2 * Driver for the Texas Instruments DP83867 PHY
4 * Copyright (C) 2015 Texas Instruments Inc.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
16 #include <linux/ethtool.h>
17 #include <linux/kernel.h>
18 #include <linux/mii.h>
19 #include <linux/module.h>
21 #include <linux/phy.h>
23 #include <dt-bindings/net/ti-dp83867.h>
25 #define DP83867_PHY_ID 0x2000a231
26 #define DP83867_DEVADDR 0x1f
28 #define MII_DP83867_PHYCTRL 0x10
29 #define MII_DP83867_MICR 0x12
30 #define MII_DP83867_ISR 0x13
31 #define DP83867_CTRL 0x1f
33 /* Extended Registers */
34 #define DP83867_RGMIICTL 0x0032
35 #define DP83867_RGMIIDCTL 0x0086
37 #define DP83867_SW_RESET BIT(15)
38 #define DP83867_SW_RESTART BIT(14)
40 /* MICR Interrupt bits */
41 #define MII_DP83867_MICR_AN_ERR_INT_EN BIT(15)
42 #define MII_DP83867_MICR_SPEED_CHNG_INT_EN BIT(14)
43 #define MII_DP83867_MICR_DUP_MODE_CHNG_INT_EN BIT(13)
44 #define MII_DP83867_MICR_PAGE_RXD_INT_EN BIT(12)
45 #define MII_DP83867_MICR_AUTONEG_COMP_INT_EN BIT(11)
46 #define MII_DP83867_MICR_LINK_STS_CHNG_INT_EN BIT(10)
47 #define MII_DP83867_MICR_FALSE_CARRIER_INT_EN BIT(8)
48 #define MII_DP83867_MICR_SLEEP_MODE_CHNG_INT_EN BIT(4)
49 #define MII_DP83867_MICR_WOL_INT_EN BIT(3)
50 #define MII_DP83867_MICR_XGMII_ERR_INT_EN BIT(2)
51 #define MII_DP83867_MICR_POL_CHNG_INT_EN BIT(1)
52 #define MII_DP83867_MICR_JABBER_INT_EN BIT(0)
55 #define DP83867_RGMII_TX_CLK_DELAY_EN BIT(1)
56 #define DP83867_RGMII_RX_CLK_DELAY_EN BIT(0)
59 #define DP83867_PHYCR_FIFO_DEPTH_SHIFT 14
62 #define DP83867_RGMII_TX_CLK_DELAY_SHIFT 4
64 struct dp83867_private {
70 static int dp83867_ack_interrupt(struct phy_device *phydev)
72 int err = phy_read(phydev, MII_DP83867_ISR);
80 static int dp83867_config_intr(struct phy_device *phydev)
84 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
85 micr_status = phy_read(phydev, MII_DP83867_MICR);
90 (MII_DP83867_MICR_AN_ERR_INT_EN |
91 MII_DP83867_MICR_SPEED_CHNG_INT_EN |
92 MII_DP83867_MICR_DUP_MODE_CHNG_INT_EN |
93 MII_DP83867_MICR_SLEEP_MODE_CHNG_INT_EN);
95 return phy_write(phydev, MII_DP83867_MICR, micr_status);
99 return phy_write(phydev, MII_DP83867_MICR, micr_status);
102 #ifdef CONFIG_OF_MDIO
103 static int dp83867_of_init(struct phy_device *phydev)
105 struct dp83867_private *dp83867 = phydev->priv;
106 struct device *dev = &phydev->dev;
107 struct device_node *of_node = dev->of_node;
110 if (!of_node && dev->parent->of_node)
111 of_node = dev->parent->of_node;
113 if (!phydev->dev.of_node)
116 ret = of_property_read_u32(of_node, "ti,rx-internal-delay",
117 &dp83867->rx_id_delay);
121 ret = of_property_read_u32(of_node, "ti,tx-internal-delay",
122 &dp83867->tx_id_delay);
126 ret = of_property_read_u32(of_node, "ti,fifo-depth",
127 &dp83867->fifo_depth);
134 static int dp83867_of_init(struct phy_device *phydev)
138 #endif /* CONFIG_OF_MDIO */
140 static int dp83867_config_init(struct phy_device *phydev)
142 struct dp83867_private *dp83867;
147 dp83867 = devm_kzalloc(&phydev->dev, sizeof(*dp83867),
152 phydev->priv = dp83867;
153 ret = dp83867_of_init(phydev);
157 dp83867 = (struct dp83867_private *)phydev->priv;
160 if (phy_interface_is_rgmii(phydev)) {
161 ret = phy_write(phydev, MII_DP83867_PHYCTRL,
162 (dp83867->fifo_depth << DP83867_PHYCR_FIFO_DEPTH_SHIFT));
167 if ((phydev->interface >= PHY_INTERFACE_MODE_RGMII_ID) &&
168 (phydev->interface <= PHY_INTERFACE_MODE_RGMII_RXID)) {
169 val = phy_read_mmd_indirect(phydev, DP83867_RGMIICTL,
170 DP83867_DEVADDR, phydev->addr);
172 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
173 val |= (DP83867_RGMII_TX_CLK_DELAY_EN | DP83867_RGMII_RX_CLK_DELAY_EN);
175 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)
176 val |= DP83867_RGMII_TX_CLK_DELAY_EN;
178 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID)
179 val |= DP83867_RGMII_RX_CLK_DELAY_EN;
181 phy_write_mmd_indirect(phydev, DP83867_RGMIICTL,
182 DP83867_DEVADDR, phydev->addr, val);
184 delay = (dp83867->rx_id_delay |
185 (dp83867->tx_id_delay << DP83867_RGMII_TX_CLK_DELAY_SHIFT));
187 phy_write_mmd_indirect(phydev, DP83867_RGMIIDCTL,
188 DP83867_DEVADDR, phydev->addr, delay);
194 static int dp83867_phy_reset(struct phy_device *phydev)
198 err = phy_write(phydev, DP83867_CTRL, DP83867_SW_RESET);
202 return dp83867_config_init(phydev);
205 static struct phy_driver dp83867_driver[] = {
207 .phy_id = DP83867_PHY_ID,
208 .phy_id_mask = 0xfffffff0,
209 .name = "TI DP83867",
210 .features = PHY_GBIT_FEATURES,
211 .flags = PHY_HAS_INTERRUPT,
213 .config_init = dp83867_config_init,
214 .soft_reset = dp83867_phy_reset,
217 .ack_interrupt = dp83867_ack_interrupt,
218 .config_intr = dp83867_config_intr,
220 .config_aneg = genphy_config_aneg,
221 .read_status = genphy_read_status,
222 .suspend = genphy_suspend,
223 .resume = genphy_resume,
225 .driver = {.owner = THIS_MODULE,}
228 module_phy_driver(dp83867_driver);
230 static struct mdio_device_id __maybe_unused dp83867_tbl[] = {
231 { DP83867_PHY_ID, 0xfffffff0 },
235 MODULE_DEVICE_TABLE(mdio, dp83867_tbl);
237 MODULE_DESCRIPTION("Texas Instruments DP83867 PHY driver");
238 MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com");
239 MODULE_LICENSE("GPL");