[PATCH 1/9] net: tsec: add support for promiscuous mode

[Vladimir Oltean <vladimir.oltean@nxp.com>]

The Freescale TSEC can be a DSA master, and the ports of the attached
DSA switch can have different MAC addresses compared to the TSEC.
Nonetheless, the TSEC must receive the packets on behalf of those switch
ports. Therefore, implement the promiscuous mode method to allow DSA to
set this.

Note that the init_registers() function called from eth_ops :: start
overwrites this setting. There is no reason why the RCTRL register
should be zero-initialized, so just stop clearing it so that the setting
we applied in eth_ops :: set_promisc sticks.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
 drivers/net/tsec.c | 20 ++++++++++++++++----
 include/tsec.h     |  2 ++
 2 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/drivers/net/tsec.c b/drivers/net/tsec.c
index f0cf0a7559ab..6f9abdae9269 100644
--- a/drivers/net/tsec.c
+++ b/drivers/net/tsec.c
@@ -156,6 +156,19 @@ static int tsec_mcast_addr(struct udevice *dev, const u8 *mcast_mac, int join)
 	return 0;
 }
 
+static int tsec_set_promisc(struct udevice *dev, bool enable)
+{
+	struct tsec_private *priv = dev_get_priv(dev);
+	struct tsec __iomem *regs = priv->regs;
+
+	if (enable)
+		setbits_be32(&regs->rctrl, RCTRL_PROM);
+	else
+		clrbits_be32(&regs->rctrl, RCTRL_PROM);
+
+	return 0;
+}
+
 /*
  * Initialized required registers to appropriate values, zeroing
  * those we don't care about (unless zero is bad, in which case,
@@ -186,8 +199,6 @@ static void init_registers(struct tsec __iomem *regs)
 	out_be32(&regs->hash.gaddr6, 0);
 	out_be32(&regs->hash.gaddr7, 0);
 
-	out_be32(&regs->rctrl, 0x00000000);
-
 	/* Init RMON mib registers */
 	memset((void *)&regs->rmon, 0, sizeof(regs->rmon));
 
@@ -454,7 +465,7 @@ void redundant_init(struct tsec_private *priv)
 		0x71, 0x72};
 
 	/* Enable promiscuous mode */
-	setbits_be32(&regs->rctrl, 0x8);
+	setbits_be32(&regs->rctrl, RCTRL_PROM);
 	/* Enable loopback mode */
 	setbits_be32(&regs->maccfg1, MACCFG1_LOOPBACK);
 	/* Enable transmit and receive */
@@ -506,7 +517,7 @@ void redundant_init(struct tsec_private *priv)
 	if (fail)
 		panic("eTSEC init fail!\n");
 	/* Disable promiscuous mode */
-	clrbits_be32(&regs->rctrl, 0x8);
+	clrbits_be32(&regs->rctrl, RCTRL_PROM);
 	/* Disable loopback mode */
 	clrbits_be32(&regs->maccfg1, MACCFG1_LOOPBACK);
 }
@@ -932,6 +943,7 @@ static const struct eth_ops tsec_ops = {
 	.free_pkt = tsec_free_pkt,
 	.stop = tsec_halt,
 	.mcast = tsec_mcast_addr,
+	.set_promisc = tsec_set_promisc,
 };
 
 static struct tsec_data etsec2_data = {
diff --git a/include/tsec.h b/include/tsec.h
index 5433cfd96610..044ee35a91bd 100644
--- a/include/tsec.h
+++ b/include/tsec.h
@@ -122,6 +122,8 @@
 #define ECNTRL_REDUCED_MII_MODE	0x00000004
 #define ECNTRL_SGMII_MODE	0x00000002
 
+#define RCTRL_PROM		0x00000008
+
 #ifndef CONFIG_SYS_TBIPA_VALUE
 # define CONFIG_SYS_TBIPA_VALUE	0x1f
 #endif
-- 
2.25.1