OMAPL138如何在Linux下使用EDMA3驱动

yyj

9 v* `& t& J* j

1. [code]EDMA sample test application
   
2. /*
   $ j- d5 r0 Z/ s7 T- E, f# o
3. * edma_test.c
   : J# l! W1 y7 T9 R7 I+ r
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   ; j0 i( v1 v; {# B5 ?$ ?2 p
7. *   This file contains EDMA3 Test code.
   
8. *
   ( r) w2 g; a6 s* H
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
    6 E. U* d: K4 [! X- S
11. *         TO CHANGE.
    ) K) C6 g; g" O: d' d/ e( E
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    8 v' u. F! D  M# s% l7 N
14. *
    
15. * This program is free software; you can redistribute it and/or
    * w* v3 l. \* ?, x/ m1 b
16. * modify it under the terms of the GNU General Public License as
    . ^# o, m7 G) y# {8 ]9 k+ |/ U
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
    2 z9 m0 r( R7 Q' w8 b  a
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    
24. 
    0 u, ^6 h2 h0 b
25. #include <linux/module.h>
    . m3 L# y  ]; r
26. #include <linux/init.h>
    . C; B! P  y! V4 J# p
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    ) K. K& W4 c& V. _& N
31. #include <linux/moduleparam.h>
    # V) N2 M6 T. h
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    . r# @- d+ J1 ^, N; u
34. #include <linux/dma-mapping.h>
    
35. 
    ; H/ W8 p: O, U: c4 a$ R9 `
36. #include <mach/memory.h>
    ! ^$ D! b9 A! P1 p
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    3 S7 v/ _+ X- |5 a9 B! d) v+ R% c) U
41. #undef EDMA3_DEBUG
    7 S& Q  T; \% \; }& H4 ~
42. /*#define EDMA3_DEBUG*/
    : I9 E/ K$ F+ K) v
43. 
    
44. #ifdef EDMA3_DEBUG
    3 t/ v9 I! f3 {" m
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    ( t- p  c$ b. K3 a7 y/ A/ l# h' J# {1 b
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    7 U. q0 h$ W$ {% m5 ?* X- A
50. #define DMA_FN_IN
    4 u. _' h+ `$ e" U3 O
51. #define DMA_FN_OUT
    4 w/ g7 p8 g( k
52. #endif
    8 J+ J- h: R7 x' E
53. 
    / q6 D1 x# ^4 V* e$ \7 [: U
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    9 a1 H$ Y6 W1 {4 q
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    # L( K' `0 f5 ]. j4 b* T3 i' R4 E/ R
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    9 y- D# C8 x% L/ ?* `& u
63. 
    3 @6 i+ p% c6 w8 c0 F2 ]
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);
    7 N/ c# W! l3 G# i% D! ^
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    * k' M: }, C' c% M$ x+ R' i9 l# ]1 x
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    5 t& U# P( ~7 ^3 [0 f. u8 d
70. dma_addr_t dmaphysdest1 = 0;
    6 k+ g$ B4 j/ ~7 C
71. dma_addr_t dmaphysdest2 = 0;
    " @( d* S3 K* l! u: z: s3 l: d. q' \- ]
72. 
    
73. char *dmabufsrc1 = NULL;
    - T  h" O' u- s/ B  n0 ^' C
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    : Y2 P+ q* x" `' `& x+ i, L
76. char *dmabufdest2 = NULL;
    # w2 k9 g- }% O+ i
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    * P) F  ?# v/ J) ?2 H) T
81. 
    8 D6 e1 ?0 O- @7 R
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

8 G; r; T2 J6 n9 }$ d
# x: x, s2 j3 ]: 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
  N# l5 k; a6 s* S- Darm-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 T2 N1 F; F; c3 i& C, X     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
$ s6 @( E2 M2 B& c4 V
2 U# N2 l0 e1 m