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