diff options
Diffstat (limited to 'libbt/src/upio.c')
| -rw-r--r-- | libbt/src/upio.c | 209 |
1 files changed, 199 insertions, 10 deletions
diff --git a/libbt/src/upio.c b/libbt/src/upio.c index d32f334..2de171c 100644 --- a/libbt/src/upio.c +++ b/libbt/src/upio.c @@ -54,6 +54,39 @@ ** Local type definitions ******************************************************************************/ +#if (BT_WAKE_VIA_PROC == TRUE) + +/* proc fs node for enable/disable lpm mode */ +#ifndef VENDOR_LPM_PROC_NODE +#define VENDOR_LPM_PROC_NODE "/proc/bluetooth/sleep/lpm" +#endif + +/* proc fs node for notifying write request */ +#ifndef VENDOR_BTWRITE_PROC_NODE +#define VENDOR_BTWRITE_PROC_NODE "/proc/bluetooth/sleep/btwrite" +#endif + +/* + * Maximum btwrite assertion holding time without consecutive btwrite kicking. + * This value is correlative(shorter) to the in-activity timeout period set in + * the bluesleep LPM code. The current value used in bluesleep is 10sec. + */ +#ifndef PROC_BTWRITE_TIMER_TIMEOUT_MS +#define PROC_BTWRITE_TIMER_TIMEOUT_MS 8000 +#endif + +/* lpm proc control block */ +typedef struct +{ + uint8_t btwrite_active; + uint8_t timer_created; + timer_t timer_id; + uint32_t timeout_ms; +} vnd_lpm_proc_cb_t; + +static vnd_lpm_proc_cb_t lpm_proc_cb; +#endif + /****************************************************************************** ** Static variables ******************************************************************************/ @@ -68,6 +101,12 @@ static char *rfkill_state_path = NULL; ******************************************************************************/ /* for friendly debugging outpout string */ +static char *lpm_mode[] = { + "UNKNOWN", + "disabled", + "enabled" +}; + static char *lpm_state[] = { "UNKNOWN", "de-asserted", @@ -141,6 +180,23 @@ static int init_rfkill() ** LPM Static Functions *****************************************************************************/ +#if (BT_WAKE_VIA_PROC == TRUE) +/******************************************************************************* +** +** Function proc_btwrite_timeout +** +** Description Timeout thread of proc/.../btwrite assertion holding timer +** +** Returns None +** +*******************************************************************************/ +static void proc_btwrite_timeout(union sigval arg) +{ + UPIODBG("..%s..", __FUNCTION__); + lpm_proc_cb.btwrite_active = FALSE; +} +#endif + /***************************************************************************** ** UPIO Interface Functions *****************************************************************************/ @@ -157,6 +213,9 @@ static int init_rfkill() void upio_init(void) { memset(upio_state, UPIO_UNKNOWN, UPIO_MAX_COUNT); +#if (BT_WAKE_VIA_PROC == TRUE) + memset(&lpm_proc_cb, 0, sizeof(vnd_lpm_proc_cb_t)); +#endif } /******************************************************************************* @@ -170,6 +229,12 @@ void upio_init(void) *******************************************************************************/ void upio_cleanup(void) { +#if (BT_WAKE_VIA_PROC == TRUE) + if (lpm_proc_cb.timer_created == TRUE) + timer_delete(lpm_proc_cb.timer_id); + + lpm_proc_cb.timer_created = FALSE; +#endif } /******************************************************************************* @@ -260,33 +325,157 @@ int upio_set_bluetooth_power(int on) void upio_set(uint8_t pio, uint8_t action, uint8_t polarity) { int rc; +#if (BT_WAKE_VIA_PROC == TRUE) + int fd = -1; + char buffer; +#endif switch (pio) { - case UPIO_BT_WAKE: + case UPIO_LPM_MODE: + if (upio_state[UPIO_LPM_MODE] == action) + { + UPIODBG("LPM is %s already", lpm_mode[action]); + return; + } + + upio_state[UPIO_LPM_MODE] = action; + +#if (BT_WAKE_VIA_PROC == TRUE) + fd = open(VENDOR_LPM_PROC_NODE, O_WRONLY); + + if (fd < 0) + { + ALOGE("upio_set : open(%s) for write failed: %s (%d)", + VENDOR_LPM_PROC_NODE, strerror(errno), errno); + return; + } + + if (action == UPIO_ASSERT) + { + buffer = '1'; + } + else + { + buffer = '0'; + + // delete btwrite assertion holding timer + if (lpm_proc_cb.timer_created == TRUE) + { + timer_delete(lpm_proc_cb.timer_id); + lpm_proc_cb.timer_created = FALSE; + } + } + + if (write(fd, &buffer, 1) < 0) + { + ALOGE("upio_set : write(%s) failed: %s (%d)", + VENDOR_LPM_PROC_NODE, strerror(errno),errno); + } + else + { + if (action == UPIO_ASSERT) + { + // create btwrite assertion holding timer + if (lpm_proc_cb.timer_created == FALSE) + { + int status; + struct sigevent se; + + se.sigev_notify = SIGEV_THREAD; + se.sigev_value.sival_ptr = &lpm_proc_cb.timer_id; + se.sigev_notify_function = proc_btwrite_timeout; + se.sigev_notify_attributes = NULL; + + status = timer_create(CLOCK_MONOTONIC, &se, + &lpm_proc_cb.timer_id); + + if (status == 0) + lpm_proc_cb.timer_created = TRUE; + } + } + } + if (fd >= 0) + close(fd); +#endif + break; + + case UPIO_BT_WAKE: if (upio_state[UPIO_BT_WAKE] == action) { UPIODBG("BT_WAKE is %s already", lpm_state[action]); + +#if (BT_WAKE_VIA_PROC == TRUE) + if (lpm_proc_cb.btwrite_active == TRUE) + /* + * The proc btwrite node could have not been updated for + * certain time already due to heavy downstream path flow. + * In this case, we want to explicity touch proc btwrite + * node to keep the bt_wake assertion in the LPM kernel + * driver. The current kernel bluesleep LPM code starts + * a 10sec internal in-activity timeout timer before it + * attempts to deassert BT_WAKE line. + */ +#endif return; } upio_state[UPIO_BT_WAKE] = action; - /**************************************** - * !!! TODO !!! - * - * === Custom Porting Required === - * - * Platform dependent user-to-kernel - * interface is required to set output - * state of physical BT_WAKE pin. - ****************************************/ #if (BT_WAKE_VIA_USERIAL_IOCTL == TRUE) + userial_vendor_ioctl( ( (action==UPIO_ASSERT) ? \ USERIAL_OP_ASSERT_BT_WAKE : USERIAL_OP_DEASSERT_BT_WAKE),\ NULL); + +#elif (BT_WAKE_VIA_PROC == TRUE) + + /* + * Kick proc btwrite node only at UPIO_ASSERT + */ + if (action == UPIO_DEASSERT) + return; + + fd = open(VENDOR_BTWRITE_PROC_NODE, O_WRONLY); + + if (fd < 0) + { + ALOGE("upio_set : open(%s) for write failed: %s (%d)", + VENDOR_BTWRITE_PROC_NODE, strerror(errno), errno); + return; + } + + buffer = '1'; + + if (write(fd, &buffer, 1) < 0) + { + ALOGE("upio_set : write(%s) failed: %s (%d)", + VENDOR_BTWRITE_PROC_NODE, strerror(errno),errno); + } + else + { + lpm_proc_cb.btwrite_active = TRUE; + + if (lpm_proc_cb.timer_created == TRUE) + { + struct itimerspec ts; + + ts.it_value.tv_sec = PROC_BTWRITE_TIMER_TIMEOUT_MS/1000; + ts.it_value.tv_nsec = 1000*(PROC_BTWRITE_TIMER_TIMEOUT_MS%1000); + ts.it_interval.tv_sec = 0; + ts.it_interval.tv_nsec = 0; + + timer_settime(lpm_proc_cb.timer_id, 0, &ts, 0); + } + } + + UPIODBG("proc btwrite assertion"); + + if (fd >= 0) + close(fd); #endif + break; case UPIO_HOST_WAKE: |