forked from mirrors/linux
b50a1e1f3c
Let's use the pci/platform-specialized functions for mapping a resource,
and pass the mapped address to intel_spi_probe. Benefits are:
- No separate call needed for getting the resource, and no access to
struct pci_dev internals (pdev->resource[]).
- More user-friendly output in /proc/iomem. In my case:
before
80704000-80704fff : 0000:00:1f.5
80704000-80704fff : 0000:00:1f.5 0000:00:1f.5
after
80704000-80704fff : 0000:00:1f.5
80704000-80704fff : spi_intel_pci
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://patch.msgid.link/2585fa05-60c4-48c4-a838-e87014665ae2@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
112 lines
3.5 KiB
C
112 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Intel PCH/PCU SPI flash PCI driver.
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*
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* Copyright (C) 2016 - 2022, Intel Corporation
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* Author: Mika Westerberg <mika.westerberg@linux.intel.com>
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*/
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#include <linux/module.h>
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#include <linux/pci.h>
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#include "spi-intel.h"
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#define BCR 0xdc
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#define BCR_WPD BIT(0)
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static bool intel_spi_pci_set_writeable(void __iomem *base, void *data)
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{
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struct pci_dev *pdev = data;
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u32 bcr;
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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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return bcr & BCR_WPD;
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}
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static const struct intel_spi_boardinfo bxt_info = {
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.type = INTEL_SPI_BXT,
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.set_writeable = intel_spi_pci_set_writeable,
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};
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static const struct intel_spi_boardinfo cnl_info = {
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.type = INTEL_SPI_CNL,
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.set_writeable = intel_spi_pci_set_writeable,
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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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void __iomem *base;
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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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info->data = pdev;
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base = pcim_iomap_region(pdev, 0, KBUILD_MODNAME);
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if (IS_ERR(base))
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return PTR_ERR(base);
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return intel_spi_probe(&pdev->dev, base, info);
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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, 0x02a4), (unsigned long)&cnl_info },
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{ PCI_VDEVICE(INTEL, 0x06a4), (unsigned long)&cnl_info },
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{ PCI_VDEVICE(INTEL, 0x18e0), (unsigned long)&bxt_info },
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{ PCI_VDEVICE(INTEL, 0x19e0), (unsigned long)&bxt_info },
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{ PCI_VDEVICE(INTEL, 0x1bca), (unsigned long)&bxt_info },
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{ PCI_VDEVICE(INTEL, 0x34a4), (unsigned long)&cnl_info },
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{ PCI_VDEVICE(INTEL, 0x38a4), (unsigned long)&bxt_info },
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{ PCI_VDEVICE(INTEL, 0x43a4), (unsigned long)&cnl_info },
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{ PCI_VDEVICE(INTEL, 0x4b24), (unsigned long)&bxt_info },
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{ PCI_VDEVICE(INTEL, 0x4da4), (unsigned long)&bxt_info },
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{ PCI_VDEVICE(INTEL, 0x51a4), (unsigned long)&cnl_info },
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{ PCI_VDEVICE(INTEL, 0x54a4), (unsigned long)&cnl_info },
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{ PCI_VDEVICE(INTEL, 0x5794), (unsigned long)&cnl_info },
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{ PCI_VDEVICE(INTEL, 0x7a24), (unsigned long)&cnl_info },
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{ PCI_VDEVICE(INTEL, 0x7aa4), (unsigned long)&cnl_info },
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{ PCI_VDEVICE(INTEL, 0x7e23), (unsigned long)&cnl_info },
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{ PCI_VDEVICE(INTEL, 0x7f24), (unsigned long)&cnl_info },
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{ PCI_VDEVICE(INTEL, 0x9d24), (unsigned long)&cnl_info },
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{ PCI_VDEVICE(INTEL, 0x9da4), (unsigned long)&cnl_info },
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{ PCI_VDEVICE(INTEL, 0xa0a4), (unsigned long)&cnl_info },
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{ PCI_VDEVICE(INTEL, 0xa1a4), (unsigned long)&bxt_info },
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{ PCI_VDEVICE(INTEL, 0xa224), (unsigned long)&bxt_info },
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{ PCI_VDEVICE(INTEL, 0xa2a4), (unsigned long)&cnl_info },
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{ PCI_VDEVICE(INTEL, 0xa324), (unsigned long)&cnl_info },
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{ PCI_VDEVICE(INTEL, 0xa3a4), (unsigned long)&cnl_info },
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{ PCI_VDEVICE(INTEL, 0xa823), (unsigned long)&cnl_info },
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{ PCI_VDEVICE(INTEL, 0xe323), (unsigned long)&cnl_info },
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{ PCI_VDEVICE(INTEL, 0xe423), (unsigned long)&cnl_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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.dev_groups = intel_spi_groups,
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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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