OMAPL138如何在Linux下使用EDMA3驱动

yyj

" Y9 b# G* i( M

1. [code]EDMA sample test application
   * |6 @& x7 ^: y) n$ y8 S3 j
2. /*
   $ N0 w- s) o5 B1 s# s0 l
3. * edma_test.c
   
4. *
   % _  X2 ?8 m( l, k# a& Z, c& \( e: T
5. * brief  EDMA3 Test Application
   * W) [! C5 B9 X4 Q. R, S( j8 z
6. *
   3 F6 q! R  R) l8 \, B2 ^2 A$ K
7. *   This file contains EDMA3 Test code.
   ) T+ S( C2 W6 i, _# U
8. *
   / l! m" l2 w& p; B
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   5 W8 ~" u" m: L, v/ n9 A0 w
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    $ ?4 ^  x: o/ t) O
11. *         TO CHANGE.
    : K# f7 U2 i8 r3 p5 @! u) Z$ n
12. *
    ) i4 P3 p/ v0 `* ^4 f! r
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    + @5 |8 `- x# E5 A3 U, ~5 j9 [5 L
14. *
    - M% N& v& J  T+ w$ q- K
15. * This program is free software; you can redistribute it and/or
    
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    ' c6 d! Y7 m- D" ~7 M' n2 l) t0 ^# g
18. *
    & @& @7 N$ {0 q- f
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    6 g6 |; \; b' |7 H
20. * kind, whether express or implied; without even the implied warranty
    : \! U! r0 N% |$ T. U7 d3 C  [, x
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    + _) x+ t( g# F. `9 M$ _
22. * GNU General Public License for more details.
    
23. */
    ) r# c# D" r4 ^, A' |7 p
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    % J7 K+ U) U7 J
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    / n3 K9 `- Y, V& @: x" s
30. #include <asm/io.h>
    9 U  t4 r% W  C5 q& Y
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    - P. X! V! D1 y# o# f1 z, i6 r
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    0 q. U2 R) g/ ^- A& x6 m
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    ) v9 x9 ?* C& T' p. q( K
40. 
    0 R8 N- Y5 I# d+ b$ r4 K% b
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__)
    1 ~3 U) {4 A" R
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    " L: `. D; F5 d  [
50. #define DMA_FN_IN
    * |  l0 e9 Q3 M6 f* D& k; W
51. #define DMA_FN_OUT
    7 O8 A; q. z7 N2 u; [; J4 y
52. #endif
    
53. 
    - G3 E/ ^3 \5 a
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    & F  R7 A: ]9 O5 F3 H
56. #define TCINTEN_SHIFT               20
    0 M, F: s& M& \. e' V
57. #define ITCINTEN_SHIFT              21
    + v5 z# j1 M5 f: e8 T$ ^
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    9 G, r# z+ `7 k- I' v2 n) O# Y: M' E; o$ U
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    ) v7 n$ d3 y1 y
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    % Q; ?3 z* j  s1 f# y2 m5 s
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);
    8 D8 _* N$ X3 U; P
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    ( i9 S1 |, r4 f# Z8 e
70. dma_addr_t dmaphysdest1 = 0;
    + @1 a- V1 d# Q$ A$ ~. C2 y
71. dma_addr_t dmaphysdest2 = 0;
    + [1 N0 M  w) @/ V! t! w* U
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    ( g+ ^, S- }/ U! f3 B3 a
75. char *dmabufdest1 = NULL;
    2 f" ]) E3 E# H  w1 l# U
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    " i, s$ }- n3 X. x: f. ^- L
79. static int bcnt = 8;
    $ ^' u3 l- x& \$ ~- m
80. static int ccnt = 8;
    ) w( T" R0 |8 z, D. y( |
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
      G, B" U9 {6 W/ n  N  B- d
84. module_param(ccnt, int, S_IRUGO);

复制代码

4 ~6 y6 O0 U/ A* \; j) |! q
      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。

, u& R. t. N1 N# C
+ V1 A$ T# G0 n3 k$ x  q+ E