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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Intel PCH/PCU SPI flash PCI driver.4 *5 * Copyright (C) 2016 - 2022, Intel Corporation6 * Author: Mika Westerberg <mika.westerberg@linux.intel.com>7 */8 9#include <linux/module.h>10#include <linux/pci.h>11 12#include "spi-intel.h"13 14#define BCR 0xdc15#define BCR_WPD BIT(0)16 17static bool intel_spi_pci_set_writeable(void __iomem *base, void *data)18{19 struct pci_dev *pdev = data;20 u32 bcr;21 22 /* Try to make the chip read/write */23 pci_read_config_dword(pdev, BCR, &bcr);24 if (!(bcr & BCR_WPD)) {25 bcr |= BCR_WPD;26 pci_write_config_dword(pdev, BCR, bcr);27 pci_read_config_dword(pdev, BCR, &bcr);28 }29 30 return bcr & BCR_WPD;31}32 33static const struct intel_spi_boardinfo bxt_info = {34 .type = INTEL_SPI_BXT,35 .set_writeable = intel_spi_pci_set_writeable,36};37 38static const struct intel_spi_boardinfo cnl_info = {39 .type = INTEL_SPI_CNL,40 .set_writeable = intel_spi_pci_set_writeable,41};42 43static int intel_spi_pci_probe(struct pci_dev *pdev,44 const struct pci_device_id *id)45{46 struct intel_spi_boardinfo *info;47 int ret;48 49 ret = pcim_enable_device(pdev);50 if (ret)51 return ret;52 53 info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info),54 GFP_KERNEL);55 if (!info)56 return -ENOMEM;57 58 info->data = pdev;59 return intel_spi_probe(&pdev->dev, &pdev->resource[0], info);60}61 62static const struct pci_device_id intel_spi_pci_ids[] = {63 { PCI_VDEVICE(INTEL, 0x02a4), (unsigned long)&cnl_info },64 { PCI_VDEVICE(INTEL, 0x06a4), (unsigned long)&cnl_info },65 { PCI_VDEVICE(INTEL, 0x18e0), (unsigned long)&bxt_info },66 { PCI_VDEVICE(INTEL, 0x19e0), (unsigned long)&bxt_info },67 { PCI_VDEVICE(INTEL, 0x1bca), (unsigned long)&bxt_info },68 { PCI_VDEVICE(INTEL, 0x34a4), (unsigned long)&cnl_info },69 { PCI_VDEVICE(INTEL, 0x38a4), (unsigned long)&bxt_info },70 { PCI_VDEVICE(INTEL, 0x43a4), (unsigned long)&cnl_info },71 { PCI_VDEVICE(INTEL, 0x4b24), (unsigned long)&bxt_info },72 { PCI_VDEVICE(INTEL, 0x4da4), (unsigned long)&bxt_info },73 { PCI_VDEVICE(INTEL, 0x51a4), (unsigned long)&cnl_info },74 { PCI_VDEVICE(INTEL, 0x54a4), (unsigned long)&cnl_info },75 { PCI_VDEVICE(INTEL, 0x5794), (unsigned long)&cnl_info },76 { PCI_VDEVICE(INTEL, 0x7a24), (unsigned long)&cnl_info },77 { PCI_VDEVICE(INTEL, 0x7aa4), (unsigned long)&cnl_info },78 { PCI_VDEVICE(INTEL, 0x7e23), (unsigned long)&cnl_info },79 { PCI_VDEVICE(INTEL, 0x7f24), (unsigned long)&cnl_info },80 { PCI_VDEVICE(INTEL, 0x9d24), (unsigned long)&cnl_info },81 { PCI_VDEVICE(INTEL, 0x9da4), (unsigned long)&cnl_info },82 { PCI_VDEVICE(INTEL, 0xa0a4), (unsigned long)&cnl_info },83 { PCI_VDEVICE(INTEL, 0xa1a4), (unsigned long)&bxt_info },84 { PCI_VDEVICE(INTEL, 0xa224), (unsigned long)&bxt_info },85 { PCI_VDEVICE(INTEL, 0xa2a4), (unsigned long)&cnl_info },86 { PCI_VDEVICE(INTEL, 0xa324), (unsigned long)&cnl_info },87 { PCI_VDEVICE(INTEL, 0xa3a4), (unsigned long)&cnl_info },88 { PCI_VDEVICE(INTEL, 0xa823), (unsigned long)&cnl_info },89 { },90};91MODULE_DEVICE_TABLE(pci, intel_spi_pci_ids);92 93static struct pci_driver intel_spi_pci_driver = {94 .name = "intel-spi",95 .id_table = intel_spi_pci_ids,96 .probe = intel_spi_pci_probe,97};98 99module_pci_driver(intel_spi_pci_driver);100 101MODULE_DESCRIPTION("Intel PCH/PCU SPI flash PCI driver");102MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");103MODULE_LICENSE("GPL v2");104