OMAPL138如何在Linux下使用EDMA3驱动

yyj

" P* s  Q  t2 A1 V" U* R: Q

1. [code]EDMA sample test application
   
2. /*
   . g% C+ ~, C4 f* J" q9 i
3. * edma_test.c
   : c- l0 i2 K1 Z- u' d3 e4 p
4. *
   ( T' e  f! _4 v8 p
5. * brief  EDMA3 Test Application
   
6. *
   2 e7 K% ]% ~' z6 g" }
7. *   This file contains EDMA3 Test code.
   
8. *
   3 `8 N- z  Q; L& K
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
     v3 G+ }! G9 k8 y: U) I1 q& A
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    6 g3 B; W6 E: |3 k( Z% u
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ; m* J0 J. i/ E
14. *
    5 ~! ?6 J. T; n. O
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
    ' Q& X, A  s) A/ q- g* q1 A6 Q( r$ w
17. * published by the Free Software Foundation version 2.
    
18. *
    8 s, R1 c; w3 A/ q) i( a  w
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    ! ^1 W7 G2 R# v. }& w! h$ s3 e
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    - f1 u4 e8 m$ T2 c/ l9 c! ^
22. * GNU General Public License for more details.
    ; B& ]9 H, r" a/ U5 t- Z5 q
23. */
    3 F& F# ]  I+ K& B, l. |
24. 
    . Z1 o* a& M0 L  `! j
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    " j) X$ \6 N$ `" a0 M# ]% z; Q
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    0 ?/ Z: k& D+ K$ [
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    9 H* k7 E2 T# P! c  b8 r& C& U2 p3 G
33. #include <linux/mm.h>
    $ C, s( K9 M* j  F( I( }
34. #include <linux/dma-mapping.h>
    . T+ u! g, y2 @, \2 [
35. 
    
36. #include <mach/memory.h>
    # [) ^  U9 R& h8 p5 r
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    , ]3 Z4 N  p" x1 \) g, r
39. #include <asm/hardware/edma.h>
    
40. 
    ! S  h$ _6 Q& j7 Q+ M0 H2 B( B
41. #undef EDMA3_DEBUG
    ; i$ \$ {/ c. Z: D7 ^% C- e! e4 F
42. /*#define EDMA3_DEBUG*/
    * i# g( a/ }) I$ ?
43. 
    
44. #ifdef EDMA3_DEBUG
    3 }% R, T, v2 p# _; y; K
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    # N2 N# H4 i6 D2 Z& c6 ~
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    + F/ a3 y, q) H4 U; D
48. #else
    8 l4 b: Y. z4 J6 f" _
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    ; u; G9 \9 C9 a4 l( @
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    7 K* t: j. E3 @: w/ h
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    . U* v  A: |+ h$ Z* ^" R. j
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    / c: i0 Q7 ^: D' X8 Y
62. static volatile int irqraised2 = 0;
    6 b$ g: i7 H' G5 H; \
63. 
    $ l# ]+ {! \! E$ f+ O9 y
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    - d* L* P1 X9 L$ f; n( b) p
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);
    : Y  N) f  e# P: `. y
67. 
    5 R9 j6 o* r/ U0 h4 y! p1 U
68. dma_addr_t dmaphyssrc1 = 0;
    $ H/ U+ w0 U2 A
69. dma_addr_t dmaphyssrc2 = 0;
    ( J  ]& h' [# P
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    8 J0 c7 S/ x+ ~' u
72. 
    6 k( [- r8 G5 |8 ?, ?
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    * |; O! B6 z4 B! z& K
76. char *dmabufdest2 = NULL;
    ; i. a: l; f5 b5 Z( x
77. 
    ( T# Q. h+ R; k. l2 R5 j9 d8 T9 f
78. static int acnt = 512;
    
79. static int bcnt = 8;
    . [' T  H0 {4 V1 U! N% |4 k8 ]
80. static int ccnt = 8;
    1 X6 t9 D, X" E! q9 ^; j, C4 L
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

* C+ Y6 z( Z, ^# x
/ C$ J% q$ e- m6 V" ~4 A: O6 N      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。
$ u% u; V0 Z- j9 }/ Z     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。


' E" e: R+ g7 x' p- u- k1 [