OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   . H1 Z, R; |' m( k
3. * edma_test.c
   ' x/ b8 N$ a! S3 V, f
4. *
     [# z7 X# l7 Z" ~# R" L
5. * brief  EDMA3 Test Application
   
6. *
   * _; E! M" t6 w; ]! G
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.
    
12. *
    2 S5 T7 z1 y' O& ~9 I+ l& I0 m
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    & w4 F( |/ Q5 [- @- }
14. *
    / e7 ?8 s) ^& N6 ?" r! y. R6 M
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.
    ' c4 {/ l, m( x! `
18. *
    4 ]  s# a. f" E" |4 b! n
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ' i+ t% C* U) \! H) m
20. * kind, whether express or implied; without even the implied warranty
    ' o$ ?- ~" [- H$ X) N
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    + p! y* U8 a3 g$ E
22. * GNU General Public License for more details.
    
23. */
    & I0 u9 H$ e. t
24. 
    
25. #include <linux/module.h>
    + B. P4 }5 L; S3 e0 s4 I4 a
26. #include <linux/init.h>
    7 B' Y7 D* G, K6 o" f
27. #include <linux/errno.h>
    9 H3 V2 V$ Z3 W5 x( B) Y6 \0 T: t
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    5 X8 L. ?6 M$ z% J
31. #include <linux/moduleparam.h>
    6 T# ^2 f& Y: y' T  X; M
32. #include <linux/sysctl.h>
    1 j! U" c, A, x7 a( I( z& X
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    ; Q* A# Z7 O+ E4 z# l
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    7 S" Z% f! X- P+ ^  H
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    % y. o4 i5 x- T* B0 R3 b+ Y! u3 W2 E
43. 
    6 K0 f/ G& q1 c2 Z% a7 K
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__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    ! b+ C$ [7 g. O8 \0 }9 A+ ?5 P
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    1 @, g. L* Y6 e  G
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    . c3 E& U  X1 @# G5 H
57. #define ITCINTEN_SHIFT              21
    ; T! _) @: O. H& E0 V2 ~
58. #define TCCHEN_SHIFT                22
    2 o$ m6 v& q9 {" @" s& T
59. #define ITCCHEN_SHIFT               23
    
60. 
    / V6 |% Y" _$ g4 m
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    ; q) |* {& t) V" }# b
63. 
    ; F  N* a8 C6 G* c4 q( f
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    * p( c3 V- u2 g' d' J1 Y) @
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. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    . D) P0 E7 o, x& t) i4 ~
71. dma_addr_t dmaphysdest2 = 0;
      k4 v& T' n* |) i9 P
72. 
    
73. char *dmabufsrc1 = NULL;
    ; H8 k- P' o, `) G! d6 k
74. char *dmabufsrc2 = NULL;
    + U  w8 w- r0 `/ C
75. char *dmabufdest1 = NULL;
    ! o+ |# S! K. G2 |- F
76. char *dmabufdest2 = NULL;
    - s" j# e/ L% O) T, Z' L; g1 `. ?
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    3 `$ z3 t' L6 m7 U
80. static int ccnt = 8;
    
81. 
    8 q9 W$ W; T/ u+ E# f
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

# F) A" A' J' b- l8 ^
      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
" n+ Z5 [, Z3 z3 a& g6 e" Y  j# d4 L4 O9 Yarm-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。
' |9 \! s4 U) E/ A. j

( ^! z0 M' E; H- O; a6 Z