OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   # Y" U$ x* r( A" c
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   4 B3 Q5 c5 {7 X0 [6 q0 j( |
6. *
   " N# g( q& R+ Z) v; X
7. *   This file contains EDMA3 Test code.
   - ?) R% R8 w% M; q) D. U
8. *
   : Y! h& W* e; x4 t# R, B! ~) I
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   - U5 v, F  n6 r2 v1 P4 A" J
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    ! U! X2 Z: p  K2 _7 x
11. *         TO CHANGE.
    ) F+ d/ X! a9 d6 t& w0 H2 P$ d
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    / P0 f; ~6 S# Y$ L: A
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
    ; ?2 G8 H% ^2 d+ u9 G" f
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    ' p. `3 M+ H/ P9 t8 o/ F  a
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    - m4 X2 k* o0 K( C; }: b# x4 P
23. */
    
24. 
    . w2 e0 B3 p2 S0 Q% b
25. #include <linux/module.h>
    / e% H! m9 F* {5 w2 o6 R2 T6 @- O
26. #include <linux/init.h>
    6 Y* R/ X6 C! r, w" K; a/ Q
27. #include <linux/errno.h>
    / J5 [7 h3 W; v! g  t1 L3 j7 m
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    . U- B6 S( {& ?. s$ Q
32. #include <linux/sysctl.h>
    % l! Y- S: I: S0 j3 G4 u
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    ) z+ S  {6 d' \# u
35. 
    
36. #include <mach/memory.h>
    4 Z) k: x+ Q0 `( E$ c6 c' X. s" m
37. #include <mach/hardware.h>
    ' J3 M7 M: E$ {+ A* H. A/ y
38. #include <mach/irqs.h>
    0 B* i4 t% M5 ], t# M
39. #include <asm/hardware/edma.h>
    3 ^& u/ t$ c) j2 o* b. ~7 S; L
40. 
    
41. #undef EDMA3_DEBUG
    + B* e/ A: p& @& h# O* {* d; a8 p
42. /*#define EDMA3_DEBUG*/
    8 ]- B& V$ e9 K( N) Z6 a* E  E
43. 
    7 G$ C* P" k  L" f0 k- G
44. #ifdef EDMA3_DEBUG
      \9 t9 o# Q$ r1 S3 n5 p
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ' i4 h- p9 {! H7 D- c' `5 c
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    8 R; b( ^& u9 b- i
48. #else
    * J# G: A1 e3 `+ x  G$ A( d
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    % t. V: q8 c! r2 `& f
52. #endif
    4 d. ]8 V% Z3 |% H- x! e" p
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    & g3 _! S& h8 K2 d( b, h
55. #define STATIC_SHIFT                3
    ) @2 a/ [* c- z4 _2 V% O8 W
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    6 O0 Y: [" j7 A
59. #define ITCCHEN_SHIFT               23
    
60. 
    & _" _, A. S$ n' G: n5 K
61. static volatile int irqraised1 = 0;
    ( ]- N% H4 H$ Y7 c) T
62. static volatile int irqraised2 = 0;
    9 r% B$ Q7 X9 H6 G8 o! g  |- r, F
63. 
    / l6 o% T* c; _
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    2 P) J! g; T4 J' U1 T
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);
    $ v. j5 }) F. N8 C3 P; M
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    ; `$ }+ {+ p  K7 }
69. dma_addr_t dmaphyssrc2 = 0;
    , R# G' c0 U" }7 i$ X8 v
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    ' F8 E. L! `6 J' W
73. char *dmabufsrc1 = NULL;
    * s8 l( C6 c1 H0 w' z& g
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    0 u2 J; w, t0 w- p3 z
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    ' N5 C9 L5 U  s" ~1 E  g
80. static int ccnt = 8;
    0 }7 p. x5 J! ^- B
81. 
    ( N  L4 ~# W- Z! e4 p2 R1 Z
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

. H/ \' |( V: e: t      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
" h5 g2 P# L$ r0 Carm-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。
& I# `$ E4 p3 s0 p     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

, `+ b% u( r4 C
) j! J2 T: S: y, r