OMAPL138如何在Linux下使用EDMA3驱动

yyj

! H* ]% }" t" r

1. [code]EDMA sample test application
   # R1 b. I) [+ b" R
2. /*
   9 C. H5 v  i6 ]# T8 w
3. * edma_test.c
   5 O* J% X1 m% n" m
4. *
   ( ~* g* g# O& h: ]! j
5. * brief  EDMA3 Test Application
   + c' A3 i- |" U
6. *
   8 Z" X% e* C$ y. i
7. *   This file contains EDMA3 Test code.
   ( D/ q, Q0 p9 p: o' u# ^
8. *
   % a, E3 p( k# e
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
    : V3 p, s& c* b
11. *         TO CHANGE.
    
12. *
    : d2 j9 h, _$ U2 @+ w4 ]
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    & Y  q, Y  N- S0 u$ k
14. *
    6 {0 o9 H* A% S! s. ?( w! N* A
15. * This program is free software; you can redistribute it and/or
    3 ~& T% H, O# }7 t
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    ! t( V: @. h  q' D( ^; `
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ) L+ D+ i$ d8 N* @; w
20. * kind, whether express or implied; without even the implied warranty
    1 F7 H. S: d& T
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    / S# a( D' d0 q+ ]* b4 h6 X
22. * GNU General Public License for more details.
    0 Y- u. I( u' z
23. */
    5 N9 }' X9 @. ]$ n
24. 
    " [/ Z! g4 @8 K' n5 L
25. #include <linux/module.h>
    * E" D& K- M" L* c/ Y
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    " X, g4 {' @" @; H; l2 ?# e
29. #include <linux/interrupt.h>
    0 O" e* x& w0 B- W; V
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    # A+ S& V5 p% }' K4 {9 v. d
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    6 i  q$ }' a! R: e" D% z3 o
35. 
    4 s$ z. j; w. S4 s6 R
36. #include <mach/memory.h>
    / g- Z# S( ~/ G! V; E# I- P* h9 W3 A2 {
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    . b2 p, ?7 }) v
39. #include <asm/hardware/edma.h>
    ; p2 @* M/ X# \: U+ i% D
40. 
    % Y: Q7 e( ?+ `" I8 t; _
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    3 a2 I+ X) f% Z; ~2 U6 U& S# w; @
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    6 s6 D0 V$ P( F8 C- G: B" f2 S
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    - r: k% u  q' i3 x
48. #else
    % R- i- k: a! n; e" O
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    ; [, y# {# W, c4 P4 c
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    8 z- U6 M: G$ R1 x6 k
57. #define ITCINTEN_SHIFT              21
    2 L8 o3 M2 q# x( z
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    , i% s# Q0 x) N
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    + `+ B- @$ a( b) u! i
63. 
    1 D8 J% f0 a% v) u" |
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);
    * H: g+ q, Q) c5 g
67. 
    ; G, G' _7 q  E! [
68. dma_addr_t dmaphyssrc1 = 0;
    7 L9 y2 g1 T/ R6 A+ V
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    , u' {) G" a% d0 Z' `- [1 Q6 M" L
72. 
    # a8 e6 u# q" I( h3 H( i. x
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    9 |! ]! v0 t* `: w; S2 y9 l
76. char *dmabufdest2 = NULL;
    5 t1 u1 Q2 `6 |+ p
77. 
    0 N" I2 v% B- z
78. static int acnt = 512;
    5 G2 K: n% e% n- r
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);
    3 ]5 E# C. J$ V* u5 y: k
84. module_param(ccnt, int, S_IRUGO);

复制代码

3 M( n! n0 J) G+ ]; U- a
" ]9 w: {/ \, x" s! w      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。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。


  A: |, @2 O0 A* r3 \