OMAPL138如何在Linux下使用EDMA3驱动

yyj

% U; \1 `, Q' ]8 p% ]7 ?

1. [code]EDMA sample test application
   # _7 f; H4 H* R) R1 y- K
2. /*
   + X! L6 O: L% o6 h) M- N0 E' @
3. * edma_test.c
   
4. *
   / A' F8 a; x+ x& B; O* y& h
5. * brief  EDMA3 Test Application
     o! p: D" T9 ]& R: X- t5 E
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   ( I! L' D8 B: b; u5 l
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
    
11. *         TO CHANGE.
    5 m# z# C) r6 o% c
12. *
    : X* P, D* l" o3 c% M; Y
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
      G7 c0 t( S0 ?2 C
14. *
    
15. * This program is free software; you can redistribute it and/or
    ; ]. T9 T( `$ L. a# M9 ~
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    ! r! V) p# ]9 ^1 h1 p
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    # a6 x- i# o* u
20. * kind, whether express or implied; without even the implied warranty
    1 {/ e% o9 v2 K7 O/ J
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    - p# I# P' ]3 F9 [8 Y
22. * GNU General Public License for more details.
    # C/ \$ @! Q+ G1 V
23. */
    5 _9 a+ S" ^. s$ N; a
24. 
      v/ y/ |$ l( s
25. #include <linux/module.h>
      j9 e' N- G$ {
26. #include <linux/init.h>
    ! f+ ]2 \: {2 r  K
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    " f5 `/ X  F, R) A
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    4 K) b0 X- B8 j* G, T4 ^' l" c
36. #include <mach/memory.h>
    # K& l3 X' W# g
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    # i9 S+ b8 Z9 I# z1 O4 O( o+ |/ w
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    $ j' Q+ Q4 r% h* L1 _' C
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
    $ O6 ]7 ?: Y& B% e# Q$ k2 w" y
49. #define DMA_PRINTK( x... )
      G9 G( F; |! L' ~
50. #define DMA_FN_IN
      K3 ]% f+ ]+ ~" ?. {4 h- Z
51. #define DMA_FN_OUT
    # [8 ]4 t" V4 R
52. #endif
    
53. 
    2 ?& V* Y4 W8 N9 E6 ^
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    $ m) e8 N* r, l, z: U5 ~3 D
56. #define TCINTEN_SHIFT               20
    7 h5 A4 {5 e& k1 R8 r7 G9 f% Z6 I
57. #define ITCINTEN_SHIFT              21
    , A" \9 O) @; F9 Y3 x, H& Y& B2 g
58. #define TCCHEN_SHIFT                22
    ; I0 f4 E+ ~5 [! Y) n7 `9 e; P
59. #define ITCCHEN_SHIFT               23
    8 X& {9 G! |, v& A
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    ; p' g5 D( H1 y" k8 [7 V) M
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ) O% b- j7 W9 N, l8 ^
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);
      c6 s; e+ k/ U$ X
67. 
    , x; T/ Q! Z8 Y8 D0 A! r
68. dma_addr_t dmaphyssrc1 = 0;
    " ~1 D" @7 @( Z* b( R8 N
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    ( H/ J7 A. U, D$ w: b! ~
72. 
    ( O% b) k& X  V3 l/ O0 m3 G
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    8 Z  d+ J9 f8 g/ w- R  R' c
75. char *dmabufdest1 = NULL;
    ( q; P( C" R& u; Y) T: U
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    . z' {4 J/ M# H! l5 D  o! P% M
81. 
    
82. module_param(acnt, int, S_IRUGO);
    . t7 S  T# Y4 O1 P4 c' J
83. module_param(bcnt, int, S_IRUGO);
      Z" |) B" K5 W. K9 `% B
84. module_param(ccnt, int, S_IRUGO);

复制代码

      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。
% C2 `. a$ Y& E( u     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。


, c, {) ?2 c1 L+ C7 F+ o+ t