OMAPL138如何在Linux下使用EDMA3驱动

yyj

$ P" K6 }7 b: S! o& f

1. [code]EDMA sample test application
   
2. /*
   % f8 y4 X# u( n5 y+ o
3. * edma_test.c
   
4. *
   & R" O7 b5 L) N3 _7 ?& P) d# V
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   ' T; q( ~* l1 S8 Q
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   , K# e  a1 B0 K0 |) u
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/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    ) a& b" X6 A) w) B
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    1 I  r: m5 J; q' \7 i5 ?5 a) x
18. *
    9 m; E; s* t9 g; x! G( ~
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ; H" B: H7 r9 ~2 h/ o: R0 S; J+ @) Y
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. */
    9 F! _9 K/ v( Z
24. 
    
25. #include <linux/module.h>
    8 m6 h4 u5 c% M8 \" U: S4 B
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    " w2 b7 ?& p, K% e  P; z9 Y
28. #include <linux/types.h>
    4 }' G. H# n3 W6 N# e/ E
29. #include <linux/interrupt.h>
    * J$ S( q) y# c7 U  L
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    * ?; S9 ?: J' J  n, Z. Q
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    ! O  C0 t6 t7 T; S) _! b
43. 
    3 K" i# |0 r6 X0 x. w
44. #ifdef EDMA3_DEBUG
    7 z1 A7 M7 S! V1 `! M1 n& f
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ' i8 N; l' B# h; c, h) B$ r
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    3 s1 p+ @; m$ s9 L/ y! M
48. #else
    ( E2 B1 E) x& w& g- [% w
49. #define DMA_PRINTK( x... )
    # J& C) ?& E7 \3 Y
50. #define DMA_FN_IN
    ! Z/ j* o$ R2 R7 o/ u- L
51. #define DMA_FN_OUT
    2 p1 r; e9 r" M& n5 h2 _
52. #endif
    9 R; q8 R4 O4 t  F- ?) ?) G" {
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    7 u, ~; M- n- Z1 t( F
55. #define STATIC_SHIFT                3
    2 M) I- N; Q; s9 m. W: d
56. #define TCINTEN_SHIFT               20
    & M! u6 f+ i; i/ e) z1 V$ Q
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    ; T" o, v" X' n- Y7 r4 F
60. 
    
61. static volatile int irqraised1 = 0;
    3 z: W0 K; {2 [8 L5 \8 P; \
62. static volatile int irqraised2 = 0;
    
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);
    , d6 R( ?3 a# r3 Q( C) ]0 |
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    % V0 _& h$ v+ U; {* o
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    ) z) @+ r7 P* c& e1 e
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    - B6 w8 U3 l$ P
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    + T, D! ~) f( Y
80. static int ccnt = 8;
    
81. 
    9 s, A* C: M; [/ r
82. module_param(acnt, int, S_IRUGO);
    9 _. F! ]; Z3 p6 f; b
83. module_param(bcnt, int, S_IRUGO);
    / V1 L/ ~* A+ m: w0 k% r
84. module_param(ccnt, int, S_IRUGO);

复制代码

  @+ w6 V6 [- T) G! J8 k
6 z/ z/ i# G$ d% M$ }* |      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
  w. O" t5 m5 L; O" l5 {# E. Garm-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。
( P: ?  i4 F1 b6 r) S
0 ]! I; A( f6 J, h8 o/ c9 V( `
$ b6 M) i3 r, r/ X) A) W& M