OMAPL138如何在Linux下使用EDMA3驱动

yyj

) t3 p, T1 T# c' S# `0 p8 w

1. [code]EDMA sample test application
   % D5 C) V% j7 C: D9 f) B
2. /*
   3 j" z# {% }$ s* q+ z: b1 J
3. * edma_test.c
   
4. *
   " x+ L" k# z7 y% o, F3 U6 R# o- ^
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   7 I* B( ?& _( J6 Y% ]" J% c
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   * w: x. u3 U+ _% X8 t, x& x
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    8 F% C  M9 m' a  k+ B$ s8 h
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ' N( l5 [5 P( [& p
14. *
    + R. C+ q. [% f* Y5 a
15. * This program is free software; you can redistribute it and/or
    ) O$ f# W  r' ]7 `, l
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    4 ?0 x8 B7 Y- f
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    / v( G2 L" C0 I! u! W' }& K
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    / D# N, ?% G5 I* l9 R2 @! H  F
23. */
    
24. 
    2 ?! _  [2 s7 F
25. #include <linux/module.h>
    1 ~  H9 d) H- I# M
26. #include <linux/init.h>
    " D  @2 b7 t2 P3 G+ e( e' d
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    $ b. l* K* k9 ?( K: _- o' K
30. #include <asm/io.h>
    - y: P+ l+ F( Q: O# v
31. #include <linux/moduleparam.h>
    9 J! y! L5 c; [% n" S
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    2 j9 ~+ _5 C( ?3 ~
35. 
    1 o; h( N. S* G1 n2 k. D" _
36. #include <mach/memory.h>
    ' P+ v0 Z7 O- G3 J1 g0 E  T
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    6 A. E* z$ `. l% c0 t
42. /*#define EDMA3_DEBUG*/
    ; {3 S+ E$ ~* O
43. 
    ' L5 {; q* j0 y/ P+ y
44. #ifdef EDMA3_DEBUG
    . E; R! ]3 e! w% B: |; G* D
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
    2 Q: T0 N; [7 g% W: Q2 L8 e
51. #define DMA_FN_OUT
    $ c$ k3 l5 V9 F+ H4 n$ U
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    7 f$ M$ S& b7 K
55. #define STATIC_SHIFT                3
      d! s1 V, B8 U5 P8 L
56. #define TCINTEN_SHIFT               20
    # z) v' X: n) n; u, d  K- j/ i6 s
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
      @6 q0 U7 t" H. h  B
60. 
    2 G) ~; L# j1 @- ?1 C( H
61. static volatile int irqraised1 = 0;
    0 o( Z3 E( A5 d( b
62. static volatile int irqraised2 = 0;
    
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);
    3 b, ~5 k+ l: C* B' b8 _+ V
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    9 H2 k& J  F" W5 f6 |7 e: Z
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    . G. o1 I9 n/ l8 B) L$ a
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    7 A4 O& R, m2 c7 ~8 U" U8 g
72. 
    
73. char *dmabufsrc1 = NULL;
    # s" q" A0 n% \" |
74. char *dmabufsrc2 = NULL;
    * W2 e) h0 f1 p4 Q1 P% j
75. char *dmabufdest1 = NULL;
    ' r: z7 K& v. p5 O
76. char *dmabufdest2 = NULL;
    - o3 G9 z. e3 f8 m
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    * s" c+ A" y/ ~* k
83. module_param(bcnt, int, S_IRUGO);
    6 o: c& y% N6 {5 [' B3 V$ g
84. module_param(ccnt, int, S_IRUGO);

复制代码

; n# N/ z( \0 L5 e. G& k# G2 P
      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
% a3 q# f1 ~/ S6 K# O: ^' c+ tarm-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。

; {( y0 ~) q- ?7 X) s% k# ^2 \+ ~
% g$ M; H3 c1 {