OMAPL138如何在Linux下使用EDMA3驱动

yyj

' G0 }5 ~2 z0 B% \- r7 T; d

1. [code]EDMA sample test application
   ( k' a2 q/ M9 n* e& t
2. /*
   
3. * edma_test.c
   
4. *
   8 u  I! g, [0 `3 ?) e% B# s* _$ i
5. * brief  EDMA3 Test Application
   " G- B9 B* s8 Y: D
6. *
   
7. *   This file contains EDMA3 Test code.
     M% R1 e5 D- s5 f$ {. u
8. *
   8 q( E+ N+ u( V. c% U5 H
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   1 b, Y- y9 f" R7 O
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    # P* ~4 a! G5 D1 ]" y
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ; f- E, x, R- M. P
14. *
    % w9 x4 p" k: e2 H8 C3 x
15. * This program is free software; you can redistribute it and/or
    - f$ m3 B+ ?0 v) T
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    6 G* A" J, P& c+ @
18. *
    . }, D; n! P" N  m% G$ ?" \, _
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    - g/ r0 ~- v' V2 u
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    % h  ^! a0 k' o
22. * GNU General Public License for more details.
    8 ]+ ^+ N+ `8 U- p" c
23. */
      p" J  H1 ^6 S5 y2 s5 E3 Z
24. 
    8 N" |' l+ o3 Y5 j( B( o5 {' C* P
25. #include <linux/module.h>
    ' p% o. {3 L9 t% ]' j% W$ d. Q, ^
26. #include <linux/init.h>
    : k6 z  u  [% L& s
27. #include <linux/errno.h>
    4 A8 t  \- {1 l. Z5 l) X6 U
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    % I9 P! W3 c4 P- j5 k2 O
30. #include <asm/io.h>
    & k) n, G3 n  E9 L1 ^
31. #include <linux/moduleparam.h>
    ( G5 t: ^& m! i3 C3 e
32. #include <linux/sysctl.h>
    & M0 D. n6 q' y# I! H  a% t
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    0 n+ ~+ D9 [: b6 I, [/ l6 C
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    % b" d! z9 v, k
40. 
    3 o4 V6 e) g6 t) B, n
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    - N# h! F; B( D4 t0 h0 X8 R& }
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    5 v% z% W4 R& |$ T, O( J* p! }
48. #else
    0 m; e4 g* a- `( y' {" R7 m) X. P, H
49. #define DMA_PRINTK( x... )
    ( g" G" M4 c9 c2 X
50. #define DMA_FN_IN
    $ W9 A0 ?" {6 L9 F) h, Q
51. #define DMA_FN_OUT
    
52. #endif
    : ~3 M  M* k3 z% K9 v& e# f. j' c( |
53. 
    : G% z* N+ _/ I' ]+ v% n& R+ V
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    ; ?" H8 {" R3 o) e1 `0 h- r
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 V( s9 d* ]* _( i4 d! ~
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
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);
    + S  ?- q( R$ F1 z8 P
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    $ z6 i0 O( P" o# ~1 B: d5 J# S5 l
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    : b/ E. ^2 m5 Z( i: ]) i. f3 a
71. dma_addr_t dmaphysdest2 = 0;
      P9 ~7 b* X' f$ W9 r4 q
72. 
    2 n( F8 |! i, d$ Z
73. char *dmabufsrc1 = NULL;
    & _/ l" J4 {# R9 m& D) D$ E
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    / P1 y& s# }- v# M1 q
76. char *dmabufdest2 = NULL;
    8 |( Q5 T  k1 E
77. 
    
78. static int acnt = 512;
    / W5 z% V2 N! \8 Q) `( y$ t9 e5 Z3 A
79. static int bcnt = 8;
    % Z7 `. C! F$ a, I6 m" F+ P. t: G/ p
80. static int ccnt = 8;
    " a* L4 s7 T4 j8 I4 e( J
81. 
    # x0 @1 X# s2 r
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    7 D9 h7 ]1 a6 S
84. module_param(ccnt, int, S_IRUGO);

复制代码

0 a1 Y) Z9 D! y$ K) L
      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
( w* l5 I" @6 }, z; Sarm-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 ]( ~8 U. P* Q. l  o. H* n     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
) v, m7 y$ ]% g& t: ?! F2 |
6 [5 X/ l5 i( j. s
  \8 X7 ^9 v$ h8 y) {