OMAPL138如何在Linux下使用EDMA3驱动

yyj

% O7 Q' P" p9 ^* g

1. [code]EDMA sample test application
   . l  v8 s5 [  r( X" A
2. /*
   ! [  \! D6 U, e8 t
3. * edma_test.c
   ' B- B( `4 q: P& c3 O
4. *
   3 _/ z( L6 u6 `" p- ^. _8 P
5. * brief  EDMA3 Test Application
   8 L: H5 s/ H9 j4 O
6. *
   1 |% p% n! r. W- L+ a
7. *   This file contains EDMA3 Test code.
   
8. *
   2 [/ q; c/ P* A0 C- i" b8 j
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.
    7 N% J) x  l3 X
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ' b$ f# {. ~+ E
14. *
    
15. * This program is free software; you can redistribute it and/or
    4 |6 B0 _1 X) A
16. * modify it under the terms of the GNU General Public License as
    2 F: e) i; H* I, D
17. * published by the Free Software Foundation version 2.
    
18. *
    0 }5 }: x  @' J* p  b
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
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. 
    7 |/ `, c4 [* `
25. #include <linux/module.h>
    . U0 X$ x9 P# F7 T4 H: u
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    ' }8 z; Q" ~5 Y: ^5 i2 n
28. #include <linux/types.h>
    . R7 M3 ?& j! E: i  E
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    0 I0 W2 v% c5 [* e& @+ n
31. #include <linux/moduleparam.h>
    1 t7 o0 Q9 a, O% ?
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    ( ~6 l$ h7 D$ s# ^
34. #include <linux/dma-mapping.h>
    
35. 
    6 Y% l/ _# i9 @5 G- M/ U2 f
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    9 u( R1 H! Q7 @! o0 t0 l
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    " }  L8 u4 B" c' K. c: x
40. 
    2 T6 c4 i* B. d+ ]( f
41. #undef EDMA3_DEBUG
    ) h5 s0 w1 g3 i7 s, G  G) m- z7 ^
42. /*#define EDMA3_DEBUG*/
    / {+ Q) k) f7 k; C0 y! B8 h
43. 
    1 i9 k4 z& p$ c7 Z. Z. J
44. #ifdef EDMA3_DEBUG
    5 i* t* j6 [. ?9 j" 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__)
      N# x& Q: [1 |
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    ; @: V! l* B2 B( n( x+ E2 X
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    4 D. b0 w% m) h/ E* {
51. #define DMA_FN_OUT
    0 q$ Z* H+ c) i6 y! d( q
52. #endif
    ; K" o, H8 `5 p3 n2 I
53. 
    $ o+ T9 Q$ [' l4 V4 K/ H
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
      f% r. @$ t8 Q, e& f3 D$ K/ F) n- M
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
      u. _" x3 }+ j  I9 y6 V0 A5 I" T
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    5 X. s% {/ @2 Z3 E- \* C
59. #define ITCCHEN_SHIFT               23
    
60. 
    7 L9 J/ g& ?  j. J) Z' e. c
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
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);
    " p3 E% E- T% [4 p
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    " T6 Y, J) S; w) U* M; Y; [' z
68. dma_addr_t dmaphyssrc1 = 0;
    + u( V! M1 l& V
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    / x0 ]3 `& l/ O& [5 K, u- t
72. 
    6 ^9 S5 l: G+ D5 b8 Q6 X  V. S
73. char *dmabufsrc1 = NULL;
      Y* \$ D: b+ G! m- `9 v
74. char *dmabufsrc2 = NULL;
    . S, Z1 w" G0 l1 ~; p" z7 r* z8 j
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    9 q" f% Q  ]+ L1 ?, K7 _
77. 
    % E# I; E' l) K' m
78. static int acnt = 512;
    1 H$ y/ n8 H4 D* J1 k
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    9 a6 L' o& @4 Z  C
83. module_param(bcnt, int, S_IRUGO);
    ; @; q2 H" y7 o5 u5 u. s
84. module_param(ccnt, int, S_IRUGO);

复制代码

8 R/ t; e! m3 ?/ U+ ~4 n8 Z; j
      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
% L8 p& y& x1 narm-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。

. C+ b, ?! e/ C$ _8 B+ w0 h
2 k0 h* Z% e9 w# a" v" x* @