OMAPL138如何在Linux下使用EDMA3驱动

yyj

$ ?7 J4 A/ x' x* ~0 r" I0 I% i( v

1. [code]EDMA sample test application
   & f9 E# l: Z) x
2. /*
   
3. * edma_test.c
   # E# s) z5 i  b2 l5 ]3 _/ F4 }
4. *
   
5. * brief  EDMA3 Test Application
   1 Q0 \* s) O" p/ R8 ~# V
6. *
   ) g% y: [: P; T% g( D- L
7. *   This file contains EDMA3 Test code.
   
8. *
   9 b7 U) K2 H2 I; [  ]
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   , A( l( H1 n) ]* r1 y( c# ~
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    ' ?; y; [. X3 ^- _$ A
12. *
    ) Y" W' {! [4 m% j' v( Z
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    ! e6 \5 K3 A1 X1 N- n" O' T
16. * modify it under the terms of the GNU General Public License as
    ( p0 O& f: [- b# h: O( ^
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    4 m6 e: G) a' L$ d5 r) l8 d
20. * kind, whether express or implied; without even the implied warranty
    0 {) d  b! r! h- v; v
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    + U" ^. j' `3 \6 v
24. 
    
25. #include <linux/module.h>
    8 P2 a5 o1 ~8 B! o" h
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    6 R' Z/ a" I3 T' D( x, f0 C$ h% z
29. #include <linux/interrupt.h>
    5 I1 u$ V7 \( \) ]
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    7 [; F# p6 F& B1 [( S
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    $ F( f* p  l& ^5 M/ }
34. #include <linux/dma-mapping.h>
    : k% l% b7 R$ `" i" O
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    - S$ }0 U" L2 _) j- u
38. #include <mach/irqs.h>
    ( Z8 p& s/ C0 S
39. #include <asm/hardware/edma.h>
    
40. 
    0 o: Y, D% O4 V
41. #undef EDMA3_DEBUG
    $ K0 X, W# \  ^9 z
42. /*#define EDMA3_DEBUG*/
    
43. 
    & o! b- z2 E  F4 M" s' _
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    8 N* I3 p+ Y6 h; I
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    7 V: Z8 |) c. F
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
      O' S! ~; c8 V1 l8 B
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    5 k7 W" H' Z  F% K8 |
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);
    7 J" q' w% F! W3 [$ ^5 \% Z
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    * k! }& O. P" b
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    1 ^& X8 Z) D. ^. X9 }3 N1 C
79. static int bcnt = 8;
    ' v: p5 i1 n3 @& p+ u# q
80. static int ccnt = 8;
    , L4 M5 g7 G0 V/ d' c# u
81. 
    ( k! i" {  [' R4 S! W' ?4 ?
82. module_param(acnt, int, S_IRUGO);
    : m0 H1 ?% q8 R8 D9 \+ U) J+ e8 |. w
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

. I' `/ B. D! |4 E! [3 x9 V; G4 }/ g
      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。
( L/ K8 G4 T2 j  c( z# }; 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。
& c& }9 L% k1 z+ S
# D3 h3 C% |/ X
0 ]- ?1 O4 Z( ]; |8 T* ?6 y