SD: Unknown CMD52
Bug #622408 reported by
Loïc Minier
This bug affects 1 person
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| Linaro QEMU |
Fix Released
|
Wishlist
|
Peter Maydell | ||
Bug Description
Hi,
When booting the Ubuntu maverick daily preinstalled image for OMAP from the 18th of August under qemu-maemo 0.0~20100806+
SD: Unknown CMD52
It seems the SD card emulation doesn't support a command used in whatever linux mmc driver is used on OMAP.
This seems minor since the boot continues past these errors.
linux/include/
/* Application commands */
[...]
#define SD_APP_SEND_SCR 51 /* adtc R1 */
apparently SCR stands for SD Card Configuration Register.
Cheers,
| Changed in qemu-maemo: | |
| importance: | Undecided → Wishlist |
Revision history for this message
| Nicolas Pitre (npitre) wrote Re: [Bug 622408] [NEW] SD: Unknown CMD52 | #1 |
Revision history for this message
| Peter Maydell (pmaydell) wrote | #2 |
| affects: | qemu-maemo → qemu-linaro |
| Changed in qemu-linaro: | |
| assignee: | nobody → Peter Maydell (pmaydell) |
| status: | New → Fix Committed |
| Changed in qemu-linaro: | |
| status: | Fix Committed → Fix Released |
| milestone: | none → 2011.02-rc2 |
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On Sun, 22 Aug 2010, Loïc Minier wrote:
> When booting the Ubuntu maverick daily preinstalled image for OMAP from the 18th of August under qemu-maemo 0.0~20100806+
> SD: Unknown CMD52
CMD 52 is used for SDIO cards. And SDIO cards have to be probed before
standard SD cards. Non-SDIO cards are expected to return failure (or
timeout) for CMD 52. So if qemu doesn't emulate SDIO cards, it may
silently ignore those commands.