pcie_quirks.c

  1// SPDX-License-Identifier: GPL-2.0-only
  2// NXP Wireless LAN device driver: PCIE and platform specific quirks
  3
  4#include <linux/dmi.h>
  5
  6#include "pcie_quirks.h"
  7
  8/* quirk table based on DMI matching */
  9static const struct dmi_system_id mwifiex_quirk_table[] = {
 10	{
 11		.ident = "Surface Pro 4",
 12		.matches = {
 13			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
 14			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface Pro 4"),
 15		},
 16		.driver_data = (void *)QUIRK_FW_RST_D3COLD,
 17	},
 18	{
 19		.ident = "Surface Pro 5",
 20		.matches = {
 21			/* match for SKU here due to generic product name "Surface Pro" */
 22			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
 23			DMI_EXACT_MATCH(DMI_PRODUCT_SKU, "Surface_Pro_1796"),
 24		},
 25		.driver_data = (void *)QUIRK_FW_RST_D3COLD,
 26	},
 27	{
 28		.ident = "Surface Pro 5 (LTE)",
 29		.matches = {
 30			/* match for SKU here due to generic product name "Surface Pro" */
 31			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
 32			DMI_EXACT_MATCH(DMI_PRODUCT_SKU, "Surface_Pro_1807"),
 33		},
 34		.driver_data = (void *)QUIRK_FW_RST_D3COLD,
 35	},
 36	{
 37		.ident = "Surface Pro 6",
 38		.matches = {
 39			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
 40			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface Pro 6"),
 41		},
 42		.driver_data = (void *)QUIRK_FW_RST_D3COLD,
 43	},
 44	{
 45		.ident = "Surface Book 1",
 46		.matches = {
 47			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
 48			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface Book"),
 49		},
 50		.driver_data = (void *)QUIRK_FW_RST_D3COLD,
 51	},
 52	{
 53		.ident = "Surface Book 2",
 54		.matches = {
 55			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
 56			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface Book 2"),
 57		},
 58		.driver_data = (void *)QUIRK_FW_RST_D3COLD,
 59	},
 60	{
 61		.ident = "Surface Laptop 1",
 62		.matches = {
 63			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
 64			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface Laptop"),
 65		},
 66		.driver_data = (void *)QUIRK_FW_RST_D3COLD,
 67	},
 68	{
 69		.ident = "Surface Laptop 2",
 70		.matches = {
 71			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
 72			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface Laptop 2"),
 73		},
 74		.driver_data = (void *)QUIRK_FW_RST_D3COLD,
 75	},
 76	{}
 77};
 78
 79void mwifiex_initialize_quirks(struct pcie_service_card *card)
 80{
 81	struct pci_dev *pdev = card->dev;
 82	const struct dmi_system_id *dmi_id;
 83
 84	dmi_id = dmi_first_match(mwifiex_quirk_table);
 85	if (dmi_id)
 86		card->quirks = (uintptr_t)dmi_id->driver_data;
 87
 88	if (!card->quirks)
 89		dev_info(&pdev->dev, "no quirks enabled\n");
 90	if (card->quirks & QUIRK_FW_RST_D3COLD)
 91		dev_info(&pdev->dev, "quirk reset_d3cold enabled\n");
 92}
 93
 94static void mwifiex_pcie_set_power_d3cold(struct pci_dev *pdev)
 95{
 96	dev_info(&pdev->dev, "putting into D3cold...\n");
 97
 98	pci_save_state(pdev);
 99	if (pci_is_enabled(pdev))
100		pci_disable_device(pdev);
101	pci_set_power_state(pdev, PCI_D3cold);
102}
103
104static int mwifiex_pcie_set_power_d0(struct pci_dev *pdev)
105{
106	int ret;
107
108	dev_info(&pdev->dev, "putting into D0...\n");
109
110	pci_set_power_state(pdev, PCI_D0);
111	ret = pci_enable_device(pdev);
112	if (ret) {
113		dev_err(&pdev->dev, "pci_enable_device failed\n");
114		return ret;
115	}
116	pci_restore_state(pdev);
117
118	return 0;
119}
120
121int mwifiex_pcie_reset_d3cold_quirk(struct pci_dev *pdev)
122{
123	struct pci_dev *parent_pdev = pci_upstream_bridge(pdev);
124	int ret;
125
126	/* Power-cycle (put into D3cold then D0) */
127	dev_info(&pdev->dev, "Using reset_d3cold quirk to perform FW reset\n");
128
129	/* We need to perform power-cycle also for bridge of wifi because
130	 * on some devices (e.g. Surface Book 1), the OS for some reasons
131	 * can't know the real power state of the bridge.
132	 * When tried to power-cycle only wifi, the reset failed with the
133	 * following dmesg log:
134	 * "Cannot transition to power state D0 for parent in D3hot".
135	 */
136	mwifiex_pcie_set_power_d3cold(pdev);
137	mwifiex_pcie_set_power_d3cold(parent_pdev);
138
139	ret = mwifiex_pcie_set_power_d0(parent_pdev);
140	if (ret)
141		return ret;
142	ret = mwifiex_pcie_set_power_d0(pdev);
143	if (ret)
144		return ret;
145
146	return 0;
147}