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Linux/drivers/isdn/hisax/elsa_cs.c

  1 /*======================================================================
  2 
  3   An elsa_cs PCMCIA client driver
  4 
  5   This driver is for the Elsa PCM ISDN Cards, i.e. the MicroLink
  6 
  7 
  8   The contents of this file are subject to the Mozilla Public
  9   License Version 1.1 (the "License"); you may not use this file
 10   except in compliance with the License. You may obtain a copy of
 11   the License at http://www.mozilla.org/MPL/
 12 
 13   Software distributed under the License is distributed on an "AS
 14   IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 15   implied. See the License for the specific language governing
 16   rights and limitations under the License.
 17 
 18   The initial developer of the original code is David A. Hinds
 19   <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
 20   are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
 21 
 22   Modifications from dummy_cs.c are Copyright (C) 1999-2001 Klaus
 23   Lichtenwalder <Lichtenwalder@ACM.org>. All Rights Reserved.
 24 
 25   Alternatively, the contents of this file may be used under the
 26   terms of the GNU General Public License version 2 (the "GPL"), in
 27   which case the provisions of the GPL are applicable instead of the
 28   above.  If you wish to allow the use of your version of this file
 29   only under the terms of the GPL and not to allow others to use
 30   your version of this file under the MPL, indicate your decision
 31   by deleting the provisions above and replace them with the notice
 32   and other provisions required by the GPL.  If you do not delete
 33   the provisions above, a recipient may use your version of this
 34   file under either the MPL or the GPL.
 35 
 36   ======================================================================*/
 37 
 38 #include <linux/module.h>
 39 #include <linux/kernel.h>
 40 #include <linux/init.h>
 41 #include <linux/ptrace.h>
 42 #include <linux/slab.h>
 43 #include <linux/string.h>
 44 #include <linux/timer.h>
 45 #include <linux/ioport.h>
 46 #include <asm/io.h>
 47 
 48 #include <pcmcia/cistpl.h>
 49 #include <pcmcia/cisreg.h>
 50 #include <pcmcia/ds.h>
 51 #include "hisax_cfg.h"
 52 
 53 MODULE_DESCRIPTION("ISDN4Linux: PCMCIA client driver for Elsa PCM cards");
 54 MODULE_AUTHOR("Klaus Lichtenwalder");
 55 MODULE_LICENSE("Dual MPL/GPL");
 56 
 57 
 58 /*====================================================================*/
 59 
 60 /* Parameters that can be set with 'insmod' */
 61 
 62 static int protocol = 2;        /* EURO-ISDN Default */
 63 module_param(protocol, int, 0);
 64 
 65 static int elsa_cs_config(struct pcmcia_device *link);
 66 static void elsa_cs_release(struct pcmcia_device *link);
 67 static void elsa_cs_detach(struct pcmcia_device *p_dev);
 68 
 69 typedef struct local_info_t {
 70         struct pcmcia_device    *p_dev;
 71         int                 busy;
 72         int                     cardnr;
 73 } local_info_t;
 74 
 75 static int elsa_cs_probe(struct pcmcia_device *link)
 76 {
 77         local_info_t *local;
 78 
 79         dev_dbg(&link->dev, "elsa_cs_attach()\n");
 80 
 81         /* Allocate space for private device-specific data */
 82         local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
 83         if (!local) return -ENOMEM;
 84 
 85         local->p_dev = link;
 86         link->priv = local;
 87 
 88         local->cardnr = -1;
 89 
 90         return elsa_cs_config(link);
 91 } /* elsa_cs_attach */
 92 
 93 static void elsa_cs_detach(struct pcmcia_device *link)
 94 {
 95         local_info_t *info = link->priv;
 96 
 97         dev_dbg(&link->dev, "elsa_cs_detach(0x%p)\n", link);
 98 
 99         info->busy = 1;
100         elsa_cs_release(link);
101 
102         kfree(info);
103 } /* elsa_cs_detach */
104 
105 static int elsa_cs_configcheck(struct pcmcia_device *p_dev, void *priv_data)
106 {
107         int j;
108 
109         p_dev->io_lines = 3;
110         p_dev->resource[0]->end = 8;
111         p_dev->resource[0]->flags &= IO_DATA_PATH_WIDTH;
112         p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
113 
114         if ((p_dev->resource[0]->end) && p_dev->resource[0]->start) {
115                 printk(KERN_INFO "(elsa_cs: looks like the 96 model)\n");
116                 if (!pcmcia_request_io(p_dev))
117                         return 0;
118         } else {
119                 printk(KERN_INFO "(elsa_cs: looks like the 97 model)\n");
120                 for (j = 0x2f0; j > 0x100; j -= 0x10) {
121                         p_dev->resource[0]->start = j;
122                         if (!pcmcia_request_io(p_dev))
123                                 return 0;
124                 }
125         }
126         return -ENODEV;
127 }
128 
129 static int elsa_cs_config(struct pcmcia_device *link)
130 {
131         int i;
132         IsdnCard_t icard;
133 
134         dev_dbg(&link->dev, "elsa_config(0x%p)\n", link);
135 
136         link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
137 
138         i = pcmcia_loop_config(link, elsa_cs_configcheck, NULL);
139         if (i != 0)
140                 goto failed;
141 
142         if (!link->irq)
143                 goto failed;
144 
145         i = pcmcia_enable_device(link);
146         if (i != 0)
147                 goto failed;
148 
149         icard.para[0] = link->irq;
150         icard.para[1] = link->resource[0]->start;
151         icard.protocol = protocol;
152         icard.typ = ISDN_CTYPE_ELSA_PCMCIA;
153 
154         i = hisax_init_pcmcia(link, &(((local_info_t *)link->priv)->busy), &icard);
155         if (i < 0) {
156                 printk(KERN_ERR "elsa_cs: failed to initialize Elsa "
157                        "PCMCIA %d with %pR\n", i, link->resource[0]);
158                 elsa_cs_release(link);
159         } else
160                 ((local_info_t *)link->priv)->cardnr = i;
161 
162         return 0;
163 failed:
164         elsa_cs_release(link);
165         return -ENODEV;
166 } /* elsa_cs_config */
167 
168 static void elsa_cs_release(struct pcmcia_device *link)
169 {
170         local_info_t *local = link->priv;
171 
172         dev_dbg(&link->dev, "elsa_cs_release(0x%p)\n", link);
173 
174         if (local) {
175                 if (local->cardnr >= 0) {
176                         /* no unregister function with hisax */
177                         HiSax_closecard(local->cardnr);
178                 }
179         }
180 
181         pcmcia_disable_device(link);
182 } /* elsa_cs_release */
183 
184 static int elsa_suspend(struct pcmcia_device *link)
185 {
186         local_info_t *dev = link->priv;
187 
188         dev->busy = 1;
189 
190         return 0;
191 }
192 
193 static int elsa_resume(struct pcmcia_device *link)
194 {
195         local_info_t *dev = link->priv;
196 
197         dev->busy = 0;
198 
199         return 0;
200 }
201 
202 static const struct pcmcia_device_id elsa_ids[] = {
203         PCMCIA_DEVICE_PROD_ID12("ELSA AG (Aachen, Germany)", "MicroLink ISDN/MC ", 0x983de2c4, 0x333ba257),
204         PCMCIA_DEVICE_PROD_ID12("ELSA GmbH, Aachen", "MicroLink ISDN/MC ", 0x639e5718, 0x333ba257),
205         PCMCIA_DEVICE_NULL
206 };
207 MODULE_DEVICE_TABLE(pcmcia, elsa_ids);
208 
209 static struct pcmcia_driver elsa_cs_driver = {
210         .owner          = THIS_MODULE,
211         .name           = "elsa_cs",
212         .probe          = elsa_cs_probe,
213         .remove         = elsa_cs_detach,
214         .id_table       = elsa_ids,
215         .suspend        = elsa_suspend,
216         .resume         = elsa_resume,
217 };
218 module_pcmcia_driver(elsa_cs_driver);
219 

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