OMAPL138如何在Linux下使用EDMA3驱动

yyj

1 G, m( A  ~2 u3 H- D7 p

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   # x% q! y5 r; l: P
4. *
   
5. * brief  EDMA3 Test Application
   ( z9 b; K7 q6 v( o, N
6. *
   
7. *   This file contains EDMA3 Test code.
   . J' }' N$ x5 h! R5 o2 H
8. *
     Z/ O  N' Q) }: f0 `% u7 u: x
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   $ K& L! G2 N! A3 S* G
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    # S$ P+ A) f. |/ }4 B1 a, @
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    3 r  H4 I4 w+ F  x+ y
14. *
    
15. * This program is free software; you can redistribute it and/or
    # y+ ^# f# o5 h" q. U: z, {7 K3 T* s
16. * modify it under the terms of the GNU General Public License as
    2 @' c( Y0 t! U" ~; J# w
17. * published by the Free Software Foundation version 2.
    ) ]; s! V% j9 l. h- I/ H; Q
18. *
    # r4 B  C4 Q# N. F2 K: ]  L
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    & |: \+ G7 W: I2 s  R+ _3 \' x
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.
    : ]6 g, W  `  x. n' I' |8 h, p& u
23. */
    : V/ M8 l! V$ N$ G
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    + M/ v. I  F1 ?; L
28. #include <linux/types.h>
    ) b1 Q! \7 [( h7 K; c1 B  W
29. #include <linux/interrupt.h>
    ) H% ?* V; E& W3 k) i( E3 c- u
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    ' L" }" E" }0 F4 v# L- t4 s3 _
32. #include <linux/sysctl.h>
    4 |, j  a1 `& d$ Z/ @# t, P0 w1 Z8 X
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    + ?- ~$ d, Y: u- q4 Q/ e: y
35. 
    " [% J2 `; n1 v/ g% F) e6 @3 i
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    9 g' q7 Y3 h, S! j9 ~* w
39. #include <asm/hardware/edma.h>
    5 ?9 t+ o; H4 N6 X0 [: H! S9 X
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    . `4 U& E1 O- ^1 ]& S6 S
43. 
    , A* _/ t+ `# Q+ O
44. #ifdef EDMA3_DEBUG
    ; Y* o5 _. A' z9 |/ {7 s. v7 @0 E
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    # U! a; G9 \& ^7 R* w
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    8 @0 ]7 \8 j' v( O* l& l, [5 h" @
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    : p# c1 k  U7 l( C$ A( H3 F! D' P# ~
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    2 i+ C( K3 }; x9 n+ K& r
52. #endif
    : y( K$ t$ A: w& w; x
53. 
    7 Z+ t& z6 C" n% x1 V" _# G
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    4 w6 Q* Y/ P; O% k
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
      [. N7 y; j* \, P; R* m/ f+ c
60. 
    1 ?$ E5 l% o) W/ c# ]" J9 B, I6 u
61. static volatile int irqraised1 = 0;
      S( z5 H# ~- a. }" E
62. static volatile int irqraised2 = 0;
    5 d4 J  |) U) K0 ]$ k4 r% o& G3 ^
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);
    
67. 
    , y% V0 L. K0 ~
68. dma_addr_t dmaphyssrc1 = 0;
    6 ~  w2 c  I0 v- X0 K+ m( O
69. dma_addr_t dmaphyssrc2 = 0;
    % z6 L* Q4 `" P# g% a& ?
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    4 m' O1 y0 ]3 P6 a
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    % H" O  S8 T7 a$ s* o) g/ T6 v% \
75. char *dmabufdest1 = NULL;
    3 y5 X& O! [  f2 J9 w8 M8 _5 R* I
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    0 \4 x) r' \; F2 ^; s' k
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    5 n6 O: T4 Z4 m( ]+ B
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

2 X! W; d9 W0 f/ j- X, D
      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
- W/ O+ u8 q. m/ T$ J3 Iarm-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。
! h: j0 r" F1 U     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

5 F4 P2 t7 q1 }2 c/ c+ D  Y