RFC: PCI SD host controller driver & mmc/mmcsd modules improvements

[Oleksandr Tymoshenko]

Alexander Motin wrote:
> Hi.

> 
> Latest patches against 8-CURRENT (should also fit 7-STABLE) may be found 
> at:
> http://people.freebsd.org/~mav/sdhci/
     Thanks! That's just what I was looking for about three weeks ago :)
> 
> I will be grateful for any feedbacks, comments and support.
7.1 requires s/kproc/kthread/ but otherwise works fine:

sdhci0: <RICOH R5C822 SD> mem 0xff9fb800-0xff9fb8ff irq 9 at device 1.2 
on pci2
sdhci0: 1 slot(s) allocated
sdhci0: [ITHREAD]

mmc0: <MMC/SD bus> on sdhci0
mmc0: SD card: 507379712 bytes
mmcsd0: 483MB <MMC/SD Memory Card> (read-only) at mmc0
mmc0: setting transfer rate to 30.000MHz
mmc0: setting bus width to 4 bits
GEOM_LABEL: Label for provider mmcsd0s1 is msdosfs/SD.