net: dsa: mv88e6xxx: Refactor mv88e6352 SERDES code into an op

The mv88e6390 family has a different SERDES implementation. Refactor
the mv88e6352 code into an ops function, so we can later add the
mv88e6390 code.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/dsa/mv88e6xxx/Makefile b/drivers/net/dsa/mv88e6xxx/Makefile
index e4372eaf3bc57244945020e5444a8336efef1359..5cd5551461e3c4b6a8b0bbb135c804214cdb0b37 100644 (file)
--- a/drivers/net/dsa/mv88e6xxx/Makefile
+++ b/drivers/net/dsa/mv88e6xxx/Makefile
@@ -6,3 +6,4 @@ mv88e6xxx-objs += global1_vtu.o
 mv88e6xxx-$(CONFIG_NET_DSA_MV88E6XXX_GLOBAL2) += global2.o
 mv88e6xxx-objs += phy.o
 mv88e6xxx-objs += port.o
+mv88e6xxx-objs += serdes.o

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 724f3b09e0773242345de4e0f1edf64bb28c9446..bc7b345d91d3014b861397ffbd4d4df5d5c9a560 100644 (file)
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -38,6 +38,7 @@
 #include "global2.h"
 #include "phy.h"
 #include "port.h"
+#include "serdes.h"
 
 static void assert_reg_lock(struct mv88e6xxx_chip *chip)
 {
@@ -234,18 +235,6 @@ struct mii_bus *mv88e6xxx_default_mdio_bus(struct mv88e6xxx_chip *chip)
        return mdio_bus->bus;
 }
 
-static int mv88e6xxx_serdes_read(struct mv88e6xxx_chip *chip, int reg, u16 *val)
-{
-       return mv88e6xxx_phy_page_read(chip, ADDR_SERDES, SERDES_PAGE_FIBER,
-                                      reg, val);
-}
-
-static int mv88e6xxx_serdes_write(struct mv88e6xxx_chip *chip, int reg, u16 val)
-{
-       return mv88e6xxx_phy_page_write(chip, ADDR_SERDES, SERDES_PAGE_FIBER,
-                                       reg, val);
-}
-
 static void mv88e6xxx_g1_irq_mask(struct irq_data *d)
 {
        struct mv88e6xxx_chip *chip = irq_data_get_irq_chip_data(d);
@@ -1733,24 +1722,6 @@ static int mv88e6xxx_switch_reset(struct mv88e6xxx_chip *chip)
        return mv88e6xxx_software_reset(chip);
 }
 
-static int mv88e6xxx_serdes_power_on(struct mv88e6xxx_chip *chip)
-{
-       u16 val;
-       int err;
-
-       /* Clear Power Down bit */
-       err = mv88e6xxx_serdes_read(chip, MII_BMCR, &val);
-       if (err)
-               return err;
-
-       if (val & BMCR_PDOWN) {
-               val &= ~BMCR_PDOWN;
-               err = mv88e6xxx_serdes_write(chip, MII_BMCR, val);
-       }
-
-       return err;
-}
-
 static int mv88e6xxx_set_port_mode(struct mv88e6xxx_chip *chip, int port,
                                   enum mv88e6xxx_frame_mode frame, u16 egress,
                                   u16 etype)
@@ -1832,6 +1803,15 @@ static int mv88e6xxx_setup_egress_floods(struct mv88e6xxx_chip *chip, int port)
        return 0;
 }
 
+static int mv88e6xxx_serdes_power(struct mv88e6xxx_chip *chip, int port,
+                                 bool on)
+{
+       if (chip->info->ops->serdes_power)
+               return chip->info->ops->serdes_power(chip, port, on);
+
+       return 0;
+}
+
 static int mv88e6xxx_setup_port(struct mv88e6xxx_chip *chip, int port)
 {
        struct dsa_switch *ds = chip->ds;
@@ -1882,22 +1862,12 @@ static int mv88e6xxx_setup_port(struct mv88e6xxx_chip *chip, int port)
        if (err)
                return err;
 
-       /* If this port is connected to a SerDes, make sure the SerDes is not
-        * powered down.
+       /* If this port is connected to a SerDes, make sure the SerDes is
+        * powered up.
         */
-       if (mv88e6xxx_has(chip, MV88E6XXX_FLAGS_SERDES)) {
-               err = mv88e6xxx_port_read(chip, port, PORT_STATUS, &reg);
-               if (err)
-                       return err;
-               reg &= PORT_STATUS_CMODE_MASK;
-               if ((reg == PORT_STATUS_CMODE_100BASE_X) ||
-                   (reg == PORT_STATUS_CMODE_1000BASE_X) ||
-                   (reg == PORT_STATUS_CMODE_SGMII)) {
-                       err = mv88e6xxx_serdes_power_on(chip);
-                       if (err < 0)
-                               return err;
-               }
-       }
+       err = mv88e6xxx_serdes_power(chip, port, true);
+       if (err)
+               return err;
 
        /* Port Control 2: don't force a good FCS, set the maximum frame size to
         * 10240 bytes, disable 802.1q tags checking, don't discard tagged or
@@ -2662,6 +2632,7 @@ static const struct mv88e6xxx_ops mv88e6172_ops = {
        .reset = mv88e6352_g1_reset,
        .vtu_getnext = mv88e6352_g1_vtu_getnext,
        .vtu_loadpurge = mv88e6352_g1_vtu_loadpurge,
+       .serdes_power = mv88e6352_serdes_power,
 };
 
 static const struct mv88e6xxx_ops mv88e6175_ops = {
@@ -2726,6 +2697,7 @@ static const struct mv88e6xxx_ops mv88e6176_ops = {
        .reset = mv88e6352_g1_reset,
        .vtu_getnext = mv88e6352_g1_vtu_getnext,
        .vtu_loadpurge = mv88e6352_g1_vtu_loadpurge,
+       .serdes_power = mv88e6352_serdes_power,
 };
 
 static const struct mv88e6xxx_ops mv88e6185_ops = {
@@ -2882,6 +2854,7 @@ static const struct mv88e6xxx_ops mv88e6240_ops = {
        .reset = mv88e6352_g1_reset,
        .vtu_getnext = mv88e6352_g1_vtu_getnext,
        .vtu_loadpurge = mv88e6352_g1_vtu_loadpurge,
+       .serdes_power = mv88e6352_serdes_power,
 };
 
 static const struct mv88e6xxx_ops mv88e6290_ops = {
@@ -3104,6 +3077,7 @@ static const struct mv88e6xxx_ops mv88e6352_ops = {
        .reset = mv88e6352_g1_reset,
        .vtu_getnext = mv88e6352_g1_vtu_getnext,
        .vtu_loadpurge = mv88e6352_g1_vtu_loadpurge,
+       .serdes_power = mv88e6352_serdes_power,
 };
 
 static const struct mv88e6xxx_ops mv88e6390_ops = {

diff --git a/drivers/net/dsa/mv88e6xxx/mv88e6xxx.h b/drivers/net/dsa/mv88e6xxx/mv88e6xxx.h
index 45b387c780a88ea6553556442a1c037db5cef6b0..fb996491b11182d56719eae601c245aefb517f35 100644 (file)
--- a/drivers/net/dsa/mv88e6xxx/mv88e6xxx.h
+++ b/drivers/net/dsa/mv88e6xxx/mv88e6xxx.h
@@ -37,9 +37,6 @@
 #define PHY_PAGE               0x16
 #define PHY_PAGE_COPPER                0x00
 
-#define ADDR_SERDES            0x0f
-#define SERDES_PAGE_FIBER      0x01
-
 #define PORT_STATUS            0x00
 #define PORT_STATUS_PAUSE_EN   BIT(15)
 #define PORT_STATUS_MY_PAUSE   BIT(14)
@@ -884,6 +881,9 @@ struct mv88e6xxx_ops {
        /* Can be either in g1 or g2, so don't use a prefix */
        int (*mgmt_rsvd2cpu)(struct mv88e6xxx_chip *chip);
 
+       /* Power on/off a SERDES interface */
+       int (*serdes_power)(struct mv88e6xxx_chip *chip, int port, bool on);
+
        /* VLAN Translation Unit operations */
        int (*vtu_getnext)(struct mv88e6xxx_chip *chip,
                           struct mv88e6xxx_vtu_entry *entry);

diff --git a/drivers/net/dsa/mv88e6xxx/serdes.c b/drivers/net/dsa/mv88e6xxx/serdes.c
new file mode 100644 (file)
index 0000000..235f5f0
--- /dev/null
+++ b/drivers/net/dsa/mv88e6xxx/serdes.c
@@ -0,0 +1,75 @@
+/*
+ * Marvell 88E6xxx SERDES manipulation, via SMI bus
+ *
+ * Copyright (c) 2008 Marvell Semiconductor
+ *
+ * Copyright (c) 2017 Andrew Lunn <andrew@lunn.ch>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/mii.h>
+
+#include "mv88e6xxx.h"
+#include "phy.h"
+#include "port.h"
+#include "serdes.h"
+
+static int mv88e6352_serdes_read(struct mv88e6xxx_chip *chip, int reg,
+                                u16 *val)
+{
+       return mv88e6xxx_phy_page_read(chip, MV88E6352_ADDR_SERDES,
+                                      MV88E6352_SERDES_PAGE_FIBER,
+                                      reg, val);
+}
+
+static int mv88e6352_serdes_write(struct mv88e6xxx_chip *chip, int reg,
+                                 u16 val)
+{
+       return mv88e6xxx_phy_page_write(chip, MV88E6352_ADDR_SERDES,
+                                       MV88E6352_SERDES_PAGE_FIBER,
+                                       reg, val);
+}
+
+static int mv88e6352_serdes_power_set(struct mv88e6xxx_chip *chip, bool on)
+{
+       u16 val, new_val;
+       int err;
+
+       err = mv88e6352_serdes_read(chip, MII_BMCR, &val);
+       if (err)
+               return err;
+
+       if (on)
+               new_val = val & ~BMCR_PDOWN;
+       else
+               new_val = val | BMCR_PDOWN;
+
+       if (val != new_val)
+               err = mv88e6352_serdes_write(chip, MII_BMCR, new_val);
+
+       return err;
+}
+
+int mv88e6352_serdes_power(struct mv88e6xxx_chip *chip, int port, bool on)
+{
+       int err;
+       u8 cmode;
+
+       err = mv88e6xxx_port_get_cmode(chip, port, &cmode);
+       if (err)
+               return err;
+
+       if ((cmode == PORT_STATUS_CMODE_100BASE_X) ||
+           (cmode == PORT_STATUS_CMODE_1000BASE_X) ||
+           (cmode == PORT_STATUS_CMODE_SGMII)) {
+               err = mv88e6352_serdes_power_set(chip, on);
+               if (err < 0)
+                       return err;
+       }
+
+       return 0;
+}

diff --git a/drivers/net/dsa/mv88e6xxx/serdes.h b/drivers/net/dsa/mv88e6xxx/serdes.h
new file mode 100644 (file)
index 0000000..a690be0
--- /dev/null
+++ b/drivers/net/dsa/mv88e6xxx/serdes.h
@@ -0,0 +1,24 @@
+/*
+ * Marvell 88E6xxx SERDES manipulation, via SMI bus
+ *
+ * Copyright (c) 2008 Marvell Semiconductor
+ *
+ * Copyright (c) 2016 Andrew Lunn <andrew@lunn.ch>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef _MV88E6XXX_SERDES_H
+#define _MV88E6XXX_SERDES_H
+
+#include "mv88e6xxx.h"
+
+#define MV88E6352_ADDR_SERDES          0x0f
+#define MV88E6352_SERDES_PAGE_FIBER    0x01
+
+int mv88e6352_serdes_power(struct mv88e6xxx_chip *chip, int port, bool on);
+
+#endif