OMAPL138如何在Linux下使用EDMA3驱动

yyj

# n5 ~2 ~+ y4 V  V, X6 x+ m

1. [code]EDMA sample test application
   ) W. n1 J5 a8 n5 L2 i( a0 |* K
2. /*
   1 e/ O6 v# k, u, Y; P, J
3. * edma_test.c
   
4. *
   " n9 F" C5 `7 L5 _
5. * brief  EDMA3 Test Application
   
6. *
   6 {/ q) q. o3 I, ?
7. *   This file contains EDMA3 Test code.
   7 s/ }8 I: O9 m. b( ?" [7 `
8. *
   ! ?+ h/ G& M' S
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
    6 P9 T4 p4 @, A, _' z2 O; R! u9 r
11. *         TO CHANGE.
    % h8 `+ ?2 H# ]' M) u8 i7 t
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    + n) j' K& U) I" g& B
14. *
    
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
    ; x/ [* z2 ^- i% e
17. * published by the Free Software Foundation version 2.
    + O' S6 M- l* A9 q/ L
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
    
22. * GNU General Public License for more details.
    # G" R) ~  J0 D# Y
23. */
    0 K" Y, J5 \1 F2 C; ~
24. 
    " ?9 K* a, w' R. W
25. #include <linux/module.h>
    & k8 e3 y9 g% P4 ]6 k5 @. k
26. #include <linux/init.h>
    : P; X/ C" q) W! x5 A
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    ' p: U6 z0 z: C; W  k; ]
31. #include <linux/moduleparam.h>
    - C5 v; R& u# ~3 x% P2 k
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    $ R  n6 R; V* ^, }- k
34. #include <linux/dma-mapping.h>
    , p2 N: c: v) ~; X# u; m" V5 ^
35. 
    ( z0 C, v( S, _4 V, M8 E
36. #include <mach/memory.h>
    % N/ j& \6 Z; J8 ^: @
37. #include <mach/hardware.h>
    4 h3 s) \4 E; G3 j6 a
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    + }* f% ?8 C& E$ ^' g
41. #undef EDMA3_DEBUG
    . d6 G- G) ?/ w6 O* r
42. /*#define EDMA3_DEBUG*/
    
43. 
    " W$ F1 {! h6 i( ~
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    3 L; x  P! N4 u( @' ^
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    ' h% t% u6 v8 u
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    , x% @" y+ I! G* E' X% \9 P
49. #define DMA_PRINTK( x... )
    8 N" `6 w$ f3 S- v4 {, V
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    0 P) f5 g9 j  B6 r' Q
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    ) c. h" ~' G/ u6 F1 y. V: z
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    ' w0 U$ x8 N# T2 j; V
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    # O* l' m* L% R' D
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    3 w2 L3 b8 v$ ]1 h- f
63. 
    + ^  a7 r' y" o: t! P$ _
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    / m7 T1 F/ l; ?2 H6 Y- Q
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);
    
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    $ [7 E7 j5 y) M5 w( M! Z3 M9 s
69. dma_addr_t dmaphyssrc2 = 0;
    6 j8 H8 @8 m" P- F1 o7 U& ^
70. dma_addr_t dmaphysdest1 = 0;
    . r7 L- X/ ~8 _  g9 Y8 M
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    : N5 @" j: }9 @) I# H
78. static int acnt = 512;
      [" G# r  O. Z: k9 t3 U
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    - Q/ I) d8 Z& |0 G6 W$ ?
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

* }( c8 c  J) _, \3 _3 M3 ?  R9 \. A- b$ R      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。
* {1 ], `( {  T! x7 }, c( |1 a     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
! N& F) g) t$ F' @$ L

# U% \5 f% g5 U