gdsys: drivers: Add gdsys_rxaui_ctrl driver

Add a driver for RXAUI control on IHS FPGAs.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
Reviewed-by: Simon Glass <sjg@chromium.org>

drivers/misc/Kconfig

@@ -263,5 +263,9 @@ config SYS_I2C_EEPROM_ADDR_OVERFLOW
 
 endif
 
-
+config GDSYS_RXAUI_CTRL
+	bool "Enable gdsys RXAUI control driver"
+	depends on MISC
+	help
+	  Support gdsys FPGA's RXAUI control.
 endmenu

drivers/misc/Makefile

@@ -52,3 +52,4 @@ obj-$(CONFIG_QFW) += qfw.o
 obj-$(CONFIG_ROCKCHIP_EFUSE) += rockchip-efuse.o
 obj-$(CONFIG_STM32_RCC) += stm32_rcc.o
 obj-$(CONFIG_SYS_DPAA_QBMAN) += fsl_portals.o
+obj-$(CONFIG_GDSYS_RXAUI_CTRL) += gdsys_rxaui_ctrl.o

drivers/misc/gdsys_rxaui_ctrl.c

@@ -0,0 +1,76 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2015
+ * Dirk Eibach,  Guntermann & Drunck GmbH, eibach@gdsys.de
+ *
+ * (C) Copyright 2017
+ * Mario Six,  Guntermann & Drunck GmbH, mario.six@gdsys.cc
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <regmap.h>
+#include <misc.h>
+
+struct gdsys_rxaui_ctrl_regs {
+	u16 gen_cnt;
+	u16 err_cnt;
+	u16 succ_cnt;
+	u16 status;
+	u16 ctrl_0;
+	u16 ctrl_1;
+};
+
+#define rxaui_ctrl_set(map, member, val) \
+	regmap_set(map, struct gdsys_rxaui_ctrl_regs, member, val)
+
+#define rxaui_ctrl_get(map, member, valp) \
+	regmap_get(map, struct gdsys_rxaui_ctrl_regs, member, valp)
+
+struct gdsys_rxaui_ctrl_priv {
+	struct regmap *map;
+};
+
+int gdsys_rxaui_set_polarity_inversion(struct udevice *dev, bool val)
+{
+	struct gdsys_rxaui_ctrl_priv *priv = dev_get_priv(dev);
+	u16 state;
+
+	rxaui_ctrl_get(priv->map, ctrl_1, &state);
+
+	if (val)
+		state |= ~0x7800;
+	else
+		state &= ~0x7800;
+
+	rxaui_ctrl_set(priv->map, ctrl_1, state);
+
+	return 0;
+}
+
+static const struct misc_ops gdsys_rxaui_ctrl_ops = {
+	.set_enabled = gdsys_rxaui_set_polarity_inversion,
+};
+
+int gdsys_rxaui_ctrl_probe(struct udevice *dev)
+{
+	struct gdsys_rxaui_ctrl_priv *priv = dev_get_priv(dev);
+
+	regmap_init_mem(dev, &priv->map);
+
+	return 0;
+}
+
+static const struct udevice_id gdsys_rxaui_ctrl_ids[] = {
+	{ .compatible = "gdsys,rxaui_ctrl" },
+	{ }
+};
+
+U_BOOT_DRIVER(gdsys_rxaui_ctrl) = {
+	.name           = "gdsys_rxaui_ctrl",
+	.id             = UCLASS_MISC,
+	.ops		= &gdsys_rxaui_ctrl_ops,
+	.of_match       = gdsys_rxaui_ctrl_ids,
+	.probe          = gdsys_rxaui_ctrl_probe,
+	.priv_auto_alloc_size = sizeof(struct gdsys_rxaui_ctrl_priv),
+};