OMAPL138如何在Linux下使用EDMA3驱动

yyj

/ ^& W" M; w/ O/ `' b

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   5 Q* m6 d* O  X$ p
5. * brief  EDMA3 Test Application
   ( Z! d% Q) ]' P2 A: i7 V) f
6. *
   
7. *   This file contains EDMA3 Test code.
   . S0 e) X& X# e+ K0 M
8. *
   - m. M% z/ R/ {7 `1 Y( B
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ( ?3 k* k/ E8 b/ |: }
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    & h1 e% W. y) W) w) n
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    " `* T* F, ~$ L1 k: S/ C  n
14. *
    
15. * This program is free software; you can redistribute it and/or
    % [. M2 p( o/ z' A& u( _; k( G# f
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    / P2 b9 u; E6 e
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ; z  h" _1 C+ i/ g* @3 ]8 a; A% L
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    ( l1 ]! w- W" o! F* @$ t
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    " m$ d" E' l8 p( g9 E
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    $ a6 [. g5 ]3 @1 p7 R" t
34. #include <linux/dma-mapping.h>
    
35. 
    ( J! ?8 q1 V' f$ S/ Z2 K
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
      E9 J2 l) B! `. P6 g5 W
42. /*#define EDMA3_DEBUG*/
    
43. 
    0 s8 I; O+ n# c2 ]3 o9 d- T7 R
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    + U' }5 x, t' d
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    $ m8 j! O3 [/ o8 ^8 {% f
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    2 e( X0 ?6 W: d; @
48. #else
    6 I! @7 s3 Z; q; G6 Y: w
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    - U  v% Q: C$ O, G5 F0 a; u# f5 s
52. #endif
    ! d* ?5 \/ [: A+ d) l
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    & i+ v. r! a$ K3 O, O7 V& T
55. #define STATIC_SHIFT                3
    & ~7 K& x+ Z0 u9 ?) d. r
56. #define TCINTEN_SHIFT               20
    . o7 E9 A8 N; D6 R9 @
57. #define ITCINTEN_SHIFT              21
    5 x$ |! s  H1 z% C. R+ ~2 p
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    0 b+ X1 m  J6 M
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);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ) V5 J! q* y& X9 M' F
67. 
    ( }6 P' `3 _. h& S- s4 @) m; m
68. dma_addr_t dmaphyssrc1 = 0;
    5 M' R9 ~/ u) m8 U0 `
69. dma_addr_t dmaphyssrc2 = 0;
    5 ^. E% L) V, n
70. dma_addr_t dmaphysdest1 = 0;
    # h4 g7 w5 O! l" s, ^
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    / C* J1 N4 r+ L. V6 r
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    . O' y' r. q3 N0 d% Q" C
77. 
    
78. static int acnt = 512;
    ' R5 K. h6 f/ H
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    ; Q" b0 J3 z: Y4 n9 x! k% S; @, j
81. 
    
82. module_param(acnt, int, S_IRUGO);
    2 c3 a7 l. r1 E4 P) b  V
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

* W/ A% h; q/ r$ {/ L/ O% P3 ^      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 R1 O- {1 ^0 \4 [4 V) U' S! C3 p
9 Z# A' ?" ?: G. Y5 @