OMAPL138如何在Linux下使用EDMA3驱动

yyj

# G: w( K* [( f

1. [code]EDMA sample test application
   $ [% C0 a/ c; j$ @' @/ _
2. /*
   
3. * edma_test.c
   + `9 |" E  c! x" [
4. *
   ' @) y- ?$ A) E7 U3 i
5. * brief  EDMA3 Test Application
   0 O( ]* ~9 F/ `& q5 [
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   $ e/ q. E: `9 N; q8 `- T
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ; g- h( v0 z) c8 Y3 ?* m
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    9 x3 D0 u. J. M+ L1 B6 _4 E& b
11. *         TO CHANGE.
    * e+ H. i8 M& }: G
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
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
    : s2 F; R" P; R8 ~1 N" x4 L6 {+ N
17. * published by the Free Software Foundation version 2.
    
18. *
    ; f, n$ u& u( W2 Q# r$ d
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. 
    2 G: ^, J0 \9 n, r. `' {9 ^9 x* A. H
25. #include <linux/module.h>
    8 f3 X" ?5 s+ g7 }
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
      a4 C8 D+ u/ n) w7 ]
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    8 W  \  O7 b0 @' u
31. #include <linux/moduleparam.h>
    0 `1 G0 _4 @' _
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    & f% a% {1 D( }5 x/ i
35. 
    
36. #include <mach/memory.h>
    # H- V6 U# m- F  ]/ k& y, G
37. #include <mach/hardware.h>
    2 x' w' R+ Q! x4 {" E
38. #include <mach/irqs.h>
    7 \  J' z5 Q, w. J- v+ I
39. #include <asm/hardware/edma.h>
    
40. 
    ; Z" \- P. J9 u' ^
41. #undef EDMA3_DEBUG
    / x, x# _1 J5 W8 O) u
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    # [& V$ L3 p/ ]9 ~5 F1 t& h
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    ; R' `$ i& f: F
48. #else
    / n. n* H& l5 P4 u9 l8 Y, U5 B
49. #define DMA_PRINTK( x... )
    ! X6 K& V. S# J4 ]8 x4 N
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    % M) X! L% \, ~1 c5 e
53. 
    * ~/ f/ K' g; n( L1 M' v' F
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    ! Y3 y  e/ g' n$ P4 p  T0 b
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    6 m9 B3 x" C( v3 p! z( D: h7 M" q7 L4 u: p
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    * H- C; V; I$ z8 T) M" C, c% u
62. static volatile int irqraised2 = 0;
    ( B4 _. u# j( m- y4 K" h5 Y  G/ z
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    " U' s( V! ^& M# G2 V
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);
    
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    1 N5 O! `  g9 y
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    : T, B) d% `: J
76. char *dmabufdest2 = NULL;
    + D7 ~* ~- \+ |. I* Q' x- s
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    ( Q6 N* n( l2 }; h) V
80. static int ccnt = 8;
    
81. 
    2 M8 h$ L3 R  ~5 Z, O
82. module_param(acnt, int, S_IRUGO);
    0 P, ]! q4 z2 G. V+ l8 h$ i
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

2 M; B6 [( g) I6 W( x$ u      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
/ G& |  |6 K6 Q/ b% Karm-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。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
- X" z) M$ ~2 t5 k4 e5 |4 C
1 i. e/ \7 f2 m: q