OMAPL138如何在Linux下使用EDMA3驱动

yyj

+ J, P+ C+ }+ o/ n* M8 U$ n

1. [code]EDMA sample test application
   5 H5 ~; @7 w1 }" o4 u  m6 P, k; w
2. /*
   
3. * edma_test.c
   " p" W* Z, z; E& d& ?
4. *
     p) X! z$ M" l1 \9 [
5. * brief  EDMA3 Test Application
   
6. *
   . w/ }& g& z  c1 C$ O; _
7. *   This file contains EDMA3 Test code.
   8 s$ ?3 f) D+ L: o" d
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
    5 A2 Y  P0 z: M$ V% t
11. *         TO CHANGE.
    3 l  J" @/ ]( @/ |) a
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
      ?$ Z/ P3 d2 S: h" k
14. *
    3 n$ V, K  p; b. h( p
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
    
17. * published by the Free Software Foundation version 2.
    - v5 V1 l' F, `3 T1 ^) T! B$ Q
18. *
    1 A, W- g# a5 w$ M" z
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    + k/ [# Y7 p( @* C5 ]
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    ! a! H, N1 o! p/ D# J6 }3 o3 m! o
23. */
    
24. 
    9 ?3 ?# k1 t$ Q3 R8 L6 |4 T$ P
25. #include <linux/module.h>
    3 y0 l9 @7 C% l
26. #include <linux/init.h>
    4 T6 k7 O* i6 j, I* v8 v
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    7 j* |5 B- M' C+ z
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    . `6 I9 _0 T  q- t6 d
32. #include <linux/sysctl.h>
    2 Z, [" x* b: R3 p! f2 `; F
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    9 }: P5 r: w% o' M% [# I
35. 
    
36. #include <mach/memory.h>
    6 n/ ]3 E1 c3 s, A# |7 W% N
37. #include <mach/hardware.h>
    " m; w' g' Z' I" D$ s. O
38. #include <mach/irqs.h>
    ) d; r2 z8 S( V$ F. ~! y; X% y) n
39. #include <asm/hardware/edma.h>
    
40. 
    8 a% [  _; H/ @! e
41. #undef EDMA3_DEBUG
    0 \5 O: e# V' q! [& i1 {. M
42. /*#define EDMA3_DEBUG*/
    
43. 
    + W" i; M( S/ e2 c5 |' H/ i$ n& [+ v
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ' m, X' F  L6 X! h
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
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    - J$ F( X% K  ?2 v. Y1 z
52. #endif
    
53. 
    ) d" F+ j; J; z  e( H; C
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    - e; {. c* x4 d. @
56. #define TCINTEN_SHIFT               20
    * e8 L4 W5 F) B& l
57. #define ITCINTEN_SHIFT              21
    4 C0 b" A$ H; t
58. #define TCCHEN_SHIFT                22
    , I& K6 X& q: N
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    " m+ Z  V0 Q  r& y
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);
    ; _4 A, B  i" {* j
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    4 i( w* P5 t) x7 A
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    ( `  ]2 V/ }/ G& Y; m9 T
69. dma_addr_t dmaphyssrc2 = 0;
    & S4 @, N* i- g. l% v% ?* A
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    7 G& ^) x' r  V0 v0 b
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    - |$ [+ {0 i9 ]; m$ n
75. char *dmabufdest1 = NULL;
    % h) E2 k0 w$ [! Y7 p0 O1 O
76. char *dmabufdest2 = NULL;
    6 P' ^+ u: Q/ {; m# T& B4 S
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    $ O: ]- }# A' l' W+ L" u
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    - s: u7 K, Q: x/ p3 f) h
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。
2 Q: [" E1 |# T" d. k7 T& Z# y2 c( V     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

8 c% U+ C6 o7 D- L8 @9 }6 R
! f2 t* ^+ z. s& G2 n