static enum acipc_return_code acipc_event_unbind(u32 user_event)
{
u32 i;
IPC_ENTER();
for (i = 0; i < ACIPC_NUMBER_OF_EVENTS; i++) {
if (acipc->acipc_db.event_db[i].mask & user_event) {
if (acipc->acipc_db.event_db[i].IIR_bit & user_event) {
acipc_int_disable(acipc->acipc_db.event_db[i].
IIR_bit);
acipc->acipc_db.event_db[i].cb =
acipc_default_callback;
acipc->acipc_db.event_db[i].mode =
ACIPC_CB_NORMAL;
acipc->acipc_db.event_db[i].mask = 0;
}
/* clean this event from other event's mask */
acipc->acipc_db.event_db[i].mask &= ~user_event;
}
}
IPC_LEAVE();
return ACIPC_RC_OK;
}
acipc_return_code acipc_event_bind(u32 user_event, acipc_rec_event_callback cb,
acipc_callback_mode cb_mode, u32 *historical_event_status)
{
u32 i;
IPC_ENTER();
for (i=0;i<ACIPC_NUMBER_OF_EVENTS;i++)
{
if (acipc->acipc_db.event_db[i].IIR_bit & user_event)
{
if (acipc->acipc_db.event_db[i].cb != acipc_default_callback)
return(ACIPC_EVENT_ALREADY_BIND);
else
{
acipc->acipc_db.event_db[i].cb = cb;
acipc->acipc_db.event_db[i].mode = cb_mode;
acipc->acipc_db.event_db[i].mask = user_event &
acipc->acipc_db.event_db[i].IIR_bit;
acipc_int_enable(acipc->acipc_db.event_db[i].IIR_bit);
}
}
}
/* if there were historical events*/
if (acipc->acipc_db.historical_event_status & user_event)
{
*historical_event_status =
acipc->acipc_db.historical_event_status & user_event;
/* clear the historical events from the database*/
acipc->acipc_db.historical_event_status &= ~user_event;
return (ACIPC_HISTORICAL_EVENT_OCCUR);
}
IPC_LEAVE();
return ACIPC_RC_OK;
}
static enum acipc_return_code acipc_event_set(enum acipc_events user_event)
{
IPC_ENTER();
acipc_writel_withdummy(IPC_ISRW, user_event);
IPCTRACE("acipc_event_set userEvent 0x%x\n", user_event);
IPC_LEAVE();
return ACIPC_RC_OK;
}
static irqreturn_t acipc_interrupt_handler(int irq, void *dev_id)
{
u32 i, on_events;
IPC_ENTER();
ACIPC_IIR_READ(acipc->IIR_val); /* read the IIR*/
/*using ACIPCEventStatusGet might cause getting here with IIR=0*/
if (acipc->IIR_val)
{
for (i = 0; i < ACIPC_NUMBER_OF_EVENTS; i++)
{
/* NOTE: if the driver state is 'NO_DDR' the following
* condition will ignore events that configure to be
* called only when DDR availble. currently this will
* leave the event bit on meaning the LISR will be called
* upon release interrupts.thus the driver state must be restore
* ( to NORMAL) before release the interrupts
*/
#if 0
if ((acipc->acipc_db.event_db[i].IIR_bit & acipc->IIR_val)&&
(!((acipc->acipc_db.driver_mode == ACIPC_CB_ALWAYS_NO_DDR)&&
(acipc->acipc_db.event_db[i].mode == ACIPC_CB_NORMAL)))){
#else
if ((acipc->acipc_db.event_db[i].IIR_bit & acipc->IIR_val) &&
(acipc->acipc_db.event_db[i].mode == ACIPC_CB_NORMAL)) {
#endif
on_events = (acipc->IIR_val)&(acipc->acipc_db.event_db[i].mask);
/* call the user callback with the status of other
* events as define when the user called ACIPCEventBind
*/
acipc->acipc_db.event_db[i].cb(on_events);
/* clean the event(s)*/
acipc_writel(IPC_ICR, on_events);
/* if more then one event exist we clear
* the rest of the bits from the global
* IIR_val so user callback will be called only once.
*/
acipc->IIR_val &= (~on_events);
}
}
}
IPC_LEAVE();
return IRQ_HANDLED;
}
u32 user_callback(u32 events_status)
{
acipc->bind_event_arg = events_status;
acipc->poll_status = 1;
wake_up_interruptible(&acipc->acipc_wait_q);
return 0;
}
acipc_return_code acipc_event_set(acipc_events user_event)
{
IPC_ENTER();
acipc_writel(IPC_ISRW, user_event);
IPCTRACE("acipc_event_set userEvent 0x%x\n", user_event);
IPC_LEAVE();
return(ACIPC_RC_OK);
}
static enum acipc_return_code acipc_data_read(acipc_data *data)
{
IPC_ENTER();
/* reading the data from RDR */
*data = acipc_readl(IPC_RDR);
IPC_LEAVE();
return ACIPC_RC_OK;
}
static u32 acipc_default_callback(u32 status)
{
IPC_ENTER();
/* getting here means that the client didn't yet bind his callback.
* we will save the event until the bind occur
*/
acipc->acipc_db.historical_event_status += status;
IPC_LEAVE();
return 0 ;
}
static void acipc_change_driver_state(int is_DDR_ready)
{
IPC_ENTER();
IPCTRACE("acipc_change_driver_state isDDRReady %d\n", is_DDR_ready);
if (is_DDR_ready)
acipc->acipc_db.driver_mode = ACIPC_CB_NORMAL;
else
acipc->acipc_db.driver_mode = ACIPC_CB_ALWAYS_NO_DDR;
IPC_LEAVE();
}
acipc_return_code acipc_data_send(acipc_events user_event, acipc_data data)
{
IPC_ENTER();
IPCTRACE("acipc_data_send userEvent 0x%x, data 0x%x\n", user_event, data);
/* writing the data to WDR*/
acipc_writel(IPC_WDR, data);
/* fire the event to the other subsystem
* to indicate the data is ready for read
*/
acipc_writel(IPC_ISRW, user_event);
IPC_LEAVE();
return ACIPC_RC_OK;
}
static irqreturn_t acipc_interrupt_handler(int irq, void *dev_id)
{
u32 i, on_events;
IPC_ENTER();
ACIPC_IIR_READ(acipc->IIR_val); /* read the IIR */
/* using ACIPCEventStatusGet might cause getting here with IIR=0 */
if (acipc->IIR_val) {
for (i = 0; i < ACIPC_NUMBER_OF_EVENTS; i++) {
if ((acipc->acipc_db.event_db[i].IIR_bit &
acipc->IIR_val)
&& (acipc->acipc_db.event_db[i].mode ==
ACIPC_CB_NORMAL)) {
on_events =
(acipc->IIR_val) & (acipc->acipc_db.
event_db[i].mask);
/* clean the event(s) */
acipc_writel_withdummy(IPC_ICR, on_events);
/*
* call the user callback with the status
* of other events as define when the user
* called ACIPCEventBind
*/
acipc->acipc_db.event_db[i].cb(on_events);
/*
* if more then one event exist we clear
* the rest of the bits from the global
* IIR_val so user callback will be called
* only once.
*/
acipc->IIR_val &= (~on_events);
}
}
}
IPC_LEAVE();
return IRQ_HANDLED;
}
acipc_return_code acipc_event_status_get(u32 user_event, u32 *status)
{
u32 IIR_local_val;
IPC_ENTER();
/* reading the status from IIR*/
ACIPC_IIR_READ(IIR_local_val);
/* clear the events hw status*/
acipc_writel(IPC_ICR, user_event);
/* verify that this event will be cleared from the global IIR variable.
* for cases this API is called from user callback
*/
acipc->IIR_val &= ~(user_event);
*status = IIR_local_val & user_event;
IPC_LEAVE();
return ACIPC_RC_OK;
}