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
regdump(struct net_device * dev)52 static 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
88 static int node;
89 static int timeout = 3;
90 static int backplane;
91 static int clockp;
92 static int clockm;
93
94 module_param(node, int, 0);
95 module_param(timeout, int, 0);
96 module_param(backplane, int, 0);
97 module_param(clockp, int, 0);
98 module_param(clockm, int, 0);
99
100 MODULE_LICENSE("GPL");
101
102 /*====================================================================*/
103
104 static int com20020_config(struct pcmcia_device *link);
105 static void com20020_release(struct pcmcia_device *link);
106
107 static void com20020_detach(struct pcmcia_device *p_dev);
108
109 /*====================================================================*/
110
com20020_probe(struct pcmcia_device * p_dev)111 static 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
117 dev_dbg(&p_dev->dev, "com20020_attach()\n");
118
119 /* Create new network device */
120 info = kzalloc(sizeof(*info), GFP_KERNEL);
121 if (!info)
122 goto fail_alloc_info;
123
124 dev = alloc_arcdev("");
125 if (!dev)
126 goto fail_alloc_dev;
127
128 lp = netdev_priv(dev);
129 lp->timeout = timeout;
130 lp->backplane = backplane;
131 lp->clockp = clockp;
132 lp->clockm = clockm & 3;
133 lp->hw.owner = THIS_MODULE;
134
135 /* fill in our module parameters as defaults */
136 arcnet_set_addr(dev, node);
137
138 p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
139 p_dev->resource[0]->end = 16;
140 p_dev->config_flags |= CONF_ENABLE_IRQ;
141
142 info->dev = dev;
143 p_dev->priv = info;
144
145 return com20020_config(p_dev);
146
147 fail_alloc_dev:
148 kfree(info);
149 fail_alloc_info:
150 return -ENOMEM;
151 } /* com20020_attach */
152
com20020_detach(struct pcmcia_device * link)153 static void com20020_detach(struct pcmcia_device *link)
154 {
155 struct com20020_dev *info = link->priv;
156 struct net_device *dev = info->dev;
157
158 dev_dbg(&link->dev, "detach...\n");
159
160 dev_dbg(&link->dev, "com20020_detach\n");
161
162 dev_dbg(&link->dev, "unregister...\n");
163
164 unregister_netdev(dev);
165
166 /* this is necessary because we register our IRQ separately
167 * from card services.
168 */
169 if (dev->irq)
170 free_irq(dev->irq, dev);
171
172 com20020_release(link);
173
174 /* Unlink device structure, free bits */
175 dev_dbg(&link->dev, "unlinking...\n");
176 if (link->priv) {
177 dev = info->dev;
178 if (dev) {
179 dev_dbg(&link->dev, "kfree...\n");
180 free_arcdev(dev);
181 }
182 dev_dbg(&link->dev, "kfree2...\n");
183 kfree(info);
184 }
185
186 } /* com20020_detach */
187
com20020_config(struct pcmcia_device * link)188 static int com20020_config(struct pcmcia_device *link)
189 {
190 struct arcnet_local *lp;
191 struct com20020_dev *info;
192 struct net_device *dev;
193 int i, ret;
194 int ioaddr;
195
196 info = link->priv;
197 dev = info->dev;
198
199 dev_dbg(&link->dev, "config...\n");
200
201 dev_dbg(&link->dev, "com20020_config\n");
202
203 dev_dbg(&link->dev, "baseport1 is %Xh\n",
204 (unsigned int)link->resource[0]->start);
205
206 i = -ENODEV;
207 link->io_lines = 16;
208
209 if (!link->resource[0]->start) {
210 for (ioaddr = 0x100; ioaddr < 0x400; ioaddr += 0x10) {
211 link->resource[0]->start = ioaddr;
212 i = pcmcia_request_io(link);
213 if (i == 0)
214 break;
215 }
216 } else {
217 i = pcmcia_request_io(link);
218 }
219
220 if (i != 0) {
221 dev_dbg(&link->dev, "requestIO failed totally!\n");
222 goto failed;
223 }
224
225 ioaddr = dev->base_addr = link->resource[0]->start;
226 dev_dbg(&link->dev, "got ioaddr %Xh\n", ioaddr);
227
228 dev_dbg(&link->dev, "request IRQ %d\n",
229 link->irq);
230 if (!link->irq) {
231 dev_dbg(&link->dev, "requestIRQ failed totally!\n");
232 goto failed;
233 }
234
235 dev->irq = link->irq;
236
237 ret = pcmcia_enable_device(link);
238 if (ret)
239 goto failed;
240
241 if (com20020_check(dev)) {
242 regdump(dev);
243 goto failed;
244 }
245
246 lp = netdev_priv(dev);
247 lp->card_name = "PCMCIA COM20020";
248 lp->card_flags = ARC_CAN_10MBIT; /* pretend all of them can 10Mbit */
249
250 SET_NETDEV_DEV(dev, &link->dev);
251
252 i = com20020_found(dev, 0); /* calls register_netdev */
253
254 if (i != 0) {
255 dev_notice(&link->dev,
256 "com20020_found() failed\n");
257 goto failed;
258 }
259
260 netdev_dbg(dev, "port %#3lx, irq %d\n",
261 dev->base_addr, dev->irq);
262 return 0;
263
264 failed:
265 dev_dbg(&link->dev, "com20020_config failed...\n");
266 com20020_release(link);
267 return -ENODEV;
268 } /* com20020_config */
269
com20020_release(struct pcmcia_device * link)270 static void com20020_release(struct pcmcia_device *link)
271 {
272 dev_dbg(&link->dev, "com20020_release\n");
273 pcmcia_disable_device(link);
274 }
275
com20020_suspend(struct pcmcia_device * link)276 static int com20020_suspend(struct pcmcia_device *link)
277 {
278 struct com20020_dev *info = link->priv;
279 struct net_device *dev = info->dev;
280
281 if (link->open)
282 netif_device_detach(dev);
283
284 return 0;
285 }
286
com20020_resume(struct pcmcia_device * link)287 static int com20020_resume(struct pcmcia_device *link)
288 {
289 struct com20020_dev *info = link->priv;
290 struct net_device *dev = info->dev;
291
292 if (link->open) {
293 int ioaddr = dev->base_addr;
294 struct arcnet_local *lp = netdev_priv(dev);
295
296 arcnet_outb(lp->config | 0x80, ioaddr, COM20020_REG_W_CONFIG);
297 udelay(5);
298 arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
299 }
300
301 return 0;
302 }
303
304 static const struct pcmcia_device_id com20020_ids[] = {
305 PCMCIA_DEVICE_PROD_ID12("Contemporary Control Systems, Inc.",
306 "PCM20 Arcnet Adapter", 0x59991666, 0x95dfffaf),
307 PCMCIA_DEVICE_PROD_ID12("SoHard AG",
308 "SH ARC PCMCIA", 0xf8991729, 0x69dff0c7),
309 PCMCIA_DEVICE_NULL
310 };
311 MODULE_DEVICE_TABLE(pcmcia, com20020_ids);
312
313 static struct pcmcia_driver com20020_cs_driver = {
314 .owner = THIS_MODULE,
315 .name = "com20020_cs",
316 .probe = com20020_probe,
317 .remove = com20020_detach,
318 .id_table = com20020_ids,
319 .suspend = com20020_suspend,
320 .resume = com20020_resume,
321 };
322 module_pcmcia_driver(com20020_cs_driver);
323