/*
* Resume callback from host.
*
* This function tries to determine if the same card is still present
* and, if so, restore all state to it.
*/
static int mmc_resume(struct mmc_host *host)
{
int err;
BUG_ON(!host);
BUG_ON(!host->card);
mmc_claim_host(host);
if (mmc_card_is_sleep(host->card)) {
err = mmc_card_awake(host);
mmc_card_clr_sleep(host->card);
} else
err = mmc_init_card(host, host->ocr, host->card);
mmc_release_host(host);
return err;
}
/* Handler for [SLEEP -> ENABLED] transition */
static int omap_hsmmc_sleep_to_enabled(struct omap_hsmmc_host *host)
{
if (!mmc_try_claim_host(host->mmc))
return 0;
clk_enable(host->fclk);
omap_hsmmc_context_restore(host);
if (mmc_slot(host).set_sleep)
mmc_slot(host).set_sleep(host->dev, host->slot_id, 0,
host->vdd, host->dpm_state == CARDSLEEP);
if (mmc_card_can_sleep(host->mmc))
mmc_card_awake(host->mmc);
dev_dbg(mmc_dev(host->mmc), "%s -> ENABLED\n",
host->dpm_state == CARDSLEEP ? "CARDSLEEP" : "REGSLEEP");
host->dpm_state = ENABLED;
mmc_release_host(host->mmc);
return 0;
}
/* Routine to resume the MMC device */
static int omap_mmc_resume(struct platform_device *pdev)
{
int ret = 0;
struct mmc_omap_host *host = platform_get_drvdata(pdev);
if (host && !host->suspended){
if (host->card_sleep){/*mmc is sleeping but mmc regulator power on*/
if (mmc_card_can_sleep(host->mmc))
mmc_card_awake(host->mmc);
host->card_sleep = 0;
}
return 0;
}
if (host) {
if (host->card_sleep){
host->card_sleep = 0;
}
if (host->pdata->resume) {
ret = host->pdata->resume(&pdev->dev, host->slot_id);
if (ret)
dev_dbg(mmc_dev(host->mmc),
"Unmask interrupt failed\n");
}
/* Notify the core to resume the host */
ret = mmc_resume_host(host->mmc);
if (ret == 0)
host->suspended = 0;
}
return ret;
}