linux-kernel - [PATCH 2/6] AHCI: Add support for Loongson 7A1000 SATA controller

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Message-Id: <1583742206-29163-3-git-send-email-yangtiezhu@loongson.cn>
Date:   Mon,  9 Mar 2020 16:23:22 +0800
From:   Tiezhu Yang <yangtiezhu@...ngson.cn>
To:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Huacai Chen <chenhc@...ote.com>,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Jens Axboe <axboe@...nel.dk>
Cc:     linux-mips@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
        Xuefeng Li <lixuefeng@...ngson.cn>
Subject: [PATCH 2/6] AHCI: Add support for Loongson 7A1000 SATA controller

Loongson 7A1000 SATA controller uses BAR0 as the base address register.

Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
---
 drivers/ata/ahci.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 11ea1af..28a336e 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -40,6 +40,7 @@
 enum {
 	AHCI_PCI_BAR_STA2X11	= 0,
 	AHCI_PCI_BAR_CAVIUM	= 0,
+	AHCI_PCI_BAR_LOONGSON	= 0,
 	AHCI_PCI_BAR_ENMOTUS	= 2,
 	AHCI_PCI_BAR_CAVIUM_GEN5	= 4,
 	AHCI_PCI_BAR_STANDARD	= 5,
@@ -589,6 +590,10 @@ static const struct pci_device_id ahci_pci_tbl[] = {
 	/* Enmotus */
 	{ PCI_DEVICE(0x1c44, 0x8000), board_ahci },
 
+	/* Loongson */
+	{ PCI_VDEVICE(LOONGSON, PCI_DEVICE_ID_LOONGSON_7A1000_SATA),
+	  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 },
@@ -1680,6 +1685,9 @@ 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_7A1000_SATA)
+			ahci_pci_bar = AHCI_PCI_BAR_LOONGSON;
 	}
 
 	/* acquire resources */
-- 
2.1.0