diff options
Diffstat (limited to 'target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-dbg.c')
| -rw-r--r-- | target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-dbg.c | 836 |
1 files changed, 836 insertions, 0 deletions
diff --git a/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-dbg.c b/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-dbg.c new file mode 100644 index 0000000..2d5dc2a --- /dev/null +++ b/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-dbg.c @@ -0,0 +1,836 @@ +/* + * 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 + +/*-------------------------------------------------------------------------*/ |