/*
- * OHCI HCD (Host Controller Driver) for USB.
+ * ADM5120 HCD (Host Controller Driver) for USB
*
- * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
- * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
+ * 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.
*
- * This file is licenced under the GPL.
*/
/*-------------------------------------------------------------------------*/
-#ifdef DEBUG
+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";
+}
-#define edstring(ed_type) ({ char *temp; \
- switch (ed_type) { \
- case PIPE_CONTROL: temp = "ctrl"; break; \
- case PIPE_BULK: temp = "bulk"; break; \
- case PIPE_INTERRUPT: temp = "intr"; break; \
- default: temp = "isoc"; break; \
- }; temp;})
-#define pipestring(pipe) edstring(usb_pipetype(pipe))
+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 urb * urb, char * str, int small)
+urb_print(struct admhcd *ahcd, struct urb *urb, char *str, int small, int status)
{
- unsigned int pipe= urb->pipe;
+ unsigned int pipe = urb->pipe;
if (!urb->dev || !urb->dev->bus) {
- dbg("%s URB: no dev", str);
+ admhc_dbg(ahcd, "%s URB: no dev", str);
return;
}
#ifndef ADMHC_VERBOSE_DEBUG
- if (urb->status != 0)
+ if (status != 0)
#endif
- dbg("%s %p dev=%d ep=%d%s-%s flags=%x len=%d/%d stat=%d",
- 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,
- urb->status);
+ 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)) {
- printk(KERN_DEBUG __FILE__ ": setup(8):");
+ admhc_dbg(ahcd, "setup(8):");
for (i = 0; i < 8 ; i++)
- printk (" %02x", ((__u8 *) urb->setup_packet) [i]);
- printk ("\n");
+ printk(KERN_INFO" %02x", ((__u8 *)urb->setup_packet)[i]);
+ printk(KERN_INFO "\n");
}
if (urb->transfer_buffer_length > 0 && urb->transfer_buffer) {
- printk(KERN_DEBUG __FILE__ ": data(%d/%d):",
+ admhc_dbg(ahcd, "data(%d/%d):",
urb->actual_length,
urb->transfer_buffer_length);
- len = usb_pipeout(pipe)?
- urb->transfer_buffer_length: urb->actual_length;
+ len = usb_pipeout(pipe) ?
+ urb->transfer_buffer_length : urb->actual_length;
for (i = 0; i < 16 && i < len; i++)
- printk (" %02x", ((__u8 *) urb->transfer_buffer) [i]);
- printk ("%s stat:%d\n", i < len? "...": "", urb->status);
+ 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 ); \
+ 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)
+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\n",
+ 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_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)
+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)
+static char *buss2string(int state)
{
switch (state) {
case ADMHC_BUSS_RESET:
case ADMHC_BUSS_SUSPEND:
return "suspend";
}
- return "(bad state)";
+ return "?state";
}
static void
admhc_dbg_sw(ahcd, next, size,
"host_control 0x%08x BUSS=%s%s\n",
temp,
- buss2string (temp & ADMHC_HC_BUSS),
+ buss2string(temp & ADMHC_HC_BUSS),
(temp & ADMHC_HC_DMAE) ? " DMAE" : ""
);
admhc_readl(ahcd, ®s->hosthead), next, size);
}
-#define dbg_port_sw(hc,num,value,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", \
{
u32 temp, i;
- temp = admhc_get_rhdesc(ahcd);
+ temp = admhc_read_rhdesc(ahcd);
if (temp == ~(u32)0)
return;
}
for (i = 0; i < ahcd->num_ports; i++) {
- temp = admhc_get_portstatus(ahcd, i);
+ temp = admhc_read_portstatus(ahcd, i);
dbg_port_sw(ahcd, i, temp, next, size);
}
}
/* dumps some of the state we know about */
admhc_dump_status(ahcd, NULL, NULL);
- admhc_dbg(ahcd,"current frame #%04x\n",
+ admhc_dbg(ahcd, "current frame #%04x\n",
admhc_frame_no(ahcd));
admhc_dump_roothub(ahcd, verbose, NULL, NULL);
static void admhc_dump_td(const struct admhcd *ahcd, const char *label,
const struct td *td)
{
- u32 tmp = hc32_to_cpup(ahcd, &td->hwINFO);
+ 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));
- if ((td->flags & TD_FLAG_ISO) == 0) {
- const char *toggle, *pid;
-
- switch (tmp & TD_T) {
- case TD_T_DATA0: toggle = data0; break;
- case TD_T_DATA1: toggle = data1; break;
- case TD_T_CARRY: toggle = "CARRY"; break;
- default: toggle = "(bad toggle)"; break;
- }
- switch (tmp & TD_DP) {
- case TD_DP_SETUP: pid = "SETUP"; break;
- case TD_DP_IN: pid = "IN"; break;
- case TD_DP_OUT: pid = "OUT"; break;
- default: pid = "(bad pid)"; break;
- }
- 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),
- toggle,
- pid,
- TD_ISI_GET(tmp),
- TD_FN_GET(tmp));
- } else {
-#if 0 /* TODO: remove */
- unsigned i;
- admhc_dbg(ahcd, " info %08x CC=%x FC=%d DI=%d SF=%04x\n", tmp,
- TD_CC_GET(tmp),
- (tmp >> 24) & 0x07,
- (tmp & TD_DI) >> 21,
- tmp & 0x0000ffff);
- admhc_dbg(ahcd, " bp0 %08x be %08x\n",
- hc32_to_cpup (ahcd, &td->hwCBP) & ~0x0fff,
- hc32_to_cpup (ahcd, &td->hwBE));
-#endif
- }
+ 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),
+ hc32_to_cpup(ahcd, &td->hwDBP),
tmp,
TD_BL_GET(tmp),
- (tmp & TD_IE) ? " IE" : ""
- );
+ (tmp & TD_IE) ? " IE" : "");
}
/* caller MUST own hcd spinlock if verbose is set! */
{
u32 tmp = hc32_to_cpu(ahcd, ed->hwINFO);
- admhc_dbg(ahcd, "%s ed %p state 0x%x type %s; next ed %08x\n",
+ admhc_dbg(ahcd, "%s ed %p %s type %s; next ed %08x\n",
label,
- ed, ed->state, edstring (ed->type),
- hc32_to_cpup (ahcd, &ed->hwNextED));
+ 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 = 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),
+ hc32_to_cpup(ahcd, &ed->hwTailP),
(tmp & ED_C) ? data1 : data0,
(tmp & ED_H) ? " HALT" : "",
verbose ? " td list follows" : " (not listing)");
list_for_each(tmp, &ed->td_list) {
struct td *td;
td = list_entry(tmp, struct td, td_list);
- admhc_dump_td (ahcd, " ->", td);
+ admhc_dump_td(ahcd, " ->", td);
}
}
}
#else /* ifdef DEBUG */
-static inline void urb_print(struct urb * urb, char * str, int small) {}
+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
#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, size = count;
+ unsigned temp;
+ unsigned size = count;
if (!ed)
return 0;
-#if 0
- /* print first --> last */
- while (ed->ed_prev)
- ed = ed->ed_prev;
-#endif
-
/* 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 %cs dev%d ep%d %s%smax %d %08x%s%s %s",
+ "ed/%p %s %s %cs dev%d ep%d %s%smax %d %08x%s%s %s"
+ " h:%08x t:%08x",
ed,
- edstring (ed->type),
+ 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,
(info & ED_SKIP) ? " S" : "",
(headp & ED_H) ? " H" : "",
- (headp & ED_C) ? data1 : data0);
+ (headp & ED_C) ? data1 : data0,
+ headp & ED_MASK, tailp);
size -= temp;
buf += temp;
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);
+ 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)",
+ "\n\ttd/%p %s %d %s%scc=%x urb %p (%08x,%08x)",
td,
- ({ char *pid;
- switch (info & TD_DP) {
- case TD_DP_SETUP: pid = "setup"; break;
- case TD_DP_IN: pid = "in"; break;
- case TD_DP_OUT: pid = "out"; break;
- default: pid = "(bad pid)"; break;
- } pid;}),
+ td_pidstring(info),
TD_BL_GET(cbl),
(info & TD_OWN) ? "" : "DONE ",
(cbl & TD_IE) ? "IE " : "",
- TD_CC_GET (info), td->urb, info, cbl);
+ TD_CC_GET(info), td->urb, info, cbl);
size -= temp;
buf += temp;
}
ed = ed->ed_next;
}
+
return count - size;
}
-static ssize_t
-show_async(struct class_device *class_dev, char *buf)
+static ssize_t fill_async_buffer(struct debug_buffer *buf)
{
- struct usb_bus *bus;
- struct usb_hcd *hcd;
struct admhcd *ahcd;
size_t temp;
unsigned long flags;
- bus = class_get_devdata(class_dev);
- hcd = bus_to_hcd(bus);
- ahcd = hcd_to_admhcd(hcd);
+ ahcd = buf->ahcd;
- /* display control and bulk lists together, for simplicity */
spin_lock_irqsave(&ahcd->lock, flags);
-#if 0
- temp = show_list (ahcd, buf, PAGE_SIZE, ahcd->ed_tails[ED_TAIL_CONTROL]);
- temp += show_list (ahcd, buf + temp, PAGE_SIZE - temp,
- ahcd->ed_tails[ED_TAIL_BULK]);
-#else
-#ifdef ED_TAIL_ARRAY
- temp = show_list(ahcd, buf, PAGE_SIZE, ahcd->ed_head);
-#else
- temp = show_list(ahcd, buf, PAGE_SIZE, ahcd->ed_head);
-#endif
-#endif
+ temp = show_list(ahcd, buf->page, PAGE_SIZE, ahcd->ed_head);
spin_unlock_irqrestore(&ahcd->lock, flags);
return temp;
}
-static CLASS_DEVICE_ATTR(async, S_IRUGO, show_async, NULL);
#define DBG_SCHED_LIMIT 64
-static ssize_t
-show_periodic(struct class_device *class_dev, char *buf)
+static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
{
- struct usb_bus *bus;
- struct usb_hcd *hcd;
struct admhcd *ahcd;
struct ed **seen, *ed;
unsigned long flags;
char *next;
unsigned i;
- if (!(seen = kmalloc(DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC)))
+ seen = kmalloc(DBG_SCHED_LIMIT * sizeof(*seen), GFP_ATOMIC);
+ if (!seen)
return 0;
seen_count = 0;
- bus = class_get_devdata(class_dev);
- hcd = bus_to_hcd(bus);
- ahcd = hcd_to_admhcd(hcd);
- next = buf;
+ ahcd = buf->ahcd;
+ next = buf->page;
size = PAGE_SIZE;
temp = scnprintf(next, size, "size = %d\n", NUM_INTS);
/* dump a snapshot of the periodic schedule (and load) */
spin_lock_irqsave(&ahcd->lock, flags);
for (i = 0; i < NUM_INTS; i++) {
- if (!(ed = ahcd->periodic [i]))
+ ed = ahcd->periodic[i];
+ if (!ed)
continue;
- temp = scnprintf(next, size, "%2d [%3d]:", i, ahcd->load [i]);
+ temp = scnprintf(next, size, "%2d [%3d]:", i, ahcd->load[i]);
size -= temp;
next += temp;
size -= temp;
next += temp;
for (temp = 0; temp < seen_count; temp++) {
- if (seen [temp] == ed)
+ if (seen[temp] == ed)
break;
}
/* show more info the first time around */
if (temp == seen_count) {
- u32 info = hc32_to_cpu (ahcd, ed->hwINFO);
+ 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)
+ list_for_each(entry, &ed->td_list)
qlen++;
temp = scnprintf(next, size,
" (%cs dev%d ep%d%s qlen %u"
next += temp;
if (seen_count < DBG_SCHED_LIMIT)
- seen [seen_count++] = ed;
+ seen[seen_count++] = ed;
ed = ed->ed_next;
next += temp;
}
spin_unlock_irqrestore(&ahcd->lock, flags);
- kfree (seen);
+ kfree(seen);
return PAGE_SIZE - size;
}
-static CLASS_DEVICE_ATTR(periodic, S_IRUGO, show_periodic, NULL);
#undef DBG_SCHED_LIMIT
-static ssize_t
-show_registers(struct class_device *class_dev, char *buf)
+static ssize_t fill_registers_buffer(struct debug_buffer *buf)
{
- struct usb_bus *bus;
struct usb_hcd *hcd;
struct admhcd *ahcd;
struct admhcd_regs __iomem *regs;
char *next;
u32 rdata;
- bus = class_get_devdata(class_dev);
- hcd = bus_to_hcd(bus);
- ahcd = hcd_to_admhcd(hcd);
+ ahcd = buf->ahcd;
+ hcd = admhc_to_hcd(ahcd);
regs = ahcd->regs;
- next = buf;
+ next = buf->page;
size = PAGE_SIZE;
spin_lock_irqsave(&ahcd->lock, flags);
admhc_dbg_sw(ahcd, &next, &size,
"bus %s, device %s\n"
"%s\n"
- "%s version " DRIVER_VERSION "\n",
+ "%s\n",
hcd->self.controller->bus->name,
- hcd->self.controller->bus_id,
+ dev_name(hcd->self.controller),
hcd->product_desc,
hcd_name);
- if (bus->controller->power.power_state.event) {
+ if (!HCD_HW_ACCESSIBLE(hcd)) {
size -= scnprintf(next, size,
"SUSPENDED (no register access)\n");
goto done;
spin_unlock_irqrestore(&ahcd->lock, flags);
return PAGE_SIZE - size;
}
-static CLASS_DEVICE_ATTR(registers, S_IRUGO, show_registers, NULL);
-static inline void create_debug_files (struct admhcd *ahcd)
+static struct debug_buffer *alloc_buffer(struct admhcd *ahcd,
+ ssize_t (*fill_func)(struct debug_buffer *))
{
- struct class_device *cldev = admhcd_to_hcd(ahcd)->self.class_dev;
- int retval;
+ struct debug_buffer *buf;
- retval = class_device_create_file(cldev, &class_device_attr_async);
- retval = class_device_create_file(cldev, &class_device_attr_periodic);
- retval = class_device_create_file(cldev, &class_device_attr_registers);
- admhc_dbg(ahcd, "created debug files\n");
+ 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 inline void remove_debug_files (struct admhcd *ahcd)
+static ssize_t debug_output(struct file *file, char __user *user_buf,
+ size_t len, loff_t *offset)
{
- struct class_device *cldev = admhcd_to_hcd(ahcd)->self.class_dev;
+ 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);
- class_device_remove_file(cldev, &class_device_attr_async);
- class_device_remove_file(cldev, &class_device_attr_periodic);
- class_device_remove_file(cldev, &class_device_attr_registers);
+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 / openwrt.git / blobdiff