OMAPL138如何在Linux下使用EDMA3驱动

yyj

$ _5 f8 ~" @0 h; |# q1 N

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   0 `1 V. @0 x+ R6 I
4. *
   
5. * brief  EDMA3 Test Application
   2 O% {! C9 z& o8 n
6. *
   9 `* l4 s* j& ^
7. *   This file contains EDMA3 Test code.
   & X. A% @& t/ H7 Z$ w- ]
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.
    ! b$ V, o, Q* I+ s. g9 D
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
    + A* G/ u$ ]8 K: {
16. * modify it under the terms of the GNU General Public License as
    , [' d  V: r$ O  N
17. * published by the Free Software Foundation version 2.
    $ V2 `/ K: |: [0 {( ?4 w7 X
18. *
    8 ]& b( `& z8 G, b" L
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ( H5 G- s0 a7 g7 D* x7 C4 O% d" n
20. * kind, whether express or implied; without even the implied warranty
    6 A, e0 }, r6 @4 T, e' l4 |, k8 D; E
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    & ]% B+ ]+ \, @  O0 I
22. * GNU General Public License for more details.
    
23. */
    5 A; H/ h$ a4 q, T" D
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    % A  Z* ~5 p8 L& Z. _' _
27. #include <linux/errno.h>
    & E$ w% h1 B: n2 E, v8 H9 M; e
28. #include <linux/types.h>
    / R& i& S/ U3 r1 @9 A8 s4 w6 ~
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    5 u3 \% p, Y9 x! E1 T) o
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    " ?  g, ]9 A# g5 Y
33. #include <linux/mm.h>
    6 N+ {& c) M6 V$ ]1 r" h
34. #include <linux/dma-mapping.h>
    3 j) p* E4 D4 g  n8 d, j
35. 
    
36. #include <mach/memory.h>
    7 _9 S/ {$ {: H
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    2 j( {3 v0 T+ j4 n: m* `6 Z1 {
39. #include <asm/hardware/edma.h>
    
40. 
    : ^" j. V4 @, P2 u$ K: r8 E% _
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    3 |( ?6 J# ?9 y4 e% b/ r
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__)
    ! @( _6 T8 Y* i4 m: v7 e( ~$ x+ S
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    ' X1 Q/ t* g: s8 _+ n9 I
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    / {6 `! {7 n+ M! E  F
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    3 _7 W5 P2 D, [6 W0 X% T8 F
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    # n/ n, f$ m2 V: v$ B: D( @
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    6 }( i+ v) @' ~' s8 H, c! b4 V
60. 
    , `" D5 p* a  A& W+ W  R* W* F
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    ; ^8 H; _* p4 r8 z
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);
    
67. 
    , o' b: M' X. l' f/ s3 s) n8 t* q
68. dma_addr_t dmaphyssrc1 = 0;
    8 n1 `9 ?: E+ Y3 C1 E2 `: Q
69. dma_addr_t dmaphyssrc2 = 0;
    3 S* t9 I9 Z* i" w
70. dma_addr_t dmaphysdest1 = 0;
    ( n. V3 R' w/ b
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    5 _! N4 ?2 e9 n) o- l6 u3 d4 |
73. char *dmabufsrc1 = NULL;
    & T, v1 A$ Y0 S
74. char *dmabufsrc2 = NULL;
    8 m. y$ R/ a& i' O: E% w$ z" r
75. char *dmabufdest1 = NULL;
    ' b2 g0 y* ~1 k% g# T
76. char *dmabufdest2 = NULL;
    . z, E6 @$ L' D$ w0 R0 `$ D; W* }
77. 
    - i2 v  {/ M' n& x4 V
78. static int acnt = 512;
    + H6 X9 e/ f  _5 v0 t. C; q: U* L
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    0 x8 z: e7 ~1 _. R
81. 
    3 ]2 ?5 R# q3 j/ W$ A7 d8 h
82. module_param(acnt, int, S_IRUGO);
    + [% f4 n. N- I2 ]) V
83. module_param(bcnt, int, S_IRUGO);
    + C, F9 R  k5 t" K
84. module_param(ccnt, int, S_IRUGO);

复制代码

5 l& V3 G  z/ g) t
# O. i  u4 u6 {) x  E      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
" c( C1 Q! x5 y3 U7 B: ?9 `( J+ Jarm-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。
9 j$ D# ?0 }5 L' [

7 x/ F3 u% }. o/ B: b