Hi all, We are porting existing OMAP HSMMC driver (omap_hsmmc.c) to an upcoming SOC. When testing the driver with SanDisk 16GB SDHC Card (SanDisk Extreme HD Video 16GB 20Mb/s), we observed that the card doesn't switch to High Speed mode. The card shows that it is compatible with SDA spec3. We are testing on Linux v3.1-rc8 In mmc_sd_init_card(), rocr received from card is 0xc0ff8000, (S18A bit not set). During mmc_sd_setup_card() --> mmc_decode_scr(), when decoding scr, the card specifies that it is sda spec3 compatible if (scr->sda_vsn == SCR_SPEC_VER_2) /* Check if Physical Layer Spec v3.0 is supported */ scr->sda_spec3 = UNSTUFF_BITS(resp, 47, 1); --> true Then during mmc_read_switch(), since it's a sda spec3 card, the code goes to read sd3_drv_type & sd3_curr_limit and skips settings hs_max_dtr. mmc_sd_switch_hs() returns back since hs_max_dtr == 0 if (card->sw_caps.hs_max_dtr == 0) return 0; Because of this Card isn't switched to High Speed mode. Is there any solution for this? Has anyone seen this issue. Thanks in advance. I am also attaching the log I get from the sd dev attr Regards Gururaja root@arago-armv7:/sys/devices/platform/omap/omap_hsmmc.0/mmc_host/mmc0/mmc0:aaaa# cat cid 0353445344313647800c03994400ac6f root@arago-armv7:/sys/devices/platform/omap/omap_hsmmc.0/mmc_host/mmc0/mmc0:aaaa# cat csd 400e00325b59000076b27f800a404013 root@arago-armv7:/sys/devices/platform/omap/omap_hsmmc.0/mmc_host/mmc0/mmc0:aaaa# cat date 12/2010 root@arago-armv7:/sys/devices/platform/omap/omap_hsmmc.0/mmc_host/mmc0/mmc0:aaaa# cat erase_size 512 root@arago-armv7:/sys/devices/platform/omap/omap_hsmmc.0/mmc_host/mmc0/mmc0:aaaa# cat fwrev 0x0 root@arago-armv7:/sys/devices/platform/omap/omap_hsmmc.0/mmc_host/mmc0/mmc0:aaaa# cat hwrev 0x8 root@arago-armv7:/sys/devices/platform/omap/omap_hsmmc.0/mmc_host/mmc0/mmc0:aaaa# cat name SD16G root@arago-armv7:/sys/devices/platform/omap/omap_hsmmc.0/mmc_host/mmc0/mmc0:aaaa# cat manfid 0x000003 root@arago-armv7:/sys/devices/platform/omap/omap_hsmmc.0/mmc_host/mmc0/mmc0:aaaa# cat oemid 0x5344 root@arago-armv7:/sys/devices/platform/omap/omap_hsmmc.0/mmc_host/mmc0/mmc0:aaaa# cat preferred_erase_size 4194304 root@arago-armv7:/sys/devices/platform/omap/omap_hsmmc.0/mmc_host/mmc0/mmc0:aaaa# cat scr 0235800000000000 root@arago-armv7:/sys/devices/platform/omap/omap_hsmmc.0/mmc_host/mmc0/mmc0:aaaa# cat serial 0x0c039944 root@arago-armv7:/sys/devices/platform/omap/omap_hsmmc.0/mmc_host/mmc0/mmc0:aaaa# cat type SD root@arago-armv7:/sys/devices/platform/omap/omap_hsmmc.0/mmc_host/mmc0/mmc0:aaaa# cat uevent DRIVER=mmcblk MMC_TYPE=SD MMC_NAME=SD16G MODALIAS=mmc:block -- 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
