OMAPL138如何在Linux下使用EDMA3驱动

yyj

" K' c! I  T/ I  ^

1. [code]EDMA sample test application
   
2. /*
   + A* O2 d* p; Z$ h! R1 l1 l) G
3. * edma_test.c
   
4. *
   9 M! Z) h& l* u" J3 g! ]4 M+ F& r" C
5. * brief  EDMA3 Test Application
   9 `2 A6 m4 m/ p, Y
6. *
   2 }$ A3 G# n! F3 V
7. *   This file contains EDMA3 Test code.
   9 {2 k  k; I3 E( c& }3 t# T+ e
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
    * F6 i: J1 C' w4 w9 G/ I
11. *         TO CHANGE.
    
12. *
    0 j! ]# j0 k( f
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    / |; ]2 b2 P  S
14. *
    
15. * This program is free software; you can redistribute it and/or
    ) \+ T; B  M% c% a
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    . ]$ }+ r/ r' n1 S6 t4 {2 u, Y
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ! `0 g1 Y0 G$ J: `7 f) a
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. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    9 c& P. ]) J4 w- I7 U* p# A3 M
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    0 h' _. b' [. a! c  O+ ]  u" z$ ~# p
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    5 j9 t& _. I$ B
32. #include <linux/sysctl.h>
    " x3 S! F" J& ^0 `
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    7 F" Y% c: S% H& z2 u) e: H
36. #include <mach/memory.h>
    ' \! k& R9 X! E4 S+ d6 R) c
37. #include <mach/hardware.h>
    ; G$ B9 t$ N6 T9 W' l! c
38. #include <mach/irqs.h>
    9 @, o3 X$ c0 ?
39. #include <asm/hardware/edma.h>
    1 S% F- A& J. y. z
40. 
    
41. #undef EDMA3_DEBUG
    3 V% O/ U$ n0 B
42. /*#define EDMA3_DEBUG*/
    $ }6 @& H1 `. f4 Z; h
43. 
    ; q5 Z0 g& `& D& P# q' e  K: {
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    6 I# J- d# P) K9 X3 ?6 E# D& K5 {; Y
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    0 ~4 t1 U, x; r6 |
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    8 ?9 \- G. g. a2 O- o
51. #define DMA_FN_OUT
    6 p- H" w# j0 Q
52. #endif
    
53. 
    ) A9 e- O  X0 D, g5 g
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    " m  g! e. i3 j+ S1 S- j" u
57. #define ITCINTEN_SHIFT              21
    2 Y8 v8 r2 }  X' S' t  k: F
58. #define TCCHEN_SHIFT                22
    8 A" E8 |0 s- @8 E0 Y# D/ p% j. k
59. #define ITCCHEN_SHIFT               23
    8 r1 m6 Q0 X8 L! f
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    ) v7 B% W( u' P, R3 U
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);
    - ^: b' W; U2 ~9 Q4 ^
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ) o+ C- v8 |' T/ Z
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    & e9 i* n7 G" Z" G
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    7 u8 b) j* ]! k; x" a  a
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    ( p# M5 Q7 n' @2 C! e
75. char *dmabufdest1 = NULL;
    ( A& u3 X9 P" \4 C& I+ n1 e& p
76. char *dmabufdest2 = NULL;
    ! Y& S+ r; G0 C& C
77. 
    7 x1 c* n3 Q0 |
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    % c3 N, ?0 M, h. l' [* l
81. 
    
82. module_param(acnt, int, S_IRUGO);
    ) X3 r/ u3 ]9 J% f& ]0 o* w
83. module_param(bcnt, int, S_IRUGO);
    8 X$ y1 @( ?% c: R% {( d
84. module_param(ccnt, int, S_IRUGO);

复制代码

) @4 c# D6 d) j0 r1 m2 z      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。
- O* U6 k& t8 u* d8 T% ]     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
1 l5 _8 x5 @  Y3 z0 n6 x