OMAPL138如何在Linux下使用EDMA3驱动

yyj

; l' p7 ?- ^6 K( }( p8 y" _$ ^

1. [code]EDMA sample test application
   % S0 b. |8 u& `7 e5 |& E9 q" d
2. /*
   8 d, W  X8 D2 g  i$ Z) r
3. * edma_test.c
   # P! N) ?* w$ U$ j
4. *
   
5. * brief  EDMA3 Test Application
   ! t, y9 Q7 S* l1 I" c
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ! \0 }9 x- e0 g  F  c* F3 [( J
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    " g! p+ S% {( ?$ Y% O0 Q# U
11. *         TO CHANGE.
    ; Y# `1 h" Y' e- g" K
12. *
    - q4 O/ o* v6 n# R6 r; d- n
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    5 G, d7 o9 y/ {, \: x+ \$ _8 g
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
    8 W5 ?. `$ }# r! o7 C9 D2 W
17. * published by the Free Software Foundation version 2.
    1 H3 H: L/ j' r1 _7 z
18. *
    ! J. u( i! E: N3 h  g
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    . y1 B7 v) F5 p$ }
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    & Y. J# Z/ ^# B- g" j4 R
22. * GNU General Public License for more details.
    / W) W% O) d' B( I
23. */
    $ {/ V& h% _: I9 \) T
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    ' G( @; ?1 C+ G/ x$ [7 u0 }
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    # u7 Q' E; }+ E
31. #include <linux/moduleparam.h>
      H$ e8 U$ ]. N2 _
32. #include <linux/sysctl.h>
    ( H  U, J0 z- s" x  u
33. #include <linux/mm.h>
    7 s& [% D. a( r" Z+ A6 c
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    8 ]6 u8 V) B- R' P! e9 I
37. #include <mach/hardware.h>
    " n7 t- e. F( `4 Z9 u6 x
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    6 z% s, n4 \: H/ [% b$ l8 D1 D
42. /*#define EDMA3_DEBUG*/
    " S' B9 F$ y: }$ o! v
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ' B; q: b/ y# [2 }3 y$ u, c
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    * C1 Z% r/ I7 b6 M1 \1 a8 ^2 i  g5 l
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    4 m& v: J3 |0 I
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    ! r% Y9 ]& j- }8 P
55. #define STATIC_SHIFT                3
    + a3 {. S* a# k8 b% H0 H
56. #define TCINTEN_SHIFT               20
    & b$ u- a" Y( Q- z5 D- D- H+ W  i$ g- j8 _
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    ; b2 d- b, g1 v9 ^
59. #define ITCCHEN_SHIFT               23
    ) m2 M3 @, v7 E8 |/ Z0 Y- G- L$ t9 ~
60. 
      c) t9 O0 h/ F4 P- q# H
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);
    4 ?4 B/ d  \* ]4 {' B' Q( E
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
      u; F* z' y7 X  Y! m1 f( k
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    7 i2 l: n0 u. A/ @) }
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    4 M9 |8 }6 g  h
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    1 @) b- b0 }2 E+ H: F" F( H
72. 
    
73. char *dmabufsrc1 = NULL;
    . w3 \/ B3 A# w2 l, D/ S
74. char *dmabufsrc2 = NULL;
    # F# ]6 j4 Z4 y
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    ) J3 C; ?- K; ^" @  @
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    % r2 x: S" U5 y) @% m. Y1 V+ {
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

: Z* w9 \2 a& o( V
4 T% ~  W9 E: S; C5 D      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。
# p0 L( a' P( N* \3 s     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
4 }, g& h  s5 _4 @& \
5 P8 c( l- w- B: n* [