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com20020_cs.c
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1 /*
2  * Linux ARCnet driver - COM20020 PCMCIA support
3  *
4  * Written 1994-1999 by Avery Pennarun,
5  * based on an ISA version by David Woodhouse.
6  * Derived from ibmtr_cs.c by Steve Kipisz (pcmcia-cs 3.1.4)
7  * which was derived from pcnet_cs.c by David Hinds.
8  * Some additional portions derived from skeleton.c by Donald Becker.
9  *
10  * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
11  * for sponsoring the further development of this driver.
12  *
13  * **********************
14  *
15  * The original copyright of skeleton.c was as follows:
16  *
17  * skeleton.c Written 1993 by Donald Becker.
18  * Copyright 1993 United States Government as represented by the
19  * Director, National Security Agency. This software may only be used
20  * and distributed according to the terms of the GNU General Public License as
21  * modified by SRC, incorporated herein by reference.
22  *
23  * **********************
24  * Changes:
25  * Arnaldo Carvalho de Melo <[email protected]> - 08/08/2000
26  * - reorganize kmallocs in com20020_attach, checking all for failure
27  * and releasing the previous allocations if one fails
28  * **********************
29  *
30  * For more details, see drivers/net/arcnet.c
31  *
32  * **********************
33  */
34 #include <linux/kernel.h>
35 #include <linux/init.h>
36 #include <linux/ptrace.h>
37 #include <linux/slab.h>
38 #include <linux/string.h>
39 #include <linux/timer.h>
40 #include <linux/delay.h>
41 #include <linux/module.h>
42 #include <linux/netdevice.h>
43 #include <linux/arcdevice.h>
44 #include <linux/com20020.h>
45 
46 #include <pcmcia/cistpl.h>
47 #include <pcmcia/ds.h>
48 
49 #include <asm/io.h>
50 
51 #define VERSION "arcnet: COM20020 PCMCIA support loaded.\n"
52 
53 
54 static void regdump(struct net_device *dev)
55 {
56 #ifdef DEBUG
57  int ioaddr = dev->base_addr;
58  int count;
59 
60  netdev_dbg(dev, "register dump:\n");
61  for (count = ioaddr; count < ioaddr + 16; count++)
62  {
63  if (!(count % 16))
64  pr_cont("%04X:", count);
65  pr_cont(" %02X", inb(count));
66  }
67  pr_cont("\n");
68 
69  netdev_dbg(dev, "buffer0 dump:\n");
70  /* set up the address register */
71  count = 0;
72  outb((count >> 8) | RDDATAflag | AUTOINCflag, _ADDR_HI);
73  outb(count & 0xff, _ADDR_LO);
74 
75  for (count = 0; count < 256+32; count++)
76  {
77  if (!(count % 16))
78  pr_cont("%04X:", count);
79 
80  /* copy the data */
81  pr_cont(" %02X", inb(_MEMDATA));
82  }
83  pr_cont("\n");
84 #endif
85 }
86 
87 
88 
89 /*====================================================================*/
90 
91 /* Parameters that can be set with 'insmod' */
92 
93 static int node;
94 static int timeout = 3;
95 static int backplane;
96 static int clockp;
97 static int clockm;
98 
99 module_param(node, int, 0);
100 module_param(timeout, int, 0);
101 module_param(backplane, int, 0);
102 module_param(clockp, int, 0);
103 module_param(clockm, int, 0);
104 
105 MODULE_LICENSE("GPL");
106 
107 /*====================================================================*/
108 
109 static int com20020_config(struct pcmcia_device *link);
110 static void com20020_release(struct pcmcia_device *link);
111 
112 static void com20020_detach(struct pcmcia_device *p_dev);
113 
114 /*====================================================================*/
115 
116 typedef struct com20020_dev_t {
117  struct net_device *dev;
119 
120 static int com20020_probe(struct pcmcia_device *p_dev)
121 {
123  struct net_device *dev;
124  struct arcnet_local *lp;
125 
126  dev_dbg(&p_dev->dev, "com20020_attach()\n");
127 
128  /* Create new network device */
129  info = kzalloc(sizeof(struct com20020_dev_t), GFP_KERNEL);
130  if (!info)
131  goto fail_alloc_info;
132 
133  dev = alloc_arcdev("");
134  if (!dev)
135  goto fail_alloc_dev;
136 
137  lp = netdev_priv(dev);
138  lp->timeout = timeout;
139  lp->backplane = backplane;
140  lp->clockp = clockp;
141  lp->clockm = clockm & 3;
142  lp->hw.owner = THIS_MODULE;
143 
144  /* fill in our module parameters as defaults */
145  dev->dev_addr[0] = node;
146 
147  p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
148  p_dev->resource[0]->end = 16;
149  p_dev->config_flags |= CONF_ENABLE_IRQ;
150 
151  info->dev = dev;
152  p_dev->priv = info;
153 
154  return com20020_config(p_dev);
155 
156 fail_alloc_dev:
157  kfree(info);
158 fail_alloc_info:
159  return -ENOMEM;
160 } /* com20020_attach */
161 
162 static void com20020_detach(struct pcmcia_device *link)
163 {
164  struct com20020_dev_t *info = link->priv;
165  struct net_device *dev = info->dev;
166 
167  dev_dbg(&link->dev, "detach...\n");
168 
169  dev_dbg(&link->dev, "com20020_detach\n");
170 
171  dev_dbg(&link->dev, "unregister...\n");
172 
173  unregister_netdev(dev);
174 
175  /*
176  * this is necessary because we register our IRQ separately
177  * from card services.
178  */
179  if (dev->irq)
180  free_irq(dev->irq, dev);
181 
182  com20020_release(link);
183 
184  /* Unlink device structure, free bits */
185  dev_dbg(&link->dev, "unlinking...\n");
186  if (link->priv)
187  {
188  dev = info->dev;
189  if (dev)
190  {
191  dev_dbg(&link->dev, "kfree...\n");
192  free_netdev(dev);
193  }
194  dev_dbg(&link->dev, "kfree2...\n");
195  kfree(info);
196  }
197 
198 } /* com20020_detach */
199 
200 static int com20020_config(struct pcmcia_device *link)
201 {
202  struct arcnet_local *lp;
204  struct net_device *dev;
205  int i, ret;
206  int ioaddr;
207 
208  info = link->priv;
209  dev = info->dev;
210 
211  dev_dbg(&link->dev, "config...\n");
212 
213  dev_dbg(&link->dev, "com20020_config\n");
214 
215  dev_dbg(&link->dev, "baseport1 is %Xh\n",
216  (unsigned int) link->resource[0]->start);
217 
218  i = -ENODEV;
219  link->io_lines = 16;
220 
221  if (!link->resource[0]->start)
222  {
223  for (ioaddr = 0x100; ioaddr < 0x400; ioaddr += 0x10)
224  {
225  link->resource[0]->start = ioaddr;
226  i = pcmcia_request_io(link);
227  if (i == 0)
228  break;
229  }
230  }
231  else
232  i = pcmcia_request_io(link);
233 
234  if (i != 0)
235  {
236  dev_dbg(&link->dev, "requestIO failed totally!\n");
237  goto failed;
238  }
239 
240  ioaddr = dev->base_addr = link->resource[0]->start;
241  dev_dbg(&link->dev, "got ioaddr %Xh\n", ioaddr);
242 
243  dev_dbg(&link->dev, "request IRQ %d\n",
244  link->irq);
245  if (!link->irq)
246  {
247  dev_dbg(&link->dev, "requestIRQ failed totally!\n");
248  goto failed;
249  }
250 
251  dev->irq = link->irq;
252 
253  ret = pcmcia_enable_device(link);
254  if (ret)
255  goto failed;
256 
257  if (com20020_check(dev))
258  {
259  regdump(dev);
260  goto failed;
261  }
262 
263  lp = netdev_priv(dev);
264  lp->card_name = "PCMCIA COM20020";
265  lp->card_flags = ARC_CAN_10MBIT; /* pretend all of them can 10Mbit */
266 
267  SET_NETDEV_DEV(dev, &link->dev);
268 
269  i = com20020_found(dev, 0); /* calls register_netdev */
270 
271  if (i != 0) {
272  dev_notice(&link->dev,
273  "com20020_found() failed\n");
274  goto failed;
275  }
276 
277  netdev_dbg(dev, "port %#3lx, irq %d\n",
278  dev->base_addr, dev->irq);
279  return 0;
280 
281 failed:
282  dev_dbg(&link->dev, "com20020_config failed...\n");
283  com20020_release(link);
284  return -ENODEV;
285 } /* com20020_config */
286 
287 static void com20020_release(struct pcmcia_device *link)
288 {
289  dev_dbg(&link->dev, "com20020_release\n");
290  pcmcia_disable_device(link);
291 }
292 
293 static int com20020_suspend(struct pcmcia_device *link)
294 {
295  com20020_dev_t *info = link->priv;
296  struct net_device *dev = info->dev;
297 
298  if (link->open)
299  netif_device_detach(dev);
300 
301  return 0;
302 }
303 
304 static int com20020_resume(struct pcmcia_device *link)
305 {
306  com20020_dev_t *info = link->priv;
307  struct net_device *dev = info->dev;
308 
309  if (link->open) {
310  int ioaddr = dev->base_addr;
311  struct arcnet_local *lp = netdev_priv(dev);
312  ARCRESET;
313  }
314 
315  return 0;
316 }
317 
318 static const struct pcmcia_device_id com20020_ids[] = {
319  PCMCIA_DEVICE_PROD_ID12("Contemporary Control Systems, Inc.",
320  "PCM20 Arcnet Adapter", 0x59991666, 0x95dfffaf),
321  PCMCIA_DEVICE_PROD_ID12("SoHard AG",
322  "SH ARC PCMCIA", 0xf8991729, 0x69dff0c7),
323  PCMCIA_DEVICE_NULL
324 };
325 MODULE_DEVICE_TABLE(pcmcia, com20020_ids);
326 
327 static struct pcmcia_driver com20020_cs_driver = {
328  .owner = THIS_MODULE,
329  .name = "com20020_cs",
330  .probe = com20020_probe,
331  .remove = com20020_detach,
332  .id_table = com20020_ids,
333  .suspend = com20020_suspend,
334  .resume = com20020_resume,
335 };
336 
337 static int __init init_com20020_cs(void)
338 {
339  return pcmcia_register_driver(&com20020_cs_driver);
340 }
341 
342 static void __exit exit_com20020_cs(void)
343 {
344  pcmcia_unregister_driver(&com20020_cs_driver);
345 }
346 
347 module_init(init_com20020_cs);
348 module_exit(exit_com20020_cs);