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rename CFG_ macros to CONFIG_SYS
[people/ms/u-boot.git] / drivers / usb / usbdcore_mpc8xx.c
1 /*
2 * Copyright (C) 2006 by Bryan O'Donoghue, CodeHermit
3 * bodonoghue@CodeHermit.ie
4 *
5 * References
6 * DasUBoot/drivers/usb/usbdcore_omap1510.c, for design and implementation
7 * ideas.
8 *
9 * 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
21 * Free Software Foundation, Inc.,
22 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 *
24 */
25
26 /*
27 * Notes :
28 * 1. #define __SIMULATE_ERROR__ to inject a CRC error into every 2nd TX
29 * packet to force the USB re-transmit protocol.
30 *
31 * 2. #define __DEBUG_UDC__ to switch on debug tracing to serial console
32 * be careful that tracing doesn't create Hiesen-bugs with respect to
33 * response timeouts to control requests.
34 *
35 * 3. This driver should be able to support any higher level driver that
36 * that wants to do either of the two standard UDC implementations
37 * Control-Bulk-Interrupt or Bulk-IN/Bulk-Out standards. Hence
38 * gserial and cdc_acm should work with this code.
39 *
40 * 4. NAK events never actually get raised at all, the documentation
41 * is just wrong !
42 *
43 * 5. For some reason, cbd_datlen is *always* +2 the value it should be.
44 * this means that having an RX cbd of 16 bytes is not possible, since
45 * the same size is reported for 14 bytes received as 16 bytes received
46 * until we can find out why this happens, RX cbds must be limited to 8
47 * bytes. TODO: check errata for this behaviour.
48 *
49 * 6. Right now this code doesn't support properly powering up with the USB
50 * cable attached to the USB host my development board the Adder87x doesn't
51 * have a pull-up fitted to allow this, so it is necessary to power the
52 * board and *then* attached the USB cable to the host. However somebody
53 * with a different design in their board may be able to keep the cable
54 * constantly connected and simply enable/disable a pull-up re
55 * figure 31.1 in MPC885RM.pdf instead of having to power up the board and
56 * then attach the cable !
57 *
58 */
59 #include <common.h>
60 #include <config.h>
61
62 #if defined(CONFIG_MPC885_FAMILY) && defined(CONFIG_USB_DEVICE)
63 #include <commproc.h>
64 #include "usbdcore.h"
65 #include "usbdcore_mpc8xx.h"
66 #include "usbdcore_ep0.h"
67
68 DECLARE_GLOBAL_DATA_PTR;
69
70 #define ERR(fmt, args...)\
71 serial_printf("ERROR : [%s] %s:%d: "fmt,\
72 __FILE__,__FUNCTION__,__LINE__, ##args)
73 #ifdef __DEBUG_UDC__
74 #define DBG(fmt,args...)\
75 serial_printf("[%s] %s:%d: "fmt,\
76 __FILE__,__FUNCTION__,__LINE__, ##args)
77 #else
78 #define DBG(fmt,args...)
79 #endif
80
81 /* Static Data */
82 #ifdef __SIMULATE_ERROR__
83 static char err_poison_test = 0;
84 #endif
85 static struct mpc8xx_ep ep_ref[MAX_ENDPOINTS];
86 static u32 address_base = STATE_NOT_READY;
87 static mpc8xx_udc_state_t udc_state = 0;
88 static struct usb_device_instance *udc_device = 0;
89 static volatile usb_epb_t *endpoints[MAX_ENDPOINTS];
90 static volatile cbd_t *tx_cbd[TX_RING_SIZE];
91 static volatile cbd_t *rx_cbd[RX_RING_SIZE];
92 static volatile immap_t *immr = 0;
93 static volatile cpm8xx_t *cp = 0;
94 static volatile usb_pram_t *usb_paramp = 0;
95 static volatile usb_t *usbp = 0;
96 static int rx_ct = 0;
97 static int tx_ct = 0;
98
99 /* Static Function Declarations */
100 static void mpc8xx_udc_state_transition_up (usb_device_state_t initial,
101 usb_device_state_t final);
102 static void mpc8xx_udc_state_transition_down (usb_device_state_t initial,
103 usb_device_state_t final);
104 static void mpc8xx_udc_stall (unsigned int ep);
105 static void mpc8xx_udc_flush_tx_fifo (int epid);
106 static void mpc8xx_udc_flush_rx_fifo (void);
107 static void mpc8xx_udc_clear_rxbd (volatile cbd_t * rx_cbdp);
108 static void mpc8xx_udc_init_tx (struct usb_endpoint_instance *epi,
109 struct urb *tx_urb);
110 static void mpc8xx_udc_dump_request (struct usb_device_request *request);
111 static void mpc8xx_udc_clock_init (volatile immap_t * immr,
112 volatile cpm8xx_t * cp);
113 static int mpc8xx_udc_ep_tx (struct usb_endpoint_instance *epi);
114 static int mpc8xx_udc_epn_rx (unsigned int epid, volatile cbd_t * rx_cbdp);
115 static void mpc8xx_udc_ep0_rx (volatile cbd_t * rx_cbdp);
116 static void mpc8xx_udc_cbd_init (void);
117 static void mpc8xx_udc_endpoint_init (void);
118 static void mpc8xx_udc_cbd_attach (int ep, uchar tx_size, uchar rx_size);
119 static u32 mpc8xx_udc_alloc (u32 data_size, u32 alignment);
120 static int mpc8xx_udc_ep0_rx_setup (volatile cbd_t * rx_cbdp);
121 static void mpc8xx_udc_set_nak (unsigned int ep);
122 static short mpc8xx_udc_handle_txerr (void);
123 static void mpc8xx_udc_advance_rx (volatile cbd_t ** rx_cbdp, int epid);
124
125 /******************************************************************************
126 Global Linkage
127 *****************************************************************************/
128
129 /* udc_init
130 *
131 * Do initial bus gluing
132 */
133 int udc_init (void)
134 {
135 /* Init various pointers */
136 immr = (immap_t *) CONFIG_SYS_IMMR;
137 cp = (cpm8xx_t *) & (immr->im_cpm);
138 usb_paramp = (usb_pram_t *) & (cp->cp_dparam[PROFF_USB]);
139 usbp = (usb_t *) & (cp->cp_scc[0]);
140
141 memset (ep_ref, 0x00, (sizeof (struct mpc8xx_ep) * MAX_ENDPOINTS));
142
143 udc_device = 0;
144 udc_state = STATE_NOT_READY;
145
146 usbp->usmod = 0x00;
147 usbp->uscom = 0;
148
149 /* Set USB Frame #0, Respond at Address & Get a clock source */
150 usbp->usaddr = 0x00;
151 mpc8xx_udc_clock_init (immr, cp);
152
153 /* PA15, PA14 as perhiperal USBRXD and USBOE */
154 immr->im_ioport.iop_padir &= ~0x0003;
155 immr->im_ioport.iop_papar |= 0x0003;
156
157 /* PC11/PC10 as peripheral USBRXP USBRXN */
158 immr->im_ioport.iop_pcso |= 0x0030;
159
160 /* PC7/PC6 as perhiperal USBTXP and USBTXN */
161 immr->im_ioport.iop_pcdir |= 0x0300;
162 immr->im_ioport.iop_pcpar |= 0x0300;
163
164 /* Set the base address */
165 address_base = (u32) (cp->cp_dpmem + CPM_USB_BASE);
166
167 /* Initialise endpoints and circular buffers */
168 mpc8xx_udc_endpoint_init ();
169 mpc8xx_udc_cbd_init ();
170
171 /* Assign allocated Dual Port Endpoint descriptors */
172 usb_paramp->ep0ptr = (u32) endpoints[0];
173 usb_paramp->ep1ptr = (u32) endpoints[1];
174 usb_paramp->ep2ptr = (u32) endpoints[2];
175 usb_paramp->ep3ptr = (u32) endpoints[3];
176 usb_paramp->frame_n = 0;
177
178 DBG ("ep0ptr=0x%08x ep1ptr=0x%08x ep2ptr=0x%08x ep3ptr=0x%08x\n",
179 usb_paramp->ep0ptr, usb_paramp->ep1ptr, usb_paramp->ep2ptr,
180 usb_paramp->ep3ptr);
181
182 return 0;
183 }
184
185 /* udc_irq
186 *
187 * Poll for whatever events may have occured
188 */
189 void udc_irq (void)
190 {
191 int epid = 0;
192 volatile cbd_t *rx_cbdp = 0;
193 volatile cbd_t *rx_cbdp_base = 0;
194
195 if (udc_state != STATE_READY) {
196 return;
197 }
198
199 if (usbp->usber & USB_E_BSY) {
200 /* This shouldn't happen. If it does then it's a bug ! */
201 usbp->usber |= USB_E_BSY;
202 mpc8xx_udc_flush_rx_fifo ();
203 }
204
205 /* Scan all RX/Bidirectional Endpoints for RX data. */
206 for (epid = 0; epid < MAX_ENDPOINTS; epid++) {
207 if (!ep_ref[epid].prx) {
208 continue;
209 }
210 rx_cbdp = rx_cbdp_base = ep_ref[epid].prx;
211
212 do {
213 if (!(rx_cbdp->cbd_sc & RX_BD_E)) {
214
215 if (rx_cbdp->cbd_sc & 0x1F) {
216 /* Corrupt data discard it.
217 * Controller has NAK'd this packet.
218 */
219 mpc8xx_udc_clear_rxbd (rx_cbdp);
220
221 } else {
222 if (!epid) {
223 mpc8xx_udc_ep0_rx (rx_cbdp);
224
225 } else {
226 /* Process data */
227 mpc8xx_udc_set_nak (epid);
228 mpc8xx_udc_epn_rx (epid, rx_cbdp);
229 mpc8xx_udc_clear_rxbd (rx_cbdp);
230 }
231 }
232
233 /* Advance RX CBD pointer */
234 mpc8xx_udc_advance_rx (&rx_cbdp, epid);
235 ep_ref[epid].prx = rx_cbdp;
236 } else {
237 /* Advance RX CBD pointer */
238 mpc8xx_udc_advance_rx (&rx_cbdp, epid);
239 }
240
241 } while (rx_cbdp != rx_cbdp_base);
242 }
243
244 /* Handle TX events as appropiate, the correct place to do this is
245 * in a tx routine. Perhaps TX on epn was pre-empted by ep0
246 */
247
248 if (usbp->usber & USB_E_TXB) {
249 usbp->usber |= USB_E_TXB;
250 }
251
252 if (usbp->usber & (USB_TX_ERRMASK)) {
253 mpc8xx_udc_handle_txerr ();
254 }
255
256 /* Switch to the default state, respond at the default address */
257 if (usbp->usber & USB_E_RESET) {
258 usbp->usber |= USB_E_RESET;
259 usbp->usaddr = 0x00;
260 udc_device->device_state = STATE_DEFAULT;
261 }
262
263 /* if(usbp->usber&USB_E_IDLE){
264 We could suspend here !
265 usbp->usber|=USB_E_IDLE;
266 DBG("idle state change\n");
267 }
268 if(usbp->usbs){
269 We could resume here when IDLE is deasserted !
270 Not worth doing, so long as we are self powered though.
271 }
272 */
273
274 return;
275 }
276
277 /* udc_endpoint_write
278 *
279 * Write some data to an endpoint
280 */
281 int udc_endpoint_write (struct usb_endpoint_instance *epi)
282 {
283 int ep = 0;
284 short epid = 1, unnak = 0, ret = 0;
285
286 if (udc_state != STATE_READY) {
287 ERR ("invalid udc_state != STATE_READY!\n");
288 return -1;
289 }
290
291 if (!udc_device || !epi) {
292 return -1;
293 }
294
295 if (udc_device->device_state != STATE_CONFIGURED) {
296 return -1;
297 }
298
299 ep = epi->endpoint_address & 0x03;
300 if (ep >= MAX_ENDPOINTS) {
301 return -1;
302 }
303
304 /* Set NAK for all RX endpoints during TX */
305 for (epid = 1; epid < MAX_ENDPOINTS; epid++) {
306
307 /* Don't set NAK on DATA IN/CONTROL endpoints */
308 if (ep_ref[epid].sc & USB_DIR_IN) {
309 continue;
310 }
311
312 if (!(usbp->usep[epid] & (USEP_THS_NAK | USEP_RHS_NAK))) {
313 unnak |= 1 << epid;
314 }
315
316 mpc8xx_udc_set_nak (epid);
317 }
318
319 mpc8xx_udc_init_tx (&udc_device->bus->endpoint_array[ep],
320 epi->tx_urb);
321 ret = mpc8xx_udc_ep_tx (&udc_device->bus->endpoint_array[ep]);
322
323 /* Remove temporary NAK */
324 for (epid = 1; epid < MAX_ENDPOINTS; epid++) {
325 if (unnak & (1 << epid)) {
326 udc_unset_nak (epid);
327 }
328 }
329
330 return ret;
331 }
332
333 /* mpc8xx_udc_assign_urb
334 *
335 * Associate a given urb to an endpoint TX or RX transmit/receive buffers
336 */
337 static int mpc8xx_udc_assign_urb (int ep, char direction)
338 {
339 struct usb_endpoint_instance *epi = 0;
340
341 if (ep >= MAX_ENDPOINTS) {
342 goto err;
343 }
344 epi = &udc_device->bus->endpoint_array[ep];
345 if (!epi) {
346 goto err;
347 }
348
349 if (!ep_ref[ep].urb) {
350 ep_ref[ep].urb = usbd_alloc_urb (udc_device, udc_device->bus->endpoint_array);
351 if (!ep_ref[ep].urb) {
352 goto err;
353 }
354 } else {
355 ep_ref[ep].urb->actual_length = 0;
356 }
357
358 switch (direction) {
359 case USB_DIR_IN:
360 epi->tx_urb = ep_ref[ep].urb;
361 break;
362 case USB_DIR_OUT:
363 epi->rcv_urb = ep_ref[ep].urb;
364 break;
365 default:
366 goto err;
367 }
368 return 0;
369
370 err:
371 udc_state = STATE_ERROR;
372 return -1;
373 }
374
375 /* udc_setup_ep
376 *
377 * Associate U-Boot software endpoints to mpc8xx endpoint parameter ram
378 * Isochronous endpoints aren't yet supported!
379 */
380 void udc_setup_ep (struct usb_device_instance *device, unsigned int ep,
381 struct usb_endpoint_instance *epi)
382 {
383 uchar direction = 0;
384 int ep_attrib = 0;
385
386 if (epi && (ep < MAX_ENDPOINTS)) {
387
388 if (ep == 0) {
389 if (epi->rcv_attributes != USB_ENDPOINT_XFER_CONTROL
390 || epi->tx_attributes !=
391 USB_ENDPOINT_XFER_CONTROL) {
392
393 /* ep0 must be a control endpoint */
394 udc_state = STATE_ERROR;
395 return;
396
397 }
398 if (!(ep_ref[ep].sc & EP_ATTACHED)) {
399 mpc8xx_udc_cbd_attach (ep, epi->tx_packetSize,
400 epi->rcv_packetSize);
401 }
402 usbp->usep[ep] = 0x0000;
403 return;
404 }
405
406 if ((epi->endpoint_address & USB_ENDPOINT_DIR_MASK)
407 == USB_DIR_IN) {
408
409 direction = 1;
410 ep_attrib = epi->tx_attributes;
411 epi->rcv_packetSize = 0;
412 ep_ref[ep].sc |= USB_DIR_IN;
413 } else {
414
415 direction = 0;
416 ep_attrib = epi->rcv_attributes;
417 epi->tx_packetSize = 0;
418 ep_ref[ep].sc &= ~USB_DIR_IN;
419 }
420
421 if (mpc8xx_udc_assign_urb (ep, epi->endpoint_address
422 & USB_ENDPOINT_DIR_MASK)) {
423 return;
424 }
425
426 switch (ep_attrib) {
427 case USB_ENDPOINT_XFER_CONTROL:
428 if (!(ep_ref[ep].sc & EP_ATTACHED)) {
429 mpc8xx_udc_cbd_attach (ep,
430 epi->tx_packetSize,
431 epi->rcv_packetSize);
432 }
433 usbp->usep[ep] = ep << 12;
434 epi->rcv_urb = epi->tx_urb = ep_ref[ep].urb;
435
436 break;
437 case USB_ENDPOINT_XFER_BULK:
438 case USB_ENDPOINT_XFER_INT:
439 if (!(ep_ref[ep].sc & EP_ATTACHED)) {
440 if (direction) {
441 mpc8xx_udc_cbd_attach (ep,
442 epi->tx_packetSize,
443 0);
444 } else {
445 mpc8xx_udc_cbd_attach (ep,
446 0,
447 epi->rcv_packetSize);
448 }
449 }
450 usbp->usep[ep] = (ep << 12) | ((ep_attrib) << 8);
451
452 break;
453 case USB_ENDPOINT_XFER_ISOC:
454 default:
455 serial_printf ("Error endpoint attrib %d>3\n", ep_attrib);
456 udc_state = STATE_ERROR;
457 break;
458 }
459 }
460
461 }
462
463 /* udc_connect
464 *
465 * Move state, switch on the USB
466 */
467 void udc_connect (void)
468 {
469 /* Enable pull-up resistor on D+
470 * TODO: fit a pull-up resistor to drive SE0 for > 2.5us
471 */
472
473 if (udc_state != STATE_ERROR) {
474 udc_state = STATE_READY;
475 usbp->usmod |= USMOD_EN;
476 }
477 }
478
479 /* udc_disconnect
480 *
481 * Disconnect is not used but, is included for completeness
482 */
483 void udc_disconnect (void)
484 {
485 /* Disable pull-up resistor on D-
486 * TODO: fix a pullup resistor to control this
487 */
488
489 if (udc_state != STATE_ERROR) {
490 udc_state = STATE_NOT_READY;
491 }
492 usbp->usmod &= ~USMOD_EN;
493 }
494
495 /* udc_enable
496 *
497 * Grab an EP0 URB, register interest in a subset of USB events
498 */
499 void udc_enable (struct usb_device_instance *device)
500 {
501 if (udc_state == STATE_ERROR) {
502 return;
503 }
504
505 udc_device = device;
506
507 if (!ep_ref[0].urb) {
508 ep_ref[0].urb = usbd_alloc_urb (device, device->bus->endpoint_array);
509 }
510
511 /* Register interest in all events except SOF, enable transceiver */
512 usbp->usber = 0x03FF;
513 usbp->usbmr = 0x02F7;
514
515 return;
516 }
517
518 /* udc_disable
519 *
520 * disable the currently hooked device
521 */
522 void udc_disable (void)
523 {
524 int i = 0;
525
526 if (udc_state == STATE_ERROR) {
527 DBG ("Won't disable UDC. udc_state==STATE_ERROR !\n");
528 return;
529 }
530
531 udc_device = 0;
532
533 for (; i < MAX_ENDPOINTS; i++) {
534 if (ep_ref[i].urb) {
535 usbd_dealloc_urb (ep_ref[i].urb);
536 ep_ref[i].urb = 0;
537 }
538 }
539
540 usbp->usbmr = 0x00;
541 usbp->usmod = ~USMOD_EN;
542 udc_state = STATE_NOT_READY;
543 }
544
545 /* udc_startup_events
546 *
547 * Enable the specified device
548 */
549 void udc_startup_events (struct usb_device_instance *device)
550 {
551 udc_enable (device);
552 if (udc_state == STATE_READY) {
553 usbd_device_event_irq (device, DEVICE_CREATE, 0);
554 }
555 }
556
557 /* udc_set_nak
558 *
559 * Allow upper layers to signal lower layers should not accept more RX data
560 *
561 */
562 void udc_set_nak (int epid)
563 {
564 if (epid) {
565 mpc8xx_udc_set_nak (epid);
566 }
567 }
568
569 /* udc_unset_nak
570 *
571 * Suspend sending of NAK tokens for DATA OUT tokens on a given endpoint.
572 * Switch off NAKing on this endpoint to accept more data output from host.
573 *
574 */
575 void udc_unset_nak (int epid)
576 {
577 if (epid > MAX_ENDPOINTS) {
578 return;
579 }
580
581 if (usbp->usep[epid] & (USEP_THS_NAK | USEP_RHS_NAK)) {
582 usbp->usep[epid] &= ~(USEP_THS_NAK | USEP_RHS_NAK);
583 __asm__ ("eieio");
584 }
585 }
586
587 /******************************************************************************
588 Static Linkage
589 ******************************************************************************/
590
591 /* udc_state_transition_up
592 * udc_state_transition_down
593 *
594 * Helper functions to implement device state changes. The device states and
595 * the events that transition between them are:
596 *
597 * STATE_ATTACHED
598 * || /\
599 * \/ ||
600 * DEVICE_HUB_CONFIGURED DEVICE_HUB_RESET
601 * || /\
602 * \/ ||
603 * STATE_POWERED
604 * || /\
605 * \/ ||
606 * DEVICE_RESET DEVICE_POWER_INTERRUPTION
607 * || /\
608 * \/ ||
609 * STATE_DEFAULT
610 * || /\
611 * \/ ||
612 * DEVICE_ADDRESS_ASSIGNED DEVICE_RESET
613 * || /\
614 * \/ ||
615 * STATE_ADDRESSED
616 * || /\
617 * \/ ||
618 * DEVICE_CONFIGURED DEVICE_DE_CONFIGURED
619 * || /\
620 * \/ ||
621 * STATE_CONFIGURED
622 *
623 * udc_state_transition_up transitions up (in the direction from STATE_ATTACHED
624 * to STATE_CONFIGURED) from the specified initial state to the specified final
625 * state, passing through each intermediate state on the way. If the initial
626 * state is at or above (i.e. nearer to STATE_CONFIGURED) the final state, then
627 * no state transitions will take place.
628 *
629 * udc_state_transition_down transitions down (in the direction from
630 * STATE_CONFIGURED to STATE_ATTACHED) from the specified initial state to the
631 * specified final state, passing through each intermediate state on the way.
632 * If the initial state is at or below (i.e. nearer to STATE_ATTACHED) the final
633 * state, then no state transitions will take place.
634 *
635 */
636
637 static void mpc8xx_udc_state_transition_up (usb_device_state_t initial,
638 usb_device_state_t final)
639 {
640 if (initial < final) {
641 switch (initial) {
642 case STATE_ATTACHED:
643 usbd_device_event_irq (udc_device,
644 DEVICE_HUB_CONFIGURED, 0);
645 if (final == STATE_POWERED)
646 break;
647 case STATE_POWERED:
648 usbd_device_event_irq (udc_device, DEVICE_RESET, 0);
649 if (final == STATE_DEFAULT)
650 break;
651 case STATE_DEFAULT:
652 usbd_device_event_irq (udc_device,
653 DEVICE_ADDRESS_ASSIGNED, 0);
654 if (final == STATE_ADDRESSED)
655 break;
656 case STATE_ADDRESSED:
657 usbd_device_event_irq (udc_device, DEVICE_CONFIGURED,
658 0);
659 case STATE_CONFIGURED:
660 break;
661 default:
662 break;
663 }
664 }
665 }
666
667 static void mpc8xx_udc_state_transition_down (usb_device_state_t initial,
668 usb_device_state_t final)
669 {
670 if (initial > final) {
671 switch (initial) {
672 case STATE_CONFIGURED:
673 usbd_device_event_irq (udc_device,
674 DEVICE_DE_CONFIGURED, 0);
675 if (final == STATE_ADDRESSED)
676 break;
677 case STATE_ADDRESSED:
678 usbd_device_event_irq (udc_device, DEVICE_RESET, 0);
679 if (final == STATE_DEFAULT)
680 break;
681 case STATE_DEFAULT:
682 usbd_device_event_irq (udc_device,
683 DEVICE_POWER_INTERRUPTION, 0);
684 if (final == STATE_POWERED)
685 break;
686 case STATE_POWERED:
687 usbd_device_event_irq (udc_device, DEVICE_HUB_RESET,
688 0);
689 case STATE_ATTACHED:
690 break;
691 default:
692 break;
693 }
694 }
695 }
696
697 /* mpc8xx_udc_stall
698 *
699 * Force returning of STALL tokens on the given endpoint. Protocol or function
700 * STALL conditions are permissable here
701 */
702 static void mpc8xx_udc_stall (unsigned int ep)
703 {
704 usbp->usep[ep] |= STALL_BITMASK;
705 }
706
707 /* mpc8xx_udc_set_nak
708 *
709 * Force returning of NAK responses for the given endpoint as a kind of very
710 * simple flow control
711 */
712 static void mpc8xx_udc_set_nak (unsigned int ep)
713 {
714 usbp->usep[ep] |= NAK_BITMASK;
715 __asm__ ("eieio");
716 }
717
718 /* mpc8xx_udc_handle_txerr
719 *
720 * Handle errors relevant to TX. Return a status code to allow calling
721 * indicative of what if anything happened
722 */
723 static short mpc8xx_udc_handle_txerr ()
724 {
725 short ep = 0, ret = 0;
726
727 for (; ep < TX_RING_SIZE; ep++) {
728 if (usbp->usber & (0x10 << ep)) {
729
730 /* Timeout or underrun */
731 if (tx_cbd[ep]->cbd_sc & 0x06) {
732 ret = 1;
733 mpc8xx_udc_flush_tx_fifo (ep);
734
735 } else {
736 if (usbp->usep[ep] & STALL_BITMASK) {
737 if (!ep) {
738 usbp->usep[ep] &= ~STALL_BITMASK;
739 }
740 } /* else NAK */
741 }
742 usbp->usber |= (0x10 << ep);
743 }
744 }
745 return ret;
746 }
747
748 /* mpc8xx_udc_advance_rx
749 *
750 * Advance cbd rx
751 */
752 static void mpc8xx_udc_advance_rx (volatile cbd_t ** rx_cbdp, int epid)
753 {
754 if ((*rx_cbdp)->cbd_sc & RX_BD_W) {
755 *rx_cbdp = (volatile cbd_t *) (endpoints[epid]->rbase + CONFIG_SYS_IMMR);
756
757 } else {
758 (*rx_cbdp)++;
759 }
760 }
761
762
763 /* mpc8xx_udc_flush_tx_fifo
764 *
765 * Flush a given TX fifo. Assumes one tx cbd per endpoint
766 */
767 static void mpc8xx_udc_flush_tx_fifo (int epid)
768 {
769 volatile cbd_t *tx_cbdp = 0;
770
771 if (epid > MAX_ENDPOINTS) {
772 return;
773 }
774
775 /* TX stop */
776 immr->im_cpm.cp_cpcr = ((epid << 2) | 0x1D01);
777 __asm__ ("eieio");
778 while (immr->im_cpm.cp_cpcr & 0x01);
779
780 usbp->uscom = 0x40 | 0;
781
782 /* reset ring */
783 tx_cbdp = (cbd_t *) (endpoints[epid]->tbptr + CONFIG_SYS_IMMR);
784 tx_cbdp->cbd_sc = (TX_BD_I | TX_BD_W);
785
786
787 endpoints[epid]->tptr = endpoints[epid]->tbase;
788 endpoints[epid]->tstate = 0x00;
789 endpoints[epid]->tbcnt = 0x00;
790
791 /* TX start */
792 immr->im_cpm.cp_cpcr = ((epid << 2) | 0x2D01);
793 __asm__ ("eieio");
794 while (immr->im_cpm.cp_cpcr & 0x01);
795
796 return;
797 }
798
799 /* mpc8xx_udc_flush_rx_fifo
800 *
801 * For the sake of completeness of the namespace, it seems like
802 * a good-design-decision (tm) to include mpc8xx_udc_flush_rx_fifo();
803 * If RX_BD_E is true => a driver bug either here or in an upper layer
804 * not polling frequently enough. If RX_BD_E is true we have told the host
805 * we have accepted data but, the CPM found it had no-where to put that data
806 * which needless to say would be a bad thing.
807 */
808 static void mpc8xx_udc_flush_rx_fifo ()
809 {
810 int i = 0;
811
812 for (i = 0; i < RX_RING_SIZE; i++) {
813 if (!(rx_cbd[i]->cbd_sc & RX_BD_E)) {
814 ERR ("buf %p used rx data len = 0x%x sc=0x%x!\n",
815 rx_cbd[i], rx_cbd[i]->cbd_datlen,
816 rx_cbd[i]->cbd_sc);
817
818 }
819 }
820 ERR ("BUG : Input over-run\n");
821 }
822
823 /* mpc8xx_udc_clear_rxbd
824 *
825 * Release control of RX CBD to CP.
826 */
827 static void mpc8xx_udc_clear_rxbd (volatile cbd_t * rx_cbdp)
828 {
829 rx_cbdp->cbd_datlen = 0x0000;
830 rx_cbdp->cbd_sc = ((rx_cbdp->cbd_sc & RX_BD_W) | (RX_BD_E | RX_BD_I));
831 __asm__ ("eieio");
832 }
833
834 /* mpc8xx_udc_tx_irq
835 *
836 * Parse for tx timeout, control RX or USB reset/busy conditions
837 * Return -1 on timeout, -2 on fatal error, else return zero
838 */
839 static int mpc8xx_udc_tx_irq (int ep)
840 {
841 int i = 0;
842
843 if (usbp->usber & (USB_TX_ERRMASK)) {
844 if (mpc8xx_udc_handle_txerr ()) {
845 /* Timeout, controlling function must retry send */
846 return -1;
847 }
848 }
849
850 if (usbp->usber & (USB_E_RESET | USB_E_BSY)) {
851 /* Fatal, abandon TX transaction */
852 return -2;
853 }
854
855 if (usbp->usber & USB_E_RXB) {
856 for (i = 0; i < RX_RING_SIZE; i++) {
857 if (!(rx_cbd[i]->cbd_sc & RX_BD_E)) {
858 if ((rx_cbd[i] == ep_ref[0].prx) || ep) {
859 return -2;
860 }
861 }
862 }
863 }
864
865 return 0;
866 }
867
868 /* mpc8xx_udc_ep_tx
869 *
870 * Transmit in a re-entrant fashion outbound USB packets.
871 * Implement retry/timeout mechanism described in USB specification
872 * Toggle DATA0/DATA1 pids as necessary
873 * Introduces non-standard tx_retry. The USB standard has no scope for slave
874 * devices to give up TX, however tx_retry stops us getting stuck in an endless
875 * TX loop.
876 */
877 static int mpc8xx_udc_ep_tx (struct usb_endpoint_instance *epi)
878 {
879 struct urb *urb = epi->tx_urb;
880 volatile cbd_t *tx_cbdp = 0;
881 unsigned int ep = 0, pkt_len = 0, x = 0, tx_retry = 0;
882 int ret = 0;
883
884 if (!epi || (epi->endpoint_address & 0x03) >= MAX_ENDPOINTS || !urb) {
885 return -1;
886 }
887
888 ep = epi->endpoint_address & 0x03;
889 tx_cbdp = (cbd_t *) (endpoints[ep]->tbptr + CONFIG_SYS_IMMR);
890
891 if (tx_cbdp->cbd_sc & TX_BD_R || usbp->usber & USB_E_TXB) {
892 mpc8xx_udc_flush_tx_fifo (ep);
893 usbp->usber |= USB_E_TXB;
894 };
895
896 while (tx_retry++ < 100) {
897 ret = mpc8xx_udc_tx_irq (ep);
898 if (ret == -1) {
899 /* ignore timeout here */
900 } else if (ret == -2) {
901 /* Abandon TX */
902 mpc8xx_udc_flush_tx_fifo (ep);
903 return -1;
904 }
905
906 tx_cbdp = (cbd_t *) (endpoints[ep]->tbptr + CONFIG_SYS_IMMR);
907 while (tx_cbdp->cbd_sc & TX_BD_R) {
908 };
909 tx_cbdp->cbd_sc = (tx_cbdp->cbd_sc & TX_BD_W);
910
911 pkt_len = urb->actual_length - epi->sent;
912
913 if (pkt_len > epi->tx_packetSize || pkt_len > EP_MAX_PKT) {
914 pkt_len = MIN (epi->tx_packetSize, EP_MAX_PKT);
915 }
916
917 for (x = 0; x < pkt_len; x++) {
918 *((unsigned char *) (tx_cbdp->cbd_bufaddr + x)) =
919 urb->buffer[epi->sent + x];
920 }
921 tx_cbdp->cbd_datlen = pkt_len;
922 tx_cbdp->cbd_sc |= (CBD_TX_BITMASK | ep_ref[ep].pid);
923 __asm__ ("eieio");
924
925 #ifdef __SIMULATE_ERROR__
926 if (++err_poison_test == 2) {
927 err_poison_test = 0;
928 tx_cbdp->cbd_sc &= ~TX_BD_TC;
929 }
930 #endif
931
932 usbp->uscom = (USCOM_STR | ep);
933
934 while (!(usbp->usber & USB_E_TXB)) {
935 ret = mpc8xx_udc_tx_irq (ep);
936 if (ret == -1) {
937 /* TX timeout */
938 break;
939 } else if (ret == -2) {
940 if (usbp->usber & USB_E_TXB) {
941 usbp->usber |= USB_E_TXB;
942 }
943 mpc8xx_udc_flush_tx_fifo (ep);
944 return -1;
945 }
946 };
947
948 if (usbp->usber & USB_E_TXB) {
949 usbp->usber |= USB_E_TXB;
950 }
951
952 /* ACK must be present <= 18bit times from TX */
953 if (ret == -1) {
954 continue;
955 }
956
957 /* TX ACK : USB 2.0 8.7.2, Toggle PID, Advance TX */
958 epi->sent += pkt_len;
959 epi->last = MIN (urb->actual_length - epi->sent, epi->tx_packetSize);
960 TOGGLE_TX_PID (ep_ref[ep].pid);
961
962 if (epi->sent >= epi->tx_urb->actual_length) {
963
964 epi->tx_urb->actual_length = 0;
965 epi->sent = 0;
966
967 if (ep_ref[ep].sc & EP_SEND_ZLP) {
968 ep_ref[ep].sc &= ~EP_SEND_ZLP;
969 } else {
970 return 0;
971 }
972 }
973 }
974
975 ERR ("TX fail, endpoint 0x%x tx bytes 0x%x/0x%x\n", ep, epi->sent,
976 epi->tx_urb->actual_length);
977
978 return -1;
979 }
980
981 /* mpc8xx_udc_dump_request
982 *
983 * Dump a control request to console
984 */
985 static void mpc8xx_udc_dump_request (struct usb_device_request *request)
986 {
987 DBG ("bmRequestType:%02x bRequest:%02x wValue:%04x "
988 "wIndex:%04x wLength:%04x ?\n",
989 request->bmRequestType,
990 request->bRequest,
991 request->wValue, request->wIndex, request->wLength);
992
993 return;
994 }
995
996 /* mpc8xx_udc_ep0_rx_setup
997 *
998 * Decode received ep0 SETUP packet. return non-zero on error
999 */
1000 static int mpc8xx_udc_ep0_rx_setup (volatile cbd_t * rx_cbdp)
1001 {
1002 unsigned int x = 0;
1003 struct urb *purb = ep_ref[0].urb;
1004 struct usb_endpoint_instance *epi =
1005 &udc_device->bus->endpoint_array[0];
1006
1007 for (; x < rx_cbdp->cbd_datlen; x++) {
1008 *(((unsigned char *) &ep_ref[0].urb->device_request) + x) =
1009 *((unsigned char *) (rx_cbdp->cbd_bufaddr + x));
1010 }
1011
1012 mpc8xx_udc_clear_rxbd (rx_cbdp);
1013
1014 if (ep0_recv_setup (purb)) {
1015 mpc8xx_udc_dump_request (&purb->device_request);
1016 return -1;
1017 }
1018
1019 if ((purb->device_request.bmRequestType & USB_REQ_DIRECTION_MASK)
1020 == USB_REQ_HOST2DEVICE) {
1021
1022 switch (purb->device_request.bRequest) {
1023 case USB_REQ_SET_ADDRESS:
1024 /* Send the Status OUT ZLP */
1025 ep_ref[0].pid = TX_BD_PID_DATA1;
1026 purb->actual_length = 0;
1027 mpc8xx_udc_init_tx (epi, purb);
1028 mpc8xx_udc_ep_tx (epi);
1029
1030 /* Move to the addressed state */
1031 usbp->usaddr = udc_device->address;
1032 mpc8xx_udc_state_transition_up (udc_device->device_state,
1033 STATE_ADDRESSED);
1034 return 0;
1035
1036 case USB_REQ_SET_CONFIGURATION:
1037 if (!purb->device_request.wValue) {
1038 /* Respond at default address */
1039 usbp->usaddr = 0x00;
1040 mpc8xx_udc_state_transition_down (udc_device->device_state,
1041 STATE_ADDRESSED);
1042 } else {
1043 /* TODO: Support multiple configurations */
1044 mpc8xx_udc_state_transition_up (udc_device->device_state,
1045 STATE_CONFIGURED);
1046 for (x = 1; x < MAX_ENDPOINTS; x++) {
1047 if ((udc_device->bus->endpoint_array[x].endpoint_address & USB_ENDPOINT_DIR_MASK)
1048 == USB_DIR_IN) {
1049 ep_ref[x].pid = TX_BD_PID_DATA0;
1050 } else {
1051 ep_ref[x].pid = RX_BD_PID_DATA0;
1052 }
1053 /* Set configuration must unstall endpoints */
1054 usbp->usep[x] &= ~STALL_BITMASK;
1055 }
1056 }
1057 break;
1058 default:
1059 /* CDC/Vendor specific */
1060 break;
1061 }
1062
1063 /* Send ZLP as ACK in Status OUT phase */
1064 ep_ref[0].pid = TX_BD_PID_DATA1;
1065 purb->actual_length = 0;
1066 mpc8xx_udc_init_tx (epi, purb);
1067 mpc8xx_udc_ep_tx (epi);
1068
1069 } else {
1070
1071 if (purb->actual_length) {
1072 ep_ref[0].pid = TX_BD_PID_DATA1;
1073 mpc8xx_udc_init_tx (epi, purb);
1074
1075 if (!(purb->actual_length % EP0_MAX_PACKET_SIZE)) {
1076 ep_ref[0].sc |= EP_SEND_ZLP;
1077 }
1078
1079 if (purb->device_request.wValue ==
1080 USB_DESCRIPTOR_TYPE_DEVICE) {
1081 if (le16_to_cpu (purb->device_request.wLength)
1082 > purb->actual_length) {
1083 /* Send EP0_MAX_PACKET_SIZE bytes
1084 * unless correct size requested.
1085 */
1086 if (purb->actual_length > epi->tx_packetSize) {
1087 purb->actual_length = epi->tx_packetSize;
1088 }
1089 }
1090 }
1091 mpc8xx_udc_ep_tx (epi);
1092
1093 } else {
1094 /* Corrupt SETUP packet? */
1095 ERR ("Zero length data or SETUP with DATA-IN phase ?\n");
1096 return 1;
1097 }
1098 }
1099 return 0;
1100 }
1101
1102 /* mpc8xx_udc_init_tx
1103 *
1104 * Setup some basic parameters for a TX transaction
1105 */
1106 static void mpc8xx_udc_init_tx (struct usb_endpoint_instance *epi,
1107 struct urb *tx_urb)
1108 {
1109 epi->sent = 0;
1110 epi->last = 0;
1111 epi->tx_urb = tx_urb;
1112 }
1113
1114 /* mpc8xx_udc_ep0_rx
1115 *
1116 * Receive ep0/control USB data. Parse and possibly send a response.
1117 */
1118 static void mpc8xx_udc_ep0_rx (volatile cbd_t * rx_cbdp)
1119 {
1120 if (rx_cbdp->cbd_sc & RX_BD_PID_SETUP) {
1121
1122 /* Unconditionally accept SETUP packets */
1123 if (mpc8xx_udc_ep0_rx_setup (rx_cbdp)) {
1124 mpc8xx_udc_stall (0);
1125 }
1126
1127 } else {
1128
1129 mpc8xx_udc_clear_rxbd (rx_cbdp);
1130
1131 if ((rx_cbdp->cbd_datlen - 2)) {
1132 /* SETUP with a DATA phase
1133 * outside of SETUP packet.
1134 * Reply with STALL.
1135 */
1136 mpc8xx_udc_stall (0);
1137 }
1138 }
1139 }
1140
1141 /* mpc8xx_udc_epn_rx
1142 *
1143 * Receive some data from cbd into USB system urb data abstraction
1144 * Upper layers should NAK if there is insufficient RX data space
1145 */
1146 static int mpc8xx_udc_epn_rx (unsigned int epid, volatile cbd_t * rx_cbdp)
1147 {
1148 struct usb_endpoint_instance *epi = 0;
1149 struct urb *urb = 0;
1150 unsigned int x = 0;
1151
1152 if (epid >= MAX_ENDPOINTS || !rx_cbdp->cbd_datlen) {
1153 return 0;
1154 }
1155
1156 /* USB 2.0 PDF section 8.6.4
1157 * Discard data with invalid PID it is a resend.
1158 */
1159 if (ep_ref[epid].pid != (rx_cbdp->cbd_sc & 0xC0)) {
1160 return 1;
1161 }
1162 TOGGLE_RX_PID (ep_ref[epid].pid);
1163
1164 epi = &udc_device->bus->endpoint_array[epid];
1165 urb = epi->rcv_urb;
1166
1167 for (; x < (rx_cbdp->cbd_datlen - 2); x++) {
1168 *((unsigned char *) (urb->buffer + urb->actual_length + x)) =
1169 *((unsigned char *) (rx_cbdp->cbd_bufaddr + x));
1170 }
1171
1172 if (x) {
1173 usbd_rcv_complete (epi, x, 0);
1174 if (ep_ref[epid].urb->status == RECV_ERROR) {
1175 DBG ("RX error unset NAK\n");
1176 udc_unset_nak (epid);
1177 }
1178 }
1179 return x;
1180 }
1181
1182 /* mpc8xx_udc_clock_init
1183 *
1184 * Obtain a clock reference for Full Speed Signaling
1185 */
1186 static void mpc8xx_udc_clock_init (volatile immap_t * immr,
1187 volatile cpm8xx_t * cp)
1188 {
1189
1190 #if defined(CONFIG_SYS_USB_EXTC_CLK)
1191
1192 /* This has been tested with a 48MHz crystal on CLK6 */
1193 switch (CONFIG_SYS_USB_EXTC_CLK) {
1194 case 1:
1195 immr->im_ioport.iop_papar |= 0x0100;
1196 immr->im_ioport.iop_padir &= ~0x0100;
1197 cp->cp_sicr |= 0x24;
1198 break;
1199 case 2:
1200 immr->im_ioport.iop_papar |= 0x0200;
1201 immr->im_ioport.iop_padir &= ~0x0200;
1202 cp->cp_sicr |= 0x2D;
1203 break;
1204 case 3:
1205 immr->im_ioport.iop_papar |= 0x0400;
1206 immr->im_ioport.iop_padir &= ~0x0400;
1207 cp->cp_sicr |= 0x36;
1208 break;
1209 case 4:
1210 immr->im_ioport.iop_papar |= 0x0800;
1211 immr->im_ioport.iop_padir &= ~0x0800;
1212 cp->cp_sicr |= 0x3F;
1213 break;
1214 default:
1215 udc_state = STATE_ERROR;
1216 break;
1217 }
1218
1219 #elif defined(CONFIG_SYS_USB_BRGCLK)
1220
1221 /* This has been tested with brgclk == 50MHz */
1222 int divisor = 0;
1223
1224 if (gd->cpu_clk < 48000000L) {
1225 ERR ("brgclk is too slow for full-speed USB!\n");
1226 udc_state = STATE_ERROR;
1227 return;
1228 }
1229
1230 /* Assume the brgclk is 'good enough', we want !(gd->cpu_clk%48Mhz)
1231 * but, can /probably/ live with close-ish alternative rates.
1232 */
1233 divisor = (gd->cpu_clk / 48000000L) - 1;
1234 cp->cp_sicr &= ~0x0000003F;
1235
1236 switch (CONFIG_SYS_USB_BRGCLK) {
1237 case 1:
1238 cp->cp_brgc1 |= (divisor | CPM_BRG_EN);
1239 cp->cp_sicr &= ~0x2F;
1240 break;
1241 case 2:
1242 cp->cp_brgc2 |= (divisor | CPM_BRG_EN);
1243 cp->cp_sicr |= 0x00000009;
1244 break;
1245 case 3:
1246 cp->cp_brgc3 |= (divisor | CPM_BRG_EN);
1247 cp->cp_sicr |= 0x00000012;
1248 break;
1249 case 4:
1250 cp->cp_brgc4 = (divisor | CPM_BRG_EN);
1251 cp->cp_sicr |= 0x0000001B;
1252 break;
1253 default:
1254 udc_state = STATE_ERROR;
1255 break;
1256 }
1257
1258 #else
1259 #error "CONFIG_SYS_USB_EXTC_CLK or CONFIG_SYS_USB_BRGCLK must be defined"
1260 #endif
1261
1262 }
1263
1264 /* mpc8xx_udc_cbd_attach
1265 *
1266 * attach a cbd to and endpoint
1267 */
1268 static void mpc8xx_udc_cbd_attach (int ep, uchar tx_size, uchar rx_size)
1269 {
1270
1271 if (!tx_cbd[ep] || !rx_cbd[ep] || ep >= MAX_ENDPOINTS) {
1272 udc_state = STATE_ERROR;
1273 return;
1274 }
1275
1276 if (tx_size > USB_MAX_PKT || rx_size > USB_MAX_PKT ||
1277 (!tx_size && !rx_size)) {
1278 udc_state = STATE_ERROR;
1279 return;
1280 }
1281
1282 /* Attach CBD to appropiate Parameter RAM Endpoint data structure */
1283 if (rx_size) {
1284 endpoints[ep]->rbase = (u32) rx_cbd[rx_ct];
1285 endpoints[ep]->rbptr = (u32) rx_cbd[rx_ct];
1286 rx_ct++;
1287
1288 if (!ep) {
1289
1290 endpoints[ep]->rbptr = (u32) rx_cbd[rx_ct];
1291 rx_cbd[rx_ct]->cbd_sc |= RX_BD_W;
1292 rx_ct++;
1293
1294 } else {
1295 rx_ct += 2;
1296 endpoints[ep]->rbptr = (u32) rx_cbd[rx_ct];
1297 rx_cbd[rx_ct]->cbd_sc |= RX_BD_W;
1298 rx_ct++;
1299 }
1300
1301 /* Where we expect to RX data on this endpoint */
1302 ep_ref[ep].prx = rx_cbd[rx_ct - 1];
1303 } else {
1304
1305 ep_ref[ep].prx = 0;
1306 endpoints[ep]->rbase = 0;
1307 endpoints[ep]->rbptr = 0;
1308 }
1309
1310 if (tx_size) {
1311 endpoints[ep]->tbase = (u32) tx_cbd[tx_ct];
1312 endpoints[ep]->tbptr = (u32) tx_cbd[tx_ct];
1313 tx_ct++;
1314 } else {
1315 endpoints[ep]->tbase = 0;
1316 endpoints[ep]->tbptr = 0;
1317 }
1318
1319 endpoints[ep]->tstate = 0;
1320 endpoints[ep]->tbcnt = 0;
1321 endpoints[ep]->mrblr = EP_MAX_PKT;
1322 endpoints[ep]->rfcr = 0x18;
1323 endpoints[ep]->tfcr = 0x18;
1324 ep_ref[ep].sc |= EP_ATTACHED;
1325
1326 DBG ("ep %d rbase 0x%08x rbptr 0x%08x tbase 0x%08x tbptr 0x%08x prx = %p\n",
1327 ep, endpoints[ep]->rbase, endpoints[ep]->rbptr,
1328 endpoints[ep]->tbase, endpoints[ep]->tbptr,
1329 ep_ref[ep].prx);
1330
1331 return;
1332 }
1333
1334 /* mpc8xx_udc_cbd_init
1335 *
1336 * Allocate space for a cbd and allocate TX/RX data space
1337 */
1338 static void mpc8xx_udc_cbd_init (void)
1339 {
1340 int i = 0;
1341
1342 for (; i < TX_RING_SIZE; i++) {
1343 tx_cbd[i] = (cbd_t *)
1344 mpc8xx_udc_alloc (sizeof (cbd_t), sizeof (int));
1345 }
1346
1347 for (i = 0; i < RX_RING_SIZE; i++) {
1348 rx_cbd[i] = (cbd_t *)
1349 mpc8xx_udc_alloc (sizeof (cbd_t), sizeof (int));
1350 }
1351
1352 for (i = 0; i < TX_RING_SIZE; i++) {
1353 tx_cbd[i]->cbd_bufaddr =
1354 mpc8xx_udc_alloc (EP_MAX_PKT, sizeof (int));
1355
1356 tx_cbd[i]->cbd_sc = (TX_BD_I | TX_BD_W);
1357 tx_cbd[i]->cbd_datlen = 0x0000;
1358 }
1359
1360
1361 for (i = 0; i < RX_RING_SIZE; i++) {
1362 rx_cbd[i]->cbd_bufaddr =
1363 mpc8xx_udc_alloc (EP_MAX_PKT, sizeof (int));
1364 rx_cbd[i]->cbd_sc = (RX_BD_I | RX_BD_E);
1365 rx_cbd[i]->cbd_datlen = 0x0000;
1366
1367 }
1368
1369 return;
1370 }
1371
1372 /* mpc8xx_udc_endpoint_init
1373 *
1374 * Attach an endpoint to some dpram
1375 */
1376 static void mpc8xx_udc_endpoint_init (void)
1377 {
1378 int i = 0;
1379
1380 for (; i < MAX_ENDPOINTS; i++) {
1381 endpoints[i] = (usb_epb_t *)
1382 mpc8xx_udc_alloc (sizeof (usb_epb_t), 32);
1383 }
1384 }
1385
1386 /* mpc8xx_udc_alloc
1387 *
1388 * Grab the address of some dpram
1389 */
1390 static u32 mpc8xx_udc_alloc (u32 data_size, u32 alignment)
1391 {
1392 u32 retaddr = address_base;
1393
1394 while (retaddr % alignment) {
1395 retaddr++;
1396 }
1397 address_base += data_size;
1398
1399 return retaddr;
1400 }
1401
1402 #endif /* CONFIG_MPC885_FAMILY && CONFIG_USB_DEVICE) */
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