1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2020, Loongson Corporation
3 */
4
5 #include <linux/clk-provider.h>
6 #include <linux/pci.h>
7 #include <linux/dmi.h>
8 #include <linux/device.h>
9 #include <linux/of_irq.h>
10 #include "stmmac.h"
11
loongson_default_data(struct plat_stmmacenet_data * plat)12 static int loongson_default_data(struct plat_stmmacenet_data *plat)
13 {
14 plat->clk_csr = 2; /* clk_csr_i = 20-35MHz & MDC = clk_csr_i/16 */
15 plat->has_gmac = 1;
16 plat->force_sf_dma_mode = 1;
17
18 /* Set default value for multicast hash bins */
19 plat->multicast_filter_bins = HASH_TABLE_SIZE;
20
21 /* Set default value for unicast filter entries */
22 plat->unicast_filter_entries = 1;
23
24 /* Set the maxmtu to a default of JUMBO_LEN */
25 plat->maxmtu = JUMBO_LEN;
26
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;
30
31 /* Disable Priority config by default */
32 plat->tx_queues_cfg[0].use_prio = false;
33 plat->rx_queues_cfg[0].use_prio = false;
34
35 /* Disable RX queues routing by default */
36 plat->rx_queues_cfg[0].pkt_route = 0x0;
37
38 /* Default to phy auto-detection */
39 plat->phy_addr = -1;
40
41 plat->dma_cfg->pbl = 32;
42 plat->dma_cfg->pblx8 = true;
43
44 plat->multicast_filter_bins = 256;
45 return 0;
46 }
47
loongson_dwmac_probe(struct pci_dev * pdev,const struct pci_device_id * id)48 static int loongson_dwmac_probe(struct pci_dev *pdev, const struct pci_device_id *id)
49 {
50 struct plat_stmmacenet_data *plat;
51 struct stmmac_resources res;
52 struct device_node *np;
53 int ret, i, phy_mode;
54
55 np = dev_of_node(&pdev->dev);
56
57 if (!np) {
58 pr_info("dwmac_loongson_pci: No OF node\n");
59 return -ENODEV;
60 }
61
62 plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL);
63 if (!plat)
64 return -ENOMEM;
65
66 plat->mdio_bus_data = devm_kzalloc(&pdev->dev,
67 sizeof(*plat->mdio_bus_data),
68 GFP_KERNEL);
69 if (!plat->mdio_bus_data)
70 return -ENOMEM;
71
72 plat->mdio_node = of_get_child_by_name(np, "mdio");
73 if (plat->mdio_node) {
74 dev_info(&pdev->dev, "Found MDIO subnode\n");
75 plat->mdio_bus_data->needs_reset = true;
76 }
77
78 plat->dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*plat->dma_cfg), GFP_KERNEL);
79 if (!plat->dma_cfg) {
80 ret = -ENOMEM;
81 goto err_put_node;
82 }
83
84 /* Enable pci device */
85 ret = pci_enable_device(pdev);
86 if (ret) {
87 dev_err(&pdev->dev, "%s: ERROR: failed to enable device\n", __func__);
88 goto err_put_node;
89 }
90
91 /* Get the base address of device */
92 for (i = 0; i < PCI_STD_NUM_BARS; i++) {
93 if (pci_resource_len(pdev, i) == 0)
94 continue;
95 ret = pcim_iomap_regions(pdev, BIT(0), pci_name(pdev));
96 if (ret)
97 goto err_disable_device;
98 break;
99 }
100
101 plat->bus_id = of_alias_get_id(np, "ethernet");
102 if (plat->bus_id < 0)
103 plat->bus_id = pci_dev_id(pdev);
104
105 phy_mode = device_get_phy_mode(&pdev->dev);
106 if (phy_mode < 0) {
107 dev_err(&pdev->dev, "phy_mode not found\n");
108 ret = phy_mode;
109 goto err_disable_device;
110 }
111
112 plat->phy_interface = phy_mode;
113 plat->mac_interface = PHY_INTERFACE_MODE_GMII;
114
115 pci_set_master(pdev);
116
117 loongson_default_data(plat);
118 pci_enable_msi(pdev);
119 memset(&res, 0, sizeof(res));
120 res.addr = pcim_iomap_table(pdev)[0];
121
122 res.irq = of_irq_get_byname(np, "macirq");
123 if (res.irq < 0) {
124 dev_err(&pdev->dev, "IRQ macirq not found\n");
125 ret = -ENODEV;
126 goto err_disable_msi;
127 }
128
129 res.wol_irq = of_irq_get_byname(np, "eth_wake_irq");
130 if (res.wol_irq < 0) {
131 dev_info(&pdev->dev, "IRQ eth_wake_irq not found, using macirq\n");
132 res.wol_irq = res.irq;
133 }
134
135 res.lpi_irq = of_irq_get_byname(np, "eth_lpi");
136 if (res.lpi_irq < 0) {
137 dev_err(&pdev->dev, "IRQ eth_lpi not found\n");
138 ret = -ENODEV;
139 goto err_disable_msi;
140 }
141
142 ret = stmmac_dvr_probe(&pdev->dev, plat, &res);
143 if (ret)
144 goto err_disable_msi;
145
146 return ret;
147
148 err_disable_msi:
149 pci_disable_msi(pdev);
150 err_disable_device:
151 pci_disable_device(pdev);
152 err_put_node:
153 of_node_put(plat->mdio_node);
154 return ret;
155 }
156
loongson_dwmac_remove(struct pci_dev * pdev)157 static void loongson_dwmac_remove(struct pci_dev *pdev)
158 {
159 struct net_device *ndev = dev_get_drvdata(&pdev->dev);
160 struct stmmac_priv *priv = netdev_priv(ndev);
161 int i;
162
163 of_node_put(priv->plat->mdio_node);
164 stmmac_dvr_remove(&pdev->dev);
165
166 for (i = 0; i < PCI_STD_NUM_BARS; i++) {
167 if (pci_resource_len(pdev, i) == 0)
168 continue;
169 pcim_iounmap_regions(pdev, BIT(i));
170 break;
171 }
172
173 pci_disable_msi(pdev);
174 pci_disable_device(pdev);
175 }
176
loongson_dwmac_suspend(struct device * dev)177 static int __maybe_unused loongson_dwmac_suspend(struct device *dev)
178 {
179 struct pci_dev *pdev = to_pci_dev(dev);
180 int ret;
181
182 ret = stmmac_suspend(dev);
183 if (ret)
184 return ret;
185
186 ret = pci_save_state(pdev);
187 if (ret)
188 return ret;
189
190 pci_disable_device(pdev);
191 pci_wake_from_d3(pdev, true);
192 return 0;
193 }
194
loongson_dwmac_resume(struct device * dev)195 static int __maybe_unused loongson_dwmac_resume(struct device *dev)
196 {
197 struct pci_dev *pdev = to_pci_dev(dev);
198 int ret;
199
200 pci_restore_state(pdev);
201 pci_set_power_state(pdev, PCI_D0);
202
203 ret = pci_enable_device(pdev);
204 if (ret)
205 return ret;
206
207 pci_set_master(pdev);
208
209 return stmmac_resume(dev);
210 }
211
212 static SIMPLE_DEV_PM_OPS(loongson_dwmac_pm_ops, loongson_dwmac_suspend,
213 loongson_dwmac_resume);
214
215 static const struct pci_device_id loongson_dwmac_id_table[] = {
216 { PCI_VDEVICE(LOONGSON, 0x7a03) },
217 {}
218 };
219 MODULE_DEVICE_TABLE(pci, loongson_dwmac_id_table);
220
221 static struct pci_driver loongson_dwmac_driver = {
222 .name = "dwmac-loongson-pci",
223 .id_table = loongson_dwmac_id_table,
224 .probe = loongson_dwmac_probe,
225 .remove = loongson_dwmac_remove,
226 .driver = {
227 .pm = &loongson_dwmac_pm_ops,
228 },
229 };
230
231 module_pci_driver(loongson_dwmac_driver);
232
233 MODULE_DESCRIPTION("Loongson DWMAC PCI driver");
234 MODULE_AUTHOR("Qing Zhang <zhangqing@loongson.cn>");
235 MODULE_LICENSE("GPL v2");
236