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Linux/drivers/isdn/hisax/teles_cs.c

  1 /* $Id: teles_cs.c,v 1.1.2.2 2004/01/25 15:07:06 keil Exp $ */
  2 /*======================================================================
  3 
  4   A teles S0 PCMCIA client driver
  5 
  6   Based on skeleton by David Hinds, dhinds@allegro.stanford.edu
  7   Written by Christof Petig, christof.petig@wtal.de
  8 
  9   Also inspired by ELSA PCMCIA driver
 10   by Klaus Lichtenwalder <Lichtenwalder@ACM.org>
 11 
 12   Extensions to new hisax_pcmcia by Karsten Keil
 13 
 14   minor changes to be compatible with kernel 2.4.x
 15   by Jan.Schubert@GMX.li
 16 
 17   ======================================================================*/
 18 
 19 #include <linux/kernel.h>
 20 #include <linux/module.h>
 21 #include <linux/init.h>
 22 #include <linux/ptrace.h>
 23 #include <linux/slab.h>
 24 #include <linux/string.h>
 25 #include <linux/timer.h>
 26 #include <linux/ioport.h>
 27 #include <asm/io.h>
 28 
 29 #include <pcmcia/cistpl.h>
 30 #include <pcmcia/cisreg.h>
 31 #include <pcmcia/ds.h>
 32 #include "hisax_cfg.h"
 33 
 34 MODULE_DESCRIPTION("ISDN4Linux: PCMCIA client driver for Teles PCMCIA cards");
 35 MODULE_AUTHOR("Christof Petig, christof.petig@wtal.de, Karsten Keil, kkeil@suse.de");
 36 MODULE_LICENSE("GPL");
 37 
 38 
 39 /*====================================================================*/
 40 
 41 /* Parameters that can be set with 'insmod' */
 42 
 43 static int protocol = 2;        /* EURO-ISDN Default */
 44 module_param(protocol, int, 0);
 45 
 46 static int teles_cs_config(struct pcmcia_device *link);
 47 static void teles_cs_release(struct pcmcia_device *link);
 48 static void teles_detach(struct pcmcia_device *p_dev);
 49 
 50 typedef struct local_info_t {
 51         struct pcmcia_device    *p_dev;
 52         int                 busy;
 53         int                     cardnr;
 54 } local_info_t;
 55 
 56 static int teles_probe(struct pcmcia_device *link)
 57 {
 58         local_info_t *local;
 59 
 60         dev_dbg(&link->dev, "teles_attach()\n");
 61 
 62         /* Allocate space for private device-specific data */
 63         local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
 64         if (!local) return -ENOMEM;
 65         local->cardnr = -1;
 66 
 67         local->p_dev = link;
 68         link->priv = local;
 69 
 70         link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
 71 
 72         return teles_cs_config(link);
 73 } /* teles_attach */
 74 
 75 static void teles_detach(struct pcmcia_device *link)
 76 {
 77         local_info_t *info = link->priv;
 78 
 79         dev_dbg(&link->dev, "teles_detach(0x%p)\n", link);
 80 
 81         info->busy = 1;
 82         teles_cs_release(link);
 83 
 84         kfree(info);
 85 } /* teles_detach */
 86 
 87 static int teles_cs_configcheck(struct pcmcia_device *p_dev, void *priv_data)
 88 {
 89         int j;
 90 
 91         p_dev->io_lines = 5;
 92         p_dev->resource[0]->end = 96;
 93         p_dev->resource[0]->flags &= IO_DATA_PATH_WIDTH;
 94         p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
 95 
 96         if ((p_dev->resource[0]->end) && p_dev->resource[0]->start) {
 97                 printk(KERN_INFO "(teles_cs: looks like the 96 model)\n");
 98                 if (!pcmcia_request_io(p_dev))
 99                         return 0;
100         } else {
101                 printk(KERN_INFO "(teles_cs: looks like the 97 model)\n");
102                 for (j = 0x2f0; j > 0x100; j -= 0x10) {
103                         p_dev->resource[0]->start = j;
104                         if (!pcmcia_request_io(p_dev))
105                                 return 0;
106                 }
107         }
108         return -ENODEV;
109 }
110 
111 static int teles_cs_config(struct pcmcia_device *link)
112 {
113         int i;
114         IsdnCard_t icard;
115 
116         dev_dbg(&link->dev, "teles_config(0x%p)\n", link);
117 
118         i = pcmcia_loop_config(link, teles_cs_configcheck, NULL);
119         if (i != 0)
120                 goto cs_failed;
121 
122         if (!link->irq)
123                 goto cs_failed;
124 
125         i = pcmcia_enable_device(link);
126         if (i != 0)
127                 goto cs_failed;
128 
129         icard.para[0] = link->irq;
130         icard.para[1] = link->resource[0]->start;
131         icard.protocol = protocol;
132         icard.typ = ISDN_CTYPE_TELESPCMCIA;
133 
134         i = hisax_init_pcmcia(link, &(((local_info_t *)link->priv)->busy), &icard);
135         if (i < 0) {
136                 printk(KERN_ERR "teles_cs: failed to initialize Teles PCMCIA %d at i/o %#x\n",
137                        i, (unsigned int) link->resource[0]->start);
138                 teles_cs_release(link);
139                 return -ENODEV;
140         }
141 
142         ((local_info_t *)link->priv)->cardnr = i;
143         return 0;
144 
145 cs_failed:
146         teles_cs_release(link);
147         return -ENODEV;
148 } /* teles_cs_config */
149 
150 static void teles_cs_release(struct pcmcia_device *link)
151 {
152         local_info_t *local = link->priv;
153 
154         dev_dbg(&link->dev, "teles_cs_release(0x%p)\n", link);
155 
156         if (local) {
157                 if (local->cardnr >= 0) {
158                         /* no unregister function with hisax */
159                         HiSax_closecard(local->cardnr);
160                 }
161         }
162 
163         pcmcia_disable_device(link);
164 } /* teles_cs_release */
165 
166 static int teles_suspend(struct pcmcia_device *link)
167 {
168         local_info_t *dev = link->priv;
169 
170         dev->busy = 1;
171 
172         return 0;
173 }
174 
175 static int teles_resume(struct pcmcia_device *link)
176 {
177         local_info_t *dev = link->priv;
178 
179         dev->busy = 0;
180 
181         return 0;
182 }
183 
184 
185 static const struct pcmcia_device_id teles_ids[] = {
186         PCMCIA_DEVICE_PROD_ID12("TELES", "S0/PC", 0x67b50eae, 0xe9e70119),
187         PCMCIA_DEVICE_NULL,
188 };
189 MODULE_DEVICE_TABLE(pcmcia, teles_ids);
190 
191 static struct pcmcia_driver teles_cs_driver = {
192         .owner          = THIS_MODULE,
193         .name           = "teles_cs",
194         .probe          = teles_probe,
195         .remove         = teles_detach,
196         .id_table       = teles_ids,
197         .suspend        = teles_suspend,
198         .resume         = teles_resume,
199 };
200 module_pcmcia_driver(teles_cs_driver);
201 

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