aboutsummaryrefslogtreecommitdiffstats
path: root/include/asm-arm/arch-imx
diff options
context:
space:
mode:
Diffstat (limited to 'include/asm-arm/arch-imx')
-rw-r--r--include/asm-arm/arch-imx/dma.h17
-rw-r--r--include/asm-arm/arch-imx/imx-dma.h90
2 files changed, 93 insertions, 14 deletions
diff --git a/include/asm-arm/arch-imx/dma.h b/include/asm-arm/arch-imx/dma.h
index b45fa367d71e..621ff2c730f2 100644
--- a/include/asm-arm/arch-imx/dma.h
+++ b/include/asm-arm/arch-imx/dma.h
@@ -17,27 +17,16 @@
17 * along with this program; if not, write to the Free Software 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 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */ 19 */
20
20#ifndef __ASM_ARCH_DMA_H 21#ifndef __ASM_ARCH_DMA_H
21#define __ASM_ARCH_DMA_H 22#define __ASM_ARCH_DMA_H
22 23
23/*
24 * DMA registration
25 */
26
27typedef enum { 24typedef enum {
28 DMA_PRIO_HIGH = 0, 25 DMA_PRIO_HIGH = 0,
29 DMA_PRIO_MEDIUM = 3, 26 DMA_PRIO_MEDIUM = 1,
30 DMA_PRIO_LOW = 6 27 DMA_PRIO_LOW = 2
31} imx_dma_prio; 28} imx_dma_prio;
32 29
33int imx_request_dma(char *name, imx_dma_prio prio,
34 void (*irq_handler) (int, void *, struct pt_regs *),
35 void (*err_handler) (int, void *, struct pt_regs *),
36 void *data);
37
38void imx_free_dma(int dma_ch);
39
40
41#define DMA_REQ_UART3_T 2 30#define DMA_REQ_UART3_T 2
42#define DMA_REQ_UART3_R 3 31#define DMA_REQ_UART3_R 3
43#define DMA_REQ_SSI2_T 4 32#define DMA_REQ_SSI2_T 4
diff --git a/include/asm-arm/arch-imx/imx-dma.h b/include/asm-arm/arch-imx/imx-dma.h
new file mode 100644
index 000000000000..f2063c1d610d
--- /dev/null
+++ b/include/asm-arm/arch-imx/imx-dma.h
@@ -0,0 +1,90 @@
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 <asm/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 *, struct pt_regs *);
49 void (*err_handler) (int, void *, struct pt_regs *);
50 void *data;
51 dmamode_t 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
62/* The type to distinguish channel numbers parameter from ordinal int type */
63typedef int imx_dmach_t;
64
65int
66imx_dma_setup_single(imx_dmach_t dma_ch, dma_addr_t dma_address,
67 unsigned int dma_length, unsigned int dev_addr, dmamode_t dmamode);
68
69int
70imx_dma_setup_sg(imx_dmach_t dma_ch,
71 struct scatterlist *sg, unsigned int sgcount, unsigned int dma_length,
72 unsigned int dev_addr, dmamode_t dmamode);
73
74int
75imx_dma_setup_handlers(imx_dmach_t dma_ch,
76 void (*irq_handler) (int, void *, struct pt_regs *),
77 void (*err_handler) (int, void *, struct pt_regs *), void *data);
78
79void imx_dma_enable(imx_dmach_t dma_ch);
80
81void imx_dma_disable(imx_dmach_t dma_ch);
82
83int imx_dma_request(imx_dmach_t dma_ch, const char *name);
84
85void imx_dma_free(imx_dmach_t dma_ch);
86
87int imx_dma_request_by_prio(imx_dmach_t *pdma_ch, const char *name, imx_dma_prio prio);
88
89
90#endif /* _ASM_ARCH_IMX_DMA_H */