[PATCH RFCv1 1/3] fpga: add basic CARMA board support

[Ira W. Snyder]

This adds basic support for the system controller FPGA on the OVRO CARMA
board. This patch only adds infrastructure that will be used by later
drivers.

Signed-off-by: Ira W. Snyder <iws at ovro.caltech.edu>
---
 drivers/Kconfig             |    2 +
 drivers/Makefile            |    1 +
 drivers/fpga/Kconfig        |    1 +
 drivers/fpga/Makefile       |    1 +
 drivers/fpga/carma/Kconfig  |   21 ++++++++++++
 drivers/fpga/carma/Makefile |    1 +
 drivers/fpga/carma/carma.c  |   73 +++++++++++++++++++++++++++++++++++++++++++
 drivers/fpga/carma/carma.h  |   22 +++++++++++++
 8 files changed, 122 insertions(+), 0 deletions(-)
 create mode 100644 drivers/fpga/Kconfig
 create mode 100644 drivers/fpga/Makefile
 create mode 100644 drivers/fpga/carma/Kconfig
 create mode 100644 drivers/fpga/carma/Makefile
 create mode 100644 drivers/fpga/carma/carma.c
 create mode 100644 drivers/fpga/carma/carma.h

diff --git a/drivers/Kconfig b/drivers/Kconfig
index a2b902f..8945ae6 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -111,4 +111,6 @@ source "drivers/xen/Kconfig"
 source "drivers/staging/Kconfig"
 
 source "drivers/platform/Kconfig"
+
+source "drivers/fpga/Kconfig"
 endmenu
diff --git a/drivers/Makefile b/drivers/Makefile
index ae47344..c0b05de 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -115,3 +115,4 @@ obj-$(CONFIG_VLYNQ)		+= vlynq/
 obj-$(CONFIG_STAGING)		+= staging/
 obj-y				+= platform/
 obj-y				+= ieee802154/
+obj-$(CONFIG_FPGA_DRIVERS)	+= fpga/
diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig
new file mode 100644
index 0000000..c85c2cc
--- /dev/null
+++ b/drivers/fpga/Kconfig
@@ -0,0 +1 @@
+source "drivers/fpga/carma/Kconfig"
diff --git a/drivers/fpga/Makefile b/drivers/fpga/Makefile
new file mode 100644
index 0000000..409a5f9
--- /dev/null
+++ b/drivers/fpga/Makefile
@@ -0,0 +1 @@
+obj-y		+= carma/
diff --git a/drivers/fpga/carma/Kconfig b/drivers/fpga/carma/Kconfig
new file mode 100644
index 0000000..448885e
--- /dev/null
+++ b/drivers/fpga/carma/Kconfig
@@ -0,0 +1,21 @@
+
+menuconfig FPGA_DRIVERS
+	bool "FPGA Drivers"
+	default n
+	help
+	  Say Y here to see options for devices used with custom FPGAs.
+	  This option alone does not add any kernel code.
+
+	  If you say N, all options in this submenu will be skipped and disabled.
+
+if FPGA_DRIVERS
+
+config CARMA
+	tristate "CARMA System Controller FPGA support"
+	depends on FSL_SOC && PPC_83xx
+	default n
+	help
+	  Say Y here to include basic support for the CARMA System Controller
+	  FPGA. This option allows the other more advanced drivers to be built.
+
+endif # FPGA_DRIVERS
diff --git a/drivers/fpga/carma/Makefile b/drivers/fpga/carma/Makefile
new file mode 100644
index 0000000..90d0594
--- /dev/null
+++ b/drivers/fpga/carma/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_CARMA)			+= carma.o
diff --git a/drivers/fpga/carma/carma.c b/drivers/fpga/carma/carma.c
new file mode 100644
index 0000000..97549d2
--- /dev/null
+++ b/drivers/fpga/carma/carma.c
@@ -0,0 +1,73 @@
+/*
+ * CARMA Board Utility Driver
+ *
+ * Copyright (c) 2009-2010 Ira W. Snyder <iws at ovro.caltech.edu>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/err.h>
+
+#include "carma.h"
+
+static struct class *carma_class;
+static const char drv_name[] = "carma";
+
+/*
+ * CARMA Device Class Functions
+ */
+
+struct device *carma_device_create(struct device *parent, dev_t devno,
+				   const char *fmt, ...)
+{
+	struct device *dev;
+	va_list vargs;
+
+	va_start(vargs, fmt);
+	dev = device_create_vargs(carma_class, parent, devno, NULL, fmt, vargs);
+	va_end(vargs);
+
+	return dev;
+}
+EXPORT_SYMBOL_GPL(carma_device_create);
+
+void carma_device_destroy(dev_t devno)
+{
+	device_destroy(carma_class, devno);
+}
+EXPORT_SYMBOL_GPL(carma_device_destroy);
+
+/*
+ * Module Init / Exit
+ */
+
+static int __init carma_init(void)
+{
+	/* Register the CARMA device class */
+	carma_class = class_create(THIS_MODULE, "carma");
+	if (IS_ERR(carma_class)) {
+		pr_err("%s: unable to create CARMA class\n", drv_name);
+		return PTR_ERR(carma_class);
+	}
+
+	return 0;
+}
+
+static void __exit carma_exit(void)
+{
+	class_destroy(carma_class);
+}
+
+MODULE_AUTHOR("Ira W. Snyder <iws at ovro.caltech.edu>");
+MODULE_DESCRIPTION("CARMA Device Class Driver");
+MODULE_LICENSE("GPL");
+
+module_init(carma_init);
+module_exit(carma_exit);
diff --git a/drivers/fpga/carma/carma.h b/drivers/fpga/carma/carma.h
new file mode 100644
index 0000000..f556dc8
--- /dev/null
+++ b/drivers/fpga/carma/carma.h
@@ -0,0 +1,22 @@
+/*
+ * CARMA Board Utilities
+ *
+ * Copyright (c) 2009-2010 Ira W. Snyder <iws at ovro.caltech.edu>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#ifndef CARMA_DEVICE_H
+#define CARMA_DEVICE_H
+
+#include <linux/device.h>
+
+struct device *carma_device_create(struct device *parent, dev_t devno,
+				   const char *fmt, ...)
+				   __attribute__((format(printf, 3, 4)));
+void carma_device_destroy(dev_t devno);
+
+#endif /* CARMA_DEVICE_H */
-- 
1.7.1