OMAPL138如何在Linux下使用EDMA3驱动

yyj

& u' j$ A8 O7 u) `. C  C

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   * G) ~. R* G7 t* B0 f
5. * brief  EDMA3 Test Application
   % K( [2 v6 I9 U
6. *
   # g8 y6 u4 ]! |7 B
7. *   This file contains EDMA3 Test code.
   
8. *
   $ L3 ]9 r! A7 ?3 _6 d, t8 Z
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
    & N# |# z* V5 {: G) G# ^- |7 a
11. *         TO CHANGE.
    / j  z( V4 m; V: d* ~5 e
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    + A4 l4 `3 \  F" B. B
15. * This program is free software; you can redistribute it and/or
    * z: B# l0 T4 w" s  d6 z
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    4 A+ f3 `8 u, t1 O1 ^8 |! j
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
    " v1 W  K* w) N; T5 G' p
22. * GNU General Public License for more details.
    # z; m' v1 h/ ^2 P8 g% u
23. */
    + H6 v3 H7 F  R
24. 
    1 K& u) d; z4 Z+ l. [2 h
25. #include <linux/module.h>
      `# J& m4 c& Z; F1 V+ y
26. #include <linux/init.h>
    1 q2 I" P. Q' ]  K. T7 g( w
27. #include <linux/errno.h>
    1 [0 D* @/ Z6 s3 Y4 e6 |
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    . @1 S8 a5 f! u; n0 Y, P/ }
31. #include <linux/moduleparam.h>
    % C/ ^3 s5 E/ X9 i1 p! h7 X
32. #include <linux/sysctl.h>
    5 M* q: _. X4 U" P! D
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    0 q1 Z6 g) Q! c
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    1 D; |# v( i" l+ e
39. #include <asm/hardware/edma.h>
    * Y. X5 T2 ?; U. k  e( S
40. 
    " q3 R4 j+ s3 u* D. A' N# L$ ]# x6 B
41. #undef EDMA3_DEBUG
    5 S1 n+ [1 G* J! d
42. /*#define EDMA3_DEBUG*/
    & a& J% {9 O5 i) C0 H8 {, `
43. 
    
44. #ifdef EDMA3_DEBUG
    1 ~; p' ?! ~: N6 _  d
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__)
    ( U) b1 m6 Z7 p( U- ]
48. #else
    
49. #define DMA_PRINTK( x... )
      x& O/ C  f+ [/ m, f3 b: P
50. #define DMA_FN_IN
    2 ^% I4 w# ~( m  l" R, M8 K# i
51. #define DMA_FN_OUT
    3 I8 k& `# D& S; U1 `7 W: @5 Y) d
52. #endif
    
53. 
    ; {7 v+ g0 n% ?. _1 G1 S
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    9 ?3 X+ n2 F) ~; W
55. #define STATIC_SHIFT                3
    1 R) Y( |$ y8 Q! l) `) O
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    3 D" U. P$ A0 H) g' n2 ?% i4 U; O
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    $ x$ r3 l: a! V$ G/ H& S% K& W* d
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    & h8 |" U2 ~4 {; {% ]% q( ?5 z/ H. m
63. 
    1 S1 g: }6 j$ s; }; o* @
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ) s+ Y3 K+ e& J3 b" q
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    1 O9 ?* }, }: L: P! w. @- n
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;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    $ q- V$ H; x5 D- v5 m) }, Q9 }
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    + P& Y# W3 l$ T' h1 `
73. char *dmabufsrc1 = NULL;
    6 w' M# u8 K& ?4 C; i+ F  O$ T& j
74. char *dmabufsrc2 = NULL;
    * o( e( v# ~4 x, m  @7 r" I
75. char *dmabufdest1 = NULL;
    $ w; Q, f. D9 T, u+ I
76. char *dmabufdest2 = NULL;
    1 Y4 |8 C8 N/ L5 X1 r5 C) w1 r
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

1 q3 t4 R9 G8 |3 [5 I
      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。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
- w5 [$ Z9 E6 P8 I& z; s

& K" X5 R9 m2 r7 z0 b