/* * 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, 0x34a4), (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");