[PATCH v2 17/25] ata: ahci: Add BAR index quirk for Cavium PCI SATA device

[Stefan Roese]

From: Suneel Garapati <sgarapati at marvell.com>

For SATA controller found on OcteonTX SoC's, use non-standard PCI BAR0
instead of BAR5.

Signed-off-by: Suneel Garapati <sgarapati at marvell.com>
Reviewed-by: Simon Glass <sjg at chromium.org>

Signed-off-by: Stefan Roese <sr at denx.de>
---

Changes in v2:
- Add Reviewed-by tag from Simon
- Add note about adding a Kconfig option for AHCI quirks, once there
  are multiple quirks

Changes in v1:
- Change patch subject
- Use constants from pci_ids.h instead of hardcoded values

 drivers/ata/ahci.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 47cdea1f58..22bc0d3b10 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1198,10 +1198,25 @@ int ahci_probe_scsi(struct udevice *ahci_dev, ulong base)
 int ahci_probe_scsi_pci(struct udevice *ahci_dev)
 {
 	ulong base;
+	u16 vendor, device;
 
 	base = (ulong)dm_pci_map_bar(ahci_dev, PCI_BASE_ADDRESS_5,
 				     PCI_REGION_MEM);
 
+	/*
+	 * Note:
+	 * Right now, we have only one quirk here, which is not enough to
+	 * introduce a new Kconfig option to select this. Once we have more
+	 * quirks in this AHCI code, we should add a Kconfig option for
+	 * this though.
+	 */
+	dm_pci_read_config16(ahci_dev, PCI_VENDOR_ID, &vendor);
+	dm_pci_read_config16(ahci_dev, PCI_DEVICE_ID, &device);
+
+	if (vendor == PCI_VENDOR_ID_CAVIUM &&
+	    device == PCI_DEVICE_ID_CAVIUM_SATA)
+		base = (uintptr_t)dm_pci_map_bar(ahci_dev, PCI_BASE_ADDRESS_0,
+						 PCI_REGION_MEM);
 	return ahci_probe_scsi(ahci_dev, base);
 }
 #endif
-- 
2.28.0