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jbd: config_jbd_debug cannot create /proc entry
[linux-2.6/mini2440.git] / drivers / isdn / hisax / hfc4s8s_l1.c
blobab98e135bcbb689eacb0679a50ca1557089f9d55
1 /*************************************************************************/
2 /* $Id: hfc4s8s_l1.c,v 1.10 2005/02/09 16:31:09 martinb1 Exp $ */
3 /* HFC-4S/8S low layer interface for Cologne Chip HFC-4S/8S isdn chips */
4 /* The low layer (L1) is implemented as a loadable module for usage with */
5 /* the HiSax isdn driver for passive cards. */
6 /* */
7 /* Author: Werner Cornelius */
8 /* (C) 2003 Cornelius Consult (werner@cornelius-consult.de) */
9 /* */
10 /* Driver maintained by Cologne Chip */
11 /* - Martin Bachem, support@colognechip.com */
12 /* */
13 /* This driver only works with chip revisions >= 1, older revision 0 */
14 /* engineering samples (only first manufacturer sample cards) will not */
15 /* work and are rejected by the driver. */
16 /* */
17 /* This file distributed under the GNU GPL. */
18 /* */
19 /* See Version History at the end of this file */
20 /* */
21 /*************************************************************************/
22
23 #include <linux/module.h>
24 #include <linux/init.h>
25 #include <linux/pci.h>
26 #include <linux/interrupt.h>
27 #include <linux/delay.h>
28 #include <linux/timer.h>
29 #include <linux/skbuff.h>
30 #include <linux/wait.h>
31 #include <asm/io.h>
32 #include "hisax_if.h"
33 #include "hfc4s8s_l1.h"
34
35 static const char hfc4s8s_rev[] = "Revision: 1.10";
36
37 /***************************************************************/
38 /* adjustable transparent mode fifo threshold */
39 /* The value defines the used fifo threshold with the equation */
40 /* */
41 /* notify number of bytes = 2 * 2 ^ TRANS_FIFO_THRES */
42 /* */
43 /* The default value is 5 which results in a buffer size of 64 */
44 /* and an interrupt rate of 8ms. */
45 /* The maximum value is 7 due to fifo size restrictions. */
46 /* Values below 3-4 are not recommended due to high interrupt */
47 /* load of the processor. For non critical applications the */
48 /* value should be raised to 7 to reduce any interrupt overhead*/
49 /***************************************************************/
50 #define TRANS_FIFO_THRES 5
51
52 /*************/
53 /* constants */
54 /*************/
55 #define CLOCKMODE_0 0 /* ext. 24.576 MhZ clk freq, int. single clock mode */
56 #define CLOCKMODE_1 1 /* ext. 49.576 MhZ clk freq, int. single clock mode */
57 #define CHIP_ID_SHIFT 4
58 #define HFC_MAX_ST 8
59 #define MAX_D_FRAME_SIZE 270
60 #define MAX_B_FRAME_SIZE 1536
61 #define TRANS_TIMER_MODE (TRANS_FIFO_THRES & 0xf)
62 #define TRANS_FIFO_BYTES (2 << TRANS_FIFO_THRES)
63 #define MAX_F_CNT 0x0f
64
65 #define CLKDEL_NT 0x6c
66 #define CLKDEL_TE 0xf
67 #define CTRL0_NT 4
68 #define CTRL0_TE 0
69
70 #define L1_TIMER_T4 2 /* minimum in jiffies */
71 #define L1_TIMER_T3 (7 * HZ) /* activation timeout */
72 #define L1_TIMER_T1 ((120 * HZ) / 1000) /* NT mode deactivation timeout */
73
74
75 /******************/
76 /* types and vars */
77 /******************/
78 static int card_cnt;
79
80 /* private driver_data */
81 typedef struct {
82 int chip_id;
83 int clock_mode;
84 int max_st_ports;
85 char *device_name;
86 } hfc4s8s_param;
87
88 static struct pci_device_id hfc4s8s_ids[] = {
89 {.vendor = PCI_VENDOR_ID_CCD,
90 .device = PCI_DEVICE_ID_4S,
91 .subvendor = 0x1397,
92 .subdevice = 0x08b4,
93 .driver_data =
94 (unsigned long) &((hfc4s8s_param) {CHIP_ID_4S, CLOCKMODE_0, 4,
95 "HFC-4S Evaluation Board"}),
96 },
97 {.vendor = PCI_VENDOR_ID_CCD,
98 .device = PCI_DEVICE_ID_8S,
99 .subvendor = 0x1397,
100 .subdevice = 0x16b8,
101 .driver_data =
102 (unsigned long) &((hfc4s8s_param) {CHIP_ID_8S, CLOCKMODE_0, 8,
103 "HFC-8S Evaluation Board"}),
104 },
105 {.vendor = PCI_VENDOR_ID_CCD,
106 .device = PCI_DEVICE_ID_4S,
107 .subvendor = 0x1397,
108 .subdevice = 0xb520,
109 .driver_data =
110 (unsigned long) &((hfc4s8s_param) {CHIP_ID_4S, CLOCKMODE_1, 4,
111 "IOB4ST"}),
112 },
113 {.vendor = PCI_VENDOR_ID_CCD,
114 .device = PCI_DEVICE_ID_8S,
115 .subvendor = 0x1397,
116 .subdevice = 0xb522,
117 .driver_data =
118 (unsigned long) &((hfc4s8s_param) {CHIP_ID_8S, CLOCKMODE_1, 8,
119 "IOB8ST"}),
120 },
121 {}
122 };
123
124 MODULE_DEVICE_TABLE(pci, hfc4s8s_ids);
125
126 MODULE_AUTHOR("Werner Cornelius, werner@cornelius-consult.de");
127 MODULE_DESCRIPTION("ISDN layer 1 for Cologne Chip HFC-4S/8S chips");
128 MODULE_LICENSE("GPL");
129
130 /***********/
131 /* layer 1 */
132 /***********/
133 struct hfc4s8s_btype {
134 spinlock_t lock;
135 struct hisax_b_if b_if;
136 struct hfc4s8s_l1 *l1p;
137 struct sk_buff_head tx_queue;
138 struct sk_buff *tx_skb;
139 struct sk_buff *rx_skb;
140 __u8 *rx_ptr;
141 int tx_cnt;
142 int bchan;
143 int mode;
144 };
145
146 struct _hfc4s8s_hw;
147
148 struct hfc4s8s_l1 {
149 spinlock_t lock;
150 struct _hfc4s8s_hw *hw; /* pointer to hardware area */
151 int l1_state; /* actual l1 state */
152 struct timer_list l1_timer; /* layer 1 timer structure */
153 int nt_mode; /* set to nt mode */
154 int st_num; /* own index */
155 int enabled; /* interface is enabled */
156 struct sk_buff_head d_tx_queue; /* send queue */
157 int tx_cnt; /* bytes to send */
158 struct hisax_d_if d_if; /* D-channel interface */
159 struct hfc4s8s_btype b_ch[2]; /* B-channel data */
160 struct hisax_b_if *b_table[2];
161 };
162
163 /**********************/
164 /* hardware structure */
165 /**********************/
166 typedef struct _hfc4s8s_hw {
167 spinlock_t lock;
168
169 int cardnum;
170 int ifnum;
171 int iobase;
172 int nt_mode;
173 u_char *membase;
174 u_char *hw_membase;
175 void *pdev;
176 int max_fifo;
177 hfc4s8s_param driver_data;
178 int irq;
179 int fifo_sched_cnt;
180 struct work_struct tqueue;
181 struct hfc4s8s_l1 l1[HFC_MAX_ST];
182 char card_name[60];
183 struct {
184 u_char r_irq_ctrl;
185 u_char r_ctrl0;
186 volatile u_char r_irq_statech; /* active isdn l1 status */
187 u_char r_irqmsk_statchg; /* enabled isdn status ints */
188 u_char r_irq_fifo_blx[8]; /* fifo status registers */
189 u_char fifo_rx_trans_enables[8]; /* mask for enabled transparent rx fifos */
190 u_char fifo_slow_timer_service[8]; /* mask for fifos needing slower timer service */
191 volatile u_char r_irq_oview; /* contents of overview register */
192 volatile u_char timer_irq;
193 int timer_usg_cnt; /* number of channels using timer */
194 } mr;
195 } hfc4s8s_hw;
196
197
198
199 /***************************/
200 /* inline function defines */
201 /***************************/
202 #ifdef HISAX_HFC4S8S_PCIMEM /* inline functions memory mapped */
203
204 /* memory write and dummy IO read to avoid PCI byte merge problems */
205 #define Write_hfc8(a,b,c) {(*((volatile u_char *)(a->membase+b)) = c); inb(a->iobase+4);}
206 /* memory write without dummy IO access for fifo data access */
207 #define fWrite_hfc8(a,b,c) (*((volatile u_char *)(a->membase+b)) = c)
208 #define Read_hfc8(a,b) (*((volatile u_char *)(a->membase+b)))
209 #define Write_hfc16(a,b,c) (*((volatile unsigned short *)(a->membase+b)) = c)
210 #define Read_hfc16(a,b) (*((volatile unsigned short *)(a->membase+b)))
211 #define Write_hfc32(a,b,c) (*((volatile unsigned long *)(a->membase+b)) = c)
212 #define Read_hfc32(a,b) (*((volatile unsigned long *)(a->membase+b)))
213 #define wait_busy(a) {while ((Read_hfc8(a, R_STATUS) & M_BUSY));}
214 #define PCI_ENA_MEMIO 0x03
215
216 #else
217
218 /* inline functions io mapped */
219 static inline void
220 SetRegAddr(hfc4s8s_hw * a, u_char b)
221 {
222 outb(b, (a->iobase) + 4);
223 }
224
225 static inline u_char
226 GetRegAddr(hfc4s8s_hw * a)
227 {
228 return (inb((volatile u_int) (a->iobase + 4)));
229 }
230
231
232 static inline void
233 Write_hfc8(hfc4s8s_hw * a, u_char b, u_char c)
234 {
235 SetRegAddr(a, b);
236 outb(c, a->iobase);
237 }
238
239 static inline void
240 fWrite_hfc8(hfc4s8s_hw * a, u_char c)
241 {
242 outb(c, a->iobase);
243 }
244
245 static inline void
246 Write_hfc16(hfc4s8s_hw * a, u_char b, u_short c)
247 {
248 SetRegAddr(a, b);
249 outw(c, a->iobase);
250 }
251
252 static inline void
253 Write_hfc32(hfc4s8s_hw * a, u_char b, u_long c)
254 {
255 SetRegAddr(a, b);
256 outl(c, a->iobase);
257 }
258
259 static inline void
260 fWrite_hfc32(hfc4s8s_hw * a, u_long c)
261 {
262 outl(c, a->iobase);
263 }
264
265 static inline u_char
266 Read_hfc8(hfc4s8s_hw * a, u_char b)
267 {
268 SetRegAddr(a, b);
269 return (inb((volatile u_int) a->iobase));
270 }
271
272 static inline u_char
273 fRead_hfc8(hfc4s8s_hw * a)
274 {
275 return (inb((volatile u_int) a->iobase));
276 }
277
278
279 static inline u_short
280 Read_hfc16(hfc4s8s_hw * a, u_char b)
281 {
282 SetRegAddr(a, b);
283 return (inw((volatile u_int) a->iobase));
284 }
285
286 static inline u_long
287 Read_hfc32(hfc4s8s_hw * a, u_char b)
288 {
289 SetRegAddr(a, b);
290 return (inl((volatile u_int) a->iobase));
291 }
292
293 static inline u_long
294 fRead_hfc32(hfc4s8s_hw * a)
295 {
296 return (inl((volatile u_int) a->iobase));
297 }
298
299 static inline void
300 wait_busy(hfc4s8s_hw * a)
301 {
302 SetRegAddr(a, R_STATUS);
303 while (inb((volatile u_int) a->iobase) & M_BUSY);
304 }
305
306 #define PCI_ENA_REGIO 0x01
307
308 #endif /* HISAX_HFC4S8S_PCIMEM */
309
310 /******************************************************/
311 /* function to read critical counter registers that */
312 /* may be udpated by the chip during read */
313 /******************************************************/
314 static u_char
315 Read_hfc8_stable(hfc4s8s_hw * hw, int reg)
316 {
317 u_char ref8;
318 u_char in8;
319 ref8 = Read_hfc8(hw, reg);
320 while (((in8 = Read_hfc8(hw, reg)) != ref8)) {
321 ref8 = in8;
322 }
323 return in8;
324 }
325
326 static int
327 Read_hfc16_stable(hfc4s8s_hw * hw, int reg)
328 {
329 int ref16;
330 int in16;
331
332 ref16 = Read_hfc16(hw, reg);
333 while (((in16 = Read_hfc16(hw, reg)) != ref16)) {
334 ref16 = in16;
335 }
336 return in16;
337 }
338
339 /*****************************/
340 /* D-channel call from HiSax */
341 /*****************************/
342 static void
343 dch_l2l1(struct hisax_d_if *iface, int pr, void *arg)
344 {
345 struct hfc4s8s_l1 *l1 = iface->ifc.priv;
346 struct sk_buff *skb = (struct sk_buff *) arg;
347 u_long flags;
348
349 switch (pr) {
350
351 case (PH_DATA | REQUEST):
352 if (!l1->enabled) {
353 dev_kfree_skb(skb);
354 break;
355 }
356 spin_lock_irqsave(&l1->lock, flags);
357 skb_queue_tail(&l1->d_tx_queue, skb);
358 if ((skb_queue_len(&l1->d_tx_queue) == 1) &&
359 (l1->tx_cnt <= 0)) {
360 l1->hw->mr.r_irq_fifo_blx[l1->st_num] |=
361 0x10;
362 spin_unlock_irqrestore(&l1->lock, flags);
363 schedule_work(&l1->hw->tqueue);
364 } else
365 spin_unlock_irqrestore(&l1->lock, flags);
366 break;
367
368 case (PH_ACTIVATE | REQUEST):
369 if (!l1->enabled)
370 break;
371 if (!l1->nt_mode) {
372 if (l1->l1_state < 6) {
373 spin_lock_irqsave(&l1->lock,
374 flags);
375
376 Write_hfc8(l1->hw, R_ST_SEL,
377 l1->st_num);
378 Write_hfc8(l1->hw, A_ST_WR_STA,
379 0x60);
380 mod_timer(&l1->l1_timer,
381 jiffies + L1_TIMER_T3);
382 spin_unlock_irqrestore(&l1->lock,
383 flags);
384 } else if (l1->l1_state == 7)
385 l1->d_if.ifc.l1l2(&l1->d_if.ifc,
386 PH_ACTIVATE |
387 INDICATION,
388 NULL);
389 } else {
390 if (l1->l1_state != 3) {
391 spin_lock_irqsave(&l1->lock,
392 flags);
393 Write_hfc8(l1->hw, R_ST_SEL,
394 l1->st_num);
395 Write_hfc8(l1->hw, A_ST_WR_STA,
396 0x60);
397 spin_unlock_irqrestore(&l1->lock,
398 flags);
399 } else if (l1->l1_state == 3)
400 l1->d_if.ifc.l1l2(&l1->d_if.ifc,
401 PH_ACTIVATE |
402 INDICATION,
403 NULL);
404 }
405 break;
406
407 default:
408 printk(KERN_INFO
409 "HFC-4S/8S: Unknown D-chan cmd 0x%x received, ignored\n",
410 pr);
411 break;
412 }
413 if (!l1->enabled)
414 l1->d_if.ifc.l1l2(&l1->d_if.ifc,
415 PH_DEACTIVATE | INDICATION, NULL);
416 } /* dch_l2l1 */
417
418 /*****************************/
419 /* B-channel call from HiSax */
420 /*****************************/
421 static void
422 bch_l2l1(struct hisax_if *ifc, int pr, void *arg)
423 {
424 struct hfc4s8s_btype *bch = ifc->priv;
425 struct hfc4s8s_l1 *l1 = bch->l1p;
426 struct sk_buff *skb = (struct sk_buff *) arg;
427 long mode = (long) arg;
428 u_long flags;
429
430 switch (pr) {
431
432 case (PH_DATA | REQUEST):
433 if (!l1->enabled || (bch->mode == L1_MODE_NULL)) {
434 dev_kfree_skb(skb);
435 break;
436 }
437 spin_lock_irqsave(&l1->lock, flags);
438 skb_queue_tail(&bch->tx_queue, skb);
439 if (!bch->tx_skb && (bch->tx_cnt <= 0)) {
440 l1->hw->mr.r_irq_fifo_blx[l1->st_num] |=
441 ((bch->bchan == 1) ? 1 : 4);
442 spin_unlock_irqrestore(&l1->lock, flags);
443 schedule_work(&l1->hw->tqueue);
444 } else
445 spin_unlock_irqrestore(&l1->lock, flags);
446 break;
447
448 case (PH_ACTIVATE | REQUEST):
449 case (PH_DEACTIVATE | REQUEST):
450 if (!l1->enabled)
451 break;
452 if (pr == (PH_DEACTIVATE | REQUEST))
453 mode = L1_MODE_NULL;
454
455 switch (mode) {
456 case L1_MODE_HDLC:
457 spin_lock_irqsave(&l1->lock,
458 flags);
459 l1->hw->mr.timer_usg_cnt++;
460 l1->hw->mr.
461 fifo_slow_timer_service[l1->
462 st_num]
463 |=
464 ((bch->bchan ==
465 1) ? 0x2 : 0x8);
466 Write_hfc8(l1->hw, R_FIFO,
467 (l1->st_num * 8 +
468 ((bch->bchan ==
469 1) ? 0 : 2)));
470 wait_busy(l1->hw);
471 Write_hfc8(l1->hw, A_CON_HDLC, 0xc); /* HDLC mode, flag fill, connect ST */
472 Write_hfc8(l1->hw, A_SUBCH_CFG, 0); /* 8 bits */
473 Write_hfc8(l1->hw, A_IRQ_MSK, 1); /* enable TX interrupts for hdlc */
474 Write_hfc8(l1->hw, A_INC_RES_FIFO, 2); /* reset fifo */
475 wait_busy(l1->hw);
476
477 Write_hfc8(l1->hw, R_FIFO,
478 (l1->st_num * 8 +
479 ((bch->bchan ==
480 1) ? 1 : 3)));
481 wait_busy(l1->hw);
482 Write_hfc8(l1->hw, A_CON_HDLC, 0xc); /* HDLC mode, flag fill, connect ST */
483 Write_hfc8(l1->hw, A_SUBCH_CFG, 0); /* 8 bits */
484 Write_hfc8(l1->hw, A_IRQ_MSK, 1); /* enable RX interrupts for hdlc */
485 Write_hfc8(l1->hw, A_INC_RES_FIFO, 2); /* reset fifo */
486
487 Write_hfc8(l1->hw, R_ST_SEL,
488 l1->st_num);
489 l1->hw->mr.r_ctrl0 |=
490 (bch->bchan & 3);
491 Write_hfc8(l1->hw, A_ST_CTRL0,
492 l1->hw->mr.r_ctrl0);
493 bch->mode = L1_MODE_HDLC;
494 spin_unlock_irqrestore(&l1->lock,
495 flags);
496
497 bch->b_if.ifc.l1l2(&bch->b_if.ifc,
498 PH_ACTIVATE |
499 INDICATION,
500 NULL);
501 break;
502
503 case L1_MODE_TRANS:
504 spin_lock_irqsave(&l1->lock,
505 flags);
506 l1->hw->mr.
507 fifo_rx_trans_enables[l1->
508 st_num]
509 |=
510 ((bch->bchan ==
511 1) ? 0x2 : 0x8);
512 l1->hw->mr.timer_usg_cnt++;
513 Write_hfc8(l1->hw, R_FIFO,
514 (l1->st_num * 8 +
515 ((bch->bchan ==
516 1) ? 0 : 2)));
517 wait_busy(l1->hw);
518 Write_hfc8(l1->hw, A_CON_HDLC, 0xf); /* Transparent mode, 1 fill, connect ST */
519 Write_hfc8(l1->hw, A_SUBCH_CFG, 0); /* 8 bits */
520 Write_hfc8(l1->hw, A_IRQ_MSK, 0); /* disable TX interrupts */
521 Write_hfc8(l1->hw, A_INC_RES_FIFO, 2); /* reset fifo */
522 wait_busy(l1->hw);
523
524 Write_hfc8(l1->hw, R_FIFO,
525 (l1->st_num * 8 +
526 ((bch->bchan ==
527 1) ? 1 : 3)));
528 wait_busy(l1->hw);
529 Write_hfc8(l1->hw, A_CON_HDLC, 0xf); /* Transparent mode, 1 fill, connect ST */
530 Write_hfc8(l1->hw, A_SUBCH_CFG, 0); /* 8 bits */
531 Write_hfc8(l1->hw, A_IRQ_MSK, 0); /* disable RX interrupts */
532 Write_hfc8(l1->hw, A_INC_RES_FIFO, 2); /* reset fifo */
533
534 Write_hfc8(l1->hw, R_ST_SEL,
535 l1->st_num);
536 l1->hw->mr.r_ctrl0 |=
537 (bch->bchan & 3);
538 Write_hfc8(l1->hw, A_ST_CTRL0,
539 l1->hw->mr.r_ctrl0);
540 bch->mode = L1_MODE_TRANS;
541 spin_unlock_irqrestore(&l1->lock,
542 flags);
543
544 bch->b_if.ifc.l1l2(&bch->b_if.ifc,
545 PH_ACTIVATE |
546 INDICATION,
547 NULL);
548 break;
549
550 default:
551 if (bch->mode == L1_MODE_NULL)
552 break;
553 spin_lock_irqsave(&l1->lock,
554 flags);
555 l1->hw->mr.
556 fifo_slow_timer_service[l1->
557 st_num]
558 &=
559 ~((bch->bchan ==
560 1) ? 0x3 : 0xc);
561 l1->hw->mr.
562 fifo_rx_trans_enables[l1->
563 st_num]
564 &=
565 ~((bch->bchan ==
566 1) ? 0x3 : 0xc);
567 l1->hw->mr.timer_usg_cnt--;
568 Write_hfc8(l1->hw, R_FIFO,
569 (l1->st_num * 8 +
570 ((bch->bchan ==
571 1) ? 0 : 2)));
572 wait_busy(l1->hw);
573 Write_hfc8(l1->hw, A_IRQ_MSK, 0); /* disable TX interrupts */
574 wait_busy(l1->hw);
575 Write_hfc8(l1->hw, R_FIFO,
576 (l1->st_num * 8 +
577 ((bch->bchan ==
578 1) ? 1 : 3)));
579 wait_busy(l1->hw);
580 Write_hfc8(l1->hw, A_IRQ_MSK, 0); /* disable RX interrupts */
581 Write_hfc8(l1->hw, R_ST_SEL,
582 l1->st_num);
583 l1->hw->mr.r_ctrl0 &=
584 ~(bch->bchan & 3);
585 Write_hfc8(l1->hw, A_ST_CTRL0,
586 l1->hw->mr.r_ctrl0);
587 spin_unlock_irqrestore(&l1->lock,
588 flags);
589
590 bch->mode = L1_MODE_NULL;
591 bch->b_if.ifc.l1l2(&bch->b_if.ifc,
592 PH_DEACTIVATE |
593 INDICATION,
594 NULL);
595 if (bch->tx_skb) {
596 dev_kfree_skb(bch->tx_skb);
597 bch->tx_skb = NULL;
598 }
599 if (bch->rx_skb) {
600 dev_kfree_skb(bch->rx_skb);
601 bch->rx_skb = NULL;
602 }
603 skb_queue_purge(&bch->tx_queue);
604 bch->tx_cnt = 0;
605 bch->rx_ptr = NULL;
606 break;
607 }
608
609 /* timer is only used when at least one b channel */
610 /* is set up to transparent mode */
611 if (l1->hw->mr.timer_usg_cnt) {
612 Write_hfc8(l1->hw, R_IRQMSK_MISC,
613 M_TI_IRQMSK);
614 } else {
615 Write_hfc8(l1->hw, R_IRQMSK_MISC, 0);
616 }
617
618 break;
619
620 default:
621 printk(KERN_INFO
622 "HFC-4S/8S: Unknown B-chan cmd 0x%x received, ignored\n",
623 pr);
624 break;
625 }
626 if (!l1->enabled)
627 bch->b_if.ifc.l1l2(&bch->b_if.ifc,
628 PH_DEACTIVATE | INDICATION, NULL);
629 } /* bch_l2l1 */
630
631 /**************************/
632 /* layer 1 timer function */
633 /**************************/
634 static void
635 hfc_l1_timer(struct hfc4s8s_l1 *l1)
636 {
637 u_long flags;
638
639 if (!l1->enabled)
640 return;
641
642 spin_lock_irqsave(&l1->lock, flags);
643 if (l1->nt_mode) {
644 l1->l1_state = 1;
645 Write_hfc8(l1->hw, R_ST_SEL, l1->st_num);
646 Write_hfc8(l1->hw, A_ST_WR_STA, 0x11);
647 spin_unlock_irqrestore(&l1->lock, flags);
648 l1->d_if.ifc.l1l2(&l1->d_if.ifc,
649 PH_DEACTIVATE | INDICATION, NULL);
650 spin_lock_irqsave(&l1->lock, flags);
651 l1->l1_state = 1;
652 Write_hfc8(l1->hw, A_ST_WR_STA, 0x1);
653 spin_unlock_irqrestore(&l1->lock, flags);
654 } else {
655 /* activation timed out */
656 Write_hfc8(l1->hw, R_ST_SEL, l1->st_num);
657 Write_hfc8(l1->hw, A_ST_WR_STA, 0x13);
658 spin_unlock_irqrestore(&l1->lock, flags);
659 l1->d_if.ifc.l1l2(&l1->d_if.ifc,
660 PH_DEACTIVATE | INDICATION, NULL);
661 spin_lock_irqsave(&l1->lock, flags);
662 Write_hfc8(l1->hw, R_ST_SEL, l1->st_num);
663 Write_hfc8(l1->hw, A_ST_WR_STA, 0x3);
664 spin_unlock_irqrestore(&l1->lock, flags);
665 }
666 } /* hfc_l1_timer */
667
668 /****************************************/
669 /* a complete D-frame has been received */
670 /****************************************/
671 static void
672 rx_d_frame(struct hfc4s8s_l1 *l1p, int ech)
673 {
674 int z1, z2;
675 u_char f1, f2, df;
676 struct sk_buff *skb;
677 u_char *cp;
678
679
680 if (!l1p->enabled)
681 return;
682 do {
683 /* E/D RX fifo */
684 Write_hfc8(l1p->hw, R_FIFO,
685 (l1p->st_num * 8 + ((ech) ? 7 : 5)));
686 wait_busy(l1p->hw);
687
688 f1 = Read_hfc8_stable(l1p->hw, A_F1);
689 f2 = Read_hfc8(l1p->hw, A_F2);
690 df = f1 - f2;
691 if ((f1 - f2) < 0)
692 df = f1 - f2 + MAX_F_CNT + 1;
693
694
695 if (!df) {
696 return; /* no complete frame in fifo */
697 }
698
699 z1 = Read_hfc16_stable(l1p->hw, A_Z1);
700 z2 = Read_hfc16(l1p->hw, A_Z2);
701
702 z1 = z1 - z2 + 1;
703 if (z1 < 0)
704 z1 += 384;
705
706 if (!(skb = dev_alloc_skb(MAX_D_FRAME_SIZE))) {
707 printk(KERN_INFO
708 "HFC-4S/8S: Could not allocate D/E "
709 "channel receive buffer");
710 Write_hfc8(l1p->hw, A_INC_RES_FIFO, 2);
711 wait_busy(l1p->hw);
712 return;
713 }
714
715 if (((z1 < 4) || (z1 > MAX_D_FRAME_SIZE))) {
716 if (skb)
717 dev_kfree_skb(skb);
718 /* remove errornous D frame */
719 if (df == 1) {
720 /* reset fifo */
721 Write_hfc8(l1p->hw, A_INC_RES_FIFO, 2);
722 wait_busy(l1p->hw);
723 return;
724 } else {
725 /* read errornous D frame */
726
727 #ifndef HISAX_HFC4S8S_PCIMEM
728 SetRegAddr(l1p->hw, A_FIFO_DATA0);
729 #endif
730
731 while (z1 >= 4) {
732 #ifdef HISAX_HFC4S8S_PCIMEM
733 Read_hfc32(l1p->hw, A_FIFO_DATA0);
734 #else
735 fRead_hfc32(l1p->hw);
736 #endif
737 z1 -= 4;
738 }
739
740 while (z1--)
741 #ifdef HISAX_HFC4S8S_PCIMEM
742 Read_hfc8(l1p->hw, A_FIFO_DATA0);
743 #else
744 fRead_hfc8(l1p->hw);
745 #endif
746
747 Write_hfc8(l1p->hw, A_INC_RES_FIFO, 1);
748 wait_busy(l1p->hw);
749 return;
750 }
751 }
752
753 cp = skb->data;
754
755 #ifndef HISAX_HFC4S8S_PCIMEM
756 SetRegAddr(l1p->hw, A_FIFO_DATA0);
757 #endif
758
759 while (z1 >= 4) {
760 #ifdef HISAX_HFC4S8S_PCIMEM
761 *((unsigned long *) cp) =
762 Read_hfc32(l1p->hw, A_FIFO_DATA0);
763 #else
764 *((unsigned long *) cp) = fRead_hfc32(l1p->hw);
765 #endif
766 cp += 4;
767 z1 -= 4;
768 }
769
770 while (z1--)
771 #ifdef HISAX_HFC4S8S_PCIMEM
772 *cp++ = Read_hfc8(l1p->hw, A_FIFO_DATA0);
773 #else
774 *cp++ = fRead_hfc8(l1p->hw);
775 #endif
776
777 Write_hfc8(l1p->hw, A_INC_RES_FIFO, 1); /* increment f counter */
778 wait_busy(l1p->hw);
779
780 if (*(--cp)) {
781 dev_kfree_skb(skb);
782 } else {
783 skb->len = (cp - skb->data) - 2;
784 if (ech)
785 l1p->d_if.ifc.l1l2(&l1p->d_if.ifc,
786 PH_DATA_E | INDICATION,
787 skb);
788 else
789 l1p->d_if.ifc.l1l2(&l1p->d_if.ifc,
790 PH_DATA | INDICATION,
791 skb);
792 }
793 } while (1);
794 } /* rx_d_frame */
795
796 /*************************************************************/
797 /* a B-frame has been received (perhaps not fully completed) */
798 /*************************************************************/
799 static void
800 rx_b_frame(struct hfc4s8s_btype *bch)
801 {
802 int z1, z2, hdlc_complete;
803 u_char f1, f2;
804 struct hfc4s8s_l1 *l1 = bch->l1p;
805 struct sk_buff *skb;
806
807 if (!l1->enabled || (bch->mode == L1_MODE_NULL))
808 return;
809
810 do {
811 /* RX Fifo */
812 Write_hfc8(l1->hw, R_FIFO,
813 (l1->st_num * 8 + ((bch->bchan == 1) ? 1 : 3)));
814 wait_busy(l1->hw);
815
816 if (bch->mode == L1_MODE_HDLC) {
817 f1 = Read_hfc8_stable(l1->hw, A_F1);
818 f2 = Read_hfc8(l1->hw, A_F2);
819 hdlc_complete = ((f1 ^ f2) & MAX_F_CNT);
820 } else
821 hdlc_complete = 0;
822 z1 = Read_hfc16_stable(l1->hw, A_Z1);
823 z2 = Read_hfc16(l1->hw, A_Z2);
824 z1 = (z1 - z2);
825 if (hdlc_complete)
826 z1++;
827 if (z1 < 0)
828 z1 += 384;
829
830 if (!z1)
831 break;
832
833 if (!(skb = bch->rx_skb)) {
834 if (!
835 (skb =
836 dev_alloc_skb((bch->mode ==
837 L1_MODE_TRANS) ? z1
838 : (MAX_B_FRAME_SIZE + 3)))) {
839 printk(KERN_ERR
840 "HFC-4S/8S: Could not allocate B "
841 "channel receive buffer");
842 return;
843 }
844 bch->rx_ptr = skb->data;
845 bch->rx_skb = skb;
846 }
847
848 skb->len = (bch->rx_ptr - skb->data) + z1;
849
850 /* HDLC length check */
851 if ((bch->mode == L1_MODE_HDLC) &&
852 ((hdlc_complete && (skb->len < 4)) ||
853 (skb->len > (MAX_B_FRAME_SIZE + 3)))) {
854
855 skb->len = 0;
856 bch->rx_ptr = skb->data;
857 Write_hfc8(l1->hw, A_INC_RES_FIFO, 2); /* reset fifo */
858 wait_busy(l1->hw);
859 return;
860 }
861 #ifndef HISAX_HFC4S8S_PCIMEM
862 SetRegAddr(l1->hw, A_FIFO_DATA0);
863 #endif
864
865 while (z1 >= 4) {
866 #ifdef HISAX_HFC4S8S_PCIMEM
867 *((unsigned long *) bch->rx_ptr) =
868 Read_hfc32(l1->hw, A_FIFO_DATA0);
869 #else
870 *((unsigned long *) bch->rx_ptr) =
871 fRead_hfc32(l1->hw);
872 #endif
873 bch->rx_ptr += 4;
874 z1 -= 4;
875 }
876
877 while (z1--)
878 #ifdef HISAX_HFC4S8S_PCIMEM
879 *(bch->rx_ptr++) = Read_hfc8(l1->hw, A_FIFO_DATA0);
880 #else
881 *(bch->rx_ptr++) = fRead_hfc8(l1->hw);
882 #endif
883
884 if (hdlc_complete) {
885 /* increment f counter */
886 Write_hfc8(l1->hw, A_INC_RES_FIFO, 1);
887 wait_busy(l1->hw);
888
889 /* hdlc crc check */
890 bch->rx_ptr--;
891 if (*bch->rx_ptr) {
892 skb->len = 0;
893 bch->rx_ptr = skb->data;
894 continue;
895 }
896 skb->len -= 3;
897 }
898 if (hdlc_complete || (bch->mode == L1_MODE_TRANS)) {
899 bch->rx_skb = NULL;
900 bch->rx_ptr = NULL;
901 bch->b_if.ifc.l1l2(&bch->b_if.ifc,
902 PH_DATA | INDICATION, skb);
903 }
904
905 } while (1);
906 } /* rx_b_frame */
907
908 /********************************************/
909 /* a D-frame has been/should be transmitted */
910 /********************************************/
911 static void
912 tx_d_frame(struct hfc4s8s_l1 *l1p)
913 {
914 struct sk_buff *skb;
915 u_char f1, f2;
916 u_char *cp;
917 long cnt;
918
919 if (l1p->l1_state != 7)
920 return;
921
922 /* TX fifo */
923 Write_hfc8(l1p->hw, R_FIFO, (l1p->st_num * 8 + 4));
924 wait_busy(l1p->hw);
925
926 f1 = Read_hfc8(l1p->hw, A_F1);
927 f2 = Read_hfc8_stable(l1p->hw, A_F2);
928
929 if ((f1 ^ f2) & MAX_F_CNT)
930 return; /* fifo is still filled */
931
932 if (l1p->tx_cnt > 0) {
933 cnt = l1p->tx_cnt;
934 l1p->tx_cnt = 0;
935 l1p->d_if.ifc.l1l2(&l1p->d_if.ifc, PH_DATA | CONFIRM,
936 (void *) cnt);
937 }
938
939 if ((skb = skb_dequeue(&l1p->d_tx_queue))) {
940 cp = skb->data;
941 cnt = skb->len;
942 #ifndef HISAX_HFC4S8S_PCIMEM
943 SetRegAddr(l1p->hw, A_FIFO_DATA0);
944 #endif
945
946 while (cnt >= 4) {
947 #ifdef HISAX_HFC4S8S_PCIMEM
948 fWrite_hfc32(l1p->hw, A_FIFO_DATA0,
949 *(unsigned long *) cp);
950 #else
951 SetRegAddr(l1p->hw, A_FIFO_DATA0);
952 fWrite_hfc32(l1p->hw, *(unsigned long *) cp);
953 #endif
954 cp += 4;
955 cnt -= 4;
956 }
957
958 #ifdef HISAX_HFC4S8S_PCIMEM
959 while (cnt--)
960 fWrite_hfc8(l1p->hw, A_FIFO_DATA0, *cp++);
961 #else
962 while (cnt--)
963 fWrite_hfc8(l1p->hw, *cp++);
964 #endif
965
966 l1p->tx_cnt = skb->truesize;
967 Write_hfc8(l1p->hw, A_INC_RES_FIFO, 1); /* increment f counter */
968 wait_busy(l1p->hw);
969
970 dev_kfree_skb(skb);
971 }
972 } /* tx_d_frame */
973
974 /******************************************************/
975 /* a B-frame may be transmitted (or is not completed) */
976 /******************************************************/
977 static void
978 tx_b_frame(struct hfc4s8s_btype *bch)
979 {
980 struct sk_buff *skb;
981 struct hfc4s8s_l1 *l1 = bch->l1p;
982 u_char *cp;
983 int cnt, max, hdlc_num;
984 long ack_len = 0;
985
986 if (!l1->enabled || (bch->mode == L1_MODE_NULL))
987 return;
988
989 /* TX fifo */
990 Write_hfc8(l1->hw, R_FIFO,
991 (l1->st_num * 8 + ((bch->bchan == 1) ? 0 : 2)));
992 wait_busy(l1->hw);
993 do {
994
995 if (bch->mode == L1_MODE_HDLC) {
996 hdlc_num = Read_hfc8(l1->hw, A_F1) & MAX_F_CNT;
997 hdlc_num -=
998 (Read_hfc8_stable(l1->hw, A_F2) & MAX_F_CNT);
999 if (hdlc_num < 0)
1000 hdlc_num += 16;
1001 if (hdlc_num >= 15)
1002 break; /* fifo still filled up with hdlc frames */
1003 } else
1004 hdlc_num = 0;
1005
1006 if (!(skb = bch->tx_skb)) {
1007 if (!(skb = skb_dequeue(&bch->tx_queue))) {
1008 l1->hw->mr.fifo_slow_timer_service[l1->
1009 st_num]
1010 &= ~((bch->bchan == 1) ? 1 : 4);
1011 break; /* list empty */
1012 }
1013 bch->tx_skb = skb;
1014 bch->tx_cnt = 0;
1015 }
1016
1017 if (!hdlc_num)
1018 l1->hw->mr.fifo_slow_timer_service[l1->st_num] |=
1019 ((bch->bchan == 1) ? 1 : 4);
1020 else
1021 l1->hw->mr.fifo_slow_timer_service[l1->st_num] &=
1022 ~((bch->bchan == 1) ? 1 : 4);
1023
1024 max = Read_hfc16_stable(l1->hw, A_Z2);
1025 max -= Read_hfc16(l1->hw, A_Z1);
1026 if (max <= 0)
1027 max += 384;
1028 max--;
1029
1030 if (max < 16)
1031 break; /* don't write to small amounts of bytes */
1032
1033 cnt = skb->len - bch->tx_cnt;
1034 if (cnt > max)
1035 cnt = max;
1036 cp = skb->data + bch->tx_cnt;
1037 bch->tx_cnt += cnt;
1038
1039 #ifndef HISAX_HFC4S8S_PCIMEM
1040 SetRegAddr(l1->hw, A_FIFO_DATA0);
1041 #endif
1042 while (cnt >= 4) {
1043 #ifdef HISAX_HFC4S8S_PCIMEM
1044 fWrite_hfc32(l1->hw, A_FIFO_DATA0,
1045 *(unsigned long *) cp);
1046 #else
1047 fWrite_hfc32(l1->hw, *(unsigned long *) cp);
1048 #endif
1049 cp += 4;
1050 cnt -= 4;
1051 }
1052
1053 while (cnt--)
1054 #ifdef HISAX_HFC4S8S_PCIMEM
1055 fWrite_hfc8(l1->hw, A_FIFO_DATA0, *cp++);
1056 #else
1057 fWrite_hfc8(l1->hw, *cp++);
1058 #endif
1059
1060 if (bch->tx_cnt >= skb->len) {
1061 if (bch->mode == L1_MODE_HDLC) {
1062 /* increment f counter */
1063 Write_hfc8(l1->hw, A_INC_RES_FIFO, 1);
1064 }
1065 ack_len += skb->truesize;
1066 bch->tx_skb = NULL;
1067 bch->tx_cnt = 0;
1068 dev_kfree_skb(skb);
1069 } else
1070 /* Re-Select */
1071 Write_hfc8(l1->hw, R_FIFO,
1072 (l1->st_num * 8 +
1073 ((bch->bchan == 1) ? 0 : 2)));
1074 wait_busy(l1->hw);
1075 } while (1);
1076
1077 if (ack_len)
1078 bch->b_if.ifc.l1l2((struct hisax_if *) &bch->b_if,
1079 PH_DATA | CONFIRM, (void *) ack_len);
1080 } /* tx_b_frame */
1081
1082 /*************************************/
1083 /* bottom half handler for interrupt */
1084 /*************************************/
1085 static void
1086 hfc4s8s_bh(struct work_struct *work)
1087 {
1088 hfc4s8s_hw *hw = container_of(work, hfc4s8s_hw, tqueue);
1089 u_char b;
1090 struct hfc4s8s_l1 *l1p;
1091 volatile u_char *fifo_stat;
1092 int idx;
1093
1094 /* handle layer 1 state changes */
1095 b = 1;
1096 l1p = hw->l1;
1097 while (b) {
1098 if ((b & hw->mr.r_irq_statech)) {
1099 /* reset l1 event */
1100 hw->mr.r_irq_statech &= ~b;
1101 if (l1p->enabled) {
1102 if (l1p->nt_mode) {
1103 u_char oldstate = l1p->l1_state;
1104
1105 Write_hfc8(l1p->hw, R_ST_SEL,
1106 l1p->st_num);
1107 l1p->l1_state =
1108 Read_hfc8(l1p->hw,
1109 A_ST_RD_STA) & 0xf;
1110
1111 if ((oldstate == 3)
1112 && (l1p->l1_state != 3))
1113 l1p->d_if.ifc.l1l2(&l1p->
1114 d_if.
1115 ifc,
1116 PH_DEACTIVATE
1117 |
1118 INDICATION,
1119 NULL);
1120
1121 if (l1p->l1_state != 2) {
1122 del_timer(&l1p->l1_timer);
1123 if (l1p->l1_state == 3) {
1124 l1p->d_if.ifc.
1125 l1l2(&l1p->
1126 d_if.ifc,
1127 PH_ACTIVATE
1128 |
1129 INDICATION,
1130 NULL);
1131 }
1132 } else {
1133 /* allow transition */
1134 Write_hfc8(hw, A_ST_WR_STA,
1135 M_SET_G2_G3);
1136 mod_timer(&l1p->l1_timer,
1137 jiffies +
1138 L1_TIMER_T1);
1139 }
1140 printk(KERN_INFO
1141 "HFC-4S/8S: NT ch %d l1 state %d -> %d\n",
1142 l1p->st_num, oldstate,
1143 l1p->l1_state);
1144 } else {
1145 u_char oldstate = l1p->l1_state;
1146
1147 Write_hfc8(l1p->hw, R_ST_SEL,
1148 l1p->st_num);
1149 l1p->l1_state =
1150 Read_hfc8(l1p->hw,
1151 A_ST_RD_STA) & 0xf;
1152
1153 if (((l1p->l1_state == 3) &&
1154 ((oldstate == 7) ||
1155 (oldstate == 8))) ||
1156 ((timer_pending
1157 (&l1p->l1_timer))
1158 && (l1p->l1_state == 8))) {
1159 mod_timer(&l1p->l1_timer,
1160 L1_TIMER_T4 +
1161 jiffies);
1162 } else {
1163 if (l1p->l1_state == 7) {
1164 del_timer(&l1p->
1165 l1_timer);
1166 l1p->d_if.ifc.
1167 l1l2(&l1p->
1168 d_if.ifc,
1169 PH_ACTIVATE
1170 |
1171 INDICATION,
1172 NULL);
1173 tx_d_frame(l1p);
1174 }
1175 if (l1p->l1_state == 3) {
1176 if (oldstate != 3)
1177 l1p->d_if.
1178 ifc.
1179 l1l2
1180 (&l1p->
1181 d_if.
1182 ifc,
1183 PH_DEACTIVATE
1184 |
1185 INDICATION,
1186 NULL);
1187 }
1188 }
1189 printk(KERN_INFO
1190 "HFC-4S/8S: TE %d ch %d l1 state %d -> %d\n",
1191 l1p->hw->cardnum,
1192 l1p->st_num, oldstate,
1193 l1p->l1_state);
1194 }
1195 }
1196 }
1197 b <<= 1;
1198 l1p++;
1199 }
1200
1201 /* now handle the fifos */
1202 idx = 0;
1203 fifo_stat = hw->mr.r_irq_fifo_blx;
1204 l1p = hw->l1;
1205 while (idx < hw->driver_data.max_st_ports) {
1206
1207 if (hw->mr.timer_irq) {
1208 *fifo_stat |= hw->mr.fifo_rx_trans_enables[idx];
1209 if (hw->fifo_sched_cnt <= 0) {
1210 *fifo_stat |=
1211 hw->mr.fifo_slow_timer_service[l1p->
1212 st_num];
1213 }
1214 }
1215 /* ignore fifo 6 (TX E fifo) */
1216 *fifo_stat &= 0xff - 0x40;
1217
1218 while (*fifo_stat) {
1219
1220 if (!l1p->nt_mode) {
1221 /* RX Fifo has data to read */
1222 if ((*fifo_stat & 0x20)) {
1223 *fifo_stat &= ~0x20;
1224 rx_d_frame(l1p, 0);
1225 }
1226 /* E Fifo has data to read */
1227 if ((*fifo_stat & 0x80)) {
1228 *fifo_stat &= ~0x80;
1229 rx_d_frame(l1p, 1);
1230 }
1231 /* TX Fifo completed send */
1232 if ((*fifo_stat & 0x10)) {
1233 *fifo_stat &= ~0x10;
1234 tx_d_frame(l1p);
1235 }
1236 }
1237 /* B1 RX Fifo has data to read */
1238 if ((*fifo_stat & 0x2)) {
1239 *fifo_stat &= ~0x2;
1240 rx_b_frame(l1p->b_ch);
1241 }
1242 /* B1 TX Fifo has send completed */
1243 if ((*fifo_stat & 0x1)) {
1244 *fifo_stat &= ~0x1;
1245 tx_b_frame(l1p->b_ch);
1246 }
1247 /* B2 RX Fifo has data to read */
1248 if ((*fifo_stat & 0x8)) {
1249 *fifo_stat &= ~0x8;
1250 rx_b_frame(l1p->b_ch + 1);
1251 }
1252 /* B2 TX Fifo has send completed */
1253 if ((*fifo_stat & 0x4)) {
1254 *fifo_stat &= ~0x4;
1255 tx_b_frame(l1p->b_ch + 1);
1256 }
1257 }
1258 fifo_stat++;
1259 l1p++;
1260 idx++;
1261 }
1262
1263 if (hw->fifo_sched_cnt <= 0)
1264 hw->fifo_sched_cnt += (1 << (7 - TRANS_TIMER_MODE));
1265 hw->mr.timer_irq = 0; /* clear requested timer irq */
1266 } /* hfc4s8s_bh */
1267
1268 /*********************/
1269 /* interrupt handler */
1270 /*********************/
1271 static irqreturn_t
1272 hfc4s8s_interrupt(int intno, void *dev_id)
1273 {
1274 hfc4s8s_hw *hw = dev_id;
1275 u_char b, ovr;
1276 volatile u_char *ovp;
1277 int idx;
1278 u_char old_ioreg;
1279
1280 if (!hw || !(hw->mr.r_irq_ctrl & M_GLOB_IRQ_EN))
1281 return IRQ_NONE;
1282
1283 #ifndef HISAX_HFC4S8S_PCIMEM
1284 /* read current selected regsister */
1285 old_ioreg = GetRegAddr(hw);
1286 #endif
1287
1288 /* Layer 1 State change */
1289 hw->mr.r_irq_statech |=
1290 (Read_hfc8(hw, R_SCI) & hw->mr.r_irqmsk_statchg);
1291 if (!
1292 (b = (Read_hfc8(hw, R_STATUS) & (M_MISC_IRQSTA | M_FR_IRQSTA)))
1293 && !hw->mr.r_irq_statech) {
1294 #ifndef HISAX_HFC4S8S_PCIMEM
1295 SetRegAddr(hw, old_ioreg);
1296 #endif
1297 return IRQ_NONE;
1298 }
1299
1300 /* timer event */
1301 if (Read_hfc8(hw, R_IRQ_MISC) & M_TI_IRQ) {
1302 hw->mr.timer_irq = 1;
1303 hw->fifo_sched_cnt--;
1304 }
1305
1306 /* FIFO event */
1307 if ((ovr = Read_hfc8(hw, R_IRQ_OVIEW))) {
1308 hw->mr.r_irq_oview |= ovr;
1309 idx = R_IRQ_FIFO_BL0;
1310 ovp = hw->mr.r_irq_fifo_blx;
1311 while (ovr) {
1312 if ((ovr & 1)) {
1313 *ovp |= Read_hfc8(hw, idx);
1314 }
1315 ovp++;
1316 idx++;
1317 ovr >>= 1;
1318 }
1319 }
1320
1321 /* queue the request to allow other cards to interrupt */
1322 schedule_work(&hw->tqueue);
1323
1324 #ifndef HISAX_HFC4S8S_PCIMEM
1325 SetRegAddr(hw, old_ioreg);
1326 #endif
1327 return IRQ_HANDLED;
1328 } /* hfc4s8s_interrupt */
1329
1330 /***********************************************************************/
1331 /* reset the complete chip, don't release the chips irq but disable it */
1332 /***********************************************************************/
1333 static void
1334 chipreset(hfc4s8s_hw * hw)
1335 {
1336 u_long flags;
1337
1338 spin_lock_irqsave(&hw->lock, flags);
1339 Write_hfc8(hw, R_CTRL, 0); /* use internal RAM */
1340 Write_hfc8(hw, R_RAM_MISC, 0); /* 32k*8 RAM */
1341 Write_hfc8(hw, R_FIFO_MD, 0); /* fifo mode 386 byte/fifo simple mode */
1342 Write_hfc8(hw, R_CIRM, M_SRES); /* reset chip */
1343 hw->mr.r_irq_ctrl = 0; /* interrupt is inactive */
1344 spin_unlock_irqrestore(&hw->lock, flags);
1345
1346 udelay(3);
1347 Write_hfc8(hw, R_CIRM, 0); /* disable reset */
1348 wait_busy(hw);
1349
1350 Write_hfc8(hw, R_PCM_MD0, M_PCM_MD); /* master mode */
1351 Write_hfc8(hw, R_RAM_MISC, M_FZ_MD); /* transmit fifo option */
1352 if (hw->driver_data.clock_mode == 1)
1353 Write_hfc8(hw, R_BRG_PCM_CFG, M_PCM_CLK); /* PCM clk / 2 */
1354 Write_hfc8(hw, R_TI_WD, TRANS_TIMER_MODE); /* timer interval */
1355
1356 memset(&hw->mr, 0, sizeof(hw->mr));
1357 } /* chipreset */
1358
1359 /********************************************/
1360 /* disable/enable hardware in nt or te mode */
1361 /********************************************/
1362 static void
1363 hfc_hardware_enable(hfc4s8s_hw * hw, int enable, int nt_mode)
1364 {
1365 u_long flags;
1366 char if_name[40];
1367 int i;
1368
1369 if (enable) {
1370 /* save system vars */
1371 hw->nt_mode = nt_mode;
1372
1373 /* enable fifo and state irqs, but not global irq enable */
1374 hw->mr.r_irq_ctrl = M_FIFO_IRQ;
1375 Write_hfc8(hw, R_IRQ_CTRL, hw->mr.r_irq_ctrl);
1376 hw->mr.r_irqmsk_statchg = 0;
1377 Write_hfc8(hw, R_SCI_MSK, hw->mr.r_irqmsk_statchg);
1378 Write_hfc8(hw, R_PWM_MD, 0x80);
1379 Write_hfc8(hw, R_PWM1, 26);
1380 if (!nt_mode)
1381 Write_hfc8(hw, R_ST_SYNC, M_AUTO_SYNC);
1382
1383 /* enable the line interfaces and fifos */
1384 for (i = 0; i < hw->driver_data.max_st_ports; i++) {
1385 hw->mr.r_irqmsk_statchg |= (1 << i);
1386 Write_hfc8(hw, R_SCI_MSK, hw->mr.r_irqmsk_statchg);
1387 Write_hfc8(hw, R_ST_SEL, i);
1388 Write_hfc8(hw, A_ST_CLK_DLY,
1389 ((nt_mode) ? CLKDEL_NT : CLKDEL_TE));
1390 hw->mr.r_ctrl0 = ((nt_mode) ? CTRL0_NT : CTRL0_TE);
1391 Write_hfc8(hw, A_ST_CTRL0, hw->mr.r_ctrl0);
1392 Write_hfc8(hw, A_ST_CTRL2, 3);
1393 Write_hfc8(hw, A_ST_WR_STA, 0); /* enable state machine */
1394
1395 hw->l1[i].enabled = 1;
1396 hw->l1[i].nt_mode = nt_mode;
1397
1398 if (!nt_mode) {
1399 /* setup E-fifo */
1400 Write_hfc8(hw, R_FIFO, i * 8 + 7); /* E fifo */
1401 wait_busy(hw);
1402 Write_hfc8(hw, A_CON_HDLC, 0x11); /* HDLC mode, 1 fill, connect ST */
1403 Write_hfc8(hw, A_SUBCH_CFG, 2); /* only 2 bits */
1404 Write_hfc8(hw, A_IRQ_MSK, 1); /* enable interrupt */
1405 Write_hfc8(hw, A_INC_RES_FIFO, 2); /* reset fifo */
1406 wait_busy(hw);
1407
1408 /* setup D RX-fifo */
1409 Write_hfc8(hw, R_FIFO, i * 8 + 5); /* RX fifo */
1410 wait_busy(hw);
1411 Write_hfc8(hw, A_CON_HDLC, 0x11); /* HDLC mode, 1 fill, connect ST */
1412 Write_hfc8(hw, A_SUBCH_CFG, 2); /* only 2 bits */
1413 Write_hfc8(hw, A_IRQ_MSK, 1); /* enable interrupt */
1414 Write_hfc8(hw, A_INC_RES_FIFO, 2); /* reset fifo */
1415 wait_busy(hw);
1416
1417 /* setup D TX-fifo */
1418 Write_hfc8(hw, R_FIFO, i * 8 + 4); /* TX fifo */
1419 wait_busy(hw);
1420 Write_hfc8(hw, A_CON_HDLC, 0x11); /* HDLC mode, 1 fill, connect ST */
1421 Write_hfc8(hw, A_SUBCH_CFG, 2); /* only 2 bits */
1422 Write_hfc8(hw, A_IRQ_MSK, 1); /* enable interrupt */
1423 Write_hfc8(hw, A_INC_RES_FIFO, 2); /* reset fifo */
1424 wait_busy(hw);
1425 }
1426
1427 sprintf(if_name, "hfc4s8s_%d%d_", hw->cardnum, i);
1428
1429 if (hisax_register
1430 (&hw->l1[i].d_if, hw->l1[i].b_table, if_name,
1431 ((nt_mode) ? 3 : 2))) {
1432
1433 hw->l1[i].enabled = 0;
1434 hw->mr.r_irqmsk_statchg &= ~(1 << i);
1435 Write_hfc8(hw, R_SCI_MSK,
1436 hw->mr.r_irqmsk_statchg);
1437 printk(KERN_INFO
1438 "HFC-4S/8S: Unable to register S/T device %s, break\n",
1439 if_name);
1440 break;
1441 }
1442 }
1443 spin_lock_irqsave(&hw->lock, flags);
1444 hw->mr.r_irq_ctrl |= M_GLOB_IRQ_EN;
1445 Write_hfc8(hw, R_IRQ_CTRL, hw->mr.r_irq_ctrl);
1446 spin_unlock_irqrestore(&hw->lock, flags);
1447 } else {
1448 /* disable hardware */
1449 spin_lock_irqsave(&hw->lock, flags);
1450 hw->mr.r_irq_ctrl &= ~M_GLOB_IRQ_EN;
1451 Write_hfc8(hw, R_IRQ_CTRL, hw->mr.r_irq_ctrl);
1452 spin_unlock_irqrestore(&hw->lock, flags);
1453
1454 for (i = hw->driver_data.max_st_ports - 1; i >= 0; i--) {
1455 hw->l1[i].enabled = 0;
1456 hisax_unregister(&hw->l1[i].d_if);
1457 del_timer(&hw->l1[i].l1_timer);
1458 skb_queue_purge(&hw->l1[i].d_tx_queue);
1459 skb_queue_purge(&hw->l1[i].b_ch[0].tx_queue);
1460 skb_queue_purge(&hw->l1[i].b_ch[1].tx_queue);
1461 }
1462 chipreset(hw);
1463 }
1464 } /* hfc_hardware_enable */
1465
1466 /******************************************/
1467 /* disable memory mapped ports / io ports */
1468 /******************************************/
1469 static void
1470 release_pci_ports(hfc4s8s_hw * hw)
1471 {
1472 pci_write_config_word(hw->pdev, PCI_COMMAND, 0);
1473 #ifdef HISAX_HFC4S8S_PCIMEM
1474 if (hw->membase)
1475 iounmap((void *) hw->membase);
1476 #else
1477 if (hw->iobase)
1478 release_region(hw->iobase, 8);
1479 #endif
1480 }
1481
1482 /*****************************************/
1483 /* enable memory mapped ports / io ports */
1484 /*****************************************/
1485 static void
1486 enable_pci_ports(hfc4s8s_hw * hw)
1487 {
1488 #ifdef HISAX_HFC4S8S_PCIMEM
1489 pci_write_config_word(hw->pdev, PCI_COMMAND, PCI_ENA_MEMIO);
1490 #else
1491 pci_write_config_word(hw->pdev, PCI_COMMAND, PCI_ENA_REGIO);
1492 #endif
1493 }
1494
1495 /*************************************/
1496 /* initialise the HFC-4s/8s hardware */
1497 /* return 0 on success. */
1498 /*************************************/
1499 static int __devinit
1500 setup_instance(hfc4s8s_hw * hw)
1501 {
1502 int err = -EIO;
1503 int i;
1504
1505 for (i = 0; i < HFC_MAX_ST; i++) {
1506 struct hfc4s8s_l1 *l1p;
1507
1508 l1p = hw->l1 + i;
1509 spin_lock_init(&l1p->lock);
1510 l1p->hw = hw;
1511 l1p->l1_timer.function = (void *) hfc_l1_timer;
1512 l1p->l1_timer.data = (long) (l1p);
1513 init_timer(&l1p->l1_timer);
1514 l1p->st_num = i;
1515 skb_queue_head_init(&l1p->d_tx_queue);
1516 l1p->d_if.ifc.priv = hw->l1 + i;
1517 l1p->d_if.ifc.l2l1 = (void *) dch_l2l1;
1518
1519 spin_lock_init(&l1p->b_ch[0].lock);
1520 l1p->b_ch[0].b_if.ifc.l2l1 = (void *) bch_l2l1;
1521 l1p->b_ch[0].b_if.ifc.priv = (void *) &l1p->b_ch[0];
1522 l1p->b_ch[0].l1p = hw->l1 + i;
1523 l1p->b_ch[0].bchan = 1;
1524 l1p->b_table[0] = &l1p->b_ch[0].b_if;
1525 skb_queue_head_init(&l1p->b_ch[0].tx_queue);
1526
1527 spin_lock_init(&l1p->b_ch[1].lock);
1528 l1p->b_ch[1].b_if.ifc.l2l1 = (void *) bch_l2l1;
1529 l1p->b_ch[1].b_if.ifc.priv = (void *) &l1p->b_ch[1];
1530 l1p->b_ch[1].l1p = hw->l1 + i;
1531 l1p->b_ch[1].bchan = 2;
1532 l1p->b_table[1] = &l1p->b_ch[1].b_if;
1533 skb_queue_head_init(&l1p->b_ch[1].tx_queue);
1534 }
1535
1536 enable_pci_ports(hw);
1537 chipreset(hw);
1538
1539 i = Read_hfc8(hw, R_CHIP_ID) >> CHIP_ID_SHIFT;
1540 if (i != hw->driver_data.chip_id) {
1541 printk(KERN_INFO
1542 "HFC-4S/8S: invalid chip id 0x%x instead of 0x%x, card ignored\n",
1543 i, hw->driver_data.chip_id);
1544 goto out;
1545 }
1546
1547 i = Read_hfc8(hw, R_CHIP_RV) & 0xf;
1548 if (!i) {
1549 printk(KERN_INFO
1550 "HFC-4S/8S: chip revision 0 not supported, card ignored\n");
1551 goto out;
1552 }
1553
1554 INIT_WORK(&hw->tqueue, hfc4s8s_bh);
1555
1556 if (request_irq
1557 (hw->irq, hfc4s8s_interrupt, IRQF_SHARED, hw->card_name, hw)) {
1558 printk(KERN_INFO
1559 "HFC-4S/8S: unable to alloc irq %d, card ignored\n",
1560 hw->irq);
1561 goto out;
1562 }
1563 #ifdef HISAX_HFC4S8S_PCIMEM
1564 printk(KERN_INFO
1565 "HFC-4S/8S: found PCI card at membase 0x%p, irq %d\n",
1566 hw->hw_membase, hw->irq);
1567 #else
1568 printk(KERN_INFO
1569 "HFC-4S/8S: found PCI card at iobase 0x%x, irq %d\n",
1570 hw->iobase, hw->irq);
1571 #endif
1572
1573 hfc_hardware_enable(hw, 1, 0);
1574
1575 return (0);
1576
1577 out:
1578 hw->irq = 0;
1579 release_pci_ports(hw);
1580 kfree(hw);
1581 return (err);
1582 }
1583
1584 /*****************************************/
1585 /* PCI hotplug interface: probe new card */
1586 /*****************************************/
1587 static int __devinit
1588 hfc4s8s_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1589 {
1590 int err = -ENOMEM;
1591 hfc4s8s_param *driver_data = (hfc4s8s_param *) ent->driver_data;
1592 hfc4s8s_hw *hw;
1593
1594 if (!(hw = kzalloc(sizeof(hfc4s8s_hw), GFP_ATOMIC))) {
1595 printk(KERN_ERR "No kmem for HFC-4S/8S card\n");
1596 return (err);
1597 }
1598
1599 hw->pdev = pdev;
1600 err = pci_enable_device(pdev);
1601
1602 if (err)
1603 goto out;
1604
1605 hw->cardnum = card_cnt;
1606 sprintf(hw->card_name, "hfc4s8s_%d", hw->cardnum);
1607 printk(KERN_INFO "HFC-4S/8S: found adapter %s (%s) at %s\n",
1608 driver_data->device_name, hw->card_name, pci_name(pdev));
1609
1610 spin_lock_init(&hw->lock);
1611
1612 hw->driver_data = *driver_data;
1613 hw->irq = pdev->irq;
1614 hw->iobase = pci_resource_start(pdev, 0);
1615
1616 #ifdef HISAX_HFC4S8S_PCIMEM
1617 hw->hw_membase = (u_char *) pci_resource_start(pdev, 1);
1618 hw->membase = ioremap((ulong) hw->hw_membase, 256);
1619 #else
1620 if (!request_region(hw->iobase, 8, hw->card_name)) {
1621 printk(KERN_INFO
1622 "HFC-4S/8S: failed to rquest address space at 0x%04x\n",
1623 hw->iobase);
1624 goto out;
1625 }
1626 #endif
1627
1628 pci_set_drvdata(pdev, hw);
1629 err = setup_instance(hw);
1630 if (!err)
1631 card_cnt++;
1632 return (err);
1633
1634 out:
1635 kfree(hw);
1636 return (err);
1637 }
1638
1639 /**************************************/
1640 /* PCI hotplug interface: remove card */
1641 /**************************************/
1642 static void __devexit
1643 hfc4s8s_remove(struct pci_dev *pdev)
1644 {
1645 hfc4s8s_hw *hw = pci_get_drvdata(pdev);
1646
1647 printk(KERN_INFO "HFC-4S/8S: removing card %d\n", hw->cardnum);
1648 hfc_hardware_enable(hw, 0, 0);
1649
1650 if (hw->irq)
1651 free_irq(hw->irq, hw);
1652 hw->irq = 0;
1653 release_pci_ports(hw);
1654
1655 card_cnt--;
1656 pci_disable_device(pdev);
1657 kfree(hw);
1658 return;
1659 }
1660
1661 static struct pci_driver hfc4s8s_driver = {
1662 .name = "hfc4s8s_l1",
1663 .probe = hfc4s8s_probe,
1664 .remove = __devexit_p(hfc4s8s_remove),
1665 .id_table = hfc4s8s_ids,
1666 };
1667
1668 /**********************/
1669 /* driver Module init */
1670 /**********************/
1671 static int __init
1672 hfc4s8s_module_init(void)
1673 {
1674 int err;
1675
1676 printk(KERN_INFO
1677 "HFC-4S/8S: Layer 1 driver module for HFC-4S/8S isdn chips, %s\n",
1678 hfc4s8s_rev);
1679 printk(KERN_INFO
1680 "HFC-4S/8S: (C) 2003 Cornelius Consult, www.cornelius-consult.de\n");
1681
1682 card_cnt = 0;
1683
1684 err = pci_register_driver(&hfc4s8s_driver);
1685 if (err < 0) {
1686 goto out;
1687 }
1688 printk(KERN_INFO "HFC-4S/8S: found %d cards\n", card_cnt);
1689
1690 #if !defined(CONFIG_HOTPLUG)
1691 if (err == 0) {
1692 err = -ENODEV;
1693 pci_unregister_driver(&hfc4s8s_driver);
1694 goto out;
1695 }
1696 #endif
1697
1698 return 0;
1699 out:
1700 return (err);
1701 } /* hfc4s8s_init_hw */
1702
1703 /*************************************/
1704 /* driver module exit : */
1705 /* release the HFC-4s/8s hardware */
1706 /*************************************/
1707 static void __exit
1708 hfc4s8s_module_exit(void)
1709 {
1710 pci_unregister_driver(&hfc4s8s_driver);
1711 printk(KERN_INFO "HFC-4S/8S: module removed\n");
1712 } /* hfc4s8s_release_hw */
1713
1714 module_init(hfc4s8s_module_init);
1715 module_exit(hfc4s8s_module_exit);
Support for the Chinese Samsung S3C2440 based development boards