OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   & W- k6 k$ M4 h$ ^0 S+ w
3. * edma_test.c
   2 _6 V2 x, C9 T5 p, a& g$ d; ~1 H
4. *
   8 ?( |+ N3 G4 F/ A0 l( {
5. * brief  EDMA3 Test Application
   ) t+ r+ z- D' T. d; Y
6. *
   
7. *   This file contains EDMA3 Test code.
   + v( b, K) {. l/ t/ R
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   # q5 w3 m8 Z; f
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
      q8 s, j: p  `! t, C+ P
11. *         TO CHANGE.
    , L: S5 ^) b1 [. R
12. *
    $ c4 p5 q5 O6 O, a) K/ Y4 Z0 |3 q. m
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    3 S0 k: M7 f" t. h$ Q) C& [+ U1 ~  F. R
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.
    - s+ E* o4 Y5 ^/ l7 z8 x, P4 q7 [# i
18. *
    ) D) h( f* K/ F1 c9 N; c3 S
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
    $ j+ _$ t- ^. X. Z% R% N4 Z
22. * GNU General Public License for more details.
    
23. */
    0 T8 S' ~. P* e- _
24. 
    9 C: v, z5 Q/ h
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    , x7 M3 M7 N+ @* k8 F3 j4 g
27. #include <linux/errno.h>
    & ?, `/ r% I. ?1 G$ N
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    3 n: p1 E* ?( w: G5 V% d" i( p
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    , P; d  ?, O9 D2 I2 U) U
32. #include <linux/sysctl.h>
    + \0 M( {/ o) B5 v, D% i$ `
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    0 ~( }" n5 B3 k, |5 d! i
37. #include <mach/hardware.h>
    0 Q# }- Q5 P% A1 O2 A: k
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    9 x; V9 v2 q8 y
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    3 |7 ]6 Q( K, z9 _& J
43. 
    6 l6 Q$ z* X, E. a$ a1 L1 d
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
      {" _& U# H0 D' F/ o9 E: G# c2 I
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
      }5 d- h9 T+ q/ p5 p
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    # M% b( k2 [  t3 u$ j4 ?
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    1 w2 R) g- S4 g/ r; F( m
52. #endif
    $ E  B+ h2 W4 E* A4 s; q; T
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    . g1 u4 g) F; T' Y5 w7 g1 g+ T% d; S
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    6 K/ R  w/ v0 {: F
57. #define ITCINTEN_SHIFT              21
    5 B* O# h2 p: s+ }
58. #define TCCHEN_SHIFT                22
    6 E% }! Q; C0 r  A: z" w  \7 S' }: Q
59. #define ITCCHEN_SHIFT               23
    
60. 
    & Q1 T& O, ^! @5 H; g' Q
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    6 i0 q( _/ V% T
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ( ^: N4 o2 G* }! v' S3 k! D
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 c0 H* g# T# e4 k+ u1 P
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    + d! @' R' ^& @3 T5 v+ Q" x
72. 
    1 r# e- J$ z- f1 f; H
73. char *dmabufsrc1 = NULL;
    ( g: s, s/ w  S/ v" f& ]1 `& G2 W" X
74. char *dmabufsrc2 = NULL;
    $ {# }& f9 a- l7 w$ e% L* D
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    , Q0 T, Y7 @2 `: h' I% {
77. 
    : q/ E/ m( ]: ?
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    ' ?+ y/ n4 [+ |  H
81. 
    2 ~  N- |  r# m0 V
82. module_param(acnt, int, S_IRUGO);
    4 T# C$ \' r" V9 t3 G
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

2 w& t# Q( m& C. `0 s, x4 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
) B1 B; k1 f& e: ]0 `3 Farm-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。
% M& I2 H. Z: \$ ?% @% S6 S     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
+ e. ?+ h4 [! Z0 g0 B1 s/ b6 q6 M

0 q6 H1 R8 w1 r6 w