OMAPL138如何在Linux下使用EDMA3驱动

yyj

$ k% V& W7 H/ \

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   9 u$ ]% N' T  i& x7 I
4. *
   ) S4 D  W) U1 ]5 ~8 C
5. * brief  EDMA3 Test Application
   
6. *
   - f: `; p9 y! C' E
7. *   This file contains EDMA3 Test code.
   - T0 W+ g* a2 G. v1 ^
8. *
   % \4 }$ n+ `- h* {' y$ R3 y* g
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ) S5 n. {  E) w; E
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    ) J* `7 K2 A" Z. C# f0 g# b
11. *         TO CHANGE.
    4 p1 R% F5 b" x, o- ~
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    % `# z# Y5 M" c1 @! `7 r
14. *
    5 G, z/ }& \& \! @7 G+ @4 W
15. * This program is free software; you can redistribute it and/or
      ~  h' \; u$ J' O; b- _7 |5 H
16. * modify it under the terms of the GNU General Public License as
    " P2 h) W$ X9 D* I7 E+ c( S$ _
17. * published by the Free Software Foundation version 2.
    7 p7 h0 B! }& A3 {4 f1 W
18. *
    2 Z0 y- ?+ \# n/ n
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    2 f( v( ]3 w5 \" B5 Z' U
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    4 \, s' y1 v# ?$ P- r' V
23. */
    
24. 
    
25. #include <linux/module.h>
    + _3 A6 P6 M2 A" C! D
26. #include <linux/init.h>
    % I4 d1 y3 y0 g0 W! N  n
27. #include <linux/errno.h>
    ! E+ q. t& l" p$ ~: T, D! n" a
28. #include <linux/types.h>
    ) [$ u; R# K  u  y4 y
29. #include <linux/interrupt.h>
    ! o3 W9 B! e0 V: ?/ ]
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    ) N5 i  U, D, e, i- D
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    + O  k3 P8 z: b
35. 
    . ^5 S7 `1 G* f
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    ' r. n- }+ g& J
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    ; V. [; v- e, n' {- N
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    8 z- n1 R$ B9 f' C4 S
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    * p2 e9 H* f( k$ G8 |
48. #else
    4 F* H) E% j7 v9 G2 [* I
49. #define DMA_PRINTK( x... )
    5 M# T6 ^. P9 s: {' l: r4 Q7 r# X$ F
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    2 y) E( l% f' F: z/ o/ g( t1 x
53. 
    # H3 M9 s7 A7 n8 k& X  r$ p
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    3 K# @+ B5 C& ]* H# b) q
55. #define STATIC_SHIFT                3
    , v+ h! I( P7 [3 C* H2 s
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    " ~- c1 }4 j$ I1 F2 S# B2 t
59. #define ITCCHEN_SHIFT               23
      T9 Q9 i( S; d8 o; ?8 \; W
60. 
    ; m! {! b8 g2 w; h: c
61. static volatile int irqraised1 = 0;
    ) q' }% M, D( t+ H3 ^6 G+ Y; s3 S; @
62. static volatile int irqraised2 = 0;
    
63. 
    8 K) N( r, I$ c* `
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ' @( L) _' }- m' h7 i
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    # T9 \: Y* Z" H  x# A. j
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    + [3 i+ m; ?- t, x
70. dma_addr_t dmaphysdest1 = 0;
      H' @1 ~9 q' e2 N, H: w
71. dma_addr_t dmaphysdest2 = 0;
    * l3 L9 R' f2 f6 F8 D
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    9 O9 m" q3 a  r( [% e. I8 Q
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    ; S8 s8 |7 W7 ]  ?' O8 R
81. 
    # y% \$ J, P; k1 e
82. module_param(acnt, int, S_IRUGO);
    8 r, d' G3 q( O4 l/ t
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

+ n, H7 o5 {# H2 F, c' S5 Y' v2 `2 [7 W
8 A% {6 n; \* }: j0 O      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
$ G! m( O- Q5 I: 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。
( j+ J$ r/ @" ~% T0 l9 S; ^3 E     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。


% Y' e7 M8 P/ @- u. ^/ T/ W