OMAPL138如何在Linux下使用EDMA3驱动

yyj

8 \3 J: z" g9 X, o  Y3 i

1. [code]EDMA sample test application
   
2. /*
     E% d$ {% E* Y0 s9 ?" q" ]
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   " x) ^5 R/ g3 ^  r
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
    
11. *         TO CHANGE.
      b9 }8 ~" p! I  C4 G& _! g& j
12. *
    + Z( z0 U$ N, w" U8 K% d& P
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    4 L. E3 T  J" G
14. *
    
15. * This program is free software; you can redistribute it and/or
    5 w3 Q% X6 F5 m% v' o" c2 E% x4 G
16. * modify it under the terms of the GNU General Public License as
    ; C4 [: s. H8 Z* ^
17. * published by the Free Software Foundation version 2.
    
18. *
    ; }0 R% b6 D3 I
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    8 M2 b. s" [# P( Z0 W
20. * kind, whether express or implied; without even the implied warranty
    ) K5 Q/ v# c, y, e3 _+ d  z
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    
24. 
    0 b% n. d, t7 }7 ?: L
25. #include <linux/module.h>
    7 _( T' z. }% Q% t( B6 i
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    , a/ {" x& w, Q: K3 ~
29. #include <linux/interrupt.h>
    $ y/ \4 y% L7 T" U7 E0 a: s
30. #include <asm/io.h>
    9 m: N. ^2 y! N! u0 i
31. #include <linux/moduleparam.h>
    5 b4 o- o) X1 P5 o
32. #include <linux/sysctl.h>
    " z5 W) i- D! i: U* ^
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    0 E+ R6 G2 e) `4 G/ N
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    ' T9 ?; P. |1 g6 B8 h
40. 
    0 y& m$ ?9 k$ p. N2 e# W/ x
41. #undef EDMA3_DEBUG
    & k( t5 f2 T0 c, b# ~! J
42. /*#define EDMA3_DEBUG*/
    
43. 
    / Z; n- a; f& t% w2 k) D: U( s. e
44. #ifdef EDMA3_DEBUG
    4 R+ D9 G7 u. ]4 F  f- S+ u
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    5 H/ m5 S7 R* O, g( Y
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    , F8 y$ k% S7 p) `
52. #endif
    , r* [. [$ @3 N4 a2 ^5 L
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    1 n" t8 u) w# K: }6 H7 T# Q; j
57. #define ITCINTEN_SHIFT              21
    - U8 s6 G0 k, |
58. #define TCCHEN_SHIFT                22
    ! a: k. g+ r0 s$ y
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    ; |: \9 g& w/ g
62. static volatile int irqraised2 = 0;
    6 ~9 M" r& d2 ~# I, Q, J8 J
63. 
    9 Y& ^  G5 E5 `  {9 T% d, a) c
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);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ; f# G  Y8 B/ z8 j) P; A6 l; _/ j
67. 
    % {* o& L) ^& v. U) h
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    4 q2 a9 j5 J& l( N
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    9 q% F: {* c3 t- g/ T
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    ( o  A, T2 G& @3 F* x% x1 Y
77. 
    
78. static int acnt = 512;
    % A/ D3 f3 R1 ~8 k1 e
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    7 L1 ]( f1 R% |$ @- Z" z7 v
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

' _4 K* n! F9 Q! W! R% A      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
5 I! M7 Y8 K1 S& jarm-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。
1 M( n: N! ?2 x5 C
# m1 l1 J- a4 q) m" m- z+ A1 ~& h% t
% u( y# l7 `' O' t