+static void mmc_omap_select_slot(struct mmc_omap_slot *slot, int claimed)
+{
+ struct mmc_omap_host *host = slot->host;
+ unsigned long flags;
+
+ if (claimed)
+ goto no_claim;
+ spin_lock_irqsave(&host->slot_lock, flags);
+ while (host->mmc != NULL) {
+ spin_unlock_irqrestore(&host->slot_lock, flags);
+ wait_event(host->slot_wq, host->mmc == NULL);
+ spin_lock_irqsave(&host->slot_lock, flags);
+ }
+ host->mmc = slot->mmc;
+ spin_unlock_irqrestore(&host->slot_lock, flags);
+no_claim:
+ clk_enable(host->fclk);
+ if (host->current_slot != slot) {
+ if (host->pdata->switch_slot != NULL)
+ host->pdata->switch_slot(mmc_dev(slot->mmc), slot->id);
+ host->current_slot = slot;
+ }
+
+ /* Doing the dummy read here seems to work around some bug
+ * at least in OMAP24xx silicon where the command would not
+ * start after writing the CMD register. Sigh. */
+ OMAP_MMC_READ(host, CON);
+
+ OMAP_MMC_WRITE(host, CON, slot->saved_con);
+}
+
+static void mmc_omap_start_request(struct mmc_omap_host *host,
+ struct mmc_request *req);
+
+static void mmc_omap_release_slot(struct mmc_omap_slot *slot)
+{
+ struct mmc_omap_host *host = slot->host;
+ unsigned long flags;
+ int i;
+
+ BUG_ON(slot == NULL || host->mmc == NULL);
+ clk_disable(host->fclk);
+
+ spin_lock_irqsave(&host->slot_lock, flags);
+ /* Check for any pending requests */
+ for (i = 0; i < host->nr_slots; i++) {
+ struct mmc_omap_slot *new_slot;
+ struct mmc_request *rq;
+
+ if (host->slots[i] == NULL || host->slots[i]->mrq == NULL)
+ continue;
+
+ new_slot = host->slots[i];
+ /* The current slot should not have a request in queue */
+ BUG_ON(new_slot == host->current_slot);
+
+ host->mmc = new_slot->mmc;
+ spin_unlock_irqrestore(&host->slot_lock, flags);
+ mmc_omap_select_slot(new_slot, 1);
+ rq = new_slot->mrq;
+ new_slot->mrq = NULL;
+ mmc_omap_start_request(host, rq);
+ return;
+ }
+
+ host->mmc = NULL;
+ wake_up(&host->slot_wq);
+ spin_unlock_irqrestore(&host->slot_lock, flags);
+}
+
+/* Access to the R/O switch is required for production testing
+ * purposes. */
+static ssize_t
+mmc_omap_show_ro(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct mmc_host *mmc = container_of(dev, struct mmc_host, class_dev);
+ struct mmc_omap_slot *slot = mmc_priv(mmc);
+
+ return sprintf(buf, "%d\n", slot->pdata->get_ro(mmc_dev(mmc),
+ slot->id));
+}
+
+static DEVICE_ATTR(ro, S_IRUGO, mmc_omap_show_ro, NULL);
+
+static ssize_t
+mmc_omap_show_slot_name(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct mmc_host *mmc = container_of(dev, struct mmc_host, class_dev);
+ struct mmc_omap_slot *slot = mmc_priv(mmc);
+
+ return sprintf(buf, "%s\n", slot->pdata->name);
+}
+
+static DEVICE_ATTR(slot_name, S_IRUGO, mmc_omap_show_slot_name, NULL);
+