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usb: add a USB_TRACE() debugging mechanism

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This commit is contained in:
Lephe 2022-12-03 11:04:43 +01:00
parent feb74a38ec
commit 177879d432
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GPG key ID: 1BBA026E13FC0495
3 changed files with 34 additions and 12 deletions
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21
include/gint/usb.h
View file

@ -269,27 +269,28 @@ int usb_commit_sync_timeout(int pipe, timeout_t const *timeout);
int usb_commit_async(int pipe, gint_call_t callback);
//---
// USB debugging log
// USB debugging functions
//---
#ifdef GINT_USB_DEBUG
#define USB_LOG(...) usb_log(__VA_ARGS__)
#define USB_TRACE(...) usb_trace(__VA_ARGS__)
/* usb_set_log(): Set the logging function for the USB driver
The USB driver can produce logs, which are mostly useful to troubleshoot
problems and add new protocols. The logging is disabled by default but can
be enabled by specifying this function.
It is up to you whether to store that in a buffer, rotate logs, send them to
storage memory or a console on the PC. */
/* usb_set_log(): Set the logging function for the USB driver */
void usb_set_log(void (*logger)(char const *format, va_list args));
/* usb_log(): Send a message to the USB log */
void usb_log(char const *format, ...);
/* usb_set_trace(): Set the tracing function for the USB driver
The function is called atomically, thus cannot be interrupted, therefore it
is safe to call usb_trace() in interrupt handlers. */
void usb_set_trace(void (*tracer)(char const *message));
/* usb_trace(): Trace the current state of the driver */
void usb_trace(char const *message);
#else
#define USB_LOG(...) do {} while(0)
#define USB_TRACE(...) do {} while(0)
#endif
//---

6
src/usb/pipes.c
View file

@ -224,6 +224,8 @@ static void finish_transfer(struct transfer volatile *t, int pipe)
if(pipe) USB.BEMPENB.word &= ~(1 << pipe);
if(t->callback.function) gint_call(t->callback);
USB_TRACE("finish_transfer()");
}
/* finish_round(): Update transfer logic after a write round completes
@ -252,6 +254,8 @@ static void finish_round(struct transfer volatile *t, int pipe)
t->data = NULL;
if(t->callback.function) gint_call(t->callback);
}
USB_TRACE("finish_round()");
}
/* write_round(): Write up to a FIFO's worth of data to a pipe
@ -304,6 +308,8 @@ static void write_round(struct transfer volatile *t, int pipe)
if(t->unit_size == 4) write_32(t->data, size >> 2, FIFO);
if(partial) finish_round(t, pipe);
}
USB_TRACE("write_round()");
}
int usb_write_async(int pipe, void const *data, int size, int unit_size,

19
src/usb/usb.c
View file

@ -6,6 +6,7 @@
#include <gint/drivers/states.h>
#include <gint/clock.h>
#include <gint/intc.h>
#include <gint/cpu.h>
#include "usb_private.h"
#define USB SH7305_USB
@ -27,10 +28,11 @@ static gint_call_t usb_open_callback = GINT_CALL_NULL;
static bool volatile usb_open_status = false;
//---
// Logging system
// Debugging functions
//---
static void (*usb_logger)(char const *format, va_list args) = NULL;
static void (*usb_tracer)(char const *message) = NULL;
void usb_set_log(void (*logger)(char const *format, va_list args))
{
@ -40,13 +42,26 @@ void usb_set_log(void (*logger)(char const *format, va_list args))
void usb_log(char const *format, ...)
{
if(!usb_logger) return;
va_list args;
va_start(args, format);
usb_logger(format, args);
va_end(args);
}
void usb_set_trace(void (*tracer)(char const *message))
{
usb_tracer = tracer;
}
void usb_trace(char const *message)
{
if(usb_tracer) {
cpu_atomic_start();
usb_tracer(message);
cpu_atomic_end();
}
}
//---
// Module powering and depowering
//---