phy: marvell: cp110: add support for end point configuration

The serdes was always configured in root complex mode.
this patch add new entry in device tree (per serdes)
which indicates whether the serdes is in end point mode.
if so, it skips the root complex configuration.

Signed-off-by: Haim Boot <hayim@marvell.com>
Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Igal Liberman <igall@marvell.com>
Reviewed-by: Stefan Roese <sr@denx.de>

drivers/phy/marvell/comphy.h

@@ -86,6 +86,7 @@ struct comphy_map {
 	u32 speed;
 	u32 invert;
 	bool clk_src;
+	bool end_point;
 };
 
 struct chip_serdes_phy_config {

drivers/phy/marvell/comphy_core.c

@@ -167,6 +167,8 @@ static int comphy_probe(struct udevice *dev)
 			blob, subnode, "phy-invert", PHY_POLARITY_NO_INVERT);
 		comphy_map_data[lane].clk_src = fdtdec_get_bool(blob, subnode,
 								"clk-src");
+		comphy_map_data[lane].end_point = fdtdec_get_bool(blob, subnode,
+								  "end_point");
 		if (comphy_map_data[lane].type == PHY_TYPE_INVALID) {
 			printf("no phy type for lane %d, setting lane as unconnected\n",
 			       lane + 1);

drivers/phy/marvell/comphy_cp110.c

@@ -87,8 +87,8 @@ static u32 polling_with_timeout(void __iomem *addr, u32 val,
 	return 0;
 }
 
-static int comphy_pcie_power_up(u32 lane, u32 pcie_width,
-				bool clk_src, void __iomem *hpipe_base,
+static int comphy_pcie_power_up(u32 lane, u32 pcie_width, bool clk_src,
+				bool is_end_point, void __iomem *hpipe_base,
 				void __iomem *comphy_base)
 {
 	u32 mask, data, ret = 1;
@@ -109,6 +109,7 @@ static int comphy_pcie_power_up(u32 lane, u32 pcie_width,
 	 * and SerDes Lane 0 got PCIe ref-clock #0
 	 */
 	debug("PCIe clock = %x\n", pcie_clk);
+	debug("PCIe RC    = %d\n", !is_end_point);
 	debug("PCIe width = %d\n", pcie_width);
 
 	/* enable PCIe by4 and by2 */
@@ -384,10 +385,12 @@ static int comphy_pcie_power_up(u32 lane, u32 pcie_width,
 	data |= 0x1 << HPIPE_G3_FFE_LOAD_RES_LEVEL_OFFSET;
 	reg_set(hpipe_addr + HPIPE_G3_SETTING_3_REG, data, mask);
 
-	/* Set phy in root complex mode */
-	mask = HPIPE_CFG_PHY_RC_EP_MASK;
-	data = 0x1 << HPIPE_CFG_PHY_RC_EP_OFFSET;
-	reg_set(hpipe_addr + HPIPE_LANE_EQU_CONFIG_0_REG, data, mask);
+	if (!is_end_point) {
+		/* Set phy in root complex mode */
+		mask = HPIPE_CFG_PHY_RC_EP_MASK;
+		data = 0x1 << HPIPE_CFG_PHY_RC_EP_OFFSET;
+		reg_set(hpipe_addr + HPIPE_LANE_EQU_CONFIG_0_REG, data, mask);
+	}
 
 	debug("stage: Comphy power up\n");
 
@@ -1667,6 +1670,7 @@ int comphy_cp110_init(struct chip_serdes_phy_config *ptr_chip_cfg,
 		case PHY_TYPE_PEX3:
 			ret = comphy_pcie_power_up(
 				lane, pcie_width, ptr_comphy_map->clk_src,
+				serdes_map->end_point,
 				hpipe_base_addr, comphy_base_addr);
 			break;
 		case PHY_TYPE_SATA0: