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Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[deliverable/linux.git] / drivers / usb / gadget / udc / net2280.c
1 /*
2 * Driver for the PLX NET2280 USB device controller.
3 * Specs and errata are available from <http://www.plxtech.com>.
4 *
5 * PLX Technology Inc. (formerly NetChip Technology) supported the
6 * development of this driver.
7 *
8 *
9 * CODE STATUS HIGHLIGHTS
10 *
11 * This driver should work well with most "gadget" drivers, including
12 * the Mass Storage, Serial, and Ethernet/RNDIS gadget drivers
13 * as well as Gadget Zero and Gadgetfs.
14 *
15 * DMA is enabled by default.
16 *
17 * MSI is enabled by default. The legacy IRQ is used if MSI couldn't
18 * be enabled.
19 *
20 * Note that almost all the errata workarounds here are only needed for
21 * rev1 chips. Rev1a silicon (0110) fixes almost all of them.
22 */
23
24 /*
25 * Copyright (C) 2003 David Brownell
26 * Copyright (C) 2003-2005 PLX Technology, Inc.
27 * Copyright (C) 2014 Ricardo Ribalda - Qtechnology/AS
28 *
29 * Modified Seth Levy 2005 PLX Technology, Inc. to provide compatibility
30 * with 2282 chip
31 *
32 * Modified Ricardo Ribalda Qtechnology AS to provide compatibility
33 * with usb 338x chip. Based on PLX driver
34 *
35 * This program is free software; you can redistribute it and/or modify
36 * it under the terms of the GNU General Public License as published by
37 * the Free Software Foundation; either version 2 of the License, or
38 * (at your option) any later version.
39 */
40
41 #include <linux/module.h>
42 #include <linux/pci.h>
43 #include <linux/dma-mapping.h>
44 #include <linux/kernel.h>
45 #include <linux/delay.h>
46 #include <linux/ioport.h>
47 #include <linux/slab.h>
48 #include <linux/errno.h>
49 #include <linux/init.h>
50 #include <linux/timer.h>
51 #include <linux/list.h>
52 #include <linux/interrupt.h>
53 #include <linux/moduleparam.h>
54 #include <linux/device.h>
55 #include <linux/usb/ch9.h>
56 #include <linux/usb/gadget.h>
57 #include <linux/prefetch.h>
58 #include <linux/io.h>
59
60 #include <asm/byteorder.h>
61 #include <asm/irq.h>
62 #include <asm/unaligned.h>
63
64 #define DRIVER_DESC "PLX NET228x/USB338x USB Peripheral Controller"
65 #define DRIVER_VERSION "2005 Sept 27/v3.0"
66
67 #define EP_DONTUSE 13 /* nonzero */
68
69 #define USE_RDK_LEDS /* GPIO pins control three LEDs */
70
71
72 static const char driver_name[] = "net2280";
73 static const char driver_desc[] = DRIVER_DESC;
74
75 static const u32 ep_bit[9] = { 0, 17, 2, 19, 4, 1, 18, 3, 20 };
76 static const char ep0name[] = "ep0";
77
78 #define EP_INFO(_name, _caps) \
79 { \
80 .name = _name, \
81 .caps = _caps, \
82 }
83
84 static const struct {
85 const char *name;
86 const struct usb_ep_caps caps;
87 } ep_info_dft[] = { /* Default endpoint configuration */
88 EP_INFO(ep0name,
89 USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL, USB_EP_CAPS_DIR_ALL)),
90 EP_INFO("ep-a",
91 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)),
92 EP_INFO("ep-b",
93 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)),
94 EP_INFO("ep-c",
95 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)),
96 EP_INFO("ep-d",
97 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)),
98 EP_INFO("ep-e",
99 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)),
100 EP_INFO("ep-f",
101 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)),
102 EP_INFO("ep-g",
103 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)),
104 EP_INFO("ep-h",
105 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)),
106 }, ep_info_adv[] = { /* Endpoints for usb3380 advance mode */
107 EP_INFO(ep0name,
108 USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL, USB_EP_CAPS_DIR_ALL)),
109 EP_INFO("ep1in",
110 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)),
111 EP_INFO("ep2out",
112 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
113 EP_INFO("ep3in",
114 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)),
115 EP_INFO("ep4out",
116 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
117 EP_INFO("ep1out",
118 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
119 EP_INFO("ep2in",
120 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)),
121 EP_INFO("ep3out",
122 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
123 EP_INFO("ep4in",
124 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)),
125 };
126
127 #undef EP_INFO
128
129 /* mode 0 == ep-{a,b,c,d} 1K fifo each
130 * mode 1 == ep-{a,b} 2K fifo each, ep-{c,d} unavailable
131 * mode 2 == ep-a 2K fifo, ep-{b,c} 1K each, ep-d unavailable
132 */
133 static ushort fifo_mode;
134
135 /* "modprobe net2280 fifo_mode=1" etc */
136 module_param(fifo_mode, ushort, 0644);
137
138 /* enable_suspend -- When enabled, the driver will respond to
139 * USB suspend requests by powering down the NET2280. Otherwise,
140 * USB suspend requests will be ignored. This is acceptable for
141 * self-powered devices
142 */
143 static bool enable_suspend;
144
145 /* "modprobe net2280 enable_suspend=1" etc */
146 module_param(enable_suspend, bool, 0444);
147
148 #define DIR_STRING(bAddress) (((bAddress) & USB_DIR_IN) ? "in" : "out")
149
150 static char *type_string(u8 bmAttributes)
151 {
152 switch ((bmAttributes) & USB_ENDPOINT_XFERTYPE_MASK) {
153 case USB_ENDPOINT_XFER_BULK: return "bulk";
154 case USB_ENDPOINT_XFER_ISOC: return "iso";
155 case USB_ENDPOINT_XFER_INT: return "intr";
156 }
157 return "control";
158 }
159
160 #include "net2280.h"
161
162 #define valid_bit cpu_to_le32(BIT(VALID_BIT))
163 #define dma_done_ie cpu_to_le32(BIT(DMA_DONE_INTERRUPT_ENABLE))
164
165 static void ep_clear_seqnum(struct net2280_ep *ep);
166 static void stop_activity(struct net2280 *dev,
167 struct usb_gadget_driver *driver);
168 static void ep0_start(struct net2280 *dev);
169
170 /*-------------------------------------------------------------------------*/
171 static inline void enable_pciirqenb(struct net2280_ep *ep)
172 {
173 u32 tmp = readl(&ep->dev->regs->pciirqenb0);
174
175 if (ep->dev->quirks & PLX_LEGACY)
176 tmp |= BIT(ep->num);
177 else
178 tmp |= BIT(ep_bit[ep->num]);
179 writel(tmp, &ep->dev->regs->pciirqenb0);
180
181 return;
182 }
183
184 static int
185 net2280_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
186 {
187 struct net2280 *dev;
188 struct net2280_ep *ep;
189 u32 max;
190 u32 tmp = 0;
191 u32 type;
192 unsigned long flags;
193 static const u32 ep_key[9] = { 1, 0, 1, 0, 1, 1, 0, 1, 0 };
194 int ret = 0;
195
196 ep = container_of(_ep, struct net2280_ep, ep);
197 if (!_ep || !desc || ep->desc || _ep->name == ep0name ||
198 desc->bDescriptorType != USB_DT_ENDPOINT) {
199 pr_err("%s: failed at line=%d\n", __func__, __LINE__);
200 return -EINVAL;
201 }
202 dev = ep->dev;
203 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
204 ret = -ESHUTDOWN;
205 goto print_err;
206 }
207
208 /* erratum 0119 workaround ties up an endpoint number */
209 if ((desc->bEndpointAddress & 0x0f) == EP_DONTUSE) {
210 ret = -EDOM;
211 goto print_err;
212 }
213
214 if (dev->quirks & PLX_PCIE) {
215 if ((desc->bEndpointAddress & 0x0f) >= 0x0c) {
216 ret = -EDOM;
217 goto print_err;
218 }
219 ep->is_in = !!usb_endpoint_dir_in(desc);
220 if (dev->enhanced_mode && ep->is_in && ep_key[ep->num]) {
221 ret = -EINVAL;
222 goto print_err;
223 }
224 }
225
226 /* sanity check ep-e/ep-f since their fifos are small */
227 max = usb_endpoint_maxp(desc) & 0x1fff;
228 if (ep->num > 4 && max > 64 && (dev->quirks & PLX_LEGACY)) {
229 ret = -ERANGE;
230 goto print_err;
231 }
232
233 spin_lock_irqsave(&dev->lock, flags);
234 _ep->maxpacket = max & 0x7ff;
235 ep->desc = desc;
236
237 /* ep_reset() has already been called */
238 ep->stopped = 0;
239 ep->wedged = 0;
240 ep->out_overflow = 0;
241
242 /* set speed-dependent max packet; may kick in high bandwidth */
243 set_max_speed(ep, max);
244
245 /* set type, direction, address; reset fifo counters */
246 writel(BIT(FIFO_FLUSH), &ep->regs->ep_stat);
247
248 if ((dev->quirks & PLX_PCIE) && dev->enhanced_mode) {
249 tmp = readl(&ep->cfg->ep_cfg);
250 /* If USB ep number doesn't match hardware ep number */
251 if ((tmp & 0xf) != usb_endpoint_num(desc)) {
252 ret = -EINVAL;
253 spin_unlock_irqrestore(&dev->lock, flags);
254 goto print_err;
255 }
256 if (ep->is_in)
257 tmp &= ~USB3380_EP_CFG_MASK_IN;
258 else
259 tmp &= ~USB3380_EP_CFG_MASK_OUT;
260 }
261 type = (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK);
262 if (type == USB_ENDPOINT_XFER_INT) {
263 /* erratum 0105 workaround prevents hs NYET */
264 if (dev->chiprev == 0100 &&
265 dev->gadget.speed == USB_SPEED_HIGH &&
266 !(desc->bEndpointAddress & USB_DIR_IN))
267 writel(BIT(CLEAR_NAK_OUT_PACKETS_MODE),
268 &ep->regs->ep_rsp);
269 } else if (type == USB_ENDPOINT_XFER_BULK) {
270 /* catch some particularly blatant driver bugs */
271 if ((dev->gadget.speed == USB_SPEED_SUPER && max != 1024) ||
272 (dev->gadget.speed == USB_SPEED_HIGH && max != 512) ||
273 (dev->gadget.speed == USB_SPEED_FULL && max > 64)) {
274 spin_unlock_irqrestore(&dev->lock, flags);
275 ret = -ERANGE;
276 goto print_err;
277 }
278 }
279 ep->is_iso = (type == USB_ENDPOINT_XFER_ISOC);
280 /* Enable this endpoint */
281 if (dev->quirks & PLX_LEGACY) {
282 tmp |= type << ENDPOINT_TYPE;
283 tmp |= desc->bEndpointAddress;
284 /* default full fifo lines */
285 tmp |= (4 << ENDPOINT_BYTE_COUNT);
286 tmp |= BIT(ENDPOINT_ENABLE);
287 ep->is_in = (tmp & USB_DIR_IN) != 0;
288 } else {
289 /* In Legacy mode, only OUT endpoints are used */
290 if (dev->enhanced_mode && ep->is_in) {
291 tmp |= type << IN_ENDPOINT_TYPE;
292 tmp |= BIT(IN_ENDPOINT_ENABLE);
293 } else {
294 tmp |= type << OUT_ENDPOINT_TYPE;
295 tmp |= BIT(OUT_ENDPOINT_ENABLE);
296 tmp |= (ep->is_in << ENDPOINT_DIRECTION);
297 }
298
299 tmp |= (4 << ENDPOINT_BYTE_COUNT);
300 if (!dev->enhanced_mode)
301 tmp |= usb_endpoint_num(desc);
302 tmp |= (ep->ep.maxburst << MAX_BURST_SIZE);
303 }
304
305 /* Make sure all the registers are written before ep_rsp*/
306 wmb();
307
308 /* for OUT transfers, block the rx fifo until a read is posted */
309 if (!ep->is_in)
310 writel(BIT(SET_NAK_OUT_PACKETS), &ep->regs->ep_rsp);
311 else if (!(dev->quirks & PLX_2280)) {
312 /* Added for 2282, Don't use nak packets on an in endpoint,
313 * this was ignored on 2280
314 */
315 writel(BIT(CLEAR_NAK_OUT_PACKETS) |
316 BIT(CLEAR_NAK_OUT_PACKETS_MODE), &ep->regs->ep_rsp);
317 }
318
319 if (dev->quirks & PLX_PCIE)
320 ep_clear_seqnum(ep);
321 writel(tmp, &ep->cfg->ep_cfg);
322
323 /* enable irqs */
324 if (!ep->dma) { /* pio, per-packet */
325 enable_pciirqenb(ep);
326
327 tmp = BIT(DATA_PACKET_RECEIVED_INTERRUPT_ENABLE) |
328 BIT(DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE);
329 if (dev->quirks & PLX_2280)
330 tmp |= readl(&ep->regs->ep_irqenb);
331 writel(tmp, &ep->regs->ep_irqenb);
332 } else { /* dma, per-request */
333 tmp = BIT((8 + ep->num)); /* completion */
334 tmp |= readl(&dev->regs->pciirqenb1);
335 writel(tmp, &dev->regs->pciirqenb1);
336
337 /* for short OUT transfers, dma completions can't
338 * advance the queue; do it pio-style, by hand.
339 * NOTE erratum 0112 workaround #2
340 */
341 if ((desc->bEndpointAddress & USB_DIR_IN) == 0) {
342 tmp = BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT_ENABLE);
343 writel(tmp, &ep->regs->ep_irqenb);
344
345 enable_pciirqenb(ep);
346 }
347 }
348
349 tmp = desc->bEndpointAddress;
350 ep_dbg(dev, "enabled %s (ep%d%s-%s) %s max %04x\n",
351 _ep->name, tmp & 0x0f, DIR_STRING(tmp),
352 type_string(desc->bmAttributes),
353 ep->dma ? "dma" : "pio", max);
354
355 /* pci writes may still be posted */
356 spin_unlock_irqrestore(&dev->lock, flags);
357 return ret;
358
359 print_err:
360 dev_err(&ep->dev->pdev->dev, "%s: error=%d\n", __func__, ret);
361 return ret;
362 }
363
364 static int handshake(u32 __iomem *ptr, u32 mask, u32 done, int usec)
365 {
366 u32 result;
367
368 do {
369 result = readl(ptr);
370 if (result == ~(u32)0) /* "device unplugged" */
371 return -ENODEV;
372 result &= mask;
373 if (result == done)
374 return 0;
375 udelay(1);
376 usec--;
377 } while (usec > 0);
378 return -ETIMEDOUT;
379 }
380
381 static const struct usb_ep_ops net2280_ep_ops;
382
383 static void ep_reset_228x(struct net2280_regs __iomem *regs,
384 struct net2280_ep *ep)
385 {
386 u32 tmp;
387
388 ep->desc = NULL;
389 INIT_LIST_HEAD(&ep->queue);
390
391 usb_ep_set_maxpacket_limit(&ep->ep, ~0);
392 ep->ep.ops = &net2280_ep_ops;
393
394 /* disable the dma, irqs, endpoint... */
395 if (ep->dma) {
396 writel(0, &ep->dma->dmactl);
397 writel(BIT(DMA_SCATTER_GATHER_DONE_INTERRUPT) |
398 BIT(DMA_TRANSACTION_DONE_INTERRUPT) |
399 BIT(DMA_ABORT),
400 &ep->dma->dmastat);
401
402 tmp = readl(&regs->pciirqenb0);
403 tmp &= ~BIT(ep->num);
404 writel(tmp, &regs->pciirqenb0);
405 } else {
406 tmp = readl(&regs->pciirqenb1);
407 tmp &= ~BIT((8 + ep->num)); /* completion */
408 writel(tmp, &regs->pciirqenb1);
409 }
410 writel(0, &ep->regs->ep_irqenb);
411
412 /* init to our chosen defaults, notably so that we NAK OUT
413 * packets until the driver queues a read (+note erratum 0112)
414 */
415 if (!ep->is_in || (ep->dev->quirks & PLX_2280)) {
416 tmp = BIT(SET_NAK_OUT_PACKETS_MODE) |
417 BIT(SET_NAK_OUT_PACKETS) |
418 BIT(CLEAR_EP_HIDE_STATUS_PHASE) |
419 BIT(CLEAR_INTERRUPT_MODE);
420 } else {
421 /* added for 2282 */
422 tmp = BIT(CLEAR_NAK_OUT_PACKETS_MODE) |
423 BIT(CLEAR_NAK_OUT_PACKETS) |
424 BIT(CLEAR_EP_HIDE_STATUS_PHASE) |
425 BIT(CLEAR_INTERRUPT_MODE);
426 }
427
428 if (ep->num != 0) {
429 tmp |= BIT(CLEAR_ENDPOINT_TOGGLE) |
430 BIT(CLEAR_ENDPOINT_HALT);
431 }
432 writel(tmp, &ep->regs->ep_rsp);
433
434 /* scrub most status bits, and flush any fifo state */
435 if (ep->dev->quirks & PLX_2280)
436 tmp = BIT(FIFO_OVERFLOW) |
437 BIT(FIFO_UNDERFLOW);
438 else
439 tmp = 0;
440
441 writel(tmp | BIT(TIMEOUT) |
442 BIT(USB_STALL_SENT) |
443 BIT(USB_IN_NAK_SENT) |
444 BIT(USB_IN_ACK_RCVD) |
445 BIT(USB_OUT_PING_NAK_SENT) |
446 BIT(USB_OUT_ACK_SENT) |
447 BIT(FIFO_FLUSH) |
448 BIT(SHORT_PACKET_OUT_DONE_INTERRUPT) |
449 BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT) |
450 BIT(DATA_PACKET_RECEIVED_INTERRUPT) |
451 BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) |
452 BIT(DATA_OUT_PING_TOKEN_INTERRUPT) |
453 BIT(DATA_IN_TOKEN_INTERRUPT),
454 &ep->regs->ep_stat);
455
456 /* fifo size is handled separately */
457 }
458
459 static void ep_reset_338x(struct net2280_regs __iomem *regs,
460 struct net2280_ep *ep)
461 {
462 u32 tmp, dmastat;
463
464 ep->desc = NULL;
465 INIT_LIST_HEAD(&ep->queue);
466
467 usb_ep_set_maxpacket_limit(&ep->ep, ~0);
468 ep->ep.ops = &net2280_ep_ops;
469
470 /* disable the dma, irqs, endpoint... */
471 if (ep->dma) {
472 writel(0, &ep->dma->dmactl);
473 writel(BIT(DMA_ABORT_DONE_INTERRUPT) |
474 BIT(DMA_PAUSE_DONE_INTERRUPT) |
475 BIT(DMA_SCATTER_GATHER_DONE_INTERRUPT) |
476 BIT(DMA_TRANSACTION_DONE_INTERRUPT),
477 /* | BIT(DMA_ABORT), */
478 &ep->dma->dmastat);
479
480 dmastat = readl(&ep->dma->dmastat);
481 if (dmastat == 0x5002) {
482 ep_warn(ep->dev, "The dmastat return = %x!!\n",
483 dmastat);
484 writel(0x5a, &ep->dma->dmastat);
485 }
486
487 tmp = readl(&regs->pciirqenb0);
488 tmp &= ~BIT(ep_bit[ep->num]);
489 writel(tmp, &regs->pciirqenb0);
490 } else {
491 if (ep->num < 5) {
492 tmp = readl(&regs->pciirqenb1);
493 tmp &= ~BIT((8 + ep->num)); /* completion */
494 writel(tmp, &regs->pciirqenb1);
495 }
496 }
497 writel(0, &ep->regs->ep_irqenb);
498
499 writel(BIT(SHORT_PACKET_OUT_DONE_INTERRUPT) |
500 BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT) |
501 BIT(FIFO_OVERFLOW) |
502 BIT(DATA_PACKET_RECEIVED_INTERRUPT) |
503 BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) |
504 BIT(DATA_OUT_PING_TOKEN_INTERRUPT) |
505 BIT(DATA_IN_TOKEN_INTERRUPT), &ep->regs->ep_stat);
506
507 tmp = readl(&ep->cfg->ep_cfg);
508 if (ep->is_in)
509 tmp &= ~USB3380_EP_CFG_MASK_IN;
510 else
511 tmp &= ~USB3380_EP_CFG_MASK_OUT;
512 writel(tmp, &ep->cfg->ep_cfg);
513 }
514
515 static void nuke(struct net2280_ep *);
516
517 static int net2280_disable(struct usb_ep *_ep)
518 {
519 struct net2280_ep *ep;
520 unsigned long flags;
521
522 ep = container_of(_ep, struct net2280_ep, ep);
523 if (!_ep || !ep->desc || _ep->name == ep0name) {
524 pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep);
525 return -EINVAL;
526 }
527 spin_lock_irqsave(&ep->dev->lock, flags);
528 nuke(ep);
529
530 if (ep->dev->quirks & PLX_PCIE)
531 ep_reset_338x(ep->dev->regs, ep);
532 else
533 ep_reset_228x(ep->dev->regs, ep);
534
535 ep_vdbg(ep->dev, "disabled %s %s\n",
536 ep->dma ? "dma" : "pio", _ep->name);
537
538 /* synch memory views with the device */
539 (void)readl(&ep->cfg->ep_cfg);
540
541 if (!ep->dma && ep->num >= 1 && ep->num <= 4)
542 ep->dma = &ep->dev->dma[ep->num - 1];
543
544 spin_unlock_irqrestore(&ep->dev->lock, flags);
545 return 0;
546 }
547
548 /*-------------------------------------------------------------------------*/
549
550 static struct usb_request
551 *net2280_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
552 {
553 struct net2280_ep *ep;
554 struct net2280_request *req;
555
556 if (!_ep) {
557 pr_err("%s: Invalid ep\n", __func__);
558 return NULL;
559 }
560 ep = container_of(_ep, struct net2280_ep, ep);
561
562 req = kzalloc(sizeof(*req), gfp_flags);
563 if (!req)
564 return NULL;
565
566 INIT_LIST_HEAD(&req->queue);
567
568 /* this dma descriptor may be swapped with the previous dummy */
569 if (ep->dma) {
570 struct net2280_dma *td;
571
572 td = pci_pool_alloc(ep->dev->requests, gfp_flags,
573 &req->td_dma);
574 if (!td) {
575 kfree(req);
576 return NULL;
577 }
578 td->dmacount = 0; /* not VALID */
579 td->dmadesc = td->dmaaddr;
580 req->td = td;
581 }
582 return &req->req;
583 }
584
585 static void net2280_free_request(struct usb_ep *_ep, struct usb_request *_req)
586 {
587 struct net2280_ep *ep;
588 struct net2280_request *req;
589
590 ep = container_of(_ep, struct net2280_ep, ep);
591 if (!_ep || !_req) {
592 dev_err(&ep->dev->pdev->dev, "%s: Inavlid ep=%p or req=%p\n",
593 __func__, _ep, _req);
594 return;
595 }
596
597 req = container_of(_req, struct net2280_request, req);
598 WARN_ON(!list_empty(&req->queue));
599 if (req->td)
600 pci_pool_free(ep->dev->requests, req->td, req->td_dma);
601 kfree(req);
602 }
603
604 /*-------------------------------------------------------------------------*/
605
606 /* load a packet into the fifo we use for usb IN transfers.
607 * works for all endpoints.
608 *
609 * NOTE: pio with ep-a..ep-d could stuff multiple packets into the fifo
610 * at a time, but this code is simpler because it knows it only writes
611 * one packet. ep-a..ep-d should use dma instead.
612 */
613 static void write_fifo(struct net2280_ep *ep, struct usb_request *req)
614 {
615 struct net2280_ep_regs __iomem *regs = ep->regs;
616 u8 *buf;
617 u32 tmp;
618 unsigned count, total;
619
620 /* INVARIANT: fifo is currently empty. (testable) */
621
622 if (req) {
623 buf = req->buf + req->actual;
624 prefetch(buf);
625 total = req->length - req->actual;
626 } else {
627 total = 0;
628 buf = NULL;
629 }
630
631 /* write just one packet at a time */
632 count = ep->ep.maxpacket;
633 if (count > total) /* min() cannot be used on a bitfield */
634 count = total;
635
636 ep_vdbg(ep->dev, "write %s fifo (IN) %d bytes%s req %p\n",
637 ep->ep.name, count,
638 (count != ep->ep.maxpacket) ? " (short)" : "",
639 req);
640 while (count >= 4) {
641 /* NOTE be careful if you try to align these. fifo lines
642 * should normally be full (4 bytes) and successive partial
643 * lines are ok only in certain cases.
644 */
645 tmp = get_unaligned((u32 *)buf);
646 cpu_to_le32s(&tmp);
647 writel(tmp, &regs->ep_data);
648 buf += 4;
649 count -= 4;
650 }
651
652 /* last fifo entry is "short" unless we wrote a full packet.
653 * also explicitly validate last word in (periodic) transfers
654 * when maxpacket is not a multiple of 4 bytes.
655 */
656 if (count || total < ep->ep.maxpacket) {
657 tmp = count ? get_unaligned((u32 *)buf) : count;
658 cpu_to_le32s(&tmp);
659 set_fifo_bytecount(ep, count & 0x03);
660 writel(tmp, &regs->ep_data);
661 }
662
663 /* pci writes may still be posted */
664 }
665
666 /* work around erratum 0106: PCI and USB race over the OUT fifo.
667 * caller guarantees chiprev 0100, out endpoint is NAKing, and
668 * there's no real data in the fifo.
669 *
670 * NOTE: also used in cases where that erratum doesn't apply:
671 * where the host wrote "too much" data to us.
672 */
673 static void out_flush(struct net2280_ep *ep)
674 {
675 u32 __iomem *statp;
676 u32 tmp;
677
678 statp = &ep->regs->ep_stat;
679
680 tmp = readl(statp);
681 if (tmp & BIT(NAK_OUT_PACKETS)) {
682 ep_dbg(ep->dev, "%s %s %08x !NAK\n",
683 ep->ep.name, __func__, tmp);
684 writel(BIT(SET_NAK_OUT_PACKETS), &ep->regs->ep_rsp);
685 }
686
687 writel(BIT(DATA_OUT_PING_TOKEN_INTERRUPT) |
688 BIT(DATA_PACKET_RECEIVED_INTERRUPT),
689 statp);
690 writel(BIT(FIFO_FLUSH), statp);
691 /* Make sure that stap is written */
692 mb();
693 tmp = readl(statp);
694 if (tmp & BIT(DATA_OUT_PING_TOKEN_INTERRUPT) &&
695 /* high speed did bulk NYET; fifo isn't filling */
696 ep->dev->gadget.speed == USB_SPEED_FULL) {
697 unsigned usec;
698
699 usec = 50; /* 64 byte bulk/interrupt */
700 handshake(statp, BIT(USB_OUT_PING_NAK_SENT),
701 BIT(USB_OUT_PING_NAK_SENT), usec);
702 /* NAK done; now CLEAR_NAK_OUT_PACKETS is safe */
703 }
704 }
705
706 /* unload packet(s) from the fifo we use for usb OUT transfers.
707 * returns true iff the request completed, because of short packet
708 * or the request buffer having filled with full packets.
709 *
710 * for ep-a..ep-d this will read multiple packets out when they
711 * have been accepted.
712 */
713 static int read_fifo(struct net2280_ep *ep, struct net2280_request *req)
714 {
715 struct net2280_ep_regs __iomem *regs = ep->regs;
716 u8 *buf = req->req.buf + req->req.actual;
717 unsigned count, tmp, is_short;
718 unsigned cleanup = 0, prevent = 0;
719
720 /* erratum 0106 ... packets coming in during fifo reads might
721 * be incompletely rejected. not all cases have workarounds.
722 */
723 if (ep->dev->chiprev == 0x0100 &&
724 ep->dev->gadget.speed == USB_SPEED_FULL) {
725 udelay(1);
726 tmp = readl(&ep->regs->ep_stat);
727 if ((tmp & BIT(NAK_OUT_PACKETS)))
728 cleanup = 1;
729 else if ((tmp & BIT(FIFO_FULL))) {
730 start_out_naking(ep);
731 prevent = 1;
732 }
733 /* else: hope we don't see the problem */
734 }
735
736 /* never overflow the rx buffer. the fifo reads packets until
737 * it sees a short one; we might not be ready for them all.
738 */
739 prefetchw(buf);
740 count = readl(&regs->ep_avail);
741 if (unlikely(count == 0)) {
742 udelay(1);
743 tmp = readl(&ep->regs->ep_stat);
744 count = readl(&regs->ep_avail);
745 /* handled that data already? */
746 if (count == 0 && (tmp & BIT(NAK_OUT_PACKETS)) == 0)
747 return 0;
748 }
749
750 tmp = req->req.length - req->req.actual;
751 if (count > tmp) {
752 /* as with DMA, data overflow gets flushed */
753 if ((tmp % ep->ep.maxpacket) != 0) {
754 ep_err(ep->dev,
755 "%s out fifo %d bytes, expected %d\n",
756 ep->ep.name, count, tmp);
757 req->req.status = -EOVERFLOW;
758 cleanup = 1;
759 /* NAK_OUT_PACKETS will be set, so flushing is safe;
760 * the next read will start with the next packet
761 */
762 } /* else it's a ZLP, no worries */
763 count = tmp;
764 }
765 req->req.actual += count;
766
767 is_short = (count == 0) || ((count % ep->ep.maxpacket) != 0);
768
769 ep_vdbg(ep->dev, "read %s fifo (OUT) %d bytes%s%s%s req %p %d/%d\n",
770 ep->ep.name, count, is_short ? " (short)" : "",
771 cleanup ? " flush" : "", prevent ? " nak" : "",
772 req, req->req.actual, req->req.length);
773
774 while (count >= 4) {
775 tmp = readl(&regs->ep_data);
776 cpu_to_le32s(&tmp);
777 put_unaligned(tmp, (u32 *)buf);
778 buf += 4;
779 count -= 4;
780 }
781 if (count) {
782 tmp = readl(&regs->ep_data);
783 /* LE conversion is implicit here: */
784 do {
785 *buf++ = (u8) tmp;
786 tmp >>= 8;
787 } while (--count);
788 }
789 if (cleanup)
790 out_flush(ep);
791 if (prevent) {
792 writel(BIT(CLEAR_NAK_OUT_PACKETS), &ep->regs->ep_rsp);
793 (void) readl(&ep->regs->ep_rsp);
794 }
795
796 return is_short || ((req->req.actual == req->req.length) &&
797 !req->req.zero);
798 }
799
800 /* fill out dma descriptor to match a given request */
801 static void fill_dma_desc(struct net2280_ep *ep,
802 struct net2280_request *req, int valid)
803 {
804 struct net2280_dma *td = req->td;
805 u32 dmacount = req->req.length;
806
807 /* don't let DMA continue after a short OUT packet,
808 * so overruns can't affect the next transfer.
809 * in case of overruns on max-size packets, we can't
810 * stop the fifo from filling but we can flush it.
811 */
812 if (ep->is_in)
813 dmacount |= BIT(DMA_DIRECTION);
814 if ((!ep->is_in && (dmacount % ep->ep.maxpacket) != 0) ||
815 !(ep->dev->quirks & PLX_2280))
816 dmacount |= BIT(END_OF_CHAIN);
817
818 req->valid = valid;
819 if (valid)
820 dmacount |= BIT(VALID_BIT);
821 dmacount |= BIT(DMA_DONE_INTERRUPT_ENABLE);
822
823 /* td->dmadesc = previously set by caller */
824 td->dmaaddr = cpu_to_le32 (req->req.dma);
825
826 /* 2280 may be polling VALID_BIT through ep->dma->dmadesc */
827 wmb();
828 td->dmacount = cpu_to_le32(dmacount);
829 }
830
831 static const u32 dmactl_default =
832 BIT(DMA_SCATTER_GATHER_DONE_INTERRUPT) |
833 BIT(DMA_CLEAR_COUNT_ENABLE) |
834 /* erratum 0116 workaround part 1 (use POLLING) */
835 (POLL_100_USEC << DESCRIPTOR_POLLING_RATE) |
836 BIT(DMA_VALID_BIT_POLLING_ENABLE) |
837 BIT(DMA_VALID_BIT_ENABLE) |
838 BIT(DMA_SCATTER_GATHER_ENABLE) |
839 /* erratum 0116 workaround part 2 (no AUTOSTART) */
840 BIT(DMA_ENABLE);
841
842 static inline void spin_stop_dma(struct net2280_dma_regs __iomem *dma)
843 {
844 handshake(&dma->dmactl, BIT(DMA_ENABLE), 0, 50);
845 }
846
847 static inline void stop_dma(struct net2280_dma_regs __iomem *dma)
848 {
849 writel(readl(&dma->dmactl) & ~BIT(DMA_ENABLE), &dma->dmactl);
850 spin_stop_dma(dma);
851 }
852
853 static void start_queue(struct net2280_ep *ep, u32 dmactl, u32 td_dma)
854 {
855 struct net2280_dma_regs __iomem *dma = ep->dma;
856 unsigned int tmp = BIT(VALID_BIT) | (ep->is_in << DMA_DIRECTION);
857
858 if (!(ep->dev->quirks & PLX_2280))
859 tmp |= BIT(END_OF_CHAIN);
860
861 writel(tmp, &dma->dmacount);
862 writel(readl(&dma->dmastat), &dma->dmastat);
863
864 writel(td_dma, &dma->dmadesc);
865 if (ep->dev->quirks & PLX_PCIE)
866 dmactl |= BIT(DMA_REQUEST_OUTSTANDING);
867 writel(dmactl, &dma->dmactl);
868
869 /* erratum 0116 workaround part 3: pci arbiter away from net2280 */
870 (void) readl(&ep->dev->pci->pcimstctl);
871
872 writel(BIT(DMA_START), &dma->dmastat);
873
874 if (!ep->is_in)
875 stop_out_naking(ep);
876 }
877
878 static void start_dma(struct net2280_ep *ep, struct net2280_request *req)
879 {
880 u32 tmp;
881 struct net2280_dma_regs __iomem *dma = ep->dma;
882
883 /* FIXME can't use DMA for ZLPs */
884
885 /* on this path we "know" there's no dma active (yet) */
886 WARN_ON(readl(&dma->dmactl) & BIT(DMA_ENABLE));
887 writel(0, &ep->dma->dmactl);
888
889 /* previous OUT packet might have been short */
890 if (!ep->is_in && (readl(&ep->regs->ep_stat) &
891 BIT(NAK_OUT_PACKETS))) {
892 writel(BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT),
893 &ep->regs->ep_stat);
894
895 tmp = readl(&ep->regs->ep_avail);
896 if (tmp) {
897 writel(readl(&dma->dmastat), &dma->dmastat);
898
899 /* transfer all/some fifo data */
900 writel(req->req.dma, &dma->dmaaddr);
901 tmp = min(tmp, req->req.length);
902
903 /* dma irq, faking scatterlist status */
904 req->td->dmacount = cpu_to_le32(req->req.length - tmp);
905 writel(BIT(DMA_DONE_INTERRUPT_ENABLE) | tmp,
906 &dma->dmacount);
907 req->td->dmadesc = 0;
908 req->valid = 1;
909
910 writel(BIT(DMA_ENABLE), &dma->dmactl);
911 writel(BIT(DMA_START), &dma->dmastat);
912 return;
913 }
914 }
915
916 tmp = dmactl_default;
917
918 /* force packet boundaries between dma requests, but prevent the
919 * controller from automagically writing a last "short" packet
920 * (zero length) unless the driver explicitly said to do that.
921 */
922 if (ep->is_in) {
923 if (likely((req->req.length % ep->ep.maxpacket) ||
924 req->req.zero)){
925 tmp |= BIT(DMA_FIFO_VALIDATE);
926 ep->in_fifo_validate = 1;
927 } else
928 ep->in_fifo_validate = 0;
929 }
930
931 /* init req->td, pointing to the current dummy */
932 req->td->dmadesc = cpu_to_le32 (ep->td_dma);
933 fill_dma_desc(ep, req, 1);
934
935 req->td->dmacount |= cpu_to_le32(BIT(END_OF_CHAIN));
936
937 start_queue(ep, tmp, req->td_dma);
938 }
939
940 static inline void
941 queue_dma(struct net2280_ep *ep, struct net2280_request *req, int valid)
942 {
943 struct net2280_dma *end;
944 dma_addr_t tmp;
945
946 /* swap new dummy for old, link; fill and maybe activate */
947 end = ep->dummy;
948 ep->dummy = req->td;
949 req->td = end;
950
951 tmp = ep->td_dma;
952 ep->td_dma = req->td_dma;
953 req->td_dma = tmp;
954
955 end->dmadesc = cpu_to_le32 (ep->td_dma);
956
957 fill_dma_desc(ep, req, valid);
958 }
959
960 static void
961 done(struct net2280_ep *ep, struct net2280_request *req, int status)
962 {
963 struct net2280 *dev;
964 unsigned stopped = ep->stopped;
965
966 list_del_init(&req->queue);
967
968 if (req->req.status == -EINPROGRESS)
969 req->req.status = status;
970 else
971 status = req->req.status;
972
973 dev = ep->dev;
974 if (ep->dma)
975 usb_gadget_unmap_request(&dev->gadget, &req->req, ep->is_in);
976
977 if (status && status != -ESHUTDOWN)
978 ep_vdbg(dev, "complete %s req %p stat %d len %u/%u\n",
979 ep->ep.name, &req->req, status,
980 req->req.actual, req->req.length);
981
982 /* don't modify queue heads during completion callback */
983 ep->stopped = 1;
984 spin_unlock(&dev->lock);
985 usb_gadget_giveback_request(&ep->ep, &req->req);
986 spin_lock(&dev->lock);
987 ep->stopped = stopped;
988 }
989
990 /*-------------------------------------------------------------------------*/
991
992 static int
993 net2280_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
994 {
995 struct net2280_request *req;
996 struct net2280_ep *ep;
997 struct net2280 *dev;
998 unsigned long flags;
999 int ret = 0;
1000
1001 /* we always require a cpu-view buffer, so that we can
1002 * always use pio (as fallback or whatever).
1003 */
1004 ep = container_of(_ep, struct net2280_ep, ep);
1005 if (!_ep || (!ep->desc && ep->num != 0)) {
1006 pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep);
1007 return -EINVAL;
1008 }
1009 req = container_of(_req, struct net2280_request, req);
1010 if (!_req || !_req->complete || !_req->buf ||
1011 !list_empty(&req->queue)) {
1012 ret = -EINVAL;
1013 goto print_err;
1014 }
1015 if (_req->length > (~0 & DMA_BYTE_COUNT_MASK)) {
1016 ret = -EDOM;
1017 goto print_err;
1018 }
1019 dev = ep->dev;
1020 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
1021 ret = -ESHUTDOWN;
1022 goto print_err;
1023 }
1024
1025 /* FIXME implement PIO fallback for ZLPs with DMA */
1026 if (ep->dma && _req->length == 0) {
1027 ret = -EOPNOTSUPP;
1028 goto print_err;
1029 }
1030
1031 /* set up dma mapping in case the caller didn't */
1032 if (ep->dma) {
1033 ret = usb_gadget_map_request(&dev->gadget, _req,
1034 ep->is_in);
1035 if (ret)
1036 goto print_err;
1037 }
1038
1039 ep_vdbg(dev, "%s queue req %p, len %d buf %p\n",
1040 _ep->name, _req, _req->length, _req->buf);
1041
1042 spin_lock_irqsave(&dev->lock, flags);
1043
1044 _req->status = -EINPROGRESS;
1045 _req->actual = 0;
1046
1047 /* kickstart this i/o queue? */
1048 if (list_empty(&ep->queue) && !ep->stopped &&
1049 !((dev->quirks & PLX_PCIE) && ep->dma &&
1050 (readl(&ep->regs->ep_rsp) & BIT(CLEAR_ENDPOINT_HALT)))) {
1051
1052 /* use DMA if the endpoint supports it, else pio */
1053 if (ep->dma)
1054 start_dma(ep, req);
1055 else {
1056 /* maybe there's no control data, just status ack */
1057 if (ep->num == 0 && _req->length == 0) {
1058 allow_status(ep);
1059 done(ep, req, 0);
1060 ep_vdbg(dev, "%s status ack\n", ep->ep.name);
1061 goto done;
1062 }
1063
1064 /* PIO ... stuff the fifo, or unblock it. */
1065 if (ep->is_in)
1066 write_fifo(ep, _req);
1067 else if (list_empty(&ep->queue)) {
1068 u32 s;
1069
1070 /* OUT FIFO might have packet(s) buffered */
1071 s = readl(&ep->regs->ep_stat);
1072 if ((s & BIT(FIFO_EMPTY)) == 0) {
1073 /* note: _req->short_not_ok is
1074 * ignored here since PIO _always_
1075 * stops queue advance here, and
1076 * _req->status doesn't change for
1077 * short reads (only _req->actual)
1078 */
1079 if (read_fifo(ep, req) &&
1080 ep->num == 0) {
1081 done(ep, req, 0);
1082 allow_status(ep);
1083 /* don't queue it */
1084 req = NULL;
1085 } else if (read_fifo(ep, req) &&
1086 ep->num != 0) {
1087 done(ep, req, 0);
1088 req = NULL;
1089 } else
1090 s = readl(&ep->regs->ep_stat);
1091 }
1092
1093 /* don't NAK, let the fifo fill */
1094 if (req && (s & BIT(NAK_OUT_PACKETS)))
1095 writel(BIT(CLEAR_NAK_OUT_PACKETS),
1096 &ep->regs->ep_rsp);
1097 }
1098 }
1099
1100 } else if (ep->dma) {
1101 int valid = 1;
1102
1103 if (ep->is_in) {
1104 int expect;
1105
1106 /* preventing magic zlps is per-engine state, not
1107 * per-transfer; irq logic must recover hiccups.
1108 */
1109 expect = likely(req->req.zero ||
1110 (req->req.length % ep->ep.maxpacket));
1111 if (expect != ep->in_fifo_validate)
1112 valid = 0;
1113 }
1114 queue_dma(ep, req, valid);
1115
1116 } /* else the irq handler advances the queue. */
1117
1118 ep->responded = 1;
1119 if (req)
1120 list_add_tail(&req->queue, &ep->queue);
1121 done:
1122 spin_unlock_irqrestore(&dev->lock, flags);
1123
1124 /* pci writes may still be posted */
1125 return ret;
1126
1127 print_err:
1128 dev_err(&ep->dev->pdev->dev, "%s: error=%d\n", __func__, ret);
1129 return ret;
1130 }
1131
1132 static inline void
1133 dma_done(struct net2280_ep *ep, struct net2280_request *req, u32 dmacount,
1134 int status)
1135 {
1136 req->req.actual = req->req.length - (DMA_BYTE_COUNT_MASK & dmacount);
1137 done(ep, req, status);
1138 }
1139
1140 static void scan_dma_completions(struct net2280_ep *ep)
1141 {
1142 /* only look at descriptors that were "naturally" retired,
1143 * so fifo and list head state won't matter
1144 */
1145 while (!list_empty(&ep->queue)) {
1146 struct net2280_request *req;
1147 u32 tmp;
1148
1149 req = list_entry(ep->queue.next,
1150 struct net2280_request, queue);
1151 if (!req->valid)
1152 break;
1153 rmb();
1154 tmp = le32_to_cpup(&req->td->dmacount);
1155 if ((tmp & BIT(VALID_BIT)) != 0)
1156 break;
1157
1158 /* SHORT_PACKET_TRANSFERRED_INTERRUPT handles "usb-short"
1159 * cases where DMA must be aborted; this code handles
1160 * all non-abort DMA completions.
1161 */
1162 if (unlikely(req->td->dmadesc == 0)) {
1163 /* paranoia */
1164 tmp = readl(&ep->dma->dmacount);
1165 if (tmp & DMA_BYTE_COUNT_MASK)
1166 break;
1167 /* single transfer mode */
1168 dma_done(ep, req, tmp, 0);
1169 break;
1170 } else if (!ep->is_in &&
1171 (req->req.length % ep->ep.maxpacket) &&
1172 !(ep->dev->quirks & PLX_PCIE)) {
1173
1174 tmp = readl(&ep->regs->ep_stat);
1175 /* AVOID TROUBLE HERE by not issuing short reads from
1176 * your gadget driver. That helps avoids errata 0121,
1177 * 0122, and 0124; not all cases trigger the warning.
1178 */
1179 if ((tmp & BIT(NAK_OUT_PACKETS)) == 0) {
1180 ep_warn(ep->dev, "%s lost packet sync!\n",
1181 ep->ep.name);
1182 req->req.status = -EOVERFLOW;
1183 } else {
1184 tmp = readl(&ep->regs->ep_avail);
1185 if (tmp) {
1186 /* fifo gets flushed later */
1187 ep->out_overflow = 1;
1188 ep_dbg(ep->dev,
1189 "%s dma, discard %d len %d\n",
1190 ep->ep.name, tmp,
1191 req->req.length);
1192 req->req.status = -EOVERFLOW;
1193 }
1194 }
1195 }
1196 dma_done(ep, req, tmp, 0);
1197 }
1198 }
1199
1200 static void restart_dma(struct net2280_ep *ep)
1201 {
1202 struct net2280_request *req;
1203
1204 if (ep->stopped)
1205 return;
1206 req = list_entry(ep->queue.next, struct net2280_request, queue);
1207
1208 start_dma(ep, req);
1209 }
1210
1211 static void abort_dma(struct net2280_ep *ep)
1212 {
1213 /* abort the current transfer */
1214 if (likely(!list_empty(&ep->queue))) {
1215 /* FIXME work around errata 0121, 0122, 0124 */
1216 writel(BIT(DMA_ABORT), &ep->dma->dmastat);
1217 spin_stop_dma(ep->dma);
1218 } else
1219 stop_dma(ep->dma);
1220 scan_dma_completions(ep);
1221 }
1222
1223 /* dequeue ALL requests */
1224 static void nuke(struct net2280_ep *ep)
1225 {
1226 struct net2280_request *req;
1227
1228 /* called with spinlock held */
1229 ep->stopped = 1;
1230 if (ep->dma)
1231 abort_dma(ep);
1232 while (!list_empty(&ep->queue)) {
1233 req = list_entry(ep->queue.next,
1234 struct net2280_request,
1235 queue);
1236 done(ep, req, -ESHUTDOWN);
1237 }
1238 }
1239
1240 /* dequeue JUST ONE request */
1241 static int net2280_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1242 {
1243 struct net2280_ep *ep;
1244 struct net2280_request *req;
1245 unsigned long flags;
1246 u32 dmactl;
1247 int stopped;
1248
1249 ep = container_of(_ep, struct net2280_ep, ep);
1250 if (!_ep || (!ep->desc && ep->num != 0) || !_req) {
1251 pr_err("%s: Invalid ep=%p or ep->desc or req=%p\n",
1252 __func__, _ep, _req);
1253 return -EINVAL;
1254 }
1255
1256 spin_lock_irqsave(&ep->dev->lock, flags);
1257 stopped = ep->stopped;
1258
1259 /* quiesce dma while we patch the queue */
1260 dmactl = 0;
1261 ep->stopped = 1;
1262 if (ep->dma) {
1263 dmactl = readl(&ep->dma->dmactl);
1264 /* WARNING erratum 0127 may kick in ... */
1265 stop_dma(ep->dma);
1266 scan_dma_completions(ep);
1267 }
1268
1269 /* make sure it's still queued on this endpoint */
1270 list_for_each_entry(req, &ep->queue, queue) {
1271 if (&req->req == _req)
1272 break;
1273 }
1274 if (&req->req != _req) {
1275 spin_unlock_irqrestore(&ep->dev->lock, flags);
1276 dev_err(&ep->dev->pdev->dev, "%s: Request mismatch\n",
1277 __func__);
1278 return -EINVAL;
1279 }
1280
1281 /* queue head may be partially complete. */
1282 if (ep->queue.next == &req->queue) {
1283 if (ep->dma) {
1284 ep_dbg(ep->dev, "unlink (%s) dma\n", _ep->name);
1285 _req->status = -ECONNRESET;
1286 abort_dma(ep);
1287 if (likely(ep->queue.next == &req->queue)) {
1288 /* NOTE: misreports single-transfer mode*/
1289 req->td->dmacount = 0; /* invalidate */
1290 dma_done(ep, req,
1291 readl(&ep->dma->dmacount),
1292 -ECONNRESET);
1293 }
1294 } else {
1295 ep_dbg(ep->dev, "unlink (%s) pio\n", _ep->name);
1296 done(ep, req, -ECONNRESET);
1297 }
1298 req = NULL;
1299 }
1300
1301 if (req)
1302 done(ep, req, -ECONNRESET);
1303 ep->stopped = stopped;
1304
1305 if (ep->dma) {
1306 /* turn off dma on inactive queues */
1307 if (list_empty(&ep->queue))
1308 stop_dma(ep->dma);
1309 else if (!ep->stopped) {
1310 /* resume current request, or start new one */
1311 if (req)
1312 writel(dmactl, &ep->dma->dmactl);
1313 else
1314 start_dma(ep, list_entry(ep->queue.next,
1315 struct net2280_request, queue));
1316 }
1317 }
1318
1319 spin_unlock_irqrestore(&ep->dev->lock, flags);
1320 return 0;
1321 }
1322
1323 /*-------------------------------------------------------------------------*/
1324
1325 static int net2280_fifo_status(struct usb_ep *_ep);
1326
1327 static int
1328 net2280_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged)
1329 {
1330 struct net2280_ep *ep;
1331 unsigned long flags;
1332 int retval = 0;
1333
1334 ep = container_of(_ep, struct net2280_ep, ep);
1335 if (!_ep || (!ep->desc && ep->num != 0)) {
1336 pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep);
1337 return -EINVAL;
1338 }
1339 if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) {
1340 retval = -ESHUTDOWN;
1341 goto print_err;
1342 }
1343 if (ep->desc /* not ep0 */ && (ep->desc->bmAttributes & 0x03)
1344 == USB_ENDPOINT_XFER_ISOC) {
1345 retval = -EINVAL;
1346 goto print_err;
1347 }
1348
1349 spin_lock_irqsave(&ep->dev->lock, flags);
1350 if (!list_empty(&ep->queue)) {
1351 retval = -EAGAIN;
1352 goto print_unlock;
1353 } else if (ep->is_in && value && net2280_fifo_status(_ep) != 0) {
1354 retval = -EAGAIN;
1355 goto print_unlock;
1356 } else {
1357 ep_vdbg(ep->dev, "%s %s %s\n", _ep->name,
1358 value ? "set" : "clear",
1359 wedged ? "wedge" : "halt");
1360 /* set/clear, then synch memory views with the device */
1361 if (value) {
1362 if (ep->num == 0)
1363 ep->dev->protocol_stall = 1;
1364 else
1365 set_halt(ep);
1366 if (wedged)
1367 ep->wedged = 1;
1368 } else {
1369 clear_halt(ep);
1370 if (ep->dev->quirks & PLX_PCIE &&
1371 !list_empty(&ep->queue) && ep->td_dma)
1372 restart_dma(ep);
1373 ep->wedged = 0;
1374 }
1375 (void) readl(&ep->regs->ep_rsp);
1376 }
1377 spin_unlock_irqrestore(&ep->dev->lock, flags);
1378
1379 return retval;
1380
1381 print_unlock:
1382 spin_unlock_irqrestore(&ep->dev->lock, flags);
1383 print_err:
1384 dev_err(&ep->dev->pdev->dev, "%s: error=%d\n", __func__, retval);
1385 return retval;
1386 }
1387
1388 static int net2280_set_halt(struct usb_ep *_ep, int value)
1389 {
1390 return net2280_set_halt_and_wedge(_ep, value, 0);
1391 }
1392
1393 static int net2280_set_wedge(struct usb_ep *_ep)
1394 {
1395 if (!_ep || _ep->name == ep0name) {
1396 pr_err("%s: Invalid ep=%p or ep0\n", __func__, _ep);
1397 return -EINVAL;
1398 }
1399 return net2280_set_halt_and_wedge(_ep, 1, 1);
1400 }
1401
1402 static int net2280_fifo_status(struct usb_ep *_ep)
1403 {
1404 struct net2280_ep *ep;
1405 u32 avail;
1406
1407 ep = container_of(_ep, struct net2280_ep, ep);
1408 if (!_ep || (!ep->desc && ep->num != 0)) {
1409 pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep);
1410 return -ENODEV;
1411 }
1412 if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) {
1413 dev_err(&ep->dev->pdev->dev,
1414 "%s: Invalid driver=%p or speed=%d\n",
1415 __func__, ep->dev->driver, ep->dev->gadget.speed);
1416 return -ESHUTDOWN;
1417 }
1418
1419 avail = readl(&ep->regs->ep_avail) & (BIT(12) - 1);
1420 if (avail > ep->fifo_size) {
1421 dev_err(&ep->dev->pdev->dev, "%s: Fifo overflow\n", __func__);
1422 return -EOVERFLOW;
1423 }
1424 if (ep->is_in)
1425 avail = ep->fifo_size - avail;
1426 return avail;
1427 }
1428
1429 static void net2280_fifo_flush(struct usb_ep *_ep)
1430 {
1431 struct net2280_ep *ep;
1432
1433 ep = container_of(_ep, struct net2280_ep, ep);
1434 if (!_ep || (!ep->desc && ep->num != 0)) {
1435 pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep);
1436 return;
1437 }
1438 if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) {
1439 dev_err(&ep->dev->pdev->dev,
1440 "%s: Invalid driver=%p or speed=%d\n",
1441 __func__, ep->dev->driver, ep->dev->gadget.speed);
1442 return;
1443 }
1444
1445 writel(BIT(FIFO_FLUSH), &ep->regs->ep_stat);
1446 (void) readl(&ep->regs->ep_rsp);
1447 }
1448
1449 static const struct usb_ep_ops net2280_ep_ops = {
1450 .enable = net2280_enable,
1451 .disable = net2280_disable,
1452
1453 .alloc_request = net2280_alloc_request,
1454 .free_request = net2280_free_request,
1455
1456 .queue = net2280_queue,
1457 .dequeue = net2280_dequeue,
1458
1459 .set_halt = net2280_set_halt,
1460 .set_wedge = net2280_set_wedge,
1461 .fifo_status = net2280_fifo_status,
1462 .fifo_flush = net2280_fifo_flush,
1463 };
1464
1465 /*-------------------------------------------------------------------------*/
1466
1467 static int net2280_get_frame(struct usb_gadget *_gadget)
1468 {
1469 struct net2280 *dev;
1470 unsigned long flags;
1471 u16 retval;
1472
1473 if (!_gadget)
1474 return -ENODEV;
1475 dev = container_of(_gadget, struct net2280, gadget);
1476 spin_lock_irqsave(&dev->lock, flags);
1477 retval = get_idx_reg(dev->regs, REG_FRAME) & 0x03ff;
1478 spin_unlock_irqrestore(&dev->lock, flags);
1479 return retval;
1480 }
1481
1482 static int net2280_wakeup(struct usb_gadget *_gadget)
1483 {
1484 struct net2280 *dev;
1485 u32 tmp;
1486 unsigned long flags;
1487
1488 if (!_gadget)
1489 return 0;
1490 dev = container_of(_gadget, struct net2280, gadget);
1491
1492 spin_lock_irqsave(&dev->lock, flags);
1493 tmp = readl(&dev->usb->usbctl);
1494 if (tmp & BIT(DEVICE_REMOTE_WAKEUP_ENABLE))
1495 writel(BIT(GENERATE_RESUME), &dev->usb->usbstat);
1496 spin_unlock_irqrestore(&dev->lock, flags);
1497
1498 /* pci writes may still be posted */
1499 return 0;
1500 }
1501
1502 static int net2280_set_selfpowered(struct usb_gadget *_gadget, int value)
1503 {
1504 struct net2280 *dev;
1505 u32 tmp;
1506 unsigned long flags;
1507
1508 if (!_gadget)
1509 return 0;
1510 dev = container_of(_gadget, struct net2280, gadget);
1511
1512 spin_lock_irqsave(&dev->lock, flags);
1513 tmp = readl(&dev->usb->usbctl);
1514 if (value) {
1515 tmp |= BIT(SELF_POWERED_STATUS);
1516 _gadget->is_selfpowered = 1;
1517 } else {
1518 tmp &= ~BIT(SELF_POWERED_STATUS);
1519 _gadget->is_selfpowered = 0;
1520 }
1521 writel(tmp, &dev->usb->usbctl);
1522 spin_unlock_irqrestore(&dev->lock, flags);
1523
1524 return 0;
1525 }
1526
1527 static int net2280_pullup(struct usb_gadget *_gadget, int is_on)
1528 {
1529 struct net2280 *dev;
1530 u32 tmp;
1531 unsigned long flags;
1532
1533 if (!_gadget)
1534 return -ENODEV;
1535 dev = container_of(_gadget, struct net2280, gadget);
1536
1537 spin_lock_irqsave(&dev->lock, flags);
1538 tmp = readl(&dev->usb->usbctl);
1539 dev->softconnect = (is_on != 0);
1540 if (is_on) {
1541 ep0_start(dev);
1542 writel(tmp | BIT(USB_DETECT_ENABLE), &dev->usb->usbctl);
1543 } else {
1544 writel(tmp & ~BIT(USB_DETECT_ENABLE), &dev->usb->usbctl);
1545 stop_activity(dev, dev->driver);
1546 }
1547
1548 spin_unlock_irqrestore(&dev->lock, flags);
1549
1550 return 0;
1551 }
1552
1553 static struct usb_ep *net2280_match_ep(struct usb_gadget *_gadget,
1554 struct usb_endpoint_descriptor *desc,
1555 struct usb_ss_ep_comp_descriptor *ep_comp)
1556 {
1557 char name[8];
1558 struct usb_ep *ep;
1559
1560 if (usb_endpoint_type(desc) == USB_ENDPOINT_XFER_INT) {
1561 /* ep-e, ep-f are PIO with only 64 byte fifos */
1562 ep = gadget_find_ep_by_name(_gadget, "ep-e");
1563 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp))
1564 return ep;
1565 ep = gadget_find_ep_by_name(_gadget, "ep-f");
1566 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp))
1567 return ep;
1568 }
1569
1570 /* USB3380: use same address for usb and hardware endpoints */
1571 snprintf(name, sizeof(name), "ep%d%s", usb_endpoint_num(desc),
1572 usb_endpoint_dir_in(desc) ? "in" : "out");
1573 ep = gadget_find_ep_by_name(_gadget, name);
1574 if (ep && usb_gadget_ep_match_desc(_gadget, ep, desc, ep_comp))
1575 return ep;
1576
1577 return NULL;
1578 }
1579
1580 static int net2280_start(struct usb_gadget *_gadget,
1581 struct usb_gadget_driver *driver);
1582 static int net2280_stop(struct usb_gadget *_gadget);
1583
1584 static const struct usb_gadget_ops net2280_ops = {
1585 .get_frame = net2280_get_frame,
1586 .wakeup = net2280_wakeup,
1587 .set_selfpowered = net2280_set_selfpowered,
1588 .pullup = net2280_pullup,
1589 .udc_start = net2280_start,
1590 .udc_stop = net2280_stop,
1591 .match_ep = net2280_match_ep,
1592 };
1593
1594 /*-------------------------------------------------------------------------*/
1595
1596 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1597
1598 /* FIXME move these into procfs, and use seq_file.
1599 * Sysfs _still_ doesn't behave for arbitrarily sized files,
1600 * and also doesn't help products using this with 2.4 kernels.
1601 */
1602
1603 /* "function" sysfs attribute */
1604 static ssize_t function_show(struct device *_dev, struct device_attribute *attr,
1605 char *buf)
1606 {
1607 struct net2280 *dev = dev_get_drvdata(_dev);
1608
1609 if (!dev->driver || !dev->driver->function ||
1610 strlen(dev->driver->function) > PAGE_SIZE)
1611 return 0;
1612 return scnprintf(buf, PAGE_SIZE, "%s\n", dev->driver->function);
1613 }
1614 static DEVICE_ATTR_RO(function);
1615
1616 static ssize_t registers_show(struct device *_dev,
1617 struct device_attribute *attr, char *buf)
1618 {
1619 struct net2280 *dev;
1620 char *next;
1621 unsigned size, t;
1622 unsigned long flags;
1623 int i;
1624 u32 t1, t2;
1625 const char *s;
1626
1627 dev = dev_get_drvdata(_dev);
1628 next = buf;
1629 size = PAGE_SIZE;
1630 spin_lock_irqsave(&dev->lock, flags);
1631
1632 if (dev->driver)
1633 s = dev->driver->driver.name;
1634 else
1635 s = "(none)";
1636
1637 /* Main Control Registers */
1638 t = scnprintf(next, size, "%s version " DRIVER_VERSION
1639 ", chiprev %04x\n\n"
1640 "devinit %03x fifoctl %08x gadget '%s'\n"
1641 "pci irqenb0 %02x irqenb1 %08x "
1642 "irqstat0 %04x irqstat1 %08x\n",
1643 driver_name, dev->chiprev,
1644 readl(&dev->regs->devinit),
1645 readl(&dev->regs->fifoctl),
1646 s,
1647 readl(&dev->regs->pciirqenb0),
1648 readl(&dev->regs->pciirqenb1),
1649 readl(&dev->regs->irqstat0),
1650 readl(&dev->regs->irqstat1));
1651 size -= t;
1652 next += t;
1653
1654 /* USB Control Registers */
1655 t1 = readl(&dev->usb->usbctl);
1656 t2 = readl(&dev->usb->usbstat);
1657 if (t1 & BIT(VBUS_PIN)) {
1658 if (t2 & BIT(HIGH_SPEED))
1659 s = "high speed";
1660 else if (dev->gadget.speed == USB_SPEED_UNKNOWN)
1661 s = "powered";
1662 else
1663 s = "full speed";
1664 /* full speed bit (6) not working?? */
1665 } else
1666 s = "not attached";
1667 t = scnprintf(next, size,
1668 "stdrsp %08x usbctl %08x usbstat %08x "
1669 "addr 0x%02x (%s)\n",
1670 readl(&dev->usb->stdrsp), t1, t2,
1671 readl(&dev->usb->ouraddr), s);
1672 size -= t;
1673 next += t;
1674
1675 /* PCI Master Control Registers */
1676
1677 /* DMA Control Registers */
1678
1679 /* Configurable EP Control Registers */
1680 for (i = 0; i < dev->n_ep; i++) {
1681 struct net2280_ep *ep;
1682
1683 ep = &dev->ep[i];
1684 if (i && !ep->desc)
1685 continue;
1686
1687 t1 = readl(&ep->cfg->ep_cfg);
1688 t2 = readl(&ep->regs->ep_rsp) & 0xff;
1689 t = scnprintf(next, size,
1690 "\n%s\tcfg %05x rsp (%02x) %s%s%s%s%s%s%s%s"
1691 "irqenb %02x\n",
1692 ep->ep.name, t1, t2,
1693 (t2 & BIT(CLEAR_NAK_OUT_PACKETS))
1694 ? "NAK " : "",
1695 (t2 & BIT(CLEAR_EP_HIDE_STATUS_PHASE))
1696 ? "hide " : "",
1697 (t2 & BIT(CLEAR_EP_FORCE_CRC_ERROR))
1698 ? "CRC " : "",
1699 (t2 & BIT(CLEAR_INTERRUPT_MODE))
1700 ? "interrupt " : "",
1701 (t2 & BIT(CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE))
1702 ? "status " : "",
1703 (t2 & BIT(CLEAR_NAK_OUT_PACKETS_MODE))
1704 ? "NAKmode " : "",
1705 (t2 & BIT(CLEAR_ENDPOINT_TOGGLE))
1706 ? "DATA1 " : "DATA0 ",
1707 (t2 & BIT(CLEAR_ENDPOINT_HALT))
1708 ? "HALT " : "",
1709 readl(&ep->regs->ep_irqenb));
1710 size -= t;
1711 next += t;
1712
1713 t = scnprintf(next, size,
1714 "\tstat %08x avail %04x "
1715 "(ep%d%s-%s)%s\n",
1716 readl(&ep->regs->ep_stat),
1717 readl(&ep->regs->ep_avail),
1718 t1 & 0x0f, DIR_STRING(t1),
1719 type_string(t1 >> 8),
1720 ep->stopped ? "*" : "");
1721 size -= t;
1722 next += t;
1723
1724 if (!ep->dma)
1725 continue;
1726
1727 t = scnprintf(next, size,
1728 " dma\tctl %08x stat %08x count %08x\n"
1729 "\taddr %08x desc %08x\n",
1730 readl(&ep->dma->dmactl),
1731 readl(&ep->dma->dmastat),
1732 readl(&ep->dma->dmacount),
1733 readl(&ep->dma->dmaaddr),
1734 readl(&ep->dma->dmadesc));
1735 size -= t;
1736 next += t;
1737
1738 }
1739
1740 /* Indexed Registers (none yet) */
1741
1742 /* Statistics */
1743 t = scnprintf(next, size, "\nirqs: ");
1744 size -= t;
1745 next += t;
1746 for (i = 0; i < dev->n_ep; i++) {
1747 struct net2280_ep *ep;
1748
1749 ep = &dev->ep[i];
1750 if (i && !ep->irqs)
1751 continue;
1752 t = scnprintf(next, size, " %s/%lu", ep->ep.name, ep->irqs);
1753 size -= t;
1754 next += t;
1755
1756 }
1757 t = scnprintf(next, size, "\n");
1758 size -= t;
1759 next += t;
1760
1761 spin_unlock_irqrestore(&dev->lock, flags);
1762
1763 return PAGE_SIZE - size;
1764 }
1765 static DEVICE_ATTR_RO(registers);
1766
1767 static ssize_t queues_show(struct device *_dev, struct device_attribute *attr,
1768 char *buf)
1769 {
1770 struct net2280 *dev;
1771 char *next;
1772 unsigned size;
1773 unsigned long flags;
1774 int i;
1775
1776 dev = dev_get_drvdata(_dev);
1777 next = buf;
1778 size = PAGE_SIZE;
1779 spin_lock_irqsave(&dev->lock, flags);
1780
1781 for (i = 0; i < dev->n_ep; i++) {
1782 struct net2280_ep *ep = &dev->ep[i];
1783 struct net2280_request *req;
1784 int t;
1785
1786 if (i != 0) {
1787 const struct usb_endpoint_descriptor *d;
1788
1789 d = ep->desc;
1790 if (!d)
1791 continue;
1792 t = d->bEndpointAddress;
1793 t = scnprintf(next, size,
1794 "\n%s (ep%d%s-%s) max %04x %s fifo %d\n",
1795 ep->ep.name, t & USB_ENDPOINT_NUMBER_MASK,
1796 (t & USB_DIR_IN) ? "in" : "out",
1797 type_string(d->bmAttributes),
1798 usb_endpoint_maxp(d) & 0x1fff,
1799 ep->dma ? "dma" : "pio", ep->fifo_size
1800 );
1801 } else /* ep0 should only have one transfer queued */
1802 t = scnprintf(next, size, "ep0 max 64 pio %s\n",
1803 ep->is_in ? "in" : "out");
1804 if (t <= 0 || t > size)
1805 goto done;
1806 size -= t;
1807 next += t;
1808
1809 if (list_empty(&ep->queue)) {
1810 t = scnprintf(next, size, "\t(nothing queued)\n");
1811 if (t <= 0 || t > size)
1812 goto done;
1813 size -= t;
1814 next += t;
1815 continue;
1816 }
1817 list_for_each_entry(req, &ep->queue, queue) {
1818 if (ep->dma && req->td_dma == readl(&ep->dma->dmadesc))
1819 t = scnprintf(next, size,
1820 "\treq %p len %d/%d "
1821 "buf %p (dmacount %08x)\n",
1822 &req->req, req->req.actual,
1823 req->req.length, req->req.buf,
1824 readl(&ep->dma->dmacount));
1825 else
1826 t = scnprintf(next, size,
1827 "\treq %p len %d/%d buf %p\n",
1828 &req->req, req->req.actual,
1829 req->req.length, req->req.buf);
1830 if (t <= 0 || t > size)
1831 goto done;
1832 size -= t;
1833 next += t;
1834
1835 if (ep->dma) {
1836 struct net2280_dma *td;
1837
1838 td = req->td;
1839 t = scnprintf(next, size, "\t td %08x "
1840 " count %08x buf %08x desc %08x\n",
1841 (u32) req->td_dma,
1842 le32_to_cpu(td->dmacount),
1843 le32_to_cpu(td->dmaaddr),
1844 le32_to_cpu(td->dmadesc));
1845 if (t <= 0 || t > size)
1846 goto done;
1847 size -= t;
1848 next += t;
1849 }
1850 }
1851 }
1852
1853 done:
1854 spin_unlock_irqrestore(&dev->lock, flags);
1855 return PAGE_SIZE - size;
1856 }
1857 static DEVICE_ATTR_RO(queues);
1858
1859
1860 #else
1861
1862 #define device_create_file(a, b) (0)
1863 #define device_remove_file(a, b) do { } while (0)
1864
1865 #endif
1866
1867 /*-------------------------------------------------------------------------*/
1868
1869 /* another driver-specific mode might be a request type doing dma
1870 * to/from another device fifo instead of to/from memory.
1871 */
1872
1873 static void set_fifo_mode(struct net2280 *dev, int mode)
1874 {
1875 /* keeping high bits preserves BAR2 */
1876 writel((0xffff << PCI_BASE2_RANGE) | mode, &dev->regs->fifoctl);
1877
1878 /* always ep-{a,b,e,f} ... maybe not ep-c or ep-d */
1879 INIT_LIST_HEAD(&dev->gadget.ep_list);
1880 list_add_tail(&dev->ep[1].ep.ep_list, &dev->gadget.ep_list);
1881 list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list);
1882 switch (mode) {
1883 case 0:
1884 list_add_tail(&dev->ep[3].ep.ep_list, &dev->gadget.ep_list);
1885 list_add_tail(&dev->ep[4].ep.ep_list, &dev->gadget.ep_list);
1886 dev->ep[1].fifo_size = dev->ep[2].fifo_size = 1024;
1887 break;
1888 case 1:
1889 dev->ep[1].fifo_size = dev->ep[2].fifo_size = 2048;
1890 break;
1891 case 2:
1892 list_add_tail(&dev->ep[3].ep.ep_list, &dev->gadget.ep_list);
1893 dev->ep[1].fifo_size = 2048;
1894 dev->ep[2].fifo_size = 1024;
1895 break;
1896 }
1897 /* fifo sizes for ep0, ep-c, ep-d, ep-e, and ep-f never change */
1898 list_add_tail(&dev->ep[5].ep.ep_list, &dev->gadget.ep_list);
1899 list_add_tail(&dev->ep[6].ep.ep_list, &dev->gadget.ep_list);
1900 }
1901
1902 static void defect7374_disable_data_eps(struct net2280 *dev)
1903 {
1904 /*
1905 * For Defect 7374, disable data EPs (and more):
1906 * - This phase undoes the earlier phase of the Defect 7374 workaround,
1907 * returing ep regs back to normal.
1908 */
1909 struct net2280_ep *ep;
1910 int i;
1911 unsigned char ep_sel;
1912 u32 tmp_reg;
1913
1914 for (i = 1; i < 5; i++) {
1915 ep = &dev->ep[i];
1916 writel(i, &ep->cfg->ep_cfg);
1917 }
1918
1919 /* CSROUT, CSRIN, PCIOUT, PCIIN, STATIN, RCIN */
1920 for (i = 0; i < 6; i++)
1921 writel(0, &dev->dep[i].dep_cfg);
1922
1923 for (ep_sel = 0; ep_sel <= 21; ep_sel++) {
1924 /* Select an endpoint for subsequent operations: */
1925 tmp_reg = readl(&dev->plregs->pl_ep_ctrl);
1926 writel(((tmp_reg & ~0x1f) | ep_sel), &dev->plregs->pl_ep_ctrl);
1927
1928 if (ep_sel < 2 || (ep_sel > 9 && ep_sel < 14) ||
1929 ep_sel == 18 || ep_sel == 20)
1930 continue;
1931
1932 /* Change settings on some selected endpoints */
1933 tmp_reg = readl(&dev->plregs->pl_ep_cfg_4);
1934 tmp_reg &= ~BIT(NON_CTRL_IN_TOLERATE_BAD_DIR);
1935 writel(tmp_reg, &dev->plregs->pl_ep_cfg_4);
1936 tmp_reg = readl(&dev->plregs->pl_ep_ctrl);
1937 tmp_reg |= BIT(EP_INITIALIZED);
1938 writel(tmp_reg, &dev->plregs->pl_ep_ctrl);
1939 }
1940 }
1941
1942 static void defect7374_enable_data_eps_zero(struct net2280 *dev)
1943 {
1944 u32 tmp = 0, tmp_reg;
1945 u32 scratch;
1946 int i;
1947 unsigned char ep_sel;
1948
1949 scratch = get_idx_reg(dev->regs, SCRATCH);
1950
1951 WARN_ON((scratch & (0xf << DEFECT7374_FSM_FIELD))
1952 == DEFECT7374_FSM_SS_CONTROL_READ);
1953
1954 scratch &= ~(0xf << DEFECT7374_FSM_FIELD);
1955
1956 ep_warn(dev, "Operate Defect 7374 workaround soft this time");
1957 ep_warn(dev, "It will operate on cold-reboot and SS connect");
1958
1959 /*GPEPs:*/
1960 tmp = ((0 << ENDPOINT_NUMBER) | BIT(ENDPOINT_DIRECTION) |
1961 (2 << OUT_ENDPOINT_TYPE) | (2 << IN_ENDPOINT_TYPE) |
1962 ((dev->enhanced_mode) ?
1963 BIT(OUT_ENDPOINT_ENABLE) | BIT(IN_ENDPOINT_ENABLE) :
1964 BIT(ENDPOINT_ENABLE)));
1965
1966 for (i = 1; i < 5; i++)
1967 writel(tmp, &dev->ep[i].cfg->ep_cfg);
1968
1969 /* CSRIN, PCIIN, STATIN, RCIN*/
1970 tmp = ((0 << ENDPOINT_NUMBER) | BIT(ENDPOINT_ENABLE));
1971 writel(tmp, &dev->dep[1].dep_cfg);
1972 writel(tmp, &dev->dep[3].dep_cfg);
1973 writel(tmp, &dev->dep[4].dep_cfg);
1974 writel(tmp, &dev->dep[5].dep_cfg);
1975
1976 /*Implemented for development and debug.
1977 * Can be refined/tuned later.*/
1978 for (ep_sel = 0; ep_sel <= 21; ep_sel++) {
1979 /* Select an endpoint for subsequent operations: */
1980 tmp_reg = readl(&dev->plregs->pl_ep_ctrl);
1981 writel(((tmp_reg & ~0x1f) | ep_sel),
1982 &dev->plregs->pl_ep_ctrl);
1983
1984 if (ep_sel == 1) {
1985 tmp =
1986 (readl(&dev->plregs->pl_ep_ctrl) |
1987 BIT(CLEAR_ACK_ERROR_CODE) | 0);
1988 writel(tmp, &dev->plregs->pl_ep_ctrl);
1989 continue;
1990 }
1991
1992 if (ep_sel == 0 || (ep_sel > 9 && ep_sel < 14) ||
1993 ep_sel == 18 || ep_sel == 20)
1994 continue;
1995
1996 tmp = (readl(&dev->plregs->pl_ep_cfg_4) |
1997 BIT(NON_CTRL_IN_TOLERATE_BAD_DIR) | 0);
1998 writel(tmp, &dev->plregs->pl_ep_cfg_4);
1999
2000 tmp = readl(&dev->plregs->pl_ep_ctrl) &
2001 ~BIT(EP_INITIALIZED);
2002 writel(tmp, &dev->plregs->pl_ep_ctrl);
2003
2004 }
2005
2006 /* Set FSM to focus on the first Control Read:
2007 * - Tip: Connection speed is known upon the first
2008 * setup request.*/
2009 scratch |= DEFECT7374_FSM_WAITING_FOR_CONTROL_READ;
2010 set_idx_reg(dev->regs, SCRATCH, scratch);
2011
2012 }
2013
2014 /* keeping it simple:
2015 * - one bus driver, initted first;
2016 * - one function driver, initted second
2017 *
2018 * most of the work to support multiple net2280 controllers would
2019 * be to associate this gadget driver (yes?) with all of them, or
2020 * perhaps to bind specific drivers to specific devices.
2021 */
2022
2023 static void usb_reset_228x(struct net2280 *dev)
2024 {
2025 u32 tmp;
2026
2027 dev->gadget.speed = USB_SPEED_UNKNOWN;
2028 (void) readl(&dev->usb->usbctl);
2029
2030 net2280_led_init(dev);
2031
2032 /* disable automatic responses, and irqs */
2033 writel(0, &dev->usb->stdrsp);
2034 writel(0, &dev->regs->pciirqenb0);
2035 writel(0, &dev->regs->pciirqenb1);
2036
2037 /* clear old dma and irq state */
2038 for (tmp = 0; tmp < 4; tmp++) {
2039 struct net2280_ep *ep = &dev->ep[tmp + 1];
2040 if (ep->dma)
2041 abort_dma(ep);
2042 }
2043
2044 writel(~0, &dev->regs->irqstat0),
2045 writel(~(u32)BIT(SUSPEND_REQUEST_INTERRUPT), &dev->regs->irqstat1),
2046
2047 /* reset, and enable pci */
2048 tmp = readl(&dev->regs->devinit) |
2049 BIT(PCI_ENABLE) |
2050 BIT(FIFO_SOFT_RESET) |
2051 BIT(USB_SOFT_RESET) |
2052 BIT(M8051_RESET);
2053 writel(tmp, &dev->regs->devinit);
2054
2055 /* standard fifo and endpoint allocations */
2056 set_fifo_mode(dev, (fifo_mode <= 2) ? fifo_mode : 0);
2057 }
2058
2059 static void usb_reset_338x(struct net2280 *dev)
2060 {
2061 u32 tmp;
2062
2063 dev->gadget.speed = USB_SPEED_UNKNOWN;
2064 (void)readl(&dev->usb->usbctl);
2065
2066 net2280_led_init(dev);
2067
2068 if (dev->bug7734_patched) {
2069 /* disable automatic responses, and irqs */
2070 writel(0, &dev->usb->stdrsp);
2071 writel(0, &dev->regs->pciirqenb0);
2072 writel(0, &dev->regs->pciirqenb1);
2073 }
2074
2075 /* clear old dma and irq state */
2076 for (tmp = 0; tmp < 4; tmp++) {
2077 struct net2280_ep *ep = &dev->ep[tmp + 1];
2078 struct net2280_dma_regs __iomem *dma;
2079
2080 if (ep->dma) {
2081 abort_dma(ep);
2082 } else {
2083 dma = &dev->dma[tmp];
2084 writel(BIT(DMA_ABORT), &dma->dmastat);
2085 writel(0, &dma->dmactl);
2086 }
2087 }
2088
2089 writel(~0, &dev->regs->irqstat0), writel(~0, &dev->regs->irqstat1);
2090
2091 if (dev->bug7734_patched) {
2092 /* reset, and enable pci */
2093 tmp = readl(&dev->regs->devinit) |
2094 BIT(PCI_ENABLE) |
2095 BIT(FIFO_SOFT_RESET) |
2096 BIT(USB_SOFT_RESET) |
2097 BIT(M8051_RESET);
2098
2099 writel(tmp, &dev->regs->devinit);
2100 }
2101
2102 /* always ep-{1,2,3,4} ... maybe not ep-3 or ep-4 */
2103 INIT_LIST_HEAD(&dev->gadget.ep_list);
2104
2105 for (tmp = 1; tmp < dev->n_ep; tmp++)
2106 list_add_tail(&dev->ep[tmp].ep.ep_list, &dev->gadget.ep_list);
2107
2108 }
2109
2110 static void usb_reset(struct net2280 *dev)
2111 {
2112 if (dev->quirks & PLX_LEGACY)
2113 return usb_reset_228x(dev);
2114 return usb_reset_338x(dev);
2115 }
2116
2117 static void usb_reinit_228x(struct net2280 *dev)
2118 {
2119 u32 tmp;
2120
2121 /* basic endpoint init */
2122 for (tmp = 0; tmp < 7; tmp++) {
2123 struct net2280_ep *ep = &dev->ep[tmp];
2124
2125 ep->ep.name = ep_info_dft[tmp].name;
2126 ep->ep.caps = ep_info_dft[tmp].caps;
2127 ep->dev = dev;
2128 ep->num = tmp;
2129
2130 if (tmp > 0 && tmp <= 4) {
2131 ep->fifo_size = 1024;
2132 ep->dma = &dev->dma[tmp - 1];
2133 } else
2134 ep->fifo_size = 64;
2135 ep->regs = &dev->epregs[tmp];
2136 ep->cfg = &dev->epregs[tmp];
2137 ep_reset_228x(dev->regs, ep);
2138 }
2139 usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 64);
2140 usb_ep_set_maxpacket_limit(&dev->ep[5].ep, 64);
2141 usb_ep_set_maxpacket_limit(&dev->ep[6].ep, 64);
2142
2143 dev->gadget.ep0 = &dev->ep[0].ep;
2144 dev->ep[0].stopped = 0;
2145 INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
2146
2147 /* we want to prevent lowlevel/insecure access from the USB host,
2148 * but erratum 0119 means this enable bit is ignored
2149 */
2150 for (tmp = 0; tmp < 5; tmp++)
2151 writel(EP_DONTUSE, &dev->dep[tmp].dep_cfg);
2152 }
2153
2154 static void usb_reinit_338x(struct net2280 *dev)
2155 {
2156 int i;
2157 u32 tmp, val;
2158 static const u32 ne[9] = { 0, 1, 2, 3, 4, 1, 2, 3, 4 };
2159 static const u32 ep_reg_addr[9] = { 0x00, 0xC0, 0x00, 0xC0, 0x00,
2160 0x00, 0xC0, 0x00, 0xC0 };
2161
2162 /* basic endpoint init */
2163 for (i = 0; i < dev->n_ep; i++) {
2164 struct net2280_ep *ep = &dev->ep[i];
2165
2166 ep->ep.name = dev->enhanced_mode ? ep_info_adv[i].name :
2167 ep_info_dft[i].name;
2168 ep->ep.caps = dev->enhanced_mode ? ep_info_adv[i].caps :
2169 ep_info_dft[i].caps;
2170 ep->dev = dev;
2171 ep->num = i;
2172
2173 if (i > 0 && i <= 4)
2174 ep->dma = &dev->dma[i - 1];
2175
2176 if (dev->enhanced_mode) {
2177 ep->cfg = &dev->epregs[ne[i]];
2178 /*
2179 * Set USB endpoint number, hardware allows same number
2180 * in both directions.
2181 */
2182 if (i > 0 && i < 5)
2183 writel(ne[i], &ep->cfg->ep_cfg);
2184 ep->regs = (struct net2280_ep_regs __iomem *)
2185 (((void __iomem *)&dev->epregs[ne[i]]) +
2186 ep_reg_addr[i]);
2187 } else {
2188 ep->cfg = &dev->epregs[i];
2189 ep->regs = &dev->epregs[i];
2190 }
2191
2192 ep->fifo_size = (i != 0) ? 2048 : 512;
2193
2194 ep_reset_338x(dev->regs, ep);
2195 }
2196 usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 512);
2197
2198 dev->gadget.ep0 = &dev->ep[0].ep;
2199 dev->ep[0].stopped = 0;
2200
2201 /* Link layer set up */
2202 if (dev->bug7734_patched) {
2203 tmp = readl(&dev->usb_ext->usbctl2) &
2204 ~(BIT(U1_ENABLE) | BIT(U2_ENABLE) | BIT(LTM_ENABLE));
2205 writel(tmp, &dev->usb_ext->usbctl2);
2206 }
2207
2208 /* Hardware Defect and Workaround */
2209 val = readl(&dev->ll_lfps_regs->ll_lfps_5);
2210 val &= ~(0xf << TIMER_LFPS_6US);
2211 val |= 0x5 << TIMER_LFPS_6US;
2212 writel(val, &dev->ll_lfps_regs->ll_lfps_5);
2213
2214 val = readl(&dev->ll_lfps_regs->ll_lfps_6);
2215 val &= ~(0xffff << TIMER_LFPS_80US);
2216 val |= 0x0100 << TIMER_LFPS_80US;
2217 writel(val, &dev->ll_lfps_regs->ll_lfps_6);
2218
2219 /*
2220 * AA_AB Errata. Issue 4. Workaround for SuperSpeed USB
2221 * Hot Reset Exit Handshake may Fail in Specific Case using
2222 * Default Register Settings. Workaround for Enumeration test.
2223 */
2224 val = readl(&dev->ll_tsn_regs->ll_tsn_counters_2);
2225 val &= ~(0x1f << HOT_TX_NORESET_TS2);
2226 val |= 0x10 << HOT_TX_NORESET_TS2;
2227 writel(val, &dev->ll_tsn_regs->ll_tsn_counters_2);
2228
2229 val = readl(&dev->ll_tsn_regs->ll_tsn_counters_3);
2230 val &= ~(0x1f << HOT_RX_RESET_TS2);
2231 val |= 0x3 << HOT_RX_RESET_TS2;
2232 writel(val, &dev->ll_tsn_regs->ll_tsn_counters_3);
2233
2234 /*
2235 * Set Recovery Idle to Recover bit:
2236 * - On SS connections, setting Recovery Idle to Recover Fmw improves
2237 * link robustness with various hosts and hubs.
2238 * - It is safe to set for all connection speeds; all chip revisions.
2239 * - R-M-W to leave other bits undisturbed.
2240 * - Reference PLX TT-7372
2241 */
2242 val = readl(&dev->ll_chicken_reg->ll_tsn_chicken_bit);
2243 val |= BIT(RECOVERY_IDLE_TO_RECOVER_FMW);
2244 writel(val, &dev->ll_chicken_reg->ll_tsn_chicken_bit);
2245
2246 INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
2247
2248 /* disable dedicated endpoints */
2249 writel(0x0D, &dev->dep[0].dep_cfg);
2250 writel(0x0D, &dev->dep[1].dep_cfg);
2251 writel(0x0E, &dev->dep[2].dep_cfg);
2252 writel(0x0E, &dev->dep[3].dep_cfg);
2253 writel(0x0F, &dev->dep[4].dep_cfg);
2254 writel(0x0C, &dev->dep[5].dep_cfg);
2255 }
2256
2257 static void usb_reinit(struct net2280 *dev)
2258 {
2259 if (dev->quirks & PLX_LEGACY)
2260 return usb_reinit_228x(dev);
2261 return usb_reinit_338x(dev);
2262 }
2263
2264 static void ep0_start_228x(struct net2280 *dev)
2265 {
2266 writel(BIT(CLEAR_EP_HIDE_STATUS_PHASE) |
2267 BIT(CLEAR_NAK_OUT_PACKETS) |
2268 BIT(CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE),
2269 &dev->epregs[0].ep_rsp);
2270
2271 /*
2272 * hardware optionally handles a bunch of standard requests
2273 * that the API hides from drivers anyway. have it do so.
2274 * endpoint status/features are handled in software, to
2275 * help pass tests for some dubious behavior.
2276 */
2277 writel(BIT(SET_TEST_MODE) |
2278 BIT(SET_ADDRESS) |
2279 BIT(DEVICE_SET_CLEAR_DEVICE_REMOTE_WAKEUP) |
2280 BIT(GET_DEVICE_STATUS) |
2281 BIT(GET_INTERFACE_STATUS),
2282 &dev->usb->stdrsp);
2283 writel(BIT(USB_ROOT_PORT_WAKEUP_ENABLE) |
2284 BIT(SELF_POWERED_USB_DEVICE) |
2285 BIT(REMOTE_WAKEUP_SUPPORT) |
2286 (dev->softconnect << USB_DETECT_ENABLE) |
2287 BIT(SELF_POWERED_STATUS),
2288 &dev->usb->usbctl);
2289
2290 /* enable irqs so we can see ep0 and general operation */
2291 writel(BIT(SETUP_PACKET_INTERRUPT_ENABLE) |
2292 BIT(ENDPOINT_0_INTERRUPT_ENABLE),
2293 &dev->regs->pciirqenb0);
2294 writel(BIT(PCI_INTERRUPT_ENABLE) |
2295 BIT(PCI_MASTER_ABORT_RECEIVED_INTERRUPT_ENABLE) |
2296 BIT(PCI_TARGET_ABORT_RECEIVED_INTERRUPT_ENABLE) |
2297 BIT(PCI_RETRY_ABORT_INTERRUPT_ENABLE) |
2298 BIT(VBUS_INTERRUPT_ENABLE) |
2299 BIT(ROOT_PORT_RESET_INTERRUPT_ENABLE) |
2300 BIT(SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE),
2301 &dev->regs->pciirqenb1);
2302
2303 /* don't leave any writes posted */
2304 (void) readl(&dev->usb->usbctl);
2305 }
2306
2307 static void ep0_start_338x(struct net2280 *dev)
2308 {
2309
2310 if (dev->bug7734_patched)
2311 writel(BIT(CLEAR_NAK_OUT_PACKETS_MODE) |
2312 BIT(SET_EP_HIDE_STATUS_PHASE),
2313 &dev->epregs[0].ep_rsp);
2314
2315 /*
2316 * hardware optionally handles a bunch of standard requests
2317 * that the API hides from drivers anyway. have it do so.
2318 * endpoint status/features are handled in software, to
2319 * help pass tests for some dubious behavior.
2320 */
2321 writel(BIT(SET_ISOCHRONOUS_DELAY) |
2322 BIT(SET_SEL) |
2323 BIT(SET_TEST_MODE) |
2324 BIT(SET_ADDRESS) |
2325 BIT(GET_INTERFACE_STATUS) |
2326 BIT(GET_DEVICE_STATUS),
2327 &dev->usb->stdrsp);
2328 dev->wakeup_enable = 1;
2329 writel(BIT(USB_ROOT_PORT_WAKEUP_ENABLE) |
2330 (dev->softconnect << USB_DETECT_ENABLE) |
2331 BIT(DEVICE_REMOTE_WAKEUP_ENABLE),
2332 &dev->usb->usbctl);
2333
2334 /* enable irqs so we can see ep0 and general operation */
2335 writel(BIT(SETUP_PACKET_INTERRUPT_ENABLE) |
2336 BIT(ENDPOINT_0_INTERRUPT_ENABLE),
2337 &dev->regs->pciirqenb0);
2338 writel(BIT(PCI_INTERRUPT_ENABLE) |
2339 BIT(ROOT_PORT_RESET_INTERRUPT_ENABLE) |
2340 BIT(SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE) |
2341 BIT(VBUS_INTERRUPT_ENABLE),
2342 &dev->regs->pciirqenb1);
2343
2344 /* don't leave any writes posted */
2345 (void)readl(&dev->usb->usbctl);
2346 }
2347
2348 static void ep0_start(struct net2280 *dev)
2349 {
2350 if (dev->quirks & PLX_LEGACY)
2351 return ep0_start_228x(dev);
2352 return ep0_start_338x(dev);
2353 }
2354
2355 /* when a driver is successfully registered, it will receive
2356 * control requests including set_configuration(), which enables
2357 * non-control requests. then usb traffic follows until a
2358 * disconnect is reported. then a host may connect again, or
2359 * the driver might get unbound.
2360 */
2361 static int net2280_start(struct usb_gadget *_gadget,
2362 struct usb_gadget_driver *driver)
2363 {
2364 struct net2280 *dev;
2365 int retval;
2366 unsigned i;
2367
2368 /* insist on high speed support from the driver, since
2369 * (dev->usb->xcvrdiag & FORCE_FULL_SPEED_MODE)
2370 * "must not be used in normal operation"
2371 */
2372 if (!driver || driver->max_speed < USB_SPEED_HIGH ||
2373 !driver->setup)
2374 return -EINVAL;
2375
2376 dev = container_of(_gadget, struct net2280, gadget);
2377
2378 for (i = 0; i < dev->n_ep; i++)
2379 dev->ep[i].irqs = 0;
2380
2381 /* hook up the driver ... */
2382 driver->driver.bus = NULL;
2383 dev->driver = driver;
2384
2385 retval = device_create_file(&dev->pdev->dev, &dev_attr_function);
2386 if (retval)
2387 goto err_unbind;
2388 retval = device_create_file(&dev->pdev->dev, &dev_attr_queues);
2389 if (retval)
2390 goto err_func;
2391
2392 /* enable host detection and ep0; and we're ready
2393 * for set_configuration as well as eventual disconnect.
2394 */
2395 net2280_led_active(dev, 1);
2396
2397 if ((dev->quirks & PLX_PCIE) && !dev->bug7734_patched)
2398 defect7374_enable_data_eps_zero(dev);
2399
2400 ep0_start(dev);
2401
2402 /* pci writes may still be posted */
2403 return 0;
2404
2405 err_func:
2406 device_remove_file(&dev->pdev->dev, &dev_attr_function);
2407 err_unbind:
2408 dev->driver = NULL;
2409 return retval;
2410 }
2411
2412 static void stop_activity(struct net2280 *dev, struct usb_gadget_driver *driver)
2413 {
2414 int i;
2415
2416 /* don't disconnect if it's not connected */
2417 if (dev->gadget.speed == USB_SPEED_UNKNOWN)
2418 driver = NULL;
2419
2420 /* stop hardware; prevent new request submissions;
2421 * and kill any outstanding requests.
2422 */
2423 usb_reset(dev);
2424 for (i = 0; i < dev->n_ep; i++)
2425 nuke(&dev->ep[i]);
2426
2427 /* report disconnect; the driver is already quiesced */
2428 if (driver) {
2429 spin_unlock(&dev->lock);
2430 driver->disconnect(&dev->gadget);
2431 spin_lock(&dev->lock);
2432 }
2433
2434 usb_reinit(dev);
2435 }
2436
2437 static int net2280_stop(struct usb_gadget *_gadget)
2438 {
2439 struct net2280 *dev;
2440 unsigned long flags;
2441
2442 dev = container_of(_gadget, struct net2280, gadget);
2443
2444 spin_lock_irqsave(&dev->lock, flags);
2445 stop_activity(dev, NULL);
2446 spin_unlock_irqrestore(&dev->lock, flags);
2447
2448 net2280_led_active(dev, 0);
2449
2450 device_remove_file(&dev->pdev->dev, &dev_attr_function);
2451 device_remove_file(&dev->pdev->dev, &dev_attr_queues);
2452
2453 dev->driver = NULL;
2454
2455 return 0;
2456 }
2457
2458 /*-------------------------------------------------------------------------*/
2459
2460 /* handle ep0, ep-e, ep-f with 64 byte packets: packet per irq.
2461 * also works for dma-capable endpoints, in pio mode or just
2462 * to manually advance the queue after short OUT transfers.
2463 */
2464 static void handle_ep_small(struct net2280_ep *ep)
2465 {
2466 struct net2280_request *req;
2467 u32 t;
2468 /* 0 error, 1 mid-data, 2 done */
2469 int mode = 1;
2470
2471 if (!list_empty(&ep->queue))
2472 req = list_entry(ep->queue.next,
2473 struct net2280_request, queue);
2474 else
2475 req = NULL;
2476
2477 /* ack all, and handle what we care about */
2478 t = readl(&ep->regs->ep_stat);
2479 ep->irqs++;
2480
2481 ep_vdbg(ep->dev, "%s ack ep_stat %08x, req %p\n",
2482 ep->ep.name, t, req ? &req->req : NULL);
2483
2484 if (!ep->is_in || (ep->dev->quirks & PLX_2280))
2485 writel(t & ~BIT(NAK_OUT_PACKETS), &ep->regs->ep_stat);
2486 else
2487 /* Added for 2282 */
2488 writel(t, &ep->regs->ep_stat);
2489
2490 /* for ep0, monitor token irqs to catch data stage length errors
2491 * and to synchronize on status.
2492 *
2493 * also, to defer reporting of protocol stalls ... here's where
2494 * data or status first appears, handling stalls here should never
2495 * cause trouble on the host side..
2496 *
2497 * control requests could be slightly faster without token synch for
2498 * status, but status can jam up that way.
2499 */
2500 if (unlikely(ep->num == 0)) {
2501 if (ep->is_in) {
2502 /* status; stop NAKing */
2503 if (t & BIT(DATA_OUT_PING_TOKEN_INTERRUPT)) {
2504 if (ep->dev->protocol_stall) {
2505 ep->stopped = 1;
2506 set_halt(ep);
2507 }
2508 if (!req)
2509 allow_status(ep);
2510 mode = 2;
2511 /* reply to extra IN data tokens with a zlp */
2512 } else if (t & BIT(DATA_IN_TOKEN_INTERRUPT)) {
2513 if (ep->dev->protocol_stall) {
2514 ep->stopped = 1;
2515 set_halt(ep);
2516 mode = 2;
2517 } else if (ep->responded &&
2518 !req && !ep->stopped)
2519 write_fifo(ep, NULL);
2520 }
2521 } else {
2522 /* status; stop NAKing */
2523 if (t & BIT(DATA_IN_TOKEN_INTERRUPT)) {
2524 if (ep->dev->protocol_stall) {
2525 ep->stopped = 1;
2526 set_halt(ep);
2527 }
2528 mode = 2;
2529 /* an extra OUT token is an error */
2530 } else if (((t & BIT(DATA_OUT_PING_TOKEN_INTERRUPT)) &&
2531 req &&
2532 req->req.actual == req->req.length) ||
2533 (ep->responded && !req)) {
2534 ep->dev->protocol_stall = 1;
2535 set_halt(ep);
2536 ep->stopped = 1;
2537 if (req)
2538 done(ep, req, -EOVERFLOW);
2539 req = NULL;
2540 }
2541 }
2542 }
2543
2544 if (unlikely(!req))
2545 return;
2546
2547 /* manual DMA queue advance after short OUT */
2548 if (likely(ep->dma)) {
2549 if (t & BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT)) {
2550 u32 count;
2551 int stopped = ep->stopped;
2552
2553 /* TRANSFERRED works around OUT_DONE erratum 0112.
2554 * we expect (N <= maxpacket) bytes; host wrote M.
2555 * iff (M < N) we won't ever see a DMA interrupt.
2556 */
2557 ep->stopped = 1;
2558 for (count = 0; ; t = readl(&ep->regs->ep_stat)) {
2559
2560 /* any preceding dma transfers must finish.
2561 * dma handles (M >= N), may empty the queue
2562 */
2563 scan_dma_completions(ep);
2564 if (unlikely(list_empty(&ep->queue) ||
2565 ep->out_overflow)) {
2566 req = NULL;
2567 break;
2568 }
2569 req = list_entry(ep->queue.next,
2570 struct net2280_request, queue);
2571
2572 /* here either (M < N), a "real" short rx;
2573 * or (M == N) and the queue didn't empty
2574 */
2575 if (likely(t & BIT(FIFO_EMPTY))) {
2576 count = readl(&ep->dma->dmacount);
2577 count &= DMA_BYTE_COUNT_MASK;
2578 if (readl(&ep->dma->dmadesc)
2579 != req->td_dma)
2580 req = NULL;
2581 break;
2582 }
2583 udelay(1);
2584 }
2585
2586 /* stop DMA, leave ep NAKing */
2587 writel(BIT(DMA_ABORT), &ep->dma->dmastat);
2588 spin_stop_dma(ep->dma);
2589
2590 if (likely(req)) {
2591 req->td->dmacount = 0;
2592 t = readl(&ep->regs->ep_avail);
2593 dma_done(ep, req, count,
2594 (ep->out_overflow || t)
2595 ? -EOVERFLOW : 0);
2596 }
2597
2598 /* also flush to prevent erratum 0106 trouble */
2599 if (unlikely(ep->out_overflow ||
2600 (ep->dev->chiprev == 0x0100 &&
2601 ep->dev->gadget.speed
2602 == USB_SPEED_FULL))) {
2603 out_flush(ep);
2604 ep->out_overflow = 0;
2605 }
2606
2607 /* (re)start dma if needed, stop NAKing */
2608 ep->stopped = stopped;
2609 if (!list_empty(&ep->queue))
2610 restart_dma(ep);
2611 } else
2612 ep_dbg(ep->dev, "%s dma ep_stat %08x ??\n",
2613 ep->ep.name, t);
2614 return;
2615
2616 /* data packet(s) received (in the fifo, OUT) */
2617 } else if (t & BIT(DATA_PACKET_RECEIVED_INTERRUPT)) {
2618 if (read_fifo(ep, req) && ep->num != 0)
2619 mode = 2;
2620
2621 /* data packet(s) transmitted (IN) */
2622 } else if (t & BIT(DATA_PACKET_TRANSMITTED_INTERRUPT)) {
2623 unsigned len;
2624
2625 len = req->req.length - req->req.actual;
2626 if (len > ep->ep.maxpacket)
2627 len = ep->ep.maxpacket;
2628 req->req.actual += len;
2629
2630 /* if we wrote it all, we're usually done */
2631 /* send zlps until the status stage */
2632 if ((req->req.actual == req->req.length) &&
2633 (!req->req.zero || len != ep->ep.maxpacket) && ep->num)
2634 mode = 2;
2635
2636 /* there was nothing to do ... */
2637 } else if (mode == 1)
2638 return;
2639
2640 /* done */
2641 if (mode == 2) {
2642 /* stream endpoints often resubmit/unlink in completion */
2643 done(ep, req, 0);
2644
2645 /* maybe advance queue to next request */
2646 if (ep->num == 0) {
2647 /* NOTE: net2280 could let gadget driver start the
2648 * status stage later. since not all controllers let
2649 * them control that, the api doesn't (yet) allow it.
2650 */
2651 if (!ep->stopped)
2652 allow_status(ep);
2653 req = NULL;
2654 } else {
2655 if (!list_empty(&ep->queue) && !ep->stopped)
2656 req = list_entry(ep->queue.next,
2657 struct net2280_request, queue);
2658 else
2659 req = NULL;
2660 if (req && !ep->is_in)
2661 stop_out_naking(ep);
2662 }
2663 }
2664
2665 /* is there a buffer for the next packet?
2666 * for best streaming performance, make sure there is one.
2667 */
2668 if (req && !ep->stopped) {
2669
2670 /* load IN fifo with next packet (may be zlp) */
2671 if (t & BIT(DATA_PACKET_TRANSMITTED_INTERRUPT))
2672 write_fifo(ep, &req->req);
2673 }
2674 }
2675
2676 static struct net2280_ep *get_ep_by_addr(struct net2280 *dev, u16 wIndex)
2677 {
2678 struct net2280_ep *ep;
2679
2680 if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0)
2681 return &dev->ep[0];
2682 list_for_each_entry(ep, &dev->gadget.ep_list, ep.ep_list) {
2683 u8 bEndpointAddress;
2684
2685 if (!ep->desc)
2686 continue;
2687 bEndpointAddress = ep->desc->bEndpointAddress;
2688 if ((wIndex ^ bEndpointAddress) & USB_DIR_IN)
2689 continue;
2690 if ((wIndex & 0x0f) == (bEndpointAddress & 0x0f))
2691 return ep;
2692 }
2693 return NULL;
2694 }
2695
2696 static void defect7374_workaround(struct net2280 *dev, struct usb_ctrlrequest r)
2697 {
2698 u32 scratch, fsmvalue;
2699 u32 ack_wait_timeout, state;
2700
2701 /* Workaround for Defect 7374 (U1/U2 erroneously rejected): */
2702 scratch = get_idx_reg(dev->regs, SCRATCH);
2703 fsmvalue = scratch & (0xf << DEFECT7374_FSM_FIELD);
2704 scratch &= ~(0xf << DEFECT7374_FSM_FIELD);
2705
2706 if (!((fsmvalue == DEFECT7374_FSM_WAITING_FOR_CONTROL_READ) &&
2707 (r.bRequestType & USB_DIR_IN)))
2708 return;
2709
2710 /* This is the first Control Read for this connection: */
2711 if (!(readl(&dev->usb->usbstat) & BIT(SUPER_SPEED_MODE))) {
2712 /*
2713 * Connection is NOT SS:
2714 * - Connection must be FS or HS.
2715 * - This FSM state should allow workaround software to
2716 * run after the next USB connection.
2717 */
2718 scratch |= DEFECT7374_FSM_NON_SS_CONTROL_READ;
2719 dev->bug7734_patched = 1;
2720 goto restore_data_eps;
2721 }
2722
2723 /* Connection is SS: */
2724 for (ack_wait_timeout = 0;
2725 ack_wait_timeout < DEFECT_7374_NUMBEROF_MAX_WAIT_LOOPS;
2726 ack_wait_timeout++) {
2727
2728 state = readl(&dev->plregs->pl_ep_status_1)
2729 & (0xff << STATE);
2730 if ((state >= (ACK_GOOD_NORMAL << STATE)) &&
2731 (state <= (ACK_GOOD_MORE_ACKS_TO_COME << STATE))) {
2732 scratch |= DEFECT7374_FSM_SS_CONTROL_READ;
2733 dev->bug7734_patched = 1;
2734 break;
2735 }
2736
2737 /*
2738 * We have not yet received host's Data Phase ACK
2739 * - Wait and try again.
2740 */
2741 udelay(DEFECT_7374_PROCESSOR_WAIT_TIME);
2742
2743 continue;
2744 }
2745
2746
2747 if (ack_wait_timeout >= DEFECT_7374_NUMBEROF_MAX_WAIT_LOOPS) {
2748 ep_err(dev, "FAIL: Defect 7374 workaround waited but failed "
2749 "to detect SS host's data phase ACK.");
2750 ep_err(dev, "PL_EP_STATUS_1(23:16):.Expected from 0x11 to 0x16"
2751 "got 0x%2.2x.\n", state >> STATE);
2752 } else {
2753 ep_warn(dev, "INFO: Defect 7374 workaround waited about\n"
2754 "%duSec for Control Read Data Phase ACK\n",
2755 DEFECT_7374_PROCESSOR_WAIT_TIME * ack_wait_timeout);
2756 }
2757
2758 restore_data_eps:
2759 /*
2760 * Restore data EPs to their pre-workaround settings (disabled,
2761 * initialized, and other details).
2762 */
2763 defect7374_disable_data_eps(dev);
2764
2765 set_idx_reg(dev->regs, SCRATCH, scratch);
2766
2767 return;
2768 }
2769
2770 static void ep_clear_seqnum(struct net2280_ep *ep)
2771 {
2772 struct net2280 *dev = ep->dev;
2773 u32 val;
2774 static const u32 ep_pl[9] = { 0, 3, 4, 7, 8, 2, 5, 6, 9 };
2775
2776 val = readl(&dev->plregs->pl_ep_ctrl) & ~0x1f;
2777 val |= ep_pl[ep->num];
2778 writel(val, &dev->plregs->pl_ep_ctrl);
2779 val |= BIT(SEQUENCE_NUMBER_RESET);
2780 writel(val, &dev->plregs->pl_ep_ctrl);
2781
2782 return;
2783 }
2784
2785 static void handle_stat0_irqs_superspeed(struct net2280 *dev,
2786 struct net2280_ep *ep, struct usb_ctrlrequest r)
2787 {
2788 int tmp = 0;
2789
2790 #define w_value le16_to_cpu(r.wValue)
2791 #define w_index le16_to_cpu(r.wIndex)
2792 #define w_length le16_to_cpu(r.wLength)
2793
2794 switch (r.bRequest) {
2795 struct net2280_ep *e;
2796 u16 status;
2797
2798 case USB_REQ_SET_CONFIGURATION:
2799 dev->addressed_state = !w_value;
2800 goto usb3_delegate;
2801
2802 case USB_REQ_GET_STATUS:
2803 switch (r.bRequestType) {
2804 case (USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_DEVICE):
2805 status = dev->wakeup_enable ? 0x02 : 0x00;
2806 if (dev->gadget.is_selfpowered)
2807 status |= BIT(0);
2808 status |= (dev->u1_enable << 2 | dev->u2_enable << 3 |
2809 dev->ltm_enable << 4);
2810 writel(0, &dev->epregs[0].ep_irqenb);
2811 set_fifo_bytecount(ep, sizeof(status));
2812 writel((__force u32) status, &dev->epregs[0].ep_data);
2813 allow_status_338x(ep);
2814 break;
2815
2816 case (USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_ENDPOINT):
2817 e = get_ep_by_addr(dev, w_index);
2818 if (!e)
2819 goto do_stall3;
2820 status = readl(&e->regs->ep_rsp) &
2821 BIT(CLEAR_ENDPOINT_HALT);
2822 writel(0, &dev->epregs[0].ep_irqenb);
2823 set_fifo_bytecount(ep, sizeof(status));
2824 writel((__force u32) status, &dev->epregs[0].ep_data);
2825 allow_status_338x(ep);
2826 break;
2827
2828 default:
2829 goto usb3_delegate;
2830 }
2831 break;
2832
2833 case USB_REQ_CLEAR_FEATURE:
2834 switch (r.bRequestType) {
2835 case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE):
2836 if (!dev->addressed_state) {
2837 switch (w_value) {
2838 case USB_DEVICE_U1_ENABLE:
2839 dev->u1_enable = 0;
2840 writel(readl(&dev->usb_ext->usbctl2) &
2841 ~BIT(U1_ENABLE),
2842 &dev->usb_ext->usbctl2);
2843 allow_status_338x(ep);
2844 goto next_endpoints3;
2845
2846 case USB_DEVICE_U2_ENABLE:
2847 dev->u2_enable = 0;
2848 writel(readl(&dev->usb_ext->usbctl2) &
2849 ~BIT(U2_ENABLE),
2850 &dev->usb_ext->usbctl2);
2851 allow_status_338x(ep);
2852 goto next_endpoints3;
2853
2854 case USB_DEVICE_LTM_ENABLE:
2855 dev->ltm_enable = 0;
2856 writel(readl(&dev->usb_ext->usbctl2) &
2857 ~BIT(LTM_ENABLE),
2858 &dev->usb_ext->usbctl2);
2859 allow_status_338x(ep);
2860 goto next_endpoints3;
2861
2862 default:
2863 break;
2864 }
2865 }
2866 if (w_value == USB_DEVICE_REMOTE_WAKEUP) {
2867 dev->wakeup_enable = 0;
2868 writel(readl(&dev->usb->usbctl) &
2869 ~BIT(DEVICE_REMOTE_WAKEUP_ENABLE),
2870 &dev->usb->usbctl);
2871 allow_status_338x(ep);
2872 break;
2873 }
2874 goto usb3_delegate;
2875
2876 case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_ENDPOINT):
2877 e = get_ep_by_addr(dev, w_index);
2878 if (!e)
2879 goto do_stall3;
2880 if (w_value != USB_ENDPOINT_HALT)
2881 goto do_stall3;
2882 ep_vdbg(dev, "%s clear halt\n", e->ep.name);
2883 /*
2884 * Workaround for SS SeqNum not cleared via
2885 * Endpoint Halt (Clear) bit. select endpoint
2886 */
2887 ep_clear_seqnum(e);
2888 clear_halt(e);
2889 if (!list_empty(&e->queue) && e->td_dma)
2890 restart_dma(e);
2891 allow_status(ep);
2892 ep->stopped = 1;
2893 break;
2894
2895 default:
2896 goto usb3_delegate;
2897 }
2898 break;
2899 case USB_REQ_SET_FEATURE:
2900 switch (r.bRequestType) {
2901 case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE):
2902 if (!dev->addressed_state) {
2903 switch (w_value) {
2904 case USB_DEVICE_U1_ENABLE:
2905 dev->u1_enable = 1;
2906 writel(readl(&dev->usb_ext->usbctl2) |
2907 BIT(U1_ENABLE),
2908 &dev->usb_ext->usbctl2);
2909 allow_status_338x(ep);
2910 goto next_endpoints3;
2911
2912 case USB_DEVICE_U2_ENABLE:
2913 dev->u2_enable = 1;
2914 writel(readl(&dev->usb_ext->usbctl2) |
2915 BIT(U2_ENABLE),
2916 &dev->usb_ext->usbctl2);
2917 allow_status_338x(ep);
2918 goto next_endpoints3;
2919
2920 case USB_DEVICE_LTM_ENABLE:
2921 dev->ltm_enable = 1;
2922 writel(readl(&dev->usb_ext->usbctl2) |
2923 BIT(LTM_ENABLE),
2924 &dev->usb_ext->usbctl2);
2925 allow_status_338x(ep);
2926 goto next_endpoints3;
2927 default:
2928 break;
2929 }
2930 }
2931
2932 if (w_value == USB_DEVICE_REMOTE_WAKEUP) {
2933 dev->wakeup_enable = 1;
2934 writel(readl(&dev->usb->usbctl) |
2935 BIT(DEVICE_REMOTE_WAKEUP_ENABLE),
2936 &dev->usb->usbctl);
2937 allow_status_338x(ep);
2938 break;
2939 }
2940 goto usb3_delegate;
2941
2942 case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_ENDPOINT):
2943 e = get_ep_by_addr(dev, w_index);
2944 if (!e || (w_value != USB_ENDPOINT_HALT))
2945 goto do_stall3;
2946 ep->stopped = 1;
2947 if (ep->num == 0)
2948 ep->dev->protocol_stall = 1;
2949 else {
2950 if (ep->dma)
2951 abort_dma(ep);
2952 set_halt(ep);
2953 }
2954 allow_status_338x(ep);
2955 break;
2956
2957 default:
2958 goto usb3_delegate;
2959 }
2960
2961 break;
2962 default:
2963
2964 usb3_delegate:
2965 ep_vdbg(dev, "setup %02x.%02x v%04x i%04x l%04x ep_cfg %08x\n",
2966 r.bRequestType, r.bRequest,
2967 w_value, w_index, w_length,
2968 readl(&ep->cfg->ep_cfg));
2969
2970 ep->responded = 0;
2971 spin_unlock(&dev->lock);
2972 tmp = dev->driver->setup(&dev->gadget, &r);
2973 spin_lock(&dev->lock);
2974 }
2975 do_stall3:
2976 if (tmp < 0) {
2977 ep_vdbg(dev, "req %02x.%02x protocol STALL; stat %d\n",
2978 r.bRequestType, r.bRequest, tmp);
2979 dev->protocol_stall = 1;
2980 /* TD 9.9 Halt Endpoint test. TD 9.22 Set feature test */
2981 set_halt(ep);
2982 }
2983
2984 next_endpoints3:
2985
2986 #undef w_value
2987 #undef w_index
2988 #undef w_length
2989
2990 return;
2991 }
2992
2993 static void usb338x_handle_ep_intr(struct net2280 *dev, u32 stat0)
2994 {
2995 u32 index;
2996 u32 bit;
2997
2998 for (index = 0; index < ARRAY_SIZE(ep_bit); index++) {
2999 bit = BIT(ep_bit[index]);
3000
3001 if (!stat0)
3002 break;
3003
3004 if (!(stat0 & bit))
3005 continue;
3006
3007 stat0 &= ~bit;
3008
3009 handle_ep_small(&dev->ep[index]);
3010 }
3011 }
3012
3013 static void handle_stat0_irqs(struct net2280 *dev, u32 stat)
3014 {
3015 struct net2280_ep *ep;
3016 u32 num, scratch;
3017
3018 /* most of these don't need individual acks */
3019 stat &= ~BIT(INTA_ASSERTED);
3020 if (!stat)
3021 return;
3022 /* ep_dbg(dev, "irqstat0 %04x\n", stat); */
3023
3024 /* starting a control request? */
3025 if (unlikely(stat & BIT(SETUP_PACKET_INTERRUPT))) {
3026 union {
3027 u32 raw[2];
3028 struct usb_ctrlrequest r;
3029 } u;
3030 int tmp;
3031 struct net2280_request *req;
3032
3033 if (dev->gadget.speed == USB_SPEED_UNKNOWN) {
3034 u32 val = readl(&dev->usb->usbstat);
3035 if (val & BIT(SUPER_SPEED)) {
3036 dev->gadget.speed = USB_SPEED_SUPER;
3037 usb_ep_set_maxpacket_limit(&dev->ep[0].ep,
3038 EP0_SS_MAX_PACKET_SIZE);
3039 } else if (val & BIT(HIGH_SPEED)) {
3040 dev->gadget.speed = USB_SPEED_HIGH;
3041 usb_ep_set_maxpacket_limit(&dev->ep[0].ep,
3042 EP0_HS_MAX_PACKET_SIZE);
3043 } else {
3044 dev->gadget.speed = USB_SPEED_FULL;
3045 usb_ep_set_maxpacket_limit(&dev->ep[0].ep,
3046 EP0_HS_MAX_PACKET_SIZE);
3047 }
3048 net2280_led_speed(dev, dev->gadget.speed);
3049 ep_dbg(dev, "%s\n",
3050 usb_speed_string(dev->gadget.speed));
3051 }
3052
3053 ep = &dev->ep[0];
3054 ep->irqs++;
3055
3056 /* make sure any leftover request state is cleared */
3057 stat &= ~BIT(ENDPOINT_0_INTERRUPT);
3058 while (!list_empty(&ep->queue)) {
3059 req = list_entry(ep->queue.next,
3060 struct net2280_request, queue);
3061 done(ep, req, (req->req.actual == req->req.length)
3062 ? 0 : -EPROTO);
3063 }
3064 ep->stopped = 0;
3065 dev->protocol_stall = 0;
3066 if (!(dev->quirks & PLX_PCIE)) {
3067 if (ep->dev->quirks & PLX_2280)
3068 tmp = BIT(FIFO_OVERFLOW) |
3069 BIT(FIFO_UNDERFLOW);
3070 else
3071 tmp = 0;
3072
3073 writel(tmp | BIT(TIMEOUT) |
3074 BIT(USB_STALL_SENT) |
3075 BIT(USB_IN_NAK_SENT) |
3076 BIT(USB_IN_ACK_RCVD) |
3077 BIT(USB_OUT_PING_NAK_SENT) |
3078 BIT(USB_OUT_ACK_SENT) |
3079 BIT(SHORT_PACKET_OUT_DONE_INTERRUPT) |
3080 BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT) |
3081 BIT(DATA_PACKET_RECEIVED_INTERRUPT) |
3082 BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) |
3083 BIT(DATA_OUT_PING_TOKEN_INTERRUPT) |
3084 BIT(DATA_IN_TOKEN_INTERRUPT),
3085 &ep->regs->ep_stat);
3086 }
3087 u.raw[0] = readl(&dev->usb->setup0123);
3088 u.raw[1] = readl(&dev->usb->setup4567);
3089
3090 cpu_to_le32s(&u.raw[0]);
3091 cpu_to_le32s(&u.raw[1]);
3092
3093 if ((dev->quirks & PLX_PCIE) && !dev->bug7734_patched)
3094 defect7374_workaround(dev, u.r);
3095
3096 tmp = 0;
3097
3098 #define w_value le16_to_cpu(u.r.wValue)
3099 #define w_index le16_to_cpu(u.r.wIndex)
3100 #define w_length le16_to_cpu(u.r.wLength)
3101
3102 /* ack the irq */
3103 writel(BIT(SETUP_PACKET_INTERRUPT), &dev->regs->irqstat0);
3104 stat ^= BIT(SETUP_PACKET_INTERRUPT);
3105
3106 /* watch control traffic at the token level, and force
3107 * synchronization before letting the status stage happen.
3108 * FIXME ignore tokens we'll NAK, until driver responds.
3109 * that'll mean a lot less irqs for some drivers.
3110 */
3111 ep->is_in = (u.r.bRequestType & USB_DIR_IN) != 0;
3112 if (ep->is_in) {
3113 scratch = BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) |
3114 BIT(DATA_OUT_PING_TOKEN_INTERRUPT) |
3115 BIT(DATA_IN_TOKEN_INTERRUPT);
3116 stop_out_naking(ep);
3117 } else
3118 scratch = BIT(DATA_PACKET_RECEIVED_INTERRUPT) |
3119 BIT(DATA_OUT_PING_TOKEN_INTERRUPT) |
3120 BIT(DATA_IN_TOKEN_INTERRUPT);
3121 writel(scratch, &dev->epregs[0].ep_irqenb);
3122
3123 /* we made the hardware handle most lowlevel requests;
3124 * everything else goes uplevel to the gadget code.
3125 */
3126 ep->responded = 1;
3127
3128 if (dev->gadget.speed == USB_SPEED_SUPER) {
3129 handle_stat0_irqs_superspeed(dev, ep, u.r);
3130 goto next_endpoints;
3131 }
3132
3133 switch (u.r.bRequest) {
3134 case USB_REQ_GET_STATUS: {
3135 struct net2280_ep *e;
3136 __le32 status;
3137
3138 /* hw handles device and interface status */
3139 if (u.r.bRequestType != (USB_DIR_IN|USB_RECIP_ENDPOINT))
3140 goto delegate;
3141 e = get_ep_by_addr(dev, w_index);
3142 if (!e || w_length > 2)
3143 goto do_stall;
3144
3145 if (readl(&e->regs->ep_rsp) & BIT(SET_ENDPOINT_HALT))
3146 status = cpu_to_le32(1);
3147 else
3148 status = cpu_to_le32(0);
3149
3150 /* don't bother with a request object! */
3151 writel(0, &dev->epregs[0].ep_irqenb);
3152 set_fifo_bytecount(ep, w_length);
3153 writel((__force u32)status, &dev->epregs[0].ep_data);
3154 allow_status(ep);
3155 ep_vdbg(dev, "%s stat %02x\n", ep->ep.name, status);
3156 goto next_endpoints;
3157 }
3158 break;
3159 case USB_REQ_CLEAR_FEATURE: {
3160 struct net2280_ep *e;
3161
3162 /* hw handles device features */
3163 if (u.r.bRequestType != USB_RECIP_ENDPOINT)
3164 goto delegate;
3165 if (w_value != USB_ENDPOINT_HALT || w_length != 0)
3166 goto do_stall;
3167 e = get_ep_by_addr(dev, w_index);
3168 if (!e)
3169 goto do_stall;
3170 if (e->wedged) {
3171 ep_vdbg(dev, "%s wedged, halt not cleared\n",
3172 ep->ep.name);
3173 } else {
3174 ep_vdbg(dev, "%s clear halt\n", e->ep.name);
3175 clear_halt(e);
3176 if ((ep->dev->quirks & PLX_PCIE) &&
3177 !list_empty(&e->queue) && e->td_dma)
3178 restart_dma(e);
3179 }
3180 allow_status(ep);
3181 goto next_endpoints;
3182 }
3183 break;
3184 case USB_REQ_SET_FEATURE: {
3185 struct net2280_ep *e;
3186
3187 /* hw handles device features */
3188 if (u.r.bRequestType != USB_RECIP_ENDPOINT)
3189 goto delegate;
3190 if (w_value != USB_ENDPOINT_HALT || w_length != 0)
3191 goto do_stall;
3192 e = get_ep_by_addr(dev, w_index);
3193 if (!e)
3194 goto do_stall;
3195 if (e->ep.name == ep0name)
3196 goto do_stall;
3197 set_halt(e);
3198 if ((dev->quirks & PLX_PCIE) && e->dma)
3199 abort_dma(e);
3200 allow_status(ep);
3201 ep_vdbg(dev, "%s set halt\n", ep->ep.name);
3202 goto next_endpoints;
3203 }
3204 break;
3205 default:
3206 delegate:
3207 ep_vdbg(dev, "setup %02x.%02x v%04x i%04x l%04x "
3208 "ep_cfg %08x\n",
3209 u.r.bRequestType, u.r.bRequest,
3210 w_value, w_index, w_length,
3211 readl(&ep->cfg->ep_cfg));
3212 ep->responded = 0;
3213 spin_unlock(&dev->lock);
3214 tmp = dev->driver->setup(&dev->gadget, &u.r);
3215 spin_lock(&dev->lock);
3216 }
3217
3218 /* stall ep0 on error */
3219 if (tmp < 0) {
3220 do_stall:
3221 ep_vdbg(dev, "req %02x.%02x protocol STALL; stat %d\n",
3222 u.r.bRequestType, u.r.bRequest, tmp);
3223 dev->protocol_stall = 1;
3224 }
3225
3226 /* some in/out token irq should follow; maybe stall then.
3227 * driver must queue a request (even zlp) or halt ep0
3228 * before the host times out.
3229 */
3230 }
3231
3232 #undef w_value
3233 #undef w_index
3234 #undef w_length
3235
3236 next_endpoints:
3237 if ((dev->quirks & PLX_PCIE) && dev->enhanced_mode) {
3238 u32 mask = (BIT(ENDPOINT_0_INTERRUPT) |
3239 USB3380_IRQSTAT0_EP_INTR_MASK_IN |
3240 USB3380_IRQSTAT0_EP_INTR_MASK_OUT);
3241
3242 if (stat & mask) {
3243 usb338x_handle_ep_intr(dev, stat & mask);
3244 stat &= ~mask;
3245 }
3246 } else {
3247 /* endpoint data irq ? */
3248 scratch = stat & 0x7f;
3249 stat &= ~0x7f;
3250 for (num = 0; scratch; num++) {
3251 u32 t;
3252
3253 /* do this endpoint's FIFO and queue need tending? */
3254 t = BIT(num);
3255 if ((scratch & t) == 0)
3256 continue;
3257 scratch ^= t;
3258
3259 ep = &dev->ep[num];
3260 handle_ep_small(ep);
3261 }
3262 }
3263
3264 if (stat)
3265 ep_dbg(dev, "unhandled irqstat0 %08x\n", stat);
3266 }
3267
3268 #define DMA_INTERRUPTS (BIT(DMA_D_INTERRUPT) | \
3269 BIT(DMA_C_INTERRUPT) | \
3270 BIT(DMA_B_INTERRUPT) | \
3271 BIT(DMA_A_INTERRUPT))
3272 #define PCI_ERROR_INTERRUPTS ( \
3273 BIT(PCI_MASTER_ABORT_RECEIVED_INTERRUPT) | \
3274 BIT(PCI_TARGET_ABORT_RECEIVED_INTERRUPT) | \
3275 BIT(PCI_RETRY_ABORT_INTERRUPT))
3276
3277 static void handle_stat1_irqs(struct net2280 *dev, u32 stat)
3278 __releases(dev->lock)
3279 __acquires(dev->lock)
3280 {
3281 struct net2280_ep *ep;
3282 u32 tmp, num, mask, scratch;
3283
3284 /* after disconnect there's nothing else to do! */
3285 tmp = BIT(VBUS_INTERRUPT) | BIT(ROOT_PORT_RESET_INTERRUPT);
3286 mask = BIT(SUPER_SPEED) | BIT(HIGH_SPEED) | BIT(FULL_SPEED);
3287
3288 /* VBUS disconnect is indicated by VBUS_PIN and VBUS_INTERRUPT set.
3289 * Root Port Reset is indicated by ROOT_PORT_RESET_INTERRUPT set and
3290 * both HIGH_SPEED and FULL_SPEED clear (as ROOT_PORT_RESET_INTERRUPT
3291 * only indicates a change in the reset state).
3292 */
3293 if (stat & tmp) {
3294 bool reset = false;
3295 bool disconnect = false;
3296
3297 /*
3298 * Ignore disconnects and resets if the speed hasn't been set.
3299 * VBUS can bounce and there's always an initial reset.
3300 */
3301 writel(tmp, &dev->regs->irqstat1);
3302 if (dev->gadget.speed != USB_SPEED_UNKNOWN) {
3303 if ((stat & BIT(VBUS_INTERRUPT)) &&
3304 (readl(&dev->usb->usbctl) &
3305 BIT(VBUS_PIN)) == 0) {
3306 disconnect = true;
3307 ep_dbg(dev, "disconnect %s\n",
3308 dev->driver->driver.name);
3309 } else if ((stat & BIT(ROOT_PORT_RESET_INTERRUPT)) &&
3310 (readl(&dev->usb->usbstat) & mask)
3311 == 0) {
3312 reset = true;
3313 ep_dbg(dev, "reset %s\n",
3314 dev->driver->driver.name);
3315 }
3316
3317 if (disconnect || reset) {
3318 stop_activity(dev, dev->driver);
3319 ep0_start(dev);
3320 spin_unlock(&dev->lock);
3321 if (reset)
3322 usb_gadget_udc_reset
3323 (&dev->gadget, dev->driver);
3324 else
3325 (dev->driver->disconnect)
3326 (&dev->gadget);
3327 spin_lock(&dev->lock);
3328 return;
3329 }
3330 }
3331 stat &= ~tmp;
3332
3333 /* vBUS can bounce ... one of many reasons to ignore the
3334 * notion of hotplug events on bus connect/disconnect!
3335 */
3336 if (!stat)
3337 return;
3338 }
3339
3340 /* NOTE: chip stays in PCI D0 state for now, but it could
3341 * enter D1 to save more power
3342 */
3343 tmp = BIT(SUSPEND_REQUEST_CHANGE_INTERRUPT);
3344 if (stat & tmp) {
3345 writel(tmp, &dev->regs->irqstat1);
3346 if (stat & BIT(SUSPEND_REQUEST_INTERRUPT)) {
3347 if (dev->driver->suspend)
3348 dev->driver->suspend(&dev->gadget);
3349 if (!enable_suspend)
3350 stat &= ~BIT(SUSPEND_REQUEST_INTERRUPT);
3351 } else {
3352 if (dev->driver->resume)
3353 dev->driver->resume(&dev->gadget);
3354 /* at high speed, note erratum 0133 */
3355 }
3356 stat &= ~tmp;
3357 }
3358
3359 /* clear any other status/irqs */
3360 if (stat)
3361 writel(stat, &dev->regs->irqstat1);
3362
3363 /* some status we can just ignore */
3364 if (dev->quirks & PLX_2280)
3365 stat &= ~(BIT(CONTROL_STATUS_INTERRUPT) |
3366 BIT(SUSPEND_REQUEST_INTERRUPT) |
3367 BIT(RESUME_INTERRUPT) |
3368 BIT(SOF_INTERRUPT));
3369 else
3370 stat &= ~(BIT(CONTROL_STATUS_INTERRUPT) |
3371 BIT(RESUME_INTERRUPT) |
3372 BIT(SOF_DOWN_INTERRUPT) |
3373 BIT(SOF_INTERRUPT));
3374
3375 if (!stat)
3376 return;
3377 /* ep_dbg(dev, "irqstat1 %08x\n", stat);*/
3378
3379 /* DMA status, for ep-{a,b,c,d} */
3380 scratch = stat & DMA_INTERRUPTS;
3381 stat &= ~DMA_INTERRUPTS;
3382 scratch >>= 9;
3383 for (num = 0; scratch; num++) {
3384 struct net2280_dma_regs __iomem *dma;
3385
3386 tmp = BIT(num);
3387 if ((tmp & scratch) == 0)
3388 continue;
3389 scratch ^= tmp;
3390
3391 ep = &dev->ep[num + 1];
3392 dma = ep->dma;
3393
3394 if (!dma)
3395 continue;
3396
3397 /* clear ep's dma status */
3398 tmp = readl(&dma->dmastat);
3399 writel(tmp, &dma->dmastat);
3400
3401 /* dma sync*/
3402 if (dev->quirks & PLX_PCIE) {
3403 u32 r_dmacount = readl(&dma->dmacount);
3404 if (!ep->is_in && (r_dmacount & 0x00FFFFFF) &&
3405 (tmp & BIT(DMA_TRANSACTION_DONE_INTERRUPT)))
3406 continue;
3407 }
3408
3409 if (!(tmp & BIT(DMA_TRANSACTION_DONE_INTERRUPT))) {
3410 ep_dbg(ep->dev, "%s no xact done? %08x\n",
3411 ep->ep.name, tmp);
3412 continue;
3413 }
3414 stop_dma(ep->dma);
3415
3416 /* OUT transfers terminate when the data from the
3417 * host is in our memory. Process whatever's done.
3418 * On this path, we know transfer's last packet wasn't
3419 * less than req->length. NAK_OUT_PACKETS may be set,
3420 * or the FIFO may already be holding new packets.
3421 *
3422 * IN transfers can linger in the FIFO for a very
3423 * long time ... we ignore that for now, accounting
3424 * precisely (like PIO does) needs per-packet irqs
3425 */
3426 scan_dma_completions(ep);
3427
3428 /* disable dma on inactive queues; else maybe restart */
3429 if (!list_empty(&ep->queue)) {
3430 tmp = readl(&dma->dmactl);
3431 restart_dma(ep);
3432 }
3433 ep->irqs++;
3434 }
3435
3436 /* NOTE: there are other PCI errors we might usefully notice.
3437 * if they appear very often, here's where to try recovering.
3438 */
3439 if (stat & PCI_ERROR_INTERRUPTS) {
3440 ep_err(dev, "pci dma error; stat %08x\n", stat);
3441 stat &= ~PCI_ERROR_INTERRUPTS;
3442 /* these are fatal errors, but "maybe" they won't
3443 * happen again ...
3444 */
3445 stop_activity(dev, dev->driver);
3446 ep0_start(dev);
3447 stat = 0;
3448 }
3449
3450 if (stat)
3451 ep_dbg(dev, "unhandled irqstat1 %08x\n", stat);
3452 }
3453
3454 static irqreturn_t net2280_irq(int irq, void *_dev)
3455 {
3456 struct net2280 *dev = _dev;
3457
3458 /* shared interrupt, not ours */
3459 if ((dev->quirks & PLX_LEGACY) &&
3460 (!(readl(&dev->regs->irqstat0) & BIT(INTA_ASSERTED))))
3461 return IRQ_NONE;
3462
3463 spin_lock(&dev->lock);
3464
3465 /* handle disconnect, dma, and more */
3466 handle_stat1_irqs(dev, readl(&dev->regs->irqstat1));
3467
3468 /* control requests and PIO */
3469 handle_stat0_irqs(dev, readl(&dev->regs->irqstat0));
3470
3471 if (dev->quirks & PLX_PCIE) {
3472 /* re-enable interrupt to trigger any possible new interrupt */
3473 u32 pciirqenb1 = readl(&dev->regs->pciirqenb1);
3474 writel(pciirqenb1 & 0x7FFFFFFF, &dev->regs->pciirqenb1);
3475 writel(pciirqenb1, &dev->regs->pciirqenb1);
3476 }
3477
3478 spin_unlock(&dev->lock);
3479
3480 return IRQ_HANDLED;
3481 }
3482
3483 /*-------------------------------------------------------------------------*/
3484
3485 static void gadget_release(struct device *_dev)
3486 {
3487 struct net2280 *dev = dev_get_drvdata(_dev);
3488
3489 kfree(dev);
3490 }
3491
3492 /* tear down the binding between this driver and the pci device */
3493
3494 static void net2280_remove(struct pci_dev *pdev)
3495 {
3496 struct net2280 *dev = pci_get_drvdata(pdev);
3497
3498 usb_del_gadget_udc(&dev->gadget);
3499
3500 BUG_ON(dev->driver);
3501
3502 /* then clean up the resources we allocated during probe() */
3503 net2280_led_shutdown(dev);
3504 if (dev->requests) {
3505 int i;
3506 for (i = 1; i < 5; i++) {
3507 if (!dev->ep[i].dummy)
3508 continue;
3509 pci_pool_free(dev->requests, dev->ep[i].dummy,
3510 dev->ep[i].td_dma);
3511 }
3512 pci_pool_destroy(dev->requests);
3513 }
3514 if (dev->got_irq)
3515 free_irq(pdev->irq, dev);
3516 if (dev->quirks & PLX_PCIE)
3517 pci_disable_msi(pdev);
3518 if (dev->regs)
3519 iounmap(dev->regs);
3520 if (dev->region)
3521 release_mem_region(pci_resource_start(pdev, 0),
3522 pci_resource_len(pdev, 0));
3523 if (dev->enabled)
3524 pci_disable_device(pdev);
3525 device_remove_file(&pdev->dev, &dev_attr_registers);
3526
3527 ep_info(dev, "unbind\n");
3528 }
3529
3530 /* wrap this driver around the specified device, but
3531 * don't respond over USB until a gadget driver binds to us.
3532 */
3533
3534 static int net2280_probe(struct pci_dev *pdev, const struct pci_device_id *id)
3535 {
3536 struct net2280 *dev;
3537 unsigned long resource, len;
3538 void __iomem *base = NULL;
3539 int retval, i;
3540
3541 /* alloc, and start init */
3542 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
3543 if (dev == NULL) {
3544 retval = -ENOMEM;
3545 goto done;
3546 }
3547
3548 pci_set_drvdata(pdev, dev);
3549 spin_lock_init(&dev->lock);
3550 dev->quirks = id->driver_data;
3551 dev->pdev = pdev;
3552 dev->gadget.ops = &net2280_ops;
3553 dev->gadget.max_speed = (dev->quirks & PLX_SUPERSPEED) ?
3554 USB_SPEED_SUPER : USB_SPEED_HIGH;
3555
3556 /* the "gadget" abstracts/virtualizes the controller */
3557 dev->gadget.name = driver_name;
3558
3559 /* now all the pci goodies ... */
3560 if (pci_enable_device(pdev) < 0) {
3561 retval = -ENODEV;
3562 goto done;
3563 }
3564 dev->enabled = 1;
3565
3566 /* BAR 0 holds all the registers
3567 * BAR 1 is 8051 memory; unused here (note erratum 0103)
3568 * BAR 2 is fifo memory; unused here
3569 */
3570 resource = pci_resource_start(pdev, 0);
3571 len = pci_resource_len(pdev, 0);
3572 if (!request_mem_region(resource, len, driver_name)) {
3573 ep_dbg(dev, "controller already in use\n");
3574 retval = -EBUSY;
3575 goto done;
3576 }
3577 dev->region = 1;
3578
3579 /* FIXME provide firmware download interface to put
3580 * 8051 code into the chip, e.g. to turn on PCI PM.
3581 */
3582
3583 base = ioremap_nocache(resource, len);
3584 if (base == NULL) {
3585 ep_dbg(dev, "can't map memory\n");
3586 retval = -EFAULT;
3587 goto done;
3588 }
3589 dev->regs = (struct net2280_regs __iomem *) base;
3590 dev->usb = (struct net2280_usb_regs __iomem *) (base + 0x0080);
3591 dev->pci = (struct net2280_pci_regs __iomem *) (base + 0x0100);
3592 dev->dma = (struct net2280_dma_regs __iomem *) (base + 0x0180);
3593 dev->dep = (struct net2280_dep_regs __iomem *) (base + 0x0200);
3594 dev->epregs = (struct net2280_ep_regs __iomem *) (base + 0x0300);
3595
3596 if (dev->quirks & PLX_PCIE) {
3597 u32 fsmvalue;
3598 u32 usbstat;
3599 dev->usb_ext = (struct usb338x_usb_ext_regs __iomem *)
3600 (base + 0x00b4);
3601 dev->llregs = (struct usb338x_ll_regs __iomem *)
3602 (base + 0x0700);
3603 dev->ll_lfps_regs = (struct usb338x_ll_lfps_regs __iomem *)
3604 (base + 0x0748);
3605 dev->ll_tsn_regs = (struct usb338x_ll_tsn_regs __iomem *)
3606 (base + 0x077c);
3607 dev->ll_chicken_reg = (struct usb338x_ll_chi_regs __iomem *)
3608 (base + 0x079c);
3609 dev->plregs = (struct usb338x_pl_regs __iomem *)
3610 (base + 0x0800);
3611 usbstat = readl(&dev->usb->usbstat);
3612 dev->enhanced_mode = !!(usbstat & BIT(11));
3613 dev->n_ep = (dev->enhanced_mode) ? 9 : 5;
3614 /* put into initial config, link up all endpoints */
3615 fsmvalue = get_idx_reg(dev->regs, SCRATCH) &
3616 (0xf << DEFECT7374_FSM_FIELD);
3617 /* See if firmware needs to set up for workaround: */
3618 if (fsmvalue == DEFECT7374_FSM_SS_CONTROL_READ) {
3619 dev->bug7734_patched = 1;
3620 writel(0, &dev->usb->usbctl);
3621 } else
3622 dev->bug7734_patched = 0;
3623 } else {
3624 dev->enhanced_mode = 0;
3625 dev->n_ep = 7;
3626 /* put into initial config, link up all endpoints */
3627 writel(0, &dev->usb->usbctl);
3628 }
3629
3630 usb_reset(dev);
3631 usb_reinit(dev);
3632
3633 /* irq setup after old hardware is cleaned up */
3634 if (!pdev->irq) {
3635 ep_err(dev, "No IRQ. Check PCI setup!\n");
3636 retval = -ENODEV;
3637 goto done;
3638 }
3639
3640 if (dev->quirks & PLX_PCIE)
3641 if (pci_enable_msi(pdev))
3642 ep_err(dev, "Failed to enable MSI mode\n");
3643
3644 if (request_irq(pdev->irq, net2280_irq, IRQF_SHARED,
3645 driver_name, dev)) {
3646 ep_err(dev, "request interrupt %d failed\n", pdev->irq);
3647 retval = -EBUSY;
3648 goto done;
3649 }
3650 dev->got_irq = 1;
3651
3652 /* DMA setup */
3653 /* NOTE: we know only the 32 LSBs of dma addresses may be nonzero */
3654 dev->requests = pci_pool_create("requests", pdev,
3655 sizeof(struct net2280_dma),
3656 0 /* no alignment requirements */,
3657 0 /* or page-crossing issues */);
3658 if (!dev->requests) {
3659 ep_dbg(dev, "can't get request pool\n");
3660 retval = -ENOMEM;
3661 goto done;
3662 }
3663 for (i = 1; i < 5; i++) {
3664 struct net2280_dma *td;
3665
3666 td = pci_pool_alloc(dev->requests, GFP_KERNEL,
3667 &dev->ep[i].td_dma);
3668 if (!td) {
3669 ep_dbg(dev, "can't get dummy %d\n", i);
3670 retval = -ENOMEM;
3671 goto done;
3672 }
3673 td->dmacount = 0; /* not VALID */
3674 td->dmadesc = td->dmaaddr;
3675 dev->ep[i].dummy = td;
3676 }
3677
3678 /* enable lower-overhead pci memory bursts during DMA */
3679 if (dev->quirks & PLX_LEGACY)
3680 writel(BIT(DMA_MEMORY_WRITE_AND_INVALIDATE_ENABLE) |
3681 /*
3682 * 256 write retries may not be enough...
3683 BIT(PCI_RETRY_ABORT_ENABLE) |
3684 */
3685 BIT(DMA_READ_MULTIPLE_ENABLE) |
3686 BIT(DMA_READ_LINE_ENABLE),
3687 &dev->pci->pcimstctl);
3688 /* erratum 0115 shouldn't appear: Linux inits PCI_LATENCY_TIMER */
3689 pci_set_master(pdev);
3690 pci_try_set_mwi(pdev);
3691
3692 /* ... also flushes any posted pci writes */
3693 dev->chiprev = get_idx_reg(dev->regs, REG_CHIPREV) & 0xffff;
3694
3695 /* done */
3696 ep_info(dev, "%s\n", driver_desc);
3697 ep_info(dev, "irq %d, pci mem %p, chip rev %04x\n",
3698 pdev->irq, base, dev->chiprev);
3699 ep_info(dev, "version: " DRIVER_VERSION "; %s\n",
3700 dev->enhanced_mode ? "enhanced mode" : "legacy mode");
3701 retval = device_create_file(&pdev->dev, &dev_attr_registers);
3702 if (retval)
3703 goto done;
3704
3705 retval = usb_add_gadget_udc_release(&pdev->dev, &dev->gadget,
3706 gadget_release);
3707 if (retval)
3708 goto done;
3709 return 0;
3710
3711 done:
3712 if (dev)
3713 net2280_remove(pdev);
3714 return retval;
3715 }
3716
3717 /* make sure the board is quiescent; otherwise it will continue
3718 * generating IRQs across the upcoming reboot.
3719 */
3720
3721 static void net2280_shutdown(struct pci_dev *pdev)
3722 {
3723 struct net2280 *dev = pci_get_drvdata(pdev);
3724
3725 /* disable IRQs */
3726 writel(0, &dev->regs->pciirqenb0);
3727 writel(0, &dev->regs->pciirqenb1);
3728
3729 /* disable the pullup so the host will think we're gone */
3730 writel(0, &dev->usb->usbctl);
3731
3732 }
3733
3734
3735 /*-------------------------------------------------------------------------*/
3736
3737 static const struct pci_device_id pci_ids[] = { {
3738 .class = PCI_CLASS_SERIAL_USB_DEVICE,
3739 .class_mask = ~0,
3740 .vendor = PCI_VENDOR_ID_PLX_LEGACY,
3741 .device = 0x2280,
3742 .subvendor = PCI_ANY_ID,
3743 .subdevice = PCI_ANY_ID,
3744 .driver_data = PLX_LEGACY | PLX_2280,
3745 }, {
3746 .class = PCI_CLASS_SERIAL_USB_DEVICE,
3747 .class_mask = ~0,
3748 .vendor = PCI_VENDOR_ID_PLX_LEGACY,
3749 .device = 0x2282,
3750 .subvendor = PCI_ANY_ID,
3751 .subdevice = PCI_ANY_ID,
3752 .driver_data = PLX_LEGACY,
3753 },
3754 {
3755 .class = PCI_CLASS_SERIAL_USB_DEVICE,
3756 .class_mask = ~0,
3757 .vendor = PCI_VENDOR_ID_PLX,
3758 .device = 0x2380,
3759 .subvendor = PCI_ANY_ID,
3760 .subdevice = PCI_ANY_ID,
3761 .driver_data = PLX_PCIE,
3762 },
3763 {
3764 .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe),
3765 .class_mask = ~0,
3766 .vendor = PCI_VENDOR_ID_PLX,
3767 .device = 0x3380,
3768 .subvendor = PCI_ANY_ID,
3769 .subdevice = PCI_ANY_ID,
3770 .driver_data = PLX_PCIE | PLX_SUPERSPEED,
3771 },
3772 {
3773 .class = PCI_CLASS_SERIAL_USB_DEVICE,
3774 .class_mask = ~0,
3775 .vendor = PCI_VENDOR_ID_PLX,
3776 .device = 0x3382,
3777 .subvendor = PCI_ANY_ID,
3778 .subdevice = PCI_ANY_ID,
3779 .driver_data = PLX_PCIE | PLX_SUPERSPEED,
3780 },
3781 { /* end: all zeroes */ }
3782 };
3783 MODULE_DEVICE_TABLE(pci, pci_ids);
3784
3785 /* pci driver glue; this is a "new style" PCI driver module */
3786 static struct pci_driver net2280_pci_driver = {
3787 .name = (char *) driver_name,
3788 .id_table = pci_ids,
3789
3790 .probe = net2280_probe,
3791 .remove = net2280_remove,
3792 .shutdown = net2280_shutdown,
3793
3794 /* FIXME add power management support */
3795 };
3796
3797 module_pci_driver(net2280_pci_driver);
3798
3799 MODULE_DESCRIPTION(DRIVER_DESC);
3800 MODULE_AUTHOR("David Brownell");
3801 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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