static void mmc_omap_release_slot(struct mmc_omap_slot *slot, int clk_enabled) { struct mmc_omap_host *host = slot->host; unsigned long flags; int i; BUG_ON(slot == NULL || host->mmc == NULL); if (clk_enabled) /* Keeps clock running for at least 8 cycles on valid freq */ mod_timer(&host->clk_timer, jiffies + HZ/10); else { del_timer(&host->clk_timer); mmc_omap_fclk_offdelay(slot); mmc_omap_fclk_enable(host, 0); } 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; if (host->slots[i] == NULL || host->slots[i]->mrq == NULL) continue; BUG_ON(host->next_slot != NULL); new_slot = host->slots[i]; /* The current slot should not have a request in queue */ BUG_ON(new_slot == host->current_slot); host->next_slot = new_slot; host->mmc = new_slot->mmc; spin_unlock_irqrestore(&host->slot_lock, flags); schedule_work(&host->slot_release_work); return; } host->mmc = NULL; wake_up(&host->slot_wq); spin_unlock_irqrestore(&host->slot_lock, flags); }
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: del_timer(&host->clk_timer); if (host->current_slot != slot || !claimed) mmc_omap_fclk_offdelay(host->current_slot); if (host->current_slot != slot) { OMAP_MMC_WRITE(host, CON, slot->saved_con & 0xFC00); if (host->pdata->switch_slot != NULL) host->pdata->switch_slot(mmc_dev(slot->mmc), slot->id); host->current_slot = slot; } if (claimed) { mmc_omap_fclk_enable(host, 1); /* 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); } else mmc_omap_fclk_enable(host, 0); }
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: del_timer(&host->clk_timer); if (host->current_slot != slot || !claimed) mmc_omap_fclk_offdelay(host->current_slot); if (host->current_slot != slot) { OMAP_MMC_WRITE(host, CON, slot->saved_con & 0xFC00); if (host->pdata->switch_slot != NULL) host->pdata->switch_slot(mmc_dev(slot->mmc), slot->id); host->current_slot = slot; } if (claimed) { mmc_omap_fclk_enable(host, 1); OMAP_MMC_READ(host, CON); OMAP_MMC_WRITE(host, CON, slot->saved_con); } else mmc_omap_fclk_enable(host, 0); }