src/include/console/usb.h

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2007 AMD
   5  * Written by Yinghai Lu <yinghai.lu@amd.com> for AMD.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; version 2 of the License.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 #ifndef _CONSOLE_USB_H_
  18 #define _CONSOLE_USB_H_
  19
  20 #include <rules.h>
  21 #include <stdint.h>
  22
  23 void usbdebug_init(void);
  24 int usbdebug_hw_init(bool force);
  25
  26 void usb_tx_byte(int idx, unsigned char data);
  27 void usb_tx_flush(int idx);
  28 unsigned char usb_rx_byte(int idx);
  29 int usb_can_rx_byte(int idx);
  30
  31 #define __CONSOLE_USB_ENABLE__  (IS_ENABLED(CONFIG_CONSOLE_USB) && \
  32         ((ENV_BOOTBLOCK && IS_ENABLED(CONFIG_USBDEBUG_IN_PRE_RAM)) || \
  33          (ENV_ROMSTAGE && IS_ENABLED(CONFIG_USBDEBUG_IN_PRE_RAM)) || \
  34          (ENV_POSTCAR && IS_ENABLED(CONFIG_USBDEBUG_IN_PRE_RAM)) || \
  35          ENV_RAMSTAGE))
  36
  37 #define USB_PIPE_FOR_CONSOLE 0
  38 #define USB_PIPE_FOR_GDB 0
  39
  40 #if __CONSOLE_USB_ENABLE__
  41 static inline void __usbdebug_init(void)        { usbdebug_init(); }
  42 static inline void __usb_tx_byte(u8 data)
  43 {
  44         usb_tx_byte(USB_PIPE_FOR_CONSOLE, data);
  45 }
  46 static inline void __usb_tx_flush(void) { usb_tx_flush(USB_PIPE_FOR_CONSOLE); }
  47 #else
  48 static inline void __usbdebug_init(void)        {}
  49 static inline void __usb_tx_byte(u8 data)       {}
  50 static inline void __usb_tx_flush(void) {}
  51 #endif
  52
  53 /*  */
  54 #if 0 && IS_ENABLED(CONFIG_GDB_STUB) && \
  55         ((ENV_ROMSTAGE && IS_ENABLED(CONFIG_USBDEBUG_IN_PRE_RAM)) \
  56          || ENV_RAMSTAGE)
  57 static inline void __gdb_hw_init(void)  { usbdebug_init(); }
  58 static inline void __gdb_tx_byte(u8 data)
  59 {
  60         usb_tx_byte(USB_PIPE_FOR_GDB, data);
  61 }
  62 static inline void __gdb_tx_flush(void) { usb_tx_flush(USB_PIPE_FOR_GDB); }
  63 static inline u8 __gdb_rx_byte(void)
  64 {
  65         return usb_rx_byte(USB_PIPE_FOR_GDB);
  66 }
  67 #endif
  68
  69 #endif /* _CONSOLE_USB_H_ */