2009-09-22 08:01:27 SD/MMC problem

Wang Mengyin (CHINA)

Message: 80243

Hi Guys! I get a problem when using SPI-MMC driver on my custom blackfin BF532 board.

the SPI-MMC driver on 2008R1.5 works well , but when I transfer to 2009R1 Release ,I got a error message "error -84 whilst initialising SD card" when I insert the SD card.

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2009-09-22 08:20:04 Re: SD/MMC problem

Wang Mengyin (CHINA)

Message: 80244

Here is kernel information:

mmc0: clock 0Hz busmode 2 powermode 1 cs 1 Vdd 21 width 0 timing 0

mmc_spi spi0.5: mmc_spi: power up (21)

mmc0: clock 400000Hz busmode 2 powermode 2 cs 1 Vdd 21 width 0 timing 0

mmc_spi spi0.5: mmc_spi: power on (21)

mmc_spi spi0.5: requested mode not fully supported

mmc_spi spi0.5: can't change chip-select polarity

mmc0: starting CMD0 arg 00000000 flags 000000c0

mmc_spi spi0.5: mmc_spi: CMD0, resp R1

mmc0: req done (CMD0): 0: 00000001 00000000 00000000 00000000

mmc0: starting CMD8 arg 000001aa flags 000002f5

mmc_spi spi0.5: mmc_spi: CMD8, resp R3/R4/R7

mmc_spi spi0.5: ... CMD8 response SPI_R3/R4/R: resp 0005 ffffffff

mmc0: req done (CMD8): -22: 00000005 ffffffff 00000000 00000000

mmc0: starting CMD5 arg 00000000 flags 000002e1

mmc_spi spi0.5: mmc_spi: CMD5, resp R3/R4/R7

mmc_spi spi0.5: ... CMD5 response SPI_R3/R4/R: resp 0005 ffffffff

mmc0: req done (CMD5): -22: 00000005 ffffffff 00000000 00000000

mmc0: starting CMD55 arg 00000000 flags 000000f5

mmc_spi spi0.5: mmc_spi: CMD55, resp R1

mmc0: req done (CMD55): 0: 00000001 00000000 00000000 00000000

mmc0: starting CMD41 arg 00000000 flags 000000e1

mmc_spi spi0.5: mmc_spi: CMD41, resp R1

mmc0: req done (CMD41): 0: 00000001 00000000 00000000 00000000

mmc0: starting CMD0 arg 00000000 flags 000000c0

mmc_spi spi0.5: mmc_spi: CMD0, resp R1

mmc0: req done (CMD0): 0: 00000001 00000000 00000000 00000000

mmc0: starting CMD58 arg 00000000 flags 00000280

mmc_spi spi0.5: mmc_spi: CMD58, resp R3/R4/R7

mmc0: req done (CMD58): 0: 00000001 00ff8000 00000000 00000000

mmc0: clock 400000Hz busmode 2 powermode 2 cs 1 Vdd 20 width 0 timing 0

mmc0: starting CMD0 arg 00000000 flags 000000c0

mmc_spi spi0.5: mmc_spi: CMD0, resp R1

mmc0: req done (CMD0): 0: 00000001 00000000 00000000 00000000

mmc0: starting CMD8 arg 000001aa flags 000002f5

mmc_spi spi0.5: mmc_spi: CMD8, resp R3/R4/R7

mmc_spi spi0.5: ... CMD8 response SPI_R3/R4/R: resp 0005 ffffffff

mmc0: req done (CMD8): -22: 00000005 ffffffff 00000000 00000000

mmc0: starting CMD55 arg 00000000 flags 000000f5

mmc_spi spi0.5: mmc_spi: CMD55, resp R1

mmc0: req done (CMD55): 0: 00000001 00000000 00000000 00000000

mmc0: starting CMD41 arg 00000000 flags 000000e1

mmc_spi spi0.5: mmc_spi: CMD41, resp R1

mmc0: req done (CMD41): 0: 00000001 00000000 00000000 00000000

mmc0: starting CMD55 arg 00000000 flags 000000f5

mmc_spi spi0.5: mmc_spi: CMD55, resp R1

mmc0: req done (CMD55): 0: 00000001 00000000 00000000 00000000

mmc0: starting CMD41 arg 00000000 flags 000000e1

mmc_spi spi0.5: mmc_spi: CMD41, resp R1

mmc0: req done (CMD41): 0: 00000001 00000000 00000000 00000000

mmc0: starting CMD55 arg 00000000 flags 000000f5

mmc_spi spi0.5: mmc_spi: CMD55, resp R1

mmc0: req done (CMD55): 0: 00000001 00000000 00000000 00000000

mmc0: starting CMD41 arg 00000000 flags 000000e1

mmc_spi spi0.5: mmc_spi: CMD41, resp R1

mmc0: req done (CMD41): 0: 00000001 00000000 00000000 00000000

mmc0: starting CMD55 arg 00000000 flags 000000f5

mmc_spi spi0.5: mmc_spi: CMD55, resp R1

mmc0: req done (CMD55): 0: 00000001 00000000 00000000 00000000

mmc0: starting CMD41 arg 00000000 flags 000000e1

mmc_spi spi0.5: mmc_spi: CMD41, resp R1

mmc0: req done (CMD41): 0: 00000000 00000000 00000000 00000000

mmc0: starting CMD59 arg 00000001 flags 00000080

mmc_spi spi0.5: mmc_spi: CMD59, resp R1

mmc0: req done (CMD59): 0: 00000000 00000000 00000000 00000000

mmc0: starting CMD10 arg 00000000 flags 000000b5

mmc0: blksz 16 blocks 1 flags 00000200 tsac 0 ms nsac 64

mmc_spi spi0.5: mmc_spi: CMD10, resp R1

mmc_spi spi0.5: mmc_spi: read block, 16 bytes

mmc_spi spi0.5: read - crc error: crc_val=0x1d81, computed=0x1d80 len=16

mmc_spi spi0.5: read status -84

mmc0: req done (CMD10): 0: 00000000 00000000 00000000 00000000

mmc0: 0 bytes transferred: -84

mmc0: clock 0Hz busmode 2 powermode 0 cs 1 Vdd 0 width 0 timing 0

mmc_spi spi0.5: mmc_spi: power off (0)

mmc0: error -84 whilst initialising SD card

mmc0: clock 0Hz busmode 2 powermode 0 cs 1 Vdd 0 width 0 timing 0

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2009-09-22 11:13:52 Re: SD/MMC problem

Wang Mengyin (CHINA)

Message: 80251

When I use 2008R1.5 version, It works fine.

root:/> mkdir /mnt/sd

root:/> mount -t vfat /dev/spi_mmc /mnt/sd

[17179637.428000] New MMC/SD card found: 119 MB(125698048 bytes)

[17179637.440000] spi_mmc:

root:/> cd /mnt/sd

root:/mnt/sd> ls

test.txt wang.txt

root:/mnt/sd>

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2009-09-22 22:04:11 Re: SD/MMC problem

Yi Li (CHINA)

Message: 80265

How about try some other SD/MMC cards? If always fails, there is problem.

The mmc_spi driver has been tested with many SD/mmc cards, but it cannot guarantee every SD/MMC card can work well.

-Yi

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2009-09-22 22:20:12 Re: SD/MMC problem

Yi Li (CHINA)

Message: 80266

If most mmc/sd cardscannot work on your board, then read:

docs.blackfin.uclinux.org/doku.php?id=linux-kernel:drivers:spi_mmc

As the document says: "In order to operate the SD/MMC Cards in SPI Mode 3 it is recommended to have 10kOhm Pull-Up Resistors to VDD on Blackfin SPI_SSELx, SPI_SCK, SPI_MISO and SPI_MOSI. "

-Yi

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2009-09-22 23:00:23 Re: SD/MMC problem

Wang Mengyin (CHINA)

Message: 80267

Thanks for you reply.

I have tried three different SD card: Kingston 128MB Kingston 2GB Adapter 1GB.None of them can work currently. The error code are the same.

We have 10k pull-up resistors to VDD on SPI_SSELx,SPI_MOSI. but no resistors on SPI_MISO or SPI_SCK. I will add these two resistors.

But the SD card did work on 2008 release. I can mount a vfat patteron ,open a txt file which was created by Notepad on Windows XP.

By the way, I have a SPI EEPROM (M25P64) on SPI line. Does it affect the operation of SD card?

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2009-09-22 23:30:20 Re: SD/MMC problem

Yi Li (CHINA)

Message: 80269

> We have 10k pull-up resistors to VDD on SPI_SSELx,SPI_MOSI. but no resistors on SPI_MISO or SPI_SCK. I will add these two resistors.

For SPI_MODE_3, the pull-ups are required. Another choice is to use GPIO as chip select, this way, you can use SPI_MODE_0. SPI_MODE_0 is better for mmc_spi. See: docs.blackfin.uclinux.org/doku.php?id=spi

> But the SD card did work on 2008 release. I can mount a vfat patteron ,open a txt file which was created by Notepad on Windows XP.

I am not clear. 2008R1.5 uses a private spi_mmc driver, 2009R1 uses mmc_spi driver from mainline kernel. Maybe the SPI_MODE is different?

> By the way, I have a SPI EEPROM (M25P64) on SPI line. Does it affect the operation of SD card?

If the two devices access spi bus concurrently - yes, mmc_spi cannot work well. In 2009R1 we use spi_lock_bus() to protect mmc transaction. You may enable "CONFIG_SPI_BFIN_LOCK " to make it work.

-Yi

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2009-09-23 01:45:14 Re: SD/MMC problem

Wang Mengyin (CHINA)

Message: 80272

I found a mistake in circuit design. The SPI_SCK was pulled down to GND via a 10K resistors . After I disconnect this part, the driver works !

Thanks Yi Li.

"root:/> modprobe mmc-spi

mmc_spi spi0.5: ASSUMING 3.2-3.4 V slot power

mmc_spi spi0.5: SD/MMC host mmc0, no DMA, no WP, no poweroff

mmc_spi spi0.5: requested mode not fully supported

mmc_spi spi0.5: can't change chip-select polarity