________________________________________ From: John Rigby [mailto:jcrigby@xxxxxxxxx] Sent: Sunday, October 18, 2009 7:24 PM To: Woodruff, Richard Cc: Dirk Behme; Chikkature Rajashekar, Madhusudhan; linux-mmc@xxxxxxxxxxxxxxx; linux-omap@xxxxxxxxxxxxxxx; Steve Sakoman Subject: Re: MMC_CAP_SDIO_IRQ for omap 3430 Ok I was going to ask where you found that but I just rechecked the TRM and there it is in plain site: When this bit is set to 1, the host controller automatically disables all the input buffers except the buffer of mmci_dat[1] outside of a transaction in order to detect asynchronous card interrupt on mmci_dat[1] line and minimize the leakage current of the buffers. In my defence, I did search the TRM for every occurance of dat1 but not dat[1]. Oh well live and learn and forget and repeat. John So, Does the SDIO card interrupt mode work fine now? Regards, Madhu On Sun, Oct 18, 2009 at 6:17 PM, John Rigby <jcrigby@xxxxxxxxx> wrote: > Richard, > > MMCHS_CON.CPTL = 1 < Don't disable input buffer on DAT1 after > completion to allow seeing SDIO interrupt> > > Sounds exactly like what we need. > > Thanks > John > > On Sun, Oct 18, 2009 at 5:12 PM, Woodruff, Richard <r-woodruff2@xxxxxx> wrote: >> >>> From: linux-omap-owner@xxxxxxxxxxxxxxx [mailto:linux-omap- >>> owner@xxxxxxxxxxxxxxx] On Behalf Of Dirk Behme >>> Sent: Sunday, October 18, 2009 11:45 AM >> >>> > It would be funny if the TRM was wrong and the CIRQ bit is really >>> > cleared by writing 1 to it. I'll try that. >> >> A while back I hunted down a few of the bits for this. Maybe this will help some. >> >> SYSCONFIG.ENAWAKEUP = 1 < allow ocp wrapper to generate an interrupt to prcm> >> MMCHS_HCTL.IWE = 1 < route wake up to module ocp wrapper> >> MMCHS_CON.CPTL = 1 < Don't disable input buffer on DAT1 after completion to allow seeing SDIO interrupt> >> MMCHS_HCTL.IWE >> MMCHS_ISE.CIRQ_ENABLE <bit to write to enable interrupt at pin> >> MMCHS_STAT<bit to write for clear of SDIO interrupt> >> CCCCR - IRQ_ENABLE (think host stack will do this) >> >> Regards, >> Richard W. >> > -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
