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37#include <linux/module.h>
38#include <linux/pci.h>
39#include <linux/dma-mapping.h>
40#include <linux/kernel.h>
41#include <linux/delay.h>
42#include <linux/ioport.h>
43#include <linux/slab.h>
44#include <linux/errno.h>
45#include <linux/init.h>
46#include <linux/timer.h>
47#include <linux/list.h>
48#include <linux/interrupt.h>
49#include <linux/moduleparam.h>
50#include <linux/device.h>
51#include <linux/usb/ch9.h>
52#include <linux/usb/gadget.h>
53#include <linux/prefetch.h>
54#include <linux/io.h>
55
56#include <asm/byteorder.h>
57#include <asm/irq.h>
58#include <asm/unaligned.h>
59
60#define DRIVER_DESC "PLX NET228x/USB338x USB Peripheral Controller"
61#define DRIVER_VERSION "2005 Sept 27/v3.0"
62
63#define EP_DONTUSE 13
64
65#define USE_RDK_LEDS
66
67
68static const char driver_name[] = "net2280";
69static const char driver_desc[] = DRIVER_DESC;
70
71static const u32 ep_bit[9] = { 0, 17, 2, 19, 4, 1, 18, 3, 20 };
72static const char ep0name[] = "ep0";
73
74#define EP_INFO(_name, _caps) \
75 { \
76 .name = _name, \
77 .caps = _caps, \
78 }
79
80static const struct {
81 const char *name;
82 const struct usb_ep_caps caps;
83} ep_info_dft[] = {
84 EP_INFO(ep0name,
85 USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL, USB_EP_CAPS_DIR_ALL)),
86 EP_INFO("ep-a",
87 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)),
88 EP_INFO("ep-b",
89 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)),
90 EP_INFO("ep-c",
91 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)),
92 EP_INFO("ep-d",
93 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)),
94 EP_INFO("ep-e",
95 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)),
96 EP_INFO("ep-f",
97 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)),
98 EP_INFO("ep-g",
99 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)),
100 EP_INFO("ep-h",
101 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)),
102}, ep_info_adv[] = {
103 EP_INFO(ep0name,
104 USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL, USB_EP_CAPS_DIR_ALL)),
105 EP_INFO("ep1in",
106 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)),
107 EP_INFO("ep2out",
108 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
109 EP_INFO("ep3in",
110 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)),
111 EP_INFO("ep4out",
112 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
113 EP_INFO("ep1out",
114 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
115 EP_INFO("ep2in",
116 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)),
117 EP_INFO("ep3out",
118 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
119 EP_INFO("ep4in",
120 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)),
121};
122
123#undef EP_INFO
124
125
126
127
128
129static ushort fifo_mode;
130
131
132module_param(fifo_mode, ushort, 0644);
133
134
135
136
137
138
139static bool enable_suspend;
140
141
142module_param(enable_suspend, bool, 0444);
143
144#define DIR_STRING(bAddress) (((bAddress) & USB_DIR_IN) ? "in" : "out")
145
146static char *type_string(u8 bmAttributes)
147{
148 switch ((bmAttributes) & USB_ENDPOINT_XFERTYPE_MASK) {
149 case USB_ENDPOINT_XFER_BULK: return "bulk";
150 case USB_ENDPOINT_XFER_ISOC: return "iso";
151 case USB_ENDPOINT_XFER_INT: return "intr";
152 }
153 return "control";
154}
155
156#include "net2280.h"
157
158#define valid_bit cpu_to_le32(BIT(VALID_BIT))
159#define dma_done_ie cpu_to_le32(BIT(DMA_DONE_INTERRUPT_ENABLE))
160
161static void ep_clear_seqnum(struct net2280_ep *ep);
162static void stop_activity(struct net2280 *dev,
163 struct usb_gadget_driver *driver);
164static void ep0_start(struct net2280 *dev);
165
166
167static inline void enable_pciirqenb(struct net2280_ep *ep)
168{
169 u32 tmp = readl(&ep->dev->regs->pciirqenb0);
170
171 if (ep->dev->quirks & PLX_LEGACY)
172 tmp |= BIT(ep->num);
173 else
174 tmp |= BIT(ep_bit[ep->num]);
175 writel(tmp, &ep->dev->regs->pciirqenb0);
176
177 return;
178}
179
180static int
181net2280_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
182{
183 struct net2280 *dev;
184 struct net2280_ep *ep;
185 u32 max;
186 u32 tmp = 0;
187 u32 type;
188 unsigned long flags;
189 static const u32 ep_key[9] = { 1, 0, 1, 0, 1, 1, 0, 1, 0 };
190 int ret = 0;
191
192 ep = container_of(_ep, struct net2280_ep, ep);
193 if (!_ep || !desc || ep->desc || _ep->name == ep0name ||
194 desc->bDescriptorType != USB_DT_ENDPOINT) {
195 pr_err("%s: failed at line=%d\n", __func__, __LINE__);
196 return -EINVAL;
197 }
198 dev = ep->dev;
199 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
200 ret = -ESHUTDOWN;
201 goto print_err;
202 }
203
204
205 if ((desc->bEndpointAddress & 0x0f) == EP_DONTUSE) {
206 ret = -EDOM;
207 goto print_err;
208 }
209
210 if (dev->quirks & PLX_PCIE) {
211 if ((desc->bEndpointAddress & 0x0f) >= 0x0c) {
212 ret = -EDOM;
213 goto print_err;
214 }
215 ep->is_in = !!usb_endpoint_dir_in(desc);
216 if (dev->enhanced_mode && ep->is_in && ep_key[ep->num]) {
217 ret = -EINVAL;
218 goto print_err;
219 }
220 }
221
222
223 max = usb_endpoint_maxp(desc);
224 if (ep->num > 4 && max > 64 && (dev->quirks & PLX_LEGACY)) {
225 ret = -ERANGE;
226 goto print_err;
227 }
228
229 spin_lock_irqsave(&dev->lock, flags);
230 _ep->maxpacket = max;
231 ep->desc = desc;
232
233
234 ep->stopped = 0;
235 ep->wedged = 0;
236 ep->out_overflow = 0;
237
238
239 set_max_speed(ep, max);
240
241
242 writel(BIT(FIFO_FLUSH), &ep->regs->ep_stat);
243
244 if ((dev->quirks & PLX_PCIE) && dev->enhanced_mode) {
245 tmp = readl(&ep->cfg->ep_cfg);
246
247 if ((tmp & 0xf) != usb_endpoint_num(desc)) {
248 ret = -EINVAL;
249 spin_unlock_irqrestore(&dev->lock, flags);
250 goto print_err;
251 }
252 if (ep->is_in)
253 tmp &= ~USB3380_EP_CFG_MASK_IN;
254 else
255 tmp &= ~USB3380_EP_CFG_MASK_OUT;
256 }
257 type = (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK);
258 if (type == USB_ENDPOINT_XFER_INT) {
259
260 if (dev->chiprev == 0100 &&
261 dev->gadget.speed == USB_SPEED_HIGH &&
262 !(desc->bEndpointAddress & USB_DIR_IN))
263 writel(BIT(CLEAR_NAK_OUT_PACKETS_MODE),
264 &ep->regs->ep_rsp);
265 } else if (type == USB_ENDPOINT_XFER_BULK) {
266
267 if ((dev->gadget.speed == USB_SPEED_SUPER && max != 1024) ||
268 (dev->gadget.speed == USB_SPEED_HIGH && max != 512) ||
269 (dev->gadget.speed == USB_SPEED_FULL && max > 64)) {
270 spin_unlock_irqrestore(&dev->lock, flags);
271 ret = -ERANGE;
272 goto print_err;
273 }
274 }
275 ep->is_iso = (type == USB_ENDPOINT_XFER_ISOC);
276
277 if (dev->quirks & PLX_LEGACY) {
278 tmp |= type << ENDPOINT_TYPE;
279 tmp |= desc->bEndpointAddress;
280
281 tmp |= (4 << ENDPOINT_BYTE_COUNT);
282 tmp |= BIT(ENDPOINT_ENABLE);
283 ep->is_in = (tmp & USB_DIR_IN) != 0;
284 } else {
285
286 if (dev->enhanced_mode && ep->is_in) {
287 tmp |= type << IN_ENDPOINT_TYPE;
288 tmp |= BIT(IN_ENDPOINT_ENABLE);
289 } else {
290 tmp |= type << OUT_ENDPOINT_TYPE;
291 tmp |= BIT(OUT_ENDPOINT_ENABLE);
292 tmp |= (ep->is_in << ENDPOINT_DIRECTION);
293 }
294
295 tmp |= (4 << ENDPOINT_BYTE_COUNT);
296 if (!dev->enhanced_mode)
297 tmp |= usb_endpoint_num(desc);
298 tmp |= (ep->ep.maxburst << MAX_BURST_SIZE);
299 }
300
301
302 wmb();
303
304
305 if (!ep->is_in)
306 writel(BIT(SET_NAK_OUT_PACKETS), &ep->regs->ep_rsp);
307 else if (!(dev->quirks & PLX_2280)) {
308
309
310
311 writel(BIT(CLEAR_NAK_OUT_PACKETS) |
312 BIT(CLEAR_NAK_OUT_PACKETS_MODE), &ep->regs->ep_rsp);
313 }
314
315 if (dev->quirks & PLX_PCIE)
316 ep_clear_seqnum(ep);
317 writel(tmp, &ep->cfg->ep_cfg);
318
319
320 if (!ep->dma) {
321 enable_pciirqenb(ep);
322
323 tmp = BIT(DATA_PACKET_RECEIVED_INTERRUPT_ENABLE) |
324 BIT(DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE);
325 if (dev->quirks & PLX_2280)
326 tmp |= readl(&ep->regs->ep_irqenb);
327 writel(tmp, &ep->regs->ep_irqenb);
328 } else {
329 tmp = BIT((8 + ep->num));
330 tmp |= readl(&dev->regs->pciirqenb1);
331 writel(tmp, &dev->regs->pciirqenb1);
332
333
334
335
336
337 if ((desc->bEndpointAddress & USB_DIR_IN) == 0) {
338 tmp = BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT_ENABLE);
339 writel(tmp, &ep->regs->ep_irqenb);
340
341 enable_pciirqenb(ep);
342 }
343 }
344
345 tmp = desc->bEndpointAddress;
346 ep_dbg(dev, "enabled %s (ep%d%s-%s) %s max %04x\n",
347 _ep->name, tmp & 0x0f, DIR_STRING(tmp),
348 type_string(desc->bmAttributes),
349 ep->dma ? "dma" : "pio", max);
350
351
352 spin_unlock_irqrestore(&dev->lock, flags);
353 return ret;
354
355print_err:
356 dev_err(&ep->dev->pdev->dev, "%s: error=%d\n", __func__, ret);
357 return ret;
358}
359
360static int handshake(u32 __iomem *ptr, u32 mask, u32 done, int usec)
361{
362 u32 result;
363
364 do {
365 result = readl(ptr);
366 if (result == ~(u32)0)
367 return -ENODEV;
368 result &= mask;
369 if (result == done)
370 return 0;
371 udelay(1);
372 usec--;
373 } while (usec > 0);
374 return -ETIMEDOUT;
375}
376
377static const struct usb_ep_ops net2280_ep_ops;
378
379static void ep_reset_228x(struct net2280_regs __iomem *regs,
380 struct net2280_ep *ep)
381{
382 u32 tmp;
383
384 ep->desc = NULL;
385 INIT_LIST_HEAD(&ep->queue);
386
387 usb_ep_set_maxpacket_limit(&ep->ep, ~0);
388 ep->ep.ops = &net2280_ep_ops;
389
390
391 if (ep->dma) {
392 writel(0, &ep->dma->dmactl);
393 writel(BIT(DMA_SCATTER_GATHER_DONE_INTERRUPT) |
394 BIT(DMA_TRANSACTION_DONE_INTERRUPT) |
395 BIT(DMA_ABORT),
396 &ep->dma->dmastat);
397
398 tmp = readl(®s->pciirqenb0);
399 tmp &= ~BIT(ep->num);
400 writel(tmp, ®s->pciirqenb0);
401 } else {
402 tmp = readl(®s->pciirqenb1);
403 tmp &= ~BIT((8 + ep->num));
404 writel(tmp, ®s->pciirqenb1);
405 }
406 writel(0, &ep->regs->ep_irqenb);
407
408
409
410
411 if (!ep->is_in || (ep->dev->quirks & PLX_2280)) {
412 tmp = BIT(SET_NAK_OUT_PACKETS_MODE) |
413 BIT(SET_NAK_OUT_PACKETS) |
414 BIT(CLEAR_EP_HIDE_STATUS_PHASE) |
415 BIT(CLEAR_INTERRUPT_MODE);
416 } else {
417
418 tmp = BIT(CLEAR_NAK_OUT_PACKETS_MODE) |
419 BIT(CLEAR_NAK_OUT_PACKETS) |
420 BIT(CLEAR_EP_HIDE_STATUS_PHASE) |
421 BIT(CLEAR_INTERRUPT_MODE);
422 }
423
424 if (ep->num != 0) {
425 tmp |= BIT(CLEAR_ENDPOINT_TOGGLE) |
426 BIT(CLEAR_ENDPOINT_HALT);
427 }
428 writel(tmp, &ep->regs->ep_rsp);
429
430
431 if (ep->dev->quirks & PLX_2280)
432 tmp = BIT(FIFO_OVERFLOW) |
433 BIT(FIFO_UNDERFLOW);
434 else
435 tmp = 0;
436
437 writel(tmp | BIT(TIMEOUT) |
438 BIT(USB_STALL_SENT) |
439 BIT(USB_IN_NAK_SENT) |
440 BIT(USB_IN_ACK_RCVD) |
441 BIT(USB_OUT_PING_NAK_SENT) |
442 BIT(USB_OUT_ACK_SENT) |
443 BIT(FIFO_FLUSH) |
444 BIT(SHORT_PACKET_OUT_DONE_INTERRUPT) |
445 BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT) |
446 BIT(DATA_PACKET_RECEIVED_INTERRUPT) |
447 BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) |
448 BIT(DATA_OUT_PING_TOKEN_INTERRUPT) |
449 BIT(DATA_IN_TOKEN_INTERRUPT),
450 &ep->regs->ep_stat);
451
452
453}
454
455static void ep_reset_338x(struct net2280_regs __iomem *regs,
456 struct net2280_ep *ep)
457{
458 u32 tmp, dmastat;
459
460 ep->desc = NULL;
461 INIT_LIST_HEAD(&ep->queue);
462
463 usb_ep_set_maxpacket_limit(&ep->ep, ~0);
464 ep->ep.ops = &net2280_ep_ops;
465
466
467 if (ep->dma) {
468 writel(0, &ep->dma->dmactl);
469 writel(BIT(DMA_ABORT_DONE_INTERRUPT) |
470 BIT(DMA_PAUSE_DONE_INTERRUPT) |
471 BIT(DMA_SCATTER_GATHER_DONE_INTERRUPT) |
472 BIT(DMA_TRANSACTION_DONE_INTERRUPT),
473
474 &ep->dma->dmastat);
475
476 dmastat = readl(&ep->dma->dmastat);
477 if (dmastat == 0x5002) {
478 ep_warn(ep->dev, "The dmastat return = %x!!\n",
479 dmastat);
480 writel(0x5a, &ep->dma->dmastat);
481 }
482
483 tmp = readl(®s->pciirqenb0);
484 tmp &= ~BIT(ep_bit[ep->num]);
485 writel(tmp, ®s->pciirqenb0);
486 } else {
487 if (ep->num < 5) {
488 tmp = readl(®s->pciirqenb1);
489 tmp &= ~BIT((8 + ep->num));
490 writel(tmp, ®s->pciirqenb1);
491 }
492 }
493 writel(0, &ep->regs->ep_irqenb);
494
495 writel(BIT(SHORT_PACKET_OUT_DONE_INTERRUPT) |
496 BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT) |
497 BIT(FIFO_OVERFLOW) |
498 BIT(DATA_PACKET_RECEIVED_INTERRUPT) |
499 BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) |
500 BIT(DATA_OUT_PING_TOKEN_INTERRUPT) |
501 BIT(DATA_IN_TOKEN_INTERRUPT), &ep->regs->ep_stat);
502
503 tmp = readl(&ep->cfg->ep_cfg);
504 if (ep->is_in)
505 tmp &= ~USB3380_EP_CFG_MASK_IN;
506 else
507 tmp &= ~USB3380_EP_CFG_MASK_OUT;
508 writel(tmp, &ep->cfg->ep_cfg);
509}
510
511static void nuke(struct net2280_ep *);
512
513static int net2280_disable(struct usb_ep *_ep)
514{
515 struct net2280_ep *ep;
516 unsigned long flags;
517
518 ep = container_of(_ep, struct net2280_ep, ep);
519 if (!_ep || _ep->name == ep0name) {
520 pr_err("%s: Invalid ep=%p\n", __func__, _ep);
521 return -EINVAL;
522 }
523 spin_lock_irqsave(&ep->dev->lock, flags);
524 nuke(ep);
525
526 if (ep->dev->quirks & PLX_PCIE)
527 ep_reset_338x(ep->dev->regs, ep);
528 else
529 ep_reset_228x(ep->dev->regs, ep);
530
531 ep_vdbg(ep->dev, "disabled %s %s\n",
532 ep->dma ? "dma" : "pio", _ep->name);
533
534
535 (void)readl(&ep->cfg->ep_cfg);
536
537 if (!ep->dma && ep->num >= 1 && ep->num <= 4)
538 ep->dma = &ep->dev->dma[ep->num - 1];
539
540 spin_unlock_irqrestore(&ep->dev->lock, flags);
541 return 0;
542}
543
544
545
546static struct usb_request
547*net2280_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
548{
549 struct net2280_ep *ep;
550 struct net2280_request *req;
551
552 if (!_ep) {
553 pr_err("%s: Invalid ep\n", __func__);
554 return NULL;
555 }
556 ep = container_of(_ep, struct net2280_ep, ep);
557
558 req = kzalloc(sizeof(*req), gfp_flags);
559 if (!req)
560 return NULL;
561
562 INIT_LIST_HEAD(&req->queue);
563
564
565 if (ep->dma) {
566 struct net2280_dma *td;
567
568 td = dma_pool_alloc(ep->dev->requests, gfp_flags,
569 &req->td_dma);
570 if (!td) {
571 kfree(req);
572 return NULL;
573 }
574 td->dmacount = 0;
575 td->dmadesc = td->dmaaddr;
576 req->td = td;
577 }
578 return &req->req;
579}
580
581static void net2280_free_request(struct usb_ep *_ep, struct usb_request *_req)
582{
583 struct net2280_ep *ep;
584 struct net2280_request *req;
585
586 ep = container_of(_ep, struct net2280_ep, ep);
587 if (!_ep || !_req) {
588 dev_err(&ep->dev->pdev->dev, "%s: Invalid ep=%p or req=%p\n",
589 __func__, _ep, _req);
590 return;
591 }
592
593 req = container_of(_req, struct net2280_request, req);
594 WARN_ON(!list_empty(&req->queue));
595 if (req->td)
596 dma_pool_free(ep->dev->requests, req->td, req->td_dma);
597 kfree(req);
598}
599
600
601
602
603
604
605
606
607
608
609static void write_fifo(struct net2280_ep *ep, struct usb_request *req)
610{
611 struct net2280_ep_regs __iomem *regs = ep->regs;
612 u8 *buf;
613 u32 tmp;
614 unsigned count, total;
615
616
617
618 if (req) {
619 buf = req->buf + req->actual;
620 prefetch(buf);
621 total = req->length - req->actual;
622 } else {
623 total = 0;
624 buf = NULL;
625 }
626
627
628 count = ep->ep.maxpacket;
629 if (count > total)
630 count = total;
631
632 ep_vdbg(ep->dev, "write %s fifo (IN) %d bytes%s req %p\n",
633 ep->ep.name, count,
634 (count != ep->ep.maxpacket) ? " (short)" : "",
635 req);
636 while (count >= 4) {
637
638
639
640
641 tmp = get_unaligned((u32 *)buf);
642 cpu_to_le32s(&tmp);
643 writel(tmp, ®s->ep_data);
644 buf += 4;
645 count -= 4;
646 }
647
648
649
650
651
652 if (count || total < ep->ep.maxpacket) {
653 tmp = count ? get_unaligned((u32 *)buf) : count;
654 cpu_to_le32s(&tmp);
655 set_fifo_bytecount(ep, count & 0x03);
656 writel(tmp, ®s->ep_data);
657 }
658
659
660}
661
662
663
664
665
666
667
668
669static void out_flush(struct net2280_ep *ep)
670{
671 u32 __iomem *statp;
672 u32 tmp;
673
674 statp = &ep->regs->ep_stat;
675
676 tmp = readl(statp);
677 if (tmp & BIT(NAK_OUT_PACKETS)) {
678 ep_dbg(ep->dev, "%s %s %08x !NAK\n",
679 ep->ep.name, __func__, tmp);
680 writel(BIT(SET_NAK_OUT_PACKETS), &ep->regs->ep_rsp);
681 }
682
683 writel(BIT(DATA_OUT_PING_TOKEN_INTERRUPT) |
684 BIT(DATA_PACKET_RECEIVED_INTERRUPT),
685 statp);
686 writel(BIT(FIFO_FLUSH), statp);
687
688 mb();
689 tmp = readl(statp);
690 if (tmp & BIT(DATA_OUT_PING_TOKEN_INTERRUPT) &&
691
692 ep->dev->gadget.speed == USB_SPEED_FULL) {
693 unsigned usec;
694
695 usec = 50;
696 handshake(statp, BIT(USB_OUT_PING_NAK_SENT),
697 BIT(USB_OUT_PING_NAK_SENT), usec);
698
699 }
700}
701
702
703
704
705
706
707
708
709static int read_fifo(struct net2280_ep *ep, struct net2280_request *req)
710{
711 struct net2280_ep_regs __iomem *regs = ep->regs;
712 u8 *buf = req->req.buf + req->req.actual;
713 unsigned count, tmp, is_short;
714 unsigned cleanup = 0, prevent = 0;
715
716
717
718
719 if (ep->dev->chiprev == 0x0100 &&
720 ep->dev->gadget.speed == USB_SPEED_FULL) {
721 udelay(1);
722 tmp = readl(&ep->regs->ep_stat);
723 if ((tmp & BIT(NAK_OUT_PACKETS)))
724 cleanup = 1;
725 else if ((tmp & BIT(FIFO_FULL))) {
726 start_out_naking(ep);
727 prevent = 1;
728 }
729
730 }
731
732
733
734
735 prefetchw(buf);
736 count = readl(®s->ep_avail);
737 if (unlikely(count == 0)) {
738 udelay(1);
739 tmp = readl(&ep->regs->ep_stat);
740 count = readl(®s->ep_avail);
741
742 if (count == 0 && (tmp & BIT(NAK_OUT_PACKETS)) == 0)
743 return 0;
744 }
745
746 tmp = req->req.length - req->req.actual;
747 if (count > tmp) {
748
749 if ((tmp % ep->ep.maxpacket) != 0) {
750 ep_err(ep->dev,
751 "%s out fifo %d bytes, expected %d\n",
752 ep->ep.name, count, tmp);
753 req->req.status = -EOVERFLOW;
754 cleanup = 1;
755
756
757
758 }
759 count = tmp;
760 }
761 req->req.actual += count;
762
763 is_short = (count == 0) || ((count % ep->ep.maxpacket) != 0);
764
765 ep_vdbg(ep->dev, "read %s fifo (OUT) %d bytes%s%s%s req %p %d/%d\n",
766 ep->ep.name, count, is_short ? " (short)" : "",
767 cleanup ? " flush" : "", prevent ? " nak" : "",
768 req, req->req.actual, req->req.length);
769
770 while (count >= 4) {
771 tmp = readl(®s->ep_data);
772 cpu_to_le32s(&tmp);
773 put_unaligned(tmp, (u32 *)buf);
774 buf += 4;
775 count -= 4;
776 }
777 if (count) {
778 tmp = readl(®s->ep_data);
779
780 do {
781 *buf++ = (u8) tmp;
782 tmp >>= 8;
783 } while (--count);
784 }
785 if (cleanup)
786 out_flush(ep);
787 if (prevent) {
788 writel(BIT(CLEAR_NAK_OUT_PACKETS), &ep->regs->ep_rsp);
789 (void) readl(&ep->regs->ep_rsp);
790 }
791
792 return is_short || req->req.actual == req->req.length;
793}
794
795
796static void fill_dma_desc(struct net2280_ep *ep,
797 struct net2280_request *req, int valid)
798{
799 struct net2280_dma *td = req->td;
800 u32 dmacount = req->req.length;
801
802
803
804
805
806
807 if (ep->is_in)
808 dmacount |= BIT(DMA_DIRECTION);
809 if ((!ep->is_in && (dmacount % ep->ep.maxpacket) != 0) ||
810 !(ep->dev->quirks & PLX_2280))
811 dmacount |= BIT(END_OF_CHAIN);
812
813 req->valid = valid;
814 if (valid)
815 dmacount |= BIT(VALID_BIT);
816 dmacount |= BIT(DMA_DONE_INTERRUPT_ENABLE);
817
818
819 td->dmaaddr = cpu_to_le32 (req->req.dma);
820
821
822 wmb();
823 td->dmacount = cpu_to_le32(dmacount);
824}
825
826static const u32 dmactl_default =
827 BIT(DMA_SCATTER_GATHER_DONE_INTERRUPT) |
828 BIT(DMA_CLEAR_COUNT_ENABLE) |
829
830 (POLL_100_USEC << DESCRIPTOR_POLLING_RATE) |
831 BIT(DMA_VALID_BIT_POLLING_ENABLE) |
832 BIT(DMA_VALID_BIT_ENABLE) |
833 BIT(DMA_SCATTER_GATHER_ENABLE) |
834
835 BIT(DMA_ENABLE);
836
837static inline void spin_stop_dma(struct net2280_dma_regs __iomem *dma)
838{
839 handshake(&dma->dmactl, BIT(DMA_ENABLE), 0, 50);
840}
841
842static inline void stop_dma(struct net2280_dma_regs __iomem *dma)
843{
844 writel(readl(&dma->dmactl) & ~BIT(DMA_ENABLE), &dma->dmactl);
845 spin_stop_dma(dma);
846}
847
848static void start_queue(struct net2280_ep *ep, u32 dmactl, u32 td_dma)
849{
850 struct net2280_dma_regs __iomem *dma = ep->dma;
851 unsigned int tmp = BIT(VALID_BIT) | (ep->is_in << DMA_DIRECTION);
852
853 if (!(ep->dev->quirks & PLX_2280))
854 tmp |= BIT(END_OF_CHAIN);
855
856 writel(tmp, &dma->dmacount);
857 writel(readl(&dma->dmastat), &dma->dmastat);
858
859 writel(td_dma, &dma->dmadesc);
860 if (ep->dev->quirks & PLX_PCIE)
861 dmactl |= BIT(DMA_REQUEST_OUTSTANDING);
862 writel(dmactl, &dma->dmactl);
863
864
865 (void) readl(&ep->dev->pci->pcimstctl);
866
867 writel(BIT(DMA_START), &dma->dmastat);
868}
869
870static void start_dma(struct net2280_ep *ep, struct net2280_request *req)
871{
872 u32 tmp;
873 struct net2280_dma_regs __iomem *dma = ep->dma;
874
875
876
877
878 WARN_ON(readl(&dma->dmactl) & BIT(DMA_ENABLE));
879 writel(0, &ep->dma->dmactl);
880
881
882 if (!ep->is_in && (readl(&ep->regs->ep_stat) &
883 BIT(NAK_OUT_PACKETS))) {
884 writel(BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT),
885 &ep->regs->ep_stat);
886
887 tmp = readl(&ep->regs->ep_avail);
888 if (tmp) {
889 writel(readl(&dma->dmastat), &dma->dmastat);
890
891
892 writel(req->req.dma, &dma->dmaaddr);
893 tmp = min(tmp, req->req.length);
894
895
896 req->td->dmacount = cpu_to_le32(req->req.length - tmp);
897 writel(BIT(DMA_DONE_INTERRUPT_ENABLE) | tmp,
898 &dma->dmacount);
899 req->td->dmadesc = 0;
900 req->valid = 1;
901
902 writel(BIT(DMA_ENABLE), &dma->dmactl);
903 writel(BIT(DMA_START), &dma->dmastat);
904 return;
905 }
906 stop_out_naking(ep);
907 }
908
909 tmp = dmactl_default;
910
911
912
913
914
915 if (ep->is_in) {
916 if (likely((req->req.length % ep->ep.maxpacket) ||
917 req->req.zero)){
918 tmp |= BIT(DMA_FIFO_VALIDATE);
919 ep->in_fifo_validate = 1;
920 } else
921 ep->in_fifo_validate = 0;
922 }
923
924
925 req->td->dmadesc = cpu_to_le32 (ep->td_dma);
926 fill_dma_desc(ep, req, 1);
927
928 req->td->dmacount |= cpu_to_le32(BIT(END_OF_CHAIN));
929
930 start_queue(ep, tmp, req->td_dma);
931}
932
933static inline void
934queue_dma(struct net2280_ep *ep, struct net2280_request *req, int valid)
935{
936 struct net2280_dma *end;
937 dma_addr_t tmp;
938
939
940 end = ep->dummy;
941 ep->dummy = req->td;
942 req->td = end;
943
944 tmp = ep->td_dma;
945 ep->td_dma = req->td_dma;
946 req->td_dma = tmp;
947
948 end->dmadesc = cpu_to_le32 (ep->td_dma);
949
950 fill_dma_desc(ep, req, valid);
951}
952
953static void
954done(struct net2280_ep *ep, struct net2280_request *req, int status)
955{
956 struct net2280 *dev;
957 unsigned stopped = ep->stopped;
958
959 list_del_init(&req->queue);
960
961 if (req->req.status == -EINPROGRESS)
962 req->req.status = status;
963 else
964 status = req->req.status;
965
966 dev = ep->dev;
967 if (ep->dma)
968 usb_gadget_unmap_request(&dev->gadget, &req->req, ep->is_in);
969
970 if (status && status != -ESHUTDOWN)
971 ep_vdbg(dev, "complete %s req %p stat %d len %u/%u\n",
972 ep->ep.name, &req->req, status,
973 req->req.actual, req->req.length);
974
975
976 ep->stopped = 1;
977 spin_unlock(&dev->lock);
978 usb_gadget_giveback_request(&ep->ep, &req->req);
979 spin_lock(&dev->lock);
980 ep->stopped = stopped;
981}
982
983
984
985static int
986net2280_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
987{
988 struct net2280_request *req;
989 struct net2280_ep *ep;
990 struct net2280 *dev;
991 unsigned long flags;
992 int ret = 0;
993
994
995
996
997 ep = container_of(_ep, struct net2280_ep, ep);
998 if (!_ep || (!ep->desc && ep->num != 0)) {
999 pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep);
1000 return -EINVAL;
1001 }
1002 req = container_of(_req, struct net2280_request, req);
1003 if (!_req || !_req->complete || !_req->buf ||
1004 !list_empty(&req->queue)) {
1005 ret = -EINVAL;
1006 goto print_err;
1007 }
1008 if (_req->length > (~0 & DMA_BYTE_COUNT_MASK)) {
1009 ret = -EDOM;
1010 goto print_err;
1011 }
1012 dev = ep->dev;
1013 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
1014 ret = -ESHUTDOWN;
1015 goto print_err;
1016 }
1017
1018
1019 if (ep->dma && _req->length == 0) {
1020 ret = -EOPNOTSUPP;
1021 goto print_err;
1022 }
1023
1024
1025 if (ep->dma) {
1026 ret = usb_gadget_map_request(&dev->gadget, _req,
1027 ep->is_in);
1028 if (ret)
1029 goto print_err;
1030 }
1031
1032 ep_vdbg(dev, "%s queue req %p, len %d buf %p\n",
1033 _ep->name, _req, _req->length, _req->buf);
1034
1035 spin_lock_irqsave(&dev->lock, flags);
1036
1037 _req->status = -EINPROGRESS;
1038 _req->actual = 0;
1039
1040
1041 if (list_empty(&ep->queue) && !ep->stopped &&
1042 !((dev->quirks & PLX_PCIE) && ep->dma &&
1043 (readl(&ep->regs->ep_rsp) & BIT(CLEAR_ENDPOINT_HALT)))) {
1044
1045
1046 if (ep->dma)
1047 start_dma(ep, req);
1048 else {
1049
1050 if (ep->num == 0 && _req->length == 0) {
1051 allow_status(ep);
1052 done(ep, req, 0);
1053 ep_vdbg(dev, "%s status ack\n", ep->ep.name);
1054 goto done;
1055 }
1056
1057
1058 if (ep->is_in)
1059 write_fifo(ep, _req);
1060 else {
1061 u32 s;
1062
1063
1064 s = readl(&ep->regs->ep_stat);
1065 if ((s & BIT(FIFO_EMPTY)) == 0) {
1066
1067
1068
1069
1070
1071
1072 if (read_fifo(ep, req) &&
1073 ep->num == 0) {
1074 done(ep, req, 0);
1075 allow_status(ep);
1076
1077 req = NULL;
1078 } else if (read_fifo(ep, req) &&
1079 ep->num != 0) {
1080 done(ep, req, 0);
1081 req = NULL;
1082 } else
1083 s = readl(&ep->regs->ep_stat);
1084 }
1085
1086
1087 if (req && (s & BIT(NAK_OUT_PACKETS)))
1088 writel(BIT(CLEAR_NAK_OUT_PACKETS),
1089 &ep->regs->ep_rsp);
1090 }
1091 }
1092
1093 } else if (ep->dma) {
1094 int valid = 1;
1095
1096 if (ep->is_in) {
1097 int expect;
1098
1099
1100
1101
1102 expect = likely(req->req.zero ||
1103 (req->req.length % ep->ep.maxpacket));
1104 if (expect != ep->in_fifo_validate)
1105 valid = 0;
1106 }
1107 queue_dma(ep, req, valid);
1108
1109 }
1110
1111 ep->responded = 1;
1112 if (req)
1113 list_add_tail(&req->queue, &ep->queue);
1114done:
1115 spin_unlock_irqrestore(&dev->lock, flags);
1116
1117
1118 return ret;
1119
1120print_err:
1121 dev_err(&ep->dev->pdev->dev, "%s: error=%d\n", __func__, ret);
1122 return ret;
1123}
1124
1125static inline void
1126dma_done(struct net2280_ep *ep, struct net2280_request *req, u32 dmacount,
1127 int status)
1128{
1129 req->req.actual = req->req.length - (DMA_BYTE_COUNT_MASK & dmacount);
1130 done(ep, req, status);
1131}
1132
1133static int scan_dma_completions(struct net2280_ep *ep)
1134{
1135 int num_completed = 0;
1136
1137
1138
1139
1140 while (!list_empty(&ep->queue)) {
1141 struct net2280_request *req;
1142 u32 req_dma_count;
1143
1144 req = list_entry(ep->queue.next,
1145 struct net2280_request, queue);
1146 if (!req->valid)
1147 break;
1148 rmb();
1149 req_dma_count = le32_to_cpup(&req->td->dmacount);
1150 if ((req_dma_count & BIT(VALID_BIT)) != 0)
1151 break;
1152
1153
1154
1155
1156
1157 if (unlikely(req->td->dmadesc == 0)) {
1158
1159 u32 const ep_dmacount = readl(&ep->dma->dmacount);
1160
1161 if (ep_dmacount & DMA_BYTE_COUNT_MASK)
1162 break;
1163
1164 dma_done(ep, req, req_dma_count, 0);
1165 num_completed++;
1166 break;
1167 } else if (!ep->is_in &&
1168 (req->req.length % ep->ep.maxpacket) &&
1169 !(ep->dev->quirks & PLX_PCIE)) {
1170
1171 u32 const ep_stat = readl(&ep->regs->ep_stat);
1172
1173
1174
1175
1176 if ((ep_stat & BIT(NAK_OUT_PACKETS)) == 0) {
1177 ep_warn(ep->dev, "%s lost packet sync!\n",
1178 ep->ep.name);
1179 req->req.status = -EOVERFLOW;
1180 } else {
1181 u32 const ep_avail = readl(&ep->regs->ep_avail);
1182 if (ep_avail) {
1183
1184 ep->out_overflow = 1;
1185 ep_dbg(ep->dev,
1186 "%s dma, discard %d len %d\n",
1187 ep->ep.name, ep_avail,
1188 req->req.length);
1189 req->req.status = -EOVERFLOW;
1190 }
1191 }
1192 }
1193 dma_done(ep, req, req_dma_count, 0);
1194 num_completed++;
1195 }
1196
1197 return num_completed;
1198}
1199
1200static void restart_dma(struct net2280_ep *ep)
1201{
1202 struct net2280_request *req;
1203
1204 if (ep->stopped)
1205 return;
1206 req = list_entry(ep->queue.next, struct net2280_request, queue);
1207
1208 start_dma(ep, req);
1209}
1210
1211static void abort_dma(struct net2280_ep *ep)
1212{
1213
1214 if (likely(!list_empty(&ep->queue))) {
1215
1216 writel(BIT(DMA_ABORT), &ep->dma->dmastat);
1217 spin_stop_dma(ep->dma);
1218 } else
1219 stop_dma(ep->dma);
1220 scan_dma_completions(ep);
1221}
1222
1223
1224static void nuke(struct net2280_ep *ep)
1225{
1226 struct net2280_request *req;
1227
1228
1229 ep->stopped = 1;
1230 if (ep->dma)
1231 abort_dma(ep);
1232 while (!list_empty(&ep->queue)) {
1233 req = list_entry(ep->queue.next,
1234 struct net2280_request,
1235 queue);
1236 done(ep, req, -ESHUTDOWN);
1237 }
1238}
1239
1240
1241static int net2280_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1242{
1243 struct net2280_ep *ep;
1244 struct net2280_request *req;
1245 unsigned long flags;
1246 u32 dmactl;
1247 int stopped;
1248
1249 ep = container_of(_ep, struct net2280_ep, ep);
1250 if (!_ep || (!ep->desc && ep->num != 0) || !_req) {
1251 pr_err("%s: Invalid ep=%p or ep->desc or req=%p\n",
1252 __func__, _ep, _req);
1253 return -EINVAL;
1254 }
1255
1256 spin_lock_irqsave(&ep->dev->lock, flags);
1257 stopped = ep->stopped;
1258
1259
1260 dmactl = 0;
1261 ep->stopped = 1;
1262 if (ep->dma) {
1263 dmactl = readl(&ep->dma->dmactl);
1264
1265 stop_dma(ep->dma);
1266 scan_dma_completions(ep);
1267 }
1268
1269
1270 list_for_each_entry(req, &ep->queue, queue) {
1271 if (&req->req == _req)
1272 break;
1273 }
1274 if (&req->req != _req) {
1275 ep->stopped = stopped;
1276 spin_unlock_irqrestore(&ep->dev->lock, flags);
1277 ep_dbg(ep->dev, "%s: Request mismatch\n", __func__);
1278 return -EINVAL;
1279 }
1280
1281
1282 if (ep->queue.next == &req->queue) {
1283 if (ep->dma) {
1284 ep_dbg(ep->dev, "unlink (%s) dma\n", _ep->name);
1285 _req->status = -ECONNRESET;
1286 abort_dma(ep);
1287 if (likely(ep->queue.next == &req->queue)) {
1288
1289 req->td->dmacount = 0;
1290 dma_done(ep, req,
1291 readl(&ep->dma->dmacount),
1292 -ECONNRESET);
1293 }
1294 } else {
1295 ep_dbg(ep->dev, "unlink (%s) pio\n", _ep->name);
1296 done(ep, req, -ECONNRESET);
1297 }
1298 req = NULL;
1299 }
1300
1301 if (req)
1302 done(ep, req, -ECONNRESET);
1303 ep->stopped = stopped;
1304
1305 if (ep->dma) {
1306
1307 if (list_empty(&ep->queue))
1308 stop_dma(ep->dma);
1309 else if (!ep->stopped) {
1310
1311 if (req)
1312 writel(dmactl, &ep->dma->dmactl);
1313 else
1314 start_dma(ep, list_entry(ep->queue.next,
1315 struct net2280_request, queue));
1316 }
1317 }
1318
1319 spin_unlock_irqrestore(&ep->dev->lock, flags);
1320 return 0;
1321}
1322
1323
1324
1325static int net2280_fifo_status(struct usb_ep *_ep);
1326
1327static int
1328net2280_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged)
1329{
1330 struct net2280_ep *ep;
1331 unsigned long flags;
1332 int retval = 0;
1333
1334 ep = container_of(_ep, struct net2280_ep, ep);
1335 if (!_ep || (!ep->desc && ep->num != 0)) {
1336 pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep);
1337 return -EINVAL;
1338 }
1339 if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) {
1340 retval = -ESHUTDOWN;
1341 goto print_err;
1342 }
1343 if (ep->desc && (ep->desc->bmAttributes & 0x03)
1344 == USB_ENDPOINT_XFER_ISOC) {
1345 retval = -EINVAL;
1346 goto print_err;
1347 }
1348
1349 spin_lock_irqsave(&ep->dev->lock, flags);
1350 if (!list_empty(&ep->queue)) {
1351 retval = -EAGAIN;
1352 goto print_unlock;
1353 } else if (ep->is_in && value && net2280_fifo_status(_ep) != 0) {
1354 retval = -EAGAIN;
1355 goto print_unlock;
1356 } else {
1357 ep_vdbg(ep->dev, "%s %s %s\n", _ep->name,
1358 value ? "set" : "clear",
1359 wedged ? "wedge" : "halt");
1360
1361 if (value) {
1362 if (ep->num == 0)
1363 ep->dev->protocol_stall = 1;
1364 else
1365 set_halt(ep);
1366 if (wedged)
1367 ep->wedged = 1;
1368 } else {
1369 clear_halt(ep);
1370 if (ep->dev->quirks & PLX_PCIE &&
1371 !list_empty(&ep->queue) && ep->td_dma)
1372 restart_dma(ep);
1373 ep->wedged = 0;
1374 }
1375 (void) readl(&ep->regs->ep_rsp);
1376 }
1377 spin_unlock_irqrestore(&ep->dev->lock, flags);
1378
1379 return retval;
1380
1381print_unlock:
1382 spin_unlock_irqrestore(&ep->dev->lock, flags);
1383print_err:
1384 dev_err(&ep->dev->pdev->dev, "%s: error=%d\n", __func__, retval);
1385 return retval;
1386}
1387
1388static int net2280_set_halt(struct usb_ep *_ep, int value)
1389{
1390 return net2280_set_halt_and_wedge(_ep, value, 0);
1391}
1392
1393static int net2280_set_wedge(struct usb_ep *_ep)
1394{
1395 if (!_ep || _ep->name == ep0name) {
1396 pr_err("%s: Invalid ep=%p or ep0\n", __func__, _ep);
1397 return -EINVAL;
1398 }
1399 return net2280_set_halt_and_wedge(_ep, 1, 1);
1400}
1401
1402static int net2280_fifo_status(struct usb_ep *_ep)
1403{
1404 struct net2280_ep *ep;
1405 u32 avail;
1406
1407 ep = container_of(_ep, struct net2280_ep, ep);
1408 if (!_ep || (!ep->desc && ep->num != 0)) {
1409 pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep);
1410 return -ENODEV;
1411 }
1412 if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) {
1413 dev_err(&ep->dev->pdev->dev,
1414 "%s: Invalid driver=%p or speed=%d\n",
1415 __func__, ep->dev->driver, ep->dev->gadget.speed);
1416 return -ESHUTDOWN;
1417 }
1418
1419 avail = readl(&ep->regs->ep_avail) & (BIT(12) - 1);
1420 if (avail > ep->fifo_size) {
1421 dev_err(&ep->dev->pdev->dev, "%s: Fifo overflow\n", __func__);
1422 return -EOVERFLOW;
1423 }
1424 if (ep->is_in)
1425 avail = ep->fifo_size - avail;
1426 return avail;
1427}
1428
1429static void net2280_fifo_flush(struct usb_ep *_ep)
1430{
1431 struct net2280_ep *ep;
1432
1433 ep = container_of(_ep, struct net2280_ep, ep);
1434 if (!_ep || (!ep->desc && ep->num != 0)) {
1435 pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep);
1436 return;
1437 }
1438 if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) {
1439 dev_err(&ep->dev->pdev->dev,
1440 "%s: Invalid driver=%p or speed=%d\n",
1441 __func__, ep->dev->driver, ep->dev->gadget.speed);
1442 return;
1443 }
1444
1445 writel(BIT(FIFO_FLUSH), &ep->regs->ep_stat);
1446 (void) readl(&ep->regs->ep_rsp);
1447}
1448
1449static const struct usb_ep_ops net2280_ep_ops = {
1450 .enable = net2280_enable,
1451 .disable = net2280_disable,
1452
1453 .alloc_request = net2280_alloc_request,
1454 .free_request = net2280_free_request,
1455
1456 .queue = net2280_queue,
1457 .dequeue = net2280_dequeue,
1458
1459 .set_halt = net2280_set_halt,
1460 .set_wedge = net2280_set_wedge,
1461 .fifo_status = net2280_fifo_status,
1462 .fifo_flush = net2280_fifo_flush,
1463};
1464
1465
1466
1467static int net2280_get_frame(struct usb_gadget *_gadget)
1468{
1469 struct net2280 *dev;
1470 unsigned long flags;
1471 u16 retval;
1472
1473 if (!_gadget)
1474 return -ENODEV;
1475 dev = container_of(_gadget, struct net2280, gadget);
1476 spin_lock_irqsave(&dev->lock, flags);
1477 retval = get_idx_reg(dev->regs, REG_FRAME) & 0x03ff;
1478 spin_unlock_irqrestore(&dev->lock, flags);
1479 return retval;
1480}
1481
1482static int net2280_wakeup(struct usb_gadget *_gadget)
1483{
1484 struct net2280 *dev;
1485 u32 tmp;
1486 unsigned long flags;
1487
1488 if (!_gadget)
1489 return 0;
1490 dev = container_of(_gadget, struct net2280, gadget);
1491
1492 spin_lock_irqsave(&dev->lock, flags);
1493 tmp = readl(&dev->usb->usbctl);
1494 if (tmp & BIT(DEVICE_REMOTE_WAKEUP_ENABLE))
1495 writel(BIT(GENERATE_RESUME), &dev->usb->usbstat);
1496 spin_unlock_irqrestore(&dev->lock, flags);
1497
1498
1499 return 0;
1500}
1501
1502static int net2280_set_selfpowered(struct usb_gadget *_gadget, int value)
1503{
1504 struct net2280 *dev;
1505 u32 tmp;
1506 unsigned long flags;
1507
1508 if (!_gadget)
1509 return 0;
1510 dev = container_of(_gadget, struct net2280, gadget);
1511
1512 spin_lock_irqsave(&dev->lock, flags);
1513 tmp = readl(&dev->usb->usbctl);
1514 if (value) {
1515 tmp |= BIT(SELF_POWERED_STATUS);
1516 _gadget->is_selfpowered = 1;
1517 } else {
1518 tmp &= ~BIT(SELF_POWERED_STATUS);
1519 _gadget->is_selfpowered = 0;
1520 }
1521 writel(tmp, &dev->usb->usbctl);
1522 spin_unlock_irqrestore(&dev->lock, flags);
1523
1524 return 0;
1525}
1526
1527static int net2280_pullup(struct usb_gadget *_gadget, int is_on)
1528{
1529 struct net2280 *dev;
1530 u32 tmp;
1531 unsigned long flags;
1532
1533 if (!_gadget)
1534 return -ENODEV;
1535 dev = container_of(_gadget, struct net2280, gadget);
1536
1537 spin_lock_irqsave(&dev->lock, flags);
1538 tmp = readl(&dev->usb->usbctl);
1539 dev->softconnect = (is_on != 0);
1540 if (is_on) {
1541 ep0_start(dev);
1542 writel(tmp | BIT(USB_DETECT_ENABLE), &dev->usb->usbctl);
1543 } else {
1544 writel(tmp & ~BIT(USB_DETECT_ENABLE), &dev->usb->usbctl);
1545 stop_activity(dev, NULL);
1546 }
1547
1548 spin_unlock_irqrestore(&dev->lock, flags);
1549
1550 return 0;
1551}
1552
1553static struct usb_ep *net2280_match_ep(struct usb_gadget *_gadget,
1554 struct usb_endpoint_descriptor *desc,
1555 struct usb_ss_ep_comp_descriptor *ep_comp)
1556{
1557 char name[8];
1558 struct usb_ep *ep;
1559
1560 if (usb_endpoint_type(desc) == USB_ENDPOINT_XFER_INT) {
1561
1562 ep = gadget_find_ep_by_name(_gadget, "ep-e");
1563 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp))
1564 return ep;
1565 ep = gadget_find_ep_by_name(_gadget, "ep-f");
1566 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp))
1567 return ep;
1568 }
1569
1570
1571
1572
1573
1574 if (usb_endpoint_type(desc) == USB_ENDPOINT_XFER_INT &&
1575 usb_endpoint_dir_in(desc)) {
1576 ep = gadget_find_ep_by_name(_gadget, "ep2in");
1577 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp))
1578 return ep;
1579 ep = gadget_find_ep_by_name(_gadget, "ep4in");
1580 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp))
1581 return ep;
1582 } else if (usb_endpoint_type(desc) == USB_ENDPOINT_XFER_INT &&
1583 !usb_endpoint_dir_in(desc)) {
1584 ep = gadget_find_ep_by_name(_gadget, "ep1out");
1585 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp))
1586 return ep;
1587 ep = gadget_find_ep_by_name(_gadget, "ep3out");
1588 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp))
1589 return ep;
1590 } else if (usb_endpoint_type(desc) != USB_ENDPOINT_XFER_BULK &&
1591 usb_endpoint_dir_in(desc)) {
1592 ep = gadget_find_ep_by_name(_gadget, "ep1in");
1593 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp))
1594 return ep;
1595 ep = gadget_find_ep_by_name(_gadget, "ep3in");
1596 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp))
1597 return ep;
1598 } else if (usb_endpoint_type(desc) != USB_ENDPOINT_XFER_BULK &&
1599 !usb_endpoint_dir_in(desc)) {
1600 ep = gadget_find_ep_by_name(_gadget, "ep2out");
1601 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp))
1602 return ep;
1603 ep = gadget_find_ep_by_name(_gadget, "ep4out");
1604 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp))
1605 return ep;
1606 }
1607
1608
1609 snprintf(name, sizeof(name), "ep%d%s", usb_endpoint_num(desc),
1610 usb_endpoint_dir_in(desc) ? "in" : "out");
1611 ep = gadget_find_ep_by_name(_gadget, name);
1612 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp))
1613 return ep;
1614
1615 return NULL;
1616}
1617
1618static int net2280_start(struct usb_gadget *_gadget,
1619 struct usb_gadget_driver *driver);
1620static int net2280_stop(struct usb_gadget *_gadget);
1621
1622static const struct usb_gadget_ops net2280_ops = {
1623 .get_frame = net2280_get_frame,
1624 .wakeup = net2280_wakeup,
1625 .set_selfpowered = net2280_set_selfpowered,
1626 .pullup = net2280_pullup,
1627 .udc_start = net2280_start,
1628 .udc_stop = net2280_stop,
1629 .match_ep = net2280_match_ep,
1630};
1631
1632
1633
1634#ifdef CONFIG_USB_GADGET_DEBUG_FILES
1635
1636
1637
1638
1639
1640
1641
1642static ssize_t function_show(struct device *_dev, struct device_attribute *attr,
1643 char *buf)
1644{
1645 struct net2280 *dev = dev_get_drvdata(_dev);
1646
1647 if (!dev->driver || !dev->driver->function ||
1648 strlen(dev->driver->function) > PAGE_SIZE)
1649 return 0;
1650 return scnprintf(buf, PAGE_SIZE, "%s\n", dev->driver->function);
1651}
1652static DEVICE_ATTR_RO(function);
1653
1654static ssize_t registers_show(struct device *_dev,
1655 struct device_attribute *attr, char *buf)
1656{
1657 struct net2280 *dev;
1658 char *next;
1659 unsigned size, t;
1660 unsigned long flags;
1661 int i;
1662 u32 t1, t2;
1663 const char *s;
1664
1665 dev = dev_get_drvdata(_dev);
1666 next = buf;
1667 size = PAGE_SIZE;
1668 spin_lock_irqsave(&dev->lock, flags);
1669
1670 if (dev->driver)
1671 s = dev->driver->driver.name;
1672 else
1673 s = "(none)";
1674
1675
1676 t = scnprintf(next, size, "%s version " DRIVER_VERSION
1677 ", chiprev %04x\n\n"
1678 "devinit %03x fifoctl %08x gadget '%s'\n"
1679 "pci irqenb0 %02x irqenb1 %08x "
1680 "irqstat0 %04x irqstat1 %08x\n",
1681 driver_name, dev->chiprev,
1682 readl(&dev->regs->devinit),
1683 readl(&dev->regs->fifoctl),
1684 s,
1685 readl(&dev->regs->pciirqenb0),
1686 readl(&dev->regs->pciirqenb1),
1687 readl(&dev->regs->irqstat0),
1688 readl(&dev->regs->irqstat1));
1689 size -= t;
1690 next += t;
1691
1692
1693 t1 = readl(&dev->usb->usbctl);
1694 t2 = readl(&dev->usb->usbstat);
1695 if (t1 & BIT(VBUS_PIN)) {
1696 if (t2 & BIT(HIGH_SPEED))
1697 s = "high speed";
1698 else if (dev->gadget.speed == USB_SPEED_UNKNOWN)
1699 s = "powered";
1700 else
1701 s = "full speed";
1702
1703 } else
1704 s = "not attached";
1705 t = scnprintf(next, size,
1706 "stdrsp %08x usbctl %08x usbstat %08x "
1707 "addr 0x%02x (%s)\n",
1708 readl(&dev->usb->stdrsp), t1, t2,
1709 readl(&dev->usb->ouraddr), s);
1710 size -= t;
1711 next += t;
1712
1713
1714
1715
1716
1717
1718 for (i = 0; i < dev->n_ep; i++) {
1719 struct net2280_ep *ep;
1720
1721 ep = &dev->ep[i];
1722 if (i && !ep->desc)
1723 continue;
1724
1725 t1 = readl(&ep->cfg->ep_cfg);
1726 t2 = readl(&ep->regs->ep_rsp) & 0xff;
1727 t = scnprintf(next, size,
1728 "\n%s\tcfg %05x rsp (%02x) %s%s%s%s%s%s%s%s"
1729 "irqenb %02x\n",
1730 ep->ep.name, t1, t2,
1731 (t2 & BIT(CLEAR_NAK_OUT_PACKETS))
1732 ? "NAK " : "",
1733 (t2 & BIT(CLEAR_EP_HIDE_STATUS_PHASE))
1734 ? "hide " : "",
1735 (t2 & BIT(CLEAR_EP_FORCE_CRC_ERROR))
1736 ? "CRC " : "",
1737 (t2 & BIT(CLEAR_INTERRUPT_MODE))
1738 ? "interrupt " : "",
1739 (t2 & BIT(CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE))
1740 ? "status " : "",
1741 (t2 & BIT(CLEAR_NAK_OUT_PACKETS_MODE))
1742 ? "NAKmode " : "",
1743 (t2 & BIT(CLEAR_ENDPOINT_TOGGLE))
1744 ? "DATA1 " : "DATA0 ",
1745 (t2 & BIT(CLEAR_ENDPOINT_HALT))
1746 ? "HALT " : "",
1747 readl(&ep->regs->ep_irqenb));
1748 size -= t;
1749 next += t;
1750
1751 t = scnprintf(next, size,
1752 "\tstat %08x avail %04x "
1753 "(ep%d%s-%s)%s\n",
1754 readl(&ep->regs->ep_stat),
1755 readl(&ep->regs->ep_avail),
1756 t1 & 0x0f, DIR_STRING(t1),
1757 type_string(t1 >> 8),
1758 ep->stopped ? "*" : "");
1759 size -= t;
1760 next += t;
1761
1762 if (!ep->dma)
1763 continue;
1764
1765 t = scnprintf(next, size,
1766 " dma\tctl %08x stat %08x count %08x\n"
1767 "\taddr %08x desc %08x\n",
1768 readl(&ep->dma->dmactl),
1769 readl(&ep->dma->dmastat),
1770 readl(&ep->dma->dmacount),
1771 readl(&ep->dma->dmaaddr),
1772 readl(&ep->dma->dmadesc));
1773 size -= t;
1774 next += t;
1775
1776 }
1777
1778
1779
1780
1781 t = scnprintf(next, size, "\nirqs: ");
1782 size -= t;
1783 next += t;
1784 for (i = 0; i < dev->n_ep; i++) {
1785 struct net2280_ep *ep;
1786
1787 ep = &dev->ep[i];
1788 if (i && !ep->irqs)
1789 continue;
1790 t = scnprintf(next, size, " %s/%lu", ep->ep.name, ep->irqs);
1791 size -= t;
1792 next += t;
1793
1794 }
1795 t = scnprintf(next, size, "\n");
1796 size -= t;
1797 next += t;
1798
1799 spin_unlock_irqrestore(&dev->lock, flags);
1800
1801 return PAGE_SIZE - size;
1802}
1803static DEVICE_ATTR_RO(registers);
1804
1805static ssize_t queues_show(struct device *_dev, struct device_attribute *attr,
1806 char *buf)
1807{
1808 struct net2280 *dev;
1809 char *next;
1810 unsigned size;
1811 unsigned long flags;
1812 int i;
1813
1814 dev = dev_get_drvdata(_dev);
1815 next = buf;
1816 size = PAGE_SIZE;
1817 spin_lock_irqsave(&dev->lock, flags);
1818
1819 for (i = 0; i < dev->n_ep; i++) {
1820 struct net2280_ep *ep = &dev->ep[i];
1821 struct net2280_request *req;
1822 int t;
1823
1824 if (i != 0) {
1825 const struct usb_endpoint_descriptor *d;
1826
1827 d = ep->desc;
1828 if (!d)
1829 continue;
1830 t = d->bEndpointAddress;
1831 t = scnprintf(next, size,
1832 "\n%s (ep%d%s-%s) max %04x %s fifo %d\n",
1833 ep->ep.name, t & USB_ENDPOINT_NUMBER_MASK,
1834 (t & USB_DIR_IN) ? "in" : "out",
1835 type_string(d->bmAttributes),
1836 usb_endpoint_maxp(d),
1837 ep->dma ? "dma" : "pio", ep->fifo_size
1838 );
1839 } else
1840 t = scnprintf(next, size, "ep0 max 64 pio %s\n",
1841 ep->is_in ? "in" : "out");
1842 if (t <= 0 || t > size)
1843 goto done;
1844 size -= t;
1845 next += t;
1846
1847 if (list_empty(&ep->queue)) {
1848 t = scnprintf(next, size, "\t(nothing queued)\n");
1849 if (t <= 0 || t > size)
1850 goto done;
1851 size -= t;
1852 next += t;
1853 continue;
1854 }
1855 list_for_each_entry(req, &ep->queue, queue) {
1856 if (ep->dma && req->td_dma == readl(&ep->dma->dmadesc))
1857 t = scnprintf(next, size,
1858 "\treq %p len %d/%d "
1859 "buf %p (dmacount %08x)\n",
1860 &req->req, req->req.actual,
1861 req->req.length, req->req.buf,
1862 readl(&ep->dma->dmacount));
1863 else
1864 t = scnprintf(next, size,
1865 "\treq %p len %d/%d buf %p\n",
1866 &req->req, req->req.actual,
1867 req->req.length, req->req.buf);
1868 if (t <= 0 || t > size)
1869 goto done;
1870 size -= t;
1871 next += t;
1872
1873 if (ep->dma) {
1874 struct net2280_dma *td;
1875
1876 td = req->td;
1877 t = scnprintf(next, size, "\t td %08x "
1878 " count %08x buf %08x desc %08x\n",
1879 (u32) req->td_dma,
1880 le32_to_cpu(td->dmacount),
1881 le32_to_cpu(td->dmaaddr),
1882 le32_to_cpu(td->dmadesc));
1883 if (t <= 0 || t > size)
1884 goto done;
1885 size -= t;
1886 next += t;
1887 }
1888 }
1889 }
1890
1891done:
1892 spin_unlock_irqrestore(&dev->lock, flags);
1893 return PAGE_SIZE - size;
1894}
1895static DEVICE_ATTR_RO(queues);
1896
1897
1898#else
1899
1900#define device_create_file(a, b) (0)
1901#define device_remove_file(a, b) do { } while (0)
1902
1903#endif
1904
1905
1906
1907
1908
1909
1910
1911static void set_fifo_mode(struct net2280 *dev, int mode)
1912{
1913
1914 writel((0xffff << PCI_BASE2_RANGE) | mode, &dev->regs->fifoctl);
1915
1916
1917 INIT_LIST_HEAD(&dev->gadget.ep_list);
1918 list_add_tail(&dev->ep[1].ep.ep_list, &dev->gadget.ep_list);
1919 list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list);
1920 switch (mode) {
1921 case 0:
1922 list_add_tail(&dev->ep[3].ep.ep_list, &dev->gadget.ep_list);
1923 list_add_tail(&dev->ep[4].ep.ep_list, &dev->gadget.ep_list);
1924 dev->ep[1].fifo_size = dev->ep[2].fifo_size = 1024;
1925 break;
1926 case 1:
1927 dev->ep[1].fifo_size = dev->ep[2].fifo_size = 2048;
1928 break;
1929 case 2:
1930 list_add_tail(&dev->ep[3].ep.ep_list, &dev->gadget.ep_list);
1931 dev->ep[1].fifo_size = 2048;
1932 dev->ep[2].fifo_size = 1024;
1933 break;
1934 }
1935
1936 list_add_tail(&dev->ep[5].ep.ep_list, &dev->gadget.ep_list);
1937 list_add_tail(&dev->ep[6].ep.ep_list, &dev->gadget.ep_list);
1938}
1939
1940static void defect7374_disable_data_eps(struct net2280 *dev)
1941{
1942
1943
1944
1945
1946
1947 struct net2280_ep *ep;
1948 int i;
1949 unsigned char ep_sel;
1950 u32 tmp_reg;
1951
1952 for (i = 1; i < 5; i++) {
1953 ep = &dev->ep[i];
1954 writel(i, &ep->cfg->ep_cfg);
1955 }
1956
1957
1958 for (i = 0; i < 6; i++)
1959 writel(0, &dev->dep[i].dep_cfg);
1960
1961 for (ep_sel = 0; ep_sel <= 21; ep_sel++) {
1962
1963 tmp_reg = readl(&dev->plregs->pl_ep_ctrl);
1964 writel(((tmp_reg & ~0x1f) | ep_sel), &dev->plregs->pl_ep_ctrl);
1965
1966 if (ep_sel < 2 || (ep_sel > 9 && ep_sel < 14) ||
1967 ep_sel == 18 || ep_sel == 20)
1968 continue;
1969
1970
1971 tmp_reg = readl(&dev->plregs->pl_ep_cfg_4);
1972 tmp_reg &= ~BIT(NON_CTRL_IN_TOLERATE_BAD_DIR);
1973 writel(tmp_reg, &dev->plregs->pl_ep_cfg_4);
1974 tmp_reg = readl(&dev->plregs->pl_ep_ctrl);
1975 tmp_reg |= BIT(EP_INITIALIZED);
1976 writel(tmp_reg, &dev->plregs->pl_ep_ctrl);
1977 }
1978}
1979
1980static void defect7374_enable_data_eps_zero(struct net2280 *dev)
1981{
1982 u32 tmp = 0, tmp_reg;
1983 u32 scratch;
1984 int i;
1985 unsigned char ep_sel;
1986
1987 scratch = get_idx_reg(dev->regs, SCRATCH);
1988
1989 WARN_ON((scratch & (0xf << DEFECT7374_FSM_FIELD))
1990 == DEFECT7374_FSM_SS_CONTROL_READ);
1991
1992 scratch &= ~(0xf << DEFECT7374_FSM_FIELD);
1993
1994 ep_warn(dev, "Operate Defect 7374 workaround soft this time");
1995 ep_warn(dev, "It will operate on cold-reboot and SS connect");
1996
1997
1998 tmp = ((0 << ENDPOINT_NUMBER) | BIT(ENDPOINT_DIRECTION) |
1999 (2 << OUT_ENDPOINT_TYPE) | (2 << IN_ENDPOINT_TYPE) |
2000 ((dev->enhanced_mode) ?
2001 BIT(OUT_ENDPOINT_ENABLE) | BIT(IN_ENDPOINT_ENABLE) :
2002 BIT(ENDPOINT_ENABLE)));
2003
2004 for (i = 1; i < 5; i++)
2005 writel(tmp, &dev->ep[i].cfg->ep_cfg);
2006
2007
2008 tmp = ((0 << ENDPOINT_NUMBER) | BIT(ENDPOINT_ENABLE));
2009 writel(tmp, &dev->dep[1].dep_cfg);
2010 writel(tmp, &dev->dep[3].dep_cfg);
2011 writel(tmp, &dev->dep[4].dep_cfg);
2012 writel(tmp, &dev->dep[5].dep_cfg);
2013
2014
2015
2016 for (ep_sel = 0; ep_sel <= 21; ep_sel++) {
2017
2018 tmp_reg = readl(&dev->plregs->pl_ep_ctrl);
2019 writel(((tmp_reg & ~0x1f) | ep_sel),
2020 &dev->plregs->pl_ep_ctrl);
2021
2022 if (ep_sel == 1) {
2023 tmp =
2024 (readl(&dev->plregs->pl_ep_ctrl) |
2025 BIT(CLEAR_ACK_ERROR_CODE) | 0);
2026 writel(tmp, &dev->plregs->pl_ep_ctrl);
2027 continue;
2028 }
2029
2030 if (ep_sel == 0 || (ep_sel > 9 && ep_sel < 14) ||
2031 ep_sel == 18 || ep_sel == 20)
2032 continue;
2033
2034 tmp = (readl(&dev->plregs->pl_ep_cfg_4) |
2035 BIT(NON_CTRL_IN_TOLERATE_BAD_DIR) | 0);
2036 writel(tmp, &dev->plregs->pl_ep_cfg_4);
2037
2038 tmp = readl(&dev->plregs->pl_ep_ctrl) &
2039 ~BIT(EP_INITIALIZED);
2040 writel(tmp, &dev->plregs->pl_ep_ctrl);
2041
2042 }
2043
2044
2045
2046
2047 scratch |= DEFECT7374_FSM_WAITING_FOR_CONTROL_READ;
2048 set_idx_reg(dev->regs, SCRATCH, scratch);
2049
2050}
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061static void usb_reset_228x(struct net2280 *dev)
2062{
2063 u32 tmp;
2064
2065 dev->gadget.speed = USB_SPEED_UNKNOWN;
2066 (void) readl(&dev->usb->usbctl);
2067
2068 net2280_led_init(dev);
2069
2070
2071 writel(0, &dev->usb->stdrsp);
2072 writel(0, &dev->regs->pciirqenb0);
2073 writel(0, &dev->regs->pciirqenb1);
2074
2075
2076 for (tmp = 0; tmp < 4; tmp++) {
2077 struct net2280_ep *ep = &dev->ep[tmp + 1];
2078 if (ep->dma)
2079 abort_dma(ep);
2080 }
2081
2082 writel(~0, &dev->regs->irqstat0),
2083 writel(~(u32)BIT(SUSPEND_REQUEST_INTERRUPT), &dev->regs->irqstat1),
2084
2085
2086 tmp = readl(&dev->regs->devinit) |
2087 BIT(PCI_ENABLE) |
2088 BIT(FIFO_SOFT_RESET) |
2089 BIT(USB_SOFT_RESET) |
2090 BIT(M8051_RESET);
2091 writel(tmp, &dev->regs->devinit);
2092
2093
2094 set_fifo_mode(dev, (fifo_mode <= 2) ? fifo_mode : 0);
2095}
2096
2097static void usb_reset_338x(struct net2280 *dev)
2098{
2099 u32 tmp;
2100
2101 dev->gadget.speed = USB_SPEED_UNKNOWN;
2102 (void)readl(&dev->usb->usbctl);
2103
2104 net2280_led_init(dev);
2105
2106 if (dev->bug7734_patched) {
2107
2108 writel(0, &dev->usb->stdrsp);
2109 writel(0, &dev->regs->pciirqenb0);
2110 writel(0, &dev->regs->pciirqenb1);
2111 }
2112
2113
2114 for (tmp = 0; tmp < 4; tmp++) {
2115 struct net2280_ep *ep = &dev->ep[tmp + 1];
2116 struct net2280_dma_regs __iomem *dma;
2117
2118 if (ep->dma) {
2119 abort_dma(ep);
2120 } else {
2121 dma = &dev->dma[tmp];
2122 writel(BIT(DMA_ABORT), &dma->dmastat);
2123 writel(0, &dma->dmactl);
2124 }
2125 }
2126
2127 writel(~0, &dev->regs->irqstat0), writel(~0, &dev->regs->irqstat1);
2128
2129 if (dev->bug7734_patched) {
2130
2131 tmp = readl(&dev->regs->devinit) |
2132 BIT(PCI_ENABLE) |
2133 BIT(FIFO_SOFT_RESET) |
2134 BIT(USB_SOFT_RESET) |
2135 BIT(M8051_RESET);
2136
2137 writel(tmp, &dev->regs->devinit);
2138 }
2139
2140
2141 INIT_LIST_HEAD(&dev->gadget.ep_list);
2142
2143 for (tmp = 1; tmp < dev->n_ep; tmp++)
2144 list_add_tail(&dev->ep[tmp].ep.ep_list, &dev->gadget.ep_list);
2145
2146}
2147
2148static void usb_reset(struct net2280 *dev)
2149{
2150 if (dev->quirks & PLX_LEGACY)
2151 return usb_reset_228x(dev);
2152 return usb_reset_338x(dev);
2153}
2154
2155static void usb_reinit_228x(struct net2280 *dev)
2156{
2157 u32 tmp;
2158
2159
2160 for (tmp = 0; tmp < 7; tmp++) {
2161 struct net2280_ep *ep = &dev->ep[tmp];
2162
2163 ep->ep.name = ep_info_dft[tmp].name;
2164 ep->ep.caps = ep_info_dft[tmp].caps;
2165 ep->dev = dev;
2166 ep->num = tmp;
2167
2168 if (tmp > 0 && tmp <= 4) {
2169 ep->fifo_size = 1024;
2170 ep->dma = &dev->dma[tmp - 1];
2171 } else
2172 ep->fifo_size = 64;
2173 ep->regs = &dev->epregs[tmp];
2174 ep->cfg = &dev->epregs[tmp];
2175 ep_reset_228x(dev->regs, ep);
2176 }
2177 usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 64);
2178 usb_ep_set_maxpacket_limit(&dev->ep[5].ep, 64);
2179 usb_ep_set_maxpacket_limit(&dev->ep[6].ep, 64);
2180
2181 dev->gadget.ep0 = &dev->ep[0].ep;
2182 dev->ep[0].stopped = 0;
2183 INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
2184
2185
2186
2187
2188 for (tmp = 0; tmp < 5; tmp++)
2189 writel(EP_DONTUSE, &dev->dep[tmp].dep_cfg);
2190}
2191
2192static void usb_reinit_338x(struct net2280 *dev)
2193{
2194 int i;
2195 u32 tmp, val;
2196 static const u32 ne[9] = { 0, 1, 2, 3, 4, 1, 2, 3, 4 };
2197 static const u32 ep_reg_addr[9] = { 0x00, 0xC0, 0x00, 0xC0, 0x00,
2198 0x00, 0xC0, 0x00, 0xC0 };
2199
2200
2201 for (i = 0; i < dev->n_ep; i++) {
2202 struct net2280_ep *ep = &dev->ep[i];
2203
2204 ep->ep.name = dev->enhanced_mode ? ep_info_adv[i].name :
2205 ep_info_dft[i].name;
2206 ep->ep.caps = dev->enhanced_mode ? ep_info_adv[i].caps :
2207 ep_info_dft[i].caps;
2208 ep->dev = dev;
2209 ep->num = i;
2210
2211 if (i > 0 && i <= 4)
2212 ep->dma = &dev->dma[i - 1];
2213
2214 if (dev->enhanced_mode) {
2215 ep->cfg = &dev->epregs[ne[i]];
2216
2217
2218
2219
2220 if (i > 0 && i < 5)
2221 writel(ne[i], &ep->cfg->ep_cfg);
2222 ep->regs = (struct net2280_ep_regs __iomem *)
2223 (((void __iomem *)&dev->epregs[ne[i]]) +
2224 ep_reg_addr[i]);
2225 } else {
2226 ep->cfg = &dev->epregs[i];
2227 ep->regs = &dev->epregs[i];
2228 }
2229
2230 ep->fifo_size = (i != 0) ? 2048 : 512;
2231
2232 ep_reset_338x(dev->regs, ep);
2233 }
2234 usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 512);
2235
2236 dev->gadget.ep0 = &dev->ep[0].ep;
2237 dev->ep[0].stopped = 0;
2238
2239
2240 if (dev->bug7734_patched) {
2241 tmp = readl(&dev->usb_ext->usbctl2) &
2242 ~(BIT(U1_ENABLE) | BIT(U2_ENABLE) | BIT(LTM_ENABLE));
2243 writel(tmp, &dev->usb_ext->usbctl2);
2244 }
2245
2246
2247 val = readl(&dev->ll_lfps_regs->ll_lfps_5);
2248 val &= ~(0xf << TIMER_LFPS_6US);
2249 val |= 0x5 << TIMER_LFPS_6US;
2250 writel(val, &dev->ll_lfps_regs->ll_lfps_5);
2251
2252 val = readl(&dev->ll_lfps_regs->ll_lfps_6);
2253 val &= ~(0xffff << TIMER_LFPS_80US);
2254 val |= 0x0100 << TIMER_LFPS_80US;
2255 writel(val, &dev->ll_lfps_regs->ll_lfps_6);
2256
2257
2258
2259
2260
2261
2262 val = readl(&dev->ll_tsn_regs->ll_tsn_counters_2);
2263 val &= ~(0x1f << HOT_TX_NORESET_TS2);
2264 val |= 0x10 << HOT_TX_NORESET_TS2;
2265 writel(val, &dev->ll_tsn_regs->ll_tsn_counters_2);
2266
2267 val = readl(&dev->ll_tsn_regs->ll_tsn_counters_3);
2268 val &= ~(0x1f << HOT_RX_RESET_TS2);
2269 val |= 0x3 << HOT_RX_RESET_TS2;
2270 writel(val, &dev->ll_tsn_regs->ll_tsn_counters_3);
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280 val = readl(&dev->ll_chicken_reg->ll_tsn_chicken_bit);
2281 val |= BIT(RECOVERY_IDLE_TO_RECOVER_FMW);
2282 writel(val, &dev->ll_chicken_reg->ll_tsn_chicken_bit);
2283
2284 INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
2285
2286
2287 writel(0x0D, &dev->dep[0].dep_cfg);
2288 writel(0x0D, &dev->dep[1].dep_cfg);
2289 writel(0x0E, &dev->dep[2].dep_cfg);
2290 writel(0x0E, &dev->dep[3].dep_cfg);
2291 writel(0x0F, &dev->dep[4].dep_cfg);
2292 writel(0x0C, &dev->dep[5].dep_cfg);
2293}
2294
2295static void usb_reinit(struct net2280 *dev)
2296{
2297 if (dev->quirks & PLX_LEGACY)
2298 return usb_reinit_228x(dev);
2299 return usb_reinit_338x(dev);
2300}
2301
2302static void ep0_start_228x(struct net2280 *dev)
2303{
2304 writel(BIT(CLEAR_EP_HIDE_STATUS_PHASE) |
2305 BIT(CLEAR_NAK_OUT_PACKETS) |
2306 BIT(CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE),
2307 &dev->epregs[0].ep_rsp);
2308
2309
2310
2311
2312
2313
2314
2315 writel(BIT(SET_TEST_MODE) |
2316 BIT(SET_ADDRESS) |
2317 BIT(DEVICE_SET_CLEAR_DEVICE_REMOTE_WAKEUP) |
2318 BIT(GET_DEVICE_STATUS) |
2319 BIT(GET_INTERFACE_STATUS),
2320 &dev->usb->stdrsp);
2321 writel(BIT(USB_ROOT_PORT_WAKEUP_ENABLE) |
2322 BIT(SELF_POWERED_USB_DEVICE) |
2323 BIT(REMOTE_WAKEUP_SUPPORT) |
2324 (dev->softconnect << USB_DETECT_ENABLE) |
2325 BIT(SELF_POWERED_STATUS),
2326 &dev->usb->usbctl);
2327
2328
2329 writel(BIT(SETUP_PACKET_INTERRUPT_ENABLE) |
2330 BIT(ENDPOINT_0_INTERRUPT_ENABLE),
2331 &dev->regs->pciirqenb0);
2332 writel(BIT(PCI_INTERRUPT_ENABLE) |
2333 BIT(PCI_MASTER_ABORT_RECEIVED_INTERRUPT_ENABLE) |
2334 BIT(PCI_TARGET_ABORT_RECEIVED_INTERRUPT_ENABLE) |
2335 BIT(PCI_RETRY_ABORT_INTERRUPT_ENABLE) |
2336 BIT(VBUS_INTERRUPT_ENABLE) |
2337 BIT(ROOT_PORT_RESET_INTERRUPT_ENABLE) |
2338 BIT(SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE),
2339 &dev->regs->pciirqenb1);
2340
2341
2342 (void) readl(&dev->usb->usbctl);
2343}
2344
2345static void ep0_start_338x(struct net2280 *dev)
2346{
2347
2348 if (dev->bug7734_patched)
2349 writel(BIT(CLEAR_NAK_OUT_PACKETS_MODE) |
2350 BIT(SET_EP_HIDE_STATUS_PHASE),
2351 &dev->epregs[0].ep_rsp);
2352
2353
2354
2355
2356
2357
2358
2359 writel(BIT(SET_ISOCHRONOUS_DELAY) |
2360 BIT(SET_SEL) |
2361 BIT(SET_TEST_MODE) |
2362 BIT(SET_ADDRESS) |
2363 BIT(GET_INTERFACE_STATUS) |
2364 BIT(GET_DEVICE_STATUS),
2365 &dev->usb->stdrsp);
2366 dev->wakeup_enable = 1;
2367 writel(BIT(USB_ROOT_PORT_WAKEUP_ENABLE) |
2368 (dev->softconnect << USB_DETECT_ENABLE) |
2369 BIT(DEVICE_REMOTE_WAKEUP_ENABLE),
2370 &dev->usb->usbctl);
2371
2372
2373 writel(BIT(SETUP_PACKET_INTERRUPT_ENABLE) |
2374 BIT(ENDPOINT_0_INTERRUPT_ENABLE),
2375 &dev->regs->pciirqenb0);
2376 writel(BIT(PCI_INTERRUPT_ENABLE) |
2377 BIT(ROOT_PORT_RESET_INTERRUPT_ENABLE) |
2378 BIT(SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE) |
2379 BIT(VBUS_INTERRUPT_ENABLE),
2380 &dev->regs->pciirqenb1);
2381
2382
2383 (void)readl(&dev->usb->usbctl);
2384}
2385
2386static void ep0_start(struct net2280 *dev)
2387{
2388 if (dev->quirks & PLX_LEGACY)
2389 return ep0_start_228x(dev);
2390 return ep0_start_338x(dev);
2391}
2392
2393
2394
2395
2396
2397
2398
2399static int net2280_start(struct usb_gadget *_gadget,
2400 struct usb_gadget_driver *driver)
2401{
2402 struct net2280 *dev;
2403 int retval;
2404 unsigned i;
2405
2406
2407
2408
2409
2410 if (!driver || driver->max_speed < USB_SPEED_HIGH ||
2411 !driver->setup)
2412 return -EINVAL;
2413
2414 dev = container_of(_gadget, struct net2280, gadget);
2415
2416 for (i = 0; i < dev->n_ep; i++)
2417 dev->ep[i].irqs = 0;
2418
2419
2420 driver->driver.bus = NULL;
2421 dev->driver = driver;
2422
2423 retval = device_create_file(&dev->pdev->dev, &dev_attr_function);
2424 if (retval)
2425 goto err_unbind;
2426 retval = device_create_file(&dev->pdev->dev, &dev_attr_queues);
2427 if (retval)
2428 goto err_func;
2429
2430
2431
2432
2433 net2280_led_active(dev, 1);
2434
2435 if ((dev->quirks & PLX_PCIE) && !dev->bug7734_patched)
2436 defect7374_enable_data_eps_zero(dev);
2437
2438 ep0_start(dev);
2439
2440
2441 return 0;
2442
2443err_func:
2444 device_remove_file(&dev->pdev->dev, &dev_attr_function);
2445err_unbind:
2446 dev->driver = NULL;
2447 return retval;
2448}
2449
2450static void stop_activity(struct net2280 *dev, struct usb_gadget_driver *driver)
2451{
2452 int i;
2453
2454
2455 if (dev->gadget.speed == USB_SPEED_UNKNOWN)
2456 driver = NULL;
2457
2458
2459
2460
2461 usb_reset(dev);
2462 for (i = 0; i < dev->n_ep; i++)
2463 nuke(&dev->ep[i]);
2464
2465
2466 if (driver) {
2467 spin_unlock(&dev->lock);
2468 driver->disconnect(&dev->gadget);
2469 spin_lock(&dev->lock);
2470 }
2471
2472 usb_reinit(dev);
2473}
2474
2475static int net2280_stop(struct usb_gadget *_gadget)
2476{
2477 struct net2280 *dev;
2478 unsigned long flags;
2479
2480 dev = container_of(_gadget, struct net2280, gadget);
2481
2482 spin_lock_irqsave(&dev->lock, flags);
2483 stop_activity(dev, NULL);
2484 spin_unlock_irqrestore(&dev->lock, flags);
2485
2486 net2280_led_active(dev, 0);
2487
2488 device_remove_file(&dev->pdev->dev, &dev_attr_function);
2489 device_remove_file(&dev->pdev->dev, &dev_attr_queues);
2490
2491 dev->driver = NULL;
2492
2493 return 0;
2494}
2495
2496
2497
2498
2499
2500
2501
2502static void handle_ep_small(struct net2280_ep *ep)
2503{
2504 struct net2280_request *req;
2505 u32 t;
2506
2507 int mode = 1;
2508
2509 if (!list_empty(&ep->queue))
2510 req = list_entry(ep->queue.next,
2511 struct net2280_request, queue);
2512 else
2513 req = NULL;
2514
2515
2516 t = readl(&ep->regs->ep_stat);
2517 ep->irqs++;
2518
2519 ep_vdbg(ep->dev, "%s ack ep_stat %08x, req %p\n",
2520 ep->ep.name, t, req ? &req->req : NULL);
2521
2522 if (!ep->is_in || (ep->dev->quirks & PLX_2280))
2523 writel(t & ~BIT(NAK_OUT_PACKETS), &ep->regs->ep_stat);
2524 else
2525
2526 writel(t, &ep->regs->ep_stat);
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538 if (unlikely(ep->num == 0)) {
2539 if (ep->is_in) {
2540
2541 if (t & BIT(DATA_OUT_PING_TOKEN_INTERRUPT)) {
2542 if (ep->dev->protocol_stall) {
2543 ep->stopped = 1;
2544 set_halt(ep);
2545 }
2546 if (!req)
2547 allow_status(ep);
2548 mode = 2;
2549
2550 } else if (t & BIT(DATA_IN_TOKEN_INTERRUPT)) {
2551 if (ep->dev->protocol_stall) {
2552 ep->stopped = 1;
2553 set_halt(ep);
2554 mode = 2;
2555 } else if (ep->responded &&
2556 !req && !ep->stopped)
2557 write_fifo(ep, NULL);
2558 }
2559 } else {
2560
2561 if (t & BIT(DATA_IN_TOKEN_INTERRUPT)) {
2562 if (ep->dev->protocol_stall) {
2563 ep->stopped = 1;
2564 set_halt(ep);
2565 }
2566 mode = 2;
2567
2568 } else if (((t & BIT(DATA_OUT_PING_TOKEN_INTERRUPT)) &&
2569 req &&
2570 req->req.actual == req->req.length) ||
2571 (ep->responded && !req)) {
2572 ep->dev->protocol_stall = 1;
2573 set_halt(ep);
2574 ep->stopped = 1;
2575 if (req)
2576 done(ep, req, -EOVERFLOW);
2577 req = NULL;
2578 }
2579 }
2580 }
2581
2582 if (unlikely(!req))
2583 return;
2584
2585
2586 if (likely(ep->dma)) {
2587 if (t & BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT)) {
2588 struct net2280_request *stuck_req = NULL;
2589 int stopped = ep->stopped;
2590 int num_completed;
2591 int stuck = 0;
2592 u32 count;
2593
2594
2595
2596
2597
2598 ep->stopped = 1;
2599 for (count = 0; ; t = readl(&ep->regs->ep_stat)) {
2600
2601
2602
2603
2604 num_completed = scan_dma_completions(ep);
2605 if (unlikely(list_empty(&ep->queue) ||
2606 ep->out_overflow)) {
2607 req = NULL;
2608 break;
2609 }
2610 req = list_entry(ep->queue.next,
2611 struct net2280_request, queue);
2612
2613
2614
2615
2616 if (likely(t & BIT(FIFO_EMPTY))) {
2617 count = readl(&ep->dma->dmacount);
2618 count &= DMA_BYTE_COUNT_MASK;
2619 if (readl(&ep->dma->dmadesc)
2620 != req->td_dma)
2621 req = NULL;
2622 break;
2623 }
2624
2625
2626
2627
2628 if (num_completed == 0) {
2629 if (stuck_req == req &&
2630 readl(&ep->dma->dmadesc) !=
2631 req->td_dma && stuck++ > 5) {
2632 count = readl(
2633 &ep->dma->dmacount);
2634 count &= DMA_BYTE_COUNT_MASK;
2635 req = NULL;
2636 ep_dbg(ep->dev, "%s escape stuck %d, count %u\n",
2637 ep->ep.name, stuck,
2638 count);
2639 break;
2640 } else if (stuck_req != req) {
2641 stuck_req = req;
2642 stuck = 0;
2643 }
2644 } else {
2645 stuck_req = NULL;
2646 stuck = 0;
2647 }
2648
2649 udelay(1);
2650 }
2651
2652
2653 writel(BIT(DMA_ABORT), &ep->dma->dmastat);
2654 spin_stop_dma(ep->dma);
2655
2656 if (likely(req)) {
2657 req->td->dmacount = 0;
2658 t = readl(&ep->regs->ep_avail);
2659 dma_done(ep, req, count,
2660 (ep->out_overflow || t)
2661 ? -EOVERFLOW : 0);
2662 }
2663
2664
2665 if (unlikely(ep->out_overflow ||
2666 (ep->dev->chiprev == 0x0100 &&
2667 ep->dev->gadget.speed
2668 == USB_SPEED_FULL))) {
2669 out_flush(ep);
2670 ep->out_overflow = 0;
2671 }
2672
2673
2674 ep->stopped = stopped;
2675 if (!list_empty(&ep->queue))
2676 restart_dma(ep);
2677 } else
2678 ep_dbg(ep->dev, "%s dma ep_stat %08x ??\n",
2679 ep->ep.name, t);
2680 return;
2681
2682
2683 } else if (t & BIT(DATA_PACKET_RECEIVED_INTERRUPT)) {
2684 if (read_fifo(ep, req) && ep->num != 0)
2685 mode = 2;
2686
2687
2688 } else if (t & BIT(DATA_PACKET_TRANSMITTED_INTERRUPT)) {
2689 unsigned len;
2690
2691 len = req->req.length - req->req.actual;
2692 if (len > ep->ep.maxpacket)
2693 len = ep->ep.maxpacket;
2694 req->req.actual += len;
2695
2696
2697
2698 if ((req->req.actual == req->req.length) &&
2699 (!req->req.zero || len != ep->ep.maxpacket) && ep->num)
2700 mode = 2;
2701
2702
2703 } else if (mode == 1)
2704 return;
2705
2706
2707 if (mode == 2) {
2708
2709 done(ep, req, 0);
2710
2711
2712 if (ep->num == 0) {
2713
2714
2715
2716
2717 if (!ep->stopped)
2718 allow_status(ep);
2719 req = NULL;
2720 } else {
2721 if (!list_empty(&ep->queue) && !ep->stopped)
2722 req = list_entry(ep->queue.next,
2723 struct net2280_request, queue);
2724 else
2725 req = NULL;
2726 if (req && !ep->is_in)
2727 stop_out_naking(ep);
2728 }
2729 }
2730
2731
2732
2733
2734 if (req && !ep->stopped) {
2735
2736
2737 if (t & BIT(DATA_PACKET_TRANSMITTED_INTERRUPT))
2738 write_fifo(ep, &req->req);
2739 }
2740}
2741
2742static struct net2280_ep *get_ep_by_addr(struct net2280 *dev, u16 wIndex)
2743{
2744 struct net2280_ep *ep;
2745
2746 if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0)
2747 return &dev->ep[0];
2748 list_for_each_entry(ep, &dev->gadget.ep_list, ep.ep_list) {
2749 u8 bEndpointAddress;
2750
2751 if (!ep->desc)
2752 continue;
2753 bEndpointAddress = ep->desc->bEndpointAddress;
2754 if ((wIndex ^ bEndpointAddress) & USB_DIR_IN)
2755 continue;
2756 if ((wIndex & 0x0f) == (bEndpointAddress & 0x0f))
2757 return ep;
2758 }
2759 return NULL;
2760}
2761
2762static void defect7374_workaround(struct net2280 *dev, struct usb_ctrlrequest r)
2763{
2764 u32 scratch, fsmvalue;
2765 u32 ack_wait_timeout, state;
2766
2767
2768 scratch = get_idx_reg(dev->regs, SCRATCH);
2769 fsmvalue = scratch & (0xf << DEFECT7374_FSM_FIELD);
2770 scratch &= ~(0xf << DEFECT7374_FSM_FIELD);
2771
2772 if (!((fsmvalue == DEFECT7374_FSM_WAITING_FOR_CONTROL_READ) &&
2773 (r.bRequestType & USB_DIR_IN)))
2774 return;
2775
2776
2777 if (!(readl(&dev->usb->usbstat) & BIT(SUPER_SPEED_MODE))) {
2778
2779
2780
2781
2782
2783
2784 scratch |= DEFECT7374_FSM_NON_SS_CONTROL_READ;
2785 dev->bug7734_patched = 1;
2786 goto restore_data_eps;
2787 }
2788
2789
2790 for (ack_wait_timeout = 0;
2791 ack_wait_timeout < DEFECT_7374_NUMBEROF_MAX_WAIT_LOOPS;
2792 ack_wait_timeout++) {
2793
2794 state = readl(&dev->plregs->pl_ep_status_1)
2795 & (0xff << STATE);
2796 if ((state >= (ACK_GOOD_NORMAL << STATE)) &&
2797 (state <= (ACK_GOOD_MORE_ACKS_TO_COME << STATE))) {
2798 scratch |= DEFECT7374_FSM_SS_CONTROL_READ;
2799 dev->bug7734_patched = 1;
2800 break;
2801 }
2802
2803
2804
2805
2806
2807 udelay(DEFECT_7374_PROCESSOR_WAIT_TIME);
2808
2809 continue;
2810 }
2811
2812
2813 if (ack_wait_timeout >= DEFECT_7374_NUMBEROF_MAX_WAIT_LOOPS) {
2814 ep_err(dev, "FAIL: Defect 7374 workaround waited but failed "
2815 "to detect SS host's data phase ACK.");
2816 ep_err(dev, "PL_EP_STATUS_1(23:16):.Expected from 0x11 to 0x16"
2817 "got 0x%2.2x.\n", state >> STATE);
2818 } else {
2819 ep_warn(dev, "INFO: Defect 7374 workaround waited about\n"
2820 "%duSec for Control Read Data Phase ACK\n",
2821 DEFECT_7374_PROCESSOR_WAIT_TIME * ack_wait_timeout);
2822 }
2823
2824restore_data_eps:
2825
2826
2827
2828
2829 defect7374_disable_data_eps(dev);
2830
2831 set_idx_reg(dev->regs, SCRATCH, scratch);
2832
2833 return;
2834}
2835
2836static void ep_clear_seqnum(struct net2280_ep *ep)
2837{
2838 struct net2280 *dev = ep->dev;
2839 u32 val;
2840 static const u32 ep_pl[9] = { 0, 3, 4, 7, 8, 2, 5, 6, 9 };
2841
2842 val = readl(&dev->plregs->pl_ep_ctrl) & ~0x1f;
2843 val |= ep_pl[ep->num];
2844 writel(val, &dev->plregs->pl_ep_ctrl);
2845 val |= BIT(SEQUENCE_NUMBER_RESET);
2846 writel(val, &dev->plregs->pl_ep_ctrl);
2847
2848 return;
2849}
2850
2851static void handle_stat0_irqs_superspeed(struct net2280 *dev,
2852 struct net2280_ep *ep, struct usb_ctrlrequest r)
2853{
2854 int tmp = 0;
2855
2856#define w_value le16_to_cpu(r.wValue)
2857#define w_index le16_to_cpu(r.wIndex)
2858#define w_length le16_to_cpu(r.wLength)
2859
2860 switch (r.bRequest) {
2861 struct net2280_ep *e;
2862 u16 status;
2863
2864 case USB_REQ_SET_CONFIGURATION:
2865 dev->addressed_state = !w_value;
2866 goto usb3_delegate;
2867
2868 case USB_REQ_GET_STATUS:
2869 switch (r.bRequestType) {
2870 case (USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_DEVICE):
2871 status = dev->wakeup_enable ? 0x02 : 0x00;
2872 if (dev->gadget.is_selfpowered)
2873 status |= BIT(0);
2874 status |= (dev->u1_enable << 2 | dev->u2_enable << 3 |
2875 dev->ltm_enable << 4);
2876 writel(0, &dev->epregs[0].ep_irqenb);
2877 set_fifo_bytecount(ep, sizeof(status));
2878 writel((__force u32) status, &dev->epregs[0].ep_data);
2879 allow_status_338x(ep);
2880 break;
2881
2882 case (USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_ENDPOINT):
2883 e = get_ep_by_addr(dev, w_index);
2884 if (!e)
2885 goto do_stall3;
2886 status = readl(&e->regs->ep_rsp) &
2887 BIT(CLEAR_ENDPOINT_HALT);
2888 writel(0, &dev->epregs[0].ep_irqenb);
2889 set_fifo_bytecount(ep, sizeof(status));
2890 writel((__force u32) status, &dev->epregs[0].ep_data);
2891 allow_status_338x(ep);
2892 break;
2893
2894 default:
2895 goto usb3_delegate;
2896 }
2897 break;
2898
2899 case USB_REQ_CLEAR_FEATURE:
2900 switch (r.bRequestType) {
2901 case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE):
2902 if (!dev->addressed_state) {
2903 switch (w_value) {
2904 case USB_DEVICE_U1_ENABLE:
2905 dev->u1_enable = 0;
2906 writel(readl(&dev->usb_ext->usbctl2) &
2907 ~BIT(U1_ENABLE),
2908 &dev->usb_ext->usbctl2);
2909 allow_status_338x(ep);
2910 goto next_endpoints3;
2911
2912 case USB_DEVICE_U2_ENABLE:
2913 dev->u2_enable = 0;
2914 writel(readl(&dev->usb_ext->usbctl2) &
2915 ~BIT(U2_ENABLE),
2916 &dev->usb_ext->usbctl2);
2917 allow_status_338x(ep);
2918 goto next_endpoints3;
2919
2920 case USB_DEVICE_LTM_ENABLE:
2921 dev->ltm_enable = 0;
2922 writel(readl(&dev->usb_ext->usbctl2) &
2923 ~BIT(LTM_ENABLE),
2924 &dev->usb_ext->usbctl2);
2925 allow_status_338x(ep);
2926 goto next_endpoints3;
2927
2928 default:
2929 break;
2930 }
2931 }
2932 if (w_value == USB_DEVICE_REMOTE_WAKEUP) {
2933 dev->wakeup_enable = 0;
2934 writel(readl(&dev->usb->usbctl) &
2935 ~BIT(DEVICE_REMOTE_WAKEUP_ENABLE),
2936 &dev->usb->usbctl);
2937 allow_status_338x(ep);
2938 break;
2939 }
2940 goto usb3_delegate;
2941
2942 case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_ENDPOINT):
2943 e = get_ep_by_addr(dev, w_index);
2944 if (!e)
2945 goto do_stall3;
2946 if (w_value != USB_ENDPOINT_HALT)
2947 goto do_stall3;
2948 ep_vdbg(dev, "%s clear halt\n", e->ep.name);
2949
2950
2951
2952
2953 ep_clear_seqnum(e);
2954 clear_halt(e);
2955 if (!list_empty(&e->queue) && e->td_dma)
2956 restart_dma(e);
2957 allow_status(ep);
2958 ep->stopped = 1;
2959 break;
2960
2961 default:
2962 goto usb3_delegate;
2963 }
2964 break;
2965 case USB_REQ_SET_FEATURE:
2966 switch (r.bRequestType) {
2967 case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE):
2968 if (!dev->addressed_state) {
2969 switch (w_value) {
2970 case USB_DEVICE_U1_ENABLE:
2971 dev->u1_enable = 1;
2972 writel(readl(&dev->usb_ext->usbctl2) |
2973 BIT(U1_ENABLE),
2974 &dev->usb_ext->usbctl2);
2975 allow_status_338x(ep);
2976 goto next_endpoints3;
2977
2978 case USB_DEVICE_U2_ENABLE:
2979 dev->u2_enable = 1;
2980 writel(readl(&dev->usb_ext->usbctl2) |
2981 BIT(U2_ENABLE),
2982 &dev->usb_ext->usbctl2);
2983 allow_status_338x(ep);
2984 goto next_endpoints3;
2985
2986 case USB_DEVICE_LTM_ENABLE:
2987 dev->ltm_enable = 1;
2988 writel(readl(&dev->usb_ext->usbctl2) |
2989 BIT(LTM_ENABLE),
2990 &dev->usb_ext->usbctl2);
2991 allow_status_338x(ep);
2992 goto next_endpoints3;
2993 default:
2994 break;
2995 }
2996 }
2997
2998 if (w_value == USB_DEVICE_REMOTE_WAKEUP) {
2999 dev->wakeup_enable = 1;
3000 writel(readl(&dev->usb->usbctl) |
3001 BIT(DEVICE_REMOTE_WAKEUP_ENABLE),
3002 &dev->usb->usbctl);
3003 allow_status_338x(ep);
3004 break;
3005 }
3006 goto usb3_delegate;
3007
3008 case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_ENDPOINT):
3009 e = get_ep_by_addr(dev, w_index);
3010 if (!e || (w_value != USB_ENDPOINT_HALT))
3011 goto do_stall3;
3012 ep->stopped = 1;
3013 if (ep->num == 0)
3014 ep->dev->protocol_stall = 1;
3015 else {
3016 if (ep->dma)
3017 abort_dma(ep);
3018 set_halt(ep);
3019 }
3020 allow_status_338x(ep);
3021 break;
3022
3023 default:
3024 goto usb3_delegate;
3025 }
3026
3027 break;
3028 default:
3029
3030usb3_delegate:
3031 ep_vdbg(dev, "setup %02x.%02x v%04x i%04x l%04x ep_cfg %08x\n",
3032 r.bRequestType, r.bRequest,
3033 w_value, w_index, w_length,
3034 readl(&ep->cfg->ep_cfg));
3035
3036 ep->responded = 0;
3037 spin_unlock(&dev->lock);
3038 tmp = dev->driver->setup(&dev->gadget, &r);
3039 spin_lock(&dev->lock);
3040 }
3041do_stall3:
3042 if (tmp < 0) {
3043 ep_vdbg(dev, "req %02x.%02x protocol STALL; stat %d\n",
3044 r.bRequestType, r.bRequest, tmp);
3045 dev->protocol_stall = 1;
3046
3047 set_halt(ep);
3048 }
3049
3050next_endpoints3:
3051
3052#undef w_value
3053#undef w_index
3054#undef w_length
3055
3056 return;
3057}
3058
3059static void usb338x_handle_ep_intr(struct net2280 *dev, u32 stat0)
3060{
3061 u32 index;
3062 u32 bit;
3063
3064 for (index = 0; index < ARRAY_SIZE(ep_bit); index++) {
3065 bit = BIT(ep_bit[index]);
3066
3067 if (!stat0)
3068 break;
3069
3070 if (!(stat0 & bit))
3071 continue;
3072
3073 stat0 &= ~bit;
3074
3075 handle_ep_small(&dev->ep[index]);
3076 }
3077}
3078
3079static void handle_stat0_irqs(struct net2280 *dev, u32 stat)
3080{
3081 struct net2280_ep *ep;
3082 u32 num, scratch;
3083
3084
3085 stat &= ~BIT(INTA_ASSERTED);
3086 if (!stat)
3087 return;
3088
3089
3090
3091 if (unlikely(stat & BIT(SETUP_PACKET_INTERRUPT))) {
3092 union {
3093 u32 raw[2];
3094 struct usb_ctrlrequest r;
3095 } u;
3096 int tmp;
3097 struct net2280_request *req;
3098
3099 if (dev->gadget.speed == USB_SPEED_UNKNOWN) {
3100 u32 val = readl(&dev->usb->usbstat);
3101 if (val & BIT(SUPER_SPEED)) {
3102 dev->gadget.speed = USB_SPEED_SUPER;
3103 usb_ep_set_maxpacket_limit(&dev->ep[0].ep,
3104 EP0_SS_MAX_PACKET_SIZE);
3105 } else if (val & BIT(HIGH_SPEED)) {
3106 dev->gadget.speed = USB_SPEED_HIGH;
3107 usb_ep_set_maxpacket_limit(&dev->ep[0].ep,
3108 EP0_HS_MAX_PACKET_SIZE);
3109 } else {
3110 dev->gadget.speed = USB_SPEED_FULL;
3111 usb_ep_set_maxpacket_limit(&dev->ep[0].ep,
3112 EP0_HS_MAX_PACKET_SIZE);
3113 }
3114 net2280_led_speed(dev, dev->gadget.speed);
3115 ep_dbg(dev, "%s\n",
3116 usb_speed_string(dev->gadget.speed));
3117 }
3118
3119 ep = &dev->ep[0];
3120 ep->irqs++;
3121
3122
3123 stat &= ~BIT(ENDPOINT_0_INTERRUPT);
3124 while (!list_empty(&ep->queue)) {
3125 req = list_entry(ep->queue.next,
3126 struct net2280_request, queue);
3127 done(ep, req, (req->req.actual == req->req.length)
3128 ? 0 : -EPROTO);
3129 }
3130 ep->stopped = 0;
3131 dev->protocol_stall = 0;
3132 if (!(dev->quirks & PLX_PCIE)) {
3133 if (ep->dev->quirks & PLX_2280)
3134 tmp = BIT(FIFO_OVERFLOW) |
3135 BIT(FIFO_UNDERFLOW);
3136 else
3137 tmp = 0;
3138
3139 writel(tmp | BIT(TIMEOUT) |
3140 BIT(USB_STALL_SENT) |
3141 BIT(USB_IN_NAK_SENT) |
3142 BIT(USB_IN_ACK_RCVD) |
3143 BIT(USB_OUT_PING_NAK_SENT) |
3144 BIT(USB_OUT_ACK_SENT) |
3145 BIT(SHORT_PACKET_OUT_DONE_INTERRUPT) |
3146 BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT) |
3147 BIT(DATA_PACKET_RECEIVED_INTERRUPT) |
3148 BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) |
3149 BIT(DATA_OUT_PING_TOKEN_INTERRUPT) |
3150 BIT(DATA_IN_TOKEN_INTERRUPT),
3151 &ep->regs->ep_stat);
3152 }
3153 u.raw[0] = readl(&dev->usb->setup0123);
3154 u.raw[1] = readl(&dev->usb->setup4567);
3155
3156 cpu_to_le32s(&u.raw[0]);
3157 cpu_to_le32s(&u.raw[1]);
3158
3159 if ((dev->quirks & PLX_PCIE) && !dev->bug7734_patched)
3160 defect7374_workaround(dev, u.r);
3161
3162 tmp = 0;
3163
3164#define w_value le16_to_cpu(u.r.wValue)
3165#define w_index le16_to_cpu(u.r.wIndex)
3166#define w_length le16_to_cpu(u.r.wLength)
3167
3168
3169 writel(BIT(SETUP_PACKET_INTERRUPT), &dev->regs->irqstat0);
3170 stat ^= BIT(SETUP_PACKET_INTERRUPT);
3171
3172
3173
3174
3175
3176
3177 ep->is_in = (u.r.bRequestType & USB_DIR_IN) != 0;
3178 if (ep->is_in) {
3179 scratch = BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) |
3180 BIT(DATA_OUT_PING_TOKEN_INTERRUPT) |
3181 BIT(DATA_IN_TOKEN_INTERRUPT);
3182 stop_out_naking(ep);
3183 } else
3184 scratch = BIT(DATA_PACKET_RECEIVED_INTERRUPT) |
3185 BIT(DATA_OUT_PING_TOKEN_INTERRUPT) |
3186 BIT(DATA_IN_TOKEN_INTERRUPT);
3187 writel(scratch, &dev->epregs[0].ep_irqenb);
3188
3189
3190
3191
3192 ep->responded = 1;
3193
3194 if (dev->gadget.speed == USB_SPEED_SUPER) {
3195 handle_stat0_irqs_superspeed(dev, ep, u.r);
3196 goto next_endpoints;
3197 }
3198
3199 switch (u.r.bRequest) {
3200 case USB_REQ_GET_STATUS: {
3201 struct net2280_ep *e;
3202 __le32 status;
3203
3204
3205 if (u.r.bRequestType != (USB_DIR_IN|USB_RECIP_ENDPOINT))
3206 goto delegate;
3207 e = get_ep_by_addr(dev, w_index);
3208 if (!e || w_length > 2)
3209 goto do_stall;
3210
3211 if (readl(&e->regs->ep_rsp) & BIT(SET_ENDPOINT_HALT))
3212 status = cpu_to_le32(1);
3213 else
3214 status = cpu_to_le32(0);
3215
3216
3217 writel(0, &dev->epregs[0].ep_irqenb);
3218 set_fifo_bytecount(ep, w_length);
3219 writel((__force u32)status, &dev->epregs[0].ep_data);
3220 allow_status(ep);
3221 ep_vdbg(dev, "%s stat %02x\n", ep->ep.name, status);
3222 goto next_endpoints;
3223 }
3224 break;
3225 case USB_REQ_CLEAR_FEATURE: {
3226 struct net2280_ep *e;
3227
3228
3229 if (u.r.bRequestType != USB_RECIP_ENDPOINT)
3230 goto delegate;
3231 if (w_value != USB_ENDPOINT_HALT || w_length != 0)
3232 goto do_stall;
3233 e = get_ep_by_addr(dev, w_index);
3234 if (!e)
3235 goto do_stall;
3236 if (e->wedged) {
3237 ep_vdbg(dev, "%s wedged, halt not cleared\n",
3238 ep->ep.name);
3239 } else {
3240 ep_vdbg(dev, "%s clear halt\n", e->ep.name);
3241 clear_halt(e);
3242 if ((ep->dev->quirks & PLX_PCIE) &&
3243 !list_empty(&e->queue) && e->td_dma)
3244 restart_dma(e);
3245 }
3246 allow_status(ep);
3247 goto next_endpoints;
3248 }
3249 break;
3250 case USB_REQ_SET_FEATURE: {
3251 struct net2280_ep *e;
3252
3253
3254 if (u.r.bRequestType != USB_RECIP_ENDPOINT)
3255 goto delegate;
3256 if (w_value != USB_ENDPOINT_HALT || w_length != 0)
3257 goto do_stall;
3258 e = get_ep_by_addr(dev, w_index);
3259 if (!e)
3260 goto do_stall;
3261 if (e->ep.name == ep0name)
3262 goto do_stall;
3263 set_halt(e);
3264 if ((dev->quirks & PLX_PCIE) && e->dma)
3265 abort_dma(e);
3266 allow_status(ep);
3267 ep_vdbg(dev, "%s set halt\n", ep->ep.name);
3268 goto next_endpoints;
3269 }
3270 break;
3271 default:
3272delegate:
3273 ep_vdbg(dev, "setup %02x.%02x v%04x i%04x l%04x "
3274 "ep_cfg %08x\n",
3275 u.r.bRequestType, u.r.bRequest,
3276 w_value, w_index, w_length,
3277 readl(&ep->cfg->ep_cfg));
3278 ep->responded = 0;
3279 spin_unlock(&dev->lock);
3280 tmp = dev->driver->setup(&dev->gadget, &u.r);
3281 spin_lock(&dev->lock);
3282 }
3283
3284
3285 if (tmp < 0) {
3286do_stall:
3287 ep_vdbg(dev, "req %02x.%02x protocol STALL; stat %d\n",
3288 u.r.bRequestType, u.r.bRequest, tmp);
3289 dev->protocol_stall = 1;
3290 }
3291
3292
3293
3294
3295
3296 }
3297
3298#undef w_value
3299#undef w_index
3300#undef w_length
3301
3302next_endpoints:
3303 if ((dev->quirks & PLX_PCIE) && dev->enhanced_mode) {
3304 u32 mask = (BIT(ENDPOINT_0_INTERRUPT) |
3305 USB3380_IRQSTAT0_EP_INTR_MASK_IN |
3306 USB3380_IRQSTAT0_EP_INTR_MASK_OUT);
3307
3308 if (stat & mask) {
3309 usb338x_handle_ep_intr(dev, stat & mask);
3310 stat &= ~mask;
3311 }
3312 } else {
3313
3314 scratch = stat & 0x7f;
3315 stat &= ~0x7f;
3316 for (num = 0; scratch; num++) {
3317 u32 t;
3318
3319
3320 t = BIT(num);
3321 if ((scratch & t) == 0)
3322 continue;
3323 scratch ^= t;
3324
3325 ep = &dev->ep[num];
3326 handle_ep_small(ep);
3327 }
3328 }
3329
3330 if (stat)
3331 ep_dbg(dev, "unhandled irqstat0 %08x\n", stat);
3332}
3333
3334#define DMA_INTERRUPTS (BIT(DMA_D_INTERRUPT) | \
3335 BIT(DMA_C_INTERRUPT) | \
3336 BIT(DMA_B_INTERRUPT) | \
3337 BIT(DMA_A_INTERRUPT))
3338#define PCI_ERROR_INTERRUPTS ( \
3339 BIT(PCI_MASTER_ABORT_RECEIVED_INTERRUPT) | \
3340 BIT(PCI_TARGET_ABORT_RECEIVED_INTERRUPT) | \
3341 BIT(PCI_RETRY_ABORT_INTERRUPT))
3342
3343static void handle_stat1_irqs(struct net2280 *dev, u32 stat)
3344__releases(dev->lock)
3345__acquires(dev->lock)
3346{
3347 struct net2280_ep *ep;
3348 u32 tmp, num, mask, scratch;
3349
3350
3351 tmp = BIT(VBUS_INTERRUPT) | BIT(ROOT_PORT_RESET_INTERRUPT);
3352 mask = BIT(SUPER_SPEED) | BIT(HIGH_SPEED) | BIT(FULL_SPEED);
3353
3354
3355
3356
3357
3358
3359 if (stat & tmp) {
3360 bool reset = false;
3361 bool disconnect = false;
3362
3363
3364
3365
3366
3367 writel(tmp, &dev->regs->irqstat1);
3368 if (dev->gadget.speed != USB_SPEED_UNKNOWN) {
3369 if ((stat & BIT(VBUS_INTERRUPT)) &&
3370 (readl(&dev->usb->usbctl) &
3371 BIT(VBUS_PIN)) == 0) {
3372 disconnect = true;
3373 ep_dbg(dev, "disconnect %s\n",
3374 dev->driver->driver.name);
3375 } else if ((stat & BIT(ROOT_PORT_RESET_INTERRUPT)) &&
3376 (readl(&dev->usb->usbstat) & mask)
3377 == 0) {
3378 reset = true;
3379 ep_dbg(dev, "reset %s\n",
3380 dev->driver->driver.name);
3381 }
3382
3383 if (disconnect || reset) {
3384 stop_activity(dev, dev->driver);
3385 ep0_start(dev);
3386 spin_unlock(&dev->lock);
3387 if (reset)
3388 usb_gadget_udc_reset
3389 (&dev->gadget, dev->driver);
3390 else
3391 (dev->driver->disconnect)
3392 (&dev->gadget);
3393 spin_lock(&dev->lock);
3394 return;
3395 }
3396 }
3397 stat &= ~tmp;
3398
3399
3400
3401
3402 if (!stat)
3403 return;
3404 }
3405
3406
3407
3408
3409 tmp = BIT(SUSPEND_REQUEST_CHANGE_INTERRUPT);
3410 if (stat & tmp) {
3411 writel(tmp, &dev->regs->irqstat1);
3412 spin_unlock(&dev->lock);
3413 if (stat & BIT(SUSPEND_REQUEST_INTERRUPT)) {
3414 if (dev->driver->suspend)
3415 dev->driver->suspend(&dev->gadget);
3416 if (!enable_suspend)
3417 stat &= ~BIT(SUSPEND_REQUEST_INTERRUPT);
3418 } else {
3419 if (dev->driver->resume)
3420 dev->driver->resume(&dev->gadget);
3421
3422 }
3423 spin_lock(&dev->lock);
3424 stat &= ~tmp;
3425 }
3426
3427
3428 if (stat)
3429 writel(stat, &dev->regs->irqstat1);
3430
3431
3432 if (dev->quirks & PLX_2280)
3433 stat &= ~(BIT(CONTROL_STATUS_INTERRUPT) |
3434 BIT(SUSPEND_REQUEST_INTERRUPT) |
3435 BIT(RESUME_INTERRUPT) |
3436 BIT(SOF_INTERRUPT));
3437 else
3438 stat &= ~(BIT(CONTROL_STATUS_INTERRUPT) |
3439 BIT(RESUME_INTERRUPT) |
3440 BIT(SOF_DOWN_INTERRUPT) |
3441 BIT(SOF_INTERRUPT));
3442
3443 if (!stat)
3444 return;
3445
3446
3447
3448 scratch = stat & DMA_INTERRUPTS;
3449 stat &= ~DMA_INTERRUPTS;
3450 scratch >>= 9;
3451 for (num = 0; scratch; num++) {
3452 struct net2280_dma_regs __iomem *dma;
3453
3454 tmp = BIT(num);
3455 if ((tmp & scratch) == 0)
3456 continue;
3457 scratch ^= tmp;
3458
3459 ep = &dev->ep[num + 1];
3460 dma = ep->dma;
3461
3462 if (!dma)
3463 continue;
3464
3465
3466 tmp = readl(&dma->dmastat);
3467 writel(tmp, &dma->dmastat);
3468
3469
3470 if (dev->quirks & PLX_PCIE) {
3471 u32 r_dmacount = readl(&dma->dmacount);
3472 if (!ep->is_in && (r_dmacount & 0x00FFFFFF) &&
3473 (tmp & BIT(DMA_TRANSACTION_DONE_INTERRUPT)))
3474 continue;
3475 }
3476
3477 if (!(tmp & BIT(DMA_TRANSACTION_DONE_INTERRUPT))) {
3478 ep_dbg(ep->dev, "%s no xact done? %08x\n",
3479 ep->ep.name, tmp);
3480 continue;
3481 }
3482 stop_dma(ep->dma);
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494 scan_dma_completions(ep);
3495
3496
3497 if (!list_empty(&ep->queue)) {
3498 tmp = readl(&dma->dmactl);
3499 restart_dma(ep);
3500 }
3501 ep->irqs++;
3502 }
3503
3504
3505
3506
3507 if (stat & PCI_ERROR_INTERRUPTS) {
3508 ep_err(dev, "pci dma error; stat %08x\n", stat);
3509 stat &= ~PCI_ERROR_INTERRUPTS;
3510
3511
3512
3513 stop_activity(dev, dev->driver);
3514 ep0_start(dev);
3515 stat = 0;
3516 }
3517
3518 if (stat)
3519 ep_dbg(dev, "unhandled irqstat1 %08x\n", stat);
3520}
3521
3522static irqreturn_t net2280_irq(int irq, void *_dev)
3523{
3524 struct net2280 *dev = _dev;
3525
3526
3527 if ((dev->quirks & PLX_LEGACY) &&
3528 (!(readl(&dev->regs->irqstat0) & BIT(INTA_ASSERTED))))
3529 return IRQ_NONE;
3530
3531 spin_lock(&dev->lock);
3532
3533
3534 handle_stat1_irqs(dev, readl(&dev->regs->irqstat1));
3535
3536
3537 handle_stat0_irqs(dev, readl(&dev->regs->irqstat0));
3538
3539 if (dev->quirks & PLX_PCIE) {
3540
3541 u32 pciirqenb1 = readl(&dev->regs->pciirqenb1);
3542 writel(pciirqenb1 & 0x7FFFFFFF, &dev->regs->pciirqenb1);
3543 writel(pciirqenb1, &dev->regs->pciirqenb1);
3544 }
3545
3546 spin_unlock(&dev->lock);
3547
3548 return IRQ_HANDLED;
3549}
3550
3551
3552
3553static void gadget_release(struct device *_dev)
3554{
3555 struct net2280 *dev = dev_get_drvdata(_dev);
3556
3557 kfree(dev);
3558}
3559
3560
3561
3562static void net2280_remove(struct pci_dev *pdev)
3563{
3564 struct net2280 *dev = pci_get_drvdata(pdev);
3565
3566 usb_del_gadget_udc(&dev->gadget);
3567
3568 BUG_ON(dev->driver);
3569
3570
3571 if (dev->requests) {
3572 int i;
3573 for (i = 1; i < 5; i++) {
3574 if (!dev->ep[i].dummy)
3575 continue;
3576 dma_pool_free(dev->requests, dev->ep[i].dummy,
3577 dev->ep[i].td_dma);
3578 }
3579 dma_pool_destroy(dev->requests);
3580 }
3581 if (dev->got_irq)
3582 free_irq(pdev->irq, dev);
3583 if (dev->quirks & PLX_PCIE)
3584 pci_disable_msi(pdev);
3585 if (dev->regs) {
3586 net2280_led_shutdown(dev);
3587 iounmap(dev->regs);
3588 }
3589 if (dev->region)
3590 release_mem_region(pci_resource_start(pdev, 0),
3591 pci_resource_len(pdev, 0));
3592 if (dev->enabled)
3593 pci_disable_device(pdev);
3594 device_remove_file(&pdev->dev, &dev_attr_registers);
3595
3596 ep_info(dev, "unbind\n");
3597}
3598
3599
3600
3601
3602
3603static int net2280_probe(struct pci_dev *pdev, const struct pci_device_id *id)
3604{
3605 struct net2280 *dev;
3606 unsigned long resource, len;
3607 void __iomem *base = NULL;
3608 int retval, i;
3609
3610
3611 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
3612 if (dev == NULL) {
3613 retval = -ENOMEM;
3614 goto done;
3615 }
3616
3617 pci_set_drvdata(pdev, dev);
3618 spin_lock_init(&dev->lock);
3619 dev->quirks = id->driver_data;
3620 dev->pdev = pdev;
3621 dev->gadget.ops = &net2280_ops;
3622 dev->gadget.max_speed = (dev->quirks & PLX_SUPERSPEED) ?
3623 USB_SPEED_SUPER : USB_SPEED_HIGH;
3624
3625
3626 dev->gadget.name = driver_name;
3627
3628
3629 if (pci_enable_device(pdev) < 0) {
3630 retval = -ENODEV;
3631 goto done;
3632 }
3633 dev->enabled = 1;
3634
3635
3636
3637
3638
3639 resource = pci_resource_start(pdev, 0);
3640 len = pci_resource_len(pdev, 0);
3641 if (!request_mem_region(resource, len, driver_name)) {
3642 ep_dbg(dev, "controller already in use\n");
3643 retval = -EBUSY;
3644 goto done;
3645 }
3646 dev->region = 1;
3647
3648
3649
3650
3651
3652 base = ioremap_nocache(resource, len);
3653 if (base == NULL) {
3654 ep_dbg(dev, "can't map memory\n");
3655 retval = -EFAULT;
3656 goto done;
3657 }
3658 dev->regs = (struct net2280_regs __iomem *) base;
3659 dev->usb = (struct net2280_usb_regs __iomem *) (base + 0x0080);
3660 dev->pci = (struct net2280_pci_regs __iomem *) (base + 0x0100);
3661 dev->dma = (struct net2280_dma_regs __iomem *) (base + 0x0180);
3662 dev->dep = (struct net2280_dep_regs __iomem *) (base + 0x0200);
3663 dev->epregs = (struct net2280_ep_regs __iomem *) (base + 0x0300);
3664
3665 if (dev->quirks & PLX_PCIE) {
3666 u32 fsmvalue;
3667 u32 usbstat;
3668 dev->usb_ext = (struct usb338x_usb_ext_regs __iomem *)
3669 (base + 0x00b4);
3670 dev->llregs = (struct usb338x_ll_regs __iomem *)
3671 (base + 0x0700);
3672 dev->ll_lfps_regs = (struct usb338x_ll_lfps_regs __iomem *)
3673 (base + 0x0748);
3674 dev->ll_tsn_regs = (struct usb338x_ll_tsn_regs __iomem *)
3675 (base + 0x077c);
3676 dev->ll_chicken_reg = (struct usb338x_ll_chi_regs __iomem *)
3677 (base + 0x079c);
3678 dev->plregs = (struct usb338x_pl_regs __iomem *)
3679 (base + 0x0800);
3680 usbstat = readl(&dev->usb->usbstat);
3681 dev->enhanced_mode = !!(usbstat & BIT(11));
3682 dev->n_ep = (dev->enhanced_mode) ? 9 : 5;
3683
3684 fsmvalue = get_idx_reg(dev->regs, SCRATCH) &
3685 (0xf << DEFECT7374_FSM_FIELD);
3686
3687 if (fsmvalue == DEFECT7374_FSM_SS_CONTROL_READ) {
3688 dev->bug7734_patched = 1;
3689 writel(0, &dev->usb->usbctl);
3690 } else
3691 dev->bug7734_patched = 0;
3692 } else {
3693 dev->enhanced_mode = 0;
3694 dev->n_ep = 7;
3695
3696 writel(0, &dev->usb->usbctl);
3697 }
3698
3699 usb_reset(dev);
3700 usb_reinit(dev);
3701
3702
3703 if (!pdev->irq) {
3704 ep_err(dev, "No IRQ. Check PCI setup!\n");
3705 retval = -ENODEV;
3706 goto done;
3707 }
3708
3709 if (dev->quirks & PLX_PCIE)
3710 if (pci_enable_msi(pdev))
3711 ep_err(dev, "Failed to enable MSI mode\n");
3712
3713 if (request_irq(pdev->irq, net2280_irq, IRQF_SHARED,
3714 driver_name, dev)) {
3715 ep_err(dev, "request interrupt %d failed\n", pdev->irq);
3716 retval = -EBUSY;
3717 goto done;
3718 }
3719 dev->got_irq = 1;
3720
3721
3722
3723 dev->requests = dma_pool_create("requests", &pdev->dev,
3724 sizeof(struct net2280_dma),
3725 0 ,
3726 0 );
3727 if (!dev->requests) {
3728 ep_dbg(dev, "can't get request pool\n");
3729 retval = -ENOMEM;
3730 goto done;
3731 }
3732 for (i = 1; i < 5; i++) {
3733 struct net2280_dma *td;
3734
3735 td = dma_pool_alloc(dev->requests, GFP_KERNEL,
3736 &dev->ep[i].td_dma);
3737 if (!td) {
3738 ep_dbg(dev, "can't get dummy %d\n", i);
3739 retval = -ENOMEM;
3740 goto done;
3741 }
3742 td->dmacount = 0;
3743 td->dmadesc = td->dmaaddr;
3744 dev->ep[i].dummy = td;
3745 }
3746
3747
3748 if (dev->quirks & PLX_LEGACY)
3749 writel(BIT(DMA_MEMORY_WRITE_AND_INVALIDATE_ENABLE) |
3750
3751
3752
3753
3754 BIT(DMA_READ_MULTIPLE_ENABLE) |
3755 BIT(DMA_READ_LINE_ENABLE),
3756 &dev->pci->pcimstctl);
3757
3758 pci_set_master(pdev);
3759 pci_try_set_mwi(pdev);
3760
3761
3762 dev->chiprev = get_idx_reg(dev->regs, REG_CHIPREV) & 0xffff;
3763
3764
3765 ep_info(dev, "%s\n", driver_desc);
3766 ep_info(dev, "irq %d, pci mem %p, chip rev %04x\n",
3767 pdev->irq, base, dev->chiprev);
3768 ep_info(dev, "version: " DRIVER_VERSION "; %s\n",
3769 dev->enhanced_mode ? "enhanced mode" : "legacy mode");
3770 retval = device_create_file(&pdev->dev, &dev_attr_registers);
3771 if (retval)
3772 goto done;
3773
3774 retval = usb_add_gadget_udc_release(&pdev->dev, &dev->gadget,
3775 gadget_release);
3776 if (retval)
3777 goto done;
3778 return 0;
3779
3780done:
3781 if (dev)
3782 net2280_remove(pdev);
3783 return retval;
3784}
3785
3786
3787
3788
3789
3790static void net2280_shutdown(struct pci_dev *pdev)
3791{
3792 struct net2280 *dev = pci_get_drvdata(pdev);
3793
3794
3795 writel(0, &dev->regs->pciirqenb0);
3796 writel(0, &dev->regs->pciirqenb1);
3797
3798
3799 writel(0, &dev->usb->usbctl);
3800
3801}
3802
3803
3804
3805
3806static const struct pci_device_id pci_ids[] = { {
3807 .class = PCI_CLASS_SERIAL_USB_DEVICE,
3808 .class_mask = ~0,
3809 .vendor = PCI_VENDOR_ID_PLX_LEGACY,
3810 .device = 0x2280,
3811 .subvendor = PCI_ANY_ID,
3812 .subdevice = PCI_ANY_ID,
3813 .driver_data = PLX_LEGACY | PLX_2280,
3814 }, {
3815 .class = PCI_CLASS_SERIAL_USB_DEVICE,
3816 .class_mask = ~0,
3817 .vendor = PCI_VENDOR_ID_PLX_LEGACY,
3818 .device = 0x2282,
3819 .subvendor = PCI_ANY_ID,
3820 .subdevice = PCI_ANY_ID,
3821 .driver_data = PLX_LEGACY,
3822 },
3823 {
3824 .class = PCI_CLASS_SERIAL_USB_DEVICE,
3825 .class_mask = ~0,
3826 .vendor = PCI_VENDOR_ID_PLX,
3827 .device = 0x2380,
3828 .subvendor = PCI_ANY_ID,
3829 .subdevice = PCI_ANY_ID,
3830 .driver_data = PLX_PCIE,
3831 },
3832 {
3833 .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe),
3834 .class_mask = ~0,
3835 .vendor = PCI_VENDOR_ID_PLX,
3836 .device = 0x3380,
3837 .subvendor = PCI_ANY_ID,
3838 .subdevice = PCI_ANY_ID,
3839 .driver_data = PLX_PCIE | PLX_SUPERSPEED,
3840 },
3841 {
3842 .class = PCI_CLASS_SERIAL_USB_DEVICE,
3843 .class_mask = ~0,
3844 .vendor = PCI_VENDOR_ID_PLX,
3845 .device = 0x3382,
3846 .subvendor = PCI_ANY_ID,
3847 .subdevice = PCI_ANY_ID,
3848 .driver_data = PLX_PCIE | PLX_SUPERSPEED,
3849 },
3850{ }
3851};
3852MODULE_DEVICE_TABLE(pci, pci_ids);
3853
3854
3855static struct pci_driver net2280_pci_driver = {
3856 .name = (char *) driver_name,
3857 .id_table = pci_ids,
3858
3859 .probe = net2280_probe,
3860 .remove = net2280_remove,
3861 .shutdown = net2280_shutdown,
3862
3863
3864};
3865
3866module_pci_driver(net2280_pci_driver);
3867
3868MODULE_DESCRIPTION(DRIVER_DESC);
3869MODULE_AUTHOR("David Brownell");
3870MODULE_LICENSE("GPL");
3871