summaryrefslogtreecommitdiff
path: root/net/mdio-uclass.c
blob: 66ee2e19763aea2bf03343c16664ba7574fe9d37 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
// SPDX-License-Identifier: GPL-2.0+
/*
 * (C) Copyright 2019
 * Alex Marginean, NXP
 */

#include <common.h>
#include <dm.h>
#include <log.h>
#include <malloc.h>
#include <miiphy.h>
#include <dm/device-internal.h>
#include <dm/device_compat.h>
#include <dm/uclass-internal.h>
#include <linux/compat.h>

/* DT node properties for MAC-PHY interface */
#define PHY_MODE_STR_CNT	2
static const char *phy_mode_str[PHY_MODE_STR_CNT] = { "phy-mode",
						      "phy-connection-type" };
/* DT node properties that reference a PHY node */
#define PHY_HANDLE_STR_CNT	3
const char *phy_handle_str[PHY_HANDLE_STR_CNT] = { "phy-handle",
						   "phy",
						   "phy-device" };

void dm_mdio_probe_devices(void)
{
	struct udevice *it;
	struct uclass *uc;

	uclass_get(UCLASS_MDIO, &uc);
	uclass_foreach_dev(it, uc) {
		device_probe(it);
	}
}

static int dm_mdio_post_bind(struct udevice *dev)
{
	const char *dt_name;

	/* set a custom name for the MDIO device, if present in DT */
	if (ofnode_valid(dev->node)) {
		dt_name = ofnode_read_string(dev->node, "device-name");
		if (dt_name) {
			debug("renaming dev %s to %s\n", dev->name, dt_name);
			device_set_name(dev, dt_name);
		}
	}

	/*
	 * MDIO command doesn't like spaces in names, don't allow them to keep
	 * it happy
	 */
	if (strchr(dev->name, ' ')) {
		debug("\nError: MDIO device name \"%s\" has a space!\n",
		      dev->name);
		return -EINVAL;
	}

	return 0;
}

/*
 * Following read/write/reset functions are registered with legacy MII code.
 * These are called for PHY operations by upper layers and we further call the
 * DM MDIO driver functions.
 */
static int mdio_read(struct mii_dev *mii_bus, int addr, int devad, int reg)
{
	struct udevice *dev = mii_bus->priv;

	return mdio_get_ops(dev)->read(dev, addr, devad, reg);
}

static int mdio_write(struct mii_dev *mii_bus, int addr, int devad, int reg,
		      u16 val)
{
	struct udevice *dev = mii_bus->priv;

	return mdio_get_ops(dev)->write(dev, addr, devad, reg, val);
}

static int mdio_reset(struct mii_dev *mii_bus)
{
	struct udevice *dev = mii_bus->priv;

	if (mdio_get_ops(dev)->reset)
		return mdio_get_ops(dev)->reset(dev);
	else
		return 0;
}

static int dm_mdio_post_probe(struct udevice *dev)
{
	struct mdio_perdev_priv *pdata = dev_get_uclass_priv(dev);

	pdata->mii_bus = mdio_alloc();
	pdata->mii_bus->read = mdio_read;
	pdata->mii_bus->write = mdio_write;
	pdata->mii_bus->reset = mdio_reset;
	pdata->mii_bus->priv = dev;
	strncpy(pdata->mii_bus->name, dev->name, MDIO_NAME_LEN - 1);

	return mdio_register(pdata->mii_bus);
}

static int dm_mdio_pre_remove(struct udevice *dev)
{
	struct mdio_perdev_priv *pdata = dev_get_uclass_priv(dev);
	struct mdio_ops *ops = mdio_get_ops(dev);

	if (ops->reset)
		ops->reset(dev);
	mdio_unregister(pdata->mii_bus);
	mdio_free(pdata->mii_bus);

	return 0;
}

struct phy_device *dm_mdio_phy_connect(struct udevice *mdiodev, int phyaddr,
				       struct udevice *ethdev,
				       phy_interface_t interface)
{
	struct mdio_perdev_priv *pdata = dev_get_uclass_priv(mdiodev);

	if (device_probe(mdiodev))
		return NULL;

	return phy_connect(pdata->mii_bus, phyaddr, ethdev, interface);
}

static struct phy_device *dm_eth_connect_phy_handle(struct udevice *ethdev,
						    phy_interface_t interface)
{
	u32 phy_addr;
	struct udevice *mdiodev;
	struct phy_device *phy;
	struct ofnode_phandle_args phandle = {.node = ofnode_null()};
	int i;

	for (i = 0; i < PHY_HANDLE_STR_CNT; i++)
		if (!dev_read_phandle_with_args(ethdev, phy_handle_str[i], NULL,
						0, 0, &phandle))
			break;

	if (!ofnode_valid(phandle.node)) {
		dev_dbg(dev, "can't find PHY node\n");
		return NULL;
	}

	/*
	 * reading 'reg' directly should be fine.  This is a PHY node, the
	 * address is always size 1 and requires no translation
	 */
	if (ofnode_read_u32(phandle.node, "reg", &phy_addr)) {
		dev_dbg(ethdev, "missing reg property in phy node\n");
		return NULL;
	}

	if (uclass_get_device_by_ofnode(UCLASS_MDIO,
					ofnode_get_parent(phandle.node),
					&mdiodev)) {
		dev_dbg(dev, "can't find MDIO bus for node %s\n",
			ofnode_get_name(ofnode_get_parent(phandle.node)));
		return NULL;
	}

	phy = dm_mdio_phy_connect(mdiodev, phy_addr, ethdev, interface);

	if (phy)
		phy->node = phandle.node;

	return phy;
}

/* Connect to a PHY linked in eth DT node */
struct phy_device *dm_eth_phy_connect(struct udevice *ethdev)
{
	const char *if_str;
	phy_interface_t interface;
	struct phy_device *phy;
	int i;

	if (!ofnode_valid(ethdev->node)) {
		debug("%s: supplied eth dev has no DT node!\n", ethdev->name);
		return NULL;
	}

	interface = PHY_INTERFACE_MODE_NONE;
	for (i = 0; i < PHY_MODE_STR_CNT; i++) {
		if_str = ofnode_read_string(ethdev->node, phy_mode_str[i]);
		if (if_str) {
			interface = phy_get_interface_by_name(if_str);
			break;
		}
	}
	if (interface < 0)
		interface = PHY_INTERFACE_MODE_NONE;
	if (interface == PHY_INTERFACE_MODE_NONE)
		dev_dbg(ethdev, "can't find interface mode, default to NONE\n");

	phy = dm_eth_connect_phy_handle(ethdev, interface);

	if (!phy)
		return NULL;

	phy->interface = interface;

	return phy;
}

UCLASS_DRIVER(mdio) = {
	.id = UCLASS_MDIO,
	.name = "mdio",
	.post_bind  = dm_mdio_post_bind,
	.post_probe = dm_mdio_post_probe,
	.pre_remove = dm_mdio_pre_remove,
	.per_device_auto_alloc_size = sizeof(struct mdio_perdev_priv),
};