OMAPL138如何在Linux下使用EDMA3驱动

yyj

1 h0 e, f* j, s

1. [code]EDMA sample test application
   
2. /*
   * {4 O/ B1 W, |2 h" o! d9 g$ @
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   # n# X" N: \6 ^( @0 g" A4 w
6. *
   3 W; ~% w, Z: M- `6 @  k
7. *   This file contains EDMA3 Test code.
   2 ?: k& f0 n8 Y2 D/ @) j% i* ]
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   3 @2 O2 o* w# U2 C$ Z
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    ; }- ?1 S: M: W0 i8 R3 D/ e* Z
12. *
    ' t( ^" v" z4 u, \9 z( Q- x
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    . z' P6 |1 l0 U- l5 M. s$ @: u
15. * This program is free software; you can redistribute it and/or
    / N5 T3 _0 h7 {$ ^0 s; i$ m. D
16. * modify it under the terms of the GNU General Public License as
    # [5 n" P5 Z' W. \
17. * published by the Free Software Foundation version 2.
    % g! a( a/ F# c4 ]& ^! V9 m
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    . l" B8 V" H) {/ A, Z7 s; }
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    4 {% |0 \  D7 Y% {0 Y/ y
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    ) j: J3 `5 W5 o! A
26. #include <linux/init.h>
    & z( s# Z6 g2 X: A+ N
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    5 r9 A) l" s2 ]6 P0 y$ e; k+ p
30. #include <asm/io.h>
    6 T# W  t2 @+ k6 T# q6 M3 N1 V
31. #include <linux/moduleparam.h>
    : ?/ \6 t. S3 l
32. #include <linux/sysctl.h>
    4 u, {4 ^7 r1 T
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    8 W$ T' @- b8 p/ H- h' [
35. 
    4 Z/ C2 n- {6 b' R# f
36. #include <mach/memory.h>
    0 V% R' l* k8 R% u. W0 P3 s" I
37. #include <mach/hardware.h>
    5 t5 {- `0 d  M
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    - f0 Z4 Z3 C! F7 [$ D6 s
43. 
    
44. #ifdef EDMA3_DEBUG
    
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__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    7 h; x. o1 |" Q( ]
51. #define DMA_FN_OUT
    % L2 f8 j$ @7 C: l
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
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;
    ; b, X  W7 k, i# [. p% R$ F
62. static volatile int irqraised2 = 0;
    $ A) w% Z! e. n
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);
    ; J" m4 ?; \7 W5 i5 I
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    . c4 L7 `- k" W6 t
67. 
    5 n6 W. g! u# k& A$ b6 U* f
68. dma_addr_t dmaphyssrc1 = 0;
    ) K3 y; H% f* O' `
69. dma_addr_t dmaphyssrc2 = 0;
    : R" z( y/ n8 ?% l
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    1 a) P+ O' ?, |9 @5 P
72. 
    
73. char *dmabufsrc1 = NULL;
    + [6 Z, }  ?- G; _& P
74. char *dmabufsrc2 = NULL;
    4 @0 L' Q  c( {% S1 j6 L
75. char *dmabufdest1 = NULL;
    - h+ ]: G& S; o9 P6 I5 i
76. char *dmabufdest2 = NULL;
    * M3 a  }8 o: r5 `4 r
77. 
    
78. static int acnt = 512;
    7 t( y' C- B1 c+ R$ i) a- t, P
79. static int bcnt = 8;
    / n# g. I; x* D% W
80. static int ccnt = 8;
      ?+ p9 j2 x) v$ ]- G
81. 
    ' e7 ^# d+ W; U- }, Y& W5 ]4 ?
82. module_param(acnt, int, S_IRUGO);
    0 R' x1 b9 c; n3 n7 Y: B
83. module_param(bcnt, int, S_IRUGO);
    
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。
( {/ W, i9 r2 u+ Q( [9 a# o  t0 f# Q( _     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

( q5 Y$ ?# n$ o$ Y# \: N( I! A
0 W4 ?* c" O! W+ t2 ^, Z: A5 h