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Message-Id: <20190826175920.21043-1-marek.behun@nic.cz>
Date: Mon, 26 Aug 2019 19:59:20 +0200
From: Marek Behún <marek.behun@....cz>
To: Vivien Didelot <vivien.didelot@...il.com>
Cc: netdev@...r.kernel.org, Andrew Lunn <andrew@...n.ch>,
Florian Fainelli <f.fainelli@...il.com>,
Vladimir Oltean <olteanv@...il.com>,
Marek Behún <marek.behun@....cz>
Subject: [PATCH RFC] net: dsa: mv88e6xxx: fully support SERDES on Topaz family
Currently we support SERDES on the Topaz family in a limited way: no
IRQs and the cmode is not writable, thus the mode is determined by
strapping pins.
Marvell's examples though show how to make cmode writable on port 5 and
support SGMII autonegotiation. It is done by writing hidden registers,
for which we already have code.
This patch adds support for making the cmode for the SERDES port
writable on the Topaz family, at setup, by calling a new chip operation,
port_setup_extra. This operation is implemented for Topaz.
Then it enables cmode setting and SERDES IRQs for Topaz.
Tested on Turris Mox.
Signed-off-by: Marek Behún <marek.behun@....cz>
---
drivers/net/dsa/mv88e6xxx/chip.c | 15 ++++++++
drivers/net/dsa/mv88e6xxx/chip.h | 3 ++
drivers/net/dsa/mv88e6xxx/port.c | 65 ++++++++++++++++++++++++++++++--
drivers/net/dsa/mv88e6xxx/port.h | 5 +++
4 files changed, 85 insertions(+), 3 deletions(-)
diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 202ccce65b1c..9fee2cfe469f 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -2121,6 +2121,13 @@ static int mv88e6xxx_setup_port(struct mv88e6xxx_chip *chip, int port)
chip->ports[port].chip = chip;
chip->ports[port].port = port;
+ /* Some ports may need extra setup to be used as desired */
+ if (chip->info->ops->port_setup_extra) {
+ err = chip->info->ops->port_setup_extra(chip, port);
+ if (err)
+ return err;
+ }
+
/* MAC Forcing register: don't force link, speed, duplex or flow control
* state to any particular values on physical ports, but force the CPU
* port and all DSA ports to their maximum bandwidth and full duplex.
@@ -2913,7 +2920,9 @@ static const struct mv88e6xxx_ops mv88e6141_ops = {
.port_disable_pri_override = mv88e6xxx_port_disable_pri_override,
.port_link_state = mv88e6352_port_link_state,
.port_get_cmode = mv88e6352_port_get_cmode,
+ .port_set_cmode = mv88e6341_port_set_cmode,
.port_setup_message_port = mv88e6xxx_setup_message_port,
+ .port_setup_extra = mv88e6341_port_setup_extra,
.stats_snapshot = mv88e6390_g1_stats_snapshot,
.stats_set_histogram = mv88e6095_g1_stats_set_histogram,
.stats_get_sset_count = mv88e6320_stats_get_sset_count,
@@ -2929,6 +2938,8 @@ static const struct mv88e6xxx_ops mv88e6141_ops = {
.vtu_loadpurge = mv88e6352_g1_vtu_loadpurge,
.serdes_power = mv88e6390_serdes_power,
.serdes_get_lane = mv88e6341_serdes_get_lane,
+ .serdes_irq_setup = mv88e6390_serdes_irq_setup,
+ .serdes_irq_free = mv88e6390_serdes_irq_free,
.gpio_ops = &mv88e6352_gpio_ops,
.phylink_validate = mv88e6341_phylink_validate,
};
@@ -3608,7 +3619,9 @@ static const struct mv88e6xxx_ops mv88e6341_ops = {
.port_disable_pri_override = mv88e6xxx_port_disable_pri_override,
.port_link_state = mv88e6352_port_link_state,
.port_get_cmode = mv88e6352_port_get_cmode,
+ .port_set_cmode = mv88e6341_port_set_cmode,
.port_setup_message_port = mv88e6xxx_setup_message_port,
+ .port_setup_extra = mv88e6341_port_setup_extra,
.stats_snapshot = mv88e6390_g1_stats_snapshot,
.stats_set_histogram = mv88e6095_g1_stats_set_histogram,
.stats_get_sset_count = mv88e6320_stats_get_sset_count,
@@ -3624,6 +3637,8 @@ static const struct mv88e6xxx_ops mv88e6341_ops = {
.vtu_loadpurge = mv88e6352_g1_vtu_loadpurge,
.serdes_power = mv88e6390_serdes_power,
.serdes_get_lane = mv88e6341_serdes_get_lane,
+ .serdes_irq_setup = mv88e6390_serdes_irq_setup,
+ .serdes_irq_free = mv88e6390_serdes_irq_free,
.gpio_ops = &mv88e6352_gpio_ops,
.avb_ops = &mv88e6390_avb_ops,
.ptp_ops = &mv88e6352_ptp_ops,
diff --git a/drivers/net/dsa/mv88e6xxx/chip.h b/drivers/net/dsa/mv88e6xxx/chip.h
index 15d0c9f00f54..905e4136bccf 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.h
+++ b/drivers/net/dsa/mv88e6xxx/chip.h
@@ -397,6 +397,9 @@ struct mv88e6xxx_ops {
int (*port_disable_pri_override)(struct mv88e6xxx_chip *chip, int port);
int (*port_setup_message_port)(struct mv88e6xxx_chip *chip, int port);
+ /* Some ports may need extra setup to be used as desired */
+ int (*port_setup_extra)(struct mv88e6xxx_chip *chip, int port);
+
/* CMODE control what PHY mode the MAC will use, eg. SGMII, RGMII, etc.
* Some chips allow this to be configured on specific ports.
*/
diff --git a/drivers/net/dsa/mv88e6xxx/port.c b/drivers/net/dsa/mv88e6xxx/port.c
index 7183c94a92ec..6886accbcb60 100644
--- a/drivers/net/dsa/mv88e6xxx/port.c
+++ b/drivers/net/dsa/mv88e6xxx/port.c
@@ -392,8 +392,35 @@ phy_interface_t mv88e6390x_port_max_speed_mode(int port)
return PHY_INTERFACE_MODE_NA;
}
-int mv88e6390x_port_set_cmode(struct mv88e6xxx_chip *chip, int port,
- phy_interface_t mode)
+/* Port 5 on Topaz is a SERDES port as ports 9 and 10 on Peridot family,
+ but on Topaz it's cmode is not writable by default. This hidden register
+ configuration makes it writable. */
+int mv88e6341_port_setup_extra(struct mv88e6xxx_chip *chip, int port)
+{
+ int err, addr;
+ u16 reg, bits;
+
+ if (port != 5)
+ return 0;
+
+ addr = chip->info->port_base_addr + port;
+
+ err = mv88e6xxx_port_hidden_read(chip, 0x7, addr, 0, ®);
+ if (err)
+ return err;
+
+ bits = MV88E6341_PORT_RESERVED_1A_FORCE_CMODE |
+ MV88E6341_PORT_RESERVED_1A_SGMII_AN;
+
+ if ((reg & bits) == bits)
+ return 0;
+
+ reg |= bits;
+ return mv88e6xxx_port_hidden_write(chip, 0x7, addr, 0, reg);
+}
+
+static int mv88e6xxx_port_set_cmode(struct mv88e6xxx_chip *chip, int port,
+ phy_interface_t mode)
{
s8 lane;
u16 cmode;
@@ -484,9 +511,41 @@ int mv88e6390x_port_set_cmode(struct mv88e6xxx_chip *chip, int port,
return 0;
}
+int mv88e6390x_port_set_cmode(struct mv88e6xxx_chip *chip, int port,
+ phy_interface_t mode)
+{
+ if (port != 9 && port != 10)
+ return -EOPNOTSUPP;
+
+ return mv88e6xxx_port_set_cmode(chip, port, mode);
+}
+
int mv88e6390_port_set_cmode(struct mv88e6xxx_chip *chip, int port,
phy_interface_t mode)
{
+ if (port != 9 && port != 10)
+ return -EOPNOTSUPP;
+
+ switch (mode) {
+ case PHY_INTERFACE_MODE_NA:
+ return 0;
+ case PHY_INTERFACE_MODE_XGMII:
+ case PHY_INTERFACE_MODE_XAUI:
+ case PHY_INTERFACE_MODE_RXAUI:
+ return -EINVAL;
+ default:
+ break;
+ }
+
+ return mv88e6xxx_port_set_cmode(chip, port, mode);
+}
+
+int mv88e6341_port_set_cmode(struct mv88e6xxx_chip *chip, int port,
+ phy_interface_t mode)
+{
+ if (port != 5)
+ return -EOPNOTSUPP;
+
switch (mode) {
case PHY_INTERFACE_MODE_NA:
return 0;
@@ -498,7 +557,7 @@ int mv88e6390_port_set_cmode(struct mv88e6xxx_chip *chip, int port,
break;
}
- return mv88e6390x_port_set_cmode(chip, port, mode);
+ return mv88e6xxx_port_set_cmode(chip, port, mode);
}
int mv88e6185_port_get_cmode(struct mv88e6xxx_chip *chip, int port, u8 *cmode)
diff --git a/drivers/net/dsa/mv88e6xxx/port.h b/drivers/net/dsa/mv88e6xxx/port.h
index 6d7a067da0f5..eb19e568ad9b 100644
--- a/drivers/net/dsa/mv88e6xxx/port.h
+++ b/drivers/net/dsa/mv88e6xxx/port.h
@@ -269,6 +269,8 @@
#define MV88E6XXX_PORT_RESERVED_1A_BLOCK_SHIFT 10
#define MV88E6XXX_PORT_RESERVED_1A_CTRL_PORT 0x04
#define MV88E6XXX_PORT_RESERVED_1A_DATA_PORT 0x05
+#define MV88E6341_PORT_RESERVED_1A_FORCE_CMODE 0x8000
+#define MV88E6341_PORT_RESERVED_1A_SGMII_AN 0x2000
int mv88e6xxx_port_read(struct mv88e6xxx_chip *chip, int port, int reg,
u16 *val);
@@ -334,6 +336,9 @@ int mv88e6097_port_pause_limit(struct mv88e6xxx_chip *chip, int port, u8 in,
u8 out);
int mv88e6390_port_pause_limit(struct mv88e6xxx_chip *chip, int port, u8 in,
u8 out);
+int mv88e6341_port_setup_extra(struct mv88e6xxx_chip *chip, int port);
+int mv88e6341_port_set_cmode(struct mv88e6xxx_chip *chip, int port,
+ phy_interface_t mode);
int mv88e6390_port_set_cmode(struct mv88e6xxx_chip *chip, int port,
phy_interface_t mode);
int mv88e6390x_port_set_cmode(struct mv88e6xxx_chip *chip, int port,
--
2.21.0
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