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->pblx8 = true; 85 /* TODO: AXI */ 86 87 /* Set default value for multicast hash bins */ 88 plat->multicast_filter_bins = HASH_TABLE_SIZE; 89 90 /* Set default value for unicast filter entries */ 91 plat->unicast_filter_entries = 1; 92 93 /* Set the maxmtu to a default of JUMBO_LEN */ 94 plat->maxmtu = JUMBO_LEN; 95 } 96 97 static int quark_default_data(struct plat_stmmacenet_data *plat, 98 struct stmmac_pci_info *info) 99 { 100 struct pci_dev *pdev = info->pdev; 101 int ret; 102 103 /* 104 * Refuse to load the driver and register net device if MAC controller 105 * does not connect to any PHY interface. 106 */ 107 ret = stmmac_pci_find_phy_addr(info); 108 if (ret < 0) 109 return ret; 110 111 plat->bus_id = PCI_DEVID(pdev->bus->number, pdev->devfn); 112 plat->phy_addr = ret; 113 plat->interface = PHY_INTERFACE_MODE_RMII; 114 plat->clk_csr = 2; 115 plat->has_gmac = 1; 116 plat->force_sf_dma_mode = 1; 117 118 plat->mdio_bus_data->phy_reset = NULL; 119 plat->mdio_bus_data->phy_mask = 0; 120 121 plat->dma_cfg->pbl = 16; 122 plat->dma_cfg->pblx8 = true; 123 plat->dma_cfg->fixed_burst = 1; 124 /* AXI (TODO) */ 125 126 /* Set default value for multicast hash bins */ 127 plat->multicast_filter_bins = HASH_TABLE_SIZE; 128 129 /* Set default value for unicast filter entries */ 130 plat->unicast_filter_entries = 1; 131 132 /* Set the maxmtu to a default of JUMBO_LEN */ 133 plat->maxmtu = JUMBO_LEN; 134 135 return 0; 136 } 137 138 static struct stmmac_pci_dmi_data quark_pci_dmi_data[] = { 139 { 140 .name = "Galileo", 141 .func = 6, 142 .phy_addr = 1, 143 }, 144 { 145 .name = "GalileoGen2", 146 .func = 6, 147 .phy_addr = 1, 148 }, 149 {} 150 }; 151 152 static struct stmmac_pci_info quark_pci_info = { 153 .setup = quark_default_data, 154 .dmi = quark_pci_dmi_data, 155 }; 156 157 /** 158 * stmmac_pci_probe 159 * 160 * @pdev: pci device pointer 161 * @id: pointer to table of device id/id's. 162 * 163 * Description: This probing function gets called for all PCI devices which 164 * match the ID table and are not "owned" by other driver yet. This function 165 * gets passed a "struct pci_dev *" for each device whose entry in the ID table 166 * matches the device. The probe functions returns zero when the driver choose 167 * to take "ownership" of the device or an error code(-ve no) otherwise. 168 */ 169 static int stmmac_pci_probe(struct pci_dev *pdev, 170 const struct pci_device_id *id) 171 { 172 struct stmmac_pci_info *info = (struct stmmac_pci_info *)id->driver_data; 173 struct plat_stmmacenet_data *plat; 174 struct stmmac_resources res; 175 int i; 176 int ret; 177 178 plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL); 179 if (!plat) 180 return -ENOMEM; 181 182 plat->mdio_bus_data = devm_kzalloc(&pdev->dev, 183 sizeof(*plat->mdio_bus_data), 184 GFP_KERNEL); 185 if (!plat->mdio_bus_data) 186 return -ENOMEM; 187 188 plat->dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*plat->dma_cfg), 189 GFP_KERNEL); 190 if (!plat->dma_cfg) 191 return -ENOMEM; 192 193 /* Enable pci device */ 194 ret = pcim_enable_device(pdev); 195 if (ret) { 196 dev_err(&pdev->dev, "%s: ERROR: failed to enable device\n", 197 __func__); 198 return ret; 199 } 200 201 /* Get the base address of device */ 202 for (i = 0; i <= PCI_STD_RESOURCE_END; i++) { 203 if (pci_resource_len(pdev, i) == 0) 204 continue; 205 ret = pcim_iomap_regions(pdev, BIT(i), pci_name(pdev)); 206 if (ret) 207 return ret; 208 break; 209 } 210 211 pci_set_master(pdev); 212 213 if (info) { 214 info->pdev = pdev; 215 if (info->setup) { 216 ret = info->setup(plat, info); 217 if (ret) 218 return ret; 219 } 220 } else 221 stmmac_default_data(plat); 222 223 pci_enable_msi(pdev); 224 225 memset(&res, 0, sizeof(res)); 226 res.addr = pcim_iomap_table(pdev)[i]; 227 res.wol_irq = pdev->irq; 228 res.irq = pdev->irq; 229 230 return stmmac_dvr_probe(&pdev->dev, plat, &res); 231 } 232 233 /** 234 * stmmac_pci_remove 235 * 236 * @pdev: platform device pointer 237 * Description: this function calls the main to free the net resources 238 * and releases the PCI resources. 239 */ 240 static void stmmac_pci_remove(struct pci_dev *pdev) 241 { 242 stmmac_dvr_remove(&pdev->dev); 243 } 244 245 static SIMPLE_DEV_PM_OPS(stmmac_pm_ops, stmmac_suspend, stmmac_resume); 246 247 #define STMMAC_VENDOR_ID 0x700 248 #define STMMAC_QUARK_ID 0x0937 249 #define STMMAC_DEVICE_ID 0x1108 250 251 static const struct pci_device_id stmmac_id_table[] = { 252 {PCI_DEVICE(STMMAC_VENDOR_ID, STMMAC_DEVICE_ID)}, 253 {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_MAC)}, 254 {PCI_VDEVICE(INTEL, STMMAC_QUARK_ID), (kernel_ulong_t)&quark_pci_info}, 255 {} 256 }; 257 258 MODULE_DEVICE_TABLE(pci, stmmac_id_table); 259 260 static struct pci_driver stmmac_pci_driver = { 261 .name = STMMAC_RESOURCE_NAME, 262 .id_table = stmmac_id_table, 263 .probe = stmmac_pci_probe, 264 .remove = stmmac_pci_remove, 265 .driver = { 266 .pm = &stmmac_pm_ops, 267 }, 268 }; 269 270 module_pci_driver(stmmac_pci_driver); 271 272 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PCI driver"); 273 MODULE_AUTHOR("Rayagond Kokatanur <rayagond.kokatanur@vayavyalabs.com>"); 274 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>"); 275 MODULE_LICENSE("GPL"); 276