OMAPL138如何在Linux下使用EDMA3驱动

yyj

# T2 `4 r% o+ [% z: B3 y/ R

1. [code]EDMA sample test application
   - k% W. V' Z" m7 A' V5 D/ T
2. /*
   
3. * edma_test.c
   $ F2 F- q) L: Z1 r
4. *
   
5. * brief  EDMA3 Test Application
   # t* J! z- D$ l" H9 C: _$ G9 D% u
6. *
   
7. *   This file contains EDMA3 Test code.
   " b9 [. x( c! k; N) I, B  d" a
8. *
   1 O  W4 ?5 l) X' g
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   1 |" l; O8 K6 v0 i6 R% V  T6 M
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    0 \5 k+ w7 D9 Y  J) Y) P8 K" N! h1 S
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    ; U* N0 F' d- _' G7 J3 e0 W. z
16. * modify it under the terms of the GNU General Public License as
    " m4 F& Y6 B8 Y& i! z
17. * published by the Free Software Foundation version 2.
    4 T' L( U+ P% f9 K8 P
18. *
    1 Z( S" |- |) d( T5 Y2 f2 T
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.
    
23. */
    
24. 
    
25. #include <linux/module.h>
      `1 _3 `% r* }+ W
26. #include <linux/init.h>
    ( m3 J& _2 d/ K( r7 ]- \+ a
27. #include <linux/errno.h>
    $ N% S( m9 |/ i3 a7 Y2 a
28. #include <linux/types.h>
    2 p! @$ I) x9 n( p8 @
29. #include <linux/interrupt.h>
    4 d# D- _: s0 c  W# g* y% X
30. #include <asm/io.h>
    . N  |/ N1 P, C' _. _0 B, J( R
31. #include <linux/moduleparam.h>
    ! {; `9 {+ G' J; \
32. #include <linux/sysctl.h>
    ) `" T( |0 f6 s4 f: o1 \% j6 s) m
33. #include <linux/mm.h>
      L9 }$ J3 Y7 j
34. #include <linux/dma-mapping.h>
    4 L) H* ^6 C$ q' ?7 h
35. 
    
36. #include <mach/memory.h>
    , e7 z; V0 M# ]5 z
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    ( i9 I2 O# g# t
40. 
    9 H" ]. Y+ u& ?
41. #undef EDMA3_DEBUG
    ) d9 H  Y# N( M  P
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    - c+ J3 N5 O: [
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    " [# S$ `, w- _+ ~7 y- q
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    # r% Z( \+ q; M, K5 M
51. #define DMA_FN_OUT
    8 \/ n* g+ u) _0 D8 h
52. #endif
    8 x0 v0 T3 t' W: L! D
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    & ^1 v  ]; b$ w; h$ _. X
56. #define TCINTEN_SHIFT               20
    % q, Y% p6 b1 a
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    % [$ E6 I5 h$ R- k6 R3 L
59. #define ITCCHEN_SHIFT               23
    
60. 
    7 w) H# I$ h0 X6 Z1 R2 W( A. @
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    ! r+ O" q' r$ c
63. 
    " s" c3 R4 d9 n" z
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    3 G% R3 P0 h# L* P
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);
    
67. 
    - ^0 i5 ]/ p; f# B1 [& D
68. dma_addr_t dmaphyssrc1 = 0;
    # D7 V) Y2 i- D/ b
69. dma_addr_t dmaphyssrc2 = 0;
    ( ]' \- L3 A% `5 B) o: O; a% o3 r) ]
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    4 O  g& ?' q  g- r$ N  r
74. char *dmabufsrc2 = NULL;
    " s1 T8 p& K$ _/ e
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    2 B: ]( T: k0 O
77. 
    - y2 P9 a# g; p. r8 Y9 B" ^
78. static int acnt = 512;
    ! W7 c, @2 o# T1 X# S& j4 N
79. static int bcnt = 8;
    . X" I2 I5 x. Q; E4 N. z8 l: x9 W
80. static int ccnt = 8;
    
81. 
    : f& U; G( ?, S5 A
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

% g$ n' _5 B. Y8 f; W      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。
6 Q5 L$ C% C: @5 f9 p. G9 P6 w