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 "stmmac.h"
  28
  29 static struct plat_stmmacenet_data plat_dat;
  30 static struct stmmac_mdio_bus_data mdio_data;
  31 static struct stmmac_dma_cfg dma_cfg;
  32
  33 static void stmmac_default_data(void)
  34 {
  35         memset(&plat_dat, 0, sizeof(struct plat_stmmacenet_data));
  36         plat_dat.bus_id = 1;
  37         plat_dat.phy_addr = 0;
  38         plat_dat.interface = PHY_INTERFACE_MODE_GMII;
  39         plat_dat.clk_csr = 2;   /* clk_csr_i = 20-35MHz & MDC = clk_csr_i/16 */
  40         plat_dat.has_gmac = 1;
  41         plat_dat.force_sf_dma_mode = 1;
  42
  43         mdio_data.phy_reset = NULL;
  44         mdio_data.phy_mask = 0;
  45         plat_dat.mdio_bus_data = &mdio_data;
  46
  47         dma_cfg.pbl = 32;
  48         dma_cfg.burst_len = DMA_AXI_BLEN_256;
  49         plat_dat.dma_cfg = &dma_cfg;
  50 }
  51
  52 /**
  53  * stmmac_pci_probe
  54  *
  55  * @pdev: pci device pointer
  56  * @id: pointer to table of device id/id's.
  57  *
  58  * Description: This probing function gets called for all PCI devices which
  59  * match the ID table and are not "owned" by other driver yet. This function
  60  * gets passed a "struct pci_dev *" for each device whose entry in the ID table
  61  * matches the device. The probe functions returns zero when the driver choose
  62  * to take "ownership" of the device or an error code(-ve no) otherwise.
  63  */
  64 static int stmmac_pci_probe(struct pci_dev *pdev,
  65                             const struct pci_device_id *id)
  66 {
  67         int ret = 0;
  68         void __iomem *addr = NULL;
  69         struct stmmac_priv *priv = NULL;
  70         int i;
  71
  72         /* Enable pci device */
  73         ret = pci_enable_device(pdev);
  74         if (ret) {
  75                 pr_err("%s : ERROR: failed to enable %s device\n", __func__,
  76                        pci_name(pdev));
  77                 return ret;
  78         }
  79         if (pci_request_regions(pdev, STMMAC_RESOURCE_NAME)) {
  80                 pr_err("%s: ERROR: failed to get PCI region\n", __func__);
  81                 ret = -ENODEV;
  82                 goto err_out_req_reg_failed;
  83         }
  84
  85         /* Get the base address of device */
  86         for (i = 0; i <= 5; i++) {
  87                 if (pci_resource_len(pdev, i) == 0)
  88                         continue;
  89                 addr = pci_iomap(pdev, i, 0);
  90                 if (addr == NULL) {
  91                         pr_err("%s: ERROR: cannot map register memory aborting",
  92                                __func__);
  93                         ret = -EIO;
  94                         goto err_out_map_failed;
  95                 }
  96                 break;
  97         }
  98         pci_set_master(pdev);
  99
 100         stmmac_default_data();
 101
 102         priv = stmmac_dvr_probe(&(pdev->dev), &plat_dat, addr);
 103         if (IS_ERR(priv)) {
 104                 pr_err("%s: main driver probe failed", __func__);
 105                 ret = PTR_ERR(priv);
 106                 goto err_out;
 107         }
 108         priv->dev->irq = pdev->irq;
 109         priv->wol_irq = pdev->irq;
 110
 111         pci_set_drvdata(pdev, priv->dev);
 112
 113         pr_debug("STMMAC platform driver registration completed");
 114
 115         return 0;
 116
 117 err_out:
 118         pci_clear_master(pdev);
 119 err_out_map_failed:
 120         pci_release_regions(pdev);
 121 err_out_req_reg_failed:
 122         pci_disable_device(pdev);
 123
 124         return ret;
 125 }
 126
 127 /**
 128  * stmmac_pci_remove
 129  *
 130  * @pdev: platform device pointer
 131  * Description: this function calls the main to free the net resources
 132  * and releases the PCI resources.
 133  */
 134 static void stmmac_pci_remove(struct pci_dev *pdev)
 135 {
 136         struct net_device *ndev = pci_get_drvdata(pdev);
 137         struct stmmac_priv *priv = netdev_priv(ndev);
 138
 139         stmmac_dvr_remove(ndev);
 140
 141         pci_iounmap(pdev, priv->ioaddr);
 142         pci_release_regions(pdev);
 143         pci_disable_device(pdev);
 144 }
 145
 146 #ifdef CONFIG_PM
 147 static int stmmac_pci_suspend(struct pci_dev *pdev, pm_message_t state)
 148 {
 149         struct net_device *ndev = pci_get_drvdata(pdev);
 150         int ret;
 151
 152         ret = stmmac_suspend(ndev);
 153         pci_save_state(pdev);
 154         pci_set_power_state(pdev, pci_choose_state(pdev, state));
 155
 156         return ret;
 157 }
 158
 159 static int stmmac_pci_resume(struct pci_dev *pdev)
 160 {
 161         struct net_device *ndev = pci_get_drvdata(pdev);
 162
 163         pci_set_power_state(pdev, PCI_D0);
 164         pci_restore_state(pdev);
 165
 166         return stmmac_resume(ndev);
 167 }
 168 #endif
 169
 170 #define STMMAC_VENDOR_ID 0x700
 171 #define STMMAC_DEVICE_ID 0x1108
 172
 173 static DEFINE_PCI_DEVICE_TABLE(stmmac_id_table) = {
 174         {PCI_DEVICE(STMMAC_VENDOR_ID, STMMAC_DEVICE_ID)},
 175         {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_MAC)},
 176         {}
 177 };
 178
 179 MODULE_DEVICE_TABLE(pci, stmmac_id_table);
 180
 181 struct pci_driver stmmac_pci_driver = {
 182         .name = STMMAC_RESOURCE_NAME,
 183         .id_table = stmmac_id_table,
 184         .probe = stmmac_pci_probe,
 185         .remove = stmmac_pci_remove,
 186 #ifdef CONFIG_PM
 187         .suspend = stmmac_pci_suspend,
 188         .resume = stmmac_pci_resume,
 189 #endif
 190 };
 191
 192 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PCI driver");
 193 MODULE_AUTHOR("Rayagond Kokatanur <rayagond.kokatanur@vayavyalabs.com>");
 194 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
 195 MODULE_LICENSE("GPL");