2 * URB OHCI HCD (Host Controller Driver) for USB on the S3C2400.
5 * Gary Jennejohn, DENX Software Engineering <gj@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 - you MUST define LITTLEENDIAN in the configuration file for the
33 * board or this driver will NOT work!
34 * 2 - this driver is intended for use with USB Mass Storage Devices
35 * (BBB) ONLY. There is NO support for Interrupt or Isochronous pipes!
39 /* #include <pci.h> no PCI on the S3C24X0 */
41 #ifdef CONFIG_USB_OHCI
43 #if defined(CONFIG_S3C2400)
45 #elif defined(CONFIG_S3C2410)
53 #define OHCI_USE_NPS /* force NoPowerSwitching mode */
54 #undef OHCI_VERBOSE_DEBUG /* not always helpful */
57 /* For initializing controller (mask in an HCFS mode too) */
58 #define OHCI_CONTROL_INIT \
59 (OHCI_CTRL_CBSR & 0x3) | OHCI_CTRL_IE | OHCI_CTRL_PLE
61 #define readl(a) (*((vu_long *)(a)))
62 #define writel(a, b) (*((vu_long *)(b)) = ((vu_long)a))
64 #define min_t(type,x,y) ({ type __x = (x); type __y = (y); __x < __y ? __x: __y; })
68 #define dbg(format, arg...) printf("DEBUG: " format "\n", ## arg)
70 #define dbg(format, arg...) do {} while(0)
72 #define err(format, arg...) printf("ERROR: " format "\n", ## arg)
75 #define info(format, arg...) printf("INFO: " format "\n", ## arg)
77 #define info(format, arg...) do {} while(0)
80 #define m16_swap(x) swap_16(x)
81 #define m32_swap(x) swap_32(x)
85 /* this must be aligned to a 256 byte boundary */
86 struct ohci_hcca ghcca[1];
87 /* a pointer to the aligned storage */
88 struct ohci_hcca *phcca;
89 /* this allocates EDs for all possible endpoints */
90 struct ohci_device ohci_dev;
95 /* device which was disconnected */
96 struct usb_device *devgone;
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 /* every endpoint has a ed, locate and fill it */
402 if (!(ed = ep_add_ed (dev, pipe))) {
403 err("sohci_submit_job: ENOMEM");
407 /* for the private part of the URB we need the number of TDs (size) */
408 switch (usb_pipetype (pipe)) {
409 case PIPE_BULK: /* one TD for every 4096 Byte */
410 size = (transfer_len - 1) / 4096 + 1;
412 case PIPE_CONTROL: /* 1 TD for setup, 1 for ACK and 1 for every 4096 B */
413 size = (transfer_len == 0)? 2:
414 (transfer_len - 1) / 4096 + 3;
418 if (size >= (N_URB_TD - 1)) {
419 err("need %d TDs, only have %d", size, N_URB_TD);
422 purb_priv = &urb_priv;
423 purb_priv->pipe = pipe;
425 /* fill the private part of the URB */
426 purb_priv->length = size;
428 purb_priv->actual_length = 0;
430 /* allocate the TDs */
431 /* note that td[0] was allocated in ep_add_ed */
432 for (i = 0; i < size; i++) {
433 purb_priv->td[i] = td_alloc (dev);
434 if (!purb_priv->td[i]) {
435 purb_priv->length = i;
436 urb_free_priv (purb_priv);
437 err("sohci_submit_job: ENOMEM");
442 if (ed->state == ED_NEW || (ed->state & ED_DEL)) {
443 urb_free_priv (purb_priv);
444 err("sohci_submit_job: EINVAL");
448 /* link the ed into a chain if is not already */
449 if (ed->state != ED_OPER)
452 /* fill the TDs and link it to the ed */
453 td_submit_job(dev, pipe, buffer, transfer_len, setup, purb_priv, interval);
458 /*-------------------------------------------------------------------------*/
461 /* tell us the current USB frame number */
463 static int sohci_get_current_frame_number (struct usb_device *usb_dev)
465 ohci_t *ohci = &gohci;
467 return m16_swap (ohci->hcca->frame_no);
471 /*-------------------------------------------------------------------------*
472 * ED handling functions
473 *-------------------------------------------------------------------------*/
475 /* link an ed into one of the HC chains */
477 static int ep_link (ohci_t *ohci, ed_t *edi)
479 volatile ed_t *ed = edi;
486 if (ohci->ed_controltail == NULL) {
487 writel (ed, &ohci->regs->ed_controlhead);
489 ohci->ed_controltail->hwNextED = m32_swap (ed);
491 ed->ed_prev = ohci->ed_controltail;
492 if (!ohci->ed_controltail && !ohci->ed_rm_list[0] &&
493 !ohci->ed_rm_list[1] && !ohci->sleeping) {
494 ohci->hc_control |= OHCI_CTRL_CLE;
495 writel (ohci->hc_control, &ohci->regs->control);
497 ohci->ed_controltail = edi;
502 if (ohci->ed_bulktail == NULL) {
503 writel (ed, &ohci->regs->ed_bulkhead);
505 ohci->ed_bulktail->hwNextED = m32_swap (ed);
507 ed->ed_prev = ohci->ed_bulktail;
508 if (!ohci->ed_bulktail && !ohci->ed_rm_list[0] &&
509 !ohci->ed_rm_list[1] && !ohci->sleeping) {
510 ohci->hc_control |= OHCI_CTRL_BLE;
511 writel (ohci->hc_control, &ohci->regs->control);
513 ohci->ed_bulktail = edi;
519 /*-------------------------------------------------------------------------*/
521 /* unlink an ed from one of the HC chains.
522 * just the link to the ed is unlinked.
523 * the link from the ed still points to another operational ed or 0
524 * so the HC can eventually finish the processing of the unlinked ed */
526 static int ep_unlink (ohci_t *ohci, ed_t *ed)
528 ed->hwINFO |= m32_swap (OHCI_ED_SKIP);
532 if (ed->ed_prev == NULL) {
534 ohci->hc_control &= ~OHCI_CTRL_CLE;
535 writel (ohci->hc_control, &ohci->regs->control);
537 writel (m32_swap (*((__u32 *)&ed->hwNextED)), &ohci->regs->ed_controlhead);
539 ed->ed_prev->hwNextED = ed->hwNextED;
541 if (ohci->ed_controltail == ed) {
542 ohci->ed_controltail = ed->ed_prev;
544 ((ed_t *)m32_swap (*((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;
549 if (ed->ed_prev == NULL) {
551 ohci->hc_control &= ~OHCI_CTRL_BLE;
552 writel (ohci->hc_control, &ohci->regs->control);
554 writel (m32_swap (*((__u32 *)&ed->hwNextED)), &ohci->regs->ed_bulkhead);
556 ed->ed_prev->hwNextED = ed->hwNextED;
558 if (ohci->ed_bulktail == ed) {
559 ohci->ed_bulktail = ed->ed_prev;
561 ((ed_t *)m32_swap (*((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;
565 ed->state = ED_UNLINK;
570 /*-------------------------------------------------------------------------*/
572 /* add/reinit an endpoint; this should be done once at the usb_set_configuration command,
573 * but the USB stack is a little bit stateless so we do it at every transaction
574 * if the state of the ed is ED_NEW then a dummy td is added and the state is changed to ED_UNLINK
575 * in all other cases the state is left unchanged
576 * the ed info fields are setted anyway even though most of them should not change */
578 static ed_t * ep_add_ed (struct usb_device *usb_dev, unsigned long pipe)
584 ed = ed_ret = &ohci_dev.ed[(usb_pipeendpoint (pipe) << 1) |
585 (usb_pipecontrol (pipe)? 0: usb_pipeout (pipe))];
587 if ((ed->state & ED_DEL) || (ed->state & ED_URB_DEL)) {
588 err("ep_add_ed: pending delete");
589 /* pending delete request */
593 if (ed->state == ED_NEW) {
594 ed->hwINFO = m32_swap (OHCI_ED_SKIP); /* skip ed */
595 /* dummy td; end of td list for ed */
596 td = td_alloc (usb_dev);
597 ed->hwTailP = m32_swap (td);
598 ed->hwHeadP = ed->hwTailP;
599 ed->state = ED_UNLINK;
600 ed->type = usb_pipetype (pipe);
604 ed->hwINFO = m32_swap (usb_pipedevice (pipe)
605 | usb_pipeendpoint (pipe) << 7
606 | (usb_pipeisoc (pipe)? 0x8000: 0)
607 | (usb_pipecontrol (pipe)? 0: (usb_pipeout (pipe)? 0x800: 0x1000))
608 | usb_pipeslow (pipe) << 13
609 | usb_maxpacket (usb_dev, pipe) << 16);
614 /*-------------------------------------------------------------------------*
615 * TD handling functions
616 *-------------------------------------------------------------------------*/
618 /* enqueue next TD for this URB (OHCI spec 5.2.8.2) */
620 static void td_fill (ohci_t *ohci, unsigned int info,
622 struct usb_device *dev, int index, urb_priv_t *urb_priv)
624 volatile td_t *td, *td_pt;
625 #ifdef OHCI_FILL_TRACE
629 if (index > urb_priv->length) {
630 err("index > length");
633 /* use this td as the next dummy */
634 td_pt = urb_priv->td [index];
637 /* fill the old dummy TD */
638 td = urb_priv->td [index] = (td_t *)(m32_swap (urb_priv->ed->hwTailP) & ~0xf);
640 td->ed = urb_priv->ed;
641 td->next_dl_td = NULL;
643 td->data = (__u32)data;
644 #ifdef OHCI_FILL_TRACE
645 if ((usb_pipetype(urb_priv->pipe) == PIPE_BULK) && usb_pipeout(urb_priv->pipe)) {
646 for (i = 0; i < len; i++)
647 printf("td->data[%d] %#2x ",i, ((unsigned char *)td->data)[i]);
654 td->hwINFO = m32_swap (info);
655 td->hwCBP = m32_swap (data);
657 td->hwBE = m32_swap (data + len - 1);
660 td->hwNextTD = m32_swap (td_pt);
661 td->hwPSW [0] = m16_swap (((__u32)data & 0x0FFF) | 0xE000);
663 /* append to queue */
664 td->ed->hwTailP = td->hwNextTD;
667 /*-------------------------------------------------------------------------*/
669 /* prepare all TDs of a transfer */
671 static void td_submit_job (struct usb_device *dev, unsigned long pipe, void *buffer,
672 int transfer_len, struct devrequest *setup, urb_priv_t *urb, int interval)
674 ohci_t *ohci = &gohci;
675 int data_len = transfer_len;
679 unsigned int toggle = 0;
681 /* OHCI handles the DATA-toggles itself, we just use the USB-toggle bits for reseting */
682 if(usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe))) {
683 toggle = TD_T_TOGGLE;
686 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 1);
694 switch (usb_pipetype (pipe)) {
696 info = usb_pipeout (pipe)?
697 TD_CC | TD_DP_OUT : TD_CC | TD_DP_IN ;
698 while(data_len > 4096) {
699 td_fill (ohci, info | (cnt? TD_T_TOGGLE:toggle), data, 4096, dev, cnt, urb);
700 data += 4096; data_len -= 4096; cnt++;
702 info = usb_pipeout (pipe)?
703 TD_CC | TD_DP_OUT : TD_CC | TD_R | TD_DP_IN ;
704 td_fill (ohci, info | (cnt? TD_T_TOGGLE:toggle), data, data_len, dev, cnt, urb);
708 writel (OHCI_BLF, &ohci->regs->cmdstatus); /* start bulk list */
712 info = TD_CC | TD_DP_SETUP | TD_T_DATA0;
713 td_fill (ohci, info, setup, 8, dev, cnt++, urb);
715 info = usb_pipeout (pipe)?
716 TD_CC | TD_R | TD_DP_OUT | TD_T_DATA1 : TD_CC | TD_R | TD_DP_IN | TD_T_DATA1;
717 /* NOTE: mishandles transfers >8K, some >4K */
718 td_fill (ohci, info, data, data_len, dev, cnt++, urb);
720 info = usb_pipeout (pipe)?
721 TD_CC | TD_DP_IN | TD_T_DATA1: TD_CC | TD_DP_OUT | TD_T_DATA1;
722 td_fill (ohci, info, data, 0, dev, cnt++, urb);
724 writel (OHCI_CLF, &ohci->regs->cmdstatus); /* start Control list */
727 if (urb->length != cnt)
728 dbg("TD LENGTH %d != CNT %d", urb->length, cnt);
731 /*-------------------------------------------------------------------------*
732 * Done List handling functions
733 *-------------------------------------------------------------------------*/
736 /* calculate the transfer length and update the urb */
738 static void dl_transfer_length(td_t * td)
740 __u32 tdINFO, tdBE, tdCBP;
741 urb_priv_t *lurb_priv = &urb_priv;
743 tdINFO = m32_swap (td->hwINFO);
744 tdBE = m32_swap (td->hwBE);
745 tdCBP = m32_swap (td->hwCBP);
748 if (!(usb_pipetype (lurb_priv->pipe) == PIPE_CONTROL &&
749 ((td->index == 0) || (td->index == lurb_priv->length - 1)))) {
752 lurb_priv->actual_length += tdBE - td->data + 1;
754 lurb_priv->actual_length += tdCBP - td->data;
759 /*-------------------------------------------------------------------------*/
761 /* replies to the request have to be on a FIFO basis so
762 * we reverse the reversed done-list */
764 static td_t * dl_reverse_done_list (ohci_t *ohci)
768 td_t *td_list = NULL;
769 urb_priv_t *lurb_priv = NULL;
771 td_list_hc = m32_swap (ohci->hcca->done_head) & 0xfffffff0;
772 ohci->hcca->done_head = 0;
775 td_list = (td_t *)td_list_hc;
777 if (TD_CC_GET (m32_swap (td_list->hwINFO))) {
778 lurb_priv = &urb_priv;
779 dbg(" USB-error/status: %x : %p",
780 TD_CC_GET (m32_swap (td_list->hwINFO)), td_list);
781 if (td_list->ed->hwHeadP & m32_swap (0x1)) {
782 if (lurb_priv && ((td_list->index + 1) < lurb_priv->length)) {
783 td_list->ed->hwHeadP =
784 (lurb_priv->td[lurb_priv->length - 1]->hwNextTD & m32_swap (0xfffffff0)) |
785 (td_list->ed->hwHeadP & m32_swap (0x2));
786 lurb_priv->td_cnt += lurb_priv->length - td_list->index - 1;
788 td_list->ed->hwHeadP &= m32_swap (0xfffffff2);
792 td_list->next_dl_td = td_rev;
794 td_list_hc = m32_swap (td_list->hwNextTD) & 0xfffffff0;
799 /*-------------------------------------------------------------------------*/
802 static int dl_done_list (ohci_t *ohci, td_t *td_list)
804 td_t *td_list_next = NULL;
809 urb_priv_t *lurb_priv;
810 __u32 tdINFO, edHeadP, edTailP;
813 td_list_next = td_list->next_dl_td;
815 lurb_priv = &urb_priv;
816 tdINFO = m32_swap (td_list->hwINFO);
820 dl_transfer_length(td_list);
822 /* error code of transfer */
823 cc = TD_CC_GET (tdINFO);
825 dbg("ConditionCode %#x", cc);
826 stat = cc_to_error[cc];
829 if (ed->state != ED_NEW) {
830 edHeadP = m32_swap (ed->hwHeadP) & 0xfffffff0;
831 edTailP = m32_swap (ed->hwTailP);
833 /* unlink eds if they are not busy */
834 if ((edHeadP == edTailP) && (ed->state == ED_OPER))
835 ep_unlink (ohci, ed);
838 td_list = td_list_next;
843 /*-------------------------------------------------------------------------*
845 *-------------------------------------------------------------------------*/
847 /* Device descriptor */
848 static __u8 root_hub_dev_des[] =
850 0x12, /* __u8 bLength; */
851 0x01, /* __u8 bDescriptorType; Device */
852 0x10, /* __u16 bcdUSB; v1.1 */
854 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */
855 0x00, /* __u8 bDeviceSubClass; */
856 0x00, /* __u8 bDeviceProtocol; */
857 0x08, /* __u8 bMaxPacketSize0; 8 Bytes */
858 0x00, /* __u16 idVendor; */
860 0x00, /* __u16 idProduct; */
862 0x00, /* __u16 bcdDevice; */
864 0x00, /* __u8 iManufacturer; */
865 0x01, /* __u8 iProduct; */
866 0x00, /* __u8 iSerialNumber; */
867 0x01 /* __u8 bNumConfigurations; */
871 /* Configuration descriptor */
872 static __u8 root_hub_config_des[] =
874 0x09, /* __u8 bLength; */
875 0x02, /* __u8 bDescriptorType; Configuration */
876 0x19, /* __u16 wTotalLength; */
878 0x01, /* __u8 bNumInterfaces; */
879 0x01, /* __u8 bConfigurationValue; */
880 0x00, /* __u8 iConfiguration; */
881 0x40, /* __u8 bmAttributes;
882 Bit 7: Bus-powered, 6: Self-powered, 5 Remote-wakwup, 4..0: resvd */
883 0x00, /* __u8 MaxPower; */
886 0x09, /* __u8 if_bLength; */
887 0x04, /* __u8 if_bDescriptorType; Interface */
888 0x00, /* __u8 if_bInterfaceNumber; */
889 0x00, /* __u8 if_bAlternateSetting; */
890 0x01, /* __u8 if_bNumEndpoints; */
891 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */
892 0x00, /* __u8 if_bInterfaceSubClass; */
893 0x00, /* __u8 if_bInterfaceProtocol; */
894 0x00, /* __u8 if_iInterface; */
897 0x07, /* __u8 ep_bLength; */
898 0x05, /* __u8 ep_bDescriptorType; Endpoint */
899 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */
900 0x03, /* __u8 ep_bmAttributes; Interrupt */
901 0x02, /* __u16 ep_wMaxPacketSize; ((MAX_ROOT_PORTS + 1) / 8 */
903 0xff /* __u8 ep_bInterval; 255 ms */
906 static unsigned char root_hub_str_index0[] =
908 0x04, /* __u8 bLength; */
909 0x03, /* __u8 bDescriptorType; String-descriptor */
910 0x09, /* __u8 lang ID */
911 0x04, /* __u8 lang ID */
914 static unsigned char root_hub_str_index1[] =
916 28, /* __u8 bLength; */
917 0x03, /* __u8 bDescriptorType; String-descriptor */
918 'O', /* __u8 Unicode */
919 0, /* __u8 Unicode */
920 'H', /* __u8 Unicode */
921 0, /* __u8 Unicode */
922 'C', /* __u8 Unicode */
923 0, /* __u8 Unicode */
924 'I', /* __u8 Unicode */
925 0, /* __u8 Unicode */
926 ' ', /* __u8 Unicode */
927 0, /* __u8 Unicode */
928 'R', /* __u8 Unicode */
929 0, /* __u8 Unicode */
930 'o', /* __u8 Unicode */
931 0, /* __u8 Unicode */
932 'o', /* __u8 Unicode */
933 0, /* __u8 Unicode */
934 't', /* __u8 Unicode */
935 0, /* __u8 Unicode */
936 ' ', /* __u8 Unicode */
937 0, /* __u8 Unicode */
938 'H', /* __u8 Unicode */
939 0, /* __u8 Unicode */
940 'u', /* __u8 Unicode */
941 0, /* __u8 Unicode */
942 'b', /* __u8 Unicode */
943 0, /* __u8 Unicode */
946 /* Hub class-specific descriptor is constructed dynamically */
949 /*-------------------------------------------------------------------------*/
951 #define OK(x) len = (x); break
953 #define WR_RH_STAT(x) {info("WR:status %#8x", (x));writel((x), &gohci.regs->roothub.status);}
954 #define WR_RH_PORTSTAT(x) {info("WR:portstatus[%d] %#8x", wIndex-1, (x));writel((x), &gohci.regs->roothub.portstatus[wIndex-1]);}
956 #define WR_RH_STAT(x) writel((x), &gohci.regs->roothub.status)
957 #define WR_RH_PORTSTAT(x) writel((x), &gohci.regs->roothub.portstatus[wIndex-1])
959 #define RD_RH_STAT roothub_status(&gohci)
960 #define RD_RH_PORTSTAT roothub_portstatus(&gohci,wIndex-1)
962 /* request to virtual root hub */
964 int rh_check_port_status(ohci_t *controller)
970 temp = roothub_a (controller);
971 ndp = (temp & RH_A_NDP);
972 for (i = 0; i < ndp; i++) {
973 temp = roothub_portstatus (controller, i);
974 /* check for a device disconnect */
975 if (((temp & (RH_PS_PESC | RH_PS_CSC)) ==
976 (RH_PS_PESC | RH_PS_CSC)) &&
977 ((temp & RH_PS_CCS) == 0)) {
985 static int ohci_submit_rh_msg(struct usb_device *dev, unsigned long pipe,
986 void *buffer, int transfer_len, struct devrequest *cmd)
988 void * data = buffer;
989 int leni = transfer_len;
993 __u8 *data_buf = (__u8 *)datab;
1000 urb_priv.actual_length = 0;
1001 pkt_print(dev, pipe, buffer, transfer_len, cmd, "SUB(rh)", usb_pipein(pipe));
1005 if ((pipe & PIPE_INTERRUPT) == PIPE_INTERRUPT) {
1006 info("Root-Hub submit IRQ: NOT implemented");
1010 bmRType_bReq = cmd->requesttype | (cmd->request << 8);
1011 wValue = m16_swap (cmd->value);
1012 wIndex = m16_swap (cmd->index);
1013 wLength = m16_swap (cmd->length);
1015 info("Root-Hub: adr: %2x cmd(%1x): %08x %04x %04x %04x",
1016 dev->devnum, 8, bmRType_bReq, wValue, wIndex, wLength);
1018 switch (bmRType_bReq) {
1019 /* Request Destination:
1020 without flags: Device,
1021 RH_INTERFACE: interface,
1022 RH_ENDPOINT: endpoint,
1023 RH_CLASS means HUB here,
1024 RH_OTHER | RH_CLASS almost ever means HUB_PORT here
1028 *(__u16 *) data_buf = m16_swap (1); OK (2);
1029 case RH_GET_STATUS | RH_INTERFACE:
1030 *(__u16 *) data_buf = m16_swap (0); OK (2);
1031 case RH_GET_STATUS | RH_ENDPOINT:
1032 *(__u16 *) data_buf = m16_swap (0); OK (2);
1033 case RH_GET_STATUS | RH_CLASS:
1034 *(__u32 *) data_buf = m32_swap (
1035 RD_RH_STAT & ~(RH_HS_CRWE | RH_HS_DRWE));
1037 case RH_GET_STATUS | RH_OTHER | RH_CLASS:
1038 *(__u32 *) data_buf = m32_swap (RD_RH_PORTSTAT); OK (4);
1040 case RH_CLEAR_FEATURE | RH_ENDPOINT:
1042 case (RH_ENDPOINT_STALL): OK (0);
1046 case RH_CLEAR_FEATURE | RH_CLASS:
1048 case RH_C_HUB_LOCAL_POWER:
1050 case (RH_C_HUB_OVER_CURRENT):
1051 WR_RH_STAT(RH_HS_OCIC); OK (0);
1055 case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
1057 case (RH_PORT_ENABLE):
1058 WR_RH_PORTSTAT (RH_PS_CCS ); OK (0);
1059 case (RH_PORT_SUSPEND):
1060 WR_RH_PORTSTAT (RH_PS_POCI); OK (0);
1061 case (RH_PORT_POWER):
1062 WR_RH_PORTSTAT (RH_PS_LSDA); OK (0);
1063 case (RH_C_PORT_CONNECTION):
1064 WR_RH_PORTSTAT (RH_PS_CSC ); OK (0);
1065 case (RH_C_PORT_ENABLE):
1066 WR_RH_PORTSTAT (RH_PS_PESC); OK (0);
1067 case (RH_C_PORT_SUSPEND):
1068 WR_RH_PORTSTAT (RH_PS_PSSC); OK (0);
1069 case (RH_C_PORT_OVER_CURRENT):
1070 WR_RH_PORTSTAT (RH_PS_OCIC); OK (0);
1071 case (RH_C_PORT_RESET):
1072 WR_RH_PORTSTAT (RH_PS_PRSC); OK (0);
1076 case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
1078 case (RH_PORT_SUSPEND):
1079 WR_RH_PORTSTAT (RH_PS_PSS ); OK (0);
1080 case (RH_PORT_RESET): /* BUG IN HUP CODE *********/
1081 if (RD_RH_PORTSTAT & RH_PS_CCS)
1082 WR_RH_PORTSTAT (RH_PS_PRS);
1084 case (RH_PORT_POWER):
1085 WR_RH_PORTSTAT (RH_PS_PPS ); OK (0);
1086 case (RH_PORT_ENABLE): /* BUG IN HUP CODE *********/
1087 if (RD_RH_PORTSTAT & RH_PS_CCS)
1088 WR_RH_PORTSTAT (RH_PS_PES );
1093 case RH_SET_ADDRESS: gohci.rh.devnum = wValue; OK(0);
1095 case RH_GET_DESCRIPTOR:
1096 switch ((wValue & 0xff00) >> 8) {
1097 case (0x01): /* device descriptor */
1098 len = min_t(unsigned int,
1101 sizeof (root_hub_dev_des),
1103 data_buf = root_hub_dev_des; OK(len);
1104 case (0x02): /* configuration descriptor */
1105 len = min_t(unsigned int,
1108 sizeof (root_hub_config_des),
1110 data_buf = root_hub_config_des; OK(len);
1111 case (0x03): /* string descriptors */
1112 if(wValue==0x0300) {
1113 len = min_t(unsigned int,
1116 sizeof (root_hub_str_index0),
1118 data_buf = root_hub_str_index0;
1121 if(wValue==0x0301) {
1122 len = min_t(unsigned int,
1125 sizeof (root_hub_str_index1),
1127 data_buf = root_hub_str_index1;
1131 stat = USB_ST_STALLED;
1135 case RH_GET_DESCRIPTOR | RH_CLASS:
1137 __u32 temp = roothub_a (&gohci);
1139 data_buf [0] = 9; /* min length; */
1140 data_buf [1] = 0x29;
1141 data_buf [2] = temp & RH_A_NDP;
1143 if (temp & RH_A_PSM) /* per-port power switching? */
1144 data_buf [3] |= 0x1;
1145 if (temp & RH_A_NOCP) /* no overcurrent reporting? */
1146 data_buf [3] |= 0x10;
1147 else if (temp & RH_A_OCPM) /* per-port overcurrent reporting? */
1148 data_buf [3] |= 0x8;
1150 /* corresponds to data_buf[4-7] */
1152 data_buf [5] = (temp & RH_A_POTPGT) >> 24;
1153 temp = roothub_b (&gohci);
1154 data_buf [7] = temp & RH_B_DR;
1155 if (data_buf [2] < 7) {
1156 data_buf [8] = 0xff;
1159 data_buf [8] = (temp & RH_B_DR) >> 8;
1160 data_buf [10] = data_buf [9] = 0xff;
1163 len = min_t(unsigned int, leni,
1164 min_t(unsigned int, data_buf [0], wLength));
1168 case RH_GET_CONFIGURATION: *(__u8 *) data_buf = 0x01; OK (1);
1170 case RH_SET_CONFIGURATION: WR_RH_STAT (0x10000); OK (0);
1173 dbg ("unsupported root hub command");
1174 stat = USB_ST_STALLED;
1178 ohci_dump_roothub (&gohci, 1);
1183 len = min_t(int, len, leni);
1184 if (data != data_buf)
1185 memcpy (data, data_buf, len);
1191 urb_priv.actual_length = transfer_len;
1192 pkt_print(dev, pipe, buffer, transfer_len, cmd, "RET(rh)", 0/*usb_pipein(pipe)*/);
1200 /*-------------------------------------------------------------------------*/
1202 /* common code for handling submit messages - used for all but root hub */
1204 int submit_common_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1205 int transfer_len, struct devrequest *setup, int interval)
1208 int maxsize = usb_maxpacket(dev, pipe);
1211 /* device pulled? Shortcut the action. */
1212 if (devgone == dev) {
1213 dev->status = USB_ST_CRC_ERR;
1218 urb_priv.actual_length = 0;
1219 pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB", usb_pipein(pipe));
1224 err("submit_common_message: pipesize for pipe %lx is zero",
1229 if (sohci_submit_job(dev, pipe, buffer, transfer_len, setup, interval) < 0) {
1230 err("sohci_submit_job failed");
1235 /* ohci_dump_status(&gohci); */
1237 /* allow more time for a BULK device to react - some are slow */
1238 #define BULK_TO 5000 /* timeout in milliseconds */
1239 if (usb_pipetype (pipe) == PIPE_BULK)
1244 /* wait for it to complete */
1246 /* check whether the controller is done */
1247 stat = hc_interrupt();
1249 stat = USB_ST_CRC_ERR;
1252 if (stat >= 0 && stat != 0xff) {
1253 /* 0xff is returned for an SF-interrupt */
1259 err("CTL:TIMEOUT ");
1260 stat = USB_ST_CRC_ERR;
1264 /* we got an Root Hub Status Change interrupt */
1267 ohci_dump_roothub (&gohci, 1);
1271 timeout = rh_check_port_status(&gohci);
1273 #if 0 /* this does nothing useful, but leave it here in case that changes */
1274 /* the called routine adds 1 to the passed value */
1275 usb_hub_port_connect_change(gohci.rh.dev, timeout - 1);
1279 * This is potentially dangerous because it assumes
1280 * that only one device is ever plugged in!
1287 dev->act_len = transfer_len;
1290 pkt_print(dev, pipe, buffer, transfer_len, setup, "RET(ctlr)", usb_pipein(pipe));
1295 /* free TDs in urb_priv */
1296 urb_free_priv (&urb_priv);
1300 /* submit routines called from usb.c */
1301 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1304 info("submit_bulk_msg");
1305 return submit_common_msg(dev, pipe, buffer, transfer_len, NULL, 0);
1308 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1309 int transfer_len, struct devrequest *setup)
1311 int maxsize = usb_maxpacket(dev, pipe);
1313 info("submit_control_msg");
1315 urb_priv.actual_length = 0;
1316 pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB", usb_pipein(pipe));
1321 err("submit_control_message: pipesize for pipe %lx is zero",
1325 if (((pipe >> 8) & 0x7f) == gohci.rh.devnum) {
1327 /* root hub - redirect */
1328 return ohci_submit_rh_msg(dev, pipe, buffer, transfer_len,
1332 return submit_common_msg(dev, pipe, buffer, transfer_len, setup, 0);
1335 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1336 int transfer_len, int interval)
1338 info("submit_int_msg");
1342 /*-------------------------------------------------------------------------*
1344 *-------------------------------------------------------------------------*/
1346 /* reset the HC and BUS */
1348 static int hc_reset (ohci_t *ohci)
1351 int smm_timeout = 50; /* 0,5 sec */
1353 if (readl (&ohci->regs->control) & OHCI_CTRL_IR) { /* SMM owns the HC */
1354 writel (OHCI_OCR, &ohci->regs->cmdstatus); /* request ownership */
1355 info("USB HC TakeOver from SMM");
1356 while (readl (&ohci->regs->control) & OHCI_CTRL_IR) {
1358 if (--smm_timeout == 0) {
1359 err("USB HC TakeOver failed!");
1365 /* Disable HC interrupts */
1366 writel (OHCI_INTR_MIE, &ohci->regs->intrdisable);
1368 dbg("USB HC reset_hc usb-%s: ctrl = 0x%X ;",
1370 readl (&ohci->regs->control));
1372 /* Reset USB (needed by some controllers) */
1373 writel (0, &ohci->regs->control);
1375 /* HC Reset requires max 10 us delay */
1376 writel (OHCI_HCR, &ohci->regs->cmdstatus);
1377 while ((readl (&ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
1378 if (--timeout == 0) {
1379 err("USB HC reset timed out!");
1387 /*-------------------------------------------------------------------------*/
1389 /* Start an OHCI controller, set the BUS operational
1391 * connect the virtual root hub */
1393 static int hc_start (ohci_t * ohci)
1396 unsigned int fminterval;
1400 /* Tell the controller where the control and bulk lists are
1401 * The lists are empty now. */
1403 writel (0, &ohci->regs->ed_controlhead);
1404 writel (0, &ohci->regs->ed_bulkhead);
1406 writel ((__u32)ohci->hcca, &ohci->regs->hcca); /* a reset clears this */
1408 fminterval = 0x2edf;
1409 writel ((fminterval * 9) / 10, &ohci->regs->periodicstart);
1410 fminterval |= ((((fminterval - 210) * 6) / 7) << 16);
1411 writel (fminterval, &ohci->regs->fminterval);
1412 writel (0x628, &ohci->regs->lsthresh);
1414 /* start controller operations */
1415 ohci->hc_control = OHCI_CONTROL_INIT | OHCI_USB_OPER;
1417 writel (ohci->hc_control, &ohci->regs->control);
1419 /* disable all interrupts */
1420 mask = (OHCI_INTR_SO | OHCI_INTR_WDH | OHCI_INTR_SF | OHCI_INTR_RD |
1421 OHCI_INTR_UE | OHCI_INTR_FNO | OHCI_INTR_RHSC |
1422 OHCI_INTR_OC | OHCI_INTR_MIE);
1423 writel (mask, &ohci->regs->intrdisable);
1424 /* clear all interrupts */
1425 mask &= ~OHCI_INTR_MIE;
1426 writel (mask, &ohci->regs->intrstatus);
1427 /* Choose the interrupts we care about now - but w/o MIE */
1428 mask = OHCI_INTR_RHSC | OHCI_INTR_UE | OHCI_INTR_WDH | OHCI_INTR_SO;
1429 writel (mask, &ohci->regs->intrenable);
1432 /* required for AMD-756 and some Mac platforms */
1433 writel ((roothub_a (ohci) | RH_A_NPS) & ~RH_A_PSM,
1434 &ohci->regs->roothub.a);
1435 writel (RH_HS_LPSC, &ohci->regs->roothub.status);
1436 #endif /* OHCI_USE_NPS */
1438 #define mdelay(n) ({unsigned long msec=(n); while (msec--) udelay(1000);})
1439 /* POTPGT delay is bits 24-31, in 2 ms units. */
1440 mdelay ((roothub_a (ohci) >> 23) & 0x1fe);
1442 /* connect the virtual root hub */
1443 ohci->rh.devnum = 0;
1448 /*-------------------------------------------------------------------------*/
1450 /* an interrupt happens */
1455 ohci_t *ohci = &gohci;
1456 struct ohci_regs *regs = ohci->regs;
1460 if ((ohci->hcca->done_head != 0) && !(m32_swap (ohci->hcca->done_head) & 0x01)) {
1461 ints = OHCI_INTR_WDH;
1463 ints = readl (®s->intrstatus);
1466 /* dbg("Interrupt: %x frame: %x", ints, le16_to_cpu (ohci->hcca->frame_no)); */
1468 if (ints & OHCI_INTR_RHSC) {
1472 if (ints & OHCI_INTR_UE) {
1474 err ("OHCI Unrecoverable Error, controller usb-%s disabled",
1476 /* e.g. due to PCI Master/Target Abort */
1479 ohci_dump (ohci, 1);
1483 /* FIXME: be optimistic, hope that bug won't repeat often. */
1484 /* Make some non-interrupt context restart the controller. */
1485 /* Count and limit the retries though; either hardware or */
1486 /* software errors can go forever... */
1491 if (ints & OHCI_INTR_WDH) {
1493 writel (OHCI_INTR_WDH, ®s->intrdisable);
1494 stat = dl_done_list (&gohci, dl_reverse_done_list (&gohci));
1495 writel (OHCI_INTR_WDH, ®s->intrenable);
1498 if (ints & OHCI_INTR_SO) {
1499 dbg("USB Schedule overrun\n");
1500 writel (OHCI_INTR_SO, ®s->intrenable);
1504 /* FIXME: this assumes SOF (1/ms) interrupts don't get lost... */
1505 if (ints & OHCI_INTR_SF) {
1506 unsigned int frame = m16_swap (ohci->hcca->frame_no) & 1;
1508 writel (OHCI_INTR_SF, ®s->intrdisable);
1509 if (ohci->ed_rm_list[frame] != NULL)
1510 writel (OHCI_INTR_SF, ®s->intrenable);
1514 writel (ints, ®s->intrstatus);
1518 /*-------------------------------------------------------------------------*/
1520 /*-------------------------------------------------------------------------*/
1522 /* De-allocate all resources.. */
1524 static void hc_release_ohci (ohci_t *ohci)
1526 dbg ("USB HC release ohci usb-%s", ohci->slot_name);
1528 if (!ohci->disabled)
1532 /*-------------------------------------------------------------------------*/
1535 * low level initalisation routine, called from usb.c
1537 static char ohci_inited = 0;
1539 int usb_lowlevel_init(void)
1541 S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();
1542 S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO();
1545 * Set the 48 MHz UPLL clocking. Values are taken from
1546 * "PLL value selection guide", 6-23, s3c2400_UM.pdf.
1548 clk_power->UPLLCON = ((40 << 12) + (1 << 4) + 2);
1549 gpio->MISCCR |= 0x8; /* 1 = use pads related USB for USB host */
1552 * Enable USB host clock.
1554 clk_power->CLKCON |= (1 << 4);
1556 memset (&gohci, 0, sizeof (ohci_t));
1557 memset (&urb_priv, 0, sizeof (urb_priv_t));
1559 /* align the storage */
1560 if ((__u32)&ghcca[0] & 0xff) {
1561 err("HCCA not aligned!!");
1565 info("aligned ghcca %p", phcca);
1566 memset(&ohci_dev, 0, sizeof(struct ohci_device));
1567 if ((__u32)&ohci_dev.ed[0] & 0x7) {
1568 err("EDs not aligned!!");
1571 memset(gtd, 0, sizeof(td_t) * (NUM_TD + 1));
1572 if ((__u32)gtd & 0x7) {
1573 err("TDs not aligned!!");
1578 memset (phcca, 0, sizeof (struct ohci_hcca));
1583 gohci.regs = (struct ohci_regs *)S3C24X0_USB_HOST_BASE;
1586 gohci.slot_name = "s3c2400";
1588 if (hc_reset (&gohci) < 0) {
1589 hc_release_ohci (&gohci);
1590 /* Initialization failed */
1591 clk_power->CLKCON &= ~(1 << 4);
1595 /* FIXME this is a second HC reset; why?? */
1596 writel (gohci.hc_control = OHCI_USB_RESET, &gohci.regs->control);
1599 if (hc_start (&gohci) < 0) {
1600 err ("can't start usb-%s", gohci.slot_name);
1601 hc_release_ohci (&gohci);
1602 /* Initialization failed */
1603 clk_power->CLKCON &= ~(1 << 4);
1608 ohci_dump (&gohci, 1);
1616 int usb_lowlevel_stop(void)
1618 S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();
1620 /* this gets called really early - before the controller has */
1621 /* even been initialized! */
1624 /* TODO release any interrupts, etc. */
1625 /* call hc_release_ohci() here ? */
1627 /* may not want to do this */
1628 clk_power->CLKCON &= ~(1 << 4);
1632 #endif /* CONFIG_USB_OHCI */