OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   & H/ k1 a3 K- i5 E5 K/ y9 ]: }
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   6 S% H0 F  z& A. J4 V! y: J
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   2 e" F  k0 D! Y4 G' G  Z
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    $ L1 ~1 H2 Q0 r& q$ |2 R5 R4 g
11. *         TO CHANGE.
    # I8 j3 a7 j9 I# b2 c5 q
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    8 S8 R& U" Y0 s, I9 _+ V
14. *
    5 ?* O! s. N, n4 y! {6 _& k2 d) e
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
    1 O8 w! j5 R2 e5 a& ]( d) I
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ; {- R- \" b; F( n7 m5 |* @
20. * kind, whether express or implied; without even the implied warranty
    + d0 Q( R0 l. b$ |, }# c
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ! m6 B" G- i* H: `8 r: L
22. * GNU General Public License for more details.
    % I; K! j0 u9 I, @$ U
23. */
    
24. 
    % }+ V. |! R* L' O
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    : l: s2 h5 ~% i
27. #include <linux/errno.h>
    3 J& w% N1 H- x3 O' L3 r0 G
28. #include <linux/types.h>
    * Z8 S, @4 B4 {' A
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    % \. e' a3 V' s7 ~7 e" d- I- e
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    * F$ V# ]3 X/ z7 x! X4 ~. |
34. #include <linux/dma-mapping.h>
    ) s9 i9 M" {1 y8 ^* n
35. 
    ( ^7 O/ k( L+ d5 H$ l8 U
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    ; D, ?( v- w( `' x
44. #ifdef EDMA3_DEBUG
    " Z) J2 y' Z7 N
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ) s9 u* @* f; X* l( |0 p
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    3 v2 s8 X) P5 H) T
50. #define DMA_FN_IN
    , t. i7 ?" h( b8 @9 _" ]3 Z! a! Z% S; C% [
51. #define DMA_FN_OUT
    
52. #endif
    5 x+ _& B. z( |# o! W: Z
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    ! I4 C* g9 m7 r* g2 }+ H
57. #define ITCINTEN_SHIFT              21
    . P4 n% F  x; x% u8 r2 b6 c
58. #define TCCHEN_SHIFT                22
    ; c7 ]  U9 F5 P/ r# u6 s+ n7 l6 q$ M
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    # }/ _) i  {9 y( {0 [
62. static volatile int irqraised2 = 0;
    / ?; N2 _: c( g/ \. i8 v
63. 
    ' P# F, [$ D/ X* s! K
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ( K% ~: K3 \% m
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    5 L" v2 ^4 V  t6 y
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    3 j7 i+ ~9 [5 d9 z* @
67. 
    " R2 P1 f" z) S* d- W
68. dma_addr_t dmaphyssrc1 = 0;
    " p$ \8 ~- o  N7 S- B6 `
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    ' f7 ]+ E1 v, i; G: W0 W' {
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    ( i4 m' ~6 p( ]% |# U5 K7 ?
74. char *dmabufsrc2 = NULL;
    / U0 c3 U  l+ o. b4 a& A) g) {
75. char *dmabufdest1 = NULL;
    - Q, Z' Y' H. u6 |- t
76. char *dmabufdest2 = NULL;
    9 {( o5 X! c1 S0 q' R' _
77. 
    ( i$ W, y5 K2 _9 G
78. static int acnt = 512;
    % Z4 _' U" w9 `9 ~+ d9 b2 t
79. static int bcnt = 8;
    3 [+ B  o, q3 M7 v9 z
80. static int ccnt = 8;
    5 D# p: U* }; T2 r( U- _, _
81. 
    % L$ m: a, @% h' i" C
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    
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
4 o* H+ ^7 p2 Y6 warm-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。
6 W$ J0 `4 z, m- Q0 ~! v     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
5 P5 Z- |. D3 p4 l
1 I- |  r6 Q3 X4 y
! S: X' e: B" d/ ?9 Q6 F5 s; b