OMAPL138如何在Linux下使用EDMA3驱动

yyj

1 z. ?$ ~, D- S2 ~: I0 J. ?: c

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   - M3 w; x) ]) K2 K1 s: H; z9 a9 S
5. * brief  EDMA3 Test Application
   . W0 ]$ W6 i; ~) ?  F
6. *
   0 h' j# r: M% i% T3 e
7. *   This file contains EDMA3 Test code.
   3 J$ O) k, d$ V: v8 T8 y
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   6 s' P! L4 E: M8 D0 _. O
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    8 _# X( \5 m+ y2 l
11. *         TO CHANGE.
    # t; Q: }* m8 @, }& y1 X8 E+ y
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ; ~# u' D) V/ c( R4 v9 o7 b
14. *
    
15. * This program is free software; you can redistribute it and/or
    2 Y; m6 F$ H+ u; I& j1 ?
16. * modify it under the terms of the GNU General Public License as
    ( I0 Z1 j* |: M8 Z( W6 h
17. * published by the Free Software Foundation version 2.
    , e- U9 b" [* [1 i6 M
18. *
    & I: {2 h* \8 n& r) z
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    & d  e& P' a' k: n# U9 r4 N
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    # z" P5 M, A9 v0 @6 l
23. */
    
24. 
    
25. #include <linux/module.h>
    2 i3 z# b% F' A' X; L
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
      ]3 p) D$ W5 N1 ~! ~$ Z
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    ; p6 N4 z) i1 N  [
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    # f) V) M5 @1 i
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    1 @0 C( [" C+ f4 p$ s4 a' c
40. 
    % d2 b: U4 d# ^: m
41. #undef EDMA3_DEBUG
    7 P0 v( q2 p0 D4 |# S
42. /*#define EDMA3_DEBUG*/
    
43. 
    " n: `9 Z" j: }& m2 ^( }2 y3 }
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__)
    . h2 a7 K7 S0 d% m
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    ( B0 W" J( n3 d7 V0 N
48. #else
    ; p2 K9 r7 i& g( O7 d
49. #define DMA_PRINTK( x... )
    3 M& E2 }1 ]: B. a
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    5 a, |" g; \- ?: `# N
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    0 u- I7 g$ {* L: X& d6 L
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    ( z# z% p. o0 l! L: [
59. #define ITCCHEN_SHIFT               23
    $ X  Y  {# D! h: J0 |# @9 v
60. 
    3 g; `" T5 j9 E: c
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
      [; m0 P6 `/ F" q7 x/ H4 P8 [+ |
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);
    9 r$ e3 L: b* I5 Y9 d  x
67. 
    6 z8 j% I+ {1 B, @) o* F. u, x
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    4 c; X0 {: {3 d; f* a
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    2 s2 _% q2 X; x; u0 F7 d" S0 @8 k
75. char *dmabufdest1 = NULL;
    1 w- {* V( J; r+ j/ ]% ~: V; [
76. char *dmabufdest2 = NULL;
    + S# U; @- k% `% z8 V5 @
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    $ {/ x1 \& C* e9 n2 s/ L
80. static int ccnt = 8;
    1 A- Z- |: y2 q" U
81. 
    - y3 R2 d" ~- X8 R$ G) K: q! H; y) N
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    + k1 D1 ]# ^' }7 I( `$ n7 I: q
84. module_param(ccnt, int, S_IRUGO);

复制代码

      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
; Q1 j6 i/ @5 m( o" Harm-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。
5 T+ C$ d2 ?7 I; j/ t7 _2 e! 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。
8 G: _1 I  F: a7 }
* R8 E. E$ P) K2 M