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
 35#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt
 36
 37#include <linux/kernel.h>
 38#include <linux/ptrace.h>
 39#include <linux/slab.h>
 40#include <linux/string.h>
 41#include <linux/timer.h>
 42#include <linux/delay.h>
 43#include <linux/module.h>
 44#include <linux/netdevice.h>
 45#include <linux/io.h>
 46#include <pcmcia/cistpl.h>
 47#include <pcmcia/ds.h>
 48
 49#include "arcdevice.h"
 50#include "com20020.h"
 51
 52static void regdump(struct net_device *dev)
 53{
 54#ifdef DEBUG
 55	int ioaddr = dev->base_addr;
 56	int count;
 57
 58	netdev_dbg(dev, "register dump:\n");
 59	for (count = 0; count < 16; count++) {
 60		if (!(count % 16))
 61			pr_cont("%04X:", ioaddr + count);
 62		pr_cont(" %02X", arcnet_inb(ioaddr, count));
 63	}
 64	pr_cont("\n");
 65
 66	netdev_dbg(dev, "buffer0 dump:\n");
 67	/* set up the address register */
 68	count = 0;
 69	arcnet_outb((count >> 8) | RDDATAflag | AUTOINCflag,
 70		    ioaddr, COM20020_REG_W_ADDR_HI);
 71	arcnet_outb(count & 0xff, ioaddr, COM20020_REG_W_ADDR_LO);
 72
 73	for (count = 0; count < 256 + 32; count++) {
 74		if (!(count % 16))
 75			pr_cont("%04X:", count);
 76
 77		/* copy the data */
 78		pr_cont(" %02X", arcnet_inb(ioaddr, COM20020_REG_RW_MEMDATA));
 79	}
 80	pr_cont("\n");
 81#endif
 82}
 83
 84/*====================================================================*/
 85
 86/* Parameters that can be set with 'insmod' */
 87
 88static int node;
 89static int timeout = 3;
 90static int backplane;
 91static int clockp;
 92static int clockm;
 93
 94module_param(node, int, 0);
 95module_param(timeout, int, 0);
 96module_param(backplane, int, 0);
 97module_param(clockp, int, 0);
 98module_param(clockm, int, 0);
 99
100MODULE_DESCRIPTION("ARCnet COM20020 chipset PCMCIA driver");
101MODULE_LICENSE("GPL");
102
103/*====================================================================*/
104
105static int com20020_config(struct pcmcia_device *link);
106static void com20020_release(struct pcmcia_device *link);
107
108static void com20020_detach(struct pcmcia_device *p_dev);
109
110/*====================================================================*/
111
112static int com20020_probe(struct pcmcia_device *p_dev)
113{
114	struct com20020_dev *info;
115	struct net_device *dev;
116	struct arcnet_local *lp;
117	int ret = -ENOMEM;
118
119	dev_dbg(&p_dev->dev, "com20020_attach()\n");
120
121	/* Create new network device */
122	info = kzalloc(sizeof(*info), GFP_KERNEL);
123	if (!info)
124		goto fail_alloc_info;
125
126	dev = alloc_arcdev("");
127	if (!dev)
128		goto fail_alloc_dev;
129
130	lp = netdev_priv(dev);
131	lp->timeout = timeout;
132	lp->backplane = backplane;
133	lp->clockp = clockp;
134	lp->clockm = clockm & 3;
135	lp->hw.owner = THIS_MODULE;
136
137	/* fill in our module parameters as defaults */
138	arcnet_set_addr(dev, node);
139
140	p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
141	p_dev->resource[0]->end = 16;
142	p_dev->config_flags |= CONF_ENABLE_IRQ;
143
144	info->dev = dev;
145	p_dev->priv = info;
146
147	ret = com20020_config(p_dev);
148	if (ret)
149		goto fail_config;
150
151	return 0;
152
153fail_config:
154	free_arcdev(dev);
155fail_alloc_dev:
156	kfree(info);
157fail_alloc_info:
158	return ret;
159} /* com20020_attach */
160
161static void com20020_detach(struct pcmcia_device *link)
162{
163	struct com20020_dev *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	/* this is necessary because we register our IRQ separately
175	 * from card services.
176	 */
177	if (dev->irq)
178		free_irq(dev->irq, dev);
179
180	com20020_release(link);
181
182	/* Unlink device structure, free bits */
183	dev_dbg(&link->dev, "unlinking...\n");
184	if (link->priv) {
185		dev = info->dev;
186		if (dev) {
187			dev_dbg(&link->dev, "kfree...\n");
188			free_arcdev(dev);
189		}
190		dev_dbg(&link->dev, "kfree2...\n");
191		kfree(info);
192	}
193
194} /* com20020_detach */
195
196static int com20020_config(struct pcmcia_device *link)
197{
198	struct arcnet_local *lp;
199	struct com20020_dev *info;
200	struct net_device *dev;
201	int i, ret;
202	int ioaddr;
203
204	info = link->priv;
205	dev = info->dev;
206
207	dev_dbg(&link->dev, "config...\n");
208
209	dev_dbg(&link->dev, "com20020_config\n");
210
211	dev_dbg(&link->dev, "baseport1 is %Xh\n",
212		(unsigned int)link->resource[0]->start);
213
214	i = -ENODEV;
215	link->io_lines = 16;
216
217	if (!link->resource[0]->start) {
218		for (ioaddr = 0x100; ioaddr < 0x400; ioaddr += 0x10) {
219			link->resource[0]->start = ioaddr;
220			i = pcmcia_request_io(link);
221			if (i == 0)
222				break;
223		}
224	} else {
225		i = pcmcia_request_io(link);
226	}
227
228	if (i != 0) {
229		dev_dbg(&link->dev, "requestIO failed totally!\n");
230		goto failed;
231	}
232
233	ioaddr = dev->base_addr = link->resource[0]->start;
234	dev_dbg(&link->dev, "got ioaddr %Xh\n", ioaddr);
235
236	dev_dbg(&link->dev, "request IRQ %d\n",
237		link->irq);
238	if (!link->irq) {
239		dev_dbg(&link->dev, "requestIRQ failed totally!\n");
240		goto failed;
241	}
242
243	dev->irq = link->irq;
244
245	ret = pcmcia_enable_device(link);
246	if (ret)
247		goto failed;
248
249	if (com20020_check(dev)) {
250		regdump(dev);
251		goto failed;
252	}
253
254	lp = netdev_priv(dev);
255	lp->card_name = "PCMCIA COM20020";
256	lp->card_flags = ARC_CAN_10MBIT; /* pretend all of them can 10Mbit */
257
258	SET_NETDEV_DEV(dev, &link->dev);
259
260	i = com20020_found(dev, 0);	/* calls register_netdev */
261
262	if (i != 0) {
263		dev_notice(&link->dev,
264			   "com20020_found() failed\n");
265		goto failed;
266	}
267
268	netdev_dbg(dev, "port %#3lx, irq %d\n",
269		   dev->base_addr, dev->irq);
270	return 0;
271
272failed:
273	dev_dbg(&link->dev, "com20020_config failed...\n");
274	com20020_release(link);
275	return -ENODEV;
276} /* com20020_config */
277
278static void com20020_release(struct pcmcia_device *link)
279{
280	dev_dbg(&link->dev, "com20020_release\n");
281	pcmcia_disable_device(link);
282}
283
284static int com20020_suspend(struct pcmcia_device *link)
285{
286	struct com20020_dev *info = link->priv;
287	struct net_device *dev = info->dev;
288
289	if (link->open)
290		netif_device_detach(dev);
291
292	return 0;
293}
294
295static int com20020_resume(struct pcmcia_device *link)
296{
297	struct com20020_dev *info = link->priv;
298	struct net_device *dev = info->dev;
299
300	if (link->open) {
301		int ioaddr = dev->base_addr;
302		struct arcnet_local *lp = netdev_priv(dev);
303
304		arcnet_outb(lp->config | 0x80, ioaddr, COM20020_REG_W_CONFIG);
305		udelay(5);
306		arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
307	}
308
309	return 0;
310}
311
312static const struct pcmcia_device_id com20020_ids[] = {
313	PCMCIA_DEVICE_PROD_ID12("Contemporary Control Systems, Inc.",
314				"PCM20 Arcnet Adapter", 0x59991666, 0x95dfffaf),
315	PCMCIA_DEVICE_PROD_ID12("SoHard AG",
316				"SH ARC PCMCIA", 0xf8991729, 0x69dff0c7),
317	PCMCIA_DEVICE_NULL
318};
319MODULE_DEVICE_TABLE(pcmcia, com20020_ids);
320
321static struct pcmcia_driver com20020_cs_driver = {
322	.owner		= THIS_MODULE,
323	.name		= "com20020_cs",
324	.probe		= com20020_probe,
325	.remove		= com20020_detach,
326	.id_table	= com20020_ids,
327	.suspend	= com20020_suspend,
328	.resume		= com20020_resume,
329};
330module_pcmcia_driver(com20020_cs_driver);