Commit | Line | Data |
---|---|---|
5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0 |
26ef796f | 2 | /* |
16adc674 FB |
3 | * dwc3-of-simple.c - OF glue layer for simple integrations |
4 | * | |
10623b87 | 5 | * Copyright (c) 2015 Texas Instruments Incorporated - https://www.ti.com |
16adc674 FB |
6 | * |
7 | * Author: Felipe Balbi <balbi@ti.com> | |
8 | * | |
16adc674 FB |
9 | * This is a combination of the old dwc3-qcom.c by Ivan T. Ivanov |
10 | * <iivanov@mm-sol.com> and the original patch adding support for Xilinx' SoC | |
11 | * by Subbaraya Sundeep Bhatta <subbaraya.sundeep.bhatta@xilinx.com> | |
12 | */ | |
13 | ||
14 | #include <linux/module.h> | |
15 | #include <linux/kernel.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/platform_device.h> | |
18 | #include <linux/dma-mapping.h> | |
19 | #include <linux/clk.h> | |
16adc674 FB |
20 | #include <linux/of.h> |
21 | #include <linux/of_platform.h> | |
22 | #include <linux/pm_runtime.h> | |
06c47e62 | 23 | #include <linux/reset.h> |
16adc674 FB |
24 | |
25 | struct dwc3_of_simple { | |
26 | struct device *dev; | |
c0c61471 | 27 | struct clk_bulk_data *clks; |
16adc674 | 28 | int num_clocks; |
06c47e62 | 29 | struct reset_control *resets; |
76251db8 | 30 | bool need_reset; |
16adc674 FB |
31 | }; |
32 | ||
26c9cac4 FB |
33 | static int dwc3_of_simple_probe(struct platform_device *pdev) |
34 | { | |
35 | struct dwc3_of_simple *simple; | |
36 | struct device *dev = &pdev->dev; | |
37 | struct device_node *np = dev->of_node; | |
38 | ||
39 | int ret; | |
26c9cac4 FB |
40 | |
41 | simple = devm_kzalloc(dev, sizeof(*simple), GFP_KERNEL); | |
42 | if (!simple) | |
43 | return -ENOMEM; | |
44 | ||
45 | platform_set_drvdata(pdev, simple); | |
46 | simple->dev = dev; | |
47 | ||
76251db8 EBS |
48 | /* |
49 | * Some controllers need to toggle the usb3-otg reset before trying to | |
50 | * initialize the PHY, otherwise the PHY times out. | |
51 | */ | |
52 | if (of_device_is_compatible(np, "rockchip,rk3399-dwc3")) | |
53 | simple->need_reset = true; | |
54 | ||
f4cc91dd | 55 | simple->resets = of_reset_control_array_get(np, false, true, |
f31d5c24 | 56 | true); |
06c47e62 VG |
57 | if (IS_ERR(simple->resets)) { |
58 | ret = PTR_ERR(simple->resets); | |
59 | dev_err(dev, "failed to get device resets, err=%d\n", ret); | |
60 | return ret; | |
61 | } | |
62 | ||
f4cc91dd MB |
63 | ret = reset_control_deassert(simple->resets); |
64 | if (ret) | |
65 | goto err_resetc_put; | |
06c47e62 | 66 | |
c0c61471 RM |
67 | ret = clk_bulk_get_all(simple->dev, &simple->clks); |
68 | if (ret < 0) | |
69 | goto err_resetc_assert; | |
70 | ||
71 | simple->num_clocks = ret; | |
72 | ret = clk_bulk_prepare_enable(simple->num_clocks, simple->clks); | |
26c9cac4 | 73 | if (ret) |
06c47e62 | 74 | goto err_resetc_assert; |
26c9cac4 | 75 | |
16adc674 | 76 | ret = of_platform_populate(np, NULL, NULL, dev); |
c0c61471 RM |
77 | if (ret) |
78 | goto err_clk_put; | |
16adc674 FB |
79 | |
80 | pm_runtime_set_active(dev); | |
81 | pm_runtime_enable(dev); | |
82 | pm_runtime_get_sync(dev); | |
83 | ||
84 | return 0; | |
06c47e62 | 85 | |
c0c61471 RM |
86 | err_clk_put: |
87 | clk_bulk_disable_unprepare(simple->num_clocks, simple->clks); | |
88 | clk_bulk_put_all(simple->num_clocks, simple->clks); | |
89 | ||
06c47e62 | 90 | err_resetc_assert: |
f4cc91dd | 91 | reset_control_assert(simple->resets); |
06c47e62 VG |
92 | |
93 | err_resetc_put: | |
94 | reset_control_put(simple->resets); | |
95 | return ret; | |
16adc674 FB |
96 | } |
97 | ||
726b4fba | 98 | static void __dwc3_of_simple_teardown(struct dwc3_of_simple *simple) |
16adc674 | 99 | { |
726b4fba | 100 | of_platform_depopulate(simple->dev); |
d6d9c2a3 | 101 | |
c0c61471 RM |
102 | clk_bulk_disable_unprepare(simple->num_clocks, simple->clks); |
103 | clk_bulk_put_all(simple->num_clocks, simple->clks); | |
bff52352 | 104 | simple->num_clocks = 0; |
16adc674 | 105 | |
f4cc91dd | 106 | reset_control_assert(simple->resets); |
ff0a632f | 107 | |
06c47e62 VG |
108 | reset_control_put(simple->resets); |
109 | ||
726b4fba FB |
110 | pm_runtime_disable(simple->dev); |
111 | pm_runtime_put_noidle(simple->dev); | |
112 | pm_runtime_set_suspended(simple->dev); | |
113 | } | |
114 | ||
115 | static int dwc3_of_simple_remove(struct platform_device *pdev) | |
116 | { | |
117 | struct dwc3_of_simple *simple = platform_get_drvdata(pdev); | |
118 | ||
119 | __dwc3_of_simple_teardown(simple); | |
16adc674 FB |
120 | |
121 | return 0; | |
122 | } | |
123 | ||
726b4fba FB |
124 | static void dwc3_of_simple_shutdown(struct platform_device *pdev) |
125 | { | |
126 | struct dwc3_of_simple *simple = platform_get_drvdata(pdev); | |
127 | ||
128 | __dwc3_of_simple_teardown(simple); | |
129 | } | |
130 | ||
66174b69 | 131 | static int __maybe_unused dwc3_of_simple_runtime_suspend(struct device *dev) |
16adc674 FB |
132 | { |
133 | struct dwc3_of_simple *simple = dev_get_drvdata(dev); | |
16adc674 | 134 | |
c0c61471 | 135 | clk_bulk_disable(simple->num_clocks, simple->clks); |
16adc674 FB |
136 | |
137 | return 0; | |
138 | } | |
139 | ||
66174b69 | 140 | static int __maybe_unused dwc3_of_simple_runtime_resume(struct device *dev) |
16adc674 FB |
141 | { |
142 | struct dwc3_of_simple *simple = dev_get_drvdata(dev); | |
16adc674 | 143 | |
c0c61471 | 144 | return clk_bulk_enable(simple->num_clocks, simple->clks); |
16adc674 | 145 | } |
76251db8 | 146 | |
66174b69 | 147 | static int __maybe_unused dwc3_of_simple_suspend(struct device *dev) |
76251db8 EBS |
148 | { |
149 | struct dwc3_of_simple *simple = dev_get_drvdata(dev); | |
150 | ||
151 | if (simple->need_reset) | |
152 | reset_control_assert(simple->resets); | |
153 | ||
154 | return 0; | |
155 | } | |
156 | ||
66174b69 | 157 | static int __maybe_unused dwc3_of_simple_resume(struct device *dev) |
76251db8 EBS |
158 | { |
159 | struct dwc3_of_simple *simple = dev_get_drvdata(dev); | |
160 | ||
161 | if (simple->need_reset) | |
162 | reset_control_deassert(simple->resets); | |
163 | ||
164 | return 0; | |
165 | } | |
16adc674 FB |
166 | |
167 | static const struct dev_pm_ops dwc3_of_simple_dev_pm_ops = { | |
76251db8 | 168 | SET_SYSTEM_SLEEP_PM_OPS(dwc3_of_simple_suspend, dwc3_of_simple_resume) |
16adc674 FB |
169 | SET_RUNTIME_PM_OPS(dwc3_of_simple_runtime_suspend, |
170 | dwc3_of_simple_runtime_resume, NULL) | |
171 | }; | |
172 | ||
173 | static const struct of_device_id of_dwc3_simple_match[] = { | |
f652191b | 174 | { .compatible = "rockchip,rk3399-dwc3" }, |
16adc674 | 175 | { .compatible = "xlnx,zynqmp-dwc3" }, |
b281dc63 | 176 | { .compatible = "cavium,octeon-7130-usb-uctl" }, |
c3cdce45 | 177 | { .compatible = "sprd,sc9860-dwc3" }, |
e362098f | 178 | { .compatible = "allwinner,sun50i-h6-dwc3" }, |
16adc674 FB |
179 | { /* Sentinel */ } |
180 | }; | |
181 | MODULE_DEVICE_TABLE(of, of_dwc3_simple_match); | |
182 | ||
183 | static struct platform_driver dwc3_of_simple_driver = { | |
184 | .probe = dwc3_of_simple_probe, | |
185 | .remove = dwc3_of_simple_remove, | |
726b4fba | 186 | .shutdown = dwc3_of_simple_shutdown, |
16adc674 FB |
187 | .driver = { |
188 | .name = "dwc3-of-simple", | |
189 | .of_match_table = of_dwc3_simple_match, | |
a0d8c4cf | 190 | .pm = &dwc3_of_simple_dev_pm_ops, |
16adc674 FB |
191 | }, |
192 | }; | |
193 | ||
194 | module_platform_driver(dwc3_of_simple_driver); | |
195 | MODULE_LICENSE("GPL v2"); | |
196 | MODULE_DESCRIPTION("DesignWare USB3 OF Simple Glue Layer"); | |
197 | MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); |