/*
* Copyright (c) 2009 by Martin Fuzzey
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* this file is part of imx21-hcd.c */
#ifdef CONFIG_DYNAMIC_DEBUG
#define DEBUG
#endif
#ifndef DEBUG
static inline void create_debug_files(struct imx21 *imx21) { }
static inline void remove_debug_files(struct imx21 *imx21) { }
static inline void debug_urb_submitted(struct imx21 *imx21, struct urb *urb) {}
static inline void debug_urb_completed(struct imx21 *imx21, struct urb *urb,
int status) {}
static inline void debug_urb_unlinked(struct imx21 *imx21, struct urb *urb) {}
static inline void debug_urb_queued_for_etd(struct imx21 *imx21,
struct urb *urb) {}
static inline void debug_urb_queued_for_dmem(struct imx21 *imx21,
struct urb *urb) {}
static inline void debug_etd_allocated(struct imx21 *imx21) {}
static inline void debug_etd_freed(struct imx21 *imx21) {}
static inline void debug_dmem_allocated(struct imx21 *imx21, int size) {}
static inline void debug_dmem_freed(struct imx21 *imx21, int size) {}
static inline void debug_isoc_submitted(struct imx21 *imx21,
int frame, struct td *td) {}
static inline void debug_isoc_completed(struct imx21 *imx21,
int frame, struct td *td, int cc, int len) {}
#else
#include <linux/debugfs.h>
#include <linux/seq_file.h>
static const char *dir_labels[] = {
"TD 0",
"OUT",
"IN",
"TD 1"
};
static const char *speed_labels[] = {
"Full",
"Low"
};
static const char *format_labels[] = {
"Control",
"ISO",
"Bulk",
"Interrupt"
};
static inline struct debug_stats *stats_for_urb(struct imx21 *imx21,
struct urb *urb)
{
return usb_pipeisoc(urb->pipe) ?
&imx21->isoc_stats : &imx21->nonisoc_stats;
}
static void debug_urb_submitted(struct imx21 *imx21, struct urb *urb)
{
stats_for_urb(imx21, urb)->submitted++;
}
static void debug_urb_completed(struct imx21 *imx21, struct urb *urb, int st)
{
if (st)
stats_for_urb(imx21, urb)->completed_failed++;
else
stats_for_urb(imx21, urb)->completed_ok++;
}
static void debug_urb_unlinked(struct imx21 *imx21, struct urb *urb)
{
stats_for_urb(imx21, urb)->unlinked++;
}
static void debug_urb_queued_for_etd(struct imx21 *imx21, struct urb *urb)
{
stats_for_urb(imx21, urb)->queue_etd++;
}
static void debug_urb_queued_for_dmem(struct imx21 *imx21, struct urb *urb)
{
stats_for_urb(imx21, urb)->queue_dmem++;
}
static inline void debug_etd_allocated(struct imx21 *imx21)
{
imx21->etd_usage.maximum = max(
++(imx21->etd_usage.value),
imx21->etd_usage.maximum);
}
static inline void debug_etd_freed(struct imx21 *imx21)
{
imx21->etd_usage.value--;
}
static inline void debug_dmem_allocated(struct imx21 *imx21, int size)
{
imx21->dmem_usage.value += size;
imx21->dmem_usage.maximum = max(
imx21->dmem_usage.value,
imx21->dmem_usage.maximum);
}
static inline void debug_dmem_freed(struct imx21 *imx21, int size)
{
imx21->dmem_usage.value -= size;
}
static void debug_isoc_submitted(struct imx21 *imx21,
int frame, struct td *td)
{
struct debug_isoc_trace *trace = &imx21->isoc_trace[
imx21->isoc_trace_index++];
imx21->isoc_trace_index %= ARRAY_SIZE(imx21->isoc_trace);
trace->schedule_frame = td->frame;
trace->submit_frame = frame;
trace->request_len = td->len;
trace->td = td;
}
static inline void debug_isoc_completed(struct imx21 *imx21,
int frame, struct td *td, int cc, int len)
{
struct debug_isoc_trace *trace, *trace_failed;
int i;
int found = 0;
trace = imx21->isoc_trace;
for (i = 0; i < ARRAY_SIZE(imx21->isoc_trace); i++, trace++) {
if (trace->td == td) {
trace->done_frame = frame;
trace->done_len = len;
trace->cc = cc;
trace->td = NULL;
found = 1;
break;
}
}
if (found && cc) {
trace_failed = &imx21->isoc_trace_failed[
imx21->isoc_trace_index_failed++];
imx21->isoc_trace_index_failed %= ARRAY_SIZE(
imx21->isoc_trace_failed);
*trace_failed = *trace;
}
}
static char *format_ep(struct usb_host_endpoint *ep, char *buf, int bufsize)
{
if (ep)
snprintf(buf, bufsize, "ep_%02x (type:%02X kaddr:%p)",
ep->desc.bEndpointAddress,
usb_endpoint_type(&ep->desc),
ep);
else
snprintf(buf, bufsize, "none");
return buf;
}
static char *format_etd_dword0(u32 value, char *buf, int bufsize)
{
snprintf(buf, bufsize,
"addr=%d ep=%d dir=%s speed=%s format=%s halted=%d",
value & 0x7F,
(value >> DW0_ENDPNT) & 0x0F,
dir_labels[(value >> DW0_DIRECT) & 0x03],
speed_labels[(value >> DW0_SPEED) & 0x01],
format_labels[(value >> DW0_FORMAT) & 0x03],
(value >> DW0_HALTED) & 0x01);
return buf;
}
static int debug_status_show(struct seq_file *s, void *v)
{
struct imx21 *imx21 = s->private;
int etds_allocated = 0;
int etds_sw_busy = 0;
int etds_hw_busy = 0;
int dmem_blocks = 0;
int queued_for_etd = 0;
int queued_for_dmem = 0;
unsigned int dmem_bytes = 0;
int i;
struct etd_priv *etd;
u32 etd_enable_mask;
unsigned long flags;
struct imx21_dmem_area *dmem;
struct ep_priv *ep_priv;
spin_lock_irqsave(&imx21->lock, flags);
etd_enable_mask = readl(imx21->regs + USBH_ETDENSET);
for (i = 0, etd = imx21->etd; i < USB_NUM_ETD; i++, etd++) {
if (etd->alloc)
etds_allocated++;
if (etd->urb)
etds_sw_busy++;
if (etd_enable_mask & (1<<i))
etds_hw_busy++;
}
list_for_each_entry(dmem, &imx21->dmem_list, list) {
dmem_bytes += dmem->size;
dmem_blocks++;
}
list_for_each_entry(ep_priv, &imx21->queue_for_etd, queue)
queued_for_etd++;
list_for_each_entry(etd, &imx21->queue_for_dmem, queue)
queued_for_dmem++;
spin_unlock_irqrestore(&imx21->lock, flags);
seq_printf(s,
"Frame: %d\n"
"ETDs allocated: %d/%d (max=%d)\n"
"ETDs in use sw: %d\n"
"ETDs in use hw: %d\n"
"DMEM allocated: %d/%d (max=%d)\n"
"DMEM blocks: %d\n"
"Queued waiting for ETD: %d\n"
"Queued waiting for DMEM: %d\n",
readl(imx21->regs + USBH_FRMNUB) & 0xFFFF,
etds_allocated, USB_NUM_ETD, imx21->etd_usage.maximum,
etds_sw_busy,
etds_hw_busy,
dmem_bytes, DMEM_SIZE, imx21->dmem_usage.maximum,
dmem_blocks,
queued_for_etd,
queued_for_dmem);
return 0;
}
static int debug_dmem_show(struct seq_file *s, void *v)
{
struct imx21 *imx21 = s->private;
struct imx21_dmem_area *dmem;
unsigned long flags;
char ep_text[40];
spin_lock_irqsave(&imx21->lock, flags);
list_for_each_entry(dmem, &imx21->dmem_list, list)
seq_printf(s,
"%04X: size=0x%X "
"ep=%s\n",
dmem->offset, dmem->size,
format_ep(dmem->ep, ep_text, sizeof(ep_text)));
spin_unlock_irqrestore(&imx21->lock, flags);
return 0;
}
static int debug_etd_show(struct seq_file *s, void *v)
{
struct imx21 *imx21 = s->private;
struct etd_priv *etd;
char buf[60];
u32 dword;
int i, j;
unsigned long flags;
spin_lock_irqsave(&imx21->lock, flags);
for (i = 0, etd = imx21->etd; i < USB_NUM_ETD; i++, etd++) {
int state = -1;
struct urb_priv *urb_priv;
if (etd->urb) {
urb_priv = etd->urb->hcpriv;
if (urb_priv)
state = urb_priv->state;
}
seq_printf(s,
"etd_num: %d\n"
"ep: %s\n"
"alloc: %d\n"
"len: %d\n"
"busy sw: %d\n"
"busy hw: %d\n"
"urb state: %d\n"
"current urb: %p\n",
i,
format_ep(etd->ep, buf, sizeof(buf)),
etd->alloc,
etd->len,
etd->urb != NULL,
(readl(imx21->regs + USBH_ETDENSET) & (1 << i)) > 0,
state,
etd->urb);
for (j = 0; j < 4; j++) {
dword = etd_readl(imx21, i, j);
switch (j) {
case 0:
format_etd_dword0(dword, buf, sizeof(buf));
break;
case 2:
snprintf(buf, sizeof(buf),
"cc=0X%02X", dword >> DW2_COMPCODE);
break;
default:
*buf = 0;
break;
}
seq_printf(s,
"dword %d: submitted=%08X cur=%08X [%s]\n",
j,
etd->submitted_dwords[j],
dword,
buf);
}
seq_printf(s, "\n");
}
spin_unlock_irqrestore(&imx21->lock, flags);
return 0;
}
static void debug_statistics_show_one(struct seq_file *s,
const char *name, struct debug_stats *stats)
{
seq_printf(s, "%s:\n"
"submitted URBs: %lu\n"
"completed OK: %lu\n"
"completed failed: %lu\n"
"unlinked: %lu\n"
"queued for ETD: %lu\n"
"queued for DMEM: %lu\n\n",
name,
stats->submitted,
stats->completed_ok,
stats->completed_failed,
stats->unlinked,
stats->queue_etd,
stats->queue_dmem);
}
static int debug_statistics_show(struct seq_file *s, void *v)
{
struct imx21 *imx21 = s->private;
unsigned long flags;
spin_lock_irqsave(&imx21->lock, flags);
debug_statistics_show_one(s, "nonisoc", &imx21->nonisoc_stats);
debug_statistics_show_one(s, "isoc", &imx21->isoc_stats);
seq_printf(s, "unblock kludge triggers: %lu\n", imx21->debug_unblocks);
spin_unlock_irqrestore(&imx21->lock, flags);
return 0;
}
static void debug_isoc_show_one(struct seq_file *s,
const char *name, int index, struct debug_isoc_trace *trace)
{
seq_printf(s, "%s %d:\n"
"cc=0X%02X\n"
"scheduled frame %d (%d)\n"
"submitted frame %d (%d)\n"
"completed frame %d (%d)\n"
"requested length=%d\n"
"completed length=%d\n\n",
name, index,
trace->cc,
trace->schedule_frame, trace->schedule_frame & 0xFFFF,
trace->submit_frame, trace->submit_frame & 0xFFFF,
trace->done_frame, trace->done_frame & 0xFFFF,
trace->request_len,
trace->done_len);
}
static int debug_isoc_show(struct seq_file *s, void *v)
{
struct imx21 *imx21 = s->private;
struct debug_isoc_trace *trace;
unsigned long flags;
int i;
spin_lock_irqsave(&imx21->lock, flags);
trace = imx21->isoc_trace_failed;
for (i = 0; i < ARRAY_SIZE(imx21->isoc_trace_failed); i++, trace++)
debug_isoc_show_one(s, "isoc failed", i, trace);
trace = imx21->isoc_trace;
for (i = 0; i < ARRAY_SIZE(imx21->isoc_trace); i++, trace++)
debug_isoc_show_one(s, "isoc", i, trace);
spin_unlock_irqrestore(&imx21->lock, flags);
return 0;
}
static int debug_status_open(struct inode *inode, struct file *file)
{
return single_open(file, debug_status_show, inode->i_private);
}
static int debug_dmem_open(struct inode *inode, struct file *file)
{
return single_open(file, debug_dmem_show, inode->i_private);
}
static int debug_etd_open(struct inode *inode, struct file *file)
{
return single_open(file, debug_etd_show, inode->i_private);
}
static int debug_statistics_open(struct inode *inode, struct file *file)
{
return single_open(file, debug_statistics_show, inode->i_private);
}
static int debug_isoc_open(struct inode *inode, struct file *file)
{
return single_open(file, debug_isoc_show, inode->i_private);
}
static const struct file_operations debug_status_fops = {
.open = debug_status_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static const struct file_operations debug_dmem_fops = {
.open = debug_dmem_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static const struct file_operations debug_etd_fops = {
.open = debug_etd_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static const struct file_operations debug_statistics_fops = {
.open = debug_statistics_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static const struct file_operations debug_isoc_fops = {
.open = debug_isoc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static void create_debug_files(struct imx21 *imx21)
{
imx21->debug_root = debugfs_create_dir(dev_name(imx21->dev), NULL);
if (!imx21->debug_root)
goto failed_create_rootdir;
if (!debugfs_create_file("status", S_IRUGO,
imx21->debug_root, imx21, &debug_status_fops))
goto failed_create;
if (!debugfs_create_file("dmem", S_IRUGO,
imx21->debug_root, imx21, &debug_dmem_fops))
goto failed_create;
if (!debugfs_create_file("etd", S_IRUGO,
imx21->debug_root, imx21, &debug_etd_fops))
goto failed_create;
if (!debugfs_create_file("statistics", S_IRUGO,
imx21->debug_root, imx21, &debug_statistics_fops))
goto failed_create;
if (!debugfs_create_file("isoc", S_IRUGO,
imx21->debug_root, imx21, &debug_isoc_fops))
goto failed_create;
return;
failed_create:
debugfs_remove_recursive(imx21->debug_root);
failed_create_rootdir:
imx21->debug_root = NULL;
}
static void remove_debug_files(struct imx21 *imx21)
{
if (imx21->debug_root) {
debugfs_remove_recursive(imx21->debug_root);
imx21->debug_root = NULL;
}
}
#endif
