diff options
Diffstat (limited to 'android/hw-control.c')
| -rw-r--r-- | android/hw-control.c | 204 |
1 files changed, 0 insertions, 204 deletions
diff --git a/android/hw-control.c b/android/hw-control.c deleted file mode 100644 index 681e85b..0000000 --- a/android/hw-control.c +++ /dev/null @@ -1,204 +0,0 @@ -/* Copyright (C) 2007-2008 The Android Open Source Project -** -** This software is licensed under the terms of the GNU General Public -** License version 2, as published by the Free Software Foundation, and -** may be copied, distributed, and modified under those terms. -** -** 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. -*/ - -/* this file implements the support of the new 'hardware control' - * qemud communication channel, which is used by libs/hardware on - * the system image to communicate with the emulator program for - * emulating the following: - * - * - power management - * - led(s) brightness - * - vibrator - * - flashlight - */ -#include "android/hw-control.h" -#include "cbuffer.h" -#include "android/qemud.h" -#include "android/utils/misc.h" -#include "android/utils/debug.h" -#include "qemu-char.h" -#include <stdio.h> -#include <string.h> - -#define D(...) VERBOSE_PRINT(hw_control,__VA_ARGS__) - -/* define T_ACTIVE to 1 to debug transport communications */ -#define T_ACTIVE 0 - -#if T_ACTIVE -#define T(...) VERBOSE_PRINT(hw_control,__VA_ARGS__) -#else -#define T(...) ((void)0) -#endif - -static void* hw_control_client; -static AndroidHwControlFuncs hw_control_funcs; - -#define BUFFER_SIZE 512 - -typedef struct { - CharDriverState* cs; - int overflow; - int wanted; - CBuffer input[1]; - char input_0[ BUFFER_SIZE ]; - /* note: 1 more byte to zero-terminate the query */ - char query[ BUFFER_SIZE+1 ]; -} HwControl; - -/* forward */ -static void hw_control_do_query( HwControl* h, - uint8_t* query, - int querylen ); - -static void -hw_control_init( HwControl* h, CharDriverState* cs ) -{ - h->cs = cs; - h->overflow = 0; - h->wanted = 0; - cbuffer_reset( h->input, h->input_0, sizeof h->input_0 ); -} - -static int -hw_control_can_read( void* _hw ) -{ - HwControl* h = _hw; - return cbuffer_write_avail( h->input ); -} - -static void -hw_control_read( void* _hw, const uint8_t* data, int len ) -{ - HwControl* h = _hw; - CBuffer* input = h->input; - - T("%s: %4d '%.*s'", __FUNCTION__, len, len, data); - - cbuffer_write( input, data, len ); - - while ( input->count > 0 ) - { - /* skip over unwanted data, if any */ - while (h->overflow > 0) { - uint8_t* dummy; - int avail = cbuffer_read_peek( input, &dummy ); - - if (avail == 0) - return; - - if (avail > h->overflow) - avail = h->overflow; - - cbuffer_read_step( input, avail ); - h->overflow -= avail; - } - - /* all incoming messages are made of a 4-byte hexchar sequence giving */ - /* the length of the following payload */ - if (h->wanted == 0) - { - char header[4]; - int len; - - if (input->count < 4) - return; - - cbuffer_read( input, header, 4 ); - len = hex2int( (uint8_t*)header, 4 ); - if (len >= 0) { - /* if the message is too long, skip it */ - if (len > input->size) { - T("%s: skipping oversized message (%d > %d)", - __FUNCTION__, len, input->size); - h->overflow = len; - } else { - T("%s: waiting for %d bytes", __FUNCTION__, len); - h->wanted = len; - } - } - } - else - { - if (input->count < h->wanted) - break; - - cbuffer_read( input, h->query, h->wanted ); - h->query[h->wanted] = 0; - hw_control_do_query( h, (uint8_t*)h->query, h->wanted ); - h->wanted = 0; - } - } -} - - -static uint8_t* -if_starts_with( uint8_t* buf, int buflen, const char* prefix ) -{ - int prefixlen = strlen(prefix); - - if (buflen < prefixlen || memcmp(buf, prefix, prefixlen)) - return NULL; - - return (uint8_t*)buf + prefixlen; -} - - -static void -hw_control_do_query( HwControl* h, - uint8_t* query, - int querylen ) -{ - uint8_t* q; - - D("%s: query %4d '%.*s'", __FUNCTION__, querylen, querylen, query ); - - q = if_starts_with( query, querylen, "power:light:brightness:" ); - if (q != NULL) { - if (hw_control_funcs.light_brightness) { - char* qq = strchr((const char*)q, ':'); - int value; - if (qq == NULL) { - D("%s: badly formatted", __FUNCTION__ ); - return; - } - *qq++ = 0; - value = atoi(qq); - hw_control_funcs.light_brightness( hw_control_client, (char*)q, value ); - } - return; - } -} - - -void -android_hw_control_init( void* opaque, const AndroidHwControlFuncs* funcs ) -{ - static CharDriverState* hw_control_cs; - static HwControl hwstate[1]; - - if (hw_control_cs == NULL) { - CharDriverState* cs; - if ( android_qemud_get_channel( ANDROID_QEMUD_CONTROL, &cs ) < 0 ) { - derror( "could not create hardware control charpipe" ); - exit(1); - } - - hw_control_cs = cs; - hw_control_init( hwstate, cs ); - qemu_chr_add_handlers( cs, hw_control_can_read, hw_control_read, NULL, hwstate ); - - D("%s: hw-control char pipe initialized", __FUNCTION__); - } - hw_control_client = opaque; - hw_control_funcs = funcs[0]; -} |