openwrt/package/kernel/qca-ssdk/patches/102-qca-ssdk-support-selecting-PCS-channel-for-PORT3-on-.patch

From 0116bb7359bd99c09bcad1b2051652cd1a04be3f Mon Sep 17 00:00:00 2001
From: Mantas Pucka <mantas@8devices.com>
Date: Mon, 12 Feb 2024 14:23:04 +0200
Subject: [PATCH] qca-ssdk: support selecting PCS channel for PORT3 on IPQ6018

When QCA8072 is used in PSGMII mode with IPQ6018, PCS used for second
PHY port would overlap with one used by SGMII+ port. SoC has register
to select different PCS in such case.

Original code used PHY_ID for this decision, which also had other
issues, but is no longer viable since we moved to upstream QCA807x
driver.

Introduce DT property port3_pcs_channel to allow describing this in DT.
Default value is <2>, and for some QCA8072 designs <4> would be needed.

Signed-off-by: Mantas Pucka <mantas@8devices.com>
---
 include/init/ssdk_dts.h            |  2 ++
 src/adpt/cppe/adpt_cppe_portctrl.c |  4 ++--
 src/adpt/hppe/adpt_hppe_uniphy.c   |  7 +------
 src/init/ssdk_dts.c                | 27 +++++++++++++++++++++++++++
 4 files changed, 32 insertions(+), 8 deletions(-)

--- a/include/init/ssdk_dts.h
+++ b/include/init/ssdk_dts.h
@@ -99,6 +99,7 @@ typedef struct
 	a_uint32_t emu_chip_ver; /*only valid when is_emulation is true*/
 	a_uint32_t clk_mode;
 	a_uint32_t pcie_hw_base;
+	a_uint32_t port3_pcs_channel;
 	led_ctrl_pattern_t source_pattern[SSDK_MAX_PORT_NUM][PORT_LED_SOURCE_MAX];
 } ssdk_dt_cfg;
 
@@ -161,6 +162,7 @@ a_uint32_t ssdk_device_id_get(a_uint32_t
 struct device_node *ssdk_dts_node_get(a_uint32_t dev_id);
 struct clk *ssdk_dts_essclk_get(a_uint32_t dev_id);
 struct clk *ssdk_dts_cmnclk_get(a_uint32_t dev_id);
+a_uint32_t ssdk_dts_port3_pcs_channel_get(a_uint32_t dev_id);
 
 int ssdk_switch_device_num_init(void);
 void ssdk_switch_device_num_exit(void);
--- a/src/adpt/cppe/adpt_cppe_portctrl.c
+++ b/src/adpt/cppe/adpt_cppe_portctrl.c
@@ -33,6 +33,7 @@
 #include "hsl_phy.h"
 #include "hsl_port_prop.h"
 #include "hppe_init.h"
+#include "ssdk_dts.h"
 #include "adpt.h"
 #include "adpt_hppe.h"
 #include "adpt_cppe_portctrl.h"
@@ -60,8 +61,7 @@ _adpt_cppe_port_mux_mac_set(a_uint32_t d
 		case SSDK_PHYSICAL_PORT3:
 		case SSDK_PHYSICAL_PORT4:
 			if (mode0 == PORT_WRAPPER_PSGMII) {
-				if (hsl_port_phyid_get(dev_id,
-					SSDK_PHYSICAL_PORT3) == MALIBU2PORT_PHY) {
+				if (ssdk_dts_port3_pcs_channel_get(dev_id) == 4) {
 					cppe_port_mux_ctrl.bf.port3_pcs_sel =
 						CPPE_PORT3_PCS_SEL_PCS0_CHANNEL4;
 					cppe_port_mux_ctrl.bf.port4_pcs_sel =
--- a/src/adpt/hppe/adpt_hppe_uniphy.c
+++ b/src/adpt/hppe/adpt_hppe_uniphy.c
@@ -1160,9 +1160,6 @@ __adpt_hppe_uniphy_psgmii_mode_set(a_uin
 {
 	a_uint32_t i;
 	sw_error_t rv = SW_OK;
-#if defined(CPPE)
-	a_uint32_t phy_type = 0;
-#endif
 
 	union uniphy_mode_ctrl_u uniphy_mode_ctrl;
 
@@ -1172,9 +1169,7 @@ __adpt_hppe_uniphy_psgmii_mode_set(a_uin
 	SSDK_DEBUG("uniphy %d is psgmii mode\n", uniphy_index);
 #if defined(CPPE)
 	if (adpt_ppe_type_get(dev_id) == CPPE_TYPE) {
-		phy_type = hsl_port_phyid_get(dev_id,
-				SSDK_PHYSICAL_PORT3);
-		if (phy_type == MALIBU2PORT_PHY) {
+		if (ssdk_dts_port3_pcs_channel_get(dev_id) == 4) {
 			SSDK_INFO("cypress uniphy %d is qca8072 psgmii mode\n", uniphy_index);
 			rv = __adpt_cppe_uniphy_mode_set(dev_id, uniphy_index,
 				PORT_WRAPPER_PSGMII);
--- a/src/init/ssdk_dts.c
+++ b/src/init/ssdk_dts.c
@@ -272,6 +272,13 @@ struct clk *ssdk_dts_cmnclk_get(a_uint32
 	return cfg->cmnblk_clk;
 }
 
+a_uint32_t ssdk_dts_port3_pcs_channel_get(a_uint32_t dev_id)
+{
+	ssdk_dt_cfg* cfg = ssdk_dt_global.ssdk_dt_switch_nodes[dev_id];
+
+	return cfg->port3_pcs_channel;
+}
+
 #if defined(CONFIG_OF) && (LINUX_VERSION_CODE >= KERNEL_VERSION(3,14,0))
 static void ssdk_dt_parse_mac_mode(a_uint32_t dev_id,
 		struct device_node *switch_node, ssdk_init_cfg *cfg)
@@ -305,6 +312,25 @@ static void ssdk_dt_parse_mac_mode(a_uin
 
 	return;
 }
+
+static void ssdk_dt_parse_port3_pcs_channel(a_uint32_t dev_id,
+		struct device_node *switch_node, ssdk_init_cfg *cfg)
+{
+	const __be32 *port3_pcs_channel;
+	a_uint32_t len = 0;
+
+	port3_pcs_channel = of_get_property(switch_node, "port3_pcs_channel", &len);
+	if (!port3_pcs_channel) {
+		ssdk_dt_global.ssdk_dt_switch_nodes[dev_id]->port3_pcs_channel = 2;
+	}
+	else {
+		ssdk_dt_global.ssdk_dt_switch_nodes[dev_id]->port3_pcs_channel =
+			be32_to_cpup(port3_pcs_channel);
+	}
+
+	return;
+}
+
 #ifdef IN_UNIPHY
 static void ssdk_dt_parse_uniphy(a_uint32_t dev_id)
 {
@@ -1354,6 +1380,7 @@ sw_error_t ssdk_dt_parse(ssdk_init_cfg *
 	rv = ssdk_dt_parse_access_mode(switch_node, ssdk_dt_priv);
 	SW_RTN_ON_ERROR(rv);
 	ssdk_dt_parse_mac_mode(*dev_id, switch_node, cfg);
+	ssdk_dt_parse_port3_pcs_channel(*dev_id, switch_node, cfg);
 	ssdk_dt_parse_mdio(*dev_id, switch_node, cfg);
 	ssdk_dt_parse_port_bmp(*dev_id, switch_node, cfg);
 	ssdk_dt_parse_interrupt(*dev_id, switch_node);