2 * Linux ARCnet driver - COM20020 PCMCIA support
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.
10 * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
11 * for sponsoring the further development of this driver.
13 * **********************
15 * The original copyright of skeleton.c was as follows:
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.
23 * **********************
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 * **********************
30 * For more details, see drivers/net/arcnet.c
32 * **********************
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>
46 #include <pcmcia/cs_types.h>
47 #include <pcmcia/cs.h>
48 #include <pcmcia/cistpl.h>
49 #include <pcmcia/ds.h>
52 #include <asm/system.h>
54 #define VERSION "arcnet: COM20020 PCMCIA support loaded.\n"
58 static int pc_debug = PCMCIA_DEBUG;
59 module_param(pc_debug, int, 0);
60 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
62 static void regdump(struct net_device *dev)
64 int ioaddr = dev->base_addr;
67 printk("com20020 register dump:\n");
68 for (count = ioaddr; count < ioaddr + 16; count++)
71 printk("\n%04X: ", count);
72 printk("%02X ", inb(count));
76 printk("buffer0 dump:\n");
77 /* set up the address register */
79 outb((count >> 8) | RDDATAflag | AUTOINCflag, _ADDR_HI);
80 outb(count & 0xff, _ADDR_LO);
82 for (count = 0; count < 256+32; count++)
85 printk("\n%04X: ", count);
88 printk("%02X ", inb(_MEMDATA));
95 #define DEBUG(n, args...) do { } while (0)
96 static inline void regdump(struct net_device *dev) { }
101 /*====================================================================*/
103 /* Parameters that can be set with 'insmod' */
106 static int timeout = 3;
107 static int backplane;
111 module_param(node, int, 0);
112 module_param(timeout, int, 0);
113 module_param(backplane, int, 0);
114 module_param(clockp, int, 0);
115 module_param(clockm, int, 0);
117 MODULE_LICENSE("GPL");
119 /*====================================================================*/
121 static void com20020_config(dev_link_t *link);
122 static void com20020_release(dev_link_t *link);
123 static int com20020_event(event_t event, int priority,
124 event_callback_args_t *args);
126 static dev_info_t dev_info = "com20020_cs";
128 static dev_link_t *com20020_attach(void);
129 static void com20020_detach(dev_link_t *);
131 static dev_link_t *dev_list;
133 /*====================================================================*/
135 typedef struct com20020_dev_t {
136 struct net_device *dev;
140 /*======================================================================
142 com20020_attach() creates an "instance" of the driver, allocating
143 local data structures for one device. The device is registered
146 ======================================================================*/
148 static dev_link_t *com20020_attach(void)
150 client_reg_t client_reg;
152 com20020_dev_t *info;
153 struct net_device *dev;
155 struct arcnet_local *lp;
157 DEBUG(0, "com20020_attach()\n");
159 /* Create new network device */
160 link = kmalloc(sizeof(struct dev_link_t), GFP_KERNEL);
164 info = kmalloc(sizeof(struct com20020_dev_t), GFP_KERNEL);
166 goto fail_alloc_info;
168 dev = alloc_arcdev("");
172 memset(info, 0, sizeof(struct com20020_dev_t));
173 memset(link, 0, sizeof(struct dev_link_t));
175 lp->timeout = timeout;
176 lp->backplane = backplane;
178 lp->clockm = clockm & 3;
179 lp->hw.owner = THIS_MODULE;
181 /* fill in our module parameters as defaults */
182 dev->dev_addr[0] = node;
184 link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
185 link->io.NumPorts1 = 16;
186 link->io.IOAddrLines = 16;
187 link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
188 link->irq.IRQInfo1 = IRQ_LEVEL_ID;
189 link->conf.Attributes = CONF_ENABLE_IRQ;
191 link->conf.IntType = INT_MEMORY_AND_IO;
192 link->conf.Present = PRESENT_OPTION;
195 link->irq.Instance = info->dev = dev;
198 /* Register with Card Services */
199 link->next = dev_list;
201 client_reg.dev_info = &dev_info;
202 client_reg.Version = 0x0210;
203 client_reg.event_callback_args.client_data = link;
204 ret = pcmcia_register_client(&link->handle, &client_reg);
206 cs_error(link->handle, RegisterClient, ret);
207 com20020_detach(link);
218 } /* com20020_attach */
220 /*======================================================================
222 This deletes a driver "instance". The device is de-registered
223 with Card Services. If it has been released, all local data
224 structures are freed. Otherwise, the structures will be freed
225 when the device is released.
227 ======================================================================*/
229 static void com20020_detach(dev_link_t *link)
231 struct com20020_dev_t *info = link->priv;
233 struct net_device *dev;
235 DEBUG(1,"detach...\n");
237 DEBUG(0, "com20020_detach(0x%p)\n", link);
239 /* Locate device structure */
240 for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
241 if (*linkp == link) break;
248 DEBUG(1,"unregister...\n");
250 unregister_netdev(dev);
253 * this is necessary because we register our IRQ separately
254 * from card services.
257 free_irq(dev->irq, dev);
260 if (link->state & DEV_CONFIG)
261 com20020_release(link);
264 pcmcia_deregister_client(link->handle);
266 /* Unlink device structure, free bits */
267 DEBUG(1,"unlinking...\n");
274 DEBUG(1,"kfree...\n");
277 DEBUG(1,"kfree2...\n");
280 DEBUG(1,"kfree3...\n");
283 } /* com20020_detach */
285 /*======================================================================
287 com20020_config() is scheduled to run after a CARD_INSERTION event
288 is received, to configure the PCMCIA socket, and to make the
289 device available to the system.
291 ======================================================================*/
293 #define CS_CHECK(fn, ret) \
294 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
296 static void com20020_config(dev_link_t *link)
298 struct arcnet_local *lp;
299 client_handle_t handle;
302 com20020_dev_t *info;
303 struct net_device *dev;
304 int i, last_ret, last_fn;
308 handle = link->handle;
312 DEBUG(1,"config...\n");
314 DEBUG(0, "com20020_config(0x%p)\n", link);
316 tuple.Attributes = 0;
317 tuple.TupleData = buf;
318 tuple.TupleDataMax = 64;
319 tuple.TupleOffset = 0;
320 tuple.DesiredTuple = CISTPL_CONFIG;
321 CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
322 CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
323 CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
324 link->conf.ConfigBase = parse.config.base;
327 link->state |= DEV_CONFIG;
329 DEBUG(1,"arcnet: baseport1 is %Xh\n", link->io.BasePort1);
331 if (!link->io.BasePort1)
333 for (ioaddr = 0x100; ioaddr < 0x400; ioaddr += 0x10)
335 link->io.BasePort1 = ioaddr;
336 i = pcmcia_request_io(link->handle, &link->io);
342 i = pcmcia_request_io(link->handle, &link->io);
346 DEBUG(1,"arcnet: requestIO failed totally!\n");
350 ioaddr = dev->base_addr = link->io.BasePort1;
351 DEBUG(1,"arcnet: got ioaddr %Xh\n", ioaddr);
353 DEBUG(1,"arcnet: request IRQ %d (%Xh/%Xh)\n",
354 link->irq.AssignedIRQ,
355 link->irq.IRQInfo1, link->irq.IRQInfo2);
356 i = pcmcia_request_irq(link->handle, &link->irq);
359 DEBUG(1,"arcnet: requestIRQ failed totally!\n");
363 dev->irq = link->irq.AssignedIRQ;
365 CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link->handle, &link->conf));
367 if (com20020_check(dev))
374 lp->card_name = "PCMCIA COM20020";
375 lp->card_flags = ARC_CAN_10MBIT; /* pretend all of them can 10Mbit */
377 link->dev = &info->node;
378 link->state &= ~DEV_CONFIG_PENDING;
379 SET_NETDEV_DEV(dev, &handle_to_dev(handle));
381 i = com20020_found(dev, 0); /* calls register_netdev */
384 DEBUG(1,KERN_NOTICE "com20020_cs: com20020_found() failed\n");
389 strcpy(info->node.dev_name, dev->name);
391 DEBUG(1,KERN_INFO "%s: port %#3lx, irq %d\n",
392 dev->name, dev->base_addr, dev->irq);
396 cs_error(link->handle, last_fn, last_ret);
398 DEBUG(1,"com20020_config failed...\n");
399 com20020_release(link);
400 } /* com20020_config */
402 /*======================================================================
404 After a card is removed, com20020_release() will unregister the net
405 device, and release the PCMCIA configuration. If the device is
406 still open, this will be postponed until it is closed.
408 ======================================================================*/
410 static void com20020_release(dev_link_t *link)
413 DEBUG(1,"release...\n");
415 DEBUG(0, "com20020_release(0x%p)\n", link);
417 pcmcia_release_configuration(link->handle);
418 pcmcia_release_io(link->handle, &link->io);
419 pcmcia_release_irq(link->handle, &link->irq);
421 link->state &= ~(DEV_CONFIG | DEV_RELEASE_PENDING);
424 /*======================================================================
426 The card status event handler. Mostly, this schedules other
427 stuff to run after an event is received. A CARD_REMOVAL event
428 also sets some flags to discourage the net drivers from trying
429 to talk to the card any more.
431 ======================================================================*/
433 static int com20020_event(event_t event, int priority,
434 event_callback_args_t *args)
436 dev_link_t *link = args->client_data;
437 com20020_dev_t *info = link->priv;
438 struct net_device *dev = info->dev;
440 DEBUG(1, "com20020_event(0x%06x)\n", event);
443 case CS_EVENT_CARD_REMOVAL:
444 link->state &= ~DEV_PRESENT;
445 if (link->state & DEV_CONFIG)
446 netif_device_detach(dev);
448 case CS_EVENT_CARD_INSERTION:
449 link->state |= DEV_PRESENT;
450 com20020_config(link);
452 case CS_EVENT_PM_SUSPEND:
453 link->state |= DEV_SUSPEND;
454 /* Fall through... */
455 case CS_EVENT_RESET_PHYSICAL:
456 if (link->state & DEV_CONFIG) {
458 netif_device_detach(dev);
460 pcmcia_release_configuration(link->handle);
463 case CS_EVENT_PM_RESUME:
464 link->state &= ~DEV_SUSPEND;
465 /* Fall through... */
466 case CS_EVENT_CARD_RESET:
467 if (link->state & DEV_CONFIG) {
468 pcmcia_request_configuration(link->handle, &link->conf);
470 int ioaddr = dev->base_addr;
471 struct arcnet_local *lp = dev->priv;
478 } /* com20020_event */
480 static struct pcmcia_device_id com20020_ids[] = {
481 PCMCIA_DEVICE_PROD_ID12("Contemporary Control Systems, Inc.", "PCM20 Arcnet Adapter", 0x59991666, 0x95dfffaf),
484 MODULE_DEVICE_TABLE(pcmcia, com20020_ids);
486 static struct pcmcia_driver com20020_cs_driver = {
487 .owner = THIS_MODULE,
489 .name = "com20020_cs",
491 .attach = com20020_attach,
492 .event = com20020_event,
493 .detach = com20020_detach,
494 .id_table = com20020_ids,
497 static int __init init_com20020_cs(void)
499 return pcmcia_register_driver(&com20020_cs_driver);
502 static void __exit exit_com20020_cs(void)
504 pcmcia_unregister_driver(&com20020_cs_driver);
505 BUG_ON(dev_list != NULL);
508 module_init(init_com20020_cs);
509 module_exit(exit_com20020_cs);