OMAPL138如何在Linux下使用EDMA3驱动

yyj

/ N4 }2 e8 i% d* W$ n8 w

1. [code]EDMA sample test application
   5 G& @- H7 r$ _
2. /*
   / W% b+ ~, f5 R0 J9 G- ]6 B3 r
3. * edma_test.c
   + T) H& D* z4 I+ a  M: e
4. *
   2 o* i% C5 V7 I" s2 @: R
5. * brief  EDMA3 Test Application
   $ Q" y. R" S+ `* R% Y. ]/ q
6. *
   , O6 R  C; J9 D, I/ X& |2 ^
7. *   This file contains EDMA3 Test code.
   * V5 ^  I8 D9 x( X
8. *
     E/ |( {  D& u, y+ b
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   " J! Z4 }9 u! G
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    # b+ H3 Y. }, ]; D+ W, O
12. *
    ) @1 ]+ j/ G- u, W: R0 k# d5 R6 W
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    5 l  ]4 R  \- ~! {/ p! {6 S4 L
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
    
17. * published by the Free Software Foundation version 2.
    
18. *
    4 ~9 S3 t3 Z0 R
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    1 J+ j- k% s# b/ O
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ; V5 z: k8 X; b
22. * GNU General Public License for more details.
    7 n- b) ]- v  r. f) V6 I( r
23. */
    . H( ]* ]& e+ A! \  Z) O( T4 ]
24. 
    . d/ o% t$ i9 z
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    . |4 T. `) T& i; D0 j2 R
27. #include <linux/errno.h>
    2 M3 [' c& K& c. ^2 S
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    " N& G  A8 u& m% Q8 b8 o
31. #include <linux/moduleparam.h>
    6 t# B' u: B" F2 ]
32. #include <linux/sysctl.h>
    ' R% }0 Z/ D+ S% A# T" J1 e- G* u
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    . _$ x$ \! i) Z& G" M
36. #include <mach/memory.h>
    " E/ ]* {$ V& D% Y
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    & O# `9 r* S+ [* y
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    ; x) q* q# J6 C* o4 T0 T
42. /*#define EDMA3_DEBUG*/
    
43. 
    , p. M# ]4 \, f, d1 ?
44. #ifdef EDMA3_DEBUG
    % W+ g" z1 G$ p8 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__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    ! ]# K' w5 F, [' `$ f, G/ H) |/ U
49. #define DMA_PRINTK( x... )
    ' q3 d. c. i* P. K2 V2 c$ f
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    . K; k+ Q( x( P. D3 y
52. #endif
    * a  o" {& u- y" D: [
53. 
    1 g! \. v# S& A2 k; c, b: F- h% M$ P
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    " m) i" I" t' Q  {& g% b; d
56. #define TCINTEN_SHIFT               20
    ! }% ^) T; v1 E: F% P
57. #define ITCINTEN_SHIFT              21
    ( z" s* e& D+ N7 x
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    ! P* `% O3 r2 o  F$ S  O8 a' c# `
60. 
    ( a9 S% V9 i& U$ `
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    ! i$ o8 J' C* u6 g
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);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    ) M, }: r! ~4 g5 L. N
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    8 Z% F$ n& |( H  p! B
72. 
    4 t. F$ k3 o  E
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    9 C3 F% u. D% n7 l7 f# b# ]9 `1 F+ y
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    % v3 B" m0 ^3 N
79. static int bcnt = 8;
    , a3 J* l  e9 l7 K8 b4 h9 c
80. static int ccnt = 8;
    $ D, l# `5 {/ f
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    4 `; y0 L0 D; E
84. module_param(ccnt, int, S_IRUGO);

复制代码

- i0 a3 G; @% }7 b      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
3 n( C/ `) }( Farm-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。
9 w, u4 a& ~1 h% t1 Q, W
! s7 s: V0 ]6 b8 ]" U4 k