2 * URB OHCI HCD (Host Controller Driver) for USB on the S3C2400.
5 * Gary Jennejohn, DENX Software Engineering <garyj@denx.de>
7 * Note: Much of this code has been derived from Linux 2.4
8 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
9 * (C) Copyright 2000-2002 David Brownell
11 * See file CREDITS for list of people who contributed to this
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License as
16 * published by the Free Software Foundation; either version 2 of
17 * the License, or (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
32 * 1 - this driver is intended for use with USB Mass Storage Devices
33 * (BBB) ONLY. There is NO support for Interrupt or Isochronous pipes!
37 /* #include <pci.h> no PCI on the S3C24X0 */
39 #ifdef CONFIG_USB_OHCI
41 #if defined(CONFIG_S3C2400)
43 #elif defined(CONFIG_S3C2410)
51 #define OHCI_USE_NPS /* force NoPowerSwitching mode */
52 #undef OHCI_VERBOSE_DEBUG /* not always helpful */
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
59 #define readl(a) (*((volatile u32 *)(a)))
60 #define writel(a, b) (*((volatile u32 *)(b)) = ((volatile u32)a))
62 #define min_t(type,x,y) ({ type __x = (x); type __y = (y); __x < __y ? __x: __y; })
66 #define dbg(format, arg...) printf("DEBUG: " format "\n", ## arg)
68 #define dbg(format, arg...) do {} while(0)
70 #define err(format, arg...) printf("ERROR: " format "\n", ## arg)
73 #define info(format, arg...) printf("INFO: " format "\n", ## arg)
75 #define info(format, arg...) do {} while(0)
78 #define m16_swap(x) swap_16(x)
79 #define m32_swap(x) swap_32(x)
83 /* this must be aligned to a 256 byte boundary */
84 struct ohci_hcca ghcca[1];
85 /* a pointer to the aligned storage */
86 struct ohci_hcca *phcca;
87 /* this allocates EDs for all possible endpoints */
88 struct ohci_device ohci_dev;
93 /* device which was disconnected */
94 struct usb_device *devgone;
95 /* flag guarding URB transation */
98 /*-------------------------------------------------------------------------*/
100 /* AMD-756 (D2 rev) reports corrupt register contents in some cases.
101 * The erratum (#4) description is incorrect. AMD's workaround waits
102 * till some bits (mostly reserved) are clear; ok for all revs.
104 #define OHCI_QUIRK_AMD756 0xabcd
105 #define read_roothub(hc, register, mask) ({ \
106 u32 temp = readl (&hc->regs->roothub.register); \
107 if (hc->flags & OHCI_QUIRK_AMD756) \
108 while (temp & mask) \
109 temp = readl (&hc->regs->roothub.register); \
112 static u32 roothub_a (struct ohci *hc)
113 { return read_roothub (hc, a, 0xfc0fe000); }
114 static inline u32 roothub_b (struct ohci *hc)
115 { return readl (&hc->regs->roothub.b); }
116 static inline u32 roothub_status (struct ohci *hc)
117 { return readl (&hc->regs->roothub.status); }
118 static u32 roothub_portstatus (struct ohci *hc, int i)
119 { return read_roothub (hc, portstatus [i], 0xffe0fce0); }
122 /* forward declaration */
123 static int hc_interrupt (void);
125 td_submit_job (struct usb_device * dev, unsigned long pipe, void * buffer,
126 int transfer_len, struct devrequest * setup, urb_priv_t * urb, int interval);
128 /*-------------------------------------------------------------------------*
129 * URB support functions
130 *-------------------------------------------------------------------------*/
132 /* free HCD-private data associated with this URB */
134 static void urb_free_priv (urb_priv_t * urb)
140 last = urb->length - 1;
142 for (i = 0; i <= last; i++) {
152 /*-------------------------------------------------------------------------*/
155 static int sohci_get_current_frame_number (struct usb_device * dev);
157 /* debug| print the main components of an URB
158 * small: 0) header + data packets 1) just header */
160 static void pkt_print (struct usb_device * dev, unsigned long pipe, void * buffer,
161 int transfer_len, struct devrequest * setup, char * str, int small)
163 urb_priv_t * purb = &urb_priv;
165 dbg("%s URB:[%4x] dev:%2d,ep:%2d-%c,type:%s,len:%d/%d stat:%#lx",
167 sohci_get_current_frame_number (dev),
168 usb_pipedevice (pipe),
169 usb_pipeendpoint (pipe),
170 usb_pipeout (pipe)? 'O': 'I',
171 usb_pipetype (pipe) < 2? (usb_pipeint (pipe)? "INTR": "ISOC"):
172 (usb_pipecontrol (pipe)? "CTRL": "BULK"),
174 transfer_len, dev->status);
175 #ifdef OHCI_VERBOSE_DEBUG
179 if (usb_pipecontrol (pipe)) {
180 printf (__FILE__ ": cmd(8):");
181 for (i = 0; i < 8 ; i++)
182 printf (" %02x", ((__u8 *) setup) [i]);
185 if (transfer_len > 0 && buffer) {
186 printf (__FILE__ ": data(%d/%d):",
189 len = usb_pipeout (pipe)?
190 transfer_len: purb->actual_length;
191 for (i = 0; i < 16 && i < len; i++)
192 printf (" %02x", ((__u8 *) buffer) [i]);
193 printf ("%s\n", i < len? "...": "");
199 /* just for debugging; prints non-empty branches of the int ed tree inclusive iso eds*/
200 void ep_print_int_eds (ohci_t *ohci, char * str) {
203 for (i= 0; i < 32; i++) {
205 ed_p = &(ohci->hcca->int_table [i]);
208 printf (__FILE__ ": %s branch int %2d(%2x):", str, i, i);
209 while (*ed_p != 0 && j--) {
210 ed_t *ed = (ed_t *)m32_swap(ed_p);
211 printf (" ed: %4x;", ed->hwINFO);
212 ed_p = &ed->hwNextED;
218 static void ohci_dump_intr_mask (char *label, __u32 mask)
220 dbg ("%s: 0x%08x%s%s%s%s%s%s%s%s%s",
223 (mask & OHCI_INTR_MIE) ? " MIE" : "",
224 (mask & OHCI_INTR_OC) ? " OC" : "",
225 (mask & OHCI_INTR_RHSC) ? " RHSC" : "",
226 (mask & OHCI_INTR_FNO) ? " FNO" : "",
227 (mask & OHCI_INTR_UE) ? " UE" : "",
228 (mask & OHCI_INTR_RD) ? " RD" : "",
229 (mask & OHCI_INTR_SF) ? " SF" : "",
230 (mask & OHCI_INTR_WDH) ? " WDH" : "",
231 (mask & OHCI_INTR_SO) ? " SO" : ""
235 static void maybe_print_eds (char *label, __u32 value)
237 ed_t *edp = (ed_t *)value;
240 dbg ("%s %08x", label, value);
241 dbg ("%08x", edp->hwINFO);
242 dbg ("%08x", edp->hwTailP);
243 dbg ("%08x", edp->hwHeadP);
244 dbg ("%08x", edp->hwNextED);
248 static char * hcfs2string (int state)
251 case OHCI_USB_RESET: return "reset";
252 case OHCI_USB_RESUME: return "resume";
253 case OHCI_USB_OPER: return "operational";
254 case OHCI_USB_SUSPEND: return "suspend";
259 /* dump control and status registers */
260 static void ohci_dump_status (ohci_t *controller)
262 struct ohci_regs *regs = controller->regs;
265 temp = readl (®s->revision) & 0xff;
267 dbg ("spec %d.%d", (temp >> 4), (temp & 0x0f));
269 temp = readl (®s->control);
270 dbg ("control: 0x%08x%s%s%s HCFS=%s%s%s%s%s CBSR=%d", temp,
271 (temp & OHCI_CTRL_RWE) ? " RWE" : "",
272 (temp & OHCI_CTRL_RWC) ? " RWC" : "",
273 (temp & OHCI_CTRL_IR) ? " IR" : "",
274 hcfs2string (temp & OHCI_CTRL_HCFS),
275 (temp & OHCI_CTRL_BLE) ? " BLE" : "",
276 (temp & OHCI_CTRL_CLE) ? " CLE" : "",
277 (temp & OHCI_CTRL_IE) ? " IE" : "",
278 (temp & OHCI_CTRL_PLE) ? " PLE" : "",
279 temp & OHCI_CTRL_CBSR
282 temp = readl (®s->cmdstatus);
283 dbg ("cmdstatus: 0x%08x SOC=%d%s%s%s%s", temp,
284 (temp & OHCI_SOC) >> 16,
285 (temp & OHCI_OCR) ? " OCR" : "",
286 (temp & OHCI_BLF) ? " BLF" : "",
287 (temp & OHCI_CLF) ? " CLF" : "",
288 (temp & OHCI_HCR) ? " HCR" : ""
291 ohci_dump_intr_mask ("intrstatus", readl (®s->intrstatus));
292 ohci_dump_intr_mask ("intrenable", readl (®s->intrenable));
294 maybe_print_eds ("ed_periodcurrent", readl (®s->ed_periodcurrent));
296 maybe_print_eds ("ed_controlhead", readl (®s->ed_controlhead));
297 maybe_print_eds ("ed_controlcurrent", readl (®s->ed_controlcurrent));
299 maybe_print_eds ("ed_bulkhead", readl (®s->ed_bulkhead));
300 maybe_print_eds ("ed_bulkcurrent", readl (®s->ed_bulkcurrent));
302 maybe_print_eds ("donehead", readl (®s->donehead));
305 static void ohci_dump_roothub (ohci_t *controller, int verbose)
309 temp = roothub_a (controller);
310 ndp = (temp & RH_A_NDP);
313 dbg ("roothub.a: %08x POTPGT=%d%s%s%s%s%s NDP=%d", temp,
314 ((temp & RH_A_POTPGT) >> 24) & 0xff,
315 (temp & RH_A_NOCP) ? " NOCP" : "",
316 (temp & RH_A_OCPM) ? " OCPM" : "",
317 (temp & RH_A_DT) ? " DT" : "",
318 (temp & RH_A_NPS) ? " NPS" : "",
319 (temp & RH_A_PSM) ? " PSM" : "",
322 temp = roothub_b (controller);
323 dbg ("roothub.b: %08x PPCM=%04x DR=%04x",
325 (temp & RH_B_PPCM) >> 16,
328 temp = roothub_status (controller);
329 dbg ("roothub.status: %08x%s%s%s%s%s%s",
331 (temp & RH_HS_CRWE) ? " CRWE" : "",
332 (temp & RH_HS_OCIC) ? " OCIC" : "",
333 (temp & RH_HS_LPSC) ? " LPSC" : "",
334 (temp & RH_HS_DRWE) ? " DRWE" : "",
335 (temp & RH_HS_OCI) ? " OCI" : "",
336 (temp & RH_HS_LPS) ? " LPS" : ""
340 for (i = 0; i < ndp; i++) {
341 temp = roothub_portstatus (controller, i);
342 dbg ("roothub.portstatus [%d] = 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s",
345 (temp & RH_PS_PRSC) ? " PRSC" : "",
346 (temp & RH_PS_OCIC) ? " OCIC" : "",
347 (temp & RH_PS_PSSC) ? " PSSC" : "",
348 (temp & RH_PS_PESC) ? " PESC" : "",
349 (temp & RH_PS_CSC) ? " CSC" : "",
351 (temp & RH_PS_LSDA) ? " LSDA" : "",
352 (temp & RH_PS_PPS) ? " PPS" : "",
353 (temp & RH_PS_PRS) ? " PRS" : "",
354 (temp & RH_PS_POCI) ? " POCI" : "",
355 (temp & RH_PS_PSS) ? " PSS" : "",
357 (temp & RH_PS_PES) ? " PES" : "",
358 (temp & RH_PS_CCS) ? " CCS" : ""
363 static void ohci_dump (ohci_t *controller, int verbose)
365 dbg ("OHCI controller usb-%s state", controller->slot_name);
367 /* dumps some of the state we know about */
368 ohci_dump_status (controller);
370 ep_print_int_eds (controller, "hcca");
371 dbg ("hcca frame #%04x", controller->hcca->frame_no);
372 ohci_dump_roothub (controller, 1);
378 /*-------------------------------------------------------------------------*
379 * Interface functions (URB)
380 *-------------------------------------------------------------------------*/
382 /* get a transfer request */
384 int sohci_submit_job(struct usb_device *dev, unsigned long pipe, void *buffer,
385 int transfer_len, struct devrequest *setup, int interval)
389 urb_priv_t *purb_priv;
394 /* when controller's hung, permit only roothub cleanup attempts
395 * such as powering down ports */
396 if (ohci->disabled) {
397 err("sohci_submit_job: EPIPE");
401 /* if we have an unfinished URB from previous transaction let's
402 * fail and scream as quickly as possible so as not to corrupt
403 * further communication */
405 err("sohci_submit_job: URB NOT FINISHED");
408 /* we're about to begin a new transaction here so mark the URB unfinished */
411 /* every endpoint has a ed, locate and fill it */
412 if (!(ed = ep_add_ed (dev, pipe))) {
413 err("sohci_submit_job: ENOMEM");
417 /* for the private part of the URB we need the number of TDs (size) */
418 switch (usb_pipetype (pipe)) {
419 case PIPE_BULK: /* one TD for every 4096 Byte */
420 size = (transfer_len - 1) / 4096 + 1;
422 case PIPE_CONTROL: /* 1 TD for setup, 1 for ACK and 1 for every 4096 B */
423 size = (transfer_len == 0)? 2:
424 (transfer_len - 1) / 4096 + 3;
428 if (size >= (N_URB_TD - 1)) {
429 err("need %d TDs, only have %d", size, N_URB_TD);
432 purb_priv = &urb_priv;
433 purb_priv->pipe = pipe;
435 /* fill the private part of the URB */
436 purb_priv->length = size;
438 purb_priv->actual_length = 0;
440 /* allocate the TDs */
441 /* note that td[0] was allocated in ep_add_ed */
442 for (i = 0; i < size; i++) {
443 purb_priv->td[i] = td_alloc (dev);
444 if (!purb_priv->td[i]) {
445 purb_priv->length = i;
446 urb_free_priv (purb_priv);
447 err("sohci_submit_job: ENOMEM");
452 if (ed->state == ED_NEW || (ed->state & ED_DEL)) {
453 urb_free_priv (purb_priv);
454 err("sohci_submit_job: EINVAL");
458 /* link the ed into a chain if is not already */
459 if (ed->state != ED_OPER)
462 /* fill the TDs and link it to the ed */
463 td_submit_job(dev, pipe, buffer, transfer_len, setup, purb_priv, interval);
468 /*-------------------------------------------------------------------------*/
471 /* tell us the current USB frame number */
473 static int sohci_get_current_frame_number (struct usb_device *usb_dev)
475 ohci_t *ohci = &gohci;
477 return m16_swap (ohci->hcca->frame_no);
481 /*-------------------------------------------------------------------------*
482 * ED handling functions
483 *-------------------------------------------------------------------------*/
485 /* link an ed into one of the HC chains */
487 static int ep_link (ohci_t *ohci, ed_t *edi)
489 volatile ed_t *ed = edi;
496 if (ohci->ed_controltail == NULL) {
497 writel (ed, &ohci->regs->ed_controlhead);
499 ohci->ed_controltail->hwNextED = (__u32)m32_swap (ed);
501 ed->ed_prev = ohci->ed_controltail;
502 if (!ohci->ed_controltail && !ohci->ed_rm_list[0] &&
503 !ohci->ed_rm_list[1] && !ohci->sleeping) {
504 ohci->hc_control |= OHCI_CTRL_CLE;
505 writel (ohci->hc_control, &ohci->regs->control);
507 ohci->ed_controltail = edi;
512 if (ohci->ed_bulktail == NULL) {
513 writel (ed, &ohci->regs->ed_bulkhead);
515 ohci->ed_bulktail->hwNextED = (__u32)m32_swap (ed);
517 ed->ed_prev = ohci->ed_bulktail;
518 if (!ohci->ed_bulktail && !ohci->ed_rm_list[0] &&
519 !ohci->ed_rm_list[1] && !ohci->sleeping) {
520 ohci->hc_control |= OHCI_CTRL_BLE;
521 writel (ohci->hc_control, &ohci->regs->control);
523 ohci->ed_bulktail = edi;
529 /*-------------------------------------------------------------------------*/
531 /* unlink an ed from one of the HC chains.
532 * just the link to the ed is unlinked.
533 * the link from the ed still points to another operational ed or 0
534 * so the HC can eventually finish the processing of the unlinked ed */
536 static int ep_unlink (ohci_t *ohci, ed_t *ed)
538 ed->hwINFO |= m32_swap (OHCI_ED_SKIP);
542 if (ed->ed_prev == NULL) {
544 ohci->hc_control &= ~OHCI_CTRL_CLE;
545 writel (ohci->hc_control, &ohci->regs->control);
547 writel (m32_swap (*((__u32 *)&ed->hwNextED)), &ohci->regs->ed_controlhead);
549 ed->ed_prev->hwNextED = ed->hwNextED;
551 if (ohci->ed_controltail == ed) {
552 ohci->ed_controltail = ed->ed_prev;
554 ((ed_t *)m32_swap (*((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;
559 if (ed->ed_prev == NULL) {
561 ohci->hc_control &= ~OHCI_CTRL_BLE;
562 writel (ohci->hc_control, &ohci->regs->control);
564 writel (m32_swap (*((__u32 *)&ed->hwNextED)), &ohci->regs->ed_bulkhead);
566 ed->ed_prev->hwNextED = ed->hwNextED;
568 if (ohci->ed_bulktail == ed) {
569 ohci->ed_bulktail = ed->ed_prev;
571 ((ed_t *)m32_swap (*((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;
575 ed->state = ED_UNLINK;
580 /*-------------------------------------------------------------------------*/
582 /* add/reinit an endpoint; this should be done once at the usb_set_configuration command,
583 * but the USB stack is a little bit stateless so we do it at every transaction
584 * if the state of the ed is ED_NEW then a dummy td is added and the state is changed to ED_UNLINK
585 * in all other cases the state is left unchanged
586 * the ed info fields are setted anyway even though most of them should not change */
588 static ed_t * ep_add_ed (struct usb_device *usb_dev, unsigned long pipe)
594 ed = ed_ret = &ohci_dev.ed[(usb_pipeendpoint (pipe) << 1) |
595 (usb_pipecontrol (pipe)? 0: usb_pipeout (pipe))];
597 if ((ed->state & ED_DEL) || (ed->state & ED_URB_DEL)) {
598 err("ep_add_ed: pending delete");
599 /* pending delete request */
603 if (ed->state == ED_NEW) {
604 ed->hwINFO = m32_swap (OHCI_ED_SKIP); /* skip ed */
605 /* dummy td; end of td list for ed */
606 td = td_alloc (usb_dev);
607 ed->hwTailP = (__u32)m32_swap (td);
608 ed->hwHeadP = ed->hwTailP;
609 ed->state = ED_UNLINK;
610 ed->type = usb_pipetype (pipe);
614 ed->hwINFO = m32_swap (usb_pipedevice (pipe)
615 | usb_pipeendpoint (pipe) << 7
616 | (usb_pipeisoc (pipe)? 0x8000: 0)
617 | (usb_pipecontrol (pipe)? 0: (usb_pipeout (pipe)? 0x800: 0x1000))
618 | usb_pipeslow (pipe) << 13
619 | usb_maxpacket (usb_dev, pipe) << 16);
624 /*-------------------------------------------------------------------------*
625 * TD handling functions
626 *-------------------------------------------------------------------------*/
628 /* enqueue next TD for this URB (OHCI spec 5.2.8.2) */
630 static void td_fill (ohci_t *ohci, unsigned int info,
632 struct usb_device *dev, int index, urb_priv_t *urb_priv)
634 volatile td_t *td, *td_pt;
635 #ifdef OHCI_FILL_TRACE
639 if (index > urb_priv->length) {
640 err("index > length");
643 /* use this td as the next dummy */
644 td_pt = urb_priv->td [index];
647 /* fill the old dummy TD */
648 td = urb_priv->td [index] = (td_t *)(m32_swap (urb_priv->ed->hwTailP) & ~0xf);
650 td->ed = urb_priv->ed;
651 td->next_dl_td = NULL;
653 td->data = (__u32)data;
654 #ifdef OHCI_FILL_TRACE
655 if (usb_pipebulk(urb_priv->pipe) && usb_pipeout(urb_priv->pipe)) {
656 for (i = 0; i < len; i++)
657 printf("td->data[%d] %#2x ",i, ((unsigned char *)td->data)[i]);
664 td->hwINFO = (__u32)m32_swap (info);
665 td->hwCBP = (__u32)m32_swap (data);
667 td->hwBE = (__u32)m32_swap (data + len - 1);
670 td->hwNextTD = (__u32)m32_swap (td_pt);
672 /* append to queue */
673 td->ed->hwTailP = td->hwNextTD;
676 /*-------------------------------------------------------------------------*/
678 /* prepare all TDs of a transfer */
680 static void td_submit_job (struct usb_device *dev, unsigned long pipe, void *buffer,
681 int transfer_len, struct devrequest *setup, urb_priv_t *urb, int interval)
683 ohci_t *ohci = &gohci;
684 int data_len = transfer_len;
688 unsigned int toggle = 0;
690 /* OHCI handles the DATA-toggles itself, we just use the USB-toggle bits for reseting */
691 if(usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe))) {
692 toggle = TD_T_TOGGLE;
695 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 1);
703 switch (usb_pipetype (pipe)) {
705 info = usb_pipeout (pipe)?
706 TD_CC | TD_DP_OUT : TD_CC | TD_DP_IN ;
707 while(data_len > 4096) {
708 td_fill (ohci, info | (cnt? TD_T_TOGGLE:toggle), data, 4096, dev, cnt, urb);
709 data += 4096; data_len -= 4096; cnt++;
711 info = usb_pipeout (pipe)?
712 TD_CC | TD_DP_OUT : TD_CC | TD_R | TD_DP_IN ;
713 td_fill (ohci, info | (cnt? TD_T_TOGGLE:toggle), data, data_len, dev, cnt, urb);
717 writel (OHCI_BLF, &ohci->regs->cmdstatus); /* start bulk list */
721 info = TD_CC | TD_DP_SETUP | TD_T_DATA0;
722 td_fill (ohci, info, setup, 8, dev, cnt++, urb);
724 info = usb_pipeout (pipe)?
725 TD_CC | TD_R | TD_DP_OUT | TD_T_DATA1 : TD_CC | TD_R | TD_DP_IN | TD_T_DATA1;
726 /* NOTE: mishandles transfers >8K, some >4K */
727 td_fill (ohci, info, data, data_len, dev, cnt++, urb);
729 info = usb_pipeout (pipe)?
730 TD_CC | TD_DP_IN | TD_T_DATA1: TD_CC | TD_DP_OUT | TD_T_DATA1;
731 td_fill (ohci, info, data, 0, dev, cnt++, urb);
733 writel (OHCI_CLF, &ohci->regs->cmdstatus); /* start Control list */
736 if (urb->length != cnt)
737 dbg("TD LENGTH %d != CNT %d", urb->length, cnt);
740 /*-------------------------------------------------------------------------*
741 * Done List handling functions
742 *-------------------------------------------------------------------------*/
745 /* calculate the transfer length and update the urb */
747 static void dl_transfer_length(td_t * td)
749 __u32 tdINFO, tdBE, tdCBP;
750 urb_priv_t *lurb_priv = &urb_priv;
752 tdINFO = m32_swap (td->hwINFO);
753 tdBE = m32_swap (td->hwBE);
754 tdCBP = m32_swap (td->hwCBP);
757 if (!(usb_pipecontrol(lurb_priv->pipe) &&
758 ((td->index == 0) || (td->index == lurb_priv->length - 1)))) {
761 lurb_priv->actual_length += tdBE - td->data + 1;
763 lurb_priv->actual_length += tdCBP - td->data;
768 /*-------------------------------------------------------------------------*/
770 /* replies to the request have to be on a FIFO basis so
771 * we reverse the reversed done-list */
773 static td_t * dl_reverse_done_list (ohci_t *ohci)
777 td_t *td_list = NULL;
778 urb_priv_t *lurb_priv = NULL;
780 td_list_hc = m32_swap (ohci->hcca->done_head) & 0xfffffff0;
781 ohci->hcca->done_head = 0;
784 td_list = (td_t *)td_list_hc;
786 if (TD_CC_GET (m32_swap (td_list->hwINFO))) {
787 lurb_priv = &urb_priv;
788 dbg(" USB-error/status: %x : %p",
789 TD_CC_GET (m32_swap (td_list->hwINFO)), td_list);
790 if (td_list->ed->hwHeadP & m32_swap (0x1)) {
791 if (lurb_priv && ((td_list->index + 1) < lurb_priv->length)) {
792 td_list->ed->hwHeadP =
793 (lurb_priv->td[lurb_priv->length - 1]->hwNextTD & m32_swap (0xfffffff0)) |
794 (td_list->ed->hwHeadP & m32_swap (0x2));
795 lurb_priv->td_cnt += lurb_priv->length - td_list->index - 1;
797 td_list->ed->hwHeadP &= m32_swap (0xfffffff2);
801 td_list->next_dl_td = td_rev;
803 td_list_hc = m32_swap (td_list->hwNextTD) & 0xfffffff0;
809 /*-------------------------------------------------------------------------*/
812 static int dl_done_list (ohci_t *ohci, td_t *td_list)
814 td_t *td_list_next = NULL;
819 urb_priv_t *lurb_priv;
820 __u32 tdINFO, edHeadP, edTailP;
823 td_list_next = td_list->next_dl_td;
825 lurb_priv = &urb_priv;
826 tdINFO = m32_swap (td_list->hwINFO);
830 dl_transfer_length(td_list);
832 /* error code of transfer */
833 cc = TD_CC_GET (tdINFO);
835 dbg("ConditionCode %#x", cc);
836 stat = cc_to_error[cc];
839 /* see if this done list makes for all TD's of current URB,
840 * and mark the URB finished if so */
841 if (++(lurb_priv->td_cnt) == lurb_priv->length) {
842 if ((ed->state & (ED_OPER | ED_UNLINK)))
845 dbg("dl_done_list: strange.., ED state %x, ed->state\n");
847 dbg("dl_done_list: processing TD %x, len %x\n", lurb_priv->td_cnt,
850 if (ed->state != ED_NEW) {
851 edHeadP = m32_swap (ed->hwHeadP) & 0xfffffff0;
852 edTailP = m32_swap (ed->hwTailP);
854 /* unlink eds if they are not busy */
855 if ((edHeadP == edTailP) && (ed->state == ED_OPER))
856 ep_unlink (ohci, ed);
859 td_list = td_list_next;
864 /*-------------------------------------------------------------------------*
866 *-------------------------------------------------------------------------*/
868 /* Device descriptor */
869 static __u8 root_hub_dev_des[] =
871 0x12, /* __u8 bLength; */
872 0x01, /* __u8 bDescriptorType; Device */
873 0x10, /* __u16 bcdUSB; v1.1 */
875 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */
876 0x00, /* __u8 bDeviceSubClass; */
877 0x00, /* __u8 bDeviceProtocol; */
878 0x08, /* __u8 bMaxPacketSize0; 8 Bytes */
879 0x00, /* __u16 idVendor; */
881 0x00, /* __u16 idProduct; */
883 0x00, /* __u16 bcdDevice; */
885 0x00, /* __u8 iManufacturer; */
886 0x01, /* __u8 iProduct; */
887 0x00, /* __u8 iSerialNumber; */
888 0x01 /* __u8 bNumConfigurations; */
892 /* Configuration descriptor */
893 static __u8 root_hub_config_des[] =
895 0x09, /* __u8 bLength; */
896 0x02, /* __u8 bDescriptorType; Configuration */
897 0x19, /* __u16 wTotalLength; */
899 0x01, /* __u8 bNumInterfaces; */
900 0x01, /* __u8 bConfigurationValue; */
901 0x00, /* __u8 iConfiguration; */
902 0x40, /* __u8 bmAttributes;
903 Bit 7: Bus-powered, 6: Self-powered, 5 Remote-wakwup, 4..0: resvd */
904 0x00, /* __u8 MaxPower; */
907 0x09, /* __u8 if_bLength; */
908 0x04, /* __u8 if_bDescriptorType; Interface */
909 0x00, /* __u8 if_bInterfaceNumber; */
910 0x00, /* __u8 if_bAlternateSetting; */
911 0x01, /* __u8 if_bNumEndpoints; */
912 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */
913 0x00, /* __u8 if_bInterfaceSubClass; */
914 0x00, /* __u8 if_bInterfaceProtocol; */
915 0x00, /* __u8 if_iInterface; */
918 0x07, /* __u8 ep_bLength; */
919 0x05, /* __u8 ep_bDescriptorType; Endpoint */
920 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */
921 0x03, /* __u8 ep_bmAttributes; Interrupt */
922 0x02, /* __u16 ep_wMaxPacketSize; ((MAX_ROOT_PORTS + 1) / 8 */
924 0xff /* __u8 ep_bInterval; 255 ms */
927 static unsigned char root_hub_str_index0[] =
929 0x04, /* __u8 bLength; */
930 0x03, /* __u8 bDescriptorType; String-descriptor */
931 0x09, /* __u8 lang ID */
932 0x04, /* __u8 lang ID */
935 static unsigned char root_hub_str_index1[] =
937 28, /* __u8 bLength; */
938 0x03, /* __u8 bDescriptorType; String-descriptor */
939 'O', /* __u8 Unicode */
940 0, /* __u8 Unicode */
941 'H', /* __u8 Unicode */
942 0, /* __u8 Unicode */
943 'C', /* __u8 Unicode */
944 0, /* __u8 Unicode */
945 'I', /* __u8 Unicode */
946 0, /* __u8 Unicode */
947 ' ', /* __u8 Unicode */
948 0, /* __u8 Unicode */
949 'R', /* __u8 Unicode */
950 0, /* __u8 Unicode */
951 'o', /* __u8 Unicode */
952 0, /* __u8 Unicode */
953 'o', /* __u8 Unicode */
954 0, /* __u8 Unicode */
955 't', /* __u8 Unicode */
956 0, /* __u8 Unicode */
957 ' ', /* __u8 Unicode */
958 0, /* __u8 Unicode */
959 'H', /* __u8 Unicode */
960 0, /* __u8 Unicode */
961 'u', /* __u8 Unicode */
962 0, /* __u8 Unicode */
963 'b', /* __u8 Unicode */
964 0, /* __u8 Unicode */
967 /* Hub class-specific descriptor is constructed dynamically */
970 /*-------------------------------------------------------------------------*/
972 #define OK(x) len = (x); break
974 #define WR_RH_STAT(x) {info("WR:status %#8x", (x));writel((x), &gohci.regs->roothub.status);}
975 #define WR_RH_PORTSTAT(x) {info("WR:portstatus[%d] %#8x", wIndex-1, (x));writel((x), &gohci.regs->roothub.portstatus[wIndex-1]);}
977 #define WR_RH_STAT(x) writel((x), &gohci.regs->roothub.status)
978 #define WR_RH_PORTSTAT(x) writel((x), &gohci.regs->roothub.portstatus[wIndex-1])
980 #define RD_RH_STAT roothub_status(&gohci)
981 #define RD_RH_PORTSTAT roothub_portstatus(&gohci,wIndex-1)
983 /* request to virtual root hub */
985 int rh_check_port_status(ohci_t *controller)
991 temp = roothub_a (controller);
992 ndp = (temp & RH_A_NDP);
993 for (i = 0; i < ndp; i++) {
994 temp = roothub_portstatus (controller, i);
995 /* check for a device disconnect */
996 if (((temp & (RH_PS_PESC | RH_PS_CSC)) ==
997 (RH_PS_PESC | RH_PS_CSC)) &&
998 ((temp & RH_PS_CCS) == 0)) {
1006 static int ohci_submit_rh_msg(struct usb_device *dev, unsigned long pipe,
1007 void *buffer, int transfer_len, struct devrequest *cmd)
1009 void * data = buffer;
1010 int leni = transfer_len;
1014 __u8 *data_buf = (__u8 *)datab;
1021 urb_priv.actual_length = 0;
1022 pkt_print(dev, pipe, buffer, transfer_len, cmd, "SUB(rh)", usb_pipein(pipe));
1026 if (usb_pipeint(pipe)) {
1027 info("Root-Hub submit IRQ: NOT implemented");
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);
1036 info("Root-Hub: adr: %2x cmd(%1x): %08x %04x %04x %04x",
1037 dev->devnum, 8, bmRType_bReq, wValue, wIndex, wLength);
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
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));
1058 case RH_GET_STATUS | RH_OTHER | RH_CLASS:
1059 *(__u32 *) data_buf = m32_swap (RD_RH_PORTSTAT); OK (4);
1061 case RH_CLEAR_FEATURE | RH_ENDPOINT:
1063 case (RH_ENDPOINT_STALL): OK (0);
1067 case RH_CLEAR_FEATURE | RH_CLASS:
1069 case RH_C_HUB_LOCAL_POWER:
1071 case (RH_C_HUB_OVER_CURRENT):
1072 WR_RH_STAT(RH_HS_OCIC); OK (0);
1076 case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
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);
1097 case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
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);
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 );
1114 case RH_SET_ADDRESS: gohci.rh.devnum = wValue; OK(0);
1116 case RH_GET_DESCRIPTOR:
1117 switch ((wValue & 0xff00) >> 8) {
1118 case (0x01): /* device descriptor */
1119 len = min_t(unsigned int,
1122 sizeof (root_hub_dev_des),
1124 data_buf = root_hub_dev_des; OK(len);
1125 case (0x02): /* configuration descriptor */
1126 len = min_t(unsigned int,
1129 sizeof (root_hub_config_des),
1131 data_buf = root_hub_config_des; OK(len);
1132 case (0x03): /* string descriptors */
1133 if(wValue==0x0300) {
1134 len = min_t(unsigned int,
1137 sizeof (root_hub_str_index0),
1139 data_buf = root_hub_str_index0;
1142 if(wValue==0x0301) {
1143 len = min_t(unsigned int,
1146 sizeof (root_hub_str_index1),
1148 data_buf = root_hub_str_index1;
1152 stat = USB_ST_STALLED;
1156 case RH_GET_DESCRIPTOR | RH_CLASS:
1158 __u32 temp = roothub_a (&gohci);
1160 data_buf [0] = 9; /* min length; */
1161 data_buf [1] = 0x29;
1162 data_buf [2] = temp & RH_A_NDP;
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;
1171 /* corresponds to data_buf[4-7] */
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;
1180 data_buf [8] = (temp & RH_B_DR) >> 8;
1181 data_buf [10] = data_buf [9] = 0xff;
1184 len = min_t(unsigned int, leni,
1185 min_t(unsigned int, data_buf [0], wLength));
1189 case RH_GET_CONFIGURATION: *(__u8 *) data_buf = 0x01; OK (1);
1191 case RH_SET_CONFIGURATION: WR_RH_STAT (0x10000); OK (0);
1194 dbg ("unsupported root hub command");
1195 stat = USB_ST_STALLED;
1199 ohci_dump_roothub (&gohci, 1);
1204 len = min_t(int, len, leni);
1205 if (data != data_buf)
1206 memcpy (data, data_buf, len);
1212 urb_priv.actual_length = transfer_len;
1213 pkt_print(dev, pipe, buffer, transfer_len, cmd, "RET(rh)", 0/*usb_pipein(pipe)*/);
1221 /*-------------------------------------------------------------------------*/
1223 /* common code for handling submit messages - used for all but root hub */
1225 int submit_common_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1226 int transfer_len, struct devrequest *setup, int interval)
1229 int maxsize = usb_maxpacket(dev, pipe);
1232 /* device pulled? Shortcut the action. */
1233 if (devgone == dev) {
1234 dev->status = USB_ST_CRC_ERR;
1239 urb_priv.actual_length = 0;
1240 pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB", usb_pipein(pipe));
1245 err("submit_common_message: pipesize for pipe %lx is zero",
1250 if (sohci_submit_job(dev, pipe, buffer, transfer_len, setup, interval) < 0) {
1251 err("sohci_submit_job failed");
1256 /* ohci_dump_status(&gohci); */
1258 /* allow more time for a BULK device to react - some are slow */
1259 #define BULK_TO 5000 /* timeout in milliseconds */
1260 if (usb_pipebulk(pipe))
1265 /* wait for it to complete */
1267 /* check whether the controller is done */
1268 stat = hc_interrupt();
1271 stat = USB_ST_CRC_ERR;
1275 /* NOTE: since we are not interrupt driven in U-Boot and always
1276 * handle only one URB at a time, we cannot assume the
1277 * transaction finished on the first successful return from
1278 * hc_interrupt().. unless the flag for current URB is set,
1279 * meaning that all TD's to/from device got actually
1280 * transferred and processed. If the current URB is not
1281 * finished we need to re-iterate this loop so as
1282 * hc_interrupt() gets called again as there needs to be some
1283 * more TD's to process still */
1284 if ((stat >= 0) && (stat != 0xff) && (urb_finished)) {
1285 /* 0xff is returned for an SF-interrupt */
1295 err("CTL:TIMEOUT ");
1296 dbg("submit_common_msg: TO status %x\n", stat);
1297 stat = USB_ST_CRC_ERR;
1304 /* we got an Root Hub Status Change interrupt */
1307 ohci_dump_roothub (&gohci, 1);
1311 timeout = rh_check_port_status(&gohci);
1313 #if 0 /* this does nothing useful, but leave it here in case that changes */
1314 /* the called routine adds 1 to the passed value */
1315 usb_hub_port_connect_change(gohci.rh.dev, timeout - 1);
1319 * This is potentially dangerous because it assumes
1320 * that only one device is ever plugged in!
1328 dev->act_len = transfer_len;
1331 pkt_print(dev, pipe, buffer, transfer_len, setup, "RET(ctlr)", usb_pipein(pipe));
1336 /* free TDs in urb_priv */
1337 urb_free_priv (&urb_priv);
1341 /* submit routines called from usb.c */
1342 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1345 info("submit_bulk_msg");
1346 return submit_common_msg(dev, pipe, buffer, transfer_len, NULL, 0);
1349 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1350 int transfer_len, struct devrequest *setup)
1352 int maxsize = usb_maxpacket(dev, pipe);
1354 info("submit_control_msg");
1356 urb_priv.actual_length = 0;
1357 pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB", usb_pipein(pipe));
1362 err("submit_control_message: pipesize for pipe %lx is zero",
1366 if (((pipe >> 8) & 0x7f) == gohci.rh.devnum) {
1368 /* root hub - redirect */
1369 return ohci_submit_rh_msg(dev, pipe, buffer, transfer_len,
1373 return submit_common_msg(dev, pipe, buffer, transfer_len, setup, 0);
1376 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1377 int transfer_len, int interval)
1379 info("submit_int_msg");
1383 /*-------------------------------------------------------------------------*
1385 *-------------------------------------------------------------------------*/
1387 /* reset the HC and BUS */
1389 static int hc_reset (ohci_t *ohci)
1392 int smm_timeout = 50; /* 0,5 sec */
1394 if (readl (&ohci->regs->control) & OHCI_CTRL_IR) { /* SMM owns the HC */
1395 writel (OHCI_OCR, &ohci->regs->cmdstatus); /* request ownership */
1396 info("USB HC TakeOver from SMM");
1397 while (readl (&ohci->regs->control) & OHCI_CTRL_IR) {
1399 if (--smm_timeout == 0) {
1400 err("USB HC TakeOver failed!");
1406 /* Disable HC interrupts */
1407 writel (OHCI_INTR_MIE, &ohci->regs->intrdisable);
1409 dbg("USB HC reset_hc usb-%s: ctrl = 0x%X ;",
1411 readl (&ohci->regs->control));
1413 /* Reset USB (needed by some controllers) */
1414 writel (0, &ohci->regs->control);
1416 /* HC Reset requires max 10 us delay */
1417 writel (OHCI_HCR, &ohci->regs->cmdstatus);
1418 while ((readl (&ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
1419 if (--timeout == 0) {
1420 err("USB HC reset timed out!");
1428 /*-------------------------------------------------------------------------*/
1430 /* Start an OHCI controller, set the BUS operational
1432 * connect the virtual root hub */
1434 static int hc_start (ohci_t * ohci)
1437 unsigned int fminterval;
1441 /* Tell the controller where the control and bulk lists are
1442 * The lists are empty now. */
1444 writel (0, &ohci->regs->ed_controlhead);
1445 writel (0, &ohci->regs->ed_bulkhead);
1447 writel ((__u32)ohci->hcca, &ohci->regs->hcca); /* a reset clears this */
1449 fminterval = 0x2edf;
1450 writel ((fminterval * 9) / 10, &ohci->regs->periodicstart);
1451 fminterval |= ((((fminterval - 210) * 6) / 7) << 16);
1452 writel (fminterval, &ohci->regs->fminterval);
1453 writel (0x628, &ohci->regs->lsthresh);
1455 /* start controller operations */
1456 ohci->hc_control = OHCI_CONTROL_INIT | OHCI_USB_OPER;
1458 writel (ohci->hc_control, &ohci->regs->control);
1460 /* disable all interrupts */
1461 mask = (OHCI_INTR_SO | OHCI_INTR_WDH | OHCI_INTR_SF | OHCI_INTR_RD |
1462 OHCI_INTR_UE | OHCI_INTR_FNO | OHCI_INTR_RHSC |
1463 OHCI_INTR_OC | OHCI_INTR_MIE);
1464 writel (mask, &ohci->regs->intrdisable);
1465 /* clear all interrupts */
1466 mask &= ~OHCI_INTR_MIE;
1467 writel (mask, &ohci->regs->intrstatus);
1468 /* Choose the interrupts we care about now - but w/o MIE */
1469 mask = OHCI_INTR_RHSC | OHCI_INTR_UE | OHCI_INTR_WDH | OHCI_INTR_SO;
1470 writel (mask, &ohci->regs->intrenable);
1473 /* required for AMD-756 and some Mac platforms */
1474 writel ((roothub_a (ohci) | RH_A_NPS) & ~RH_A_PSM,
1475 &ohci->regs->roothub.a);
1476 writel (RH_HS_LPSC, &ohci->regs->roothub.status);
1477 #endif /* OHCI_USE_NPS */
1479 #define mdelay(n) ({unsigned long msec=(n); while (msec--) udelay(1000);})
1480 /* POTPGT delay is bits 24-31, in 2 ms units. */
1481 mdelay ((roothub_a (ohci) >> 23) & 0x1fe);
1483 /* connect the virtual root hub */
1484 ohci->rh.devnum = 0;
1489 /*-------------------------------------------------------------------------*/
1491 /* an interrupt happens */
1496 ohci_t *ohci = &gohci;
1497 struct ohci_regs *regs = ohci->regs;
1501 if ((ohci->hcca->done_head != 0) &&
1502 !(m32_swap (ohci->hcca->done_head) & 0x01)) {
1504 ints = OHCI_INTR_WDH;
1506 } else if ((ints = readl (®s->intrstatus)) == ~(u32)0) {
1508 err ("%s device removed!", ohci->slot_name);
1511 } else if ((ints &= readl (®s->intrenable)) == 0) {
1512 dbg("hc_interrupt: returning..\n");
1516 /* dbg("Interrupt: %x frame: %x", ints, le16_to_cpu (ohci->hcca->frame_no)); */
1518 if (ints & OHCI_INTR_RHSC) {
1523 if (ints & OHCI_INTR_UE) {
1525 err ("OHCI Unrecoverable Error, controller usb-%s disabled",
1527 /* e.g. due to PCI Master/Target Abort */
1530 ohci_dump (ohci, 1);
1534 /* FIXME: be optimistic, hope that bug won't repeat often. */
1535 /* Make some non-interrupt context restart the controller. */
1536 /* Count and limit the retries though; either hardware or */
1537 /* software errors can go forever... */
1542 if (ints & OHCI_INTR_WDH) {
1545 writel (OHCI_INTR_WDH, ®s->intrdisable);
1546 stat = dl_done_list (&gohci, dl_reverse_done_list (&gohci));
1547 writel (OHCI_INTR_WDH, ®s->intrenable);
1550 if (ints & OHCI_INTR_SO) {
1551 dbg("USB Schedule overrun\n");
1552 writel (OHCI_INTR_SO, ®s->intrenable);
1556 /* FIXME: this assumes SOF (1/ms) interrupts don't get lost... */
1557 if (ints & OHCI_INTR_SF) {
1558 unsigned int frame = m16_swap (ohci->hcca->frame_no) & 1;
1560 writel (OHCI_INTR_SF, ®s->intrdisable);
1561 if (ohci->ed_rm_list[frame] != NULL)
1562 writel (OHCI_INTR_SF, ®s->intrenable);
1566 writel (ints, ®s->intrstatus);
1570 /*-------------------------------------------------------------------------*/
1572 /*-------------------------------------------------------------------------*/
1574 /* De-allocate all resources.. */
1576 static void hc_release_ohci (ohci_t *ohci)
1578 dbg ("USB HC release ohci usb-%s", ohci->slot_name);
1580 if (!ohci->disabled)
1584 /*-------------------------------------------------------------------------*/
1587 * low level initalisation routine, called from usb.c
1589 static char ohci_inited = 0;
1591 int usb_lowlevel_init(void)
1593 S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();
1594 S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO();
1597 * Set the 48 MHz UPLL clocking. Values are taken from
1598 * "PLL value selection guide", 6-23, s3c2400_UM.pdf.
1600 clk_power->UPLLCON = ((40 << 12) + (1 << 4) + 2);
1601 gpio->MISCCR |= 0x8; /* 1 = use pads related USB for USB host */
1604 * Enable USB host clock.
1606 clk_power->CLKCON |= (1 << 4);
1608 memset (&gohci, 0, sizeof (ohci_t));
1609 memset (&urb_priv, 0, sizeof (urb_priv_t));
1611 /* align the storage */
1612 if ((__u32)&ghcca[0] & 0xff) {
1613 err("HCCA not aligned!!");
1617 info("aligned ghcca %p", phcca);
1618 memset(&ohci_dev, 0, sizeof(struct ohci_device));
1619 if ((__u32)&ohci_dev.ed[0] & 0x7) {
1620 err("EDs not aligned!!");
1623 memset(gtd, 0, sizeof(td_t) * (NUM_TD + 1));
1624 if ((__u32)gtd & 0x7) {
1625 err("TDs not aligned!!");
1630 memset (phcca, 0, sizeof (struct ohci_hcca));
1635 gohci.regs = (struct ohci_regs *)S3C24X0_USB_HOST_BASE;
1638 gohci.slot_name = "s3c2400";
1640 if (hc_reset (&gohci) < 0) {
1641 hc_release_ohci (&gohci);
1642 /* Initialization failed */
1643 clk_power->CLKCON &= ~(1 << 4);
1647 /* FIXME this is a second HC reset; why?? */
1648 gohci.hc_control = OHCI_USB_RESET;
1649 writel (gohci.hc_control, &gohci.regs->control);
1652 if (hc_start (&gohci) < 0) {
1653 err ("can't start usb-%s", gohci.slot_name);
1654 hc_release_ohci (&gohci);
1655 /* Initialization failed */
1656 clk_power->CLKCON &= ~(1 << 4);
1661 ohci_dump (&gohci, 1);
1671 int usb_lowlevel_stop(void)
1673 S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();
1675 /* this gets called really early - before the controller has */
1676 /* even been initialized! */
1679 /* TODO release any interrupts, etc. */
1680 /* call hc_release_ohci() here ? */
1682 /* may not want to do this */
1683 clk_power->CLKCON &= ~(1 << 4);
1687 #endif /* CONFIG_USB_OHCI */