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