2 * specialix.c -- specialix IO8+ multiport serial driver.
4 * Copyright (C) 1997 Roger Wolff (R.E.Wolff@BitWizard.nl)
5 * Copyright (C) 1994-1996 Dmitry Gorodchanin (pgmdsg@ibi.com)
7 * Specialix pays for the development and support of this driver.
8 * Please DO contact io8-linux@specialix.co.uk if you require
9 * support. But please read the documentation (specialix.txt)
12 * This driver was developped in the BitWizard linux device
13 * driver service. If you require a linux device driver for your
14 * product, please contact devices@BitWizard.nl for a quote.
16 * This code is firmly based on the riscom/8 serial driver,
17 * written by Dmitry Gorodchanin. The specialix IO8+ card
18 * programming information was obtained from the CL-CD1865 Data
19 * Book, and Specialix document number 6200059: IO8+ Hardware
20 * Functional Specification.
22 * This program is free software; you can redistribute it and/or
23 * modify it under the terms of the GNU General Public License as
24 * published by the Free Software Foundation; either version 2 of
25 * the License, or (at your option) any later version.
27 * This program is distributed in the hope that it will be
28 * useful, but WITHOUT ANY WARRANTY; without even the implied
29 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
30 * PURPOSE. See the GNU General Public License for more details.
32 * You should have received a copy of the GNU General Public
33 * License along with this program; if not, write to the Free
34 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
39 * Revision 1.0: April 1st 1997.
40 * Initial release for alpha testing.
41 * Revision 1.1: April 14th 1997.
42 * Incorporated Richard Hudsons suggestions,
43 * removed some debugging printk's.
44 * Revision 1.2: April 15th 1997.
45 * Ported to 2.1.x kernels.
46 * Revision 1.3: April 17th 1997
47 * Backported to 2.0. (Compatibility macros).
48 * Revision 1.4: April 18th 1997
49 * Fixed DTR/RTS bug that caused the card to indicate
50 * "don't send data" to a modem after the password prompt.
51 * Fixed bug for premature (fake) interrupts.
52 * Revision 1.5: April 19th 1997
53 * fixed a minor typo in the header file, cleanup a little.
54 * performance warnings are now MAXed at once per minute.
55 * Revision 1.6: May 23 1997
56 * Changed the specialix=... format to include interrupt.
57 * Revision 1.7: May 27 1997
58 * Made many more debug printk's a compile time option.
59 * Revision 1.8: Jul 1 1997
60 * port to linux-2.1.43 kernel.
61 * Revision 1.9: Oct 9 1998
62 * Added stuff for the IO8+/PCI version.
63 * Revision 1.10: Oct 22 1999 / Jan 21 2000.
64 * Added stuff for setserial.
65 * Nicolas Mailhot (Nicolas.Mailhot@email.enst.fr)
69 #define VERSION "1.11"
73 * There is a bunch of documentation about the card, jumpers, config
74 * settings, restrictions, cables, device names and numbers in
75 * Documentation/serial/specialix.txt
78 #include <linux/module.h>
81 #include <linux/kernel.h>
82 #include <linux/sched.h>
83 #include <linux/ioport.h>
84 #include <linux/interrupt.h>
85 #include <linux/errno.h>
86 #include <linux/tty.h>
87 #include <linux/tty_flip.h>
89 #include <linux/serial.h>
90 #include <linux/smp_lock.h>
91 #include <linux/fcntl.h>
92 #include <linux/major.h>
93 #include <linux/delay.h>
94 #include <linux/pci.h>
95 #include <linux/init.h>
96 #include <linux/uaccess.h>
97 #include <linux/gfp.h>
99 #include "specialix_io8.h"
104 This driver can spew a whole lot of debugging output at you. If you
105 need maximum performance, you should disable the DEBUG define. To
106 aid in debugging in the field, I'm leaving the compile-time debug
107 features enabled, and disable them "runtime". That allows me to
108 instruct people with problems to enable debugging without requiring
114 static int sx_rxfifo
= SPECIALIX_RXFIFO
;
115 static int sx_rtscts
;
118 #define dprintk(f, str...) if (sx_debug & f) printk(str)
120 #define dprintk(f, str...) /* nothing */
123 #define SX_DEBUG_FLOW 0x0001
124 #define SX_DEBUG_DATA 0x0002
125 #define SX_DEBUG_PROBE 0x0004
126 #define SX_DEBUG_CHAN 0x0008
127 #define SX_DEBUG_INIT 0x0010
128 #define SX_DEBUG_RX 0x0020
129 #define SX_DEBUG_TX 0x0040
130 #define SX_DEBUG_IRQ 0x0080
131 #define SX_DEBUG_OPEN 0x0100
132 #define SX_DEBUG_TERMIOS 0x0200
133 #define SX_DEBUG_SIGNALS 0x0400
134 #define SX_DEBUG_FIFO 0x0800
137 #define func_enter() dprintk(SX_DEBUG_FLOW, "io8: enter %s\n", __func__)
138 #define func_exit() dprintk(SX_DEBUG_FLOW, "io8: exit %s\n", __func__)
141 /* Configurable options: */
143 /* Am I paranoid or not ? ;-) */
144 #define SPECIALIX_PARANOIA_CHECK
147 * The following defines are mostly for testing purposes. But if you need
148 * some nice reporting in your syslog, you can define them also.
150 #undef SX_REPORT_FIFO
151 #undef SX_REPORT_OVERRUN
156 #define SPECIALIX_LEGAL_FLAGS \
157 (ASYNC_HUP_NOTIFY | ASYNC_SAK | ASYNC_SPLIT_TERMIOS | \
158 ASYNC_SPD_HI | ASYNC_SPEED_VHI | ASYNC_SESSION_LOCKOUT | \
159 ASYNC_PGRP_LOCKOUT | ASYNC_CALLOUT_NOHUP)
161 static struct tty_driver
*specialix_driver
;
163 static struct specialix_board sx_board
[SX_NBOARD
] = {
164 { 0, SX_IOBASE1
, 9, },
165 { 0, SX_IOBASE2
, 11, },
166 { 0, SX_IOBASE3
, 12, },
167 { 0, SX_IOBASE4
, 15, },
170 static struct specialix_port sx_port
[SX_NBOARD
* SX_NPORT
];
173 static int sx_paranoia_check(struct specialix_port
const *port
,
174 char *name
, const char *routine
)
176 #ifdef SPECIALIX_PARANOIA_CHECK
177 static const char *badmagic
= KERN_ERR
178 "sx: Warning: bad specialix port magic number for device %s in %s\n";
179 static const char *badinfo
= KERN_ERR
180 "sx: Warning: null specialix port for device %s in %s\n";
183 printk(badinfo
, name
, routine
);
186 if (port
->magic
!= SPECIALIX_MAGIC
) {
187 printk(badmagic
, name
, routine
);
197 * Service functions for specialix IO8+ driver.
201 /* Get board number from pointer */
202 static inline int board_No(struct specialix_board
*bp
)
204 return bp
- sx_board
;
208 /* Get port number from pointer */
209 static inline int port_No(struct specialix_port
const *port
)
211 return SX_PORT(port
- sx_port
);
215 /* Get pointer to board from pointer to port */
216 static inline struct specialix_board
*port_Board(
217 struct specialix_port
const *port
)
219 return &sx_board
[SX_BOARD(port
- sx_port
)];
223 /* Input Byte from CL CD186x register */
224 static inline unsigned char sx_in(struct specialix_board
*bp
,
227 bp
->reg
= reg
| 0x80;
228 outb(reg
| 0x80, bp
->base
+ SX_ADDR_REG
);
229 return inb(bp
->base
+ SX_DATA_REG
);
233 /* Output Byte to CL CD186x register */
234 static inline void sx_out(struct specialix_board
*bp
, unsigned short reg
,
237 bp
->reg
= reg
| 0x80;
238 outb(reg
| 0x80, bp
->base
+ SX_ADDR_REG
);
239 outb(val
, bp
->base
+ SX_DATA_REG
);
243 /* Input Byte from CL CD186x register */
244 static inline unsigned char sx_in_off(struct specialix_board
*bp
,
248 outb(reg
, bp
->base
+ SX_ADDR_REG
);
249 return inb(bp
->base
+ SX_DATA_REG
);
253 /* Output Byte to CL CD186x register */
254 static inline void sx_out_off(struct specialix_board
*bp
,
255 unsigned short reg
, unsigned char val
)
258 outb(reg
, bp
->base
+ SX_ADDR_REG
);
259 outb(val
, bp
->base
+ SX_DATA_REG
);
263 /* Wait for Channel Command Register ready */
264 static void sx_wait_CCR(struct specialix_board
*bp
)
266 unsigned long delay
, flags
;
269 for (delay
= SX_CCR_TIMEOUT
; delay
; delay
--) {
270 spin_lock_irqsave(&bp
->lock
, flags
);
271 ccr
= sx_in(bp
, CD186x_CCR
);
272 spin_unlock_irqrestore(&bp
->lock
, flags
);
278 printk(KERN_ERR
"sx%d: Timeout waiting for CCR.\n", board_No(bp
));
282 /* Wait for Channel Command Register ready */
283 static void sx_wait_CCR_off(struct specialix_board
*bp
)
289 for (delay
= SX_CCR_TIMEOUT
; delay
; delay
--) {
290 spin_lock_irqsave(&bp
->lock
, flags
);
291 crr
= sx_in_off(bp
, CD186x_CCR
);
292 spin_unlock_irqrestore(&bp
->lock
, flags
);
298 printk(KERN_ERR
"sx%d: Timeout waiting for CCR.\n", board_No(bp
));
303 * specialix IO8+ IO range functions.
306 static int sx_request_io_range(struct specialix_board
*bp
)
308 return request_region(bp
->base
,
309 bp
->flags
& SX_BOARD_IS_PCI
? SX_PCI_IO_SPACE
: SX_IO_SPACE
,
310 "specialix IO8+") == NULL
;
314 static void sx_release_io_range(struct specialix_board
*bp
)
316 release_region(bp
->base
, bp
->flags
& SX_BOARD_IS_PCI
?
317 SX_PCI_IO_SPACE
: SX_IO_SPACE
);
321 /* Set the IRQ using the RTS lines that run to the PAL on the board.... */
322 static int sx_set_irq(struct specialix_board
*bp
)
328 if (bp
->flags
& SX_BOARD_IS_PCI
)
331 /* In the same order as in the docs... */
344 default:printk(KERN_ERR
345 "Speclialix: cannot set irq to %d.\n", bp
->irq
);
348 spin_lock_irqsave(&bp
->lock
, flags
);
349 for (i
= 0; i
< 2; i
++) {
350 sx_out(bp
, CD186x_CAR
, i
);
351 sx_out(bp
, CD186x_MSVRTS
, ((virq
>> i
) & 0x1)? MSVR_RTS
:0);
353 spin_unlock_irqrestore(&bp
->lock
, flags
);
358 /* Reset and setup CD186x chip */
359 static int sx_init_CD186x(struct specialix_board
*bp
)
366 sx_wait_CCR_off(bp
); /* Wait for CCR ready */
367 spin_lock_irqsave(&bp
->lock
, flags
);
368 sx_out_off(bp
, CD186x_CCR
, CCR_HARDRESET
); /* Reset CD186x chip */
369 spin_unlock_irqrestore(&bp
->lock
, flags
);
370 msleep(50); /* Delay 0.05 sec */
371 spin_lock_irqsave(&bp
->lock
, flags
);
372 sx_out_off(bp
, CD186x_GIVR
, SX_ID
); /* Set ID for this chip */
373 sx_out_off(bp
, CD186x_GICR
, 0); /* Clear all bits */
374 sx_out_off(bp
, CD186x_PILR1
, SX_ACK_MINT
); /* Prio for modem intr */
375 sx_out_off(bp
, CD186x_PILR2
, SX_ACK_TINT
); /* Prio for transmitter intr */
376 sx_out_off(bp
, CD186x_PILR3
, SX_ACK_RINT
); /* Prio for receiver intr */
378 sx_out_off(bp
, CD186x_SRCR
, sx_in(bp
, CD186x_SRCR
) | SRCR_REGACKEN
);
380 /* Setting up prescaler. We need 4 ticks per 1 ms */
381 scaler
= SX_OSCFREQ
/SPECIALIX_TPS
;
383 sx_out_off(bp
, CD186x_PPRH
, scaler
>> 8);
384 sx_out_off(bp
, CD186x_PPRL
, scaler
& 0xff);
385 spin_unlock_irqrestore(&bp
->lock
, flags
);
387 if (!sx_set_irq(bp
)) {
388 /* Figure out how to pass this along... */
389 printk(KERN_ERR
"Cannot set irq to %d.\n", bp
->irq
);
398 static int read_cross_byte(struct specialix_board
*bp
, int reg
, int bit
)
404 spin_lock_irqsave(&bp
->lock
, flags
);
405 for (i
= 0, t
= 0; i
< 8; i
++) {
406 sx_out_off(bp
, CD186x_CAR
, i
);
407 if (sx_in_off(bp
, reg
) & bit
)
410 spin_unlock_irqrestore(&bp
->lock
, flags
);
416 /* Main probing routine, also sets irq. */
417 static int sx_probe(struct specialix_board
*bp
)
419 unsigned char val1
, val2
;
425 if (sx_request_io_range(bp
)) {
430 /* Are the I/O ports here ? */
431 sx_out_off(bp
, CD186x_PPRL
, 0x5a);
433 val1
= sx_in_off(bp
, CD186x_PPRL
);
435 sx_out_off(bp
, CD186x_PPRL
, 0xa5);
437 val2
= sx_in_off(bp
, CD186x_PPRL
);
440 if (val1
!= 0x5a || val2
!= 0xa5) {
442 "sx%d: specialix IO8+ Board at 0x%03x not found.\n",
443 board_No(bp
), bp
->base
);
444 sx_release_io_range(bp
);
449 /* Check the DSR lines that Specialix uses as board
451 val1
= read_cross_byte(bp
, CD186x_MSVR
, MSVR_DSR
);
452 val2
= read_cross_byte(bp
, CD186x_MSVR
, MSVR_RTS
);
453 dprintk(SX_DEBUG_INIT
,
454 "sx%d: DSR lines are: %02x, rts lines are: %02x\n",
455 board_No(bp
), val1
, val2
);
457 /* They managed to switch the bit order between the docs and
458 the IO8+ card. The new PCI card now conforms to old docs.
459 They changed the PCI docs to reflect the situation on the
461 val2
= (bp
->flags
& SX_BOARD_IS_PCI
)?0x4d : 0xb2;
464 "sx%d: specialix IO8+ ID %02x at 0x%03x not found (%02x).\n",
465 board_No(bp
), val2
, bp
->base
, val1
);
466 sx_release_io_range(bp
);
472 /* Reset CD186x again */
473 if (!sx_init_CD186x(bp
)) {
474 sx_release_io_range(bp
);
479 sx_request_io_range(bp
);
480 bp
->flags
|= SX_BOARD_PRESENT
;
482 /* Chip revcode pkgtype
487 CD1865 rev A 0x83 1 -- Do not use!!! Does not work.
489 -- Thanks to Gwen Wang, Cirrus Logic.
492 switch (sx_in_off(bp
, CD186x_GFRCR
)) {
508 break; /* Does not exist at this time */
514 dprintk(SX_DEBUG_INIT
, " GFCR = 0x%02x\n", sx_in_off(bp
, CD186x_GFRCR
));
517 "sx%d: specialix IO8+ board detected at 0x%03x, IRQ %d, CD%d Rev. %c.\n",
518 board_No(bp
), bp
->base
, bp
->irq
, chip
, rev
);
526 * Interrupt processing routines.
529 static struct specialix_port
*sx_get_port(struct specialix_board
*bp
,
530 unsigned char const *what
)
532 unsigned char channel
;
533 struct specialix_port
*port
= NULL
;
535 channel
= sx_in(bp
, CD186x_GICR
) >> GICR_CHAN_OFF
;
536 dprintk(SX_DEBUG_CHAN
, "channel: %d\n", channel
);
537 if (channel
< CD186x_NCH
) {
538 port
= &sx_port
[board_No(bp
) * SX_NPORT
+ channel
];
539 dprintk(SX_DEBUG_CHAN
, "port: %d %p flags: 0x%lx\n",
540 board_No(bp
) * SX_NPORT
+ channel
, port
,
541 port
->port
.flags
& ASYNC_INITIALIZED
);
543 if (port
->port
.flags
& ASYNC_INITIALIZED
) {
544 dprintk(SX_DEBUG_CHAN
, "port: %d %p\n", channel
, port
);
549 printk(KERN_INFO
"sx%d: %s interrupt from invalid port %d\n",
550 board_No(bp
), what
, channel
);
555 static void sx_receive_exc(struct specialix_board
*bp
)
557 struct specialix_port
*port
;
558 struct tty_struct
*tty
;
559 unsigned char status
;
560 unsigned char ch
, flag
;
564 port
= sx_get_port(bp
, "Receive");
566 dprintk(SX_DEBUG_RX
, "Hmm, couldn't find port.\n");
570 tty
= port
->port
.tty
;
572 status
= sx_in(bp
, CD186x_RCSR
);
574 dprintk(SX_DEBUG_RX
, "status: 0x%x\n", status
);
575 if (status
& RCSR_OE
) {
577 dprintk(SX_DEBUG_FIFO
,
578 "sx%d: port %d: Overrun. Total %ld overruns.\n",
579 board_No(bp
), port_No(port
), port
->overrun
);
581 status
&= port
->mark_mask
;
583 /* This flip buffer check needs to be below the reading of the
584 status register to reset the chip's IRQ.... */
585 if (tty_buffer_request_room(tty
, 1) == 0) {
586 dprintk(SX_DEBUG_FIFO
,
587 "sx%d: port %d: Working around flip buffer overflow.\n",
588 board_No(bp
), port_No(port
));
593 ch
= sx_in(bp
, CD186x_RDR
);
598 if (status
& RCSR_TOUT
) {
600 "sx%d: port %d: Receiver timeout. Hardware problems ?\n",
601 board_No(bp
), port_No(port
));
605 } else if (status
& RCSR_BREAK
) {
606 dprintk(SX_DEBUG_RX
, "sx%d: port %d: Handling break...\n",
607 board_No(bp
), port_No(port
));
609 if (port
->port
.flags
& ASYNC_SAK
)
612 } else if (status
& RCSR_PE
)
615 else if (status
& RCSR_FE
)
618 else if (status
& RCSR_OE
)
624 if (tty_insert_flip_char(tty
, ch
, flag
))
625 tty_flip_buffer_push(tty
);
630 static void sx_receive(struct specialix_board
*bp
)
632 struct specialix_port
*port
;
633 struct tty_struct
*tty
;
638 port
= sx_get_port(bp
, "Receive");
640 dprintk(SX_DEBUG_RX
, "Hmm, couldn't find port.\n");
644 tty
= port
->port
.tty
;
646 count
= sx_in(bp
, CD186x_RDCR
);
647 dprintk(SX_DEBUG_RX
, "port: %p: count: %d\n", port
, count
);
648 port
->hits
[count
> 8 ? 9 : count
]++;
651 tty_insert_flip_char(tty
, sx_in(bp
, CD186x_RDR
), TTY_NORMAL
);
652 tty_flip_buffer_push(tty
);
657 static void sx_transmit(struct specialix_board
*bp
)
659 struct specialix_port
*port
;
660 struct tty_struct
*tty
;
664 port
= sx_get_port(bp
, "Transmit");
669 dprintk(SX_DEBUG_TX
, "port: %p\n", port
);
670 tty
= port
->port
.tty
;
672 if (port
->IER
& IER_TXEMPTY
) {
674 sx_out(bp
, CD186x_CAR
, port_No(port
));
675 port
->IER
&= ~IER_TXEMPTY
;
676 sx_out(bp
, CD186x_IER
, port
->IER
);
681 if ((port
->xmit_cnt
<= 0 && !port
->break_length
)
682 || tty
->stopped
|| tty
->hw_stopped
) {
683 sx_out(bp
, CD186x_CAR
, port_No(port
));
684 port
->IER
&= ~IER_TXRDY
;
685 sx_out(bp
, CD186x_IER
, port
->IER
);
690 if (port
->break_length
) {
691 if (port
->break_length
> 0) {
692 if (port
->COR2
& COR2_ETC
) {
693 sx_out(bp
, CD186x_TDR
, CD186x_C_ESC
);
694 sx_out(bp
, CD186x_TDR
, CD186x_C_SBRK
);
695 port
->COR2
&= ~COR2_ETC
;
697 count
= min_t(int, port
->break_length
, 0xff);
698 sx_out(bp
, CD186x_TDR
, CD186x_C_ESC
);
699 sx_out(bp
, CD186x_TDR
, CD186x_C_DELAY
);
700 sx_out(bp
, CD186x_TDR
, count
);
701 port
->break_length
-= count
;
702 if (port
->break_length
== 0)
703 port
->break_length
--;
705 sx_out(bp
, CD186x_TDR
, CD186x_C_ESC
);
706 sx_out(bp
, CD186x_TDR
, CD186x_C_EBRK
);
707 sx_out(bp
, CD186x_COR2
, port
->COR2
);
709 sx_out(bp
, CD186x_CCR
, CCR_CORCHG2
);
710 port
->break_length
= 0;
717 count
= CD186x_NFIFO
;
719 sx_out(bp
, CD186x_TDR
, port
->xmit_buf
[port
->xmit_tail
++]);
720 port
->xmit_tail
= port
->xmit_tail
& (SERIAL_XMIT_SIZE
-1);
721 if (--port
->xmit_cnt
<= 0)
723 } while (--count
> 0);
725 if (port
->xmit_cnt
<= 0) {
726 sx_out(bp
, CD186x_CAR
, port_No(port
));
727 port
->IER
&= ~IER_TXRDY
;
728 sx_out(bp
, CD186x_IER
, port
->IER
);
730 if (port
->xmit_cnt
<= port
->wakeup_chars
)
737 static void sx_check_modem(struct specialix_board
*bp
)
739 struct specialix_port
*port
;
740 struct tty_struct
*tty
;
744 dprintk(SX_DEBUG_SIGNALS
, "Modem intr. ");
745 port
= sx_get_port(bp
, "Modem");
749 tty
= port
->port
.tty
;
751 mcr
= sx_in(bp
, CD186x_MCR
);
753 if ((mcr
& MCR_CDCHG
)) {
754 dprintk(SX_DEBUG_SIGNALS
, "CD just changed... ");
755 msvr_cd
= sx_in(bp
, CD186x_MSVR
) & MSVR_CD
;
757 dprintk(SX_DEBUG_SIGNALS
, "Waking up guys in open.\n");
758 wake_up_interruptible(&port
->port
.open_wait
);
760 dprintk(SX_DEBUG_SIGNALS
, "Sending HUP.\n");
765 #ifdef SPECIALIX_BRAIN_DAMAGED_CTS
766 if (mcr
& MCR_CTSCHG
) {
767 if (sx_in(bp
, CD186x_MSVR
) & MSVR_CTS
) {
769 port
->IER
|= IER_TXRDY
;
770 if (port
->xmit_cnt
<= port
->wakeup_chars
)
774 port
->IER
&= ~IER_TXRDY
;
776 sx_out(bp
, CD186x_IER
, port
->IER
);
778 if (mcr
& MCR_DSSXHG
) {
779 if (sx_in(bp
, CD186x_MSVR
) & MSVR_DSR
) {
781 port
->IER
|= IER_TXRDY
;
782 if (port
->xmit_cnt
<= port
->wakeup_chars
)
786 port
->IER
&= ~IER_TXRDY
;
788 sx_out(bp
, CD186x_IER
, port
->IER
);
790 #endif /* SPECIALIX_BRAIN_DAMAGED_CTS */
792 /* Clear change bits */
793 sx_out(bp
, CD186x_MCR
, 0);
797 /* The main interrupt processing routine */
798 static irqreturn_t
sx_interrupt(int dummy
, void *dev_id
)
800 unsigned char status
;
802 struct specialix_board
*bp
= dev_id
;
803 unsigned long loop
= 0;
809 spin_lock_irqsave(&bp
->lock
, flags
);
811 dprintk(SX_DEBUG_FLOW
, "enter %s port %d room: %ld\n", __func__
,
812 port_No(sx_get_port(bp
, "INT")),
813 SERIAL_XMIT_SIZE
- sx_get_port(bp
, "ITN")->xmit_cnt
- 1);
814 if (!(bp
->flags
& SX_BOARD_ACTIVE
)) {
815 dprintk(SX_DEBUG_IRQ
, "sx: False interrupt. irq %d.\n",
817 spin_unlock_irqrestore(&bp
->lock
, flags
);
824 while (++loop
< 16) {
825 status
= sx_in(bp
, CD186x_SRSR
) &
826 (SRSR_RREQint
| SRSR_TREQint
| SRSR_MREQint
);
829 if (status
& SRSR_RREQint
) {
830 ack
= sx_in(bp
, CD186x_RRAR
);
832 if (ack
== (SX_ID
| GIVR_IT_RCV
))
834 else if (ack
== (SX_ID
| GIVR_IT_REXC
))
838 "sx%d: status: 0x%x Bad receive ack 0x%02x.\n",
839 board_No(bp
), status
, ack
);
841 } else if (status
& SRSR_TREQint
) {
842 ack
= sx_in(bp
, CD186x_TRAR
);
844 if (ack
== (SX_ID
| GIVR_IT_TX
))
847 printk(KERN_ERR
"sx%d: status: 0x%x Bad transmit ack 0x%02x. port: %d\n",
848 board_No(bp
), status
, ack
,
849 port_No(sx_get_port(bp
, "Int")));
850 } else if (status
& SRSR_MREQint
) {
851 ack
= sx_in(bp
, CD186x_MRAR
);
853 if (ack
== (SX_ID
| GIVR_IT_MODEM
))
857 "sx%d: status: 0x%x Bad modem ack 0x%02x.\n",
858 board_No(bp
), status
, ack
);
862 sx_out(bp
, CD186x_EOIR
, 0); /* Mark end of interrupt */
865 outb(bp
->reg
, bp
->base
+ SX_ADDR_REG
);
866 spin_unlock_irqrestore(&bp
->lock
, flags
);
873 * Routines for open & close processing.
876 static void turn_ints_off(struct specialix_board
*bp
)
881 spin_lock_irqsave(&bp
->lock
, flags
);
882 (void) sx_in_off(bp
, 0); /* Turn off interrupts. */
883 spin_unlock_irqrestore(&bp
->lock
, flags
);
888 static void turn_ints_on(struct specialix_board
*bp
)
894 spin_lock_irqsave(&bp
->lock
, flags
);
895 (void) sx_in(bp
, 0); /* Turn ON interrupts. */
896 spin_unlock_irqrestore(&bp
->lock
, flags
);
902 /* Called with disabled interrupts */
903 static int sx_setup_board(struct specialix_board
*bp
)
907 if (bp
->flags
& SX_BOARD_ACTIVE
)
910 if (bp
->flags
& SX_BOARD_IS_PCI
)
911 error
= request_irq(bp
->irq
, sx_interrupt
,
912 IRQF_DISABLED
| IRQF_SHARED
, "specialix IO8+", bp
);
914 error
= request_irq(bp
->irq
, sx_interrupt
,
915 IRQF_DISABLED
, "specialix IO8+", bp
);
921 bp
->flags
|= SX_BOARD_ACTIVE
;
927 /* Called with disabled interrupts */
928 static void sx_shutdown_board(struct specialix_board
*bp
)
932 if (!(bp
->flags
& SX_BOARD_ACTIVE
)) {
937 bp
->flags
&= ~SX_BOARD_ACTIVE
;
939 dprintk(SX_DEBUG_IRQ
, "Freeing IRQ%d for board %d.\n",
940 bp
->irq
, board_No(bp
));
941 free_irq(bp
->irq
, bp
);
946 static unsigned int sx_crtscts(struct tty_struct
*tty
)
949 return C_CRTSCTS(tty
);
954 * Setting up port characteristics.
955 * Must be called with disabled interrupts
957 static void sx_change_speed(struct specialix_board
*bp
,
958 struct specialix_port
*port
)
960 struct tty_struct
*tty
;
963 unsigned char cor1
= 0, cor3
= 0;
964 unsigned char mcor1
= 0, mcor2
= 0;
965 static unsigned long again
;
970 tty
= port
->port
.tty
;
971 if (!tty
|| !tty
->termios
) {
978 /* Select port on the board */
979 spin_lock_irqsave(&bp
->lock
, flags
);
980 sx_out(bp
, CD186x_CAR
, port_No(port
));
982 /* The Specialix board doens't implement the RTS lines.
983 They are used to set the IRQ level. Don't touch them. */
985 port
->MSVR
= MSVR_DTR
| (sx_in(bp
, CD186x_MSVR
) & MSVR_RTS
);
987 port
->MSVR
= (sx_in(bp
, CD186x_MSVR
) & MSVR_RTS
);
988 spin_unlock_irqrestore(&bp
->lock
, flags
);
989 dprintk(SX_DEBUG_TERMIOS
, "sx: got MSVR=%02x.\n", port
->MSVR
);
990 baud
= tty_get_baud_rate(tty
);
993 if ((port
->port
.flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_HI
)
995 if ((port
->port
.flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_VHI
)
1000 /* Drop DTR & exit */
1001 dprintk(SX_DEBUG_TERMIOS
, "Dropping DTR... Hmm....\n");
1002 if (!sx_crtscts(tty
)) {
1003 port
->MSVR
&= ~MSVR_DTR
;
1004 spin_lock_irqsave(&bp
->lock
, flags
);
1005 sx_out(bp
, CD186x_MSVR
, port
->MSVR
);
1006 spin_unlock_irqrestore(&bp
->lock
, flags
);
1008 dprintk(SX_DEBUG_TERMIOS
, "Can't drop DTR: no DTR.\n");
1012 if (!sx_crtscts(tty
))
1013 port
->MSVR
|= MSVR_DTR
;
1017 * Now we must calculate some speed depended things
1020 /* Set baud rate for port */
1021 tmp
= port
->custom_divisor
;
1024 "sx%d: Using custom baud rate divisor %ld. \n"
1025 "This is an untested option, please be careful.\n",
1026 port_No(port
), tmp
);
1028 tmp
= (((SX_OSCFREQ
+ baud
/2) / baud
+ CD186x_TPC
/2) /
1031 if (tmp
< 0x10 && time_before(again
, jiffies
)) {
1032 again
= jiffies
+ HZ
* 60;
1033 /* Page 48 of version 2.0 of the CL-CD1865 databook */
1035 printk(KERN_INFO
"sx%d: Baud rate divisor is %ld. \n"
1036 "Performance degradation is possible.\n"
1037 "Read specialix.txt for more info.\n",
1038 port_No(port
), tmp
);
1040 printk(KERN_INFO
"sx%d: Baud rate divisor is %ld. \n"
1041 "Warning: overstressing Cirrus chip. This might not work.\n"
1042 "Read specialix.txt for more info.\n", port_No(port
), tmp
);
1045 spin_lock_irqsave(&bp
->lock
, flags
);
1046 sx_out(bp
, CD186x_RBPRH
, (tmp
>> 8) & 0xff);
1047 sx_out(bp
, CD186x_TBPRH
, (tmp
>> 8) & 0xff);
1048 sx_out(bp
, CD186x_RBPRL
, tmp
& 0xff);
1049 sx_out(bp
, CD186x_TBPRL
, tmp
& 0xff);
1050 spin_unlock_irqrestore(&bp
->lock
, flags
);
1051 if (port
->custom_divisor
)
1052 baud
= (SX_OSCFREQ
+ port
->custom_divisor
/2) /
1053 port
->custom_divisor
;
1054 baud
= (baud
+ 5) / 10; /* Estimated CPS */
1056 /* Two timer ticks seems enough to wakeup something like SLIP driver */
1057 tmp
= ((baud
+ HZ
/2) / HZ
) * 2 - CD186x_NFIFO
;
1058 port
->wakeup_chars
= (tmp
< 0) ? 0 : ((tmp
>= SERIAL_XMIT_SIZE
) ?
1059 SERIAL_XMIT_SIZE
- 1 : tmp
);
1061 /* Receiver timeout will be transmission time for 1.5 chars */
1062 tmp
= (SPECIALIX_TPS
+ SPECIALIX_TPS
/2 + baud
/2) / baud
;
1063 tmp
= (tmp
> 0xff) ? 0xff : tmp
;
1064 spin_lock_irqsave(&bp
->lock
, flags
);
1065 sx_out(bp
, CD186x_RTPR
, tmp
);
1066 spin_unlock_irqrestore(&bp
->lock
, flags
);
1067 switch (C_CSIZE(tty
)) {
1085 cor1
|= COR1_IGNORE
;
1086 if (C_PARENB(tty
)) {
1087 cor1
|= COR1_NORMPAR
;
1091 cor1
&= ~COR1_IGNORE
;
1093 /* Set marking of some errors */
1094 port
->mark_mask
= RCSR_OE
| RCSR_TOUT
;
1096 port
->mark_mask
|= RCSR_FE
| RCSR_PE
;
1097 if (I_BRKINT(tty
) || I_PARMRK(tty
))
1098 port
->mark_mask
|= RCSR_BREAK
;
1100 port
->mark_mask
&= ~(RCSR_FE
| RCSR_PE
);
1101 if (I_IGNBRK(tty
)) {
1102 port
->mark_mask
&= ~RCSR_BREAK
;
1104 /* Real raw mode. Ignore all */
1105 port
->mark_mask
&= ~RCSR_OE
;
1107 /* Enable Hardware Flow Control */
1108 if (C_CRTSCTS(tty
)) {
1109 #ifdef SPECIALIX_BRAIN_DAMAGED_CTS
1110 port
->IER
|= IER_DSR
| IER_CTS
;
1111 mcor1
|= MCOR1_DSRZD
| MCOR1_CTSZD
;
1112 mcor2
|= MCOR2_DSROD
| MCOR2_CTSOD
;
1113 spin_lock_irqsave(&bp
->lock
, flags
);
1114 tty
->hw_stopped
= !(sx_in(bp
, CD186x_MSVR
) &
1115 (MSVR_CTS
|MSVR_DSR
));
1116 spin_unlock_irqrestore(&bp
->lock
, flags
);
1118 port
->COR2
|= COR2_CTSAE
;
1121 /* Some people reported that it works, but I still doubt it */
1123 port
->COR2
|= COR2_TXIBE
;
1124 cor3
|= (COR3_FCT
| COR3_SCDE
);
1126 port
->COR2
|= COR2_IXM
;
1127 spin_lock_irqsave(&bp
->lock
, flags
);
1128 sx_out(bp
, CD186x_SCHR1
, START_CHAR(tty
));
1129 sx_out(bp
, CD186x_SCHR2
, STOP_CHAR(tty
));
1130 sx_out(bp
, CD186x_SCHR3
, START_CHAR(tty
));
1131 sx_out(bp
, CD186x_SCHR4
, STOP_CHAR(tty
));
1132 spin_unlock_irqrestore(&bp
->lock
, flags
);
1134 if (!C_CLOCAL(tty
)) {
1135 /* Enable CD check */
1136 port
->IER
|= IER_CD
;
1137 mcor1
|= MCOR1_CDZD
;
1138 mcor2
|= MCOR2_CDOD
;
1142 /* Enable receiver */
1143 port
->IER
|= IER_RXD
;
1145 /* Set input FIFO size (1-8 bytes) */
1147 /* Setting up CD186x channel registers */
1148 spin_lock_irqsave(&bp
->lock
, flags
);
1149 sx_out(bp
, CD186x_COR1
, cor1
);
1150 sx_out(bp
, CD186x_COR2
, port
->COR2
);
1151 sx_out(bp
, CD186x_COR3
, cor3
);
1152 spin_unlock_irqrestore(&bp
->lock
, flags
);
1153 /* Make CD186x know about registers change */
1155 spin_lock_irqsave(&bp
->lock
, flags
);
1156 sx_out(bp
, CD186x_CCR
, CCR_CORCHG1
| CCR_CORCHG2
| CCR_CORCHG3
);
1157 /* Setting up modem option registers */
1158 dprintk(SX_DEBUG_TERMIOS
, "Mcor1 = %02x, mcor2 = %02x.\n",
1160 sx_out(bp
, CD186x_MCOR1
, mcor1
);
1161 sx_out(bp
, CD186x_MCOR2
, mcor2
);
1162 spin_unlock_irqrestore(&bp
->lock
, flags
);
1163 /* Enable CD186x transmitter & receiver */
1165 spin_lock_irqsave(&bp
->lock
, flags
);
1166 sx_out(bp
, CD186x_CCR
, CCR_TXEN
| CCR_RXEN
);
1167 /* Enable interrupts */
1168 sx_out(bp
, CD186x_IER
, port
->IER
);
1169 /* And finally set the modem lines... */
1170 sx_out(bp
, CD186x_MSVR
, port
->MSVR
);
1171 spin_unlock_irqrestore(&bp
->lock
, flags
);
1177 /* Must be called with interrupts enabled */
1178 static int sx_setup_port(struct specialix_board
*bp
,
1179 struct specialix_port
*port
)
1181 unsigned long flags
;
1185 if (port
->port
.flags
& ASYNC_INITIALIZED
) {
1190 if (!port
->xmit_buf
) {
1191 /* We may sleep in get_zeroed_page() */
1194 tmp
= get_zeroed_page(GFP_KERNEL
);
1200 if (port
->xmit_buf
) {
1203 return -ERESTARTSYS
;
1205 port
->xmit_buf
= (unsigned char *) tmp
;
1208 spin_lock_irqsave(&port
->lock
, flags
);
1211 clear_bit(TTY_IO_ERROR
, &port
->port
.tty
->flags
);
1213 port
->xmit_cnt
= port
->xmit_head
= port
->xmit_tail
= 0;
1214 sx_change_speed(bp
, port
);
1215 port
->port
.flags
|= ASYNC_INITIALIZED
;
1217 spin_unlock_irqrestore(&port
->lock
, flags
);
1225 /* Must be called with interrupts disabled */
1226 static void sx_shutdown_port(struct specialix_board
*bp
,
1227 struct specialix_port
*port
)
1229 struct tty_struct
*tty
;
1231 unsigned long flags
;
1235 if (!(port
->port
.flags
& ASYNC_INITIALIZED
)) {
1240 if (sx_debug
& SX_DEBUG_FIFO
) {
1241 dprintk(SX_DEBUG_FIFO
,
1242 "sx%d: port %d: %ld overruns, FIFO hits [ ",
1243 board_No(bp
), port_No(port
), port
->overrun
);
1244 for (i
= 0; i
< 10; i
++)
1245 dprintk(SX_DEBUG_FIFO
, "%ld ", port
->hits
[i
]);
1246 dprintk(SX_DEBUG_FIFO
, "].\n");
1249 if (port
->xmit_buf
) {
1250 free_page((unsigned long) port
->xmit_buf
);
1251 port
->xmit_buf
= NULL
;
1255 spin_lock_irqsave(&bp
->lock
, flags
);
1256 sx_out(bp
, CD186x_CAR
, port_No(port
));
1258 tty
= port
->port
.tty
;
1259 if (tty
== NULL
|| C_HUPCL(tty
)) {
1261 sx_out(bp
, CD186x_MSVDTR
, 0);
1263 spin_unlock_irqrestore(&bp
->lock
, flags
);
1266 spin_lock_irqsave(&bp
->lock
, flags
);
1267 sx_out(bp
, CD186x_CCR
, CCR_SOFTRESET
);
1268 /* Disable all interrupts from this port */
1270 sx_out(bp
, CD186x_IER
, port
->IER
);
1271 spin_unlock_irqrestore(&bp
->lock
, flags
);
1273 set_bit(TTY_IO_ERROR
, &tty
->flags
);
1274 port
->port
.flags
&= ~ASYNC_INITIALIZED
;
1277 sx_shutdown_board(bp
);
1282 static int block_til_ready(struct tty_struct
*tty
, struct file
*filp
,
1283 struct specialix_port
*port
)
1285 DECLARE_WAITQUEUE(wait
, current
);
1286 struct specialix_board
*bp
= port_Board(port
);
1290 unsigned long flags
;
1295 * If the device is in the middle of being closed, then block
1296 * until it's done, and then try again.
1298 if (tty_hung_up_p(filp
) || port
->port
.flags
& ASYNC_CLOSING
) {
1299 interruptible_sleep_on(&port
->port
.close_wait
);
1300 if (port
->port
.flags
& ASYNC_HUP_NOTIFY
) {
1305 return -ERESTARTSYS
;
1310 * If non-blocking mode is set, or the port is not enabled,
1311 * then make the check up front and then exit.
1313 if ((filp
->f_flags
& O_NONBLOCK
) ||
1314 (tty
->flags
& (1 << TTY_IO_ERROR
))) {
1315 port
->port
.flags
|= ASYNC_NORMAL_ACTIVE
;
1324 * Block waiting for the carrier detect and the line to become
1325 * free (i.e., not in use by the callout). While we are in
1326 * this loop, info->count is dropped by one, so that
1327 * rs_close() knows when to free things. We restore it upon
1328 * exit, either normal or abnormal.
1331 add_wait_queue(&port
->port
.open_wait
, &wait
);
1332 spin_lock_irqsave(&port
->lock
, flags
);
1333 if (!tty_hung_up_p(filp
))
1335 spin_unlock_irqrestore(&port
->lock
, flags
);
1336 port
->port
.blocked_open
++;
1338 spin_lock_irqsave(&bp
->lock
, flags
);
1339 sx_out(bp
, CD186x_CAR
, port_No(port
));
1340 CD
= sx_in(bp
, CD186x_MSVR
) & MSVR_CD
;
1341 if (sx_crtscts(tty
)) {
1343 port
->MSVR
|= MSVR_DTR
; /* WTF? */
1344 sx_out(bp
, CD186x_MSVR
, port
->MSVR
);
1347 port
->MSVR
|= MSVR_DTR
;
1348 sx_out(bp
, CD186x_MSVR
, port
->MSVR
);
1350 spin_unlock_irqrestore(&bp
->lock
, flags
);
1351 set_current_state(TASK_INTERRUPTIBLE
);
1352 if (tty_hung_up_p(filp
) ||
1353 !(port
->port
.flags
& ASYNC_INITIALIZED
)) {
1354 if (port
->port
.flags
& ASYNC_HUP_NOTIFY
)
1357 retval
= -ERESTARTSYS
;
1360 if (!(port
->port
.flags
& ASYNC_CLOSING
) &&
1363 if (signal_pending(current
)) {
1364 retval
= -ERESTARTSYS
;
1372 set_current_state(TASK_RUNNING
);
1373 remove_wait_queue(&port
->port
.open_wait
, &wait
);
1374 spin_lock_irqsave(&port
->lock
, flags
);
1375 if (!tty_hung_up_p(filp
))
1377 port
->port
.blocked_open
--;
1378 spin_unlock_irqrestore(&port
->lock
, flags
);
1384 port
->port
.flags
|= ASYNC_NORMAL_ACTIVE
;
1390 static int sx_open(struct tty_struct
*tty
, struct file
*filp
)
1394 struct specialix_port
*port
;
1395 struct specialix_board
*bp
;
1397 unsigned long flags
;
1401 board
= SX_BOARD(tty
->index
);
1403 if (board
>= SX_NBOARD
|| !(sx_board
[board
].flags
& SX_BOARD_PRESENT
)) {
1408 bp
= &sx_board
[board
];
1409 port
= sx_port
+ board
* SX_NPORT
+ SX_PORT(tty
->index
);
1411 for (i
= 0; i
< 10; i
++)
1414 dprintk(SX_DEBUG_OPEN
,
1415 "Board = %d, bp = %p, port = %p, portno = %d.\n",
1416 board
, bp
, port
, SX_PORT(tty
->index
));
1418 if (sx_paranoia_check(port
, tty
->name
, "sx_open")) {
1423 error
= sx_setup_board(bp
);
1429 spin_lock_irqsave(&bp
->lock
, flags
);
1432 tty
->driver_data
= port
;
1433 port
->port
.tty
= tty
;
1434 spin_unlock_irqrestore(&bp
->lock
, flags
);
1436 error
= sx_setup_port(bp
, port
);
1442 error
= block_til_ready(tty
, filp
, port
);
1452 static void sx_flush_buffer(struct tty_struct
*tty
)
1454 struct specialix_port
*port
= tty
->driver_data
;
1455 unsigned long flags
;
1456 struct specialix_board
*bp
;
1460 if (sx_paranoia_check(port
, tty
->name
, "sx_flush_buffer")) {
1465 bp
= port_Board(port
);
1466 spin_lock_irqsave(&port
->lock
, flags
);
1467 port
->xmit_cnt
= port
->xmit_head
= port
->xmit_tail
= 0;
1468 spin_unlock_irqrestore(&port
->lock
, flags
);
1474 static void sx_close(struct tty_struct
*tty
, struct file
*filp
)
1476 struct specialix_port
*port
= tty
->driver_data
;
1477 struct specialix_board
*bp
;
1478 unsigned long flags
;
1479 unsigned long timeout
;
1482 if (!port
|| sx_paranoia_check(port
, tty
->name
, "close")) {
1486 spin_lock_irqsave(&port
->lock
, flags
);
1488 if (tty_hung_up_p(filp
)) {
1489 spin_unlock_irqrestore(&port
->lock
, flags
);
1494 bp
= port_Board(port
);
1495 if (tty
->count
== 1 && port
->port
.count
!= 1) {
1496 printk(KERN_ERR
"sx%d: sx_close: bad port count;"
1497 " tty->count is 1, port count is %d\n",
1498 board_No(bp
), port
->port
.count
);
1499 port
->port
.count
= 1;
1502 if (port
->port
.count
> 1) {
1506 spin_unlock_irqrestore(&port
->lock
, flags
);
1511 port
->port
.flags
|= ASYNC_CLOSING
;
1513 * Now we wait for the transmit buffer to clear; and we notify
1514 * the line discipline to only process XON/XOFF characters.
1517 spin_unlock_irqrestore(&port
->lock
, flags
);
1518 dprintk(SX_DEBUG_OPEN
, "Closing\n");
1519 if (port
->port
.closing_wait
!= ASYNC_CLOSING_WAIT_NONE
)
1520 tty_wait_until_sent(tty
, port
->port
.closing_wait
);
1522 * At this point we stop accepting input. To do this, we
1523 * disable the receive line status interrupts, and tell the
1524 * interrupt driver to stop checking the data ready bit in the
1525 * line status register.
1527 dprintk(SX_DEBUG_OPEN
, "Closed\n");
1528 port
->IER
&= ~IER_RXD
;
1529 if (port
->port
.flags
& ASYNC_INITIALIZED
) {
1530 port
->IER
&= ~IER_TXRDY
;
1531 port
->IER
|= IER_TXEMPTY
;
1532 spin_lock_irqsave(&bp
->lock
, flags
);
1533 sx_out(bp
, CD186x_CAR
, port_No(port
));
1534 sx_out(bp
, CD186x_IER
, port
->IER
);
1535 spin_unlock_irqrestore(&bp
->lock
, flags
);
1537 * Before we drop DTR, make sure the UART transmitter
1538 * has completely drained; this is especially
1539 * important if there is a transmit FIFO!
1541 timeout
= jiffies
+HZ
;
1542 while (port
->IER
& IER_TXEMPTY
) {
1543 set_current_state(TASK_INTERRUPTIBLE
);
1544 msleep_interruptible(jiffies_to_msecs(port
->timeout
));
1545 if (time_after(jiffies
, timeout
)) {
1546 printk(KERN_INFO
"Timeout waiting for close\n");
1553 if (--bp
->count
< 0) {
1555 "sx%d: sx_shutdown_port: bad board count: %d port: %d\n",
1556 board_No(bp
), bp
->count
, tty
->index
);
1559 if (--port
->port
.count
< 0) {
1561 "sx%d: sx_close: bad port count for tty%d: %d\n",
1562 board_No(bp
), port_No(port
), port
->port
.count
);
1563 port
->port
.count
= 0;
1566 sx_shutdown_port(bp
, port
);
1567 sx_flush_buffer(tty
);
1568 tty_ldisc_flush(tty
);
1569 spin_lock_irqsave(&port
->lock
, flags
);
1571 port
->port
.tty
= NULL
;
1572 spin_unlock_irqrestore(&port
->lock
, flags
);
1573 if (port
->port
.blocked_open
) {
1574 if (port
->port
.close_delay
)
1575 msleep_interruptible(
1576 jiffies_to_msecs(port
->port
.close_delay
));
1577 wake_up_interruptible(&port
->port
.open_wait
);
1579 port
->port
.flags
&= ~(ASYNC_NORMAL_ACTIVE
|ASYNC_CLOSING
);
1580 wake_up_interruptible(&port
->port
.close_wait
);
1586 static int sx_write(struct tty_struct
*tty
,
1587 const unsigned char *buf
, int count
)
1589 struct specialix_port
*port
= tty
->driver_data
;
1590 struct specialix_board
*bp
;
1592 unsigned long flags
;
1595 if (sx_paranoia_check(port
, tty
->name
, "sx_write")) {
1600 bp
= port_Board(port
);
1602 if (!port
->xmit_buf
) {
1608 spin_lock_irqsave(&port
->lock
, flags
);
1609 c
= min_t(int, count
, min(SERIAL_XMIT_SIZE
- port
->xmit_cnt
- 1,
1610 SERIAL_XMIT_SIZE
- port
->xmit_head
));
1612 spin_unlock_irqrestore(&port
->lock
, flags
);
1615 memcpy(port
->xmit_buf
+ port
->xmit_head
, buf
, c
);
1616 port
->xmit_head
= (port
->xmit_head
+ c
) & (SERIAL_XMIT_SIZE
-1);
1617 port
->xmit_cnt
+= c
;
1618 spin_unlock_irqrestore(&port
->lock
, flags
);
1625 spin_lock_irqsave(&bp
->lock
, flags
);
1626 if (port
->xmit_cnt
&& !tty
->stopped
&& !tty
->hw_stopped
&&
1627 !(port
->IER
& IER_TXRDY
)) {
1628 port
->IER
|= IER_TXRDY
;
1629 sx_out(bp
, CD186x_CAR
, port_No(port
));
1630 sx_out(bp
, CD186x_IER
, port
->IER
);
1632 spin_unlock_irqrestore(&bp
->lock
, flags
);
1639 static int sx_put_char(struct tty_struct
*tty
, unsigned char ch
)
1641 struct specialix_port
*port
= tty
->driver_data
;
1642 unsigned long flags
;
1643 struct specialix_board
*bp
;
1647 if (sx_paranoia_check(port
, tty
->name
, "sx_put_char")) {
1651 dprintk(SX_DEBUG_TX
, "check tty: %p %p\n", tty
, port
->xmit_buf
);
1652 if (!port
->xmit_buf
) {
1656 bp
= port_Board(port
);
1657 spin_lock_irqsave(&port
->lock
, flags
);
1659 dprintk(SX_DEBUG_TX
, "xmit_cnt: %d xmit_buf: %p\n",
1660 port
->xmit_cnt
, port
->xmit_buf
);
1661 if (port
->xmit_cnt
>= SERIAL_XMIT_SIZE
- 1 || !port
->xmit_buf
) {
1662 spin_unlock_irqrestore(&port
->lock
, flags
);
1663 dprintk(SX_DEBUG_TX
, "Exit size\n");
1667 dprintk(SX_DEBUG_TX
, "Handle xmit: %p %p\n", port
, port
->xmit_buf
);
1668 port
->xmit_buf
[port
->xmit_head
++] = ch
;
1669 port
->xmit_head
&= SERIAL_XMIT_SIZE
- 1;
1671 spin_unlock_irqrestore(&port
->lock
, flags
);
1678 static void sx_flush_chars(struct tty_struct
*tty
)
1680 struct specialix_port
*port
= tty
->driver_data
;
1681 unsigned long flags
;
1682 struct specialix_board
*bp
= port_Board(port
);
1686 if (sx_paranoia_check(port
, tty
->name
, "sx_flush_chars")) {
1690 if (port
->xmit_cnt
<= 0 || tty
->stopped
|| tty
->hw_stopped
||
1695 spin_lock_irqsave(&bp
->lock
, flags
);
1696 port
->IER
|= IER_TXRDY
;
1697 sx_out(port_Board(port
), CD186x_CAR
, port_No(port
));
1698 sx_out(port_Board(port
), CD186x_IER
, port
->IER
);
1699 spin_unlock_irqrestore(&bp
->lock
, flags
);
1705 static int sx_write_room(struct tty_struct
*tty
)
1707 struct specialix_port
*port
= tty
->driver_data
;
1712 if (sx_paranoia_check(port
, tty
->name
, "sx_write_room")) {
1717 ret
= SERIAL_XMIT_SIZE
- port
->xmit_cnt
- 1;
1726 static int sx_chars_in_buffer(struct tty_struct
*tty
)
1728 struct specialix_port
*port
= tty
->driver_data
;
1732 if (sx_paranoia_check(port
, tty
->name
, "sx_chars_in_buffer")) {
1737 return port
->xmit_cnt
;
1740 static int sx_tiocmget(struct tty_struct
*tty
, struct file
*file
)
1742 struct specialix_port
*port
= tty
->driver_data
;
1743 struct specialix_board
*bp
;
1744 unsigned char status
;
1745 unsigned int result
;
1746 unsigned long flags
;
1750 if (sx_paranoia_check(port
, tty
->name
, __func__
)) {
1755 bp
= port_Board(port
);
1756 spin_lock_irqsave(&bp
->lock
, flags
);
1757 sx_out(bp
, CD186x_CAR
, port_No(port
));
1758 status
= sx_in(bp
, CD186x_MSVR
);
1759 spin_unlock_irqrestore(&bp
->lock
, flags
);
1760 dprintk(SX_DEBUG_INIT
, "Got msvr[%d] = %02x, car = %d.\n",
1761 port_No(port
), status
, sx_in(bp
, CD186x_CAR
));
1762 dprintk(SX_DEBUG_INIT
, "sx_port = %p, port = %p\n", sx_port
, port
);
1763 if (sx_crtscts(port
->port
.tty
)) {
1764 result
= TIOCM_DTR
| TIOCM_DSR
1765 | ((status
& MSVR_DTR
) ? TIOCM_RTS
: 0)
1766 | ((status
& MSVR_CD
) ? TIOCM_CAR
: 0)
1767 | ((status
& MSVR_CTS
) ? TIOCM_CTS
: 0);
1769 result
= TIOCM_RTS
| TIOCM_DSR
1770 | ((status
& MSVR_DTR
) ? TIOCM_DTR
: 0)
1771 | ((status
& MSVR_CD
) ? TIOCM_CAR
: 0)
1772 | ((status
& MSVR_CTS
) ? TIOCM_CTS
: 0);
1781 static int sx_tiocmset(struct tty_struct
*tty
, struct file
*file
,
1782 unsigned int set
, unsigned int clear
)
1784 struct specialix_port
*port
= tty
->driver_data
;
1785 unsigned long flags
;
1786 struct specialix_board
*bp
;
1790 if (sx_paranoia_check(port
, tty
->name
, __func__
)) {
1795 bp
= port_Board(port
);
1797 spin_lock_irqsave(&port
->lock
, flags
);
1798 if (sx_crtscts(port
->port
.tty
)) {
1799 if (set
& TIOCM_RTS
)
1800 port
->MSVR
|= MSVR_DTR
;
1802 if (set
& TIOCM_DTR
)
1803 port
->MSVR
|= MSVR_DTR
;
1805 if (sx_crtscts(port
->port
.tty
)) {
1806 if (clear
& TIOCM_RTS
)
1807 port
->MSVR
&= ~MSVR_DTR
;
1809 if (clear
& TIOCM_DTR
)
1810 port
->MSVR
&= ~MSVR_DTR
;
1812 spin_lock(&bp
->lock
);
1813 sx_out(bp
, CD186x_CAR
, port_No(port
));
1814 sx_out(bp
, CD186x_MSVR
, port
->MSVR
);
1815 spin_unlock(&bp
->lock
);
1816 spin_unlock_irqrestore(&port
->lock
, flags
);
1822 static int sx_send_break(struct tty_struct
*tty
, int length
)
1824 struct specialix_port
*port
= tty
->driver_data
;
1825 struct specialix_board
*bp
= port_Board(port
);
1826 unsigned long flags
;
1829 if (length
== 0 || length
== -1)
1832 spin_lock_irqsave(&port
->lock
, flags
);
1833 port
->break_length
= SPECIALIX_TPS
/ HZ
* length
;
1834 port
->COR2
|= COR2_ETC
;
1835 port
->IER
|= IER_TXRDY
;
1836 spin_lock(&bp
->lock
);
1837 sx_out(bp
, CD186x_CAR
, port_No(port
));
1838 sx_out(bp
, CD186x_COR2
, port
->COR2
);
1839 sx_out(bp
, CD186x_IER
, port
->IER
);
1840 spin_unlock(&bp
->lock
);
1841 spin_unlock_irqrestore(&port
->lock
, flags
);
1843 spin_lock_irqsave(&bp
->lock
, flags
);
1844 sx_out(bp
, CD186x_CCR
, CCR_CORCHG2
);
1845 spin_unlock_irqrestore(&bp
->lock
, flags
);
1853 static int sx_set_serial_info(struct specialix_port
*port
,
1854 struct serial_struct __user
*newinfo
)
1856 struct serial_struct tmp
;
1857 struct specialix_board
*bp
= port_Board(port
);
1862 if (copy_from_user(&tmp
, newinfo
, sizeof(tmp
))) {
1867 mutex_lock(&port
->port
.mutex
);
1868 change_speed
= ((port
->port
.flags
& ASYNC_SPD_MASK
) !=
1869 (tmp
.flags
& ASYNC_SPD_MASK
));
1870 change_speed
|= (tmp
.custom_divisor
!= port
->custom_divisor
);
1872 if (!capable(CAP_SYS_ADMIN
)) {
1873 if ((tmp
.close_delay
!= port
->port
.close_delay
) ||
1874 (tmp
.closing_wait
!= port
->port
.closing_wait
) ||
1875 ((tmp
.flags
& ~ASYNC_USR_MASK
) !=
1876 (port
->port
.flags
& ~ASYNC_USR_MASK
))) {
1878 mutex_unlock(&port
->port
.mutex
);
1881 port
->port
.flags
= ((port
->port
.flags
& ~ASYNC_USR_MASK
) |
1882 (tmp
.flags
& ASYNC_USR_MASK
));
1883 port
->custom_divisor
= tmp
.custom_divisor
;
1885 port
->port
.flags
= ((port
->port
.flags
& ~ASYNC_FLAGS
) |
1886 (tmp
.flags
& ASYNC_FLAGS
));
1887 port
->port
.close_delay
= tmp
.close_delay
;
1888 port
->port
.closing_wait
= tmp
.closing_wait
;
1889 port
->custom_divisor
= tmp
.custom_divisor
;
1892 sx_change_speed(bp
, port
);
1895 mutex_unlock(&port
->port
.mutex
);
1900 static int sx_get_serial_info(struct specialix_port
*port
,
1901 struct serial_struct __user
*retinfo
)
1903 struct serial_struct tmp
;
1904 struct specialix_board
*bp
= port_Board(port
);
1908 memset(&tmp
, 0, sizeof(tmp
));
1909 mutex_lock(&port
->port
.mutex
);
1910 tmp
.type
= PORT_CIRRUS
;
1911 tmp
.line
= port
- sx_port
;
1912 tmp
.port
= bp
->base
;
1914 tmp
.flags
= port
->port
.flags
;
1915 tmp
.baud_base
= (SX_OSCFREQ
+ CD186x_TPC
/2) / CD186x_TPC
;
1916 tmp
.close_delay
= port
->port
.close_delay
* HZ
/100;
1917 tmp
.closing_wait
= port
->port
.closing_wait
* HZ
/100;
1918 tmp
.custom_divisor
= port
->custom_divisor
;
1919 tmp
.xmit_fifo_size
= CD186x_NFIFO
;
1920 mutex_unlock(&port
->port
.mutex
);
1921 if (copy_to_user(retinfo
, &tmp
, sizeof(tmp
))) {
1931 static int sx_ioctl(struct tty_struct
*tty
, struct file
*filp
,
1932 unsigned int cmd
, unsigned long arg
)
1934 struct specialix_port
*port
= tty
->driver_data
;
1935 void __user
*argp
= (void __user
*)arg
;
1939 if (sx_paranoia_check(port
, tty
->name
, "sx_ioctl")) {
1947 return sx_get_serial_info(port
, argp
);
1950 return sx_set_serial_info(port
, argp
);
1953 return -ENOIOCTLCMD
;
1960 static void sx_throttle(struct tty_struct
*tty
)
1962 struct specialix_port
*port
= tty
->driver_data
;
1963 struct specialix_board
*bp
;
1964 unsigned long flags
;
1968 if (sx_paranoia_check(port
, tty
->name
, "sx_throttle")) {
1973 bp
= port_Board(port
);
1975 /* Use DTR instead of RTS ! */
1976 if (sx_crtscts(tty
))
1977 port
->MSVR
&= ~MSVR_DTR
;
1979 /* Auch!!! I think the system shouldn't call this then. */
1980 /* Or maybe we're supposed (allowed?) to do our side of hw
1981 handshake anyway, even when hardware handshake is off.
1982 When you see this in your logs, please report.... */
1984 "sx%d: Need to throttle, but can't (hardware hs is off)\n",
1987 spin_lock_irqsave(&bp
->lock
, flags
);
1988 sx_out(bp
, CD186x_CAR
, port_No(port
));
1989 spin_unlock_irqrestore(&bp
->lock
, flags
);
1992 spin_lock_irqsave(&bp
->lock
, flags
);
1993 sx_out(bp
, CD186x_CCR
, CCR_SSCH2
);
1994 spin_unlock_irqrestore(&bp
->lock
, flags
);
1997 spin_lock_irqsave(&bp
->lock
, flags
);
1998 sx_out(bp
, CD186x_MSVR
, port
->MSVR
);
1999 spin_unlock_irqrestore(&bp
->lock
, flags
);
2005 static void sx_unthrottle(struct tty_struct
*tty
)
2007 struct specialix_port
*port
= tty
->driver_data
;
2008 struct specialix_board
*bp
;
2009 unsigned long flags
;
2013 if (sx_paranoia_check(port
, tty
->name
, "sx_unthrottle")) {
2018 bp
= port_Board(port
);
2020 spin_lock_irqsave(&port
->lock
, flags
);
2021 if (sx_crtscts(tty
))
2022 port
->MSVR
|= MSVR_DTR
;
2023 /* Else clause: see remark in "sx_throttle"... */
2024 spin_lock(&bp
->lock
);
2025 sx_out(bp
, CD186x_CAR
, port_No(port
));
2026 spin_unlock(&bp
->lock
);
2028 spin_unlock_irqrestore(&port
->lock
, flags
);
2030 spin_lock_irqsave(&bp
->lock
, flags
);
2031 sx_out(bp
, CD186x_CCR
, CCR_SSCH1
);
2032 spin_unlock_irqrestore(&bp
->lock
, flags
);
2034 spin_lock_irqsave(&port
->lock
, flags
);
2036 spin_lock(&bp
->lock
);
2037 sx_out(bp
, CD186x_MSVR
, port
->MSVR
);
2038 spin_unlock(&bp
->lock
);
2039 spin_unlock_irqrestore(&port
->lock
, flags
);
2045 static void sx_stop(struct tty_struct
*tty
)
2047 struct specialix_port
*port
= tty
->driver_data
;
2048 struct specialix_board
*bp
;
2049 unsigned long flags
;
2053 if (sx_paranoia_check(port
, tty
->name
, "sx_stop")) {
2058 bp
= port_Board(port
);
2060 spin_lock_irqsave(&port
->lock
, flags
);
2061 port
->IER
&= ~IER_TXRDY
;
2062 spin_lock(&bp
->lock
);
2063 sx_out(bp
, CD186x_CAR
, port_No(port
));
2064 sx_out(bp
, CD186x_IER
, port
->IER
);
2065 spin_unlock(&bp
->lock
);
2066 spin_unlock_irqrestore(&port
->lock
, flags
);
2072 static void sx_start(struct tty_struct
*tty
)
2074 struct specialix_port
*port
= tty
->driver_data
;
2075 struct specialix_board
*bp
;
2076 unsigned long flags
;
2080 if (sx_paranoia_check(port
, tty
->name
, "sx_start")) {
2085 bp
= port_Board(port
);
2087 spin_lock_irqsave(&port
->lock
, flags
);
2088 if (port
->xmit_cnt
&& port
->xmit_buf
&& !(port
->IER
& IER_TXRDY
)) {
2089 port
->IER
|= IER_TXRDY
;
2090 spin_lock(&bp
->lock
);
2091 sx_out(bp
, CD186x_CAR
, port_No(port
));
2092 sx_out(bp
, CD186x_IER
, port
->IER
);
2093 spin_unlock(&bp
->lock
);
2095 spin_unlock_irqrestore(&port
->lock
, flags
);
2100 static void sx_hangup(struct tty_struct
*tty
)
2102 struct specialix_port
*port
= tty
->driver_data
;
2103 struct specialix_board
*bp
;
2104 unsigned long flags
;
2108 if (sx_paranoia_check(port
, tty
->name
, "sx_hangup")) {
2113 bp
= port_Board(port
);
2115 sx_shutdown_port(bp
, port
);
2116 spin_lock_irqsave(&port
->lock
, flags
);
2117 bp
->count
-= port
->port
.count
;
2118 if (bp
->count
< 0) {
2120 "sx%d: sx_hangup: bad board count: %d port: %d\n",
2121 board_No(bp
), bp
->count
, tty
->index
);
2124 port
->port
.count
= 0;
2125 port
->port
.flags
&= ~ASYNC_NORMAL_ACTIVE
;
2126 port
->port
.tty
= NULL
;
2127 spin_unlock_irqrestore(&port
->lock
, flags
);
2128 wake_up_interruptible(&port
->port
.open_wait
);
2134 static void sx_set_termios(struct tty_struct
*tty
,
2135 struct ktermios
*old_termios
)
2137 struct specialix_port
*port
= tty
->driver_data
;
2138 unsigned long flags
;
2139 struct specialix_board
*bp
;
2141 if (sx_paranoia_check(port
, tty
->name
, "sx_set_termios"))
2144 bp
= port_Board(port
);
2145 spin_lock_irqsave(&port
->lock
, flags
);
2146 sx_change_speed(port_Board(port
), port
);
2147 spin_unlock_irqrestore(&port
->lock
, flags
);
2149 if ((old_termios
->c_cflag
& CRTSCTS
) &&
2150 !(tty
->termios
->c_cflag
& CRTSCTS
)) {
2151 tty
->hw_stopped
= 0;
2156 static const struct tty_operations sx_ops
= {
2160 .put_char
= sx_put_char
,
2161 .flush_chars
= sx_flush_chars
,
2162 .write_room
= sx_write_room
,
2163 .chars_in_buffer
= sx_chars_in_buffer
,
2164 .flush_buffer
= sx_flush_buffer
,
2166 .throttle
= sx_throttle
,
2167 .unthrottle
= sx_unthrottle
,
2168 .set_termios
= sx_set_termios
,
2171 .hangup
= sx_hangup
,
2172 .tiocmget
= sx_tiocmget
,
2173 .tiocmset
= sx_tiocmset
,
2174 .break_ctl
= sx_send_break
,
2177 static int sx_init_drivers(void)
2184 specialix_driver
= alloc_tty_driver(SX_NBOARD
* SX_NPORT
);
2185 if (!specialix_driver
) {
2186 printk(KERN_ERR
"sx: Couldn't allocate tty_driver.\n");
2191 specialix_driver
->owner
= THIS_MODULE
;
2192 specialix_driver
->name
= "ttyW";
2193 specialix_driver
->major
= SPECIALIX_NORMAL_MAJOR
;
2194 specialix_driver
->type
= TTY_DRIVER_TYPE_SERIAL
;
2195 specialix_driver
->subtype
= SERIAL_TYPE_NORMAL
;
2196 specialix_driver
->init_termios
= tty_std_termios
;
2197 specialix_driver
->init_termios
.c_cflag
=
2198 B9600
| CS8
| CREAD
| HUPCL
| CLOCAL
;
2199 specialix_driver
->init_termios
.c_ispeed
= 9600;
2200 specialix_driver
->init_termios
.c_ospeed
= 9600;
2201 specialix_driver
->flags
= TTY_DRIVER_REAL_RAW
|
2202 TTY_DRIVER_HARDWARE_BREAK
;
2203 tty_set_operations(specialix_driver
, &sx_ops
);
2205 error
= tty_register_driver(specialix_driver
);
2207 put_tty_driver(specialix_driver
);
2209 "sx: Couldn't register specialix IO8+ driver, error = %d\n",
2214 memset(sx_port
, 0, sizeof(sx_port
));
2215 for (i
= 0; i
< SX_NPORT
* SX_NBOARD
; i
++) {
2216 sx_port
[i
].magic
= SPECIALIX_MAGIC
;
2217 tty_port_init(&sx_port
[i
].port
);
2218 spin_lock_init(&sx_port
[i
].lock
);
2225 static void sx_release_drivers(void)
2229 tty_unregister_driver(specialix_driver
);
2230 put_tty_driver(specialix_driver
);
2235 * This routine must be called by kernel at boot time
2237 static int __init
specialix_init(void)
2244 printk(KERN_INFO
"sx: Specialix IO8+ driver v" VERSION
", (c) R.E.Wolff 1997/1998.\n");
2245 printk(KERN_INFO
"sx: derived from work (c) D.Gorodchanin 1994-1996.\n");
2248 "sx: DTR/RTS pin is RTS when CRTSCTS is on.\n");
2250 printk(KERN_INFO
"sx: DTR/RTS pin is always RTS.\n");
2252 for (i
= 0; i
< SX_NBOARD
; i
++)
2253 spin_lock_init(&sx_board
[i
].lock
);
2255 if (sx_init_drivers()) {
2260 for (i
= 0; i
< SX_NBOARD
; i
++)
2261 if (sx_board
[i
].base
&& !sx_probe(&sx_board
[i
]))
2266 struct pci_dev
*pdev
= NULL
;
2269 while (i
< SX_NBOARD
) {
2270 if (sx_board
[i
].flags
& SX_BOARD_PRESENT
) {
2274 pdev
= pci_get_device(PCI_VENDOR_ID_SPECIALIX
,
2275 PCI_DEVICE_ID_SPECIALIX_IO8
, pdev
);
2279 if (pci_enable_device(pdev
))
2282 sx_board
[i
].irq
= pdev
->irq
;
2284 sx_board
[i
].base
= pci_resource_start(pdev
, 2);
2286 sx_board
[i
].flags
|= SX_BOARD_IS_PCI
;
2287 if (!sx_probe(&sx_board
[i
]))
2290 /* May exit pci_get sequence early with lots of boards */
2297 sx_release_drivers();
2298 printk(KERN_INFO
"sx: No specialix IO8+ boards detected.\n");
2307 static int iobase
[SX_NBOARD
] = {0,};
2308 static int irq
[SX_NBOARD
] = {0,};
2310 module_param_array(iobase
, int, NULL
, 0);
2311 module_param_array(irq
, int, NULL
, 0);
2312 module_param(sx_debug
, int, 0);
2313 module_param(sx_rtscts
, int, 0);
2314 module_param(sx_rxfifo
, int, 0);
2317 * You can setup up to 4 boards.
2318 * by specifying "iobase=0xXXX,0xXXX ..." as insmod parameter.
2319 * You should specify the IRQs too in that case "irq=....,...".
2321 * More than 4 boards in one computer is not possible, as the card can
2322 * only use 4 different interrupts.
2325 static int __init
specialix_init_module(void)
2331 if (iobase
[0] || iobase
[1] || iobase
[2] || iobase
[3]) {
2332 for (i
= 0; i
< SX_NBOARD
; i
++) {
2333 sx_board
[i
].base
= iobase
[i
];
2334 sx_board
[i
].irq
= irq
[i
];
2335 sx_board
[i
].count
= 0;
2341 return specialix_init();
2344 static void __exit
specialix_exit_module(void)
2350 sx_release_drivers();
2351 for (i
= 0; i
< SX_NBOARD
; i
++)
2352 if (sx_board
[i
].flags
& SX_BOARD_PRESENT
)
2353 sx_release_io_range(&sx_board
[i
]);
2357 static struct pci_device_id specialx_pci_tbl
[] __devinitdata
= {
2358 { PCI_DEVICE(PCI_VENDOR_ID_SPECIALIX
, PCI_DEVICE_ID_SPECIALIX_IO8
) },
2361 MODULE_DEVICE_TABLE(pci
, specialx_pci_tbl
);
2363 module_init(specialix_init_module
);
2364 module_exit(specialix_exit_module
);
2366 MODULE_LICENSE("GPL");
2367 MODULE_ALIAS_CHARDEV_MAJOR(SPECIALIX_NORMAL_MAJOR
);