misc: Add IHS FPGA driver

Add a driver for gdsys IHS (Integrated Hardware Systems) FPGAs, which
supports initialization of the FPGA, as well as information gathering.

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

1 files changed, 49 insertions, 0 deletions

diff --git a/drivers/misc/ihs_fpga.h b/drivers/misc/ihs_fpga.h
new file mode 100644
index 00000000000..efb5dabb9c9
--- /dev/null
+++ b/drivers/misc/ihs_fpga.h
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * (C) Copyright 2018
+ * Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc
+ */
+
+/**
+ * struct ihs_fpga_regs - IHS FPGA register map structure
+ * @reflection_low:	  Lower reflection register
+ * @versions:		  PCB versions register
+ * @fpga_version:	  FPGA versions register
+ * @features:		  FPGA features register
+ * @extended_features:	  FPGA extended features register
+ * @top_interrupt:	  Top interrupt register
+ * @top_interrupt_enable: Top interrupt enable register
+ * @status:		  FPGA status register
+ * @control:		  FPGA control register
+ * @extended_control:	  FPGA extended control register
+ */
+struct ihs_fpga_regs {
+	u16 reflection_low;
+	u16 versions;
+	u16 fpga_version;
+	u16 features;
+	u16 extended_features;
+	u16 top_interrupt;
+	u16 top_interrupt_enable;
+	u16 status;
+	u16 control;
+	u16 extended_control;
+};
+
+/**
+ * ihs_fpga_set() - Convenience macro to set values in FPGA register map
+ * @map:    Register map to set a value in
+ * @member: Name of member (described by ihs_fpga_regs) to set
+ * @val:    Value to set the member to
+ */
+#define ihs_fpga_set(map, member, val) \
+	regmap_set(map, struct ihs_fpga_regs, member, val)
+
+/**
+ * ihs_fpga_get() - Convenience macro to get values from FPGA register map
+ * @map:    Register map to read value from
+ * @member: Name of member (described by ihs_fpga_regs) to get
+ * @valp:   Pointe to variable to receive the value read
+ */
+#define ihs_fpga_get(map, member, valp) \
+	regmap_get(map, struct ihs_fpga_regs, member, valp)