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
21 #include <linux/module.h>
22 #include <linux/errno.h>
23 #include <linux/signal.h>
24 #include <linux/sched.h>
25 #include <linux/timer.h>
26 #include <linux/interrupt.h>
27 #include <linux/tty.h>
28 #include <linux/tty_flip.h>
29 #include <linux/serial.h>
30 #include <linux/serial_reg.h>
31 #include <linux/major.h>
32 #include <linux/string.h>
33 #include <linux/fcntl.h>
34 #include <linux/ptrace.h>
35 #include <linux/gfp.h>
36 #include <linux/ioport.h>
38 #include <linux/delay.h>
39 #include <linux/pci.h>
40 #include <linux/bitops.h>
42 #include <asm/system.h>
45 #include <asm/uaccess.h>
49 #define MXSER_VERSION "2.0.4" /* 1.12 */
50 #define MXSERMAJOR 174
51 #define MXSERCUMAJOR 175
53 #define MXSER_BOARDS 4 /* Max. boards */
54 #define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
55 #define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
56 #define MXSER_ISR_PASS_LIMIT 100
58 /*CheckIsMoxaMust return value*/
59 #define MOXA_OTHER_UART 0x00
60 #define MOXA_MUST_MU150_HWID 0x01
61 #define MOXA_MUST_MU860_HWID 0x02
63 #define WAKEUP_CHARS 256
65 #define UART_MCR_AFE 0x20
66 #define UART_LSR_SPECIAL 0x1E
68 #define PCI_DEVICE_ID_POS104UL 0x1044
69 #define PCI_DEVICE_ID_CB108 0x1080
70 #define PCI_DEVICE_ID_CP102UF 0x1023
71 #define PCI_DEVICE_ID_CB114 0x1142
72 #define PCI_DEVICE_ID_CP114UL 0x1143
73 #define PCI_DEVICE_ID_CB134I 0x1341
74 #define PCI_DEVICE_ID_CP138U 0x1380
77 #define C168_ASIC_ID 1
78 #define C104_ASIC_ID 2
79 #define C102_ASIC_ID 0xB
80 #define CI132_ASIC_ID 4
81 #define CI134_ASIC_ID 3
82 #define CI104J_ASIC_ID 5
84 #define MXSER_HIGHBAUD 1
87 /* This is only for PCI */
97 } Gpci_uart_info
[] = {
98 {MOXA_OTHER_UART
, 16, 16, 16, 14, 14, 1, 921600L},
99 {MOXA_MUST_MU150_HWID
, 64, 64, 64, 48, 48, 16, 230400L},
100 {MOXA_MUST_MU860_HWID
, 128, 128, 128, 96, 96, 32, 921600L}
102 #define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info)
104 struct mxser_cardinfo
{
110 static const struct mxser_cardinfo mxser_cards
[] = {
111 /* 0*/ { "C168 series", 8, },
112 { "C104 series", 4, },
113 { "CI-104J series", 4, },
114 { "C168H/PCI series", 8, },
115 { "C104H/PCI series", 4, },
116 /* 5*/ { "C102 series", 4, MXSER_HAS2
}, /* C102-ISA */
117 { "CI-132 series", 4, MXSER_HAS2
},
118 { "CI-134 series", 4, },
119 { "CP-132 series", 2, },
120 { "CP-114 series", 4, },
121 /*10*/ { "CT-114 series", 4, },
122 { "CP-102 series", 2, MXSER_HIGHBAUD
},
123 { "CP-104U series", 4, },
124 { "CP-168U series", 8, },
125 { "CP-132U series", 2, },
126 /*15*/ { "CP-134U series", 4, },
127 { "CP-104JU series", 4, },
128 { "Moxa UC7000 Serial", 8, }, /* RC7000 */
129 { "CP-118U series", 8, },
130 { "CP-102UL series", 2, },
131 /*20*/ { "CP-102U series", 2, },
132 { "CP-118EL series", 8, },
133 { "CP-168EL series", 8, },
134 { "CP-104EL series", 4, },
135 { "CB-108 series", 8, },
136 /*25*/ { "CB-114 series", 4, },
137 { "CB-134I series", 4, },
138 { "CP-138U series", 8, },
139 { "POS-104UL series", 4, },
140 { "CP-114UL series", 4, },
141 /*30*/ { "CP-102UF series", 2, }
144 /* driver_data correspond to the lines in the structure above
145 see also ISA probe function before you change something */
146 static struct pci_device_id mxser_pcibrds
[] = {
147 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_C168
), .driver_data
= 3 },
148 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_C104
), .driver_data
= 4 },
149 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP132
), .driver_data
= 8 },
150 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP114
), .driver_data
= 9 },
151 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CT114
), .driver_data
= 10 },
152 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP102
), .driver_data
= 11 },
153 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP104U
), .driver_data
= 12 },
154 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP168U
), .driver_data
= 13 },
155 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP132U
), .driver_data
= 14 },
156 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP134U
), .driver_data
= 15 },
157 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP104JU
),.driver_data
= 16 },
158 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_RC7000
), .driver_data
= 17 },
159 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP118U
), .driver_data
= 18 },
160 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP102UL
),.driver_data
= 19 },
161 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP102U
), .driver_data
= 20 },
162 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP118EL
),.driver_data
= 21 },
163 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP168EL
),.driver_data
= 22 },
164 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP104EL
),.driver_data
= 23 },
165 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_CB108
), .driver_data
= 24 },
166 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_CB114
), .driver_data
= 25 },
167 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_CB134I
), .driver_data
= 26 },
168 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_CP138U
), .driver_data
= 27 },
169 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_POS104UL
), .driver_data
= 28 },
170 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_CP114UL
), .driver_data
= 29 },
171 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_CP102UF
), .driver_data
= 30 },
174 MODULE_DEVICE_TABLE(pci
, mxser_pcibrds
);
176 static int ioaddr
[MXSER_BOARDS
] = { 0, 0, 0, 0 };
177 static int ttymajor
= MXSERMAJOR
;
179 /* Variables for insmod */
181 MODULE_AUTHOR("Casper Yang");
182 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
183 module_param_array(ioaddr
, int, NULL
, 0);
184 module_param(ttymajor
, int, 0);
185 MODULE_LICENSE("GPL");
189 unsigned long rxcnt
[MXSER_PORTS
];
190 unsigned long txcnt
[MXSER_PORTS
];
197 unsigned long up_rxcnt
;
198 unsigned long up_txcnt
;
200 unsigned char hold_reason
;
203 struct mxser_mon_ext
{
204 unsigned long rx_cnt
[32];
205 unsigned long tx_cnt
[32];
206 unsigned long up_rxcnt
[32];
207 unsigned long up_txcnt
[32];
208 int modem_status
[32];
222 struct tty_port port
;
223 struct mxser_board
*board
;
225 unsigned long ioaddr
;
226 unsigned long opmode_ioaddr
;
230 int rx_trigger
; /* Rx fifo trigger level */
232 int baud_base
; /* max. speed */
233 int type
; /* UART type */
235 int x_char
; /* xon/xoff character */
236 int IER
; /* Interrupt Enable Register */
237 int MCR
; /* Modem control register */
239 unsigned char stop_rx
;
240 unsigned char ldisc_stop_rx
;
243 unsigned char err_shadow
;
245 struct async_icount icount
; /* kernel counters for 4 input interrupts */
248 int read_status_mask
;
249 int ignore_status_mask
;
255 struct ktermios normal_termios
;
257 struct mxser_mon mon_data
;
260 wait_queue_head_t delta_msr_wait
;
266 const struct mxser_cardinfo
*info
;
267 unsigned long vector
;
268 unsigned long vector_mask
;
273 struct mxser_port ports
[MXSER_PORTS_PER_BOARD
];
276 struct mxser_mstatus
{
284 static int mxserBoardCAP
[MXSER_BOARDS
] = {
286 /* 0x180, 0x280, 0x200, 0x320 */
289 static struct mxser_board mxser_boards
[MXSER_BOARDS
];
290 static struct tty_driver
*mxvar_sdriver
;
291 static struct mxser_log mxvar_log
;
292 static int mxser_set_baud_method
[MXSER_PORTS
+ 1];
294 static void mxser_enable_must_enchance_mode(unsigned long baseio
)
299 oldlcr
= inb(baseio
+ UART_LCR
);
300 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
302 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
303 efr
|= MOXA_MUST_EFR_EFRB_ENABLE
;
305 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
306 outb(oldlcr
, baseio
+ UART_LCR
);
309 static void mxser_disable_must_enchance_mode(unsigned long baseio
)
314 oldlcr
= inb(baseio
+ UART_LCR
);
315 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
317 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
318 efr
&= ~MOXA_MUST_EFR_EFRB_ENABLE
;
320 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
321 outb(oldlcr
, baseio
+ UART_LCR
);
324 static void mxser_set_must_xon1_value(unsigned long baseio
, u8 value
)
329 oldlcr
= inb(baseio
+ UART_LCR
);
330 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
332 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
333 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
334 efr
|= MOXA_MUST_EFR_BANK0
;
336 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
337 outb(value
, baseio
+ MOXA_MUST_XON1_REGISTER
);
338 outb(oldlcr
, baseio
+ UART_LCR
);
341 static void mxser_set_must_xoff1_value(unsigned long baseio
, u8 value
)
346 oldlcr
= inb(baseio
+ UART_LCR
);
347 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
349 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
350 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
351 efr
|= MOXA_MUST_EFR_BANK0
;
353 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
354 outb(value
, baseio
+ MOXA_MUST_XOFF1_REGISTER
);
355 outb(oldlcr
, baseio
+ UART_LCR
);
358 static void mxser_set_must_fifo_value(struct mxser_port
*info
)
363 oldlcr
= inb(info
->ioaddr
+ UART_LCR
);
364 outb(MOXA_MUST_ENTER_ENCHANCE
, info
->ioaddr
+ UART_LCR
);
366 efr
= inb(info
->ioaddr
+ MOXA_MUST_EFR_REGISTER
);
367 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
368 efr
|= MOXA_MUST_EFR_BANK1
;
370 outb(efr
, info
->ioaddr
+ MOXA_MUST_EFR_REGISTER
);
371 outb((u8
)info
->rx_high_water
, info
->ioaddr
+ MOXA_MUST_RBRTH_REGISTER
);
372 outb((u8
)info
->rx_trigger
, info
->ioaddr
+ MOXA_MUST_RBRTI_REGISTER
);
373 outb((u8
)info
->rx_low_water
, info
->ioaddr
+ MOXA_MUST_RBRTL_REGISTER
);
374 outb(oldlcr
, info
->ioaddr
+ UART_LCR
);
377 static void mxser_set_must_enum_value(unsigned long baseio
, u8 value
)
382 oldlcr
= inb(baseio
+ UART_LCR
);
383 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
385 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
386 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
387 efr
|= MOXA_MUST_EFR_BANK2
;
389 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
390 outb(value
, baseio
+ MOXA_MUST_ENUM_REGISTER
);
391 outb(oldlcr
, baseio
+ UART_LCR
);
394 static void mxser_get_must_hardware_id(unsigned long baseio
, u8
*pId
)
399 oldlcr
= inb(baseio
+ UART_LCR
);
400 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
402 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
403 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
404 efr
|= MOXA_MUST_EFR_BANK2
;
406 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
407 *pId
= inb(baseio
+ MOXA_MUST_HWID_REGISTER
);
408 outb(oldlcr
, baseio
+ UART_LCR
);
411 static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio
)
416 oldlcr
= inb(baseio
+ UART_LCR
);
417 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
419 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
420 efr
&= ~MOXA_MUST_EFR_SF_MASK
;
422 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
423 outb(oldlcr
, baseio
+ UART_LCR
);
426 static void mxser_enable_must_tx_software_flow_control(unsigned long baseio
)
431 oldlcr
= inb(baseio
+ UART_LCR
);
432 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
434 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
435 efr
&= ~MOXA_MUST_EFR_SF_TX_MASK
;
436 efr
|= MOXA_MUST_EFR_SF_TX1
;
438 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
439 outb(oldlcr
, baseio
+ UART_LCR
);
442 static void mxser_disable_must_tx_software_flow_control(unsigned long baseio
)
447 oldlcr
= inb(baseio
+ UART_LCR
);
448 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
450 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
451 efr
&= ~MOXA_MUST_EFR_SF_TX_MASK
;
453 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
454 outb(oldlcr
, baseio
+ UART_LCR
);
457 static void mxser_enable_must_rx_software_flow_control(unsigned long baseio
)
462 oldlcr
= inb(baseio
+ UART_LCR
);
463 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
465 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
466 efr
&= ~MOXA_MUST_EFR_SF_RX_MASK
;
467 efr
|= MOXA_MUST_EFR_SF_RX1
;
469 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
470 outb(oldlcr
, baseio
+ UART_LCR
);
473 static void mxser_disable_must_rx_software_flow_control(unsigned long baseio
)
478 oldlcr
= inb(baseio
+ UART_LCR
);
479 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
481 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
482 efr
&= ~MOXA_MUST_EFR_SF_RX_MASK
;
484 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
485 outb(oldlcr
, baseio
+ UART_LCR
);
489 static int __devinit
CheckIsMoxaMust(unsigned long io
)
494 outb(0, io
+ UART_LCR
);
495 mxser_disable_must_enchance_mode(io
);
496 oldmcr
= inb(io
+ UART_MCR
);
497 outb(0, io
+ UART_MCR
);
498 mxser_set_must_xon1_value(io
, 0x11);
499 if ((hwid
= inb(io
+ UART_MCR
)) != 0) {
500 outb(oldmcr
, io
+ UART_MCR
);
501 return MOXA_OTHER_UART
;
504 mxser_get_must_hardware_id(io
, &hwid
);
505 for (i
= 1; i
< UART_INFO_NUM
; i
++) { /* 0 = OTHER_UART */
506 if (hwid
== Gpci_uart_info
[i
].type
)
509 return MOXA_OTHER_UART
;
513 static void process_txrx_fifo(struct mxser_port
*info
)
517 if ((info
->type
== PORT_16450
) || (info
->type
== PORT_8250
)) {
518 info
->rx_trigger
= 1;
519 info
->rx_high_water
= 1;
520 info
->rx_low_water
= 1;
521 info
->xmit_fifo_size
= 1;
523 for (i
= 0; i
< UART_INFO_NUM
; i
++)
524 if (info
->board
->chip_flag
== Gpci_uart_info
[i
].type
) {
525 info
->rx_trigger
= Gpci_uart_info
[i
].rx_trigger
;
526 info
->rx_low_water
= Gpci_uart_info
[i
].rx_low_water
;
527 info
->rx_high_water
= Gpci_uart_info
[i
].rx_high_water
;
528 info
->xmit_fifo_size
= Gpci_uart_info
[i
].xmit_fifo_size
;
533 static unsigned char mxser_get_msr(int baseaddr
, int mode
, int port
)
535 static unsigned char mxser_msr
[MXSER_PORTS
+ 1];
536 unsigned char status
= 0;
538 status
= inb(baseaddr
+ UART_MSR
);
540 mxser_msr
[port
] &= 0x0F;
541 mxser_msr
[port
] |= status
;
542 status
= mxser_msr
[port
];
549 static int mxser_block_til_ready(struct tty_struct
*tty
, struct file
*filp
,
550 struct mxser_port
*port
)
552 DECLARE_WAITQUEUE(wait
, current
);
558 * If non-blocking mode is set, or the port is not enabled,
559 * then make the check up front and then exit.
561 if ((filp
->f_flags
& O_NONBLOCK
) ||
562 test_bit(TTY_IO_ERROR
, &tty
->flags
)) {
563 port
->port
.flags
|= ASYNC_NORMAL_ACTIVE
;
567 if (tty
->termios
->c_cflag
& CLOCAL
)
571 * Block waiting for the carrier detect and the line to become
572 * free (i.e., not in use by the callout). While we are in
573 * this loop, port->port.count is dropped by one, so that
574 * mxser_close() knows when to free things. We restore it upon
575 * exit, either normal or abnormal.
578 add_wait_queue(&port
->port
.open_wait
, &wait
);
580 spin_lock_irqsave(&port
->slock
, flags
);
581 if (!tty_hung_up_p(filp
))
583 spin_unlock_irqrestore(&port
->slock
, flags
);
584 port
->port
.blocked_open
++;
586 spin_lock_irqsave(&port
->slock
, flags
);
587 outb(inb(port
->ioaddr
+ UART_MCR
) |
588 UART_MCR_DTR
| UART_MCR_RTS
, port
->ioaddr
+ UART_MCR
);
589 spin_unlock_irqrestore(&port
->slock
, flags
);
590 set_current_state(TASK_INTERRUPTIBLE
);
591 if (tty_hung_up_p(filp
) || !(port
->port
.flags
& ASYNC_INITIALIZED
)) {
592 if (port
->port
.flags
& ASYNC_HUP_NOTIFY
)
595 retval
= -ERESTARTSYS
;
598 if (!(port
->port
.flags
& ASYNC_CLOSING
) &&
600 (inb(port
->ioaddr
+ UART_MSR
) & UART_MSR_DCD
)))
602 if (signal_pending(current
)) {
603 retval
= -ERESTARTSYS
;
608 set_current_state(TASK_RUNNING
);
609 remove_wait_queue(&port
->port
.open_wait
, &wait
);
610 if (!tty_hung_up_p(filp
))
612 port
->port
.blocked_open
--;
615 port
->port
.flags
|= ASYNC_NORMAL_ACTIVE
;
619 static int mxser_set_baud(struct mxser_port
*info
, long newspd
)
624 if (!info
->port
.tty
|| !info
->port
.tty
->termios
)
630 if (newspd
> info
->max_baud
)
634 quot
= 2 * info
->baud_base
/ 269;
635 tty_encode_baud_rate(info
->port
.tty
, 134, 134);
637 quot
= info
->baud_base
/ newspd
;
640 baud
= info
->baud_base
/quot
;
641 tty_encode_baud_rate(info
->port
.tty
, baud
, baud
);
646 info
->timeout
= ((info
->xmit_fifo_size
* HZ
* 10 * quot
) / info
->baud_base
);
647 info
->timeout
+= HZ
/ 50; /* Add .02 seconds of slop */
650 info
->MCR
|= UART_MCR_DTR
;
651 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
653 info
->MCR
&= ~UART_MCR_DTR
;
654 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
658 cval
= inb(info
->ioaddr
+ UART_LCR
);
660 outb(cval
| UART_LCR_DLAB
, info
->ioaddr
+ UART_LCR
); /* set DLAB */
662 outb(quot
& 0xff, info
->ioaddr
+ UART_DLL
); /* LS of divisor */
663 outb(quot
>> 8, info
->ioaddr
+ UART_DLM
); /* MS of divisor */
664 outb(cval
, info
->ioaddr
+ UART_LCR
); /* reset DLAB */
667 if (C_BAUD(info
->port
.tty
) == BOTHER
) {
668 quot
= info
->baud_base
% newspd
;
670 if (quot
% newspd
> newspd
/ 2) {
676 mxser_set_must_enum_value(info
->ioaddr
, quot
);
679 mxser_set_must_enum_value(info
->ioaddr
, 0);
685 * This routine is called to set the UART divisor registers to match
686 * the specified baud rate for a serial port.
688 static int mxser_change_speed(struct mxser_port
*info
,
689 struct ktermios
*old_termios
)
691 unsigned cflag
, cval
, fcr
;
693 unsigned char status
;
695 if (!info
->port
.tty
|| !info
->port
.tty
->termios
)
697 cflag
= info
->port
.tty
->termios
->c_cflag
;
701 if (mxser_set_baud_method
[info
->port
.tty
->index
] == 0)
702 mxser_set_baud(info
, tty_get_baud_rate(info
->port
.tty
));
704 /* byte size and parity */
705 switch (cflag
& CSIZE
) {
720 break; /* too keep GCC shut... */
725 cval
|= UART_LCR_PARITY
;
726 if (!(cflag
& PARODD
))
727 cval
|= UART_LCR_EPAR
;
729 cval
|= UART_LCR_SPAR
;
731 if ((info
->type
== PORT_8250
) || (info
->type
== PORT_16450
)) {
732 if (info
->board
->chip_flag
) {
733 fcr
= UART_FCR_ENABLE_FIFO
;
734 fcr
|= MOXA_MUST_FCR_GDA_MODE_ENABLE
;
735 mxser_set_must_fifo_value(info
);
739 fcr
= UART_FCR_ENABLE_FIFO
;
740 if (info
->board
->chip_flag
) {
741 fcr
|= MOXA_MUST_FCR_GDA_MODE_ENABLE
;
742 mxser_set_must_fifo_value(info
);
744 switch (info
->rx_trigger
) {
746 fcr
|= UART_FCR_TRIGGER_1
;
749 fcr
|= UART_FCR_TRIGGER_4
;
752 fcr
|= UART_FCR_TRIGGER_8
;
755 fcr
|= UART_FCR_TRIGGER_14
;
761 /* CTS flow control flag and modem status interrupts */
762 info
->IER
&= ~UART_IER_MSI
;
763 info
->MCR
&= ~UART_MCR_AFE
;
764 if (cflag
& CRTSCTS
) {
765 info
->port
.flags
|= ASYNC_CTS_FLOW
;
766 info
->IER
|= UART_IER_MSI
;
767 if ((info
->type
== PORT_16550A
) || (info
->board
->chip_flag
)) {
768 info
->MCR
|= UART_MCR_AFE
;
770 status
= inb(info
->ioaddr
+ UART_MSR
);
771 if (info
->port
.tty
->hw_stopped
) {
772 if (status
& UART_MSR_CTS
) {
773 info
->port
.tty
->hw_stopped
= 0;
774 if (info
->type
!= PORT_16550A
&&
775 !info
->board
->chip_flag
) {
776 outb(info
->IER
& ~UART_IER_THRI
,
779 info
->IER
|= UART_IER_THRI
;
780 outb(info
->IER
, info
->ioaddr
+
783 tty_wakeup(info
->port
.tty
);
786 if (!(status
& UART_MSR_CTS
)) {
787 info
->port
.tty
->hw_stopped
= 1;
788 if ((info
->type
!= PORT_16550A
) &&
789 (!info
->board
->chip_flag
)) {
790 info
->IER
&= ~UART_IER_THRI
;
791 outb(info
->IER
, info
->ioaddr
+
798 info
->port
.flags
&= ~ASYNC_CTS_FLOW
;
800 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
801 if (cflag
& CLOCAL
) {
802 info
->port
.flags
&= ~ASYNC_CHECK_CD
;
804 info
->port
.flags
|= ASYNC_CHECK_CD
;
805 info
->IER
|= UART_IER_MSI
;
807 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
810 * Set up parity check flag
812 info
->read_status_mask
= UART_LSR_OE
| UART_LSR_THRE
| UART_LSR_DR
;
813 if (I_INPCK(info
->port
.tty
))
814 info
->read_status_mask
|= UART_LSR_FE
| UART_LSR_PE
;
815 if (I_BRKINT(info
->port
.tty
) || I_PARMRK(info
->port
.tty
))
816 info
->read_status_mask
|= UART_LSR_BI
;
818 info
->ignore_status_mask
= 0;
820 if (I_IGNBRK(info
->port
.tty
)) {
821 info
->ignore_status_mask
|= UART_LSR_BI
;
822 info
->read_status_mask
|= UART_LSR_BI
;
824 * If we're ignore parity and break indicators, ignore
825 * overruns too. (For real raw support).
827 if (I_IGNPAR(info
->port
.tty
)) {
828 info
->ignore_status_mask
|=
832 info
->read_status_mask
|=
838 if (info
->board
->chip_flag
) {
839 mxser_set_must_xon1_value(info
->ioaddr
, START_CHAR(info
->port
.tty
));
840 mxser_set_must_xoff1_value(info
->ioaddr
, STOP_CHAR(info
->port
.tty
));
841 if (I_IXON(info
->port
.tty
)) {
842 mxser_enable_must_rx_software_flow_control(
845 mxser_disable_must_rx_software_flow_control(
848 if (I_IXOFF(info
->port
.tty
)) {
849 mxser_enable_must_tx_software_flow_control(
852 mxser_disable_must_tx_software_flow_control(
858 outb(fcr
, info
->ioaddr
+ UART_FCR
); /* set fcr */
859 outb(cval
, info
->ioaddr
+ UART_LCR
);
864 static void mxser_check_modem_status(struct mxser_port
*port
, int status
)
866 /* update input line counters */
867 if (status
& UART_MSR_TERI
)
869 if (status
& UART_MSR_DDSR
)
871 if (status
& UART_MSR_DDCD
)
873 if (status
& UART_MSR_DCTS
)
875 port
->mon_data
.modem_status
= status
;
876 wake_up_interruptible(&port
->delta_msr_wait
);
878 if ((port
->port
.flags
& ASYNC_CHECK_CD
) && (status
& UART_MSR_DDCD
)) {
879 if (status
& UART_MSR_DCD
)
880 wake_up_interruptible(&port
->port
.open_wait
);
883 if (port
->port
.flags
& ASYNC_CTS_FLOW
) {
884 if (port
->port
.tty
->hw_stopped
) {
885 if (status
& UART_MSR_CTS
) {
886 port
->port
.tty
->hw_stopped
= 0;
888 if ((port
->type
!= PORT_16550A
) &&
889 (!port
->board
->chip_flag
)) {
890 outb(port
->IER
& ~UART_IER_THRI
,
891 port
->ioaddr
+ UART_IER
);
892 port
->IER
|= UART_IER_THRI
;
893 outb(port
->IER
, port
->ioaddr
+
896 tty_wakeup(port
->port
.tty
);
899 if (!(status
& UART_MSR_CTS
)) {
900 port
->port
.tty
->hw_stopped
= 1;
901 if (port
->type
!= PORT_16550A
&&
902 !port
->board
->chip_flag
) {
903 port
->IER
&= ~UART_IER_THRI
;
904 outb(port
->IER
, port
->ioaddr
+
912 static int mxser_startup(struct mxser_port
*info
)
917 page
= __get_free_page(GFP_KERNEL
);
921 spin_lock_irqsave(&info
->slock
, flags
);
923 if (info
->port
.flags
& ASYNC_INITIALIZED
) {
925 spin_unlock_irqrestore(&info
->slock
, flags
);
929 if (!info
->ioaddr
|| !info
->type
) {
931 set_bit(TTY_IO_ERROR
, &info
->port
.tty
->flags
);
933 spin_unlock_irqrestore(&info
->slock
, flags
);
936 if (info
->port
.xmit_buf
)
939 info
->port
.xmit_buf
= (unsigned char *) page
;
942 * Clear the FIFO buffers and disable them
943 * (they will be reenabled in mxser_change_speed())
945 if (info
->board
->chip_flag
)
946 outb((UART_FCR_CLEAR_RCVR
|
947 UART_FCR_CLEAR_XMIT
|
948 MOXA_MUST_FCR_GDA_MODE_ENABLE
), info
->ioaddr
+ UART_FCR
);
950 outb((UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
),
951 info
->ioaddr
+ UART_FCR
);
954 * At this point there's no way the LSR could still be 0xFF;
955 * if it is, then bail out, because there's likely no UART
958 if (inb(info
->ioaddr
+ UART_LSR
) == 0xff) {
959 spin_unlock_irqrestore(&info
->slock
, flags
);
960 if (capable(CAP_SYS_ADMIN
)) {
962 set_bit(TTY_IO_ERROR
, &info
->port
.tty
->flags
);
969 * Clear the interrupt registers.
971 (void) inb(info
->ioaddr
+ UART_LSR
);
972 (void) inb(info
->ioaddr
+ UART_RX
);
973 (void) inb(info
->ioaddr
+ UART_IIR
);
974 (void) inb(info
->ioaddr
+ UART_MSR
);
977 * Now, initialize the UART
979 outb(UART_LCR_WLEN8
, info
->ioaddr
+ UART_LCR
); /* reset DLAB */
980 info
->MCR
= UART_MCR_DTR
| UART_MCR_RTS
;
981 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
984 * Finally, enable interrupts
986 info
->IER
= UART_IER_MSI
| UART_IER_RLSI
| UART_IER_RDI
;
988 if (info
->board
->chip_flag
)
989 info
->IER
|= MOXA_MUST_IER_EGDAI
;
990 outb(info
->IER
, info
->ioaddr
+ UART_IER
); /* enable interrupts */
993 * And clear the interrupt registers again for luck.
995 (void) inb(info
->ioaddr
+ UART_LSR
);
996 (void) inb(info
->ioaddr
+ UART_RX
);
997 (void) inb(info
->ioaddr
+ UART_IIR
);
998 (void) inb(info
->ioaddr
+ UART_MSR
);
1001 clear_bit(TTY_IO_ERROR
, &info
->port
.tty
->flags
);
1002 info
->xmit_cnt
= info
->xmit_head
= info
->xmit_tail
= 0;
1005 * and set the speed of the serial port
1007 mxser_change_speed(info
, NULL
);
1008 info
->port
.flags
|= ASYNC_INITIALIZED
;
1009 spin_unlock_irqrestore(&info
->slock
, flags
);
1015 * This routine will shutdown a serial port; interrupts maybe disabled, and
1016 * DTR is dropped if the hangup on close termio flag is on.
1018 static void mxser_shutdown(struct mxser_port
*info
)
1020 unsigned long flags
;
1022 if (!(info
->port
.flags
& ASYNC_INITIALIZED
))
1025 spin_lock_irqsave(&info
->slock
, flags
);
1028 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
1029 * here so the queue might never be waken up
1031 wake_up_interruptible(&info
->delta_msr_wait
);
1034 * Free the IRQ, if necessary
1036 if (info
->port
.xmit_buf
) {
1037 free_page((unsigned long) info
->port
.xmit_buf
);
1038 info
->port
.xmit_buf
= NULL
;
1042 outb(0x00, info
->ioaddr
+ UART_IER
);
1044 if (!info
->port
.tty
|| (info
->port
.tty
->termios
->c_cflag
& HUPCL
))
1045 info
->MCR
&= ~(UART_MCR_DTR
| UART_MCR_RTS
);
1046 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
1048 /* clear Rx/Tx FIFO's */
1049 if (info
->board
->chip_flag
)
1050 outb(UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
|
1051 MOXA_MUST_FCR_GDA_MODE_ENABLE
,
1052 info
->ioaddr
+ UART_FCR
);
1054 outb(UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
,
1055 info
->ioaddr
+ UART_FCR
);
1057 /* read data port to reset things */
1058 (void) inb(info
->ioaddr
+ UART_RX
);
1061 set_bit(TTY_IO_ERROR
, &info
->port
.tty
->flags
);
1063 info
->port
.flags
&= ~ASYNC_INITIALIZED
;
1065 if (info
->board
->chip_flag
)
1066 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info
->ioaddr
);
1068 spin_unlock_irqrestore(&info
->slock
, flags
);
1072 * This routine is called whenever a serial port is opened. It
1073 * enables interrupts for a serial port, linking in its async structure into
1074 * the IRQ chain. It also performs the serial-specific
1075 * initialization for the tty structure.
1077 static int mxser_open(struct tty_struct
*tty
, struct file
*filp
)
1079 struct mxser_port
*info
;
1080 unsigned long flags
;
1084 if (line
== MXSER_PORTS
)
1086 if (line
< 0 || line
> MXSER_PORTS
)
1088 info
= &mxser_boards
[line
/ MXSER_PORTS_PER_BOARD
].ports
[line
% MXSER_PORTS_PER_BOARD
];
1092 tty
->driver_data
= info
;
1093 info
->port
.tty
= tty
;
1095 * Start up serial port
1097 spin_lock_irqsave(&info
->slock
, flags
);
1099 spin_unlock_irqrestore(&info
->slock
, flags
);
1100 retval
= mxser_startup(info
);
1104 retval
= mxser_block_til_ready(tty
, filp
, info
);
1108 /* unmark here for very high baud rate (ex. 921600 bps) used */
1109 tty
->low_latency
= 1;
1113 static void mxser_flush_buffer(struct tty_struct
*tty
)
1115 struct mxser_port
*info
= tty
->driver_data
;
1117 unsigned long flags
;
1120 spin_lock_irqsave(&info
->slock
, flags
);
1121 info
->xmit_cnt
= info
->xmit_head
= info
->xmit_tail
= 0;
1123 fcr
= inb(info
->ioaddr
+ UART_FCR
);
1124 outb((fcr
| UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
),
1125 info
->ioaddr
+ UART_FCR
);
1126 outb(fcr
, info
->ioaddr
+ UART_FCR
);
1128 spin_unlock_irqrestore(&info
->slock
, flags
);
1135 * This routine is called when the serial port gets closed. First, we
1136 * wait for the last remaining data to be sent. Then, we unlink its
1137 * async structure from the interrupt chain if necessary, and we free
1138 * that IRQ if nothing is left in the chain.
1140 static void mxser_close(struct tty_struct
*tty
, struct file
*filp
)
1142 struct mxser_port
*info
= tty
->driver_data
;
1144 unsigned long timeout
;
1145 unsigned long flags
;
1147 if (tty
->index
== MXSER_PORTS
)
1152 spin_lock_irqsave(&info
->slock
, flags
);
1154 if (tty_hung_up_p(filp
)) {
1155 spin_unlock_irqrestore(&info
->slock
, flags
);
1158 if ((tty
->count
== 1) && (info
->port
.count
!= 1)) {
1160 * Uh, oh. tty->count is 1, which means that the tty
1161 * structure will be freed. Info->port.count should always
1162 * be one in these conditions. If it's greater than
1163 * one, we've got real problems, since it means the
1164 * serial port won't be shutdown.
1166 printk(KERN_ERR
"mxser_close: bad serial port count; "
1167 "tty->count is 1, info->port.count is %d\n", info
->port
.count
);
1168 info
->port
.count
= 1;
1170 if (--info
->port
.count
< 0) {
1171 printk(KERN_ERR
"mxser_close: bad serial port count for "
1172 "ttys%d: %d\n", tty
->index
, info
->port
.count
);
1173 info
->port
.count
= 0;
1175 if (info
->port
.count
) {
1176 spin_unlock_irqrestore(&info
->slock
, flags
);
1179 info
->port
.flags
|= ASYNC_CLOSING
;
1180 spin_unlock_irqrestore(&info
->slock
, flags
);
1182 * Save the termios structure, since this port may have
1183 * separate termios for callout and dialin.
1185 if (info
->port
.flags
& ASYNC_NORMAL_ACTIVE
)
1186 info
->normal_termios
= *tty
->termios
;
1188 * Now we wait for the transmit buffer to clear; and we notify
1189 * the line discipline to only process XON/XOFF characters.
1192 if (info
->port
.closing_wait
!= ASYNC_CLOSING_WAIT_NONE
)
1193 tty_wait_until_sent(tty
, info
->port
.closing_wait
);
1195 * At this point we stop accepting input. To do this, we
1196 * disable the receive line status interrupts, and tell the
1197 * interrupt driver to stop checking the data ready bit in the
1198 * line status register.
1200 info
->IER
&= ~UART_IER_RLSI
;
1201 if (info
->board
->chip_flag
)
1202 info
->IER
&= ~MOXA_MUST_RECV_ISR
;
1204 if (info
->port
.flags
& ASYNC_INITIALIZED
) {
1205 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1207 * Before we drop DTR, make sure the UART transmitter
1208 * has completely drained; this is especially
1209 * important if there is a transmit FIFO!
1211 timeout
= jiffies
+ HZ
;
1212 while (!(inb(info
->ioaddr
+ UART_LSR
) & UART_LSR_TEMT
)) {
1213 schedule_timeout_interruptible(5);
1214 if (time_after(jiffies
, timeout
))
1218 mxser_shutdown(info
);
1220 mxser_flush_buffer(tty
);
1221 tty_ldisc_flush(tty
);
1224 info
->port
.tty
= NULL
;
1225 if (info
->port
.blocked_open
) {
1226 if (info
->port
.close_delay
)
1227 schedule_timeout_interruptible(info
->port
.close_delay
);
1228 wake_up_interruptible(&info
->port
.open_wait
);
1231 info
->port
.flags
&= ~(ASYNC_NORMAL_ACTIVE
| ASYNC_CLOSING
);
1234 static int mxser_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
1237 struct mxser_port
*info
= tty
->driver_data
;
1238 unsigned long flags
;
1240 if (!info
->port
.xmit_buf
)
1244 c
= min_t(int, count
, min(SERIAL_XMIT_SIZE
- info
->xmit_cnt
- 1,
1245 SERIAL_XMIT_SIZE
- info
->xmit_head
));
1249 memcpy(info
->port
.xmit_buf
+ info
->xmit_head
, buf
, c
);
1250 spin_lock_irqsave(&info
->slock
, flags
);
1251 info
->xmit_head
= (info
->xmit_head
+ c
) &
1252 (SERIAL_XMIT_SIZE
- 1);
1253 info
->xmit_cnt
+= c
;
1254 spin_unlock_irqrestore(&info
->slock
, flags
);
1261 if (info
->xmit_cnt
&& !tty
->stopped
) {
1262 if (!tty
->hw_stopped
||
1263 (info
->type
== PORT_16550A
) ||
1264 (info
->board
->chip_flag
)) {
1265 spin_lock_irqsave(&info
->slock
, flags
);
1266 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+
1268 info
->IER
|= UART_IER_THRI
;
1269 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1270 spin_unlock_irqrestore(&info
->slock
, flags
);
1276 static int mxser_put_char(struct tty_struct
*tty
, unsigned char ch
)
1278 struct mxser_port
*info
= tty
->driver_data
;
1279 unsigned long flags
;
1281 if (!info
->port
.xmit_buf
)
1284 if (info
->xmit_cnt
>= SERIAL_XMIT_SIZE
- 1)
1287 spin_lock_irqsave(&info
->slock
, flags
);
1288 info
->port
.xmit_buf
[info
->xmit_head
++] = ch
;
1289 info
->xmit_head
&= SERIAL_XMIT_SIZE
- 1;
1291 spin_unlock_irqrestore(&info
->slock
, flags
);
1292 if (!tty
->stopped
) {
1293 if (!tty
->hw_stopped
||
1294 (info
->type
== PORT_16550A
) ||
1295 info
->board
->chip_flag
) {
1296 spin_lock_irqsave(&info
->slock
, flags
);
1297 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
1298 info
->IER
|= UART_IER_THRI
;
1299 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1300 spin_unlock_irqrestore(&info
->slock
, flags
);
1307 static void mxser_flush_chars(struct tty_struct
*tty
)
1309 struct mxser_port
*info
= tty
->driver_data
;
1310 unsigned long flags
;
1312 if (info
->xmit_cnt
<= 0 ||
1314 !info
->port
.xmit_buf
||
1316 (info
->type
!= PORT_16550A
) &&
1317 (!info
->board
->chip_flag
)
1321 spin_lock_irqsave(&info
->slock
, flags
);
1323 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
1324 info
->IER
|= UART_IER_THRI
;
1325 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1327 spin_unlock_irqrestore(&info
->slock
, flags
);
1330 static int mxser_write_room(struct tty_struct
*tty
)
1332 struct mxser_port
*info
= tty
->driver_data
;
1335 ret
= SERIAL_XMIT_SIZE
- info
->xmit_cnt
- 1;
1341 static int mxser_chars_in_buffer(struct tty_struct
*tty
)
1343 struct mxser_port
*info
= tty
->driver_data
;
1344 return info
->xmit_cnt
;
1348 * ------------------------------------------------------------
1349 * friends of mxser_ioctl()
1350 * ------------------------------------------------------------
1352 static int mxser_get_serial_info(struct mxser_port
*info
,
1353 struct serial_struct __user
*retinfo
)
1355 struct serial_struct tmp
= {
1357 .line
= info
->port
.tty
->index
,
1358 .port
= info
->ioaddr
,
1359 .irq
= info
->board
->irq
,
1360 .flags
= info
->port
.flags
,
1361 .baud_base
= info
->baud_base
,
1362 .close_delay
= info
->port
.close_delay
,
1363 .closing_wait
= info
->port
.closing_wait
,
1364 .custom_divisor
= info
->custom_divisor
,
1367 if (copy_to_user(retinfo
, &tmp
, sizeof(*retinfo
)))
1372 static int mxser_set_serial_info(struct mxser_port
*info
,
1373 struct serial_struct __user
*new_info
)
1375 struct serial_struct new_serial
;
1377 unsigned long sl_flags
;
1381 if (!new_info
|| !info
->ioaddr
)
1383 if (copy_from_user(&new_serial
, new_info
, sizeof(new_serial
)))
1386 if (new_serial
.irq
!= info
->board
->irq
||
1387 new_serial
.port
!= info
->ioaddr
)
1390 flags
= info
->port
.flags
& ASYNC_SPD_MASK
;
1392 if (!capable(CAP_SYS_ADMIN
)) {
1393 if ((new_serial
.baud_base
!= info
->baud_base
) ||
1394 (new_serial
.close_delay
!= info
->port
.close_delay
) ||
1395 ((new_serial
.flags
& ~ASYNC_USR_MASK
) != (info
->port
.flags
& ~ASYNC_USR_MASK
)))
1397 info
->port
.flags
= ((info
->port
.flags
& ~ASYNC_USR_MASK
) |
1398 (new_serial
.flags
& ASYNC_USR_MASK
));
1401 * OK, past this point, all the error checking has been done.
1402 * At this point, we start making changes.....
1404 info
->port
.flags
= ((info
->port
.flags
& ~ASYNC_FLAGS
) |
1405 (new_serial
.flags
& ASYNC_FLAGS
));
1406 info
->port
.close_delay
= new_serial
.close_delay
* HZ
/ 100;
1407 info
->port
.closing_wait
= new_serial
.closing_wait
* HZ
/ 100;
1408 info
->port
.tty
->low_latency
=
1409 (info
->port
.flags
& ASYNC_LOW_LATENCY
) ? 1 : 0;
1410 if ((info
->port
.flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_CUST
&&
1411 (new_serial
.baud_base
!= info
->baud_base
||
1412 new_serial
.custom_divisor
!=
1413 info
->custom_divisor
)) {
1414 baud
= new_serial
.baud_base
/ new_serial
.custom_divisor
;
1415 tty_encode_baud_rate(info
->port
.tty
, baud
, baud
);
1419 info
->type
= new_serial
.type
;
1421 process_txrx_fifo(info
);
1423 if (info
->port
.flags
& ASYNC_INITIALIZED
) {
1424 if (flags
!= (info
->port
.flags
& ASYNC_SPD_MASK
)) {
1425 spin_lock_irqsave(&info
->slock
, sl_flags
);
1426 mxser_change_speed(info
, NULL
);
1427 spin_unlock_irqrestore(&info
->slock
, sl_flags
);
1430 retval
= mxser_startup(info
);
1436 * mxser_get_lsr_info - get line status register info
1438 * Purpose: Let user call ioctl() to get info when the UART physically
1439 * is emptied. On bus types like RS485, the transmitter must
1440 * release the bus after transmitting. This must be done when
1441 * the transmit shift register is empty, not be done when the
1442 * transmit holding register is empty. This functionality
1443 * allows an RS485 driver to be written in user space.
1445 static int mxser_get_lsr_info(struct mxser_port
*info
,
1446 unsigned int __user
*value
)
1448 unsigned char status
;
1449 unsigned int result
;
1450 unsigned long flags
;
1452 spin_lock_irqsave(&info
->slock
, flags
);
1453 status
= inb(info
->ioaddr
+ UART_LSR
);
1454 spin_unlock_irqrestore(&info
->slock
, flags
);
1455 result
= ((status
& UART_LSR_TEMT
) ? TIOCSER_TEMT
: 0);
1456 return put_user(result
, value
);
1459 static int mxser_tiocmget(struct tty_struct
*tty
, struct file
*file
)
1461 struct mxser_port
*info
= tty
->driver_data
;
1462 unsigned char control
, status
;
1463 unsigned long flags
;
1466 if (tty
->index
== MXSER_PORTS
)
1467 return -ENOIOCTLCMD
;
1468 if (test_bit(TTY_IO_ERROR
, &tty
->flags
))
1471 control
= info
->MCR
;
1473 spin_lock_irqsave(&info
->slock
, flags
);
1474 status
= inb(info
->ioaddr
+ UART_MSR
);
1475 if (status
& UART_MSR_ANY_DELTA
)
1476 mxser_check_modem_status(info
, status
);
1477 spin_unlock_irqrestore(&info
->slock
, flags
);
1478 return ((control
& UART_MCR_RTS
) ? TIOCM_RTS
: 0) |
1479 ((control
& UART_MCR_DTR
) ? TIOCM_DTR
: 0) |
1480 ((status
& UART_MSR_DCD
) ? TIOCM_CAR
: 0) |
1481 ((status
& UART_MSR_RI
) ? TIOCM_RNG
: 0) |
1482 ((status
& UART_MSR_DSR
) ? TIOCM_DSR
: 0) |
1483 ((status
& UART_MSR_CTS
) ? TIOCM_CTS
: 0);
1486 static int mxser_tiocmset(struct tty_struct
*tty
, struct file
*file
,
1487 unsigned int set
, unsigned int clear
)
1489 struct mxser_port
*info
= tty
->driver_data
;
1490 unsigned long flags
;
1493 if (tty
->index
== MXSER_PORTS
)
1494 return -ENOIOCTLCMD
;
1495 if (test_bit(TTY_IO_ERROR
, &tty
->flags
))
1498 spin_lock_irqsave(&info
->slock
, flags
);
1500 if (set
& TIOCM_RTS
)
1501 info
->MCR
|= UART_MCR_RTS
;
1502 if (set
& TIOCM_DTR
)
1503 info
->MCR
|= UART_MCR_DTR
;
1505 if (clear
& TIOCM_RTS
)
1506 info
->MCR
&= ~UART_MCR_RTS
;
1507 if (clear
& TIOCM_DTR
)
1508 info
->MCR
&= ~UART_MCR_DTR
;
1510 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
1511 spin_unlock_irqrestore(&info
->slock
, flags
);
1515 static int __init
mxser_program_mode(int port
)
1527 id
= inb(port
+ 1) & 0x1F;
1528 if ((id
!= C168_ASIC_ID
) &&
1529 (id
!= C104_ASIC_ID
) &&
1530 (id
!= C102_ASIC_ID
) &&
1531 (id
!= CI132_ASIC_ID
) &&
1532 (id
!= CI134_ASIC_ID
) &&
1533 (id
!= CI104J_ASIC_ID
))
1535 for (i
= 0, j
= 0; i
< 4; i
++) {
1539 } else if ((j
== 1) && (n
== 1)) {
1550 static void __init
mxser_normal_mode(int port
)
1554 outb(0xA5, port
+ 1);
1555 outb(0x80, port
+ 3);
1556 outb(12, port
+ 0); /* 9600 bps */
1558 outb(0x03, port
+ 3); /* 8 data bits */
1559 outb(0x13, port
+ 4); /* loop back mode */
1560 for (i
= 0; i
< 16; i
++) {
1562 if ((n
& 0x61) == 0x60)
1567 outb(0x00, port
+ 4);
1570 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
1571 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
1572 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
1573 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
1574 #define EN_CCMD 0x000 /* Chip's command register */
1575 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
1576 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
1577 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
1578 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
1579 #define EN0_DCFG 0x00E /* Data configuration reg WR */
1580 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
1581 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
1582 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
1583 static int __init
mxser_read_register(int port
, unsigned short *regs
)
1585 int i
, k
, value
, id
;
1588 id
= mxser_program_mode(port
);
1591 for (i
= 0; i
< 14; i
++) {
1592 k
= (i
& 0x3F) | 0x180;
1593 for (j
= 0x100; j
> 0; j
>>= 1) {
1594 outb(CHIP_CS
, port
);
1596 outb(CHIP_CS
| CHIP_DO
, port
);
1597 outb(CHIP_CS
| CHIP_DO
| CHIP_SK
, port
); /* A? bit of read */
1599 outb(CHIP_CS
, port
);
1600 outb(CHIP_CS
| CHIP_SK
, port
); /* A? bit of read */
1605 for (k
= 0, j
= 0x8000; k
< 16; k
++, j
>>= 1) {
1606 outb(CHIP_CS
, port
);
1607 outb(CHIP_CS
| CHIP_SK
, port
);
1608 if (inb(port
) & CHIP_DI
)
1614 mxser_normal_mode(port
);
1618 static int mxser_ioctl_special(unsigned int cmd
, void __user
*argp
)
1620 struct mxser_port
*port
;
1626 case MOXA_GET_MAJOR
:
1627 printk(KERN_WARNING
"mxser: '%s' uses deprecated ioctl %x, fix "
1628 "your userspace\n", current
->comm
, cmd
);
1629 return put_user(ttymajor
, (int __user
*)argp
);
1631 case MOXA_CHKPORTENABLE
:
1634 for (i
= 0; i
< MXSER_BOARDS
; i
++)
1635 for (j
= 0; j
< MXSER_PORTS_PER_BOARD
; j
++)
1636 if (mxser_boards
[i
].ports
[j
].ioaddr
)
1639 return put_user(result
, (unsigned long __user
*)argp
);
1640 case MOXA_GETDATACOUNT
:
1642 if (copy_to_user(argp
, &mxvar_log
, sizeof(mxvar_log
)))
1646 case MOXA_GETMSTATUS
: {
1647 struct mxser_mstatus ms
, __user
*msu
= argp
;
1649 for (i
= 0; i
< MXSER_BOARDS
; i
++)
1650 for (j
= 0; j
< MXSER_PORTS_PER_BOARD
; j
++) {
1651 port
= &mxser_boards
[i
].ports
[j
];
1652 memset(&ms
, 0, sizeof(ms
));
1657 if (!port
->port
.tty
|| !port
->port
.tty
->termios
)
1658 ms
.cflag
= port
->normal_termios
.c_cflag
;
1660 ms
.cflag
= port
->port
.tty
->termios
->c_cflag
;
1662 status
= inb(port
->ioaddr
+ UART_MSR
);
1663 if (status
& UART_MSR_DCD
)
1665 if (status
& UART_MSR_DSR
)
1667 if (status
& UART_MSR_CTS
)
1670 if (copy_to_user(msu
, &ms
, sizeof(ms
))) {
1679 case MOXA_ASPP_MON_EXT
: {
1680 struct mxser_mon_ext
*me
; /* it's 2k, stack unfriendly */
1681 unsigned int cflag
, iflag
, p
;
1684 me
= kzalloc(sizeof(*me
), GFP_KERNEL
);
1689 for (i
= 0, p
= 0; i
< MXSER_BOARDS
; i
++) {
1690 for (j
= 0; j
< MXSER_PORTS_PER_BOARD
; j
++, p
++) {
1691 if (p
>= ARRAY_SIZE(me
->rx_cnt
)) {
1695 port
= &mxser_boards
[i
].ports
[j
];
1699 status
= mxser_get_msr(port
->ioaddr
, 0, p
);
1701 if (status
& UART_MSR_TERI
)
1703 if (status
& UART_MSR_DDSR
)
1705 if (status
& UART_MSR_DDCD
)
1707 if (status
& UART_MSR_DCTS
)
1710 port
->mon_data
.modem_status
= status
;
1711 me
->rx_cnt
[p
] = port
->mon_data
.rxcnt
;
1712 me
->tx_cnt
[p
] = port
->mon_data
.txcnt
;
1713 me
->up_rxcnt
[p
] = port
->mon_data
.up_rxcnt
;
1714 me
->up_txcnt
[p
] = port
->mon_data
.up_txcnt
;
1715 me
->modem_status
[p
] =
1716 port
->mon_data
.modem_status
;
1717 me
->baudrate
[p
] = tty_get_baud_rate(port
->port
.tty
);
1719 if (!port
->port
.tty
|| !port
->port
.tty
->termios
) {
1720 cflag
= port
->normal_termios
.c_cflag
;
1721 iflag
= port
->normal_termios
.c_iflag
;
1723 cflag
= port
->port
.tty
->termios
->c_cflag
;
1724 iflag
= port
->port
.tty
->termios
->c_iflag
;
1727 me
->databits
[p
] = cflag
& CSIZE
;
1728 me
->stopbits
[p
] = cflag
& CSTOPB
;
1729 me
->parity
[p
] = cflag
& (PARENB
| PARODD
|
1732 if (cflag
& CRTSCTS
)
1733 me
->flowctrl
[p
] |= 0x03;
1735 if (iflag
& (IXON
| IXOFF
))
1736 me
->flowctrl
[p
] |= 0x0C;
1738 if (port
->type
== PORT_16550A
)
1741 opmode
= inb(port
->opmode_ioaddr
) >>
1743 opmode
&= OP_MODE_MASK
;
1744 me
->iftype
[p
] = opmode
;
1748 if (copy_to_user(argp
, me
, sizeof(*me
)))
1754 return -ENOIOCTLCMD
;
1759 static int mxser_cflags_changed(struct mxser_port
*info
, unsigned long arg
,
1760 struct async_icount
*cprev
)
1762 struct async_icount cnow
;
1763 unsigned long flags
;
1766 spin_lock_irqsave(&info
->slock
, flags
);
1767 cnow
= info
->icount
; /* atomic copy */
1768 spin_unlock_irqrestore(&info
->slock
, flags
);
1770 ret
= ((arg
& TIOCM_RNG
) && (cnow
.rng
!= cprev
->rng
)) ||
1771 ((arg
& TIOCM_DSR
) && (cnow
.dsr
!= cprev
->dsr
)) ||
1772 ((arg
& TIOCM_CD
) && (cnow
.dcd
!= cprev
->dcd
)) ||
1773 ((arg
& TIOCM_CTS
) && (cnow
.cts
!= cprev
->cts
));
1780 static int mxser_ioctl(struct tty_struct
*tty
, struct file
*file
,
1781 unsigned int cmd
, unsigned long arg
)
1783 struct mxser_port
*info
= tty
->driver_data
;
1784 struct async_icount cnow
;
1785 unsigned long flags
;
1786 void __user
*argp
= (void __user
*)arg
;
1789 if (tty
->index
== MXSER_PORTS
)
1790 return mxser_ioctl_special(cmd
, argp
);
1792 if (cmd
== MOXA_SET_OP_MODE
|| cmd
== MOXA_GET_OP_MODE
) {
1794 unsigned long opmode
;
1795 static unsigned char ModeMask
[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1797 unsigned char val
, mask
;
1800 if (cmd
== MOXA_SET_OP_MODE
) {
1801 if (get_user(opmode
, (int __user
*) argp
))
1803 if (opmode
!= RS232_MODE
&&
1804 opmode
!= RS485_2WIRE_MODE
&&
1805 opmode
!= RS422_MODE
&&
1806 opmode
!= RS485_4WIRE_MODE
)
1811 val
= inb(info
->opmode_ioaddr
);
1813 val
|= (opmode
<< shiftbit
);
1814 outb(val
, info
->opmode_ioaddr
);
1819 opmode
= inb(info
->opmode_ioaddr
) >> shiftbit
;
1820 opmode
&= OP_MODE_MASK
;
1822 if (put_user(opmode
, (int __user
*)argp
))
1828 if (cmd
!= TIOCGSERIAL
&& cmd
!= TIOCMIWAIT
&& cmd
!= TIOCGICOUNT
&&
1829 test_bit(TTY_IO_ERROR
, &tty
->flags
))
1835 retval
= mxser_get_serial_info(info
, argp
);
1840 retval
= mxser_set_serial_info(info
, argp
);
1843 case TIOCSERGETLSR
: /* Get line status register */
1844 return mxser_get_lsr_info(info
, argp
);
1846 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1847 * - mask passed in arg for lines of interest
1848 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1849 * Caller should use TIOCGICOUNT to see which one it was
1852 spin_lock_irqsave(&info
->slock
, flags
);
1853 cnow
= info
->icount
; /* note the counters on entry */
1854 spin_unlock_irqrestore(&info
->slock
, flags
);
1856 return wait_event_interruptible(info
->delta_msr_wait
,
1857 mxser_cflags_changed(info
, arg
, &cnow
));
1859 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1860 * Return: write counters to the user passed counter struct
1861 * NB: both 1->0 and 0->1 transitions are counted except for
1862 * RI where only 0->1 is counted.
1865 struct serial_icounter_struct icnt
= { 0 };
1866 spin_lock_irqsave(&info
->slock
, flags
);
1867 cnow
= info
->icount
;
1868 spin_unlock_irqrestore(&info
->slock
, flags
);
1870 icnt
.frame
= cnow
.frame
;
1871 icnt
.brk
= cnow
.brk
;
1872 icnt
.overrun
= cnow
.overrun
;
1873 icnt
.buf_overrun
= cnow
.buf_overrun
;
1874 icnt
.parity
= cnow
.parity
;
1877 icnt
.cts
= cnow
.cts
;
1878 icnt
.dsr
= cnow
.dsr
;
1879 icnt
.rng
= cnow
.rng
;
1880 icnt
.dcd
= cnow
.dcd
;
1882 return copy_to_user(argp
, &icnt
, sizeof(icnt
)) ? -EFAULT
: 0;
1884 case MOXA_HighSpeedOn
:
1885 return put_user(info
->baud_base
!= 115200 ? 1 : 0, (int __user
*)argp
);
1886 case MOXA_SDS_RSTICOUNTER
:
1888 info
->mon_data
.rxcnt
= 0;
1889 info
->mon_data
.txcnt
= 0;
1893 case MOXA_ASPP_OQUEUE
:{
1897 len
= mxser_chars_in_buffer(tty
);
1898 lsr
= inb(info
->ioaddr
+ UART_LSR
) & UART_LSR_TEMT
;
1899 len
+= (lsr
? 0 : 1);
1902 return put_user(len
, (int __user
*)argp
);
1904 case MOXA_ASPP_MON
: {
1908 status
= mxser_get_msr(info
->ioaddr
, 1, tty
->index
);
1909 mxser_check_modem_status(info
, status
);
1911 mcr
= inb(info
->ioaddr
+ UART_MCR
);
1912 if (mcr
& MOXA_MUST_MCR_XON_FLAG
)
1913 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_XOFFHOLD
;
1915 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_XOFFHOLD
;
1917 if (mcr
& MOXA_MUST_MCR_TX_XON
)
1918 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_XOFFXENT
;
1920 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_XOFFXENT
;
1922 if (info
->port
.tty
->hw_stopped
)
1923 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_CTSHOLD
;
1925 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_CTSHOLD
;
1927 if (copy_to_user(argp
, &info
->mon_data
,
1928 sizeof(struct mxser_mon
)))
1933 case MOXA_ASPP_LSTATUS
: {
1934 if (put_user(info
->err_shadow
, (unsigned char __user
*)argp
))
1937 info
->err_shadow
= 0;
1940 case MOXA_SET_BAUD_METHOD
: {
1943 if (get_user(method
, (int __user
*)argp
))
1945 mxser_set_baud_method
[tty
->index
] = method
;
1946 return put_user(method
, (int __user
*)argp
);
1949 return -ENOIOCTLCMD
;
1954 static void mxser_stoprx(struct tty_struct
*tty
)
1956 struct mxser_port
*info
= tty
->driver_data
;
1958 info
->ldisc_stop_rx
= 1;
1960 if (info
->board
->chip_flag
) {
1961 info
->IER
&= ~MOXA_MUST_RECV_ISR
;
1962 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1964 info
->x_char
= STOP_CHAR(tty
);
1965 outb(0, info
->ioaddr
+ UART_IER
);
1966 info
->IER
|= UART_IER_THRI
;
1967 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1971 if (info
->port
.tty
->termios
->c_cflag
& CRTSCTS
) {
1972 info
->MCR
&= ~UART_MCR_RTS
;
1973 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
1978 * This routine is called by the upper-layer tty layer to signal that
1979 * incoming characters should be throttled.
1981 static void mxser_throttle(struct tty_struct
*tty
)
1986 static void mxser_unthrottle(struct tty_struct
*tty
)
1988 struct mxser_port
*info
= tty
->driver_data
;
1991 info
->ldisc_stop_rx
= 0;
1996 if (info
->board
->chip_flag
) {
1997 info
->IER
|= MOXA_MUST_RECV_ISR
;
1998 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
2000 info
->x_char
= START_CHAR(tty
);
2001 outb(0, info
->ioaddr
+ UART_IER
);
2002 info
->IER
|= UART_IER_THRI
;
2003 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
2008 if (info
->port
.tty
->termios
->c_cflag
& CRTSCTS
) {
2009 info
->MCR
|= UART_MCR_RTS
;
2010 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
2015 * mxser_stop() and mxser_start()
2017 * This routines are called before setting or resetting tty->stopped.
2018 * They enable or disable transmitter interrupts, as necessary.
2020 static void mxser_stop(struct tty_struct
*tty
)
2022 struct mxser_port
*info
= tty
->driver_data
;
2023 unsigned long flags
;
2025 spin_lock_irqsave(&info
->slock
, flags
);
2026 if (info
->IER
& UART_IER_THRI
) {
2027 info
->IER
&= ~UART_IER_THRI
;
2028 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
2030 spin_unlock_irqrestore(&info
->slock
, flags
);
2033 static void mxser_start(struct tty_struct
*tty
)
2035 struct mxser_port
*info
= tty
->driver_data
;
2036 unsigned long flags
;
2038 spin_lock_irqsave(&info
->slock
, flags
);
2039 if (info
->xmit_cnt
&& info
->port
.xmit_buf
) {
2040 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
2041 info
->IER
|= UART_IER_THRI
;
2042 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
2044 spin_unlock_irqrestore(&info
->slock
, flags
);
2047 static void mxser_set_termios(struct tty_struct
*tty
, struct ktermios
*old_termios
)
2049 struct mxser_port
*info
= tty
->driver_data
;
2050 unsigned long flags
;
2052 spin_lock_irqsave(&info
->slock
, flags
);
2053 mxser_change_speed(info
, old_termios
);
2054 spin_unlock_irqrestore(&info
->slock
, flags
);
2056 if ((old_termios
->c_cflag
& CRTSCTS
) &&
2057 !(tty
->termios
->c_cflag
& CRTSCTS
)) {
2058 tty
->hw_stopped
= 0;
2062 /* Handle sw stopped */
2063 if ((old_termios
->c_iflag
& IXON
) &&
2064 !(tty
->termios
->c_iflag
& IXON
)) {
2067 if (info
->board
->chip_flag
) {
2068 spin_lock_irqsave(&info
->slock
, flags
);
2069 mxser_disable_must_rx_software_flow_control(
2071 spin_unlock_irqrestore(&info
->slock
, flags
);
2079 * mxser_wait_until_sent() --- wait until the transmitter is empty
2081 static void mxser_wait_until_sent(struct tty_struct
*tty
, int timeout
)
2083 struct mxser_port
*info
= tty
->driver_data
;
2084 unsigned long orig_jiffies
, char_time
;
2087 if (info
->type
== PORT_UNKNOWN
)
2090 if (info
->xmit_fifo_size
== 0)
2091 return; /* Just in case.... */
2093 orig_jiffies
= jiffies
;
2095 * Set the check interval to be 1/5 of the estimated time to
2096 * send a single character, and make it at least 1. The check
2097 * interval should also be less than the timeout.
2099 * Note: we have to use pretty tight timings here to satisfy
2102 char_time
= (info
->timeout
- HZ
/ 50) / info
->xmit_fifo_size
;
2103 char_time
= char_time
/ 5;
2106 if (timeout
&& timeout
< char_time
)
2107 char_time
= timeout
;
2109 * If the transmitter hasn't cleared in twice the approximate
2110 * amount of time to send the entire FIFO, it probably won't
2111 * ever clear. This assumes the UART isn't doing flow
2112 * control, which is currently the case. Hence, if it ever
2113 * takes longer than info->timeout, this is probably due to a
2114 * UART bug of some kind. So, we clamp the timeout parameter at
2117 if (!timeout
|| timeout
> 2 * info
->timeout
)
2118 timeout
= 2 * info
->timeout
;
2119 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2120 printk(KERN_DEBUG
"In rs_wait_until_sent(%d) check=%lu...",
2121 timeout
, char_time
);
2122 printk("jiff=%lu...", jiffies
);
2125 while (!((lsr
= inb(info
->ioaddr
+ UART_LSR
)) & UART_LSR_TEMT
)) {
2126 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2127 printk("lsr = %d (jiff=%lu)...", lsr
, jiffies
);
2129 schedule_timeout_interruptible(char_time
);
2130 if (signal_pending(current
))
2132 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2135 set_current_state(TASK_RUNNING
);
2138 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2139 printk("lsr = %d (jiff=%lu)...done\n", lsr
, jiffies
);
2144 * This routine is called by tty_hangup() when a hangup is signaled.
2146 static void mxser_hangup(struct tty_struct
*tty
)
2148 struct mxser_port
*info
= tty
->driver_data
;
2150 mxser_flush_buffer(tty
);
2151 mxser_shutdown(info
);
2152 info
->port
.count
= 0;
2153 info
->port
.flags
&= ~ASYNC_NORMAL_ACTIVE
;
2154 info
->port
.tty
= NULL
;
2155 wake_up_interruptible(&info
->port
.open_wait
);
2159 * mxser_rs_break() --- routine which turns the break handling on or off
2161 static int mxser_rs_break(struct tty_struct
*tty
, int break_state
)
2163 struct mxser_port
*info
= tty
->driver_data
;
2164 unsigned long flags
;
2166 spin_lock_irqsave(&info
->slock
, flags
);
2167 if (break_state
== -1)
2168 outb(inb(info
->ioaddr
+ UART_LCR
) | UART_LCR_SBC
,
2169 info
->ioaddr
+ UART_LCR
);
2171 outb(inb(info
->ioaddr
+ UART_LCR
) & ~UART_LCR_SBC
,
2172 info
->ioaddr
+ UART_LCR
);
2173 spin_unlock_irqrestore(&info
->slock
, flags
);
2177 static void mxser_receive_chars(struct mxser_port
*port
, int *status
)
2179 struct tty_struct
*tty
= port
->port
.tty
;
2180 unsigned char ch
, gdl
;
2186 recv_room
= tty
->receive_room
;
2187 if ((recv_room
== 0) && (!port
->ldisc_stop_rx
))
2190 if (port
->board
->chip_flag
!= MOXA_OTHER_UART
) {
2192 if (*status
& UART_LSR_SPECIAL
)
2194 if (port
->board
->chip_flag
== MOXA_MUST_MU860_HWID
&&
2195 (*status
& MOXA_MUST_LSR_RERR
))
2197 if (*status
& MOXA_MUST_LSR_RERR
)
2200 gdl
= inb(port
->ioaddr
+ MOXA_MUST_GDL_REGISTER
);
2202 if (port
->board
->chip_flag
== MOXA_MUST_MU150_HWID
)
2203 gdl
&= MOXA_MUST_GDL_MASK
;
2204 if (gdl
>= recv_room
) {
2205 if (!port
->ldisc_stop_rx
)
2209 ch
= inb(port
->ioaddr
+ UART_RX
);
2210 tty_insert_flip_char(tty
, ch
, 0);
2221 ch
= inb(port
->ioaddr
+ UART_RX
);
2222 if (port
->board
->chip_flag
&& (*status
& UART_LSR_OE
))
2223 outb(0x23, port
->ioaddr
+ UART_FCR
);
2224 *status
&= port
->read_status_mask
;
2225 if (*status
& port
->ignore_status_mask
) {
2226 if (++ignored
> 100)
2230 if (*status
& UART_LSR_SPECIAL
) {
2231 if (*status
& UART_LSR_BI
) {
2235 if (port
->port
.flags
& ASYNC_SAK
)
2237 } else if (*status
& UART_LSR_PE
) {
2239 port
->icount
.parity
++;
2240 } else if (*status
& UART_LSR_FE
) {
2242 port
->icount
.frame
++;
2243 } else if (*status
& UART_LSR_OE
) {
2245 port
->icount
.overrun
++;
2249 tty_insert_flip_char(tty
, ch
, flag
);
2251 if (cnt
>= recv_room
) {
2252 if (!port
->ldisc_stop_rx
)
2259 if (port
->board
->chip_flag
)
2262 *status
= inb(port
->ioaddr
+ UART_LSR
);
2263 } while (*status
& UART_LSR_DR
);
2266 mxvar_log
.rxcnt
[port
->port
.tty
->index
] += cnt
;
2267 port
->mon_data
.rxcnt
+= cnt
;
2268 port
->mon_data
.up_rxcnt
+= cnt
;
2271 * We are called from an interrupt context with &port->slock
2272 * being held. Drop it temporarily in order to prevent
2273 * recursive locking.
2275 spin_unlock(&port
->slock
);
2276 tty_flip_buffer_push(tty
);
2277 spin_lock(&port
->slock
);
2280 static void mxser_transmit_chars(struct mxser_port
*port
)
2285 outb(port
->x_char
, port
->ioaddr
+ UART_TX
);
2287 mxvar_log
.txcnt
[port
->port
.tty
->index
]++;
2288 port
->mon_data
.txcnt
++;
2289 port
->mon_data
.up_txcnt
++;
2294 if (port
->port
.xmit_buf
== NULL
)
2297 if ((port
->xmit_cnt
<= 0) || port
->port
.tty
->stopped
||
2298 (port
->port
.tty
->hw_stopped
&&
2299 (port
->type
!= PORT_16550A
) &&
2300 (!port
->board
->chip_flag
))) {
2301 port
->IER
&= ~UART_IER_THRI
;
2302 outb(port
->IER
, port
->ioaddr
+ UART_IER
);
2306 cnt
= port
->xmit_cnt
;
2307 count
= port
->xmit_fifo_size
;
2309 outb(port
->port
.xmit_buf
[port
->xmit_tail
++],
2310 port
->ioaddr
+ UART_TX
);
2311 port
->xmit_tail
= port
->xmit_tail
& (SERIAL_XMIT_SIZE
- 1);
2312 if (--port
->xmit_cnt
<= 0)
2314 } while (--count
> 0);
2315 mxvar_log
.txcnt
[port
->port
.tty
->index
] += (cnt
- port
->xmit_cnt
);
2317 port
->mon_data
.txcnt
+= (cnt
- port
->xmit_cnt
);
2318 port
->mon_data
.up_txcnt
+= (cnt
- port
->xmit_cnt
);
2319 port
->icount
.tx
+= (cnt
- port
->xmit_cnt
);
2321 if (port
->xmit_cnt
< WAKEUP_CHARS
)
2322 tty_wakeup(port
->port
.tty
);
2324 if (port
->xmit_cnt
<= 0) {
2325 port
->IER
&= ~UART_IER_THRI
;
2326 outb(port
->IER
, port
->ioaddr
+ UART_IER
);
2331 * This is the serial driver's generic interrupt routine
2333 static irqreturn_t
mxser_interrupt(int irq
, void *dev_id
)
2336 struct mxser_board
*brd
= NULL
;
2337 struct mxser_port
*port
;
2338 int max
, irqbits
, bits
, msr
;
2339 unsigned int int_cnt
, pass_counter
= 0;
2340 int handled
= IRQ_NONE
;
2342 for (i
= 0; i
< MXSER_BOARDS
; i
++)
2343 if (dev_id
== &mxser_boards
[i
]) {
2348 if (i
== MXSER_BOARDS
)
2352 max
= brd
->info
->nports
;
2353 while (pass_counter
++ < MXSER_ISR_PASS_LIMIT
) {
2354 irqbits
= inb(brd
->vector
) & brd
->vector_mask
;
2355 if (irqbits
== brd
->vector_mask
)
2358 handled
= IRQ_HANDLED
;
2359 for (i
= 0, bits
= 1; i
< max
; i
++, irqbits
|= bits
, bits
<<= 1) {
2360 if (irqbits
== brd
->vector_mask
)
2364 port
= &brd
->ports
[i
];
2367 spin_lock(&port
->slock
);
2369 iir
= inb(port
->ioaddr
+ UART_IIR
);
2370 if (iir
& UART_IIR_NO_INT
)
2372 iir
&= MOXA_MUST_IIR_MASK
;
2373 if (!port
->port
.tty
||
2374 (port
->port
.flags
& ASYNC_CLOSING
) ||
2375 !(port
->port
.flags
&
2376 ASYNC_INITIALIZED
)) {
2377 status
= inb(port
->ioaddr
+ UART_LSR
);
2378 outb(0x27, port
->ioaddr
+ UART_FCR
);
2379 inb(port
->ioaddr
+ UART_MSR
);
2383 status
= inb(port
->ioaddr
+ UART_LSR
);
2385 if (status
& UART_LSR_PE
)
2386 port
->err_shadow
|= NPPI_NOTIFY_PARITY
;
2387 if (status
& UART_LSR_FE
)
2388 port
->err_shadow
|= NPPI_NOTIFY_FRAMING
;
2389 if (status
& UART_LSR_OE
)
2391 NPPI_NOTIFY_HW_OVERRUN
;
2392 if (status
& UART_LSR_BI
)
2393 port
->err_shadow
|= NPPI_NOTIFY_BREAK
;
2395 if (port
->board
->chip_flag
) {
2396 if (iir
== MOXA_MUST_IIR_GDA
||
2397 iir
== MOXA_MUST_IIR_RDA
||
2398 iir
== MOXA_MUST_IIR_RTO
||
2399 iir
== MOXA_MUST_IIR_LSR
)
2400 mxser_receive_chars(port
,
2404 status
&= port
->read_status_mask
;
2405 if (status
& UART_LSR_DR
)
2406 mxser_receive_chars(port
,
2409 msr
= inb(port
->ioaddr
+ UART_MSR
);
2410 if (msr
& UART_MSR_ANY_DELTA
)
2411 mxser_check_modem_status(port
, msr
);
2413 if (port
->board
->chip_flag
) {
2414 if (iir
== 0x02 && (status
&
2416 mxser_transmit_chars(port
);
2418 if (status
& UART_LSR_THRE
)
2419 mxser_transmit_chars(port
);
2421 } while (int_cnt
++ < MXSER_ISR_PASS_LIMIT
);
2422 spin_unlock(&port
->slock
);
2430 static const struct tty_operations mxser_ops
= {
2432 .close
= mxser_close
,
2433 .write
= mxser_write
,
2434 .put_char
= mxser_put_char
,
2435 .flush_chars
= mxser_flush_chars
,
2436 .write_room
= mxser_write_room
,
2437 .chars_in_buffer
= mxser_chars_in_buffer
,
2438 .flush_buffer
= mxser_flush_buffer
,
2439 .ioctl
= mxser_ioctl
,
2440 .throttle
= mxser_throttle
,
2441 .unthrottle
= mxser_unthrottle
,
2442 .set_termios
= mxser_set_termios
,
2444 .start
= mxser_start
,
2445 .hangup
= mxser_hangup
,
2446 .break_ctl
= mxser_rs_break
,
2447 .wait_until_sent
= mxser_wait_until_sent
,
2448 .tiocmget
= mxser_tiocmget
,
2449 .tiocmset
= mxser_tiocmset
,
2453 * The MOXA Smartio/Industio serial driver boot-time initialization code!
2456 static void mxser_release_res(struct mxser_board
*brd
, struct pci_dev
*pdev
,
2460 free_irq(brd
->irq
, brd
);
2461 if (pdev
!= NULL
) { /* PCI */
2463 pci_release_region(pdev
, 2);
2464 pci_release_region(pdev
, 3);
2467 release_region(brd
->ports
[0].ioaddr
, 8 * brd
->info
->nports
);
2468 release_region(brd
->vector
, 1);
2472 static int __devinit
mxser_initbrd(struct mxser_board
*brd
,
2473 struct pci_dev
*pdev
)
2475 struct mxser_port
*info
;
2479 printk(KERN_INFO
"mxser: max. baud rate = %d bps\n",
2480 brd
->ports
[0].max_baud
);
2482 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2483 info
= &brd
->ports
[i
];
2484 tty_port_init(&info
->port
);
2487 info
->ldisc_stop_rx
= 0;
2489 /* Enhance mode enabled here */
2490 if (brd
->chip_flag
!= MOXA_OTHER_UART
)
2491 mxser_enable_must_enchance_mode(info
->ioaddr
);
2493 info
->port
.flags
= ASYNC_SHARE_IRQ
;
2494 info
->type
= brd
->uart_type
;
2496 process_txrx_fifo(info
);
2498 info
->custom_divisor
= info
->baud_base
* 16;
2499 info
->port
.close_delay
= 5 * HZ
/ 10;
2500 info
->port
.closing_wait
= 30 * HZ
;
2501 info
->normal_termios
= mxvar_sdriver
->init_termios
;
2502 init_waitqueue_head(&info
->delta_msr_wait
);
2503 memset(&info
->mon_data
, 0, sizeof(struct mxser_mon
));
2504 info
->err_shadow
= 0;
2505 spin_lock_init(&info
->slock
);
2507 /* before set INT ISR, disable all int */
2508 outb(inb(info
->ioaddr
+ UART_IER
) & 0xf0,
2509 info
->ioaddr
+ UART_IER
);
2512 retval
= request_irq(brd
->irq
, mxser_interrupt
, IRQF_SHARED
, "mxser",
2515 printk(KERN_ERR
"Board %s: Request irq failed, IRQ (%d) may "
2516 "conflict with another device.\n",
2517 brd
->info
->name
, brd
->irq
);
2518 /* We hold resources, we need to release them. */
2519 mxser_release_res(brd
, pdev
, 0);
2524 static int __init
mxser_get_ISA_conf(int cap
, struct mxser_board
*brd
)
2527 unsigned short regs
[16], irq
;
2528 unsigned char scratch
, scratch2
;
2530 brd
->chip_flag
= MOXA_OTHER_UART
;
2532 id
= mxser_read_register(cap
, regs
);
2535 brd
->info
= &mxser_cards
[0];
2538 brd
->info
= &mxser_cards
[1];
2540 case CI104J_ASIC_ID
:
2541 brd
->info
= &mxser_cards
[2];
2544 brd
->info
= &mxser_cards
[5];
2547 brd
->info
= &mxser_cards
[6];
2550 brd
->info
= &mxser_cards
[7];
2557 /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2558 Flag-hack checks if configuration should be read as 2-port here. */
2559 if (brd
->info
->nports
== 2 || (brd
->info
->flags
& MXSER_HAS2
)) {
2560 irq
= regs
[9] & 0xF000;
2561 irq
= irq
| (irq
>> 4);
2562 if (irq
!= (regs
[9] & 0xFF00))
2563 goto err_irqconflict
;
2564 } else if (brd
->info
->nports
== 4) {
2565 irq
= regs
[9] & 0xF000;
2566 irq
= irq
| (irq
>> 4);
2567 irq
= irq
| (irq
>> 8);
2569 goto err_irqconflict
;
2570 } else if (brd
->info
->nports
== 8) {
2571 irq
= regs
[9] & 0xF000;
2572 irq
= irq
| (irq
>> 4);
2573 irq
= irq
| (irq
>> 8);
2574 if ((irq
!= regs
[9]) || (irq
!= regs
[10]))
2575 goto err_irqconflict
;
2579 printk(KERN_ERR
"mxser: interrupt number unset\n");
2582 brd
->irq
= ((int)(irq
& 0xF000) >> 12);
2583 for (i
= 0; i
< 8; i
++)
2584 brd
->ports
[i
].ioaddr
= (int) regs
[i
+ 1] & 0xFFF8;
2585 if ((regs
[12] & 0x80) == 0) {
2586 printk(KERN_ERR
"mxser: invalid interrupt vector\n");
2589 brd
->vector
= (int)regs
[11]; /* interrupt vector */
2591 brd
->vector_mask
= 0x00FF;
2593 brd
->vector_mask
= 0x000F;
2594 for (i
= 7, bits
= 0x0100; i
>= 0; i
--, bits
<<= 1) {
2595 if (regs
[12] & bits
) {
2596 brd
->ports
[i
].baud_base
= 921600;
2597 brd
->ports
[i
].max_baud
= 921600;
2599 brd
->ports
[i
].baud_base
= 115200;
2600 brd
->ports
[i
].max_baud
= 115200;
2603 scratch2
= inb(cap
+ UART_LCR
) & (~UART_LCR_DLAB
);
2604 outb(scratch2
| UART_LCR_DLAB
, cap
+ UART_LCR
);
2605 outb(0, cap
+ UART_EFR
); /* EFR is the same as FCR */
2606 outb(scratch2
, cap
+ UART_LCR
);
2607 outb(UART_FCR_ENABLE_FIFO
, cap
+ UART_FCR
);
2608 scratch
= inb(cap
+ UART_IIR
);
2611 brd
->uart_type
= PORT_16550A
;
2613 brd
->uart_type
= PORT_16450
;
2614 if (!request_region(brd
->ports
[0].ioaddr
, 8 * brd
->info
->nports
,
2616 printk(KERN_ERR
"mxser: can't request ports I/O region: "
2617 "0x%.8lx-0x%.8lx\n",
2618 brd
->ports
[0].ioaddr
, brd
->ports
[0].ioaddr
+
2619 8 * brd
->info
->nports
- 1);
2622 if (!request_region(brd
->vector
, 1, "mxser(vector)")) {
2623 release_region(brd
->ports
[0].ioaddr
, 8 * brd
->info
->nports
);
2624 printk(KERN_ERR
"mxser: can't request interrupt vector region: "
2625 "0x%.8lx-0x%.8lx\n",
2626 brd
->ports
[0].ioaddr
, brd
->ports
[0].ioaddr
+
2627 8 * brd
->info
->nports
- 1);
2630 return brd
->info
->nports
;
2633 printk(KERN_ERR
"mxser: invalid interrupt number\n");
2637 static int __devinit
mxser_probe(struct pci_dev
*pdev
,
2638 const struct pci_device_id
*ent
)
2641 struct mxser_board
*brd
;
2643 unsigned long ioaddress
;
2644 int retval
= -EINVAL
;
2646 for (i
= 0; i
< MXSER_BOARDS
; i
++)
2647 if (mxser_boards
[i
].info
== NULL
)
2650 if (i
>= MXSER_BOARDS
) {
2651 dev_err(&pdev
->dev
, "too many boards found (maximum %d), board "
2652 "not configured\n", MXSER_BOARDS
);
2656 brd
= &mxser_boards
[i
];
2657 brd
->idx
= i
* MXSER_PORTS_PER_BOARD
;
2658 dev_info(&pdev
->dev
, "found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2659 mxser_cards
[ent
->driver_data
].name
,
2660 pdev
->bus
->number
, PCI_SLOT(pdev
->devfn
));
2662 retval
= pci_enable_device(pdev
);
2664 dev_err(&pdev
->dev
, "PCI enable failed\n");
2669 ioaddress
= pci_resource_start(pdev
, 2);
2670 retval
= pci_request_region(pdev
, 2, "mxser(IO)");
2674 brd
->info
= &mxser_cards
[ent
->driver_data
];
2675 for (i
= 0; i
< brd
->info
->nports
; i
++)
2676 brd
->ports
[i
].ioaddr
= ioaddress
+ 8 * i
;
2679 ioaddress
= pci_resource_start(pdev
, 3);
2680 retval
= pci_request_region(pdev
, 3, "mxser(vector)");
2683 brd
->vector
= ioaddress
;
2686 brd
->irq
= pdev
->irq
;
2688 brd
->chip_flag
= CheckIsMoxaMust(brd
->ports
[0].ioaddr
);
2689 brd
->uart_type
= PORT_16550A
;
2690 brd
->vector_mask
= 0;
2692 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2693 for (j
= 0; j
< UART_INFO_NUM
; j
++) {
2694 if (Gpci_uart_info
[j
].type
== brd
->chip_flag
) {
2695 brd
->ports
[i
].max_baud
=
2696 Gpci_uart_info
[j
].max_baud
;
2698 /* exception....CP-102 */
2699 if (brd
->info
->flags
& MXSER_HIGHBAUD
)
2700 brd
->ports
[i
].max_baud
= 921600;
2706 if (brd
->chip_flag
== MOXA_MUST_MU860_HWID
) {
2707 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2709 brd
->ports
[i
].opmode_ioaddr
= ioaddress
+ 4;
2711 brd
->ports
[i
].opmode_ioaddr
= ioaddress
+ 0x0c;
2713 outb(0, ioaddress
+ 4); /* default set to RS232 mode */
2714 outb(0, ioaddress
+ 0x0c); /* default set to RS232 mode */
2717 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2718 brd
->vector_mask
|= (1 << i
);
2719 brd
->ports
[i
].baud_base
= 921600;
2722 /* mxser_initbrd will hook ISR. */
2723 retval
= mxser_initbrd(brd
, pdev
);
2727 for (i
= 0; i
< brd
->info
->nports
; i
++)
2728 tty_register_device(mxvar_sdriver
, brd
->idx
+ i
, &pdev
->dev
);
2730 pci_set_drvdata(pdev
, brd
);
2734 pci_release_region(pdev
, 2);
2744 static void __devexit
mxser_remove(struct pci_dev
*pdev
)
2746 struct mxser_board
*brd
= pci_get_drvdata(pdev
);
2749 for (i
= 0; i
< brd
->info
->nports
; i
++)
2750 tty_unregister_device(mxvar_sdriver
, brd
->idx
+ i
);
2752 mxser_release_res(brd
, pdev
, 1);
2756 static struct pci_driver mxser_driver
= {
2758 .id_table
= mxser_pcibrds
,
2759 .probe
= mxser_probe
,
2760 .remove
= __devexit_p(mxser_remove
)
2763 static int __init
mxser_module_init(void)
2765 struct mxser_board
*brd
;
2767 unsigned int i
, m
, isaloop
;
2770 pr_debug("Loading module mxser ...\n");
2772 mxvar_sdriver
= alloc_tty_driver(MXSER_PORTS
+ 1);
2776 printk(KERN_INFO
"MOXA Smartio/Industio family driver version %s\n",
2779 /* Initialize the tty_driver structure */
2780 mxvar_sdriver
->owner
= THIS_MODULE
;
2781 mxvar_sdriver
->magic
= TTY_DRIVER_MAGIC
;
2782 mxvar_sdriver
->name
= "ttyMI";
2783 mxvar_sdriver
->major
= ttymajor
;
2784 mxvar_sdriver
->minor_start
= 0;
2785 mxvar_sdriver
->num
= MXSER_PORTS
+ 1;
2786 mxvar_sdriver
->type
= TTY_DRIVER_TYPE_SERIAL
;
2787 mxvar_sdriver
->subtype
= SERIAL_TYPE_NORMAL
;
2788 mxvar_sdriver
->init_termios
= tty_std_termios
;
2789 mxvar_sdriver
->init_termios
.c_cflag
= B9600
|CS8
|CREAD
|HUPCL
|CLOCAL
;
2790 mxvar_sdriver
->flags
= TTY_DRIVER_REAL_RAW
|TTY_DRIVER_DYNAMIC_DEV
;
2791 tty_set_operations(mxvar_sdriver
, &mxser_ops
);
2793 retval
= tty_register_driver(mxvar_sdriver
);
2795 printk(KERN_ERR
"Couldn't install MOXA Smartio/Industio family "
2801 /* Start finding ISA boards here */
2802 for (isaloop
= 0; isaloop
< 2; isaloop
++)
2803 for (b
= 0; b
< MXSER_BOARDS
&& m
< MXSER_BOARDS
; b
++) {
2805 cap
= mxserBoardCAP
[b
]; /* predefined */
2807 cap
= ioaddr
[b
]; /* module param */
2812 brd
= &mxser_boards
[m
];
2813 retval
= mxser_get_ISA_conf(cap
, brd
);
2819 printk(KERN_INFO
"mxser: found MOXA %s board "
2820 "(CAP=0x%x)\n", brd
->info
->name
, ioaddr
[b
]);
2822 /* mxser_initbrd will hook ISR. */
2823 if (mxser_initbrd(brd
, NULL
) < 0) {
2828 brd
->idx
= m
* MXSER_PORTS_PER_BOARD
;
2829 for (i
= 0; i
< brd
->info
->nports
; i
++)
2830 tty_register_device(mxvar_sdriver
, brd
->idx
+ i
,
2836 retval
= pci_register_driver(&mxser_driver
);
2838 printk(KERN_ERR
"mxser: can't register pci driver\n");
2842 } /* else: we have some ISA cards under control */
2845 pr_debug("Done.\n");
2849 tty_unregister_driver(mxvar_sdriver
);
2851 put_tty_driver(mxvar_sdriver
);
2855 static void __exit
mxser_module_exit(void)
2859 pr_debug("Unloading module mxser ...\n");
2861 pci_unregister_driver(&mxser_driver
);
2863 for (i
= 0; i
< MXSER_BOARDS
; i
++) /* ISA remains */
2864 if (mxser_boards
[i
].info
!= NULL
)
2865 for (j
= 0; j
< mxser_boards
[i
].info
->nports
; j
++)
2866 tty_unregister_device(mxvar_sdriver
,
2867 mxser_boards
[i
].idx
+ j
);
2868 tty_unregister_driver(mxvar_sdriver
);
2869 put_tty_driver(mxvar_sdriver
);
2871 for (i
= 0; i
< MXSER_BOARDS
; i
++)
2872 if (mxser_boards
[i
].info
!= NULL
)
2873 mxser_release_res(&mxser_boards
[i
], NULL
, 1);
2875 pr_debug("Done.\n");
2878 module_init(mxser_module_init
);
2879 module_exit(mxser_module_exit
);