OMAPL138如何在Linux下使用EDMA3驱动

yyj

2 u7 S0 B+ c. x6 j% j5 M

1. [code]EDMA sample test application
   $ _( q* O; s) Y8 h
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   " B! m: L0 ]# x& }! B
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   " H1 P6 ]4 C7 B
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   * \+ _$ z, Z8 r+ q+ b0 m+ ]) C
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/
    & d! y  a& P0 M
14. *
    
15. * This program is free software; you can redistribute it and/or
    # O% Y2 E, V$ \+ d9 H, s6 B/ Q7 v
16. * modify it under the terms of the GNU General Public License as
    " ]3 n) L- C. B$ H. o8 d
17. * published by the Free Software Foundation version 2.
    ; ^% X& S" h, `) n- f5 m# I* c. r1 d
18. *
    7 p4 ]3 s% V. I2 Z
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    4 p+ H8 R, \$ y. [' S9 X& }% E) ~
20. * kind, whether express or implied; without even the implied warranty
    , ^- N0 T1 Y+ \/ W0 W5 n8 s
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    1 |1 H2 p1 M, V( i' @
24. 
    
25. #include <linux/module.h>
    3 t5 f& P5 E) Q6 J
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
      C6 p3 x, b7 m* x+ V3 q- B! U
28. #include <linux/types.h>
    / s. I0 D4 H0 {$ }% t+ D+ a9 `
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    & F$ R! A/ f0 R
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    " m3 r( a1 Z- Q6 E% I7 h& i8 Y
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    , W7 Q. v; C% t0 u" c
35. 
    " l* S. E# t$ D; ^. J8 q0 T3 f& d
36. #include <mach/memory.h>
    . S7 S3 P# Z  O$ H4 @5 f, N
37. #include <mach/hardware.h>
    4 E; Y/ ^* J! T: K( a
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    7 z) ]. [* ^! h7 h
43. 
    
44. #ifdef EDMA3_DEBUG
    ' z% e, m1 R6 E  Z+ [+ Z
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    $ w6 t4 T! M3 R
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    ( w9 L! ^' R1 l  i5 ~' `
48. #else
    2 z/ p3 \& t1 k+ ]8 B! _9 k
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    ! E  p6 t3 l1 E; z; ^
53. 
    - p! w+ Y# [/ q; w  s1 B# V7 i1 @: p3 ^
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    6 ]5 O' E( w& L3 x
56. #define TCINTEN_SHIFT               20
    4 N" |# N& ^* |# |. _; ?
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    / s2 C2 p: h( @% m; Q
59. #define ITCCHEN_SHIFT               23
    9 E  q3 h( s  y+ S
60. 
    % a" {% Q7 c! ^! o, n- L) R& t' l
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    6 g# u3 l0 Y2 N; s3 ]
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);
    
67. 
    / i8 S7 z8 m2 t% N
68. dma_addr_t dmaphyssrc1 = 0;
    # L+ e7 D. e; T" u0 f
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    7 @0 r3 @7 O7 N% A8 k- }* C
71. dma_addr_t dmaphysdest2 = 0;
    - g5 Z, a( ^  O" C2 x) j
72. 
    1 w+ G4 C) h0 z) e6 V' Y
73. char *dmabufsrc1 = NULL;
    , P4 h! x  U. G$ F9 e* n& ~( u, D
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    1 m3 o9 K% P0 Y# S( u
76. char *dmabufdest2 = NULL;
    1 m7 v2 @, b8 k+ l4 Z
77. 
    * }4 z; h8 Z/ U: }! Y. Q3 H7 ~
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    + G8 C' [6 M1 Y( y+ n/ A& i
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

9 R2 P# R$ l7 I6 _* x
. s1 a+ x+ V% z  ~% |* y      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。
( f( O3 o& i' B' R     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。


/ @. }3 g  d" u* Q, ^  E# \