This source file includes following definitions.
- omap_usb2_set_comparator
- omap_usb_set_vbus
- omap_usb_start_srp
- omap_usb_set_host
- omap_usb_set_peripheral
- omap_usb_phy_power
- omap_usb_power_off
- omap_usb_power_on
- omap_usb2_disable_clocks
- omap_usb2_enable_clocks
- omap_usb_init
- omap_usb_exit
- omap_usb2_probe
- omap_usb2_remove
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9 #include <linux/module.h>
10 #include <linux/platform_device.h>
11 #include <linux/slab.h>
12 #include <linux/of.h>
13 #include <linux/io.h>
14 #include <linux/phy/omap_usb.h>
15 #include <linux/usb/phy_companion.h>
16 #include <linux/clk.h>
17 #include <linux/err.h>
18 #include <linux/pm_runtime.h>
19 #include <linux/delay.h>
20 #include <linux/phy/omap_control_phy.h>
21 #include <linux/phy/phy.h>
22 #include <linux/mfd/syscon.h>
23 #include <linux/regmap.h>
24 #include <linux/of_platform.h>
25
26 #define USB2PHY_DISCON_BYP_LATCH (1 << 31)
27 #define USB2PHY_ANA_CONFIG1 0x4c
28
29 #define AM654_USB2_OTG_PD BIT(8)
30 #define AM654_USB2_VBUS_DET_EN BIT(5)
31 #define AM654_USB2_VBUSVALID_DET_EN BIT(4)
32
33
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37
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40
41
42
43 int omap_usb2_set_comparator(struct phy_companion *comparator)
44 {
45 struct omap_usb *phy;
46 struct usb_phy *x = usb_get_phy(USB_PHY_TYPE_USB2);
47
48 if (IS_ERR(x))
49 return -ENODEV;
50
51 phy = phy_to_omapusb(x);
52 phy->comparator = comparator;
53 return 0;
54 }
55 EXPORT_SYMBOL_GPL(omap_usb2_set_comparator);
56
57 static int omap_usb_set_vbus(struct usb_otg *otg, bool enabled)
58 {
59 struct omap_usb *phy = phy_to_omapusb(otg->usb_phy);
60
61 if (!phy->comparator)
62 return -ENODEV;
63
64 return phy->comparator->set_vbus(phy->comparator, enabled);
65 }
66
67 static int omap_usb_start_srp(struct usb_otg *otg)
68 {
69 struct omap_usb *phy = phy_to_omapusb(otg->usb_phy);
70
71 if (!phy->comparator)
72 return -ENODEV;
73
74 return phy->comparator->start_srp(phy->comparator);
75 }
76
77 static int omap_usb_set_host(struct usb_otg *otg, struct usb_bus *host)
78 {
79 otg->host = host;
80 if (!host)
81 otg->state = OTG_STATE_UNDEFINED;
82
83 return 0;
84 }
85
86 static int omap_usb_set_peripheral(struct usb_otg *otg,
87 struct usb_gadget *gadget)
88 {
89 otg->gadget = gadget;
90 if (!gadget)
91 otg->state = OTG_STATE_UNDEFINED;
92
93 return 0;
94 }
95
96 static int omap_usb_phy_power(struct omap_usb *phy, int on)
97 {
98 u32 val;
99 int ret;
100
101 if (!phy->syscon_phy_power) {
102 omap_control_phy_power(phy->control_dev, on);
103 return 0;
104 }
105
106 if (on)
107 val = phy->power_on;
108 else
109 val = phy->power_off;
110
111 ret = regmap_update_bits(phy->syscon_phy_power, phy->power_reg,
112 phy->mask, val);
113 return ret;
114 }
115
116 static int omap_usb_power_off(struct phy *x)
117 {
118 struct omap_usb *phy = phy_get_drvdata(x);
119
120 return omap_usb_phy_power(phy, false);
121 }
122
123 static int omap_usb_power_on(struct phy *x)
124 {
125 struct omap_usb *phy = phy_get_drvdata(x);
126
127 return omap_usb_phy_power(phy, true);
128 }
129
130 static int omap_usb2_disable_clocks(struct omap_usb *phy)
131 {
132 clk_disable_unprepare(phy->wkupclk);
133 if (!IS_ERR(phy->optclk))
134 clk_disable_unprepare(phy->optclk);
135
136 return 0;
137 }
138
139 static int omap_usb2_enable_clocks(struct omap_usb *phy)
140 {
141 int ret;
142
143 ret = clk_prepare_enable(phy->wkupclk);
144 if (ret < 0) {
145 dev_err(phy->dev, "Failed to enable wkupclk %d\n", ret);
146 goto err0;
147 }
148
149 if (!IS_ERR(phy->optclk)) {
150 ret = clk_prepare_enable(phy->optclk);
151 if (ret < 0) {
152 dev_err(phy->dev, "Failed to enable optclk %d\n", ret);
153 goto err1;
154 }
155 }
156
157 return 0;
158
159 err1:
160 clk_disable(phy->wkupclk);
161
162 err0:
163 return ret;
164 }
165
166 static int omap_usb_init(struct phy *x)
167 {
168 struct omap_usb *phy = phy_get_drvdata(x);
169 u32 val;
170
171 omap_usb2_enable_clocks(phy);
172
173 if (phy->flags & OMAP_USB2_CALIBRATE_FALSE_DISCONNECT) {
174
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176
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180
181
182 val = omap_usb_readl(phy->phy_base, USB2PHY_ANA_CONFIG1);
183 val |= USB2PHY_DISCON_BYP_LATCH;
184 omap_usb_writel(phy->phy_base, USB2PHY_ANA_CONFIG1, val);
185 }
186
187 return 0;
188 }
189
190 static int omap_usb_exit(struct phy *x)
191 {
192 struct omap_usb *phy = phy_get_drvdata(x);
193
194 return omap_usb2_disable_clocks(phy);
195 }
196
197 static const struct phy_ops ops = {
198 .init = omap_usb_init,
199 .exit = omap_usb_exit,
200 .power_on = omap_usb_power_on,
201 .power_off = omap_usb_power_off,
202 .owner = THIS_MODULE,
203 };
204
205 static const struct usb_phy_data omap_usb2_data = {
206 .label = "omap_usb2",
207 .flags = OMAP_USB2_HAS_START_SRP | OMAP_USB2_HAS_SET_VBUS,
208 .mask = OMAP_DEV_PHY_PD,
209 .power_off = OMAP_DEV_PHY_PD,
210 };
211
212 static const struct usb_phy_data omap5_usb2_data = {
213 .label = "omap5_usb2",
214 .flags = 0,
215 .mask = OMAP_DEV_PHY_PD,
216 .power_off = OMAP_DEV_PHY_PD,
217 };
218
219 static const struct usb_phy_data dra7x_usb2_data = {
220 .label = "dra7x_usb2",
221 .flags = OMAP_USB2_CALIBRATE_FALSE_DISCONNECT,
222 .mask = OMAP_DEV_PHY_PD,
223 .power_off = OMAP_DEV_PHY_PD,
224 };
225
226 static const struct usb_phy_data dra7x_usb2_phy2_data = {
227 .label = "dra7x_usb2_phy2",
228 .flags = OMAP_USB2_CALIBRATE_FALSE_DISCONNECT,
229 .mask = OMAP_USB2_PHY_PD,
230 .power_off = OMAP_USB2_PHY_PD,
231 };
232
233 static const struct usb_phy_data am437x_usb2_data = {
234 .label = "am437x_usb2",
235 .flags = 0,
236 .mask = AM437X_USB2_PHY_PD | AM437X_USB2_OTG_PD |
237 AM437X_USB2_OTGVDET_EN | AM437X_USB2_OTGSESSEND_EN,
238 .power_on = AM437X_USB2_OTGVDET_EN | AM437X_USB2_OTGSESSEND_EN,
239 .power_off = AM437X_USB2_PHY_PD | AM437X_USB2_OTG_PD,
240 };
241
242 static const struct usb_phy_data am654_usb2_data = {
243 .label = "am654_usb2",
244 .flags = OMAP_USB2_CALIBRATE_FALSE_DISCONNECT,
245 .mask = AM654_USB2_OTG_PD | AM654_USB2_VBUS_DET_EN |
246 AM654_USB2_VBUSVALID_DET_EN,
247 .power_on = AM654_USB2_VBUS_DET_EN | AM654_USB2_VBUSVALID_DET_EN,
248 .power_off = AM654_USB2_OTG_PD,
249 };
250
251 static const struct of_device_id omap_usb2_id_table[] = {
252 {
253 .compatible = "ti,omap-usb2",
254 .data = &omap_usb2_data,
255 },
256 {
257 .compatible = "ti,omap5-usb2",
258 .data = &omap5_usb2_data,
259 },
260 {
261 .compatible = "ti,dra7x-usb2",
262 .data = &dra7x_usb2_data,
263 },
264 {
265 .compatible = "ti,dra7x-usb2-phy2",
266 .data = &dra7x_usb2_phy2_data,
267 },
268 {
269 .compatible = "ti,am437x-usb2",
270 .data = &am437x_usb2_data,
271 },
272 {
273 .compatible = "ti,am654-usb2",
274 .data = &am654_usb2_data,
275 },
276 {},
277 };
278 MODULE_DEVICE_TABLE(of, omap_usb2_id_table);
279
280 static int omap_usb2_probe(struct platform_device *pdev)
281 {
282 struct omap_usb *phy;
283 struct phy *generic_phy;
284 struct resource *res;
285 struct phy_provider *phy_provider;
286 struct usb_otg *otg;
287 struct device_node *node = pdev->dev.of_node;
288 struct device_node *control_node;
289 struct platform_device *control_pdev;
290 const struct of_device_id *of_id;
291 struct usb_phy_data *phy_data;
292
293 of_id = of_match_device(omap_usb2_id_table, &pdev->dev);
294
295 if (!of_id)
296 return -EINVAL;
297
298 phy_data = (struct usb_phy_data *)of_id->data;
299
300 phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL);
301 if (!phy)
302 return -ENOMEM;
303
304 otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL);
305 if (!otg)
306 return -ENOMEM;
307
308 phy->dev = &pdev->dev;
309
310 phy->phy.dev = phy->dev;
311 phy->phy.label = phy_data->label;
312 phy->phy.otg = otg;
313 phy->phy.type = USB_PHY_TYPE_USB2;
314 phy->mask = phy_data->mask;
315 phy->power_on = phy_data->power_on;
316 phy->power_off = phy_data->power_off;
317
318 if (phy_data->flags & OMAP_USB2_CALIBRATE_FALSE_DISCONNECT) {
319 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
320 phy->phy_base = devm_ioremap_resource(&pdev->dev, res);
321 if (IS_ERR(phy->phy_base))
322 return PTR_ERR(phy->phy_base);
323 phy->flags |= OMAP_USB2_CALIBRATE_FALSE_DISCONNECT;
324 }
325
326 phy->syscon_phy_power = syscon_regmap_lookup_by_phandle(node,
327 "syscon-phy-power");
328 if (IS_ERR(phy->syscon_phy_power)) {
329 dev_dbg(&pdev->dev,
330 "can't get syscon-phy-power, using control device\n");
331 phy->syscon_phy_power = NULL;
332
333 control_node = of_parse_phandle(node, "ctrl-module", 0);
334 if (!control_node) {
335 dev_err(&pdev->dev,
336 "Failed to get control device phandle\n");
337 return -EINVAL;
338 }
339
340 control_pdev = of_find_device_by_node(control_node);
341 if (!control_pdev) {
342 dev_err(&pdev->dev, "Failed to get control device\n");
343 return -EINVAL;
344 }
345 phy->control_dev = &control_pdev->dev;
346 } else {
347 if (of_property_read_u32_index(node,
348 "syscon-phy-power", 1,
349 &phy->power_reg)) {
350 dev_err(&pdev->dev,
351 "couldn't get power reg. offset\n");
352 return -EINVAL;
353 }
354 }
355
356
357 phy->wkupclk = devm_clk_get(phy->dev, "wkupclk");
358 if (IS_ERR(phy->wkupclk)) {
359 if (PTR_ERR(phy->wkupclk) == -EPROBE_DEFER)
360 return -EPROBE_DEFER;
361
362 dev_warn(&pdev->dev, "unable to get wkupclk %ld, trying old name\n",
363 PTR_ERR(phy->wkupclk));
364 phy->wkupclk = devm_clk_get(phy->dev, "usb_phy_cm_clk32k");
365
366 if (IS_ERR(phy->wkupclk)) {
367 if (PTR_ERR(phy->wkupclk) != -EPROBE_DEFER)
368 dev_err(&pdev->dev, "unable to get usb_phy_cm_clk32k\n");
369 return PTR_ERR(phy->wkupclk);
370 } else {
371 dev_warn(&pdev->dev,
372 "found usb_phy_cm_clk32k, please fix DTS\n");
373 }
374 }
375
376 phy->optclk = devm_clk_get(phy->dev, "refclk");
377 if (IS_ERR(phy->optclk)) {
378 if (PTR_ERR(phy->optclk) == -EPROBE_DEFER)
379 return -EPROBE_DEFER;
380
381 dev_dbg(&pdev->dev, "unable to get refclk, trying old name\n");
382 phy->optclk = devm_clk_get(phy->dev, "usb_otg_ss_refclk960m");
383
384 if (IS_ERR(phy->optclk)) {
385 if (PTR_ERR(phy->optclk) != -EPROBE_DEFER) {
386 dev_dbg(&pdev->dev,
387 "unable to get usb_otg_ss_refclk960m\n");
388 }
389 } else {
390 dev_warn(&pdev->dev,
391 "found usb_otg_ss_refclk960m, please fix DTS\n");
392 }
393 }
394
395 otg->set_host = omap_usb_set_host;
396 otg->set_peripheral = omap_usb_set_peripheral;
397 if (phy_data->flags & OMAP_USB2_HAS_SET_VBUS)
398 otg->set_vbus = omap_usb_set_vbus;
399 if (phy_data->flags & OMAP_USB2_HAS_START_SRP)
400 otg->start_srp = omap_usb_start_srp;
401 otg->usb_phy = &phy->phy;
402
403 platform_set_drvdata(pdev, phy);
404 pm_runtime_enable(phy->dev);
405
406 generic_phy = devm_phy_create(phy->dev, NULL, &ops);
407 if (IS_ERR(generic_phy)) {
408 pm_runtime_disable(phy->dev);
409 return PTR_ERR(generic_phy);
410 }
411
412 phy_set_drvdata(generic_phy, phy);
413 omap_usb_power_off(generic_phy);
414
415 phy_provider = devm_of_phy_provider_register(phy->dev,
416 of_phy_simple_xlate);
417 if (IS_ERR(phy_provider)) {
418 pm_runtime_disable(phy->dev);
419 return PTR_ERR(phy_provider);
420 }
421
422
423 usb_add_phy_dev(&phy->phy);
424
425 return 0;
426 }
427
428 static int omap_usb2_remove(struct platform_device *pdev)
429 {
430 struct omap_usb *phy = platform_get_drvdata(pdev);
431
432 usb_remove_phy(&phy->phy);
433 pm_runtime_disable(phy->dev);
434
435 return 0;
436 }
437
438 static struct platform_driver omap_usb2_driver = {
439 .probe = omap_usb2_probe,
440 .remove = omap_usb2_remove,
441 .driver = {
442 .name = "omap-usb2",
443 .of_match_table = omap_usb2_id_table,
444 },
445 };
446
447 module_platform_driver(omap_usb2_driver);
448
449 MODULE_ALIAS("platform:omap_usb2");
450 MODULE_AUTHOR("Texas Instruments Inc.");
451 MODULE_DESCRIPTION("OMAP USB2 phy driver");
452 MODULE_LICENSE("GPL v2");