From patchwork Wed Nov 22 09:25:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oleksij Rempel X-Patchwork-Id: 13464307 X-Patchwork-Delegate: kuba@kernel.org Authentication-Results: smtp.subspace.kernel.org; dkim=none Received: from metis.whiteo.stw.pengutronix.de (metis.whiteo.stw.pengutronix.de [IPv6:2a0a:edc0:2:b01:1d::104]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BDEB6F9 for ; Wed, 22 Nov 2023 01:26:00 -0800 (PST) Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1r5jUS-0006KN-BU; Wed, 22 Nov 2023 10:25:48 +0100 Received: from [2a0a:edc0:0:1101:1d::ac] (helo=dude04.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1r5jUQ-00AmPa-Tw; Wed, 22 Nov 2023 10:25:46 +0100 Received: from ore by dude04.red.stw.pengutronix.de with local (Exim 4.96) (envelope-from ) id 1r5jUQ-00C9J2-2j; Wed, 22 Nov 2023 10:25:46 +0100 From: Oleksij Rempel To: "David S. Miller" , Andrew Lunn , Eric Dumazet , Florian Fainelli , Jakub Kicinski , Paolo Abeni , Vladimir Oltean , Woojung Huh , Arun Ramadoss , "Russell King (Oracle)" Cc: Oleksij Rempel , Simon Horman , kernel@pengutronix.de, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, UNGLinuxDriver@microchip.com Subject: [PATCH net-next v5 1/3] net: dsa: microchip: ksz8: Make flow control, speed, and duplex on CPU port configurable Date: Wed, 22 Nov 2023 10:25:43 +0100 Message-Id: <20231122092545.2895635-2-o.rempel@pengutronix.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231122092545.2895635-1-o.rempel@pengutronix.de> References: <20231122092545.2895635-1-o.rempel@pengutronix.de> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: ore@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Allow flow control, speed, and duplex settings on the CPU port to be configurable. Previously, the speed and duplex relied on default switch values, which limited flexibility. Additionally, flow control was hardcoded and only functional in duplex mode. This update enhances the configurability of these parameters. Signed-off-by: Oleksij Rempel Reviewed-by: Simon Horman Reviewed-by: Vladimir Oltean --- drivers/net/dsa/microchip/ksz8.h | 4 ++ drivers/net/dsa/microchip/ksz8795.c | 54 +++++++++++++++++++++++++- drivers/net/dsa/microchip/ksz_common.c | 1 + 3 files changed, 57 insertions(+), 2 deletions(-) diff --git a/drivers/net/dsa/microchip/ksz8.h b/drivers/net/dsa/microchip/ksz8.h index ef653bbfde75..571c26ce71e4 100644 --- a/drivers/net/dsa/microchip/ksz8.h +++ b/drivers/net/dsa/microchip/ksz8.h @@ -54,5 +54,9 @@ int ksz8_reset_switch(struct ksz_device *dev); int ksz8_switch_init(struct ksz_device *dev); void ksz8_switch_exit(struct ksz_device *dev); int ksz8_change_mtu(struct ksz_device *dev, int port, int mtu); +void ksz8_phylink_mac_link_up(struct ksz_device *dev, int port, + unsigned int mode, phy_interface_t interface, + struct phy_device *phydev, int speed, int duplex, + bool tx_pause, bool rx_pause); #endif diff --git a/drivers/net/dsa/microchip/ksz8795.c b/drivers/net/dsa/microchip/ksz8795.c index 8deb217638d3..3504e7238eba 100644 --- a/drivers/net/dsa/microchip/ksz8795.c +++ b/drivers/net/dsa/microchip/ksz8795.c @@ -1528,6 +1528,58 @@ void ksz8_config_cpu_port(struct dsa_switch *ds) } } +/** + * ksz8_cpu_port_link_up - Configures the CPU port of the switch. + * @dev: The KSZ device instance. + * @speed: The desired link speed. + * @duplex: The desired duplex mode. + * @tx_pause: If true, enables transmit pause. + * @rx_pause: If true, enables receive pause. + * + * Description: + * The function configures flow control and speed settings for the CPU + * port of the switch based on the desired settings, current duplex mode, and + * speed. + */ +static void ksz8_cpu_port_link_up(struct ksz_device *dev, int speed, int duplex, + bool tx_pause, bool rx_pause) +{ + const u16 *regs = dev->info->regs; + u8 ctrl = 0; + + /* SW_FLOW_CTRL, SW_HALF_DUPLEX, and SW_10_MBIT bits are bootstrappable + * at least on KSZ8873. They can have different values depending on your + * board setup. + */ + if (duplex) { + if (tx_pause || rx_pause) + ctrl |= SW_FLOW_CTRL; + } else { + ctrl |= SW_HALF_DUPLEX; + } + + /* This hardware only supports SPEED_10 and SPEED_100. For SPEED_10 + * we need to set the SW_10_MBIT bit. Otherwise, we can leave it 0. + */ + if (speed == SPEED_10) + ctrl |= SW_10_MBIT; + + ksz_rmw8(dev, regs[S_BROADCAST_CTRL], SW_HALF_DUPLEX | SW_FLOW_CTRL | + SW_10_MBIT, ctrl); +} + +void ksz8_phylink_mac_link_up(struct ksz_device *dev, int port, + unsigned int mode, phy_interface_t interface, + struct phy_device *phydev, int speed, int duplex, + bool tx_pause, bool rx_pause) +{ + /* If the port is the CPU port, apply special handling. Only the CPU + * port is configured via global registers. + */ + if (dev->cpu_port == port) + ksz8_cpu_port_link_up(dev, speed, duplex, tx_pause, rx_pause); +} + static int ksz8_handle_global_errata(struct dsa_switch *ds) { struct ksz_device *dev = ds->priv; @@ -1576,8 +1628,6 @@ int ksz8_setup(struct dsa_switch *ds) */ ds->vlan_filtering_is_global = true; - ksz_cfg(dev, S_REPLACE_VID_CTRL, SW_FLOW_CTRL, true); - /* Enable automatic fast aging when link changed detected. */ ksz_cfg(dev, S_LINK_AGING_CTRL, SW_LINK_AUTO_AGING, true); diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c index 3fed406fb46a..0ee7cfb8d4bd 100644 --- a/drivers/net/dsa/microchip/ksz_common.c +++ b/drivers/net/dsa/microchip/ksz_common.c @@ -277,6 +277,7 @@ static const struct ksz_dev_ops ksz8_dev_ops = { .mirror_add = ksz8_port_mirror_add, .mirror_del = ksz8_port_mirror_del, .get_caps = ksz8_get_caps, + .phylink_mac_link_up = ksz8_phylink_mac_link_up, .config_cpu_port = ksz8_config_cpu_port, .enable_stp_addr = ksz8_enable_stp_addr, .reset = ksz8_reset_switch,