1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Intel PCH/PCU SPI flash PCI driver.
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2016, Intel Corporation
6*4882a593Smuzhiyun * Author: Mika Westerberg <mika.westerberg@linux.intel.com>
7*4882a593Smuzhiyun */
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #include <linux/ioport.h>
10*4882a593Smuzhiyun #include <linux/kernel.h>
11*4882a593Smuzhiyun #include <linux/module.h>
12*4882a593Smuzhiyun #include <linux/pci.h>
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun #include "intel-spi.h"
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #define BCR 0xdc
17*4882a593Smuzhiyun #define BCR_WPD BIT(0)
18*4882a593Smuzhiyun
intel_spi_pci_set_writeable(void __iomem * base,void * data)19*4882a593Smuzhiyun static bool intel_spi_pci_set_writeable(void __iomem *base, void *data)
20*4882a593Smuzhiyun {
21*4882a593Smuzhiyun struct pci_dev *pdev = data;
22*4882a593Smuzhiyun u32 bcr;
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun /* Try to make the chip read/write */
25*4882a593Smuzhiyun pci_read_config_dword(pdev, BCR, &bcr);
26*4882a593Smuzhiyun if (!(bcr & BCR_WPD)) {
27*4882a593Smuzhiyun bcr |= BCR_WPD;
28*4882a593Smuzhiyun pci_write_config_dword(pdev, BCR, bcr);
29*4882a593Smuzhiyun pci_read_config_dword(pdev, BCR, &bcr);
30*4882a593Smuzhiyun }
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun return bcr & BCR_WPD;
33*4882a593Smuzhiyun }
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun static const struct intel_spi_boardinfo bxt_info = {
36*4882a593Smuzhiyun .type = INTEL_SPI_BXT,
37*4882a593Smuzhiyun .set_writeable = intel_spi_pci_set_writeable,
38*4882a593Smuzhiyun };
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun static const struct intel_spi_boardinfo cnl_info = {
41*4882a593Smuzhiyun .type = INTEL_SPI_CNL,
42*4882a593Smuzhiyun .set_writeable = intel_spi_pci_set_writeable,
43*4882a593Smuzhiyun };
44*4882a593Smuzhiyun
intel_spi_pci_probe(struct pci_dev * pdev,const struct pci_device_id * id)45*4882a593Smuzhiyun static int intel_spi_pci_probe(struct pci_dev *pdev,
46*4882a593Smuzhiyun const struct pci_device_id *id)
47*4882a593Smuzhiyun {
48*4882a593Smuzhiyun struct intel_spi_boardinfo *info;
49*4882a593Smuzhiyun struct intel_spi *ispi;
50*4882a593Smuzhiyun int ret;
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun ret = pcim_enable_device(pdev);
53*4882a593Smuzhiyun if (ret)
54*4882a593Smuzhiyun return ret;
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info),
57*4882a593Smuzhiyun GFP_KERNEL);
58*4882a593Smuzhiyun if (!info)
59*4882a593Smuzhiyun return -ENOMEM;
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun info->data = pdev;
62*4882a593Smuzhiyun ispi = intel_spi_probe(&pdev->dev, &pdev->resource[0], info);
63*4882a593Smuzhiyun if (IS_ERR(ispi))
64*4882a593Smuzhiyun return PTR_ERR(ispi);
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun pci_set_drvdata(pdev, ispi);
67*4882a593Smuzhiyun return 0;
68*4882a593Smuzhiyun }
69*4882a593Smuzhiyun
intel_spi_pci_remove(struct pci_dev * pdev)70*4882a593Smuzhiyun static void intel_spi_pci_remove(struct pci_dev *pdev)
71*4882a593Smuzhiyun {
72*4882a593Smuzhiyun intel_spi_remove(pci_get_drvdata(pdev));
73*4882a593Smuzhiyun }
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun static const struct pci_device_id intel_spi_pci_ids[] = {
76*4882a593Smuzhiyun { PCI_VDEVICE(INTEL, 0x02a4), (unsigned long)&bxt_info },
77*4882a593Smuzhiyun { PCI_VDEVICE(INTEL, 0x06a4), (unsigned long)&bxt_info },
78*4882a593Smuzhiyun { PCI_VDEVICE(INTEL, 0x18e0), (unsigned long)&bxt_info },
79*4882a593Smuzhiyun { PCI_VDEVICE(INTEL, 0x19e0), (unsigned long)&bxt_info },
80*4882a593Smuzhiyun { PCI_VDEVICE(INTEL, 0x1bca), (unsigned long)&bxt_info },
81*4882a593Smuzhiyun { PCI_VDEVICE(INTEL, 0x34a4), (unsigned long)&bxt_info },
82*4882a593Smuzhiyun { PCI_VDEVICE(INTEL, 0x43a4), (unsigned long)&cnl_info },
83*4882a593Smuzhiyun { PCI_VDEVICE(INTEL, 0x4b24), (unsigned long)&bxt_info },
84*4882a593Smuzhiyun { PCI_VDEVICE(INTEL, 0x4da4), (unsigned long)&bxt_info },
85*4882a593Smuzhiyun { PCI_VDEVICE(INTEL, 0x7aa4), (unsigned long)&cnl_info },
86*4882a593Smuzhiyun { PCI_VDEVICE(INTEL, 0xa0a4), (unsigned long)&bxt_info },
87*4882a593Smuzhiyun { PCI_VDEVICE(INTEL, 0xa1a4), (unsigned long)&bxt_info },
88*4882a593Smuzhiyun { PCI_VDEVICE(INTEL, 0xa224), (unsigned long)&bxt_info },
89*4882a593Smuzhiyun { PCI_VDEVICE(INTEL, 0xa324), (unsigned long)&cnl_info },
90*4882a593Smuzhiyun { PCI_VDEVICE(INTEL, 0xa3a4), (unsigned long)&bxt_info },
91*4882a593Smuzhiyun { },
92*4882a593Smuzhiyun };
93*4882a593Smuzhiyun MODULE_DEVICE_TABLE(pci, intel_spi_pci_ids);
94*4882a593Smuzhiyun
95*4882a593Smuzhiyun static struct pci_driver intel_spi_pci_driver = {
96*4882a593Smuzhiyun .name = "intel-spi",
97*4882a593Smuzhiyun .id_table = intel_spi_pci_ids,
98*4882a593Smuzhiyun .probe = intel_spi_pci_probe,
99*4882a593Smuzhiyun .remove = intel_spi_pci_remove,
100*4882a593Smuzhiyun };
101*4882a593Smuzhiyun
102*4882a593Smuzhiyun module_pci_driver(intel_spi_pci_driver);
103*4882a593Smuzhiyun
104*4882a593Smuzhiyun MODULE_DESCRIPTION("Intel PCH/PCU SPI flash PCI driver");
105*4882a593Smuzhiyun MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
106*4882a593Smuzhiyun MODULE_LICENSE("GPL v2");
107