netdev - [PATCH net-next v6 09/13] net: dsa: realtek: rtl8365mb: use DSA CPU port

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Date:   Fri, 28 Jan 2022 03:05:05 -0300
From:   Luiz Angelo Daros de Luca <luizluca@...il.com>
To:     netdev@...r.kernel.org
Cc:     linus.walleij@...aro.org, andrew@...n.ch, vivien.didelot@...il.com,
        f.fainelli@...il.com, olteanv@...il.com, alsi@...g-olufsen.dk,
        arinc.unal@...nc9.com, frank-w@...lic-files.de,
        davem@...emloft.net, kuba@...nel.org,
        Luiz Angelo Daros de Luca <luizluca@...il.com>
Subject: [PATCH net-next v6 09/13] net: dsa: realtek: rtl8365mb: use DSA CPU port

Instead of a fixed CPU port, assume that DSA is correct.

Signed-off-by: Luiz Angelo Daros de Luca <luizluca@...il.com>
Tested-by: Arınç ÜNAL <arinc.unal@...nc9.com>
Reviewed-by: Alvin Šipraga <alsi@...g-olufsen.dk>
Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
---
 drivers/net/dsa/realtek/rtl8365mb.c | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/drivers/net/dsa/realtek/rtl8365mb.c b/drivers/net/dsa/realtek/rtl8365mb.c
index c2e6ec257a28..d580afc04b8d 100644
--- a/drivers/net/dsa/realtek/rtl8365mb.c
+++ b/drivers/net/dsa/realtek/rtl8365mb.c
@@ -103,7 +103,6 @@
 
 /* Chip-specific data and limits */
 #define RTL8365MB_CHIP_ID_8365MB_VC		0x6367
-#define RTL8365MB_CPU_PORT_NUM_8365MB_VC	6
 #define RTL8365MB_LEARN_LIMIT_MAX_8365MB_VC	2112
 static const int rtl8365mb_extint_port_map[] = { -1, -1, -1, -1, -1, -1, 1 };
 
@@ -111,7 +110,7 @@ static const int rtl8365mb_extint_port_map[] = { -1, -1, -1, -1, -1, -1, 1 };
 #define RTL8365MB_PHYADDRMAX	7
 #define RTL8365MB_NUM_PHYREGS	32
 #define RTL8365MB_PHYREGMAX	(RTL8365MB_NUM_PHYREGS - 1)
-#define RTL8365MB_MAX_NUM_PORTS	(RTL8365MB_CPU_PORT_NUM_8365MB_VC + 1)
+#define RTL8365MB_MAX_NUM_PORTS  7
 
 /* Chip identification registers */
 #define RTL8365MB_CHIP_ID_REG		0x1300
@@ -1821,6 +1820,7 @@ static int rtl8365mb_reset_chip(struct realtek_priv *priv)
 static int rtl8365mb_setup(struct dsa_switch *ds)
 {
 	struct realtek_priv *priv = ds->priv;
+	struct dsa_port *cpu_dp;
 	struct rtl8365mb *mb;
 	int ret;
 	int i;
@@ -1848,9 +1848,17 @@ static int rtl8365mb_setup(struct dsa_switch *ds)
 		dev_info(priv->dev, "no interrupt support\n");
 
 	/* Configure CPU tagging */
-	ret = rtl8365mb_cpu_config(priv);
-	if (ret)
-		goto out_teardown_irq;
+	/* Currently, only one CPU port is supported */
+	dsa_switch_for_each_cpu_port(cpu_dp, priv->ds) {
+		priv->cpu_port = cpu_dp->index;
+		mb->cpu.mask = BIT(priv->cpu_port);
+		mb->cpu.trap_port = priv->cpu_port;
+		ret = rtl8365mb_cpu_config(priv);
+		if (ret)
+			goto out_teardown_irq;
+
+		break;
+	}
 
 	/* Configure ports */
 	for (i = 0; i < priv->num_ports; i++) {
@@ -1962,8 +1970,7 @@ static int rtl8365mb_detect(struct realtek_priv *priv)
 			 "found an RTL8365MB-VC switch (ver=0x%04x)\n",
 			 chip_ver);
 
-		priv->cpu_port = RTL8365MB_CPU_PORT_NUM_8365MB_VC;
-		priv->num_ports = priv->cpu_port + 1;
+		priv->num_ports = RTL8365MB_MAX_NUM_PORTS;
 
 		mb->priv = priv;
 		mb->chip_id = chip_id;
@@ -1974,8 +1981,6 @@ static int rtl8365mb_detect(struct realtek_priv *priv)
 		mb->jam_size = ARRAY_SIZE(rtl8365mb_init_jam_8365mb_vc);
 
 		mb->cpu.enable = 1;
-		mb->cpu.mask = BIT(priv->cpu_port);
-		mb->cpu.trap_port = priv->cpu_port;
 		mb->cpu.insert = RTL8365MB_CPU_INSERT_TO_ALL;
 		mb->cpu.position = RTL8365MB_CPU_POS_AFTER_SA;
 		mb->cpu.rx_length = RTL8365MB_CPU_RXLEN_64BYTES;
-- 
2.34.1