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teles_cs.c
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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, [email protected]
7  Written by Christof Petig, [email protected]
8 
9  Also inspired by ELSA PCMCIA driver
10  by Klaus Lichtenwalder <[email protected]>
11 
12  Extensions to new hisax_pcmcia by Karsten Keil
13 
14  minor changes to be compatible with kernel 2.4.x
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, [email protected], Karsten Keil, [email protected]");
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) __devinit;
47 static void teles_cs_release(struct pcmcia_device *link);
48 static void teles_detach(struct pcmcia_device *p_dev) __devexit;
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 __devinit 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 __devexit 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 __devinit 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 = __devexit_p(teles_detach),
196  .id_table = teles_ids,
197  .suspend = teles_suspend,
198  .resume = teles_resume,
199 };
200 
201 static int __init init_teles_cs(void)
202 {
203  return pcmcia_register_driver(&teles_cs_driver);
204 }
205 
206 static void __exit exit_teles_cs(void)
207 {
208  pcmcia_unregister_driver(&teles_cs_driver);
209 }
210 
211 module_init(init_teles_cs);
212 module_exit(exit_teles_cs);