2 * mxser.c -- MOXA Smartio/Industio family multiport serial driver.
4 * Copyright (C) 1999-2006 Moxa Technologies (support@moxa.com.tw).
5 * Copyright (C) 2006 Jiri Slaby <jirislaby@gmail.com>
7 * This code is loosely based on the 1.8 moxa driver which is based on
8 * Linux serial driver, written by Linus Torvalds, Theodore T'so and
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
17 * <alan@redhat.com>. The original 1.8 code is available on www.moxa.com.
18 * - Fixed x86_64 cleanness
19 * - Fixed sleep with spinlock held in mxser_send_break
22 #include <linux/module.h>
23 #include <linux/autoconf.h>
24 #include <linux/errno.h>
25 #include <linux/signal.h>
26 #include <linux/sched.h>
27 #include <linux/timer.h>
28 #include <linux/interrupt.h>
29 #include <linux/tty.h>
30 #include <linux/tty_flip.h>
31 #include <linux/serial.h>
32 #include <linux/serial_reg.h>
33 #include <linux/major.h>
34 #include <linux/string.h>
35 #include <linux/fcntl.h>
36 #include <linux/ptrace.h>
37 #include <linux/gfp.h>
38 #include <linux/ioport.h>
40 #include <linux/smp_lock.h>
41 #include <linux/delay.h>
42 #include <linux/pci.h>
44 #include <asm/system.h>
47 #include <asm/bitops.h>
48 #include <asm/uaccess.h>
50 #include "mxser_new.h"
52 #define MXSER_VERSION "2.0"
53 #define MXSERMAJOR 174
54 #define MXSERCUMAJOR 175
56 #define MXSER_EVENT_TXLOW 1
58 #define MXSER_BOARDS 4 /* Max. boards */
59 #define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
60 #define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
61 #define MXSER_ISR_PASS_LIMIT 99999L
63 #define MXSER_ERR_IOADDR -1
64 #define MXSER_ERR_IRQ -2
65 #define MXSER_ERR_IRQ_CONFLIT -3
66 #define MXSER_ERR_VECTOR -4
68 #define WAKEUP_CHARS 256
70 #define UART_MCR_AFE 0x20
71 #define UART_LSR_SPECIAL 0x1E
73 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|\
76 #define C168_ASIC_ID 1
77 #define C104_ASIC_ID 2
78 #define C102_ASIC_ID 0xB
79 #define CI132_ASIC_ID 4
80 #define CI134_ASIC_ID 3
81 #define CI104J_ASIC_ID 5
83 #define MXSER_HIGHBAUD 1
86 /* This is only for PCI */
96 } Gpci_uart_info
[] = {
97 {MOXA_OTHER_UART
, 16, 16, 16, 14, 14, 1, 921600L},
98 {MOXA_MUST_MU150_HWID
, 64, 64, 64, 48, 48, 16, 230400L},
99 {MOXA_MUST_MU860_HWID
, 128, 128, 128, 96, 96, 32, 921600L}
101 #define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info)
103 struct mxser_cardinfo
{
109 static const struct mxser_cardinfo mxser_cards
[] = {
110 { 8, "C168 series", }, /* C168-ISA */
111 { 4, "C104 series", }, /* C104-ISA */
112 { 4, "CI-104J series", }, /* CI104J */
113 { 8, "C168H/PCI series", }, /* C168-PCI */
114 { 4, "C104H/PCI series", }, /* C104-PCI */
115 { 4, "C102 series", MXSER_HAS2
}, /* C102-ISA */
116 { 4, "CI-132 series", MXSER_HAS2
}, /* CI132 */
117 { 4, "CI-134 series", }, /* CI134 */
118 { 2, "CP-132 series", }, /* CP132 */
119 { 4, "CP-114 series", }, /* CP114 */
120 { 4, "CT-114 series", }, /* CT114 */
121 { 2, "CP-102 series", MXSER_HIGHBAUD
}, /* CP102 */
122 { 4, "CP-104U series", }, /* CP104U */
123 { 8, "CP-168U series", }, /* CP168U */
124 { 2, "CP-132U series", }, /* CP132U */
125 { 4, "CP-134U series", }, /* CP134U */
126 { 4, "CP-104JU series", }, /* CP104JU */
127 { 8, "Moxa UC7000 Serial", }, /* RC7000 */
128 { 8, "CP-118U series", }, /* CP118U */
129 { 2, "CP-102UL series", }, /* CP102UL */
130 { 2, "CP-102U series", }, /* CP102U */
131 { 8, "CP-118EL series", }, /* CP118EL */
132 { 8, "CP-168EL series", }, /* CP168EL */
133 { 4, "CP-104EL series", } /* CP104EL */
136 /* driver_data correspond to the lines in the structure above
137 see also ISA probe function before you change something */
138 static struct pci_device_id mxser_pcibrds
[] = {
139 { PCI_DEVICE(PCI_VENDOR_ID_MOXA
, PCI_DEVICE_ID_MOXA_C168
),
141 { PCI_DEVICE(PCI_VENDOR_ID_MOXA
, PCI_DEVICE_ID_MOXA_C104
),
143 { PCI_DEVICE(PCI_VENDOR_ID_MOXA
, PCI_DEVICE_ID_MOXA_CP132
),
145 { PCI_DEVICE(PCI_VENDOR_ID_MOXA
, PCI_DEVICE_ID_MOXA_CP114
),
147 { PCI_DEVICE(PCI_VENDOR_ID_MOXA
, PCI_DEVICE_ID_MOXA_CT114
),
149 { PCI_DEVICE(PCI_VENDOR_ID_MOXA
, PCI_DEVICE_ID_MOXA_CP102
),
151 { PCI_DEVICE(PCI_VENDOR_ID_MOXA
, PCI_DEVICE_ID_MOXA_CP104U
),
153 { PCI_DEVICE(PCI_VENDOR_ID_MOXA
, PCI_DEVICE_ID_MOXA_CP168U
),
155 { PCI_DEVICE(PCI_VENDOR_ID_MOXA
, PCI_DEVICE_ID_MOXA_CP132U
),
157 { PCI_DEVICE(PCI_VENDOR_ID_MOXA
, PCI_DEVICE_ID_MOXA_CP134U
),
159 { PCI_DEVICE(PCI_VENDOR_ID_MOXA
, PCI_DEVICE_ID_MOXA_CP104JU
),
161 { PCI_DEVICE(PCI_VENDOR_ID_MOXA
, PCI_DEVICE_ID_MOXA_RC7000
),
163 { PCI_DEVICE(PCI_VENDOR_ID_MOXA
, PCI_DEVICE_ID_MOXA_CP118U
),
165 { PCI_DEVICE(PCI_VENDOR_ID_MOXA
, PCI_DEVICE_ID_MOXA_CP102UL
),
167 { PCI_DEVICE(PCI_VENDOR_ID_MOXA
, PCI_DEVICE_ID_MOXA_CP102U
),
169 { PCI_DEVICE(PCI_VENDOR_ID_MOXA
, PCI_DEVICE_ID_MOXA_CP118EL
),
171 { PCI_DEVICE(PCI_VENDOR_ID_MOXA
, PCI_DEVICE_ID_MOXA_CP168EL
),
173 { PCI_DEVICE(PCI_VENDOR_ID_MOXA
, PCI_DEVICE_ID_MOXA_CP104EL
),
177 MODULE_DEVICE_TABLE(pci
, mxser_pcibrds
);
179 static int ioaddr
[MXSER_BOARDS
] = { 0, 0, 0, 0 };
180 static int ttymajor
= MXSERMAJOR
;
181 static int calloutmajor
= MXSERCUMAJOR
;
183 /* Variables for insmod */
185 MODULE_AUTHOR("Casper Yang");
186 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
187 module_param_array(ioaddr
, int, NULL
, 0);
188 module_param(ttymajor
, int, 0);
189 MODULE_LICENSE("GPL");
193 unsigned long rxcnt
[MXSER_PORTS
];
194 unsigned long txcnt
[MXSER_PORTS
];
201 unsigned long up_rxcnt
;
202 unsigned long up_txcnt
;
204 unsigned char hold_reason
;
207 struct mxser_mon_ext
{
208 unsigned long rx_cnt
[32];
209 unsigned long tx_cnt
[32];
210 unsigned long up_rxcnt
[32];
211 unsigned long up_txcnt
[32];
212 int modem_status
[32];
226 struct mxser_board
*board
;
227 struct tty_struct
*tty
;
229 unsigned long ioaddr
;
230 unsigned long opmode_ioaddr
;
234 int rx_trigger
; /* Rx fifo trigger level */
236 int baud_base
; /* max. speed */
238 int type
; /* UART type */
239 int flags
; /* defined in tty.h */
240 long session
; /* Session of opening process */
241 long pgrp
; /* pgrp of opening process */
243 int x_char
; /* xon/xoff character */
244 int IER
; /* Interrupt Enable Register */
245 int MCR
; /* Modem control register */
247 unsigned char stop_rx
;
248 unsigned char ldisc_stop_rx
;
252 unsigned short closing_wait
;
253 unsigned char err_shadow
;
256 int count
; /* # of fd on device */
257 int blocked_open
; /* # of blocked opens */
258 struct async_icount icount
; /* kernel counters for 4 input interrupts */
261 int read_status_mask
;
262 int ignore_status_mask
;
264 unsigned char *xmit_buf
;
269 struct ktermios normal_termios
;
270 struct ktermios callout_termios
;
272 struct mxser_mon mon_data
;
275 struct work_struct tqueue
;
276 wait_queue_head_t open_wait
;
277 wait_queue_head_t close_wait
;
278 wait_queue_head_t delta_msr_wait
;
284 const struct mxser_cardinfo
*info
;
285 unsigned long vector
;
286 unsigned long vector_mask
;
291 struct mxser_port ports
[MXSER_PORTS_PER_BOARD
];
294 struct mxser_mstatus
{
302 static struct mxser_mstatus GMStatus
[MXSER_PORTS
];
304 static int mxserBoardCAP
[MXSER_BOARDS
] = {
306 /* 0x180, 0x280, 0x200, 0x320 */
309 static struct mxser_board mxser_boards
[MXSER_BOARDS
];
310 static struct tty_driver
*mxvar_sdriver
;
311 static struct mxser_log mxvar_log
;
312 static int mxvar_diagflag
;
313 static unsigned char mxser_msr
[MXSER_PORTS
+ 1];
314 static struct mxser_mon_ext mon_data_ext
;
315 static int mxser_set_baud_method
[MXSER_PORTS
+ 1];
316 static spinlock_t gm_lock
;
318 static int CheckIsMoxaMust(int io
)
323 outb(0, io
+ UART_LCR
);
324 DISABLE_MOXA_MUST_ENCHANCE_MODE(io
);
325 oldmcr
= inb(io
+ UART_MCR
);
326 outb(0, io
+ UART_MCR
);
327 SET_MOXA_MUST_XON1_VALUE(io
, 0x11);
328 if ((hwid
= inb(io
+ UART_MCR
)) != 0) {
329 outb(oldmcr
, io
+ UART_MCR
);
330 return MOXA_OTHER_UART
;
333 GET_MOXA_MUST_HARDWARE_ID(io
, &hwid
);
334 for (i
= 1; i
< UART_INFO_NUM
; i
++) { /* 0 = OTHER_UART */
335 if (hwid
== Gpci_uart_info
[i
].type
)
338 return MOXA_OTHER_UART
;
341 static void process_txrx_fifo(struct mxser_port
*info
)
345 if ((info
->type
== PORT_16450
) || (info
->type
== PORT_8250
)) {
346 info
->rx_trigger
= 1;
347 info
->rx_high_water
= 1;
348 info
->rx_low_water
= 1;
349 info
->xmit_fifo_size
= 1;
351 for (i
= 0; i
< UART_INFO_NUM
; i
++)
352 if (info
->board
->chip_flag
== Gpci_uart_info
[i
].type
) {
353 info
->rx_trigger
= Gpci_uart_info
[i
].rx_trigger
;
354 info
->rx_low_water
= Gpci_uart_info
[i
].rx_low_water
;
355 info
->rx_high_water
= Gpci_uart_info
[i
].rx_high_water
;
356 info
->xmit_fifo_size
= Gpci_uart_info
[i
].xmit_fifo_size
;
361 static void mxser_do_softint(struct work_struct
*work
)
363 struct mxser_port
*info
= container_of(work
, struct mxser_port
, tqueue
);
364 struct tty_struct
*tty
= info
->tty
;
366 if (test_and_clear_bit(MXSER_EVENT_TXLOW
, &info
->event
))
370 static unsigned char mxser_get_msr(int baseaddr
, int mode
, int port
)
372 unsigned char status
= 0;
374 status
= inb(baseaddr
+ UART_MSR
);
376 mxser_msr
[port
] &= 0x0F;
377 mxser_msr
[port
] |= status
;
378 status
= mxser_msr
[port
];
385 static int mxser_block_til_ready(struct tty_struct
*tty
, struct file
*filp
,
386 struct mxser_port
*port
)
388 DECLARE_WAITQUEUE(wait
, current
);
394 * If non-blocking mode is set, or the port is not enabled,
395 * then make the check up front and then exit.
397 if ((filp
->f_flags
& O_NONBLOCK
) ||
398 test_bit(TTY_IO_ERROR
, &tty
->flags
)) {
399 port
->flags
|= ASYNC_NORMAL_ACTIVE
;
403 if (tty
->termios
->c_cflag
& CLOCAL
)
407 * Block waiting for the carrier detect and the line to become
408 * free (i.e., not in use by the callout). While we are in
409 * this loop, port->count is dropped by one, so that
410 * mxser_close() knows when to free things. We restore it upon
411 * exit, either normal or abnormal.
414 add_wait_queue(&port
->open_wait
, &wait
);
416 spin_lock_irqsave(&port
->slock
, flags
);
417 if (!tty_hung_up_p(filp
))
419 spin_unlock_irqrestore(&port
->slock
, flags
);
420 port
->blocked_open
++;
422 spin_lock_irqsave(&port
->slock
, flags
);
423 outb(inb(port
->ioaddr
+ UART_MCR
) |
424 UART_MCR_DTR
| UART_MCR_RTS
, port
->ioaddr
+ UART_MCR
);
425 spin_unlock_irqrestore(&port
->slock
, flags
);
426 set_current_state(TASK_INTERRUPTIBLE
);
427 if (tty_hung_up_p(filp
) || !(port
->flags
& ASYNC_INITIALIZED
)) {
428 if (port
->flags
& ASYNC_HUP_NOTIFY
)
431 retval
= -ERESTARTSYS
;
434 if (!(port
->flags
& ASYNC_CLOSING
) &&
436 (inb(port
->ioaddr
+ UART_MSR
) & UART_MSR_DCD
)))
438 if (signal_pending(current
)) {
439 retval
= -ERESTARTSYS
;
444 set_current_state(TASK_RUNNING
);
445 remove_wait_queue(&port
->open_wait
, &wait
);
446 if (!tty_hung_up_p(filp
))
448 port
->blocked_open
--;
451 port
->flags
|= ASYNC_NORMAL_ACTIVE
;
455 static int mxser_set_baud(struct mxser_port
*info
, long newspd
)
462 if (!info
->tty
|| !info
->tty
->termios
)
468 if (newspd
> info
->max_baud
)
471 info
->realbaud
= newspd
;
473 quot
= (2 * info
->baud_base
/ 269);
475 quot
= info
->baud_base
/ newspd
;
482 info
->timeout
= ((info
->xmit_fifo_size
* HZ
* 10 * quot
) / info
->baud_base
);
483 info
->timeout
+= HZ
/ 50; /* Add .02 seconds of slop */
486 spin_lock_irqsave(&info
->slock
, flags
);
487 info
->MCR
|= UART_MCR_DTR
;
488 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
489 spin_unlock_irqrestore(&info
->slock
, flags
);
491 spin_lock_irqsave(&info
->slock
, flags
);
492 info
->MCR
&= ~UART_MCR_DTR
;
493 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
494 spin_unlock_irqrestore(&info
->slock
, flags
);
498 cval
= inb(info
->ioaddr
+ UART_LCR
);
500 outb(cval
| UART_LCR_DLAB
, info
->ioaddr
+ UART_LCR
); /* set DLAB */
502 outb(quot
& 0xff, info
->ioaddr
+ UART_DLL
); /* LS of divisor */
503 outb(quot
>> 8, info
->ioaddr
+ UART_DLM
); /* MS of divisor */
504 outb(cval
, info
->ioaddr
+ UART_LCR
); /* reset DLAB */
511 * This routine is called to set the UART divisor registers to match
512 * the specified baud rate for a serial port.
514 static int mxser_change_speed(struct mxser_port
*info
,
515 struct ktermios
*old_termios
)
517 unsigned cflag
, cval
, fcr
;
519 unsigned char status
;
523 if (!info
->tty
|| !info
->tty
->termios
)
525 cflag
= info
->tty
->termios
->c_cflag
;
529 if (mxser_set_baud_method
[info
->tty
->index
] == 0) {
530 baud
= tty_get_baud_rate(info
->tty
);
531 mxser_set_baud(info
, baud
);
534 /* byte size and parity */
535 switch (cflag
& CSIZE
) {
550 break; /* too keep GCC shut... */
555 cval
|= UART_LCR_PARITY
;
556 if (!(cflag
& PARODD
))
557 cval
|= UART_LCR_EPAR
;
559 cval
|= UART_LCR_SPAR
;
561 if ((info
->type
== PORT_8250
) || (info
->type
== PORT_16450
)) {
562 if (info
->board
->chip_flag
) {
563 fcr
= UART_FCR_ENABLE_FIFO
;
564 fcr
|= MOXA_MUST_FCR_GDA_MODE_ENABLE
;
565 SET_MOXA_MUST_FIFO_VALUE(info
);
569 fcr
= UART_FCR_ENABLE_FIFO
;
570 if (info
->board
->chip_flag
) {
571 fcr
|= MOXA_MUST_FCR_GDA_MODE_ENABLE
;
572 SET_MOXA_MUST_FIFO_VALUE(info
);
574 switch (info
->rx_trigger
) {
576 fcr
|= UART_FCR_TRIGGER_1
;
579 fcr
|= UART_FCR_TRIGGER_4
;
582 fcr
|= UART_FCR_TRIGGER_8
;
585 fcr
|= UART_FCR_TRIGGER_14
;
591 /* CTS flow control flag and modem status interrupts */
592 info
->IER
&= ~UART_IER_MSI
;
593 info
->MCR
&= ~UART_MCR_AFE
;
594 if (cflag
& CRTSCTS
) {
595 info
->flags
|= ASYNC_CTS_FLOW
;
596 info
->IER
|= UART_IER_MSI
;
597 if ((info
->type
== PORT_16550A
) || (info
->board
->chip_flag
)) {
598 info
->MCR
|= UART_MCR_AFE
;
600 status
= inb(info
->ioaddr
+ UART_MSR
);
601 if (info
->tty
->hw_stopped
) {
602 if (status
& UART_MSR_CTS
) {
603 info
->tty
->hw_stopped
= 0;
604 if (info
->type
!= PORT_16550A
&&
605 !info
->board
->chip_flag
) {
606 outb(info
->IER
& ~UART_IER_THRI
,
609 info
->IER
|= UART_IER_THRI
;
610 outb(info
->IER
, info
->ioaddr
+
613 set_bit(MXSER_EVENT_TXLOW
, &info
->event
);
614 schedule_work(&info
->tqueue
); }
616 if (!(status
& UART_MSR_CTS
)) {
617 info
->tty
->hw_stopped
= 1;
618 if ((info
->type
!= PORT_16550A
) &&
619 (!info
->board
->chip_flag
)) {
620 info
->IER
&= ~UART_IER_THRI
;
621 outb(info
->IER
, info
->ioaddr
+
628 info
->flags
&= ~ASYNC_CTS_FLOW
;
630 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
631 if (cflag
& CLOCAL
) {
632 info
->flags
&= ~ASYNC_CHECK_CD
;
634 info
->flags
|= ASYNC_CHECK_CD
;
635 info
->IER
|= UART_IER_MSI
;
637 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
640 * Set up parity check flag
642 info
->read_status_mask
= UART_LSR_OE
| UART_LSR_THRE
| UART_LSR_DR
;
643 if (I_INPCK(info
->tty
))
644 info
->read_status_mask
|= UART_LSR_FE
| UART_LSR_PE
;
645 if (I_BRKINT(info
->tty
) || I_PARMRK(info
->tty
))
646 info
->read_status_mask
|= UART_LSR_BI
;
648 info
->ignore_status_mask
= 0;
650 if (I_IGNBRK(info
->tty
)) {
651 info
->ignore_status_mask
|= UART_LSR_BI
;
652 info
->read_status_mask
|= UART_LSR_BI
;
654 * If we're ignore parity and break indicators, ignore
655 * overruns too. (For real raw support).
657 if (I_IGNPAR(info
->tty
)) {
658 info
->ignore_status_mask
|=
662 info
->read_status_mask
|=
668 if (info
->board
->chip_flag
) {
669 spin_lock_irqsave(&info
->slock
, flags
);
670 SET_MOXA_MUST_XON1_VALUE(info
->ioaddr
, START_CHAR(info
->tty
));
671 SET_MOXA_MUST_XOFF1_VALUE(info
->ioaddr
, STOP_CHAR(info
->tty
));
672 if (I_IXON(info
->tty
)) {
673 ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info
->ioaddr
);
675 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info
->ioaddr
);
677 if (I_IXOFF(info
->tty
)) {
678 ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info
->ioaddr
);
680 DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info
->ioaddr
);
682 spin_unlock_irqrestore(&info
->slock
, flags
);
686 outb(fcr
, info
->ioaddr
+ UART_FCR
); /* set fcr */
687 outb(cval
, info
->ioaddr
+ UART_LCR
);
692 static void mxser_check_modem_status(struct mxser_port
*port
, int status
)
694 /* update input line counters */
695 if (status
& UART_MSR_TERI
)
697 if (status
& UART_MSR_DDSR
)
699 if (status
& UART_MSR_DDCD
)
701 if (status
& UART_MSR_DCTS
)
703 port
->mon_data
.modem_status
= status
;
704 wake_up_interruptible(&port
->delta_msr_wait
);
706 if ((port
->flags
& ASYNC_CHECK_CD
) && (status
& UART_MSR_DDCD
)) {
707 if (status
& UART_MSR_DCD
)
708 wake_up_interruptible(&port
->open_wait
);
709 schedule_work(&port
->tqueue
);
712 if (port
->flags
& ASYNC_CTS_FLOW
) {
713 if (port
->tty
->hw_stopped
) {
714 if (status
& UART_MSR_CTS
) {
715 port
->tty
->hw_stopped
= 0;
717 if ((port
->type
!= PORT_16550A
) &&
718 (!port
->board
->chip_flag
)) {
719 outb(port
->IER
& ~UART_IER_THRI
,
720 port
->ioaddr
+ UART_IER
);
721 port
->IER
|= UART_IER_THRI
;
722 outb(port
->IER
, port
->ioaddr
+
725 set_bit(MXSER_EVENT_TXLOW
, &port
->event
);
726 schedule_work(&port
->tqueue
);
729 if (!(status
& UART_MSR_CTS
)) {
730 port
->tty
->hw_stopped
= 1;
731 if (port
->type
!= PORT_16550A
&&
732 !port
->board
->chip_flag
) {
733 port
->IER
&= ~UART_IER_THRI
;
734 outb(port
->IER
, port
->ioaddr
+
742 static int mxser_startup(struct mxser_port
*info
)
747 page
= __get_free_page(GFP_KERNEL
);
751 spin_lock_irqsave(&info
->slock
, flags
);
753 if (info
->flags
& ASYNC_INITIALIZED
) {
755 spin_unlock_irqrestore(&info
->slock
, flags
);
759 if (!info
->ioaddr
|| !info
->type
) {
761 set_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
763 spin_unlock_irqrestore(&info
->slock
, flags
);
769 info
->xmit_buf
= (unsigned char *) page
;
772 * Clear the FIFO buffers and disable them
773 * (they will be reenabled in mxser_change_speed())
775 if (info
->board
->chip_flag
)
776 outb((UART_FCR_CLEAR_RCVR
|
777 UART_FCR_CLEAR_XMIT
|
778 MOXA_MUST_FCR_GDA_MODE_ENABLE
), info
->ioaddr
+ UART_FCR
);
780 outb((UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
),
781 info
->ioaddr
+ UART_FCR
);
784 * At this point there's no way the LSR could still be 0xFF;
785 * if it is, then bail out, because there's likely no UART
788 if (inb(info
->ioaddr
+ UART_LSR
) == 0xff) {
789 spin_unlock_irqrestore(&info
->slock
, flags
);
790 if (capable(CAP_SYS_ADMIN
)) {
792 set_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
799 * Clear the interrupt registers.
801 (void) inb(info
->ioaddr
+ UART_LSR
);
802 (void) inb(info
->ioaddr
+ UART_RX
);
803 (void) inb(info
->ioaddr
+ UART_IIR
);
804 (void) inb(info
->ioaddr
+ UART_MSR
);
807 * Now, initialize the UART
809 outb(UART_LCR_WLEN8
, info
->ioaddr
+ UART_LCR
); /* reset DLAB */
810 info
->MCR
= UART_MCR_DTR
| UART_MCR_RTS
;
811 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
814 * Finally, enable interrupts
816 info
->IER
= UART_IER_MSI
| UART_IER_RLSI
| UART_IER_RDI
;
818 if (info
->board
->chip_flag
)
819 info
->IER
|= MOXA_MUST_IER_EGDAI
;
820 outb(info
->IER
, info
->ioaddr
+ UART_IER
); /* enable interrupts */
823 * And clear the interrupt registers again for luck.
825 (void) inb(info
->ioaddr
+ UART_LSR
);
826 (void) inb(info
->ioaddr
+ UART_RX
);
827 (void) inb(info
->ioaddr
+ UART_IIR
);
828 (void) inb(info
->ioaddr
+ UART_MSR
);
831 clear_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
832 info
->xmit_cnt
= info
->xmit_head
= info
->xmit_tail
= 0;
835 * and set the speed of the serial port
837 spin_unlock_irqrestore(&info
->slock
, flags
);
838 mxser_change_speed(info
, NULL
);
840 info
->flags
|= ASYNC_INITIALIZED
;
845 * This routine will shutdown a serial port; interrupts maybe disabled, and
846 * DTR is dropped if the hangup on close termio flag is on.
848 static void mxser_shutdown(struct mxser_port
*info
)
852 if (!(info
->flags
& ASYNC_INITIALIZED
))
855 spin_lock_irqsave(&info
->slock
, flags
);
858 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
859 * here so the queue might never be waken up
861 wake_up_interruptible(&info
->delta_msr_wait
);
864 * Free the IRQ, if necessary
866 if (info
->xmit_buf
) {
867 free_page((unsigned long) info
->xmit_buf
);
868 info
->xmit_buf
= NULL
;
872 outb(0x00, info
->ioaddr
+ UART_IER
);
874 if (!info
->tty
|| (info
->tty
->termios
->c_cflag
& HUPCL
))
875 info
->MCR
&= ~(UART_MCR_DTR
| UART_MCR_RTS
);
876 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
878 /* clear Rx/Tx FIFO's */
879 if (info
->board
->chip_flag
)
880 outb(UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
|
881 MOXA_MUST_FCR_GDA_MODE_ENABLE
,
882 info
->ioaddr
+ UART_FCR
);
884 outb(UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
,
885 info
->ioaddr
+ UART_FCR
);
887 /* read data port to reset things */
888 (void) inb(info
->ioaddr
+ UART_RX
);
891 set_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
893 info
->flags
&= ~ASYNC_INITIALIZED
;
895 if (info
->board
->chip_flag
)
896 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info
->ioaddr
);
898 spin_unlock_irqrestore(&info
->slock
, flags
);
902 * This routine is called whenever a serial port is opened. It
903 * enables interrupts for a serial port, linking in its async structure into
904 * the IRQ chain. It also performs the serial-specific
905 * initialization for the tty structure.
907 static int mxser_open(struct tty_struct
*tty
, struct file
*filp
)
909 struct mxser_port
*info
;
912 /* initialize driver_data in case something fails */
913 tty
->driver_data
= NULL
;
916 if (line
== MXSER_PORTS
)
918 if (line
< 0 || line
> MXSER_PORTS
)
920 info
= &mxser_boards
[line
/ MXSER_PORTS_PER_BOARD
].ports
[line
% MXSER_PORTS_PER_BOARD
];
924 tty
->driver_data
= info
;
927 * Start up serial port
930 retval
= mxser_startup(info
);
934 retval
= mxser_block_til_ready(tty
, filp
, info
);
938 if ((info
->count
== 1) && (info
->flags
& ASYNC_SPLIT_TERMIOS
)) {
939 if (tty
->driver
->subtype
== SERIAL_TYPE_NORMAL
)
940 *tty
->termios
= info
->normal_termios
;
942 *tty
->termios
= info
->callout_termios
;
943 mxser_change_speed(info
, NULL
);
946 info
->session
= process_session(current
);
947 info
->pgrp
= process_group(current
);
949 /* unmark here for very high baud rate (ex. 921600 bps) used */
950 tty
->low_latency
= 1;
955 * This routine is called when the serial port gets closed. First, we
956 * wait for the last remaining data to be sent. Then, we unlink its
957 * async structure from the interrupt chain if necessary, and we free
958 * that IRQ if nothing is left in the chain.
960 static void mxser_close(struct tty_struct
*tty
, struct file
*filp
)
962 struct mxser_port
*info
= tty
->driver_data
;
964 unsigned long timeout
;
967 if (tty
->index
== MXSER_PORTS
)
972 spin_lock_irqsave(&info
->slock
, flags
);
974 if (tty_hung_up_p(filp
)) {
975 spin_unlock_irqrestore(&info
->slock
, flags
);
978 if ((tty
->count
== 1) && (info
->count
!= 1)) {
980 * Uh, oh. tty->count is 1, which means that the tty
981 * structure will be freed. Info->count should always
982 * be one in these conditions. If it's greater than
983 * one, we've got real problems, since it means the
984 * serial port won't be shutdown.
986 printk(KERN_ERR
"mxser_close: bad serial port count; "
987 "tty->count is 1, info->count is %d\n", info
->count
);
990 if (--info
->count
< 0) {
991 printk(KERN_ERR
"mxser_close: bad serial port count for "
992 "ttys%d: %d\n", tty
->index
, info
->count
);
996 spin_unlock_irqrestore(&info
->slock
, flags
);
999 info
->flags
|= ASYNC_CLOSING
;
1000 spin_unlock_irqrestore(&info
->slock
, flags
);
1002 * Save the termios structure, since this port may have
1003 * separate termios for callout and dialin.
1005 if (info
->flags
& ASYNC_NORMAL_ACTIVE
)
1006 info
->normal_termios
= *tty
->termios
;
1008 * Now we wait for the transmit buffer to clear; and we notify
1009 * the line discipline to only process XON/XOFF characters.
1012 if (info
->closing_wait
!= ASYNC_CLOSING_WAIT_NONE
)
1013 tty_wait_until_sent(tty
, info
->closing_wait
);
1015 * At this point we stop accepting input. To do this, we
1016 * disable the receive line status interrupts, and tell the
1017 * interrupt driver to stop checking the data ready bit in the
1018 * line status register.
1020 info
->IER
&= ~UART_IER_RLSI
;
1021 if (info
->board
->chip_flag
)
1022 info
->IER
&= ~MOXA_MUST_RECV_ISR
;
1024 if (info
->flags
& ASYNC_INITIALIZED
) {
1025 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1027 * Before we drop DTR, make sure the UART transmitter
1028 * has completely drained; this is especially
1029 * important if there is a transmit FIFO!
1031 timeout
= jiffies
+ HZ
;
1032 while (!(inb(info
->ioaddr
+ UART_LSR
) & UART_LSR_TEMT
)) {
1033 schedule_timeout_interruptible(5);
1034 if (time_after(jiffies
, timeout
))
1038 mxser_shutdown(info
);
1040 if (tty
->driver
->flush_buffer
)
1041 tty
->driver
->flush_buffer(tty
);
1043 tty_ldisc_flush(tty
);
1048 if (info
->blocked_open
) {
1049 if (info
->close_delay
)
1050 schedule_timeout_interruptible(info
->close_delay
);
1051 wake_up_interruptible(&info
->open_wait
);
1054 info
->flags
&= ~(ASYNC_NORMAL_ACTIVE
| ASYNC_CLOSING
);
1055 wake_up_interruptible(&info
->close_wait
);
1059 static int mxser_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
1062 struct mxser_port
*info
= tty
->driver_data
;
1063 unsigned long flags
;
1065 if (!info
->xmit_buf
)
1069 c
= min_t(int, count
, min(SERIAL_XMIT_SIZE
- info
->xmit_cnt
- 1,
1070 SERIAL_XMIT_SIZE
- info
->xmit_head
));
1074 memcpy(info
->xmit_buf
+ info
->xmit_head
, buf
, c
);
1075 spin_lock_irqsave(&info
->slock
, flags
);
1076 info
->xmit_head
= (info
->xmit_head
+ c
) &
1077 (SERIAL_XMIT_SIZE
- 1);
1078 info
->xmit_cnt
+= c
;
1079 spin_unlock_irqrestore(&info
->slock
, flags
);
1086 if (info
->xmit_cnt
&& !tty
->stopped
) {
1087 if (!tty
->hw_stopped
||
1088 (info
->type
== PORT_16550A
) ||
1089 (info
->board
->chip_flag
)) {
1090 spin_lock_irqsave(&info
->slock
, flags
);
1091 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+
1093 info
->IER
|= UART_IER_THRI
;
1094 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1095 spin_unlock_irqrestore(&info
->slock
, flags
);
1101 static void mxser_put_char(struct tty_struct
*tty
, unsigned char ch
)
1103 struct mxser_port
*info
= tty
->driver_data
;
1104 unsigned long flags
;
1106 if (!info
->xmit_buf
)
1109 if (info
->xmit_cnt
>= SERIAL_XMIT_SIZE
- 1)
1112 spin_lock_irqsave(&info
->slock
, flags
);
1113 info
->xmit_buf
[info
->xmit_head
++] = ch
;
1114 info
->xmit_head
&= SERIAL_XMIT_SIZE
- 1;
1116 spin_unlock_irqrestore(&info
->slock
, flags
);
1117 if (!tty
->stopped
) {
1118 if (!tty
->hw_stopped
||
1119 (info
->type
== PORT_16550A
) ||
1120 info
->board
->chip_flag
) {
1121 spin_lock_irqsave(&info
->slock
, flags
);
1122 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
1123 info
->IER
|= UART_IER_THRI
;
1124 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1125 spin_unlock_irqrestore(&info
->slock
, flags
);
1131 static void mxser_flush_chars(struct tty_struct
*tty
)
1133 struct mxser_port
*info
= tty
->driver_data
;
1134 unsigned long flags
;
1136 if (info
->xmit_cnt
<= 0 ||
1140 (info
->type
!= PORT_16550A
) &&
1141 (!info
->board
->chip_flag
)
1145 spin_lock_irqsave(&info
->slock
, flags
);
1147 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
1148 info
->IER
|= UART_IER_THRI
;
1149 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1151 spin_unlock_irqrestore(&info
->slock
, flags
);
1154 static int mxser_write_room(struct tty_struct
*tty
)
1156 struct mxser_port
*info
= tty
->driver_data
;
1159 ret
= SERIAL_XMIT_SIZE
- info
->xmit_cnt
- 1;
1165 static int mxser_chars_in_buffer(struct tty_struct
*tty
)
1167 struct mxser_port
*info
= tty
->driver_data
;
1168 return info
->xmit_cnt
;
1171 static void mxser_flush_buffer(struct tty_struct
*tty
)
1173 struct mxser_port
*info
= tty
->driver_data
;
1175 unsigned long flags
;
1178 spin_lock_irqsave(&info
->slock
, flags
);
1179 info
->xmit_cnt
= info
->xmit_head
= info
->xmit_tail
= 0;
1181 fcr
= inb(info
->ioaddr
+ UART_FCR
);
1182 outb((fcr
| UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
),
1183 info
->ioaddr
+ UART_FCR
);
1184 outb(fcr
, info
->ioaddr
+ UART_FCR
);
1186 spin_unlock_irqrestore(&info
->slock
, flags
);
1192 * ------------------------------------------------------------
1193 * friends of mxser_ioctl()
1194 * ------------------------------------------------------------
1196 static int mxser_get_serial_info(struct mxser_port
*info
,
1197 struct serial_struct __user
*retinfo
)
1199 struct serial_struct tmp
;
1203 memset(&tmp
, 0, sizeof(tmp
));
1204 tmp
.type
= info
->type
;
1205 tmp
.line
= info
->tty
->index
;
1206 tmp
.port
= info
->ioaddr
;
1207 tmp
.irq
= info
->board
->irq
;
1208 tmp
.flags
= info
->flags
;
1209 tmp
.baud_base
= info
->baud_base
;
1210 tmp
.close_delay
= info
->close_delay
;
1211 tmp
.closing_wait
= info
->closing_wait
;
1212 tmp
.custom_divisor
= info
->custom_divisor
;
1214 if (copy_to_user(retinfo
, &tmp
, sizeof(*retinfo
)))
1219 static int mxser_set_serial_info(struct mxser_port
*info
,
1220 struct serial_struct __user
*new_info
)
1222 struct serial_struct new_serial
;
1226 if (!new_info
|| !info
->ioaddr
)
1228 if (copy_from_user(&new_serial
, new_info
, sizeof(new_serial
)))
1231 if ((new_serial
.irq
!= info
->board
->irq
) ||
1232 (new_serial
.port
!= info
->ioaddr
) ||
1233 (new_serial
.custom_divisor
!= info
->custom_divisor
) ||
1234 (new_serial
.baud_base
!= info
->baud_base
))
1237 flags
= info
->flags
& ASYNC_SPD_MASK
;
1239 if (!capable(CAP_SYS_ADMIN
)) {
1240 if ((new_serial
.baud_base
!= info
->baud_base
) ||
1241 (new_serial
.close_delay
!= info
->close_delay
) ||
1242 ((new_serial
.flags
& ~ASYNC_USR_MASK
) != (info
->flags
& ~ASYNC_USR_MASK
)))
1244 info
->flags
= ((info
->flags
& ~ASYNC_USR_MASK
) |
1245 (new_serial
.flags
& ASYNC_USR_MASK
));
1248 * OK, past this point, all the error checking has been done.
1249 * At this point, we start making changes.....
1251 info
->flags
= ((info
->flags
& ~ASYNC_FLAGS
) |
1252 (new_serial
.flags
& ASYNC_FLAGS
));
1253 info
->close_delay
= new_serial
.close_delay
* HZ
/ 100;
1254 info
->closing_wait
= new_serial
.closing_wait
* HZ
/ 100;
1255 info
->tty
->low_latency
=
1256 (info
->flags
& ASYNC_LOW_LATENCY
) ? 1 : 0;
1257 info
->tty
->low_latency
= 0;
1260 info
->type
= new_serial
.type
;
1262 process_txrx_fifo(info
);
1264 if (info
->flags
& ASYNC_INITIALIZED
) {
1265 if (flags
!= (info
->flags
& ASYNC_SPD_MASK
))
1266 mxser_change_speed(info
, NULL
);
1268 retval
= mxser_startup(info
);
1274 * mxser_get_lsr_info - get line status register info
1276 * Purpose: Let user call ioctl() to get info when the UART physically
1277 * is emptied. On bus types like RS485, the transmitter must
1278 * release the bus after transmitting. This must be done when
1279 * the transmit shift register is empty, not be done when the
1280 * transmit holding register is empty. This functionality
1281 * allows an RS485 driver to be written in user space.
1283 static int mxser_get_lsr_info(struct mxser_port
*info
,
1284 unsigned int __user
*value
)
1286 unsigned char status
;
1287 unsigned int result
;
1288 unsigned long flags
;
1290 spin_lock_irqsave(&info
->slock
, flags
);
1291 status
= inb(info
->ioaddr
+ UART_LSR
);
1292 spin_unlock_irqrestore(&info
->slock
, flags
);
1293 result
= ((status
& UART_LSR_TEMT
) ? TIOCSER_TEMT
: 0);
1294 return put_user(result
, value
);
1298 * This routine sends a break character out the serial port.
1300 static void mxser_send_break(struct mxser_port
*info
, int duration
)
1302 unsigned long flags
;
1306 set_current_state(TASK_INTERRUPTIBLE
);
1307 spin_lock_irqsave(&info
->slock
, flags
);
1308 outb(inb(info
->ioaddr
+ UART_LCR
) | UART_LCR_SBC
,
1309 info
->ioaddr
+ UART_LCR
);
1310 spin_unlock_irqrestore(&info
->slock
, flags
);
1311 schedule_timeout(duration
);
1312 spin_lock_irqsave(&info
->slock
, flags
);
1313 outb(inb(info
->ioaddr
+ UART_LCR
) & ~UART_LCR_SBC
,
1314 info
->ioaddr
+ UART_LCR
);
1315 spin_unlock_irqrestore(&info
->slock
, flags
);
1318 static int mxser_tiocmget(struct tty_struct
*tty
, struct file
*file
)
1320 struct mxser_port
*info
= tty
->driver_data
;
1321 unsigned char control
, status
;
1322 unsigned long flags
;
1325 if (tty
->index
== MXSER_PORTS
)
1326 return -ENOIOCTLCMD
;
1327 if (test_bit(TTY_IO_ERROR
, &tty
->flags
))
1330 control
= info
->MCR
;
1332 spin_lock_irqsave(&info
->slock
, flags
);
1333 status
= inb(info
->ioaddr
+ UART_MSR
);
1334 if (status
& UART_MSR_ANY_DELTA
)
1335 mxser_check_modem_status(info
, status
);
1336 spin_unlock_irqrestore(&info
->slock
, flags
);
1337 return ((control
& UART_MCR_RTS
) ? TIOCM_RTS
: 0) |
1338 ((control
& UART_MCR_DTR
) ? TIOCM_DTR
: 0) |
1339 ((status
& UART_MSR_DCD
) ? TIOCM_CAR
: 0) |
1340 ((status
& UART_MSR_RI
) ? TIOCM_RNG
: 0) |
1341 ((status
& UART_MSR_DSR
) ? TIOCM_DSR
: 0) |
1342 ((status
& UART_MSR_CTS
) ? TIOCM_CTS
: 0);
1345 static int mxser_tiocmset(struct tty_struct
*tty
, struct file
*file
,
1346 unsigned int set
, unsigned int clear
)
1348 struct mxser_port
*info
= tty
->driver_data
;
1349 unsigned long flags
;
1352 if (tty
->index
== MXSER_PORTS
)
1353 return -ENOIOCTLCMD
;
1354 if (test_bit(TTY_IO_ERROR
, &tty
->flags
))
1357 spin_lock_irqsave(&info
->slock
, flags
);
1359 if (set
& TIOCM_RTS
)
1360 info
->MCR
|= UART_MCR_RTS
;
1361 if (set
& TIOCM_DTR
)
1362 info
->MCR
|= UART_MCR_DTR
;
1364 if (clear
& TIOCM_RTS
)
1365 info
->MCR
&= ~UART_MCR_RTS
;
1366 if (clear
& TIOCM_DTR
)
1367 info
->MCR
&= ~UART_MCR_DTR
;
1369 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
1370 spin_unlock_irqrestore(&info
->slock
, flags
);
1374 static int mxser_program_mode(int port
)
1378 spin_lock(&gm_lock
);
1386 spin_unlock(&gm_lock
);
1388 id
= inb(port
+ 1) & 0x1F;
1389 if ((id
!= C168_ASIC_ID
) &&
1390 (id
!= C104_ASIC_ID
) &&
1391 (id
!= C102_ASIC_ID
) &&
1392 (id
!= CI132_ASIC_ID
) &&
1393 (id
!= CI134_ASIC_ID
) &&
1394 (id
!= CI104J_ASIC_ID
))
1396 for (i
= 0, j
= 0; i
< 4; i
++) {
1400 } else if ((j
== 1) && (n
== 1)) {
1411 static void mxser_normal_mode(int port
)
1415 outb(0xA5, port
+ 1);
1416 outb(0x80, port
+ 3);
1417 outb(12, port
+ 0); /* 9600 bps */
1419 outb(0x03, port
+ 3); /* 8 data bits */
1420 outb(0x13, port
+ 4); /* loop back mode */
1421 for (i
= 0; i
< 16; i
++) {
1423 if ((n
& 0x61) == 0x60)
1428 outb(0x00, port
+ 4);
1431 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
1432 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
1433 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
1434 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
1435 #define EN_CCMD 0x000 /* Chip's command register */
1436 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
1437 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
1438 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
1439 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
1440 #define EN0_DCFG 0x00E /* Data configuration reg WR */
1441 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
1442 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
1443 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
1444 static int mxser_read_register(int port
, unsigned short *regs
)
1446 int i
, k
, value
, id
;
1449 id
= mxser_program_mode(port
);
1452 for (i
= 0; i
< 14; i
++) {
1453 k
= (i
& 0x3F) | 0x180;
1454 for (j
= 0x100; j
> 0; j
>>= 1) {
1455 outb(CHIP_CS
, port
);
1457 outb(CHIP_CS
| CHIP_DO
, port
);
1458 outb(CHIP_CS
| CHIP_DO
| CHIP_SK
, port
); /* A? bit of read */
1460 outb(CHIP_CS
, port
);
1461 outb(CHIP_CS
| CHIP_SK
, port
); /* A? bit of read */
1466 for (k
= 0, j
= 0x8000; k
< 16; k
++, j
>>= 1) {
1467 outb(CHIP_CS
, port
);
1468 outb(CHIP_CS
| CHIP_SK
, port
);
1469 if (inb(port
) & CHIP_DI
)
1475 mxser_normal_mode(port
);
1479 static int mxser_ioctl_special(unsigned int cmd
, void __user
*argp
)
1481 struct mxser_port
*port
;
1487 /* if (copy_to_user(argp, mxsercfg,
1488 sizeof(struct mxser_hwconf) * 4))
1492 case MOXA_GET_MAJOR
:
1493 if (copy_to_user(argp
, &ttymajor
, sizeof(int)))
1497 case MOXA_GET_CUMAJOR
:
1498 if (copy_to_user(argp
, &calloutmajor
, sizeof(int)))
1502 case MOXA_CHKPORTENABLE
:
1505 for (i
= 0; i
< MXSER_BOARDS
; i
++)
1506 for (j
= 0; j
< MXSER_PORTS_PER_BOARD
; j
++)
1507 if (mxser_boards
[i
].ports
[j
].ioaddr
)
1510 return put_user(result
, (unsigned long __user
*)argp
);
1511 case MOXA_GETDATACOUNT
:
1512 if (copy_to_user(argp
, &mxvar_log
, sizeof(mxvar_log
)))
1515 case MOXA_GETMSTATUS
:
1516 for (i
= 0; i
< MXSER_BOARDS
; i
++)
1517 for (j
= 0; j
< MXSER_PORTS_PER_BOARD
; j
++) {
1518 port
= &mxser_boards
[i
].ports
[j
];
1521 if (!port
->ioaddr
) {
1522 GMStatus
[i
].dcd
= 0;
1523 GMStatus
[i
].dsr
= 0;
1524 GMStatus
[i
].cts
= 0;
1528 if (!port
->tty
|| !port
->tty
->termios
)
1530 port
->normal_termios
.c_cflag
;
1533 port
->tty
->termios
->c_cflag
;
1535 status
= inb(port
->ioaddr
+ UART_MSR
);
1536 if (status
& 0x80 /*UART_MSR_DCD */ )
1537 GMStatus
[i
].dcd
= 1;
1539 GMStatus
[i
].dcd
= 0;
1541 if (status
& 0x20 /*UART_MSR_DSR */ )
1542 GMStatus
[i
].dsr
= 1;
1544 GMStatus
[i
].dsr
= 0;
1547 if (status
& 0x10 /*UART_MSR_CTS */ )
1548 GMStatus
[i
].cts
= 1;
1550 GMStatus
[i
].cts
= 0;
1552 if (copy_to_user(argp
, GMStatus
,
1553 sizeof(struct mxser_mstatus
) * MXSER_PORTS
))
1556 case MOXA_ASPP_MON_EXT
: {
1557 int status
, p
, shiftbit
;
1558 unsigned long opmode
;
1559 unsigned cflag
, iflag
;
1561 for (i
= 0; i
< MXSER_BOARDS
; i
++)
1562 for (j
= 0; j
< MXSER_PORTS_PER_BOARD
; j
++) {
1563 port
= &mxser_boards
[i
].ports
[j
];
1567 status
= mxser_get_msr(port
->ioaddr
, 0, i
);
1569 if (status
& UART_MSR_TERI
)
1571 if (status
& UART_MSR_DDSR
)
1573 if (status
& UART_MSR_DDCD
)
1575 if (status
& UART_MSR_DCTS
)
1578 port
->mon_data
.modem_status
= status
;
1579 mon_data_ext
.rx_cnt
[i
] = port
->mon_data
.rxcnt
;
1580 mon_data_ext
.tx_cnt
[i
] = port
->mon_data
.txcnt
;
1581 mon_data_ext
.up_rxcnt
[i
] =
1582 port
->mon_data
.up_rxcnt
;
1583 mon_data_ext
.up_txcnt
[i
] =
1584 port
->mon_data
.up_txcnt
;
1585 mon_data_ext
.modem_status
[i
] =
1586 port
->mon_data
.modem_status
;
1587 mon_data_ext
.baudrate
[i
] = port
->realbaud
;
1589 if (!port
->tty
|| !port
->tty
->termios
) {
1590 cflag
= port
->normal_termios
.c_cflag
;
1591 iflag
= port
->normal_termios
.c_iflag
;
1593 cflag
= port
->tty
->termios
->c_cflag
;
1594 iflag
= port
->tty
->termios
->c_iflag
;
1597 mon_data_ext
.databits
[i
] = cflag
& CSIZE
;
1599 mon_data_ext
.stopbits
[i
] = cflag
& CSTOPB
;
1601 mon_data_ext
.parity
[i
] =
1602 cflag
& (PARENB
| PARODD
| CMSPAR
);
1604 mon_data_ext
.flowctrl
[i
] = 0x00;
1606 if (cflag
& CRTSCTS
)
1607 mon_data_ext
.flowctrl
[i
] |= 0x03;
1609 if (iflag
& (IXON
| IXOFF
))
1610 mon_data_ext
.flowctrl
[i
] |= 0x0C;
1612 if (port
->type
== PORT_16550A
)
1613 mon_data_ext
.fifo
[i
] = 1;
1615 mon_data_ext
.fifo
[i
] = 0;
1619 opmode
= inb(port
->opmode_ioaddr
) >> shiftbit
;
1620 opmode
&= OP_MODE_MASK
;
1622 mon_data_ext
.iftype
[i
] = opmode
;
1625 if (copy_to_user(argp
, &mon_data_ext
,
1626 sizeof(mon_data_ext
)))
1632 return -ENOIOCTLCMD
;
1637 static int mxser_ioctl(struct tty_struct
*tty
, struct file
*file
,
1638 unsigned int cmd
, unsigned long arg
)
1640 struct mxser_port
*info
= tty
->driver_data
;
1641 struct async_icount cprev
, cnow
; /* kernel counter temps */
1642 struct serial_icounter_struct __user
*p_cuser
;
1643 unsigned long templ
;
1644 unsigned long flags
;
1645 void __user
*argp
= (void __user
*)arg
;
1648 if (tty
->index
== MXSER_PORTS
)
1649 return mxser_ioctl_special(cmd
, argp
);
1651 if (cmd
== MOXA_SET_OP_MODE
|| cmd
== MOXA_GET_OP_MODE
) {
1653 unsigned long opmode
;
1654 static unsigned char ModeMask
[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1656 unsigned char val
, mask
;
1659 if (cmd
== MOXA_SET_OP_MODE
) {
1660 if (get_user(opmode
, (int __user
*) argp
))
1662 if (opmode
!= RS232_MODE
&&
1663 opmode
!= RS485_2WIRE_MODE
&&
1664 opmode
!= RS422_MODE
&&
1665 opmode
!= RS485_4WIRE_MODE
)
1669 val
= inb(info
->opmode_ioaddr
);
1671 val
|= (opmode
<< shiftbit
);
1672 outb(val
, info
->opmode_ioaddr
);
1675 opmode
= inb(info
->opmode_ioaddr
) >> shiftbit
;
1676 opmode
&= OP_MODE_MASK
;
1677 if (copy_to_user(argp
, &opmode
, sizeof(int)))
1683 if (cmd
!= TIOCGSERIAL
&& cmd
!= TIOCMIWAIT
&& cmd
!= TIOCGICOUNT
&&
1684 test_bit(TTY_IO_ERROR
, &tty
->flags
))
1688 case TCSBRK
: /* SVID version: non-zero arg --> no break */
1689 retval
= tty_check_change(tty
);
1692 tty_wait_until_sent(tty
, 0);
1694 mxser_send_break(info
, HZ
/ 4); /* 1/4 second */
1696 case TCSBRKP
: /* support for POSIX tcsendbreak() */
1697 retval
= tty_check_change(tty
);
1700 tty_wait_until_sent(tty
, 0);
1701 mxser_send_break(info
, arg
? arg
* (HZ
/ 10) : HZ
/ 4);
1704 return put_user(C_CLOCAL(tty
) ? 1 : 0, (unsigned long __user
*)argp
);
1706 if (get_user(templ
, (unsigned long __user
*) argp
))
1709 tty
->termios
->c_cflag
= ((tty
->termios
->c_cflag
& ~CLOCAL
) | (arg
? CLOCAL
: 0));
1712 return mxser_get_serial_info(info
, argp
);
1714 return mxser_set_serial_info(info
, argp
);
1715 case TIOCSERGETLSR
: /* Get line status register */
1716 return mxser_get_lsr_info(info
, argp
);
1718 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1719 * - mask passed in arg for lines of interest
1720 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1721 * Caller should use TIOCGICOUNT to see which one it was
1724 DECLARE_WAITQUEUE(wait
, current
);
1726 spin_lock_irqsave(&info
->slock
, flags
);
1727 cprev
= info
->icount
; /* note the counters on entry */
1728 spin_unlock_irqrestore(&info
->slock
, flags
);
1730 add_wait_queue(&info
->delta_msr_wait
, &wait
);
1732 spin_lock_irqsave(&info
->slock
, flags
);
1733 cnow
= info
->icount
; /* atomic copy */
1734 spin_unlock_irqrestore(&info
->slock
, flags
);
1736 set_current_state(TASK_INTERRUPTIBLE
);
1737 if (((arg
& TIOCM_RNG
) &&
1738 (cnow
.rng
!= cprev
.rng
)) ||
1739 ((arg
& TIOCM_DSR
) &&
1740 (cnow
.dsr
!= cprev
.dsr
)) ||
1741 ((arg
& TIOCM_CD
) &&
1742 (cnow
.dcd
!= cprev
.dcd
)) ||
1743 ((arg
& TIOCM_CTS
) &&
1744 (cnow
.cts
!= cprev
.cts
))) {
1748 /* see if a signal did it */
1749 if (signal_pending(current
)) {
1755 current
->state
= TASK_RUNNING
;
1756 remove_wait_queue(&info
->delta_msr_wait
, &wait
);
1761 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1762 * Return: write counters to the user passed counter struct
1763 * NB: both 1->0 and 0->1 transitions are counted except for
1764 * RI where only 0->1 is counted.
1767 spin_lock_irqsave(&info
->slock
, flags
);
1768 cnow
= info
->icount
;
1769 spin_unlock_irqrestore(&info
->slock
, flags
);
1771 if (put_user(cnow
.frame
, &p_cuser
->frame
))
1773 if (put_user(cnow
.brk
, &p_cuser
->brk
))
1775 if (put_user(cnow
.overrun
, &p_cuser
->overrun
))
1777 if (put_user(cnow
.buf_overrun
, &p_cuser
->buf_overrun
))
1779 if (put_user(cnow
.parity
, &p_cuser
->parity
))
1781 if (put_user(cnow
.rx
, &p_cuser
->rx
))
1783 if (put_user(cnow
.tx
, &p_cuser
->tx
))
1785 put_user(cnow
.cts
, &p_cuser
->cts
);
1786 put_user(cnow
.dsr
, &p_cuser
->dsr
);
1787 put_user(cnow
.rng
, &p_cuser
->rng
);
1788 put_user(cnow
.dcd
, &p_cuser
->dcd
);
1790 case MOXA_HighSpeedOn
:
1791 return put_user(info
->baud_base
!= 115200 ? 1 : 0, (int __user
*)argp
);
1792 case MOXA_SDS_RSTICOUNTER
:
1793 info
->mon_data
.rxcnt
= 0;
1794 info
->mon_data
.txcnt
= 0;
1796 case MOXA_ASPP_SETBAUD
:{
1798 if (get_user(baud
, (long __user
*)argp
))
1800 mxser_set_baud(info
, baud
);
1803 case MOXA_ASPP_GETBAUD
:
1804 if (copy_to_user(argp
, &info
->realbaud
, sizeof(long)))
1809 case MOXA_ASPP_OQUEUE
:{
1812 len
= mxser_chars_in_buffer(tty
);
1814 lsr
= inb(info
->ioaddr
+ UART_LSR
) & UART_LSR_TEMT
;
1816 len
+= (lsr
? 0 : 1);
1818 if (copy_to_user(argp
, &len
, sizeof(int)))
1823 case MOXA_ASPP_MON
: {
1826 status
= mxser_get_msr(info
->ioaddr
, 1, tty
->index
);
1827 mxser_check_modem_status(info
, status
);
1829 mcr
= inb(info
->ioaddr
+ UART_MCR
);
1830 if (mcr
& MOXA_MUST_MCR_XON_FLAG
)
1831 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_XOFFHOLD
;
1833 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_XOFFHOLD
;
1835 if (mcr
& MOXA_MUST_MCR_TX_XON
)
1836 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_XOFFXENT
;
1838 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_XOFFXENT
;
1840 if (info
->tty
->hw_stopped
)
1841 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_CTSHOLD
;
1843 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_CTSHOLD
;
1845 if (copy_to_user(argp
, &info
->mon_data
,
1846 sizeof(struct mxser_mon
)))
1851 case MOXA_ASPP_LSTATUS
: {
1852 if (copy_to_user(argp
, &info
->err_shadow
,
1853 sizeof(unsigned char)))
1856 info
->err_shadow
= 0;
1859 case MOXA_SET_BAUD_METHOD
: {
1862 if (get_user(method
, (int __user
*)argp
))
1864 mxser_set_baud_method
[tty
->index
] = method
;
1865 if (copy_to_user(argp
, &method
, sizeof(int)))
1871 return -ENOIOCTLCMD
;
1876 static void mxser_stoprx(struct tty_struct
*tty
)
1878 struct mxser_port
*info
= tty
->driver_data
;
1880 info
->ldisc_stop_rx
= 1;
1882 if (info
->board
->chip_flag
) {
1883 info
->IER
&= ~MOXA_MUST_RECV_ISR
;
1884 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1886 info
->x_char
= STOP_CHAR(tty
);
1887 outb(0, info
->ioaddr
+ UART_IER
);
1888 info
->IER
|= UART_IER_THRI
;
1889 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1893 if (info
->tty
->termios
->c_cflag
& CRTSCTS
) {
1894 info
->MCR
&= ~UART_MCR_RTS
;
1895 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
1900 * This routine is called by the upper-layer tty layer to signal that
1901 * incoming characters should be throttled.
1903 static void mxser_throttle(struct tty_struct
*tty
)
1908 static void mxser_unthrottle(struct tty_struct
*tty
)
1910 struct mxser_port
*info
= tty
->driver_data
;
1913 info
->ldisc_stop_rx
= 0;
1918 if (info
->board
->chip_flag
) {
1919 info
->IER
|= MOXA_MUST_RECV_ISR
;
1920 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1922 info
->x_char
= START_CHAR(tty
);
1923 outb(0, info
->ioaddr
+ UART_IER
);
1924 info
->IER
|= UART_IER_THRI
;
1925 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1930 if (info
->tty
->termios
->c_cflag
& CRTSCTS
) {
1931 info
->MCR
|= UART_MCR_RTS
;
1932 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
1937 * mxser_stop() and mxser_start()
1939 * This routines are called before setting or resetting tty->stopped.
1940 * They enable or disable transmitter interrupts, as necessary.
1942 static void mxser_stop(struct tty_struct
*tty
)
1944 struct mxser_port
*info
= tty
->driver_data
;
1945 unsigned long flags
;
1947 spin_lock_irqsave(&info
->slock
, flags
);
1948 if (info
->IER
& UART_IER_THRI
) {
1949 info
->IER
&= ~UART_IER_THRI
;
1950 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1952 spin_unlock_irqrestore(&info
->slock
, flags
);
1955 static void mxser_start(struct tty_struct
*tty
)
1957 struct mxser_port
*info
= tty
->driver_data
;
1958 unsigned long flags
;
1960 spin_lock_irqsave(&info
->slock
, flags
);
1961 if (info
->xmit_cnt
&& info
->xmit_buf
) {
1962 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
1963 info
->IER
|= UART_IER_THRI
;
1964 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1966 spin_unlock_irqrestore(&info
->slock
, flags
);
1969 static void mxser_set_termios(struct tty_struct
*tty
, struct ktermios
*old_termios
)
1971 struct mxser_port
*info
= tty
->driver_data
;
1972 unsigned long flags
;
1974 if ((tty
->termios
->c_cflag
!= old_termios
->c_cflag
) ||
1975 (RELEVANT_IFLAG(tty
->termios
->c_iflag
) != RELEVANT_IFLAG(old_termios
->c_iflag
))) {
1977 mxser_change_speed(info
, old_termios
);
1979 if ((old_termios
->c_cflag
& CRTSCTS
) &&
1980 !(tty
->termios
->c_cflag
& CRTSCTS
)) {
1981 tty
->hw_stopped
= 0;
1986 /* Handle sw stopped */
1987 if ((old_termios
->c_iflag
& IXON
) &&
1988 !(tty
->termios
->c_iflag
& IXON
)) {
1991 if (info
->board
->chip_flag
) {
1992 spin_lock_irqsave(&info
->slock
, flags
);
1993 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info
->ioaddr
);
1994 spin_unlock_irqrestore(&info
->slock
, flags
);
2002 * mxser_wait_until_sent() --- wait until the transmitter is empty
2004 static void mxser_wait_until_sent(struct tty_struct
*tty
, int timeout
)
2006 struct mxser_port
*info
= tty
->driver_data
;
2007 unsigned long orig_jiffies
, char_time
;
2010 if (info
->type
== PORT_UNKNOWN
)
2013 if (info
->xmit_fifo_size
== 0)
2014 return; /* Just in case.... */
2016 orig_jiffies
= jiffies
;
2018 * Set the check interval to be 1/5 of the estimated time to
2019 * send a single character, and make it at least 1. The check
2020 * interval should also be less than the timeout.
2022 * Note: we have to use pretty tight timings here to satisfy
2025 char_time
= (info
->timeout
- HZ
/ 50) / info
->xmit_fifo_size
;
2026 char_time
= char_time
/ 5;
2029 if (timeout
&& timeout
< char_time
)
2030 char_time
= timeout
;
2032 * If the transmitter hasn't cleared in twice the approximate
2033 * amount of time to send the entire FIFO, it probably won't
2034 * ever clear. This assumes the UART isn't doing flow
2035 * control, which is currently the case. Hence, if it ever
2036 * takes longer than info->timeout, this is probably due to a
2037 * UART bug of some kind. So, we clamp the timeout parameter at
2040 if (!timeout
|| timeout
> 2 * info
->timeout
)
2041 timeout
= 2 * info
->timeout
;
2042 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2043 printk(KERN_DEBUG
"In rs_wait_until_sent(%d) check=%lu...",
2044 timeout
, char_time
);
2045 printk("jiff=%lu...", jiffies
);
2047 while (!((lsr
= inb(info
->ioaddr
+ UART_LSR
)) & UART_LSR_TEMT
)) {
2048 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2049 printk("lsr = %d (jiff=%lu)...", lsr
, jiffies
);
2051 schedule_timeout_interruptible(char_time
);
2052 if (signal_pending(current
))
2054 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2057 set_current_state(TASK_RUNNING
);
2059 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2060 printk("lsr = %d (jiff=%lu)...done\n", lsr
, jiffies
);
2065 * This routine is called by tty_hangup() when a hangup is signaled.
2067 void mxser_hangup(struct tty_struct
*tty
)
2069 struct mxser_port
*info
= tty
->driver_data
;
2071 mxser_flush_buffer(tty
);
2072 mxser_shutdown(info
);
2075 info
->flags
&= ~ASYNC_NORMAL_ACTIVE
;
2077 wake_up_interruptible(&info
->open_wait
);
2081 * mxser_rs_break() --- routine which turns the break handling on or off
2083 static void mxser_rs_break(struct tty_struct
*tty
, int break_state
)
2085 struct mxser_port
*info
= tty
->driver_data
;
2086 unsigned long flags
;
2088 spin_lock_irqsave(&info
->slock
, flags
);
2089 if (break_state
== -1)
2090 outb(inb(info
->ioaddr
+ UART_LCR
) | UART_LCR_SBC
,
2091 info
->ioaddr
+ UART_LCR
);
2093 outb(inb(info
->ioaddr
+ UART_LCR
) & ~UART_LCR_SBC
,
2094 info
->ioaddr
+ UART_LCR
);
2095 spin_unlock_irqrestore(&info
->slock
, flags
);
2098 static void mxser_receive_chars(struct mxser_port
*port
, int *status
)
2100 struct tty_struct
*tty
= port
->tty
;
2101 unsigned char ch
, gdl
;
2106 unsigned long flags
;
2108 spin_lock_irqsave(&port
->slock
, flags
);
2110 recv_room
= tty
->receive_room
;
2111 if ((recv_room
== 0) && (!port
->ldisc_stop_rx
))
2114 if (port
->board
->chip_flag
!= MOXA_OTHER_UART
) {
2116 if (*status
& UART_LSR_SPECIAL
)
2118 if (port
->board
->chip_flag
== MOXA_MUST_MU860_HWID
&&
2119 (*status
& MOXA_MUST_LSR_RERR
))
2121 if (*status
& MOXA_MUST_LSR_RERR
)
2124 gdl
= inb(port
->ioaddr
+ MOXA_MUST_GDL_REGISTER
);
2126 if (port
->board
->chip_flag
== MOXA_MUST_MU150_HWID
)
2127 gdl
&= MOXA_MUST_GDL_MASK
;
2128 if (gdl
>= recv_room
) {
2129 if (!port
->ldisc_stop_rx
)
2133 ch
= inb(port
->ioaddr
+ UART_RX
);
2134 tty_insert_flip_char(tty
, ch
, 0);
2145 ch
= inb(port
->ioaddr
+ UART_RX
);
2146 if (port
->board
->chip_flag
&& (*status
& UART_LSR_OE
))
2147 outb(0x23, port
->ioaddr
+ UART_FCR
);
2148 *status
&= port
->read_status_mask
;
2149 if (*status
& port
->ignore_status_mask
) {
2150 if (++ignored
> 100)
2154 if (*status
& UART_LSR_SPECIAL
) {
2155 if (*status
& UART_LSR_BI
) {
2159 if (port
->flags
& ASYNC_SAK
)
2161 } else if (*status
& UART_LSR_PE
) {
2163 port
->icount
.parity
++;
2164 } else if (*status
& UART_LSR_FE
) {
2166 port
->icount
.frame
++;
2167 } else if (*status
& UART_LSR_OE
) {
2169 port
->icount
.overrun
++;
2172 tty_insert_flip_char(tty
, ch
, flag
);
2174 if (cnt
>= recv_room
) {
2175 if (!port
->ldisc_stop_rx
)
2182 if (port
->board
->chip_flag
)
2185 *status
= inb(port
->ioaddr
+ UART_LSR
);
2186 } while (*status
& UART_LSR_DR
);
2189 mxvar_log
.rxcnt
[port
->tty
->index
] += cnt
;
2190 port
->mon_data
.rxcnt
+= cnt
;
2191 port
->mon_data
.up_rxcnt
+= cnt
;
2192 spin_unlock_irqrestore(&port
->slock
, flags
);
2194 tty_flip_buffer_push(tty
);
2197 static void mxser_transmit_chars(struct mxser_port
*port
)
2200 unsigned long flags
;
2202 spin_lock_irqsave(&port
->slock
, flags
);
2205 outb(port
->x_char
, port
->ioaddr
+ UART_TX
);
2207 mxvar_log
.txcnt
[port
->tty
->index
]++;
2208 port
->mon_data
.txcnt
++;
2209 port
->mon_data
.up_txcnt
++;
2214 if (port
->xmit_buf
== 0)
2217 if ((port
->xmit_cnt
<= 0) || port
->tty
->stopped
||
2218 (port
->tty
->hw_stopped
&&
2219 (port
->type
!= PORT_16550A
) &&
2220 (!port
->board
->chip_flag
))) {
2221 port
->IER
&= ~UART_IER_THRI
;
2222 outb(port
->IER
, port
->ioaddr
+ UART_IER
);
2226 cnt
= port
->xmit_cnt
;
2227 count
= port
->xmit_fifo_size
;
2229 outb(port
->xmit_buf
[port
->xmit_tail
++],
2230 port
->ioaddr
+ UART_TX
);
2231 port
->xmit_tail
= port
->xmit_tail
& (SERIAL_XMIT_SIZE
- 1);
2232 if (--port
->xmit_cnt
<= 0)
2234 } while (--count
> 0);
2235 mxvar_log
.txcnt
[port
->tty
->index
] += (cnt
- port
->xmit_cnt
);
2237 port
->mon_data
.txcnt
+= (cnt
- port
->xmit_cnt
);
2238 port
->mon_data
.up_txcnt
+= (cnt
- port
->xmit_cnt
);
2239 port
->icount
.tx
+= (cnt
- port
->xmit_cnt
);
2241 if (port
->xmit_cnt
< WAKEUP_CHARS
) {
2242 set_bit(MXSER_EVENT_TXLOW
, &port
->event
);
2243 schedule_work(&port
->tqueue
);
2245 if (port
->xmit_cnt
<= 0) {
2246 port
->IER
&= ~UART_IER_THRI
;
2247 outb(port
->IER
, port
->ioaddr
+ UART_IER
);
2250 spin_unlock_irqrestore(&port
->slock
, flags
);
2254 * This is the serial driver's generic interrupt routine
2256 static irqreturn_t
mxser_interrupt(int irq
, void *dev_id
)
2259 struct mxser_board
*brd
= NULL
;
2260 struct mxser_port
*port
;
2261 int max
, irqbits
, bits
, msr
;
2262 int pass_counter
= 0;
2263 unsigned int int_cnt
;
2264 int handled
= IRQ_NONE
;
2266 for (i
= 0; i
< MXSER_BOARDS
; i
++)
2267 if (dev_id
== &mxser_boards
[i
]) {
2272 if (i
== MXSER_BOARDS
)
2276 max
= brd
->info
->nports
;
2278 irqbits
= inb(brd
->vector
) & brd
->vector_mask
;
2279 if (irqbits
== brd
->vector_mask
)
2282 handled
= IRQ_HANDLED
;
2283 for (i
= 0, bits
= 1; i
< max
; i
++, irqbits
|= bits
, bits
<<= 1) {
2284 if (irqbits
== brd
->vector_mask
)
2288 port
= &brd
->ports
[i
];
2292 iir
= inb(port
->ioaddr
+ UART_IIR
);
2293 if (iir
& UART_IIR_NO_INT
)
2295 iir
&= MOXA_MUST_IIR_MASK
;
2297 status
= inb(port
->ioaddr
+ UART_LSR
);
2298 outb(0x27, port
->ioaddr
+ UART_FCR
);
2299 inb(port
->ioaddr
+ UART_MSR
);
2303 status
= inb(port
->ioaddr
+ UART_LSR
);
2305 if (status
& UART_LSR_PE
)
2306 port
->err_shadow
|= NPPI_NOTIFY_PARITY
;
2307 if (status
& UART_LSR_FE
)
2308 port
->err_shadow
|= NPPI_NOTIFY_FRAMING
;
2309 if (status
& UART_LSR_OE
)
2311 NPPI_NOTIFY_HW_OVERRUN
;
2312 if (status
& UART_LSR_BI
)
2313 port
->err_shadow
|= NPPI_NOTIFY_BREAK
;
2315 if (port
->board
->chip_flag
) {
2316 if (iir
== MOXA_MUST_IIR_GDA
||
2317 iir
== MOXA_MUST_IIR_RDA
||
2318 iir
== MOXA_MUST_IIR_RTO
||
2319 iir
== MOXA_MUST_IIR_LSR
)
2320 mxser_receive_chars(port
,
2324 status
&= port
->read_status_mask
;
2325 if (status
& UART_LSR_DR
)
2326 mxser_receive_chars(port
,
2329 msr
= inb(port
->ioaddr
+ UART_MSR
);
2330 if (msr
& UART_MSR_ANY_DELTA
)
2331 mxser_check_modem_status(port
, msr
);
2333 if (port
->board
->chip_flag
) {
2334 if (iir
== 0x02 && (status
&
2336 mxser_transmit_chars(port
);
2338 if (status
& UART_LSR_THRE
)
2339 mxser_transmit_chars(port
);
2341 } while (int_cnt
++ < MXSER_ISR_PASS_LIMIT
);
2343 if (pass_counter
++ > MXSER_ISR_PASS_LIMIT
)
2344 break; /* Prevent infinite loops */
2351 static const struct tty_operations mxser_ops
= {
2353 .close
= mxser_close
,
2354 .write
= mxser_write
,
2355 .put_char
= mxser_put_char
,
2356 .flush_chars
= mxser_flush_chars
,
2357 .write_room
= mxser_write_room
,
2358 .chars_in_buffer
= mxser_chars_in_buffer
,
2359 .flush_buffer
= mxser_flush_buffer
,
2360 .ioctl
= mxser_ioctl
,
2361 .throttle
= mxser_throttle
,
2362 .unthrottle
= mxser_unthrottle
,
2363 .set_termios
= mxser_set_termios
,
2365 .start
= mxser_start
,
2366 .hangup
= mxser_hangup
,
2367 .break_ctl
= mxser_rs_break
,
2368 .wait_until_sent
= mxser_wait_until_sent
,
2369 .tiocmget
= mxser_tiocmget
,
2370 .tiocmset
= mxser_tiocmset
,
2374 * The MOXA Smartio/Industio serial driver boot-time initialization code!
2377 static void mxser_release_res(struct mxser_board
*brd
, struct pci_dev
*pdev
,
2381 free_irq(brd
->irq
, brd
);
2382 if (pdev
!= NULL
) { /* PCI */
2383 pci_release_region(pdev
, 2);
2384 pci_release_region(pdev
, 3);
2387 release_region(brd
->ports
[0].ioaddr
, 8 * brd
->info
->nports
);
2388 release_region(brd
->vector
, 1);
2392 static int __devinit
mxser_initbrd(struct mxser_board
*brd
,
2393 struct pci_dev
*pdev
)
2395 struct mxser_port
*info
;
2399 printk(KERN_INFO
"max. baud rate = %d bps.\n", brd
->ports
[0].max_baud
);
2401 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2402 info
= &brd
->ports
[i
];
2405 info
->ldisc_stop_rx
= 0;
2407 /* Enhance mode enabled here */
2408 if (brd
->chip_flag
!= MOXA_OTHER_UART
)
2409 ENABLE_MOXA_MUST_ENCHANCE_MODE(info
->ioaddr
);
2411 info
->flags
= ASYNC_SHARE_IRQ
;
2412 info
->type
= brd
->uart_type
;
2414 process_txrx_fifo(info
);
2416 info
->custom_divisor
= info
->baud_base
* 16;
2417 info
->close_delay
= 5 * HZ
/ 10;
2418 info
->closing_wait
= 30 * HZ
;
2419 INIT_WORK(&info
->tqueue
, mxser_do_softint
);
2420 info
->normal_termios
= mxvar_sdriver
->init_termios
;
2421 init_waitqueue_head(&info
->open_wait
);
2422 init_waitqueue_head(&info
->close_wait
);
2423 init_waitqueue_head(&info
->delta_msr_wait
);
2424 memset(&info
->mon_data
, 0, sizeof(struct mxser_mon
));
2425 info
->err_shadow
= 0;
2426 spin_lock_init(&info
->slock
);
2428 /* before set INT ISR, disable all int */
2429 outb(inb(info
->ioaddr
+ UART_IER
) & 0xf0,
2430 info
->ioaddr
+ UART_IER
);
2433 * Allocate the IRQ if necessary
2436 retval
= request_irq(brd
->irq
, mxser_interrupt
,
2437 (brd
->ports
[0].flags
& ASYNC_SHARE_IRQ
) ? IRQF_SHARED
:
2438 IRQF_DISABLED
, "mxser", brd
);
2440 printk(KERN_ERR
"Board %s: Request irq failed, IRQ (%d) may "
2441 "conflict with another device.\n",
2442 brd
->info
->name
, brd
->irq
);
2443 /* We hold resources, we need to release them. */
2444 mxser_release_res(brd
, pdev
, 0);
2450 static int __init
mxser_get_ISA_conf(int cap
, struct mxser_board
*brd
)
2453 unsigned short regs
[16], irq
;
2454 unsigned char scratch
, scratch2
;
2456 brd
->chip_flag
= MOXA_OTHER_UART
;
2458 id
= mxser_read_register(cap
, regs
);
2461 brd
->info
= &mxser_cards
[0];
2464 brd
->info
= &mxser_cards
[1];
2466 case CI104J_ASIC_ID
:
2467 brd
->info
= &mxser_cards
[2];
2470 brd
->info
= &mxser_cards
[5];
2473 brd
->info
= &mxser_cards
[6];
2476 brd
->info
= &mxser_cards
[7];
2483 /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2484 Flag-hack checks if configuration should be read as 2-port here. */
2485 if (brd
->info
->nports
== 2 || (brd
->info
->flags
& MXSER_HAS2
)) {
2486 irq
= regs
[9] & 0xF000;
2487 irq
= irq
| (irq
>> 4);
2488 if (irq
!= (regs
[9] & 0xFF00))
2489 return MXSER_ERR_IRQ_CONFLIT
;
2490 } else if (brd
->info
->nports
== 4) {
2491 irq
= regs
[9] & 0xF000;
2492 irq
= irq
| (irq
>> 4);
2493 irq
= irq
| (irq
>> 8);
2495 return MXSER_ERR_IRQ_CONFLIT
;
2496 } else if (brd
->info
->nports
== 8) {
2497 irq
= regs
[9] & 0xF000;
2498 irq
= irq
| (irq
>> 4);
2499 irq
= irq
| (irq
>> 8);
2500 if ((irq
!= regs
[9]) || (irq
!= regs
[10]))
2501 return MXSER_ERR_IRQ_CONFLIT
;
2505 return MXSER_ERR_IRQ
;
2506 brd
->irq
= ((int)(irq
& 0xF000) >> 12);
2507 for (i
= 0; i
< 8; i
++)
2508 brd
->ports
[i
].ioaddr
= (int) regs
[i
+ 1] & 0xFFF8;
2509 if ((regs
[12] & 0x80) == 0)
2510 return MXSER_ERR_VECTOR
;
2511 brd
->vector
= (int)regs
[11]; /* interrupt vector */
2513 brd
->vector_mask
= 0x00FF;
2515 brd
->vector_mask
= 0x000F;
2516 for (i
= 7, bits
= 0x0100; i
>= 0; i
--, bits
<<= 1) {
2517 if (regs
[12] & bits
) {
2518 brd
->ports
[i
].baud_base
= 921600;
2519 brd
->ports
[i
].max_baud
= 921600;
2521 brd
->ports
[i
].baud_base
= 115200;
2522 brd
->ports
[i
].max_baud
= 115200;
2525 scratch2
= inb(cap
+ UART_LCR
) & (~UART_LCR_DLAB
);
2526 outb(scratch2
| UART_LCR_DLAB
, cap
+ UART_LCR
);
2527 outb(0, cap
+ UART_EFR
); /* EFR is the same as FCR */
2528 outb(scratch2
, cap
+ UART_LCR
);
2529 outb(UART_FCR_ENABLE_FIFO
, cap
+ UART_FCR
);
2530 scratch
= inb(cap
+ UART_IIR
);
2533 brd
->uart_type
= PORT_16550A
;
2535 brd
->uart_type
= PORT_16450
;
2536 if (!request_region(brd
->ports
[0].ioaddr
, 8 * brd
->info
->nports
,
2538 return MXSER_ERR_IOADDR
;
2539 if (!request_region(brd
->vector
, 1, "mxser(vector)")) {
2540 release_region(brd
->ports
[0].ioaddr
, 8 * brd
->info
->nports
);
2541 return MXSER_ERR_VECTOR
;
2543 return brd
->info
->nports
;
2546 static int __devinit
mxser_probe(struct pci_dev
*pdev
,
2547 const struct pci_device_id
*ent
)
2549 struct mxser_board
*brd
;
2551 unsigned long ioaddress
;
2552 int retval
= -EINVAL
;
2554 for (i
= 0; i
< MXSER_BOARDS
; i
++)
2555 if (mxser_boards
[i
].info
== NULL
)
2558 if (i
>= MXSER_BOARDS
) {
2559 printk(KERN_ERR
"Too many Smartio/Industio family boards found "
2560 "(maximum %d), board not configured\n", MXSER_BOARDS
);
2564 brd
= &mxser_boards
[i
];
2565 brd
->idx
= i
* MXSER_PORTS_PER_BOARD
;
2566 printk(KERN_INFO
"Found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2567 mxser_cards
[ent
->driver_data
].name
,
2568 pdev
->bus
->number
, PCI_SLOT(pdev
->devfn
));
2570 retval
= pci_enable_device(pdev
);
2572 printk(KERN_ERR
"Moxa SmartI/O PCI enable fail !\n");
2577 ioaddress
= pci_resource_start(pdev
, 2);
2578 retval
= pci_request_region(pdev
, 2, "mxser(IO)");
2582 brd
->info
= &mxser_cards
[ent
->driver_data
];
2583 for (i
= 0; i
< brd
->info
->nports
; i
++)
2584 brd
->ports
[i
].ioaddr
= ioaddress
+ 8 * i
;
2587 ioaddress
= pci_resource_start(pdev
, 3);
2588 retval
= pci_request_region(pdev
, 3, "mxser(vector)");
2591 brd
->vector
= ioaddress
;
2594 brd
->irq
= pdev
->irq
;
2596 brd
->chip_flag
= CheckIsMoxaMust(brd
->ports
[0].ioaddr
);
2597 brd
->uart_type
= PORT_16550A
;
2598 brd
->vector_mask
= 0;
2600 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2601 for (j
= 0; j
< UART_INFO_NUM
; j
++) {
2602 if (Gpci_uart_info
[j
].type
== brd
->chip_flag
) {
2603 brd
->ports
[i
].max_baud
=
2604 Gpci_uart_info
[j
].max_baud
;
2606 /* exception....CP-102 */
2607 if (brd
->info
->flags
& MXSER_HIGHBAUD
)
2608 brd
->ports
[i
].max_baud
= 921600;
2614 if (brd
->chip_flag
== MOXA_MUST_MU860_HWID
) {
2615 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2617 brd
->ports
[i
].opmode_ioaddr
= ioaddress
+ 4;
2619 brd
->ports
[i
].opmode_ioaddr
= ioaddress
+ 0x0c;
2621 outb(0, ioaddress
+ 4); /* default set to RS232 mode */
2622 outb(0, ioaddress
+ 0x0c); /* default set to RS232 mode */
2625 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2626 brd
->vector_mask
|= (1 << i
);
2627 brd
->ports
[i
].baud_base
= 921600;
2630 /* mxser_initbrd will hook ISR. */
2631 if (mxser_initbrd(brd
, pdev
) < 0)
2634 for (i
= 0; i
< brd
->info
->nports
; i
++)
2635 tty_register_device(mxvar_sdriver
, brd
->idx
+ i
, &pdev
->dev
);
2637 pci_set_drvdata(pdev
, brd
);
2641 pci_release_region(pdev
, 3);
2643 pci_release_region(pdev
, 2);
2649 static void __devexit
mxser_remove(struct pci_dev
*pdev
)
2651 struct mxser_board
*brd
= pci_get_drvdata(pdev
);
2654 for (i
= 0; i
< brd
->info
->nports
; i
++)
2655 tty_unregister_device(mxvar_sdriver
, brd
->idx
+ i
);
2657 mxser_release_res(brd
, pdev
, 1);
2660 static struct pci_driver mxser_driver
= {
2662 .id_table
= mxser_pcibrds
,
2663 .probe
= mxser_probe
,
2664 .remove
= __devexit_p(mxser_remove
)
2667 static int __init
mxser_module_init(void)
2669 struct mxser_board
*brd
;
2671 unsigned int i
, m
, isaloop
;
2674 pr_debug("Loading module mxser ...\n");
2676 mxvar_sdriver
= alloc_tty_driver(MXSER_PORTS
+ 1);
2679 spin_lock_init(&gm_lock
);
2681 printk(KERN_INFO
"MOXA Smartio/Industio family driver version %s\n",
2684 /* Initialize the tty_driver structure */
2685 mxvar_sdriver
->magic
= TTY_DRIVER_MAGIC
;
2686 mxvar_sdriver
->name
= "ttyMI";
2687 mxvar_sdriver
->major
= ttymajor
;
2688 mxvar_sdriver
->minor_start
= 0;
2689 mxvar_sdriver
->num
= MXSER_PORTS
+ 1;
2690 mxvar_sdriver
->type
= TTY_DRIVER_TYPE_SERIAL
;
2691 mxvar_sdriver
->subtype
= SERIAL_TYPE_NORMAL
;
2692 mxvar_sdriver
->init_termios
= tty_std_termios
;
2693 mxvar_sdriver
->init_termios
.c_cflag
= B9600
|CS8
|CREAD
|HUPCL
|CLOCAL
;
2694 mxvar_sdriver
->flags
= TTY_DRIVER_REAL_RAW
|TTY_DRIVER_DYNAMIC_DEV
;
2695 tty_set_operations(mxvar_sdriver
, &mxser_ops
);
2697 retval
= tty_register_driver(mxvar_sdriver
);
2699 printk(KERN_ERR
"Couldn't install MOXA Smartio/Industio family "
2707 /* Start finding ISA boards here */
2708 for (isaloop
= 0; isaloop
< 2; isaloop
++)
2709 for (b
= 0; b
< MXSER_BOARDS
&& m
< MXSER_BOARDS
; b
++) {
2711 cap
= mxserBoardCAP
[b
]; /* predefined */
2713 cap
= ioaddr
[b
]; /* module param */
2718 brd
= &mxser_boards
[m
];
2719 retval
= mxser_get_ISA_conf(cap
, brd
);
2722 printk(KERN_INFO
"Found MOXA %s board "
2724 brd
->info
->name
, ioaddr
[b
]);
2727 if (retval
== MXSER_ERR_IRQ
)
2728 printk(KERN_ERR
"Invalid interrupt "
2729 "number, board not "
2731 else if (retval
== MXSER_ERR_IRQ_CONFLIT
)
2732 printk(KERN_ERR
"Invalid interrupt "
2733 "number, board not "
2735 else if (retval
== MXSER_ERR_VECTOR
)
2736 printk(KERN_ERR
"Invalid interrupt "
2737 "vector, board not "
2739 else if (retval
== MXSER_ERR_IOADDR
)
2740 printk(KERN_ERR
"Invalid I/O address, "
2741 "board not configured\n");
2747 /* mxser_initbrd will hook ISR. */
2748 if (mxser_initbrd(brd
, NULL
) < 0) {
2753 brd
->idx
= m
* MXSER_PORTS_PER_BOARD
;
2754 for (i
= 0; i
< brd
->info
->nports
; i
++)
2755 tty_register_device(mxvar_sdriver
, brd
->idx
+ i
,
2761 retval
= pci_register_driver(&mxser_driver
);
2763 printk(KERN_ERR
"Can't register pci driver\n");
2767 } /* else: we have some ISA cards under control */
2770 pr_debug("Done.\n");
2774 tty_unregister_driver(mxvar_sdriver
);
2776 put_tty_driver(mxvar_sdriver
);
2780 static void __exit
mxser_module_exit(void)
2784 pr_debug("Unloading module mxser ...\n");
2786 pci_unregister_driver(&mxser_driver
);
2788 for (i
= 0; i
< MXSER_BOARDS
; i
++) /* ISA remains */
2789 if (mxser_boards
[i
].info
!= NULL
)
2790 for (j
= 0; j
< mxser_boards
[i
].info
->nports
; j
++)
2791 tty_unregister_device(mxvar_sdriver
,
2792 mxser_boards
[i
].idx
+ j
);
2793 tty_unregister_driver(mxvar_sdriver
);
2794 put_tty_driver(mxvar_sdriver
);
2796 for (i
= 0; i
< MXSER_BOARDS
; i
++)
2797 if (mxser_boards
[i
].info
!= NULL
)
2798 mxser_release_res(&mxser_boards
[i
], NULL
, 1);
2800 pr_debug("Done.\n");
2803 module_init(mxser_module_init
);
2804 module_exit(mxser_module_exit
);