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1da177e4 LT |
1 | /* |
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> | |
1da177e4 LT |
32 | #include <linux/errno.h> |
33 | #include <linux/delay.h> | |
34 | #include <linux/netdevice.h> | |
35 | #include <linux/init.h> | |
36 | #include <linux/arcdevice.h> | |
37 | #include <linux/com20020.h> | |
38 | ||
39 | #include <asm/io.h> | |
40 | ||
41 | #define VERSION "arcnet: COM20020 chipset support (by David Woodhouse et al.)\n" | |
42 | ||
43 | static char *clockrates[] = | |
44 | {"10 Mb/s", "Reserved", "5 Mb/s", | |
45 | "2.5 Mb/s", "1.25Mb/s", "625 Kb/s", "312.5 Kb/s", | |
46 | "156.25 Kb/s", "Reserved", "Reserved", "Reserved"}; | |
47 | ||
48 | static void com20020_command(struct net_device *dev, int command); | |
49 | static int com20020_status(struct net_device *dev); | |
50 | static void com20020_setmask(struct net_device *dev, int mask); | |
51 | static int com20020_reset(struct net_device *dev, int really_reset); | |
52 | static void com20020_copy_to_card(struct net_device *dev, int bufnum, | |
53 | int offset, void *buf, int count); | |
54 | static void com20020_copy_from_card(struct net_device *dev, int bufnum, | |
55 | int offset, void *buf, int count); | |
56 | static void com20020_set_mc_list(struct net_device *dev); | |
57 | static void com20020_close(struct net_device *); | |
58 | ||
59 | static void com20020_copy_from_card(struct net_device *dev, int bufnum, | |
60 | int offset, void *buf, int count) | |
61 | { | |
62 | int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset; | |
63 | ||
64 | /* set up the address register */ | |
65 | outb((ofs >> 8) | RDDATAflag | AUTOINCflag, _ADDR_HI); | |
66 | outb(ofs & 0xff, _ADDR_LO); | |
67 | ||
68 | /* copy the data */ | |
69 | TIME("insb", count, insb(_MEMDATA, buf, count)); | |
70 | } | |
71 | ||
72 | ||
73 | static void com20020_copy_to_card(struct net_device *dev, int bufnum, | |
74 | int offset, void *buf, int count) | |
75 | { | |
76 | int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset; | |
77 | ||
78 | /* set up the address register */ | |
79 | outb((ofs >> 8) | AUTOINCflag, _ADDR_HI); | |
80 | outb(ofs & 0xff, _ADDR_LO); | |
81 | ||
82 | /* copy the data */ | |
83 | TIME("outsb", count, outsb(_MEMDATA, buf, count)); | |
84 | } | |
85 | ||
86 | ||
87 | /* Reset the card and check some basic stuff during the detection stage. */ | |
88 | int com20020_check(struct net_device *dev) | |
89 | { | |
90 | int ioaddr = dev->base_addr, status; | |
454d7c9b | 91 | struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 LT |
92 | |
93 | ARCRESET0; | |
94 | mdelay(RESETtime); | |
95 | ||
96 | lp->setup = lp->clockm ? 0 : (lp->clockp << 1); | |
97 | lp->setup2 = (lp->clockm << 4) | 8; | |
98 | ||
99 | /* CHECK: should we do this for SOHARD cards ? */ | |
100 | /* Enable P1Mode for backplane mode */ | |
101 | lp->setup = lp->setup | P1MODE; | |
102 | ||
103 | SET_SUBADR(SUB_SETUP1); | |
104 | outb(lp->setup, _XREG); | |
105 | ||
52edc17f | 106 | if (lp->clockm != 0) |
1da177e4 LT |
107 | { |
108 | SET_SUBADR(SUB_SETUP2); | |
109 | outb(lp->setup2, _XREG); | |
110 | ||
111 | /* must now write the magic "restart operation" command */ | |
112 | mdelay(1); | |
113 | outb(0x18, _COMMAND); | |
114 | } | |
115 | ||
116 | lp->config = 0x21 | (lp->timeout << 3) | (lp->backplane << 2); | |
117 | /* set node ID to 0x42 (but transmitter is disabled, so it's okay) */ | |
118 | SETCONF; | |
119 | outb(0x42, ioaddr + BUS_ALIGN*7); | |
120 | ||
121 | status = ASTATUS(); | |
122 | ||
123 | if ((status & 0x99) != (NORXflag | TXFREEflag | RESETflag)) { | |
124 | BUGMSG(D_NORMAL, "status invalid (%Xh).\n", status); | |
125 | return -ENODEV; | |
126 | } | |
127 | BUGMSG(D_INIT_REASONS, "status after reset: %X\n", status); | |
128 | ||
129 | /* Enable TX */ | |
130 | outb(0x39, _CONFIG); | |
131 | outb(inb(ioaddr + BUS_ALIGN*8), ioaddr + BUS_ALIGN*7); | |
132 | ||
133 | ACOMMAND(CFLAGScmd | RESETclear | CONFIGclear); | |
134 | ||
135 | status = ASTATUS(); | |
136 | BUGMSG(D_INIT_REASONS, "status after reset acknowledged: %X\n", | |
137 | status); | |
138 | ||
139 | /* Read first location of memory */ | |
140 | outb(0 | RDDATAflag | AUTOINCflag, _ADDR_HI); | |
141 | outb(0, _ADDR_LO); | |
142 | ||
143 | if ((status = inb(_MEMDATA)) != TESTvalue) { | |
144 | BUGMSG(D_NORMAL, "Signature byte not found (%02Xh != D1h).\n", | |
145 | status); | |
146 | return -ENODEV; | |
147 | } | |
148 | return 0; | |
149 | } | |
150 | ||
a1799af4 SH |
151 | const struct net_device_ops com20020_netdev_ops = { |
152 | .ndo_open = arcnet_open, | |
153 | .ndo_stop = arcnet_close, | |
154 | .ndo_start_xmit = arcnet_send_packet, | |
155 | .ndo_tx_timeout = arcnet_timeout, | |
156 | .ndo_set_multicast_list = com20020_set_mc_list, | |
157 | }; | |
158 | ||
1da177e4 LT |
159 | /* Set up the struct net_device associated with this card. Called after |
160 | * probing succeeds. | |
161 | */ | |
162 | int com20020_found(struct net_device *dev, int shared) | |
163 | { | |
164 | struct arcnet_local *lp; | |
165 | int ioaddr = dev->base_addr; | |
166 | ||
167 | /* Initialize the rest of the device structure. */ | |
168 | ||
454d7c9b | 169 | lp = netdev_priv(dev); |
1da177e4 LT |
170 | |
171 | lp->hw.owner = THIS_MODULE; | |
172 | lp->hw.command = com20020_command; | |
173 | lp->hw.status = com20020_status; | |
174 | lp->hw.intmask = com20020_setmask; | |
175 | lp->hw.reset = com20020_reset; | |
176 | lp->hw.copy_to_card = com20020_copy_to_card; | |
177 | lp->hw.copy_from_card = com20020_copy_from_card; | |
178 | lp->hw.close = com20020_close; | |
179 | ||
1da177e4 LT |
180 | if (!dev->dev_addr[0]) |
181 | dev->dev_addr[0] = inb(ioaddr + BUS_ALIGN*8); /* FIXME: do this some other way! */ | |
182 | ||
183 | SET_SUBADR(SUB_SETUP1); | |
184 | outb(lp->setup, _XREG); | |
185 | ||
186 | if (lp->card_flags & ARC_CAN_10MBIT) | |
187 | { | |
188 | SET_SUBADR(SUB_SETUP2); | |
189 | outb(lp->setup2, _XREG); | |
190 | ||
191 | /* must now write the magic "restart operation" command */ | |
192 | mdelay(1); | |
193 | outb(0x18, _COMMAND); | |
194 | } | |
195 | ||
196 | lp->config = 0x20 | (lp->timeout << 3) | (lp->backplane << 2) | 1; | |
197 | /* Default 0x38 + register: Node ID */ | |
198 | SETCONF; | |
199 | outb(dev->dev_addr[0], _XREG); | |
200 | ||
201 | /* reserve the irq */ | |
a0607fd3 | 202 | if (request_irq(dev->irq, arcnet_interrupt, shared, |
1da177e4 LT |
203 | "arcnet (COM20020)", dev)) { |
204 | BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", dev->irq); | |
205 | return -ENODEV; | |
206 | } | |
207 | ||
208 | dev->base_addr = ioaddr; | |
209 | ||
210 | BUGMSG(D_NORMAL, "%s: station %02Xh found at %03lXh, IRQ %d.\n", | |
211 | lp->card_name, dev->dev_addr[0], dev->base_addr, dev->irq); | |
212 | ||
213 | if (lp->backplane) | |
214 | BUGMSG(D_NORMAL, "Using backplane mode.\n"); | |
215 | ||
216 | if (lp->timeout != 3) | |
217 | BUGMSG(D_NORMAL, "Using extended timeout value of %d.\n", lp->timeout); | |
218 | ||
219 | BUGMSG(D_NORMAL, "Using CKP %d - data rate %s.\n", | |
220 | lp->setup >> 1, | |
221 | clockrates[3 - ((lp->setup2 & 0xF0) >> 4) + ((lp->setup & 0x0F) >> 1)]); | |
222 | ||
223 | if (register_netdev(dev)) { | |
224 | free_irq(dev->irq, dev); | |
225 | return -EIO; | |
226 | } | |
227 | return 0; | |
228 | } | |
229 | ||
230 | ||
231 | /* | |
232 | * Do a hardware reset on the card, and set up necessary registers. | |
233 | * | |
234 | * This should be called as little as possible, because it disrupts the | |
235 | * token on the network (causes a RECON) and requires a significant delay. | |
236 | * | |
237 | * However, it does make sure the card is in a defined state. | |
238 | */ | |
239 | static int com20020_reset(struct net_device *dev, int really_reset) | |
240 | { | |
454d7c9b | 241 | struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 LT |
242 | u_int ioaddr = dev->base_addr; |
243 | u_char inbyte; | |
244 | ||
245 | BUGMSG(D_DEBUG, "%s: %d: %s: dev: %p, lp: %p, dev->name: %s\n", | |
b39d66a8 | 246 | __FILE__,__LINE__,__func__,dev,lp,dev->name); |
1da177e4 LT |
247 | BUGMSG(D_INIT, "Resetting %s (status=%02Xh)\n", |
248 | dev->name, ASTATUS()); | |
249 | ||
b39d66a8 | 250 | BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__); |
1da177e4 LT |
251 | lp->config = TXENcfg | (lp->timeout << 3) | (lp->backplane << 2); |
252 | /* power-up defaults */ | |
253 | SETCONF; | |
b39d66a8 | 254 | BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__); |
1da177e4 LT |
255 | |
256 | if (really_reset) { | |
257 | /* reset the card */ | |
258 | ARCRESET; | |
259 | mdelay(RESETtime * 2); /* COM20020 seems to be slower sometimes */ | |
260 | } | |
261 | /* clear flags & end reset */ | |
b39d66a8 | 262 | BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__); |
1da177e4 LT |
263 | ACOMMAND(CFLAGScmd | RESETclear | CONFIGclear); |
264 | ||
265 | /* verify that the ARCnet signature byte is present */ | |
b39d66a8 | 266 | BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__); |
1da177e4 LT |
267 | |
268 | com20020_copy_from_card(dev, 0, 0, &inbyte, 1); | |
b39d66a8 | 269 | BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__); |
1da177e4 | 270 | if (inbyte != TESTvalue) { |
b39d66a8 | 271 | BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__); |
1da177e4 LT |
272 | BUGMSG(D_NORMAL, "reset failed: TESTvalue not present.\n"); |
273 | return 1; | |
274 | } | |
275 | /* enable extended (512-byte) packets */ | |
276 | ACOMMAND(CONFIGcmd | EXTconf); | |
b39d66a8 | 277 | BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__); |
1da177e4 LT |
278 | |
279 | /* done! return success. */ | |
280 | return 0; | |
281 | } | |
282 | ||
283 | ||
284 | static void com20020_setmask(struct net_device *dev, int mask) | |
285 | { | |
286 | u_int ioaddr = dev->base_addr; | |
287 | BUGMSG(D_DURING, "Setting mask to %x at %x\n",mask,ioaddr); | |
288 | AINTMASK(mask); | |
289 | } | |
290 | ||
291 | ||
292 | static void com20020_command(struct net_device *dev, int cmd) | |
293 | { | |
294 | u_int ioaddr = dev->base_addr; | |
295 | ACOMMAND(cmd); | |
296 | } | |
297 | ||
298 | ||
299 | static int com20020_status(struct net_device *dev) | |
300 | { | |
301 | u_int ioaddr = dev->base_addr; | |
302 | ||
303 | return ASTATUS() + (ADIAGSTATUS()<<8); | |
304 | } | |
305 | ||
306 | static void com20020_close(struct net_device *dev) | |
307 | { | |
454d7c9b | 308 | struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 LT |
309 | int ioaddr = dev->base_addr; |
310 | ||
311 | /* disable transmitter */ | |
312 | lp->config &= ~TXENcfg; | |
313 | SETCONF; | |
314 | } | |
315 | ||
316 | /* Set or clear the multicast filter for this adaptor. | |
317 | * num_addrs == -1 Promiscuous mode, receive all packets | |
318 | * num_addrs == 0 Normal mode, clear multicast list | |
319 | * num_addrs > 0 Multicast mode, receive normal and MC packets, and do | |
320 | * best-effort filtering. | |
321 | * FIXME - do multicast stuff, not just promiscuous. | |
322 | */ | |
323 | static void com20020_set_mc_list(struct net_device *dev) | |
324 | { | |
454d7c9b | 325 | struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 LT |
326 | int ioaddr = dev->base_addr; |
327 | ||
328 | if ((dev->flags & IFF_PROMISC) && (dev->flags & IFF_UP)) { /* Enable promiscuous mode */ | |
329 | if (!(lp->setup & PROMISCset)) | |
330 | BUGMSG(D_NORMAL, "Setting promiscuous flag...\n"); | |
331 | SET_SUBADR(SUB_SETUP1); | |
332 | lp->setup |= PROMISCset; | |
333 | outb(lp->setup, _XREG); | |
334 | } else | |
335 | /* Disable promiscuous mode, use normal mode */ | |
336 | { | |
337 | if ((lp->setup & PROMISCset)) | |
338 | BUGMSG(D_NORMAL, "Resetting promiscuous flag...\n"); | |
339 | SET_SUBADR(SUB_SETUP1); | |
340 | lp->setup &= ~PROMISCset; | |
341 | outb(lp->setup, _XREG); | |
342 | } | |
343 | } | |
344 | ||
ace48ffb | 345 | #if defined(CONFIG_ARCNET_COM20020_PCI_MODULE) || \ |
2a10387e RD |
346 | defined(CONFIG_ARCNET_COM20020_ISA_MODULE) || \ |
347 | defined(CONFIG_ARCNET_COM20020_CS_MODULE) | |
1da177e4 LT |
348 | EXPORT_SYMBOL(com20020_check); |
349 | EXPORT_SYMBOL(com20020_found); | |
dd0a251c | 350 | EXPORT_SYMBOL(com20020_netdev_ops); |
ace48ffb | 351 | #endif |
1da177e4 LT |
352 | |
353 | MODULE_LICENSE("GPL"); | |
354 | ||
ace48ffb RD |
355 | #ifdef MODULE |
356 | ||
0ebd1c1d | 357 | static int __init com20020_module_init(void) |
1da177e4 LT |
358 | { |
359 | BUGLVL(D_NORMAL) printk(VERSION); | |
360 | return 0; | |
361 | } | |
362 | ||
0ebd1c1d | 363 | static void __exit com20020_module_exit(void) |
1da177e4 LT |
364 | { |
365 | } | |
0ebd1c1d JS |
366 | module_init(com20020_module_init); |
367 | module_exit(com20020_module_exit); | |
1da177e4 | 368 | #endif /* MODULE */ |