OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   ! Z' Y; Q" e# i! p
2. /*
   
3. * edma_test.c
   0 m- y3 f( m, Y  |
4. *
     c1 ?5 V0 {2 I7 g1 ]+ A
5. * brief  EDMA3 Test Application
   
6. *
   - {* r  ^. F+ |1 _
7. *   This file contains EDMA3 Test code.
   5 S0 \/ @# }; p( Q
8. *
   . t% J% f0 G# i% I
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
    9 Z) g; J4 A4 R; r
11. *         TO CHANGE.
    
12. *
    # B0 M7 S# [- }6 n# |4 l8 I+ |# [8 T
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    4 b  t- `  B- U4 `/ X% L
14. *
    / h7 U/ y( S, N; i
15. * This program is free software; you can redistribute it and/or
    ' M4 X- r( N; W
16. * modify it under the terms of the GNU General Public License as
    % M2 i, O/ o  k7 n* V' |2 Q
17. * published by the Free Software Foundation version 2.
    1 L/ e, d% z, e) A+ J; z7 T
18. *
    
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
    
22. * GNU General Public License for more details.
    - |) M2 ]8 b4 n/ a$ a
23. */
    
24. 
    ( i0 d7 A1 ~: B& R  G1 g9 ^+ c
25. #include <linux/module.h>
    / b9 B6 }( j+ `) `
26. #include <linux/init.h>
    6 @0 P9 F/ z+ F6 R
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    + \: h0 f5 m& D+ c; V* @+ k
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    1 r  @! `0 w7 ~  c; E1 g9 e% |6 B
34. #include <linux/dma-mapping.h>
    6 ]) L5 T4 D5 d. Z( \3 ?* F% R
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    ; r0 c# C. U( e/ `# o/ d+ b, J
40. 
    6 H* F1 Z/ L# ~( l  [7 Y$ l
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
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... )
    ' O8 Y) ~5 v- V$ D* d( x4 ]3 [! p: I
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    / D/ K, d! D( i, U7 Z, Q. X0 N
52. #endif
    
53. 
    5 A; U! ^# f# U4 P
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    * i+ L" v( }! R3 y- S  E/ ?. T% D
55. #define STATIC_SHIFT                3
    4 f5 j7 I6 _, m
56. #define TCINTEN_SHIFT               20
    # C  }* F2 K+ Z! i
57. #define ITCINTEN_SHIFT              21
    6 q7 @5 A, d. ]$ L# t
58. #define TCCHEN_SHIFT                22
    + Y- {, f+ ~3 E; z( M
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    # B$ {$ O+ }1 _" c) Z5 _5 Y
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ( Y) X6 _7 d$ S
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    : Q; F/ E( ^; V5 x' @9 A9 D: {8 e
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;
    # I; c4 |7 D% y# ?
69. dma_addr_t dmaphyssrc2 = 0;
    " L& w, J; v7 }
70. dma_addr_t dmaphysdest1 = 0;
    9 m  e+ \6 P( X% w+ h* C
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    % }: p" b& u, t* {9 L+ T
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    ) i; {! M- {- x1 Z9 J( i
79. static int bcnt = 8;
    " k. ^9 t, s$ }3 J) p
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

4 Q+ b  ]  s4 ~% w3 I
; h. p+ j7 Z# u8 J5 Q" P; I' K      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。
+ a: P2 u& L2 X) f     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
/ W; i2 o9 _! m% X