staging: comedi: amplc_dio200: split into ISA, PCI and common

Split the "amplc_dio200" comedi driver module into separate driver
modules for ISA and PCI boards with a common module for the shared code.

Keep the old name "amplc_dio200" for the ISA board driver as the module
may be modprobed with this name by a script.  (If the script uses insmod
it will need modifying to load the "amplc_dio200_common" module first.)

Use the module name "amplc_dio200_pci" for the PCI board driver.  On
most systems this will be auto-loaded.

Use the module name "amplc_dio200_common" for the module containing the
shared code.  This is normally loaded as a dependency of the other two
modules.

"amplc_dio200_common" exports the following functions:

* `amplc_dio200_common_attach()`: this is basically the old
  `dio200_common_attach()` from the combined driver module.  It is
  called from the driver-specific attach or auto-attach routines.
* `amplc_dio200_common_detach()`: this is most of the old
  `dio200_detach()`.  It is called from the driver-specific detach
  routine.
* `amplc_dio200_set_enhance()`: this is a new function called during
  initialization of PCIe cards to enable "enhanced" mode.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/Makefile

@@ -12,6 +12,7 @@ obj-$(CONFIG_COMEDI_SKEL)		+= skel.o
 
 # Comedi ISA drivers
 obj-$(CONFIG_COMEDI_ACL7225B)		+= acl7225b.o
+obj-$(CONFIG_COMEDI_AMPLC_DIO200_ISA)	+= amplc_dio200.o
 obj-$(CONFIG_COMEDI_PCL711)		+= pcl711.o
 obj-$(CONFIG_COMEDI_PCL724)		+= pcl724.o
 obj-$(CONFIG_COMEDI_PCL725)		+= pcl725.o
@@ -77,7 +78,7 @@ obj-$(CONFIG_COMEDI_ADV_PCI1710)	+= adv_pci1710.o
 obj-$(CONFIG_COMEDI_ADV_PCI1723)	+= adv_pci1723.o
 obj-$(CONFIG_COMEDI_ADV_PCI1724)	+= adv_pci1724.o
 obj-$(CONFIG_COMEDI_ADV_PCI_DIO)	+= adv_pci_dio.o
-obj-$(CONFIG_COMEDI_AMPLC_DIO200)	+= amplc_dio200.o
+obj-$(CONFIG_COMEDI_AMPLC_DIO200_PCI)	+= amplc_dio200_pci.o
 obj-$(CONFIG_COMEDI_AMPLC_PC236)	+= amplc_pc236.o
 obj-$(CONFIG_COMEDI_AMPLC_PC263)	+= amplc_pc263.o
 obj-$(CONFIG_COMEDI_AMPLC_PCI224)	+= amplc_pci224.o
@@ -134,5 +135,6 @@ obj-$(CONFIG_COMEDI_NI_TIOCMD)		+= ni_tiocmd.o
 obj-$(CONFIG_COMEDI_NI_LABPC)		+= ni_labpc.o
 
 obj-$(CONFIG_COMEDI_8255)		+= 8255.o
+obj-$(CONFIG_COMEDI_AMPLC_DIO200)	+= amplc_dio200_common.o
 obj-$(CONFIG_COMEDI_DAS08)		+= das08.o
 obj-$(CONFIG_COMEDI_FC)			+= comedi_fc.o

drivers/staging/comedi/drivers/amplc_dio200.h

+/*
+    comedi/drivers/amplc_dio.h
+
+    Header for amplc_dio200.c, amplc_dio200_common.c and
+    amplc_dio200_pci.c.
+
+    Copyright (C) 2005-2013 MEV Ltd. <http://www.mev.co.uk/>
+
+    COMEDI - Linux Control and Measurement Device Interface
+    Copyright (C) 1998,2000 David A. Schleef <ds@schleef.org>
+
+    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.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#ifndef AMPLC_DIO200_H_INCLUDED
+#define AMPLC_DIO200_H_INCLUDED
+
+/* 200 series register area sizes */
+#define DIO200_IO_SIZE		0x20
+#define DIO200_PCIE_IO_SIZE	0x4000
+
+/*
+ * Register region.
+ */
+enum dio200_regtype { no_regtype = 0, io_regtype, mmio_regtype };
+struct dio200_region {
+	union {
+		unsigned long iobase;		/* I/O base address */
+		unsigned char __iomem *membase;	/* mapped MMIO base address */
+	} u;
+	enum dio200_regtype regtype;
+};
+
+/*
+ * Subdevice types.
+ */
+enum dio200_sdtype { sd_none, sd_intr, sd_8255, sd_8254, sd_timer };
+
+#define DIO200_MAX_SUBDEVS	8
+#define DIO200_MAX_ISNS		6
+
+/*
+ * Board descriptions.
+ */
+
+struct dio200_layout {
+	unsigned short n_subdevs;	/* number of subdevices */
+	unsigned char sdtype[DIO200_MAX_SUBDEVS];	/* enum dio200_sdtype */
+	unsigned char sdinfo[DIO200_MAX_SUBDEVS];	/* depends on sdtype */
+	bool has_int_sce:1;		/* has interrupt enable/status reg */
+	bool has_clk_gat_sce:1;		/* has clock/gate selection registers */
+	bool has_enhancements:1;	/* has enhanced features */
+};
+
+enum dio200_bustype { isa_bustype, pci_bustype };
+
+struct dio200_board {
+	const char *name;
+	struct dio200_layout layout;
+	enum dio200_bustype bustype;
+	unsigned char mainbar;
+	unsigned char mainshift;
+	unsigned int mainsize;
+};
+
+/*
+ * Comedi device private data.
+ */
+struct dio200_private {
+	struct dio200_region io;	/* Register region */
+	int intr_sd;
+};
+
+int amplc_dio200_common_attach(struct comedi_device *dev, unsigned int irq,
+			       unsigned long req_irq_flags);
+
+void amplc_dio200_common_detach(struct comedi_device *dev);
+
+/* Used by initialization of PCIe boards. */
+void amplc_dio200_set_enhance(struct comedi_device *dev, unsigned char val);
+
+#endif