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

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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>
This commit is contained in:
Ben Dooks 2009-03-19 15:02:39 +00:00 committed by Ben Dooks
parent 20934cdbaa
commit 97c1b14523
8 changed files with 136 additions and 89 deletions
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8
arch/arm/mach-s3c2410/include/mach/dma.h
View file

@ -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 */

7
arch/arm/plat-s3c/Kconfig
View file

@ -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

4
arch/arm/plat-s3c/Makefile
View file

@ -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

86
arch/arm/plat-s3c/dma.c Normal file
View file

@ -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);

22
arch/arm/plat-s3c/include/plat/dma-core.h Normal file
View file

@ -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[];

1
arch/arm/plat-s3c24xx/Kconfig
View file

@ -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

87
arch/arm/plat-s3c24xx/dma.c
View file

@ -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 */

10
arch/arm/plat-s3c24xx/include/plat/dma-plat.h
View file

@ -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 */
};