OMAPL138如何在Linux下使用EDMA3驱动

yyj

* w5 P) y0 Y- L! a9 s, X4 z

1. [code]EDMA sample test application
   3 W" N: q! ~) m
2. /*
   
3. * edma_test.c
   
4. *
   - v7 m5 F4 X8 \+ ]% P( i8 R0 m3 e
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   $ d- R1 G# U6 j3 A
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    
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
    / ]! p8 R$ i0 m! o
17. * published by the Free Software Foundation version 2.
    
18. *
    # L3 V) {* Z& q/ _
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    9 z$ h( |- j1 ^+ K1 k9 ^1 @* y
20. * kind, whether express or implied; without even the implied warranty
    5 v# Q8 \! o/ B6 ]9 s
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    0 v1 M. m( @0 x' g4 d
23. */
    . U0 u& u: x# W% S
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    0 k# ~! I2 O& ?, p
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    ) o/ i" V4 u2 U6 a# I/ I
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    ; Z4 X% N: h+ e; A
35. 
    & x3 C3 h( J0 f9 _& J5 Y( O- Q
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    6 g  u9 @9 f+ C, I# U+ U
41. #undef EDMA3_DEBUG
    - O7 O8 d% H$ u5 L
42. /*#define EDMA3_DEBUG*/
    9 w4 J3 u# C- y5 k% Q
43. 
    
44. #ifdef EDMA3_DEBUG
    & ?; F7 V: l  A- \' L( p
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ( Q2 U% T, p7 ^1 V) m
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    / d( q$ G  u1 S' B% W' u
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    6 S- M2 A$ _+ P* I/ o
51. #define DMA_FN_OUT
      N3 }/ P1 l0 @! z2 R" H; ]4 u
52. #endif
    ; B/ L; o; j* e4 j
53. 
    $ [' F6 _# X3 i4 ~1 |6 ~; U
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    % G3 {4 K9 A* z+ V7 V( l4 L7 A
55. #define STATIC_SHIFT                3
    6 _$ a' |6 ]9 F( x
56. #define TCINTEN_SHIFT               20
    : t7 E) k; X0 v  P2 u- A1 }. X
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    3 U! K5 ^1 p2 N; e2 l6 y5 h4 G
60. 
    
61. static volatile int irqraised1 = 0;
    6 B0 F; M% D8 z; X( n
62. static volatile int irqraised2 = 0;
    # S% y3 Z8 E4 h8 l
63. 
    
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);
    9 U1 d' [$ u# p% [3 \1 i8 k# m
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    ' G0 E: m$ h+ ]
68. dma_addr_t dmaphyssrc1 = 0;
    6 ]- [) S. O# v6 {3 h5 n' r1 {* l# x
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    2 O! ]6 m) h  x6 P+ c; f
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    4 Z0 C" ~5 z$ ^; m  W+ d5 ~) V3 S# V$ k
78. static int acnt = 512;
    
79. static int bcnt = 8;
    / y) X3 R( g1 a
80. static int ccnt = 8;
    
81. 
    ( O) c1 l. p5 M% W8 B# W5 c8 P0 y  ^) ~
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    2 y. L/ Q4 S7 Y* ?  P6 N
84. module_param(ccnt, int, S_IRUGO);

复制代码

1 Z; Q0 f0 r- j, ?. E6 u
8 |! E$ T( N: a; _      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。
& @) \7 u4 W" Z) ], X: c  V     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

5 R: s& C' i" I  P