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 link_ctrl_reg;
  20
  21         pcie_capability_read_word(priv->pdev, PCI_EXP_LNKCTL, &link_ctrl_reg);
  22
  23         pci_read_config_byte(pdev, 0x98, &tmp);
  24         tmp |= BIT(4);
  25         pci_write_config_byte(pdev, 0x98, tmp);
  26
  27         tmp = 0x17;
  28         pci_write_config_byte(pdev, 0x70f, tmp);
  29 }
  30
  31 bool rtl92e_check_adapter(struct pci_dev *pdev, struct net_device *dev)
  32 {
  33         struct r8192_priv *priv = (struct r8192_priv *)rtllib_priv(dev);
  34         u16 device_id;
  35         u8  revision_id;
  36         u16 irq_line;
  37
  38         device_id = pdev->device;
  39         revision_id = pdev->revision;
  40         pci_read_config_word(pdev, 0x3C, &irq_line);
  41
  42         priv->card_8192 = NIC_8192E;
  43
  44         if (device_id == 0x8192) {
  45                 switch (revision_id) {
  46                 case HAL_HW_PCI_REVISION_ID_8192PCIE:
  47                         dev_info(&pdev->dev,
  48                                  "Adapter(8192 PCI-E) is found - DeviceID=%x\n",
  49                                  device_id);
  50                         priv->card_8192 = NIC_8192E;
  51                         break;
  52                 case HAL_HW_PCI_REVISION_ID_8192SE:
  53                         dev_info(&pdev->dev,
  54                                  "Adapter(8192SE) is found - DeviceID=%x\n",
  55                                  device_id);
  56                         priv->card_8192 = NIC_8192SE;
  57                         break;
  58                 default:
  59                         dev_info(&pdev->dev,
  60                                  "UNKNOWN nic type(%4x:%4x)\n",
  61                                  pdev->vendor, pdev->device);
  62                         priv->card_8192 = NIC_UNKNOWN;
  63                         return false;
  64                 }
  65         }
  66
  67         if (priv->card_8192 != NIC_8192E) {
  68                 dev_info(&pdev->dev,
  69                          "Detect info(%x) and hardware info(%x) not match!\n",
  70                          NIC_8192E, priv->card_8192);
  71                 dev_info(&pdev->dev,
  72                          "Please select proper driver before install!!!!\n");
  73                 return false;
  74         }
  75
  76         _rtl92e_parse_pci_configuration(pdev, dev);
  77
  78         return true;
  79 }