OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   ; t6 L, a  Q( z$ \) n6 {! @
2. /*
     H# X4 R1 E) X1 U
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   & Q! b' J, S. j2 H0 g. w2 \$ l6 G6 g
8. *
   : K; U1 B" ~+ B# W$ d8 G
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   : V/ \0 s1 V5 Y- E0 R  j* c
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
      L! \+ R5 W3 W! C8 |& U
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    & ]$ C, K- h- o
14. *
    
15. * This program is free software; you can redistribute it and/or
    4 t8 S+ W# g, H$ T( S
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ' t) ?- ^  m6 y% ^8 T
20. * kind, whether express or implied; without even the implied warranty
    / c; z5 ~( y  }6 w* q2 E: R) Z# z7 N
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    * r3 p. F; b" g" F& Y6 ?  s9 {
22. * GNU General Public License for more details.
    : l0 h7 g9 M8 M  K8 R! v
23. */
    . m$ c# n  i$ x
24. 
    
25. #include <linux/module.h>
    3 }  e  n; b$ m1 ]2 [* K
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    5 u# F' p2 q1 u# _* ~2 J
28. #include <linux/types.h>
    % H7 M* {( A" k3 y% ?3 E9 v  C
29. #include <linux/interrupt.h>
    5 [9 B* ]) H2 W2 g2 {
30. #include <asm/io.h>
      c6 h+ Q( V9 [8 R$ l
31. #include <linux/moduleparam.h>
    4 Z( U( V5 m% P2 ~$ Y5 }
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    6 A0 v: d5 B8 w: n- O
37. #include <mach/hardware.h>
    6 h% I  Z; x9 g3 h, V6 {
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    4 @0 N: `' z8 P- x
40. 
    + Q) c) i- @. o$ h; J
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    ; n% f. V7 A1 {' t
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    & g3 _( e1 i, r% A) a& }( d) G6 f
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    2 m: ], o0 O" {4 }& v
48. #else
    $ P2 g2 M2 j7 P3 I% y
49. #define DMA_PRINTK( x... )
    $ f% G, ~- H6 h3 P7 A
50. #define DMA_FN_IN
    % J0 K+ M4 r( P; {. T! D
51. #define DMA_FN_OUT
      W, u4 |  l. T* G
52. #endif
    ! m$ L' l5 f( Q- O5 E5 o
53. 
    8 F: Y& g6 V9 v6 {6 T2 p% v
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    ( Y* i- @0 F, _% I, P* ]
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    7 d* L: n# W3 X! a+ c, Y
58. #define TCCHEN_SHIFT                22
    7 n2 y+ t/ N5 w' N7 C/ m" }- P
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    % _& W9 G6 t& q( w
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);
    / x8 R0 ]& C% L) m9 ]: A
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ! V: J6 |6 S% O: m; P
67. 
      _$ U# J! q/ O* b: X- u( N
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
      F, F  _+ V- `/ Y
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    $ ^+ h( o" Y( ?$ C9 j# u
74. char *dmabufsrc2 = NULL;
    , U6 w0 ]8 B) o! ?/ S
75. char *dmabufdest1 = NULL;
    . A9 c+ e/ o% Y/ M
76. char *dmabufdest2 = NULL;
    - ?8 _, T8 t7 R  q) q8 S' Y  R
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    6 Y8 v' I3 |* l+ d5 r. }
80. static int ccnt = 8;
    # B' o+ q$ G+ Q$ @4 K1 }3 L, L/ D! c
81. 
    ) f& k  l7 L8 H" x/ _, U; @/ p# f
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

) B- O" v8 \; M) \
      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
" e# _3 v9 E7 i5 A" e1 Z1 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。
. f/ J2 H' s8 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。
5 F3 `, t) _. R1 X4 d: N* s; j. W
  E7 L: i  Y0 k0 |
" G# f$ k' x# g" W* w; Z