OMAPL138如何在Linux下使用EDMA3驱动

yyj

  g) O; N2 H, T5 a% e# m

1. [code]EDMA sample test application
   
2. /*
   ) g- \" I" ?+ T* ~# t- P1 r
3. * edma_test.c
   ; V3 f  i6 P- {  S0 ~( f, D
4. *
   : L) s# K  N5 h/ N% G) ~* b+ d1 q
5. * brief  EDMA3 Test Application
   9 q" Y) r" \; D& K3 e
6. *
   
7. *   This file contains EDMA3 Test code.
   : D. R4 Z6 W( i, a
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    - U4 B2 m5 F: H$ ~  {  g
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    , ?. c6 t5 n1 v) @
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.
    , u# N2 K" ?7 s) w4 A
18. *
    % @1 |# P5 A0 l
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    4 n: d2 T+ p" d0 z8 l: D
20. * kind, whether express or implied; without even the implied warranty
    9 v+ b9 k: Z# ?: F9 W3 n
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    - s+ P/ a" U3 P( N  S4 @
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    + }4 I5 M! i* \/ f9 I3 I
27. #include <linux/errno.h>
      a1 V# i6 v/ \& F! T8 U& K. F3 q
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    0 H# ~& ]4 |2 t) B% ?* j. n  s
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    6 _; W* `: [: B  K1 i1 f; e
36. #include <mach/memory.h>
    7 L* p4 l9 }0 p! [. `
37. #include <mach/hardware.h>
    ) g7 B8 J( V2 S! T  e* t( U+ c
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    . O5 ^) n  ?1 j
44. #ifdef EDMA3_DEBUG
    , w6 `- b# G! M' s" R3 k
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ! i. `3 R/ H* E, ^. @  s3 M
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    - `4 H; B7 `; w; d
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    ( |- s/ e3 A: E# u
51. #define DMA_FN_OUT
    $ |9 @2 l$ H; V; n( n% M
52. #endif
    
53. 
    7 f4 K$ u5 _! o) n* m8 M
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    8 S3 X: ~- s9 w
55. #define STATIC_SHIFT                3
    9 y. _: u: J6 w3 @% B) |$ F
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    1 N; ^* R3 f; u" ]% g! H9 \. G8 b
61. static volatile int irqraised1 = 0;
    ' Z( @( |' {3 T0 L& D( K  L
62. static volatile int irqraised2 = 0;
    ) v; Z3 j& m, t0 |, P
63. 
    : e+ n! r" |7 j9 l' n5 X
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    3 a0 r$ k0 I! C
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. 
    : g% Z' w, ^, \$ T5 l; T5 t
68. dma_addr_t dmaphyssrc1 = 0;
    ) o6 x: M8 ?0 w% C
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    9 _4 S+ c. [) x
71. dma_addr_t dmaphysdest2 = 0;
    & I2 E, j! K5 m  b0 y: a* c
72. 
    ' P: [0 q, h. c+ U
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    9 K; W7 D5 g6 e, V
77. 
    ' [/ R2 a8 S; R3 _% @" q" N6 M8 r
78. static int acnt = 512;
    
79. static int bcnt = 8;
    7 ^5 [) x! K$ f# M. R
80. static int ccnt = 8;
    ; h" f# F8 e+ J$ W+ x
81. 
    
82. module_param(acnt, int, S_IRUGO);
    9 k3 n2 b+ ^2 j+ T
83. module_param(bcnt, int, S_IRUGO);
    9 p7 a9 O8 k; C/ w
84. module_param(ccnt, int, S_IRUGO);

复制代码

  p8 s% r6 ]4 U; Y, F
      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
. S7 c5 {- D% `  B6 t4 f+ S( k/ t% \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。
     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" D; J& A) c7 x4 M# ]% Q6 y