OMAPL138如何在Linux下使用EDMA3驱动

yyj

# ~4 F6 d. C( x6 u! K% ]4 D

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   2 B0 h, k3 L2 d- D
5. * brief  EDMA3 Test Application
   . L# J+ T7 L0 a' `
6. *
   
7. *   This file contains EDMA3 Test code.
   
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
    , M: _# G. _0 D1 I" ?* I
11. *         TO CHANGE.
    7 G; B5 q# B2 E; B4 i3 q
12. *
    : L) g  N7 B0 \7 {" O8 K! M0 B9 c
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    7 B. c+ |$ {- ^" ]- b" r; ~
14. *
    # Y7 O4 ?6 S% {4 X$ q1 d. B
15. * This program is free software; you can redistribute it and/or
    9 Q: @2 Y5 r% x1 q' \& e
16. * modify it under the terms of the GNU General Public License as
    $ y) k! N2 T  Q1 {: G
17. * published by the Free Software Foundation version 2.
    
18. *
    % ~$ u. p/ F: Q
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    % v: h8 H; W9 K* H  E0 i
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    
24. 
    0 |( k, ~& P- S2 ]6 m
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    8 N* y4 v8 m  W; L. G, B
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    4 Y7 v. J6 r2 S
33. #include <linux/mm.h>
    % `  W& ^' m1 z3 X
34. #include <linux/dma-mapping.h>
    3 J6 y4 n3 ]# O0 ^, T7 d
35. 
    - m# P6 E/ s* M6 T. X1 X
36. #include <mach/memory.h>
    : U& w: L/ x9 x& f) A  M' g
37. #include <mach/hardware.h>
    8 @! T2 ~# A3 z, Y. v: x
38. #include <mach/irqs.h>
    3 }1 `) G3 H1 f7 d1 X" _
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    ' S! ]4 a$ z% k- l8 {( I1 i
42. /*#define EDMA3_DEBUG*/
    ' T2 \5 f3 j+ D" o; E! R
43. 
    , C2 v8 L' z' \) P3 n
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    0 t8 R- g  c  a7 x
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    8 d0 A6 E3 U9 S8 u$ o3 k
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    " A1 N& }2 }! t! j- [: V
48. #else
    
49. #define DMA_PRINTK( x... )
    , B0 \( X) F" ?5 ^2 g
50. #define DMA_FN_IN
    " @' ?; w% U: ?" R
51. #define DMA_FN_OUT
    
52. #endif
    + b! ]* M* b! l
53. 
    6 m- Y. u3 Z7 w9 ]0 \1 v2 X, \% g
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    ) H! o0 J+ Q8 B6 \2 S
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    ' M  j3 ?( N6 n+ D5 g2 v
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    " b1 e6 K, c6 a# P
60. 
    . G3 s. y, u8 H/ a) J6 Y( @
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    + `* E! ~! z; r( f! E& @
63. 
    ! z9 m1 X( W/ u% I  I) k# t3 o
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);
    5 p8 ~) f( N/ k1 a- l7 U
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    0 R$ F  k0 S- e' s
67. 
    0 \! d; w3 l9 j+ E
68. dma_addr_t dmaphyssrc1 = 0;
    $ R5 }8 i' G5 k: @" S! i
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    * R! J5 p/ W1 O% v  W
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    $ L+ ]5 E* y6 ?2 w1 S# r8 h
73. char *dmabufsrc1 = NULL;
    + R1 O7 }' B5 |! G2 b0 X. \
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    ' z& c8 G) M4 S; R
77. 
    
78. static int acnt = 512;
    6 C4 Z; v6 Q: @" [
79. static int bcnt = 8;
    & u! Q/ p+ ]% S0 h' u; T9 l
80. static int ccnt = 8;
    ( B& w5 e$ d: t9 u8 J
81. 
    + f! P; `9 ?( {) ]) T0 l' e8 L
82. module_param(acnt, int, S_IRUGO);
    9 T9 h& C* v4 W1 B
83. module_param(bcnt, int, S_IRUGO);
    , {; E2 |+ O' C, X, h4 a5 s( B
84. module_param(ccnt, int, S_IRUGO);

复制代码

1 [$ j$ H7 {1 S* r0 I7 u9 g      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。
( L2 m$ b" V4 f# z( D     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
* {- u% m& F  a# A# i+ L, X
3 i+ n4 k# k4 T; d+ A3 ]