diff options
Diffstat (limited to 'android/hw-qemud.h')
| -rw-r--r-- | android/hw-qemud.h | 41 |
1 files changed, 13 insertions, 28 deletions
diff --git a/android/hw-qemud.h b/android/hw-qemud.h index 7101c2a..5b45a94 100644 --- a/android/hw-qemud.h +++ b/android/hw-qemud.h @@ -14,30 +14,8 @@ #include "qemu-common.h" -/* recent versions of the emulated Android system contains a background - * daemon, named 'qemud', which runs as root and opens /dev/ttyS0 - * - * its purpose is to multiplex several communication channels between - * the emulator and the system through a single serial port. - * - * each channel will be connected to a qemud-created unix socket on the - * system, and to either a emulated character device or other facility in - * the emulator. - * - * +--------> /dev/socket/qemud_gsm - * emulated GSM <-----+ ______|_ - * | emulated | | - * +====> /dev/ttyS0 <===>| qemud |------> /dev/socket/qemud_gps - * | |________| - * emulated GPS <-----+ | - * | +---------> other - * | - * other <--------------+ - * - * - * this is done to overcome specific permission problems, as well as to add various - * features that would require special kernel drivers otherwise even though they - * only need a simple character channel. +/* Support for the qemud-based 'services' in the emulator. + * Please read docs/ANDROID-QEMUD.TXT to understand what this is about. */ /* initialize the qemud support code in the emulator @@ -50,14 +28,21 @@ extern void android_qemud_init( void ); */ extern CharDriverState* android_qemud_get_cs( void ); -/* return the character driver state corresponding to a named qemud communication - * channel. this can be used to send/data the channel. +/* returns in '*pcs' a CharDriverState object that will be connected to + * a single client in the emulated system for a given named service. + * + * this is only used to connect GPS and GSM service clients to the + * implementation that requires a CharDriverState object for legacy + * reasons. + * * returns 0 on success, or -1 in case of error */ extern int android_qemud_get_channel( const char* name, CharDriverState* *pcs ); -/* set the character driver state for a given qemud communication channel. this - * is used to attach the channel to an external char driver device directly. +/* set an explicit CharDriverState object for a given qemud communication channel. this + * is used to attach the channel to an external char driver device (e.g. one + * created with "-serial <device>") directly. + * * returns 0 on success, -1 on error */ extern int android_qemud_set_channel( const char* name, CharDriverState* peer_cs ); |