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Merge branches 'devel-stable', 'entry', 'fixes', 'mach-types', 'misc' and 'smp-hotplu...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / usb / gadget / net2272.c
1 /*
2 * Driver for PLX NET2272 USB device controller
3 *
4 * Copyright (C) 2005-2006 PLX Technology, Inc.
5 * Copyright (C) 2006-2011 Analog Devices, Inc.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22 #include <linux/delay.h>
23 #include <linux/device.h>
24 #include <linux/errno.h>
25 #include <linux/gpio.h>
26 #include <linux/init.h>
27 #include <linux/interrupt.h>
28 #include <linux/io.h>
29 #include <linux/ioport.h>
30 #include <linux/kernel.h>
31 #include <linux/list.h>
32 #include <linux/module.h>
33 #include <linux/moduleparam.h>
34 #include <linux/pci.h>
35 #include <linux/platform_device.h>
36 #include <linux/prefetch.h>
37 #include <linux/sched.h>
38 #include <linux/slab.h>
39 #include <linux/timer.h>
40 #include <linux/usb.h>
41 #include <linux/usb/ch9.h>
42 #include <linux/usb/gadget.h>
43
44 #include <asm/byteorder.h>
45 #include <asm/unaligned.h>
46
47 #include "net2272.h"
48
49 #define DRIVER_DESC "PLX NET2272 USB Peripheral Controller"
50
51 static const char driver_name[] = "net2272";
52 static const char driver_vers[] = "2006 October 17/mainline";
53 static const char driver_desc[] = DRIVER_DESC;
54
55 static const char ep0name[] = "ep0";
56 static const char * const ep_name[] = {
57 ep0name,
58 "ep-a", "ep-b", "ep-c",
59 };
60
61 #define DMA_ADDR_INVALID (~(dma_addr_t)0)
62 #ifdef CONFIG_USB_NET2272_DMA
63 /*
64 * use_dma: the NET2272 can use an external DMA controller.
65 * Note that since there is no generic DMA api, some functions,
66 * notably request_dma, start_dma, and cancel_dma will need to be
67 * modified for your platform's particular dma controller.
68 *
69 * If use_dma is disabled, pio will be used instead.
70 */
71 static bool use_dma = 0;
72 module_param(use_dma, bool, 0644);
73
74 /*
75 * dma_ep: selects the endpoint for use with dma (1=ep-a, 2=ep-b)
76 * The NET2272 can only use dma for a single endpoint at a time.
77 * At some point this could be modified to allow either endpoint
78 * to take control of dma as it becomes available.
79 *
80 * Note that DMA should not be used on OUT endpoints unless it can
81 * be guaranteed that no short packets will arrive on an IN endpoint
82 * while the DMA operation is pending. Otherwise the OUT DMA will
83 * terminate prematurely (See NET2272 Errata 630-0213-0101)
84 */
85 static ushort dma_ep = 1;
86 module_param(dma_ep, ushort, 0644);
87
88 /*
89 * dma_mode: net2272 dma mode setting (see LOCCTL1 definiton):
90 * mode 0 == Slow DREQ mode
91 * mode 1 == Fast DREQ mode
92 * mode 2 == Burst mode
93 */
94 static ushort dma_mode = 2;
95 module_param(dma_mode, ushort, 0644);
96 #else
97 #define use_dma 0
98 #define dma_ep 1
99 #define dma_mode 2
100 #endif
101
102 /*
103 * fifo_mode: net2272 buffer configuration:
104 * mode 0 == ep-{a,b,c} 512db each
105 * mode 1 == ep-a 1k, ep-{b,c} 512db
106 * mode 2 == ep-a 1k, ep-b 1k, ep-c 512db
107 * mode 3 == ep-a 1k, ep-b disabled, ep-c 512db
108 */
109 static ushort fifo_mode = 0;
110 module_param(fifo_mode, ushort, 0644);
111
112 /*
113 * enable_suspend: When enabled, the driver will respond to
114 * USB suspend requests by powering down the NET2272. Otherwise,
115 * USB suspend requests will be ignored. This is acceptible for
116 * self-powered devices. For bus powered devices set this to 1.
117 */
118 static ushort enable_suspend = 0;
119 module_param(enable_suspend, ushort, 0644);
120
121 static void assert_out_naking(struct net2272_ep *ep, const char *where)
122 {
123 u8 tmp;
124
125 #ifndef DEBUG
126 return;
127 #endif
128
129 tmp = net2272_ep_read(ep, EP_STAT0);
130 if ((tmp & (1 << NAK_OUT_PACKETS)) == 0) {
131 dev_dbg(ep->dev->dev, "%s %s %02x !NAK\n",
132 ep->ep.name, where, tmp);
133 net2272_ep_write(ep, EP_RSPSET, 1 << ALT_NAK_OUT_PACKETS);
134 }
135 }
136 #define ASSERT_OUT_NAKING(ep) assert_out_naking(ep, __func__)
137
138 static void stop_out_naking(struct net2272_ep *ep)
139 {
140 u8 tmp = net2272_ep_read(ep, EP_STAT0);
141
142 if ((tmp & (1 << NAK_OUT_PACKETS)) != 0)
143 net2272_ep_write(ep, EP_RSPCLR, 1 << ALT_NAK_OUT_PACKETS);
144 }
145
146 #define PIPEDIR(bAddress) (usb_pipein(bAddress) ? "in" : "out")
147
148 static char *type_string(u8 bmAttributes)
149 {
150 switch ((bmAttributes) & USB_ENDPOINT_XFERTYPE_MASK) {
151 case USB_ENDPOINT_XFER_BULK: return "bulk";
152 case USB_ENDPOINT_XFER_ISOC: return "iso";
153 case USB_ENDPOINT_XFER_INT: return "intr";
154 default: return "control";
155 }
156 }
157
158 static char *buf_state_string(unsigned state)
159 {
160 switch (state) {
161 case BUFF_FREE: return "free";
162 case BUFF_VALID: return "valid";
163 case BUFF_LCL: return "local";
164 case BUFF_USB: return "usb";
165 default: return "unknown";
166 }
167 }
168
169 static char *dma_mode_string(void)
170 {
171 if (!use_dma)
172 return "PIO";
173 switch (dma_mode) {
174 case 0: return "SLOW DREQ";
175 case 1: return "FAST DREQ";
176 case 2: return "BURST";
177 default: return "invalid";
178 }
179 }
180
181 static void net2272_dequeue_all(struct net2272_ep *);
182 static int net2272_kick_dma(struct net2272_ep *, struct net2272_request *);
183 static int net2272_fifo_status(struct usb_ep *);
184
185 static struct usb_ep_ops net2272_ep_ops;
186
187 /*---------------------------------------------------------------------------*/
188
189 static int
190 net2272_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
191 {
192 struct net2272 *dev;
193 struct net2272_ep *ep;
194 u32 max;
195 u8 tmp;
196 unsigned long flags;
197
198 ep = container_of(_ep, struct net2272_ep, ep);
199 if (!_ep || !desc || ep->desc || _ep->name == ep0name
200 || desc->bDescriptorType != USB_DT_ENDPOINT)
201 return -EINVAL;
202 dev = ep->dev;
203 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
204 return -ESHUTDOWN;
205
206 max = usb_endpoint_maxp(desc) & 0x1fff;
207
208 spin_lock_irqsave(&dev->lock, flags);
209 _ep->maxpacket = max & 0x7fff;
210 ep->desc = desc;
211
212 /* net2272_ep_reset() has already been called */
213 ep->stopped = 0;
214 ep->wedged = 0;
215
216 /* set speed-dependent max packet */
217 net2272_ep_write(ep, EP_MAXPKT0, max & 0xff);
218 net2272_ep_write(ep, EP_MAXPKT1, (max & 0xff00) >> 8);
219
220 /* set type, direction, address; reset fifo counters */
221 net2272_ep_write(ep, EP_STAT1, 1 << BUFFER_FLUSH);
222 tmp = usb_endpoint_type(desc);
223 if (usb_endpoint_xfer_bulk(desc)) {
224 /* catch some particularly blatant driver bugs */
225 if ((dev->gadget.speed == USB_SPEED_HIGH && max != 512) ||
226 (dev->gadget.speed == USB_SPEED_FULL && max > 64)) {
227 spin_unlock_irqrestore(&dev->lock, flags);
228 return -ERANGE;
229 }
230 }
231 ep->is_iso = usb_endpoint_xfer_isoc(desc) ? 1 : 0;
232 tmp <<= ENDPOINT_TYPE;
233 tmp |= ((desc->bEndpointAddress & 0x0f) << ENDPOINT_NUMBER);
234 tmp |= usb_endpoint_dir_in(desc) << ENDPOINT_DIRECTION;
235 tmp |= (1 << ENDPOINT_ENABLE);
236
237 /* for OUT transfers, block the rx fifo until a read is posted */
238 ep->is_in = usb_endpoint_dir_in(desc);
239 if (!ep->is_in)
240 net2272_ep_write(ep, EP_RSPSET, 1 << ALT_NAK_OUT_PACKETS);
241
242 net2272_ep_write(ep, EP_CFG, tmp);
243
244 /* enable irqs */
245 tmp = (1 << ep->num) | net2272_read(dev, IRQENB0);
246 net2272_write(dev, IRQENB0, tmp);
247
248 tmp = (1 << DATA_PACKET_RECEIVED_INTERRUPT_ENABLE)
249 | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE)
250 | net2272_ep_read(ep, EP_IRQENB);
251 net2272_ep_write(ep, EP_IRQENB, tmp);
252
253 tmp = desc->bEndpointAddress;
254 dev_dbg(dev->dev, "enabled %s (ep%d%s-%s) max %04x cfg %02x\n",
255 _ep->name, tmp & 0x0f, PIPEDIR(tmp),
256 type_string(desc->bmAttributes), max,
257 net2272_ep_read(ep, EP_CFG));
258
259 spin_unlock_irqrestore(&dev->lock, flags);
260 return 0;
261 }
262
263 static void net2272_ep_reset(struct net2272_ep *ep)
264 {
265 u8 tmp;
266
267 ep->desc = NULL;
268 INIT_LIST_HEAD(&ep->queue);
269
270 ep->ep.maxpacket = ~0;
271 ep->ep.ops = &net2272_ep_ops;
272
273 /* disable irqs, endpoint */
274 net2272_ep_write(ep, EP_IRQENB, 0);
275
276 /* init to our chosen defaults, notably so that we NAK OUT
277 * packets until the driver queues a read.
278 */
279 tmp = (1 << NAK_OUT_PACKETS_MODE) | (1 << ALT_NAK_OUT_PACKETS);
280 net2272_ep_write(ep, EP_RSPSET, tmp);
281
282 tmp = (1 << INTERRUPT_MODE) | (1 << HIDE_STATUS_PHASE);
283 if (ep->num != 0)
284 tmp |= (1 << ENDPOINT_TOGGLE) | (1 << ENDPOINT_HALT);
285
286 net2272_ep_write(ep, EP_RSPCLR, tmp);
287
288 /* scrub most status bits, and flush any fifo state */
289 net2272_ep_write(ep, EP_STAT0,
290 (1 << DATA_IN_TOKEN_INTERRUPT)
291 | (1 << DATA_OUT_TOKEN_INTERRUPT)
292 | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)
293 | (1 << DATA_PACKET_RECEIVED_INTERRUPT)
294 | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT));
295
296 net2272_ep_write(ep, EP_STAT1,
297 (1 << TIMEOUT)
298 | (1 << USB_OUT_ACK_SENT)
299 | (1 << USB_OUT_NAK_SENT)
300 | (1 << USB_IN_ACK_RCVD)
301 | (1 << USB_IN_NAK_SENT)
302 | (1 << USB_STALL_SENT)
303 | (1 << LOCAL_OUT_ZLP)
304 | (1 << BUFFER_FLUSH));
305
306 /* fifo size is handled seperately */
307 }
308
309 static int net2272_disable(struct usb_ep *_ep)
310 {
311 struct net2272_ep *ep;
312 unsigned long flags;
313
314 ep = container_of(_ep, struct net2272_ep, ep);
315 if (!_ep || !ep->desc || _ep->name == ep0name)
316 return -EINVAL;
317
318 spin_lock_irqsave(&ep->dev->lock, flags);
319 net2272_dequeue_all(ep);
320 net2272_ep_reset(ep);
321
322 dev_vdbg(ep->dev->dev, "disabled %s\n", _ep->name);
323
324 spin_unlock_irqrestore(&ep->dev->lock, flags);
325 return 0;
326 }
327
328 /*---------------------------------------------------------------------------*/
329
330 static struct usb_request *
331 net2272_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
332 {
333 struct net2272_ep *ep;
334 struct net2272_request *req;
335
336 if (!_ep)
337 return NULL;
338 ep = container_of(_ep, struct net2272_ep, ep);
339
340 req = kzalloc(sizeof(*req), gfp_flags);
341 if (!req)
342 return NULL;
343
344 req->req.dma = DMA_ADDR_INVALID;
345 INIT_LIST_HEAD(&req->queue);
346
347 return &req->req;
348 }
349
350 static void
351 net2272_free_request(struct usb_ep *_ep, struct usb_request *_req)
352 {
353 struct net2272_ep *ep;
354 struct net2272_request *req;
355
356 ep = container_of(_ep, struct net2272_ep, ep);
357 if (!_ep || !_req)
358 return;
359
360 req = container_of(_req, struct net2272_request, req);
361 WARN_ON(!list_empty(&req->queue));
362 kfree(req);
363 }
364
365 static void
366 net2272_done(struct net2272_ep *ep, struct net2272_request *req, int status)
367 {
368 struct net2272 *dev;
369 unsigned stopped = ep->stopped;
370
371 if (ep->num == 0) {
372 if (ep->dev->protocol_stall) {
373 ep->stopped = 1;
374 set_halt(ep);
375 }
376 allow_status(ep);
377 }
378
379 list_del_init(&req->queue);
380
381 if (req->req.status == -EINPROGRESS)
382 req->req.status = status;
383 else
384 status = req->req.status;
385
386 dev = ep->dev;
387 if (use_dma && ep->dma)
388 usb_gadget_unmap_request(&dev->gadget, &req->req,
389 ep->is_in);
390
391 if (status && status != -ESHUTDOWN)
392 dev_vdbg(dev->dev, "complete %s req %p stat %d len %u/%u buf %p\n",
393 ep->ep.name, &req->req, status,
394 req->req.actual, req->req.length, req->req.buf);
395
396 /* don't modify queue heads during completion callback */
397 ep->stopped = 1;
398 spin_unlock(&dev->lock);
399 req->req.complete(&ep->ep, &req->req);
400 spin_lock(&dev->lock);
401 ep->stopped = stopped;
402 }
403
404 static int
405 net2272_write_packet(struct net2272_ep *ep, u8 *buf,
406 struct net2272_request *req, unsigned max)
407 {
408 u16 __iomem *ep_data = net2272_reg_addr(ep->dev, EP_DATA);
409 u16 *bufp;
410 unsigned length, count;
411 u8 tmp;
412
413 length = min(req->req.length - req->req.actual, max);
414 req->req.actual += length;
415
416 dev_vdbg(ep->dev->dev, "write packet %s req %p max %u len %u avail %u\n",
417 ep->ep.name, req, max, length,
418 (net2272_ep_read(ep, EP_AVAIL1) << 8) | net2272_ep_read(ep, EP_AVAIL0));
419
420 count = length;
421 bufp = (u16 *)buf;
422
423 while (likely(count >= 2)) {
424 /* no byte-swap required; chip endian set during init */
425 writew(*bufp++, ep_data);
426 count -= 2;
427 }
428 buf = (u8 *)bufp;
429
430 /* write final byte by placing the NET2272 into 8-bit mode */
431 if (unlikely(count)) {
432 tmp = net2272_read(ep->dev, LOCCTL);
433 net2272_write(ep->dev, LOCCTL, tmp & ~(1 << DATA_WIDTH));
434 writeb(*buf, ep_data);
435 net2272_write(ep->dev, LOCCTL, tmp);
436 }
437 return length;
438 }
439
440 /* returns: 0: still running, 1: completed, negative: errno */
441 static int
442 net2272_write_fifo(struct net2272_ep *ep, struct net2272_request *req)
443 {
444 u8 *buf;
445 unsigned count, max;
446 int status;
447
448 dev_vdbg(ep->dev->dev, "write_fifo %s actual %d len %d\n",
449 ep->ep.name, req->req.actual, req->req.length);
450
451 /*
452 * Keep loading the endpoint until the final packet is loaded,
453 * or the endpoint buffer is full.
454 */
455 top:
456 /*
457 * Clear interrupt status
458 * - Packet Transmitted interrupt will become set again when the
459 * host successfully takes another packet
460 */
461 net2272_ep_write(ep, EP_STAT0, (1 << DATA_PACKET_TRANSMITTED_INTERRUPT));
462 while (!(net2272_ep_read(ep, EP_STAT0) & (1 << BUFFER_FULL))) {
463 buf = req->req.buf + req->req.actual;
464 prefetch(buf);
465
466 /* force pagesel */
467 net2272_ep_read(ep, EP_STAT0);
468
469 max = (net2272_ep_read(ep, EP_AVAIL1) << 8) |
470 (net2272_ep_read(ep, EP_AVAIL0));
471
472 if (max < ep->ep.maxpacket)
473 max = (net2272_ep_read(ep, EP_AVAIL1) << 8)
474 | (net2272_ep_read(ep, EP_AVAIL0));
475
476 count = net2272_write_packet(ep, buf, req, max);
477 /* see if we are done */
478 if (req->req.length == req->req.actual) {
479 /* validate short or zlp packet */
480 if (count < ep->ep.maxpacket)
481 set_fifo_bytecount(ep, 0);
482 net2272_done(ep, req, 0);
483
484 if (!list_empty(&ep->queue)) {
485 req = list_entry(ep->queue.next,
486 struct net2272_request,
487 queue);
488 status = net2272_kick_dma(ep, req);
489
490 if (status < 0)
491 if ((net2272_ep_read(ep, EP_STAT0)
492 & (1 << BUFFER_EMPTY)))
493 goto top;
494 }
495 return 1;
496 }
497 net2272_ep_write(ep, EP_STAT0, (1 << DATA_PACKET_TRANSMITTED_INTERRUPT));
498 }
499 return 0;
500 }
501
502 static void
503 net2272_out_flush(struct net2272_ep *ep)
504 {
505 ASSERT_OUT_NAKING(ep);
506
507 net2272_ep_write(ep, EP_STAT0, (1 << DATA_OUT_TOKEN_INTERRUPT)
508 | (1 << DATA_PACKET_RECEIVED_INTERRUPT));
509 net2272_ep_write(ep, EP_STAT1, 1 << BUFFER_FLUSH);
510 }
511
512 static int
513 net2272_read_packet(struct net2272_ep *ep, u8 *buf,
514 struct net2272_request *req, unsigned avail)
515 {
516 u16 __iomem *ep_data = net2272_reg_addr(ep->dev, EP_DATA);
517 unsigned is_short;
518 u16 *bufp;
519
520 req->req.actual += avail;
521
522 dev_vdbg(ep->dev->dev, "read packet %s req %p len %u avail %u\n",
523 ep->ep.name, req, avail,
524 (net2272_ep_read(ep, EP_AVAIL1) << 8) | net2272_ep_read(ep, EP_AVAIL0));
525
526 is_short = (avail < ep->ep.maxpacket);
527
528 if (unlikely(avail == 0)) {
529 /* remove any zlp from the buffer */
530 (void)readw(ep_data);
531 return is_short;
532 }
533
534 /* Ensure we get the final byte */
535 if (unlikely(avail % 2))
536 avail++;
537 bufp = (u16 *)buf;
538
539 do {
540 *bufp++ = readw(ep_data);
541 avail -= 2;
542 } while (avail);
543
544 /*
545 * To avoid false endpoint available race condition must read
546 * ep stat0 twice in the case of a short transfer
547 */
548 if (net2272_ep_read(ep, EP_STAT0) & (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT))
549 net2272_ep_read(ep, EP_STAT0);
550
551 return is_short;
552 }
553
554 static int
555 net2272_read_fifo(struct net2272_ep *ep, struct net2272_request *req)
556 {
557 u8 *buf;
558 unsigned is_short;
559 int count;
560 int tmp;
561 int cleanup = 0;
562 int status = -1;
563
564 dev_vdbg(ep->dev->dev, "read_fifo %s actual %d len %d\n",
565 ep->ep.name, req->req.actual, req->req.length);
566
567 top:
568 do {
569 buf = req->req.buf + req->req.actual;
570 prefetchw(buf);
571
572 count = (net2272_ep_read(ep, EP_AVAIL1) << 8)
573 | net2272_ep_read(ep, EP_AVAIL0);
574
575 net2272_ep_write(ep, EP_STAT0,
576 (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT) |
577 (1 << DATA_PACKET_RECEIVED_INTERRUPT));
578
579 tmp = req->req.length - req->req.actual;
580
581 if (count > tmp) {
582 if ((tmp % ep->ep.maxpacket) != 0) {
583 dev_err(ep->dev->dev,
584 "%s out fifo %d bytes, expected %d\n",
585 ep->ep.name, count, tmp);
586 cleanup = 1;
587 }
588 count = (tmp > 0) ? tmp : 0;
589 }
590
591 is_short = net2272_read_packet(ep, buf, req, count);
592
593 /* completion */
594 if (unlikely(cleanup || is_short ||
595 ((req->req.actual == req->req.length)
596 && !req->req.zero))) {
597
598 if (cleanup) {
599 net2272_out_flush(ep);
600 net2272_done(ep, req, -EOVERFLOW);
601 } else
602 net2272_done(ep, req, 0);
603
604 /* re-initialize endpoint transfer registers
605 * otherwise they may result in erroneous pre-validation
606 * for subsequent control reads
607 */
608 if (unlikely(ep->num == 0)) {
609 net2272_ep_write(ep, EP_TRANSFER2, 0);
610 net2272_ep_write(ep, EP_TRANSFER1, 0);
611 net2272_ep_write(ep, EP_TRANSFER0, 0);
612 }
613
614 if (!list_empty(&ep->queue)) {
615 req = list_entry(ep->queue.next,
616 struct net2272_request, queue);
617 status = net2272_kick_dma(ep, req);
618 if ((status < 0) &&
619 !(net2272_ep_read(ep, EP_STAT0) & (1 << BUFFER_EMPTY)))
620 goto top;
621 }
622 return 1;
623 }
624 } while (!(net2272_ep_read(ep, EP_STAT0) & (1 << BUFFER_EMPTY)));
625
626 return 0;
627 }
628
629 static void
630 net2272_pio_advance(struct net2272_ep *ep)
631 {
632 struct net2272_request *req;
633
634 if (unlikely(list_empty(&ep->queue)))
635 return;
636
637 req = list_entry(ep->queue.next, struct net2272_request, queue);
638 (ep->is_in ? net2272_write_fifo : net2272_read_fifo)(ep, req);
639 }
640
641 /* returns 0 on success, else negative errno */
642 static int
643 net2272_request_dma(struct net2272 *dev, unsigned ep, u32 buf,
644 unsigned len, unsigned dir)
645 {
646 dev_vdbg(dev->dev, "request_dma ep %d buf %08x len %d dir %d\n",
647 ep, buf, len, dir);
648
649 /* The NET2272 only supports a single dma channel */
650 if (dev->dma_busy)
651 return -EBUSY;
652 /*
653 * EP_TRANSFER (used to determine the number of bytes received
654 * in an OUT transfer) is 24 bits wide; don't ask for more than that.
655 */
656 if ((dir == 1) && (len > 0x1000000))
657 return -EINVAL;
658
659 dev->dma_busy = 1;
660
661 /* initialize platform's dma */
662 #ifdef CONFIG_PCI
663 /* NET2272 addr, buffer addr, length, etc. */
664 switch (dev->dev_id) {
665 case PCI_DEVICE_ID_RDK1:
666 /* Setup PLX 9054 DMA mode */
667 writel((1 << LOCAL_BUS_WIDTH) |
668 (1 << TA_READY_INPUT_ENABLE) |
669 (0 << LOCAL_BURST_ENABLE) |
670 (1 << DONE_INTERRUPT_ENABLE) |
671 (1 << LOCAL_ADDRESSING_MODE) |
672 (1 << DEMAND_MODE) |
673 (1 << DMA_EOT_ENABLE) |
674 (1 << FAST_SLOW_TERMINATE_MODE_SELECT) |
675 (1 << DMA_CHANNEL_INTERRUPT_SELECT),
676 dev->rdk1.plx9054_base_addr + DMAMODE0);
677
678 writel(0x100000, dev->rdk1.plx9054_base_addr + DMALADR0);
679 writel(buf, dev->rdk1.plx9054_base_addr + DMAPADR0);
680 writel(len, dev->rdk1.plx9054_base_addr + DMASIZ0);
681 writel((dir << DIRECTION_OF_TRANSFER) |
682 (1 << INTERRUPT_AFTER_TERMINAL_COUNT),
683 dev->rdk1.plx9054_base_addr + DMADPR0);
684 writel((1 << LOCAL_DMA_CHANNEL_0_INTERRUPT_ENABLE) |
685 readl(dev->rdk1.plx9054_base_addr + INTCSR),
686 dev->rdk1.plx9054_base_addr + INTCSR);
687
688 break;
689 }
690 #endif
691
692 net2272_write(dev, DMAREQ,
693 (0 << DMA_BUFFER_VALID) |
694 (1 << DMA_REQUEST_ENABLE) |
695 (1 << DMA_CONTROL_DACK) |
696 (dev->dma_eot_polarity << EOT_POLARITY) |
697 (dev->dma_dack_polarity << DACK_POLARITY) |
698 (dev->dma_dreq_polarity << DREQ_POLARITY) |
699 ((ep >> 1) << DMA_ENDPOINT_SELECT));
700
701 (void) net2272_read(dev, SCRATCH);
702
703 return 0;
704 }
705
706 static void
707 net2272_start_dma(struct net2272 *dev)
708 {
709 /* start platform's dma controller */
710 #ifdef CONFIG_PCI
711 switch (dev->dev_id) {
712 case PCI_DEVICE_ID_RDK1:
713 writeb((1 << CHANNEL_ENABLE) | (1 << CHANNEL_START),
714 dev->rdk1.plx9054_base_addr + DMACSR0);
715 break;
716 }
717 #endif
718 }
719
720 /* returns 0 on success, else negative errno */
721 static int
722 net2272_kick_dma(struct net2272_ep *ep, struct net2272_request *req)
723 {
724 unsigned size;
725 u8 tmp;
726
727 if (!use_dma || (ep->num < 1) || (ep->num > 2) || !ep->dma)
728 return -EINVAL;
729
730 /* don't use dma for odd-length transfers
731 * otherwise, we'd need to deal with the last byte with pio
732 */
733 if (req->req.length & 1)
734 return -EINVAL;
735
736 dev_vdbg(ep->dev->dev, "kick_dma %s req %p dma %08llx\n",
737 ep->ep.name, req, (unsigned long long) req->req.dma);
738
739 net2272_ep_write(ep, EP_RSPSET, 1 << ALT_NAK_OUT_PACKETS);
740
741 /* The NET2272 can only use DMA on one endpoint at a time */
742 if (ep->dev->dma_busy)
743 return -EBUSY;
744
745 /* Make sure we only DMA an even number of bytes (we'll use
746 * pio to complete the transfer)
747 */
748 size = req->req.length;
749 size &= ~1;
750
751 /* device-to-host transfer */
752 if (ep->is_in) {
753 /* initialize platform's dma controller */
754 if (net2272_request_dma(ep->dev, ep->num, req->req.dma, size, 0))
755 /* unable to obtain DMA channel; return error and use pio mode */
756 return -EBUSY;
757 req->req.actual += size;
758
759 /* host-to-device transfer */
760 } else {
761 tmp = net2272_ep_read(ep, EP_STAT0);
762
763 /* initialize platform's dma controller */
764 if (net2272_request_dma(ep->dev, ep->num, req->req.dma, size, 1))
765 /* unable to obtain DMA channel; return error and use pio mode */
766 return -EBUSY;
767
768 if (!(tmp & (1 << BUFFER_EMPTY)))
769 ep->not_empty = 1;
770 else
771 ep->not_empty = 0;
772
773
774 /* allow the endpoint's buffer to fill */
775 net2272_ep_write(ep, EP_RSPCLR, 1 << ALT_NAK_OUT_PACKETS);
776
777 /* this transfer completed and data's already in the fifo
778 * return error so pio gets used.
779 */
780 if (tmp & (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)) {
781
782 /* deassert dreq */
783 net2272_write(ep->dev, DMAREQ,
784 (0 << DMA_BUFFER_VALID) |
785 (0 << DMA_REQUEST_ENABLE) |
786 (1 << DMA_CONTROL_DACK) |
787 (ep->dev->dma_eot_polarity << EOT_POLARITY) |
788 (ep->dev->dma_dack_polarity << DACK_POLARITY) |
789 (ep->dev->dma_dreq_polarity << DREQ_POLARITY) |
790 ((ep->num >> 1) << DMA_ENDPOINT_SELECT));
791
792 return -EBUSY;
793 }
794 }
795
796 /* Don't use per-packet interrupts: use dma interrupts only */
797 net2272_ep_write(ep, EP_IRQENB, 0);
798
799 net2272_start_dma(ep->dev);
800
801 return 0;
802 }
803
804 static void net2272_cancel_dma(struct net2272 *dev)
805 {
806 #ifdef CONFIG_PCI
807 switch (dev->dev_id) {
808 case PCI_DEVICE_ID_RDK1:
809 writeb(0, dev->rdk1.plx9054_base_addr + DMACSR0);
810 writeb(1 << CHANNEL_ABORT, dev->rdk1.plx9054_base_addr + DMACSR0);
811 while (!(readb(dev->rdk1.plx9054_base_addr + DMACSR0) &
812 (1 << CHANNEL_DONE)))
813 continue; /* wait for dma to stabalize */
814
815 /* dma abort generates an interrupt */
816 writeb(1 << CHANNEL_CLEAR_INTERRUPT,
817 dev->rdk1.plx9054_base_addr + DMACSR0);
818 break;
819 }
820 #endif
821
822 dev->dma_busy = 0;
823 }
824
825 /*---------------------------------------------------------------------------*/
826
827 static int
828 net2272_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
829 {
830 struct net2272_request *req;
831 struct net2272_ep *ep;
832 struct net2272 *dev;
833 unsigned long flags;
834 int status = -1;
835 u8 s;
836
837 req = container_of(_req, struct net2272_request, req);
838 if (!_req || !_req->complete || !_req->buf
839 || !list_empty(&req->queue))
840 return -EINVAL;
841 ep = container_of(_ep, struct net2272_ep, ep);
842 if (!_ep || (!ep->desc && ep->num != 0))
843 return -EINVAL;
844 dev = ep->dev;
845 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
846 return -ESHUTDOWN;
847
848 /* set up dma mapping in case the caller didn't */
849 if (use_dma && ep->dma) {
850 status = usb_gadget_map_request(&dev->gadget, _req,
851 ep->is_in);
852 if (status)
853 return status;
854 }
855
856 dev_vdbg(dev->dev, "%s queue req %p, len %d buf %p dma %08llx %s\n",
857 _ep->name, _req, _req->length, _req->buf,
858 (unsigned long long) _req->dma, _req->zero ? "zero" : "!zero");
859
860 spin_lock_irqsave(&dev->lock, flags);
861
862 _req->status = -EINPROGRESS;
863 _req->actual = 0;
864
865 /* kickstart this i/o queue? */
866 if (list_empty(&ep->queue) && !ep->stopped) {
867 /* maybe there's no control data, just status ack */
868 if (ep->num == 0 && _req->length == 0) {
869 net2272_done(ep, req, 0);
870 dev_vdbg(dev->dev, "%s status ack\n", ep->ep.name);
871 goto done;
872 }
873
874 /* Return zlp, don't let it block subsequent packets */
875 s = net2272_ep_read(ep, EP_STAT0);
876 if (s & (1 << BUFFER_EMPTY)) {
877 /* Buffer is empty check for a blocking zlp, handle it */
878 if ((s & (1 << NAK_OUT_PACKETS)) &&
879 net2272_ep_read(ep, EP_STAT1) & (1 << LOCAL_OUT_ZLP)) {
880 dev_dbg(dev->dev, "WARNING: returning ZLP short packet termination!\n");
881 /*
882 * Request is going to terminate with a short packet ...
883 * hope the client is ready for it!
884 */
885 status = net2272_read_fifo(ep, req);
886 /* clear short packet naking */
887 net2272_ep_write(ep, EP_STAT0, (1 << NAK_OUT_PACKETS));
888 goto done;
889 }
890 }
891
892 /* try dma first */
893 status = net2272_kick_dma(ep, req);
894
895 if (status < 0) {
896 /* dma failed (most likely in use by another endpoint)
897 * fallback to pio
898 */
899 status = 0;
900
901 if (ep->is_in)
902 status = net2272_write_fifo(ep, req);
903 else {
904 s = net2272_ep_read(ep, EP_STAT0);
905 if ((s & (1 << BUFFER_EMPTY)) == 0)
906 status = net2272_read_fifo(ep, req);
907 }
908
909 if (unlikely(status != 0)) {
910 if (status > 0)
911 status = 0;
912 req = NULL;
913 }
914 }
915 }
916 if (likely(req != 0))
917 list_add_tail(&req->queue, &ep->queue);
918
919 if (likely(!list_empty(&ep->queue)))
920 net2272_ep_write(ep, EP_RSPCLR, 1 << ALT_NAK_OUT_PACKETS);
921 done:
922 spin_unlock_irqrestore(&dev->lock, flags);
923
924 return 0;
925 }
926
927 /* dequeue ALL requests */
928 static void
929 net2272_dequeue_all(struct net2272_ep *ep)
930 {
931 struct net2272_request *req;
932
933 /* called with spinlock held */
934 ep->stopped = 1;
935
936 while (!list_empty(&ep->queue)) {
937 req = list_entry(ep->queue.next,
938 struct net2272_request,
939 queue);
940 net2272_done(ep, req, -ESHUTDOWN);
941 }
942 }
943
944 /* dequeue JUST ONE request */
945 static int
946 net2272_dequeue(struct usb_ep *_ep, struct usb_request *_req)
947 {
948 struct net2272_ep *ep;
949 struct net2272_request *req;
950 unsigned long flags;
951 int stopped;
952
953 ep = container_of(_ep, struct net2272_ep, ep);
954 if (!_ep || (!ep->desc && ep->num != 0) || !_req)
955 return -EINVAL;
956
957 spin_lock_irqsave(&ep->dev->lock, flags);
958 stopped = ep->stopped;
959 ep->stopped = 1;
960
961 /* make sure it's still queued on this endpoint */
962 list_for_each_entry(req, &ep->queue, queue) {
963 if (&req->req == _req)
964 break;
965 }
966 if (&req->req != _req) {
967 spin_unlock_irqrestore(&ep->dev->lock, flags);
968 return -EINVAL;
969 }
970
971 /* queue head may be partially complete */
972 if (ep->queue.next == &req->queue) {
973 dev_dbg(ep->dev->dev, "unlink (%s) pio\n", _ep->name);
974 net2272_done(ep, req, -ECONNRESET);
975 }
976 req = NULL;
977 ep->stopped = stopped;
978
979 spin_unlock_irqrestore(&ep->dev->lock, flags);
980 return 0;
981 }
982
983 /*---------------------------------------------------------------------------*/
984
985 static int
986 net2272_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged)
987 {
988 struct net2272_ep *ep;
989 unsigned long flags;
990 int ret = 0;
991
992 ep = container_of(_ep, struct net2272_ep, ep);
993 if (!_ep || (!ep->desc && ep->num != 0))
994 return -EINVAL;
995 if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN)
996 return -ESHUTDOWN;
997 if (ep->desc /* not ep0 */ && usb_endpoint_xfer_isoc(ep->desc))
998 return -EINVAL;
999
1000 spin_lock_irqsave(&ep->dev->lock, flags);
1001 if (!list_empty(&ep->queue))
1002 ret = -EAGAIN;
1003 else if (ep->is_in && value && net2272_fifo_status(_ep) != 0)
1004 ret = -EAGAIN;
1005 else {
1006 dev_vdbg(ep->dev->dev, "%s %s %s\n", _ep->name,
1007 value ? "set" : "clear",
1008 wedged ? "wedge" : "halt");
1009 /* set/clear */
1010 if (value) {
1011 if (ep->num == 0)
1012 ep->dev->protocol_stall = 1;
1013 else
1014 set_halt(ep);
1015 if (wedged)
1016 ep->wedged = 1;
1017 } else {
1018 clear_halt(ep);
1019 ep->wedged = 0;
1020 }
1021 }
1022 spin_unlock_irqrestore(&ep->dev->lock, flags);
1023
1024 return ret;
1025 }
1026
1027 static int
1028 net2272_set_halt(struct usb_ep *_ep, int value)
1029 {
1030 return net2272_set_halt_and_wedge(_ep, value, 0);
1031 }
1032
1033 static int
1034 net2272_set_wedge(struct usb_ep *_ep)
1035 {
1036 if (!_ep || _ep->name == ep0name)
1037 return -EINVAL;
1038 return net2272_set_halt_and_wedge(_ep, 1, 1);
1039 }
1040
1041 static int
1042 net2272_fifo_status(struct usb_ep *_ep)
1043 {
1044 struct net2272_ep *ep;
1045 u16 avail;
1046
1047 ep = container_of(_ep, struct net2272_ep, ep);
1048 if (!_ep || (!ep->desc && ep->num != 0))
1049 return -ENODEV;
1050 if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN)
1051 return -ESHUTDOWN;
1052
1053 avail = net2272_ep_read(ep, EP_AVAIL1) << 8;
1054 avail |= net2272_ep_read(ep, EP_AVAIL0);
1055 if (avail > ep->fifo_size)
1056 return -EOVERFLOW;
1057 if (ep->is_in)
1058 avail = ep->fifo_size - avail;
1059 return avail;
1060 }
1061
1062 static void
1063 net2272_fifo_flush(struct usb_ep *_ep)
1064 {
1065 struct net2272_ep *ep;
1066
1067 ep = container_of(_ep, struct net2272_ep, ep);
1068 if (!_ep || (!ep->desc && ep->num != 0))
1069 return;
1070 if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN)
1071 return;
1072
1073 net2272_ep_write(ep, EP_STAT1, 1 << BUFFER_FLUSH);
1074 }
1075
1076 static struct usb_ep_ops net2272_ep_ops = {
1077 .enable = net2272_enable,
1078 .disable = net2272_disable,
1079
1080 .alloc_request = net2272_alloc_request,
1081 .free_request = net2272_free_request,
1082
1083 .queue = net2272_queue,
1084 .dequeue = net2272_dequeue,
1085
1086 .set_halt = net2272_set_halt,
1087 .set_wedge = net2272_set_wedge,
1088 .fifo_status = net2272_fifo_status,
1089 .fifo_flush = net2272_fifo_flush,
1090 };
1091
1092 /*---------------------------------------------------------------------------*/
1093
1094 static int
1095 net2272_get_frame(struct usb_gadget *_gadget)
1096 {
1097 struct net2272 *dev;
1098 unsigned long flags;
1099 u16 ret;
1100
1101 if (!_gadget)
1102 return -ENODEV;
1103 dev = container_of(_gadget, struct net2272, gadget);
1104 spin_lock_irqsave(&dev->lock, flags);
1105
1106 ret = net2272_read(dev, FRAME1) << 8;
1107 ret |= net2272_read(dev, FRAME0);
1108
1109 spin_unlock_irqrestore(&dev->lock, flags);
1110 return ret;
1111 }
1112
1113 static int
1114 net2272_wakeup(struct usb_gadget *_gadget)
1115 {
1116 struct net2272 *dev;
1117 u8 tmp;
1118 unsigned long flags;
1119
1120 if (!_gadget)
1121 return 0;
1122 dev = container_of(_gadget, struct net2272, gadget);
1123
1124 spin_lock_irqsave(&dev->lock, flags);
1125 tmp = net2272_read(dev, USBCTL0);
1126 if (tmp & (1 << IO_WAKEUP_ENABLE))
1127 net2272_write(dev, USBCTL1, (1 << GENERATE_RESUME));
1128
1129 spin_unlock_irqrestore(&dev->lock, flags);
1130
1131 return 0;
1132 }
1133
1134 static int
1135 net2272_set_selfpowered(struct usb_gadget *_gadget, int value)
1136 {
1137 struct net2272 *dev;
1138
1139 if (!_gadget)
1140 return -ENODEV;
1141 dev = container_of(_gadget, struct net2272, gadget);
1142
1143 dev->is_selfpowered = value;
1144
1145 return 0;
1146 }
1147
1148 static int
1149 net2272_pullup(struct usb_gadget *_gadget, int is_on)
1150 {
1151 struct net2272 *dev;
1152 u8 tmp;
1153 unsigned long flags;
1154
1155 if (!_gadget)
1156 return -ENODEV;
1157 dev = container_of(_gadget, struct net2272, gadget);
1158
1159 spin_lock_irqsave(&dev->lock, flags);
1160 tmp = net2272_read(dev, USBCTL0);
1161 dev->softconnect = (is_on != 0);
1162 if (is_on)
1163 tmp |= (1 << USB_DETECT_ENABLE);
1164 else
1165 tmp &= ~(1 << USB_DETECT_ENABLE);
1166 net2272_write(dev, USBCTL0, tmp);
1167 spin_unlock_irqrestore(&dev->lock, flags);
1168
1169 return 0;
1170 }
1171
1172 static int net2272_start(struct usb_gadget *_gadget,
1173 struct usb_gadget_driver *driver);
1174 static int net2272_stop(struct usb_gadget *_gadget,
1175 struct usb_gadget_driver *driver);
1176
1177 static const struct usb_gadget_ops net2272_ops = {
1178 .get_frame = net2272_get_frame,
1179 .wakeup = net2272_wakeup,
1180 .set_selfpowered = net2272_set_selfpowered,
1181 .pullup = net2272_pullup,
1182 .udc_start = net2272_start,
1183 .udc_stop = net2272_stop,
1184 };
1185
1186 /*---------------------------------------------------------------------------*/
1187
1188 static ssize_t
1189 net2272_show_registers(struct device *_dev, struct device_attribute *attr, char *buf)
1190 {
1191 struct net2272 *dev;
1192 char *next;
1193 unsigned size, t;
1194 unsigned long flags;
1195 u8 t1, t2;
1196 int i;
1197 const char *s;
1198
1199 dev = dev_get_drvdata(_dev);
1200 next = buf;
1201 size = PAGE_SIZE;
1202 spin_lock_irqsave(&dev->lock, flags);
1203
1204 if (dev->driver)
1205 s = dev->driver->driver.name;
1206 else
1207 s = "(none)";
1208
1209 /* Main Control Registers */
1210 t = scnprintf(next, size, "%s version %s,"
1211 "chiprev %02x, locctl %02x\n"
1212 "irqenb0 %02x irqenb1 %02x "
1213 "irqstat0 %02x irqstat1 %02x\n",
1214 driver_name, driver_vers, dev->chiprev,
1215 net2272_read(dev, LOCCTL),
1216 net2272_read(dev, IRQENB0),
1217 net2272_read(dev, IRQENB1),
1218 net2272_read(dev, IRQSTAT0),
1219 net2272_read(dev, IRQSTAT1));
1220 size -= t;
1221 next += t;
1222
1223 /* DMA */
1224 t1 = net2272_read(dev, DMAREQ);
1225 t = scnprintf(next, size, "\ndmareq %02x: %s %s%s%s%s\n",
1226 t1, ep_name[(t1 & 0x01) + 1],
1227 t1 & (1 << DMA_CONTROL_DACK) ? "dack " : "",
1228 t1 & (1 << DMA_REQUEST_ENABLE) ? "reqenb " : "",
1229 t1 & (1 << DMA_REQUEST) ? "req " : "",
1230 t1 & (1 << DMA_BUFFER_VALID) ? "valid " : "");
1231 size -= t;
1232 next += t;
1233
1234 /* USB Control Registers */
1235 t1 = net2272_read(dev, USBCTL1);
1236 if (t1 & (1 << VBUS_PIN)) {
1237 if (t1 & (1 << USB_HIGH_SPEED))
1238 s = "high speed";
1239 else if (dev->gadget.speed == USB_SPEED_UNKNOWN)
1240 s = "powered";
1241 else
1242 s = "full speed";
1243 } else
1244 s = "not attached";
1245 t = scnprintf(next, size,
1246 "usbctl0 %02x usbctl1 %02x addr 0x%02x (%s)\n",
1247 net2272_read(dev, USBCTL0), t1,
1248 net2272_read(dev, OURADDR), s);
1249 size -= t;
1250 next += t;
1251
1252 /* Endpoint Registers */
1253 for (i = 0; i < 4; ++i) {
1254 struct net2272_ep *ep;
1255
1256 ep = &dev->ep[i];
1257 if (i && !ep->desc)
1258 continue;
1259
1260 t1 = net2272_ep_read(ep, EP_CFG);
1261 t2 = net2272_ep_read(ep, EP_RSPSET);
1262 t = scnprintf(next, size,
1263 "\n%s\tcfg %02x rsp (%02x) %s%s%s%s%s%s%s%s"
1264 "irqenb %02x\n",
1265 ep->ep.name, t1, t2,
1266 (t2 & (1 << ALT_NAK_OUT_PACKETS)) ? "NAK " : "",
1267 (t2 & (1 << HIDE_STATUS_PHASE)) ? "hide " : "",
1268 (t2 & (1 << AUTOVALIDATE)) ? "auto " : "",
1269 (t2 & (1 << INTERRUPT_MODE)) ? "interrupt " : "",
1270 (t2 & (1 << CONTROL_STATUS_PHASE_HANDSHAKE)) ? "status " : "",
1271 (t2 & (1 << NAK_OUT_PACKETS_MODE)) ? "NAKmode " : "",
1272 (t2 & (1 << ENDPOINT_TOGGLE)) ? "DATA1 " : "DATA0 ",
1273 (t2 & (1 << ENDPOINT_HALT)) ? "HALT " : "",
1274 net2272_ep_read(ep, EP_IRQENB));
1275 size -= t;
1276 next += t;
1277
1278 t = scnprintf(next, size,
1279 "\tstat0 %02x stat1 %02x avail %04x "
1280 "(ep%d%s-%s)%s\n",
1281 net2272_ep_read(ep, EP_STAT0),
1282 net2272_ep_read(ep, EP_STAT1),
1283 (net2272_ep_read(ep, EP_AVAIL1) << 8) | net2272_ep_read(ep, EP_AVAIL0),
1284 t1 & 0x0f,
1285 ep->is_in ? "in" : "out",
1286 type_string(t1 >> 5),
1287 ep->stopped ? "*" : "");
1288 size -= t;
1289 next += t;
1290
1291 t = scnprintf(next, size,
1292 "\tep_transfer %06x\n",
1293 ((net2272_ep_read(ep, EP_TRANSFER2) & 0xff) << 16) |
1294 ((net2272_ep_read(ep, EP_TRANSFER1) & 0xff) << 8) |
1295 ((net2272_ep_read(ep, EP_TRANSFER0) & 0xff)));
1296 size -= t;
1297 next += t;
1298
1299 t1 = net2272_ep_read(ep, EP_BUFF_STATES) & 0x03;
1300 t2 = (net2272_ep_read(ep, EP_BUFF_STATES) >> 2) & 0x03;
1301 t = scnprintf(next, size,
1302 "\tbuf-a %s buf-b %s\n",
1303 buf_state_string(t1),
1304 buf_state_string(t2));
1305 size -= t;
1306 next += t;
1307 }
1308
1309 spin_unlock_irqrestore(&dev->lock, flags);
1310
1311 return PAGE_SIZE - size;
1312 }
1313 static DEVICE_ATTR(registers, S_IRUGO, net2272_show_registers, NULL);
1314
1315 /*---------------------------------------------------------------------------*/
1316
1317 static void
1318 net2272_set_fifo_mode(struct net2272 *dev, int mode)
1319 {
1320 u8 tmp;
1321
1322 tmp = net2272_read(dev, LOCCTL) & 0x3f;
1323 tmp |= (mode << 6);
1324 net2272_write(dev, LOCCTL, tmp);
1325
1326 INIT_LIST_HEAD(&dev->gadget.ep_list);
1327
1328 /* always ep-a, ep-c ... maybe not ep-b */
1329 list_add_tail(&dev->ep[1].ep.ep_list, &dev->gadget.ep_list);
1330
1331 switch (mode) {
1332 case 0:
1333 list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list);
1334 dev->ep[1].fifo_size = dev->ep[2].fifo_size = 512;
1335 break;
1336 case 1:
1337 list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list);
1338 dev->ep[1].fifo_size = 1024;
1339 dev->ep[2].fifo_size = 512;
1340 break;
1341 case 2:
1342 list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list);
1343 dev->ep[1].fifo_size = dev->ep[2].fifo_size = 1024;
1344 break;
1345 case 3:
1346 dev->ep[1].fifo_size = 1024;
1347 break;
1348 }
1349
1350 /* ep-c is always 2 512 byte buffers */
1351 list_add_tail(&dev->ep[3].ep.ep_list, &dev->gadget.ep_list);
1352 dev->ep[3].fifo_size = 512;
1353 }
1354
1355 /*---------------------------------------------------------------------------*/
1356
1357 static void
1358 net2272_usb_reset(struct net2272 *dev)
1359 {
1360 dev->gadget.speed = USB_SPEED_UNKNOWN;
1361
1362 net2272_cancel_dma(dev);
1363
1364 net2272_write(dev, IRQENB0, 0);
1365 net2272_write(dev, IRQENB1, 0);
1366
1367 /* clear irq state */
1368 net2272_write(dev, IRQSTAT0, 0xff);
1369 net2272_write(dev, IRQSTAT1, ~(1 << SUSPEND_REQUEST_INTERRUPT));
1370
1371 net2272_write(dev, DMAREQ,
1372 (0 << DMA_BUFFER_VALID) |
1373 (0 << DMA_REQUEST_ENABLE) |
1374 (1 << DMA_CONTROL_DACK) |
1375 (dev->dma_eot_polarity << EOT_POLARITY) |
1376 (dev->dma_dack_polarity << DACK_POLARITY) |
1377 (dev->dma_dreq_polarity << DREQ_POLARITY) |
1378 ((dma_ep >> 1) << DMA_ENDPOINT_SELECT));
1379
1380 net2272_cancel_dma(dev);
1381 net2272_set_fifo_mode(dev, (fifo_mode <= 3) ? fifo_mode : 0);
1382
1383 /* Set the NET2272 ep fifo data width to 16-bit mode and for correct byte swapping
1384 * note that the higher level gadget drivers are expected to convert data to little endian.
1385 * Enable byte swap for your local bus/cpu if needed by setting BYTE_SWAP in LOCCTL here
1386 */
1387 net2272_write(dev, LOCCTL, net2272_read(dev, LOCCTL) | (1 << DATA_WIDTH));
1388 net2272_write(dev, LOCCTL1, (dma_mode << DMA_MODE));
1389 }
1390
1391 static void
1392 net2272_usb_reinit(struct net2272 *dev)
1393 {
1394 int i;
1395
1396 /* basic endpoint init */
1397 for (i = 0; i < 4; ++i) {
1398 struct net2272_ep *ep = &dev->ep[i];
1399
1400 ep->ep.name = ep_name[i];
1401 ep->dev = dev;
1402 ep->num = i;
1403 ep->not_empty = 0;
1404
1405 if (use_dma && ep->num == dma_ep)
1406 ep->dma = 1;
1407
1408 if (i > 0 && i <= 3)
1409 ep->fifo_size = 512;
1410 else
1411 ep->fifo_size = 64;
1412 net2272_ep_reset(ep);
1413 }
1414 dev->ep[0].ep.maxpacket = 64;
1415
1416 dev->gadget.ep0 = &dev->ep[0].ep;
1417 dev->ep[0].stopped = 0;
1418 INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
1419 }
1420
1421 static void
1422 net2272_ep0_start(struct net2272 *dev)
1423 {
1424 struct net2272_ep *ep0 = &dev->ep[0];
1425
1426 net2272_ep_write(ep0, EP_RSPSET,
1427 (1 << NAK_OUT_PACKETS_MODE) |
1428 (1 << ALT_NAK_OUT_PACKETS));
1429 net2272_ep_write(ep0, EP_RSPCLR,
1430 (1 << HIDE_STATUS_PHASE) |
1431 (1 << CONTROL_STATUS_PHASE_HANDSHAKE));
1432 net2272_write(dev, USBCTL0,
1433 (dev->softconnect << USB_DETECT_ENABLE) |
1434 (1 << USB_ROOT_PORT_WAKEUP_ENABLE) |
1435 (1 << IO_WAKEUP_ENABLE));
1436 net2272_write(dev, IRQENB0,
1437 (1 << SETUP_PACKET_INTERRUPT_ENABLE) |
1438 (1 << ENDPOINT_0_INTERRUPT_ENABLE) |
1439 (1 << DMA_DONE_INTERRUPT_ENABLE));
1440 net2272_write(dev, IRQENB1,
1441 (1 << VBUS_INTERRUPT_ENABLE) |
1442 (1 << ROOT_PORT_RESET_INTERRUPT_ENABLE) |
1443 (1 << SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE));
1444 }
1445
1446 /* when a driver is successfully registered, it will receive
1447 * control requests including set_configuration(), which enables
1448 * non-control requests. then usb traffic follows until a
1449 * disconnect is reported. then a host may connect again, or
1450 * the driver might get unbound.
1451 */
1452 static int net2272_start(struct usb_gadget *_gadget,
1453 struct usb_gadget_driver *driver)
1454 {
1455 struct net2272 *dev;
1456 unsigned i;
1457
1458 if (!driver || !driver->unbind || !driver->setup ||
1459 driver->max_speed != USB_SPEED_HIGH)
1460 return -EINVAL;
1461
1462 dev = container_of(_gadget, struct net2272, gadget);
1463
1464 for (i = 0; i < 4; ++i)
1465 dev->ep[i].irqs = 0;
1466 /* hook up the driver ... */
1467 dev->softconnect = 1;
1468 driver->driver.bus = NULL;
1469 dev->driver = driver;
1470 dev->gadget.dev.driver = &driver->driver;
1471
1472 /* ... then enable host detection and ep0; and we're ready
1473 * for set_configuration as well as eventual disconnect.
1474 */
1475 net2272_ep0_start(dev);
1476
1477 dev_dbg(dev->dev, "%s ready\n", driver->driver.name);
1478
1479 return 0;
1480 }
1481
1482 static void
1483 stop_activity(struct net2272 *dev, struct usb_gadget_driver *driver)
1484 {
1485 int i;
1486
1487 /* don't disconnect if it's not connected */
1488 if (dev->gadget.speed == USB_SPEED_UNKNOWN)
1489 driver = NULL;
1490
1491 /* stop hardware; prevent new request submissions;
1492 * and kill any outstanding requests.
1493 */
1494 net2272_usb_reset(dev);
1495 for (i = 0; i < 4; ++i)
1496 net2272_dequeue_all(&dev->ep[i]);
1497
1498 /* report disconnect; the driver is already quiesced */
1499 if (driver) {
1500 spin_unlock(&dev->lock);
1501 driver->disconnect(&dev->gadget);
1502 spin_lock(&dev->lock);
1503 }
1504
1505 net2272_usb_reinit(dev);
1506 }
1507
1508 static int net2272_stop(struct usb_gadget *_gadget,
1509 struct usb_gadget_driver *driver)
1510 {
1511 struct net2272 *dev;
1512 unsigned long flags;
1513
1514 dev = container_of(_gadget, struct net2272, gadget);
1515
1516 spin_lock_irqsave(&dev->lock, flags);
1517 stop_activity(dev, driver);
1518 spin_unlock_irqrestore(&dev->lock, flags);
1519
1520 dev->gadget.dev.driver = NULL;
1521 dev->driver = NULL;
1522
1523 dev_dbg(dev->dev, "unregistered driver '%s'\n", driver->driver.name);
1524 return 0;
1525 }
1526
1527 /*---------------------------------------------------------------------------*/
1528 /* handle ep-a/ep-b dma completions */
1529 static void
1530 net2272_handle_dma(struct net2272_ep *ep)
1531 {
1532 struct net2272_request *req;
1533 unsigned len;
1534 int status;
1535
1536 if (!list_empty(&ep->queue))
1537 req = list_entry(ep->queue.next,
1538 struct net2272_request, queue);
1539 else
1540 req = NULL;
1541
1542 dev_vdbg(ep->dev->dev, "handle_dma %s req %p\n", ep->ep.name, req);
1543
1544 /* Ensure DREQ is de-asserted */
1545 net2272_write(ep->dev, DMAREQ,
1546 (0 << DMA_BUFFER_VALID)
1547 | (0 << DMA_REQUEST_ENABLE)
1548 | (1 << DMA_CONTROL_DACK)
1549 | (ep->dev->dma_eot_polarity << EOT_POLARITY)
1550 | (ep->dev->dma_dack_polarity << DACK_POLARITY)
1551 | (ep->dev->dma_dreq_polarity << DREQ_POLARITY)
1552 | ((ep->dma >> 1) << DMA_ENDPOINT_SELECT));
1553
1554 ep->dev->dma_busy = 0;
1555
1556 net2272_ep_write(ep, EP_IRQENB,
1557 (1 << DATA_PACKET_RECEIVED_INTERRUPT_ENABLE)
1558 | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE)
1559 | net2272_ep_read(ep, EP_IRQENB));
1560
1561 /* device-to-host transfer completed */
1562 if (ep->is_in) {
1563 /* validate a short packet or zlp if necessary */
1564 if ((req->req.length % ep->ep.maxpacket != 0) ||
1565 req->req.zero)
1566 set_fifo_bytecount(ep, 0);
1567
1568 net2272_done(ep, req, 0);
1569 if (!list_empty(&ep->queue)) {
1570 req = list_entry(ep->queue.next,
1571 struct net2272_request, queue);
1572 status = net2272_kick_dma(ep, req);
1573 if (status < 0)
1574 net2272_pio_advance(ep);
1575 }
1576
1577 /* host-to-device transfer completed */
1578 } else {
1579 /* terminated with a short packet? */
1580 if (net2272_read(ep->dev, IRQSTAT0) &
1581 (1 << DMA_DONE_INTERRUPT)) {
1582 /* abort system dma */
1583 net2272_cancel_dma(ep->dev);
1584 }
1585
1586 /* EP_TRANSFER will contain the number of bytes
1587 * actually received.
1588 * NOTE: There is no overflow detection on EP_TRANSFER:
1589 * We can't deal with transfers larger than 2^24 bytes!
1590 */
1591 len = (net2272_ep_read(ep, EP_TRANSFER2) << 16)
1592 | (net2272_ep_read(ep, EP_TRANSFER1) << 8)
1593 | (net2272_ep_read(ep, EP_TRANSFER0));
1594
1595 if (ep->not_empty)
1596 len += 4;
1597
1598 req->req.actual += len;
1599
1600 /* get any remaining data */
1601 net2272_pio_advance(ep);
1602 }
1603 }
1604
1605 /*---------------------------------------------------------------------------*/
1606
1607 static void
1608 net2272_handle_ep(struct net2272_ep *ep)
1609 {
1610 struct net2272_request *req;
1611 u8 stat0, stat1;
1612
1613 if (!list_empty(&ep->queue))
1614 req = list_entry(ep->queue.next,
1615 struct net2272_request, queue);
1616 else
1617 req = NULL;
1618
1619 /* ack all, and handle what we care about */
1620 stat0 = net2272_ep_read(ep, EP_STAT0);
1621 stat1 = net2272_ep_read(ep, EP_STAT1);
1622 ep->irqs++;
1623
1624 dev_vdbg(ep->dev->dev, "%s ack ep_stat0 %02x, ep_stat1 %02x, req %p\n",
1625 ep->ep.name, stat0, stat1, req ? &req->req : 0);
1626
1627 net2272_ep_write(ep, EP_STAT0, stat0 &
1628 ~((1 << NAK_OUT_PACKETS)
1629 | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)));
1630 net2272_ep_write(ep, EP_STAT1, stat1);
1631
1632 /* data packet(s) received (in the fifo, OUT)
1633 * direction must be validated, otherwise control read status phase
1634 * could be interpreted as a valid packet
1635 */
1636 if (!ep->is_in && (stat0 & (1 << DATA_PACKET_RECEIVED_INTERRUPT)))
1637 net2272_pio_advance(ep);
1638 /* data packet(s) transmitted (IN) */
1639 else if (stat0 & (1 << DATA_PACKET_TRANSMITTED_INTERRUPT))
1640 net2272_pio_advance(ep);
1641 }
1642
1643 static struct net2272_ep *
1644 net2272_get_ep_by_addr(struct net2272 *dev, u16 wIndex)
1645 {
1646 struct net2272_ep *ep;
1647
1648 if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0)
1649 return &dev->ep[0];
1650
1651 list_for_each_entry(ep, &dev->gadget.ep_list, ep.ep_list) {
1652 u8 bEndpointAddress;
1653
1654 if (!ep->desc)
1655 continue;
1656 bEndpointAddress = ep->desc->bEndpointAddress;
1657 if ((wIndex ^ bEndpointAddress) & USB_DIR_IN)
1658 continue;
1659 if ((wIndex & 0x0f) == (bEndpointAddress & 0x0f))
1660 return ep;
1661 }
1662 return NULL;
1663 }
1664
1665 /*
1666 * USB Test Packet:
1667 * JKJKJKJK * 9
1668 * JJKKJJKK * 8
1669 * JJJJKKKK * 8
1670 * JJJJJJJKKKKKKK * 8
1671 * JJJJJJJK * 8
1672 * {JKKKKKKK * 10}, JK
1673 */
1674 static const u8 net2272_test_packet[] = {
1675 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
1676 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA,
1677 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE,
1678 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
1679 0x7F, 0xBF, 0xDF, 0xEF, 0xF7, 0xFB, 0xFD,
1680 0xFC, 0x7E, 0xBF, 0xDF, 0xEF, 0xF7, 0xFD, 0x7E
1681 };
1682
1683 static void
1684 net2272_set_test_mode(struct net2272 *dev, int mode)
1685 {
1686 int i;
1687
1688 /* Disable all net2272 interrupts:
1689 * Nothing but a power cycle should stop the test.
1690 */
1691 net2272_write(dev, IRQENB0, 0x00);
1692 net2272_write(dev, IRQENB1, 0x00);
1693
1694 /* Force tranceiver to high-speed */
1695 net2272_write(dev, XCVRDIAG, 1 << FORCE_HIGH_SPEED);
1696
1697 net2272_write(dev, PAGESEL, 0);
1698 net2272_write(dev, EP_STAT0, 1 << DATA_PACKET_TRANSMITTED_INTERRUPT);
1699 net2272_write(dev, EP_RSPCLR,
1700 (1 << CONTROL_STATUS_PHASE_HANDSHAKE)
1701 | (1 << HIDE_STATUS_PHASE));
1702 net2272_write(dev, EP_CFG, 1 << ENDPOINT_DIRECTION);
1703 net2272_write(dev, EP_STAT1, 1 << BUFFER_FLUSH);
1704
1705 /* wait for status phase to complete */
1706 while (!(net2272_read(dev, EP_STAT0) &
1707 (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)))
1708 ;
1709
1710 /* Enable test mode */
1711 net2272_write(dev, USBTEST, mode);
1712
1713 /* load test packet */
1714 if (mode == TEST_PACKET) {
1715 /* switch to 8 bit mode */
1716 net2272_write(dev, LOCCTL, net2272_read(dev, LOCCTL) &
1717 ~(1 << DATA_WIDTH));
1718
1719 for (i = 0; i < sizeof(net2272_test_packet); ++i)
1720 net2272_write(dev, EP_DATA, net2272_test_packet[i]);
1721
1722 /* Validate test packet */
1723 net2272_write(dev, EP_TRANSFER0, 0);
1724 }
1725 }
1726
1727 static void
1728 net2272_handle_stat0_irqs(struct net2272 *dev, u8 stat)
1729 {
1730 struct net2272_ep *ep;
1731 u8 num, scratch;
1732
1733 /* starting a control request? */
1734 if (unlikely(stat & (1 << SETUP_PACKET_INTERRUPT))) {
1735 union {
1736 u8 raw[8];
1737 struct usb_ctrlrequest r;
1738 } u;
1739 int tmp = 0;
1740 struct net2272_request *req;
1741
1742 if (dev->gadget.speed == USB_SPEED_UNKNOWN) {
1743 if (net2272_read(dev, USBCTL1) & (1 << USB_HIGH_SPEED))
1744 dev->gadget.speed = USB_SPEED_HIGH;
1745 else
1746 dev->gadget.speed = USB_SPEED_FULL;
1747 dev_dbg(dev->dev, "%s\n",
1748 usb_speed_string(dev->gadget.speed));
1749 }
1750
1751 ep = &dev->ep[0];
1752 ep->irqs++;
1753
1754 /* make sure any leftover interrupt state is cleared */
1755 stat &= ~(1 << ENDPOINT_0_INTERRUPT);
1756 while (!list_empty(&ep->queue)) {
1757 req = list_entry(ep->queue.next,
1758 struct net2272_request, queue);
1759 net2272_done(ep, req,
1760 (req->req.actual == req->req.length) ? 0 : -EPROTO);
1761 }
1762 ep->stopped = 0;
1763 dev->protocol_stall = 0;
1764 net2272_ep_write(ep, EP_STAT0,
1765 (1 << DATA_IN_TOKEN_INTERRUPT)
1766 | (1 << DATA_OUT_TOKEN_INTERRUPT)
1767 | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)
1768 | (1 << DATA_PACKET_RECEIVED_INTERRUPT)
1769 | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT));
1770 net2272_ep_write(ep, EP_STAT1,
1771 (1 << TIMEOUT)
1772 | (1 << USB_OUT_ACK_SENT)
1773 | (1 << USB_OUT_NAK_SENT)
1774 | (1 << USB_IN_ACK_RCVD)
1775 | (1 << USB_IN_NAK_SENT)
1776 | (1 << USB_STALL_SENT)
1777 | (1 << LOCAL_OUT_ZLP));
1778
1779 /*
1780 * Ensure Control Read pre-validation setting is beyond maximum size
1781 * - Control Writes can leave non-zero values in EP_TRANSFER. If
1782 * an EP0 transfer following the Control Write is a Control Read,
1783 * the NET2272 sees the non-zero EP_TRANSFER as an unexpected
1784 * pre-validation count.
1785 * - Setting EP_TRANSFER beyond the maximum EP0 transfer size ensures
1786 * the pre-validation count cannot cause an unexpected validatation
1787 */
1788 net2272_write(dev, PAGESEL, 0);
1789 net2272_write(dev, EP_TRANSFER2, 0xff);
1790 net2272_write(dev, EP_TRANSFER1, 0xff);
1791 net2272_write(dev, EP_TRANSFER0, 0xff);
1792
1793 u.raw[0] = net2272_read(dev, SETUP0);
1794 u.raw[1] = net2272_read(dev, SETUP1);
1795 u.raw[2] = net2272_read(dev, SETUP2);
1796 u.raw[3] = net2272_read(dev, SETUP3);
1797 u.raw[4] = net2272_read(dev, SETUP4);
1798 u.raw[5] = net2272_read(dev, SETUP5);
1799 u.raw[6] = net2272_read(dev, SETUP6);
1800 u.raw[7] = net2272_read(dev, SETUP7);
1801 /*
1802 * If you have a big endian cpu make sure le16_to_cpus
1803 * performs the proper byte swapping here...
1804 */
1805 le16_to_cpus(&u.r.wValue);
1806 le16_to_cpus(&u.r.wIndex);
1807 le16_to_cpus(&u.r.wLength);
1808
1809 /* ack the irq */
1810 net2272_write(dev, IRQSTAT0, 1 << SETUP_PACKET_INTERRUPT);
1811 stat ^= (1 << SETUP_PACKET_INTERRUPT);
1812
1813 /* watch control traffic at the token level, and force
1814 * synchronization before letting the status phase happen.
1815 */
1816 ep->is_in = (u.r.bRequestType & USB_DIR_IN) != 0;
1817 if (ep->is_in) {
1818 scratch = (1 << DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE)
1819 | (1 << DATA_OUT_TOKEN_INTERRUPT_ENABLE)
1820 | (1 << DATA_IN_TOKEN_INTERRUPT_ENABLE);
1821 stop_out_naking(ep);
1822 } else
1823 scratch = (1 << DATA_PACKET_RECEIVED_INTERRUPT_ENABLE)
1824 | (1 << DATA_OUT_TOKEN_INTERRUPT_ENABLE)
1825 | (1 << DATA_IN_TOKEN_INTERRUPT_ENABLE);
1826 net2272_ep_write(ep, EP_IRQENB, scratch);
1827
1828 if ((u.r.bRequestType & USB_TYPE_MASK) != USB_TYPE_STANDARD)
1829 goto delegate;
1830 switch (u.r.bRequest) {
1831 case USB_REQ_GET_STATUS: {
1832 struct net2272_ep *e;
1833 u16 status = 0;
1834
1835 switch (u.r.bRequestType & USB_RECIP_MASK) {
1836 case USB_RECIP_ENDPOINT:
1837 e = net2272_get_ep_by_addr(dev, u.r.wIndex);
1838 if (!e || u.r.wLength > 2)
1839 goto do_stall;
1840 if (net2272_ep_read(e, EP_RSPSET) & (1 << ENDPOINT_HALT))
1841 status = __constant_cpu_to_le16(1);
1842 else
1843 status = __constant_cpu_to_le16(0);
1844
1845 /* don't bother with a request object! */
1846 net2272_ep_write(&dev->ep[0], EP_IRQENB, 0);
1847 writew(status, net2272_reg_addr(dev, EP_DATA));
1848 set_fifo_bytecount(&dev->ep[0], 0);
1849 allow_status(ep);
1850 dev_vdbg(dev->dev, "%s stat %02x\n",
1851 ep->ep.name, status);
1852 goto next_endpoints;
1853 case USB_RECIP_DEVICE:
1854 if (u.r.wLength > 2)
1855 goto do_stall;
1856 if (dev->is_selfpowered)
1857 status = (1 << USB_DEVICE_SELF_POWERED);
1858
1859 /* don't bother with a request object! */
1860 net2272_ep_write(&dev->ep[0], EP_IRQENB, 0);
1861 writew(status, net2272_reg_addr(dev, EP_DATA));
1862 set_fifo_bytecount(&dev->ep[0], 0);
1863 allow_status(ep);
1864 dev_vdbg(dev->dev, "device stat %02x\n", status);
1865 goto next_endpoints;
1866 case USB_RECIP_INTERFACE:
1867 if (u.r.wLength > 2)
1868 goto do_stall;
1869
1870 /* don't bother with a request object! */
1871 net2272_ep_write(&dev->ep[0], EP_IRQENB, 0);
1872 writew(status, net2272_reg_addr(dev, EP_DATA));
1873 set_fifo_bytecount(&dev->ep[0], 0);
1874 allow_status(ep);
1875 dev_vdbg(dev->dev, "interface status %02x\n", status);
1876 goto next_endpoints;
1877 }
1878
1879 break;
1880 }
1881 case USB_REQ_CLEAR_FEATURE: {
1882 struct net2272_ep *e;
1883
1884 if (u.r.bRequestType != USB_RECIP_ENDPOINT)
1885 goto delegate;
1886 if (u.r.wValue != USB_ENDPOINT_HALT ||
1887 u.r.wLength != 0)
1888 goto do_stall;
1889 e = net2272_get_ep_by_addr(dev, u.r.wIndex);
1890 if (!e)
1891 goto do_stall;
1892 if (e->wedged) {
1893 dev_vdbg(dev->dev, "%s wedged, halt not cleared\n",
1894 ep->ep.name);
1895 } else {
1896 dev_vdbg(dev->dev, "%s clear halt\n", ep->ep.name);
1897 clear_halt(e);
1898 }
1899 allow_status(ep);
1900 goto next_endpoints;
1901 }
1902 case USB_REQ_SET_FEATURE: {
1903 struct net2272_ep *e;
1904
1905 if (u.r.bRequestType == USB_RECIP_DEVICE) {
1906 if (u.r.wIndex != NORMAL_OPERATION)
1907 net2272_set_test_mode(dev, (u.r.wIndex >> 8));
1908 allow_status(ep);
1909 dev_vdbg(dev->dev, "test mode: %d\n", u.r.wIndex);
1910 goto next_endpoints;
1911 } else if (u.r.bRequestType != USB_RECIP_ENDPOINT)
1912 goto delegate;
1913 if (u.r.wValue != USB_ENDPOINT_HALT ||
1914 u.r.wLength != 0)
1915 goto do_stall;
1916 e = net2272_get_ep_by_addr(dev, u.r.wIndex);
1917 if (!e)
1918 goto do_stall;
1919 set_halt(e);
1920 allow_status(ep);
1921 dev_vdbg(dev->dev, "%s set halt\n", ep->ep.name);
1922 goto next_endpoints;
1923 }
1924 case USB_REQ_SET_ADDRESS: {
1925 net2272_write(dev, OURADDR, u.r.wValue & 0xff);
1926 allow_status(ep);
1927 break;
1928 }
1929 default:
1930 delegate:
1931 dev_vdbg(dev->dev, "setup %02x.%02x v%04x i%04x "
1932 "ep_cfg %08x\n",
1933 u.r.bRequestType, u.r.bRequest,
1934 u.r.wValue, u.r.wIndex,
1935 net2272_ep_read(ep, EP_CFG));
1936 spin_unlock(&dev->lock);
1937 tmp = dev->driver->setup(&dev->gadget, &u.r);
1938 spin_lock(&dev->lock);
1939 }
1940
1941 /* stall ep0 on error */
1942 if (tmp < 0) {
1943 do_stall:
1944 dev_vdbg(dev->dev, "req %02x.%02x protocol STALL; stat %d\n",
1945 u.r.bRequestType, u.r.bRequest, tmp);
1946 dev->protocol_stall = 1;
1947 }
1948 /* endpoint dma irq? */
1949 } else if (stat & (1 << DMA_DONE_INTERRUPT)) {
1950 net2272_cancel_dma(dev);
1951 net2272_write(dev, IRQSTAT0, 1 << DMA_DONE_INTERRUPT);
1952 stat &= ~(1 << DMA_DONE_INTERRUPT);
1953 num = (net2272_read(dev, DMAREQ) & (1 << DMA_ENDPOINT_SELECT))
1954 ? 2 : 1;
1955
1956 ep = &dev->ep[num];
1957 net2272_handle_dma(ep);
1958 }
1959
1960 next_endpoints:
1961 /* endpoint data irq? */
1962 scratch = stat & 0x0f;
1963 stat &= ~0x0f;
1964 for (num = 0; scratch; num++) {
1965 u8 t;
1966
1967 /* does this endpoint's FIFO and queue need tending? */
1968 t = 1 << num;
1969 if ((scratch & t) == 0)
1970 continue;
1971 scratch ^= t;
1972
1973 ep = &dev->ep[num];
1974 net2272_handle_ep(ep);
1975 }
1976
1977 /* some interrupts we can just ignore */
1978 stat &= ~(1 << SOF_INTERRUPT);
1979
1980 if (stat)
1981 dev_dbg(dev->dev, "unhandled irqstat0 %02x\n", stat);
1982 }
1983
1984 static void
1985 net2272_handle_stat1_irqs(struct net2272 *dev, u8 stat)
1986 {
1987 u8 tmp, mask;
1988
1989 /* after disconnect there's nothing else to do! */
1990 tmp = (1 << VBUS_INTERRUPT) | (1 << ROOT_PORT_RESET_INTERRUPT);
1991 mask = (1 << USB_HIGH_SPEED) | (1 << USB_FULL_SPEED);
1992
1993 if (stat & tmp) {
1994 net2272_write(dev, IRQSTAT1, tmp);
1995 if ((((stat & (1 << ROOT_PORT_RESET_INTERRUPT)) &&
1996 ((net2272_read(dev, USBCTL1) & mask) == 0))
1997 || ((net2272_read(dev, USBCTL1) & (1 << VBUS_PIN))
1998 == 0))
1999 && (dev->gadget.speed != USB_SPEED_UNKNOWN)) {
2000 dev_dbg(dev->dev, "disconnect %s\n",
2001 dev->driver->driver.name);
2002 stop_activity(dev, dev->driver);
2003 net2272_ep0_start(dev);
2004 return;
2005 }
2006 stat &= ~tmp;
2007
2008 if (!stat)
2009 return;
2010 }
2011
2012 tmp = (1 << SUSPEND_REQUEST_CHANGE_INTERRUPT);
2013 if (stat & tmp) {
2014 net2272_write(dev, IRQSTAT1, tmp);
2015 if (stat & (1 << SUSPEND_REQUEST_INTERRUPT)) {
2016 if (dev->driver->suspend)
2017 dev->driver->suspend(&dev->gadget);
2018 if (!enable_suspend) {
2019 stat &= ~(1 << SUSPEND_REQUEST_INTERRUPT);
2020 dev_dbg(dev->dev, "Suspend disabled, ignoring\n");
2021 }
2022 } else {
2023 if (dev->driver->resume)
2024 dev->driver->resume(&dev->gadget);
2025 }
2026 stat &= ~tmp;
2027 }
2028
2029 /* clear any other status/irqs */
2030 if (stat)
2031 net2272_write(dev, IRQSTAT1, stat);
2032
2033 /* some status we can just ignore */
2034 stat &= ~((1 << CONTROL_STATUS_INTERRUPT)
2035 | (1 << SUSPEND_REQUEST_INTERRUPT)
2036 | (1 << RESUME_INTERRUPT));
2037 if (!stat)
2038 return;
2039 else
2040 dev_dbg(dev->dev, "unhandled irqstat1 %02x\n", stat);
2041 }
2042
2043 static irqreturn_t net2272_irq(int irq, void *_dev)
2044 {
2045 struct net2272 *dev = _dev;
2046 #if defined(PLX_PCI_RDK) || defined(PLX_PCI_RDK2)
2047 u32 intcsr;
2048 #endif
2049 #if defined(PLX_PCI_RDK)
2050 u8 dmareq;
2051 #endif
2052 spin_lock(&dev->lock);
2053 #if defined(PLX_PCI_RDK)
2054 intcsr = readl(dev->rdk1.plx9054_base_addr + INTCSR);
2055
2056 if ((intcsr & LOCAL_INTERRUPT_TEST) == LOCAL_INTERRUPT_TEST) {
2057 writel(intcsr & ~(1 << PCI_INTERRUPT_ENABLE),
2058 dev->rdk1.plx9054_base_addr + INTCSR);
2059 net2272_handle_stat1_irqs(dev, net2272_read(dev, IRQSTAT1));
2060 net2272_handle_stat0_irqs(dev, net2272_read(dev, IRQSTAT0));
2061 intcsr = readl(dev->rdk1.plx9054_base_addr + INTCSR);
2062 writel(intcsr | (1 << PCI_INTERRUPT_ENABLE),
2063 dev->rdk1.plx9054_base_addr + INTCSR);
2064 }
2065 if ((intcsr & DMA_CHANNEL_0_TEST) == DMA_CHANNEL_0_TEST) {
2066 writeb((1 << CHANNEL_CLEAR_INTERRUPT | (0 << CHANNEL_ENABLE)),
2067 dev->rdk1.plx9054_base_addr + DMACSR0);
2068
2069 dmareq = net2272_read(dev, DMAREQ);
2070 if (dmareq & 0x01)
2071 net2272_handle_dma(&dev->ep[2]);
2072 else
2073 net2272_handle_dma(&dev->ep[1]);
2074 }
2075 #endif
2076 #if defined(PLX_PCI_RDK2)
2077 /* see if PCI int for us by checking irqstat */
2078 intcsr = readl(dev->rdk2.fpga_base_addr + RDK2_IRQSTAT);
2079 if (!intcsr & (1 << NET2272_PCI_IRQ)) {
2080 spin_unlock(&dev->lock);
2081 return IRQ_NONE;
2082 }
2083 /* check dma interrupts */
2084 #endif
2085 /* Platform/devcice interrupt handler */
2086 #if !defined(PLX_PCI_RDK)
2087 net2272_handle_stat1_irqs(dev, net2272_read(dev, IRQSTAT1));
2088 net2272_handle_stat0_irqs(dev, net2272_read(dev, IRQSTAT0));
2089 #endif
2090 spin_unlock(&dev->lock);
2091
2092 return IRQ_HANDLED;
2093 }
2094
2095 static int net2272_present(struct net2272 *dev)
2096 {
2097 /*
2098 * Quick test to see if CPU can communicate properly with the NET2272.
2099 * Verifies connection using writes and reads to write/read and
2100 * read-only registers.
2101 *
2102 * This routine is strongly recommended especially during early bring-up
2103 * of new hardware, however for designs that do not apply Power On System
2104 * Tests (POST) it may discarded (or perhaps minimized).
2105 */
2106 unsigned int ii;
2107 u8 val, refval;
2108
2109 /* Verify NET2272 write/read SCRATCH register can write and read */
2110 refval = net2272_read(dev, SCRATCH);
2111 for (ii = 0; ii < 0x100; ii += 7) {
2112 net2272_write(dev, SCRATCH, ii);
2113 val = net2272_read(dev, SCRATCH);
2114 if (val != ii) {
2115 dev_dbg(dev->dev,
2116 "%s: write/read SCRATCH register test failed: "
2117 "wrote:0x%2.2x, read:0x%2.2x\n",
2118 __func__, ii, val);
2119 return -EINVAL;
2120 }
2121 }
2122 /* To be nice, we write the original SCRATCH value back: */
2123 net2272_write(dev, SCRATCH, refval);
2124
2125 /* Verify NET2272 CHIPREV register is read-only: */
2126 refval = net2272_read(dev, CHIPREV_2272);
2127 for (ii = 0; ii < 0x100; ii += 7) {
2128 net2272_write(dev, CHIPREV_2272, ii);
2129 val = net2272_read(dev, CHIPREV_2272);
2130 if (val != refval) {
2131 dev_dbg(dev->dev,
2132 "%s: write/read CHIPREV register test failed: "
2133 "wrote 0x%2.2x, read:0x%2.2x expected:0x%2.2x\n",
2134 __func__, ii, val, refval);
2135 return -EINVAL;
2136 }
2137 }
2138
2139 /*
2140 * Verify NET2272's "NET2270 legacy revision" register
2141 * - NET2272 has two revision registers. The NET2270 legacy revision
2142 * register should read the same value, regardless of the NET2272
2143 * silicon revision. The legacy register applies to NET2270
2144 * firmware being applied to the NET2272.
2145 */
2146 val = net2272_read(dev, CHIPREV_LEGACY);
2147 if (val != NET2270_LEGACY_REV) {
2148 /*
2149 * Unexpected legacy revision value
2150 * - Perhaps the chip is a NET2270?
2151 */
2152 dev_dbg(dev->dev,
2153 "%s: WARNING: UNEXPECTED NET2272 LEGACY REGISTER VALUE:\n"
2154 " - CHIPREV_LEGACY: expected 0x%2.2x, got:0x%2.2x. (Not NET2272?)\n",
2155 __func__, NET2270_LEGACY_REV, val);
2156 return -EINVAL;
2157 }
2158
2159 /*
2160 * Verify NET2272 silicon revision
2161 * - This revision register is appropriate for the silicon version
2162 * of the NET2272
2163 */
2164 val = net2272_read(dev, CHIPREV_2272);
2165 switch (val) {
2166 case CHIPREV_NET2272_R1:
2167 /*
2168 * NET2272 Rev 1 has DMA related errata:
2169 * - Newer silicon (Rev 1A or better) required
2170 */
2171 dev_dbg(dev->dev,
2172 "%s: Rev 1 detected: newer silicon recommended for DMA support\n",
2173 __func__);
2174 break;
2175 case CHIPREV_NET2272_R1A:
2176 break;
2177 default:
2178 /* NET2272 silicon version *may* not work with this firmware */
2179 dev_dbg(dev->dev,
2180 "%s: unexpected silicon revision register value: "
2181 " CHIPREV_2272: 0x%2.2x\n",
2182 __func__, val);
2183 /*
2184 * Return Success, even though the chip rev is not an expected value
2185 * - Older, pre-built firmware can attempt to operate on newer silicon
2186 * - Often, new silicon is perfectly compatible
2187 */
2188 }
2189
2190 /* Success: NET2272 checks out OK */
2191 return 0;
2192 }
2193
2194 static void
2195 net2272_gadget_release(struct device *_dev)
2196 {
2197 struct net2272 *dev = dev_get_drvdata(_dev);
2198 kfree(dev);
2199 }
2200
2201 /*---------------------------------------------------------------------------*/
2202
2203 static void
2204 net2272_remove(struct net2272 *dev)
2205 {
2206 usb_del_gadget_udc(&dev->gadget);
2207
2208 /* start with the driver above us */
2209 if (dev->driver) {
2210 /* should have been done already by driver model core */
2211 dev_warn(dev->dev, "pci remove, driver '%s' is still registered\n",
2212 dev->driver->driver.name);
2213 usb_gadget_unregister_driver(dev->driver);
2214 }
2215
2216 free_irq(dev->irq, dev);
2217 iounmap(dev->base_addr);
2218
2219 device_unregister(&dev->gadget.dev);
2220 device_remove_file(dev->dev, &dev_attr_registers);
2221
2222 dev_info(dev->dev, "unbind\n");
2223 }
2224
2225 static struct net2272 *net2272_probe_init(struct device *dev, unsigned int irq)
2226 {
2227 struct net2272 *ret;
2228
2229 if (!irq) {
2230 dev_dbg(dev, "No IRQ!\n");
2231 return ERR_PTR(-ENODEV);
2232 }
2233
2234 /* alloc, and start init */
2235 ret = kzalloc(sizeof(*ret), GFP_KERNEL);
2236 if (!ret)
2237 return ERR_PTR(-ENOMEM);
2238
2239 spin_lock_init(&ret->lock);
2240 ret->irq = irq;
2241 ret->dev = dev;
2242 ret->gadget.ops = &net2272_ops;
2243 ret->gadget.max_speed = USB_SPEED_HIGH;
2244
2245 /* the "gadget" abstracts/virtualizes the controller */
2246 dev_set_name(&ret->gadget.dev, "gadget");
2247 ret->gadget.dev.parent = dev;
2248 ret->gadget.dev.dma_mask = dev->dma_mask;
2249 ret->gadget.dev.release = net2272_gadget_release;
2250 ret->gadget.name = driver_name;
2251
2252 return ret;
2253 }
2254
2255 static int
2256 net2272_probe_fin(struct net2272 *dev, unsigned int irqflags)
2257 {
2258 int ret;
2259
2260 /* See if there... */
2261 if (net2272_present(dev)) {
2262 dev_warn(dev->dev, "2272 not found!\n");
2263 ret = -ENODEV;
2264 goto err;
2265 }
2266
2267 net2272_usb_reset(dev);
2268 net2272_usb_reinit(dev);
2269
2270 ret = request_irq(dev->irq, net2272_irq, irqflags, driver_name, dev);
2271 if (ret) {
2272 dev_err(dev->dev, "request interrupt %i failed\n", dev->irq);
2273 goto err;
2274 }
2275
2276 dev->chiprev = net2272_read(dev, CHIPREV_2272);
2277
2278 /* done */
2279 dev_info(dev->dev, "%s\n", driver_desc);
2280 dev_info(dev->dev, "irq %i, mem %p, chip rev %04x, dma %s\n",
2281 dev->irq, dev->base_addr, dev->chiprev,
2282 dma_mode_string());
2283 dev_info(dev->dev, "version: %s\n", driver_vers);
2284
2285 ret = device_register(&dev->gadget.dev);
2286 if (ret)
2287 goto err_irq;
2288 ret = device_create_file(dev->dev, &dev_attr_registers);
2289 if (ret)
2290 goto err_dev_reg;
2291
2292 ret = usb_add_gadget_udc(dev->dev, &dev->gadget);
2293 if (ret)
2294 goto err_add_udc;
2295
2296 return 0;
2297
2298 err_add_udc:
2299 device_remove_file(dev->dev, &dev_attr_registers);
2300 err_dev_reg:
2301 device_unregister(&dev->gadget.dev);
2302 err_irq:
2303 free_irq(dev->irq, dev);
2304 err:
2305 return ret;
2306 }
2307
2308 #ifdef CONFIG_PCI
2309
2310 /*
2311 * wrap this driver around the specified device, but
2312 * don't respond over USB until a gadget driver binds to us
2313 */
2314
2315 static int
2316 net2272_rdk1_probe(struct pci_dev *pdev, struct net2272 *dev)
2317 {
2318 unsigned long resource, len, tmp;
2319 void __iomem *mem_mapped_addr[4];
2320 int ret, i;
2321
2322 /*
2323 * BAR 0 holds PLX 9054 config registers
2324 * BAR 1 is i/o memory; unused here
2325 * BAR 2 holds EPLD config registers
2326 * BAR 3 holds NET2272 registers
2327 */
2328
2329 /* Find and map all address spaces */
2330 for (i = 0; i < 4; ++i) {
2331 if (i == 1)
2332 continue; /* BAR1 unused */
2333
2334 resource = pci_resource_start(pdev, i);
2335 len = pci_resource_len(pdev, i);
2336
2337 if (!request_mem_region(resource, len, driver_name)) {
2338 dev_dbg(dev->dev, "controller already in use\n");
2339 ret = -EBUSY;
2340 goto err;
2341 }
2342
2343 mem_mapped_addr[i] = ioremap_nocache(resource, len);
2344 if (mem_mapped_addr[i] == NULL) {
2345 release_mem_region(resource, len);
2346 dev_dbg(dev->dev, "can't map memory\n");
2347 ret = -EFAULT;
2348 goto err;
2349 }
2350 }
2351
2352 dev->rdk1.plx9054_base_addr = mem_mapped_addr[0];
2353 dev->rdk1.epld_base_addr = mem_mapped_addr[2];
2354 dev->base_addr = mem_mapped_addr[3];
2355
2356 /* Set PLX 9054 bus width (16 bits) */
2357 tmp = readl(dev->rdk1.plx9054_base_addr + LBRD1);
2358 writel((tmp & ~(3 << MEMORY_SPACE_LOCAL_BUS_WIDTH)) | W16_BIT,
2359 dev->rdk1.plx9054_base_addr + LBRD1);
2360
2361 /* Enable PLX 9054 Interrupts */
2362 writel(readl(dev->rdk1.plx9054_base_addr + INTCSR) |
2363 (1 << PCI_INTERRUPT_ENABLE) |
2364 (1 << LOCAL_INTERRUPT_INPUT_ENABLE),
2365 dev->rdk1.plx9054_base_addr + INTCSR);
2366
2367 writeb((1 << CHANNEL_CLEAR_INTERRUPT | (0 << CHANNEL_ENABLE)),
2368 dev->rdk1.plx9054_base_addr + DMACSR0);
2369
2370 /* reset */
2371 writeb((1 << EPLD_DMA_ENABLE) |
2372 (1 << DMA_CTL_DACK) |
2373 (1 << DMA_TIMEOUT_ENABLE) |
2374 (1 << USER) |
2375 (0 << MPX_MODE) |
2376 (1 << BUSWIDTH) |
2377 (1 << NET2272_RESET),
2378 dev->base_addr + EPLD_IO_CONTROL_REGISTER);
2379
2380 mb();
2381 writeb(readb(dev->base_addr + EPLD_IO_CONTROL_REGISTER) &
2382 ~(1 << NET2272_RESET),
2383 dev->base_addr + EPLD_IO_CONTROL_REGISTER);
2384 udelay(200);
2385
2386 return 0;
2387
2388 err:
2389 while (--i >= 0) {
2390 iounmap(mem_mapped_addr[i]);
2391 release_mem_region(pci_resource_start(pdev, i),
2392 pci_resource_len(pdev, i));
2393 }
2394
2395 return ret;
2396 }
2397
2398 static int
2399 net2272_rdk2_probe(struct pci_dev *pdev, struct net2272 *dev)
2400 {
2401 unsigned long resource, len;
2402 void __iomem *mem_mapped_addr[2];
2403 int ret, i;
2404
2405 /*
2406 * BAR 0 holds FGPA config registers
2407 * BAR 1 holds NET2272 registers
2408 */
2409
2410 /* Find and map all address spaces, bar2-3 unused in rdk 2 */
2411 for (i = 0; i < 2; ++i) {
2412 resource = pci_resource_start(pdev, i);
2413 len = pci_resource_len(pdev, i);
2414
2415 if (!request_mem_region(resource, len, driver_name)) {
2416 dev_dbg(dev->dev, "controller already in use\n");
2417 ret = -EBUSY;
2418 goto err;
2419 }
2420
2421 mem_mapped_addr[i] = ioremap_nocache(resource, len);
2422 if (mem_mapped_addr[i] == NULL) {
2423 release_mem_region(resource, len);
2424 dev_dbg(dev->dev, "can't map memory\n");
2425 ret = -EFAULT;
2426 goto err;
2427 }
2428 }
2429
2430 dev->rdk2.fpga_base_addr = mem_mapped_addr[0];
2431 dev->base_addr = mem_mapped_addr[1];
2432
2433 mb();
2434 /* Set 2272 bus width (16 bits) and reset */
2435 writel((1 << CHIP_RESET), dev->rdk2.fpga_base_addr + RDK2_LOCCTLRDK);
2436 udelay(200);
2437 writel((1 << BUS_WIDTH), dev->rdk2.fpga_base_addr + RDK2_LOCCTLRDK);
2438 /* Print fpga version number */
2439 dev_info(dev->dev, "RDK2 FPGA version %08x\n",
2440 readl(dev->rdk2.fpga_base_addr + RDK2_FPGAREV));
2441 /* Enable FPGA Interrupts */
2442 writel((1 << NET2272_PCI_IRQ), dev->rdk2.fpga_base_addr + RDK2_IRQENB);
2443
2444 return 0;
2445
2446 err:
2447 while (--i >= 0) {
2448 iounmap(mem_mapped_addr[i]);
2449 release_mem_region(pci_resource_start(pdev, i),
2450 pci_resource_len(pdev, i));
2451 }
2452
2453 return ret;
2454 }
2455
2456 static int
2457 net2272_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2458 {
2459 struct net2272 *dev;
2460 int ret;
2461
2462 dev = net2272_probe_init(&pdev->dev, pdev->irq);
2463 if (IS_ERR(dev))
2464 return PTR_ERR(dev);
2465 dev->dev_id = pdev->device;
2466
2467 if (pci_enable_device(pdev) < 0) {
2468 ret = -ENODEV;
2469 goto err_free;
2470 }
2471
2472 pci_set_master(pdev);
2473
2474 switch (pdev->device) {
2475 case PCI_DEVICE_ID_RDK1: ret = net2272_rdk1_probe(pdev, dev); break;
2476 case PCI_DEVICE_ID_RDK2: ret = net2272_rdk2_probe(pdev, dev); break;
2477 default: BUG();
2478 }
2479 if (ret)
2480 goto err_pci;
2481
2482 ret = net2272_probe_fin(dev, 0);
2483 if (ret)
2484 goto err_pci;
2485
2486 pci_set_drvdata(pdev, dev);
2487
2488 return 0;
2489
2490 err_pci:
2491 pci_disable_device(pdev);
2492 err_free:
2493 kfree(dev);
2494
2495 return ret;
2496 }
2497
2498 static void
2499 net2272_rdk1_remove(struct pci_dev *pdev, struct net2272 *dev)
2500 {
2501 int i;
2502
2503 /* disable PLX 9054 interrupts */
2504 writel(readl(dev->rdk1.plx9054_base_addr + INTCSR) &
2505 ~(1 << PCI_INTERRUPT_ENABLE),
2506 dev->rdk1.plx9054_base_addr + INTCSR);
2507
2508 /* clean up resources allocated during probe() */
2509 iounmap(dev->rdk1.plx9054_base_addr);
2510 iounmap(dev->rdk1.epld_base_addr);
2511
2512 for (i = 0; i < 4; ++i) {
2513 if (i == 1)
2514 continue; /* BAR1 unused */
2515 release_mem_region(pci_resource_start(pdev, i),
2516 pci_resource_len(pdev, i));
2517 }
2518 }
2519
2520 static void
2521 net2272_rdk2_remove(struct pci_dev *pdev, struct net2272 *dev)
2522 {
2523 int i;
2524
2525 /* disable fpga interrupts
2526 writel(readl(dev->rdk1.plx9054_base_addr + INTCSR) &
2527 ~(1 << PCI_INTERRUPT_ENABLE),
2528 dev->rdk1.plx9054_base_addr + INTCSR);
2529 */
2530
2531 /* clean up resources allocated during probe() */
2532 iounmap(dev->rdk2.fpga_base_addr);
2533
2534 for (i = 0; i < 2; ++i)
2535 release_mem_region(pci_resource_start(pdev, i),
2536 pci_resource_len(pdev, i));
2537 }
2538
2539 static void
2540 net2272_pci_remove(struct pci_dev *pdev)
2541 {
2542 struct net2272 *dev = pci_get_drvdata(pdev);
2543
2544 net2272_remove(dev);
2545
2546 switch (pdev->device) {
2547 case PCI_DEVICE_ID_RDK1: net2272_rdk1_remove(pdev, dev); break;
2548 case PCI_DEVICE_ID_RDK2: net2272_rdk2_remove(pdev, dev); break;
2549 default: BUG();
2550 }
2551
2552 pci_disable_device(pdev);
2553
2554 kfree(dev);
2555 }
2556
2557 /* Table of matching PCI IDs */
2558 static struct pci_device_id pci_ids[] = {
2559 { /* RDK 1 card */
2560 .class = ((PCI_CLASS_BRIDGE_OTHER << 8) | 0xfe),
2561 .class_mask = 0,
2562 .vendor = PCI_VENDOR_ID_PLX,
2563 .device = PCI_DEVICE_ID_RDK1,
2564 .subvendor = PCI_ANY_ID,
2565 .subdevice = PCI_ANY_ID,
2566 },
2567 { /* RDK 2 card */
2568 .class = ((PCI_CLASS_BRIDGE_OTHER << 8) | 0xfe),
2569 .class_mask = 0,
2570 .vendor = PCI_VENDOR_ID_PLX,
2571 .device = PCI_DEVICE_ID_RDK2,
2572 .subvendor = PCI_ANY_ID,
2573 .subdevice = PCI_ANY_ID,
2574 },
2575 { }
2576 };
2577 MODULE_DEVICE_TABLE(pci, pci_ids);
2578
2579 static struct pci_driver net2272_pci_driver = {
2580 .name = driver_name,
2581 .id_table = pci_ids,
2582
2583 .probe = net2272_pci_probe,
2584 .remove = net2272_pci_remove,
2585 };
2586
2587 static int net2272_pci_register(void)
2588 {
2589 return pci_register_driver(&net2272_pci_driver);
2590 }
2591
2592 static void net2272_pci_unregister(void)
2593 {
2594 pci_unregister_driver(&net2272_pci_driver);
2595 }
2596
2597 #else
2598 static inline int net2272_pci_register(void) { return 0; }
2599 static inline void net2272_pci_unregister(void) { }
2600 #endif
2601
2602 /*---------------------------------------------------------------------------*/
2603
2604 static int
2605 net2272_plat_probe(struct platform_device *pdev)
2606 {
2607 struct net2272 *dev;
2608 int ret;
2609 unsigned int irqflags;
2610 resource_size_t base, len;
2611 struct resource *iomem, *iomem_bus, *irq_res;
2612
2613 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
2614 iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2615 iomem_bus = platform_get_resource(pdev, IORESOURCE_BUS, 0);
2616 if (!irq_res || !iomem) {
2617 dev_err(&pdev->dev, "must provide irq/base addr");
2618 return -EINVAL;
2619 }
2620
2621 dev = net2272_probe_init(&pdev->dev, irq_res->start);
2622 if (IS_ERR(dev))
2623 return PTR_ERR(dev);
2624
2625 irqflags = 0;
2626 if (irq_res->flags & IORESOURCE_IRQ_HIGHEDGE)
2627 irqflags |= IRQF_TRIGGER_RISING;
2628 if (irq_res->flags & IORESOURCE_IRQ_LOWEDGE)
2629 irqflags |= IRQF_TRIGGER_FALLING;
2630 if (irq_res->flags & IORESOURCE_IRQ_HIGHLEVEL)
2631 irqflags |= IRQF_TRIGGER_HIGH;
2632 if (irq_res->flags & IORESOURCE_IRQ_LOWLEVEL)
2633 irqflags |= IRQF_TRIGGER_LOW;
2634
2635 base = iomem->start;
2636 len = resource_size(iomem);
2637 if (iomem_bus)
2638 dev->base_shift = iomem_bus->start;
2639
2640 if (!request_mem_region(base, len, driver_name)) {
2641 dev_dbg(dev->dev, "get request memory region!\n");
2642 ret = -EBUSY;
2643 goto err;
2644 }
2645 dev->base_addr = ioremap_nocache(base, len);
2646 if (!dev->base_addr) {
2647 dev_dbg(dev->dev, "can't map memory\n");
2648 ret = -EFAULT;
2649 goto err_req;
2650 }
2651
2652 ret = net2272_probe_fin(dev, IRQF_TRIGGER_LOW);
2653 if (ret)
2654 goto err_io;
2655
2656 platform_set_drvdata(pdev, dev);
2657 dev_info(&pdev->dev, "running in 16-bit, %sbyte swap local bus mode\n",
2658 (net2272_read(dev, LOCCTL) & (1 << BYTE_SWAP)) ? "" : "no ");
2659
2660 return 0;
2661
2662 err_io:
2663 iounmap(dev->base_addr);
2664 err_req:
2665 release_mem_region(base, len);
2666 err:
2667 return ret;
2668 }
2669
2670 static int
2671 net2272_plat_remove(struct platform_device *pdev)
2672 {
2673 struct net2272 *dev = platform_get_drvdata(pdev);
2674
2675 net2272_remove(dev);
2676
2677 release_mem_region(pdev->resource[0].start,
2678 resource_size(&pdev->resource[0]));
2679
2680 kfree(dev);
2681
2682 return 0;
2683 }
2684
2685 static struct platform_driver net2272_plat_driver = {
2686 .probe = net2272_plat_probe,
2687 .remove = net2272_plat_remove,
2688 .driver = {
2689 .name = driver_name,
2690 .owner = THIS_MODULE,
2691 },
2692 /* FIXME .suspend, .resume */
2693 };
2694 MODULE_ALIAS("platform:net2272");
2695
2696 static int __init net2272_init(void)
2697 {
2698 int ret;
2699
2700 ret = net2272_pci_register();
2701 if (ret)
2702 return ret;
2703 ret = platform_driver_register(&net2272_plat_driver);
2704 if (ret)
2705 goto err_pci;
2706 return ret;
2707
2708 err_pci:
2709 net2272_pci_unregister();
2710 return ret;
2711 }
2712 module_init(net2272_init);
2713
2714 static void __exit net2272_cleanup(void)
2715 {
2716 net2272_pci_unregister();
2717 platform_driver_unregister(&net2272_plat_driver);
2718 }
2719 module_exit(net2272_cleanup);
2720
2721 MODULE_DESCRIPTION(DRIVER_DESC);
2722 MODULE_AUTHOR("PLX Technology, Inc.");
2723 MODULE_LICENSE("GPL");
kernel source for telekom puls (alcatel/mediatek)