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
10static 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
35static 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};
40MODULE_DEVICE_TABLE(pci, loongson_spi_devices);
41
42static 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};
51module_pci_driver(loongson_spi_pci_driver);
52
53MODULE_DESCRIPTION("Loongson spi pci driver");
54MODULE_LICENSE("GPL");
55MODULE_IMPORT_NS(SPI_LOONGSON_CORE);
56