blob: 57d9641c6bf8c7bf4ed968a714ed8bd168e3289e [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * omap_udc.c -- for OMAP full speed udc; most chips support OTG.
3 *
4 * Copyright (C) 2004 Texas Instruments, Inc.
5 * Copyright (C) 2004-2005 David Brownell
6 *
Kyungmin Park527ea732007-11-21 15:13:15 -08007 * OMAP2 & DMA support by Kyungmin Park <kyungmin.park@samsung.com>
8 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 */
23
24#undef DEBUG
25#undef VERBOSE
26
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <linux/module.h>
28#include <linux/kernel.h>
29#include <linux/ioport.h>
30#include <linux/types.h>
31#include <linux/errno.h>
32#include <linux/delay.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include <linux/slab.h>
34#include <linux/init.h>
35#include <linux/timer.h>
36#include <linux/list.h>
37#include <linux/interrupt.h>
38#include <linux/proc_fs.h>
39#include <linux/mm.h>
40#include <linux/moduleparam.h>
Russell Kingd052d1b2005-10-29 19:07:23 +010041#include <linux/platform_device.h>
David Brownell5f848132006-12-16 15:34:53 -080042#include <linux/usb/ch9.h>
David Brownell9454a572007-10-04 18:05:17 -070043#include <linux/usb/gadget.h>
David Brownell3a16f7b2006-06-29 12:27:23 -070044#include <linux/usb/otg.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include <linux/dma-mapping.h>
David Brownelle6a6e472006-12-10 11:47:04 -080046#include <linux/clk.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
48#include <asm/byteorder.h>
49#include <asm/io.h>
50#include <asm/irq.h>
51#include <asm/system.h>
52#include <asm/unaligned.h>
53#include <asm/mach-types.h>
54
Russell Kinga09e64f2008-08-05 16:14:15 +010055#include <mach/dma.h>
56#include <mach/usb.h>
Dmitry Baryshkove12cc342008-08-07 16:29:25 +040057#include <mach/control.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
59#include "omap_udc.h"
60
61#undef USB_TRACE
62
63/* bulk DMA seems to be behaving for both IN and OUT */
64#define USE_DMA
65
66/* ISO too */
67#define USE_ISO
68
69#define DRIVER_DESC "OMAP UDC driver"
70#define DRIVER_VERSION "4 October 2004"
71
72#define DMA_ADDR_INVALID (~(dma_addr_t)0)
73
Kyungmin Park527ea732007-11-21 15:13:15 -080074#define OMAP2_DMA_CH(ch) (((ch) - 1) << 1)
75#define OMAP24XX_DMA(name, ch) (OMAP24XX_DMA_##name + OMAP2_DMA_CH(ch))
Linus Torvalds1da177e2005-04-16 15:20:36 -070076
77/*
78 * The OMAP UDC needs _very_ early endpoint setup: before enabling the
79 * D+ pullup to allow enumeration. That's too early for the gadget
80 * framework to use from usb_endpoint_enable(), which happens after
81 * enumeration as part of activating an interface. (But if we add an
82 * optional new "UDC not yet running" state to the gadget driver model,
83 * even just during driver binding, the endpoint autoconfig logic is the
84 * natural spot to manufacture new endpoints.)
85 *
86 * So instead of using endpoint enable calls to control the hardware setup,
87 * this driver defines a "fifo mode" parameter. It's used during driver
88 * initialization to choose among a set of pre-defined endpoint configs.
89 * See omap_udc_setup() for available modes, or to add others. That code
90 * lives in an init section, so use this driver as a module if you need
91 * to change the fifo mode after the kernel boots.
92 *
93 * Gadget drivers normally ignore endpoints they don't care about, and
94 * won't include them in configuration descriptors. That means only
95 * misbehaving hosts would even notice they exist.
96 */
97#ifdef USE_ISO
98static unsigned fifo_mode = 3;
99#else
100static unsigned fifo_mode = 0;
101#endif
102
103/* "modprobe omap_udc fifo_mode=42", or else as a kernel
104 * boot parameter "omap_udc:fifo_mode=42"
105 */
106module_param (fifo_mode, uint, 0);
David Brownelle6a6e472006-12-10 11:47:04 -0800107MODULE_PARM_DESC (fifo_mode, "endpoint configuration");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108
109#ifdef USE_DMA
110static unsigned use_dma = 1;
111
112/* "modprobe omap_udc use_dma=y", or else as a kernel
113 * boot parameter "omap_udc:use_dma=y"
114 */
115module_param (use_dma, bool, 0);
116MODULE_PARM_DESC (use_dma, "enable/disable DMA");
117#else /* !USE_DMA */
118
119/* save a bit of code */
120#define use_dma 0
121#endif /* !USE_DMA */
122
123
124static const char driver_name [] = "omap_udc";
125static const char driver_desc [] = DRIVER_DESC;
126
127/*-------------------------------------------------------------------------*/
128
129/* there's a notion of "current endpoint" for modifying endpoint
David Brownelle6a6e472006-12-10 11:47:04 -0800130 * state, and PIO access to its FIFO.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 */
132
133static void use_ep(struct omap_ep *ep, u16 select)
134{
135 u16 num = ep->bEndpointAddress & 0x0f;
136
137 if (ep->bEndpointAddress & USB_DIR_IN)
138 num |= UDC_EP_DIR;
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300139 omap_writew(num | select, UDC_EP_NUM);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 /* when select, MUST deselect later !! */
141}
142
143static inline void deselect_ep(void)
144{
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300145 u16 w;
146
147 w = omap_readw(UDC_EP_NUM);
148 w &= ~UDC_EP_SEL;
149 omap_writew(w, UDC_EP_NUM);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 /* 6 wait states before TX will happen */
151}
152
153static void dma_channel_claim(struct omap_ep *ep, unsigned preferred);
154
155/*-------------------------------------------------------------------------*/
156
157static int omap_ep_enable(struct usb_ep *_ep,
158 const struct usb_endpoint_descriptor *desc)
159{
160 struct omap_ep *ep = container_of(_ep, struct omap_ep, ep);
161 struct omap_udc *udc;
162 unsigned long flags;
163 u16 maxp;
164
165 /* catch various bogus parameters */
166 if (!_ep || !desc || ep->desc
167 || desc->bDescriptorType != USB_DT_ENDPOINT
168 || ep->bEndpointAddress != desc->bEndpointAddress
169 || ep->maxpacket < le16_to_cpu
170 (desc->wMaxPacketSize)) {
Harvey Harrison441b62c2008-03-03 16:08:34 -0800171 DBG("%s, bad ep or descriptor\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 return -EINVAL;
173 }
174 maxp = le16_to_cpu (desc->wMaxPacketSize);
175 if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK
176 && maxp != ep->maxpacket)
David Brownell65111082005-04-28 13:52:31 -0700177 || le16_to_cpu(desc->wMaxPacketSize) > ep->maxpacket
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 || !desc->wMaxPacketSize) {
Harvey Harrison441b62c2008-03-03 16:08:34 -0800179 DBG("%s, bad %s maxpacket\n", __func__, _ep->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 return -ERANGE;
181 }
182
183#ifdef USE_ISO
184 if ((desc->bmAttributes == USB_ENDPOINT_XFER_ISOC
185 && desc->bInterval != 1)) {
186 /* hardware wants period = 1; USB allows 2^(Interval-1) */
187 DBG("%s, unsupported ISO period %dms\n", _ep->name,
188 1 << (desc->bInterval - 1));
189 return -EDOM;
190 }
191#else
192 if (desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
193 DBG("%s, ISO nyet\n", _ep->name);
194 return -EDOM;
195 }
196#endif
197
198 /* xfer types must match, except that interrupt ~= bulk */
199 if (ep->bmAttributes != desc->bmAttributes
200 && ep->bmAttributes != USB_ENDPOINT_XFER_BULK
201 && desc->bmAttributes != USB_ENDPOINT_XFER_INT) {
Harvey Harrison441b62c2008-03-03 16:08:34 -0800202 DBG("%s, %s type mismatch\n", __func__, _ep->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 return -EINVAL;
204 }
205
206 udc = ep->udc;
207 if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN) {
Harvey Harrison441b62c2008-03-03 16:08:34 -0800208 DBG("%s, bogus device state\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 return -ESHUTDOWN;
210 }
211
212 spin_lock_irqsave(&udc->lock, flags);
213
214 ep->desc = desc;
215 ep->irqs = 0;
216 ep->stopped = 0;
217 ep->ep.maxpacket = maxp;
218
219 /* set endpoint to initial state */
220 ep->dma_channel = 0;
221 ep->has_dma = 0;
222 ep->lch = -1;
223 use_ep(ep, UDC_EP_SEL);
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300224 omap_writew(udc->clr_halt, UDC_CTRL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 ep->ackwait = 0;
226 deselect_ep();
227
228 if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC)
229 list_add(&ep->iso, &udc->iso);
230
231 /* maybe assign a DMA channel to this endpoint */
232 if (use_dma && desc->bmAttributes == USB_ENDPOINT_XFER_BULK)
233 /* FIXME ISO can dma, but prefers first channel */
234 dma_channel_claim(ep, 0);
235
236 /* PIO OUT may RX packets */
237 if (desc->bmAttributes != USB_ENDPOINT_XFER_ISOC
238 && !ep->has_dma
239 && !(ep->bEndpointAddress & USB_DIR_IN)) {
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300240 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 ep->ackwait = 1 + ep->double_buf;
242 }
243
244 spin_unlock_irqrestore(&udc->lock, flags);
245 VDBG("%s enabled\n", _ep->name);
246 return 0;
247}
248
249static void nuke(struct omap_ep *, int status);
250
251static int omap_ep_disable(struct usb_ep *_ep)
252{
253 struct omap_ep *ep = container_of(_ep, struct omap_ep, ep);
254 unsigned long flags;
255
256 if (!_ep || !ep->desc) {
Harvey Harrison441b62c2008-03-03 16:08:34 -0800257 DBG("%s, %s not enabled\n", __func__,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 _ep ? ep->ep.name : NULL);
259 return -EINVAL;
260 }
261
262 spin_lock_irqsave(&ep->udc->lock, flags);
David Brownell313980c2005-04-11 15:38:25 -0700263 ep->desc = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 nuke (ep, -ESHUTDOWN);
265 ep->ep.maxpacket = ep->maxpacket;
266 ep->has_dma = 0;
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300267 omap_writew(UDC_SET_HALT, UDC_CTRL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 list_del_init(&ep->iso);
269 del_timer(&ep->timer);
270
271 spin_unlock_irqrestore(&ep->udc->lock, flags);
272
273 VDBG("%s disabled\n", _ep->name);
274 return 0;
275}
276
277/*-------------------------------------------------------------------------*/
278
279static struct usb_request *
Al Viro55016f12005-10-21 03:21:58 -0400280omap_alloc_request(struct usb_ep *ep, gfp_t gfp_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281{
282 struct omap_req *req;
283
Eric Sesterhenn7039f422006-02-27 13:34:10 -0800284 req = kzalloc(sizeof(*req), gfp_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 if (req) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 req->req.dma = DMA_ADDR_INVALID;
287 INIT_LIST_HEAD (&req->queue);
288 }
289 return &req->req;
290}
291
292static void
293omap_free_request(struct usb_ep *ep, struct usb_request *_req)
294{
295 struct omap_req *req = container_of(_req, struct omap_req, req);
296
297 if (_req)
298 kfree (req);
299}
300
301/*-------------------------------------------------------------------------*/
302
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303static void
304done(struct omap_ep *ep, struct omap_req *req, int status)
305{
306 unsigned stopped = ep->stopped;
307
308 list_del_init(&req->queue);
309
310 if (req->req.status == -EINPROGRESS)
311 req->req.status = status;
312 else
313 status = req->req.status;
314
315 if (use_dma && ep->has_dma) {
316 if (req->mapped) {
317 dma_unmap_single(ep->udc->gadget.dev.parent,
318 req->req.dma, req->req.length,
319 (ep->bEndpointAddress & USB_DIR_IN)
320 ? DMA_TO_DEVICE
321 : DMA_FROM_DEVICE);
322 req->req.dma = DMA_ADDR_INVALID;
323 req->mapped = 0;
324 } else
325 dma_sync_single_for_cpu(ep->udc->gadget.dev.parent,
326 req->req.dma, req->req.length,
327 (ep->bEndpointAddress & USB_DIR_IN)
328 ? DMA_TO_DEVICE
329 : DMA_FROM_DEVICE);
330 }
331
332#ifndef USB_TRACE
333 if (status && status != -ESHUTDOWN)
334#endif
335 VDBG("complete %s req %p stat %d len %u/%u\n",
336 ep->ep.name, &req->req, status,
337 req->req.actual, req->req.length);
338
339 /* don't modify queue heads during completion callback */
340 ep->stopped = 1;
341 spin_unlock(&ep->udc->lock);
342 req->req.complete(&ep->ep, &req->req);
343 spin_lock(&ep->udc->lock);
344 ep->stopped = stopped;
345}
346
347/*-------------------------------------------------------------------------*/
348
David Brownell313980c2005-04-11 15:38:25 -0700349#define UDC_FIFO_FULL (UDC_NON_ISO_FIFO_FULL | UDC_ISO_FIFO_FULL)
350#define UDC_FIFO_UNWRITABLE (UDC_EP_HALTED | UDC_FIFO_FULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351
352#define FIFO_EMPTY (UDC_NON_ISO_FIFO_EMPTY | UDC_ISO_FIFO_EMPTY)
353#define FIFO_UNREADABLE (UDC_EP_HALTED | FIFO_EMPTY)
354
David Brownelle6a6e472006-12-10 11:47:04 -0800355static inline int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356write_packet(u8 *buf, struct omap_req *req, unsigned max)
357{
358 unsigned len;
359 u16 *wp;
360
361 len = min(req->req.length - req->req.actual, max);
362 req->req.actual += len;
363
364 max = len;
365 if (likely((((int)buf) & 1) == 0)) {
366 wp = (u16 *)buf;
367 while (max >= 2) {
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300368 omap_writew(*wp++, UDC_DATA);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 max -= 2;
370 }
371 buf = (u8 *)wp;
372 }
373 while (max--)
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300374 omap_writeb(*buf++, UDC_DATA);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 return len;
376}
377
378// FIXME change r/w fifo calling convention
379
380
381// return: 0 = still running, 1 = completed, negative = errno
382static int write_fifo(struct omap_ep *ep, struct omap_req *req)
383{
384 u8 *buf;
385 unsigned count;
386 int is_last;
387 u16 ep_stat;
388
389 buf = req->req.buf + req->req.actual;
390 prefetch(buf);
391
392 /* PIO-IN isn't double buffered except for iso */
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300393 ep_stat = omap_readw(UDC_STAT_FLG);
David Brownell313980c2005-04-11 15:38:25 -0700394 if (ep_stat & UDC_FIFO_UNWRITABLE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 return 0;
396
397 count = ep->ep.maxpacket;
398 count = write_packet(buf, req, count);
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300399 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 ep->ackwait = 1;
401
402 /* last packet is often short (sometimes a zlp) */
403 if (count != ep->ep.maxpacket)
404 is_last = 1;
405 else if (req->req.length == req->req.actual
406 && !req->req.zero)
407 is_last = 1;
408 else
409 is_last = 0;
410
411 /* NOTE: requests complete when all IN data is in a
412 * FIFO (or sometimes later, if a zlp was needed).
413 * Use usb_ep_fifo_status() where needed.
414 */
415 if (is_last)
416 done(ep, req, 0);
417 return is_last;
418}
419
David Brownelle6a6e472006-12-10 11:47:04 -0800420static inline int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421read_packet(u8 *buf, struct omap_req *req, unsigned avail)
422{
423 unsigned len;
424 u16 *wp;
425
426 len = min(req->req.length - req->req.actual, avail);
427 req->req.actual += len;
428 avail = len;
429
430 if (likely((((int)buf) & 1) == 0)) {
431 wp = (u16 *)buf;
432 while (avail >= 2) {
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300433 *wp++ = omap_readw(UDC_DATA);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 avail -= 2;
435 }
436 buf = (u8 *)wp;
437 }
438 while (avail--)
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300439 *buf++ = omap_readb(UDC_DATA);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 return len;
441}
442
443// return: 0 = still running, 1 = queue empty, negative = errno
444static int read_fifo(struct omap_ep *ep, struct omap_req *req)
445{
446 u8 *buf;
447 unsigned count, avail;
448 int is_last;
449
450 buf = req->req.buf + req->req.actual;
451 prefetchw(buf);
452
453 for (;;) {
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300454 u16 ep_stat = omap_readw(UDC_STAT_FLG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455
456 is_last = 0;
457 if (ep_stat & FIFO_EMPTY) {
458 if (!ep->double_buf)
459 break;
460 ep->fnf = 1;
461 }
462 if (ep_stat & UDC_EP_HALTED)
463 break;
464
David Brownell313980c2005-04-11 15:38:25 -0700465 if (ep_stat & UDC_FIFO_FULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466 avail = ep->ep.maxpacket;
467 else {
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300468 avail = omap_readw(UDC_RXFSTAT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 ep->fnf = ep->double_buf;
470 }
471 count = read_packet(buf, req, avail);
472
473 /* partial packet reads may not be errors */
474 if (count < ep->ep.maxpacket) {
475 is_last = 1;
476 /* overflowed this request? flush extra data */
477 if (count != avail) {
478 req->req.status = -EOVERFLOW;
479 avail -= count;
480 while (avail--)
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300481 omap_readw(UDC_DATA);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 }
483 } else if (req->req.length == req->req.actual)
484 is_last = 1;
485 else
486 is_last = 0;
487
488 if (!ep->bEndpointAddress)
489 break;
490 if (is_last)
491 done(ep, req, 0);
492 break;
493 }
494 return is_last;
495}
496
497/*-------------------------------------------------------------------------*/
498
499static u16 dma_src_len(struct omap_ep *ep, dma_addr_t start)
500{
501 dma_addr_t end;
502
503 /* IN-DMA needs this on fault/cancel paths, so 15xx misreports
504 * the last transfer's bytecount by more than a FIFO's worth.
505 */
506 if (cpu_is_omap15xx())
507 return 0;
508
Tony Lindgren0499bde2008-07-03 12:24:36 +0300509 end = omap_get_dma_src_pos(ep->lch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 if (end == ep->dma_counter)
511 return 0;
512
513 end |= start & (0xffff << 16);
514 if (end < start)
515 end += 0x10000;
516 return end - start;
517}
518
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519static u16 dma_dest_len(struct omap_ep *ep, dma_addr_t start)
520{
521 dma_addr_t end;
522
Tony Lindgren0499bde2008-07-03 12:24:36 +0300523 end = omap_get_dma_dst_pos(ep->lch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524 if (end == ep->dma_counter)
525 return 0;
526
527 end |= start & (0xffff << 16);
528 if (cpu_is_omap15xx())
529 end++;
530 if (end < start)
531 end += 0x10000;
532 return end - start;
533}
534
535
536/* Each USB transfer request using DMA maps to one or more DMA transfers.
537 * When DMA completion isn't request completion, the UDC continues with
538 * the next DMA transfer for that USB transfer.
539 */
540
541static void next_in_dma(struct omap_ep *ep, struct omap_req *req)
542{
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300543 u16 txdma_ctrl, w;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544 unsigned length = req->req.length - req->req.actual;
545 const int sync_mode = cpu_is_omap15xx()
546 ? OMAP_DMA_SYNC_FRAME
547 : OMAP_DMA_SYNC_ELEMENT;
Kyungmin Park527ea732007-11-21 15:13:15 -0800548 int dma_trigger = 0;
549
550 if (cpu_is_omap24xx())
551 dma_trigger = OMAP24XX_DMA(USB_W2FC_TX0, ep->dma_channel);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552
553 /* measure length in either bytes or packets */
David Brownell65111082005-04-28 13:52:31 -0700554 if ((cpu_is_omap16xx() && length <= UDC_TXN_TSC)
Kyungmin Park527ea732007-11-21 15:13:15 -0800555 || (cpu_is_omap24xx() && length < ep->maxpacket)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 || (cpu_is_omap15xx() && length < ep->maxpacket)) {
557 txdma_ctrl = UDC_TXN_EOT | length;
558 omap_set_dma_transfer_params(ep->lch, OMAP_DMA_DATA_TYPE_S8,
Kyungmin Park527ea732007-11-21 15:13:15 -0800559 length, 1, sync_mode, dma_trigger, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 } else {
561 length = min(length / ep->maxpacket,
562 (unsigned) UDC_TXN_TSC + 1);
David Brownelle6a6e472006-12-10 11:47:04 -0800563 txdma_ctrl = length;
David Brownell65111082005-04-28 13:52:31 -0700564 omap_set_dma_transfer_params(ep->lch, OMAP_DMA_DATA_TYPE_S16,
David Brownelle6a6e472006-12-10 11:47:04 -0800565 ep->ep.maxpacket >> 1, length, sync_mode,
Kyungmin Park527ea732007-11-21 15:13:15 -0800566 dma_trigger, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567 length *= ep->maxpacket;
568 }
569 omap_set_dma_src_params(ep->lch, OMAP_DMA_PORT_EMIFF,
David Brownelle6a6e472006-12-10 11:47:04 -0800570 OMAP_DMA_AMODE_POST_INC, req->req.dma + req->req.actual,
571 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572
573 omap_start_dma(ep->lch);
Tony Lindgren0499bde2008-07-03 12:24:36 +0300574 ep->dma_counter = omap_get_dma_src_pos(ep->lch);
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300575 w = omap_readw(UDC_DMA_IRQ_EN);
576 w |= UDC_TX_DONE_IE(ep->dma_channel);
577 omap_writew(w, UDC_DMA_IRQ_EN);
578 omap_writew(UDC_TXN_START | txdma_ctrl, UDC_TXDMA(ep->dma_channel));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 req->dma_bytes = length;
580}
581
582static void finish_in_dma(struct omap_ep *ep, struct omap_req *req, int status)
583{
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300584 u16 w;
585
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 if (status == 0) {
587 req->req.actual += req->dma_bytes;
588
589 /* return if this request needs to send data or zlp */
590 if (req->req.actual < req->req.length)
591 return;
592 if (req->req.zero
593 && req->dma_bytes != 0
594 && (req->req.actual % ep->maxpacket) == 0)
595 return;
596 } else
597 req->req.actual += dma_src_len(ep, req->req.dma
598 + req->req.actual);
599
600 /* tx completion */
601 omap_stop_dma(ep->lch);
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300602 w = omap_readw(UDC_DMA_IRQ_EN);
603 w &= ~UDC_TX_DONE_IE(ep->dma_channel);
604 omap_writew(w, UDC_DMA_IRQ_EN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 done(ep, req, status);
606}
607
608static void next_out_dma(struct omap_ep *ep, struct omap_req *req)
609{
Kyungmin Park527ea732007-11-21 15:13:15 -0800610 unsigned packets = req->req.length - req->req.actual;
611 int dma_trigger = 0;
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300612 u16 w;
Kyungmin Park527ea732007-11-21 15:13:15 -0800613
614 if (cpu_is_omap24xx())
615 dma_trigger = OMAP24XX_DMA(USB_W2FC_RX0, ep->dma_channel);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616
617 /* NOTE: we filtered out "short reads" before, so we know
618 * the buffer has only whole numbers of packets.
Kyungmin Park527ea732007-11-21 15:13:15 -0800619 * except MODE SELECT(6) sent the 24 bytes data in OMAP24XX DMA mode
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 */
Kyungmin Park527ea732007-11-21 15:13:15 -0800621 if (cpu_is_omap24xx() && packets < ep->maxpacket) {
622 omap_set_dma_transfer_params(ep->lch, OMAP_DMA_DATA_TYPE_S8,
623 packets, 1, OMAP_DMA_SYNC_ELEMENT,
624 dma_trigger, 0);
625 req->dma_bytes = packets;
626 } else {
627 /* set up this DMA transfer, enable the fifo, start */
628 packets /= ep->ep.maxpacket;
629 packets = min(packets, (unsigned)UDC_RXN_TC + 1);
630 req->dma_bytes = packets * ep->ep.maxpacket;
631 omap_set_dma_transfer_params(ep->lch, OMAP_DMA_DATA_TYPE_S16,
632 ep->ep.maxpacket >> 1, packets,
633 OMAP_DMA_SYNC_ELEMENT,
634 dma_trigger, 0);
635 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636 omap_set_dma_dest_params(ep->lch, OMAP_DMA_PORT_EMIFF,
David Brownelle6a6e472006-12-10 11:47:04 -0800637 OMAP_DMA_AMODE_POST_INC, req->req.dma + req->req.actual,
638 0, 0);
Tony Lindgren0499bde2008-07-03 12:24:36 +0300639 ep->dma_counter = omap_get_dma_dst_pos(ep->lch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300641 omap_writew(UDC_RXN_STOP | (packets - 1), UDC_RXDMA(ep->dma_channel));
642 w = omap_readw(UDC_DMA_IRQ_EN);
643 w |= UDC_RX_EOT_IE(ep->dma_channel);
644 omap_writew(w, UDC_DMA_IRQ_EN);
645 omap_writew(ep->bEndpointAddress & 0xf, UDC_EP_NUM);
646 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647
648 omap_start_dma(ep->lch);
649}
650
651static void
David Brownellcb97c5c2005-10-16 15:06:51 -0700652finish_out_dma(struct omap_ep *ep, struct omap_req *req, int status, int one)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653{
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300654 u16 count, w;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655
656 if (status == 0)
657 ep->dma_counter = (u16) (req->req.dma + req->req.actual);
658 count = dma_dest_len(ep, req->req.dma + req->req.actual);
659 count += req->req.actual;
David Brownellcb97c5c2005-10-16 15:06:51 -0700660 if (one)
661 count--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 if (count <= req->req.length)
663 req->req.actual = count;
664
665 if (count != req->dma_bytes || status)
666 omap_stop_dma(ep->lch);
667
668 /* if this wasn't short, request may need another transfer */
669 else if (req->req.actual < req->req.length)
670 return;
671
672 /* rx completion */
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300673 w = omap_readw(UDC_DMA_IRQ_EN);
674 w &= ~UDC_RX_EOT_IE(ep->dma_channel);
675 omap_writew(w, UDC_DMA_IRQ_EN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676 done(ep, req, status);
677}
678
679static void dma_irq(struct omap_udc *udc, u16 irq_src)
680{
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300681 u16 dman_stat = omap_readw(UDC_DMAN_STAT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 struct omap_ep *ep;
683 struct omap_req *req;
684
685 /* IN dma: tx to host */
686 if (irq_src & UDC_TXN_DONE) {
687 ep = &udc->ep[16 + UDC_DMA_TX_SRC(dman_stat)];
688 ep->irqs++;
689 /* can see TXN_DONE after dma abort */
690 if (!list_empty(&ep->queue)) {
691 req = container_of(ep->queue.next,
692 struct omap_req, queue);
693 finish_in_dma(ep, req, 0);
694 }
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300695 omap_writew(UDC_TXN_DONE, UDC_IRQ_SRC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696
697 if (!list_empty (&ep->queue)) {
698 req = container_of(ep->queue.next,
699 struct omap_req, queue);
700 next_in_dma(ep, req);
701 }
702 }
703
704 /* OUT dma: rx from host */
705 if (irq_src & UDC_RXN_EOT) {
706 ep = &udc->ep[UDC_DMA_RX_SRC(dman_stat)];
707 ep->irqs++;
708 /* can see RXN_EOT after dma abort */
709 if (!list_empty(&ep->queue)) {
710 req = container_of(ep->queue.next,
711 struct omap_req, queue);
David Brownellcb97c5c2005-10-16 15:06:51 -0700712 finish_out_dma(ep, req, 0, dman_stat & UDC_DMA_RX_SB);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 }
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300714 omap_writew(UDC_RXN_EOT, UDC_IRQ_SRC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715
716 if (!list_empty (&ep->queue)) {
717 req = container_of(ep->queue.next,
718 struct omap_req, queue);
719 next_out_dma(ep, req);
720 }
721 }
722
723 if (irq_src & UDC_RXN_CNT) {
724 ep = &udc->ep[UDC_DMA_RX_SRC(dman_stat)];
725 ep->irqs++;
726 /* omap15xx does this unasked... */
727 VDBG("%s, RX_CNT irq?\n", ep->ep.name);
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300728 omap_writew(UDC_RXN_CNT, UDC_IRQ_SRC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729 }
730}
731
732static void dma_error(int lch, u16 ch_status, void *data)
733{
734 struct omap_ep *ep = data;
735
736 /* if ch_status & OMAP_DMA_DROP_IRQ ... */
Tony Lindgren7ff879d2006-06-26 16:16:15 -0700737 /* if ch_status & OMAP1_DMA_TOUT_IRQ ... */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738 ERR("%s dma error, lch %d status %02x\n", ep->ep.name, lch, ch_status);
739
740 /* complete current transfer ... */
741}
742
743static void dma_channel_claim(struct omap_ep *ep, unsigned channel)
744{
745 u16 reg;
746 int status, restart, is_in;
Kyungmin Park527ea732007-11-21 15:13:15 -0800747 int dma_channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748
749 is_in = ep->bEndpointAddress & USB_DIR_IN;
750 if (is_in)
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300751 reg = omap_readw(UDC_TXDMA_CFG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 else
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300753 reg = omap_readw(UDC_RXDMA_CFG);
David Brownell65111082005-04-28 13:52:31 -0700754 reg |= UDC_DMA_REQ; /* "pulse" activated */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755
756 ep->dma_channel = 0;
757 ep->lch = -1;
758 if (channel == 0 || channel > 3) {
759 if ((reg & 0x0f00) == 0)
760 channel = 3;
761 else if ((reg & 0x00f0) == 0)
762 channel = 2;
763 else if ((reg & 0x000f) == 0) /* preferred for ISO */
764 channel = 1;
765 else {
766 status = -EMLINK;
767 goto just_restart;
768 }
769 }
770 reg |= (0x0f & ep->bEndpointAddress) << (4 * (channel - 1));
771 ep->dma_channel = channel;
772
773 if (is_in) {
Kyungmin Park527ea732007-11-21 15:13:15 -0800774 if (cpu_is_omap24xx())
775 dma_channel = OMAP24XX_DMA(USB_W2FC_TX0, channel);
776 else
777 dma_channel = OMAP_DMA_USB_W2FC_TX0 - 1 + channel;
778 status = omap_request_dma(dma_channel,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 ep->ep.name, dma_error, ep, &ep->lch);
780 if (status == 0) {
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300781 omap_writew(reg, UDC_TXDMA_CFG);
Kyungmin Park527ea732007-11-21 15:13:15 -0800782 /* EMIFF or SDRC */
David Brownell65111082005-04-28 13:52:31 -0700783 omap_set_dma_src_burst_mode(ep->lch,
784 OMAP_DMA_DATA_BURST_4);
785 omap_set_dma_src_data_pack(ep->lch, 1);
786 /* TIPB */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787 omap_set_dma_dest_params(ep->lch,
788 OMAP_DMA_PORT_TIPB,
789 OMAP_DMA_AMODE_CONSTANT,
David Brownellc3e32082008-08-31 18:04:27 -0700790 UDC_DATA_DMA,
David Brownelle6a6e472006-12-10 11:47:04 -0800791 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792 }
793 } else {
Kyungmin Park527ea732007-11-21 15:13:15 -0800794 if (cpu_is_omap24xx())
795 dma_channel = OMAP24XX_DMA(USB_W2FC_RX0, channel);
796 else
797 dma_channel = OMAP_DMA_USB_W2FC_RX0 - 1 + channel;
798
799 status = omap_request_dma(dma_channel,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800 ep->ep.name, dma_error, ep, &ep->lch);
801 if (status == 0) {
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300802 omap_writew(reg, UDC_RXDMA_CFG);
David Brownell65111082005-04-28 13:52:31 -0700803 /* TIPB */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804 omap_set_dma_src_params(ep->lch,
805 OMAP_DMA_PORT_TIPB,
806 OMAP_DMA_AMODE_CONSTANT,
David Brownellc3e32082008-08-31 18:04:27 -0700807 UDC_DATA_DMA,
David Brownelle6a6e472006-12-10 11:47:04 -0800808 0, 0);
Kyungmin Park527ea732007-11-21 15:13:15 -0800809 /* EMIFF or SDRC */
David Brownell65111082005-04-28 13:52:31 -0700810 omap_set_dma_dest_burst_mode(ep->lch,
811 OMAP_DMA_DATA_BURST_4);
812 omap_set_dma_dest_data_pack(ep->lch, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813 }
814 }
815 if (status)
816 ep->dma_channel = 0;
817 else {
818 ep->has_dma = 1;
819 omap_disable_dma_irq(ep->lch, OMAP_DMA_BLOCK_IRQ);
820
821 /* channel type P: hw synch (fifo) */
Kyungmin Park527ea732007-11-21 15:13:15 -0800822 if (cpu_class_is_omap1() && !cpu_is_omap15xx())
Tony Lindgren0499bde2008-07-03 12:24:36 +0300823 omap_set_dma_channel_mode(ep->lch, OMAP_DMA_LCH_P);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824 }
825
826just_restart:
827 /* restart any queue, even if the claim failed */
828 restart = !ep->stopped && !list_empty(&ep->queue);
829
830 if (status)
831 DBG("%s no dma channel: %d%s\n", ep->ep.name, status,
832 restart ? " (restart)" : "");
833 else
834 DBG("%s claimed %cxdma%d lch %d%s\n", ep->ep.name,
835 is_in ? 't' : 'r',
836 ep->dma_channel - 1, ep->lch,
837 restart ? " (restart)" : "");
838
839 if (restart) {
840 struct omap_req *req;
841 req = container_of(ep->queue.next, struct omap_req, queue);
842 if (ep->has_dma)
843 (is_in ? next_in_dma : next_out_dma)(ep, req);
844 else {
845 use_ep(ep, UDC_EP_SEL);
846 (is_in ? write_fifo : read_fifo)(ep, req);
847 deselect_ep();
848 if (!is_in) {
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300849 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850 ep->ackwait = 1 + ep->double_buf;
851 }
852 /* IN: 6 wait states before it'll tx */
853 }
854 }
855}
856
857static void dma_channel_release(struct omap_ep *ep)
858{
859 int shift = 4 * (ep->dma_channel - 1);
860 u16 mask = 0x0f << shift;
861 struct omap_req *req;
862 int active;
863
864 /* abort any active usb transfer request */
865 if (!list_empty(&ep->queue))
866 req = container_of(ep->queue.next, struct omap_req, queue);
867 else
David Brownell313980c2005-04-11 15:38:25 -0700868 req = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869
Tony Lindgren0499bde2008-07-03 12:24:36 +0300870 active = omap_get_dma_active_status(ep->lch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871
872 DBG("%s release %s %cxdma%d %p\n", ep->ep.name,
873 active ? "active" : "idle",
874 (ep->bEndpointAddress & USB_DIR_IN) ? 't' : 'r',
875 ep->dma_channel - 1, req);
876
David Brownell65111082005-04-28 13:52:31 -0700877 /* NOTE: re-setting RX_REQ/TX_REQ because of a chip bug (before
878 * OMAP 1710 ES2.0) where reading the DMA_CFG can clear them.
879 */
880
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881 /* wait till current packet DMA finishes, and fifo empties */
882 if (ep->bEndpointAddress & USB_DIR_IN) {
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300883 omap_writew((omap_readw(UDC_TXDMA_CFG) & ~mask) | UDC_DMA_REQ,
884 UDC_TXDMA_CFG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885
886 if (req) {
887 finish_in_dma(ep, req, -ECONNRESET);
888
889 /* clear FIFO; hosts probably won't empty it */
890 use_ep(ep, UDC_EP_SEL);
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300891 omap_writew(UDC_CLR_EP, UDC_CTRL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892 deselect_ep();
893 }
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300894 while (omap_readw(UDC_TXDMA_CFG) & mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895 udelay(10);
896 } else {
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300897 omap_writew((omap_readw(UDC_RXDMA_CFG) & ~mask) | UDC_DMA_REQ,
898 UDC_RXDMA_CFG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899
900 /* dma empties the fifo */
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300901 while (omap_readw(UDC_RXDMA_CFG) & mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902 udelay(10);
903 if (req)
David Brownellcb97c5c2005-10-16 15:06:51 -0700904 finish_out_dma(ep, req, -ECONNRESET, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905 }
906 omap_free_dma(ep->lch);
907 ep->dma_channel = 0;
908 ep->lch = -1;
909 /* has_dma still set, till endpoint is fully quiesced */
910}
911
912
913/*-------------------------------------------------------------------------*/
914
915static int
Al Viro55016f12005-10-21 03:21:58 -0400916omap_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917{
918 struct omap_ep *ep = container_of(_ep, struct omap_ep, ep);
919 struct omap_req *req = container_of(_req, struct omap_req, req);
920 struct omap_udc *udc;
921 unsigned long flags;
922 int is_iso = 0;
923
924 /* catch various bogus parameters */
925 if (!_req || !req->req.complete || !req->req.buf
926 || !list_empty(&req->queue)) {
Harvey Harrison441b62c2008-03-03 16:08:34 -0800927 DBG("%s, bad params\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928 return -EINVAL;
929 }
930 if (!_ep || (!ep->desc && ep->bEndpointAddress)) {
Harvey Harrison441b62c2008-03-03 16:08:34 -0800931 DBG("%s, bad ep\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932 return -EINVAL;
933 }
934 if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
935 if (req->req.length > ep->ep.maxpacket)
936 return -EMSGSIZE;
937 is_iso = 1;
938 }
939
940 /* this isn't bogus, but OMAP DMA isn't the only hardware to
941 * have a hard time with partial packet reads... reject it.
Kyungmin Park527ea732007-11-21 15:13:15 -0800942 * Except OMAP2 can handle the small packets.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943 */
944 if (use_dma
945 && ep->has_dma
946 && ep->bEndpointAddress != 0
947 && (ep->bEndpointAddress & USB_DIR_IN) == 0
Kyungmin Park527ea732007-11-21 15:13:15 -0800948 && !cpu_class_is_omap2()
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949 && (req->req.length % ep->ep.maxpacket) != 0) {
Harvey Harrison441b62c2008-03-03 16:08:34 -0800950 DBG("%s, no partial packet OUT reads\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951 return -EMSGSIZE;
952 }
953
954 udc = ep->udc;
955 if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
956 return -ESHUTDOWN;
957
958 if (use_dma && ep->has_dma) {
959 if (req->req.dma == DMA_ADDR_INVALID) {
960 req->req.dma = dma_map_single(
961 ep->udc->gadget.dev.parent,
962 req->req.buf,
963 req->req.length,
964 (ep->bEndpointAddress & USB_DIR_IN)
965 ? DMA_TO_DEVICE
966 : DMA_FROM_DEVICE);
967 req->mapped = 1;
968 } else {
969 dma_sync_single_for_device(
970 ep->udc->gadget.dev.parent,
971 req->req.dma, req->req.length,
972 (ep->bEndpointAddress & USB_DIR_IN)
973 ? DMA_TO_DEVICE
974 : DMA_FROM_DEVICE);
975 req->mapped = 0;
976 }
977 }
978
979 VDBG("%s queue req %p, len %d buf %p\n",
980 ep->ep.name, _req, _req->length, _req->buf);
981
982 spin_lock_irqsave(&udc->lock, flags);
983
984 req->req.status = -EINPROGRESS;
985 req->req.actual = 0;
986
987 /* maybe kickstart non-iso i/o queues */
Tony Lindgrenf35ae632008-07-03 12:24:43 +0300988 if (is_iso) {
989 u16 w;
990
991 w = omap_readw(UDC_IRQ_EN);
992 w |= UDC_SOF_IE;
993 omap_writew(w, UDC_IRQ_EN);
994 } else if (list_empty(&ep->queue) && !ep->stopped && !ep->ackwait) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995 int is_in;
996
997 if (ep->bEndpointAddress == 0) {
998 if (!udc->ep0_pending || !list_empty (&ep->queue)) {
999 spin_unlock_irqrestore(&udc->lock, flags);
1000 return -EL2HLT;
1001 }
1002
1003 /* empty DATA stage? */
1004 is_in = udc->ep0_in;
1005 if (!req->req.length) {
1006
1007 /* chip became CONFIGURED or ADDRESSED
1008 * earlier; drivers may already have queued
1009 * requests to non-control endpoints
1010 */
1011 if (udc->ep0_set_config) {
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001012 u16 irq_en = omap_readw(UDC_IRQ_EN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013
1014 irq_en |= UDC_DS_CHG_IE | UDC_EP0_IE;
1015 if (!udc->ep0_reset_config)
1016 irq_en |= UDC_EPN_RX_IE
1017 | UDC_EPN_TX_IE;
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001018 omap_writew(irq_en, UDC_IRQ_EN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019 }
1020
David Brownell313980c2005-04-11 15:38:25 -07001021 /* STATUS for zero length DATA stages is
1022 * always an IN ... even for IN transfers,
Joe Perchesdc0d5c12007-12-17 11:40:18 -08001023 * a weird case which seem to stall OMAP.
David Brownell313980c2005-04-11 15:38:25 -07001024 */
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001025 omap_writew(UDC_EP_SEL | UDC_EP_DIR, UDC_EP_NUM);
1026 omap_writew(UDC_CLR_EP, UDC_CTRL);
1027 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
1028 omap_writew(UDC_EP_DIR, UDC_EP_NUM);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029
1030 /* cleanup */
1031 udc->ep0_pending = 0;
1032 done(ep, req, 0);
David Brownell313980c2005-04-11 15:38:25 -07001033 req = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034
1035 /* non-empty DATA stage */
1036 } else if (is_in) {
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001037 omap_writew(UDC_EP_SEL | UDC_EP_DIR, UDC_EP_NUM);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038 } else {
1039 if (udc->ep0_setup)
1040 goto irq_wait;
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001041 omap_writew(UDC_EP_SEL, UDC_EP_NUM);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042 }
1043 } else {
1044 is_in = ep->bEndpointAddress & USB_DIR_IN;
1045 if (!ep->has_dma)
1046 use_ep(ep, UDC_EP_SEL);
1047 /* if ISO: SOF IRQs must be enabled/disabled! */
1048 }
1049
1050 if (ep->has_dma)
1051 (is_in ? next_in_dma : next_out_dma)(ep, req);
1052 else if (req) {
1053 if ((is_in ? write_fifo : read_fifo)(ep, req) == 1)
David Brownell313980c2005-04-11 15:38:25 -07001054 req = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001055 deselect_ep();
1056 if (!is_in) {
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001057 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058 ep->ackwait = 1 + ep->double_buf;
1059 }
1060 /* IN: 6 wait states before it'll tx */
1061 }
1062 }
1063
1064irq_wait:
1065 /* irq handler advances the queue */
David Brownell313980c2005-04-11 15:38:25 -07001066 if (req != NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067 list_add_tail(&req->queue, &ep->queue);
1068 spin_unlock_irqrestore(&udc->lock, flags);
1069
1070 return 0;
1071}
1072
1073static int omap_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1074{
1075 struct omap_ep *ep = container_of(_ep, struct omap_ep, ep);
1076 struct omap_req *req;
1077 unsigned long flags;
1078
1079 if (!_ep || !_req)
1080 return -EINVAL;
1081
1082 spin_lock_irqsave(&ep->udc->lock, flags);
1083
1084 /* make sure it's actually queued on this endpoint */
1085 list_for_each_entry (req, &ep->queue, queue) {
1086 if (&req->req == _req)
1087 break;
1088 }
1089 if (&req->req != _req) {
1090 spin_unlock_irqrestore(&ep->udc->lock, flags);
1091 return -EINVAL;
1092 }
1093
1094 if (use_dma && ep->dma_channel && ep->queue.next == &req->queue) {
1095 int channel = ep->dma_channel;
1096
1097 /* releasing the channel cancels the request,
1098 * reclaiming the channel restarts the queue
1099 */
1100 dma_channel_release(ep);
1101 dma_channel_claim(ep, channel);
David Brownelle6a6e472006-12-10 11:47:04 -08001102 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103 done(ep, req, -ECONNRESET);
1104 spin_unlock_irqrestore(&ep->udc->lock, flags);
1105 return 0;
1106}
1107
1108/*-------------------------------------------------------------------------*/
1109
1110static int omap_ep_set_halt(struct usb_ep *_ep, int value)
1111{
1112 struct omap_ep *ep = container_of(_ep, struct omap_ep, ep);
1113 unsigned long flags;
1114 int status = -EOPNOTSUPP;
1115
1116 spin_lock_irqsave(&ep->udc->lock, flags);
1117
1118 /* just use protocol stalls for ep0; real halts are annoying */
1119 if (ep->bEndpointAddress == 0) {
1120 if (!ep->udc->ep0_pending)
1121 status = -EINVAL;
1122 else if (value) {
1123 if (ep->udc->ep0_set_config) {
Arjan van de Venb6c63932008-07-25 01:45:52 -07001124 WARNING("error changing config?\n");
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001125 omap_writew(UDC_CLR_CFG, UDC_SYSCON2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126 }
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001127 omap_writew(UDC_STALL_CMD, UDC_SYSCON2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128 ep->udc->ep0_pending = 0;
1129 status = 0;
1130 } else /* NOP */
1131 status = 0;
1132
1133 /* otherwise, all active non-ISO endpoints can halt */
1134 } else if (ep->bmAttributes != USB_ENDPOINT_XFER_ISOC && ep->desc) {
1135
1136 /* IN endpoints must already be idle */
1137 if ((ep->bEndpointAddress & USB_DIR_IN)
David Brownelle6a6e472006-12-10 11:47:04 -08001138 && !list_empty(&ep->queue)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139 status = -EAGAIN;
1140 goto done;
1141 }
1142
1143 if (value) {
1144 int channel;
1145
1146 if (use_dma && ep->dma_channel
1147 && !list_empty(&ep->queue)) {
1148 channel = ep->dma_channel;
1149 dma_channel_release(ep);
1150 } else
1151 channel = 0;
1152
1153 use_ep(ep, UDC_EP_SEL);
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001154 if (omap_readw(UDC_STAT_FLG) & UDC_NON_ISO_FIFO_EMPTY) {
1155 omap_writew(UDC_SET_HALT, UDC_CTRL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156 status = 0;
1157 } else
1158 status = -EAGAIN;
1159 deselect_ep();
1160
1161 if (channel)
1162 dma_channel_claim(ep, channel);
1163 } else {
1164 use_ep(ep, 0);
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001165 omap_writew(ep->udc->clr_halt, UDC_CTRL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166 ep->ackwait = 0;
1167 if (!(ep->bEndpointAddress & USB_DIR_IN)) {
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001168 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001169 ep->ackwait = 1 + ep->double_buf;
1170 }
1171 }
1172 }
1173done:
1174 VDBG("%s %s halt stat %d\n", ep->ep.name,
1175 value ? "set" : "clear", status);
1176
1177 spin_unlock_irqrestore(&ep->udc->lock, flags);
1178 return status;
1179}
1180
1181static struct usb_ep_ops omap_ep_ops = {
1182 .enable = omap_ep_enable,
1183 .disable = omap_ep_disable,
1184
1185 .alloc_request = omap_alloc_request,
1186 .free_request = omap_free_request,
1187
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188 .queue = omap_ep_queue,
1189 .dequeue = omap_ep_dequeue,
1190
1191 .set_halt = omap_ep_set_halt,
1192 // fifo_status ... report bytes in fifo
1193 // fifo_flush ... flush fifo
1194};
1195
1196/*-------------------------------------------------------------------------*/
1197
1198static int omap_get_frame(struct usb_gadget *gadget)
1199{
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001200 u16 sof = omap_readw(UDC_SOF);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201 return (sof & UDC_TS_OK) ? (sof & UDC_TS) : -EL2NSYNC;
1202}
1203
1204static int omap_wakeup(struct usb_gadget *gadget)
1205{
1206 struct omap_udc *udc;
1207 unsigned long flags;
1208 int retval = -EHOSTUNREACH;
1209
1210 udc = container_of(gadget, struct omap_udc, gadget);
1211
1212 spin_lock_irqsave(&udc->lock, flags);
1213 if (udc->devstat & UDC_SUS) {
1214 /* NOTE: OTG spec erratum says that OTG devices may
1215 * issue wakeups without host enable.
1216 */
1217 if (udc->devstat & (UDC_B_HNP_ENABLE|UDC_R_WK_OK)) {
1218 DBG("remote wakeup...\n");
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001219 omap_writew(UDC_RMT_WKP, UDC_SYSCON2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220 retval = 0;
1221 }
1222
1223 /* NOTE: non-OTG systems may use SRP TOO... */
1224 } else if (!(udc->devstat & UDC_ATT)) {
1225 if (udc->transceiver)
1226 retval = otg_start_srp(udc->transceiver);
1227 }
1228 spin_unlock_irqrestore(&udc->lock, flags);
1229
1230 return retval;
1231}
1232
1233static int
1234omap_set_selfpowered(struct usb_gadget *gadget, int is_selfpowered)
1235{
1236 struct omap_udc *udc;
1237 unsigned long flags;
1238 u16 syscon1;
1239
1240 udc = container_of(gadget, struct omap_udc, gadget);
1241 spin_lock_irqsave(&udc->lock, flags);
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001242 syscon1 = omap_readw(UDC_SYSCON1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243 if (is_selfpowered)
1244 syscon1 |= UDC_SELF_PWR;
1245 else
1246 syscon1 &= ~UDC_SELF_PWR;
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001247 omap_writew(syscon1, UDC_SYSCON1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248 spin_unlock_irqrestore(&udc->lock, flags);
1249
1250 return 0;
1251}
1252
1253static int can_pullup(struct omap_udc *udc)
1254{
1255 return udc->driver && udc->softconnect && udc->vbus_active;
1256}
1257
1258static void pullup_enable(struct omap_udc *udc)
1259{
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001260 u16 w;
1261
1262 w = omap_readw(UDC_SYSCON1);
1263 w |= UDC_PULLUP_EN;
1264 omap_writew(w, UDC_SYSCON1);
1265 if (!gadget_is_otg(&udc->gadget) && !cpu_is_omap15xx()) {
1266 u32 l;
1267
1268 l = omap_readl(OTG_CTRL);
1269 l |= OTG_BSESSVLD;
1270 omap_writel(l, OTG_CTRL);
1271 }
1272 omap_writew(UDC_DS_CHG_IE, UDC_IRQ_EN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001273}
1274
1275static void pullup_disable(struct omap_udc *udc)
1276{
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001277 u16 w;
1278
1279 if (!gadget_is_otg(&udc->gadget) && !cpu_is_omap15xx()) {
1280 u32 l;
1281
1282 l = omap_readl(OTG_CTRL);
1283 l &= ~OTG_BSESSVLD;
1284 omap_writel(l, OTG_CTRL);
1285 }
1286 omap_writew(UDC_DS_CHG_IE, UDC_IRQ_EN);
1287 w = omap_readw(UDC_SYSCON1);
1288 w &= ~UDC_PULLUP_EN;
1289 omap_writew(w, UDC_SYSCON1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290}
1291
David Brownelle6a6e472006-12-10 11:47:04 -08001292static struct omap_udc *udc;
1293
1294static void omap_udc_enable_clock(int enable)
1295{
1296 if (udc == NULL || udc->dc_clk == NULL || udc->hhc_clk == NULL)
1297 return;
1298
1299 if (enable) {
1300 clk_enable(udc->dc_clk);
1301 clk_enable(udc->hhc_clk);
1302 udelay(100);
1303 } else {
1304 clk_disable(udc->hhc_clk);
1305 clk_disable(udc->dc_clk);
1306 }
1307}
1308
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309/*
1310 * Called by whatever detects VBUS sessions: external transceiver
1311 * driver, or maybe GPIO0 VBUS IRQ. May request 48 MHz clock.
1312 */
1313static int omap_vbus_session(struct usb_gadget *gadget, int is_active)
1314{
1315 struct omap_udc *udc;
1316 unsigned long flags;
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001317 u32 l;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318
1319 udc = container_of(gadget, struct omap_udc, gadget);
1320 spin_lock_irqsave(&udc->lock, flags);
1321 VDBG("VBUS %s\n", is_active ? "on" : "off");
1322 udc->vbus_active = (is_active != 0);
1323 if (cpu_is_omap15xx()) {
1324 /* "software" detect, ignored if !VBUS_MODE_1510 */
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001325 l = omap_readl(FUNC_MUX_CTRL_0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001326 if (is_active)
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001327 l |= VBUS_CTRL_1510;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001328 else
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001329 l &= ~VBUS_CTRL_1510;
1330 omap_writel(l, FUNC_MUX_CTRL_0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001331 }
David Brownelle6a6e472006-12-10 11:47:04 -08001332 if (udc->dc_clk != NULL && is_active) {
1333 if (!udc->clk_requested) {
1334 omap_udc_enable_clock(1);
1335 udc->clk_requested = 1;
1336 }
1337 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001338 if (can_pullup(udc))
1339 pullup_enable(udc);
1340 else
1341 pullup_disable(udc);
David Brownelle6a6e472006-12-10 11:47:04 -08001342 if (udc->dc_clk != NULL && !is_active) {
1343 if (udc->clk_requested) {
1344 omap_udc_enable_clock(0);
1345 udc->clk_requested = 0;
1346 }
1347 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348 spin_unlock_irqrestore(&udc->lock, flags);
1349 return 0;
1350}
1351
1352static int omap_vbus_draw(struct usb_gadget *gadget, unsigned mA)
1353{
1354 struct omap_udc *udc;
1355
1356 udc = container_of(gadget, struct omap_udc, gadget);
1357 if (udc->transceiver)
1358 return otg_set_power(udc->transceiver, mA);
1359 return -EOPNOTSUPP;
1360}
1361
1362static int omap_pullup(struct usb_gadget *gadget, int is_on)
1363{
1364 struct omap_udc *udc;
1365 unsigned long flags;
1366
1367 udc = container_of(gadget, struct omap_udc, gadget);
1368 spin_lock_irqsave(&udc->lock, flags);
1369 udc->softconnect = (is_on != 0);
1370 if (can_pullup(udc))
1371 pullup_enable(udc);
1372 else
1373 pullup_disable(udc);
1374 spin_unlock_irqrestore(&udc->lock, flags);
1375 return 0;
1376}
1377
1378static struct usb_gadget_ops omap_gadget_ops = {
1379 .get_frame = omap_get_frame,
1380 .wakeup = omap_wakeup,
1381 .set_selfpowered = omap_set_selfpowered,
1382 .vbus_session = omap_vbus_session,
1383 .vbus_draw = omap_vbus_draw,
1384 .pullup = omap_pullup,
1385};
1386
1387/*-------------------------------------------------------------------------*/
1388
1389/* dequeue ALL requests; caller holds udc->lock */
1390static void nuke(struct omap_ep *ep, int status)
1391{
1392 struct omap_req *req;
1393
1394 ep->stopped = 1;
1395
1396 if (use_dma && ep->dma_channel)
1397 dma_channel_release(ep);
1398
1399 use_ep(ep, 0);
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001400 omap_writew(UDC_CLR_EP, UDC_CTRL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401 if (ep->bEndpointAddress && ep->bmAttributes != USB_ENDPOINT_XFER_ISOC)
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001402 omap_writew(UDC_SET_HALT, UDC_CTRL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001403
1404 while (!list_empty(&ep->queue)) {
1405 req = list_entry(ep->queue.next, struct omap_req, queue);
1406 done(ep, req, status);
1407 }
1408}
1409
1410/* caller holds udc->lock */
1411static void udc_quiesce(struct omap_udc *udc)
1412{
1413 struct omap_ep *ep;
1414
1415 udc->gadget.speed = USB_SPEED_UNKNOWN;
1416 nuke(&udc->ep[0], -ESHUTDOWN);
1417 list_for_each_entry (ep, &udc->gadget.ep_list, ep.ep_list)
1418 nuke(ep, -ESHUTDOWN);
1419}
1420
1421/*-------------------------------------------------------------------------*/
1422
1423static void update_otg(struct omap_udc *udc)
1424{
1425 u16 devstat;
1426
David Brownell9cfbba72007-10-26 13:42:18 -07001427 if (!gadget_is_otg(&udc->gadget))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001428 return;
1429
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001430 if (omap_readl(OTG_CTRL) & OTG_ID)
1431 devstat = omap_readw(UDC_DEVSTAT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001432 else
1433 devstat = 0;
1434
1435 udc->gadget.b_hnp_enable = !!(devstat & UDC_B_HNP_ENABLE);
1436 udc->gadget.a_hnp_support = !!(devstat & UDC_A_HNP_SUPPORT);
1437 udc->gadget.a_alt_hnp_support = !!(devstat & UDC_A_ALT_HNP_SUPPORT);
1438
1439 /* Enable HNP early, avoiding races on suspend irq path.
1440 * ASSUMES OTG state machine B_BUS_REQ input is true.
1441 */
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001442 if (udc->gadget.b_hnp_enable) {
1443 u32 l;
1444
1445 l = omap_readl(OTG_CTRL);
1446 l |= OTG_B_HNPEN | OTG_B_BUSREQ;
1447 l &= ~OTG_PULLUP;
1448 omap_writel(l, OTG_CTRL);
1449 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001450}
1451
1452static void ep0_irq(struct omap_udc *udc, u16 irq_src)
1453{
1454 struct omap_ep *ep0 = &udc->ep[0];
David Brownell313980c2005-04-11 15:38:25 -07001455 struct omap_req *req = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001456
1457 ep0->irqs++;
1458
1459 /* Clear any pending requests and then scrub any rx/tx state
1460 * before starting to handle the SETUP request.
1461 */
1462 if (irq_src & UDC_SETUP) {
1463 u16 ack = irq_src & (UDC_EP0_TX|UDC_EP0_RX);
1464
1465 nuke(ep0, 0);
1466 if (ack) {
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001467 omap_writew(ack, UDC_IRQ_SRC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001468 irq_src = UDC_SETUP;
1469 }
1470 }
1471
David Brownelle6a6e472006-12-10 11:47:04 -08001472 /* IN/OUT packets mean we're in the DATA or STATUS stage.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001473 * This driver uses only uses protocol stalls (ep0 never halts),
1474 * and if we got this far the gadget driver already had a
1475 * chance to stall. Tries to be forgiving of host oddities.
1476 *
1477 * NOTE: the last chance gadget drivers have to stall control
1478 * requests is during their request completion callback.
1479 */
1480 if (!list_empty(&ep0->queue))
1481 req = container_of(ep0->queue.next, struct omap_req, queue);
1482
1483 /* IN == TX to host */
1484 if (irq_src & UDC_EP0_TX) {
1485 int stat;
1486
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001487 omap_writew(UDC_EP0_TX, UDC_IRQ_SRC);
1488 omap_writew(UDC_EP_SEL|UDC_EP_DIR, UDC_EP_NUM);
1489 stat = omap_readw(UDC_STAT_FLG);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001490 if (stat & UDC_ACK) {
1491 if (udc->ep0_in) {
1492 /* write next IN packet from response,
1493 * or set up the status stage.
1494 */
1495 if (req)
1496 stat = write_fifo(ep0, req);
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001497 omap_writew(UDC_EP_DIR, UDC_EP_NUM);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001498 if (!req && udc->ep0_pending) {
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001499 omap_writew(UDC_EP_SEL, UDC_EP_NUM);
1500 omap_writew(UDC_CLR_EP, UDC_CTRL);
1501 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
1502 omap_writew(0, UDC_EP_NUM);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001503 udc->ep0_pending = 0;
1504 } /* else: 6 wait states before it'll tx */
1505 } else {
1506 /* ack status stage of OUT transfer */
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001507 omap_writew(UDC_EP_DIR, UDC_EP_NUM);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001508 if (req)
1509 done(ep0, req, 0);
1510 }
David Brownell313980c2005-04-11 15:38:25 -07001511 req = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001512 } else if (stat & UDC_STALL) {
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001513 omap_writew(UDC_CLR_HALT, UDC_CTRL);
1514 omap_writew(UDC_EP_DIR, UDC_EP_NUM);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515 } else {
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001516 omap_writew(UDC_EP_DIR, UDC_EP_NUM);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001517 }
1518 }
1519
1520 /* OUT == RX from host */
1521 if (irq_src & UDC_EP0_RX) {
1522 int stat;
1523
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001524 omap_writew(UDC_EP0_RX, UDC_IRQ_SRC);
1525 omap_writew(UDC_EP_SEL, UDC_EP_NUM);
1526 stat = omap_readw(UDC_STAT_FLG);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001527 if (stat & UDC_ACK) {
1528 if (!udc->ep0_in) {
1529 stat = 0;
1530 /* read next OUT packet of request, maybe
1531 * reactiviting the fifo; stall on errors.
1532 */
1533 if (!req || (stat = read_fifo(ep0, req)) < 0) {
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001534 omap_writew(UDC_STALL_CMD, UDC_SYSCON2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001535 udc->ep0_pending = 0;
1536 stat = 0;
1537 } else if (stat == 0)
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001538 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
1539 omap_writew(0, UDC_EP_NUM);
David Brownelle6a6e472006-12-10 11:47:04 -08001540
Linus Torvalds1da177e2005-04-16 15:20:36 -07001541 /* activate status stage */
1542 if (stat == 1) {
1543 done(ep0, req, 0);
1544 /* that may have STALLed ep0... */
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001545 omap_writew(UDC_EP_SEL | UDC_EP_DIR,
1546 UDC_EP_NUM);
1547 omap_writew(UDC_CLR_EP, UDC_CTRL);
1548 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
1549 omap_writew(UDC_EP_DIR, UDC_EP_NUM);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001550 udc->ep0_pending = 0;
1551 }
1552 } else {
1553 /* ack status stage of IN transfer */
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001554 omap_writew(0, UDC_EP_NUM);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001555 if (req)
1556 done(ep0, req, 0);
1557 }
1558 } else if (stat & UDC_STALL) {
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001559 omap_writew(UDC_CLR_HALT, UDC_CTRL);
1560 omap_writew(0, UDC_EP_NUM);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001561 } else {
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001562 omap_writew(0, UDC_EP_NUM);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001563 }
1564 }
1565
1566 /* SETUP starts all control transfers */
1567 if (irq_src & UDC_SETUP) {
1568 union u {
1569 u16 word[4];
1570 struct usb_ctrlrequest r;
1571 } u;
1572 int status = -EINVAL;
1573 struct omap_ep *ep;
1574
1575 /* read the (latest) SETUP message */
1576 do {
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001577 omap_writew(UDC_SETUP_SEL, UDC_EP_NUM);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001578 /* two bytes at a time */
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001579 u.word[0] = omap_readw(UDC_DATA);
1580 u.word[1] = omap_readw(UDC_DATA);
1581 u.word[2] = omap_readw(UDC_DATA);
1582 u.word[3] = omap_readw(UDC_DATA);
1583 omap_writew(0, UDC_EP_NUM);
1584 } while (omap_readw(UDC_IRQ_SRC) & UDC_SETUP);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001585
David Brownell01ee7d72007-05-25 20:40:14 -07001586#define w_value le16_to_cpu(u.r.wValue)
1587#define w_index le16_to_cpu(u.r.wIndex)
1588#define w_length le16_to_cpu(u.r.wLength)
David Brownell65111082005-04-28 13:52:31 -07001589
Linus Torvalds1da177e2005-04-16 15:20:36 -07001590 /* Delegate almost all control requests to the gadget driver,
1591 * except for a handful of ch9 status/feature requests that
1592 * hardware doesn't autodecode _and_ the gadget API hides.
1593 */
1594 udc->ep0_in = (u.r.bRequestType & USB_DIR_IN) != 0;
1595 udc->ep0_set_config = 0;
1596 udc->ep0_pending = 1;
1597 ep0->stopped = 0;
1598 ep0->ackwait = 0;
1599 switch (u.r.bRequest) {
1600 case USB_REQ_SET_CONFIGURATION:
1601 /* udc needs to know when ep != 0 is valid */
1602 if (u.r.bRequestType != USB_RECIP_DEVICE)
1603 goto delegate;
David Brownell65111082005-04-28 13:52:31 -07001604 if (w_length != 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001605 goto do_stall;
1606 udc->ep0_set_config = 1;
David Brownell65111082005-04-28 13:52:31 -07001607 udc->ep0_reset_config = (w_value == 0);
1608 VDBG("set config %d\n", w_value);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001609
1610 /* update udc NOW since gadget driver may start
1611 * queueing requests immediately; clear config
1612 * later if it fails the request.
1613 */
1614 if (udc->ep0_reset_config)
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001615 omap_writew(UDC_CLR_CFG, UDC_SYSCON2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001616 else
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001617 omap_writew(UDC_DEV_CFG, UDC_SYSCON2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001618 update_otg(udc);
1619 goto delegate;
1620 case USB_REQ_CLEAR_FEATURE:
1621 /* clear endpoint halt */
1622 if (u.r.bRequestType != USB_RECIP_ENDPOINT)
1623 goto delegate;
David Brownell65111082005-04-28 13:52:31 -07001624 if (w_value != USB_ENDPOINT_HALT
1625 || w_length != 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001626 goto do_stall;
David Brownell65111082005-04-28 13:52:31 -07001627 ep = &udc->ep[w_index & 0xf];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001628 if (ep != ep0) {
David Brownell65111082005-04-28 13:52:31 -07001629 if (w_index & USB_DIR_IN)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001630 ep += 16;
1631 if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC
1632 || !ep->desc)
1633 goto do_stall;
1634 use_ep(ep, 0);
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001635 omap_writew(udc->clr_halt, UDC_CTRL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001636 ep->ackwait = 0;
1637 if (!(ep->bEndpointAddress & USB_DIR_IN)) {
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001638 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001639 ep->ackwait = 1 + ep->double_buf;
1640 }
David Brownell313980c2005-04-11 15:38:25 -07001641 /* NOTE: assumes the host behaves sanely,
1642 * only clearing real halts. Else we may
1643 * need to kill pending transfers and then
1644 * restart the queue... very messy for DMA!
1645 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001646 }
1647 VDBG("%s halt cleared by host\n", ep->name);
1648 goto ep0out_status_stage;
1649 case USB_REQ_SET_FEATURE:
1650 /* set endpoint halt */
1651 if (u.r.bRequestType != USB_RECIP_ENDPOINT)
1652 goto delegate;
David Brownell65111082005-04-28 13:52:31 -07001653 if (w_value != USB_ENDPOINT_HALT
1654 || w_length != 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001655 goto do_stall;
David Brownell65111082005-04-28 13:52:31 -07001656 ep = &udc->ep[w_index & 0xf];
1657 if (w_index & USB_DIR_IN)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001658 ep += 16;
1659 if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC
1660 || ep == ep0 || !ep->desc)
1661 goto do_stall;
1662 if (use_dma && ep->has_dma) {
1663 /* this has rude side-effects (aborts) and
1664 * can't really work if DMA-IN is active
1665 */
1666 DBG("%s host set_halt, NYET \n", ep->name);
1667 goto do_stall;
1668 }
1669 use_ep(ep, 0);
1670 /* can't halt if fifo isn't empty... */
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001671 omap_writew(UDC_CLR_EP, UDC_CTRL);
1672 omap_writew(UDC_SET_HALT, UDC_CTRL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001673 VDBG("%s halted by host\n", ep->name);
1674ep0out_status_stage:
1675 status = 0;
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001676 omap_writew(UDC_EP_SEL|UDC_EP_DIR, UDC_EP_NUM);
1677 omap_writew(UDC_CLR_EP, UDC_CTRL);
1678 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
1679 omap_writew(UDC_EP_DIR, UDC_EP_NUM);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001680 udc->ep0_pending = 0;
1681 break;
1682 case USB_REQ_GET_STATUS:
David Brownell8a3c1f52007-03-21 12:26:32 -07001683 /* USB_ENDPOINT_HALT status? */
1684 if (u.r.bRequestType != (USB_DIR_IN|USB_RECIP_ENDPOINT))
1685 goto intf_status;
1686
1687 /* ep0 never stalls */
1688 if (!(w_index & 0xf))
1689 goto zero_status;
1690
1691 /* only active endpoints count */
1692 ep = &udc->ep[w_index & 0xf];
1693 if (w_index & USB_DIR_IN)
1694 ep += 16;
1695 if (!ep->desc)
1696 goto do_stall;
1697
1698 /* iso never stalls */
1699 if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC)
1700 goto zero_status;
1701
1702 /* FIXME don't assume non-halted endpoints!! */
1703 ERR("%s status, can't report\n", ep->ep.name);
1704 goto do_stall;
1705
1706intf_status:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001707 /* return interface status. if we were pedantic,
1708 * we'd detect non-existent interfaces, and stall.
1709 */
1710 if (u.r.bRequestType
1711 != (USB_DIR_IN|USB_RECIP_INTERFACE))
1712 goto delegate;
David Brownell8a3c1f52007-03-21 12:26:32 -07001713
1714zero_status:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001715 /* return two zero bytes */
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001716 omap_writew(UDC_EP_SEL|UDC_EP_DIR, UDC_EP_NUM);
1717 omap_writew(0, UDC_DATA);
1718 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
1719 omap_writew(UDC_EP_DIR, UDC_EP_NUM);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001720 status = 0;
David Brownell65111082005-04-28 13:52:31 -07001721 VDBG("GET_STATUS, interface %d\n", w_index);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001722 /* next, status stage */
1723 break;
1724 default:
1725delegate:
1726 /* activate the ep0out fifo right away */
David Brownell65111082005-04-28 13:52:31 -07001727 if (!udc->ep0_in && w_length) {
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001728 omap_writew(0, UDC_EP_NUM);
1729 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001730 }
1731
1732 /* gadget drivers see class/vendor specific requests,
1733 * {SET,GET}_{INTERFACE,DESCRIPTOR,CONFIGURATION},
1734 * and more
1735 */
1736 VDBG("SETUP %02x.%02x v%04x i%04x l%04x\n",
1737 u.r.bRequestType, u.r.bRequest,
David Brownell65111082005-04-28 13:52:31 -07001738 w_value, w_index, w_length);
1739
1740#undef w_value
1741#undef w_index
1742#undef w_length
Linus Torvalds1da177e2005-04-16 15:20:36 -07001743
1744 /* The gadget driver may return an error here,
1745 * causing an immediate protocol stall.
1746 *
1747 * Else it must issue a response, either queueing a
1748 * response buffer for the DATA stage, or halting ep0
1749 * (causing a protocol stall, not a real halt). A
1750 * zero length buffer means no DATA stage.
1751 *
1752 * It's fine to issue that response after the setup()
1753 * call returns, and this IRQ was handled.
1754 */
1755 udc->ep0_setup = 1;
1756 spin_unlock(&udc->lock);
1757 status = udc->driver->setup (&udc->gadget, &u.r);
1758 spin_lock(&udc->lock);
1759 udc->ep0_setup = 0;
1760 }
1761
1762 if (status < 0) {
1763do_stall:
1764 VDBG("req %02x.%02x protocol STALL; stat %d\n",
1765 u.r.bRequestType, u.r.bRequest, status);
1766 if (udc->ep0_set_config) {
1767 if (udc->ep0_reset_config)
Arjan van de Venb6c63932008-07-25 01:45:52 -07001768 WARNING("error resetting config?\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001769 else
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001770 omap_writew(UDC_CLR_CFG, UDC_SYSCON2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001771 }
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001772 omap_writew(UDC_STALL_CMD, UDC_SYSCON2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001773 udc->ep0_pending = 0;
1774 }
1775 }
1776}
1777
1778/*-------------------------------------------------------------------------*/
1779
1780#define OTG_FLAGS (UDC_B_HNP_ENABLE|UDC_A_HNP_SUPPORT|UDC_A_ALT_HNP_SUPPORT)
1781
1782static void devstate_irq(struct omap_udc *udc, u16 irq_src)
1783{
1784 u16 devstat, change;
1785
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001786 devstat = omap_readw(UDC_DEVSTAT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001787 change = devstat ^ udc->devstat;
1788 udc->devstat = devstat;
1789
1790 if (change & (UDC_USB_RESET|UDC_ATT)) {
1791 udc_quiesce(udc);
1792
1793 if (change & UDC_ATT) {
1794 /* driver for any external transceiver will
1795 * have called omap_vbus_session() already
1796 */
1797 if (devstat & UDC_ATT) {
1798 udc->gadget.speed = USB_SPEED_FULL;
1799 VDBG("connect\n");
1800 if (!udc->transceiver)
1801 pullup_enable(udc);
1802 // if (driver->connect) call it
1803 } else if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
1804 udc->gadget.speed = USB_SPEED_UNKNOWN;
1805 if (!udc->transceiver)
1806 pullup_disable(udc);
1807 DBG("disconnect, gadget %s\n",
1808 udc->driver->driver.name);
1809 if (udc->driver->disconnect) {
1810 spin_unlock(&udc->lock);
1811 udc->driver->disconnect(&udc->gadget);
1812 spin_lock(&udc->lock);
1813 }
1814 }
1815 change &= ~UDC_ATT;
1816 }
1817
1818 if (change & UDC_USB_RESET) {
1819 if (devstat & UDC_USB_RESET) {
1820 VDBG("RESET=1\n");
1821 } else {
1822 udc->gadget.speed = USB_SPEED_FULL;
1823 INFO("USB reset done, gadget %s\n",
1824 udc->driver->driver.name);
1825 /* ep0 traffic is legal from now on */
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001826 omap_writew(UDC_DS_CHG_IE | UDC_EP0_IE,
1827 UDC_IRQ_EN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001828 }
1829 change &= ~UDC_USB_RESET;
1830 }
1831 }
1832 if (change & UDC_SUS) {
1833 if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
1834 // FIXME tell isp1301 to suspend/resume (?)
1835 if (devstat & UDC_SUS) {
1836 VDBG("suspend\n");
1837 update_otg(udc);
1838 /* HNP could be under way already */
1839 if (udc->gadget.speed == USB_SPEED_FULL
1840 && udc->driver->suspend) {
1841 spin_unlock(&udc->lock);
1842 udc->driver->suspend(&udc->gadget);
1843 spin_lock(&udc->lock);
1844 }
Juha Yrj?l?4e671852005-10-16 15:47:04 -07001845 if (udc->transceiver)
1846 otg_set_suspend(udc->transceiver, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001847 } else {
1848 VDBG("resume\n");
Juha Yrj?l?4e671852005-10-16 15:47:04 -07001849 if (udc->transceiver)
1850 otg_set_suspend(udc->transceiver, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001851 if (udc->gadget.speed == USB_SPEED_FULL
1852 && udc->driver->resume) {
1853 spin_unlock(&udc->lock);
1854 udc->driver->resume(&udc->gadget);
1855 spin_lock(&udc->lock);
1856 }
1857 }
1858 }
1859 change &= ~UDC_SUS;
1860 }
1861 if (!cpu_is_omap15xx() && (change & OTG_FLAGS)) {
1862 update_otg(udc);
1863 change &= ~OTG_FLAGS;
1864 }
1865
1866 change &= ~(UDC_CFG|UDC_DEF|UDC_ADD);
1867 if (change)
1868 VDBG("devstat %03x, ignore change %03x\n",
1869 devstat, change);
1870
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001871 omap_writew(UDC_DS_CHG, UDC_IRQ_SRC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001872}
1873
David Howells7d12e782006-10-05 14:55:46 +01001874static irqreturn_t omap_udc_irq(int irq, void *_udc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001875{
1876 struct omap_udc *udc = _udc;
1877 u16 irq_src;
1878 irqreturn_t status = IRQ_NONE;
1879 unsigned long flags;
1880
1881 spin_lock_irqsave(&udc->lock, flags);
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001882 irq_src = omap_readw(UDC_IRQ_SRC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001883
1884 /* Device state change (usb ch9 stuff) */
1885 if (irq_src & UDC_DS_CHG) {
1886 devstate_irq(_udc, irq_src);
1887 status = IRQ_HANDLED;
1888 irq_src &= ~UDC_DS_CHG;
1889 }
1890
1891 /* EP0 control transfers */
1892 if (irq_src & (UDC_EP0_RX|UDC_SETUP|UDC_EP0_TX)) {
1893 ep0_irq(_udc, irq_src);
1894 status = IRQ_HANDLED;
1895 irq_src &= ~(UDC_EP0_RX|UDC_SETUP|UDC_EP0_TX);
1896 }
1897
1898 /* DMA transfer completion */
1899 if (use_dma && (irq_src & (UDC_TXN_DONE|UDC_RXN_CNT|UDC_RXN_EOT))) {
1900 dma_irq(_udc, irq_src);
1901 status = IRQ_HANDLED;
1902 irq_src &= ~(UDC_TXN_DONE|UDC_RXN_CNT|UDC_RXN_EOT);
1903 }
1904
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001905 irq_src &= ~(UDC_IRQ_SOF | UDC_EPN_TX|UDC_EPN_RX);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001906 if (irq_src)
1907 DBG("udc_irq, unhandled %03x\n", irq_src);
1908 spin_unlock_irqrestore(&udc->lock, flags);
1909
1910 return status;
1911}
1912
1913/* workaround for seemingly-lost IRQs for RX ACKs... */
1914#define PIO_OUT_TIMEOUT (jiffies + HZ/3)
1915#define HALF_FULL(f) (!((f)&(UDC_NON_ISO_FIFO_FULL|UDC_NON_ISO_FIFO_EMPTY)))
1916
1917static void pio_out_timer(unsigned long _ep)
1918{
1919 struct omap_ep *ep = (void *) _ep;
1920 unsigned long flags;
1921 u16 stat_flg;
1922
1923 spin_lock_irqsave(&ep->udc->lock, flags);
1924 if (!list_empty(&ep->queue) && ep->ackwait) {
David Brownelle6a6e472006-12-10 11:47:04 -08001925 use_ep(ep, UDC_EP_SEL);
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001926 stat_flg = omap_readw(UDC_STAT_FLG);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001927
1928 if ((stat_flg & UDC_ACK) && (!(stat_flg & UDC_FIFO_EN)
1929 || (ep->double_buf && HALF_FULL(stat_flg)))) {
1930 struct omap_req *req;
1931
1932 VDBG("%s: lose, %04x\n", ep->ep.name, stat_flg);
1933 req = container_of(ep->queue.next,
1934 struct omap_req, queue);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001935 (void) read_fifo(ep, req);
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001936 omap_writew(ep->bEndpointAddress, UDC_EP_NUM);
1937 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001938 ep->ackwait = 1 + ep->double_buf;
David Brownelle6a6e472006-12-10 11:47:04 -08001939 } else
1940 deselect_ep();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001941 }
1942 mod_timer(&ep->timer, PIO_OUT_TIMEOUT);
1943 spin_unlock_irqrestore(&ep->udc->lock, flags);
1944}
1945
David Howells7d12e782006-10-05 14:55:46 +01001946static irqreturn_t omap_udc_pio_irq(int irq, void *_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001947{
1948 u16 epn_stat, irq_src;
1949 irqreturn_t status = IRQ_NONE;
1950 struct omap_ep *ep;
1951 int epnum;
1952 struct omap_udc *udc = _dev;
1953 struct omap_req *req;
1954 unsigned long flags;
1955
1956 spin_lock_irqsave(&udc->lock, flags);
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001957 epn_stat = omap_readw(UDC_EPN_STAT);
1958 irq_src = omap_readw(UDC_IRQ_SRC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001959
1960 /* handle OUT first, to avoid some wasteful NAKs */
1961 if (irq_src & UDC_EPN_RX) {
1962 epnum = (epn_stat >> 8) & 0x0f;
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001963 omap_writew(UDC_EPN_RX, UDC_IRQ_SRC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001964 status = IRQ_HANDLED;
1965 ep = &udc->ep[epnum];
1966 ep->irqs++;
1967
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001968 omap_writew(epnum | UDC_EP_SEL, UDC_EP_NUM);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001969 ep->fnf = 0;
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001970 if (omap_readw(UDC_STAT_FLG) & UDC_ACK) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001971 ep->ackwait--;
1972 if (!list_empty(&ep->queue)) {
1973 int stat;
1974 req = container_of(ep->queue.next,
1975 struct omap_req, queue);
1976 stat = read_fifo(ep, req);
1977 if (!ep->double_buf)
1978 ep->fnf = 1;
1979 }
1980 }
1981 /* min 6 clock delay before clearing EP_SEL ... */
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001982 epn_stat = omap_readw(UDC_EPN_STAT);
1983 epn_stat = omap_readw(UDC_EPN_STAT);
1984 omap_writew(epnum, UDC_EP_NUM);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001985
1986 /* enabling fifo _after_ clearing ACK, contrary to docs,
1987 * reduces lossage; timer still needed though (sigh).
1988 */
1989 if (ep->fnf) {
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001990 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001991 ep->ackwait = 1 + ep->double_buf;
1992 }
1993 mod_timer(&ep->timer, PIO_OUT_TIMEOUT);
1994 }
1995
1996 /* then IN transfers */
1997 else if (irq_src & UDC_EPN_TX) {
1998 epnum = epn_stat & 0x0f;
Tony Lindgrenf35ae632008-07-03 12:24:43 +03001999 omap_writew(UDC_EPN_TX, UDC_IRQ_SRC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002000 status = IRQ_HANDLED;
2001 ep = &udc->ep[16 + epnum];
2002 ep->irqs++;
2003
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002004 omap_writew(epnum | UDC_EP_DIR | UDC_EP_SEL, UDC_EP_NUM);
2005 if (omap_readw(UDC_STAT_FLG) & UDC_ACK) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002006 ep->ackwait = 0;
2007 if (!list_empty(&ep->queue)) {
2008 req = container_of(ep->queue.next,
2009 struct omap_req, queue);
2010 (void) write_fifo(ep, req);
2011 }
2012 }
2013 /* min 6 clock delay before clearing EP_SEL ... */
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002014 epn_stat = omap_readw(UDC_EPN_STAT);
2015 epn_stat = omap_readw(UDC_EPN_STAT);
2016 omap_writew(epnum | UDC_EP_DIR, UDC_EP_NUM);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002017 /* then 6 clocks before it'd tx */
2018 }
2019
2020 spin_unlock_irqrestore(&udc->lock, flags);
2021 return status;
2022}
2023
2024#ifdef USE_ISO
David Howells7d12e782006-10-05 14:55:46 +01002025static irqreturn_t omap_udc_iso_irq(int irq, void *_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002026{
2027 struct omap_udc *udc = _dev;
2028 struct omap_ep *ep;
2029 int pending = 0;
2030 unsigned long flags;
2031
2032 spin_lock_irqsave(&udc->lock, flags);
2033
2034 /* handle all non-DMA ISO transfers */
2035 list_for_each_entry (ep, &udc->iso, iso) {
2036 u16 stat;
2037 struct omap_req *req;
2038
2039 if (ep->has_dma || list_empty(&ep->queue))
2040 continue;
2041 req = list_entry(ep->queue.next, struct omap_req, queue);
2042
2043 use_ep(ep, UDC_EP_SEL);
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002044 stat = omap_readw(UDC_STAT_FLG);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002045
2046 /* NOTE: like the other controller drivers, this isn't
2047 * currently reporting lost or damaged frames.
2048 */
2049 if (ep->bEndpointAddress & USB_DIR_IN) {
2050 if (stat & UDC_MISS_IN)
2051 /* done(ep, req, -EPROTO) */;
2052 else
2053 write_fifo(ep, req);
2054 } else {
2055 int status = 0;
2056
2057 if (stat & UDC_NO_RXPACKET)
2058 status = -EREMOTEIO;
2059 else if (stat & UDC_ISO_ERR)
2060 status = -EILSEQ;
2061 else if (stat & UDC_DATA_FLUSH)
2062 status = -ENOSR;
2063
2064 if (status)
2065 /* done(ep, req, status) */;
2066 else
2067 read_fifo(ep, req);
2068 }
2069 deselect_ep();
2070 /* 6 wait states before next EP */
2071
2072 ep->irqs++;
2073 if (!list_empty(&ep->queue))
2074 pending = 1;
2075 }
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002076 if (!pending) {
2077 u16 w;
2078
2079 w = omap_readw(UDC_IRQ_EN);
2080 w &= ~UDC_SOF_IE;
2081 omap_writew(w, UDC_IRQ_EN);
2082 }
2083 omap_writew(UDC_IRQ_SOF, UDC_IRQ_SRC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002084
2085 spin_unlock_irqrestore(&udc->lock, flags);
2086 return IRQ_HANDLED;
2087}
2088#endif
2089
2090/*-------------------------------------------------------------------------*/
2091
David Brownell8a3c1f52007-03-21 12:26:32 -07002092static inline int machine_without_vbus_sense(void)
David Brownelle6a6e472006-12-10 11:47:04 -08002093{
2094 return (machine_is_omap_innovator()
2095 || machine_is_omap_osk()
2096 || machine_is_omap_apollon()
2097#ifndef CONFIG_MACH_OMAP_H4_OTG
2098 || machine_is_omap_h4()
2099#endif
2100 || machine_is_sx1()
2101 );
2102}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002103
2104int usb_gadget_register_driver (struct usb_gadget_driver *driver)
2105{
2106 int status = -ENODEV;
2107 struct omap_ep *ep;
2108 unsigned long flags;
2109
2110 /* basic sanity tests */
2111 if (!udc)
2112 return -ENODEV;
2113 if (!driver
2114 // FIXME if otg, check: driver->is_otg
2115 || driver->speed < USB_SPEED_FULL
2116 || !driver->bind
Linus Torvalds1da177e2005-04-16 15:20:36 -07002117 || !driver->setup)
2118 return -EINVAL;
2119
2120 spin_lock_irqsave(&udc->lock, flags);
2121 if (udc->driver) {
2122 spin_unlock_irqrestore(&udc->lock, flags);
2123 return -EBUSY;
2124 }
2125
2126 /* reset state */
2127 list_for_each_entry (ep, &udc->gadget.ep_list, ep.ep_list) {
2128 ep->irqs = 0;
2129 if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC)
2130 continue;
2131 use_ep(ep, 0);
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002132 omap_writew(UDC_SET_HALT, UDC_CTRL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002133 }
2134 udc->ep0_pending = 0;
2135 udc->ep[0].irqs = 0;
2136 udc->softconnect = 1;
2137
2138 /* hook up the driver */
David Brownell313980c2005-04-11 15:38:25 -07002139 driver->driver.bus = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002140 udc->driver = driver;
2141 udc->gadget.dev.driver = &driver->driver;
2142 spin_unlock_irqrestore(&udc->lock, flags);
2143
David Brownelle6a6e472006-12-10 11:47:04 -08002144 if (udc->dc_clk != NULL)
2145 omap_udc_enable_clock(1);
2146
Linus Torvalds1da177e2005-04-16 15:20:36 -07002147 status = driver->bind (&udc->gadget);
2148 if (status) {
2149 DBG("bind to %s --> %d\n", driver->driver.name, status);
David Brownell313980c2005-04-11 15:38:25 -07002150 udc->gadget.dev.driver = NULL;
2151 udc->driver = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002152 goto done;
2153 }
2154 DBG("bound to driver %s\n", driver->driver.name);
2155
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002156 omap_writew(UDC_IRQ_SRC_MASK, UDC_IRQ_SRC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002157
2158 /* connect to bus through transceiver */
2159 if (udc->transceiver) {
2160 status = otg_set_peripheral(udc->transceiver, &udc->gadget);
2161 if (status < 0) {
2162 ERR("can't bind to transceiver\n");
David Brownell6bea4762006-12-05 03:15:33 -08002163 if (driver->unbind) {
2164 driver->unbind (&udc->gadget);
2165 udc->gadget.dev.driver = NULL;
2166 udc->driver = NULL;
2167 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002168 goto done;
2169 }
2170 } else {
2171 if (can_pullup(udc))
2172 pullup_enable (udc);
2173 else
2174 pullup_disable (udc);
2175 }
2176
2177 /* boards that don't have VBUS sensing can't autogate 48MHz;
2178 * can't enter deep sleep while a gadget driver is active.
2179 */
David Brownell8a3c1f52007-03-21 12:26:32 -07002180 if (machine_without_vbus_sense())
Linus Torvalds1da177e2005-04-16 15:20:36 -07002181 omap_vbus_session(&udc->gadget, 1);
2182
2183done:
David Brownelle6a6e472006-12-10 11:47:04 -08002184 if (udc->dc_clk != NULL)
2185 omap_udc_enable_clock(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002186 return status;
2187}
2188EXPORT_SYMBOL(usb_gadget_register_driver);
2189
2190int usb_gadget_unregister_driver (struct usb_gadget_driver *driver)
2191{
2192 unsigned long flags;
2193 int status = -ENODEV;
2194
2195 if (!udc)
2196 return -ENODEV;
David Brownell6bea4762006-12-05 03:15:33 -08002197 if (!driver || driver != udc->driver || !driver->unbind)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002198 return -EINVAL;
2199
David Brownelle6a6e472006-12-10 11:47:04 -08002200 if (udc->dc_clk != NULL)
2201 omap_udc_enable_clock(1);
2202
David Brownell8a3c1f52007-03-21 12:26:32 -07002203 if (machine_without_vbus_sense())
Linus Torvalds1da177e2005-04-16 15:20:36 -07002204 omap_vbus_session(&udc->gadget, 0);
2205
2206 if (udc->transceiver)
David Brownell313980c2005-04-11 15:38:25 -07002207 (void) otg_set_peripheral(udc->transceiver, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002208 else
2209 pullup_disable(udc);
2210
2211 spin_lock_irqsave(&udc->lock, flags);
2212 udc_quiesce(udc);
2213 spin_unlock_irqrestore(&udc->lock, flags);
2214
2215 driver->unbind(&udc->gadget);
David Brownell313980c2005-04-11 15:38:25 -07002216 udc->gadget.dev.driver = NULL;
2217 udc->driver = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002218
David Brownelle6a6e472006-12-10 11:47:04 -08002219 if (udc->dc_clk != NULL)
2220 omap_udc_enable_clock(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002221 DBG("unregistered driver '%s'\n", driver->driver.name);
2222 return status;
2223}
2224EXPORT_SYMBOL(usb_gadget_unregister_driver);
2225
2226
2227/*-------------------------------------------------------------------------*/
2228
2229#ifdef CONFIG_USB_GADGET_DEBUG_FILES
2230
2231#include <linux/seq_file.h>
2232
2233static const char proc_filename[] = "driver/udc";
2234
2235#define FOURBITS "%s%s%s%s"
2236#define EIGHTBITS FOURBITS FOURBITS
2237
2238static void proc_ep_show(struct seq_file *s, struct omap_ep *ep)
2239{
2240 u16 stat_flg;
2241 struct omap_req *req;
2242 char buf[20];
2243
2244 use_ep(ep, 0);
2245
2246 if (use_dma && ep->has_dma)
2247 snprintf(buf, sizeof buf, "(%cxdma%d lch%d) ",
2248 (ep->bEndpointAddress & USB_DIR_IN) ? 't' : 'r',
2249 ep->dma_channel - 1, ep->lch);
2250 else
2251 buf[0] = 0;
2252
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002253 stat_flg = omap_readw(UDC_STAT_FLG);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002254 seq_printf(s,
2255 "\n%s %s%s%sirqs %ld stat %04x " EIGHTBITS FOURBITS "%s\n",
2256 ep->name, buf,
2257 ep->double_buf ? "dbuf " : "",
2258 ({char *s; switch(ep->ackwait){
2259 case 0: s = ""; break;
2260 case 1: s = "(ackw) "; break;
2261 case 2: s = "(ackw2) "; break;
2262 default: s = "(?) "; break;
2263 } s;}),
2264 ep->irqs, stat_flg,
2265 (stat_flg & UDC_NO_RXPACKET) ? "no_rxpacket " : "",
2266 (stat_flg & UDC_MISS_IN) ? "miss_in " : "",
2267 (stat_flg & UDC_DATA_FLUSH) ? "data_flush " : "",
2268 (stat_flg & UDC_ISO_ERR) ? "iso_err " : "",
2269 (stat_flg & UDC_ISO_FIFO_EMPTY) ? "iso_fifo_empty " : "",
2270 (stat_flg & UDC_ISO_FIFO_FULL) ? "iso_fifo_full " : "",
2271 (stat_flg & UDC_EP_HALTED) ? "HALT " : "",
2272 (stat_flg & UDC_STALL) ? "STALL " : "",
2273 (stat_flg & UDC_NAK) ? "NAK " : "",
2274 (stat_flg & UDC_ACK) ? "ACK " : "",
2275 (stat_flg & UDC_FIFO_EN) ? "fifo_en " : "",
2276 (stat_flg & UDC_NON_ISO_FIFO_EMPTY) ? "fifo_empty " : "",
2277 (stat_flg & UDC_NON_ISO_FIFO_FULL) ? "fifo_full " : "");
2278
2279 if (list_empty (&ep->queue))
2280 seq_printf(s, "\t(queue empty)\n");
2281 else
2282 list_for_each_entry (req, &ep->queue, queue) {
2283 unsigned length = req->req.actual;
2284
2285 if (use_dma && buf[0]) {
2286 length += ((ep->bEndpointAddress & USB_DIR_IN)
2287 ? dma_src_len : dma_dest_len)
2288 (ep, req->req.dma + length);
2289 buf[0] = 0;
2290 }
2291 seq_printf(s, "\treq %p len %d/%d buf %p\n",
2292 &req->req, length,
2293 req->req.length, req->req.buf);
2294 }
2295}
2296
2297static char *trx_mode(unsigned m, int enabled)
2298{
2299 switch (m) {
2300 case 0: return enabled ? "*6wire" : "unused";
2301 case 1: return "4wire";
2302 case 2: return "3wire";
David Brownelle6a6e472006-12-10 11:47:04 -08002303 case 3: return "6wire";
Linus Torvalds1da177e2005-04-16 15:20:36 -07002304 default: return "unknown";
2305 }
2306}
2307
2308static int proc_otg_show(struct seq_file *s)
2309{
2310 u32 tmp;
2311 u32 trans;
David Brownelle6a6e472006-12-10 11:47:04 -08002312 char *ctrl_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002313
Dmitry Baryshkove12cc342008-08-07 16:29:25 +04002314 tmp = omap_readl(OTG_REV);
David Brownelle6a6e472006-12-10 11:47:04 -08002315 if (cpu_is_omap24xx()) {
Tony Lindgrenf1c9e152008-09-04 16:25:14 -07002316 /*
2317 * REVISIT: Not clear how this works on OMAP2. trans
2318 * is ANDed to produce bits 7 and 8, which might make
2319 * sense for USB_TRANSCEIVER_CTRL on OMAP1,
2320 * but with CONTROL_DEVCONF, these bits have something to
2321 * do with the frame adjustment counter and McBSP2.
2322 */
David Brownelle6a6e472006-12-10 11:47:04 -08002323 ctrl_name = "control_devconf";
Dmitry Baryshkove12cc342008-08-07 16:29:25 +04002324 trans = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
David Brownelle6a6e472006-12-10 11:47:04 -08002325 } else {
2326 ctrl_name = "tranceiver_ctrl";
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002327 trans = omap_readw(USB_TRANSCEIVER_CTRL);
David Brownelle6a6e472006-12-10 11:47:04 -08002328 }
2329 seq_printf(s, "\nOTG rev %d.%d, %s %05x\n",
2330 tmp >> 4, tmp & 0xf, ctrl_name, trans);
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002331 tmp = omap_readw(OTG_SYSCON_1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002332 seq_printf(s, "otg_syscon1 %08x usb2 %s, usb1 %s, usb0 %s,"
2333 FOURBITS "\n", tmp,
2334 trx_mode(USB2_TRX_MODE(tmp), trans & CONF_USB2_UNI_R),
2335 trx_mode(USB1_TRX_MODE(tmp), trans & CONF_USB1_UNI_R),
David Brownell65111082005-04-28 13:52:31 -07002336 (USB0_TRX_MODE(tmp) == 0 && !cpu_is_omap1710())
Linus Torvalds1da177e2005-04-16 15:20:36 -07002337 ? "internal"
2338 : trx_mode(USB0_TRX_MODE(tmp), 1),
2339 (tmp & OTG_IDLE_EN) ? " !otg" : "",
2340 (tmp & HST_IDLE_EN) ? " !host" : "",
2341 (tmp & DEV_IDLE_EN) ? " !dev" : "",
2342 (tmp & OTG_RESET_DONE) ? " reset_done" : " reset_active");
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002343 tmp = omap_readl(OTG_SYSCON_2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002344 seq_printf(s, "otg_syscon2 %08x%s" EIGHTBITS
2345 " b_ase_brst=%d hmc=%d\n", tmp,
2346 (tmp & OTG_EN) ? " otg_en" : "",
2347 (tmp & USBX_SYNCHRO) ? " synchro" : "",
2348 // much more SRP stuff
2349 (tmp & SRP_DATA) ? " srp_data" : "",
2350 (tmp & SRP_VBUS) ? " srp_vbus" : "",
2351 (tmp & OTG_PADEN) ? " otg_paden" : "",
2352 (tmp & HMC_PADEN) ? " hmc_paden" : "",
2353 (tmp & UHOST_EN) ? " uhost_en" : "",
2354 (tmp & HMC_TLLSPEED) ? " tllspeed" : "",
2355 (tmp & HMC_TLLATTACH) ? " tllattach" : "",
2356 B_ASE_BRST(tmp),
2357 OTG_HMC(tmp));
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002358 tmp = omap_readl(OTG_CTRL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002359 seq_printf(s, "otg_ctrl %06x" EIGHTBITS EIGHTBITS "%s\n", tmp,
2360 (tmp & OTG_ASESSVLD) ? " asess" : "",
2361 (tmp & OTG_BSESSEND) ? " bsess_end" : "",
2362 (tmp & OTG_BSESSVLD) ? " bsess" : "",
2363 (tmp & OTG_VBUSVLD) ? " vbus" : "",
2364 (tmp & OTG_ID) ? " id" : "",
2365 (tmp & OTG_DRIVER_SEL) ? " DEVICE" : " HOST",
2366 (tmp & OTG_A_SETB_HNPEN) ? " a_setb_hnpen" : "",
2367 (tmp & OTG_A_BUSREQ) ? " a_bus" : "",
2368 (tmp & OTG_B_HNPEN) ? " b_hnpen" : "",
2369 (tmp & OTG_B_BUSREQ) ? " b_bus" : "",
2370 (tmp & OTG_BUSDROP) ? " busdrop" : "",
2371 (tmp & OTG_PULLDOWN) ? " down" : "",
2372 (tmp & OTG_PULLUP) ? " up" : "",
2373 (tmp & OTG_DRV_VBUS) ? " drv" : "",
2374 (tmp & OTG_PD_VBUS) ? " pd_vb" : "",
2375 (tmp & OTG_PU_VBUS) ? " pu_vb" : "",
2376 (tmp & OTG_PU_ID) ? " pu_id" : ""
2377 );
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002378 tmp = omap_readw(OTG_IRQ_EN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002379 seq_printf(s, "otg_irq_en %04x" "\n", tmp);
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002380 tmp = omap_readw(OTG_IRQ_SRC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002381 seq_printf(s, "otg_irq_src %04x" "\n", tmp);
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002382 tmp = omap_readw(OTG_OUTCTRL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002383 seq_printf(s, "otg_outctrl %04x" "\n", tmp);
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002384 tmp = omap_readw(OTG_TEST);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002385 seq_printf(s, "otg_test %04x" "\n", tmp);
David Brownell313980c2005-04-11 15:38:25 -07002386 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002387}
2388
2389static int proc_udc_show(struct seq_file *s, void *_)
2390{
2391 u32 tmp;
2392 struct omap_ep *ep;
2393 unsigned long flags;
2394
2395 spin_lock_irqsave(&udc->lock, flags);
2396
2397 seq_printf(s, "%s, version: " DRIVER_VERSION
2398#ifdef USE_ISO
2399 " (iso)"
2400#endif
2401 "%s\n",
2402 driver_desc,
2403 use_dma ? " (dma)" : "");
2404
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002405 tmp = omap_readw(UDC_REV) & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002406 seq_printf(s,
2407 "UDC rev %d.%d, fifo mode %d, gadget %s\n"
2408 "hmc %d, transceiver %s\n",
2409 tmp >> 4, tmp & 0xf,
2410 fifo_mode,
2411 udc->driver ? udc->driver->driver.name : "(none)",
2412 HMC,
David Brownelle6a6e472006-12-10 11:47:04 -08002413 udc->transceiver
2414 ? udc->transceiver->label
2415 : ((cpu_is_omap1710() || cpu_is_omap24xx())
2416 ? "external" : "(none)"));
2417 if (cpu_class_is_omap1()) {
2418 seq_printf(s, "ULPD control %04x req %04x status %04x\n",
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002419 omap_readw(ULPD_CLOCK_CTRL),
2420 omap_readw(ULPD_SOFT_REQ),
2421 omap_readw(ULPD_STATUS_REQ));
David Brownelle6a6e472006-12-10 11:47:04 -08002422 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002423
2424 /* OTG controller registers */
2425 if (!cpu_is_omap15xx())
2426 proc_otg_show(s);
2427
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002428 tmp = omap_readw(UDC_SYSCON1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002429 seq_printf(s, "\nsyscon1 %04x" EIGHTBITS "\n", tmp,
2430 (tmp & UDC_CFG_LOCK) ? " cfg_lock" : "",
2431 (tmp & UDC_DATA_ENDIAN) ? " data_endian" : "",
2432 (tmp & UDC_DMA_ENDIAN) ? " dma_endian" : "",
2433 (tmp & UDC_NAK_EN) ? " nak" : "",
2434 (tmp & UDC_AUTODECODE_DIS) ? " autodecode_dis" : "",
2435 (tmp & UDC_SELF_PWR) ? " self_pwr" : "",
2436 (tmp & UDC_SOFF_DIS) ? " soff_dis" : "",
2437 (tmp & UDC_PULLUP_EN) ? " PULLUP" : "");
2438 // syscon2 is write-only
2439
2440 /* UDC controller registers */
2441 if (!(tmp & UDC_PULLUP_EN)) {
2442 seq_printf(s, "(suspended)\n");
2443 spin_unlock_irqrestore(&udc->lock, flags);
2444 return 0;
2445 }
2446
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002447 tmp = omap_readw(UDC_DEVSTAT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002448 seq_printf(s, "devstat %04x" EIGHTBITS "%s%s\n", tmp,
2449 (tmp & UDC_B_HNP_ENABLE) ? " b_hnp" : "",
2450 (tmp & UDC_A_HNP_SUPPORT) ? " a_hnp" : "",
2451 (tmp & UDC_A_ALT_HNP_SUPPORT) ? " a_alt_hnp" : "",
2452 (tmp & UDC_R_WK_OK) ? " r_wk_ok" : "",
2453 (tmp & UDC_USB_RESET) ? " usb_reset" : "",
2454 (tmp & UDC_SUS) ? " SUS" : "",
2455 (tmp & UDC_CFG) ? " CFG" : "",
2456 (tmp & UDC_ADD) ? " ADD" : "",
2457 (tmp & UDC_DEF) ? " DEF" : "",
2458 (tmp & UDC_ATT) ? " ATT" : "");
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002459 seq_printf(s, "sof %04x\n", omap_readw(UDC_SOF));
2460 tmp = omap_readw(UDC_IRQ_EN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002461 seq_printf(s, "irq_en %04x" FOURBITS "%s\n", tmp,
2462 (tmp & UDC_SOF_IE) ? " sof" : "",
2463 (tmp & UDC_EPN_RX_IE) ? " epn_rx" : "",
2464 (tmp & UDC_EPN_TX_IE) ? " epn_tx" : "",
2465 (tmp & UDC_DS_CHG_IE) ? " ds_chg" : "",
2466 (tmp & UDC_EP0_IE) ? " ep0" : "");
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002467 tmp = omap_readw(UDC_IRQ_SRC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002468 seq_printf(s, "irq_src %04x" EIGHTBITS "%s%s\n", tmp,
2469 (tmp & UDC_TXN_DONE) ? " txn_done" : "",
2470 (tmp & UDC_RXN_CNT) ? " rxn_cnt" : "",
2471 (tmp & UDC_RXN_EOT) ? " rxn_eot" : "",
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002472 (tmp & UDC_IRQ_SOF) ? " sof" : "",
Linus Torvalds1da177e2005-04-16 15:20:36 -07002473 (tmp & UDC_EPN_RX) ? " epn_rx" : "",
2474 (tmp & UDC_EPN_TX) ? " epn_tx" : "",
2475 (tmp & UDC_DS_CHG) ? " ds_chg" : "",
2476 (tmp & UDC_SETUP) ? " setup" : "",
2477 (tmp & UDC_EP0_RX) ? " ep0out" : "",
2478 (tmp & UDC_EP0_TX) ? " ep0in" : "");
2479 if (use_dma) {
2480 unsigned i;
2481
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002482 tmp = omap_readw(UDC_DMA_IRQ_EN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002483 seq_printf(s, "dma_irq_en %04x%s" EIGHTBITS "\n", tmp,
2484 (tmp & UDC_TX_DONE_IE(3)) ? " tx2_done" : "",
2485 (tmp & UDC_RX_CNT_IE(3)) ? " rx2_cnt" : "",
2486 (tmp & UDC_RX_EOT_IE(3)) ? " rx2_eot" : "",
2487
2488 (tmp & UDC_TX_DONE_IE(2)) ? " tx1_done" : "",
2489 (tmp & UDC_RX_CNT_IE(2)) ? " rx1_cnt" : "",
2490 (tmp & UDC_RX_EOT_IE(2)) ? " rx1_eot" : "",
2491
2492 (tmp & UDC_TX_DONE_IE(1)) ? " tx0_done" : "",
2493 (tmp & UDC_RX_CNT_IE(1)) ? " rx0_cnt" : "",
2494 (tmp & UDC_RX_EOT_IE(1)) ? " rx0_eot" : "");
2495
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002496 tmp = omap_readw(UDC_RXDMA_CFG);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002497 seq_printf(s, "rxdma_cfg %04x\n", tmp);
2498 if (tmp) {
2499 for (i = 0; i < 3; i++) {
2500 if ((tmp & (0x0f << (i * 4))) == 0)
2501 continue;
2502 seq_printf(s, "rxdma[%d] %04x\n", i,
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002503 omap_readw(UDC_RXDMA(i + 1)));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002504 }
2505 }
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002506 tmp = omap_readw(UDC_TXDMA_CFG);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002507 seq_printf(s, "txdma_cfg %04x\n", tmp);
2508 if (tmp) {
2509 for (i = 0; i < 3; i++) {
2510 if (!(tmp & (0x0f << (i * 4))))
2511 continue;
2512 seq_printf(s, "txdma[%d] %04x\n", i,
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002513 omap_readw(UDC_TXDMA(i + 1)));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002514 }
2515 }
2516 }
2517
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002518 tmp = omap_readw(UDC_DEVSTAT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002519 if (tmp & UDC_ATT) {
2520 proc_ep_show(s, &udc->ep[0]);
2521 if (tmp & UDC_ADD) {
2522 list_for_each_entry (ep, &udc->gadget.ep_list,
2523 ep.ep_list) {
2524 if (ep->desc)
2525 proc_ep_show(s, ep);
2526 }
2527 }
2528 }
2529 spin_unlock_irqrestore(&udc->lock, flags);
2530 return 0;
2531}
2532
2533static int proc_udc_open(struct inode *inode, struct file *file)
2534{
David Brownell313980c2005-04-11 15:38:25 -07002535 return single_open(file, proc_udc_show, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002536}
2537
Luiz Fernando N. Capitulino066202d2006-08-05 20:37:11 -03002538static const struct file_operations proc_ops = {
Denis V. Lunevcdefa182008-04-29 01:02:19 -07002539 .owner = THIS_MODULE,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002540 .open = proc_udc_open,
2541 .read = seq_read,
2542 .llseek = seq_lseek,
2543 .release = single_release,
2544};
2545
2546static void create_proc_file(void)
2547{
Denis V. Lunevcdefa182008-04-29 01:02:19 -07002548 proc_create(proc_filename, 0, NULL, &proc_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002549}
2550
2551static void remove_proc_file(void)
2552{
David Brownell313980c2005-04-11 15:38:25 -07002553 remove_proc_entry(proc_filename, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002554}
2555
2556#else
2557
2558static inline void create_proc_file(void) {}
2559static inline void remove_proc_file(void) {}
2560
2561#endif
2562
2563/*-------------------------------------------------------------------------*/
2564
2565/* Before this controller can enumerate, we need to pick an endpoint
2566 * configuration, or "fifo_mode" That involves allocating 2KB of packet
2567 * buffer space among the endpoints we'll be operating.
David Brownell65111082005-04-28 13:52:31 -07002568 *
2569 * NOTE: as of OMAP 1710 ES2.0, writing a new endpoint config when
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002570 * UDC_SYSCON_1.CFG_LOCK is set can now work. We won't use that
David Brownell65111082005-04-28 13:52:31 -07002571 * capability yet though.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002572 */
2573static unsigned __init
2574omap_ep_setup(char *name, u8 addr, u8 type,
2575 unsigned buf, unsigned maxp, int dbuf)
2576{
2577 struct omap_ep *ep;
2578 u16 epn_rxtx = 0;
2579
2580 /* OUT endpoints first, then IN */
2581 ep = &udc->ep[addr & 0xf];
2582 if (addr & USB_DIR_IN)
2583 ep += 16;
2584
2585 /* in case of ep init table bugs */
2586 BUG_ON(ep->name[0]);
2587
2588 /* chip setup ... bit values are same for IN, OUT */
2589 if (type == USB_ENDPOINT_XFER_ISOC) {
2590 switch (maxp) {
2591 case 8: epn_rxtx = 0 << 12; break;
2592 case 16: epn_rxtx = 1 << 12; break;
2593 case 32: epn_rxtx = 2 << 12; break;
2594 case 64: epn_rxtx = 3 << 12; break;
2595 case 128: epn_rxtx = 4 << 12; break;
2596 case 256: epn_rxtx = 5 << 12; break;
2597 case 512: epn_rxtx = 6 << 12; break;
2598 default: BUG();
2599 }
2600 epn_rxtx |= UDC_EPN_RX_ISO;
2601 dbuf = 1;
2602 } else {
2603 /* double-buffering "not supported" on 15xx,
David Brownelle6a6e472006-12-10 11:47:04 -08002604 * and ignored for PIO-IN on newer chips
2605 * (for more reliable behavior)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002606 */
David Brownelle6a6e472006-12-10 11:47:04 -08002607 if (!use_dma || cpu_is_omap15xx() || cpu_is_omap24xx())
Linus Torvalds1da177e2005-04-16 15:20:36 -07002608 dbuf = 0;
2609
2610 switch (maxp) {
2611 case 8: epn_rxtx = 0 << 12; break;
2612 case 16: epn_rxtx = 1 << 12; break;
2613 case 32: epn_rxtx = 2 << 12; break;
2614 case 64: epn_rxtx = 3 << 12; break;
2615 default: BUG();
2616 }
2617 if (dbuf && addr)
2618 epn_rxtx |= UDC_EPN_RX_DB;
2619 init_timer(&ep->timer);
2620 ep->timer.function = pio_out_timer;
2621 ep->timer.data = (unsigned long) ep;
2622 }
2623 if (addr)
2624 epn_rxtx |= UDC_EPN_RX_VALID;
2625 BUG_ON(buf & 0x07);
2626 epn_rxtx |= buf >> 3;
2627
2628 DBG("%s addr %02x rxtx %04x maxp %d%s buf %d\n",
2629 name, addr, epn_rxtx, maxp, dbuf ? "x2" : "", buf);
2630
2631 if (addr & USB_DIR_IN)
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002632 omap_writew(epn_rxtx, UDC_EP_TX(addr & 0xf));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002633 else
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002634 omap_writew(epn_rxtx, UDC_EP_RX(addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002635
2636 /* next endpoint's buffer starts after this one's */
2637 buf += maxp;
2638 if (dbuf)
2639 buf += maxp;
2640 BUG_ON(buf > 2048);
2641
2642 /* set up driver data structures */
2643 BUG_ON(strlen(name) >= sizeof ep->name);
2644 strlcpy(ep->name, name, sizeof ep->name);
2645 INIT_LIST_HEAD(&ep->queue);
2646 INIT_LIST_HEAD(&ep->iso);
2647 ep->bEndpointAddress = addr;
2648 ep->bmAttributes = type;
2649 ep->double_buf = dbuf;
David Brownelle6a6e472006-12-10 11:47:04 -08002650 ep->udc = udc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002651
2652 ep->ep.name = ep->name;
2653 ep->ep.ops = &omap_ep_ops;
2654 ep->ep.maxpacket = ep->maxpacket = maxp;
2655 list_add_tail (&ep->ep.ep_list, &udc->gadget.ep_list);
2656
2657 return buf;
2658}
2659
2660static void omap_udc_release(struct device *dev)
2661{
2662 complete(udc->done);
2663 kfree (udc);
David Brownell313980c2005-04-11 15:38:25 -07002664 udc = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002665}
2666
2667static int __init
2668omap_udc_setup(struct platform_device *odev, struct otg_transceiver *xceiv)
2669{
2670 unsigned tmp, buf;
2671
2672 /* abolish any previous hardware state */
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002673 omap_writew(0, UDC_SYSCON1);
2674 omap_writew(0, UDC_IRQ_EN);
2675 omap_writew(UDC_IRQ_SRC_MASK, UDC_IRQ_SRC);
2676 omap_writew(0, UDC_DMA_IRQ_EN);
2677 omap_writew(0, UDC_RXDMA_CFG);
2678 omap_writew(0, UDC_TXDMA_CFG);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002679
2680 /* UDC_PULLUP_EN gates the chip clock */
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002681 // OTG_SYSCON_1 |= DEV_IDLE_EN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002682
Christoph Lametere94b1762006-12-06 20:33:17 -08002683 udc = kzalloc(sizeof(*udc), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002684 if (!udc)
2685 return -ENOMEM;
2686
Linus Torvalds1da177e2005-04-16 15:20:36 -07002687 spin_lock_init (&udc->lock);
2688
2689 udc->gadget.ops = &omap_gadget_ops;
2690 udc->gadget.ep0 = &udc->ep[0].ep;
2691 INIT_LIST_HEAD(&udc->gadget.ep_list);
2692 INIT_LIST_HEAD(&udc->iso);
2693 udc->gadget.speed = USB_SPEED_UNKNOWN;
2694 udc->gadget.name = driver_name;
2695
2696 device_initialize(&udc->gadget.dev);
Kay Sievers0031a062008-05-02 06:02:41 +02002697 dev_set_name(&udc->gadget.dev, "gadget");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002698 udc->gadget.dev.release = omap_udc_release;
2699 udc->gadget.dev.parent = &odev->dev;
2700 if (use_dma)
2701 udc->gadget.dev.dma_mask = odev->dev.dma_mask;
2702
2703 udc->transceiver = xceiv;
2704
2705 /* ep0 is special; put it right after the SETUP buffer */
2706 buf = omap_ep_setup("ep0", 0, USB_ENDPOINT_XFER_CONTROL,
2707 8 /* after SETUP */, 64 /* maxpacket */, 0);
2708 list_del_init(&udc->ep[0].ep.ep_list);
2709
2710 /* initially disable all non-ep0 endpoints */
2711 for (tmp = 1; tmp < 15; tmp++) {
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002712 omap_writew(0, UDC_EP_RX(tmp));
2713 omap_writew(0, UDC_EP_TX(tmp));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002714 }
2715
2716#define OMAP_BULK_EP(name,addr) \
2717 buf = omap_ep_setup(name "-bulk", addr, \
2718 USB_ENDPOINT_XFER_BULK, buf, 64, 1);
2719#define OMAP_INT_EP(name,addr, maxp) \
2720 buf = omap_ep_setup(name "-int", addr, \
2721 USB_ENDPOINT_XFER_INT, buf, maxp, 0);
2722#define OMAP_ISO_EP(name,addr, maxp) \
2723 buf = omap_ep_setup(name "-iso", addr, \
2724 USB_ENDPOINT_XFER_ISOC, buf, maxp, 1);
2725
2726 switch (fifo_mode) {
2727 case 0:
2728 OMAP_BULK_EP("ep1in", USB_DIR_IN | 1);
2729 OMAP_BULK_EP("ep2out", USB_DIR_OUT | 2);
2730 OMAP_INT_EP("ep3in", USB_DIR_IN | 3, 16);
2731 break;
2732 case 1:
2733 OMAP_BULK_EP("ep1in", USB_DIR_IN | 1);
2734 OMAP_BULK_EP("ep2out", USB_DIR_OUT | 2);
David Brownell313980c2005-04-11 15:38:25 -07002735 OMAP_INT_EP("ep9in", USB_DIR_IN | 9, 16);
2736
Linus Torvalds1da177e2005-04-16 15:20:36 -07002737 OMAP_BULK_EP("ep3in", USB_DIR_IN | 3);
2738 OMAP_BULK_EP("ep4out", USB_DIR_OUT | 4);
David Brownell313980c2005-04-11 15:38:25 -07002739 OMAP_INT_EP("ep10in", USB_DIR_IN | 10, 16);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002740
2741 OMAP_BULK_EP("ep5in", USB_DIR_IN | 5);
2742 OMAP_BULK_EP("ep5out", USB_DIR_OUT | 5);
David Brownell313980c2005-04-11 15:38:25 -07002743 OMAP_INT_EP("ep11in", USB_DIR_IN | 11, 16);
2744
Linus Torvalds1da177e2005-04-16 15:20:36 -07002745 OMAP_BULK_EP("ep6in", USB_DIR_IN | 6);
2746 OMAP_BULK_EP("ep6out", USB_DIR_OUT | 6);
David Brownell313980c2005-04-11 15:38:25 -07002747 OMAP_INT_EP("ep12in", USB_DIR_IN | 12, 16);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002748
2749 OMAP_BULK_EP("ep7in", USB_DIR_IN | 7);
2750 OMAP_BULK_EP("ep7out", USB_DIR_OUT | 7);
David Brownell313980c2005-04-11 15:38:25 -07002751 OMAP_INT_EP("ep13in", USB_DIR_IN | 13, 16);
2752 OMAP_INT_EP("ep13out", USB_DIR_OUT | 13, 16);
2753
Linus Torvalds1da177e2005-04-16 15:20:36 -07002754 OMAP_BULK_EP("ep8in", USB_DIR_IN | 8);
2755 OMAP_BULK_EP("ep8out", USB_DIR_OUT | 8);
David Brownell313980c2005-04-11 15:38:25 -07002756 OMAP_INT_EP("ep14in", USB_DIR_IN | 14, 16);
2757 OMAP_INT_EP("ep14out", USB_DIR_OUT | 14, 16);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002758
David Brownell313980c2005-04-11 15:38:25 -07002759 OMAP_BULK_EP("ep15in", USB_DIR_IN | 15);
2760 OMAP_BULK_EP("ep15out", USB_DIR_OUT | 15);
2761
Linus Torvalds1da177e2005-04-16 15:20:36 -07002762 break;
2763
2764#ifdef USE_ISO
2765 case 2: /* mixed iso/bulk */
2766 OMAP_ISO_EP("ep1in", USB_DIR_IN | 1, 256);
2767 OMAP_ISO_EP("ep2out", USB_DIR_OUT | 2, 256);
2768 OMAP_ISO_EP("ep3in", USB_DIR_IN | 3, 128);
2769 OMAP_ISO_EP("ep4out", USB_DIR_OUT | 4, 128);
2770
2771 OMAP_INT_EP("ep5in", USB_DIR_IN | 5, 16);
2772
2773 OMAP_BULK_EP("ep6in", USB_DIR_IN | 6);
2774 OMAP_BULK_EP("ep7out", USB_DIR_OUT | 7);
2775 OMAP_INT_EP("ep8in", USB_DIR_IN | 8, 16);
2776 break;
2777 case 3: /* mixed bulk/iso */
2778 OMAP_BULK_EP("ep1in", USB_DIR_IN | 1);
2779 OMAP_BULK_EP("ep2out", USB_DIR_OUT | 2);
2780 OMAP_INT_EP("ep3in", USB_DIR_IN | 3, 16);
2781
2782 OMAP_BULK_EP("ep4in", USB_DIR_IN | 4);
2783 OMAP_BULK_EP("ep5out", USB_DIR_OUT | 5);
2784 OMAP_INT_EP("ep6in", USB_DIR_IN | 6, 16);
2785
2786 OMAP_ISO_EP("ep7in", USB_DIR_IN | 7, 256);
2787 OMAP_ISO_EP("ep8out", USB_DIR_OUT | 8, 256);
2788 OMAP_INT_EP("ep9in", USB_DIR_IN | 9, 16);
2789 break;
2790#endif
2791
2792 /* add more modes as needed */
2793
2794 default:
2795 ERR("unsupported fifo_mode #%d\n", fifo_mode);
2796 return -ENODEV;
2797 }
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002798 omap_writew(UDC_CFG_LOCK|UDC_SELF_PWR, UDC_SYSCON1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002799 INFO("fifo mode %d, %d bytes not used\n", fifo_mode, 2048 - buf);
2800 return 0;
2801}
2802
Russell King3ae5eae2005-11-09 22:32:44 +00002803static int __init omap_udc_probe(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002804{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002805 int status = -ENODEV;
2806 int hmc;
David Brownell313980c2005-04-11 15:38:25 -07002807 struct otg_transceiver *xceiv = NULL;
2808 const char *type = NULL;
Russell King3ae5eae2005-11-09 22:32:44 +00002809 struct omap_usb_config *config = pdev->dev.platform_data;
David Brownelle6a6e472006-12-10 11:47:04 -08002810 struct clk *dc_clk;
2811 struct clk *hhc_clk;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002812
2813 /* NOTE: "knows" the order of the resources! */
David Brownelle6a6e472006-12-10 11:47:04 -08002814 if (!request_mem_region(pdev->resource[0].start,
Russell King3ae5eae2005-11-09 22:32:44 +00002815 pdev->resource[0].end - pdev->resource[0].start + 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002816 driver_name)) {
2817 DBG("request_mem_region failed\n");
2818 return -EBUSY;
2819 }
2820
David Brownelle6a6e472006-12-10 11:47:04 -08002821 if (cpu_is_omap16xx()) {
2822 dc_clk = clk_get(&pdev->dev, "usb_dc_ck");
2823 hhc_clk = clk_get(&pdev->dev, "usb_hhc_ck");
2824 BUG_ON(IS_ERR(dc_clk) || IS_ERR(hhc_clk));
2825 /* can't use omap_udc_enable_clock yet */
2826 clk_enable(dc_clk);
2827 clk_enable(hhc_clk);
2828 udelay(100);
2829 }
2830
2831 if (cpu_is_omap24xx()) {
2832 dc_clk = clk_get(&pdev->dev, "usb_fck");
2833 hhc_clk = clk_get(&pdev->dev, "usb_l4_ick");
2834 BUG_ON(IS_ERR(dc_clk) || IS_ERR(hhc_clk));
2835 /* can't use omap_udc_enable_clock yet */
2836 clk_enable(dc_clk);
2837 clk_enable(hhc_clk);
2838 udelay(100);
2839 }
2840
Linus Torvalds1da177e2005-04-16 15:20:36 -07002841 INFO("OMAP UDC rev %d.%d%s\n",
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002842 omap_readw(UDC_REV) >> 4, omap_readw(UDC_REV) & 0xf,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002843 config->otg ? ", Mini-AB" : "");
2844
2845 /* use the mode given to us by board init code */
2846 if (cpu_is_omap15xx()) {
2847 hmc = HMC_1510;
2848 type = "(unknown)";
2849
David Brownell8a3c1f52007-03-21 12:26:32 -07002850 if (machine_without_vbus_sense()) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002851 /* just set up software VBUS detect, and then
2852 * later rig it so we always report VBUS.
2853 * FIXME without really sensing VBUS, we can't
2854 * know when to turn PULLUP_EN on/off; and that
2855 * means we always "need" the 48MHz clock.
2856 */
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002857 u32 tmp = omap_readl(FUNC_MUX_CTRL_0);
2858 tmp &= ~VBUS_CTRL_1510;
2859 omap_writel(tmp, FUNC_MUX_CTRL_0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002860 tmp |= VBUS_MODE_1510;
2861 tmp &= ~VBUS_CTRL_1510;
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002862 omap_writel(tmp, FUNC_MUX_CTRL_0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002863 }
2864 } else {
David Brownell65111082005-04-28 13:52:31 -07002865 /* The transceiver may package some GPIO logic or handle
2866 * loopback and/or transceiverless setup; if we find one,
2867 * use it. Except for OTG, we don't _need_ to talk to one;
2868 * but not having one probably means no VBUS detection.
2869 */
2870 xceiv = otg_get_transceiver();
2871 if (xceiv)
2872 type = xceiv->label;
2873 else if (config->otg) {
2874 DBG("OTG requires external transceiver!\n");
2875 goto cleanup0;
2876 }
2877
Linus Torvalds1da177e2005-04-16 15:20:36 -07002878 hmc = HMC_1610;
David Brownelle6a6e472006-12-10 11:47:04 -08002879
2880 if (cpu_is_omap24xx()) {
2881 /* this could be transceiverless in one of the
2882 * "we don't need to know" modes.
2883 */
2884 type = "external";
2885 goto known;
2886 }
2887
Linus Torvalds1da177e2005-04-16 15:20:36 -07002888 switch (hmc) {
David Brownell313980c2005-04-11 15:38:25 -07002889 case 0: /* POWERUP DEFAULT == 0 */
2890 case 4:
2891 case 12:
2892 case 20:
2893 if (!cpu_is_omap1710()) {
2894 type = "integrated";
2895 break;
2896 }
2897 /* FALL THROUGH */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002898 case 3:
2899 case 11:
2900 case 16:
2901 case 19:
2902 case 25:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002903 if (!xceiv) {
2904 DBG("external transceiver not registered!\n");
David Brownell313980c2005-04-11 15:38:25 -07002905 type = "unknown";
David Brownell65111082005-04-28 13:52:31 -07002906 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002907 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002908 case 21: /* internal loopback */
David Brownell313980c2005-04-11 15:38:25 -07002909 type = "loopback";
Linus Torvalds1da177e2005-04-16 15:20:36 -07002910 break;
2911 case 14: /* transceiverless */
David Brownell65111082005-04-28 13:52:31 -07002912 if (cpu_is_omap1710())
2913 goto bad_on_1710;
2914 /* FALL THROUGH */
2915 case 13:
2916 case 15:
David Brownell313980c2005-04-11 15:38:25 -07002917 type = "no";
Linus Torvalds1da177e2005-04-16 15:20:36 -07002918 break;
2919
2920 default:
David Brownell65111082005-04-28 13:52:31 -07002921bad_on_1710:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002922 ERR("unrecognized UDC HMC mode %d\n", hmc);
David Brownell65111082005-04-28 13:52:31 -07002923 goto cleanup0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002924 }
2925 }
David Brownelle6a6e472006-12-10 11:47:04 -08002926known:
David Brownell313980c2005-04-11 15:38:25 -07002927 INFO("hmc mode %d, %s transceiver\n", hmc, type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002928
2929 /* a "gadget" abstracts/virtualizes the controller */
Russell King3ae5eae2005-11-09 22:32:44 +00002930 status = omap_udc_setup(pdev, xceiv);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002931 if (status) {
2932 goto cleanup0;
2933 }
David Brownell313980c2005-04-11 15:38:25 -07002934 xceiv = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002935 // "udc" is now valid
2936 pullup_disable(udc);
2937#if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
2938 udc->gadget.is_otg = (config->otg != 0);
2939#endif
2940
David Brownell65111082005-04-28 13:52:31 -07002941 /* starting with omap1710 es2.0, clear toggle is a separate bit */
Tony Lindgrenf35ae632008-07-03 12:24:43 +03002942 if (omap_readw(UDC_REV) >= 0x61)
David Brownell65111082005-04-28 13:52:31 -07002943 udc->clr_halt = UDC_RESET_EP | UDC_CLRDATA_TOGGLE;
2944 else
2945 udc->clr_halt = UDC_RESET_EP;
2946
Linus Torvalds1da177e2005-04-16 15:20:36 -07002947 /* USB general purpose IRQ: ep0, state changes, dma, etc */
Russell King3ae5eae2005-11-09 22:32:44 +00002948 status = request_irq(pdev->resource[1].start, omap_udc_irq,
Thomas Gleixnerd54b5ca2006-07-01 19:29:44 -07002949 IRQF_SAMPLE_RANDOM, driver_name, udc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002950 if (status != 0) {
David Brownelle6a6e472006-12-10 11:47:04 -08002951 ERR("can't get irq %d, err %d\n",
2952 (int) pdev->resource[1].start, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002953 goto cleanup1;
2954 }
2955
2956 /* USB "non-iso" IRQ (PIO for all but ep0) */
Russell King3ae5eae2005-11-09 22:32:44 +00002957 status = request_irq(pdev->resource[2].start, omap_udc_pio_irq,
Thomas Gleixnerd54b5ca2006-07-01 19:29:44 -07002958 IRQF_SAMPLE_RANDOM, "omap_udc pio", udc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002959 if (status != 0) {
David Brownelle6a6e472006-12-10 11:47:04 -08002960 ERR("can't get irq %d, err %d\n",
2961 (int) pdev->resource[2].start, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002962 goto cleanup2;
2963 }
2964#ifdef USE_ISO
Russell King3ae5eae2005-11-09 22:32:44 +00002965 status = request_irq(pdev->resource[3].start, omap_udc_iso_irq,
Thomas Gleixnerd54b5ca2006-07-01 19:29:44 -07002966 IRQF_DISABLED, "omap_udc iso", udc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002967 if (status != 0) {
David Brownelle6a6e472006-12-10 11:47:04 -08002968 ERR("can't get irq %d, err %d\n",
2969 (int) pdev->resource[3].start, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002970 goto cleanup3;
2971 }
2972#endif
David Brownelle6a6e472006-12-10 11:47:04 -08002973 if (cpu_is_omap16xx()) {
2974 udc->dc_clk = dc_clk;
2975 udc->hhc_clk = hhc_clk;
2976 clk_disable(hhc_clk);
2977 clk_disable(dc_clk);
2978 }
2979
2980 if (cpu_is_omap24xx()) {
2981 udc->dc_clk = dc_clk;
2982 udc->hhc_clk = hhc_clk;
2983 /* FIXME OMAP2 don't release hhc & dc clock */
2984#if 0
2985 clk_disable(hhc_clk);
2986 clk_disable(dc_clk);
2987#endif
2988 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002989
2990 create_proc_file();
David Brownelle6a6e472006-12-10 11:47:04 -08002991 status = device_add(&udc->gadget.dev);
2992 if (!status)
2993 return status;
2994 /* If fail, fall through */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002995#ifdef USE_ISO
2996cleanup3:
Russell King3ae5eae2005-11-09 22:32:44 +00002997 free_irq(pdev->resource[2].start, udc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002998#endif
2999
3000cleanup2:
Russell King3ae5eae2005-11-09 22:32:44 +00003001 free_irq(pdev->resource[1].start, udc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003002
3003cleanup1:
3004 kfree (udc);
David Brownell313980c2005-04-11 15:38:25 -07003005 udc = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003006
3007cleanup0:
3008 if (xceiv)
Philipp Zabel68144e02008-11-24 12:01:17 -08003009 otg_put_transceiver(xceiv);
David Brownelle6a6e472006-12-10 11:47:04 -08003010
3011 if (cpu_is_omap16xx() || cpu_is_omap24xx()) {
3012 clk_disable(hhc_clk);
3013 clk_disable(dc_clk);
3014 clk_put(hhc_clk);
3015 clk_put(dc_clk);
3016 }
3017
Russell King3ae5eae2005-11-09 22:32:44 +00003018 release_mem_region(pdev->resource[0].start,
3019 pdev->resource[0].end - pdev->resource[0].start + 1);
David Brownelle6a6e472006-12-10 11:47:04 -08003020
Linus Torvalds1da177e2005-04-16 15:20:36 -07003021 return status;
3022}
3023
Russell King3ae5eae2005-11-09 22:32:44 +00003024static int __exit omap_udc_remove(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003025{
Peter Zijlstra6e9a4732006-09-30 23:28:10 -07003026 DECLARE_COMPLETION_ONSTACK(done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003027
3028 if (!udc)
3029 return -ENODEV;
David Brownell6bea4762006-12-05 03:15:33 -08003030 if (udc->driver)
3031 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003032
3033 udc->done = &done;
3034
3035 pullup_disable(udc);
3036 if (udc->transceiver) {
Philipp Zabel68144e02008-11-24 12:01:17 -08003037 otg_put_transceiver(udc->transceiver);
David Brownell313980c2005-04-11 15:38:25 -07003038 udc->transceiver = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003039 }
Tony Lindgrenf35ae632008-07-03 12:24:43 +03003040 omap_writew(0, UDC_SYSCON1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003041
3042 remove_proc_file();
3043
3044#ifdef USE_ISO
Russell King3ae5eae2005-11-09 22:32:44 +00003045 free_irq(pdev->resource[3].start, udc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003046#endif
Russell King3ae5eae2005-11-09 22:32:44 +00003047 free_irq(pdev->resource[2].start, udc);
3048 free_irq(pdev->resource[1].start, udc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003049
David Brownelle6a6e472006-12-10 11:47:04 -08003050 if (udc->dc_clk) {
3051 if (udc->clk_requested)
3052 omap_udc_enable_clock(0);
3053 clk_put(udc->hhc_clk);
3054 clk_put(udc->dc_clk);
3055 }
3056
Russell King3ae5eae2005-11-09 22:32:44 +00003057 release_mem_region(pdev->resource[0].start,
3058 pdev->resource[0].end - pdev->resource[0].start + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003059
3060 device_unregister(&udc->gadget.dev);
3061 wait_for_completion(&done);
3062
3063 return 0;
3064}
3065
David Brownell313980c2005-04-11 15:38:25 -07003066/* suspend/resume/wakeup from sysfs (echo > power/state) or when the
3067 * system is forced into deep sleep
3068 *
3069 * REVISIT we should probably reject suspend requests when there's a host
3070 * session active, rather than disconnecting, at least on boards that can
Tony Lindgrenf35ae632008-07-03 12:24:43 +03003071 * report VBUS irqs (UDC_DEVSTAT.UDC_ATT). And in any case, we need to
David Brownell313980c2005-04-11 15:38:25 -07003072 * make host resumes and VBUS detection trigger OMAP wakeup events; that
3073 * may involve talking to an external transceiver (e.g. isp1301).
3074 */
david-b@pacbell.net1d7beee2005-06-29 07:00:56 -07003075
Russell King3ae5eae2005-11-09 22:32:44 +00003076static int omap_udc_suspend(struct platform_device *dev, pm_message_t message)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003077{
David Brownell313980c2005-04-11 15:38:25 -07003078 u32 devstat;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003079
Tony Lindgrenf35ae632008-07-03 12:24:43 +03003080 devstat = omap_readw(UDC_DEVSTAT);
David Brownell313980c2005-04-11 15:38:25 -07003081
3082 /* we're requesting 48 MHz clock if the pullup is enabled
3083 * (== we're attached to the host) and we're not suspended,
3084 * which would prevent entry to deep sleep...
3085 */
3086 if ((devstat & UDC_ATT) != 0 && (devstat & UDC_SUS) == 0) {
Arjan van de Venb6c63932008-07-25 01:45:52 -07003087 WARNING("session active; suspend requires disconnect\n");
David Brownell313980c2005-04-11 15:38:25 -07003088 omap_pullup(&udc->gadget, 0);
3089 }
3090
Linus Torvalds1da177e2005-04-16 15:20:36 -07003091 return 0;
3092}
3093
Russell King3ae5eae2005-11-09 22:32:44 +00003094static int omap_udc_resume(struct platform_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003095{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003096 DBG("resume + wakeup/SRP\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07003097 omap_pullup(&udc->gadget, 1);
3098
3099 /* maybe the host would enumerate us if we nudged it */
3100 msleep(100);
3101 return omap_wakeup(&udc->gadget);
3102}
3103
3104/*-------------------------------------------------------------------------*/
3105
Russell King3ae5eae2005-11-09 22:32:44 +00003106static struct platform_driver udc_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003107 .probe = omap_udc_probe,
3108 .remove = __exit_p(omap_udc_remove),
3109 .suspend = omap_udc_suspend,
3110 .resume = omap_udc_resume,
Russell King3ae5eae2005-11-09 22:32:44 +00003111 .driver = {
3112 .owner = THIS_MODULE,
3113 .name = (char *) driver_name,
3114 },
Linus Torvalds1da177e2005-04-16 15:20:36 -07003115};
3116
3117static int __init udc_init(void)
3118{
3119 INFO("%s, version: " DRIVER_VERSION
3120#ifdef USE_ISO
3121 " (iso)"
3122#endif
3123 "%s\n", driver_desc,
3124 use_dma ? " (dma)" : "");
Russell King3ae5eae2005-11-09 22:32:44 +00003125 return platform_driver_register(&udc_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003126}
3127module_init(udc_init);
3128
3129static void __exit udc_exit(void)
3130{
Russell King3ae5eae2005-11-09 22:32:44 +00003131 platform_driver_unregister(&udc_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003132}
3133module_exit(udc_exit);
3134
3135MODULE_DESCRIPTION(DRIVER_DESC);
3136MODULE_LICENSE("GPL");
Kay Sieversf34c32f2008-04-10 21:29:21 -07003137MODULE_ALIAS("platform:omap_udc");