drivers/staging/rtl8192e/rtl8192e/rtl_pci.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright(c) 2008 - 2010 Realtek Corporation. All rights reserved.
   4  *
   5  * Based on the r8180 driver, which is:
   6  * Copyright 2004-2005 Andrea Merello <andrea.merello@gmail.com>, et al.
   7  *
   8  * Contact Information: wlanfae <wlanfae@realtek.com>
   9  */
  10 #include "rtl_pci.h"
  11 #include "rtl_core.h"
  12
  13 static void _rtl92e_parse_pci_configuration(struct pci_dev *pdev,
  14                                             struct net_device *dev)
  15 {
  16         struct r8192_priv *priv = (struct r8192_priv *)rtllib_priv(dev);
  17
  18         u8 tmp;
  19         u16 LinkCtrlReg;
  20
  21         pcie_capability_read_word(priv->pdev, PCI_EXP_LNKCTL, &LinkCtrlReg);
  22
  23         RT_TRACE(COMP_INIT, "Link Control Register =%x\n", LinkCtrlReg);
  24
  25         pci_read_config_byte(pdev, 0x98, &tmp);
  26         tmp |= BIT4;
  27         pci_write_config_byte(pdev, 0x98, tmp);
  28
  29         tmp = 0x17;
  30         pci_write_config_byte(pdev, 0x70f, tmp);
  31 }
  32
  33 bool rtl92e_check_adapter(struct pci_dev *pdev, struct net_device *dev)
  34 {
  35         struct r8192_priv *priv = (struct r8192_priv *)rtllib_priv(dev);
  36         u16 DeviceID;
  37         u8  RevisionID;
  38         u16 IrqLine;
  39
  40         DeviceID = pdev->device;
  41         RevisionID = pdev->revision;
  42         pci_read_config_word(pdev, 0x3C, &IrqLine);
  43
  44         priv->card_8192 = priv->ops->nic_type;
  45
  46         if (DeviceID == 0x8192) {
  47                 switch (RevisionID) {
  48                 case HAL_HW_PCI_REVISION_ID_8192PCIE:
  49                         dev_info(&pdev->dev,
  50                                  "Adapter(8192 PCI-E) is found - DeviceID=%x\n",
  51                                  DeviceID);
  52                         priv->card_8192 = NIC_8192E;
  53                         break;
  54                 case HAL_HW_PCI_REVISION_ID_8192SE:
  55                         dev_info(&pdev->dev,
  56                                  "Adapter(8192SE) is found - DeviceID=%x\n",
  57                                  DeviceID);
  58                         priv->card_8192 = NIC_8192SE;
  59                         break;
  60                 default:
  61                         dev_info(&pdev->dev,
  62                                  "UNKNOWN nic type(%4x:%4x)\n",
  63                                  pdev->vendor, pdev->device);
  64                         priv->card_8192 = NIC_UNKNOWN;
  65                         return false;
  66                 }
  67         }
  68
  69         if (priv->ops->nic_type != priv->card_8192) {
  70                 dev_info(&pdev->dev,
  71                          "Detect info(%x) and hardware info(%x) not match!\n",
  72                          priv->ops->nic_type, priv->card_8192);
  73                 dev_info(&pdev->dev,
  74                          "Please select proper driver before install!!!!\n");
  75                 return false;
  76         }
  77
  78         _rtl92e_parse_pci_configuration(pdev, dev);
  79
  80         return true;
  81 }