OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   & f. S/ v+ k3 q
2. /*
   
3. * edma_test.c
   / }8 X& A3 J7 ?. }) j, M- W
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   : L4 |0 t( c% T
7. *   This file contains EDMA3 Test code.
   , t- R* r: C. h& I% _
8. *
   
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
      i8 Z* u: y; {* p% S5 m: r
11. *         TO CHANGE.
    
12. *
    % x- [3 f% b5 B3 x9 }. w
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    3 v0 m0 S$ |% l
14. *
    ' T2 x+ |: s6 E3 F6 a$ J' K
15. * This program is free software; you can redistribute it and/or
    1 I2 b0 P7 ]" ~# i, {
16. * modify it under the terms of the GNU General Public License as
    , u; B6 K# Z, x9 F0 D6 e
17. * published by the Free Software Foundation version 2.
    
18. *
    ! ^( e! Y" U/ v0 l0 O# e; t3 K
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ) y8 S9 z1 L: L* [7 `8 }9 b
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    " e% H  R9 m2 d" F1 R0 `3 t# X. J; b. Y
22. * GNU General Public License for more details.
    9 J) k( H/ [5 R* Z6 Z; a9 @7 i
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    ' i4 a' j  ^) o
29. #include <linux/interrupt.h>
    / y8 C2 x' p; N- u% s- c+ w0 e$ f
30. #include <asm/io.h>
    # [) {& k* x/ |9 K8 X/ D2 x
31. #include <linux/moduleparam.h>
    % R  N6 N4 `: Y; M/ L
32. #include <linux/sysctl.h>
    6 B& \1 M3 J# G; O  C8 F/ {
33. #include <linux/mm.h>
    5 m# n9 r3 W1 v% H9 C  m
34. #include <linux/dma-mapping.h>
    $ X7 i6 }: w0 e, t( W: j6 l
35. 
    8 p6 g. a" h* m
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    3 ~: S9 i$ W! L  ?
38. #include <mach/irqs.h>
    * h# R3 L( I' ^6 d, c0 ]
39. #include <asm/hardware/edma.h>
    - E8 O5 A. X: o+ C" B# K0 R  N
40. 
    
41. #undef EDMA3_DEBUG
    3 J% I7 i" a* z4 n9 I8 c' j  x6 \( D8 S2 Q* }
42. /*#define EDMA3_DEBUG*/
    
43. 
    * A/ S8 p0 R: X; ^! o+ q  n% n! j
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    7 L+ d% c" l' Z' g. v; ]
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    : M* z) G3 A" J, _/ t
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    9 ]  ?/ `& E5 N! I& @5 [5 |. a
48. #else
    
49. #define DMA_PRINTK( x... )
    & D6 y( d8 R0 f9 O5 o
50. #define DMA_FN_IN
    ) z# |1 z# d4 `9 c
51. #define DMA_FN_OUT
    - d( {* K, v/ w. \9 e+ ?5 K" C
52. #endif
    
53. 
    / J" M2 @1 D9 ?7 `+ F0 [7 I5 L
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    % S+ d  L! M* J! J/ u
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    # b: y  o# x5 S8 `" l* E# C% H
57. #define ITCINTEN_SHIFT              21
    3 {; C5 G: G- c' H) a: t
58. #define TCCHEN_SHIFT                22
    2 ?9 t" M) J& U/ B& }. ?8 Z) D# N
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    7 I# f9 w7 V$ T6 t5 r
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);
    ( M3 v' A' i3 O* q, s2 A1 ~
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    ) k, h3 n- `2 w! R% y2 [3 y
69. dma_addr_t dmaphyssrc2 = 0;
    8 D4 Z& \) X1 X1 P" W
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    - j6 l" T5 Y7 k) j4 `5 L. ^) S- a
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    / M- O& i! u" D0 \# v% E
75. char *dmabufdest1 = NULL;
    & T0 A( s! A) J- k6 `8 ?( o7 T
76. char *dmabufdest2 = NULL;
    9 \" ~' q) r9 S, T
77. 
    1 r. d8 A8 @" p
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    $ L, O: m! g  G+ x  w% [( u0 i
81. 
    4 l- j. C' w7 k; `5 Y: A& {
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    5 I1 c8 e" a5 B/ H
84. module_param(ccnt, int, S_IRUGO);

复制代码

% Z/ [% F' G3 c% j
4 s% J, L, H" K* G! K. {      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
, O8 E) u8 [: D* C" Qarm-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。
+ k4 e: |9 w" j" ~# s5 e! `5 n     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 b, s( a) ?# E6 J