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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Linux ARCnet driver - COM20020 chipset support
3 *
4 * Written 1997 by David Woodhouse.
5 * Written 1994-1999 by Avery Pennarun.
6 * Written 1999 by Martin Mares <mj@ucw.cz>.
7 * Derived from skeleton.c by Donald Becker.
8 *
9 * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
10 * for sponsoring the further development of this driver.
11 *
12 * **********************
13 *
14 * The original copyright of skeleton.c was as follows:
15 *
16 * skeleton.c Written 1993 by Donald Becker.
17 * Copyright 1993 United States Government as represented by the
18 * Director, National Security Agency. This software may only be used
19 * and distributed according to the terms of the GNU General Public License as
20 * modified by SRC, incorporated herein by reference.
21 *
22 * **********************
23 *
24 * For more details, see drivers/net/arcnet.c
25 *
26 * **********************
27 */
28#include <linux/module.h>
29#include <linux/kernel.h>
30#include <linux/types.h>
31#include <linux/ioport.h>
32#include <linux/slab.h>
33#include <linux/errno.h>
34#include <linux/delay.h>
35#include <linux/netdevice.h>
36#include <linux/init.h>
37#include <linux/arcdevice.h>
38#include <linux/com20020.h>
39
40#include <asm/io.h>
41
42#define VERSION "arcnet: COM20020 chipset support (by David Woodhouse et al.)\n"
43
44static char *clockrates[] =
45{"10 Mb/s", "Reserved", "5 Mb/s",
46 "2.5 Mb/s", "1.25Mb/s", "625 Kb/s", "312.5 Kb/s",
47 "156.25 Kb/s", "Reserved", "Reserved", "Reserved"};
48
49static void com20020_command(struct net_device *dev, int command);
50static int com20020_status(struct net_device *dev);
51static void com20020_setmask(struct net_device *dev, int mask);
52static int com20020_reset(struct net_device *dev, int really_reset);
53static void com20020_copy_to_card(struct net_device *dev, int bufnum,
54 int offset, void *buf, int count);
55static void com20020_copy_from_card(struct net_device *dev, int bufnum,
56 int offset, void *buf, int count);
57static void com20020_set_mc_list(struct net_device *dev);
58static void com20020_close(struct net_device *);
59
60static void com20020_copy_from_card(struct net_device *dev, int bufnum,
61 int offset, void *buf, int count)
62{
63 int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset;
64
65 /* set up the address register */
66 outb((ofs >> 8) | RDDATAflag | AUTOINCflag, _ADDR_HI);
67 outb(ofs & 0xff, _ADDR_LO);
68
69 /* copy the data */
70 TIME("insb", count, insb(_MEMDATA, buf, count));
71}
72
73
74static void com20020_copy_to_card(struct net_device *dev, int bufnum,
75 int offset, void *buf, int count)
76{
77 int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset;
78
79 /* set up the address register */
80 outb((ofs >> 8) | AUTOINCflag, _ADDR_HI);
81 outb(ofs & 0xff, _ADDR_LO);
82
83 /* copy the data */
84 TIME("outsb", count, outsb(_MEMDATA, buf, count));
85}
86
87
88/* Reset the card and check some basic stuff during the detection stage. */
89int com20020_check(struct net_device *dev)
90{
91 int ioaddr = dev->base_addr, status;
92 struct arcnet_local *lp = dev->priv;
93
94 ARCRESET0;
95 mdelay(RESETtime);
96
97 lp->setup = lp->clockm ? 0 : (lp->clockp << 1);
98 lp->setup2 = (lp->clockm << 4) | 8;
99
100 /* CHECK: should we do this for SOHARD cards ? */
101 /* Enable P1Mode for backplane mode */
102 lp->setup = lp->setup | P1MODE;
103
104 SET_SUBADR(SUB_SETUP1);
105 outb(lp->setup, _XREG);
106
Jeff Morrow52edc172007-02-16 01:42:27 -0800107 if (lp->clockm != 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 {
109 SET_SUBADR(SUB_SETUP2);
110 outb(lp->setup2, _XREG);
111
112 /* must now write the magic "restart operation" command */
113 mdelay(1);
114 outb(0x18, _COMMAND);
115 }
116
117 lp->config = 0x21 | (lp->timeout << 3) | (lp->backplane << 2);
118 /* set node ID to 0x42 (but transmitter is disabled, so it's okay) */
119 SETCONF;
120 outb(0x42, ioaddr + BUS_ALIGN*7);
121
122 status = ASTATUS();
123
124 if ((status & 0x99) != (NORXflag | TXFREEflag | RESETflag)) {
125 BUGMSG(D_NORMAL, "status invalid (%Xh).\n", status);
126 return -ENODEV;
127 }
128 BUGMSG(D_INIT_REASONS, "status after reset: %X\n", status);
129
130 /* Enable TX */
131 outb(0x39, _CONFIG);
132 outb(inb(ioaddr + BUS_ALIGN*8), ioaddr + BUS_ALIGN*7);
133
134 ACOMMAND(CFLAGScmd | RESETclear | CONFIGclear);
135
136 status = ASTATUS();
137 BUGMSG(D_INIT_REASONS, "status after reset acknowledged: %X\n",
138 status);
139
140 /* Read first location of memory */
141 outb(0 | RDDATAflag | AUTOINCflag, _ADDR_HI);
142 outb(0, _ADDR_LO);
143
144 if ((status = inb(_MEMDATA)) != TESTvalue) {
145 BUGMSG(D_NORMAL, "Signature byte not found (%02Xh != D1h).\n",
146 status);
147 return -ENODEV;
148 }
149 return 0;
150}
151
152/* Set up the struct net_device associated with this card. Called after
153 * probing succeeds.
154 */
155int com20020_found(struct net_device *dev, int shared)
156{
157 struct arcnet_local *lp;
158 int ioaddr = dev->base_addr;
159
160 /* Initialize the rest of the device structure. */
161
162 lp = dev->priv;
163
164 lp->hw.owner = THIS_MODULE;
165 lp->hw.command = com20020_command;
166 lp->hw.status = com20020_status;
167 lp->hw.intmask = com20020_setmask;
168 lp->hw.reset = com20020_reset;
169 lp->hw.copy_to_card = com20020_copy_to_card;
170 lp->hw.copy_from_card = com20020_copy_from_card;
171 lp->hw.close = com20020_close;
172
173 dev->set_multicast_list = com20020_set_mc_list;
174
175 if (!dev->dev_addr[0])
176 dev->dev_addr[0] = inb(ioaddr + BUS_ALIGN*8); /* FIXME: do this some other way! */
177
178 SET_SUBADR(SUB_SETUP1);
179 outb(lp->setup, _XREG);
180
181 if (lp->card_flags & ARC_CAN_10MBIT)
182 {
183 SET_SUBADR(SUB_SETUP2);
184 outb(lp->setup2, _XREG);
185
186 /* must now write the magic "restart operation" command */
187 mdelay(1);
188 outb(0x18, _COMMAND);
189 }
190
191 lp->config = 0x20 | (lp->timeout << 3) | (lp->backplane << 2) | 1;
192 /* Default 0x38 + register: Node ID */
193 SETCONF;
194 outb(dev->dev_addr[0], _XREG);
195
196 /* reserve the irq */
197 if (request_irq(dev->irq, &arcnet_interrupt, shared,
198 "arcnet (COM20020)", dev)) {
199 BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", dev->irq);
200 return -ENODEV;
201 }
202
203 dev->base_addr = ioaddr;
204
205 BUGMSG(D_NORMAL, "%s: station %02Xh found at %03lXh, IRQ %d.\n",
206 lp->card_name, dev->dev_addr[0], dev->base_addr, dev->irq);
207
208 if (lp->backplane)
209 BUGMSG(D_NORMAL, "Using backplane mode.\n");
210
211 if (lp->timeout != 3)
212 BUGMSG(D_NORMAL, "Using extended timeout value of %d.\n", lp->timeout);
213
214 BUGMSG(D_NORMAL, "Using CKP %d - data rate %s.\n",
215 lp->setup >> 1,
216 clockrates[3 - ((lp->setup2 & 0xF0) >> 4) + ((lp->setup & 0x0F) >> 1)]);
217
218 if (register_netdev(dev)) {
219 free_irq(dev->irq, dev);
220 return -EIO;
221 }
222 return 0;
223}
224
225
226/*
227 * Do a hardware reset on the card, and set up necessary registers.
228 *
229 * This should be called as little as possible, because it disrupts the
230 * token on the network (causes a RECON) and requires a significant delay.
231 *
232 * However, it does make sure the card is in a defined state.
233 */
234static int com20020_reset(struct net_device *dev, int really_reset)
235{
236 struct arcnet_local *lp = dev->priv;
237 u_int ioaddr = dev->base_addr;
238 u_char inbyte;
239
240 BUGMSG(D_DEBUG, "%s: %d: %s: dev: %p, lp: %p, dev->name: %s\n",
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700241 __FILE__,__LINE__,__func__,dev,lp,dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 BUGMSG(D_INIT, "Resetting %s (status=%02Xh)\n",
243 dev->name, ASTATUS());
244
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700245 BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 lp->config = TXENcfg | (lp->timeout << 3) | (lp->backplane << 2);
247 /* power-up defaults */
248 SETCONF;
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700249 BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250
251 if (really_reset) {
252 /* reset the card */
253 ARCRESET;
254 mdelay(RESETtime * 2); /* COM20020 seems to be slower sometimes */
255 }
256 /* clear flags & end reset */
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700257 BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 ACOMMAND(CFLAGScmd | RESETclear | CONFIGclear);
259
260 /* verify that the ARCnet signature byte is present */
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700261 BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262
263 com20020_copy_from_card(dev, 0, 0, &inbyte, 1);
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700264 BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 if (inbyte != TESTvalue) {
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700266 BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 BUGMSG(D_NORMAL, "reset failed: TESTvalue not present.\n");
268 return 1;
269 }
270 /* enable extended (512-byte) packets */
271 ACOMMAND(CONFIGcmd | EXTconf);
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700272 BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273
274 /* done! return success. */
275 return 0;
276}
277
278
279static void com20020_setmask(struct net_device *dev, int mask)
280{
281 u_int ioaddr = dev->base_addr;
282 BUGMSG(D_DURING, "Setting mask to %x at %x\n",mask,ioaddr);
283 AINTMASK(mask);
284}
285
286
287static void com20020_command(struct net_device *dev, int cmd)
288{
289 u_int ioaddr = dev->base_addr;
290 ACOMMAND(cmd);
291}
292
293
294static int com20020_status(struct net_device *dev)
295{
296 u_int ioaddr = dev->base_addr;
297
298 return ASTATUS() + (ADIAGSTATUS()<<8);
299}
300
301static void com20020_close(struct net_device *dev)
302{
303 struct arcnet_local *lp = dev->priv;
304 int ioaddr = dev->base_addr;
305
306 /* disable transmitter */
307 lp->config &= ~TXENcfg;
308 SETCONF;
309}
310
311/* Set or clear the multicast filter for this adaptor.
312 * num_addrs == -1 Promiscuous mode, receive all packets
313 * num_addrs == 0 Normal mode, clear multicast list
314 * num_addrs > 0 Multicast mode, receive normal and MC packets, and do
315 * best-effort filtering.
316 * FIXME - do multicast stuff, not just promiscuous.
317 */
318static void com20020_set_mc_list(struct net_device *dev)
319{
320 struct arcnet_local *lp = dev->priv;
321 int ioaddr = dev->base_addr;
322
323 if ((dev->flags & IFF_PROMISC) && (dev->flags & IFF_UP)) { /* Enable promiscuous mode */
324 if (!(lp->setup & PROMISCset))
325 BUGMSG(D_NORMAL, "Setting promiscuous flag...\n");
326 SET_SUBADR(SUB_SETUP1);
327 lp->setup |= PROMISCset;
328 outb(lp->setup, _XREG);
329 } else
330 /* Disable promiscuous mode, use normal mode */
331 {
332 if ((lp->setup & PROMISCset))
333 BUGMSG(D_NORMAL, "Resetting promiscuous flag...\n");
334 SET_SUBADR(SUB_SETUP1);
335 lp->setup &= ~PROMISCset;
336 outb(lp->setup, _XREG);
337 }
338}
339
Randy Dunlapace48ff2006-11-08 19:51:03 -0800340#if defined(CONFIG_ARCNET_COM20020_PCI_MODULE) || \
Randy Dunlap2a103872007-02-12 00:52:22 -0800341 defined(CONFIG_ARCNET_COM20020_ISA_MODULE) || \
342 defined(CONFIG_ARCNET_COM20020_CS_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343EXPORT_SYMBOL(com20020_check);
344EXPORT_SYMBOL(com20020_found);
Randy Dunlapace48ff2006-11-08 19:51:03 -0800345#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346
347MODULE_LICENSE("GPL");
348
Randy Dunlapace48ff2006-11-08 19:51:03 -0800349#ifdef MODULE
350
Jon Schindler0ebd1c12008-02-28 01:31:08 -0600351static int __init com20020_module_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352{
353 BUGLVL(D_NORMAL) printk(VERSION);
354 return 0;
355}
356
Jon Schindler0ebd1c12008-02-28 01:31:08 -0600357static void __exit com20020_module_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358{
359}
Jon Schindler0ebd1c12008-02-28 01:31:08 -0600360module_init(com20020_module_init);
361module_exit(com20020_module_exit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362#endif /* MODULE */