[ARM] S3C: Move DMA channel management code to plat-s3c

Change the name of S3C2410_DMA_CHANNELS to S3C_DMA_CHANNELS in the process.

Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

arch/arm/mach-s3c2410/include/mach/dma.h

@@ -55,9 +55,9 @@ enum dma_ch {
 
 /* we have 4 dma channels */
 #ifndef CONFIG_CPU_S3C2443
-#define S3C2410_DMA_CHANNELS		(4)
+#define S3C_DMA_CHANNELS		(4)
 #else
-#define S3C2410_DMA_CHANNELS		(6)
+#define S3C_DMA_CHANNELS		(6)
 #endif
 
 /* types */
@@ -192,10 +192,6 @@ struct s3c2410_dma_chan {
 	struct sys_device	dev;
 };
 
-/* the currently allocated channel information */
-extern struct s3c2410_dma_chan s3c2410_chans[];
-
-/* note, we don't really use dma_device_t at the moment */
 typedef unsigned long dma_device_t;
 
 #endif /* __ASM_ARCH_DMA_H */

arch/arm/plat-s3c/Kconfig

@@ -150,6 +150,13 @@ config S3C_GPIO_CFG_S3C64XX
 	  Internal configuration to enable S3C64XX style GPIO configuration
 	  functions.
 
+# DMA
+
+config S3C_DMA
+	bool
+	help
+	  Internal configuration for S3C DMA core
+
 # device definitions to compile in
 
 config S3C_DEV_HSMMC

arch/arm/plat-s3c/Makefile

@@ -18,6 +18,10 @@ obj-y				+= pwm-clock.o
 obj-y				+= gpio.o
 obj-y				+= gpio-config.o
 
+# DMA support
+
+obj-$(CONFIG_S3C_DMA)		+= dma.o
+
 # PM support
 
 obj-$(CONFIG_PM)		+= pm.o

arch/arm/plat-s3c/dma.c

@@ -0,0 +1,86 @@
+/* linux/arch/arm/plat-s3c/dma.c
+ *
+ * Copyright (c) 2003-2005,2006,2009 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *	http://armlinux.simtec.co.uk/
+ *
+ * S3C DMA core
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+struct s3c2410_dma_buf;
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+
+#include <mach/dma.h>
+#include <mach/irqs.h>
+
+#include <plat/dma-plat.h>
+
+/* dma channel state information */
+struct s3c2410_dma_chan s3c2410_chans[S3C_DMA_CHANNELS];
+struct s3c2410_dma_chan *s3c_dma_chan_map[DMACH_MAX];
+
+/* s3c_dma_lookup_channel
+ *
+ * change the dma channel number given into a real dma channel id
+*/
+
+struct s3c2410_dma_chan *s3c_dma_lookup_channel(unsigned int channel)
+{
+	if (channel & DMACH_LOW_LEVEL)
+		return &s3c2410_chans[channel & ~DMACH_LOW_LEVEL];
+	else
+		return s3c_dma_chan_map[channel];
+}
+
+/* do we need to protect the settings of the fields from
+ * irq?
+*/
+
+int s3c2410_dma_set_opfn(unsigned int channel, s3c2410_dma_opfn_t rtn)
+{
+	struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
+
+	if (chan == NULL)
+		return -EINVAL;
+
+	pr_debug("%s: chan=%p, op rtn=%p\n", __func__, chan, rtn);
+
+	chan->op_fn = rtn;
+
+	return 0;
+}
+EXPORT_SYMBOL(s3c2410_dma_set_opfn);
+
+int s3c2410_dma_set_buffdone_fn(unsigned int channel, s3c2410_dma_cbfn_t rtn)
+{
+	struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
+
+	if (chan == NULL)
+		return -EINVAL;
+
+	pr_debug("%s: chan=%p, callback rtn=%p\n", __func__, chan, rtn);
+
+	chan->callback_fn = rtn;
+
+	return 0;
+}
+EXPORT_SYMBOL(s3c2410_dma_set_buffdone_fn);
+
+int s3c2410_dma_setflags(unsigned int channel, unsigned int flags)
+{
+	struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
+
+	if (chan == NULL)
+		return -EINVAL;
+
+	chan->flags = flags;
+	return 0;
+}
+EXPORT_SYMBOL(s3c2410_dma_setflags);

arch/arm/plat-s3c/include/plat/dma-core.h

@@ -0,0 +1,22 @@
+/* arch/arm/plat-s3c/include/plat/dma.h
+ *
+ * Copyright 2008 Openmoko, Inc.
+ * Copyright 2008 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *	http://armlinux.simtec.co.uk/
+ *
+ * Samsung S3C DMA core support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+extern struct s3c2410_dma_chan *s3c_dma_lookup_channel(unsigned int channel);
+
+extern struct s3c2410_dma_chan *s3c_dma_chan_map[];
+
+/* the currently allocated channel information */
+extern struct s3c2410_dma_chan s3c2410_chans[];
+
+

arch/arm/plat-s3c24xx/Kconfig

@@ -71,6 +71,7 @@ config PM_SIMTEC
 config S3C2410_DMA
 	bool "S3C2410 DMA support"
 	depends on ARCH_S3C2410
+	select S3C_DMA
 	help
 	  S3C2410 DMA support. This is needed for drivers like sound which
 	  use the S3C2410's DMA system to move data to and from the

arch/arm/plat-s3c24xx/dma.c

@@ -44,8 +44,6 @@ static int dma_channels;
 
 static struct s3c24xx_dma_selection dma_sel;
 
-/* dma channel state information */
-struct s3c2410_dma_chan s3c2410_chans[S3C2410_DMA_CHANNELS];
 
 /* debugging functions */
 
@@ -135,21 +133,6 @@ dmadbg_showregs(const char *fname, int line, struct s3c2410_dma_chan *chan)
 #define dbg_showchan(chan) do { } while(0)
 #endif /* CONFIG_S3C2410_DMA_DEBUG */
 
-static struct s3c2410_dma_chan *dma_chan_map[DMACH_MAX];
-
-/* lookup_dma_channel
- *
- * change the dma channel number given into a real dma channel id
-*/
-
-static struct s3c2410_dma_chan *lookup_dma_channel(unsigned int channel)
-{
-	if (channel & DMACH_LOW_LEVEL)
-		return &s3c2410_chans[channel & ~DMACH_LOW_LEVEL];
-	else
-		return dma_chan_map[channel];
-}
-
 /* s3c2410_dma_stats_timeout
  *
  * Update DMA stats from timeout info
@@ -214,8 +197,6 @@ s3c2410_dma_waitforload(struct s3c2410_dma_chan *chan, int line)
 	return 0;
 }
 
-
-
 /* s3c2410_dma_loadbuffer
  *
  * load a buffer, and update the channel state
@@ -453,7 +434,7 @@ s3c2410_dma_canload(struct s3c2410_dma_chan *chan)
 int s3c2410_dma_enqueue(unsigned int channel, void *id,
 			dma_addr_t data, int size)
 {
-	struct s3c2410_dma_chan *chan = lookup_dma_channel(channel);
+	struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
 	struct s3c2410_dma_buf *buf;
 	unsigned long flags;
 
@@ -804,7 +785,7 @@ EXPORT_SYMBOL(s3c2410_dma_request);
 
 int s3c2410_dma_free(unsigned int channel, struct s3c2410_dma_client *client)
 {
-	struct s3c2410_dma_chan *chan = lookup_dma_channel(channel);
+	struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
 	unsigned long flags;
 
 	if (chan == NULL)
@@ -836,7 +817,7 @@ int s3c2410_dma_free(unsigned int channel, struct s3c2410_dma_client *client)
 	chan->irq_claimed = 0;
 
 	if (!(channel & DMACH_LOW_LEVEL))
-		dma_chan_map[channel] = NULL;
+		s3c_dma_chan_map[channel] = NULL;
 
 	local_irq_restore(flags);
 
@@ -995,7 +976,7 @@ static int s3c2410_dma_started(struct s3c2410_dma_chan *chan)
 int
 s3c2410_dma_ctrl(unsigned int channel, enum s3c2410_chan_op op)
 {
-	struct s3c2410_dma_chan *chan = lookup_dma_channel(channel);
+	struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
 
 	if (chan == NULL)
 		return -EINVAL;
@@ -1043,7 +1024,7 @@ EXPORT_SYMBOL(s3c2410_dma_ctrl);
 int s3c2410_dma_config(unsigned int channel,
 		       int xferunit)
 {
-	struct s3c2410_dma_chan *chan = lookup_dma_channel(channel);
+	struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
 	unsigned int dcon;
 
 	pr_debug("%s: chan=%d, xfer_unit=%d, dcon=%08x\n",
@@ -1112,58 +1093,6 @@ int s3c2410_dma_config(unsigned int channel,
 
 EXPORT_SYMBOL(s3c2410_dma_config);
 
-int s3c2410_dma_setflags(unsigned int channel, unsigned int flags)
-{
-	struct s3c2410_dma_chan *chan = lookup_dma_channel(channel);
-
-	if (chan == NULL)
-		return -EINVAL;
-
-	pr_debug("%s: chan=%p, flags=%08x\n", __func__, chan, flags);
-
-	chan->flags = flags;
-
-	return 0;
-}
-
-EXPORT_SYMBOL(s3c2410_dma_setflags);
-
-
-/* do we need to protect the settings of the fields from
- * irq?
-*/
-
-int s3c2410_dma_set_opfn(unsigned int channel, s3c2410_dma_opfn_t rtn)
-{
-	struct s3c2410_dma_chan *chan = lookup_dma_channel(channel);
-
-	if (chan == NULL)
-		return -EINVAL;
-
-	pr_debug("%s: chan=%p, op rtn=%p\n", __func__, chan, rtn);
-
-	chan->op_fn = rtn;
-
-	return 0;
-}
-
-EXPORT_SYMBOL(s3c2410_dma_set_opfn);
-
-int s3c2410_dma_set_buffdone_fn(unsigned int channel, s3c2410_dma_cbfn_t rtn)
-{
-	struct s3c2410_dma_chan *chan = lookup_dma_channel(channel);
-
-	if (chan == NULL)
-		return -EINVAL;
-
-	pr_debug("%s: chan=%p, callback rtn=%p\n", __func__, chan, rtn);
-
-	chan->callback_fn = rtn;
-
-	return 0;
-}
-
-EXPORT_SYMBOL(s3c2410_dma_set_buffdone_fn);
 
 /* s3c2410_dma_devconfig
  *
@@ -1179,7 +1108,7 @@ int s3c2410_dma_devconfig(int channel,
 			  enum s3c2410_dmasrc source,
 			  unsigned long devaddr)
 {
-	struct s3c2410_dma_chan *chan = lookup_dma_channel(channel);
+	struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
 	unsigned int hwcfg;
 
 	if (chan == NULL)
@@ -1250,7 +1179,7 @@ EXPORT_SYMBOL(s3c2410_dma_devconfig);
 
 int s3c2410_dma_getposition(unsigned int channel, dma_addr_t *src, dma_addr_t *dst)
 {
- 	struct s3c2410_dma_chan *chan = lookup_dma_channel(channel);
+	struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
 
 	if (chan == NULL)
 		return -EINVAL;
@@ -1508,7 +1437,7 @@ static struct s3c2410_dma_chan *s3c2410_dma_map_channel(int channel)
 	dmach = &s3c2410_chans[ch];
 	dmach->map = ch_map;
 	dmach->req_ch = channel;
-	dma_chan_map[channel] = dmach;
+	s3c_dma_chan_map[channel] = dmach;
 
 	/* select the channel */
 

arch/arm/plat-s3c24xx/include/plat/dma-plat.h

@@ -10,8 +10,10 @@
  * published by the Free Software Foundation.
 */
 
+#include <plat/dma-core.h>
+
 extern struct sysdev_class dma_sysclass;
-extern struct s3c2410_dma_chan s3c2410_chans[S3C2410_DMA_CHANNELS];
+extern struct s3c2410_dma_chan s3c2410_chans[S3C_DMA_CHANNELS];
 
 #define DMA_CH_VALID		(1<<31)
 #define DMA_CH_NEVER		(1<<30)
@@ -31,8 +33,8 @@ struct s3c24xx_dma_map {
 	const char		*name;
 	struct s3c24xx_dma_addr  hw_addr;
 
-	unsigned long		 channels[S3C2410_DMA_CHANNELS];
-	unsigned long		 channels_rx[S3C2410_DMA_CHANNELS];
+	unsigned long		 channels[S3C_DMA_CHANNELS];
+	unsigned long		 channels_rx[S3C_DMA_CHANNELS];
 };
 
 struct s3c24xx_dma_selection {
@@ -58,7 +60,7 @@ extern int s3c24xx_dma_init_map(struct s3c24xx_dma_selection *sel);
 */
 
 struct s3c24xx_dma_order_ch {
-	unsigned int	list[S3C2410_DMA_CHANNELS];	/* list of channels */
+	unsigned int	list[S3C_DMA_CHANNELS];	/* list of channels */
 	unsigned int	flags;				/* flags */
 };