1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0+
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Driver for the Renesas PHY uPD60620.
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2015 Softing Industrial Automation GmbH
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/kernel.h>
9*4882a593Smuzhiyun #include <linux/module.h>
10*4882a593Smuzhiyun #include <linux/phy.h>
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #define UPD60620_PHY_ID 0xb8242824
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun /* Extended Registers and values */
15*4882a593Smuzhiyun /* PHY Special Control/Status */
16*4882a593Smuzhiyun #define PHY_PHYSCR 0x1F /* PHY.31 */
17*4882a593Smuzhiyun #define PHY_PHYSCR_10MB 0x0004 /* PHY speed = 10mb */
18*4882a593Smuzhiyun #define PHY_PHYSCR_100MB 0x0008 /* PHY speed = 100mb */
19*4882a593Smuzhiyun #define PHY_PHYSCR_DUPLEX 0x0010 /* PHY Duplex */
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun /* PHY Special Modes */
22*4882a593Smuzhiyun #define PHY_SPM 0x12 /* PHY.18 */
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun /* Init PHY */
25*4882a593Smuzhiyun
upd60620_config_init(struct phy_device * phydev)26*4882a593Smuzhiyun static int upd60620_config_init(struct phy_device *phydev)
27*4882a593Smuzhiyun {
28*4882a593Smuzhiyun /* Enable support for passive HUBs (could be a strap option) */
29*4882a593Smuzhiyun /* PHYMODE: All speeds, HD in parallel detect */
30*4882a593Smuzhiyun return phy_write(phydev, PHY_SPM, 0x0180 | phydev->mdio.addr);
31*4882a593Smuzhiyun }
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun /* Get PHY status from common registers */
34*4882a593Smuzhiyun
upd60620_read_status(struct phy_device * phydev)35*4882a593Smuzhiyun static int upd60620_read_status(struct phy_device *phydev)
36*4882a593Smuzhiyun {
37*4882a593Smuzhiyun int phy_state;
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun /* Read negotiated state */
40*4882a593Smuzhiyun phy_state = phy_read(phydev, MII_BMSR);
41*4882a593Smuzhiyun if (phy_state < 0)
42*4882a593Smuzhiyun return phy_state;
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun phydev->link = 0;
45*4882a593Smuzhiyun linkmode_zero(phydev->lp_advertising);
46*4882a593Smuzhiyun phydev->pause = 0;
47*4882a593Smuzhiyun phydev->asym_pause = 0;
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun if (phy_state & (BMSR_ANEGCOMPLETE | BMSR_LSTATUS)) {
50*4882a593Smuzhiyun phy_state = phy_read(phydev, PHY_PHYSCR);
51*4882a593Smuzhiyun if (phy_state < 0)
52*4882a593Smuzhiyun return phy_state;
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun if (phy_state & (PHY_PHYSCR_10MB | PHY_PHYSCR_100MB)) {
55*4882a593Smuzhiyun phydev->link = 1;
56*4882a593Smuzhiyun phydev->speed = SPEED_10;
57*4882a593Smuzhiyun phydev->duplex = DUPLEX_HALF;
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun if (phy_state & PHY_PHYSCR_100MB)
60*4882a593Smuzhiyun phydev->speed = SPEED_100;
61*4882a593Smuzhiyun if (phy_state & PHY_PHYSCR_DUPLEX)
62*4882a593Smuzhiyun phydev->duplex = DUPLEX_FULL;
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun phy_state = phy_read(phydev, MII_LPA);
65*4882a593Smuzhiyun if (phy_state < 0)
66*4882a593Smuzhiyun return phy_state;
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun mii_lpa_to_linkmode_lpa_t(phydev->lp_advertising,
69*4882a593Smuzhiyun phy_state);
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun phy_resolve_aneg_pause(phydev);
72*4882a593Smuzhiyun }
73*4882a593Smuzhiyun }
74*4882a593Smuzhiyun return 0;
75*4882a593Smuzhiyun }
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun MODULE_DESCRIPTION("Renesas uPD60620 PHY driver");
78*4882a593Smuzhiyun MODULE_AUTHOR("Bernd Edlinger <bernd.edlinger@hotmail.de>");
79*4882a593Smuzhiyun MODULE_LICENSE("GPL");
80*4882a593Smuzhiyun
81*4882a593Smuzhiyun static struct phy_driver upd60620_driver[1] = { {
82*4882a593Smuzhiyun .phy_id = UPD60620_PHY_ID,
83*4882a593Smuzhiyun .phy_id_mask = 0xfffffffe,
84*4882a593Smuzhiyun .name = "Renesas uPD60620",
85*4882a593Smuzhiyun /* PHY_BASIC_FEATURES */
86*4882a593Smuzhiyun .flags = 0,
87*4882a593Smuzhiyun .config_init = upd60620_config_init,
88*4882a593Smuzhiyun .read_status = upd60620_read_status,
89*4882a593Smuzhiyun } };
90*4882a593Smuzhiyun
91*4882a593Smuzhiyun module_phy_driver(upd60620_driver);
92*4882a593Smuzhiyun
93*4882a593Smuzhiyun static struct mdio_device_id __maybe_unused upd60620_tbl[] = {
94*4882a593Smuzhiyun { UPD60620_PHY_ID, 0xfffffffe },
95*4882a593Smuzhiyun { }
96*4882a593Smuzhiyun };
97*4882a593Smuzhiyun
98*4882a593Smuzhiyun MODULE_DEVICE_TABLE(mdio, upd60620_tbl);
99