OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   8 j( y! {+ U4 O& f. ~
2. /*
   : H- J  H3 q( D1 e( i
3. * edma_test.c
   ; Y6 ^5 r: @4 G: A, |: D; [
4. *
   
5. * brief  EDMA3 Test Application
   7 o# E0 I5 B% f, s% ?
6. *
   , X, J' t1 V2 C+ f, E
7. *   This file contains EDMA3 Test code.
   / X" m% D" L/ S2 u3 X* H0 U) x" ~
8. *
   6 A' T5 e5 r, g. _
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.
    4 ]% C- G0 ~6 o
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    : u6 s2 k# a4 V5 ~4 P  O3 s
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 ~$ r; ~! B: Z9 Q8 ^
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    4 ~' B$ u- F1 T& x
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. 
    - V. J$ s3 e5 o5 j$ Y
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    7 a3 h2 V! Q/ S0 g4 |3 E: H
29. #include <linux/interrupt.h>
    6 ^( J9 J* P3 n
30. #include <asm/io.h>
    " x. C8 n5 x- N( n
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
      ]" A+ X& Z% l* b4 n+ G
33. #include <linux/mm.h>
    " y$ L& m$ c$ d5 \; a8 b
34. #include <linux/dma-mapping.h>
      Y0 S7 @, Z+ c+ h; G  B/ F$ C: _
35. 
    
36. #include <mach/memory.h>
    ( @1 d* ^) M" L; z& h; n8 O
37. #include <mach/hardware.h>
    ( B! b6 Z# E4 u
38. #include <mach/irqs.h>
    % k$ O! T" @2 G0 X& Z
39. #include <asm/hardware/edma.h>
    
40. 
    7 e2 `! C1 E/ o. v
41. #undef EDMA3_DEBUG
    , G6 K" l- g2 P2 n2 L$ v; ]
42. /*#define EDMA3_DEBUG*/
    
43. 
    # V( a9 i9 L& W
44. #ifdef EDMA3_DEBUG
    $ l) b0 e4 ]4 [
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    2 e( y9 R9 s0 {! K7 A4 r4 e
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    ; ?4 |$ S3 d( F9 m
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    3 Z- z. T9 T' W( t1 G# D4 l
49. #define DMA_PRINTK( x... )
    # m5 T, M0 k3 M$ L7 Y: Y
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    ! y% Q# s. V! u; u5 \4 b
53. 
    * S7 D  v4 r& Q! Y
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    " w  s0 `0 Q, r( J* [: T& _# n- ~
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    0 l- y" N: y) G: N* K/ O' ]
58. #define TCCHEN_SHIFT                22
    ! ~/ w! G% l' L& `7 q
59. #define ITCCHEN_SHIFT               23
    
60. 
    ; H5 _- ?3 I8 @6 `( O
61. static volatile int irqraised1 = 0;
    * ?; B. M* W5 v
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ' R- ?" l: \9 y5 [; o4 K& _
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    $ n7 [9 ?" ]" S: O# g0 ]" k
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    9 d! k' Y& t' M8 l' B
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    8 b0 a7 ^7 f+ _2 u5 l0 H  Q$ S( p5 E
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    ' `2 p# Q6 t8 e' D# J9 @
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    & Q  M4 T, Q* k  E' G) _; W+ j8 A
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    # ?9 h4 C$ q4 a
77. 
    8 j, `  {2 Q3 l* ?$ w% i
78. static int acnt = 512;
    
79. static int bcnt = 8;
    ! m1 ?) d3 K% v0 j. k+ B& r& o
80. static int ccnt = 8;
    . Z( [7 ], M/ K2 |
81. 
    
82. module_param(acnt, int, S_IRUGO);
    3 ?% N$ x* a8 G7 u. p6 Z" |. Y
83. module_param(bcnt, int, S_IRUGO);
    1 U  S; p$ Y2 e7 k
84. module_param(ccnt, int, S_IRUGO);

复制代码

1 ^# }% z. U. }  x      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。

& C5 ~, D' |/ |* i+ H3 Z
" x5 H/ ?+ i; V0 }) X