1 | /* |
2 | * DWMAC glue for NXP LPC18xx/LPC43xx Ethernet |
3 | * |
4 | * Copyright (C) 2015 Joachim Eastwood <manabian@gmail.com> |
5 | * |
6 | * This file is licensed under the terms of the GNU General Public |
7 | * License version 2. This program is licensed "as is" without any |
8 | * warranty of any kind, whether express or implied. |
9 | */ |
10 | |
11 | #include <linux/mfd/syscon.h> |
12 | #include <linux/module.h> |
13 | #include <linux/of.h> |
14 | #include <linux/of_net.h> |
15 | #include <linux/phy.h> |
16 | #include <linux/platform_device.h> |
17 | #include <linux/regmap.h> |
18 | #include <linux/stmmac.h> |
19 | |
20 | #include "stmmac_platform.h" |
21 | |
22 | /* Register defines for CREG syscon */ |
23 | #define LPC18XX_CREG_CREG6 0x12c |
24 | # define LPC18XX_CREG_CREG6_ETHMODE_MASK 0x7 |
25 | # define LPC18XX_CREG_CREG6_ETHMODE_MII 0x0 |
26 | # define LPC18XX_CREG_CREG6_ETHMODE_RMII 0x4 |
27 | |
28 | static int lpc18xx_dwmac_probe(struct platform_device *pdev) |
29 | { |
30 | struct plat_stmmacenet_data *plat_dat; |
31 | struct stmmac_resources stmmac_res; |
32 | struct regmap *reg; |
33 | u8 ethmode; |
34 | int ret; |
35 | |
36 | ret = stmmac_get_platform_resources(pdev, stmmac_res: &stmmac_res); |
37 | if (ret) |
38 | return ret; |
39 | |
40 | plat_dat = devm_stmmac_probe_config_dt(pdev, mac: stmmac_res.mac); |
41 | if (IS_ERR(ptr: plat_dat)) |
42 | return PTR_ERR(ptr: plat_dat); |
43 | |
44 | plat_dat->has_gmac = true; |
45 | |
46 | reg = syscon_regmap_lookup_by_compatible(s: "nxp,lpc1850-creg" ); |
47 | if (IS_ERR(ptr: reg)) { |
48 | dev_err(&pdev->dev, "syscon lookup failed\n" ); |
49 | return PTR_ERR(ptr: reg); |
50 | } |
51 | |
52 | if (plat_dat->mac_interface == PHY_INTERFACE_MODE_MII) { |
53 | ethmode = LPC18XX_CREG_CREG6_ETHMODE_MII; |
54 | } else if (plat_dat->mac_interface == PHY_INTERFACE_MODE_RMII) { |
55 | ethmode = LPC18XX_CREG_CREG6_ETHMODE_RMII; |
56 | } else { |
57 | dev_err(&pdev->dev, "Only MII and RMII mode supported\n" ); |
58 | return -EINVAL; |
59 | } |
60 | |
61 | regmap_update_bits(map: reg, LPC18XX_CREG_CREG6, |
62 | LPC18XX_CREG_CREG6_ETHMODE_MASK, val: ethmode); |
63 | |
64 | return stmmac_dvr_probe(device: &pdev->dev, plat_dat, res: &stmmac_res); |
65 | } |
66 | |
67 | static const struct of_device_id lpc18xx_dwmac_match[] = { |
68 | { .compatible = "nxp,lpc1850-dwmac" }, |
69 | { } |
70 | }; |
71 | MODULE_DEVICE_TABLE(of, lpc18xx_dwmac_match); |
72 | |
73 | static struct platform_driver lpc18xx_dwmac_driver = { |
74 | .probe = lpc18xx_dwmac_probe, |
75 | .remove_new = stmmac_pltfr_remove, |
76 | .driver = { |
77 | .name = "lpc18xx-dwmac" , |
78 | .pm = &stmmac_pltfr_pm_ops, |
79 | .of_match_table = lpc18xx_dwmac_match, |
80 | }, |
81 | }; |
82 | module_platform_driver(lpc18xx_dwmac_driver); |
83 | |
84 | MODULE_AUTHOR("Joachim Eastwood <manabian@gmail.com>" ); |
85 | MODULE_DESCRIPTION("DWMAC glue for LPC18xx/43xx Ethernet" ); |
86 | MODULE_LICENSE("GPL v2" ); |
87 | |