[PATCH net-next 01/12] net: dsa: mt7530: Separate C22 and C45 MDIO bus transactions
From: Michael Walle
Date: Mon Jan 16 2023 - 18:53:12 EST
From: Andrew Lunn <andrew@xxxxxxx>
mt7530 does support C45, but its uses a mix of registering its MDIO
bus and providing its private MDIO bus to the DSA core, too. This makes
the change a bit more complex.
Signed-off-by: Andrew Lunn <andrew@xxxxxxx>
Signed-off-by: Michael Walle <michael@xxxxxxxx>
---
v3 (the 'new' v1):
[mw] Remove dsa core comment
[mw] Rephrase commit message
v2:
[al] Remove conditional c45, since all switches support c45
[al] Remove dsa core changes, they are not needed
[al] Add comment that DSA provided MDIO bus is C22 only.
---
drivers/net/dsa/mt7530.c | 87 ++++++++++++++++++++++++------------------------
drivers/net/dsa/mt7530.h | 15 ++++++---
2 files changed, 55 insertions(+), 47 deletions(-)
diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index 908fa89444c9..616b21c90d05 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -608,17 +608,29 @@ mt7530_mib_reset(struct dsa_switch *ds)
mt7530_write(priv, MT7530_MIB_CCR, CCR_MIB_ACTIVATE);
}
-static int mt7530_phy_read(struct mt7530_priv *priv, int port, int regnum)
+static int mt7530_phy_read_c22(struct mt7530_priv *priv, int port, int regnum)
{
return mdiobus_read_nested(priv->bus, port, regnum);
}
-static int mt7530_phy_write(struct mt7530_priv *priv, int port, int regnum,
- u16 val)
+static int mt7530_phy_write_c22(struct mt7530_priv *priv, int port, int regnum,
+ u16 val)
{
return mdiobus_write_nested(priv->bus, port, regnum, val);
}
+static int mt7530_phy_read_c45(struct mt7530_priv *priv, int port,
+ int devad, int regnum)
+{
+ return mdiobus_c45_read_nested(priv->bus, port, devad, regnum);
+}
+
+static int mt7530_phy_write_c45(struct mt7530_priv *priv, int port, int devad,
+ int regnum, u16 val)
+{
+ return mdiobus_c45_write_nested(priv->bus, port, devad, regnum, val);
+}
+
static int
mt7531_ind_c45_phy_read(struct mt7530_priv *priv, int port, int devad,
int regnum)
@@ -670,7 +682,7 @@ mt7531_ind_c45_phy_read(struct mt7530_priv *priv, int port, int devad,
static int
mt7531_ind_c45_phy_write(struct mt7530_priv *priv, int port, int devad,
- int regnum, u32 data)
+ int regnum, u16 data)
{
struct mii_bus *bus = priv->bus;
struct mt7530_dummy_poll p;
@@ -793,55 +805,36 @@ mt7531_ind_c22_phy_write(struct mt7530_priv *priv, int port, int regnum,
}
static int
-mt7531_ind_phy_read(struct mt7530_priv *priv, int port, int regnum)
+mt753x_phy_read_c22(struct mii_bus *bus, int port, int regnum)
{
- int devad;
- int ret;
-
- if (regnum & MII_ADDR_C45) {
- devad = (regnum >> MII_DEVADDR_C45_SHIFT) & 0x1f;
- ret = mt7531_ind_c45_phy_read(priv, port, devad,
- regnum & MII_REGADDR_C45_MASK);
- } else {
- ret = mt7531_ind_c22_phy_read(priv, port, regnum);
- }
+ struct mt7530_priv *priv = bus->priv;
- return ret;
+ return priv->info->phy_read_c22(priv, port, regnum);
}
static int
-mt7531_ind_phy_write(struct mt7530_priv *priv, int port, int regnum,
- u16 data)
+mt753x_phy_read_c45(struct mii_bus *bus, int port, int devad, int regnum)
{
- int devad;
- int ret;
-
- if (regnum & MII_ADDR_C45) {
- devad = (regnum >> MII_DEVADDR_C45_SHIFT) & 0x1f;
- ret = mt7531_ind_c45_phy_write(priv, port, devad,
- regnum & MII_REGADDR_C45_MASK,
- data);
- } else {
- ret = mt7531_ind_c22_phy_write(priv, port, regnum, data);
- }
+ struct mt7530_priv *priv = bus->priv;
- return ret;
+ return priv->info->phy_read_c45(priv, port, devad, regnum);
}
static int
-mt753x_phy_read(struct mii_bus *bus, int port, int regnum)
+mt753x_phy_write_c22(struct mii_bus *bus, int port, int regnum, u16 val)
{
struct mt7530_priv *priv = bus->priv;
- return priv->info->phy_read(priv, port, regnum);
+ return priv->info->phy_write_c22(priv, port, regnum, val);
}
static int
-mt753x_phy_write(struct mii_bus *bus, int port, int regnum, u16 val)
+mt753x_phy_write_c45(struct mii_bus *bus, int port, int devad, int regnum,
+ u16 val)
{
struct mt7530_priv *priv = bus->priv;
- return priv->info->phy_write(priv, port, regnum, val);
+ return priv->info->phy_write_c45(priv, port, devad, regnum, val);
}
static void
@@ -2086,8 +2079,10 @@ mt7530_setup_mdio(struct mt7530_priv *priv)
bus->priv = priv;
bus->name = KBUILD_MODNAME "-mii";
snprintf(bus->id, MII_BUS_ID_SIZE, KBUILD_MODNAME "-%d", idx++);
- bus->read = mt753x_phy_read;
- bus->write = mt753x_phy_write;
+ bus->read = mt753x_phy_read_c22;
+ bus->write = mt753x_phy_write_c22;
+ bus->read_c45 = mt753x_phy_read_c45;
+ bus->write_c45 = mt753x_phy_write_c45;
bus->parent = dev;
bus->phy_mask = ~ds->phys_mii_mask;
@@ -3182,8 +3177,10 @@ static const struct mt753x_info mt753x_table[] = {
.id = ID_MT7621,
.pcs_ops = &mt7530_pcs_ops,
.sw_setup = mt7530_setup,
- .phy_read = mt7530_phy_read,
- .phy_write = mt7530_phy_write,
+ .phy_read_c22 = mt7530_phy_read_c22,
+ .phy_write_c22 = mt7530_phy_write_c22,
+ .phy_read_c45 = mt7530_phy_read_c45,
+ .phy_write_c45 = mt7530_phy_write_c45,
.pad_setup = mt7530_pad_clk_setup,
.mac_port_get_caps = mt7530_mac_port_get_caps,
.mac_port_config = mt7530_mac_config,
@@ -3192,8 +3189,10 @@ static const struct mt753x_info mt753x_table[] = {
.id = ID_MT7530,
.pcs_ops = &mt7530_pcs_ops,
.sw_setup = mt7530_setup,
- .phy_read = mt7530_phy_read,
- .phy_write = mt7530_phy_write,
+ .phy_read_c22 = mt7530_phy_read_c22,
+ .phy_write_c22 = mt7530_phy_write_c22,
+ .phy_read_c45 = mt7530_phy_read_c45,
+ .phy_write_c45 = mt7530_phy_write_c45,
.pad_setup = mt7530_pad_clk_setup,
.mac_port_get_caps = mt7530_mac_port_get_caps,
.mac_port_config = mt7530_mac_config,
@@ -3202,8 +3201,10 @@ static const struct mt753x_info mt753x_table[] = {
.id = ID_MT7531,
.pcs_ops = &mt7531_pcs_ops,
.sw_setup = mt7531_setup,
- .phy_read = mt7531_ind_phy_read,
- .phy_write = mt7531_ind_phy_write,
+ .phy_read_c22 = mt7531_ind_c22_phy_read,
+ .phy_write_c22 = mt7531_ind_c22_phy_write,
+ .phy_read_c45 = mt7531_ind_c45_phy_read,
+ .phy_write_c45 = mt7531_ind_c45_phy_write,
.pad_setup = mt7531_pad_setup,
.cpu_port_config = mt7531_cpu_port_config,
.mac_port_get_caps = mt7531_mac_port_get_caps,
@@ -3263,7 +3264,7 @@ mt7530_probe(struct mdio_device *mdiodev)
* properly.
*/
if (!priv->info->sw_setup || !priv->info->pad_setup ||
- !priv->info->phy_read || !priv->info->phy_write ||
+ !priv->info->phy_read_c22 || !priv->info->phy_write_c22 ||
!priv->info->mac_port_get_caps ||
!priv->info->mac_port_config)
return -EINVAL;
diff --git a/drivers/net/dsa/mt7530.h b/drivers/net/dsa/mt7530.h
index e8d966435350..6b2fc6290ea8 100644
--- a/drivers/net/dsa/mt7530.h
+++ b/drivers/net/dsa/mt7530.h
@@ -750,8 +750,10 @@ struct mt753x_pcs {
/* struct mt753x_info - This is the main data structure for holding the specific
* part for each supported device
* @sw_setup: Holding the handler to a device initialization
- * @phy_read: Holding the way reading PHY port
- * @phy_write: Holding the way writing PHY port
+ * @phy_read_c22: Holding the way reading PHY port using C22
+ * @phy_write_c22: Holding the way writing PHY port using C22
+ * @phy_read_c45: Holding the way reading PHY port using C45
+ * @phy_write_c45: Holding the way writing PHY port using C45
* @pad_setup: Holding the way setting up the bus pad for a certain
* MAC port
* @phy_mode_supported: Check if the PHY type is being supported on a certain
@@ -767,8 +769,13 @@ struct mt753x_info {
const struct phylink_pcs_ops *pcs_ops;
int (*sw_setup)(struct dsa_switch *ds);
- int (*phy_read)(struct mt7530_priv *priv, int port, int regnum);
- int (*phy_write)(struct mt7530_priv *priv, int port, int regnum, u16 val);
+ int (*phy_read_c22)(struct mt7530_priv *priv, int port, int regnum);
+ int (*phy_write_c22)(struct mt7530_priv *priv, int port, int regnum,
+ u16 val);
+ int (*phy_read_c45)(struct mt7530_priv *priv, int port, int devad,
+ int regnum);
+ int (*phy_write_c45)(struct mt7530_priv *priv, int port, int devad,
+ int regnum, u16 val);
int (*pad_setup)(struct dsa_switch *ds, phy_interface_t interface);
int (*cpu_port_config)(struct dsa_switch *ds, int port);
void (*mac_port_get_caps)(struct dsa_switch *ds, int port,
--
2.30.2