OMAPL138如何在Linux下使用EDMA3驱动

yyj

4 N$ R$ F9 U' R* U' U8 e

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   % P& f8 Y  s- A3 E6 R5 s' b9 a' c
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
     k  v5 Q3 o, y8 i
8. *
   , Q! n& q% Y5 s: [* A4 I# }% C& C3 |
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
    4 }/ O& i1 k" U* z4 M" ]# h' \5 x! H
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    # Q8 E4 y& n2 ~4 \. |* s6 |
15. * This program is free software; you can redistribute it and/or
    # H+ c- C- H$ n% T% b* f
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    : O) N& [6 e- F+ x  |
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    - `: r* W) r* z
22. * GNU General Public License for more details.
    ! s, @3 `$ f' M0 j
23. */
    ' k5 s+ v4 n& V; P: G/ ]4 k
24. 
      D- U! J3 m# j2 |$ d5 W3 R- K
25. #include <linux/module.h>
    " \5 |3 R# S; c0 l9 K
26. #include <linux/init.h>
    0 }3 w  V6 Q! i) X- f- F
27. #include <linux/errno.h>
    ' ]  _4 b8 F) z5 S
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    / O* E: A, v+ K% l  d. n# j' F# W
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    $ I* J% B- o5 u4 {$ f; j
32. #include <linux/sysctl.h>
    $ O9 [4 W* Q+ \( e) Z) m# q
33. #include <linux/mm.h>
    / i9 B3 `1 ?. [
34. #include <linux/dma-mapping.h>
    
35. 
    ; H, V$ q7 Q6 d
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    % Y  U3 {6 u6 W1 d2 H$ Q
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    8 M: z0 ]. F$ b+ E3 p& a% M
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    ' D( |9 V  x: ~* K0 H
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    4 N! p) N  m1 [: B% ?6 r; N3 z7 U
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    / {3 u- p" U% T0 u
51. #define DMA_FN_OUT
    + J5 A2 q, K* T  |7 `! d0 Q
52. #endif
    
53. 
    1 |) f+ _. a) ^, w8 |8 |
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    " ?$ W: h; O3 k' H2 E4 t! b, u
55. #define STATIC_SHIFT                3
    # n6 k+ K* `, K1 p5 ?
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    % n' ^1 m( ^* w$ W( t5 O
60. 
    + B& U* K. ?8 ]6 I: L: i! j- q" P' S
61. static volatile int irqraised1 = 0;
    ' _) l" j6 r; I$ j/ f+ c4 `/ T
62. static volatile int irqraised2 = 0;
    
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);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ; V6 |2 }; v( E8 a8 Z! u9 ?7 q
67. 
    & n. v/ F6 n/ A& j7 N
68. dma_addr_t dmaphyssrc1 = 0;
    0 D. I; W2 x' x0 s
69. dma_addr_t dmaphyssrc2 = 0;
    ; @) r  W  A, w; C# Z- C* @
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    3 \3 c" W2 E4 o/ [. D- v
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    ! k# u. m; l! _' E( ?
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    & H0 h% y$ w. A7 D0 K
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    ; V- H6 X4 K, w" y/ J1 e, `
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

: w" D, W. [' a" R- l4 e, K4 b
      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 G6 ~3 K+ d& I) l, K( @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。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

  p" {6 m1 t- f/ e- ]