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/* MN10300 ISA DMA handlers and definitions
 *
 * Copyright (C) 2007 Matsushita Electric Industrial Co., Ltd.
 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public Licence
 * as published by the Free Software Foundation; either version
 * 2 of the Licence, or (at your option) any later version.
 */
#ifndef _ASM_DMA_H
#define _ASM_DMA_H

#include <linux/spinlock.h>
#include <asm/io.h>
#include <linux/delay.h>

#undef MAX_DMA_CHANNELS		/* switch off linux/kernel/dma.c */
#define MAX_DMA_ADDRESS		0xbfffffff

extern spinlock_t dma_spin_lock;

static inline unsigned long claim_dma_lock(void)
{
	unsigned long flags;
	spin_lock_irqsave(&dma_spin_lock, flags);
	return flags;
}

static inline void release_dma_lock(unsigned long flags)
{
	spin_unlock_irqrestore(&dma_spin_lock, flags);
}

/* enable/disable a specific DMA channel */
static inline void enable_dma(unsigned int dmanr)
{
}

static inline void disable_dma(unsigned int dmanr)
{
}

/* Clear the 'DMA Pointer Flip Flop'.
 * Write 0 for LSB/MSB, 1 for MSB/LSB access.
 * Use this once to initialize the FF to a known state.
 * After that, keep track of it. :-)
 * --- In order to do that, the DMA routines below should ---
 * --- only be used while holding the DMA lock ! ---
 */
static inline void clear_dma_ff(unsigned int dmanr)
{
}

/* set mode (above) for a specific DMA channel */
static inline void set_dma_mode(unsigned int dmanr, char mode)
{
}

/* Set only the page register bits of the transfer address.
 * This is used for successive transfers when we know the contents of
 * the lower 16 bits of the DMA current address register, but a 64k boundary
 * may have been crossed.
 */
static inline void set_dma_page(unsigned int dmanr, char pagenr)
{
}


/* Set transfer address & page bits for specific DMA channel.
 * Assumes dma flipflop is clear.
 */
static inline void set_dma_addr(unsigned int dmanr, unsigned int a)
{
}


/* Set transfer size (max 64k for DMA1..3, 128k for DMA5..7) for
 * a specific DMA channel.
 * You must ensure the parameters are valid.
 * NOTE: from a manual: "the number of transfers is one more
 * than the initial word count"! This is taken into account.
 * Assumes dma flip-flop is clear.
 * NOTE 2: "count" represents _bytes_ and must be even for channels 5-7.
 */
static inline void set_dma_count(unsigned int dmanr, unsigned int count)
{
}


/* Get DMA residue count. After a DMA transfer, this
 * should return zero. Reading this while a DMA transfer is
 * still in progress will return unpredictable results.
 * If called before the channel has been used, it may return 1.
 * Otherwise, it returns the number of _bytes_ left to transfer.
 *
 * Assumes DMA flip-flop is clear.
 */
static inline int get_dma_residue(unsigned int dmanr)
{
	return 0;
}


/* These are in kernel/dma.c: */
extern int request_dma(unsigned int dmanr, const char *device_id);
extern void free_dma(unsigned int dmanr);

/* From PCI */

#ifdef CONFIG_PCI
extern int isa_dma_bridge_buggy;
#else
#define isa_dma_bridge_buggy 	(0)
#endif

#endif /* _ASM_DMA_H */

Filemanager

Name Type Size Permission Actions
Kbuild File 314 B 0644
asm-offsets.h File 35 B 0644
atomic.h File 4.02 KB 0644
bitops.h File 5.42 KB 0644
bug.h File 864 B 0644
bugs.h File 561 B 0644
busctl-regs.h File 7.8 KB 0644
cache.h File 2.06 KB 0644
cacheflush.h File 7.6 KB 0644
checksum.h File 2.09 KB 0644
cmpxchg.h File 2.65 KB 0644
cpu-regs.h File 16.61 KB 0644
current.h File 922 B 0644
debugger.h File 1.2 KB 0644
delay.h File 597 B 0644
div64.h File 3.21 KB 0644
dma-mapping.h File 636 B 0644
dma.h File 3.09 KB 0644
dmactl-regs.h File 532 B 0644
elf.h File 4.49 KB 0644
emergency-restart.h File 43 B 0644
exceptions.h File 4.74 KB 0644
fpu.h File 3.57 KB 0644
frame.inc File 2.37 KB 0644
ftrace.h File 12 B 0644
futex.h File 31 B 0644
gdb-stub.h File 5.42 KB 0644
hardirq.h File 1.68 KB 0644
highmem.h File 3.01 KB 0644
hw_irq.h File 483 B 0644
intctl-regs.h File 2.26 KB 0644
io.h File 7.67 KB 0644
irq.h File 1.11 KB 0644
irq_regs.h File 751 B 0644
irqflags.h File 4.05 KB 0644
kdebug.h File 561 B 0644
kgdb.h File 1.7 KB 0644
kmap_types.h File 160 B 0644
kprobes.h File 1.59 KB 0644
linkage.h File 593 B 0644
local.h File 31 B 0644
local64.h File 33 B 0644
mc146818rtc.h File 26 B 0644
mmu.h File 434 B 0644
mmu_context.h File 4.44 KB 0644
module.h File 677 B 0644
nmi.h File 500 B 0644
page.h File 3.63 KB 0644
page_offset.h File 302 B 0644
pci.h File 2.17 KB 0644
percpu.h File 32 B 0644
pgalloc.h File 1.49 KB 0644
pgtable.h File 15.68 KB 0644
pio-regs.h File 7.53 KB 0644
processor.h File 4.12 KB 0644
ptrace.h File 805 B 0644
reset-regs.h File 1.8 KB 0644
rtc-regs.h File 3.57 KB 0644
rtc.h File 692 B 0644
rwlock.h File 2.98 KB 0644
serial-regs.h File 8.85 KB 0644
serial.h File 1.02 KB 0644
setup.h File 574 B 0644
shmparam.h File 182 B 0644
signal.h File 888 B 0644
smp.h File 3.06 KB 0644
smsc911x.h File 27 B 0644
spinlock.h File 3.84 KB 0644
spinlock_types.h File 445 B 0644
string.h File 1.03 KB 0644
switch_to.h File 1.49 KB 0644
syscall.h File 2.38 KB 0644
termios.h File 387 B 0644
thread_info.h File 4.36 KB 0644
timer-regs.h File 20.72 KB 0644
timex.h File 843 B 0644
tlb.h File 941 B 0644
tlbflush.h File 3.45 KB 0644
topology.h File 34 B 0644
types.h File 620 B 0644
uaccess.h File 7.78 KB 0644
ucontext.h File 673 B 0644
unaligned.h File 678 B 0644
unistd.h File 1.34 KB 0644
user.h File 1.91 KB 0644
vga.h File 471 B 0644
xor.h File 29 B 0644