OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   " H* Z( x" t9 ^. p$ ~! Y0 e
2. /*
   & }! G+ m  g$ M: l/ Y
3. * edma_test.c
   $ z9 U' z  o4 p! {; [+ W
4. *
   ; ?2 S6 @% F1 d3 J! H7 C1 R! B+ }
5. * brief  EDMA3 Test Application
   ( q1 p7 x' y) l" {  H9 K
6. *
   ; P$ n2 A* v  d) i( o7 [
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
    ; Q* Y! }2 ~0 }: A
11. *         TO CHANGE.
    4 R) ~. U4 i% f3 n
12. *
    , ~# ~% c. n+ t# \5 n$ I) Q$ K
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    5 {3 t9 W/ ~3 o; G! S8 S
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
    
17. * published by the Free Software Foundation version 2.
    $ }* G4 E  U  W
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    ) R# r( ?$ q, _; H
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    & k  l3 y/ \* i! j/ O
22. * GNU General Public License for more details.
    7 C1 N4 `& K5 Y" `: J! j
23. */
    
24. 
    . D6 @) V! M: ^' C& i) x7 u
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    : q1 d6 Q" L  B4 M- Q/ u
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    & W2 {$ P+ W4 q
31. #include <linux/moduleparam.h>
    ' z' @: V2 J' M( s3 u4 w
32. #include <linux/sysctl.h>
    : r! R1 C9 i( i: }: }4 \5 K& T
33. #include <linux/mm.h>
    ) ~  e0 b" ?3 ]! \/ z$ G
34. #include <linux/dma-mapping.h>
    
35. 
    5 A8 _% O8 M8 ?* ~$ z3 q
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
    $ o" f( g& a2 O# [2 `' t
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    * j) Y+ f. k- ]
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    , ~) q( x4 J. f. |0 w
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    - n7 L  }0 E. t# z
48. #else
    ) V5 d7 P/ s! d0 E+ I; c% t+ j, s5 O! d
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    ; C* ]3 L5 r9 A/ X
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    ( [& r. ]# A$ n3 f4 C" Y& X5 K
55. #define STATIC_SHIFT                3
    2 p+ u& T( M* [! ~" v6 `
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    ' w7 j9 [) Z2 O% e5 |, G* \
58. #define TCCHEN_SHIFT                22
    1 |2 D3 n: d) ]! W" E- o5 [
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    % h8 k  B1 C& |8 A4 T+ b! G
62. static volatile int irqraised2 = 0;
      A4 u2 l0 J( x, F, ?. G0 X
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    * I  `5 q& [+ s& v
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);
    / w  [2 c; \" A
67. 
    ( ^+ R2 Y1 U: X7 W% v
68. dma_addr_t dmaphyssrc1 = 0;
    # |" t6 `7 E8 _! V/ x5 c- j
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    9 A; {4 I+ V7 G  w# T9 c. z& a$ ^
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    & |5 a+ p6 U3 g' J
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    2 k) L- [. S- |; I" L
77. 
    : H5 p$ Z5 o( W  }. I
78. static int acnt = 512;
    + J: `; M; X2 ]' m& C
79. static int bcnt = 8;
    0 u- A' _+ _* [9 j# X
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

: n- c- ?, a9 W1 t1 T& 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
( v+ B+ K: C9 X. y3 harm-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。
0 E" V1 g* M( i4 G& u7 w& |     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。


. Z. ~  t- i" E* i+ {5 n