OMAPL138如何在Linux下使用EDMA3驱动

yyj

% S7 y3 b+ U. C  H! `

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   : Y) E% ]& n% S# [
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   % R+ R- X. L! @4 t5 g5 z. F+ o9 q
8. *
   ( ^8 M: H* ~- z# U/ F
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
    
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    ! b6 n) R$ u) ^3 [/ R1 R- Q# m
15. * This program is free software; you can redistribute it and/or
    5 i$ l8 H+ z7 @' V3 H' |$ D& K
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    / Q( S. C% h" U) H' s
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
    - q2 L6 M& ^5 N' u" o) C) a
22. * GNU General Public License for more details.
    8 |' m/ v5 r" ]* c' X5 D' [7 s
23. */
    4 Q1 q8 [/ o/ j6 t  x7 x3 J( E
24. 
    + {& k1 ~1 X8 t2 T7 g) M5 O
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    ! j6 C/ ^( ~! v' @6 K
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    ' o- ^6 G' B, m: R4 G
30. #include <asm/io.h>
    ' C) q  G, `" \
31. #include <linux/moduleparam.h>
    ! E! d5 }3 u  A% R" j3 h0 `
32. #include <linux/sysctl.h>
    # u: e2 O1 L9 t+ R8 f: s
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    4 P) J/ v9 S7 b6 [3 d
35. 
    
36. #include <mach/memory.h>
    . M/ b; _3 F5 ]6 p6 Q
37. #include <mach/hardware.h>
    4 P- Y& @# \& N6 ?
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    ; ?4 R0 p% \9 c2 M
41. #undef EDMA3_DEBUG
    ) V; q% X3 }4 ]" m% A" V& t
42. /*#define EDMA3_DEBUG*/
    
43. 
    + p  A! R- E- q+ b- r
44. #ifdef EDMA3_DEBUG
    # b0 \2 F9 W0 v1 i0 Y
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    : |. s/ w6 x2 k% t/ i
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    # }; i; D0 b3 T+ W, Y4 ]
48. #else
    
49. #define DMA_PRINTK( x... )
    1 x- ]& X) J+ u& v9 _9 u
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    6 o/ ^! x! U* c' {
52. #endif
    
53. 
    % D7 e' R1 b: T- T: X7 d
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    : h' b" d) B2 U4 ]/ `1 k4 H
57. #define ITCINTEN_SHIFT              21
    0 O) j7 \- R. w  A
58. #define TCCHEN_SHIFT                22
    # N8 U1 U4 u) K/ `+ z
59. #define ITCCHEN_SHIFT               23
    9 \* ?  x" n' e! b) Y
60. 
    6 L2 Z) \- J. ~; Y$ h
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    / |& h1 F3 ^* h2 a5 M. s2 q
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    * v- Y. V$ B' R/ @) y7 @
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);
    $ t1 }) X! _, i
67. 
    % w, [/ O( o& l
68. dma_addr_t dmaphyssrc1 = 0;
    ( w5 g5 ^3 z* A' d, @# j' W, M  y
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    / J2 J, m' W" P% s: d: j
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    $ ~7 p  S3 e9 @- ]6 G' f
75. char *dmabufdest1 = NULL;
    ( k9 f. w- T4 I6 v
76. char *dmabufdest2 = NULL;
    0 a: ~$ }1 U/ Z: T" K' X
77. 
    , m% b( r* d7 R: {
78. static int acnt = 512;
    
79. static int bcnt = 8;
    / U3 X( [6 F& F) k
80. static int ccnt = 8;
    - M! p6 j- J" j+ n& u
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    4 w: C0 A* W6 H$ E5 ^: ]! W
84. module_param(ccnt, int, S_IRUGO);

复制代码

      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
, B5 J9 R$ o' }$ Y5 E8 W2 yarm-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- h: |: Q6 Y7 X     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

. ?$ R* D& q" o2 ^- R# g