2 * mxser.c -- MOXA Smartio/Industio family multiport serial driver.
4 * Copyright (C) 1999-2006 Moxa Technologies (support@moxa.com).
5 * Copyright (C) 2006-2008 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/errno.h>
24 #include <linux/signal.h>
25 #include <linux/sched.h>
26 #include <linux/timer.h>
27 #include <linux/interrupt.h>
28 #include <linux/tty.h>
29 #include <linux/tty_flip.h>
30 #include <linux/serial.h>
31 #include <linux/serial_reg.h>
32 #include <linux/major.h>
33 #include <linux/string.h>
34 #include <linux/fcntl.h>
35 #include <linux/ptrace.h>
36 #include <linux/gfp.h>
37 #include <linux/ioport.h>
39 #include <linux/delay.h>
40 #include <linux/pci.h>
41 #include <linux/bitops.h>
43 #include <asm/system.h>
46 #include <asm/uaccess.h>
50 #define MXSER_VERSION "2.0.3" /* 1.11 */
51 #define MXSERMAJOR 174
52 #define MXSERCUMAJOR 175
54 #define MXSER_BOARDS 4 /* Max. boards */
55 #define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
56 #define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
57 #define MXSER_ISR_PASS_LIMIT 100
59 #define MXSER_ERR_IOADDR -1
60 #define MXSER_ERR_IRQ -2
61 #define MXSER_ERR_IRQ_CONFLIT -3
62 #define MXSER_ERR_VECTOR -4
64 /*CheckIsMoxaMust return value*/
65 #define MOXA_OTHER_UART 0x00
66 #define MOXA_MUST_MU150_HWID 0x01
67 #define MOXA_MUST_MU860_HWID 0x02
69 #define WAKEUP_CHARS 256
71 #define UART_MCR_AFE 0x20
72 #define UART_LSR_SPECIAL 0x1E
74 #define PCI_DEVICE_ID_CB108 0x1080
75 #define PCI_DEVICE_ID_CB114 0x1142
76 #define PCI_DEVICE_ID_CP114UL 0x1143
77 #define PCI_DEVICE_ID_CB134I 0x1341
78 #define PCI_DEVICE_ID_CP138U 0x1380
79 #define PCI_DEVICE_ID_POS104UL 0x1044
82 #define C168_ASIC_ID 1
83 #define C104_ASIC_ID 2
84 #define C102_ASIC_ID 0xB
85 #define CI132_ASIC_ID 4
86 #define CI134_ASIC_ID 3
87 #define CI104J_ASIC_ID 5
89 #define MXSER_HIGHBAUD 1
92 /* This is only for PCI */
102 } Gpci_uart_info
[] = {
103 {MOXA_OTHER_UART
, 16, 16, 16, 14, 14, 1, 921600L},
104 {MOXA_MUST_MU150_HWID
, 64, 64, 64, 48, 48, 16, 230400L},
105 {MOXA_MUST_MU860_HWID
, 128, 128, 128, 96, 96, 32, 921600L}
107 #define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info)
109 struct mxser_cardinfo
{
115 static const struct mxser_cardinfo mxser_cards
[] = {
116 /* 0*/ { "C168 series", 8, },
117 { "C104 series", 4, },
118 { "CI-104J series", 4, },
119 { "C168H/PCI series", 8, },
120 { "C104H/PCI series", 4, },
121 /* 5*/ { "C102 series", 4, MXSER_HAS2
}, /* C102-ISA */
122 { "CI-132 series", 4, MXSER_HAS2
},
123 { "CI-134 series", 4, },
124 { "CP-132 series", 2, },
125 { "CP-114 series", 4, },
126 /*10*/ { "CT-114 series", 4, },
127 { "CP-102 series", 2, MXSER_HIGHBAUD
},
128 { "CP-104U series", 4, },
129 { "CP-168U series", 8, },
130 { "CP-132U series", 2, },
131 /*15*/ { "CP-134U series", 4, },
132 { "CP-104JU series", 4, },
133 { "Moxa UC7000 Serial", 8, }, /* RC7000 */
134 { "CP-118U series", 8, },
135 { "CP-102UL series", 2, },
136 /*20*/ { "CP-102U series", 2, },
137 { "CP-118EL series", 8, },
138 { "CP-168EL series", 8, },
139 { "CP-104EL series", 4, },
140 { "CB-108 series", 8, },
141 /*25*/ { "CB-114 series", 4, },
142 { "CB-134I series", 4, },
143 { "CP-138U series", 8, },
144 { "POS-104UL series", 4, },
145 { "CP-114UL series", 4, }
148 /* driver_data correspond to the lines in the structure above
149 see also ISA probe function before you change something */
150 static struct pci_device_id mxser_pcibrds
[] = {
151 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_C168
), .driver_data
= 3 },
152 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_C104
), .driver_data
= 4 },
153 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP132
), .driver_data
= 8 },
154 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP114
), .driver_data
= 9 },
155 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CT114
), .driver_data
= 10 },
156 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP102
), .driver_data
= 11 },
157 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP104U
), .driver_data
= 12 },
158 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP168U
), .driver_data
= 13 },
159 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP132U
), .driver_data
= 14 },
160 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP134U
), .driver_data
= 15 },
161 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP104JU
),.driver_data
= 16 },
162 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_RC7000
), .driver_data
= 17 },
163 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP118U
), .driver_data
= 18 },
164 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP102UL
),.driver_data
= 19 },
165 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP102U
), .driver_data
= 20 },
166 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP118EL
),.driver_data
= 21 },
167 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP168EL
),.driver_data
= 22 },
168 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP104EL
),.driver_data
= 23 },
169 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_CB108
), .driver_data
= 24 },
170 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_CB114
), .driver_data
= 25 },
171 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_CB134I
), .driver_data
= 26 },
172 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_CP138U
), .driver_data
= 27 },
173 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_POS104UL
), .driver_data
= 28 },
174 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_CP114UL
), .driver_data
= 29 },
177 MODULE_DEVICE_TABLE(pci
, mxser_pcibrds
);
179 static int ioaddr
[MXSER_BOARDS
] = { 0, 0, 0, 0 };
180 static int ttymajor
= MXSERMAJOR
;
182 /* Variables for insmod */
184 MODULE_AUTHOR("Casper Yang");
185 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
186 module_param_array(ioaddr
, int, NULL
, 0);
187 module_param(ttymajor
, int, 0);
188 MODULE_LICENSE("GPL");
192 unsigned long rxcnt
[MXSER_PORTS
];
193 unsigned long txcnt
[MXSER_PORTS
];
200 unsigned long up_rxcnt
;
201 unsigned long up_txcnt
;
203 unsigned char hold_reason
;
206 struct mxser_mon_ext
{
207 unsigned long rx_cnt
[32];
208 unsigned long tx_cnt
[32];
209 unsigned long up_rxcnt
[32];
210 unsigned long up_txcnt
[32];
211 int modem_status
[32];
225 struct mxser_board
*board
;
226 struct tty_struct
*tty
;
228 unsigned long ioaddr
;
229 unsigned long opmode_ioaddr
;
233 int rx_trigger
; /* Rx fifo trigger level */
235 int baud_base
; /* max. speed */
236 int type
; /* UART type */
237 int flags
; /* defined in tty.h */
239 int x_char
; /* xon/xoff character */
240 int IER
; /* Interrupt Enable Register */
241 int MCR
; /* Modem control register */
243 unsigned char stop_rx
;
244 unsigned char ldisc_stop_rx
;
248 unsigned short closing_wait
;
249 unsigned char err_shadow
;
252 int count
; /* # of fd on device */
253 int blocked_open
; /* # of blocked opens */
254 struct async_icount icount
; /* kernel counters for 4 input interrupts */
257 int read_status_mask
;
258 int ignore_status_mask
;
260 unsigned char *xmit_buf
;
265 struct ktermios normal_termios
;
267 struct mxser_mon mon_data
;
270 wait_queue_head_t open_wait
;
271 wait_queue_head_t delta_msr_wait
;
277 const struct mxser_cardinfo
*info
;
278 unsigned long vector
;
279 unsigned long vector_mask
;
284 struct mxser_port ports
[MXSER_PORTS_PER_BOARD
];
287 struct mxser_mstatus
{
295 static struct mxser_mstatus GMStatus
[MXSER_PORTS
];
297 static int mxserBoardCAP
[MXSER_BOARDS
] = {
299 /* 0x180, 0x280, 0x200, 0x320 */
302 static struct mxser_board mxser_boards
[MXSER_BOARDS
];
303 static struct tty_driver
*mxvar_sdriver
;
304 static struct mxser_log mxvar_log
;
305 static int mxvar_diagflag
;
306 static unsigned char mxser_msr
[MXSER_PORTS
+ 1];
307 static struct mxser_mon_ext mon_data_ext
;
308 static int mxser_set_baud_method
[MXSER_PORTS
+ 1];
311 static int __devinit
CheckIsMoxaMust(unsigned long io
)
316 outb(0, io
+ UART_LCR
);
317 DISABLE_MOXA_MUST_ENCHANCE_MODE(io
);
318 oldmcr
= inb(io
+ UART_MCR
);
319 outb(0, io
+ UART_MCR
);
320 SET_MOXA_MUST_XON1_VALUE(io
, 0x11);
321 if ((hwid
= inb(io
+ UART_MCR
)) != 0) {
322 outb(oldmcr
, io
+ UART_MCR
);
323 return MOXA_OTHER_UART
;
326 GET_MOXA_MUST_HARDWARE_ID(io
, &hwid
);
327 for (i
= 1; i
< UART_INFO_NUM
; i
++) { /* 0 = OTHER_UART */
328 if (hwid
== Gpci_uart_info
[i
].type
)
331 return MOXA_OTHER_UART
;
335 static void process_txrx_fifo(struct mxser_port
*info
)
339 if ((info
->type
== PORT_16450
) || (info
->type
== PORT_8250
)) {
340 info
->rx_trigger
= 1;
341 info
->rx_high_water
= 1;
342 info
->rx_low_water
= 1;
343 info
->xmit_fifo_size
= 1;
345 for (i
= 0; i
< UART_INFO_NUM
; i
++)
346 if (info
->board
->chip_flag
== Gpci_uart_info
[i
].type
) {
347 info
->rx_trigger
= Gpci_uart_info
[i
].rx_trigger
;
348 info
->rx_low_water
= Gpci_uart_info
[i
].rx_low_water
;
349 info
->rx_high_water
= Gpci_uart_info
[i
].rx_high_water
;
350 info
->xmit_fifo_size
= Gpci_uart_info
[i
].xmit_fifo_size
;
355 static unsigned char mxser_get_msr(int baseaddr
, int mode
, int port
)
357 unsigned char status
= 0;
359 status
= inb(baseaddr
+ UART_MSR
);
361 mxser_msr
[port
] &= 0x0F;
362 mxser_msr
[port
] |= status
;
363 status
= mxser_msr
[port
];
370 static int mxser_block_til_ready(struct tty_struct
*tty
, struct file
*filp
,
371 struct mxser_port
*port
)
373 DECLARE_WAITQUEUE(wait
, current
);
379 * If non-blocking mode is set, or the port is not enabled,
380 * then make the check up front and then exit.
382 if ((filp
->f_flags
& O_NONBLOCK
) ||
383 test_bit(TTY_IO_ERROR
, &tty
->flags
)) {
384 port
->flags
|= ASYNC_NORMAL_ACTIVE
;
388 if (tty
->termios
->c_cflag
& CLOCAL
)
392 * Block waiting for the carrier detect and the line to become
393 * free (i.e., not in use by the callout). While we are in
394 * this loop, port->count is dropped by one, so that
395 * mxser_close() knows when to free things. We restore it upon
396 * exit, either normal or abnormal.
399 add_wait_queue(&port
->open_wait
, &wait
);
401 spin_lock_irqsave(&port
->slock
, flags
);
402 if (!tty_hung_up_p(filp
))
404 spin_unlock_irqrestore(&port
->slock
, flags
);
405 port
->blocked_open
++;
407 spin_lock_irqsave(&port
->slock
, flags
);
408 outb(inb(port
->ioaddr
+ UART_MCR
) |
409 UART_MCR_DTR
| UART_MCR_RTS
, port
->ioaddr
+ UART_MCR
);
410 spin_unlock_irqrestore(&port
->slock
, flags
);
411 set_current_state(TASK_INTERRUPTIBLE
);
412 if (tty_hung_up_p(filp
) || !(port
->flags
& ASYNC_INITIALIZED
)) {
413 if (port
->flags
& ASYNC_HUP_NOTIFY
)
416 retval
= -ERESTARTSYS
;
419 if (!(port
->flags
& ASYNC_CLOSING
) &&
421 (inb(port
->ioaddr
+ UART_MSR
) & UART_MSR_DCD
)))
423 if (signal_pending(current
)) {
424 retval
= -ERESTARTSYS
;
429 set_current_state(TASK_RUNNING
);
430 remove_wait_queue(&port
->open_wait
, &wait
);
431 if (!tty_hung_up_p(filp
))
433 port
->blocked_open
--;
436 port
->flags
|= ASYNC_NORMAL_ACTIVE
;
440 static int mxser_set_baud(struct mxser_port
*info
, long newspd
)
445 if (!info
->tty
|| !info
->tty
->termios
)
451 if (newspd
> info
->max_baud
)
455 quot
= 2 * info
->baud_base
/ 269;
456 tty_encode_baud_rate(info
->tty
, 134, 134);
458 quot
= info
->baud_base
/ newspd
;
461 baud
= info
->baud_base
/quot
;
462 tty_encode_baud_rate(info
->tty
, baud
, baud
);
467 info
->timeout
= ((info
->xmit_fifo_size
* HZ
* 10 * quot
) / info
->baud_base
);
468 info
->timeout
+= HZ
/ 50; /* Add .02 seconds of slop */
471 info
->MCR
|= UART_MCR_DTR
;
472 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
474 info
->MCR
&= ~UART_MCR_DTR
;
475 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
479 cval
= inb(info
->ioaddr
+ UART_LCR
);
481 outb(cval
| UART_LCR_DLAB
, info
->ioaddr
+ UART_LCR
); /* set DLAB */
483 outb(quot
& 0xff, info
->ioaddr
+ UART_DLL
); /* LS of divisor */
484 outb(quot
>> 8, info
->ioaddr
+ UART_DLM
); /* MS of divisor */
485 outb(cval
, info
->ioaddr
+ UART_LCR
); /* reset DLAB */
488 if (C_BAUD(info
->tty
) == BOTHER
) {
489 quot
= info
->baud_base
% newspd
;
491 if (quot
% newspd
> newspd
/ 2) {
497 SET_MOXA_MUST_ENUM_VALUE(info
->ioaddr
, quot
);
500 SET_MOXA_MUST_ENUM_VALUE(info
->ioaddr
, 0);
506 * This routine is called to set the UART divisor registers to match
507 * the specified baud rate for a serial port.
509 static int mxser_change_speed(struct mxser_port
*info
,
510 struct ktermios
*old_termios
)
512 unsigned cflag
, cval
, fcr
;
514 unsigned char status
;
516 if (!info
->tty
|| !info
->tty
->termios
)
518 cflag
= info
->tty
->termios
->c_cflag
;
522 if (mxser_set_baud_method
[info
->tty
->index
] == 0)
523 mxser_set_baud(info
, tty_get_baud_rate(info
->tty
));
525 /* byte size and parity */
526 switch (cflag
& CSIZE
) {
541 break; /* too keep GCC shut... */
546 cval
|= UART_LCR_PARITY
;
547 if (!(cflag
& PARODD
))
548 cval
|= UART_LCR_EPAR
;
550 cval
|= UART_LCR_SPAR
;
552 if ((info
->type
== PORT_8250
) || (info
->type
== PORT_16450
)) {
553 if (info
->board
->chip_flag
) {
554 fcr
= UART_FCR_ENABLE_FIFO
;
555 fcr
|= MOXA_MUST_FCR_GDA_MODE_ENABLE
;
556 SET_MOXA_MUST_FIFO_VALUE(info
);
560 fcr
= UART_FCR_ENABLE_FIFO
;
561 if (info
->board
->chip_flag
) {
562 fcr
|= MOXA_MUST_FCR_GDA_MODE_ENABLE
;
563 SET_MOXA_MUST_FIFO_VALUE(info
);
565 switch (info
->rx_trigger
) {
567 fcr
|= UART_FCR_TRIGGER_1
;
570 fcr
|= UART_FCR_TRIGGER_4
;
573 fcr
|= UART_FCR_TRIGGER_8
;
576 fcr
|= UART_FCR_TRIGGER_14
;
582 /* CTS flow control flag and modem status interrupts */
583 info
->IER
&= ~UART_IER_MSI
;
584 info
->MCR
&= ~UART_MCR_AFE
;
585 if (cflag
& CRTSCTS
) {
586 info
->flags
|= ASYNC_CTS_FLOW
;
587 info
->IER
|= UART_IER_MSI
;
588 if ((info
->type
== PORT_16550A
) || (info
->board
->chip_flag
)) {
589 info
->MCR
|= UART_MCR_AFE
;
591 status
= inb(info
->ioaddr
+ UART_MSR
);
592 if (info
->tty
->hw_stopped
) {
593 if (status
& UART_MSR_CTS
) {
594 info
->tty
->hw_stopped
= 0;
595 if (info
->type
!= PORT_16550A
&&
596 !info
->board
->chip_flag
) {
597 outb(info
->IER
& ~UART_IER_THRI
,
600 info
->IER
|= UART_IER_THRI
;
601 outb(info
->IER
, info
->ioaddr
+
604 tty_wakeup(info
->tty
);
607 if (!(status
& UART_MSR_CTS
)) {
608 info
->tty
->hw_stopped
= 1;
609 if ((info
->type
!= PORT_16550A
) &&
610 (!info
->board
->chip_flag
)) {
611 info
->IER
&= ~UART_IER_THRI
;
612 outb(info
->IER
, info
->ioaddr
+
619 info
->flags
&= ~ASYNC_CTS_FLOW
;
621 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
622 if (cflag
& CLOCAL
) {
623 info
->flags
&= ~ASYNC_CHECK_CD
;
625 info
->flags
|= ASYNC_CHECK_CD
;
626 info
->IER
|= UART_IER_MSI
;
628 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
631 * Set up parity check flag
633 info
->read_status_mask
= UART_LSR_OE
| UART_LSR_THRE
| UART_LSR_DR
;
634 if (I_INPCK(info
->tty
))
635 info
->read_status_mask
|= UART_LSR_FE
| UART_LSR_PE
;
636 if (I_BRKINT(info
->tty
) || I_PARMRK(info
->tty
))
637 info
->read_status_mask
|= UART_LSR_BI
;
639 info
->ignore_status_mask
= 0;
641 if (I_IGNBRK(info
->tty
)) {
642 info
->ignore_status_mask
|= UART_LSR_BI
;
643 info
->read_status_mask
|= UART_LSR_BI
;
645 * If we're ignore parity and break indicators, ignore
646 * overruns too. (For real raw support).
648 if (I_IGNPAR(info
->tty
)) {
649 info
->ignore_status_mask
|=
653 info
->read_status_mask
|=
659 if (info
->board
->chip_flag
) {
660 SET_MOXA_MUST_XON1_VALUE(info
->ioaddr
, START_CHAR(info
->tty
));
661 SET_MOXA_MUST_XOFF1_VALUE(info
->ioaddr
, STOP_CHAR(info
->tty
));
662 if (I_IXON(info
->tty
)) {
663 ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info
->ioaddr
);
665 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info
->ioaddr
);
667 if (I_IXOFF(info
->tty
)) {
668 ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info
->ioaddr
);
670 DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info
->ioaddr
);
675 outb(fcr
, info
->ioaddr
+ UART_FCR
); /* set fcr */
676 outb(cval
, info
->ioaddr
+ UART_LCR
);
681 static void mxser_check_modem_status(struct mxser_port
*port
, int status
)
683 /* update input line counters */
684 if (status
& UART_MSR_TERI
)
686 if (status
& UART_MSR_DDSR
)
688 if (status
& UART_MSR_DDCD
)
690 if (status
& UART_MSR_DCTS
)
692 port
->mon_data
.modem_status
= status
;
693 wake_up_interruptible(&port
->delta_msr_wait
);
695 if ((port
->flags
& ASYNC_CHECK_CD
) && (status
& UART_MSR_DDCD
)) {
696 if (status
& UART_MSR_DCD
)
697 wake_up_interruptible(&port
->open_wait
);
700 if (port
->flags
& ASYNC_CTS_FLOW
) {
701 if (port
->tty
->hw_stopped
) {
702 if (status
& UART_MSR_CTS
) {
703 port
->tty
->hw_stopped
= 0;
705 if ((port
->type
!= PORT_16550A
) &&
706 (!port
->board
->chip_flag
)) {
707 outb(port
->IER
& ~UART_IER_THRI
,
708 port
->ioaddr
+ UART_IER
);
709 port
->IER
|= UART_IER_THRI
;
710 outb(port
->IER
, port
->ioaddr
+
713 tty_wakeup(port
->tty
);
716 if (!(status
& UART_MSR_CTS
)) {
717 port
->tty
->hw_stopped
= 1;
718 if (port
->type
!= PORT_16550A
&&
719 !port
->board
->chip_flag
) {
720 port
->IER
&= ~UART_IER_THRI
;
721 outb(port
->IER
, port
->ioaddr
+
729 static int mxser_startup(struct mxser_port
*info
)
734 page
= __get_free_page(GFP_KERNEL
);
738 spin_lock_irqsave(&info
->slock
, flags
);
740 if (info
->flags
& ASYNC_INITIALIZED
) {
742 spin_unlock_irqrestore(&info
->slock
, flags
);
746 if (!info
->ioaddr
|| !info
->type
) {
748 set_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
750 spin_unlock_irqrestore(&info
->slock
, flags
);
756 info
->xmit_buf
= (unsigned char *) page
;
759 * Clear the FIFO buffers and disable them
760 * (they will be reenabled in mxser_change_speed())
762 if (info
->board
->chip_flag
)
763 outb((UART_FCR_CLEAR_RCVR
|
764 UART_FCR_CLEAR_XMIT
|
765 MOXA_MUST_FCR_GDA_MODE_ENABLE
), info
->ioaddr
+ UART_FCR
);
767 outb((UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
),
768 info
->ioaddr
+ UART_FCR
);
771 * At this point there's no way the LSR could still be 0xFF;
772 * if it is, then bail out, because there's likely no UART
775 if (inb(info
->ioaddr
+ UART_LSR
) == 0xff) {
776 spin_unlock_irqrestore(&info
->slock
, flags
);
777 if (capable(CAP_SYS_ADMIN
)) {
779 set_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
786 * Clear the interrupt registers.
788 (void) inb(info
->ioaddr
+ UART_LSR
);
789 (void) inb(info
->ioaddr
+ UART_RX
);
790 (void) inb(info
->ioaddr
+ UART_IIR
);
791 (void) inb(info
->ioaddr
+ UART_MSR
);
794 * Now, initialize the UART
796 outb(UART_LCR_WLEN8
, info
->ioaddr
+ UART_LCR
); /* reset DLAB */
797 info
->MCR
= UART_MCR_DTR
| UART_MCR_RTS
;
798 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
801 * Finally, enable interrupts
803 info
->IER
= UART_IER_MSI
| UART_IER_RLSI
| UART_IER_RDI
;
805 if (info
->board
->chip_flag
)
806 info
->IER
|= MOXA_MUST_IER_EGDAI
;
807 outb(info
->IER
, info
->ioaddr
+ UART_IER
); /* enable interrupts */
810 * And clear the interrupt registers again for luck.
812 (void) inb(info
->ioaddr
+ UART_LSR
);
813 (void) inb(info
->ioaddr
+ UART_RX
);
814 (void) inb(info
->ioaddr
+ UART_IIR
);
815 (void) inb(info
->ioaddr
+ UART_MSR
);
818 clear_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
819 info
->xmit_cnt
= info
->xmit_head
= info
->xmit_tail
= 0;
822 * and set the speed of the serial port
824 mxser_change_speed(info
, NULL
);
825 info
->flags
|= ASYNC_INITIALIZED
;
826 spin_unlock_irqrestore(&info
->slock
, flags
);
832 * This routine will shutdown a serial port; interrupts maybe disabled, and
833 * DTR is dropped if the hangup on close termio flag is on.
835 static void mxser_shutdown(struct mxser_port
*info
)
839 if (!(info
->flags
& ASYNC_INITIALIZED
))
842 spin_lock_irqsave(&info
->slock
, flags
);
845 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
846 * here so the queue might never be waken up
848 wake_up_interruptible(&info
->delta_msr_wait
);
851 * Free the IRQ, if necessary
853 if (info
->xmit_buf
) {
854 free_page((unsigned long) info
->xmit_buf
);
855 info
->xmit_buf
= NULL
;
859 outb(0x00, info
->ioaddr
+ UART_IER
);
861 if (!info
->tty
|| (info
->tty
->termios
->c_cflag
& HUPCL
))
862 info
->MCR
&= ~(UART_MCR_DTR
| UART_MCR_RTS
);
863 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
865 /* clear Rx/Tx FIFO's */
866 if (info
->board
->chip_flag
)
867 outb(UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
|
868 MOXA_MUST_FCR_GDA_MODE_ENABLE
,
869 info
->ioaddr
+ UART_FCR
);
871 outb(UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
,
872 info
->ioaddr
+ UART_FCR
);
874 /* read data port to reset things */
875 (void) inb(info
->ioaddr
+ UART_RX
);
878 set_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
880 info
->flags
&= ~ASYNC_INITIALIZED
;
882 if (info
->board
->chip_flag
)
883 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info
->ioaddr
);
885 spin_unlock_irqrestore(&info
->slock
, flags
);
889 * This routine is called whenever a serial port is opened. It
890 * enables interrupts for a serial port, linking in its async structure into
891 * the IRQ chain. It also performs the serial-specific
892 * initialization for the tty structure.
894 static int mxser_open(struct tty_struct
*tty
, struct file
*filp
)
896 struct mxser_port
*info
;
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
914 spin_lock_irqsave(&info
->slock
, flags
);
916 spin_unlock_irqrestore(&info
->slock
, flags
);
917 retval
= mxser_startup(info
);
921 retval
= mxser_block_til_ready(tty
, filp
, info
);
925 /* unmark here for very high baud rate (ex. 921600 bps) used */
926 tty
->low_latency
= 1;
931 * This routine is called when the serial port gets closed. First, we
932 * wait for the last remaining data to be sent. Then, we unlink its
933 * async structure from the interrupt chain if necessary, and we free
934 * that IRQ if nothing is left in the chain.
936 static void mxser_close(struct tty_struct
*tty
, struct file
*filp
)
938 struct mxser_port
*info
= tty
->driver_data
;
940 unsigned long timeout
;
943 if (tty
->index
== MXSER_PORTS
)
948 spin_lock_irqsave(&info
->slock
, flags
);
950 if (tty_hung_up_p(filp
)) {
951 spin_unlock_irqrestore(&info
->slock
, flags
);
954 if ((tty
->count
== 1) && (info
->count
!= 1)) {
956 * Uh, oh. tty->count is 1, which means that the tty
957 * structure will be freed. Info->count should always
958 * be one in these conditions. If it's greater than
959 * one, we've got real problems, since it means the
960 * serial port won't be shutdown.
962 printk(KERN_ERR
"mxser_close: bad serial port count; "
963 "tty->count is 1, info->count is %d\n", info
->count
);
966 if (--info
->count
< 0) {
967 printk(KERN_ERR
"mxser_close: bad serial port count for "
968 "ttys%d: %d\n", tty
->index
, info
->count
);
972 spin_unlock_irqrestore(&info
->slock
, flags
);
975 info
->flags
|= ASYNC_CLOSING
;
976 spin_unlock_irqrestore(&info
->slock
, flags
);
978 * Save the termios structure, since this port may have
979 * separate termios for callout and dialin.
981 if (info
->flags
& ASYNC_NORMAL_ACTIVE
)
982 info
->normal_termios
= *tty
->termios
;
984 * Now we wait for the transmit buffer to clear; and we notify
985 * the line discipline to only process XON/XOFF characters.
988 if (info
->closing_wait
!= ASYNC_CLOSING_WAIT_NONE
)
989 tty_wait_until_sent(tty
, info
->closing_wait
);
991 * At this point we stop accepting input. To do this, we
992 * disable the receive line status interrupts, and tell the
993 * interrupt driver to stop checking the data ready bit in the
994 * line status register.
996 info
->IER
&= ~UART_IER_RLSI
;
997 if (info
->board
->chip_flag
)
998 info
->IER
&= ~MOXA_MUST_RECV_ISR
;
1000 if (info
->flags
& ASYNC_INITIALIZED
) {
1001 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1003 * Before we drop DTR, make sure the UART transmitter
1004 * has completely drained; this is especially
1005 * important if there is a transmit FIFO!
1007 timeout
= jiffies
+ HZ
;
1008 while (!(inb(info
->ioaddr
+ UART_LSR
) & UART_LSR_TEMT
)) {
1009 schedule_timeout_interruptible(5);
1010 if (time_after(jiffies
, timeout
))
1014 mxser_shutdown(info
);
1016 if (tty
->driver
->flush_buffer
)
1017 tty
->driver
->flush_buffer(tty
);
1019 tty_ldisc_flush(tty
);
1024 if (info
->blocked_open
) {
1025 if (info
->close_delay
)
1026 schedule_timeout_interruptible(info
->close_delay
);
1027 wake_up_interruptible(&info
->open_wait
);
1030 info
->flags
&= ~(ASYNC_NORMAL_ACTIVE
| ASYNC_CLOSING
);
1033 static int mxser_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
1036 struct mxser_port
*info
= tty
->driver_data
;
1037 unsigned long flags
;
1039 if (!info
->xmit_buf
)
1043 c
= min_t(int, count
, min(SERIAL_XMIT_SIZE
- info
->xmit_cnt
- 1,
1044 SERIAL_XMIT_SIZE
- info
->xmit_head
));
1048 memcpy(info
->xmit_buf
+ info
->xmit_head
, buf
, c
);
1049 spin_lock_irqsave(&info
->slock
, flags
);
1050 info
->xmit_head
= (info
->xmit_head
+ c
) &
1051 (SERIAL_XMIT_SIZE
- 1);
1052 info
->xmit_cnt
+= c
;
1053 spin_unlock_irqrestore(&info
->slock
, flags
);
1060 if (info
->xmit_cnt
&& !tty
->stopped
) {
1061 if (!tty
->hw_stopped
||
1062 (info
->type
== PORT_16550A
) ||
1063 (info
->board
->chip_flag
)) {
1064 spin_lock_irqsave(&info
->slock
, flags
);
1065 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+
1067 info
->IER
|= UART_IER_THRI
;
1068 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1069 spin_unlock_irqrestore(&info
->slock
, flags
);
1075 static void mxser_put_char(struct tty_struct
*tty
, unsigned char ch
)
1077 struct mxser_port
*info
= tty
->driver_data
;
1078 unsigned long flags
;
1080 if (!info
->xmit_buf
)
1083 if (info
->xmit_cnt
>= SERIAL_XMIT_SIZE
- 1)
1086 spin_lock_irqsave(&info
->slock
, flags
);
1087 info
->xmit_buf
[info
->xmit_head
++] = ch
;
1088 info
->xmit_head
&= SERIAL_XMIT_SIZE
- 1;
1090 spin_unlock_irqrestore(&info
->slock
, flags
);
1091 if (!tty
->stopped
) {
1092 if (!tty
->hw_stopped
||
1093 (info
->type
== PORT_16550A
) ||
1094 info
->board
->chip_flag
) {
1095 spin_lock_irqsave(&info
->slock
, flags
);
1096 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
1097 info
->IER
|= UART_IER_THRI
;
1098 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1099 spin_unlock_irqrestore(&info
->slock
, flags
);
1105 static void mxser_flush_chars(struct tty_struct
*tty
)
1107 struct mxser_port
*info
= tty
->driver_data
;
1108 unsigned long flags
;
1110 if (info
->xmit_cnt
<= 0 ||
1114 (info
->type
!= PORT_16550A
) &&
1115 (!info
->board
->chip_flag
)
1119 spin_lock_irqsave(&info
->slock
, flags
);
1121 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
1122 info
->IER
|= UART_IER_THRI
;
1123 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1125 spin_unlock_irqrestore(&info
->slock
, flags
);
1128 static int mxser_write_room(struct tty_struct
*tty
)
1130 struct mxser_port
*info
= tty
->driver_data
;
1133 ret
= SERIAL_XMIT_SIZE
- info
->xmit_cnt
- 1;
1139 static int mxser_chars_in_buffer(struct tty_struct
*tty
)
1141 struct mxser_port
*info
= tty
->driver_data
;
1142 return info
->xmit_cnt
;
1145 static void mxser_flush_buffer(struct tty_struct
*tty
)
1147 struct mxser_port
*info
= tty
->driver_data
;
1149 unsigned long flags
;
1152 spin_lock_irqsave(&info
->slock
, flags
);
1153 info
->xmit_cnt
= info
->xmit_head
= info
->xmit_tail
= 0;
1155 fcr
= inb(info
->ioaddr
+ UART_FCR
);
1156 outb((fcr
| UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
),
1157 info
->ioaddr
+ UART_FCR
);
1158 outb(fcr
, info
->ioaddr
+ UART_FCR
);
1160 spin_unlock_irqrestore(&info
->slock
, flags
);
1166 * ------------------------------------------------------------
1167 * friends of mxser_ioctl()
1168 * ------------------------------------------------------------
1170 static int mxser_get_serial_info(struct mxser_port
*info
,
1171 struct serial_struct __user
*retinfo
)
1173 struct serial_struct tmp
= {
1175 .line
= info
->tty
->index
,
1176 .port
= info
->ioaddr
,
1177 .irq
= info
->board
->irq
,
1178 .flags
= info
->flags
,
1179 .baud_base
= info
->baud_base
,
1180 .close_delay
= info
->close_delay
,
1181 .closing_wait
= info
->closing_wait
,
1182 .custom_divisor
= info
->custom_divisor
,
1185 if (copy_to_user(retinfo
, &tmp
, sizeof(*retinfo
)))
1190 static int mxser_set_serial_info(struct mxser_port
*info
,
1191 struct serial_struct __user
*new_info
)
1193 struct serial_struct new_serial
;
1195 unsigned long sl_flags
;
1199 if (!new_info
|| !info
->ioaddr
)
1201 if (copy_from_user(&new_serial
, new_info
, sizeof(new_serial
)))
1204 if (new_serial
.irq
!= info
->board
->irq
||
1205 new_serial
.port
!= info
->ioaddr
)
1208 flags
= info
->flags
& ASYNC_SPD_MASK
;
1210 if (!capable(CAP_SYS_ADMIN
)) {
1211 if ((new_serial
.baud_base
!= info
->baud_base
) ||
1212 (new_serial
.close_delay
!= info
->close_delay
) ||
1213 ((new_serial
.flags
& ~ASYNC_USR_MASK
) != (info
->flags
& ~ASYNC_USR_MASK
)))
1215 info
->flags
= ((info
->flags
& ~ASYNC_USR_MASK
) |
1216 (new_serial
.flags
& ASYNC_USR_MASK
));
1219 * OK, past this point, all the error checking has been done.
1220 * At this point, we start making changes.....
1222 info
->flags
= ((info
->flags
& ~ASYNC_FLAGS
) |
1223 (new_serial
.flags
& ASYNC_FLAGS
));
1224 info
->close_delay
= new_serial
.close_delay
* HZ
/ 100;
1225 info
->closing_wait
= new_serial
.closing_wait
* HZ
/ 100;
1226 info
->tty
->low_latency
=
1227 (info
->flags
& ASYNC_LOW_LATENCY
) ? 1 : 0;
1228 info
->tty
->low_latency
= 0;
1229 if ((info
->flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_CUST
&&
1230 (new_serial
.baud_base
!= info
->baud_base
||
1231 new_serial
.custom_divisor
!=
1232 info
->custom_divisor
)) {
1233 baud
= new_serial
.baud_base
/ new_serial
.custom_divisor
;
1234 tty_encode_baud_rate(info
->tty
, baud
, baud
);
1238 info
->type
= new_serial
.type
;
1240 process_txrx_fifo(info
);
1242 if (info
->flags
& ASYNC_INITIALIZED
) {
1243 if (flags
!= (info
->flags
& ASYNC_SPD_MASK
)) {
1244 spin_lock_irqsave(&info
->slock
, sl_flags
);
1245 mxser_change_speed(info
, NULL
);
1246 spin_unlock_irqrestore(&info
->slock
, sl_flags
);
1249 retval
= mxser_startup(info
);
1255 * mxser_get_lsr_info - get line status register info
1257 * Purpose: Let user call ioctl() to get info when the UART physically
1258 * is emptied. On bus types like RS485, the transmitter must
1259 * release the bus after transmitting. This must be done when
1260 * the transmit shift register is empty, not be done when the
1261 * transmit holding register is empty. This functionality
1262 * allows an RS485 driver to be written in user space.
1264 static int mxser_get_lsr_info(struct mxser_port
*info
,
1265 unsigned int __user
*value
)
1267 unsigned char status
;
1268 unsigned int result
;
1269 unsigned long flags
;
1271 spin_lock_irqsave(&info
->slock
, flags
);
1272 status
= inb(info
->ioaddr
+ UART_LSR
);
1273 spin_unlock_irqrestore(&info
->slock
, flags
);
1274 result
= ((status
& UART_LSR_TEMT
) ? TIOCSER_TEMT
: 0);
1275 return put_user(result
, value
);
1279 * This routine sends a break character out the serial port.
1281 static void mxser_send_break(struct mxser_port
*info
, int duration
)
1283 unsigned long flags
;
1287 set_current_state(TASK_INTERRUPTIBLE
);
1288 spin_lock_irqsave(&info
->slock
, flags
);
1289 outb(inb(info
->ioaddr
+ UART_LCR
) | UART_LCR_SBC
,
1290 info
->ioaddr
+ UART_LCR
);
1291 spin_unlock_irqrestore(&info
->slock
, flags
);
1292 schedule_timeout(duration
);
1293 spin_lock_irqsave(&info
->slock
, flags
);
1294 outb(inb(info
->ioaddr
+ UART_LCR
) & ~UART_LCR_SBC
,
1295 info
->ioaddr
+ UART_LCR
);
1296 spin_unlock_irqrestore(&info
->slock
, flags
);
1299 static int mxser_tiocmget(struct tty_struct
*tty
, struct file
*file
)
1301 struct mxser_port
*info
= tty
->driver_data
;
1302 unsigned char control
, status
;
1303 unsigned long flags
;
1306 if (tty
->index
== MXSER_PORTS
)
1307 return -ENOIOCTLCMD
;
1308 if (test_bit(TTY_IO_ERROR
, &tty
->flags
))
1311 control
= info
->MCR
;
1313 spin_lock_irqsave(&info
->slock
, flags
);
1314 status
= inb(info
->ioaddr
+ UART_MSR
);
1315 if (status
& UART_MSR_ANY_DELTA
)
1316 mxser_check_modem_status(info
, status
);
1317 spin_unlock_irqrestore(&info
->slock
, flags
);
1318 return ((control
& UART_MCR_RTS
) ? TIOCM_RTS
: 0) |
1319 ((control
& UART_MCR_DTR
) ? TIOCM_DTR
: 0) |
1320 ((status
& UART_MSR_DCD
) ? TIOCM_CAR
: 0) |
1321 ((status
& UART_MSR_RI
) ? TIOCM_RNG
: 0) |
1322 ((status
& UART_MSR_DSR
) ? TIOCM_DSR
: 0) |
1323 ((status
& UART_MSR_CTS
) ? TIOCM_CTS
: 0);
1326 static int mxser_tiocmset(struct tty_struct
*tty
, struct file
*file
,
1327 unsigned int set
, unsigned int clear
)
1329 struct mxser_port
*info
= tty
->driver_data
;
1330 unsigned long flags
;
1333 if (tty
->index
== MXSER_PORTS
)
1334 return -ENOIOCTLCMD
;
1335 if (test_bit(TTY_IO_ERROR
, &tty
->flags
))
1338 spin_lock_irqsave(&info
->slock
, flags
);
1340 if (set
& TIOCM_RTS
)
1341 info
->MCR
|= UART_MCR_RTS
;
1342 if (set
& TIOCM_DTR
)
1343 info
->MCR
|= UART_MCR_DTR
;
1345 if (clear
& TIOCM_RTS
)
1346 info
->MCR
&= ~UART_MCR_RTS
;
1347 if (clear
& TIOCM_DTR
)
1348 info
->MCR
&= ~UART_MCR_DTR
;
1350 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
1351 spin_unlock_irqrestore(&info
->slock
, flags
);
1355 static int __init
mxser_program_mode(int port
)
1367 id
= inb(port
+ 1) & 0x1F;
1368 if ((id
!= C168_ASIC_ID
) &&
1369 (id
!= C104_ASIC_ID
) &&
1370 (id
!= C102_ASIC_ID
) &&
1371 (id
!= CI132_ASIC_ID
) &&
1372 (id
!= CI134_ASIC_ID
) &&
1373 (id
!= CI104J_ASIC_ID
))
1375 for (i
= 0, j
= 0; i
< 4; i
++) {
1379 } else if ((j
== 1) && (n
== 1)) {
1390 static void __init
mxser_normal_mode(int port
)
1394 outb(0xA5, port
+ 1);
1395 outb(0x80, port
+ 3);
1396 outb(12, port
+ 0); /* 9600 bps */
1398 outb(0x03, port
+ 3); /* 8 data bits */
1399 outb(0x13, port
+ 4); /* loop back mode */
1400 for (i
= 0; i
< 16; i
++) {
1402 if ((n
& 0x61) == 0x60)
1407 outb(0x00, port
+ 4);
1410 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
1411 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
1412 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
1413 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
1414 #define EN_CCMD 0x000 /* Chip's command register */
1415 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
1416 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
1417 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
1418 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
1419 #define EN0_DCFG 0x00E /* Data configuration reg WR */
1420 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
1421 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
1422 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
1423 static int __init
mxser_read_register(int port
, unsigned short *regs
)
1425 int i
, k
, value
, id
;
1428 id
= mxser_program_mode(port
);
1431 for (i
= 0; i
< 14; i
++) {
1432 k
= (i
& 0x3F) | 0x180;
1433 for (j
= 0x100; j
> 0; j
>>= 1) {
1434 outb(CHIP_CS
, port
);
1436 outb(CHIP_CS
| CHIP_DO
, port
);
1437 outb(CHIP_CS
| CHIP_DO
| CHIP_SK
, port
); /* A? bit of read */
1439 outb(CHIP_CS
, port
);
1440 outb(CHIP_CS
| CHIP_SK
, port
); /* A? bit of read */
1445 for (k
= 0, j
= 0x8000; k
< 16; k
++, j
>>= 1) {
1446 outb(CHIP_CS
, port
);
1447 outb(CHIP_CS
| CHIP_SK
, port
);
1448 if (inb(port
) & CHIP_DI
)
1454 mxser_normal_mode(port
);
1458 static int mxser_ioctl_special(unsigned int cmd
, void __user
*argp
)
1460 struct mxser_port
*port
;
1466 case MOXA_GET_MAJOR
:
1467 return put_user(ttymajor
, (int __user
*)argp
);
1469 case MOXA_CHKPORTENABLE
:
1472 for (i
= 0; i
< MXSER_BOARDS
; i
++)
1473 for (j
= 0; j
< MXSER_PORTS_PER_BOARD
; j
++)
1474 if (mxser_boards
[i
].ports
[j
].ioaddr
)
1477 return put_user(result
, (unsigned long __user
*)argp
);
1478 case MOXA_GETDATACOUNT
:
1480 if (copy_to_user(argp
, &mxvar_log
, sizeof(mxvar_log
)))
1484 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;
1523 if (copy_to_user(argp
, GMStatus
,
1524 sizeof(struct mxser_mstatus
) * MXSER_PORTS
))
1527 case MOXA_ASPP_MON_EXT
: {
1529 unsigned long opmode
;
1530 unsigned cflag
, iflag
;
1533 for (i
= 0; i
< MXSER_BOARDS
; i
++) {
1534 for (j
= 0; j
< MXSER_PORTS_PER_BOARD
; j
++) {
1535 port
= &mxser_boards
[i
].ports
[j
];
1539 status
= mxser_get_msr(port
->ioaddr
, 0, i
);
1541 if (status
& UART_MSR_TERI
)
1543 if (status
& UART_MSR_DDSR
)
1545 if (status
& UART_MSR_DDCD
)
1547 if (status
& UART_MSR_DCTS
)
1550 port
->mon_data
.modem_status
= status
;
1551 mon_data_ext
.rx_cnt
[i
] = port
->mon_data
.rxcnt
;
1552 mon_data_ext
.tx_cnt
[i
] = port
->mon_data
.txcnt
;
1553 mon_data_ext
.up_rxcnt
[i
] =
1554 port
->mon_data
.up_rxcnt
;
1555 mon_data_ext
.up_txcnt
[i
] =
1556 port
->mon_data
.up_txcnt
;
1557 mon_data_ext
.modem_status
[i
] =
1558 port
->mon_data
.modem_status
;
1559 mon_data_ext
.baudrate
[i
] =
1560 tty_get_baud_rate(port
->tty
);
1562 if (!port
->tty
|| !port
->tty
->termios
) {
1563 cflag
= port
->normal_termios
.c_cflag
;
1564 iflag
= port
->normal_termios
.c_iflag
;
1566 cflag
= port
->tty
->termios
->c_cflag
;
1567 iflag
= port
->tty
->termios
->c_iflag
;
1570 mon_data_ext
.databits
[i
] = cflag
& CSIZE
;
1572 mon_data_ext
.stopbits
[i
] = cflag
& CSTOPB
;
1574 mon_data_ext
.parity
[i
] =
1575 cflag
& (PARENB
| PARODD
| CMSPAR
);
1577 mon_data_ext
.flowctrl
[i
] = 0x00;
1579 if (cflag
& CRTSCTS
)
1580 mon_data_ext
.flowctrl
[i
] |= 0x03;
1582 if (iflag
& (IXON
| IXOFF
))
1583 mon_data_ext
.flowctrl
[i
] |= 0x0C;
1585 if (port
->type
== PORT_16550A
)
1586 mon_data_ext
.fifo
[i
] = 1;
1588 mon_data_ext
.fifo
[i
] = 0;
1592 opmode
= inb(port
->opmode_ioaddr
) >> shiftbit
;
1593 opmode
&= OP_MODE_MASK
;
1595 mon_data_ext
.iftype
[i
] = opmode
;
1600 if (copy_to_user(argp
, &mon_data_ext
,
1601 sizeof(mon_data_ext
)))
1606 return -ENOIOCTLCMD
;
1611 static int mxser_cflags_changed(struct mxser_port
*info
, unsigned long arg
,
1612 struct async_icount
*cprev
)
1614 struct async_icount cnow
;
1615 unsigned long flags
;
1618 spin_lock_irqsave(&info
->slock
, flags
);
1619 cnow
= info
->icount
; /* atomic copy */
1620 spin_unlock_irqrestore(&info
->slock
, flags
);
1622 ret
= ((arg
& TIOCM_RNG
) && (cnow
.rng
!= cprev
->rng
)) ||
1623 ((arg
& TIOCM_DSR
) && (cnow
.dsr
!= cprev
->dsr
)) ||
1624 ((arg
& TIOCM_CD
) && (cnow
.dcd
!= cprev
->dcd
)) ||
1625 ((arg
& TIOCM_CTS
) && (cnow
.cts
!= cprev
->cts
));
1632 static int mxser_ioctl(struct tty_struct
*tty
, struct file
*file
,
1633 unsigned int cmd
, unsigned long arg
)
1635 struct mxser_port
*info
= tty
->driver_data
;
1636 struct async_icount cnow
;
1637 struct serial_icounter_struct __user
*p_cuser
;
1638 unsigned long flags
;
1639 void __user
*argp
= (void __user
*)arg
;
1642 if (tty
->index
== MXSER_PORTS
)
1643 return mxser_ioctl_special(cmd
, argp
);
1645 if (cmd
== MOXA_SET_OP_MODE
|| cmd
== MOXA_GET_OP_MODE
) {
1647 unsigned long opmode
;
1648 static unsigned char ModeMask
[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1650 unsigned char val
, mask
;
1653 if (cmd
== MOXA_SET_OP_MODE
) {
1654 if (get_user(opmode
, (int __user
*) argp
))
1656 if (opmode
!= RS232_MODE
&&
1657 opmode
!= RS485_2WIRE_MODE
&&
1658 opmode
!= RS422_MODE
&&
1659 opmode
!= RS485_4WIRE_MODE
)
1664 val
= inb(info
->opmode_ioaddr
);
1666 val
|= (opmode
<< shiftbit
);
1667 outb(val
, info
->opmode_ioaddr
);
1672 opmode
= inb(info
->opmode_ioaddr
) >> shiftbit
;
1673 opmode
&= OP_MODE_MASK
;
1675 if (put_user(opmode
, (int __user
*)argp
))
1681 if (cmd
!= TIOCGSERIAL
&& cmd
!= TIOCMIWAIT
&& cmd
!= TIOCGICOUNT
&&
1682 test_bit(TTY_IO_ERROR
, &tty
->flags
))
1686 case TCSBRK
: /* SVID version: non-zero arg --> no break */
1687 retval
= tty_check_change(tty
);
1690 tty_wait_until_sent(tty
, 0);
1692 mxser_send_break(info
, HZ
/ 4); /* 1/4 second */
1694 case TCSBRKP
: /* support for POSIX tcsendbreak() */
1695 retval
= tty_check_change(tty
);
1698 tty_wait_until_sent(tty
, 0);
1699 mxser_send_break(info
, arg
? arg
* (HZ
/ 10) : HZ
/ 4);
1703 retval
= mxser_get_serial_info(info
, argp
);
1708 retval
= mxser_set_serial_info(info
, argp
);
1711 case TIOCSERGETLSR
: /* Get line status register */
1712 return mxser_get_lsr_info(info
, argp
);
1714 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1715 * - mask passed in arg for lines of interest
1716 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1717 * Caller should use TIOCGICOUNT to see which one it was
1720 spin_lock_irqsave(&info
->slock
, flags
);
1721 cnow
= info
->icount
; /* note the counters on entry */
1722 spin_unlock_irqrestore(&info
->slock
, flags
);
1724 return wait_event_interruptible(info
->delta_msr_wait
,
1725 mxser_cflags_changed(info
, arg
, &cnow
));
1727 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1728 * Return: write counters to the user passed counter struct
1729 * NB: both 1->0 and 0->1 transitions are counted except for
1730 * RI where only 0->1 is counted.
1733 spin_lock_irqsave(&info
->slock
, flags
);
1734 cnow
= info
->icount
;
1735 spin_unlock_irqrestore(&info
->slock
, flags
);
1737 if (put_user(cnow
.frame
, &p_cuser
->frame
))
1739 if (put_user(cnow
.brk
, &p_cuser
->brk
))
1741 if (put_user(cnow
.overrun
, &p_cuser
->overrun
))
1743 if (put_user(cnow
.buf_overrun
, &p_cuser
->buf_overrun
))
1745 if (put_user(cnow
.parity
, &p_cuser
->parity
))
1747 if (put_user(cnow
.rx
, &p_cuser
->rx
))
1749 if (put_user(cnow
.tx
, &p_cuser
->tx
))
1751 put_user(cnow
.cts
, &p_cuser
->cts
);
1752 put_user(cnow
.dsr
, &p_cuser
->dsr
);
1753 put_user(cnow
.rng
, &p_cuser
->rng
);
1754 put_user(cnow
.dcd
, &p_cuser
->dcd
);
1756 case MOXA_HighSpeedOn
:
1757 return put_user(info
->baud_base
!= 115200 ? 1 : 0, (int __user
*)argp
);
1758 case MOXA_SDS_RSTICOUNTER
:
1760 info
->mon_data
.rxcnt
= 0;
1761 info
->mon_data
.txcnt
= 0;
1765 case MOXA_ASPP_OQUEUE
:{
1769 len
= mxser_chars_in_buffer(tty
);
1770 lsr
= inb(info
->ioaddr
+ UART_LSR
) & UART_LSR_TEMT
;
1771 len
+= (lsr
? 0 : 1);
1774 return put_user(len
, (int __user
*)argp
);
1776 case MOXA_ASPP_MON
: {
1780 status
= mxser_get_msr(info
->ioaddr
, 1, tty
->index
);
1781 mxser_check_modem_status(info
, status
);
1783 mcr
= inb(info
->ioaddr
+ UART_MCR
);
1784 if (mcr
& MOXA_MUST_MCR_XON_FLAG
)
1785 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_XOFFHOLD
;
1787 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_XOFFHOLD
;
1789 if (mcr
& MOXA_MUST_MCR_TX_XON
)
1790 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_XOFFXENT
;
1792 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_XOFFXENT
;
1794 if (info
->tty
->hw_stopped
)
1795 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_CTSHOLD
;
1797 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_CTSHOLD
;
1799 if (copy_to_user(argp
, &info
->mon_data
,
1800 sizeof(struct mxser_mon
)))
1805 case MOXA_ASPP_LSTATUS
: {
1806 if (put_user(info
->err_shadow
, (unsigned char __user
*)argp
))
1809 info
->err_shadow
= 0;
1812 case MOXA_SET_BAUD_METHOD
: {
1815 if (get_user(method
, (int __user
*)argp
))
1817 mxser_set_baud_method
[tty
->index
] = method
;
1818 return put_user(method
, (int __user
*)argp
);
1821 return -ENOIOCTLCMD
;
1826 static void mxser_stoprx(struct tty_struct
*tty
)
1828 struct mxser_port
*info
= tty
->driver_data
;
1830 info
->ldisc_stop_rx
= 1;
1832 if (info
->board
->chip_flag
) {
1833 info
->IER
&= ~MOXA_MUST_RECV_ISR
;
1834 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1836 info
->x_char
= STOP_CHAR(tty
);
1837 outb(0, info
->ioaddr
+ UART_IER
);
1838 info
->IER
|= UART_IER_THRI
;
1839 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1843 if (info
->tty
->termios
->c_cflag
& CRTSCTS
) {
1844 info
->MCR
&= ~UART_MCR_RTS
;
1845 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
1850 * This routine is called by the upper-layer tty layer to signal that
1851 * incoming characters should be throttled.
1853 static void mxser_throttle(struct tty_struct
*tty
)
1858 static void mxser_unthrottle(struct tty_struct
*tty
)
1860 struct mxser_port
*info
= tty
->driver_data
;
1863 info
->ldisc_stop_rx
= 0;
1868 if (info
->board
->chip_flag
) {
1869 info
->IER
|= MOXA_MUST_RECV_ISR
;
1870 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1872 info
->x_char
= START_CHAR(tty
);
1873 outb(0, info
->ioaddr
+ UART_IER
);
1874 info
->IER
|= UART_IER_THRI
;
1875 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1880 if (info
->tty
->termios
->c_cflag
& CRTSCTS
) {
1881 info
->MCR
|= UART_MCR_RTS
;
1882 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
1887 * mxser_stop() and mxser_start()
1889 * This routines are called before setting or resetting tty->stopped.
1890 * They enable or disable transmitter interrupts, as necessary.
1892 static void mxser_stop(struct tty_struct
*tty
)
1894 struct mxser_port
*info
= tty
->driver_data
;
1895 unsigned long flags
;
1897 spin_lock_irqsave(&info
->slock
, flags
);
1898 if (info
->IER
& UART_IER_THRI
) {
1899 info
->IER
&= ~UART_IER_THRI
;
1900 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1902 spin_unlock_irqrestore(&info
->slock
, flags
);
1905 static void mxser_start(struct tty_struct
*tty
)
1907 struct mxser_port
*info
= tty
->driver_data
;
1908 unsigned long flags
;
1910 spin_lock_irqsave(&info
->slock
, flags
);
1911 if (info
->xmit_cnt
&& info
->xmit_buf
) {
1912 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
1913 info
->IER
|= UART_IER_THRI
;
1914 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1916 spin_unlock_irqrestore(&info
->slock
, flags
);
1919 static void mxser_set_termios(struct tty_struct
*tty
, struct ktermios
*old_termios
)
1921 struct mxser_port
*info
= tty
->driver_data
;
1922 unsigned long flags
;
1924 spin_lock_irqsave(&info
->slock
, flags
);
1925 mxser_change_speed(info
, old_termios
);
1926 spin_unlock_irqrestore(&info
->slock
, flags
);
1928 if ((old_termios
->c_cflag
& CRTSCTS
) &&
1929 !(tty
->termios
->c_cflag
& CRTSCTS
)) {
1930 tty
->hw_stopped
= 0;
1934 /* Handle sw stopped */
1935 if ((old_termios
->c_iflag
& IXON
) &&
1936 !(tty
->termios
->c_iflag
& IXON
)) {
1939 if (info
->board
->chip_flag
) {
1940 spin_lock_irqsave(&info
->slock
, flags
);
1941 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info
->ioaddr
);
1942 spin_unlock_irqrestore(&info
->slock
, flags
);
1950 * mxser_wait_until_sent() --- wait until the transmitter is empty
1952 static void mxser_wait_until_sent(struct tty_struct
*tty
, int timeout
)
1954 struct mxser_port
*info
= tty
->driver_data
;
1955 unsigned long orig_jiffies
, char_time
;
1958 if (info
->type
== PORT_UNKNOWN
)
1961 if (info
->xmit_fifo_size
== 0)
1962 return; /* Just in case.... */
1964 orig_jiffies
= jiffies
;
1966 * Set the check interval to be 1/5 of the estimated time to
1967 * send a single character, and make it at least 1. The check
1968 * interval should also be less than the timeout.
1970 * Note: we have to use pretty tight timings here to satisfy
1973 char_time
= (info
->timeout
- HZ
/ 50) / info
->xmit_fifo_size
;
1974 char_time
= char_time
/ 5;
1977 if (timeout
&& timeout
< char_time
)
1978 char_time
= timeout
;
1980 * If the transmitter hasn't cleared in twice the approximate
1981 * amount of time to send the entire FIFO, it probably won't
1982 * ever clear. This assumes the UART isn't doing flow
1983 * control, which is currently the case. Hence, if it ever
1984 * takes longer than info->timeout, this is probably due to a
1985 * UART bug of some kind. So, we clamp the timeout parameter at
1988 if (!timeout
|| timeout
> 2 * info
->timeout
)
1989 timeout
= 2 * info
->timeout
;
1990 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1991 printk(KERN_DEBUG
"In rs_wait_until_sent(%d) check=%lu...",
1992 timeout
, char_time
);
1993 printk("jiff=%lu...", jiffies
);
1995 while (!((lsr
= inb(info
->ioaddr
+ UART_LSR
)) & UART_LSR_TEMT
)) {
1996 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1997 printk("lsr = %d (jiff=%lu)...", lsr
, jiffies
);
1999 schedule_timeout_interruptible(char_time
);
2000 if (signal_pending(current
))
2002 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2005 set_current_state(TASK_RUNNING
);
2007 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2008 printk("lsr = %d (jiff=%lu)...done\n", lsr
, jiffies
);
2013 * This routine is called by tty_hangup() when a hangup is signaled.
2015 static void mxser_hangup(struct tty_struct
*tty
)
2017 struct mxser_port
*info
= tty
->driver_data
;
2019 mxser_flush_buffer(tty
);
2020 mxser_shutdown(info
);
2023 info
->flags
&= ~ASYNC_NORMAL_ACTIVE
;
2025 wake_up_interruptible(&info
->open_wait
);
2029 * mxser_rs_break() --- routine which turns the break handling on or off
2031 static void mxser_rs_break(struct tty_struct
*tty
, int break_state
)
2033 struct mxser_port
*info
= tty
->driver_data
;
2034 unsigned long flags
;
2036 spin_lock_irqsave(&info
->slock
, flags
);
2037 if (break_state
== -1)
2038 outb(inb(info
->ioaddr
+ UART_LCR
) | UART_LCR_SBC
,
2039 info
->ioaddr
+ UART_LCR
);
2041 outb(inb(info
->ioaddr
+ UART_LCR
) & ~UART_LCR_SBC
,
2042 info
->ioaddr
+ UART_LCR
);
2043 spin_unlock_irqrestore(&info
->slock
, flags
);
2046 static void mxser_receive_chars(struct mxser_port
*port
, int *status
)
2048 struct tty_struct
*tty
= port
->tty
;
2049 unsigned char ch
, gdl
;
2055 recv_room
= tty
->receive_room
;
2056 if ((recv_room
== 0) && (!port
->ldisc_stop_rx
))
2059 if (port
->board
->chip_flag
!= MOXA_OTHER_UART
) {
2061 if (*status
& UART_LSR_SPECIAL
)
2063 if (port
->board
->chip_flag
== MOXA_MUST_MU860_HWID
&&
2064 (*status
& MOXA_MUST_LSR_RERR
))
2066 if (*status
& MOXA_MUST_LSR_RERR
)
2069 gdl
= inb(port
->ioaddr
+ MOXA_MUST_GDL_REGISTER
);
2071 if (port
->board
->chip_flag
== MOXA_MUST_MU150_HWID
)
2072 gdl
&= MOXA_MUST_GDL_MASK
;
2073 if (gdl
>= recv_room
) {
2074 if (!port
->ldisc_stop_rx
)
2078 ch
= inb(port
->ioaddr
+ UART_RX
);
2079 tty_insert_flip_char(tty
, ch
, 0);
2090 ch
= inb(port
->ioaddr
+ UART_RX
);
2091 if (port
->board
->chip_flag
&& (*status
& UART_LSR_OE
))
2092 outb(0x23, port
->ioaddr
+ UART_FCR
);
2093 *status
&= port
->read_status_mask
;
2094 if (*status
& port
->ignore_status_mask
) {
2095 if (++ignored
> 100)
2099 if (*status
& UART_LSR_SPECIAL
) {
2100 if (*status
& UART_LSR_BI
) {
2104 if (port
->flags
& ASYNC_SAK
)
2106 } else if (*status
& UART_LSR_PE
) {
2108 port
->icount
.parity
++;
2109 } else if (*status
& UART_LSR_FE
) {
2111 port
->icount
.frame
++;
2112 } else if (*status
& UART_LSR_OE
) {
2114 port
->icount
.overrun
++;
2118 tty_insert_flip_char(tty
, ch
, flag
);
2120 if (cnt
>= recv_room
) {
2121 if (!port
->ldisc_stop_rx
)
2128 if (port
->board
->chip_flag
)
2131 *status
= inb(port
->ioaddr
+ UART_LSR
);
2132 } while (*status
& UART_LSR_DR
);
2135 mxvar_log
.rxcnt
[port
->tty
->index
] += cnt
;
2136 port
->mon_data
.rxcnt
+= cnt
;
2137 port
->mon_data
.up_rxcnt
+= cnt
;
2140 * We are called from an interrupt context with &port->slock
2141 * being held. Drop it temporarily in order to prevent
2142 * recursive locking.
2144 spin_unlock(&port
->slock
);
2145 tty_flip_buffer_push(tty
);
2146 spin_lock(&port
->slock
);
2149 static void mxser_transmit_chars(struct mxser_port
*port
)
2154 outb(port
->x_char
, port
->ioaddr
+ UART_TX
);
2156 mxvar_log
.txcnt
[port
->tty
->index
]++;
2157 port
->mon_data
.txcnt
++;
2158 port
->mon_data
.up_txcnt
++;
2163 if (port
->xmit_buf
== NULL
)
2166 if ((port
->xmit_cnt
<= 0) || port
->tty
->stopped
||
2167 (port
->tty
->hw_stopped
&&
2168 (port
->type
!= PORT_16550A
) &&
2169 (!port
->board
->chip_flag
))) {
2170 port
->IER
&= ~UART_IER_THRI
;
2171 outb(port
->IER
, port
->ioaddr
+ UART_IER
);
2175 cnt
= port
->xmit_cnt
;
2176 count
= port
->xmit_fifo_size
;
2178 outb(port
->xmit_buf
[port
->xmit_tail
++],
2179 port
->ioaddr
+ UART_TX
);
2180 port
->xmit_tail
= port
->xmit_tail
& (SERIAL_XMIT_SIZE
- 1);
2181 if (--port
->xmit_cnt
<= 0)
2183 } while (--count
> 0);
2184 mxvar_log
.txcnt
[port
->tty
->index
] += (cnt
- port
->xmit_cnt
);
2186 port
->mon_data
.txcnt
+= (cnt
- port
->xmit_cnt
);
2187 port
->mon_data
.up_txcnt
+= (cnt
- port
->xmit_cnt
);
2188 port
->icount
.tx
+= (cnt
- port
->xmit_cnt
);
2190 if (port
->xmit_cnt
< WAKEUP_CHARS
)
2191 tty_wakeup(port
->tty
);
2193 if (port
->xmit_cnt
<= 0) {
2194 port
->IER
&= ~UART_IER_THRI
;
2195 outb(port
->IER
, port
->ioaddr
+ UART_IER
);
2200 * This is the serial driver's generic interrupt routine
2202 static irqreturn_t
mxser_interrupt(int irq
, void *dev_id
)
2205 struct mxser_board
*brd
= NULL
;
2206 struct mxser_port
*port
;
2207 int max
, irqbits
, bits
, msr
;
2208 unsigned int int_cnt
, pass_counter
= 0;
2209 int handled
= IRQ_NONE
;
2211 for (i
= 0; i
< MXSER_BOARDS
; i
++)
2212 if (dev_id
== &mxser_boards
[i
]) {
2217 if (i
== MXSER_BOARDS
)
2221 max
= brd
->info
->nports
;
2222 while (pass_counter
++ < MXSER_ISR_PASS_LIMIT
) {
2223 irqbits
= inb(brd
->vector
) & brd
->vector_mask
;
2224 if (irqbits
== brd
->vector_mask
)
2227 handled
= IRQ_HANDLED
;
2228 for (i
= 0, bits
= 1; i
< max
; i
++, irqbits
|= bits
, bits
<<= 1) {
2229 if (irqbits
== brd
->vector_mask
)
2233 port
= &brd
->ports
[i
];
2236 spin_lock(&port
->slock
);
2238 iir
= inb(port
->ioaddr
+ UART_IIR
);
2239 if (iir
& UART_IIR_NO_INT
)
2241 iir
&= MOXA_MUST_IIR_MASK
;
2243 (port
->flags
& ASYNC_CLOSING
) ||
2245 ASYNC_INITIALIZED
)) {
2246 status
= inb(port
->ioaddr
+ UART_LSR
);
2247 outb(0x27, port
->ioaddr
+ UART_FCR
);
2248 inb(port
->ioaddr
+ UART_MSR
);
2252 status
= inb(port
->ioaddr
+ UART_LSR
);
2254 if (status
& UART_LSR_PE
)
2255 port
->err_shadow
|= NPPI_NOTIFY_PARITY
;
2256 if (status
& UART_LSR_FE
)
2257 port
->err_shadow
|= NPPI_NOTIFY_FRAMING
;
2258 if (status
& UART_LSR_OE
)
2260 NPPI_NOTIFY_HW_OVERRUN
;
2261 if (status
& UART_LSR_BI
)
2262 port
->err_shadow
|= NPPI_NOTIFY_BREAK
;
2264 if (port
->board
->chip_flag
) {
2265 if (iir
== MOXA_MUST_IIR_GDA
||
2266 iir
== MOXA_MUST_IIR_RDA
||
2267 iir
== MOXA_MUST_IIR_RTO
||
2268 iir
== MOXA_MUST_IIR_LSR
)
2269 mxser_receive_chars(port
,
2273 status
&= port
->read_status_mask
;
2274 if (status
& UART_LSR_DR
)
2275 mxser_receive_chars(port
,
2278 msr
= inb(port
->ioaddr
+ UART_MSR
);
2279 if (msr
& UART_MSR_ANY_DELTA
)
2280 mxser_check_modem_status(port
, msr
);
2282 if (port
->board
->chip_flag
) {
2283 if (iir
== 0x02 && (status
&
2285 mxser_transmit_chars(port
);
2287 if (status
& UART_LSR_THRE
)
2288 mxser_transmit_chars(port
);
2290 } while (int_cnt
++ < MXSER_ISR_PASS_LIMIT
);
2291 spin_unlock(&port
->slock
);
2299 static const struct tty_operations mxser_ops
= {
2301 .close
= mxser_close
,
2302 .write
= mxser_write
,
2303 .put_char
= mxser_put_char
,
2304 .flush_chars
= mxser_flush_chars
,
2305 .write_room
= mxser_write_room
,
2306 .chars_in_buffer
= mxser_chars_in_buffer
,
2307 .flush_buffer
= mxser_flush_buffer
,
2308 .ioctl
= mxser_ioctl
,
2309 .throttle
= mxser_throttle
,
2310 .unthrottle
= mxser_unthrottle
,
2311 .set_termios
= mxser_set_termios
,
2313 .start
= mxser_start
,
2314 .hangup
= mxser_hangup
,
2315 .break_ctl
= mxser_rs_break
,
2316 .wait_until_sent
= mxser_wait_until_sent
,
2317 .tiocmget
= mxser_tiocmget
,
2318 .tiocmset
= mxser_tiocmset
,
2322 * The MOXA Smartio/Industio serial driver boot-time initialization code!
2325 static void mxser_release_res(struct mxser_board
*brd
, struct pci_dev
*pdev
,
2329 free_irq(brd
->irq
, brd
);
2330 if (pdev
!= NULL
) { /* PCI */
2332 pci_release_region(pdev
, 2);
2333 pci_release_region(pdev
, 3);
2336 release_region(brd
->ports
[0].ioaddr
, 8 * brd
->info
->nports
);
2337 release_region(brd
->vector
, 1);
2341 static int __devinit
mxser_initbrd(struct mxser_board
*brd
,
2342 struct pci_dev
*pdev
)
2344 struct mxser_port
*info
;
2348 printk(KERN_INFO
"max. baud rate = %d bps.\n", brd
->ports
[0].max_baud
);
2350 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2351 info
= &brd
->ports
[i
];
2354 info
->ldisc_stop_rx
= 0;
2356 /* Enhance mode enabled here */
2357 if (brd
->chip_flag
!= MOXA_OTHER_UART
)
2358 ENABLE_MOXA_MUST_ENCHANCE_MODE(info
->ioaddr
);
2360 info
->flags
= ASYNC_SHARE_IRQ
;
2361 info
->type
= brd
->uart_type
;
2363 process_txrx_fifo(info
);
2365 info
->custom_divisor
= info
->baud_base
* 16;
2366 info
->close_delay
= 5 * HZ
/ 10;
2367 info
->closing_wait
= 30 * HZ
;
2368 info
->normal_termios
= mxvar_sdriver
->init_termios
;
2369 init_waitqueue_head(&info
->open_wait
);
2370 init_waitqueue_head(&info
->delta_msr_wait
);
2371 memset(&info
->mon_data
, 0, sizeof(struct mxser_mon
));
2372 info
->err_shadow
= 0;
2373 spin_lock_init(&info
->slock
);
2375 /* before set INT ISR, disable all int */
2376 outb(inb(info
->ioaddr
+ UART_IER
) & 0xf0,
2377 info
->ioaddr
+ UART_IER
);
2380 retval
= request_irq(brd
->irq
, mxser_interrupt
, IRQF_SHARED
, "mxser",
2383 printk(KERN_ERR
"Board %s: Request irq failed, IRQ (%d) may "
2384 "conflict with another device.\n",
2385 brd
->info
->name
, brd
->irq
);
2386 /* We hold resources, we need to release them. */
2387 mxser_release_res(brd
, pdev
, 0);
2392 static int __init
mxser_get_ISA_conf(int cap
, struct mxser_board
*brd
)
2395 unsigned short regs
[16], irq
;
2396 unsigned char scratch
, scratch2
;
2398 brd
->chip_flag
= MOXA_OTHER_UART
;
2400 id
= mxser_read_register(cap
, regs
);
2403 brd
->info
= &mxser_cards
[0];
2406 brd
->info
= &mxser_cards
[1];
2408 case CI104J_ASIC_ID
:
2409 brd
->info
= &mxser_cards
[2];
2412 brd
->info
= &mxser_cards
[5];
2415 brd
->info
= &mxser_cards
[6];
2418 brd
->info
= &mxser_cards
[7];
2425 /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2426 Flag-hack checks if configuration should be read as 2-port here. */
2427 if (brd
->info
->nports
== 2 || (brd
->info
->flags
& MXSER_HAS2
)) {
2428 irq
= regs
[9] & 0xF000;
2429 irq
= irq
| (irq
>> 4);
2430 if (irq
!= (regs
[9] & 0xFF00))
2431 return MXSER_ERR_IRQ_CONFLIT
;
2432 } else if (brd
->info
->nports
== 4) {
2433 irq
= regs
[9] & 0xF000;
2434 irq
= irq
| (irq
>> 4);
2435 irq
= irq
| (irq
>> 8);
2437 return MXSER_ERR_IRQ_CONFLIT
;
2438 } else if (brd
->info
->nports
== 8) {
2439 irq
= regs
[9] & 0xF000;
2440 irq
= irq
| (irq
>> 4);
2441 irq
= irq
| (irq
>> 8);
2442 if ((irq
!= regs
[9]) || (irq
!= regs
[10]))
2443 return MXSER_ERR_IRQ_CONFLIT
;
2447 return MXSER_ERR_IRQ
;
2448 brd
->irq
= ((int)(irq
& 0xF000) >> 12);
2449 for (i
= 0; i
< 8; i
++)
2450 brd
->ports
[i
].ioaddr
= (int) regs
[i
+ 1] & 0xFFF8;
2451 if ((regs
[12] & 0x80) == 0)
2452 return MXSER_ERR_VECTOR
;
2453 brd
->vector
= (int)regs
[11]; /* interrupt vector */
2455 brd
->vector_mask
= 0x00FF;
2457 brd
->vector_mask
= 0x000F;
2458 for (i
= 7, bits
= 0x0100; i
>= 0; i
--, bits
<<= 1) {
2459 if (regs
[12] & bits
) {
2460 brd
->ports
[i
].baud_base
= 921600;
2461 brd
->ports
[i
].max_baud
= 921600;
2463 brd
->ports
[i
].baud_base
= 115200;
2464 brd
->ports
[i
].max_baud
= 115200;
2467 scratch2
= inb(cap
+ UART_LCR
) & (~UART_LCR_DLAB
);
2468 outb(scratch2
| UART_LCR_DLAB
, cap
+ UART_LCR
);
2469 outb(0, cap
+ UART_EFR
); /* EFR is the same as FCR */
2470 outb(scratch2
, cap
+ UART_LCR
);
2471 outb(UART_FCR_ENABLE_FIFO
, cap
+ UART_FCR
);
2472 scratch
= inb(cap
+ UART_IIR
);
2475 brd
->uart_type
= PORT_16550A
;
2477 brd
->uart_type
= PORT_16450
;
2478 if (!request_region(brd
->ports
[0].ioaddr
, 8 * brd
->info
->nports
,
2480 return MXSER_ERR_IOADDR
;
2481 if (!request_region(brd
->vector
, 1, "mxser(vector)")) {
2482 release_region(brd
->ports
[0].ioaddr
, 8 * brd
->info
->nports
);
2483 return MXSER_ERR_VECTOR
;
2485 return brd
->info
->nports
;
2488 static int __devinit
mxser_probe(struct pci_dev
*pdev
,
2489 const struct pci_device_id
*ent
)
2492 struct mxser_board
*brd
;
2494 unsigned long ioaddress
;
2495 int retval
= -EINVAL
;
2497 for (i
= 0; i
< MXSER_BOARDS
; i
++)
2498 if (mxser_boards
[i
].info
== NULL
)
2501 if (i
>= MXSER_BOARDS
) {
2502 printk(KERN_ERR
"Too many Smartio/Industio family boards found "
2503 "(maximum %d), board not configured\n", MXSER_BOARDS
);
2507 brd
= &mxser_boards
[i
];
2508 brd
->idx
= i
* MXSER_PORTS_PER_BOARD
;
2509 printk(KERN_INFO
"Found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2510 mxser_cards
[ent
->driver_data
].name
,
2511 pdev
->bus
->number
, PCI_SLOT(pdev
->devfn
));
2513 retval
= pci_enable_device(pdev
);
2515 printk(KERN_ERR
"Moxa SmartI/O PCI enable fail !\n");
2520 ioaddress
= pci_resource_start(pdev
, 2);
2521 retval
= pci_request_region(pdev
, 2, "mxser(IO)");
2525 brd
->info
= &mxser_cards
[ent
->driver_data
];
2526 for (i
= 0; i
< brd
->info
->nports
; i
++)
2527 brd
->ports
[i
].ioaddr
= ioaddress
+ 8 * i
;
2530 ioaddress
= pci_resource_start(pdev
, 3);
2531 retval
= pci_request_region(pdev
, 3, "mxser(vector)");
2534 brd
->vector
= ioaddress
;
2537 brd
->irq
= pdev
->irq
;
2539 brd
->chip_flag
= CheckIsMoxaMust(brd
->ports
[0].ioaddr
);
2540 brd
->uart_type
= PORT_16550A
;
2541 brd
->vector_mask
= 0;
2543 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2544 for (j
= 0; j
< UART_INFO_NUM
; j
++) {
2545 if (Gpci_uart_info
[j
].type
== brd
->chip_flag
) {
2546 brd
->ports
[i
].max_baud
=
2547 Gpci_uart_info
[j
].max_baud
;
2549 /* exception....CP-102 */
2550 if (brd
->info
->flags
& MXSER_HIGHBAUD
)
2551 brd
->ports
[i
].max_baud
= 921600;
2557 if (brd
->chip_flag
== MOXA_MUST_MU860_HWID
) {
2558 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2560 brd
->ports
[i
].opmode_ioaddr
= ioaddress
+ 4;
2562 brd
->ports
[i
].opmode_ioaddr
= ioaddress
+ 0x0c;
2564 outb(0, ioaddress
+ 4); /* default set to RS232 mode */
2565 outb(0, ioaddress
+ 0x0c); /* default set to RS232 mode */
2568 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2569 brd
->vector_mask
|= (1 << i
);
2570 brd
->ports
[i
].baud_base
= 921600;
2573 /* mxser_initbrd will hook ISR. */
2574 retval
= mxser_initbrd(brd
, pdev
);
2578 for (i
= 0; i
< brd
->info
->nports
; i
++)
2579 tty_register_device(mxvar_sdriver
, brd
->idx
+ i
, &pdev
->dev
);
2581 pci_set_drvdata(pdev
, brd
);
2585 pci_release_region(pdev
, 2);
2595 static void __devexit
mxser_remove(struct pci_dev
*pdev
)
2597 struct mxser_board
*brd
= pci_get_drvdata(pdev
);
2600 for (i
= 0; i
< brd
->info
->nports
; i
++)
2601 tty_unregister_device(mxvar_sdriver
, brd
->idx
+ i
);
2603 mxser_release_res(brd
, pdev
, 1);
2607 static struct pci_driver mxser_driver
= {
2609 .id_table
= mxser_pcibrds
,
2610 .probe
= mxser_probe
,
2611 .remove
= __devexit_p(mxser_remove
)
2614 static int __init
mxser_module_init(void)
2616 struct mxser_board
*brd
;
2618 unsigned int i
, m
, isaloop
;
2621 pr_debug("Loading module mxser ...\n");
2623 mxvar_sdriver
= alloc_tty_driver(MXSER_PORTS
+ 1);
2627 printk(KERN_INFO
"MOXA Smartio/Industio family driver version %s\n",
2630 /* Initialize the tty_driver structure */
2631 mxvar_sdriver
->owner
= THIS_MODULE
;
2632 mxvar_sdriver
->magic
= TTY_DRIVER_MAGIC
;
2633 mxvar_sdriver
->name
= "ttyMI";
2634 mxvar_sdriver
->major
= ttymajor
;
2635 mxvar_sdriver
->minor_start
= 0;
2636 mxvar_sdriver
->num
= MXSER_PORTS
+ 1;
2637 mxvar_sdriver
->type
= TTY_DRIVER_TYPE_SERIAL
;
2638 mxvar_sdriver
->subtype
= SERIAL_TYPE_NORMAL
;
2639 mxvar_sdriver
->init_termios
= tty_std_termios
;
2640 mxvar_sdriver
->init_termios
.c_cflag
= B9600
|CS8
|CREAD
|HUPCL
|CLOCAL
;
2641 mxvar_sdriver
->flags
= TTY_DRIVER_REAL_RAW
|TTY_DRIVER_DYNAMIC_DEV
;
2642 tty_set_operations(mxvar_sdriver
, &mxser_ops
);
2644 retval
= tty_register_driver(mxvar_sdriver
);
2646 printk(KERN_ERR
"Couldn't install MOXA Smartio/Industio family "
2654 /* Start finding ISA boards here */
2655 for (isaloop
= 0; isaloop
< 2; isaloop
++)
2656 for (b
= 0; b
< MXSER_BOARDS
&& m
< MXSER_BOARDS
; b
++) {
2658 cap
= mxserBoardCAP
[b
]; /* predefined */
2660 cap
= ioaddr
[b
]; /* module param */
2665 brd
= &mxser_boards
[m
];
2666 retval
= mxser_get_ISA_conf(cap
, brd
);
2669 printk(KERN_INFO
"Found MOXA %s board "
2671 brd
->info
->name
, ioaddr
[b
]);
2674 if (retval
== MXSER_ERR_IRQ
)
2675 printk(KERN_ERR
"Invalid interrupt "
2676 "number, board not "
2678 else if (retval
== MXSER_ERR_IRQ_CONFLIT
)
2679 printk(KERN_ERR
"Invalid interrupt "
2680 "number, board not "
2682 else if (retval
== MXSER_ERR_VECTOR
)
2683 printk(KERN_ERR
"Invalid interrupt "
2684 "vector, board not "
2686 else if (retval
== MXSER_ERR_IOADDR
)
2687 printk(KERN_ERR
"Invalid I/O address, "
2688 "board not configured\n");
2694 /* mxser_initbrd will hook ISR. */
2695 if (mxser_initbrd(brd
, NULL
) < 0) {
2700 brd
->idx
= m
* MXSER_PORTS_PER_BOARD
;
2701 for (i
= 0; i
< brd
->info
->nports
; i
++)
2702 tty_register_device(mxvar_sdriver
, brd
->idx
+ i
,
2708 retval
= pci_register_driver(&mxser_driver
);
2710 printk(KERN_ERR
"Can't register pci driver\n");
2714 } /* else: we have some ISA cards under control */
2717 pr_debug("Done.\n");
2721 tty_unregister_driver(mxvar_sdriver
);
2723 put_tty_driver(mxvar_sdriver
);
2727 static void __exit
mxser_module_exit(void)
2731 pr_debug("Unloading module mxser ...\n");
2733 pci_unregister_driver(&mxser_driver
);
2735 for (i
= 0; i
< MXSER_BOARDS
; i
++) /* ISA remains */
2736 if (mxser_boards
[i
].info
!= NULL
)
2737 for (j
= 0; j
< mxser_boards
[i
].info
->nports
; j
++)
2738 tty_unregister_device(mxvar_sdriver
,
2739 mxser_boards
[i
].idx
+ j
);
2740 tty_unregister_driver(mxvar_sdriver
);
2741 put_tty_driver(mxvar_sdriver
);
2743 for (i
= 0; i
< MXSER_BOARDS
; i
++)
2744 if (mxser_boards
[i
].info
!= NULL
)
2745 mxser_release_res(&mxser_boards
[i
], NULL
, 1);
2747 pr_debug("Done.\n");
2750 module_init(mxser_module_init
);
2751 module_exit(mxser_module_exit
);