author | Florian Pose <fp@igh-essen.com> |
Fri, 16 Dec 2005 15:23:56 +0000 | |
branch | kernel2.6 |
changeset 35 | ed834aa98f89 |
parent 34 | c1e8d61fa395 |
child 39 | 6965c23a6826 |
permissions | -rw-r--r-- |
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/****************************************************************************** |
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parents:
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* |
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* ec_module.c |
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* |
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* EtherCAT-Master-Treiber |
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EtherCAT-Master in eigenes Modul ausgelagert.
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parents:
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* |
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* Autoren: Wilhelm Hagemeister, Florian Pose |
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* |
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* $Id$ |
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* |
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EtherCAT-Master in eigenes Modul ausgelagert.
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* (C) Copyright IgH 2005 |
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* Ingenieurgemeinschaft IgH |
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EtherCAT-Master in eigenes Modul ausgelagert.
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* Heinz-Bäcker Str. 34 |
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EtherCAT-Master in eigenes Modul ausgelagert.
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* D-45356 Essen |
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* Tel.: +49 201/61 99 31 |
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* Fax.: +49 201/61 98 36 |
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* E-mail: sp@igh-essen.com |
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* |
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******************************************************************************/ |
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|
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/init.h> |
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|
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#include "ec_module.h" |
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|
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/******************************************************************************/ |
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#define LITERAL(X) #X |
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#define STRINGIFY(X) LITERAL(X) |
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|
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#define COMPILE_INFO "Revision " STRINGIFY(EC_REV) \ |
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", compiled by " STRINGIFY(EC_USER) \ |
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" at " STRINGIFY(EC_DATE) |
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/******************************************************************************/ |
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|
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int ecat_master_count = 1; |
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EtherCAT_master_t *ecat_masters = NULL; |
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int *ecat_masters_reserved = NULL; |
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|
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/******************************************************************************/ |
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|
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MODULE_AUTHOR ("Wilhelm Hagemeister <hm@igh-essen.com>, Florian Pose <fp@igh-essen.com>"); |
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MODULE_DESCRIPTION ("EtherCAT master driver module"); |
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MODULE_LICENSE("GPL"); |
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MODULE_VERSION(COMPILE_INFO); |
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|
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module_param(ecat_master_count, int, 1); |
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MODULE_PARM_DESC(ecat_master_count, "Number of EtherCAT master to initialize."); |
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|
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module_init(ecat_init_module); |
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module_exit(ecat_cleanup_module); |
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EXPORT_SYMBOL(EtherCAT_register_device); |
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EXPORT_SYMBOL(EtherCAT_unregister_device); |
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EXPORT_SYMBOL(EtherCAT_request); |
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EXPORT_SYMBOL(EtherCAT_release); |
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|
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/******************************************************************************/ |
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|
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/** |
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Init-Funktion des EtherCAT-Master-Treibermodules |
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|
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Initialisiert soviele Master, wie im Parameter ecat_master_count |
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angegeben wurde (Default ist 1). |
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|
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@returns 0, wenn alles o.k., -1 bei ungueltiger Anzahl Master |
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oder zu wenig Speicher. |
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*/ |
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|
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int __init ecat_init_module(void) |
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{ |
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unsigned int i; |
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|
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printk(KERN_ERR "EtherCAT: Master driver, %s\n", COMPILE_INFO); |
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|
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if (ecat_master_count < 1) |
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{ |
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printk(KERN_ERR "EtherCAT: Error - Illegal ecat_master_count: %i\n", |
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ecat_master_count); |
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return -1; |
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83 |
} |
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84 |
|
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printk(KERN_ERR "EtherCAT: Initializing %i EtherCAT master(s)...\n", |
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ecat_master_count); |
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|
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if ((ecat_masters = (EtherCAT_master_t *) kmalloc(sizeof(EtherCAT_master_t) |
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* ecat_master_count, |
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90 |
GFP_KERNEL)) == NULL) |
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{ |
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printk(KERN_ERR "EtherCAT: Could not allocate memory for EtherCAT master(s)!\n"); |
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return -1; |
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94 |
} |
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95 |
|
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if ((ecat_masters_reserved = (int *) kmalloc(sizeof(int) * ecat_master_count, |
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GFP_KERNEL)) == NULL) |
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{ |
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printk(KERN_ERR "EtherCAT: Could not allocate memory for reservation flags!\n"); |
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kfree(ecat_masters); |
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|
101 |
return -1; |
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102 |
} |
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|
103 |
|
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104 |
for (i = 0; i < ecat_master_count; i++) |
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|
105 |
{ |
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|
106 |
EtherCAT_master_init(&ecat_masters[i]); |
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ecat_masters_reserved[i] = 0; |
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|
108 |
} |
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|
109 |
|
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110 |
printk(KERN_ERR "EtherCAT: Master driver initialized.\n"); |
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111 |
|
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112 |
return 0; |
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113 |
} |
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|
114 |
|
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|
115 |
/******************************************************************************/ |
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|
116 |
|
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|
117 |
/** |
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diff
changeset
|
118 |
Cleanup-Funktion des EtherCAT-Master-Treibermoduls |
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changeset
|
119 |
|
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|
120 |
Entfernt alle Master-Instanzen. |
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|
121 |
*/ |
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|
122 |
|
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|
123 |
void __exit ecat_cleanup_module(void) |
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|
124 |
{ |
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EtherCAT-Master in eigenes Modul ausgelagert.
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|
125 |
unsigned int i; |
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|
126 |
|
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|
127 |
printk(KERN_ERR "EtherCAT: Cleaning up master driver...\n"); |
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changeset
|
128 |
|
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parents:
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changeset
|
129 |
if (ecat_masters) |
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|
130 |
{ |
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EtherCAT-Master in eigenes Modul ausgelagert.
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|
131 |
for (i = 0; i < ecat_master_count; i++) |
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|
132 |
{ |
33
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|
133 |
if (ecat_masters_reserved[i]) { |
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|
134 |
printk(KERN_WARNING "EtherCAT: Warning - Master %i is still in use!\n", i); |
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27
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|
135 |
} |
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27
diff
changeset
|
136 |
|
27
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|
137 |
EtherCAT_master_clear(&ecat_masters[i]); |
d75ef6b46e33
EtherCAT-Master in eigenes Modul ausgelagert.
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parents:
diff
changeset
|
138 |
} |
d75ef6b46e33
EtherCAT-Master in eigenes Modul ausgelagert.
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parents:
diff
changeset
|
139 |
|
d75ef6b46e33
EtherCAT-Master in eigenes Modul ausgelagert.
Florian Pose <fp@igh-essen.com>
parents:
diff
changeset
|
140 |
kfree(ecat_masters); |
d75ef6b46e33
EtherCAT-Master in eigenes Modul ausgelagert.
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parents:
diff
changeset
|
141 |
} |
d75ef6b46e33
EtherCAT-Master in eigenes Modul ausgelagert.
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parents:
diff
changeset
|
142 |
|
d75ef6b46e33
EtherCAT-Master in eigenes Modul ausgelagert.
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parents:
diff
changeset
|
143 |
printk(KERN_ERR "EtherCAT: Master driver cleaned up.\n"); |
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EtherCAT-Master in eigenes Modul ausgelagert.
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parents:
diff
changeset
|
144 |
} |
d75ef6b46e33
EtherCAT-Master in eigenes Modul ausgelagert.
Florian Pose <fp@igh-essen.com>
parents:
diff
changeset
|
145 |
|
33
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27
diff
changeset
|
146 |
/***************************************************************/ |
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27
diff
changeset
|
147 |
|
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27
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changeset
|
148 |
/** |
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changeset
|
149 |
Setzt das EtherCAT-Geraet, auf dem der Master arbeitet. |
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parents:
27
diff
changeset
|
150 |
|
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Florian Pose <fp@igh-essen.com>
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27
diff
changeset
|
151 |
Registriert das Geraet beim Master, der es daraufhin oeffnet. |
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Master-Reservierung und Use-Count f?r NIC-Treiber.
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changeset
|
152 |
|
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27
diff
changeset
|
153 |
@param master Der EtherCAT-Master |
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27
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changeset
|
154 |
@param device Das EtherCAT-Geraet |
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Master-Reservierung und Use-Count f?r NIC-Treiber.
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27
diff
changeset
|
155 |
@return 0, wenn alles o.k., |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
156 |
< 0, wenn bereits ein Geraet registriert |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
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27
diff
changeset
|
157 |
oder das Geraet nicht geoeffnet werden konnte. |
f4171b8aadf8
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parents:
27
diff
changeset
|
158 |
*/ |
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Master-Reservierung und Use-Count f?r NIC-Treiber.
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parents:
27
diff
changeset
|
159 |
|
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parents:
27
diff
changeset
|
160 |
int EtherCAT_register_device(int index, EtherCAT_device_t *device) |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
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27
diff
changeset
|
161 |
{ |
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Master-Reservierung und Use-Count f?r NIC-Treiber.
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27
diff
changeset
|
162 |
if (index < 0 || index >= ecat_master_count) |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
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parents:
27
diff
changeset
|
163 |
{ |
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Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
164 |
printk(KERN_ERR "EtherCAT: Master %i does not exist!\n", index); |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
165 |
return -1; |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
166 |
} |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
167 |
|
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
168 |
return EtherCAT_master_open(&ecat_masters[index], device); |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
169 |
} |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
170 |
|
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
171 |
/***************************************************************/ |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
172 |
|
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
173 |
/** |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
174 |
Loescht das EtherCAT-Geraet, auf dem der Master arbeitet. |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
175 |
|
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
176 |
@param master Der EtherCAT-Master |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
177 |
@param device Das EtherCAT-Geraet |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
178 |
*/ |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
179 |
|
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
180 |
void EtherCAT_unregister_device(int index, EtherCAT_device_t *device) |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
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parents:
27
diff
changeset
|
181 |
{ |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
182 |
if (index < 0 || index >= ecat_master_count) |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
183 |
{ |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
184 |
printk(KERN_WARNING "EtherCAT: Master %i does not exist!\n", index); |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
185 |
return; |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
186 |
} |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
187 |
|
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
188 |
EtherCAT_master_close(&ecat_masters[index], device); |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
189 |
} |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
190 |
|
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
191 |
/******************************************************************************/ |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
192 |
|
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
193 |
/** |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
194 |
Reserviert einen bestimmten EtherCAT-Master und das zugehörige Gerät. |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
195 |
|
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
196 |
Gibt einen Zeiger auf den reservierten EtherCAT-Master zurueck. |
27
d75ef6b46e33
EtherCAT-Master in eigenes Modul ausgelagert.
Florian Pose <fp@igh-essen.com>
parents:
diff
changeset
|
197 |
|
d75ef6b46e33
EtherCAT-Master in eigenes Modul ausgelagert.
Florian Pose <fp@igh-essen.com>
parents:
diff
changeset
|
198 |
@param index Index des gewuenschten Masters |
d75ef6b46e33
EtherCAT-Master in eigenes Modul ausgelagert.
Florian Pose <fp@igh-essen.com>
parents:
diff
changeset
|
199 |
@returns Zeiger auf EtherCAT-Master oder NULL, wenn Parameter ungueltig. |
d75ef6b46e33
EtherCAT-Master in eigenes Modul ausgelagert.
Florian Pose <fp@igh-essen.com>
parents:
diff
changeset
|
200 |
*/ |
d75ef6b46e33
EtherCAT-Master in eigenes Modul ausgelagert.
Florian Pose <fp@igh-essen.com>
parents:
diff
changeset
|
201 |
|
33
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
202 |
EtherCAT_master_t *EtherCAT_request(int index) |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
203 |
{ |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
204 |
if (index < 0 || index >= ecat_master_count) { |
27
d75ef6b46e33
EtherCAT-Master in eigenes Modul ausgelagert.
Florian Pose <fp@igh-essen.com>
parents:
diff
changeset
|
205 |
printk(KERN_ERR "EtherCAT: Master %i does not exist!\n", index); |
d75ef6b46e33
EtherCAT-Master in eigenes Modul ausgelagert.
Florian Pose <fp@igh-essen.com>
parents:
diff
changeset
|
206 |
return NULL; |
d75ef6b46e33
EtherCAT-Master in eigenes Modul ausgelagert.
Florian Pose <fp@igh-essen.com>
parents:
diff
changeset
|
207 |
} |
d75ef6b46e33
EtherCAT-Master in eigenes Modul ausgelagert.
Florian Pose <fp@igh-essen.com>
parents:
diff
changeset
|
208 |
|
33
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
209 |
if (ecat_masters_reserved[index]) { |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
210 |
printk(KERN_ERR "EtherCAT: Master %i already in use!\n", index); |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
211 |
return NULL; |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
212 |
} |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
213 |
|
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
214 |
if (!ecat_masters[index].dev) { |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
215 |
printk(KERN_ERR "EtherCAT: Master %i has no device assigned yet!\n", index); |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
216 |
return NULL; |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
217 |
} |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
218 |
|
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
219 |
if (!ecat_masters[index].dev->module) { |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
220 |
printk(KERN_ERR "EtherCAT: Master %i device module is not set!\n", index); |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
221 |
return NULL; |
f4171b8aadf8
Master-Reservierung und Use-Count f?r NIC-Treiber.
Florian Pose <fp@igh-essen.com>
parents:
27
diff
changeset
|
222 |
} |
f4171b8aadf8
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if (!try_module_get(ecat_masters[index].dev->module)) { |
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printk(KERN_ERR "EtherCAT: Could not reserve device module!\n"); |
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return NULL; |
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} |
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ecat_masters_reserved[index] = 1; |
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printk(KERN_INFO "EtherCAT: Reserved master %i.\n", index); |
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return &ecat_masters[index]; |
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} |
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|
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/******************************************************************************/ |
33
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/** |
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Gibt einen zuvor reservierten EtherCAT-Master wieder frei. |
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@param master Zeiger auf den freizugebenden EtherCAT-Master. |
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*/ |
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void EtherCAT_release(EtherCAT_master_t *master) |
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{ |
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unsigned int i; |
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for (i = 0; i < ecat_master_count; i++) |
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{ |
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if (&ecat_masters[i] == master) |
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{ |
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if (!ecat_masters[i].dev) { |
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printk(KERN_WARNING "EtherCAT: Could not release device" |
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"module because of no device!\n"); |
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return; |
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} |
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|
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module_put(ecat_masters[i].dev->module); |
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ecat_masters_reserved[i] = 0; |
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printk(KERN_INFO "EtherCAT: Released master %i.\n", i); |
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|
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return; |
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} |
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} |
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266 |
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printk(KERN_WARNING "EtherCAT: Master %X was never reserved!\n", |
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(unsigned int) master); |
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} |
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|
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271 |
/******************************************************************************/ |