+Wolfram, Simon Looping maintainers of TMIO/SDHI. On 29 November 2016 at 07:23, Yasushi SHOJI <yashi@xxxxxxxxxxxxxxxxx> wrote: > Hello, > > We've been using tmio_mmc_pio.c and seeing the following message: > > "sh_mobile_sdhi sh_mobile_sdhi.1: timeout waiting for SD bus idle" > > While searching for a fix, we found some code we don't understand. > I'm sending this question with a hope that someone would enlighten us a > bit. So, here goes. > > The SDIO spec. seems to allow sending SDIO IRQ between the blocks of > multi-block transfer. The hardware, SCLKDIVEN bit of SD_INFO02, is > set to zero (0) and prohibits to access IOMOD bit of SDIO_MODE > register while multi-block transfer is going. > > The current code, however, tries to disable SDIO IRQ by setting IOMOD > to zero in tmio_mmc_enable_sdio_irq() all the time, even during > multi-block transfer. This prints the above waring. What we don't > understand is that the code does both masking and disabling the IRQ. > > So my question is that "What is the reason behind to disable IRQ with > SDIO_MODE? Is there any situation which masking with SDIO_INFO1_MASK > is not enough? > > Thanks you, > -- > yashi > -- Kind regards Uffe -- 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
