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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#include <linux/iopoll.h>
56
57#include <asm/byteorder.h>
58#include <asm/irq.h>
59#include <asm/unaligned.h>
60
61#define DRIVER_DESC "PLX NET228x/USB338x USB Peripheral Controller"
62#define DRIVER_VERSION "2005 Sept 27/v3.0"
63
64#define EP_DONTUSE 13
65
66#define USE_RDK_LEDS
67
68
69static const char driver_name[] = "net2280";
70static const char driver_desc[] = DRIVER_DESC;
71
72static const u32 ep_bit[9] = { 0, 17, 2, 19, 4, 1, 18, 3, 20 };
73static const char ep0name[] = "ep0";
74
75#define EP_INFO(_name, _caps) \
76 { \
77 .name = _name, \
78 .caps = _caps, \
79 }
80
81static const struct {
82 const char *name;
83 const struct usb_ep_caps caps;
84} ep_info_dft[] = {
85 EP_INFO(ep0name,
86 USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL, USB_EP_CAPS_DIR_ALL)),
87 EP_INFO("ep-a",
88 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)),
89 EP_INFO("ep-b",
90 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)),
91 EP_INFO("ep-c",
92 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)),
93 EP_INFO("ep-d",
94 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)),
95 EP_INFO("ep-e",
96 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)),
97 EP_INFO("ep-f",
98 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)),
99 EP_INFO("ep-g",
100 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)),
101 EP_INFO("ep-h",
102 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)),
103}, ep_info_adv[] = {
104 EP_INFO(ep0name,
105 USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL, USB_EP_CAPS_DIR_ALL)),
106 EP_INFO("ep1in",
107 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)),
108 EP_INFO("ep2out",
109 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
110 EP_INFO("ep3in",
111 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)),
112 EP_INFO("ep4out",
113 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
114 EP_INFO("ep1out",
115 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
116 EP_INFO("ep2in",
117 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)),
118 EP_INFO("ep3out",
119 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
120 EP_INFO("ep4in",
121 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)),
122};
123
124#undef EP_INFO
125
126
127
128
129
130static ushort fifo_mode;
131
132
133module_param(fifo_mode, ushort, 0644);
134
135
136
137
138
139
140static bool enable_suspend;
141
142
143module_param(enable_suspend, bool, 0444);
144
145#define DIR_STRING(bAddress) (((bAddress) & USB_DIR_IN) ? "in" : "out")
146
147static char *type_string(u8 bmAttributes)
148{
149 switch ((bmAttributes) & USB_ENDPOINT_XFERTYPE_MASK) {
150 case USB_ENDPOINT_XFER_BULK: return "bulk";
151 case USB_ENDPOINT_XFER_ISOC: return "iso";
152 case USB_ENDPOINT_XFER_INT: return "intr";
153 }
154 return "control";
155}
156
157#include "net2280.h"
158
159#define valid_bit cpu_to_le32(BIT(VALID_BIT))
160#define dma_done_ie cpu_to_le32(BIT(DMA_DONE_INTERRUPT_ENABLE))
161
162static void ep_clear_seqnum(struct net2280_ep *ep);
163static void stop_activity(struct net2280 *dev,
164 struct usb_gadget_driver *driver);
165static void ep0_start(struct net2280 *dev);
166
167
168static inline void enable_pciirqenb(struct net2280_ep *ep)
169{
170 u32 tmp = readl(&ep->dev->regs->pciirqenb0);
171
172 if (ep->dev->quirks & PLX_LEGACY)
173 tmp |= BIT(ep->num);
174 else
175 tmp |= BIT(ep_bit[ep->num]);
176 writel(tmp, &ep->dev->regs->pciirqenb0);
177
178 return;
179}
180
181static int
182net2280_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
183{
184 struct net2280 *dev;
185 struct net2280_ep *ep;
186 u32 max;
187 u32 tmp = 0;
188 u32 type;
189 unsigned long flags;
190 static const u32 ep_key[9] = { 1, 0, 1, 0, 1, 1, 0, 1, 0 };
191 int ret = 0;
192
193 ep = container_of(_ep, struct net2280_ep, ep);
194 if (!_ep || !desc || ep->desc || _ep->name == ep0name ||
195 desc->bDescriptorType != USB_DT_ENDPOINT) {
196 pr_err("%s: failed at line=%d\n", __func__, __LINE__);
197 return -EINVAL;
198 }
199 dev = ep->dev;
200 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
201 ret = -ESHUTDOWN;
202 goto print_err;
203 }
204
205
206 if ((desc->bEndpointAddress & 0x0f) == EP_DONTUSE) {
207 ret = -EDOM;
208 goto print_err;
209 }
210
211 if (dev->quirks & PLX_PCIE) {
212 if ((desc->bEndpointAddress & 0x0f) >= 0x0c) {
213 ret = -EDOM;
214 goto print_err;
215 }
216 ep->is_in = !!usb_endpoint_dir_in(desc);
217 if (dev->enhanced_mode && ep->is_in && ep_key[ep->num]) {
218 ret = -EINVAL;
219 goto print_err;
220 }
221 }
222
223
224 max = usb_endpoint_maxp(desc);
225 if (ep->num > 4 && max > 64 && (dev->quirks & PLX_LEGACY)) {
226 ret = -ERANGE;
227 goto print_err;
228 }
229
230 spin_lock_irqsave(&dev->lock, flags);
231 _ep->maxpacket = max;
232 ep->desc = desc;
233
234
235 ep->stopped = 0;
236 ep->wedged = 0;
237 ep->out_overflow = 0;
238
239
240 set_max_speed(ep, max);
241
242
243 writel(BIT(FIFO_FLUSH), &ep->regs->ep_stat);
244
245 if ((dev->quirks & PLX_PCIE) && dev->enhanced_mode) {
246 tmp = readl(&ep->cfg->ep_cfg);
247
248 if ((tmp & 0xf) != usb_endpoint_num(desc)) {
249 ret = -EINVAL;
250 spin_unlock_irqrestore(&dev->lock, flags);
251 goto print_err;
252 }
253 if (ep->is_in)
254 tmp &= ~USB3380_EP_CFG_MASK_IN;
255 else
256 tmp &= ~USB3380_EP_CFG_MASK_OUT;
257 }
258 type = (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK);
259 if (type == USB_ENDPOINT_XFER_INT) {
260
261 if (dev->chiprev == 0100 &&
262 dev->gadget.speed == USB_SPEED_HIGH &&
263 !(desc->bEndpointAddress & USB_DIR_IN))
264 writel(BIT(CLEAR_NAK_OUT_PACKETS_MODE),
265 &ep->regs->ep_rsp);
266 } else if (type == USB_ENDPOINT_XFER_BULK) {
267
268 if ((dev->gadget.speed == USB_SPEED_SUPER && max != 1024) ||
269 (dev->gadget.speed == USB_SPEED_HIGH && max != 512) ||
270 (dev->gadget.speed == USB_SPEED_FULL && max > 64)) {
271 spin_unlock_irqrestore(&dev->lock, flags);
272 ret = -ERANGE;
273 goto print_err;
274 }
275 }
276 ep->is_iso = (type == USB_ENDPOINT_XFER_ISOC);
277
278 if (dev->quirks & PLX_LEGACY) {
279 tmp |= type << ENDPOINT_TYPE;
280 tmp |= desc->bEndpointAddress;
281
282 tmp |= (4 << ENDPOINT_BYTE_COUNT);
283 tmp |= BIT(ENDPOINT_ENABLE);
284 ep->is_in = (tmp & USB_DIR_IN) != 0;
285 } else {
286
287 if (dev->enhanced_mode && ep->is_in) {
288 tmp |= type << IN_ENDPOINT_TYPE;
289 tmp |= BIT(IN_ENDPOINT_ENABLE);
290 } else {
291 tmp |= type << OUT_ENDPOINT_TYPE;
292 tmp |= BIT(OUT_ENDPOINT_ENABLE);
293 tmp |= (ep->is_in << ENDPOINT_DIRECTION);
294 }
295
296 tmp |= (4 << ENDPOINT_BYTE_COUNT);
297 if (!dev->enhanced_mode)
298 tmp |= usb_endpoint_num(desc);
299 tmp |= (ep->ep.maxburst << MAX_BURST_SIZE);
300 }
301
302
303 wmb();
304
305
306 if (!ep->is_in)
307 writel(BIT(SET_NAK_OUT_PACKETS), &ep->regs->ep_rsp);
308 else if (!(dev->quirks & PLX_2280)) {
309
310
311
312 writel(BIT(CLEAR_NAK_OUT_PACKETS) |
313 BIT(CLEAR_NAK_OUT_PACKETS_MODE), &ep->regs->ep_rsp);
314 }
315
316 if (dev->quirks & PLX_PCIE)
317 ep_clear_seqnum(ep);
318 writel(tmp, &ep->cfg->ep_cfg);
319
320
321 if (!ep->dma) {
322 enable_pciirqenb(ep);
323
324 tmp = BIT(DATA_PACKET_RECEIVED_INTERRUPT_ENABLE) |
325 BIT(DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE);
326 if (dev->quirks & PLX_2280)
327 tmp |= readl(&ep->regs->ep_irqenb);
328 writel(tmp, &ep->regs->ep_irqenb);
329 } else {
330 tmp = BIT((8 + ep->num));
331 tmp |= readl(&dev->regs->pciirqenb1);
332 writel(tmp, &dev->regs->pciirqenb1);
333
334
335
336
337
338 if ((desc->bEndpointAddress & USB_DIR_IN) == 0) {
339 tmp = BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT_ENABLE);
340 writel(tmp, &ep->regs->ep_irqenb);
341
342 enable_pciirqenb(ep);
343 }
344 }
345
346 tmp = desc->bEndpointAddress;
347 ep_dbg(dev, "enabled %s (ep%d%s-%s) %s max %04x\n",
348 _ep->name, tmp & 0x0f, DIR_STRING(tmp),
349 type_string(desc->bmAttributes),
350 ep->dma ? "dma" : "pio", max);
351
352
353 spin_unlock_irqrestore(&dev->lock, flags);
354 return ret;
355
356print_err:
357 dev_err(&ep->dev->pdev->dev, "%s: error=%d\n", __func__, ret);
358 return ret;
359}
360
361static int handshake(u32 __iomem *ptr, u32 mask, u32 done, int usec)
362{
363 u32 result;
364 int ret;
365
366 ret = readl_poll_timeout_atomic(ptr, result,
367 ((result & mask) == done ||
368 result == U32_MAX),
369 1, usec);
370 if (result == U32_MAX)
371 return -ENODEV;
372
373 return ret;
374}
375
376static const struct usb_ep_ops net2280_ep_ops;
377
378static void ep_reset_228x(struct net2280_regs __iomem *regs,
379 struct net2280_ep *ep)
380{
381 u32 tmp;
382
383 ep->desc = NULL;
384 INIT_LIST_HEAD(&ep->queue);
385
386 usb_ep_set_maxpacket_limit(&ep->ep, ~0);
387 ep->ep.ops = &net2280_ep_ops;
388
389
390 if (ep->dma) {
391 writel(0, &ep->dma->dmactl);
392 writel(BIT(DMA_SCATTER_GATHER_DONE_INTERRUPT) |
393 BIT(DMA_TRANSACTION_DONE_INTERRUPT) |
394 BIT(DMA_ABORT),
395 &ep->dma->dmastat);
396
397 tmp = readl(®s->pciirqenb0);
398 tmp &= ~BIT(ep->num);
399 writel(tmp, ®s->pciirqenb0);
400 } else {
401 tmp = readl(®s->pciirqenb1);
402 tmp &= ~BIT((8 + ep->num));
403 writel(tmp, ®s->pciirqenb1);
404 }
405 writel(0, &ep->regs->ep_irqenb);
406
407
408
409
410 if (!ep->is_in || (ep->dev->quirks & PLX_2280)) {
411 tmp = BIT(SET_NAK_OUT_PACKETS_MODE) |
412 BIT(SET_NAK_OUT_PACKETS) |
413 BIT(CLEAR_EP_HIDE_STATUS_PHASE) |
414 BIT(CLEAR_INTERRUPT_MODE);
415 } else {
416
417 tmp = BIT(CLEAR_NAK_OUT_PACKETS_MODE) |
418 BIT(CLEAR_NAK_OUT_PACKETS) |
419 BIT(CLEAR_EP_HIDE_STATUS_PHASE) |
420 BIT(CLEAR_INTERRUPT_MODE);
421 }
422
423 if (ep->num != 0) {
424 tmp |= BIT(CLEAR_ENDPOINT_TOGGLE) |
425 BIT(CLEAR_ENDPOINT_HALT);
426 }
427 writel(tmp, &ep->regs->ep_rsp);
428
429
430 if (ep->dev->quirks & PLX_2280)
431 tmp = BIT(FIFO_OVERFLOW) |
432 BIT(FIFO_UNDERFLOW);
433 else
434 tmp = 0;
435
436 writel(tmp | BIT(TIMEOUT) |
437 BIT(USB_STALL_SENT) |
438 BIT(USB_IN_NAK_SENT) |
439 BIT(USB_IN_ACK_RCVD) |
440 BIT(USB_OUT_PING_NAK_SENT) |
441 BIT(USB_OUT_ACK_SENT) |
442 BIT(FIFO_FLUSH) |
443 BIT(SHORT_PACKET_OUT_DONE_INTERRUPT) |
444 BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT) |
445 BIT(DATA_PACKET_RECEIVED_INTERRUPT) |
446 BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) |
447 BIT(DATA_OUT_PING_TOKEN_INTERRUPT) |
448 BIT(DATA_IN_TOKEN_INTERRUPT),
449 &ep->regs->ep_stat);
450
451
452}
453
454static void ep_reset_338x(struct net2280_regs __iomem *regs,
455 struct net2280_ep *ep)
456{
457 u32 tmp, dmastat;
458
459 ep->desc = NULL;
460 INIT_LIST_HEAD(&ep->queue);
461
462 usb_ep_set_maxpacket_limit(&ep->ep, ~0);
463 ep->ep.ops = &net2280_ep_ops;
464
465
466 if (ep->dma) {
467 writel(0, &ep->dma->dmactl);
468 writel(BIT(DMA_ABORT_DONE_INTERRUPT) |
469 BIT(DMA_PAUSE_DONE_INTERRUPT) |
470 BIT(DMA_SCATTER_GATHER_DONE_INTERRUPT) |
471 BIT(DMA_TRANSACTION_DONE_INTERRUPT),
472
473 &ep->dma->dmastat);
474
475 dmastat = readl(&ep->dma->dmastat);
476 if (dmastat == 0x5002) {
477 ep_warn(ep->dev, "The dmastat return = %x!!\n",
478 dmastat);
479 writel(0x5a, &ep->dma->dmastat);
480 }
481
482 tmp = readl(®s->pciirqenb0);
483 tmp &= ~BIT(ep_bit[ep->num]);
484 writel(tmp, ®s->pciirqenb0);
485 } else {
486 if (ep->num < 5) {
487 tmp = readl(®s->pciirqenb1);
488 tmp &= ~BIT((8 + ep->num));
489 writel(tmp, ®s->pciirqenb1);
490 }
491 }
492 writel(0, &ep->regs->ep_irqenb);
493
494 writel(BIT(SHORT_PACKET_OUT_DONE_INTERRUPT) |
495 BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT) |
496 BIT(FIFO_OVERFLOW) |
497 BIT(DATA_PACKET_RECEIVED_INTERRUPT) |
498 BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) |
499 BIT(DATA_OUT_PING_TOKEN_INTERRUPT) |
500 BIT(DATA_IN_TOKEN_INTERRUPT), &ep->regs->ep_stat);
501
502 tmp = readl(&ep->cfg->ep_cfg);
503 if (ep->is_in)
504 tmp &= ~USB3380_EP_CFG_MASK_IN;
505 else
506 tmp &= ~USB3380_EP_CFG_MASK_OUT;
507 writel(tmp, &ep->cfg->ep_cfg);
508}
509
510static void nuke(struct net2280_ep *);
511
512static int net2280_disable(struct usb_ep *_ep)
513{
514 struct net2280_ep *ep;
515 unsigned long flags;
516
517 ep = container_of(_ep, struct net2280_ep, ep);
518 if (!_ep || _ep->name == ep0name) {
519 pr_err("%s: Invalid ep=%p\n", __func__, _ep);
520 return -EINVAL;
521 }
522 spin_lock_irqsave(&ep->dev->lock, flags);
523 nuke(ep);
524
525 if (ep->dev->quirks & PLX_PCIE)
526 ep_reset_338x(ep->dev->regs, ep);
527 else
528 ep_reset_228x(ep->dev->regs, ep);
529
530 ep_vdbg(ep->dev, "disabled %s %s\n",
531 ep->dma ? "dma" : "pio", _ep->name);
532
533
534 (void)readl(&ep->cfg->ep_cfg);
535
536 if (!ep->dma && ep->num >= 1 && ep->num <= 4)
537 ep->dma = &ep->dev->dma[ep->num - 1];
538
539 spin_unlock_irqrestore(&ep->dev->lock, flags);
540 return 0;
541}
542
543
544
545static struct usb_request
546*net2280_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
547{
548 struct net2280_ep *ep;
549 struct net2280_request *req;
550
551 if (!_ep) {
552 pr_err("%s: Invalid ep\n", __func__);
553 return NULL;
554 }
555 ep = container_of(_ep, struct net2280_ep, ep);
556
557 req = kzalloc(sizeof(*req), gfp_flags);
558 if (!req)
559 return NULL;
560
561 INIT_LIST_HEAD(&req->queue);
562
563
564 if (ep->dma) {
565 struct net2280_dma *td;
566
567 td = dma_pool_alloc(ep->dev->requests, gfp_flags,
568 &req->td_dma);
569 if (!td) {
570 kfree(req);
571 return NULL;
572 }
573 td->dmacount = 0;
574 td->dmadesc = td->dmaaddr;
575 req->td = td;
576 }
577 return &req->req;
578}
579
580static void net2280_free_request(struct usb_ep *_ep, struct usb_request *_req)
581{
582 struct net2280_ep *ep;
583 struct net2280_request *req;
584
585 ep = container_of(_ep, struct net2280_ep, ep);
586 if (!_ep || !_req) {
587 dev_err(&ep->dev->pdev->dev, "%s: Invalid ep=%p or req=%p\n",
588 __func__, _ep, _req);
589 return;
590 }
591
592 req = container_of(_req, struct net2280_request, req);
593 WARN_ON(!list_empty(&req->queue));
594 if (req->td)
595 dma_pool_free(ep->dev->requests, req->td, req->td_dma);
596 kfree(req);
597}
598
599
600
601
602
603
604
605
606
607
608static void write_fifo(struct net2280_ep *ep, struct usb_request *req)
609{
610 struct net2280_ep_regs __iomem *regs = ep->regs;
611 u8 *buf;
612 u32 tmp;
613 unsigned count, total;
614
615
616
617 if (req) {
618 buf = req->buf + req->actual;
619 prefetch(buf);
620 total = req->length - req->actual;
621 } else {
622 total = 0;
623 buf = NULL;
624 }
625
626
627 count = ep->ep.maxpacket;
628 if (count > total)
629 count = total;
630
631 ep_vdbg(ep->dev, "write %s fifo (IN) %d bytes%s req %p\n",
632 ep->ep.name, count,
633 (count != ep->ep.maxpacket) ? " (short)" : "",
634 req);
635 while (count >= 4) {
636
637
638
639
640 tmp = get_unaligned((u32 *)buf);
641 cpu_to_le32s(&tmp);
642 writel(tmp, ®s->ep_data);
643 buf += 4;
644 count -= 4;
645 }
646
647
648
649
650
651 if (count || total < ep->ep.maxpacket) {
652 tmp = count ? get_unaligned((u32 *)buf) : count;
653 cpu_to_le32s(&tmp);
654 set_fifo_bytecount(ep, count & 0x03);
655 writel(tmp, ®s->ep_data);
656 }
657
658
659}
660
661
662
663
664
665
666
667
668static void out_flush(struct net2280_ep *ep)
669{
670 u32 __iomem *statp;
671 u32 tmp;
672
673 statp = &ep->regs->ep_stat;
674
675 tmp = readl(statp);
676 if (tmp & BIT(NAK_OUT_PACKETS)) {
677 ep_dbg(ep->dev, "%s %s %08x !NAK\n",
678 ep->ep.name, __func__, tmp);
679 writel(BIT(SET_NAK_OUT_PACKETS), &ep->regs->ep_rsp);
680 }
681
682 writel(BIT(DATA_OUT_PING_TOKEN_INTERRUPT) |
683 BIT(DATA_PACKET_RECEIVED_INTERRUPT),
684 statp);
685 writel(BIT(FIFO_FLUSH), statp);
686
687 mb();
688 tmp = readl(statp);
689 if (tmp & BIT(DATA_OUT_PING_TOKEN_INTERRUPT) &&
690
691 ep->dev->gadget.speed == USB_SPEED_FULL) {
692 unsigned usec;
693
694 usec = 50;
695 handshake(statp, BIT(USB_OUT_PING_NAK_SENT),
696 BIT(USB_OUT_PING_NAK_SENT), usec);
697
698 }
699}
700
701
702
703
704
705
706
707
708static int read_fifo(struct net2280_ep *ep, struct net2280_request *req)
709{
710 struct net2280_ep_regs __iomem *regs = ep->regs;
711 u8 *buf = req->req.buf + req->req.actual;
712 unsigned count, tmp, is_short;
713 unsigned cleanup = 0, prevent = 0;
714
715
716
717
718 if (ep->dev->chiprev == 0x0100 &&
719 ep->dev->gadget.speed == USB_SPEED_FULL) {
720 udelay(1);
721 tmp = readl(&ep->regs->ep_stat);
722 if ((tmp & BIT(NAK_OUT_PACKETS)))
723 cleanup = 1;
724 else if ((tmp & BIT(FIFO_FULL))) {
725 start_out_naking(ep);
726 prevent = 1;
727 }
728
729 }
730
731
732
733
734 prefetchw(buf);
735 count = readl(®s->ep_avail);
736 if (unlikely(count == 0)) {
737 udelay(1);
738 tmp = readl(&ep->regs->ep_stat);
739 count = readl(®s->ep_avail);
740
741 if (count == 0 && (tmp & BIT(NAK_OUT_PACKETS)) == 0)
742 return 0;
743 }
744
745 tmp = req->req.length - req->req.actual;
746 if (count > tmp) {
747
748 if ((tmp % ep->ep.maxpacket) != 0) {
749 ep_err(ep->dev,
750 "%s out fifo %d bytes, expected %d\n",
751 ep->ep.name, count, tmp);
752 req->req.status = -EOVERFLOW;
753 cleanup = 1;
754
755
756
757 }
758 count = tmp;
759 }
760 req->req.actual += count;
761
762 is_short = (count == 0) || ((count % ep->ep.maxpacket) != 0);
763
764 ep_vdbg(ep->dev, "read %s fifo (OUT) %d bytes%s%s%s req %p %d/%d\n",
765 ep->ep.name, count, is_short ? " (short)" : "",
766 cleanup ? " flush" : "", prevent ? " nak" : "",
767 req, req->req.actual, req->req.length);
768
769 while (count >= 4) {
770 tmp = readl(®s->ep_data);
771 cpu_to_le32s(&tmp);
772 put_unaligned(tmp, (u32 *)buf);
773 buf += 4;
774 count -= 4;
775 }
776 if (count) {
777 tmp = readl(®s->ep_data);
778
779 do {
780 *buf++ = (u8) tmp;
781 tmp >>= 8;
782 } while (--count);
783 }
784 if (cleanup)
785 out_flush(ep);
786 if (prevent) {
787 writel(BIT(CLEAR_NAK_OUT_PACKETS), &ep->regs->ep_rsp);
788 (void) readl(&ep->regs->ep_rsp);
789 }
790
791 return is_short || req->req.actual == req->req.length;
792}
793
794
795static void fill_dma_desc(struct net2280_ep *ep,
796 struct net2280_request *req, int valid)
797{
798 struct net2280_dma *td = req->td;
799 u32 dmacount = req->req.length;
800
801
802
803
804
805
806 if (ep->is_in)
807 dmacount |= BIT(DMA_DIRECTION);
808 if ((!ep->is_in && (dmacount % ep->ep.maxpacket) != 0) ||
809 !(ep->dev->quirks & PLX_2280))
810 dmacount |= BIT(END_OF_CHAIN);
811
812 req->valid = valid;
813 if (valid)
814 dmacount |= BIT(VALID_BIT);
815 dmacount |= BIT(DMA_DONE_INTERRUPT_ENABLE);
816
817
818 td->dmaaddr = cpu_to_le32 (req->req.dma);
819
820
821 wmb();
822 td->dmacount = cpu_to_le32(dmacount);
823}
824
825static const u32 dmactl_default =
826 BIT(DMA_SCATTER_GATHER_DONE_INTERRUPT) |
827 BIT(DMA_CLEAR_COUNT_ENABLE) |
828
829 (POLL_100_USEC << DESCRIPTOR_POLLING_RATE) |
830 BIT(DMA_VALID_BIT_POLLING_ENABLE) |
831 BIT(DMA_VALID_BIT_ENABLE) |
832 BIT(DMA_SCATTER_GATHER_ENABLE) |
833
834 BIT(DMA_ENABLE);
835
836static inline void spin_stop_dma(struct net2280_dma_regs __iomem *dma)
837{
838 handshake(&dma->dmactl, BIT(DMA_ENABLE), 0, 50);
839}
840
841static inline void stop_dma(struct net2280_dma_regs __iomem *dma)
842{
843 writel(readl(&dma->dmactl) & ~BIT(DMA_ENABLE), &dma->dmactl);
844 spin_stop_dma(dma);
845}
846
847static void start_queue(struct net2280_ep *ep, u32 dmactl, u32 td_dma)
848{
849 struct net2280_dma_regs __iomem *dma = ep->dma;
850 unsigned int tmp = BIT(VALID_BIT) | (ep->is_in << DMA_DIRECTION);
851
852 if (!(ep->dev->quirks & PLX_2280))
853 tmp |= BIT(END_OF_CHAIN);
854
855 writel(tmp, &dma->dmacount);
856 writel(readl(&dma->dmastat), &dma->dmastat);
857
858 writel(td_dma, &dma->dmadesc);
859 if (ep->dev->quirks & PLX_PCIE)
860 dmactl |= BIT(DMA_REQUEST_OUTSTANDING);
861 writel(dmactl, &dma->dmactl);
862
863
864 (void) readl(&ep->dev->pci->pcimstctl);
865
866 writel(BIT(DMA_START), &dma->dmastat);
867}
868
869static void start_dma(struct net2280_ep *ep, struct net2280_request *req)
870{
871 u32 tmp;
872 struct net2280_dma_regs __iomem *dma = ep->dma;
873
874
875
876
877 WARN_ON(readl(&dma->dmactl) & BIT(DMA_ENABLE));
878 writel(0, &ep->dma->dmactl);
879
880
881 if (!ep->is_in && (readl(&ep->regs->ep_stat) &
882 BIT(NAK_OUT_PACKETS))) {
883 writel(BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT),
884 &ep->regs->ep_stat);
885
886 tmp = readl(&ep->regs->ep_avail);
887 if (tmp) {
888 writel(readl(&dma->dmastat), &dma->dmastat);
889
890
891 writel(req->req.dma, &dma->dmaaddr);
892 tmp = min(tmp, req->req.length);
893
894
895 req->td->dmacount = cpu_to_le32(req->req.length - tmp);
896 writel(BIT(DMA_DONE_INTERRUPT_ENABLE) | tmp,
897 &dma->dmacount);
898 req->td->dmadesc = 0;
899 req->valid = 1;
900
901 writel(BIT(DMA_ENABLE), &dma->dmactl);
902 writel(BIT(DMA_START), &dma->dmastat);
903 return;
904 }
905 stop_out_naking(ep);
906 }
907
908 tmp = dmactl_default;
909
910
911
912
913
914 if (ep->is_in) {
915 if (likely((req->req.length % ep->ep.maxpacket) ||
916 req->req.zero)){
917 tmp |= BIT(DMA_FIFO_VALIDATE);
918 ep->in_fifo_validate = 1;
919 } else
920 ep->in_fifo_validate = 0;
921 }
922
923
924 req->td->dmadesc = cpu_to_le32 (ep->td_dma);
925 fill_dma_desc(ep, req, 1);
926
927 req->td->dmacount |= cpu_to_le32(BIT(END_OF_CHAIN));
928
929 start_queue(ep, tmp, req->td_dma);
930}
931
932static inline void
933queue_dma(struct net2280_ep *ep, struct net2280_request *req, int valid)
934{
935 struct net2280_dma *end;
936 dma_addr_t tmp;
937
938
939 end = ep->dummy;
940 ep->dummy = req->td;
941 req->td = end;
942
943 tmp = ep->td_dma;
944 ep->td_dma = req->td_dma;
945 req->td_dma = tmp;
946
947 end->dmadesc = cpu_to_le32 (ep->td_dma);
948
949 fill_dma_desc(ep, req, valid);
950}
951
952static void
953done(struct net2280_ep *ep, struct net2280_request *req, int status)
954{
955 struct net2280 *dev;
956 unsigned stopped = ep->stopped;
957
958 list_del_init(&req->queue);
959
960 if (req->req.status == -EINPROGRESS)
961 req->req.status = status;
962 else
963 status = req->req.status;
964
965 dev = ep->dev;
966 if (ep->dma)
967 usb_gadget_unmap_request(&dev->gadget, &req->req, ep->is_in);
968
969 if (status && status != -ESHUTDOWN)
970 ep_vdbg(dev, "complete %s req %p stat %d len %u/%u\n",
971 ep->ep.name, &req->req, status,
972 req->req.actual, req->req.length);
973
974
975 ep->stopped = 1;
976 spin_unlock(&dev->lock);
977 usb_gadget_giveback_request(&ep->ep, &req->req);
978 spin_lock(&dev->lock);
979 ep->stopped = stopped;
980}
981
982
983
984static int
985net2280_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
986{
987 struct net2280_request *req;
988 struct net2280_ep *ep;
989 struct net2280 *dev;
990 unsigned long flags;
991 int ret = 0;
992
993
994
995
996 ep = container_of(_ep, struct net2280_ep, ep);
997 if (!_ep || (!ep->desc && ep->num != 0)) {
998 pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep);
999 return -EINVAL;
1000 }
1001 req = container_of(_req, struct net2280_request, req);
1002 if (!_req || !_req->complete || !_req->buf ||
1003 !list_empty(&req->queue)) {
1004 ret = -EINVAL;
1005 goto print_err;
1006 }
1007 if (_req->length > (~0 & DMA_BYTE_COUNT_MASK)) {
1008 ret = -EDOM;
1009 goto print_err;
1010 }
1011 dev = ep->dev;
1012 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
1013 ret = -ESHUTDOWN;
1014 goto print_err;
1015 }
1016
1017
1018 if (ep->dma && _req->length == 0) {
1019 ret = -EOPNOTSUPP;
1020 goto print_err;
1021 }
1022
1023
1024 if (ep->dma) {
1025 ret = usb_gadget_map_request(&dev->gadget, _req,
1026 ep->is_in);
1027 if (ret)
1028 goto print_err;
1029 }
1030
1031 ep_vdbg(dev, "%s queue req %p, len %d buf %p\n",
1032 _ep->name, _req, _req->length, _req->buf);
1033
1034 spin_lock_irqsave(&dev->lock, flags);
1035
1036 _req->status = -EINPROGRESS;
1037 _req->actual = 0;
1038
1039
1040 if (list_empty(&ep->queue) && !ep->stopped &&
1041 !((dev->quirks & PLX_PCIE) && ep->dma &&
1042 (readl(&ep->regs->ep_rsp) & BIT(CLEAR_ENDPOINT_HALT)))) {
1043
1044
1045 if (ep->dma)
1046 start_dma(ep, req);
1047 else {
1048
1049 if (ep->num == 0 && _req->length == 0) {
1050 allow_status(ep);
1051 done(ep, req, 0);
1052 ep_vdbg(dev, "%s status ack\n", ep->ep.name);
1053 goto done;
1054 }
1055
1056
1057 if (ep->is_in)
1058 write_fifo(ep, _req);
1059 else {
1060 u32 s;
1061
1062
1063 s = readl(&ep->regs->ep_stat);
1064 if ((s & BIT(FIFO_EMPTY)) == 0) {
1065
1066
1067
1068
1069
1070
1071 if (read_fifo(ep, req) &&
1072 ep->num == 0) {
1073 done(ep, req, 0);
1074 allow_status(ep);
1075
1076 req = NULL;
1077 } else if (read_fifo(ep, req) &&
1078 ep->num != 0) {
1079 done(ep, req, 0);
1080 req = NULL;
1081 } else
1082 s = readl(&ep->regs->ep_stat);
1083 }
1084
1085
1086 if (req && (s & BIT(NAK_OUT_PACKETS)))
1087 writel(BIT(CLEAR_NAK_OUT_PACKETS),
1088 &ep->regs->ep_rsp);
1089 }
1090 }
1091
1092 } else if (ep->dma) {
1093 int valid = 1;
1094
1095 if (ep->is_in) {
1096 int expect;
1097
1098
1099
1100
1101 expect = likely(req->req.zero ||
1102 (req->req.length % ep->ep.maxpacket));
1103 if (expect != ep->in_fifo_validate)
1104 valid = 0;
1105 }
1106 queue_dma(ep, req, valid);
1107
1108 }
1109
1110 ep->responded = 1;
1111 if (req)
1112 list_add_tail(&req->queue, &ep->queue);
1113done:
1114 spin_unlock_irqrestore(&dev->lock, flags);
1115
1116
1117 return ret;
1118
1119print_err:
1120 dev_err(&ep->dev->pdev->dev, "%s: error=%d\n", __func__, ret);
1121 return ret;
1122}
1123
1124static inline void
1125dma_done(struct net2280_ep *ep, struct net2280_request *req, u32 dmacount,
1126 int status)
1127{
1128 req->req.actual = req->req.length - (DMA_BYTE_COUNT_MASK & dmacount);
1129 done(ep, req, status);
1130}
1131
1132static int scan_dma_completions(struct net2280_ep *ep)
1133{
1134 int num_completed = 0;
1135
1136
1137
1138
1139 while (!list_empty(&ep->queue)) {
1140 struct net2280_request *req;
1141 u32 req_dma_count;
1142
1143 req = list_entry(ep->queue.next,
1144 struct net2280_request, queue);
1145 if (!req->valid)
1146 break;
1147 rmb();
1148 req_dma_count = le32_to_cpup(&req->td->dmacount);
1149 if ((req_dma_count & BIT(VALID_BIT)) != 0)
1150 break;
1151
1152
1153
1154
1155
1156 if (unlikely(req->td->dmadesc == 0)) {
1157
1158 u32 const ep_dmacount = readl(&ep->dma->dmacount);
1159
1160 if (ep_dmacount & DMA_BYTE_COUNT_MASK)
1161 break;
1162
1163 dma_done(ep, req, req_dma_count, 0);
1164 num_completed++;
1165 break;
1166 } else if (!ep->is_in &&
1167 (req->req.length % ep->ep.maxpacket) &&
1168 !(ep->dev->quirks & PLX_PCIE)) {
1169
1170 u32 const ep_stat = readl(&ep->regs->ep_stat);
1171
1172
1173
1174
1175 if ((ep_stat & BIT(NAK_OUT_PACKETS)) == 0) {
1176 ep_warn(ep->dev, "%s lost packet sync!\n",
1177 ep->ep.name);
1178 req->req.status = -EOVERFLOW;
1179 } else {
1180 u32 const ep_avail = readl(&ep->regs->ep_avail);
1181 if (ep_avail) {
1182
1183 ep->out_overflow = 1;
1184 ep_dbg(ep->dev,
1185 "%s dma, discard %d len %d\n",
1186 ep->ep.name, ep_avail,
1187 req->req.length);
1188 req->req.status = -EOVERFLOW;
1189 }
1190 }
1191 }
1192 dma_done(ep, req, req_dma_count, 0);
1193 num_completed++;
1194 }
1195
1196 return num_completed;
1197}
1198
1199static void restart_dma(struct net2280_ep *ep)
1200{
1201 struct net2280_request *req;
1202
1203 if (ep->stopped)
1204 return;
1205 req = list_entry(ep->queue.next, struct net2280_request, queue);
1206
1207 start_dma(ep, req);
1208}
1209
1210static void abort_dma(struct net2280_ep *ep)
1211{
1212
1213 if (likely(!list_empty(&ep->queue))) {
1214
1215 writel(BIT(DMA_ABORT), &ep->dma->dmastat);
1216 spin_stop_dma(ep->dma);
1217 } else
1218 stop_dma(ep->dma);
1219 scan_dma_completions(ep);
1220}
1221
1222
1223static void nuke(struct net2280_ep *ep)
1224{
1225 struct net2280_request *req;
1226
1227
1228 ep->stopped = 1;
1229 if (ep->dma)
1230 abort_dma(ep);
1231 while (!list_empty(&ep->queue)) {
1232 req = list_entry(ep->queue.next,
1233 struct net2280_request,
1234 queue);
1235 done(ep, req, -ESHUTDOWN);
1236 }
1237}
1238
1239
1240static int net2280_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1241{
1242 struct net2280_ep *ep;
1243 struct net2280_request *req;
1244 unsigned long flags;
1245 u32 dmactl;
1246 int stopped;
1247
1248 ep = container_of(_ep, struct net2280_ep, ep);
1249 if (!_ep || (!ep->desc && ep->num != 0) || !_req) {
1250 pr_err("%s: Invalid ep=%p or ep->desc or req=%p\n",
1251 __func__, _ep, _req);
1252 return -EINVAL;
1253 }
1254
1255 spin_lock_irqsave(&ep->dev->lock, flags);
1256 stopped = ep->stopped;
1257
1258
1259 dmactl = 0;
1260 ep->stopped = 1;
1261 if (ep->dma) {
1262 dmactl = readl(&ep->dma->dmactl);
1263
1264 stop_dma(ep->dma);
1265 scan_dma_completions(ep);
1266 }
1267
1268
1269 list_for_each_entry(req, &ep->queue, queue) {
1270 if (&req->req == _req)
1271 break;
1272 }
1273 if (&req->req != _req) {
1274 ep->stopped = stopped;
1275 spin_unlock_irqrestore(&ep->dev->lock, flags);
1276 ep_dbg(ep->dev, "%s: Request mismatch\n", __func__);
1277 return -EINVAL;
1278 }
1279
1280
1281 if (ep->queue.next == &req->queue) {
1282 if (ep->dma) {
1283 ep_dbg(ep->dev, "unlink (%s) dma\n", _ep->name);
1284 _req->status = -ECONNRESET;
1285 abort_dma(ep);
1286 if (likely(ep->queue.next == &req->queue)) {
1287
1288 req->td->dmacount = 0;
1289 dma_done(ep, req,
1290 readl(&ep->dma->dmacount),
1291 -ECONNRESET);
1292 }
1293 } else {
1294 ep_dbg(ep->dev, "unlink (%s) pio\n", _ep->name);
1295 done(ep, req, -ECONNRESET);
1296 }
1297 req = NULL;
1298 }
1299
1300 if (req)
1301 done(ep, req, -ECONNRESET);
1302 ep->stopped = stopped;
1303
1304 if (ep->dma) {
1305
1306 if (list_empty(&ep->queue))
1307 stop_dma(ep->dma);
1308 else if (!ep->stopped) {
1309
1310 if (req)
1311 writel(dmactl, &ep->dma->dmactl);
1312 else
1313 start_dma(ep, list_entry(ep->queue.next,
1314 struct net2280_request, queue));
1315 }
1316 }
1317
1318 spin_unlock_irqrestore(&ep->dev->lock, flags);
1319 return 0;
1320}
1321
1322
1323
1324static int net2280_fifo_status(struct usb_ep *_ep);
1325
1326static int
1327net2280_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged)
1328{
1329 struct net2280_ep *ep;
1330 unsigned long flags;
1331 int retval = 0;
1332
1333 ep = container_of(_ep, struct net2280_ep, ep);
1334 if (!_ep || (!ep->desc && ep->num != 0)) {
1335 pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep);
1336 return -EINVAL;
1337 }
1338 if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) {
1339 retval = -ESHUTDOWN;
1340 goto print_err;
1341 }
1342 if (ep->desc && (ep->desc->bmAttributes & 0x03)
1343 == USB_ENDPOINT_XFER_ISOC) {
1344 retval = -EINVAL;
1345 goto print_err;
1346 }
1347
1348 spin_lock_irqsave(&ep->dev->lock, flags);
1349 if (!list_empty(&ep->queue)) {
1350 retval = -EAGAIN;
1351 goto print_unlock;
1352 } else if (ep->is_in && value && net2280_fifo_status(_ep) != 0) {
1353 retval = -EAGAIN;
1354 goto print_unlock;
1355 } else {
1356 ep_vdbg(ep->dev, "%s %s %s\n", _ep->name,
1357 value ? "set" : "clear",
1358 wedged ? "wedge" : "halt");
1359
1360 if (value) {
1361 if (ep->num == 0)
1362 ep->dev->protocol_stall = 1;
1363 else
1364 set_halt(ep);
1365 if (wedged)
1366 ep->wedged = 1;
1367 } else {
1368 clear_halt(ep);
1369 if (ep->dev->quirks & PLX_PCIE &&
1370 !list_empty(&ep->queue) && ep->td_dma)
1371 restart_dma(ep);
1372 ep->wedged = 0;
1373 }
1374 (void) readl(&ep->regs->ep_rsp);
1375 }
1376 spin_unlock_irqrestore(&ep->dev->lock, flags);
1377
1378 return retval;
1379
1380print_unlock:
1381 spin_unlock_irqrestore(&ep->dev->lock, flags);
1382print_err:
1383 dev_err(&ep->dev->pdev->dev, "%s: error=%d\n", __func__, retval);
1384 return retval;
1385}
1386
1387static int net2280_set_halt(struct usb_ep *_ep, int value)
1388{
1389 return net2280_set_halt_and_wedge(_ep, value, 0);
1390}
1391
1392static int net2280_set_wedge(struct usb_ep *_ep)
1393{
1394 if (!_ep || _ep->name == ep0name) {
1395 pr_err("%s: Invalid ep=%p or ep0\n", __func__, _ep);
1396 return -EINVAL;
1397 }
1398 return net2280_set_halt_and_wedge(_ep, 1, 1);
1399}
1400
1401static int net2280_fifo_status(struct usb_ep *_ep)
1402{
1403 struct net2280_ep *ep;
1404 u32 avail;
1405
1406 ep = container_of(_ep, struct net2280_ep, ep);
1407 if (!_ep || (!ep->desc && ep->num != 0)) {
1408 pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep);
1409 return -ENODEV;
1410 }
1411 if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) {
1412 dev_err(&ep->dev->pdev->dev,
1413 "%s: Invalid driver=%p or speed=%d\n",
1414 __func__, ep->dev->driver, ep->dev->gadget.speed);
1415 return -ESHUTDOWN;
1416 }
1417
1418 avail = readl(&ep->regs->ep_avail) & (BIT(12) - 1);
1419 if (avail > ep->fifo_size) {
1420 dev_err(&ep->dev->pdev->dev, "%s: Fifo overflow\n", __func__);
1421 return -EOVERFLOW;
1422 }
1423 if (ep->is_in)
1424 avail = ep->fifo_size - avail;
1425 return avail;
1426}
1427
1428static void net2280_fifo_flush(struct usb_ep *_ep)
1429{
1430 struct net2280_ep *ep;
1431
1432 ep = container_of(_ep, struct net2280_ep, ep);
1433 if (!_ep || (!ep->desc && ep->num != 0)) {
1434 pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep);
1435 return;
1436 }
1437 if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) {
1438 dev_err(&ep->dev->pdev->dev,
1439 "%s: Invalid driver=%p or speed=%d\n",
1440 __func__, ep->dev->driver, ep->dev->gadget.speed);
1441 return;
1442 }
1443
1444 writel(BIT(FIFO_FLUSH), &ep->regs->ep_stat);
1445 (void) readl(&ep->regs->ep_rsp);
1446}
1447
1448static const struct usb_ep_ops net2280_ep_ops = {
1449 .enable = net2280_enable,
1450 .disable = net2280_disable,
1451
1452 .alloc_request = net2280_alloc_request,
1453 .free_request = net2280_free_request,
1454
1455 .queue = net2280_queue,
1456 .dequeue = net2280_dequeue,
1457
1458 .set_halt = net2280_set_halt,
1459 .set_wedge = net2280_set_wedge,
1460 .fifo_status = net2280_fifo_status,
1461 .fifo_flush = net2280_fifo_flush,
1462};
1463
1464
1465
1466static int net2280_get_frame(struct usb_gadget *_gadget)
1467{
1468 struct net2280 *dev;
1469 unsigned long flags;
1470 u16 retval;
1471
1472 if (!_gadget)
1473 return -ENODEV;
1474 dev = container_of(_gadget, struct net2280, gadget);
1475 spin_lock_irqsave(&dev->lock, flags);
1476 retval = get_idx_reg(dev->regs, REG_FRAME) & 0x03ff;
1477 spin_unlock_irqrestore(&dev->lock, flags);
1478 return retval;
1479}
1480
1481static int net2280_wakeup(struct usb_gadget *_gadget)
1482{
1483 struct net2280 *dev;
1484 u32 tmp;
1485 unsigned long flags;
1486
1487 if (!_gadget)
1488 return 0;
1489 dev = container_of(_gadget, struct net2280, gadget);
1490
1491 spin_lock_irqsave(&dev->lock, flags);
1492 tmp = readl(&dev->usb->usbctl);
1493 if (tmp & BIT(DEVICE_REMOTE_WAKEUP_ENABLE))
1494 writel(BIT(GENERATE_RESUME), &dev->usb->usbstat);
1495 spin_unlock_irqrestore(&dev->lock, flags);
1496
1497
1498 return 0;
1499}
1500
1501static int net2280_set_selfpowered(struct usb_gadget *_gadget, int value)
1502{
1503 struct net2280 *dev;
1504 u32 tmp;
1505 unsigned long flags;
1506
1507 if (!_gadget)
1508 return 0;
1509 dev = container_of(_gadget, struct net2280, gadget);
1510
1511 spin_lock_irqsave(&dev->lock, flags);
1512 tmp = readl(&dev->usb->usbctl);
1513 if (value) {
1514 tmp |= BIT(SELF_POWERED_STATUS);
1515 _gadget->is_selfpowered = 1;
1516 } else {
1517 tmp &= ~BIT(SELF_POWERED_STATUS);
1518 _gadget->is_selfpowered = 0;
1519 }
1520 writel(tmp, &dev->usb->usbctl);
1521 spin_unlock_irqrestore(&dev->lock, flags);
1522
1523 return 0;
1524}
1525
1526static int net2280_pullup(struct usb_gadget *_gadget, int is_on)
1527{
1528 struct net2280 *dev;
1529 u32 tmp;
1530 unsigned long flags;
1531
1532 if (!_gadget)
1533 return -ENODEV;
1534 dev = container_of(_gadget, struct net2280, gadget);
1535
1536 spin_lock_irqsave(&dev->lock, flags);
1537 tmp = readl(&dev->usb->usbctl);
1538 dev->softconnect = (is_on != 0);
1539 if (is_on) {
1540 ep0_start(dev);
1541 writel(tmp | BIT(USB_DETECT_ENABLE), &dev->usb->usbctl);
1542 } else {
1543 writel(tmp & ~BIT(USB_DETECT_ENABLE), &dev->usb->usbctl);
1544 stop_activity(dev, NULL);
1545 }
1546
1547 spin_unlock_irqrestore(&dev->lock, flags);
1548
1549 return 0;
1550}
1551
1552static struct usb_ep *net2280_match_ep(struct usb_gadget *_gadget,
1553 struct usb_endpoint_descriptor *desc,
1554 struct usb_ss_ep_comp_descriptor *ep_comp)
1555{
1556 char name[8];
1557 struct usb_ep *ep;
1558
1559 if (usb_endpoint_type(desc) == USB_ENDPOINT_XFER_INT) {
1560
1561 ep = gadget_find_ep_by_name(_gadget, "ep-e");
1562 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp))
1563 return ep;
1564 ep = gadget_find_ep_by_name(_gadget, "ep-f");
1565 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp))
1566 return ep;
1567 }
1568
1569
1570
1571
1572
1573 if (usb_endpoint_type(desc) == USB_ENDPOINT_XFER_INT &&
1574 usb_endpoint_dir_in(desc)) {
1575 ep = gadget_find_ep_by_name(_gadget, "ep2in");
1576 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp))
1577 return ep;
1578 ep = gadget_find_ep_by_name(_gadget, "ep4in");
1579 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp))
1580 return ep;
1581 } else if (usb_endpoint_type(desc) == USB_ENDPOINT_XFER_INT &&
1582 !usb_endpoint_dir_in(desc)) {
1583 ep = gadget_find_ep_by_name(_gadget, "ep1out");
1584 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp))
1585 return ep;
1586 ep = gadget_find_ep_by_name(_gadget, "ep3out");
1587 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp))
1588 return ep;
1589 } else if (usb_endpoint_type(desc) != USB_ENDPOINT_XFER_BULK &&
1590 usb_endpoint_dir_in(desc)) {
1591 ep = gadget_find_ep_by_name(_gadget, "ep1in");
1592 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp))
1593 return ep;
1594 ep = gadget_find_ep_by_name(_gadget, "ep3in");
1595 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp))
1596 return ep;
1597 } else if (usb_endpoint_type(desc) != USB_ENDPOINT_XFER_BULK &&
1598 !usb_endpoint_dir_in(desc)) {
1599 ep = gadget_find_ep_by_name(_gadget, "ep2out");
1600 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp))
1601 return ep;
1602 ep = gadget_find_ep_by_name(_gadget, "ep4out");
1603 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp))
1604 return ep;
1605 }
1606
1607
1608 snprintf(name, sizeof(name), "ep%d%s", usb_endpoint_num(desc),
1609 usb_endpoint_dir_in(desc) ? "in" : "out");
1610 ep = gadget_find_ep_by_name(_gadget, name);
1611 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp))
1612 return ep;
1613
1614 return NULL;
1615}
1616
1617static int net2280_start(struct usb_gadget *_gadget,
1618 struct usb_gadget_driver *driver);
1619static int net2280_stop(struct usb_gadget *_gadget);
1620static void net2280_async_callbacks(struct usb_gadget *_gadget, bool enable);
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 .udc_async_callbacks = net2280_async_callbacks,
1630 .match_ep = net2280_match_ep,
1631};
1632
1633
1634
1635#ifdef CONFIG_USB_GADGET_DEBUG_FILES
1636
1637
1638
1639
1640
1641
1642
1643static ssize_t function_show(struct device *_dev, struct device_attribute *attr,
1644 char *buf)
1645{
1646 struct net2280 *dev = dev_get_drvdata(_dev);
1647
1648 if (!dev->driver || !dev->driver->function ||
1649 strlen(dev->driver->function) > PAGE_SIZE)
1650 return 0;
1651 return scnprintf(buf, PAGE_SIZE, "%s\n", dev->driver->function);
1652}
1653static DEVICE_ATTR_RO(function);
1654
1655static ssize_t registers_show(struct device *_dev,
1656 struct device_attribute *attr, char *buf)
1657{
1658 struct net2280 *dev;
1659 char *next;
1660 unsigned size, t;
1661 unsigned long flags;
1662 int i;
1663 u32 t1, t2;
1664 const char *s;
1665
1666 dev = dev_get_drvdata(_dev);
1667 next = buf;
1668 size = PAGE_SIZE;
1669 spin_lock_irqsave(&dev->lock, flags);
1670
1671 if (dev->driver)
1672 s = dev->driver->driver.name;
1673 else
1674 s = "(none)";
1675
1676
1677 t = scnprintf(next, size, "%s version " DRIVER_VERSION
1678 ", chiprev %04x\n\n"
1679 "devinit %03x fifoctl %08x gadget '%s'\n"
1680 "pci irqenb0 %02x irqenb1 %08x "
1681 "irqstat0 %04x irqstat1 %08x\n",
1682 driver_name, dev->chiprev,
1683 readl(&dev->regs->devinit),
1684 readl(&dev->regs->fifoctl),
1685 s,
1686 readl(&dev->regs->pciirqenb0),
1687 readl(&dev->regs->pciirqenb1),
1688 readl(&dev->regs->irqstat0),
1689 readl(&dev->regs->irqstat1));
1690 size -= t;
1691 next += t;
1692
1693
1694 t1 = readl(&dev->usb->usbctl);
1695 t2 = readl(&dev->usb->usbstat);
1696 if (t1 & BIT(VBUS_PIN)) {
1697 if (t2 & BIT(HIGH_SPEED))
1698 s = "high speed";
1699 else if (dev->gadget.speed == USB_SPEED_UNKNOWN)
1700 s = "powered";
1701 else
1702 s = "full speed";
1703
1704 } else
1705 s = "not attached";
1706 t = scnprintf(next, size,
1707 "stdrsp %08x usbctl %08x usbstat %08x "
1708 "addr 0x%02x (%s)\n",
1709 readl(&dev->usb->stdrsp), t1, t2,
1710 readl(&dev->usb->ouraddr), s);
1711 size -= t;
1712 next += t;
1713
1714
1715
1716
1717
1718
1719 for (i = 0; i < dev->n_ep; i++) {
1720 struct net2280_ep *ep;
1721
1722 ep = &dev->ep[i];
1723 if (i && !ep->desc)
1724 continue;
1725
1726 t1 = readl(&ep->cfg->ep_cfg);
1727 t2 = readl(&ep->regs->ep_rsp) & 0xff;
1728 t = scnprintf(next, size,
1729 "\n%s\tcfg %05x rsp (%02x) %s%s%s%s%s%s%s%s"
1730 "irqenb %02x\n",
1731 ep->ep.name, t1, t2,
1732 (t2 & BIT(CLEAR_NAK_OUT_PACKETS))
1733 ? "NAK " : "",
1734 (t2 & BIT(CLEAR_EP_HIDE_STATUS_PHASE))
1735 ? "hide " : "",
1736 (t2 & BIT(CLEAR_EP_FORCE_CRC_ERROR))
1737 ? "CRC " : "",
1738 (t2 & BIT(CLEAR_INTERRUPT_MODE))
1739 ? "interrupt " : "",
1740 (t2 & BIT(CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE))
1741 ? "status " : "",
1742 (t2 & BIT(CLEAR_NAK_OUT_PACKETS_MODE))
1743 ? "NAKmode " : "",
1744 (t2 & BIT(CLEAR_ENDPOINT_TOGGLE))
1745 ? "DATA1 " : "DATA0 ",
1746 (t2 & BIT(CLEAR_ENDPOINT_HALT))
1747 ? "HALT " : "",
1748 readl(&ep->regs->ep_irqenb));
1749 size -= t;
1750 next += t;
1751
1752 t = scnprintf(next, size,
1753 "\tstat %08x avail %04x "
1754 "(ep%d%s-%s)%s\n",
1755 readl(&ep->regs->ep_stat),
1756 readl(&ep->regs->ep_avail),
1757 t1 & 0x0f, DIR_STRING(t1),
1758 type_string(t1 >> 8),
1759 ep->stopped ? "*" : "");
1760 size -= t;
1761 next += t;
1762
1763 if (!ep->dma)
1764 continue;
1765
1766 t = scnprintf(next, size,
1767 " dma\tctl %08x stat %08x count %08x\n"
1768 "\taddr %08x desc %08x\n",
1769 readl(&ep->dma->dmactl),
1770 readl(&ep->dma->dmastat),
1771 readl(&ep->dma->dmacount),
1772 readl(&ep->dma->dmaaddr),
1773 readl(&ep->dma->dmadesc));
1774 size -= t;
1775 next += t;
1776
1777 }
1778
1779
1780
1781
1782 t = scnprintf(next, size, "\nirqs: ");
1783 size -= t;
1784 next += t;
1785 for (i = 0; i < dev->n_ep; i++) {
1786 struct net2280_ep *ep;
1787
1788 ep = &dev->ep[i];
1789 if (i && !ep->irqs)
1790 continue;
1791 t = scnprintf(next, size, " %s/%lu", ep->ep.name, ep->irqs);
1792 size -= t;
1793 next += t;
1794
1795 }
1796 t = scnprintf(next, size, "\n");
1797 size -= t;
1798 next += t;
1799
1800 spin_unlock_irqrestore(&dev->lock, flags);
1801
1802 return PAGE_SIZE - size;
1803}
1804static DEVICE_ATTR_RO(registers);
1805
1806static ssize_t queues_show(struct device *_dev, struct device_attribute *attr,
1807 char *buf)
1808{
1809 struct net2280 *dev;
1810 char *next;
1811 unsigned size;
1812 unsigned long flags;
1813 int i;
1814
1815 dev = dev_get_drvdata(_dev);
1816 next = buf;
1817 size = PAGE_SIZE;
1818 spin_lock_irqsave(&dev->lock, flags);
1819
1820 for (i = 0; i < dev->n_ep; i++) {
1821 struct net2280_ep *ep = &dev->ep[i];
1822 struct net2280_request *req;
1823 int t;
1824
1825 if (i != 0) {
1826 const struct usb_endpoint_descriptor *d;
1827
1828 d = ep->desc;
1829 if (!d)
1830 continue;
1831 t = d->bEndpointAddress;
1832 t = scnprintf(next, size,
1833 "\n%s (ep%d%s-%s) max %04x %s fifo %d\n",
1834 ep->ep.name, t & USB_ENDPOINT_NUMBER_MASK,
1835 (t & USB_DIR_IN) ? "in" : "out",
1836 type_string(d->bmAttributes),
1837 usb_endpoint_maxp(d),
1838 ep->dma ? "dma" : "pio", ep->fifo_size
1839 );
1840 } else
1841 t = scnprintf(next, size, "ep0 max 64 pio %s\n",
1842 ep->is_in ? "in" : "out");
1843 if (t <= 0 || t > size)
1844 goto done;
1845 size -= t;
1846 next += t;
1847
1848 if (list_empty(&ep->queue)) {
1849 t = scnprintf(next, size, "\t(nothing queued)\n");
1850 if (t <= 0 || t > size)
1851 goto done;
1852 size -= t;
1853 next += t;
1854 continue;
1855 }
1856 list_for_each_entry(req, &ep->queue, queue) {
1857 if (ep->dma && req->td_dma == readl(&ep->dma->dmadesc))
1858 t = scnprintf(next, size,
1859 "\treq %p len %d/%d "
1860 "buf %p (dmacount %08x)\n",
1861 &req->req, req->req.actual,
1862 req->req.length, req->req.buf,
1863 readl(&ep->dma->dmacount));
1864 else
1865 t = scnprintf(next, size,
1866 "\treq %p len %d/%d buf %p\n",
1867 &req->req, req->req.actual,
1868 req->req.length, req->req.buf);
1869 if (t <= 0 || t > size)
1870 goto done;
1871 size -= t;
1872 next += t;
1873
1874 if (ep->dma) {
1875 struct net2280_dma *td;
1876
1877 td = req->td;
1878 t = scnprintf(next, size, "\t td %08x "
1879 " count %08x buf %08x desc %08x\n",
1880 (u32) req->td_dma,
1881 le32_to_cpu(td->dmacount),
1882 le32_to_cpu(td->dmaaddr),
1883 le32_to_cpu(td->dmadesc));
1884 if (t <= 0 || t > size)
1885 goto done;
1886 size -= t;
1887 next += t;
1888 }
1889 }
1890 }
1891
1892done:
1893 spin_unlock_irqrestore(&dev->lock, flags);
1894 return PAGE_SIZE - size;
1895}
1896static DEVICE_ATTR_RO(queues);
1897
1898
1899#else
1900
1901#define device_create_file(a, b) (0)
1902#define device_remove_file(a, b) do { } while (0)
1903
1904#endif
1905
1906
1907
1908
1909
1910
1911
1912static void set_fifo_mode(struct net2280 *dev, int mode)
1913{
1914
1915 writel((0xffff << PCI_BASE2_RANGE) | mode, &dev->regs->fifoctl);
1916
1917
1918 INIT_LIST_HEAD(&dev->gadget.ep_list);
1919 list_add_tail(&dev->ep[1].ep.ep_list, &dev->gadget.ep_list);
1920 list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list);
1921 switch (mode) {
1922 case 0:
1923 list_add_tail(&dev->ep[3].ep.ep_list, &dev->gadget.ep_list);
1924 list_add_tail(&dev->ep[4].ep.ep_list, &dev->gadget.ep_list);
1925 dev->ep[1].fifo_size = dev->ep[2].fifo_size = 1024;
1926 break;
1927 case 1:
1928 dev->ep[1].fifo_size = dev->ep[2].fifo_size = 2048;
1929 break;
1930 case 2:
1931 list_add_tail(&dev->ep[3].ep.ep_list, &dev->gadget.ep_list);
1932 dev->ep[1].fifo_size = 2048;
1933 dev->ep[2].fifo_size = 1024;
1934 break;
1935 }
1936
1937 list_add_tail(&dev->ep[5].ep.ep_list, &dev->gadget.ep_list);
1938 list_add_tail(&dev->ep[6].ep.ep_list, &dev->gadget.ep_list);
1939}
1940
1941static void defect7374_disable_data_eps(struct net2280 *dev)
1942{
1943
1944
1945
1946
1947
1948 struct net2280_ep *ep;
1949 int i;
1950 unsigned char ep_sel;
1951 u32 tmp_reg;
1952
1953 for (i = 1; i < 5; i++) {
1954 ep = &dev->ep[i];
1955 writel(i, &ep->cfg->ep_cfg);
1956 }
1957
1958
1959 for (i = 0; i < 6; i++)
1960 writel(0, &dev->dep[i].dep_cfg);
1961
1962 for (ep_sel = 0; ep_sel <= 21; ep_sel++) {
1963
1964 tmp_reg = readl(&dev->plregs->pl_ep_ctrl);
1965 writel(((tmp_reg & ~0x1f) | ep_sel), &dev->plregs->pl_ep_ctrl);
1966
1967 if (ep_sel < 2 || (ep_sel > 9 && ep_sel < 14) ||
1968 ep_sel == 18 || ep_sel == 20)
1969 continue;
1970
1971
1972 tmp_reg = readl(&dev->plregs->pl_ep_cfg_4);
1973 tmp_reg &= ~BIT(NON_CTRL_IN_TOLERATE_BAD_DIR);
1974 writel(tmp_reg, &dev->plregs->pl_ep_cfg_4);
1975 tmp_reg = readl(&dev->plregs->pl_ep_ctrl);
1976 tmp_reg |= BIT(EP_INITIALIZED);
1977 writel(tmp_reg, &dev->plregs->pl_ep_ctrl);
1978 }
1979}
1980
1981static void defect7374_enable_data_eps_zero(struct net2280 *dev)
1982{
1983 u32 tmp = 0, tmp_reg;
1984 u32 scratch;
1985 int i;
1986 unsigned char ep_sel;
1987
1988 scratch = get_idx_reg(dev->regs, SCRATCH);
1989
1990 WARN_ON((scratch & (0xf << DEFECT7374_FSM_FIELD))
1991 == DEFECT7374_FSM_SS_CONTROL_READ);
1992
1993 scratch &= ~(0xf << DEFECT7374_FSM_FIELD);
1994
1995 ep_warn(dev, "Operate Defect 7374 workaround soft this time");
1996 ep_warn(dev, "It will operate on cold-reboot and SS connect");
1997
1998
1999 tmp = ((0 << ENDPOINT_NUMBER) | BIT(ENDPOINT_DIRECTION) |
2000 (2 << OUT_ENDPOINT_TYPE) | (2 << IN_ENDPOINT_TYPE) |
2001 ((dev->enhanced_mode) ?
2002 BIT(OUT_ENDPOINT_ENABLE) | BIT(IN_ENDPOINT_ENABLE) :
2003 BIT(ENDPOINT_ENABLE)));
2004
2005 for (i = 1; i < 5; i++)
2006 writel(tmp, &dev->ep[i].cfg->ep_cfg);
2007
2008
2009 tmp = ((0 << ENDPOINT_NUMBER) | BIT(ENDPOINT_ENABLE));
2010 writel(tmp, &dev->dep[1].dep_cfg);
2011 writel(tmp, &dev->dep[3].dep_cfg);
2012 writel(tmp, &dev->dep[4].dep_cfg);
2013 writel(tmp, &dev->dep[5].dep_cfg);
2014
2015
2016
2017 for (ep_sel = 0; ep_sel <= 21; ep_sel++) {
2018
2019 tmp_reg = readl(&dev->plregs->pl_ep_ctrl);
2020 writel(((tmp_reg & ~0x1f) | ep_sel),
2021 &dev->plregs->pl_ep_ctrl);
2022
2023 if (ep_sel == 1) {
2024 tmp =
2025 (readl(&dev->plregs->pl_ep_ctrl) |
2026 BIT(CLEAR_ACK_ERROR_CODE) | 0);
2027 writel(tmp, &dev->plregs->pl_ep_ctrl);
2028 continue;
2029 }
2030
2031 if (ep_sel == 0 || (ep_sel > 9 && ep_sel < 14) ||
2032 ep_sel == 18 || ep_sel == 20)
2033 continue;
2034
2035 tmp = (readl(&dev->plregs->pl_ep_cfg_4) |
2036 BIT(NON_CTRL_IN_TOLERATE_BAD_DIR) | 0);
2037 writel(tmp, &dev->plregs->pl_ep_cfg_4);
2038
2039 tmp = readl(&dev->plregs->pl_ep_ctrl) &
2040 ~BIT(EP_INITIALIZED);
2041 writel(tmp, &dev->plregs->pl_ep_ctrl);
2042
2043 }
2044
2045
2046
2047
2048 scratch |= DEFECT7374_FSM_WAITING_FOR_CONTROL_READ;
2049 set_idx_reg(dev->regs, SCRATCH, scratch);
2050
2051}
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062static void usb_reset_228x(struct net2280 *dev)
2063{
2064 u32 tmp;
2065
2066 dev->gadget.speed = USB_SPEED_UNKNOWN;
2067 (void) readl(&dev->usb->usbctl);
2068
2069 net2280_led_init(dev);
2070
2071
2072 writel(0, &dev->usb->stdrsp);
2073 writel(0, &dev->regs->pciirqenb0);
2074 writel(0, &dev->regs->pciirqenb1);
2075
2076
2077 for (tmp = 0; tmp < 4; tmp++) {
2078 struct net2280_ep *ep = &dev->ep[tmp + 1];
2079 if (ep->dma)
2080 abort_dma(ep);
2081 }
2082
2083 writel(~0, &dev->regs->irqstat0),
2084 writel(~(u32)BIT(SUSPEND_REQUEST_INTERRUPT), &dev->regs->irqstat1),
2085
2086
2087 tmp = readl(&dev->regs->devinit) |
2088 BIT(PCI_ENABLE) |
2089 BIT(FIFO_SOFT_RESET) |
2090 BIT(USB_SOFT_RESET) |
2091 BIT(M8051_RESET);
2092 writel(tmp, &dev->regs->devinit);
2093
2094
2095 set_fifo_mode(dev, (fifo_mode <= 2) ? fifo_mode : 0);
2096}
2097
2098static void usb_reset_338x(struct net2280 *dev)
2099{
2100 u32 tmp;
2101
2102 dev->gadget.speed = USB_SPEED_UNKNOWN;
2103 (void)readl(&dev->usb->usbctl);
2104
2105 net2280_led_init(dev);
2106
2107 if (dev->bug7734_patched) {
2108
2109 writel(0, &dev->usb->stdrsp);
2110 writel(0, &dev->regs->pciirqenb0);
2111 writel(0, &dev->regs->pciirqenb1);
2112 }
2113
2114
2115 for (tmp = 0; tmp < 4; tmp++) {
2116 struct net2280_ep *ep = &dev->ep[tmp + 1];
2117 struct net2280_dma_regs __iomem *dma;
2118
2119 if (ep->dma) {
2120 abort_dma(ep);
2121 } else {
2122 dma = &dev->dma[tmp];
2123 writel(BIT(DMA_ABORT), &dma->dmastat);
2124 writel(0, &dma->dmactl);
2125 }
2126 }
2127
2128 writel(~0, &dev->regs->irqstat0), writel(~0, &dev->regs->irqstat1);
2129
2130 if (dev->bug7734_patched) {
2131
2132 tmp = readl(&dev->regs->devinit) |
2133 BIT(PCI_ENABLE) |
2134 BIT(FIFO_SOFT_RESET) |
2135 BIT(USB_SOFT_RESET) |
2136 BIT(M8051_RESET);
2137
2138 writel(tmp, &dev->regs->devinit);
2139 }
2140
2141
2142 INIT_LIST_HEAD(&dev->gadget.ep_list);
2143
2144 for (tmp = 1; tmp < dev->n_ep; tmp++)
2145 list_add_tail(&dev->ep[tmp].ep.ep_list, &dev->gadget.ep_list);
2146
2147}
2148
2149static void usb_reset(struct net2280 *dev)
2150{
2151 if (dev->quirks & PLX_LEGACY)
2152 return usb_reset_228x(dev);
2153 return usb_reset_338x(dev);
2154}
2155
2156static void usb_reinit_228x(struct net2280 *dev)
2157{
2158 u32 tmp;
2159
2160
2161 for (tmp = 0; tmp < 7; tmp++) {
2162 struct net2280_ep *ep = &dev->ep[tmp];
2163
2164 ep->ep.name = ep_info_dft[tmp].name;
2165 ep->ep.caps = ep_info_dft[tmp].caps;
2166 ep->dev = dev;
2167 ep->num = tmp;
2168
2169 if (tmp > 0 && tmp <= 4) {
2170 ep->fifo_size = 1024;
2171 ep->dma = &dev->dma[tmp - 1];
2172 } else
2173 ep->fifo_size = 64;
2174 ep->regs = &dev->epregs[tmp];
2175 ep->cfg = &dev->epregs[tmp];
2176 ep_reset_228x(dev->regs, ep);
2177 }
2178 usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 64);
2179 usb_ep_set_maxpacket_limit(&dev->ep[5].ep, 64);
2180 usb_ep_set_maxpacket_limit(&dev->ep[6].ep, 64);
2181
2182 dev->gadget.ep0 = &dev->ep[0].ep;
2183 dev->ep[0].stopped = 0;
2184 INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
2185
2186
2187
2188
2189 for (tmp = 0; tmp < 5; tmp++)
2190 writel(EP_DONTUSE, &dev->dep[tmp].dep_cfg);
2191}
2192
2193static void usb_reinit_338x(struct net2280 *dev)
2194{
2195 int i;
2196 u32 tmp, val;
2197 static const u32 ne[9] = { 0, 1, 2, 3, 4, 1, 2, 3, 4 };
2198 static const u32 ep_reg_addr[9] = { 0x00, 0xC0, 0x00, 0xC0, 0x00,
2199 0x00, 0xC0, 0x00, 0xC0 };
2200
2201
2202 for (i = 0; i < dev->n_ep; i++) {
2203 struct net2280_ep *ep = &dev->ep[i];
2204
2205 ep->ep.name = dev->enhanced_mode ? ep_info_adv[i].name :
2206 ep_info_dft[i].name;
2207 ep->ep.caps = dev->enhanced_mode ? ep_info_adv[i].caps :
2208 ep_info_dft[i].caps;
2209 ep->dev = dev;
2210 ep->num = i;
2211
2212 if (i > 0 && i <= 4)
2213 ep->dma = &dev->dma[i - 1];
2214
2215 if (dev->enhanced_mode) {
2216 ep->cfg = &dev->epregs[ne[i]];
2217
2218
2219
2220
2221 if (i > 0 && i < 5)
2222 writel(ne[i], &ep->cfg->ep_cfg);
2223 ep->regs = (struct net2280_ep_regs __iomem *)
2224 (((void __iomem *)&dev->epregs[ne[i]]) +
2225 ep_reg_addr[i]);
2226 } else {
2227 ep->cfg = &dev->epregs[i];
2228 ep->regs = &dev->epregs[i];
2229 }
2230
2231 ep->fifo_size = (i != 0) ? 2048 : 512;
2232
2233 ep_reset_338x(dev->regs, ep);
2234 }
2235 usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 512);
2236
2237 dev->gadget.ep0 = &dev->ep[0].ep;
2238 dev->ep[0].stopped = 0;
2239
2240
2241 if (dev->bug7734_patched) {
2242 tmp = readl(&dev->usb_ext->usbctl2) &
2243 ~(BIT(U1_ENABLE) | BIT(U2_ENABLE) | BIT(LTM_ENABLE));
2244 writel(tmp, &dev->usb_ext->usbctl2);
2245 }
2246
2247
2248 val = readl(&dev->llregs->ll_lfps_5);
2249 val &= ~(0xf << TIMER_LFPS_6US);
2250 val |= 0x5 << TIMER_LFPS_6US;
2251 writel(val, &dev->llregs->ll_lfps_5);
2252
2253 val = readl(&dev->llregs->ll_lfps_6);
2254 val &= ~(0xffff << TIMER_LFPS_80US);
2255 val |= 0x0100 << TIMER_LFPS_80US;
2256 writel(val, &dev->llregs->ll_lfps_6);
2257
2258
2259
2260
2261
2262
2263 val = readl(&dev->llregs->ll_tsn_counters_2);
2264 val &= ~(0x1f << HOT_TX_NORESET_TS2);
2265 val |= 0x10 << HOT_TX_NORESET_TS2;
2266 writel(val, &dev->llregs->ll_tsn_counters_2);
2267
2268 val = readl(&dev->llregs->ll_tsn_counters_3);
2269 val &= ~(0x1f << HOT_RX_RESET_TS2);
2270 val |= 0x3 << HOT_RX_RESET_TS2;
2271 writel(val, &dev->llregs->ll_tsn_counters_3);
2272
2273
2274
2275
2276
2277
2278
2279 val = readl(&dev->llregs->ll_lfps_timers_2);
2280 writel((val & 0xffff0000) | LFPS_TIMERS_2_WORKAROUND_VALUE,
2281 &dev->llregs->ll_lfps_timers_2);
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291 val = readl(&dev->llregs->ll_tsn_chicken_bit);
2292 val |= BIT(RECOVERY_IDLE_TO_RECOVER_FMW);
2293 writel(val, &dev->llregs->ll_tsn_chicken_bit);
2294
2295 INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
2296
2297
2298 writel(0x0D, &dev->dep[0].dep_cfg);
2299 writel(0x0D, &dev->dep[1].dep_cfg);
2300 writel(0x0E, &dev->dep[2].dep_cfg);
2301 writel(0x0E, &dev->dep[3].dep_cfg);
2302 writel(0x0F, &dev->dep[4].dep_cfg);
2303 writel(0x0C, &dev->dep[5].dep_cfg);
2304}
2305
2306static void usb_reinit(struct net2280 *dev)
2307{
2308 if (dev->quirks & PLX_LEGACY)
2309 return usb_reinit_228x(dev);
2310 return usb_reinit_338x(dev);
2311}
2312
2313static void ep0_start_228x(struct net2280 *dev)
2314{
2315 writel(BIT(CLEAR_EP_HIDE_STATUS_PHASE) |
2316 BIT(CLEAR_NAK_OUT_PACKETS) |
2317 BIT(CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE),
2318 &dev->epregs[0].ep_rsp);
2319
2320
2321
2322
2323
2324
2325
2326 writel(BIT(SET_TEST_MODE) |
2327 BIT(SET_ADDRESS) |
2328 BIT(DEVICE_SET_CLEAR_DEVICE_REMOTE_WAKEUP) |
2329 BIT(GET_DEVICE_STATUS) |
2330 BIT(GET_INTERFACE_STATUS),
2331 &dev->usb->stdrsp);
2332 writel(BIT(USB_ROOT_PORT_WAKEUP_ENABLE) |
2333 BIT(SELF_POWERED_USB_DEVICE) |
2334 BIT(REMOTE_WAKEUP_SUPPORT) |
2335 (dev->softconnect << USB_DETECT_ENABLE) |
2336 BIT(SELF_POWERED_STATUS),
2337 &dev->usb->usbctl);
2338
2339
2340 writel(BIT(SETUP_PACKET_INTERRUPT_ENABLE) |
2341 BIT(ENDPOINT_0_INTERRUPT_ENABLE),
2342 &dev->regs->pciirqenb0);
2343 writel(BIT(PCI_INTERRUPT_ENABLE) |
2344 BIT(PCI_MASTER_ABORT_RECEIVED_INTERRUPT_ENABLE) |
2345 BIT(PCI_TARGET_ABORT_RECEIVED_INTERRUPT_ENABLE) |
2346 BIT(PCI_RETRY_ABORT_INTERRUPT_ENABLE) |
2347 BIT(VBUS_INTERRUPT_ENABLE) |
2348 BIT(ROOT_PORT_RESET_INTERRUPT_ENABLE) |
2349 BIT(SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE),
2350 &dev->regs->pciirqenb1);
2351
2352
2353 (void) readl(&dev->usb->usbctl);
2354}
2355
2356static void ep0_start_338x(struct net2280 *dev)
2357{
2358
2359 if (dev->bug7734_patched)
2360 writel(BIT(CLEAR_NAK_OUT_PACKETS_MODE) |
2361 BIT(SET_EP_HIDE_STATUS_PHASE),
2362 &dev->epregs[0].ep_rsp);
2363
2364
2365
2366
2367
2368
2369
2370 writel(BIT(SET_ISOCHRONOUS_DELAY) |
2371 BIT(SET_SEL) |
2372 BIT(SET_TEST_MODE) |
2373 BIT(SET_ADDRESS) |
2374 BIT(GET_INTERFACE_STATUS) |
2375 BIT(GET_DEVICE_STATUS),
2376 &dev->usb->stdrsp);
2377 dev->wakeup_enable = 1;
2378 writel(BIT(USB_ROOT_PORT_WAKEUP_ENABLE) |
2379 (dev->softconnect << USB_DETECT_ENABLE) |
2380 BIT(DEVICE_REMOTE_WAKEUP_ENABLE),
2381 &dev->usb->usbctl);
2382
2383
2384 writel(BIT(SETUP_PACKET_INTERRUPT_ENABLE) |
2385 BIT(ENDPOINT_0_INTERRUPT_ENABLE),
2386 &dev->regs->pciirqenb0);
2387 writel(BIT(PCI_INTERRUPT_ENABLE) |
2388 BIT(ROOT_PORT_RESET_INTERRUPT_ENABLE) |
2389 BIT(SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE) |
2390 BIT(VBUS_INTERRUPT_ENABLE),
2391 &dev->regs->pciirqenb1);
2392
2393
2394 (void)readl(&dev->usb->usbctl);
2395}
2396
2397static void ep0_start(struct net2280 *dev)
2398{
2399 if (dev->quirks & PLX_LEGACY)
2400 return ep0_start_228x(dev);
2401 return ep0_start_338x(dev);
2402}
2403
2404
2405
2406
2407
2408
2409
2410static int net2280_start(struct usb_gadget *_gadget,
2411 struct usb_gadget_driver *driver)
2412{
2413 struct net2280 *dev;
2414 int retval;
2415 unsigned i;
2416
2417
2418
2419
2420
2421 if (!driver || driver->max_speed < USB_SPEED_HIGH ||
2422 !driver->setup)
2423 return -EINVAL;
2424
2425 dev = container_of(_gadget, struct net2280, gadget);
2426
2427 for (i = 0; i < dev->n_ep; i++)
2428 dev->ep[i].irqs = 0;
2429
2430
2431 driver->driver.bus = NULL;
2432 dev->driver = driver;
2433
2434 retval = device_create_file(&dev->pdev->dev, &dev_attr_function);
2435 if (retval)
2436 goto err_unbind;
2437 retval = device_create_file(&dev->pdev->dev, &dev_attr_queues);
2438 if (retval)
2439 goto err_func;
2440
2441
2442
2443
2444 net2280_led_active(dev, 1);
2445
2446 if ((dev->quirks & PLX_PCIE) && !dev->bug7734_patched)
2447 defect7374_enable_data_eps_zero(dev);
2448
2449 ep0_start(dev);
2450
2451
2452 return 0;
2453
2454err_func:
2455 device_remove_file(&dev->pdev->dev, &dev_attr_function);
2456err_unbind:
2457 dev->driver = NULL;
2458 return retval;
2459}
2460
2461static void stop_activity(struct net2280 *dev, struct usb_gadget_driver *driver)
2462{
2463 int i;
2464
2465
2466 if (dev->gadget.speed == USB_SPEED_UNKNOWN)
2467 driver = NULL;
2468
2469
2470
2471
2472 usb_reset(dev);
2473 for (i = 0; i < dev->n_ep; i++)
2474 nuke(&dev->ep[i]);
2475
2476
2477 if (dev->async_callbacks && driver) {
2478 spin_unlock(&dev->lock);
2479 driver->disconnect(&dev->gadget);
2480 spin_lock(&dev->lock);
2481 }
2482
2483 usb_reinit(dev);
2484}
2485
2486static int net2280_stop(struct usb_gadget *_gadget)
2487{
2488 struct net2280 *dev;
2489 unsigned long flags;
2490
2491 dev = container_of(_gadget, struct net2280, gadget);
2492
2493 spin_lock_irqsave(&dev->lock, flags);
2494 stop_activity(dev, NULL);
2495 spin_unlock_irqrestore(&dev->lock, flags);
2496
2497 net2280_led_active(dev, 0);
2498
2499 device_remove_file(&dev->pdev->dev, &dev_attr_function);
2500 device_remove_file(&dev->pdev->dev, &dev_attr_queues);
2501
2502 dev->driver = NULL;
2503
2504 return 0;
2505}
2506
2507static void net2280_async_callbacks(struct usb_gadget *_gadget, bool enable)
2508{
2509 struct net2280 *dev = container_of(_gadget, struct net2280, gadget);
2510
2511 spin_lock_irq(&dev->lock);
2512 dev->async_callbacks = enable;
2513 spin_unlock_irq(&dev->lock);
2514}
2515
2516
2517
2518
2519
2520
2521
2522static void handle_ep_small(struct net2280_ep *ep)
2523{
2524 struct net2280_request *req;
2525 u32 t;
2526
2527 int mode = 1;
2528
2529 if (!list_empty(&ep->queue))
2530 req = list_entry(ep->queue.next,
2531 struct net2280_request, queue);
2532 else
2533 req = NULL;
2534
2535
2536 t = readl(&ep->regs->ep_stat);
2537 ep->irqs++;
2538
2539 ep_vdbg(ep->dev, "%s ack ep_stat %08x, req %p\n",
2540 ep->ep.name, t, req ? &req->req : NULL);
2541
2542 if (!ep->is_in || (ep->dev->quirks & PLX_2280))
2543 writel(t & ~BIT(NAK_OUT_PACKETS), &ep->regs->ep_stat);
2544 else
2545
2546 writel(t, &ep->regs->ep_stat);
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558 if (unlikely(ep->num == 0)) {
2559 if (ep->is_in) {
2560
2561 if (t & BIT(DATA_OUT_PING_TOKEN_INTERRUPT)) {
2562 if (ep->dev->protocol_stall) {
2563 ep->stopped = 1;
2564 set_halt(ep);
2565 }
2566 if (!req)
2567 allow_status(ep);
2568 mode = 2;
2569
2570 } else if (t & BIT(DATA_IN_TOKEN_INTERRUPT)) {
2571 if (ep->dev->protocol_stall) {
2572 ep->stopped = 1;
2573 set_halt(ep);
2574 mode = 2;
2575 } else if (ep->responded &&
2576 !req && !ep->stopped)
2577 write_fifo(ep, NULL);
2578 }
2579 } else {
2580
2581 if (t & BIT(DATA_IN_TOKEN_INTERRUPT)) {
2582 if (ep->dev->protocol_stall) {
2583 ep->stopped = 1;
2584 set_halt(ep);
2585 }
2586 mode = 2;
2587
2588 } else if (((t & BIT(DATA_OUT_PING_TOKEN_INTERRUPT)) &&
2589 req &&
2590 req->req.actual == req->req.length) ||
2591 (ep->responded && !req)) {
2592 ep->dev->protocol_stall = 1;
2593 set_halt(ep);
2594 ep->stopped = 1;
2595 if (req)
2596 done(ep, req, -EOVERFLOW);
2597 req = NULL;
2598 }
2599 }
2600 }
2601
2602 if (unlikely(!req))
2603 return;
2604
2605
2606 if (likely(ep->dma)) {
2607 if (t & BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT)) {
2608 struct net2280_request *stuck_req = NULL;
2609 int stopped = ep->stopped;
2610 int num_completed;
2611 int stuck = 0;
2612 u32 count;
2613
2614
2615
2616
2617
2618 ep->stopped = 1;
2619 for (count = 0; ; t = readl(&ep->regs->ep_stat)) {
2620
2621
2622
2623
2624 num_completed = scan_dma_completions(ep);
2625 if (unlikely(list_empty(&ep->queue) ||
2626 ep->out_overflow)) {
2627 req = NULL;
2628 break;
2629 }
2630 req = list_entry(ep->queue.next,
2631 struct net2280_request, queue);
2632
2633
2634
2635
2636 if (likely(t & BIT(FIFO_EMPTY))) {
2637 count = readl(&ep->dma->dmacount);
2638 count &= DMA_BYTE_COUNT_MASK;
2639 if (readl(&ep->dma->dmadesc)
2640 != req->td_dma)
2641 req = NULL;
2642 break;
2643 }
2644
2645
2646
2647
2648 if (num_completed == 0) {
2649 if (stuck_req == req &&
2650 readl(&ep->dma->dmadesc) !=
2651 req->td_dma && stuck++ > 5) {
2652 count = readl(
2653 &ep->dma->dmacount);
2654 count &= DMA_BYTE_COUNT_MASK;
2655 req = NULL;
2656 ep_dbg(ep->dev, "%s escape stuck %d, count %u\n",
2657 ep->ep.name, stuck,
2658 count);
2659 break;
2660 } else if (stuck_req != req) {
2661 stuck_req = req;
2662 stuck = 0;
2663 }
2664 } else {
2665 stuck_req = NULL;
2666 stuck = 0;
2667 }
2668
2669 udelay(1);
2670 }
2671
2672
2673 writel(BIT(DMA_ABORT), &ep->dma->dmastat);
2674 spin_stop_dma(ep->dma);
2675
2676 if (likely(req)) {
2677 req->td->dmacount = 0;
2678 t = readl(&ep->regs->ep_avail);
2679 dma_done(ep, req, count,
2680 (ep->out_overflow || t)
2681 ? -EOVERFLOW : 0);
2682 }
2683
2684
2685 if (unlikely(ep->out_overflow ||
2686 (ep->dev->chiprev == 0x0100 &&
2687 ep->dev->gadget.speed
2688 == USB_SPEED_FULL))) {
2689 out_flush(ep);
2690 ep->out_overflow = 0;
2691 }
2692
2693
2694 ep->stopped = stopped;
2695 if (!list_empty(&ep->queue))
2696 restart_dma(ep);
2697 } else
2698 ep_dbg(ep->dev, "%s dma ep_stat %08x ??\n",
2699 ep->ep.name, t);
2700 return;
2701
2702
2703 } else if (t & BIT(DATA_PACKET_RECEIVED_INTERRUPT)) {
2704 if (read_fifo(ep, req) && ep->num != 0)
2705 mode = 2;
2706
2707
2708 } else if (t & BIT(DATA_PACKET_TRANSMITTED_INTERRUPT)) {
2709 unsigned len;
2710
2711 len = req->req.length - req->req.actual;
2712 if (len > ep->ep.maxpacket)
2713 len = ep->ep.maxpacket;
2714 req->req.actual += len;
2715
2716
2717
2718 if ((req->req.actual == req->req.length) &&
2719 (!req->req.zero || len != ep->ep.maxpacket) && ep->num)
2720 mode = 2;
2721
2722
2723 } else if (mode == 1)
2724 return;
2725
2726
2727 if (mode == 2) {
2728
2729 done(ep, req, 0);
2730
2731
2732 if (ep->num == 0) {
2733
2734
2735
2736
2737 if (!ep->stopped)
2738 allow_status(ep);
2739 req = NULL;
2740 } else {
2741 if (!list_empty(&ep->queue) && !ep->stopped)
2742 req = list_entry(ep->queue.next,
2743 struct net2280_request, queue);
2744 else
2745 req = NULL;
2746 if (req && !ep->is_in)
2747 stop_out_naking(ep);
2748 }
2749 }
2750
2751
2752
2753
2754 if (req && !ep->stopped) {
2755
2756
2757 if (t & BIT(DATA_PACKET_TRANSMITTED_INTERRUPT))
2758 write_fifo(ep, &req->req);
2759 }
2760}
2761
2762static struct net2280_ep *get_ep_by_addr(struct net2280 *dev, u16 wIndex)
2763{
2764 struct net2280_ep *ep;
2765
2766 if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0)
2767 return &dev->ep[0];
2768 list_for_each_entry(ep, &dev->gadget.ep_list, ep.ep_list) {
2769 u8 bEndpointAddress;
2770
2771 if (!ep->desc)
2772 continue;
2773 bEndpointAddress = ep->desc->bEndpointAddress;
2774 if ((wIndex ^ bEndpointAddress) & USB_DIR_IN)
2775 continue;
2776 if ((wIndex & 0x0f) == (bEndpointAddress & 0x0f))
2777 return ep;
2778 }
2779 return NULL;
2780}
2781
2782static void defect7374_workaround(struct net2280 *dev, struct usb_ctrlrequest r)
2783{
2784 u32 scratch, fsmvalue;
2785 u32 ack_wait_timeout, state;
2786
2787
2788 scratch = get_idx_reg(dev->regs, SCRATCH);
2789 fsmvalue = scratch & (0xf << DEFECT7374_FSM_FIELD);
2790 scratch &= ~(0xf << DEFECT7374_FSM_FIELD);
2791
2792 if (!((fsmvalue == DEFECT7374_FSM_WAITING_FOR_CONTROL_READ) &&
2793 (r.bRequestType & USB_DIR_IN)))
2794 return;
2795
2796
2797 if (!(readl(&dev->usb->usbstat) & BIT(SUPER_SPEED_MODE))) {
2798
2799
2800
2801
2802
2803
2804 scratch |= DEFECT7374_FSM_NON_SS_CONTROL_READ;
2805 dev->bug7734_patched = 1;
2806 goto restore_data_eps;
2807 }
2808
2809
2810 for (ack_wait_timeout = 0;
2811 ack_wait_timeout < DEFECT_7374_NUMBEROF_MAX_WAIT_LOOPS;
2812 ack_wait_timeout++) {
2813
2814 state = readl(&dev->plregs->pl_ep_status_1)
2815 & (0xff << STATE);
2816 if ((state >= (ACK_GOOD_NORMAL << STATE)) &&
2817 (state <= (ACK_GOOD_MORE_ACKS_TO_COME << STATE))) {
2818 scratch |= DEFECT7374_FSM_SS_CONTROL_READ;
2819 dev->bug7734_patched = 1;
2820 break;
2821 }
2822
2823
2824
2825
2826
2827 udelay(DEFECT_7374_PROCESSOR_WAIT_TIME);
2828 }
2829
2830
2831 if (ack_wait_timeout >= DEFECT_7374_NUMBEROF_MAX_WAIT_LOOPS) {
2832 ep_err(dev, "FAIL: Defect 7374 workaround waited but failed "
2833 "to detect SS host's data phase ACK.");
2834 ep_err(dev, "PL_EP_STATUS_1(23:16):.Expected from 0x11 to 0x16"
2835 "got 0x%2.2x.\n", state >> STATE);
2836 } else {
2837 ep_warn(dev, "INFO: Defect 7374 workaround waited about\n"
2838 "%duSec for Control Read Data Phase ACK\n",
2839 DEFECT_7374_PROCESSOR_WAIT_TIME * ack_wait_timeout);
2840 }
2841
2842restore_data_eps:
2843
2844
2845
2846
2847 defect7374_disable_data_eps(dev);
2848
2849 set_idx_reg(dev->regs, SCRATCH, scratch);
2850
2851 return;
2852}
2853
2854static void ep_clear_seqnum(struct net2280_ep *ep)
2855{
2856 struct net2280 *dev = ep->dev;
2857 u32 val;
2858 static const u32 ep_pl[9] = { 0, 3, 4, 7, 8, 2, 5, 6, 9 };
2859
2860 val = readl(&dev->plregs->pl_ep_ctrl) & ~0x1f;
2861 val |= ep_pl[ep->num];
2862 writel(val, &dev->plregs->pl_ep_ctrl);
2863 val |= BIT(SEQUENCE_NUMBER_RESET);
2864 writel(val, &dev->plregs->pl_ep_ctrl);
2865
2866 return;
2867}
2868
2869static void handle_stat0_irqs_superspeed(struct net2280 *dev,
2870 struct net2280_ep *ep, struct usb_ctrlrequest r)
2871{
2872 struct net2280_ep *e;
2873 u16 status;
2874 int tmp = 0;
2875
2876#define w_value le16_to_cpu(r.wValue)
2877#define w_index le16_to_cpu(r.wIndex)
2878#define w_length le16_to_cpu(r.wLength)
2879
2880 switch (r.bRequest) {
2881 case USB_REQ_SET_CONFIGURATION:
2882 dev->addressed_state = !w_value;
2883 goto usb3_delegate;
2884
2885 case USB_REQ_GET_STATUS:
2886 switch (r.bRequestType) {
2887 case (USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_DEVICE):
2888 status = dev->wakeup_enable ? 0x02 : 0x00;
2889 if (dev->gadget.is_selfpowered)
2890 status |= BIT(0);
2891 status |= (dev->u1_enable << 2 | dev->u2_enable << 3 |
2892 dev->ltm_enable << 4);
2893 writel(0, &dev->epregs[0].ep_irqenb);
2894 set_fifo_bytecount(ep, sizeof(status));
2895 writel((__force u32) status, &dev->epregs[0].ep_data);
2896 allow_status_338x(ep);
2897 break;
2898
2899 case (USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_ENDPOINT):
2900 e = get_ep_by_addr(dev, w_index);
2901 if (!e)
2902 goto do_stall3;
2903 status = readl(&e->regs->ep_rsp) &
2904 BIT(CLEAR_ENDPOINT_HALT);
2905 writel(0, &dev->epregs[0].ep_irqenb);
2906 set_fifo_bytecount(ep, sizeof(status));
2907 writel((__force u32) status, &dev->epregs[0].ep_data);
2908 allow_status_338x(ep);
2909 break;
2910
2911 default:
2912 goto usb3_delegate;
2913 }
2914 break;
2915
2916 case USB_REQ_CLEAR_FEATURE:
2917 switch (r.bRequestType) {
2918 case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE):
2919 if (!dev->addressed_state) {
2920 switch (w_value) {
2921 case USB_DEVICE_U1_ENABLE:
2922 dev->u1_enable = 0;
2923 writel(readl(&dev->usb_ext->usbctl2) &
2924 ~BIT(U1_ENABLE),
2925 &dev->usb_ext->usbctl2);
2926 allow_status_338x(ep);
2927 goto next_endpoints3;
2928
2929 case USB_DEVICE_U2_ENABLE:
2930 dev->u2_enable = 0;
2931 writel(readl(&dev->usb_ext->usbctl2) &
2932 ~BIT(U2_ENABLE),
2933 &dev->usb_ext->usbctl2);
2934 allow_status_338x(ep);
2935 goto next_endpoints3;
2936
2937 case USB_DEVICE_LTM_ENABLE:
2938 dev->ltm_enable = 0;
2939 writel(readl(&dev->usb_ext->usbctl2) &
2940 ~BIT(LTM_ENABLE),
2941 &dev->usb_ext->usbctl2);
2942 allow_status_338x(ep);
2943 goto next_endpoints3;
2944
2945 default:
2946 break;
2947 }
2948 }
2949 if (w_value == USB_DEVICE_REMOTE_WAKEUP) {
2950 dev->wakeup_enable = 0;
2951 writel(readl(&dev->usb->usbctl) &
2952 ~BIT(DEVICE_REMOTE_WAKEUP_ENABLE),
2953 &dev->usb->usbctl);
2954 allow_status_338x(ep);
2955 break;
2956 }
2957 goto usb3_delegate;
2958
2959 case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_ENDPOINT):
2960 e = get_ep_by_addr(dev, w_index);
2961 if (!e)
2962 goto do_stall3;
2963 if (w_value != USB_ENDPOINT_HALT)
2964 goto do_stall3;
2965 ep_vdbg(dev, "%s clear halt\n", e->ep.name);
2966
2967
2968
2969
2970 ep_clear_seqnum(e);
2971 clear_halt(e);
2972 if (!list_empty(&e->queue) && e->td_dma)
2973 restart_dma(e);
2974 allow_status(ep);
2975 ep->stopped = 1;
2976 break;
2977
2978 default:
2979 goto usb3_delegate;
2980 }
2981 break;
2982 case USB_REQ_SET_FEATURE:
2983 switch (r.bRequestType) {
2984 case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE):
2985 if (!dev->addressed_state) {
2986 switch (w_value) {
2987 case USB_DEVICE_U1_ENABLE:
2988 dev->u1_enable = 1;
2989 writel(readl(&dev->usb_ext->usbctl2) |
2990 BIT(U1_ENABLE),
2991 &dev->usb_ext->usbctl2);
2992 allow_status_338x(ep);
2993 goto next_endpoints3;
2994
2995 case USB_DEVICE_U2_ENABLE:
2996 dev->u2_enable = 1;
2997 writel(readl(&dev->usb_ext->usbctl2) |
2998 BIT(U2_ENABLE),
2999 &dev->usb_ext->usbctl2);
3000 allow_status_338x(ep);
3001 goto next_endpoints3;
3002
3003 case USB_DEVICE_LTM_ENABLE:
3004 dev->ltm_enable = 1;
3005 writel(readl(&dev->usb_ext->usbctl2) |
3006 BIT(LTM_ENABLE),
3007 &dev->usb_ext->usbctl2);
3008 allow_status_338x(ep);
3009 goto next_endpoints3;
3010 default:
3011 break;
3012 }
3013 }
3014
3015 if (w_value == USB_DEVICE_REMOTE_WAKEUP) {
3016 dev->wakeup_enable = 1;
3017 writel(readl(&dev->usb->usbctl) |
3018 BIT(DEVICE_REMOTE_WAKEUP_ENABLE),
3019 &dev->usb->usbctl);
3020 allow_status_338x(ep);
3021 break;
3022 }
3023 goto usb3_delegate;
3024
3025 case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_ENDPOINT):
3026 e = get_ep_by_addr(dev, w_index);
3027 if (!e || (w_value != USB_ENDPOINT_HALT))
3028 goto do_stall3;
3029 ep->stopped = 1;
3030 if (ep->num == 0)
3031 ep->dev->protocol_stall = 1;
3032 else {
3033 if (ep->dma)
3034 abort_dma(ep);
3035 set_halt(ep);
3036 }
3037 allow_status_338x(ep);
3038 break;
3039
3040 default:
3041 goto usb3_delegate;
3042 }
3043
3044 break;
3045 default:
3046
3047usb3_delegate:
3048 ep_vdbg(dev, "setup %02x.%02x v%04x i%04x l%04x ep_cfg %08x\n",
3049 r.bRequestType, r.bRequest,
3050 w_value, w_index, w_length,
3051 readl(&ep->cfg->ep_cfg));
3052
3053 ep->responded = 0;
3054 if (dev->async_callbacks) {
3055 spin_unlock(&dev->lock);
3056 tmp = dev->driver->setup(&dev->gadget, &r);
3057 spin_lock(&dev->lock);
3058 }
3059 }
3060do_stall3:
3061 if (tmp < 0) {
3062 ep_vdbg(dev, "req %02x.%02x protocol STALL; stat %d\n",
3063 r.bRequestType, r.bRequest, tmp);
3064 dev->protocol_stall = 1;
3065
3066 set_halt(ep);
3067 }
3068
3069next_endpoints3:
3070
3071#undef w_value
3072#undef w_index
3073#undef w_length
3074
3075 return;
3076}
3077
3078static void usb338x_handle_ep_intr(struct net2280 *dev, u32 stat0)
3079{
3080 u32 index;
3081 u32 bit;
3082
3083 for (index = 0; index < ARRAY_SIZE(ep_bit); index++) {
3084 bit = BIT(ep_bit[index]);
3085
3086 if (!stat0)
3087 break;
3088
3089 if (!(stat0 & bit))
3090 continue;
3091
3092 stat0 &= ~bit;
3093
3094 handle_ep_small(&dev->ep[index]);
3095 }
3096}
3097
3098static void handle_stat0_irqs(struct net2280 *dev, u32 stat)
3099{
3100 struct net2280_ep *ep;
3101 u32 num, scratch;
3102
3103
3104 stat &= ~BIT(INTA_ASSERTED);
3105 if (!stat)
3106 return;
3107
3108
3109
3110 if (unlikely(stat & BIT(SETUP_PACKET_INTERRUPT))) {
3111 union {
3112 u32 raw[2];
3113 struct usb_ctrlrequest r;
3114 } u;
3115 int tmp;
3116 struct net2280_request *req;
3117
3118 if (dev->gadget.speed == USB_SPEED_UNKNOWN) {
3119 u32 val = readl(&dev->usb->usbstat);
3120 if (val & BIT(SUPER_SPEED)) {
3121 dev->gadget.speed = USB_SPEED_SUPER;
3122 usb_ep_set_maxpacket_limit(&dev->ep[0].ep,
3123 EP0_SS_MAX_PACKET_SIZE);
3124 } else if (val & BIT(HIGH_SPEED)) {
3125 dev->gadget.speed = USB_SPEED_HIGH;
3126 usb_ep_set_maxpacket_limit(&dev->ep[0].ep,
3127 EP0_HS_MAX_PACKET_SIZE);
3128 } else {
3129 dev->gadget.speed = USB_SPEED_FULL;
3130 usb_ep_set_maxpacket_limit(&dev->ep[0].ep,
3131 EP0_HS_MAX_PACKET_SIZE);
3132 }
3133 net2280_led_speed(dev, dev->gadget.speed);
3134 ep_dbg(dev, "%s\n",
3135 usb_speed_string(dev->gadget.speed));
3136 }
3137
3138 ep = &dev->ep[0];
3139 ep->irqs++;
3140
3141
3142 stat &= ~BIT(ENDPOINT_0_INTERRUPT);
3143 while (!list_empty(&ep->queue)) {
3144 req = list_entry(ep->queue.next,
3145 struct net2280_request, queue);
3146 done(ep, req, (req->req.actual == req->req.length)
3147 ? 0 : -EPROTO);
3148 }
3149 ep->stopped = 0;
3150 dev->protocol_stall = 0;
3151 if (!(dev->quirks & PLX_PCIE)) {
3152 if (ep->dev->quirks & PLX_2280)
3153 tmp = BIT(FIFO_OVERFLOW) |
3154 BIT(FIFO_UNDERFLOW);
3155 else
3156 tmp = 0;
3157
3158 writel(tmp | BIT(TIMEOUT) |
3159 BIT(USB_STALL_SENT) |
3160 BIT(USB_IN_NAK_SENT) |
3161 BIT(USB_IN_ACK_RCVD) |
3162 BIT(USB_OUT_PING_NAK_SENT) |
3163 BIT(USB_OUT_ACK_SENT) |
3164 BIT(SHORT_PACKET_OUT_DONE_INTERRUPT) |
3165 BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT) |
3166 BIT(DATA_PACKET_RECEIVED_INTERRUPT) |
3167 BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) |
3168 BIT(DATA_OUT_PING_TOKEN_INTERRUPT) |
3169 BIT(DATA_IN_TOKEN_INTERRUPT),
3170 &ep->regs->ep_stat);
3171 }
3172 u.raw[0] = readl(&dev->usb->setup0123);
3173 u.raw[1] = readl(&dev->usb->setup4567);
3174
3175 cpu_to_le32s(&u.raw[0]);
3176 cpu_to_le32s(&u.raw[1]);
3177
3178 if ((dev->quirks & PLX_PCIE) && !dev->bug7734_patched)
3179 defect7374_workaround(dev, u.r);
3180
3181 tmp = 0;
3182
3183#define w_value le16_to_cpu(u.r.wValue)
3184#define w_index le16_to_cpu(u.r.wIndex)
3185#define w_length le16_to_cpu(u.r.wLength)
3186
3187
3188 writel(BIT(SETUP_PACKET_INTERRUPT), &dev->regs->irqstat0);
3189 stat ^= BIT(SETUP_PACKET_INTERRUPT);
3190
3191
3192
3193
3194
3195
3196 ep->is_in = (u.r.bRequestType & USB_DIR_IN) != 0;
3197 if (ep->is_in) {
3198 scratch = BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) |
3199 BIT(DATA_OUT_PING_TOKEN_INTERRUPT) |
3200 BIT(DATA_IN_TOKEN_INTERRUPT);
3201 stop_out_naking(ep);
3202 } else
3203 scratch = BIT(DATA_PACKET_RECEIVED_INTERRUPT) |
3204 BIT(DATA_OUT_PING_TOKEN_INTERRUPT) |
3205 BIT(DATA_IN_TOKEN_INTERRUPT);
3206 writel(scratch, &dev->epregs[0].ep_irqenb);
3207
3208
3209
3210
3211 ep->responded = 1;
3212
3213 if (dev->gadget.speed == USB_SPEED_SUPER) {
3214 handle_stat0_irqs_superspeed(dev, ep, u.r);
3215 goto next_endpoints;
3216 }
3217
3218 switch (u.r.bRequest) {
3219 case USB_REQ_GET_STATUS: {
3220 struct net2280_ep *e;
3221 __le32 status;
3222
3223
3224 if (u.r.bRequestType != (USB_DIR_IN|USB_RECIP_ENDPOINT))
3225 goto delegate;
3226 e = get_ep_by_addr(dev, w_index);
3227 if (!e || w_length > 2)
3228 goto do_stall;
3229
3230 if (readl(&e->regs->ep_rsp) & BIT(SET_ENDPOINT_HALT))
3231 status = cpu_to_le32(1);
3232 else
3233 status = cpu_to_le32(0);
3234
3235
3236 writel(0, &dev->epregs[0].ep_irqenb);
3237 set_fifo_bytecount(ep, w_length);
3238 writel((__force u32)status, &dev->epregs[0].ep_data);
3239 allow_status(ep);
3240 ep_vdbg(dev, "%s stat %02x\n", ep->ep.name, status);
3241 goto next_endpoints;
3242 }
3243 break;
3244 case USB_REQ_CLEAR_FEATURE: {
3245 struct net2280_ep *e;
3246
3247
3248 if (u.r.bRequestType != USB_RECIP_ENDPOINT)
3249 goto delegate;
3250 if (w_value != USB_ENDPOINT_HALT || w_length != 0)
3251 goto do_stall;
3252 e = get_ep_by_addr(dev, w_index);
3253 if (!e)
3254 goto do_stall;
3255 if (e->wedged) {
3256 ep_vdbg(dev, "%s wedged, halt not cleared\n",
3257 ep->ep.name);
3258 } else {
3259 ep_vdbg(dev, "%s clear halt\n", e->ep.name);
3260 clear_halt(e);
3261 if ((ep->dev->quirks & PLX_PCIE) &&
3262 !list_empty(&e->queue) && e->td_dma)
3263 restart_dma(e);
3264 }
3265 allow_status(ep);
3266 goto next_endpoints;
3267 }
3268 break;
3269 case USB_REQ_SET_FEATURE: {
3270 struct net2280_ep *e;
3271
3272
3273 if (u.r.bRequestType != USB_RECIP_ENDPOINT)
3274 goto delegate;
3275 if (w_value != USB_ENDPOINT_HALT || w_length != 0)
3276 goto do_stall;
3277 e = get_ep_by_addr(dev, w_index);
3278 if (!e)
3279 goto do_stall;
3280 if (e->ep.name == ep0name)
3281 goto do_stall;
3282 set_halt(e);
3283 if ((dev->quirks & PLX_PCIE) && e->dma)
3284 abort_dma(e);
3285 allow_status(ep);
3286 ep_vdbg(dev, "%s set halt\n", ep->ep.name);
3287 goto next_endpoints;
3288 }
3289 break;
3290 default:
3291delegate:
3292 ep_vdbg(dev, "setup %02x.%02x v%04x i%04x l%04x "
3293 "ep_cfg %08x\n",
3294 u.r.bRequestType, u.r.bRequest,
3295 w_value, w_index, w_length,
3296 readl(&ep->cfg->ep_cfg));
3297 ep->responded = 0;
3298 if (dev->async_callbacks) {
3299 spin_unlock(&dev->lock);
3300 tmp = dev->driver->setup(&dev->gadget, &u.r);
3301 spin_lock(&dev->lock);
3302 }
3303 }
3304
3305
3306 if (tmp < 0) {
3307do_stall:
3308 ep_vdbg(dev, "req %02x.%02x protocol STALL; stat %d\n",
3309 u.r.bRequestType, u.r.bRequest, tmp);
3310 dev->protocol_stall = 1;
3311 }
3312
3313
3314
3315
3316
3317 }
3318
3319#undef w_value
3320#undef w_index
3321#undef w_length
3322
3323next_endpoints:
3324 if ((dev->quirks & PLX_PCIE) && dev->enhanced_mode) {
3325 u32 mask = (BIT(ENDPOINT_0_INTERRUPT) |
3326 USB3380_IRQSTAT0_EP_INTR_MASK_IN |
3327 USB3380_IRQSTAT0_EP_INTR_MASK_OUT);
3328
3329 if (stat & mask) {
3330 usb338x_handle_ep_intr(dev, stat & mask);
3331 stat &= ~mask;
3332 }
3333 } else {
3334
3335 scratch = stat & 0x7f;
3336 stat &= ~0x7f;
3337 for (num = 0; scratch; num++) {
3338 u32 t;
3339
3340
3341 t = BIT(num);
3342 if ((scratch & t) == 0)
3343 continue;
3344 scratch ^= t;
3345
3346 ep = &dev->ep[num];
3347 handle_ep_small(ep);
3348 }
3349 }
3350
3351 if (stat)
3352 ep_dbg(dev, "unhandled irqstat0 %08x\n", stat);
3353}
3354
3355#define DMA_INTERRUPTS (BIT(DMA_D_INTERRUPT) | \
3356 BIT(DMA_C_INTERRUPT) | \
3357 BIT(DMA_B_INTERRUPT) | \
3358 BIT(DMA_A_INTERRUPT))
3359#define PCI_ERROR_INTERRUPTS ( \
3360 BIT(PCI_MASTER_ABORT_RECEIVED_INTERRUPT) | \
3361 BIT(PCI_TARGET_ABORT_RECEIVED_INTERRUPT) | \
3362 BIT(PCI_RETRY_ABORT_INTERRUPT))
3363
3364static void handle_stat1_irqs(struct net2280 *dev, u32 stat)
3365__releases(dev->lock)
3366__acquires(dev->lock)
3367{
3368 struct net2280_ep *ep;
3369 u32 tmp, num, mask, scratch;
3370
3371
3372 tmp = BIT(VBUS_INTERRUPT) | BIT(ROOT_PORT_RESET_INTERRUPT);
3373 mask = BIT(SUPER_SPEED) | BIT(HIGH_SPEED) | BIT(FULL_SPEED);
3374
3375
3376
3377
3378
3379
3380 if (stat & tmp) {
3381 bool reset = false;
3382 bool disconnect = false;
3383
3384
3385
3386
3387
3388 writel(tmp, &dev->regs->irqstat1);
3389 if (dev->gadget.speed != USB_SPEED_UNKNOWN) {
3390 if ((stat & BIT(VBUS_INTERRUPT)) &&
3391 (readl(&dev->usb->usbctl) &
3392 BIT(VBUS_PIN)) == 0) {
3393 disconnect = true;
3394 ep_dbg(dev, "disconnect %s\n",
3395 dev->driver->driver.name);
3396 } else if ((stat & BIT(ROOT_PORT_RESET_INTERRUPT)) &&
3397 (readl(&dev->usb->usbstat) & mask)
3398 == 0) {
3399 reset = true;
3400 ep_dbg(dev, "reset %s\n",
3401 dev->driver->driver.name);
3402 }
3403
3404 if (disconnect || reset) {
3405 stop_activity(dev, dev->driver);
3406 ep0_start(dev);
3407 if (dev->async_callbacks) {
3408 spin_unlock(&dev->lock);
3409 if (reset)
3410 usb_gadget_udc_reset(&dev->gadget, dev->driver);
3411 else
3412 (dev->driver->disconnect)(&dev->gadget);
3413 spin_lock(&dev->lock);
3414 }
3415 return;
3416 }
3417 }
3418 stat &= ~tmp;
3419
3420
3421
3422
3423 if (!stat)
3424 return;
3425 }
3426
3427
3428
3429
3430 tmp = BIT(SUSPEND_REQUEST_CHANGE_INTERRUPT);
3431 if (stat & tmp) {
3432 writel(tmp, &dev->regs->irqstat1);
3433 spin_unlock(&dev->lock);
3434 if (stat & BIT(SUSPEND_REQUEST_INTERRUPT)) {
3435 if (dev->async_callbacks && dev->driver->suspend)
3436 dev->driver->suspend(&dev->gadget);
3437 if (!enable_suspend)
3438 stat &= ~BIT(SUSPEND_REQUEST_INTERRUPT);
3439 } else {
3440 if (dev->async_callbacks && dev->driver->resume)
3441 dev->driver->resume(&dev->gadget);
3442
3443 }
3444 spin_lock(&dev->lock);
3445 stat &= ~tmp;
3446 }
3447
3448
3449 if (stat)
3450 writel(stat, &dev->regs->irqstat1);
3451
3452
3453 if (dev->quirks & PLX_2280)
3454 stat &= ~(BIT(CONTROL_STATUS_INTERRUPT) |
3455 BIT(SUSPEND_REQUEST_INTERRUPT) |
3456 BIT(RESUME_INTERRUPT) |
3457 BIT(SOF_INTERRUPT));
3458 else
3459 stat &= ~(BIT(CONTROL_STATUS_INTERRUPT) |
3460 BIT(RESUME_INTERRUPT) |
3461 BIT(SOF_DOWN_INTERRUPT) |
3462 BIT(SOF_INTERRUPT));
3463
3464 if (!stat)
3465 return;
3466
3467
3468
3469 scratch = stat & DMA_INTERRUPTS;
3470 stat &= ~DMA_INTERRUPTS;
3471 scratch >>= 9;
3472 for (num = 0; scratch; num++) {
3473 struct net2280_dma_regs __iomem *dma;
3474
3475 tmp = BIT(num);
3476 if ((tmp & scratch) == 0)
3477 continue;
3478 scratch ^= tmp;
3479
3480 ep = &dev->ep[num + 1];
3481 dma = ep->dma;
3482
3483 if (!dma)
3484 continue;
3485
3486
3487 tmp = readl(&dma->dmastat);
3488 writel(tmp, &dma->dmastat);
3489
3490
3491 if (dev->quirks & PLX_PCIE) {
3492 u32 r_dmacount = readl(&dma->dmacount);
3493 if (!ep->is_in && (r_dmacount & 0x00FFFFFF) &&
3494 (tmp & BIT(DMA_TRANSACTION_DONE_INTERRUPT)))
3495 continue;
3496 }
3497
3498 if (!(tmp & BIT(DMA_TRANSACTION_DONE_INTERRUPT))) {
3499 ep_dbg(ep->dev, "%s no xact done? %08x\n",
3500 ep->ep.name, tmp);
3501 continue;
3502 }
3503 stop_dma(ep->dma);
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515 scan_dma_completions(ep);
3516
3517
3518 if (!list_empty(&ep->queue)) {
3519 tmp = readl(&dma->dmactl);
3520 restart_dma(ep);
3521 }
3522 ep->irqs++;
3523 }
3524
3525
3526
3527
3528 if (stat & PCI_ERROR_INTERRUPTS) {
3529 ep_err(dev, "pci dma error; stat %08x\n", stat);
3530 stat &= ~PCI_ERROR_INTERRUPTS;
3531
3532
3533
3534 stop_activity(dev, dev->driver);
3535 ep0_start(dev);
3536 stat = 0;
3537 }
3538
3539 if (stat)
3540 ep_dbg(dev, "unhandled irqstat1 %08x\n", stat);
3541}
3542
3543static irqreturn_t net2280_irq(int irq, void *_dev)
3544{
3545 struct net2280 *dev = _dev;
3546
3547
3548 if ((dev->quirks & PLX_LEGACY) &&
3549 (!(readl(&dev->regs->irqstat0) & BIT(INTA_ASSERTED))))
3550 return IRQ_NONE;
3551
3552 spin_lock(&dev->lock);
3553
3554
3555 handle_stat1_irqs(dev, readl(&dev->regs->irqstat1));
3556
3557
3558 handle_stat0_irqs(dev, readl(&dev->regs->irqstat0));
3559
3560 if (dev->quirks & PLX_PCIE) {
3561
3562 u32 pciirqenb1 = readl(&dev->regs->pciirqenb1);
3563 writel(pciirqenb1 & 0x7FFFFFFF, &dev->regs->pciirqenb1);
3564 writel(pciirqenb1, &dev->regs->pciirqenb1);
3565 }
3566
3567 spin_unlock(&dev->lock);
3568
3569 return IRQ_HANDLED;
3570}
3571
3572
3573
3574static void gadget_release(struct device *_dev)
3575{
3576 struct net2280 *dev = container_of(_dev, struct net2280, gadget.dev);
3577
3578 kfree(dev);
3579}
3580
3581
3582
3583static void net2280_remove(struct pci_dev *pdev)
3584{
3585 struct net2280 *dev = pci_get_drvdata(pdev);
3586
3587 if (dev->added)
3588 usb_del_gadget(&dev->gadget);
3589
3590 BUG_ON(dev->driver);
3591
3592
3593 if (dev->requests) {
3594 int i;
3595 for (i = 1; i < 5; i++) {
3596 if (!dev->ep[i].dummy)
3597 continue;
3598 dma_pool_free(dev->requests, dev->ep[i].dummy,
3599 dev->ep[i].td_dma);
3600 }
3601 dma_pool_destroy(dev->requests);
3602 }
3603 if (dev->got_irq)
3604 free_irq(pdev->irq, dev);
3605 if (dev->quirks & PLX_PCIE)
3606 pci_disable_msi(pdev);
3607 if (dev->regs) {
3608 net2280_led_shutdown(dev);
3609 iounmap(dev->regs);
3610 }
3611 if (dev->region)
3612 release_mem_region(pci_resource_start(pdev, 0),
3613 pci_resource_len(pdev, 0));
3614 if (dev->enabled)
3615 pci_disable_device(pdev);
3616 device_remove_file(&pdev->dev, &dev_attr_registers);
3617
3618 ep_info(dev, "unbind\n");
3619 usb_put_gadget(&dev->gadget);
3620}
3621
3622
3623
3624
3625
3626static int net2280_probe(struct pci_dev *pdev, const struct pci_device_id *id)
3627{
3628 struct net2280 *dev;
3629 unsigned long resource, len;
3630 void __iomem *base = NULL;
3631 int retval, i;
3632
3633
3634 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
3635 if (dev == NULL) {
3636 retval = -ENOMEM;
3637 goto done;
3638 }
3639
3640 pci_set_drvdata(pdev, dev);
3641 usb_initialize_gadget(&pdev->dev, &dev->gadget, gadget_release);
3642 spin_lock_init(&dev->lock);
3643 dev->quirks = id->driver_data;
3644 dev->pdev = pdev;
3645 dev->gadget.ops = &net2280_ops;
3646 dev->gadget.max_speed = (dev->quirks & PLX_SUPERSPEED) ?
3647 USB_SPEED_SUPER : USB_SPEED_HIGH;
3648
3649
3650 dev->gadget.name = driver_name;
3651
3652
3653 if (pci_enable_device(pdev) < 0) {
3654 retval = -ENODEV;
3655 goto done;
3656 }
3657 dev->enabled = 1;
3658
3659
3660
3661
3662
3663 resource = pci_resource_start(pdev, 0);
3664 len = pci_resource_len(pdev, 0);
3665 if (!request_mem_region(resource, len, driver_name)) {
3666 ep_dbg(dev, "controller already in use\n");
3667 retval = -EBUSY;
3668 goto done;
3669 }
3670 dev->region = 1;
3671
3672
3673
3674
3675
3676 base = ioremap(resource, len);
3677 if (base == NULL) {
3678 ep_dbg(dev, "can't map memory\n");
3679 retval = -EFAULT;
3680 goto done;
3681 }
3682 dev->regs = (struct net2280_regs __iomem *) base;
3683 dev->usb = (struct net2280_usb_regs __iomem *) (base + 0x0080);
3684 dev->pci = (struct net2280_pci_regs __iomem *) (base + 0x0100);
3685 dev->dma = (struct net2280_dma_regs __iomem *) (base + 0x0180);
3686 dev->dep = (struct net2280_dep_regs __iomem *) (base + 0x0200);
3687 dev->epregs = (struct net2280_ep_regs __iomem *) (base + 0x0300);
3688
3689 if (dev->quirks & PLX_PCIE) {
3690 u32 fsmvalue;
3691 u32 usbstat;
3692 dev->usb_ext = (struct usb338x_usb_ext_regs __iomem *)
3693 (base + 0x00b4);
3694 dev->llregs = (struct usb338x_ll_regs __iomem *)
3695 (base + 0x0700);
3696 dev->plregs = (struct usb338x_pl_regs __iomem *)
3697 (base + 0x0800);
3698 usbstat = readl(&dev->usb->usbstat);
3699 dev->enhanced_mode = !!(usbstat & BIT(11));
3700 dev->n_ep = (dev->enhanced_mode) ? 9 : 5;
3701
3702 fsmvalue = get_idx_reg(dev->regs, SCRATCH) &
3703 (0xf << DEFECT7374_FSM_FIELD);
3704
3705 if (fsmvalue == DEFECT7374_FSM_SS_CONTROL_READ) {
3706 dev->bug7734_patched = 1;
3707 writel(0, &dev->usb->usbctl);
3708 } else
3709 dev->bug7734_patched = 0;
3710 } else {
3711 dev->enhanced_mode = 0;
3712 dev->n_ep = 7;
3713
3714 writel(0, &dev->usb->usbctl);
3715 }
3716
3717 usb_reset(dev);
3718 usb_reinit(dev);
3719
3720
3721 if (!pdev->irq) {
3722 ep_err(dev, "No IRQ. Check PCI setup!\n");
3723 retval = -ENODEV;
3724 goto done;
3725 }
3726
3727 if (dev->quirks & PLX_PCIE)
3728 if (pci_enable_msi(pdev))
3729 ep_err(dev, "Failed to enable MSI mode\n");
3730
3731 if (request_irq(pdev->irq, net2280_irq, IRQF_SHARED,
3732 driver_name, dev)) {
3733 ep_err(dev, "request interrupt %d failed\n", pdev->irq);
3734 retval = -EBUSY;
3735 goto done;
3736 }
3737 dev->got_irq = 1;
3738
3739
3740
3741 dev->requests = dma_pool_create("requests", &pdev->dev,
3742 sizeof(struct net2280_dma),
3743 0 ,
3744 0 );
3745 if (!dev->requests) {
3746 ep_dbg(dev, "can't get request pool\n");
3747 retval = -ENOMEM;
3748 goto done;
3749 }
3750 for (i = 1; i < 5; i++) {
3751 struct net2280_dma *td;
3752
3753 td = dma_pool_alloc(dev->requests, GFP_KERNEL,
3754 &dev->ep[i].td_dma);
3755 if (!td) {
3756 ep_dbg(dev, "can't get dummy %d\n", i);
3757 retval = -ENOMEM;
3758 goto done;
3759 }
3760 td->dmacount = 0;
3761 td->dmadesc = td->dmaaddr;
3762 dev->ep[i].dummy = td;
3763 }
3764
3765
3766 if (dev->quirks & PLX_LEGACY)
3767 writel(BIT(DMA_MEMORY_WRITE_AND_INVALIDATE_ENABLE) |
3768
3769
3770
3771
3772 BIT(DMA_READ_MULTIPLE_ENABLE) |
3773 BIT(DMA_READ_LINE_ENABLE),
3774 &dev->pci->pcimstctl);
3775
3776 pci_set_master(pdev);
3777 pci_try_set_mwi(pdev);
3778
3779
3780 dev->chiprev = get_idx_reg(dev->regs, REG_CHIPREV) & 0xffff;
3781
3782
3783 ep_info(dev, "%s\n", driver_desc);
3784 ep_info(dev, "irq %d, pci mem %p, chip rev %04x\n",
3785 pdev->irq, base, dev->chiprev);
3786 ep_info(dev, "version: " DRIVER_VERSION "; %s\n",
3787 dev->enhanced_mode ? "enhanced mode" : "legacy mode");
3788 retval = device_create_file(&pdev->dev, &dev_attr_registers);
3789 if (retval)
3790 goto done;
3791
3792 retval = usb_add_gadget(&dev->gadget);
3793 if (retval)
3794 goto done;
3795 dev->added = 1;
3796 return 0;
3797
3798done:
3799 if (dev) {
3800 net2280_remove(pdev);
3801 kfree(dev);
3802 }
3803 return retval;
3804}
3805
3806
3807
3808
3809
3810static void net2280_shutdown(struct pci_dev *pdev)
3811{
3812 struct net2280 *dev = pci_get_drvdata(pdev);
3813
3814
3815 writel(0, &dev->regs->pciirqenb0);
3816 writel(0, &dev->regs->pciirqenb1);
3817
3818
3819 writel(0, &dev->usb->usbctl);
3820
3821}
3822
3823
3824
3825
3826static const struct pci_device_id pci_ids[] = { {
3827 .class = PCI_CLASS_SERIAL_USB_DEVICE,
3828 .class_mask = ~0,
3829 .vendor = PCI_VENDOR_ID_PLX_LEGACY,
3830 .device = 0x2280,
3831 .subvendor = PCI_ANY_ID,
3832 .subdevice = PCI_ANY_ID,
3833 .driver_data = PLX_LEGACY | PLX_2280,
3834 }, {
3835 .class = PCI_CLASS_SERIAL_USB_DEVICE,
3836 .class_mask = ~0,
3837 .vendor = PCI_VENDOR_ID_PLX_LEGACY,
3838 .device = 0x2282,
3839 .subvendor = PCI_ANY_ID,
3840 .subdevice = PCI_ANY_ID,
3841 .driver_data = PLX_LEGACY,
3842 },
3843 {
3844 .class = PCI_CLASS_SERIAL_USB_DEVICE,
3845 .class_mask = ~0,
3846 .vendor = PCI_VENDOR_ID_PLX,
3847 .device = 0x2380,
3848 .subvendor = PCI_ANY_ID,
3849 .subdevice = PCI_ANY_ID,
3850 .driver_data = PLX_PCIE,
3851 },
3852 {
3853 .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe),
3854 .class_mask = ~0,
3855 .vendor = PCI_VENDOR_ID_PLX,
3856 .device = 0x3380,
3857 .subvendor = PCI_ANY_ID,
3858 .subdevice = PCI_ANY_ID,
3859 .driver_data = PLX_PCIE | PLX_SUPERSPEED,
3860 },
3861 {
3862 .class = PCI_CLASS_SERIAL_USB_DEVICE,
3863 .class_mask = ~0,
3864 .vendor = PCI_VENDOR_ID_PLX,
3865 .device = 0x3382,
3866 .subvendor = PCI_ANY_ID,
3867 .subdevice = PCI_ANY_ID,
3868 .driver_data = PLX_PCIE | PLX_SUPERSPEED,
3869 },
3870{ }
3871};
3872MODULE_DEVICE_TABLE(pci, pci_ids);
3873
3874
3875static struct pci_driver net2280_pci_driver = {
3876 .name = driver_name,
3877 .id_table = pci_ids,
3878
3879 .probe = net2280_probe,
3880 .remove = net2280_remove,
3881 .shutdown = net2280_shutdown,
3882
3883
3884};
3885
3886module_pci_driver(net2280_pci_driver);
3887
3888MODULE_DESCRIPTION(DRIVER_DESC);
3889MODULE_AUTHOR("David Brownell");
3890MODULE_LICENSE("GPL");
3891