SDHCI: Add struct sdhci_hardware to describe system to hardware

Add a struct sdhci_hardware to describe the specific controls to
the hardware the SDHCI controller is in, such as a PCI or generic
bus system.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>

Index: linux-2.6.22-rc4-mmc1/drivers/mmc/host/sdhci.h
===================================================================
--- linux-2.6.22-rc4-mmc1.orig/drivers/mmc/host/sdhci.h	2007-06-10 12:34:23.000000000 +0100
+++ linux-2.6.22-rc4-mmc1/drivers/mmc/host/sdhci.h	2007-06-10 12:37:57.000000000 +0100
@@ -162,6 +162,7 @@
 #define  SDHCI_SPEC_VER_SHIFT	0
 
 struct sdhci_chip;
+struct sdhci_hardwre;
 
 struct sdhci_host {
 	struct sdhci_chip	*chip;
@@ -208,3 +209,26 @@ struct sdhci_chip {
 	int			num_slots;	/* Slots on controller */
 	struct sdhci_host	*hosts[0];	/* Pointers to hosts */
 };
+
+/* controller structure for defining the interface specific functions
+ * that the core needs to know about the hardware.
+*/
+
+struct sdhci_hardware {
+	unsigned int	(*update_caps)(struct sdhci_host *host, unsigned int);
+
+	unsigned int	(*get_quirks)(struct sdhci_host *host);
+	unsigned long	(*get_max_clk)(struct sdhci_host *host);
+	unsigned long	(*get_timeout_clk)(struct sdhci_host *host);
+
+	int		(*set_clock)(struct sdhci_host *host,
+				     unsigned int clock);
+
+	void		(*set_dma)(struct sdhci_host *host, int use_dma);
+
+	unsigned long	(*map_sg)(struct sdhci_host *host,
+				  struct mmc_data *data);
+
+	void		(*unmap_sg)(struct sdhci_host *host,
+				    struct mmc_data *data);
+};