OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   0 m: s: ~0 d( n" U- c0 p6 Y
5. * brief  EDMA3 Test Application
   % m6 v3 |3 B' l0 m- E
6. *
   & f0 i4 J6 g2 J7 U& x8 i
7. *   This file contains EDMA3 Test code.
   
8. *
   ! X0 ^$ G0 y/ i" J  R9 F) y0 R& F; [
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   0 O1 f) C4 K2 X3 X" R) W5 J: |
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    : J0 P  e4 k* Z& a4 l
12. *
    8 B) U: l4 _) w; m
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    + M' l; c- ]2 Y2 G. r6 {  N* G4 l
14. *
    % K9 Y5 e3 p' O4 Y. F; A
15. * This program is free software; you can redistribute it and/or
    - {' j# B+ o9 W( i
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    : Y; U3 f0 U0 `
27. #include <linux/errno.h>
    - j1 R: Q- _( Y4 g- N- @4 T0 g
28. #include <linux/types.h>
    2 G, O) I; F! u) G5 b! b
29. #include <linux/interrupt.h>
      @0 x! t" T1 ~( U, A5 l+ X3 ?' P
30. #include <asm/io.h>
    : G- i( J2 b; N5 K9 e6 ^
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    8 c6 v  O3 a: H& j- b
40. 
    
41. #undef EDMA3_DEBUG
    4 o: j7 l, T) @* G1 R( t
42. /*#define EDMA3_DEBUG*/
    5 @6 _3 w: \4 C/ [
43. 
    $ E: b2 ], p- W: |% F- O2 l: d  [
44. #ifdef EDMA3_DEBUG
    / W' Y* n+ M4 A; M" E% [
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    . w/ d. P$ O/ f, l( r
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    " j6 w6 m- S5 B" v+ D0 v
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    ; g- w6 ^! }% P& N2 a5 x2 e
48. #else
    
49. #define DMA_PRINTK( x... )
    7 d9 N5 b3 u: \- s1 ]) L  h+ L3 `) F
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    * c- x( y* {  z7 h( ^
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    5 s7 H% C4 H# M! \
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    6 F! C( ]( ]; F: e- X
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    & O) a* ^' c7 M2 P1 u) S# {
60. 
    
61. static volatile int irqraised1 = 0;
      B3 Y% h1 }- c
62. static volatile int irqraised2 = 0;
    3 l7 ~. n$ o: |! x7 ~: y4 y
63. 
    4 \7 P6 \3 a- o% L6 c0 H- S6 a" v
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    3 T  N! v8 T9 J# m
67. 
    + H* Q7 Y$ K9 p% [; o& d2 N
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    ) r" S6 t; e3 {9 ~
70. dma_addr_t dmaphysdest1 = 0;
    ( ?5 E" w+ s. l" h5 J
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
      A5 R9 F. s1 D3 V% [$ q; p
74. char *dmabufsrc2 = NULL;
      W: b- n! Y1 N( B, P
75. char *dmabufdest1 = NULL;
    5 B! l0 |6 {9 X+ y
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    $ {9 @1 t9 A+ n9 [2 o3 c% h
79. static int bcnt = 8;
    * {! R& n( W$ q# c
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    3 T# E/ i2 U6 e8 F& }  I" s: \
83. module_param(bcnt, int, S_IRUGO);
    5 t7 y. S1 K+ j3 v" C
84. module_param(ccnt, int, S_IRUGO);

复制代码

. z: {9 |# G. G$ `( Q      这是在TI上找到的一个针对Davanci处理器简单的EDMA3驱动程序测试例程的一部分，我在编译的过程中是用
arm-none-linux-gnueabi-gcc  -I /home/tl/omapl138/linux-3.3/arch/arm/include -I /home/tl/omapl138/linux-3.3/include  EDMA3test.cpp -o EDMA3这个命令来链接库文件进行编译，但是报的错误特别多，我又试着一个函数一个函数往进加，仍然是很多错误。
5 Z; w; T8 r7 x& o     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
1 x- `% v8 D* a5 u& Q0 r' b2 ^

- i, s& y. [- ?* @4 }8 y