Merge branch 'master'
[linux-2.6] / drivers / isdn / hisax / hfc_2bds0.c
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 "hisax.h"
15 #include "hfc_2bds0.h"
16 #include "isdnl1.h"
17 #include <linux/interrupt.h>
18 /*
19 #define KDEBUG_DEF
20 #include "kdebug.h"
21 */
22
23 #define byteout(addr,val) outb(val,addr)
24 #define bytein(addr) inb(addr)
25
26 static void
27 dummyf(struct IsdnCardState *cs, u_char * data, int size)
28 {
29         printk(KERN_WARNING "HiSax: hfcd dummy fifo called\n");
30 }
31
32 static inline u_char
33 ReadReg(struct IsdnCardState *cs, int data, u_char reg)
34 {
35         register u_char ret;
36
37         if (data) {
38                 if (cs->hw.hfcD.cip != reg) { 
39                         cs->hw.hfcD.cip = reg;
40                         byteout(cs->hw.hfcD.addr | 1, reg);
41                 }
42                 ret = bytein(cs->hw.hfcD.addr);
43 #ifdef HFC_REG_DEBUG
44                 if (cs->debug & L1_DEB_HSCX_FIFO && (data != 2))
45                         debugl1(cs, "t3c RD %02x %02x", reg, ret);
46 #endif
47         } else
48                 ret = bytein(cs->hw.hfcD.addr | 1);
49         return (ret);
50 }
51
52 static inline void
53 WriteReg(struct IsdnCardState *cs, int data, u_char reg, u_char value)
54 {
55         if (cs->hw.hfcD.cip != reg) { 
56                 cs->hw.hfcD.cip = reg;
57                 byteout(cs->hw.hfcD.addr | 1, reg);
58         }
59         if (data)
60                 byteout(cs->hw.hfcD.addr, value);
61 #ifdef HFC_REG_DEBUG
62         if (cs->debug & L1_DEB_HSCX_FIFO && (data != HFCD_DATA_NODEB))
63                 debugl1(cs, "t3c W%c %02x %02x", data ? 'D' : 'C', reg, value);
64 #endif
65 }
66
67 /* Interface functions */
68
69 static u_char
70 readreghfcd(struct IsdnCardState *cs, u_char offset)
71 {
72         return(ReadReg(cs, HFCD_DATA, offset));
73 }
74
75 static void
76 writereghfcd(struct IsdnCardState *cs, u_char offset, u_char value)
77 {
78         WriteReg(cs, HFCD_DATA, offset, value);
79 }
80
81 static inline int
82 WaitForBusy(struct IsdnCardState *cs)
83 {
84         int to = 130;
85
86         while (!(ReadReg(cs, HFCD_DATA, HFCD_STAT) & HFCD_BUSY) && to) {
87                 udelay(1);
88                 to--;
89         }
90         if (!to)
91                 printk(KERN_WARNING "HiSax: WaitForBusy timeout\n");
92         return (to);
93 }
94
95 static inline int
96 WaitNoBusy(struct IsdnCardState *cs)
97 {
98         int to = 130;
99
100         while ((ReadReg(cs, HFCD_STATUS, HFCD_STATUS) & HFCD_BUSY) && to) {
101                 udelay(1);
102                 to--;
103         }
104         if (!to) 
105                 printk(KERN_WARNING "HiSax: WaitNoBusy timeout\n");
106         return (to);
107 }
108
109 static int
110 SelFiFo(struct IsdnCardState *cs, u_char FiFo)
111 {
112         u_char cip;
113
114         if (cs->hw.hfcD.fifo == FiFo)
115                 return(1);
116         switch(FiFo) {
117                 case 0: cip = HFCB_FIFO | HFCB_Z1 | HFCB_SEND | HFCB_B1;
118                         break;
119                 case 1: cip = HFCB_FIFO | HFCB_Z1 | HFCB_REC | HFCB_B1;
120                         break;
121                 case 2: cip = HFCB_FIFO | HFCB_Z1 | HFCB_SEND | HFCB_B2;
122                         break;
123                 case 3: cip = HFCB_FIFO | HFCB_Z1 | HFCB_REC | HFCB_B2;
124                         break;
125                 case 4: cip = HFCD_FIFO | HFCD_Z1 | HFCD_SEND;
126                         break;
127                 case 5: cip = HFCD_FIFO | HFCD_Z1 | HFCD_REC;
128                         break;
129                 default:
130                         debugl1(cs, "SelFiFo Error");
131                         return(0);
132         }
133         cs->hw.hfcD.fifo = FiFo;
134         WaitNoBusy(cs);
135         cs->BC_Write_Reg(cs, HFCD_DATA, cip, 0);
136         WaitForBusy(cs);
137         return(2);
138 }
139
140 static int
141 GetFreeFifoBytes_B(struct BCState *bcs)
142 {
143         int s;
144
145         if (bcs->hw.hfc.f1 == bcs->hw.hfc.f2)
146                 return (bcs->cs->hw.hfcD.bfifosize);
147         s = bcs->hw.hfc.send[bcs->hw.hfc.f1] - bcs->hw.hfc.send[bcs->hw.hfc.f2];
148         if (s <= 0)
149                 s += bcs->cs->hw.hfcD.bfifosize;
150         s = bcs->cs->hw.hfcD.bfifosize - s;
151         return (s);
152 }
153
154 static int
155 GetFreeFifoBytes_D(struct IsdnCardState *cs)
156 {
157         int s;
158
159         if (cs->hw.hfcD.f1 == cs->hw.hfcD.f2)
160                 return (cs->hw.hfcD.dfifosize);
161         s = cs->hw.hfcD.send[cs->hw.hfcD.f1] - cs->hw.hfcD.send[cs->hw.hfcD.f2];
162         if (s <= 0)
163                 s += cs->hw.hfcD.dfifosize;
164         s = cs->hw.hfcD.dfifosize - s;
165         return (s);
166 }
167
168 static int
169 ReadZReg(struct IsdnCardState *cs, u_char reg)
170 {
171         int val;
172
173         WaitNoBusy(cs);
174         val = 256 * ReadReg(cs, HFCD_DATA, reg | HFCB_Z_HIGH);
175         WaitNoBusy(cs);
176         val += ReadReg(cs, HFCD_DATA, reg | HFCB_Z_LOW);
177         return (val);
178 }
179
180 static struct sk_buff
181 *hfc_empty_fifo(struct BCState *bcs, int count)
182 {
183         u_char *ptr;
184         struct sk_buff *skb;
185         struct IsdnCardState *cs = bcs->cs;
186         int idx;
187         int chksum;
188         u_char stat, cip;
189         
190         if ((cs->debug & L1_DEB_HSCX) && !(cs->debug & L1_DEB_HSCX_FIFO))
191                 debugl1(cs, "hfc_empty_fifo");
192         idx = 0;
193         if (count > HSCX_BUFMAX + 3) {
194                 if (cs->debug & L1_DEB_WARN)
195                         debugl1(cs, "hfc_empty_fifo: incoming packet too large");
196                 cip = HFCB_FIFO | HFCB_FIFO_OUT | HFCB_REC | HFCB_CHANNEL(bcs->channel);
197                 while (idx++ < count) {
198                         WaitNoBusy(cs);
199                         ReadReg(cs, HFCD_DATA_NODEB, cip);
200                 }
201                 skb = NULL;
202         } else if (count < 4) {
203                 if (cs->debug & L1_DEB_WARN)
204                         debugl1(cs, "hfc_empty_fifo: incoming packet too small");
205                 cip = HFCB_FIFO | HFCB_FIFO_OUT | HFCB_REC | HFCB_CHANNEL(bcs->channel);
206 #ifdef ERROR_STATISTIC
207                 bcs->err_inv++;
208 #endif
209                 while ((idx++ < count) && WaitNoBusy(cs))
210                         ReadReg(cs, HFCD_DATA_NODEB, cip);
211                 skb = NULL;
212         } else if (!(skb = dev_alloc_skb(count - 3)))
213                 printk(KERN_WARNING "HFC: receive out of memory\n");
214         else {
215                 ptr = skb_put(skb, count - 3);
216                 idx = 0;
217                 cip = HFCB_FIFO | HFCB_FIFO_OUT | HFCB_REC | HFCB_CHANNEL(bcs->channel);
218                 while (idx < (count - 3)) {
219                         if (!WaitNoBusy(cs))
220                                 break;
221                         *ptr = ReadReg(cs,  HFCD_DATA_NODEB, cip);
222                         ptr++;
223                         idx++;
224                 }
225                 if (idx != count - 3) {
226                         debugl1(cs, "RFIFO BUSY error");
227                         printk(KERN_WARNING "HFC FIFO channel %d BUSY Error\n", bcs->channel);
228                         dev_kfree_skb_irq(skb);
229                         skb = NULL;
230                 } else {
231                         WaitNoBusy(cs);
232                         chksum = (ReadReg(cs, HFCD_DATA, cip) << 8);
233                         WaitNoBusy(cs);
234                         chksum += ReadReg(cs, HFCD_DATA, cip);
235                         WaitNoBusy(cs);
236                         stat = ReadReg(cs, HFCD_DATA, cip);
237                         if (cs->debug & L1_DEB_HSCX)
238                                 debugl1(cs, "hfc_empty_fifo %d chksum %x stat %x",
239                                         bcs->channel, chksum, stat);
240                         if (stat) {
241                                 debugl1(cs, "FIFO CRC error");
242                                 dev_kfree_skb_irq(skb);
243                                 skb = NULL;
244 #ifdef ERROR_STATISTIC
245                                 bcs->err_crc++;
246 #endif
247                         }
248                 }
249         }
250         WaitForBusy(cs);
251         WaitNoBusy(cs);
252         stat = ReadReg(cs, HFCD_DATA, HFCB_FIFO | HFCB_F2_INC |
253                 HFCB_REC | HFCB_CHANNEL(bcs->channel));
254         WaitForBusy(cs);
255         return (skb);
256 }
257
258 static void
259 hfc_fill_fifo(struct BCState *bcs)
260 {
261         struct IsdnCardState *cs = bcs->cs;
262         int idx, fcnt;
263         int count;
264         u_char cip;
265
266         if (!bcs->tx_skb)
267                 return;
268         if (bcs->tx_skb->len <= 0)
269                 return;
270         SelFiFo(cs, HFCB_SEND | HFCB_CHANNEL(bcs->channel)); 
271         cip = HFCB_FIFO | HFCB_F1 | HFCB_SEND | HFCB_CHANNEL(bcs->channel);
272         WaitNoBusy(cs);
273         bcs->hw.hfc.f1 = ReadReg(cs, HFCD_DATA, cip);
274         WaitNoBusy(cs);
275         cip = HFCB_FIFO | HFCB_F2 | HFCB_SEND | HFCB_CHANNEL(bcs->channel);
276         WaitNoBusy(cs);
277         bcs->hw.hfc.f2 = ReadReg(cs, HFCD_DATA, cip);
278         bcs->hw.hfc.send[bcs->hw.hfc.f1] = ReadZReg(cs, HFCB_FIFO | HFCB_Z1 | HFCB_SEND | HFCB_CHANNEL(bcs->channel));
279         if (cs->debug & L1_DEB_HSCX)
280                 debugl1(cs, "hfc_fill_fifo %d f1(%d) f2(%d) z1(%x)",
281                         bcs->channel, bcs->hw.hfc.f1, bcs->hw.hfc.f2,
282                         bcs->hw.hfc.send[bcs->hw.hfc.f1]);
283         fcnt = bcs->hw.hfc.f1 - bcs->hw.hfc.f2;
284         if (fcnt < 0)
285                 fcnt += 32;
286         if (fcnt > 30) {
287                 if (cs->debug & L1_DEB_HSCX)
288                         debugl1(cs, "hfc_fill_fifo more as 30 frames");
289                 return;
290         }
291         count = GetFreeFifoBytes_B(bcs);
292         if (cs->debug & L1_DEB_HSCX)
293                 debugl1(cs, "hfc_fill_fifo %d count(%ld/%d),%lx",
294                         bcs->channel, bcs->tx_skb->len,
295                         count, current->state);
296         if (count < bcs->tx_skb->len) {
297                 if (cs->debug & L1_DEB_HSCX)
298                         debugl1(cs, "hfc_fill_fifo no fifo mem");
299                 return;
300         }
301         cip = HFCB_FIFO | HFCB_FIFO_IN | HFCB_SEND | HFCB_CHANNEL(bcs->channel);
302         idx = 0;
303         WaitForBusy(cs);
304         WaitNoBusy(cs);
305         WriteReg(cs, HFCD_DATA_NODEB, cip, bcs->tx_skb->data[idx++]);
306         while (idx < bcs->tx_skb->len) {
307                 if (!WaitNoBusy(cs))
308                         break;
309                 WriteReg(cs, HFCD_DATA_NODEB, cip, bcs->tx_skb->data[idx]);
310                 idx++;
311         }
312         if (idx != bcs->tx_skb->len) {
313                 debugl1(cs, "FIFO Send BUSY error");
314                 printk(KERN_WARNING "HFC S FIFO channel %d BUSY Error\n", bcs->channel);
315         } else {
316                 bcs->tx_cnt -= bcs->tx_skb->len;
317                 if (test_bit(FLG_LLI_L1WAKEUP,&bcs->st->lli.flag) &&
318                         (PACKET_NOACK != bcs->tx_skb->pkt_type)) {
319                         u_long  flags;
320                         spin_lock_irqsave(&bcs->aclock, flags);
321                         bcs->ackcnt += bcs->tx_skb->len;
322                         spin_unlock_irqrestore(&bcs->aclock, flags);
323                         schedule_event(bcs, B_ACKPENDING);
324                 }
325                 dev_kfree_skb_any(bcs->tx_skb);
326                 bcs->tx_skb = NULL;
327         }
328         WaitForBusy(cs);
329         WaitNoBusy(cs);
330         ReadReg(cs, HFCD_DATA, HFCB_FIFO | HFCB_F1_INC | HFCB_SEND | HFCB_CHANNEL(bcs->channel));
331         WaitForBusy(cs);
332         test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
333         return;
334 }
335
336 static void
337 hfc_send_data(struct BCState *bcs)
338 {
339         struct IsdnCardState *cs = bcs->cs;
340         
341         if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
342                 hfc_fill_fifo(bcs);
343                 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
344         } else
345                 debugl1(cs,"send_data %d blocked", bcs->channel);
346 }
347
348 static void
349 main_rec_2bds0(struct BCState *bcs)
350 {
351         struct IsdnCardState *cs = bcs->cs;
352         int z1, z2, rcnt;
353         u_char f1, f2, cip;
354         int receive, count = 5;
355         struct sk_buff *skb;
356
357     Begin:
358         count--;
359         if (test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
360                 debugl1(cs,"rec_data %d blocked", bcs->channel);
361                 return;
362         }
363         SelFiFo(cs, HFCB_REC | HFCB_CHANNEL(bcs->channel));
364         cip = HFCB_FIFO | HFCB_F1 | HFCB_REC | HFCB_CHANNEL(bcs->channel);
365         WaitNoBusy(cs);
366         f1 = ReadReg(cs, HFCD_DATA, cip);
367         cip = HFCB_FIFO | HFCB_F2 | HFCB_REC | HFCB_CHANNEL(bcs->channel);
368         WaitNoBusy(cs);
369         f2 = ReadReg(cs, HFCD_DATA, cip);
370         if (f1 != f2) {
371                 if (cs->debug & L1_DEB_HSCX)
372                         debugl1(cs, "hfc rec %d f1(%d) f2(%d)",
373                                 bcs->channel, f1, f2);
374                 z1 = ReadZReg(cs, HFCB_FIFO | HFCB_Z1 | HFCB_REC | HFCB_CHANNEL(bcs->channel));
375                 z2 = ReadZReg(cs, HFCB_FIFO | HFCB_Z2 | HFCB_REC | HFCB_CHANNEL(bcs->channel));
376                 rcnt = z1 - z2;
377                 if (rcnt < 0)
378                         rcnt += cs->hw.hfcD.bfifosize;
379                 rcnt++;
380                 if (cs->debug & L1_DEB_HSCX)
381                         debugl1(cs, "hfc rec %d z1(%x) z2(%x) cnt(%d)",
382                                 bcs->channel, z1, z2, rcnt);
383                 if ((skb = hfc_empty_fifo(bcs, rcnt))) {
384                         skb_queue_tail(&bcs->rqueue, skb);
385                         schedule_event(bcs, B_RCVBUFREADY);
386                 }
387                 rcnt = f1 -f2;
388                 if (rcnt<0)
389                         rcnt += 32;
390                 if (rcnt>1)
391                         receive = 1;
392                 else
393                         receive = 0;
394         } else
395                 receive = 0;
396         test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
397         if (count && receive)
398                 goto Begin;     
399         return;
400 }
401
402 static void
403 mode_2bs0(struct BCState *bcs, int mode, int bc)
404 {
405         struct IsdnCardState *cs = bcs->cs;
406
407         if (cs->debug & L1_DEB_HSCX)
408                 debugl1(cs, "HFCD bchannel mode %d bchan %d/%d",
409                         mode, bc, bcs->channel);
410         bcs->mode = mode;
411         bcs->channel = bc;
412         switch (mode) {
413                 case (L1_MODE_NULL):
414                         if (bc) {
415                                 cs->hw.hfcD.conn |= 0x18;
416                                 cs->hw.hfcD.sctrl &= ~SCTRL_B2_ENA;
417                         } else {
418                                 cs->hw.hfcD.conn |= 0x3;
419                                 cs->hw.hfcD.sctrl &= ~SCTRL_B1_ENA;
420                         }
421                         break;
422                 case (L1_MODE_TRANS):
423                         if (bc) {
424                                 cs->hw.hfcD.ctmt |= 2;
425                                 cs->hw.hfcD.conn &= ~0x18;
426                                 cs->hw.hfcD.sctrl |= SCTRL_B2_ENA;
427                         } else {
428                                 cs->hw.hfcD.ctmt |= 1;
429                                 cs->hw.hfcD.conn &= ~0x3;
430                                 cs->hw.hfcD.sctrl |= SCTRL_B1_ENA;
431                         }
432                         break;
433                 case (L1_MODE_HDLC):
434                         if (bc) {
435                                 cs->hw.hfcD.ctmt &= ~2;
436                                 cs->hw.hfcD.conn &= ~0x18;
437                                 cs->hw.hfcD.sctrl |= SCTRL_B2_ENA;
438                         } else {
439                                 cs->hw.hfcD.ctmt &= ~1;
440                                 cs->hw.hfcD.conn &= ~0x3;
441                                 cs->hw.hfcD.sctrl |= SCTRL_B1_ENA;
442                         }
443                         break;
444         }
445         WriteReg(cs, HFCD_DATA, HFCD_SCTRL, cs->hw.hfcD.sctrl);
446         WriteReg(cs, HFCD_DATA, HFCD_CTMT, cs->hw.hfcD.ctmt);
447         WriteReg(cs, HFCD_DATA, HFCD_CONN, cs->hw.hfcD.conn);
448 }
449
450 static void
451 hfc_l2l1(struct PStack *st, int pr, void *arg)
452 {
453         struct BCState *bcs = st->l1.bcs;
454         struct sk_buff *skb = arg;
455         u_long flags;
456
457         switch (pr) {
458                 case (PH_DATA | REQUEST):
459                         spin_lock_irqsave(&bcs->cs->lock, flags);
460                         if (bcs->tx_skb) {
461                                 skb_queue_tail(&bcs->squeue, skb);
462                         } else {
463                                 bcs->tx_skb = skb;
464 //                              test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
465                                 bcs->cs->BC_Send_Data(bcs);
466                         }
467                         spin_unlock_irqrestore(&bcs->cs->lock, flags);
468                         break;
469                 case (PH_PULL | INDICATION):
470                         spin_lock_irqsave(&bcs->cs->lock, flags);
471                         if (bcs->tx_skb) {
472                                 printk(KERN_WARNING "hfc_l2l1: this shouldn't happen\n");
473                         } else {
474 //                              test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
475                                 bcs->tx_skb = skb;
476                                 bcs->cs->BC_Send_Data(bcs);
477                         }
478                         spin_unlock_irqrestore(&bcs->cs->lock, flags);
479                         break;
480                 case (PH_PULL | REQUEST):
481                         if (!bcs->tx_skb) {
482                                 test_and_clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
483                                 st->l1.l1l2(st, PH_PULL | CONFIRM, NULL);
484                         } else
485                                 test_and_set_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
486                         break;
487                 case (PH_ACTIVATE | REQUEST):
488                         spin_lock_irqsave(&bcs->cs->lock, flags);
489                         test_and_set_bit(BC_FLG_ACTIV, &bcs->Flag);
490                         mode_2bs0(bcs, st->l1.mode, st->l1.bc);
491                         spin_unlock_irqrestore(&bcs->cs->lock, flags);
492                         l1_msg_b(st, pr, arg);
493                         break;
494                 case (PH_DEACTIVATE | REQUEST):
495                         l1_msg_b(st, pr, arg);
496                         break;
497                 case (PH_DEACTIVATE | CONFIRM):
498                         spin_lock_irqsave(&bcs->cs->lock, flags);
499                         test_and_clear_bit(BC_FLG_ACTIV, &bcs->Flag);
500                         test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
501                         mode_2bs0(bcs, 0, st->l1.bc);
502                         spin_unlock_irqrestore(&bcs->cs->lock, flags);
503                         st->l1.l1l2(st, PH_DEACTIVATE | CONFIRM, NULL);
504                         break;
505         }
506 }
507
508 static void
509 close_2bs0(struct BCState *bcs)
510 {
511         mode_2bs0(bcs, 0, bcs->channel);
512         if (test_and_clear_bit(BC_FLG_INIT, &bcs->Flag)) {
513                 skb_queue_purge(&bcs->rqueue);
514                 skb_queue_purge(&bcs->squeue);
515                 if (bcs->tx_skb) {
516                         dev_kfree_skb_any(bcs->tx_skb);
517                         bcs->tx_skb = NULL;
518                         test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
519                 }
520         }
521 }
522
523 static int
524 open_hfcstate(struct IsdnCardState *cs, struct BCState *bcs)
525 {
526         if (!test_and_set_bit(BC_FLG_INIT, &bcs->Flag)) {
527                 skb_queue_head_init(&bcs->rqueue);
528                 skb_queue_head_init(&bcs->squeue);
529         }
530         bcs->tx_skb = NULL;
531         test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
532         bcs->event = 0;
533         bcs->tx_cnt = 0;
534         return (0);
535 }
536
537 static int
538 setstack_2b(struct PStack *st, struct BCState *bcs)
539 {
540         bcs->channel = st->l1.bc;
541         if (open_hfcstate(st->l1.hardware, bcs))
542                 return (-1);
543         st->l1.bcs = bcs;
544         st->l2.l2l1 = hfc_l2l1;
545         setstack_manager(st);
546         bcs->st = st;
547         setstack_l1_B(st);
548         return (0);
549 }
550
551 static void
552 hfcd_bh(struct IsdnCardState *cs)
553 {
554         if (!cs)
555                 return;
556         if (test_and_clear_bit(D_L1STATECHANGE, &cs->event)) {
557                 switch (cs->dc.hfcd.ph_state) {
558                         case (0):
559                                 l1_msg(cs, HW_RESET | INDICATION, NULL);
560                                 break;
561                         case (3):
562                                 l1_msg(cs, HW_DEACTIVATE | INDICATION, NULL);
563                                 break;
564                         case (8):
565                                 l1_msg(cs, HW_RSYNC | INDICATION, NULL);
566                                 break;
567                         case (6):
568                                 l1_msg(cs, HW_INFO2 | INDICATION, NULL);
569                                 break;
570                         case (7):
571                                 l1_msg(cs, HW_INFO4_P8 | INDICATION, NULL);
572                                 break;
573                         default:
574                                 break;
575                 }
576         }
577         if (test_and_clear_bit(D_RCVBUFREADY, &cs->event))
578                 DChannel_proc_rcv(cs);
579         if (test_and_clear_bit(D_XMTBUFREADY, &cs->event))
580                 DChannel_proc_xmt(cs);
581 }
582
583 static
584 int receive_dmsg(struct IsdnCardState *cs)
585 {
586         struct sk_buff *skb;
587         int idx;
588         int rcnt, z1, z2;
589         u_char stat, cip, f1, f2;
590         int chksum;
591         int count=5;
592         u_char *ptr;
593
594         if (test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
595                 debugl1(cs, "rec_dmsg blocked");
596                 return(1);
597         }
598         SelFiFo(cs, 4 | HFCD_REC);
599         cip = HFCD_FIFO | HFCD_F1 | HFCD_REC;
600         WaitNoBusy(cs);
601         f1 = cs->readisac(cs, cip) & 0xf;
602         cip = HFCD_FIFO | HFCD_F2 | HFCD_REC;
603         WaitNoBusy(cs);
604         f2 = cs->readisac(cs, cip) & 0xf;
605         while ((f1 != f2) && count--) {
606                 z1 = ReadZReg(cs, HFCD_FIFO | HFCD_Z1 | HFCD_REC);
607                 z2 = ReadZReg(cs, HFCD_FIFO | HFCD_Z2 | HFCD_REC);
608                 rcnt = z1 - z2;
609                 if (rcnt < 0)
610                         rcnt += cs->hw.hfcD.dfifosize;
611                 rcnt++;
612                 if (cs->debug & L1_DEB_ISAC)
613                         debugl1(cs, "hfcd recd f1(%d) f2(%d) z1(%x) z2(%x) cnt(%d)",
614                                 f1, f2, z1, z2, rcnt);
615                 idx = 0;
616                 cip = HFCD_FIFO | HFCD_FIFO_OUT | HFCD_REC;
617                 if (rcnt > MAX_DFRAME_LEN + 3) {
618                         if (cs->debug & L1_DEB_WARN)
619                                 debugl1(cs, "empty_fifo d: incoming packet too large");
620                         while (idx < rcnt) {
621                                 if (!(WaitNoBusy(cs)))
622                                         break;
623                                 ReadReg(cs, HFCD_DATA_NODEB, cip);
624                                 idx++;
625                         }
626                 } else if (rcnt < 4) {
627                         if (cs->debug & L1_DEB_WARN)
628                                 debugl1(cs, "empty_fifo d: incoming packet too small");
629                         while ((idx++ < rcnt) && WaitNoBusy(cs))
630                                 ReadReg(cs, HFCD_DATA_NODEB, cip);
631                 } else if ((skb = dev_alloc_skb(rcnt - 3))) {
632                         ptr = skb_put(skb, rcnt - 3);
633                         while (idx < (rcnt - 3)) {
634                                 if (!(WaitNoBusy(cs)))
635                                         break;
636                                 *ptr = ReadReg(cs, HFCD_DATA_NODEB, cip);
637                                 idx++;
638                                 ptr++;
639                         }
640                         if (idx != (rcnt - 3)) {
641                                 debugl1(cs, "RFIFO D BUSY error");
642                                 printk(KERN_WARNING "HFC DFIFO channel BUSY Error\n");
643                                 dev_kfree_skb_irq(skb);
644                                 skb = NULL;
645 #ifdef ERROR_STATISTIC
646                                 cs->err_rx++;
647 #endif
648                         } else {
649                                 WaitNoBusy(cs);
650                                 chksum = (ReadReg(cs, HFCD_DATA, cip) << 8);
651                                 WaitNoBusy(cs);
652                                 chksum += ReadReg(cs, HFCD_DATA, cip);
653                                 WaitNoBusy(cs);
654                                 stat = ReadReg(cs, HFCD_DATA, cip);
655                                 if (cs->debug & L1_DEB_ISAC)
656                                         debugl1(cs, "empty_dfifo chksum %x stat %x",
657                                                 chksum, stat);
658                                 if (stat) {
659                                         debugl1(cs, "FIFO CRC error");
660                                         dev_kfree_skb_irq(skb);
661                                         skb = NULL;
662 #ifdef ERROR_STATISTIC
663                                         cs->err_crc++;
664 #endif
665                                 } else {
666                                         skb_queue_tail(&cs->rq, skb);
667                                         schedule_event(cs, D_RCVBUFREADY);
668                                 }
669                         }
670                 } else
671                         printk(KERN_WARNING "HFC: D receive out of memory\n");
672                 WaitForBusy(cs);
673                 cip = HFCD_FIFO | HFCD_F2_INC | HFCD_REC;
674                 WaitNoBusy(cs);
675                 stat = ReadReg(cs, HFCD_DATA, cip);
676                 WaitForBusy(cs);
677                 cip = HFCD_FIFO | HFCD_F2 | HFCD_REC;
678                 WaitNoBusy(cs);
679                 f2 = cs->readisac(cs, cip) & 0xf;
680         }
681         test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
682         return(1);
683
684
685 static void
686 hfc_fill_dfifo(struct IsdnCardState *cs)
687 {
688         int idx, fcnt;
689         int count;
690         u_char cip;
691
692         if (!cs->tx_skb)
693                 return;
694         if (cs->tx_skb->len <= 0)
695                 return;
696
697         SelFiFo(cs, 4 | HFCD_SEND);
698         cip = HFCD_FIFO | HFCD_F1 | HFCD_SEND;
699         WaitNoBusy(cs);
700         cs->hw.hfcD.f1 = ReadReg(cs, HFCD_DATA, cip) & 0xf;
701         WaitNoBusy(cs);
702         cip = HFCD_FIFO | HFCD_F2 | HFCD_SEND;
703         cs->hw.hfcD.f2 = ReadReg(cs, HFCD_DATA, cip) & 0xf;
704         cs->hw.hfcD.send[cs->hw.hfcD.f1] = ReadZReg(cs, HFCD_FIFO | HFCD_Z1 | HFCD_SEND);
705         if (cs->debug & L1_DEB_ISAC)
706                 debugl1(cs, "hfc_fill_Dfifo f1(%d) f2(%d) z1(%x)",
707                         cs->hw.hfcD.f1, cs->hw.hfcD.f2,
708                         cs->hw.hfcD.send[cs->hw.hfcD.f1]);
709         fcnt = cs->hw.hfcD.f1 - cs->hw.hfcD.f2;
710         if (fcnt < 0)
711                 fcnt += 16;
712         if (fcnt > 14) {
713                 if (cs->debug & L1_DEB_HSCX)
714                         debugl1(cs, "hfc_fill_Dfifo more as 14 frames");
715                 return;
716         }
717         count = GetFreeFifoBytes_D(cs);
718         if (cs->debug & L1_DEB_ISAC)
719                 debugl1(cs, "hfc_fill_Dfifo count(%ld/%d)",
720                         cs->tx_skb->len, count);
721         if (count < cs->tx_skb->len) {
722                 if (cs->debug & L1_DEB_ISAC)
723                         debugl1(cs, "hfc_fill_Dfifo no fifo mem");
724                 return;
725         }
726         cip = HFCD_FIFO | HFCD_FIFO_IN | HFCD_SEND;
727         idx = 0;
728         WaitForBusy(cs);
729         WaitNoBusy(cs);
730         WriteReg(cs, HFCD_DATA_NODEB, cip, cs->tx_skb->data[idx++]);
731         while (idx < cs->tx_skb->len) {
732                 if (!(WaitNoBusy(cs)))
733                         break;
734                 WriteReg(cs, HFCD_DATA_NODEB, cip, cs->tx_skb->data[idx]);
735                 idx++;
736         }
737         if (idx != cs->tx_skb->len) {
738                 debugl1(cs, "DFIFO Send BUSY error");
739                 printk(KERN_WARNING "HFC S DFIFO channel BUSY Error\n");
740         }
741         WaitForBusy(cs);
742         WaitNoBusy(cs);
743         ReadReg(cs, HFCD_DATA, HFCD_FIFO | HFCD_F1_INC | HFCD_SEND);
744         dev_kfree_skb_any(cs->tx_skb);
745         cs->tx_skb = NULL;
746         WaitForBusy(cs);
747         return;
748 }
749
750 static 
751 struct BCState *Sel_BCS(struct IsdnCardState *cs, int channel)
752 {
753         if (cs->bcs[0].mode && (cs->bcs[0].channel == channel))
754                 return(&cs->bcs[0]);
755         else if (cs->bcs[1].mode && (cs->bcs[1].channel == channel))
756                 return(&cs->bcs[1]);
757         else
758                 return(NULL);
759 }
760
761 void
762 hfc2bds0_interrupt(struct IsdnCardState *cs, u_char val)
763 {
764         u_char exval;
765         struct BCState *bcs;
766         int count=15;
767
768         if (cs->debug & L1_DEB_ISAC)
769                 debugl1(cs, "HFCD irq %x %s", val,
770                         test_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags) ?
771                         "locked" : "unlocked");
772         val &= cs->hw.hfcD.int_m1;
773         if (val & 0x40) { /* TE state machine irq */
774                 exval = cs->readisac(cs, HFCD_STATES) & 0xf;
775                 if (cs->debug & L1_DEB_ISAC)
776                         debugl1(cs, "ph_state chg %d->%d", cs->dc.hfcd.ph_state,
777                                 exval);
778                 cs->dc.hfcd.ph_state = exval;
779                 schedule_event(cs, D_L1STATECHANGE);
780                 val &= ~0x40;
781         }
782         while (val) {
783                 if (test_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
784                         cs->hw.hfcD.int_s1 |= val;
785                         return;
786                 }
787                 if (cs->hw.hfcD.int_s1 & 0x18) {
788                         exval = val;
789                         val =  cs->hw.hfcD.int_s1;
790                         cs->hw.hfcD.int_s1 = exval;
791                 }       
792                 if (val & 0x08) {
793                         if (!(bcs=Sel_BCS(cs, 0))) {
794                                 if (cs->debug)
795                                         debugl1(cs, "hfcd spurious 0x08 IRQ");
796                         } else 
797                                 main_rec_2bds0(bcs);
798                 }
799                 if (val & 0x10) {
800                         if (!(bcs=Sel_BCS(cs, 1))) {
801                                 if (cs->debug)
802                                         debugl1(cs, "hfcd spurious 0x10 IRQ");
803                         } else 
804                                 main_rec_2bds0(bcs);
805                 }
806                 if (val & 0x01) {
807                         if (!(bcs=Sel_BCS(cs, 0))) {
808                                 if (cs->debug)
809                                         debugl1(cs, "hfcd spurious 0x01 IRQ");
810                         } else {
811                                 if (bcs->tx_skb) {
812                                         if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
813                                                 hfc_fill_fifo(bcs);
814                                                 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
815                                         } else
816                                                 debugl1(cs,"fill_data %d blocked", bcs->channel);
817                                 } else {
818                                         if ((bcs->tx_skb = skb_dequeue(&bcs->squeue))) {
819                                                 if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
820                                                         hfc_fill_fifo(bcs);
821                                                         test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
822                                                 } else
823                                                         debugl1(cs,"fill_data %d blocked", bcs->channel);
824                                         } else {
825                                                 schedule_event(bcs, B_XMTBUFREADY);
826                                         }
827                                 }
828                         }
829                 }
830                 if (val & 0x02) {
831                         if (!(bcs=Sel_BCS(cs, 1))) {
832                                 if (cs->debug)
833                                         debugl1(cs, "hfcd spurious 0x02 IRQ");
834                         } else {
835                                 if (bcs->tx_skb) {
836                                         if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
837                                                 hfc_fill_fifo(bcs);
838                                                 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
839                                         } else
840                                                 debugl1(cs,"fill_data %d blocked", bcs->channel);
841                                 } else {
842                                         if ((bcs->tx_skb = skb_dequeue(&bcs->squeue))) {
843                                                 if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
844                                                         hfc_fill_fifo(bcs);
845                                                         test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
846                                                 } else
847                                                         debugl1(cs,"fill_data %d blocked", bcs->channel);
848                                         } else {
849                                                 schedule_event(bcs, B_XMTBUFREADY);
850                                         }
851                                 }
852                         }
853                 }
854                 if (val & 0x20) {       /* receive dframe */
855                         receive_dmsg(cs);
856                 }
857                 if (val & 0x04) {       /* dframe transmitted */
858                         if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
859                                 del_timer(&cs->dbusytimer);
860                         if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
861                                 schedule_event(cs, D_CLEARBUSY);
862                         if (cs->tx_skb) {
863                                 if (cs->tx_skb->len) {
864                                         if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
865                                                 hfc_fill_dfifo(cs);
866                                                 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
867                                         } else {
868                                                 debugl1(cs, "hfc_fill_dfifo irq blocked");
869                                         }
870                                         goto afterXPR;
871                                 } else {
872                                         dev_kfree_skb_irq(cs->tx_skb);
873                                         cs->tx_cnt = 0;
874                                         cs->tx_skb = NULL;
875                                 }
876                         }
877                         if ((cs->tx_skb = skb_dequeue(&cs->sq))) {
878                                 cs->tx_cnt = 0;
879                                 if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
880                                         hfc_fill_dfifo(cs);
881                                         test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
882                                 } else {
883                                         debugl1(cs, "hfc_fill_dfifo irq blocked");
884                                 }
885                         } else
886                                 schedule_event(cs, D_XMTBUFREADY);
887                 }
888       afterXPR:
889                 if (cs->hw.hfcD.int_s1 && count--) {
890                         val = cs->hw.hfcD.int_s1;
891                         cs->hw.hfcD.int_s1 = 0;
892                         if (cs->debug & L1_DEB_ISAC)
893                                 debugl1(cs, "HFCD irq %x loop %d", val, 15-count);
894                 } else
895                         val = 0;
896         }
897 }
898
899 static void
900 HFCD_l1hw(struct PStack *st, int pr, void *arg)
901 {
902         struct IsdnCardState *cs = (struct IsdnCardState *) st->l1.hardware;
903         struct sk_buff *skb = arg;
904         u_long flags;
905         
906         switch (pr) {
907                 case (PH_DATA | REQUEST):
908                         if (cs->debug & DEB_DLOG_HEX)
909                                 LogFrame(cs, skb->data, skb->len);
910                         if (cs->debug & DEB_DLOG_VERBOSE)
911                                 dlogframe(cs, skb, 0);
912                         spin_lock_irqsave(&cs->lock, flags);
913                         if (cs->tx_skb) {
914                                 skb_queue_tail(&cs->sq, skb);
915 #ifdef L2FRAME_DEBUG            /* psa */
916                                 if (cs->debug & L1_DEB_LAPD)
917                                         Logl2Frame(cs, skb, "PH_DATA Queued", 0);
918 #endif
919                         } else {
920                                 cs->tx_skb = skb;
921                                 cs->tx_cnt = 0;
922 #ifdef L2FRAME_DEBUG            /* psa */
923                                 if (cs->debug & L1_DEB_LAPD)
924                                         Logl2Frame(cs, skb, "PH_DATA", 0);
925 #endif
926                                 if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
927                                         hfc_fill_dfifo(cs);
928                                         test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
929                                 } else
930                                         debugl1(cs, "hfc_fill_dfifo blocked");
931
932                         }
933                         spin_unlock_irqrestore(&cs->lock, flags);
934                         break;
935                 case (PH_PULL | INDICATION):
936                         spin_lock_irqsave(&cs->lock, flags);
937                         if (cs->tx_skb) {
938                                 if (cs->debug & L1_DEB_WARN)
939                                         debugl1(cs, " l2l1 tx_skb exist this shouldn't happen");
940                                 skb_queue_tail(&cs->sq, skb);
941                                 spin_unlock_irqrestore(&cs->lock, flags);
942                                 break;
943                         }
944                         if (cs->debug & DEB_DLOG_HEX)
945                                 LogFrame(cs, skb->data, skb->len);
946                         if (cs->debug & DEB_DLOG_VERBOSE)
947                                 dlogframe(cs, skb, 0);
948                         cs->tx_skb = skb;
949                         cs->tx_cnt = 0;
950 #ifdef L2FRAME_DEBUG            /* psa */
951                         if (cs->debug & L1_DEB_LAPD)
952                                 Logl2Frame(cs, skb, "PH_DATA_PULLED", 0);
953 #endif
954                         if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
955                                 hfc_fill_dfifo(cs);
956                                 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
957                         } else
958                                 debugl1(cs, "hfc_fill_dfifo blocked");
959                         spin_unlock_irqrestore(&cs->lock, flags);
960                         break;
961                 case (PH_PULL | REQUEST):
962 #ifdef L2FRAME_DEBUG            /* psa */
963                         if (cs->debug & L1_DEB_LAPD)
964                                 debugl1(cs, "-> PH_REQUEST_PULL");
965 #endif
966                         if (!cs->tx_skb) {
967                                 test_and_clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
968                                 st->l1.l1l2(st, PH_PULL | CONFIRM, NULL);
969                         } else
970                                 test_and_set_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
971                         break;
972                 case (HW_RESET | REQUEST):
973                         spin_lock_irqsave(&cs->lock, flags);
974                         cs->writeisac(cs, HFCD_STATES, HFCD_LOAD_STATE | 3); /* HFC ST 3 */
975                         udelay(6);
976                         cs->writeisac(cs, HFCD_STATES, 3); /* HFC ST 2 */
977                         cs->hw.hfcD.mst_m |= HFCD_MASTER;
978                         cs->writeisac(cs, HFCD_MST_MODE, cs->hw.hfcD.mst_m);
979                         cs->writeisac(cs, HFCD_STATES, HFCD_ACTIVATE | HFCD_DO_ACTION);
980                         spin_unlock_irqrestore(&cs->lock, flags);
981                         l1_msg(cs, HW_POWERUP | CONFIRM, NULL);
982                         break;
983                 case (HW_ENABLE | REQUEST):
984                         spin_lock_irqsave(&cs->lock, flags);
985                         cs->writeisac(cs, HFCD_STATES, HFCD_ACTIVATE | HFCD_DO_ACTION);
986                         spin_unlock_irqrestore(&cs->lock, flags);
987                         break;
988                 case (HW_DEACTIVATE | REQUEST):
989                         spin_lock_irqsave(&cs->lock, flags);
990                         cs->hw.hfcD.mst_m &= ~HFCD_MASTER;
991                         cs->writeisac(cs, HFCD_MST_MODE, cs->hw.hfcD.mst_m);
992                         spin_unlock_irqrestore(&cs->lock, flags);
993                         break;
994                 case (HW_INFO3 | REQUEST):
995                         spin_lock_irqsave(&cs->lock, flags);
996                         cs->hw.hfcD.mst_m |= HFCD_MASTER;
997                         cs->writeisac(cs, HFCD_MST_MODE, cs->hw.hfcD.mst_m);
998                         spin_unlock_irqrestore(&cs->lock, flags);
999                         break;
1000                 default:
1001                         if (cs->debug & L1_DEB_WARN)
1002                                 debugl1(cs, "hfcd_l1hw unknown pr %4x", pr);
1003                         break;
1004         }
1005 }
1006
1007 static void
1008 setstack_hfcd(struct PStack *st, struct IsdnCardState *cs)
1009 {
1010         st->l1.l1hw = HFCD_l1hw;
1011 }
1012
1013 static void
1014 hfc_dbusy_timer(struct IsdnCardState *cs)
1015 {
1016 }
1017
1018 static unsigned int __init
1019 *init_send_hfcd(int cnt)
1020 {
1021         int i, *send;
1022
1023         if (!(send = kmalloc(cnt * sizeof(unsigned int), GFP_ATOMIC))) {
1024                 printk(KERN_WARNING
1025                        "HiSax: No memory for hfcd.send\n");
1026                 return(NULL);
1027         }
1028         for (i = 0; i < cnt; i++)
1029                 send[i] = 0x1fff;
1030         return(send);
1031 }
1032
1033 void __init
1034 init2bds0(struct IsdnCardState *cs)
1035 {
1036         cs->setstack_d = setstack_hfcd;
1037         if (!cs->hw.hfcD.send)
1038                 cs->hw.hfcD.send = init_send_hfcd(16);
1039         if (!cs->bcs[0].hw.hfc.send)
1040                 cs->bcs[0].hw.hfc.send = init_send_hfcd(32);
1041         if (!cs->bcs[1].hw.hfc.send)
1042                 cs->bcs[1].hw.hfc.send = init_send_hfcd(32);
1043         cs->BC_Send_Data = &hfc_send_data;
1044         cs->bcs[0].BC_SetStack = setstack_2b;
1045         cs->bcs[1].BC_SetStack = setstack_2b;
1046         cs->bcs[0].BC_Close = close_2bs0;
1047         cs->bcs[1].BC_Close = close_2bs0;
1048         mode_2bs0(cs->bcs, 0, 0);
1049         mode_2bs0(cs->bcs + 1, 0, 1);
1050 }
1051
1052 void
1053 release2bds0(struct IsdnCardState *cs)
1054 {
1055         kfree(cs->bcs[0].hw.hfc.send);
1056         cs->bcs[0].hw.hfc.send = NULL;
1057         kfree(cs->bcs[1].hw.hfc.send);
1058         cs->bcs[1].hw.hfc.send = NULL;
1059         kfree(cs->hw.hfcD.send);
1060         cs->hw.hfcD.send = NULL;
1061 }
1062
1063 void
1064 set_cs_func(struct IsdnCardState *cs)
1065 {
1066         cs->readisac = &readreghfcd;
1067         cs->writeisac = &writereghfcd;
1068         cs->readisacfifo = &dummyf;
1069         cs->writeisacfifo = &dummyf;
1070         cs->BC_Read_Reg = &ReadReg;
1071         cs->BC_Write_Reg = &WriteReg;
1072         cs->dbusytimer.function = (void *) hfc_dbusy_timer;
1073         cs->dbusytimer.data = (long) cs;
1074         init_timer(&cs->dbusytimer);
1075         INIT_WORK(&cs->tqueue, (void *)(void *) hfcd_bh, cs);
1076 }