[PATCH net-next v3 3/7] net: dsa: mt7530: store port 5 SGMII capability of MT7531

Arınç ÜNAL via B4 Relay
2024-01-22T05:35:58Z

From: Arınç ÜNAL <arinc.unal@arinc9.com>

Introduce the p5_sgmii field to store the information for whether port 5
has got SGMII or not. Instead of reading the MT7531_TOP_SIG_SR register
multiple times, the register will be read once and the value will be
stored on the p5_sgmii field. This saves unnecessary reads of the
register.

Move the comment about MT7531AE and MT7531BE to mt7531_setup(), where the
switch is identified.

Get rid of mt7531_dual_sgmii_supported() now that priv->p5_sgmii stores the
information. Address the code where mt7531_dual_sgmii_supported() is used.

Get rid of mt7531_is_rgmii_port() which just prints the opposite of
priv->p5_sgmii.

Instead of calling mt7531_pll_setup() then returning, do not call it if
port 5 is SGMII.

Remove P5_INTF_SEL_GMAC5_SGMII. The p5_interface_select enum is supposed to
represent the mode that port 5 is being used in, not the hardware
information of port 5. Set p5_intf_sel to P5_INTF_SEL_GMAC5 instead, if
port 5 is not dsa_is_unused_port().

Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Acked-by: Daniel Golle <daniel@makrotopia.org>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
---
drivers/net/dsa/mt7530-mdio.c | 7 ++-----
drivers/net/dsa/mt7530.c | 48 +++++++++++++++----------------------------
drivers/net/dsa/mt7530.h | 6 ++++--
3 files changed, 22 insertions(+), 39 deletions(-)

diff --git a/drivers/net/dsa/mt7530-mdio.c b/drivers/net/dsa/mt7530-mdio.c
index 088533663b83..fa3ee85a99c1 100644
--- a/drivers/net/dsa/mt7530-mdio.c
+++ b/drivers/net/dsa/mt7530-mdio.c
@@ -81,17 +81,14 @@ static const struct regmap_bus mt7530_regmap_bus = {
};

static int
-mt7531_create_sgmii(struct mt7530_priv *priv, bool dual_sgmii)
+mt7531_create_sgmii(struct mt7530_priv *priv)
{
struct regmap_config *mt7531_pcs_config[2] = {};
struct phylink_pcs *pcs;
struct regmap *regmap;
int i, ret = 0;

- /* MT7531AE has two SGMII units for port 5 and port 6
- * MT7531BE has only one SGMII unit for port 6
- */
- for (i = dual_sgmii ? 0 : 1; i < 2; i++) {
+ for (i = priv->p5_sgmii ? 0 : 1; i < 2; i++) {
mt7531_pcs_config[i] = devm_kzalloc(priv->dev,
sizeof(struct regmap_config),
GFP_KERNEL);
diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index 761c4804449a..c77092506c3f 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -487,15 +487,6 @@ mt7530_pad_clk_setup(struct dsa_switch *ds, phy_interface_t interface)
return 0;
}

-static bool mt7531_dual_sgmii_supported(struct mt7530_priv *priv)
-{
- u32 val;
-
- val = mt7530_read(priv, MT7531_TOP_SIG_SR);
-
- return (val & PAD_DUAL_SGMII_EN) != 0;
-}
-
static int
mt7531_pad_setup(struct dsa_switch *ds, phy_interface_t interface)
{
@@ -510,9 +501,6 @@ mt7531_pll_setup(struct mt7530_priv *priv)
u32 xtal;
u32 val;

- if (mt7531_dual_sgmii_supported(priv))
- return;
-
val = mt7530_read(priv, MT7531_CREV);
top_sig = mt7530_read(priv, MT7531_TOP_SIG_SR);
hwstrap = mt7530_read(priv, MT7531_HWTRAP);
@@ -920,8 +908,6 @@ static const char *p5_intf_modes(unsigned int p5_interface)
return "PHY P4";
case P5_INTF_SEL_GMAC5:
return "GMAC5";
- case P5_INTF_SEL_GMAC5_SGMII:
- return "GMAC5_SGMII";
default:
return "unknown";
}
@@ -2470,6 +2456,12 @@ mt7531_setup(struct dsa_switch *ds)
return -ENODEV;
}

+ /* MT7531AE has got two SGMII units. One for port 5, one for port 6.
+ * MT7531BE has got only one SGMII unit which is for port 6.
+ */
+ val = mt7530_read(priv, MT7531_TOP_SIG_SR);
+ priv->p5_sgmii = !!(val & PAD_DUAL_SGMII_EN);
+
/* all MACs must be forced link-down before sw reset */
for (i = 0; i < MT7530_NUM_PORTS; i++)
mt7530_write(priv, MT7530_PMCR_P(i), MT7531_FORCE_LNK);
@@ -2479,21 +2471,18 @@ mt7531_setup(struct dsa_switch *ds)
SYS_CTRL_PHY_RST | SYS_CTRL_SW_RST |
SYS_CTRL_REG_RST);

- mt7531_pll_setup(priv);
-
- if (mt7531_dual_sgmii_supported(priv)) {
- priv->p5_intf_sel = P5_INTF_SEL_GMAC5_SGMII;
-
+ if (!priv->p5_sgmii) {
+ mt7531_pll_setup(priv);
+ } else {
/* Let ds->user_mii_bus be able to access external phy. */
mt7530_rmw(priv, MT7531_GPIO_MODE1, MT7531_GPIO11_RG_RXD2_MASK,
MT7531_EXT_P_MDC_11);
mt7530_rmw(priv, MT7531_GPIO_MODE1, MT7531_GPIO12_RG_RXD3_MASK,
MT7531_EXT_P_MDIO_12);
- } else {
- priv->p5_intf_sel = P5_INTF_SEL_GMAC5;
}
- dev_dbg(ds->dev, "P5 support %s interface\n",
- p5_intf_modes(priv->p5_intf_sel));
+
+ if (!dsa_is_unused_port(ds, 5))
+ priv->p5_intf_sel = P5_INTF_SEL_GMAC5;

mt7530_rmw(priv, MT7531_GPIO_MODE0, MT7531_GPIO0_MASK,
MT7531_GPIO0_INTERRUPT);
@@ -2553,11 +2542,6 @@ static void mt7530_mac_port_get_caps(struct dsa_switch *ds, int port,
}
}

-static bool mt7531_is_rgmii_port(struct mt7530_priv *priv, u32 port)
-{
- return (port == 5) && (priv->p5_intf_sel != P5_INTF_SEL_GMAC5_SGMII);
-}
-
static void mt7531_mac_port_get_caps(struct dsa_switch *ds, int port,
struct phylink_config *config)
{
@@ -2570,7 +2554,7 @@ static void mt7531_mac_port_get_caps(struct dsa_switch *ds, int port,
break;

case 5: /* 2nd cpu port supports either rgmii or sgmii/8023z */
- if (mt7531_is_rgmii_port(priv, port)) {
+ if (!priv->p5_sgmii) {
phy_interface_set_rgmii(config->supported_interfaces);
break;
}
@@ -2637,7 +2621,7 @@ static int mt7531_rgmii_setup(struct mt7530_priv *priv, u32 port,
{
u32 val;

- if (!mt7531_is_rgmii_port(priv, port)) {
+ if (priv->p5_sgmii) {
dev_err(priv->dev, "RGMII mode is not available for port %d\n",
port);
return -EINVAL;
@@ -2881,7 +2865,7 @@ mt7531_cpu_port_config(struct dsa_switch *ds, int port)

switch (port) {
case 5:
- if (mt7531_is_rgmii_port(priv, port))
+ if (!priv->p5_sgmii)
interface = PHY_INTERFACE_MODE_RGMII;
else
interface = PHY_INTERFACE_MODE_2500BASEX;
@@ -3033,7 +3017,7 @@ mt753x_setup(struct dsa_switch *ds)
mt7530_free_irq_common(priv);

if (priv->create_sgmii) {
- ret = priv->create_sgmii(priv, mt7531_dual_sgmii_supported(priv));
+ ret = priv->create_sgmii(priv);
if (ret && priv->irq)
mt7530_free_irq(priv);
}
diff --git a/drivers/net/dsa/mt7530.h b/drivers/net/dsa/mt7530.h
index 9cbf18efa416..80060cc740d2 100644
--- a/drivers/net/dsa/mt7530.h
+++ b/drivers/net/dsa/mt7530.h
@@ -687,7 +687,6 @@ enum p5_interface_select {
P5_INTF_SEL_PHY_P0,
P5_INTF_SEL_PHY_P4,
P5_INTF_SEL_GMAC5,
- P5_INTF_SEL_GMAC5_SGMII,
};

struct mt7530_priv;
@@ -756,6 +755,8 @@ struct mt753x_info {
* registers
* @p6_interface Holding the current port 6 interface
* @p5_intf_sel: Holding the current port 5 interface select
+ * @p5_sgmii: Flag for distinguishing if port 5 of the MT7531 switch
+ * has got SGMII
* @irq: IRQ number of the switch
* @irq_domain: IRQ domain of the switch irq_chip
* @irq_enable: IRQ enable bits, synced to SYS_INT_EN
@@ -777,6 +778,7 @@ struct mt7530_priv {
phy_interface_t p6_interface;
phy_interface_t p5_interface;
enum p5_interface_select p5_intf_sel;
+ bool p5_sgmii;
u8 mirror_rx;
u8 mirror_tx;
struct mt7530_port ports[MT7530_NUM_PORTS];
@@ -786,7 +788,7 @@ struct mt7530_priv {
int irq;
struct irq_domain *irq_domain;
u32 irq_enable;
- int (*create_sgmii)(struct mt7530_priv *priv, bool dual_sgmii);
+ int (*create_sgmii)(struct mt7530_priv *priv);
u8 active_cpu_ports;
};

--
2.40.1