From: Ansuel Smith <ansuelsmth@gmail.com>
To: Andrew Lunn <andrew@lunn.ch>,
Vivien Didelot <vivien.didelot@gmail.com>,
Florian Fainelli <f.fainelli@gmail.com>,
Vladimir Oltean <olteanv@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Rob Herring <robh+dt@kernel.org>,
Heiner Kallweit <hkallweit1@gmail.com>,
Russell King <linux@armlinux.org.uk>,
netdev@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org
Cc: Ansuel Smith <ansuelsmth@gmail.com>
Subject: [PATCH net-next v6 16/25] net: dsa: qca8k: make rgmii delay configurable
Date: Fri, 14 May 2021 23:00:06 +0200 [thread overview]
Message-ID: <20210514210015.18142-17-ansuelsmth@gmail.com> (raw)
In-Reply-To: <20210514210015.18142-1-ansuelsmth@gmail.com>
The legacy qsdk code used a different delay instead of the max value.
Qsdk use 1 ns for rx and 2 ns for tx. Make these values configurable
using the standard rx/tx-internal-delay-ps ethernet binding and apply
qsdk values by default. The connected gmac doesn't add any delay so no
additional delay is added to tx/rx.
On this switch the delay is actually in ns so value should be in the
1000 order. Any value converted from ps to ns by dividing it by 1000
as the switch max value for delay is 3ns.
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
---
drivers/net/dsa/qca8k.c | 82 ++++++++++++++++++++++++++++++++++++++++-
drivers/net/dsa/qca8k.h | 11 +++---
2 files changed, 86 insertions(+), 7 deletions(-)
diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c
index cc9ab35f8b17..dedbc6565516 100644
--- a/drivers/net/dsa/qca8k.c
+++ b/drivers/net/dsa/qca8k.c
@@ -777,6 +777,68 @@ qca8k_setup_mdio_bus(struct qca8k_priv *priv)
return 0;
}
+static int
+qca8k_setup_of_rgmii_delay(struct qca8k_priv *priv)
+{
+ struct device_node *port_dn;
+ phy_interface_t mode;
+ struct dsa_port *dp;
+ u32 val;
+
+ /* CPU port is already checked */
+ dp = dsa_to_port(priv->ds, 0);
+
+ port_dn = dp->dn;
+
+ /* Check if port 0 is set to the correct type */
+ of_get_phy_mode(port_dn, &mode);
+ if (mode != PHY_INTERFACE_MODE_RGMII_ID &&
+ mode != PHY_INTERFACE_MODE_RGMII_RXID &&
+ mode != PHY_INTERFACE_MODE_RGMII_TXID) {
+ return 0;
+ }
+
+ switch (mode) {
+ case PHY_INTERFACE_MODE_RGMII_ID:
+ case PHY_INTERFACE_MODE_RGMII_RXID:
+ if (of_property_read_u32(port_dn, "rx-internal-delay-ps", &val))
+ val = 2;
+ else
+ /* Switch regs accept value in ns, convert ps to ns */
+ val = val / 1000;
+
+ if (val > QCA8K_MAX_DELAY) {
+ dev_err(priv->dev, "rgmii rx delay is limited to a max value of 3ns, setting to the max value");
+ val = 3;
+ }
+
+ priv->rgmii_rx_delay = val;
+ /* Stop here if we need to check only for rx delay */
+ if (mode != PHY_INTERFACE_MODE_RGMII_ID)
+ break;
+
+ fallthrough;
+ case PHY_INTERFACE_MODE_RGMII_TXID:
+ if (of_property_read_u32(port_dn, "tx-internal-delay-ps", &val))
+ val = 1;
+ else
+ /* Switch regs accept value in ns, convert ps to ns */
+ val = val / 1000;
+
+ if (val > QCA8K_MAX_DELAY) {
+ dev_err(priv->dev, "rgmii tx delay is limited to a max value of 3ns, setting to the max value");
+ val = 3;
+ }
+
+ priv->rgmii_tx_delay = val;
+ break;
+ default:
+ return 0;
+ }
+
+ return 0;
+}
+
static int
qca8k_setup(struct dsa_switch *ds)
{
@@ -802,6 +864,10 @@ qca8k_setup(struct dsa_switch *ds)
if (ret)
return ret;
+ ret = qca8k_setup_of_rgmii_delay(priv);
+ if (ret)
+ return ret;
+
/* Enable CPU Port */
ret = qca8k_reg_set(priv, QCA8K_REG_GLOBAL_FW_CTRL0,
QCA8K_GLOBAL_FW_CTRL0_CPU_PORT_EN);
@@ -970,6 +1036,8 @@ qca8k_phylink_mac_config(struct dsa_switch *ds, int port, unsigned int mode,
case 0: /* 1st CPU port */
if (state->interface != PHY_INTERFACE_MODE_RGMII &&
state->interface != PHY_INTERFACE_MODE_RGMII_ID &&
+ state->interface != PHY_INTERFACE_MODE_RGMII_TXID &&
+ state->interface != PHY_INTERFACE_MODE_RGMII_RXID &&
state->interface != PHY_INTERFACE_MODE_SGMII)
return;
@@ -985,6 +1053,8 @@ qca8k_phylink_mac_config(struct dsa_switch *ds, int port, unsigned int mode,
case 6: /* 2nd CPU port / external PHY */
if (state->interface != PHY_INTERFACE_MODE_RGMII &&
state->interface != PHY_INTERFACE_MODE_RGMII_ID &&
+ state->interface != PHY_INTERFACE_MODE_RGMII_TXID &&
+ state->interface != PHY_INTERFACE_MODE_RGMII_RXID &&
state->interface != PHY_INTERFACE_MODE_SGMII &&
state->interface != PHY_INTERFACE_MODE_1000BASEX)
return;
@@ -1008,14 +1078,18 @@ qca8k_phylink_mac_config(struct dsa_switch *ds, int port, unsigned int mode,
qca8k_write(priv, reg, QCA8K_PORT_PAD_RGMII_EN);
break;
case PHY_INTERFACE_MODE_RGMII_ID:
+ case PHY_INTERFACE_MODE_RGMII_TXID:
+ case PHY_INTERFACE_MODE_RGMII_RXID:
/* RGMII_ID needs internal delay. This is enabled through
* PORT5_PAD_CTRL for all ports, rather than individual port
* registers
*/
qca8k_write(priv, reg,
QCA8K_PORT_PAD_RGMII_EN |
- QCA8K_PORT_PAD_RGMII_TX_DELAY(QCA8K_MAX_DELAY) |
- QCA8K_PORT_PAD_RGMII_RX_DELAY(QCA8K_MAX_DELAY));
+ QCA8K_PORT_PAD_RGMII_TX_DELAY(priv->rgmii_tx_delay) |
+ QCA8K_PORT_PAD_RGMII_RX_DELAY(priv->rgmii_rx_delay) |
+ QCA8K_PORT_PAD_RGMII_TX_DELAY_EN |
+ QCA8K_PORT_PAD_RGMII_RX_DELAY_EN);
/* QCA8337 requires to set rgmii rx delay */
if (priv->switch_id == QCA8K_ID_QCA8337)
qca8k_write(priv, QCA8K_REG_PORT5_PAD_CTRL,
@@ -1073,6 +1147,8 @@ qca8k_phylink_validate(struct dsa_switch *ds, int port,
if (state->interface != PHY_INTERFACE_MODE_NA &&
state->interface != PHY_INTERFACE_MODE_RGMII &&
state->interface != PHY_INTERFACE_MODE_RGMII_ID &&
+ state->interface != PHY_INTERFACE_MODE_RGMII_TXID &&
+ state->interface != PHY_INTERFACE_MODE_RGMII_RXID &&
state->interface != PHY_INTERFACE_MODE_SGMII)
goto unsupported;
break;
@@ -1090,6 +1166,8 @@ qca8k_phylink_validate(struct dsa_switch *ds, int port,
if (state->interface != PHY_INTERFACE_MODE_NA &&
state->interface != PHY_INTERFACE_MODE_RGMII &&
state->interface != PHY_INTERFACE_MODE_RGMII_ID &&
+ state->interface != PHY_INTERFACE_MODE_RGMII_TXID &&
+ state->interface != PHY_INTERFACE_MODE_RGMII_RXID &&
state->interface != PHY_INTERFACE_MODE_SGMII &&
state->interface != PHY_INTERFACE_MODE_1000BASEX)
goto unsupported;
diff --git a/drivers/net/dsa/qca8k.h b/drivers/net/dsa/qca8k.h
index 338277978ec0..a878486d9bcd 100644
--- a/drivers/net/dsa/qca8k.h
+++ b/drivers/net/dsa/qca8k.h
@@ -38,12 +38,11 @@
#define QCA8K_REG_PORT5_PAD_CTRL 0x008
#define QCA8K_REG_PORT6_PAD_CTRL 0x00c
#define QCA8K_PORT_PAD_RGMII_EN BIT(26)
-#define QCA8K_PORT_PAD_RGMII_TX_DELAY(x) \
- ((0x8 + (x & 0x3)) << 22)
-#define QCA8K_PORT_PAD_RGMII_RX_DELAY(x) \
- ((0x10 + (x & 0x3)) << 20)
-#define QCA8K_MAX_DELAY 3
+#define QCA8K_PORT_PAD_RGMII_TX_DELAY(x) ((x) << 22)
+#define QCA8K_PORT_PAD_RGMII_RX_DELAY(x) ((x) << 20)
+#define QCA8K_PORT_PAD_RGMII_TX_DELAY_EN BIT(25)
#define QCA8K_PORT_PAD_RGMII_RX_DELAY_EN BIT(24)
+#define QCA8K_MAX_DELAY 3
#define QCA8K_PORT_PAD_SGMII_EN BIT(7)
#define QCA8K_REG_PWS 0x010
#define QCA8K_PWS_SERDES_AEN_DIS BIT(7)
@@ -254,6 +253,8 @@ struct qca8k_match_data {
struct qca8k_priv {
u8 switch_id;
u8 switch_revision;
+ u8 rgmii_tx_delay;
+ u8 rgmii_rx_delay;
struct regmap *regmap;
struct mii_bus *bus;
struct ar8xxx_port_status port_sts[QCA8K_NUM_PORTS];
--
2.30.2
next prev parent reply other threads:[~2021-05-14 21:01 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-14 20:59 [PATCH net-next v6 00/25] Multiple improvement to qca8k stability Ansuel Smith
2021-05-14 20:59 ` [PATCH net-next v6 01/25] net: dsa: qca8k: change simple print to dev variant Ansuel Smith
2021-05-14 22:43 ` Russell King (Oracle)
2021-05-14 20:59 ` [PATCH net-next v6 02/25] net: dsa: qca8k: use iopoll macro for qca8k_busy_wait Ansuel Smith
2021-05-14 22:52 ` Russell King (Oracle)
2021-05-14 23:07 ` Ansuel Smith
2021-05-14 20:59 ` [PATCH net-next v6 03/25] net: dsa: qca8k: improve qca8k read/write/rmw bus access Ansuel Smith
2021-05-14 22:53 ` Russell King (Oracle)
2021-05-14 20:59 ` [PATCH net-next v6 04/25] net: dsa: qca8k: handle qca8k_set_page errors Ansuel Smith
2021-05-14 22:55 ` Russell King (Oracle)
2021-05-14 20:59 ` [PATCH net-next v6 05/25] net: dsa: qca8k: handle error with qca8k_read operation Ansuel Smith
2021-05-14 23:01 ` Russell King (Oracle)
2021-05-14 20:59 ` [PATCH net-next v6 06/25] net: dsa: qca8k: handle error with qca8k_write operation Ansuel Smith
2021-05-14 20:59 ` [PATCH net-next v6 07/25] net: dsa: qca8k: handle error with qca8k_rmw operation Ansuel Smith
2021-05-14 20:59 ` [PATCH net-next v6 08/25] net: dsa: qca8k: handle error from qca8k_busy_wait Ansuel Smith
2021-05-14 20:59 ` [PATCH net-next v6 09/25] net: dsa: qca8k: add support for qca8327 switch Ansuel Smith
2021-05-14 21:00 ` [PATCH net-next v6 10/25] devicetree: net: dsa: qca8k: Document new compatible qca8327 Ansuel Smith
2021-05-14 21:00 ` [PATCH net-next v6 11/25] net: dsa: qca8k: add priority tweak to qca8337 switch Ansuel Smith
2021-05-14 21:00 ` [PATCH net-next v6 12/25] net: dsa: qca8k: limit port5 delay to qca8337 Ansuel Smith
2021-05-14 21:00 ` [PATCH net-next v6 13/25] net: dsa: qca8k: add GLOBAL_FC settings needed for qca8327 Ansuel Smith
2021-05-14 21:00 ` [PATCH net-next v6 14/25] net: dsa: qca8k: add support for switch rev Ansuel Smith
2021-05-14 21:00 ` [PATCH net-next v6 15/25] net: dsa: qca8k: add ethernet-ports fallback to setup_mdio_bus Ansuel Smith
2021-05-14 21:00 ` Ansuel Smith [this message]
2021-05-14 21:00 ` [PATCH net-next v6 17/25] net: dsa: qca8k: clear MASTER_EN after phy read/write Ansuel Smith
2021-05-14 21:00 ` [PATCH net-next v6 18/25] net: dsa: qca8k: dsa: qca8k: protect MASTER busy_wait with mdio mutex Ansuel Smith
2021-05-14 21:00 ` [PATCH net-next v6 19/25] net: dsa: qca8k: enlarge mdio delay and timeout Ansuel Smith
2021-05-14 21:00 ` [PATCH net-next v6 20/25] net: dsa: qca8k: add support for internal phy and internal mdio Ansuel Smith
2021-05-14 21:00 ` [PATCH net-next v6 21/25] devicetree: bindings: dsa: qca8k: Document internal mdio definition Ansuel Smith
2021-05-14 21:00 ` [PATCH net-next v6 22/25] net: dsa: qca8k: improve internal mdio read/write bus access Ansuel Smith
2021-05-14 21:00 ` [PATCH net-next v6 23/25] net: dsa: qca8k: pass switch_revision info to phy dev_flags Ansuel Smith
2021-05-14 21:00 ` [PATCH net-next v6 24/25] net: phy: at803x: clean whitespace errors Ansuel Smith
2021-05-14 21:00 ` [PATCH net-next v6 25/25] net: phy: add support for qca8k switch internal PHY in at803x Ansuel Smith
2021-05-14 22:40 ` [PATCH net-next v6 00/25] Multiple improvement to qca8k stability patchwork-bot+netdevbpf
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