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11#include <linux/clk.h>
12#include <linux/version.h>
13#include <linux/module.h>
14#include <linux/kernel.h>
15#include <linux/slab.h>
16#include <linux/spinlock.h>
17#include <linux/platform_device.h>
18#include <linux/pm_runtime.h>
19#include <linux/interrupt.h>
20#include <linux/ioport.h>
21#include <linux/io.h>
22#include <linux/list.h>
23#include <linux/delay.h>
24#include <linux/dma-mapping.h>
25#include <linux/of.h>
26#include <linux/acpi.h>
27#include <linux/pinctrl/consumer.h>
28#include <linux/reset.h>
29
30#include <linux/usb/ch9.h>
31#include <linux/usb/gadget.h>
32#include <linux/usb/of.h>
33#include <linux/usb/otg.h>
34
35#include "core.h"
36#include "gadget.h"
37#include "io.h"
38
39#include "debug.h"
40
41#define DWC3_DEFAULT_AUTOSUSPEND_DELAY 5000
42
43
44
45
46
47static int dwc3_get_dr_mode(struct dwc3 *dwc)
48{
49 enum usb_dr_mode mode;
50 struct device *dev = dwc->dev;
51 unsigned int hw_mode;
52
53 if (dwc->dr_mode == USB_DR_MODE_UNKNOWN)
54 dwc->dr_mode = USB_DR_MODE_OTG;
55
56 mode = dwc->dr_mode;
57 hw_mode = DWC3_GHWPARAMS0_MODE(dwc->hwparams.hwparams0);
58
59 switch (hw_mode) {
60 case DWC3_GHWPARAMS0_MODE_GADGET:
61 if (IS_ENABLED(CONFIG_USB_DWC3_HOST)) {
62 dev_err(dev,
63 "Controller does not support host mode.\n");
64 return -EINVAL;
65 }
66 mode = USB_DR_MODE_PERIPHERAL;
67 break;
68 case DWC3_GHWPARAMS0_MODE_HOST:
69 if (IS_ENABLED(CONFIG_USB_DWC3_GADGET)) {
70 dev_err(dev,
71 "Controller does not support device mode.\n");
72 return -EINVAL;
73 }
74 mode = USB_DR_MODE_HOST;
75 break;
76 default:
77 if (IS_ENABLED(CONFIG_USB_DWC3_HOST))
78 mode = USB_DR_MODE_HOST;
79 else if (IS_ENABLED(CONFIG_USB_DWC3_GADGET))
80 mode = USB_DR_MODE_PERIPHERAL;
81
82
83
84
85
86
87 if (mode == USB_DR_MODE_OTG &&
88 dwc->revision >= DWC3_REVISION_330A)
89 mode = USB_DR_MODE_PERIPHERAL;
90 }
91
92 if (mode != dwc->dr_mode) {
93 dev_warn(dev,
94 "Configuration mismatch. dr_mode forced to %s\n",
95 mode == USB_DR_MODE_HOST ? "host" : "gadget");
96
97 dwc->dr_mode = mode;
98 }
99
100 return 0;
101}
102
103void dwc3_set_prtcap(struct dwc3 *dwc, u32 mode)
104{
105 u32 reg;
106
107 reg = dwc3_readl(dwc->regs, DWC3_GCTL);
108 reg &= ~(DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG));
109 reg |= DWC3_GCTL_PRTCAPDIR(mode);
110 dwc3_writel(dwc->regs, DWC3_GCTL, reg);
111
112 dwc->current_dr_role = mode;
113}
114
115static void __dwc3_set_mode(struct work_struct *work)
116{
117 struct dwc3 *dwc = work_to_dwc(work);
118 unsigned long flags;
119 int ret;
120
121 if (dwc->dr_mode != USB_DR_MODE_OTG)
122 return;
123
124 if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_OTG)
125 dwc3_otg_update(dwc, 0);
126
127 if (!dwc->desired_dr_role)
128 return;
129
130 if (dwc->desired_dr_role == dwc->current_dr_role)
131 return;
132
133 if (dwc->desired_dr_role == DWC3_GCTL_PRTCAP_OTG && dwc->edev)
134 return;
135
136 switch (dwc->current_dr_role) {
137 case DWC3_GCTL_PRTCAP_HOST:
138 dwc3_host_exit(dwc);
139 break;
140 case DWC3_GCTL_PRTCAP_DEVICE:
141 dwc3_gadget_exit(dwc);
142 dwc3_event_buffers_cleanup(dwc);
143 break;
144 case DWC3_GCTL_PRTCAP_OTG:
145 dwc3_otg_exit(dwc);
146 spin_lock_irqsave(&dwc->lock, flags);
147 dwc->desired_otg_role = DWC3_OTG_ROLE_IDLE;
148 spin_unlock_irqrestore(&dwc->lock, flags);
149 dwc3_otg_update(dwc, 1);
150 break;
151 default:
152 break;
153 }
154
155 spin_lock_irqsave(&dwc->lock, flags);
156
157 dwc3_set_prtcap(dwc, dwc->desired_dr_role);
158
159 spin_unlock_irqrestore(&dwc->lock, flags);
160
161 switch (dwc->desired_dr_role) {
162 case DWC3_GCTL_PRTCAP_HOST:
163 ret = dwc3_host_init(dwc);
164 if (ret) {
165 dev_err(dwc->dev, "failed to initialize host\n");
166 } else {
167 if (dwc->usb2_phy)
168 otg_set_vbus(dwc->usb2_phy->otg, true);
169 phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST);
170 phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_HOST);
171 }
172 break;
173 case DWC3_GCTL_PRTCAP_DEVICE:
174 dwc3_event_buffers_setup(dwc);
175
176 if (dwc->usb2_phy)
177 otg_set_vbus(dwc->usb2_phy->otg, false);
178 phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_DEVICE);
179 phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_DEVICE);
180
181 ret = dwc3_gadget_init(dwc);
182 if (ret)
183 dev_err(dwc->dev, "failed to initialize peripheral\n");
184 break;
185 case DWC3_GCTL_PRTCAP_OTG:
186 dwc3_otg_init(dwc);
187 dwc3_otg_update(dwc, 0);
188 break;
189 default:
190 break;
191 }
192
193}
194
195void dwc3_set_mode(struct dwc3 *dwc, u32 mode)
196{
197 unsigned long flags;
198
199 spin_lock_irqsave(&dwc->lock, flags);
200 dwc->desired_dr_role = mode;
201 spin_unlock_irqrestore(&dwc->lock, flags);
202
203 queue_work(system_freezable_wq, &dwc->drd_work);
204}
205
206u32 dwc3_core_fifo_space(struct dwc3_ep *dep, u8 type)
207{
208 struct dwc3 *dwc = dep->dwc;
209 u32 reg;
210
211 dwc3_writel(dwc->regs, DWC3_GDBGFIFOSPACE,
212 DWC3_GDBGFIFOSPACE_NUM(dep->number) |
213 DWC3_GDBGFIFOSPACE_TYPE(type));
214
215 reg = dwc3_readl(dwc->regs, DWC3_GDBGFIFOSPACE);
216
217 return DWC3_GDBGFIFOSPACE_SPACE_AVAILABLE(reg);
218}
219
220
221
222
223
224static int dwc3_core_soft_reset(struct dwc3 *dwc)
225{
226 u32 reg;
227 int retries = 1000;
228 int ret;
229
230 usb_phy_init(dwc->usb2_phy);
231 usb_phy_init(dwc->usb3_phy);
232 ret = phy_init(dwc->usb2_generic_phy);
233 if (ret < 0)
234 return ret;
235
236 ret = phy_init(dwc->usb3_generic_phy);
237 if (ret < 0) {
238 phy_exit(dwc->usb2_generic_phy);
239 return ret;
240 }
241
242
243
244
245
246
247 if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_HOST)
248 return 0;
249
250 reg = dwc3_readl(dwc->regs, DWC3_DCTL);
251 reg |= DWC3_DCTL_CSFTRST;
252 dwc3_writel(dwc->regs, DWC3_DCTL, reg);
253
254
255
256
257
258
259
260 if (dwc3_is_usb31(dwc) && dwc->revision >= DWC3_USB31_REVISION_190A)
261 retries = 10;
262
263 do {
264 reg = dwc3_readl(dwc->regs, DWC3_DCTL);
265 if (!(reg & DWC3_DCTL_CSFTRST))
266 goto done;
267
268 if (dwc3_is_usb31(dwc) &&
269 dwc->revision >= DWC3_USB31_REVISION_190A)
270 msleep(20);
271 else
272 udelay(1);
273 } while (--retries);
274
275 phy_exit(dwc->usb3_generic_phy);
276 phy_exit(dwc->usb2_generic_phy);
277
278 return -ETIMEDOUT;
279
280done:
281
282
283
284
285
286 if (dwc3_is_usb31(dwc) && dwc->revision <= DWC3_USB31_REVISION_180A)
287 msleep(50);
288
289 return 0;
290}
291
292
293
294
295
296static void dwc3_frame_length_adjustment(struct dwc3 *dwc)
297{
298 u32 reg;
299 u32 dft;
300
301 if (dwc->revision < DWC3_REVISION_250A)
302 return;
303
304 if (dwc->fladj == 0)
305 return;
306
307 reg = dwc3_readl(dwc->regs, DWC3_GFLADJ);
308 dft = reg & DWC3_GFLADJ_30MHZ_MASK;
309 if (dft != dwc->fladj) {
310 reg &= ~DWC3_GFLADJ_30MHZ_MASK;
311 reg |= DWC3_GFLADJ_30MHZ_SDBND_SEL | dwc->fladj;
312 dwc3_writel(dwc->regs, DWC3_GFLADJ, reg);
313 }
314}
315
316
317
318
319
320
321static void dwc3_free_one_event_buffer(struct dwc3 *dwc,
322 struct dwc3_event_buffer *evt)
323{
324 dma_free_coherent(dwc->sysdev, evt->length, evt->buf, evt->dma);
325}
326
327
328
329
330
331
332
333
334
335static struct dwc3_event_buffer *dwc3_alloc_one_event_buffer(struct dwc3 *dwc,
336 unsigned length)
337{
338 struct dwc3_event_buffer *evt;
339
340 evt = devm_kzalloc(dwc->dev, sizeof(*evt), GFP_KERNEL);
341 if (!evt)
342 return ERR_PTR(-ENOMEM);
343
344 evt->dwc = dwc;
345 evt->length = length;
346 evt->cache = devm_kzalloc(dwc->dev, length, GFP_KERNEL);
347 if (!evt->cache)
348 return ERR_PTR(-ENOMEM);
349
350 evt->buf = dma_alloc_coherent(dwc->sysdev, length,
351 &evt->dma, GFP_KERNEL);
352 if (!evt->buf)
353 return ERR_PTR(-ENOMEM);
354
355 return evt;
356}
357
358
359
360
361
362static void dwc3_free_event_buffers(struct dwc3 *dwc)
363{
364 struct dwc3_event_buffer *evt;
365
366 evt = dwc->ev_buf;
367 if (evt)
368 dwc3_free_one_event_buffer(dwc, evt);
369}
370
371
372
373
374
375
376
377
378
379static int dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned length)
380{
381 struct dwc3_event_buffer *evt;
382
383 evt = dwc3_alloc_one_event_buffer(dwc, length);
384 if (IS_ERR(evt)) {
385 dev_err(dwc->dev, "can't allocate event buffer\n");
386 return PTR_ERR(evt);
387 }
388 dwc->ev_buf = evt;
389
390 return 0;
391}
392
393
394
395
396
397
398
399int dwc3_event_buffers_setup(struct dwc3 *dwc)
400{
401 struct dwc3_event_buffer *evt;
402
403 evt = dwc->ev_buf;
404 evt->lpos = 0;
405 dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(0),
406 lower_32_bits(evt->dma));
407 dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(0),
408 upper_32_bits(evt->dma));
409 dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(0),
410 DWC3_GEVNTSIZ_SIZE(evt->length));
411 dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(0), 0);
412
413 return 0;
414}
415
416void dwc3_event_buffers_cleanup(struct dwc3 *dwc)
417{
418 struct dwc3_event_buffer *evt;
419
420 evt = dwc->ev_buf;
421
422 evt->lpos = 0;
423
424 dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(0), 0);
425 dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(0), 0);
426 dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(0), DWC3_GEVNTSIZ_INTMASK
427 | DWC3_GEVNTSIZ_SIZE(0));
428 dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(0), 0);
429}
430
431static int dwc3_alloc_scratch_buffers(struct dwc3 *dwc)
432{
433 if (!dwc->has_hibernation)
434 return 0;
435
436 if (!dwc->nr_scratch)
437 return 0;
438
439 dwc->scratchbuf = kmalloc_array(dwc->nr_scratch,
440 DWC3_SCRATCHBUF_SIZE, GFP_KERNEL);
441 if (!dwc->scratchbuf)
442 return -ENOMEM;
443
444 return 0;
445}
446
447static int dwc3_setup_scratch_buffers(struct dwc3 *dwc)
448{
449 dma_addr_t scratch_addr;
450 u32 param;
451 int ret;
452
453 if (!dwc->has_hibernation)
454 return 0;
455
456 if (!dwc->nr_scratch)
457 return 0;
458
459
460 if (!WARN_ON(dwc->scratchbuf))
461 return 0;
462
463 scratch_addr = dma_map_single(dwc->sysdev, dwc->scratchbuf,
464 dwc->nr_scratch * DWC3_SCRATCHBUF_SIZE,
465 DMA_BIDIRECTIONAL);
466 if (dma_mapping_error(dwc->sysdev, scratch_addr)) {
467 dev_err(dwc->sysdev, "failed to map scratch buffer\n");
468 ret = -EFAULT;
469 goto err0;
470 }
471
472 dwc->scratch_addr = scratch_addr;
473
474 param = lower_32_bits(scratch_addr);
475
476 ret = dwc3_send_gadget_generic_command(dwc,
477 DWC3_DGCMD_SET_SCRATCHPAD_ADDR_LO, param);
478 if (ret < 0)
479 goto err1;
480
481 param = upper_32_bits(scratch_addr);
482
483 ret = dwc3_send_gadget_generic_command(dwc,
484 DWC3_DGCMD_SET_SCRATCHPAD_ADDR_HI, param);
485 if (ret < 0)
486 goto err1;
487
488 return 0;
489
490err1:
491 dma_unmap_single(dwc->sysdev, dwc->scratch_addr, dwc->nr_scratch *
492 DWC3_SCRATCHBUF_SIZE, DMA_BIDIRECTIONAL);
493
494err0:
495 return ret;
496}
497
498static void dwc3_free_scratch_buffers(struct dwc3 *dwc)
499{
500 if (!dwc->has_hibernation)
501 return;
502
503 if (!dwc->nr_scratch)
504 return;
505
506
507 if (!WARN_ON(dwc->scratchbuf))
508 return;
509
510 dma_unmap_single(dwc->sysdev, dwc->scratch_addr, dwc->nr_scratch *
511 DWC3_SCRATCHBUF_SIZE, DMA_BIDIRECTIONAL);
512 kfree(dwc->scratchbuf);
513}
514
515static void dwc3_core_num_eps(struct dwc3 *dwc)
516{
517 struct dwc3_hwparams *parms = &dwc->hwparams;
518
519 dwc->num_eps = DWC3_NUM_EPS(parms);
520}
521
522static void dwc3_cache_hwparams(struct dwc3 *dwc)
523{
524 struct dwc3_hwparams *parms = &dwc->hwparams;
525
526 parms->hwparams0 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS0);
527 parms->hwparams1 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS1);
528 parms->hwparams2 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS2);
529 parms->hwparams3 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS3);
530 parms->hwparams4 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS4);
531 parms->hwparams5 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS5);
532 parms->hwparams6 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS6);
533 parms->hwparams7 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS7);
534 parms->hwparams8 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS8);
535}
536
537static int dwc3_core_ulpi_init(struct dwc3 *dwc)
538{
539 int intf;
540 int ret = 0;
541
542 intf = DWC3_GHWPARAMS3_HSPHY_IFC(dwc->hwparams.hwparams3);
543
544 if (intf == DWC3_GHWPARAMS3_HSPHY_IFC_ULPI ||
545 (intf == DWC3_GHWPARAMS3_HSPHY_IFC_UTMI_ULPI &&
546 dwc->hsphy_interface &&
547 !strncmp(dwc->hsphy_interface, "ulpi", 4)))
548 ret = dwc3_ulpi_init(dwc);
549
550 return ret;
551}
552
553
554
555
556
557
558
559
560
561static int dwc3_phy_setup(struct dwc3 *dwc)
562{
563 unsigned int hw_mode;
564 u32 reg;
565
566 hw_mode = DWC3_GHWPARAMS0_MODE(dwc->hwparams.hwparams0);
567
568 reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
569
570
571
572
573
574 reg &= ~DWC3_GUSB3PIPECTL_UX_EXIT_PX;
575
576
577
578
579
580
581
582 if (dwc->revision > DWC3_REVISION_194A)
583 reg |= DWC3_GUSB3PIPECTL_SUSPHY;
584
585
586
587
588
589
590 if (hw_mode == DWC3_GHWPARAMS0_MODE_DRD)
591 reg &= ~DWC3_GUSB3PIPECTL_SUSPHY;
592
593 if (dwc->u2ss_inp3_quirk)
594 reg |= DWC3_GUSB3PIPECTL_U2SSINP3OK;
595
596 if (dwc->dis_rxdet_inp3_quirk)
597 reg |= DWC3_GUSB3PIPECTL_DISRXDETINP3;
598
599 if (dwc->req_p1p2p3_quirk)
600 reg |= DWC3_GUSB3PIPECTL_REQP1P2P3;
601
602 if (dwc->del_p1p2p3_quirk)
603 reg |= DWC3_GUSB3PIPECTL_DEP1P2P3_EN;
604
605 if (dwc->del_phy_power_chg_quirk)
606 reg |= DWC3_GUSB3PIPECTL_DEPOCHANGE;
607
608 if (dwc->lfps_filter_quirk)
609 reg |= DWC3_GUSB3PIPECTL_LFPSFILT;
610
611 if (dwc->rx_detect_poll_quirk)
612 reg |= DWC3_GUSB3PIPECTL_RX_DETOPOLL;
613
614 if (dwc->tx_de_emphasis_quirk)
615 reg |= DWC3_GUSB3PIPECTL_TX_DEEPH(dwc->tx_de_emphasis);
616
617 if (dwc->dis_u3_susphy_quirk)
618 reg &= ~DWC3_GUSB3PIPECTL_SUSPHY;
619
620 if (dwc->dis_del_phy_power_chg_quirk)
621 reg &= ~DWC3_GUSB3PIPECTL_DEPOCHANGE;
622
623 dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
624
625 reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
626
627
628 switch (DWC3_GHWPARAMS3_HSPHY_IFC(dwc->hwparams.hwparams3)) {
629 case DWC3_GHWPARAMS3_HSPHY_IFC_UTMI_ULPI:
630 if (dwc->hsphy_interface &&
631 !strncmp(dwc->hsphy_interface, "utmi", 4)) {
632 reg &= ~DWC3_GUSB2PHYCFG_ULPI_UTMI;
633 break;
634 } else if (dwc->hsphy_interface &&
635 !strncmp(dwc->hsphy_interface, "ulpi", 4)) {
636 reg |= DWC3_GUSB2PHYCFG_ULPI_UTMI;
637 dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
638 } else {
639
640 if (!(reg & DWC3_GUSB2PHYCFG_ULPI_UTMI))
641 break;
642 }
643
644 case DWC3_GHWPARAMS3_HSPHY_IFC_ULPI:
645
646 default:
647 break;
648 }
649
650 switch (dwc->hsphy_mode) {
651 case USBPHY_INTERFACE_MODE_UTMI:
652 reg &= ~(DWC3_GUSB2PHYCFG_PHYIF_MASK |
653 DWC3_GUSB2PHYCFG_USBTRDTIM_MASK);
654 reg |= DWC3_GUSB2PHYCFG_PHYIF(UTMI_PHYIF_8_BIT) |
655 DWC3_GUSB2PHYCFG_USBTRDTIM(USBTRDTIM_UTMI_8_BIT);
656 break;
657 case USBPHY_INTERFACE_MODE_UTMIW:
658 reg &= ~(DWC3_GUSB2PHYCFG_PHYIF_MASK |
659 DWC3_GUSB2PHYCFG_USBTRDTIM_MASK);
660 reg |= DWC3_GUSB2PHYCFG_PHYIF(UTMI_PHYIF_16_BIT) |
661 DWC3_GUSB2PHYCFG_USBTRDTIM(USBTRDTIM_UTMI_16_BIT);
662 break;
663 default:
664 break;
665 }
666
667
668
669
670
671
672
673 if (dwc->revision > DWC3_REVISION_194A)
674 reg |= DWC3_GUSB2PHYCFG_SUSPHY;
675
676
677
678
679
680
681 if (hw_mode == DWC3_GHWPARAMS0_MODE_DRD)
682 reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
683
684 if (dwc->dis_u2_susphy_quirk)
685 reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
686
687 if (dwc->dis_enblslpm_quirk)
688 reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM;
689 else
690 reg |= DWC3_GUSB2PHYCFG_ENBLSLPM;
691
692 if (dwc->dis_u2_freeclk_exists_quirk)
693 reg &= ~DWC3_GUSB2PHYCFG_U2_FREECLK_EXISTS;
694
695 dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
696
697 return 0;
698}
699
700static void dwc3_core_exit(struct dwc3 *dwc)
701{
702 dwc3_event_buffers_cleanup(dwc);
703
704 usb_phy_shutdown(dwc->usb2_phy);
705 usb_phy_shutdown(dwc->usb3_phy);
706 phy_exit(dwc->usb2_generic_phy);
707 phy_exit(dwc->usb3_generic_phy);
708
709 usb_phy_set_suspend(dwc->usb2_phy, 1);
710 usb_phy_set_suspend(dwc->usb3_phy, 1);
711 phy_power_off(dwc->usb2_generic_phy);
712 phy_power_off(dwc->usb3_generic_phy);
713 clk_bulk_disable_unprepare(dwc->num_clks, dwc->clks);
714 reset_control_assert(dwc->reset);
715}
716
717static bool dwc3_core_is_valid(struct dwc3 *dwc)
718{
719 u32 reg;
720
721 reg = dwc3_readl(dwc->regs, DWC3_GSNPSID);
722
723
724 if ((reg & DWC3_GSNPSID_MASK) == 0x55330000) {
725
726 dwc->revision = reg;
727 } else if ((reg & DWC3_GSNPSID_MASK) == 0x33310000) {
728
729 dwc->revision = dwc3_readl(dwc->regs, DWC3_VER_NUMBER);
730 dwc->revision |= DWC3_REVISION_IS_DWC31;
731 dwc->version_type = dwc3_readl(dwc->regs, DWC3_VER_TYPE);
732 } else {
733 return false;
734 }
735
736 return true;
737}
738
739static void dwc3_core_setup_global_control(struct dwc3 *dwc)
740{
741 u32 hwparams4 = dwc->hwparams.hwparams4;
742 u32 reg;
743
744 reg = dwc3_readl(dwc->regs, DWC3_GCTL);
745 reg &= ~DWC3_GCTL_SCALEDOWN_MASK;
746
747 switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1)) {
748 case DWC3_GHWPARAMS1_EN_PWROPT_CLK:
749
750
751
752
753
754
755
756
757
758
759
760
761 if ((dwc->dr_mode == USB_DR_MODE_HOST ||
762 dwc->dr_mode == USB_DR_MODE_OTG) &&
763 (dwc->revision >= DWC3_REVISION_210A &&
764 dwc->revision <= DWC3_REVISION_250A))
765 reg |= DWC3_GCTL_DSBLCLKGTNG | DWC3_GCTL_SOFITPSYNC;
766 else
767 reg &= ~DWC3_GCTL_DSBLCLKGTNG;
768 break;
769 case DWC3_GHWPARAMS1_EN_PWROPT_HIB:
770
771 dwc->nr_scratch = DWC3_GHWPARAMS4_HIBER_SCRATCHBUFS(hwparams4);
772
773
774
775
776
777 reg |= DWC3_GCTL_GBLHIBERNATIONEN;
778 break;
779 default:
780
781 break;
782 }
783
784
785 if (dwc->hwparams.hwparams6 & DWC3_GHWPARAMS6_EN_FPGA) {
786 dev_info(dwc->dev, "Running with FPGA optimizations\n");
787 dwc->is_fpga = true;
788 }
789
790 WARN_ONCE(dwc->disable_scramble_quirk && !dwc->is_fpga,
791 "disable_scramble cannot be used on non-FPGA builds\n");
792
793 if (dwc->disable_scramble_quirk && dwc->is_fpga)
794 reg |= DWC3_GCTL_DISSCRAMBLE;
795 else
796 reg &= ~DWC3_GCTL_DISSCRAMBLE;
797
798 if (dwc->u2exit_lfps_quirk)
799 reg |= DWC3_GCTL_U2EXIT_LFPS;
800
801
802
803
804
805
806
807 if (dwc->revision < DWC3_REVISION_190A)
808 reg |= DWC3_GCTL_U2RSTECN;
809
810 dwc3_writel(dwc->regs, DWC3_GCTL, reg);
811}
812
813static int dwc3_core_get_phy(struct dwc3 *dwc);
814static int dwc3_core_ulpi_init(struct dwc3 *dwc);
815
816
817static void dwc3_set_incr_burst_type(struct dwc3 *dwc)
818{
819 struct device *dev = dwc->dev;
820
821 bool incrx_mode;
822
823 u32 incrx_size;
824 u32 *vals;
825 u32 cfg;
826 int ntype;
827 int ret;
828 int i;
829
830 cfg = dwc3_readl(dwc->regs, DWC3_GSBUSCFG0);
831
832
833
834
835
836
837
838
839 ntype = device_property_count_u32(dev, "snps,incr-burst-type-adjustment");
840 if (ntype <= 0)
841 return;
842
843 vals = kcalloc(ntype, sizeof(u32), GFP_KERNEL);
844 if (!vals) {
845 dev_err(dev, "Error to get memory\n");
846 return;
847 }
848
849
850 ret = device_property_read_u32_array(dev,
851 "snps,incr-burst-type-adjustment", vals, ntype);
852 if (ret) {
853 kfree(vals);
854 dev_err(dev, "Error to get property\n");
855 return;
856 }
857
858 incrx_size = *vals;
859
860 if (ntype > 1) {
861
862 incrx_mode = INCRX_UNDEF_LENGTH_BURST_MODE;
863 for (i = 1; i < ntype; i++) {
864 if (vals[i] > incrx_size)
865 incrx_size = vals[i];
866 }
867 } else {
868
869 incrx_mode = INCRX_BURST_MODE;
870 }
871
872 kfree(vals);
873
874
875 cfg &= ~DWC3_GSBUSCFG0_INCRBRST_MASK;
876 if (incrx_mode)
877 cfg |= DWC3_GSBUSCFG0_INCRBRSTENA;
878 switch (incrx_size) {
879 case 256:
880 cfg |= DWC3_GSBUSCFG0_INCR256BRSTENA;
881 break;
882 case 128:
883 cfg |= DWC3_GSBUSCFG0_INCR128BRSTENA;
884 break;
885 case 64:
886 cfg |= DWC3_GSBUSCFG0_INCR64BRSTENA;
887 break;
888 case 32:
889 cfg |= DWC3_GSBUSCFG0_INCR32BRSTENA;
890 break;
891 case 16:
892 cfg |= DWC3_GSBUSCFG0_INCR16BRSTENA;
893 break;
894 case 8:
895 cfg |= DWC3_GSBUSCFG0_INCR8BRSTENA;
896 break;
897 case 4:
898 cfg |= DWC3_GSBUSCFG0_INCR4BRSTENA;
899 break;
900 case 1:
901 break;
902 default:
903 dev_err(dev, "Invalid property\n");
904 break;
905 }
906
907 dwc3_writel(dwc->regs, DWC3_GSBUSCFG0, cfg);
908}
909
910
911
912
913
914
915
916static int dwc3_core_init(struct dwc3 *dwc)
917{
918 unsigned int hw_mode;
919 u32 reg;
920 int ret;
921
922 hw_mode = DWC3_GHWPARAMS0_MODE(dwc->hwparams.hwparams0);
923
924
925
926
927
928 dwc3_writel(dwc->regs, DWC3_GUID, LINUX_VERSION_CODE);
929
930
931 if (DWC3_GHWPARAMS3_SSPHY_IFC(dwc->hwparams.hwparams3) ==
932 DWC3_GHWPARAMS3_SSPHY_IFC_DIS) {
933 if (dwc->maximum_speed == USB_SPEED_SUPER)
934 dwc->maximum_speed = USB_SPEED_HIGH;
935 }
936
937 ret = dwc3_phy_setup(dwc);
938 if (ret)
939 goto err0;
940
941 if (!dwc->ulpi_ready) {
942 ret = dwc3_core_ulpi_init(dwc);
943 if (ret)
944 goto err0;
945 dwc->ulpi_ready = true;
946 }
947
948 if (!dwc->phys_ready) {
949 ret = dwc3_core_get_phy(dwc);
950 if (ret)
951 goto err0a;
952 dwc->phys_ready = true;
953 }
954
955 ret = dwc3_core_soft_reset(dwc);
956 if (ret)
957 goto err0a;
958
959 if (hw_mode == DWC3_GHWPARAMS0_MODE_DRD &&
960 dwc->revision > DWC3_REVISION_194A) {
961 if (!dwc->dis_u3_susphy_quirk) {
962 reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
963 reg |= DWC3_GUSB3PIPECTL_SUSPHY;
964 dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
965 }
966
967 if (!dwc->dis_u2_susphy_quirk) {
968 reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
969 reg |= DWC3_GUSB2PHYCFG_SUSPHY;
970 dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
971 }
972 }
973
974 dwc3_core_setup_global_control(dwc);
975 dwc3_core_num_eps(dwc);
976
977 ret = dwc3_setup_scratch_buffers(dwc);
978 if (ret)
979 goto err1;
980
981
982 dwc3_frame_length_adjustment(dwc);
983
984 dwc3_set_incr_burst_type(dwc);
985
986 usb_phy_set_suspend(dwc->usb2_phy, 0);
987 usb_phy_set_suspend(dwc->usb3_phy, 0);
988 ret = phy_power_on(dwc->usb2_generic_phy);
989 if (ret < 0)
990 goto err2;
991
992 ret = phy_power_on(dwc->usb3_generic_phy);
993 if (ret < 0)
994 goto err3;
995
996 ret = dwc3_event_buffers_setup(dwc);
997 if (ret) {
998 dev_err(dwc->dev, "failed to setup event buffers\n");
999 goto err4;
1000 }
1001
1002
1003
1004
1005
1006
1007 if (!dwc3_is_usb31(dwc) && dwc->revision >= DWC3_REVISION_310A) {
1008 reg = dwc3_readl(dwc->regs, DWC3_GUCTL2);
1009 reg |= DWC3_GUCTL2_RST_ACTBITLATER;
1010 dwc3_writel(dwc->regs, DWC3_GUCTL2, reg);
1011 }
1012
1013 if (dwc->revision >= DWC3_REVISION_250A) {
1014 reg = dwc3_readl(dwc->regs, DWC3_GUCTL1);
1015
1016
1017
1018
1019
1020 if (dwc->revision >= DWC3_REVISION_290A)
1021 reg |= DWC3_GUCTL1_DEV_L1_EXIT_BY_HW;
1022
1023 if (dwc->dis_tx_ipgap_linecheck_quirk)
1024 reg |= DWC3_GUCTL1_TX_IPGAP_LINECHECK_DIS;
1025
1026 if (dwc->parkmode_disable_ss_quirk)
1027 reg |= DWC3_GUCTL1_PARKMODE_DISABLE_SS;
1028
1029 dwc3_writel(dwc->regs, DWC3_GUCTL1, reg);
1030 }
1031
1032 if (dwc->dr_mode == USB_DR_MODE_HOST ||
1033 dwc->dr_mode == USB_DR_MODE_OTG) {
1034 reg = dwc3_readl(dwc->regs, DWC3_GUCTL);
1035
1036
1037
1038
1039
1040
1041
1042
1043 reg |= DWC3_GUCTL_HSTINAUTORETRY;
1044
1045 dwc3_writel(dwc->regs, DWC3_GUCTL, reg);
1046 }
1047
1048
1049
1050
1051
1052 if (dwc3_is_usb31(dwc) && dwc->dr_mode == USB_DR_MODE_HOST) {
1053 u8 rx_thr_num = dwc->rx_thr_num_pkt_prd;
1054 u8 rx_maxburst = dwc->rx_max_burst_prd;
1055 u8 tx_thr_num = dwc->tx_thr_num_pkt_prd;
1056 u8 tx_maxburst = dwc->tx_max_burst_prd;
1057
1058 if (rx_thr_num && rx_maxburst) {
1059 reg = dwc3_readl(dwc->regs, DWC3_GRXTHRCFG);
1060 reg |= DWC31_RXTHRNUMPKTSEL_PRD;
1061
1062 reg &= ~DWC31_RXTHRNUMPKT_PRD(~0);
1063 reg |= DWC31_RXTHRNUMPKT_PRD(rx_thr_num);
1064
1065 reg &= ~DWC31_MAXRXBURSTSIZE_PRD(~0);
1066 reg |= DWC31_MAXRXBURSTSIZE_PRD(rx_maxburst);
1067
1068 dwc3_writel(dwc->regs, DWC3_GRXTHRCFG, reg);
1069 }
1070
1071 if (tx_thr_num && tx_maxburst) {
1072 reg = dwc3_readl(dwc->regs, DWC3_GTXTHRCFG);
1073 reg |= DWC31_TXTHRNUMPKTSEL_PRD;
1074
1075 reg &= ~DWC31_TXTHRNUMPKT_PRD(~0);
1076 reg |= DWC31_TXTHRNUMPKT_PRD(tx_thr_num);
1077
1078 reg &= ~DWC31_MAXTXBURSTSIZE_PRD(~0);
1079 reg |= DWC31_MAXTXBURSTSIZE_PRD(tx_maxburst);
1080
1081 dwc3_writel(dwc->regs, DWC3_GTXTHRCFG, reg);
1082 }
1083 }
1084
1085 return 0;
1086
1087err4:
1088 phy_power_off(dwc->usb3_generic_phy);
1089
1090err3:
1091 phy_power_off(dwc->usb2_generic_phy);
1092
1093err2:
1094 usb_phy_set_suspend(dwc->usb2_phy, 1);
1095 usb_phy_set_suspend(dwc->usb3_phy, 1);
1096
1097err1:
1098 usb_phy_shutdown(dwc->usb2_phy);
1099 usb_phy_shutdown(dwc->usb3_phy);
1100 phy_exit(dwc->usb2_generic_phy);
1101 phy_exit(dwc->usb3_generic_phy);
1102
1103err0a:
1104 dwc3_ulpi_exit(dwc);
1105
1106err0:
1107 return ret;
1108}
1109
1110static int dwc3_core_get_phy(struct dwc3 *dwc)
1111{
1112 struct device *dev = dwc->dev;
1113 struct device_node *node = dev->of_node;
1114 int ret;
1115
1116 if (node) {
1117 dwc->usb2_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 0);
1118 dwc->usb3_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 1);
1119 } else {
1120 dwc->usb2_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
1121 dwc->usb3_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB3);
1122 }
1123
1124 if (IS_ERR(dwc->usb2_phy)) {
1125 ret = PTR_ERR(dwc->usb2_phy);
1126 if (ret == -ENXIO || ret == -ENODEV) {
1127 dwc->usb2_phy = NULL;
1128 } else if (ret == -EPROBE_DEFER) {
1129 return ret;
1130 } else {
1131 dev_err(dev, "no usb2 phy configured\n");
1132 return ret;
1133 }
1134 }
1135
1136 if (IS_ERR(dwc->usb3_phy)) {
1137 ret = PTR_ERR(dwc->usb3_phy);
1138 if (ret == -ENXIO || ret == -ENODEV) {
1139 dwc->usb3_phy = NULL;
1140 } else if (ret == -EPROBE_DEFER) {
1141 return ret;
1142 } else {
1143 dev_err(dev, "no usb3 phy configured\n");
1144 return ret;
1145 }
1146 }
1147
1148 dwc->usb2_generic_phy = devm_phy_get(dev, "usb2-phy");
1149 if (IS_ERR(dwc->usb2_generic_phy)) {
1150 ret = PTR_ERR(dwc->usb2_generic_phy);
1151 if (ret == -ENOSYS || ret == -ENODEV) {
1152 dwc->usb2_generic_phy = NULL;
1153 } else if (ret == -EPROBE_DEFER) {
1154 return ret;
1155 } else {
1156 dev_err(dev, "no usb2 phy configured\n");
1157 return ret;
1158 }
1159 }
1160
1161 dwc->usb3_generic_phy = devm_phy_get(dev, "usb3-phy");
1162 if (IS_ERR(dwc->usb3_generic_phy)) {
1163 ret = PTR_ERR(dwc->usb3_generic_phy);
1164 if (ret == -ENOSYS || ret == -ENODEV) {
1165 dwc->usb3_generic_phy = NULL;
1166 } else if (ret == -EPROBE_DEFER) {
1167 return ret;
1168 } else {
1169 dev_err(dev, "no usb3 phy configured\n");
1170 return ret;
1171 }
1172 }
1173
1174 return 0;
1175}
1176
1177static int dwc3_core_init_mode(struct dwc3 *dwc)
1178{
1179 struct device *dev = dwc->dev;
1180 int ret;
1181
1182 switch (dwc->dr_mode) {
1183 case USB_DR_MODE_PERIPHERAL:
1184 dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_DEVICE);
1185
1186 if (dwc->usb2_phy)
1187 otg_set_vbus(dwc->usb2_phy->otg, false);
1188 phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_DEVICE);
1189 phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_DEVICE);
1190
1191 ret = dwc3_gadget_init(dwc);
1192 if (ret) {
1193 if (ret != -EPROBE_DEFER)
1194 dev_err(dev, "failed to initialize gadget\n");
1195 return ret;
1196 }
1197 break;
1198 case USB_DR_MODE_HOST:
1199 dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_HOST);
1200
1201 if (dwc->usb2_phy)
1202 otg_set_vbus(dwc->usb2_phy->otg, true);
1203 phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST);
1204 phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_HOST);
1205
1206 ret = dwc3_host_init(dwc);
1207 if (ret) {
1208 if (ret != -EPROBE_DEFER)
1209 dev_err(dev, "failed to initialize host\n");
1210 return ret;
1211 }
1212 break;
1213 case USB_DR_MODE_OTG:
1214 INIT_WORK(&dwc->drd_work, __dwc3_set_mode);
1215 ret = dwc3_drd_init(dwc);
1216 if (ret) {
1217 if (ret != -EPROBE_DEFER)
1218 dev_err(dev, "failed to initialize dual-role\n");
1219 return ret;
1220 }
1221 break;
1222 default:
1223 dev_err(dev, "Unsupported mode of operation %d\n", dwc->dr_mode);
1224 return -EINVAL;
1225 }
1226
1227 return 0;
1228}
1229
1230static void dwc3_core_exit_mode(struct dwc3 *dwc)
1231{
1232 switch (dwc->dr_mode) {
1233 case USB_DR_MODE_PERIPHERAL:
1234 dwc3_gadget_exit(dwc);
1235 break;
1236 case USB_DR_MODE_HOST:
1237 dwc3_host_exit(dwc);
1238 break;
1239 case USB_DR_MODE_OTG:
1240 dwc3_drd_exit(dwc);
1241 break;
1242 default:
1243
1244 break;
1245 }
1246
1247
1248 dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_DEVICE);
1249}
1250
1251static void dwc3_get_properties(struct dwc3 *dwc)
1252{
1253 struct device *dev = dwc->dev;
1254 u8 lpm_nyet_threshold;
1255 u8 tx_de_emphasis;
1256 u8 hird_threshold;
1257 u8 rx_thr_num_pkt_prd;
1258 u8 rx_max_burst_prd;
1259 u8 tx_thr_num_pkt_prd;
1260 u8 tx_max_burst_prd;
1261
1262
1263 lpm_nyet_threshold = 0xf;
1264
1265
1266 tx_de_emphasis = 1;
1267
1268
1269
1270
1271
1272 hird_threshold = 12;
1273
1274 dwc->maximum_speed = usb_get_maximum_speed(dev);
1275 dwc->dr_mode = usb_get_dr_mode(dev);
1276 dwc->hsphy_mode = of_usb_get_phy_mode(dev->of_node);
1277
1278 dwc->sysdev_is_parent = device_property_read_bool(dev,
1279 "linux,sysdev_is_parent");
1280 if (dwc->sysdev_is_parent)
1281 dwc->sysdev = dwc->dev->parent;
1282 else
1283 dwc->sysdev = dwc->dev;
1284
1285 dwc->has_lpm_erratum = device_property_read_bool(dev,
1286 "snps,has-lpm-erratum");
1287 device_property_read_u8(dev, "snps,lpm-nyet-threshold",
1288 &lpm_nyet_threshold);
1289 dwc->is_utmi_l1_suspend = device_property_read_bool(dev,
1290 "snps,is-utmi-l1-suspend");
1291 device_property_read_u8(dev, "snps,hird-threshold",
1292 &hird_threshold);
1293 dwc->dis_start_transfer_quirk = device_property_read_bool(dev,
1294 "snps,dis-start-transfer-quirk");
1295 dwc->usb3_lpm_capable = device_property_read_bool(dev,
1296 "snps,usb3_lpm_capable");
1297 dwc->usb2_lpm_disable = device_property_read_bool(dev,
1298 "snps,usb2-lpm-disable");
1299 device_property_read_u8(dev, "snps,rx-thr-num-pkt-prd",
1300 &rx_thr_num_pkt_prd);
1301 device_property_read_u8(dev, "snps,rx-max-burst-prd",
1302 &rx_max_burst_prd);
1303 device_property_read_u8(dev, "snps,tx-thr-num-pkt-prd",
1304 &tx_thr_num_pkt_prd);
1305 device_property_read_u8(dev, "snps,tx-max-burst-prd",
1306 &tx_max_burst_prd);
1307
1308 dwc->disable_scramble_quirk = device_property_read_bool(dev,
1309 "snps,disable_scramble_quirk");
1310 dwc->u2exit_lfps_quirk = device_property_read_bool(dev,
1311 "snps,u2exit_lfps_quirk");
1312 dwc->u2ss_inp3_quirk = device_property_read_bool(dev,
1313 "snps,u2ss_inp3_quirk");
1314 dwc->req_p1p2p3_quirk = device_property_read_bool(dev,
1315 "snps,req_p1p2p3_quirk");
1316 dwc->del_p1p2p3_quirk = device_property_read_bool(dev,
1317 "snps,del_p1p2p3_quirk");
1318 dwc->del_phy_power_chg_quirk = device_property_read_bool(dev,
1319 "snps,del_phy_power_chg_quirk");
1320 dwc->lfps_filter_quirk = device_property_read_bool(dev,
1321 "snps,lfps_filter_quirk");
1322 dwc->rx_detect_poll_quirk = device_property_read_bool(dev,
1323 "snps,rx_detect_poll_quirk");
1324 dwc->dis_u3_susphy_quirk = device_property_read_bool(dev,
1325 "snps,dis_u3_susphy_quirk");
1326 dwc->dis_u2_susphy_quirk = device_property_read_bool(dev,
1327 "snps,dis_u2_susphy_quirk");
1328 dwc->dis_enblslpm_quirk = device_property_read_bool(dev,
1329 "snps,dis_enblslpm_quirk");
1330 dwc->dis_u1_entry_quirk = device_property_read_bool(dev,
1331 "snps,dis-u1-entry-quirk");
1332 dwc->dis_u2_entry_quirk = device_property_read_bool(dev,
1333 "snps,dis-u2-entry-quirk");
1334 dwc->dis_rxdet_inp3_quirk = device_property_read_bool(dev,
1335 "snps,dis_rxdet_inp3_quirk");
1336 dwc->dis_u2_freeclk_exists_quirk = device_property_read_bool(dev,
1337 "snps,dis-u2-freeclk-exists-quirk");
1338 dwc->dis_del_phy_power_chg_quirk = device_property_read_bool(dev,
1339 "snps,dis-del-phy-power-chg-quirk");
1340 dwc->dis_tx_ipgap_linecheck_quirk = device_property_read_bool(dev,
1341 "snps,dis-tx-ipgap-linecheck-quirk");
1342 dwc->parkmode_disable_ss_quirk = device_property_read_bool(dev,
1343 "snps,parkmode-disable-ss-quirk");
1344
1345 dwc->tx_de_emphasis_quirk = device_property_read_bool(dev,
1346 "snps,tx_de_emphasis_quirk");
1347 device_property_read_u8(dev, "snps,tx_de_emphasis",
1348 &tx_de_emphasis);
1349 device_property_read_string(dev, "snps,hsphy_interface",
1350 &dwc->hsphy_interface);
1351 device_property_read_u32(dev, "snps,quirk-frame-length-adjustment",
1352 &dwc->fladj);
1353
1354 dwc->dis_metastability_quirk = device_property_read_bool(dev,
1355 "snps,dis_metastability_quirk");
1356
1357 dwc->lpm_nyet_threshold = lpm_nyet_threshold;
1358 dwc->tx_de_emphasis = tx_de_emphasis;
1359
1360 dwc->hird_threshold = hird_threshold;
1361
1362 dwc->rx_thr_num_pkt_prd = rx_thr_num_pkt_prd;
1363 dwc->rx_max_burst_prd = rx_max_burst_prd;
1364
1365 dwc->tx_thr_num_pkt_prd = tx_thr_num_pkt_prd;
1366 dwc->tx_max_burst_prd = tx_max_burst_prd;
1367
1368 dwc->imod_interval = 0;
1369}
1370
1371
1372bool dwc3_has_imod(struct dwc3 *dwc)
1373{
1374 return ((dwc3_is_usb3(dwc) &&
1375 dwc->revision >= DWC3_REVISION_300A) ||
1376 (dwc3_is_usb31(dwc) &&
1377 dwc->revision >= DWC3_USB31_REVISION_120A));
1378}
1379
1380static void dwc3_check_params(struct dwc3 *dwc)
1381{
1382 struct device *dev = dwc->dev;
1383
1384
1385 if (dwc->imod_interval && !dwc3_has_imod(dwc)) {
1386 dev_warn(dwc->dev, "Interrupt moderation not supported\n");
1387 dwc->imod_interval = 0;
1388 }
1389
1390
1391
1392
1393
1394
1395
1396
1397 if (!dwc->imod_interval &&
1398 (dwc->revision == DWC3_REVISION_300A))
1399 dwc->imod_interval = 1;
1400
1401
1402 switch (dwc->maximum_speed) {
1403 case USB_SPEED_LOW:
1404 case USB_SPEED_FULL:
1405 case USB_SPEED_HIGH:
1406 case USB_SPEED_SUPER:
1407 case USB_SPEED_SUPER_PLUS:
1408 break;
1409 default:
1410 dev_err(dev, "invalid maximum_speed parameter %d\n",
1411 dwc->maximum_speed);
1412
1413 case USB_SPEED_UNKNOWN:
1414
1415 dwc->maximum_speed = USB_SPEED_SUPER;
1416
1417
1418
1419
1420 if (dwc3_is_usb31(dwc) &&
1421 (DWC3_GHWPARAMS3_SSPHY_IFC(dwc->hwparams.hwparams3) ==
1422 DWC3_GHWPARAMS3_SSPHY_IFC_GEN2))
1423 dwc->maximum_speed = USB_SPEED_SUPER_PLUS;
1424
1425 break;
1426 }
1427}
1428
1429static int dwc3_probe(struct platform_device *pdev)
1430{
1431 struct device *dev = &pdev->dev;
1432 struct resource *res, dwc_res;
1433 struct dwc3 *dwc;
1434
1435 int ret;
1436
1437 void __iomem *regs;
1438
1439 dwc = devm_kzalloc(dev, sizeof(*dwc), GFP_KERNEL);
1440 if (!dwc)
1441 return -ENOMEM;
1442
1443 dwc->dev = dev;
1444
1445 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1446 if (!res) {
1447 dev_err(dev, "missing memory resource\n");
1448 return -ENODEV;
1449 }
1450
1451 dwc->xhci_resources[0].start = res->start;
1452 dwc->xhci_resources[0].end = dwc->xhci_resources[0].start +
1453 DWC3_XHCI_REGS_END;
1454 dwc->xhci_resources[0].flags = res->flags;
1455 dwc->xhci_resources[0].name = res->name;
1456
1457
1458
1459
1460
1461 dwc_res = *res;
1462 dwc_res.start += DWC3_GLOBALS_REGS_START;
1463
1464 regs = devm_ioremap_resource(dev, &dwc_res);
1465 if (IS_ERR(regs))
1466 return PTR_ERR(regs);
1467
1468 dwc->regs = regs;
1469 dwc->regs_size = resource_size(&dwc_res);
1470
1471 dwc3_get_properties(dwc);
1472
1473 dwc->reset = devm_reset_control_array_get(dev, true, true);
1474 if (IS_ERR(dwc->reset))
1475 return PTR_ERR(dwc->reset);
1476
1477 if (dev->of_node) {
1478 ret = devm_clk_bulk_get_all(dev, &dwc->clks);
1479 if (ret == -EPROBE_DEFER)
1480 return ret;
1481
1482
1483
1484
1485 if (ret < 0)
1486 dwc->num_clks = 0;
1487 else
1488 dwc->num_clks = ret;
1489
1490 }
1491
1492 ret = reset_control_deassert(dwc->reset);
1493 if (ret)
1494 return ret;
1495
1496 ret = clk_bulk_prepare_enable(dwc->num_clks, dwc->clks);
1497 if (ret)
1498 goto assert_reset;
1499
1500 if (!dwc3_core_is_valid(dwc)) {
1501 dev_err(dwc->dev, "this is not a DesignWare USB3 DRD Core\n");
1502 ret = -ENODEV;
1503 goto disable_clks;
1504 }
1505
1506 platform_set_drvdata(pdev, dwc);
1507 dwc3_cache_hwparams(dwc);
1508
1509 spin_lock_init(&dwc->lock);
1510
1511 pm_runtime_set_active(dev);
1512 pm_runtime_use_autosuspend(dev);
1513 pm_runtime_set_autosuspend_delay(dev, DWC3_DEFAULT_AUTOSUSPEND_DELAY);
1514 pm_runtime_enable(dev);
1515 ret = pm_runtime_get_sync(dev);
1516 if (ret < 0)
1517 goto err1;
1518
1519 pm_runtime_forbid(dev);
1520
1521 ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE);
1522 if (ret) {
1523 dev_err(dwc->dev, "failed to allocate event buffers\n");
1524 ret = -ENOMEM;
1525 goto err2;
1526 }
1527
1528 ret = dwc3_get_dr_mode(dwc);
1529 if (ret)
1530 goto err3;
1531
1532 ret = dwc3_alloc_scratch_buffers(dwc);
1533 if (ret)
1534 goto err3;
1535
1536 ret = dwc3_core_init(dwc);
1537 if (ret) {
1538 if (ret != -EPROBE_DEFER)
1539 dev_err(dev, "failed to initialize core: %d\n", ret);
1540 goto err4;
1541 }
1542
1543 dwc3_check_params(dwc);
1544
1545 ret = dwc3_core_init_mode(dwc);
1546 if (ret)
1547 goto err5;
1548
1549 dwc3_debugfs_init(dwc);
1550 pm_runtime_put(dev);
1551
1552 return 0;
1553
1554err5:
1555 dwc3_event_buffers_cleanup(dwc);
1556 dwc3_ulpi_exit(dwc);
1557
1558err4:
1559 dwc3_free_scratch_buffers(dwc);
1560
1561err3:
1562 dwc3_free_event_buffers(dwc);
1563
1564err2:
1565 pm_runtime_allow(&pdev->dev);
1566
1567err1:
1568 pm_runtime_put_sync(&pdev->dev);
1569 pm_runtime_disable(&pdev->dev);
1570
1571disable_clks:
1572 clk_bulk_disable_unprepare(dwc->num_clks, dwc->clks);
1573assert_reset:
1574 reset_control_assert(dwc->reset);
1575
1576 return ret;
1577}
1578
1579static int dwc3_remove(struct platform_device *pdev)
1580{
1581 struct dwc3 *dwc = platform_get_drvdata(pdev);
1582
1583 pm_runtime_get_sync(&pdev->dev);
1584
1585 dwc3_debugfs_exit(dwc);
1586 dwc3_core_exit_mode(dwc);
1587
1588 dwc3_core_exit(dwc);
1589 dwc3_ulpi_exit(dwc);
1590
1591 pm_runtime_put_sync(&pdev->dev);
1592 pm_runtime_allow(&pdev->dev);
1593 pm_runtime_disable(&pdev->dev);
1594
1595 dwc3_free_event_buffers(dwc);
1596 dwc3_free_scratch_buffers(dwc);
1597
1598 return 0;
1599}
1600
1601#ifdef CONFIG_PM
1602static int dwc3_core_init_for_resume(struct dwc3 *dwc)
1603{
1604 int ret;
1605
1606 ret = reset_control_deassert(dwc->reset);
1607 if (ret)
1608 return ret;
1609
1610 ret = clk_bulk_prepare_enable(dwc->num_clks, dwc->clks);
1611 if (ret)
1612 goto assert_reset;
1613
1614 ret = dwc3_core_init(dwc);
1615 if (ret)
1616 goto disable_clks;
1617
1618 return 0;
1619
1620disable_clks:
1621 clk_bulk_disable_unprepare(dwc->num_clks, dwc->clks);
1622assert_reset:
1623 reset_control_assert(dwc->reset);
1624
1625 return ret;
1626}
1627
1628static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg)
1629{
1630 unsigned long flags;
1631 u32 reg;
1632
1633 switch (dwc->current_dr_role) {
1634 case DWC3_GCTL_PRTCAP_DEVICE:
1635 if (pm_runtime_suspended(dwc->dev))
1636 break;
1637 spin_lock_irqsave(&dwc->lock, flags);
1638 dwc3_gadget_suspend(dwc);
1639 spin_unlock_irqrestore(&dwc->lock, flags);
1640 synchronize_irq(dwc->irq_gadget);
1641 dwc3_core_exit(dwc);
1642 break;
1643 case DWC3_GCTL_PRTCAP_HOST:
1644 if (!PMSG_IS_AUTO(msg)) {
1645 dwc3_core_exit(dwc);
1646 break;
1647 }
1648
1649
1650 if (dwc->dis_u2_susphy_quirk ||
1651 dwc->dis_enblslpm_quirk) {
1652 reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
1653 reg |= DWC3_GUSB2PHYCFG_ENBLSLPM |
1654 DWC3_GUSB2PHYCFG_SUSPHY;
1655 dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
1656
1657
1658 usleep_range(5000, 6000);
1659 }
1660
1661 phy_pm_runtime_put_sync(dwc->usb2_generic_phy);
1662 phy_pm_runtime_put_sync(dwc->usb3_generic_phy);
1663 break;
1664 case DWC3_GCTL_PRTCAP_OTG:
1665
1666 if (PMSG_IS_AUTO(msg))
1667 break;
1668
1669 if (dwc->current_otg_role == DWC3_OTG_ROLE_DEVICE) {
1670 spin_lock_irqsave(&dwc->lock, flags);
1671 dwc3_gadget_suspend(dwc);
1672 spin_unlock_irqrestore(&dwc->lock, flags);
1673 synchronize_irq(dwc->irq_gadget);
1674 }
1675
1676 dwc3_otg_exit(dwc);
1677 dwc3_core_exit(dwc);
1678 break;
1679 default:
1680
1681 break;
1682 }
1683
1684 return 0;
1685}
1686
1687static int dwc3_resume_common(struct dwc3 *dwc, pm_message_t msg)
1688{
1689 unsigned long flags;
1690 int ret;
1691 u32 reg;
1692
1693 switch (dwc->current_dr_role) {
1694 case DWC3_GCTL_PRTCAP_DEVICE:
1695 ret = dwc3_core_init_for_resume(dwc);
1696 if (ret)
1697 return ret;
1698
1699 dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_DEVICE);
1700 spin_lock_irqsave(&dwc->lock, flags);
1701 dwc3_gadget_resume(dwc);
1702 spin_unlock_irqrestore(&dwc->lock, flags);
1703 break;
1704 case DWC3_GCTL_PRTCAP_HOST:
1705 if (!PMSG_IS_AUTO(msg)) {
1706 ret = dwc3_core_init_for_resume(dwc);
1707 if (ret)
1708 return ret;
1709 dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_HOST);
1710 break;
1711 }
1712
1713 reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
1714 if (dwc->dis_u2_susphy_quirk)
1715 reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
1716
1717 if (dwc->dis_enblslpm_quirk)
1718 reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM;
1719
1720 dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
1721
1722 phy_pm_runtime_get_sync(dwc->usb2_generic_phy);
1723 phy_pm_runtime_get_sync(dwc->usb3_generic_phy);
1724 break;
1725 case DWC3_GCTL_PRTCAP_OTG:
1726
1727 if (PMSG_IS_AUTO(msg))
1728 break;
1729
1730 ret = dwc3_core_init(dwc);
1731 if (ret)
1732 return ret;
1733
1734 dwc3_set_prtcap(dwc, dwc->current_dr_role);
1735
1736 dwc3_otg_init(dwc);
1737 if (dwc->current_otg_role == DWC3_OTG_ROLE_HOST) {
1738 dwc3_otg_host_init(dwc);
1739 } else if (dwc->current_otg_role == DWC3_OTG_ROLE_DEVICE) {
1740 spin_lock_irqsave(&dwc->lock, flags);
1741 dwc3_gadget_resume(dwc);
1742 spin_unlock_irqrestore(&dwc->lock, flags);
1743 }
1744
1745 break;
1746 default:
1747
1748 break;
1749 }
1750
1751 return 0;
1752}
1753
1754static int dwc3_runtime_checks(struct dwc3 *dwc)
1755{
1756 switch (dwc->current_dr_role) {
1757 case DWC3_GCTL_PRTCAP_DEVICE:
1758 if (dwc->connected)
1759 return -EBUSY;
1760 break;
1761 case DWC3_GCTL_PRTCAP_HOST:
1762 default:
1763
1764 break;
1765 }
1766
1767 return 0;
1768}
1769
1770static int dwc3_runtime_suspend(struct device *dev)
1771{
1772 struct dwc3 *dwc = dev_get_drvdata(dev);
1773 int ret;
1774
1775 if (dwc3_runtime_checks(dwc))
1776 return -EBUSY;
1777
1778 ret = dwc3_suspend_common(dwc, PMSG_AUTO_SUSPEND);
1779 if (ret)
1780 return ret;
1781
1782 device_init_wakeup(dev, true);
1783
1784 return 0;
1785}
1786
1787static int dwc3_runtime_resume(struct device *dev)
1788{
1789 struct dwc3 *dwc = dev_get_drvdata(dev);
1790 int ret;
1791
1792 device_init_wakeup(dev, false);
1793
1794 ret = dwc3_resume_common(dwc, PMSG_AUTO_RESUME);
1795 if (ret)
1796 return ret;
1797
1798 switch (dwc->current_dr_role) {
1799 case DWC3_GCTL_PRTCAP_DEVICE:
1800 dwc3_gadget_process_pending_events(dwc);
1801 break;
1802 case DWC3_GCTL_PRTCAP_HOST:
1803 default:
1804
1805 break;
1806 }
1807
1808 pm_runtime_mark_last_busy(dev);
1809
1810 return 0;
1811}
1812
1813static int dwc3_runtime_idle(struct device *dev)
1814{
1815 struct dwc3 *dwc = dev_get_drvdata(dev);
1816
1817 switch (dwc->current_dr_role) {
1818 case DWC3_GCTL_PRTCAP_DEVICE:
1819 if (dwc3_runtime_checks(dwc))
1820 return -EBUSY;
1821 break;
1822 case DWC3_GCTL_PRTCAP_HOST:
1823 default:
1824
1825 break;
1826 }
1827
1828 pm_runtime_mark_last_busy(dev);
1829 pm_runtime_autosuspend(dev);
1830
1831 return 0;
1832}
1833#endif
1834
1835#ifdef CONFIG_PM_SLEEP
1836static int dwc3_suspend(struct device *dev)
1837{
1838 struct dwc3 *dwc = dev_get_drvdata(dev);
1839 int ret;
1840
1841 ret = dwc3_suspend_common(dwc, PMSG_SUSPEND);
1842 if (ret)
1843 return ret;
1844
1845 pinctrl_pm_select_sleep_state(dev);
1846
1847 return 0;
1848}
1849
1850static int dwc3_resume(struct device *dev)
1851{
1852 struct dwc3 *dwc = dev_get_drvdata(dev);
1853 int ret;
1854
1855 pinctrl_pm_select_default_state(dev);
1856
1857 ret = dwc3_resume_common(dwc, PMSG_RESUME);
1858 if (ret)
1859 return ret;
1860
1861 pm_runtime_disable(dev);
1862 pm_runtime_set_active(dev);
1863 pm_runtime_enable(dev);
1864
1865 return 0;
1866}
1867#endif
1868
1869static const struct dev_pm_ops dwc3_dev_pm_ops = {
1870 SET_SYSTEM_SLEEP_PM_OPS(dwc3_suspend, dwc3_resume)
1871 SET_RUNTIME_PM_OPS(dwc3_runtime_suspend, dwc3_runtime_resume,
1872 dwc3_runtime_idle)
1873};
1874
1875#ifdef CONFIG_OF
1876static const struct of_device_id of_dwc3_match[] = {
1877 {
1878 .compatible = "snps,dwc3"
1879 },
1880 {
1881 .compatible = "synopsys,dwc3"
1882 },
1883 { },
1884};
1885MODULE_DEVICE_TABLE(of, of_dwc3_match);
1886#endif
1887
1888#ifdef CONFIG_ACPI
1889
1890#define ACPI_ID_INTEL_BSW "808622B7"
1891
1892static const struct acpi_device_id dwc3_acpi_match[] = {
1893 { ACPI_ID_INTEL_BSW, 0 },
1894 { },
1895};
1896MODULE_DEVICE_TABLE(acpi, dwc3_acpi_match);
1897#endif
1898
1899static struct platform_driver dwc3_driver = {
1900 .probe = dwc3_probe,
1901 .remove = dwc3_remove,
1902 .driver = {
1903 .name = "dwc3",
1904 .of_match_table = of_match_ptr(of_dwc3_match),
1905 .acpi_match_table = ACPI_PTR(dwc3_acpi_match),
1906 .pm = &dwc3_dev_pm_ops,
1907 },
1908};
1909
1910module_platform_driver(dwc3_driver);
1911
1912MODULE_ALIAS("platform:dwc3");
1913MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
1914MODULE_LICENSE("GPL v2");
1915MODULE_DESCRIPTION("DesignWare USB3 DRD Controller Driver");
1916
