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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> | |
a6b7a407 | 36 | #include <linux/interrupt.h> |
1da177e4 LT |
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 | ||
44 | static 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 | ||
49 | static void com20020_command(struct net_device *dev, int command); | |
50 | static int com20020_status(struct net_device *dev); | |
51 | static void com20020_setmask(struct net_device *dev, int mask); | |
52 | static int com20020_reset(struct net_device *dev, int really_reset); | |
53 | static void com20020_copy_to_card(struct net_device *dev, int bufnum, | |
54 | int offset, void *buf, int count); | |
55 | static void com20020_copy_from_card(struct net_device *dev, int bufnum, | |
56 | int offset, void *buf, int count); | |
57 | static void com20020_set_mc_list(struct net_device *dev); | |
58 | static void com20020_close(struct net_device *); | |
59 | ||
60 | static 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 | ||
74 | static 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. */ | |
89 | int com20020_check(struct net_device *dev) | |
90 | { | |
91 | int ioaddr = dev->base_addr, status; | |
454d7c9b | 92 | struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 LT |
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 | ||
52edc17f | 107 | if (lp->clockm != 0) |
1da177e4 LT |
108 | { |
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 | ||
a1799af4 SH |
152 | const struct net_device_ops com20020_netdev_ops = { |
153 | .ndo_open = arcnet_open, | |
154 | .ndo_stop = arcnet_close, | |
155 | .ndo_start_xmit = arcnet_send_packet, | |
156 | .ndo_tx_timeout = arcnet_timeout, | |
afc4b13d | 157 | .ndo_set_rx_mode = com20020_set_mc_list, |
a1799af4 SH |
158 | }; |
159 | ||
1da177e4 LT |
160 | /* Set up the struct net_device associated with this card. Called after |
161 | * probing succeeds. | |
162 | */ | |
163 | int com20020_found(struct net_device *dev, int shared) | |
164 | { | |
165 | struct arcnet_local *lp; | |
166 | int ioaddr = dev->base_addr; | |
167 | ||
168 | /* Initialize the rest of the device structure. */ | |
169 | ||
454d7c9b | 170 | lp = netdev_priv(dev); |
1da177e4 LT |
171 | |
172 | lp->hw.owner = THIS_MODULE; | |
173 | lp->hw.command = com20020_command; | |
174 | lp->hw.status = com20020_status; | |
175 | lp->hw.intmask = com20020_setmask; | |
176 | lp->hw.reset = com20020_reset; | |
177 | lp->hw.copy_to_card = com20020_copy_to_card; | |
178 | lp->hw.copy_from_card = com20020_copy_from_card; | |
179 | lp->hw.close = com20020_close; | |
180 | ||
1da177e4 LT |
181 | if (!dev->dev_addr[0]) |
182 | dev->dev_addr[0] = inb(ioaddr + BUS_ALIGN*8); /* FIXME: do this some other way! */ | |
183 | ||
184 | SET_SUBADR(SUB_SETUP1); | |
185 | outb(lp->setup, _XREG); | |
186 | ||
187 | if (lp->card_flags & ARC_CAN_10MBIT) | |
188 | { | |
189 | SET_SUBADR(SUB_SETUP2); | |
190 | outb(lp->setup2, _XREG); | |
191 | ||
192 | /* must now write the magic "restart operation" command */ | |
193 | mdelay(1); | |
194 | outb(0x18, _COMMAND); | |
195 | } | |
196 | ||
197 | lp->config = 0x20 | (lp->timeout << 3) | (lp->backplane << 2) | 1; | |
198 | /* Default 0x38 + register: Node ID */ | |
199 | SETCONF; | |
200 | outb(dev->dev_addr[0], _XREG); | |
201 | ||
202 | /* reserve the irq */ | |
a0607fd3 | 203 | if (request_irq(dev->irq, arcnet_interrupt, shared, |
1da177e4 LT |
204 | "arcnet (COM20020)", dev)) { |
205 | BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", dev->irq); | |
206 | return -ENODEV; | |
207 | } | |
208 | ||
209 | dev->base_addr = ioaddr; | |
210 | ||
211 | BUGMSG(D_NORMAL, "%s: station %02Xh found at %03lXh, IRQ %d.\n", | |
212 | lp->card_name, dev->dev_addr[0], dev->base_addr, dev->irq); | |
213 | ||
214 | if (lp->backplane) | |
215 | BUGMSG(D_NORMAL, "Using backplane mode.\n"); | |
216 | ||
217 | if (lp->timeout != 3) | |
218 | BUGMSG(D_NORMAL, "Using extended timeout value of %d.\n", lp->timeout); | |
219 | ||
220 | BUGMSG(D_NORMAL, "Using CKP %d - data rate %s.\n", | |
221 | lp->setup >> 1, | |
222 | clockrates[3 - ((lp->setup2 & 0xF0) >> 4) + ((lp->setup & 0x0F) >> 1)]); | |
223 | ||
224 | if (register_netdev(dev)) { | |
225 | free_irq(dev->irq, dev); | |
226 | return -EIO; | |
227 | } | |
228 | return 0; | |
229 | } | |
230 | ||
231 | ||
232 | /* | |
233 | * Do a hardware reset on the card, and set up necessary registers. | |
234 | * | |
235 | * This should be called as little as possible, because it disrupts the | |
236 | * token on the network (causes a RECON) and requires a significant delay. | |
237 | * | |
238 | * However, it does make sure the card is in a defined state. | |
239 | */ | |
240 | static int com20020_reset(struct net_device *dev, int really_reset) | |
241 | { | |
454d7c9b | 242 | struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 LT |
243 | u_int ioaddr = dev->base_addr; |
244 | u_char inbyte; | |
245 | ||
246 | BUGMSG(D_DEBUG, "%s: %d: %s: dev: %p, lp: %p, dev->name: %s\n", | |
b39d66a8 | 247 | __FILE__,__LINE__,__func__,dev,lp,dev->name); |
1da177e4 LT |
248 | BUGMSG(D_INIT, "Resetting %s (status=%02Xh)\n", |
249 | dev->name, ASTATUS()); | |
250 | ||
b39d66a8 | 251 | BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__); |
1da177e4 LT |
252 | lp->config = TXENcfg | (lp->timeout << 3) | (lp->backplane << 2); |
253 | /* power-up defaults */ | |
254 | SETCONF; | |
b39d66a8 | 255 | BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__); |
1da177e4 LT |
256 | |
257 | if (really_reset) { | |
258 | /* reset the card */ | |
259 | ARCRESET; | |
260 | mdelay(RESETtime * 2); /* COM20020 seems to be slower sometimes */ | |
261 | } | |
262 | /* clear flags & end reset */ | |
b39d66a8 | 263 | BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__); |
1da177e4 LT |
264 | ACOMMAND(CFLAGScmd | RESETclear | CONFIGclear); |
265 | ||
266 | /* verify that the ARCnet signature byte is present */ | |
b39d66a8 | 267 | BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__); |
1da177e4 LT |
268 | |
269 | com20020_copy_from_card(dev, 0, 0, &inbyte, 1); | |
b39d66a8 | 270 | BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__); |
1da177e4 | 271 | if (inbyte != TESTvalue) { |
b39d66a8 | 272 | BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__); |
1da177e4 LT |
273 | BUGMSG(D_NORMAL, "reset failed: TESTvalue not present.\n"); |
274 | return 1; | |
275 | } | |
276 | /* enable extended (512-byte) packets */ | |
277 | ACOMMAND(CONFIGcmd | EXTconf); | |
b39d66a8 | 278 | BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__); |
1da177e4 LT |
279 | |
280 | /* done! return success. */ | |
281 | return 0; | |
282 | } | |
283 | ||
284 | ||
285 | static void com20020_setmask(struct net_device *dev, int mask) | |
286 | { | |
287 | u_int ioaddr = dev->base_addr; | |
288 | BUGMSG(D_DURING, "Setting mask to %x at %x\n",mask,ioaddr); | |
289 | AINTMASK(mask); | |
290 | } | |
291 | ||
292 | ||
293 | static void com20020_command(struct net_device *dev, int cmd) | |
294 | { | |
295 | u_int ioaddr = dev->base_addr; | |
296 | ACOMMAND(cmd); | |
297 | } | |
298 | ||
299 | ||
300 | static int com20020_status(struct net_device *dev) | |
301 | { | |
302 | u_int ioaddr = dev->base_addr; | |
303 | ||
304 | return ASTATUS() + (ADIAGSTATUS()<<8); | |
305 | } | |
306 | ||
307 | static void com20020_close(struct net_device *dev) | |
308 | { | |
454d7c9b | 309 | struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 LT |
310 | int ioaddr = dev->base_addr; |
311 | ||
312 | /* disable transmitter */ | |
313 | lp->config &= ~TXENcfg; | |
314 | SETCONF; | |
315 | } | |
316 | ||
317 | /* Set or clear the multicast filter for this adaptor. | |
318 | * num_addrs == -1 Promiscuous mode, receive all packets | |
319 | * num_addrs == 0 Normal mode, clear multicast list | |
320 | * num_addrs > 0 Multicast mode, receive normal and MC packets, and do | |
321 | * best-effort filtering. | |
322 | * FIXME - do multicast stuff, not just promiscuous. | |
323 | */ | |
324 | static void com20020_set_mc_list(struct net_device *dev) | |
325 | { | |
454d7c9b | 326 | struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 LT |
327 | int ioaddr = dev->base_addr; |
328 | ||
329 | if ((dev->flags & IFF_PROMISC) && (dev->flags & IFF_UP)) { /* Enable promiscuous mode */ | |
330 | if (!(lp->setup & PROMISCset)) | |
331 | BUGMSG(D_NORMAL, "Setting promiscuous flag...\n"); | |
332 | SET_SUBADR(SUB_SETUP1); | |
333 | lp->setup |= PROMISCset; | |
334 | outb(lp->setup, _XREG); | |
335 | } else | |
336 | /* Disable promiscuous mode, use normal mode */ | |
337 | { | |
338 | if ((lp->setup & PROMISCset)) | |
339 | BUGMSG(D_NORMAL, "Resetting promiscuous flag...\n"); | |
340 | SET_SUBADR(SUB_SETUP1); | |
341 | lp->setup &= ~PROMISCset; | |
342 | outb(lp->setup, _XREG); | |
343 | } | |
344 | } | |
345 | ||
ace48ffb | 346 | #if defined(CONFIG_ARCNET_COM20020_PCI_MODULE) || \ |
2a10387e RD |
347 | defined(CONFIG_ARCNET_COM20020_ISA_MODULE) || \ |
348 | defined(CONFIG_ARCNET_COM20020_CS_MODULE) | |
1da177e4 LT |
349 | EXPORT_SYMBOL(com20020_check); |
350 | EXPORT_SYMBOL(com20020_found); | |
dd0a251c | 351 | EXPORT_SYMBOL(com20020_netdev_ops); |
ace48ffb | 352 | #endif |
1da177e4 LT |
353 | |
354 | MODULE_LICENSE("GPL"); | |
355 | ||
ace48ffb RD |
356 | #ifdef MODULE |
357 | ||
0ebd1c1d | 358 | static int __init com20020_module_init(void) |
1da177e4 LT |
359 | { |
360 | BUGLVL(D_NORMAL) printk(VERSION); | |
361 | return 0; | |
362 | } | |
363 | ||
0ebd1c1d | 364 | static void __exit com20020_module_exit(void) |
1da177e4 LT |
365 | { |
366 | } | |
0ebd1c1d JS |
367 | module_init(com20020_module_init); |
368 | module_exit(com20020_module_exit); | |
1da177e4 | 369 | #endif /* MODULE */ |