Root/drivers/tty/isicom.c

1/*
2 * This program is free software; you can redistribute it and/or
3 * modify it under the terms of the GNU General Public License
4 * as published by the Free Software Foundation; either version
5 * 2 of the License, or (at your option) any later version.
6 *
7 * Original driver code supplied by Multi-Tech
8 *
9 * Changes
10 * 1/9/98 alan@lxorguk.ukuu.org.uk
11 * Merge to 2.0.x kernel tree
12 * Obtain and use official major/minors
13 * Loader switched to a misc device
14 * (fixed range check bug as a side effect)
15 * Printk clean up
16 * 9/12/98 alan@lxorguk.ukuu.org.uk
17 * Rough port to 2.1.x
18 *
19 * 10/6/99 sameer Merged the ISA and PCI drivers to
20 * a new unified driver.
21 *
22 * 3/9/99 sameer Added support for ISI4616 cards.
23 *
24 * 16/9/99 sameer We do not force RTS low anymore.
25 * This is to prevent the firmware
26 * from getting confused.
27 *
28 * 26/10/99 sameer Cosmetic changes:The driver now
29 * dumps the Port Count information
30 * along with I/O address and IRQ.
31 *
32 * 13/12/99 sameer Fixed the problem with IRQ sharing.
33 *
34 * 10/5/00 sameer Fixed isicom_shutdown_board()
35 * to not lower DTR on all the ports
36 * when the last port on the card is
37 * closed.
38 *
39 * 10/5/00 sameer Signal mask setup command added
40 * to isicom_setup_port and
41 * isicom_shutdown_port.
42 *
43 * 24/5/00 sameer The driver is now SMP aware.
44 *
45 *
46 * 27/11/00 Vinayak P Risbud Fixed the Driver Crash Problem
47 *
48 *
49 * 03/01/01 anil .s Added support for resetting the
50 * internal modems on ISI cards.
51 *
52 * 08/02/01 anil .s Upgraded the driver for kernel
53 * 2.4.x
54 *
55 * 11/04/01 Kevin Fixed firmware load problem with
56 * ISIHP-4X card
57 *
58 * 30/04/01 anil .s Fixed the remote login through
59 * ISI port problem. Now the link
60 * does not go down before password
61 * prompt.
62 *
63 * 03/05/01 anil .s Fixed the problem with IRQ sharing
64 * among ISI-PCI cards.
65 *
66 * 03/05/01 anil .s Added support to display the version
67 * info during insmod as well as module
68 * listing by lsmod.
69 *
70 * 10/05/01 anil .s Done the modifications to the source
71 * file and Install script so that the
72 * same installation can be used for
73 * 2.2.x and 2.4.x kernel.
74 *
75 * 06/06/01 anil .s Now we drop both dtr and rts during
76 * shutdown_port as well as raise them
77 * during isicom_config_port.
78 *
79 * 09/06/01 acme@conectiva.com.br use capable, not suser, do
80 * restore_flags on failure in
81 * isicom_send_break, verify put_user
82 * result
83 *
84 * 11/02/03 ranjeeth Added support for 230 Kbps and 460 Kbps
85 * Baud index extended to 21
86 *
87 * 20/03/03 ranjeeth Made to work for Linux Advanced server.
88 * Taken care of license warning.
89 *
90 * 10/12/03 Ravindra Made to work for Fedora Core 1 of
91 * Red Hat Distribution
92 *
93 * 06/01/05 Alan Cox Merged the ISI and base kernel strands
94 * into a single 2.6 driver
95 *
96 * ***********************************************************
97 *
98 * To use this driver you also need the support package. You
99 * can find this in RPM format on
100 * ftp://ftp.linux.org.uk/pub/linux/alan
101 *
102 * You can find the original tools for this direct from Multitech
103 * ftp://ftp.multitech.com/ISI-Cards/
104 *
105 * Having installed the cards the module options (/etc/modprobe.d/)
106 *
107 * options isicom io=card1,card2,card3,card4 irq=card1,card2,card3,card4
108 *
109 * Omit those entries for boards you don't have installed.
110 *
111 * TODO
112 * Merge testing
113 * 64-bit verification
114 */
115
116#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
117
118#include <linux/module.h>
119#include <linux/firmware.h>
120#include <linux/kernel.h>
121#include <linux/tty.h>
122#include <linux/tty_flip.h>
123#include <linux/termios.h>
124#include <linux/fs.h>
125#include <linux/sched.h>
126#include <linux/serial.h>
127#include <linux/mm.h>
128#include <linux/interrupt.h>
129#include <linux/timer.h>
130#include <linux/delay.h>
131#include <linux/ioport.h>
132#include <linux/slab.h>
133
134#include <linux/uaccess.h>
135#include <linux/io.h>
136
137#include <linux/pci.h>
138
139#include <linux/isicom.h>
140
141#define InterruptTheCard(base) outw(0, (base) + 0xc)
142#define ClearInterrupt(base) inw((base) + 0x0a)
143
144#ifdef DEBUG
145#define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c))
146#else
147#define isicom_paranoia_check(a, b, c) 0
148#endif
149
150static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
151static void __devexit isicom_remove(struct pci_dev *);
152
153static struct pci_device_id isicom_pci_tbl[] = {
154    { PCI_DEVICE(VENDOR_ID, 0x2028) },
155    { PCI_DEVICE(VENDOR_ID, 0x2051) },
156    { PCI_DEVICE(VENDOR_ID, 0x2052) },
157    { PCI_DEVICE(VENDOR_ID, 0x2053) },
158    { PCI_DEVICE(VENDOR_ID, 0x2054) },
159    { PCI_DEVICE(VENDOR_ID, 0x2055) },
160    { PCI_DEVICE(VENDOR_ID, 0x2056) },
161    { PCI_DEVICE(VENDOR_ID, 0x2057) },
162    { PCI_DEVICE(VENDOR_ID, 0x2058) },
163    { 0 }
164};
165MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
166
167static struct pci_driver isicom_driver = {
168    .name = "isicom",
169    .id_table = isicom_pci_tbl,
170    .probe = isicom_probe,
171    .remove = __devexit_p(isicom_remove)
172};
173
174static int prev_card = 3; /* start servicing isi_card[0] */
175static struct tty_driver *isicom_normal;
176
177static void isicom_tx(unsigned long _data);
178static void isicom_start(struct tty_struct *tty);
179
180static DEFINE_TIMER(tx, isicom_tx, 0, 0);
181
182/* baud index mappings from linux defns to isi */
183
184static signed char linuxb_to_isib[] = {
185    -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19, 20, 21
186};
187
188struct isi_board {
189    unsigned long base;
190    int irq;
191    unsigned char port_count;
192    unsigned short status;
193    unsigned short port_status; /* each bit for each port */
194    unsigned short shift_count;
195    struct isi_port *ports;
196    signed char count;
197    spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */
198    unsigned long flags;
199    unsigned int index;
200};
201
202struct isi_port {
203    unsigned short magic;
204    struct tty_port port;
205    u16 channel;
206    u16 status;
207    struct isi_board *card;
208    unsigned char *xmit_buf;
209    int xmit_head;
210    int xmit_tail;
211    int xmit_cnt;
212};
213
214static struct isi_board isi_card[BOARD_COUNT];
215static struct isi_port isi_ports[PORT_COUNT];
216
217/*
218 * Locking functions for card level locking. We need to own both
219 * the kernel lock for the card and have the card in a position that
220 * it wants to talk.
221 */
222
223static inline int WaitTillCardIsFree(unsigned long base)
224{
225    unsigned int count = 0;
226    unsigned int a = in_atomic(); /* do we run under spinlock? */
227
228    while (!(inw(base + 0xe) & 0x1) && count++ < 100)
229        if (a)
230            mdelay(1);
231        else
232            msleep(1);
233
234    return !(inw(base + 0xe) & 0x1);
235}
236
237static int lock_card(struct isi_board *card)
238{
239    unsigned long base = card->base;
240    unsigned int retries, a;
241
242    for (retries = 0; retries < 10; retries++) {
243        spin_lock_irqsave(&card->card_lock, card->flags);
244        for (a = 0; a < 10; a++) {
245            if (inw(base + 0xe) & 0x1)
246                return 1;
247            udelay(10);
248        }
249        spin_unlock_irqrestore(&card->card_lock, card->flags);
250        msleep(10);
251    }
252    pr_warning("Failed to lock Card (0x%lx)\n", card->base);
253
254    return 0; /* Failed to acquire the card! */
255}
256
257static void unlock_card(struct isi_board *card)
258{
259    spin_unlock_irqrestore(&card->card_lock, card->flags);
260}
261
262/*
263 * ISI Card specific ops ...
264 */
265
266/* card->lock HAS to be held */
267static void raise_dtr(struct isi_port *port)
268{
269    struct isi_board *card = port->card;
270    unsigned long base = card->base;
271    u16 channel = port->channel;
272
273    if (WaitTillCardIsFree(base))
274        return;
275
276    outw(0x8000 | (channel << card->shift_count) | 0x02, base);
277    outw(0x0504, base);
278    InterruptTheCard(base);
279    port->status |= ISI_DTR;
280}
281
282/* card->lock HAS to be held */
283static inline void drop_dtr(struct isi_port *port)
284{
285    struct isi_board *card = port->card;
286    unsigned long base = card->base;
287    u16 channel = port->channel;
288
289    if (WaitTillCardIsFree(base))
290        return;
291
292    outw(0x8000 | (channel << card->shift_count) | 0x02, base);
293    outw(0x0404, base);
294    InterruptTheCard(base);
295    port->status &= ~ISI_DTR;
296}
297
298/* card->lock HAS to be held */
299static inline void raise_rts(struct isi_port *port)
300{
301    struct isi_board *card = port->card;
302    unsigned long base = card->base;
303    u16 channel = port->channel;
304
305    if (WaitTillCardIsFree(base))
306        return;
307
308    outw(0x8000 | (channel << card->shift_count) | 0x02, base);
309    outw(0x0a04, base);
310    InterruptTheCard(base);
311    port->status |= ISI_RTS;
312}
313
314/* card->lock HAS to be held */
315static inline void drop_rts(struct isi_port *port)
316{
317    struct isi_board *card = port->card;
318    unsigned long base = card->base;
319    u16 channel = port->channel;
320
321    if (WaitTillCardIsFree(base))
322        return;
323
324    outw(0x8000 | (channel << card->shift_count) | 0x02, base);
325    outw(0x0804, base);
326    InterruptTheCard(base);
327    port->status &= ~ISI_RTS;
328}
329
330/* card->lock MUST NOT be held */
331
332static void isicom_dtr_rts(struct tty_port *port, int on)
333{
334    struct isi_port *ip = container_of(port, struct isi_port, port);
335    struct isi_board *card = ip->card;
336    unsigned long base = card->base;
337    u16 channel = ip->channel;
338
339    if (!lock_card(card))
340        return;
341
342    if (on) {
343        outw(0x8000 | (channel << card->shift_count) | 0x02, base);
344        outw(0x0f04, base);
345        InterruptTheCard(base);
346        ip->status |= (ISI_DTR | ISI_RTS);
347    } else {
348        outw(0x8000 | (channel << card->shift_count) | 0x02, base);
349        outw(0x0C04, base);
350        InterruptTheCard(base);
351        ip->status &= ~(ISI_DTR | ISI_RTS);
352    }
353    unlock_card(card);
354}
355
356/* card->lock HAS to be held */
357static void drop_dtr_rts(struct isi_port *port)
358{
359    struct isi_board *card = port->card;
360    unsigned long base = card->base;
361    u16 channel = port->channel;
362
363    if (WaitTillCardIsFree(base))
364        return;
365
366    outw(0x8000 | (channel << card->shift_count) | 0x02, base);
367    outw(0x0c04, base);
368    InterruptTheCard(base);
369    port->status &= ~(ISI_RTS | ISI_DTR);
370}
371
372/*
373 * ISICOM Driver specific routines ...
374 *
375 */
376
377static inline int __isicom_paranoia_check(struct isi_port const *port,
378    char *name, const char *routine)
379{
380    if (!port) {
381        pr_warning("Warning: bad isicom magic for dev %s in %s.\n",
382               name, routine);
383        return 1;
384    }
385    if (port->magic != ISICOM_MAGIC) {
386        pr_warning("Warning: NULL isicom port for dev %s in %s.\n",
387               name, routine);
388        return 1;
389    }
390
391    return 0;
392}
393
394/*
395 * Transmitter.
396 *
397 * We shovel data into the card buffers on a regular basis. The card
398 * will do the rest of the work for us.
399 */
400
401static void isicom_tx(unsigned long _data)
402{
403    unsigned long flags, base;
404    unsigned int retries;
405    short count = (BOARD_COUNT-1), card;
406    short txcount, wrd, residue, word_count, cnt;
407    struct isi_port *port;
408    struct tty_struct *tty;
409
410    /* find next active board */
411    card = (prev_card + 1) & 0x0003;
412    while (count-- > 0) {
413        if (isi_card[card].status & BOARD_ACTIVE)
414            break;
415        card = (card + 1) & 0x0003;
416    }
417    if (!(isi_card[card].status & BOARD_ACTIVE))
418        goto sched_again;
419
420    prev_card = card;
421
422    count = isi_card[card].port_count;
423    port = isi_card[card].ports;
424    base = isi_card[card].base;
425
426    spin_lock_irqsave(&isi_card[card].card_lock, flags);
427    for (retries = 0; retries < 100; retries++) {
428        if (inw(base + 0xe) & 0x1)
429            break;
430        udelay(2);
431    }
432    if (retries >= 100)
433        goto unlock;
434
435    tty = tty_port_tty_get(&port->port);
436    if (tty == NULL)
437        goto put_unlock;
438
439    for (; count > 0; count--, port++) {
440        /* port not active or tx disabled to force flow control */
441        if (!(port->port.flags & ASYNC_INITIALIZED) ||
442                !(port->status & ISI_TXOK))
443            continue;
444
445        txcount = min_t(short, TX_SIZE, port->xmit_cnt);
446        if (txcount <= 0 || tty->stopped || tty->hw_stopped)
447            continue;
448
449        if (!(inw(base + 0x02) & (1 << port->channel)))
450            continue;
451
452        pr_debug("txing %d bytes, port%d.\n",
453             txcount, port->channel + 1);
454        outw((port->channel << isi_card[card].shift_count) | txcount,
455            base);
456        residue = NO;
457        wrd = 0;
458        while (1) {
459            cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE
460                    - port->xmit_tail));
461            if (residue == YES) {
462                residue = NO;
463                if (cnt > 0) {
464                    wrd |= (port->port.xmit_buf[port->xmit_tail]
465                                    << 8);
466                    port->xmit_tail = (port->xmit_tail + 1)
467                        & (SERIAL_XMIT_SIZE - 1);
468                    port->xmit_cnt--;
469                    txcount--;
470                    cnt--;
471                    outw(wrd, base);
472                } else {
473                    outw(wrd, base);
474                    break;
475                }
476            }
477            if (cnt <= 0)
478                break;
479            word_count = cnt >> 1;
480            outsw(base, port->port.xmit_buf+port->xmit_tail, word_count);
481            port->xmit_tail = (port->xmit_tail
482                + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1);
483            txcount -= (word_count << 1);
484            port->xmit_cnt -= (word_count << 1);
485            if (cnt & 0x0001) {
486                residue = YES;
487                wrd = port->port.xmit_buf[port->xmit_tail];
488                port->xmit_tail = (port->xmit_tail + 1)
489                    & (SERIAL_XMIT_SIZE - 1);
490                port->xmit_cnt--;
491                txcount--;
492            }
493        }
494
495        InterruptTheCard(base);
496        if (port->xmit_cnt <= 0)
497            port->status &= ~ISI_TXOK;
498        if (port->xmit_cnt <= WAKEUP_CHARS)
499            tty_wakeup(tty);
500    }
501
502put_unlock:
503    tty_kref_put(tty);
504unlock:
505    spin_unlock_irqrestore(&isi_card[card].card_lock, flags);
506    /* schedule another tx for hopefully in about 10ms */
507sched_again:
508    mod_timer(&tx, jiffies + msecs_to_jiffies(10));
509}
510
511/*
512 * Main interrupt handler routine
513 */
514
515static irqreturn_t isicom_interrupt(int irq, void *dev_id)
516{
517    struct isi_board *card = dev_id;
518    struct isi_port *port;
519    struct tty_struct *tty;
520    unsigned long base;
521    u16 header, word_count, count, channel;
522    short byte_count;
523    unsigned char *rp;
524
525    if (!card || !(card->status & FIRMWARE_LOADED))
526        return IRQ_NONE;
527
528    base = card->base;
529
530    /* did the card interrupt us? */
531    if (!(inw(base + 0x0e) & 0x02))
532        return IRQ_NONE;
533
534    spin_lock(&card->card_lock);
535
536    /*
537     * disable any interrupts from the PCI card and lower the
538     * interrupt line
539     */
540    outw(0x8000, base+0x04);
541    ClearInterrupt(base);
542
543    inw(base); /* get the dummy word out */
544    header = inw(base);
545    channel = (header & 0x7800) >> card->shift_count;
546    byte_count = header & 0xff;
547
548    if (channel + 1 > card->port_count) {
549        pr_warning("%s(0x%lx): %d(channel) > port_count.\n",
550               __func__, base, channel+1);
551        outw(0x0000, base+0x04); /* enable interrupts */
552        spin_unlock(&card->card_lock);
553        return IRQ_HANDLED;
554    }
555    port = card->ports + channel;
556    if (!(port->port.flags & ASYNC_INITIALIZED)) {
557        outw(0x0000, base+0x04); /* enable interrupts */
558        spin_unlock(&card->card_lock);
559        return IRQ_HANDLED;
560    }
561
562    tty = tty_port_tty_get(&port->port);
563    if (tty == NULL) {
564        word_count = byte_count >> 1;
565        while (byte_count > 1) {
566            inw(base);
567            byte_count -= 2;
568        }
569        if (byte_count & 0x01)
570            inw(base);
571        outw(0x0000, base+0x04); /* enable interrupts */
572        spin_unlock(&card->card_lock);
573        return IRQ_HANDLED;
574    }
575
576    if (header & 0x8000) { /* Status Packet */
577        header = inw(base);
578        switch (header & 0xff) {
579        case 0: /* Change in EIA signals */
580            if (port->port.flags & ASYNC_CHECK_CD) {
581                if (port->status & ISI_DCD) {
582                    if (!(header & ISI_DCD)) {
583                    /* Carrier has been lost */
584                        pr_debug("%s: DCD->low.\n",
585                             __func__);
586                        port->status &= ~ISI_DCD;
587                        tty_hangup(tty);
588                    }
589                } else if (header & ISI_DCD) {
590                /* Carrier has been detected */
591                    pr_debug("%s: DCD->high.\n",
592                        __func__);
593                    port->status |= ISI_DCD;
594                    wake_up_interruptible(&port->port.open_wait);
595                }
596            } else {
597                if (header & ISI_DCD)
598                    port->status |= ISI_DCD;
599                else
600                    port->status &= ~ISI_DCD;
601            }
602
603            if (port->port.flags & ASYNC_CTS_FLOW) {
604                if (tty->hw_stopped) {
605                    if (header & ISI_CTS) {
606                        port->port.tty->hw_stopped = 0;
607                        /* start tx ing */
608                        port->status |= (ISI_TXOK
609                            | ISI_CTS);
610                        tty_wakeup(tty);
611                    }
612                } else if (!(header & ISI_CTS)) {
613                    tty->hw_stopped = 1;
614                    /* stop tx ing */
615                    port->status &= ~(ISI_TXOK | ISI_CTS);
616                }
617            } else {
618                if (header & ISI_CTS)
619                    port->status |= ISI_CTS;
620                else
621                    port->status &= ~ISI_CTS;
622            }
623
624            if (header & ISI_DSR)
625                port->status |= ISI_DSR;
626            else
627                port->status &= ~ISI_DSR;
628
629            if (header & ISI_RI)
630                port->status |= ISI_RI;
631            else
632                port->status &= ~ISI_RI;
633
634            break;
635
636        case 1: /* Received Break !!! */
637            tty_insert_flip_char(tty, 0, TTY_BREAK);
638            if (port->port.flags & ASYNC_SAK)
639                do_SAK(tty);
640            tty_flip_buffer_push(tty);
641            break;
642
643        case 2: /* Statistics */
644            pr_debug("%s: stats!!!\n", __func__);
645            break;
646
647        default:
648            pr_debug("%s: Unknown code in status packet.\n",
649                 __func__);
650            break;
651        }
652    } else { /* Data Packet */
653
654        count = tty_prepare_flip_string(tty, &rp, byte_count & ~1);
655        pr_debug("%s: Can rx %d of %d bytes.\n",
656             __func__, count, byte_count);
657        word_count = count >> 1;
658        insw(base, rp, word_count);
659        byte_count -= (word_count << 1);
660        if (count & 0x0001) {
661            tty_insert_flip_char(tty, inw(base) & 0xff,
662                TTY_NORMAL);
663            byte_count -= 2;
664        }
665        if (byte_count > 0) {
666            pr_debug("%s(0x%lx:%d): Flip buffer overflow! dropping bytes...\n",
667                 __func__, base, channel + 1);
668        /* drain out unread xtra data */
669        while (byte_count > 0) {
670                inw(base);
671                byte_count -= 2;
672            }
673        }
674        tty_flip_buffer_push(tty);
675    }
676    outw(0x0000, base+0x04); /* enable interrupts */
677    spin_unlock(&card->card_lock);
678    tty_kref_put(tty);
679
680    return IRQ_HANDLED;
681}
682
683static void isicom_config_port(struct tty_struct *tty)
684{
685    struct isi_port *port = tty->driver_data;
686    struct isi_board *card = port->card;
687    unsigned long baud;
688    unsigned long base = card->base;
689    u16 channel_setup, channel = port->channel,
690        shift_count = card->shift_count;
691    unsigned char flow_ctrl;
692
693    /* FIXME: Switch to new tty baud API */
694    baud = C_BAUD(tty);
695    if (baud & CBAUDEX) {
696        baud &= ~CBAUDEX;
697
698        /* if CBAUDEX bit is on and the baud is set to either 50 or 75
699         * then the card is programmed for 57.6Kbps or 115Kbps
700         * respectively.
701         */
702
703        /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */
704        if (baud < 1 || baud > 4)
705            tty->termios->c_cflag &= ~CBAUDEX;
706        else
707            baud += 15;
708    }
709    if (baud == 15) {
710
711        /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
712         * by the set_serial_info ioctl ... this is done by
713         * the 'setserial' utility.
714         */
715
716        if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
717            baud++; /* 57.6 Kbps */
718        if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
719            baud += 2; /* 115 Kbps */
720        if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
721            baud += 3; /* 230 kbps*/
722        if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
723            baud += 4; /* 460 kbps*/
724    }
725    if (linuxb_to_isib[baud] == -1) {
726        /* hang up */
727        drop_dtr(port);
728        return;
729    } else
730        raise_dtr(port);
731
732    if (WaitTillCardIsFree(base) == 0) {
733        outw(0x8000 | (channel << shift_count) | 0x03, base);
734        outw(linuxb_to_isib[baud] << 8 | 0x03, base);
735        channel_setup = 0;
736        switch (C_CSIZE(tty)) {
737        case CS5:
738            channel_setup |= ISICOM_CS5;
739            break;
740        case CS6:
741            channel_setup |= ISICOM_CS6;
742            break;
743        case CS7:
744            channel_setup |= ISICOM_CS7;
745            break;
746        case CS8:
747            channel_setup |= ISICOM_CS8;
748            break;
749        }
750
751        if (C_CSTOPB(tty))
752            channel_setup |= ISICOM_2SB;
753        if (C_PARENB(tty)) {
754            channel_setup |= ISICOM_EVPAR;
755            if (C_PARODD(tty))
756                channel_setup |= ISICOM_ODPAR;
757        }
758        outw(channel_setup, base);
759        InterruptTheCard(base);
760    }
761    if (C_CLOCAL(tty))
762        port->port.flags &= ~ASYNC_CHECK_CD;
763    else
764        port->port.flags |= ASYNC_CHECK_CD;
765
766    /* flow control settings ...*/
767    flow_ctrl = 0;
768    port->port.flags &= ~ASYNC_CTS_FLOW;
769    if (C_CRTSCTS(tty)) {
770        port->port.flags |= ASYNC_CTS_FLOW;
771        flow_ctrl |= ISICOM_CTSRTS;
772    }
773    if (I_IXON(tty))
774        flow_ctrl |= ISICOM_RESPOND_XONXOFF;
775    if (I_IXOFF(tty))
776        flow_ctrl |= ISICOM_INITIATE_XONXOFF;
777
778    if (WaitTillCardIsFree(base) == 0) {
779        outw(0x8000 | (channel << shift_count) | 0x04, base);
780        outw(flow_ctrl << 8 | 0x05, base);
781        outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
782        InterruptTheCard(base);
783    }
784
785    /* rx enabled -> enable port for rx on the card */
786    if (C_CREAD(tty)) {
787        card->port_status |= (1 << channel);
788        outw(card->port_status, base + 0x02);
789    }
790}
791
792/* open et all */
793
794static inline void isicom_setup_board(struct isi_board *bp)
795{
796    int channel;
797    struct isi_port *port;
798
799    bp->count++;
800    if (!(bp->status & BOARD_INIT)) {
801        port = bp->ports;
802        for (channel = 0; channel < bp->port_count; channel++, port++)
803            drop_dtr_rts(port);
804    }
805    bp->status |= BOARD_ACTIVE | BOARD_INIT;
806}
807
808/* Activate and thus setup board are protected from races against shutdown
809   by the tty_port mutex */
810
811static int isicom_activate(struct tty_port *tport, struct tty_struct *tty)
812{
813    struct isi_port *port = container_of(tport, struct isi_port, port);
814    struct isi_board *card = port->card;
815    unsigned long flags;
816
817    if (tty_port_alloc_xmit_buf(tport) < 0)
818        return -ENOMEM;
819
820    spin_lock_irqsave(&card->card_lock, flags);
821    isicom_setup_board(card);
822
823    port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
824
825    /* discard any residual data */
826    if (WaitTillCardIsFree(card->base) == 0) {
827        outw(0x8000 | (port->channel << card->shift_count) | 0x02,
828                card->base);
829        outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base);
830        InterruptTheCard(card->base);
831    }
832    isicom_config_port(tty);
833    spin_unlock_irqrestore(&card->card_lock, flags);
834
835    return 0;
836}
837
838static int isicom_carrier_raised(struct tty_port *port)
839{
840    struct isi_port *ip = container_of(port, struct isi_port, port);
841    return (ip->status & ISI_DCD)?1 : 0;
842}
843
844static struct tty_port *isicom_find_port(struct tty_struct *tty)
845{
846    struct isi_port *port;
847    struct isi_board *card;
848    unsigned int board;
849    int line = tty->index;
850
851    board = BOARD(line);
852    card = &isi_card[board];
853
854    if (!(card->status & FIRMWARE_LOADED))
855        return NULL;
856
857    /* open on a port greater than the port count for the card !!! */
858    if (line > ((board * 16) + card->port_count - 1))
859        return NULL;
860
861    port = &isi_ports[line];
862    if (isicom_paranoia_check(port, tty->name, "isicom_open"))
863        return NULL;
864
865    return &port->port;
866}
867
868static int isicom_open(struct tty_struct *tty, struct file *filp)
869{
870    struct isi_port *port;
871    struct tty_port *tport;
872
873    tport = isicom_find_port(tty);
874    if (tport == NULL)
875        return -ENODEV;
876    port = container_of(tport, struct isi_port, port);
877
878    tty->driver_data = port;
879    return tty_port_open(tport, tty, filp);
880}
881
882/* close et all */
883
884/* card->lock HAS to be held */
885static void isicom_shutdown_port(struct isi_port *port)
886{
887    struct isi_board *card = port->card;
888
889    if (--card->count < 0) {
890        pr_debug("%s: bad board(0x%lx) count %d.\n",
891             __func__, card->base, card->count);
892        card->count = 0;
893    }
894    /* last port was closed, shutdown that board too */
895    if (!card->count)
896        card->status &= BOARD_ACTIVE;
897}
898
899static void isicom_flush_buffer(struct tty_struct *tty)
900{
901    struct isi_port *port = tty->driver_data;
902    struct isi_board *card = port->card;
903    unsigned long flags;
904
905    if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
906        return;
907
908    spin_lock_irqsave(&card->card_lock, flags);
909    port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
910    spin_unlock_irqrestore(&card->card_lock, flags);
911
912    tty_wakeup(tty);
913}
914
915static void isicom_shutdown(struct tty_port *port)
916{
917    struct isi_port *ip = container_of(port, struct isi_port, port);
918    struct isi_board *card = ip->card;
919    unsigned long flags;
920
921    /* indicate to the card that no more data can be received
922       on this port */
923    spin_lock_irqsave(&card->card_lock, flags);
924    card->port_status &= ~(1 << ip->channel);
925    outw(card->port_status, card->base + 0x02);
926    isicom_shutdown_port(ip);
927    spin_unlock_irqrestore(&card->card_lock, flags);
928    tty_port_free_xmit_buf(port);
929}
930
931static void isicom_close(struct tty_struct *tty, struct file *filp)
932{
933    struct isi_port *ip = tty->driver_data;
934    struct tty_port *port;
935
936    if (ip == NULL)
937        return;
938
939    port = &ip->port;
940    if (isicom_paranoia_check(ip, tty->name, "isicom_close"))
941        return;
942    tty_port_close(port, tty, filp);
943}
944
945/* write et all */
946static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
947    int count)
948{
949    struct isi_port *port = tty->driver_data;
950    struct isi_board *card = port->card;
951    unsigned long flags;
952    int cnt, total = 0;
953
954    if (isicom_paranoia_check(port, tty->name, "isicom_write"))
955        return 0;
956
957    spin_lock_irqsave(&card->card_lock, flags);
958
959    while (1) {
960        cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt
961                - 1, SERIAL_XMIT_SIZE - port->xmit_head));
962        if (cnt <= 0)
963            break;
964
965        memcpy(port->port.xmit_buf + port->xmit_head, buf, cnt);
966        port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
967            - 1);
968        port->xmit_cnt += cnt;
969        buf += cnt;
970        count -= cnt;
971        total += cnt;
972    }
973    if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
974        port->status |= ISI_TXOK;
975    spin_unlock_irqrestore(&card->card_lock, flags);
976    return total;
977}
978
979/* put_char et all */
980static int isicom_put_char(struct tty_struct *tty, unsigned char ch)
981{
982    struct isi_port *port = tty->driver_data;
983    struct isi_board *card = port->card;
984    unsigned long flags;
985
986    if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
987        return 0;
988
989    spin_lock_irqsave(&card->card_lock, flags);
990    if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
991        spin_unlock_irqrestore(&card->card_lock, flags);
992        return 0;
993    }
994
995    port->port.xmit_buf[port->xmit_head++] = ch;
996    port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
997    port->xmit_cnt++;
998    spin_unlock_irqrestore(&card->card_lock, flags);
999    return 1;
1000}
1001
1002/* flush_chars et all */
1003static void isicom_flush_chars(struct tty_struct *tty)
1004{
1005    struct isi_port *port = tty->driver_data;
1006
1007    if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
1008        return;
1009
1010    if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1011            !port->port.xmit_buf)
1012        return;
1013
1014    /* this tells the transmitter to consider this port for
1015       data output to the card ... that's the best we can do. */
1016    port->status |= ISI_TXOK;
1017}
1018
1019/* write_room et all */
1020static int isicom_write_room(struct tty_struct *tty)
1021{
1022    struct isi_port *port = tty->driver_data;
1023    int free;
1024
1025    if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
1026        return 0;
1027
1028    free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1029    if (free < 0)
1030        free = 0;
1031    return free;
1032}
1033
1034/* chars_in_buffer et all */
1035static int isicom_chars_in_buffer(struct tty_struct *tty)
1036{
1037    struct isi_port *port = tty->driver_data;
1038    if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
1039        return 0;
1040    return port->xmit_cnt;
1041}
1042
1043/* ioctl et all */
1044static int isicom_send_break(struct tty_struct *tty, int length)
1045{
1046    struct isi_port *port = tty->driver_data;
1047    struct isi_board *card = port->card;
1048    unsigned long base = card->base;
1049
1050    if (length == -1)
1051        return -EOPNOTSUPP;
1052
1053    if (!lock_card(card))
1054        return -EINVAL;
1055
1056    outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
1057    outw((length & 0xff) << 8 | 0x00, base);
1058    outw((length & 0xff00), base);
1059    InterruptTheCard(base);
1060
1061    unlock_card(card);
1062    return 0;
1063}
1064
1065static int isicom_tiocmget(struct tty_struct *tty)
1066{
1067    struct isi_port *port = tty->driver_data;
1068    /* just send the port status */
1069    u16 status = port->status;
1070
1071    if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1072        return -ENODEV;
1073
1074    return ((status & ISI_RTS) ? TIOCM_RTS : 0) |
1075        ((status & ISI_DTR) ? TIOCM_DTR : 0) |
1076        ((status & ISI_DCD) ? TIOCM_CAR : 0) |
1077        ((status & ISI_DSR) ? TIOCM_DSR : 0) |
1078        ((status & ISI_CTS) ? TIOCM_CTS : 0) |
1079        ((status & ISI_RI ) ? TIOCM_RI : 0);
1080}
1081
1082static int isicom_tiocmset(struct tty_struct *tty,
1083                    unsigned int set, unsigned int clear)
1084{
1085    struct isi_port *port = tty->driver_data;
1086    unsigned long flags;
1087
1088    if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1089        return -ENODEV;
1090
1091    spin_lock_irqsave(&port->card->card_lock, flags);
1092    if (set & TIOCM_RTS)
1093        raise_rts(port);
1094    if (set & TIOCM_DTR)
1095        raise_dtr(port);
1096
1097    if (clear & TIOCM_RTS)
1098        drop_rts(port);
1099    if (clear & TIOCM_DTR)
1100        drop_dtr(port);
1101    spin_unlock_irqrestore(&port->card->card_lock, flags);
1102
1103    return 0;
1104}
1105
1106static int isicom_set_serial_info(struct tty_struct *tty,
1107                    struct serial_struct __user *info)
1108{
1109    struct isi_port *port = tty->driver_data;
1110    struct serial_struct newinfo;
1111    int reconfig_port;
1112
1113    if (copy_from_user(&newinfo, info, sizeof(newinfo)))
1114        return -EFAULT;
1115
1116    mutex_lock(&port->port.mutex);
1117    reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) !=
1118        (newinfo.flags & ASYNC_SPD_MASK));
1119
1120    if (!capable(CAP_SYS_ADMIN)) {
1121        if ((newinfo.close_delay != port->port.close_delay) ||
1122                (newinfo.closing_wait != port->port.closing_wait) ||
1123                ((newinfo.flags & ~ASYNC_USR_MASK) !=
1124                (port->port.flags & ~ASYNC_USR_MASK))) {
1125            mutex_unlock(&port->port.mutex);
1126            return -EPERM;
1127        }
1128        port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
1129                (newinfo.flags & ASYNC_USR_MASK));
1130    } else {
1131        port->port.close_delay = newinfo.close_delay;
1132        port->port.closing_wait = newinfo.closing_wait;
1133        port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) |
1134                (newinfo.flags & ASYNC_FLAGS));
1135    }
1136    if (reconfig_port) {
1137        unsigned long flags;
1138        spin_lock_irqsave(&port->card->card_lock, flags);
1139        isicom_config_port(tty);
1140        spin_unlock_irqrestore(&port->card->card_lock, flags);
1141    }
1142    mutex_unlock(&port->port.mutex);
1143    return 0;
1144}
1145
1146static int isicom_get_serial_info(struct isi_port *port,
1147    struct serial_struct __user *info)
1148{
1149    struct serial_struct out_info;
1150
1151    mutex_lock(&port->port.mutex);
1152    memset(&out_info, 0, sizeof(out_info));
1153/* out_info.type = ? */
1154    out_info.line = port - isi_ports;
1155    out_info.port = port->card->base;
1156    out_info.irq = port->card->irq;
1157    out_info.flags = port->port.flags;
1158/* out_info.baud_base = ? */
1159    out_info.close_delay = port->port.close_delay;
1160    out_info.closing_wait = port->port.closing_wait;
1161    mutex_unlock(&port->port.mutex);
1162    if (copy_to_user(info, &out_info, sizeof(out_info)))
1163        return -EFAULT;
1164    return 0;
1165}
1166
1167static int isicom_ioctl(struct tty_struct *tty,
1168    unsigned int cmd, unsigned long arg)
1169{
1170    struct isi_port *port = tty->driver_data;
1171    void __user *argp = (void __user *)arg;
1172
1173    if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1174        return -ENODEV;
1175
1176    switch (cmd) {
1177    case TIOCGSERIAL:
1178        return isicom_get_serial_info(port, argp);
1179
1180    case TIOCSSERIAL:
1181        return isicom_set_serial_info(tty, argp);
1182
1183    default:
1184        return -ENOIOCTLCMD;
1185    }
1186    return 0;
1187}
1188
1189/* set_termios et all */
1190static void isicom_set_termios(struct tty_struct *tty,
1191    struct ktermios *old_termios)
1192{
1193    struct isi_port *port = tty->driver_data;
1194    unsigned long flags;
1195
1196    if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
1197        return;
1198
1199    if (tty->termios->c_cflag == old_termios->c_cflag &&
1200            tty->termios->c_iflag == old_termios->c_iflag)
1201        return;
1202
1203    spin_lock_irqsave(&port->card->card_lock, flags);
1204    isicom_config_port(tty);
1205    spin_unlock_irqrestore(&port->card->card_lock, flags);
1206
1207    if ((old_termios->c_cflag & CRTSCTS) &&
1208            !(tty->termios->c_cflag & CRTSCTS)) {
1209        tty->hw_stopped = 0;
1210        isicom_start(tty);
1211    }
1212}
1213
1214/* throttle et all */
1215static void isicom_throttle(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_throttle"))
1221        return;
1222
1223    /* tell the card that this port cannot handle any more data for now */
1224    card->port_status &= ~(1 << port->channel);
1225    outw(card->port_status, card->base + 0x02);
1226}
1227
1228/* unthrottle et all */
1229static void isicom_unthrottle(struct tty_struct *tty)
1230{
1231    struct isi_port *port = tty->driver_data;
1232    struct isi_board *card = port->card;
1233
1234    if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
1235        return;
1236
1237    /* tell the card that this port is ready to accept more data */
1238    card->port_status |= (1 << port->channel);
1239    outw(card->port_status, card->base + 0x02);
1240}
1241
1242/* stop et all */
1243static void isicom_stop(struct tty_struct *tty)
1244{
1245    struct isi_port *port = tty->driver_data;
1246
1247    if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
1248        return;
1249
1250    /* this tells the transmitter not to consider this port for
1251       data output to the card. */
1252    port->status &= ~ISI_TXOK;
1253}
1254
1255/* start et all */
1256static void isicom_start(struct tty_struct *tty)
1257{
1258    struct isi_port *port = tty->driver_data;
1259
1260    if (isicom_paranoia_check(port, tty->name, "isicom_start"))
1261        return;
1262
1263    /* this tells the transmitter to consider this port for
1264       data output to the card. */
1265    port->status |= ISI_TXOK;
1266}
1267
1268static void isicom_hangup(struct tty_struct *tty)
1269{
1270    struct isi_port *port = tty->driver_data;
1271
1272    if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
1273        return;
1274    tty_port_hangup(&port->port);
1275}
1276
1277
1278/*
1279 * Driver init and deinit functions
1280 */
1281
1282static const struct tty_operations isicom_ops = {
1283    .open = isicom_open,
1284    .close = isicom_close,
1285    .write = isicom_write,
1286    .put_char = isicom_put_char,
1287    .flush_chars = isicom_flush_chars,
1288    .write_room = isicom_write_room,
1289    .chars_in_buffer = isicom_chars_in_buffer,
1290    .ioctl = isicom_ioctl,
1291    .set_termios = isicom_set_termios,
1292    .throttle = isicom_throttle,
1293    .unthrottle = isicom_unthrottle,
1294    .stop = isicom_stop,
1295    .start = isicom_start,
1296    .hangup = isicom_hangup,
1297    .flush_buffer = isicom_flush_buffer,
1298    .tiocmget = isicom_tiocmget,
1299    .tiocmset = isicom_tiocmset,
1300    .break_ctl = isicom_send_break,
1301};
1302
1303static const struct tty_port_operations isicom_port_ops = {
1304    .carrier_raised = isicom_carrier_raised,
1305    .dtr_rts = isicom_dtr_rts,
1306    .activate = isicom_activate,
1307    .shutdown = isicom_shutdown,
1308};
1309
1310static int __devinit reset_card(struct pci_dev *pdev,
1311    const unsigned int card, unsigned int *signature)
1312{
1313    struct isi_board *board = pci_get_drvdata(pdev);
1314    unsigned long base = board->base;
1315    unsigned int sig, portcount = 0;
1316    int retval = 0;
1317
1318    dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1,
1319        base);
1320
1321    inw(base + 0x8);
1322
1323    msleep(10);
1324
1325    outw(0, base + 0x8); /* Reset */
1326
1327    msleep(1000);
1328
1329    sig = inw(base + 0x4) & 0xff;
1330
1331    if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd &&
1332            sig != 0xee) {
1333        dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible "
1334            "bad I/O Port Address 0x%lx).\n", card + 1, base);
1335        dev_dbg(&pdev->dev, "Sig=0x%x\n", sig);
1336        retval = -EIO;
1337        goto end;
1338    }
1339
1340    msleep(10);
1341
1342    portcount = inw(base + 0x2);
1343    if (!(inw(base + 0xe) & 0x1) || (portcount != 0 && portcount != 4 &&
1344                portcount != 8 && portcount != 16)) {
1345        dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.\n",
1346            card + 1);
1347        retval = -EIO;
1348        goto end;
1349    }
1350
1351    switch (sig) {
1352    case 0xa5:
1353    case 0xbb:
1354    case 0xdd:
1355        board->port_count = (portcount == 4) ? 4 : 8;
1356        board->shift_count = 12;
1357        break;
1358    case 0xcc:
1359    case 0xee:
1360        board->port_count = 16;
1361        board->shift_count = 11;
1362        break;
1363    }
1364    dev_info(&pdev->dev, "-Done\n");
1365    *signature = sig;
1366
1367end:
1368    return retval;
1369}
1370
1371static int __devinit load_firmware(struct pci_dev *pdev,
1372    const unsigned int index, const unsigned int signature)
1373{
1374    struct isi_board *board = pci_get_drvdata(pdev);
1375    const struct firmware *fw;
1376    unsigned long base = board->base;
1377    unsigned int a;
1378    u16 word_count, status;
1379    int retval = -EIO;
1380    char *name;
1381    u8 *data;
1382
1383    struct stframe {
1384        u16 addr;
1385        u16 count;
1386        u8 data[0];
1387    } *frame;
1388
1389    switch (signature) {
1390    case 0xa5:
1391        name = "isi608.bin";
1392        break;
1393    case 0xbb:
1394        name = "isi608em.bin";
1395        break;
1396    case 0xcc:
1397        name = "isi616em.bin";
1398        break;
1399    case 0xdd:
1400        name = "isi4608.bin";
1401        break;
1402    case 0xee:
1403        name = "isi4616.bin";
1404        break;
1405    default:
1406        dev_err(&pdev->dev, "Unknown signature.\n");
1407        goto end;
1408    }
1409
1410    retval = request_firmware(&fw, name, &pdev->dev);
1411    if (retval)
1412        goto end;
1413
1414    retval = -EIO;
1415
1416    for (frame = (struct stframe *)fw->data;
1417            frame < (struct stframe *)(fw->data + fw->size);
1418            frame = (struct stframe *)((u8 *)(frame + 1) +
1419                frame->count)) {
1420        if (WaitTillCardIsFree(base))
1421            goto errrelfw;
1422
1423        outw(0xf0, base); /* start upload sequence */
1424        outw(0x00, base);
1425        outw(frame->addr, base); /* lsb of address */
1426
1427        word_count = frame->count / 2 + frame->count % 2;
1428        outw(word_count, base);
1429        InterruptTheCard(base);
1430
1431        udelay(100); /* 0x2f */
1432
1433        if (WaitTillCardIsFree(base))
1434            goto errrelfw;
1435
1436        status = inw(base + 0x4);
1437        if (status != 0) {
1438            dev_warn(&pdev->dev, "Card%d rejected load header:\n"
1439                 "Address:0x%x\n"
1440                 "Count:0x%x\n"
1441                 "Status:0x%x\n",
1442                 index + 1, frame->addr, frame->count, status);
1443            goto errrelfw;
1444        }
1445        outsw(base, frame->data, word_count);
1446
1447        InterruptTheCard(base);
1448
1449        udelay(50); /* 0x0f */
1450
1451        if (WaitTillCardIsFree(base))
1452            goto errrelfw;
1453
1454        status = inw(base + 0x4);
1455        if (status != 0) {
1456            dev_err(&pdev->dev, "Card%d got out of sync.Card "
1457                "Status:0x%x\n", index + 1, status);
1458            goto errrelfw;
1459        }
1460    }
1461
1462/* XXX: should we test it by reading it back and comparing with original like
1463 * in load firmware package? */
1464    for (frame = (struct stframe *)fw->data;
1465            frame < (struct stframe *)(fw->data + fw->size);
1466            frame = (struct stframe *)((u8 *)(frame + 1) +
1467                frame->count)) {
1468        if (WaitTillCardIsFree(base))
1469            goto errrelfw;
1470
1471        outw(0xf1, base); /* start download sequence */
1472        outw(0x00, base);
1473        outw(frame->addr, base); /* lsb of address */
1474
1475        word_count = (frame->count >> 1) + frame->count % 2;
1476        outw(word_count + 1, base);
1477        InterruptTheCard(base);
1478
1479        udelay(50); /* 0xf */
1480
1481        if (WaitTillCardIsFree(base))
1482            goto errrelfw;
1483
1484        status = inw(base + 0x4);
1485        if (status != 0) {
1486            dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
1487                 "Address:0x%x\n"
1488                 "Count:0x%x\n"
1489                 "Status: 0x%x\n",
1490                 index + 1, frame->addr, frame->count, status);
1491            goto errrelfw;
1492        }
1493
1494        data = kmalloc(word_count * 2, GFP_KERNEL);
1495        if (data == NULL) {
1496            dev_err(&pdev->dev, "Card%d, firmware upload "
1497                "failed, not enough memory\n", index + 1);
1498            goto errrelfw;
1499        }
1500        inw(base);
1501        insw(base, data, word_count);
1502        InterruptTheCard(base);
1503
1504        for (a = 0; a < frame->count; a++)
1505            if (data[a] != frame->data[a]) {
1506                kfree(data);
1507                dev_err(&pdev->dev, "Card%d, firmware upload "
1508                    "failed\n", index + 1);
1509                goto errrelfw;
1510            }
1511        kfree(data);
1512
1513        udelay(50); /* 0xf */
1514
1515        if (WaitTillCardIsFree(base))
1516            goto errrelfw;
1517
1518        status = inw(base + 0x4);
1519        if (status != 0) {
1520            dev_err(&pdev->dev, "Card%d verify got out of sync. "
1521                "Card Status:0x%x\n", index + 1, status);
1522            goto errrelfw;
1523        }
1524    }
1525
1526    /* xfer ctrl */
1527    if (WaitTillCardIsFree(base))
1528        goto errrelfw;
1529
1530    outw(0xf2, base);
1531    outw(0x800, base);
1532    outw(0x0, base);
1533    outw(0x0, base);
1534    InterruptTheCard(base);
1535    outw(0x0, base + 0x4); /* for ISI4608 cards */
1536
1537    board->status |= FIRMWARE_LOADED;
1538    retval = 0;
1539
1540errrelfw:
1541    release_firmware(fw);
1542end:
1543    return retval;
1544}
1545
1546/*
1547 * Insmod can set static symbols so keep these static
1548 */
1549static unsigned int card_count;
1550
1551static int __devinit isicom_probe(struct pci_dev *pdev,
1552    const struct pci_device_id *ent)
1553{
1554    unsigned int uninitialized_var(signature), index;
1555    int retval = -EPERM;
1556    struct isi_board *board = NULL;
1557
1558    if (card_count >= BOARD_COUNT)
1559        goto err;
1560
1561    retval = pci_enable_device(pdev);
1562    if (retval) {
1563        dev_err(&pdev->dev, "failed to enable\n");
1564        goto err;
1565    }
1566
1567    dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
1568
1569    /* allot the first empty slot in the array */
1570    for (index = 0; index < BOARD_COUNT; index++) {
1571        if (isi_card[index].base == 0) {
1572            board = &isi_card[index];
1573            break;
1574        }
1575    }
1576    if (index == BOARD_COUNT) {
1577        retval = -ENODEV;
1578        goto err_disable;
1579    }
1580
1581    board->index = index;
1582    board->base = pci_resource_start(pdev, 3);
1583    board->irq = pdev->irq;
1584    card_count++;
1585
1586    pci_set_drvdata(pdev, board);
1587
1588    retval = pci_request_region(pdev, 3, ISICOM_NAME);
1589    if (retval) {
1590        dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d "
1591            "will be disabled.\n", board->base, board->base + 15,
1592            index + 1);
1593        retval = -EBUSY;
1594        goto errdec;
1595    }
1596
1597    retval = request_irq(board->irq, isicom_interrupt,
1598            IRQF_SHARED, ISICOM_NAME, board);
1599    if (retval < 0) {
1600        dev_err(&pdev->dev, "Could not install handler at Irq %d. "
1601            "Card%d will be disabled.\n", board->irq, index + 1);
1602        goto errunrr;
1603    }
1604
1605    retval = reset_card(pdev, index, &signature);
1606    if (retval < 0)
1607        goto errunri;
1608
1609    retval = load_firmware(pdev, index, signature);
1610    if (retval < 0)
1611        goto errunri;
1612
1613    for (index = 0; index < board->port_count; index++)
1614        tty_register_device(isicom_normal, board->index * 16 + index,
1615                &pdev->dev);
1616
1617    return 0;
1618
1619errunri:
1620    free_irq(board->irq, board);
1621errunrr:
1622    pci_release_region(pdev, 3);
1623errdec:
1624    board->base = 0;
1625    card_count--;
1626err_disable:
1627    pci_disable_device(pdev);
1628err:
1629    return retval;
1630}
1631
1632static void __devexit isicom_remove(struct pci_dev *pdev)
1633{
1634    struct isi_board *board = pci_get_drvdata(pdev);
1635    unsigned int i;
1636
1637    for (i = 0; i < board->port_count; i++)
1638        tty_unregister_device(isicom_normal, board->index * 16 + i);
1639
1640    free_irq(board->irq, board);
1641    pci_release_region(pdev, 3);
1642    board->base = 0;
1643    card_count--;
1644    pci_disable_device(pdev);
1645}
1646
1647static int __init isicom_init(void)
1648{
1649    int retval, idx, channel;
1650    struct isi_port *port;
1651
1652    for (idx = 0; idx < BOARD_COUNT; idx++) {
1653        port = &isi_ports[idx * 16];
1654        isi_card[idx].ports = port;
1655        spin_lock_init(&isi_card[idx].card_lock);
1656        for (channel = 0; channel < 16; channel++, port++) {
1657            tty_port_init(&port->port);
1658            port->port.ops = &isicom_port_ops;
1659            port->magic = ISICOM_MAGIC;
1660            port->card = &isi_card[idx];
1661            port->channel = channel;
1662            port->port.close_delay = 50 * HZ/100;
1663            port->port.closing_wait = 3000 * HZ/100;
1664            port->status = 0;
1665            /* . . . */
1666        }
1667        isi_card[idx].base = 0;
1668        isi_card[idx].irq = 0;
1669    }
1670
1671    /* tty driver structure initialization */
1672    isicom_normal = alloc_tty_driver(PORT_COUNT);
1673    if (!isicom_normal) {
1674        retval = -ENOMEM;
1675        goto error;
1676    }
1677
1678    isicom_normal->name = "ttyM";
1679    isicom_normal->major = ISICOM_NMAJOR;
1680    isicom_normal->minor_start = 0;
1681    isicom_normal->type = TTY_DRIVER_TYPE_SERIAL;
1682    isicom_normal->subtype = SERIAL_TYPE_NORMAL;
1683    isicom_normal->init_termios = tty_std_termios;
1684    isicom_normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL |
1685        CLOCAL;
1686    isicom_normal->flags = TTY_DRIVER_REAL_RAW |
1687        TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK;
1688    tty_set_operations(isicom_normal, &isicom_ops);
1689
1690    retval = tty_register_driver(isicom_normal);
1691    if (retval) {
1692        pr_debug("Couldn't register the dialin driver\n");
1693        goto err_puttty;
1694    }
1695
1696    retval = pci_register_driver(&isicom_driver);
1697    if (retval < 0) {
1698        pr_err("Unable to register pci driver.\n");
1699        goto err_unrtty;
1700    }
1701
1702    mod_timer(&tx, jiffies + 1);
1703
1704    return 0;
1705err_unrtty:
1706    tty_unregister_driver(isicom_normal);
1707err_puttty:
1708    put_tty_driver(isicom_normal);
1709error:
1710    return retval;
1711}
1712
1713static void __exit isicom_exit(void)
1714{
1715    del_timer_sync(&tx);
1716
1717    pci_unregister_driver(&isicom_driver);
1718    tty_unregister_driver(isicom_normal);
1719    put_tty_driver(isicom_normal);
1720}
1721
1722module_init(isicom_init);
1723module_exit(isicom_exit);
1724
1725MODULE_AUTHOR("MultiTech");
1726MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
1727MODULE_LICENSE("GPL");
1728MODULE_FIRMWARE("isi608.bin");
1729MODULE_FIRMWARE("isi608em.bin");
1730MODULE_FIRMWARE("isi616em.bin");
1731MODULE_FIRMWARE("isi4608.bin");
1732MODULE_FIRMWARE("isi4616.bin");
1733

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