Commit | Line | Data |
---|---|---|
a2443fd1 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
812b5ca7 BE |
2 | /* |
3 | * Driver for the Renesas PHY uPD60620. | |
4 | * | |
5 | * Copyright (C) 2015 Softing Industrial Automation GmbH | |
812b5ca7 BE |
6 | */ |
7 | ||
8 | #include <linux/kernel.h> | |
9 | #include <linux/module.h> | |
10 | #include <linux/phy.h> | |
11 | ||
12 | #define UPD60620_PHY_ID 0xb8242824 | |
13 | ||
14 | /* Extended Registers and values */ | |
15 | /* PHY Special Control/Status */ | |
16 | #define PHY_PHYSCR 0x1F /* PHY.31 */ | |
17 | #define PHY_PHYSCR_10MB 0x0004 /* PHY speed = 10mb */ | |
18 | #define PHY_PHYSCR_100MB 0x0008 /* PHY speed = 100mb */ | |
19 | #define PHY_PHYSCR_DUPLEX 0x0010 /* PHY Duplex */ | |
20 | ||
21 | /* PHY Special Modes */ | |
22 | #define PHY_SPM 0x12 /* PHY.18 */ | |
23 | ||
24 | /* Init PHY */ | |
25 | ||
26 | static int upd60620_config_init(struct phy_device *phydev) | |
27 | { | |
28 | /* Enable support for passive HUBs (could be a strap option) */ | |
29 | /* PHYMODE: All speeds, HD in parallel detect */ | |
30 | return phy_write(phydev, PHY_SPM, 0x0180 | phydev->mdio.addr); | |
31 | } | |
32 | ||
33 | /* Get PHY status from common registers */ | |
34 | ||
35 | static int upd60620_read_status(struct phy_device *phydev) | |
36 | { | |
37 | int phy_state; | |
38 | ||
39 | /* Read negotiated state */ | |
40 | phy_state = phy_read(phydev, MII_BMSR); | |
41 | if (phy_state < 0) | |
42 | return phy_state; | |
43 | ||
44 | phydev->link = 0; | |
c0ec3c27 | 45 | linkmode_zero(phydev->lp_advertising); |
812b5ca7 BE |
46 | phydev->pause = 0; |
47 | phydev->asym_pause = 0; | |
48 | ||
49 | if (phy_state & (BMSR_ANEGCOMPLETE | BMSR_LSTATUS)) { | |
50 | phy_state = phy_read(phydev, PHY_PHYSCR); | |
51 | if (phy_state < 0) | |
52 | return phy_state; | |
53 | ||
54 | if (phy_state & (PHY_PHYSCR_10MB | PHY_PHYSCR_100MB)) { | |
55 | phydev->link = 1; | |
56 | phydev->speed = SPEED_10; | |
57 | phydev->duplex = DUPLEX_HALF; | |
58 | ||
59 | if (phy_state & PHY_PHYSCR_100MB) | |
60 | phydev->speed = SPEED_100; | |
61 | if (phy_state & PHY_PHYSCR_DUPLEX) | |
62 | phydev->duplex = DUPLEX_FULL; | |
63 | ||
64 | phy_state = phy_read(phydev, MII_LPA); | |
65 | if (phy_state < 0) | |
66 | return phy_state; | |
67 | ||
c0ec3c27 AL |
68 | mii_lpa_to_linkmode_lpa_t(phydev->lp_advertising, |
69 | phy_state); | |
812b5ca7 | 70 | |
af006240 | 71 | phy_resolve_aneg_pause(phydev); |
812b5ca7 BE |
72 | } |
73 | } | |
74 | return 0; | |
75 | } | |
76 | ||
77 | MODULE_DESCRIPTION("Renesas uPD60620 PHY driver"); | |
78 | MODULE_AUTHOR("Bernd Edlinger <bernd.edlinger@hotmail.de>"); | |
79 | MODULE_LICENSE("GPL"); | |
80 | ||
81 | static struct phy_driver upd60620_driver[1] = { { | |
82 | .phy_id = UPD60620_PHY_ID, | |
83 | .phy_id_mask = 0xfffffffe, | |
84 | .name = "Renesas uPD60620", | |
dcdecdcf | 85 | /* PHY_BASIC_FEATURES */ |
812b5ca7 BE |
86 | .flags = 0, |
87 | .config_init = upd60620_config_init, | |
812b5ca7 BE |
88 | .read_status = upd60620_read_status, |
89 | } }; | |
90 | ||
91 | module_phy_driver(upd60620_driver); | |
92 | ||
93 | static struct mdio_device_id __maybe_unused upd60620_tbl[] = { | |
94 | { UPD60620_PHY_ID, 0xfffffffe }, | |
95 | { } | |
96 | }; | |
97 | ||
98 | MODULE_DEVICE_TABLE(mdio, upd60620_tbl); |