drivers/phy: Add Marvell SerDes / PHY drivers used on Armada 3k

This version is based on the Marvell U-Boot version with this patch
applied as latest patch:

Git ID 7f408573: "fix: comphy: cp110: add comphy initialization for usb
device mode" from 2016-07-05.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Nadav Haklai <nadavh@marvell.com>
Cc: Kostya Porotchkin <kostap@marvell.com>
Cc: Wilson Ding <dingwei@marvell.com>
Cc: Victor Gu <xigu@marvell.com>
Cc: Hua Jing <jinghua@marvell.com>
Cc: Terry Zhou <bjzhou@marvell.com>
Cc: Hanna Hawa <hannah@marvell.com>
Cc: Haim Boot <hayim@marvell.com>

1 files changed, 118 insertions, 0 deletions

diff --git a/drivers/phy/marvell/comphy_mux.c b/drivers/phy/marvell/comphy_mux.c
new file mode 100644
index 0000000000..1dc7426b63
--- /dev/null
+++ b/drivers/phy/marvell/comphy_mux.c
@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) 2015-2016 Marvell International Ltd.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+
+#include "comphy.h"
+#include "comphy_hpipe.h"
+
+/*
+ * comphy_mux_check_config()
+ * description: this function passes over the COMPHY lanes and check if the type
+ *              is valid for specific lane. If the type is not valid,
+ *              the function update the struct and set the type of the lane as
+ *              PHY_TYPE_UNCONNECTED
+ */
+static void comphy_mux_check_config(struct comphy_mux_data *mux_data,
+		struct comphy_map *comphy_map_data, int comphy_max_lanes)
+{
+	struct comphy_mux_options *mux_opt;
+	int lane, opt, valid;
+
+	debug_enter();
+
+	for (lane = 0; lane < comphy_max_lanes;
+	     lane++, comphy_map_data++, mux_data++) {
+		mux_opt = mux_data->mux_values;
+		for (opt = 0, valid = 0; opt < mux_data->max_lane_values;
+		     opt++, mux_opt++) {
+			if (mux_opt->type == comphy_map_data->type) {
+				valid = 1;
+				break;
+			}
+		}
+		if (valid == 0) {
+			debug("lane number %d, had invalid type %d\n",
+			      lane, comphy_map_data->type);
+			debug("set lane %d as type %d\n", lane,
+			      PHY_TYPE_UNCONNECTED);
+			comphy_map_data->type = PHY_TYPE_UNCONNECTED;
+		} else {
+			debug("lane number %d, has type %d\n",
+			      lane, comphy_map_data->type);
+		}
+	}
+
+	debug_exit();
+}
+
+static u32 comphy_mux_get_mux_value(struct comphy_mux_data *mux_data,
+				    u32 type, int lane)
+{
+	struct comphy_mux_options *mux_opt;
+	int opt;
+	u32 value = 0;
+
+	debug_enter();
+
+	mux_opt = mux_data->mux_values;
+	for (opt = 0 ; opt < mux_data->max_lane_values; opt++, mux_opt++) {
+		if (mux_opt->type == type) {
+			value = mux_opt->mux_value;
+			break;
+		}
+	}
+
+	debug_exit();
+
+	return value;
+}
+
+static void comphy_mux_reg_write(struct comphy_mux_data *mux_data,
+				 struct comphy_map *comphy_map_data,
+				 int comphy_max_lanes,
+				 void __iomem *selector_base, u32 bitcount)
+{
+	u32 lane, value, offset, mask;
+
+	debug_enter();
+
+	for (lane = 0; lane < comphy_max_lanes;
+	     lane++, comphy_map_data++, mux_data++) {
+		offset = lane * bitcount;
+		mask = (((1 << bitcount) - 1) << offset);
+		value = (comphy_mux_get_mux_value(mux_data,
+						  comphy_map_data->type,
+						  lane) << offset);
+		reg_set(selector_base, value, mask);
+	}
+
+	debug_exit();
+}
+
+void comphy_mux_init(struct chip_serdes_phy_config *chip_cfg,
+		     struct comphy_map *comphy_map_data,
+		     void __iomem *selector_base)
+{
+	struct comphy_mux_data *mux_data;
+	u32 mux_bitcount;
+	u32 comphy_max_lanes;
+
+	debug_enter();
+
+	comphy_max_lanes = chip_cfg->comphy_lanes_count;
+	mux_data = chip_cfg->mux_data;
+	mux_bitcount = chip_cfg->comphy_mux_bitcount;
+
+	/* check if the configuration is valid */
+	comphy_mux_check_config(mux_data, comphy_map_data, comphy_max_lanes);
+	/* Init COMPHY selectors */
+	comphy_mux_reg_write(mux_data, comphy_map_data, comphy_max_lanes,
+			     selector_base, mux_bitcount);
+
+	debug_exit();
+}