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
13static 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
31bool 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}
80