OMAPL138如何在Linux下使用EDMA3驱动

yyj

% R8 ?1 f% ]/ K6 m0 Z

1. [code]EDMA sample test application
   
2. /*
   0 Y) J/ f4 t, S: {8 Z6 W+ C0 O
3. * edma_test.c
     {/ q! a1 T6 N0 g: R" _
4. *
   3 e7 n& N: W8 L* K
5. * brief  EDMA3 Test Application
   ) g: M8 E8 C# Z- z5 v
6. *
   ! \& |0 U7 }+ l; ?( \  u
7. *   This file contains EDMA3 Test code.
   
8. *
   5 e1 Y; z* c! f. E
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.
    4 t; J  m9 U+ P6 }' Q8 E
12. *
    " Z/ {% q2 V! g& P0 Z3 P, C
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    $ h' O; X1 `+ L* q# x6 E- h
15. * This program is free software; you can redistribute it and/or
    9 b. Y! X8 X$ w. h1 Z  \
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    , n% f+ @; `0 I9 t  J6 {; Z
18. *
    & M! w+ D9 J" n+ P9 N2 K  l% X/ d
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    2 E) Y$ S% o, a9 N% l
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    ( b% k- P  }; Q: T2 j2 f2 V
23. */
    
24. 
    2 |- v: I! Q4 a! g
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    ( a# e6 z$ b/ {
27. #include <linux/errno.h>
    ! `3 `" m4 O; W9 Q- x
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    4 m3 ^, v% l1 ?- _  y4 ~6 i
30. #include <asm/io.h>
    + e& p" y& C& T4 v& E
31. #include <linux/moduleparam.h>
    0 s5 T4 G( q# E6 B' w4 l
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    ( r) Q$ b+ X9 n7 u
34. #include <linux/dma-mapping.h>
    
35. 
    0 \% W# V7 T+ Y# f( `+ ?3 t
36. #include <mach/memory.h>
    ( z( {9 q+ K; f% M+ ?, r" Y+ J: h0 `
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
      a+ J/ I+ ]1 i+ l+ u6 S
39. #include <asm/hardware/edma.h>
    - [1 |7 U( \# f' w
40. 
    
41. #undef EDMA3_DEBUG
    1 @0 s2 D* [/ m4 F: h
42. /*#define EDMA3_DEBUG*/
    : T) N. i" ?) }1 @
43. 
    ; a5 _0 [0 L# c; |& Y* {
44. #ifdef EDMA3_DEBUG
    * g& `3 H3 L( x! H7 F, t
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    9 p) i5 M$ J& f. @" b+ @8 O, d
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
      L/ H9 i5 e' [3 c
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    0 H' U6 s- c( K8 i5 Y
49. #define DMA_PRINTK( x... )
      |+ P* \1 q7 s; |) o
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    & B0 C: j# q" u! {' B
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    4 J7 m0 T( r4 J4 X
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    9 F. y. Z5 m, n4 u4 \
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    ) ^& b# M/ i/ B* b: ^1 S
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);
    - F/ w5 L, [) |# M
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    $ j3 x) ^4 [% W: ]
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    $ F, B" U2 E/ l+ D$ Q! N7 n- v, ^
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    # D% g& h" L+ E1 H$ F
78. static int acnt = 512;
    
79. static int bcnt = 8;
    ; B2 y5 `: |( j1 O; T4 G+ X' T0 @
80. static int ccnt = 8;
    5 B' e% n; L7 {/ ^7 \' V
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

; d" R( U' s3 I! L/ o      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
$ J7 ?' `2 s( E5 u4 n+ W9 \- Qarm-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。
) M" i% {  G/ d8 d, D  {& W     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
: q9 z( J( ]( v  J) G" O
$ s/ L; ^, x; G: y. m! d" ~
7 l$ _' c3 F( Y9 u8 |5 e3 O