drivers/spi/spi-loongson-pci.c

   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");