1
2
3
4
5
6
7
8
9
10#include <linux/delay.h>
11#include <linux/err.h>
12#include <linux/io.h>
13#include <linux/kernel.h>
14#include <linux/module.h>
15#include <linux/mutex.h>
16#include <linux/of_platform.h>
17#include <linux/of_device.h>
18#include <linux/phy/phy.h>
19#include <linux/platform_device.h>
20#include <linux/reset.h>
21
22struct ipq4019_usb_phy {
23 struct device *dev;
24 struct phy *phy;
25 void __iomem *base;
26 struct reset_control *por_rst;
27 struct reset_control *srif_rst;
28};
29
30static int ipq4019_ss_phy_power_off(struct phy *_phy)
31{
32 struct ipq4019_usb_phy *phy = phy_get_drvdata(_phy);
33
34 reset_control_assert(phy->por_rst);
35 msleep(10);
36
37 return 0;
38}
39
40static int ipq4019_ss_phy_power_on(struct phy *_phy)
41{
42 struct ipq4019_usb_phy *phy = phy_get_drvdata(_phy);
43
44 ipq4019_ss_phy_power_off(_phy);
45
46 reset_control_deassert(phy->por_rst);
47
48 return 0;
49}
50
51static const struct phy_ops ipq4019_usb_ss_phy_ops = {
52 .power_on = ipq4019_ss_phy_power_on,
53 .power_off = ipq4019_ss_phy_power_off,
54};
55
56static int ipq4019_hs_phy_power_off(struct phy *_phy)
57{
58 struct ipq4019_usb_phy *phy = phy_get_drvdata(_phy);
59
60 reset_control_assert(phy->por_rst);
61 msleep(10);
62
63 reset_control_assert(phy->srif_rst);
64 msleep(10);
65
66 return 0;
67}
68
69static int ipq4019_hs_phy_power_on(struct phy *_phy)
70{
71 struct ipq4019_usb_phy *phy = phy_get_drvdata(_phy);
72
73 ipq4019_hs_phy_power_off(_phy);
74
75 reset_control_deassert(phy->srif_rst);
76 msleep(10);
77
78 reset_control_deassert(phy->por_rst);
79
80 return 0;
81}
82
83static const struct phy_ops ipq4019_usb_hs_phy_ops = {
84 .power_on = ipq4019_hs_phy_power_on,
85 .power_off = ipq4019_hs_phy_power_off,
86};
87
88static const struct of_device_id ipq4019_usb_phy_of_match[] = {
89 { .compatible = "qcom,usb-hs-ipq4019-phy", .data = &ipq4019_usb_hs_phy_ops},
90 { .compatible = "qcom,usb-ss-ipq4019-phy", .data = &ipq4019_usb_ss_phy_ops},
91 { },
92};
93MODULE_DEVICE_TABLE(of, ipq4019_usb_phy_of_match);
94
95static int ipq4019_usb_phy_probe(struct platform_device *pdev)
96{
97 struct device *dev = &pdev->dev;
98 struct phy_provider *phy_provider;
99 struct ipq4019_usb_phy *phy;
100
101 phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
102 if (!phy)
103 return -ENOMEM;
104
105 phy->dev = &pdev->dev;
106 phy->base = devm_platform_ioremap_resource(pdev, 0);
107 if (IS_ERR(phy->base)) {
108 dev_err(dev, "failed to remap register memory\n");
109 return PTR_ERR(phy->base);
110 }
111
112 phy->por_rst = devm_reset_control_get(phy->dev, "por_rst");
113 if (IS_ERR(phy->por_rst)) {
114 if (PTR_ERR(phy->por_rst) != -EPROBE_DEFER)
115 dev_err(dev, "POR reset is missing\n");
116 return PTR_ERR(phy->por_rst);
117 }
118
119 phy->srif_rst = devm_reset_control_get_optional(phy->dev, "srif_rst");
120 if (IS_ERR(phy->srif_rst))
121 return PTR_ERR(phy->srif_rst);
122
123 phy->phy = devm_phy_create(dev, NULL, of_device_get_match_data(dev));
124 if (IS_ERR(phy->phy)) {
125 dev_err(dev, "failed to create PHY\n");
126 return PTR_ERR(phy->phy);
127 }
128 phy_set_drvdata(phy->phy, phy);
129
130 phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
131
132 return PTR_ERR_OR_ZERO(phy_provider);
133}
134
135static struct platform_driver ipq4019_usb_phy_driver = {
136 .probe = ipq4019_usb_phy_probe,
137 .driver = {
138 .of_match_table = ipq4019_usb_phy_of_match,
139 .name = "ipq4019-usb-phy",
140 }
141};
142module_platform_driver(ipq4019_usb_phy_driver);
143
144MODULE_DESCRIPTION("QCOM/IPQ4019 USB phy driver");
145MODULE_AUTHOR("John Crispin <john@phrozen.org>");
146MODULE_LICENSE("GPL v2");
147
