drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c

   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         /* TODO: AXI */
  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->fixed_burst = 1;
 119         /* AXI (TODO) */
 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         stmmac_dvr_remove(&pdev->dev);
 235 }
 236
 237 static SIMPLE_DEV_PM_OPS(stmmac_pm_ops, stmmac_suspend, stmmac_resume);
 238
 239 #define STMMAC_VENDOR_ID 0x700
 240 #define STMMAC_QUARK_ID  0x0937
 241 #define STMMAC_DEVICE_ID 0x1108
 242
 243 static const struct pci_device_id stmmac_id_table[] = {
 244         {PCI_DEVICE(STMMAC_VENDOR_ID, STMMAC_DEVICE_ID)},
 245         {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_MAC)},
 246         {PCI_VDEVICE(INTEL, STMMAC_QUARK_ID), (kernel_ulong_t)&quark_pci_info},
 247         {}
 248 };
 249
 250 MODULE_DEVICE_TABLE(pci, stmmac_id_table);
 251
 252 static struct pci_driver stmmac_pci_driver = {
 253         .name = STMMAC_RESOURCE_NAME,
 254         .id_table = stmmac_id_table,
 255         .probe = stmmac_pci_probe,
 256         .remove = stmmac_pci_remove,
 257         .driver         = {
 258                 .pm     = &stmmac_pm_ops,
 259         },
 260 };
 261
 262 module_pci_driver(stmmac_pci_driver);
 263
 264 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PCI driver");
 265 MODULE_AUTHOR("Rayagond Kokatanur <rayagond.kokatanur@vayavyalabs.com>");
 266 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
 267 MODULE_LICENSE("GPL");