Thread (63 messages) 63 messages, 5 authors, 2024-04-05
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[PATCH net-next v8 02/11] net: stmmac: dwmac-loongson: Refactor code for loongson_dwmac_probe()

From: Yanteng Si <hidden>
Date: 2024-01-30 08:43:50
Subsystem: networking drivers, stmmac ethernet driver, the rest · Maintainers: Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds

The driver function is not changed, but the code location is
adjusted to prepare for adding more loongson drivers.

Signed-off-by: Yanteng Si <redacted>
Signed-off-by: Feiyang Chen <redacted>
Signed-off-by: Yinggang Gu <redacted>
---
 .../ethernet/stmicro/stmmac/dwmac-loongson.c  | 61 +++++++++++++------
 1 file changed, 42 insertions(+), 19 deletions(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
index 9e40c28d453a..e2dcb339b8b0 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
@@ -9,7 +9,12 @@
 #include <linux/of_irq.h>
 #include "stmmac.h"
 
-static int 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)
 {
 	plat->clk_csr = 2;	/* clk_csr_i = 20-35MHz & MDC = clk_csr_i/16 */
 	plat->has_gmac = 1;
@@ -34,23 +39,37 @@ static int loongson_default_data(struct plat_stmmacenet_data *plat)
 
 	/* Disable RX queues routing by default */
 	plat->rx_queues_cfg[0].pkt_route = 0x0;
+}
+
+static int loongson_gmac_data(struct pci_dev *pdev,
+			      struct plat_stmmacenet_data *plat)
+{
+	loongson_default_data(pdev, plat);
+
+	plat->multicast_filter_bins = 256;
+
+	plat->mdio_bus_data->phy_mask = 0;
 
-	/* Default to phy auto-detection */
 	plat->phy_addr = -1;
 
 	plat->dma_cfg->pbl = 32;
 	plat->dma_cfg->pblx8 = true;
 
-	plat->multicast_filter_bins = 256;
 	return 0;
 }
 
-static int loongson_dwmac_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+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)
 {
+	int ret, i, bus_id, phy_mode;
 	struct plat_stmmacenet_data *plat;
+	struct stmmac_pci_info *info;
 	struct stmmac_resources res;
 	struct device_node *np;
-	int ret, i, phy_mode;
 
 	np = dev_of_node(&pdev->dev);
 
@@ -69,18 +88,17 @@ static int loongson_dwmac_probe(struct pci_dev *pdev, const struct pci_device_id
 	if (!plat->mdio_bus_data)
 		return -ENOMEM;
 
+	plat->dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*plat->dma_cfg),
+				     GFP_KERNEL);
+	if (!plat->dma_cfg)
+		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;
-		goto err_put_node;
-	}
-
 	/* Enable pci device */
 	ret = pci_enable_device(pdev);
 	if (ret) {
@@ -98,9 +116,16 @@ 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);
+
+	info = (struct stmmac_pci_info *)id->driver_data;
+	ret = info->setup(pdev, plat);
+	if (ret)
+		goto err_disable_device;
+
+	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) {
@@ -110,11 +135,7 @@ static int loongson_dwmac_probe(struct pci_dev *pdev, const struct pci_device_id
 	}
 
 	plat->phy_interface = phy_mode;
-	plat->mac_interface = PHY_INTERFACE_MODE_GMII;
 
-	pci_set_master(pdev);
-
-	loongson_default_data(plat);
 	pci_enable_msi(pdev);
 	memset(&res, 0, sizeof(res));
 	res.addr = pcim_iomap_table(pdev)[0];
@@ -212,8 +233,10 @@ static int __maybe_unused loongson_dwmac_resume(struct device *dev)
 static SIMPLE_DEV_PM_OPS(loongson_dwmac_pm_ops, loongson_dwmac_suspend,
 			 loongson_dwmac_resume);
 
+#define PCI_DEVICE_ID_LOONGSON_GMAC	0x7a03
+
 static const struct pci_device_id loongson_dwmac_id_table[] = {
-	{ PCI_VDEVICE(LOONGSON, 0x7a03) },
+	{ PCI_DEVICE_DATA(LOONGSON, GMAC, &loongson_gmac_pci_info) },
 	{}
 };
 MODULE_DEVICE_TABLE(pci, loongson_dwmac_id_table);
-- 
2.31.4
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