1 // SPDX-License-Identifier: GPL-2.0
3 * Driver for the Texas Instruments DP83TC811 PHY
5 * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
9 #include <linux/ethtool.h>
10 #include <linux/etherdevice.h>
11 #include <linux/kernel.h>
12 #include <linux/mii.h>
13 #include <linux/module.h>
15 #include <linux/phy.h>
16 #include <linux/netdevice.h>
18 #define DP83TC811_PHY_ID 0x2000a253
19 #define DP83811_DEVADDR 0x1f
21 #define MII_DP83811_SGMII_CTRL 0x09
22 #define MII_DP83811_INT_STAT1 0x12
23 #define MII_DP83811_INT_STAT2 0x13
24 #define MII_DP83811_INT_STAT3 0x18
25 #define MII_DP83811_RESET_CTRL 0x1f
27 #define DP83811_HW_RESET BIT(15)
28 #define DP83811_SW_RESET BIT(14)
31 #define DP83811_RX_ERR_HF_INT_EN BIT(0)
32 #define DP83811_MS_TRAINING_INT_EN BIT(1)
33 #define DP83811_ANEG_COMPLETE_INT_EN BIT(2)
34 #define DP83811_ESD_EVENT_INT_EN BIT(3)
35 #define DP83811_WOL_INT_EN BIT(4)
36 #define DP83811_LINK_STAT_INT_EN BIT(5)
37 #define DP83811_ENERGY_DET_INT_EN BIT(6)
38 #define DP83811_LINK_QUAL_INT_EN BIT(7)
41 #define DP83811_JABBER_DET_INT_EN BIT(0)
42 #define DP83811_POLARITY_INT_EN BIT(1)
43 #define DP83811_SLEEP_MODE_INT_EN BIT(2)
44 #define DP83811_OVERTEMP_INT_EN BIT(3)
45 #define DP83811_OVERVOLTAGE_INT_EN BIT(6)
46 #define DP83811_UNDERVOLTAGE_INT_EN BIT(7)
49 #define DP83811_LPS_INT_EN BIT(0)
50 #define DP83811_NO_FRAME_INT_EN BIT(3)
51 #define DP83811_POR_DONE_INT_EN BIT(4)
53 #define MII_DP83811_RXSOP1 0x04a5
54 #define MII_DP83811_RXSOP2 0x04a6
55 #define MII_DP83811_RXSOP3 0x04a7
58 #define MII_DP83811_WOL_CFG 0x04a0
59 #define MII_DP83811_WOL_STAT 0x04a1
60 #define MII_DP83811_WOL_DA1 0x04a2
61 #define MII_DP83811_WOL_DA2 0x04a3
62 #define MII_DP83811_WOL_DA3 0x04a4
65 #define DP83811_WOL_MAGIC_EN BIT(0)
66 #define DP83811_WOL_SECURE_ON BIT(5)
67 #define DP83811_WOL_EN BIT(7)
68 #define DP83811_WOL_INDICATION_SEL BIT(8)
69 #define DP83811_WOL_CLR_INDICATION BIT(11)
72 #define DP83811_TDR_AUTO BIT(8)
73 #define DP83811_SGMII_EN BIT(12)
74 #define DP83811_SGMII_AUTO_NEG_EN BIT(13)
75 #define DP83811_SGMII_TX_ERR_DIS BIT(14)
76 #define DP83811_SGMII_SOFT_RESET BIT(15)
78 static int dp83811_ack_interrupt(struct phy_device *phydev)
82 err = phy_read(phydev, MII_DP83811_INT_STAT1);
86 err = phy_read(phydev, MII_DP83811_INT_STAT2);
90 err = phy_read(phydev, MII_DP83811_INT_STAT3);
97 static int dp83811_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 * 811 PHYs store bytes 4|5, 2|3, 0|1
113 phy_write_mmd(phydev, DP83811_DEVADDR, MII_DP83811_WOL_DA1,
114 (mac[1] << 8) | mac[0]);
115 phy_write_mmd(phydev, DP83811_DEVADDR, MII_DP83811_WOL_DA2,
116 (mac[3] << 8) | mac[2]);
117 phy_write_mmd(phydev, DP83811_DEVADDR, MII_DP83811_WOL_DA3,
118 (mac[5] << 8) | mac[4]);
120 value = phy_read_mmd(phydev, DP83811_DEVADDR,
121 MII_DP83811_WOL_CFG);
122 if (wol->wolopts & WAKE_MAGIC)
123 value |= DP83811_WOL_MAGIC_EN;
125 value &= ~DP83811_WOL_MAGIC_EN;
127 if (wol->wolopts & WAKE_MAGICSECURE) {
128 phy_write_mmd(phydev, DP83811_DEVADDR,
130 (wol->sopass[1] << 8) | wol->sopass[0]);
131 phy_write_mmd(phydev, DP83811_DEVADDR,
133 (wol->sopass[3] << 8) | wol->sopass[2]);
134 phy_write_mmd(phydev, DP83811_DEVADDR,
136 (wol->sopass[5] << 8) | wol->sopass[4]);
137 value |= DP83811_WOL_SECURE_ON;
139 value &= ~DP83811_WOL_SECURE_ON;
142 /* Clear any pending WoL interrupt */
143 phy_read(phydev, MII_DP83811_INT_STAT1);
145 value |= DP83811_WOL_EN | DP83811_WOL_INDICATION_SEL |
146 DP83811_WOL_CLR_INDICATION;
148 return phy_write_mmd(phydev, DP83811_DEVADDR,
149 MII_DP83811_WOL_CFG, value);
151 return phy_clear_bits_mmd(phydev, DP83811_DEVADDR,
152 MII_DP83811_WOL_CFG, DP83811_WOL_EN);
157 static void dp83811_get_wol(struct phy_device *phydev,
158 struct ethtool_wolinfo *wol)
163 wol->supported = (WAKE_MAGIC | WAKE_MAGICSECURE);
166 value = phy_read_mmd(phydev, DP83811_DEVADDR, MII_DP83811_WOL_CFG);
168 if (value & DP83811_WOL_MAGIC_EN)
169 wol->wolopts |= WAKE_MAGIC;
171 if (value & DP83811_WOL_SECURE_ON) {
172 sopass_val = phy_read_mmd(phydev, DP83811_DEVADDR,
174 wol->sopass[0] = (sopass_val & 0xff);
175 wol->sopass[1] = (sopass_val >> 8);
177 sopass_val = phy_read_mmd(phydev, DP83811_DEVADDR,
179 wol->sopass[2] = (sopass_val & 0xff);
180 wol->sopass[3] = (sopass_val >> 8);
182 sopass_val = phy_read_mmd(phydev, DP83811_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 & DP83811_WOL_EN))
195 static int dp83811_config_intr(struct phy_device *phydev)
197 int misr_status, err;
199 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
200 err = dp83811_ack_interrupt(phydev);
204 misr_status = phy_read(phydev, MII_DP83811_INT_STAT1);
208 misr_status |= (DP83811_RX_ERR_HF_INT_EN |
209 DP83811_MS_TRAINING_INT_EN |
210 DP83811_ANEG_COMPLETE_INT_EN |
211 DP83811_ESD_EVENT_INT_EN |
213 DP83811_LINK_STAT_INT_EN |
214 DP83811_ENERGY_DET_INT_EN |
215 DP83811_LINK_QUAL_INT_EN);
217 err = phy_write(phydev, MII_DP83811_INT_STAT1, misr_status);
221 misr_status = phy_read(phydev, MII_DP83811_INT_STAT2);
225 misr_status |= (DP83811_JABBER_DET_INT_EN |
226 DP83811_POLARITY_INT_EN |
227 DP83811_SLEEP_MODE_INT_EN |
228 DP83811_OVERTEMP_INT_EN |
229 DP83811_OVERVOLTAGE_INT_EN |
230 DP83811_UNDERVOLTAGE_INT_EN);
232 err = phy_write(phydev, MII_DP83811_INT_STAT2, misr_status);
236 misr_status = phy_read(phydev, MII_DP83811_INT_STAT3);
240 misr_status |= (DP83811_LPS_INT_EN |
241 DP83811_NO_FRAME_INT_EN |
242 DP83811_POR_DONE_INT_EN);
244 err = phy_write(phydev, MII_DP83811_INT_STAT3, misr_status);
247 err = phy_write(phydev, MII_DP83811_INT_STAT1, 0);
251 err = phy_write(phydev, MII_DP83811_INT_STAT2, 0);
255 err = phy_write(phydev, MII_DP83811_INT_STAT3, 0);
259 err = dp83811_ack_interrupt(phydev);
265 static irqreturn_t dp83811_handle_interrupt(struct phy_device *phydev)
267 bool trigger_machine = false;
270 /* The INT_STAT registers 1, 2 and 3 are holding the interrupt status
271 * in the upper half (15:8), while the lower half (7:0) is used for
272 * controlling the interrupt enable state of those individual interrupt
273 * sources. To determine the possible interrupt sources, just read the
274 * INT_STAT* register and use it directly to know which interrupts have
275 * been enabled previously or not.
277 irq_status = phy_read(phydev, MII_DP83811_INT_STAT1);
278 if (irq_status < 0) {
282 if (irq_status & ((irq_status & GENMASK(7, 0)) << 8))
283 trigger_machine = true;
285 irq_status = phy_read(phydev, MII_DP83811_INT_STAT2);
286 if (irq_status < 0) {
290 if (irq_status & ((irq_status & GENMASK(7, 0)) << 8))
291 trigger_machine = true;
293 irq_status = phy_read(phydev, MII_DP83811_INT_STAT3);
294 if (irq_status < 0) {
298 if (irq_status & ((irq_status & GENMASK(7, 0)) << 8))
299 trigger_machine = true;
301 if (!trigger_machine)
304 phy_trigger_machine(phydev);
309 static int dp83811_config_aneg(struct phy_device *phydev)
313 if (phydev->interface == PHY_INTERFACE_MODE_SGMII) {
314 value = phy_read(phydev, MII_DP83811_SGMII_CTRL);
315 if (phydev->autoneg == AUTONEG_ENABLE) {
316 err = phy_write(phydev, MII_DP83811_SGMII_CTRL,
317 (DP83811_SGMII_AUTO_NEG_EN | value));
321 err = phy_write(phydev, MII_DP83811_SGMII_CTRL,
322 (~DP83811_SGMII_AUTO_NEG_EN & value));
328 return genphy_config_aneg(phydev);
331 static int dp83811_config_init(struct phy_device *phydev)
335 value = phy_read(phydev, MII_DP83811_SGMII_CTRL);
336 if (phydev->interface == PHY_INTERFACE_MODE_SGMII) {
337 err = phy_write(phydev, MII_DP83811_SGMII_CTRL,
338 (DP83811_SGMII_EN | value));
340 err = phy_write(phydev, MII_DP83811_SGMII_CTRL,
341 (~DP83811_SGMII_EN & value));
348 value = DP83811_WOL_MAGIC_EN | DP83811_WOL_SECURE_ON | DP83811_WOL_EN;
350 return phy_clear_bits_mmd(phydev, DP83811_DEVADDR, MII_DP83811_WOL_CFG,
354 static int dp83811_phy_reset(struct phy_device *phydev)
358 err = phy_write(phydev, MII_DP83811_RESET_CTRL, DP83811_HW_RESET);
365 static int dp83811_suspend(struct phy_device *phydev)
369 value = phy_read_mmd(phydev, DP83811_DEVADDR, MII_DP83811_WOL_CFG);
371 if (!(value & DP83811_WOL_EN))
372 genphy_suspend(phydev);
377 static int dp83811_resume(struct phy_device *phydev)
379 genphy_resume(phydev);
381 phy_set_bits_mmd(phydev, DP83811_DEVADDR, MII_DP83811_WOL_CFG,
382 DP83811_WOL_CLR_INDICATION);
387 static struct phy_driver dp83811_driver[] = {
389 .phy_id = DP83TC811_PHY_ID,
390 .phy_id_mask = 0xfffffff0,
391 .name = "TI DP83TC811",
392 /* PHY_BASIC_FEATURES */
393 .config_init = dp83811_config_init,
394 .config_aneg = dp83811_config_aneg,
395 .soft_reset = dp83811_phy_reset,
396 .get_wol = dp83811_get_wol,
397 .set_wol = dp83811_set_wol,
398 .config_intr = dp83811_config_intr,
399 .handle_interrupt = dp83811_handle_interrupt,
400 .suspend = dp83811_suspend,
401 .resume = dp83811_resume,
404 module_phy_driver(dp83811_driver);
406 static struct mdio_device_id __maybe_unused dp83811_tbl[] = {
407 { DP83TC811_PHY_ID, 0xfffffff0 },
410 MODULE_DEVICE_TABLE(mdio, dp83811_tbl);
412 MODULE_DESCRIPTION("Texas Instruments DP83TC811 PHY driver");
413 MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com");
414 MODULE_LICENSE("GPL");