+++ /dev/null
-/*
- * ADM5120 HCD (Host Controller Driver) for USB
- *
- * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org>
- *
- * This file was derived from: drivers/usb/host/ohci-dbg.c
- * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
- * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published
- * by the Free Software Foundation.
- *
- */
-
-/*-------------------------------------------------------------------------*/
-
-static inline char *ed_typestring(int ed_type)
-{
- switch (ed_type) {
- case PIPE_CONTROL:
- return "ctrl";
- case PIPE_BULK:
- return "bulk";
- case PIPE_INTERRUPT:
- return "intr";
- case PIPE_ISOCHRONOUS:
- return "isoc";
- }
- return "(bad ed_type)";
-}
-
-static inline char *ed_statestring(int state)
-{
- switch (state) {
- case ED_IDLE:
- return "IDLE";
- case ED_UNLINK:
- return "UNLINK";
- case ED_OPER:
- return "OPER";
- }
- return "?STATE";
-}
-
-static inline char *pipestring(int pipe)
-{
- return ed_typestring(usb_pipetype(pipe));
-}
-
-static inline char *td_pidstring(u32 info)
-{
- switch (info & TD_DP) {
- case TD_DP_SETUP:
- return "SETUP";
- case TD_DP_IN:
- return "IN";
- case TD_DP_OUT:
- return "OUT";
- }
- return "?PID";
-}
-
-static inline char *td_togglestring(u32 info)
-{
- switch (info & TD_T) {
- case TD_T_DATA0:
- return "DATA0";
- case TD_T_DATA1:
- return "DATA1";
- case TD_T_CARRY:
- return "CARRY";
- }
- return "?TOGGLE";
-}
-
-/*-------------------------------------------------------------------------*/
-
-#ifdef DEBUG
-
-/* debug| print the main components of an URB
- * small: 0) header + data packets 1) just header
- */
-static void __attribute__((unused))
-urb_print(struct admhcd *ahcd, struct urb *urb, char *str, int small, int status)
-{
- unsigned int pipe = urb->pipe;
-
- if (!urb->dev || !urb->dev->bus) {
- admhc_dbg(ahcd, "%s URB: no dev", str);
- return;
- }
-
-#ifndef ADMHC_VERBOSE_DEBUG
- if (status != 0)
-#endif
- admhc_dbg(ahcd, "URB-%s %p dev=%d ep=%d%s-%s flags=%x len=%d/%d "
- "stat=%d\n",
- str,
- urb,
- usb_pipedevice(pipe),
- usb_pipeendpoint(pipe),
- usb_pipeout(pipe) ? "out" : "in",
- pipestring(pipe),
- urb->transfer_flags,
- urb->actual_length,
- urb->transfer_buffer_length,
- status);
-
-#ifdef ADMHC_VERBOSE_DEBUG
- if (!small) {
- int i, len;
-
- if (usb_pipecontrol(pipe)) {
- admhc_dbg(ahcd, "setup(8):");
- for (i = 0; i < 8 ; i++)
- printk(KERN_INFO" %02x", ((__u8 *)urb->setup_packet)[i]);
- printk(KERN_INFO "\n");
- }
- if (urb->transfer_buffer_length > 0 && urb->transfer_buffer) {
- admhc_dbg(ahcd, "data(%d/%d):",
- urb->actual_length,
- urb->transfer_buffer_length);
- len = usb_pipeout(pipe) ?
- urb->transfer_buffer_length : urb->actual_length;
- for (i = 0; i < 16 && i < len; i++)
- printk(KERN_INFO " %02x", ((__u8 *)urb->transfer_buffer)[i]);
- printk(KERN_INFO "%s stat:%d\n", i < len ? "..." : "", status);
- }
- }
-#endif /* ADMHC_VERBOSE_DEBUG */
-}
-
-#define admhc_dbg_sw(ahcd, next, size, format, arg...) \
- do { \
- if (next) { \
- unsigned s_len; \
- s_len = scnprintf(*next, *size, format, ## arg); \
- *size -= s_len; *next += s_len; \
- } else \
- admhc_dbg(ahcd, format, ## arg); \
- } while (0);
-
-
-static void admhc_dump_intr_mask(struct admhcd *ahcd, char *label, u32 mask,
- char **next, unsigned *size)
-{
- admhc_dbg_sw(ahcd, next, size, "%s 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n",
- label,
- mask,
- (mask & ADMHC_INTR_INTA) ? " INTA" : "",
- (mask & ADMHC_INTR_FATI) ? " FATI" : "",
- (mask & ADMHC_INTR_SWI) ? " SWI" : "",
- (mask & ADMHC_INTR_TDC) ? " TDC" : "",
- (mask & ADMHC_INTR_FNO) ? " FNO" : "",
- (mask & ADMHC_INTR_SO) ? " SO" : "",
- (mask & ADMHC_INTR_INSM) ? " INSM" : "",
- (mask & ADMHC_INTR_BABI) ? " BABI" : "",
- (mask & ADMHC_INTR_7) ? " !7!" : "",
- (mask & ADMHC_INTR_6) ? " !6!" : "",
- (mask & ADMHC_INTR_RESI) ? " RESI" : "",
- (mask & ADMHC_INTR_SOFI) ? " SOFI" : ""
- );
-}
-
-static void maybe_print_eds(struct admhcd *ahcd, char *label, u32 value,
- char **next, unsigned *size)
-{
- if (value)
- admhc_dbg_sw(ahcd, next, size, "%s %08x\n", label, value);
-}
-
-static char *buss2string(int state)
-{
- switch (state) {
- case ADMHC_BUSS_RESET:
- return "reset";
- case ADMHC_BUSS_RESUME:
- return "resume";
- case ADMHC_BUSS_OPER:
- return "operational";
- case ADMHC_BUSS_SUSPEND:
- return "suspend";
- }
- return "?state";
-}
-
-static void
-admhc_dump_status(struct admhcd *ahcd, char **next, unsigned *size)
-{
- struct admhcd_regs __iomem *regs = ahcd->regs;
- u32 temp;
-
- temp = admhc_readl(ahcd, ®s->gencontrol);
- admhc_dbg_sw(ahcd, next, size,
- "gencontrol 0x%08x%s%s%s%s\n",
- temp,
- (temp & ADMHC_CTRL_UHFE) ? " UHFE" : "",
- (temp & ADMHC_CTRL_SIR) ? " SIR" : "",
- (temp & ADMHC_CTRL_DMAA) ? " DMAA" : "",
- (temp & ADMHC_CTRL_SR) ? " SR" : ""
- );
-
- temp = admhc_readl(ahcd, ®s->host_control);
- admhc_dbg_sw(ahcd, next, size,
- "host_control 0x%08x BUSS=%s%s\n",
- temp,
- buss2string(temp & ADMHC_HC_BUSS),
- (temp & ADMHC_HC_DMAE) ? " DMAE" : ""
- );
-
- admhc_dump_intr_mask(ahcd, "int_status",
- admhc_readl(ahcd, ®s->int_status),
- next, size);
- admhc_dump_intr_mask(ahcd, "int_enable",
- admhc_readl(ahcd, ®s->int_enable),
- next, size);
-
- maybe_print_eds(ahcd, "hosthead",
- admhc_readl(ahcd, ®s->hosthead), next, size);
-}
-
-#define dbg_port_sw(hc, num, value, next, size) \
- admhc_dbg_sw(hc, next, size, \
- "portstatus [%d] " \
- "0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \
- num, temp, \
- (temp & ADMHC_PS_PRSC) ? " PRSC" : "", \
- (temp & ADMHC_PS_OCIC) ? " OCIC" : "", \
- (temp & ADMHC_PS_PSSC) ? " PSSC" : "", \
- (temp & ADMHC_PS_PESC) ? " PESC" : "", \
- (temp & ADMHC_PS_CSC) ? " CSC" : "", \
- \
- (temp & ADMHC_PS_LSDA) ? " LSDA" : "", \
- (temp & ADMHC_PS_PPS) ? " PPS" : "", \
- (temp & ADMHC_PS_PRS) ? " PRS" : "", \
- (temp & ADMHC_PS_POCI) ? " POCI" : "", \
- (temp & ADMHC_PS_PSS) ? " PSS" : "", \
- \
- (temp & ADMHC_PS_PES) ? " PES" : "", \
- (temp & ADMHC_PS_CCS) ? " CCS" : "" \
- );
-
-
-static void
-admhc_dump_roothub(
- struct admhcd *ahcd,
- int verbose,
- char **next,
- unsigned *size)
-{
- u32 temp, i;
-
- temp = admhc_read_rhdesc(ahcd);
- if (temp == ~(u32)0)
- return;
-
- if (verbose) {
- admhc_dbg_sw(ahcd, next, size,
- "rhdesc %08x%s%s%s%s%s%s PPCM=%02x%s%s%s%s NUMP=%d(%d)\n",
- temp,
- (temp & ADMHC_RH_CRWE) ? " CRWE" : "",
- (temp & ADMHC_RH_OCIC) ? " OCIC" : "",
- (temp & ADMHC_RH_LPSC) ? " LPSC" : "",
- (temp & ADMHC_RH_LPSC) ? " DRWE" : "",
- (temp & ADMHC_RH_LPSC) ? " OCI" : "",
- (temp & ADMHC_RH_LPSC) ? " LPS" : "",
- ((temp & ADMHC_RH_PPCM) >> 16),
- (temp & ADMHC_RH_NOCP) ? " NOCP" : "",
- (temp & ADMHC_RH_OCPM) ? " OCPM" : "",
- (temp & ADMHC_RH_NPS) ? " NPS" : "",
- (temp & ADMHC_RH_PSM) ? " PSM" : "",
- (temp & ADMHC_RH_NUMP), ahcd->num_ports
- );
- }
-
- for (i = 0; i < ahcd->num_ports; i++) {
- temp = admhc_read_portstatus(ahcd, i);
- dbg_port_sw(ahcd, i, temp, next, size);
- }
-}
-
-static void admhc_dump(struct admhcd *ahcd, int verbose)
-{
- admhc_dbg(ahcd, "ADMHC ahcd state\n");
-
- /* dumps some of the state we know about */
- admhc_dump_status(ahcd, NULL, NULL);
- admhc_dbg(ahcd, "current frame #%04x\n",
- admhc_frame_no(ahcd));
-
- admhc_dump_roothub(ahcd, verbose, NULL, NULL);
-}
-
-static const char data0[] = "DATA0";
-static const char data1[] = "DATA1";
-
-static void admhc_dump_td(const struct admhcd *ahcd, const char *label,
- const struct td *td)
-{
- u32 tmp;
-
- admhc_dbg(ahcd, "%s td %p; urb %p index %d; hwNextTD %08x\n",
- label, td,
- td->urb, td->index,
- hc32_to_cpup(ahcd, &td->hwNextTD));
-
- tmp = hc32_to_cpup(ahcd, &td->hwINFO);
- admhc_dbg(ahcd, " status %08x%s CC=%x EC=%d %s %s ISI=%x FN=%x\n",
- tmp,
- (tmp & TD_OWN) ? " OWN" : "",
- TD_CC_GET(tmp),
- TD_EC_GET(tmp),
- td_togglestring(tmp),
- td_pidstring(tmp),
- TD_ISI_GET(tmp),
- TD_FN_GET(tmp));
-
- tmp = hc32_to_cpup(ahcd, &td->hwCBL);
- admhc_dbg(ahcd, " dbp %08x; cbl %08x; LEN=%d%s\n",
- hc32_to_cpup(ahcd, &td->hwDBP),
- tmp,
- TD_BL_GET(tmp),
- (tmp & TD_IE) ? " IE" : "");
-}
-
-/* caller MUST own hcd spinlock if verbose is set! */
-static void __attribute__((unused))
-admhc_dump_ed(const struct admhcd *ahcd, const char *label,
- const struct ed *ed, int verbose)
-{
- u32 tmp = hc32_to_cpu(ahcd, ed->hwINFO);
-
- admhc_dbg(ahcd, "%s ed %p %s type %s; next ed %08x\n",
- label,
- ed, ed_statestring(ed->state), ed_typestring(ed->type),
- hc32_to_cpup(ahcd, &ed->hwNextED));
-
- admhc_dbg(ahcd, " info %08x MAX=%d%s%s%s%s EP=%d DEV=%d\n", tmp,
- ED_MPS_GET(tmp),
- (tmp & ED_ISO) ? " ISO" : "",
- (tmp & ED_SKIP) ? " SKIP" : "",
- (tmp & ED_SPEED_FULL) ? " FULL" : " LOW",
- (tmp & ED_INT) ? " INT" : "",
- ED_EN_GET(tmp),
- ED_FA_GET(tmp));
-
- tmp = hc32_to_cpup(ahcd, &ed->hwHeadP);
- admhc_dbg(ahcd, " tds: head %08x tail %08x %s%s%s\n",
- tmp & TD_MASK,
- hc32_to_cpup(ahcd, &ed->hwTailP),
- (tmp & ED_C) ? data1 : data0,
- (tmp & ED_H) ? " HALT" : "",
- verbose ? " td list follows" : " (not listing)");
-
- if (verbose) {
- struct list_head *tmp;
-
- /* use ed->td_list because HC concurrently modifies
- * hwNextTD as it accumulates ed_donelist.
- */
- list_for_each(tmp, &ed->td_list) {
- struct td *td;
- td = list_entry(tmp, struct td, td_list);
- admhc_dump_td(ahcd, " ->", td);
- }
- }
-}
-
-#else /* ifdef DEBUG */
-
-static inline void urb_print(struct admhcd *ahcd, struct urb * urb, char * str,
- int small, int status) {}
-static inline void admhc_dump_ed(const struct admhcd *ahcd, const char *label,
- const struct ed *ed, int verbose) {}
-static inline void admhc_dump_td(const struct admhcd *ahcd, const char *label,
- const struct td *td) {}
-static inline void admhc_dump(struct admhcd *ahcd, int verbose) {}
-
-#undef ADMHC_VERBOSE_DEBUG
-
-#endif /* DEBUG */
-
-/*-------------------------------------------------------------------------*/
-
-#ifdef STUB_DEBUG_FILES
-
-static inline void create_debug_files(struct admhcd *bus) { }
-static inline void remove_debug_files(struct admhcd *bus) { }
-
-#else
-
-static int debug_async_open(struct inode *, struct file *);
-static int debug_periodic_open(struct inode *, struct file *);
-static int debug_registers_open(struct inode *, struct file *);
-static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*);
-static int debug_close(struct inode *, struct file *);
-
-static const struct file_operations debug_async_fops = {
- .owner = THIS_MODULE,
- .open = debug_async_open,
- .read = debug_output,
- .release = debug_close,
- .llseek = default_llseek,
-};
-static const struct file_operations debug_periodic_fops = {
- .owner = THIS_MODULE,
- .open = debug_periodic_open,
- .read = debug_output,
- .release = debug_close,
- .llseek = default_llseek,
-};
-static const struct file_operations debug_registers_fops = {
- .owner = THIS_MODULE,
- .open = debug_registers_open,
- .read = debug_output,
- .release = debug_close,
- .llseek = default_llseek,
-};
-
-static struct dentry *admhc_debug_root;
-
-struct debug_buffer {
- ssize_t (*fill_func)(struct debug_buffer *); /* fill method */
- struct admhcd *ahcd;
- struct mutex mutex; /* protect filling of buffer */
- size_t count; /* number of characters filled into buffer */
- char *page;
-};
-
-static ssize_t
-show_list(struct admhcd *ahcd, char *buf, size_t count, struct ed *ed)
-{
- unsigned temp;
- unsigned size = count;
-
- if (!ed)
- return 0;
-
- /* dump a snapshot of the bulk or control schedule */
- while (ed) {
- u32 info = hc32_to_cpu(ahcd, ed->hwINFO);
- u32 headp = hc32_to_cpu(ahcd, ed->hwHeadP);
- u32 tailp = hc32_to_cpu(ahcd, ed->hwTailP);
- struct list_head *entry;
- struct td *td;
-
- temp = scnprintf(buf, size,
- "ed/%p %s %s %cs dev%d ep%d %s%smax %d %08x%s%s %s"
- " h:%08x t:%08x",
- ed,
- ed_statestring(ed->state),
- ed_typestring(ed->type),
- (info & ED_SPEED_FULL) ? 'f' : 'l',
- info & ED_FA_MASK,
- (info >> ED_EN_SHIFT) & ED_EN_MASK,
- (info & ED_INT) ? "INT " : "",
- (info & ED_ISO) ? "ISO " : "",
- (info >> ED_MPS_SHIFT) & ED_MPS_MASK ,
- info,
- (info & ED_SKIP) ? " S" : "",
- (headp & ED_H) ? " H" : "",
- (headp & ED_C) ? data1 : data0,
- headp & ED_MASK, tailp);
- size -= temp;
- buf += temp;
-
- list_for_each(entry, &ed->td_list) {
- u32 dbp, cbl;
-
- td = list_entry(entry, struct td, td_list);
- info = hc32_to_cpup(ahcd, &td->hwINFO);
- dbp = hc32_to_cpup(ahcd, &td->hwDBP);
- cbl = hc32_to_cpup(ahcd, &td->hwCBL);
-
- temp = scnprintf(buf, size,
- "\n\ttd/%p %s %d %s%scc=%x urb %p (%08x,%08x)",
- td,
- td_pidstring(info),
- TD_BL_GET(cbl),
- (info & TD_OWN) ? "" : "DONE ",
- (cbl & TD_IE) ? "IE " : "",
- TD_CC_GET(info), td->urb, info, cbl);
- size -= temp;
- buf += temp;
- }
-
- temp = scnprintf(buf, size, "\n");
- size -= temp;
- buf += temp;
-
- ed = ed->ed_next;
- }
-
- return count - size;
-}
-
-static ssize_t fill_async_buffer(struct debug_buffer *buf)
-{
- struct admhcd *ahcd;
- size_t temp;
- unsigned long flags;
-
- ahcd = buf->ahcd;
-
- spin_lock_irqsave(&ahcd->lock, flags);
- temp = show_list(ahcd, buf->page, PAGE_SIZE, ahcd->ed_head);
- spin_unlock_irqrestore(&ahcd->lock, flags);
-
- return temp;
-}
-
-
-#define DBG_SCHED_LIMIT 64
-
-static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
-{
- struct admhcd *ahcd;
- struct ed **seen, *ed;
- unsigned long flags;
- unsigned temp, size, seen_count;
- char *next;
- unsigned i;
-
- seen = kmalloc(DBG_SCHED_LIMIT * sizeof(*seen), GFP_ATOMIC);
- if (!seen)
- return 0;
- seen_count = 0;
-
- ahcd = buf->ahcd;
- next = buf->page;
- size = PAGE_SIZE;
-
- temp = scnprintf(next, size, "size = %d\n", NUM_INTS);
- size -= temp;
- next += temp;
-
- /* dump a snapshot of the periodic schedule (and load) */
- spin_lock_irqsave(&ahcd->lock, flags);
- for (i = 0; i < NUM_INTS; i++) {
- ed = ahcd->periodic[i];
- if (!ed)
- continue;
-
- temp = scnprintf(next, size, "%2d [%3d]:", i, ahcd->load[i]);
- size -= temp;
- next += temp;
-
- do {
- temp = scnprintf(next, size, " ed%d/%p",
- ed->interval, ed);
- size -= temp;
- next += temp;
- for (temp = 0; temp < seen_count; temp++) {
- if (seen[temp] == ed)
- break;
- }
-
- /* show more info the first time around */
- if (temp == seen_count) {
- u32 info = hc32_to_cpu(ahcd, ed->hwINFO);
- struct list_head *entry;
- unsigned qlen = 0;
-
- /* qlen measured here in TDs, not urbs */
- list_for_each(entry, &ed->td_list)
- qlen++;
- temp = scnprintf(next, size,
- " (%cs dev%d ep%d%s qlen %u"
- " max %d %08x%s%s)",
- (info & ED_SPEED_FULL) ? 'f' : 'l',
- ED_FA_GET(info),
- ED_EN_GET(info),
- (info & ED_ISO) ? "iso" : "int",
- qlen,
- ED_MPS_GET(info),
- info,
- (info & ED_SKIP) ? " K" : "",
- (ed->hwHeadP &
- cpu_to_hc32(ahcd, ED_H)) ?
- " H" : "");
- size -= temp;
- next += temp;
-
- if (seen_count < DBG_SCHED_LIMIT)
- seen[seen_count++] = ed;
-
- ed = ed->ed_next;
-
- } else {
- /* we've seen it and what's after */
- temp = 0;
- ed = NULL;
- }
-
- } while (ed);
-
- temp = scnprintf(next, size, "\n");
- size -= temp;
- next += temp;
- }
- spin_unlock_irqrestore(&ahcd->lock, flags);
- kfree(seen);
-
- return PAGE_SIZE - size;
-}
-
-
-#undef DBG_SCHED_LIMIT
-
-static ssize_t fill_registers_buffer(struct debug_buffer *buf)
-{
- struct usb_hcd *hcd;
- struct admhcd *ahcd;
- struct admhcd_regs __iomem *regs;
- unsigned long flags;
- unsigned temp, size;
- char *next;
- u32 rdata;
-
- ahcd = buf->ahcd;
- hcd = admhc_to_hcd(ahcd);
- regs = ahcd->regs;
- next = buf->page;
- size = PAGE_SIZE;
-
- spin_lock_irqsave(&ahcd->lock, flags);
-
- /* dump driver info, then registers in spec order */
-
- admhc_dbg_sw(ahcd, &next, &size,
- "bus %s, device %s\n"
- "%s\n"
- "%s\n",
- hcd->self.controller->bus->name,
- dev_name(hcd->self.controller),
- hcd->product_desc,
- hcd_name);
-
- if (!HCD_HW_ACCESSIBLE(hcd)) {
- size -= scnprintf(next, size,
- "SUSPENDED (no register access)\n");
- goto done;
- }
-
- admhc_dump_status(ahcd, &next, &size);
-
- /* other registers mostly affect frame timings */
- rdata = admhc_readl(ahcd, ®s->fminterval);
- temp = scnprintf(next, size,
- "fmintvl 0x%08x %sFSLDP=0x%04x FI=0x%04x\n",
- rdata, (rdata & ADMHC_SFI_FIT) ? "FIT " : "",
- (rdata >> ADMHC_SFI_FSLDP_SHIFT) & ADMHC_SFI_FSLDP_MASK,
- rdata & ADMHC_SFI_FI_MASK);
- size -= temp;
- next += temp;
-
- rdata = admhc_readl(ahcd, ®s->fmnumber);
- temp = scnprintf(next, size, "fmnumber 0x%08x %sFR=0x%04x FN=%04x\n",
- rdata, (rdata & ADMHC_SFN_FRT) ? "FRT " : "",
- (rdata >> ADMHC_SFN_FR_SHIFT) & ADMHC_SFN_FR_MASK,
- rdata & ADMHC_SFN_FN_MASK);
- size -= temp;
- next += temp;
-
- /* TODO: use predefined bitmask */
- rdata = admhc_readl(ahcd, ®s->lsthresh);
- temp = scnprintf(next, size, "lsthresh 0x%04x\n",
- rdata & 0x3fff);
- size -= temp;
- next += temp;
-
- temp = scnprintf(next, size, "hub poll timer: %s\n",
- admhcd_to_hcd(ahcd)->poll_rh ? "ON" : "OFF");
- size -= temp;
- next += temp;
-
- /* roothub */
- admhc_dump_roothub(ahcd, 1, &next, &size);
-
-done:
- spin_unlock_irqrestore(&ahcd->lock, flags);
- return PAGE_SIZE - size;
-}
-
-
-static struct debug_buffer *alloc_buffer(struct admhcd *ahcd,
- ssize_t (*fill_func)(struct debug_buffer *))
-{
- struct debug_buffer *buf;
-
- buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL);
-
- if (buf) {
- buf->ahcd = ahcd;
- buf->fill_func = fill_func;
- mutex_init(&buf->mutex);
- }
-
- return buf;
-}
-
-static int fill_buffer(struct debug_buffer *buf)
-{
- int ret = 0;
-
- if (!buf->page)
- buf->page = (char *)get_zeroed_page(GFP_KERNEL);
-
- if (!buf->page) {
- ret = -ENOMEM;
- goto out;
- }
-
- ret = buf->fill_func(buf);
-
- if (ret >= 0) {
- buf->count = ret;
- ret = 0;
- }
-
-out:
- return ret;
-}
-
-static ssize_t debug_output(struct file *file, char __user *user_buf,
- size_t len, loff_t *offset)
-{
- struct debug_buffer *buf = file->private_data;
- int ret = 0;
-
- mutex_lock(&buf->mutex);
- if (buf->count == 0) {
- ret = fill_buffer(buf);
- if (ret != 0) {
- mutex_unlock(&buf->mutex);
- goto out;
- }
- }
- mutex_unlock(&buf->mutex);
-
- ret = simple_read_from_buffer(user_buf, len, offset,
- buf->page, buf->count);
-
-out:
- return ret;
-}
-
-static int debug_close(struct inode *inode, struct file *file)
-{
- struct debug_buffer *buf = file->private_data;
-
- if (buf) {
- if (buf->page)
- free_page((unsigned long)buf->page);
- kfree(buf);
- }
-
- return 0;
-}
-
-static int debug_async_open(struct inode *inode, struct file *file)
-{
- file->private_data = alloc_buffer(inode->i_private, fill_async_buffer);
-
- return file->private_data ? 0 : -ENOMEM;
-}
-
-static int debug_periodic_open(struct inode *inode, struct file *file)
-{
- file->private_data = alloc_buffer(inode->i_private,
- fill_periodic_buffer);
-
- return file->private_data ? 0 : -ENOMEM;
-}
-
-static int debug_registers_open(struct inode *inode, struct file *file)
-{
- file->private_data = alloc_buffer(inode->i_private,
- fill_registers_buffer);
-
- return file->private_data ? 0 : -ENOMEM;
-}
-
-static inline void create_debug_files(struct admhcd *ahcd)
-{
- struct usb_bus *bus = &admhcd_to_hcd(ahcd)->self;
-
- ahcd->debug_dir = debugfs_create_dir(bus->bus_name, admhc_debug_root);
- if (!ahcd->debug_dir)
- goto dir_error;
-
- ahcd->debug_async = debugfs_create_file("async", S_IRUGO,
- ahcd->debug_dir, ahcd,
- &debug_async_fops);
- if (!ahcd->debug_async)
- goto async_error;
-
- ahcd->debug_periodic = debugfs_create_file("periodic", S_IRUGO,
- ahcd->debug_dir, ahcd,
- &debug_periodic_fops);
- if (!ahcd->debug_periodic)
- goto periodic_error;
-
- ahcd->debug_registers = debugfs_create_file("registers", S_IRUGO,
- ahcd->debug_dir, ahcd,
- &debug_registers_fops);
- if (!ahcd->debug_registers)
- goto registers_error;
-
- admhc_dbg(ahcd, "created debug files\n");
- return;
-
-registers_error:
- debugfs_remove(ahcd->debug_periodic);
-periodic_error:
- debugfs_remove(ahcd->debug_async);
-async_error:
- debugfs_remove(ahcd->debug_dir);
-dir_error:
- ahcd->debug_periodic = NULL;
- ahcd->debug_async = NULL;
- ahcd->debug_dir = NULL;
-}
-
-static inline void remove_debug_files(struct admhcd *ahcd)
-{
- debugfs_remove(ahcd->debug_registers);
- debugfs_remove(ahcd->debug_periodic);
- debugfs_remove(ahcd->debug_async);
- debugfs_remove(ahcd->debug_dir);
-}
-
-#endif
-
-/*-------------------------------------------------------------------------*/
projects / openwrt / svn-archive / archive.git / blobdiff