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mmc: core: Add helper function for EXT_CSD support
The helper function mmc_can_ext_csd() will return a positive value if the card supports the EXT_CSD register. Start using it at relavant places in the mmc core. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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@ -190,7 +190,7 @@ static int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd)
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*new_ext_csd = NULL;
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if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
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if (!mmc_can_ext_csd(card))
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return 0;
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/*
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@ -852,7 +852,7 @@ static int mmc_select_powerclass(struct mmc_card *card)
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int err, ddr;
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/* Power class selection is supported for versions >= 4.0 */
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if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
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if (!mmc_can_ext_csd(card))
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return 0;
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bus_width = host->ios.bus_width;
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@ -913,7 +913,7 @@ static int mmc_select_bus_width(struct mmc_card *card)
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unsigned idx, bus_width = 0;
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int err = 0;
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if ((card->csd.mmca_vsn < CSD_SPEC_VER_4) &&
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if (!mmc_can_ext_csd(card) &&
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!(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)))
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return 0;
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@ -1154,7 +1154,7 @@ static int mmc_select_timing(struct mmc_card *card)
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{
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int err = 0;
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if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
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if (!mmc_can_ext_csd(card))
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goto bus_speed;
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if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200)
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@ -675,3 +675,8 @@ int mmc_send_hpi_cmd(struct mmc_card *card, u32 *status)
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return 0;
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}
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int mmc_can_ext_csd(struct mmc_card *card)
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{
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return (card && card->csd.mmca_vsn > CSD_SPEC_VER_3);
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}
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@ -26,6 +26,7 @@ int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp);
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int mmc_spi_set_crc(struct mmc_host *host, int use_crc);
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int mmc_bus_test(struct mmc_card *card, u8 bus_width);
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int mmc_send_hpi_cmd(struct mmc_card *card, u32 *status);
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int mmc_can_ext_csd(struct mmc_card *card);
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#endif
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