OMAPL138如何在Linux下使用EDMA3驱动

yyj

0 p) s: U0 m6 Z: }* \6 |* ?) l

1. [code]EDMA sample test application
   4 `6 V& p% z+ a- B3 r* w
2. /*
   
3. * edma_test.c
   5 \, v4 f/ g4 K. v
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
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
    
11. *         TO CHANGE.
    
12. *
    0 ]5 J, `6 h( i2 C8 j+ J" S$ A2 l
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    - m( d; H) {+ J! f7 N. J2 j5 D, s
14. *
    
15. * This program is free software; you can redistribute it and/or
    * d/ g4 c9 ?& `! D5 @. d
16. * modify it under the terms of the GNU General Public License as
    . [3 D! q: a, {) `. e
17. * published by the Free Software Foundation version 2.
    
18. *
    9 c' y9 e0 i$ C8 N
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    1 H: R( N* E9 y8 O: d7 n
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    7 B9 E) A1 A+ B; }9 F) Q% I% t
22. * GNU General Public License for more details.
    ( D5 ^. Q- v, q1 R2 v
23. */
    
24. 
    6 H1 D/ _& ^! n( O2 \6 v; W3 N; r
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    + D& k$ a: c2 o7 o
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    2 s' ]4 r! R7 N
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    : \: L/ N- S- o0 l5 h" ~3 r8 Z" X( ]
36. #include <mach/memory.h>
    7 x% L" F) x5 M% d" }
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    % ?5 }8 d4 h% n* t$ |/ B
39. #include <asm/hardware/edma.h>
    
40. 
    2 c# R# W8 x# r3 o, |& k
41. #undef EDMA3_DEBUG
    / b2 E, b# a; x2 g7 ~
42. /*#define EDMA3_DEBUG*/
    
43. 
    # _( W% p* N7 @, S% `' L; @
44. #ifdef EDMA3_DEBUG
    : h, N( \& M# v2 P, h% V1 w! [1 ~
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    & T$ f( F% D9 w7 z1 r
48. #else
    & W( L- X6 |0 ^
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    ! _" z, _- G( ?- E& o6 j
51. #define DMA_FN_OUT
    6 w4 n( f1 `5 z4 I1 g
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    0 }. o1 q+ B# B- B5 r' Z
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    9 D. b7 X+ c) {, q7 b
60. 
    8 Z0 Q. l2 F) H$ V
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    1 F$ y. `( @2 A- D0 e' i! \" U
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    7 D4 A! k$ K1 [% \) R# P5 B
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    8 h  b( N% b# Y& }: c& g
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    5 y6 e( k% S, p& }
67. 
    2 ]% `( ?6 S# p# g
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    3 T- f5 H8 A, i$ q" }
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
      w* n$ O' Q+ o
74. char *dmabufsrc2 = NULL;
    1 ~1 i5 v% \/ O3 i! _- J- P
75. char *dmabufdest1 = NULL;
    # W6 c( I) c; {
76. char *dmabufdest2 = NULL;
    
77. 
    ) s! x% }/ R. R
78. static int acnt = 512;
    5 N/ h6 t0 g$ l1 H# G+ I
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

& r6 I8 R8 [* B& n
      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。
3 u$ v% H3 Y, d! t" `

' V, q( O& n, p