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mrf24j40: add csma params support 

This patch adds supports to change the CSMA parameters. The datasheet
doesn't say anything about max_be value. Seems not configurable and we
assume the 802.15.4 default. But this value must exists because there is
a min_be value.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Alexander Aring 2015-09-21 11:24:37 +02:00 committed by Marcel Holtmann
parent 374416112b
commit 2323cf38f9
1 changed files with 26 additions and 1 deletions
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27
drivers/net/ieee802154/mrf24j40.c
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@ -776,6 +776,21 @@ static int mrf24j40_handle_rx(struct mrf24j40 *devrec)
return spi_async(devrec->spi, &devrec->rx_msg);
}
static int
mrf24j40_csma_params(struct ieee802154_hw *hw, u8 min_be, u8 max_be,
u8 retries)
{
struct mrf24j40 *devrec = hw->priv;
u8 val;
/* min_be */
val = min_be << 3;
/* csma backoffs */
val |= retries;
return regmap_update_bits(devrec->regmap_short, REG_TXMCR, 0x1f, val);
}
static const struct ieee802154_ops mrf24j40_ops = {
.owner = THIS_MODULE,
.xmit_async = mrf24j40_tx,
@ -784,6 +799,7 @@ static const struct ieee802154_ops mrf24j40_ops = {
.stop = mrf24j40_stop,
.set_channel = mrf24j40_set_channel,
.set_hw_addr_filt = mrf24j40_filter,
.set_csma_params = mrf24j40_csma_params,
};
static void mrf24j40_intstat_complete(void *context)
@ -979,6 +995,14 @@ static void mrf24j40_phy_setup(struct mrf24j40 *devrec)
{
ieee802154_random_extended_addr(&devrec->hw->phy->perm_extended_addr);
devrec->hw->phy->current_channel = 11;
/* mrf24j40 supports max_minbe 0 - 3 */
devrec->hw->phy->supported.max_minbe = 3;
/* datasheet doesn't say anything about max_be, but we have min_be
* So we assume the max_be default.
*/
devrec->hw->phy->supported.min_maxbe = 5;
devrec->hw->phy->supported.max_maxbe = 5;
}
static int mrf24j40_probe(struct spi_device *spi)
@ -1001,7 +1025,8 @@ static int mrf24j40_probe(struct spi_device *spi)
devrec->hw = hw;
devrec->hw->parent = &spi->dev;
devrec->hw->phy->supported.channels[0] = CHANNEL_MASK;
devrec->hw->flags = IEEE802154_HW_TX_OMIT_CKSUM | IEEE802154_HW_AFILT;
devrec->hw->flags = IEEE802154_HW_TX_OMIT_CKSUM | IEEE802154_HW_AFILT |
IEEE802154_HW_CSMA_PARAMS;
mrf24j40_setup_tx_spi_messages(devrec);
mrf24j40_setup_rx_spi_messages(devrec);