OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   9 R) V; O+ C. g/ u: H% x
4. *
   9 J' {0 V4 w! P$ l# O
5. * brief  EDMA3 Test Application
   ; V! j, t9 Z( O
6. *
   . F! S) |8 b' h4 H1 e
7. *   This file contains EDMA3 Test code.
   : i. ?7 f3 i) j# \8 E5 B  ]0 [: K# ^
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.
    1 K2 _: h  @3 k
12. *
    7 L6 ^  G# ?3 c, M  j- l
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    ; E$ r. o/ L7 i! O% M- |3 |0 \- f
15. * This program is free software; you can redistribute it and/or
    0 X. k8 R7 M, ^9 i/ t
16. * modify it under the terms of the GNU General Public License as
    + o( N# N9 H; C
17. * published by the Free Software Foundation version 2.
    - \9 E& ~0 Q2 c* ^' i+ |, O5 D
18. *
    ) U& c! C8 {. J9 D/ [
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    : b+ h6 c6 M. \7 S3 j/ Z
20. * kind, whether express or implied; without even the implied warranty
    $ j+ ^6 N* D2 [6 U, ?& W8 Z- d
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    " o7 p& ~/ C& Z* x: `; `
22. * GNU General Public License for more details.
    4 N. g$ S( B# z. ^' }
23. */
    
24. 
    3 f/ {. Q) \8 L" j  e# c
25. #include <linux/module.h>
    4 h3 W( C4 s; b' T. a
26. #include <linux/init.h>
    3 t% K0 I, V+ m! t1 ^9 a, @* A6 k
27. #include <linux/errno.h>
      w) u! G' b( ]
28. #include <linux/types.h>
    0 W7 {) s( B" d' u
29. #include <linux/interrupt.h>
    9 p6 t0 J6 L! g$ c
30. #include <asm/io.h>
    + D& }- x9 j' n7 W  z) w
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    1 }4 L# b0 y- }. Y/ r/ a
33. #include <linux/mm.h>
    " o- b1 s! Q, }% h& k) j8 Z
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    1 L/ S& Q; {% Z" ]
37. #include <mach/hardware.h>
    ! @1 J8 `6 S: ]
38. #include <mach/irqs.h>
    3 B$ J+ F" W  q, {  }: K
39. #include <asm/hardware/edma.h>
    . w8 L1 E. l' f3 I
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    + S3 n; L! `* g/ X& S
44. #ifdef EDMA3_DEBUG
    9 |; `6 f$ \1 X4 L
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    & l; ]9 S  c$ q2 y, p7 X
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    ' f6 O, q9 {. b9 m# Y! T6 V! G
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    ) l) J; s9 H7 m0 Z+ |! ]
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    ; C0 `. {& [) @: M2 v: h. \
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    1 b( a) h& d/ V; {3 ]
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    # S$ C* R& x$ [; b+ @
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);
    8 D+ |! [# `, o) |6 l& k
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ! o. [& L- `& D; j. t6 C# r
67. 
    # a) U9 G3 s4 ]) B1 T
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    / F  g7 L" v& h7 \
70. dma_addr_t dmaphysdest1 = 0;
    6 c3 C  W  M! I+ k; X
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    2 B1 W0 \. G8 v: f( E) q
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    ) ]# l, [8 s- s9 G" @
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    # l' ], r/ Z( k3 E6 G+ k
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    ! Y: U' i* A8 @& i' e& P
81. 
    
82. module_param(acnt, int, S_IRUGO);
    * C, e% N  K4 M5 z
83. module_param(bcnt, int, S_IRUGO);
    8 F6 \, X% R4 V+ M8 {
84. module_param(ccnt, int, S_IRUGO);

复制代码

& r7 s6 W. J! U' a: ^( U0 x8 ?! ?      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
9 e; Z4 D3 l' h6 y( v9 barm-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。
' k% @% s9 r" d4 z/ |4 b! k     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。


) G. h# o4 v, @