net/phy/dp83tg720.c

1 // SPDX-License-Identifier: GPL-2.0
2 /* Driver for the Texas Instruments DP83TG720 PHY
9 #include <linux/phy.h>
58 /* In RGMII mode, Enable or disable the internal delay for RXD */
60 /* In RGMII mode, Enable or disable the internal delay for TXD */
73  * dp83tg720_cable_test_start - Start the cable test for the DP83TG720 PHY.
76  * This sequence is based on the documented procedure for the DP83TG720 PHY.
84 	/* Initialize the PHY to run the TDR test as described in the  in dp83tg720_cable_test_start()
85 	 * "DP83TG720S-Q1: Configuring for Open Alliance Specification  in dp83tg720_cable_test_start()
132  * dp83tg720_cable_test_get_status - Get the status of the cable test for the
133  *                                   DP83TG720 PHY.
157 	/* Check for TDR test failure */  in dp83tg720_cable_test_get_status()
192 	/* Autoneg is not supported and this PHY supports only one speed.  in dp83tg720_config_aneg()
193 	 * We need to care only about master/slave configuration if it was  in dp83tg720_config_aneg()
200 	/* Re-read role configuration to make changes visible even if  in dp83tg720_config_aneg()
211 	phydev->pause = 0;  in dp83tg720_read_status()
212 	phydev->asym_pause = 0;  in dp83tg720_read_status()
218 	phydev->link = !!(phy_sts & DP83TG720S_LINK_STATUS);  in dp83tg720_read_status()
219 	if (!phydev->link) {  in dp83tg720_read_status()
221 		 * Implementation Guide", the PHY needs to be reset after a  in dp83tg720_read_status()
225 		 * interval, which is still enough for not automotive use cases.  in dp83tg720_read_status()
231 		/* After HW reset we need to restore master/slave configuration.  in dp83tg720_read_status()
239 		phydev->speed = SPEED_UNKNOWN;  in dp83tg720_read_status()
240 		phydev->duplex = DUPLEX_UNKNOWN;  in dp83tg720_read_status()
250 		phydev->duplex = DUPLEX_FULL;  in dp83tg720_read_status()
251 		phydev->speed = SPEED_1000;  in dp83tg720_read_status()
261 	if (!phydev->link)  in dp83tg720_get_sqi()
281 	switch (phydev->interface) {  in dp83tg720_config_rgmii_delay()
319 	 * The wait value of one 1ms is documented in "DP83TG720S-Q1 1000BASE-T1  in dp83tg720_config_init()
320 	 * Automotive Ethernet PHY with SGMII and RGMII" datasheet.  in dp83tg720_config_init()
330 	/* In case the PHY is bootstrapped in managed mode, we need to  in dp83tg720_config_init()
331 	 * wake it.  in dp83tg720_config_init()
338 	/* Make role configuration visible for ethtool on init and after  in dp83tg720_config_init()
370 MODULE_DESCRIPTION("Texas Instruments DP83TG720S PHY driver");