OMAPL138如何在Linux下使用EDMA3驱动

yyj

; {1 H2 o: T- h/ k+ o; |

1. [code]EDMA sample test application
   
2. /*
   5 D! D  i( L; L* A/ ]  X
3. * edma_test.c
   ! T5 M: G! r. J" N' F/ c, l! C9 h
4. *
   . P( K4 f" e7 [/ S/ @7 t4 F. U! n
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   ; e  n* ~5 g2 I0 b2 P! @4 h" m# @5 ^) t
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ! P6 k: P, }9 `9 G: U
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    ' F5 t2 q+ f' o) `3 ~* z
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    / d! E+ |4 i' Y
16. * modify it under the terms of the GNU General Public License as
    9 ^! m4 h; C( ^
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    # y6 B& L! _- r: f# Y; M/ V( P6 D
20. * kind, whether express or implied; without even the implied warranty
    + X2 |  e" ^4 [2 u0 P$ k
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    + G% B- Y$ c- d) C# y3 X' d8 l
23. */
    7 M  T3 K& I( T* e; N" Z
24. 
    6 ^( U$ r* }) V4 X7 \* u# q, G. a
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    ' V( m# z' C/ L
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    9 w- Q9 V2 X2 g. h  D2 _6 A; z
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    & I, v3 w. A! ^5 a) [: z
33. #include <linux/mm.h>
    $ V0 E, I- A) Z! A% x" U5 F' f9 O
34. #include <linux/dma-mapping.h>
    6 R- K5 k3 e3 I8 D6 Y. Z
35. 
    . k9 o) h5 Z* y; H% i/ q
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    & |; G" u- c, O: R2 l5 O
39. #include <asm/hardware/edma.h>
    " s  p' a  `; `6 W
40. 
    % q$ P0 k: r  v( X" y
41. #undef EDMA3_DEBUG
    5 f+ F2 ^' O9 \" S* a0 F6 m
42. /*#define EDMA3_DEBUG*/
    
43. 
    . D; z$ l. h# g: T" T% w. l" |
44. #ifdef EDMA3_DEBUG
    4 S/ P, h" Q, m* `
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    5 Q1 M. H/ \, q  p% u
48. #else
    , e+ M% X  U7 i: {; g# l. j
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    ' O4 R) ~9 G1 G, c* Z* Y: k" g
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    $ t# f+ J0 c& S9 O9 q) W7 Z
60. 
    6 c+ S$ L1 ?3 _2 g
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    ' D6 [. {) k6 @4 @9 C& M& ^1 F
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    $ Q: K& p% w1 q; }8 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);
    " l8 D2 Y! p) y
67. 
    * E5 \$ n+ G# j+ a0 Y1 ]. L9 j
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    + k/ P7 s9 r' {6 R5 ^/ G" ^. ?
72. 
    
73. char *dmabufsrc1 = NULL;
    4 M& ^" @7 ?1 N2 N. @
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    ( c5 H+ r& |: u) @+ [! D
77. 
    * Y" b4 w+ `7 E1 J8 t" Z
78. static int acnt = 512;
    
79. static int bcnt = 8;
    " n. f; @7 }5 R# e* B2 y& S6 ?% d+ V
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    % Y- F) n( S+ ]) m$ t( V- ?5 @5 A
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

# {9 @& Z( r/ x3 _# m( Z
3 X: x, Y: b! B  w6 j! l      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
& P3 U2 a9 c. K7 Narm-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。
' G/ p% ~9 d! P( ^) t0 i2 [+ L* F     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

. W- e- C# t2 C' H2 k% Y