OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   $ v# t! p- o; j: M! V2 a% H
2. /*
   
3. * edma_test.c
   2 W* O2 F1 }+ ]
4. *
   
5. * brief  EDMA3 Test Application
   8 j8 m1 l) G+ d; ~
6. *
   # v& s; k% a3 O% n
7. *   This file contains EDMA3 Test code.
   
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
    0 }6 I# c0 I% R5 O
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    - m, k. M6 }4 |) \* v& {/ }
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.
    6 b  k( i+ c  U0 |4 M" c+ ^
18. *
    3 j4 v+ M) I, Q. F" X
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ( I# ?  U# q: R5 a$ Q" E% ~
20. * kind, whether express or implied; without even the implied warranty
    5 ]& O* l) ^7 i8 t) K
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    # [7 V: V9 C" Y3 k6 L) J  [
22. * GNU General Public License for more details.
    5 O! L' G  R9 F
23. */
    + t3 p0 a2 Q) B, L; ^4 }2 ~
24. 
    , |+ E. P0 S$ }( S7 i# k6 M+ D5 k
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    " c; j) H9 M- g" n
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    % D; f3 y/ K0 V  T
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    / i/ n: {! q+ f, ?5 o8 q  [
35. 
    ! I( O: ]; l3 p3 K( Q/ m
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    ; F7 X. G5 b3 r; V* X
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    3 p8 y7 }: h# H- I
44. #ifdef EDMA3_DEBUG
    4 L  q: V- u  P
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 y, `- k8 N4 o" `3 V
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    4 _8 B  ?: H) G' g% r
56. #define TCINTEN_SHIFT               20
    - x; h0 U' W/ W0 O
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    * }3 b% x- r4 e, d
60. 
    1 v2 b; Z# R8 D9 D3 e
61. static volatile int irqraised1 = 0;
    . E. A' J2 k8 h- u* Y
62. static volatile int irqraised2 = 0;
    3 s$ O! `9 H0 N+ K
63. 
      w, R9 D: F: \- q
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);
    5 B8 l! q+ z/ a
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    7 Q# J* I8 U2 \/ x7 w: S( N, Z
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    ; r) B4 {* K2 `" Z6 g0 }
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    7 G( i0 ]! o4 ]" {) \9 ^& {
73. char *dmabufsrc1 = NULL;
    & C/ g6 ^' e- `( b8 \7 m. j* h$ ^
74. char *dmabufsrc2 = NULL;
    # n1 B) [5 X; t+ J
75. char *dmabufdest1 = NULL;
    ; y. d# W7 _7 u! n. _, J
76. char *dmabufdest2 = NULL;
      m& ]" t" Z, M$ Y# ]
77. 
    6 b" x# g$ ]6 g* E- n# d; ^
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    2 m2 y& g5 ~6 u/ A8 T
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    1 q+ P0 L2 p% R+ i5 U
84. module_param(ccnt, int, S_IRUGO);

复制代码

& l" m7 _" p: C, I; j5 [% F; 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
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。
& @7 c3 ~* h. T     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
  k8 C2 H3 l: D: Z' M& {

0 d) s- P# B* O; t