xref: /openbmc/u-boot/drivers/net/phy/et1011c.c (revision e8f80a5a)
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * ET1011C PHY driver
4  *
5  * Derived from Linux kernel driver by Chaithrika U S
6  * Copyright (C) 2013, Texas Instruments, Incorporated - http://www.ti.com/
7  */
8 #include <config.h>
9 #include <phy.h>
10 
11 #define ET1011C_CONFIG_REG		(0x16)
12 #define ET1011C_TX_FIFO_MASK		(0x3 << 12)
13 #define ET1011C_TX_FIFO_DEPTH_8		(0x0 << 12)
14 #define ET1011C_TX_FIFO_DEPTH_16	(0x1 << 12)
15 #define ET1011C_INTERFACE_MASK		(0x7 << 0)
16 #define ET1011C_GMII_INTERFACE		(0x2 << 0)
17 #define ET1011C_SYS_CLK_EN		(0x1 << 4)
18 #define ET1011C_TX_CLK_EN		(0x1 << 5)
19 
20 #define ET1011C_STATUS_REG		(0x1A)
21 #define ET1011C_DUPLEX_STATUS		(0x1 << 7)
22 #define ET1011C_SPEED_MASK		(0x3 << 8)
23 #define ET1011C_SPEED_1000		(0x2 << 8)
24 #define ET1011C_SPEED_100		(0x1 << 8)
25 #define ET1011C_SPEED_10		(0x0 << 8)
26 
et1011c_config(struct phy_device * phydev)27 static int et1011c_config(struct phy_device *phydev)
28 {
29 	int ctl = 0;
30 	ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
31 	if (ctl < 0)
32 		return ctl;
33 	ctl &= ~(BMCR_FULLDPLX | BMCR_SPEED100 | BMCR_SPEED1000 |
34 		 BMCR_ANENABLE);
35 	/* First clear the PHY */
36 	phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl | BMCR_RESET);
37 
38 	return genphy_config_aneg(phydev);
39 }
40 
et1011c_parse_status(struct phy_device * phydev)41 static int et1011c_parse_status(struct phy_device *phydev)
42 {
43 	int mii_reg;
44 	int speed;
45 
46 	mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, ET1011C_STATUS_REG);
47 
48 	if (mii_reg & ET1011C_DUPLEX_STATUS)
49 		phydev->duplex = DUPLEX_FULL;
50 	else
51 		phydev->duplex = DUPLEX_HALF;
52 
53 	speed = mii_reg & ET1011C_SPEED_MASK;
54 	switch (speed) {
55 	case ET1011C_SPEED_1000:
56 		phydev->speed = SPEED_1000;
57 		mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, ET1011C_CONFIG_REG);
58 		mii_reg &= ~ET1011C_TX_FIFO_MASK;
59 		phy_write(phydev, MDIO_DEVAD_NONE, ET1011C_CONFIG_REG,
60 			  mii_reg |
61 			  ET1011C_GMII_INTERFACE |
62 			  ET1011C_SYS_CLK_EN |
63 #ifdef CONFIG_PHY_ET1011C_TX_CLK_FIX
64 			  ET1011C_TX_CLK_EN |
65 #endif
66 			  ET1011C_TX_FIFO_DEPTH_16);
67 		break;
68 	case ET1011C_SPEED_100:
69 		phydev->speed = SPEED_100;
70 		break;
71 	case ET1011C_SPEED_10:
72 		phydev->speed = SPEED_10;
73 		break;
74 	}
75 
76 	return 0;
77 }
78 
et1011c_startup(struct phy_device * phydev)79 static int et1011c_startup(struct phy_device *phydev)
80 {
81 	int ret;
82 
83 	ret = genphy_update_link(phydev);
84 	if (ret)
85 		return ret;
86 
87 	return et1011c_parse_status(phydev);
88 }
89 
90 static struct phy_driver et1011c_driver = {
91 	.name		= "ET1011C",
92 	.uid		= 0x0282f014,
93 	.mask		= 0xfffffff0,
94 	.features	= PHY_GBIT_FEATURES,
95 	.config		= &et1011c_config,
96 	.startup	= &et1011c_startup,
97 };
98 
phy_et1011c_init(void)99 int phy_et1011c_init(void)
100 {
101 	phy_register(&et1011c_driver);
102 
103 	return 0;
104 }
105