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 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 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 if (!of_device_is_compatible(np, "loongson, pci-gmac")) { 63 pr_info("dwmac_loongson_pci: Incompatible OF node\n"); 64 return -ENODEV; 65 } 66 67 plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL); 68 if (!plat) 69 return -ENOMEM; 70 71 plat->mdio_node = of_get_child_by_name(np, "mdio"); 72 if (plat->mdio_node) { 73 dev_info(&pdev->dev, "Found MDIO subnode\n"); 74 75 plat->mdio_bus_data = devm_kzalloc(&pdev->dev, 76 sizeof(*plat->mdio_bus_data), 77 GFP_KERNEL); 78 if (!plat->mdio_bus_data) { 79 ret = -ENOMEM; 80 goto err_put_node; 81 } 82 plat->mdio_bus_data->needs_reset = true; 83 } 84 85 plat->dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*plat->dma_cfg), GFP_KERNEL); 86 if (!plat->dma_cfg) { 87 ret = -ENOMEM; 88 goto err_put_node; 89 } 90 91 /* Enable pci device */ 92 ret = pci_enable_device(pdev); 93 if (ret) { 94 dev_err(&pdev->dev, "%s: ERROR: failed to enable device\n", __func__); 95 goto err_put_node; 96 } 97 98 /* Get the base address of device */ 99 for (i = 0; i < PCI_STD_NUM_BARS; i++) { 100 if (pci_resource_len(pdev, i) == 0) 101 continue; 102 ret = pcim_iomap_regions(pdev, BIT(0), pci_name(pdev)); 103 if (ret) 104 goto err_disable_device; 105 break; 106 } 107 108 plat->bus_id = of_alias_get_id(np, "ethernet"); 109 if (plat->bus_id < 0) 110 plat->bus_id = pci_dev_id(pdev); 111 112 phy_mode = device_get_phy_mode(&pdev->dev); 113 if (phy_mode < 0) { 114 dev_err(&pdev->dev, "phy_mode not found\n"); 115 ret = phy_mode; 116 goto err_disable_device; 117 } 118 119 plat->phy_interface = phy_mode; 120 plat->mac_interface = PHY_INTERFACE_MODE_GMII; 121 122 pci_set_master(pdev); 123 124 loongson_default_data(plat); 125 pci_enable_msi(pdev); 126 memset(&res, 0, sizeof(res)); 127 res.addr = pcim_iomap_table(pdev)[0]; 128 129 res.irq = of_irq_get_byname(np, "macirq"); 130 if (res.irq < 0) { 131 dev_err(&pdev->dev, "IRQ macirq not found\n"); 132 ret = -ENODEV; 133 goto err_disable_msi; 134 } 135 136 res.wol_irq = of_irq_get_byname(np, "eth_wake_irq"); 137 if (res.wol_irq < 0) { 138 dev_info(&pdev->dev, "IRQ eth_wake_irq not found, using macirq\n"); 139 res.wol_irq = res.irq; 140 } 141 142 res.lpi_irq = of_irq_get_byname(np, "eth_lpi"); 143 if (res.lpi_irq < 0) { 144 dev_err(&pdev->dev, "IRQ eth_lpi not found\n"); 145 ret = -ENODEV; 146 goto err_disable_msi; 147 } 148 149 ret = stmmac_dvr_probe(&pdev->dev, plat, &res); 150 if (ret) 151 goto err_disable_msi; 152 153 return ret; 154 155 err_disable_msi: 156 pci_disable_msi(pdev); 157 err_disable_device: 158 pci_disable_device(pdev); 159 err_put_node: 160 of_node_put(plat->mdio_node); 161 return ret; 162 } 163 164 static void loongson_dwmac_remove(struct pci_dev *pdev) 165 { 166 struct net_device *ndev = dev_get_drvdata(&pdev->dev); 167 struct stmmac_priv *priv = netdev_priv(ndev); 168 int i; 169 170 of_node_put(priv->plat->mdio_node); 171 stmmac_dvr_remove(&pdev->dev); 172 173 for (i = 0; i < PCI_STD_NUM_BARS; i++) { 174 if (pci_resource_len(pdev, i) == 0) 175 continue; 176 pcim_iounmap_regions(pdev, BIT(i)); 177 break; 178 } 179 180 pci_disable_msi(pdev); 181 pci_disable_device(pdev); 182 } 183 184 static int __maybe_unused loongson_dwmac_suspend(struct device *dev) 185 { 186 struct pci_dev *pdev = to_pci_dev(dev); 187 int ret; 188 189 ret = stmmac_suspend(dev); 190 if (ret) 191 return ret; 192 193 ret = pci_save_state(pdev); 194 if (ret) 195 return ret; 196 197 pci_disable_device(pdev); 198 pci_wake_from_d3(pdev, true); 199 return 0; 200 } 201 202 static int __maybe_unused loongson_dwmac_resume(struct device *dev) 203 { 204 struct pci_dev *pdev = to_pci_dev(dev); 205 int ret; 206 207 pci_restore_state(pdev); 208 pci_set_power_state(pdev, PCI_D0); 209 210 ret = pci_enable_device(pdev); 211 if (ret) 212 return ret; 213 214 pci_set_master(pdev); 215 216 return stmmac_resume(dev); 217 } 218 219 static SIMPLE_DEV_PM_OPS(loongson_dwmac_pm_ops, loongson_dwmac_suspend, 220 loongson_dwmac_resume); 221 222 static const struct pci_device_id loongson_dwmac_id_table[] = { 223 { PCI_VDEVICE(LOONGSON, 0x7a03) }, 224 {} 225 }; 226 MODULE_DEVICE_TABLE(pci, loongson_dwmac_id_table); 227 228 static struct pci_driver loongson_dwmac_driver = { 229 .name = "dwmac-loongson-pci", 230 .id_table = loongson_dwmac_id_table, 231 .probe = loongson_dwmac_probe, 232 .remove = loongson_dwmac_remove, 233 .driver = { 234 .pm = &loongson_dwmac_pm_ops, 235 }, 236 }; 237 238 module_pci_driver(loongson_dwmac_driver); 239 240 MODULE_DESCRIPTION("Loongson DWMAC PCI driver"); 241 MODULE_AUTHOR("Qing Zhang <zhangqing@loongson.cn>"); 242 MODULE_LICENSE("GPL v2"); 243