static int
at86rf212_set_channel(struct at86rf230_local *lp, u8 page, u8 channel)
{
int rc;
if (channel == 0)
rc = at86rf230_write_subreg(lp, SR_SUB_MODE, 0);
else
rc = at86rf230_write_subreg(lp, SR_SUB_MODE, 1);
if (rc < 0)
return rc;
if (page == 0) {
rc = at86rf230_write_subreg(lp, SR_BPSK_QPSK, 0);
lp->data->rssi_base_val = -100;
} else {
rc = at86rf230_write_subreg(lp, SR_BPSK_QPSK, 1);
lp->data->rssi_base_val = -98;
}
if (rc < 0)
return rc;
rc = at86rf212_update_cca_ed_level(lp, lp->data->rssi_base_val);
if (rc < 0)
return rc;
/* This sets the symbol_duration according frequency on the 212.
* TODO move this handling while set channel and page in cfg802154.
* We can do that, this timings are according 802.15.4 standard.
* If we do that in cfg802154, this is a more generic calculation.
*
* This should also protected from ifs_timer. Means cancel timer and
* init with a new value. For now, this is okay.
*/
if (channel == 0) {
if (page == 0) {
/* SUB:0 and BPSK:0 -> BPSK-20 */
lp->hw->phy->symbol_duration = 50;
} else {
/* SUB:1 and BPSK:0 -> BPSK-40 */
lp->hw->phy->symbol_duration = 25;
}
} else {
if (page == 0)
/* SUB:0 and BPSK:1 -> OQPSK-100/200/400 */
lp->hw->phy->symbol_duration = 40;
else
/* SUB:1 and BPSK:1 -> OQPSK-250/500/1000 */
lp->hw->phy->symbol_duration = 16;
}
lp->hw->phy->lifs_period = IEEE802154_LIFS_PERIOD *
lp->hw->phy->symbol_duration;
lp->hw->phy->sifs_period = IEEE802154_SIFS_PERIOD *
lp->hw->phy->symbol_duration;
return at86rf230_write_subreg(lp, SR_CHANNEL, channel);
}
static void
at86rf230_stop(struct ieee802154_hw *hw)
{
struct at86rf230_local *lp = hw->priv;
u8 csma_seed[2];
at86rf230_sync_state_change(lp, STATE_FORCE_TRX_OFF);
disable_irq(lp->spi->irq);
/* It's recommended to set random new csma_seeds before sleep state.
* Makes only sense in the stop callback, not doing this inside of
* at86rf230_sleep, this is also used when we don't transmit afterwards
* when calling start callback again.
*/
get_random_bytes(csma_seed, ARRAY_SIZE(csma_seed));
at86rf230_write_subreg(lp, SR_CSMA_SEED_0, csma_seed[0]);
at86rf230_write_subreg(lp, SR_CSMA_SEED_1, csma_seed[1]);
at86rf230_sleep(lp);
}
static int
at86rf23x_set_channel(struct at86rf230_local *lp, u8 page, u8 channel)
{
return at86rf230_write_subreg(lp, SR_CHANNEL, channel);
}
