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