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MIPS: Yosemite, Emma: Fix off-by-two in arcs_cmdline buffer size check
[linux-2.6/linux-mips.git] / drivers / isdn / hisax / hfc_sx.c
blob156d7c63d944cab5ed911b67b3ce485c2a64acec
1 /* $Id: hfc_sx.c,v 1.12.2.5 2004/02/11 13:21:33 keil Exp $
2 *
3 * level driver for Cologne Chip Designs hfc-s+/sp based cards
4 *
5 * Author Werner Cornelius
6 * based on existing driver for CCD HFC PCI cards
7 * Copyright by Werner Cornelius <werner@isdn4linux.de>
8 *
9 * This software may be used and distributed according to the terms
10 * of the GNU General Public License, incorporated herein by reference.
11 *
12 */
13
14 #include <linux/init.h>
15 #include "hisax.h"
16 #include "hfc_sx.h"
17 #include "isdnl1.h"
18 #include <linux/interrupt.h>
19 #include <linux/isapnp.h>
20 #include <linux/slab.h>
21
22 static const char *hfcsx_revision = "$Revision: 1.12.2.5 $";
23
24 /***************************************/
25 /* IRQ-table for CCDs demo board */
26 /* IRQs 6,5,10,11,12,15 are supported */
27 /***************************************/
28
29 /* Teles 16.3c Vendor Id TAG2620, Version 1.0, Vendor version 2.1
30 *
31 * Thanks to Uwe Wisniewski
32 *
33 * ISA-SLOT Signal PIN
34 * B25 IRQ3 92 IRQ_G
35 * B23 IRQ5 94 IRQ_A
36 * B4 IRQ2/9 95 IRQ_B
37 * D3 IRQ10 96 IRQ_C
38 * D4 IRQ11 97 IRQ_D
39 * D5 IRQ12 98 IRQ_E
40 * D6 IRQ15 99 IRQ_F
41 */
42
43 #undef CCD_DEMO_BOARD
44 #ifdef CCD_DEMO_BOARD
45 static u_char ccd_sp_irqtab[16] = {
46 0,0,0,0,0,2,1,0,0,0,3,4,5,0,0,6
47 };
48 #else /* Teles 16.3c */
49 static u_char ccd_sp_irqtab[16] = {
50 0,0,0,7,0,1,0,0,0,2,3,4,5,0,0,6
51 };
52 #endif
53 #define NT_T1_COUNT 20 /* number of 3.125ms interrupts for G2 timeout */
54
55 #define byteout(addr,val) outb(val,addr)
56 #define bytein(addr) inb(addr)
57
58 /******************************/
59 /* In/Out access to registers */
60 /******************************/
61 static inline void
62 Write_hfc(struct IsdnCardState *cs, u_char regnum, u_char val)
63 {
64 byteout(cs->hw.hfcsx.base+1, regnum);
65 byteout(cs->hw.hfcsx.base, val);
66 }
67
68 static inline u_char
69 Read_hfc(struct IsdnCardState *cs, u_char regnum)
70 {
71 u_char ret;
72
73 byteout(cs->hw.hfcsx.base+1, regnum);
74 ret = bytein(cs->hw.hfcsx.base);
75 return(ret);
76 }
77
78
79 /**************************************************/
80 /* select a fifo and remember which one for reuse */
81 /**************************************************/
82 static void
83 fifo_select(struct IsdnCardState *cs, u_char fifo)
84 {
85 if (fifo == cs->hw.hfcsx.last_fifo)
86 return; /* still valid */
87
88 byteout(cs->hw.hfcsx.base+1, HFCSX_FIF_SEL);
89 byteout(cs->hw.hfcsx.base, fifo);
90 while (bytein(cs->hw.hfcsx.base+1) & 1); /* wait for busy */
91 udelay(4);
92 byteout(cs->hw.hfcsx.base, fifo);
93 while (bytein(cs->hw.hfcsx.base+1) & 1); /* wait for busy */
94 }
95
96 /******************************************/
97 /* reset the specified fifo to defaults. */
98 /* If its a send fifo init needed markers */
99 /******************************************/
100 static void
101 reset_fifo(struct IsdnCardState *cs, u_char fifo)
102 {
103 fifo_select(cs, fifo); /* first select the fifo */
104 byteout(cs->hw.hfcsx.base+1, HFCSX_CIRM);
105 byteout(cs->hw.hfcsx.base, cs->hw.hfcsx.cirm | 0x80); /* reset cmd */
106 udelay(1);
107 while (bytein(cs->hw.hfcsx.base+1) & 1); /* wait for busy */
108 }
109
110
111 /*************************************************************/
112 /* write_fifo writes the skb contents to the desired fifo */
113 /* if no space is available or an error occurs 0 is returned */
114 /* the skb is not released in any way. */
115 /*************************************************************/
116 static int
117 write_fifo(struct IsdnCardState *cs, struct sk_buff *skb, u_char fifo, int trans_max)
118 {
119 unsigned short *msp;
120 int fifo_size, count, z1, z2;
121 u_char f_msk, f1, f2, *src;
122
123 if (skb->len <= 0) return(0);
124 if (fifo & 1) return(0); /* no write fifo */
125
126 fifo_select(cs, fifo);
127 if (fifo & 4) {
128 fifo_size = D_FIFO_SIZE; /* D-channel */
129 f_msk = MAX_D_FRAMES;
130 if (trans_max) return(0); /* only HDLC */
131 }
132 else {
133 fifo_size = cs->hw.hfcsx.b_fifo_size; /* B-channel */
134 f_msk = MAX_B_FRAMES;
135 }
136
137 z1 = Read_hfc(cs, HFCSX_FIF_Z1H);
138 z1 = ((z1 << 8) | Read_hfc(cs, HFCSX_FIF_Z1L));
139
140 /* Check for transparent mode */
141 if (trans_max) {
142 z2 = Read_hfc(cs, HFCSX_FIF_Z2H);
143 z2 = ((z2 << 8) | Read_hfc(cs, HFCSX_FIF_Z2L));
144 count = z2 - z1;
145 if (count <= 0)
146 count += fifo_size; /* free bytes */
147 if (count < skb->len+1) return(0); /* no room */
148 count = fifo_size - count; /* bytes still not send */
149 if (count > 2 * trans_max) return(0); /* delay to long */
150 count = skb->len;
151 src = skb->data;
152 while (count--)
153 Write_hfc(cs, HFCSX_FIF_DWR, *src++);
154 return(1); /* success */
155 }
156
157 msp = ((struct hfcsx_extra *)(cs->hw.hfcsx.extra))->marker;
158 msp += (((fifo >> 1) & 3) * (MAX_B_FRAMES+1));
159 f1 = Read_hfc(cs, HFCSX_FIF_F1) & f_msk;
160 f2 = Read_hfc(cs, HFCSX_FIF_F2) & f_msk;
161
162 count = f1 - f2; /* frame count actually buffered */
163 if (count < 0)
164 count += (f_msk + 1); /* if wrap around */
165 if (count > f_msk-1) {
166 if (cs->debug & L1_DEB_ISAC_FIFO)
167 debugl1(cs, "hfcsx_write_fifo %d more as %d frames",fifo,f_msk-1);
168 return(0);
169 }
170
171 *(msp + f1) = z1; /* remember marker */
172
173 if (cs->debug & L1_DEB_ISAC_FIFO)
174 debugl1(cs, "hfcsx_write_fifo %d f1(%x) f2(%x) z1(f1)(%x)",
175 fifo, f1, f2, z1);
176 /* now determine free bytes in FIFO buffer */
177 count = *(msp + f2) - z1;
178 if (count <= 0)
179 count += fifo_size; /* count now contains available bytes */
180
181 if (cs->debug & L1_DEB_ISAC_FIFO)
182 debugl1(cs, "hfcsx_write_fifo %d count(%u/%d)",
183 fifo, skb->len, count);
184 if (count < skb->len) {
185 if (cs->debug & L1_DEB_ISAC_FIFO)
186 debugl1(cs, "hfcsx_write_fifo %d no fifo mem", fifo);
187 return(0);
188 }
189
190 count = skb->len; /* get frame len */
191 src = skb->data; /* source pointer */
192 while (count--)
193 Write_hfc(cs, HFCSX_FIF_DWR, *src++);
194
195 Read_hfc(cs, HFCSX_FIF_INCF1); /* increment F1 */
196 udelay(1);
197 while (bytein(cs->hw.hfcsx.base+1) & 1); /* wait for busy */
198 return(1);
199 }
200
201 /***************************************************************/
202 /* read_fifo reads data to an skb from the desired fifo */
203 /* if no data is available or an error occurs NULL is returned */
204 /* the skb is not released in any way. */
205 /***************************************************************/
206 static struct sk_buff *
207 read_fifo(struct IsdnCardState *cs, u_char fifo, int trans_max)
208 { int fifo_size, count, z1, z2;
209 u_char f_msk, f1, f2, *dst;
210 struct sk_buff *skb;
211
212 if (!(fifo & 1)) return(NULL); /* no read fifo */
213 fifo_select(cs, fifo);
214 if (fifo & 4) {
215 fifo_size = D_FIFO_SIZE; /* D-channel */
216 f_msk = MAX_D_FRAMES;
217 if (trans_max) return(NULL); /* only hdlc */
218 }
219 else {
220 fifo_size = cs->hw.hfcsx.b_fifo_size; /* B-channel */
221 f_msk = MAX_B_FRAMES;
222 }
223
224 /* transparent mode */
225 if (trans_max) {
226 z1 = Read_hfc(cs, HFCSX_FIF_Z1H);
227 z1 = ((z1 << 8) | Read_hfc(cs, HFCSX_FIF_Z1L));
228 z2 = Read_hfc(cs, HFCSX_FIF_Z2H);
229 z2 = ((z2 << 8) | Read_hfc(cs, HFCSX_FIF_Z2L));
230 /* now determine bytes in actual FIFO buffer */
231 count = z1 - z2;
232 if (count <= 0)
233 count += fifo_size; /* count now contains buffered bytes */
234 count++;
235 if (count > trans_max)
236 count = trans_max; /* limit length */
237 skb = dev_alloc_skb(count);
238 if (skb) {
239 dst = skb_put(skb, count);
240 while (count--)
241 *dst++ = Read_hfc(cs, HFCSX_FIF_DRD);
242 return skb;
243 } else
244 return NULL; /* no memory */
245 }
246
247 do {
248 f1 = Read_hfc(cs, HFCSX_FIF_F1) & f_msk;
249 f2 = Read_hfc(cs, HFCSX_FIF_F2) & f_msk;
250
251 if (f1 == f2) return(NULL); /* no frame available */
252
253 z1 = Read_hfc(cs, HFCSX_FIF_Z1H);
254 z1 = ((z1 << 8) | Read_hfc(cs, HFCSX_FIF_Z1L));
255 z2 = Read_hfc(cs, HFCSX_FIF_Z2H);
256 z2 = ((z2 << 8) | Read_hfc(cs, HFCSX_FIF_Z2L));
257
258 if (cs->debug & L1_DEB_ISAC_FIFO)
259 debugl1(cs, "hfcsx_read_fifo %d f1(%x) f2(%x) z1(f2)(%x) z2(f2)(%x)",
260 fifo, f1, f2, z1, z2);
261 /* now determine bytes in actual FIFO buffer */
262 count = z1 - z2;
263 if (count <= 0)
264 count += fifo_size; /* count now contains buffered bytes */
265 count++;
266
267 if (cs->debug & L1_DEB_ISAC_FIFO)
268 debugl1(cs, "hfcsx_read_fifo %d count %u)",
269 fifo, count);
270
271 if ((count > fifo_size) || (count < 4)) {
272 if (cs->debug & L1_DEB_WARN)
273 debugl1(cs, "hfcsx_read_fifo %d paket inv. len %d ", fifo , count);
274 while (count) {
275 count--; /* empty fifo */
276 Read_hfc(cs, HFCSX_FIF_DRD);
277 }
278 skb = NULL;
279 } else
280 if ((skb = dev_alloc_skb(count - 3))) {
281 count -= 3;
282 dst = skb_put(skb, count);
283
284 while (count--)
285 *dst++ = Read_hfc(cs, HFCSX_FIF_DRD);
286
287 Read_hfc(cs, HFCSX_FIF_DRD); /* CRC 1 */
288 Read_hfc(cs, HFCSX_FIF_DRD); /* CRC 2 */
289 if (Read_hfc(cs, HFCSX_FIF_DRD)) {
290 dev_kfree_skb_irq(skb);
291 if (cs->debug & L1_DEB_ISAC_FIFO)
292 debugl1(cs, "hfcsx_read_fifo %d crc error", fifo);
293 skb = NULL;
294 }
295 } else {
296 printk(KERN_WARNING "HFC-SX: receive out of memory\n");
297 return(NULL);
298 }
299
300 Read_hfc(cs, HFCSX_FIF_INCF2); /* increment F2 */
301 udelay(1);
302 while (bytein(cs->hw.hfcsx.base+1) & 1); /* wait for busy */
303 udelay(1);
304 } while (!skb); /* retry in case of crc error */
305 return(skb);
306 }
307
308 /******************************************/
309 /* free hardware resources used by driver */
310 /******************************************/
311 static void
312 release_io_hfcsx(struct IsdnCardState *cs)
313 {
314 cs->hw.hfcsx.int_m2 = 0; /* interrupt output off ! */
315 Write_hfc(cs, HFCSX_INT_M2, cs->hw.hfcsx.int_m2);
316 Write_hfc(cs, HFCSX_CIRM, HFCSX_RESET); /* Reset On */
317 msleep(30); /* Timeout 30ms */
318 Write_hfc(cs, HFCSX_CIRM, 0); /* Reset Off */
319 del_timer(&cs->hw.hfcsx.timer);
320 release_region(cs->hw.hfcsx.base, 2); /* release IO-Block */
321 kfree(cs->hw.hfcsx.extra);
322 cs->hw.hfcsx.extra = NULL;
323 }
324
325 /**********************************************************/
326 /* set_fifo_size determines the size of the RAM and FIFOs */
327 /* returning 0 -> need to reset the chip again. */
328 /**********************************************************/
329 static int set_fifo_size(struct IsdnCardState *cs)
330 {
331
332 if (cs->hw.hfcsx.b_fifo_size) return(1); /* already determined */
333
334 if ((cs->hw.hfcsx.chip >> 4) == 9) {
335 cs->hw.hfcsx.b_fifo_size = B_FIFO_SIZE_32K;
336 return(1);
337 }
338
339 cs->hw.hfcsx.b_fifo_size = B_FIFO_SIZE_8K;
340 cs->hw.hfcsx.cirm |= 0x10; /* only 8K of ram */
341 return(0);
342
343 }
344
345 /********************************************************************************/
346 /* function called to reset the HFC SX chip. A complete software reset of chip */
347 /* and fifos is done. */
348 /********************************************************************************/
349 static void
350 reset_hfcsx(struct IsdnCardState *cs)
351 {
352 cs->hw.hfcsx.int_m2 = 0; /* interrupt output off ! */
353 Write_hfc(cs, HFCSX_INT_M2, cs->hw.hfcsx.int_m2);
354
355 printk(KERN_INFO "HFC_SX: resetting card\n");
356 while (1) {
357 Write_hfc(cs, HFCSX_CIRM, HFCSX_RESET | cs->hw.hfcsx.cirm ); /* Reset */
358 mdelay(30);
359 Write_hfc(cs, HFCSX_CIRM, cs->hw.hfcsx.cirm); /* Reset Off */
360 mdelay(20);
361 if (Read_hfc(cs, HFCSX_STATUS) & 2)
362 printk(KERN_WARNING "HFC-SX init bit busy\n");
363 cs->hw.hfcsx.last_fifo = 0xff; /* invalidate */
364 if (!set_fifo_size(cs)) continue;
365 break;
366 }
367
368 cs->hw.hfcsx.trm = 0 + HFCSX_BTRANS_THRESMASK; /* no echo connect , threshold */
369 Write_hfc(cs, HFCSX_TRM, cs->hw.hfcsx.trm);
370
371 Write_hfc(cs, HFCSX_CLKDEL, 0x0e); /* ST-Bit delay for TE-Mode */
372 cs->hw.hfcsx.sctrl_e = HFCSX_AUTO_AWAKE;
373 Write_hfc(cs, HFCSX_SCTRL_E, cs->hw.hfcsx.sctrl_e); /* S/T Auto awake */
374 cs->hw.hfcsx.bswapped = 0; /* no exchange */
375 cs->hw.hfcsx.nt_mode = 0; /* we are in TE mode */
376 cs->hw.hfcsx.ctmt = HFCSX_TIM3_125 | HFCSX_AUTO_TIMER;
377 Write_hfc(cs, HFCSX_CTMT, cs->hw.hfcsx.ctmt);
378
379 cs->hw.hfcsx.int_m1 = HFCSX_INTS_DTRANS | HFCSX_INTS_DREC |
380 HFCSX_INTS_L1STATE | HFCSX_INTS_TIMER;
381 Write_hfc(cs, HFCSX_INT_M1, cs->hw.hfcsx.int_m1);
382
383 /* Clear already pending ints */
384 if (Read_hfc(cs, HFCSX_INT_S1));
385
386 Write_hfc(cs, HFCSX_STATES, HFCSX_LOAD_STATE | 2); /* HFC ST 2 */
387 udelay(10);
388 Write_hfc(cs, HFCSX_STATES, 2); /* HFC ST 2 */
389 cs->hw.hfcsx.mst_m = HFCSX_MASTER; /* HFC Master Mode */
390
391 Write_hfc(cs, HFCSX_MST_MODE, cs->hw.hfcsx.mst_m);
392 cs->hw.hfcsx.sctrl = 0x40; /* set tx_lo mode, error in datasheet ! */
393 Write_hfc(cs, HFCSX_SCTRL, cs->hw.hfcsx.sctrl);
394 cs->hw.hfcsx.sctrl_r = 0;
395 Write_hfc(cs, HFCSX_SCTRL_R, cs->hw.hfcsx.sctrl_r);
396
397 /* Init GCI/IOM2 in master mode */
398 /* Slots 0 and 1 are set for B-chan 1 and 2 */
399 /* D- and monitor/CI channel are not enabled */
400 /* STIO1 is used as output for data, B1+B2 from ST->IOM+HFC */
401 /* STIO2 is used as data input, B1+B2 from IOM->ST */
402 /* ST B-channel send disabled -> continuous 1s */
403 /* The IOM slots are always enabled */
404 cs->hw.hfcsx.conn = 0x36; /* set data flow directions */
405 Write_hfc(cs, HFCSX_CONNECT, cs->hw.hfcsx.conn);
406 Write_hfc(cs, HFCSX_B1_SSL, 0x80); /* B1-Slot 0 STIO1 out enabled */
407 Write_hfc(cs, HFCSX_B2_SSL, 0x81); /* B2-Slot 1 STIO1 out enabled */
408 Write_hfc(cs, HFCSX_B1_RSL, 0x80); /* B1-Slot 0 STIO2 in enabled */
409 Write_hfc(cs, HFCSX_B2_RSL, 0x81); /* B2-Slot 1 STIO2 in enabled */
410
411 /* Finally enable IRQ output */
412 cs->hw.hfcsx.int_m2 = HFCSX_IRQ_ENABLE;
413 Write_hfc(cs, HFCSX_INT_M2, cs->hw.hfcsx.int_m2);
414 if (Read_hfc(cs, HFCSX_INT_S2));
415 }
416
417 /***************************************************/
418 /* Timer function called when kernel timer expires */
419 /***************************************************/
420 static void
421 hfcsx_Timer(struct IsdnCardState *cs)
422 {
423 cs->hw.hfcsx.timer.expires = jiffies + 75;
424 /* WD RESET */
425 /* WriteReg(cs, HFCD_DATA, HFCD_CTMT, cs->hw.hfcsx.ctmt | 0x80);
426 add_timer(&cs->hw.hfcsx.timer);
427 */
428 }
429
430 /************************************************/
431 /* select a b-channel entry matching and active */
432 /************************************************/
433 static
434 struct BCState *
435 Sel_BCS(struct IsdnCardState *cs, int channel)
436 {
437 if (cs->bcs[0].mode && (cs->bcs[0].channel == channel))
438 return (&cs->bcs[0]);
439 else if (cs->bcs[1].mode && (cs->bcs[1].channel == channel))
440 return (&cs->bcs[1]);
441 else
442 return (NULL);
443 }
444
445 /*******************************/
446 /* D-channel receive procedure */
447 /*******************************/
448 static
449 int
450 receive_dmsg(struct IsdnCardState *cs)
451 {
452 struct sk_buff *skb;
453 int count = 5;
454
455 if (test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
456 debugl1(cs, "rec_dmsg blocked");
457 return (1);
458 }
459
460 do {
461 skb = read_fifo(cs, HFCSX_SEL_D_RX, 0);
462 if (skb) {
463 skb_queue_tail(&cs->rq, skb);
464 schedule_event(cs, D_RCVBUFREADY);
465 }
466 } while (--count && skb);
467
468 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
469 return (1);
470 }
471
472 /**********************************/
473 /* B-channel main receive routine */
474 /**********************************/
475 static void
476 main_rec_hfcsx(struct BCState *bcs)
477 {
478 struct IsdnCardState *cs = bcs->cs;
479 int count = 5;
480 struct sk_buff *skb;
481
482 Begin:
483 count--;
484 if (test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
485 debugl1(cs, "rec_data %d blocked", bcs->channel);
486 return;
487 }
488 skb = read_fifo(cs, ((bcs->channel) && (!cs->hw.hfcsx.bswapped)) ?
489 HFCSX_SEL_B2_RX : HFCSX_SEL_B1_RX,
490 (bcs->mode == L1_MODE_TRANS) ?
491 HFCSX_BTRANS_THRESHOLD : 0);
492
493 if (skb) {
494 skb_queue_tail(&bcs->rqueue, skb);
495 schedule_event(bcs, B_RCVBUFREADY);
496 }
497
498 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
499 if (count && skb)
500 goto Begin;
501 return;
502 }
503
504 /**************************/
505 /* D-channel send routine */
506 /**************************/
507 static void
508 hfcsx_fill_dfifo(struct IsdnCardState *cs)
509 {
510 if (!cs->tx_skb)
511 return;
512 if (cs->tx_skb->len <= 0)
513 return;
514
515 if (write_fifo(cs, cs->tx_skb, HFCSX_SEL_D_TX, 0)) {
516 dev_kfree_skb_any(cs->tx_skb);
517 cs->tx_skb = NULL;
518 }
519 return;
520 }
521
522 /**************************/
523 /* B-channel send routine */
524 /**************************/
525 static void
526 hfcsx_fill_fifo(struct BCState *bcs)
527 {
528 struct IsdnCardState *cs = bcs->cs;
529
530 if (!bcs->tx_skb)
531 return;
532 if (bcs->tx_skb->len <= 0)
533 return;
534
535 if (write_fifo(cs, bcs->tx_skb,
536 ((bcs->channel) && (!cs->hw.hfcsx.bswapped)) ?
537 HFCSX_SEL_B2_TX : HFCSX_SEL_B1_TX,
538 (bcs->mode == L1_MODE_TRANS) ?
539 HFCSX_BTRANS_THRESHOLD : 0)) {
540
541 bcs->tx_cnt -= bcs->tx_skb->len;
542 if (test_bit(FLG_LLI_L1WAKEUP,&bcs->st->lli.flag) &&
543 (PACKET_NOACK != bcs->tx_skb->pkt_type)) {
544 u_long flags;
545 spin_lock_irqsave(&bcs->aclock, flags);
546 bcs->ackcnt += bcs->tx_skb->len;
547 spin_unlock_irqrestore(&bcs->aclock, flags);
548 schedule_event(bcs, B_ACKPENDING);
549 }
550 dev_kfree_skb_any(bcs->tx_skb);
551 bcs->tx_skb = NULL;
552 test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
553 }
554 }
555
556 /**********************************************/
557 /* D-channel l1 state call for leased NT-mode */
558 /**********************************************/
559 static void
560 dch_nt_l2l1(struct PStack *st, int pr, void *arg)
561 {
562 struct IsdnCardState *cs = (struct IsdnCardState *) st->l1.hardware;
563
564 switch (pr) {
565 case (PH_DATA | REQUEST):
566 case (PH_PULL | REQUEST):
567 case (PH_PULL | INDICATION):
568 st->l1.l1hw(st, pr, arg);
569 break;
570 case (PH_ACTIVATE | REQUEST):
571 st->l1.l1l2(st, PH_ACTIVATE | CONFIRM, NULL);
572 break;
573 case (PH_TESTLOOP | REQUEST):
574 if (1 & (long) arg)
575 debugl1(cs, "PH_TEST_LOOP B1");
576 if (2 & (long) arg)
577 debugl1(cs, "PH_TEST_LOOP B2");
578 if (!(3 & (long) arg))
579 debugl1(cs, "PH_TEST_LOOP DISABLED");
580 st->l1.l1hw(st, HW_TESTLOOP | REQUEST, arg);
581 break;
582 default:
583 if (cs->debug)
584 debugl1(cs, "dch_nt_l2l1 msg %04X unhandled", pr);
585 break;
586 }
587 }
588
589
590
591 /***********************/
592 /* set/reset echo mode */
593 /***********************/
594 static int
595 hfcsx_auxcmd(struct IsdnCardState *cs, isdn_ctrl * ic)
596 {
597 unsigned long flags;
598 int i = *(unsigned int *) ic->parm.num;
599
600 if ((ic->arg == 98) &&
601 (!(cs->hw.hfcsx.int_m1 & (HFCSX_INTS_B2TRANS + HFCSX_INTS_B2REC + HFCSX_INTS_B1TRANS + HFCSX_INTS_B1REC)))) {
602 spin_lock_irqsave(&cs->lock, flags);
603 Write_hfc(cs, HFCSX_STATES, HFCSX_LOAD_STATE | 0); /* HFC ST G0 */
604 udelay(10);
605 cs->hw.hfcsx.sctrl |= SCTRL_MODE_NT;
606 Write_hfc(cs, HFCSX_SCTRL, cs->hw.hfcsx.sctrl); /* set NT-mode */
607 udelay(10);
608 Write_hfc(cs, HFCSX_STATES, HFCSX_LOAD_STATE | 1); /* HFC ST G1 */
609 udelay(10);
610 Write_hfc(cs, HFCSX_STATES, 1 | HFCSX_ACTIVATE | HFCSX_DO_ACTION);
611 cs->dc.hfcsx.ph_state = 1;
612 cs->hw.hfcsx.nt_mode = 1;
613 cs->hw.hfcsx.nt_timer = 0;
614 spin_unlock_irqrestore(&cs->lock, flags);
615 cs->stlist->l2.l2l1 = dch_nt_l2l1;
616 debugl1(cs, "NT mode activated");
617 return (0);
618 }
619 if ((cs->chanlimit > 1) || (cs->hw.hfcsx.bswapped) ||
620 (cs->hw.hfcsx.nt_mode) || (ic->arg != 12))
621 return (-EINVAL);
622
623 if (i) {
624 cs->logecho = 1;
625 cs->hw.hfcsx.trm |= 0x20; /* enable echo chan */
626 cs->hw.hfcsx.int_m1 |= HFCSX_INTS_B2REC;
627 /* reset Channel !!!!! */
628 } else {
629 cs->logecho = 0;
630 cs->hw.hfcsx.trm &= ~0x20; /* disable echo chan */
631 cs->hw.hfcsx.int_m1 &= ~HFCSX_INTS_B2REC;
632 }
633 cs->hw.hfcsx.sctrl_r &= ~SCTRL_B2_ENA;
634 cs->hw.hfcsx.sctrl &= ~SCTRL_B2_ENA;
635 cs->hw.hfcsx.conn |= 0x10; /* B2-IOM -> B2-ST */
636 cs->hw.hfcsx.ctmt &= ~2;
637 spin_lock_irqsave(&cs->lock, flags);
638 Write_hfc(cs, HFCSX_CTMT, cs->hw.hfcsx.ctmt);
639 Write_hfc(cs, HFCSX_SCTRL_R, cs->hw.hfcsx.sctrl_r);
640 Write_hfc(cs, HFCSX_SCTRL, cs->hw.hfcsx.sctrl);
641 Write_hfc(cs, HFCSX_CONNECT, cs->hw.hfcsx.conn);
642 Write_hfc(cs, HFCSX_TRM, cs->hw.hfcsx.trm);
643 Write_hfc(cs, HFCSX_INT_M1, cs->hw.hfcsx.int_m1);
644 spin_unlock_irqrestore(&cs->lock, flags);
645 return (0);
646 } /* hfcsx_auxcmd */
647
648 /*****************************/
649 /* E-channel receive routine */
650 /*****************************/
651 static void
652 receive_emsg(struct IsdnCardState *cs)
653 {
654 int count = 5;
655 u_char *ptr;
656 struct sk_buff *skb;
657
658 if (test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
659 debugl1(cs, "echo_rec_data blocked");
660 return;
661 }
662 do {
663 skb = read_fifo(cs, HFCSX_SEL_B2_RX, 0);
664 if (skb) {
665 if (cs->debug & DEB_DLOG_HEX) {
666 ptr = cs->dlog;
667 if ((skb->len) < MAX_DLOG_SPACE / 3 - 10) {
668 *ptr++ = 'E';
669 *ptr++ = 'C';
670 *ptr++ = 'H';
671 *ptr++ = 'O';
672 *ptr++ = ':';
673 ptr += QuickHex(ptr, skb->data, skb->len);
674 ptr--;
675 *ptr++ = '\n';
676 *ptr = 0;
677 HiSax_putstatus(cs, NULL, cs->dlog);
678 } else
679 HiSax_putstatus(cs, "LogEcho: ", "warning Frame too big (%d)", skb->len);
680 }
681 dev_kfree_skb_any(skb);
682 }
683 } while (--count && skb);
684
685 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
686 return;
687 } /* receive_emsg */
688
689
690 /*********************/
691 /* Interrupt handler */
692 /*********************/
693 static irqreturn_t
694 hfcsx_interrupt(int intno, void *dev_id)
695 {
696 struct IsdnCardState *cs = dev_id;
697 u_char exval;
698 struct BCState *bcs;
699 int count = 15;
700 u_long flags;
701 u_char val, stat;
702
703 if (!(cs->hw.hfcsx.int_m2 & 0x08))
704 return IRQ_NONE; /* not initialised */
705
706 spin_lock_irqsave(&cs->lock, flags);
707 if (HFCSX_ANYINT & (stat = Read_hfc(cs, HFCSX_STATUS))) {
708 val = Read_hfc(cs, HFCSX_INT_S1);
709 if (cs->debug & L1_DEB_ISAC)
710 debugl1(cs, "HFC-SX: stat(%02x) s1(%02x)", stat, val);
711 } else {
712 spin_unlock_irqrestore(&cs->lock, flags);
713 return IRQ_NONE;
714 }
715 if (cs->debug & L1_DEB_ISAC)
716 debugl1(cs, "HFC-SX irq %x %s", val,
717 test_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags) ?
718 "locked" : "unlocked");
719 val &= cs->hw.hfcsx.int_m1;
720 if (val & 0x40) { /* state machine irq */
721 exval = Read_hfc(cs, HFCSX_STATES) & 0xf;
722 if (cs->debug & L1_DEB_ISAC)
723 debugl1(cs, "ph_state chg %d->%d", cs->dc.hfcsx.ph_state,
724 exval);
725 cs->dc.hfcsx.ph_state = exval;
726 schedule_event(cs, D_L1STATECHANGE);
727 val &= ~0x40;
728 }
729 if (val & 0x80) { /* timer irq */
730 if (cs->hw.hfcsx.nt_mode) {
731 if ((--cs->hw.hfcsx.nt_timer) < 0)
732 schedule_event(cs, D_L1STATECHANGE);
733 }
734 val &= ~0x80;
735 Write_hfc(cs, HFCSX_CTMT, cs->hw.hfcsx.ctmt | HFCSX_CLTIMER);
736 }
737 while (val) {
738 if (test_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
739 cs->hw.hfcsx.int_s1 |= val;
740 spin_unlock_irqrestore(&cs->lock, flags);
741 return IRQ_HANDLED;
742 }
743 if (cs->hw.hfcsx.int_s1 & 0x18) {
744 exval = val;
745 val = cs->hw.hfcsx.int_s1;
746 cs->hw.hfcsx.int_s1 = exval;
747 }
748 if (val & 0x08) {
749 if (!(bcs = Sel_BCS(cs, cs->hw.hfcsx.bswapped ? 1 : 0))) {
750 if (cs->debug)
751 debugl1(cs, "hfcsx spurious 0x08 IRQ");
752 } else
753 main_rec_hfcsx(bcs);
754 }
755 if (val & 0x10) {
756 if (cs->logecho)
757 receive_emsg(cs);
758 else if (!(bcs = Sel_BCS(cs, 1))) {
759 if (cs->debug)
760 debugl1(cs, "hfcsx spurious 0x10 IRQ");
761 } else
762 main_rec_hfcsx(bcs);
763 }
764 if (val & 0x01) {
765 if (!(bcs = Sel_BCS(cs, cs->hw.hfcsx.bswapped ? 1 : 0))) {
766 if (cs->debug)
767 debugl1(cs, "hfcsx spurious 0x01 IRQ");
768 } else {
769 if (bcs->tx_skb) {
770 if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
771 hfcsx_fill_fifo(bcs);
772 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
773 } else
774 debugl1(cs, "fill_data %d blocked", bcs->channel);
775 } else {
776 if ((bcs->tx_skb = skb_dequeue(&bcs->squeue))) {
777 if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
778 hfcsx_fill_fifo(bcs);
779 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
780 } else
781 debugl1(cs, "fill_data %d blocked", bcs->channel);
782 } else {
783 schedule_event(bcs, B_XMTBUFREADY);
784 }
785 }
786 }
787 }
788 if (val & 0x02) {
789 if (!(bcs = Sel_BCS(cs, 1))) {
790 if (cs->debug)
791 debugl1(cs, "hfcsx spurious 0x02 IRQ");
792 } else {
793 if (bcs->tx_skb) {
794 if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
795 hfcsx_fill_fifo(bcs);
796 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
797 } else
798 debugl1(cs, "fill_data %d blocked", bcs->channel);
799 } else {
800 if ((bcs->tx_skb = skb_dequeue(&bcs->squeue))) {
801 if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
802 hfcsx_fill_fifo(bcs);
803 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
804 } else
805 debugl1(cs, "fill_data %d blocked", bcs->channel);
806 } else {
807 schedule_event(bcs, B_XMTBUFREADY);
808 }
809 }
810 }
811 }
812 if (val & 0x20) { /* receive dframe */
813 receive_dmsg(cs);
814 }
815 if (val & 0x04) { /* dframe transmitted */
816 if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
817 del_timer(&cs->dbusytimer);
818 if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
819 schedule_event(cs, D_CLEARBUSY);
820 if (cs->tx_skb) {
821 if (cs->tx_skb->len) {
822 if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
823 hfcsx_fill_dfifo(cs);
824 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
825 } else {
826 debugl1(cs, "hfcsx_fill_dfifo irq blocked");
827 }
828 goto afterXPR;
829 } else {
830 dev_kfree_skb_irq(cs->tx_skb);
831 cs->tx_cnt = 0;
832 cs->tx_skb = NULL;
833 }
834 }
835 if ((cs->tx_skb = skb_dequeue(&cs->sq))) {
836 cs->tx_cnt = 0;
837 if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
838 hfcsx_fill_dfifo(cs);
839 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
840 } else {
841 debugl1(cs, "hfcsx_fill_dfifo irq blocked");
842 }
843 } else
844 schedule_event(cs, D_XMTBUFREADY);
845 }
846 afterXPR:
847 if (cs->hw.hfcsx.int_s1 && count--) {
848 val = cs->hw.hfcsx.int_s1;
849 cs->hw.hfcsx.int_s1 = 0;
850 if (cs->debug & L1_DEB_ISAC)
851 debugl1(cs, "HFC-SX irq %x loop %d", val, 15 - count);
852 } else
853 val = 0;
854 }
855 spin_unlock_irqrestore(&cs->lock, flags);
856 return IRQ_HANDLED;
857 }
858
859 /********************************************************************/
860 /* timer callback for D-chan busy resolution. Currently no function */
861 /********************************************************************/
862 static void
863 hfcsx_dbusy_timer(struct IsdnCardState *cs)
864 {
865 }
866
867 /*************************************/
868 /* Layer 1 D-channel hardware access */
869 /*************************************/
870 static void
871 HFCSX_l1hw(struct PStack *st, int pr, void *arg)
872 {
873 struct IsdnCardState *cs = (struct IsdnCardState *) st->l1.hardware;
874 struct sk_buff *skb = arg;
875 u_long flags;
876
877 switch (pr) {
878 case (PH_DATA | REQUEST):
879 if (cs->debug & DEB_DLOG_HEX)
880 LogFrame(cs, skb->data, skb->len);
881 if (cs->debug & DEB_DLOG_VERBOSE)
882 dlogframe(cs, skb, 0);
883 spin_lock_irqsave(&cs->lock, flags);
884 if (cs->tx_skb) {
885 skb_queue_tail(&cs->sq, skb);
886 #ifdef L2FRAME_DEBUG /* psa */
887 if (cs->debug & L1_DEB_LAPD)
888 Logl2Frame(cs, skb, "PH_DATA Queued", 0);
889 #endif
890 } else {
891 cs->tx_skb = skb;
892 cs->tx_cnt = 0;
893 #ifdef L2FRAME_DEBUG /* psa */
894 if (cs->debug & L1_DEB_LAPD)
895 Logl2Frame(cs, skb, "PH_DATA", 0);
896 #endif
897 if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
898 hfcsx_fill_dfifo(cs);
899 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
900 } else
901 debugl1(cs, "hfcsx_fill_dfifo blocked");
902
903 }
904 spin_unlock_irqrestore(&cs->lock, flags);
905 break;
906 case (PH_PULL | INDICATION):
907 spin_lock_irqsave(&cs->lock, flags);
908 if (cs->tx_skb) {
909 if (cs->debug & L1_DEB_WARN)
910 debugl1(cs, " l2l1 tx_skb exist this shouldn't happen");
911 skb_queue_tail(&cs->sq, skb);
912 spin_unlock_irqrestore(&cs->lock, flags);
913 break;
914 }
915 if (cs->debug & DEB_DLOG_HEX)
916 LogFrame(cs, skb->data, skb->len);
917 if (cs->debug & DEB_DLOG_VERBOSE)
918 dlogframe(cs, skb, 0);
919 cs->tx_skb = skb;
920 cs->tx_cnt = 0;
921 #ifdef L2FRAME_DEBUG /* psa */
922 if (cs->debug & L1_DEB_LAPD)
923 Logl2Frame(cs, skb, "PH_DATA_PULLED", 0);
924 #endif
925 if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
926 hfcsx_fill_dfifo(cs);
927 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
928 } else
929 debugl1(cs, "hfcsx_fill_dfifo blocked");
930 spin_unlock_irqrestore(&cs->lock, flags);
931 break;
932 case (PH_PULL | REQUEST):
933 #ifdef L2FRAME_DEBUG /* psa */
934 if (cs->debug & L1_DEB_LAPD)
935 debugl1(cs, "-> PH_REQUEST_PULL");
936 #endif
937 if (!cs->tx_skb) {
938 test_and_clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
939 st->l1.l1l2(st, PH_PULL | CONFIRM, NULL);
940 } else
941 test_and_set_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
942 break;
943 case (HW_RESET | REQUEST):
944 spin_lock_irqsave(&cs->lock, flags);
945 Write_hfc(cs, HFCSX_STATES, HFCSX_LOAD_STATE | 3); /* HFC ST 3 */
946 udelay(6);
947 Write_hfc(cs, HFCSX_STATES, 3); /* HFC ST 2 */
948 cs->hw.hfcsx.mst_m |= HFCSX_MASTER;
949 Write_hfc(cs, HFCSX_MST_MODE, cs->hw.hfcsx.mst_m);
950 Write_hfc(cs, HFCSX_STATES, HFCSX_ACTIVATE | HFCSX_DO_ACTION);
951 spin_unlock_irqrestore(&cs->lock, flags);
952 l1_msg(cs, HW_POWERUP | CONFIRM, NULL);
953 break;
954 case (HW_ENABLE | REQUEST):
955 spin_lock_irqsave(&cs->lock, flags);
956 Write_hfc(cs, HFCSX_STATES, HFCSX_ACTIVATE | HFCSX_DO_ACTION);
957 spin_unlock_irqrestore(&cs->lock, flags);
958 break;
959 case (HW_DEACTIVATE | REQUEST):
960 spin_lock_irqsave(&cs->lock, flags);
961 cs->hw.hfcsx.mst_m &= ~HFCSX_MASTER;
962 Write_hfc(cs, HFCSX_MST_MODE, cs->hw.hfcsx.mst_m);
963 spin_unlock_irqrestore(&cs->lock, flags);
964 break;
965 case (HW_INFO3 | REQUEST):
966 spin_lock_irqsave(&cs->lock, flags);
967 cs->hw.hfcsx.mst_m |= HFCSX_MASTER;
968 Write_hfc(cs, HFCSX_MST_MODE, cs->hw.hfcsx.mst_m);
969 spin_unlock_irqrestore(&cs->lock, flags);
970 break;
971 case (HW_TESTLOOP | REQUEST):
972 spin_lock_irqsave(&cs->lock, flags);
973 switch ((long) arg) {
974 case (1):
975 Write_hfc(cs, HFCSX_B1_SSL, 0x80); /* tx slot */
976 Write_hfc(cs, HFCSX_B1_RSL, 0x80); /* rx slot */
977 cs->hw.hfcsx.conn = (cs->hw.hfcsx.conn & ~7) | 1;
978 Write_hfc(cs, HFCSX_CONNECT, cs->hw.hfcsx.conn);
979 break;
980 case (2):
981 Write_hfc(cs, HFCSX_B2_SSL, 0x81); /* tx slot */
982 Write_hfc(cs, HFCSX_B2_RSL, 0x81); /* rx slot */
983 cs->hw.hfcsx.conn = (cs->hw.hfcsx.conn & ~0x38) | 0x08;
984 Write_hfc(cs, HFCSX_CONNECT, cs->hw.hfcsx.conn);
985 break;
986 default:
987 spin_unlock_irqrestore(&cs->lock, flags);
988 if (cs->debug & L1_DEB_WARN)
989 debugl1(cs, "hfcsx_l1hw loop invalid %4lx", (unsigned long)arg);
990 return;
991 }
992 cs->hw.hfcsx.trm |= 0x80; /* enable IOM-loop */
993 Write_hfc(cs, HFCSX_TRM, cs->hw.hfcsx.trm);
994 spin_unlock_irqrestore(&cs->lock, flags);
995 break;
996 default:
997 if (cs->debug & L1_DEB_WARN)
998 debugl1(cs, "hfcsx_l1hw unknown pr %4x", pr);
999 break;
1000 }
1001 }
1002
1003 /***********************************************/
1004 /* called during init setting l1 stack pointer */
1005 /***********************************************/
1006 static void
1007 setstack_hfcsx(struct PStack *st, struct IsdnCardState *cs)
1008 {
1009 st->l1.l1hw = HFCSX_l1hw;
1010 }
1011
1012 /**************************************/
1013 /* send B-channel data if not blocked */
1014 /**************************************/
1015 static void
1016 hfcsx_send_data(struct BCState *bcs)
1017 {
1018 struct IsdnCardState *cs = bcs->cs;
1019
1020 if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
1021 hfcsx_fill_fifo(bcs);
1022 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
1023 } else
1024 debugl1(cs, "send_data %d blocked", bcs->channel);
1025 }
1026
1027 /***************************************************************/
1028 /* activate/deactivate hardware for selected channels and mode */
1029 /***************************************************************/
1030 static void
1031 mode_hfcsx(struct BCState *bcs, int mode, int bc)
1032 {
1033 struct IsdnCardState *cs = bcs->cs;
1034 int fifo2;
1035
1036 if (cs->debug & L1_DEB_HSCX)
1037 debugl1(cs, "HFCSX bchannel mode %d bchan %d/%d",
1038 mode, bc, bcs->channel);
1039 bcs->mode = mode;
1040 bcs->channel = bc;
1041 fifo2 = bc;
1042 if (cs->chanlimit > 1) {
1043 cs->hw.hfcsx.bswapped = 0; /* B1 and B2 normal mode */
1044 cs->hw.hfcsx.sctrl_e &= ~0x80;
1045 } else {
1046 if (bc) {
1047 if (mode != L1_MODE_NULL) {
1048 cs->hw.hfcsx.bswapped = 1; /* B1 and B2 exchanged */
1049 cs->hw.hfcsx.sctrl_e |= 0x80;
1050 } else {
1051 cs->hw.hfcsx.bswapped = 0; /* B1 and B2 normal mode */
1052 cs->hw.hfcsx.sctrl_e &= ~0x80;
1053 }
1054 fifo2 = 0;
1055 } else {
1056 cs->hw.hfcsx.bswapped = 0; /* B1 and B2 normal mode */
1057 cs->hw.hfcsx.sctrl_e &= ~0x80;
1058 }
1059 }
1060 switch (mode) {
1061 case (L1_MODE_NULL):
1062 if (bc) {
1063 cs->hw.hfcsx.sctrl &= ~SCTRL_B2_ENA;
1064 cs->hw.hfcsx.sctrl_r &= ~SCTRL_B2_ENA;
1065 } else {
1066 cs->hw.hfcsx.sctrl &= ~SCTRL_B1_ENA;
1067 cs->hw.hfcsx.sctrl_r &= ~SCTRL_B1_ENA;
1068 }
1069 if (fifo2) {
1070 cs->hw.hfcsx.int_m1 &= ~(HFCSX_INTS_B2TRANS + HFCSX_INTS_B2REC);
1071 } else {
1072 cs->hw.hfcsx.int_m1 &= ~(HFCSX_INTS_B1TRANS + HFCSX_INTS_B1REC);
1073 }
1074 break;
1075 case (L1_MODE_TRANS):
1076 if (bc) {
1077 cs->hw.hfcsx.sctrl |= SCTRL_B2_ENA;
1078 cs->hw.hfcsx.sctrl_r |= SCTRL_B2_ENA;
1079 } else {
1080 cs->hw.hfcsx.sctrl |= SCTRL_B1_ENA;
1081 cs->hw.hfcsx.sctrl_r |= SCTRL_B1_ENA;
1082 }
1083 if (fifo2) {
1084 cs->hw.hfcsx.int_m1 |= (HFCSX_INTS_B2TRANS + HFCSX_INTS_B2REC);
1085 cs->hw.hfcsx.ctmt |= 2;
1086 cs->hw.hfcsx.conn &= ~0x18;
1087 } else {
1088 cs->hw.hfcsx.int_m1 |= (HFCSX_INTS_B1TRANS + HFCSX_INTS_B1REC);
1089 cs->hw.hfcsx.ctmt |= 1;
1090 cs->hw.hfcsx.conn &= ~0x03;
1091 }
1092 break;
1093 case (L1_MODE_HDLC):
1094 if (bc) {
1095 cs->hw.hfcsx.sctrl |= SCTRL_B2_ENA;
1096 cs->hw.hfcsx.sctrl_r |= SCTRL_B2_ENA;
1097 } else {
1098 cs->hw.hfcsx.sctrl |= SCTRL_B1_ENA;
1099 cs->hw.hfcsx.sctrl_r |= SCTRL_B1_ENA;
1100 }
1101 if (fifo2) {
1102 cs->hw.hfcsx.int_m1 |= (HFCSX_INTS_B2TRANS + HFCSX_INTS_B2REC);
1103 cs->hw.hfcsx.ctmt &= ~2;
1104 cs->hw.hfcsx.conn &= ~0x18;
1105 } else {
1106 cs->hw.hfcsx.int_m1 |= (HFCSX_INTS_B1TRANS + HFCSX_INTS_B1REC);
1107 cs->hw.hfcsx.ctmt &= ~1;
1108 cs->hw.hfcsx.conn &= ~0x03;
1109 }
1110 break;
1111 case (L1_MODE_EXTRN):
1112 if (bc) {
1113 cs->hw.hfcsx.conn |= 0x10;
1114 cs->hw.hfcsx.sctrl |= SCTRL_B2_ENA;
1115 cs->hw.hfcsx.sctrl_r |= SCTRL_B2_ENA;
1116 cs->hw.hfcsx.int_m1 &= ~(HFCSX_INTS_B2TRANS + HFCSX_INTS_B2REC);
1117 } else {
1118 cs->hw.hfcsx.conn |= 0x02;
1119 cs->hw.hfcsx.sctrl |= SCTRL_B1_ENA;
1120 cs->hw.hfcsx.sctrl_r |= SCTRL_B1_ENA;
1121 cs->hw.hfcsx.int_m1 &= ~(HFCSX_INTS_B1TRANS + HFCSX_INTS_B1REC);
1122 }
1123 break;
1124 }
1125 Write_hfc(cs, HFCSX_SCTRL_E, cs->hw.hfcsx.sctrl_e);
1126 Write_hfc(cs, HFCSX_INT_M1, cs->hw.hfcsx.int_m1);
1127 Write_hfc(cs, HFCSX_SCTRL, cs->hw.hfcsx.sctrl);
1128 Write_hfc(cs, HFCSX_SCTRL_R, cs->hw.hfcsx.sctrl_r);
1129 Write_hfc(cs, HFCSX_CTMT, cs->hw.hfcsx.ctmt);
1130 Write_hfc(cs, HFCSX_CONNECT, cs->hw.hfcsx.conn);
1131 if (mode != L1_MODE_EXTRN) {
1132 reset_fifo(cs, fifo2 ? HFCSX_SEL_B2_RX : HFCSX_SEL_B1_RX);
1133 reset_fifo(cs, fifo2 ? HFCSX_SEL_B2_TX : HFCSX_SEL_B1_TX);
1134 }
1135 }
1136
1137 /******************************/
1138 /* Layer2 -> Layer 1 Transfer */
1139 /******************************/
1140 static void
1141 hfcsx_l2l1(struct PStack *st, int pr, void *arg)
1142 {
1143 struct BCState *bcs = st->l1.bcs;
1144 struct sk_buff *skb = arg;
1145 u_long flags;
1146
1147 switch (pr) {
1148 case (PH_DATA | REQUEST):
1149 spin_lock_irqsave(&bcs->cs->lock, flags);
1150 if (bcs->tx_skb) {
1151 skb_queue_tail(&bcs->squeue, skb);
1152 } else {
1153 bcs->tx_skb = skb;
1154 // test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
1155 bcs->cs->BC_Send_Data(bcs);
1156 }
1157 spin_unlock_irqrestore(&bcs->cs->lock, flags);
1158 break;
1159 case (PH_PULL | INDICATION):
1160 spin_lock_irqsave(&bcs->cs->lock, flags);
1161 if (bcs->tx_skb) {
1162 printk(KERN_WARNING "hfc_l2l1: this shouldn't happen\n");
1163 } else {
1164 // test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
1165 bcs->tx_skb = skb;
1166 bcs->cs->BC_Send_Data(bcs);
1167 }
1168 spin_unlock_irqrestore(&bcs->cs->lock, flags);
1169 break;
1170 case (PH_PULL | REQUEST):
1171 if (!bcs->tx_skb) {
1172 test_and_clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
1173 st->l1.l1l2(st, PH_PULL | CONFIRM, NULL);
1174 } else
1175 test_and_set_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
1176 break;
1177 case (PH_ACTIVATE | REQUEST):
1178 spin_lock_irqsave(&bcs->cs->lock, flags);
1179 test_and_set_bit(BC_FLG_ACTIV, &bcs->Flag);
1180 mode_hfcsx(bcs, st->l1.mode, st->l1.bc);
1181 spin_unlock_irqrestore(&bcs->cs->lock, flags);
1182 l1_msg_b(st, pr, arg);
1183 break;
1184 case (PH_DEACTIVATE | REQUEST):
1185 l1_msg_b(st, pr, arg);
1186 break;
1187 case (PH_DEACTIVATE | CONFIRM):
1188 spin_lock_irqsave(&bcs->cs->lock, flags);
1189 test_and_clear_bit(BC_FLG_ACTIV, &bcs->Flag);
1190 test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
1191 mode_hfcsx(bcs, 0, st->l1.bc);
1192 spin_unlock_irqrestore(&bcs->cs->lock, flags);
1193 st->l1.l1l2(st, PH_DEACTIVATE | CONFIRM, NULL);
1194 break;
1195 }
1196 }
1197
1198 /******************************************/
1199 /* deactivate B-channel access and queues */
1200 /******************************************/
1201 static void
1202 close_hfcsx(struct BCState *bcs)
1203 {
1204 mode_hfcsx(bcs, 0, bcs->channel);
1205 if (test_and_clear_bit(BC_FLG_INIT, &bcs->Flag)) {
1206 skb_queue_purge(&bcs->rqueue);
1207 skb_queue_purge(&bcs->squeue);
1208 if (bcs->tx_skb) {
1209 dev_kfree_skb_any(bcs->tx_skb);
1210 bcs->tx_skb = NULL;
1211 test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
1212 }
1213 }
1214 }
1215
1216 /*************************************/
1217 /* init B-channel queues and control */
1218 /*************************************/
1219 static int
1220 open_hfcsxstate(struct IsdnCardState *cs, struct BCState *bcs)
1221 {
1222 if (!test_and_set_bit(BC_FLG_INIT, &bcs->Flag)) {
1223 skb_queue_head_init(&bcs->rqueue);
1224 skb_queue_head_init(&bcs->squeue);
1225 }
1226 bcs->tx_skb = NULL;
1227 test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
1228 bcs->event = 0;
1229 bcs->tx_cnt = 0;
1230 return (0);
1231 }
1232
1233 /*********************************/
1234 /* inits the stack for B-channel */
1235 /*********************************/
1236 static int
1237 setstack_2b(struct PStack *st, struct BCState *bcs)
1238 {
1239 bcs->channel = st->l1.bc;
1240 if (open_hfcsxstate(st->l1.hardware, bcs))
1241 return (-1);
1242 st->l1.bcs = bcs;
1243 st->l2.l2l1 = hfcsx_l2l1;
1244 setstack_manager(st);
1245 bcs->st = st;
1246 setstack_l1_B(st);
1247 return (0);
1248 }
1249
1250 /***************************/
1251 /* handle L1 state changes */
1252 /***************************/
1253 static void
1254 hfcsx_bh(struct work_struct *work)
1255 {
1256 struct IsdnCardState *cs =
1257 container_of(work, struct IsdnCardState, tqueue);
1258 u_long flags;
1259
1260 if (test_and_clear_bit(D_L1STATECHANGE, &cs->event)) {
1261 if (!cs->hw.hfcsx.nt_mode)
1262 switch (cs->dc.hfcsx.ph_state) {
1263 case (0):
1264 l1_msg(cs, HW_RESET | INDICATION, NULL);
1265 break;
1266 case (3):
1267 l1_msg(cs, HW_DEACTIVATE | INDICATION, NULL);
1268 break;
1269 case (8):
1270 l1_msg(cs, HW_RSYNC | INDICATION, NULL);
1271 break;
1272 case (6):
1273 l1_msg(cs, HW_INFO2 | INDICATION, NULL);
1274 break;
1275 case (7):
1276 l1_msg(cs, HW_INFO4_P8 | INDICATION, NULL);
1277 break;
1278 default:
1279 break;
1280 } else {
1281 switch (cs->dc.hfcsx.ph_state) {
1282 case (2):
1283 spin_lock_irqsave(&cs->lock, flags);
1284 if (cs->hw.hfcsx.nt_timer < 0) {
1285 cs->hw.hfcsx.nt_timer = 0;
1286 cs->hw.hfcsx.int_m1 &= ~HFCSX_INTS_TIMER;
1287 Write_hfc(cs, HFCSX_INT_M1, cs->hw.hfcsx.int_m1);
1288 /* Clear already pending ints */
1289 if (Read_hfc(cs, HFCSX_INT_S1));
1290
1291 Write_hfc(cs, HFCSX_STATES, 4 | HFCSX_LOAD_STATE);
1292 udelay(10);
1293 Write_hfc(cs, HFCSX_STATES, 4);
1294 cs->dc.hfcsx.ph_state = 4;
1295 } else {
1296 cs->hw.hfcsx.int_m1 |= HFCSX_INTS_TIMER;
1297 Write_hfc(cs, HFCSX_INT_M1, cs->hw.hfcsx.int_m1);
1298 cs->hw.hfcsx.ctmt &= ~HFCSX_AUTO_TIMER;
1299 cs->hw.hfcsx.ctmt |= HFCSX_TIM3_125;
1300 Write_hfc(cs, HFCSX_CTMT, cs->hw.hfcsx.ctmt | HFCSX_CLTIMER);
1301 Write_hfc(cs, HFCSX_CTMT, cs->hw.hfcsx.ctmt | HFCSX_CLTIMER);
1302 cs->hw.hfcsx.nt_timer = NT_T1_COUNT;
1303 Write_hfc(cs, HFCSX_STATES, 2 | HFCSX_NT_G2_G3); /* allow G2 -> G3 transition */
1304 }
1305 spin_unlock_irqrestore(&cs->lock, flags);
1306 break;
1307 case (1):
1308 case (3):
1309 case (4):
1310 spin_lock_irqsave(&cs->lock, flags);
1311 cs->hw.hfcsx.nt_timer = 0;
1312 cs->hw.hfcsx.int_m1 &= ~HFCSX_INTS_TIMER;
1313 Write_hfc(cs, HFCSX_INT_M1, cs->hw.hfcsx.int_m1);
1314 spin_unlock_irqrestore(&cs->lock, flags);
1315 break;
1316 default:
1317 break;
1318 }
1319 }
1320 }
1321 if (test_and_clear_bit(D_RCVBUFREADY, &cs->event))
1322 DChannel_proc_rcv(cs);
1323 if (test_and_clear_bit(D_XMTBUFREADY, &cs->event))
1324 DChannel_proc_xmt(cs);
1325 }
1326
1327
1328 /********************************/
1329 /* called for card init message */
1330 /********************************/
1331 static void inithfcsx(struct IsdnCardState *cs)
1332 {
1333 cs->setstack_d = setstack_hfcsx;
1334 cs->BC_Send_Data = &hfcsx_send_data;
1335 cs->bcs[0].BC_SetStack = setstack_2b;
1336 cs->bcs[1].BC_SetStack = setstack_2b;
1337 cs->bcs[0].BC_Close = close_hfcsx;
1338 cs->bcs[1].BC_Close = close_hfcsx;
1339 mode_hfcsx(cs->bcs, 0, 0);
1340 mode_hfcsx(cs->bcs + 1, 0, 1);
1341 }
1342
1343
1344
1345 /*******************************************/
1346 /* handle card messages from control layer */
1347 /*******************************************/
1348 static int
1349 hfcsx_card_msg(struct IsdnCardState *cs, int mt, void *arg)
1350 {
1351 u_long flags;
1352
1353 if (cs->debug & L1_DEB_ISAC)
1354 debugl1(cs, "HFCSX: card_msg %x", mt);
1355 switch (mt) {
1356 case CARD_RESET:
1357 spin_lock_irqsave(&cs->lock, flags);
1358 reset_hfcsx(cs);
1359 spin_unlock_irqrestore(&cs->lock, flags);
1360 return (0);
1361 case CARD_RELEASE:
1362 release_io_hfcsx(cs);
1363 return (0);
1364 case CARD_INIT:
1365 spin_lock_irqsave(&cs->lock, flags);
1366 inithfcsx(cs);
1367 spin_unlock_irqrestore(&cs->lock, flags);
1368 msleep(80); /* Timeout 80ms */
1369 /* now switch timer interrupt off */
1370 spin_lock_irqsave(&cs->lock, flags);
1371 cs->hw.hfcsx.int_m1 &= ~HFCSX_INTS_TIMER;
1372 Write_hfc(cs, HFCSX_INT_M1, cs->hw.hfcsx.int_m1);
1373 /* reinit mode reg */
1374 Write_hfc(cs, HFCSX_MST_MODE, cs->hw.hfcsx.mst_m);
1375 spin_unlock_irqrestore(&cs->lock, flags);
1376 return (0);
1377 case CARD_TEST:
1378 return (0);
1379 }
1380 return (0);
1381 }
1382
1383 #ifdef __ISAPNP__
1384 static struct isapnp_device_id hfc_ids[] __devinitdata = {
1385 { ISAPNP_VENDOR('T', 'A', 'G'), ISAPNP_FUNCTION(0x2620),
1386 ISAPNP_VENDOR('T', 'A', 'G'), ISAPNP_FUNCTION(0x2620),
1387 (unsigned long) "Teles 16.3c2" },
1388 { 0, }
1389 };
1390
1391 static struct isapnp_device_id *ipid __devinitdata = &hfc_ids[0];
1392 static struct pnp_card *pnp_c __devinitdata = NULL;
1393 #endif
1394
1395 int __devinit
1396 setup_hfcsx(struct IsdnCard *card)
1397 {
1398 struct IsdnCardState *cs = card->cs;
1399 char tmp[64];
1400
1401 strcpy(tmp, hfcsx_revision);
1402 printk(KERN_INFO "HiSax: HFC-SX driver Rev. %s\n", HiSax_getrev(tmp));
1403 #ifdef __ISAPNP__
1404 if (!card->para[1] && isapnp_present()) {
1405 struct pnp_dev *pnp_d;
1406 while(ipid->card_vendor) {
1407 if ((pnp_c = pnp_find_card(ipid->card_vendor,
1408 ipid->card_device, pnp_c))) {
1409 pnp_d = NULL;
1410 if ((pnp_d = pnp_find_dev(pnp_c,
1411 ipid->vendor, ipid->function, pnp_d))) {
1412 int err;
1413
1414 printk(KERN_INFO "HiSax: %s detected\n",
1415 (char *)ipid->driver_data);
1416 pnp_disable_dev(pnp_d);
1417 err = pnp_activate_dev(pnp_d);
1418 if (err<0) {
1419 printk(KERN_WARNING "%s: pnp_activate_dev ret(%d)\n",
1420 __func__, err);
1421 return(0);
1422 }
1423 card->para[1] = pnp_port_start(pnp_d, 0);
1424 card->para[0] = pnp_irq(pnp_d, 0);
1425 if (!card->para[0] || !card->para[1]) {
1426 printk(KERN_ERR "HFC PnP:some resources are missing %ld/%lx\n",
1427 card->para[0], card->para[1]);
1428 pnp_disable_dev(pnp_d);
1429 return(0);
1430 }
1431 break;
1432 } else {
1433 printk(KERN_ERR "HFC PnP: PnP error card found, no device\n");
1434 }
1435 }
1436 ipid++;
1437 pnp_c = NULL;
1438 }
1439 if (!ipid->card_vendor) {
1440 printk(KERN_INFO "HFC PnP: no ISAPnP card found\n");
1441 return(0);
1442 }
1443 }
1444 #endif
1445 cs->hw.hfcsx.base = card->para[1] & 0xfffe;
1446 cs->irq = card->para[0];
1447 cs->hw.hfcsx.int_s1 = 0;
1448 cs->dc.hfcsx.ph_state = 0;
1449 cs->hw.hfcsx.fifo = 255;
1450 if ((cs->typ == ISDN_CTYPE_HFC_SX) ||
1451 (cs->typ == ISDN_CTYPE_HFC_SP_PCMCIA)) {
1452 if ((!cs->hw.hfcsx.base) || !request_region(cs->hw.hfcsx.base, 2, "HFCSX isdn")) {
1453 printk(KERN_WARNING
1454 "HiSax: HFC-SX io-base %#lx already in use\n",
1455 cs->hw.hfcsx.base);
1456 return(0);
1457 }
1458 byteout(cs->hw.hfcsx.base, cs->hw.hfcsx.base & 0xFF);
1459 byteout(cs->hw.hfcsx.base + 1,
1460 ((cs->hw.hfcsx.base >> 8) & 3) | 0x54);
1461 udelay(10);
1462 cs->hw.hfcsx.chip = Read_hfc(cs,HFCSX_CHIP_ID);
1463 switch (cs->hw.hfcsx.chip >> 4) {
1464 case 1:
1465 tmp[0] ='+';
1466 break;
1467 case 9:
1468 tmp[0] ='P';
1469 break;
1470 default:
1471 printk(KERN_WARNING
1472 "HFC-SX: invalid chip id 0x%x\n",
1473 cs->hw.hfcsx.chip >> 4);
1474 release_region(cs->hw.hfcsx.base, 2);
1475 return(0);
1476 }
1477 if (!ccd_sp_irqtab[cs->irq & 0xF]) {
1478 printk(KERN_WARNING
1479 "HFC_SX: invalid irq %d specified\n",cs->irq & 0xF);
1480 release_region(cs->hw.hfcsx.base, 2);
1481 return(0);
1482 }
1483 if (!(cs->hw.hfcsx.extra = (void *)
1484 kmalloc(sizeof(struct hfcsx_extra), GFP_ATOMIC))) {
1485 release_region(cs->hw.hfcsx.base, 2);
1486 printk(KERN_WARNING "HFC-SX: unable to allocate memory\n");
1487 return(0);
1488 }
1489 printk(KERN_INFO "HFC-S%c chip detected at base 0x%x IRQ %d HZ %d\n",
1490 tmp[0], (u_int) cs->hw.hfcsx.base, cs->irq, HZ);
1491 cs->hw.hfcsx.int_m2 = 0; /* disable alle interrupts */
1492 cs->hw.hfcsx.int_m1 = 0;
1493 Write_hfc(cs, HFCSX_INT_M1, cs->hw.hfcsx.int_m1);
1494 Write_hfc(cs, HFCSX_INT_M2, cs->hw.hfcsx.int_m2);
1495 } else
1496 return (0); /* no valid card type */
1497
1498 cs->dbusytimer.function = (void *) hfcsx_dbusy_timer;
1499 cs->dbusytimer.data = (long) cs;
1500 init_timer(&cs->dbusytimer);
1501 INIT_WORK(&cs->tqueue, hfcsx_bh);
1502 cs->readisac = NULL;
1503 cs->writeisac = NULL;
1504 cs->readisacfifo = NULL;
1505 cs->writeisacfifo = NULL;
1506 cs->BC_Read_Reg = NULL;
1507 cs->BC_Write_Reg = NULL;
1508 cs->irq_func = &hfcsx_interrupt;
1509
1510 cs->hw.hfcsx.timer.function = (void *) hfcsx_Timer;
1511 cs->hw.hfcsx.timer.data = (long) cs;
1512 cs->hw.hfcsx.b_fifo_size = 0; /* fifo size still unknown */
1513 cs->hw.hfcsx.cirm = ccd_sp_irqtab[cs->irq & 0xF]; /* RAM not evaluated */
1514 init_timer(&cs->hw.hfcsx.timer);
1515
1516 reset_hfcsx(cs);
1517 cs->cardmsg = &hfcsx_card_msg;
1518 cs->auxcmd = &hfcsx_auxcmd;
1519 return (1);
1520 }
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