OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   8 f2 Q# n+ K0 a1 M: j2 t0 G
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   % L# r4 q5 ]- {: k- ?. i7 s/ C# Y
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   , `8 u! M5 J3 w7 r( {* K1 r
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   & @/ b# }% m; s) M) R
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    + S5 A- u6 r3 A. H
14. *
    1 ]4 \$ R9 b5 t7 F' l5 i1 L
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
    # u& v' Y" B- B) W1 o
20. * kind, whether express or implied; without even the implied warranty
    . ~5 l: E* m$ F% C# W1 `% Z
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    , \% @: L) u5 y# A2 p
23. */
    # P6 T$ A: v( h$ B8 I$ F
24. 
    6 ~! k( X  M: k4 _: c1 _7 i
25. #include <linux/module.h>
    % f6 K6 s1 k3 ]. o; e
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    8 m9 r8 a8 b! S: J6 X
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
      u9 w! x) m% P, [# Y6 q
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    ! g+ P$ D) x" A. u: l) c8 y
41. #undef EDMA3_DEBUG
    & M( o+ s$ M9 U3 g7 C4 x  e
42. /*#define EDMA3_DEBUG*/
    6 {: P$ B8 u* m* j0 D
43. 
    9 i; G1 A! c* @3 {. ?1 ]
44. #ifdef EDMA3_DEBUG
    2 F, Y+ A/ r- h$ K* g
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ! Z2 [8 y! |3 i. Y
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    / g% Y' l/ Q3 h: v/ F. k9 o. e9 g
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
      T' d4 P3 a% U8 O: j
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    & U7 n. [0 S9 M6 M6 X" r# E# y6 j
51. #define DMA_FN_OUT
    . r9 r+ F9 |$ Z  h% v
52. #endif
    
53. 
    % W/ @& V+ Y3 v  o( A
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    % ^5 J! i; w  z1 F9 r# E. O
55. #define STATIC_SHIFT                3
    . N2 E1 s+ B# q9 ^+ \: O( w
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    ! Q. e% u! t8 `
58. #define TCCHEN_SHIFT                22
    5 }$ C( z: ?6 c: l( t! s. a
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    , A3 k0 T. _; ?" I# y/ n/ u/ y
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);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    , e  r0 O8 M% D/ K9 L' O
67. 
    ) I- A. m, l# w
68. dma_addr_t dmaphyssrc1 = 0;
    , v. _: {- L" ~, y: ~
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    3 v; L; _/ G, {' S, Z5 ^% o% T1 q
74. char *dmabufsrc2 = NULL;
    + j. t$ t: k5 c, Q
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    ; Y6 s1 u7 C% N* s, \
77. 
    
78. static int acnt = 512;
    5 Y5 [( O* r+ i! K% }; _6 R
79. static int bcnt = 8;
      E% H8 `4 c8 k2 V# p
80. static int ccnt = 8;
    + `- @2 X. M2 F1 d# G, N; c
81. 
    
82. module_param(acnt, int, S_IRUGO);
    . x4 B& g+ g8 d, k3 l/ {
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

7 Z/ I# A, A& L; ]+ z! p      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。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
0 q9 r* G& ^5 I6 o2 x2 P( J3 \. \: Z