OMAPL138如何在Linux下使用EDMA3驱动

yyj

# x, J/ ^1 a) b! D% Q

1. [code]EDMA sample test application
   1 `0 I2 S. I2 \& L4 B2 ^! M
2. /*
   
3. * edma_test.c
   . e0 S$ L# Z6 z9 H2 ]
4. *
   # B# ~1 R* C8 W8 a* g1 D  L9 `. i
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   - W" j0 b2 C: w2 o0 U' D
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ( r+ G/ V; }" A% V, l; y0 d/ H0 W
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    : Z0 q- x3 k! Z/ t# S, |! W' ?
11. *         TO CHANGE.
    : d- R% ~4 P& }
12. *
    1 i; c) x0 Z* ~( W5 s
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
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
    
17. * published by the Free Software Foundation version 2.
    ' }) u0 ^: S; m+ a: m0 w9 U- \
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    9 N9 [" D; c4 m2 I+ A( H2 U5 R- y
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. */
    # M# X2 l( c3 Q0 N0 `3 l0 w
24. 
    9 ^# l+ E, k& }& q4 y, e4 G. Q6 g
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    % k) U9 d1 Y8 Q' y- a" v
28. #include <linux/types.h>
    : Y% A  T2 M; F8 r
29. #include <linux/interrupt.h>
    " H5 k: ], G+ F9 w8 x% a
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    ' [+ c3 K; O6 M9 N! _
35. 
    ' Q; j5 x% M' K1 R- q" f2 T
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    6 Y; A' P7 R8 `2 P! p
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
      S+ p) {: M& N* Z! T: b, m- p; ?! [
40. 
    , x* U6 A% T7 Z5 U7 p, K' u# ~
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    & Z# w- ~5 ~& s3 E) Q- d; R
43. 
    $ Y' v( x0 W$ j
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    . U% r% H8 E( c# `2 q) P0 c
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    ! {5 o- U! X" B5 k2 c4 ^% d. o  R
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    6 _6 w. p9 E( W% C
48. #else
    ! C: x! q+ q$ u
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
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
    ; d( ?$ j: k; E" U2 {
57. #define ITCINTEN_SHIFT              21
    ' l, t) b* g& g. x
58. #define TCCHEN_SHIFT                22
    7 f0 M5 ^- B' M
59. #define ITCCHEN_SHIFT               23
    
60. 
    + F) |$ n& ^& k$ {. @  x7 _
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    4 k: C( |* {9 P' y
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    8 C! F: g* ^, V8 U' }7 P# ]
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    : ~9 e. s5 V5 [4 ~
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    $ ~! t) ~; P. F" u6 R2 p" _8 `) \
67. 
    1 |) n0 n% Z. {8 ~% E3 j4 b
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    ! |! a" ^$ r( Q; s- o* R
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    8 A7 T' E0 c. N3 x5 Y- y) b
72. 
    " R4 d8 Q# h  A* |
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    . v* j" w  R. q$ G; J
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    ( r  l1 J5 B; l4 e# _3 h: V* y2 M
77. 
    % p$ u- o; U! j
78. static int acnt = 512;
    
79. static int bcnt = 8;
    2 Q6 d0 ~* }: b* `! E+ U: b
80. static int ccnt = 8;
    
81. 
    6 T, U# P) I. q0 O# K" b
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    1 a. h# D/ r2 K. T# \
84. module_param(ccnt, int, S_IRUGO);

复制代码

) J4 x( C" i* P: A) D/ z      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
5 G2 A, l* E1 xarm-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。
/ z! |: O6 ~0 g) I9 U     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
& _' Q2 S. Q( O2 }) c1 ~

  a5 Q/ F: E8 ?! J) ]$ M