OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   ( u4 C1 Y  M/ z, z6 |$ o
2. /*
   0 f- [3 b8 \6 D" G$ f) v5 G  K
3. * edma_test.c
   
4. *
   4 g2 r2 H! n  I- U
5. * brief  EDMA3 Test Application
   
6. *
   9 E+ y- x+ F9 Z' |
7. *   This file contains EDMA3 Test code.
   $ o% z* v6 i3 g
8. *
   
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.
    ; [6 K* D/ W, E# |* x
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
      ]9 S' k0 D% h7 `+ D) d3 f+ t2 F. _
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.
    
18. *
    " x% J, X: k2 e/ c
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.
    
23. */
    , f' `( V# i# x6 t
24. 
    1 e( s+ n7 F7 u) N& t& X2 S
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    9 ?0 }, s& e* s, u; }+ E
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    5 E4 w: h, n+ A
29. #include <linux/interrupt.h>
    - ]1 V. h+ o) h. W0 R: R8 h: w" C+ h
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    2 W' \' Z7 H$ g6 s
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    ( A; a: N8 Z/ G8 e1 t
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
      c) j- @: {/ @( U  f1 h- T; n/ j
38. #include <mach/irqs.h>
    0 C6 g. ]' M3 @2 O
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    5 t" ?+ ?$ l3 \: g4 E  r5 L2 L/ P+ k
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    2 V% n: k' S9 P) ^! L: g( O
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    7 _1 O, _/ H5 D/ b* S
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    . z5 |- r6 z# |
48. #else
      L# r* P4 o" }0 D6 x) t
49. #define DMA_PRINTK( x... )
    " H! M0 C1 M: r) P
50. #define DMA_FN_IN
    ) m* U2 ]4 U& ]6 M; ]; L  W% ^& P" Z
51. #define DMA_FN_OUT
    / D- [  I# [2 u: d
52. #endif
    
53. 
    * \5 _* q" u7 f; l
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    0 l; K" i- P7 U5 F4 X. c9 A
56. #define TCINTEN_SHIFT               20
      U9 d& A+ t$ m0 H& T: n
57. #define ITCINTEN_SHIFT              21
    ! n" l3 w6 {4 a+ {
58. #define TCCHEN_SHIFT                22
    4 b7 V% e& {) a' I7 S4 A, D0 O3 o
59. #define ITCCHEN_SHIFT               23
    0 h/ e1 @/ q) U, t
60. 
    " z/ T; k! R. i
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    - X! |9 y$ o& v$ ?$ a
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);
    
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    8 r0 Q' v0 o0 v
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    : q% j  u: t2 g7 t
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    & l, P' X2 {# k. G0 o: \* }
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    ) i6 a0 }3 t  C7 D! O- {
77. 
    & }0 M( C. r! w% N  J% l
78. static int acnt = 512;
    - q9 A# B# U, y/ N4 L
79. static int bcnt = 8;
    / a  _" V7 }+ ~% X0 |9 H7 g
80. static int ccnt = 8;
    & h( m) H1 \" R( h
81. 
    # c; M3 v1 V4 ^( Y8 h
82. module_param(acnt, int, S_IRUGO);
    / o2 m2 W: e; g7 I, t$ J! E
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

1 c3 y  z0 p) o, s( H5 h; O0 A
, F1 o) v2 X* h' d& v      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
: @4 t: L. T+ C+ V6 Varm-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。
% W, B- v8 ?# e# V1 m* L     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
! l3 b% }6 Q6 r# ~