OMAPL138如何在Linux下使用EDMA3驱动

yyj

# a; @3 ]1 E7 v9 k0 v

1. [code]EDMA sample test application
   
2. /*
   + p  S8 o, @5 @% ~) M
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   , r! N; z* a5 |  V; z2 ~3 m
6. *
   9 b, ^3 C. E) C" V
7. *   This file contains EDMA3 Test code.
   ' _9 A" a) }5 a& {; @
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   8 x9 W2 Z9 r4 q6 y
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    / y( h/ Q' ~4 m6 z
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    $ j; C" x% K7 N- D, e6 N
14. *
    
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
    2 ]+ ^+ A; ?' O: [) N$ F
17. * published by the Free Software Foundation version 2.
    8 M' w+ ~4 f  ?; H5 T9 ]! V" C
18. *
    . P- f3 ^7 b4 U! E# g6 k
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    9 [1 ?- \  U$ D0 d* H
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    & x9 K$ q  P8 ~9 j2 r* ~7 |, S
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    , ~5 A( {, d; _8 d. i! `+ e
27. #include <linux/errno.h>
    + Q6 J: S- G5 W! K5 P7 g% b+ M
28. #include <linux/types.h>
    0 p3 y' j. y1 r( ~
29. #include <linux/interrupt.h>
    ! c2 N! H% z9 W$ a0 Q8 `
30. #include <asm/io.h>
    + S5 h8 ]$ \9 ], c5 ~6 J- S! _
31. #include <linux/moduleparam.h>
    $ b0 r/ ^) T, K6 n( W
32. #include <linux/sysctl.h>
    ' s+ E+ v9 L6 V
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    & r  ?0 G. v& f6 {5 {5 n
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    3 }" r. @( A+ x, Y! X' p
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    * m1 b. F' U+ y! H
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    $ Q5 l/ K& y2 {4 m3 M2 C
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    " S3 A: \7 i" z! Y& S
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    - v, V8 C4 K1 ]1 ~) h2 p2 x" n
48. #else
    
49. #define DMA_PRINTK( x... )
    : w3 _( s) V) s/ G- Y7 q
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    0 a2 Y# ~* R4 F) n8 m1 s
52. #endif
    & Z, P) c/ E9 v. d8 v
53. 
    : [5 m1 S& u. u
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    ; ]( X$ Q8 x4 s' k3 l
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    6 @% s) d& Q! C0 @4 D
60. 
    % x! B& U3 ?- a: g6 `
61. static volatile int irqraised1 = 0;
    7 l; p- u' d5 {- K+ a& N! w% _
62. static volatile int irqraised2 = 0;
    + W& G+ i0 n8 z/ b+ Q
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    : _9 H+ O. V: k; i% H
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ! I& i  F. H! f+ l# A
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    3 R& K# [( t/ C! n) S/ I) b! |* L) {
67. 
    ' F: Z% q/ ^- T) m2 Q
68. dma_addr_t dmaphyssrc1 = 0;
    1 w& j7 N# V) @: C
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    , C( B" Y: w: N% ^) R
72. 
    : \# l5 P/ R0 N3 Q
73. char *dmabufsrc1 = NULL;
    / ^6 K3 w: t) R3 Q- S0 J8 I
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    " l2 _& P3 z9 C6 j8 W( |
77. 
    ' z" v5 h9 w2 @
78. static int acnt = 512;
    9 h/ d; e8 z% \8 E
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    4 @7 \0 X4 i; p& G0 h
81. 
    6 j5 D# l6 L+ v
82. module_param(acnt, int, S_IRUGO);
    " |! r0 A: f! p( h# }* [
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

. o4 r( N! N4 ?/ L; S) R4 u. x4 \
0 H9 s3 H) Y# P" A6 s$ Y      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
  f5 b3 k1 o- H$ r5 garm-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。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。


/ O1 \( J6 b: z