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authorAlexander Aring <alex.aring@gmail.com>2015-09-21 12:24:37 +0300
committerMarcel Holtmann <marcel@holtmann.org>2015-09-22 12:51:23 +0300
commit2323cf38f949439bc4ac4252cf1d91d1297cce92 (patch)
treecf41586fbaebd329236f69e9302ab8ac6e2f7b4c /drivers/net/ieee802154
parent374416112bb0f83c5b4d8bb3fbb157fbe0b2814b (diff)
downloadlinux-2323cf38f949439bc4ac4252cf1d91d1297cce92.tar.xz
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>
Diffstat (limited to 'drivers/net/ieee802154')
-rw-r--r--drivers/net/ieee802154/mrf24j40.c27
1 files changed, 26 insertions, 1 deletions
diff --git a/drivers/net/ieee802154/mrf24j40.c b/drivers/net/ieee802154/mrf24j40.c
index 940fc0ad6bc1..fe7991d3b428 100644
--- a/drivers/net/ieee802154/mrf24j40.c
+++ b/drivers/net/ieee802154/mrf24j40.c
@@ -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);