ipwireless: switch to ->[sg]et_serial()
[muen/linux.git] / drivers / tty / isicom.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  *      Original driver code supplied by Multi-Tech
4  *
5  *      Changes
6  *      1/9/98  alan@lxorguk.ukuu.org.uk
7  *                                      Merge to 2.0.x kernel tree
8  *                                      Obtain and use official major/minors
9  *                                      Loader switched to a misc device
10  *                                      (fixed range check bug as a side effect)
11  *                                      Printk clean up
12  *      9/12/98 alan@lxorguk.ukuu.org.uk
13  *                                      Rough port to 2.1.x
14  *
15  *      10/6/99 sameer                  Merged the ISA and PCI drivers to
16  *                                      a new unified driver.
17  *
18  *      3/9/99  sameer                  Added support for ISI4616 cards.
19  *
20  *      16/9/99 sameer                  We do not force RTS low anymore.
21  *                                      This is to prevent the firmware
22  *                                      from getting confused.
23  *
24  *      26/10/99 sameer                 Cosmetic changes:The driver now
25  *                                      dumps the Port Count information
26  *                                      along with I/O address and IRQ.
27  *
28  *      13/12/99 sameer                 Fixed the problem with IRQ sharing.
29  *
30  *      10/5/00  sameer                 Fixed isicom_shutdown_board()
31  *                                      to not lower DTR on all the ports
32  *                                      when the last port on the card is
33  *                                      closed.
34  *
35  *      10/5/00  sameer                 Signal mask setup command added
36  *                                      to  isicom_setup_port and
37  *                                      isicom_shutdown_port.
38  *
39  *      24/5/00  sameer                 The driver is now SMP aware.
40  *
41  *
42  *      27/11/00 Vinayak P Risbud       Fixed the Driver Crash Problem
43  *
44  *
45  *      03/01/01  anil .s               Added support for resetting the
46  *                                      internal modems on ISI cards.
47  *
48  *      08/02/01  anil .s               Upgraded the driver for kernel
49  *                                      2.4.x
50  *
51  *      11/04/01  Kevin                 Fixed firmware load problem with
52  *                                      ISIHP-4X card
53  *
54  *      30/04/01  anil .s               Fixed the remote login through
55  *                                      ISI port problem. Now the link
56  *                                      does not go down before password
57  *                                      prompt.
58  *
59  *      03/05/01  anil .s               Fixed the problem with IRQ sharing
60  *                                      among ISI-PCI cards.
61  *
62  *      03/05/01  anil .s               Added support to display the version
63  *                                      info during insmod as well as module
64  *                                      listing by lsmod.
65  *
66  *      10/05/01  anil .s               Done the modifications to the source
67  *                                      file and Install script so that the
68  *                                      same installation can be used for
69  *                                      2.2.x and 2.4.x kernel.
70  *
71  *      06/06/01  anil .s               Now we drop both dtr and rts during
72  *                                      shutdown_port as well as raise them
73  *                                      during isicom_config_port.
74  *
75  *      09/06/01 acme@conectiva.com.br  use capable, not suser, do
76  *                                      restore_flags on failure in
77  *                                      isicom_send_break, verify put_user
78  *                                      result
79  *
80  *      11/02/03  ranjeeth              Added support for 230 Kbps and 460 Kbps
81  *                                      Baud index extended to 21
82  *
83  *      20/03/03  ranjeeth              Made to work for Linux Advanced server.
84  *                                      Taken care of license warning.
85  *
86  *      10/12/03  Ravindra              Made to work for Fedora Core 1 of
87  *                                      Red Hat Distribution
88  *
89  *      06/01/05  Alan Cox              Merged the ISI and base kernel strands
90  *                                      into a single 2.6 driver
91  *
92  *      ***********************************************************
93  *
94  *      To use this driver you also need the support package. You
95  *      can find this in RPM format on
96  *              ftp://ftp.linux.org.uk/pub/linux/alan
97  *
98  *      You can find the original tools for this direct from Multitech
99  *              ftp://ftp.multitech.com/ISI-Cards/
100  *
101  *      Having installed the cards the module options (/etc/modprobe.d/)
102  *
103  *      options isicom   io=card1,card2,card3,card4 irq=card1,card2,card3,card4
104  *
105  *      Omit those entries for boards you don't have installed.
106  *
107  *      TODO
108  *              Merge testing
109  *              64-bit verification
110  */
111
112 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
113
114 #include <linux/module.h>
115 #include <linux/firmware.h>
116 #include <linux/kernel.h>
117 #include <linux/tty.h>
118 #include <linux/tty_flip.h>
119 #include <linux/termios.h>
120 #include <linux/fs.h>
121 #include <linux/sched.h>
122 #include <linux/serial.h>
123 #include <linux/mm.h>
124 #include <linux/interrupt.h>
125 #include <linux/timer.h>
126 #include <linux/delay.h>
127 #include <linux/ioport.h>
128 #include <linux/slab.h>
129
130 #include <linux/uaccess.h>
131 #include <linux/io.h>
132
133 #include <linux/pci.h>
134
135 #include <linux/isicom.h>
136
137 #define InterruptTheCard(base) outw(0, (base) + 0xc)
138 #define ClearInterrupt(base) inw((base) + 0x0a)
139
140 #ifdef DEBUG
141 #define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c))
142 #else
143 #define isicom_paranoia_check(a, b, c) 0
144 #endif
145
146 static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
147 static void isicom_remove(struct pci_dev *);
148
149 static const struct pci_device_id isicom_pci_tbl[] = {
150         { PCI_DEVICE(VENDOR_ID, 0x2028) },
151         { PCI_DEVICE(VENDOR_ID, 0x2051) },
152         { PCI_DEVICE(VENDOR_ID, 0x2052) },
153         { PCI_DEVICE(VENDOR_ID, 0x2053) },
154         { PCI_DEVICE(VENDOR_ID, 0x2054) },
155         { PCI_DEVICE(VENDOR_ID, 0x2055) },
156         { PCI_DEVICE(VENDOR_ID, 0x2056) },
157         { PCI_DEVICE(VENDOR_ID, 0x2057) },
158         { PCI_DEVICE(VENDOR_ID, 0x2058) },
159         { 0 }
160 };
161 MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
162
163 static struct pci_driver isicom_driver = {
164         .name           = "isicom",
165         .id_table       = isicom_pci_tbl,
166         .probe          = isicom_probe,
167         .remove         = isicom_remove
168 };
169
170 static int prev_card = 3;       /*      start servicing isi_card[0]     */
171 static struct tty_driver *isicom_normal;
172
173 static void isicom_tx(struct timer_list *unused);
174 static void isicom_start(struct tty_struct *tty);
175
176 static DEFINE_TIMER(tx, isicom_tx);
177
178 /*   baud index mappings from linux defns to isi */
179
180 static signed char linuxb_to_isib[] = {
181         -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19, 20, 21
182 };
183
184 struct  isi_board {
185         unsigned long           base;
186         int                     irq;
187         unsigned char           port_count;
188         unsigned short          status;
189         unsigned short          port_status; /* each bit for each port */
190         unsigned short          shift_count;
191         struct isi_port         *ports;
192         signed char             count;
193         spinlock_t              card_lock; /* Card wide lock 11/5/00 -sameer */
194         unsigned long           flags;
195         unsigned int            index;
196 };
197
198 struct  isi_port {
199         unsigned short          magic;
200         struct tty_port         port;
201         u16                     channel;
202         u16                     status;
203         struct isi_board        *card;
204         unsigned char           *xmit_buf;
205         int                     xmit_head;
206         int                     xmit_tail;
207         int                     xmit_cnt;
208 };
209
210 static struct isi_board isi_card[BOARD_COUNT];
211 static struct isi_port  isi_ports[PORT_COUNT];
212
213 /*
214  *      Locking functions for card level locking. We need to own both
215  *      the kernel lock for the card and have the card in a position that
216  *      it wants to talk.
217  */
218
219 static int WaitTillCardIsFree(unsigned long base)
220 {
221         unsigned int count = 0;
222
223         while (!(inw(base + 0xe) & 0x1) && count++ < 100)
224                 mdelay(1);
225
226         return !(inw(base + 0xe) & 0x1);
227 }
228
229 static int lock_card(struct isi_board *card)
230 {
231         unsigned long base = card->base;
232         unsigned int retries, a;
233
234         for (retries = 0; retries < 10; retries++) {
235                 spin_lock_irqsave(&card->card_lock, card->flags);
236                 for (a = 0; a < 10; a++) {
237                         if (inw(base + 0xe) & 0x1)
238                                 return 1;
239                         udelay(10);
240                 }
241                 spin_unlock_irqrestore(&card->card_lock, card->flags);
242                 msleep(10);
243         }
244         pr_warn("Failed to lock Card (0x%lx)\n", card->base);
245
246         return 0;       /* Failed to acquire the card! */
247 }
248
249 static void unlock_card(struct isi_board *card)
250 {
251         spin_unlock_irqrestore(&card->card_lock, card->flags);
252 }
253
254 /*
255  *  ISI Card specific ops ...
256  */
257
258 /* card->lock HAS to be held */
259 static void raise_dtr(struct isi_port *port)
260 {
261         struct isi_board *card = port->card;
262         unsigned long base = card->base;
263         u16 channel = port->channel;
264
265         if (WaitTillCardIsFree(base))
266                 return;
267
268         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
269         outw(0x0504, base);
270         InterruptTheCard(base);
271         port->status |= ISI_DTR;
272 }
273
274 /* card->lock HAS to be held */
275 static void drop_dtr(struct isi_port *port)
276 {
277         struct isi_board *card = port->card;
278         unsigned long base = card->base;
279         u16 channel = port->channel;
280
281         if (WaitTillCardIsFree(base))
282                 return;
283
284         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
285         outw(0x0404, base);
286         InterruptTheCard(base);
287         port->status &= ~ISI_DTR;
288 }
289
290 /* card->lock HAS to be held */
291 static inline void raise_rts(struct isi_port *port)
292 {
293         struct isi_board *card = port->card;
294         unsigned long base = card->base;
295         u16 channel = port->channel;
296
297         if (WaitTillCardIsFree(base))
298                 return;
299
300         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
301         outw(0x0a04, base);
302         InterruptTheCard(base);
303         port->status |= ISI_RTS;
304 }
305
306 /* card->lock HAS to be held */
307 static inline void drop_rts(struct isi_port *port)
308 {
309         struct isi_board *card = port->card;
310         unsigned long base = card->base;
311         u16 channel = port->channel;
312
313         if (WaitTillCardIsFree(base))
314                 return;
315
316         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
317         outw(0x0804, base);
318         InterruptTheCard(base);
319         port->status &= ~ISI_RTS;
320 }
321
322 /* card->lock MUST NOT be held */
323
324 static void isicom_dtr_rts(struct tty_port *port, int on)
325 {
326         struct isi_port *ip = container_of(port, struct isi_port, port);
327         struct isi_board *card = ip->card;
328         unsigned long base = card->base;
329         u16 channel = ip->channel;
330
331         if (!lock_card(card))
332                 return;
333
334         if (on) {
335                 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
336                 outw(0x0f04, base);
337                 InterruptTheCard(base);
338                 ip->status |= (ISI_DTR | ISI_RTS);
339         } else {
340                 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
341                 outw(0x0C04, base);
342                 InterruptTheCard(base);
343                 ip->status &= ~(ISI_DTR | ISI_RTS);
344         }
345         unlock_card(card);
346 }
347
348 /* card->lock HAS to be held */
349 static void drop_dtr_rts(struct isi_port *port)
350 {
351         struct isi_board *card = port->card;
352         unsigned long base = card->base;
353         u16 channel = port->channel;
354
355         if (WaitTillCardIsFree(base))
356                 return;
357
358         outw(0x8000 | (channel << card->shift_count) | 0x02, base);
359         outw(0x0c04, base);
360         InterruptTheCard(base);
361         port->status &= ~(ISI_RTS | ISI_DTR);
362 }
363
364 /*
365  *      ISICOM Driver specific routines ...
366  *
367  */
368
369 static inline int __isicom_paranoia_check(struct isi_port const *port,
370         char *name, const char *routine)
371 {
372         if (!port) {
373                 pr_warn("Warning: bad isicom magic for dev %s in %s\n",
374                         name, routine);
375                 return 1;
376         }
377         if (port->magic != ISICOM_MAGIC) {
378                 pr_warn("Warning: NULL isicom port for dev %s in %s\n",
379                         name, routine);
380                 return 1;
381         }
382
383         return 0;
384 }
385
386 /*
387  *      Transmitter.
388  *
389  *      We shovel data into the card buffers on a regular basis. The card
390  *      will do the rest of the work for us.
391  */
392
393 static void isicom_tx(struct timer_list *unused)
394 {
395         unsigned long flags, base;
396         unsigned int retries;
397         short count = (BOARD_COUNT-1), card;
398         short txcount, wrd, residue, word_count, cnt;
399         struct isi_port *port;
400         struct tty_struct *tty;
401
402         /*      find next active board  */
403         card = (prev_card + 1) & 0x0003;
404         while (count-- > 0) {
405                 if (isi_card[card].status & BOARD_ACTIVE)
406                         break;
407                 card = (card + 1) & 0x0003;
408         }
409         if (!(isi_card[card].status & BOARD_ACTIVE))
410                 goto sched_again;
411
412         prev_card = card;
413
414         count = isi_card[card].port_count;
415         port = isi_card[card].ports;
416         base = isi_card[card].base;
417
418         spin_lock_irqsave(&isi_card[card].card_lock, flags);
419         for (retries = 0; retries < 100; retries++) {
420                 if (inw(base + 0xe) & 0x1)
421                         break;
422                 udelay(2);
423         }
424         if (retries >= 100)
425                 goto unlock;
426
427         tty = tty_port_tty_get(&port->port);
428         if (tty == NULL)
429                 goto put_unlock;
430
431         for (; count > 0; count--, port++) {
432                 /* port not active or tx disabled to force flow control */
433                 if (!tty_port_initialized(&port->port) ||
434                         !(port->status & ISI_TXOK))
435                         continue;
436
437                 txcount = min_t(short, TX_SIZE, port->xmit_cnt);
438                 if (txcount <= 0 || tty->stopped || tty->hw_stopped)
439                         continue;
440
441                 if (!(inw(base + 0x02) & (1 << port->channel)))
442                         continue;
443
444                 pr_debug("txing %d bytes, port%d.\n",
445                          txcount, port->channel + 1);
446                 outw((port->channel << isi_card[card].shift_count) | txcount,
447                         base);
448                 residue = NO;
449                 wrd = 0;
450                 while (1) {
451                         cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE
452                                         - port->xmit_tail));
453                         if (residue == YES) {
454                                 residue = NO;
455                                 if (cnt > 0) {
456                                         wrd |= (port->port.xmit_buf[port->xmit_tail]
457                                                                         << 8);
458                                         port->xmit_tail = (port->xmit_tail + 1)
459                                                 & (SERIAL_XMIT_SIZE - 1);
460                                         port->xmit_cnt--;
461                                         txcount--;
462                                         cnt--;
463                                         outw(wrd, base);
464                                 } else {
465                                         outw(wrd, base);
466                                         break;
467                                 }
468                         }
469                         if (cnt <= 0)
470                                 break;
471                         word_count = cnt >> 1;
472                         outsw(base, port->port.xmit_buf+port->xmit_tail, word_count);
473                         port->xmit_tail = (port->xmit_tail
474                                 + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1);
475                         txcount -= (word_count << 1);
476                         port->xmit_cnt -= (word_count << 1);
477                         if (cnt & 0x0001) {
478                                 residue = YES;
479                                 wrd = port->port.xmit_buf[port->xmit_tail];
480                                 port->xmit_tail = (port->xmit_tail + 1)
481                                         & (SERIAL_XMIT_SIZE - 1);
482                                 port->xmit_cnt--;
483                                 txcount--;
484                         }
485                 }
486
487                 InterruptTheCard(base);
488                 if (port->xmit_cnt <= 0)
489                         port->status &= ~ISI_TXOK;
490                 if (port->xmit_cnt <= WAKEUP_CHARS)
491                         tty_wakeup(tty);
492         }
493
494 put_unlock:
495         tty_kref_put(tty);
496 unlock:
497         spin_unlock_irqrestore(&isi_card[card].card_lock, flags);
498         /*      schedule another tx for hopefully in about 10ms */
499 sched_again:
500         mod_timer(&tx, jiffies + msecs_to_jiffies(10));
501 }
502
503 /*
504  *      Main interrupt handler routine
505  */
506
507 static irqreturn_t isicom_interrupt(int irq, void *dev_id)
508 {
509         struct isi_board *card = dev_id;
510         struct isi_port *port;
511         struct tty_struct *tty;
512         unsigned long base;
513         u16 header, word_count, count, channel;
514         short byte_count;
515         unsigned char *rp;
516
517         if (!card || !(card->status & FIRMWARE_LOADED))
518                 return IRQ_NONE;
519
520         base = card->base;
521
522         /* did the card interrupt us? */
523         if (!(inw(base + 0x0e) & 0x02))
524                 return IRQ_NONE;
525
526         spin_lock(&card->card_lock);
527
528         /*
529          * disable any interrupts from the PCI card and lower the
530          * interrupt line
531          */
532         outw(0x8000, base+0x04);
533         ClearInterrupt(base);
534
535         inw(base);              /* get the dummy word out */
536         header = inw(base);
537         channel = (header & 0x7800) >> card->shift_count;
538         byte_count = header & 0xff;
539
540         if (channel + 1 > card->port_count) {
541                 pr_warn("%s(0x%lx): %d(channel) > port_count\n",
542                         __func__, base, channel + 1);
543                 outw(0x0000, base+0x04); /* enable interrupts */
544                 spin_unlock(&card->card_lock);
545                 return IRQ_HANDLED;
546         }
547         port = card->ports + channel;
548         if (!tty_port_initialized(&port->port)) {
549                 outw(0x0000, base+0x04); /* enable interrupts */
550                 spin_unlock(&card->card_lock);
551                 return IRQ_HANDLED;
552         }
553
554         tty = tty_port_tty_get(&port->port);
555         if (tty == NULL) {
556                 word_count = byte_count >> 1;
557                 while (byte_count > 1) {
558                         inw(base);
559                         byte_count -= 2;
560                 }
561                 if (byte_count & 0x01)
562                         inw(base);
563                 outw(0x0000, base+0x04); /* enable interrupts */
564                 spin_unlock(&card->card_lock);
565                 return IRQ_HANDLED;
566         }
567
568         if (header & 0x8000) {          /* Status Packet */
569                 header = inw(base);
570                 switch (header & 0xff) {
571                 case 0: /* Change in EIA signals */
572                         if (tty_port_check_carrier(&port->port)) {
573                                 if (port->status & ISI_DCD) {
574                                         if (!(header & ISI_DCD)) {
575                                         /* Carrier has been lost  */
576                                                 pr_debug("%s: DCD->low.\n",
577                                                          __func__);
578                                                 port->status &= ~ISI_DCD;
579                                                 tty_hangup(tty);
580                                         }
581                                 } else if (header & ISI_DCD) {
582                                 /* Carrier has been detected */
583                                         pr_debug("%s: DCD->high.\n",
584                                                 __func__);
585                                         port->status |= ISI_DCD;
586                                         wake_up_interruptible(&port->port.open_wait);
587                                 }
588                         } else {
589                                 if (header & ISI_DCD)
590                                         port->status |= ISI_DCD;
591                                 else
592                                         port->status &= ~ISI_DCD;
593                         }
594
595                         if (tty_port_cts_enabled(&port->port)) {
596                                 if (tty->hw_stopped) {
597                                         if (header & ISI_CTS) {
598                                                 tty->hw_stopped = 0;
599                                                 /* start tx ing */
600                                                 port->status |= (ISI_TXOK
601                                                         | ISI_CTS);
602                                                 tty_wakeup(tty);
603                                         }
604                                 } else if (!(header & ISI_CTS)) {
605                                         tty->hw_stopped = 1;
606                                         /* stop tx ing */
607                                         port->status &= ~(ISI_TXOK | ISI_CTS);
608                                 }
609                         } else {
610                                 if (header & ISI_CTS)
611                                         port->status |= ISI_CTS;
612                                 else
613                                         port->status &= ~ISI_CTS;
614                         }
615
616                         if (header & ISI_DSR)
617                                 port->status |= ISI_DSR;
618                         else
619                                 port->status &= ~ISI_DSR;
620
621                         if (header & ISI_RI)
622                                 port->status |= ISI_RI;
623                         else
624                                 port->status &= ~ISI_RI;
625
626                         break;
627
628                 case 1: /* Received Break !!! */
629                         tty_insert_flip_char(&port->port, 0, TTY_BREAK);
630                         if (port->port.flags & ASYNC_SAK)
631                                 do_SAK(tty);
632                         tty_flip_buffer_push(&port->port);
633                         break;
634
635                 case 2: /* Statistics            */
636                         pr_debug("%s: stats!!!\n", __func__);
637                         break;
638
639                 default:
640                         pr_debug("%s: Unknown code in status packet.\n",
641                                  __func__);
642                         break;
643                 }
644         } else {                                /* Data   Packet */
645                 count = tty_prepare_flip_string(&port->port, &rp,
646                                 byte_count & ~1);
647                 pr_debug("%s: Can rx %d of %d bytes.\n",
648                          __func__, count, byte_count);
649                 word_count = count >> 1;
650                 insw(base, rp, word_count);
651                 byte_count -= (word_count << 1);
652                 if (count & 0x0001) {
653                         tty_insert_flip_char(&port->port, inw(base) & 0xff,
654                                 TTY_NORMAL);
655                         byte_count -= 2;
656                 }
657                 if (byte_count > 0) {
658                         pr_debug("%s(0x%lx:%d): Flip buffer overflow! dropping bytes...\n",
659                                  __func__, base, channel + 1);
660                 /* drain out unread xtra data */
661                 while (byte_count > 0) {
662                                 inw(base);
663                                 byte_count -= 2;
664                         }
665                 }
666                 tty_flip_buffer_push(&port->port);
667         }
668         outw(0x0000, base+0x04); /* enable interrupts */
669         spin_unlock(&card->card_lock);
670         tty_kref_put(tty);
671
672         return IRQ_HANDLED;
673 }
674
675 static void isicom_config_port(struct tty_struct *tty)
676 {
677         struct isi_port *port = tty->driver_data;
678         struct isi_board *card = port->card;
679         unsigned long baud;
680         unsigned long base = card->base;
681         u16 channel_setup, channel = port->channel,
682                 shift_count = card->shift_count;
683         unsigned char flow_ctrl;
684
685         /* FIXME: Switch to new tty baud API */
686         baud = C_BAUD(tty);
687         if (baud & CBAUDEX) {
688                 baud &= ~CBAUDEX;
689
690                 /*  if CBAUDEX bit is on and the baud is set to either 50 or 75
691                  *  then the card is programmed for 57.6Kbps or 115Kbps
692                  *  respectively.
693                  */
694
695                 /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */
696                 if (baud < 1 || baud > 4)
697                         tty->termios.c_cflag &= ~CBAUDEX;
698                 else
699                         baud += 15;
700         }
701         if (baud == 15) {
702
703                 /*  the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
704                  *  by the set_serial_info ioctl ... this is done by
705                  *  the 'setserial' utility.
706                  */
707
708                 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
709                         baud++; /*  57.6 Kbps */
710                 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
711                         baud += 2; /*  115  Kbps */
712                 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
713                         baud += 3; /* 230 kbps*/
714                 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
715                         baud += 4; /* 460 kbps*/
716         }
717         if (linuxb_to_isib[baud] == -1) {
718                 /* hang up */
719                 drop_dtr(port);
720                 return;
721         } else
722                 raise_dtr(port);
723
724         if (WaitTillCardIsFree(base) == 0) {
725                 outw(0x8000 | (channel << shift_count) | 0x03, base);
726                 outw(linuxb_to_isib[baud] << 8 | 0x03, base);
727                 channel_setup = 0;
728                 switch (C_CSIZE(tty)) {
729                 case CS5:
730                         channel_setup |= ISICOM_CS5;
731                         break;
732                 case CS6:
733                         channel_setup |= ISICOM_CS6;
734                         break;
735                 case CS7:
736                         channel_setup |= ISICOM_CS7;
737                         break;
738                 case CS8:
739                         channel_setup |= ISICOM_CS8;
740                         break;
741                 }
742
743                 if (C_CSTOPB(tty))
744                         channel_setup |= ISICOM_2SB;
745                 if (C_PARENB(tty)) {
746                         channel_setup |= ISICOM_EVPAR;
747                         if (C_PARODD(tty))
748                                 channel_setup |= ISICOM_ODPAR;
749                 }
750                 outw(channel_setup, base);
751                 InterruptTheCard(base);
752         }
753         tty_port_set_check_carrier(&port->port, !C_CLOCAL(tty));
754
755         /* flow control settings ...*/
756         flow_ctrl = 0;
757         tty_port_set_cts_flow(&port->port, C_CRTSCTS(tty));
758         if (C_CRTSCTS(tty))
759                 flow_ctrl |= ISICOM_CTSRTS;
760         if (I_IXON(tty))
761                 flow_ctrl |= ISICOM_RESPOND_XONXOFF;
762         if (I_IXOFF(tty))
763                 flow_ctrl |= ISICOM_INITIATE_XONXOFF;
764
765         if (WaitTillCardIsFree(base) == 0) {
766                 outw(0x8000 | (channel << shift_count) | 0x04, base);
767                 outw(flow_ctrl << 8 | 0x05, base);
768                 outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
769                 InterruptTheCard(base);
770         }
771
772         /*      rx enabled -> enable port for rx on the card    */
773         if (C_CREAD(tty)) {
774                 card->port_status |= (1 << channel);
775                 outw(card->port_status, base + 0x02);
776         }
777 }
778
779 /* open et all */
780
781 static inline void isicom_setup_board(struct isi_board *bp)
782 {
783         int channel;
784         struct isi_port *port;
785
786         bp->count++;
787         if (!(bp->status & BOARD_INIT)) {
788                 port = bp->ports;
789                 for (channel = 0; channel < bp->port_count; channel++, port++)
790                         drop_dtr_rts(port);
791         }
792         bp->status |= BOARD_ACTIVE | BOARD_INIT;
793 }
794
795 /* Activate and thus setup board are protected from races against shutdown
796    by the tty_port mutex */
797
798 static int isicom_activate(struct tty_port *tport, struct tty_struct *tty)
799 {
800         struct isi_port *port = container_of(tport, struct isi_port, port);
801         struct isi_board *card = port->card;
802         unsigned long flags;
803
804         if (tty_port_alloc_xmit_buf(tport) < 0)
805                 return -ENOMEM;
806
807         spin_lock_irqsave(&card->card_lock, flags);
808         isicom_setup_board(card);
809
810         port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
811
812         /*      discard any residual data       */
813         if (WaitTillCardIsFree(card->base) == 0) {
814                 outw(0x8000 | (port->channel << card->shift_count) | 0x02,
815                                 card->base);
816                 outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base);
817                 InterruptTheCard(card->base);
818         }
819         isicom_config_port(tty);
820         spin_unlock_irqrestore(&card->card_lock, flags);
821
822         return 0;
823 }
824
825 static int isicom_carrier_raised(struct tty_port *port)
826 {
827         struct isi_port *ip = container_of(port, struct isi_port, port);
828         return (ip->status & ISI_DCD)?1 : 0;
829 }
830
831 static struct tty_port *isicom_find_port(struct tty_struct *tty)
832 {
833         struct isi_port *port;
834         struct isi_board *card;
835         unsigned int board;
836         int line = tty->index;
837
838         board = BOARD(line);
839         card = &isi_card[board];
840
841         if (!(card->status & FIRMWARE_LOADED))
842                 return NULL;
843
844         /*  open on a port greater than the port count for the card !!! */
845         if (line > ((board * 16) + card->port_count - 1))
846                 return NULL;
847
848         port = &isi_ports[line];
849         if (isicom_paranoia_check(port, tty->name, "isicom_open"))
850                 return NULL;
851
852         return &port->port;
853 }
854
855 static int isicom_open(struct tty_struct *tty, struct file *filp)
856 {
857         struct isi_port *port;
858         struct tty_port *tport;
859
860         tport = isicom_find_port(tty);
861         if (tport == NULL)
862                 return -ENODEV;
863         port = container_of(tport, struct isi_port, port);
864
865         tty->driver_data = port;
866         return tty_port_open(tport, tty, filp);
867 }
868
869 /* close et all */
870
871 /* card->lock HAS to be held */
872 static void isicom_shutdown_port(struct isi_port *port)
873 {
874         struct isi_board *card = port->card;
875
876         if (--card->count < 0) {
877                 pr_debug("%s: bad board(0x%lx) count %d.\n",
878                          __func__, card->base, card->count);
879                 card->count = 0;
880         }
881         /* last port was closed, shutdown that board too */
882         if (!card->count)
883                 card->status &= BOARD_ACTIVE;
884 }
885
886 static void isicom_flush_buffer(struct tty_struct *tty)
887 {
888         struct isi_port *port = tty->driver_data;
889         struct isi_board *card = port->card;
890         unsigned long flags;
891
892         if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
893                 return;
894
895         spin_lock_irqsave(&card->card_lock, flags);
896         port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
897         spin_unlock_irqrestore(&card->card_lock, flags);
898
899         tty_wakeup(tty);
900 }
901
902 static void isicom_shutdown(struct tty_port *port)
903 {
904         struct isi_port *ip = container_of(port, struct isi_port, port);
905         struct isi_board *card = ip->card;
906         unsigned long flags;
907
908         /* indicate to the card that no more data can be received
909            on this port */
910         spin_lock_irqsave(&card->card_lock, flags);
911         card->port_status &= ~(1 << ip->channel);
912         outw(card->port_status, card->base + 0x02);
913         isicom_shutdown_port(ip);
914         spin_unlock_irqrestore(&card->card_lock, flags);
915         tty_port_free_xmit_buf(port);
916 }
917
918 static void isicom_close(struct tty_struct *tty, struct file *filp)
919 {
920         struct isi_port *ip = tty->driver_data;
921         struct tty_port *port;
922
923         if (ip == NULL)
924                 return;
925
926         port = &ip->port;
927         if (isicom_paranoia_check(ip, tty->name, "isicom_close"))
928                 return;
929         tty_port_close(port, tty, filp);
930 }
931
932 /* write et all */
933 static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
934         int count)
935 {
936         struct isi_port *port = tty->driver_data;
937         struct isi_board *card = port->card;
938         unsigned long flags;
939         int cnt, total = 0;
940
941         if (isicom_paranoia_check(port, tty->name, "isicom_write"))
942                 return 0;
943
944         spin_lock_irqsave(&card->card_lock, flags);
945
946         while (1) {
947                 cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt
948                                 - 1, SERIAL_XMIT_SIZE - port->xmit_head));
949                 if (cnt <= 0)
950                         break;
951
952                 memcpy(port->port.xmit_buf + port->xmit_head, buf, cnt);
953                 port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
954                         - 1);
955                 port->xmit_cnt += cnt;
956                 buf += cnt;
957                 count -= cnt;
958                 total += cnt;
959         }
960         if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
961                 port->status |= ISI_TXOK;
962         spin_unlock_irqrestore(&card->card_lock, flags);
963         return total;
964 }
965
966 /* put_char et all */
967 static int isicom_put_char(struct tty_struct *tty, unsigned char ch)
968 {
969         struct isi_port *port = tty->driver_data;
970         struct isi_board *card = port->card;
971         unsigned long flags;
972
973         if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
974                 return 0;
975
976         spin_lock_irqsave(&card->card_lock, flags);
977         if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
978                 spin_unlock_irqrestore(&card->card_lock, flags);
979                 return 0;
980         }
981
982         port->port.xmit_buf[port->xmit_head++] = ch;
983         port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
984         port->xmit_cnt++;
985         spin_unlock_irqrestore(&card->card_lock, flags);
986         return 1;
987 }
988
989 /* flush_chars et all */
990 static void isicom_flush_chars(struct tty_struct *tty)
991 {
992         struct isi_port *port = tty->driver_data;
993
994         if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
995                 return;
996
997         if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
998                         !port->port.xmit_buf)
999                 return;
1000
1001         /* this tells the transmitter to consider this port for
1002            data output to the card ... that's the best we can do. */
1003         port->status |= ISI_TXOK;
1004 }
1005
1006 /* write_room et all */
1007 static int isicom_write_room(struct tty_struct *tty)
1008 {
1009         struct isi_port *port = tty->driver_data;
1010         int free;
1011
1012         if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
1013                 return 0;
1014
1015         free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1016         if (free < 0)
1017                 free = 0;
1018         return free;
1019 }
1020
1021 /* chars_in_buffer et all */
1022 static int isicom_chars_in_buffer(struct tty_struct *tty)
1023 {
1024         struct isi_port *port = tty->driver_data;
1025         if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
1026                 return 0;
1027         return port->xmit_cnt;
1028 }
1029
1030 /* ioctl et all */
1031 static int isicom_send_break(struct tty_struct *tty, int length)
1032 {
1033         struct isi_port *port = tty->driver_data;
1034         struct isi_board *card = port->card;
1035         unsigned long base = card->base;
1036
1037         if (length == -1)
1038                 return -EOPNOTSUPP;
1039
1040         if (!lock_card(card))
1041                 return -EINVAL;
1042
1043         outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
1044         outw((length & 0xff) << 8 | 0x00, base);
1045         outw((length & 0xff00u), base);
1046         InterruptTheCard(base);
1047
1048         unlock_card(card);
1049         return 0;
1050 }
1051
1052 static int isicom_tiocmget(struct tty_struct *tty)
1053 {
1054         struct isi_port *port = tty->driver_data;
1055         /* just send the port status */
1056         u16 status = port->status;
1057
1058         if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1059                 return -ENODEV;
1060
1061         return  ((status & ISI_RTS) ? TIOCM_RTS : 0) |
1062                 ((status & ISI_DTR) ? TIOCM_DTR : 0) |
1063                 ((status & ISI_DCD) ? TIOCM_CAR : 0) |
1064                 ((status & ISI_DSR) ? TIOCM_DSR : 0) |
1065                 ((status & ISI_CTS) ? TIOCM_CTS : 0) |
1066                 ((status & ISI_RI ) ? TIOCM_RI  : 0);
1067 }
1068
1069 static int isicom_tiocmset(struct tty_struct *tty,
1070                                         unsigned int set, unsigned int clear)
1071 {
1072         struct isi_port *port = tty->driver_data;
1073         unsigned long flags;
1074
1075         if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1076                 return -ENODEV;
1077
1078         spin_lock_irqsave(&port->card->card_lock, flags);
1079         if (set & TIOCM_RTS)
1080                 raise_rts(port);
1081         if (set & TIOCM_DTR)
1082                 raise_dtr(port);
1083
1084         if (clear & TIOCM_RTS)
1085                 drop_rts(port);
1086         if (clear & TIOCM_DTR)
1087                 drop_dtr(port);
1088         spin_unlock_irqrestore(&port->card->card_lock, flags);
1089
1090         return 0;
1091 }
1092
1093 static int isicom_set_serial_info(struct tty_struct *tty,
1094                                         struct serial_struct __user *info)
1095 {
1096         struct isi_port *port = tty->driver_data;
1097         struct serial_struct newinfo;
1098         int reconfig_port;
1099
1100         if (copy_from_user(&newinfo, info, sizeof(newinfo)))
1101                 return -EFAULT;
1102
1103         mutex_lock(&port->port.mutex);
1104         reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) !=
1105                 (newinfo.flags & ASYNC_SPD_MASK));
1106
1107         if (!capable(CAP_SYS_ADMIN)) {
1108                 if ((newinfo.close_delay != port->port.close_delay) ||
1109                                 (newinfo.closing_wait != port->port.closing_wait) ||
1110                                 ((newinfo.flags & ~ASYNC_USR_MASK) !=
1111                                 (port->port.flags & ~ASYNC_USR_MASK))) {
1112                         mutex_unlock(&port->port.mutex);
1113                         return -EPERM;
1114                 }
1115                 port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
1116                                 (newinfo.flags & ASYNC_USR_MASK));
1117         } else {
1118                 port->port.close_delay = newinfo.close_delay;
1119                 port->port.closing_wait = newinfo.closing_wait;
1120                 port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) |
1121                                 (newinfo.flags & ASYNC_FLAGS));
1122         }
1123         if (reconfig_port) {
1124                 unsigned long flags;
1125                 spin_lock_irqsave(&port->card->card_lock, flags);
1126                 isicom_config_port(tty);
1127                 spin_unlock_irqrestore(&port->card->card_lock, flags);
1128         }
1129         mutex_unlock(&port->port.mutex);
1130         return 0;
1131 }
1132
1133 static int isicom_get_serial_info(struct isi_port *port,
1134         struct serial_struct __user *info)
1135 {
1136         struct serial_struct out_info;
1137
1138         mutex_lock(&port->port.mutex);
1139         memset(&out_info, 0, sizeof(out_info));
1140 /*      out_info.type = ? */
1141         out_info.line = port - isi_ports;
1142         out_info.port = port->card->base;
1143         out_info.irq = port->card->irq;
1144         out_info.flags = port->port.flags;
1145 /*      out_info.baud_base = ? */
1146         out_info.close_delay = port->port.close_delay;
1147         out_info.closing_wait = port->port.closing_wait;
1148         mutex_unlock(&port->port.mutex);
1149         if (copy_to_user(info, &out_info, sizeof(out_info)))
1150                 return -EFAULT;
1151         return 0;
1152 }
1153
1154 static int isicom_ioctl(struct tty_struct *tty,
1155         unsigned int cmd, unsigned long arg)
1156 {
1157         struct isi_port *port = tty->driver_data;
1158         void __user *argp = (void __user *)arg;
1159
1160         if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1161                 return -ENODEV;
1162
1163         switch (cmd) {
1164         case TIOCGSERIAL:
1165                 return isicom_get_serial_info(port, argp);
1166
1167         case TIOCSSERIAL:
1168                 return isicom_set_serial_info(tty, argp);
1169
1170         default:
1171                 return -ENOIOCTLCMD;
1172         }
1173         return 0;
1174 }
1175
1176 /* set_termios et all */
1177 static void isicom_set_termios(struct tty_struct *tty,
1178         struct ktermios *old_termios)
1179 {
1180         struct isi_port *port = tty->driver_data;
1181         unsigned long flags;
1182
1183         if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
1184                 return;
1185
1186         if (tty->termios.c_cflag == old_termios->c_cflag &&
1187                         tty->termios.c_iflag == old_termios->c_iflag)
1188                 return;
1189
1190         spin_lock_irqsave(&port->card->card_lock, flags);
1191         isicom_config_port(tty);
1192         spin_unlock_irqrestore(&port->card->card_lock, flags);
1193
1194         if ((old_termios->c_cflag & CRTSCTS) && !C_CRTSCTS(tty)) {
1195                 tty->hw_stopped = 0;
1196                 isicom_start(tty);
1197         }
1198 }
1199
1200 /* throttle et all */
1201 static void isicom_throttle(struct tty_struct *tty)
1202 {
1203         struct isi_port *port = tty->driver_data;
1204         struct isi_board *card = port->card;
1205
1206         if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
1207                 return;
1208
1209         /* tell the card that this port cannot handle any more data for now */
1210         card->port_status &= ~(1 << port->channel);
1211         outw(card->port_status, card->base + 0x02);
1212 }
1213
1214 /* unthrottle et all */
1215 static void isicom_unthrottle(struct tty_struct *tty)
1216 {
1217         struct isi_port *port = tty->driver_data;
1218         struct isi_board *card = port->card;
1219
1220         if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
1221                 return;
1222
1223         /* tell the card that this port is ready to accept more data */
1224         card->port_status |= (1 << port->channel);
1225         outw(card->port_status, card->base + 0x02);
1226 }
1227
1228 /* stop et all */
1229 static void isicom_stop(struct tty_struct *tty)
1230 {
1231         struct isi_port *port = tty->driver_data;
1232
1233         if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
1234                 return;
1235
1236         /* this tells the transmitter not to consider this port for
1237            data output to the card. */
1238         port->status &= ~ISI_TXOK;
1239 }
1240
1241 /* start et all */
1242 static void isicom_start(struct tty_struct *tty)
1243 {
1244         struct isi_port *port = tty->driver_data;
1245
1246         if (isicom_paranoia_check(port, tty->name, "isicom_start"))
1247                 return;
1248
1249         /* this tells the transmitter to consider this port for
1250            data output to the card. */
1251         port->status |= ISI_TXOK;
1252 }
1253
1254 static void isicom_hangup(struct tty_struct *tty)
1255 {
1256         struct isi_port *port = tty->driver_data;
1257
1258         if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
1259                 return;
1260         tty_port_hangup(&port->port);
1261 }
1262
1263
1264 /*
1265  * Driver init and deinit functions
1266  */
1267
1268 static const struct tty_operations isicom_ops = {
1269         .open                   = isicom_open,
1270         .close                  = isicom_close,
1271         .write                  = isicom_write,
1272         .put_char               = isicom_put_char,
1273         .flush_chars            = isicom_flush_chars,
1274         .write_room             = isicom_write_room,
1275         .chars_in_buffer        = isicom_chars_in_buffer,
1276         .ioctl                  = isicom_ioctl,
1277         .set_termios            = isicom_set_termios,
1278         .throttle               = isicom_throttle,
1279         .unthrottle             = isicom_unthrottle,
1280         .stop                   = isicom_stop,
1281         .start                  = isicom_start,
1282         .hangup                 = isicom_hangup,
1283         .flush_buffer           = isicom_flush_buffer,
1284         .tiocmget               = isicom_tiocmget,
1285         .tiocmset               = isicom_tiocmset,
1286         .break_ctl              = isicom_send_break,
1287 };
1288
1289 static const struct tty_port_operations isicom_port_ops = {
1290         .carrier_raised         = isicom_carrier_raised,
1291         .dtr_rts                = isicom_dtr_rts,
1292         .activate               = isicom_activate,
1293         .shutdown               = isicom_shutdown,
1294 };
1295
1296 static int reset_card(struct pci_dev *pdev,
1297         const unsigned int card, unsigned int *signature)
1298 {
1299         struct isi_board *board = pci_get_drvdata(pdev);
1300         unsigned long base = board->base;
1301         unsigned int sig, portcount = 0;
1302         int retval = 0;
1303
1304         dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1,
1305                 base);
1306
1307         inw(base + 0x8);
1308
1309         msleep(10);
1310
1311         outw(0, base + 0x8); /* Reset */
1312
1313         msleep(1000);
1314
1315         sig = inw(base + 0x4) & 0xff;
1316
1317         if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd &&
1318                         sig != 0xee) {
1319                 dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible "
1320                         "bad I/O Port Address 0x%lx).\n", card + 1, base);
1321                 dev_dbg(&pdev->dev, "Sig=0x%x\n", sig);
1322                 retval = -EIO;
1323                 goto end;
1324         }
1325
1326         msleep(10);
1327
1328         portcount = inw(base + 0x2);
1329         if (!(inw(base + 0xe) & 0x1) || (portcount != 0 && portcount != 4 &&
1330                                 portcount != 8 && portcount != 16)) {
1331                 dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.\n",
1332                         card + 1);
1333                 retval = -EIO;
1334                 goto end;
1335         }
1336
1337         switch (sig) {
1338         case 0xa5:
1339         case 0xbb:
1340         case 0xdd:
1341                 board->port_count = (portcount == 4) ? 4 : 8;
1342                 board->shift_count = 12;
1343                 break;
1344         case 0xcc:
1345         case 0xee:
1346                 board->port_count = 16;
1347                 board->shift_count = 11;
1348                 break;
1349         }
1350         dev_info(&pdev->dev, "-Done\n");
1351         *signature = sig;
1352
1353 end:
1354         return retval;
1355 }
1356
1357 static int load_firmware(struct pci_dev *pdev,
1358         const unsigned int index, const unsigned int signature)
1359 {
1360         struct isi_board *board = pci_get_drvdata(pdev);
1361         const struct firmware *fw;
1362         unsigned long base = board->base;
1363         unsigned int a;
1364         u16 word_count, status;
1365         int retval = -EIO;
1366         char *name;
1367         u8 *data;
1368
1369         struct stframe {
1370                 u16     addr;
1371                 u16     count;
1372                 u8      data[0];
1373         } *frame;
1374
1375         switch (signature) {
1376         case 0xa5:
1377                 name = "isi608.bin";
1378                 break;
1379         case 0xbb:
1380                 name = "isi608em.bin";
1381                 break;
1382         case 0xcc:
1383                 name = "isi616em.bin";
1384                 break;
1385         case 0xdd:
1386                 name = "isi4608.bin";
1387                 break;
1388         case 0xee:
1389                 name = "isi4616.bin";
1390                 break;
1391         default:
1392                 dev_err(&pdev->dev, "Unknown signature.\n");
1393                 goto end;
1394         }
1395
1396         retval = request_firmware(&fw, name, &pdev->dev);
1397         if (retval)
1398                 goto end;
1399
1400         retval = -EIO;
1401
1402         for (frame = (struct stframe *)fw->data;
1403                         frame < (struct stframe *)(fw->data + fw->size);
1404                         frame = (struct stframe *)((u8 *)(frame + 1) +
1405                                 frame->count)) {
1406                 if (WaitTillCardIsFree(base))
1407                         goto errrelfw;
1408
1409                 outw(0xf0, base);       /* start upload sequence */
1410                 outw(0x00, base);
1411                 outw(frame->addr, base); /* lsb of address */
1412
1413                 word_count = frame->count / 2 + frame->count % 2;
1414                 outw(word_count, base);
1415                 InterruptTheCard(base);
1416
1417                 udelay(100); /* 0x2f */
1418
1419                 if (WaitTillCardIsFree(base))
1420                         goto errrelfw;
1421
1422                 status = inw(base + 0x4);
1423                 if (status != 0) {
1424                         dev_warn(&pdev->dev, "Card%d rejected load header:\n"
1425                                  "Address:0x%x\n"
1426                                  "Count:0x%x\n"
1427                                  "Status:0x%x\n",
1428                                  index + 1, frame->addr, frame->count, status);
1429                         goto errrelfw;
1430                 }
1431                 outsw(base, frame->data, word_count);
1432
1433                 InterruptTheCard(base);
1434
1435                 udelay(50); /* 0x0f */
1436
1437                 if (WaitTillCardIsFree(base))
1438                         goto errrelfw;
1439
1440                 status = inw(base + 0x4);
1441                 if (status != 0) {
1442                         dev_err(&pdev->dev, "Card%d got out of sync.Card "
1443                                 "Status:0x%x\n", index + 1, status);
1444                         goto errrelfw;
1445                 }
1446         }
1447
1448 /* XXX: should we test it by reading it back and comparing with original like
1449  * in load firmware package? */
1450         for (frame = (struct stframe *)fw->data;
1451                         frame < (struct stframe *)(fw->data + fw->size);
1452                         frame = (struct stframe *)((u8 *)(frame + 1) +
1453                                 frame->count)) {
1454                 if (WaitTillCardIsFree(base))
1455                         goto errrelfw;
1456
1457                 outw(0xf1, base); /* start download sequence */
1458                 outw(0x00, base);
1459                 outw(frame->addr, base); /* lsb of address */
1460
1461                 word_count = (frame->count >> 1) + frame->count % 2;
1462                 outw(word_count + 1, base);
1463                 InterruptTheCard(base);
1464
1465                 udelay(50); /* 0xf */
1466
1467                 if (WaitTillCardIsFree(base))
1468                         goto errrelfw;
1469
1470                 status = inw(base + 0x4);
1471                 if (status != 0) {
1472                         dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
1473                                  "Address:0x%x\n"
1474                                  "Count:0x%x\n"
1475                                  "Status: 0x%x\n",
1476                                  index + 1, frame->addr, frame->count, status);
1477                         goto errrelfw;
1478                 }
1479
1480                 data = kmalloc_array(word_count, 2, GFP_KERNEL);
1481                 if (data == NULL) {
1482                         dev_err(&pdev->dev, "Card%d, firmware upload "
1483                                 "failed, not enough memory\n", index + 1);
1484                         goto errrelfw;
1485                 }
1486                 inw(base);
1487                 insw(base, data, word_count);
1488                 InterruptTheCard(base);
1489
1490                 for (a = 0; a < frame->count; a++)
1491                         if (data[a] != frame->data[a]) {
1492                                 kfree(data);
1493                                 dev_err(&pdev->dev, "Card%d, firmware upload "
1494                                         "failed\n", index + 1);
1495                                 goto errrelfw;
1496                         }
1497                 kfree(data);
1498
1499                 udelay(50); /* 0xf */
1500
1501                 if (WaitTillCardIsFree(base))
1502                         goto errrelfw;
1503
1504                 status = inw(base + 0x4);
1505                 if (status != 0) {
1506                         dev_err(&pdev->dev, "Card%d verify got out of sync. "
1507                                 "Card Status:0x%x\n", index + 1, status);
1508                         goto errrelfw;
1509                 }
1510         }
1511
1512         /* xfer ctrl */
1513         if (WaitTillCardIsFree(base))
1514                 goto errrelfw;
1515
1516         outw(0xf2, base);
1517         outw(0x800, base);
1518         outw(0x0, base);
1519         outw(0x0, base);
1520         InterruptTheCard(base);
1521         outw(0x0, base + 0x4); /* for ISI4608 cards */
1522
1523         board->status |= FIRMWARE_LOADED;
1524         retval = 0;
1525
1526 errrelfw:
1527         release_firmware(fw);
1528 end:
1529         return retval;
1530 }
1531
1532 /*
1533  *      Insmod can set static symbols so keep these static
1534  */
1535 static unsigned int card_count;
1536
1537 static int isicom_probe(struct pci_dev *pdev,
1538         const struct pci_device_id *ent)
1539 {
1540         unsigned int uninitialized_var(signature), index;
1541         int retval = -EPERM;
1542         struct isi_board *board = NULL;
1543
1544         if (card_count >= BOARD_COUNT)
1545                 goto err;
1546
1547         retval = pci_enable_device(pdev);
1548         if (retval) {
1549                 dev_err(&pdev->dev, "failed to enable\n");
1550                 goto err;
1551         }
1552
1553         dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
1554
1555         /* allot the first empty slot in the array */
1556         for (index = 0; index < BOARD_COUNT; index++) {
1557                 if (isi_card[index].base == 0) {
1558                         board = &isi_card[index];
1559                         break;
1560                 }
1561         }
1562         if (index == BOARD_COUNT) {
1563                 retval = -ENODEV;
1564                 goto err_disable;
1565         }
1566
1567         board->index = index;
1568         board->base = pci_resource_start(pdev, 3);
1569         board->irq = pdev->irq;
1570         card_count++;
1571
1572         pci_set_drvdata(pdev, board);
1573
1574         retval = pci_request_region(pdev, 3, ISICOM_NAME);
1575         if (retval) {
1576                 dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d "
1577                         "will be disabled.\n", board->base, board->base + 15,
1578                         index + 1);
1579                 retval = -EBUSY;
1580                 goto errdec;
1581         }
1582
1583         retval = request_irq(board->irq, isicom_interrupt,
1584                         IRQF_SHARED, ISICOM_NAME, board);
1585         if (retval < 0) {
1586                 dev_err(&pdev->dev, "Could not install handler at Irq %d. "
1587                         "Card%d will be disabled.\n", board->irq, index + 1);
1588                 goto errunrr;
1589         }
1590
1591         retval = reset_card(pdev, index, &signature);
1592         if (retval < 0)
1593                 goto errunri;
1594
1595         retval = load_firmware(pdev, index, signature);
1596         if (retval < 0)
1597                 goto errunri;
1598
1599         for (index = 0; index < board->port_count; index++) {
1600                 struct tty_port *tport = &board->ports[index].port;
1601                 tty_port_init(tport);
1602                 tport->ops = &isicom_port_ops;
1603                 tport->close_delay = 50 * HZ/100;
1604                 tport->closing_wait = 3000 * HZ/100;
1605                 tty_port_register_device(tport, isicom_normal,
1606                                 board->index * 16 + index, &pdev->dev);
1607         }
1608
1609         return 0;
1610
1611 errunri:
1612         free_irq(board->irq, board);
1613 errunrr:
1614         pci_release_region(pdev, 3);
1615 errdec:
1616         board->base = 0;
1617         card_count--;
1618 err_disable:
1619         pci_disable_device(pdev);
1620 err:
1621         return retval;
1622 }
1623
1624 static void isicom_remove(struct pci_dev *pdev)
1625 {
1626         struct isi_board *board = pci_get_drvdata(pdev);
1627         unsigned int i;
1628
1629         for (i = 0; i < board->port_count; i++) {
1630                 tty_unregister_device(isicom_normal, board->index * 16 + i);
1631                 tty_port_destroy(&board->ports[i].port);
1632         }
1633
1634         free_irq(board->irq, board);
1635         pci_release_region(pdev, 3);
1636         board->base = 0;
1637         card_count--;
1638         pci_disable_device(pdev);
1639 }
1640
1641 static int __init isicom_init(void)
1642 {
1643         int retval, idx, channel;
1644         struct isi_port *port;
1645
1646         for (idx = 0; idx < BOARD_COUNT; idx++) {
1647                 port = &isi_ports[idx * 16];
1648                 isi_card[idx].ports = port;
1649                 spin_lock_init(&isi_card[idx].card_lock);
1650                 for (channel = 0; channel < 16; channel++, port++) {
1651                         port->magic = ISICOM_MAGIC;
1652                         port->card = &isi_card[idx];
1653                         port->channel = channel;
1654                         port->status = 0;
1655                         /*  . . .  */
1656                 }
1657                 isi_card[idx].base = 0;
1658                 isi_card[idx].irq = 0;
1659         }
1660
1661         /* tty driver structure initialization */
1662         isicom_normal = alloc_tty_driver(PORT_COUNT);
1663         if (!isicom_normal) {
1664                 retval = -ENOMEM;
1665                 goto error;
1666         }
1667
1668         isicom_normal->name                     = "ttyM";
1669         isicom_normal->major                    = ISICOM_NMAJOR;
1670         isicom_normal->minor_start              = 0;
1671         isicom_normal->type                     = TTY_DRIVER_TYPE_SERIAL;
1672         isicom_normal->subtype                  = SERIAL_TYPE_NORMAL;
1673         isicom_normal->init_termios             = tty_std_termios;
1674         isicom_normal->init_termios.c_cflag     = B9600 | CS8 | CREAD | HUPCL |
1675                 CLOCAL;
1676         isicom_normal->flags                    = TTY_DRIVER_REAL_RAW |
1677                 TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK;
1678         tty_set_operations(isicom_normal, &isicom_ops);
1679
1680         retval = tty_register_driver(isicom_normal);
1681         if (retval) {
1682                 pr_debug("Couldn't register the dialin driver\n");
1683                 goto err_puttty;
1684         }
1685
1686         retval = pci_register_driver(&isicom_driver);
1687         if (retval < 0) {
1688                 pr_err("Unable to register pci driver.\n");
1689                 goto err_unrtty;
1690         }
1691
1692         mod_timer(&tx, jiffies + 1);
1693
1694         return 0;
1695 err_unrtty:
1696         tty_unregister_driver(isicom_normal);
1697 err_puttty:
1698         put_tty_driver(isicom_normal);
1699 error:
1700         return retval;
1701 }
1702
1703 static void __exit isicom_exit(void)
1704 {
1705         del_timer_sync(&tx);
1706
1707         pci_unregister_driver(&isicom_driver);
1708         tty_unregister_driver(isicom_normal);
1709         put_tty_driver(isicom_normal);
1710 }
1711
1712 module_init(isicom_init);
1713 module_exit(isicom_exit);
1714
1715 MODULE_AUTHOR("MultiTech");
1716 MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
1717 MODULE_LICENSE("GPL");
1718 MODULE_FIRMWARE("isi608.bin");
1719 MODULE_FIRMWARE("isi608em.bin");
1720 MODULE_FIRMWARE("isi616em.bin");
1721 MODULE_FIRMWARE("isi4608.bin");
1722 MODULE_FIRMWARE("isi4616.bin");