OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   + E6 I; W7 U* |. \7 p2 V
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   ; O) A) |! n0 T/ p! `5 s4 ?. z2 y
8. *
   , T0 n  H8 ^1 d
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
    2 ^! g! Q6 }5 }9 P& S: F
11. *         TO CHANGE.
    ' _4 M4 m% e9 f/ b! v( Q) Q+ j3 b
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    * j4 E6 Y& r! t# [5 w' a
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
    * H  u: W. T! v
17. * published by the Free Software Foundation version 2.
    
18. *
    5 r+ l4 s. u% l7 \5 S, }" t
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    * g3 P* O" h* d, X% U% J+ H% B) n2 j6 F
20. * kind, whether express or implied; without even the implied warranty
    ) K3 n, ^2 @; ?: E4 ^& i% C1 `
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    1 f- k  E7 U5 m8 P0 s5 w4 ], y
22. * GNU General Public License for more details.
    
23. */
    2 o5 K' W) k9 L% ]5 f1 b
24. 
    
25. #include <linux/module.h>
    ( @5 `6 F2 V3 L" K  T* P8 E
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    % A' G" q* G+ m& F* @
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    - `" b9 ~/ h  f0 f
33. #include <linux/mm.h>
    3 o8 I; T) E, A( \5 J' [
34. #include <linux/dma-mapping.h>
    
35. 
    , M" c+ G9 z2 x; _
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    ( @! Q5 J& S* N* X. w8 c
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    $ J) I5 M6 f, P
44. #ifdef EDMA3_DEBUG
    7 e, X" t' D3 ^3 M' W; e+ ]
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    . S& G& C* Q1 m1 v6 K: M
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    6 h! \1 U2 B$ b* B+ A+ k
52. #endif
    7 W4 u8 C% Z8 Y0 @# v. H' b
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    $ Q+ c! y4 c/ k  ~) h4 H, x# R$ w
55. #define STATIC_SHIFT                3
    ( ^% b8 `1 H1 x
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    , F2 c0 P) e: D! F5 r8 M& Y6 G: F1 g
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ) x$ m' J. u8 U; a' p. N
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    / [4 L. z( ~+ n. B* I  X0 X
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;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    * a+ ?8 R" n# O7 E% p, B! L
74. char *dmabufsrc2 = NULL;
    0 |' ^2 W% J0 n
75. char *dmabufdest1 = NULL;
    " l0 g/ z/ [9 m
76. char *dmabufdest2 = NULL;
    
77. 
    , D: X0 K  T% B
78. static int acnt = 512;
    
79. static int bcnt = 8;
    5 X' x* H  c& D
80. static int ccnt = 8;
    3 B/ f0 _' [; S) D1 I
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    $ H" x+ l/ G% O5 Q- [# B
84. module_param(ccnt, int, S_IRUGO);

复制代码

      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。
; }3 O4 q$ @0 z% p1 ~2 k$ {1 s     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
8 [: k( I/ {/ E* J
5 `1 R4 f; ^3 U
/ X4 {4 {1 H( R/ y  K: G