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/*
* Copyright (c) 2013, The Linux Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "bt_vendor_persist.h"
#ifdef BT_NV_SUPPORT
#ifdef BT_NV_SUPPORT_DL
#include <dlfcn.h>
// All figured out through investigation of this code...
typedef struct {
unsigned char bd_addr[6];
// This is a bit dangerous, but this struct
// is unknown (however not used outside of this context)
unsigned char unknown[58];
} nv_persist_item_type;
typedef enum {
NV_SUCCESS = 0,
} nv_persist_stat_enum_type;
#define TRUE 1
#define FALSE 0
#define NV_BD_ADDR_I 1
// ...except this, which was found through experimentation
#define NV_READ_F 0
#else
#include "bt_nv.h"
#endif
#define LOG_TAG "QCOM-BTNV"
#include <utils/Log.h>
/*===========================================================================
FUNCTION bt_vendor_nv_read
DESCRIPTION
Helper Routine to process the nv read command
DEPENDENCIES
NIL
RETURN VALUE
RETURN VALUE
FALSE = failure, else TRUE
SIDE EFFECTS
None
===========================================================================*/
uint8_t bt_vendor_nv_read
(
uint8_t nv_item,
uint8_t * rsp_buf
)
{
nv_persist_item_type my_nv_item;
nv_persist_stat_enum_type cmd_result;
boolean result = FALSE;
#ifdef BT_NV_SUPPORT_DL
int (*bt_nv_cmd)(int, int, nv_persist_item_type *, int);
void *lib = dlopen("libbtnv.so", RTLD_NOW);
if (!lib) {
ALOGE("Failed to open libbtnv.so: %s", dlerror());
return FALSE;
}
bt_nv_cmd = (int (*)(int, int, nv_persist_item_type *, int))dlsym(lib, "bt_nv_cmd");
if (!bt_nv_cmd) {
ALOGE("Failed to find bt_nv_cmd: %s", dlerror());
dlclose(lib);
return FALSE;
}
#endif
switch(nv_item)
{
case NV_BD_ADDR_I:
// A strange default parameter is used here. A debugger shows 4 parameters being passed.
cmd_result = (nv_persist_stat_enum_type)bt_nv_cmd(NV_READ_F, NV_BD_ADDR_I, &my_nv_item, 0);
ALOGI("CMD result: %d", cmd_result);
if (NV_SUCCESS != cmd_result)
{
ALOGE("Failed to read BD_ADDR from NV");
/* Send fail response */
result = FALSE;
}
else
{
/* copy bytes */
rsp_buf[0] = my_nv_item.bd_addr[0];
rsp_buf[1] = my_nv_item.bd_addr[1];
rsp_buf[2] = my_nv_item.bd_addr[2];
rsp_buf[3] = my_nv_item.bd_addr[3];
rsp_buf[4] = my_nv_item.bd_addr[4];
rsp_buf[5] = my_nv_item.bd_addr[5];
ALOGI("BD address read for NV_BD_ADDR_I: %.2x:%.2x:%.2x:%.2x:%.2x:%.2x",
(unsigned int) my_nv_item.bd_addr[0],(unsigned int) my_nv_item.bd_addr[1],
(unsigned int) my_nv_item.bd_addr[2],(unsigned int) my_nv_item.bd_addr[3],
(unsigned int) my_nv_item.bd_addr[4],(unsigned int) my_nv_item.bd_addr[5]);
result = TRUE;
}
break;
}
#ifdef BT_NV_SUPPORT_DL
dlclose(lib);
#endif
return result;
}
#endif /* End of BT_NV_SUPPORT */
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