Hi Chaotian, On Tue, Mar 17, 2015 at 11:13:52AM +0800, Chaotian Jing wrote: > Add Mediatek MMC driver code > [...] > + host->dev = &pdev->dev; > + host->mmc = mmc; > + /* Set host parameters to mmc */ > + mmc->ops = &mt_msdc_ops; > + mmc->f_min = 260000; > + mmc->ocr_avail = MMC_VDD_30_31 | MMC_VDD_31_32 | MMC_VDD_32_33; > + > + mmc->caps |= MMC_CAP_ERASE | MMC_CAP_CMD23; > + /* MMC core transfer sizes tunable parameters */ > + mmc->max_segs = MAX_BD_NUM; > + mmc->max_seg_size = 64 * 1024; Earlier versions of this driver had 64 * 1024 - 512 here. Using 64k breaks SD card support here. Reading the partition table still works fine, but the next transfers fail with messages like: mtk-msdc 11240000.mmc: msdc_request_timeout: aborting cmd/data/mrq mtk-msdc 11240000.mmc: msdc_request_timeout: aborting mrq=ffffffc06e586860 cmd=18 mtk-msdc 11240000.mmc: msdc_request_timeout: abort data: cmd18; 136 blocks mmcblk1: error -110 transferring data, sector 338488, nr 136, cmd response 0x900, card status 0xb00 mtk-msdc 11240000.mmc: set mclk to 0 mmc1: tried to reset card Can you confirm this? Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
