net: dsa: sja1105: make sure the retagging port is enabled for SJA1110

The SJA1110 has an extra configuration in the General Parameters Table
through which the user can select the buffer reservation config.

Signed-off-by: Vladimir Oltean <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: vladimiroltean

drivers/net/dsa/sja1105/sja1105_main.c

@@ -565,6 +565,60 @@ void sja1105_frame_memory_partitioning(struct sja1105_private *priv)
 	vl_fwd_params->partspc[0] = SJA1105_VL_FRAME_MEMORY;
 }
 
+/* SJA1110 TDMACONFIGIDX values:
+ *
+ *      | 100 Mbps ports |  1Gbps ports  | 2.5Gbps ports | Disabled ports
+ * -----+----------------+---------------+---------------+---------------
+ *   0  |   0, [5:10]    |     [1:2]     |     [3:4]     |     retag
+ *   1  |0, [5:10], retag|     [1:2]     |     [3:4]     |       -
+ *   2  |   0, [5:10]    |  [1:3], retag |       4       |       -
+ *   3  |   0, [5:10]    |[1:2], 4, retag|       3       |       -
+ *   4  |  0, 2, [5:10]  |    1, retag   |     [3:4]     |       -
+ *   5  |  0, 1, [5:10]  |    2, retag   |     [3:4]     |       -
+ *  14  |   0, [5:10]    | [1:4], retag  |       -       |       -
+ *  15  |     [5:10]     | [0:4], retag  |       -       |       -
+ */
+static void sja1110_select_tdmaconfigidx(struct sja1105_private *priv)
+{
+	struct sja1105_general_params_entry *general_params;
+	struct sja1105_table *table;
+	bool port_1_is_base_tx;
+	bool port_3_is_2500;
+	bool port_4_is_2500;
+	u64 tdmaconfigidx;
+
+	if (priv->info->device_id != SJA1110_DEVICE_ID)
+		return;
+
+	table = &priv->static_config.tables[BLK_IDX_GENERAL_PARAMS];
+	general_params = table->entries;
+
+	/* All the settings below are "as opposed to SGMII", which is the
+	 * other pinmuxing option.
+	 */
+	port_1_is_base_tx = priv->phy_mode[1] == PHY_INTERFACE_MODE_INTERNAL;
+	port_3_is_2500 = priv->phy_mode[3] == PHY_INTERFACE_MODE_2500BASEX;
+	port_4_is_2500 = priv->phy_mode[4] == PHY_INTERFACE_MODE_2500BASEX;
+
+	if (port_1_is_base_tx)
+		/* Retagging port will operate at 1 Gbps */
+		tdmaconfigidx = 5;
+	else if (port_3_is_2500 && port_4_is_2500)
+		/* Retagging port will operate at 100 Mbps */
+		tdmaconfigidx = 1;
+	else if (port_3_is_2500)
+		/* Retagging port will operate at 1 Gbps */
+		tdmaconfigidx = 3;
+	else if (port_4_is_2500)
+		/* Retagging port will operate at 1 Gbps */
+		tdmaconfigidx = 2;
+	else
+		/* Retagging port will operate at 1 Gbps */
+		tdmaconfigidx = 14;
+
+	general_params->tdmaconfigidx = tdmaconfigidx;
+}
+
 static int sja1105_init_general_params(struct sja1105_private *priv)
 {
 	struct sja1105_general_params_entry default_general_params = {
@@ -640,6 +694,8 @@ static int sja1105_init_general_params(struct sja1105_private *priv)
 	((struct sja1105_general_params_entry *)table->entries)[0] =
 				default_general_params;
 
+	sja1110_select_tdmaconfigidx(priv);
+
 	return 0;
 }
 

drivers/net/dsa/sja1105/sja1105_static_config.c

@@ -211,6 +211,7 @@ size_t sja1110_general_params_entry_packing(void *buf, void *entry_ptr,
 	sja1105_packing(buf, &entry->egrmirrpcp,   113, 111, size, op);
 	sja1105_packing(buf, &entry->egrmirrdei,   110, 110, size, op);
 	sja1105_packing(buf, &entry->replay_port,  109, 106, size, op);
+	sja1105_packing(buf, &entry->tdmaconfigidx, 70,  67, size, op);
 	sja1105_packing(buf, &entry->tte_en,        16,  16, size, op);
 	return size;
 }

drivers/net/dsa/sja1105/sja1105_static_config.h

@@ -216,6 +216,7 @@ struct sja1105_general_params_entry {
 	u64 replay_port;
 	/* SJA1110 only */
 	u64 tte_en;
+	u64 tdmaconfigidx;
 };
 
 struct sja1105_schedule_entry_points_entry {