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 const struct intel_spi_boardinfo bxt_info = {
20	.type = INTEL_SPI_BXT,
21};
22
23static const struct intel_spi_boardinfo cnl_info = {
24	.type = INTEL_SPI_CNL,
25};
26
27static int intel_spi_pci_probe(struct pci_dev *pdev,
28			       const struct pci_device_id *id)
29{
30	struct intel_spi_boardinfo *info;
31	struct intel_spi *ispi;
32	u32 bcr;
33	int ret;
34
35	ret = pcim_enable_device(pdev);
36	if (ret)
37		return ret;
38
39	info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info),
40			    GFP_KERNEL);
41	if (!info)
42		return -ENOMEM;
43
44	/* Try to make the chip read/write */
45	pci_read_config_dword(pdev, BCR, &bcr);
46	if (!(bcr & BCR_WPD)) {
47		bcr |= BCR_WPD;
48		pci_write_config_dword(pdev, BCR, bcr);
49		pci_read_config_dword(pdev, BCR, &bcr);
50	}
51	info->writeable = !!(bcr & BCR_WPD);
52
53	ispi = intel_spi_probe(&pdev->dev, &pdev->resource[0], info);
54	if (IS_ERR(ispi))
55		return PTR_ERR(ispi);
56
57	pci_set_drvdata(pdev, ispi);
58	return 0;
59}
60
61static void intel_spi_pci_remove(struct pci_dev *pdev)
62{
63	intel_spi_remove(pci_get_drvdata(pdev));
64}
65
66static const struct pci_device_id intel_spi_pci_ids[] = {
67	{ PCI_VDEVICE(INTEL, 0x02a4), (unsigned long)&bxt_info },
68	{ PCI_VDEVICE(INTEL, 0x06a4), (unsigned long)&bxt_info },
69	{ PCI_VDEVICE(INTEL, 0x18e0), (unsigned long)&bxt_info },
70	{ PCI_VDEVICE(INTEL, 0x19e0), (unsigned long)&bxt_info },
71	{ PCI_VDEVICE(INTEL, 0x1bca), (unsigned long)&bxt_info },
72	{ PCI_VDEVICE(INTEL, 0x34a4), (unsigned long)&bxt_info },
73	{ PCI_VDEVICE(INTEL, 0x43a4), (unsigned long)&cnl_info },
74	{ PCI_VDEVICE(INTEL, 0x4b24), (unsigned long)&bxt_info },
75	{ PCI_VDEVICE(INTEL, 0x4da4), (unsigned long)&bxt_info },
76	{ PCI_VDEVICE(INTEL, 0x51a4), (unsigned long)&cnl_info },
77	{ PCI_VDEVICE(INTEL, 0x54a4), (unsigned long)&cnl_info },
78	{ PCI_VDEVICE(INTEL, 0x7aa4), (unsigned long)&cnl_info },
79	{ PCI_VDEVICE(INTEL, 0xa0a4), (unsigned long)&bxt_info },
80	{ PCI_VDEVICE(INTEL, 0xa1a4), (unsigned long)&bxt_info },
81	{ PCI_VDEVICE(INTEL, 0xa224), (unsigned long)&bxt_info },
82	{ PCI_VDEVICE(INTEL, 0xa324), (unsigned long)&cnl_info },
83	{ PCI_VDEVICE(INTEL, 0xa3a4), (unsigned long)&bxt_info },
84	{ },
85};
86MODULE_DEVICE_TABLE(pci, intel_spi_pci_ids);
87
88static struct pci_driver intel_spi_pci_driver = {
89	.name = "intel-spi",
90	.id_table = intel_spi_pci_ids,
91	.probe = intel_spi_pci_probe,
92	.remove = intel_spi_pci_remove,
93};
94
95module_pci_driver(intel_spi_pci_driver);
96
97MODULE_DESCRIPTION("Intel PCH/PCU SPI flash PCI driver");
98MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
99MODULE_LICENSE("GPL v2");