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标题: OMAPL138如何在Linux下使用EDMA3驱动 [打印本页]
作者: yyj    时间: 2018-1-30 11:01
标题: OMAPL138如何在Linux下使用EDMA3驱动
本帖最后由 yyj 于 2018-1-30 11:01 编辑 & Y- e, l# g2 o! f/ G( k1 m
  1. [code]EDMA sample test application
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  2. /*1 P+ V5 _) \5 n  o7 v1 S: x; m" ^8 \
  3. * edma_test.c
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  4. *: r: `5 t3 G: U
  5. * brief  EDMA3 Test Application
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  6. *
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  7. *   This file contains EDMA3 Test code.
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  8. *
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  9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE  K0 d& X+ e% @) q, i
  10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
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  11. *         TO CHANGE.3 K( f1 |. p  e* |2 ~1 D
  12. *1 T" ?9 m5 N1 p( l4 I& R$ C
  13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
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  14. *& S" U/ K1 ?' m: ^) s
  15. * This program is free software; you can redistribute it and/or
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  16. * modify it under the terms of the GNU General Public License as
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  17. * published by the Free Software Foundation version 2.
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  18. *1 h1 l4 e/ ?' a* S2 e' Z* U
  19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
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  20. * kind, whether express or implied; without even the implied warranty
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  21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the5 y0 K& n& S& G2 J
  22. * GNU General Public License for more details.
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  23. */+ D& o" _$ N0 A% Q
  24. ! C3 j2 `  O" B6 g
  25. #include <linux/module.h>0 F: A5 d' o; t# A! M
  26. #include <linux/init.h>: T) \! w# e! i- p( W: R
  27. #include <linux/errno.h>
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  28. #include <linux/types.h>
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  29. #include <linux/interrupt.h>
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  30. #include <asm/io.h>
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  31. #include <linux/moduleparam.h>- t% ?, \& }; P& k
  32. #include <linux/sysctl.h>! W7 }7 {$ g/ `; B, v6 E$ e
  33. #include <linux/mm.h>
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  34. #include <linux/dma-mapping.h>0 A6 b3 ~1 d2 R0 J# o- F
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  36. #include <mach/memory.h>
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  37. #include <mach/hardware.h>
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  38. #include <mach/irqs.h>/ q( L1 T) Y. a8 ^& G
  39. #include <asm/hardware/edma.h>
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  41. #undef EDMA3_DEBUG' J% J8 S( p/ n& i/ g$ T
  42. /*#define EDMA3_DEBUG*/
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  44. #ifdef EDMA3_DEBUG
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  45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
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  46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)! G9 S/ ^% T  @' [
  47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)/ m+ A7 d" O# V
  48. #else
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  49. #define DMA_PRINTK( x... )# e: h% t9 j" I! f! l. m6 p5 k' j
  50. #define DMA_FN_IN+ d& K5 ]- ^2 `- K% D7 y
  51. #define DMA_FN_OUT
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  52. #endif$ R9 Y* m3 I8 a# r. g: C" h

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  54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
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  55. #define STATIC_SHIFT                32 D7 ~: o1 F& Z7 o
  56. #define TCINTEN_SHIFT               205 u* J$ M' F6 U2 |( g9 y* B, l5 b
  57. #define ITCINTEN_SHIFT              214 H+ x6 R0 f  X2 G1 M! D
  58. #define TCCHEN_SHIFT                227 t( E$ y6 |$ H* H, B/ w
  59. #define ITCCHEN_SHIFT               23  q5 D# [# ^* f+ h  S! Y8 t( {

  60.   \; D* ^: f# ~( ~9 `; v
  61. static volatile int irqraised1 = 0;
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  62. static volatile int irqraised2 = 0;4 M/ _* @; i* H9 G; N& n. k& G

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  64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
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  65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
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  66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);( L5 f& U  ~; @7 k( o- ~

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  68. dma_addr_t dmaphyssrc1 = 0;( e' h5 I8 @/ m; K8 l( G" U+ n# q) _
  69. dma_addr_t dmaphyssrc2 = 0;
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  70. dma_addr_t dmaphysdest1 = 0;
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  71. dma_addr_t dmaphysdest2 = 0;
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  72. 7 b( \; Y( K+ C* Q$ `1 l. p2 \4 R
  73. char *dmabufsrc1 = NULL;+ z# A, q! J( W3 b1 T: X) N4 y5 H' b
  74. char *dmabufsrc2 = NULL;& f3 J/ p! Z2 {" }  `
  75. char *dmabufdest1 = NULL;8 y* ^" M" B3 @0 @4 X$ h: w
  76. char *dmabufdest2 = NULL;  V  V( y  ?' K3 X* C" l% A8 _
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  78. static int acnt = 512;: U+ e: D- w& f+ `/ V: T% Z, `
  79. static int bcnt = 8;
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  80. static int ccnt = 8;2 V# b# T5 K- @

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  82. module_param(acnt, int, S_IRUGO);
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  83. module_param(bcnt, int, S_IRUGO);# w0 A. Z) i  z6 o; G+ A1 r
  84. module_param(ccnt, int, S_IRUGO);
复制代码
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1 m0 J1 b: {, V- O1 E% B      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
+ c4 X  q$ C" H5 o* g2 h  e3 g. L/ karm-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 c& R/ Q; y- |0 `$ I8 M' q& F
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。' i6 s. j: a9 [

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