LXR linux/drivers/mtd/spi-nor/controllers/intel-spi-pci.c

   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, 0xa0a4), (unsigned long)&bxt_info },
  77        { PCI_VDEVICE(INTEL, 0xa1a4), (unsigned long)&bxt_info },
  78        { PCI_VDEVICE(INTEL, 0xa224), (unsigned long)&bxt_info },
  79        { PCI_VDEVICE(INTEL, 0xa324), (unsigned long)&cnl_info },
  80        { PCI_VDEVICE(INTEL, 0xa3a4), (unsigned long)&bxt_info },
  81        { },
  82};
  83MODULE_DEVICE_TABLE(pci, intel_spi_pci_ids);
  84
  85static struct pci_driver intel_spi_pci_driver = {
  86        .name = "intel-spi",
  87        .id_table = intel_spi_pci_ids,
  88        .probe = intel_spi_pci_probe,
  89        .remove = intel_spi_pci_remove,
  90};
  91
  92module_pci_driver(intel_spi_pci_driver);
  93
  94MODULE_DESCRIPTION("Intel PCH/PCU SPI flash PCI driver");
  95MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
  96MODULE_LICENSE("GPL v2");
  97