1 /* This program is free software; you can redistribute it and/or modify
2 * it under the terms of the GNU General Public License as published by
3 * the Free Software Foundation; version 2 of the License
5 * This program is distributed in the hope that it will be useful,
6 * but WITHOUT ANY WARRANTY; without even the implied warranty of
7 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
8 * GNU General Public License for more details.
10 * Copyright (C) 2009-2015 John Crispin <blogic@openwrt.org>
11 * Copyright (C) 2009-2015 Felix Fietkau <nbd@nbd.name>
12 * Copyright (C) 2013-2015 Michael Lee <igvtee@gmail.com>
15 #include <linux/module.h>
16 #include <linux/kernel.h>
17 #include <linux/types.h>
18 #include <linux/of_net.h>
19 #include <linux/of_mdio.h>
21 #include "mtk_eth_soc.h"
22 #include "mdio_rt2880.h"
25 #define FE_MDIO_RETRY 1000
27 static unsigned char *rt2880_speed_str(struct fe_priv *priv)
29 switch (priv->phy->speed[0]) {
41 void rt2880_mdio_link_adjust(struct fe_priv *priv, int port)
46 netif_carrier_off(priv->netdev);
47 netdev_info(priv->netdev, "link down\n");
51 mdio_cfg = FE_MDIO_CFG_TX_CLK_SKEW_200 |
52 FE_MDIO_CFG_RX_CLK_SKEW_200 |
53 FE_MDIO_CFG_GP1_FRC_EN;
55 if (priv->phy->duplex[0] == DUPLEX_FULL)
56 mdio_cfg |= FE_MDIO_CFG_GP1_DUPLEX;
58 if (priv->phy->tx_fc[0])
59 mdio_cfg |= FE_MDIO_CFG_GP1_FC_TX;
61 if (priv->phy->rx_fc[0])
62 mdio_cfg |= FE_MDIO_CFG_GP1_FC_RX;
64 switch (priv->phy->speed[0]) {
66 mdio_cfg |= FE_MDIO_CFG_GP1_SPEED_10;
69 mdio_cfg |= FE_MDIO_CFG_GP1_SPEED_100;
72 mdio_cfg |= FE_MDIO_CFG_GP1_SPEED_1000;
78 fe_w32(mdio_cfg, FE_MDIO_CFG);
80 netif_carrier_on(priv->netdev);
81 netdev_info(priv->netdev, "link up (%sMbps/%s duplex)\n",
82 rt2880_speed_str(priv),
83 (priv->phy->duplex[0] == DUPLEX_FULL) ? "Full" : "Half");
86 static int rt2880_mdio_wait_ready(struct fe_priv *priv)
90 retries = FE_MDIO_RETRY;
94 t = fe_r32(FE_MDIO_ACCESS);
95 if ((t & BIT(31)) == 0)
104 dev_err(priv->device, "MDIO operation timed out\n");
108 int rt2880_mdio_read(struct mii_bus *bus, int phy_addr, int phy_reg)
110 struct fe_priv *priv = bus->priv;
114 err = rt2880_mdio_wait_ready(priv);
118 t = (phy_addr << 24) | (phy_reg << 16);
119 fe_w32(t, FE_MDIO_ACCESS);
121 fe_w32(t, FE_MDIO_ACCESS);
123 err = rt2880_mdio_wait_ready(priv);
127 pr_debug("%s: addr=%04x, reg=%04x, value=%04x\n", __func__,
128 phy_addr, phy_reg, fe_r32(FE_MDIO_ACCESS) & 0xffff);
130 return fe_r32(FE_MDIO_ACCESS) & 0xffff;
133 int rt2880_mdio_write(struct mii_bus *bus, int phy_addr, int phy_reg, u16 val)
135 struct fe_priv *priv = bus->priv;
139 pr_debug("%s: addr=%04x, reg=%04x, value=%04x\n", __func__,
140 phy_addr, phy_reg, fe_r32(FE_MDIO_ACCESS) & 0xffff);
142 err = rt2880_mdio_wait_ready(priv);
146 t = (1 << 30) | (phy_addr << 24) | (phy_reg << 16) | val;
147 fe_w32(t, FE_MDIO_ACCESS);
149 fe_w32(t, FE_MDIO_ACCESS);
151 return rt2880_mdio_wait_ready(priv);
154 void rt2880_port_init(struct fe_priv *priv, struct device_node *np)
156 const __be32 *id = of_get_property(np, "reg", NULL);
161 if (!id || (be32_to_cpu(*id) != 0)) {
162 pr_err("%s: invalid port id\n", np->name);
166 priv->phy->phy_fixed[0] = of_get_property(np,
167 "mediatek,fixed-link", &size);
168 if (priv->phy->phy_fixed[0] &&
169 (size != (4 * sizeof(*priv->phy->phy_fixed[0])))) {
170 pr_err("%s: invalid fixed link property\n", np->name);
171 priv->phy->phy_fixed[0] = NULL;
175 phy_mode = of_get_phy_mode(np);
177 case PHY_INTERFACE_MODE_RGMII:
179 case PHY_INTERFACE_MODE_MII:
181 case PHY_INTERFACE_MODE_RMII:
184 if (!priv->phy->phy_fixed[0])
185 dev_err(priv->device, "port %d - invalid phy mode\n",
186 priv->phy->speed[0]);
190 priv->phy->phy_node[0] = of_parse_phandle(np, "phy-handle", 0);
191 if (!priv->phy->phy_node[0] && !priv->phy->phy_fixed[0])
194 if (priv->phy->phy_fixed[0]) {
195 link = priv->phy->phy_fixed[0];
196 priv->phy->speed[0] = be32_to_cpup(link++);
197 priv->phy->duplex[0] = be32_to_cpup(link++);
198 priv->phy->tx_fc[0] = be32_to_cpup(link++);
199 priv->phy->rx_fc[0] = be32_to_cpup(link++);
202 switch (priv->phy->speed[0]) {
210 dev_err(priv->device, "invalid link speed: %d\n",
211 priv->phy->speed[0]);
212 priv->phy->phy_fixed[0] = 0;
215 dev_info(priv->device, "using fixed link parameters\n");
216 rt2880_mdio_link_adjust(priv, 0);
220 if (priv->phy->phy_node[0] && mdiobus_get_phy(priv->mii_bus, 0))
221 fe_connect_phy_node(priv, priv->phy->phy_node[0]);