comedi: Move "comedi_isadma.h" to <linux/comedi/comedi_isadma.h>

Some of the header files in "drivers/comedi/drivers/" are common enough
to be useful to out-of-tree comedi driver modules.  Using them for
out-of-tree module builds is hampered by the headers being outside the
"include/" directory so it is desirable to move them.

There are about a half a dozen or so Comedi device drivers that use the
"comedi_isadma" module to add ISA DMA support.  The macros and
declarations to use that module are in the "comedi_isadma.h" header file
in the comedi "drivers" directory.  Move it into
"include/linux/comedi/".

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Link: https://lore.kernel.org/r/20211117120604.117740-6-abbotti@mev.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

10 files changed, 9 insertions, 131 deletions

diff --git a/drivers/comedi/drivers/comedi_isadma.c b/drivers/comedi/drivers/comedi_isadma.c
index 63457bd4ff78..700982464c53 100644
--- a/drivers/comedi/drivers/comedi_isadma.c
+++ b/drivers/comedi/drivers/comedi_isadma.c
@@ -10,8 +10,7 @@
 #include <linux/dma-mapping.h>
 #include <asm/dma.h>
 #include <linux/comedi/comedidev.h>
-
-#include "comedi_isadma.h"
+#include <linux/comedi/comedi_isadma.h>
 
 /**
  * comedi_isadma_program - program and enable an ISA DMA transfer
diff --git a/drivers/comedi/drivers/comedi_isadma.h b/drivers/comedi/drivers/comedi_isadma.h
deleted file mode 100644
index 9d2b12db7e6e..000000000000
--- a/drivers/comedi/drivers/comedi_isadma.h
+++ /dev/null
@@ -1,114 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0+ */
-/*
- * COMEDI ISA DMA support functions
- * Copyright (c) 2014 H Hartley Sweeten <hsweeten@visionengravers.com>
- */
-
-#ifndef _COMEDI_ISADMA_H
-#define _COMEDI_ISADMA_H
-
-#include <linux/types.h>
-
-struct comedi_device;
-struct device;
-
-/*
- * These are used to avoid issues when <asm/dma.h> and the DMA_MODE_
- * defines are not available.
- */
-#define COMEDI_ISADMA_READ	0
-#define COMEDI_ISADMA_WRITE	1
-
-/**
- * struct comedi_isadma_desc - cookie for ISA DMA
- * @virt_addr:	virtual address of buffer
- * @hw_addr:	hardware (bus) address of buffer
- * @chan:	DMA channel
- * @maxsize:	allocated size of buffer (in bytes)
- * @size:	transfer size (in bytes)
- * @mode:	DMA_MODE_READ or DMA_MODE_WRITE
- */
-struct comedi_isadma_desc {
-	void *virt_addr;
-	dma_addr_t hw_addr;
-	unsigned int chan;
-	unsigned int maxsize;
-	unsigned int size;
-	char mode;
-};
-
-/**
- * struct comedi_isadma - ISA DMA data
- * @dev:	device to allocate non-coherent memory for
- * @desc:	cookie for each DMA buffer
- * @n_desc:	the number of cookies
- * @cur_dma:	the current cookie in use
- * @chan:	the first DMA channel requested
- * @chan2:	the second DMA channel requested
- */
-struct comedi_isadma {
-	struct device *dev;
-	struct comedi_isadma_desc *desc;
-	int n_desc;
-	int cur_dma;
-	unsigned int chan;
-	unsigned int chan2;
-};
-
-#if IS_ENABLED(CONFIG_ISA_DMA_API)
-
-void comedi_isadma_program(struct comedi_isadma_desc *desc);
-unsigned int comedi_isadma_disable(unsigned int dma_chan);
-unsigned int comedi_isadma_disable_on_sample(unsigned int dma_chan,
-					     unsigned int size);
-unsigned int comedi_isadma_poll(struct comedi_isadma *dma);
-void comedi_isadma_set_mode(struct comedi_isadma_desc *desc, char dma_dir);
-
-struct comedi_isadma *comedi_isadma_alloc(struct comedi_device *dev,
-					  int n_desc, unsigned int dma_chan1,
-					  unsigned int dma_chan2,
-					  unsigned int maxsize, char dma_dir);
-void comedi_isadma_free(struct comedi_isadma *dma);
-
-#else	/* !IS_ENABLED(CONFIG_ISA_DMA_API) */
-
-static inline void comedi_isadma_program(struct comedi_isadma_desc *desc)
-{
-}
-
-static inline unsigned int comedi_isadma_disable(unsigned int dma_chan)
-{
-	return 0;
-}
-
-static inline unsigned int
-comedi_isadma_disable_on_sample(unsigned int dma_chan, unsigned int size)
-{
-	return 0;
-}
-
-static inline unsigned int comedi_isadma_poll(struct comedi_isadma *dma)
-{
-	return 0;
-}
-
-static inline void comedi_isadma_set_mode(struct comedi_isadma_desc *desc,
-					  char dma_dir)
-{
-}
-
-static inline struct comedi_isadma *
-comedi_isadma_alloc(struct comedi_device *dev, int n_desc,
-		    unsigned int dma_chan1, unsigned int dma_chan2,
-		    unsigned int maxsize, char dma_dir)
-{
-	return NULL;
-}
-
-static inline void comedi_isadma_free(struct comedi_isadma *dma)
-{
-}
-
-#endif	/* !IS_ENABLED(CONFIG_ISA_DMA_API) */
-
-#endif	/* #ifndef _COMEDI_ISADMA_H */
diff --git a/drivers/comedi/drivers/das16.c b/drivers/comedi/drivers/das16.c
index f6649ffa9670..937a69ce0977 100644
--- a/drivers/comedi/drivers/das16.c
+++ b/drivers/comedi/drivers/das16.c
@@ -66,8 +66,7 @@
 #include <linux/comedi/comedidev.h>
 #include <linux/comedi/comedi_8255.h>
 #include <linux/comedi/comedi_8254.h>
-
-#include "comedi_isadma.h"
+#include <linux/comedi/comedi_isadma.h>
 
 #define DAS16_DMA_SIZE 0xff00	/*  size in bytes of allocated dma buffer */
 
diff --git a/drivers/comedi/drivers/das1800.c b/drivers/comedi/drivers/das1800.c
index a43d3414a122..f09608c0f4ff 100644
--- a/drivers/comedi/drivers/das1800.c
+++ b/drivers/comedi/drivers/das1800.c
@@ -75,8 +75,7 @@
 #include <linux/io.h>
 #include <linux/comedi/comedidev.h>
 #include <linux/comedi/comedi_8254.h>
-
-#include "comedi_isadma.h"
+#include <linux/comedi/comedi_isadma.h>
 
 /* misc. defines */
 #define DAS1800_SIZE           16	/* uses 16 io addresses */
diff --git a/drivers/comedi/drivers/dt282x.c b/drivers/comedi/drivers/dt282x.c
index 078f8fba7183..4ae80e6c7266 100644
--- a/drivers/comedi/drivers/dt282x.c
+++ b/drivers/comedi/drivers/dt282x.c
@@ -52,8 +52,7 @@
 #include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/comedi/comedidev.h>
-
-#include "comedi_isadma.h"
+#include <linux/comedi/comedi_isadma.h>
 
 /*
  * Register map
diff --git a/drivers/comedi/drivers/ni_at_a2150.c b/drivers/comedi/drivers/ni_at_a2150.c
index 9942d770add8..df8d219e6723 100644
--- a/drivers/comedi/drivers/ni_at_a2150.c
+++ b/drivers/comedi/drivers/ni_at_a2150.c
@@ -41,8 +41,7 @@
 #include <linux/io.h>
 #include <linux/comedi/comedidev.h>
 #include <linux/comedi/comedi_8254.h>
-
-#include "comedi_isadma.h"
+#include <linux/comedi/comedi_isadma.h>
 
 #define A2150_DMA_BUFFER_SIZE	0xff00	/*  size in bytes of dma buffer */
 
diff --git a/drivers/comedi/drivers/ni_labpc_isadma.c b/drivers/comedi/drivers/ni_labpc_isadma.c
index dd37ec0d9b15..0652ca8345b6 100644
--- a/drivers/comedi/drivers/ni_labpc_isadma.c
+++ b/drivers/comedi/drivers/ni_labpc_isadma.c
@@ -11,8 +11,8 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/comedi/comedidev.h>
+#include <linux/comedi/comedi_isadma.h>
 
-#include "comedi_isadma.h"
 #include "ni_labpc.h"
 #include "ni_labpc_regs.h"
 #include "ni_labpc_isadma.h"
diff --git a/drivers/comedi/drivers/pcl812.c b/drivers/comedi/drivers/pcl812.c
index 790f54476a91..70dbc129fcf5 100644
--- a/drivers/comedi/drivers/pcl812.c
+++ b/drivers/comedi/drivers/pcl812.c
@@ -116,8 +116,7 @@
 #include <linux/io.h>
 #include <linux/comedi/comedidev.h>
 #include <linux/comedi/comedi_8254.h>
-
-#include "comedi_isadma.h"
+#include <linux/comedi/comedi_isadma.h>
 
 /*
  * Register I/O map
diff --git a/drivers/comedi/drivers/pcl816.c b/drivers/comedi/drivers/pcl816.c
index 77b30246d966..a5e5320be648 100644
--- a/drivers/comedi/drivers/pcl816.c
+++ b/drivers/comedi/drivers/pcl816.c
@@ -37,8 +37,7 @@
 #include <linux/interrupt.h>
 #include <linux/comedi/comedidev.h>
 #include <linux/comedi/comedi_8254.h>
-
-#include "comedi_isadma.h"
+#include <linux/comedi/comedi_isadma.h>
 
 /*
  * Register I/O map
diff --git a/drivers/comedi/drivers/pcl818.c b/drivers/comedi/drivers/pcl818.c
index e5b7793cce05..29e503de8267 100644
--- a/drivers/comedi/drivers/pcl818.c
+++ b/drivers/comedi/drivers/pcl818.c
@@ -99,8 +99,7 @@
 #include <linux/interrupt.h>
 #include <linux/comedi/comedidev.h>
 #include <linux/comedi/comedi_8254.h>
-
-#include "comedi_isadma.h"
+#include <linux/comedi/comedi_isadma.h>
 
 /*
  * Register I/O map