OMAPL138如何在Linux下使用EDMA3驱动

yyj

- m. b, O; B9 {0 T8 k6 ]5 q' v1 s

1. [code]EDMA sample test application
   2 S6 `( Y3 g- K- \) G
2. /*
   # T3 n; x7 G! M5 }) a8 z
3. * edma_test.c
   ( w9 g" g, C! z/ T
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   - I3 z) O: t6 I
7. *   This file contains EDMA3 Test code.
   1 Z  T! q8 }6 @" }; n. d
8. *
   4 y' `, n2 F  y
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.
    * O" @7 i2 ]5 [2 a4 l+ {& ?. Z
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ; m0 d" f" H! E! E1 I! l( f
14. *
    , R0 v+ p% j. v& E" \2 {
15. * This program is free software; you can redistribute it and/or
    3 U* f9 I& N- j% q! y
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    ( h7 g( v. Q; l+ H  z) X
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    6 G1 ^0 N( T. y) `& S* W# ~' @- A  h
20. * kind, whether express or implied; without even the implied warranty
    $ k6 S. M9 N" {, E. M
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    * G9 K- Q: @6 L- Y! _/ ?
22. * GNU General Public License for more details.
    
23. */
    ! ^+ P* V4 U9 O4 w$ k
24. 
    1 R# S1 w4 p& b8 L/ w1 J2 `) U
25. #include <linux/module.h>
    ) m. L% f% P/ m& V) N% |* ]
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    ' e$ U$ Y# \; \$ q, Y
30. #include <asm/io.h>
    , y4 z' c, ^* k  v6 x2 {) e6 _
31. #include <linux/moduleparam.h>
    3 I4 s9 ]; m+ ~
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    6 k" p5 j" ?% V" C% r0 L
34. #include <linux/dma-mapping.h>
    , S, u2 v) g; N) R0 o1 o2 I+ E! u) T7 F1 `
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    2 ^" m5 q) g+ ~- L
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    / [+ X. p, T9 _' [/ K
41. #undef EDMA3_DEBUG
    4 j& c5 l; f2 H5 s
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    1 L/ g" f% D& Z( W/ r6 b* B
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    : j' T' i2 E4 S2 l
48. #else
    
49. #define DMA_PRINTK( x... )
    # s( S7 s4 `7 x( s. x, m
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    $ S" f" y5 A3 g8 b: {" P
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    3 O% I' W. U% `6 o+ I% f; |+ w
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    & y- K  i& y: Z6 m6 M
63. 
    1 J" r/ e% p3 f
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. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    0 \; Y  f. _# |( }! g
70. dma_addr_t dmaphysdest1 = 0;
    $ b7 `& N# J0 [: s: H8 L# H
71. dma_addr_t dmaphysdest2 = 0;
    / B; S: c' j& ~$ T" ?. D
72. 
    + a( ]" E/ x0 o
73. char *dmabufsrc1 = NULL;
    # B. ?6 E. f* C9 F& }
74. char *dmabufsrc2 = NULL;
    ' z- V7 U/ P8 p+ P( ^% x8 \. Q
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    5 u' E' m$ L) ]+ r1 F# s% v
77. 
    
78. static int acnt = 512;
    # Y. U9 B( a" M9 N2 `5 A
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    1 P& V( G# q8 B" c9 _: P* v
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    8 R% g/ g4 q) a" ?; }
84. module_param(ccnt, int, S_IRUGO);

复制代码

      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
3 I6 T$ U8 _) `; 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。
! H& B3 I* W1 V) y8 x5 _     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
/ i+ i4 ?0 w( n  A4 o

4 M# `, F; u  ^6 K