sd-io CTO error - advice

Hi,

 I am using OMAP.

 I am  trying to extend sd card driver in linux to support sdio.

 When i send CMD 5 - i get CTO error . i dont know whats the problem?.

  if i do enable MMC_DEBUG prints i do get the response sometimes.

  I dont know why the response is not consitent. add some printks it
works sometimes. remove them it does not work.

  I tried sending CMD 5 in a loop - most of the time i do get CTO Errors?.


Any ideas on how to solve this problem?


is it related to the clock - i think it is set to what ever 400KHZ
(this works for MMC/SD Cards)
Is it different for SDIO ?.

The specs says 0-400KHZ during init phase.


Any ideas, where i should look at.

I have set CTO Value to the maximus - 0xff.




MMC1: set_ios: clock 0Hz busmode 1 powermode 0 Vdd 0.00
MMC1: set_ios: clock 400000Hz busmode 1 powermode 1 Vdd 0.21
MMC1: set_ios: clock 400000Hz busmode 1 powermode 2 Vdd 0.21
MMC: starting cmd 05 arg 00000000 flags 00000009
MMC1: CMD5, argument 0x00000000, 32-bit response, CRC
       MMC IRQ 0001 (CMD 5): EOC
MMC1: Response 90ff8000
MMC1: End request, err 0
MMC: req done (05): 0: 90ff8000 00000000 00000000 00000000
MMC: starting cmd 05 arg 00000000 flags 00000009
MMC1: CMD5, argument 0x00000000, 32-bit response, CRC
       MMC IRQ 0001 (CMD 5): EOC
MMC1: Response 90000000
MMC1: End request, err 0
MMC: req done (05): 0: 90000000 00000000 00000000 00000000
MMC: starting cmd 05 arg 00000000 flags 00000009
MMC1: CMD5, argument 0x00000000, 32-bit response, CRC
       MMC IRQ 0080 (CMD 5): CTO
MMC1: Command timeout, CMD5
MMC1: Response 00000000
MMC1: End request, err 1
MMC: req done (05): 1: 00000000 00000000 00000000 00000000
MMC: starting cmd 05 arg 00000000 flags 00000009
MMC1: CMD5, argument 0x00000000, 32-bit response, CRC
       MMC IRQ 0080 (CMD 5): CTO
MMC1: Command timeout, CMD5
MMC1: Response 00000000
MMC1: End request, err 1
MMC: req done (05): 1: 00000000 00000000 00000000 00000000
MMC: starting cmd 05 arg 00000000 flags 00000009
MMC1: CMD5, argument 0x00000000, 32-bit response, CRC
       MMC IRQ 0080 (CMD 5): CTO
MMC1: Command timeout, CMD5
MMC1: Response 00000000
MMC1: End request, err 1
MMC: req done (05): 1: 00000000 00000000 00000000 00000000
MMC: starting cmd 05 arg 00000000 flags 00000009
MMC1: CMD5, argument 0x00000000, 32-bit response, CRC
       MMC IRQ 0080 (CMD 5): CTO
MMC1: Command timeout, CMD5
MMC1: Response 00000000
MMC1: End request, err 1
MMC: req done (05): 1: 00000000 00000000 00000000 00000000
MMC: starting cmd 05 arg 00000000 flags 00000009
MMC1: CMD5, argument 0x00000000, 32-bit response, CRC
       MMC IRQ 0080 (CMD 5): CTO
MMC1: Command timeout, CMD5
MMC1: Response 00000000
MMC1: End request, err 1
MMC: req done (05): 1: 00000000 00000000 00000000 00000000
MMC: starting cmd 05 arg 00000000 flags 00000009
MMC1: CMD5, argument 0x00000000, 32-bit response, CRC
       MMC IRQ 0080 (CMD 5): CTO
MMC1: Command timeout, CMD5
       MMC IRQ 0080 (CMD 5): CTO
MMC1: Command timeout, CMD5
MMC1: Response 00000000
MMC1: End request, err 1
MMC: req done (05): 1: 00000000 00000000 00000000 00000000
MMC: starting cmd 05 arg 00000000 flags 00000009
MMC1: CMD5, argument 0x00000000, 32-bit response, CRC
       MMC IRQ 0080 (CMD 5): CTO
MMC1: Command timeout, CMD5
MMC1: Response 00000000
MMC1: End request, err 1
MMC: req done (05): 1: 00000000 00000000 00000000 00000000
MMC: starting cmd 05 arg 00000000 flags 00000009
MMC1: CMD5, argument 0x00000000, 32-bit response, CRC
       MMC IRQ 0080 (CMD 5): CTO
MMC1: Command timeout, CMD5
MMC1: Response 00000000
MMC1: End request, err 1
MMC: req done (05): 1: 00000000 00000000 00000000 00000000
MMC1: set_ios: clock 0Hz busmode 1 powermode 0 Vdd 0.00
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