OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   + t) ]) H, Y- e% h9 e
3. * edma_test.c
   
4. *
   : o6 Q& C" w6 A/ Y1 H' _
5. * brief  EDMA3 Test Application
   5 g) f+ T# f9 J. g! H( n+ Y$ O
6. *
   
7. *   This file contains EDMA3 Test code.
   1 F7 e; p" R* ~1 g) @- {
8. *
   " i; q; W% W( \
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
      V& W" u, _! V- p# ?0 O' w' d1 |4 _
11. *         TO CHANGE.
    
12. *
    # p+ p' r# b2 H2 p9 [6 n  p0 N$ {
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    7 T' |2 S4 R! {- W/ ^
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    * e- I1 x: ~% Z6 y5 ~6 o% R, {
18. *
    / A: b- P$ G6 n2 K
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    9 g$ E, f1 C& V0 z
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    4 g) w9 q5 s( a$ I1 H8 C9 G
23. */
    ! o1 U& ^# F* q7 @5 t: U6 a
24. 
    " R& g" G/ n6 A2 ]
25. #include <linux/module.h>
    " B1 u# Q- P9 C
26. #include <linux/init.h>
    " g% d) R% W8 @! o  `: D0 w' d
27. #include <linux/errno.h>
    + {& D% K4 F4 o3 h$ b" `' d( y
28. #include <linux/types.h>
    9 U3 _6 @; A' e7 W
29. #include <linux/interrupt.h>
    6 T; _, |: h) q8 Z( i' `* m- X, _
30. #include <asm/io.h>
    / _9 \5 Q* ^% e; c& r/ \- w
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
      y. C7 d, z  ]" E" i& }9 I
33. #include <linux/mm.h>
    3 I- [- d% L# c
34. #include <linux/dma-mapping.h>
    ! L# i4 G4 P, G' f1 C
35. 
    4 p) `: W: _. P) F+ W) h2 f7 i2 |
36. #include <mach/memory.h>
      {2 @& E! ~4 ^- m' U
37. #include <mach/hardware.h>
    4 J6 ?6 \. S1 p+ E" \+ s$ K8 h
38. #include <mach/irqs.h>
    ' G: F4 }. z8 @6 d$ T0 c0 b, m
39. #include <asm/hardware/edma.h>
    ( o/ S4 C3 h2 t. I, U( N
40. 
    % r: S& b+ C( I0 ~& C' s
41. #undef EDMA3_DEBUG
    0 _3 N4 f- I2 L9 N
42. /*#define EDMA3_DEBUG*/
    % C$ Z+ @8 ?* A5 I8 x& I$ T
43. 
    
44. #ifdef EDMA3_DEBUG
    
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__)
    ; F* P; T( b0 t5 Q8 j/ Z
48. #else
    9 Q, K) f5 p) \
49. #define DMA_PRINTK( x... )
    - ]8 Y3 m9 \* N, c6 x
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    ) n+ |2 @) j, `
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    7 P5 Z  c8 m" }: X( {4 u- j( n% A
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    , q+ }  g5 d' @$ R
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    ( C6 A; m& n& L8 r! d
63. 
    + V: y! N% K5 h$ p# r
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
      d% }. y  F0 J; k; L, h
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. 
    ; i: e: {1 s4 n+ ^' E* @8 j9 x; u
68. dma_addr_t dmaphyssrc1 = 0;
    + k4 X$ c& o2 e" e7 ?' \
69. dma_addr_t dmaphyssrc2 = 0;
    . k! h0 j! U/ Z6 \+ \; A4 Q" X: b
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    ; U" M7 h- f# W" ?  ~- D8 [! C
72. 
    ! l/ x( V8 H- G4 `. `6 o
73. char *dmabufsrc1 = NULL;
    / k' _  w  r+ L6 r0 |9 A
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    % e( n- M; @% N- J
77. 
    9 u- M+ t, l- |6 r) w
78. static int acnt = 512;
    
79. static int bcnt = 8;
    2 V2 w( u4 p# V. a5 K8 N
80. static int ccnt = 8;
    * d( O+ W, G5 @5 u) I$ _
81. 
    0 ?6 m8 ^" x9 d( j: w
82. module_param(acnt, int, S_IRUGO);
    * @3 C% O- K2 [
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

! L- s% G# |9 |; U$ P; w+ L; y
      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
5 b& D$ w  b* ?/ carm-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。
+ N# J4 L6 `& a# B     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

5 I3 R/ i  O- R7 g