From a5c680fe1042d2e13efeb12af076f4bd1ad1b82d Mon Sep 17 00:00:00 2001
From: Bin Meng <bmeng.cn@gmail.com>
Date: Sun, 30 Jul 2017 19:23:59 -0700
Subject: [PATCH] dm: scsi: Add a generic PCI-based AHCI driver

This adds support for PCI-based AHCI controller based on DM SCSI.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>
---
 drivers/ata/Kconfig    |  6 ++++++
 drivers/ata/Makefile   |  1 +
 drivers/ata/ahci-pci.c | 42 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 49 insertions(+)
 create mode 100644 drivers/ata/ahci-pci.c

diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index 6427f1b..db05160 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -40,6 +40,12 @@ config DM_SCSI
 
 menu "SATA/SCSI device support"
 
+config AHCI_PCI
+	bool "Support for PCI-based AHCI controller"
+	depends on DM_SCSI
+	help
+	  Enables support for the PCI-based AHCI controller.
+
 config SATA_CEVA
 	bool "Ceva Sata controller"
 	depends on AHCI
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index c48184c..4e2de93 100644
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -7,6 +7,7 @@
 
 obj-$(CONFIG_DWC_AHCI) += dwc_ahci.o
 obj-$(CONFIG_AHCI) += ahci-uclass.o
+obj-$(CONFIG_AHCI_PCI) += ahci-pci.o
 obj-$(CONFIG_SCSI_AHCI) += ahci.o
 obj-$(CONFIG_DWC_AHSATA) += dwc_ahsata.o
 obj-$(CONFIG_FSL_SATA) += fsl_sata.o
diff --git a/drivers/ata/ahci-pci.c b/drivers/ata/ahci-pci.c
new file mode 100644
index 0000000..f46fad8
--- /dev/null
+++ b/drivers/ata/ahci-pci.c
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2017, Bin Meng <bmeng.cn@gmail.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <ahci.h>
+#include <dm.h>
+#include <pci.h>
+
+static int ahci_pci_bind(struct udevice *dev)
+{
+	struct udevice *scsi_dev;
+
+	return ahci_bind_scsi(dev, &scsi_dev);
+}
+
+static int ahci_pci_probe(struct udevice *dev)
+{
+	return ahci_probe_scsi(dev);
+}
+
+static const struct udevice_id ahci_pci_ids[] = {
+	{ .compatible = "ahci-pci" },
+	{ }
+};
+
+U_BOOT_DRIVER(ahci_pci) = {
+	.name	= "ahci_pci",
+	.id	= UCLASS_AHCI,
+	.of_match = ahci_pci_ids,
+	.bind	= ahci_pci_bind,
+	.probe = ahci_pci_probe,
+};
+
+static struct pci_device_id ahci_pci_supported[] = {
+	{ PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_SATA_AHCI, ~0) },
+	{},
+};
+
+U_BOOT_PCI_DEVICE(ahci_pci, ahci_pci_supported);