OMAPL138如何在Linux下使用EDMA3驱动

yyj

, T1 N# ^- k2 y7 |3 m

1. [code]EDMA sample test application
   ( J0 ^1 S  t6 ?5 y
2. /*
   
3. * edma_test.c
   ; P. C3 U# _' {- H$ c
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   - F2 G" B# W; o; ^9 \5 n# _3 d' f+ m
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ' I& y) C( U) ~3 O& u. N
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    ) S+ U! R7 T  J6 Y! b
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    8 U) C! z$ e, q9 i: {
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
    6 m, W: P+ S: \! \2 k
17. * published by the Free Software Foundation version 2.
    9 G: G1 |# m6 X( W" b9 P% p3 F6 a, |
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    : i  ^3 N! v3 s; ~1 l$ b' u
20. * kind, whether express or implied; without even the implied warranty
    ) P% b* Z( x1 y6 r; u: g, E" S# k
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    6 h- n  e5 K9 K( g
22. * GNU General Public License for more details.
      M. b: T2 Q/ e! ^
23. */
    
24. 
    
25. #include <linux/module.h>
    ( F0 e7 u+ s) o* M- e
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    9 {' x' k  F2 t: p* b; w
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    + V. E) V6 w# r
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    - w# n6 j& [& I
33. #include <linux/mm.h>
    : e* L3 }$ I( D: p) i
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    7 r' l- T: j6 D5 J" y" j
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    3 [" M. `1 E. J" e2 G/ `( z9 T
39. #include <asm/hardware/edma.h>
    - k5 U1 o: O8 w0 p/ E% p
40. 
    2 l% z( F4 i+ y. {1 X; {3 ]7 X3 w
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    ( \- o/ ?8 G( g3 L+ X
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    & d( I4 Q7 C5 f
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    0 |6 y% W0 r& b4 G+ V6 p
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    & h& H% z4 O0 J& K; R( ~8 o& @
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
    4 r8 I5 \7 z% D) v, g* c
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    2 U. Z. S( e/ i; b( r
59. #define ITCCHEN_SHIFT               23
    7 B2 W  r: H7 x* c$ B; E
60. 
    
61. static volatile int irqraised1 = 0;
    # L+ k$ O! ~) ^  o. K+ b8 g7 c
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    9 w* L  ?) I# W4 t/ }5 h
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);
    1 x* x/ t' H. Z7 c0 A2 E
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    ' U& D5 [: W7 O, r
69. dma_addr_t dmaphyssrc2 = 0;
    ; t# N2 Y' b2 b+ \
70. dma_addr_t dmaphysdest1 = 0;
    , @: [4 J) g6 Y- [" o
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    ( o- a. }* D9 U$ `2 I/ S2 ?! u
73. char *dmabufsrc1 = NULL;
    - X8 h$ c* l% }/ w4 ~4 M* Z7 o4 e
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    4 G9 l0 k$ Q4 Q% B7 }& L) R  }" Z
84. module_param(ccnt, int, S_IRUGO);

复制代码

  K1 {' G/ V: t( G  ]( r  q4 x, ?
& w) }+ t, c6 C2 s      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
: \) m) d/ Z# i+ q5 g: sarm-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。
" f# ^) w; G' l6 B
* t& N- t' S" Y3 c, U+ J
1 [# b) A3 N, K3 v% C