2 * URB OHCI HCD (Host Controller Driver) for USB on the S3C2400.
5 * Gary Jennejohn, DENX Software Engineering <gj@denx.de>
7 * See file CREDITS for list of people who contributed to this
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
25 * Note: Part of this code has been derived from linux
30 * 1 - you MUST define LITTLEENDIAN in the configuration file for the
31 * board or this driver will NOT work!
32 * 2 - 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) (*((vu_long *)(a)))
60 #define writel(a, b) (*((vu_long *)(b)) = ((vu_long)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;
96 /*-------------------------------------------------------------------------*/
98 /* AMD-756 (D2 rev) reports corrupt register contents in some cases.
99 * The erratum (#4) description is incorrect. AMD's workaround waits
100 * till some bits (mostly reserved) are clear; ok for all revs.
102 #define OHCI_QUIRK_AMD756 0xabcd
103 #define read_roothub(hc, register, mask) ({ \
104 u32 temp = readl (&hc->regs->roothub.register); \
105 if (hc->flags & OHCI_QUIRK_AMD756) \
106 while (temp & mask) \
107 temp = readl (&hc->regs->roothub.register); \
110 static u32 roothub_a (struct ohci *hc)
111 { return read_roothub (hc, a, 0xfc0fe000); }
112 static inline u32 roothub_b (struct ohci *hc)
113 { return readl (&hc->regs->roothub.b); }
114 static inline u32 roothub_status (struct ohci *hc)
115 { return readl (&hc->regs->roothub.status); }
116 static u32 roothub_portstatus (struct ohci *hc, int i)
117 { return read_roothub (hc, portstatus [i], 0xffe0fce0); }
120 /* forward declaration */
121 static int hc_interrupt (void);
123 td_submit_job (struct usb_device * dev, unsigned long pipe, void * buffer,
124 int transfer_len, struct devrequest * setup, urb_priv_t * urb, int interval);
126 /*-------------------------------------------------------------------------*
127 * URB support functions
128 *-------------------------------------------------------------------------*/
130 /* free HCD-private data associated with this URB */
132 static void urb_free_priv (urb_priv_t * urb)
138 last = urb->length - 1;
140 for (i = 0; i <= last; i++) {
150 /*-------------------------------------------------------------------------*/
153 static int sohci_get_current_frame_number (struct usb_device * dev);
155 /* debug| print the main components of an URB
156 * small: 0) header + data packets 1) just header */
158 static void pkt_print (struct usb_device * dev, unsigned long pipe, void * buffer,
159 int transfer_len, struct devrequest * setup, char * str, int small)
161 urb_priv_t * purb = &urb_priv;
163 dbg("%s URB:[%4x] dev:%2d,ep:%2d-%c,type:%s,len:%d/%d stat:%#lx",
165 sohci_get_current_frame_number (dev),
166 usb_pipedevice (pipe),
167 usb_pipeendpoint (pipe),
168 usb_pipeout (pipe)? 'O': 'I',
169 usb_pipetype (pipe) < 2? (usb_pipeint (pipe)? "INTR": "ISOC"):
170 (usb_pipecontrol (pipe)? "CTRL": "BULK"),
172 transfer_len, dev->status);
173 #ifdef OHCI_VERBOSE_DEBUG
177 if (usb_pipecontrol (pipe)) {
178 printf (__FILE__ ": cmd(8):");
179 for (i = 0; i < 8 ; i++)
180 printf (" %02x", ((__u8 *) setup) [i]);
183 if (transfer_len > 0 && buffer) {
184 printf (__FILE__ ": data(%d/%d):",
187 len = usb_pipeout (pipe)?
188 transfer_len: purb->actual_length;
189 for (i = 0; i < 16 && i < len; i++)
190 printf (" %02x", ((__u8 *) buffer) [i]);
191 printf ("%s\n", i < len? "...": "");
197 /* just for debugging; prints non-empty branches of the int ed tree inclusive iso eds*/
198 void ep_print_int_eds (ohci_t *ohci, char * str) {
201 for (i= 0; i < 32; i++) {
203 ed_p = &(ohci->hcca->int_table [i]);
206 printf (__FILE__ ": %s branch int %2d(%2x):", str, i, i);
207 while (*ed_p != 0 && j--) {
208 ed_t *ed = (ed_t *)m32_swap(ed_p);
209 printf (" ed: %4x;", ed->hwINFO);
210 ed_p = &ed->hwNextED;
216 static void ohci_dump_intr_mask (char *label, __u32 mask)
218 dbg ("%s: 0x%08x%s%s%s%s%s%s%s%s%s",
221 (mask & OHCI_INTR_MIE) ? " MIE" : "",
222 (mask & OHCI_INTR_OC) ? " OC" : "",
223 (mask & OHCI_INTR_RHSC) ? " RHSC" : "",
224 (mask & OHCI_INTR_FNO) ? " FNO" : "",
225 (mask & OHCI_INTR_UE) ? " UE" : "",
226 (mask & OHCI_INTR_RD) ? " RD" : "",
227 (mask & OHCI_INTR_SF) ? " SF" : "",
228 (mask & OHCI_INTR_WDH) ? " WDH" : "",
229 (mask & OHCI_INTR_SO) ? " SO" : ""
233 static void maybe_print_eds (char *label, __u32 value)
235 ed_t *edp = (ed_t *)value;
238 dbg ("%s %08x", label, value);
239 dbg ("%08x", edp->hwINFO);
240 dbg ("%08x", edp->hwTailP);
241 dbg ("%08x", edp->hwHeadP);
242 dbg ("%08x", edp->hwNextED);
246 static char * hcfs2string (int state)
249 case OHCI_USB_RESET: return "reset";
250 case OHCI_USB_RESUME: return "resume";
251 case OHCI_USB_OPER: return "operational";
252 case OHCI_USB_SUSPEND: return "suspend";
257 /* dump control and status registers */
258 static void ohci_dump_status (ohci_t *controller)
260 struct ohci_regs *regs = controller->regs;
263 temp = readl (®s->revision) & 0xff;
265 dbg ("spec %d.%d", (temp >> 4), (temp & 0x0f));
267 temp = readl (®s->control);
268 dbg ("control: 0x%08x%s%s%s HCFS=%s%s%s%s%s CBSR=%d", temp,
269 (temp & OHCI_CTRL_RWE) ? " RWE" : "",
270 (temp & OHCI_CTRL_RWC) ? " RWC" : "",
271 (temp & OHCI_CTRL_IR) ? " IR" : "",
272 hcfs2string (temp & OHCI_CTRL_HCFS),
273 (temp & OHCI_CTRL_BLE) ? " BLE" : "",
274 (temp & OHCI_CTRL_CLE) ? " CLE" : "",
275 (temp & OHCI_CTRL_IE) ? " IE" : "",
276 (temp & OHCI_CTRL_PLE) ? " PLE" : "",
277 temp & OHCI_CTRL_CBSR
280 temp = readl (®s->cmdstatus);
281 dbg ("cmdstatus: 0x%08x SOC=%d%s%s%s%s", temp,
282 (temp & OHCI_SOC) >> 16,
283 (temp & OHCI_OCR) ? " OCR" : "",
284 (temp & OHCI_BLF) ? " BLF" : "",
285 (temp & OHCI_CLF) ? " CLF" : "",
286 (temp & OHCI_HCR) ? " HCR" : ""
289 ohci_dump_intr_mask ("intrstatus", readl (®s->intrstatus));
290 ohci_dump_intr_mask ("intrenable", readl (®s->intrenable));
292 maybe_print_eds ("ed_periodcurrent", readl (®s->ed_periodcurrent));
294 maybe_print_eds ("ed_controlhead", readl (®s->ed_controlhead));
295 maybe_print_eds ("ed_controlcurrent", readl (®s->ed_controlcurrent));
297 maybe_print_eds ("ed_bulkhead", readl (®s->ed_bulkhead));
298 maybe_print_eds ("ed_bulkcurrent", readl (®s->ed_bulkcurrent));
300 maybe_print_eds ("donehead", readl (®s->donehead));
303 static void ohci_dump_roothub (ohci_t *controller, int verbose)
307 temp = roothub_a (controller);
308 ndp = (temp & RH_A_NDP);
311 dbg ("roothub.a: %08x POTPGT=%d%s%s%s%s%s NDP=%d", temp,
312 ((temp & RH_A_POTPGT) >> 24) & 0xff,
313 (temp & RH_A_NOCP) ? " NOCP" : "",
314 (temp & RH_A_OCPM) ? " OCPM" : "",
315 (temp & RH_A_DT) ? " DT" : "",
316 (temp & RH_A_NPS) ? " NPS" : "",
317 (temp & RH_A_PSM) ? " PSM" : "",
320 temp = roothub_b (controller);
321 dbg ("roothub.b: %08x PPCM=%04x DR=%04x",
323 (temp & RH_B_PPCM) >> 16,
326 temp = roothub_status (controller);
327 dbg ("roothub.status: %08x%s%s%s%s%s%s",
329 (temp & RH_HS_CRWE) ? " CRWE" : "",
330 (temp & RH_HS_OCIC) ? " OCIC" : "",
331 (temp & RH_HS_LPSC) ? " LPSC" : "",
332 (temp & RH_HS_DRWE) ? " DRWE" : "",
333 (temp & RH_HS_OCI) ? " OCI" : "",
334 (temp & RH_HS_LPS) ? " LPS" : ""
338 for (i = 0; i < ndp; i++) {
339 temp = roothub_portstatus (controller, i);
340 dbg ("roothub.portstatus [%d] = 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s",
343 (temp & RH_PS_PRSC) ? " PRSC" : "",
344 (temp & RH_PS_OCIC) ? " OCIC" : "",
345 (temp & RH_PS_PSSC) ? " PSSC" : "",
346 (temp & RH_PS_PESC) ? " PESC" : "",
347 (temp & RH_PS_CSC) ? " CSC" : "",
349 (temp & RH_PS_LSDA) ? " LSDA" : "",
350 (temp & RH_PS_PPS) ? " PPS" : "",
351 (temp & RH_PS_PRS) ? " PRS" : "",
352 (temp & RH_PS_POCI) ? " POCI" : "",
353 (temp & RH_PS_PSS) ? " PSS" : "",
355 (temp & RH_PS_PES) ? " PES" : "",
356 (temp & RH_PS_CCS) ? " CCS" : ""
361 static void ohci_dump (ohci_t *controller, int verbose)
363 dbg ("OHCI controller usb-%s state", controller->slot_name);
365 /* dumps some of the state we know about */
366 ohci_dump_status (controller);
368 ep_print_int_eds (controller, "hcca");
369 dbg ("hcca frame #%04x", controller->hcca->frame_no);
370 ohci_dump_roothub (controller, 1);
376 /*-------------------------------------------------------------------------*
377 * Interface functions (URB)
378 *-------------------------------------------------------------------------*/
380 /* get a transfer request */
382 int sohci_submit_job(struct usb_device *dev, unsigned long pipe, void *buffer,
383 int transfer_len, struct devrequest *setup, int interval)
387 urb_priv_t *purb_priv;
392 /* when controller's hung, permit only roothub cleanup attempts
393 * such as powering down ports */
394 if (ohci->disabled) {
395 err("sohci_submit_job: EPIPE");
399 /* every endpoint has a ed, locate and fill it */
400 if (!(ed = ep_add_ed (dev, pipe))) {
401 err("sohci_submit_job: ENOMEM");
405 /* for the private part of the URB we need the number of TDs (size) */
406 switch (usb_pipetype (pipe)) {
407 case PIPE_BULK: /* one TD for every 4096 Byte */
408 size = (transfer_len - 1) / 4096 + 1;
410 case PIPE_CONTROL: /* 1 TD for setup, 1 for ACK and 1 for every 4096 B */
411 size = (transfer_len == 0)? 2:
412 (transfer_len - 1) / 4096 + 3;
416 if (size >= (N_URB_TD - 1)) {
417 err("need %d TDs, only have %d", size, N_URB_TD);
420 purb_priv = &urb_priv;
421 purb_priv->pipe = pipe;
423 /* fill the private part of the URB */
424 purb_priv->length = size;
426 purb_priv->actual_length = 0;
428 /* allocate the TDs */
429 /* note that td[0] was allocated in ep_add_ed */
430 for (i = 0; i < size; i++) {
431 purb_priv->td[i] = td_alloc (dev);
432 if (!purb_priv->td[i]) {
433 purb_priv->length = i;
434 urb_free_priv (purb_priv);
435 err("sohci_submit_job: ENOMEM");
440 if (ed->state == ED_NEW || (ed->state & ED_DEL)) {
441 urb_free_priv (purb_priv);
442 err("sohci_submit_job: EINVAL");
446 /* link the ed into a chain if is not already */
447 if (ed->state != ED_OPER)
450 /* fill the TDs and link it to the ed */
451 td_submit_job(dev, pipe, buffer, transfer_len, setup, purb_priv, interval);
456 /*-------------------------------------------------------------------------*/
459 /* tell us the current USB frame number */
461 static int sohci_get_current_frame_number (struct usb_device *usb_dev)
463 ohci_t *ohci = &gohci;
465 return m16_swap (ohci->hcca->frame_no);
469 /*-------------------------------------------------------------------------*
470 * ED handling functions
471 *-------------------------------------------------------------------------*/
473 /* link an ed into one of the HC chains */
475 static int ep_link (ohci_t *ohci, ed_t *edi)
477 volatile ed_t *ed = edi;
484 if (ohci->ed_controltail == NULL) {
485 writel (ed, &ohci->regs->ed_controlhead);
487 ohci->ed_controltail->hwNextED = m32_swap (ed);
489 ed->ed_prev = ohci->ed_controltail;
490 if (!ohci->ed_controltail && !ohci->ed_rm_list[0] &&
491 !ohci->ed_rm_list[1] && !ohci->sleeping) {
492 ohci->hc_control |= OHCI_CTRL_CLE;
493 writel (ohci->hc_control, &ohci->regs->control);
495 ohci->ed_controltail = edi;
500 if (ohci->ed_bulktail == NULL) {
501 writel (ed, &ohci->regs->ed_bulkhead);
503 ohci->ed_bulktail->hwNextED = m32_swap (ed);
505 ed->ed_prev = ohci->ed_bulktail;
506 if (!ohci->ed_bulktail && !ohci->ed_rm_list[0] &&
507 !ohci->ed_rm_list[1] && !ohci->sleeping) {
508 ohci->hc_control |= OHCI_CTRL_BLE;
509 writel (ohci->hc_control, &ohci->regs->control);
511 ohci->ed_bulktail = edi;
517 /*-------------------------------------------------------------------------*/
519 /* unlink an ed from one of the HC chains.
520 * just the link to the ed is unlinked.
521 * the link from the ed still points to another operational ed or 0
522 * so the HC can eventually finish the processing of the unlinked ed */
524 static int ep_unlink (ohci_t *ohci, ed_t *ed)
526 ed->hwINFO |= m32_swap (OHCI_ED_SKIP);
530 if (ed->ed_prev == NULL) {
532 ohci->hc_control &= ~OHCI_CTRL_CLE;
533 writel (ohci->hc_control, &ohci->regs->control);
535 writel (m32_swap (*((__u32 *)&ed->hwNextED)), &ohci->regs->ed_controlhead);
537 ed->ed_prev->hwNextED = ed->hwNextED;
539 if (ohci->ed_controltail == ed) {
540 ohci->ed_controltail = ed->ed_prev;
542 ((ed_t *)m32_swap (*((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;
547 if (ed->ed_prev == NULL) {
549 ohci->hc_control &= ~OHCI_CTRL_BLE;
550 writel (ohci->hc_control, &ohci->regs->control);
552 writel (m32_swap (*((__u32 *)&ed->hwNextED)), &ohci->regs->ed_bulkhead);
554 ed->ed_prev->hwNextED = ed->hwNextED;
556 if (ohci->ed_bulktail == ed) {
557 ohci->ed_bulktail = ed->ed_prev;
559 ((ed_t *)m32_swap (*((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;
563 ed->state = ED_UNLINK;
568 /*-------------------------------------------------------------------------*/
570 /* add/reinit an endpoint; this should be done once at the usb_set_configuration command,
571 * but the USB stack is a little bit stateless so we do it at every transaction
572 * if the state of the ed is ED_NEW then a dummy td is added and the state is changed to ED_UNLINK
573 * in all other cases the state is left unchanged
574 * the ed info fields are setted anyway even though most of them should not change */
576 static ed_t * ep_add_ed (struct usb_device *usb_dev, unsigned long pipe)
582 ed = ed_ret = &ohci_dev.ed[(usb_pipeendpoint (pipe) << 1) |
583 (usb_pipecontrol (pipe)? 0: usb_pipeout (pipe))];
585 if ((ed->state & ED_DEL) || (ed->state & ED_URB_DEL)) {
586 err("ep_add_ed: pending delete");
587 /* pending delete request */
591 if (ed->state == ED_NEW) {
592 ed->hwINFO = m32_swap (OHCI_ED_SKIP); /* skip ed */
593 /* dummy td; end of td list for ed */
594 td = td_alloc (usb_dev);
595 ed->hwTailP = m32_swap (td);
596 ed->hwHeadP = ed->hwTailP;
597 ed->state = ED_UNLINK;
598 ed->type = usb_pipetype (pipe);
602 ed->hwINFO = m32_swap (usb_pipedevice (pipe)
603 | usb_pipeendpoint (pipe) << 7
604 | (usb_pipeisoc (pipe)? 0x8000: 0)
605 | (usb_pipecontrol (pipe)? 0: (usb_pipeout (pipe)? 0x800: 0x1000))
606 | usb_pipeslow (pipe) << 13
607 | usb_maxpacket (usb_dev, pipe) << 16);
612 /*-------------------------------------------------------------------------*
613 * TD handling functions
614 *-------------------------------------------------------------------------*/
616 /* enqueue next TD for this URB (OHCI spec 5.2.8.2) */
618 static void td_fill (ohci_t *ohci, unsigned int info,
620 struct usb_device *dev, int index, urb_priv_t *urb_priv)
622 volatile td_t *td, *td_pt;
623 #ifdef OHCI_FILL_TRACE
627 if (index > urb_priv->length) {
628 err("index > length");
631 /* use this td as the next dummy */
632 td_pt = urb_priv->td [index];
635 /* fill the old dummy TD */
636 td = urb_priv->td [index] = (td_t *)(m32_swap (urb_priv->ed->hwTailP) & ~0xf);
638 td->ed = urb_priv->ed;
639 td->next_dl_td = NULL;
641 td->data = (__u32)data;
642 #ifdef OHCI_FILL_TRACE
643 if ((usb_pipetype(urb_priv->pipe) == PIPE_BULK) && usb_pipeout(urb_priv->pipe)) {
644 for (i = 0; i < len; i++)
645 printf("td->data[%d] %#2x ",i, ((unsigned char *)td->data)[i]);
652 td->hwINFO = m32_swap (info);
653 td->hwCBP = m32_swap (data);
655 td->hwBE = m32_swap (data + len - 1);
658 td->hwNextTD = m32_swap (td_pt);
659 td->hwPSW [0] = m16_swap (((__u32)data & 0x0FFF) | 0xE000);
661 /* append to queue */
662 td->ed->hwTailP = td->hwNextTD;
665 /*-------------------------------------------------------------------------*/
667 /* prepare all TDs of a transfer */
669 static void td_submit_job (struct usb_device *dev, unsigned long pipe, void *buffer,
670 int transfer_len, struct devrequest *setup, urb_priv_t *urb, int interval)
672 ohci_t *ohci = &gohci;
673 int data_len = transfer_len;
677 unsigned int toggle = 0;
679 /* OHCI handles the DATA-toggles itself, we just use the USB-toggle bits for reseting */
680 if(usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe))) {
681 toggle = TD_T_TOGGLE;
684 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 1);
692 switch (usb_pipetype (pipe)) {
694 info = usb_pipeout (pipe)?
695 TD_CC | TD_DP_OUT : TD_CC | TD_DP_IN ;
696 while(data_len > 4096) {
697 td_fill (ohci, info | (cnt? TD_T_TOGGLE:toggle), data, 4096, dev, cnt, urb);
698 data += 4096; data_len -= 4096; cnt++;
700 info = usb_pipeout (pipe)?
701 TD_CC | TD_DP_OUT : TD_CC | TD_R | TD_DP_IN ;
702 td_fill (ohci, info | (cnt? TD_T_TOGGLE:toggle), data, data_len, dev, cnt, urb);
706 writel (OHCI_BLF, &ohci->regs->cmdstatus); /* start bulk list */
710 info = TD_CC | TD_DP_SETUP | TD_T_DATA0;
711 td_fill (ohci, info, setup, 8, dev, cnt++, urb);
713 info = usb_pipeout (pipe)?
714 TD_CC | TD_R | TD_DP_OUT | TD_T_DATA1 : TD_CC | TD_R | TD_DP_IN | TD_T_DATA1;
715 /* NOTE: mishandles transfers >8K, some >4K */
716 td_fill (ohci, info, data, data_len, dev, cnt++, urb);
718 info = usb_pipeout (pipe)?
719 TD_CC | TD_DP_IN | TD_T_DATA1: TD_CC | TD_DP_OUT | TD_T_DATA1;
720 td_fill (ohci, info, data, 0, dev, cnt++, urb);
722 writel (OHCI_CLF, &ohci->regs->cmdstatus); /* start Control list */
725 if (urb->length != cnt)
726 dbg("TD LENGTH %d != CNT %d", urb->length, cnt);
729 /*-------------------------------------------------------------------------*
730 * Done List handling functions
731 *-------------------------------------------------------------------------*/
734 /* calculate the transfer length and update the urb */
736 static void dl_transfer_length(td_t * td)
738 __u32 tdINFO, tdBE, tdCBP;
739 urb_priv_t *lurb_priv = &urb_priv;
741 tdINFO = m32_swap (td->hwINFO);
742 tdBE = m32_swap (td->hwBE);
743 tdCBP = m32_swap (td->hwCBP);
746 if (!(usb_pipetype (lurb_priv->pipe) == PIPE_CONTROL &&
747 ((td->index == 0) || (td->index == lurb_priv->length - 1)))) {
750 lurb_priv->actual_length += tdBE - td->data + 1;
752 lurb_priv->actual_length += tdCBP - td->data;
757 /*-------------------------------------------------------------------------*/
759 /* replies to the request have to be on a FIFO basis so
760 * we reverse the reversed done-list */
762 static td_t * dl_reverse_done_list (ohci_t *ohci)
766 td_t *td_list = NULL;
767 urb_priv_t *lurb_priv = NULL;
769 td_list_hc = m32_swap (ohci->hcca->done_head) & 0xfffffff0;
770 ohci->hcca->done_head = 0;
773 td_list = (td_t *)td_list_hc;
775 if (TD_CC_GET (m32_swap (td_list->hwINFO))) {
776 lurb_priv = &urb_priv;
777 dbg(" USB-error/status: %x : %p",
778 TD_CC_GET (m32_swap (td_list->hwINFO)), td_list);
779 if (td_list->ed->hwHeadP & m32_swap (0x1)) {
780 if (lurb_priv && ((td_list->index + 1) < lurb_priv->length)) {
781 td_list->ed->hwHeadP =
782 (lurb_priv->td[lurb_priv->length - 1]->hwNextTD & m32_swap (0xfffffff0)) |
783 (td_list->ed->hwHeadP & m32_swap (0x2));
784 lurb_priv->td_cnt += lurb_priv->length - td_list->index - 1;
786 td_list->ed->hwHeadP &= m32_swap (0xfffffff2);
790 td_list->next_dl_td = td_rev;
792 td_list_hc = m32_swap (td_list->hwNextTD) & 0xfffffff0;
797 /*-------------------------------------------------------------------------*/
800 static int dl_done_list (ohci_t *ohci, td_t *td_list)
802 td_t *td_list_next = NULL;
807 urb_priv_t *lurb_priv;
808 __u32 tdINFO, edHeadP, edTailP;
811 td_list_next = td_list->next_dl_td;
813 lurb_priv = &urb_priv;
814 tdINFO = m32_swap (td_list->hwINFO);
818 dl_transfer_length(td_list);
820 /* error code of transfer */
821 cc = TD_CC_GET (tdINFO);
823 dbg("ConditionCode %#x", cc);
824 stat = cc_to_error[cc];
827 if (ed->state != ED_NEW) {
828 edHeadP = m32_swap (ed->hwHeadP) & 0xfffffff0;
829 edTailP = m32_swap (ed->hwTailP);
831 /* unlink eds if they are not busy */
832 if ((edHeadP == edTailP) && (ed->state == ED_OPER))
833 ep_unlink (ohci, ed);
836 td_list = td_list_next;
841 /*-------------------------------------------------------------------------*
843 *-------------------------------------------------------------------------*/
845 /* Device descriptor */
846 static __u8 root_hub_dev_des[] =
848 0x12, /* __u8 bLength; */
849 0x01, /* __u8 bDescriptorType; Device */
850 0x10, /* __u16 bcdUSB; v1.1 */
852 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */
853 0x00, /* __u8 bDeviceSubClass; */
854 0x00, /* __u8 bDeviceProtocol; */
855 0x08, /* __u8 bMaxPacketSize0; 8 Bytes */
856 0x00, /* __u16 idVendor; */
858 0x00, /* __u16 idProduct; */
860 0x00, /* __u16 bcdDevice; */
862 0x00, /* __u8 iManufacturer; */
863 0x01, /* __u8 iProduct; */
864 0x00, /* __u8 iSerialNumber; */
865 0x01 /* __u8 bNumConfigurations; */
869 /* Configuration descriptor */
870 static __u8 root_hub_config_des[] =
872 0x09, /* __u8 bLength; */
873 0x02, /* __u8 bDescriptorType; Configuration */
874 0x19, /* __u16 wTotalLength; */
876 0x01, /* __u8 bNumInterfaces; */
877 0x01, /* __u8 bConfigurationValue; */
878 0x00, /* __u8 iConfiguration; */
879 0x40, /* __u8 bmAttributes;
880 Bit 7: Bus-powered, 6: Self-powered, 5 Remote-wakwup, 4..0: resvd */
881 0x00, /* __u8 MaxPower; */
884 0x09, /* __u8 if_bLength; */
885 0x04, /* __u8 if_bDescriptorType; Interface */
886 0x00, /* __u8 if_bInterfaceNumber; */
887 0x00, /* __u8 if_bAlternateSetting; */
888 0x01, /* __u8 if_bNumEndpoints; */
889 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */
890 0x00, /* __u8 if_bInterfaceSubClass; */
891 0x00, /* __u8 if_bInterfaceProtocol; */
892 0x00, /* __u8 if_iInterface; */
895 0x07, /* __u8 ep_bLength; */
896 0x05, /* __u8 ep_bDescriptorType; Endpoint */
897 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */
898 0x03, /* __u8 ep_bmAttributes; Interrupt */
899 0x02, /* __u16 ep_wMaxPacketSize; ((MAX_ROOT_PORTS + 1) / 8 */
901 0xff /* __u8 ep_bInterval; 255 ms */
904 static unsigned char root_hub_str_index0[] =
906 0x04, /* __u8 bLength; */
907 0x03, /* __u8 bDescriptorType; String-descriptor */
908 0x09, /* __u8 lang ID */
909 0x04, /* __u8 lang ID */
912 static unsigned char root_hub_str_index1[] =
914 28, /* __u8 bLength; */
915 0x03, /* __u8 bDescriptorType; String-descriptor */
916 'O', /* __u8 Unicode */
917 0, /* __u8 Unicode */
918 'H', /* __u8 Unicode */
919 0, /* __u8 Unicode */
920 'C', /* __u8 Unicode */
921 0, /* __u8 Unicode */
922 'I', /* __u8 Unicode */
923 0, /* __u8 Unicode */
924 ' ', /* __u8 Unicode */
925 0, /* __u8 Unicode */
926 'R', /* __u8 Unicode */
927 0, /* __u8 Unicode */
928 'o', /* __u8 Unicode */
929 0, /* __u8 Unicode */
930 'o', /* __u8 Unicode */
931 0, /* __u8 Unicode */
932 't', /* __u8 Unicode */
933 0, /* __u8 Unicode */
934 ' ', /* __u8 Unicode */
935 0, /* __u8 Unicode */
936 'H', /* __u8 Unicode */
937 0, /* __u8 Unicode */
938 'u', /* __u8 Unicode */
939 0, /* __u8 Unicode */
940 'b', /* __u8 Unicode */
941 0, /* __u8 Unicode */
944 /* Hub class-specific descriptor is constructed dynamically */
947 /*-------------------------------------------------------------------------*/
949 #define OK(x) len = (x); break
951 #define WR_RH_STAT(x) {info("WR:status %#8x", (x));writel((x), &gohci.regs->roothub.status);}
952 #define WR_RH_PORTSTAT(x) {info("WR:portstatus[%d] %#8x", wIndex-1, (x));writel((x), &gohci.regs->roothub.portstatus[wIndex-1]);}
954 #define WR_RH_STAT(x) writel((x), &gohci.regs->roothub.status)
955 #define WR_RH_PORTSTAT(x) writel((x), &gohci.regs->roothub.portstatus[wIndex-1])
957 #define RD_RH_STAT roothub_status(&gohci)
958 #define RD_RH_PORTSTAT roothub_portstatus(&gohci,wIndex-1)
960 /* request to virtual root hub */
962 int rh_check_port_status(ohci_t *controller)
968 temp = roothub_a (controller);
969 ndp = (temp & RH_A_NDP);
970 for (i = 0; i < ndp; i++) {
971 temp = roothub_portstatus (controller, i);
972 /* check for a device disconnect */
973 if (((temp & (RH_PS_PESC | RH_PS_CSC)) ==
974 (RH_PS_PESC | RH_PS_CSC)) &&
975 ((temp & RH_PS_CCS) == 0)) {
983 static int ohci_submit_rh_msg(struct usb_device *dev, unsigned long pipe,
984 void *buffer, int transfer_len, struct devrequest *cmd)
986 void * data = buffer;
987 int leni = transfer_len;
991 __u8 *data_buf = (__u8 *)datab;
998 urb_priv.actual_length = 0;
999 pkt_print(dev, pipe, buffer, transfer_len, cmd, "SUB(rh)", usb_pipein(pipe));
1003 if ((pipe & PIPE_INTERRUPT) == PIPE_INTERRUPT) {
1004 info("Root-Hub submit IRQ: NOT implemented");
1008 bmRType_bReq = cmd->requesttype | (cmd->request << 8);
1009 wValue = m16_swap (cmd->value);
1010 wIndex = m16_swap (cmd->index);
1011 wLength = m16_swap (cmd->length);
1013 info("Root-Hub: adr: %2x cmd(%1x): %08x %04x %04x %04x",
1014 dev->devnum, 8, bmRType_bReq, wValue, wIndex, wLength);
1016 switch (bmRType_bReq) {
1017 /* Request Destination:
1018 without flags: Device,
1019 RH_INTERFACE: interface,
1020 RH_ENDPOINT: endpoint,
1021 RH_CLASS means HUB here,
1022 RH_OTHER | RH_CLASS almost ever means HUB_PORT here
1026 *(__u16 *) data_buf = m16_swap (1); OK (2);
1027 case RH_GET_STATUS | RH_INTERFACE:
1028 *(__u16 *) data_buf = m16_swap (0); OK (2);
1029 case RH_GET_STATUS | RH_ENDPOINT:
1030 *(__u16 *) data_buf = m16_swap (0); OK (2);
1031 case RH_GET_STATUS | RH_CLASS:
1032 *(__u32 *) data_buf = m32_swap (
1033 RD_RH_STAT & ~(RH_HS_CRWE | RH_HS_DRWE));
1035 case RH_GET_STATUS | RH_OTHER | RH_CLASS:
1036 *(__u32 *) data_buf = m32_swap (RD_RH_PORTSTAT); OK (4);
1038 case RH_CLEAR_FEATURE | RH_ENDPOINT:
1040 case (RH_ENDPOINT_STALL): OK (0);
1044 case RH_CLEAR_FEATURE | RH_CLASS:
1046 case RH_C_HUB_LOCAL_POWER:
1048 case (RH_C_HUB_OVER_CURRENT):
1049 WR_RH_STAT(RH_HS_OCIC); OK (0);
1053 case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
1055 case (RH_PORT_ENABLE):
1056 WR_RH_PORTSTAT (RH_PS_CCS ); OK (0);
1057 case (RH_PORT_SUSPEND):
1058 WR_RH_PORTSTAT (RH_PS_POCI); OK (0);
1059 case (RH_PORT_POWER):
1060 WR_RH_PORTSTAT (RH_PS_LSDA); OK (0);
1061 case (RH_C_PORT_CONNECTION):
1062 WR_RH_PORTSTAT (RH_PS_CSC ); OK (0);
1063 case (RH_C_PORT_ENABLE):
1064 WR_RH_PORTSTAT (RH_PS_PESC); OK (0);
1065 case (RH_C_PORT_SUSPEND):
1066 WR_RH_PORTSTAT (RH_PS_PSSC); OK (0);
1067 case (RH_C_PORT_OVER_CURRENT):
1068 WR_RH_PORTSTAT (RH_PS_OCIC); OK (0);
1069 case (RH_C_PORT_RESET):
1070 WR_RH_PORTSTAT (RH_PS_PRSC); OK (0);
1074 case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
1076 case (RH_PORT_SUSPEND):
1077 WR_RH_PORTSTAT (RH_PS_PSS ); OK (0);
1078 case (RH_PORT_RESET): /* BUG IN HUP CODE *********/
1079 if (RD_RH_PORTSTAT & RH_PS_CCS)
1080 WR_RH_PORTSTAT (RH_PS_PRS);
1082 case (RH_PORT_POWER):
1083 WR_RH_PORTSTAT (RH_PS_PPS ); OK (0);
1084 case (RH_PORT_ENABLE): /* BUG IN HUP CODE *********/
1085 if (RD_RH_PORTSTAT & RH_PS_CCS)
1086 WR_RH_PORTSTAT (RH_PS_PES );
1091 case RH_SET_ADDRESS: gohci.rh.devnum = wValue; OK(0);
1093 case RH_GET_DESCRIPTOR:
1094 switch ((wValue & 0xff00) >> 8) {
1095 case (0x01): /* device descriptor */
1096 len = min_t(unsigned int,
1099 sizeof (root_hub_dev_des),
1101 data_buf = root_hub_dev_des; OK(len);
1102 case (0x02): /* configuration descriptor */
1103 len = min_t(unsigned int,
1106 sizeof (root_hub_config_des),
1108 data_buf = root_hub_config_des; OK(len);
1109 case (0x03): /* string descriptors */
1110 if(wValue==0x0300) {
1111 len = min_t(unsigned int,
1114 sizeof (root_hub_str_index0),
1116 data_buf = root_hub_str_index0;
1119 if(wValue==0x0301) {
1120 len = min_t(unsigned int,
1123 sizeof (root_hub_str_index1),
1125 data_buf = root_hub_str_index1;
1129 stat = USB_ST_STALLED;
1133 case RH_GET_DESCRIPTOR | RH_CLASS:
1135 __u32 temp = roothub_a (&gohci);
1137 data_buf [0] = 9; /* min length; */
1138 data_buf [1] = 0x29;
1139 data_buf [2] = temp & RH_A_NDP;
1141 if (temp & RH_A_PSM) /* per-port power switching? */
1142 data_buf [3] |= 0x1;
1143 if (temp & RH_A_NOCP) /* no overcurrent reporting? */
1144 data_buf [3] |= 0x10;
1145 else if (temp & RH_A_OCPM) /* per-port overcurrent reporting? */
1146 data_buf [3] |= 0x8;
1148 /* corresponds to data_buf[4-7] */
1150 data_buf [5] = (temp & RH_A_POTPGT) >> 24;
1151 temp = roothub_b (&gohci);
1152 data_buf [7] = temp & RH_B_DR;
1153 if (data_buf [2] < 7) {
1154 data_buf [8] = 0xff;
1157 data_buf [8] = (temp & RH_B_DR) >> 8;
1158 data_buf [10] = data_buf [9] = 0xff;
1161 len = min_t(unsigned int, leni,
1162 min_t(unsigned int, data_buf [0], wLength));
1166 case RH_GET_CONFIGURATION: *(__u8 *) data_buf = 0x01; OK (1);
1168 case RH_SET_CONFIGURATION: WR_RH_STAT (0x10000); OK (0);
1171 dbg ("unsupported root hub command");
1172 stat = USB_ST_STALLED;
1176 ohci_dump_roothub (&gohci, 1);
1181 len = min_t(int, len, leni);
1182 if (data != data_buf)
1183 memcpy (data, data_buf, len);
1189 urb_priv.actual_length = transfer_len;
1190 pkt_print(dev, pipe, buffer, transfer_len, cmd, "RET(rh)", 0/*usb_pipein(pipe)*/);
1198 /*-------------------------------------------------------------------------*/
1200 /* common code for handling submit messages - used for all but root hub */
1202 int submit_common_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1203 int transfer_len, struct devrequest *setup, int interval)
1206 int maxsize = usb_maxpacket(dev, pipe);
1209 /* device pulled? Shortcut the action. */
1210 if (devgone == dev) {
1211 dev->status = USB_ST_CRC_ERR;
1216 urb_priv.actual_length = 0;
1217 pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB", usb_pipein(pipe));
1222 err("submit_common_message: pipesize for pipe %lx is zero",
1227 if (sohci_submit_job(dev, pipe, buffer, transfer_len, setup, interval) < 0) {
1228 err("sohci_submit_job failed");
1233 /* ohci_dump_status(&gohci); */
1235 /* allow more time for a BULK device to react - some are slow */
1236 #define BULK_TO 5000 /* timeout in milliseconds */
1237 if (usb_pipetype (pipe) == PIPE_BULK)
1242 /* wait for it to complete */
1244 /* check whether the controller is done */
1245 stat = hc_interrupt();
1247 stat = USB_ST_CRC_ERR;
1250 if (stat >= 0 && stat != 0xff) {
1251 /* 0xff is returned for an SF-interrupt */
1257 err("CTL:TIMEOUT ");
1258 stat = USB_ST_CRC_ERR;
1262 /* we got an Root Hub Status Change interrupt */
1265 ohci_dump_roothub (&gohci, 1);
1269 timeout = rh_check_port_status(&gohci);
1271 #if 0 /* this does nothing useful, but leave it here in case that changes */
1272 /* the called routine adds 1 to the passed value */
1273 usb_hub_port_connect_change(gohci.rh.dev, timeout - 1);
1277 * This is potentially dangerous because it assumes
1278 * that only one device is ever plugged in!
1285 dev->act_len = transfer_len;
1288 pkt_print(dev, pipe, buffer, transfer_len, setup, "RET(ctlr)", usb_pipein(pipe));
1293 /* free TDs in urb_priv */
1294 urb_free_priv (&urb_priv);
1298 /* submit routines called from usb.c */
1299 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1302 info("submit_bulk_msg");
1303 return submit_common_msg(dev, pipe, buffer, transfer_len, NULL, 0);
1306 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1307 int transfer_len, struct devrequest *setup)
1309 int maxsize = usb_maxpacket(dev, pipe);
1311 info("submit_control_msg");
1313 urb_priv.actual_length = 0;
1314 pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB", usb_pipein(pipe));
1319 err("submit_control_message: pipesize for pipe %lx is zero",
1323 if (((pipe >> 8) & 0x7f) == gohci.rh.devnum) {
1325 /* root hub - redirect */
1326 return ohci_submit_rh_msg(dev, pipe, buffer, transfer_len,
1330 return submit_common_msg(dev, pipe, buffer, transfer_len, setup, 0);
1333 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1334 int transfer_len, int interval)
1336 info("submit_int_msg");
1340 /*-------------------------------------------------------------------------*
1342 *-------------------------------------------------------------------------*/
1344 /* reset the HC and BUS */
1346 static int hc_reset (ohci_t *ohci)
1349 int smm_timeout = 50; /* 0,5 sec */
1351 if (readl (&ohci->regs->control) & OHCI_CTRL_IR) { /* SMM owns the HC */
1352 writel (OHCI_OCR, &ohci->regs->cmdstatus); /* request ownership */
1353 info("USB HC TakeOver from SMM");
1354 while (readl (&ohci->regs->control) & OHCI_CTRL_IR) {
1356 if (--smm_timeout == 0) {
1357 err("USB HC TakeOver failed!");
1363 /* Disable HC interrupts */
1364 writel (OHCI_INTR_MIE, &ohci->regs->intrdisable);
1366 dbg("USB HC reset_hc usb-%s: ctrl = 0x%X ;",
1368 readl (&ohci->regs->control));
1370 /* Reset USB (needed by some controllers) */
1371 writel (0, &ohci->regs->control);
1373 /* HC Reset requires max 10 us delay */
1374 writel (OHCI_HCR, &ohci->regs->cmdstatus);
1375 while ((readl (&ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
1376 if (--timeout == 0) {
1377 err("USB HC reset timed out!");
1385 /*-------------------------------------------------------------------------*/
1387 /* Start an OHCI controller, set the BUS operational
1389 * connect the virtual root hub */
1391 static int hc_start (ohci_t * ohci)
1394 unsigned int fminterval;
1398 /* Tell the controller where the control and bulk lists are
1399 * The lists are empty now. */
1401 writel (0, &ohci->regs->ed_controlhead);
1402 writel (0, &ohci->regs->ed_bulkhead);
1404 writel ((__u32)ohci->hcca, &ohci->regs->hcca); /* a reset clears this */
1406 fminterval = 0x2edf;
1407 writel ((fminterval * 9) / 10, &ohci->regs->periodicstart);
1408 fminterval |= ((((fminterval - 210) * 6) / 7) << 16);
1409 writel (fminterval, &ohci->regs->fminterval);
1410 writel (0x628, &ohci->regs->lsthresh);
1412 /* start controller operations */
1413 ohci->hc_control = OHCI_CONTROL_INIT | OHCI_USB_OPER;
1415 writel (ohci->hc_control, &ohci->regs->control);
1417 /* disable all interrupts */
1418 mask = (OHCI_INTR_SO | OHCI_INTR_WDH | OHCI_INTR_SF | OHCI_INTR_RD |
1419 OHCI_INTR_UE | OHCI_INTR_FNO | OHCI_INTR_RHSC |
1420 OHCI_INTR_OC | OHCI_INTR_MIE);
1421 writel (mask, &ohci->regs->intrdisable);
1422 /* clear all interrupts */
1423 mask &= ~OHCI_INTR_MIE;
1424 writel (mask, &ohci->regs->intrstatus);
1425 /* Choose the interrupts we care about now - but w/o MIE */
1426 mask = OHCI_INTR_RHSC | OHCI_INTR_UE | OHCI_INTR_WDH | OHCI_INTR_SO;
1427 writel (mask, &ohci->regs->intrenable);
1430 /* required for AMD-756 and some Mac platforms */
1431 writel ((roothub_a (ohci) | RH_A_NPS) & ~RH_A_PSM,
1432 &ohci->regs->roothub.a);
1433 writel (RH_HS_LPSC, &ohci->regs->roothub.status);
1434 #endif /* OHCI_USE_NPS */
1436 #define mdelay(n) ({unsigned long msec=(n); while (msec--) udelay(1000);})
1437 /* POTPGT delay is bits 24-31, in 2 ms units. */
1438 mdelay ((roothub_a (ohci) >> 23) & 0x1fe);
1440 /* connect the virtual root hub */
1441 ohci->rh.devnum = 0;
1446 /*-------------------------------------------------------------------------*/
1448 /* an interrupt happens */
1453 ohci_t *ohci = &gohci;
1454 struct ohci_regs *regs = ohci->regs;
1458 if ((ohci->hcca->done_head != 0) && !(m32_swap (ohci->hcca->done_head) & 0x01)) {
1459 ints = OHCI_INTR_WDH;
1461 ints = readl (®s->intrstatus);
1464 /* dbg("Interrupt: %x frame: %x", ints, le16_to_cpu (ohci->hcca->frame_no)); */
1466 if (ints & OHCI_INTR_RHSC) {
1470 if (ints & OHCI_INTR_UE) {
1472 err ("OHCI Unrecoverable Error, controller usb-%s disabled",
1474 /* e.g. due to PCI Master/Target Abort */
1477 ohci_dump (ohci, 1);
1481 /* FIXME: be optimistic, hope that bug won't repeat often. */
1482 /* Make some non-interrupt context restart the controller. */
1483 /* Count and limit the retries though; either hardware or */
1484 /* software errors can go forever... */
1489 if (ints & OHCI_INTR_WDH) {
1491 writel (OHCI_INTR_WDH, ®s->intrdisable);
1492 stat = dl_done_list (&gohci, dl_reverse_done_list (&gohci));
1493 writel (OHCI_INTR_WDH, ®s->intrenable);
1496 if (ints & OHCI_INTR_SO) {
1497 dbg("USB Schedule overrun\n");
1498 writel (OHCI_INTR_SO, ®s->intrenable);
1502 /* FIXME: this assumes SOF (1/ms) interrupts don't get lost... */
1503 if (ints & OHCI_INTR_SF) {
1504 unsigned int frame = m16_swap (ohci->hcca->frame_no) & 1;
1506 writel (OHCI_INTR_SF, ®s->intrdisable);
1507 if (ohci->ed_rm_list[frame] != NULL)
1508 writel (OHCI_INTR_SF, ®s->intrenable);
1512 writel (ints, ®s->intrstatus);
1516 /*-------------------------------------------------------------------------*/
1518 /*-------------------------------------------------------------------------*/
1520 /* De-allocate all resources.. */
1522 static void hc_release_ohci (ohci_t *ohci)
1524 dbg ("USB HC release ohci usb-%s", ohci->slot_name);
1526 if (!ohci->disabled)
1530 /*-------------------------------------------------------------------------*/
1533 * low level initalisation routine, called from usb.c
1535 static char ohci_inited = 0;
1537 int usb_lowlevel_init(void)
1539 S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();
1540 S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO();
1543 * Set the 48 MHz UPLL clocking. Values are taken from
1544 * "PLL value selection guide", 6-23, s3c2400_UM.pdf.
1546 clk_power->UPLLCON = ((40 << 12) + (1 << 4) + 2);
1547 gpio->MISCCR |= 0x8; /* 1 = use pads related USB for USB host */
1550 * Enable USB host clock.
1552 clk_power->CLKCON |= (1 << 4);
1554 memset (&gohci, 0, sizeof (ohci_t));
1555 memset (&urb_priv, 0, sizeof (urb_priv_t));
1557 /* align the storage */
1558 if ((__u32)&ghcca[0] & 0xff) {
1559 err("HCCA not aligned!!");
1563 info("aligned ghcca %p", phcca);
1564 memset(&ohci_dev, 0, sizeof(struct ohci_device));
1565 if ((__u32)&ohci_dev.ed[0] & 0x7) {
1566 err("EDs not aligned!!");
1569 memset(gtd, 0, sizeof(td_t) * (NUM_TD + 1));
1570 if ((__u32)gtd & 0x7) {
1571 err("TDs not aligned!!");
1576 memset (phcca, 0, sizeof (struct ohci_hcca));
1581 gohci.regs = (struct ohci_regs *)S3C24X0_USB_HOST_BASE;
1584 gohci.slot_name = "s3c2400";
1586 if (hc_reset (&gohci) < 0) {
1587 hc_release_ohci (&gohci);
1588 /* Initialization failed */
1589 clk_power->CLKCON &= ~(1 << 4);
1593 /* FIXME this is a second HC reset; why?? */
1594 writel (gohci.hc_control = OHCI_USB_RESET, &gohci.regs->control);
1597 if (hc_start (&gohci) < 0) {
1598 err ("can't start usb-%s", gohci.slot_name);
1599 hc_release_ohci (&gohci);
1600 /* Initialization failed */
1601 clk_power->CLKCON &= ~(1 << 4);
1606 ohci_dump (&gohci, 1);
1614 int usb_lowlevel_stop(void)
1616 S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();
1618 /* this gets called really early - before the controller has */
1619 /* even been initialized! */
1622 /* TODO release any interrupts, etc. */
1623 /* call hc_release_ohci() here ? */
1625 /* may not want to do this */
1626 clk_power->CLKCON &= ~(1 << 4);
1630 #endif /* CONFIG_USB_OHCI */