OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   3 c6 u6 J. v- P" M3 z, i. f
2. /*
   
3. * edma_test.c
   ' R* z# E( t# V5 k' L' |# @
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   * T* Q6 p1 R9 }- i9 L
7. *   This file contains EDMA3 Test code.
   " b) ^) S- f( \4 V$ p; f
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.
    
12. *
    / N3 u0 U! X% n' p7 _: Q1 l4 S9 N
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    / p' n! ?: D7 _5 T
15. * This program is free software; you can redistribute it and/or
    ; R: E! O/ r/ A6 p: A# b6 W9 q
16. * modify it under the terms of the GNU General Public License as
    " ]8 y3 B  }9 E  ^3 {
17. * published by the Free Software Foundation version 2.
    
18. *
    / Z1 v  N! G3 r' G) D# i0 @
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    . t2 w. a# [% h+ q5 `/ L3 U: ]
22. * GNU General Public License for more details.
    
23. */
    4 ?! e* T! f! C) |* z
24. 
    - Y, Z, q/ k! o0 p9 S( k1 @; v0 e
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    ( S& r2 N3 n' ^8 x* Z  w
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    . o. c( ?  n8 F. t
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    " W+ y7 t. }5 \+ a
31. #include <linux/moduleparam.h>
    9 L7 ~. P- a2 r9 Q6 V0 H
32. #include <linux/sysctl.h>
    $ c6 v# ]$ ^9 k4 B
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. 
    / h% \9 Y" ~# r5 ~0 m9 W/ m) b* ~
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    7 X6 H/ o0 N7 _! _
43. 
    1 }. z8 t3 f* Q/ ~: T4 [
44. #ifdef EDMA3_DEBUG
    ( G' T, U9 o( j/ L. O
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    / v. a5 ^& d2 R! Z/ _. V# n
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    & P7 w! w2 F/ n- D$ ?2 o
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    # `0 i' o$ \4 n* x+ @" w4 e  o
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    6 }1 D/ @2 V- d2 E
51. #define DMA_FN_OUT
    * [3 e3 @# i/ i) t, S
52. #endif
    
53. 
    % W4 i) K4 _8 s# d- q6 k( D
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    5 p! D$ q" E$ N) P
56. #define TCINTEN_SHIFT               20
    ( r% \6 H$ r2 K0 s; H( E
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    & `* G  d: D1 u0 P! _7 b, D( b" a# M# T
62. static volatile int irqraised2 = 0;
    ! x- a# q1 F& R1 G4 }
63. 
    ! S: k  }; S, f2 ^
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);
    
67. 
    " h4 w$ g' \6 E" z& P$ K$ d0 v
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    $ B5 r* f, l. k0 m# }! j& l
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    & l7 Z- j& L3 p; B* A3 p  N9 w3 j
72. 
    1 D5 Z$ }, e3 _) F
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    , d5 A- j/ |. ]/ F- _& U3 L6 P
76. char *dmabufdest2 = NULL;
      O  s: l" T  v: T
77. 
    9 A! s( O) C) f
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
      O& {  N2 w. c& `
81. 
    
82. module_param(acnt, int, S_IRUGO);
    : s5 n0 j* M* W& `
83. module_param(bcnt, int, S_IRUGO);
    2 q3 }$ H& n; k: U) `$ ?# r
84. module_param(ccnt, int, S_IRUGO);

复制代码

# i& a- I" u9 n9 q; a
- g3 |& B) p# X$ |/ |: h' U) d      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
1 p( j1 ]: N" O2 n+ D/ barm-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。
1 C0 q9 ^1 v, Z: c     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

) c+ f, G( L5 i6 _' \% j