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tty: move obsolete and broken tty drivers to drivers/staging/tty/
[wandboard.git] / drivers / char / rio / riocmd.c
blobf121357e5af093ee270e9332ce6267df807ea724
1 /*
2 ** -----------------------------------------------------------------------------
3 **
4 ** Perle Specialix driver for Linux
5 ** ported from the existing SCO driver source
6 **
7 *
8 * (C) 1990 - 2000 Specialix International Ltd., Byfleet, Surrey, UK.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 **
24 ** Module : riocmd.c
25 ** SID : 1.2
26 ** Last Modified : 11/6/98 10:33:41
27 ** Retrieved : 11/6/98 10:33:49
28 **
29 ** ident @(#)riocmd.c 1.2
30 **
31 ** -----------------------------------------------------------------------------
32 */
33
34 #include <linux/module.h>
35 #include <linux/sched.h>
36 #include <linux/slab.h>
37 #include <linux/errno.h>
38 #include <linux/tty.h>
39 #include <asm/io.h>
40 #include <asm/system.h>
41 #include <asm/string.h>
42 #include <asm/uaccess.h>
43
44 #include <linux/termios.h>
45 #include <linux/serial.h>
46
47 #include <linux/generic_serial.h>
48
49 #include "linux_compat.h"
50 #include "rio_linux.h"
51 #include "pkt.h"
52 #include "daemon.h"
53 #include "rio.h"
54 #include "riospace.h"
55 #include "cmdpkt.h"
56 #include "map.h"
57 #include "rup.h"
58 #include "port.h"
59 #include "riodrvr.h"
60 #include "rioinfo.h"
61 #include "func.h"
62 #include "errors.h"
63 #include "pci.h"
64
65 #include "parmmap.h"
66 #include "unixrup.h"
67 #include "board.h"
68 #include "host.h"
69 #include "phb.h"
70 #include "link.h"
71 #include "cmdblk.h"
72 #include "route.h"
73 #include "cirrus.h"
74
75
76 static struct IdentifyRta IdRta;
77 static struct KillNeighbour KillUnit;
78
79 int RIOFoadRta(struct Host *HostP, struct Map *MapP)
80 {
81 struct CmdBlk *CmdBlkP;
82
83 rio_dprintk(RIO_DEBUG_CMD, "FOAD RTA\n");
84
85 CmdBlkP = RIOGetCmdBlk();
86
87 if (!CmdBlkP) {
88 rio_dprintk(RIO_DEBUG_CMD, "FOAD RTA: GetCmdBlk failed\n");
89 return -ENXIO;
90 }
91
92 CmdBlkP->Packet.dest_unit = MapP->ID;
93 CmdBlkP->Packet.dest_port = BOOT_RUP;
94 CmdBlkP->Packet.src_unit = 0;
95 CmdBlkP->Packet.src_port = BOOT_RUP;
96 CmdBlkP->Packet.len = 0x84;
97 CmdBlkP->Packet.data[0] = IFOAD;
98 CmdBlkP->Packet.data[1] = 0;
99 CmdBlkP->Packet.data[2] = IFOAD_MAGIC & 0xFF;
100 CmdBlkP->Packet.data[3] = (IFOAD_MAGIC >> 8) & 0xFF;
101
102 if (RIOQueueCmdBlk(HostP, MapP->ID - 1, CmdBlkP) == RIO_FAIL) {
103 rio_dprintk(RIO_DEBUG_CMD, "FOAD RTA: Failed to queue foad command\n");
104 return -EIO;
105 }
106 return 0;
107 }
108
109 int RIOZombieRta(struct Host *HostP, struct Map *MapP)
110 {
111 struct CmdBlk *CmdBlkP;
112
113 rio_dprintk(RIO_DEBUG_CMD, "ZOMBIE RTA\n");
114
115 CmdBlkP = RIOGetCmdBlk();
116
117 if (!CmdBlkP) {
118 rio_dprintk(RIO_DEBUG_CMD, "ZOMBIE RTA: GetCmdBlk failed\n");
119 return -ENXIO;
120 }
121
122 CmdBlkP->Packet.dest_unit = MapP->ID;
123 CmdBlkP->Packet.dest_port = BOOT_RUP;
124 CmdBlkP->Packet.src_unit = 0;
125 CmdBlkP->Packet.src_port = BOOT_RUP;
126 CmdBlkP->Packet.len = 0x84;
127 CmdBlkP->Packet.data[0] = ZOMBIE;
128 CmdBlkP->Packet.data[1] = 0;
129 CmdBlkP->Packet.data[2] = ZOMBIE_MAGIC & 0xFF;
130 CmdBlkP->Packet.data[3] = (ZOMBIE_MAGIC >> 8) & 0xFF;
131
132 if (RIOQueueCmdBlk(HostP, MapP->ID - 1, CmdBlkP) == RIO_FAIL) {
133 rio_dprintk(RIO_DEBUG_CMD, "ZOMBIE RTA: Failed to queue zombie command\n");
134 return -EIO;
135 }
136 return 0;
137 }
138
139 int RIOCommandRta(struct rio_info *p, unsigned long RtaUnique, int (*func) (struct Host * HostP, struct Map * MapP))
140 {
141 unsigned int Host;
142
143 rio_dprintk(RIO_DEBUG_CMD, "Command RTA 0x%lx func %p\n", RtaUnique, func);
144
145 if (!RtaUnique)
146 return (0);
147
148 for (Host = 0; Host < p->RIONumHosts; Host++) {
149 unsigned int Rta;
150 struct Host *HostP = &p->RIOHosts[Host];
151
152 for (Rta = 0; Rta < RTAS_PER_HOST; Rta++) {
153 struct Map *MapP = &HostP->Mapping[Rta];
154
155 if (MapP->RtaUniqueNum == RtaUnique) {
156 uint Link;
157
158 /*
159 ** now, lets just check we have a route to it...
160 ** IF the routing stuff is working, then one of the
161 ** topology entries for this unit will have a legit
162 ** route *somewhere*. We care not where - if its got
163 ** any connections, we can get to it.
164 */
165 for (Link = 0; Link < LINKS_PER_UNIT; Link++) {
166 if (MapP->Topology[Link].Unit <= (u8) MAX_RUP) {
167 /*
168 ** Its worth trying the operation...
169 */
170 return (*func) (HostP, MapP);
171 }
172 }
173 }
174 }
175 }
176 return -ENXIO;
177 }
178
179
180 int RIOIdentifyRta(struct rio_info *p, void __user * arg)
181 {
182 unsigned int Host;
183
184 if (copy_from_user(&IdRta, arg, sizeof(IdRta))) {
185 rio_dprintk(RIO_DEBUG_CMD, "RIO_IDENTIFY_RTA copy failed\n");
186 p->RIOError.Error = COPYIN_FAILED;
187 return -EFAULT;
188 }
189
190 for (Host = 0; Host < p->RIONumHosts; Host++) {
191 unsigned int Rta;
192 struct Host *HostP = &p->RIOHosts[Host];
193
194 for (Rta = 0; Rta < RTAS_PER_HOST; Rta++) {
195 struct Map *MapP = &HostP->Mapping[Rta];
196
197 if (MapP->RtaUniqueNum == IdRta.RtaUnique) {
198 uint Link;
199 /*
200 ** now, lets just check we have a route to it...
201 ** IF the routing stuff is working, then one of the
202 ** topology entries for this unit will have a legit
203 ** route *somewhere*. We care not where - if its got
204 ** any connections, we can get to it.
205 */
206 for (Link = 0; Link < LINKS_PER_UNIT; Link++) {
207 if (MapP->Topology[Link].Unit <= (u8) MAX_RUP) {
208 /*
209 ** Its worth trying the operation...
210 */
211 struct CmdBlk *CmdBlkP;
212
213 rio_dprintk(RIO_DEBUG_CMD, "IDENTIFY RTA\n");
214
215 CmdBlkP = RIOGetCmdBlk();
216
217 if (!CmdBlkP) {
218 rio_dprintk(RIO_DEBUG_CMD, "IDENTIFY RTA: GetCmdBlk failed\n");
219 return -ENXIO;
220 }
221
222 CmdBlkP->Packet.dest_unit = MapP->ID;
223 CmdBlkP->Packet.dest_port = BOOT_RUP;
224 CmdBlkP->Packet.src_unit = 0;
225 CmdBlkP->Packet.src_port = BOOT_RUP;
226 CmdBlkP->Packet.len = 0x84;
227 CmdBlkP->Packet.data[0] = IDENTIFY;
228 CmdBlkP->Packet.data[1] = 0;
229 CmdBlkP->Packet.data[2] = IdRta.ID;
230
231 if (RIOQueueCmdBlk(HostP, MapP->ID - 1, CmdBlkP) == RIO_FAIL) {
232 rio_dprintk(RIO_DEBUG_CMD, "IDENTIFY RTA: Failed to queue command\n");
233 return -EIO;
234 }
235 return 0;
236 }
237 }
238 }
239 }
240 }
241 return -ENOENT;
242 }
243
244
245 int RIOKillNeighbour(struct rio_info *p, void __user * arg)
246 {
247 uint Host;
248 uint ID;
249 struct Host *HostP;
250 struct CmdBlk *CmdBlkP;
251
252 rio_dprintk(RIO_DEBUG_CMD, "KILL HOST NEIGHBOUR\n");
253
254 if (copy_from_user(&KillUnit, arg, sizeof(KillUnit))) {
255 rio_dprintk(RIO_DEBUG_CMD, "RIO_KILL_NEIGHBOUR copy failed\n");
256 p->RIOError.Error = COPYIN_FAILED;
257 return -EFAULT;
258 }
259
260 if (KillUnit.Link > 3)
261 return -ENXIO;
262
263 CmdBlkP = RIOGetCmdBlk();
264
265 if (!CmdBlkP) {
266 rio_dprintk(RIO_DEBUG_CMD, "UFOAD: GetCmdBlk failed\n");
267 return -ENXIO;
268 }
269
270 CmdBlkP->Packet.dest_unit = 0;
271 CmdBlkP->Packet.src_unit = 0;
272 CmdBlkP->Packet.dest_port = BOOT_RUP;
273 CmdBlkP->Packet.src_port = BOOT_RUP;
274 CmdBlkP->Packet.len = 0x84;
275 CmdBlkP->Packet.data[0] = UFOAD;
276 CmdBlkP->Packet.data[1] = KillUnit.Link;
277 CmdBlkP->Packet.data[2] = UFOAD_MAGIC & 0xFF;
278 CmdBlkP->Packet.data[3] = (UFOAD_MAGIC >> 8) & 0xFF;
279
280 for (Host = 0; Host < p->RIONumHosts; Host++) {
281 ID = 0;
282 HostP = &p->RIOHosts[Host];
283
284 if (HostP->UniqueNum == KillUnit.UniqueNum) {
285 if (RIOQueueCmdBlk(HostP, RTAS_PER_HOST + KillUnit.Link, CmdBlkP) == RIO_FAIL) {
286 rio_dprintk(RIO_DEBUG_CMD, "UFOAD: Failed queue command\n");
287 return -EIO;
288 }
289 return 0;
290 }
291
292 for (ID = 0; ID < RTAS_PER_HOST; ID++) {
293 if (HostP->Mapping[ID].RtaUniqueNum == KillUnit.UniqueNum) {
294 CmdBlkP->Packet.dest_unit = ID + 1;
295 if (RIOQueueCmdBlk(HostP, ID, CmdBlkP) == RIO_FAIL) {
296 rio_dprintk(RIO_DEBUG_CMD, "UFOAD: Failed queue command\n");
297 return -EIO;
298 }
299 return 0;
300 }
301 }
302 }
303 RIOFreeCmdBlk(CmdBlkP);
304 return -ENXIO;
305 }
306
307 int RIOSuspendBootRta(struct Host *HostP, int ID, int Link)
308 {
309 struct CmdBlk *CmdBlkP;
310
311 rio_dprintk(RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA ID %d, link %c\n", ID, 'A' + Link);
312
313 CmdBlkP = RIOGetCmdBlk();
314
315 if (!CmdBlkP) {
316 rio_dprintk(RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA: GetCmdBlk failed\n");
317 return -ENXIO;
318 }
319
320 CmdBlkP->Packet.dest_unit = ID;
321 CmdBlkP->Packet.dest_port = BOOT_RUP;
322 CmdBlkP->Packet.src_unit = 0;
323 CmdBlkP->Packet.src_port = BOOT_RUP;
324 CmdBlkP->Packet.len = 0x84;
325 CmdBlkP->Packet.data[0] = IWAIT;
326 CmdBlkP->Packet.data[1] = Link;
327 CmdBlkP->Packet.data[2] = IWAIT_MAGIC & 0xFF;
328 CmdBlkP->Packet.data[3] = (IWAIT_MAGIC >> 8) & 0xFF;
329
330 if (RIOQueueCmdBlk(HostP, ID - 1, CmdBlkP) == RIO_FAIL) {
331 rio_dprintk(RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA: Failed to queue iwait command\n");
332 return -EIO;
333 }
334 return 0;
335 }
336
337 int RIOFoadWakeup(struct rio_info *p)
338 {
339 int port;
340 struct Port *PortP;
341 unsigned long flags;
342
343 for (port = 0; port < RIO_PORTS; port++) {
344 PortP = p->RIOPortp[port];
345
346 rio_spin_lock_irqsave(&PortP->portSem, flags);
347 PortP->Config = 0;
348 PortP->State = 0;
349 PortP->InUse = NOT_INUSE;
350 PortP->PortState = 0;
351 PortP->FlushCmdBodge = 0;
352 PortP->ModemLines = 0;
353 PortP->ModemState = 0;
354 PortP->CookMode = 0;
355 PortP->ParamSem = 0;
356 PortP->Mapped = 0;
357 PortP->WflushFlag = 0;
358 PortP->MagicFlags = 0;
359 PortP->RxDataStart = 0;
360 PortP->TxBufferIn = 0;
361 PortP->TxBufferOut = 0;
362 rio_spin_unlock_irqrestore(&PortP->portSem, flags);
363 }
364 return (0);
365 }
366
367 /*
368 ** Incoming command on the COMMAND_RUP to be processed.
369 */
370 static int RIOCommandRup(struct rio_info *p, uint Rup, struct Host *HostP, struct PKT __iomem *PacketP)
371 {
372 struct PktCmd __iomem *PktCmdP = (struct PktCmd __iomem *)PacketP->data;
373 struct Port *PortP;
374 struct UnixRup *UnixRupP;
375 unsigned short SysPort;
376 unsigned short ReportedModemStatus;
377 unsigned short rup;
378 unsigned short subCommand;
379 unsigned long flags;
380
381 func_enter();
382
383 /*
384 ** 16 port RTA note:
385 ** Command rup packets coming from the RTA will have pkt->data[1] (which
386 ** translates to PktCmdP->PhbNum) set to the host port number for the
387 ** particular unit. To access the correct BaseSysPort for a 16 port RTA,
388 ** we can use PhbNum to get the rup number for the appropriate 8 port
389 ** block (for the first block, this should be equal to 'Rup').
390 */
391 rup = readb(&PktCmdP->PhbNum) / (unsigned short) PORTS_PER_RTA;
392 UnixRupP = &HostP->UnixRups[rup];
393 SysPort = UnixRupP->BaseSysPort + (readb(&PktCmdP->PhbNum) % (unsigned short) PORTS_PER_RTA);
394 rio_dprintk(RIO_DEBUG_CMD, "Command on rup %d, port %d\n", rup, SysPort);
395
396 if (UnixRupP->BaseSysPort == NO_PORT) {
397 rio_dprintk(RIO_DEBUG_CMD, "OBSCURE ERROR!\n");
398 rio_dprintk(RIO_DEBUG_CMD, "Diagnostics follow. Please WRITE THESE DOWN and report them to Specialix Technical Support\n");
399 rio_dprintk(RIO_DEBUG_CMD, "CONTROL information: Host number %Zd, name ``%s''\n", HostP - p->RIOHosts, HostP->Name);
400 rio_dprintk(RIO_DEBUG_CMD, "CONTROL information: Rup number 0x%x\n", rup);
401
402 if (Rup < (unsigned short) MAX_RUP) {
403 rio_dprintk(RIO_DEBUG_CMD, "CONTROL information: This is the RUP for RTA ``%s''\n", HostP->Mapping[Rup].Name);
404 } else
405 rio_dprintk(RIO_DEBUG_CMD, "CONTROL information: This is the RUP for link ``%c'' of host ``%s''\n", ('A' + Rup - MAX_RUP), HostP->Name);
406
407 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Destination 0x%x:0x%x\n", readb(&PacketP->dest_unit), readb(&PacketP->dest_port));
408 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Source 0x%x:0x%x\n", readb(&PacketP->src_unit), readb(&PacketP->src_port));
409 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Length 0x%x (%d)\n", readb(&PacketP->len), readb(&PacketP->len));
410 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Control 0x%x (%d)\n", readb(&PacketP->control), readb(&PacketP->control));
411 rio_dprintk(RIO_DEBUG_CMD, "PACKET information: Check 0x%x (%d)\n", readw(&PacketP->csum), readw(&PacketP->csum));
412 rio_dprintk(RIO_DEBUG_CMD, "COMMAND information: Host Port Number 0x%x, " "Command Code 0x%x\n", readb(&PktCmdP->PhbNum), readb(&PktCmdP->Command));
413 return 1;
414 }
415 PortP = p->RIOPortp[SysPort];
416 rio_spin_lock_irqsave(&PortP->portSem, flags);
417 switch (readb(&PktCmdP->Command)) {
418 case RIOC_BREAK_RECEIVED:
419 rio_dprintk(RIO_DEBUG_CMD, "Received a break!\n");
420 /* If the current line disc. is not multi-threading and
421 the current processor is not the default, reset rup_intr
422 and return 0 to ensure that the command packet is
423 not freed. */
424 /* Call tmgr HANGUP HERE */
425 /* Fix this later when every thing works !!!! RAMRAJ */
426 gs_got_break(&PortP->gs);
427 break;
428
429 case RIOC_COMPLETE:
430 rio_dprintk(RIO_DEBUG_CMD, "Command complete on phb %d host %Zd\n", readb(&PktCmdP->PhbNum), HostP - p->RIOHosts);
431 subCommand = 1;
432 switch (readb(&PktCmdP->SubCommand)) {
433 case RIOC_MEMDUMP:
434 rio_dprintk(RIO_DEBUG_CMD, "Memory dump cmd (0x%x) from addr 0x%x\n", readb(&PktCmdP->SubCommand), readw(&PktCmdP->SubAddr));
435 break;
436 case RIOC_READ_REGISTER:
437 rio_dprintk(RIO_DEBUG_CMD, "Read register (0x%x)\n", readw(&PktCmdP->SubAddr));
438 p->CdRegister = (readb(&PktCmdP->ModemStatus) & RIOC_MSVR1_HOST);
439 break;
440 default:
441 subCommand = 0;
442 break;
443 }
444 if (subCommand)
445 break;
446 rio_dprintk(RIO_DEBUG_CMD, "New status is 0x%x was 0x%x\n", readb(&PktCmdP->PortStatus), PortP->PortState);
447 if (PortP->PortState != readb(&PktCmdP->PortStatus)) {
448 rio_dprintk(RIO_DEBUG_CMD, "Mark status & wakeup\n");
449 PortP->PortState = readb(&PktCmdP->PortStatus);
450 /* What should we do here ...
451 wakeup( &PortP->PortState );
452 */
453 } else
454 rio_dprintk(RIO_DEBUG_CMD, "No change\n");
455
456 /* FALLTHROUGH */
457 case RIOC_MODEM_STATUS:
458 /*
459 ** Knock out the tbusy and tstop bits, as these are not relevant
460 ** to the check for modem status change (they're just there because
461 ** it's a convenient place to put them!).
462 */
463 ReportedModemStatus = readb(&PktCmdP->ModemStatus);
464 if ((PortP->ModemState & RIOC_MSVR1_HOST) ==
465 (ReportedModemStatus & RIOC_MSVR1_HOST)) {
466 rio_dprintk(RIO_DEBUG_CMD, "Modem status unchanged 0x%x\n", PortP->ModemState);
467 /*
468 ** Update ModemState just in case tbusy or tstop states have
469 ** changed.
470 */
471 PortP->ModemState = ReportedModemStatus;
472 } else {
473 rio_dprintk(RIO_DEBUG_CMD, "Modem status change from 0x%x to 0x%x\n", PortP->ModemState, ReportedModemStatus);
474 PortP->ModemState = ReportedModemStatus;
475 #ifdef MODEM_SUPPORT
476 if (PortP->Mapped) {
477 /***********************************************************\
478 *************************************************************
479 *** ***
480 *** M O D E M S T A T E C H A N G E ***
481 *** ***
482 *************************************************************
483 \***********************************************************/
484 /*
485 ** If the device is a modem, then check the modem
486 ** carrier.
487 */
488 if (PortP->gs.port.tty == NULL)
489 break;
490 if (PortP->gs.port.tty->termios == NULL)
491 break;
492
493 if (!(PortP->gs.port.tty->termios->c_cflag & CLOCAL) && ((PortP->State & (RIO_MOPEN | RIO_WOPEN)))) {
494
495 rio_dprintk(RIO_DEBUG_CMD, "Is there a Carrier?\n");
496 /*
497 ** Is there a carrier?
498 */
499 if (PortP->ModemState & RIOC_MSVR1_CD) {
500 /*
501 ** Has carrier just appeared?
502 */
503 if (!(PortP->State & RIO_CARR_ON)) {
504 rio_dprintk(RIO_DEBUG_CMD, "Carrier just came up.\n");
505 PortP->State |= RIO_CARR_ON;
506 /*
507 ** wakeup anyone in WOPEN
508 */
509 if (PortP->State & (PORT_ISOPEN | RIO_WOPEN))
510 wake_up_interruptible(&PortP->gs.port.open_wait);
511 }
512 } else {
513 /*
514 ** Has carrier just dropped?
515 */
516 if (PortP->State & RIO_CARR_ON) {
517 if (PortP->State & (PORT_ISOPEN | RIO_WOPEN | RIO_MOPEN))
518 tty_hangup(PortP->gs.port.tty);
519 PortP->State &= ~RIO_CARR_ON;
520 rio_dprintk(RIO_DEBUG_CMD, "Carrirer just went down\n");
521 }
522 }
523 }
524 }
525 #endif
526 }
527 break;
528
529 default:
530 rio_dprintk(RIO_DEBUG_CMD, "Unknown command %d on CMD_RUP of host %Zd\n", readb(&PktCmdP->Command), HostP - p->RIOHosts);
531 break;
532 }
533 rio_spin_unlock_irqrestore(&PortP->portSem, flags);
534
535 func_exit();
536
537 return 1;
538 }
539
540 /*
541 ** The command mechanism:
542 ** Each rup has a chain of commands associated with it.
543 ** This chain is maintained by routines in this file.
544 ** Periodically we are called and we run a quick check of all the
545 ** active chains to determine if there is a command to be executed,
546 ** and if the rup is ready to accept it.
547 **
548 */
549
550 /*
551 ** Allocate an empty command block.
552 */
553 struct CmdBlk *RIOGetCmdBlk(void)
554 {
555 struct CmdBlk *CmdBlkP;
556
557 CmdBlkP = kzalloc(sizeof(struct CmdBlk), GFP_ATOMIC);
558 return CmdBlkP;
559 }
560
561 /*
562 ** Return a block to the head of the free list.
563 */
564 void RIOFreeCmdBlk(struct CmdBlk *CmdBlkP)
565 {
566 kfree(CmdBlkP);
567 }
568
569 /*
570 ** attach a command block to the list of commands to be performed for
571 ** a given rup.
572 */
573 int RIOQueueCmdBlk(struct Host *HostP, uint Rup, struct CmdBlk *CmdBlkP)
574 {
575 struct CmdBlk **Base;
576 struct UnixRup *UnixRupP;
577 unsigned long flags;
578
579 if (Rup >= (unsigned short) (MAX_RUP + LINKS_PER_UNIT)) {
580 rio_dprintk(RIO_DEBUG_CMD, "Illegal rup number %d in RIOQueueCmdBlk\n", Rup);
581 RIOFreeCmdBlk(CmdBlkP);
582 return RIO_FAIL;
583 }
584
585 UnixRupP = &HostP->UnixRups[Rup];
586
587 rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
588
589 /*
590 ** If the RUP is currently inactive, then put the request
591 ** straight on the RUP....
592 */
593 if ((UnixRupP->CmdsWaitingP == NULL) && (UnixRupP->CmdPendingP == NULL) && (readw(&UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE) && (CmdBlkP->PreFuncP ? (*CmdBlkP->PreFuncP) (CmdBlkP->PreArg, CmdBlkP)
594 : 1)) {
595 rio_dprintk(RIO_DEBUG_CMD, "RUP inactive-placing command straight on. Cmd byte is 0x%x\n", CmdBlkP->Packet.data[0]);
596
597 /*
598 ** Whammy! blat that pack!
599 */
600 HostP->Copy(&CmdBlkP->Packet, RIO_PTR(HostP->Caddr, readw(&UnixRupP->RupP->txpkt)), sizeof(struct PKT));
601
602 /*
603 ** place command packet on the pending position.
604 */
605 UnixRupP->CmdPendingP = CmdBlkP;
606
607 /*
608 ** set the command register
609 */
610 writew(TX_PACKET_READY, &UnixRupP->RupP->txcontrol);
611
612 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
613
614 return 0;
615 }
616 rio_dprintk(RIO_DEBUG_CMD, "RUP active - en-queing\n");
617
618 if (UnixRupP->CmdsWaitingP != NULL)
619 rio_dprintk(RIO_DEBUG_CMD, "Rup active - command waiting\n");
620 if (UnixRupP->CmdPendingP != NULL)
621 rio_dprintk(RIO_DEBUG_CMD, "Rup active - command pending\n");
622 if (readw(&UnixRupP->RupP->txcontrol) != TX_RUP_INACTIVE)
623 rio_dprintk(RIO_DEBUG_CMD, "Rup active - command rup not ready\n");
624
625 Base = &UnixRupP->CmdsWaitingP;
626
627 rio_dprintk(RIO_DEBUG_CMD, "First try to queue cmdblk %p at %p\n", CmdBlkP, Base);
628
629 while (*Base) {
630 rio_dprintk(RIO_DEBUG_CMD, "Command cmdblk %p here\n", *Base);
631 Base = &((*Base)->NextP);
632 rio_dprintk(RIO_DEBUG_CMD, "Now try to queue cmd cmdblk %p at %p\n", CmdBlkP, Base);
633 }
634
635 rio_dprintk(RIO_DEBUG_CMD, "Will queue cmdblk %p at %p\n", CmdBlkP, Base);
636
637 *Base = CmdBlkP;
638
639 CmdBlkP->NextP = NULL;
640
641 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
642
643 return 0;
644 }
645
646 /*
647 ** Here we go - if there is an empty rup, fill it!
648 ** must be called at splrio() or higher.
649 */
650 void RIOPollHostCommands(struct rio_info *p, struct Host *HostP)
651 {
652 struct CmdBlk *CmdBlkP;
653 struct UnixRup *UnixRupP;
654 struct PKT __iomem *PacketP;
655 unsigned short Rup;
656 unsigned long flags;
657
658
659 Rup = MAX_RUP + LINKS_PER_UNIT;
660
661 do { /* do this loop for each RUP */
662 /*
663 ** locate the rup we are processing & lock it
664 */
665 UnixRupP = &HostP->UnixRups[--Rup];
666
667 spin_lock_irqsave(&UnixRupP->RupLock, flags);
668
669 /*
670 ** First check for incoming commands:
671 */
672 if (readw(&UnixRupP->RupP->rxcontrol) != RX_RUP_INACTIVE) {
673 int FreeMe;
674
675 PacketP = (struct PKT __iomem *) RIO_PTR(HostP->Caddr, readw(&UnixRupP->RupP->rxpkt));
676
677 switch (readb(&PacketP->dest_port)) {
678 case BOOT_RUP:
679 rio_dprintk(RIO_DEBUG_CMD, "Incoming Boot %s packet '%x'\n", readb(&PacketP->len) & 0x80 ? "Command" : "Data", readb(&PacketP->data[0]));
680 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
681 FreeMe = RIOBootRup(p, Rup, HostP, PacketP);
682 rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
683 break;
684
685 case COMMAND_RUP:
686 /*
687 ** Free the RUP lock as loss of carrier causes a
688 ** ttyflush which will (eventually) call another
689 ** routine that uses the RUP lock.
690 */
691 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
692 FreeMe = RIOCommandRup(p, Rup, HostP, PacketP);
693 if (readb(&PacketP->data[5]) == RIOC_MEMDUMP) {
694 rio_dprintk(RIO_DEBUG_CMD, "Memdump from 0x%x complete\n", readw(&(PacketP->data[6])));
695 rio_memcpy_fromio(p->RIOMemDump, &(PacketP->data[8]), 32);
696 }
697 rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
698 break;
699
700 case ROUTE_RUP:
701 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
702 FreeMe = RIORouteRup(p, Rup, HostP, PacketP);
703 rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
704 break;
705
706 default:
707 rio_dprintk(RIO_DEBUG_CMD, "Unknown RUP %d\n", readb(&PacketP->dest_port));
708 FreeMe = 1;
709 break;
710 }
711
712 if (FreeMe) {
713 rio_dprintk(RIO_DEBUG_CMD, "Free processed incoming command packet\n");
714 put_free_end(HostP, PacketP);
715
716 writew(RX_RUP_INACTIVE, &UnixRupP->RupP->rxcontrol);
717
718 if (readw(&UnixRupP->RupP->handshake) == PHB_HANDSHAKE_SET) {
719 rio_dprintk(RIO_DEBUG_CMD, "Handshake rup %d\n", Rup);
720 writew(PHB_HANDSHAKE_SET | PHB_HANDSHAKE_RESET, &UnixRupP->RupP->handshake);
721 }
722 }
723 }
724
725 /*
726 ** IF a command was running on the port,
727 ** and it has completed, then tidy it up.
728 */
729 if ((CmdBlkP = UnixRupP->CmdPendingP) && /* ASSIGN! */
730 (readw(&UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE)) {
731 /*
732 ** we are idle.
733 ** there is a command in pending.
734 ** Therefore, this command has finished.
735 ** So, wakeup whoever is waiting for it (and tell them
736 ** what happened).
737 */
738 if (CmdBlkP->Packet.dest_port == BOOT_RUP)
739 rio_dprintk(RIO_DEBUG_CMD, "Free Boot %s Command Block '%x'\n", CmdBlkP->Packet.len & 0x80 ? "Command" : "Data", CmdBlkP->Packet.data[0]);
740
741 rio_dprintk(RIO_DEBUG_CMD, "Command %p completed\n", CmdBlkP);
742
743 /*
744 ** Clear the Rup lock to prevent mutual exclusion.
745 */
746 if (CmdBlkP->PostFuncP) {
747 rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
748 (*CmdBlkP->PostFuncP) (CmdBlkP->PostArg, CmdBlkP);
749 rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
750 }
751
752 /*
753 ** ....clear the pending flag....
754 */
755 UnixRupP->CmdPendingP = NULL;
756
757 /*
758 ** ....and return the command block to the freelist.
759 */
760 RIOFreeCmdBlk(CmdBlkP);
761 }
762
763 /*
764 ** If there is a command for this rup, and the rup
765 ** is idle, then process the command
766 */
767 if ((CmdBlkP = UnixRupP->CmdsWaitingP) && /* ASSIGN! */
768 (UnixRupP->CmdPendingP == NULL) && (readw(&UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE)) {
769 /*
770 ** if the pre-function is non-zero, call it.
771 ** If it returns RIO_FAIL then don't
772 ** send this command yet!
773 */
774 if (!(CmdBlkP->PreFuncP ? (*CmdBlkP->PreFuncP) (CmdBlkP->PreArg, CmdBlkP) : 1)) {
775 rio_dprintk(RIO_DEBUG_CMD, "Not ready to start command %p\n", CmdBlkP);
776 } else {
777 rio_dprintk(RIO_DEBUG_CMD, "Start new command %p Cmd byte is 0x%x\n", CmdBlkP, CmdBlkP->Packet.data[0]);
778 /*
779 ** Whammy! blat that pack!
780 */
781 HostP->Copy(&CmdBlkP->Packet, RIO_PTR(HostP->Caddr, readw(&UnixRupP->RupP->txpkt)), sizeof(struct PKT));
782
783 /*
784 ** remove the command from the rup command queue...
785 */
786 UnixRupP->CmdsWaitingP = CmdBlkP->NextP;
787
788 /*
789 ** ...and place it on the pending position.
790 */
791 UnixRupP->CmdPendingP = CmdBlkP;
792
793 /*
794 ** set the command register
795 */
796 writew(TX_PACKET_READY, &UnixRupP->RupP->txcontrol);
797
798 /*
799 ** the command block will be freed
800 ** when the command has been processed.
801 */
802 }
803 }
804 spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
805 } while (Rup);
806 }
807
808 int RIOWFlushMark(unsigned long iPortP, struct CmdBlk *CmdBlkP)
809 {
810 struct Port *PortP = (struct Port *) iPortP;
811 unsigned long flags;
812
813 rio_spin_lock_irqsave(&PortP->portSem, flags);
814 PortP->WflushFlag++;
815 PortP->MagicFlags |= MAGIC_FLUSH;
816 rio_spin_unlock_irqrestore(&PortP->portSem, flags);
817 return RIOUnUse(iPortP, CmdBlkP);
818 }
819
820 int RIORFlushEnable(unsigned long iPortP, struct CmdBlk *CmdBlkP)
821 {
822 struct Port *PortP = (struct Port *) iPortP;
823 struct PKT __iomem *PacketP;
824 unsigned long flags;
825
826 rio_spin_lock_irqsave(&PortP->portSem, flags);
827
828 while (can_remove_receive(&PacketP, PortP)) {
829 remove_receive(PortP);
830 put_free_end(PortP->HostP, PacketP);
831 }
832
833 if (readw(&PortP->PhbP->handshake) == PHB_HANDSHAKE_SET) {
834 /*
835 ** MAGIC! (Basically, handshake the RX buffer, so that
836 ** the RTAs upstream can be re-enabled.)
837 */
838 rio_dprintk(RIO_DEBUG_CMD, "Util: Set RX handshake bit\n");
839 writew(PHB_HANDSHAKE_SET | PHB_HANDSHAKE_RESET, &PortP->PhbP->handshake);
840 }
841 rio_spin_unlock_irqrestore(&PortP->portSem, flags);
842 return RIOUnUse(iPortP, CmdBlkP);
843 }
844
845 int RIOUnUse(unsigned long iPortP, struct CmdBlk *CmdBlkP)
846 {
847 struct Port *PortP = (struct Port *) iPortP;
848 unsigned long flags;
849
850 rio_spin_lock_irqsave(&PortP->portSem, flags);
851
852 rio_dprintk(RIO_DEBUG_CMD, "Decrement in use count for port\n");
853
854 if (PortP->InUse) {
855 if (--PortP->InUse != NOT_INUSE) {
856 rio_spin_unlock_irqrestore(&PortP->portSem, flags);
857 return 0;
858 }
859 }
860 /*
861 ** While PortP->InUse is set (i.e. a preemptive command has been sent to
862 ** the RTA and is awaiting completion), any transmit data is prevented from
863 ** being transferred from the write queue into the transmit packets
864 ** (add_transmit) and no furthur transmit interrupt will be sent for that
865 ** data. The next interrupt will occur up to 500ms later (RIOIntr is called
866 ** twice a second as a saftey measure). This was the case when kermit was
867 ** used to send data into a RIO port. After each packet was sent, TCFLSH
868 ** was called to flush the read queue preemptively. PortP->InUse was
869 ** incremented, thereby blocking the 6 byte acknowledgement packet
870 ** transmitted back. This acknowledgment hung around for 500ms before
871 ** being sent, thus reducing input performance substantially!.
872 ** When PortP->InUse becomes NOT_INUSE, we must ensure that any data
873 ** hanging around in the transmit buffer is sent immediately.
874 */
875 writew(1, &PortP->HostP->ParmMapP->tx_intr);
876 /* What to do here ..
877 wakeup( (caddr_t)&(PortP->InUse) );
878 */
879 rio_spin_unlock_irqrestore(&PortP->portSem, flags);
880 return 0;
881 }
882
883 /*
884 **
885 ** How to use this file:
886 **
887 ** To send a command down a rup, you need to allocate a command block, fill
888 ** in the packet information, fill in the command number, fill in the pre-
889 ** and post- functions and arguments, and then add the command block to the
890 ** queue of command blocks for the port in question. When the port is idle,
891 ** then the pre-function will be called. If this returns RIO_FAIL then the
892 ** command will be re-queued and tried again at a later date (probably in one
893 ** clock tick). If the pre-function returns NOT RIO_FAIL, then the command
894 ** packet will be queued on the RUP, and the txcontrol field set to the
895 ** command number. When the txcontrol field has changed from being the
896 ** command number, then the post-function will be called, with the argument
897 ** specified earlier, a pointer to the command block, and the value of
898 ** txcontrol.
899 **
900 ** To allocate a command block, call RIOGetCmdBlk(). This returns a pointer
901 ** to the command block structure allocated, or NULL if there aren't any.
902 ** The block will have been zeroed for you.
903 **
904 ** The structure has the following fields:
905 **
906 ** struct CmdBlk
907 ** {
908 ** struct CmdBlk *NextP; ** Pointer to next command block **
909 ** struct PKT Packet; ** A packet, to copy to the rup **
910 ** int (*PreFuncP)(); ** The func to call to check if OK **
911 ** int PreArg; ** The arg for the func **
912 ** int (*PostFuncP)(); ** The func to call when completed **
913 ** int PostArg; ** The arg for the func **
914 ** };
915 **
916 ** You need to fill in ALL fields EXCEPT NextP, which is used to link the
917 ** blocks together either on the free list or on the Rup list.
918 **
919 ** Packet is an actual packet structure to be filled in with the packet
920 ** information associated with the command. You need to fill in everything,
921 ** as the command processor doesn't process the command packet in any way.
922 **
923 ** The PreFuncP is called before the packet is enqueued on the host rup.
924 ** PreFuncP is called as (*PreFuncP)(PreArg, CmdBlkP);. PreFuncP must
925 ** return !RIO_FAIL to have the packet queued on the rup, and RIO_FAIL
926 ** if the packet is NOT to be queued.
927 **
928 ** The PostFuncP is called when the command has completed. It is called
929 ** as (*PostFuncP)(PostArg, CmdBlkP, txcontrol);. PostFuncP is not expected
930 ** to return a value. PostFuncP does NOT need to free the command block,
931 ** as this happens automatically after PostFuncP returns.
932 **
933 ** Once the command block has been filled in, it is attached to the correct
934 ** queue by calling RIOQueueCmdBlk( HostP, Rup, CmdBlkP ) where HostP is
935 ** a pointer to the struct Host, Rup is the NUMBER of the rup (NOT a pointer
936 ** to it!), and CmdBlkP is the pointer to the command block allocated using
937 ** RIOGetCmdBlk().
938 **
939 */
WandBoard kernel