From 745a94f352b8f6f05e038110d3ce44d211bf31f3 Mon Sep 17 00:00:00 2001
From: Simon Glass <sjg@chromium.org>
Date: Tue, 4 Jul 2017 13:31:18 -0600
Subject: ahci: Support non-PCI controllers

At present the AHCI SCSI driver only supports PCI with driver model.
Rename the existing function to indicate this and add support for adding
a non-PCI controller .

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

diff --git a/arch/x86/cpu/ivybridge/sata.c b/arch/x86/cpu/ivybridge/sata.c
index 462b7c0..7febb8c 100644
--- a/arch/x86/cpu/ivybridge/sata.c
+++ b/arch/x86/cpu/ivybridge/sata.c
@@ -236,7 +236,7 @@ static int bd82x6x_sata_probe(struct udevice *dev)
 		bd82x6x_sata_enable(dev);
 	else {
 		bd82x6x_sata_init(dev, pch);
-		ret = ahci_probe_scsi(dev);
+		ret = ahci_probe_scsi_pci(dev);
 		if (ret)
 			return ret;
 	}
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 606347f..7c56f57 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -431,7 +431,7 @@ static void ahci_print_info(struct ahci_uc_priv *uc_priv)
 	       cap2 & (1 << 0) ? "boh " : "");
 }
 
-#ifndef CONFIG_SCSI_AHCI_PLAT
+#if defined(CONFIG_DM_SCSI) || !defined(CONFIG_SCSI_AHCI_PLAT)
 # if defined(CONFIG_DM_PCI) || defined(CONFIG_DM_SCSI)
 static int ahci_init_one(struct ahci_uc_priv *uc_priv, struct udevice *dev)
 # else
@@ -1158,11 +1158,8 @@ int ahci_bind_scsi(struct udevice *ahci_dev, struct udevice **devp)
 	return 0;
 }
 
-int ahci_probe_scsi(struct udevice *ahci_dev)
+int ahci_probe_scsi(struct udevice *ahci_dev, ulong base)
 {
-#ifdef CONFIG_SCSI_AHCI_PLAT
-	return -ENOSYS;  /* TODO(sjg@chromium.org): Support non-PCI AHCI */
-#else
 	struct ahci_uc_priv *uc_priv;
 	struct scsi_platdata *uc_plat;
 	struct udevice *dev;
@@ -1172,22 +1169,33 @@ int ahci_probe_scsi(struct udevice *ahci_dev)
 	if (!dev)
 		return -ENODEV;
 	uc_plat = dev_get_uclass_platdata(dev);
-	uc_plat->base = (ulong)dm_pci_map_bar(ahci_dev, PCI_BASE_ADDRESS_5,
-					      PCI_REGION_MEM);
+	uc_plat->base = base;
 	uc_plat->max_lun = 1;
 	uc_plat->max_id = 2;
-	uc_priv = dev_get_uclass_priv(dev);
+
+	uc_priv = dev_get_uclass_priv(ahci_dev);
 	ret = ahci_init_one(uc_priv, dev);
 	if (ret)
 		return ret;
 	ret = ahci_start_ports(uc_priv);
 	if (ret)
 		return ret;
-#endif
 
 	return 0;
 }
 
+#ifdef CONFIG_DM_PCI
+int ahci_probe_scsi_pci(struct udevice *ahci_dev)
+{
+	ulong base;
+
+	base = (ulong)dm_pci_map_bar(ahci_dev, PCI_BASE_ADDRESS_5,
+				     PCI_REGION_MEM);
+
+	return ahci_probe_scsi(ahci_dev, base);
+}
+#endif
+
 struct scsi_ops scsi_ops = {
 	.exec		= ahci_scsi_exec,
 	.bus_reset	= ahci_scsi_bus_reset,
diff --git a/include/ahci.h b/include/ahci.h
index 818f344..29f4ba1 100644
--- a/include/ahci.h
+++ b/include/ahci.h
@@ -218,8 +218,20 @@ int ahci_bind_scsi(struct udevice *ahci_dev, struct udevice **devp);
  * devices it finds.
  *
  * @ahci_dev: AHCI parent device
+ * @base: Base address of AHCI port
  * @return 0 if OK, -ve on error
  */
-int ahci_probe_scsi(struct udevice *ahci_dev);
+int ahci_probe_scsi(struct udevice *ahci_dev, ulong base);
+
+/**
+ * ahci_probe_scsi_pci() - probe and scan the attached SCSI bus on PCI
+ *
+ * Note that the SCSI device will itself bind block devices for any storage
+ * devices it finds.
+ *
+ * @ahci_dev: AHCI parent device
+ * @return 0 if OK, -ve on error
+ */
+int ahci_probe_scsi_pci(struct udevice *ahci_dev);
 
 #endif
-- 
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