2013/2/28 Kevin Liu <kliu5@xxxxxxxxxxx>:
> 1. If quirk SDHCI_QUIRK_BROKEN_CARD_DETECTION is selected, there is no
> card detection available and polling must be used. Gpio detect must
> _not_ be supported under this case.
> Change the sequence to check SDHCI_QUIRK_BROKEN_CARD_DETECTION first,
> which make code more clear.
> 2. nonremovable card should be also assumed always present.
>
> Signed-off-by: Kevin Liu <kliu5@xxxxxxxxxxx>
> ---
> drivers/mmc/host/sdhci.c | 27 ++++++++++++++-------------
> 1 file changed, 14 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> index c94fd6c..c0c48dd 100644
> --- a/drivers/mmc/host/sdhci.c
> +++ b/drivers/mmc/host/sdhci.c
> @@ -1337,19 +1337,20 @@ static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
>
> host->mrq = mrq;
>
> - /*
> - * Firstly check card presence from cd-gpio. The return could
> - * be one of the following possibilities:
> - * negative: cd-gpio is not available
> - * zero: cd-gpio is used, and card is removed
> - * one: cd-gpio is used, and card is present
> - */
> - present = mmc_gpio_get_cd(host->mmc);
> - if (present < 0) {
> - /* If polling, assume that the card is always present. */
> - if (host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION)
> - present = 1;
> - else
> + /* If polling/nonremovable, assume that the card is always present. */
> + if ((host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) ||
> + (host->mmc->caps & MMC_CAP_NONREMOVABLE)) {
> + present = 1;
> + } else {
> + /*
> + * Firstly check card presence from cd-gpio. The return could
> + * be one of the following possibilities:
> + * negative: cd-gpio is not available
> + * zero: cd-gpio is used, and card is removed
> + * one: cd-gpio is used, and card is present
> + */
> + present = mmc_gpio_get_cd(host->mmc);
> + if (IS_ERR_VALUE(present))
> present = sdhci_readl(host, SDHCI_PRESENT_STATE) &
> SDHCI_CARD_PRESENT;
> }
I submitted below patch to replace this one so please ignore this patch.
[PATCH v2] mmc: sdhci: update check code for cd-broken or nonremovable card
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