OMAPL138如何在Linux下使用EDMA3驱动

yyj

- B( \) d! h4 U1 e$ V$ g  c3 {# m+ r. O

1. [code]EDMA sample test application
   
2. /*
   3 y/ x4 c+ `( T$ P& m* B0 v
3. * edma_test.c
   0 G8 O7 b5 J0 ]; a4 W- E# s5 E# U$ R
4. *
   
5. * brief  EDMA3 Test Application
   - S9 ?9 K# V! L
6. *
   $ t9 }/ h5 G/ D
7. *   This file contains EDMA3 Test code.
   
8. *
   
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
    
11. *         TO CHANGE.
    + W. c  f2 T# {# U8 ]- Z1 w
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    . Z+ q* T6 J8 _3 s0 z4 V
15. * This program is free software; you can redistribute it and/or
    0 X  t: J) ^! y, g
16. * modify it under the terms of the GNU General Public License as
    3 W+ V7 l7 G0 n  a# V3 r! d
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    , V3 E, |6 [7 L* {/ R
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    : _; k8 Q$ _# P4 M. A, i3 e
23. */
    ' E$ ~7 S, f* n( e' t5 p8 ~
24. 
    & K2 D/ u, y5 L; {- V% k- L
25. #include <linux/module.h>
    5 }8 d) {. K5 A8 J! p
26. #include <linux/init.h>
    ' R/ Q3 x- c! \' Q$ x4 O
27. #include <linux/errno.h>
    9 i! w  k( w4 ?* {9 H
28. #include <linux/types.h>
    : S" r& B3 H4 J
29. #include <linux/interrupt.h>
    : P& w  O/ M) P- u3 r* a* n3 @
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
      T6 U/ C4 Q4 Q" }: B9 _
33. #include <linux/mm.h>
    . ^3 K* L$ R5 b/ D2 R" l
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    $ ~$ Q, X9 @& i& d: w9 Z+ L1 [
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    1 |6 d0 k6 n  f: ]' s% A
40. 
    + c) R. {/ N" x. B  {5 @2 o
41. #undef EDMA3_DEBUG
    ' w/ j/ }* {8 [+ S2 U! i9 {! ~( w. v
42. /*#define EDMA3_DEBUG*/
    8 E+ |1 k8 m( h5 a2 X2 [) f
43. 
    7 U1 i& \, b6 `! c- j1 C5 N
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    6 M! B$ B8 R& E& f& u$ b5 S
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    % E0 N! y& e1 d) b  a! a
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    " R0 u( X& |# @- d, l) P( H; q9 ~  x
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    ' Z. H+ W6 F: W, i& E+ f
51. #define DMA_FN_OUT
    
52. #endif
    1 w6 M( v0 B) G4 V& I; D
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    ) E* p$ |' a- Z# ?; @7 @
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    + X6 F. ?, \* n
57. #define ITCINTEN_SHIFT              21
    " q& @& z! H- ]7 G3 q9 \" k* z
58. #define TCCHEN_SHIFT                22
    8 l( K# `- q, `9 Y) m
59. #define ITCCHEN_SHIFT               23
    
60. 
    
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);
    ; H. N8 ], l* j/ S% O
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    8 b$ h2 q; s0 p
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    5 X$ B1 ], g7 w) ?! T6 V, F4 T
67. 
    4 [6 `2 `/ g- d- M0 L/ H6 j
68. dma_addr_t dmaphyssrc1 = 0;
    6 \( ^. R: R  X9 g1 r9 A7 H
69. dma_addr_t dmaphyssrc2 = 0;
    8 [& J6 B' U& u/ x
70. dma_addr_t dmaphysdest1 = 0;
    4 g9 {; \7 Z3 L9 O
71. dma_addr_t dmaphysdest2 = 0;
    # b, M/ p  ]6 }4 ]  A: o
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    * R5 f  b- j: z3 S$ G1 O
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    0 L* n# V% d2 ^! L' }: g  O; @
77. 
    
78. static int acnt = 512;
    , Y2 J4 Y6 T! h0 n* F. `- J. Q; Q
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    1 d% T5 U# F6 O, ?: c" I
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

; W' x1 t9 L' k7 J# P9 G
      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。
/ Q6 ~0 q+ X6 e0 |4 y) ~, ?     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
; J  U) _/ {0 J6 C! B