OMAPL138如何在Linux下使用EDMA3驱动

yyj

+ h# }5 T/ _! T' M7 ]/ Q2 V

1. [code]EDMA sample test application
   
2. /*
   ' p: x5 _' }  M- V! k
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   8 F5 _; M5 w& E7 m
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   0 I* N$ ]# [7 ^% O) A' T
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
    # u0 s1 I/ a' w$ F$ f4 O( B$ i
11. *         TO CHANGE.
    " W: O8 j" ^+ o0 Z' h& ^; V
12. *
    2 X# q+ D+ b) I$ C8 m
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    + x: K" ?6 D3 I
16. * modify it under the terms of the GNU General Public License as
    & _# _" |, M7 P9 k1 _& i! {8 F! n6 ]
17. * published by the Free Software Foundation version 2.
    
18. *
    . q8 G- {6 B7 `, k! B
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ; W5 H3 G* A. ^) N" U4 m4 o! f
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>
    ; ]% ]1 |- K5 Z5 G
26. #include <linux/init.h>
    ! {" q6 {2 F  e, \; x3 K# s
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    , |: A1 a9 R4 h( b3 t: I
30. #include <asm/io.h>
    " a8 J6 T* O' u, E$ @$ @* k
31. #include <linux/moduleparam.h>
    : J' k& c2 [7 Z: i
32. #include <linux/sysctl.h>
    : e' u" X+ Y" W; I  D
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    6 T" V. E2 O* D2 M' g/ x& J
35. 
    3 P( n. S. x; ^/ H
36. #include <mach/memory.h>
    + s) w1 s0 g4 W) m" l
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    , f( p" |. @8 n0 f0 N+ g6 K2 {
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
      u( {6 ~, z% P; _
43. 
    + d- `8 `8 S0 r8 w$ j9 \4 z
44. #ifdef EDMA3_DEBUG
    ( P1 O. z: S7 D" a+ ]3 h7 _1 d$ C1 l
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    % c4 m3 Y7 Z- M, l& B: O9 S* t
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
    1 q: @" i0 b2 E; o( l7 K+ i
49. #define DMA_PRINTK( x... )
    # z* t0 M; C2 k* a
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    ! o6 ~, t% f; S; R" c6 v
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    2 w% _; f8 q7 u3 s+ \5 v
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    % O- v7 A$ P% M4 f9 O
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ! [+ N( ]7 K  q
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. 
    / q3 n4 _6 {7 X! t% Q: L
68. dma_addr_t dmaphyssrc1 = 0;
    / A) k/ H9 b( \; n" X
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
      ?8 c# T- C5 x7 O
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    " ~, s" A. s. P' u
76. char *dmabufdest2 = NULL;
    . z  W) j& u2 j+ j
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    : S! B; V: A5 K
80. static int ccnt = 8;
    
81. 
    + u/ Z% L; E' N' w
82. module_param(acnt, int, S_IRUGO);
    9 B8 T4 t( I& Q( e# e. N3 a
83. module_param(bcnt, int, S_IRUGO);
    7 b9 v. `* i4 p# B% m1 O4 f) S
84. module_param(ccnt, int, S_IRUGO);

复制代码

* [  M0 B) S; _8 J9 W5 |
3 _8 b+ B2 ^: Z$ m      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。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
. Y9 N, P) w0 \

3 C' `4 m9 S" q$ d) E