mmc: core: UHS sdio card that fails should not exceed 50MHz

A UHS sdio card that fails initialization at 1.8v signaling is not in
UHS mode.  We cannot use the speed in the the cis to reflect the bus
speed as this is the maxiumum value and will not reflect the fact
that the host is operating at a lower (non uhs) bus speed.

Signed-off-by: Philip Rakity <prakity@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Reviewed-by: Aaron Lu <aaron.lu@amd.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index bd7bacc950dc03b386d2a6907aff047f870bc14d..12cde6ee17f50732ac5cd05f6843928abf87d0c9 100644 (file)
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -98,10 +98,11 @@ fail:
        return ret;
 }
 
-static int sdio_read_cccr(struct mmc_card *card)
+static int sdio_read_cccr(struct mmc_card *card, u32 ocr)
 {
        int ret;
        int cccr_vsn;
+       int uhs = ocr & R4_18V_PRESENT;
        unsigned char data;
        unsigned char speed;
 
@@ -149,7 +150,7 @@ static int sdio_read_cccr(struct mmc_card *card)
                card->scr.sda_spec3 = 0;
                card->sw_caps.sd3_bus_mode = 0;
                card->sw_caps.sd3_drv_type = 0;
-               if (cccr_vsn >= SDIO_CCCR_REV_3_00) {
+               if (cccr_vsn >= SDIO_CCCR_REV_3_00 && uhs) {
                        card->scr.sda_spec3 = 1;
                        ret = mmc_io_rw_direct(card, 0, 0,
                                SDIO_CCCR_UHS, 0, &data);
@@ -712,7 +713,7 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
        /*
         * Read the common registers.
         */
-       err = sdio_read_cccr(card);
+       err = sdio_read_cccr(card, ocr);
        if (err)
                goto remove;