2 * Driver for the Texas Instruments DP83822 PHY
4 * Copyright (C) 2017 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/etherdevice.h>
18 #include <linux/kernel.h>
19 #include <linux/mii.h>
20 #include <linux/module.h>
22 #include <linux/phy.h>
23 #include <linux/netdevice.h>
25 #define DP83822_PHY_ID 0x2000a240
26 #define DP83822_DEVADDR 0x1f
28 #define MII_DP83822_PHYSCR 0x11
29 #define MII_DP83822_MISR1 0x12
30 #define MII_DP83822_MISR2 0x13
31 #define MII_DP83822_RESET_CTRL 0x1f
33 #define DP83822_HW_RESET BIT(15)
34 #define DP83822_SW_RESET BIT(14)
36 /* PHYSCR Register Fields */
37 #define DP83822_PHYSCR_INT_OE BIT(0) /* Interrupt Output Enable */
38 #define DP83822_PHYSCR_INTEN BIT(1) /* Interrupt Enable */
41 #define DP83822_RX_ERR_HF_INT_EN BIT(0)
42 #define DP83822_FALSE_CARRIER_HF_INT_EN BIT(1)
43 #define DP83822_ANEG_COMPLETE_INT_EN BIT(2)
44 #define DP83822_DUP_MODE_CHANGE_INT_EN BIT(3)
45 #define DP83822_SPEED_CHANGED_INT_EN BIT(4)
46 #define DP83822_LINK_STAT_INT_EN BIT(5)
47 #define DP83822_ENERGY_DET_INT_EN BIT(6)
48 #define DP83822_LINK_QUAL_INT_EN BIT(7)
51 #define DP83822_JABBER_DET_INT_EN BIT(0)
52 #define DP83822_WOL_PKT_INT_EN BIT(1)
53 #define DP83822_SLEEP_MODE_INT_EN BIT(2)
54 #define DP83822_MDI_XOVER_INT_EN BIT(3)
55 #define DP83822_LB_FIFO_INT_EN BIT(4)
56 #define DP83822_PAGE_RX_INT_EN BIT(5)
57 #define DP83822_ANEG_ERR_INT_EN BIT(6)
58 #define DP83822_EEE_ERROR_CHANGE_INT_EN BIT(7)
61 #define DP83822_WOL_INT_EN BIT(4)
62 #define DP83822_WOL_INT_STAT BIT(12)
64 #define MII_DP83822_RXSOP1 0x04a5
65 #define MII_DP83822_RXSOP2 0x04a6
66 #define MII_DP83822_RXSOP3 0x04a7
69 #define MII_DP83822_WOL_CFG 0x04a0
70 #define MII_DP83822_WOL_STAT 0x04a1
71 #define MII_DP83822_WOL_DA1 0x04a2
72 #define MII_DP83822_WOL_DA2 0x04a3
73 #define MII_DP83822_WOL_DA3 0x04a4
76 #define DP83822_WOL_MAGIC_EN BIT(0)
77 #define DP83822_WOL_SECURE_ON BIT(5)
78 #define DP83822_WOL_EN BIT(7)
79 #define DP83822_WOL_INDICATION_SEL BIT(8)
80 #define DP83822_WOL_CLR_INDICATION BIT(11)
82 static int dp83822_ack_interrupt(struct phy_device *phydev)
86 err = phy_read(phydev, MII_DP83822_MISR1);
90 err = phy_read(phydev, MII_DP83822_MISR2);
97 static int dp83822_set_wol(struct phy_device *phydev,
98 struct ethtool_wolinfo *wol)
100 struct net_device *ndev = phydev->attached_dev;
104 if (wol->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE)) {
105 mac = (const u8 *)ndev->dev_addr;
107 if (!is_valid_ether_addr(mac))
110 /* MAC addresses start with byte 5, but stored in mac[0].
111 * 822 PHYs store bytes 4|5, 2|3, 0|1
113 phy_write_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_DA1,
114 (mac[1] << 8) | mac[0]);
115 phy_write_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_DA2,
116 (mac[3] << 8) | mac[2]);
117 phy_write_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_DA3,
118 (mac[5] << 8) | mac[4]);
120 value = phy_read_mmd(phydev, DP83822_DEVADDR,
121 MII_DP83822_WOL_CFG);
122 if (wol->wolopts & WAKE_MAGIC)
123 value |= DP83822_WOL_MAGIC_EN;
125 value &= ~DP83822_WOL_MAGIC_EN;
127 if (wol->wolopts & WAKE_MAGICSECURE) {
128 phy_write_mmd(phydev, DP83822_DEVADDR,
130 (wol->sopass[1] << 8) | wol->sopass[0]);
131 phy_write_mmd(phydev, DP83822_DEVADDR,
133 (wol->sopass[3] << 8) | wol->sopass[2]);
134 phy_write_mmd(phydev, DP83822_DEVADDR,
136 (wol->sopass[5] << 8) | wol->sopass[4]);
137 value |= DP83822_WOL_SECURE_ON;
139 value &= ~DP83822_WOL_SECURE_ON;
142 value |= (DP83822_WOL_EN | DP83822_WOL_INDICATION_SEL |
143 DP83822_WOL_CLR_INDICATION);
144 phy_write_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_CFG,
147 value = phy_read_mmd(phydev, DP83822_DEVADDR,
148 MII_DP83822_WOL_CFG);
149 value &= ~DP83822_WOL_EN;
150 phy_write_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_CFG,
157 static void dp83822_get_wol(struct phy_device *phydev,
158 struct ethtool_wolinfo *wol)
163 wol->supported = (WAKE_MAGIC | WAKE_MAGICSECURE);
166 value = phy_read_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_CFG);
168 if (value & DP83822_WOL_MAGIC_EN)
169 wol->wolopts |= WAKE_MAGIC;
171 if (value & DP83822_WOL_SECURE_ON) {
172 sopass_val = phy_read_mmd(phydev, DP83822_DEVADDR,
174 wol->sopass[0] = (sopass_val & 0xff);
175 wol->sopass[1] = (sopass_val >> 8);
177 sopass_val = phy_read_mmd(phydev, DP83822_DEVADDR,
179 wol->sopass[2] = (sopass_val & 0xff);
180 wol->sopass[3] = (sopass_val >> 8);
182 sopass_val = phy_read_mmd(phydev, DP83822_DEVADDR,
184 wol->sopass[4] = (sopass_val & 0xff);
185 wol->sopass[5] = (sopass_val >> 8);
187 wol->wolopts |= WAKE_MAGICSECURE;
190 /* WoL is not enabled so set wolopts to 0 */
191 if (!(value & DP83822_WOL_EN))
195 static int dp83822_config_intr(struct phy_device *phydev)
201 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
202 misr_status = phy_read(phydev, MII_DP83822_MISR1);
206 misr_status |= (DP83822_ANEG_COMPLETE_INT_EN |
207 DP83822_DUP_MODE_CHANGE_INT_EN |
208 DP83822_SPEED_CHANGED_INT_EN |
209 DP83822_LINK_STAT_INT_EN |
210 DP83822_ENERGY_DET_INT_EN |
211 DP83822_LINK_QUAL_INT_EN);
213 err = phy_write(phydev, MII_DP83822_MISR1, misr_status);
217 misr_status = phy_read(phydev, MII_DP83822_MISR2);
221 misr_status |= (DP83822_JABBER_DET_INT_EN |
222 DP83822_WOL_PKT_INT_EN |
223 DP83822_SLEEP_MODE_INT_EN |
224 DP83822_MDI_XOVER_INT_EN |
225 DP83822_LB_FIFO_INT_EN |
226 DP83822_PAGE_RX_INT_EN |
227 DP83822_ANEG_ERR_INT_EN |
228 DP83822_EEE_ERROR_CHANGE_INT_EN);
230 err = phy_write(phydev, MII_DP83822_MISR2, misr_status);
234 physcr_status = phy_read(phydev, MII_DP83822_PHYSCR);
235 if (physcr_status < 0)
236 return physcr_status;
238 physcr_status |= DP83822_PHYSCR_INT_OE | DP83822_PHYSCR_INTEN;
241 err = phy_write(phydev, MII_DP83822_MISR1, 0);
245 err = phy_write(phydev, MII_DP83822_MISR2, 0);
249 physcr_status = phy_read(phydev, MII_DP83822_PHYSCR);
250 if (physcr_status < 0)
251 return physcr_status;
253 physcr_status &= ~DP83822_PHYSCR_INTEN;
256 return phy_write(phydev, MII_DP83822_PHYSCR, physcr_status);
259 static int dp83822_config_init(struct phy_device *phydev)
264 err = genphy_config_init(phydev);
268 value = DP83822_WOL_MAGIC_EN | DP83822_WOL_SECURE_ON | DP83822_WOL_EN;
270 return phy_write_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_CFG,
274 static int dp83822_phy_reset(struct phy_device *phydev)
278 err = phy_write(phydev, MII_DP83822_RESET_CTRL, DP83822_HW_RESET);
282 dp83822_config_init(phydev);
287 static int dp83822_suspend(struct phy_device *phydev)
291 value = phy_read_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_CFG);
293 if (!(value & DP83822_WOL_EN))
294 genphy_suspend(phydev);
299 static int dp83822_resume(struct phy_device *phydev)
303 genphy_resume(phydev);
305 value = phy_read_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_CFG);
307 phy_write_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_CFG, value |
308 DP83822_WOL_CLR_INDICATION);
313 static struct phy_driver dp83822_driver[] = {
315 .phy_id = DP83822_PHY_ID,
316 .phy_id_mask = 0xfffffff0,
317 .name = "TI DP83822",
318 .features = PHY_BASIC_FEATURES,
319 .flags = PHY_HAS_INTERRUPT,
320 .config_init = dp83822_config_init,
321 .soft_reset = dp83822_phy_reset,
322 .get_wol = dp83822_get_wol,
323 .set_wol = dp83822_set_wol,
324 .ack_interrupt = dp83822_ack_interrupt,
325 .config_intr = dp83822_config_intr,
326 .suspend = dp83822_suspend,
327 .resume = dp83822_resume,
330 module_phy_driver(dp83822_driver);
332 static struct mdio_device_id __maybe_unused dp83822_tbl[] = {
333 { DP83822_PHY_ID, 0xfffffff0 },
336 MODULE_DEVICE_TABLE(mdio, dp83822_tbl);
338 MODULE_DESCRIPTION("Texas Instruments DP83822 PHY driver");
339 MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com");
340 MODULE_LICENSE("GPL");