1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Davicom PHY drivers
4 *
5 * Copyright 2010-2011 Freescale Semiconductor, Inc.
6 * author Andy Fleming
7 */
8 #include <common.h>
9 #include <phy.h>
10
11 #define MIIM_DM9161_SCR 0x10
12 #define MIIM_DM9161_SCR_INIT 0x0610
13
14 /* DM9161 Specified Configuration and Status Register */
15 #define MIIM_DM9161_SCSR 0x11
16 #define MIIM_DM9161_SCSR_100F 0x8000
17 #define MIIM_DM9161_SCSR_100H 0x4000
18 #define MIIM_DM9161_SCSR_10F 0x2000
19 #define MIIM_DM9161_SCSR_10H 0x1000
20
21 /* DM9161 10BT Configuration/Status */
22 #define MIIM_DM9161_10BTCSR 0x12
23 #define MIIM_DM9161_10BTCSR_INIT 0x7800
24
25
26 /* Davicom DM9161E */
dm9161_config(struct phy_device * phydev)27 static int dm9161_config(struct phy_device *phydev)
28 {
29 phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, BMCR_ISOLATE);
30 /* Do not bypass the scrambler/descrambler */
31 phy_write(phydev, MDIO_DEVAD_NONE, MIIM_DM9161_SCR,
32 MIIM_DM9161_SCR_INIT);
33 /* Clear 10BTCSR to default */
34 phy_write(phydev, MDIO_DEVAD_NONE, MIIM_DM9161_10BTCSR,
35 MIIM_DM9161_10BTCSR_INIT);
36
37 genphy_config_aneg(phydev);
38
39 return 0;
40 }
41
dm9161_parse_status(struct phy_device * phydev)42 static int dm9161_parse_status(struct phy_device *phydev)
43 {
44 int mii_reg;
45
46 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_DM9161_SCSR);
47
48 if (mii_reg & (MIIM_DM9161_SCSR_100F | MIIM_DM9161_SCSR_100H))
49 phydev->speed = SPEED_100;
50 else
51 phydev->speed = SPEED_10;
52
53 if (mii_reg & (MIIM_DM9161_SCSR_100F | MIIM_DM9161_SCSR_10F))
54 phydev->duplex = DUPLEX_FULL;
55 else
56 phydev->duplex = DUPLEX_HALF;
57
58 return 0;
59 }
60
dm9161_startup(struct phy_device * phydev)61 static int dm9161_startup(struct phy_device *phydev)
62 {
63 int ret;
64
65 ret = genphy_update_link(phydev);
66 if (ret)
67 return ret;
68
69 return dm9161_parse_status(phydev);
70 }
71
72 static struct phy_driver DM9161_driver = {
73 .name = "Davicom DM9161E",
74 .uid = 0x181b880,
75 .mask = 0xffffff0,
76 .features = PHY_BASIC_FEATURES,
77 .config = &dm9161_config,
78 .startup = &dm9161_startup,
79 .shutdown = &genphy_shutdown,
80 };
81
phy_davicom_init(void)82 int phy_davicom_init(void)
83 {
84 phy_register(&DM9161_driver);
85
86 return 0;
87 }
88