OMAPL138如何在Linux下使用EDMA3驱动

yyj

; y' f. w% I( O6 }. n- z

1. [code]EDMA sample test application
   . R. m3 g7 C: M0 d2 @; x% C
2. /*
   ; D. @3 B  x! @& U
3. * edma_test.c
   / \8 }  T& N) _  D1 E
4. *
   5 ^7 Y+ k3 l6 Z$ b" \2 s% K
5. * brief  EDMA3 Test Application
   / T; w/ O9 J" ?; W
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   9 ^- I* ?8 v* ^' m3 ]  L
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.
    9 X" ?7 ~- |  p+ T: G
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    . A3 y. t, V. v* E3 P8 i( d3 Z
14. *
    + ^' u4 F$ P" p8 E# d
15. * This program is free software; you can redistribute it and/or
    3 a4 V  P2 j) w4 z
16. * modify it under the terms of the GNU General Public License as
    3 x7 V* l4 i. S6 }' r: [$ P
17. * published by the Free Software Foundation version 2.
    * u- D- R( Y6 _2 M  e; |
18. *
    7 W# K) o3 Q% v) t7 P) r
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.
    
23. */
    8 ?. e8 v! k* \" B9 J" v
24. 
    3 a- a: f; P6 p) M7 `
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    : {$ R; K- Z5 ]; d0 U
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    : _7 H& f1 p8 T$ V0 A, O/ ^
29. #include <linux/interrupt.h>
    2 T1 H3 x% n. E  _
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    . X% U& f8 m3 P- A8 D, H" s
32. #include <linux/sysctl.h>
    8 h) t1 i: [0 W0 c& R- z
33. #include <linux/mm.h>
    3 }6 f& a7 ~2 x/ H6 L' Y
34. #include <linux/dma-mapping.h>
    
35. 
    - f4 s4 `( r: T
36. #include <mach/memory.h>
    8 U9 y+ ?" z6 h8 K
37. #include <mach/hardware.h>
    ' H+ o# E5 T9 ]  }
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    % y) d' D" M* ^: n( U- L
41. #undef EDMA3_DEBUG
    ! F( l4 c) A, C, n9 }1 [" V, A) F; d
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    $ K( l# T$ z) b; z
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    7 _. ]% x% b2 b: @
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
      i; E. k1 t- V3 N$ Q# a
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    # F( l" }: X7 L! y
48. #else
    
49. #define DMA_PRINTK( x... )
    5 a+ H: q" Z% r# T0 C% O
50. #define DMA_FN_IN
    3 B" Z3 J- N* ~3 y- z
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    % e1 x$ g% C; T) F% |% S2 ]
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    . J% D+ ]( W  w6 V' y
55. #define STATIC_SHIFT                3
    : z5 S, _- a$ g* H2 c$ b) \
56. #define TCINTEN_SHIFT               20
    & n) v" e7 f  N# I( A" ^
57. #define ITCINTEN_SHIFT              21
    8 X( N4 m3 Y  v% j" }! V  F5 k! v
58. #define TCCHEN_SHIFT                22
    3 l8 z- {9 M9 U' f* W
59. #define ITCCHEN_SHIFT               23
    $ `1 k& N. ^& x0 h
60. 
    / h' v( _, }' x# g
61. static volatile int irqraised1 = 0;
    $ B6 `& g3 z" l) m
62. static volatile int irqraised2 = 0;
    4 L5 m) U6 j0 X4 _1 O& O+ c, u/ M
63. 
    ( X$ L; J3 T, Y) @) G/ V- y  I# U
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    4 G8 T8 k; Z1 P/ @
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    7 |5 r) w+ j& e% V
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    / J. _3 c& Q  Z. r
68. dma_addr_t dmaphyssrc1 = 0;
    5 a4 m/ O  a% K
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    ; e% W* F; Y$ u& h5 z; v
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    ' h1 U, @; n4 n- O* m3 o: r" \6 [
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    8 V- f9 V: |# _% _2 B& e
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    % E7 \3 d  j( t& m. f8 b% K( c5 S9 `
82. module_param(acnt, int, S_IRUGO);
    / G, ^8 a5 y  _! e
83. module_param(bcnt, int, S_IRUGO);
    : j# r$ f& O' O1 s+ }& ]
84. module_param(ccnt, int, S_IRUGO);

复制代码

: |& e  O/ \7 e  [& q, ?; n      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
. |9 n/ ]) V6 G- R' W8 S2 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。
1 O$ ?( C( {& Y
9 K0 ^2 K' B9 ~4 V4 M; _
# W9 e1 K: u3 @6 N! C