30b7e990ed0b19a4419b9cb51e967055830c3cba
[linux-2.6.git] / drivers / atm / idt77252.c
1 /******************************************************************* 
2  * ident "$Id: idt77252.c,v 1.2 2001/11/11 08:13:54 ecd Exp $"
3  *
4  * $Author: ecd $
5  * $Date: 2001/11/11 08:13:54 $
6  *
7  * Copyright (c) 2000 ATecoM GmbH 
8  *
9  * The author may be reached at ecd@atecom.com.
10  *
11  * This program is free software; you can redistribute  it and/or modify it
12  * under  the terms of  the GNU General  Public License as published by the
13  * Free Software Foundation;  either version 2 of the  License, or (at your
14  * option) any later version.
15  *
16  * THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR   IMPLIED
17  * WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
19  * NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT,  INDIRECT,
20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21  * NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
22  * USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
23  * ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26  *
27  * You should have received a copy of the  GNU General Public License along
28  * with this program; if not, write  to the Free Software Foundation, Inc.,
29  * 675 Mass Ave, Cambridge, MA 02139, USA.
30  *
31  *******************************************************************/
32 static char const rcsid[] =
33 "$Id: idt77252.c,v 1.2 2001/11/11 08:13:54 ecd Exp $";
34
35
36 #include <linux/module.h>
37 #include <linux/config.h>
38 #include <linux/pci.h>
39 #include <linux/skbuff.h>
40 #include <linux/kernel.h>
41 #include <linux/vmalloc.h>
42 #include <linux/netdevice.h>
43 #include <linux/atmdev.h>
44 #include <linux/atm.h>
45 #include <linux/delay.h>
46 #include <linux/init.h>
47 #include <linux/bitops.h>
48 #include <linux/wait.h>
49 #include <linux/jiffies.h>
50 #include <asm/semaphore.h>
51 #include <asm/io.h>
52 #include <asm/uaccess.h>
53 #include <asm/atomic.h>
54 #include <asm/byteorder.h>
55
56 #ifdef CONFIG_ATM_IDT77252_USE_SUNI
57 #include "suni.h"
58 #endif /* CONFIG_ATM_IDT77252_USE_SUNI */
59
60
61 #include "idt77252.h"
62 #include "idt77252_tables.h"
63
64 static unsigned int vpibits = 1;
65
66
67 #define CONFIG_ATM_IDT77252_SEND_IDLE 1
68
69
70 /*
71  * Debug HACKs.
72  */
73 #define DEBUG_MODULE 1
74 #undef HAVE_EEPROM      /* does not work, yet. */
75
76 #ifdef CONFIG_ATM_IDT77252_DEBUG
77 static unsigned long debug = DBG_GENERAL;
78 #endif
79
80
81 #define SAR_RX_DELAY    (SAR_CFG_RXINT_NODELAY)
82
83
84 /*
85  * SCQ Handling.
86  */
87 static struct scq_info *alloc_scq(struct idt77252_dev *, int);
88 static void free_scq(struct idt77252_dev *, struct scq_info *);
89 static int queue_skb(struct idt77252_dev *, struct vc_map *,
90                      struct sk_buff *, int oam);
91 static void drain_scq(struct idt77252_dev *, struct vc_map *);
92 static unsigned long get_free_scd(struct idt77252_dev *, struct vc_map *);
93 static void fill_scd(struct idt77252_dev *, struct scq_info *, int);
94
95 /*
96  * FBQ Handling.
97  */
98 static int push_rx_skb(struct idt77252_dev *,
99                        struct sk_buff *, int queue);
100 static void recycle_rx_skb(struct idt77252_dev *, struct sk_buff *);
101 static void flush_rx_pool(struct idt77252_dev *, struct rx_pool *);
102 static void recycle_rx_pool_skb(struct idt77252_dev *,
103                                 struct rx_pool *);
104 static void add_rx_skb(struct idt77252_dev *, int queue,
105                        unsigned int size, unsigned int count);
106
107 /*
108  * RSQ Handling.
109  */
110 static int init_rsq(struct idt77252_dev *);
111 static void deinit_rsq(struct idt77252_dev *);
112 static void idt77252_rx(struct idt77252_dev *);
113
114 /*
115  * TSQ handling.
116  */
117 static int init_tsq(struct idt77252_dev *);
118 static void deinit_tsq(struct idt77252_dev *);
119 static void idt77252_tx(struct idt77252_dev *);
120
121
122 /*
123  * ATM Interface.
124  */
125 static void idt77252_dev_close(struct atm_dev *dev);
126 static int idt77252_open(struct atm_vcc *vcc);
127 static void idt77252_close(struct atm_vcc *vcc);
128 static int idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb);
129 static int idt77252_send_oam(struct atm_vcc *vcc, void *cell,
130                              int flags);
131 static void idt77252_phy_put(struct atm_dev *dev, unsigned char value,
132                              unsigned long addr);
133 static unsigned char idt77252_phy_get(struct atm_dev *dev, unsigned long addr);
134 static int idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos,
135                                int flags);
136 static int idt77252_proc_read(struct atm_dev *dev, loff_t * pos,
137                               char *page);
138 static void idt77252_softint(void *dev_id);
139
140
141 static struct atmdev_ops idt77252_ops =
142 {
143         .dev_close      = idt77252_dev_close,
144         .open           = idt77252_open,
145         .close          = idt77252_close,
146         .send           = idt77252_send,
147         .send_oam       = idt77252_send_oam,
148         .phy_put        = idt77252_phy_put,
149         .phy_get        = idt77252_phy_get,
150         .change_qos     = idt77252_change_qos,
151         .proc_read      = idt77252_proc_read,
152         .owner          = THIS_MODULE
153 };
154
155 static struct idt77252_dev *idt77252_chain = NULL;
156 static unsigned int idt77252_sram_write_errors = 0;
157
158 /*****************************************************************************/
159 /*                                                                           */
160 /* I/O and Utility Bus                                                       */
161 /*                                                                           */
162 /*****************************************************************************/
163
164 static void
165 waitfor_idle(struct idt77252_dev *card)
166 {
167         u32 stat;
168
169         stat = readl(SAR_REG_STAT);
170         while (stat & SAR_STAT_CMDBZ)
171                 stat = readl(SAR_REG_STAT);
172 }
173
174 static u32
175 read_sram(struct idt77252_dev *card, unsigned long addr)
176 {
177         unsigned long flags;
178         u32 value;
179
180         spin_lock_irqsave(&card->cmd_lock, flags);
181         writel(SAR_CMD_READ_SRAM | (addr << 2), SAR_REG_CMD);
182         waitfor_idle(card);
183         value = readl(SAR_REG_DR0);
184         spin_unlock_irqrestore(&card->cmd_lock, flags);
185         return value;
186 }
187
188 static void
189 write_sram(struct idt77252_dev *card, unsigned long addr, u32 value)
190 {
191         unsigned long flags;
192
193         if ((idt77252_sram_write_errors == 0) &&
194             (((addr > card->tst[0] + card->tst_size - 2) &&
195               (addr < card->tst[0] + card->tst_size)) ||
196              ((addr > card->tst[1] + card->tst_size - 2) &&
197               (addr < card->tst[1] + card->tst_size)))) {
198                 printk("%s: ERROR: TST JMP section at %08lx written: %08x\n",
199                        card->name, addr, value);
200         }
201
202         spin_lock_irqsave(&card->cmd_lock, flags);
203         writel(value, SAR_REG_DR0);
204         writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD);
205         waitfor_idle(card);
206         spin_unlock_irqrestore(&card->cmd_lock, flags);
207 }
208
209 static u8
210 read_utility(void *dev, unsigned long ubus_addr)
211 {
212         struct idt77252_dev *card = dev;
213         unsigned long flags;
214         u8 value;
215
216         if (!card) {
217                 printk("Error: No such device.\n");
218                 return -1;
219         }
220
221         spin_lock_irqsave(&card->cmd_lock, flags);
222         writel(SAR_CMD_READ_UTILITY + ubus_addr, SAR_REG_CMD);
223         waitfor_idle(card);
224         value = readl(SAR_REG_DR0);
225         spin_unlock_irqrestore(&card->cmd_lock, flags);
226         return value;
227 }
228
229 static void
230 write_utility(void *dev, unsigned long ubus_addr, u8 value)
231 {
232         struct idt77252_dev *card = dev;
233         unsigned long flags;
234
235         if (!card) {
236                 printk("Error: No such device.\n");
237                 return;
238         }
239
240         spin_lock_irqsave(&card->cmd_lock, flags);
241         writel((u32) value, SAR_REG_DR0);
242         writel(SAR_CMD_WRITE_UTILITY + ubus_addr, SAR_REG_CMD);
243         waitfor_idle(card);
244         spin_unlock_irqrestore(&card->cmd_lock, flags);
245 }
246
247 #ifdef HAVE_EEPROM
248 static u32 rdsrtab[] =
249 {
250         SAR_GP_EECS | SAR_GP_EESCLK,
251         0,
252         SAR_GP_EESCLK,                  /* 0 */
253         0,
254         SAR_GP_EESCLK,                  /* 0 */
255         0,
256         SAR_GP_EESCLK,                  /* 0 */
257         0,
258         SAR_GP_EESCLK,                  /* 0 */
259         0,
260         SAR_GP_EESCLK,                  /* 0 */
261         SAR_GP_EEDO,
262         SAR_GP_EESCLK | SAR_GP_EEDO,    /* 1 */
263         0,
264         SAR_GP_EESCLK,                  /* 0 */
265         SAR_GP_EEDO,
266         SAR_GP_EESCLK | SAR_GP_EEDO     /* 1 */
267 };
268
269 static u32 wrentab[] =
270 {
271         SAR_GP_EECS | SAR_GP_EESCLK,
272         0,
273         SAR_GP_EESCLK,                  /* 0 */
274         0,
275         SAR_GP_EESCLK,                  /* 0 */
276         0,
277         SAR_GP_EESCLK,                  /* 0 */
278         0,
279         SAR_GP_EESCLK,                  /* 0 */
280         SAR_GP_EEDO,
281         SAR_GP_EESCLK | SAR_GP_EEDO,    /* 1 */
282         SAR_GP_EEDO,
283         SAR_GP_EESCLK | SAR_GP_EEDO,    /* 1 */
284         0,
285         SAR_GP_EESCLK,                  /* 0 */
286         0,
287         SAR_GP_EESCLK                   /* 0 */
288 };
289
290 static u32 rdtab[] =
291 {
292         SAR_GP_EECS | SAR_GP_EESCLK,
293         0,
294         SAR_GP_EESCLK,                  /* 0 */
295         0,
296         SAR_GP_EESCLK,                  /* 0 */
297         0,
298         SAR_GP_EESCLK,                  /* 0 */
299         0,
300         SAR_GP_EESCLK,                  /* 0 */
301         0,
302         SAR_GP_EESCLK,                  /* 0 */
303         0,
304         SAR_GP_EESCLK,                  /* 0 */
305         SAR_GP_EEDO,
306         SAR_GP_EESCLK | SAR_GP_EEDO,    /* 1 */
307         SAR_GP_EEDO,
308         SAR_GP_EESCLK | SAR_GP_EEDO     /* 1 */
309 };
310
311 static u32 wrtab[] =
312 {
313         SAR_GP_EECS | SAR_GP_EESCLK,
314         0,
315         SAR_GP_EESCLK,                  /* 0 */
316         0,
317         SAR_GP_EESCLK,                  /* 0 */
318         0,
319         SAR_GP_EESCLK,                  /* 0 */
320         0,
321         SAR_GP_EESCLK,                  /* 0 */
322         0,
323         SAR_GP_EESCLK,                  /* 0 */
324         0,
325         SAR_GP_EESCLK,                  /* 0 */
326         SAR_GP_EEDO,
327         SAR_GP_EESCLK | SAR_GP_EEDO,    /* 1 */
328         0,
329         SAR_GP_EESCLK                   /* 0 */
330 };
331
332 static u32 clktab[] =
333 {
334         0,
335         SAR_GP_EESCLK,
336         0,
337         SAR_GP_EESCLK,
338         0,
339         SAR_GP_EESCLK,
340         0,
341         SAR_GP_EESCLK,
342         0,
343         SAR_GP_EESCLK,
344         0,
345         SAR_GP_EESCLK,
346         0,
347         SAR_GP_EESCLK,
348         0,
349         SAR_GP_EESCLK,
350         0
351 };
352
353 static u32
354 idt77252_read_gp(struct idt77252_dev *card)
355 {
356         u32 gp;
357
358         gp = readl(SAR_REG_GP);
359 #if 0
360         printk("RD: %s\n", gp & SAR_GP_EEDI ? "1" : "0");
361 #endif
362         return gp;
363 }
364
365 static void
366 idt77252_write_gp(struct idt77252_dev *card, u32 value)
367 {
368         unsigned long flags;
369
370 #if 0
371         printk("WR: %s %s %s\n", value & SAR_GP_EECS ? "   " : "/CS",
372                value & SAR_GP_EESCLK ? "HIGH" : "LOW ",
373                value & SAR_GP_EEDO   ? "1" : "0");
374 #endif
375
376         spin_lock_irqsave(&card->cmd_lock, flags);
377         waitfor_idle(card);
378         writel(value, SAR_REG_GP);
379         spin_unlock_irqrestore(&card->cmd_lock, flags);
380 }
381
382 static u8
383 idt77252_eeprom_read_status(struct idt77252_dev *card)
384 {
385         u8 byte;
386         u32 gp;
387         int i, j;
388
389         gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
390
391         for (i = 0; i < sizeof(rdsrtab)/sizeof(rdsrtab[0]); i++) {
392                 idt77252_write_gp(card, gp | rdsrtab[i]);
393                 udelay(5);
394         }
395         idt77252_write_gp(card, gp | SAR_GP_EECS);
396         udelay(5);
397
398         byte = 0;
399         for (i = 0, j = 0; i < 8; i++) {
400                 byte <<= 1;
401
402                 idt77252_write_gp(card, gp | clktab[j++]);
403                 udelay(5);
404
405                 byte |= idt77252_read_gp(card) & SAR_GP_EEDI ? 1 : 0;
406
407                 idt77252_write_gp(card, gp | clktab[j++]);
408                 udelay(5);
409         }
410         idt77252_write_gp(card, gp | SAR_GP_EECS);
411         udelay(5);
412
413         return byte;
414 }
415
416 static u8
417 idt77252_eeprom_read_byte(struct idt77252_dev *card, u8 offset)
418 {
419         u8 byte;
420         u32 gp;
421         int i, j;
422
423         gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
424
425         for (i = 0; i < sizeof(rdtab)/sizeof(rdtab[0]); i++) {
426                 idt77252_write_gp(card, gp | rdtab[i]);
427                 udelay(5);
428         }
429         idt77252_write_gp(card, gp | SAR_GP_EECS);
430         udelay(5);
431
432         for (i = 0, j = 0; i < 8; i++) {
433                 idt77252_write_gp(card, gp | clktab[j++] |
434                                         (offset & 1 ? SAR_GP_EEDO : 0));
435                 udelay(5);
436
437                 idt77252_write_gp(card, gp | clktab[j++] |
438                                         (offset & 1 ? SAR_GP_EEDO : 0));
439                 udelay(5);
440
441                 offset >>= 1;
442         }
443         idt77252_write_gp(card, gp | SAR_GP_EECS);
444         udelay(5);
445
446         byte = 0;
447         for (i = 0, j = 0; i < 8; i++) {
448                 byte <<= 1;
449
450                 idt77252_write_gp(card, gp | clktab[j++]);
451                 udelay(5);
452
453                 byte |= idt77252_read_gp(card) & SAR_GP_EEDI ? 1 : 0;
454
455                 idt77252_write_gp(card, gp | clktab[j++]);
456                 udelay(5);
457         }
458         idt77252_write_gp(card, gp | SAR_GP_EECS);
459         udelay(5);
460
461         return byte;
462 }
463
464 static void
465 idt77252_eeprom_write_byte(struct idt77252_dev *card, u8 offset, u8 data)
466 {
467         u32 gp;
468         int i, j;
469
470         gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
471
472         for (i = 0; i < sizeof(wrentab)/sizeof(wrentab[0]); i++) {
473                 idt77252_write_gp(card, gp | wrentab[i]);
474                 udelay(5);
475         }
476         idt77252_write_gp(card, gp | SAR_GP_EECS);
477         udelay(5);
478
479         for (i = 0; i < sizeof(wrtab)/sizeof(wrtab[0]); i++) {
480                 idt77252_write_gp(card, gp | wrtab[i]);
481                 udelay(5);
482         }
483         idt77252_write_gp(card, gp | SAR_GP_EECS);
484         udelay(5);
485
486         for (i = 0, j = 0; i < 8; i++) {
487                 idt77252_write_gp(card, gp | clktab[j++] |
488                                         (offset & 1 ? SAR_GP_EEDO : 0));
489                 udelay(5);
490
491                 idt77252_write_gp(card, gp | clktab[j++] |
492                                         (offset & 1 ? SAR_GP_EEDO : 0));
493                 udelay(5);
494
495                 offset >>= 1;
496         }
497         idt77252_write_gp(card, gp | SAR_GP_EECS);
498         udelay(5);
499
500         for (i = 0, j = 0; i < 8; i++) {
501                 idt77252_write_gp(card, gp | clktab[j++] |
502                                         (data & 1 ? SAR_GP_EEDO : 0));
503                 udelay(5);
504
505                 idt77252_write_gp(card, gp | clktab[j++] |
506                                         (data & 1 ? SAR_GP_EEDO : 0));
507                 udelay(5);
508
509                 data >>= 1;
510         }
511         idt77252_write_gp(card, gp | SAR_GP_EECS);
512         udelay(5);
513 }
514
515 static void
516 idt77252_eeprom_init(struct idt77252_dev *card)
517 {
518         u32 gp;
519
520         gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
521
522         idt77252_write_gp(card, gp | SAR_GP_EECS | SAR_GP_EESCLK);
523         udelay(5);
524         idt77252_write_gp(card, gp | SAR_GP_EECS);
525         udelay(5);
526         idt77252_write_gp(card, gp | SAR_GP_EECS | SAR_GP_EESCLK);
527         udelay(5);
528         idt77252_write_gp(card, gp | SAR_GP_EECS);
529         udelay(5);
530 }
531 #endif /* HAVE_EEPROM */
532
533
534 #ifdef CONFIG_ATM_IDT77252_DEBUG
535 static void
536 dump_tct(struct idt77252_dev *card, int index)
537 {
538         unsigned long tct;
539         int i;
540
541         tct = (unsigned long) (card->tct_base + index * SAR_SRAM_TCT_SIZE);
542
543         printk("%s: TCT %x:", card->name, index);
544         for (i = 0; i < 8; i++) {
545                 printk(" %08x", read_sram(card, tct + i));
546         }
547         printk("\n");
548 }
549
550 static void
551 idt77252_tx_dump(struct idt77252_dev *card)
552 {
553         struct atm_vcc *vcc;
554         struct vc_map *vc;
555         int i;
556
557         printk("%s\n", __FUNCTION__);
558         for (i = 0; i < card->tct_size; i++) {
559                 vc = card->vcs[i];
560                 if (!vc)
561                         continue;
562
563                 vcc = NULL;
564                 if (vc->rx_vcc)
565                         vcc = vc->rx_vcc;
566                 else if (vc->tx_vcc)
567                         vcc = vc->tx_vcc;
568
569                 if (!vcc)
570                         continue;
571
572                 printk("%s: Connection %d:\n", card->name, vc->index);
573                 dump_tct(card, vc->index);
574         }
575 }
576 #endif
577
578
579 /*****************************************************************************/
580 /*                                                                           */
581 /* SCQ Handling                                                              */
582 /*                                                                           */
583 /*****************************************************************************/
584
585 static int
586 sb_pool_add(struct idt77252_dev *card, struct sk_buff *skb, int queue)
587 {
588         struct sb_pool *pool = &card->sbpool[queue];
589         int index;
590
591         index = pool->index;
592         while (pool->skb[index]) {
593                 index = (index + 1) & FBQ_MASK;
594                 if (index == pool->index)
595                         return -ENOBUFS;
596         }
597
598         pool->skb[index] = skb;
599         IDT77252_PRV_POOL(skb) = POOL_HANDLE(queue, index);
600
601         pool->index = (index + 1) & FBQ_MASK;
602         return 0;
603 }
604
605 static void
606 sb_pool_remove(struct idt77252_dev *card, struct sk_buff *skb)
607 {
608         unsigned int queue, index;
609         u32 handle;
610
611         handle = IDT77252_PRV_POOL(skb);
612
613         queue = POOL_QUEUE(handle);
614         if (queue > 3)
615                 return;
616
617         index = POOL_INDEX(handle);
618         if (index > FBQ_SIZE - 1)
619                 return;
620
621         card->sbpool[queue].skb[index] = NULL;
622 }
623
624 static struct sk_buff *
625 sb_pool_skb(struct idt77252_dev *card, u32 handle)
626 {
627         unsigned int queue, index;
628
629         queue = POOL_QUEUE(handle);
630         if (queue > 3)
631                 return NULL;
632
633         index = POOL_INDEX(handle);
634         if (index > FBQ_SIZE - 1)
635                 return NULL;
636
637         return card->sbpool[queue].skb[index];
638 }
639
640 static struct scq_info *
641 alloc_scq(struct idt77252_dev *card, int class)
642 {
643         struct scq_info *scq;
644
645         scq = (struct scq_info *) kmalloc(sizeof(struct scq_info), GFP_KERNEL);
646         if (!scq)
647                 return NULL;
648         memset(scq, 0, sizeof(struct scq_info));
649
650         scq->base = pci_alloc_consistent(card->pcidev, SCQ_SIZE,
651                                          &scq->paddr);
652         if (scq->base == NULL) {
653                 kfree(scq);
654                 return NULL;
655         }
656         memset(scq->base, 0, SCQ_SIZE);
657
658         scq->next = scq->base;
659         scq->last = scq->base + (SCQ_ENTRIES - 1);
660         atomic_set(&scq->used, 0);
661
662         spin_lock_init(&scq->lock);
663         spin_lock_init(&scq->skblock);
664
665         skb_queue_head_init(&scq->transmit);
666         skb_queue_head_init(&scq->pending);
667
668         TXPRINTK("idt77252: SCQ: base 0x%p, next 0x%p, last 0x%p, paddr %08llx\n",
669                  scq->base, scq->next, scq->last, (unsigned long long)scq->paddr);
670
671         return scq;
672 }
673
674 static void
675 free_scq(struct idt77252_dev *card, struct scq_info *scq)
676 {
677         struct sk_buff *skb;
678         struct atm_vcc *vcc;
679
680         pci_free_consistent(card->pcidev, SCQ_SIZE,
681                             scq->base, scq->paddr);
682
683         while ((skb = skb_dequeue(&scq->transmit))) {
684                 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
685                                  skb->len, PCI_DMA_TODEVICE);
686
687                 vcc = ATM_SKB(skb)->vcc;
688                 if (vcc->pop)
689                         vcc->pop(vcc, skb);
690                 else
691                         dev_kfree_skb(skb);
692         }
693
694         while ((skb = skb_dequeue(&scq->pending))) {
695                 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
696                                  skb->len, PCI_DMA_TODEVICE);
697
698                 vcc = ATM_SKB(skb)->vcc;
699                 if (vcc->pop)
700                         vcc->pop(vcc, skb);
701                 else
702                         dev_kfree_skb(skb);
703         }
704
705         kfree(scq);
706 }
707
708
709 static int
710 push_on_scq(struct idt77252_dev *card, struct vc_map *vc, struct sk_buff *skb)
711 {
712         struct scq_info *scq = vc->scq;
713         unsigned long flags;
714         struct scqe *tbd;
715         int entries;
716
717         TXPRINTK("%s: SCQ: next 0x%p\n", card->name, scq->next);
718
719         atomic_inc(&scq->used);
720         entries = atomic_read(&scq->used);
721         if (entries > (SCQ_ENTRIES - 1)) {
722                 atomic_dec(&scq->used);
723                 goto out;
724         }
725
726         skb_queue_tail(&scq->transmit, skb);
727
728         spin_lock_irqsave(&vc->lock, flags);
729         if (vc->estimator) {
730                 struct atm_vcc *vcc = vc->tx_vcc;
731                 struct sock *sk = sk_atm(vcc);
732
733                 vc->estimator->cells += (skb->len + 47) / 48;
734                 if (atomic_read(&sk->sk_wmem_alloc) >
735                     (sk->sk_sndbuf >> 1)) {
736                         u32 cps = vc->estimator->maxcps;
737
738                         vc->estimator->cps = cps;
739                         vc->estimator->avcps = cps << 5;
740                         if (vc->lacr < vc->init_er) {
741                                 vc->lacr = vc->init_er;
742                                 writel(TCMDQ_LACR | (vc->lacr << 16) |
743                                        vc->index, SAR_REG_TCMDQ);
744                         }
745                 }
746         }
747         spin_unlock_irqrestore(&vc->lock, flags);
748
749         tbd = &IDT77252_PRV_TBD(skb);
750
751         spin_lock_irqsave(&scq->lock, flags);
752         scq->next->word_1 = cpu_to_le32(tbd->word_1 |
753                                         SAR_TBD_TSIF | SAR_TBD_GTSI);
754         scq->next->word_2 = cpu_to_le32(tbd->word_2);
755         scq->next->word_3 = cpu_to_le32(tbd->word_3);
756         scq->next->word_4 = cpu_to_le32(tbd->word_4);
757
758         if (scq->next == scq->last)
759                 scq->next = scq->base;
760         else
761                 scq->next++;
762
763         write_sram(card, scq->scd,
764                    scq->paddr +
765                    (u32)((unsigned long)scq->next - (unsigned long)scq->base));
766         spin_unlock_irqrestore(&scq->lock, flags);
767
768         scq->trans_start = jiffies;
769
770         if (test_and_clear_bit(VCF_IDLE, &vc->flags)) {
771                 writel(TCMDQ_START_LACR | (vc->lacr << 16) | vc->index,
772                        SAR_REG_TCMDQ);
773         }
774
775         TXPRINTK("%d entries in SCQ used (push).\n", atomic_read(&scq->used));
776
777         XPRINTK("%s: SCQ (after push %2d) head = 0x%x, next = 0x%p.\n",
778                 card->name, atomic_read(&scq->used),
779                 read_sram(card, scq->scd + 1), scq->next);
780
781         return 0;
782
783 out:
784         if (time_after(jiffies, scq->trans_start + HZ)) {
785                 printk("%s: Error pushing TBD for %d.%d\n",
786                        card->name, vc->tx_vcc->vpi, vc->tx_vcc->vci);
787 #ifdef CONFIG_ATM_IDT77252_DEBUG
788                 idt77252_tx_dump(card);
789 #endif
790                 scq->trans_start = jiffies;
791         }
792
793         return -ENOBUFS;
794 }
795
796
797 static void
798 drain_scq(struct idt77252_dev *card, struct vc_map *vc)
799 {
800         struct scq_info *scq = vc->scq;
801         struct sk_buff *skb;
802         struct atm_vcc *vcc;
803
804         TXPRINTK("%s: SCQ (before drain %2d) next = 0x%p.\n",
805                  card->name, atomic_read(&scq->used), scq->next);
806
807         skb = skb_dequeue(&scq->transmit);
808         if (skb) {
809                 TXPRINTK("%s: freeing skb at %p.\n", card->name, skb);
810
811                 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
812                                  skb->len, PCI_DMA_TODEVICE);
813
814                 vcc = ATM_SKB(skb)->vcc;
815
816                 if (vcc->pop)
817                         vcc->pop(vcc, skb);
818                 else
819                         dev_kfree_skb(skb);
820
821                 atomic_inc(&vcc->stats->tx);
822         }
823
824         atomic_dec(&scq->used);
825
826         spin_lock(&scq->skblock);
827         while ((skb = skb_dequeue(&scq->pending))) {
828                 if (push_on_scq(card, vc, skb)) {
829                         skb_queue_head(&vc->scq->pending, skb);
830                         break;
831                 }
832         }
833         spin_unlock(&scq->skblock);
834 }
835
836 static int
837 queue_skb(struct idt77252_dev *card, struct vc_map *vc,
838           struct sk_buff *skb, int oam)
839 {
840         struct atm_vcc *vcc;
841         struct scqe *tbd;
842         unsigned long flags;
843         int error;
844         int aal;
845
846         if (skb->len == 0) {
847                 printk("%s: invalid skb->len (%d)\n", card->name, skb->len);
848                 return -EINVAL;
849         }
850
851         TXPRINTK("%s: Sending %d bytes of data.\n",
852                  card->name, skb->len);
853
854         tbd = &IDT77252_PRV_TBD(skb);
855         vcc = ATM_SKB(skb)->vcc;
856
857         IDT77252_PRV_PADDR(skb) = pci_map_single(card->pcidev, skb->data,
858                                                  skb->len, PCI_DMA_TODEVICE);
859
860         error = -EINVAL;
861
862         if (oam) {
863                 if (skb->len != 52)
864                         goto errout;
865
866                 tbd->word_1 = SAR_TBD_OAM | ATM_CELL_PAYLOAD | SAR_TBD_EPDU;
867                 tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4;
868                 tbd->word_3 = 0x00000000;
869                 tbd->word_4 = (skb->data[0] << 24) | (skb->data[1] << 16) |
870                               (skb->data[2] <<  8) | (skb->data[3] <<  0);
871
872                 if (test_bit(VCF_RSV, &vc->flags))
873                         vc = card->vcs[0];
874
875                 goto done;
876         }
877
878         if (test_bit(VCF_RSV, &vc->flags)) {
879                 printk("%s: Trying to transmit on reserved VC\n", card->name);
880                 goto errout;
881         }
882
883         aal = vcc->qos.aal;
884
885         switch (aal) {
886         case ATM_AAL0:
887         case ATM_AAL34:
888                 if (skb->len > 52)
889                         goto errout;
890
891                 if (aal == ATM_AAL0)
892                         tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL0 |
893                                       ATM_CELL_PAYLOAD;
894                 else
895                         tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL34 |
896                                       ATM_CELL_PAYLOAD;
897
898                 tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4;
899                 tbd->word_3 = 0x00000000;
900                 tbd->word_4 = (skb->data[0] << 24) | (skb->data[1] << 16) |
901                               (skb->data[2] <<  8) | (skb->data[3] <<  0);
902                 break;
903
904         case ATM_AAL5:
905                 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL5 | skb->len;
906                 tbd->word_2 = IDT77252_PRV_PADDR(skb);
907                 tbd->word_3 = skb->len;
908                 tbd->word_4 = (vcc->vpi << SAR_TBD_VPI_SHIFT) |
909                               (vcc->vci << SAR_TBD_VCI_SHIFT);
910                 break;
911
912         case ATM_AAL1:
913         case ATM_AAL2:
914         default:
915                 printk("%s: Traffic type not supported.\n", card->name);
916                 error = -EPROTONOSUPPORT;
917                 goto errout;
918         }
919
920 done:
921         spin_lock_irqsave(&vc->scq->skblock, flags);
922         skb_queue_tail(&vc->scq->pending, skb);
923
924         while ((skb = skb_dequeue(&vc->scq->pending))) {
925                 if (push_on_scq(card, vc, skb)) {
926                         skb_queue_head(&vc->scq->pending, skb);
927                         break;
928                 }
929         }
930         spin_unlock_irqrestore(&vc->scq->skblock, flags);
931
932         return 0;
933
934 errout:
935         pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
936                          skb->len, PCI_DMA_TODEVICE);
937         return error;
938 }
939
940 static unsigned long
941 get_free_scd(struct idt77252_dev *card, struct vc_map *vc)
942 {
943         int i;
944
945         for (i = 0; i < card->scd_size; i++) {
946                 if (!card->scd2vc[i]) {
947                         card->scd2vc[i] = vc;
948                         vc->scd_index = i;
949                         return card->scd_base + i * SAR_SRAM_SCD_SIZE;
950                 }
951         }
952         return 0;
953 }
954
955 static void
956 fill_scd(struct idt77252_dev *card, struct scq_info *scq, int class)
957 {
958         write_sram(card, scq->scd, scq->paddr);
959         write_sram(card, scq->scd + 1, 0x00000000);
960         write_sram(card, scq->scd + 2, 0xffffffff);
961         write_sram(card, scq->scd + 3, 0x00000000);
962 }
963
964 static void
965 clear_scd(struct idt77252_dev *card, struct scq_info *scq, int class)
966 {
967         return;
968 }
969
970 /*****************************************************************************/
971 /*                                                                           */
972 /* RSQ Handling                                                              */
973 /*                                                                           */
974 /*****************************************************************************/
975
976 static int
977 init_rsq(struct idt77252_dev *card)
978 {
979         struct rsq_entry *rsqe;
980
981         card->rsq.base = pci_alloc_consistent(card->pcidev, RSQSIZE,
982                                               &card->rsq.paddr);
983         if (card->rsq.base == NULL) {
984                 printk("%s: can't allocate RSQ.\n", card->name);
985                 return -1;
986         }
987         memset(card->rsq.base, 0, RSQSIZE);
988
989         card->rsq.last = card->rsq.base + RSQ_NUM_ENTRIES - 1;
990         card->rsq.next = card->rsq.last;
991         for (rsqe = card->rsq.base; rsqe <= card->rsq.last; rsqe++)
992                 rsqe->word_4 = 0;
993
994         writel((unsigned long) card->rsq.last - (unsigned long) card->rsq.base,
995                SAR_REG_RSQH);
996         writel(card->rsq.paddr, SAR_REG_RSQB);
997
998         IPRINTK("%s: RSQ base at 0x%lx (0x%x).\n", card->name,
999                 (unsigned long) card->rsq.base,
1000                 readl(SAR_REG_RSQB));
1001         IPRINTK("%s: RSQ head = 0x%x, base = 0x%x, tail = 0x%x.\n",
1002                 card->name,
1003                 readl(SAR_REG_RSQH),
1004                 readl(SAR_REG_RSQB),
1005                 readl(SAR_REG_RSQT));
1006
1007         return 0;
1008 }
1009
1010 static void
1011 deinit_rsq(struct idt77252_dev *card)
1012 {
1013         pci_free_consistent(card->pcidev, RSQSIZE,
1014                             card->rsq.base, card->rsq.paddr);
1015 }
1016
1017 static void
1018 dequeue_rx(struct idt77252_dev *card, struct rsq_entry *rsqe)
1019 {
1020         struct atm_vcc *vcc;
1021         struct sk_buff *skb;
1022         struct rx_pool *rpp;
1023         struct vc_map *vc;
1024         u32 header, vpi, vci;
1025         u32 stat;
1026         int i;
1027
1028         stat = le32_to_cpu(rsqe->word_4);
1029
1030         if (stat & SAR_RSQE_IDLE) {
1031                 RXPRINTK("%s: message about inactive connection.\n",
1032                          card->name);
1033                 return;
1034         }
1035
1036         skb = sb_pool_skb(card, le32_to_cpu(rsqe->word_2));
1037         if (skb == NULL) {
1038                 printk("%s: NULL skb in %s, rsqe: %08x %08x %08x %08x\n",
1039                        card->name, __FUNCTION__,
1040                        le32_to_cpu(rsqe->word_1), le32_to_cpu(rsqe->word_2),
1041                        le32_to_cpu(rsqe->word_3), le32_to_cpu(rsqe->word_4));
1042                 return;
1043         }
1044
1045         header = le32_to_cpu(rsqe->word_1);
1046         vpi = (header >> 16) & 0x00ff;
1047         vci = (header >>  0) & 0xffff;
1048
1049         RXPRINTK("%s: SDU for %d.%d received in buffer 0x%p (data 0x%p).\n",
1050                  card->name, vpi, vci, skb, skb->data);
1051
1052         if ((vpi >= (1 << card->vpibits)) || (vci != (vci & card->vcimask))) {
1053                 printk("%s: SDU received for out-of-range vc %u.%u\n",
1054                        card->name, vpi, vci);
1055                 recycle_rx_skb(card, skb);
1056                 return;
1057         }
1058
1059         vc = card->vcs[VPCI2VC(card, vpi, vci)];
1060         if (!vc || !test_bit(VCF_RX, &vc->flags)) {
1061                 printk("%s: SDU received on non RX vc %u.%u\n",
1062                        card->name, vpi, vci);
1063                 recycle_rx_skb(card, skb);
1064                 return;
1065         }
1066
1067         vcc = vc->rx_vcc;
1068
1069         pci_dma_sync_single_for_cpu(card->pcidev, IDT77252_PRV_PADDR(skb),
1070                                     skb->end - skb->data, PCI_DMA_FROMDEVICE);
1071
1072         if ((vcc->qos.aal == ATM_AAL0) ||
1073             (vcc->qos.aal == ATM_AAL34)) {
1074                 struct sk_buff *sb;
1075                 unsigned char *cell;
1076                 u32 aal0;
1077
1078                 cell = skb->data;
1079                 for (i = (stat & SAR_RSQE_CELLCNT); i; i--) {
1080                         if ((sb = dev_alloc_skb(64)) == NULL) {
1081                                 printk("%s: Can't allocate buffers for aal0.\n",
1082                                        card->name);
1083                                 atomic_add(i, &vcc->stats->rx_drop);
1084                                 break;
1085                         }
1086                         if (!atm_charge(vcc, sb->truesize)) {
1087                                 RXPRINTK("%s: atm_charge() dropped aal0 packets.\n",
1088                                          card->name);
1089                                 atomic_add(i - 1, &vcc->stats->rx_drop);
1090                                 dev_kfree_skb(sb);
1091                                 break;
1092                         }
1093                         aal0 = (vpi << ATM_HDR_VPI_SHIFT) |
1094                                (vci << ATM_HDR_VCI_SHIFT);
1095                         aal0 |= (stat & SAR_RSQE_EPDU) ? 0x00000002 : 0;
1096                         aal0 |= (stat & SAR_RSQE_CLP)  ? 0x00000001 : 0;
1097
1098                         *((u32 *) sb->data) = aal0;
1099                         skb_put(sb, sizeof(u32));
1100                         memcpy(skb_put(sb, ATM_CELL_PAYLOAD),
1101                                cell, ATM_CELL_PAYLOAD);
1102
1103                         ATM_SKB(sb)->vcc = vcc;
1104                         do_gettimeofday(&sb->stamp);
1105                         vcc->push(vcc, sb);
1106                         atomic_inc(&vcc->stats->rx);
1107
1108                         cell += ATM_CELL_PAYLOAD;
1109                 }
1110
1111                 recycle_rx_skb(card, skb);
1112                 return;
1113         }
1114         if (vcc->qos.aal != ATM_AAL5) {
1115                 printk("%s: Unexpected AAL type in dequeue_rx(): %d.\n",
1116                        card->name, vcc->qos.aal);
1117                 recycle_rx_skb(card, skb);
1118                 return;
1119         }
1120         skb->len = (stat & SAR_RSQE_CELLCNT) * ATM_CELL_PAYLOAD;
1121
1122         rpp = &vc->rcv.rx_pool;
1123
1124         rpp->len += skb->len;
1125         if (!rpp->count++)
1126                 rpp->first = skb;
1127         *rpp->last = skb;
1128         rpp->last = &skb->next;
1129
1130         if (stat & SAR_RSQE_EPDU) {
1131                 unsigned char *l1l2;
1132                 unsigned int len;
1133
1134                 l1l2 = (unsigned char *) ((unsigned long) skb->data + skb->len - 6);
1135
1136                 len = (l1l2[0] << 8) | l1l2[1];
1137                 len = len ? len : 0x10000;
1138
1139                 RXPRINTK("%s: PDU has %d bytes.\n", card->name, len);
1140
1141                 if ((len + 8 > rpp->len) || (len + (47 + 8) < rpp->len)) {
1142                         RXPRINTK("%s: AAL5 PDU size mismatch: %d != %d. "
1143                                  "(CDC: %08x)\n",
1144                                  card->name, len, rpp->len, readl(SAR_REG_CDC));
1145                         recycle_rx_pool_skb(card, rpp);
1146                         atomic_inc(&vcc->stats->rx_err);
1147                         return;
1148                 }
1149                 if (stat & SAR_RSQE_CRC) {
1150                         RXPRINTK("%s: AAL5 CRC error.\n", card->name);
1151                         recycle_rx_pool_skb(card, rpp);
1152                         atomic_inc(&vcc->stats->rx_err);
1153                         return;
1154                 }
1155                 if (rpp->count > 1) {
1156                         struct sk_buff *sb;
1157
1158                         skb = dev_alloc_skb(rpp->len);
1159                         if (!skb) {
1160                                 RXPRINTK("%s: Can't alloc RX skb.\n",
1161                                          card->name);
1162                                 recycle_rx_pool_skb(card, rpp);
1163                                 atomic_inc(&vcc->stats->rx_err);
1164                                 return;
1165                         }
1166                         if (!atm_charge(vcc, skb->truesize)) {
1167                                 recycle_rx_pool_skb(card, rpp);
1168                                 dev_kfree_skb(skb);
1169                                 return;
1170                         }
1171                         sb = rpp->first;
1172                         for (i = 0; i < rpp->count; i++) {
1173                                 memcpy(skb_put(skb, sb->len),
1174                                        sb->data, sb->len);
1175                                 sb = sb->next;
1176                         }
1177
1178                         recycle_rx_pool_skb(card, rpp);
1179
1180                         skb_trim(skb, len);
1181                         ATM_SKB(skb)->vcc = vcc;
1182                         do_gettimeofday(&skb->stamp);
1183
1184                         vcc->push(vcc, skb);
1185                         atomic_inc(&vcc->stats->rx);
1186
1187                         return;
1188                 }
1189
1190                 skb->next = NULL;
1191                 flush_rx_pool(card, rpp);
1192
1193                 if (!atm_charge(vcc, skb->truesize)) {
1194                         recycle_rx_skb(card, skb);
1195                         return;
1196                 }
1197
1198                 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
1199                                  skb->end - skb->data, PCI_DMA_FROMDEVICE);
1200                 sb_pool_remove(card, skb);
1201
1202                 skb_trim(skb, len);
1203                 ATM_SKB(skb)->vcc = vcc;
1204                 do_gettimeofday(&skb->stamp);
1205
1206                 vcc->push(vcc, skb);
1207                 atomic_inc(&vcc->stats->rx);
1208
1209                 if (skb->truesize > SAR_FB_SIZE_3)
1210                         add_rx_skb(card, 3, SAR_FB_SIZE_3, 1);
1211                 else if (skb->truesize > SAR_FB_SIZE_2)
1212                         add_rx_skb(card, 2, SAR_FB_SIZE_2, 1);
1213                 else if (skb->truesize > SAR_FB_SIZE_1)
1214                         add_rx_skb(card, 1, SAR_FB_SIZE_1, 1);
1215                 else
1216                         add_rx_skb(card, 0, SAR_FB_SIZE_0, 1);
1217                 return;
1218         }
1219 }
1220
1221 static void
1222 idt77252_rx(struct idt77252_dev *card)
1223 {
1224         struct rsq_entry *rsqe;
1225
1226         if (card->rsq.next == card->rsq.last)
1227                 rsqe = card->rsq.base;
1228         else
1229                 rsqe = card->rsq.next + 1;
1230
1231         if (!(le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID)) {
1232                 RXPRINTK("%s: no entry in RSQ.\n", card->name);
1233                 return;
1234         }
1235
1236         do {
1237                 dequeue_rx(card, rsqe);
1238                 rsqe->word_4 = 0;
1239                 card->rsq.next = rsqe;
1240                 if (card->rsq.next == card->rsq.last)
1241                         rsqe = card->rsq.base;
1242                 else
1243                         rsqe = card->rsq.next + 1;
1244         } while (le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID);
1245
1246         writel((unsigned long) card->rsq.next - (unsigned long) card->rsq.base,
1247                SAR_REG_RSQH);
1248 }
1249
1250 static void
1251 idt77252_rx_raw(struct idt77252_dev *card)
1252 {
1253         struct sk_buff  *queue;
1254         u32             head, tail;
1255         struct atm_vcc  *vcc;
1256         struct vc_map   *vc;
1257         struct sk_buff  *sb;
1258
1259         if (card->raw_cell_head == NULL) {
1260                 u32 handle = le32_to_cpu(*(card->raw_cell_hnd + 1));
1261                 card->raw_cell_head = sb_pool_skb(card, handle);
1262         }
1263
1264         queue = card->raw_cell_head;
1265         if (!queue)
1266                 return;
1267
1268         head = IDT77252_PRV_PADDR(queue) + (queue->data - queue->head - 16);
1269         tail = readl(SAR_REG_RAWCT);
1270
1271         pci_dma_sync_single_for_cpu(card->pcidev, IDT77252_PRV_PADDR(queue),
1272                                     queue->end - queue->head - 16,
1273                                     PCI_DMA_FROMDEVICE);
1274
1275         while (head != tail) {
1276                 unsigned int vpi, vci, pti;
1277                 u32 header;
1278
1279                 header = le32_to_cpu(*(u32 *) &queue->data[0]);
1280
1281                 vpi = (header & ATM_HDR_VPI_MASK) >> ATM_HDR_VPI_SHIFT;
1282                 vci = (header & ATM_HDR_VCI_MASK) >> ATM_HDR_VCI_SHIFT;
1283                 pti = (header & ATM_HDR_PTI_MASK) >> ATM_HDR_PTI_SHIFT;
1284
1285 #ifdef CONFIG_ATM_IDT77252_DEBUG
1286                 if (debug & DBG_RAW_CELL) {
1287                         int i;
1288
1289                         printk("%s: raw cell %x.%02x.%04x.%x.%x\n",
1290                                card->name, (header >> 28) & 0x000f,
1291                                (header >> 20) & 0x00ff,
1292                                (header >>  4) & 0xffff,
1293                                (header >>  1) & 0x0007,
1294                                (header >>  0) & 0x0001);
1295                         for (i = 16; i < 64; i++)
1296                                 printk(" %02x", queue->data[i]);
1297                         printk("\n");
1298                 }
1299 #endif
1300
1301                 if (vpi >= (1<<card->vpibits) || vci >= (1<<card->vcibits)) {
1302                         RPRINTK("%s: SDU received for out-of-range vc %u.%u\n",
1303                                 card->name, vpi, vci);
1304                         goto drop;
1305                 }
1306
1307                 vc = card->vcs[VPCI2VC(card, vpi, vci)];
1308                 if (!vc || !test_bit(VCF_RX, &vc->flags)) {
1309                         RPRINTK("%s: SDU received on non RX vc %u.%u\n",
1310                                 card->name, vpi, vci);
1311                         goto drop;
1312                 }
1313
1314                 vcc = vc->rx_vcc;
1315
1316                 if (vcc->qos.aal != ATM_AAL0) {
1317                         RPRINTK("%s: raw cell for non AAL0 vc %u.%u\n",
1318                                 card->name, vpi, vci);
1319                         atomic_inc(&vcc->stats->rx_drop);
1320                         goto drop;
1321                 }
1322         
1323                 if ((sb = dev_alloc_skb(64)) == NULL) {
1324                         printk("%s: Can't allocate buffers for AAL0.\n",
1325                                card->name);
1326                         atomic_inc(&vcc->stats->rx_err);
1327                         goto drop;
1328                 }
1329
1330                 if (!atm_charge(vcc, sb->truesize)) {
1331                         RXPRINTK("%s: atm_charge() dropped AAL0 packets.\n",
1332                                  card->name);
1333                         dev_kfree_skb(sb);
1334                         goto drop;
1335                 }
1336
1337                 *((u32 *) sb->data) = header;
1338                 skb_put(sb, sizeof(u32));
1339                 memcpy(skb_put(sb, ATM_CELL_PAYLOAD), &(queue->data[16]),
1340                        ATM_CELL_PAYLOAD);
1341
1342                 ATM_SKB(sb)->vcc = vcc;
1343                 do_gettimeofday(&sb->stamp);
1344                 vcc->push(vcc, sb);
1345                 atomic_inc(&vcc->stats->rx);
1346
1347 drop:
1348                 skb_pull(queue, 64);
1349
1350                 head = IDT77252_PRV_PADDR(queue)
1351                                         + (queue->data - queue->head - 16);
1352
1353                 if (queue->len < 128) {
1354                         struct sk_buff *next;
1355                         u32 handle;
1356
1357                         head = le32_to_cpu(*(u32 *) &queue->data[0]);
1358                         handle = le32_to_cpu(*(u32 *) &queue->data[4]);
1359
1360                         next = sb_pool_skb(card, handle);
1361                         recycle_rx_skb(card, queue);
1362
1363                         if (next) {
1364                                 card->raw_cell_head = next;
1365                                 queue = card->raw_cell_head;
1366                                 pci_dma_sync_single_for_cpu(card->pcidev,
1367                                                             IDT77252_PRV_PADDR(queue),
1368                                                             queue->end - queue->data,
1369                                                             PCI_DMA_FROMDEVICE);
1370                         } else {
1371                                 card->raw_cell_head = NULL;
1372                                 printk("%s: raw cell queue overrun\n",
1373                                        card->name);
1374                                 break;
1375                         }
1376                 }
1377         }
1378 }
1379
1380
1381 /*****************************************************************************/
1382 /*                                                                           */
1383 /* TSQ Handling                                                              */
1384 /*                                                                           */
1385 /*****************************************************************************/
1386
1387 static int
1388 init_tsq(struct idt77252_dev *card)
1389 {
1390         struct tsq_entry *tsqe;
1391
1392         card->tsq.base = pci_alloc_consistent(card->pcidev, RSQSIZE,
1393                                               &card->tsq.paddr);
1394         if (card->tsq.base == NULL) {
1395                 printk("%s: can't allocate TSQ.\n", card->name);
1396                 return -1;
1397         }
1398         memset(card->tsq.base, 0, TSQSIZE);
1399
1400         card->tsq.last = card->tsq.base + TSQ_NUM_ENTRIES - 1;
1401         card->tsq.next = card->tsq.last;
1402         for (tsqe = card->tsq.base; tsqe <= card->tsq.last; tsqe++)
1403                 tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID);
1404
1405         writel(card->tsq.paddr, SAR_REG_TSQB);
1406         writel((unsigned long) card->tsq.next - (unsigned long) card->tsq.base,
1407                SAR_REG_TSQH);
1408
1409         return 0;
1410 }
1411
1412 static void
1413 deinit_tsq(struct idt77252_dev *card)
1414 {
1415         pci_free_consistent(card->pcidev, TSQSIZE,
1416                             card->tsq.base, card->tsq.paddr);
1417 }
1418
1419 static void
1420 idt77252_tx(struct idt77252_dev *card)
1421 {
1422         struct tsq_entry *tsqe;
1423         unsigned int vpi, vci;
1424         struct vc_map *vc;
1425         u32 conn, stat;
1426
1427         if (card->tsq.next == card->tsq.last)
1428                 tsqe = card->tsq.base;
1429         else
1430                 tsqe = card->tsq.next + 1;
1431
1432         TXPRINTK("idt77252_tx: tsq  %p: base %p, next %p, last %p\n", tsqe,
1433                  card->tsq.base, card->tsq.next, card->tsq.last);
1434         TXPRINTK("idt77252_tx: tsqb %08x, tsqt %08x, tsqh %08x, \n",
1435                  readl(SAR_REG_TSQB),
1436                  readl(SAR_REG_TSQT),
1437                  readl(SAR_REG_TSQH));
1438
1439         stat = le32_to_cpu(tsqe->word_2);
1440
1441         if (stat & SAR_TSQE_INVALID)
1442                 return;
1443
1444         do {
1445                 TXPRINTK("tsqe: 0x%p [0x%08x 0x%08x]\n", tsqe,
1446                          le32_to_cpu(tsqe->word_1),
1447                          le32_to_cpu(tsqe->word_2));
1448
1449                 switch (stat & SAR_TSQE_TYPE) {
1450                 case SAR_TSQE_TYPE_TIMER:
1451                         TXPRINTK("%s: Timer RollOver detected.\n", card->name);
1452                         break;
1453
1454                 case SAR_TSQE_TYPE_IDLE:
1455
1456                         conn = le32_to_cpu(tsqe->word_1);
1457
1458                         if (SAR_TSQE_TAG(stat) == 0x10) {
1459 #ifdef  NOTDEF
1460                                 printk("%s: Connection %d halted.\n",
1461                                        card->name,
1462                                        le32_to_cpu(tsqe->word_1) & 0x1fff);
1463 #endif
1464                                 break;
1465                         }
1466
1467                         vc = card->vcs[conn & 0x1fff];
1468                         if (!vc) {
1469                                 printk("%s: could not find VC from conn %d\n",
1470                                        card->name, conn & 0x1fff);
1471                                 break;
1472                         }
1473
1474                         printk("%s: Connection %d IDLE.\n",
1475                                card->name, vc->index);
1476
1477                         set_bit(VCF_IDLE, &vc->flags);
1478                         break;
1479
1480                 case SAR_TSQE_TYPE_TSR:
1481
1482                         conn = le32_to_cpu(tsqe->word_1);
1483
1484                         vc = card->vcs[conn & 0x1fff];
1485                         if (!vc) {
1486                                 printk("%s: no VC at index %d\n",
1487                                        card->name,
1488                                        le32_to_cpu(tsqe->word_1) & 0x1fff);
1489                                 break;
1490                         }
1491
1492                         drain_scq(card, vc);
1493                         break;
1494
1495                 case SAR_TSQE_TYPE_TBD_COMP:
1496
1497                         conn = le32_to_cpu(tsqe->word_1);
1498
1499                         vpi = (conn >> SAR_TBD_VPI_SHIFT) & 0x00ff;
1500                         vci = (conn >> SAR_TBD_VCI_SHIFT) & 0xffff;
1501
1502                         if (vpi >= (1 << card->vpibits) ||
1503                             vci >= (1 << card->vcibits)) {
1504                                 printk("%s: TBD complete: "
1505                                        "out of range VPI.VCI %u.%u\n",
1506                                        card->name, vpi, vci);
1507                                 break;
1508                         }
1509
1510                         vc = card->vcs[VPCI2VC(card, vpi, vci)];
1511                         if (!vc) {
1512                                 printk("%s: TBD complete: "
1513                                        "no VC at VPI.VCI %u.%u\n",
1514                                        card->name, vpi, vci);
1515                                 break;
1516                         }
1517
1518                         drain_scq(card, vc);
1519                         break;
1520                 }
1521
1522                 tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID);
1523
1524                 card->tsq.next = tsqe;
1525                 if (card->tsq.next == card->tsq.last)
1526                         tsqe = card->tsq.base;
1527                 else
1528                         tsqe = card->tsq.next + 1;
1529
1530                 TXPRINTK("tsqe: %p: base %p, next %p, last %p\n", tsqe,
1531                          card->tsq.base, card->tsq.next, card->tsq.last);
1532
1533                 stat = le32_to_cpu(tsqe->word_2);
1534
1535         } while (!(stat & SAR_TSQE_INVALID));
1536
1537         writel((unsigned long)card->tsq.next - (unsigned long)card->tsq.base,
1538                SAR_REG_TSQH);
1539
1540         XPRINTK("idt77252_tx-after writel%d: TSQ head = 0x%x, tail = 0x%x, next = 0x%p.\n",
1541                 card->index, readl(SAR_REG_TSQH),
1542                 readl(SAR_REG_TSQT), card->tsq.next);
1543 }
1544
1545
1546 static void
1547 tst_timer(unsigned long data)
1548 {
1549         struct idt77252_dev *card = (struct idt77252_dev *)data;
1550         unsigned long base, idle, jump;
1551         unsigned long flags;
1552         u32 pc;
1553         int e;
1554
1555         spin_lock_irqsave(&card->tst_lock, flags);
1556
1557         base = card->tst[card->tst_index];
1558         idle = card->tst[card->tst_index ^ 1];
1559
1560         if (test_bit(TST_SWITCH_WAIT, &card->tst_state)) {
1561                 jump = base + card->tst_size - 2;
1562
1563                 pc = readl(SAR_REG_NOW) >> 2;
1564                 if ((pc ^ idle) & ~(card->tst_size - 1)) {
1565                         mod_timer(&card->tst_timer, jiffies + 1);
1566                         goto out;
1567                 }
1568
1569                 clear_bit(TST_SWITCH_WAIT, &card->tst_state);
1570
1571                 card->tst_index ^= 1;
1572                 write_sram(card, jump, TSTE_OPC_JMP | (base << 2));
1573
1574                 base = card->tst[card->tst_index];
1575                 idle = card->tst[card->tst_index ^ 1];
1576
1577                 for (e = 0; e < card->tst_size - 2; e++) {
1578                         if (card->soft_tst[e].tste & TSTE_PUSH_IDLE) {
1579                                 write_sram(card, idle + e,
1580                                            card->soft_tst[e].tste & TSTE_MASK);
1581                                 card->soft_tst[e].tste &= ~(TSTE_PUSH_IDLE);
1582                         }
1583                 }
1584         }
1585
1586         if (test_and_clear_bit(TST_SWITCH_PENDING, &card->tst_state)) {
1587
1588                 for (e = 0; e < card->tst_size - 2; e++) {
1589                         if (card->soft_tst[e].tste & TSTE_PUSH_ACTIVE) {
1590                                 write_sram(card, idle + e,
1591                                            card->soft_tst[e].tste & TSTE_MASK);
1592                                 card->soft_tst[e].tste &= ~(TSTE_PUSH_ACTIVE);
1593                                 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1594                         }
1595                 }
1596
1597                 jump = base + card->tst_size - 2;
1598
1599                 write_sram(card, jump, TSTE_OPC_NULL);
1600                 set_bit(TST_SWITCH_WAIT, &card->tst_state);
1601
1602                 mod_timer(&card->tst_timer, jiffies + 1);
1603         }
1604
1605 out:
1606         spin_unlock_irqrestore(&card->tst_lock, flags);
1607 }
1608
1609 static int
1610 __fill_tst(struct idt77252_dev *card, struct vc_map *vc,
1611            int n, unsigned int opc)
1612 {
1613         unsigned long cl, avail;
1614         unsigned long idle;
1615         int e, r;
1616         u32 data;
1617
1618         avail = card->tst_size - 2;
1619         for (e = 0; e < avail; e++) {
1620                 if (card->soft_tst[e].vc == NULL)
1621                         break;
1622         }
1623         if (e >= avail) {
1624                 printk("%s: No free TST entries found\n", card->name);
1625                 return -1;
1626         }
1627
1628         NPRINTK("%s: conn %d: first TST entry at %d.\n",
1629                 card->name, vc ? vc->index : -1, e);
1630
1631         r = n;
1632         cl = avail;
1633         data = opc & TSTE_OPC_MASK;
1634         if (vc && (opc != TSTE_OPC_NULL))
1635                 data = opc | vc->index;
1636
1637         idle = card->tst[card->tst_index ^ 1];
1638
1639         /*
1640          * Fill Soft TST.
1641          */
1642         while (r > 0) {
1643                 if ((cl >= avail) && (card->soft_tst[e].vc == NULL)) {
1644                         if (vc)
1645                                 card->soft_tst[e].vc = vc;
1646                         else
1647                                 card->soft_tst[e].vc = (void *)-1;
1648
1649                         card->soft_tst[e].tste = data;
1650                         if (timer_pending(&card->tst_timer))
1651                                 card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE;
1652                         else {
1653                                 write_sram(card, idle + e, data);
1654                                 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1655                         }
1656
1657                         cl -= card->tst_size;
1658                         r--;
1659                 }
1660
1661                 if (++e == avail)
1662                         e = 0;
1663                 cl += n;
1664         }
1665
1666         return 0;
1667 }
1668
1669 static int
1670 fill_tst(struct idt77252_dev *card, struct vc_map *vc, int n, unsigned int opc)
1671 {
1672         unsigned long flags;
1673         int res;
1674
1675         spin_lock_irqsave(&card->tst_lock, flags);
1676
1677         res = __fill_tst(card, vc, n, opc);
1678
1679         set_bit(TST_SWITCH_PENDING, &card->tst_state);
1680         if (!timer_pending(&card->tst_timer))
1681                 mod_timer(&card->tst_timer, jiffies + 1);
1682
1683         spin_unlock_irqrestore(&card->tst_lock, flags);
1684         return res;
1685 }
1686
1687 static int
1688 __clear_tst(struct idt77252_dev *card, struct vc_map *vc)
1689 {
1690         unsigned long idle;
1691         int e;
1692
1693         idle = card->tst[card->tst_index ^ 1];
1694
1695         for (e = 0; e < card->tst_size - 2; e++) {
1696                 if (card->soft_tst[e].vc == vc) {
1697                         card->soft_tst[e].vc = NULL;
1698
1699                         card->soft_tst[e].tste = TSTE_OPC_VAR;
1700                         if (timer_pending(&card->tst_timer))
1701                                 card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE;
1702                         else {
1703                                 write_sram(card, idle + e, TSTE_OPC_VAR);
1704                                 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1705                         }
1706                 }
1707         }
1708
1709         return 0;
1710 }
1711
1712 static int
1713 clear_tst(struct idt77252_dev *card, struct vc_map *vc)
1714 {
1715         unsigned long flags;
1716         int res;
1717
1718         spin_lock_irqsave(&card->tst_lock, flags);
1719
1720         res = __clear_tst(card, vc);
1721
1722         set_bit(TST_SWITCH_PENDING, &card->tst_state);
1723         if (!timer_pending(&card->tst_timer))
1724                 mod_timer(&card->tst_timer, jiffies + 1);
1725
1726         spin_unlock_irqrestore(&card->tst_lock, flags);
1727         return res;
1728 }
1729
1730 static int
1731 change_tst(struct idt77252_dev *card, struct vc_map *vc,
1732            int n, unsigned int opc)
1733 {
1734         unsigned long flags;
1735         int res;
1736
1737         spin_lock_irqsave(&card->tst_lock, flags);
1738
1739         __clear_tst(card, vc);
1740         res = __fill_tst(card, vc, n, opc);
1741
1742         set_bit(TST_SWITCH_PENDING, &card->tst_state);
1743         if (!timer_pending(&card->tst_timer))
1744                 mod_timer(&card->tst_timer, jiffies + 1);
1745
1746         spin_unlock_irqrestore(&card->tst_lock, flags);
1747         return res;
1748 }
1749
1750
1751 static int
1752 set_tct(struct idt77252_dev *card, struct vc_map *vc)
1753 {
1754         unsigned long tct;
1755
1756         tct = (unsigned long) (card->tct_base + vc->index * SAR_SRAM_TCT_SIZE);
1757
1758         switch (vc->class) {
1759         case SCHED_CBR:
1760                 OPRINTK("%s: writing TCT at 0x%lx, SCD 0x%lx.\n",
1761                         card->name, tct, vc->scq->scd);
1762
1763                 write_sram(card, tct + 0, TCT_CBR | vc->scq->scd);
1764                 write_sram(card, tct + 1, 0);
1765                 write_sram(card, tct + 2, 0);
1766                 write_sram(card, tct + 3, 0);
1767                 write_sram(card, tct + 4, 0);
1768                 write_sram(card, tct + 5, 0);
1769                 write_sram(card, tct + 6, 0);
1770                 write_sram(card, tct + 7, 0);
1771                 break;
1772
1773         case SCHED_UBR:
1774                 OPRINTK("%s: writing TCT at 0x%lx, SCD 0x%lx.\n",
1775                         card->name, tct, vc->scq->scd);
1776
1777                 write_sram(card, tct + 0, TCT_UBR | vc->scq->scd);
1778                 write_sram(card, tct + 1, 0);
1779                 write_sram(card, tct + 2, TCT_TSIF);
1780                 write_sram(card, tct + 3, TCT_HALT | TCT_IDLE);
1781                 write_sram(card, tct + 4, 0);
1782                 write_sram(card, tct + 5, vc->init_er);
1783                 write_sram(card, tct + 6, 0);
1784                 write_sram(card, tct + 7, TCT_FLAG_UBR);
1785                 break;
1786
1787         case SCHED_VBR:
1788         case SCHED_ABR:
1789         default:
1790                 return -ENOSYS;
1791         }
1792
1793         return 0;
1794 }
1795
1796 /*****************************************************************************/
1797 /*                                                                           */
1798 /* FBQ Handling                                                              */
1799 /*                                                                           */
1800 /*****************************************************************************/
1801
1802 static __inline__ int
1803 idt77252_fbq_level(struct idt77252_dev *card, int queue)
1804 {
1805         return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) & 0x0f;
1806 }
1807
1808 static __inline__ int
1809 idt77252_fbq_full(struct idt77252_dev *card, int queue)
1810 {
1811         return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) == 0x0f;
1812 }
1813
1814 static int
1815 push_rx_skb(struct idt77252_dev *card, struct sk_buff *skb, int queue)
1816 {
1817         unsigned long flags;
1818         u32 handle;
1819         u32 addr;
1820
1821         skb->data = skb->tail = skb->head;
1822         skb->len = 0;
1823
1824         skb_reserve(skb, 16);
1825
1826         switch (queue) {
1827         case 0:
1828                 skb_put(skb, SAR_FB_SIZE_0);
1829                 break;
1830         case 1:
1831                 skb_put(skb, SAR_FB_SIZE_1);
1832                 break;
1833         case 2:
1834                 skb_put(skb, SAR_FB_SIZE_2);
1835                 break;
1836         case 3:
1837                 skb_put(skb, SAR_FB_SIZE_3);
1838                 break;
1839         default:
1840                 dev_kfree_skb(skb);
1841                 return -1;
1842         }
1843
1844         if (idt77252_fbq_full(card, queue))
1845                 return -1;
1846
1847         memset(&skb->data[(skb->len & ~(0x3f)) - 64], 0, 2 * sizeof(u32));
1848
1849         handle = IDT77252_PRV_POOL(skb);
1850         addr = IDT77252_PRV_PADDR(skb);
1851
1852         spin_lock_irqsave(&card->cmd_lock, flags);
1853         writel(handle, card->fbq[queue]);
1854         writel(addr, card->fbq[queue]);
1855         spin_unlock_irqrestore(&card->cmd_lock, flags);
1856
1857         return 0;
1858 }
1859
1860 static void
1861 add_rx_skb(struct idt77252_dev *card, int queue,
1862            unsigned int size, unsigned int count)
1863 {
1864         struct sk_buff *skb;
1865         dma_addr_t paddr;
1866         u32 handle;
1867
1868         while (count--) {
1869                 skb = dev_alloc_skb(size);
1870                 if (!skb)
1871                         return;
1872
1873                 if (sb_pool_add(card, skb, queue)) {
1874                         printk("%s: SB POOL full\n", __FUNCTION__);
1875                         goto outfree;
1876                 }
1877
1878                 paddr = pci_map_single(card->pcidev, skb->data,
1879                                        skb->end - skb->data,
1880                                        PCI_DMA_FROMDEVICE);
1881                 IDT77252_PRV_PADDR(skb) = paddr;
1882
1883                 if (push_rx_skb(card, skb, queue)) {
1884                         printk("%s: FB QUEUE full\n", __FUNCTION__);
1885                         goto outunmap;
1886                 }
1887         }
1888
1889         return;
1890
1891 outunmap:
1892         pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
1893                          skb->end - skb->data, PCI_DMA_FROMDEVICE);
1894
1895         handle = IDT77252_PRV_POOL(skb);
1896         card->sbpool[POOL_QUEUE(handle)].skb[POOL_INDEX(handle)] = NULL;
1897
1898 outfree:
1899         dev_kfree_skb(skb);
1900 }
1901
1902
1903 static void
1904 recycle_rx_skb(struct idt77252_dev *card, struct sk_buff *skb)
1905 {
1906         u32 handle = IDT77252_PRV_POOL(skb);
1907         int err;
1908
1909         pci_dma_sync_single_for_device(card->pcidev, IDT77252_PRV_PADDR(skb),
1910                                        skb->end - skb->data, PCI_DMA_FROMDEVICE);
1911
1912         err = push_rx_skb(card, skb, POOL_QUEUE(handle));
1913         if (err) {
1914                 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
1915                                  skb->end - skb->data, PCI_DMA_FROMDEVICE);
1916                 sb_pool_remove(card, skb);
1917                 dev_kfree_skb(skb);
1918         }
1919 }
1920
1921 static void
1922 flush_rx_pool(struct idt77252_dev *card, struct rx_pool *rpp)
1923 {
1924         rpp->len = 0;
1925         rpp->count = 0;
1926         rpp->first = NULL;
1927         rpp->last = &rpp->first;
1928 }
1929
1930 static void
1931 recycle_rx_pool_skb(struct idt77252_dev *card, struct rx_pool *rpp)
1932 {
1933         struct sk_buff *skb, *next;
1934         int i;
1935
1936         skb = rpp->first;
1937         for (i = 0; i < rpp->count; i++) {
1938                 next = skb->next;
1939                 skb->next = NULL;
1940                 recycle_rx_skb(card, skb);
1941                 skb = next;
1942         }
1943         flush_rx_pool(card, rpp);
1944 }
1945
1946 /*****************************************************************************/
1947 /*                                                                           */
1948 /* ATM Interface                                                             */
1949 /*                                                                           */
1950 /*****************************************************************************/
1951
1952 static void
1953 idt77252_phy_put(struct atm_dev *dev, unsigned char value, unsigned long addr)
1954 {
1955         write_utility(dev->dev_data, 0x100 + (addr & 0x1ff), value);
1956 }
1957
1958 static unsigned char
1959 idt77252_phy_get(struct atm_dev *dev, unsigned long addr)
1960 {
1961         return read_utility(dev->dev_data, 0x100 + (addr & 0x1ff));
1962 }
1963
1964 static inline int
1965 idt77252_send_skb(struct atm_vcc *vcc, struct sk_buff *skb, int oam)
1966 {
1967         struct atm_dev *dev = vcc->dev;
1968         struct idt77252_dev *card = dev->dev_data;
1969         struct vc_map *vc = vcc->dev_data;
1970         int err;
1971
1972         if (vc == NULL) {
1973                 printk("%s: NULL connection in send().\n", card->name);
1974                 atomic_inc(&vcc->stats->tx_err);
1975                 dev_kfree_skb(skb);
1976                 return -EINVAL;
1977         }
1978         if (!test_bit(VCF_TX, &vc->flags)) {
1979                 printk("%s: Trying to transmit on a non-tx VC.\n", card->name);
1980                 atomic_inc(&vcc->stats->tx_err);
1981                 dev_kfree_skb(skb);
1982                 return -EINVAL;
1983         }
1984
1985         switch (vcc->qos.aal) {
1986         case ATM_AAL0:
1987         case ATM_AAL1:
1988         case ATM_AAL5:
1989                 break;
1990         default:
1991                 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal);
1992                 atomic_inc(&vcc->stats->tx_err);
1993                 dev_kfree_skb(skb);
1994                 return -EINVAL;
1995         }
1996
1997         if (skb_shinfo(skb)->nr_frags != 0) {
1998                 printk("%s: No scatter-gather yet.\n", card->name);
1999                 atomic_inc(&vcc->stats->tx_err);
2000                 dev_kfree_skb(skb);
2001                 return -EINVAL;
2002         }
2003         ATM_SKB(skb)->vcc = vcc;
2004
2005         err = queue_skb(card, vc, skb, oam);
2006         if (err) {
2007                 atomic_inc(&vcc->stats->tx_err);
2008                 dev_kfree_skb(skb);
2009                 return err;
2010         }
2011
2012         return 0;
2013 }
2014
2015 int
2016 idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb)
2017 {
2018         return idt77252_send_skb(vcc, skb, 0);
2019 }
2020
2021 static int
2022 idt77252_send_oam(struct atm_vcc *vcc, void *cell, int flags)
2023 {
2024         struct atm_dev *dev = vcc->dev;
2025         struct idt77252_dev *card = dev->dev_data;
2026         struct sk_buff *skb;
2027
2028         skb = dev_alloc_skb(64);
2029         if (!skb) {
2030                 printk("%s: Out of memory in send_oam().\n", card->name);
2031                 atomic_inc(&vcc->stats->tx_err);
2032                 return -ENOMEM;
2033         }
2034         atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
2035
2036         memcpy(skb_put(skb, 52), cell, 52);
2037
2038         return idt77252_send_skb(vcc, skb, 1);
2039 }
2040
2041 static __inline__ unsigned int
2042 idt77252_fls(unsigned int x)
2043 {
2044         int r = 1;
2045
2046         if (x == 0)
2047                 return 0;
2048         if (x & 0xffff0000) {
2049                 x >>= 16;
2050                 r += 16;
2051         }
2052         if (x & 0xff00) {
2053                 x >>= 8;
2054                 r += 8;
2055         }
2056         if (x & 0xf0) {
2057                 x >>= 4;
2058                 r += 4;
2059         }
2060         if (x & 0xc) {
2061                 x >>= 2;
2062                 r += 2;
2063         }
2064         if (x & 0x2)
2065                 r += 1;
2066         return r;
2067 }
2068
2069 static u16
2070 idt77252_int_to_atmfp(unsigned int rate)
2071 {
2072         u16 m, e;
2073
2074         if (rate == 0)
2075                 return 0;
2076         e = idt77252_fls(rate) - 1;
2077         if (e < 9)
2078                 m = (rate - (1 << e)) << (9 - e);
2079         else if (e == 9)
2080                 m = (rate - (1 << e));
2081         else /* e > 9 */
2082                 m = (rate - (1 << e)) >> (e - 9);
2083         return 0x4000 | (e << 9) | m;
2084 }
2085
2086 static u8
2087 idt77252_rate_logindex(struct idt77252_dev *card, int pcr)
2088 {
2089         u16 afp;
2090
2091         afp = idt77252_int_to_atmfp(pcr < 0 ? -pcr : pcr);
2092         if (pcr < 0)
2093                 return rate_to_log[(afp >> 5) & 0x1ff];
2094         return rate_to_log[((afp >> 5) + 1) & 0x1ff];
2095 }
2096
2097 static void
2098 idt77252_est_timer(unsigned long data)
2099 {
2100         struct vc_map *vc = (struct vc_map *)data;
2101         struct idt77252_dev *card = vc->card;
2102         struct rate_estimator *est;
2103         unsigned long flags;
2104         u32 rate, cps;
2105         u64 ncells;
2106         u8 lacr;
2107
2108         spin_lock_irqsave(&vc->lock, flags);
2109         est = vc->estimator;
2110         if (!est)
2111                 goto out;
2112
2113         ncells = est->cells;
2114
2115         rate = ((u32)(ncells - est->last_cells)) << (7 - est->interval);
2116         est->last_cells = ncells;
2117         est->avcps += ((long)rate - (long)est->avcps) >> est->ewma_log;
2118         est->cps = (est->avcps + 0x1f) >> 5;
2119
2120         cps = est->cps;
2121         if (cps < (est->maxcps >> 4))
2122                 cps = est->maxcps >> 4;
2123
2124         lacr = idt77252_rate_logindex(card, cps);
2125         if (lacr > vc->max_er)
2126                 lacr = vc->max_er;
2127
2128         if (lacr != vc->lacr) {
2129                 vc->lacr = lacr;
2130                 writel(TCMDQ_LACR|(vc->lacr << 16)|vc->index, SAR_REG_TCMDQ);
2131         }
2132
2133         est->timer.expires = jiffies + ((HZ / 4) << est->interval);
2134         add_timer(&est->timer);
2135
2136 out:
2137         spin_unlock_irqrestore(&vc->lock, flags);
2138 }
2139
2140 static struct rate_estimator *
2141 idt77252_init_est(struct vc_map *vc, int pcr)
2142 {
2143         struct rate_estimator *est;
2144
2145         est = kmalloc(sizeof(struct rate_estimator), GFP_KERNEL);
2146         if (!est)
2147                 return NULL;
2148         memset(est, 0, sizeof(*est));
2149
2150         est->maxcps = pcr < 0 ? -pcr : pcr;
2151         est->cps = est->maxcps;
2152         est->avcps = est->cps << 5;
2153
2154         est->interval = 2;              /* XXX: make this configurable */
2155         est->ewma_log = 2;              /* XXX: make this configurable */
2156         init_timer(&est->timer);
2157         est->timer.data = (unsigned long)vc;
2158         est->timer.function = idt77252_est_timer;
2159
2160         est->timer.expires = jiffies + ((HZ / 4) << est->interval);
2161         add_timer(&est->timer);
2162
2163         return est;
2164 }
2165
2166 static int
2167 idt77252_init_cbr(struct idt77252_dev *card, struct vc_map *vc,
2168                   struct atm_vcc *vcc, struct atm_qos *qos)
2169 {
2170         int tst_free, tst_used, tst_entries;
2171         unsigned long tmpl, modl;
2172         int tcr, tcra;
2173
2174         if ((qos->txtp.max_pcr == 0) &&
2175             (qos->txtp.pcr == 0) && (qos->txtp.min_pcr == 0)) {
2176                 printk("%s: trying to open a CBR VC with cell rate = 0\n",
2177                        card->name);
2178                 return -EINVAL;
2179         }
2180
2181         tst_used = 0;
2182         tst_free = card->tst_free;
2183         if (test_bit(VCF_TX, &vc->flags))
2184                 tst_used = vc->ntste;
2185         tst_free += tst_used;
2186
2187         tcr = atm_pcr_goal(&qos->txtp);
2188         tcra = tcr >= 0 ? tcr : -tcr;
2189
2190         TXPRINTK("%s: CBR target cell rate = %d\n", card->name, tcra);
2191
2192         tmpl = (unsigned long) tcra * ((unsigned long) card->tst_size - 2);
2193         modl = tmpl % (unsigned long)card->utopia_pcr;
2194
2195         tst_entries = (int) (tmpl / card->utopia_pcr);
2196         if (tcr > 0) {
2197                 if (modl > 0)
2198                         tst_entries++;
2199         } else if (tcr == 0) {
2200                 tst_entries = tst_free - SAR_TST_RESERVED;
2201                 if (tst_entries <= 0) {
2202                         printk("%s: no CBR bandwidth free.\n", card->name);
2203                         return -ENOSR;
2204                 }
2205         }
2206
2207         if (tst_entries == 0) {
2208                 printk("%s: selected CBR bandwidth < granularity.\n",
2209                        card->name);
2210                 return -EINVAL;
2211         }
2212
2213         if (tst_entries > (tst_free - SAR_TST_RESERVED)) {
2214                 printk("%s: not enough CBR bandwidth free.\n", card->name);
2215                 return -ENOSR;
2216         }
2217
2218         vc->ntste = tst_entries;
2219
2220         card->tst_free = tst_free - tst_entries;
2221         if (test_bit(VCF_TX, &vc->flags)) {
2222                 if (tst_used == tst_entries)
2223                         return 0;
2224
2225                 OPRINTK("%s: modify %d -> %d entries in TST.\n",
2226                         card->name, tst_used, tst_entries);
2227                 change_tst(card, vc, tst_entries, TSTE_OPC_CBR);
2228                 return 0;
2229         }
2230
2231         OPRINTK("%s: setting %d entries in TST.\n", card->name, tst_entries);
2232         fill_tst(card, vc, tst_entries, TSTE_OPC_CBR);
2233         return 0;
2234 }
2235
2236 static int
2237 idt77252_init_ubr(struct idt77252_dev *card, struct vc_map *vc,
2238                   struct atm_vcc *vcc, struct atm_qos *qos)
2239 {
2240         unsigned long flags;
2241         int tcr;
2242
2243         spin_lock_irqsave(&vc->lock, flags);
2244         if (vc->estimator) {
2245                 del_timer(&vc->estimator->timer);
2246                 kfree(vc->estimator);
2247                 vc->estimator = NULL;
2248         }
2249         spin_unlock_irqrestore(&vc->lock, flags);
2250
2251         tcr = atm_pcr_goal(&qos->txtp);
2252         if (tcr == 0)
2253                 tcr = card->link_pcr;
2254
2255         vc->estimator = idt77252_init_est(vc, tcr);
2256
2257         vc->class = SCHED_UBR;
2258         vc->init_er = idt77252_rate_logindex(card, tcr);
2259         vc->lacr = vc->init_er;
2260         if (tcr < 0)
2261                 vc->max_er = vc->init_er;
2262         else
2263                 vc->max_er = 0xff;
2264
2265         return 0;
2266 }
2267
2268 static int
2269 idt77252_init_tx(struct idt77252_dev *card, struct vc_map *vc,
2270                  struct atm_vcc *vcc, struct atm_qos *qos)
2271 {
2272         int error;
2273
2274         if (test_bit(VCF_TX, &vc->flags))
2275                 return -EBUSY;
2276
2277         switch (qos->txtp.traffic_class) {
2278                 case ATM_CBR:
2279                         vc->class = SCHED_CBR;
2280                         break;
2281
2282                 case ATM_UBR:
2283                         vc->class = SCHED_UBR;
2284                         break;
2285
2286                 case ATM_VBR:
2287                 case ATM_ABR:
2288                 default:
2289                         return -EPROTONOSUPPORT;
2290         }
2291
2292         vc->scq = alloc_scq(card, vc->class);
2293         if (!vc->scq) {
2294                 printk("%s: can't get SCQ.\n", card->name);
2295                 return -ENOMEM;
2296         }
2297
2298         vc->scq->scd = get_free_scd(card, vc);
2299         if (vc->scq->scd == 0) {
2300                 printk("%s: no SCD available.\n", card->name);
2301                 free_scq(card, vc->scq);
2302                 return -ENOMEM;
2303         }
2304
2305         fill_scd(card, vc->scq, vc->class);
2306
2307         if (set_tct(card, vc)) {
2308                 printk("%s: class %d not supported.\n",
2309                        card->name, qos->txtp.traffic_class);
2310
2311                 card->scd2vc[vc->scd_index] = NULL;
2312                 free_scq(card, vc->scq);
2313                 return -EPROTONOSUPPORT;
2314         }
2315
2316         switch (vc->class) {
2317                 case SCHED_CBR:
2318                         error = idt77252_init_cbr(card, vc, vcc, qos);
2319                         if (error) {
2320                                 card->scd2vc[vc->scd_index] = NULL;
2321                                 free_scq(card, vc->scq);
2322                                 return error;
2323                         }
2324
2325                         clear_bit(VCF_IDLE, &vc->flags);
2326                         writel(TCMDQ_START | vc->index, SAR_REG_TCMDQ);
2327                         break;
2328
2329                 case SCHED_UBR:
2330                         error = idt77252_init_ubr(card, vc, vcc, qos);
2331                         if (error) {
2332                                 card->scd2vc[vc->scd_index] = NULL;
2333                                 free_scq(card, vc->scq);
2334                                 return error;
2335                         }
2336
2337                         set_bit(VCF_IDLE, &vc->flags);
2338                         break;
2339         }
2340
2341         vc->tx_vcc = vcc;
2342         set_bit(VCF_TX, &vc->flags);
2343         return 0;
2344 }
2345
2346 static int
2347 idt77252_init_rx(struct idt77252_dev *card, struct vc_map *vc,
2348                  struct atm_vcc *vcc, struct atm_qos *qos)
2349 {
2350         unsigned long flags;
2351         unsigned long addr;
2352         u32 rcte = 0;
2353
2354         if (test_bit(VCF_RX, &vc->flags))
2355                 return -EBUSY;
2356
2357         vc->rx_vcc = vcc;
2358         set_bit(VCF_RX, &vc->flags);
2359
2360         if ((vcc->vci == 3) || (vcc->vci == 4))
2361                 return 0;
2362
2363         flush_rx_pool(card, &vc->rcv.rx_pool);
2364
2365         rcte |= SAR_RCTE_CONNECTOPEN;
2366         rcte |= SAR_RCTE_RAWCELLINTEN;
2367
2368         switch (qos->aal) {
2369                 case ATM_AAL0:
2370                         rcte |= SAR_RCTE_RCQ;
2371                         break;
2372                 case ATM_AAL1:
2373                         rcte |= SAR_RCTE_OAM; /* Let SAR drop Video */
2374                         break;
2375                 case ATM_AAL34:
2376                         rcte |= SAR_RCTE_AAL34;
2377                         break;
2378                 case ATM_AAL5:
2379                         rcte |= SAR_RCTE_AAL5;
2380                         break;
2381                 default:
2382                         rcte |= SAR_RCTE_RCQ;
2383                         break;
2384         }
2385
2386         if (qos->aal != ATM_AAL5)
2387                 rcte |= SAR_RCTE_FBP_1;
2388         else if (qos->rxtp.max_sdu > SAR_FB_SIZE_2)
2389                 rcte |= SAR_RCTE_FBP_3;
2390         else if (qos->rxtp.max_sdu > SAR_FB_SIZE_1)
2391                 rcte |= SAR_RCTE_FBP_2;
2392         else if (qos->rxtp.max_sdu > SAR_FB_SIZE_0)
2393                 rcte |= SAR_RCTE_FBP_1;
2394         else
2395                 rcte |= SAR_RCTE_FBP_01;
2396
2397         addr = card->rct_base + (vc->index << 2);
2398
2399         OPRINTK("%s: writing RCT at 0x%lx\n", card->name, addr);
2400         write_sram(card, addr, rcte);
2401
2402         spin_lock_irqsave(&card->cmd_lock, flags);
2403         writel(SAR_CMD_OPEN_CONNECTION | (addr << 2), SAR_REG_CMD);
2404         waitfor_idle(card);
2405         spin_unlock_irqrestore(&card->cmd_lock, flags);
2406
2407         return 0;
2408 }
2409
2410 static int
2411 idt77252_open(struct atm_vcc *vcc)
2412 {
2413         struct atm_dev *dev = vcc->dev;
2414         struct idt77252_dev *card = dev->dev_data;
2415         struct vc_map *vc;
2416         unsigned int index;
2417         unsigned int inuse;
2418         int error;
2419         int vci = vcc->vci;
2420         short vpi = vcc->vpi;
2421
2422         if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC)
2423                 return 0;
2424
2425         if (vpi >= (1 << card->vpibits)) {
2426                 printk("%s: unsupported VPI: %d\n", card->name, vpi);
2427                 return -EINVAL;
2428         }
2429
2430         if (vci >= (1 << card->vcibits)) {
2431                 printk("%s: unsupported VCI: %d\n", card->name, vci);
2432                 return -EINVAL;
2433         }
2434
2435         set_bit(ATM_VF_ADDR, &vcc->flags);
2436
2437         down(&card->mutex);
2438
2439         OPRINTK("%s: opening vpi.vci: %d.%d\n", card->name, vpi, vci);
2440
2441         switch (vcc->qos.aal) {
2442         case ATM_AAL0:
2443         case ATM_AAL1:
2444         case ATM_AAL5:
2445                 break;
2446         default:
2447                 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal);
2448                 up(&card->mutex);
2449                 return -EPROTONOSUPPORT;
2450         }
2451
2452         index = VPCI2VC(card, vpi, vci);
2453         if (!card->vcs[index]) {
2454                 card->vcs[index] = kmalloc(sizeof(struct vc_map), GFP_KERNEL);
2455                 if (!card->vcs[index]) {
2456                         printk("%s: can't alloc vc in open()\n", card->name);
2457                         up(&card->mutex);
2458                         return -ENOMEM;
2459                 }
2460                 memset(card->vcs[index], 0, sizeof(struct vc_map));
2461
2462                 card->vcs[index]->card = card;
2463                 card->vcs[index]->index = index;
2464
2465                 spin_lock_init(&card->vcs[index]->lock);
2466         }
2467         vc = card->vcs[index];
2468
2469         vcc->dev_data = vc;
2470
2471         IPRINTK("%s: idt77252_open: vc = %d (%d.%d) %s/%s (max RX SDU: %u)\n",
2472                 card->name, vc->index, vcc->vpi, vcc->vci,
2473                 vcc->qos.rxtp.traffic_class != ATM_NONE ? "rx" : "--",
2474                 vcc->qos.txtp.traffic_class != ATM_NONE ? "tx" : "--",
2475                 vcc->qos.rxtp.max_sdu);
2476
2477         inuse = 0;
2478         if (vcc->qos.txtp.traffic_class != ATM_NONE &&
2479             test_bit(VCF_TX, &vc->flags))
2480                 inuse = 1;
2481         if (vcc->qos.rxtp.traffic_class != ATM_NONE &&
2482             test_bit(VCF_RX, &vc->flags))
2483                 inuse += 2;
2484
2485         if (inuse) {
2486                 printk("%s: %s vci already in use.\n", card->name,
2487                        inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx");
2488                 up(&card->mutex);
2489                 return -EADDRINUSE;
2490         }
2491
2492         if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2493                 error = idt77252_init_tx(card, vc, vcc, &vcc->qos);
2494                 if (error) {
2495                         up(&card->mutex);
2496                         return error;
2497                 }
2498         }
2499
2500         if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2501                 error = idt77252_init_rx(card, vc, vcc, &vcc->qos);
2502                 if (error) {
2503                         up(&card->mutex);
2504                         return error;
2505                 }
2506         }
2507
2508         set_bit(ATM_VF_READY, &vcc->flags);
2509
2510         up(&card->mutex);
2511         return 0;
2512 }
2513
2514 static void
2515 idt77252_close(struct atm_vcc *vcc)
2516 {
2517         struct atm_dev *dev = vcc->dev;
2518         struct idt77252_dev *card = dev->dev_data;
2519         struct vc_map *vc = vcc->dev_data;
2520         unsigned long flags;
2521         unsigned long addr;
2522         unsigned long timeout;
2523
2524         down(&card->mutex);
2525
2526         IPRINTK("%s: idt77252_close: vc = %d (%d.%d)\n",
2527                 card->name, vc->index, vcc->vpi, vcc->vci);
2528
2529         clear_bit(ATM_VF_READY, &vcc->flags);
2530
2531         if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2532
2533                 spin_lock_irqsave(&vc->lock, flags);
2534                 clear_bit(VCF_RX, &vc->flags);
2535                 vc->rx_vcc = NULL;
2536                 spin_unlock_irqrestore(&vc->lock, flags);
2537
2538                 if ((vcc->vci == 3) || (vcc->vci == 4))
2539                         goto done;
2540
2541                 addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE;
2542
2543                 spin_lock_irqsave(&card->cmd_lock, flags);
2544                 writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2), SAR_REG_CMD);
2545                 waitfor_idle(card);
2546                 spin_unlock_irqrestore(&card->cmd_lock, flags);
2547
2548                 if (vc->rcv.rx_pool.count) {
2549                         DPRINTK("%s: closing a VC with pending rx buffers.\n",
2550                                 card->name);
2551
2552                         recycle_rx_pool_skb(card, &vc->rcv.rx_pool);
2553                 }
2554         }
2555
2556 done:
2557         if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2558
2559                 spin_lock_irqsave(&vc->lock, flags);
2560                 clear_bit(VCF_TX, &vc->flags);
2561                 clear_bit(VCF_IDLE, &vc->flags);
2562                 clear_bit(VCF_RSV, &vc->flags);
2563                 vc->tx_vcc = NULL;
2564
2565                 if (vc->estimator) {
2566                         del_timer(&vc->estimator->timer);
2567                         kfree(vc->estimator);
2568                         vc->estimator = NULL;
2569                 }
2570                 spin_unlock_irqrestore(&vc->lock, flags);
2571
2572                 timeout = 5 * 1000;
2573                 while (atomic_read(&vc->scq->used) > 0) {
2574                         timeout = msleep_interruptible(timeout);
2575                         if (!timeout)
2576                                 break;
2577                 }
2578                 if (!timeout)
2579                         printk("%s: SCQ drain timeout: %u used\n",
2580                                card->name, atomic_read(&vc->scq->used));
2581
2582                 writel(TCMDQ_HALT | vc->index, SAR_REG_TCMDQ);
2583                 clear_scd(card, vc->scq, vc->class);
2584
2585                 if (vc->class == SCHED_CBR) {
2586                         clear_tst(card, vc);
2587                         card->tst_free += vc->ntste;
2588                         vc->ntste = 0;
2589                 }
2590
2591                 card->scd2vc[vc->scd_index] = NULL;
2592                 free_scq(card, vc->scq);
2593         }
2594
2595         up(&card->mutex);
2596 }
2597
2598 static int
2599 idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos, int flags)
2600 {
2601         struct atm_dev *dev = vcc->dev;
2602         struct idt77252_dev *card = dev->dev_data;
2603         struct vc_map *vc = vcc->dev_data;
2604         int error = 0;
2605
2606         down(&card->mutex);
2607
2608         if (qos->txtp.traffic_class != ATM_NONE) {
2609                 if (!test_bit(VCF_TX, &vc->flags)) {
2610                         error = idt77252_init_tx(card, vc, vcc, qos);
2611                         if (error)
2612                                 goto out;
2613                 } else {
2614                         switch (qos->txtp.traffic_class) {
2615                         case ATM_CBR:
2616                                 error = idt77252_init_cbr(card, vc, vcc, qos);
2617                                 if (error)
2618                                         goto out;
2619                                 break;
2620
2621                         case ATM_UBR:
2622                                 error = idt77252_init_ubr(card, vc, vcc, qos);
2623                                 if (error)
2624                                         goto out;
2625
2626                                 if (!test_bit(VCF_IDLE, &vc->flags)) {
2627                                         writel(TCMDQ_LACR | (vc->lacr << 16) |
2628                                                vc->index, SAR_REG_TCMDQ);
2629                                 }
2630                                 break;
2631
2632                         case ATM_VBR:
2633                         case ATM_ABR:
2634                                 error = -EOPNOTSUPP;
2635                                 goto out;
2636                         }
2637                 }
2638         }
2639
2640         if ((qos->rxtp.traffic_class != ATM_NONE) &&
2641             !test_bit(VCF_RX, &vc->flags)) {
2642                 error = idt77252_init_rx(card, vc, vcc, qos);
2643                 if (error)
2644                         goto out;
2645         }
2646
2647         memcpy(&vcc->qos, qos, sizeof(struct atm_qos));
2648
2649         set_bit(ATM_VF_HASQOS, &vcc->flags);
2650
2651 out:
2652         up(&card->mutex);
2653         return error;
2654 }
2655
2656 static int
2657 idt77252_proc_read(struct atm_dev *dev, loff_t * pos, char *page)
2658 {
2659         struct idt77252_dev *card = dev->dev_data;
2660         int i, left;
2661
2662         left = (int) *pos;
2663         if (!left--)
2664                 return sprintf(page, "IDT77252 Interrupts:\n");
2665         if (!left--)
2666                 return sprintf(page, "TSIF:  %lu\n", card->irqstat[15]);
2667         if (!left--)
2668                 return sprintf(page, "TXICP: %lu\n", card->irqstat[14]);
2669         if (!left--)
2670                 return sprintf(page, "TSQF:  %lu\n", card->irqstat[12]);
2671         if (!left--)
2672                 return sprintf(page, "TMROF: %lu\n", card->irqstat[11]);
2673         if (!left--)
2674                 return sprintf(page, "PHYI:  %lu\n", card->irqstat[10]);
2675         if (!left--)
2676                 return sprintf(page, "FBQ3A: %lu\n", card->irqstat[8]);
2677         if (!left--)
2678                 return sprintf(page, "FBQ2A: %lu\n", card->irqstat[7]);
2679         if (!left--)
2680                 return sprintf(page, "RSQF:  %lu\n", card->irqstat[6]);
2681         if (!left--)
2682                 return sprintf(page, "EPDU:  %lu\n", card->irqstat[5]);
2683         if (!left--)
2684                 return sprintf(page, "RAWCF: %lu\n", card->irqstat[4]);
2685         if (!left--)
2686                 return sprintf(page, "FBQ1A: %lu\n", card->irqstat[3]);
2687         if (!left--)
2688                 return sprintf(page, "FBQ0A: %lu\n", card->irqstat[2]);
2689         if (!left--)
2690                 return sprintf(page, "RSQAF: %lu\n", card->irqstat[1]);
2691         if (!left--)
2692                 return sprintf(page, "IDT77252 Transmit Connection Table:\n");
2693
2694         for (i = 0; i < card->tct_size; i++) {
2695                 unsigned long tct;
2696                 struct atm_vcc *vcc;
2697                 struct vc_map *vc;
2698                 char *p;
2699
2700                 vc = card->vcs[i];
2701                 if (!vc)
2702                         continue;
2703
2704                 vcc = NULL;
2705                 if (vc->tx_vcc)
2706                         vcc = vc->tx_vcc;
2707                 if (!vcc)
2708                         continue;
2709                 if (left--)
2710                         continue;
2711
2712                 p = page;
2713                 p += sprintf(p, "  %4u: %u.%u: ", i, vcc->vpi, vcc->vci);
2714                 tct = (unsigned long) (card->tct_base + i * SAR_SRAM_TCT_SIZE);
2715
2716                 for (i = 0; i < 8; i++)
2717                         p += sprintf(p, " %08x", read_sram(card, tct + i));
2718                 p += sprintf(p, "\n");
2719                 return p - page;
2720         }
2721         return 0;
2722 }
2723
2724 /*****************************************************************************/
2725 /*                                                                           */
2726 /* Interrupt handler                                                         */
2727 /*                                                                           */
2728 /*****************************************************************************/
2729
2730 static void
2731 idt77252_collect_stat(struct idt77252_dev *card)
2732 {
2733         u32 cdc, vpec, icc;
2734
2735         cdc = readl(SAR_REG_CDC);
2736         vpec = readl(SAR_REG_VPEC);
2737         icc = readl(SAR_REG_ICC);
2738
2739 #ifdef  NOTDEF
2740         printk("%s:", card->name);
2741
2742         if (cdc & 0x7f0000) {
2743                 char *s = "";
2744
2745                 printk(" [");
2746                 if (cdc & (1 << 22)) {
2747                         printk("%sRM ID", s);
2748                         s = " | ";
2749                 }
2750                 if (cdc & (1 << 21)) {
2751                         printk("%sCON TAB", s);
2752                         s = " | ";
2753                 }
2754                 if (cdc & (1 << 20)) {
2755                         printk("%sNO FB", s);
2756                         s = " | ";
2757                 }
2758                 if (cdc & (1 << 19)) {
2759                         printk("%sOAM CRC", s);
2760                         s = " | ";
2761                 }
2762                 if (cdc & (1 << 18)) {
2763                         printk("%sRM CRC", s);
2764                         s = " | ";
2765                 }
2766                 if (cdc & (1 << 17)) {
2767                         printk("%sRM FIFO", s);
2768                         s = " | ";
2769                 }
2770                 if (cdc & (1 << 16)) {
2771                         printk("%sRX FIFO", s);
2772                         s = " | ";
2773                 }
2774                 printk("]");
2775         }
2776
2777         printk(" CDC %04x, VPEC %04x, ICC: %04x\n",
2778                cdc & 0xffff, vpec & 0xffff, icc & 0xffff);
2779 #endif
2780 }
2781
2782 static irqreturn_t
2783 idt77252_interrupt(int irq, void *dev_id, struct pt_regs *ptregs)
2784 {
2785         struct idt77252_dev *card = dev_id;
2786         u32 stat;
2787
2788         stat = readl(SAR_REG_STAT) & 0xffff;
2789         if (!stat)      /* no interrupt for us */
2790                 return IRQ_NONE;
2791
2792         if (test_and_set_bit(IDT77252_BIT_INTERRUPT, &card->flags)) {
2793                 printk("%s: Re-entering irq_handler()\n", card->name);
2794                 goto out;
2795         }
2796
2797         writel(stat, SAR_REG_STAT);     /* reset interrupt */
2798
2799         if (stat & SAR_STAT_TSIF) {     /* entry written to TSQ  */
2800                 INTPRINTK("%s: TSIF\n", card->name);
2801                 card->irqstat[15]++;
2802                 idt77252_tx(card);
2803         }
2804         if (stat & SAR_STAT_TXICP) {    /* Incomplete CS-PDU has  */
2805                 INTPRINTK("%s: TXICP\n", card->name);
2806                 card->irqstat[14]++;
2807 #ifdef CONFIG_ATM_IDT77252_DEBUG
2808                 idt77252_tx_dump(card);
2809 #endif
2810         }
2811         if (stat & SAR_STAT_TSQF) {     /* TSQ 7/8 full           */
2812                 INTPRINTK("%s: TSQF\n", card->name);
2813                 card->irqstat[12]++;
2814                 idt77252_tx(card);
2815         }
2816         if (stat & SAR_STAT_TMROF) {    /* Timer overflow         */
2817                 INTPRINTK("%s: TMROF\n", card->name);
2818                 card->irqstat[11]++;
2819                 idt77252_collect_stat(card);
2820         }
2821
2822         if (stat & SAR_STAT_EPDU) {     /* Got complete CS-PDU    */
2823                 INTPRINTK("%s: EPDU\n", card->name);
2824                 card->irqstat[5]++;
2825                 idt77252_rx(card);
2826         }
2827         if (stat & SAR_STAT_RSQAF) {    /* RSQ is 7/8 full        */
2828                 INTPRINTK("%s: RSQAF\n", card->name);
2829                 card->irqstat[1]++;
2830                 idt77252_rx(card);
2831         }
2832         if (stat & SAR_STAT_RSQF) {     /* RSQ is full            */
2833                 INTPRINTK("%s: RSQF\n", card->name);
2834                 card->irqstat[6]++;
2835                 idt77252_rx(card);
2836         }
2837         if (stat & SAR_STAT_RAWCF) {    /* Raw cell received      */
2838                 INTPRINTK("%s: RAWCF\n", card->name);
2839                 card->irqstat[4]++;
2840                 idt77252_rx_raw(card);
2841         }
2842
2843         if (stat & SAR_STAT_PHYI) {     /* PHY device interrupt   */
2844                 INTPRINTK("%s: PHYI", card->name);
2845                 card->irqstat[10]++;
2846                 if (card->atmdev->phy && card->atmdev->phy->interrupt)
2847                         card->atmdev->phy->interrupt(card->atmdev);
2848         }
2849
2850         if (stat & (SAR_STAT_FBQ0A | SAR_STAT_FBQ1A |
2851                     SAR_STAT_FBQ2A | SAR_STAT_FBQ3A)) {
2852
2853                 writel(readl(SAR_REG_CFG) & ~(SAR_CFG_FBIE), SAR_REG_CFG);
2854
2855                 INTPRINTK("%s: FBQA: %04x\n", card->name, stat);
2856
2857                 if (stat & SAR_STAT_FBQ0A)
2858                         card->irqstat[2]++;
2859                 if (stat & SAR_STAT_FBQ1A)
2860                         card->irqstat[3]++;
2861                 if (stat & SAR_STAT_FBQ2A)
2862                         card->irqstat[7]++;
2863                 if (stat & SAR_STAT_FBQ3A)
2864                         card->irqstat[8]++;
2865
2866                 schedule_work(&card->tqueue);
2867         }
2868
2869 out:
2870         clear_bit(IDT77252_BIT_INTERRUPT, &card->flags);
2871         return IRQ_HANDLED;
2872 }
2873
2874 static void
2875 idt77252_softint(void *dev_id)
2876 {
2877         struct idt77252_dev *card = dev_id;
2878         u32 stat;
2879         int done;
2880
2881         for (done = 1; ; done = 1) {
2882                 stat = readl(SAR_REG_STAT) >> 16;
2883
2884                 if ((stat & 0x0f) < SAR_FBQ0_HIGH) {
2885                         add_rx_skb(card, 0, SAR_FB_SIZE_0, 32);
2886                         done = 0;
2887                 }
2888
2889                 stat >>= 4;
2890                 if ((stat & 0x0f) < SAR_FBQ1_HIGH) {
2891                         add_rx_skb(card, 1, SAR_FB_SIZE_1, 32);
2892                         done = 0;
2893                 }
2894
2895                 stat >>= 4;
2896                 if ((stat & 0x0f) < SAR_FBQ2_HIGH) {
2897                         add_rx_skb(card, 2, SAR_FB_SIZE_2, 32);
2898                         done = 0;
2899                 }
2900
2901                 stat >>= 4;
2902                 if ((stat & 0x0f) < SAR_FBQ3_HIGH) {
2903                         add_rx_skb(card, 3, SAR_FB_SIZE_3, 32);
2904                         done = 0;
2905                 }
2906
2907                 if (done)
2908                         break;
2909         }
2910
2911         writel(readl(SAR_REG_CFG) | SAR_CFG_FBIE, SAR_REG_CFG);
2912 }
2913
2914
2915 static int
2916 open_card_oam(struct idt77252_dev *card)
2917 {
2918         unsigned long flags;
2919         unsigned long addr;
2920         struct vc_map *vc;
2921         int vpi, vci;
2922         int index;
2923         u32 rcte;
2924
2925         for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
2926                 for (vci = 3; vci < 5; vci++) {
2927                         index = VPCI2VC(card, vpi, vci);
2928
2929                         vc = kmalloc(sizeof(struct vc_map), GFP_KERNEL);
2930                         if (!vc) {
2931                                 printk("%s: can't alloc vc\n", card->name);
2932                                 return -ENOMEM;
2933                         }
2934                         memset(vc, 0, sizeof(struct vc_map));
2935
2936                         vc->index = index;
2937                         card->vcs[index] = vc;
2938
2939                         flush_rx_pool(card, &vc->rcv.rx_pool);
2940
2941                         rcte = SAR_RCTE_CONNECTOPEN |
2942                                SAR_RCTE_RAWCELLINTEN |
2943                                SAR_RCTE_RCQ |
2944                                SAR_RCTE_FBP_1;
2945
2946                         addr = card->rct_base + (vc->index << 2);
2947                         write_sram(card, addr, rcte);
2948
2949                         spin_lock_irqsave(&card->cmd_lock, flags);
2950                         writel(SAR_CMD_OPEN_CONNECTION | (addr << 2),
2951                                SAR_REG_CMD);
2952                         waitfor_idle(card);
2953                         spin_unlock_irqrestore(&card->cmd_lock, flags);
2954                 }
2955         }
2956
2957         return 0;
2958 }
2959
2960 static void
2961 close_card_oam(struct idt77252_dev *card)
2962 {
2963         unsigned long flags;
2964         unsigned long addr;
2965         struct vc_map *vc;
2966         int vpi, vci;
2967         int index;
2968
2969         for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
2970                 for (vci = 3; vci < 5; vci++) {
2971                         index = VPCI2VC(card, vpi, vci);
2972                         vc = card->vcs[index];
2973
2974                         addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE;
2975
2976                         spin_lock_irqsave(&card->cmd_lock, flags);
2977                         writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2),
2978                                SAR_REG_CMD);
2979                         waitfor_idle(card);
2980                         spin_unlock_irqrestore(&card->cmd_lock, flags);
2981
2982                         if (vc->rcv.rx_pool.count) {
2983                                 DPRINTK("%s: closing a VC "
2984                                         "with pending rx buffers.\n",
2985                                         card->name);
2986
2987                                 recycle_rx_pool_skb(card, &vc->rcv.rx_pool);
2988                         }
2989                 }
2990         }
2991 }
2992
2993 static int
2994 open_card_ubr0(struct idt77252_dev *card)
2995 {
2996         struct vc_map *vc;
2997
2998         vc = kmalloc(sizeof(struct vc_map), GFP_KERNEL);
2999         if (!vc) {
3000                 printk("%s: can't alloc vc\n", card->name);
3001                 return -ENOMEM;
3002         }
3003         memset(vc, 0, sizeof(struct vc_map));
3004         card->vcs[0] = vc;
3005         vc->class = SCHED_UBR0;
3006
3007         vc->scq = alloc_scq(card, vc->class);
3008         if (!vc->scq) {
3009                 printk("%s: can't get SCQ.\n", card->name);
3010                 return -ENOMEM;
3011         }
3012
3013         card->scd2vc[0] = vc;
3014         vc->scd_index = 0;
3015         vc->scq->scd = card->scd_base;
3016
3017         fill_scd(card, vc->scq, vc->class);
3018
3019         write_sram(card, card->tct_base + 0, TCT_UBR | card->scd_base);
3020         write_sram(card, card->tct_base + 1, 0);
3021         write_sram(card, card->tct_base + 2, 0);
3022         write_sram(card, card->tct_base + 3, 0);
3023         write_sram(card, card->tct_base + 4, 0);
3024         write_sram(card, card->tct_base + 5, 0);
3025         write_sram(card, card->tct_base + 6, 0);
3026         write_sram(card, card->tct_base + 7, TCT_FLAG_UBR);
3027
3028         clear_bit(VCF_IDLE, &vc->flags);
3029         writel(TCMDQ_START | 0, SAR_REG_TCMDQ);
3030         return 0;
3031 }
3032
3033 static int
3034 idt77252_dev_open(struct idt77252_dev *card)
3035 {
3036         u32 conf;
3037
3038         if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
3039                 printk("%s: SAR not yet initialized.\n", card->name);
3040                 return -1;
3041         }
3042
3043         conf = SAR_CFG_RXPTH|   /* enable receive path                  */
3044             SAR_RX_DELAY |      /* interrupt on complete PDU            */
3045             SAR_CFG_RAWIE |     /* interrupt enable on raw cells        */
3046             SAR_CFG_RQFIE |     /* interrupt on RSQ almost full         */
3047             SAR_CFG_TMOIE |     /* interrupt on timer overflow          */
3048             SAR_CFG_FBIE |      /* interrupt on low free buffers        */
3049             SAR_CFG_TXEN |      /* transmit operation enable            */
3050             SAR_CFG_TXINT |     /* interrupt on transmit status         */
3051             SAR_CFG_TXUIE |     /* interrupt on transmit underrun       */
3052             SAR_CFG_TXSFI |     /* interrupt on TSQ almost full         */
3053             SAR_CFG_PHYIE       /* enable PHY interrupts                */
3054             ;
3055
3056 #ifdef CONFIG_ATM_IDT77252_RCV_ALL
3057         /* Test RAW cell receive. */
3058         conf |= SAR_CFG_VPECA;
3059 #endif
3060
3061         writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
3062
3063         if (open_card_oam(card)) {
3064                 printk("%s: Error initializing OAM.\n", card->name);
3065                 return -1;
3066         }
3067
3068         if (open_card_ubr0(card)) {
3069                 printk("%s: Error initializing UBR0.\n", card->name);
3070                 return -1;
3071         }
3072
3073         IPRINTK("%s: opened IDT77252 ABR SAR.\n", card->name);
3074         return 0;
3075 }
3076
3077 void
3078 idt77252_dev_close(struct atm_dev *dev)
3079 {
3080         struct idt77252_dev *card = dev->dev_data;
3081         u32 conf;
3082
3083         close_card_oam(card);
3084
3085         conf = SAR_CFG_RXPTH |  /* enable receive path           */
3086             SAR_RX_DELAY |      /* interrupt on complete PDU     */
3087             SAR_CFG_RAWIE |     /* interrupt enable on raw cells */
3088             SAR_CFG_RQFIE |     /* interrupt on RSQ almost full  */
3089             SAR_CFG_TMOIE |     /* interrupt on timer overflow   */
3090             SAR_CFG_FBIE |      /* interrupt on low free buffers */
3091             SAR_CFG_TXEN |      /* transmit operation enable     */
3092             SAR_CFG_TXINT |     /* interrupt on transmit status  */
3093             SAR_CFG_TXUIE |     /* interrupt on xmit underrun    */
3094             SAR_CFG_TXSFI       /* interrupt on TSQ almost full  */
3095             ;
3096
3097         writel(readl(SAR_REG_CFG) & ~(conf), SAR_REG_CFG);
3098
3099         DIPRINTK("%s: closed IDT77252 ABR SAR.\n", card->name);
3100 }
3101
3102
3103 /*****************************************************************************/
3104 /*                                                                           */
3105 /* Initialisation and Deinitialization of IDT77252                           */
3106 /*                                                                           */
3107 /*****************************************************************************/
3108
3109
3110 static void
3111 deinit_card(struct idt77252_dev *card)
3112 {
3113         struct sk_buff *skb;
3114         int i, j;
3115
3116         if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
3117                 printk("%s: SAR not yet initialized.\n", card->name);
3118                 return;
3119         }
3120         DIPRINTK("idt77252: deinitialize card %u\n", card->index);
3121
3122         writel(0, SAR_REG_CFG);
3123
3124         if (card->atmdev)
3125                 atm_dev_deregister(card->atmdev);
3126
3127         for (i = 0; i < 4; i++) {
3128                 for (j = 0; j < FBQ_SIZE; j++) {
3129                         skb = card->sbpool[i].skb[j];
3130                         if (skb) {
3131                                 pci_unmap_single(card->pcidev,
3132                                                  IDT77252_PRV_PADDR(skb),
3133                                                  skb->end - skb->data,
3134                                                  PCI_DMA_FROMDEVICE);
3135                                 card->sbpool[i].skb[j] = NULL;
3136                                 dev_kfree_skb(skb);
3137                         }
3138                 }
3139         }
3140
3141         vfree(card->soft_tst);
3142
3143         vfree(card->scd2vc);
3144
3145         vfree(card->vcs);
3146
3147         if (card->raw_cell_hnd) {
3148                 pci_free_consistent(card->pcidev, 2 * sizeof(u32),
3149                                     card->raw_cell_hnd, card->raw_cell_paddr);
3150         }
3151
3152         if (card->rsq.base) {
3153                 DIPRINTK("%s: Release RSQ ...\n", card->name);
3154                 deinit_rsq(card);
3155         }
3156
3157         if (card->tsq.base) {
3158                 DIPRINTK("%s: Release TSQ ...\n", card->name);
3159                 deinit_tsq(card);
3160         }
3161
3162         DIPRINTK("idt77252: Release IRQ.\n");
3163         free_irq(card->pcidev->irq, card);
3164
3165         for (i = 0; i < 4; i++) {
3166                 if (card->fbq[i])
3167                         iounmap(card->fbq[i]);
3168         }
3169
3170         if (card->membase)
3171                 iounmap(card->membase);
3172
3173         clear_bit(IDT77252_BIT_INIT, &card->flags);
3174         DIPRINTK("%s: Card deinitialized.\n", card->name);
3175 }
3176
3177
3178 static int __devinit
3179 init_sram(struct idt77252_dev *card)
3180 {
3181         int i;
3182
3183         for (i = 0; i < card->sramsize; i += 4)
3184                 write_sram(card, (i >> 2), 0);
3185
3186         /* set SRAM layout for THIS card */
3187         if (card->sramsize == (512 * 1024)) {
3188                 card->tct_base = SAR_SRAM_TCT_128_BASE;
3189                 card->tct_size = (SAR_SRAM_TCT_128_TOP - card->tct_base + 1)
3190                     / SAR_SRAM_TCT_SIZE;
3191                 card->rct_base = SAR_SRAM_RCT_128_BASE;
3192                 card->rct_size = (SAR_SRAM_RCT_128_TOP - card->rct_base + 1)
3193                     / SAR_SRAM_RCT_SIZE;
3194                 card->rt_base = SAR_SRAM_RT_128_BASE;
3195                 card->scd_base = SAR_SRAM_SCD_128_BASE;
3196                 card->scd_size = (SAR_SRAM_SCD_128_TOP - card->scd_base + 1)
3197                     / SAR_SRAM_SCD_SIZE;
3198                 card->tst[0] = SAR_SRAM_TST1_128_BASE;
3199                 card->tst[1] = SAR_SRAM_TST2_128_BASE;
3200                 card->tst_size = SAR_SRAM_TST1_128_TOP - card->tst[0] + 1;
3201                 card->abrst_base = SAR_SRAM_ABRSTD_128_BASE;
3202                 card->abrst_size = SAR_ABRSTD_SIZE_8K;
3203                 card->fifo_base = SAR_SRAM_FIFO_128_BASE;
3204                 card->fifo_size = SAR_RXFD_SIZE_32K;
3205         } else {
3206                 card->tct_base = SAR_SRAM_TCT_32_BASE;
3207                 card->tct_size = (SAR_SRAM_TCT_32_TOP - card->tct_base + 1)
3208                     / SAR_SRAM_TCT_SIZE;
3209                 card->rct_base = SAR_SRAM_RCT_32_BASE;
3210                 card->rct_size = (SAR_SRAM_RCT_32_TOP - card->rct_base + 1)
3211                     / SAR_SRAM_RCT_SIZE;
3212                 card->rt_base = SAR_SRAM_RT_32_BASE;
3213                 card->scd_base = SAR_SRAM_SCD_32_BASE;
3214                 card->scd_size = (SAR_SRAM_SCD_32_TOP - card->scd_base + 1)
3215                     / SAR_SRAM_SCD_SIZE;
3216                 card->tst[0] = SAR_SRAM_TST1_32_BASE;
3217                 card->tst[1] = SAR_SRAM_TST2_32_BASE;
3218                 card->tst_size = (SAR_SRAM_TST1_32_TOP - card->tst[0] + 1);
3219                 card->abrst_base = SAR_SRAM_ABRSTD_32_BASE;
3220                 card->abrst_size = SAR_ABRSTD_SIZE_1K;
3221                 card->fifo_base = SAR_SRAM_FIFO_32_BASE;
3222                 card->fifo_size = SAR_RXFD_SIZE_4K;
3223         }
3224
3225         /* Initialize TCT */
3226         for (i = 0; i < card->tct_size; i++) {
3227                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 0, 0);
3228                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 1, 0);
3229                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 2, 0);
3230                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 3, 0);
3231                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 4, 0);
3232                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 5, 0);
3233                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 6, 0);
3234                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 7, 0);
3235         }
3236
3237         /* Initialize RCT */
3238         for (i = 0; i < card->rct_size; i++) {
3239                 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE,
3240                                     (u32) SAR_RCTE_RAWCELLINTEN);
3241                 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 1,
3242                                     (u32) 0);
3243                 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 2,
3244                                     (u32) 0);
3245                 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 3,
3246                                     (u32) 0xffffffff);
3247         }
3248
3249         writel((SAR_FBQ0_LOW << 28) | 0x00000000 | 0x00000000 |
3250                (SAR_FB_SIZE_0 / 48), SAR_REG_FBQS0);
3251         writel((SAR_FBQ1_LOW << 28) | 0x00000000 | 0x00000000 |
3252                (SAR_FB_SIZE_1 / 48), SAR_REG_FBQS1);
3253         writel((SAR_FBQ2_LOW << 28) | 0x00000000 | 0x00000000 |
3254                (SAR_FB_SIZE_2 / 48), SAR_REG_FBQS2);
3255         writel((SAR_FBQ3_LOW << 28) | 0x00000000 | 0x00000000 |
3256                (SAR_FB_SIZE_3 / 48), SAR_REG_FBQS3);
3257
3258         /* Initialize rate table  */
3259         for (i = 0; i < 256; i++) {
3260                 write_sram(card, card->rt_base + i, log_to_rate[i]);
3261         }
3262
3263         for (i = 0; i < 128; i++) {
3264                 unsigned int tmp;
3265
3266                 tmp  = rate_to_log[(i << 2) + 0] << 0;
3267                 tmp |= rate_to_log[(i << 2) + 1] << 8;
3268                 tmp |= rate_to_log[(i << 2) + 2] << 16;
3269                 tmp |= rate_to_log[(i << 2) + 3] << 24;
3270                 write_sram(card, card->rt_base + 256 + i, tmp);
3271         }
3272
3273 #if 0 /* Fill RDF and AIR tables. */
3274         for (i = 0; i < 128; i++) {
3275                 unsigned int tmp;
3276
3277                 tmp = RDF[0][(i << 1) + 0] << 16;
3278                 tmp |= RDF[0][(i << 1) + 1] << 0;
3279                 write_sram(card, card->rt_base + 512 + i, tmp);
3280         }
3281
3282         for (i = 0; i < 128; i++) {
3283                 unsigned int tmp;
3284
3285                 tmp = AIR[0][(i << 1) + 0] << 16;
3286                 tmp |= AIR[0][(i << 1) + 1] << 0;
3287                 write_sram(card, card->rt_base + 640 + i, tmp);
3288         }
3289 #endif
3290
3291         IPRINTK("%s: initialize rate table ...\n", card->name);
3292         writel(card->rt_base << 2, SAR_REG_RTBL);
3293
3294         /* Initialize TSTs */
3295         IPRINTK("%s: initialize TST ...\n", card->name);
3296         card->tst_free = card->tst_size - 2;    /* last two are jumps */
3297
3298         for (i = card->tst[0]; i < card->tst[0] + card->tst_size - 2; i++)
3299                 write_sram(card, i, TSTE_OPC_VAR);
3300         write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
3301         idt77252_sram_write_errors = 1;
3302         write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
3303         idt77252_sram_write_errors = 0;
3304         for (i = card->tst[1]; i < card->tst[1] + card->tst_size - 2; i++)
3305                 write_sram(card, i, TSTE_OPC_VAR);
3306         write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
3307         idt77252_sram_write_errors = 1;
3308         write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
3309         idt77252_sram_write_errors = 0;
3310
3311         card->tst_index = 0;
3312         writel(card->tst[0] << 2, SAR_REG_TSTB);
3313
3314         /* Initialize ABRSTD and Receive FIFO */
3315         IPRINTK("%s: initialize ABRSTD ...\n", card->name);
3316         writel(card->abrst_size | (card->abrst_base << 2),
3317                SAR_REG_ABRSTD);
3318
3319         IPRINTK("%s: initialize receive fifo ...\n", card->name);
3320         writel(card->fifo_size | (card->fifo_base << 2),
3321                SAR_REG_RXFD);
3322
3323         IPRINTK("%s: SRAM initialization complete.\n", card->name);
3324         return 0;
3325 }
3326
3327 static int __devinit
3328 init_card(struct atm_dev *dev)
3329 {
3330         struct idt77252_dev *card = dev->dev_data;
3331         struct pci_dev *pcidev = card->pcidev;
3332         unsigned long tmpl, modl;
3333         unsigned int linkrate, rsvdcr;
3334         unsigned int tst_entries;
3335         struct net_device *tmp;
3336         char tname[10];
3337
3338         u32 size;
3339         u_char pci_byte;
3340         u32 conf;
3341         int i, k;
3342
3343         if (test_bit(IDT77252_BIT_INIT, &card->flags)) {
3344                 printk("Error: SAR already initialized.\n");
3345                 return -1;
3346         }
3347
3348 /*****************************************************************/
3349 /*   P C I   C O N F I G U R A T I O N                           */
3350 /*****************************************************************/
3351
3352         /* Set PCI Retry-Timeout and TRDY timeout */
3353         IPRINTK("%s: Checking PCI retries.\n", card->name);
3354         if (pci_read_config_byte(pcidev, 0x40, &pci_byte) != 0) {
3355                 printk("%s: can't read PCI retry timeout.\n", card->name);
3356                 deinit_card(card);
3357                 return -1;
3358         }
3359         if (pci_byte != 0) {
3360                 IPRINTK("%s: PCI retry timeout: %d, set to 0.\n",
3361                         card->name, pci_byte);
3362                 if (pci_write_config_byte(pcidev, 0x40, 0) != 0) {
3363                         printk("%s: can't set PCI retry timeout.\n",
3364                                card->name);
3365                         deinit_card(card);
3366                         return -1;
3367                 }
3368         }
3369         IPRINTK("%s: Checking PCI TRDY.\n", card->name);
3370         if (pci_read_config_byte(pcidev, 0x41, &pci_byte) != 0) {
3371                 printk("%s: can't read PCI TRDY timeout.\n", card->name);
3372                 deinit_card(card);
3373                 return -1;
3374         }
3375         if (pci_byte != 0) {
3376                 IPRINTK("%s: PCI TRDY timeout: %d, set to 0.\n",
3377                         card->name, pci_byte);
3378                 if (pci_write_config_byte(pcidev, 0x41, 0) != 0) {
3379                         printk("%s: can't set PCI TRDY timeout.\n", card->name);
3380                         deinit_card(card);
3381                         return -1;
3382                 }
3383         }
3384         /* Reset Timer register */
3385         if (readl(SAR_REG_STAT) & SAR_STAT_TMROF) {
3386                 printk("%s: resetting timer overflow.\n", card->name);
3387                 writel(SAR_STAT_TMROF, SAR_REG_STAT);
3388         }
3389         IPRINTK("%s: Request IRQ ... ", card->name);
3390         if (request_irq(pcidev->irq, idt77252_interrupt, SA_INTERRUPT|SA_SHIRQ,
3391                         card->name, card) != 0) {
3392                 printk("%s: can't allocate IRQ.\n", card->name);
3393                 deinit_card(card);
3394                 return -1;
3395         }
3396         IPRINTK("got %d.\n", pcidev->irq);
3397
3398 /*****************************************************************/
3399 /*   C H E C K   A N D   I N I T   S R A M                       */
3400 /*****************************************************************/
3401
3402         IPRINTK("%s: Initializing SRAM\n", card->name);
3403
3404         /* preset size of connecton table, so that init_sram() knows about it */
3405         conf =  SAR_CFG_TX_FIFO_SIZE_9 |        /* Use maximum fifo size */
3406                 SAR_CFG_RXSTQ_SIZE_8k |         /* Receive Status Queue is 8k */
3407                 SAR_CFG_IDLE_CLP |              /* Set CLP on idle cells */
3408 #ifndef CONFIG_ATM_IDT77252_SEND_IDLE
3409                 SAR_CFG_NO_IDLE |               /* Do not send idle cells */
3410 #endif
3411                 0;
3412
3413         if (card->sramsize == (512 * 1024))
3414                 conf |= SAR_CFG_CNTBL_1k;
3415         else
3416                 conf |= SAR_CFG_CNTBL_512;
3417
3418         switch (vpibits) {
3419         case 0:
3420                 conf |= SAR_CFG_VPVCS_0;
3421                 break;
3422         default:
3423         case 1:
3424                 conf |= SAR_CFG_VPVCS_1;
3425                 break;
3426         case 2:
3427                 conf |= SAR_CFG_VPVCS_2;
3428                 break;
3429         case 8:
3430                 conf |= SAR_CFG_VPVCS_8;
3431                 break;
3432         }
3433
3434         writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
3435
3436         if (init_sram(card) < 0)
3437                 return -1;
3438
3439 /********************************************************************/
3440 /*  A L L O C   R A M   A N D   S E T   V A R I O U S   T H I N G S */
3441 /********************************************************************/
3442         /* Initialize TSQ */
3443         if (0 != init_tsq(card)) {
3444                 deinit_card(card);
3445                 return -1;
3446         }
3447         /* Initialize RSQ */
3448         if (0 != init_rsq(card)) {
3449                 deinit_card(card);
3450                 return -1;
3451         }
3452
3453         card->vpibits = vpibits;
3454         if (card->sramsize == (512 * 1024)) {
3455                 card->vcibits = 10 - card->vpibits;
3456         } else {
3457                 card->vcibits = 9 - card->vpibits;
3458         }
3459
3460         card->vcimask = 0;
3461         for (k = 0, i = 1; k < card->vcibits; k++) {
3462                 card->vcimask |= i;
3463                 i <<= 1;
3464         }
3465
3466         IPRINTK("%s: Setting VPI/VCI mask to zero.\n", card->name);
3467         writel(0, SAR_REG_VPM);
3468
3469         /* Little Endian Order   */
3470         writel(0, SAR_REG_GP);
3471
3472         /* Initialize RAW Cell Handle Register  */
3473         card->raw_cell_hnd = pci_alloc_consistent(card->pcidev, 2 * sizeof(u32),
3474                                                   &card->raw_cell_paddr);
3475         if (!card->raw_cell_hnd) {
3476                 printk("%s: memory allocation failure.\n", card->name);
3477                 deinit_card(card);
3478                 return -1;
3479         }
3480         memset(card->raw_cell_hnd, 0, 2 * sizeof(u32));
3481         writel(card->raw_cell_paddr, SAR_REG_RAWHND);
3482         IPRINTK("%s: raw cell handle is at 0x%p.\n", card->name,
3483                 card->raw_cell_hnd);
3484
3485         size = sizeof(struct vc_map *) * card->tct_size;
3486         IPRINTK("%s: allocate %d byte for VC map.\n", card->name, size);
3487         if (NULL == (card->vcs = vmalloc(size))) {
3488                 printk("%s: memory allocation failure.\n", card->name);
3489                 deinit_card(card);
3490                 return -1;
3491         }
3492         memset(card->vcs, 0, size);
3493
3494         size = sizeof(struct vc_map *) * card->scd_size;
3495         IPRINTK("%s: allocate %d byte for SCD to VC mapping.\n",
3496                 card->name, size);
3497         if (NULL == (card->scd2vc = vmalloc(size))) {
3498                 printk("%s: memory allocation failure.\n", card->name);
3499                 deinit_card(card);
3500                 return -1;
3501         }
3502         memset(card->scd2vc, 0, size);
3503
3504         size = sizeof(struct tst_info) * (card->tst_size - 2);
3505         IPRINTK("%s: allocate %d byte for TST to VC mapping.\n",
3506                 card->name, size);
3507         if (NULL == (card->soft_tst = vmalloc(size))) {
3508                 printk("%s: memory allocation failure.\n", card->name);
3509                 deinit_card(card);
3510                 return -1;
3511         }
3512         for (i = 0; i < card->tst_size - 2; i++) {
3513                 card->soft_tst[i].tste = TSTE_OPC_VAR;
3514                 card->soft_tst[i].vc = NULL;
3515         }
3516
3517         if (dev->phy == NULL) {
3518                 printk("%s: No LT device defined.\n", card->name);
3519                 deinit_card(card);
3520                 return -1;
3521         }
3522         if (dev->phy->ioctl == NULL) {
3523                 printk("%s: LT had no IOCTL funtion defined.\n", card->name);
3524                 deinit_card(card);
3525                 return -1;
3526         }
3527
3528 #ifdef  CONFIG_ATM_IDT77252_USE_SUNI
3529         /*
3530          * this is a jhs hack to get around special functionality in the
3531          * phy driver for the atecom hardware; the functionality doesn't
3532          * exist in the linux atm suni driver
3533          *
3534          * it isn't the right way to do things, but as the guy from NIST
3535          * said, talking about their measurement of the fine structure
3536          * constant, "it's good enough for government work."
3537          */
3538         linkrate = 149760000;
3539 #endif
3540
3541         card->link_pcr = (linkrate / 8 / 53);
3542         printk("%s: Linkrate on ATM line : %u bit/s, %u cell/s.\n",
3543                card->name, linkrate, card->link_pcr);
3544
3545 #ifdef CONFIG_ATM_IDT77252_SEND_IDLE
3546         card->utopia_pcr = card->link_pcr;
3547 #else
3548         card->utopia_pcr = (160000000 / 8 / 54);
3549 #endif
3550
3551         rsvdcr = 0;
3552         if (card->utopia_pcr > card->link_pcr)
3553                 rsvdcr = card->utopia_pcr - card->link_pcr;
3554
3555         tmpl = (unsigned long) rsvdcr * ((unsigned long) card->tst_size - 2);
3556         modl = tmpl % (unsigned long)card->utopia_pcr;
3557         tst_entries = (int) (tmpl / (unsigned long)card->utopia_pcr);
3558         if (modl)
3559                 tst_entries++;
3560         card->tst_free -= tst_entries;
3561         fill_tst(card, NULL, tst_entries, TSTE_OPC_NULL);
3562
3563 #ifdef HAVE_EEPROM
3564         idt77252_eeprom_init(card);
3565         printk("%s: EEPROM: %02x:", card->name,
3566                 idt77252_eeprom_read_status(card));
3567
3568         for (i = 0; i < 0x80; i++) {
3569                 printk(" %02x", 
3570                 idt77252_eeprom_read_byte(card, i)
3571                 );
3572         }
3573         printk("\n");
3574 #endif /* HAVE_EEPROM */
3575
3576         /*
3577          * XXX: <hack>
3578          */
3579         sprintf(tname, "eth%d", card->index);
3580         tmp = dev_get_by_name(tname);   /* jhs: was "tmp = dev_get(tname);" */
3581         if (tmp) {
3582                 memcpy(card->atmdev->esi, tmp->dev_addr, 6);
3583
3584                 printk("%s: ESI %02x:%02x:%02x:%02x:%02x:%02x\n",
3585                        card->name, card->atmdev->esi[0], card->atmdev->esi[1],
3586                        card->atmdev->esi[2], card->atmdev->esi[3],
3587                        card->atmdev->esi[4], card->atmdev->esi[5]);
3588         }
3589         /*
3590          * XXX: </hack>
3591          */
3592
3593         /* Set Maximum Deficit Count for now. */
3594         writel(0xffff, SAR_REG_MDFCT);
3595
3596         set_bit(IDT77252_BIT_INIT, &card->flags);
3597
3598         XPRINTK("%s: IDT77252 ABR SAR initialization complete.\n", card->name);
3599         return 0;
3600 }
3601
3602
3603 /*****************************************************************************/
3604 /*                                                                           */
3605 /* Probing of IDT77252 ABR SAR                                               */
3606 /*                                                                           */
3607 /*****************************************************************************/
3608
3609
3610 static int __devinit
3611 idt77252_preset(struct idt77252_dev *card)
3612 {
3613         u16 pci_command;
3614
3615 /*****************************************************************/
3616 /*   P C I   C O N F I G U R A T I O N                           */
3617 /*****************************************************************/
3618
3619         XPRINTK("%s: Enable PCI master and memory access for SAR.\n",
3620                 card->name);
3621         if (pci_read_config_word(card->pcidev, PCI_COMMAND, &pci_command)) {
3622                 printk("%s: can't read PCI_COMMAND.\n", card->name);
3623                 deinit_card(card);
3624                 return -1;
3625         }
3626         if (!(pci_command & PCI_COMMAND_IO)) {
3627                 printk("%s: PCI_COMMAND: %04x (???)\n",
3628                        card->name, pci_command);
3629                 deinit_card(card);
3630                 return (-1);
3631         }
3632         pci_command |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
3633         if (pci_write_config_word(card->pcidev, PCI_COMMAND, pci_command)) {
3634                 printk("%s: can't write PCI_COMMAND.\n", card->name);
3635                 deinit_card(card);
3636                 return -1;
3637         }
3638 /*****************************************************************/
3639 /*   G E N E R I C   R E S E T                                   */
3640 /*****************************************************************/
3641
3642         /* Software reset */
3643         writel(SAR_CFG_SWRST, SAR_REG_CFG);
3644         mdelay(1);
3645         writel(0, SAR_REG_CFG);
3646
3647         IPRINTK("%s: Software resetted.\n", card->name);
3648         return 0;
3649 }
3650
3651
3652 static unsigned long __devinit
3653 probe_sram(struct idt77252_dev *card)
3654 {
3655         u32 data, addr;
3656
3657         writel(0, SAR_REG_DR0);
3658         writel(SAR_CMD_WRITE_SRAM | (0 << 2), SAR_REG_CMD);
3659
3660         for (addr = 0x4000; addr < 0x80000; addr += 0x4000) {
3661                 writel(0xdeadbeef, SAR_REG_DR0);
3662                 writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD);
3663
3664                 writel(SAR_CMD_READ_SRAM | (0 << 2), SAR_REG_CMD);
3665                 data = readl(SAR_REG_DR0);
3666
3667                 if (data != 0)
3668                         break;
3669         }
3670
3671         return addr * sizeof(u32);
3672 }
3673
3674 static int __devinit
3675 idt77252_init_one(struct pci_dev *pcidev, const struct pci_device_id *id)
3676 {
3677         static struct idt77252_dev **last = &idt77252_chain;
3678         static int index = 0;
3679
3680         unsigned long membase, srambase;
3681         struct idt77252_dev *card;
3682         struct atm_dev *dev;
3683         ushort revision = 0;
3684         int i, err;
3685
3686
3687         if ((err = pci_enable_device(pcidev))) {
3688                 printk("idt77252: can't enable PCI device at %s\n", pci_name(pcidev));
3689                 return err;
3690         }
3691
3692         if (pci_read_config_word(pcidev, PCI_REVISION_ID, &revision)) {
3693                 printk("idt77252-%d: can't read PCI_REVISION_ID\n", index);
3694                 err = -ENODEV;
3695                 goto err_out_disable_pdev;
3696         }
3697
3698         card = kmalloc(sizeof(struct idt77252_dev), GFP_KERNEL);
3699         if (!card) {
3700                 printk("idt77252-%d: can't allocate private data\n", index);
3701                 err = -ENOMEM;
3702                 goto err_out_disable_pdev;
3703         }
3704         memset(card, 0, sizeof(struct idt77252_dev));
3705
3706         card->revision = revision;
3707         card->index = index;
3708         card->pcidev = pcidev;
3709         sprintf(card->name, "idt77252-%d", card->index);
3710
3711         INIT_WORK(&card->tqueue, idt77252_softint, (void *)card);
3712
3713         membase = pci_resource_start(pcidev, 1);
3714         srambase = pci_resource_start(pcidev, 2);
3715
3716         init_MUTEX(&card->mutex);
3717         spin_lock_init(&card->cmd_lock);
3718         spin_lock_init(&card->tst_lock);
3719
3720         init_timer(&card->tst_timer);
3721         card->tst_timer.data = (unsigned long)card;
3722         card->tst_timer.function = tst_timer;
3723
3724         /* Do the I/O remapping... */
3725         card->membase = ioremap(membase, 1024);
3726         if (!card->membase) {
3727                 printk("%s: can't ioremap() membase\n", card->name);
3728                 err = -EIO;
3729                 goto err_out_free_card;
3730         }
3731
3732         if (idt77252_preset(card)) {
3733                 printk("%s: preset failed\n", card->name);
3734                 err = -EIO;
3735                 goto err_out_iounmap;
3736         }
3737
3738         dev = atm_dev_register("idt77252", &idt77252_ops, -1, NULL);
3739         if (!dev) {
3740                 printk("%s: can't register atm device\n", card->name);
3741                 err = -EIO;
3742                 goto err_out_iounmap;
3743         }
3744         dev->dev_data = card;
3745         card->atmdev = dev;
3746
3747 #ifdef  CONFIG_ATM_IDT77252_USE_SUNI
3748         suni_init(dev);
3749         if (!dev->phy) {
3750                 printk("%s: can't init SUNI\n", card->name);
3751                 err = -EIO;
3752                 goto err_out_deinit_card;
3753         }
3754 #endif  /* CONFIG_ATM_IDT77252_USE_SUNI */
3755
3756         card->sramsize = probe_sram(card);
3757
3758         for (i = 0; i < 4; i++) {
3759                 card->fbq[i] = ioremap(srambase | 0x200000 | (i << 18), 4);
3760                 if (!card->fbq[i]) {
3761                         printk("%s: can't ioremap() FBQ%d\n", card->name, i);
3762                         err = -EIO;
3763                         goto err_out_deinit_card;
3764                 }
3765         }
3766
3767         printk("%s: ABR SAR (Rev %c): MEM %08lx SRAM %08lx [%u KB]\n",
3768                card->name, ((revision > 1) && (revision < 25)) ?
3769                'A' + revision - 1 : '?', membase, srambase,
3770                card->sramsize / 1024);
3771
3772         if (init_card(dev)) {
3773                 printk("%s: init_card failed\n", card->name);
3774                 err = -EIO;
3775                 goto err_out_deinit_card;
3776         }
3777
3778         dev->ci_range.vpi_bits = card->vpibits;
3779         dev->ci_range.vci_bits = card->vcibits;
3780         dev->link_rate = card->link_pcr;
3781
3782         if (dev->phy->start)
3783                 dev->phy->start(dev);
3784
3785         if (idt77252_dev_open(card)) {
3786                 printk("%s: dev_open failed\n", card->name);
3787                 err = -EIO;
3788                 goto err_out_stop;
3789         }
3790
3791         *last = card;
3792         last = &card->next;
3793         index++;
3794
3795         return 0;
3796
3797 err_out_stop:
3798         if (dev->phy->stop)
3799                 dev->phy->stop(dev);
3800
3801 err_out_deinit_card:
3802         deinit_card(card);
3803
3804 err_out_iounmap:
3805         iounmap(card->membase);
3806
3807 err_out_free_card:
3808         kfree(card);
3809
3810 err_out_disable_pdev:
3811         pci_disable_device(pcidev);
3812         return err;
3813 }
3814
3815 static struct pci_device_id idt77252_pci_tbl[] =
3816 {
3817         { PCI_VENDOR_ID_IDT, PCI_DEVICE_ID_IDT_IDT77252,
3818           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
3819         { 0, }
3820 };
3821
3822 MODULE_DEVICE_TABLE(pci, idt77252_pci_tbl);
3823
3824 static struct pci_driver idt77252_driver = {
3825         .name           = "idt77252",
3826         .id_table       = idt77252_pci_tbl,
3827         .probe          = idt77252_init_one,
3828 };
3829
3830 static int __init idt77252_init(void)
3831 {
3832         struct sk_buff *skb;
3833
3834         printk("%s: at %p\n", __FUNCTION__, idt77252_init);
3835
3836         if (sizeof(skb->cb) < sizeof(struct atm_skb_data) +
3837                               sizeof(struct idt77252_skb_prv)) {
3838                 printk(KERN_ERR "%s: skb->cb is too small (%lu < %lu)\n",
3839                        __FUNCTION__, (unsigned long) sizeof(skb->cb),
3840                        (unsigned long) sizeof(struct atm_skb_data) +
3841                                        sizeof(struct idt77252_skb_prv));
3842                 return -EIO;
3843         }
3844
3845         return pci_register_driver(&idt77252_driver);
3846 }
3847
3848 static void __exit idt77252_exit(void)
3849 {
3850         struct idt77252_dev *card;
3851         struct atm_dev *dev;
3852
3853         pci_unregister_driver(&idt77252_driver);
3854
3855         while (idt77252_chain) {
3856                 card = idt77252_chain;
3857                 dev = card->atmdev;
3858                 idt77252_chain = card->next;
3859
3860                 if (dev->phy->stop)
3861                         dev->phy->stop(dev);
3862                 deinit_card(card);
3863                 pci_disable_device(card->pcidev);
3864                 kfree(card);
3865         }
3866
3867         DIPRINTK("idt77252: finished cleanup-module().\n");
3868 }
3869
3870 module_init(idt77252_init);
3871 module_exit(idt77252_exit);
3872
3873 MODULE_LICENSE("GPL");
3874
3875 module_param(vpibits, uint, 0);
3876 MODULE_PARM_DESC(vpibits, "number of VPI bits supported (0, 1, or 2)");
3877 #ifdef CONFIG_ATM_IDT77252_DEBUG
3878 module_param(debug, ulong, 0644);
3879 MODULE_PARM_DESC(debug,   "debug bitmap, see drivers/atm/idt77252.h");
3880 #endif
3881
3882 MODULE_AUTHOR("Eddie C. Dost <ecd@atecom.com>");
3883 MODULE_DESCRIPTION("IDT77252 ABR SAR Driver");