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Message-Id: <d3bad82c41964925f9284ccdd8ec07160cac5519.1714046812.git.siyanteng@loongson.cn>
Date: Thu, 25 Apr 2024 21:10:35 +0800
From: Yanteng Si <siyanteng@...ngson.cn>
To: andrew@...n.ch,
	hkallweit1@...il.com,
	peppe.cavallaro@...com,
	alexandre.torgue@...s.st.com,
	joabreu@...opsys.com,
	fancer.lancer@...il.com
Cc: Yanteng Si <siyanteng@...ngson.cn>,
	Jose.Abreu@...opsys.com,
	chenhuacai@...nel.org,
	linux@...linux.org.uk,
	guyinggang@...ngson.cn,
	netdev@...r.kernel.org,
	chris.chenfeiyang@...il.com,
	siyanteng01@...il.com
Subject: [PATCH net-next v12 10/15] net: stmmac: dwmac-loongson: Add full PCI support

Current dwmac-loongson only support LS2K in the "probed with PCI and
configured with DT" manner. Add LS7A support on which the devices are
fully PCI (non-DT).

Others:
LS2K is a SoC and LS7A is a bridge chip.

Signed-off-by: Feiyang Chen <chenfeiyang@...ngson.cn>
Signed-off-by: Yinggang Gu <guyinggang@...ngson.cn>
Signed-off-by: Yanteng Si <siyanteng@...ngson.cn>
---
 .../ethernet/stmicro/stmmac/dwmac-loongson.c  | 113 ++++++++++--------
 1 file changed, 65 insertions(+), 48 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
index e989cb835340..1022bceaa680 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
@@ -11,8 +11,17 @@
 
 #define PCI_DEVICE_ID_LOONGSON_GMAC	0x7a03
 
-static void loongson_default_data(struct plat_stmmacenet_data *plat)
+struct stmmac_pci_info {
+	int (*setup)(struct pci_dev *pdev, struct plat_stmmacenet_data *plat);
+};
+
+static void loongson_default_data(struct pci_dev *pdev,
+				  struct plat_stmmacenet_data *plat)
 {
+	/* Get bus_id, this can be overloaded later */
+	plat->bus_id = (pci_domain_nr(pdev->bus) << 16) |
+			PCI_DEVID(pdev->bus->number, pdev->devfn);
+
 	plat->clk_csr = 2;	/* clk_csr_i = 20-35MHz & MDC = clk_csr_i/16 */
 	plat->has_gmac = 1;
 	plat->force_sf_dma_mode = 1;
@@ -44,9 +53,10 @@ static void loongson_default_data(struct plat_stmmacenet_data *plat)
 	plat->multicast_filter_bins = 256;
 }
 
-static int loongson_gmac_data(struct plat_stmmacenet_data *plat)
+static int loongson_gmac_data(struct pci_dev *pdev,
+			      struct plat_stmmacenet_data *plat)
 {
-	loongson_default_data(plat);
+	loongson_default_data(pdev, plat);
 
 	plat->mdio_bus_data->phy_mask = 0;
 	plat->phy_interface = PHY_INTERFACE_MODE_RGMII_ID;
@@ -54,20 +64,20 @@ static int loongson_gmac_data(struct plat_stmmacenet_data *plat)
 	return 0;
 }
 
+static struct stmmac_pci_info loongson_gmac_pci_info = {
+	.setup = loongson_gmac_data,
+};
+
 static int loongson_dwmac_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 {
 	struct plat_stmmacenet_data *plat;
+	int ret, i, bus_id, phy_mode;
+	struct stmmac_pci_info *info;
 	struct stmmac_resources res;
 	struct device_node *np;
-	int ret, i, phy_mode;
 
 	np = dev_of_node(&pdev->dev);
 
-	if (!np) {
-		pr_info("dwmac_loongson_pci: No OF node\n");
-		return -ENODEV;
-	}
-
 	plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL);
 	if (!plat)
 		return -ENOMEM;
@@ -78,12 +88,6 @@ static int loongson_dwmac_probe(struct pci_dev *pdev, const struct pci_device_id
 	if (!plat->mdio_bus_data)
 		return -ENOMEM;
 
-	plat->mdio_node = of_get_child_by_name(np, "mdio");
-	if (plat->mdio_node) {
-		dev_info(&pdev->dev, "Found MDIO subnode\n");
-		plat->mdio_bus_data->needs_reset = true;
-	}
-
 	plat->dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*plat->dma_cfg), GFP_KERNEL);
 	if (!plat->dma_cfg) {
 		ret = -ENOMEM;
@@ -107,46 +111,59 @@ static int loongson_dwmac_probe(struct pci_dev *pdev, const struct pci_device_id
 		break;
 	}
 
-	plat->bus_id = of_alias_get_id(np, "ethernet");
-	if (plat->bus_id < 0)
-		plat->bus_id = pci_dev_id(pdev);
+	pci_set_master(pdev);
 
-	phy_mode = device_get_phy_mode(&pdev->dev);
-	if (phy_mode < 0) {
-		dev_err(&pdev->dev, "phy_mode not found\n");
-		ret = phy_mode;
+	info = (struct stmmac_pci_info *)id->driver_data;
+	ret = info->setup(pdev, plat);
+	if (ret)
 		goto err_disable_device;
-	}
 
-	plat->phy_interface = phy_mode;
-
-	pci_set_master(pdev);
+	if (np) {
+		plat->mdio_node = of_get_child_by_name(np, "mdio");
+		if (plat->mdio_node) {
+			dev_info(&pdev->dev, "Found MDIO subnode\n");
+			plat->mdio_bus_data->needs_reset = true;
+		}
+
+		bus_id = of_alias_get_id(np, "ethernet");
+		if (bus_id >= 0)
+			plat->bus_id = bus_id;
+
+		phy_mode = device_get_phy_mode(&pdev->dev);
+		if (phy_mode < 0) {
+			dev_err(&pdev->dev, "phy_mode not found\n");
+			ret = phy_mode;
+			goto err_disable_device;
+		}
+		plat->phy_interface = phy_mode;
+
+		res.irq = of_irq_get_byname(np, "macirq");
+		if (res.irq < 0) {
+			dev_err(&pdev->dev, "IRQ macirq not found\n");
+			ret = -ENODEV;
+			goto err_disable_msi;
+		}
+
+		res.wol_irq = of_irq_get_byname(np, "eth_wake_irq");
+		if (res.wol_irq < 0) {
+			dev_info(&pdev->dev, "IRQ eth_wake_irq not found, using macirq\n");
+			res.wol_irq = res.irq;
+		}
+
+		res.lpi_irq = of_irq_get_byname(np, "eth_lpi");
+		if (res.lpi_irq < 0) {
+			dev_err(&pdev->dev, "IRQ eth_lpi not found\n");
+			ret = -ENODEV;
+			goto err_disable_msi;
+		}
+	} else {
+		res.irq = pdev->irq;
+	}
 
-	loongson_gmac_data(plat);
 	pci_enable_msi(pdev);
 	memset(&res, 0, sizeof(res));
 	res.addr = pcim_iomap_table(pdev)[0];
 
-	res.irq = of_irq_get_byname(np, "macirq");
-	if (res.irq < 0) {
-		dev_err(&pdev->dev, "IRQ macirq not found\n");
-		ret = -ENODEV;
-		goto err_disable_msi;
-	}
-
-	res.wol_irq = of_irq_get_byname(np, "eth_wake_irq");
-	if (res.wol_irq < 0) {
-		dev_info(&pdev->dev, "IRQ eth_wake_irq not found, using macirq\n");
-		res.wol_irq = res.irq;
-	}
-
-	res.lpi_irq = of_irq_get_byname(np, "eth_lpi");
-	if (res.lpi_irq < 0) {
-		dev_err(&pdev->dev, "IRQ eth_lpi not found\n");
-		ret = -ENODEV;
-		goto err_disable_msi;
-	}
-
 	plat->tx_queues_to_use = 1;
 	plat->rx_queues_to_use = 1;
 
@@ -224,7 +241,7 @@ static SIMPLE_DEV_PM_OPS(loongson_dwmac_pm_ops, loongson_dwmac_suspend,
 			 loongson_dwmac_resume);
 
 static const struct pci_device_id loongson_dwmac_id_table[] = {
-	{ PCI_DEVICE_DATA(LOONGSON, GMAC, NULL) },
+	{ PCI_DEVICE_DATA(LOONGSON, GMAC, &loongson_gmac_pci_info) },
 	{}
 };
 MODULE_DEVICE_TABLE(pci, loongson_dwmac_id_table);
-- 
2.31.4


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