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usb: remove use of __devexit
[linux-2.6-block.git] / drivers / usb / gadget / net2272.c
CommitLineData
ceb80363
SL		 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>
ceb80363
SL		 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>
d84d6615 36#include <linux/prefetch.h>
ceb80363
SL		 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>
ceb80363
SL		 45#include <asm/unaligned.h>
46
47#include "net2272.h"
48
49#define DRIVER_DESC "PLX NET2272 USB Peripheral Controller"
50
51static const char driver_name[] = "net2272";
52static const char driver_vers[] = "2006 October 17/mainline";
53static const char driver_desc[] = DRIVER_DESC;
54
55static const char ep0name[] = "ep0";
56static 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_GADGET_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 */
90ab5ee9 71static bool use_dma = 0;
ceb80363
SL		 72module_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 */
85static ushort dma_ep = 1;
86module_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 */
94static ushort dma_mode = 2;
95module_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 */
109static ushort fifo_mode = 0;
110module_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 */
118static ushort enable_suspend = 0;
119module_param(enable_suspend, ushort, 0644);
120
121static 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
138static 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
148static 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
158static 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
169static 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
181static void net2272_dequeue_all(struct net2272_ep *);
182static int net2272_kick_dma(struct net2272_ep *, struct net2272_request *);
183static int net2272_fifo_status(struct usb_ep *);
184
185static struct usb_ep_ops net2272_ep_ops;
186
187/*---------------------------------------------------------------------------*/
188
189static int
190net2272_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
29cc8897 206 max = usb_endpoint_maxp(desc) & 0x1fff;
ceb80363
SL		 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
263static 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
309static 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
330static struct usb_request *
331net2272_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
350static void
351net2272_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
365static void
366net2272_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;
af93f2c7
FB		 387 if (use_dma && ep->dma)
388 usb_gadget_unmap_request(&dev->gadget, &req->req,
389 ep->is_in);
ceb80363
SL		 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
404static int
405net2272_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 */
441static int
442net2272_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
502static void
503net2272_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
512static int
513net2272_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
554static int
555net2272_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
629static void
630net2272_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 */
642static int
643net2272_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
706static void
707net2272_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 */
721static int
722net2272_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
7b30d19a
FB		 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);
ceb80363
SL		 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
804static 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
827static int
828net2272_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 */
af93f2c7
FB		 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;
ceb80363
SL		 854 }
855
7b30d19a 856 dev_vdbg(dev->dev, "%s queue req %p, len %d buf %p dma %08llx %s\n",
ceb80363 857 _ep->name, _req, _req->length, _req->buf,
7b30d19a 858 (unsigned long long) _req->dma, _req->zero ? "zero" : "!zero");
ceb80363
SL		 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 */
928static void
929net2272_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 */
945static int
946net2272_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
985static int
986net2272_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
1027static int
1028net2272_set_halt(struct usb_ep *_ep, int value)
1029{
1030 return net2272_set_halt_and_wedge(_ep, value, 0);
1031}
1032
1033static int
1034net2272_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
1041static int
1042net2272_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
1062static void
1063net2272_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
1076static 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
1094static int
1095net2272_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
1113static int
1114net2272_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
1134static int
1135net2272_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
1148static int
1149net2272_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
96f8db6a
FB		 1172static int net2272_start(struct usb_gadget *_gadget,
1173 struct usb_gadget_driver *driver);
1174static int net2272_stop(struct usb_gadget *_gadget,
1175 struct usb_gadget_driver *driver);
0f91349b 1176
ceb80363 1177static const struct usb_gadget_ops net2272_ops = {
96f8db6a
FB		 1178 .get_frame = net2272_get_frame,
1179 .wakeup = net2272_wakeup,
ceb80363 1180 .set_selfpowered = net2272_set_selfpowered,
96f8db6a
FB		 1181 .pullup = net2272_pullup,
1182 .udc_start = net2272_start,
1183 .udc_stop = net2272_stop,
ceb80363
SL		 1184};
1185
1186/*---------------------------------------------------------------------------*/
1187
1188static ssize_t
1189net2272_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}
1313static DEVICE_ATTR(registers, S_IRUGO, net2272_show_registers, NULL);
1314
1315/*---------------------------------------------------------------------------*/
1316
1317static void
1318net2272_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
ceb80363
SL		 1357static void
1358net2272_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
1391static void
1392net2272_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
1421static void
1422net2272_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 */
96f8db6a
FB		 1452static int net2272_start(struct usb_gadget *_gadget,
1453 struct usb_gadget_driver *driver)
ceb80363 1454{
96f8db6a 1455 struct net2272 *dev;
ceb80363
SL		 1456 unsigned i;
1457
96f8db6a 1458 if (!driver || !driver->unbind || !driver->setup ||
7177aed4 1459 driver->max_speed != USB_SPEED_HIGH)
ceb80363 1460 return -EINVAL;
96f8db6a
FB		 1461
1462 dev = container_of(_gadget, struct net2272, gadget);
ceb80363
SL		 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;
ceb80363
SL		 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}
ceb80363
SL		 1481
1482static void
1483stop_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
ceb80363
SL		 1498 net2272_usb_reinit(dev);
1499}
1500
96f8db6a
FB		 1501static int net2272_stop(struct usb_gadget *_gadget,
1502 struct usb_gadget_driver *driver)
ceb80363 1503{
96f8db6a 1504 struct net2272 *dev;
ceb80363
SL		 1505 unsigned long flags;
1506
96f8db6a 1507 dev = container_of(_gadget, struct net2272, gadget);
ceb80363
SL		 1508
1509 spin_lock_irqsave(&dev->lock, flags);
1510 stop_activity(dev, driver);
1511 spin_unlock_irqrestore(&dev->lock, flags);
1512
ceb80363
SL		 1513 dev->gadget.dev.driver = NULL;
1514 dev->driver = NULL;
1515
1516 dev_dbg(dev->dev, "unregistered driver '%s'\n", driver->driver.name);
1517 return 0;
1518}
ceb80363
SL		 1519
1520/*---------------------------------------------------------------------------*/
1521/* handle ep-a/ep-b dma completions */
1522static void
1523net2272_handle_dma(struct net2272_ep *ep)
1524{
1525 struct net2272_request *req;
1526 unsigned len;
1527 int status;
1528
1529 if (!list_empty(&ep->queue))
1530 req = list_entry(ep->queue.next,
1531 struct net2272_request, queue);
1532 else
1533 req = NULL;
1534
1535 dev_vdbg(ep->dev->dev, "handle_dma %s req %p\n", ep->ep.name, req);
1536
1537 /* Ensure DREQ is de-asserted */
1538 net2272_write(ep->dev, DMAREQ,
1539 (0 << DMA_BUFFER_VALID)
1540 | (0 << DMA_REQUEST_ENABLE)
1541 | (1 << DMA_CONTROL_DACK)
1542 | (ep->dev->dma_eot_polarity << EOT_POLARITY)
1543 | (ep->dev->dma_dack_polarity << DACK_POLARITY)
1544 | (ep->dev->dma_dreq_polarity << DREQ_POLARITY)
1545 | ((ep->dma >> 1) << DMA_ENDPOINT_SELECT));
1546
1547 ep->dev->dma_busy = 0;
1548
1549 net2272_ep_write(ep, EP_IRQENB,
1550 (1 << DATA_PACKET_RECEIVED_INTERRUPT_ENABLE)
1551 | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE)
1552 | net2272_ep_read(ep, EP_IRQENB));
1553
1554 /* device-to-host transfer completed */
1555 if (ep->is_in) {
1556 /* validate a short packet or zlp if necessary */
1557 if ((req->req.length % ep->ep.maxpacket != 0) ||
1558 req->req.zero)
1559 set_fifo_bytecount(ep, 0);
1560
1561 net2272_done(ep, req, 0);
1562 if (!list_empty(&ep->queue)) {
1563 req = list_entry(ep->queue.next,
1564 struct net2272_request, queue);
1565 status = net2272_kick_dma(ep, req);
1566 if (status < 0)
1567 net2272_pio_advance(ep);
1568 }
1569
1570 /* host-to-device transfer completed */
1571 } else {
1572 /* terminated with a short packet? */
1573 if (net2272_read(ep->dev, IRQSTAT0) &
1574 (1 << DMA_DONE_INTERRUPT)) {
1575 /* abort system dma */
1576 net2272_cancel_dma(ep->dev);
1577 }
1578
1579 /* EP_TRANSFER will contain the number of bytes
1580 * actually received.
1581 * NOTE: There is no overflow detection on EP_TRANSFER:
1582 * We can't deal with transfers larger than 2^24 bytes!
1583 */
1584 len = (net2272_ep_read(ep, EP_TRANSFER2) << 16)
1585 | (net2272_ep_read(ep, EP_TRANSFER1) << 8)
1586 | (net2272_ep_read(ep, EP_TRANSFER0));
1587
1588 if (ep->not_empty)
1589 len += 4;
1590
1591 req->req.actual += len;
1592
1593 /* get any remaining data */
1594 net2272_pio_advance(ep);
1595 }
1596}
1597
1598/*---------------------------------------------------------------------------*/
1599
1600static void
1601net2272_handle_ep(struct net2272_ep *ep)
1602{
1603 struct net2272_request *req;
1604 u8 stat0, stat1;
1605
1606 if (!list_empty(&ep->queue))
1607 req = list_entry(ep->queue.next,
1608 struct net2272_request, queue);
1609 else
1610 req = NULL;
1611
1612 /* ack all, and handle what we care about */
1613 stat0 = net2272_ep_read(ep, EP_STAT0);
1614 stat1 = net2272_ep_read(ep, EP_STAT1);
1615 ep->irqs++;
1616
1617 dev_vdbg(ep->dev->dev, "%s ack ep_stat0 %02x, ep_stat1 %02x, req %p\n",
1618 ep->ep.name, stat0, stat1, req ? &req->req : 0);
1619
1620 net2272_ep_write(ep, EP_STAT0, stat0 &
1621 ~((1 << NAK_OUT_PACKETS)
1622 | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)));
1623 net2272_ep_write(ep, EP_STAT1, stat1);
1624
1625 /* data packet(s) received (in the fifo, OUT)
1626 * direction must be validated, otherwise control read status phase
1627 * could be interpreted as a valid packet
1628 */
1629 if (!ep->is_in && (stat0 & (1 << DATA_PACKET_RECEIVED_INTERRUPT)))
1630 net2272_pio_advance(ep);
1631 /* data packet(s) transmitted (IN) */
1632 else if (stat0 & (1 << DATA_PACKET_TRANSMITTED_INTERRUPT))
1633 net2272_pio_advance(ep);
1634}
1635
1636static struct net2272_ep *
1637net2272_get_ep_by_addr(struct net2272 *dev, u16 wIndex)
1638{
1639 struct net2272_ep *ep;
1640
1641 if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0)
1642 return &dev->ep[0];
1643
1644 list_for_each_entry(ep, &dev->gadget.ep_list, ep.ep_list) {
1645 u8 bEndpointAddress;
1646
1647 if (!ep->desc)
1648 continue;
1649 bEndpointAddress = ep->desc->bEndpointAddress;
1650 if ((wIndex ^ bEndpointAddress) & USB_DIR_IN)
1651 continue;
1652 if ((wIndex & 0x0f) == (bEndpointAddress & 0x0f))
1653 return ep;
1654 }
1655 return NULL;
1656}
1657
1658/*
1659 * USB Test Packet:
1660 * JKJKJKJK * 9
1661 * JJKKJJKK * 8
1662 * JJJJKKKK * 8
1663 * JJJJJJJKKKKKKK * 8
1664 * JJJJJJJK * 8
1665 * {JKKKKKKK * 10}, JK
1666 */
1667static const u8 net2272_test_packet[] = {
1668 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
1669 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA,
1670 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE,
1671 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
1672 0x7F, 0xBF, 0xDF, 0xEF, 0xF7, 0xFB, 0xFD,
1673 0xFC, 0x7E, 0xBF, 0xDF, 0xEF, 0xF7, 0xFD, 0x7E
1674};
1675
1676static void
1677net2272_set_test_mode(struct net2272 *dev, int mode)
1678{
1679 int i;
1680
1681 /* Disable all net2272 interrupts:
1682 * Nothing but a power cycle should stop the test.
1683 */
1684 net2272_write(dev, IRQENB0, 0x00);
1685 net2272_write(dev, IRQENB1, 0x00);
1686
1687 /* Force tranceiver to high-speed */
1688 net2272_write(dev, XCVRDIAG, 1 << FORCE_HIGH_SPEED);
1689
1690 net2272_write(dev, PAGESEL, 0);
1691 net2272_write(dev, EP_STAT0, 1 << DATA_PACKET_TRANSMITTED_INTERRUPT);
1692 net2272_write(dev, EP_RSPCLR,
1693 (1 << CONTROL_STATUS_PHASE_HANDSHAKE)
1694 | (1 << HIDE_STATUS_PHASE));
1695 net2272_write(dev, EP_CFG, 1 << ENDPOINT_DIRECTION);
1696 net2272_write(dev, EP_STAT1, 1 << BUFFER_FLUSH);
1697
1698 /* wait for status phase to complete */
1699 while (!(net2272_read(dev, EP_STAT0) &
1700 (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)))
1701 ;
1702
1703 /* Enable test mode */
1704 net2272_write(dev, USBTEST, mode);
1705
1706 /* load test packet */
1707 if (mode == TEST_PACKET) {
1708 /* switch to 8 bit mode */
1709 net2272_write(dev, LOCCTL, net2272_read(dev, LOCCTL) &
1710 ~(1 << DATA_WIDTH));
1711
1712 for (i = 0; i < sizeof(net2272_test_packet); ++i)
1713 net2272_write(dev, EP_DATA, net2272_test_packet[i]);
1714
1715 /* Validate test packet */
1716 net2272_write(dev, EP_TRANSFER0, 0);
1717 }
1718}
1719
1720static void
1721net2272_handle_stat0_irqs(struct net2272 *dev, u8 stat)
1722{
1723 struct net2272_ep *ep;
1724 u8 num, scratch;
1725
1726 /* starting a control request? */
1727 if (unlikely(stat & (1 << SETUP_PACKET_INTERRUPT))) {
1728 union {
1729 u8 raw[8];
1730 struct usb_ctrlrequest r;
1731 } u;
1732 int tmp = 0;
1733 struct net2272_request *req;
1734
1735 if (dev->gadget.speed == USB_SPEED_UNKNOWN) {
1736 if (net2272_read(dev, USBCTL1) & (1 << USB_HIGH_SPEED))
1737 dev->gadget.speed = USB_SPEED_HIGH;
1738 else
1739 dev->gadget.speed = USB_SPEED_FULL;
e538dfda
MN		 1740 dev_dbg(dev->dev, "%s\n",
1741 usb_speed_string(dev->gadget.speed));
ceb80363
SL		 1742 }
1743
1744 ep = &dev->ep[0];
1745 ep->irqs++;
1746
1747 /* make sure any leftover interrupt state is cleared */
1748 stat &= ~(1 << ENDPOINT_0_INTERRUPT);
1749 while (!list_empty(&ep->queue)) {
1750 req = list_entry(ep->queue.next,
1751 struct net2272_request, queue);
1752 net2272_done(ep, req,
1753 (req->req.actual == req->req.length) ? 0 : -EPROTO);
1754 }
1755 ep->stopped = 0;
1756 dev->protocol_stall = 0;
1757 net2272_ep_write(ep, EP_STAT0,
1758 (1 << DATA_IN_TOKEN_INTERRUPT)
1759 | (1 << DATA_OUT_TOKEN_INTERRUPT)
1760 | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)
1761 | (1 << DATA_PACKET_RECEIVED_INTERRUPT)
1762 | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT));
1763 net2272_ep_write(ep, EP_STAT1,
1764 (1 << TIMEOUT)
1765 | (1 << USB_OUT_ACK_SENT)
1766 | (1 << USB_OUT_NAK_SENT)
1767 | (1 << USB_IN_ACK_RCVD)
1768 | (1 << USB_IN_NAK_SENT)
1769 | (1 << USB_STALL_SENT)
1770 | (1 << LOCAL_OUT_ZLP));
1771
1772 /*
1773 * Ensure Control Read pre-validation setting is beyond maximum size
1774 * - Control Writes can leave non-zero values in EP_TRANSFER. If
1775 * an EP0 transfer following the Control Write is a Control Read,
1776 * the NET2272 sees the non-zero EP_TRANSFER as an unexpected
1777 * pre-validation count.
1778 * - Setting EP_TRANSFER beyond the maximum EP0 transfer size ensures
1779 * the pre-validation count cannot cause an unexpected validatation
1780 */
1781 net2272_write(dev, PAGESEL, 0);
1782 net2272_write(dev, EP_TRANSFER2, 0xff);
1783 net2272_write(dev, EP_TRANSFER1, 0xff);
1784 net2272_write(dev, EP_TRANSFER0, 0xff);
1785
1786 u.raw[0] = net2272_read(dev, SETUP0);
1787 u.raw[1] = net2272_read(dev, SETUP1);
1788 u.raw[2] = net2272_read(dev, SETUP2);
1789 u.raw[3] = net2272_read(dev, SETUP3);
1790 u.raw[4] = net2272_read(dev, SETUP4);
1791 u.raw[5] = net2272_read(dev, SETUP5);
1792 u.raw[6] = net2272_read(dev, SETUP6);
1793 u.raw[7] = net2272_read(dev, SETUP7);
1794 /*
1795 * If you have a big endian cpu make sure le16_to_cpus
1796 * performs the proper byte swapping here...
1797 */
1798 le16_to_cpus(&u.r.wValue);
1799 le16_to_cpus(&u.r.wIndex);
1800 le16_to_cpus(&u.r.wLength);
1801
1802 /* ack the irq */
1803 net2272_write(dev, IRQSTAT0, 1 << SETUP_PACKET_INTERRUPT);
1804 stat ^= (1 << SETUP_PACKET_INTERRUPT);
1805
1806 /* watch control traffic at the token level, and force
1807 * synchronization before letting the status phase happen.
1808 */
1809 ep->is_in = (u.r.bRequestType & USB_DIR_IN) != 0;
1810 if (ep->is_in) {
1811 scratch = (1 << DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE)
1812 | (1 << DATA_OUT_TOKEN_INTERRUPT_ENABLE)
1813 | (1 << DATA_IN_TOKEN_INTERRUPT_ENABLE);
1814 stop_out_naking(ep);
1815 } else
1816 scratch = (1 << DATA_PACKET_RECEIVED_INTERRUPT_ENABLE)
1817 | (1 << DATA_OUT_TOKEN_INTERRUPT_ENABLE)
1818 | (1 << DATA_IN_TOKEN_INTERRUPT_ENABLE);
1819 net2272_ep_write(ep, EP_IRQENB, scratch);
1820
1821 if ((u.r.bRequestType & USB_TYPE_MASK) != USB_TYPE_STANDARD)
1822 goto delegate;
1823 switch (u.r.bRequest) {
1824 case USB_REQ_GET_STATUS: {
1825 struct net2272_ep *e;
1826 u16 status = 0;
1827
1828 switch (u.r.bRequestType & USB_RECIP_MASK) {
1829 case USB_RECIP_ENDPOINT:
1830 e = net2272_get_ep_by_addr(dev, u.r.wIndex);
1831 if (!e || u.r.wLength > 2)
1832 goto do_stall;
1833 if (net2272_ep_read(e, EP_RSPSET) & (1 << ENDPOINT_HALT))
1834 status = __constant_cpu_to_le16(1);
1835 else
1836 status = __constant_cpu_to_le16(0);
1837
1838 /* don't bother with a request object! */
1839 net2272_ep_write(&dev->ep[0], EP_IRQENB, 0);
1840 writew(status, net2272_reg_addr(dev, EP_DATA));
1841 set_fifo_bytecount(&dev->ep[0], 0);
1842 allow_status(ep);
1843 dev_vdbg(dev->dev, "%s stat %02x\n",
1844 ep->ep.name, status);
1845 goto next_endpoints;
1846 case USB_RECIP_DEVICE:
1847 if (u.r.wLength > 2)
1848 goto do_stall;
1849 if (dev->is_selfpowered)
1850 status = (1 << USB_DEVICE_SELF_POWERED);
1851
1852 /* don't bother with a request object! */
1853 net2272_ep_write(&dev->ep[0], EP_IRQENB, 0);
1854 writew(status, net2272_reg_addr(dev, EP_DATA));
1855 set_fifo_bytecount(&dev->ep[0], 0);
1856 allow_status(ep);
1857 dev_vdbg(dev->dev, "device stat %02x\n", status);
1858 goto next_endpoints;
1859 case USB_RECIP_INTERFACE:
1860 if (u.r.wLength > 2)
1861 goto do_stall;
1862
1863 /* don't bother with a request object! */
1864 net2272_ep_write(&dev->ep[0], EP_IRQENB, 0);
1865 writew(status, net2272_reg_addr(dev, EP_DATA));
1866 set_fifo_bytecount(&dev->ep[0], 0);
1867 allow_status(ep);
1868 dev_vdbg(dev->dev, "interface status %02x\n", status);
1869 goto next_endpoints;
1870 }
1871
1872 break;
1873 }
1874 case USB_REQ_CLEAR_FEATURE: {
1875 struct net2272_ep *e;
1876
1877 if (u.r.bRequestType != USB_RECIP_ENDPOINT)
1878 goto delegate;
1879 if (u.r.wValue != USB_ENDPOINT_HALT ||
1880 u.r.wLength != 0)
1881 goto do_stall;
1882 e = net2272_get_ep_by_addr(dev, u.r.wIndex);
1883 if (!e)
1884 goto do_stall;
1885 if (e->wedged) {
1886 dev_vdbg(dev->dev, "%s wedged, halt not cleared\n",
1887 ep->ep.name);
1888 } else {
1889 dev_vdbg(dev->dev, "%s clear halt\n", ep->ep.name);
1890 clear_halt(e);
1891 }
1892 allow_status(ep);
1893 goto next_endpoints;
1894 }
1895 case USB_REQ_SET_FEATURE: {
1896 struct net2272_ep *e;
1897
1898 if (u.r.bRequestType == USB_RECIP_DEVICE) {
1899 if (u.r.wIndex != NORMAL_OPERATION)
1900 net2272_set_test_mode(dev, (u.r.wIndex >> 8));
1901 allow_status(ep);
1902 dev_vdbg(dev->dev, "test mode: %d\n", u.r.wIndex);
1903 goto next_endpoints;
1904 } else if (u.r.bRequestType != USB_RECIP_ENDPOINT)
1905 goto delegate;
1906 if (u.r.wValue != USB_ENDPOINT_HALT ||
1907 u.r.wLength != 0)
1908 goto do_stall;
1909 e = net2272_get_ep_by_addr(dev, u.r.wIndex);
1910 if (!e)
1911 goto do_stall;
1912 set_halt(e);
1913 allow_status(ep);
1914 dev_vdbg(dev->dev, "%s set halt\n", ep->ep.name);
1915 goto next_endpoints;
1916 }
1917 case USB_REQ_SET_ADDRESS: {
1918 net2272_write(dev, OURADDR, u.r.wValue & 0xff);
1919 allow_status(ep);
1920 break;
1921 }
1922 default:
1923 delegate:
1924 dev_vdbg(dev->dev, "setup %02x.%02x v%04x i%04x "
1925 "ep_cfg %08x\n",
1926 u.r.bRequestType, u.r.bRequest,
1927 u.r.wValue, u.r.wIndex,
1928 net2272_ep_read(ep, EP_CFG));
1929 spin_unlock(&dev->lock);
1930 tmp = dev->driver->setup(&dev->gadget, &u.r);
1931 spin_lock(&dev->lock);
1932 }
1933
1934 /* stall ep0 on error */
1935 if (tmp < 0) {
1936 do_stall:
1937 dev_vdbg(dev->dev, "req %02x.%02x protocol STALL; stat %d\n",
1938 u.r.bRequestType, u.r.bRequest, tmp);
1939 dev->protocol_stall = 1;
1940 }
1941 /* endpoint dma irq? */
1942 } else if (stat & (1 << DMA_DONE_INTERRUPT)) {
1943 net2272_cancel_dma(dev);
1944 net2272_write(dev, IRQSTAT0, 1 << DMA_DONE_INTERRUPT);
1945 stat &= ~(1 << DMA_DONE_INTERRUPT);
1946 num = (net2272_read(dev, DMAREQ) & (1 << DMA_ENDPOINT_SELECT))
1947 ? 2 : 1;
1948
1949 ep = &dev->ep[num];
1950 net2272_handle_dma(ep);
1951 }
1952
1953 next_endpoints:
1954 /* endpoint data irq? */
1955 scratch = stat & 0x0f;
1956 stat &= ~0x0f;
1957 for (num = 0; scratch; num++) {
1958 u8 t;
1959
1960 /* does this endpoint's FIFO and queue need tending? */
1961 t = 1 << num;
1962 if ((scratch & t) == 0)
1963 continue;
1964 scratch ^= t;
1965
1966 ep = &dev->ep[num];
1967 net2272_handle_ep(ep);
1968 }
1969
1970 /* some interrupts we can just ignore */
1971 stat &= ~(1 << SOF_INTERRUPT);
1972
1973 if (stat)
1974 dev_dbg(dev->dev, "unhandled irqstat0 %02x\n", stat);
1975}
1976
1977static void
1978net2272_handle_stat1_irqs(struct net2272 *dev, u8 stat)
1979{
1980 u8 tmp, mask;
1981
1982 /* after disconnect there's nothing else to do! */
1983 tmp = (1 << VBUS_INTERRUPT) | (1 << ROOT_PORT_RESET_INTERRUPT);
1984 mask = (1 << USB_HIGH_SPEED) | (1 << USB_FULL_SPEED);
1985
1986 if (stat & tmp) {
1987 net2272_write(dev, IRQSTAT1, tmp);
1988 if ((((stat & (1 << ROOT_PORT_RESET_INTERRUPT)) &&
1989 ((net2272_read(dev, USBCTL1) & mask) == 0))
1990 || ((net2272_read(dev, USBCTL1) & (1 << VBUS_PIN))
1991 == 0))
1992 && (dev->gadget.speed != USB_SPEED_UNKNOWN)) {
1993 dev_dbg(dev->dev, "disconnect %s\n",
1994 dev->driver->driver.name);
1995 stop_activity(dev, dev->driver);
1996 net2272_ep0_start(dev);
1997 return;
1998 }
1999 stat &= ~tmp;
2000
2001 if (!stat)
2002 return;
2003 }
2004
2005 tmp = (1 << SUSPEND_REQUEST_CHANGE_INTERRUPT);
2006 if (stat & tmp) {
2007 net2272_write(dev, IRQSTAT1, tmp);
2008 if (stat & (1 << SUSPEND_REQUEST_INTERRUPT)) {
2009 if (dev->driver->suspend)
2010 dev->driver->suspend(&dev->gadget);
2011 if (!enable_suspend) {
2012 stat &= ~(1 << SUSPEND_REQUEST_INTERRUPT);
2013 dev_dbg(dev->dev, "Suspend disabled, ignoring\n");
2014 }
2015 } else {
2016 if (dev->driver->resume)
2017 dev->driver->resume(&dev->gadget);
2018 }
2019 stat &= ~tmp;
2020 }
2021
2022 /* clear any other status/irqs */
2023 if (stat)
2024 net2272_write(dev, IRQSTAT1, stat);
2025
2026 /* some status we can just ignore */
2027 stat &= ~((1 << CONTROL_STATUS_INTERRUPT)
2028 | (1 << SUSPEND_REQUEST_INTERRUPT)
2029 | (1 << RESUME_INTERRUPT));
2030 if (!stat)
2031 return;
2032 else
2033 dev_dbg(dev->dev, "unhandled irqstat1 %02x\n", stat);
2034}
2035
2036static irqreturn_t net2272_irq(int irq, void *_dev)
2037{
2038 struct net2272 *dev = _dev;
2039#if defined(PLX_PCI_RDK) || defined(PLX_PCI_RDK2)
2040 u32 intcsr;
2041#endif
2042#if defined(PLX_PCI_RDK)
2043 u8 dmareq;
2044#endif
2045 spin_lock(&dev->lock);
2046#if defined(PLX_PCI_RDK)
2047 intcsr = readl(dev->rdk1.plx9054_base_addr + INTCSR);
2048
2049 if ((intcsr & LOCAL_INTERRUPT_TEST) == LOCAL_INTERRUPT_TEST) {
2050 writel(intcsr & ~(1 << PCI_INTERRUPT_ENABLE),
2051 dev->rdk1.plx9054_base_addr + INTCSR);
2052 net2272_handle_stat1_irqs(dev, net2272_read(dev, IRQSTAT1));
2053 net2272_handle_stat0_irqs(dev, net2272_read(dev, IRQSTAT0));
2054 intcsr = readl(dev->rdk1.plx9054_base_addr + INTCSR);
2055 writel(intcsr | (1 << PCI_INTERRUPT_ENABLE),
2056 dev->rdk1.plx9054_base_addr + INTCSR);
2057 }
2058 if ((intcsr & DMA_CHANNEL_0_TEST) == DMA_CHANNEL_0_TEST) {
2059 writeb((1 << CHANNEL_CLEAR_INTERRUPT | (0 << CHANNEL_ENABLE)),
2060 dev->rdk1.plx9054_base_addr + DMACSR0);
2061
2062 dmareq = net2272_read(dev, DMAREQ);
2063 if (dmareq & 0x01)
2064 net2272_handle_dma(&dev->ep[2]);
2065 else
2066 net2272_handle_dma(&dev->ep[1]);
2067 }
2068#endif
2069#if defined(PLX_PCI_RDK2)
2070 /* see if PCI int for us by checking irqstat */
2071 intcsr = readl(dev->rdk2.fpga_base_addr + RDK2_IRQSTAT);
000b7f51
WY		 2072 if (!intcsr & (1 << NET2272_PCI_IRQ)) {
2073 spin_unlock(&dev->lock);
ceb80363 2074 return IRQ_NONE;
000b7f51 2075 }
ceb80363
SL		 2076 /* check dma interrupts */
2077#endif
2078 /* Platform/devcice interrupt handler */
2079#if !defined(PLX_PCI_RDK)
2080 net2272_handle_stat1_irqs(dev, net2272_read(dev, IRQSTAT1));
2081 net2272_handle_stat0_irqs(dev, net2272_read(dev, IRQSTAT0));
2082#endif
2083 spin_unlock(&dev->lock);
2084
2085 return IRQ_HANDLED;
2086}
2087
2088static int net2272_present(struct net2272 *dev)
2089{
2090 /*
2091 * Quick test to see if CPU can communicate properly with the NET2272.
2092 * Verifies connection using writes and reads to write/read and
2093 * read-only registers.
2094 *
2095 * This routine is strongly recommended especially during early bring-up
2096 * of new hardware, however for designs that do not apply Power On System
2097 * Tests (POST) it may discarded (or perhaps minimized).
2098 */
2099 unsigned int ii;
2100 u8 val, refval;
2101
2102 /* Verify NET2272 write/read SCRATCH register can write and read */
2103 refval = net2272_read(dev, SCRATCH);
2104 for (ii = 0; ii < 0x100; ii += 7) {
2105 net2272_write(dev, SCRATCH, ii);
2106 val = net2272_read(dev, SCRATCH);
2107 if (val != ii) {
2108 dev_dbg(dev->dev,
2109 "%s: write/read SCRATCH register test failed: "
2110 "wrote:0x%2.2x, read:0x%2.2x\n",
2111 __func__, ii, val);
2112 return -EINVAL;
2113 }
2114 }
2115 /* To be nice, we write the original SCRATCH value back: */
2116 net2272_write(dev, SCRATCH, refval);
2117
2118 /* Verify NET2272 CHIPREV register is read-only: */
2119 refval = net2272_read(dev, CHIPREV_2272);
2120 for (ii = 0; ii < 0x100; ii += 7) {
2121 net2272_write(dev, CHIPREV_2272, ii);
2122 val = net2272_read(dev, CHIPREV_2272);
2123 if (val != refval) {
2124 dev_dbg(dev->dev,
2125 "%s: write/read CHIPREV register test failed: "
2126 "wrote 0x%2.2x, read:0x%2.2x expected:0x%2.2x\n",
2127 __func__, ii, val, refval);
2128 return -EINVAL;
2129 }
2130 }
2131
2132 /*
2133 * Verify NET2272's "NET2270 legacy revision" register
2134 * - NET2272 has two revision registers. The NET2270 legacy revision
2135 * register should read the same value, regardless of the NET2272
2136 * silicon revision. The legacy register applies to NET2270
2137 * firmware being applied to the NET2272.
2138 */
2139 val = net2272_read(dev, CHIPREV_LEGACY);
2140 if (val != NET2270_LEGACY_REV) {
2141 /*
2142 * Unexpected legacy revision value
2143 * - Perhaps the chip is a NET2270?
2144 */
2145 dev_dbg(dev->dev,
2146 "%s: WARNING: UNEXPECTED NET2272 LEGACY REGISTER VALUE:\n"
2147 " - CHIPREV_LEGACY: expected 0x%2.2x, got:0x%2.2x. (Not NET2272?)\n",
2148 __func__, NET2270_LEGACY_REV, val);
2149 return -EINVAL;
2150 }
2151
2152 /*
2153 * Verify NET2272 silicon revision
2154 * - This revision register is appropriate for the silicon version
2155 * of the NET2272
2156 */
2157 val = net2272_read(dev, CHIPREV_2272);
2158 switch (val) {
2159 case CHIPREV_NET2272_R1:
2160 /*
2161 * NET2272 Rev 1 has DMA related errata:
2162 * - Newer silicon (Rev 1A or better) required
2163 */
2164 dev_dbg(dev->dev,
2165 "%s: Rev 1 detected: newer silicon recommended for DMA support\n",
2166 __func__);
2167 break;
2168 case CHIPREV_NET2272_R1A:
2169 break;
2170 default:
2171 /* NET2272 silicon version *may* not work with this firmware */
2172 dev_dbg(dev->dev,
2173 "%s: unexpected silicon revision register value: "
2174 " CHIPREV_2272: 0x%2.2x\n",
2175 __func__, val);
2176 /*
2177 * Return Success, even though the chip rev is not an expected value
2178 * - Older, pre-built firmware can attempt to operate on newer silicon
2179 * - Often, new silicon is perfectly compatible
2180 */
2181 }
2182
2183 /* Success: NET2272 checks out OK */
2184 return 0;
2185}
2186
2187static void
2188net2272_gadget_release(struct device *_dev)
2189{
2190 struct net2272 *dev = dev_get_drvdata(_dev);
2191 kfree(dev);
2192}
2193
2194/*---------------------------------------------------------------------------*/
2195
fb4e98ab 2196static void
ceb80363
SL		 2197net2272_remove(struct net2272 *dev)
2198{
0f91349b
SAS		 2199 usb_del_gadget_udc(&dev->gadget);
2200
ceb80363
SL		 2201 /* start with the driver above us */
2202 if (dev->driver) {
2203 /* should have been done already by driver model core */
2204 dev_warn(dev->dev, "pci remove, driver '%s' is still registered\n",
2205 dev->driver->driver.name);
2206 usb_gadget_unregister_driver(dev->driver);
2207 }
2208
2209 free_irq(dev->irq, dev);
2210 iounmap(dev->base_addr);
2211
2212 device_unregister(&dev->gadget.dev);
2213 device_remove_file(dev->dev, &dev_attr_registers);
2214
2215 dev_info(dev->dev, "unbind\n");
ceb80363
SL		 2216}
2217
41ac7b3a 2218static struct net2272 *net2272_probe_init(struct device *dev, unsigned int irq)
ceb80363
SL		 2219{
2220 struct net2272 *ret;
2221
ceb80363
SL		 2222 if (!irq) {
2223 dev_dbg(dev, "No IRQ!\n");
2224 return ERR_PTR(-ENODEV);
2225 }
2226
2227 /* alloc, and start init */
2228 ret = kzalloc(sizeof(*ret), GFP_KERNEL);
2229 if (!ret)
2230 return ERR_PTR(-ENOMEM);
2231
2232 spin_lock_init(&ret->lock);
2233 ret->irq = irq;
2234 ret->dev = dev;
2235 ret->gadget.ops = &net2272_ops;
d327ab5b 2236 ret->gadget.max_speed = USB_SPEED_HIGH;
ceb80363
SL		 2237
2238 /* the "gadget" abstracts/virtualizes the controller */
2239 dev_set_name(&ret->gadget.dev, "gadget");
2240 ret->gadget.dev.parent = dev;
2241 ret->gadget.dev.dma_mask = dev->dma_mask;
2242 ret->gadget.dev.release = net2272_gadget_release;
2243 ret->gadget.name = driver_name;
2244
2245 return ret;
2246}
2247
41ac7b3a 2248static int
ceb80363
SL		 2249net2272_probe_fin(struct net2272 *dev, unsigned int irqflags)
2250{
2251 int ret;
2252
2253 /* See if there... */
2254 if (net2272_present(dev)) {
2255 dev_warn(dev->dev, "2272 not found!\n");
2256 ret = -ENODEV;
2257 goto err;
2258 }
2259
2260 net2272_usb_reset(dev);
2261 net2272_usb_reinit(dev);
2262
2263 ret = request_irq(dev->irq, net2272_irq, irqflags, driver_name, dev);
2264 if (ret) {
2265 dev_err(dev->dev, "request interrupt %i failed\n", dev->irq);
2266 goto err;
2267 }
2268
2269 dev->chiprev = net2272_read(dev, CHIPREV_2272);
2270
2271 /* done */
2272 dev_info(dev->dev, "%s\n", driver_desc);
2273 dev_info(dev->dev, "irq %i, mem %p, chip rev %04x, dma %s\n",
2274 dev->irq, dev->base_addr, dev->chiprev,
2275 dma_mode_string());
2276 dev_info(dev->dev, "version: %s\n", driver_vers);
2277
ceb80363
SL		 2278 ret = device_register(&dev->gadget.dev);
2279 if (ret)
2280 goto err_irq;
2281 ret = device_create_file(dev->dev, &dev_attr_registers);
2282 if (ret)
2283 goto err_dev_reg;
2284
0f91349b
SAS		 2285 ret = usb_add_gadget_udc(dev->dev, &dev->gadget);
2286 if (ret)
2287 goto err_add_udc;
2288
ceb80363
SL		 2289 return 0;
2290
0f91349b
SAS		 2291err_add_udc:
2292 device_remove_file(dev->dev, &dev_attr_registers);
ceb80363
SL		 2293 err_dev_reg:
2294 device_unregister(&dev->gadget.dev);
2295 err_irq:
2296 free_irq(dev->irq, dev);
2297 err:
2298 return ret;
2299}
2300
2301#ifdef CONFIG_PCI
2302
2303/*
2304 * wrap this driver around the specified device, but
2305 * don't respond over USB until a gadget driver binds to us
2306 */
2307
41ac7b3a 2308static int
ceb80363
SL		 2309net2272_rdk1_probe(struct pci_dev *pdev, struct net2272 *dev)
2310{
2311 unsigned long resource, len, tmp;
2312 void __iomem *mem_mapped_addr[4];
2313 int ret, i;
2314
2315 /*
2316 * BAR 0 holds PLX 9054 config registers
2317 * BAR 1 is i/o memory; unused here
2318 * BAR 2 holds EPLD config registers
2319 * BAR 3 holds NET2272 registers
2320 */
2321
2322 /* Find and map all address spaces */
2323 for (i = 0; i < 4; ++i) {
2324 if (i == 1)
2325 continue; /* BAR1 unused */
2326
2327 resource = pci_resource_start(pdev, i);
2328 len = pci_resource_len(pdev, i);
2329
2330 if (!request_mem_region(resource, len, driver_name)) {
2331 dev_dbg(dev->dev, "controller already in use\n");
2332 ret = -EBUSY;
2333 goto err;
2334 }
2335
2336 mem_mapped_addr[i] = ioremap_nocache(resource, len);
2337 if (mem_mapped_addr[i] == NULL) {
2338 release_mem_region(resource, len);
2339 dev_dbg(dev->dev, "can't map memory\n");
2340 ret = -EFAULT;
2341 goto err;
2342 }
2343 }
2344
2345 dev->rdk1.plx9054_base_addr = mem_mapped_addr[0];
2346 dev->rdk1.epld_base_addr = mem_mapped_addr[2];
2347 dev->base_addr = mem_mapped_addr[3];
2348
2349 /* Set PLX 9054 bus width (16 bits) */
2350 tmp = readl(dev->rdk1.plx9054_base_addr + LBRD1);
2351 writel((tmp & ~(3 << MEMORY_SPACE_LOCAL_BUS_WIDTH)) | W16_BIT,
2352 dev->rdk1.plx9054_base_addr + LBRD1);
2353
2354 /* Enable PLX 9054 Interrupts */
2355 writel(readl(dev->rdk1.plx9054_base_addr + INTCSR) |
2356 (1 << PCI_INTERRUPT_ENABLE) |
2357 (1 << LOCAL_INTERRUPT_INPUT_ENABLE),
2358 dev->rdk1.plx9054_base_addr + INTCSR);
2359
2360 writeb((1 << CHANNEL_CLEAR_INTERRUPT | (0 << CHANNEL_ENABLE)),
2361 dev->rdk1.plx9054_base_addr + DMACSR0);
2362
2363 /* reset */
2364 writeb((1 << EPLD_DMA_ENABLE) |
2365 (1 << DMA_CTL_DACK) |
2366 (1 << DMA_TIMEOUT_ENABLE) |
2367 (1 << USER) |
2368 (0 << MPX_MODE) |
2369 (1 << BUSWIDTH) |
2370 (1 << NET2272_RESET),
2371 dev->base_addr + EPLD_IO_CONTROL_REGISTER);
2372
2373 mb();
2374 writeb(readb(dev->base_addr + EPLD_IO_CONTROL_REGISTER) &
2375 ~(1 << NET2272_RESET),
2376 dev->base_addr + EPLD_IO_CONTROL_REGISTER);
2377 udelay(200);
2378
2379 return 0;
2380
2381 err:
2382 while (--i >= 0) {
2383 iounmap(mem_mapped_addr[i]);
2384 release_mem_region(pci_resource_start(pdev, i),
2385 pci_resource_len(pdev, i));
2386 }
2387
2388 return ret;
2389}
2390
41ac7b3a 2391static int
ceb80363
SL		 2392net2272_rdk2_probe(struct pci_dev *pdev, struct net2272 *dev)
2393{
2394 unsigned long resource, len;
2395 void __iomem *mem_mapped_addr[2];
2396 int ret, i;
2397
2398 /*
2399 * BAR 0 holds FGPA config registers
2400 * BAR 1 holds NET2272 registers
2401 */
2402
2403 /* Find and map all address spaces, bar2-3 unused in rdk 2 */
2404 for (i = 0; i < 2; ++i) {
2405 resource = pci_resource_start(pdev, i);
2406 len = pci_resource_len(pdev, i);
2407
2408 if (!request_mem_region(resource, len, driver_name)) {
2409 dev_dbg(dev->dev, "controller already in use\n");
2410 ret = -EBUSY;
2411 goto err;
2412 }
2413
2414 mem_mapped_addr[i] = ioremap_nocache(resource, len);
2415 if (mem_mapped_addr[i] == NULL) {
2416 release_mem_region(resource, len);
2417 dev_dbg(dev->dev, "can't map memory\n");
2418 ret = -EFAULT;
2419 goto err;
2420 }
2421 }
2422
2423 dev->rdk2.fpga_base_addr = mem_mapped_addr[0];
2424 dev->base_addr = mem_mapped_addr[1];
2425
2426 mb();
2427 /* Set 2272 bus width (16 bits) and reset */
2428 writel((1 << CHIP_RESET), dev->rdk2.fpga_base_addr + RDK2_LOCCTLRDK);
2429 udelay(200);
2430 writel((1 << BUS_WIDTH), dev->rdk2.fpga_base_addr + RDK2_LOCCTLRDK);
2431 /* Print fpga version number */
2432 dev_info(dev->dev, "RDK2 FPGA version %08x\n",
2433 readl(dev->rdk2.fpga_base_addr + RDK2_FPGAREV));
2434 /* Enable FPGA Interrupts */
2435 writel((1 << NET2272_PCI_IRQ), dev->rdk2.fpga_base_addr + RDK2_IRQENB);
2436
2437 return 0;
2438
2439 err:
2440 while (--i >= 0) {
2441 iounmap(mem_mapped_addr[i]);
2442 release_mem_region(pci_resource_start(pdev, i),
2443 pci_resource_len(pdev, i));
2444 }
2445
2446 return ret;
2447}
2448
41ac7b3a 2449static int
ceb80363
SL		 2450net2272_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2451{
2452 struct net2272 *dev;
2453 int ret;
2454
2455 dev = net2272_probe_init(&pdev->dev, pdev->irq);
2456 if (IS_ERR(dev))
2457 return PTR_ERR(dev);
2458 dev->dev_id = pdev->device;
2459
2460 if (pci_enable_device(pdev) < 0) {
2461 ret = -ENODEV;
2462 goto err_free;
2463 }
2464
2465 pci_set_master(pdev);
2466
2467 switch (pdev->device) {
2468 case PCI_DEVICE_ID_RDK1: ret = net2272_rdk1_probe(pdev, dev); break;
2469 case PCI_DEVICE_ID_RDK2: ret = net2272_rdk2_probe(pdev, dev); break;
2470 default: BUG();
2471 }
2472 if (ret)
2473 goto err_pci;
2474
2475 ret = net2272_probe_fin(dev, 0);
2476 if (ret)
2477 goto err_pci;
2478
2479 pci_set_drvdata(pdev, dev);
2480
2481 return 0;
2482
2483 err_pci:
2484 pci_disable_device(pdev);
2485 err_free:
2486 kfree(dev);
2487
2488 return ret;
2489}
2490
fb4e98ab 2491static void
ceb80363
SL		 2492net2272_rdk1_remove(struct pci_dev *pdev, struct net2272 *dev)
2493{
2494 int i;
2495
2496 /* disable PLX 9054 interrupts */
2497 writel(readl(dev->rdk1.plx9054_base_addr + INTCSR) &
2498 ~(1 << PCI_INTERRUPT_ENABLE),
2499 dev->rdk1.plx9054_base_addr + INTCSR);
2500
2501 /* clean up resources allocated during probe() */
2502 iounmap(dev->rdk1.plx9054_base_addr);
2503 iounmap(dev->rdk1.epld_base_addr);
2504
2505 for (i = 0; i < 4; ++i) {
2506 if (i == 1)
2507 continue; /* BAR1 unused */
2508 release_mem_region(pci_resource_start(pdev, i),
2509 pci_resource_len(pdev, i));
2510 }
2511}
2512
fb4e98ab 2513static void
ceb80363
SL		 2514net2272_rdk2_remove(struct pci_dev *pdev, struct net2272 *dev)
2515{
2516 int i;
2517
2518 /* disable fpga interrupts
2519 writel(readl(dev->rdk1.plx9054_base_addr + INTCSR) &
2520 ~(1 << PCI_INTERRUPT_ENABLE),
2521 dev->rdk1.plx9054_base_addr + INTCSR);
2522 */
2523
2524 /* clean up resources allocated during probe() */
2525 iounmap(dev->rdk2.fpga_base_addr);
2526
2527 for (i = 0; i < 2; ++i)
2528 release_mem_region(pci_resource_start(pdev, i),
2529 pci_resource_len(pdev, i));
2530}
2531
fb4e98ab 2532static void
ceb80363
SL		 2533net2272_pci_remove(struct pci_dev *pdev)
2534{
2535 struct net2272 *dev = pci_get_drvdata(pdev);
2536
2537 net2272_remove(dev);
2538
2539 switch (pdev->device) {
2540 case PCI_DEVICE_ID_RDK1: net2272_rdk1_remove(pdev, dev); break;
2541 case PCI_DEVICE_ID_RDK2: net2272_rdk2_remove(pdev, dev); break;
2542 default: BUG();
2543 }
2544
2545 pci_disable_device(pdev);
2546
2547 kfree(dev);
2548}
2549
2550/* Table of matching PCI IDs */
d3608b6d 2551static struct pci_device_id pci_ids[] = {
ceb80363
SL		 2552 { /* RDK 1 card */
2553 .class = ((PCI_CLASS_BRIDGE_OTHER << 8) | 0xfe),
2554 .class_mask = 0,
2555 .vendor = PCI_VENDOR_ID_PLX,
2556 .device = PCI_DEVICE_ID_RDK1,
2557 .subvendor = PCI_ANY_ID,
2558 .subdevice = PCI_ANY_ID,
2559 },
2560 { /* RDK 2 card */
2561 .class = ((PCI_CLASS_BRIDGE_OTHER << 8) | 0xfe),
2562 .class_mask = 0,
2563 .vendor = PCI_VENDOR_ID_PLX,
2564 .device = PCI_DEVICE_ID_RDK2,
2565 .subvendor = PCI_ANY_ID,
2566 .subdevice = PCI_ANY_ID,
2567 },
2568 { }
2569};
2570MODULE_DEVICE_TABLE(pci, pci_ids);
2571
2572static struct pci_driver net2272_pci_driver = {
2573 .name = driver_name,
2574 .id_table = pci_ids,
2575
2576 .probe = net2272_pci_probe,
7690417d 2577 .remove = net2272_pci_remove,
ceb80363
SL		 2578};
2579
e4fe056e
SAS		 2580static int net2272_pci_register(void)
2581{
2582 return pci_register_driver(&net2272_pci_driver);
2583}
2584
2585static void net2272_pci_unregister(void)
2586{
2587 pci_unregister_driver(&net2272_pci_driver);
2588}
2589
ceb80363 2590#else
e4fe056e
SAS		 2591static inline int net2272_pci_register(void) { return 0; }
2592static inline void net2272_pci_unregister(void) { }
ceb80363
SL		 2593#endif
2594
2595/*---------------------------------------------------------------------------*/
2596
41ac7b3a 2597static int
ceb80363
SL		 2598net2272_plat_probe(struct platform_device *pdev)
2599{
2600 struct net2272 *dev;
2601 int ret;
2602 unsigned int irqflags;
2603 resource_size_t base, len;
2604 struct resource *iomem, *iomem_bus, *irq_res;
2605
2606 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
2607 iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2608 iomem_bus = platform_get_resource(pdev, IORESOURCE_BUS, 0);
2609 if (!irq_res || !iomem) {
2610 dev_err(&pdev->dev, "must provide irq/base addr");
2611 return -EINVAL;
2612 }
2613
2614 dev = net2272_probe_init(&pdev->dev, irq_res->start);
2615 if (IS_ERR(dev))
2616 return PTR_ERR(dev);
2617
2618 irqflags = 0;
2619 if (irq_res->flags & IORESOURCE_IRQ_HIGHEDGE)
2620 irqflags |= IRQF_TRIGGER_RISING;
2621 if (irq_res->flags & IORESOURCE_IRQ_LOWEDGE)
2622 irqflags |= IRQF_TRIGGER_FALLING;
2623 if (irq_res->flags & IORESOURCE_IRQ_HIGHLEVEL)
2624 irqflags |= IRQF_TRIGGER_HIGH;
2625 if (irq_res->flags & IORESOURCE_IRQ_LOWLEVEL)
2626 irqflags |= IRQF_TRIGGER_LOW;
2627
2628 base = iomem->start;
2629 len = resource_size(iomem);
2630 if (iomem_bus)
2631 dev->base_shift = iomem_bus->start;
2632
2633 if (!request_mem_region(base, len, driver_name)) {
2634 dev_dbg(dev->dev, "get request memory region!\n");
2635 ret = -EBUSY;
2636 goto err;
2637 }
2638 dev->base_addr = ioremap_nocache(base, len);
2639 if (!dev->base_addr) {
2640 dev_dbg(dev->dev, "can't map memory\n");
2641 ret = -EFAULT;
2642 goto err_req;
2643 }
2644
2645 ret = net2272_probe_fin(dev, IRQF_TRIGGER_LOW);
2646 if (ret)
2647 goto err_io;
2648
2649 platform_set_drvdata(pdev, dev);
2650 dev_info(&pdev->dev, "running in 16-bit, %sbyte swap local bus mode\n",
2651 (net2272_read(dev, LOCCTL) & (1 << BYTE_SWAP)) ? "" : "no ");
2652
ceb80363
SL		 2653 return 0;
2654
2655 err_io:
2656 iounmap(dev->base_addr);
2657 err_req:
2658 release_mem_region(base, len);
2659 err:
2660 return ret;
2661}
2662
fb4e98ab 2663static int
ceb80363
SL		 2664net2272_plat_remove(struct platform_device *pdev)
2665{
2666 struct net2272 *dev = platform_get_drvdata(pdev);
2667
2668 net2272_remove(dev);
2669
2670 release_mem_region(pdev->resource[0].start,
2671 resource_size(&pdev->resource[0]));
2672
2673 kfree(dev);
2674
2675 return 0;
2676}
2677
2678static struct platform_driver net2272_plat_driver = {
2679 .probe = net2272_plat_probe,
7690417d 2680 .remove = net2272_plat_remove,
ceb80363
SL		 2681 .driver = {
2682 .name = driver_name,
2683 .owner = THIS_MODULE,
2684 },
2685 /* FIXME .suspend, .resume */
2686};
86081d7b 2687MODULE_ALIAS("platform:net2272");
ceb80363
SL		 2688
2689static int __init net2272_init(void)
2690{
e4fe056e
SAS		 2691 int ret;
2692
2693 ret = net2272_pci_register();
2694 if (ret)
2695 return ret;
2696 ret = platform_driver_register(&net2272_plat_driver);
2697 if (ret)
2698 goto err_pci;
2699 return ret;
2700
2701err_pci:
2702 net2272_pci_unregister();
2703 return ret;
ceb80363
SL		 2704}
2705module_init(net2272_init);
2706
2707static void __exit net2272_cleanup(void)
2708{
e4fe056e 2709 net2272_pci_unregister();
ceb80363
SL		 2710 platform_driver_unregister(&net2272_plat_driver);
2711}
2712module_exit(net2272_cleanup);
2713
2714MODULE_DESCRIPTION(DRIVER_DESC);
2715MODULE_AUTHOR("PLX Technology, Inc.");
2716MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)