OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   # F; ]! D4 B$ H3 E/ y! W$ Z2 i
2. /*
   + Y' t6 s, O6 @0 A. H7 v. I5 [/ z
3. * edma_test.c
   
4. *
   : I9 E6 n" B, d2 [3 M
5. * brief  EDMA3 Test Application
   . H- E5 h' M: ^4 W
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   6 N7 ?. C, h" A8 y; z
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    $ p& }, B/ T# d* {4 s$ J# q4 q
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    # s% n* ]$ w% q; l: Q4 I
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
    
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    8 G, R. _$ i/ q' K, [* e8 N
22. * GNU General Public License for more details.
    
23. */
    
24. 
    ! `; ]( q  O6 h% L2 N# M* k. I9 a
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    5 X& z/ @4 V3 e0 ]4 n7 x" G" k
28. #include <linux/types.h>
    % j2 j! Y* C6 _3 u0 ~
29. #include <linux/interrupt.h>
    4 e5 q' @6 M3 [" N/ F' M, ?
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    / p0 \' A3 e7 I% u$ T) l8 J
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    8 G- |: g# v# W: m
44. #ifdef EDMA3_DEBUG
    ) w) f( C% f; L0 j
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    / B0 l* i: P' I0 ]
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
    7 k( E2 H7 H! ?
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    ! e) t* e* H* l; j
51. #define DMA_FN_OUT
    3 l- J4 V0 }6 `( K- M+ [5 b1 I
52. #endif
    8 l" b0 r5 V+ D& F" n/ p
53. 
    " S# m# M; @2 m& b( E" O
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    / O1 Z1 Q2 ]/ W  Q& Q4 [
55. #define STATIC_SHIFT                3
    ( Y2 z1 n1 R9 Z" A: H
56. #define TCINTEN_SHIFT               20
    ) Z) Z$ [& p% F* m" m
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    . f6 |. N: v+ k: F! ?! y: X1 V5 E
60. 
    / o* m! F; C5 J. {
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    + ?7 W" }7 z$ S$ U% L; Z0 E, h: b
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    * G) W1 u# n  n; @9 Q
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    8 q. p( B1 U- J5 ]2 q/ j* j# @, @
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    . p# @+ ^9 ]8 S$ Y# N
67. 
    " o1 [* O; s4 \2 l
68. dma_addr_t dmaphyssrc1 = 0;
    7 ]1 d" ^; {0 \/ f( M6 e! {
69. dma_addr_t dmaphyssrc2 = 0;
    - O: E; i' r9 p" O; R. x# b
70. dma_addr_t dmaphysdest1 = 0;
    / S  `$ D  C8 M! F" C3 h
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    7 _6 I' i5 c5 S
75. char *dmabufdest1 = NULL;
    : C! n. |/ |. M" G) F& u
76. char *dmabufdest2 = NULL;
    
77. 
    6 j4 K( X; \4 w  m
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    9 v; \  p  O6 _( T+ U1 k5 ]" o4 W! r) x+ _
81. 
    
82. module_param(acnt, int, S_IRUGO);
    ; q* ], P1 d/ c4 o4 E
83. module_param(bcnt, int, S_IRUGO);
    ; E; x# C6 `+ ]  L" w& T
84. module_param(ccnt, int, S_IRUGO);

复制代码

- Q* ^! J9 e- E2 o. J8 S3 H" r      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
$ |0 z7 z8 \2 m% i$ l6 E, c7 o2 W7 qarm-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。
6 a7 E3 w" p2 C" I5 m; Z7 o, ]     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

: Z7 U1 m3 ~: m. X
' t, T+ G" C& r3 X* d+ D