1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * (C) Copyright 2015
4 * Dirk Eibach,  Guntermann & Drunck GmbH, eibach@gdsys.de
5 *
6 * (C) Copyright 2017
7 * Mario Six,  Guntermann & Drunck GmbH, mario.six@gdsys.cc
8 */
9
10#include <common.h>
11#include <dm.h>
12#include <regmap.h>
13#include <misc.h>
14
15struct gdsys_rxaui_ctrl_regs {
16	u16 gen_cnt;
17	u16 err_cnt;
18	u16 succ_cnt;
19	u16 status;
20	u16 ctrl_0;
21	u16 ctrl_1;
22};
23
24#define rxaui_ctrl_set(map, member, val) \
25	regmap_set(map, struct gdsys_rxaui_ctrl_regs, member, val)
26
27#define rxaui_ctrl_get(map, member, valp) \
28	regmap_get(map, struct gdsys_rxaui_ctrl_regs, member, valp)
29
30struct gdsys_rxaui_ctrl_priv {
31	struct regmap *map;
32	bool state;
33};
34
35int gdsys_rxaui_set_polarity_inversion(struct udevice *dev, bool val)
36{
37	struct gdsys_rxaui_ctrl_priv *priv = dev_get_priv(dev);
38	u16 state;
39
40	priv->state = !priv->state;
41
42	rxaui_ctrl_get(priv->map, ctrl_1, &state);
43
44	if (val)
45		state |= ~0x7800;
46	else
47		state &= ~0x7800;
48
49	rxaui_ctrl_set(priv->map, ctrl_1, state);
50
51	return !priv->state;
52}
53
54static const struct misc_ops gdsys_rxaui_ctrl_ops = {
55	.set_enabled = gdsys_rxaui_set_polarity_inversion,
56};
57
58int gdsys_rxaui_ctrl_probe(struct udevice *dev)
59{
60	struct gdsys_rxaui_ctrl_priv *priv = dev_get_priv(dev);
61
62	regmap_init_mem(dev_ofnode(dev), &priv->map);
63
64	priv->state = false;
65
66	return 0;
67}
68
69static const struct udevice_id gdsys_rxaui_ctrl_ids[] = {
70	{ .compatible = "gdsys,rxaui_ctrl" },
71	{ }
72};
73
74U_BOOT_DRIVER(gdsys_rxaui_ctrl) = {
75	.name           = "gdsys_rxaui_ctrl",
76	.id             = UCLASS_MISC,
77	.ops		= &gdsys_rxaui_ctrl_ops,
78	.of_match       = gdsys_rxaui_ctrl_ids,
79	.probe          = gdsys_rxaui_ctrl_probe,
80	.priv_auto	= sizeof(struct gdsys_rxaui_ctrl_priv),
81};
82