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Linux/drivers/net/arcnet/com20020_cs.c

  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 <acme@conectiva.com.br> - 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/ptrace.h>
 36 #include <linux/slab.h>
 37 #include <linux/string.h>
 38 #include <linux/timer.h>
 39 #include <linux/delay.h>
 40 #include <linux/module.h>
 41 #include <linux/netdevice.h>
 42 #include <linux/arcdevice.h>
 43 #include <linux/com20020.h>
 44 
 45 #include <pcmcia/cistpl.h>
 46 #include <pcmcia/ds.h>
 47 
 48 #include <asm/io.h>
 49 
 50 #define VERSION "arcnet: COM20020 PCMCIA support loaded.\n"
 51 
 52 
 53 static void regdump(struct net_device *dev)
 54 {
 55 #ifdef DEBUG
 56     int ioaddr = dev->base_addr;
 57     int count;
 58     
 59     netdev_dbg(dev, "register dump:\n");
 60     for (count = ioaddr; count < ioaddr + 16; count++)
 61     {
 62         if (!(count % 16))
 63             pr_cont("%04X:", count);
 64         pr_cont(" %02X", inb(count));
 65     }
 66     pr_cont("\n");
 67     
 68     netdev_dbg(dev, "buffer0 dump:\n");
 69         /* set up the address register */
 70         count = 0;
 71         outb((count >> 8) | RDDATAflag | AUTOINCflag, _ADDR_HI);
 72         outb(count & 0xff, _ADDR_LO);
 73     
 74     for (count = 0; count < 256+32; count++)
 75     {
 76         if (!(count % 16))
 77             pr_cont("%04X:", count);
 78         
 79         /* copy the data */
 80         pr_cont(" %02X", inb(_MEMDATA));
 81     }
 82     pr_cont("\n");
 83 #endif
 84 }
 85 
 86 
 87 
 88 /*====================================================================*/
 89 
 90 /* Parameters that can be set with 'insmod' */
 91 
 92 static int node;
 93 static int timeout = 3;
 94 static int backplane;
 95 static int clockp;
 96 static int clockm;
 97 
 98 module_param(node, int, 0);
 99 module_param(timeout, int, 0);
100 module_param(backplane, int, 0);
101 module_param(clockp, int, 0);
102 module_param(clockm, int, 0);
103 
104 MODULE_LICENSE("GPL");
105 
106 /*====================================================================*/
107 
108 static int com20020_config(struct pcmcia_device *link);
109 static void com20020_release(struct pcmcia_device *link);
110 
111 static void com20020_detach(struct pcmcia_device *p_dev);
112 
113 /*====================================================================*/
114 
115 typedef struct com20020_dev_t {
116     struct net_device       *dev;
117 } com20020_dev_t;
118 
119 static int com20020_probe(struct pcmcia_device *p_dev)
120 {
121     com20020_dev_t *info;
122     struct net_device *dev;
123     struct arcnet_local *lp;
124 
125     dev_dbg(&p_dev->dev, "com20020_attach()\n");
126 
127     /* Create new network device */
128     info = kzalloc(sizeof(struct com20020_dev_t), GFP_KERNEL);
129     if (!info)
130         goto fail_alloc_info;
131 
132     dev = alloc_arcdev("");
133     if (!dev)
134         goto fail_alloc_dev;
135 
136     lp = netdev_priv(dev);
137     lp->timeout = timeout;
138     lp->backplane = backplane;
139     lp->clockp = clockp;
140     lp->clockm = clockm & 3;
141     lp->hw.owner = THIS_MODULE;
142 
143     /* fill in our module parameters as defaults */
144     dev->dev_addr[0] = node;
145 
146     p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
147     p_dev->resource[0]->end = 16;
148     p_dev->config_flags |= CONF_ENABLE_IRQ;
149 
150     info->dev = dev;
151     p_dev->priv = info;
152 
153     return com20020_config(p_dev);
154 
155 fail_alloc_dev:
156     kfree(info);
157 fail_alloc_info:
158     return -ENOMEM;
159 } /* com20020_attach */
160 
161 static void com20020_detach(struct pcmcia_device *link)
162 {
163     struct com20020_dev_t *info = link->priv;
164     struct net_device *dev = info->dev;
165 
166     dev_dbg(&link->dev, "detach...\n");
167 
168     dev_dbg(&link->dev, "com20020_detach\n");
169 
170     dev_dbg(&link->dev, "unregister...\n");
171 
172     unregister_netdev(dev);
173 
174     /*
175      * this is necessary because we register our IRQ separately
176      * from card services.
177      */
178     if (dev->irq)
179             free_irq(dev->irq, dev);
180 
181     com20020_release(link);
182 
183     /* Unlink device structure, free bits */
184     dev_dbg(&link->dev, "unlinking...\n");
185     if (link->priv)
186     {
187         dev = info->dev;
188         if (dev)
189         {
190             dev_dbg(&link->dev, "kfree...\n");
191             free_netdev(dev);
192         }
193         dev_dbg(&link->dev, "kfree2...\n");
194         kfree(info);
195     }
196 
197 } /* com20020_detach */
198 
199 static int com20020_config(struct pcmcia_device *link)
200 {
201     struct arcnet_local *lp;
202     com20020_dev_t *info;
203     struct net_device *dev;
204     int i, ret;
205     int ioaddr;
206 
207     info = link->priv;
208     dev = info->dev;
209 
210     dev_dbg(&link->dev, "config...\n");
211 
212     dev_dbg(&link->dev, "com20020_config\n");
213 
214     dev_dbg(&link->dev, "baseport1 is %Xh\n",
215             (unsigned int) link->resource[0]->start);
216 
217     i = -ENODEV;
218     link->io_lines = 16;
219 
220     if (!link->resource[0]->start)
221     {
222         for (ioaddr = 0x100; ioaddr < 0x400; ioaddr += 0x10)
223         {
224             link->resource[0]->start = ioaddr;
225             i = pcmcia_request_io(link);
226             if (i == 0)
227                 break;
228         }
229     }
230     else
231         i = pcmcia_request_io(link);
232     
233     if (i != 0)
234     {
235         dev_dbg(&link->dev, "requestIO failed totally!\n");
236         goto failed;
237     }
238         
239     ioaddr = dev->base_addr = link->resource[0]->start;
240     dev_dbg(&link->dev, "got ioaddr %Xh\n", ioaddr);
241 
242     dev_dbg(&link->dev, "request IRQ %d\n",
243             link->irq);
244     if (!link->irq)
245     {
246         dev_dbg(&link->dev, "requestIRQ failed totally!\n");
247         goto failed;
248     }
249 
250     dev->irq = link->irq;
251 
252     ret = pcmcia_enable_device(link);
253     if (ret)
254             goto failed;
255 
256     if (com20020_check(dev))
257     {
258         regdump(dev);
259         goto failed;
260     }
261     
262     lp = netdev_priv(dev);
263     lp->card_name = "PCMCIA COM20020";
264     lp->card_flags = ARC_CAN_10MBIT; /* pretend all of them can 10Mbit */
265 
266     SET_NETDEV_DEV(dev, &link->dev);
267 
268     i = com20020_found(dev, 0); /* calls register_netdev */
269     
270     if (i != 0) {
271         dev_notice(&link->dev,
272                    "com20020_found() failed\n");
273         goto failed;
274     }
275 
276     netdev_dbg(dev, "port %#3lx, irq %d\n",
277                dev->base_addr, dev->irq);
278     return 0;
279 
280 failed:
281     dev_dbg(&link->dev, "com20020_config failed...\n");
282     com20020_release(link);
283     return -ENODEV;
284 } /* com20020_config */
285 
286 static void com20020_release(struct pcmcia_device *link)
287 {
288         dev_dbg(&link->dev, "com20020_release\n");
289         pcmcia_disable_device(link);
290 }
291 
292 static int com20020_suspend(struct pcmcia_device *link)
293 {
294         com20020_dev_t *info = link->priv;
295         struct net_device *dev = info->dev;
296 
297         if (link->open)
298                 netif_device_detach(dev);
299 
300         return 0;
301 }
302 
303 static int com20020_resume(struct pcmcia_device *link)
304 {
305         com20020_dev_t *info = link->priv;
306         struct net_device *dev = info->dev;
307 
308         if (link->open) {
309                 int ioaddr = dev->base_addr;
310                 struct arcnet_local *lp = netdev_priv(dev);
311                 ARCRESET;
312         }
313 
314         return 0;
315 }
316 
317 static const struct pcmcia_device_id com20020_ids[] = {
318         PCMCIA_DEVICE_PROD_ID12("Contemporary Control Systems, Inc.",
319                         "PCM20 Arcnet Adapter", 0x59991666, 0x95dfffaf),
320         PCMCIA_DEVICE_PROD_ID12("SoHard AG",
321                         "SH ARC PCMCIA", 0xf8991729, 0x69dff0c7),
322         PCMCIA_DEVICE_NULL
323 };
324 MODULE_DEVICE_TABLE(pcmcia, com20020_ids);
325 
326 static struct pcmcia_driver com20020_cs_driver = {
327         .owner          = THIS_MODULE,
328         .name           = "com20020_cs",
329         .probe          = com20020_probe,
330         .remove         = com20020_detach,
331         .id_table       = com20020_ids,
332         .suspend        = com20020_suspend,
333         .resume         = com20020_resume,
334 };
335 module_pcmcia_driver(com20020_cs_driver);
336 

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