OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   0 \1 N2 a5 a5 z, ^* U4 u6 d/ d7 n
3. * edma_test.c
   ; D: P# M7 {( q+ X% }
4. *
   / W! |5 _/ C! _. F4 ^$ B5 m
5. * brief  EDMA3 Test Application
   ) C0 ?" I; g' Z1 ]
6. *
   ( i5 T6 @! Q( R6 x
7. *   This file contains EDMA3 Test code.
   
8. *
   / p( u) h* V6 [6 \, m9 o
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.
    
12. *
    + g7 [/ l$ i# ~/ V
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    2 @5 q( Z& C& U/ |# u
14. *
    
15. * This program is free software; you can redistribute it and/or
    9 @/ p3 r  y. Q* |
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    % ~$ T' \# L; t1 h& A- s0 l  K
22. * GNU General Public License for more details.
    + Q$ D* @; |9 t) N+ I9 K
23. */
    4 L# ~) n5 k9 @
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    ' @1 Q- J- k' i/ s4 b8 Q7 @- e
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    $ j8 d2 s& [6 i8 D4 M3 a9 W% v" ?4 a2 d
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    ; Y: Q. C. ^; p" w
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    ) V$ ]  n' A- q5 K; E
36. #include <mach/memory.h>
    % q. d  l- j4 a
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    6 @6 w* C: o7 P- m
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    $ G  A2 @, Z9 U/ `  b
42. /*#define EDMA3_DEBUG*/
    " m  J& ]; ?& \$ c" B0 {
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ! {, L, m  O- {! @% _& L) s; q
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    8 D& Q) k4 l4 T8 f1 b% r+ k
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    0 ]2 |* A  j. h0 {+ \7 y( Z
48. #else
    ) ~6 S" T# B+ m. A. ?: s1 m- u- k
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    * ]# w8 g3 m/ t8 M
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    8 t& W) e  _8 M
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    , W& [/ I9 D! j4 n
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    . X5 a6 G; }0 e5 p$ }
60. 
    ; C. w) G9 w3 u7 i( V" r" R4 F
61. static volatile int irqraised1 = 0;
    1 y- f% C5 b/ i% F- j, G3 d
62. static volatile int irqraised2 = 0;
    $ Q! j! l* U" w% X
63. 
    + F  _) y. e) S: l: Q
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    4 J% }2 E, i+ n' ]) u
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. 
    ! @2 _4 W) _; a; q* U
68. dma_addr_t dmaphyssrc1 = 0;
    % R' P* f: `% B
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    . C: `9 `% E5 N  m- O. n
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    ' D/ @3 `4 v; |  V
76. char *dmabufdest2 = NULL;
    
77. 
    ( n( q8 z7 z5 R
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    ) s: D6 r# x5 ]$ P. E, M- r+ f5 C
81. 
    # K7 C6 v/ N8 B4 d: H; d
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    5 g  ^) S3 N' L* i
84. module_param(ccnt, int, S_IRUGO);

复制代码

0 ~* U3 k. w4 c7 ?0 ~6 [, U, l
: D( ^8 \( a! q0 z* `      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
/ l! j; P& }3 X+ Q6 |0 Darm-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。
  w) \; m3 ]! @7 W7 p5 h     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
* n) _. n: ^* }8 A3 V' Y( |7 g' v& ?
! @0 u# K$ b) B, J$ u
* v* P3 @# F& @% Y& D* g0 A" l