xref: /openbmc/u-boot/drivers/net/phy/et1011c.c (revision 54c57ae0)
1 /*
2  * ET1011C PHY driver
3  *
4  * Derived from Linux kernel driver by Chaithrika U S
5  * Copyright (C) 2013, Texas Instruments, Incorporated - http://www.ti.com/
6  *
7  * SPDX-License-Identifier:	GPL-2.0+
8  */
9 #include <config.h>
10 #include <phy.h>
11 
12 #define ET1011C_CONFIG_REG		(0x16)
13 #define ET1011C_TX_FIFO_MASK		(0x3 << 12)
14 #define ET1011C_TX_FIFO_DEPTH_8		(0x0 << 12)
15 #define ET1011C_TX_FIFO_DEPTH_16	(0x1 << 12)
16 #define ET1011C_INTERFACE_MASK		(0x7 << 0)
17 #define ET1011C_GMII_INTERFACE		(0x2 << 0)
18 #define ET1011C_SYS_CLK_EN		(0x1 << 4)
19 #define ET1011C_TX_CLK_EN		(0x1 << 5)
20 
21 #define ET1011C_STATUS_REG		(0x1A)
22 #define ET1011C_DUPLEX_STATUS		(0x1 << 7)
23 #define ET1011C_SPEED_MASK		(0x3 << 8)
24 #define ET1011C_SPEED_1000		(0x2 << 8)
25 #define ET1011C_SPEED_100		(0x1 << 8)
26 #define ET1011C_SPEED_10		(0x0 << 8)
27 
28 static int et1011c_config(struct phy_device *phydev)
29 {
30 	int ctl = 0;
31 	ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
32 	if (ctl < 0)
33 		return ctl;
34 	ctl &= ~(BMCR_FULLDPLX | BMCR_SPEED100 | BMCR_SPEED1000 |
35 		 BMCR_ANENABLE);
36 	/* First clear the PHY */
37 	phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl | BMCR_RESET);
38 
39 	return genphy_config_aneg(phydev);
40 }
41 
42 static int et1011c_parse_status(struct phy_device *phydev)
43 {
44 	int mii_reg;
45 	int speed;
46 
47 	mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, ET1011C_STATUS_REG);
48 
49 	if (mii_reg & ET1011C_DUPLEX_STATUS)
50 		phydev->duplex = DUPLEX_FULL;
51 	else
52 		phydev->duplex = DUPLEX_HALF;
53 
54 	speed = mii_reg & ET1011C_SPEED_MASK;
55 	switch (speed) {
56 	case ET1011C_SPEED_1000:
57 		phydev->speed = SPEED_1000;
58 		mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, ET1011C_CONFIG_REG);
59 		mii_reg &= ~ET1011C_TX_FIFO_MASK;
60 		phy_write(phydev, MDIO_DEVAD_NONE, ET1011C_CONFIG_REG,
61 			  mii_reg |
62 			  ET1011C_GMII_INTERFACE |
63 			  ET1011C_SYS_CLK_EN |
64 #ifdef CONFIG_PHY_ET1011C_TX_CLK_FIX
65 			  ET1011C_TX_CLK_EN |
66 #endif
67 			  ET1011C_TX_FIFO_DEPTH_16);
68 		break;
69 	case ET1011C_SPEED_100:
70 		phydev->speed = SPEED_100;
71 		break;
72 	case ET1011C_SPEED_10:
73 		phydev->speed = SPEED_10;
74 		break;
75 	}
76 
77 	return 0;
78 }
79 
80 static int et1011c_startup(struct phy_device *phydev)
81 {
82 	int ret;
83 
84 	ret = genphy_update_link(phydev);
85 	if (ret)
86 		return ret;
87 
88 	return et1011c_parse_status(phydev);
89 }
90 
91 static struct phy_driver et1011c_driver = {
92 	.name		= "ET1011C",
93 	.uid		= 0x0282f014,
94 	.mask		= 0xfffffff0,
95 	.features	= PHY_GBIT_FEATURES,
96 	.config		= &et1011c_config,
97 	.startup	= &et1011c_startup,
98 };
99 
100 int phy_et1011c_init(void)
101 {
102 	phy_register(&et1011c_driver);
103 
104 	return 0;
105 }
106