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