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 loongson_spi_pci_register(struct pci_dev * pdev,const struct pci_device_id * ent)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 ret = pcim_iomap_regions(pdev, BIT(pci_bar), pci_name(pdev)); 23 if (ret) 24 return dev_err_probe(dev, ret, "failed to request and remap memory\n"); 25 26 reg_base = pcim_iomap_table(pdev)[pci_bar]; 27 28 ret = loongson_spi_init_controller(dev, reg_base); 29 if (ret) 30 return dev_err_probe(dev, ret, "failed to initialize controller\n"); 31 32 return 0; 33 } 34 35 static struct pci_device_id loongson_spi_devices[] = { 36 { PCI_DEVICE(PCI_VENDOR_ID_LOONGSON, 0x7a0b) }, 37 { PCI_DEVICE(PCI_VENDOR_ID_LOONGSON, 0x7a1b) }, 38 { } 39 }; 40 MODULE_DEVICE_TABLE(pci, loongson_spi_devices); 41 42 static struct pci_driver loongson_spi_pci_driver = { 43 .name = "loongson-spi-pci", 44 .id_table = loongson_spi_devices, 45 .probe = loongson_spi_pci_register, 46 .driver = { 47 .bus = &pci_bus_type, 48 .pm = &loongson_spi_dev_pm_ops, 49 }, 50 }; 51 module_pci_driver(loongson_spi_pci_driver); 52 53 MODULE_DESCRIPTION("Loongson spi pci driver"); 54 MODULE_LICENSE("GPL"); 55 MODULE_IMPORT_NS(SPI_LOONGSON_CORE); 56