Hi all,
We are using a Freescale i.MX233 and are running on mainline Linux.
A wifi chip company (Redpine Signals) is doing a port of their sdio driver for their Wifi module for our platform. But they are running into problems with the sdio.
We have tested the mxs-mmc port using normal sd card which is working, but now with sdio we keep on getting these error messages in our serial console:
[ 45.180000] mmc0: new high speed SDIO card at address fffd
[ 46.200000] mmc0: card fffd removed
[ 46.370000] mmc0: new high speed SDIO card at address fffd
[ 47.390000] mmc0: card fffd removed
[ 47.560000] mmc0: new high speed SDIO card at address fffd
[ 48.580000] mmc0: card fffd removed
[ 48.750000] mmc0: new high speed SDIO card at address fffd
[ 49.770000] mmc0: card fffd
These are printed in drivers/mmc/core/bus.c:
void mmc_remove_card(struct mmc_card *card)
{
#ifdef CONFIG_DEBUG_FS
mmc_remove_card_debugfs(card);
#endif
if (mmc_card_present(card)) {
if (mmc_host_is_spi(card->host)) {
printk(KERN_INFO "%s: SPI card removed\n",
mmc_hostname(card->host));
} else {
printk(KERN_INFO "%s: card %04x removed\n",
mmc_hostname(card->host), card->rca);
}
device_del(&card->dev);
}
put_device(&card->dev);
}
This function is being invoked from mmc.c file from mmc_attach_mmc() in failure cases (label remove_card).
Normal SD cards are working, but the sdio seems to be causing issues.
Is this a known problem?
We have tested this since linux 2.6.39-rc5 and now on mainline things are still the same.
Any idea on where to look for a solution?
Might this have something to do with a timeout which is triggering this?
Thanks
Koen Beel
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