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[FreeBSD/releng/9.2.git] / sys / dev / usb / controller / atmegadci.c
1 #include <sys/cdefs.h>
2 __FBSDID("$FreeBSD$");
3
4 /*-
5  * Copyright (c) 2009 Hans Petter Selasky. All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  */
28
29 /*
30  * This file contains the driver for the ATMEGA series USB OTG Controller. This
31  * driver currently only supports the DCI mode of the USB hardware.
32  */
33
34 /*
35  * NOTE: When the chip detects BUS-reset it will also reset the
36  * endpoints, Function-address and more.
37  */
38
39 #include <sys/stdint.h>
40 #include <sys/stddef.h>
41 #include <sys/param.h>
42 #include <sys/queue.h>
43 #include <sys/types.h>
44 #include <sys/systm.h>
45 #include <sys/kernel.h>
46 #include <sys/bus.h>
47 #include <sys/module.h>
48 #include <sys/lock.h>
49 #include <sys/mutex.h>
50 #include <sys/condvar.h>
51 #include <sys/sysctl.h>
52 #include <sys/sx.h>
53 #include <sys/unistd.h>
54 #include <sys/callout.h>
55 #include <sys/malloc.h>
56 #include <sys/priv.h>
57
58 #include <dev/usb/usb.h>
59 #include <dev/usb/usbdi.h>
60
61 #define USB_DEBUG_VAR atmegadci_debug
62
63 #include <dev/usb/usb_core.h>
64 #include <dev/usb/usb_debug.h>
65 #include <dev/usb/usb_busdma.h>
66 #include <dev/usb/usb_process.h>
67 #include <dev/usb/usb_transfer.h>
68 #include <dev/usb/usb_device.h>
69 #include <dev/usb/usb_hub.h>
70 #include <dev/usb/usb_util.h>
71
72 #include <dev/usb/usb_controller.h>
73 #include <dev/usb/usb_bus.h>
74 #include <dev/usb/controller/atmegadci.h>
75
76 #define ATMEGA_BUS2SC(bus) \
77    ((struct atmegadci_softc *)(((uint8_t *)(bus)) - \
78     ((uint8_t *)&(((struct atmegadci_softc *)0)->sc_bus))))
79
80 #define ATMEGA_PC2SC(pc) \
81    ATMEGA_BUS2SC(USB_DMATAG_TO_XROOT((pc)->tag_parent)->bus)
82
83 #ifdef USB_DEBUG
84 static int atmegadci_debug = 0;
85
86 static SYSCTL_NODE(_hw_usb, OID_AUTO, atmegadci, CTLFLAG_RW, 0,
87     "USB ATMEGA DCI");
88 SYSCTL_INT(_hw_usb_atmegadci, OID_AUTO, debug, CTLFLAG_RW,
89     &atmegadci_debug, 0, "ATMEGA DCI debug level");
90 #endif
91
92 #define ATMEGA_INTR_ENDPT 1
93
94 /* prototypes */
95
96 struct usb_bus_methods atmegadci_bus_methods;
97 struct usb_pipe_methods atmegadci_device_non_isoc_methods;
98 struct usb_pipe_methods atmegadci_device_isoc_fs_methods;
99
100 static atmegadci_cmd_t atmegadci_setup_rx;
101 static atmegadci_cmd_t atmegadci_data_rx;
102 static atmegadci_cmd_t atmegadci_data_tx;
103 static atmegadci_cmd_t atmegadci_data_tx_sync;
104 static void atmegadci_device_done(struct usb_xfer *, usb_error_t);
105 static void atmegadci_do_poll(struct usb_bus *);
106 static void atmegadci_standard_done(struct usb_xfer *);
107 static void atmegadci_root_intr(struct atmegadci_softc *sc);
108
109 /*
110  * Here is a list of what the chip supports:
111  */
112 static const struct usb_hw_ep_profile
113         atmegadci_ep_profile[2] = {
114
115         [0] = {
116                 .max_in_frame_size = 64,
117                 .max_out_frame_size = 64,
118                 .is_simplex = 1,
119                 .support_control = 1,
120         },
121         [1] = {
122                 .max_in_frame_size = 64,
123                 .max_out_frame_size = 64,
124                 .is_simplex = 1,
125                 .support_bulk = 1,
126                 .support_interrupt = 1,
127                 .support_isochronous = 1,
128                 .support_in = 1,
129                 .support_out = 1,
130         },
131 };
132
133 static void
134 atmegadci_get_hw_ep_profile(struct usb_device *udev,
135     const struct usb_hw_ep_profile **ppf, uint8_t ep_addr)
136 {
137         if (ep_addr == 0)
138                 *ppf = atmegadci_ep_profile;
139         else if (ep_addr < ATMEGA_EP_MAX)
140                 *ppf = atmegadci_ep_profile + 1;
141         else
142                 *ppf = NULL;
143 }
144
145 static void
146 atmegadci_clocks_on(struct atmegadci_softc *sc)
147 {
148         if (sc->sc_flags.clocks_off &&
149             sc->sc_flags.port_powered) {
150
151                 DPRINTFN(5, "\n");
152
153                 /* turn on clocks */
154                 (sc->sc_clocks_on) (&sc->sc_bus);
155
156                 ATMEGA_WRITE_1(sc, ATMEGA_USBCON,
157                     ATMEGA_USBCON_USBE |
158                     ATMEGA_USBCON_OTGPADE |
159                     ATMEGA_USBCON_VBUSTE);
160
161                 sc->sc_flags.clocks_off = 0;
162
163                 /* enable transceiver ? */
164         }
165 }
166
167 static void
168 atmegadci_clocks_off(struct atmegadci_softc *sc)
169 {
170         if (!sc->sc_flags.clocks_off) {
171
172                 DPRINTFN(5, "\n");
173
174                 /* disable Transceiver ? */
175
176                 ATMEGA_WRITE_1(sc, ATMEGA_USBCON,
177                     ATMEGA_USBCON_USBE |
178                     ATMEGA_USBCON_OTGPADE |
179                     ATMEGA_USBCON_FRZCLK |
180                     ATMEGA_USBCON_VBUSTE);
181
182                 /* turn clocks off */
183                 (sc->sc_clocks_off) (&sc->sc_bus);
184
185                 sc->sc_flags.clocks_off = 1;
186         }
187 }
188
189 static void
190 atmegadci_pull_up(struct atmegadci_softc *sc)
191 {
192         /* pullup D+, if possible */
193
194         if (!sc->sc_flags.d_pulled_up &&
195             sc->sc_flags.port_powered) {
196                 sc->sc_flags.d_pulled_up = 1;
197                 ATMEGA_WRITE_1(sc, ATMEGA_UDCON, 0);
198         }
199 }
200
201 static void
202 atmegadci_pull_down(struct atmegadci_softc *sc)
203 {
204         /* pulldown D+, if possible */
205
206         if (sc->sc_flags.d_pulled_up) {
207                 sc->sc_flags.d_pulled_up = 0;
208                 ATMEGA_WRITE_1(sc, ATMEGA_UDCON, ATMEGA_UDCON_DETACH);
209         }
210 }
211
212 static void
213 atmegadci_wakeup_peer(struct atmegadci_softc *sc)
214 {
215         uint8_t temp;
216
217         if (!sc->sc_flags.status_suspend) {
218                 return;
219         }
220
221         temp = ATMEGA_READ_1(sc, ATMEGA_UDCON);
222         ATMEGA_WRITE_1(sc, ATMEGA_UDCON, temp | ATMEGA_UDCON_RMWKUP);
223
224         /* wait 8 milliseconds */
225         /* Wait for reset to complete. */
226         usb_pause_mtx(&sc->sc_bus.bus_mtx, hz / 125);
227
228         /* hardware should have cleared RMWKUP bit */
229 }
230
231 static void
232 atmegadci_set_address(struct atmegadci_softc *sc, uint8_t addr)
233 {
234         DPRINTFN(5, "addr=%d\n", addr);
235
236         addr |= ATMEGA_UDADDR_ADDEN;
237
238         ATMEGA_WRITE_1(sc, ATMEGA_UDADDR, addr);
239 }
240
241 static uint8_t
242 atmegadci_setup_rx(struct atmegadci_td *td)
243 {
244         struct atmegadci_softc *sc;
245         struct usb_device_request req;
246         uint16_t count;
247         uint8_t temp;
248
249         /* get pointer to softc */
250         sc = ATMEGA_PC2SC(td->pc);
251
252         /* select endpoint number */
253         ATMEGA_WRITE_1(sc, ATMEGA_UENUM, td->ep_no);
254
255         /* check endpoint status */
256         temp = ATMEGA_READ_1(sc, ATMEGA_UEINTX);
257
258         DPRINTFN(5, "UEINTX=0x%02x\n", temp);
259
260         if (!(temp & ATMEGA_UEINTX_RXSTPI)) {
261                 goto not_complete;
262         }
263         /* clear did stall */
264         td->did_stall = 0;
265         /* get the packet byte count */
266         count =
267             (ATMEGA_READ_1(sc, ATMEGA_UEBCHX) << 8) |
268             (ATMEGA_READ_1(sc, ATMEGA_UEBCLX));
269
270         /* mask away undefined bits */
271         count &= 0x7FF;
272
273         /* verify data length */
274         if (count != td->remainder) {
275                 DPRINTFN(0, "Invalid SETUP packet "
276                     "length, %d bytes\n", count);
277                 goto not_complete;
278         }
279         if (count != sizeof(req)) {
280                 DPRINTFN(0, "Unsupported SETUP packet "
281                     "length, %d bytes\n", count);
282                 goto not_complete;
283         }
284         /* receive data */
285         ATMEGA_READ_MULTI_1(sc, ATMEGA_UEDATX,
286             (void *)&req, sizeof(req));
287
288         /* copy data into real buffer */
289         usbd_copy_in(td->pc, 0, &req, sizeof(req));
290
291         td->offset = sizeof(req);
292         td->remainder = 0;
293
294         /* sneak peek the set address */
295         if ((req.bmRequestType == UT_WRITE_DEVICE) &&
296             (req.bRequest == UR_SET_ADDRESS)) {
297                 sc->sc_dv_addr = req.wValue[0] & 0x7F;
298                 /* must write address before ZLP */
299                 ATMEGA_WRITE_1(sc, ATMEGA_UDADDR, sc->sc_dv_addr);
300         } else {
301                 sc->sc_dv_addr = 0xFF;
302         }
303
304         /* Clear SETUP packet interrupt and all other previous interrupts */
305         ATMEGA_WRITE_1(sc, ATMEGA_UEINTX, 0);
306         return (0);                     /* complete */
307
308 not_complete:
309         /* abort any ongoing transfer */
310         if (!td->did_stall) {
311                 DPRINTFN(5, "stalling\n");
312                 ATMEGA_WRITE_1(sc, ATMEGA_UECONX,
313                     ATMEGA_UECONX_EPEN |
314                     ATMEGA_UECONX_STALLRQ);
315                 td->did_stall = 1;
316         }
317         if (temp & ATMEGA_UEINTX_RXSTPI) {
318                 /* clear SETUP packet interrupt */
319                 ATMEGA_WRITE_1(sc, ATMEGA_UEINTX, ~ATMEGA_UEINTX_RXSTPI);
320         }
321         /* we only want to know if there is a SETUP packet */
322         ATMEGA_WRITE_1(sc, ATMEGA_UEIENX, ATMEGA_UEIENX_RXSTPE);
323         return (1);                     /* not complete */
324 }
325
326 static uint8_t
327 atmegadci_data_rx(struct atmegadci_td *td)
328 {
329         struct atmegadci_softc *sc;
330         struct usb_page_search buf_res;
331         uint16_t count;
332         uint8_t temp;
333         uint8_t to;
334         uint8_t got_short;
335
336         to = 3;                         /* don't loop forever! */
337         got_short = 0;
338
339         /* get pointer to softc */
340         sc = ATMEGA_PC2SC(td->pc);
341
342         /* select endpoint number */
343         ATMEGA_WRITE_1(sc, ATMEGA_UENUM, td->ep_no);
344
345 repeat:
346         /* check if any of the FIFO banks have data */
347         /* check endpoint status */
348         temp = ATMEGA_READ_1(sc, ATMEGA_UEINTX);
349
350         DPRINTFN(5, "temp=0x%02x rem=%u\n", temp, td->remainder);
351
352         if (temp & ATMEGA_UEINTX_RXSTPI) {
353                 if (td->remainder == 0) {
354                         /*
355                          * We are actually complete and have
356                          * received the next SETUP
357                          */
358                         DPRINTFN(5, "faking complete\n");
359                         return (0);     /* complete */
360                 }
361                 /*
362                  * USB Host Aborted the transfer.
363                  */
364                 td->error = 1;
365                 return (0);             /* complete */
366         }
367         /* check status */
368         if (!(temp & (ATMEGA_UEINTX_FIFOCON |
369             ATMEGA_UEINTX_RXOUTI))) {
370                 /* no data */
371                 goto not_complete;
372         }
373         /* get the packet byte count */
374         count =
375             (ATMEGA_READ_1(sc, ATMEGA_UEBCHX) << 8) |
376             (ATMEGA_READ_1(sc, ATMEGA_UEBCLX));
377
378         /* mask away undefined bits */
379         count &= 0x7FF;
380
381         /* verify the packet byte count */
382         if (count != td->max_packet_size) {
383                 if (count < td->max_packet_size) {
384                         /* we have a short packet */
385                         td->short_pkt = 1;
386                         got_short = 1;
387                 } else {
388                         /* invalid USB packet */
389                         td->error = 1;
390                         return (0);     /* we are complete */
391                 }
392         }
393         /* verify the packet byte count */
394         if (count > td->remainder) {
395                 /* invalid USB packet */
396                 td->error = 1;
397                 return (0);             /* we are complete */
398         }
399         while (count > 0) {
400                 usbd_get_page(td->pc, td->offset, &buf_res);
401
402                 /* get correct length */
403                 if (buf_res.length > count) {
404                         buf_res.length = count;
405                 }
406                 /* receive data */
407                 ATMEGA_READ_MULTI_1(sc, ATMEGA_UEDATX,
408                     buf_res.buffer, buf_res.length);
409
410                 /* update counters */
411                 count -= buf_res.length;
412                 td->offset += buf_res.length;
413                 td->remainder -= buf_res.length;
414         }
415
416         /* clear OUT packet interrupt */
417         ATMEGA_WRITE_1(sc, ATMEGA_UEINTX, ATMEGA_UEINTX_RXOUTI ^ 0xFF);
418
419         /* release FIFO bank */
420         ATMEGA_WRITE_1(sc, ATMEGA_UEINTX, ATMEGA_UEINTX_FIFOCON ^ 0xFF);
421
422         /* check if we are complete */
423         if ((td->remainder == 0) || got_short) {
424                 if (td->short_pkt) {
425                         /* we are complete */
426                         return (0);
427                 }
428                 /* else need to receive a zero length packet */
429         }
430         if (--to) {
431                 goto repeat;
432         }
433 not_complete:
434         /* we only want to know if there is a SETUP packet or OUT packet */
435         ATMEGA_WRITE_1(sc, ATMEGA_UEIENX,
436             ATMEGA_UEIENX_RXSTPE | ATMEGA_UEIENX_RXOUTE);
437         return (1);                     /* not complete */
438 }
439
440 static uint8_t
441 atmegadci_data_tx(struct atmegadci_td *td)
442 {
443         struct atmegadci_softc *sc;
444         struct usb_page_search buf_res;
445         uint16_t count;
446         uint8_t to;
447         uint8_t temp;
448
449         to = 3;                         /* don't loop forever! */
450
451         /* get pointer to softc */
452         sc = ATMEGA_PC2SC(td->pc);
453
454         /* select endpoint number */
455         ATMEGA_WRITE_1(sc, ATMEGA_UENUM, td->ep_no);
456
457 repeat:
458
459         /* check endpoint status */
460         temp = ATMEGA_READ_1(sc, ATMEGA_UEINTX);
461
462         DPRINTFN(5, "temp=0x%02x rem=%u\n", temp, td->remainder);
463
464         if (temp & ATMEGA_UEINTX_RXSTPI) {
465                 /*
466                  * The current transfer was aborted
467                  * by the USB Host
468                  */
469                 td->error = 1;
470                 return (0);             /* complete */
471         }
472
473         temp = ATMEGA_READ_1(sc, ATMEGA_UESTA0X);
474         if (temp & 3) {
475                 /* cannot write any data - a bank is busy */
476                 goto not_complete;
477         }
478
479         count = td->max_packet_size;
480         if (td->remainder < count) {
481                 /* we have a short packet */
482                 td->short_pkt = 1;
483                 count = td->remainder;
484         }
485         while (count > 0) {
486
487                 usbd_get_page(td->pc, td->offset, &buf_res);
488
489                 /* get correct length */
490                 if (buf_res.length > count) {
491                         buf_res.length = count;
492                 }
493                 /* transmit data */
494                 ATMEGA_WRITE_MULTI_1(sc, ATMEGA_UEDATX,
495                     buf_res.buffer, buf_res.length);
496
497                 /* update counters */
498                 count -= buf_res.length;
499                 td->offset += buf_res.length;
500                 td->remainder -= buf_res.length;
501         }
502
503         /* clear IN packet interrupt */
504         ATMEGA_WRITE_1(sc, ATMEGA_UEINTX, 0xFF ^ ATMEGA_UEINTX_TXINI);
505
506         /* allocate FIFO bank */
507         ATMEGA_WRITE_1(sc, ATMEGA_UEINTX, 0xFF ^ ATMEGA_UEINTX_FIFOCON);
508
509         /* check remainder */
510         if (td->remainder == 0) {
511                 if (td->short_pkt) {
512                         return (0);     /* complete */
513                 }
514                 /* else we need to transmit a short packet */
515         }
516         if (--to) {
517                 goto repeat;
518         }
519 not_complete:
520         /* we only want to know if there is a SETUP packet or free IN packet */
521         ATMEGA_WRITE_1(sc, ATMEGA_UEIENX,
522             ATMEGA_UEIENX_RXSTPE | ATMEGA_UEIENX_TXINE);
523         return (1);                     /* not complete */
524 }
525
526 static uint8_t
527 atmegadci_data_tx_sync(struct atmegadci_td *td)
528 {
529         struct atmegadci_softc *sc;
530         uint8_t temp;
531
532         /* get pointer to softc */
533         sc = ATMEGA_PC2SC(td->pc);
534
535         /* select endpoint number */
536         ATMEGA_WRITE_1(sc, ATMEGA_UENUM, td->ep_no);
537
538         /* check endpoint status */
539         temp = ATMEGA_READ_1(sc, ATMEGA_UEINTX);
540
541         DPRINTFN(5, "temp=0x%02x\n", temp);
542
543         if (temp & ATMEGA_UEINTX_RXSTPI) {
544                 DPRINTFN(5, "faking complete\n");
545                 /* Race condition */
546                 return (0);             /* complete */
547         }
548         /*
549          * The control endpoint has only got one bank, so if that bank
550          * is free the packet has been transferred!
551          */
552         temp = ATMEGA_READ_1(sc, ATMEGA_UESTA0X);
553         if (temp & 3) {
554                 /* cannot write any data - a bank is busy */
555                 goto not_complete;
556         }
557         if (sc->sc_dv_addr != 0xFF) {
558                 /* set new address */
559                 atmegadci_set_address(sc, sc->sc_dv_addr);
560         }
561         return (0);                     /* complete */
562
563 not_complete:
564         /* we only want to know if there is a SETUP packet or free IN packet */
565         ATMEGA_WRITE_1(sc, ATMEGA_UEIENX,
566             ATMEGA_UEIENX_RXSTPE | ATMEGA_UEIENX_TXINE);
567         return (1);                     /* not complete */
568 }
569
570 static uint8_t
571 atmegadci_xfer_do_fifo(struct usb_xfer *xfer)
572 {
573         struct atmegadci_td *td;
574
575         DPRINTFN(9, "\n");
576
577         td = xfer->td_transfer_cache;
578         while (1) {
579                 if ((td->func) (td)) {
580                         /* operation in progress */
581                         break;
582                 }
583                 if (((void *)td) == xfer->td_transfer_last) {
584                         goto done;
585                 }
586                 if (td->error) {
587                         goto done;
588                 } else if (td->remainder > 0) {
589                         /*
590                          * We had a short transfer. If there is no alternate
591                          * next, stop processing !
592                          */
593                         if (!td->alt_next) {
594                                 goto done;
595                         }
596                 }
597                 /*
598                  * Fetch the next transfer descriptor and transfer
599                  * some flags to the next transfer descriptor
600                  */
601                 td = td->obj_next;
602                 xfer->td_transfer_cache = td;
603         }
604         return (1);                     /* not complete */
605
606 done:
607         /* compute all actual lengths */
608
609         atmegadci_standard_done(xfer);
610         return (0);                     /* complete */
611 }
612
613 static void
614 atmegadci_interrupt_poll(struct atmegadci_softc *sc)
615 {
616         struct usb_xfer *xfer;
617
618 repeat:
619         TAILQ_FOREACH(xfer, &sc->sc_bus.intr_q.head, wait_entry) {
620                 if (!atmegadci_xfer_do_fifo(xfer)) {
621                         /* queue has been modified */
622                         goto repeat;
623                 }
624         }
625 }
626
627 static void
628 atmegadci_vbus_interrupt(struct atmegadci_softc *sc, uint8_t is_on)
629 {
630         DPRINTFN(5, "vbus = %u\n", is_on);
631
632         if (is_on) {
633                 if (!sc->sc_flags.status_vbus) {
634                         sc->sc_flags.status_vbus = 1;
635
636                         /* complete root HUB interrupt endpoint */
637
638                         atmegadci_root_intr(sc);
639                 }
640         } else {
641                 if (sc->sc_flags.status_vbus) {
642                         sc->sc_flags.status_vbus = 0;
643                         sc->sc_flags.status_bus_reset = 0;
644                         sc->sc_flags.status_suspend = 0;
645                         sc->sc_flags.change_suspend = 0;
646                         sc->sc_flags.change_connect = 1;
647
648                         /* complete root HUB interrupt endpoint */
649
650                         atmegadci_root_intr(sc);
651                 }
652         }
653 }
654
655 void
656 atmegadci_interrupt(struct atmegadci_softc *sc)
657 {
658         uint8_t status;
659
660         USB_BUS_LOCK(&sc->sc_bus);
661
662         /* read interrupt status */
663         status = ATMEGA_READ_1(sc, ATMEGA_UDINT);
664
665         /* clear all set interrupts */
666         ATMEGA_WRITE_1(sc, ATMEGA_UDINT, (~status) & 0x7D);
667
668         DPRINTFN(14, "UDINT=0x%02x\n", status);
669
670         /* check for any bus state change interrupts */
671         if (status & ATMEGA_UDINT_EORSTI) {
672
673                 DPRINTFN(5, "end of reset\n");
674
675                 /* set correct state */
676                 sc->sc_flags.status_bus_reset = 1;
677                 sc->sc_flags.status_suspend = 0;
678                 sc->sc_flags.change_suspend = 0;
679                 sc->sc_flags.change_connect = 1;
680
681                 /* disable resume interrupt */
682                 ATMEGA_WRITE_1(sc, ATMEGA_UDIEN,
683                     ATMEGA_UDINT_SUSPE |
684                     ATMEGA_UDINT_EORSTE);
685
686                 /* complete root HUB interrupt endpoint */
687                 atmegadci_root_intr(sc);
688         }
689         /*
690          * If resume and suspend is set at the same time we interpret
691          * that like RESUME. Resume is set when there is at least 3
692          * milliseconds of inactivity on the USB BUS.
693          */
694         if (status & ATMEGA_UDINT_WAKEUPI) {
695
696                 DPRINTFN(5, "resume interrupt\n");
697
698                 if (sc->sc_flags.status_suspend) {
699                         /* update status bits */
700                         sc->sc_flags.status_suspend = 0;
701                         sc->sc_flags.change_suspend = 1;
702
703                         /* disable resume interrupt */
704                         ATMEGA_WRITE_1(sc, ATMEGA_UDIEN,
705                             ATMEGA_UDINT_SUSPE |
706                             ATMEGA_UDINT_EORSTE);
707
708                         /* complete root HUB interrupt endpoint */
709                         atmegadci_root_intr(sc);
710                 }
711         } else if (status & ATMEGA_UDINT_SUSPI) {
712
713                 DPRINTFN(5, "suspend interrupt\n");
714
715                 if (!sc->sc_flags.status_suspend) {
716                         /* update status bits */
717                         sc->sc_flags.status_suspend = 1;
718                         sc->sc_flags.change_suspend = 1;
719
720                         /* disable suspend interrupt */
721                         ATMEGA_WRITE_1(sc, ATMEGA_UDIEN,
722                             ATMEGA_UDINT_WAKEUPE |
723                             ATMEGA_UDINT_EORSTE);
724
725                         /* complete root HUB interrupt endpoint */
726                         atmegadci_root_intr(sc);
727                 }
728         }
729         /* check VBUS */
730         status = ATMEGA_READ_1(sc, ATMEGA_USBINT);
731
732         /* clear all set interrupts */
733         ATMEGA_WRITE_1(sc, ATMEGA_USBINT, (~status) & 0x03);
734
735         if (status & ATMEGA_USBINT_VBUSTI) {
736                 uint8_t temp;
737
738                 DPRINTFN(5, "USBINT=0x%02x\n", status);
739
740                 temp = ATMEGA_READ_1(sc, ATMEGA_USBSTA);
741                 atmegadci_vbus_interrupt(sc, temp & ATMEGA_USBSTA_VBUS);
742         }
743         /* check for any endpoint interrupts */
744         status = ATMEGA_READ_1(sc, ATMEGA_UEINT);
745         /* the hardware will clear the UEINT bits automatically */
746         if (status) {
747
748                 DPRINTFN(5, "real endpoint interrupt UEINT=0x%02x\n", status);
749
750                 atmegadci_interrupt_poll(sc);
751         }
752         USB_BUS_UNLOCK(&sc->sc_bus);
753 }
754
755 static void
756 atmegadci_setup_standard_chain_sub(struct atmegadci_std_temp *temp)
757 {
758         struct atmegadci_td *td;
759
760         /* get current Transfer Descriptor */
761         td = temp->td_next;
762         temp->td = td;
763
764         /* prepare for next TD */
765         temp->td_next = td->obj_next;
766
767         /* fill out the Transfer Descriptor */
768         td->func = temp->func;
769         td->pc = temp->pc;
770         td->offset = temp->offset;
771         td->remainder = temp->len;
772         td->error = 0;
773         td->did_stall = temp->did_stall;
774         td->short_pkt = temp->short_pkt;
775         td->alt_next = temp->setup_alt_next;
776 }
777
778 static void
779 atmegadci_setup_standard_chain(struct usb_xfer *xfer)
780 {
781         struct atmegadci_std_temp temp;
782         struct atmegadci_softc *sc;
783         struct atmegadci_td *td;
784         uint32_t x;
785         uint8_t ep_no;
786         uint8_t need_sync;
787
788         DPRINTFN(9, "addr=%d endpt=%d sumlen=%d speed=%d\n",
789             xfer->address, UE_GET_ADDR(xfer->endpointno),
790             xfer->sumlen, usbd_get_speed(xfer->xroot->udev));
791
792         temp.max_frame_size = xfer->max_frame_size;
793
794         td = xfer->td_start[0];
795         xfer->td_transfer_first = td;
796         xfer->td_transfer_cache = td;
797
798         /* setup temp */
799
800         temp.pc = NULL;
801         temp.td = NULL;
802         temp.td_next = xfer->td_start[0];
803         temp.offset = 0;
804         temp.setup_alt_next = xfer->flags_int.short_frames_ok;
805         temp.did_stall = !xfer->flags_int.control_stall;
806
807         sc = ATMEGA_BUS2SC(xfer->xroot->bus);
808         ep_no = (xfer->endpointno & UE_ADDR);
809
810         /* check if we should prepend a setup message */
811
812         if (xfer->flags_int.control_xfr) {
813                 if (xfer->flags_int.control_hdr) {
814
815                         temp.func = &atmegadci_setup_rx;
816                         temp.len = xfer->frlengths[0];
817                         temp.pc = xfer->frbuffers + 0;
818                         temp.short_pkt = temp.len ? 1 : 0;
819                         /* check for last frame */
820                         if (xfer->nframes == 1) {
821                                 /* no STATUS stage yet, SETUP is last */
822                                 if (xfer->flags_int.control_act)
823                                         temp.setup_alt_next = 0;
824                         }
825
826                         atmegadci_setup_standard_chain_sub(&temp);
827                 }
828                 x = 1;
829         } else {
830                 x = 0;
831         }
832
833         if (x != xfer->nframes) {
834                 if (xfer->endpointno & UE_DIR_IN) {
835                         temp.func = &atmegadci_data_tx;
836                         need_sync = 1;
837                 } else {
838                         temp.func = &atmegadci_data_rx;
839                         need_sync = 0;
840                 }
841
842                 /* setup "pc" pointer */
843                 temp.pc = xfer->frbuffers + x;
844         } else {
845                 need_sync = 0;
846         }
847         while (x != xfer->nframes) {
848
849                 /* DATA0 / DATA1 message */
850
851                 temp.len = xfer->frlengths[x];
852
853                 x++;
854
855                 if (x == xfer->nframes) {
856                         if (xfer->flags_int.control_xfr) {
857                                 if (xfer->flags_int.control_act) {
858                                         temp.setup_alt_next = 0;
859                                 }
860                         } else {
861                                 temp.setup_alt_next = 0;
862                         }
863                 }
864                 if (temp.len == 0) {
865
866                         /* make sure that we send an USB packet */
867
868                         temp.short_pkt = 0;
869
870                 } else {
871
872                         /* regular data transfer */
873
874                         temp.short_pkt = (xfer->flags.force_short_xfer) ? 0 : 1;
875                 }
876
877                 atmegadci_setup_standard_chain_sub(&temp);
878
879                 if (xfer->flags_int.isochronous_xfr) {
880                         temp.offset += temp.len;
881                 } else {
882                         /* get next Page Cache pointer */
883                         temp.pc = xfer->frbuffers + x;
884                 }
885         }
886
887         if (xfer->flags_int.control_xfr) {
888
889                 /* always setup a valid "pc" pointer for status and sync */
890                 temp.pc = xfer->frbuffers + 0;
891                 temp.len = 0;
892                 temp.short_pkt = 0;
893                 temp.setup_alt_next = 0;
894
895                 /* check if we need to sync */
896                 if (need_sync) {
897                         /* we need a SYNC point after TX */
898                         temp.func = &atmegadci_data_tx_sync;
899                         atmegadci_setup_standard_chain_sub(&temp);
900                 }
901
902                 /* check if we should append a status stage */
903                 if (!xfer->flags_int.control_act) {
904
905                         /*
906                          * Send a DATA1 message and invert the current
907                          * endpoint direction.
908                          */
909                         if (xfer->endpointno & UE_DIR_IN) {
910                                 temp.func = &atmegadci_data_rx;
911                                 need_sync = 0;
912                         } else {
913                                 temp.func = &atmegadci_data_tx;
914                                 need_sync = 1;
915                         }
916
917                         atmegadci_setup_standard_chain_sub(&temp);
918                         if (need_sync) {
919                                 /* we need a SYNC point after TX */
920                                 temp.func = &atmegadci_data_tx_sync;
921                                 atmegadci_setup_standard_chain_sub(&temp);
922                         }
923                 }
924         }
925         /* must have at least one frame! */
926         td = temp.td;
927         xfer->td_transfer_last = td;
928 }
929
930 static void
931 atmegadci_timeout(void *arg)
932 {
933         struct usb_xfer *xfer = arg;
934
935         DPRINTF("xfer=%p\n", xfer);
936
937         USB_BUS_LOCK_ASSERT(xfer->xroot->bus, MA_OWNED);
938
939         /* transfer is transferred */
940         atmegadci_device_done(xfer, USB_ERR_TIMEOUT);
941 }
942
943 static void
944 atmegadci_start_standard_chain(struct usb_xfer *xfer)
945 {
946         DPRINTFN(9, "\n");
947
948         /* poll one time - will turn on interrupts */
949         if (atmegadci_xfer_do_fifo(xfer)) {
950
951                 /* put transfer on interrupt queue */
952                 usbd_transfer_enqueue(&xfer->xroot->bus->intr_q, xfer);
953
954                 /* start timeout, if any */
955                 if (xfer->timeout != 0) {
956                         usbd_transfer_timeout_ms(xfer,
957                             &atmegadci_timeout, xfer->timeout);
958                 }
959         }
960 }
961
962 static void
963 atmegadci_root_intr(struct atmegadci_softc *sc)
964 {
965         DPRINTFN(9, "\n");
966
967         USB_BUS_LOCK_ASSERT(&sc->sc_bus, MA_OWNED);
968
969         /* set port bit */
970         sc->sc_hub_idata[0] = 0x02;     /* we only have one port */
971
972         uhub_root_intr(&sc->sc_bus, sc->sc_hub_idata,
973             sizeof(sc->sc_hub_idata));
974  }
975
976 static usb_error_t
977 atmegadci_standard_done_sub(struct usb_xfer *xfer)
978 {
979         struct atmegadci_td *td;
980         uint32_t len;
981         uint8_t error;
982
983         DPRINTFN(9, "\n");
984
985         td = xfer->td_transfer_cache;
986
987         do {
988                 len = td->remainder;
989
990                 if (xfer->aframes != xfer->nframes) {
991                         /*
992                          * Verify the length and subtract
993                          * the remainder from "frlengths[]":
994                          */
995                         if (len > xfer->frlengths[xfer->aframes]) {
996                                 td->error = 1;
997                         } else {
998                                 xfer->frlengths[xfer->aframes] -= len;
999                         }
1000                 }
1001                 /* Check for transfer error */
1002                 if (td->error) {
1003                         /* the transfer is finished */
1004                         error = 1;
1005                         td = NULL;
1006                         break;
1007                 }
1008                 /* Check for short transfer */
1009                 if (len > 0) {
1010                         if (xfer->flags_int.short_frames_ok) {
1011                                 /* follow alt next */
1012                                 if (td->alt_next) {
1013                                         td = td->obj_next;
1014                                 } else {
1015                                         td = NULL;
1016                                 }
1017                         } else {
1018                                 /* the transfer is finished */
1019                                 td = NULL;
1020                         }
1021                         error = 0;
1022                         break;
1023                 }
1024                 td = td->obj_next;
1025
1026                 /* this USB frame is complete */
1027                 error = 0;
1028                 break;
1029
1030         } while (0);
1031
1032         /* update transfer cache */
1033
1034         xfer->td_transfer_cache = td;
1035
1036         return (error ?
1037             USB_ERR_STALLED : USB_ERR_NORMAL_COMPLETION);
1038 }
1039
1040 static void
1041 atmegadci_standard_done(struct usb_xfer *xfer)
1042 {
1043         usb_error_t err = 0;
1044
1045         DPRINTFN(13, "xfer=%p endpoint=%p transfer done\n",
1046             xfer, xfer->endpoint);
1047
1048         /* reset scanner */
1049
1050         xfer->td_transfer_cache = xfer->td_transfer_first;
1051
1052         if (xfer->flags_int.control_xfr) {
1053
1054                 if (xfer->flags_int.control_hdr) {
1055
1056                         err = atmegadci_standard_done_sub(xfer);
1057                 }
1058                 xfer->aframes = 1;
1059
1060                 if (xfer->td_transfer_cache == NULL) {
1061                         goto done;
1062                 }
1063         }
1064         while (xfer->aframes != xfer->nframes) {
1065
1066                 err = atmegadci_standard_done_sub(xfer);
1067                 xfer->aframes++;
1068
1069                 if (xfer->td_transfer_cache == NULL) {
1070                         goto done;
1071                 }
1072         }
1073
1074         if (xfer->flags_int.control_xfr &&
1075             !xfer->flags_int.control_act) {
1076
1077                 err = atmegadci_standard_done_sub(xfer);
1078         }
1079 done:
1080         atmegadci_device_done(xfer, err);
1081 }
1082
1083 /*------------------------------------------------------------------------*
1084  *      atmegadci_device_done
1085  *
1086  * NOTE: this function can be called more than one time on the
1087  * same USB transfer!
1088  *------------------------------------------------------------------------*/
1089 static void
1090 atmegadci_device_done(struct usb_xfer *xfer, usb_error_t error)
1091 {
1092         struct atmegadci_softc *sc = ATMEGA_BUS2SC(xfer->xroot->bus);
1093         uint8_t ep_no;
1094
1095         USB_BUS_LOCK_ASSERT(&sc->sc_bus, MA_OWNED);
1096
1097         DPRINTFN(9, "xfer=%p, endpoint=%p, error=%d\n",
1098             xfer, xfer->endpoint, error);
1099
1100         if (xfer->flags_int.usb_mode == USB_MODE_DEVICE) {
1101                 ep_no = (xfer->endpointno & UE_ADDR);
1102
1103                 /* select endpoint number */
1104                 ATMEGA_WRITE_1(sc, ATMEGA_UENUM, ep_no);
1105
1106                 /* disable endpoint interrupt */
1107                 ATMEGA_WRITE_1(sc, ATMEGA_UEIENX, 0);
1108
1109                 DPRINTFN(15, "disabled interrupts!\n");
1110         }
1111         /* dequeue transfer and start next transfer */
1112         usbd_transfer_done(xfer, error);
1113 }
1114
1115 static void
1116 atmegadci_set_stall(struct usb_device *udev, struct usb_xfer *xfer,
1117     struct usb_endpoint *ep, uint8_t *did_stall)
1118 {
1119         struct atmegadci_softc *sc;
1120         uint8_t ep_no;
1121
1122         USB_BUS_LOCK_ASSERT(udev->bus, MA_OWNED);
1123
1124         DPRINTFN(5, "endpoint=%p\n", ep);
1125
1126         if (xfer) {
1127                 /* cancel any ongoing transfers */
1128                 atmegadci_device_done(xfer, USB_ERR_STALLED);
1129         }
1130         sc = ATMEGA_BUS2SC(udev->bus);
1131         /* get endpoint number */
1132         ep_no = (ep->edesc->bEndpointAddress & UE_ADDR);
1133         /* select endpoint number */
1134         ATMEGA_WRITE_1(sc, ATMEGA_UENUM, ep_no);
1135         /* set stall */
1136         ATMEGA_WRITE_1(sc, ATMEGA_UECONX,
1137             ATMEGA_UECONX_EPEN |
1138             ATMEGA_UECONX_STALLRQ);
1139 }
1140
1141 static void
1142 atmegadci_clear_stall_sub(struct atmegadci_softc *sc, uint8_t ep_no,
1143     uint8_t ep_type, uint8_t ep_dir)
1144 {
1145         uint8_t temp;
1146
1147         if (ep_type == UE_CONTROL) {
1148                 /* clearing stall is not needed */
1149                 return;
1150         }
1151         /* select endpoint number */
1152         ATMEGA_WRITE_1(sc, ATMEGA_UENUM, ep_no);
1153
1154         /* set endpoint reset */
1155         ATMEGA_WRITE_1(sc, ATMEGA_UERST, ATMEGA_UERST_MASK(ep_no));
1156
1157         /* clear endpoint reset */
1158         ATMEGA_WRITE_1(sc, ATMEGA_UERST, 0);
1159
1160         /* set stall */
1161         ATMEGA_WRITE_1(sc, ATMEGA_UECONX,
1162             ATMEGA_UECONX_EPEN |
1163             ATMEGA_UECONX_STALLRQ);
1164
1165         /* reset data toggle */
1166         ATMEGA_WRITE_1(sc, ATMEGA_UECONX,
1167             ATMEGA_UECONX_EPEN |
1168             ATMEGA_UECONX_RSTDT);
1169
1170         /* clear stall */
1171         ATMEGA_WRITE_1(sc, ATMEGA_UECONX,
1172             ATMEGA_UECONX_EPEN |
1173             ATMEGA_UECONX_STALLRQC);
1174
1175         do {
1176                 if (ep_type == UE_BULK) {
1177                         temp = ATMEGA_UECFG0X_EPTYPE2;
1178                 } else if (ep_type == UE_INTERRUPT) {
1179                         temp = ATMEGA_UECFG0X_EPTYPE3;
1180                 } else {
1181                         temp = ATMEGA_UECFG0X_EPTYPE1;
1182                 }
1183                 if (ep_dir & UE_DIR_IN) {
1184                         temp |= ATMEGA_UECFG0X_EPDIR;
1185                 }
1186                 /* two banks, 64-bytes wMaxPacket */
1187                 ATMEGA_WRITE_1(sc, ATMEGA_UECFG0X, temp);
1188                 ATMEGA_WRITE_1(sc, ATMEGA_UECFG1X,
1189                     ATMEGA_UECFG1X_ALLOC |
1190                     ATMEGA_UECFG1X_EPBK0 |      /* one bank */
1191                     ATMEGA_UECFG1X_EPSIZE(3));
1192
1193                 temp = ATMEGA_READ_1(sc, ATMEGA_UESTA0X);
1194                 if (!(temp & ATMEGA_UESTA0X_CFGOK)) {
1195                         device_printf(sc->sc_bus.bdev,
1196                             "Chip rejected configuration\n");
1197                 }
1198         } while (0);
1199 }
1200
1201 static void
1202 atmegadci_clear_stall(struct usb_device *udev, struct usb_endpoint *ep)
1203 {
1204         struct atmegadci_softc *sc;
1205         struct usb_endpoint_descriptor *ed;
1206
1207         DPRINTFN(5, "endpoint=%p\n", ep);
1208
1209         USB_BUS_LOCK_ASSERT(udev->bus, MA_OWNED);
1210
1211         /* check mode */
1212         if (udev->flags.usb_mode != USB_MODE_DEVICE) {
1213                 /* not supported */
1214                 return;
1215         }
1216         /* get softc */
1217         sc = ATMEGA_BUS2SC(udev->bus);
1218
1219         /* get endpoint descriptor */
1220         ed = ep->edesc;
1221
1222         /* reset endpoint */
1223         atmegadci_clear_stall_sub(sc,
1224             (ed->bEndpointAddress & UE_ADDR),
1225             (ed->bmAttributes & UE_XFERTYPE),
1226             (ed->bEndpointAddress & (UE_DIR_IN | UE_DIR_OUT)));
1227 }
1228
1229 usb_error_t
1230 atmegadci_init(struct atmegadci_softc *sc)
1231 {
1232         uint8_t n;
1233
1234         DPRINTF("start\n");
1235
1236         /* set up the bus structure */
1237         sc->sc_bus.usbrev = USB_REV_1_1;
1238         sc->sc_bus.methods = &atmegadci_bus_methods;
1239
1240         USB_BUS_LOCK(&sc->sc_bus);
1241
1242         /* make sure USB is enabled */
1243         ATMEGA_WRITE_1(sc, ATMEGA_USBCON,
1244             ATMEGA_USBCON_USBE |
1245             ATMEGA_USBCON_FRZCLK);
1246
1247         /* enable USB PAD regulator */
1248         ATMEGA_WRITE_1(sc, ATMEGA_UHWCON,
1249             ATMEGA_UHWCON_UVREGE |
1250             ATMEGA_UHWCON_UIMOD);
1251
1252         /* the following register sets up the USB PLL, assuming 16MHz X-tal */
1253         ATMEGA_WRITE_1(sc, 0x49 /* PLLCSR */, 0x14 | 0x02);
1254
1255         /* wait for PLL to lock */
1256         for (n = 0; n != 20; n++) {
1257                 if (ATMEGA_READ_1(sc, 0x49) & 0x01)
1258                         break;
1259                 /* wait a little bit for PLL to start */
1260                 usb_pause_mtx(&sc->sc_bus.bus_mtx, hz / 100);
1261         }
1262
1263         /* make sure USB is enabled */
1264         ATMEGA_WRITE_1(sc, ATMEGA_USBCON,
1265             ATMEGA_USBCON_USBE |
1266             ATMEGA_USBCON_OTGPADE |
1267             ATMEGA_USBCON_VBUSTE);
1268
1269         /* turn on clocks */
1270         (sc->sc_clocks_on) (&sc->sc_bus);
1271
1272         /* make sure device is re-enumerated */
1273         ATMEGA_WRITE_1(sc, ATMEGA_UDCON, ATMEGA_UDCON_DETACH);
1274
1275         /* wait a little for things to stabilise */
1276         usb_pause_mtx(&sc->sc_bus.bus_mtx, hz / 20);
1277
1278         /* enable interrupts */
1279         ATMEGA_WRITE_1(sc, ATMEGA_UDIEN,
1280             ATMEGA_UDINT_SUSPE |
1281             ATMEGA_UDINT_EORSTE);
1282
1283         /* reset all endpoints */
1284         ATMEGA_WRITE_1(sc, ATMEGA_UERST,
1285             (1 << ATMEGA_EP_MAX) - 1);
1286
1287         /* disable reset */
1288         ATMEGA_WRITE_1(sc, ATMEGA_UERST, 0);
1289
1290         /* disable all endpoints */
1291         for (n = 0; n != ATMEGA_EP_MAX; n++) {
1292
1293                 /* select endpoint */
1294                 ATMEGA_WRITE_1(sc, ATMEGA_UENUM, n);
1295
1296                 /* disable endpoint interrupt */
1297                 ATMEGA_WRITE_1(sc, ATMEGA_UEIENX, 0);
1298
1299                 /* disable endpoint */
1300                 ATMEGA_WRITE_1(sc, ATMEGA_UECONX, 0);
1301         }
1302
1303         /* turn off clocks */
1304
1305         atmegadci_clocks_off(sc);
1306
1307         /* read initial VBUS state */
1308
1309         n = ATMEGA_READ_1(sc, ATMEGA_USBSTA);
1310         atmegadci_vbus_interrupt(sc, n & ATMEGA_USBSTA_VBUS);
1311
1312         USB_BUS_UNLOCK(&sc->sc_bus);
1313
1314         /* catch any lost interrupts */
1315
1316         atmegadci_do_poll(&sc->sc_bus);
1317
1318         return (0);                     /* success */
1319 }
1320
1321 void
1322 atmegadci_uninit(struct atmegadci_softc *sc)
1323 {
1324         USB_BUS_LOCK(&sc->sc_bus);
1325
1326         /* turn on clocks */
1327         (sc->sc_clocks_on) (&sc->sc_bus);
1328
1329         /* disable interrupts */
1330         ATMEGA_WRITE_1(sc, ATMEGA_UDIEN, 0);
1331
1332         /* reset all endpoints */
1333         ATMEGA_WRITE_1(sc, ATMEGA_UERST,
1334             (1 << ATMEGA_EP_MAX) - 1);
1335
1336         /* disable reset */
1337         ATMEGA_WRITE_1(sc, ATMEGA_UERST, 0);
1338
1339         sc->sc_flags.port_powered = 0;
1340         sc->sc_flags.status_vbus = 0;
1341         sc->sc_flags.status_bus_reset = 0;
1342         sc->sc_flags.status_suspend = 0;
1343         sc->sc_flags.change_suspend = 0;
1344         sc->sc_flags.change_connect = 1;
1345
1346         atmegadci_pull_down(sc);
1347         atmegadci_clocks_off(sc);
1348
1349         /* disable USB PAD regulator */
1350         ATMEGA_WRITE_1(sc, ATMEGA_UHWCON, 0);
1351
1352         USB_BUS_UNLOCK(&sc->sc_bus);
1353 }
1354
1355 static void
1356 atmegadci_suspend(struct atmegadci_softc *sc)
1357 {
1358         /* TODO */
1359 }
1360
1361 static void
1362 atmegadci_resume(struct atmegadci_softc *sc)
1363 {
1364         /* TODO */
1365 }
1366
1367 static void
1368 atmegadci_do_poll(struct usb_bus *bus)
1369 {
1370         struct atmegadci_softc *sc = ATMEGA_BUS2SC(bus);
1371
1372         USB_BUS_LOCK(&sc->sc_bus);
1373         atmegadci_interrupt_poll(sc);
1374         USB_BUS_UNLOCK(&sc->sc_bus);
1375 }
1376
1377 /*------------------------------------------------------------------------*
1378  * at91dci bulk support
1379  * at91dci control support
1380  * at91dci interrupt support
1381  *------------------------------------------------------------------------*/
1382 static void
1383 atmegadci_device_non_isoc_open(struct usb_xfer *xfer)
1384 {
1385         return;
1386 }
1387
1388 static void
1389 atmegadci_device_non_isoc_close(struct usb_xfer *xfer)
1390 {
1391         atmegadci_device_done(xfer, USB_ERR_CANCELLED);
1392 }
1393
1394 static void
1395 atmegadci_device_non_isoc_enter(struct usb_xfer *xfer)
1396 {
1397         return;
1398 }
1399
1400 static void
1401 atmegadci_device_non_isoc_start(struct usb_xfer *xfer)
1402 {
1403         /* setup TDs */
1404         atmegadci_setup_standard_chain(xfer);
1405         atmegadci_start_standard_chain(xfer);
1406 }
1407
1408 struct usb_pipe_methods atmegadci_device_non_isoc_methods =
1409 {
1410         .open = atmegadci_device_non_isoc_open,
1411         .close = atmegadci_device_non_isoc_close,
1412         .enter = atmegadci_device_non_isoc_enter,
1413         .start = atmegadci_device_non_isoc_start,
1414 };
1415
1416 /*------------------------------------------------------------------------*
1417  * at91dci full speed isochronous support
1418  *------------------------------------------------------------------------*/
1419 static void
1420 atmegadci_device_isoc_fs_open(struct usb_xfer *xfer)
1421 {
1422         return;
1423 }
1424
1425 static void
1426 atmegadci_device_isoc_fs_close(struct usb_xfer *xfer)
1427 {
1428         atmegadci_device_done(xfer, USB_ERR_CANCELLED);
1429 }
1430
1431 static void
1432 atmegadci_device_isoc_fs_enter(struct usb_xfer *xfer)
1433 {
1434         struct atmegadci_softc *sc = ATMEGA_BUS2SC(xfer->xroot->bus);
1435         uint32_t temp;
1436         uint32_t nframes;
1437
1438         DPRINTFN(6, "xfer=%p next=%d nframes=%d\n",
1439             xfer, xfer->endpoint->isoc_next, xfer->nframes);
1440
1441         /* get the current frame index */
1442
1443         nframes =
1444             (ATMEGA_READ_1(sc, ATMEGA_UDFNUMH) << 8) |
1445             (ATMEGA_READ_1(sc, ATMEGA_UDFNUML));
1446
1447         nframes &= ATMEGA_FRAME_MASK;
1448
1449         /*
1450          * check if the frame index is within the window where the frames
1451          * will be inserted
1452          */
1453         temp = (nframes - xfer->endpoint->isoc_next) & ATMEGA_FRAME_MASK;
1454
1455         if ((xfer->endpoint->is_synced == 0) ||
1456             (temp < xfer->nframes)) {
1457                 /*
1458                  * If there is data underflow or the pipe queue is
1459                  * empty we schedule the transfer a few frames ahead
1460                  * of the current frame position. Else two isochronous
1461                  * transfers might overlap.
1462                  */
1463                 xfer->endpoint->isoc_next = (nframes + 3) & ATMEGA_FRAME_MASK;
1464                 xfer->endpoint->is_synced = 1;
1465                 DPRINTFN(3, "start next=%d\n", xfer->endpoint->isoc_next);
1466         }
1467         /*
1468          * compute how many milliseconds the insertion is ahead of the
1469          * current frame position:
1470          */
1471         temp = (xfer->endpoint->isoc_next - nframes) & ATMEGA_FRAME_MASK;
1472
1473         /*
1474          * pre-compute when the isochronous transfer will be finished:
1475          */
1476         xfer->isoc_time_complete =
1477             usb_isoc_time_expand(&sc->sc_bus, nframes) + temp +
1478             xfer->nframes;
1479
1480         /* compute frame number for next insertion */
1481         xfer->endpoint->isoc_next += xfer->nframes;
1482
1483         /* setup TDs */
1484         atmegadci_setup_standard_chain(xfer);
1485 }
1486
1487 static void
1488 atmegadci_device_isoc_fs_start(struct usb_xfer *xfer)
1489 {
1490         /* start TD chain */
1491         atmegadci_start_standard_chain(xfer);
1492 }
1493
1494 struct usb_pipe_methods atmegadci_device_isoc_fs_methods =
1495 {
1496         .open = atmegadci_device_isoc_fs_open,
1497         .close = atmegadci_device_isoc_fs_close,
1498         .enter = atmegadci_device_isoc_fs_enter,
1499         .start = atmegadci_device_isoc_fs_start,
1500 };
1501
1502 /*------------------------------------------------------------------------*
1503  * at91dci root control support
1504  *------------------------------------------------------------------------*
1505  * Simulate a hardware HUB by handling all the necessary requests.
1506  *------------------------------------------------------------------------*/
1507
1508 static const struct usb_device_descriptor atmegadci_devd = {
1509         .bLength = sizeof(struct usb_device_descriptor),
1510         .bDescriptorType = UDESC_DEVICE,
1511         .bcdUSB = {0x00, 0x02},
1512         .bDeviceClass = UDCLASS_HUB,
1513         .bDeviceSubClass = UDSUBCLASS_HUB,
1514         .bDeviceProtocol = UDPROTO_FSHUB,
1515         .bMaxPacketSize = 64,
1516         .bcdDevice = {0x00, 0x01},
1517         .iManufacturer = 1,
1518         .iProduct = 2,
1519         .bNumConfigurations = 1,
1520 };
1521
1522 static const struct atmegadci_config_desc atmegadci_confd = {
1523         .confd = {
1524                 .bLength = sizeof(struct usb_config_descriptor),
1525                 .bDescriptorType = UDESC_CONFIG,
1526                 .wTotalLength[0] = sizeof(atmegadci_confd),
1527                 .bNumInterface = 1,
1528                 .bConfigurationValue = 1,
1529                 .iConfiguration = 0,
1530                 .bmAttributes = UC_SELF_POWERED,
1531                 .bMaxPower = 0,
1532         },
1533         .ifcd = {
1534                 .bLength = sizeof(struct usb_interface_descriptor),
1535                 .bDescriptorType = UDESC_INTERFACE,
1536                 .bNumEndpoints = 1,
1537                 .bInterfaceClass = UICLASS_HUB,
1538                 .bInterfaceSubClass = UISUBCLASS_HUB,
1539                 .bInterfaceProtocol = 0,
1540         },
1541         .endpd = {
1542                 .bLength = sizeof(struct usb_endpoint_descriptor),
1543                 .bDescriptorType = UDESC_ENDPOINT,
1544                 .bEndpointAddress = (UE_DIR_IN | ATMEGA_INTR_ENDPT),
1545                 .bmAttributes = UE_INTERRUPT,
1546                 .wMaxPacketSize[0] = 8,
1547                 .bInterval = 255,
1548         },
1549 };
1550
1551 #define HSETW(ptr, val) ptr = { (uint8_t)(val), (uint8_t)((val) >> 8) }
1552
1553 static const struct usb_hub_descriptor_min atmegadci_hubd = {
1554         .bDescLength = sizeof(atmegadci_hubd),
1555         .bDescriptorType = UDESC_HUB,
1556         .bNbrPorts = 1,
1557         HSETW(.wHubCharacteristics, (UHD_PWR_NO_SWITCH | UHD_OC_INDIVIDUAL)),
1558         .bPwrOn2PwrGood = 50,
1559         .bHubContrCurrent = 0,
1560         .DeviceRemovable = {0},         /* port is removable */
1561 };
1562
1563 #define STRING_LANG \
1564   0x09, 0x04,                           /* American English */
1565
1566 #define STRING_VENDOR \
1567   'A', 0, 'T', 0, 'M', 0, 'E', 0, 'G', 0, 'A', 0
1568
1569 #define STRING_PRODUCT \
1570   'D', 0, 'C', 0, 'I', 0, ' ', 0, 'R', 0, \
1571   'o', 0, 'o', 0, 't', 0, ' ', 0, 'H', 0, \
1572   'U', 0, 'B', 0,
1573
1574 USB_MAKE_STRING_DESC(STRING_LANG, atmegadci_langtab);
1575 USB_MAKE_STRING_DESC(STRING_VENDOR, atmegadci_vendor);
1576 USB_MAKE_STRING_DESC(STRING_PRODUCT, atmegadci_product);
1577
1578 static usb_error_t
1579 atmegadci_roothub_exec(struct usb_device *udev,
1580     struct usb_device_request *req, const void **pptr, uint16_t *plength)
1581 {
1582         struct atmegadci_softc *sc = ATMEGA_BUS2SC(udev->bus);
1583         const void *ptr;
1584         uint16_t len;
1585         uint16_t value;
1586         uint16_t index;
1587         uint8_t temp;
1588         usb_error_t err;
1589
1590         USB_BUS_LOCK_ASSERT(&sc->sc_bus, MA_OWNED);
1591
1592         /* buffer reset */
1593         ptr = (const void *)&sc->sc_hub_temp;
1594         len = 0;
1595         err = 0;
1596
1597         value = UGETW(req->wValue);
1598         index = UGETW(req->wIndex);
1599
1600         /* demultiplex the control request */
1601
1602         switch (req->bmRequestType) {
1603         case UT_READ_DEVICE:
1604                 switch (req->bRequest) {
1605                 case UR_GET_DESCRIPTOR:
1606                         goto tr_handle_get_descriptor;
1607                 case UR_GET_CONFIG:
1608                         goto tr_handle_get_config;
1609                 case UR_GET_STATUS:
1610                         goto tr_handle_get_status;
1611                 default:
1612                         goto tr_stalled;
1613                 }
1614                 break;
1615
1616         case UT_WRITE_DEVICE:
1617                 switch (req->bRequest) {
1618                 case UR_SET_ADDRESS:
1619                         goto tr_handle_set_address;
1620                 case UR_SET_CONFIG:
1621                         goto tr_handle_set_config;
1622                 case UR_CLEAR_FEATURE:
1623                         goto tr_valid;  /* nop */
1624                 case UR_SET_DESCRIPTOR:
1625                         goto tr_valid;  /* nop */
1626                 case UR_SET_FEATURE:
1627                 default:
1628                         goto tr_stalled;
1629                 }
1630                 break;
1631
1632         case UT_WRITE_ENDPOINT:
1633                 switch (req->bRequest) {
1634                 case UR_CLEAR_FEATURE:
1635                         switch (UGETW(req->wValue)) {
1636                         case UF_ENDPOINT_HALT:
1637                                 goto tr_handle_clear_halt;
1638                         case UF_DEVICE_REMOTE_WAKEUP:
1639                                 goto tr_handle_clear_wakeup;
1640                         default:
1641                                 goto tr_stalled;
1642                         }
1643                         break;
1644                 case UR_SET_FEATURE:
1645                         switch (UGETW(req->wValue)) {
1646                         case UF_ENDPOINT_HALT:
1647                                 goto tr_handle_set_halt;
1648                         case UF_DEVICE_REMOTE_WAKEUP:
1649                                 goto tr_handle_set_wakeup;
1650                         default:
1651                                 goto tr_stalled;
1652                         }
1653                         break;
1654                 case UR_SYNCH_FRAME:
1655                         goto tr_valid;  /* nop */
1656                 default:
1657                         goto tr_stalled;
1658                 }
1659                 break;
1660
1661         case UT_READ_ENDPOINT:
1662                 switch (req->bRequest) {
1663                 case UR_GET_STATUS:
1664                         goto tr_handle_get_ep_status;
1665                 default:
1666                         goto tr_stalled;
1667                 }
1668                 break;
1669
1670         case UT_WRITE_INTERFACE:
1671                 switch (req->bRequest) {
1672                 case UR_SET_INTERFACE:
1673                         goto tr_handle_set_interface;
1674                 case UR_CLEAR_FEATURE:
1675                         goto tr_valid;  /* nop */
1676                 case UR_SET_FEATURE:
1677                 default:
1678                         goto tr_stalled;
1679                 }
1680                 break;
1681
1682         case UT_READ_INTERFACE:
1683                 switch (req->bRequest) {
1684                 case UR_GET_INTERFACE:
1685                         goto tr_handle_get_interface;
1686                 case UR_GET_STATUS:
1687                         goto tr_handle_get_iface_status;
1688                 default:
1689                         goto tr_stalled;
1690                 }
1691                 break;
1692
1693         case UT_WRITE_CLASS_INTERFACE:
1694         case UT_WRITE_VENDOR_INTERFACE:
1695                 /* XXX forward */
1696                 break;
1697
1698         case UT_READ_CLASS_INTERFACE:
1699         case UT_READ_VENDOR_INTERFACE:
1700                 /* XXX forward */
1701                 break;
1702
1703         case UT_WRITE_CLASS_DEVICE:
1704                 switch (req->bRequest) {
1705                 case UR_CLEAR_FEATURE:
1706                         goto tr_valid;
1707                 case UR_SET_DESCRIPTOR:
1708                 case UR_SET_FEATURE:
1709                         break;
1710                 default:
1711                         goto tr_stalled;
1712                 }
1713                 break;
1714
1715         case UT_WRITE_CLASS_OTHER:
1716                 switch (req->bRequest) {
1717                 case UR_CLEAR_FEATURE:
1718                         goto tr_handle_clear_port_feature;
1719                 case UR_SET_FEATURE:
1720                         goto tr_handle_set_port_feature;
1721                 case UR_CLEAR_TT_BUFFER:
1722                 case UR_RESET_TT:
1723                 case UR_STOP_TT:
1724                         goto tr_valid;
1725
1726                 default:
1727                         goto tr_stalled;
1728                 }
1729                 break;
1730
1731         case UT_READ_CLASS_OTHER:
1732                 switch (req->bRequest) {
1733                 case UR_GET_TT_STATE:
1734                         goto tr_handle_get_tt_state;
1735                 case UR_GET_STATUS:
1736                         goto tr_handle_get_port_status;
1737                 default:
1738                         goto tr_stalled;
1739                 }
1740                 break;
1741
1742         case UT_READ_CLASS_DEVICE:
1743                 switch (req->bRequest) {
1744                 case UR_GET_DESCRIPTOR:
1745                         goto tr_handle_get_class_descriptor;
1746                 case UR_GET_STATUS:
1747                         goto tr_handle_get_class_status;
1748
1749                 default:
1750                         goto tr_stalled;
1751                 }
1752                 break;
1753         default:
1754                 goto tr_stalled;
1755         }
1756         goto tr_valid;
1757
1758 tr_handle_get_descriptor:
1759         switch (value >> 8) {
1760         case UDESC_DEVICE:
1761                 if (value & 0xff) {
1762                         goto tr_stalled;
1763                 }
1764                 len = sizeof(atmegadci_devd);
1765                 ptr = (const void *)&atmegadci_devd;
1766                 goto tr_valid;
1767         case UDESC_CONFIG:
1768                 if (value & 0xff) {
1769                         goto tr_stalled;
1770                 }
1771                 len = sizeof(atmegadci_confd);
1772                 ptr = (const void *)&atmegadci_confd;
1773                 goto tr_valid;
1774         case UDESC_STRING:
1775                 switch (value & 0xff) {
1776                 case 0:         /* Language table */
1777                         len = sizeof(atmegadci_langtab);
1778                         ptr = (const void *)&atmegadci_langtab;
1779                         goto tr_valid;
1780
1781                 case 1:         /* Vendor */
1782                         len = sizeof(atmegadci_vendor);
1783                         ptr = (const void *)&atmegadci_vendor;
1784                         goto tr_valid;
1785
1786                 case 2:         /* Product */
1787                         len = sizeof(atmegadci_product);
1788                         ptr = (const void *)&atmegadci_product;
1789                         goto tr_valid;
1790                 default:
1791                         break;
1792                 }
1793                 break;
1794         default:
1795                 goto tr_stalled;
1796         }
1797         goto tr_stalled;
1798
1799 tr_handle_get_config:
1800         len = 1;
1801         sc->sc_hub_temp.wValue[0] = sc->sc_conf;
1802         goto tr_valid;
1803
1804 tr_handle_get_status:
1805         len = 2;
1806         USETW(sc->sc_hub_temp.wValue, UDS_SELF_POWERED);
1807         goto tr_valid;
1808
1809 tr_handle_set_address:
1810         if (value & 0xFF00) {
1811                 goto tr_stalled;
1812         }
1813         sc->sc_rt_addr = value;
1814         goto tr_valid;
1815
1816 tr_handle_set_config:
1817         if (value >= 2) {
1818                 goto tr_stalled;
1819         }
1820         sc->sc_conf = value;
1821         goto tr_valid;
1822
1823 tr_handle_get_interface:
1824         len = 1;
1825         sc->sc_hub_temp.wValue[0] = 0;
1826         goto tr_valid;
1827
1828 tr_handle_get_tt_state:
1829 tr_handle_get_class_status:
1830 tr_handle_get_iface_status:
1831 tr_handle_get_ep_status:
1832         len = 2;
1833         USETW(sc->sc_hub_temp.wValue, 0);
1834         goto tr_valid;
1835
1836 tr_handle_set_halt:
1837 tr_handle_set_interface:
1838 tr_handle_set_wakeup:
1839 tr_handle_clear_wakeup:
1840 tr_handle_clear_halt:
1841         goto tr_valid;
1842
1843 tr_handle_clear_port_feature:
1844         if (index != 1) {
1845                 goto tr_stalled;
1846         }
1847         DPRINTFN(9, "UR_CLEAR_PORT_FEATURE on port %d\n", index);
1848
1849         switch (value) {
1850         case UHF_PORT_SUSPEND:
1851                 atmegadci_wakeup_peer(sc);
1852                 break;
1853
1854         case UHF_PORT_ENABLE:
1855                 sc->sc_flags.port_enabled = 0;
1856                 break;
1857
1858         case UHF_PORT_TEST:
1859         case UHF_PORT_INDICATOR:
1860         case UHF_C_PORT_ENABLE:
1861         case UHF_C_PORT_OVER_CURRENT:
1862         case UHF_C_PORT_RESET:
1863                 /* nops */
1864                 break;
1865         case UHF_PORT_POWER:
1866                 sc->sc_flags.port_powered = 0;
1867                 atmegadci_pull_down(sc);
1868                 atmegadci_clocks_off(sc);
1869                 break;
1870         case UHF_C_PORT_CONNECTION:
1871                 /* clear connect change flag */
1872                 sc->sc_flags.change_connect = 0;
1873
1874                 if (!sc->sc_flags.status_bus_reset) {
1875                         /* we are not connected */
1876                         break;
1877                 }
1878
1879                 /* configure the control endpoint */
1880
1881                 /* select endpoint number */
1882                 ATMEGA_WRITE_1(sc, ATMEGA_UENUM, 0);
1883
1884                 /* set endpoint reset */
1885                 ATMEGA_WRITE_1(sc, ATMEGA_UERST, ATMEGA_UERST_MASK(0));
1886
1887                 /* clear endpoint reset */
1888                 ATMEGA_WRITE_1(sc, ATMEGA_UERST, 0);
1889
1890                 /* enable and stall endpoint */
1891                 ATMEGA_WRITE_1(sc, ATMEGA_UECONX,
1892                     ATMEGA_UECONX_EPEN |
1893                     ATMEGA_UECONX_STALLRQ);
1894
1895                 /* one bank, 64-bytes wMaxPacket */
1896                 ATMEGA_WRITE_1(sc, ATMEGA_UECFG0X,
1897                     ATMEGA_UECFG0X_EPTYPE0);
1898                 ATMEGA_WRITE_1(sc, ATMEGA_UECFG1X,
1899                     ATMEGA_UECFG1X_ALLOC |
1900                     ATMEGA_UECFG1X_EPBK0 |
1901                     ATMEGA_UECFG1X_EPSIZE(3));
1902
1903                 /* check valid config */
1904                 temp = ATMEGA_READ_1(sc, ATMEGA_UESTA0X);
1905                 if (!(temp & ATMEGA_UESTA0X_CFGOK)) {
1906                         device_printf(sc->sc_bus.bdev,
1907                             "Chip rejected EP0 configuration\n");
1908                 }
1909                 break;
1910         case UHF_C_PORT_SUSPEND:
1911                 sc->sc_flags.change_suspend = 0;
1912                 break;
1913         default:
1914                 err = USB_ERR_IOERROR;
1915                 goto done;
1916         }
1917         goto tr_valid;
1918
1919 tr_handle_set_port_feature:
1920         if (index != 1) {
1921                 goto tr_stalled;
1922         }
1923         DPRINTFN(9, "UR_SET_PORT_FEATURE\n");
1924
1925         switch (value) {
1926         case UHF_PORT_ENABLE:
1927                 sc->sc_flags.port_enabled = 1;
1928                 break;
1929         case UHF_PORT_SUSPEND:
1930         case UHF_PORT_RESET:
1931         case UHF_PORT_TEST:
1932         case UHF_PORT_INDICATOR:
1933                 /* nops */
1934                 break;
1935         case UHF_PORT_POWER:
1936                 sc->sc_flags.port_powered = 1;
1937                 break;
1938         default:
1939                 err = USB_ERR_IOERROR;
1940                 goto done;
1941         }
1942         goto tr_valid;
1943
1944 tr_handle_get_port_status:
1945
1946         DPRINTFN(9, "UR_GET_PORT_STATUS\n");
1947
1948         if (index != 1) {
1949                 goto tr_stalled;
1950         }
1951         if (sc->sc_flags.status_vbus) {
1952                 atmegadci_clocks_on(sc);
1953                 atmegadci_pull_up(sc);
1954         } else {
1955                 atmegadci_pull_down(sc);
1956                 atmegadci_clocks_off(sc);
1957         }
1958
1959         /* Select FULL-speed and Device Side Mode */
1960
1961         value = UPS_PORT_MODE_DEVICE;
1962
1963         if (sc->sc_flags.port_powered) {
1964                 value |= UPS_PORT_POWER;
1965         }
1966         if (sc->sc_flags.port_enabled) {
1967                 value |= UPS_PORT_ENABLED;
1968         }
1969         if (sc->sc_flags.status_vbus &&
1970             sc->sc_flags.status_bus_reset) {
1971                 value |= UPS_CURRENT_CONNECT_STATUS;
1972         }
1973         if (sc->sc_flags.status_suspend) {
1974                 value |= UPS_SUSPEND;
1975         }
1976         USETW(sc->sc_hub_temp.ps.wPortStatus, value);
1977
1978         value = 0;
1979
1980         if (sc->sc_flags.change_connect) {
1981                 value |= UPS_C_CONNECT_STATUS;
1982         }
1983         if (sc->sc_flags.change_suspend) {
1984                 value |= UPS_C_SUSPEND;
1985         }
1986         USETW(sc->sc_hub_temp.ps.wPortChange, value);
1987         len = sizeof(sc->sc_hub_temp.ps);
1988         goto tr_valid;
1989
1990 tr_handle_get_class_descriptor:
1991         if (value & 0xFF) {
1992                 goto tr_stalled;
1993         }
1994         ptr = (const void *)&atmegadci_hubd;
1995         len = sizeof(atmegadci_hubd);
1996         goto tr_valid;
1997
1998 tr_stalled:
1999         err = USB_ERR_STALLED;
2000 tr_valid:
2001 done:
2002         *plength = len;
2003         *pptr = ptr;
2004         return (err);
2005 }
2006
2007 static void
2008 atmegadci_xfer_setup(struct usb_setup_params *parm)
2009 {
2010         const struct usb_hw_ep_profile *pf;
2011         struct atmegadci_softc *sc;
2012         struct usb_xfer *xfer;
2013         void *last_obj;
2014         uint32_t ntd;
2015         uint32_t n;
2016         uint8_t ep_no;
2017
2018         sc = ATMEGA_BUS2SC(parm->udev->bus);
2019         xfer = parm->curr_xfer;
2020
2021         /*
2022          * NOTE: This driver does not use any of the parameters that
2023          * are computed from the following values. Just set some
2024          * reasonable dummies:
2025          */
2026         parm->hc_max_packet_size = 0x500;
2027         parm->hc_max_packet_count = 1;
2028         parm->hc_max_frame_size = 0x500;
2029
2030         usbd_transfer_setup_sub(parm);
2031
2032         /*
2033          * compute maximum number of TDs
2034          */
2035         if ((xfer->endpoint->edesc->bmAttributes & UE_XFERTYPE) == UE_CONTROL) {
2036
2037                 ntd = xfer->nframes + 1 /* STATUS */ + 1 /* SYNC 1 */
2038                     + 1 /* SYNC 2 */ ;
2039         } else {
2040
2041                 ntd = xfer->nframes + 1 /* SYNC */ ;
2042         }
2043
2044         /*
2045          * check if "usbd_transfer_setup_sub" set an error
2046          */
2047         if (parm->err)
2048                 return;
2049
2050         /*
2051          * allocate transfer descriptors
2052          */
2053         last_obj = NULL;
2054
2055         /*
2056          * get profile stuff
2057          */
2058         ep_no = xfer->endpointno & UE_ADDR;
2059         atmegadci_get_hw_ep_profile(parm->udev, &pf, ep_no);
2060
2061         if (pf == NULL) {
2062                 /* should not happen */
2063                 parm->err = USB_ERR_INVAL;
2064                 return;
2065         }
2066
2067         /* align data */
2068         parm->size[0] += ((-parm->size[0]) & (USB_HOST_ALIGN - 1));
2069
2070         for (n = 0; n != ntd; n++) {
2071
2072                 struct atmegadci_td *td;
2073
2074                 if (parm->buf) {
2075
2076                         td = USB_ADD_BYTES(parm->buf, parm->size[0]);
2077
2078                         /* init TD */
2079                         td->max_packet_size = xfer->max_packet_size;
2080                         td->ep_no = ep_no;
2081                         if (pf->support_multi_buffer) {
2082                                 td->support_multi_buffer = 1;
2083                         }
2084                         td->obj_next = last_obj;
2085
2086                         last_obj = td;
2087                 }
2088                 parm->size[0] += sizeof(*td);
2089         }
2090
2091         xfer->td_start[0] = last_obj;
2092 }
2093
2094 static void
2095 atmegadci_xfer_unsetup(struct usb_xfer *xfer)
2096 {
2097         return;
2098 }
2099
2100 static void
2101 atmegadci_ep_init(struct usb_device *udev, struct usb_endpoint_descriptor *edesc,
2102     struct usb_endpoint *ep)
2103 {
2104         struct atmegadci_softc *sc = ATMEGA_BUS2SC(udev->bus);
2105
2106         DPRINTFN(2, "endpoint=%p, addr=%d, endpt=%d, mode=%d (%d,%d)\n",
2107             ep, udev->address,
2108             edesc->bEndpointAddress, udev->flags.usb_mode,
2109             sc->sc_rt_addr, udev->device_index);
2110
2111         if (udev->device_index != sc->sc_rt_addr) {
2112
2113                 if (udev->flags.usb_mode != USB_MODE_DEVICE) {
2114                         /* not supported */
2115                         return;
2116                 }
2117                 if (udev->speed != USB_SPEED_FULL) {
2118                         /* not supported */
2119                         return;
2120                 }
2121                 if ((edesc->bmAttributes & UE_XFERTYPE) == UE_ISOCHRONOUS)
2122                         ep->methods = &atmegadci_device_isoc_fs_methods;
2123                 else
2124                         ep->methods = &atmegadci_device_non_isoc_methods;
2125         }
2126 }
2127
2128 static void
2129 atmegadci_set_hw_power_sleep(struct usb_bus *bus, uint32_t state)
2130 {
2131         struct atmegadci_softc *sc = ATMEGA_BUS2SC(bus);
2132
2133         switch (state) {
2134         case USB_HW_POWER_SUSPEND:
2135                 atmegadci_suspend(sc);
2136                 break;
2137         case USB_HW_POWER_SHUTDOWN:
2138                 atmegadci_uninit(sc);
2139                 break;
2140         case USB_HW_POWER_RESUME:
2141                 atmegadci_resume(sc);
2142                 break;
2143         default:
2144                 break;
2145         }
2146 }
2147
2148 struct usb_bus_methods atmegadci_bus_methods =
2149 {
2150         .endpoint_init = &atmegadci_ep_init,
2151         .xfer_setup = &atmegadci_xfer_setup,
2152         .xfer_unsetup = &atmegadci_xfer_unsetup,
2153         .get_hw_ep_profile = &atmegadci_get_hw_ep_profile,
2154         .set_stall = &atmegadci_set_stall,
2155         .clear_stall = &atmegadci_clear_stall,
2156         .roothub_exec = &atmegadci_roothub_exec,
2157         .xfer_poll = &atmegadci_do_poll,
2158         .set_hw_power_sleep = &atmegadci_set_hw_power_sleep,
2159 };