OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   3 b9 w7 x; j2 t! @. \
2. /*
   + N" z7 T9 w% l9 p, c
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   4 ^5 x( b7 l/ W$ ?2 D- g1 q* O
7. *   This file contains EDMA3 Test code.
   
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.
    5 ^' r' B+ P! g" o+ g( D: k" i. I
12. *
    $ n7 }  s3 T; W3 V3 _5 g! ?
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    % X# D( E1 h8 m% a6 N
15. * This program is free software; you can redistribute it and/or
    ) v! J! p" M8 W8 d+ r
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    + i" H( D/ r4 T  |+ x! W; U, `" I
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    & C7 T% J7 @+ g! }( p  E
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    6 l% I; }' N1 Z0 [) z; W, L$ o* L
23. */
    / P% W" j  ]/ ^5 S
24. 
    7 s  I& z! M& y2 [& K$ C
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    4 G! `8 J$ ~* S: Y1 P; F
28. #include <linux/types.h>
    9 ]2 }! M/ t: S8 ^
29. #include <linux/interrupt.h>
    3 D, B6 T7 _3 o
30. #include <asm/io.h>
    2 r! ]2 @: W8 I! j0 g) t
31. #include <linux/moduleparam.h>
    $ }9 z, I2 R- J# d; p( d
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    3 U; a1 a; U+ }! ~9 ]
34. #include <linux/dma-mapping.h>
    $ H/ F0 Q8 i. q& T4 }# x
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    6 ]+ j: y. {3 }+ {
38. #include <mach/irqs.h>
    7 E; B# Q6 f. n' [! s3 C& l4 J; c& d
39. #include <asm/hardware/edma.h>
    
40. 
    " d9 o; M& Y% N1 s7 v& B1 d
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    / l, m, \& O3 Y) ^" U
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ; L( `1 w1 E% s" E
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    . m: N7 W$ W( u) N& _* \% w" i3 b% ]/ Q
48. #else
    
49. #define DMA_PRINTK( x... )
    - I& B$ C8 \5 X$ l5 T9 S4 u
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    - i2 o& y9 z8 M/ O# `: }4 d7 I! @$ n
52. #endif
    
53. 
    6 b* m0 o/ J& }+ Q/ T$ c4 e
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    7 R4 p% s+ G/ m7 m
58. #define TCCHEN_SHIFT                22
    7 T2 Y; P+ U0 p) _
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    * N  L0 K+ y7 o' @! E% c: y+ g3 B3 m
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    + R3 R+ w" A) w' f
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);
    2 L' p3 G1 E* ]8 e8 t! H& U: }
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. 
    $ w# I9 K0 w9 J) I" }& a8 K
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    8 F# \' C3 m1 p
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    , T' P4 X, N5 W, n# J
81. 
    . N" @' o, ?! Q( b
82. module_param(acnt, int, S_IRUGO);
    3 h& n4 C0 J. R+ O5 R
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

. D  m$ K" c1 t# p- B+ C
9 o. D: w8 d) V% Q( x      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。
/ o. k' S/ t8 l  D( r  V6 Z     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
4 J/ Y7 O! k5 _  p: q' T
% b9 c3 R3 _& r0 Q+ m7 i, P/ r1 S4 c7 H. g
0 ?5 M/ C+ h4 q- P