dwmac-sophgo.c

 1// SPDX-License-Identifier: GPL-2.0+
 2/*
 3 * Sophgo DWMAC platform driver
 4 *
 5 * Copyright (C) 2024 Inochi Amaoto <inochiama@gmail.com>
 6 */
 7
 8#include <linux/clk.h>
 9#include <linux/module.h>
10#include <linux/property.h>
11#include <linux/mod_devicetable.h>
12#include <linux/platform_device.h>
13
14#include "stmmac_platform.h"
15
16struct sophgo_dwmac_data {
17	bool has_internal_rx_delay;
18};
19
20static int sophgo_sg2044_dwmac_init(struct platform_device *pdev,
21				    struct plat_stmmacenet_data *plat_dat,
22				    struct stmmac_resources *stmmac_res)
23{
24	plat_dat->clk_tx_i = devm_clk_get_enabled(&pdev->dev, "tx");
25	if (IS_ERR(plat_dat->clk_tx_i))
26		return dev_err_probe(&pdev->dev, PTR_ERR(plat_dat->clk_tx_i),
27				     "failed to get tx clock\n");
28
29	plat_dat->flags |= STMMAC_FLAG_SPH_DISABLE;
30	plat_dat->set_clk_tx_rate = stmmac_set_clk_tx_rate;
31	plat_dat->multicast_filter_bins = 0;
32
33	return 0;
34}
35
36static int sophgo_dwmac_probe(struct platform_device *pdev)
37{
38	struct plat_stmmacenet_data *plat_dat;
39	const struct sophgo_dwmac_data *data;
40	struct stmmac_resources stmmac_res;
41	struct device *dev = &pdev->dev;
42	int ret;
43
44	ret = stmmac_get_platform_resources(pdev, &stmmac_res);
45	if (ret)
46		return dev_err_probe(dev, ret,
47				     "failed to get platform resources\n");
48
49	plat_dat = devm_stmmac_probe_config_dt(pdev, stmmac_res.mac);
50	if (IS_ERR(plat_dat))
51		return dev_err_probe(dev, PTR_ERR(plat_dat),
52				     "failed to parse DT parameters\n");
53
54	ret = sophgo_sg2044_dwmac_init(pdev, plat_dat, &stmmac_res);
55	if (ret)
56		return ret;
57
58	data = device_get_match_data(&pdev->dev);
59	if (data && data->has_internal_rx_delay) {
60		plat_dat->phy_interface = phy_fix_phy_mode_for_mac_delays(plat_dat->phy_interface,
61									  false, true);
62		if (plat_dat->phy_interface == PHY_INTERFACE_MODE_NA)
63			return -EINVAL;
64	}
65
66	return stmmac_dvr_probe(dev, plat_dat, &stmmac_res);
67}
68
69static const struct sophgo_dwmac_data sg2042_dwmac_data = {
70	.has_internal_rx_delay = true,
71};
72
73static const struct of_device_id sophgo_dwmac_match[] = {
74	{ .compatible = "sophgo,sg2042-dwmac", .data = &sg2042_dwmac_data },
75	{ .compatible = "sophgo,sg2044-dwmac" },
76	{ /* sentinel */ }
77};
78MODULE_DEVICE_TABLE(of, sophgo_dwmac_match);
79
80static struct platform_driver sophgo_dwmac_driver = {
81	.probe  = sophgo_dwmac_probe,
82	.remove = stmmac_pltfr_remove,
83	.driver = {
84		.name = "sophgo-dwmac",
85		.pm = &stmmac_pltfr_pm_ops,
86		.of_match_table = sophgo_dwmac_match,
87	},
88};
89module_platform_driver(sophgo_dwmac_driver);
90
91MODULE_AUTHOR("Inochi Amaoto <inochiama@gmail.com>");
92MODULE_DESCRIPTION("Sophgo DWMAC platform driver");
93MODULE_LICENSE("GPL");