author | Edouard Tisserant |
Wed, 13 Jun 2012 19:08:58 +0200 | |
changeset 739 | 4faa0bb578e0 |
parent 631 | 08b6b903f84a |
permissions | -rw-r--r-- |
391
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Accepted Vladimir Chren linux kernelspace port patch.
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1 |
/* |
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This file is part of CanFestival, a library implementing CanOpen Stack. |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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3 |
|
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4 |
Copyright (C): Edouard TISSERANT and Francis DUPIN |
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5 |
|
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See COPYING file for copyrights details. |
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7 |
|
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Accepted Vladimir Chren linux kernelspace port patch.
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This library is free software; you can redistribute it and/or |
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9 |
modify it under the terms of the GNU Lesser General Public |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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10 |
License as published by the Free Software Foundation; either |
7802a7d5584f
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11 |
version 2.1 of the License, or (at your option) any later version. |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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12 |
|
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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This library is distributed in the hope that it will be useful, |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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Lesser General Public License for more details. |
7802a7d5584f
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|
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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You should have received a copy of the GNU Lesser General Public |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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19 |
License along with this library; if not, write to the Free Software |
7802a7d5584f
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20 |
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
7802a7d5584f
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*/ |
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|
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/* |
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Virtual CAN driver. |
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|
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Modification of drivers/can_virtual/can_virtual.c: |
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27 |
Rewritten from user-space library to kernel-space module with exported symbols |
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*/ |
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#include <linux/module.h> |
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#include <linux/err.h> |
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#include <linux/kfifo.h> |
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#include <linux/spinlock.h> |
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#include <linux/sched.h> |
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#include <linux/wait.h> |
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#include <linux/string.h> |
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|
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#define NEED_PRINT_MESSAGE |
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#include "can_driver.h" |
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#include "def.h" |
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MODULE_LICENSE("GPL"); |
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#define MAX_NB_CAN_PIPES 16 |
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typedef struct { |
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char used; |
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48 |
struct kfifo *pipe; |
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spinlock_t lock; |
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wait_queue_head_t w_queue; |
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51 |
} CANPipe; |
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CANPipe canpipes[MAX_NB_CAN_PIPES] = {{0,},{0,},{0,},{0,},{0,},{0,},{0,},{0,},{0,},{0,},{0,},{0,},{0,},{0,},{0,},{0,},}; |
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Accepted Vladimir Chren linux kernelspace port patch.
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|
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Accepted Vladimir Chren linux kernelspace port patch.
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55 |
|
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Accepted Vladimir Chren linux kernelspace port patch.
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/*********functions which permit to communicate with the board****************/ |
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UNS8 canReceive_driver(CAN_HANDLE fd0, Message *m) |
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{ |
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long ret = wait_event_interruptible (((CANPipe*)fd0)->w_queue, |
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kfifo_len (((CANPipe*)fd0)->pipe) >= sizeof(Message)); |
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Accepted Vladimir Chren linux kernelspace port patch.
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61 |
|
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Accepted Vladimir Chren linux kernelspace port patch.
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// interrupted by signal |
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if (ret == -ERESTARTSYS) |
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Accepted Vladimir Chren linux kernelspace port patch.
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64 |
return 2; |
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Accepted Vladimir Chren linux kernelspace port patch.
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65 |
|
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Accepted Vladimir Chren linux kernelspace port patch.
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if (kfifo_get (((CANPipe*)fd0)->pipe, (unsigned char *)m, sizeof(Message)) != sizeof(Message)) |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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{ |
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Accepted Vladimir Chren linux kernelspace port patch.
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printk(KERN_NOTICE "can_virtual: error receiving data from kernel fifo.\n"); |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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69 |
return 1; |
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Accepted Vladimir Chren linux kernelspace port patch.
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70 |
} |
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Accepted Vladimir Chren linux kernelspace port patch.
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71 |
|
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Accepted Vladimir Chren linux kernelspace port patch.
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return 0; |
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Accepted Vladimir Chren linux kernelspace port patch.
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73 |
} |
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Accepted Vladimir Chren linux kernelspace port patch.
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|
631 | 75 |
UNS8 canSend_driver(CAN_HANDLE fd0, Message const *m) |
391
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{ |
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Accepted Vladimir Chren linux kernelspace port patch.
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int i; |
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78 |
|
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Accepted Vladimir Chren linux kernelspace port patch.
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printk(KERN_INFO "%x->[ ", (CANPipe*)fd0 - &canpipes[0]); |
7802a7d5584f
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80 |
for(i=0; i < MAX_NB_CAN_PIPES; i++) |
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Accepted Vladimir Chren linux kernelspace port patch.
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81 |
{ |
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if(canpipes[i].used && &canpipes[i] != (CANPipe*)fd0) |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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83 |
{ |
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Accepted Vladimir Chren linux kernelspace port patch.
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84 |
printk("%x ",i); |
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Accepted Vladimir Chren linux kernelspace port patch.
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85 |
} |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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86 |
} |
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Accepted Vladimir Chren linux kernelspace port patch.
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87 |
printk(" ]"); |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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88 |
print_message(m); |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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89 |
|
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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90 |
// send to all readers, except myself |
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Accepted Vladimir Chren linux kernelspace port patch.
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91 |
for(i=0; i < MAX_NB_CAN_PIPES; i++) |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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92 |
{ |
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Accepted Vladimir Chren linux kernelspace port patch.
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93 |
if(canpipes[i].used && &canpipes[i] != (CANPipe*)fd0) |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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94 |
{ |
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Accepted Vladimir Chren linux kernelspace port patch.
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95 |
unsigned int len; |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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96 |
len = kfifo_put (canpipes[i].pipe, (unsigned char *)m, sizeof(Message)); |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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97 |
if (len != sizeof(Message)) { |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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98 |
printk(KERN_NOTICE "can_virtual: error sending data to kernel fifo.\n"); |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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99 |
return 1; |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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100 |
} |
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Accepted Vladimir Chren linux kernelspace port patch.
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101 |
|
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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102 |
// wake up canReceive_driver() |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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103 |
wake_up_interruptible (&canpipes[i].w_queue); |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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104 |
} |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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|
105 |
} |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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106 |
|
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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107 |
return 0; |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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108 |
} |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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109 |
|
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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110 |
int TranslateBaudRate(char* optarg){ |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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111 |
if(!strcmp( optarg, "1M")) return (int)1000; |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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112 |
if(!strcmp( optarg, "500K")) return (int)500; |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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113 |
if(!strcmp( optarg, "250K")) return (int)250; |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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114 |
if(!strcmp( optarg, "125K")) return (int)125; |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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115 |
if(!strcmp( optarg, "100K")) return (int)100; |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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116 |
if(!strcmp( optarg, "50K")) return (int)50; |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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117 |
if(!strcmp( optarg, "20K")) return (int)20; |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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118 |
if(!strcmp( optarg, "10K")) return (int)10; |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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119 |
if(!strcmp( optarg, "5K")) return (int)5; |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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120 |
if(!strcmp( optarg, "none")) return 0; |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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121 |
return 0x0000; |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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|
122 |
} |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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123 |
|
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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124 |
UNS8 canChangeBaudRate_driver( CAN_HANDLE fd0, char* baud) |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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|
125 |
{ |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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126 |
printk("%x-> changing to baud rate %s[%d]\n", (CANPipe*)fd0 - &canpipes[0],baud,TranslateBaudRate(baud)); |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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|
127 |
return 0; |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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|
128 |
} |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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|
129 |
|
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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130 |
|
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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131 |
CAN_HANDLE canOpen_driver(s_BOARD *board) |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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132 |
{ |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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133 |
int i; |
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Accepted Vladimir Chren linux kernelspace port patch.
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134 |
for(i=0; i < MAX_NB_CAN_PIPES; i++) |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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135 |
{ |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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|
136 |
if(!canpipes[i].used) |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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|
137 |
break; |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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|
138 |
} |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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|
139 |
|
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
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|
140 |
// initialize CANPipe structure |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
etisserant
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|
141 |
init_waitqueue_head(&canpipes[i].w_queue); |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
etisserant
parents:
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|
142 |
canpipes[i].lock = SPIN_LOCK_UNLOCKED; |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
etisserant
parents:
diff
changeset
|
143 |
canpipes[i].pipe = kfifo_alloc (10*sizeof(Message), GFP_KERNEL, &canpipes[i].lock); |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
etisserant
parents:
diff
changeset
|
144 |
|
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
etisserant
parents:
diff
changeset
|
145 |
if (i==MAX_NB_CAN_PIPES || (PTR_ERR(canpipes[i].pipe) == -ENOMEM)) |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
etisserant
parents:
diff
changeset
|
146 |
{ |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
etisserant
parents:
diff
changeset
|
147 |
printk (KERN_NOTICE "can_virtual: error initializing driver.\n"); |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
etisserant
parents:
diff
changeset
|
148 |
return (CAN_HANDLE)NULL; |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
etisserant
parents:
diff
changeset
|
149 |
} |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
etisserant
parents:
diff
changeset
|
150 |
|
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
etisserant
parents:
diff
changeset
|
151 |
canpipes[i].used = 1; |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
etisserant
parents:
diff
changeset
|
152 |
return (CAN_HANDLE) &canpipes[i]; |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
etisserant
parents:
diff
changeset
|
153 |
} |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
etisserant
parents:
diff
changeset
|
154 |
|
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
etisserant
parents:
diff
changeset
|
155 |
int canClose_driver(CAN_HANDLE fd0) |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
etisserant
parents:
diff
changeset
|
156 |
{ |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
etisserant
parents:
diff
changeset
|
157 |
((CANPipe*)fd0)->used = 0; |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
etisserant
parents:
diff
changeset
|
158 |
kfifo_free (((CANPipe*)fd0)->pipe); |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
etisserant
parents:
diff
changeset
|
159 |
|
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
etisserant
parents:
diff
changeset
|
160 |
return 0; |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
etisserant
parents:
diff
changeset
|
161 |
} |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
etisserant
parents:
diff
changeset
|
162 |
|
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
etisserant
parents:
diff
changeset
|
163 |
EXPORT_SYMBOL(canOpen_driver); |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
etisserant
parents:
diff
changeset
|
164 |
EXPORT_SYMBOL(canClose_driver); |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
etisserant
parents:
diff
changeset
|
165 |
EXPORT_SYMBOL(canSend_driver); |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
etisserant
parents:
diff
changeset
|
166 |
EXPORT_SYMBOL(canReceive_driver); |
7802a7d5584f
Accepted Vladimir Chren linux kernelspace port patch.
etisserant
parents:
diff
changeset
|
167 |
EXPORT_SYMBOL(canChangeBaudRate_driver); |