OMAPL138如何在Linux下使用EDMA3驱动

yyj

+ s3 M8 Q9 @4 a% A0 ~

1. [code]EDMA sample test application
   
2. /*
   * y- _2 o0 q7 H- M
3. * edma_test.c
   
4. *
   ( B2 g: z5 U7 q
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   , @1 i& p6 B6 ]1 A$ w+ ?' q
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   5 h0 W; @8 w/ r! z! V% q
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    * f$ Q1 r9 O4 W" z1 p
11. *         TO CHANGE.
    + M/ m; K% }: s- r. I9 b0 R
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
    
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    . D/ j7 H  U8 V$ j- ^7 |7 H
20. * kind, whether express or implied; without even the implied warranty
    & W9 w+ V/ q8 R6 k3 k
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    7 j! ?4 U% V0 @" H  ^, A" H" D* O' l
22. * GNU General Public License for more details.
    
23. */
    + e  j( z7 a& L# N' m  O0 N
24. 
    
25. #include <linux/module.h>
    3 e( |: n& l6 m3 V! v3 b5 H4 c/ x
26. #include <linux/init.h>
      c! j' y' y! Q
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    3 P. V# j2 o: V; s; L
29. #include <linux/interrupt.h>
    4 ]6 Z5 r0 I- K  c
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    6 Y; q, i: A- }% m+ D+ }. b
33. #include <linux/mm.h>
    # I7 s1 |, F+ y
34. #include <linux/dma-mapping.h>
    9 @9 ^) ~  x" j
35. 
    
36. #include <mach/memory.h>
    6 B' R8 T: N7 O& Z  R: z
37. #include <mach/hardware.h>
    1 L: m0 s$ e! g& H6 ]" g
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    5 _' S' E* k0 @  H, w6 F* L* s( X3 a
41. #undef EDMA3_DEBUG
    % M; a# I& s) A9 h& K) k# h: \
42. /*#define EDMA3_DEBUG*/
    ; H5 ^' [+ G, D3 ~8 j" l
43. 
    ( G' r0 j& e- T9 M
44. #ifdef EDMA3_DEBUG
    . H: t- |3 X* \3 ^5 I! g4 h$ b
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    * \3 {) j; T$ D, Z2 ^
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    ; E+ X9 B* p$ f+ k3 D
48. #else
    ! b+ c% m* {  ^. y7 ]% C. s
49. #define DMA_PRINTK( x... )
    4 k0 u# ^* ^- e# h
50. #define DMA_FN_IN
    6 C2 U2 p# g5 N4 w, D6 c' V
51. #define DMA_FN_OUT
      }! `2 L5 {) z: X' ^5 C
52. #endif
    . \& \' E4 N7 K" \
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    3 Z# x+ |6 L0 o4 q
56. #define TCINTEN_SHIFT               20
    6 t+ L2 h" Z% p
57. #define ITCINTEN_SHIFT              21
    * m( t. ~1 C; `. |
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    - j9 T' ?* G; D! T- ^. f/ P
61. static volatile int irqraised1 = 0;
    - B" Y) L: _* u5 c- ~& Q! @! i
62. static volatile int irqraised2 = 0;
    
63. 
    # G& P: S& [' V# p& p) \1 n% ~
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    $ N2 N6 x+ {) E5 d/ A4 C& T+ h
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    1 [& L, l  N! O: ^, B
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    6 Q& {  b! t& p& _; C. T6 c+ N6 r
67. 
    * M! ^6 e( {0 S+ u, Y' H( n
68. dma_addr_t dmaphyssrc1 = 0;
    7 O9 L( J5 w: I) N
69. dma_addr_t dmaphyssrc2 = 0;
    ; B  |  a. Q! N6 X
70. dma_addr_t dmaphysdest1 = 0;
    $ J" Z: Z: Q+ r" e8 F
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    7 q8 S8 {1 K2 [5 e) n2 L6 \
76. char *dmabufdest2 = NULL;
    : E: U# r! y! n4 q, U! q( Z
77. 
    % {+ v8 \" k# z" x# B6 M/ P9 m
78. static int acnt = 512;
    ! E0 ?! N8 |9 E4 Q6 `
79. static int bcnt = 8;
    - a+ m9 t. W; l1 M' N  k  d) R2 B3 S
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

: r0 }6 z' I% T2 J# Y" 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。
  F6 t. v+ A0 I, |3 i     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

9 b9 r$ r4 {4 X
' l$ B2 m; M3 h) }2 F