aboutsummaryrefslogtreecommitdiff
path: root/drivers/usb/dwc3/dwc3-generic.c
blob: 1755289473b0ee3229028ba3bd68dfc5a9db8fb3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
// SPDX-License-Identifier: GPL-2.0
/*
 * Generic DWC3 Glue layer
 *
 * Copyright (C) 2016 - 2018 Xilinx, Inc.
 *
 * Based on dwc3-omap.c.
 */

#include <common.h>
#include <cpu_func.h>
#include <log.h>
#include <dm.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <dwc3-uboot.h>
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <malloc.h>
#include <usb.h>
#include "core.h"
#include "gadget.h"
#include <reset.h>
#include <clk.h>
#include <usb/xhci.h>

struct dwc3_glue_data {
	struct clk_bulk		clks;
	struct reset_ctl_bulk	resets;
	fdt_addr_t regs;
};

struct dwc3_generic_plat {
	fdt_addr_t base;
	u32 maximum_speed;
	enum usb_dr_mode dr_mode;
};

struct dwc3_generic_priv {
	void *base;
	struct dwc3 dwc3;
	struct phy_bulk phys;
};

struct dwc3_generic_host_priv {
	struct xhci_ctrl xhci_ctrl;
	struct dwc3_generic_priv gen_priv;
};

static int dwc3_generic_probe(struct udevice *dev,
			      struct dwc3_generic_priv *priv)
{
	int rc;
	struct dwc3_generic_plat *plat = dev_get_platdata(dev);
	struct dwc3 *dwc3 = &priv->dwc3;
	struct dwc3_glue_data *glue = dev_get_platdata(dev->parent);

	dwc3->dev = dev;
	dwc3->maximum_speed = plat->maximum_speed;
	dwc3->dr_mode = plat->dr_mode;
#if CONFIG_IS_ENABLED(OF_CONTROL)
	dwc3_of_parse(dwc3);
#endif

	/*
	 * It must hold whole USB3.0 OTG controller in resetting to hold pipe
	 * power state in P2 before initializing TypeC PHY on RK3399 platform.
	 */
	if (device_is_compatible(dev->parent, "rockchip,rk3399-dwc3")) {
		reset_assert_bulk(&glue->resets);
		udelay(1);
	}

	rc = dwc3_setup_phy(dev, &priv->phys);
	if (rc && rc != -ENOTSUPP)
		return rc;

	if (device_is_compatible(dev->parent, "rockchip,rk3399-dwc3"))
		reset_deassert_bulk(&glue->resets);

	priv->base = map_physmem(plat->base, DWC3_OTG_REGS_END, MAP_NOCACHE);
	dwc3->regs = priv->base + DWC3_GLOBALS_REGS_START;


	rc =  dwc3_init(dwc3);
	if (rc) {
		unmap_physmem(priv->base, MAP_NOCACHE);
		return rc;
	}

	return 0;
}

static int dwc3_generic_remove(struct udevice *dev,
			       struct dwc3_generic_priv *priv)
{
	struct dwc3 *dwc3 = &priv->dwc3;

	dwc3_remove(dwc3);
	dwc3_shutdown_phy(dev, &priv->phys);
	unmap_physmem(dwc3->regs, MAP_NOCACHE);

	return 0;
}

static int dwc3_generic_ofdata_to_platdata(struct udevice *dev)
{
	struct dwc3_generic_plat *plat = dev_get_platdata(dev);
	ofnode node = dev->node;

	plat->base = dev_read_addr(dev);

	plat->maximum_speed = usb_get_maximum_speed(node);
	if (plat->maximum_speed == USB_SPEED_UNKNOWN) {
		pr_info("No USB maximum speed specified. Using super speed\n");
		plat->maximum_speed = USB_SPEED_SUPER;
	}

	plat->dr_mode = usb_get_dr_mode(node);
	if (plat->dr_mode == USB_DR_MODE_UNKNOWN) {
		pr_err("Invalid usb mode setup\n");
		return -ENODEV;
	}

	return 0;
}

#if CONFIG_IS_ENABLED(DM_USB_GADGET)
int dm_usb_gadget_handle_interrupts(struct udevice *dev)
{
	struct dwc3_generic_priv *priv = dev_get_priv(dev);
	struct dwc3 *dwc3 = &priv->dwc3;

	dwc3_gadget_uboot_handle_interrupt(dwc3);

	return 0;
}

static int dwc3_generic_peripheral_probe(struct udevice *dev)
{
	struct dwc3_generic_priv *priv = dev_get_priv(dev);

	return dwc3_generic_probe(dev, priv);
}

static int dwc3_generic_peripheral_remove(struct udevice *dev)
{
	struct dwc3_generic_priv *priv = dev_get_priv(dev);

	return dwc3_generic_remove(dev, priv);
}

U_BOOT_DRIVER(dwc3_generic_peripheral) = {
	.name	= "dwc3-generic-peripheral",
	.id	= UCLASS_USB_GADGET_GENERIC,
	.ofdata_to_platdata = dwc3_generic_ofdata_to_platdata,
	.probe = dwc3_generic_peripheral_probe,
	.remove = dwc3_generic_peripheral_remove,
	.priv_auto	= sizeof(struct dwc3_generic_priv),
	.plat_auto	= sizeof(struct dwc3_generic_plat),
};
#endif

#if defined(CONFIG_SPL_USB_HOST_SUPPORT) || !defined(CONFIG_SPL_BUILD)
static int dwc3_generic_host_probe(struct udevice *dev)
{
	struct xhci_hcor *hcor;
	struct xhci_hccr *hccr;
	struct dwc3_generic_host_priv *priv = dev_get_priv(dev);
	int rc;

	rc = dwc3_generic_probe(dev, &priv->gen_priv);
	if (rc)
		return rc;

	hccr = (struct xhci_hccr *)priv->gen_priv.base;
	hcor = (struct xhci_hcor *)(priv->gen_priv.base +
			HC_LENGTH(xhci_readl(&(hccr)->cr_capbase)));

	return xhci_register(dev, hccr, hcor);
}

static int dwc3_generic_host_remove(struct udevice *dev)
{
	struct dwc3_generic_host_priv *priv = dev_get_priv(dev);
	int rc;

	rc = xhci_deregister(dev);
	if (rc)
		return rc;

	return dwc3_generic_remove(dev, &priv->gen_priv);
}

U_BOOT_DRIVER(dwc3_generic_host) = {
	.name	= "dwc3-generic-host",
	.id	= UCLASS_USB,
	.ofdata_to_platdata = dwc3_generic_ofdata_to_platdata,
	.probe = dwc3_generic_host_probe,
	.remove = dwc3_generic_host_remove,
	.priv_auto	= sizeof(struct dwc3_generic_host_priv),
	.plat_auto	= sizeof(struct dwc3_generic_plat),
	.ops = &xhci_usb_ops,
	.flags = DM_FLAG_ALLOC_PRIV_DMA,
};
#endif

struct dwc3_glue_ops {
	void (*select_dr_mode)(struct udevice *dev, int index,
			       enum usb_dr_mode mode);
};

void dwc3_ti_select_dr_mode(struct udevice *dev, int index,
			    enum usb_dr_mode mode)
{
#define USBOTGSS_UTMI_OTG_STATUS		0x0084
#define USBOTGSS_UTMI_OTG_OFFSET		0x0480

/* UTMI_OTG_STATUS REGISTER */
#define USBOTGSS_UTMI_OTG_STATUS_SW_MODE	BIT(31)
#define USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT	BIT(9)
#define USBOTGSS_UTMI_OTG_STATUS_TXBITSTUFFENABLE BIT(8)
#define USBOTGSS_UTMI_OTG_STATUS_IDDIG		BIT(4)
#define USBOTGSS_UTMI_OTG_STATUS_SESSEND	BIT(3)
#define USBOTGSS_UTMI_OTG_STATUS_SESSVALID	BIT(2)
#define USBOTGSS_UTMI_OTG_STATUS_VBUSVALID	BIT(1)
enum dwc3_omap_utmi_mode {
	DWC3_OMAP_UTMI_MODE_UNKNOWN = 0,
	DWC3_OMAP_UTMI_MODE_HW,
	DWC3_OMAP_UTMI_MODE_SW,
};

	u32 use_id_pin;
	u32 host_mode;
	u32 reg;
	u32 utmi_mode;
	u32 utmi_status_offset = USBOTGSS_UTMI_OTG_STATUS;

	struct dwc3_glue_data *glue = dev_get_platdata(dev);
	void *base = map_physmem(glue->regs, 0x10000, MAP_NOCACHE);

	if (device_is_compatible(dev, "ti,am437x-dwc3"))
		utmi_status_offset += USBOTGSS_UTMI_OTG_OFFSET;

	utmi_mode = dev_read_u32_default(dev, "utmi-mode",
					 DWC3_OMAP_UTMI_MODE_UNKNOWN);
	if (utmi_mode != DWC3_OMAP_UTMI_MODE_HW) {
		debug("%s: OTG is not supported. defaulting to PERIPHERAL\n",
		      dev->name);
		mode = USB_DR_MODE_PERIPHERAL;
	}

	switch (mode)  {
	case USB_DR_MODE_PERIPHERAL:
		use_id_pin = 0;
		host_mode = 0;
		break;
	case USB_DR_MODE_HOST:
		use_id_pin = 0;
		host_mode = 1;
		break;
	case USB_DR_MODE_OTG:
	default:
		use_id_pin = 1;
		host_mode = 0;
		break;
	}

	reg = readl(base + utmi_status_offset);

	reg &= ~(USBOTGSS_UTMI_OTG_STATUS_SW_MODE);
	if (!use_id_pin)
		reg |= USBOTGSS_UTMI_OTG_STATUS_SW_MODE;

	writel(reg, base + utmi_status_offset);

	reg &= ~(USBOTGSS_UTMI_OTG_STATUS_SESSEND |
		USBOTGSS_UTMI_OTG_STATUS_VBUSVALID |
		USBOTGSS_UTMI_OTG_STATUS_IDDIG);

	reg |= USBOTGSS_UTMI_OTG_STATUS_SESSVALID |
		USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT;

	if (!host_mode)
		reg |= USBOTGSS_UTMI_OTG_STATUS_IDDIG |
			USBOTGSS_UTMI_OTG_STATUS_VBUSVALID;

	writel(reg, base + utmi_status_offset);

	unmap_physmem(base, MAP_NOCACHE);
}

struct dwc3_glue_ops ti_ops = {
	.select_dr_mode = dwc3_ti_select_dr_mode,
};

static int dwc3_glue_bind(struct udevice *parent)
{
	ofnode node;
	int ret;

	ofnode_for_each_subnode(node, parent->node) {
		const char *name = ofnode_get_name(node);
		enum usb_dr_mode dr_mode;
		struct udevice *dev;
		const char *driver = NULL;

		debug("%s: subnode name: %s\n", __func__, name);

		dr_mode = usb_get_dr_mode(node);

		switch (dr_mode) {
		case USB_DR_MODE_PERIPHERAL:
		case USB_DR_MODE_OTG:
#if CONFIG_IS_ENABLED(DM_USB_GADGET)
			debug("%s: dr_mode: OTG or Peripheral\n", __func__);
			driver = "dwc3-generic-peripheral";
#endif
			break;
#if defined(CONFIG_SPL_USB_HOST_SUPPORT) || !defined(CONFIG_SPL_BUILD)
		case USB_DR_MODE_HOST:
			debug("%s: dr_mode: HOST\n", __func__);
			driver = "dwc3-generic-host";
			break;
#endif
		default:
			debug("%s: unsupported dr_mode\n", __func__);
			return -ENODEV;
		};

		if (!driver)
			continue;

		ret = device_bind_driver_to_node(parent, driver, name,
						 node, &dev);
		if (ret) {
			debug("%s: not able to bind usb device mode\n",
			      __func__);
			return ret;
		}
	}

	return 0;
}

static int dwc3_glue_reset_init(struct udevice *dev,
				struct dwc3_glue_data *glue)
{
	int ret;

	ret = reset_get_bulk(dev, &glue->resets);
	if (ret == -ENOTSUPP || ret == -ENOENT)
		return 0;
	else if (ret)
		return ret;

	ret = reset_deassert_bulk(&glue->resets);
	if (ret) {
		reset_release_bulk(&glue->resets);
		return ret;
	}

	return 0;
}

static int dwc3_glue_clk_init(struct udevice *dev,
			      struct dwc3_glue_data *glue)
{
	int ret;

	ret = clk_get_bulk(dev, &glue->clks);
	if (ret == -ENOSYS || ret == -ENOENT)
		return 0;
	if (ret)
		return ret;

#if CONFIG_IS_ENABLED(CLK)
	ret = clk_enable_bulk(&glue->clks);
	if (ret) {
		clk_release_bulk(&glue->clks);
		return ret;
	}
#endif

	return 0;
}

static int dwc3_glue_probe(struct udevice *dev)
{
	struct dwc3_glue_ops *ops = (struct dwc3_glue_ops *)dev_get_driver_data(dev);
	struct dwc3_glue_data *glue = dev_get_platdata(dev);
	struct udevice *child = NULL;
	int index = 0;
	int ret;

	glue->regs = dev_read_addr(dev);

	ret = dwc3_glue_clk_init(dev, glue);
	if (ret)
		return ret;

	ret = dwc3_glue_reset_init(dev, glue);
	if (ret)
		return ret;

	ret = device_find_first_child(dev, &child);
	if (ret)
		return ret;

	if (glue->resets.count == 0) {
		ret = dwc3_glue_reset_init(child, glue);
		if (ret)
			return ret;
	}

	while (child) {
		enum usb_dr_mode dr_mode;

		dr_mode = usb_get_dr_mode(child->node);
		device_find_next_child(&child);
		if (ops && ops->select_dr_mode)
			ops->select_dr_mode(dev, index, dr_mode);
		index++;
	}

	return 0;
}

static int dwc3_glue_remove(struct udevice *dev)
{
	struct dwc3_glue_data *glue = dev_get_platdata(dev);

	reset_release_bulk(&glue->resets);

	clk_release_bulk(&glue->clks);

	return 0;
}

static const struct udevice_id dwc3_glue_ids[] = {
	{ .compatible = "xlnx,zynqmp-dwc3" },
	{ .compatible = "xlnx,versal-dwc3" },
	{ .compatible = "ti,keystone-dwc3"},
	{ .compatible = "ti,dwc3", .data = (ulong)&ti_ops },
	{ .compatible = "ti,am437x-dwc3", .data = (ulong)&ti_ops },
	{ .compatible = "ti,am654-dwc3" },
	{ .compatible = "rockchip,rk3328-dwc3" },
	{ .compatible = "rockchip,rk3399-dwc3" },
	{ .compatible = "qcom,dwc3" },
	{ }
};

U_BOOT_DRIVER(dwc3_generic_wrapper) = {
	.name	= "dwc3-generic-wrapper",
	.id	= UCLASS_NOP,
	.of_match = dwc3_glue_ids,
	.bind = dwc3_glue_bind,
	.probe = dwc3_glue_probe,
	.remove = dwc3_glue_remove,
	.plat_auto	= sizeof(struct dwc3_glue_data),

};