OMAPL138如何在Linux下使用EDMA3驱动

yyj

5 A' b8 ]( t" Z  ^0 ^. ?) y

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   3 ^; k4 n: O! L/ y3 u( }; e
4. *
   4 l8 V+ g% A) E, j
5. * brief  EDMA3 Test Application
   , N6 V3 e5 [  ^" V
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   : N5 M6 i! H. [* v: M0 `
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   5 F6 p5 v% c# H8 b# a  r5 M1 e
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    6 {. A7 U. B( D% Y4 o9 ]4 I# g7 ?
11. *         TO CHANGE.
    3 |* w& G7 G& @! g/ ]- e0 A/ }
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    8 y2 ^) A2 ?/ Y) U3 o
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
    9 e& t( |- {; l7 z  o. H
17. * published by the Free Software Foundation version 2.
    ) F5 I: s+ c) s& P
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
      ^8 c" i1 R! S3 d( {9 d
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    . p- J# g. @0 C- \# d! B7 k/ z
23. */
    8 f* Y' R# Z% A+ @
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    1 g  K! O. w, R9 F3 y; R
30. #include <asm/io.h>
    3 s* u) W/ \- `. f! H
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    3 d2 Z; }: Q% L% |( y6 K. r
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    3 i3 ]  k+ n! j) r% S
35. 
    4 B( V- V3 a; i% \6 a7 P! U1 K
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    6 W, @) W9 M4 B  w* C
42. /*#define EDMA3_DEBUG*/
    
43. 
    ! e/ @1 E2 f5 ?  c/ E
44. #ifdef EDMA3_DEBUG
    3 w2 |' A) }# q8 i* \6 @: S2 \
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    + j7 o3 I: u+ e2 e' o5 k6 w
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    - w) `- c; ~, W0 F4 W* D
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    0 e  Z# ^; Q6 K9 O1 w
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    % h1 J* o9 L! c, a' U- B( C2 H
51. #define DMA_FN_OUT
    ) t$ m* _3 u* }" M
52. #endif
    
53. 
    # s; o0 Z, }& w5 @$ [2 S! L( p
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    . ]* f  P3 }6 z( n1 ^
55. #define STATIC_SHIFT                3
    & ~- o& O( U' c$ v3 M5 a; h; [8 p" T
56. #define TCINTEN_SHIFT               20
    / ^; x7 M; Y7 `& [( p( }; x  p2 s
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    $ ?, p8 X7 B' E8 }! C* e1 o- D
60. 
    / z. {2 C$ v& O( B: L0 D, j) I
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    ; Q- {. T9 V/ M) [1 I
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);
    8 V1 S) i6 B' T' f+ R+ i
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    5 [" T' s- q; [5 R. |
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    * F$ h% a: @( F/ y
69. dma_addr_t dmaphyssrc2 = 0;
    6 q2 j* u+ c4 o7 N
70. dma_addr_t dmaphysdest1 = 0;
    8 x6 J+ B. ~9 ^! k) p9 i  ?& y+ G
71. dma_addr_t dmaphysdest2 = 0;
    ' R4 ]  ^1 a, ]% k  ~: @. p3 I
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    $ |! Y. d5 v0 N- B  S! c! Z& y) b. y
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    / i# l" L' e1 {( u; M( I
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    3 y) `# |4 E' y0 r0 }  @- C9 q$ S4 |
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

. U) r! s$ q) S% v6 `9 n
/ {6 ~7 d: A) T$ s, N      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
4 V  F! M- @& ^/ uarm-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。