OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   ! }% T1 n) h6 \8 t( C! ^
2. /*
   
3. * edma_test.c
   ; y" q2 Y9 o" {: ?9 ^( `! }# h/ |
4. *
   8 H3 v! [0 [8 p7 h* M2 G8 E
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   $ ^# h3 O" g- R- }% S9 @" z. E$ p
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   , n0 v- Y4 K" [
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    % o+ v9 |8 f( t6 B2 U
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    " B. F, m/ W& {, h
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    4 z+ C4 M' ?2 i( r0 Y
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    - I$ W- p) P7 P. o& l+ Y
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    + B6 v2 {" a0 U5 m" w
22. * GNU General Public License for more details.
    
23. */
    2 q, ^. R5 X$ x% h6 v* f# W
24. 
    ( ?  |3 N. E7 R9 A4 e
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    & c2 N9 A+ K) @# m% r
28. #include <linux/types.h>
    9 I; T3 V  b4 H" K, }, G  S2 P
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    ( e% [6 d% U. U' n% Y
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    0 r1 l8 g  ^8 }* r  T& h
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    4 x: ]8 r0 q0 G: m/ ]$ \2 i' l
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    , @+ i) j- F: O4 A) A- W' U
39. #include <asm/hardware/edma.h>
    ' D; s) m* j% f" M) R( g
40. 
    
41. #undef EDMA3_DEBUG
    , ^1 c/ x0 O, H+ b+ D* ?
42. /*#define EDMA3_DEBUG*/
    5 a9 e( f( {& V+ V& S( H
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    8 r6 ?! \( _4 [9 U: {0 K! U/ Q- X
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
      t+ F& U5 V' ~, L% o2 P
48. #else
    
49. #define DMA_PRINTK( x... )
    $ L% q8 r' L6 v, C9 y
50. #define DMA_FN_IN
    6 G- H6 F- t' p' i0 j0 S7 `9 G! o
51. #define DMA_FN_OUT
      W* n* i4 k& D, n0 B
52. #endif
    5 l, \+ _0 c5 G+ {, s; N: t) g
53. 
    2 l6 o3 u. ]( e6 M7 a
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    $ a7 E1 f7 I' W7 K
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    $ A8 B. Y% i4 {) Z( ]% z3 M! I- _& ^5 [
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    8 g( @: M7 u9 |7 g
59. #define ITCCHEN_SHIFT               23
    
60. 
    3 Q+ x- L/ R) A
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    " ~8 i+ X# G, K, H1 k* ?7 j
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    # s# w# P, P5 K2 m7 K
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);
    
67. 
    # v6 i' h$ v: i9 Q0 y- @7 c6 r
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    1 I$ c5 `5 M' M0 f1 D. G
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    . A) e# ?, C' i( Q
73. char *dmabufsrc1 = NULL;
    & s- s5 i. D( t4 l3 M
74. char *dmabufsrc2 = NULL;
    # z$ u$ K! C$ L
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    & p! l" s8 a8 W
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    : h! S. \  G  B  {$ s
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    7 W4 V+ H6 a3 G
84. module_param(ccnt, int, S_IRUGO);

复制代码

5 s4 q$ _) [9 G3 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
% K# c3 F/ O5 l$ }& _+ Barm-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。
& V* [8 Q% |# A+ _     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

% ^9 k1 E$ C/ d" e, m: @4 u
2 S" y  x; X+ _( q3 t. D6 z1 r