1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Intel PCH/PCU SPI flash PCI driver.
4 *
5 * Copyright (C) 2016, Intel Corporation
6 * Author: Mika Westerberg <mika.westerberg@linux.intel.com>
7 */
8
9#include <linux/ioport.h>
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/pci.h>
13
14#include "intel-spi.h"
15
16#define BCR		0xdc
17#define BCR_WPD		BIT(0)
18
19static bool intel_spi_pci_set_writeable(void __iomem *base, void *data)
20{
21	struct pci_dev *pdev = data;
22	u32 bcr;
23
24	/* Try to make the chip read/write */
25	pci_read_config_dword(pdev, BCR, &bcr);
26	if (!(bcr & BCR_WPD)) {
27		bcr |= BCR_WPD;
28		pci_write_config_dword(pdev, BCR, bcr);
29		pci_read_config_dword(pdev, BCR, &bcr);
30	}
31
32	return bcr & BCR_WPD;
33}
34
35static const struct intel_spi_boardinfo bxt_info = {
36	.type = INTEL_SPI_BXT,
37	.set_writeable = intel_spi_pci_set_writeable,
38};
39
40static const struct intel_spi_boardinfo cnl_info = {
41	.type = INTEL_SPI_CNL,
42	.set_writeable = intel_spi_pci_set_writeable,
43};
44
45static int intel_spi_pci_probe(struct pci_dev *pdev,
46			       const struct pci_device_id *id)
47{
48	struct intel_spi_boardinfo *info;
49	struct intel_spi *ispi;
50	int ret;
51
52	ret = pcim_enable_device(pdev);
53	if (ret)
54		return ret;
55
56	info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info),
57			    GFP_KERNEL);
58	if (!info)
59		return -ENOMEM;
60
61	info->data = pdev;
62	ispi = intel_spi_probe(&pdev->dev, &pdev->resource[0], info);
63	if (IS_ERR(ispi))
64		return PTR_ERR(ispi);
65
66	pci_set_drvdata(pdev, ispi);
67	return 0;
68}
69
70static void intel_spi_pci_remove(struct pci_dev *pdev)
71{
72	intel_spi_remove(pci_get_drvdata(pdev));
73}
74
75static const struct pci_device_id intel_spi_pci_ids[] = {
76	{ PCI_VDEVICE(INTEL, 0x02a4), (unsigned long)&bxt_info },
77	{ PCI_VDEVICE(INTEL, 0x06a4), (unsigned long)&bxt_info },
78	{ PCI_VDEVICE(INTEL, 0x18e0), (unsigned long)&bxt_info },
79	{ PCI_VDEVICE(INTEL, 0x19e0), (unsigned long)&bxt_info },
80	{ PCI_VDEVICE(INTEL, 0x1bca), (unsigned long)&bxt_info },
81	{ PCI_VDEVICE(INTEL, 0x34a4), (unsigned long)&bxt_info },
82	{ PCI_VDEVICE(INTEL, 0x43a4), (unsigned long)&cnl_info },
83	{ PCI_VDEVICE(INTEL, 0x4b24), (unsigned long)&bxt_info },
84	{ PCI_VDEVICE(INTEL, 0x4da4), (unsigned long)&bxt_info },
85	{ PCI_VDEVICE(INTEL, 0x7aa4), (unsigned long)&cnl_info },
86	{ PCI_VDEVICE(INTEL, 0xa0a4), (unsigned long)&bxt_info },
87	{ PCI_VDEVICE(INTEL, 0xa1a4), (unsigned long)&bxt_info },
88	{ PCI_VDEVICE(INTEL, 0xa224), (unsigned long)&bxt_info },
89	{ PCI_VDEVICE(INTEL, 0xa324), (unsigned long)&cnl_info },
90	{ PCI_VDEVICE(INTEL, 0xa3a4), (unsigned long)&bxt_info },
91	{ },
92};
93MODULE_DEVICE_TABLE(pci, intel_spi_pci_ids);
94
95static struct pci_driver intel_spi_pci_driver = {
96	.name = "intel-spi",
97	.id_table = intel_spi_pci_ids,
98	.probe = intel_spi_pci_probe,
99	.remove = intel_spi_pci_remove,
100};
101
102module_pci_driver(intel_spi_pci_driver);
103
104MODULE_DESCRIPTION("Intel PCH/PCU SPI flash PCI driver");
105MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
106MODULE_LICENSE("GPL v2");
107