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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/drivers/usb/dwc3/dwc3-exynos.c
..
..
@@ -1,6 +1,6 @@
1
1
 // SPDX-License-Identifier: GPL-2.0
2
2
 /**
3
- * dwc3-exynos.c - Samsung EXYNOS DWC3 Specific Glue layer
3
+ * dwc3-exynos.c - Samsung Exynos DWC3 Specific Glue layer
4
4
  *
5
5
  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
6
6
  *		http://www.samsung.com
..
..
@@ -13,134 +13,70 @@
13
13
 #include <linux/slab.h>
14
14
 #include <linux/platform_device.h>
15
15
 #include <linux/clk.h>
16
-#include <linux/usb/otg.h>
17
-#include <linux/usb/usb_phy_generic.h>
18
16
 #include <linux/of.h>
19
17
 #include <linux/of_platform.h>
20
18
 #include <linux/regulator/consumer.h>
21
19
 
20
+#define DWC3_EXYNOS_MAX_CLOCKS	4
21
+
22
+struct dwc3_exynos_driverdata {
23
+	const char		*clk_names[DWC3_EXYNOS_MAX_CLOCKS];
24
+	int			num_clks;
25
+	int			suspend_clk_idx;
26
+};
27
+
22
28
 struct dwc3_exynos {
23
-	struct platform_device	*usb2_phy;
24
-	struct platform_device	*usb3_phy;
25
29
 	struct device		*dev;
26
30
 
27
-	struct clk		*clk;
28
-	struct clk		*susp_clk;
29
-	struct clk		*axius_clk;
31
+	const char		**clk_names;
32
+	struct clk		*clks[DWC3_EXYNOS_MAX_CLOCKS];
33
+	int			num_clks;
34
+	int			suspend_clk_idx;
30
35
 
31
36
 	struct regulator	*vdd33;
32
37
 	struct regulator	*vdd10;
33
38
 };
34
-
35
-static int dwc3_exynos_register_phys(struct dwc3_exynos *exynos)
36
-{
37
-	struct usb_phy_generic_platform_data pdata;
38
-	struct platform_device	*pdev;
39
-	int			ret;
40
-
41
-	memset(&pdata, 0x00, sizeof(pdata));
42
-
43
-	pdev = platform_device_alloc("usb_phy_generic", PLATFORM_DEVID_AUTO);
44
-	if (!pdev)
45
-		return -ENOMEM;
46
-
47
-	exynos->usb2_phy = pdev;
48
-	pdata.type = USB_PHY_TYPE_USB2;
49
-	pdata.gpio_reset = -1;
50
-
51
-	ret = platform_device_add_data(exynos->usb2_phy, &pdata, sizeof(pdata));
52
-	if (ret)
53
-		goto err1;
54
-
55
-	pdev = platform_device_alloc("usb_phy_generic", PLATFORM_DEVID_AUTO);
56
-	if (!pdev) {
57
-		ret = -ENOMEM;
58
-		goto err1;
59
-	}
60
-
61
-	exynos->usb3_phy = pdev;
62
-	pdata.type = USB_PHY_TYPE_USB3;
63
-
64
-	ret = platform_device_add_data(exynos->usb3_phy, &pdata, sizeof(pdata));
65
-	if (ret)
66
-		goto err2;
67
-
68
-	ret = platform_device_add(exynos->usb2_phy);
69
-	if (ret)
70
-		goto err2;
71
-
72
-	ret = platform_device_add(exynos->usb3_phy);
73
-	if (ret)
74
-		goto err3;
75
-
76
-	return 0;
77
-
78
-err3:
79
-	platform_device_del(exynos->usb2_phy);
80
-
81
-err2:
82
-	platform_device_put(exynos->usb3_phy);
83
-
84
-err1:
85
-	platform_device_put(exynos->usb2_phy);
86
-
87
-	return ret;
88
-}
89
-
90
-static int dwc3_exynos_remove_child(struct device *dev, void *unused)
91
-{
92
-	struct platform_device *pdev = to_platform_device(dev);
93
-
94
-	platform_device_unregister(pdev);
95
-
96
-	return 0;
97
-}
98
39
 
99
40
 static int dwc3_exynos_probe(struct platform_device *pdev)
100
41
 {
101
42
 	struct dwc3_exynos	*exynos;
102
43
 	struct device		*dev = &pdev->dev;
103
44
 	struct device_node	*node = dev->of_node;
104
-
105
-	int			ret;
45
+	const struct dwc3_exynos_driverdata *driver_data;
46
+	int			i, ret;
106
47
 
107
48
 	exynos = devm_kzalloc(dev, sizeof(*exynos), GFP_KERNEL);
108
49
 	if (!exynos)
109
50
 		return -ENOMEM;
110
51
 
52
+	driver_data = of_device_get_match_data(dev);
53
+	exynos->dev = dev;
54
+	exynos->num_clks = driver_data->num_clks;
55
+	exynos->clk_names = (const char **)driver_data->clk_names;
56
+	exynos->suspend_clk_idx = driver_data->suspend_clk_idx;
57
+
111
58
 	platform_set_drvdata(pdev, exynos);
112
59
 
113
-	exynos->dev	= dev;
114
-
115
-	exynos->clk = devm_clk_get(dev, "usbdrd30");
116
-	if (IS_ERR(exynos->clk)) {
117
-		dev_err(dev, "couldn't get clock\n");
118
-		return -EINVAL;
119
-	}
120
-	ret = clk_prepare_enable(exynos->clk);
121
-	if (ret)
122
-		return ret;
123
-
124
-	exynos->susp_clk = devm_clk_get(dev, "usbdrd30_susp_clk");
125
-	if (IS_ERR(exynos->susp_clk))
126
-		exynos->susp_clk = NULL;
127
-	ret = clk_prepare_enable(exynos->susp_clk);
128
-	if (ret)
129
-		goto susp_clk_err;
130
-
131
-	if (of_device_is_compatible(node, "samsung,exynos7-dwusb3")) {
132
-		exynos->axius_clk = devm_clk_get(dev, "usbdrd30_axius_clk");
133
-		if (IS_ERR(exynos->axius_clk)) {
134
-			dev_err(dev, "no AXI UpScaler clk specified\n");
135
-			ret = -ENODEV;
136
-			goto axius_clk_err;
60
+	for (i = 0; i < exynos->num_clks; i++) {
61
+		exynos->clks[i] = devm_clk_get(dev, exynos->clk_names[i]);
62
+		if (IS_ERR(exynos->clks[i])) {
63
+			dev_err(dev, "failed to get clock: %s\n",
64
+				exynos->clk_names[i]);
65
+			return PTR_ERR(exynos->clks[i]);
137
66
 		}
138
-		ret = clk_prepare_enable(exynos->axius_clk);
139
-		if (ret)
140
-			goto axius_clk_err;
141
-	} else {
142
-		exynos->axius_clk = NULL;
143
67
 	}
68
+
69
+	for (i = 0; i < exynos->num_clks; i++) {
70
+		ret = clk_prepare_enable(exynos->clks[i]);
71
+		if (ret) {
72
+			while (i-- > 0)
73
+				clk_disable_unprepare(exynos->clks[i]);
74
+			return ret;
75
+		}
76
+	}
77
+
78
+	if (exynos->suspend_clk_idx >= 0)
79
+		clk_prepare_enable(exynos->clks[exynos->suspend_clk_idx]);
144
80
 
145
81
 	exynos->vdd33 = devm_regulator_get(dev, "vdd33");
146
82
 	if (IS_ERR(exynos->vdd33)) {
..
..
@@ -164,12 +100,6 @@
164
100
 		goto vdd10_err;
165
101
 	}
166
102
 
167
-	ret = dwc3_exynos_register_phys(exynos);
168
-	if (ret) {
169
-		dev_err(dev, "couldn't register PHYs\n");
170
-		goto phys_err;
171
-	}
172
-
173
103
 	if (node) {
174
104
 		ret = of_platform_populate(node, NULL, NULL, dev);
175
105
 		if (ret) {
..
..
@@ -185,32 +115,31 @@
185
115
 	return 0;
186
116
 
187
117
 populate_err:
188
-	platform_device_unregister(exynos->usb2_phy);
189
-	platform_device_unregister(exynos->usb3_phy);
190
-phys_err:
191
118
 	regulator_disable(exynos->vdd10);
192
119
 vdd10_err:
193
120
 	regulator_disable(exynos->vdd33);
194
121
 vdd33_err:
195
-	clk_disable_unprepare(exynos->axius_clk);
196
-axius_clk_err:
197
-	clk_disable_unprepare(exynos->susp_clk);
198
-susp_clk_err:
199
-	clk_disable_unprepare(exynos->clk);
122
+	for (i = exynos->num_clks - 1; i >= 0; i--)
123
+		clk_disable_unprepare(exynos->clks[i]);
124
+
125
+	if (exynos->suspend_clk_idx >= 0)
126
+		clk_disable_unprepare(exynos->clks[exynos->suspend_clk_idx]);
127
+
200
128
 	return ret;
201
129
 }
202
130
 
203
131
 static int dwc3_exynos_remove(struct platform_device *pdev)
204
132
 {
205
133
 	struct dwc3_exynos	*exynos = platform_get_drvdata(pdev);
134
+	int i;
206
135
 
207
-	device_for_each_child(&pdev->dev, NULL, dwc3_exynos_remove_child);
208
-	platform_device_unregister(exynos->usb2_phy);
209
-	platform_device_unregister(exynos->usb3_phy);
136
+	of_platform_depopulate(&pdev->dev);
210
137
 
211
-	clk_disable_unprepare(exynos->axius_clk);
212
-	clk_disable_unprepare(exynos->susp_clk);
213
-	clk_disable_unprepare(exynos->clk);
138
+	for (i = exynos->num_clks - 1; i >= 0; i--)
139
+		clk_disable_unprepare(exynos->clks[i]);
140
+
141
+	if (exynos->suspend_clk_idx >= 0)
142
+		clk_disable_unprepare(exynos->clks[exynos->suspend_clk_idx]);
214
143
 
215
144
 	regulator_disable(exynos->vdd33);
216
145
 	regulator_disable(exynos->vdd10);
..
..
@@ -218,10 +147,36 @@
218
147
 	return 0;
219
148
 }
220
149
 
150
+static const struct dwc3_exynos_driverdata exynos5250_drvdata = {
151
+	.clk_names = { "usbdrd30" },
152
+	.num_clks = 1,
153
+	.suspend_clk_idx = -1,
154
+};
155
+
156
+static const struct dwc3_exynos_driverdata exynos5433_drvdata = {
157
+	.clk_names = { "aclk", "susp_clk", "pipe_pclk", "phyclk" },
158
+	.num_clks = 4,
159
+	.suspend_clk_idx = 1,
160
+};
161
+
162
+static const struct dwc3_exynos_driverdata exynos7_drvdata = {
163
+	.clk_names = { "usbdrd30", "usbdrd30_susp_clk", "usbdrd30_axius_clk" },
164
+	.num_clks = 3,
165
+	.suspend_clk_idx = 1,
166
+};
167
+
221
168
 static const struct of_device_id exynos_dwc3_match[] = {
222
-	{ .compatible = "samsung,exynos5250-dwusb3" },
223
-	{ .compatible = "samsung,exynos7-dwusb3" },
224
-	{},
169
+	{
170
+		.compatible = "samsung,exynos5250-dwusb3",
171
+		.data = &exynos5250_drvdata,
172
+	}, {
173
+		.compatible = "samsung,exynos5433-dwusb3",
174
+		.data = &exynos5433_drvdata,
175
+	}, {
176
+		.compatible = "samsung,exynos7-dwusb3",
177
+		.data = &exynos7_drvdata,
178
+	}, {
179
+	}
225
180
 };
226
181
 MODULE_DEVICE_TABLE(of, exynos_dwc3_match);
227
182
 
..
..
@@ -229,9 +184,10 @@
229
184
 static int dwc3_exynos_suspend(struct device *dev)
230
185
 {
231
186
 	struct dwc3_exynos *exynos = dev_get_drvdata(dev);
187
+	int i;
232
188
 
233
-	clk_disable(exynos->axius_clk);
234
-	clk_disable(exynos->clk);
189
+	for (i = exynos->num_clks - 1; i >= 0; i--)
190
+		clk_disable_unprepare(exynos->clks[i]);
235
191
 
236
192
 	regulator_disable(exynos->vdd33);
237
193
 	regulator_disable(exynos->vdd10);
..
..
@@ -242,7 +198,7 @@
242
198
 static int dwc3_exynos_resume(struct device *dev)
243
199
 {
244
200
 	struct dwc3_exynos *exynos = dev_get_drvdata(dev);
245
-	int ret;
201
+	int i, ret;
246
202
 
247
203
 	ret = regulator_enable(exynos->vdd33);
248
204
 	if (ret) {
..
..
@@ -255,13 +211,14 @@
255
211
 		return ret;
256
212
 	}
257
213
 
258
-	clk_enable(exynos->clk);
259
-	clk_enable(exynos->axius_clk);
260
-
261
-	/* runtime set active to reflect active state. */
262
-	pm_runtime_disable(dev);
263
-	pm_runtime_set_active(dev);
264
-	pm_runtime_enable(dev);
214
+	for (i = 0; i < exynos->num_clks; i++) {
215
+		ret = clk_prepare_enable(exynos->clks[i]);
216
+		if (ret) {
217
+			while (i-- > 0)
218
+				clk_disable_unprepare(exynos->clks[i]);
219
+			return ret;
220
+		}
221
+	}
265
222
 
266
223
 	return 0;
267
224
 }
..
..
@@ -289,4 +246,4 @@
289
246
 
290
247
 MODULE_AUTHOR("Anton Tikhomirov <av.tikhomirov@samsung.com>");
291
248
 MODULE_LICENSE("GPL v2");
292
-MODULE_DESCRIPTION("DesignWare USB3 EXYNOS Glue Layer");
249
+MODULE_DESCRIPTION("DesignWare USB3 Exynos Glue Layer");