OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   . n- I! u: p4 ]8 s2 E7 Q9 O" `1 F
4. *
   6 ~" }) S7 r8 D* G5 w; Z
5. * brief  EDMA3 Test Application
   
6. *
   " Z! O, ]/ U4 `7 {9 s
7. *   This file contains EDMA3 Test code.
   7 O0 q* N( N2 m; @9 q0 E  O
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   - ]# x) C+ e7 Q2 J
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    6 y. r8 B% x! J* ?! y
11. *         TO CHANGE.
    6 X8 N! t4 h5 p+ n
12. *
    1 W. X5 A6 X1 j% g2 M1 k( ^$ W4 c5 {7 V
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    ( j' ]: P3 Z7 D- e# c
15. * This program is free software; you can redistribute it and/or
    & ?  N( s4 F" X. z/ l
16. * modify it under the terms of the GNU General Public License as
    4 t# J6 p2 r! ?* T
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    8 b& h  u5 m( |7 j3 Y$ K
20. * kind, whether express or implied; without even the implied warranty
    8 h, ~  |( ^0 J
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>
    # |5 W6 b  y3 r& C, }  q& v( Y
26. #include <linux/init.h>
    " T+ i, i, k, }; K4 A; o# X
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    ; g6 m! B8 G4 g0 o5 o6 h
30. #include <asm/io.h>
    $ E* e4 z- j9 b# K3 ~: |: S( i
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    . W4 M/ {$ y( e
35. 
    
36. #include <mach/memory.h>
    " d8 A; s# _! K- d1 _! a  W
37. #include <mach/hardware.h>
    6 t! `8 ?8 B  p
38. #include <mach/irqs.h>
      }5 `( I  H9 s' ^* B4 j
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)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    , P0 f/ {$ [+ r% L6 i( P8 U$ ~
48. #else
    ) l7 }2 L* v1 |  N" u
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    2 ~6 e3 M# ^+ e% ?1 R2 Y
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    8 ?$ r( A7 s1 @" {# ^3 |+ E  ]1 f
56. #define TCINTEN_SHIFT               20
    ) Y2 i2 E: V* R$ e( m4 b; t: Z  Z: E
57. #define ITCINTEN_SHIFT              21
    3 t7 ~$ C" U& h2 @: z, e! }
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    ! @) k+ z/ l2 U% w
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);
    
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);
    1 o6 N9 E- Z" G- t3 l+ h* x8 h% a0 r
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    . t7 k7 W- |% m, m4 ^6 A& k/ D% ^
69. dma_addr_t dmaphyssrc2 = 0;
    * @1 Q& P& H9 Z) Z
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    8 V* U. B6 I$ U5 l1 t( e. n& _, W$ F3 G
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    ! {* w" L4 v& U; |9 K% y# o! L
75. char *dmabufdest1 = NULL;
    + n7 }; t) h+ G+ y
76. char *dmabufdest2 = NULL;
    2 m3 M3 V- {* ~" T% Y+ x- q+ ?. N
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    ' y  s* j* k% [8 d. k0 i% T% w* M
80. static int ccnt = 8;
    
81. 
    , z, l; G) x  F6 Z6 }/ |
82. module_param(acnt, int, S_IRUGO);
    6 D' j% k4 S1 c% P' J5 h. w
83. module_param(bcnt, int, S_IRUGO);
    6 J* x1 u* K  d3 @8 G
84. module_param(ccnt, int, S_IRUGO);

复制代码

: {, v+ c9 W0 t& C      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
7 C3 u, T  d# V+ iarm-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。
% l# c  |8 X, J: M+ r" x8 K7 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。
; h& p' d1 e6 v7 }  y

  b# l# X, w9 ~' j