path: root/arch/arm/plat-omap/dma.c

/*
 * linux/arch/arm/plat-omap/dma.c
 *
 * Copyright (C) 2003 Nokia Corporation
 * Author: Juha Yrj�l� <juha.yrjola@nokia.com>
 * DMA channel linking for 1610 by Samuel Ortiz <samuel.ortiz@nokia.com>
 * Graphics DMA and LCD DMA graphics tranformations
 * by Imre Deak <imre.deak@nokia.com>
 * OMAP2 support Copyright (C) 2004-2005 Texas Instruments, Inc.
 * Merged to support both OMAP1 and OMAP2 by Tony Lindgren <tony@atomide.com>
 * Some functions based on earlier dma-omap.c Copyright (C) 2001 RidgeRun, Inc.
 *
 * Support functions for the OMAP internal DMA channels.
 *
 * 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.
 *
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/spinlock.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/irq.h>

#include <asm/system.h>
#include <asm/hardware.h>
#include <asm/dma.h>
#include <asm/io.h>

#include <asm/arch/tc.h>

#define DEBUG_PRINTS
#undef DEBUG_PRINTS
#ifdef DEBUG_PRINTS
#define debug_printk(x) printk x
#else
#define	debug_printk(x)
#endif

#define OMAP_DMA_ACTIVE		0x01
#define OMAP_DMA_CCR_EN		(1 << 7)
#define OMAP2_DMA_CSR_CLEAR_MASK	0xffe

#define OMAP_FUNC_MUX_ARM_BASE	(0xfffe1000 + 0xec)

static int enable_1510_mode = 0;

struct omap_dma_lch {
	int next_lch;
	int dev_id;
	u16 saved_csr;
	u16 enabled_irqs;
	const char *dev_name;
	void (* callback)(int lch