1 // SPDX-License-Identifier: GPL-2.0+ 2 // PCI interface driver for Loongson SPI Support 3 // Copyright (C) 2023 Loongson Technology Corporation Limited 4 5 #include <linux/mod_devicetable.h> 6 #include <linux/pci.h> 7 8 #include "spi-loongson.h" 9 10 static int loongson_spi_pci_register(struct pci_dev *pdev, 11 const struct pci_device_id *ent) 12 { 13 int ret; 14 void __iomem *reg_base; 15 struct device *dev = &pdev->dev; 16 int pci_bar = 0; 17 18 ret = pcim_enable_device(pdev); 19 if (ret < 0) 20 return dev_err_probe(dev, ret, "cannot enable pci device\n"); 21 22 reg_base = pcim_iomap_region(pdev, pci_bar, pci_name(pdev)); 23 ret = PTR_ERR_OR_ZERO(reg_base); 24 if (ret) 25 return dev_err_probe(dev, ret, "failed to request and remap memory\n"); 26 27 ret = loongson_spi_init_controller(dev, reg_base); 28 if (ret) 29 return dev_err_probe(dev, ret, "failed to initialize controller\n"); 30 31 return 0; 32 } 33 34 static struct pci_device_id loongson_spi_devices[] = { 35 { PCI_DEVICE(PCI_VENDOR_ID_LOONGSON, 0x7a0b) }, 36 { PCI_DEVICE(PCI_VENDOR_ID_LOONGSON, 0x7a1b) }, 37 { } 38 }; 39 MODULE_DEVICE_TABLE(pci, loongson_spi_devices); 40 41 static struct pci_driver loongson_spi_pci_driver = { 42 .name = "loongson-spi-pci", 43 .id_table = loongson_spi_devices, 44 .probe = loongson_spi_pci_register, 45 .driver = { 46 .bus = &pci_bus_type, 47 .pm = &loongson_spi_dev_pm_ops, 48 }, 49 }; 50 module_pci_driver(loongson_spi_pci_driver); 51 52 MODULE_DESCRIPTION("Loongson spi pci driver"); 53 MODULE_LICENSE("GPL"); 54 MODULE_IMPORT_NS("SPI_LOONGSON_CORE"); 55