodigy 180 points

i have not tested the linaro builds with this configuration, however i have tested mainline kernel with no issues.

Dave

0 gary69393 over 13 years ago in reply to David Anders

Intellectual 370 points

Interesting, I tested pandaboard Rev A3 with mainline kernel 3.4-rc1, and this issue is still exist.

Thanks,

Gary

0 David Anders over 13 years ago in reply to gary69393

Prodigy 180 points

Gary,

i just ran a full test with 3.2, 3.3 and 3.4-rc series, with no failures of any type related to sd/mmc.

Dave

0 gary69393 over 13 years ago in reply to David Anders

Intellectual 370 points

Dave,

Could you confirm what is the version of pandaboard?

I have both panda and blaze in my hand, however blaze works fine,

and I guess this issue related to pull up resistor of mmc's card detect line,

since blaze uses 470k resistor while panda uses 10k resistor.

Thanks,

Gary

0 David Anders over 13 years ago in reply to gary69393

Prodigy 180 points

i tested with A3 same as you posted.

10K is nominal for the pullup resistors as it is implemented on the panda.

i suspect you have a code difference somewhere that is at the root of your issue.

Dave

0 gary69393 over 13 years ago in reply to David Anders

Intellectual 370 points

I don't think so, and also tried latest 3.4.0-rc3 kernel with no luck.

Thanks,

Gary

0 David Anders over 13 years ago in reply to gary69393

Prodigy 180 points

Gary,

please send me a copy of your kernel .config so that i may try it, as well as the exact test conditions you are using to replicate the issue.

Dave

0 gary69393 over 13 years ago in reply to David Anders

Intellectual 370 points

Dave,

I just boot the kernel with nfs or filesystem under usb disk, then just hot plug mmc card after enter into userspace,

but fdisk can't display mmc info. The config file is a little bit big,

upstream-linux$ ls -lh .config
-rwxrwxrwx 1 root root 65K 2012-04-16 15:44 .config

I amn't want pollute the thread, and I already enabled the following options.

1966 CONFIG_MMC=y
1967 # CONFIG_MMC_DEBUG is not set
1968 CONFIG_MMC_UNSAFE_RESUME=y
1969 # CONFIG_MMC_CLKGATE is not set
1970
1971 #
1972 # MMC/SD/SDIO Card Drivers
1973 #
1974 CONFIG_MMC_BLOCK=y
1975 CONFIG_MMC_BLOCK_MINORS=8
1976 CONFIG_MMC_BLOCK_BOUNCE=y
1977 CONFIG_SDIO_UART=y
1978 # CONFIG_MMC_TEST is not set
1979
1980 #
1981 # MMC/SD/SDIO Host Controller Drivers
1982 #
1983 # CONFIG_MMC_SDHCI is not set
1984 # CONFIG_MMC_SDHCI_PXAV3 is not set
1985 # CONFIG_MMC_SDHCI_PXAV2 is not set
1986 CONFIG_MMC_OMAP=y
1987 CONFIG_MMC_OMAP_HS=y

could you tell me which other options should be enabled?

Thanks,

Gary

0 David Anders over 13 years ago in reply to gary69393

Prodigy 180 points

email the .config to x0132446@ti.com

0 gary69393 over 13 years ago

Intellectual 370 points

Seems panda missed card_detect_irq for mmc1 card, below patch fixed this.

---
arch/arm/mach-omap2/board-omap4panda.c |    1 + 
1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-omap2/board-omap4panda.c b/arch/arm/mach-omap2/board-omap4panda.c
index 1b782ba..171c53f 100644
--- a/arch/arm/mach-omap2/board-omap4panda.c
+++ b/arch/arm/mach-omap2/board-omap4panda.c
@@ -255,6 +255,7 @@ static int omap4_twl6030_hsmmc_late_init(struct device *dev)
				__func__, irq);
			return irq;
		}
+               pdata->slots[0].card_detect_irq = irq;
		pdata->slots[0].card_detect = twl6030_mmc_card_detect;
	}
	return 0;
--
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For panda, does sd/mmc can work with nfs?