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/version.h>
47 #include <pcmcia/cs_types.h>
48 #include <pcmcia/cs.h>
49 #include <pcmcia/cistpl.h>
50 #include <pcmcia/ds.h>
53 #include <asm/system.h>
55 #define VERSION "arcnet: COM20020 PCMCIA support loaded.\n"
59 static int pc_debug = PCMCIA_DEBUG;
60 module_param(pc_debug, int, 0);
61 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
63 static void regdump(struct net_device *dev)
65 int ioaddr = dev->base_addr;
68 printk("com20020 register dump:\n");
69 for (count = ioaddr; count < ioaddr + 16; count++)
72 printk("\n%04X: ", count);
73 printk("%02X ", inb(count));
77 printk("buffer0 dump:\n");
78 /* set up the address register */
80 outb((count >> 8) | RDDATAflag | AUTOINCflag, _ADDR_HI);
81 outb(count & 0xff, _ADDR_LO);
83 for (count = 0; count < 256+32; count++)
86 printk("\n%04X: ", count);
89 printk("%02X ", inb(_MEMDATA));
96 #define DEBUG(n, args...) do { } while (0)
97 static inline void regdump(struct net_device *dev) { }
102 /*====================================================================*/
104 /* Parameters that can be set with 'insmod' */
107 static int timeout = 3;
108 static int backplane;
112 module_param(node, int, 0);
113 module_param(timeout, int, 0);
114 module_param(backplane, int, 0);
115 module_param(clockp, int, 0);
116 module_param(clockm, int, 0);
118 MODULE_LICENSE("GPL");
120 /*====================================================================*/
122 static void com20020_config(dev_link_t *link);
123 static void com20020_release(dev_link_t *link);
124 static int com20020_event(event_t event, int priority,
125 event_callback_args_t *args);
127 static dev_info_t dev_info = "com20020_cs";
129 static dev_link_t *com20020_attach(void);
130 static void com20020_detach(dev_link_t *);
132 static dev_link_t *dev_list;
134 /*====================================================================*/
136 typedef struct com20020_dev_t {
137 struct net_device *dev;
141 /*======================================================================
143 com20020_attach() creates an "instance" of the driver, allocating
144 local data structures for one device. The device is registered
147 ======================================================================*/
149 static dev_link_t *com20020_attach(void)
151 client_reg_t client_reg;
153 com20020_dev_t *info;
154 struct net_device *dev;
156 struct arcnet_local *lp;
158 DEBUG(0, "com20020_attach()\n");
160 /* Create new network device */
161 link = kmalloc(sizeof(struct dev_link_t), GFP_KERNEL);
165 info = kmalloc(sizeof(struct com20020_dev_t), GFP_KERNEL);
167 goto fail_alloc_info;
169 dev = alloc_arcdev("");
173 memset(info, 0, sizeof(struct com20020_dev_t));
174 memset(link, 0, sizeof(struct dev_link_t));
176 lp->timeout = timeout;
177 lp->backplane = backplane;
179 lp->clockm = clockm & 3;
180 lp->hw.owner = THIS_MODULE;
182 /* fill in our module parameters as defaults */
183 dev->dev_addr[0] = node;
185 link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
186 link->io.NumPorts1 = 16;
187 link->io.IOAddrLines = 16;
188 link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
189 link->irq.IRQInfo1 = IRQ_LEVEL_ID;
190 link->conf.Attributes = CONF_ENABLE_IRQ;
192 link->conf.IntType = INT_MEMORY_AND_IO;
193 link->conf.Present = PRESENT_OPTION;
196 link->irq.Instance = info->dev = dev;
199 /* Register with Card Services */
200 link->next = dev_list;
202 client_reg.dev_info = &dev_info;
203 client_reg.EventMask =
204 CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
205 CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
206 CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
207 client_reg.event_handler = &com20020_event;
208 client_reg.Version = 0x0210;
209 client_reg.event_callback_args.client_data = link;
210 ret = pcmcia_register_client(&link->handle, &client_reg);
212 cs_error(link->handle, RegisterClient, ret);
213 com20020_detach(link);
224 } /* com20020_attach */
226 /*======================================================================
228 This deletes a driver "instance". The device is de-registered
229 with Card Services. If it has been released, all local data
230 structures are freed. Otherwise, the structures will be freed
231 when the device is released.
233 ======================================================================*/
235 static void com20020_detach(dev_link_t *link)
237 struct com20020_dev_t *info = link->priv;
239 struct net_device *dev;
241 DEBUG(1,"detach...\n");
243 DEBUG(0, "com20020_detach(0x%p)\n", link);
245 /* Locate device structure */
246 for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
247 if (*linkp == link) break;
254 DEBUG(1,"unregister...\n");
256 unregister_netdev(dev);
259 * this is necessary because we register our IRQ separately
260 * from card services.
263 free_irq(dev->irq, dev);
266 if (link->state & DEV_CONFIG)
267 com20020_release(link);
270 pcmcia_deregister_client(link->handle);
272 /* Unlink device structure, free bits */
273 DEBUG(1,"unlinking...\n");
280 DEBUG(1,"kfree...\n");
283 DEBUG(1,"kfree2...\n");
286 DEBUG(1,"kfree3...\n");
289 } /* com20020_detach */
291 /*======================================================================
293 com20020_config() is scheduled to run after a CARD_INSERTION event
294 is received, to configure the PCMCIA socket, and to make the
295 device available to the system.
297 ======================================================================*/
299 #define CS_CHECK(fn, ret) \
300 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
302 static void com20020_config(dev_link_t *link)
304 struct arcnet_local *lp;
305 client_handle_t handle;
308 com20020_dev_t *info;
309 struct net_device *dev;
310 int i, last_ret, last_fn;
314 handle = link->handle;
318 DEBUG(1,"config...\n");
320 DEBUG(0, "com20020_config(0x%p)\n", link);
322 tuple.Attributes = 0;
323 tuple.TupleData = buf;
324 tuple.TupleDataMax = 64;
325 tuple.TupleOffset = 0;
326 tuple.DesiredTuple = CISTPL_CONFIG;
327 CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
328 CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
329 CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
330 link->conf.ConfigBase = parse.config.base;
333 link->state |= DEV_CONFIG;
335 DEBUG(1,"arcnet: baseport1 is %Xh\n", link->io.BasePort1);
337 if (!link->io.BasePort1)
339 for (ioaddr = 0x100; ioaddr < 0x400; ioaddr += 0x10)
341 link->io.BasePort1 = ioaddr;
342 i = pcmcia_request_io(link->handle, &link->io);
348 i = pcmcia_request_io(link->handle, &link->io);
352 DEBUG(1,"arcnet: requestIO failed totally!\n");
356 ioaddr = dev->base_addr = link->io.BasePort1;
357 DEBUG(1,"arcnet: got ioaddr %Xh\n", ioaddr);
359 DEBUG(1,"arcnet: request IRQ %d (%Xh/%Xh)\n",
360 link->irq.AssignedIRQ,
361 link->irq.IRQInfo1, link->irq.IRQInfo2);
362 i = pcmcia_request_irq(link->handle, &link->irq);
365 DEBUG(1,"arcnet: requestIRQ failed totally!\n");
369 dev->irq = link->irq.AssignedIRQ;
371 CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link->handle, &link->conf));
373 if (com20020_check(dev))
380 lp->card_name = "PCMCIA COM20020";
381 lp->card_flags = ARC_CAN_10MBIT; /* pretend all of them can 10Mbit */
383 link->dev = &info->node;
384 link->state &= ~DEV_CONFIG_PENDING;
385 SET_NETDEV_DEV(dev, &handle_to_dev(handle));
387 i = com20020_found(dev, 0); /* calls register_netdev */
390 DEBUG(1,KERN_NOTICE "com20020_cs: com20020_found() failed\n");
395 strcpy(info->node.dev_name, dev->name);
397 DEBUG(1,KERN_INFO "%s: port %#3lx, irq %d\n",
398 dev->name, dev->base_addr, dev->irq);
402 cs_error(link->handle, last_fn, last_ret);
404 DEBUG(1,"com20020_config failed...\n");
405 com20020_release(link);
406 } /* com20020_config */
408 /*======================================================================
410 After a card is removed, com20020_release() will unregister the net
411 device, and release the PCMCIA configuration. If the device is
412 still open, this will be postponed until it is closed.
414 ======================================================================*/
416 static void com20020_release(dev_link_t *link)
419 DEBUG(1,"release...\n");
421 DEBUG(0, "com20020_release(0x%p)\n", link);
423 pcmcia_release_configuration(link->handle);
424 pcmcia_release_io(link->handle, &link->io);
425 pcmcia_release_irq(link->handle, &link->irq);
427 link->state &= ~(DEV_CONFIG | DEV_RELEASE_PENDING);
430 /*======================================================================
432 The card status event handler. Mostly, this schedules other
433 stuff to run after an event is received. A CARD_REMOVAL event
434 also sets some flags to discourage the net drivers from trying
435 to talk to the card any more.
437 ======================================================================*/
439 static int com20020_event(event_t event, int priority,
440 event_callback_args_t *args)
442 dev_link_t *link = args->client_data;
443 com20020_dev_t *info = link->priv;
444 struct net_device *dev = info->dev;
446 DEBUG(1, "com20020_event(0x%06x)\n", event);
449 case CS_EVENT_CARD_REMOVAL:
450 link->state &= ~DEV_PRESENT;
451 if (link->state & DEV_CONFIG)
452 netif_device_detach(dev);
454 case CS_EVENT_CARD_INSERTION:
455 link->state |= DEV_PRESENT;
456 com20020_config(link);
458 case CS_EVENT_PM_SUSPEND:
459 link->state |= DEV_SUSPEND;
460 /* Fall through... */
461 case CS_EVENT_RESET_PHYSICAL:
462 if (link->state & DEV_CONFIG) {
464 netif_device_detach(dev);
466 pcmcia_release_configuration(link->handle);
469 case CS_EVENT_PM_RESUME:
470 link->state &= ~DEV_SUSPEND;
471 /* Fall through... */
472 case CS_EVENT_CARD_RESET:
473 if (link->state & DEV_CONFIG) {
474 pcmcia_request_configuration(link->handle, &link->conf);
476 int ioaddr = dev->base_addr;
477 struct arcnet_local *lp = dev->priv;
484 } /* com20020_event */
488 static struct pcmcia_driver com20020_cs_driver = {
489 .owner = THIS_MODULE,
491 .name = "com20020_cs",
493 .attach = com20020_attach,
494 .detach = com20020_detach,
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);