dm: sata: Update the AHCI uclass to support operations

At present the AHCI uclass is just a shell and we still use the global
functions to access SATA. Fix this by adding operations to the uclass.

Signed-off-by: Simon Glass <sjg@chromium.org>

drivers/ata/sata.c

@@ -11,17 +11,52 @@
  */
 
 #include <common.h>
+#include <ahci.h>
 #include <dm.h>
 #include <sata.h>
 
+#ifndef CONFIG_AHCI
 struct blk_desc sata_dev_desc[CONFIG_SYS_SATA_MAX_DEVICE];
+#endif
+
+int sata_reset(struct udevice *dev)
+{
+	struct ahci_ops *ops = ahci_get_ops(dev);
+
+	if (!ops->reset)
+		return -ENOSYS;
+
+	return ops->reset(dev);
+}
+
+int sata_dm_port_status(struct udevice *dev, int port)
+{
+	struct ahci_ops *ops = ahci_get_ops(dev);
+
+	if (!ops->port_status)
+		return -ENOSYS;
 
+	return ops->port_status(dev, port);
+}
+
+int sata_scan(struct udevice *dev)
+{
+	struct ahci_ops *ops = ahci_get_ops(dev);
+
+	if (!ops->scan)
+		return -ENOSYS;
+
+	return ops->scan(dev);
+}
+
+#ifndef CONFIG_AHCI
 #ifdef CONFIG_PARTITIONS
 struct blk_desc *sata_get_dev(int dev)
 {
 	return (dev < CONFIG_SYS_SATA_MAX_DEVICE) ? &sata_dev_desc[dev] : NULL;
 }
 #endif
+#endif
 
 #ifdef CONFIG_BLK
 static unsigned long sata_bread(struct udevice *dev, lbaint_t start,
@@ -49,6 +84,7 @@ static unsigned long sata_bwrite(struct blk_desc *block_dev, lbaint_t start,
 }
 #endif
 
+#ifndef CONFIG_AHCI
 int __sata_initialize(void)
 {
 	int rc, ret = -1;
@@ -95,6 +131,7 @@ __weak int __sata_stop(void)
 	return err;
 }
 int sata_stop(void) __attribute__((weak, alias("__sata_stop")));
+#endif
 
 #ifdef CONFIG_BLK
 static const struct blk_ops sata_blk_ops = {

include/ahci.h

@@ -176,6 +176,60 @@ struct ahci_uc_priv {
 	u32	link_port_map; /*linkup port map*/
 };
 
+struct ahci_ops {
+	/**
+	 * reset() - reset the controller
+	 *
+	 * @dev:	Controller to reset
+	 * @return 0 if OK, -ve on error
+	 */
+	int (*reset)(struct udevice *dev);
+
+	/**
+	 * port_status() - get the status of a SATA port
+	 *
+	 * @dev:	Controller to reset
+	 * @port:	Port number to check (0 for first)
+	 * @return 0 if detected, -ENXIO if nothing on port, other -ve on error
+	 */
+	int (*port_status)(struct udevice *dev, int port);
+
+	/**
+	 * scan() - scan SATA ports
+	 *
+	 * @dev:	Controller to scan
+	 * @return 0 if OK, -ve on error
+	 */
+	int (*scan)(struct udevice *dev);
+};
+
+#define ahci_get_ops(dev)        ((struct ahci_ops *)(dev)->driver->ops)
+
+/**
+ * sata_reset() - reset the controller
+ *
+ * @dev:	Controller to reset
+ * @return 0 if OK, -ve on error
+ */
+int sata_reset(struct udevice *dev);
+
+/**
+ * sata_port_status() - get the status of a SATA port
+ *
+ * @dev:	Controller to reset
+ * @port:	Port number to check (0 for first)
+ * @return 0 if detected, -ENXIO if nothin on port, other -ve on error
+ */
+int sata_dm_port_status(struct udevice *dev, int port);
+
+/**
+ * sata_scan() - scan SATA ports
+ *
+ * @dev:	Controller to scan
+ * @return 0 if OK, -ve on error
+ */
+int sata_scan(struct udevice *dev);
+
 int ahci_init(void __iomem *base);
 int ahci_reset(void __iomem *base);