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Quellcodebibliothek Statistik Leitseite products/Sources/formale Sprachen/C/Linux/drivers/spi/   (Linux Kernel Version 6.17.9©)  Datei vom 24.10.2025 mit Größe 36 kB image not shown  

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spi-amd-pci.c


products/Sources/formale Sprachen/C/Linux/drivers/spi/spi-amd-pci.c

// SPDX-License-Identifier: GPL-2.0-or-later /* * AMD SPI controller driver * * Copyright (c) 2025, Advanced Micro Devices, Inc. * All Rights Reserved. * * Authors: Krishnamoorthi M * Akshata MukundShetty */ #include #include #include #include "spi-amd.h" #define AMD_PCI_DEVICE_ID_LPC_BRIDGE 0x1682 #define AMD_PCI_LPC_SPI_BASE_ADDR_REG 0xA0 #define AMD_SPI_BASE_ADDR_MASK ~0xFF #define AMD_HID2_PCI_BAR_OFFSET 0x00002000 #define AMD_HID2_MEM_SIZE 0x200 static struct pci_device_id pci_spi_ids[] = { { PCI_DEVICE(PCI_VENDOR_ID_AMD, AMD_PCI_DEVICE_ID_LPC_BRIDGE) }, { 0, } }; MODULE_DEVICE_TABLE(pci, pci_spi_ids); static int amd_spi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) { struct device *dev = &pdev->dev; struct spi_controller *host; struct amd_spi *amd_spi; u32 io_base_addr; /* Allocate storage for host and driver private data */ host = devm_spi_alloc_host(dev, sizeof(struct amd_spi)); if (!host) return dev_err_probe(dev, -ENOMEM, "Error allocating SPI host\n"); amd_spi = spi_controller_get_devdata(host); pci_read_config_dword(pdev, AMD_PCI_LPC_SPI_BASE_ADDR_REG, &io_base_addr); io_base_addr = (io_base_addr & AMD_SPI_BASE_ADDR_MASK) + AMD_HID2_PCI_BAR_OFFSET; amd_spi->io_remap_addr = devm_ioremap(dev, io_base_addr, AMD_HID2_MEM_SIZE); if (!amd_spi->io_remap_addr) return dev_err_probe(dev, -ENOMEM, "ioremap of SPI registers failed\n"); dev_dbg(dev, "io_remap_address: %p\n", amd_spi->io_remap_addr); amd_spi->version = AMD_HID2_SPI; host->bus_num = 2; return amd_spi_probe_common(dev, host); } static struct pci_driver amd_spi_pci_driver = { .name = "amd_spi_pci", .id_table = pci_spi_ids, .probe = amd_spi_pci_probe, }; module_pci_driver(amd_spi_pci_driver); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("AMD HID2 SPI Controller Driver");

                                                                                                                                                                                                                                                                                                                                                                                                     

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