126 lines
2.7 KiB
C
126 lines
2.7 KiB
C
/* linux/include/asm-arm/arch-bast/dma.h
|
|
*
|
|
* Copyright (C) 2003,2004 Simtec Electronics
|
|
* Ben Dooks <ben@simtec.co.uk>
|
|
*
|
|
* Samsung S3C PWM 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.
|
|
*
|
|
* Changelog:
|
|
* ??-May-2003 BJD Created file
|
|
* ??-Jun-2003 BJD Added more dma functionality to go with arch
|
|
* 10-Nov-2004 BJD Added sys_device support
|
|
*/
|
|
|
|
#ifndef __ASM_ARCH_DMA_H
|
|
#define __ASM_ARCH_DMA_H __FILE__
|
|
|
|
#include <linux/sysdev.h>
|
|
#include <asm/arch/regs-timer.h>
|
|
|
|
|
|
#define pwmch_t int
|
|
|
|
/* we have 4 pwm channels */
|
|
#define S3C_PWM_CHANNELS 4
|
|
|
|
|
|
struct s3c_pwm_client {
|
|
char *name;
|
|
};
|
|
|
|
typedef struct s3c_pwm_client s3c_pwm_client_t;
|
|
|
|
|
|
typedef struct s3c_pwm_chan_s s3c2443_pwm_chan_t;
|
|
|
|
/* s3c_pwm_cbfn_t
|
|
*
|
|
* buffer callback routine type
|
|
*/
|
|
|
|
typedef void (*s3c_pwm_cbfn_t)(void *buf);
|
|
|
|
|
|
|
|
/* struct s3c_pwm_chan_s
|
|
*
|
|
* full state information for each DMA channel
|
|
*/
|
|
|
|
struct s3c_pwm_chan_s {
|
|
/* channel state flags and information */
|
|
unsigned char number; /* number of this dma channel */
|
|
unsigned char in_use; /* channel allocated */
|
|
unsigned char irq_claimed; /* irq claimed for channel */
|
|
unsigned char irq_enabled; /* irq enabled for channel */
|
|
|
|
/* channel state */
|
|
|
|
s3c_pwm_client_t *client;
|
|
void *dev;
|
|
/* channel configuration */
|
|
unsigned int flags; /* channel flags */
|
|
|
|
/* channel's hardware position and configuration */
|
|
unsigned int irq; /* channel irq */
|
|
|
|
/* driver handles */
|
|
s3c_pwm_cbfn_t callback_fn; /* buffer done callback */
|
|
|
|
/* system device */
|
|
struct sys_device sysdev;
|
|
};
|
|
|
|
/* the currently allocated channel information */
|
|
extern s3c2443_pwm_chan_t s3c_chans[];
|
|
|
|
|
|
/* functions --------------------------------------------------------------- */
|
|
|
|
/* s3c6400_pwm_request
|
|
*
|
|
* request a pwm channel exclusivley
|
|
*/
|
|
|
|
extern int s3c2443_pwm_request(pwmch_t channel, s3c_pwm_client_t *, void *dev);
|
|
|
|
|
|
/* s3c_dma_ctrl
|
|
*
|
|
* change the state of the dma channel
|
|
*/
|
|
|
|
//extern int s3c_dma_ctrl(dmach_t channel, s3c_chan_op_t op);
|
|
|
|
/* s3c_dma_setflags
|
|
*
|
|
* set the channel's flags to a given state
|
|
*/
|
|
|
|
|
|
/* s3c6400_pwm_free
|
|
*
|
|
* free the dma channel (will also abort any outstanding operations)
|
|
*/
|
|
|
|
extern int s3c2443_pwm_free(pwmch_t channel, s3c_pwm_client_t *);
|
|
|
|
|
|
/* s3c_dma_config
|
|
*
|
|
* configure the dma channel
|
|
*/
|
|
|
|
|
|
|
|
|
|
extern int s3c2443_pwm_set_buffdone_fn(pwmch_t, s3c_pwm_cbfn_t rtn);
|
|
|
|
extern int s3c2443_timer_setup (int channel, int usec, unsigned long g_tcnt, unsigned long g_tcmp);
|
|
|
|
#endif /* __ASM_ARCH_DMA_H */
|