mmc: dw_mmc: add support tuning scheme

[karo-tx-linux.git] / drivers / mmc / host / dw_mmc.h

diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h
index 81b29941c5b9b1ddaff3f313cab7bab9c57c6e46..b281fdc6835f40738c70811c1a9f9fe86de38f44 100644 (file)
--- a/drivers/mmc/host/dw_mmc.h
+++ b/drivers/mmc/host/dw_mmc.h
@@ -183,6 +183,52 @@ extern int dw_mci_suspend(struct dw_mci *host);
 extern int dw_mci_resume(struct dw_mci *host);
 #endif
 
+/**
+ * struct dw_mci_slot - MMC slot state
+ * @mmc: The mmc_host representing this slot.
+ * @host: The MMC controller this slot is using.
+ * @quirks: Slot-level quirks (DW_MCI_SLOT_QUIRK_XXX)
+ * @wp_gpio: If gpio_is_valid() we'll use this to read write protect.
+ * @ctype: Card type for this slot.
+ * @mrq: mmc_request currently being processed or waiting to be
+ *     processed, or NULL when the slot is idle.
+ * @queue_node: List node for placing this node in the @queue list of
+ *     &struct dw_mci.
+ * @clock: Clock rate configured by set_ios(). Protected by host->lock.
+ * @__clk_old: The last updated clock with reflecting clock divider.
+ *     Keeping track of this helps us to avoid spamming the console
+ *     with CONFIG_MMC_CLKGATE.
+ * @flags: Random state bits associated with the slot.
+ * @id: Number of this slot.
+ * @last_detect_state: Most recently observed card detect state.
+ */
+struct dw_mci_slot {
+       struct mmc_host         *mmc;
+       struct dw_mci           *host;
+
+       int                     quirks;
+       int                     wp_gpio;
+
+       u32                     ctype;
+
+       struct mmc_request      *mrq;
+       struct list_head        queue_node;
+
+       unsigned int            clock;
+       unsigned int            __clk_old;
+
+       unsigned long           flags;
+#define DW_MMC_CARD_PRESENT    0
+#define DW_MMC_CARD_NEED_INIT  1
+       int                     id;
+       int                     last_detect_state;
+};
+
+struct dw_mci_tuning_data {
+       const u8 *blk_pattern;
+       unsigned int blksz;
+};
+
 /**
  * dw_mci driver data - dw-mshc implementation specific driver data.
  * @caps: mmc subsystem specified capabilities of the controller(s).
@@ -203,5 +249,7 @@ struct dw_mci_drv_data {
        void            (*prepare_command)(struct dw_mci *host, u32 *cmdr);
        void            (*set_ios)(struct dw_mci *host, struct mmc_ios *ios);
        int             (*parse_dt)(struct dw_mci *host);
+       int             (*execute_tuning)(struct dw_mci_slot *slot, u32 opcode,
+                                       struct dw_mci_tuning_data *tuning_data);
 };
 #endif /* _DW_MMC_H_ */