OMAPL138如何在Linux下使用EDMA3驱动

yyj

, W, ~1 X1 |( Q+ u& C+ o$ F

1. [code]EDMA sample test application
   
2. /*
   5 J  i8 h' Y  F6 ~
3. * edma_test.c
   + \4 `7 b( c1 o" D, r* w
4. *
   
5. * brief  EDMA3 Test Application
   ' d0 @  w) J1 Q& v6 D6 o
6. *
   
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
    ( H, }9 \9 E& x$ K* C
11. *         TO CHANGE.
      M: \2 _, c& d/ L. L' w! o
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    6 E# x! h6 H$ j3 H, ]$ O, p; L9 i
15. * This program is free software; you can redistribute it and/or
    ' K. V( E, x# Z& d) U6 {2 r
16. * modify it under the terms of the GNU General Public License as
    / I) K7 [1 u% ~
17. * published by the Free Software Foundation version 2.
    + l  ~! `5 k' _
18. *
    ) P; h+ G$ v9 Z" y% ~9 A
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    0 x+ n* j2 V" f. `9 |
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.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    . w: r  d+ i/ \
27. #include <linux/errno.h>
    / m" z; w. p( Y8 t& G: o
28. #include <linux/types.h>
      y6 u! Y+ Q' I7 g4 I2 a" s
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    9 x3 H/ o- K! ]0 U
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    & J: z" N$ @% l& A& w
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    / w/ o8 ]- Q2 _1 Y4 _& R& z2 z
38. #include <mach/irqs.h>
    , k" t8 G2 ~7 H
39. #include <asm/hardware/edma.h>
    * f3 l# z3 j. d) L! _: s# M; l+ x
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    5 ?1 m) h& |' F
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__)
    ' j+ i/ e9 x1 e9 O8 M6 x) Q4 j1 N
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    2 ~4 a3 E' q& O( D
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
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;
    4 y+ M* B2 ]: E0 F5 S- C9 @
62. static volatile int irqraised2 = 0;
    ) U* L6 T1 d& k) z! P' J, ^
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);
    5 W5 u9 U8 T% q9 f  w0 P
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    ' U. @  q: D( Q
69. dma_addr_t dmaphyssrc2 = 0;
    5 l. w* Z* a& \! z9 ]
70. dma_addr_t dmaphysdest1 = 0;
    4 e5 u" [. X) r& k! K2 i5 k
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    7 [& G, K4 b/ O0 N" J
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    . G# Z4 u8 U0 w7 G8 a- e
75. char *dmabufdest1 = NULL;
    ; L  J  ^" k! @
76. char *dmabufdest2 = NULL;
    ; r& A( p4 W5 y
77. 
    6 |- L' p) B. `* r" d
78. static int acnt = 512;
    
79. static int bcnt = 8;
    : |5 j' ]( ~4 B# m9 d8 n
80. static int ccnt = 8;
    # m2 M+ S7 d  v% N3 z! B! O
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

6 |; l  m8 t6 `$ K' N" ]
      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。
- H6 P) i% ?& Q. \     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
# @2 g$ T' g- n! m: K! p
2 X$ e! ]0 m* v& [' E, B; [. m
8 C( ~5 X7 W8 G  n/ z6 y+ }