86 lines
2.1 KiB
C
86 lines
2.1 KiB
C
/*
|
|
* Intel PCH/PCU SPI flash PCI driver.
|
|
*
|
|
* Copyright (C) 2016, Intel Corporation
|
|
* Author: Mika Westerberg <mika.westerberg@linux.intel.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/ioport.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/pci.h>
|
|
|
|
#include "intel-spi.h"
|
|
|
|
#define BCR 0xdc
|
|
#define BCR_WPD BIT(0)
|
|
|
|
static const struct intel_spi_boardinfo bxt_info = {
|
|
.type = INTEL_SPI_BXT,
|
|
};
|
|
|
|
static int intel_spi_pci_probe(struct pci_dev *pdev,
|
|
const struct pci_device_id *id)
|
|
{
|
|
struct intel_spi_boardinfo *info;
|
|
struct intel_spi *ispi;
|
|
u32 bcr;
|
|
int ret;
|
|
|
|
ret = pcim_enable_device(pdev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info),
|
|
GFP_KERNEL);
|
|
if (!info)
|
|
return -ENOMEM;
|
|
|
|
/* Try to make the chip read/write */
|
|
pci_read_config_dword(pdev, BCR, &bcr);
|
|
if (!(bcr & BCR_WPD)) {
|
|
bcr |= BCR_WPD;
|
|
pci_write_config_dword(pdev, BCR, bcr);
|
|
pci_read_config_dword(pdev, BCR, &bcr);
|
|
}
|
|
info->writeable = !!(bcr & BCR_WPD);
|
|
|
|
ispi = intel_spi_probe(&pdev->dev, &pdev->resource[0], info);
|
|
if (IS_ERR(ispi))
|
|
return PTR_ERR(ispi);
|
|
|
|
pci_set_drvdata(pdev, ispi);
|
|
return 0;
|
|
}
|
|
|
|
static void intel_spi_pci_remove(struct pci_dev *pdev)
|
|
{
|
|
intel_spi_remove(pci_get_drvdata(pdev));
|
|
}
|
|
|
|
static const struct pci_device_id intel_spi_pci_ids[] = {
|
|
{ PCI_VDEVICE(INTEL, 0x18e0), (unsigned long)&bxt_info },
|
|
{ PCI_VDEVICE(INTEL, 0x19e0), (unsigned long)&bxt_info },
|
|
{ PCI_VDEVICE(INTEL, 0xa1a4), (unsigned long)&bxt_info },
|
|
{ PCI_VDEVICE(INTEL, 0xa224), (unsigned long)&bxt_info },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(pci, intel_spi_pci_ids);
|
|
|
|
static struct pci_driver intel_spi_pci_driver = {
|
|
.name = "intel-spi",
|
|
.id_table = intel_spi_pci_ids,
|
|
.probe = intel_spi_pci_probe,
|
|
.remove = intel_spi_pci_remove,
|
|
};
|
|
|
|
module_pci_driver(intel_spi_pci_driver);
|
|
|
|
MODULE_DESCRIPTION("Intel PCH/PCU SPI flash PCI driver");
|
|
MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
|
|
MODULE_LICENSE("GPL v2");
|