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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / 8a1292ce3e21205645a155b23ac083a3fc6b64c1 / . / drivers / net / phy / xilinx_gmii2rgmii.c
blob: e2feb17048cc3b3a025c7b5dff8facd94071c053 [file] [log] [blame]
Siva Durga Prasad Paladuguf41e5882018-11-27 11:49:11 +0530[diff] [blame]1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Xilinx GMII2RGMII phy driver
4 *
5 * Copyright (C) 2018 Xilinx, Inc.
6 */
7
8#include <dm.h>
Simon Glassf7ae49f2020-05-10 11:40:05 -0600[diff] [blame]9#include <log.h>
Siva Durga Prasad Paladuguf41e5882018-11-27 11:49:11 +0530[diff] [blame]10#include <phy.h>
11#include <config.h>
12#include <common.h>
13
14DECLARE_GLOBAL_DATA_PTR;
15
16#define ZYNQ_GMII2RGMII_REG 0x10
17#define ZYNQ_GMII2RGMII_SPEED_MASK (BMCR_SPEED1000 | BMCR_SPEED100)
18
19static int xilinxgmiitorgmii_config(struct phy_device *phydev)
20{
21 struct phy_device *ext_phydev = phydev->priv;
22
23 debug("%s\n", __func__);
24 if (ext_phydev->drv->config)
25 ext_phydev->drv->config(ext_phydev);
26
27 return 0;
28}
29
30static int xilinxgmiitorgmii_extread(struct phy_device *phydev, int addr,
31 int devaddr, int regnum)
32{
33 struct phy_device *ext_phydev = phydev->priv;
34
35 debug("%s\n", __func__);
36 if (ext_phydev->drv->readext)
37 ext_phydev->drv->readext(ext_phydev, addr, devaddr, regnum);
38
39 return 0;
40}
41
42static int xilinxgmiitorgmii_extwrite(struct phy_device *phydev, int addr,
43 int devaddr, int regnum, u16 val)
44
45{
46 struct phy_device *ext_phydev = phydev->priv;
47
48 debug("%s\n", __func__);
49 if (ext_phydev->drv->writeext)
50 ext_phydev->drv->writeext(ext_phydev, addr, devaddr, regnum,
51 val);
52
53 return 0;
54}
55
56static int xilinxgmiitorgmii_startup(struct phy_device *phydev)
57{
58 u16 val = 0;
59 struct phy_device *ext_phydev = phydev->priv;
60
61 debug("%s\n", __func__);
62 ext_phydev->dev = phydev->dev;
63 if (ext_phydev->drv->startup)
64 ext_phydev->drv->startup(ext_phydev);
65
66 val = phy_read(phydev, phydev->addr, ZYNQ_GMII2RGMII_REG);
67 val &= ~ZYNQ_GMII2RGMII_SPEED_MASK;
68
69 if (ext_phydev->speed == SPEED_1000)
70 val |= BMCR_SPEED1000;
71 else if (ext_phydev->speed == SPEED_100)
72 val |= BMCR_SPEED100;
73
74 phy_write(phydev, phydev->addr, ZYNQ_GMII2RGMII_REG, val |
75 BMCR_FULLDPLX);
76
77 phydev->duplex = ext_phydev->duplex;
78 phydev->speed = ext_phydev->speed;
79 phydev->link = ext_phydev->link;
80
81 return 0;
82}
83
84static int xilinxgmiitorgmii_probe(struct phy_device *phydev)
85{
86 int ofnode = phydev->addr;
87 u32 phy_of_handle;
88 int ext_phyaddr = -1;
89 struct phy_device *ext_phydev;
90
91 debug("%s\n", __func__);
92
93 if (phydev->interface != PHY_INTERFACE_MODE_GMII) {
94 printf("Incorrect interface type\n");
95 return -EINVAL;
96 }
97
98 /*
99 * Read the phy address again as the one we read in ethernet driver
100 * was overwritten for the purpose of storing the ofnode
101 */
102 phydev->addr = fdtdec_get_int(gd->fdt_blob, ofnode, "reg", -1);
103 phy_of_handle = fdtdec_lookup_phandle(gd->fdt_blob, ofnode,
104 "phy-handle");
105 if (phy_of_handle > 0)
106 ext_phyaddr = fdtdec_get_int(gd->fdt_blob,
107 phy_of_handle,
108 "reg", -1);
109 ext_phydev = phy_find_by_mask(phydev->bus,
110 1 << ext_phyaddr,
111 PHY_INTERFACE_MODE_RGMII);
112 if (!ext_phydev) {
113 printf("%s, No external phy device found\n", __func__);
114 return -EINVAL;
115 }
116
117 ext_phydev->node = offset_to_ofnode(phy_of_handle);
118 phydev->priv = ext_phydev;
119
120 debug("%s, gmii2rgmmi:0x%x, extphy:0x%x\n", __func__, phydev->addr,
121 ext_phyaddr);
122
123 phydev->flags |= PHY_FLAG_BROKEN_RESET;
124
125 return 0;
126}
127
128static struct phy_driver gmii2rgmii_driver = {
129 .name = "XILINX GMII2RGMII",
130 .uid = PHY_GMII2RGMII_ID,
131 .mask = 0xffffffff,
132 .features = PHY_GBIT_FEATURES,
133 .probe = xilinxgmiitorgmii_probe,
134 .config = xilinxgmiitorgmii_config,
135 .startup = xilinxgmiitorgmii_startup,
136 .writeext = xilinxgmiitorgmii_extwrite,
137 .readext = xilinxgmiitorgmii_extread,
138};
139
140int phy_xilinx_gmii2rgmii_init(void)
141{
142 phy_register(&gmii2rgmii_driver);
143
144 return 0;
145}