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 */
241 int x_char
; /* xon/xoff character */
242 int IER
; /* Interrupt Enable Register */
243 int MCR
; /* Modem control register */
245 unsigned char stop_rx
;
246 unsigned char ldisc_stop_rx
;
250 unsigned short closing_wait
;
251 unsigned char err_shadow
;
254 int count
; /* # of fd on device */
255 int blocked_open
; /* # of blocked opens */
256 struct async_icount icount
; /* kernel counters for 4 input interrupts */
259 int read_status_mask
;
260 int ignore_status_mask
;
262 unsigned char *xmit_buf
;
267 struct ktermios normal_termios
;
269 struct mxser_mon mon_data
;
272 wait_queue_head_t open_wait
;
273 wait_queue_head_t delta_msr_wait
;
279 const struct mxser_cardinfo
*info
;
280 unsigned long vector
;
281 unsigned long vector_mask
;
286 struct mxser_port ports
[MXSER_PORTS_PER_BOARD
];
289 struct mxser_mstatus
{
297 static struct mxser_mstatus GMStatus
[MXSER_PORTS
];
299 static int mxserBoardCAP
[MXSER_BOARDS
] = {
301 /* 0x180, 0x280, 0x200, 0x320 */
304 static struct mxser_board mxser_boards
[MXSER_BOARDS
];
305 static struct tty_driver
*mxvar_sdriver
;
306 static struct mxser_log mxvar_log
;
307 static int mxvar_diagflag
;
308 static unsigned char mxser_msr
[MXSER_PORTS
+ 1];
309 static struct mxser_mon_ext mon_data_ext
;
310 static int mxser_set_baud_method
[MXSER_PORTS
+ 1];
313 static int __devinit
CheckIsMoxaMust(int io
)
318 outb(0, io
+ UART_LCR
);
319 DISABLE_MOXA_MUST_ENCHANCE_MODE(io
);
320 oldmcr
= inb(io
+ UART_MCR
);
321 outb(0, io
+ UART_MCR
);
322 SET_MOXA_MUST_XON1_VALUE(io
, 0x11);
323 if ((hwid
= inb(io
+ UART_MCR
)) != 0) {
324 outb(oldmcr
, io
+ UART_MCR
);
325 return MOXA_OTHER_UART
;
328 GET_MOXA_MUST_HARDWARE_ID(io
, &hwid
);
329 for (i
= 1; i
< UART_INFO_NUM
; i
++) { /* 0 = OTHER_UART */
330 if (hwid
== Gpci_uart_info
[i
].type
)
333 return MOXA_OTHER_UART
;
337 static void process_txrx_fifo(struct mxser_port
*info
)
341 if ((info
->type
== PORT_16450
) || (info
->type
== PORT_8250
)) {
342 info
->rx_trigger
= 1;
343 info
->rx_high_water
= 1;
344 info
->rx_low_water
= 1;
345 info
->xmit_fifo_size
= 1;
347 for (i
= 0; i
< UART_INFO_NUM
; i
++)
348 if (info
->board
->chip_flag
== Gpci_uart_info
[i
].type
) {
349 info
->rx_trigger
= Gpci_uart_info
[i
].rx_trigger
;
350 info
->rx_low_water
= Gpci_uart_info
[i
].rx_low_water
;
351 info
->rx_high_water
= Gpci_uart_info
[i
].rx_high_water
;
352 info
->xmit_fifo_size
= Gpci_uart_info
[i
].xmit_fifo_size
;
357 static unsigned char mxser_get_msr(int baseaddr
, int mode
, int port
)
359 unsigned char status
= 0;
361 status
= inb(baseaddr
+ UART_MSR
);
363 mxser_msr
[port
] &= 0x0F;
364 mxser_msr
[port
] |= status
;
365 status
= mxser_msr
[port
];
372 static int mxser_block_til_ready(struct tty_struct
*tty
, struct file
*filp
,
373 struct mxser_port
*port
)
375 DECLARE_WAITQUEUE(wait
, current
);
381 * If non-blocking mode is set, or the port is not enabled,
382 * then make the check up front and then exit.
384 if ((filp
->f_flags
& O_NONBLOCK
) ||
385 test_bit(TTY_IO_ERROR
, &tty
->flags
)) {
386 port
->flags
|= ASYNC_NORMAL_ACTIVE
;
390 if (tty
->termios
->c_cflag
& CLOCAL
)
394 * Block waiting for the carrier detect and the line to become
395 * free (i.e., not in use by the callout). While we are in
396 * this loop, port->count is dropped by one, so that
397 * mxser_close() knows when to free things. We restore it upon
398 * exit, either normal or abnormal.
401 add_wait_queue(&port
->open_wait
, &wait
);
403 spin_lock_irqsave(&port
->slock
, flags
);
404 if (!tty_hung_up_p(filp
))
406 spin_unlock_irqrestore(&port
->slock
, flags
);
407 port
->blocked_open
++;
409 spin_lock_irqsave(&port
->slock
, flags
);
410 outb(inb(port
->ioaddr
+ UART_MCR
) |
411 UART_MCR_DTR
| UART_MCR_RTS
, port
->ioaddr
+ UART_MCR
);
412 spin_unlock_irqrestore(&port
->slock
, flags
);
413 set_current_state(TASK_INTERRUPTIBLE
);
414 if (tty_hung_up_p(filp
) || !(port
->flags
& ASYNC_INITIALIZED
)) {
415 if (port
->flags
& ASYNC_HUP_NOTIFY
)
418 retval
= -ERESTARTSYS
;
421 if (!(port
->flags
& ASYNC_CLOSING
) &&
423 (inb(port
->ioaddr
+ UART_MSR
) & UART_MSR_DCD
)))
425 if (signal_pending(current
)) {
426 retval
= -ERESTARTSYS
;
431 set_current_state(TASK_RUNNING
);
432 remove_wait_queue(&port
->open_wait
, &wait
);
433 if (!tty_hung_up_p(filp
))
435 port
->blocked_open
--;
438 port
->flags
|= ASYNC_NORMAL_ACTIVE
;
442 static int mxser_set_baud(struct mxser_port
*info
, long newspd
)
449 if (!info
->tty
|| !info
->tty
->termios
)
455 if (newspd
> info
->max_baud
)
458 info
->realbaud
= newspd
;
460 quot
= (2 * info
->baud_base
/ 269);
462 quot
= info
->baud_base
/ newspd
;
469 info
->timeout
= ((info
->xmit_fifo_size
* HZ
* 10 * quot
) / info
->baud_base
);
470 info
->timeout
+= HZ
/ 50; /* Add .02 seconds of slop */
473 spin_lock_irqsave(&info
->slock
, flags
);
474 info
->MCR
|= UART_MCR_DTR
;
475 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
476 spin_unlock_irqrestore(&info
->slock
, flags
);
478 spin_lock_irqsave(&info
->slock
, flags
);
479 info
->MCR
&= ~UART_MCR_DTR
;
480 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
481 spin_unlock_irqrestore(&info
->slock
, flags
);
485 cval
= inb(info
->ioaddr
+ UART_LCR
);
487 outb(cval
| UART_LCR_DLAB
, info
->ioaddr
+ UART_LCR
); /* set DLAB */
489 outb(quot
& 0xff, info
->ioaddr
+ UART_DLL
); /* LS of divisor */
490 outb(quot
>> 8, info
->ioaddr
+ UART_DLM
); /* MS of divisor */
491 outb(cval
, info
->ioaddr
+ UART_LCR
); /* reset DLAB */
498 * This routine is called to set the UART divisor registers to match
499 * the specified baud rate for a serial port.
501 static int mxser_change_speed(struct mxser_port
*info
,
502 struct ktermios
*old_termios
)
504 unsigned cflag
, cval
, fcr
;
506 unsigned char status
;
510 if (!info
->tty
|| !info
->tty
->termios
)
512 cflag
= info
->tty
->termios
->c_cflag
;
516 if (mxser_set_baud_method
[info
->tty
->index
] == 0) {
517 baud
= tty_get_baud_rate(info
->tty
);
518 mxser_set_baud(info
, baud
);
521 /* byte size and parity */
522 switch (cflag
& CSIZE
) {
537 break; /* too keep GCC shut... */
542 cval
|= UART_LCR_PARITY
;
543 if (!(cflag
& PARODD
))
544 cval
|= UART_LCR_EPAR
;
546 cval
|= UART_LCR_SPAR
;
548 if ((info
->type
== PORT_8250
) || (info
->type
== PORT_16450
)) {
549 if (info
->board
->chip_flag
) {
550 fcr
= UART_FCR_ENABLE_FIFO
;
551 fcr
|= MOXA_MUST_FCR_GDA_MODE_ENABLE
;
552 SET_MOXA_MUST_FIFO_VALUE(info
);
556 fcr
= UART_FCR_ENABLE_FIFO
;
557 if (info
->board
->chip_flag
) {
558 fcr
|= MOXA_MUST_FCR_GDA_MODE_ENABLE
;
559 SET_MOXA_MUST_FIFO_VALUE(info
);
561 switch (info
->rx_trigger
) {
563 fcr
|= UART_FCR_TRIGGER_1
;
566 fcr
|= UART_FCR_TRIGGER_4
;
569 fcr
|= UART_FCR_TRIGGER_8
;
572 fcr
|= UART_FCR_TRIGGER_14
;
578 /* CTS flow control flag and modem status interrupts */
579 info
->IER
&= ~UART_IER_MSI
;
580 info
->MCR
&= ~UART_MCR_AFE
;
581 if (cflag
& CRTSCTS
) {
582 info
->flags
|= ASYNC_CTS_FLOW
;
583 info
->IER
|= UART_IER_MSI
;
584 if ((info
->type
== PORT_16550A
) || (info
->board
->chip_flag
)) {
585 info
->MCR
|= UART_MCR_AFE
;
587 status
= inb(info
->ioaddr
+ UART_MSR
);
588 if (info
->tty
->hw_stopped
) {
589 if (status
& UART_MSR_CTS
) {
590 info
->tty
->hw_stopped
= 0;
591 if (info
->type
!= PORT_16550A
&&
592 !info
->board
->chip_flag
) {
593 outb(info
->IER
& ~UART_IER_THRI
,
596 info
->IER
|= UART_IER_THRI
;
597 outb(info
->IER
, info
->ioaddr
+
600 tty_wakeup(info
->tty
);
603 if (!(status
& UART_MSR_CTS
)) {
604 info
->tty
->hw_stopped
= 1;
605 if ((info
->type
!= PORT_16550A
) &&
606 (!info
->board
->chip_flag
)) {
607 info
->IER
&= ~UART_IER_THRI
;
608 outb(info
->IER
, info
->ioaddr
+
615 info
->flags
&= ~ASYNC_CTS_FLOW
;
617 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
618 if (cflag
& CLOCAL
) {
619 info
->flags
&= ~ASYNC_CHECK_CD
;
621 info
->flags
|= ASYNC_CHECK_CD
;
622 info
->IER
|= UART_IER_MSI
;
624 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
627 * Set up parity check flag
629 info
->read_status_mask
= UART_LSR_OE
| UART_LSR_THRE
| UART_LSR_DR
;
630 if (I_INPCK(info
->tty
))
631 info
->read_status_mask
|= UART_LSR_FE
| UART_LSR_PE
;
632 if (I_BRKINT(info
->tty
) || I_PARMRK(info
->tty
))
633 info
->read_status_mask
|= UART_LSR_BI
;
635 info
->ignore_status_mask
= 0;
637 if (I_IGNBRK(info
->tty
)) {
638 info
->ignore_status_mask
|= UART_LSR_BI
;
639 info
->read_status_mask
|= UART_LSR_BI
;
641 * If we're ignore parity and break indicators, ignore
642 * overruns too. (For real raw support).
644 if (I_IGNPAR(info
->tty
)) {
645 info
->ignore_status_mask
|=
649 info
->read_status_mask
|=
655 if (info
->board
->chip_flag
) {
656 spin_lock_irqsave(&info
->slock
, flags
);
657 SET_MOXA_MUST_XON1_VALUE(info
->ioaddr
, START_CHAR(info
->tty
));
658 SET_MOXA_MUST_XOFF1_VALUE(info
->ioaddr
, STOP_CHAR(info
->tty
));
659 if (I_IXON(info
->tty
)) {
660 ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info
->ioaddr
);
662 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info
->ioaddr
);
664 if (I_IXOFF(info
->tty
)) {
665 ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info
->ioaddr
);
667 DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info
->ioaddr
);
669 spin_unlock_irqrestore(&info
->slock
, flags
);
673 outb(fcr
, info
->ioaddr
+ UART_FCR
); /* set fcr */
674 outb(cval
, info
->ioaddr
+ UART_LCR
);
679 static void mxser_check_modem_status(struct mxser_port
*port
, int status
)
681 /* update input line counters */
682 if (status
& UART_MSR_TERI
)
684 if (status
& UART_MSR_DDSR
)
686 if (status
& UART_MSR_DDCD
)
688 if (status
& UART_MSR_DCTS
)
690 port
->mon_data
.modem_status
= status
;
691 wake_up_interruptible(&port
->delta_msr_wait
);
693 if ((port
->flags
& ASYNC_CHECK_CD
) && (status
& UART_MSR_DDCD
)) {
694 if (status
& UART_MSR_DCD
)
695 wake_up_interruptible(&port
->open_wait
);
698 if (port
->flags
& ASYNC_CTS_FLOW
) {
699 if (port
->tty
->hw_stopped
) {
700 if (status
& UART_MSR_CTS
) {
701 port
->tty
->hw_stopped
= 0;
703 if ((port
->type
!= PORT_16550A
) &&
704 (!port
->board
->chip_flag
)) {
705 outb(port
->IER
& ~UART_IER_THRI
,
706 port
->ioaddr
+ UART_IER
);
707 port
->IER
|= UART_IER_THRI
;
708 outb(port
->IER
, port
->ioaddr
+
711 tty_wakeup(port
->tty
);
714 if (!(status
& UART_MSR_CTS
)) {
715 port
->tty
->hw_stopped
= 1;
716 if (port
->type
!= PORT_16550A
&&
717 !port
->board
->chip_flag
) {
718 port
->IER
&= ~UART_IER_THRI
;
719 outb(port
->IER
, port
->ioaddr
+
727 static int mxser_startup(struct mxser_port
*info
)
732 page
= __get_free_page(GFP_KERNEL
);
736 spin_lock_irqsave(&info
->slock
, flags
);
738 if (info
->flags
& ASYNC_INITIALIZED
) {
740 spin_unlock_irqrestore(&info
->slock
, flags
);
744 if (!info
->ioaddr
|| !info
->type
) {
746 set_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
748 spin_unlock_irqrestore(&info
->slock
, flags
);
754 info
->xmit_buf
= (unsigned char *) page
;
757 * Clear the FIFO buffers and disable them
758 * (they will be reenabled in mxser_change_speed())
760 if (info
->board
->chip_flag
)
761 outb((UART_FCR_CLEAR_RCVR
|
762 UART_FCR_CLEAR_XMIT
|
763 MOXA_MUST_FCR_GDA_MODE_ENABLE
), info
->ioaddr
+ UART_FCR
);
765 outb((UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
),
766 info
->ioaddr
+ UART_FCR
);
769 * At this point there's no way the LSR could still be 0xFF;
770 * if it is, then bail out, because there's likely no UART
773 if (inb(info
->ioaddr
+ UART_LSR
) == 0xff) {
774 spin_unlock_irqrestore(&info
->slock
, flags
);
775 if (capable(CAP_SYS_ADMIN
)) {
777 set_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
784 * Clear the interrupt registers.
786 (void) inb(info
->ioaddr
+ UART_LSR
);
787 (void) inb(info
->ioaddr
+ UART_RX
);
788 (void) inb(info
->ioaddr
+ UART_IIR
);
789 (void) inb(info
->ioaddr
+ UART_MSR
);
792 * Now, initialize the UART
794 outb(UART_LCR_WLEN8
, info
->ioaddr
+ UART_LCR
); /* reset DLAB */
795 info
->MCR
= UART_MCR_DTR
| UART_MCR_RTS
;
796 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
799 * Finally, enable interrupts
801 info
->IER
= UART_IER_MSI
| UART_IER_RLSI
| UART_IER_RDI
;
803 if (info
->board
->chip_flag
)
804 info
->IER
|= MOXA_MUST_IER_EGDAI
;
805 outb(info
->IER
, info
->ioaddr
+ UART_IER
); /* enable interrupts */
808 * And clear the interrupt registers again for luck.
810 (void) inb(info
->ioaddr
+ UART_LSR
);
811 (void) inb(info
->ioaddr
+ UART_RX
);
812 (void) inb(info
->ioaddr
+ UART_IIR
);
813 (void) inb(info
->ioaddr
+ UART_MSR
);
816 clear_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
817 info
->xmit_cnt
= info
->xmit_head
= info
->xmit_tail
= 0;
820 * and set the speed of the serial port
822 spin_unlock_irqrestore(&info
->slock
, flags
);
823 mxser_change_speed(info
, NULL
);
825 info
->flags
|= ASYNC_INITIALIZED
;
830 * This routine will shutdown a serial port; interrupts maybe disabled, and
831 * DTR is dropped if the hangup on close termio flag is on.
833 static void mxser_shutdown(struct mxser_port
*info
)
837 if (!(info
->flags
& ASYNC_INITIALIZED
))
840 spin_lock_irqsave(&info
->slock
, flags
);
843 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
844 * here so the queue might never be waken up
846 wake_up_interruptible(&info
->delta_msr_wait
);
849 * Free the IRQ, if necessary
851 if (info
->xmit_buf
) {
852 free_page((unsigned long) info
->xmit_buf
);
853 info
->xmit_buf
= NULL
;
857 outb(0x00, info
->ioaddr
+ UART_IER
);
859 if (!info
->tty
|| (info
->tty
->termios
->c_cflag
& HUPCL
))
860 info
->MCR
&= ~(UART_MCR_DTR
| UART_MCR_RTS
);
861 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
863 /* clear Rx/Tx FIFO's */
864 if (info
->board
->chip_flag
)
865 outb(UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
|
866 MOXA_MUST_FCR_GDA_MODE_ENABLE
,
867 info
->ioaddr
+ UART_FCR
);
869 outb(UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
,
870 info
->ioaddr
+ UART_FCR
);
872 /* read data port to reset things */
873 (void) inb(info
->ioaddr
+ UART_RX
);
876 set_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
878 info
->flags
&= ~ASYNC_INITIALIZED
;
880 if (info
->board
->chip_flag
)
881 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info
->ioaddr
);
883 spin_unlock_irqrestore(&info
->slock
, flags
);
887 * This routine is called whenever a serial port is opened. It
888 * enables interrupts for a serial port, linking in its async structure into
889 * the IRQ chain. It also performs the serial-specific
890 * initialization for the tty structure.
892 static int mxser_open(struct tty_struct
*tty
, struct file
*filp
)
894 struct mxser_port
*info
;
897 /* initialize driver_data in case something fails */
898 tty
->driver_data
= NULL
;
901 if (line
== MXSER_PORTS
)
903 if (line
< 0 || line
> MXSER_PORTS
)
905 info
= &mxser_boards
[line
/ MXSER_PORTS_PER_BOARD
].ports
[line
% MXSER_PORTS_PER_BOARD
];
909 tty
->driver_data
= info
;
912 * Start up serial port
915 retval
= mxser_startup(info
);
919 retval
= mxser_block_til_ready(tty
, filp
, info
);
923 /* unmark here for very high baud rate (ex. 921600 bps) used */
924 tty
->low_latency
= 1;
929 * This routine is called when the serial port gets closed. First, we
930 * wait for the last remaining data to be sent. Then, we unlink its
931 * async structure from the interrupt chain if necessary, and we free
932 * that IRQ if nothing is left in the chain.
934 static void mxser_close(struct tty_struct
*tty
, struct file
*filp
)
936 struct mxser_port
*info
= tty
->driver_data
;
938 unsigned long timeout
;
941 if (tty
->index
== MXSER_PORTS
)
946 spin_lock_irqsave(&info
->slock
, flags
);
948 if (tty_hung_up_p(filp
)) {
949 spin_unlock_irqrestore(&info
->slock
, flags
);
952 if ((tty
->count
== 1) && (info
->count
!= 1)) {
954 * Uh, oh. tty->count is 1, which means that the tty
955 * structure will be freed. Info->count should always
956 * be one in these conditions. If it's greater than
957 * one, we've got real problems, since it means the
958 * serial port won't be shutdown.
960 printk(KERN_ERR
"mxser_close: bad serial port count; "
961 "tty->count is 1, info->count is %d\n", info
->count
);
964 if (--info
->count
< 0) {
965 printk(KERN_ERR
"mxser_close: bad serial port count for "
966 "ttys%d: %d\n", tty
->index
, info
->count
);
970 spin_unlock_irqrestore(&info
->slock
, flags
);
973 info
->flags
|= ASYNC_CLOSING
;
974 spin_unlock_irqrestore(&info
->slock
, flags
);
976 * Save the termios structure, since this port may have
977 * separate termios for callout and dialin.
979 if (info
->flags
& ASYNC_NORMAL_ACTIVE
)
980 info
->normal_termios
= *tty
->termios
;
982 * Now we wait for the transmit buffer to clear; and we notify
983 * the line discipline to only process XON/XOFF characters.
986 if (info
->closing_wait
!= ASYNC_CLOSING_WAIT_NONE
)
987 tty_wait_until_sent(tty
, info
->closing_wait
);
989 * At this point we stop accepting input. To do this, we
990 * disable the receive line status interrupts, and tell the
991 * interrupt driver to stop checking the data ready bit in the
992 * line status register.
994 info
->IER
&= ~UART_IER_RLSI
;
995 if (info
->board
->chip_flag
)
996 info
->IER
&= ~MOXA_MUST_RECV_ISR
;
998 if (info
->flags
& ASYNC_INITIALIZED
) {
999 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1001 * Before we drop DTR, make sure the UART transmitter
1002 * has completely drained; this is especially
1003 * important if there is a transmit FIFO!
1005 timeout
= jiffies
+ HZ
;
1006 while (!(inb(info
->ioaddr
+ UART_LSR
) & UART_LSR_TEMT
)) {
1007 schedule_timeout_interruptible(5);
1008 if (time_after(jiffies
, timeout
))
1012 mxser_shutdown(info
);
1014 if (tty
->driver
->flush_buffer
)
1015 tty
->driver
->flush_buffer(tty
);
1017 tty_ldisc_flush(tty
);
1022 if (info
->blocked_open
) {
1023 if (info
->close_delay
)
1024 schedule_timeout_interruptible(info
->close_delay
);
1025 wake_up_interruptible(&info
->open_wait
);
1028 info
->flags
&= ~(ASYNC_NORMAL_ACTIVE
| ASYNC_CLOSING
);
1031 static int mxser_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
1034 struct mxser_port
*info
= tty
->driver_data
;
1035 unsigned long flags
;
1037 if (!info
->xmit_buf
)
1041 c
= min_t(int, count
, min(SERIAL_XMIT_SIZE
- info
->xmit_cnt
- 1,
1042 SERIAL_XMIT_SIZE
- info
->xmit_head
));
1046 memcpy(info
->xmit_buf
+ info
->xmit_head
, buf
, c
);
1047 spin_lock_irqsave(&info
->slock
, flags
);
1048 info
->xmit_head
= (info
->xmit_head
+ c
) &
1049 (SERIAL_XMIT_SIZE
- 1);
1050 info
->xmit_cnt
+= c
;
1051 spin_unlock_irqrestore(&info
->slock
, flags
);
1058 if (info
->xmit_cnt
&& !tty
->stopped
) {
1059 if (!tty
->hw_stopped
||
1060 (info
->type
== PORT_16550A
) ||
1061 (info
->board
->chip_flag
)) {
1062 spin_lock_irqsave(&info
->slock
, flags
);
1063 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+
1065 info
->IER
|= UART_IER_THRI
;
1066 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1067 spin_unlock_irqrestore(&info
->slock
, flags
);
1073 static void mxser_put_char(struct tty_struct
*tty
, unsigned char ch
)
1075 struct mxser_port
*info
= tty
->driver_data
;
1076 unsigned long flags
;
1078 if (!info
->xmit_buf
)
1081 if (info
->xmit_cnt
>= SERIAL_XMIT_SIZE
- 1)
1084 spin_lock_irqsave(&info
->slock
, flags
);
1085 info
->xmit_buf
[info
->xmit_head
++] = ch
;
1086 info
->xmit_head
&= SERIAL_XMIT_SIZE
- 1;
1088 spin_unlock_irqrestore(&info
->slock
, flags
);
1089 if (!tty
->stopped
) {
1090 if (!tty
->hw_stopped
||
1091 (info
->type
== PORT_16550A
) ||
1092 info
->board
->chip_flag
) {
1093 spin_lock_irqsave(&info
->slock
, flags
);
1094 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
1095 info
->IER
|= UART_IER_THRI
;
1096 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1097 spin_unlock_irqrestore(&info
->slock
, flags
);
1103 static void mxser_flush_chars(struct tty_struct
*tty
)
1105 struct mxser_port
*info
= tty
->driver_data
;
1106 unsigned long flags
;
1108 if (info
->xmit_cnt
<= 0 ||
1112 (info
->type
!= PORT_16550A
) &&
1113 (!info
->board
->chip_flag
)
1117 spin_lock_irqsave(&info
->slock
, flags
);
1119 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
1120 info
->IER
|= UART_IER_THRI
;
1121 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1123 spin_unlock_irqrestore(&info
->slock
, flags
);
1126 static int mxser_write_room(struct tty_struct
*tty
)
1128 struct mxser_port
*info
= tty
->driver_data
;
1131 ret
= SERIAL_XMIT_SIZE
- info
->xmit_cnt
- 1;
1137 static int mxser_chars_in_buffer(struct tty_struct
*tty
)
1139 struct mxser_port
*info
= tty
->driver_data
;
1140 return info
->xmit_cnt
;
1143 static void mxser_flush_buffer(struct tty_struct
*tty
)
1145 struct mxser_port
*info
= tty
->driver_data
;
1147 unsigned long flags
;
1150 spin_lock_irqsave(&info
->slock
, flags
);
1151 info
->xmit_cnt
= info
->xmit_head
= info
->xmit_tail
= 0;
1153 fcr
= inb(info
->ioaddr
+ UART_FCR
);
1154 outb((fcr
| UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
),
1155 info
->ioaddr
+ UART_FCR
);
1156 outb(fcr
, info
->ioaddr
+ UART_FCR
);
1158 spin_unlock_irqrestore(&info
->slock
, flags
);
1164 * ------------------------------------------------------------
1165 * friends of mxser_ioctl()
1166 * ------------------------------------------------------------
1168 static int mxser_get_serial_info(struct mxser_port
*info
,
1169 struct serial_struct __user
*retinfo
)
1171 struct serial_struct tmp
;
1175 memset(&tmp
, 0, sizeof(tmp
));
1176 tmp
.type
= info
->type
;
1177 tmp
.line
= info
->tty
->index
;
1178 tmp
.port
= info
->ioaddr
;
1179 tmp
.irq
= info
->board
->irq
;
1180 tmp
.flags
= info
->flags
;
1181 tmp
.baud_base
= info
->baud_base
;
1182 tmp
.close_delay
= info
->close_delay
;
1183 tmp
.closing_wait
= info
->closing_wait
;
1184 tmp
.custom_divisor
= info
->custom_divisor
;
1186 if (copy_to_user(retinfo
, &tmp
, sizeof(*retinfo
)))
1191 static int mxser_set_serial_info(struct mxser_port
*info
,
1192 struct serial_struct __user
*new_info
)
1194 struct serial_struct new_serial
;
1198 if (!new_info
|| !info
->ioaddr
)
1200 if (copy_from_user(&new_serial
, new_info
, sizeof(new_serial
)))
1203 if ((new_serial
.irq
!= info
->board
->irq
) ||
1204 (new_serial
.port
!= info
->ioaddr
) ||
1205 (new_serial
.custom_divisor
!= info
->custom_divisor
) ||
1206 (new_serial
.baud_base
!= info
->baud_base
))
1209 flags
= info
->flags
& ASYNC_SPD_MASK
;
1211 if (!capable(CAP_SYS_ADMIN
)) {
1212 if ((new_serial
.baud_base
!= info
->baud_base
) ||
1213 (new_serial
.close_delay
!= info
->close_delay
) ||
1214 ((new_serial
.flags
& ~ASYNC_USR_MASK
) != (info
->flags
& ~ASYNC_USR_MASK
)))
1216 info
->flags
= ((info
->flags
& ~ASYNC_USR_MASK
) |
1217 (new_serial
.flags
& ASYNC_USR_MASK
));
1220 * OK, past this point, all the error checking has been done.
1221 * At this point, we start making changes.....
1223 info
->flags
= ((info
->flags
& ~ASYNC_FLAGS
) |
1224 (new_serial
.flags
& ASYNC_FLAGS
));
1225 info
->close_delay
= new_serial
.close_delay
* HZ
/ 100;
1226 info
->closing_wait
= new_serial
.closing_wait
* HZ
/ 100;
1227 info
->tty
->low_latency
=
1228 (info
->flags
& ASYNC_LOW_LATENCY
) ? 1 : 0;
1229 info
->tty
->low_latency
= 0;
1232 info
->type
= new_serial
.type
;
1234 process_txrx_fifo(info
);
1236 if (info
->flags
& ASYNC_INITIALIZED
) {
1237 if (flags
!= (info
->flags
& ASYNC_SPD_MASK
))
1238 mxser_change_speed(info
, NULL
);
1240 retval
= mxser_startup(info
);
1246 * mxser_get_lsr_info - get line status register info
1248 * Purpose: Let user call ioctl() to get info when the UART physically
1249 * is emptied. On bus types like RS485, the transmitter must
1250 * release the bus after transmitting. This must be done when
1251 * the transmit shift register is empty, not be done when the
1252 * transmit holding register is empty. This functionality
1253 * allows an RS485 driver to be written in user space.
1255 static int mxser_get_lsr_info(struct mxser_port
*info
,
1256 unsigned int __user
*value
)
1258 unsigned char status
;
1259 unsigned int result
;
1260 unsigned long flags
;
1262 spin_lock_irqsave(&info
->slock
, flags
);
1263 status
= inb(info
->ioaddr
+ UART_LSR
);
1264 spin_unlock_irqrestore(&info
->slock
, flags
);
1265 result
= ((status
& UART_LSR_TEMT
) ? TIOCSER_TEMT
: 0);
1266 return put_user(result
, value
);
1270 * This routine sends a break character out the serial port.
1272 static void mxser_send_break(struct mxser_port
*info
, int duration
)
1274 unsigned long flags
;
1278 set_current_state(TASK_INTERRUPTIBLE
);
1279 spin_lock_irqsave(&info
->slock
, flags
);
1280 outb(inb(info
->ioaddr
+ UART_LCR
) | UART_LCR_SBC
,
1281 info
->ioaddr
+ UART_LCR
);
1282 spin_unlock_irqrestore(&info
->slock
, flags
);
1283 schedule_timeout(duration
);
1284 spin_lock_irqsave(&info
->slock
, flags
);
1285 outb(inb(info
->ioaddr
+ UART_LCR
) & ~UART_LCR_SBC
,
1286 info
->ioaddr
+ UART_LCR
);
1287 spin_unlock_irqrestore(&info
->slock
, flags
);
1290 static int mxser_tiocmget(struct tty_struct
*tty
, struct file
*file
)
1292 struct mxser_port
*info
= tty
->driver_data
;
1293 unsigned char control
, status
;
1294 unsigned long flags
;
1297 if (tty
->index
== MXSER_PORTS
)
1298 return -ENOIOCTLCMD
;
1299 if (test_bit(TTY_IO_ERROR
, &tty
->flags
))
1302 control
= info
->MCR
;
1304 spin_lock_irqsave(&info
->slock
, flags
);
1305 status
= inb(info
->ioaddr
+ UART_MSR
);
1306 if (status
& UART_MSR_ANY_DELTA
)
1307 mxser_check_modem_status(info
, status
);
1308 spin_unlock_irqrestore(&info
->slock
, flags
);
1309 return ((control
& UART_MCR_RTS
) ? TIOCM_RTS
: 0) |
1310 ((control
& UART_MCR_DTR
) ? TIOCM_DTR
: 0) |
1311 ((status
& UART_MSR_DCD
) ? TIOCM_CAR
: 0) |
1312 ((status
& UART_MSR_RI
) ? TIOCM_RNG
: 0) |
1313 ((status
& UART_MSR_DSR
) ? TIOCM_DSR
: 0) |
1314 ((status
& UART_MSR_CTS
) ? TIOCM_CTS
: 0);
1317 static int mxser_tiocmset(struct tty_struct
*tty
, struct file
*file
,
1318 unsigned int set
, unsigned int clear
)
1320 struct mxser_port
*info
= tty
->driver_data
;
1321 unsigned long flags
;
1324 if (tty
->index
== MXSER_PORTS
)
1325 return -ENOIOCTLCMD
;
1326 if (test_bit(TTY_IO_ERROR
, &tty
->flags
))
1329 spin_lock_irqsave(&info
->slock
, flags
);
1331 if (set
& TIOCM_RTS
)
1332 info
->MCR
|= UART_MCR_RTS
;
1333 if (set
& TIOCM_DTR
)
1334 info
->MCR
|= UART_MCR_DTR
;
1336 if (clear
& TIOCM_RTS
)
1337 info
->MCR
&= ~UART_MCR_RTS
;
1338 if (clear
& TIOCM_DTR
)
1339 info
->MCR
&= ~UART_MCR_DTR
;
1341 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
1342 spin_unlock_irqrestore(&info
->slock
, flags
);
1346 static int __init
mxser_program_mode(int port
)
1358 id
= inb(port
+ 1) & 0x1F;
1359 if ((id
!= C168_ASIC_ID
) &&
1360 (id
!= C104_ASIC_ID
) &&
1361 (id
!= C102_ASIC_ID
) &&
1362 (id
!= CI132_ASIC_ID
) &&
1363 (id
!= CI134_ASIC_ID
) &&
1364 (id
!= CI104J_ASIC_ID
))
1366 for (i
= 0, j
= 0; i
< 4; i
++) {
1370 } else if ((j
== 1) && (n
== 1)) {
1381 static void __init
mxser_normal_mode(int port
)
1385 outb(0xA5, port
+ 1);
1386 outb(0x80, port
+ 3);
1387 outb(12, port
+ 0); /* 9600 bps */
1389 outb(0x03, port
+ 3); /* 8 data bits */
1390 outb(0x13, port
+ 4); /* loop back mode */
1391 for (i
= 0; i
< 16; i
++) {
1393 if ((n
& 0x61) == 0x60)
1398 outb(0x00, port
+ 4);
1401 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
1402 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
1403 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
1404 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
1405 #define EN_CCMD 0x000 /* Chip's command register */
1406 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
1407 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
1408 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
1409 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
1410 #define EN0_DCFG 0x00E /* Data configuration reg WR */
1411 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
1412 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
1413 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
1414 static int __init
mxser_read_register(int port
, unsigned short *regs
)
1416 int i
, k
, value
, id
;
1419 id
= mxser_program_mode(port
);
1422 for (i
= 0; i
< 14; i
++) {
1423 k
= (i
& 0x3F) | 0x180;
1424 for (j
= 0x100; j
> 0; j
>>= 1) {
1425 outb(CHIP_CS
, port
);
1427 outb(CHIP_CS
| CHIP_DO
, port
);
1428 outb(CHIP_CS
| CHIP_DO
| CHIP_SK
, port
); /* A? bit of read */
1430 outb(CHIP_CS
, port
);
1431 outb(CHIP_CS
| CHIP_SK
, port
); /* A? bit of read */
1436 for (k
= 0, j
= 0x8000; k
< 16; k
++, j
>>= 1) {
1437 outb(CHIP_CS
, port
);
1438 outb(CHIP_CS
| CHIP_SK
, port
);
1439 if (inb(port
) & CHIP_DI
)
1445 mxser_normal_mode(port
);
1449 static int mxser_ioctl_special(unsigned int cmd
, void __user
*argp
)
1451 struct mxser_port
*port
;
1457 /* if (copy_to_user(argp, mxsercfg,
1458 sizeof(struct mxser_hwconf) * 4))
1462 case MOXA_GET_MAJOR
:
1463 if (copy_to_user(argp
, &ttymajor
, sizeof(int)))
1467 case MOXA_GET_CUMAJOR
:
1468 if (copy_to_user(argp
, &calloutmajor
, sizeof(int)))
1472 case MOXA_CHKPORTENABLE
:
1475 for (i
= 0; i
< MXSER_BOARDS
; i
++)
1476 for (j
= 0; j
< MXSER_PORTS_PER_BOARD
; j
++)
1477 if (mxser_boards
[i
].ports
[j
].ioaddr
)
1480 return put_user(result
, (unsigned long __user
*)argp
);
1481 case MOXA_GETDATACOUNT
:
1482 if (copy_to_user(argp
, &mxvar_log
, sizeof(mxvar_log
)))
1485 case MOXA_GETMSTATUS
:
1486 for (i
= 0; i
< MXSER_BOARDS
; i
++)
1487 for (j
= 0; j
< MXSER_PORTS_PER_BOARD
; j
++) {
1488 port
= &mxser_boards
[i
].ports
[j
];
1491 if (!port
->ioaddr
) {
1492 GMStatus
[i
].dcd
= 0;
1493 GMStatus
[i
].dsr
= 0;
1494 GMStatus
[i
].cts
= 0;
1498 if (!port
->tty
|| !port
->tty
->termios
)
1500 port
->normal_termios
.c_cflag
;
1503 port
->tty
->termios
->c_cflag
;
1505 status
= inb(port
->ioaddr
+ UART_MSR
);
1506 if (status
& 0x80 /*UART_MSR_DCD */ )
1507 GMStatus
[i
].dcd
= 1;
1509 GMStatus
[i
].dcd
= 0;
1511 if (status
& 0x20 /*UART_MSR_DSR */ )
1512 GMStatus
[i
].dsr
= 1;
1514 GMStatus
[i
].dsr
= 0;
1517 if (status
& 0x10 /*UART_MSR_CTS */ )
1518 GMStatus
[i
].cts
= 1;
1520 GMStatus
[i
].cts
= 0;
1522 if (copy_to_user(argp
, GMStatus
,
1523 sizeof(struct mxser_mstatus
) * MXSER_PORTS
))
1526 case MOXA_ASPP_MON_EXT
: {
1527 int status
, p
, shiftbit
;
1528 unsigned long opmode
;
1529 unsigned cflag
, iflag
;
1531 for (i
= 0; i
< MXSER_BOARDS
; i
++)
1532 for (j
= 0; j
< MXSER_PORTS_PER_BOARD
; j
++) {
1533 port
= &mxser_boards
[i
].ports
[j
];
1537 status
= mxser_get_msr(port
->ioaddr
, 0, i
);
1539 if (status
& UART_MSR_TERI
)
1541 if (status
& UART_MSR_DDSR
)
1543 if (status
& UART_MSR_DDCD
)
1545 if (status
& UART_MSR_DCTS
)
1548 port
->mon_data
.modem_status
= status
;
1549 mon_data_ext
.rx_cnt
[i
] = port
->mon_data
.rxcnt
;
1550 mon_data_ext
.tx_cnt
[i
] = port
->mon_data
.txcnt
;
1551 mon_data_ext
.up_rxcnt
[i
] =
1552 port
->mon_data
.up_rxcnt
;
1553 mon_data_ext
.up_txcnt
[i
] =
1554 port
->mon_data
.up_txcnt
;
1555 mon_data_ext
.modem_status
[i
] =
1556 port
->mon_data
.modem_status
;
1557 mon_data_ext
.baudrate
[i
] = port
->realbaud
;
1559 if (!port
->tty
|| !port
->tty
->termios
) {
1560 cflag
= port
->normal_termios
.c_cflag
;
1561 iflag
= port
->normal_termios
.c_iflag
;
1563 cflag
= port
->tty
->termios
->c_cflag
;
1564 iflag
= port
->tty
->termios
->c_iflag
;
1567 mon_data_ext
.databits
[i
] = cflag
& CSIZE
;
1569 mon_data_ext
.stopbits
[i
] = cflag
& CSTOPB
;
1571 mon_data_ext
.parity
[i
] =
1572 cflag
& (PARENB
| PARODD
| CMSPAR
);
1574 mon_data_ext
.flowctrl
[i
] = 0x00;
1576 if (cflag
& CRTSCTS
)
1577 mon_data_ext
.flowctrl
[i
] |= 0x03;
1579 if (iflag
& (IXON
| IXOFF
))
1580 mon_data_ext
.flowctrl
[i
] |= 0x0C;
1582 if (port
->type
== PORT_16550A
)
1583 mon_data_ext
.fifo
[i
] = 1;
1585 mon_data_ext
.fifo
[i
] = 0;
1589 opmode
= inb(port
->opmode_ioaddr
) >> shiftbit
;
1590 opmode
&= OP_MODE_MASK
;
1592 mon_data_ext
.iftype
[i
] = opmode
;
1595 if (copy_to_user(argp
, &mon_data_ext
,
1596 sizeof(mon_data_ext
)))
1602 return -ENOIOCTLCMD
;
1607 static int mxser_ioctl(struct tty_struct
*tty
, struct file
*file
,
1608 unsigned int cmd
, unsigned long arg
)
1610 struct mxser_port
*info
= tty
->driver_data
;
1611 struct async_icount cprev
, cnow
; /* kernel counter temps */
1612 struct serial_icounter_struct __user
*p_cuser
;
1613 unsigned long templ
;
1614 unsigned long flags
;
1615 void __user
*argp
= (void __user
*)arg
;
1618 if (tty
->index
== MXSER_PORTS
)
1619 return mxser_ioctl_special(cmd
, argp
);
1621 if (cmd
== MOXA_SET_OP_MODE
|| cmd
== MOXA_GET_OP_MODE
) {
1623 unsigned long opmode
;
1624 static unsigned char ModeMask
[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1626 unsigned char val
, mask
;
1629 if (cmd
== MOXA_SET_OP_MODE
) {
1630 if (get_user(opmode
, (int __user
*) argp
))
1632 if (opmode
!= RS232_MODE
&&
1633 opmode
!= RS485_2WIRE_MODE
&&
1634 opmode
!= RS422_MODE
&&
1635 opmode
!= RS485_4WIRE_MODE
)
1639 val
= inb(info
->opmode_ioaddr
);
1641 val
|= (opmode
<< shiftbit
);
1642 outb(val
, info
->opmode_ioaddr
);
1645 opmode
= inb(info
->opmode_ioaddr
) >> shiftbit
;
1646 opmode
&= OP_MODE_MASK
;
1647 if (copy_to_user(argp
, &opmode
, sizeof(int)))
1653 if (cmd
!= TIOCGSERIAL
&& cmd
!= TIOCMIWAIT
&& cmd
!= TIOCGICOUNT
&&
1654 test_bit(TTY_IO_ERROR
, &tty
->flags
))
1658 case TCSBRK
: /* SVID version: non-zero arg --> no break */
1659 retval
= tty_check_change(tty
);
1662 tty_wait_until_sent(tty
, 0);
1664 mxser_send_break(info
, HZ
/ 4); /* 1/4 second */
1666 case TCSBRKP
: /* support for POSIX tcsendbreak() */
1667 retval
= tty_check_change(tty
);
1670 tty_wait_until_sent(tty
, 0);
1671 mxser_send_break(info
, arg
? arg
* (HZ
/ 10) : HZ
/ 4);
1674 return put_user(C_CLOCAL(tty
) ? 1 : 0, (unsigned long __user
*)argp
);
1676 if (get_user(templ
, (unsigned long __user
*) argp
))
1679 tty
->termios
->c_cflag
= ((tty
->termios
->c_cflag
& ~CLOCAL
) | (arg
? CLOCAL
: 0));
1682 return mxser_get_serial_info(info
, argp
);
1684 return mxser_set_serial_info(info
, argp
);
1685 case TIOCSERGETLSR
: /* Get line status register */
1686 return mxser_get_lsr_info(info
, argp
);
1688 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1689 * - mask passed in arg for lines of interest
1690 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1691 * Caller should use TIOCGICOUNT to see which one it was
1694 DECLARE_WAITQUEUE(wait
, current
);
1696 spin_lock_irqsave(&info
->slock
, flags
);
1697 cprev
= info
->icount
; /* note the counters on entry */
1698 spin_unlock_irqrestore(&info
->slock
, flags
);
1700 add_wait_queue(&info
->delta_msr_wait
, &wait
);
1702 spin_lock_irqsave(&info
->slock
, flags
);
1703 cnow
= info
->icount
; /* atomic copy */
1704 spin_unlock_irqrestore(&info
->slock
, flags
);
1706 set_current_state(TASK_INTERRUPTIBLE
);
1707 if (((arg
& TIOCM_RNG
) &&
1708 (cnow
.rng
!= cprev
.rng
)) ||
1709 ((arg
& TIOCM_DSR
) &&
1710 (cnow
.dsr
!= cprev
.dsr
)) ||
1711 ((arg
& TIOCM_CD
) &&
1712 (cnow
.dcd
!= cprev
.dcd
)) ||
1713 ((arg
& TIOCM_CTS
) &&
1714 (cnow
.cts
!= cprev
.cts
))) {
1718 /* see if a signal did it */
1719 if (signal_pending(current
)) {
1725 current
->state
= TASK_RUNNING
;
1726 remove_wait_queue(&info
->delta_msr_wait
, &wait
);
1731 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1732 * Return: write counters to the user passed counter struct
1733 * NB: both 1->0 and 0->1 transitions are counted except for
1734 * RI where only 0->1 is counted.
1737 spin_lock_irqsave(&info
->slock
, flags
);
1738 cnow
= info
->icount
;
1739 spin_unlock_irqrestore(&info
->slock
, flags
);
1741 if (put_user(cnow
.frame
, &p_cuser
->frame
))
1743 if (put_user(cnow
.brk
, &p_cuser
->brk
))
1745 if (put_user(cnow
.overrun
, &p_cuser
->overrun
))
1747 if (put_user(cnow
.buf_overrun
, &p_cuser
->buf_overrun
))
1749 if (put_user(cnow
.parity
, &p_cuser
->parity
))
1751 if (put_user(cnow
.rx
, &p_cuser
->rx
))
1753 if (put_user(cnow
.tx
, &p_cuser
->tx
))
1755 put_user(cnow
.cts
, &p_cuser
->cts
);
1756 put_user(cnow
.dsr
, &p_cuser
->dsr
);
1757 put_user(cnow
.rng
, &p_cuser
->rng
);
1758 put_user(cnow
.dcd
, &p_cuser
->dcd
);
1760 case MOXA_HighSpeedOn
:
1761 return put_user(info
->baud_base
!= 115200 ? 1 : 0, (int __user
*)argp
);
1762 case MOXA_SDS_RSTICOUNTER
:
1763 info
->mon_data
.rxcnt
= 0;
1764 info
->mon_data
.txcnt
= 0;
1766 case MOXA_ASPP_SETBAUD
:{
1768 if (get_user(baud
, (long __user
*)argp
))
1770 mxser_set_baud(info
, baud
);
1773 case MOXA_ASPP_GETBAUD
:
1774 if (copy_to_user(argp
, &info
->realbaud
, sizeof(long)))
1779 case MOXA_ASPP_OQUEUE
:{
1782 len
= mxser_chars_in_buffer(tty
);
1784 lsr
= inb(info
->ioaddr
+ UART_LSR
) & UART_LSR_TEMT
;
1786 len
+= (lsr
? 0 : 1);
1788 if (copy_to_user(argp
, &len
, sizeof(int)))
1793 case MOXA_ASPP_MON
: {
1796 status
= mxser_get_msr(info
->ioaddr
, 1, tty
->index
);
1797 mxser_check_modem_status(info
, status
);
1799 mcr
= inb(info
->ioaddr
+ UART_MCR
);
1800 if (mcr
& MOXA_MUST_MCR_XON_FLAG
)
1801 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_XOFFHOLD
;
1803 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_XOFFHOLD
;
1805 if (mcr
& MOXA_MUST_MCR_TX_XON
)
1806 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_XOFFXENT
;
1808 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_XOFFXENT
;
1810 if (info
->tty
->hw_stopped
)
1811 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_CTSHOLD
;
1813 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_CTSHOLD
;
1815 if (copy_to_user(argp
, &info
->mon_data
,
1816 sizeof(struct mxser_mon
)))
1821 case MOXA_ASPP_LSTATUS
: {
1822 if (copy_to_user(argp
, &info
->err_shadow
,
1823 sizeof(unsigned char)))
1826 info
->err_shadow
= 0;
1829 case MOXA_SET_BAUD_METHOD
: {
1832 if (get_user(method
, (int __user
*)argp
))
1834 mxser_set_baud_method
[tty
->index
] = method
;
1835 if (copy_to_user(argp
, &method
, sizeof(int)))
1841 return -ENOIOCTLCMD
;
1846 static void mxser_stoprx(struct tty_struct
*tty
)
1848 struct mxser_port
*info
= tty
->driver_data
;
1850 info
->ldisc_stop_rx
= 1;
1852 if (info
->board
->chip_flag
) {
1853 info
->IER
&= ~MOXA_MUST_RECV_ISR
;
1854 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1856 info
->x_char
= STOP_CHAR(tty
);
1857 outb(0, info
->ioaddr
+ UART_IER
);
1858 info
->IER
|= UART_IER_THRI
;
1859 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1863 if (info
->tty
->termios
->c_cflag
& CRTSCTS
) {
1864 info
->MCR
&= ~UART_MCR_RTS
;
1865 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
1870 * This routine is called by the upper-layer tty layer to signal that
1871 * incoming characters should be throttled.
1873 static void mxser_throttle(struct tty_struct
*tty
)
1878 static void mxser_unthrottle(struct tty_struct
*tty
)
1880 struct mxser_port
*info
= tty
->driver_data
;
1883 info
->ldisc_stop_rx
= 0;
1888 if (info
->board
->chip_flag
) {
1889 info
->IER
|= MOXA_MUST_RECV_ISR
;
1890 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1892 info
->x_char
= START_CHAR(tty
);
1893 outb(0, info
->ioaddr
+ UART_IER
);
1894 info
->IER
|= UART_IER_THRI
;
1895 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1900 if (info
->tty
->termios
->c_cflag
& CRTSCTS
) {
1901 info
->MCR
|= UART_MCR_RTS
;
1902 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
1907 * mxser_stop() and mxser_start()
1909 * This routines are called before setting or resetting tty->stopped.
1910 * They enable or disable transmitter interrupts, as necessary.
1912 static void mxser_stop(struct tty_struct
*tty
)
1914 struct mxser_port
*info
= tty
->driver_data
;
1915 unsigned long flags
;
1917 spin_lock_irqsave(&info
->slock
, flags
);
1918 if (info
->IER
& UART_IER_THRI
) {
1919 info
->IER
&= ~UART_IER_THRI
;
1920 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1922 spin_unlock_irqrestore(&info
->slock
, flags
);
1925 static void mxser_start(struct tty_struct
*tty
)
1927 struct mxser_port
*info
= tty
->driver_data
;
1928 unsigned long flags
;
1930 spin_lock_irqsave(&info
->slock
, flags
);
1931 if (info
->xmit_cnt
&& info
->xmit_buf
) {
1932 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
1933 info
->IER
|= UART_IER_THRI
;
1934 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1936 spin_unlock_irqrestore(&info
->slock
, flags
);
1939 static void mxser_set_termios(struct tty_struct
*tty
, struct ktermios
*old_termios
)
1941 struct mxser_port
*info
= tty
->driver_data
;
1942 unsigned long flags
;
1944 if ((tty
->termios
->c_cflag
!= old_termios
->c_cflag
) ||
1945 (RELEVANT_IFLAG(tty
->termios
->c_iflag
) != RELEVANT_IFLAG(old_termios
->c_iflag
))) {
1947 mxser_change_speed(info
, old_termios
);
1949 if ((old_termios
->c_cflag
& CRTSCTS
) &&
1950 !(tty
->termios
->c_cflag
& CRTSCTS
)) {
1951 tty
->hw_stopped
= 0;
1956 /* Handle sw stopped */
1957 if ((old_termios
->c_iflag
& IXON
) &&
1958 !(tty
->termios
->c_iflag
& IXON
)) {
1961 if (info
->board
->chip_flag
) {
1962 spin_lock_irqsave(&info
->slock
, flags
);
1963 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info
->ioaddr
);
1964 spin_unlock_irqrestore(&info
->slock
, flags
);
1972 * mxser_wait_until_sent() --- wait until the transmitter is empty
1974 static void mxser_wait_until_sent(struct tty_struct
*tty
, int timeout
)
1976 struct mxser_port
*info
= tty
->driver_data
;
1977 unsigned long orig_jiffies
, char_time
;
1980 if (info
->type
== PORT_UNKNOWN
)
1983 if (info
->xmit_fifo_size
== 0)
1984 return; /* Just in case.... */
1986 orig_jiffies
= jiffies
;
1988 * Set the check interval to be 1/5 of the estimated time to
1989 * send a single character, and make it at least 1. The check
1990 * interval should also be less than the timeout.
1992 * Note: we have to use pretty tight timings here to satisfy
1995 char_time
= (info
->timeout
- HZ
/ 50) / info
->xmit_fifo_size
;
1996 char_time
= char_time
/ 5;
1999 if (timeout
&& timeout
< char_time
)
2000 char_time
= timeout
;
2002 * If the transmitter hasn't cleared in twice the approximate
2003 * amount of time to send the entire FIFO, it probably won't
2004 * ever clear. This assumes the UART isn't doing flow
2005 * control, which is currently the case. Hence, if it ever
2006 * takes longer than info->timeout, this is probably due to a
2007 * UART bug of some kind. So, we clamp the timeout parameter at
2010 if (!timeout
|| timeout
> 2 * info
->timeout
)
2011 timeout
= 2 * info
->timeout
;
2012 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2013 printk(KERN_DEBUG
"In rs_wait_until_sent(%d) check=%lu...",
2014 timeout
, char_time
);
2015 printk("jiff=%lu...", jiffies
);
2017 while (!((lsr
= inb(info
->ioaddr
+ UART_LSR
)) & UART_LSR_TEMT
)) {
2018 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2019 printk("lsr = %d (jiff=%lu)...", lsr
, jiffies
);
2021 schedule_timeout_interruptible(char_time
);
2022 if (signal_pending(current
))
2024 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2027 set_current_state(TASK_RUNNING
);
2029 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2030 printk("lsr = %d (jiff=%lu)...done\n", lsr
, jiffies
);
2035 * This routine is called by tty_hangup() when a hangup is signaled.
2037 static void mxser_hangup(struct tty_struct
*tty
)
2039 struct mxser_port
*info
= tty
->driver_data
;
2041 mxser_flush_buffer(tty
);
2042 mxser_shutdown(info
);
2045 info
->flags
&= ~ASYNC_NORMAL_ACTIVE
;
2047 wake_up_interruptible(&info
->open_wait
);
2051 * mxser_rs_break() --- routine which turns the break handling on or off
2053 static void mxser_rs_break(struct tty_struct
*tty
, int break_state
)
2055 struct mxser_port
*info
= tty
->driver_data
;
2056 unsigned long flags
;
2058 spin_lock_irqsave(&info
->slock
, flags
);
2059 if (break_state
== -1)
2060 outb(inb(info
->ioaddr
+ UART_LCR
) | UART_LCR_SBC
,
2061 info
->ioaddr
+ UART_LCR
);
2063 outb(inb(info
->ioaddr
+ UART_LCR
) & ~UART_LCR_SBC
,
2064 info
->ioaddr
+ UART_LCR
);
2065 spin_unlock_irqrestore(&info
->slock
, flags
);
2068 static void mxser_receive_chars(struct mxser_port
*port
, int *status
)
2070 struct tty_struct
*tty
= port
->tty
;
2071 unsigned char ch
, gdl
;
2076 unsigned long flags
;
2078 spin_lock_irqsave(&port
->slock
, flags
);
2080 recv_room
= tty
->receive_room
;
2081 if ((recv_room
== 0) && (!port
->ldisc_stop_rx
))
2084 if (port
->board
->chip_flag
!= MOXA_OTHER_UART
) {
2086 if (*status
& UART_LSR_SPECIAL
)
2088 if (port
->board
->chip_flag
== MOXA_MUST_MU860_HWID
&&
2089 (*status
& MOXA_MUST_LSR_RERR
))
2091 if (*status
& MOXA_MUST_LSR_RERR
)
2094 gdl
= inb(port
->ioaddr
+ MOXA_MUST_GDL_REGISTER
);
2096 if (port
->board
->chip_flag
== MOXA_MUST_MU150_HWID
)
2097 gdl
&= MOXA_MUST_GDL_MASK
;
2098 if (gdl
>= recv_room
) {
2099 if (!port
->ldisc_stop_rx
)
2103 ch
= inb(port
->ioaddr
+ UART_RX
);
2104 tty_insert_flip_char(tty
, ch
, 0);
2115 ch
= inb(port
->ioaddr
+ UART_RX
);
2116 if (port
->board
->chip_flag
&& (*status
& UART_LSR_OE
))
2117 outb(0x23, port
->ioaddr
+ UART_FCR
);
2118 *status
&= port
->read_status_mask
;
2119 if (*status
& port
->ignore_status_mask
) {
2120 if (++ignored
> 100)
2124 if (*status
& UART_LSR_SPECIAL
) {
2125 if (*status
& UART_LSR_BI
) {
2129 if (port
->flags
& ASYNC_SAK
)
2131 } else if (*status
& UART_LSR_PE
) {
2133 port
->icount
.parity
++;
2134 } else if (*status
& UART_LSR_FE
) {
2136 port
->icount
.frame
++;
2137 } else if (*status
& UART_LSR_OE
) {
2139 port
->icount
.overrun
++;
2142 tty_insert_flip_char(tty
, ch
, flag
);
2144 if (cnt
>= recv_room
) {
2145 if (!port
->ldisc_stop_rx
)
2152 if (port
->board
->chip_flag
)
2155 *status
= inb(port
->ioaddr
+ UART_LSR
);
2156 } while (*status
& UART_LSR_DR
);
2159 mxvar_log
.rxcnt
[port
->tty
->index
] += cnt
;
2160 port
->mon_data
.rxcnt
+= cnt
;
2161 port
->mon_data
.up_rxcnt
+= cnt
;
2162 spin_unlock_irqrestore(&port
->slock
, flags
);
2164 tty_flip_buffer_push(tty
);
2167 static void mxser_transmit_chars(struct mxser_port
*port
)
2170 unsigned long flags
;
2172 spin_lock_irqsave(&port
->slock
, flags
);
2175 outb(port
->x_char
, port
->ioaddr
+ UART_TX
);
2177 mxvar_log
.txcnt
[port
->tty
->index
]++;
2178 port
->mon_data
.txcnt
++;
2179 port
->mon_data
.up_txcnt
++;
2184 if (port
->xmit_buf
== 0)
2187 if ((port
->xmit_cnt
<= 0) || port
->tty
->stopped
||
2188 (port
->tty
->hw_stopped
&&
2189 (port
->type
!= PORT_16550A
) &&
2190 (!port
->board
->chip_flag
))) {
2191 port
->IER
&= ~UART_IER_THRI
;
2192 outb(port
->IER
, port
->ioaddr
+ UART_IER
);
2196 cnt
= port
->xmit_cnt
;
2197 count
= port
->xmit_fifo_size
;
2199 outb(port
->xmit_buf
[port
->xmit_tail
++],
2200 port
->ioaddr
+ UART_TX
);
2201 port
->xmit_tail
= port
->xmit_tail
& (SERIAL_XMIT_SIZE
- 1);
2202 if (--port
->xmit_cnt
<= 0)
2204 } while (--count
> 0);
2205 mxvar_log
.txcnt
[port
->tty
->index
] += (cnt
- port
->xmit_cnt
);
2207 port
->mon_data
.txcnt
+= (cnt
- port
->xmit_cnt
);
2208 port
->mon_data
.up_txcnt
+= (cnt
- port
->xmit_cnt
);
2209 port
->icount
.tx
+= (cnt
- port
->xmit_cnt
);
2211 if (port
->xmit_cnt
< WAKEUP_CHARS
)
2212 tty_wakeup(port
->tty
);
2214 if (port
->xmit_cnt
<= 0) {
2215 port
->IER
&= ~UART_IER_THRI
;
2216 outb(port
->IER
, port
->ioaddr
+ UART_IER
);
2219 spin_unlock_irqrestore(&port
->slock
, flags
);
2223 * This is the serial driver's generic interrupt routine
2225 static irqreturn_t
mxser_interrupt(int irq
, void *dev_id
)
2228 struct mxser_board
*brd
= NULL
;
2229 struct mxser_port
*port
;
2230 int max
, irqbits
, bits
, msr
;
2231 int pass_counter
= 0;
2232 unsigned int int_cnt
;
2233 int handled
= IRQ_NONE
;
2235 for (i
= 0; i
< MXSER_BOARDS
; i
++)
2236 if (dev_id
== &mxser_boards
[i
]) {
2241 if (i
== MXSER_BOARDS
)
2245 max
= brd
->info
->nports
;
2247 irqbits
= inb(brd
->vector
) & brd
->vector_mask
;
2248 if (irqbits
== brd
->vector_mask
)
2251 handled
= IRQ_HANDLED
;
2252 for (i
= 0, bits
= 1; i
< max
; i
++, irqbits
|= bits
, bits
<<= 1) {
2253 if (irqbits
== brd
->vector_mask
)
2257 port
= &brd
->ports
[i
];
2261 iir
= inb(port
->ioaddr
+ UART_IIR
);
2262 if (iir
& UART_IIR_NO_INT
)
2264 iir
&= MOXA_MUST_IIR_MASK
;
2266 status
= inb(port
->ioaddr
+ UART_LSR
);
2267 outb(0x27, port
->ioaddr
+ UART_FCR
);
2268 inb(port
->ioaddr
+ UART_MSR
);
2272 status
= inb(port
->ioaddr
+ UART_LSR
);
2274 if (status
& UART_LSR_PE
)
2275 port
->err_shadow
|= NPPI_NOTIFY_PARITY
;
2276 if (status
& UART_LSR_FE
)
2277 port
->err_shadow
|= NPPI_NOTIFY_FRAMING
;
2278 if (status
& UART_LSR_OE
)
2280 NPPI_NOTIFY_HW_OVERRUN
;
2281 if (status
& UART_LSR_BI
)
2282 port
->err_shadow
|= NPPI_NOTIFY_BREAK
;
2284 if (port
->board
->chip_flag
) {
2285 if (iir
== MOXA_MUST_IIR_GDA
||
2286 iir
== MOXA_MUST_IIR_RDA
||
2287 iir
== MOXA_MUST_IIR_RTO
||
2288 iir
== MOXA_MUST_IIR_LSR
)
2289 mxser_receive_chars(port
,
2293 status
&= port
->read_status_mask
;
2294 if (status
& UART_LSR_DR
)
2295 mxser_receive_chars(port
,
2298 msr
= inb(port
->ioaddr
+ UART_MSR
);
2299 if (msr
& UART_MSR_ANY_DELTA
)
2300 mxser_check_modem_status(port
, msr
);
2302 if (port
->board
->chip_flag
) {
2303 if (iir
== 0x02 && (status
&
2305 mxser_transmit_chars(port
);
2307 if (status
& UART_LSR_THRE
)
2308 mxser_transmit_chars(port
);
2310 } while (int_cnt
++ < MXSER_ISR_PASS_LIMIT
);
2312 if (pass_counter
++ > MXSER_ISR_PASS_LIMIT
)
2313 break; /* Prevent infinite loops */
2320 static const struct tty_operations mxser_ops
= {
2322 .close
= mxser_close
,
2323 .write
= mxser_write
,
2324 .put_char
= mxser_put_char
,
2325 .flush_chars
= mxser_flush_chars
,
2326 .write_room
= mxser_write_room
,
2327 .chars_in_buffer
= mxser_chars_in_buffer
,
2328 .flush_buffer
= mxser_flush_buffer
,
2329 .ioctl
= mxser_ioctl
,
2330 .throttle
= mxser_throttle
,
2331 .unthrottle
= mxser_unthrottle
,
2332 .set_termios
= mxser_set_termios
,
2334 .start
= mxser_start
,
2335 .hangup
= mxser_hangup
,
2336 .break_ctl
= mxser_rs_break
,
2337 .wait_until_sent
= mxser_wait_until_sent
,
2338 .tiocmget
= mxser_tiocmget
,
2339 .tiocmset
= mxser_tiocmset
,
2343 * The MOXA Smartio/Industio serial driver boot-time initialization code!
2346 static void mxser_release_res(struct mxser_board
*brd
, struct pci_dev
*pdev
,
2350 free_irq(brd
->irq
, brd
);
2351 if (pdev
!= NULL
) { /* PCI */
2353 pci_release_region(pdev
, 2);
2354 pci_release_region(pdev
, 3);
2358 release_region(brd
->ports
[0].ioaddr
, 8 * brd
->info
->nports
);
2359 release_region(brd
->vector
, 1);
2363 static int __devinit
mxser_initbrd(struct mxser_board
*brd
,
2364 struct pci_dev
*pdev
)
2366 struct mxser_port
*info
;
2370 printk(KERN_INFO
"max. baud rate = %d bps.\n", brd
->ports
[0].max_baud
);
2372 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2373 info
= &brd
->ports
[i
];
2376 info
->ldisc_stop_rx
= 0;
2378 /* Enhance mode enabled here */
2379 if (brd
->chip_flag
!= MOXA_OTHER_UART
)
2380 ENABLE_MOXA_MUST_ENCHANCE_MODE(info
->ioaddr
);
2382 info
->flags
= ASYNC_SHARE_IRQ
;
2383 info
->type
= brd
->uart_type
;
2385 process_txrx_fifo(info
);
2387 info
->custom_divisor
= info
->baud_base
* 16;
2388 info
->close_delay
= 5 * HZ
/ 10;
2389 info
->closing_wait
= 30 * HZ
;
2390 info
->normal_termios
= mxvar_sdriver
->init_termios
;
2391 init_waitqueue_head(&info
->open_wait
);
2392 init_waitqueue_head(&info
->delta_msr_wait
);
2393 memset(&info
->mon_data
, 0, sizeof(struct mxser_mon
));
2394 info
->err_shadow
= 0;
2395 spin_lock_init(&info
->slock
);
2397 /* before set INT ISR, disable all int */
2398 outb(inb(info
->ioaddr
+ UART_IER
) & 0xf0,
2399 info
->ioaddr
+ UART_IER
);
2402 retval
= request_irq(brd
->irq
, mxser_interrupt
, IRQF_SHARED
, "mxser",
2405 printk(KERN_ERR
"Board %s: Request irq failed, IRQ (%d) may "
2406 "conflict with another device.\n",
2407 brd
->info
->name
, brd
->irq
);
2408 /* We hold resources, we need to release them. */
2409 mxser_release_res(brd
, pdev
, 0);
2415 static int __init
mxser_get_ISA_conf(int cap
, struct mxser_board
*brd
)
2418 unsigned short regs
[16], irq
;
2419 unsigned char scratch
, scratch2
;
2421 brd
->chip_flag
= MOXA_OTHER_UART
;
2423 id
= mxser_read_register(cap
, regs
);
2426 brd
->info
= &mxser_cards
[0];
2429 brd
->info
= &mxser_cards
[1];
2431 case CI104J_ASIC_ID
:
2432 brd
->info
= &mxser_cards
[2];
2435 brd
->info
= &mxser_cards
[5];
2438 brd
->info
= &mxser_cards
[6];
2441 brd
->info
= &mxser_cards
[7];
2448 /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2449 Flag-hack checks if configuration should be read as 2-port here. */
2450 if (brd
->info
->nports
== 2 || (brd
->info
->flags
& MXSER_HAS2
)) {
2451 irq
= regs
[9] & 0xF000;
2452 irq
= irq
| (irq
>> 4);
2453 if (irq
!= (regs
[9] & 0xFF00))
2454 return MXSER_ERR_IRQ_CONFLIT
;
2455 } else if (brd
->info
->nports
== 4) {
2456 irq
= regs
[9] & 0xF000;
2457 irq
= irq
| (irq
>> 4);
2458 irq
= irq
| (irq
>> 8);
2460 return MXSER_ERR_IRQ_CONFLIT
;
2461 } else if (brd
->info
->nports
== 8) {
2462 irq
= regs
[9] & 0xF000;
2463 irq
= irq
| (irq
>> 4);
2464 irq
= irq
| (irq
>> 8);
2465 if ((irq
!= regs
[9]) || (irq
!= regs
[10]))
2466 return MXSER_ERR_IRQ_CONFLIT
;
2470 return MXSER_ERR_IRQ
;
2471 brd
->irq
= ((int)(irq
& 0xF000) >> 12);
2472 for (i
= 0; i
< 8; i
++)
2473 brd
->ports
[i
].ioaddr
= (int) regs
[i
+ 1] & 0xFFF8;
2474 if ((regs
[12] & 0x80) == 0)
2475 return MXSER_ERR_VECTOR
;
2476 brd
->vector
= (int)regs
[11]; /* interrupt vector */
2478 brd
->vector_mask
= 0x00FF;
2480 brd
->vector_mask
= 0x000F;
2481 for (i
= 7, bits
= 0x0100; i
>= 0; i
--, bits
<<= 1) {
2482 if (regs
[12] & bits
) {
2483 brd
->ports
[i
].baud_base
= 921600;
2484 brd
->ports
[i
].max_baud
= 921600;
2486 brd
->ports
[i
].baud_base
= 115200;
2487 brd
->ports
[i
].max_baud
= 115200;
2490 scratch2
= inb(cap
+ UART_LCR
) & (~UART_LCR_DLAB
);
2491 outb(scratch2
| UART_LCR_DLAB
, cap
+ UART_LCR
);
2492 outb(0, cap
+ UART_EFR
); /* EFR is the same as FCR */
2493 outb(scratch2
, cap
+ UART_LCR
);
2494 outb(UART_FCR_ENABLE_FIFO
, cap
+ UART_FCR
);
2495 scratch
= inb(cap
+ UART_IIR
);
2498 brd
->uart_type
= PORT_16550A
;
2500 brd
->uart_type
= PORT_16450
;
2501 if (!request_region(brd
->ports
[0].ioaddr
, 8 * brd
->info
->nports
,
2503 return MXSER_ERR_IOADDR
;
2504 if (!request_region(brd
->vector
, 1, "mxser(vector)")) {
2505 release_region(brd
->ports
[0].ioaddr
, 8 * brd
->info
->nports
);
2506 return MXSER_ERR_VECTOR
;
2508 return brd
->info
->nports
;
2511 static int __devinit
mxser_probe(struct pci_dev
*pdev
,
2512 const struct pci_device_id
*ent
)
2515 struct mxser_board
*brd
;
2517 unsigned long ioaddress
;
2518 int retval
= -EINVAL
;
2520 for (i
= 0; i
< MXSER_BOARDS
; i
++)
2521 if (mxser_boards
[i
].info
== NULL
)
2524 if (i
>= MXSER_BOARDS
) {
2525 printk(KERN_ERR
"Too many Smartio/Industio family boards found "
2526 "(maximum %d), board not configured\n", MXSER_BOARDS
);
2530 brd
= &mxser_boards
[i
];
2531 brd
->idx
= i
* MXSER_PORTS_PER_BOARD
;
2532 printk(KERN_INFO
"Found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2533 mxser_cards
[ent
->driver_data
].name
,
2534 pdev
->bus
->number
, PCI_SLOT(pdev
->devfn
));
2536 retval
= pci_enable_device(pdev
);
2538 printk(KERN_ERR
"Moxa SmartI/O PCI enable fail !\n");
2543 ioaddress
= pci_resource_start(pdev
, 2);
2544 retval
= pci_request_region(pdev
, 2, "mxser(IO)");
2548 brd
->info
= &mxser_cards
[ent
->driver_data
];
2549 for (i
= 0; i
< brd
->info
->nports
; i
++)
2550 brd
->ports
[i
].ioaddr
= ioaddress
+ 8 * i
;
2553 ioaddress
= pci_resource_start(pdev
, 3);
2554 retval
= pci_request_region(pdev
, 3, "mxser(vector)");
2557 brd
->vector
= ioaddress
;
2560 brd
->irq
= pdev
->irq
;
2562 brd
->chip_flag
= CheckIsMoxaMust(brd
->ports
[0].ioaddr
);
2563 brd
->uart_type
= PORT_16550A
;
2564 brd
->vector_mask
= 0;
2566 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2567 for (j
= 0; j
< UART_INFO_NUM
; j
++) {
2568 if (Gpci_uart_info
[j
].type
== brd
->chip_flag
) {
2569 brd
->ports
[i
].max_baud
=
2570 Gpci_uart_info
[j
].max_baud
;
2572 /* exception....CP-102 */
2573 if (brd
->info
->flags
& MXSER_HIGHBAUD
)
2574 brd
->ports
[i
].max_baud
= 921600;
2580 if (brd
->chip_flag
== MOXA_MUST_MU860_HWID
) {
2581 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2583 brd
->ports
[i
].opmode_ioaddr
= ioaddress
+ 4;
2585 brd
->ports
[i
].opmode_ioaddr
= ioaddress
+ 0x0c;
2587 outb(0, ioaddress
+ 4); /* default set to RS232 mode */
2588 outb(0, ioaddress
+ 0x0c); /* default set to RS232 mode */
2591 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2592 brd
->vector_mask
|= (1 << i
);
2593 brd
->ports
[i
].baud_base
= 921600;
2596 /* mxser_initbrd will hook ISR. */
2597 if (mxser_initbrd(brd
, pdev
) < 0)
2600 for (i
= 0; i
< brd
->info
->nports
; i
++)
2601 tty_register_device(mxvar_sdriver
, brd
->idx
+ i
, &pdev
->dev
);
2603 pci_set_drvdata(pdev
, brd
);
2607 pci_release_region(pdev
, 3);
2609 pci_release_region(pdev
, 2);
2618 static void __devexit
mxser_remove(struct pci_dev
*pdev
)
2620 struct mxser_board
*brd
= pci_get_drvdata(pdev
);
2623 for (i
= 0; i
< brd
->info
->nports
; i
++)
2624 tty_unregister_device(mxvar_sdriver
, brd
->idx
+ i
);
2626 mxser_release_res(brd
, pdev
, 1);
2629 static struct pci_driver mxser_driver
= {
2631 .id_table
= mxser_pcibrds
,
2632 .probe
= mxser_probe
,
2633 .remove
= __devexit_p(mxser_remove
)
2636 static int __init
mxser_module_init(void)
2638 struct mxser_board
*brd
;
2640 unsigned int i
, m
, isaloop
;
2643 pr_debug("Loading module mxser ...\n");
2645 mxvar_sdriver
= alloc_tty_driver(MXSER_PORTS
+ 1);
2649 printk(KERN_INFO
"MOXA Smartio/Industio family driver version %s\n",
2652 /* Initialize the tty_driver structure */
2653 mxvar_sdriver
->owner
= THIS_MODULE
;
2654 mxvar_sdriver
->magic
= TTY_DRIVER_MAGIC
;
2655 mxvar_sdriver
->name
= "ttyMI";
2656 mxvar_sdriver
->major
= ttymajor
;
2657 mxvar_sdriver
->minor_start
= 0;
2658 mxvar_sdriver
->num
= MXSER_PORTS
+ 1;
2659 mxvar_sdriver
->type
= TTY_DRIVER_TYPE_SERIAL
;
2660 mxvar_sdriver
->subtype
= SERIAL_TYPE_NORMAL
;
2661 mxvar_sdriver
->init_termios
= tty_std_termios
;
2662 mxvar_sdriver
->init_termios
.c_cflag
= B9600
|CS8
|CREAD
|HUPCL
|CLOCAL
;
2663 mxvar_sdriver
->flags
= TTY_DRIVER_REAL_RAW
|TTY_DRIVER_DYNAMIC_DEV
;
2664 tty_set_operations(mxvar_sdriver
, &mxser_ops
);
2666 retval
= tty_register_driver(mxvar_sdriver
);
2668 printk(KERN_ERR
"Couldn't install MOXA Smartio/Industio family "
2676 /* Start finding ISA boards here */
2677 for (isaloop
= 0; isaloop
< 2; isaloop
++)
2678 for (b
= 0; b
< MXSER_BOARDS
&& m
< MXSER_BOARDS
; b
++) {
2680 cap
= mxserBoardCAP
[b
]; /* predefined */
2682 cap
= ioaddr
[b
]; /* module param */
2687 brd
= &mxser_boards
[m
];
2688 retval
= mxser_get_ISA_conf(cap
, brd
);
2691 printk(KERN_INFO
"Found MOXA %s board "
2693 brd
->info
->name
, ioaddr
[b
]);
2696 if (retval
== MXSER_ERR_IRQ
)
2697 printk(KERN_ERR
"Invalid interrupt "
2698 "number, board not "
2700 else if (retval
== MXSER_ERR_IRQ_CONFLIT
)
2701 printk(KERN_ERR
"Invalid interrupt "
2702 "number, board not "
2704 else if (retval
== MXSER_ERR_VECTOR
)
2705 printk(KERN_ERR
"Invalid interrupt "
2706 "vector, board not "
2708 else if (retval
== MXSER_ERR_IOADDR
)
2709 printk(KERN_ERR
"Invalid I/O address, "
2710 "board not configured\n");
2716 /* mxser_initbrd will hook ISR. */
2717 if (mxser_initbrd(brd
, NULL
) < 0) {
2722 brd
->idx
= m
* MXSER_PORTS_PER_BOARD
;
2723 for (i
= 0; i
< brd
->info
->nports
; i
++)
2724 tty_register_device(mxvar_sdriver
, brd
->idx
+ i
,
2730 retval
= pci_register_driver(&mxser_driver
);
2732 printk(KERN_ERR
"Can't register pci driver\n");
2736 } /* else: we have some ISA cards under control */
2739 pr_debug("Done.\n");
2743 tty_unregister_driver(mxvar_sdriver
);
2745 put_tty_driver(mxvar_sdriver
);
2749 static void __exit
mxser_module_exit(void)
2753 pr_debug("Unloading module mxser ...\n");
2755 pci_unregister_driver(&mxser_driver
);
2757 for (i
= 0; i
< MXSER_BOARDS
; i
++) /* ISA remains */
2758 if (mxser_boards
[i
].info
!= NULL
)
2759 for (j
= 0; j
< mxser_boards
[i
].info
->nports
; j
++)
2760 tty_unregister_device(mxvar_sdriver
,
2761 mxser_boards
[i
].idx
+ j
);
2762 tty_unregister_driver(mxvar_sdriver
);
2763 put_tty_driver(mxvar_sdriver
);
2765 for (i
= 0; i
< MXSER_BOARDS
; i
++)
2766 if (mxser_boards
[i
].info
!= NULL
)
2767 mxser_release_res(&mxser_boards
[i
], NULL
, 1);
2769 pr_debug("Done.\n");
2772 module_init(mxser_module_init
);
2773 module_exit(mxser_module_exit
);