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From:   Miquel Raynal <miquel.raynal@bootlin.com>
To:     Alexander Aring <alex.aring@gmail.com>,
        Stefan Schmidt <stefan@datenfreihafen.org>,
        linux-wpan@vger.kernel.org
Cc:     "David S. Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>, netdev@vger.kernel.org,
        linux-wireless@vger.kernel.org, Xue Liu <liuxuenetmail@gmail.com>,
        Alan Ott <alan@signal11.us>,
        Varka Bhadram <varkabhadram@gmail.com>,
        Michael Hennerich <michael.hennerich@analog.com>,
        David Girault <david.girault@qorvo.com>,
        Romuald Despres <romuald.despres@qorvo.com>,
        Frederic Blain <frederic.blain@qorvo.com>,
        Nicolas Schodet <nico@ni.fr.eu.org>,
        Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
        Miquel Raynal <miquel.raynal@bootlin.com>
Subject: [wpan-next 5/5] net: ieee802154: Drop duration settings when the core does it already
Date:   Thu, 20 Jan 2022 01:41:20 +0100
Message-Id: <20220120004120.308709-6-miquel.raynal@bootlin.com>
In-Reply-To: <20220120004120.308709-1-miquel.raynal@bootlin.com>
References: <20220120004120.308709-1-miquel.raynal@bootlin.com>
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The core now knows how to set the symbol duration in a few cases, when
drivers correctly advertise the protocols used on each channel. For
these drivers, there is no more need to bother with symbol duration,
lifs and sifs periods so just drop the duplicated code.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
 drivers/net/ieee802154/at86rf230.c | 33 ------------------------------
 drivers/net/ieee802154/atusb.c     | 33 ------------------------------
 drivers/net/ieee802154/ca8210.c    |  1 -
 drivers/net/ieee802154/mcr20a.c    |  5 -----
 4 files changed, 72 deletions(-)

diff --git a/drivers/net/ieee802154/at86rf230.c b/drivers/net/ieee802154/at86rf230.c
index 653931b20ab4..ee75505477e8 100644
--- a/drivers/net/ieee802154/at86rf230.c
+++ b/drivers/net/ieee802154/at86rf230.c
@@ -1056,36 +1056,6 @@ at86rf212_set_channel(struct at86rf230_local *lp, u8 page, u8 channel)
 	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 * NSEC_PER_USEC;
-		} else {
-			/* SUB:1 and BPSK:0 -> BPSK-40 */
-			lp->hw->phy->symbol_duration = 25 * NSEC_PER_USEC;
-		}
-	} else {
-		if (page == 0)
-			/* SUB:0 and BPSK:1 -> OQPSK-100/200/400 */
-			lp->hw->phy->symbol_duration = 40 * NSEC_PER_USEC;
-		else
-			/* SUB:1 and BPSK:1 -> OQPSK-250/500/1000 */
-			lp->hw->phy->symbol_duration = 16 * NSEC_PER_USEC;
-	}
-
-	lp->hw->phy->lifs_period =
-		(IEEE802154_LIFS_PERIOD * lp->hw->phy->symbol_duration) / 1000;
-	lp->hw->phy->sifs_period =
-		(IEEE802154_SIFS_PERIOD * lp->hw->phy->symbol_duration) / 1000;
-
 	return at86rf230_write_subreg(lp, SR_CHANNEL, channel);
 }
 
@@ -1564,7 +1534,6 @@ at86rf230_detect_device(struct at86rf230_local *lp)
 		lp->hw->phy->supported.page[0].chunk[0].protocol = IEEE802154_OQPSK_PHY;
 		lp->hw->phy->supported.page[0].chunk[0].band = IEEE802154_2400_MHZ_BAND;
 		lp->hw->phy->current_channel = 11;
-		lp->hw->phy->symbol_duration = 16 * NSEC_PER_USEC;
 		lp->hw->phy->supported.tx_powers = at86rf231_powers;
 		lp->hw->phy->supported.tx_powers_size = ARRAY_SIZE(at86rf231_powers);
 		lp->hw->phy->supported.cca_ed_levels = at86rf231_ed_levels;
@@ -1596,7 +1565,6 @@ at86rf230_detect_device(struct at86rf230_local *lp)
 		lp->hw->phy->supported.page[2].chunk[1].band = IEEE802154_915_MHZ_BAND;
 
 		lp->hw->phy->current_channel = 5;
-		lp->hw->phy->symbol_duration = 25 * NSEC_PER_USEC;
 		lp->hw->phy->supported.lbt = NL802154_SUPPORTED_BOOL_BOTH;
 		lp->hw->phy->supported.tx_powers = at86rf212_powers;
 		lp->hw->phy->supported.tx_powers_size = ARRAY_SIZE(at86rf212_powers);
@@ -1611,7 +1579,6 @@ at86rf230_detect_device(struct at86rf230_local *lp)
 		lp->hw->phy->supported.page[0].chunk[0].protocol = IEEE802154_OQPSK_PHY;
 		lp->hw->phy->supported.page[0].chunk[0].band = IEEE802154_2400_MHZ_BAND;
 		lp->hw->phy->current_channel = 13;
-		lp->hw->phy->symbol_duration = 16 * NSEC_PER_USEC;
 		lp->hw->phy->supported.tx_powers = at86rf233_powers;
 		lp->hw->phy->supported.tx_powers_size = ARRAY_SIZE(at86rf233_powers);
 		lp->hw->phy->supported.cca_ed_levels = at86rf233_ed_levels;
diff --git a/drivers/net/ieee802154/atusb.c b/drivers/net/ieee802154/atusb.c
index 80382919520e..1a56073c1c52 100644
--- a/drivers/net/ieee802154/atusb.c
+++ b/drivers/net/ieee802154/atusb.c
@@ -667,36 +667,6 @@ static int hulusb_set_channel(struct ieee802154_hw *hw, u8 page, u8 channel)
 	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 * NSEC_PER_USEC;
-		} else {
-			/* SUB:1 and BPSK:0 -> BPSK-40 */
-			lp->hw->phy->symbol_duration = 25 * NSEC_PER_USEC;
-		}
-	} else {
-		if (page == 0)
-			/* SUB:0 and BPSK:1 -> OQPSK-100/200/400 */
-			lp->hw->phy->symbol_duration = 40 * NSEC_PER_USEC;
-		else
-			/* SUB:1 and BPSK:1 -> OQPSK-250/500/1000 */
-			lp->hw->phy->symbol_duration = 16 * NSEC_PER_USEC;
-	}
-
-	lp->hw->phy->lifs_period =
-		(IEEE802154_LIFS_PERIOD * lp->hw->phy->symbol_duration) / 1000;
-	lp->hw->phy->sifs_period =
-		(IEEE802154_SIFS_PERIOD * lp->hw->phy->symbol_duration) / 1000;
-
 	return atusb_write_subreg(lp, SR_CHANNEL, channel);
 }
 
@@ -919,7 +889,6 @@ static int atusb_get_and_conf_chip(struct atusb *atusb)
 		atusb->hw->phy->supported.page[0].chunk[0].protocol = IEEE802154_OQPSK_PHY;
 		atusb->hw->phy->supported.page[0].chunk[0].band = IEEE802154_2400_MHZ_BAND;
 		atusb->hw->phy->current_channel = 11;	/* reset default */
-		atusb->hw->phy->symbol_duration = 16 * NSEC_PER_USEC;
 		atusb->hw->phy->supported.tx_powers = atusb_powers;
 		atusb->hw->phy->supported.tx_powers_size = ARRAY_SIZE(atusb_powers);
 		hw->phy->supported.cca_ed_levels = atusb_ed_levels;
@@ -932,7 +901,6 @@ static int atusb_get_and_conf_chip(struct atusb *atusb)
 		atusb->hw->phy->supported.page[0].chunk[0].protocol = IEEE802154_OQPSK_PHY;
 		atusb->hw->phy->supported.page[0].chunk[0].band = IEEE802154_2400_MHZ_BAND;
 		atusb->hw->phy->current_channel = 11;	/* reset default */
-		atusb->hw->phy->symbol_duration = 16 * NSEC_PER_USEC;
 		atusb->hw->phy->supported.tx_powers = atusb_powers;
 		atusb->hw->phy->supported.tx_powers_size = ARRAY_SIZE(atusb_powers);
 		hw->phy->supported.cca_ed_levels = atusb_ed_levels;
@@ -963,7 +931,6 @@ static int atusb_get_and_conf_chip(struct atusb *atusb)
 		atusb->hw->phy->supported.page[2].chunk[1].band = IEEE802154_915_MHZ_BAND;
 
 		atusb->hw->phy->current_channel = 5;
-		atusb->hw->phy->symbol_duration = 25 * NSEC_PER_USEC;
 		atusb->hw->phy->supported.lbt = NL802154_SUPPORTED_BOOL_BOTH;
 		atusb->hw->phy->supported.tx_powers = at86rf212_powers;
 		atusb->hw->phy->supported.tx_powers_size = ARRAY_SIZE(at86rf212_powers);
diff --git a/drivers/net/ieee802154/ca8210.c b/drivers/net/ieee802154/ca8210.c
index 809514611712..91456c5e5691 100644
--- a/drivers/net/ieee802154/ca8210.c
+++ b/drivers/net/ieee802154/ca8210.c
@@ -2978,7 +2978,6 @@ static void ca8210_hw_setup(struct ieee802154_hw *ca8210_hw)
 	ca8210_hw->phy->cca.mode = NL802154_CCA_ENERGY_CARRIER;
 	ca8210_hw->phy->cca.opt = NL802154_CCA_OPT_ENERGY_CARRIER_AND;
 	ca8210_hw->phy->cca_ed_level = -9800;
-	ca8210_hw->phy->symbol_duration = 16 * NSEC_PER_USEC;
 	ca8210_hw->phy->lifs_period = 40;
 	ca8210_hw->phy->sifs_period = 12;
 	ca8210_hw->flags =
diff --git a/drivers/net/ieee802154/mcr20a.c b/drivers/net/ieee802154/mcr20a.c
index 34063b7e663e..8d12c2968302 100644
--- a/drivers/net/ieee802154/mcr20a.c
+++ b/drivers/net/ieee802154/mcr20a.c
@@ -975,10 +975,6 @@ static void mcr20a_hw_setup(struct mcr20a_local *lp)
 
 	dev_dbg(printdev(lp), "%s\n", __func__);
 
-	phy->symbol_duration = 16 * NSEC_PER_USEC;
-	phy->lifs_period = (40 * phy->symbol_duration) / NSEC_PER_USEC;
-	phy->sifs_period = (12 * phy->symbol_duration) / NSEC_PER_USEC;
-
 	hw->flags = IEEE802154_HW_TX_OMIT_CKSUM |
 			IEEE802154_HW_AFILT |
 			IEEE802154_HW_PROMISCUOUS;
@@ -1010,7 +1006,6 @@ static void mcr20a_hw_setup(struct mcr20a_local *lp)
 	phy->current_page = 0;
 	/* MCR20A default reset value */
 	phy->current_channel = 20;
-	phy->symbol_duration = 16 * NSEC_PER_USEC;
 	phy->supported.tx_powers = mcr20a_powers;
 	phy->supported.tx_powers_size = ARRAY_SIZE(mcr20a_powers);
 	phy->cca_ed_level = phy->supported.cca_ed_levels[75];
-- 
2.27.0