OMAPL138如何在Linux下使用EDMA3驱动

yyj

. ]" G5 }. o0 ?- O

1. [code]EDMA sample test application
   
2. /*
   ) }, _9 m2 m2 q/ G6 E! k1 q
3. * edma_test.c
   ! B* @9 v1 x7 T, b2 G+ Q
4. *
   
5. * brief  EDMA3 Test Application
     Z8 S" P0 W" J. |5 `
6. *
   
7. *   This file contains EDMA3 Test code.
   
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
    
11. *         TO CHANGE.
    + H& \  V* w1 I
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    . t/ F' k$ U( k( m; j
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
    ! i0 R+ K) |1 {8 G
17. * published by the Free Software Foundation version 2.
    
18. *
    / B' M  h2 u) X: w& X4 q+ I8 ]1 s
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    * G1 F6 ]( N# j+ j- i! ]$ A
20. * kind, whether express or implied; without even the implied warranty
    ! s1 y+ x  K' p( {4 S5 t2 p
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    
24. 
    8 v* q" G9 Y. q7 {! B4 c% y
25. #include <linux/module.h>
    7 B3 s9 P) B, B0 ^+ p1 n
26. #include <linux/init.h>
    + j; u8 v( H/ z# e6 B
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    ; d8 ~* P4 S2 Q
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
      }" r( k+ g  @" b" }. t
36. #include <mach/memory.h>
    . @: q7 L! a  O* k' }, t' Z# H; k
37. #include <mach/hardware.h>
    + j+ M/ L# ]$ ~' p( _
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
      B/ [1 }  v9 l
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    0 ^, O/ L* l- E6 }
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    ! _8 }: D+ H/ m# {" _7 b2 d9 B, y
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    ' x* G1 F, E8 v
48. #else
    # I, {; w* L3 n
49. #define DMA_PRINTK( x... )
    5 [+ _$ |, l: q: }! L! S
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    7 U: K/ J& k7 K6 |$ [
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    $ h3 e! B- [) K# \7 O
58. #define TCCHEN_SHIFT                22
    . j+ x% P+ c/ F" A
59. #define ITCCHEN_SHIFT               23
    3 @, c4 }' m5 h5 @4 V/ w. o
60. 
    $ d8 r( n. f5 |6 M6 B2 h! f' M0 ~3 D
61. static volatile int irqraised1 = 0;
    8 t* m% B5 D" {
62. static volatile int irqraised2 = 0;
    
63. 
    & |! }! ^2 `; q& T4 Y5 d& o
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;
    8 w# v- t# R5 |) e' `
70. dma_addr_t dmaphysdest1 = 0;
    , d. \' _" T% M3 N" P; y
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    2 B6 k7 `( P9 T" k1 i
74. char *dmabufsrc2 = NULL;
    " W/ }) \5 I1 w8 a( p
75. char *dmabufdest1 = NULL;
    ! [- E) l+ f& l5 m* v
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    - W2 V1 n: r2 i( J6 G: T! C+ y
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    8 o- L9 V, Z' K3 T
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    - ]  @# r, P9 v
84. module_param(ccnt, int, S_IRUGO);

复制代码

- F/ M4 e/ l4 W: C
      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。
; F5 U8 H% B! @% R  z, A5 L     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
1 i. X0 K( q8 U: q) ^* ?

% n1 A/ b# `+ S, W% E