+#ifdef CONFIG_PM
+
+/*
+ * Restore the MMC host context, if it was lost as result of a
+ * power state change.
+ */
+static int omap_mmc_restore_ctx(struct mmc_omap_host *host)
+{
+ struct mmc_ios *ios = &host->mmc->ios;
+ struct omap_mmc_platform_data *pdata = host->pdata;
+ int context_loss = 0;
+ u32 hctl, capa, con;
+ u16 dsor = 0;
+ unsigned long timeout;
+
+ if (pdata->get_context_loss_count) {
+ context_loss = pdata->get_context_loss_count(host->dev);
+ if (context_loss < 0)
+ return 1;
+ }
+
+ dev_dbg(mmc_dev(host->mmc), "context was %slost\n",
+ context_loss == host->context_loss ? "not " : "");
+ if (host->context_loss == context_loss)
+ return 1;
+
+ /* Wait for hardware reset */
+ timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS);
+ while ((OMAP_HSMMC_READ(host->base, SYSSTATUS) & RESETDONE) != RESETDONE
+ && time_before(jiffies, timeout))
+ ;
+
+ /* Do software reset */
+ OMAP_HSMMC_WRITE(host->base, SYSCONFIG, SOFTRESET);
+ timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS);
+ while ((OMAP_HSMMC_READ(host->base, SYSSTATUS) & RESETDONE) != RESETDONE
+ && time_before(jiffies, timeout))
+ ;
+
+ OMAP_HSMMC_WRITE(host->base, SYSCONFIG,
+ OMAP_HSMMC_READ(host->base, SYSCONFIG) | AUTOIDLE);
+
+ if (host->id == OMAP_MMC1_DEVID) {
+ if (host->power_mode != MMC_POWER_OFF &&
+ (1 << ios->vdd) <= MMC_VDD_23_24)
+ hctl = SDVS18;
+ else
+ hctl = SDVS30;
+ capa = VS30 | VS18;
+ } else {
+ hctl = SDVS18;
+ capa = VS18;
+ }
+
+ OMAP_HSMMC_WRITE(host->base, HCTL,
+ OMAP_HSMMC_READ(host->base, HCTL) | hctl);
+
+ OMAP_HSMMC_WRITE(host->base, CAPA,
+ OMAP_HSMMC_READ(host->base, CAPA) | capa);
+
+ OMAP_HSMMC_WRITE(host->base, HCTL,
+ OMAP_HSMMC_READ(host->base, HCTL) | SDBP);
+
+ timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS);
+ while ((OMAP_HSMMC_READ(host->base, HCTL) & SDBP) != SDBP
+ && time_before(jiffies, timeout))
+ ;
+
+ OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR);
+ OMAP_HSMMC_WRITE(host->base, ISE, INT_EN_MASK);
+ OMAP_HSMMC_WRITE(host->base, IE, INT_EN_MASK);
+
+ /* Do not initialize card-specific things if the power is off */
+ if (host->power_mode == MMC_POWER_OFF)
+ goto out;
+
+ con = OMAP_HSMMC_READ(host->base, CON);
+ switch (ios->bus_width) {
+ case MMC_BUS_WIDTH_8:
+ OMAP_HSMMC_WRITE(host->base, CON, con | DW8);
+ break;
+ case MMC_BUS_WIDTH_4:
+ OMAP_HSMMC_WRITE(host->base, CON, con & ~DW8);
+ OMAP_HSMMC_WRITE(host->base, HCTL,
+ OMAP_HSMMC_READ(host->base, HCTL) | FOUR_BIT);
+ break;
+ case MMC_BUS_WIDTH_1:
+ OMAP_HSMMC_WRITE(host->base, CON, con & ~DW8);
+ OMAP_HSMMC_WRITE(host->base, HCTL,
+ OMAP_HSMMC_READ(host->base, HCTL) & ~FOUR_BIT);
+ break;
+ }
+
+ if (ios->clock) {
+ dsor = OMAP_MMC_MASTER_CLOCK / ios->clock;
+ if (dsor < 1)
+ dsor = 1;
+
+ if (OMAP_MMC_MASTER_CLOCK / dsor > ios->clock)
+ dsor++;
+
+ if (dsor > 250)
+ dsor = 250;
+ }
+
+ OMAP_HSMMC_WRITE(host->base, SYSCTL,
+ OMAP_HSMMC_READ(host->base, SYSCTL) & ~CEN);
+ OMAP_HSMMC_WRITE(host->base, SYSCTL, (dsor << 6) | (DTO << 16));
+ OMAP_HSMMC_WRITE(host->base, SYSCTL,
+ OMAP_HSMMC_READ(host->base, SYSCTL) | ICE);
+
+ timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS);
+ while ((OMAP_HSMMC_READ(host->base, SYSCTL) & ICS) != ICS
+ && time_before(jiffies, timeout))
+ ;
+
+ OMAP_HSMMC_WRITE(host->base, SYSCTL,
+ OMAP_HSMMC_READ(host->base, SYSCTL) | CEN);
+
+ con = OMAP_HSMMC_READ(host->base, CON);
+ if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN)
+ OMAP_HSMMC_WRITE(host->base, CON, con | OD);
+ else
+ OMAP_HSMMC_WRITE(host->base, CON, con & ~OD);
+out:
+ host->context_loss = context_loss;
+
+ dev_dbg(mmc_dev(host->mmc), "context is restored\n");
+ return 0;
+}
+
+/*
+ * Save the MMC host context (store the number of power state changes so far).
+ */
+static void omap_mmc_save_ctx(struct mmc_omap_host *host)
+{
+ struct omap_mmc_platform_data *pdata = host->pdata;
+ int context_loss;
+
+ if (pdata->get_context_loss_count) {
+ context_loss = pdata->get_context_loss_count(host->dev);
+ if (context_loss < 0)
+ return;
+ host->context_loss = context_loss;
+ }
+}
+
+#else
+
+static int omap_mmc_restore_ctx(struct mmc_omap_host *host)
+{
+ return 0;
+}
+
+static void omap_mmc_save_ctx(struct mmc_omap_host *host)
+{
+}
+
+#endif
+