OMAPL138如何在Linux下使用EDMA3驱动

yyj

( J' G) X4 r- [3 `; M* V

1. [code]EDMA sample test application
   
2. /*
   " d: J& J$ A- G* M( X
3. * edma_test.c
   
4. *
   " K: o7 w. I1 {! E3 N9 E
5. * brief  EDMA3 Test Application
   3 {& x9 F. X: u: O7 N! d$ w3 p4 p/ ~: M
6. *
   / t+ D! ~! K& P7 c2 I  Q% K
7. *   This file contains EDMA3 Test code.
   & Z% M- T# n0 E! u
8. *
   . V/ ~1 L2 E  ?" T: y: }0 x8 n9 x
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   / E/ s1 J/ F9 k( T2 j/ T3 {
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    * l( _3 K  x: V, M/ T
12. *
    2 u$ |4 d- @: O& a2 r$ ]
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    : |4 L4 j! ?6 a0 o' V
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. *
    $ P" t) Y7 e% s) q
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ! E9 U6 A5 q+ w- v9 R
20. * kind, whether express or implied; without even the implied warranty
    2 q! A2 c# x% @* k: A' ~" b5 z! G4 B6 D
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    3 X# q9 R- q4 i1 N
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    ' e! q4 ~' Y/ h0 t9 ^
27. #include <linux/errno.h>
    2 }( M9 j5 h5 J9 F9 ?. P$ t
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    - k' z' b8 C  i* d5 K' I# A
32. #include <linux/sysctl.h>
    6 G5 `( W7 K1 W1 Y8 r7 b6 \3 Q0 w5 R
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    5 _; K+ W6 j& l7 H6 D! D
35. 
    : A; M  h" r5 z" D4 ^7 P4 f
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    7 J- `, }) |/ R7 U) K  }
38. #include <mach/irqs.h>
      P7 y( ]1 }. a4 r; c9 [! x: e
39. #include <asm/hardware/edma.h>
    
40. 
    * v. ^) U5 E  L% g! ?
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    ) `; n; I5 k, d
43. 
    2 t9 ?! ~9 |& _' V0 r' y
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__)
    ) x6 N. Y) u7 d1 X( `
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    & [' e9 W! m; `; K
48. #else
    
49. #define DMA_PRINTK( x... )
    . ~* t$ s  ?* k% S8 A4 x
50. #define DMA_FN_IN
    4 U$ B0 z0 U/ |/ C5 n2 e
51. #define DMA_FN_OUT
    7 b. b. s' |1 o  f) j6 G$ x) |6 p7 l- C
52. #endif
    / a4 `$ s. Y2 X8 c
53. 
    ; p; ]& y' `$ O3 N+ Q# d* o
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
      q" N3 B7 f1 r% `; }: }! ?' ~  {
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    % J2 M# ~2 n" a
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    : W- _3 M  z' d5 Q
61. static volatile int irqraised1 = 0;
      U; c4 F2 S4 R$ t
62. static volatile int irqraised2 = 0;
    ( g% E% w; X+ k* C
63. 
    # N6 k6 b" s5 m
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ) X. f$ v! }5 W0 I1 d* i
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;
    
69. dma_addr_t dmaphyssrc2 = 0;
      K) L$ a+ Z0 i3 m6 a- g
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    # ^* [7 n7 o- d' w; \& A: b" _
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    ' _! u1 m+ `4 C/ Z  U- r
75. char *dmabufdest1 = NULL;
    + z" l8 ]+ o! X* E. v
76. char *dmabufdest2 = NULL;
    % [/ Z# h. {! q9 u  v9 {
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    2 w+ N: [! ^+ _4 @1 j. l" R
80. static int ccnt = 8;
    
81. 
    5 L) r3 Y- ~( B- _
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

: o" b+ Q' `& E9 r& h9 _
      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。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。


' a0 c) ~7 h  u0 Y+ p( e9 c) e& e