netdev - [PATCH 5/5] libata/ahci: Apply non-standard BAR fix for Loongson

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Message-Id: <20191030135347.3636-6-jiaxun.yang@flygoat.com>
Date:   Wed, 30 Oct 2019 21:53:47 +0800
From:   Jiaxun Yang <jiaxun.yang@...goat.com>
To:     linux-mips@...r.kernel.org
Cc:     davem@...emloft.net, robh+dt@...nel.org, mark.rutland@....com,
        axboe@...nel.dk, peppe.cavallaro@...com, alexandre.torgue@...com,
        joabreu@...opsys.com, bhelgaas@...gle.com, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-ide@...r.kernel.org,
        linux-pci@...r.kernel.org, Jiaxun Yang <jiaxun.yang@...goat.com>
Subject: [PATCH 5/5] libata/ahci: Apply non-standard BAR fix for Loongson

Loongson is using BAR0 as AHCI registers BAR.

Signed-off-by: Jiaxun Yang <jiaxun.yang@...goat.com>
---
 drivers/ata/ahci.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index dd92faf197d5..db3d7b94ad53 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -42,6 +42,7 @@ enum {
 	AHCI_PCI_BAR_CAVIUM	= 0,
 	AHCI_PCI_BAR_ENMOTUS	= 2,
 	AHCI_PCI_BAR_CAVIUM_GEN5	= 4,
+	AHCI_PCI_BAR_LOONGSON	= 0,
 	AHCI_PCI_BAR_STANDARD	= 5,
 };
 
@@ -575,6 +576,9 @@ static const struct pci_device_id ahci_pci_tbl[] = {
 	/* Enmotus */
 	{ PCI_DEVICE(0x1c44, 0x8000), board_ahci },
 
+	/* Loongson */
+	{ PCI_VDEVICE(LOONGSON, 0x7a08), board_ahci },
+
 	/* Generic, PCI class code for AHCI */
 	{ PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
 	  PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci },
@@ -1663,6 +1667,9 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 			ahci_pci_bar = AHCI_PCI_BAR_CAVIUM;
 		if (pdev->device == 0xa084)
 			ahci_pci_bar = AHCI_PCI_BAR_CAVIUM_GEN5;
+	} else if (pdev->vendor == PCI_VENDOR_ID_LOONGSON) {
+		if (pdev->device == PCI_DEVICE_ID_LOONGSON_AHCI)
+			ahci_pci_bar = AHCI_PCI_BAR_LOONGSON;
 	}
 
 	/* acquire resources */
-- 
2.23.0