OMAPL138如何在Linux下使用EDMA3驱动

yyj

. K! ~8 `8 U, w: }) a

1. [code]EDMA sample test application
   
2. /*
   # b/ O) t' Y- ?7 ~. `5 u
3. * edma_test.c
   
4. *
   # U4 d; b, J4 \! P+ D9 T/ c, Q
5. * brief  EDMA3 Test Application
   . J! \. O0 L; O6 u; ]
6. *
   & u" S4 j8 l+ O& {
7. *   This file contains EDMA3 Test code.
   / g& z1 t7 s) B  w5 [
8. *
   1 D' Q! |. N8 [8 S, M
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   * N5 V8 k3 j" F+ |7 m* }0 D) {0 n7 k, K
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    7 P1 S5 D' m3 h' y
11. *         TO CHANGE.
    
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
    
16. * modify it under the terms of the GNU General Public License as
    7 k1 s% B2 H( z% W
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    6 @( p1 ^. `) x' j) H; i
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.
    " X$ }* o5 a" q- B. o
23. */
    6 L+ o1 r8 s7 S) H+ K) _' m
24. 
    & {) o, j6 c. h2 Z8 u5 f1 [
25. #include <linux/module.h>
    . N4 ]3 A* J3 u+ U! k3 {7 p) V! U
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    - ~+ A4 x" J2 O; q4 q+ L# E4 a
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    ) s; ]: ^# m% Z" e* W  g8 e
30. #include <asm/io.h>
    * L& U# [/ E& V5 p! c
31. #include <linux/moduleparam.h>
    0 W# t* H; s# e* c$ f, i- Z' Q
32. #include <linux/sysctl.h>
    % \3 F. f1 v1 e; G+ E+ Y) m. h
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    " j) v2 I5 @9 }- ]! @
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    / S+ N" a; ]. ]  R* n1 ?" x
41. #undef EDMA3_DEBUG
      M" f1 O) L  M. M9 X( N2 i, r
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    + w3 v4 e, q# ]) l4 C/ y8 S
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    2 z( G7 _! i3 X$ V
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    % i6 s  I2 `1 X, j( n
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    * ?& [+ S! X' ]& X
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    # R3 o2 H! P! H( ^
56. #define TCINTEN_SHIFT               20
      ?2 I* X; L& Q9 d
57. #define ITCINTEN_SHIFT              21
    2 H# \. b' t* m/ L9 m; s
58. #define TCCHEN_SHIFT                22
    # A8 h4 n$ R, I
59. #define ITCCHEN_SHIFT               23
    , M  h9 P! d* l* F3 K
60. 
    # j+ V( W- g: c& J
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    $ L5 ^& y- @- ?/ h" J
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);
    + H6 Z2 A( f/ F, u: {/ f% v
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    & R$ d' z, V1 e# s% J
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    / W- B: X+ W. o( u  j
72. 
    
73. char *dmabufsrc1 = NULL;
    : v  n' h! k# x# b
74. char *dmabufsrc2 = NULL;
    ' V, X$ A+ g! o
75. char *dmabufdest1 = NULL;
    $ a- D) `( R" P2 I: T+ l& @7 y
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
      P, A, M, ^' n0 U5 {  O
81. 
    ) i/ b: A/ h4 H
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    4 s% ~0 X& S4 {( }6 c4 W, i+ y) u% h
84. module_param(ccnt, int, S_IRUGO);

复制代码

: E2 L0 S: N9 f! U0 x, w  d
7 x3 \; j5 o* o4 v1 t" q3 f      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
; x! R, B8 T: J; N7 Earm-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。
. b+ W) `9 m, i" I7 x
6 G+ D$ b. \4 d( M6 G$ i' X, S