OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   ( \2 V! x8 N3 ]) B2 a: M. N" Z3 ?+ e
2. /*
   ' T6 Q# U7 I7 ^8 G* i7 q: `6 R
3. * edma_test.c
   
4. *
   ( P, q0 ~; V# t$ ~1 ^
5. * brief  EDMA3 Test Application
   
6. *
   # F4 z- I! t" {$ g1 @
7. *   This file contains EDMA3 Test code.
   / V* g, X7 K4 k' }  L$ p  E
8. *
   9 F; F; |2 b, l
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ( ~9 ^; M! s# x" b
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    $ T( x* ?5 v- d4 |' d
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ) l$ F4 b) m' F  b( Z& l
14. *
    - g! A$ o2 r: e# I- l+ M8 k6 O
15. * This program is free software; you can redistribute it and/or
    
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    ! R& F: J, U# Y1 z
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.
    & `6 G9 h9 S3 M4 q
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    2 R; W. ~' A$ K/ D% q0 y
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    - B' p9 _+ [8 v0 x/ p
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    . l! h7 K- b- ?, k# w
34. #include <linux/dma-mapping.h>
    ! K) N5 x3 K# K0 D  u
35. 
    # g1 R; h& U7 ]0 b: z- l
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    0 A8 {3 t, V- @  p5 j
38. #include <mach/irqs.h>
    / p; B+ ~# m0 A, B1 e* g' K& T7 r
39. #include <asm/hardware/edma.h>
    ' h1 {' t0 A2 e! H6 J8 J
40. 
    
41. #undef EDMA3_DEBUG
    # D. K& o; ?, i  J& q# K
42. /*#define EDMA3_DEBUG*/
    & x* M, T5 D1 Q# {* s! m' g
43. 
    ; `& {% C7 s5 A6 f8 }% w* v# G
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    , l6 J9 V! W/ s6 [. C
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    ( V0 x3 q9 b0 K* ?
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    ' m' _+ E: N0 i' w! C" k
50. #define DMA_FN_IN
    : g! o' P1 m/ q9 c6 i
51. #define DMA_FN_OUT
    
52. #endif
      n( d3 W" {) l  b' _% P0 G8 j
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    7 `' w2 f8 S3 a
56. #define TCINTEN_SHIFT               20
    % y6 ^3 @  Q( V3 ^' h
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    9 U1 w! r5 ?+ S
60. 
    ! V' V4 Y- d( ^# W7 g4 J) ~
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    
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);
    ( ]+ T; W2 _7 C
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    # i- N% F  ?. U' I  Q
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    & o7 Z& l0 f) z3 Z- D; q5 m
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    7 `1 ~: ]: g# c2 J. }' K* _% \
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    ( N; J9 q& S3 @6 n5 Q# l
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    . |; K+ U* r9 g, X
82. module_param(acnt, int, S_IRUGO);
    ' s9 H0 j% ~5 w6 m- O4 L) Z' \
83. module_param(bcnt, int, S_IRUGO);
    1 e- `9 J" y; A1 }( M8 d! g
84. module_param(ccnt, int, S_IRUGO);

复制代码

+ I$ G3 w/ c: |! `3 a4 {
$ s/ ^  m8 _& E; 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。
  s  H5 I5 g0 W4 w# A- y% 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。
4 |8 C! |* H4 h

& L' z/ p2 e1 @% a