aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-imx/include/mach/imx-dma.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-imx/include/mach/imx-dma.h')
-rw-r--r--arch/arm/mach-imx/include/mach/imx-dma.h98
1 files changed, 0 insertions, 98 deletions
diff --git a/arch/arm/mach-imx/include/mach/imx-dma.h b/arch/arm/mach-imx/include/mach/imx-dma.h
deleted file mode 100644
index bbe54df7f0de..000000000000
--- a/arch/arm/mach-imx/include/mach/imx-dma.h
+++ /dev/null
@@ -1,98 +0,0 @@
1/*
2 * linux/include/asm-arm/imxads/dma.h
3 *
4 * Copyright (C) 1997,1998 Russell King
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21#include <mach/dma.h>
22
23#ifndef __ASM_ARCH_IMX_DMA_H
24#define __ASM_ARCH_IMX_DMA_H
25
26#define IMX_DMA_CHANNELS 11
27
28/*
29 * struct imx_dma_channel - i.MX specific DMA extension
30 * @name: name specified by DMA client
31 * @irq_handler: client callback for end of transfer
32 * @err_handler: client callback for error condition
33 * @data: clients context data for callbacks
34 * @dma_mode: direction of the transfer %DMA_MODE_READ or %DMA_MODE_WRITE
35 * @sg: pointer to the actual read/written chunk for scatter-gather emulation
36 * @sgbc: counter of processed bytes in the actual read/written chunk
37 * @resbytes: total residual number of bytes to transfer
38 * (it can be lower or same as sum of SG mapped chunk sizes)
39 * @sgcount: number of chunks to be read/written
40 *
41 * Structure is used for IMX DMA processing. It would be probably good
42 * @struct dma_struct in the future for external interfacing and use
43 * @struct imx_dma_channel only as extension to it.
44 */
45
46struct imx_dma_channel {
47 const char *name;
48 void (*irq_handler) (int, void *);
49 void (*err_handler) (int, void *, int errcode);
50 void *data;
51 unsigned int dma_mode;
52 struct scatterlist *sg;
53 unsigned int sgbc;
54 unsigned int sgcount;
55 unsigned int resbytes;
56 int dma_num;
57};
58
59extern struct imx_dma_channel imx_dma_channels[IMX_DMA_CHANNELS];
60
61#define IMX_DMA_ERR_BURST 1
62#define IMX_DMA_ERR_REQUEST 2
63#define IMX_DMA_ERR_TRANSFER 4
64#define IMX_DMA_ERR_BUFFER 8
65
66/* The type to distinguish channel numbers parameter from ordinal int type */
67typedef int imx_dmach_t;
68
69#define DMA_MODE_READ 0
70#define DMA_MODE_WRITE 1
71#define DMA_MODE_MASK 1
72
73int
74imx_dma_setup_single(imx_dmach_t dma_ch, dma_addr_t dma_address,
75 unsigned int dma_length, unsigned int dev_addr, unsigned int dmamode);
76
77int
78imx_dma_setup_sg(imx_dmach_t dma_ch,
79 struct scatterlist *sg, unsigned int sgcount, unsigned int dma_length,
80 unsigned int dev_addr, unsigned int dmamode);
81
82int
83imx_dma_setup_handlers(imx_dmach_t dma_ch,
84 void (*irq_handler) (int, void *),
85 void (*err_handler) (int, void *, int), void *data);
86
87void imx_dma_enable(imx_dmach_t dma_ch);
88
89void imx_dma_disable(imx_dmach_t dma_ch);
90
91int imx_dma_request(imx_dmach_t dma_ch, const char *name);
92
93void imx_dma_free(imx_dmach_t dma_ch);
94
95imx_dmach_t imx_dma_request_by_prio(const char *name, imx_dma_prio prio);
96
97
98#endif /* _ASM_ARCH_IMX_DMA_H */