OMAPL138如何在Linux下使用EDMA3驱动

yyj

: }  f" ^$ L' u0 r: h( W# H& N# M

1. [code]EDMA sample test application
   
2. /*
   6 V4 e& h  E! L/ u
3. * edma_test.c
   # w" ^) C* J0 @* a, S# Z
4. *
   
5. * brief  EDMA3 Test Application
   9 q. i4 _& }4 _- d6 ^
6. *
   & h0 a; a" ~) X# {! O7 Y
7. *   This file contains EDMA3 Test code.
   : r1 P# V$ t# G5 b# `0 z/ `5 @
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   $ |' Z% v: E5 M% L4 D# a$ S" `0 k6 J
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    % l# C, h, I% f" F( V7 s
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    / q; P, a0 C& f5 E: w" {
15. * This program is free software; you can redistribute it and/or
    4 T" ?5 u$ I9 Y0 C; `0 s( q
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    # P! `- m' j  O! a" P6 H/ g1 [: w( |
18. *
    . s* H9 q) z7 a% Z: G9 G0 n
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    2 b& K" E+ W4 w. [
20. * kind, whether express or implied; without even the implied warranty
    1 \) z5 u, F  {$ B
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    7 a  Q  L) R& J4 u  v
23. */
    2 y5 w- E+ Q) ^. Z8 v1 u  s
24. 
    5 W$ [/ s7 T8 @1 q# _, E" y& g
25. #include <linux/module.h>
    # S+ |; q4 Z/ z
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    9 [4 B2 c) }$ z, E8 @
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    & S0 A, E# v1 {  e2 K+ g) c
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    5 j6 U8 H8 W1 b3 R7 q$ M2 O- `
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    8 s' H/ l' M4 _
39. #include <asm/hardware/edma.h>
    
40. 
    % G& W$ Y$ ], C  z- M
41. #undef EDMA3_DEBUG
    # I9 i, c& I" F4 y5 i1 h- U
42. /*#define EDMA3_DEBUG*/
      f2 O6 S/ y% ^1 Q8 b
43. 
    ; v! O& j2 `, Y$ z
44. #ifdef EDMA3_DEBUG
    9 ?! l! I! e$ q% p, y* i
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    0 b1 M+ p, O& U9 ~5 }. Y
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    0 B5 U0 D- ?  C8 }
48. #else
    
49. #define DMA_PRINTK( x... )
    9 H8 K4 s: m- z' W$ [, H; F" ?
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    8 A: o- Q8 F- M1 s- c
52. #endif
    . }* U( ]' ?+ {$ g
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    - V: _! ?3 O2 w( S4 H( P4 [3 [
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    * z' o) X" ]# B8 g
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
      g* B6 N) x: b- W: Q
60. 
    
61. static volatile int irqraised1 = 0;
    ) E7 z8 l  b6 s. X
62. static volatile int irqraised2 = 0;
    
63. 
    
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);
    ! V1 X5 g/ L! X: X
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    : [- e9 v  E9 A
68. dma_addr_t dmaphyssrc1 = 0;
    9 b$ I+ d  M: p5 R, x+ p0 N. N
69. dma_addr_t dmaphyssrc2 = 0;
    # c% {1 _9 g2 w) C* q
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    , w7 e3 D% K9 k6 f
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    " u6 L8 d5 l3 ~8 l" H
78. static int acnt = 512;
    0 {* U0 _# i3 T3 C% c& t
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    2 ]/ _6 |7 C2 |* t* K; h
82. module_param(acnt, int, S_IRUGO);
    : A9 d; J2 ^4 D1 x$ P8 ^0 _
83. module_param(bcnt, int, S_IRUGO);
    % l; a$ x( }4 x( y# ?! A$ o- I
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
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。
" {( C$ a$ D) w4 Z6 U     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
3 M: n, F% I' [; L4 w& S
2 \; g- t( A: R. B! L