blob: 22536b85a81d5323cf1fda51ee9462279a9bcf1d [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/arch/arm/kernel/dma-ebsa285.c
3 *
4 * Copyright (C) 1998 Phil Blundell
5 *
6 * DMA functions specific to EBSA-285/CATS architectures
7 *
8 * Changelog:
9 * 09-Nov-1998 RMK Split out ISA DMA functions to dma-isa.c
10 * 17-Mar-1999 RMK Allow any EBSA285-like architecture to have
11 * ISA DMA controllers.
12 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#include <linux/init.h>
Russell Kingfced80c2008-09-06 12:10:45 +010014#include <linux/io.h>
Russell King70d13e02008-12-06 08:25:16 +000015#include <linux/spinlock.h>
Christoph Hellwig84be4562015-05-01 12:46:15 +020016#include <linux/scatterlist.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017
18#include <asm/dma.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019
20#include <asm/mach/dma.h>
21#include <asm/hardware/dec21285.h>
22
23#if 0
Russell King1df81302008-12-08 15:58:50 +000024static int fb_dma_request(unsigned int chan, dma_t *dma)
Linus Torvalds1da177e2005-04-16 15:20:36 -070025{
26 return -EINVAL;
27}
28
Russell King1df81302008-12-08 15:58:50 +000029static void fb_dma_enable(unsigned int chan, dma_t *dma)
Linus Torvalds1da177e2005-04-16 15:20:36 -070030{
31}
32
Russell King1df81302008-12-08 15:58:50 +000033static void fb_dma_disable(unsigned int chan, dma_t *dma)
Linus Torvalds1da177e2005-04-16 15:20:36 -070034{
35}
36
37static struct dma_ops fb_dma_ops = {
38 .type = "fb",
39 .request = fb_dma_request,
40 .enable = fb_dma_enable,
41 .disable = fb_dma_disable,
42};
43#endif
44
Russell King2f757f22008-12-08 16:33:30 +000045static int __init fb_dma_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070046{
47#if 0
48 dma[_DC21285_DMA(0)].d_ops = &fb_dma_ops;
49 dma[_DC21285_DMA(1)].d_ops = &fb_dma_ops;
50#endif
51#ifdef CONFIG_ISA_DMA
52 if (footbridge_cfn_mode())
Russell King2f757f22008-12-08 16:33:30 +000053 isa_init_dma();
Linus Torvalds1da177e2005-04-16 15:20:36 -070054#endif
Russell King2f757f22008-12-08 16:33:30 +000055 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070056}
Russell King2f757f22008-12-08 16:33:30 +000057core_initcall(fb_dma_init);