OMAPL138如何在Linux下使用EDMA3驱动

yyj

- x( x% `9 o! G2 ~& E2 l

1. [code]EDMA sample test application
   ! V  l6 k6 ?7 i5 q
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   ) S) ]& N9 ~2 T2 u
6. *
   
7. *   This file contains EDMA3 Test code.
   ( G4 P0 x# `; |- g/ w4 }  S
8. *
   
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.
    
12. *
    ) `' k. R) Q7 @& E2 R* F
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    3 ?. V" R* }4 w  C- Q
14. *
    
15. * This program is free software; you can redistribute it and/or
    7 v5 U8 \" c  u! b+ }, Y
16. * modify it under the terms of the GNU General Public License as
    ) l) j' k) w% u0 r
17. * published by the Free Software Foundation version 2.
    
18. *
    $ z, \: S: }, F- X  ?( T* Y" L% F$ c5 j
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
    ( Z. u9 k- v/ g( `0 _0 g, p
22. * GNU General Public License for more details.
    ( ~5 b# O- e- N# q  ?" @/ u
23. */
    & Q' q! Y1 x$ B
24. 
    - H/ J  ?3 \) y4 B# y
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
      A. x* R/ U# F  R" b' W
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    % O0 J% L& P! e; s- d
32. #include <linux/sysctl.h>
    2 h2 u- t" J  v# d& N  z' m
33. #include <linux/mm.h>
    # i% T! `4 ?$ o) U4 U0 ?+ P
34. #include <linux/dma-mapping.h>
    
35. 
    7 C; y/ T. n. L6 k. U' K' N
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    , s9 l+ A6 i# N- v$ C
39. #include <asm/hardware/edma.h>
    + H- L- S: b7 W  x' d- J' k+ N
40. 
    6 x. j' e& F% W) f5 V% M
41. #undef EDMA3_DEBUG
    / |- ^) N7 i3 u9 }* d+ s
42. /*#define EDMA3_DEBUG*/
    ) B; \: q% g$ d+ S
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__)
    ! K; |: Q% A0 _' `0 g
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    4 o( ^$ Y. q  k$ V5 c/ [0 e
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    % l. @$ s1 J. k' N" s
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    4 t6 Z# R( x, k5 A% d. C/ z5 o2 m
55. #define STATIC_SHIFT                3
    & E) ]+ d; G: [0 i6 c+ ]9 n
56. #define TCINTEN_SHIFT               20
    ( _" [' l& T5 {% x6 C8 U  E
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    & l; Z3 |0 Q" {0 `
59. #define ITCCHEN_SHIFT               23
    / w, n) k& a' Z5 G
60. 
    " X. @+ e" Z! k" g0 J5 B' D: O4 H0 ?! O
61. static volatile int irqraised1 = 0;
    7 M# `/ i" F* q: O
62. static volatile int irqraised2 = 0;
    # {0 V) c8 |  r; T/ R
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    : W7 H# {: ]  b
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    # G3 v: K; s) W6 j
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ' Y/ U; O/ z2 A  T
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    + g! @/ ~8 h+ F  E* y& w
69. dma_addr_t dmaphyssrc2 = 0;
    ) I0 P7 W; `8 O3 X8 d8 S" _
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    3 C$ I9 r" ]( v( k- I( i
73. char *dmabufsrc1 = NULL;
    " E# h- t9 V$ T( X
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    : B. \# Y( L% j3 w& o" s
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    , F$ @( {( c  t( n4 a
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    / H1 K: [1 x6 r- P% t
81. 
    
82. module_param(acnt, int, S_IRUGO);
    ' c9 I" W* _% Y( V) P9 n. M8 s
83. module_param(bcnt, int, S_IRUGO);
    7 Y: |* t# U" t+ K' |0 f1 ^
84. module_param(ccnt, int, S_IRUGO);

复制代码

7 Y1 U  }' C" F# W8 d# t8 u      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
3 y1 K2 F1 f3 k* i+ 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。
6 f, v4 h8 H- p( a- x, ^8 O; r     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

. M& C  W) b) O. ^2 j. L