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fe602838a6
Intel Denverton exposes the SPI serial flash controller as a PCI device instead of being part of the LPC chip as previous generations did. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Cyrille Pitchen <cyrille.pitchen@free-electrons.com>
83 lines
1.9 KiB
C
83 lines
1.9 KiB
C
/*
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* Intel PCH/PCU SPI flash PCI driver.
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*
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* Copyright (C) 2016, Intel Corporation
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* Author: Mika Westerberg <mika.westerberg@linux.intel.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/ioport.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include "intel-spi.h"
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#define BCR 0xdc
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#define BCR_WPD BIT(0)
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static const struct intel_spi_boardinfo bxt_info = {
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.type = INTEL_SPI_BXT,
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};
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static int intel_spi_pci_probe(struct pci_dev *pdev,
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const struct pci_device_id *id)
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{
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struct intel_spi_boardinfo *info;
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struct intel_spi *ispi;
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u32 bcr;
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int ret;
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ret = pcim_enable_device(pdev);
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if (ret)
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return ret;
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info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info),
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GFP_KERNEL);
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if (!info)
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return -ENOMEM;
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/* Try to make the chip read/write */
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pci_read_config_dword(pdev, BCR, &bcr);
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if (!(bcr & BCR_WPD)) {
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bcr |= BCR_WPD;
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pci_write_config_dword(pdev, BCR, bcr);
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pci_read_config_dword(pdev, BCR, &bcr);
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}
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info->writeable = !!(bcr & BCR_WPD);
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ispi = intel_spi_probe(&pdev->dev, &pdev->resource[0], info);
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if (IS_ERR(ispi))
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return PTR_ERR(ispi);
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pci_set_drvdata(pdev, ispi);
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return 0;
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}
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static void intel_spi_pci_remove(struct pci_dev *pdev)
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{
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intel_spi_remove(pci_get_drvdata(pdev));
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}
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static const struct pci_device_id intel_spi_pci_ids[] = {
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{ PCI_VDEVICE(INTEL, 0x19e0), (unsigned long)&bxt_info },
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{ },
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};
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MODULE_DEVICE_TABLE(pci, intel_spi_pci_ids);
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static struct pci_driver intel_spi_pci_driver = {
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.name = "intel-spi",
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.id_table = intel_spi_pci_ids,
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.probe = intel_spi_pci_probe,
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.remove = intel_spi_pci_remove,
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};
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module_pci_driver(intel_spi_pci_driver);
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MODULE_DESCRIPTION("Intel PCH/PCU SPI flash PCI driver");
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MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
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MODULE_LICENSE("GPL v2");
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