OMAPL138如何在Linux下使用EDMA3驱动

yyj

- H0 T* a3 B4 w- Y: k5 U

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   1 i/ B$ m/ k- x# N$ V9 S' ?) L) Q
4. *
   % h. j) C9 h- o3 P- T
5. * brief  EDMA3 Test Application
   : W6 n1 {+ O' l2 D- f7 o& L% P3 L# F
6. *
   
7. *   This file contains EDMA3 Test code.
     n: o9 `' Q- ?
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
     }# g! ]9 n! e: x) d( i" Y3 c
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    3 L) M0 x/ \+ T$ U7 \# u3 f
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    3 R0 G7 }- c* [0 W/ J
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
    
17. * published by the Free Software Foundation version 2.
    % j6 R/ {5 g; S
18. *
    & P) K! a: ?1 t4 @; x
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    # a; l; k  y0 W! \$ n: \5 v% }
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ' m5 d% t2 m" _" |3 k6 a
22. * GNU General Public License for more details.
    
23. */
    
24. 
    " |; D/ `2 V2 ]
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    ' N# d5 t! U( O6 w& p8 b( I
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    0 x) u, N: [8 c, e' E2 d
30. #include <asm/io.h>
    9 v6 Y* ^. b3 y% G8 w1 P
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    , `. F: h  v' F0 t. U/ p# ]
33. #include <linux/mm.h>
    8 n3 x$ J6 [% ?* g1 j
34. #include <linux/dma-mapping.h>
    " S+ E% E$ n/ L$ P# G
35. 
    ) B" ~- f# T0 w' B
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    & N! P  L2 P- F
40. 
    0 P5 R1 A4 j. a& e% H" Z! h' E
41. #undef EDMA3_DEBUG
    + g" J( X7 z  ^* a$ y
42. /*#define EDMA3_DEBUG*/
    7 D: D9 H( _' I+ `3 P3 R( x
43. 
    / ?* a% v) Q" _
44. #ifdef EDMA3_DEBUG
    , O7 x9 d' q# B8 m+ ?$ ~
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    0 e  o) e# z! ~, x
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    + R" R0 r) \3 T. R' |" Y
49. #define DMA_PRINTK( x... )
    8 l' v& h( F- R
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    * ^' E2 O/ g6 {9 v
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    7 E, D, H0 c. s# S. }- t4 o7 Q/ n
56. #define TCINTEN_SHIFT               20
    0 X9 d5 P/ s- J/ n: F' e6 Y
57. #define ITCINTEN_SHIFT              21
    7 ^; N6 y% Q1 H6 Z8 t9 Q% A7 m
58. #define TCCHEN_SHIFT                22
    $ f3 P; z; R" i6 k$ ]- J5 E
59. #define ITCCHEN_SHIFT               23
    
60. 
    * t) v3 R5 k+ X8 |- M# T; z- E; @
61. static volatile int irqraised1 = 0;
      v8 A5 Y1 L. Y7 X7 Z# J1 A3 c
62. static volatile int irqraised2 = 0;
    ) ?0 S4 c& c* M& X/ z; {( c4 G" t
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    5 s. V" j% J' X7 ?) G
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. 
    # |6 x4 ?3 I1 a7 X
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    0 n# @. o8 l2 P( e% x$ t+ E3 k
70. dma_addr_t dmaphysdest1 = 0;
    % _0 J- d. g$ o# m7 C2 q4 v% }' n( V5 n
71. dma_addr_t dmaphysdest2 = 0;
    8 Y: J( n  C; W& N
72. 
    6 l& `# Q; D* `: r
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    : l, O7 c/ M6 v6 P2 o) S: L4 i# {3 Q
75. char *dmabufdest1 = NULL;
    + N0 F1 I5 \" f" r# H1 N
76. char *dmabufdest2 = NULL;
    
77. 
    % |' n; a2 Y& F+ g# T
78. static int acnt = 512;
    
79. static int bcnt = 8;
    ! {% S! R3 }2 O. y! M4 N4 C/ d; R
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    5 B) T0 w$ C8 z& r  s4 k
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

; A8 ~& s( h) h! {! e( T; A) i      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。
% v8 m2 k" X% t1 J     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
( f, \& g, G! i$ A

/ J4 ~1 z$ }- R- F% w7 I9 `2 M) N