OMAPL138如何在Linux下使用EDMA3驱动

yyj

  x; o" i5 Q- a0 s0 H

1. [code]EDMA sample test application
   
2. /*
   ; h( F6 ^1 [$ {" u
3. * edma_test.c
   
4. *
   , {1 H+ n5 [* @5 A
5. * brief  EDMA3 Test Application
   8 \( L. A  K( s6 t0 r3 P
6. *
   
7. *   This file contains EDMA3 Test code.
   : c, f6 z, @3 l) }0 f* d9 _
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 D6 Z% U/ ]  a+ x* T8 g1 y. Q! b
11. *         TO CHANGE.
    
12. *
    / {6 n3 H) S6 l( K/ x' _
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    . I5 W5 y  }. f: J4 p
15. * This program is free software; you can redistribute it and/or
    2 _6 `: N0 B) a. f$ C( }4 M
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    & I2 }7 r2 ~* J; F  c3 l8 Z' E
18. *
    
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
    : s. p/ O9 w. W% d. G
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    ' V, J% l9 P7 c
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    # g; Q8 g: z& J( z
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    ( G0 {/ k4 N" ~- r+ L" ~
33. #include <linux/mm.h>
    1 T1 v4 c! T0 N: w6 d% e
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    3 r4 o' g  V8 [1 J
37. #include <mach/hardware.h>
    5 `( @. u; W' T
38. #include <mach/irqs.h>
    / d$ z( H4 `( D
39. #include <asm/hardware/edma.h>
    ( N# i) p4 q- ?  {- I" H8 |) s  s
40. 
    ; b' z! ]1 ^0 l1 z
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)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    5 J! o7 T5 r& l4 V8 c9 @
48. #else
    ' [- @$ I7 h% V
49. #define DMA_PRINTK( x... )
    + s2 ?! g; J* C, [  S+ \; B/ R. p
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    1 T) i1 _: R: x1 q! P
52. #endif
    
53. 
    " q& \5 t2 T! x9 j
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
      l+ i7 L* G; o6 X! a
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    0 ]6 g# K$ T" e9 f6 E
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    3 Z$ M, {. G3 Z/ K' l
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    3 H* v! f% T8 S8 \3 b6 u
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    % G* G$ B: {" _% Q1 Q
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
      D3 G- ~% m  q1 a
70. dma_addr_t dmaphysdest1 = 0;
    $ h1 U# [7 j: T8 S/ q$ h3 v
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    # o  T1 r4 y' ^" e7 ], u- T
75. char *dmabufdest1 = NULL;
    ( \/ X- @6 [- j3 ]
76. char *dmabufdest2 = NULL;
    : Z. J4 t" I4 i" T6 F8 T
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    % J- ~* ]9 @! |3 {4 B4 A
80. static int ccnt = 8;
    
81. 
    : ~$ R% t$ @) q6 m, L6 S9 k
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

4 I* Q1 D0 b3 v" W- F
1 L) _0 t* z' t. |7 _      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。
; e: I; A, m0 p     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
; x3 k" P( @% m; u: A4 r# L

) E! h& o+ p; n, v8 v  w