OMAPL138如何在Linux下使用EDMA3驱动

yyj

7 K  ~1 |* g6 d$ R

1. [code]EDMA sample test application
   8 {1 D" \+ J/ @, H5 h  r, y
2. /*
   
3. * edma_test.c
   * S$ @0 K4 t: M/ d
4. *
   . U- V% O6 J* }5 m; Q; d; w
5. * brief  EDMA3 Test Application
   ) F) }7 M, m  _2 s4 Z+ l
6. *
   
7. *   This file contains EDMA3 Test code.
   3 z# J0 x% U+ \6 p
8. *
   # ~/ e9 h" Z1 l; `( b  i8 d) R
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   3 Y& N, l7 ~" c% \2 a' T
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    # U0 s, M3 M4 l4 _( N2 z
14. *
    
15. * This program is free software; you can redistribute it and/or
    & B) i, D8 ~2 Y3 K
16. * modify it under the terms of the GNU General Public License as
    
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
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    7 T# M, e  U* S. Y$ x
22. * GNU General Public License for more details.
    2 ^+ g. k4 |) m; m% ?
23. */
    
24. 
    
25. #include <linux/module.h>
    3 [0 y0 m5 z! s0 r9 q5 k
26. #include <linux/init.h>
    2 ^* x* f  w1 v
27. #include <linux/errno.h>
    # }; l' f# x& ~- f8 d9 x
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    - M; Z- e6 ?9 c- h' P) J6 n# R
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    3 \$ [7 O6 Q5 s. `  R
34. #include <linux/dma-mapping.h>
    $ g( e5 c. k: s7 V2 U1 j" i
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    " m& ^3 _8 M' o
39. #include <asm/hardware/edma.h>
    9 R6 h* f  K* h$ n$ c3 \) ?9 T" L
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    1 F, C- {) f" M! q) Z! j
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__)
    . q$ _4 K; }8 C" _
48. #else
    
49. #define DMA_PRINTK( x... )
    ; O; D  _: x, y  y: A3 t% W$ ^. J
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    ( H8 k( l: [& d! [( e0 s" N( ~
52. #endif
    
53. 
    # A% `% A' U, E& R! I" N( r0 w
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    * o( t7 g9 y6 Z# c
56. #define TCINTEN_SHIFT               20
    . ~9 Y' |: s8 O
57. #define ITCINTEN_SHIFT              21
    " }' `# r2 z& q2 a6 R- U
58. #define TCCHEN_SHIFT                22
    1 B0 C$ A" D  l7 ]6 V+ d
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
      A8 H4 _0 |! L7 G6 |7 y
62. static volatile int irqraised2 = 0;
    
63. 
    ) d$ w0 l: w. w2 h
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);
    ; |* f/ r2 r% U' i1 @; U+ y+ G9 k; ?
67. 
    
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. 
    5 B  d4 Z$ {+ r
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    - ~1 A7 I7 S" b0 D" i6 K7 k' f8 J3 h
77. 
    
78. static int acnt = 512;
    0 W. \7 d! {7 n2 H$ I4 [
79. static int bcnt = 8;
    . W$ Z+ d7 ?" j; X' B
80. static int ccnt = 8;
    5 r; {+ [" _# p% \. U! k( \
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    ) y+ F4 j  t3 K0 l
84. module_param(ccnt, int, S_IRUGO);

复制代码

# q* P; w1 n  K5 T; F: `! S% c
' A/ z: B4 W5 ~      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
1 V2 j) J# [. E9 o! K& d( Marm-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。
$ G* L' h7 }& q
2 G) Q0 X8 Q! ~
) G/ B6 X! [7 o: g6 x7 H