OMAPL138如何在Linux下使用EDMA3驱动

yyj

! j( K9 c3 w" l, ^: M1 K" o

1. [code]EDMA sample test application
   + X. _6 E& o% z  D
2. /*
   
3. * edma_test.c
   . g& ^* \7 a" ~! h( G  T/ d' m
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   ( i/ C' n/ U! T$ X; Y; D0 }* ^6 j
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
    2 A' `/ R- ?8 f; m) o
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ! u( T5 g# @. J$ ~8 m% ~
14. *
    3 f0 H" y% h# N: e6 u$ y, ]
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
    
17. * published by the Free Software Foundation version 2.
    8 @7 @0 g+ I+ H! ?+ w
18. *
    + c1 }2 ^. P- s
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ) o- D( W3 V6 }4 I
20. * kind, whether express or implied; without even the implied warranty
    6 G5 }. k- n, U
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    
24. 
    2 g4 p1 a" u. B" X/ p7 ?
25. #include <linux/module.h>
    # P2 x3 H9 V! u( d4 O
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    3 ]8 C9 o1 F$ g
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    . s- S1 @) u: B
30. #include <asm/io.h>
    / E6 a' l8 L% C- n
31. #include <linux/moduleparam.h>
    ; ^5 q8 c/ ~" W% ^
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    : E0 K1 e' B) E2 U' _+ u6 R! C( \7 g
35. 
    - ^  a# Z9 V, f
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    0 i/ m7 v6 J1 l5 V# Q" i1 c, G
38. #include <mach/irqs.h>
    & j3 V) g( B5 P
39. #include <asm/hardware/edma.h>
    0 y) i8 r8 ~; ~0 b9 y. w/ B7 _' T8 N; B
40. 
    0 @. \, u% G& i6 Y7 q, V; U3 c4 @
41. #undef EDMA3_DEBUG
    / L+ y/ b( P/ j9 z
42. /*#define EDMA3_DEBUG*/
    
43. 
    2 G" O' \( X# R  C( q- m4 I2 N6 F0 _
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    9 q- Y4 g5 I# S7 Y6 t8 y
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
      ^5 f+ ^' R( Y! D/ Z$ B" T
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    ) Z6 w6 }+ T9 \* p% F7 K
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    0 @* K' w8 N. `9 b' l+ e) G$ r
53. 
    5 |- d$ z# U9 y/ L" ?
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    / w$ C1 M. j( @& v5 r/ W
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    " V5 a* V/ M9 H6 j9 H! V
57. #define ITCINTEN_SHIFT              21
    1 C/ X2 ~8 i! x, K; Y9 c+ K
58. #define TCCHEN_SHIFT                22
    5 G. v$ x* L! @0 c7 V5 y5 f
59. #define ITCCHEN_SHIFT               23
    
60. 
    ! @: z/ ?& V- F! V
61. static volatile int irqraised1 = 0;
    / q2 c6 Z8 X$ S' R/ Q7 [( \2 e
62. static volatile int irqraised2 = 0;
    9 }+ r1 k3 j& ^9 V! m7 l1 [* `
63. 
    * t$ {: u  M) f9 u. l8 t- e4 N
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    9 n, Q6 G1 x1 C' Q: L
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. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    7 `! P) W0 \# W$ p7 B
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    1 }* e3 w; s" E& `9 l3 |
71. dma_addr_t dmaphysdest2 = 0;
    - v+ N; v0 P1 A+ Q& n9 Y$ v( n, u
72. 
    / A# `; V8 @9 x; M2 T
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
      P7 w5 a. p# E" R/ Q$ e  T
77. 
    : ~% \$ H2 z( _, n7 i4 k5 v% d0 b
78. static int acnt = 512;
    
79. static int bcnt = 8;
    + J. Q  g3 ~1 F6 L0 e1 R0 J: b
80. static int ccnt = 8;
    / ?$ v6 R  m5 O) B
81. 
    ( x' D- U. ]5 s3 T: k4 j6 M
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    ( ?) I7 @. y$ V* h9 q! v  j
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
2 J3 ?7 ?2 c* G3 a8 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。
" u+ a* x8 o7 Z3 ^! T     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

0 A2 p. E' v/ H
) @5 s- X2 n6 M) e4 @