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