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812b5ca7 BE |
1 | /* |
2 | * Driver for the Renesas PHY uPD60620. | |
3 | * | |
4 | * Copyright (C) 2015 Softing Industrial Automation GmbH | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <linux/kernel.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/phy.h> | |
16 | ||
17 | #define UPD60620_PHY_ID 0xb8242824 | |
18 | ||
19 | /* Extended Registers and values */ | |
20 | /* PHY Special Control/Status */ | |
21 | #define PHY_PHYSCR 0x1F /* PHY.31 */ | |
22 | #define PHY_PHYSCR_10MB 0x0004 /* PHY speed = 10mb */ | |
23 | #define PHY_PHYSCR_100MB 0x0008 /* PHY speed = 100mb */ | |
24 | #define PHY_PHYSCR_DUPLEX 0x0010 /* PHY Duplex */ | |
25 | ||
26 | /* PHY Special Modes */ | |
27 | #define PHY_SPM 0x12 /* PHY.18 */ | |
28 | ||
29 | /* Init PHY */ | |
30 | ||
31 | static int upd60620_config_init(struct phy_device *phydev) | |
32 | { | |
33 | /* Enable support for passive HUBs (could be a strap option) */ | |
34 | /* PHYMODE: All speeds, HD in parallel detect */ | |
35 | return phy_write(phydev, PHY_SPM, 0x0180 | phydev->mdio.addr); | |
36 | } | |
37 | ||
38 | /* Get PHY status from common registers */ | |
39 | ||
40 | static int upd60620_read_status(struct phy_device *phydev) | |
41 | { | |
42 | int phy_state; | |
43 | ||
44 | /* Read negotiated state */ | |
45 | phy_state = phy_read(phydev, MII_BMSR); | |
46 | if (phy_state < 0) | |
47 | return phy_state; | |
48 | ||
49 | phydev->link = 0; | |
c0ec3c27 | 50 | linkmode_zero(phydev->lp_advertising); |
812b5ca7 BE |
51 | phydev->pause = 0; |
52 | phydev->asym_pause = 0; | |
53 | ||
54 | if (phy_state & (BMSR_ANEGCOMPLETE | BMSR_LSTATUS)) { | |
55 | phy_state = phy_read(phydev, PHY_PHYSCR); | |
56 | if (phy_state < 0) | |
57 | return phy_state; | |
58 | ||
59 | if (phy_state & (PHY_PHYSCR_10MB | PHY_PHYSCR_100MB)) { | |
60 | phydev->link = 1; | |
61 | phydev->speed = SPEED_10; | |
62 | phydev->duplex = DUPLEX_HALF; | |
63 | ||
64 | if (phy_state & PHY_PHYSCR_100MB) | |
65 | phydev->speed = SPEED_100; | |
66 | if (phy_state & PHY_PHYSCR_DUPLEX) | |
67 | phydev->duplex = DUPLEX_FULL; | |
68 | ||
69 | phy_state = phy_read(phydev, MII_LPA); | |
70 | if (phy_state < 0) | |
71 | return phy_state; | |
72 | ||
c0ec3c27 AL |
73 | mii_lpa_to_linkmode_lpa_t(phydev->lp_advertising, |
74 | phy_state); | |
812b5ca7 BE |
75 | |
76 | if (phydev->duplex == DUPLEX_FULL) { | |
77 | if (phy_state & LPA_PAUSE_CAP) | |
78 | phydev->pause = 1; | |
79 | if (phy_state & LPA_PAUSE_ASYM) | |
80 | phydev->asym_pause = 1; | |
81 | } | |
82 | } | |
83 | } | |
84 | return 0; | |
85 | } | |
86 | ||
87 | MODULE_DESCRIPTION("Renesas uPD60620 PHY driver"); | |
88 | MODULE_AUTHOR("Bernd Edlinger <bernd.edlinger@hotmail.de>"); | |
89 | MODULE_LICENSE("GPL"); | |
90 | ||
91 | static struct phy_driver upd60620_driver[1] = { { | |
92 | .phy_id = UPD60620_PHY_ID, | |
93 | .phy_id_mask = 0xfffffffe, | |
94 | .name = "Renesas uPD60620", | |
95 | .features = PHY_BASIC_FEATURES, | |
96 | .flags = 0, | |
97 | .config_init = upd60620_config_init, | |
812b5ca7 BE |
98 | .read_status = upd60620_read_status, |
99 | } }; | |
100 | ||
101 | module_phy_driver(upd60620_driver); | |
102 | ||
103 | static struct mdio_device_id __maybe_unused upd60620_tbl[] = { | |
104 | { UPD60620_PHY_ID, 0xfffffffe }, | |
105 | { } | |
106 | }; | |
107 | ||
108 | MODULE_DEVICE_TABLE(mdio, upd60620_tbl); |