OMAPL138如何在Linux下使用EDMA3驱动

yyj

6 L3 G& \4 O+ |# E; Y+ H6 n8 |

1. [code]EDMA sample test application
   ( F' {. x: ^, t+ R
2. /*
   
3. * edma_test.c
   4 K# C/ M# ]: d
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   ) M# Z! R; O; k! A5 c
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   5 f/ V( p6 c2 w* w' B
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    $ D' K" X" ?8 I) g+ p' K# @
12. *
    8 U: k, h, |1 ~( p% s% d5 Z
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ( X0 y5 K: o6 I0 G5 P/ ]
14. *
    
15. * This program is free software; you can redistribute it and/or
      @. @7 y/ s( Y6 }5 f* Z
16. * modify it under the terms of the GNU General Public License as
    3 G& ^9 ^$ k* C$ X5 a
17. * published by the Free Software Foundation version 2.
    % b4 B( ?9 Y0 @! B7 y
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
    
22. * GNU General Public License for more details.
    " y$ c+ S7 ]' ]4 h9 i
23. */
    8 s3 I2 z. h1 V' S; S7 J
24. 
    
25. #include <linux/module.h>
      l3 m4 h9 q8 j5 U
26. #include <linux/init.h>
    % Z8 V# c0 V0 y
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    2 E+ G1 E& G2 t, p, q* V& K5 n$ i+ V
29. #include <linux/interrupt.h>
    $ ~5 @; S9 n* r) i3 K
30. #include <asm/io.h>
    1 f7 C6 T  O& z$ X9 S- E% w
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    6 A5 `& k7 ?7 s5 i
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
      k# P6 h& U* y( B
35. 
    
36. #include <mach/memory.h>
    & Y2 ?. L4 i6 _$ W8 d
37. #include <mach/hardware.h>
    " q! _' |' _) _5 P! V) j
38. #include <mach/irqs.h>
    / K6 U  Z' J6 @. S4 [( t' {9 W/ E8 @
39. #include <asm/hardware/edma.h>
    
40. 
    9 F5 N1 G* k: a+ R! v
41. #undef EDMA3_DEBUG
      n- b( D1 @9 \9 b% `; ~, p
42. /*#define EDMA3_DEBUG*/
    + T, U, n5 L) v/ Y) g# C5 n9 q
43. 
    2 ~9 q0 T2 K" {. v- L8 Y
44. #ifdef EDMA3_DEBUG
    ( R) Y; V7 e" Y0 d
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ' D: d4 W/ k5 o( X1 ^" Z! b  d: K
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    % |/ B6 d) h( U! g
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    6 U4 C, V8 u2 J0 d8 R' }
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    ' _/ D) _* ]4 N/ K6 i# A6 A7 {
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    ( J( K' |& R1 E
58. #define TCCHEN_SHIFT                22
    ( |3 c9 _& N6 w0 |: D
59. #define ITCCHEN_SHIFT               23
    
60. 
    2 t9 I0 m; Q( b% L& G) }. ~
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    - X, X# U1 b9 k4 I
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    4 |+ r( G4 b% N- L  K9 E
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);
    , y  ?; E9 s5 U+ T+ j
67. 
    5 t7 [, w' }# j2 q# v( D
68. dma_addr_t dmaphyssrc1 = 0;
    . K) `3 \" K$ }, F" [) @
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    , @6 g) ~( U9 R, C2 P7 [
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    * [, K& F& o& b; t7 p- P; Z3 |
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    8 D$ u1 N( X" P- i( O
77. 
    + s# b' n% [, H
78. static int acnt = 512;
    
79. static int bcnt = 8;
    ' `! K& }  Y* W
80. static int ccnt = 8;
    9 f* y' V6 s0 C  L! }( @( J
81. 
    3 C; P# v! D: F
82. module_param(acnt, int, S_IRUGO);
    0 C: I( U: P& u9 ~$ V' T8 G9 M) o
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

+ p0 @( e! Z" o3 y# v; t' M6 z) a( L
' @! K1 T/ {7 x* B# k2 O      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
, e9 r& R' U6 x/ A& ]( Xarm-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。
; q$ v3 @5 ^3 |2 N/ l# J3 s2 L$ X
7 v) |# {/ |8 N2 a" N8 d