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1 /*
2  * URB OHCI HCD (Host Controller Driver) for USB on the MPC5200.
3  *
4  * (C) Copyright 2003-2004
5  * Gary Jennejohn, DENX Software Engineering <gj@denx.de>
6  *
7  * (C) Copyright 2004
8  * Pierre Aubert, Staubli Faverges <p.aubert@staubli.com>
9  *
10  * Note: Much of this code has been derived from Linux 2.4
11  * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
12  * (C) Copyright 2000-2002 David Brownell
13  *
14  * See file CREDITS for list of people who contributed to this
15  * project.
16  *
17  * This program is free software; you can redistribute it and/or
18  * modify it under the terms of the GNU General Public License as
19  * published by the Free Software Foundation; either version 2 of
20  * the License, or (at your option) any later version.
21  *
22  * This program is distributed in the hope that it will be useful,
23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
25  * GNU General Public License for more details.
26  *
27  * You should have received a copy of the GNU General Public License
28  * along with this program; if not, write to the Free Software
29  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
30  * MA 02111-1307 USA
31  *
32  */
33 /*
34  * IMPORTANT NOTES
35  * 1 - this driver is intended for use with USB Mass Storage Devices
36  *     (BBB) ONLY. There is NO support for Interrupt or Isochronous pipes!
37  */
38
39 #include <common.h>
40
41 #ifdef CONFIG_USB_OHCI
42
43 #include <malloc.h>
44 #include <usb.h>
45 #include "usb_ohci.h"
46
47 #include <mpc5xxx.h>
48
49 #define OHCI_USE_NPS            /* force NoPowerSwitching mode */
50 #undef OHCI_VERBOSE_DEBUG       /* not always helpful */
51 #undef DEBUG
52 #undef SHOW_INFO
53 #undef OHCI_FILL_TRACE
54
55 /* For initializing controller (mask in an HCFS mode too) */
56 #define OHCI_CONTROL_INIT \
57         (OHCI_CTRL_CBSR & 0x3) | OHCI_CTRL_IE | OHCI_CTRL_PLE
58
59 #define readl(a) (*((vu_long *)(a)))
60 #define writel(a, b) (*((vu_long *)(b)) = ((vu_long)a))
61
62 #define min_t(type,x,y) ({ type __x = (x); type __y = (y); __x < __y ? __x: __y; })
63
64 #ifdef DEBUG
65 #define dbg(format, arg...) printf("DEBUG: " format "\n", ## arg)
66 #else
67 #define dbg(format, arg...) do {} while(0)
68 #endif /* DEBUG */
69 #define err(format, arg...) printf("ERROR: " format "\n", ## arg)
70 #ifdef SHOW_INFO
71 #define info(format, arg...) printf("INFO: " format "\n", ## arg)
72 #else
73 #define info(format, arg...) do {} while(0)
74 #endif
75
76 #define m16_swap(x) swap_16(x)
77 #define m32_swap(x) swap_32(x)
78
79 #ifdef CONFIG_MPC5200
80 #define ohci_cpu_to_le16(x) (x)
81 #define ohci_cpu_to_le32(x) (x)
82 #else
83 #define ohci_cpu_to_le16(x) swap_16(x)
84 #define ohci_cpu_to_le32(x) swap_32(x)
85 #endif
86
87 /* global ohci_t */
88 static ohci_t gohci;
89 /* this must be aligned to a 256 byte boundary */
90 struct ohci_hcca ghcca[1];
91 /* a pointer to the aligned storage */
92 struct ohci_hcca *phcca;
93 /* this allocates EDs for all possible endpoints */
94 struct ohci_device ohci_dev;
95 /* urb_priv */
96 urb_priv_t urb_priv;
97 /* RHSC flag */
98 int got_rhsc;
99 /* device which was disconnected */
100 struct usb_device *devgone;
101 /* flag guarding URB transation */
102 int urb_finished = 0;
103
104 /*-------------------------------------------------------------------------*/
105
106 /* AMD-756 (D2 rev) reports corrupt register contents in some cases.
107  * The erratum (#4) description is incorrect.  AMD's workaround waits
108  * till some bits (mostly reserved) are clear; ok for all revs.
109  */
110 #define OHCI_QUIRK_AMD756 0xabcd
111 #define read_roothub(hc, register, mask) ({ \
112         u32 temp = readl (&hc->regs->roothub.register); \
113         if (hc->flags & OHCI_QUIRK_AMD756) \
114                 while (temp & mask) \
115                         temp = readl (&hc->regs->roothub.register); \
116         temp; })
117
118 static u32 roothub_a (struct ohci *hc)
119         { return read_roothub (hc, a, 0xfc0fe000); }
120 static inline u32 roothub_b (struct ohci *hc)
121         { return readl (&hc->regs->roothub.b); }
122 static inline u32 roothub_status (struct ohci *hc)
123         { return readl (&hc->regs->roothub.status); }
124 static u32 roothub_portstatus (struct ohci *hc, int i)
125         { return read_roothub (hc, portstatus [i], 0xffe0fce0); }
126
127
128 /* forward declaration */
129 static int hc_interrupt (void);
130 static void
131 td_submit_job (struct usb_device * dev, unsigned long pipe, void * buffer,
132         int transfer_len, struct devrequest * setup, urb_priv_t * urb, int interval);
133
134 /*-------------------------------------------------------------------------*
135  * URB support functions
136  *-------------------------------------------------------------------------*/
137
138 /* free HCD-private data associated with this URB */
139
140 static void urb_free_priv (urb_priv_t * urb)
141 {
142         int             i;
143         int             last;
144         struct td       * td;
145
146         last = urb->length - 1;
147         if (last >= 0) {
148                 for (i = 0; i <= last; i++) {
149                         td = urb->td[i];
150                         if (td) {
151                                 td->usb_dev = NULL;
152                                 urb->td[i] = NULL;
153                         }
154                 }
155         }
156 }
157
158 /*-------------------------------------------------------------------------*/
159
160 #ifdef DEBUG
161 static int sohci_get_current_frame_number (struct usb_device * dev);
162
163 /* debug| print the main components of an URB
164  * small: 0) header + data packets 1) just header */
165
166 static void pkt_print (struct usb_device * dev, unsigned long pipe, void * buffer,
167         int transfer_len, struct devrequest * setup, char * str, int small)
168 {
169         urb_priv_t * purb = &urb_priv;
170
171         dbg("%s URB:[%4x] dev:%2d,ep:%2d-%c,type:%s,len:%d/%d stat:%#lx",
172                         str,
173                         sohci_get_current_frame_number (dev),
174                         usb_pipedevice (pipe),
175                         usb_pipeendpoint (pipe),
176                         usb_pipeout (pipe)? 'O': 'I',
177                         usb_pipetype (pipe) < 2? (usb_pipeint (pipe)? "INTR": "ISOC"):
178                                 (usb_pipecontrol (pipe)? "CTRL": "BULK"),
179                         purb->actual_length,
180                         transfer_len, dev->status);
181 #ifdef  OHCI_VERBOSE_DEBUG
182         if (!small) {
183                 int i, len;
184
185                 if (usb_pipecontrol (pipe)) {
186                         printf (__FILE__ ": cmd(8):");
187                         for (i = 0; i < 8 ; i++)
188                                 printf (" %02x", ((__u8 *) setup) [i]);
189                         printf ("\n");
190                 }
191                 if (transfer_len > 0 && buffer) {
192                         printf (__FILE__ ": data(%d/%d):",
193                                 purb->actual_length,
194                                 transfer_len);
195                         len = usb_pipeout (pipe)?
196                                         transfer_len: purb->actual_length;
197                         for (i = 0; i < 16 && i < len; i++)
198                                 printf (" %02x", ((__u8 *) buffer) [i]);
199                         printf ("%s\n", i < len? "...": "");
200                 }
201         }
202 #endif
203 }
204
205 /* just for debugging; prints non-empty branches of the int ed tree inclusive iso eds*/
206 void ep_print_int_eds (ohci_t *ohci, char * str) {
207         int i, j;
208          __u32 * ed_p;
209         for (i= 0; i < 32; i++) {
210                 j = 5;
211                 ed_p = &(ohci->hcca->int_table [i]);
212                 if (*ed_p == 0)
213                     continue;
214                 printf (__FILE__ ": %s branch int %2d(%2x):", str, i, i);
215                 while (*ed_p != 0 && j--) {
216                         ed_t *ed = (ed_t *)ohci_cpu_to_le32(ed_p);
217                         printf (" ed: %4x;", ed->hwINFO);
218                         ed_p = &ed->hwNextED;
219                 }
220                 printf ("\n");
221         }
222 }
223
224 static void ohci_dump_intr_mask (char *label, __u32 mask)
225 {
226         dbg ("%s: 0x%08x%s%s%s%s%s%s%s%s%s",
227                 label,
228                 mask,
229                 (mask & OHCI_INTR_MIE) ? " MIE" : "",
230                 (mask & OHCI_INTR_OC) ? " OC" : "",
231                 (mask & OHCI_INTR_RHSC) ? " RHSC" : "",
232                 (mask & OHCI_INTR_FNO) ? " FNO" : "",
233                 (mask & OHCI_INTR_UE) ? " UE" : "",
234                 (mask & OHCI_INTR_RD) ? " RD" : "",
235                 (mask & OHCI_INTR_SF) ? " SF" : "",
236                 (mask & OHCI_INTR_WDH) ? " WDH" : "",
237                 (mask & OHCI_INTR_SO) ? " SO" : ""
238                 );
239 }
240
241 static void maybe_print_eds (char *label, __u32 value)
242 {
243         ed_t *edp = (ed_t *)value;
244
245         if (value) {
246                 dbg ("%s %08x", label, value);
247                 dbg ("%08x", edp->hwINFO);
248                 dbg ("%08x", edp->hwTailP);
249                 dbg ("%08x", edp->hwHeadP);
250                 dbg ("%08x", edp->hwNextED);
251         }
252 }
253
254 static char * hcfs2string (int state)
255 {
256         switch (state) {
257                 case OHCI_USB_RESET:    return "reset";
258                 case OHCI_USB_RESUME:   return "resume";
259                 case OHCI_USB_OPER:     return "operational";
260                 case OHCI_USB_SUSPEND:  return "suspend";
261         }
262         return "?";
263 }
264
265 /* dump control and status registers */
266 static void ohci_dump_status (ohci_t *controller)
267 {
268         struct ohci_regs        *regs = controller->regs;
269         __u32                   temp;
270
271         temp = readl (&regs->revision) & 0xff;
272         if (temp != 0x10)
273                 dbg ("spec %d.%d", (temp >> 4), (temp & 0x0f));
274
275         temp = readl (&regs->control);
276         dbg ("control: 0x%08x%s%s%s HCFS=%s%s%s%s%s CBSR=%d", temp,
277                 (temp & OHCI_CTRL_RWE) ? " RWE" : "",
278                 (temp & OHCI_CTRL_RWC) ? " RWC" : "",
279                 (temp & OHCI_CTRL_IR) ? " IR" : "",
280                 hcfs2string (temp & OHCI_CTRL_HCFS),
281                 (temp & OHCI_CTRL_BLE) ? " BLE" : "",
282                 (temp & OHCI_CTRL_CLE) ? " CLE" : "",
283                 (temp & OHCI_CTRL_IE) ? " IE" : "",
284                 (temp & OHCI_CTRL_PLE) ? " PLE" : "",
285                 temp & OHCI_CTRL_CBSR
286                 );
287
288         temp = readl (&regs->cmdstatus);
289         dbg ("cmdstatus: 0x%08x SOC=%d%s%s%s%s", temp,
290                 (temp & OHCI_SOC) >> 16,
291                 (temp & OHCI_OCR) ? " OCR" : "",
292                 (temp & OHCI_BLF) ? " BLF" : "",
293                 (temp & OHCI_CLF) ? " CLF" : "",
294                 (temp & OHCI_HCR) ? " HCR" : ""
295                 );
296
297         ohci_dump_intr_mask ("intrstatus", readl (&regs->intrstatus));
298         ohci_dump_intr_mask ("intrenable", readl (&regs->intrenable));
299
300         maybe_print_eds ("ed_periodcurrent", readl (&regs->ed_periodcurrent));
301
302         maybe_print_eds ("ed_controlhead", readl (&regs->ed_controlhead));
303         maybe_print_eds ("ed_controlcurrent", readl (&regs->ed_controlcurrent));
304
305         maybe_print_eds ("ed_bulkhead", readl (&regs->ed_bulkhead));
306         maybe_print_eds ("ed_bulkcurrent", readl (&regs->ed_bulkcurrent));
307
308         maybe_print_eds ("donehead", readl (&regs->donehead));
309 }
310
311 static void ohci_dump_roothub (ohci_t *controller, int verbose)
312 {
313         __u32                   temp, ndp, i;
314
315         temp = roothub_a (controller);
316         ndp = (temp & RH_A_NDP);
317
318         if (verbose) {
319                 dbg ("roothub.a: %08x POTPGT=%d%s%s%s%s%s NDP=%d", temp,
320                         ((temp & RH_A_POTPGT) >> 24) & 0xff,
321                         (temp & RH_A_NOCP) ? " NOCP" : "",
322                         (temp & RH_A_OCPM) ? " OCPM" : "",
323                         (temp & RH_A_DT) ? " DT" : "",
324                         (temp & RH_A_NPS) ? " NPS" : "",
325                         (temp & RH_A_PSM) ? " PSM" : "",
326                         ndp
327                         );
328                 temp = roothub_b (controller);
329                 dbg ("roothub.b: %08x PPCM=%04x DR=%04x",
330                         temp,
331                         (temp & RH_B_PPCM) >> 16,
332                         (temp & RH_B_DR)
333                         );
334                 temp = roothub_status (controller);
335                 dbg ("roothub.status: %08x%s%s%s%s%s%s",
336                         temp,
337                         (temp & RH_HS_CRWE) ? " CRWE" : "",
338                         (temp & RH_HS_OCIC) ? " OCIC" : "",
339                         (temp & RH_HS_LPSC) ? " LPSC" : "",
340                         (temp & RH_HS_DRWE) ? " DRWE" : "",
341                         (temp & RH_HS_OCI) ? " OCI" : "",
342                         (temp & RH_HS_LPS) ? " LPS" : ""
343                         );
344         }
345
346         for (i = 0; i < ndp; i++) {
347                 temp = roothub_portstatus (controller, i);
348                 dbg ("roothub.portstatus [%d] = 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s",
349                         i,
350                         temp,
351                         (temp & RH_PS_PRSC) ? " PRSC" : "",
352                         (temp & RH_PS_OCIC) ? " OCIC" : "",
353                         (temp & RH_PS_PSSC) ? " PSSC" : "",
354                         (temp & RH_PS_PESC) ? " PESC" : "",
355                         (temp & RH_PS_CSC) ? " CSC" : "",
356
357                         (temp & RH_PS_LSDA) ? " LSDA" : "",
358                         (temp & RH_PS_PPS) ? " PPS" : "",
359                         (temp & RH_PS_PRS) ? " PRS" : "",
360                         (temp & RH_PS_POCI) ? " POCI" : "",
361                         (temp & RH_PS_PSS) ? " PSS" : "",
362
363                         (temp & RH_PS_PES) ? " PES" : "",
364                         (temp & RH_PS_CCS) ? " CCS" : ""
365                         );
366         }
367 }
368
369 static void ohci_dump (ohci_t *controller, int verbose)
370 {
371         dbg ("OHCI controller usb-%s state", controller->slot_name);
372
373         /* dumps some of the state we know about */
374         ohci_dump_status (controller);
375         if (verbose)
376                 ep_print_int_eds (controller, "hcca");
377         dbg ("hcca frame #%04x", controller->hcca->frame_no);
378         ohci_dump_roothub (controller, 1);
379 }
380
381
382 #endif /* DEBUG */
383
384 /*-------------------------------------------------------------------------*
385  * Interface functions (URB)
386  *-------------------------------------------------------------------------*/
387
388 /* get a transfer request */
389
390 int sohci_submit_job(struct usb_device *dev, unsigned long pipe, void *buffer,
391                 int transfer_len, struct devrequest *setup, int interval)
392 {
393         ohci_t *ohci;
394         ed_t * ed;
395         urb_priv_t *purb_priv;
396         int i, size = 0;
397
398         ohci = &gohci;
399
400         /* when controller's hung, permit only roothub cleanup attempts
401          * such as powering down ports */
402         if (ohci->disabled) {
403                 err("sohci_submit_job: EPIPE");
404                 return -1;
405         }
406
407         /* if we have an unfinished URB from previous transaction let's
408          * fail and scream as quickly as possible so as not to corrupt
409          * further communication */
410         if (!urb_finished) {
411                 err("sohci_submit_job: URB NOT FINISHED");
412                 return -1;
413         }
414         /* we're about to begin a new transaction here so mark the URB unfinished */
415         urb_finished = 0;
416
417         /* every endpoint has a ed, locate and fill it */
418         if (!(ed = ep_add_ed (dev, pipe))) {
419                 err("sohci_submit_job: ENOMEM");
420                 return -1;
421         }
422
423         /* for the private part of the URB we need the number of TDs (size) */
424         switch (usb_pipetype (pipe)) {
425                 case PIPE_BULK: /* one TD for every 4096 Byte */
426                         size = (transfer_len - 1) / 4096 + 1;
427                         break;
428                 case PIPE_CONTROL: /* 1 TD for setup, 1 for ACK and 1 for every 4096 B */
429                         size = (transfer_len == 0)? 2:
430                                                 (transfer_len - 1) / 4096 + 3;
431                         break;
432         }
433
434         if (size >= (N_URB_TD - 1)) {
435                 err("need %d TDs, only have %d", size, N_URB_TD);
436                 return -1;
437         }
438         purb_priv = &urb_priv;
439         purb_priv->pipe = pipe;
440
441         /* fill the private part of the URB */
442         purb_priv->length = size;
443         purb_priv->ed = ed;
444         purb_priv->actual_length = 0;
445
446         /* allocate the TDs */
447         /* note that td[0] was allocated in ep_add_ed */
448         for (i = 0; i < size; i++) {
449                 purb_priv->td[i] = td_alloc (dev);
450                 if (!purb_priv->td[i]) {
451                         purb_priv->length = i;
452                         urb_free_priv (purb_priv);
453                         err("sohci_submit_job: ENOMEM");
454                         return -1;
455                 }
456         }
457
458         if (ed->state == ED_NEW || (ed->state & ED_DEL)) {
459                 urb_free_priv (purb_priv);
460                 err("sohci_submit_job: EINVAL");
461                 return -1;
462         }
463
464         /* link the ed into a chain if is not already */
465         if (ed->state != ED_OPER)
466                 ep_link (ohci, ed);
467
468         /* fill the TDs and link it to the ed */
469         td_submit_job(dev, pipe, buffer, transfer_len, setup, purb_priv, interval);
470
471         return 0;
472 }
473
474 /*-------------------------------------------------------------------------*/
475
476 #ifdef DEBUG
477 /* tell us the current USB frame number */
478
479 static int sohci_get_current_frame_number (struct usb_device *usb_dev)
480 {
481         ohci_t *ohci = &gohci;
482
483         return ohci_cpu_to_le16 (ohci->hcca->frame_no);
484 }
485 #endif
486
487 /*-------------------------------------------------------------------------*
488  * ED handling functions
489  *-------------------------------------------------------------------------*/
490
491 /* link an ed into one of the HC chains */
492
493 static int ep_link (ohci_t *ohci, ed_t *edi)
494 {
495         volatile ed_t *ed = edi;
496
497         ed->state = ED_OPER;
498
499         switch (ed->type) {
500         case PIPE_CONTROL:
501                 ed->hwNextED = 0;
502                 if (ohci->ed_controltail == NULL) {
503                         writel (ed, &ohci->regs->ed_controlhead);
504                 } else {
505                         ohci->ed_controltail->hwNextED = ohci_cpu_to_le32 ((unsigned long)ed);
506                 }
507                 ed->ed_prev = ohci->ed_controltail;
508                 if (!ohci->ed_controltail && !ohci->ed_rm_list[0] &&
509                         !ohci->ed_rm_list[1] && !ohci->sleeping) {
510                         ohci->hc_control |= OHCI_CTRL_CLE;
511                         writel (ohci->hc_control, &ohci->regs->control);
512                 }
513                 ohci->ed_controltail = edi;
514                 break;
515
516         case PIPE_BULK:
517                 ed->hwNextED = 0;
518                 if (ohci->ed_bulktail == NULL) {
519                         writel (ed, &ohci->regs->ed_bulkhead);
520                 } else {
521                         ohci->ed_bulktail->hwNextED = ohci_cpu_to_le32 ((unsigned long)ed);
522                 }
523                 ed->ed_prev = ohci->ed_bulktail;
524                 if (!ohci->ed_bulktail && !ohci->ed_rm_list[0] &&
525                         !ohci->ed_rm_list[1] && !ohci->sleeping) {
526                         ohci->hc_control |= OHCI_CTRL_BLE;
527                         writel (ohci->hc_control, &ohci->regs->control);
528                 }
529                 ohci->ed_bulktail = edi;
530                 break;
531         }
532         return 0;
533 }
534
535 /*-------------------------------------------------------------------------*/
536
537 /* unlink an ed from one of the HC chains.
538  * just the link to the ed is unlinked.
539  * the link from the ed still points to another operational ed or 0
540  * so the HC can eventually finish the processing of the unlinked ed */
541
542 static int ep_unlink (ohci_t *ohci, ed_t *edi)
543 {
544         volatile ed_t *ed = edi;
545
546         ed->hwINFO |= ohci_cpu_to_le32 (OHCI_ED_SKIP);
547
548         switch (ed->type) {
549         case PIPE_CONTROL:
550                 if (ed->ed_prev == NULL) {
551                         if (!ed->hwNextED) {
552                                 ohci->hc_control &= ~OHCI_CTRL_CLE;
553                                 writel (ohci->hc_control, &ohci->regs->control);
554                         }
555                         writel (ohci_cpu_to_le32 (*((__u32 *)&ed->hwNextED)), &ohci->regs->ed_controlhead);
556                 } else {
557                         ed->ed_prev->hwNextED = ed->hwNextED;
558                 }
559                 if (ohci->ed_controltail == ed) {
560                         ohci->ed_controltail = ed->ed_prev;
561                 } else {
562                         ((ed_t *)ohci_cpu_to_le32 (*((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;
563                 }
564                 break;
565
566         case PIPE_BULK:
567                 if (ed->ed_prev == NULL) {
568                         if (!ed->hwNextED) {
569                                 ohci->hc_control &= ~OHCI_CTRL_BLE;
570                                 writel (ohci->hc_control, &ohci->regs->control);
571                         }
572                         writel (ohci_cpu_to_le32 (*((__u32 *)&ed->hwNextED)), &ohci->regs->ed_bulkhead);
573                 } else {
574                         ed->ed_prev->hwNextED = ed->hwNextED;
575                 }
576                 if (ohci->ed_bulktail == ed) {
577                         ohci->ed_bulktail = ed->ed_prev;
578                 } else {
579                         ((ed_t *)ohci_cpu_to_le32 (*((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;
580                 }
581                 break;
582         }
583         ed->state = ED_UNLINK;
584         return 0;
585 }
586
587
588 /*-------------------------------------------------------------------------*/
589
590 /* add/reinit an endpoint; this should be done once at the usb_set_configuration command,
591  * but the USB stack is a little bit stateless  so we do it at every transaction
592  * if the state of the ed is ED_NEW then a dummy td is added and the state is changed to ED_UNLINK
593  * in all other cases the state is left unchanged
594  * the ed info fields are setted anyway even though most of them should not change */
595
596 static ed_t * ep_add_ed (struct usb_device *usb_dev, unsigned long pipe)
597 {
598         td_t *td;
599         ed_t *ed_ret;
600         volatile ed_t *ed;
601
602         ed = ed_ret = &ohci_dev.ed[(usb_pipeendpoint (pipe) << 1) |
603                         (usb_pipecontrol (pipe)? 0: usb_pipeout (pipe))];
604
605         if ((ed->state & ED_DEL) || (ed->state & ED_URB_DEL)) {
606                 err("ep_add_ed: pending delete");
607                 /* pending delete request */
608                 return NULL;
609         }
610
611         if (ed->state == ED_NEW) {
612                 ed->hwINFO = ohci_cpu_to_le32 (OHCI_ED_SKIP); /* skip ed */
613                 /* dummy td; end of td list for ed */
614                 td = td_alloc (usb_dev);
615                 ed->hwTailP = ohci_cpu_to_le32 ((unsigned long)td);
616                 ed->hwHeadP = ed->hwTailP;
617                 ed->state = ED_UNLINK;
618                 ed->type = usb_pipetype (pipe);
619                 ohci_dev.ed_cnt++;
620         }
621
622         ed->hwINFO = ohci_cpu_to_le32 (usb_pipedevice (pipe)
623                         | usb_pipeendpoint (pipe) << 7
624                         | (usb_pipeisoc (pipe)? 0x8000: 0)
625                         | (usb_pipecontrol (pipe)? 0: (usb_pipeout (pipe)? 0x800: 0x1000))
626                         | usb_pipeslow (pipe) << 13
627                         | usb_maxpacket (usb_dev, pipe) << 16);
628
629         return ed_ret;
630 }
631
632 /*-------------------------------------------------------------------------*
633  * TD handling functions
634  *-------------------------------------------------------------------------*/
635
636 /* enqueue next TD for this URB (OHCI spec 5.2.8.2) */
637
638 static void td_fill (ohci_t *ohci, unsigned int info,
639         void *data, int len,
640         struct usb_device *dev, int index, urb_priv_t *urb_priv)
641 {
642         volatile td_t  *td, *td_pt;
643 #ifdef OHCI_FILL_TRACE
644         int i;
645 #endif
646
647         if (index > urb_priv->length) {
648                 err("index > length");
649                 return;
650         }
651         /* use this td as the next dummy */
652         td_pt = urb_priv->td [index];
653         td_pt->hwNextTD = 0;
654
655         /* fill the old dummy TD */
656         td = urb_priv->td [index] = (td_t *)(ohci_cpu_to_le32 (urb_priv->ed->hwTailP) & ~0xf);
657
658         td->ed = urb_priv->ed;
659         td->next_dl_td = NULL;
660         td->index = index;
661         td->data = (__u32)data;
662 #ifdef OHCI_FILL_TRACE
663         if ((usb_pipetype(urb_priv->pipe) == PIPE_BULK) && usb_pipeout(urb_priv->pipe)) {
664                 for (i = 0; i < len; i++)
665                 printf("td->data[%d] %#2x ",i, ((unsigned char *)td->data)[i]);
666                 printf("\n");
667         }
668 #endif
669         if (!len)
670                 data = 0;
671
672         td->hwINFO = ohci_cpu_to_le32 (info);
673         td->hwCBP = ohci_cpu_to_le32 ((unsigned long)data);
674         if (data)
675                 td->hwBE = ohci_cpu_to_le32 ((unsigned long)(data + len - 1));
676         else
677                 td->hwBE = 0;
678         td->hwNextTD = ohci_cpu_to_le32 ((unsigned long)td_pt);
679
680         /* append to queue */
681         td->ed->hwTailP = td->hwNextTD;
682 }
683
684 /*-------------------------------------------------------------------------*/
685
686 /* prepare all TDs of a transfer */
687 static void td_submit_job (struct usb_device *dev, unsigned long pipe, void *buffer,
688         int transfer_len, struct devrequest *setup, urb_priv_t *urb, int interval)
689 {
690         ohci_t *ohci = &gohci;
691         int data_len = transfer_len;
692         void *data;
693         int cnt = 0;
694         __u32 info = 0;
695         unsigned int toggle = 0;
696
697         /* OHCI handles the DATA-toggles itself, we just use the USB-toggle bits for reseting */
698         if(usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe))) {
699                 toggle = TD_T_TOGGLE;
700         } else {
701                 toggle = TD_T_DATA0;
702                 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 1);
703         }
704         urb->td_cnt = 0;
705         if (data_len)
706                 data = buffer;
707         else
708                 data = 0;
709
710         switch (usb_pipetype (pipe)) {
711         case PIPE_BULK:
712                 info = usb_pipeout (pipe)?
713                         TD_CC | TD_DP_OUT : TD_CC | TD_DP_IN ;
714                 while(data_len > 4096) {
715                         td_fill (ohci, info | (cnt? TD_T_TOGGLE:toggle), data, 4096, dev, cnt, urb);
716                         data += 4096; data_len -= 4096; cnt++;
717                 }
718                 info = usb_pipeout (pipe)?
719                         TD_CC | TD_DP_OUT : TD_CC | TD_R | TD_DP_IN ;
720                 td_fill (ohci, info | (cnt? TD_T_TOGGLE:toggle), data, data_len, dev, cnt, urb);
721                 cnt++;
722
723                 if (!ohci->sleeping)
724                         writel (OHCI_BLF, &ohci->regs->cmdstatus); /* start bulk list */
725                 break;
726
727         case PIPE_CONTROL:
728                 info = TD_CC | TD_DP_SETUP | TD_T_DATA0;
729                 td_fill (ohci, info, setup, 8, dev, cnt++, urb);
730                 if (data_len > 0) {
731                         info = usb_pipeout (pipe)?
732                                 TD_CC | TD_R | TD_DP_OUT | TD_T_DATA1 : TD_CC | TD_R | TD_DP_IN | TD_T_DATA1;
733                         /* NOTE:  mishandles transfers >8K, some >4K */
734                         td_fill (ohci, info, data, data_len, dev, cnt++, urb);
735                 }
736                 info = usb_pipeout (pipe)?
737                         TD_CC | TD_DP_IN | TD_T_DATA1: TD_CC | TD_DP_OUT | TD_T_DATA1;
738                 td_fill (ohci, info, data, 0, dev, cnt++, urb);
739                 if (!ohci->sleeping)
740                         writel (OHCI_CLF, &ohci->regs->cmdstatus); /* start Control list */
741                 break;
742         }
743         if (urb->length != cnt)
744                 dbg("TD LENGTH %d != CNT %d", urb->length, cnt);
745 }
746
747 /*-------------------------------------------------------------------------*
748  * Done List handling functions
749  *-------------------------------------------------------------------------*/
750
751
752 /* calculate the transfer length and update the urb */
753
754 static void dl_transfer_length(td_t * td)
755 {
756         __u32 tdINFO, tdBE, tdCBP;
757         urb_priv_t *lurb_priv = &urb_priv;
758
759         tdINFO = ohci_cpu_to_le32 (td->hwINFO);
760         tdBE   = ohci_cpu_to_le32 (td->hwBE);
761         tdCBP  = ohci_cpu_to_le32 (td->hwCBP);
762
763
764         if (!(usb_pipetype (lurb_priv->pipe) == PIPE_CONTROL &&
765             ((td->index == 0) || (td->index == lurb_priv->length - 1)))) {
766                 if (tdBE != 0) {
767                         if (td->hwCBP == 0)
768                                 lurb_priv->actual_length += tdBE - td->data + 1;
769                         else
770                                 lurb_priv->actual_length += tdCBP - td->data;
771                 }
772         }
773 }
774
775 /*-------------------------------------------------------------------------*/
776
777 /* replies to the request have to be on a FIFO basis so
778  * we reverse the reversed done-list */
779
780 static td_t * dl_reverse_done_list (ohci_t *ohci)
781 {
782         __u32 td_list_hc;
783         td_t *td_rev = NULL;
784         td_t *td_list = NULL;
785         urb_priv_t *lurb_priv = NULL;
786
787         td_list_hc = ohci_cpu_to_le32 (ohci->hcca->done_head) & 0xfffffff0;
788         ohci->hcca->done_head = 0;
789
790         while (td_list_hc) {
791                 td_list = (td_t *)td_list_hc;
792
793                 if (TD_CC_GET (ohci_cpu_to_le32 (td_list->hwINFO))) {
794                         lurb_priv = &urb_priv;
795                         dbg(" USB-error/status: %x : %p",
796                                         TD_CC_GET (ohci_cpu_to_le32 (td_list->hwINFO)), td_list);
797                         if (td_list->ed->hwHeadP & ohci_cpu_to_le32 (0x1)) {
798                                 if (lurb_priv && ((td_list->index + 1) < lurb_priv->length)) {
799                                         td_list->ed->hwHeadP =
800                                                 (lurb_priv->td[lurb_priv->length - 1]->hwNextTD & ohci_cpu_to_le32 (0xfffffff0)) |
801                                                                         (td_list->ed->hwHeadP & ohci_cpu_to_le32 (0x2));
802                                         lurb_priv->td_cnt += lurb_priv->length - td_list->index - 1;
803                                 } else
804                                         td_list->ed->hwHeadP &= ohci_cpu_to_le32 (0xfffffff2);
805                         }
806 #ifdef CONFIG_MPC5200
807                         td_list->hwNextTD = 0;
808 #endif
809                 }
810
811                 td_list->next_dl_td = td_rev;
812                 td_rev = td_list;
813                 td_list_hc = ohci_cpu_to_le32 (td_list->hwNextTD) & 0xfffffff0;
814         }
815         return td_list;
816 }
817
818 /*-------------------------------------------------------------------------*/
819
820 /* td done list */
821 static int dl_done_list (ohci_t *ohci, td_t *td_list)
822 {
823         td_t *td_list_next = NULL;
824         ed_t *ed;
825         int cc = 0;
826         int stat = 0;
827         /* urb_t *urb; */
828         urb_priv_t *lurb_priv;
829         __u32 tdINFO, edHeadP, edTailP;
830
831         while (td_list) {
832                 td_list_next = td_list->next_dl_td;
833
834                 lurb_priv = &urb_priv;
835                 tdINFO = ohci_cpu_to_le32 (td_list->hwINFO);
836
837                 ed = td_list->ed;
838
839                 dl_transfer_length(td_list);
840
841                 /* error code of transfer */
842                 cc = TD_CC_GET (tdINFO);
843                 if (++(lurb_priv->td_cnt) == lurb_priv->length) {
844                         if ((ed->state & (ED_OPER | ED_UNLINK))
845                                         && (lurb_priv->state != URB_DEL)) {
846                                 dbg("ConditionCode %#x", cc);
847                                 stat = cc_to_error[cc];
848                                 urb_finished = 1;
849                         }
850                 }
851
852                 if (ed->state != ED_NEW) {
853                         edHeadP = ohci_cpu_to_le32 (ed->hwHeadP) & 0xfffffff0;
854                         edTailP = ohci_cpu_to_le32 (ed->hwTailP);
855
856                         /* unlink eds if they are not busy */
857                         if ((edHeadP == edTailP) && (ed->state == ED_OPER))
858                                 ep_unlink (ohci, ed);
859                 }
860
861                 td_list = td_list_next;
862         }
863         return stat;
864 }
865
866 /*-------------------------------------------------------------------------*
867  * Virtual Root Hub
868  *-------------------------------------------------------------------------*/
869
870 /* Device descriptor */
871 static __u8 root_hub_dev_des[] =
872 {
873         0x12,       /*  __u8  bLength; */
874         0x01,       /*  __u8  bDescriptorType; Device */
875         0x10,       /*  __u16 bcdUSB; v1.1 */
876         0x01,
877         0x09,       /*  __u8  bDeviceClass; HUB_CLASSCODE */
878         0x00,       /*  __u8  bDeviceSubClass; */
879         0x00,       /*  __u8  bDeviceProtocol; */
880         0x08,       /*  __u8  bMaxPacketSize0; 8 Bytes */
881         0x00,       /*  __u16 idVendor; */
882         0x00,
883         0x00,       /*  __u16 idProduct; */
884         0x00,
885         0x00,       /*  __u16 bcdDevice; */
886         0x00,
887         0x00,       /*  __u8  iManufacturer; */
888         0x01,       /*  __u8  iProduct; */
889         0x00,       /*  __u8  iSerialNumber; */
890         0x01        /*  __u8  bNumConfigurations; */
891 };
892
893
894 /* Configuration descriptor */
895 static __u8 root_hub_config_des[] =
896 {
897         0x09,       /*  __u8  bLength; */
898         0x02,       /*  __u8  bDescriptorType; Configuration */
899         0x19,       /*  __u16 wTotalLength; */
900         0x00,
901         0x01,       /*  __u8  bNumInterfaces; */
902         0x01,       /*  __u8  bConfigurationValue; */
903         0x00,       /*  __u8  iConfiguration; */
904         0x40,       /*  __u8  bmAttributes;
905                  Bit 7: Bus-powered, 6: Self-powered, 5 Remote-wakwup, 4..0: resvd */
906         0x00,       /*  __u8  MaxPower; */
907
908         /* interface */
909         0x09,       /*  __u8  if_bLength; */
910         0x04,       /*  __u8  if_bDescriptorType; Interface */
911         0x00,       /*  __u8  if_bInterfaceNumber; */
912         0x00,       /*  __u8  if_bAlternateSetting; */
913         0x01,       /*  __u8  if_bNumEndpoints; */
914         0x09,       /*  __u8  if_bInterfaceClass; HUB_CLASSCODE */
915         0x00,       /*  __u8  if_bInterfaceSubClass; */
916         0x00,       /*  __u8  if_bInterfaceProtocol; */
917         0x00,       /*  __u8  if_iInterface; */
918
919         /* endpoint */
920         0x07,       /*  __u8  ep_bLength; */
921         0x05,       /*  __u8  ep_bDescriptorType; Endpoint */
922         0x81,       /*  __u8  ep_bEndpointAddress; IN Endpoint 1 */
923         0x03,       /*  __u8  ep_bmAttributes; Interrupt */
924         0x02,       /*  __u16 ep_wMaxPacketSize; ((MAX_ROOT_PORTS + 1) / 8 */
925         0x00,
926         0xff        /*  __u8  ep_bInterval; 255 ms */
927 };
928
929 static unsigned char root_hub_str_index0[] =
930 {
931         0x04,                   /*  __u8  bLength; */
932         0x03,                   /*  __u8  bDescriptorType; String-descriptor */
933         0x09,                   /*  __u8  lang ID */
934         0x04,                   /*  __u8  lang ID */
935 };
936
937 static unsigned char root_hub_str_index1[] =
938 {
939         28,                     /*  __u8  bLength; */
940         0x03,                   /*  __u8  bDescriptorType; String-descriptor */
941         'O',                    /*  __u8  Unicode */
942         0,                              /*  __u8  Unicode */
943         'H',                    /*  __u8  Unicode */
944         0,                              /*  __u8  Unicode */
945         'C',                    /*  __u8  Unicode */
946         0,                              /*  __u8  Unicode */
947         'I',                    /*  __u8  Unicode */
948         0,                              /*  __u8  Unicode */
949         ' ',                    /*  __u8  Unicode */
950         0,                              /*  __u8  Unicode */
951         'R',                    /*  __u8  Unicode */
952         0,                              /*  __u8  Unicode */
953         'o',                    /*  __u8  Unicode */
954         0,                              /*  __u8  Unicode */
955         'o',                    /*  __u8  Unicode */
956         0,                              /*  __u8  Unicode */
957         't',                    /*  __u8  Unicode */
958         0,                              /*  __u8  Unicode */
959         ' ',                    /*  __u8  Unicode */
960         0,                              /*  __u8  Unicode */
961         'H',                    /*  __u8  Unicode */
962         0,                              /*  __u8  Unicode */
963         'u',                    /*  __u8  Unicode */
964         0,                              /*  __u8  Unicode */
965         'b',                    /*  __u8  Unicode */
966         0,                              /*  __u8  Unicode */
967 };
968
969 /* Hub class-specific descriptor is constructed dynamically */
970
971
972 /*-------------------------------------------------------------------------*/
973
974 #define OK(x)                   len = (x); break
975 #ifdef DEBUG
976 #define WR_RH_STAT(x)           {info("WR:status %#8x", (x));writel((x), &gohci.regs->roothub.status);}
977 #define WR_RH_PORTSTAT(x)       {info("WR:portstatus[%d] %#8x", wIndex-1, (x));writel((x), &gohci.regs->roothub.portstatus[wIndex-1]);}
978 #else
979 #define WR_RH_STAT(x)           writel((x), &gohci.regs->roothub.status)
980 #define WR_RH_PORTSTAT(x)       writel((x), &gohci.regs->roothub.portstatus[wIndex-1])
981 #endif
982 #define RD_RH_STAT              roothub_status(&gohci)
983 #define RD_RH_PORTSTAT          roothub_portstatus(&gohci,wIndex-1)
984
985 /* request to virtual root hub */
986
987 int rh_check_port_status(ohci_t *controller)
988 {
989         __u32 temp, ndp, i;
990         int res;
991
992         res = -1;
993         temp = roothub_a (controller);
994         ndp = (temp & RH_A_NDP);
995         for (i = 0; i < ndp; i++) {
996                 temp = roothub_portstatus (controller, i);
997                 /* check for a device disconnect */
998                 if (((temp & (RH_PS_PESC | RH_PS_CSC)) ==
999                         (RH_PS_PESC | RH_PS_CSC)) &&
1000                         ((temp & RH_PS_CCS) == 0)) {
1001                         res = i;
1002                         break;
1003                 }
1004         }
1005         return res;
1006 }
1007
1008 static int ohci_submit_rh_msg(struct usb_device *dev, unsigned long pipe,
1009                 void *buffer, int transfer_len, struct devrequest *cmd)
1010 {
1011         void * data = buffer;
1012         int leni = transfer_len;
1013         int len = 0;
1014         int stat = 0;
1015         __u32 datab[4];
1016         __u8 *data_buf = (__u8 *)datab;
1017         __u16 bmRType_bReq;
1018         __u16 wValue;
1019         __u16 wIndex;
1020         __u16 wLength;
1021
1022 #ifdef DEBUG
1023 urb_priv.actual_length = 0;
1024 pkt_print(dev, pipe, buffer, transfer_len, cmd, "SUB(rh)", usb_pipein(pipe));
1025 #endif
1026         if ((pipe & PIPE_INTERRUPT) == PIPE_INTERRUPT) {
1027                 info("Root-Hub submit IRQ: NOT implemented");
1028                 return 0;
1029         }
1030
1031         bmRType_bReq  = cmd->requesttype | (cmd->request << 8);
1032         wValue        = m16_swap (cmd->value);
1033         wIndex        = m16_swap (cmd->index);
1034         wLength       = m16_swap (cmd->length);
1035
1036         info("Root-Hub: adr: %2x cmd(%1x): %08x %04x %04x %04x",
1037                 dev->devnum, 8, bmRType_bReq, wValue, wIndex, wLength);
1038
1039         switch (bmRType_bReq) {
1040         /* Request Destination:
1041            without flags: Device,
1042            RH_INTERFACE: interface,
1043            RH_ENDPOINT: endpoint,
1044            RH_CLASS means HUB here,
1045            RH_OTHER | RH_CLASS  almost ever means HUB_PORT here
1046         */
1047
1048         case RH_GET_STATUS:
1049                         *(__u16 *) data_buf = m16_swap (1); OK (2);
1050         case RH_GET_STATUS | RH_INTERFACE:
1051                         *(__u16 *) data_buf = m16_swap (0); OK (2);
1052         case RH_GET_STATUS | RH_ENDPOINT:
1053                         *(__u16 *) data_buf = m16_swap (0); OK (2);
1054         case RH_GET_STATUS | RH_CLASS:
1055                         *(__u32 *) data_buf = m32_swap (
1056                                 RD_RH_STAT & ~(RH_HS_CRWE | RH_HS_DRWE));
1057                         OK (4);
1058         case RH_GET_STATUS | RH_OTHER | RH_CLASS:
1059                         *(__u32 *) data_buf = m32_swap (RD_RH_PORTSTAT); OK (4);
1060
1061         case RH_CLEAR_FEATURE | RH_ENDPOINT:
1062                 switch (wValue) {
1063                         case (RH_ENDPOINT_STALL): OK (0);
1064                 }
1065                 break;
1066
1067         case RH_CLEAR_FEATURE | RH_CLASS:
1068                 switch (wValue) {
1069                         case RH_C_HUB_LOCAL_POWER:
1070                                 OK(0);
1071                         case (RH_C_HUB_OVER_CURRENT):
1072                                         WR_RH_STAT(RH_HS_OCIC); OK (0);
1073                 }
1074                 break;
1075
1076         case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
1077                 switch (wValue) {
1078                         case (RH_PORT_ENABLE):
1079                                         WR_RH_PORTSTAT (RH_PS_CCS ); OK (0);
1080                         case (RH_PORT_SUSPEND):
1081                                         WR_RH_PORTSTAT (RH_PS_POCI); OK (0);
1082                         case (RH_PORT_POWER):
1083                                         WR_RH_PORTSTAT (RH_PS_LSDA); OK (0);
1084                         case (RH_C_PORT_CONNECTION):
1085                                         WR_RH_PORTSTAT (RH_PS_CSC ); OK (0);
1086                         case (RH_C_PORT_ENABLE):
1087                                         WR_RH_PORTSTAT (RH_PS_PESC); OK (0);
1088                         case (RH_C_PORT_SUSPEND):
1089                                         WR_RH_PORTSTAT (RH_PS_PSSC); OK (0);
1090                         case (RH_C_PORT_OVER_CURRENT):
1091                                         WR_RH_PORTSTAT (RH_PS_OCIC); OK (0);
1092                         case (RH_C_PORT_RESET):
1093                                         WR_RH_PORTSTAT (RH_PS_PRSC); OK (0);
1094                 }
1095                 break;
1096
1097         case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
1098                 switch (wValue) {
1099                         case (RH_PORT_SUSPEND):
1100                                         WR_RH_PORTSTAT (RH_PS_PSS ); OK (0);
1101                         case (RH_PORT_RESET): /* BUG IN HUP CODE *********/
1102                                         if (RD_RH_PORTSTAT & RH_PS_CCS)
1103                                             WR_RH_PORTSTAT (RH_PS_PRS);
1104                                         OK (0);
1105                         case (RH_PORT_POWER):
1106                                         WR_RH_PORTSTAT (RH_PS_PPS ); OK (0);
1107                         case (RH_PORT_ENABLE): /* BUG IN HUP CODE *********/
1108                                         if (RD_RH_PORTSTAT & RH_PS_CCS)
1109                                             WR_RH_PORTSTAT (RH_PS_PES );
1110                                         OK (0);
1111                 }
1112                 break;
1113
1114         case RH_SET_ADDRESS: gohci.rh.devnum = wValue; OK(0);
1115
1116         case RH_GET_DESCRIPTOR:
1117                 switch ((wValue & 0xff00) >> 8) {
1118                         case (0x01): /* device descriptor */
1119                                 len = min_t(unsigned int,
1120                                           leni,
1121                                           min_t(unsigned int,
1122                                               sizeof (root_hub_dev_des),
1123                                               wLength));
1124                                 data_buf = root_hub_dev_des; OK(len);
1125                         case (0x02): /* configuration descriptor */
1126                                 len = min_t(unsigned int,
1127                                           leni,
1128                                           min_t(unsigned int,
1129                                               sizeof (root_hub_config_des),
1130                                               wLength));
1131                                 data_buf = root_hub_config_des; OK(len);
1132                         case (0x03): /* string descriptors */
1133                                 if(wValue==0x0300) {
1134                                         len = min_t(unsigned int,
1135                                                   leni,
1136                                                   min_t(unsigned int,
1137                                                       sizeof (root_hub_str_index0),
1138                                                       wLength));
1139                                         data_buf = root_hub_str_index0;
1140                                         OK(len);
1141                                 }
1142                                 if(wValue==0x0301) {
1143                                         len = min_t(unsigned int,
1144                                                   leni,
1145                                                   min_t(unsigned int,
1146                                                       sizeof (root_hub_str_index1),
1147                                                       wLength));
1148                                         data_buf = root_hub_str_index1;
1149                                         OK(len);
1150                         }
1151                         default:
1152                                 stat = USB_ST_STALLED;
1153                 }
1154                 break;
1155
1156         case RH_GET_DESCRIPTOR | RH_CLASS:
1157             {
1158                     __u32 temp = roothub_a (&gohci);
1159
1160                     data_buf [0] = 9;           /* min length; */
1161                     data_buf [1] = 0x29;
1162                     data_buf [2] = temp & RH_A_NDP;
1163                     data_buf [3] = 0;
1164                     if (temp & RH_A_PSM)        /* per-port power switching? */
1165                         data_buf [3] |= 0x1;
1166                     if (temp & RH_A_NOCP)       /* no overcurrent reporting? */
1167                         data_buf [3] |= 0x10;
1168                     else if (temp & RH_A_OCPM)  /* per-port overcurrent reporting? */
1169                         data_buf [3] |= 0x8;
1170
1171                     /* corresponds to data_buf[4-7] */
1172                     datab [1] = 0;
1173                     data_buf [5] = (temp & RH_A_POTPGT) >> 24;
1174                     temp = roothub_b (&gohci);
1175                     data_buf [7] = temp & RH_B_DR;
1176                     if (data_buf [2] < 7) {
1177                         data_buf [8] = 0xff;
1178                     } else {
1179                         data_buf [0] += 2;
1180                         data_buf [8] = (temp & RH_B_DR) >> 8;
1181                         data_buf [10] = data_buf [9] = 0xff;
1182                     }
1183
1184                     len = min_t(unsigned int, leni,
1185                               min_t(unsigned int, data_buf [0], wLength));
1186                     OK (len);
1187                 }
1188
1189         case RH_GET_CONFIGURATION:      *(__u8 *) data_buf = 0x01; OK (1);
1190
1191         case RH_SET_CONFIGURATION:      WR_RH_STAT (0x10000); OK (0);
1192
1193         default:
1194                 dbg ("unsupported root hub command");
1195                 stat = USB_ST_STALLED;
1196         }
1197
1198 #ifdef  DEBUG
1199         ohci_dump_roothub (&gohci, 1);
1200 #endif
1201
1202         len = min_t(int, len, leni);
1203         if (data != data_buf)
1204             memcpy (data, data_buf, len);
1205         dev->act_len = len;
1206         dev->status = stat;
1207
1208 #ifdef DEBUG
1209         if (transfer_len)
1210                 urb_priv.actual_length = transfer_len;
1211         pkt_print(dev, pipe, buffer, transfer_len, cmd, "RET(rh)", 0/*usb_pipein(pipe)*/);
1212 #endif
1213
1214         return stat;
1215 }
1216
1217 /*-------------------------------------------------------------------------*/
1218
1219 /* common code for handling submit messages - used for all but root hub */
1220 /* accesses. */
1221 int submit_common_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1222                 int transfer_len, struct devrequest *setup, int interval)
1223 {
1224         int stat = 0;
1225         int maxsize = usb_maxpacket(dev, pipe);
1226         int timeout;
1227
1228         /* device pulled? Shortcut the action. */
1229         if (devgone == dev) {
1230                 dev->status = USB_ST_CRC_ERR;
1231                 return 0;
1232         }
1233
1234 #ifdef DEBUG
1235         urb_priv.actual_length = 0;
1236         pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB", usb_pipein(pipe));
1237 #endif
1238         if (!maxsize) {
1239                 err("submit_common_message: pipesize for pipe %lx is zero",
1240                         pipe);
1241                 return -1;
1242         }
1243
1244         if (sohci_submit_job(dev, pipe, buffer, transfer_len, setup, interval) < 0) {
1245                 err("sohci_submit_job failed");
1246                 return -1;
1247         }
1248
1249         /* allow more time for a BULK device to react - some are slow */
1250 #define BULK_TO  5000   /* timeout in milliseconds */
1251         if (usb_pipetype (pipe) == PIPE_BULK)
1252                 timeout = BULK_TO;
1253         else
1254                 timeout = 100;
1255
1256         /* wait for it to complete */
1257         for (;;) {
1258                 /* check whether the controller is done */
1259                 stat = hc_interrupt();
1260                 if (stat < 0) {
1261                         stat = USB_ST_CRC_ERR;
1262                         break;
1263                 }
1264
1265                 /* NOTE: since we are not interrupt driven in U-Boot and always
1266                  * handle only one URB at a time, we cannot assume the
1267                  * transaction finished on the first successful return from
1268                  * hc_interrupt().. unless the flag for current URB is set,
1269                  * meaning that all TD's to/from device got actually
1270                  * transferred and processed. If the current URB is not
1271                  * finished we need to re-iterate this loop so as
1272                  * hc_interrupt() gets called again as there needs to be some
1273                  * more TD's to process still */
1274                 if ((stat >= 0) && (stat != 0xff) && (urb_finished)) {
1275                         /* 0xff is returned for an SF-interrupt */
1276                         break;
1277                 }
1278
1279                 if (--timeout) {
1280                         wait_ms(1);
1281                         if (!urb_finished)
1282                                 dbg("\%");
1283
1284                 } else {
1285                         err("CTL:TIMEOUT ");
1286                         dbg("submit_common_msg: TO status %x\n", stat);
1287                         stat = USB_ST_CRC_ERR;
1288                         urb_finished = 1;
1289                         break;
1290                 }
1291         }
1292 #if 0
1293         /* we got an Root Hub Status Change interrupt */
1294         if (got_rhsc) {
1295 #ifdef DEBUG
1296                 ohci_dump_roothub (&gohci, 1);
1297 #endif
1298                 got_rhsc = 0;
1299                 /* abuse timeout */
1300                 timeout = rh_check_port_status(&gohci);
1301                 if (timeout >= 0) {
1302 #if 0 /* this does nothing useful, but leave it here in case that changes */
1303                         /* the called routine adds 1 to the passed value */
1304                         usb_hub_port_connect_change(gohci.rh.dev, timeout - 1);
1305 #endif
1306                         /*
1307                          * XXX
1308                          * This is potentially dangerous because it assumes
1309                          * that only one device is ever plugged in!
1310                          */
1311                         devgone = dev;
1312                 }
1313         }
1314 #endif
1315
1316         dev->status = stat;
1317         dev->act_len = transfer_len;
1318
1319 #ifdef DEBUG
1320         pkt_print(dev, pipe, buffer, transfer_len, setup, "RET(ctlr)", usb_pipein(pipe));
1321 #endif
1322
1323         /* free TDs in urb_priv */
1324         urb_free_priv (&urb_priv);
1325         return 0;
1326 }
1327
1328 /* submit routines called from usb.c */
1329 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1330                 int transfer_len)
1331 {
1332         info("submit_bulk_msg");
1333         return submit_common_msg(dev, pipe, buffer, transfer_len, NULL, 0);
1334 }
1335
1336 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1337                 int transfer_len, struct devrequest *setup)
1338 {
1339         int maxsize = usb_maxpacket(dev, pipe);
1340
1341         info("submit_control_msg");
1342 #ifdef DEBUG
1343         urb_priv.actual_length = 0;
1344         pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB", usb_pipein(pipe));
1345 #endif
1346         if (!maxsize) {
1347                 err("submit_control_message: pipesize for pipe %lx is zero",
1348                         pipe);
1349                 return -1;
1350         }
1351         if (((pipe >> 8) & 0x7f) == gohci.rh.devnum) {
1352                 gohci.rh.dev = dev;
1353                 /* root hub - redirect */
1354                 return ohci_submit_rh_msg(dev, pipe, buffer, transfer_len,
1355                         setup);
1356         }
1357
1358         return submit_common_msg(dev, pipe, buffer, transfer_len, setup, 0);
1359 }
1360
1361 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1362                 int transfer_len, int interval)
1363 {
1364         info("submit_int_msg");
1365         return -1;
1366 }
1367
1368 /*-------------------------------------------------------------------------*
1369  * HC functions
1370  *-------------------------------------------------------------------------*/
1371
1372 /* reset the HC and BUS */
1373
1374 static int hc_reset (ohci_t *ohci)
1375 {
1376         int timeout = 30;
1377         int smm_timeout = 50; /* 0,5 sec */
1378
1379         if (readl (&ohci->regs->control) & OHCI_CTRL_IR) { /* SMM owns the HC */
1380                 writel (OHCI_OCR, &ohci->regs->cmdstatus); /* request ownership */
1381                 info("USB HC TakeOver from SMM");
1382                 while (readl (&ohci->regs->control) & OHCI_CTRL_IR) {
1383                         wait_ms (10);
1384                         if (--smm_timeout == 0) {
1385                                 err("USB HC TakeOver failed!");
1386                                 return -1;
1387                         }
1388                 }
1389         }
1390
1391         /* Disable HC interrupts */
1392         writel (OHCI_INTR_MIE, &ohci->regs->intrdisable);
1393
1394         dbg("USB HC reset_hc usb-%s: ctrl = 0x%X ;",
1395                 ohci->slot_name,
1396                 readl (&ohci->regs->control));
1397
1398         /* Reset USB (needed by some controllers) */
1399         ohci->hc_control = 0;
1400         writel (ohci->hc_control, &ohci->regs->control);
1401
1402         /* HC Reset requires max 10 us delay */
1403         writel (OHCI_HCR,  &ohci->regs->cmdstatus);
1404         while ((readl (&ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
1405                 if (--timeout == 0) {
1406                         err("USB HC reset timed out!");
1407                         return -1;
1408                 }
1409                 udelay (1);
1410         }
1411         return 0;
1412 }
1413
1414 /*-------------------------------------------------------------------------*/
1415
1416 /* Start an OHCI controller, set the BUS operational
1417  * enable interrupts
1418  * connect the virtual root hub */
1419
1420 static int hc_start (ohci_t * ohci)
1421 {
1422         __u32 mask;
1423         unsigned int fminterval;
1424
1425         ohci->disabled = 1;
1426
1427         /* Tell the controller where the control and bulk lists are
1428          * The lists are empty now. */
1429
1430         writel (0, &ohci->regs->ed_controlhead);
1431         writel (0, &ohci->regs->ed_bulkhead);
1432
1433         writel ((__u32)ohci->hcca, &ohci->regs->hcca); /* a reset clears this */
1434
1435         fminterval = 0x2edf;
1436         writel ((fminterval * 9) / 10, &ohci->regs->periodicstart);
1437         fminterval |= ((((fminterval - 210) * 6) / 7) << 16);
1438         writel (fminterval, &ohci->regs->fminterval);
1439         writel (0x628, &ohci->regs->lsthresh);
1440
1441         /* start controller operations */
1442         ohci->hc_control = OHCI_CONTROL_INIT | OHCI_USB_OPER;
1443         ohci->disabled = 0;
1444         writel (ohci->hc_control, &ohci->regs->control);
1445
1446         /* disable all interrupts */
1447         mask = (OHCI_INTR_SO | OHCI_INTR_WDH | OHCI_INTR_SF | OHCI_INTR_RD |
1448                         OHCI_INTR_UE | OHCI_INTR_FNO | OHCI_INTR_RHSC |
1449                         OHCI_INTR_OC | OHCI_INTR_MIE);
1450         writel (mask, &ohci->regs->intrdisable);
1451         /* clear all interrupts */
1452         mask &= ~OHCI_INTR_MIE;
1453         writel (mask, &ohci->regs->intrstatus);
1454         /* Choose the interrupts we care about now  - but w/o MIE */
1455         mask = OHCI_INTR_RHSC | OHCI_INTR_UE | OHCI_INTR_WDH | OHCI_INTR_SO;
1456         writel (mask, &ohci->regs->intrenable);
1457
1458 #ifdef  OHCI_USE_NPS
1459         /* required for AMD-756 and some Mac platforms */
1460         writel ((roothub_a (ohci) | RH_A_NPS) & ~RH_A_PSM,
1461                 &ohci->regs->roothub.a);
1462         writel (RH_HS_LPSC, &ohci->regs->roothub.status);
1463 #endif  /* OHCI_USE_NPS */
1464
1465 #define mdelay(n) ({unsigned long msec=(n); while (msec--) udelay(1000);})
1466         /* POTPGT delay is bits 24-31, in 2 ms units. */
1467         mdelay ((roothub_a (ohci) >> 23) & 0x1fe);
1468
1469         /* connect the virtual root hub */
1470         ohci->rh.devnum = 0;
1471
1472         return 0;
1473 }
1474
1475 /*-------------------------------------------------------------------------*/
1476
1477 /* an interrupt happens */
1478
1479 static int
1480 hc_interrupt (void)
1481 {
1482         ohci_t *ohci = &gohci;
1483         struct ohci_regs *regs = ohci->regs;
1484         int ints;
1485         int stat = -1;
1486
1487         if ((ohci->hcca->done_head != 0) &&
1488              !(ohci_cpu_to_le32(ohci->hcca->done_head) & 0x01)) {
1489
1490                 ints =  OHCI_INTR_WDH;
1491
1492         } else if ((ints = readl (&regs->intrstatus)) == ~(u32)0) {
1493                 ohci->disabled++;
1494                 err ("%s device removed!", ohci->slot_name);
1495                 return -1;
1496
1497         } else if ((ints &= readl (&regs->intrenable)) == 0) {
1498                 dbg("hc_interrupt: returning..\n");
1499                 return 0xff;
1500         }
1501
1502         /* dbg("Interrupt: %x frame: %x", ints, le16_to_cpu (ohci->hcca->frame_no)); */
1503
1504         if (ints & OHCI_INTR_RHSC) {
1505                 got_rhsc = 1;
1506                 stat = 0xff;
1507         }
1508
1509         if (ints & OHCI_INTR_UE) {
1510                 ohci->disabled++;
1511                 err ("OHCI Unrecoverable Error, controller usb-%s disabled",
1512                         ohci->slot_name);
1513                 /* e.g. due to PCI Master/Target Abort */
1514
1515 #ifdef  DEBUG
1516                 ohci_dump (ohci, 1);
1517 #endif
1518                 /* FIXME: be optimistic, hope that bug won't repeat often. */
1519                 /* Make some non-interrupt context restart the controller. */
1520                 /* Count and limit the retries though; either hardware or */
1521                 /* software errors can go forever... */
1522                 hc_reset (ohci);
1523                 return -1;
1524         }
1525
1526         if (ints & OHCI_INTR_WDH) {
1527                 writel (OHCI_INTR_WDH, &regs->intrdisable);
1528                 stat = dl_done_list (&gohci, dl_reverse_done_list (&gohci));
1529                 writel (OHCI_INTR_WDH, &regs->intrenable);
1530         }
1531
1532         if (ints & OHCI_INTR_SO) {
1533                 dbg("USB Schedule overrun\n");
1534                 writel (OHCI_INTR_SO, &regs->intrenable);
1535                 stat = -1;
1536         }
1537
1538         /* FIXME:  this assumes SOF (1/ms) interrupts don't get lost... */
1539         if (ints & OHCI_INTR_SF) {
1540                 unsigned int frame = ohci_cpu_to_le16 (ohci->hcca->frame_no) & 1;
1541                 wait_ms(1);
1542                 writel (OHCI_INTR_SF, &regs->intrdisable);
1543                 if (ohci->ed_rm_list[frame] != NULL)
1544                         writel (OHCI_INTR_SF, &regs->intrenable);
1545                 stat = 0xff;
1546         }
1547
1548         writel (ints, &regs->intrstatus);
1549         return stat;
1550 }
1551
1552 /*-------------------------------------------------------------------------*/
1553
1554 /*-------------------------------------------------------------------------*/
1555
1556 /* De-allocate all resources.. */
1557
1558 static void hc_release_ohci (ohci_t *ohci)
1559 {
1560         dbg ("USB HC release ohci usb-%s", ohci->slot_name);
1561
1562         if (!ohci->disabled)
1563                 hc_reset (ohci);
1564 }
1565
1566 /*-------------------------------------------------------------------------*/
1567
1568 /*
1569  * low level initalisation routine, called from usb.c
1570  */
1571 static char ohci_inited = 0;
1572
1573 int usb_lowlevel_init(void)
1574 {
1575
1576         /* Set the USB Clock                                                 */
1577         *(vu_long *)MPC5XXX_CDM_48_FDC = CONFIG_USB_CLOCK;
1578
1579         /* remove all USB bits first before ORing in ours */
1580         *(vu_long *)MPC5XXX_GPS_PORT_CONFIG &= ~0x00807000;
1581
1582         /* Activate USB port                                                 */
1583         *(vu_long *)MPC5XXX_GPS_PORT_CONFIG |= CONFIG_USB_CONFIG;
1584
1585         memset (&gohci, 0, sizeof (ohci_t));
1586         memset (&urb_priv, 0, sizeof (urb_priv_t));
1587
1588         /* align the storage */
1589         if ((__u32)&ghcca[0] & 0xff) {
1590                 err("HCCA not aligned!!");
1591                 return -1;
1592         }
1593         phcca = &ghcca[0];
1594         info("aligned ghcca %p", phcca);
1595         memset(&ohci_dev, 0, sizeof(struct ohci_device));
1596         if ((__u32)&ohci_dev.ed[0] & 0x7) {
1597                 err("EDs not aligned!!");
1598                 return -1;
1599         }
1600         memset(gtd, 0, sizeof(td_t) * (NUM_TD + 1));
1601         if ((__u32)gtd & 0x7) {
1602                 err("TDs not aligned!!");
1603                 return -1;
1604         }
1605         ptd = gtd;
1606         gohci.hcca = phcca;
1607         memset (phcca, 0, sizeof (struct ohci_hcca));
1608
1609         gohci.disabled = 1;
1610         gohci.sleeping = 0;
1611         gohci.irq = -1;
1612         gohci.regs = (struct ohci_regs *)MPC5XXX_USB;
1613
1614         gohci.flags = 0;
1615         gohci.slot_name = "mpc5200";
1616
1617         if (hc_reset (&gohci) < 0) {
1618                 hc_release_ohci (&gohci);
1619                 return -1;
1620         }
1621
1622         if (hc_start (&gohci) < 0) {
1623                 err ("can't start usb-%s", gohci.slot_name);
1624                 hc_release_ohci (&gohci);
1625                 return -1;
1626         }
1627
1628 #ifdef  DEBUG
1629         ohci_dump (&gohci, 1);
1630 #endif
1631         ohci_inited = 1;
1632         urb_finished = 1;
1633
1634         return 0;
1635 }
1636
1637 int usb_lowlevel_stop(void)
1638 {
1639         /* this gets called really early - before the controller has */
1640         /* even been initialized! */
1641         if (!ohci_inited)
1642                 return 0;
1643         /* TODO release any interrupts, etc. */
1644         /* call hc_release_ohci() here ? */
1645         hc_reset (&gohci);
1646         return 0;
1647 }
1648
1649 #endif /* CONFIG_USB_OHCI */