OMAPL138如何在Linux下使用EDMA3驱动

yyj

+ ~9 f; I4 o8 q

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   : c7 K# Q: x  k: |) k& L
4. *
   ) Q1 @8 {5 M( b) S1 x
5. * brief  EDMA3 Test Application
     }; g  f- ?! V. c, N4 t- x8 v
6. *
   - b- l! R8 u2 |# L; M" Z& X
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ) v$ B+ C( U+ Y% T% S8 }
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    , `, P1 P; N- b
11. *         TO CHANGE.
    
12. *
    1 g& V* `: x6 M( h' N, o
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    , W5 ^; u  n3 o4 `+ t4 F
15. * This program is free software; you can redistribute it and/or
    / C* m5 J$ p" Y! J9 \5 M
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    % ^  w( S5 E' \) |" n5 E  U1 c
18. *
    $ J9 n$ q4 A" Z* U; D
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    , P9 t& |2 {4 ?( s5 M
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. */
    
24. 
    / ?8 C  b  @4 \, [6 s8 Z
25. #include <linux/module.h>
    1 @( m, J5 o8 ~) u  _' E
26. #include <linux/init.h>
    , O6 Y, ^; Z% b: o8 x
27. #include <linux/errno.h>
    ' f  q) v8 C3 Q' t
28. #include <linux/types.h>
    % y& h! ]$ G1 N. c, z  P
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    $ S: a+ {/ v, Y$ y7 i- a; l
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    & t; n) Z% ~" x
34. #include <linux/dma-mapping.h>
    2 m3 {9 _% i  U# K5 Y/ w7 B
35. 
    2 |& o/ g5 U, ~/ K  s5 Y
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    1 c8 `* \( p. |# \# G
38. #include <mach/irqs.h>
    ; T0 O- ]: G  a+ Y* W
39. #include <asm/hardware/edma.h>
    4 B' R: [) m1 d* x: n& O
40. 
    ' b# r) P" P1 `1 `! o2 ]9 M; i. I
41. #undef EDMA3_DEBUG
    $ \* x( v: ?) W1 f
42. /*#define EDMA3_DEBUG*/
    
43. 
    # e. c, V% W8 ^$ e2 o6 ]+ L
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ; [! @4 H; m1 r
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    ' H/ W7 p. e& O+ y  Y+ B" A
49. #define DMA_PRINTK( x... )
    2 i* W: B9 U  |) m8 F
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    * m7 U/ m6 r8 O3 G5 Z9 W# Y& `
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    " O" J, o+ O5 K, Y
55. #define STATIC_SHIFT                3
    ) L$ n  T% G2 W5 l  v7 Y+ C2 p
56. #define TCINTEN_SHIFT               20
    ; k0 U3 a, y# G9 D. \
57. #define ITCINTEN_SHIFT              21
    0 f8 H! ^/ {9 v4 |1 X
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    & B  M3 Y) B# Z
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);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    2 O, n  s+ e9 c8 [- ], z
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    & k2 i+ h' H/ R2 N8 m
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    , j) x$ t, a1 ~: J4 L6 A9 V' |, N
72. 
    ( z: D0 j6 C- {" e
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
      r9 q5 T1 S8 a, e
76. char *dmabufdest2 = NULL;
    
77. 
    4 F" U' g# N! t* v
78. static int acnt = 512;
    
79. static int bcnt = 8;
    + q( M* Y% `9 y; E! u2 M
80. static int ccnt = 8;
    & [- v5 a- c8 ]6 i6 B% c
81. 
    
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' G- @" X+ \2 |" 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
1 J( g% e/ }- }: \5 J# y( Jarm-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。


( g8 Y: Q* y. l; }