Пример #1
0
static void
at86rf230_irq_trx_end(void *context)
{
	struct at86rf230_state_change *ctx = context;
	struct at86rf230_local *lp = ctx->lp;

	if (lp->is_tx) {
		lp->is_tx = 0;
		at86rf230_async_read_reg(lp, RG_TRX_STATE, ctx,
					 at86rf230_tx_trac_check);
	} else {
		at86rf230_async_read_reg(lp, RG_TRX_STATE, ctx,
					 at86rf230_rx_trac_check);
	}
}
Пример #2
0
static void
at86rf230_async_state_change_start(void *context)
{
	struct at86rf230_state_change *ctx = context;
	struct at86rf230_local *lp = ctx->lp;
	u8 *buf = ctx->buf;
	const u8 trx_state = buf[1] & TRX_STATE_MASK;

	/* Check for "possible" STATE_TRANSITION_IN_PROGRESS */
	if (trx_state == STATE_TRANSITION_IN_PROGRESS) {
		udelay(1);
		at86rf230_async_read_reg(lp, RG_TRX_STATUS, ctx,
					 at86rf230_async_state_change_start);
		return;
	}

	/* Check if we already are in the state which we change in */
	if (trx_state == ctx->to_state) {
		if (ctx->complete)
			ctx->complete(context);
		return;
	}

	/* Set current state to the context of state change */
	ctx->from_state = trx_state;

	/* Going into the next step for a state change which do a timing
	 * relevant delay.
	 */
	at86rf230_async_write_reg(lp, RG_TRX_STATE, ctx->to_state, ctx,
				  at86rf230_async_state_delay);
}
Пример #3
0
static void
at86rf230_tx_trac_status(void *context)
{
	struct at86rf230_state_change *ctx = context;
	struct at86rf230_local *lp = ctx->lp;

	at86rf230_async_read_reg(lp, RG_TRX_STATE, ctx,
				 at86rf230_tx_trac_check, true);
}
Пример #4
0
static void
at86rf230_async_state_change(struct at86rf230_local *lp,
			     struct at86rf230_state_change *ctx,
			     const u8 state, void (*complete)(void *context))
{
	/* Initialization for the state change context */
	ctx->to_state = state;
	ctx->complete = complete;
	at86rf230_async_read_reg(lp, RG_TRX_STATUS, ctx,
				 at86rf230_async_state_change_start);
}
Пример #5
0
static enum hrtimer_restart at86rf230_async_state_timer(struct hrtimer *timer)
{
	struct at86rf230_state_change *ctx =
		container_of(timer, struct at86rf230_state_change, timer);
	struct at86rf230_local *lp = ctx->lp;

	at86rf230_async_read_reg(lp, RG_TRX_STATUS, ctx,
				 at86rf230_async_state_assert);

	return HRTIMER_NORESTART;
}
Пример #6
0
static void
at86rf230_irq_trx_end(struct at86rf230_local *lp)
{
	if (lp->is_tx) {
		lp->is_tx = 0;
		at86rf230_async_state_change(lp, &lp->irq,
					     STATE_FORCE_TX_ON,
					     at86rf230_tx_trac_status,
					     true);
	} else {
		at86rf230_async_read_reg(lp, RG_TRX_STATE, &lp->irq,
					 at86rf230_rx_trac_check, true);
	}
}
Пример #7
0
static void
at86rf230_async_state_change_start(void *context)
{
	struct at86rf230_state_change *ctx = context;
	struct at86rf230_local *lp = ctx->lp;
	u8 *buf = ctx->buf;
	const u8 trx_state = buf[1] & 0x1f;
	int rc;

	/* Check for "possible" STATE_TRANSITION_IN_PROGRESS */
	if (trx_state == STATE_TRANSITION_IN_PROGRESS) {
		udelay(1);
		at86rf230_async_read_reg(lp, RG_TRX_STATUS, ctx,
					 at86rf230_async_state_change_start,
					 ctx->irq_enable);
		return;
	}

	/* Check if we already are in the state which we change in */
	if (trx_state == ctx->to_state) {
		if (ctx->complete)
			ctx->complete(context);
		return;
	}

	/* Set current state to the context of state change */
	ctx->from_state = trx_state;

	/* Going into the next step for a state change which do a timing
	 * relevant delay.
	 */
	buf[0] = (RG_TRX_STATE & CMD_REG_MASK) | CMD_REG | CMD_WRITE;
	buf[1] = ctx->to_state;
	ctx->trx.len = 2;
	ctx->msg.complete = at86rf230_async_state_delay;
	rc = spi_async(lp->spi, &ctx->msg);
	if (rc) {
		if (ctx->irq_enable)
			enable_irq(lp->spi->irq);

		at86rf230_async_error(lp, ctx, rc);
	}
}
Пример #8
0
static void
at86rf230_irq_trx_end(struct at86rf230_local *lp)
{
	spin_lock(&lp->lock);
	if (lp->is_tx) {
		lp->is_tx = 0;
		spin_unlock(&lp->lock);

		if (lp->tx_aret)
			at86rf230_async_state_change(lp, &lp->irq,
						     STATE_FORCE_TX_ON,
						     at86rf230_tx_trac_status,
						     true);
		else
			at86rf230_async_state_change(lp, &lp->irq,
						     STATE_RX_AACK_ON,
						     at86rf230_tx_complete,
						     true);
	} else {
		spin_unlock(&lp->lock);
		at86rf230_async_read_reg(lp, RG_TRX_STATE, &lp->irq,
					 at86rf230_rx_trac_check, true);
	}
}
Пример #9
0
/* Do state change timing delay. */
static void
at86rf230_async_state_delay(void *context)
{
	struct at86rf230_state_change *ctx = context;
	struct at86rf230_local *lp = ctx->lp;
	struct at86rf2xx_chip_data *c = lp->data;
	bool force = false;

	/* The force state changes are will show as normal states in the
	 * state status subregister. We change the to_state to the
	 * corresponding one and remember if it was a force change, this
	 * differs if we do a state change from STATE_BUSY_RX_AACK.
	 */
	switch (ctx->to_state) {
	case STATE_FORCE_TX_ON:
		ctx->to_state = STATE_TX_ON;
		force = true;
		break;
	case STATE_FORCE_TRX_OFF:
		ctx->to_state = STATE_TRX_OFF;
		force = true;
		break;
	default:
		break;
	}

	switch (ctx->from_state) {
	case STATE_TRX_OFF:
		switch (ctx->to_state) {
		case STATE_RX_AACK_ON:
			usleep_range(c->t_off_to_aack, c->t_off_to_aack + 10);
			goto change;
		case STATE_TX_ON:
			usleep_range(c->t_off_to_tx_on,
				     c->t_off_to_tx_on + 10);
			goto change;
		default:
			break;
		}
		break;
	case STATE_BUSY_RX_AACK:
		switch (ctx->to_state) {
		case STATE_TX_ON:
			/* Wait for worst case receiving time if we
			 * didn't make a force change from BUSY_RX_AACK
			 * to TX_ON.
			 */
			if (!force) {
				usleep_range(c->t_frame + c->t_p_ack,
					     c->t_frame + c->t_p_ack + 1000);
				goto change;
			}
			break;
		default:
			break;
		}
		break;
	/* Default value, means RESET state */
	case STATE_P_ON:
		switch (ctx->to_state) {
		case STATE_TRX_OFF:
			usleep_range(c->t_reset_to_off, c->t_reset_to_off + 10);
			goto change;
		default:
			break;
		}
		break;
	default:
		break;
	}

	/* Default delay is 1us in the most cases */
	udelay(1);

change:
	at86rf230_async_read_reg(lp, RG_TRX_STATUS, ctx,
				 at86rf230_async_state_assert,
				 ctx->irq_enable);
}