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_LICENSE("GPL");
101
102/*====================================================================*/
103
104static int com20020_config(struct pcmcia_device *link);
105static void com20020_release(struct pcmcia_device *link);
106
107static void com20020_detach(struct pcmcia_device *p_dev);
108
109/*====================================================================*/
110
111static int com20020_probe(struct pcmcia_device *p_dev)
112{
113 struct com20020_dev *info;
114 struct net_device *dev;
115 struct arcnet_local *lp;
116 int ret = -ENOMEM;
117
118 dev_dbg(&p_dev->dev, "com20020_attach()\n");
119
120 /* Create new network device */
121 info = kzalloc(size: sizeof(*info), GFP_KERNEL);
122 if (!info)
123 goto fail_alloc_info;
124
125 dev = alloc_arcdev(name: "");
126 if (!dev)
127 goto fail_alloc_dev;
128
129 lp = netdev_priv(dev);
130 lp->timeout = timeout;
131 lp->backplane = backplane;
132 lp->clockp = clockp;
133 lp->clockm = clockm & 3;
134 lp->hw.owner = THIS_MODULE;
135
136 /* fill in our module parameters as defaults */
137 arcnet_set_addr(dev, addr: node);
138
139 p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
140 p_dev->resource[0]->end = 16;
141 p_dev->config_flags |= CONF_ENABLE_IRQ;
142
143 info->dev = dev;
144 p_dev->priv = info;
145
146 ret = com20020_config(link: p_dev);
147 if (ret)
148 goto fail_config;
149
150 return 0;
151
152fail_config:
153 free_arcdev(dev);
154fail_alloc_dev:
155 kfree(objp: info);
156fail_alloc_info:
157 return ret;
158} /* com20020_attach */
159
160static void com20020_detach(struct pcmcia_device *link)
161{
162 struct com20020_dev *info = link->priv;
163 struct net_device *dev = info->dev;
164
165 dev_dbg(&link->dev, "detach...\n");
166
167 dev_dbg(&link->dev, "com20020_detach\n");
168
169 dev_dbg(&link->dev, "unregister...\n");
170
171 unregister_netdev(dev);
172
173 /* this is necessary because we register our IRQ separately
174 * from card services.
175 */
176 if (dev->irq)
177 free_irq(dev->irq, dev);
178
179 com20020_release(link);
180
181 /* Unlink device structure, free bits */
182 dev_dbg(&link->dev, "unlinking...\n");
183 if (link->priv) {
184 dev = info->dev;
185 if (dev) {
186 dev_dbg(&link->dev, "kfree...\n");
187 free_arcdev(dev);
188 }
189 dev_dbg(&link->dev, "kfree2...\n");
190 kfree(objp: info);
191 }
192
193} /* com20020_detach */
194
195static int com20020_config(struct pcmcia_device *link)
196{
197 struct arcnet_local *lp;
198 struct com20020_dev *info;
199 struct net_device *dev;
200 int i, ret;
201 int ioaddr;
202
203 info = link->priv;
204 dev = info->dev;
205
206 dev_dbg(&link->dev, "config...\n");
207
208 dev_dbg(&link->dev, "com20020_config\n");
209
210 dev_dbg(&link->dev, "baseport1 is %Xh\n",
211 (unsigned int)link->resource[0]->start);
212
213 i = -ENODEV;
214 link->io_lines = 16;
215
216 if (!link->resource[0]->start) {
217 for (ioaddr = 0x100; ioaddr < 0x400; ioaddr += 0x10) {
218 link->resource[0]->start = ioaddr;
219 i = pcmcia_request_io(p_dev: link);
220 if (i == 0)
221 break;
222 }
223 } else {
224 i = pcmcia_request_io(p_dev: link);
225 }
226
227 if (i != 0) {
228 dev_dbg(&link->dev, "requestIO failed totally!\n");
229 goto failed;
230 }
231
232 ioaddr = dev->base_addr = link->resource[0]->start;
233 dev_dbg(&link->dev, "got ioaddr %Xh\n", ioaddr);
234
235 dev_dbg(&link->dev, "request IRQ %d\n",
236 link->irq);
237 if (!link->irq) {
238 dev_dbg(&link->dev, "requestIRQ failed totally!\n");
239 goto failed;
240 }
241
242 dev->irq = link->irq;
243
244 ret = pcmcia_enable_device(p_dev: link);
245 if (ret)
246 goto failed;
247
248 if (com20020_check(dev)) {
249 regdump(dev);
250 goto failed;
251 }
252
253 lp = netdev_priv(dev);
254 lp->card_name = "PCMCIA COM20020";
255 lp->card_flags = ARC_CAN_10MBIT; /* pretend all of them can 10Mbit */
256
257 SET_NETDEV_DEV(dev, &link->dev);
258
259 i = com20020_found(dev, shared: 0); /* calls register_netdev */
260
261 if (i != 0) {
262 dev_notice(&link->dev,
263 "com20020_found() failed\n");
264 goto failed;
265 }
266
267 netdev_dbg(dev, "port %#3lx, irq %d\n",
268 dev->base_addr, dev->irq);
269 return 0;
270
271failed:
272 dev_dbg(&link->dev, "com20020_config failed...\n");
273 com20020_release(link);
274 return -ENODEV;
275} /* com20020_config */
276
277static void com20020_release(struct pcmcia_device *link)
278{
279 dev_dbg(&link->dev, "com20020_release\n");
280 pcmcia_disable_device(p_dev: link);
281}
282
283static int com20020_suspend(struct pcmcia_device *link)
284{
285 struct com20020_dev *info = link->priv;
286 struct net_device *dev = info->dev;
287
288 if (link->open)
289 netif_device_detach(dev);
290
291 return 0;
292}
293
294static int com20020_resume(struct pcmcia_device *link)
295{
296 struct com20020_dev *info = link->priv;
297 struct net_device *dev = info->dev;
298
299 if (link->open) {
300 int ioaddr = dev->base_addr;
301 struct arcnet_local *lp = netdev_priv(dev);
302
303 arcnet_outb(lp->config | 0x80, ioaddr, COM20020_REG_W_CONFIG);
304 udelay(5);
305 arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
306 }
307
308 return 0;
309}
310
311static const struct pcmcia_device_id com20020_ids[] = {
312 PCMCIA_DEVICE_PROD_ID12("Contemporary Control Systems, Inc.",
313 "PCM20 Arcnet Adapter", 0x59991666, 0x95dfffaf),
314 PCMCIA_DEVICE_PROD_ID12("SoHard AG",
315 "SH ARC PCMCIA", 0xf8991729, 0x69dff0c7),
316 PCMCIA_DEVICE_NULL
317};
318MODULE_DEVICE_TABLE(pcmcia, com20020_ids);
319
320static struct pcmcia_driver com20020_cs_driver = {
321 .owner = THIS_MODULE,
322 .name = "com20020_cs",
323 .probe = com20020_probe,
324 .remove = com20020_detach,
325 .id_table = com20020_ids,
326 .suspend = com20020_suspend,
327 .resume = com20020_resume,
328};
329module_pcmcia_driver(com20020_cs_driver);
330

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