1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* |
3 | * Driver for the Renesas PHY uPD60620. |
4 | * |
5 | * Copyright (C) 2015 Softing Industrial Automation GmbH |
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, val: 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; |
45 | linkmode_zero(dst: phydev->lp_advertising); |
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 | |
68 | mii_lpa_to_linkmode_lpa_t(lp_advertising: phydev->lp_advertising, |
69 | lpa: phy_state); |
70 | |
71 | phy_resolve_aneg_pause(phydev); |
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" , |
85 | /* PHY_BASIC_FEATURES */ |
86 | .flags = 0, |
87 | .config_init = upd60620_config_init, |
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); |
99 | |