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