2 * Copyright (c) 2001-2002 by David Brownell
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2 of the License, or (at your
7 * option) any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software Foundation,
16 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 /* this file is part of ehci-hcd.c */
21 #define ehci_dbg(ehci, fmt, args...) \
22 dev_dbg (ehci_to_hcd(ehci)->self.controller , fmt , ## args )
23 #define ehci_err(ehci, fmt, args...) \
24 dev_err (ehci_to_hcd(ehci)->self.controller , fmt , ## args )
25 #define ehci_info(ehci, fmt, args...) \
26 dev_info (ehci_to_hcd(ehci)->self.controller , fmt , ## args )
27 #define ehci_warn(ehci, fmt, args...) \
28 dev_warn (ehci_to_hcd(ehci)->self.controller , fmt , ## args )
31 # define ehci_vdbg ehci_dbg
33 static inline void ehci_vdbg(struct ehci_hcd *ehci, ...) {}
38 /* check the values in the HCSPARAMS register
39 * (host controller _Structural_ parameters)
40 * see EHCI spec, Table 2-4 for each value
42 static void dbg_hcs_params (struct ehci_hcd *ehci, char *label)
44 u32 params = ehci_readl(ehci, &ehci->caps->hcs_params);
47 "%s hcs_params 0x%x dbg=%d%s cc=%d pcc=%d%s%s ports=%d\n",
49 HCS_DEBUG_PORT (params),
50 HCS_INDICATOR (params) ? " ind" : "",
53 HCS_PORTROUTED (params) ? "" : " ordered",
54 HCS_PPC (params) ? "" : " !ppc",
57 /* Port routing, per EHCI 0.95 Spec, Section 2.2.5 */
58 if (HCS_PORTROUTED (params)) {
60 char buf [46], tmp [7], byte;
63 for (i = 0; i < HCS_N_PORTS (params); i++) {
64 // FIXME MIPS won't readb() ...
65 byte = readb (&ehci->caps->portroute[(i>>1)]);
67 ((i & 0x1) ? ((byte)&0xf) : ((byte>>4)&0xf)));
70 ehci_dbg (ehci, "%s portroute %s\n",
76 static inline void dbg_hcs_params (struct ehci_hcd *ehci, char *label) {}
82 /* check the values in the HCCPARAMS register
83 * (host controller _Capability_ parameters)
84 * see EHCI Spec, Table 2-5 for each value
86 static void dbg_hcc_params (struct ehci_hcd *ehci, char *label)
88 u32 params = ehci_readl(ehci, &ehci->caps->hcc_params);
90 if (HCC_ISOC_CACHE (params)) {
92 "%s hcc_params %04x caching frame %s%s%s\n",
94 HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024",
95 HCC_CANPARK(params) ? " park" : "",
96 HCC_64BIT_ADDR(params) ? " 64 bit addr" : "");
99 "%s hcc_params %04x thresh %d uframes %s%s%s%s%s%s%s\n",
102 HCC_ISOC_THRES(params),
103 HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024",
104 HCC_CANPARK(params) ? " park" : "",
105 HCC_64BIT_ADDR(params) ? " 64 bit addr" : "",
106 HCC_LPM(params) ? " LPM" : "",
107 HCC_PER_PORT_CHANGE_EVENT(params) ? " ppce" : "",
108 HCC_HW_PREFETCH(params) ? " hw prefetch" : "",
109 HCC_32FRAME_PERIODIC_LIST(params) ?
110 " 32 periodic list" : "");
115 static inline void dbg_hcc_params (struct ehci_hcd *ehci, char *label) {}
121 static void __maybe_unused
122 dbg_qtd (const char *label, struct ehci_hcd *ehci, struct ehci_qtd *qtd)
124 ehci_dbg(ehci, "%s td %p n%08x %08x t%08x p0=%08x\n", label, qtd,
125 hc32_to_cpup(ehci, &qtd->hw_next),
126 hc32_to_cpup(ehci, &qtd->hw_alt_next),
127 hc32_to_cpup(ehci, &qtd->hw_token),
128 hc32_to_cpup(ehci, &qtd->hw_buf [0]));
130 ehci_dbg(ehci, " p1=%08x p2=%08x p3=%08x p4=%08x\n",
131 hc32_to_cpup(ehci, &qtd->hw_buf[1]),
132 hc32_to_cpup(ehci, &qtd->hw_buf[2]),
133 hc32_to_cpup(ehci, &qtd->hw_buf[3]),
134 hc32_to_cpup(ehci, &qtd->hw_buf[4]));
137 static void __maybe_unused
138 dbg_qh (const char *label, struct ehci_hcd *ehci, struct ehci_qh *qh)
140 struct ehci_qh_hw *hw = qh->hw;
142 ehci_dbg (ehci, "%s qh %p n%08x info %x %x qtd %x\n", label,
143 qh, hw->hw_next, hw->hw_info1, hw->hw_info2, hw->hw_current);
144 dbg_qtd("overlay", ehci, (struct ehci_qtd *) &hw->hw_qtd_next);
147 static void __maybe_unused
148 dbg_itd (const char *label, struct ehci_hcd *ehci, struct ehci_itd *itd)
150 ehci_dbg (ehci, "%s [%d] itd %p, next %08x, urb %p\n",
151 label, itd->frame, itd, hc32_to_cpu(ehci, itd->hw_next),
154 " trans: %08x %08x %08x %08x %08x %08x %08x %08x\n",
155 hc32_to_cpu(ehci, itd->hw_transaction[0]),
156 hc32_to_cpu(ehci, itd->hw_transaction[1]),
157 hc32_to_cpu(ehci, itd->hw_transaction[2]),
158 hc32_to_cpu(ehci, itd->hw_transaction[3]),
159 hc32_to_cpu(ehci, itd->hw_transaction[4]),
160 hc32_to_cpu(ehci, itd->hw_transaction[5]),
161 hc32_to_cpu(ehci, itd->hw_transaction[6]),
162 hc32_to_cpu(ehci, itd->hw_transaction[7]));
164 " buf: %08x %08x %08x %08x %08x %08x %08x\n",
165 hc32_to_cpu(ehci, itd->hw_bufp[0]),
166 hc32_to_cpu(ehci, itd->hw_bufp[1]),
167 hc32_to_cpu(ehci, itd->hw_bufp[2]),
168 hc32_to_cpu(ehci, itd->hw_bufp[3]),
169 hc32_to_cpu(ehci, itd->hw_bufp[4]),
170 hc32_to_cpu(ehci, itd->hw_bufp[5]),
171 hc32_to_cpu(ehci, itd->hw_bufp[6]));
172 ehci_dbg (ehci, " index: %d %d %d %d %d %d %d %d\n",
173 itd->index[0], itd->index[1], itd->index[2],
174 itd->index[3], itd->index[4], itd->index[5],
175 itd->index[6], itd->index[7]);
178 static void __maybe_unused
179 dbg_sitd (const char *label, struct ehci_hcd *ehci, struct ehci_sitd *sitd)
181 ehci_dbg (ehci, "%s [%d] sitd %p, next %08x, urb %p\n",
182 label, sitd->frame, sitd, hc32_to_cpu(ehci, sitd->hw_next),
185 " addr %08x sched %04x result %08x buf %08x %08x\n",
186 hc32_to_cpu(ehci, sitd->hw_fullspeed_ep),
187 hc32_to_cpu(ehci, sitd->hw_uframe),
188 hc32_to_cpu(ehci, sitd->hw_results),
189 hc32_to_cpu(ehci, sitd->hw_buf[0]),
190 hc32_to_cpu(ehci, sitd->hw_buf[1]));
193 static int __maybe_unused
194 dbg_status_buf (char *buf, unsigned len, const char *label, u32 status)
196 return scnprintf (buf, len,
197 "%s%sstatus %04x%s%s%s%s%s%s%s%s%s%s%s",
198 label, label [0] ? " " : "", status,
199 (status & STS_PPCE_MASK) ? " PPCE" : "",
200 (status & STS_ASS) ? " Async" : "",
201 (status & STS_PSS) ? " Periodic" : "",
202 (status & STS_RECL) ? " Recl" : "",
203 (status & STS_HALT) ? " Halt" : "",
204 (status & STS_IAA) ? " IAA" : "",
205 (status & STS_FATAL) ? " FATAL" : "",
206 (status & STS_FLR) ? " FLR" : "",
207 (status & STS_PCD) ? " PCD" : "",
208 (status & STS_ERR) ? " ERR" : "",
209 (status & STS_INT) ? " INT" : ""
213 static int __maybe_unused
214 dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable)
216 return scnprintf (buf, len,
217 "%s%sintrenable %02x%s%s%s%s%s%s%s",
218 label, label [0] ? " " : "", enable,
219 (enable & STS_PPCE_MASK) ? " PPCE" : "",
220 (enable & STS_IAA) ? " IAA" : "",
221 (enable & STS_FATAL) ? " FATAL" : "",
222 (enable & STS_FLR) ? " FLR" : "",
223 (enable & STS_PCD) ? " PCD" : "",
224 (enable & STS_ERR) ? " ERR" : "",
225 (enable & STS_INT) ? " INT" : ""
229 static const char *const fls_strings [] =
230 { "1024", "512", "256", "??" };
233 dbg_command_buf (char *buf, unsigned len, const char *label, u32 command)
235 return scnprintf (buf, len,
236 "%s%scommand %07x %s%s%s%s%s%s=%d ithresh=%d%s%s%s%s "
238 label, label [0] ? " " : "", command,
239 (command & CMD_HIRD) ? " HIRD" : "",
240 (command & CMD_PPCEE) ? " PPCEE" : "",
241 (command & CMD_FSP) ? " FSP" : "",
242 (command & CMD_ASPE) ? " ASPE" : "",
243 (command & CMD_PSPE) ? " PSPE" : "",
244 (command & CMD_PARK) ? " park" : "(park)",
245 CMD_PARK_CNT (command),
246 (command >> 16) & 0x3f,
247 (command & CMD_LRESET) ? " LReset" : "",
248 (command & CMD_IAAD) ? " IAAD" : "",
249 (command & CMD_ASE) ? " Async" : "",
250 (command & CMD_PSE) ? " Periodic" : "",
251 fls_strings [(command >> 2) & 0x3],
252 (command & CMD_RESET) ? " Reset" : "",
253 (command & CMD_RUN) ? "RUN" : "HALT"
258 dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status)
262 /* signaling state */
263 switch (status & (3 << 10)) {
264 case 0 << 10: sig = "se0"; break;
265 case 1 << 10: sig = "k"; break; /* low speed */
266 case 2 << 10: sig = "j"; break;
267 default: sig = "?"; break;
270 return scnprintf (buf, len,
271 "%s%sport:%d status %06x %d %s%s%s%s%s%s "
272 "sig=%s%s%s%s%s%s%s%s%s%s%s",
273 label, label [0] ? " " : "", port, status,
274 status>>25,/*device address */
275 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_ACK ?
277 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_NYET ?
279 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_STALL ?
281 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_ERR ?
283 (status & PORT_POWER) ? " POWER" : "",
284 (status & PORT_OWNER) ? " OWNER" : "",
286 (status & PORT_LPM) ? " LPM" : "",
287 (status & PORT_RESET) ? " RESET" : "",
288 (status & PORT_SUSPEND) ? " SUSPEND" : "",
289 (status & PORT_RESUME) ? " RESUME" : "",
290 (status & PORT_OCC) ? " OCC" : "",
291 (status & PORT_OC) ? " OC" : "",
292 (status & PORT_PEC) ? " PEC" : "",
293 (status & PORT_PE) ? " PE" : "",
294 (status & PORT_CSC) ? " CSC" : "",
295 (status & PORT_CONNECT) ? " CONNECT" : "");
299 static inline void __maybe_unused
300 dbg_qh (char *label, struct ehci_hcd *ehci, struct ehci_qh *qh)
303 static inline int __maybe_unused
304 dbg_status_buf (char *buf, unsigned len, const char *label, u32 status)
307 static inline int __maybe_unused
308 dbg_command_buf (char *buf, unsigned len, const char *label, u32 command)
311 static inline int __maybe_unused
312 dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable)
315 static inline int __maybe_unused
316 dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status)
321 /* functions have the "wrong" filename when they're output... */
322 #define dbg_status(ehci, label, status) { \
324 dbg_status_buf (_buf, sizeof _buf, label, status); \
325 ehci_dbg (ehci, "%s\n", _buf); \
328 #define dbg_cmd(ehci, label, command) { \
330 dbg_command_buf (_buf, sizeof _buf, label, command); \
331 ehci_dbg (ehci, "%s\n", _buf); \
334 #define dbg_port(ehci, label, port, status) { \
336 dbg_port_buf (_buf, sizeof _buf, label, port, status); \
337 ehci_dbg (ehci, "%s\n", _buf); \
340 /*-------------------------------------------------------------------------*/
342 #ifdef STUB_DEBUG_FILES
344 static inline void create_debug_files (struct ehci_hcd *bus) { }
345 static inline void remove_debug_files (struct ehci_hcd *bus) { }
349 /* troubleshooting help: expose state in debugfs */
351 static int debug_async_open(struct inode *, struct file *);
352 static int debug_periodic_open(struct inode *, struct file *);
353 static int debug_registers_open(struct inode *, struct file *);
354 static int debug_async_open(struct inode *, struct file *);
355 static ssize_t debug_lpm_read(struct file *file, char __user *user_buf,
356 size_t count, loff_t *ppos);
357 static ssize_t debug_lpm_write(struct file *file, const char __user *buffer,
358 size_t count, loff_t *ppos);
359 static int debug_lpm_close(struct inode *inode, struct file *file);
361 static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*);
362 static int debug_close(struct inode *, struct file *);
364 static const struct file_operations debug_async_fops = {
365 .owner = THIS_MODULE,
366 .open = debug_async_open,
367 .read = debug_output,
368 .release = debug_close,
369 .llseek = default_llseek,
371 static const struct file_operations debug_periodic_fops = {
372 .owner = THIS_MODULE,
373 .open = debug_periodic_open,
374 .read = debug_output,
375 .release = debug_close,
376 .llseek = default_llseek,
378 static const struct file_operations debug_registers_fops = {
379 .owner = THIS_MODULE,
380 .open = debug_registers_open,
381 .read = debug_output,
382 .release = debug_close,
383 .llseek = default_llseek,
385 static const struct file_operations debug_lpm_fops = {
386 .owner = THIS_MODULE,
388 .read = debug_lpm_read,
389 .write = debug_lpm_write,
390 .release = debug_lpm_close,
391 .llseek = noop_llseek,
394 static struct dentry *ehci_debug_root;
396 struct debug_buffer {
397 ssize_t (*fill_func)(struct debug_buffer *); /* fill method */
399 struct mutex mutex; /* protect filling of buffer */
400 size_t count; /* number of characters filled into buffer */
405 #define speed_char(info1) ({ char tmp; \
406 switch (info1 & (3 << 12)) { \
407 case QH_FULL_SPEED: tmp = 'f'; break; \
408 case QH_LOW_SPEED: tmp = 'l'; break; \
409 case QH_HIGH_SPEED: tmp = 'h'; break; \
410 default: tmp = '?'; break; \
413 static inline char token_mark(struct ehci_hcd *ehci, __hc32 token)
415 __u32 v = hc32_to_cpu(ehci, token);
417 if (v & QTD_STS_ACTIVE)
419 if (v & QTD_STS_HALT)
421 if (!IS_SHORT_READ (v))
423 /* tries to advance through hw_alt_next */
427 static void qh_lines (
428 struct ehci_hcd *ehci,
436 struct list_head *entry;
439 unsigned size = *sizep;
442 __le32 list_end = EHCI_LIST_END(ehci);
443 struct ehci_qh_hw *hw = qh->hw;
445 if (hw->hw_qtd_next == list_end) /* NEC does this */
448 mark = token_mark(ehci, hw->hw_token);
449 if (mark == '/') { /* qh_alt_next controls qh advance? */
450 if ((hw->hw_alt_next & QTD_MASK(ehci))
451 == ehci->async->hw->hw_alt_next)
452 mark = '#'; /* blocked */
453 else if (hw->hw_alt_next == list_end)
454 mark = '.'; /* use hw_qtd_next */
455 /* else alt_next points to some other qtd */
457 scratch = hc32_to_cpup(ehci, &hw->hw_info1);
458 hw_curr = (mark == '*') ? hc32_to_cpup(ehci, &hw->hw_current) : 0;
459 temp = scnprintf (next, size,
460 "qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)",
461 qh, scratch & 0x007f,
462 speed_char (scratch),
463 (scratch >> 8) & 0x000f,
464 scratch, hc32_to_cpup(ehci, &hw->hw_info2),
465 hc32_to_cpup(ehci, &hw->hw_token), mark,
466 (cpu_to_hc32(ehci, QTD_TOGGLE) & hw->hw_token)
468 (hc32_to_cpup(ehci, &hw->hw_alt_next) >> 1) & 0x0f);
472 /* hc may be modifying the list as we read it ... */
473 list_for_each (entry, &qh->qtd_list) {
474 td = list_entry (entry, struct ehci_qtd, qtd_list);
475 scratch = hc32_to_cpup(ehci, &td->hw_token);
477 if (hw_curr == td->qtd_dma)
479 else if (hw->hw_qtd_next == cpu_to_hc32(ehci, td->qtd_dma))
481 else if (QTD_LENGTH (scratch)) {
482 if (td->hw_alt_next == ehci->async->hw->hw_alt_next)
484 else if (td->hw_alt_next != list_end)
487 temp = snprintf (next, size,
488 "\n\t%p%c%s len=%d %08x urb %p",
489 td, mark, ({ char *tmp;
490 switch ((scratch>>8)&0x03) {
491 case 0: tmp = "out"; break;
492 case 1: tmp = "in"; break;
493 case 2: tmp = "setup"; break;
494 default: tmp = "?"; break;
496 (scratch >> 16) & 0x7fff,
507 temp = snprintf (next, size, "\n");
518 static ssize_t fill_async_buffer(struct debug_buffer *buf)
521 struct ehci_hcd *ehci;
527 hcd = bus_to_hcd(buf->bus);
528 ehci = hcd_to_ehci (hcd);
529 next = buf->output_buf;
530 size = buf->alloc_size;
534 /* dumps a snapshot of the async schedule.
535 * usually empty except for long-term bulk reads, or head.
536 * one QH per line, and TDs we know about
538 spin_lock_irqsave (&ehci->lock, flags);
539 for (qh = ehci->async->qh_next.qh; size > 0 && qh; qh = qh->qh_next.qh)
540 qh_lines (ehci, qh, &next, &size);
541 if (ehci->async_unlink && size > 0) {
542 temp = scnprintf(next, size, "\nunlink =\n");
546 for (qh = ehci->async_unlink; size > 0 && qh;
547 qh = qh->unlink_next)
548 qh_lines (ehci, qh, &next, &size);
550 spin_unlock_irqrestore (&ehci->lock, flags);
552 return strlen(buf->output_buf);
555 #define DBG_SCHED_LIMIT 64
556 static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
559 struct ehci_hcd *ehci;
561 union ehci_shadow p, *seen;
562 unsigned temp, size, seen_count;
567 if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC)))
571 hcd = bus_to_hcd(buf->bus);
572 ehci = hcd_to_ehci (hcd);
573 next = buf->output_buf;
574 size = buf->alloc_size;
576 temp = scnprintf (next, size, "size = %d\n", ehci->periodic_size);
580 /* dump a snapshot of the periodic schedule.
581 * iso changes, interrupt usually doesn't.
583 spin_lock_irqsave (&ehci->lock, flags);
584 for (i = 0; i < ehci->periodic_size; i++) {
585 p = ehci->pshadow [i];
588 tag = Q_NEXT_TYPE(ehci, ehci->periodic [i]);
590 temp = scnprintf (next, size, "%4d: ", i);
595 struct ehci_qh_hw *hw;
597 switch (hc32_to_cpu(ehci, tag)) {
600 temp = scnprintf (next, size, " qh%d-%04x/%p",
605 & (QH_CMASK | QH_SMASK),
609 /* don't repeat what follows this qh */
610 for (temp = 0; temp < seen_count; temp++) {
611 if (seen [temp].ptr != p.ptr)
613 if (p.qh->qh_next.ptr) {
614 temp = scnprintf (next, size,
621 /* show more info the first time around */
622 if (temp == seen_count) {
623 u32 scratch = hc32_to_cpup(ehci,
625 struct ehci_qtd *qtd;
628 /* count tds, get ep direction */
630 list_for_each_entry (qtd,
634 switch (0x03 & (hc32_to_cpu(
636 qtd->hw_token) >> 8)) {
637 case 0: type = "out"; continue;
638 case 1: type = "in"; continue;
642 temp = scnprintf (next, size,
645 speed_char (scratch),
647 (scratch >> 8) & 0x000f, type,
648 p.qh->usecs, p.qh->c_usecs,
650 0x7ff & (scratch >> 16));
652 if (seen_count < DBG_SCHED_LIMIT)
653 seen [seen_count++].qh = p.qh;
657 tag = Q_NEXT_TYPE(ehci, hw->hw_next);
662 temp = scnprintf (next, size,
663 " fstn-%8x/%p", p.fstn->hw_prev,
665 tag = Q_NEXT_TYPE(ehci, p.fstn->hw_next);
666 p = p.fstn->fstn_next;
669 temp = scnprintf (next, size,
671 tag = Q_NEXT_TYPE(ehci, p.itd->hw_next);
675 temp = scnprintf (next, size,
677 p.sitd->stream->interval,
678 hc32_to_cpup(ehci, &p.sitd->hw_uframe)
681 tag = Q_NEXT_TYPE(ehci, p.sitd->hw_next);
682 p = p.sitd->sitd_next;
689 temp = scnprintf (next, size, "\n");
693 spin_unlock_irqrestore (&ehci->lock, flags);
696 return buf->alloc_size - size;
698 #undef DBG_SCHED_LIMIT
700 static const char *rh_state_string(struct ehci_hcd *ehci)
702 switch (ehci->rh_state) {
705 case EHCI_RH_SUSPENDED:
707 case EHCI_RH_RUNNING:
709 case EHCI_RH_STOPPING:
715 static ssize_t fill_registers_buffer(struct debug_buffer *buf)
718 struct ehci_hcd *ehci;
720 unsigned temp, size, i;
721 char *next, scratch [80];
722 static char fmt [] = "%*s\n";
723 static char label [] = "";
725 hcd = bus_to_hcd(buf->bus);
726 ehci = hcd_to_ehci (hcd);
727 next = buf->output_buf;
728 size = buf->alloc_size;
730 spin_lock_irqsave (&ehci->lock, flags);
732 if (!HCD_HW_ACCESSIBLE(hcd)) {
733 size = scnprintf (next, size,
734 "bus %s, device %s\n"
736 "SUSPENDED (no register access)\n",
737 hcd->self.controller->bus->name,
738 dev_name(hcd->self.controller),
743 /* Capability Registers */
744 i = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
745 temp = scnprintf (next, size,
746 "bus %s, device %s\n"
748 "EHCI %x.%02x, rh state %s\n",
749 hcd->self.controller->bus->name,
750 dev_name(hcd->self.controller),
752 i >> 8, i & 0x0ff, rh_state_string(ehci));
757 /* EHCI 0.96 and later may have "extended capabilities" */
758 if (hcd->self.controller->bus == &pci_bus_type) {
759 struct pci_dev *pdev;
760 u32 offset, cap, cap2;
761 unsigned count = 256/4;
763 pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller);
764 offset = HCC_EXT_CAPS(ehci_readl(ehci,
765 &ehci->caps->hcc_params));
766 while (offset && count--) {
767 pci_read_config_dword (pdev, offset, &cap);
768 switch (cap & 0xff) {
770 temp = scnprintf (next, size,
771 "ownership %08x%s%s\n", cap,
772 (cap & (1 << 24)) ? " linux" : "",
773 (cap & (1 << 16)) ? " firmware" : "");
778 pci_read_config_dword (pdev, offset, &cap2);
779 temp = scnprintf (next, size,
780 "SMI sts/enable 0x%08x\n", cap2);
784 case 0: /* illegal reserved capability */
787 default: /* unknown */
790 temp = (cap >> 8) & 0xff;
795 // FIXME interpret both types of params
796 i = ehci_readl(ehci, &ehci->caps->hcs_params);
797 temp = scnprintf (next, size, "structural params 0x%08x\n", i);
801 i = ehci_readl(ehci, &ehci->caps->hcc_params);
802 temp = scnprintf (next, size, "capability params 0x%08x\n", i);
806 /* Operational Registers */
807 temp = dbg_status_buf (scratch, sizeof scratch, label,
808 ehci_readl(ehci, &ehci->regs->status));
809 temp = scnprintf (next, size, fmt, temp, scratch);
813 temp = dbg_command_buf (scratch, sizeof scratch, label,
814 ehci_readl(ehci, &ehci->regs->command));
815 temp = scnprintf (next, size, fmt, temp, scratch);
819 temp = dbg_intr_buf (scratch, sizeof scratch, label,
820 ehci_readl(ehci, &ehci->regs->intr_enable));
821 temp = scnprintf (next, size, fmt, temp, scratch);
825 temp = scnprintf (next, size, "uframe %04x\n",
826 ehci_read_frame_index(ehci));
830 for (i = 1; i <= HCS_N_PORTS (ehci->hcs_params); i++) {
831 temp = dbg_port_buf (scratch, sizeof scratch, label, i,
833 &ehci->regs->port_status[i - 1]));
834 temp = scnprintf (next, size, fmt, temp, scratch);
837 if (i == HCS_DEBUG_PORT(ehci->hcs_params) && ehci->debug) {
838 temp = scnprintf (next, size,
839 " debug control %08x\n",
841 &ehci->debug->control));
847 if (ehci->async_unlink) {
848 temp = scnprintf(next, size, "async unlink qh %p\n",
855 temp = scnprintf (next, size,
856 "irq normal %ld err %ld iaa %ld (lost %ld)\n",
857 ehci->stats.normal, ehci->stats.error, ehci->stats.iaa,
858 ehci->stats.lost_iaa);
862 temp = scnprintf (next, size, "complete %ld unlink %ld\n",
863 ehci->stats.complete, ehci->stats.unlink);
869 spin_unlock_irqrestore (&ehci->lock, flags);
871 return buf->alloc_size - size;
874 static struct debug_buffer *alloc_buffer(struct usb_bus *bus,
875 ssize_t (*fill_func)(struct debug_buffer *))
877 struct debug_buffer *buf;
879 buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL);
883 buf->fill_func = fill_func;
884 mutex_init(&buf->mutex);
885 buf->alloc_size = PAGE_SIZE;
891 static int fill_buffer(struct debug_buffer *buf)
895 if (!buf->output_buf)
896 buf->output_buf = vmalloc(buf->alloc_size);
898 if (!buf->output_buf) {
903 ret = buf->fill_func(buf);
914 static ssize_t debug_output(struct file *file, char __user *user_buf,
915 size_t len, loff_t *offset)
917 struct debug_buffer *buf = file->private_data;
920 mutex_lock(&buf->mutex);
921 if (buf->count == 0) {
922 ret = fill_buffer(buf);
924 mutex_unlock(&buf->mutex);
928 mutex_unlock(&buf->mutex);
930 ret = simple_read_from_buffer(user_buf, len, offset,
931 buf->output_buf, buf->count);
938 static int debug_close(struct inode *inode, struct file *file)
940 struct debug_buffer *buf = file->private_data;
943 vfree(buf->output_buf);
949 static int debug_async_open(struct inode *inode, struct file *file)
951 file->private_data = alloc_buffer(inode->i_private, fill_async_buffer);
953 return file->private_data ? 0 : -ENOMEM;
956 static int debug_periodic_open(struct inode *inode, struct file *file)
958 struct debug_buffer *buf;
959 buf = alloc_buffer(inode->i_private, fill_periodic_buffer);
963 buf->alloc_size = (sizeof(void *) == 4 ? 6 : 8)*PAGE_SIZE;
964 file->private_data = buf;
968 static int debug_registers_open(struct inode *inode, struct file *file)
970 file->private_data = alloc_buffer(inode->i_private,
971 fill_registers_buffer);
973 return file->private_data ? 0 : -ENOMEM;
976 static int debug_lpm_close(struct inode *inode, struct file *file)
981 static ssize_t debug_lpm_read(struct file *file, char __user *user_buf,
982 size_t count, loff_t *ppos)
984 /* TODO: show lpm stats */
988 static ssize_t debug_lpm_write(struct file *file, const char __user *user_buf,
989 size_t count, loff_t *ppos)
992 struct ehci_hcd *ehci;
997 u32 __iomem *portsc ;
1000 hcd = bus_to_hcd(file->private_data);
1001 ehci = hcd_to_ehci(hcd);
1003 len = min(count, sizeof(buf) - 1);
1004 if (copy_from_user(buf, user_buf, len))
1007 if (len > 0 && buf[len - 1] == '\n')
1008 buf[len - 1] = '\0';
1010 if (strncmp(buf, "enable", 5) == 0) {
1011 if (strict_strtoul(buf + 7, 10, &port))
1013 params = ehci_readl(ehci, &ehci->caps->hcs_params);
1014 if (port > HCS_N_PORTS(params)) {
1015 ehci_dbg(ehci, "ERR: LPM on bad port %lu\n", port);
1018 portsc = &ehci->regs->port_status[port-1];
1019 temp = ehci_readl(ehci, portsc);
1020 if (!(temp & PORT_DEV_ADDR)) {
1021 ehci_dbg(ehci, "LPM: no device attached\n");
1025 ehci_writel(ehci, temp, portsc);
1026 printk(KERN_INFO "force enable LPM for port %lu\n", port);
1027 } else if (strncmp(buf, "hird=", 5) == 0) {
1029 if (strict_strtoul(buf + 5, 16, &hird))
1031 printk(KERN_INFO "setting hird %s %lu\n", buf + 6, hird);
1032 ehci->command = (ehci->command & ~CMD_HIRD) | (hird << 24);
1033 ehci_writel(ehci, ehci->command, &ehci->regs->command);
1034 } else if (strncmp(buf, "disable", 7) == 0) {
1035 if (strict_strtoul(buf + 8, 10, &port))
1037 params = ehci_readl(ehci, &ehci->caps->hcs_params);
1038 if (port > HCS_N_PORTS(params)) {
1039 ehci_dbg(ehci, "ERR: LPM off bad port %lu\n", port);
1042 portsc = &ehci->regs->port_status[port-1];
1043 temp = ehci_readl(ehci, portsc);
1044 if (!(temp & PORT_DEV_ADDR)) {
1045 ehci_dbg(ehci, "ERR: no device attached\n");
1049 ehci_writel(ehci, temp, portsc);
1050 printk(KERN_INFO "disabled LPM for port %lu\n", port);
1056 static inline void create_debug_files (struct ehci_hcd *ehci)
1058 struct usb_bus *bus = &ehci_to_hcd(ehci)->self;
1060 ehci->debug_dir = debugfs_create_dir(bus->bus_name, ehci_debug_root);
1061 if (!ehci->debug_dir)
1064 if (!debugfs_create_file("async", S_IRUGO, ehci->debug_dir, bus,
1068 if (!debugfs_create_file("periodic", S_IRUGO, ehci->debug_dir, bus,
1069 &debug_periodic_fops))
1072 if (!debugfs_create_file("registers", S_IRUGO, ehci->debug_dir, bus,
1073 &debug_registers_fops))
1076 if (!debugfs_create_file("lpm", S_IRUGO|S_IWUSR, ehci->debug_dir, bus,
1083 debugfs_remove_recursive(ehci->debug_dir);
1086 static inline void remove_debug_files (struct ehci_hcd *ehci)
1088 debugfs_remove_recursive(ehci->debug_dir);
1091 #endif /* STUB_DEBUG_FILES */