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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / 5b7239860830dab2ed47814875729f06109725df / . / drivers / net / dwmac_socfpga.c
blob: 08fc9677c4e72d2d6b1476a6606adaf2dcd39da0 [file] [log] [blame]
Marek Vasut215a0652018-08-13 19:32:14 +0200[diff] [blame]1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright (C) 2018 Marek Vasut <marex@denx.de>
4 *
5 * Altera SoCFPGA EMAC extras
6 */
7
8#include <common.h>
9#include <asm/io.h>
10#include <dm.h>
11#include <clk.h>
12#include <phy.h>
13#include <regmap.h>
14#include <reset.h>
15#include <syscon.h>
16#include "designware.h"
17
18#include <asm/arch/system_manager.h>
19
20enum dwmac_type {
21 DWMAC_SOCFPGA_GEN5 = 0,
22 DWMAC_SOCFPGA_ARRIA10,
23 DWMAC_SOCFPGA_STRATIX10,
24};
25
26struct dwmac_socfpga_platdata {
27 struct dw_eth_pdata dw_eth_pdata;
28 enum dwmac_type type;
29 void *phy_intf;
30};
31
32static int dwmac_socfpga_ofdata_to_platdata(struct udevice *dev)
33{
34 struct dwmac_socfpga_platdata *pdata = dev_get_platdata(dev);
35 struct regmap *regmap;
36 struct ofnode_phandle_args args;
37 void *range;
38 int ret;
39
40 ret = dev_read_phandle_with_args(dev, "altr,sysmgr-syscon", NULL,
41 2, 0, &args);
42 if (ret) {
43 dev_err(dev, "Failed to get syscon: %d\n", ret);
44 return ret;
45 }
46
47 if (args.args_count != 2) {
48 dev_err(dev, "Invalid number of syscon args\n");
49 return -EINVAL;
50 }
51
52 regmap = syscon_node_to_regmap(args.node);
53 if (IS_ERR(regmap)) {
54 ret = PTR_ERR(regmap);
55 dev_err(dev, "Failed to get regmap: %d\n", ret);
56 return ret;
57 }
58
59 range = regmap_get_range(regmap, 0);
60 if (!range) {
61 dev_err(dev, "Failed to get regmap range\n");
62 return -ENOMEM;
63 }
64
65 pdata->phy_intf = range + args.args[0];
66
67 /*
68 * Sadly, the Altera DT bindings don't have SoC-specific compatibles,
69 * so we have to guesstimate which SoC we are running on from the
70 * DWMAC version. Luckily, Altera at least updated the DWMAC with
71 * each SoC.
72 */
73 if (ofnode_device_is_compatible(dev->node, "snps,dwmac-3.70a"))
74 pdata->type = DWMAC_SOCFPGA_GEN5;
75
76 if (ofnode_device_is_compatible(dev->node, "snps,dwmac-3.72a"))
77 pdata->type = DWMAC_SOCFPGA_ARRIA10;
78
79 if (ofnode_device_is_compatible(dev->node, "snps,dwmac-3.74a"))
80 pdata->type = DWMAC_SOCFPGA_STRATIX10;
81
82 return designware_eth_ofdata_to_platdata(dev);
83}
84
85static int dwmac_socfpga_probe(struct udevice *dev)
86{
87 struct dwmac_socfpga_platdata *pdata = dev_get_platdata(dev);
88 struct eth_pdata *edata = &pdata->dw_eth_pdata.eth_pdata;
89 struct reset_ctl_bulk reset_bulk;
90 int ret;
91 u8 modereg;
92
93 if (pdata->type == DWMAC_SOCFPGA_ARRIA10) {
94 switch (edata->phy_interface) {
95 case PHY_INTERFACE_MODE_MII:
96 case PHY_INTERFACE_MODE_GMII:
97 modereg = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_GMII_MII;
98 break;
99 case PHY_INTERFACE_MODE_RMII:
100 modereg = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RMII;
101 break;
102 case PHY_INTERFACE_MODE_RGMII:
103 modereg = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RGMII;
104 break;
105 default:
106 dev_err(dev, "Unsupported PHY mode\n");
107 return -EINVAL;
108 }
109
110 ret = reset_get_bulk(dev, &reset_bulk);
111 if (ret) {
112 dev_err(dev, "Failed to get reset: %d\n", ret);
113 return ret;
114 }
115
116 reset_assert_bulk(&reset_bulk);
117
118 clrsetbits_le32(pdata->phy_intf,
119 SYSMGR_EMACGRP_CTRL_PHYSEL_MASK,
120 modereg);
121
122 reset_release_bulk(&reset_bulk);
123 }
124
125 return designware_eth_probe(dev);
126}
127
128static const struct udevice_id dwmac_socfpga_ids[] = {
129 { .compatible = "altr,socfpga-stmmac" },
130 { }
131};
132
133U_BOOT_DRIVER(dwmac_socfpga) = {
134 .name = "dwmac_socfpga",
135 .id = UCLASS_ETH,
136 .of_match = dwmac_socfpga_ids,
137 .ofdata_to_platdata = dwmac_socfpga_ofdata_to_platdata,
138 .probe = dwmac_socfpga_probe,
139 .ops = &designware_eth_ops,
140 .priv_auto_alloc_size = sizeof(struct dw_eth_dev),
141 .platdata_auto_alloc_size = sizeof(struct dwmac_socfpga_platdata),
142 .flags = DM_FLAG_ALLOC_PRIV_DMA,
143};