1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Intel PCH/PCU SPI flash PCI driver.
 4 *
 5 * Copyright (C) 2016 - 2022, Intel Corporation
 6 * Author: Mika Westerberg <mika.westerberg@linux.intel.com>
 7 */
 8
 9#include <linux/module.h>
10#include <linux/pci.h>
11
12#include "spi-intel.h"
13
14#define BCR		0xdc
15#define BCR_WPD		BIT(0)
16
17static bool intel_spi_pci_set_writeable(void __iomem *base, void *data)
18{
19	struct pci_dev *pdev = data;
20	u32 bcr;
21
22	/* Try to make the chip read/write */
23	pci_read_config_dword(pdev, BCR, &bcr);
24	if (!(bcr & BCR_WPD)) {
25		bcr |= BCR_WPD;
26		pci_write_config_dword(pdev, BCR, bcr);
27		pci_read_config_dword(pdev, BCR, &bcr);
28	}
29
30	return bcr & BCR_WPD;
31}
32
33static const struct intel_spi_boardinfo bxt_info = {
34	.type = INTEL_SPI_BXT,
35	.set_writeable = intel_spi_pci_set_writeable,
36};
37
38static const struct intel_spi_boardinfo cnl_info = {
39	.type = INTEL_SPI_CNL,
40	.set_writeable = intel_spi_pci_set_writeable,
41};
42
43static int intel_spi_pci_probe(struct pci_dev *pdev,
44			       const struct pci_device_id *id)
45{
46	struct intel_spi_boardinfo *info;
47	int ret;
48
49	ret = pcim_enable_device(pdev);
50	if (ret)
51		return ret;
52
53	info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info),
54			    GFP_KERNEL);
55	if (!info)
56		return -ENOMEM;
57
58	info->data = pdev;
59	return intel_spi_probe(&pdev->dev, &pdev->resource[0], info);
60}
61
62static const struct pci_device_id intel_spi_pci_ids[] = {
63	{ PCI_VDEVICE(INTEL, 0x02a4), (unsigned long)&bxt_info },
64	{ PCI_VDEVICE(INTEL, 0x06a4), (unsigned long)&bxt_info },
65	{ PCI_VDEVICE(INTEL, 0x18e0), (unsigned long)&bxt_info },
66	{ PCI_VDEVICE(INTEL, 0x19e0), (unsigned long)&bxt_info },
67	{ PCI_VDEVICE(INTEL, 0x1bca), (unsigned long)&bxt_info },
68	{ PCI_VDEVICE(INTEL, 0x34a4), (unsigned long)&bxt_info },
69	{ PCI_VDEVICE(INTEL, 0x38a4), (unsigned long)&bxt_info },
70	{ PCI_VDEVICE(INTEL, 0x43a4), (unsigned long)&cnl_info },
71	{ PCI_VDEVICE(INTEL, 0x4b24), (unsigned long)&bxt_info },
72	{ PCI_VDEVICE(INTEL, 0x4da4), (unsigned long)&bxt_info },
73	{ PCI_VDEVICE(INTEL, 0x51a4), (unsigned long)&cnl_info },
74	{ PCI_VDEVICE(INTEL, 0x54a4), (unsigned long)&cnl_info },
75	{ PCI_VDEVICE(INTEL, 0x7a24), (unsigned long)&cnl_info },
76	{ PCI_VDEVICE(INTEL, 0x7aa4), (unsigned long)&cnl_info },
77	{ PCI_VDEVICE(INTEL, 0x7e23), (unsigned long)&cnl_info },
78	{ PCI_VDEVICE(INTEL, 0xa0a4), (unsigned long)&bxt_info },
79	{ PCI_VDEVICE(INTEL, 0xa1a4), (unsigned long)&bxt_info },
80	{ PCI_VDEVICE(INTEL, 0xa224), (unsigned long)&bxt_info },
81	{ PCI_VDEVICE(INTEL, 0xa324), (unsigned long)&cnl_info },
82	{ PCI_VDEVICE(INTEL, 0xa3a4), (unsigned long)&bxt_info },
83	{ },
84};
85MODULE_DEVICE_TABLE(pci, intel_spi_pci_ids);
86
87static struct pci_driver intel_spi_pci_driver = {
88	.name = "intel-spi",
89	.id_table = intel_spi_pci_ids,
90	.probe = intel_spi_pci_probe,
91};
92
93module_pci_driver(intel_spi_pci_driver);
94
95MODULE_DESCRIPTION("Intel PCH/PCU SPI flash PCI driver");
96MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
97MODULE_LICENSE("GPL v2");