1 /* $Id: hfc_2bds0.c,v 1.18.2.6 2004/02/11 13:21:33 keil Exp $
2 *
3 * specific routines for CCD's HFC 2BDS0
4 *
5 * Author Karsten Keil
6 * Copyright by Karsten Keil <keil@isdn4linux.de>
7 *
8 * This software may be used and distributed according to the terms
9 * of the GNU General Public License, incorporated herein by reference.
10 *
11 */
12
13 #include <linux/init.h>
14 #include <linux/sched.h>
15 #include <linux/slab.h>
16 #include "hisax.h"
17 #include "hfc_2bds0.h"
18 #include "isdnl1.h"
19 #include <linux/interrupt.h>
20 /*
21 #define KDEBUG_DEF
22 #include "kdebug.h"
23 */
24
25 #define byteout(addr, val) outb(val, addr)
26 #define bytein(addr) inb(addr)
27
28 static void
dummyf(struct IsdnCardState * cs,u_char * data,int size)29 dummyf(struct IsdnCardState *cs, u_char *data, int size)
30 {
31 printk(KERN_WARNING "HiSax: hfcd dummy fifo called\n");
32 }
33
34 static inline u_char
ReadReg(struct IsdnCardState * cs,int data,u_char reg)35 ReadReg(struct IsdnCardState *cs, int data, u_char reg)
36 {
37 register u_char ret;
38
39 if (data) {
40 if (cs->hw.hfcD.cip != reg) {
41 cs->hw.hfcD.cip = reg;
42 byteout(cs->hw.hfcD.addr | 1, reg);
43 }
44 ret = bytein(cs->hw.hfcD.addr);
45 #ifdef HFC_REG_DEBUG
46 if (cs->debug & L1_DEB_HSCX_FIFO && (data != 2))
47 debugl1(cs, "t3c RD %02x %02x", reg, ret);
48 #endif
49 } else
50 ret = bytein(cs->hw.hfcD.addr | 1);
51 return (ret);
52 }
53
54 static inline void
WriteReg(struct IsdnCardState * cs,int data,u_char reg,u_char value)55 WriteReg(struct IsdnCardState *cs, int data, u_char reg, u_char value)
56 {
57 if (cs->hw.hfcD.cip != reg) {
58 cs->hw.hfcD.cip = reg;
59 byteout(cs->hw.hfcD.addr | 1, reg);
60 }
61 if (data)
62 byteout(cs->hw.hfcD.addr, value);
63 #ifdef HFC_REG_DEBUG
64 if (cs->debug & L1_DEB_HSCX_FIFO && (data != HFCD_DATA_NODEB))
65 debugl1(cs, "t3c W%c %02x %02x", data ? 'D' : 'C', reg, value);
66 #endif
67 }
68
69 /* Interface functions */
70
71 static u_char
readreghfcd(struct IsdnCardState * cs,u_char offset)72 readreghfcd(struct IsdnCardState *cs, u_char offset)
73 {
74 return (ReadReg(cs, HFCD_DATA, offset));
75 }
76
77 static void
writereghfcd(struct IsdnCardState * cs,u_char offset,u_char value)78 writereghfcd(struct IsdnCardState *cs, u_char offset, u_char value)
79 {
80 WriteReg(cs, HFCD_DATA, offset, value);
81 }
82
83 static inline int
WaitForBusy(struct IsdnCardState * cs)84 WaitForBusy(struct IsdnCardState *cs)
85 {
86 int to = 130;
87
88 while (!(ReadReg(cs, HFCD_DATA, HFCD_STAT) & HFCD_BUSY) && to) {
89 udelay(1);
90 to--;
91 }
92 if (!to)
93 printk(KERN_WARNING "HiSax: WaitForBusy timeout\n");
94 return (to);
95 }
96
97 static inline int
WaitNoBusy(struct IsdnCardState * cs)98 WaitNoBusy(struct IsdnCardState *cs)
99 {
100 int to = 130;
101
102 while ((ReadReg(cs, HFCD_STATUS, HFCD_STATUS) & HFCD_BUSY) && to) {
103 udelay(1);
104 to--;
105 }
106 if (!to)
107 printk(KERN_WARNING "HiSax: WaitNoBusy timeout\n");
108 return (to);
109 }
110
111 static int
SelFiFo(struct IsdnCardState * cs,u_char FiFo)112 SelFiFo(struct IsdnCardState *cs, u_char FiFo)
113 {
114 u_char cip;
115
116 if (cs->hw.hfcD.fifo == FiFo)
117 return (1);
118 switch (FiFo) {
119 case 0: cip = HFCB_FIFO | HFCB_Z1 | HFCB_SEND | HFCB_B1;
120 break;
121 case 1: cip = HFCB_FIFO | HFCB_Z1 | HFCB_REC | HFCB_B1;
122 break;
123 case 2: cip = HFCB_FIFO | HFCB_Z1 | HFCB_SEND | HFCB_B2;
124 break;
125 case 3: cip = HFCB_FIFO | HFCB_Z1 | HFCB_REC | HFCB_B2;
126 break;
127 case 4: cip = HFCD_FIFO | HFCD_Z1 | HFCD_SEND;
128 break;
129 case 5: cip = HFCD_FIFO | HFCD_Z1 | HFCD_REC;
130 break;
131 default:
132 debugl1(cs, "SelFiFo Error");
133 return (0);
134 }
135 cs->hw.hfcD.fifo = FiFo;
136 WaitNoBusy(cs);
137 cs->BC_Write_Reg(cs, HFCD_DATA, cip, 0);
138 WaitForBusy(cs);
139 return (2);
140 }
141
142 static int
GetFreeFifoBytes_B(struct BCState * bcs)143 GetFreeFifoBytes_B(struct BCState *bcs)
144 {
145 int s;
146
147 if (bcs->hw.hfc.f1 == bcs->hw.hfc.f2)
148 return (bcs->cs->hw.hfcD.bfifosize);
149 s = bcs->hw.hfc.send[bcs->hw.hfc.f1] - bcs->hw.hfc.send[bcs->hw.hfc.f2];
150 if (s <= 0)
151 s += bcs->cs->hw.hfcD.bfifosize;
152 s = bcs->cs->hw.hfcD.bfifosize - s;
153 return (s);
154 }
155
156 static int
GetFreeFifoBytes_D(struct IsdnCardState * cs)157 GetFreeFifoBytes_D(struct IsdnCardState *cs)
158 {
159 int s;
160
161 if (cs->hw.hfcD.f1 == cs->hw.hfcD.f2)
162 return (cs->hw.hfcD.dfifosize);
163 s = cs->hw.hfcD.send[cs->hw.hfcD.f1] - cs->hw.hfcD.send[cs->hw.hfcD.f2];
164 if (s <= 0)
165 s += cs->hw.hfcD.dfifosize;
166 s = cs->hw.hfcD.dfifosize - s;
167 return (s);
168 }
169
170 static int
ReadZReg(struct IsdnCardState * cs,u_char reg)171 ReadZReg(struct IsdnCardState *cs, u_char reg)
172 {
173 int val;
174
175 WaitNoBusy(cs);
176 val = 256 * ReadReg(cs, HFCD_DATA, reg | HFCB_Z_HIGH);
177 WaitNoBusy(cs);
178 val += ReadReg(cs, HFCD_DATA, reg | HFCB_Z_LOW);
179 return (val);
180 }
181
182 static struct sk_buff
hfc_empty_fifo(struct BCState * bcs,int count)183 *hfc_empty_fifo(struct BCState *bcs, int count)
184 {
185 u_char *ptr;
186 struct sk_buff *skb;
187 struct IsdnCardState *cs = bcs->cs;
188 int idx;
189 int chksum;
190 u_char stat, cip;
191
192 if ((cs->debug & L1_DEB_HSCX) && !(cs->debug & L1_DEB_HSCX_FIFO))
193 debugl1(cs, "hfc_empty_fifo");
194 idx = 0;
195 if (count > HSCX_BUFMAX + 3) {
196 if (cs->debug & L1_DEB_WARN)
197 debugl1(cs, "hfc_empty_fifo: incoming packet too large");
198 cip = HFCB_FIFO | HFCB_FIFO_OUT | HFCB_REC | HFCB_CHANNEL(bcs->channel);
199 while (idx++ < count) {
200 WaitNoBusy(cs);
201 ReadReg(cs, HFCD_DATA_NODEB, cip);
202 }
203 skb = NULL;
204 } else if (count < 4) {
205 if (cs->debug & L1_DEB_WARN)
206 debugl1(cs, "hfc_empty_fifo: incoming packet too small");
207 cip = HFCB_FIFO | HFCB_FIFO_OUT | HFCB_REC | HFCB_CHANNEL(bcs->channel);
208 #ifdef ERROR_STATISTIC
209 bcs->err_inv++;
210 #endif
211 while ((idx++ < count) && WaitNoBusy(cs))
212 ReadReg(cs, HFCD_DATA_NODEB, cip);
213 skb = NULL;
214 } else if (!(skb = dev_alloc_skb(count - 3)))
215 printk(KERN_WARNING "HFC: receive out of memory\n");
216 else {
217 ptr = skb_put(skb, count - 3);
218 idx = 0;
219 cip = HFCB_FIFO | HFCB_FIFO_OUT | HFCB_REC | HFCB_CHANNEL(bcs->channel);
220 while (idx < (count - 3)) {
221 if (!WaitNoBusy(cs))
222 break;
223 *ptr = ReadReg(cs, HFCD_DATA_NODEB, cip);
224 ptr++;
225 idx++;
226 }
227 if (idx != count - 3) {
228 debugl1(cs, "RFIFO BUSY error");
229 printk(KERN_WARNING "HFC FIFO channel %d BUSY Error\n", bcs->channel);
230 dev_kfree_skb_irq(skb);
231 skb = NULL;
232 } else {
233 WaitNoBusy(cs);
234 chksum = (ReadReg(cs, HFCD_DATA, cip) << 8);
235 WaitNoBusy(cs);
236 chksum += ReadReg(cs, HFCD_DATA, cip);
237 WaitNoBusy(cs);
238 stat = ReadReg(cs, HFCD_DATA, cip);
239 if (cs->debug & L1_DEB_HSCX)
240 debugl1(cs, "hfc_empty_fifo %d chksum %x stat %x",
241 bcs->channel, chksum, stat);
242 if (stat) {
243 debugl1(cs, "FIFO CRC error");
244 dev_kfree_skb_irq(skb);
245 skb = NULL;
246 #ifdef ERROR_STATISTIC
247 bcs->err_crc++;
248 #endif
249 }
250 }
251 }
252 WaitForBusy(cs);
253 WaitNoBusy(cs);
254 stat = ReadReg(cs, HFCD_DATA, HFCB_FIFO | HFCB_F2_INC |
255 HFCB_REC | HFCB_CHANNEL(bcs->channel));
256 WaitForBusy(cs);
257 return (skb);
258 }
259
260 static void
hfc_fill_fifo(struct BCState * bcs)261 hfc_fill_fifo(struct BCState *bcs)
262 {
263 struct IsdnCardState *cs = bcs->cs;
264 int idx, fcnt;
265 int count;
266 u_char cip;
267
268 if (!bcs->tx_skb)
269 return;
270 if (bcs->tx_skb->len <= 0)
271 return;
272 SelFiFo(cs, HFCB_SEND | HFCB_CHANNEL(bcs->channel));
273 cip = HFCB_FIFO | HFCB_F1 | HFCB_SEND | HFCB_CHANNEL(bcs->channel);
274 WaitNoBusy(cs);
275 bcs->hw.hfc.f1 = ReadReg(cs, HFCD_DATA, cip);
276 WaitNoBusy(cs);
277 cip = HFCB_FIFO | HFCB_F2 | HFCB_SEND | HFCB_CHANNEL(bcs->channel);
278 WaitNoBusy(cs);
279 bcs->hw.hfc.f2 = ReadReg(cs, HFCD_DATA, cip);
280 bcs->hw.hfc.send[bcs->hw.hfc.f1] = ReadZReg(cs, HFCB_FIFO | HFCB_Z1 | HFCB_SEND | HFCB_CHANNEL(bcs->channel));
281 if (cs->debug & L1_DEB_HSCX)
282 debugl1(cs, "hfc_fill_fifo %d f1(%d) f2(%d) z1(%x)",
283 bcs->channel, bcs->hw.hfc.f1, bcs->hw.hfc.f2,
284 bcs->hw.hfc.send[bcs->hw.hfc.f1]);
285 fcnt = bcs->hw.hfc.f1 - bcs->hw.hfc.f2;
286 if (fcnt < 0)
287 fcnt += 32;
288 if (fcnt > 30) {
289 if (cs->debug & L1_DEB_HSCX)
290 debugl1(cs, "hfc_fill_fifo more as 30 frames");
291 return;
292 }
293 count = GetFreeFifoBytes_B(bcs);
294 if (cs->debug & L1_DEB_HSCX)
295 debugl1(cs, "hfc_fill_fifo %d count(%u/%d),%lx",
296 bcs->channel, bcs->tx_skb->len,
297 count, current->state);
298 if (count < bcs->tx_skb->len) {
299 if (cs->debug & L1_DEB_HSCX)
300 debugl1(cs, "hfc_fill_fifo no fifo mem");
301 return;
302 }
303 cip = HFCB_FIFO | HFCB_FIFO_IN | HFCB_SEND | HFCB_CHANNEL(bcs->channel);
304 idx = 0;
305 WaitForBusy(cs);
306 WaitNoBusy(cs);
307 WriteReg(cs, HFCD_DATA_NODEB, cip, bcs->tx_skb->data[idx++]);
308 while (idx < bcs->tx_skb->len) {
309 if (!WaitNoBusy(cs))
310 break;
311 WriteReg(cs, HFCD_DATA_NODEB, cip, bcs->tx_skb->data[idx]);
312 idx++;
313 }
314 if (idx != bcs->tx_skb->len) {
315 debugl1(cs, "FIFO Send BUSY error");
316 printk(KERN_WARNING "HFC S FIFO channel %d BUSY Error\n", bcs->channel);
317 } else {
318 bcs->tx_cnt -= bcs->tx_skb->len;
319 if (test_bit(FLG_LLI_L1WAKEUP, &bcs->st->lli.flag) &&
320 (PACKET_NOACK != bcs->tx_skb->pkt_type)) {
321 u_long flags;
322 spin_lock_irqsave(&bcs->aclock, flags);
323 bcs->ackcnt += bcs->tx_skb->len;
324 spin_unlock_irqrestore(&bcs->aclock, flags);
325 schedule_event(bcs, B_ACKPENDING);
326 }
327 dev_kfree_skb_any(bcs->tx_skb);
328 bcs->tx_skb = NULL;
329 }
330 WaitForBusy(cs);
331 WaitNoBusy(cs);
332 ReadReg(cs, HFCD_DATA, HFCB_FIFO | HFCB_F1_INC | HFCB_SEND | HFCB_CHANNEL(bcs->channel));
333 WaitForBusy(cs);
334 test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
335 return;
336 }
337
338 static void
hfc_send_data(struct BCState * bcs)339 hfc_send_data(struct BCState *bcs)
340 {
341 struct IsdnCardState *cs = bcs->cs;
342
343 if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
344 hfc_fill_fifo(bcs);
345 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
346 } else
347 debugl1(cs, "send_data %d blocked", bcs->channel);
348 }
349
350 static void
main_rec_2bds0(struct BCState * bcs)351 main_rec_2bds0(struct BCState *bcs)
352 {
353 struct IsdnCardState *cs = bcs->cs;
354 int z1, z2, rcnt;
355 u_char f1, f2, cip;
356 int receive, count = 5;
357 struct sk_buff *skb;
358
359 Begin:
360 count--;
361 if (test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
362 debugl1(cs, "rec_data %d blocked", bcs->channel);
363 return;
364 }
365 SelFiFo(cs, HFCB_REC | HFCB_CHANNEL(bcs->channel));
366 cip = HFCB_FIFO | HFCB_F1 | HFCB_REC | HFCB_CHANNEL(bcs->channel);
367 WaitNoBusy(cs);
368 f1 = ReadReg(cs, HFCD_DATA, cip);
369 cip = HFCB_FIFO | HFCB_F2 | HFCB_REC | HFCB_CHANNEL(bcs->channel);
370 WaitNoBusy(cs);
371 f2 = ReadReg(cs, HFCD_DATA, cip);
372 if (f1 != f2) {
373 if (cs->debug & L1_DEB_HSCX)
374 debugl1(cs, "hfc rec %d f1(%d) f2(%d)",
375 bcs->channel, f1, f2);
376 z1 = ReadZReg(cs, HFCB_FIFO | HFCB_Z1 | HFCB_REC | HFCB_CHANNEL(bcs->channel));
377 z2 = ReadZReg(cs, HFCB_FIFO | HFCB_Z2 | HFCB_REC | HFCB_CHANNEL(bcs->channel));
378 rcnt = z1 - z2;
379 if (rcnt < 0)
380 rcnt += cs->hw.hfcD.bfifosize;
381 rcnt++;
382 if (cs->debug & L1_DEB_HSCX)
383 debugl1(cs, "hfc rec %d z1(%x) z2(%x) cnt(%d)",
384 bcs->channel, z1, z2, rcnt);
385 if ((skb = hfc_empty_fifo(bcs, rcnt))) {
386 skb_queue_tail(&bcs->rqueue, skb);
387 schedule_event(bcs, B_RCVBUFREADY);
388 }
389 rcnt = f1 - f2;
390 if (rcnt < 0)
391 rcnt += 32;
392 if (rcnt > 1)
393 receive = 1;
394 else
395 receive = 0;
396 } else
397 receive = 0;
398 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
399 if (count && receive)
400 goto Begin;
401 return;
402 }
403
404 static void
mode_2bs0(struct BCState * bcs,int mode,int bc)405 mode_2bs0(struct BCState *bcs, int mode, int bc)
406 {
407 struct IsdnCardState *cs = bcs->cs;
408
409 if (cs->debug & L1_DEB_HSCX)
410 debugl1(cs, "HFCD bchannel mode %d bchan %d/%d",
411 mode, bc, bcs->channel);
412 bcs->mode = mode;
413 bcs->channel = bc;
414 switch (mode) {
415 case (L1_MODE_NULL):
416 if (bc) {
417 cs->hw.hfcD.conn |= 0x18;
418 cs->hw.hfcD.sctrl &= ~SCTRL_B2_ENA;
419 } else {
420 cs->hw.hfcD.conn |= 0x3;
421 cs->hw.hfcD.sctrl &= ~SCTRL_B1_ENA;
422 }
423 break;
424 case (L1_MODE_TRANS):
425 if (bc) {
426 cs->hw.hfcD.ctmt |= 2;
427 cs->hw.hfcD.conn &= ~0x18;
428 cs->hw.hfcD.sctrl |= SCTRL_B2_ENA;
429 } else {
430 cs->hw.hfcD.ctmt |= 1;
431 cs->hw.hfcD.conn &= ~0x3;
432 cs->hw.hfcD.sctrl |= SCTRL_B1_ENA;
433 }
434 break;
435 case (L1_MODE_HDLC):
436 if (bc) {
437 cs->hw.hfcD.ctmt &= ~2;
438 cs->hw.hfcD.conn &= ~0x18;
439 cs->hw.hfcD.sctrl |= SCTRL_B2_ENA;
440 } else {
441 cs->hw.hfcD.ctmt &= ~1;
442 cs->hw.hfcD.conn &= ~0x3;
443 cs->hw.hfcD.sctrl |= SCTRL_B1_ENA;
444 }
445 break;
446 }
447 WriteReg(cs, HFCD_DATA, HFCD_SCTRL, cs->hw.hfcD.sctrl);
448 WriteReg(cs, HFCD_DATA, HFCD_CTMT, cs->hw.hfcD.ctmt);
449 WriteReg(cs, HFCD_DATA, HFCD_CONN, cs->hw.hfcD.conn);
450 }
451
452 static void
hfc_l2l1(struct PStack * st,int pr,void * arg)453 hfc_l2l1(struct PStack *st, int pr, void *arg)
454 {
455 struct BCState *bcs = st->l1.bcs;
456 struct sk_buff *skb = arg;
457 u_long flags;
458
459 switch (pr) {
460 case (PH_DATA | REQUEST):
461 spin_lock_irqsave(&bcs->cs->lock, flags);
462 if (bcs->tx_skb) {
463 skb_queue_tail(&bcs->squeue, skb);
464 } else {
465 bcs->tx_skb = skb;
466 // test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
467 bcs->cs->BC_Send_Data(bcs);
468 }
469 spin_unlock_irqrestore(&bcs->cs->lock, flags);
470 break;
471 case (PH_PULL | INDICATION):
472 spin_lock_irqsave(&bcs->cs->lock, flags);
473 if (bcs->tx_skb) {
474 printk(KERN_WARNING "hfc_l2l1: this shouldn't happen\n");
475 } else {
476 // test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
477 bcs->tx_skb = skb;
478 bcs->cs->BC_Send_Data(bcs);
479 }
480 spin_unlock_irqrestore(&bcs->cs->lock, flags);
481 break;
482 case (PH_PULL | REQUEST):
483 if (!bcs->tx_skb) {
484 test_and_clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
485 st->l1.l1l2(st, PH_PULL | CONFIRM, NULL);
486 } else
487 test_and_set_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
488 break;
489 case (PH_ACTIVATE | REQUEST):
490 spin_lock_irqsave(&bcs->cs->lock, flags);
491 test_and_set_bit(BC_FLG_ACTIV, &bcs->Flag);
492 mode_2bs0(bcs, st->l1.mode, st->l1.bc);
493 spin_unlock_irqrestore(&bcs->cs->lock, flags);
494 l1_msg_b(st, pr, arg);
495 break;
496 case (PH_DEACTIVATE | REQUEST):
497 l1_msg_b(st, pr, arg);
498 break;
499 case (PH_DEACTIVATE | CONFIRM):
500 spin_lock_irqsave(&bcs->cs->lock, flags);
501 test_and_clear_bit(BC_FLG_ACTIV, &bcs->Flag);
502 test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
503 mode_2bs0(bcs, 0, st->l1.bc);
504 spin_unlock_irqrestore(&bcs->cs->lock, flags);
505 st->l1.l1l2(st, PH_DEACTIVATE | CONFIRM, NULL);
506 break;
507 }
508 }
509
510 static void
close_2bs0(struct BCState * bcs)511 close_2bs0(struct BCState *bcs)
512 {
513 mode_2bs0(bcs, 0, bcs->channel);
514 if (test_and_clear_bit(BC_FLG_INIT, &bcs->Flag)) {
515 skb_queue_purge(&bcs->rqueue);
516 skb_queue_purge(&bcs->squeue);
517 if (bcs->tx_skb) {
518 dev_kfree_skb_any(bcs->tx_skb);
519 bcs->tx_skb = NULL;
520 test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
521 }
522 }
523 }
524
525 static int
open_hfcstate(struct IsdnCardState * cs,struct BCState * bcs)526 open_hfcstate(struct IsdnCardState *cs, struct BCState *bcs)
527 {
528 if (!test_and_set_bit(BC_FLG_INIT, &bcs->Flag)) {
529 skb_queue_head_init(&bcs->rqueue);
530 skb_queue_head_init(&bcs->squeue);
531 }
532 bcs->tx_skb = NULL;
533 test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
534 bcs->event = 0;
535 bcs->tx_cnt = 0;
536 return (0);
537 }
538
539 static int
setstack_2b(struct PStack * st,struct BCState * bcs)540 setstack_2b(struct PStack *st, struct BCState *bcs)
541 {
542 bcs->channel = st->l1.bc;
543 if (open_hfcstate(st->l1.hardware, bcs))
544 return (-1);
545 st->l1.bcs = bcs;
546 st->l2.l2l1 = hfc_l2l1;
547 setstack_manager(st);
548 bcs->st = st;
549 setstack_l1_B(st);
550 return (0);
551 }
552
553 static void
hfcd_bh(struct work_struct * work)554 hfcd_bh(struct work_struct *work)
555 {
556 struct IsdnCardState *cs =
557 container_of(work, struct IsdnCardState, tqueue);
558
559 if (test_and_clear_bit(D_L1STATECHANGE, &cs->event)) {
560 switch (cs->dc.hfcd.ph_state) {
561 case (0):
562 l1_msg(cs, HW_RESET | INDICATION, NULL);
563 break;
564 case (3):
565 l1_msg(cs, HW_DEACTIVATE | INDICATION, NULL);
566 break;
567 case (8):
568 l1_msg(cs, HW_RSYNC | INDICATION, NULL);
569 break;
570 case (6):
571 l1_msg(cs, HW_INFO2 | INDICATION, NULL);
572 break;
573 case (7):
574 l1_msg(cs, HW_INFO4_P8 | INDICATION, NULL);
575 break;
576 default:
577 break;
578 }
579 }
580 if (test_and_clear_bit(D_RCVBUFREADY, &cs->event))
581 DChannel_proc_rcv(cs);
582 if (test_and_clear_bit(D_XMTBUFREADY, &cs->event))
583 DChannel_proc_xmt(cs);
584 }
585
586 static
receive_dmsg(struct IsdnCardState * cs)587 int receive_dmsg(struct IsdnCardState *cs)
588 {
589 struct sk_buff *skb;
590 int idx;
591 int rcnt, z1, z2;
592 u_char stat, cip, f1, f2;
593 int chksum;
594 int count = 5;
595 u_char *ptr;
596
597 if (test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
598 debugl1(cs, "rec_dmsg blocked");
599 return (1);
600 }
601 SelFiFo(cs, 4 | HFCD_REC);
602 cip = HFCD_FIFO | HFCD_F1 | HFCD_REC;
603 WaitNoBusy(cs);
604 f1 = cs->readisac(cs, cip) & 0xf;
605 cip = HFCD_FIFO | HFCD_F2 | HFCD_REC;
606 WaitNoBusy(cs);
607 f2 = cs->readisac(cs, cip) & 0xf;
608 while ((f1 != f2) && count--) {
609 z1 = ReadZReg(cs, HFCD_FIFO | HFCD_Z1 | HFCD_REC);
610 z2 = ReadZReg(cs, HFCD_FIFO | HFCD_Z2 | HFCD_REC);
611 rcnt = z1 - z2;
612 if (rcnt < 0)
613 rcnt += cs->hw.hfcD.dfifosize;
614 rcnt++;
615 if (cs->debug & L1_DEB_ISAC)
616 debugl1(cs, "hfcd recd f1(%d) f2(%d) z1(%x) z2(%x) cnt(%d)",
617 f1, f2, z1, z2, rcnt);
618 idx = 0;
619 cip = HFCD_FIFO | HFCD_FIFO_OUT | HFCD_REC;
620 if (rcnt > MAX_DFRAME_LEN + 3) {
621 if (cs->debug & L1_DEB_WARN)
622 debugl1(cs, "empty_fifo d: incoming packet too large");
623 while (idx < rcnt) {
624 if (!(WaitNoBusy(cs)))
625 break;
626 ReadReg(cs, HFCD_DATA_NODEB, cip);
627 idx++;
628 }
629 } else if (rcnt < 4) {
630 if (cs->debug & L1_DEB_WARN)
631 debugl1(cs, "empty_fifo d: incoming packet too small");
632 while ((idx++ < rcnt) && WaitNoBusy(cs))
633 ReadReg(cs, HFCD_DATA_NODEB, cip);
634 } else if ((skb = dev_alloc_skb(rcnt - 3))) {
635 ptr = skb_put(skb, rcnt - 3);
636 while (idx < (rcnt - 3)) {
637 if (!(WaitNoBusy(cs)))
638 break;
639 *ptr = ReadReg(cs, HFCD_DATA_NODEB, cip);
640 idx++;
641 ptr++;
642 }
643 if (idx != (rcnt - 3)) {
644 debugl1(cs, "RFIFO D BUSY error");
645 printk(KERN_WARNING "HFC DFIFO channel BUSY Error\n");
646 dev_kfree_skb_irq(skb);
647 skb = NULL;
648 #ifdef ERROR_STATISTIC
649 cs->err_rx++;
650 #endif
651 } else {
652 WaitNoBusy(cs);
653 chksum = (ReadReg(cs, HFCD_DATA, cip) << 8);
654 WaitNoBusy(cs);
655 chksum += ReadReg(cs, HFCD_DATA, cip);
656 WaitNoBusy(cs);
657 stat = ReadReg(cs, HFCD_DATA, cip);
658 if (cs->debug & L1_DEB_ISAC)
659 debugl1(cs, "empty_dfifo chksum %x stat %x",
660 chksum, stat);
661 if (stat) {
662 debugl1(cs, "FIFO CRC error");
663 dev_kfree_skb_irq(skb);
664 skb = NULL;
665 #ifdef ERROR_STATISTIC
666 cs->err_crc++;
667 #endif
668 } else {
669 skb_queue_tail(&cs->rq, skb);
670 schedule_event(cs, D_RCVBUFREADY);
671 }
672 }
673 } else
674 printk(KERN_WARNING "HFC: D receive out of memory\n");
675 WaitForBusy(cs);
676 cip = HFCD_FIFO | HFCD_F2_INC | HFCD_REC;
677 WaitNoBusy(cs);
678 stat = ReadReg(cs, HFCD_DATA, cip);
679 WaitForBusy(cs);
680 cip = HFCD_FIFO | HFCD_F2 | HFCD_REC;
681 WaitNoBusy(cs);
682 f2 = cs->readisac(cs, cip) & 0xf;
683 }
684 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
685 return (1);
686 }
687
688 static void
hfc_fill_dfifo(struct IsdnCardState * cs)689 hfc_fill_dfifo(struct IsdnCardState *cs)
690 {
691 int idx, fcnt;
692 int count;
693 u_char cip;
694
695 if (!cs->tx_skb)
696 return;
697 if (cs->tx_skb->len <= 0)
698 return;
699
700 SelFiFo(cs, 4 | HFCD_SEND);
701 cip = HFCD_FIFO | HFCD_F1 | HFCD_SEND;
702 WaitNoBusy(cs);
703 cs->hw.hfcD.f1 = ReadReg(cs, HFCD_DATA, cip) & 0xf;
704 WaitNoBusy(cs);
705 cip = HFCD_FIFO | HFCD_F2 | HFCD_SEND;
706 cs->hw.hfcD.f2 = ReadReg(cs, HFCD_DATA, cip) & 0xf;
707 cs->hw.hfcD.send[cs->hw.hfcD.f1] = ReadZReg(cs, HFCD_FIFO | HFCD_Z1 | HFCD_SEND);
708 if (cs->debug & L1_DEB_ISAC)
709 debugl1(cs, "hfc_fill_Dfifo f1(%d) f2(%d) z1(%x)",
710 cs->hw.hfcD.f1, cs->hw.hfcD.f2,
711 cs->hw.hfcD.send[cs->hw.hfcD.f1]);
712 fcnt = cs->hw.hfcD.f1 - cs->hw.hfcD.f2;
713 if (fcnt < 0)
714 fcnt += 16;
715 if (fcnt > 14) {
716 if (cs->debug & L1_DEB_HSCX)
717 debugl1(cs, "hfc_fill_Dfifo more as 14 frames");
718 return;
719 }
720 count = GetFreeFifoBytes_D(cs);
721 if (cs->debug & L1_DEB_ISAC)
722 debugl1(cs, "hfc_fill_Dfifo count(%u/%d)",
723 cs->tx_skb->len, count);
724 if (count < cs->tx_skb->len) {
725 if (cs->debug & L1_DEB_ISAC)
726 debugl1(cs, "hfc_fill_Dfifo no fifo mem");
727 return;
728 }
729 cip = HFCD_FIFO | HFCD_FIFO_IN | HFCD_SEND;
730 idx = 0;
731 WaitForBusy(cs);
732 WaitNoBusy(cs);
733 WriteReg(cs, HFCD_DATA_NODEB, cip, cs->tx_skb->data[idx++]);
734 while (idx < cs->tx_skb->len) {
735 if (!(WaitNoBusy(cs)))
736 break;
737 WriteReg(cs, HFCD_DATA_NODEB, cip, cs->tx_skb->data[idx]);
738 idx++;
739 }
740 if (idx != cs->tx_skb->len) {
741 debugl1(cs, "DFIFO Send BUSY error");
742 printk(KERN_WARNING "HFC S DFIFO channel BUSY Error\n");
743 }
744 WaitForBusy(cs);
745 WaitNoBusy(cs);
746 ReadReg(cs, HFCD_DATA, HFCD_FIFO | HFCD_F1_INC | HFCD_SEND);
747 dev_kfree_skb_any(cs->tx_skb);
748 cs->tx_skb = NULL;
749 WaitForBusy(cs);
750 return;
751 }
752
753 static
Sel_BCS(struct IsdnCardState * cs,int channel)754 struct BCState *Sel_BCS(struct IsdnCardState *cs, int channel)
755 {
756 if (cs->bcs[0].mode && (cs->bcs[0].channel == channel))
757 return (&cs->bcs[0]);
758 else if (cs->bcs[1].mode && (cs->bcs[1].channel == channel))
759 return (&cs->bcs[1]);
760 else
761 return (NULL);
762 }
763
764 void
hfc2bds0_interrupt(struct IsdnCardState * cs,u_char val)765 hfc2bds0_interrupt(struct IsdnCardState *cs, u_char val)
766 {
767 u_char exval;
768 struct BCState *bcs;
769 int count = 15;
770
771 if (cs->debug & L1_DEB_ISAC)
772 debugl1(cs, "HFCD irq %x %s", val,
773 test_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags) ?
774 "locked" : "unlocked");
775 val &= cs->hw.hfcD.int_m1;
776 if (val & 0x40) { /* TE state machine irq */
777 exval = cs->readisac(cs, HFCD_STATES) & 0xf;
778 if (cs->debug & L1_DEB_ISAC)
779 debugl1(cs, "ph_state chg %d->%d", cs->dc.hfcd.ph_state,
780 exval);
781 cs->dc.hfcd.ph_state = exval;
782 schedule_event(cs, D_L1STATECHANGE);
783 val &= ~0x40;
784 }
785 while (val) {
786 if (test_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
787 cs->hw.hfcD.int_s1 |= val;
788 return;
789 }
790 if (cs->hw.hfcD.int_s1 & 0x18) {
791 exval = val;
792 val = cs->hw.hfcD.int_s1;
793 cs->hw.hfcD.int_s1 = exval;
794 }
795 if (val & 0x08) {
796 if (!(bcs = Sel_BCS(cs, 0))) {
797 if (cs->debug)
798 debugl1(cs, "hfcd spurious 0x08 IRQ");
799 } else
800 main_rec_2bds0(bcs);
801 }
802 if (val & 0x10) {
803 if (!(bcs = Sel_BCS(cs, 1))) {
804 if (cs->debug)
805 debugl1(cs, "hfcd spurious 0x10 IRQ");
806 } else
807 main_rec_2bds0(bcs);
808 }
809 if (val & 0x01) {
810 if (!(bcs = Sel_BCS(cs, 0))) {
811 if (cs->debug)
812 debugl1(cs, "hfcd spurious 0x01 IRQ");
813 } else {
814 if (bcs->tx_skb) {
815 if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
816 hfc_fill_fifo(bcs);
817 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
818 } else
819 debugl1(cs, "fill_data %d blocked", bcs->channel);
820 } else {
821 if ((bcs->tx_skb = skb_dequeue(&bcs->squeue))) {
822 if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
823 hfc_fill_fifo(bcs);
824 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
825 } else
826 debugl1(cs, "fill_data %d blocked", bcs->channel);
827 } else {
828 schedule_event(bcs, B_XMTBUFREADY);
829 }
830 }
831 }
832 }
833 if (val & 0x02) {
834 if (!(bcs = Sel_BCS(cs, 1))) {
835 if (cs->debug)
836 debugl1(cs, "hfcd spurious 0x02 IRQ");
837 } else {
838 if (bcs->tx_skb) {
839 if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
840 hfc_fill_fifo(bcs);
841 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
842 } else
843 debugl1(cs, "fill_data %d blocked", bcs->channel);
844 } else {
845 if ((bcs->tx_skb = skb_dequeue(&bcs->squeue))) {
846 if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
847 hfc_fill_fifo(bcs);
848 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
849 } else
850 debugl1(cs, "fill_data %d blocked", bcs->channel);
851 } else {
852 schedule_event(bcs, B_XMTBUFREADY);
853 }
854 }
855 }
856 }
857 if (val & 0x20) { /* receive dframe */
858 receive_dmsg(cs);
859 }
860 if (val & 0x04) { /* dframe transmitted */
861 if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
862 del_timer(&cs->dbusytimer);
863 if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
864 schedule_event(cs, D_CLEARBUSY);
865 if (cs->tx_skb) {
866 if (cs->tx_skb->len) {
867 if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
868 hfc_fill_dfifo(cs);
869 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
870 } else {
871 debugl1(cs, "hfc_fill_dfifo irq blocked");
872 }
873 goto afterXPR;
874 } else {
875 dev_kfree_skb_irq(cs->tx_skb);
876 cs->tx_cnt = 0;
877 cs->tx_skb = NULL;
878 }
879 }
880 if ((cs->tx_skb = skb_dequeue(&cs->sq))) {
881 cs->tx_cnt = 0;
882 if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
883 hfc_fill_dfifo(cs);
884 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
885 } else {
886 debugl1(cs, "hfc_fill_dfifo irq blocked");
887 }
888 } else
889 schedule_event(cs, D_XMTBUFREADY);
890 }
891 afterXPR:
892 if (cs->hw.hfcD.int_s1 && count--) {
893 val = cs->hw.hfcD.int_s1;
894 cs->hw.hfcD.int_s1 = 0;
895 if (cs->debug & L1_DEB_ISAC)
896 debugl1(cs, "HFCD irq %x loop %d", val, 15-count);
897 } else
898 val = 0;
899 }
900 }
901
902 static void
HFCD_l1hw(struct PStack * st,int pr,void * arg)903 HFCD_l1hw(struct PStack *st, int pr, void *arg)
904 {
905 struct IsdnCardState *cs = (struct IsdnCardState *) st->l1.hardware;
906 struct sk_buff *skb = arg;
907 u_long flags;
908
909 switch (pr) {
910 case (PH_DATA | REQUEST):
911 if (cs->debug & DEB_DLOG_HEX)
912 LogFrame(cs, skb->data, skb->len);
913 if (cs->debug & DEB_DLOG_VERBOSE)
914 dlogframe(cs, skb, 0);
915 spin_lock_irqsave(&cs->lock, flags);
916 if (cs->tx_skb) {
917 skb_queue_tail(&cs->sq, skb);
918 #ifdef L2FRAME_DEBUG /* psa */
919 if (cs->debug & L1_DEB_LAPD)
920 Logl2Frame(cs, skb, "PH_DATA Queued", 0);
921 #endif
922 } else {
923 cs->tx_skb = skb;
924 cs->tx_cnt = 0;
925 #ifdef L2FRAME_DEBUG /* psa */
926 if (cs->debug & L1_DEB_LAPD)
927 Logl2Frame(cs, skb, "PH_DATA", 0);
928 #endif
929 if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
930 hfc_fill_dfifo(cs);
931 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
932 } else
933 debugl1(cs, "hfc_fill_dfifo blocked");
934
935 }
936 spin_unlock_irqrestore(&cs->lock, flags);
937 break;
938 case (PH_PULL | INDICATION):
939 spin_lock_irqsave(&cs->lock, flags);
940 if (cs->tx_skb) {
941 if (cs->debug & L1_DEB_WARN)
942 debugl1(cs, " l2l1 tx_skb exist this shouldn't happen");
943 skb_queue_tail(&cs->sq, skb);
944 spin_unlock_irqrestore(&cs->lock, flags);
945 break;
946 }
947 if (cs->debug & DEB_DLOG_HEX)
948 LogFrame(cs, skb->data, skb->len);
949 if (cs->debug & DEB_DLOG_VERBOSE)
950 dlogframe(cs, skb, 0);
951 cs->tx_skb = skb;
952 cs->tx_cnt = 0;
953 #ifdef L2FRAME_DEBUG /* psa */
954 if (cs->debug & L1_DEB_LAPD)
955 Logl2Frame(cs, skb, "PH_DATA_PULLED", 0);
956 #endif
957 if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
958 hfc_fill_dfifo(cs);
959 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
960 } else
961 debugl1(cs, "hfc_fill_dfifo blocked");
962 spin_unlock_irqrestore(&cs->lock, flags);
963 break;
964 case (PH_PULL | REQUEST):
965 #ifdef L2FRAME_DEBUG /* psa */
966 if (cs->debug & L1_DEB_LAPD)
967 debugl1(cs, "-> PH_REQUEST_PULL");
968 #endif
969 if (!cs->tx_skb) {
970 test_and_clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
971 st->l1.l1l2(st, PH_PULL | CONFIRM, NULL);
972 } else
973 test_and_set_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
974 break;
975 case (HW_RESET | REQUEST):
976 spin_lock_irqsave(&cs->lock, flags);
977 cs->writeisac(cs, HFCD_STATES, HFCD_LOAD_STATE | 3); /* HFC ST 3 */
978 udelay(6);
979 cs->writeisac(cs, HFCD_STATES, 3); /* HFC ST 2 */
980 cs->hw.hfcD.mst_m |= HFCD_MASTER;
981 cs->writeisac(cs, HFCD_MST_MODE, cs->hw.hfcD.mst_m);
982 cs->writeisac(cs, HFCD_STATES, HFCD_ACTIVATE | HFCD_DO_ACTION);
983 spin_unlock_irqrestore(&cs->lock, flags);
984 l1_msg(cs, HW_POWERUP | CONFIRM, NULL);
985 break;
986 case (HW_ENABLE | REQUEST):
987 spin_lock_irqsave(&cs->lock, flags);
988 cs->writeisac(cs, HFCD_STATES, HFCD_ACTIVATE | HFCD_DO_ACTION);
989 spin_unlock_irqrestore(&cs->lock, flags);
990 break;
991 case (HW_DEACTIVATE | REQUEST):
992 spin_lock_irqsave(&cs->lock, flags);
993 cs->hw.hfcD.mst_m &= ~HFCD_MASTER;
994 cs->writeisac(cs, HFCD_MST_MODE, cs->hw.hfcD.mst_m);
995 spin_unlock_irqrestore(&cs->lock, flags);
996 break;
997 case (HW_INFO3 | REQUEST):
998 spin_lock_irqsave(&cs->lock, flags);
999 cs->hw.hfcD.mst_m |= HFCD_MASTER;
1000 cs->writeisac(cs, HFCD_MST_MODE, cs->hw.hfcD.mst_m);
1001 spin_unlock_irqrestore(&cs->lock, flags);
1002 break;
1003 default:
1004 if (cs->debug & L1_DEB_WARN)
1005 debugl1(cs, "hfcd_l1hw unknown pr %4x", pr);
1006 break;
1007 }
1008 }
1009
1010 static void
setstack_hfcd(struct PStack * st,struct IsdnCardState * cs)1011 setstack_hfcd(struct PStack *st, struct IsdnCardState *cs)
1012 {
1013 st->l1.l1hw = HFCD_l1hw;
1014 }
1015
1016 static void
hfc_dbusy_timer(struct timer_list * t)1017 hfc_dbusy_timer(struct timer_list *t)
1018 {
1019 }
1020
1021 static unsigned int
init_send_hfcd(int cnt)1022 *init_send_hfcd(int cnt)
1023 {
1024 int i;
1025 unsigned *send;
1026
1027 if (!(send = kmalloc_array(cnt, sizeof(unsigned int), GFP_ATOMIC))) {
1028 printk(KERN_WARNING
1029 "HiSax: No memory for hfcd.send\n");
1030 return (NULL);
1031 }
1032 for (i = 0; i < cnt; i++)
1033 send[i] = 0x1fff;
1034 return (send);
1035 }
1036
1037 void
init2bds0(struct IsdnCardState * cs)1038 init2bds0(struct IsdnCardState *cs)
1039 {
1040 cs->setstack_d = setstack_hfcd;
1041 if (!cs->hw.hfcD.send)
1042 cs->hw.hfcD.send = init_send_hfcd(16);
1043 if (!cs->bcs[0].hw.hfc.send)
1044 cs->bcs[0].hw.hfc.send = init_send_hfcd(32);
1045 if (!cs->bcs[1].hw.hfc.send)
1046 cs->bcs[1].hw.hfc.send = init_send_hfcd(32);
1047 cs->BC_Send_Data = &hfc_send_data;
1048 cs->bcs[0].BC_SetStack = setstack_2b;
1049 cs->bcs[1].BC_SetStack = setstack_2b;
1050 cs->bcs[0].BC_Close = close_2bs0;
1051 cs->bcs[1].BC_Close = close_2bs0;
1052 mode_2bs0(cs->bcs, 0, 0);
1053 mode_2bs0(cs->bcs + 1, 0, 1);
1054 }
1055
1056 void
release2bds0(struct IsdnCardState * cs)1057 release2bds0(struct IsdnCardState *cs)
1058 {
1059 kfree(cs->bcs[0].hw.hfc.send);
1060 cs->bcs[0].hw.hfc.send = NULL;
1061 kfree(cs->bcs[1].hw.hfc.send);
1062 cs->bcs[1].hw.hfc.send = NULL;
1063 kfree(cs->hw.hfcD.send);
1064 cs->hw.hfcD.send = NULL;
1065 }
1066
1067 void
set_cs_func(struct IsdnCardState * cs)1068 set_cs_func(struct IsdnCardState *cs)
1069 {
1070 cs->readisac = &readreghfcd;
1071 cs->writeisac = &writereghfcd;
1072 cs->readisacfifo = &dummyf;
1073 cs->writeisacfifo = &dummyf;
1074 cs->BC_Read_Reg = &ReadReg;
1075 cs->BC_Write_Reg = &WriteReg;
1076 timer_setup(&cs->dbusytimer, hfc_dbusy_timer, 0);
1077 INIT_WORK(&cs->tqueue, hfcd_bh);
1078 }
1079