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/* Copyright 2014 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* USB serial console module */
#ifndef __CROS_EC_USB_CONSOLE_H
#define __CROS_EC_USB_CONSOLE_H
#if defined(CONFIG_USB_CONSOLE) || defined(CONFIG_USB_CONSOLE_STREAM)
#include <stdarg.h>
/**
* Put a null-terminated string to the USB console, like fputs().
*
* @return EC_SUCCESS, or non-zero if output was truncated.
*/
int usb_puts(const char *outstr);
/**
* Print formatted output to the USB console, like vprintf().
*
* See printf.h for valid formatting codes.
*
* @return EC_SUCCESS, or non-zero if output was truncated.
*/
int usb_vprintf(const char *format, va_list args);
/**
* Put a single character to the USB console, like putchar().
*
* @param c Character to put
* @return EC_SUCCESS, or non-zero if output was truncated.
*/
int usb_putc(int c);
/**
* Read a single character of input, similar to fgetc().
*
* @return the character, or -1 if no input waiting.
*/
int usb_getc(void);
/**
* Reset the usb console output crc32 accumulator.
*/
void usb_console_crc_init(void);
/**
* Get the current usb console output crc32 accumulator.
*/
uint32_t usb_console_crc(void);
/**
* Enable and Disable the USB console.
*
* By default the console is enabled, this should not be a problem since it
* is not accessible until the USB peripheral is also initialized, which can
* be delayed.
*/
void usb_console_enable(int enabled, int readonly);
/**
* Is USB TX queue blocked?
*
* Return 1, if USB console is enabled and USB TX Queue does not have enough
* space for the next packet.
* 0, otherwise.
*/
int usb_console_tx_blocked(void);
#define usb_va_start va_start
#define usb_va_end va_end
#else
#define usb_puts(x) EC_SUCCESS
#define usb_vprintf(x, y) EC_SUCCESS
#define usb_putc(x) EC_SUCCESS
#define usb_getc(x) (-1)
#define usb_va_start(x, y)
#define usb_va_end(x)
#define usb_console_tx_blocked() (0)
#endif
#endif /* __CROS_EC_USB_CONSOLE_H */
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