OMAPL138如何在Linux下使用EDMA3驱动

yyj

& T* P$ U7 l4 t0 G; L  A) V9 r8 a7 C

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   # q/ A8 `2 e  N4 d
4. *
   / F0 F& j. \# T6 s& g( g/ P5 K- b
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   8 z' i$ ~4 Q- e/ l
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.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ; F- f4 Y& O  C. C' q: ^/ n7 c
14. *
    " v) S: J. o" f. ], n
15. * This program is free software; you can redistribute it and/or
    8 e6 j& z4 V" e2 o* R
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    / m1 D/ E# Q+ N. r0 z& z: A
18. *
    - `, c! O9 c4 j) i* w5 q
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    ; N! c: a, H" P" z
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ; P$ u; p; L- V# q3 k/ N
22. * GNU General Public License for more details.
    4 X8 O3 L, I" ^4 ^, c4 i: T( |" u
23. */
    5 ^6 O+ G3 q1 }" V1 G3 y0 M2 o
24. 
    . B1 o; r$ a" K6 p
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    * ^) @1 y3 N- n7 U8 N, U
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    # S/ N: P$ H+ o7 J# s
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    9 A7 B+ \3 C* L5 `( }3 x' F2 o8 a
31. #include <linux/moduleparam.h>
    # g) j, e7 S/ y8 n
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    1 t( ~! s& H9 P" O5 L2 I
34. #include <linux/dma-mapping.h>
    
35. 
    4 e6 ^4 s, d+ y  k- S+ U6 b" I
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
      @0 w- \; h( {) }6 U
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    # C& L; d& r' d8 `4 ]4 k2 M
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    4 G& `7 w1 z, C) L) M& E
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    - T5 q" W1 Z5 _8 z0 c; y
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
      R- p/ \3 Y; J7 I1 i
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    * I, Z: q% z5 d3 L: s
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    4 {6 {/ t/ Y' U' I( X( P/ Y
51. #define DMA_FN_OUT
      F6 p1 e( n3 }. k/ m% X
52. #endif
    
53. 
    * O* V, a( J, u$ m# F: k( Y
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    1 j7 u) U. z8 l0 [0 ~- S6 U' Q% ^% k6 M
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
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);
    2 J1 }8 J! s8 D0 r& L
67. 
      S8 |! ~7 t: i0 t1 G( V' o
68. dma_addr_t dmaphyssrc1 = 0;
    ) ]+ F" a) h5 p5 [; S! M
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    $ T3 B1 B. E4 g4 [, t3 D% I
72. 
    
73. char *dmabufsrc1 = NULL;
    2 G' m# J% T" C# z" [* \# e
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    . [; w5 G4 [- R( g
76. char *dmabufdest2 = NULL;
    4 X2 ^5 O" L2 `0 t* e2 q
77. 
    , {7 {0 g4 l0 U3 T% ?
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    , F9 ?- Z' L% P4 u# h% [$ X
81. 
    
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

7 d/ q6 H1 k: I! `& M, t! W! ~
      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
) p, q3 v( m' Karm-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。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

% C, W- ^( h4 n  x3 k