OMAPL138如何在Linux下使用EDMA3驱动

yyj

4 M* e; W- w" Z

1. [code]EDMA sample test application
   ) r: [% w; x; I9 g6 d
2. /*
   
3. * edma_test.c
   . M* v5 Y3 F& E# G9 k
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
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.
    + }, U. {* g: G* _/ n
12. *
    ! S& H- K6 u( B# ^5 N
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    " O  A. o5 S" |+ c/ O0 v
14. *
    : x9 ~# S. m6 Y0 c. H
15. * This program is free software; you can redistribute it and/or
    ) d7 P0 a- `) ^& F' a9 Q
16. * modify it under the terms of the GNU General Public License as
      H8 [. ?- x, y  v0 g( O
17. * published by the Free Software Foundation version 2.
    
18. *
    - @0 R* \. |/ R( X# I5 ^% {
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    # L( ~' A* F2 m! M* x# C
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    ! y. I' z! N) ~4 A% l' J
29. #include <linux/interrupt.h>
    " H2 W3 I' r. n: h
30. #include <asm/io.h>
    & B( z) g  l: i0 p/ s6 A. L
31. #include <linux/moduleparam.h>
    + K0 ~7 z7 X4 B, U. U
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    ) h" `& w5 Q$ M8 P) j' C6 Q
34. #include <linux/dma-mapping.h>
    
35. 
    # R# R, V' ?" M/ T" c! E7 V
36. #include <mach/memory.h>
    : u# H/ D) p/ U+ G( q$ v
37. #include <mach/hardware.h>
      @' M( w0 x: ?1 B
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    3 r3 {1 s. W: b
40. 
    
41. #undef EDMA3_DEBUG
    5 K9 v( }0 X/ S8 ]3 r
42. /*#define EDMA3_DEBUG*/
    2 N. ]6 W* Z" R' T: j5 v+ Y
43. 
    ) r7 ?" y$ }& O) P3 c: |
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 ]  o+ j. ^# i' M
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    ! \; q" T; i. A
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    2 W" k+ C. q& K5 i* B6 P) N$ B
52. #endif
    
53. 
    2 @" `) y) Q' G( l+ ]3 m2 G" ?6 u
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    2 }0 g  c/ z3 }; b, C; C; {7 i
56. #define TCINTEN_SHIFT               20
    ( ]  n( |( y+ S. y2 c6 t3 O
57. #define ITCINTEN_SHIFT              21
      `: g! b( q1 G* B3 c
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    # `, w. E, J* c/ B
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    ! q$ w1 p7 P. s6 l7 k7 }( f" v& L
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    3 l8 K- d' Y9 m
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    , j& T( f; [1 N+ z* N5 }; z
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    0 r& i( \  m$ R% I/ y
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    # G/ g# i+ H- L
72. 
    , g1 E4 |8 I4 h/ M: d5 s4 Q/ `
73. char *dmabufsrc1 = NULL;
    . b; Q/ R, P' o8 L
74. char *dmabufsrc2 = NULL;
    9 W- C, x8 A1 ~/ X% O" E, @
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    8 A0 l1 l0 D% J8 g
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
      Z" @) K) O  z
82. module_param(acnt, int, S_IRUGO);
    ! j* C/ t9 v! x9 ]" W1 R
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

, X$ ?# j# U% p9 X! l  A, B: \
9 f2 F, F, S3 p" {; T8 |      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 _+ b5 ^$ }9 g; \+ g     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

2 b' |4 o: ~  M0 f; `
' b0 F$ b3 \0 ^8 i