On Tuesday 27 January 2015 10:17:39 Pali Rohár wrote: > On Tuesday 27 January 2015 00:21:04 Aaro Koskinen wrote: > > Hi, > > > > On Mon, Jan 26, 2015 at 10:04:59PM +0100, Pali Rohár wrote: > > > problem? Why any of these two patches fix problem when mmc > > > is not detected by kernel in qemu (machine n900)? > > > Detection of mmc fails because function > > > mmc_send_op_cond() without one of above patches fails. > > > > Has it ever worked? It could be just that QEMU's emulation > > is broken. Since the kernel works on actual HW, you > > probably should contact QEMU maintainers. > > > > I don't see n900 in Debian's QEMU. There's n800 and n810 but > > I couldn't boot any of my kernels with those... > > > > A. > > It worked with stock Nokia kernel (2.6.28). > > N900 qemu support is not in upstream qemu project, but in > linaro qemu version. You can find it e.g. in ubuntu: > http://packages.ubuntu.com/source/precise-updates/qemu-linaro
Here is another alternative patch which enable internal eMMC
support in qemu n900:
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 9584bff..225df49 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -2330,13 +2330,13 @@ static int mmc_rescan_try_freq(struct
mmc_host *host, unsigned freq)
sdio_reset(host);
mmc_go_idle(host);
- mmc_send_if_cond(host, host->ocr_avail);
-
- /* Order's important: probe SDIO, then SD, then MMC */
- if (!mmc_attach_sdio(host))
- return 0;
- if (!mmc_attach_sd(host))
- return 0;
+// mmc_send_if_cond(host, host->ocr_avail);
+//
+// /* Order's important: probe SDIO, then SD, then MMC */
+// if (!mmc_attach_sdio(host))
+// return 0;
+// if (!mmc_attach_sd(host))
+// return 0;
if (!mmc_attach_mmc(host))
return 0;
It just disable SDIO and SD code. It looks like using some SDIO
or SD commands on mmc controller in qemu cause problems...
Any idea?
--
Pali Rohár
[email protected]
signature.asc
Description: This is a digitally signed message part.
