1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2020, Loongson Corporation
5 #include <linux/clk-provider.h>
8 #include <linux/device.h>
9 #include <linux/of_irq.h>
12 static int loongson_default_data(struct plat_stmmacenet_data *plat)
14 plat->clk_csr = 2; /* clk_csr_i = 20-35MHz & MDC = clk_csr_i/16 */
16 plat->force_sf_dma_mode = 1;
18 /* Set default value for multicast hash bins */
19 plat->multicast_filter_bins = HASH_TABLE_SIZE;
21 /* Set default value for unicast filter entries */
22 plat->unicast_filter_entries = 1;
24 /* Set the maxmtu to a default of JUMBO_LEN */
25 plat->maxmtu = JUMBO_LEN;
27 /* Set default number of RX and TX queues to use */
28 plat->tx_queues_to_use = 1;
29 plat->rx_queues_to_use = 1;
31 /* Disable Priority config by default */
32 plat->tx_queues_cfg[0].use_prio = false;
33 plat->rx_queues_cfg[0].use_prio = false;
35 /* Disable RX queues routing by default */
36 plat->rx_queues_cfg[0].pkt_route = 0x0;
38 /* Default to phy auto-detection */
41 plat->dma_cfg->pbl = 32;
42 plat->dma_cfg->pblx8 = true;
44 plat->multicast_filter_bins = 256;
48 static int loongson_dwmac_probe(struct pci_dev *pdev, const struct pci_device_id *id)
50 struct plat_stmmacenet_data *plat;
51 struct stmmac_resources res;
52 struct device_node *np;
56 np = dev_of_node(&pdev->dev);
59 pr_info("dwmac_loongson_pci: No OF node\n");
63 if (!of_device_is_compatible(np, "loongson, pci-gmac")) {
64 pr_info("dwmac_loongson_pci: Incompatible OF node\n");
68 plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL);
72 if (plat->mdio_node) {
73 dev_err(&pdev->dev, "Found MDIO subnode\n");
78 plat->mdio_bus_data = devm_kzalloc(&pdev->dev,
79 sizeof(*plat->mdio_bus_data),
81 if (!plat->mdio_bus_data)
83 plat->mdio_bus_data->needs_reset = true;
86 plat->dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*plat->dma_cfg), GFP_KERNEL);
90 /* Enable pci device */
91 ret = pci_enable_device(pdev);
93 dev_err(&pdev->dev, "%s: ERROR: failed to enable device\n", __func__);
97 /* Get the base address of device */
98 for (i = 0; i < PCI_STD_NUM_BARS; i++) {
99 if (pci_resource_len(pdev, i) == 0)
101 ret = pcim_iomap_regions(pdev, BIT(0), pci_name(pdev));
107 plat->bus_id = of_alias_get_id(np, "ethernet");
108 if (plat->bus_id < 0)
109 plat->bus_id = pci_dev_id(pdev);
111 phy_mode = device_get_phy_mode(&pdev->dev);
113 dev_err(&pdev->dev, "phy_mode not found\n");
117 plat->phy_interface = phy_mode;
118 plat->interface = PHY_INTERFACE_MODE_GMII;
120 pci_set_master(pdev);
122 loongson_default_data(plat);
123 pci_enable_msi(pdev);
124 memset(&res, 0, sizeof(res));
125 res.addr = pcim_iomap_table(pdev)[0];
127 res.irq = of_irq_get_byname(np, "macirq");
129 dev_err(&pdev->dev, "IRQ macirq not found\n");
133 res.wol_irq = of_irq_get_byname(np, "eth_wake_irq");
134 if (res.wol_irq < 0) {
135 dev_info(&pdev->dev, "IRQ eth_wake_irq not found, using macirq\n");
136 res.wol_irq = res.irq;
139 res.lpi_irq = of_irq_get_byname(np, "eth_lpi");
140 if (res.lpi_irq < 0) {
141 dev_err(&pdev->dev, "IRQ eth_lpi not found\n");
145 return stmmac_dvr_probe(&pdev->dev, plat, &res);
148 static void loongson_dwmac_remove(struct pci_dev *pdev)
152 stmmac_dvr_remove(&pdev->dev);
154 for (i = 0; i < PCI_STD_NUM_BARS; i++) {
155 if (pci_resource_len(pdev, i) == 0)
157 pcim_iounmap_regions(pdev, BIT(i));
161 pci_disable_device(pdev);
164 static int __maybe_unused loongson_dwmac_suspend(struct device *dev)
166 struct pci_dev *pdev = to_pci_dev(dev);
169 ret = stmmac_suspend(dev);
173 ret = pci_save_state(pdev);
177 pci_disable_device(pdev);
178 pci_wake_from_d3(pdev, true);
182 static int __maybe_unused loongson_dwmac_resume(struct device *dev)
184 struct pci_dev *pdev = to_pci_dev(dev);
187 pci_restore_state(pdev);
188 pci_set_power_state(pdev, PCI_D0);
190 ret = pci_enable_device(pdev);
194 pci_set_master(pdev);
196 return stmmac_resume(dev);
199 static SIMPLE_DEV_PM_OPS(loongson_dwmac_pm_ops, loongson_dwmac_suspend,
200 loongson_dwmac_resume);
202 static const struct pci_device_id loongson_dwmac_id_table[] = {
203 { PCI_VDEVICE(LOONGSON, 0x7a03) },
206 MODULE_DEVICE_TABLE(pci, loongson_dwmac_id_table);
208 struct pci_driver loongson_dwmac_driver = {
209 .name = "dwmac-loongson-pci",
210 .id_table = loongson_dwmac_id_table,
211 .probe = loongson_dwmac_probe,
212 .remove = loongson_dwmac_remove,
214 .pm = &loongson_dwmac_pm_ops,
218 module_pci_driver(loongson_dwmac_driver);
220 MODULE_DESCRIPTION("Loongson DWMAC PCI driver");
221 MODULE_AUTHOR("Qing Zhang <zhangqing@loongson.cn>");
222 MODULE_LICENSE("GPL v2");