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Ye Li5fe419e2020-05-03 22:41:14 +08001// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright 2020 NXP
4 */
5
Patrick Delaunaya5db6e12021-07-20 20:15:28 +02006#define LOG_CATEGORY UCLASS_ETH_PHY
7
Ye Li5fe419e2020-05-03 22:41:14 +08008#include <common.h>
9#include <dm.h>
Patrick Delaunay880ecb02021-07-20 20:09:52 +020010#include <log.h>
Ye Li5fe419e2020-05-03 22:41:14 +080011#include <net.h>
Patrick Delaunayd33982d2021-07-20 20:09:51 +020012#include <asm-generic/gpio.h>
Patrick Delaunay880ecb02021-07-20 20:09:52 +020013#include <dm/device_compat.h>
Ye Li5fe419e2020-05-03 22:41:14 +080014#include <dm/device-internal.h>
15#include <dm/uclass-internal.h>
16#include <dm/lists.h>
Patrick Delaunayd33982d2021-07-20 20:09:51 +020017#include <linux/delay.h>
Ye Li5fe419e2020-05-03 22:41:14 +080018
19struct eth_phy_device_priv {
20 struct mii_dev *mdio_bus;
Patrick Delaunayd33982d2021-07-20 20:09:51 +020021 struct gpio_desc reset_gpio;
22 u32 reset_assert_delay;
23 u32 reset_deassert_delay;
Ye Li5fe419e2020-05-03 22:41:14 +080024};
25
26int eth_phy_binds_nodes(struct udevice *eth_dev)
27{
28 ofnode mdio_node, phy_node;
29 const char *node_name;
30 int ret;
31
Patrick Delaunay035d8482021-07-20 20:09:53 +020032 /* search a subnode named "mdio.*" */
33 dev_for_each_subnode(mdio_node, eth_dev) {
34 node_name = ofnode_get_name(mdio_node);
35 if (!strncmp(node_name, "mdio", 4))
36 break;
37 }
Ye Li5fe419e2020-05-03 22:41:14 +080038 if (!ofnode_valid(mdio_node)) {
Patrick Delaunay035d8482021-07-20 20:09:53 +020039 dev_dbg(eth_dev, "%s: %s mdio subnode not found!\n", __func__,
Patrick Delaunay880ecb02021-07-20 20:09:52 +020040 eth_dev->name);
Ye Li5fe419e2020-05-03 22:41:14 +080041 return -ENXIO;
42 }
Patrick Delaunay035d8482021-07-20 20:09:53 +020043 dev_dbg(eth_dev, "%s: %s subnode found!\n", __func__, node_name);
Ye Li5fe419e2020-05-03 22:41:14 +080044
45 ofnode_for_each_subnode(phy_node, mdio_node) {
46 node_name = ofnode_get_name(phy_node);
47
Patrick Delaunay880ecb02021-07-20 20:09:52 +020048 dev_dbg(eth_dev, "* Found child node: '%s'\n", node_name);
Ye Li5fe419e2020-05-03 22:41:14 +080049
50 ret = device_bind_driver_to_node(eth_dev,
51 "eth_phy_generic_drv",
52 node_name, phy_node, NULL);
53 if (ret) {
Patrick Delaunay880ecb02021-07-20 20:09:52 +020054 dev_dbg(eth_dev, " - Eth phy binding error: %d\n", ret);
Ye Li5fe419e2020-05-03 22:41:14 +080055 continue;
56 }
57
Patrick Delaunay880ecb02021-07-20 20:09:52 +020058 dev_dbg(eth_dev, " - bound phy device: '%s'\n", node_name);
Ye Li5fe419e2020-05-03 22:41:14 +080059 }
60
61 return 0;
62}
63
64int eth_phy_set_mdio_bus(struct udevice *eth_dev, struct mii_dev *mdio_bus)
65{
66 struct udevice *dev;
67 struct eth_phy_device_priv *uc_priv;
68
69 for (uclass_first_device(UCLASS_ETH_PHY, &dev); dev;
70 uclass_next_device(&dev)) {
71 if (dev->parent == eth_dev) {
Simon Glass0fd3d912020-12-22 19:30:28 -070072 uc_priv = (struct eth_phy_device_priv *)(dev_get_uclass_priv(dev));
Ye Li5fe419e2020-05-03 22:41:14 +080073
74 if (!uc_priv->mdio_bus)
75 uc_priv->mdio_bus = mdio_bus;
76 }
77 }
78
79 return 0;
80}
81
82struct mii_dev *eth_phy_get_mdio_bus(struct udevice *eth_dev)
83{
84 int ret;
85 struct udevice *phy_dev;
86 struct eth_phy_device_priv *uc_priv;
87
88 /* Will probe the parent of phy device, then phy device */
89 ret = uclass_get_device_by_phandle(UCLASS_ETH_PHY, eth_dev,
90 "phy-handle", &phy_dev);
91 if (!ret) {
92 if (eth_dev != phy_dev->parent) {
93 /*
94 * phy_dev is shared and controlled by
95 * other eth controller
96 */
Simon Glass0fd3d912020-12-22 19:30:28 -070097 uc_priv = (struct eth_phy_device_priv *)(dev_get_uclass_priv(phy_dev));
Ye Li5fe419e2020-05-03 22:41:14 +080098 if (uc_priv->mdio_bus)
Patrick Delaunay880ecb02021-07-20 20:09:52 +020099 log_notice("Get shared mii bus on %s\n", eth_dev->name);
Ye Li5fe419e2020-05-03 22:41:14 +0800100 else
Patrick Delaunay880ecb02021-07-20 20:09:52 +0200101 log_notice("Can't get shared mii bus on %s\n", eth_dev->name);
Ye Li5fe419e2020-05-03 22:41:14 +0800102
103 return uc_priv->mdio_bus;
104 }
105 } else {
Marek Vasut766ba782022-01-01 20:12:23 +0100106 log_debug("Can't find phy-handle for %s\n", eth_dev->name);
Ye Li5fe419e2020-05-03 22:41:14 +0800107 }
108
109 return NULL;
110}
111
112int eth_phy_get_addr(struct udevice *dev)
113{
114 struct ofnode_phandle_args phandle_args;
115 int reg;
116
117 if (dev_read_phandle_with_args(dev, "phy-handle", NULL, 0, 0,
118 &phandle_args)) {
Patrick Delaunay880ecb02021-07-20 20:09:52 +0200119 dev_dbg(dev, "Failed to find phy-handle");
Ye Li5fe419e2020-05-03 22:41:14 +0800120 return -ENODEV;
121 }
122
123 reg = ofnode_read_u32_default(phandle_args.node, "reg", 0);
124
125 return reg;
126}
127
Patrick Delaunayd33982d2021-07-20 20:09:51 +0200128/* parsing generic properties of devicetree/bindings/net/ethernet-phy.yaml */
129static int eth_phy_of_to_plat(struct udevice *dev)
130{
131 struct eth_phy_device_priv *uc_priv = dev_get_uclass_priv(dev);
132 int ret;
133
134 if (!CONFIG_IS_ENABLED(DM_GPIO))
135 return 0;
136
137 /* search "reset-gpios" in phy node */
138 ret = gpio_request_by_name(dev, "reset-gpios", 0,
139 &uc_priv->reset_gpio,
Tim Harveyf3409d72022-03-01 12:15:02 -0800140 GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
Marek Vasut87770332021-11-13 03:23:11 +0100141 if (ret && ret != -ENOENT)
Patrick Delaunayd33982d2021-07-20 20:09:51 +0200142 return ret;
143
144 uc_priv->reset_assert_delay = dev_read_u32_default(dev, "reset-assert-us", 0);
145 uc_priv->reset_deassert_delay = dev_read_u32_default(dev, "reset-deassert-us", 0);
146
147 return 0;
148}
149
150void eth_phy_reset(struct udevice *dev, int value)
151{
152 struct eth_phy_device_priv *uc_priv = dev_get_uclass_priv(dev);
153 u32 delay;
154
155 if (!CONFIG_IS_ENABLED(DM_GPIO))
156 return;
157
158 if (!dm_gpio_is_valid(&uc_priv->reset_gpio))
159 return;
160
161 dm_gpio_set_value(&uc_priv->reset_gpio, value);
162
163 delay = value ? uc_priv->reset_assert_delay : uc_priv->reset_deassert_delay;
164 if (delay)
165 udelay(delay);
166}
167
168static int eth_phy_pre_probe(struct udevice *dev)
169{
170 /* Assert and deassert the reset signal */
171 eth_phy_reset(dev, 1);
172 eth_phy_reset(dev, 0);
173
174 return 0;
175}
176
Ye Li5fe419e2020-05-03 22:41:14 +0800177UCLASS_DRIVER(eth_phy_generic) = {
178 .id = UCLASS_ETH_PHY,
179 .name = "eth_phy_generic",
Simon Glass41575d82020-12-03 16:55:17 -0700180 .per_device_auto = sizeof(struct eth_phy_device_priv),
Patrick Delaunayd33982d2021-07-20 20:09:51 +0200181 .pre_probe = eth_phy_pre_probe,
Ye Li5fe419e2020-05-03 22:41:14 +0800182};
183
184U_BOOT_DRIVER(eth_phy_generic_drv) = {
185 .name = "eth_phy_generic_drv",
186 .id = UCLASS_ETH_PHY,
Patrick Delaunayd33982d2021-07-20 20:09:51 +0200187 .of_to_plat = eth_phy_of_to_plat,
Ye Li5fe419e2020-05-03 22:41:14 +0800188};