OMAPL138如何在Linux下使用EDMA3驱动

yyj

# X. j9 v* M5 }  v! w7 Q& ]( A

1. [code]EDMA sample test application
   
2. /*
   5 I9 ~9 q) Y7 W. c  V
3. * edma_test.c
   ; v- s+ j7 R+ ]+ ?& Q8 T
4. *
     T7 P% X1 q3 `0 t8 T8 J
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   4 J# P7 q1 V/ N7 T, X
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
    
11. *         TO CHANGE.
    , T& e) l- M/ z; f  T# R0 e
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    5 |8 V: n4 [9 s/ s+ G' n
14. *
    
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.
    - k& N! ~9 L3 F9 V7 C3 P  w, z
18. *
    1 ]+ q. I" J+ V
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
    ) x5 `, m# [: H' ~7 r, p" ?
22. * GNU General Public License for more details.
    . ~, S/ f  }/ i# [% @
23. */
    , r; _! V) {' e9 {1 c+ I
24. 
    . V- e( E- g6 V5 P; D6 o% ~
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    8 X  M3 Z$ t  ]* F, ?6 {. E' L$ ?
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    4 i; l0 s$ n, a+ P- i* X
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    - F& a. n. T9 |2 Q) c6 t2 ~* W1 b& y
33. #include <linux/mm.h>
    ) b+ a6 O9 w/ S! q/ C) d
34. #include <linux/dma-mapping.h>
    
35. 
    ! r$ t$ v7 |5 K7 |  t
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
      Q: G+ Y- o( e0 |3 N
40. 
    ) \1 q) S- @! \  M/ K4 c& q5 J+ E
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    & Q7 m! S" T: \
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    & g  Z0 h8 ~7 u9 \4 p) I# ^( A1 v
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    * o4 k' _' m+ K! Z$ m
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    " j: n( [# K2 B. Y
52. #endif
    9 o0 Q3 G* O0 Z' D0 r
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    ) P( M4 P' b$ i3 T% S
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    7 O& j) w% G' [7 _, s8 `# R
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    0 A' Y  o, j3 B
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ( f* d. A3 Q9 Y+ \6 O: Y
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;
    / Z. B  t7 `& R+ w5 H/ t$ D5 ?
69. dma_addr_t dmaphyssrc2 = 0;
    ; w3 X2 M% |4 p/ y, l' f
70. dma_addr_t dmaphysdest1 = 0;
    # G% ~# F, S# l! K) [4 h. n
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
      |; h" x/ Q% ?. z
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    $ w/ e  p+ `9 Y5 U
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    9 R1 A  l  q1 ?3 m; u2 K# N" @  L
83. module_param(bcnt, int, S_IRUGO);
    
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
" |; d1 L+ y. y( ]0 m' j0 Qarm-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。
; p1 j$ T5 b  w; C. ]2 P& v     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。