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// SPDX-License-Identifier: GPL-2.0-only
/*
* Intel PCH/PCU SPI flash PCI driver.
*
* Copyright (C) 2016 - 2022, Intel Corporation
* Author: Mika Westerberg <mika.westerberg@linux.intel.com>
*/
#include <linux/module.h>
#include <linux/pci.h>
#include "spi-intel.h"
#define BCR 0xdc
#define BCR_WPD BIT(0)
static bool intel_spi_pci_set_writeable(void __iomem *base, void *data)
{
struct pci_dev *pdev = data;
u32 bcr;
/* 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);
}
return bcr & BCR_WPD;
}
static const struct intel_spi_boardinfo bxt_info = {
.type = INTEL_SPI_BXT,
.set_writeable = intel_spi_pci_set_writeable,
};
static const struct intel_spi_boardinfo cnl_info = {
.type = INTEL_SPI_CNL,
.set_writeable = intel_spi_pci_set_writeable,
};
static int intel_spi_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
struct intel_spi_boardinfo *info;
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;
info->data = pdev;
return intel_spi_probe(&pdev->dev, &pdev->resource[0], info);
}
static const struct pci_device_id intel_spi_pci_ids[] = {
{ PCI_VDEVICE(INTEL, 0x02a4), (unsigned long)&bxt_info },
{ PCI_VDEVICE(INTEL, 0x06a4), (unsigned long)&bxt_info },
{ PCI_VDEVICE(INTEL, 0x18e0), (unsigned long)&bxt_info },
{ PCI_VDEVICE(INTEL, 0x19e0), (unsigned long)&bxt_info },
{ PCI_VDEVICE(INTEL, 0x1bca), (unsigned long)&bxt_info },
{ PCI_VDEVICE(INTEL, 0x34a4), (unsigned long)&bxt_info },
{ PCI_VDEVICE(INTEL, 0x38a4), (unsigned long)&bxt_info },
{ PCI_VDEVICE(INTEL, 0x43a4), (unsigned long)&cnl_info },
{ PCI_VDEVICE(INTEL, 0x4b24), (unsigned long)&bxt_info },
{ PCI_VDEVICE(INTEL, 0x4da4), (unsigned long)&bxt_info },
{ PCI_VDEVICE(INTEL, 0x51a4), (unsigned long)&cnl_info },
{ PCI_VDEVICE(INTEL, 0x54a4), (unsigned long)&cnl_info },
{ PCI_VDEVICE(INTEL, 0x7aa4), (unsigned long)&cnl_info },
{ PCI_VDEVICE(INTEL, 0xa0a4), (unsigned long)&bxt_info },
{ PCI_VDEVICE(INTEL, 0xa1a4), (unsigned long)&bxt_info },
{ PCI_VDEVICE(INTEL, 0xa224), (unsigned long)&bxt_info },
{ PCI_VDEVICE(INTEL, 0xa324), (unsigned long)&cnl_info },
{ PCI_VDEVICE(INTEL, 0xa3a4), (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,
};
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");
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