OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   ( ?& K4 I; i. l0 \
2. /*
   ( d) R- p2 U. x1 s, o  C
3. * edma_test.c
   
4. *
   6 I- k' p1 F$ T. F
5. * brief  EDMA3 Test Application
   + f& X( H+ F; _2 D: Q& K' l
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   9 n  O" [' H1 v* l0 o- h
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
    1 ~$ g7 R' P  O5 O3 s, R
11. *         TO CHANGE.
    
12. *
      K; S; p) Y3 d* W
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    # D7 F2 U  N! a+ J" w; a0 y: k
14. *
    " x) z9 I. |  H3 z8 F8 T7 Q- [1 ]: z
15. * This program is free software; you can redistribute it and/or
    ! \+ \* E# [7 K7 s/ x( h; Z. t8 o
16. * modify it under the terms of the GNU General Public License as
    * u! E. X$ V( M- o$ u
17. * published by the Free Software Foundation version 2.
    1 }/ r+ l! }3 V: T5 R- J
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    9 Z3 |5 C- Y0 Y/ [
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    1 _' ^8 u3 }9 c+ F4 j2 Y5 T$ k
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    , S+ J: A; S6 T  j. g: E0 n
27. #include <linux/errno.h>
    / Y  Y. s" _4 y8 m5 M) ^
28. #include <linux/types.h>
    . I6 ]  ~' [& C5 L9 A( E
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    3 o$ J3 ~! G4 e; C' N  A4 i# D
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    8 j% n9 A# K2 H5 ~3 r9 r
33. #include <linux/mm.h>
    0 D3 G. ?0 c- }- ]4 [8 L: w- k
34. #include <linux/dma-mapping.h>
    
35. 
    . s: K' A# C5 D5 U: W
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    3 g5 a! A+ o" L* J' H/ W" }
39. #include <asm/hardware/edma.h>
    ' S0 w5 C5 N. T! u( ]4 i8 O
40. 
    ) p" E2 D8 D5 k- m! y' O
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    0 ~; g0 Y+ l! w1 u" }
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    1 O. K' r5 g6 P1 A; g) a/ F! n/ {
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    ) `/ L6 P' c1 g# E
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    % l/ `- f/ ^. T' @
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    0 |- f: ?1 b$ c! c5 @7 E! \
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    0 f! r" w- \2 q, }5 C2 x* l
60. 
    & Y- F1 I7 l% q7 b
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);
    ; z- ?8 z4 D8 O$ a1 T  G
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. 
    3 j. B1 V2 i! x4 ?
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
      H, Q+ O) ]9 M# U  N
70. dma_addr_t dmaphysdest1 = 0;
    ( n/ A2 B: d  B: w7 Q* {
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    % M7 G$ M# J( g1 v& d
73. char *dmabufsrc1 = NULL;
    1 W* U& S2 P# m& H, {4 c$ i; \
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    * r( E- H( _' w6 r, u
76. char *dmabufdest2 = NULL;
    
77. 
    5 h; T& G# ~5 r) {
78. static int acnt = 512;
      }  z1 o, w0 w$ j) B& L3 L8 L
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    . F! h, s8 x& {
81. 
    
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

8 A# ?+ _, ?0 Q0 j
- }# e8 h# d( o4 ~* [7 ^$ s      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
6 f$ F& }, R# A' P- f$ `/ j. 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。
. k* [6 A/ O. }5 E: ~     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
! p5 _8 m1 E5 y9 [# m