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(size: sizeof(*info), GFP_KERNEL);
123 if (!info)
124 goto fail_alloc_info;
125
126 dev = alloc_arcdev(name: "");
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, addr: 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(link: 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(objp: 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(objp: 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(p_dev: link);
221 if (i == 0)
222 break;
223 }
224 } else {
225 i = pcmcia_request_io(p_dev: 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(p_dev: 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, shared: 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(p_dev: 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);
331

source code of linux/drivers/net/arcnet/com20020_cs.c