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 struct plat_stmmacenet_data plat_dat; 30 struct stmmac_mdio_bus_data mdio_data; 31 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 (!priv) { 104 pr_err("%s: main driver probe failed", __func__); 105 ret = -ENODEV; 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"); 196