OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   3 e2 _% i. n  D5 m6 r' V$ ]
2. /*
   
3. * edma_test.c
   + |' l" j* G5 W0 w) y0 X! J; N
4. *
   
5. * brief  EDMA3 Test Application
   # ^, L" W: X0 a! e8 O0 u1 V- }% v
6. *
   1 o- g+ Q6 X4 {7 q5 x9 U0 F6 K+ r
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ' ]5 h3 t" B" s2 {
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    ( u$ M( x+ h2 k
11. *         TO CHANGE.
    6 e$ m/ h# l0 b7 [  m; C5 N5 s
12. *
    ! X7 u8 b  E# H9 D8 Q! R( z3 R
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    0 c9 O( G, T# s
14. *
    6 r: i( ?. A) i- ^! X' {1 K/ ?
15. * This program is free software; you can redistribute it and/or
    
16. * modify it under the terms of the GNU General Public License as
      a0 h# g8 |5 Z7 a% y8 t
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
    ) R. F- l8 B& L3 j. Y/ m4 b! u8 F
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    ( p, U+ x$ K7 _( C7 m4 u- e$ h
23. */
    5 v; ^& Z" [' E1 ^
24. 
    " r( Z9 ^5 }% L8 G/ M
25. #include <linux/module.h>
    ( t+ k2 y$ T& M, g0 c6 E; |
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>
    
31. #include <linux/moduleparam.h>
      z1 B; N, K4 k/ c
32. #include <linux/sysctl.h>
    1 P$ Z6 w* x! u. k- l2 G/ _& z
33. #include <linux/mm.h>
    : y2 E5 P1 y  t$ a6 }/ ]7 z: c
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    9 p0 C% n' U% Z! H  T+ Z
39. #include <asm/hardware/edma.h>
    ; s, ?: s# s' j9 J* V* H. b
40. 
    
41. #undef EDMA3_DEBUG
    ) v9 L. m$ q" G# J1 E
42. /*#define EDMA3_DEBUG*/
    
43. 
    / U0 C& S0 d% u% b" R
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__)
    : O* U) }0 [. v# x4 O
48. #else
    
49. #define DMA_PRINTK( x... )
    8 h; a: A- t/ v. ^$ ^# g; h
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    3 T8 e5 h4 g( U) i; Z% G
52. #endif
    " B  G' k/ |- j5 G0 v7 }
53. 
    0 J2 P/ }" R4 V
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    ) ?9 z$ U& m9 k# b0 f2 U" K
55. #define STATIC_SHIFT                3
    ' [/ H3 H$ Z3 ^& E% N$ u
56. #define TCINTEN_SHIFT               20
    9 i+ h8 h( j6 V
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    / Y* C  ]. s" I( O1 z
60. 
    + e- P* L% ~) e
61. static volatile int irqraised1 = 0;
    & C3 D0 i# l* G& D% r
62. static volatile int irqraised2 = 0;
    & U, O3 t% d6 ~( J
63. 
    4 o2 {* h" X6 Y# ?/ `5 B# U
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ' ^3 d8 r- j1 F
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);
    ) @" Z7 W6 b# Y5 ~2 s
67. 
    : g( i, t4 `- ~& b; {! {# y" P* s1 p
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. 
    
73. char *dmabufsrc1 = NULL;
      Q+ E, l' W, F2 j6 ?
74. char *dmabufsrc2 = NULL;
    : K" g8 }! r6 K: T
75. char *dmabufdest1 = NULL;
    , v. w7 ]" W5 ^8 l; |
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    7 [+ i' x% l. i8 x+ u. }
79. static int bcnt = 8;
    3 C& @+ h0 l4 Y& F) c9 a, q
80. static int ccnt = 8;
    * U: B" M- L. g; J! `4 F
81. 
    & d6 z9 n. C, B$ U3 B' r
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    " {5 I6 k/ q- @8 V; I9 n* R
84. module_param(ccnt, int, S_IRUGO);

复制代码

# f5 a+ `: J* [1 A( V! q4 h
      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
' z- Y( h" S' Zarm-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。
8 R( v" N$ x  }5 @. O     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. j) V0 z9 ^$ }5 z3 J5 A8 |