1 /******************************************************************************* 2 This contains the functions to handle the pci driver. 3 4 Copyright (C) 2011-2012 Vayavya Labs Pvt Ltd 5 6 This program is free software; you can redistribute it and/or modify it 7 under the terms and conditions of the GNU General Public License, 8 version 2, as published by the Free Software Foundation. 9 10 This program is distributed in the hope it will be useful, but WITHOUT 11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13 more details. 14 15 You should have received a copy of the GNU General Public License along with 16 this program; if not, write to the Free Software Foundation, Inc., 17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 18 19 The full GNU General Public License is included in this distribution in 20 the file called "COPYING". 21 22 Author: Rayagond Kokatanur <rayagond@vayavyalabs.com> 23 Author: Giuseppe Cavallaro <peppe.cavallaro@st.com> 24 *******************************************************************************/ 25 26 #include <linux/pci.h> 27 #include <linux/dmi.h> 28 29 #include "stmmac.h" 30 31 /* 32 * This struct is used to associate PCI Function of MAC controller on a board, 33 * discovered via DMI, with the address of PHY connected to the MAC. The 34 * negative value of the address means that MAC controller is not connected 35 * with PHY. 36 */ 37 struct stmmac_pci_dmi_data { 38 const char *name; 39 unsigned int func; 40 int phy_addr; 41 }; 42 43 struct stmmac_pci_info { 44 struct pci_dev *pdev; 45 int (*setup)(struct plat_stmmacenet_data *plat, 46 struct stmmac_pci_info *info); 47 struct stmmac_pci_dmi_data *dmi; 48 }; 49 50 static int stmmac_pci_find_phy_addr(struct stmmac_pci_info *info) 51 { 52 const char *name = dmi_get_system_info(DMI_BOARD_NAME); 53 unsigned int func = PCI_FUNC(info->pdev->devfn); 54 struct stmmac_pci_dmi_data *dmi; 55 56 /* 57 * Galileo boards with old firmware don't support DMI. We always return 58 * 1 here, so at least first found MAC controller would be probed. 59 */ 60 if (!name) 61 return 1; 62 63 for (dmi = info->dmi; dmi->name && *dmi->name; dmi++) { 64 if (!strcmp(dmi->name, name) && dmi->func == func) 65 return dmi->phy_addr; 66 } 67 68 return -ENODEV; 69 } 70 71 static void stmmac_default_data(struct plat_stmmacenet_data *plat) 72 { 73 plat->bus_id = 1; 74 plat->phy_addr = 0; 75 plat->interface = PHY_INTERFACE_MODE_GMII; 76 plat->clk_csr = 2; /* clk_csr_i = 20-35MHz & MDC = clk_csr_i/16 */ 77 plat->has_gmac = 1; 78 plat->force_sf_dma_mode = 1; 79 80 plat->mdio_bus_data->phy_reset = NULL; 81 plat->mdio_bus_data->phy_mask = 0; 82 83 plat->dma_cfg->pbl = 32; 84 plat->dma_cfg->burst_len = DMA_AXI_BLEN_256; 85 86 /* Set default value for multicast hash bins */ 87 plat->multicast_filter_bins = HASH_TABLE_SIZE; 88 89 /* Set default value for unicast filter entries */ 90 plat->unicast_filter_entries = 1; 91 } 92 93 static int quark_default_data(struct plat_stmmacenet_data *plat, 94 struct stmmac_pci_info *info) 95 { 96 struct pci_dev *pdev = info->pdev; 97 int ret; 98 99 /* 100 * Refuse to load the driver and register net device if MAC controller 101 * does not connect to any PHY interface. 102 */ 103 ret = stmmac_pci_find_phy_addr(info); 104 if (ret < 0) 105 return ret; 106 107 plat->bus_id = PCI_DEVID(pdev->bus->number, pdev->devfn); 108 plat->phy_addr = ret; 109 plat->interface = PHY_INTERFACE_MODE_RMII; 110 plat->clk_csr = 2; 111 plat->has_gmac = 1; 112 plat->force_sf_dma_mode = 1; 113 114 plat->mdio_bus_data->phy_reset = NULL; 115 plat->mdio_bus_data->phy_mask = 0; 116 117 plat->dma_cfg->pbl = 16; 118 plat->dma_cfg->burst_len = DMA_AXI_BLEN_256; 119 plat->dma_cfg->fixed_burst = 1; 120 121 /* Set default value for multicast hash bins */ 122 plat->multicast_filter_bins = HASH_TABLE_SIZE; 123 124 /* Set default value for unicast filter entries */ 125 plat->unicast_filter_entries = 1; 126 127 return 0; 128 } 129 130 static struct stmmac_pci_dmi_data quark_pci_dmi_data[] = { 131 { 132 .name = "Galileo", 133 .func = 6, 134 .phy_addr = 1, 135 }, 136 { 137 .name = "GalileoGen2", 138 .func = 6, 139 .phy_addr = 1, 140 }, 141 {} 142 }; 143 144 static struct stmmac_pci_info quark_pci_info = { 145 .setup = quark_default_data, 146 .dmi = quark_pci_dmi_data, 147 }; 148 149 /** 150 * stmmac_pci_probe 151 * 152 * @pdev: pci device pointer 153 * @id: pointer to table of device id/id's. 154 * 155 * Description: This probing function gets called for all PCI devices which 156 * match the ID table and are not "owned" by other driver yet. This function 157 * gets passed a "struct pci_dev *" for each device whose entry in the ID table 158 * matches the device. The probe functions returns zero when the driver choose 159 * to take "ownership" of the device or an error code(-ve no) otherwise. 160 */ 161 static int stmmac_pci_probe(struct pci_dev *pdev, 162 const struct pci_device_id *id) 163 { 164 struct stmmac_pci_info *info = (struct stmmac_pci_info *)id->driver_data; 165 struct plat_stmmacenet_data *plat; 166 struct stmmac_resources res; 167 int i; 168 int ret; 169 170 plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL); 171 if (!plat) 172 return -ENOMEM; 173 174 plat->mdio_bus_data = devm_kzalloc(&pdev->dev, 175 sizeof(*plat->mdio_bus_data), 176 GFP_KERNEL); 177 if (!plat->mdio_bus_data) 178 return -ENOMEM; 179 180 plat->dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*plat->dma_cfg), 181 GFP_KERNEL); 182 if (!plat->dma_cfg) 183 return -ENOMEM; 184 185 /* Enable pci device */ 186 ret = pcim_enable_device(pdev); 187 if (ret) { 188 dev_err(&pdev->dev, "%s: ERROR: failed to enable device\n", 189 __func__); 190 return ret; 191 } 192 193 /* Get the base address of device */ 194 for (i = 0; i <= PCI_STD_RESOURCE_END; i++) { 195 if (pci_resource_len(pdev, i) == 0) 196 continue; 197 ret = pcim_iomap_regions(pdev, BIT(i), pci_name(pdev)); 198 if (ret) 199 return ret; 200 break; 201 } 202 203 pci_set_master(pdev); 204 205 if (info) { 206 info->pdev = pdev; 207 if (info->setup) { 208 ret = info->setup(plat, info); 209 if (ret) 210 return ret; 211 } 212 } else 213 stmmac_default_data(plat); 214 215 pci_enable_msi(pdev); 216 217 memset(&res, 0, sizeof(res)); 218 res.addr = pcim_iomap_table(pdev)[i]; 219 res.wol_irq = pdev->irq; 220 res.irq = pdev->irq; 221 222 return stmmac_dvr_probe(&pdev->dev, plat, &res); 223 } 224 225 /** 226 * stmmac_pci_remove 227 * 228 * @pdev: platform device pointer 229 * Description: this function calls the main to free the net resources 230 * and releases the PCI resources. 231 */ 232 static void stmmac_pci_remove(struct pci_dev *pdev) 233 { 234 struct net_device *ndev = pci_get_drvdata(pdev); 235 236 stmmac_dvr_remove(ndev); 237 } 238 239 #ifdef CONFIG_PM_SLEEP 240 static int stmmac_pci_suspend(struct device *dev) 241 { 242 struct pci_dev *pdev = to_pci_dev(dev); 243 struct net_device *ndev = pci_get_drvdata(pdev); 244 245 return stmmac_suspend(ndev); 246 } 247 248 static int stmmac_pci_resume(struct device *dev) 249 { 250 struct pci_dev *pdev = to_pci_dev(dev); 251 struct net_device *ndev = pci_get_drvdata(pdev); 252 253 return stmmac_resume(ndev); 254 } 255 #endif 256 257 static SIMPLE_DEV_PM_OPS(stmmac_pm_ops, stmmac_pci_suspend, stmmac_pci_resume); 258 259 #define STMMAC_VENDOR_ID 0x700 260 #define STMMAC_QUARK_ID 0x0937 261 #define STMMAC_DEVICE_ID 0x1108 262 263 static const struct pci_device_id stmmac_id_table[] = { 264 {PCI_DEVICE(STMMAC_VENDOR_ID, STMMAC_DEVICE_ID)}, 265 {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_MAC)}, 266 {PCI_VDEVICE(INTEL, STMMAC_QUARK_ID), (kernel_ulong_t)&quark_pci_info}, 267 {} 268 }; 269 270 MODULE_DEVICE_TABLE(pci, stmmac_id_table); 271 272 static struct pci_driver stmmac_pci_driver = { 273 .name = STMMAC_RESOURCE_NAME, 274 .id_table = stmmac_id_table, 275 .probe = stmmac_pci_probe, 276 .remove = stmmac_pci_remove, 277 .driver = { 278 .pm = &stmmac_pm_ops, 279 }, 280 }; 281 282 module_pci_driver(stmmac_pci_driver); 283 284 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PCI driver"); 285 MODULE_AUTHOR("Rayagond Kokatanur <rayagond.kokatanur@vayavyalabs.com>"); 286 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>"); 287 MODULE_LICENSE("GPL"); 288