OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   0 V- t' p# a$ d! |2 L1 ?% S( P
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   # E# A/ D  h7 O* ^+ ^( u
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
    % l; I# G& B# y) f
11. *         TO CHANGE.
    ; X2 [1 k. _) p* Y' j8 D* ^! P  i8 s
12. *
    $ q# p" {7 p% x6 t- D$ B/ n, r5 c
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    " y5 }% n( g# v1 a) E" Y9 k, h
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
    7 j: Q! z9 o$ N% y
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    2 `' I* Y" R  a6 G
20. * kind, whether express or implied; without even the implied warranty
    & K# |+ I  o+ D4 N7 D6 B% K6 ?5 w
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ! r9 U; A! g5 |; S2 Y, O3 ]# }
22. * GNU General Public License for more details.
    1 _! H+ ]8 t) C% Y
23. */
    
24. 
    8 E8 P1 i# I  L- {; s! ]
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    * k; ^/ u! a" Q0 ~
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    : l7 y/ t1 @7 v/ h9 D7 |/ o
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    . k  F% e0 A- z9 B
31. #include <linux/moduleparam.h>
    ' |: R8 n1 O1 \  E
32. #include <linux/sysctl.h>
    7 K7 y' `  E) ?& |0 h0 C
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    6 W) e( F( M! X: k! a9 W
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    & f( O8 j. C5 Q" `% E
39. #include <asm/hardware/edma.h>
    % {# m  o" g7 A# L" w* `
40. 
    
41. #undef EDMA3_DEBUG
    * S; {- j3 G! i" [' R9 [% ^8 O
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    * q: j, r* M3 w3 d8 g  T2 {$ k
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    . H4 G. h. `/ _2 t5 @* d
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    ! @' t1 @/ c$ W' t
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    5 T+ x/ Y! U0 p) Z" ?# o4 [* o
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    ) V% |0 p: n+ p$ e: R$ h7 \
52. #endif
    
53. 
    & x+ {% ?2 L, V3 r! g
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    ) V6 s. S- X% |% Z3 m
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    * r- i; M4 p1 |3 d) n' n& K! ?
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    ; N* m) J# T+ y& s/ w
61. static volatile int irqraised1 = 0;
    ; r, S9 M2 p& U$ i4 U: {. O( K
62. static volatile int irqraised2 = 0;
    
63. 
    
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);
    % t+ f. b# v7 G
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    + i9 c8 f) A2 X! ~
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    ; U$ ^7 D9 i) R+ T9 x
72. 
      ]  F' G: @9 p: G
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    ) d' t% B0 h: f: |+ P
77. 
    
78. static int acnt = 512;
    2 k  L2 r; k% F' j( P9 C1 A+ K6 l- ]
79. static int bcnt = 8;
    
80. static int ccnt = 8;
      K/ i' K+ `$ x( j
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    , Q3 \# d+ i/ ?. a8 J, e
84. module_param(ccnt, int, S_IRUGO);

复制代码

7 b4 E1 {, P$ c4 P6 q      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 O& P: h; j' x! i9 carm-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。
: |, F. {% j0 ~5 V& d, i     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。


6 j+ B) E  [+ `- A