diff options
Diffstat (limited to 'libbt/src/hardware.c')
| -rw-r--r-- | libbt/src/hardware.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/libbt/src/hardware.c b/libbt/src/hardware.c index 45008ef..759e8a8 100644 --- a/libbt/src/hardware.c +++ b/libbt/src/hardware.c @@ -95,6 +95,15 @@ #define UINT16_TO_STREAM(p, u16) {*(p)++ = (uint8_t)(u16); *(p)++ = (uint8_t)((u16) >> 8);} #define UINT32_TO_STREAM(p, u32) {*(p)++ = (uint8_t)(u32); *(p)++ = (uint8_t)((u32) >> 8); *(p)++ = (uint8_t)((u32) >> 16); *(p)++ = (uint8_t)((u32) >> 24);} +#if (USE_AXI_BRIDGE_LOCK == TRUE) +#define BTLOCK_DEV "/dev/btlock" +static int btlock_cookie = 'B' | 'T'<<8 | '3'<<16 | '5'<<24; +struct btlock { + int lock; + int cookie; +}; +#endif + /****************************************************************************** ** Local type definitions ******************************************************************************/ @@ -568,6 +577,53 @@ static uint8_t hw_config_read_bdaddr(HC_BT_HDR *p_buf) } #endif // (USE_CONTROLLER_BDADDR == TRUE) +#if (USE_AXI_BRIDGE_LOCK == TRUE) +/******************************************************************************* +** +** Function axi_bridge_lock +** +** Description Take semaphore to prevent concurrent BT/WiFi firmware loading +** +*******************************************************************************/ +void axi_bridge_lock(int locked) +{ + int fd = -1; + struct btlock lock; + int ret = 0; + + ALOGI("axi_bridge_lock: locked=%d", locked); + + fd = open(BTLOCK_DEV, O_WRONLY); + if (fd < 0) + { + ALOGE("axi_bridge_lock open failed: %s (%d)", + strerror(errno), errno); + return; + } + + lock.lock = locked; + lock.cookie = btlock_cookie; + + if (locked) + { + while ((ret = write(fd, &lock, sizeof(lock))) != 0) { + ALOGE("axi_bridge_lock acquire: %s (%d)", + strerror(errno), errno); + usleep(10000); + } + } else { + if (write(fd, &lock, sizeof(lock)) < 0) + { + ALOGE("axi_bridge_lock write failed: %s (%d)", + strerror(errno), errno); + } + } + + if (fd >= 0) + close(fd); +} +#endif // USE_AXI_BRIDGE_LOCK + /******************************************************************************* ** ** Function hw_config_cback @@ -713,6 +769,10 @@ void hw_config_cback(void *p_mem) close(hw_cfg_cb.fw_fd); hw_cfg_cb.fw_fd = -1; +#if (USE_AXI_BRIDGE_LOCK == TRUE) + axi_bridge_lock(0); +#endif + /* Normally the firmware patch configuration file * sets the new starting baud rate at 115200. * So, we need update host's baud rate accordingly. |