OpenWrt – Rev 1
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/*
* 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
/*-------------------------------------------------------------------------*/