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 tty_port port
;
226 struct mxser_board
*board
;
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 */
238 int x_char
; /* xon/xoff character */
239 int IER
; /* Interrupt Enable Register */
240 int MCR
; /* Modem control register */
242 unsigned char stop_rx
;
243 unsigned char ldisc_stop_rx
;
246 unsigned char err_shadow
;
248 struct async_icount icount
; /* kernel counters for 4 input interrupts */
251 int read_status_mask
;
252 int ignore_status_mask
;
258 struct ktermios normal_termios
;
260 struct mxser_mon mon_data
;
263 wait_queue_head_t delta_msr_wait
;
269 const struct mxser_cardinfo
*info
;
270 unsigned long vector
;
271 unsigned long vector_mask
;
276 struct mxser_port ports
[MXSER_PORTS_PER_BOARD
];
279 struct mxser_mstatus
{
287 static struct mxser_mstatus GMStatus
[MXSER_PORTS
];
289 static int mxserBoardCAP
[MXSER_BOARDS
] = {
291 /* 0x180, 0x280, 0x200, 0x320 */
294 static struct mxser_board mxser_boards
[MXSER_BOARDS
];
295 static struct tty_driver
*mxvar_sdriver
;
296 static struct mxser_log mxvar_log
;
297 static int mxvar_diagflag
;
298 static unsigned char mxser_msr
[MXSER_PORTS
+ 1];
299 static struct mxser_mon_ext mon_data_ext
;
300 static int mxser_set_baud_method
[MXSER_PORTS
+ 1];
302 static void mxser_enable_must_enchance_mode(unsigned long baseio
)
307 oldlcr
= inb(baseio
+ UART_LCR
);
308 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
310 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
311 efr
|= MOXA_MUST_EFR_EFRB_ENABLE
;
313 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
314 outb(oldlcr
, baseio
+ UART_LCR
);
317 static void mxser_disable_must_enchance_mode(unsigned long baseio
)
322 oldlcr
= inb(baseio
+ UART_LCR
);
323 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
325 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
326 efr
&= ~MOXA_MUST_EFR_EFRB_ENABLE
;
328 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
329 outb(oldlcr
, baseio
+ UART_LCR
);
332 static void mxser_set_must_xon1_value(unsigned long baseio
, u8 value
)
337 oldlcr
= inb(baseio
+ UART_LCR
);
338 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
340 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
341 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
342 efr
|= MOXA_MUST_EFR_BANK0
;
344 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
345 outb(value
, baseio
+ MOXA_MUST_XON1_REGISTER
);
346 outb(oldlcr
, baseio
+ UART_LCR
);
349 static void mxser_set_must_xoff1_value(unsigned long baseio
, u8 value
)
354 oldlcr
= inb(baseio
+ UART_LCR
);
355 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
357 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
358 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
359 efr
|= MOXA_MUST_EFR_BANK0
;
361 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
362 outb(value
, baseio
+ MOXA_MUST_XOFF1_REGISTER
);
363 outb(oldlcr
, baseio
+ UART_LCR
);
366 static void mxser_set_must_fifo_value(struct mxser_port
*info
)
371 oldlcr
= inb(info
->ioaddr
+ UART_LCR
);
372 outb(MOXA_MUST_ENTER_ENCHANCE
, info
->ioaddr
+ UART_LCR
);
374 efr
= inb(info
->ioaddr
+ MOXA_MUST_EFR_REGISTER
);
375 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
376 efr
|= MOXA_MUST_EFR_BANK1
;
378 outb(efr
, info
->ioaddr
+ MOXA_MUST_EFR_REGISTER
);
379 outb((u8
)info
->rx_high_water
, info
->ioaddr
+ MOXA_MUST_RBRTH_REGISTER
);
380 outb((u8
)info
->rx_trigger
, info
->ioaddr
+ MOXA_MUST_RBRTI_REGISTER
);
381 outb((u8
)info
->rx_low_water
, info
->ioaddr
+ MOXA_MUST_RBRTL_REGISTER
);
382 outb(oldlcr
, info
->ioaddr
+ UART_LCR
);
385 static void mxser_set_must_enum_value(unsigned long baseio
, u8 value
)
390 oldlcr
= inb(baseio
+ UART_LCR
);
391 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
393 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
394 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
395 efr
|= MOXA_MUST_EFR_BANK2
;
397 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
398 outb(value
, baseio
+ MOXA_MUST_ENUM_REGISTER
);
399 outb(oldlcr
, baseio
+ UART_LCR
);
402 static void mxser_get_must_hardware_id(unsigned long baseio
, u8
*pId
)
407 oldlcr
= inb(baseio
+ UART_LCR
);
408 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
410 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
411 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
412 efr
|= MOXA_MUST_EFR_BANK2
;
414 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
415 *pId
= inb(baseio
+ MOXA_MUST_HWID_REGISTER
);
416 outb(oldlcr
, baseio
+ UART_LCR
);
419 static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio
)
424 oldlcr
= inb(baseio
+ UART_LCR
);
425 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
427 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
428 efr
&= ~MOXA_MUST_EFR_SF_MASK
;
430 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
431 outb(oldlcr
, baseio
+ UART_LCR
);
434 static void mxser_enable_must_tx_software_flow_control(unsigned long baseio
)
439 oldlcr
= inb(baseio
+ UART_LCR
);
440 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
442 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
443 efr
&= ~MOXA_MUST_EFR_SF_TX_MASK
;
444 efr
|= MOXA_MUST_EFR_SF_TX1
;
446 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
447 outb(oldlcr
, baseio
+ UART_LCR
);
450 static void mxser_disable_must_tx_software_flow_control(unsigned long baseio
)
455 oldlcr
= inb(baseio
+ UART_LCR
);
456 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
458 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
459 efr
&= ~MOXA_MUST_EFR_SF_TX_MASK
;
461 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
462 outb(oldlcr
, baseio
+ UART_LCR
);
465 static void mxser_enable_must_rx_software_flow_control(unsigned long baseio
)
470 oldlcr
= inb(baseio
+ UART_LCR
);
471 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
473 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
474 efr
&= ~MOXA_MUST_EFR_SF_RX_MASK
;
475 efr
|= MOXA_MUST_EFR_SF_RX1
;
477 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
478 outb(oldlcr
, baseio
+ UART_LCR
);
481 static void mxser_disable_must_rx_software_flow_control(unsigned long baseio
)
486 oldlcr
= inb(baseio
+ UART_LCR
);
487 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
489 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
490 efr
&= ~MOXA_MUST_EFR_SF_RX_MASK
;
492 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
493 outb(oldlcr
, baseio
+ UART_LCR
);
497 static int __devinit
CheckIsMoxaMust(unsigned long io
)
502 outb(0, io
+ UART_LCR
);
503 mxser_disable_must_enchance_mode(io
);
504 oldmcr
= inb(io
+ UART_MCR
);
505 outb(0, io
+ UART_MCR
);
506 mxser_set_must_xon1_value(io
, 0x11);
507 if ((hwid
= inb(io
+ UART_MCR
)) != 0) {
508 outb(oldmcr
, io
+ UART_MCR
);
509 return MOXA_OTHER_UART
;
512 mxser_get_must_hardware_id(io
, &hwid
);
513 for (i
= 1; i
< UART_INFO_NUM
; i
++) { /* 0 = OTHER_UART */
514 if (hwid
== Gpci_uart_info
[i
].type
)
517 return MOXA_OTHER_UART
;
521 static void process_txrx_fifo(struct mxser_port
*info
)
525 if ((info
->type
== PORT_16450
) || (info
->type
== PORT_8250
)) {
526 info
->rx_trigger
= 1;
527 info
->rx_high_water
= 1;
528 info
->rx_low_water
= 1;
529 info
->xmit_fifo_size
= 1;
531 for (i
= 0; i
< UART_INFO_NUM
; i
++)
532 if (info
->board
->chip_flag
== Gpci_uart_info
[i
].type
) {
533 info
->rx_trigger
= Gpci_uart_info
[i
].rx_trigger
;
534 info
->rx_low_water
= Gpci_uart_info
[i
].rx_low_water
;
535 info
->rx_high_water
= Gpci_uart_info
[i
].rx_high_water
;
536 info
->xmit_fifo_size
= Gpci_uart_info
[i
].xmit_fifo_size
;
541 static unsigned char mxser_get_msr(int baseaddr
, int mode
, int port
)
543 unsigned char status
= 0;
545 status
= inb(baseaddr
+ UART_MSR
);
547 mxser_msr
[port
] &= 0x0F;
548 mxser_msr
[port
] |= status
;
549 status
= mxser_msr
[port
];
556 static int mxser_block_til_ready(struct tty_struct
*tty
, struct file
*filp
,
557 struct mxser_port
*port
)
559 DECLARE_WAITQUEUE(wait
, current
);
565 * If non-blocking mode is set, or the port is not enabled,
566 * then make the check up front and then exit.
568 if ((filp
->f_flags
& O_NONBLOCK
) ||
569 test_bit(TTY_IO_ERROR
, &tty
->flags
)) {
570 port
->port
.flags
|= ASYNC_NORMAL_ACTIVE
;
574 if (tty
->termios
->c_cflag
& CLOCAL
)
578 * Block waiting for the carrier detect and the line to become
579 * free (i.e., not in use by the callout). While we are in
580 * this loop, port->port.count is dropped by one, so that
581 * mxser_close() knows when to free things. We restore it upon
582 * exit, either normal or abnormal.
585 add_wait_queue(&port
->port
.open_wait
, &wait
);
587 spin_lock_irqsave(&port
->slock
, flags
);
588 if (!tty_hung_up_p(filp
))
590 spin_unlock_irqrestore(&port
->slock
, flags
);
591 port
->port
.blocked_open
++;
593 spin_lock_irqsave(&port
->slock
, flags
);
594 outb(inb(port
->ioaddr
+ UART_MCR
) |
595 UART_MCR_DTR
| UART_MCR_RTS
, port
->ioaddr
+ UART_MCR
);
596 spin_unlock_irqrestore(&port
->slock
, flags
);
597 set_current_state(TASK_INTERRUPTIBLE
);
598 if (tty_hung_up_p(filp
) || !(port
->port
.flags
& ASYNC_INITIALIZED
)) {
599 if (port
->port
.flags
& ASYNC_HUP_NOTIFY
)
602 retval
= -ERESTARTSYS
;
605 if (!(port
->port
.flags
& ASYNC_CLOSING
) &&
607 (inb(port
->ioaddr
+ UART_MSR
) & UART_MSR_DCD
)))
609 if (signal_pending(current
)) {
610 retval
= -ERESTARTSYS
;
615 set_current_state(TASK_RUNNING
);
616 remove_wait_queue(&port
->port
.open_wait
, &wait
);
617 if (!tty_hung_up_p(filp
))
619 port
->port
.blocked_open
--;
622 port
->port
.flags
|= ASYNC_NORMAL_ACTIVE
;
626 static int mxser_set_baud(struct mxser_port
*info
, long newspd
)
631 if (!info
->port
.tty
|| !info
->port
.tty
->termios
)
637 if (newspd
> info
->max_baud
)
641 quot
= 2 * info
->baud_base
/ 269;
642 tty_encode_baud_rate(info
->port
.tty
, 134, 134);
644 quot
= info
->baud_base
/ newspd
;
647 baud
= info
->baud_base
/quot
;
648 tty_encode_baud_rate(info
->port
.tty
, baud
, baud
);
653 info
->timeout
= ((info
->xmit_fifo_size
* HZ
* 10 * quot
) / info
->baud_base
);
654 info
->timeout
+= HZ
/ 50; /* Add .02 seconds of slop */
657 info
->MCR
|= UART_MCR_DTR
;
658 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
660 info
->MCR
&= ~UART_MCR_DTR
;
661 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
665 cval
= inb(info
->ioaddr
+ UART_LCR
);
667 outb(cval
| UART_LCR_DLAB
, info
->ioaddr
+ UART_LCR
); /* set DLAB */
669 outb(quot
& 0xff, info
->ioaddr
+ UART_DLL
); /* LS of divisor */
670 outb(quot
>> 8, info
->ioaddr
+ UART_DLM
); /* MS of divisor */
671 outb(cval
, info
->ioaddr
+ UART_LCR
); /* reset DLAB */
674 if (C_BAUD(info
->port
.tty
) == BOTHER
) {
675 quot
= info
->baud_base
% newspd
;
677 if (quot
% newspd
> newspd
/ 2) {
683 mxser_set_must_enum_value(info
->ioaddr
, quot
);
686 mxser_set_must_enum_value(info
->ioaddr
, 0);
692 * This routine is called to set the UART divisor registers to match
693 * the specified baud rate for a serial port.
695 static int mxser_change_speed(struct mxser_port
*info
,
696 struct ktermios
*old_termios
)
698 unsigned cflag
, cval
, fcr
;
700 unsigned char status
;
702 if (!info
->port
.tty
|| !info
->port
.tty
->termios
)
704 cflag
= info
->port
.tty
->termios
->c_cflag
;
708 if (mxser_set_baud_method
[info
->port
.tty
->index
] == 0)
709 mxser_set_baud(info
, tty_get_baud_rate(info
->port
.tty
));
711 /* byte size and parity */
712 switch (cflag
& CSIZE
) {
727 break; /* too keep GCC shut... */
732 cval
|= UART_LCR_PARITY
;
733 if (!(cflag
& PARODD
))
734 cval
|= UART_LCR_EPAR
;
736 cval
|= UART_LCR_SPAR
;
738 if ((info
->type
== PORT_8250
) || (info
->type
== PORT_16450
)) {
739 if (info
->board
->chip_flag
) {
740 fcr
= UART_FCR_ENABLE_FIFO
;
741 fcr
|= MOXA_MUST_FCR_GDA_MODE_ENABLE
;
742 mxser_set_must_fifo_value(info
);
746 fcr
= UART_FCR_ENABLE_FIFO
;
747 if (info
->board
->chip_flag
) {
748 fcr
|= MOXA_MUST_FCR_GDA_MODE_ENABLE
;
749 mxser_set_must_fifo_value(info
);
751 switch (info
->rx_trigger
) {
753 fcr
|= UART_FCR_TRIGGER_1
;
756 fcr
|= UART_FCR_TRIGGER_4
;
759 fcr
|= UART_FCR_TRIGGER_8
;
762 fcr
|= UART_FCR_TRIGGER_14
;
768 /* CTS flow control flag and modem status interrupts */
769 info
->IER
&= ~UART_IER_MSI
;
770 info
->MCR
&= ~UART_MCR_AFE
;
771 if (cflag
& CRTSCTS
) {
772 info
->port
.flags
|= ASYNC_CTS_FLOW
;
773 info
->IER
|= UART_IER_MSI
;
774 if ((info
->type
== PORT_16550A
) || (info
->board
->chip_flag
)) {
775 info
->MCR
|= UART_MCR_AFE
;
777 status
= inb(info
->ioaddr
+ UART_MSR
);
778 if (info
->port
.tty
->hw_stopped
) {
779 if (status
& UART_MSR_CTS
) {
780 info
->port
.tty
->hw_stopped
= 0;
781 if (info
->type
!= PORT_16550A
&&
782 !info
->board
->chip_flag
) {
783 outb(info
->IER
& ~UART_IER_THRI
,
786 info
->IER
|= UART_IER_THRI
;
787 outb(info
->IER
, info
->ioaddr
+
790 tty_wakeup(info
->port
.tty
);
793 if (!(status
& UART_MSR_CTS
)) {
794 info
->port
.tty
->hw_stopped
= 1;
795 if ((info
->type
!= PORT_16550A
) &&
796 (!info
->board
->chip_flag
)) {
797 info
->IER
&= ~UART_IER_THRI
;
798 outb(info
->IER
, info
->ioaddr
+
805 info
->port
.flags
&= ~ASYNC_CTS_FLOW
;
807 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
808 if (cflag
& CLOCAL
) {
809 info
->port
.flags
&= ~ASYNC_CHECK_CD
;
811 info
->port
.flags
|= ASYNC_CHECK_CD
;
812 info
->IER
|= UART_IER_MSI
;
814 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
817 * Set up parity check flag
819 info
->read_status_mask
= UART_LSR_OE
| UART_LSR_THRE
| UART_LSR_DR
;
820 if (I_INPCK(info
->port
.tty
))
821 info
->read_status_mask
|= UART_LSR_FE
| UART_LSR_PE
;
822 if (I_BRKINT(info
->port
.tty
) || I_PARMRK(info
->port
.tty
))
823 info
->read_status_mask
|= UART_LSR_BI
;
825 info
->ignore_status_mask
= 0;
827 if (I_IGNBRK(info
->port
.tty
)) {
828 info
->ignore_status_mask
|= UART_LSR_BI
;
829 info
->read_status_mask
|= UART_LSR_BI
;
831 * If we're ignore parity and break indicators, ignore
832 * overruns too. (For real raw support).
834 if (I_IGNPAR(info
->port
.tty
)) {
835 info
->ignore_status_mask
|=
839 info
->read_status_mask
|=
845 if (info
->board
->chip_flag
) {
846 mxser_set_must_xon1_value(info
->ioaddr
, START_CHAR(info
->port
.tty
));
847 mxser_set_must_xoff1_value(info
->ioaddr
, STOP_CHAR(info
->port
.tty
));
848 if (I_IXON(info
->port
.tty
)) {
849 mxser_enable_must_rx_software_flow_control(
852 mxser_disable_must_rx_software_flow_control(
855 if (I_IXOFF(info
->port
.tty
)) {
856 mxser_enable_must_tx_software_flow_control(
859 mxser_disable_must_tx_software_flow_control(
865 outb(fcr
, info
->ioaddr
+ UART_FCR
); /* set fcr */
866 outb(cval
, info
->ioaddr
+ UART_LCR
);
871 static void mxser_check_modem_status(struct mxser_port
*port
, int status
)
873 /* update input line counters */
874 if (status
& UART_MSR_TERI
)
876 if (status
& UART_MSR_DDSR
)
878 if (status
& UART_MSR_DDCD
)
880 if (status
& UART_MSR_DCTS
)
882 port
->mon_data
.modem_status
= status
;
883 wake_up_interruptible(&port
->delta_msr_wait
);
885 if ((port
->port
.flags
& ASYNC_CHECK_CD
) && (status
& UART_MSR_DDCD
)) {
886 if (status
& UART_MSR_DCD
)
887 wake_up_interruptible(&port
->port
.open_wait
);
890 if (port
->port
.flags
& ASYNC_CTS_FLOW
) {
891 if (port
->port
.tty
->hw_stopped
) {
892 if (status
& UART_MSR_CTS
) {
893 port
->port
.tty
->hw_stopped
= 0;
895 if ((port
->type
!= PORT_16550A
) &&
896 (!port
->board
->chip_flag
)) {
897 outb(port
->IER
& ~UART_IER_THRI
,
898 port
->ioaddr
+ UART_IER
);
899 port
->IER
|= UART_IER_THRI
;
900 outb(port
->IER
, port
->ioaddr
+
903 tty_wakeup(port
->port
.tty
);
906 if (!(status
& UART_MSR_CTS
)) {
907 port
->port
.tty
->hw_stopped
= 1;
908 if (port
->type
!= PORT_16550A
&&
909 !port
->board
->chip_flag
) {
910 port
->IER
&= ~UART_IER_THRI
;
911 outb(port
->IER
, port
->ioaddr
+
919 static int mxser_startup(struct mxser_port
*info
)
924 page
= __get_free_page(GFP_KERNEL
);
928 spin_lock_irqsave(&info
->slock
, flags
);
930 if (info
->port
.flags
& ASYNC_INITIALIZED
) {
932 spin_unlock_irqrestore(&info
->slock
, flags
);
936 if (!info
->ioaddr
|| !info
->type
) {
938 set_bit(TTY_IO_ERROR
, &info
->port
.tty
->flags
);
940 spin_unlock_irqrestore(&info
->slock
, flags
);
943 if (info
->port
.xmit_buf
)
946 info
->port
.xmit_buf
= (unsigned char *) page
;
949 * Clear the FIFO buffers and disable them
950 * (they will be reenabled in mxser_change_speed())
952 if (info
->board
->chip_flag
)
953 outb((UART_FCR_CLEAR_RCVR
|
954 UART_FCR_CLEAR_XMIT
|
955 MOXA_MUST_FCR_GDA_MODE_ENABLE
), info
->ioaddr
+ UART_FCR
);
957 outb((UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
),
958 info
->ioaddr
+ UART_FCR
);
961 * At this point there's no way the LSR could still be 0xFF;
962 * if it is, then bail out, because there's likely no UART
965 if (inb(info
->ioaddr
+ UART_LSR
) == 0xff) {
966 spin_unlock_irqrestore(&info
->slock
, flags
);
967 if (capable(CAP_SYS_ADMIN
)) {
969 set_bit(TTY_IO_ERROR
, &info
->port
.tty
->flags
);
976 * Clear the interrupt registers.
978 (void) inb(info
->ioaddr
+ UART_LSR
);
979 (void) inb(info
->ioaddr
+ UART_RX
);
980 (void) inb(info
->ioaddr
+ UART_IIR
);
981 (void) inb(info
->ioaddr
+ UART_MSR
);
984 * Now, initialize the UART
986 outb(UART_LCR_WLEN8
, info
->ioaddr
+ UART_LCR
); /* reset DLAB */
987 info
->MCR
= UART_MCR_DTR
| UART_MCR_RTS
;
988 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
991 * Finally, enable interrupts
993 info
->IER
= UART_IER_MSI
| UART_IER_RLSI
| UART_IER_RDI
;
995 if (info
->board
->chip_flag
)
996 info
->IER
|= MOXA_MUST_IER_EGDAI
;
997 outb(info
->IER
, info
->ioaddr
+ UART_IER
); /* enable interrupts */
1000 * And clear the interrupt registers again for luck.
1002 (void) inb(info
->ioaddr
+ UART_LSR
);
1003 (void) inb(info
->ioaddr
+ UART_RX
);
1004 (void) inb(info
->ioaddr
+ UART_IIR
);
1005 (void) inb(info
->ioaddr
+ UART_MSR
);
1008 clear_bit(TTY_IO_ERROR
, &info
->port
.tty
->flags
);
1009 info
->xmit_cnt
= info
->xmit_head
= info
->xmit_tail
= 0;
1012 * and set the speed of the serial port
1014 mxser_change_speed(info
, NULL
);
1015 info
->port
.flags
|= ASYNC_INITIALIZED
;
1016 spin_unlock_irqrestore(&info
->slock
, flags
);
1022 * This routine will shutdown a serial port; interrupts maybe disabled, and
1023 * DTR is dropped if the hangup on close termio flag is on.
1025 static void mxser_shutdown(struct mxser_port
*info
)
1027 unsigned long flags
;
1029 if (!(info
->port
.flags
& ASYNC_INITIALIZED
))
1032 spin_lock_irqsave(&info
->slock
, flags
);
1035 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
1036 * here so the queue might never be waken up
1038 wake_up_interruptible(&info
->delta_msr_wait
);
1041 * Free the IRQ, if necessary
1043 if (info
->port
.xmit_buf
) {
1044 free_page((unsigned long) info
->port
.xmit_buf
);
1045 info
->port
.xmit_buf
= NULL
;
1049 outb(0x00, info
->ioaddr
+ UART_IER
);
1051 if (!info
->port
.tty
|| (info
->port
.tty
->termios
->c_cflag
& HUPCL
))
1052 info
->MCR
&= ~(UART_MCR_DTR
| UART_MCR_RTS
);
1053 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
1055 /* clear Rx/Tx FIFO's */
1056 if (info
->board
->chip_flag
)
1057 outb(UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
|
1058 MOXA_MUST_FCR_GDA_MODE_ENABLE
,
1059 info
->ioaddr
+ UART_FCR
);
1061 outb(UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
,
1062 info
->ioaddr
+ UART_FCR
);
1064 /* read data port to reset things */
1065 (void) inb(info
->ioaddr
+ UART_RX
);
1068 set_bit(TTY_IO_ERROR
, &info
->port
.tty
->flags
);
1070 info
->port
.flags
&= ~ASYNC_INITIALIZED
;
1072 if (info
->board
->chip_flag
)
1073 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info
->ioaddr
);
1075 spin_unlock_irqrestore(&info
->slock
, flags
);
1079 * This routine is called whenever a serial port is opened. It
1080 * enables interrupts for a serial port, linking in its async structure into
1081 * the IRQ chain. It also performs the serial-specific
1082 * initialization for the tty structure.
1084 static int mxser_open(struct tty_struct
*tty
, struct file
*filp
)
1086 struct mxser_port
*info
;
1087 unsigned long flags
;
1091 if (line
== MXSER_PORTS
)
1093 if (line
< 0 || line
> MXSER_PORTS
)
1095 info
= &mxser_boards
[line
/ MXSER_PORTS_PER_BOARD
].ports
[line
% MXSER_PORTS_PER_BOARD
];
1099 tty
->driver_data
= info
;
1100 info
->port
.tty
= tty
;
1102 * Start up serial port
1104 spin_lock_irqsave(&info
->slock
, flags
);
1106 spin_unlock_irqrestore(&info
->slock
, flags
);
1107 retval
= mxser_startup(info
);
1111 retval
= mxser_block_til_ready(tty
, filp
, info
);
1115 /* unmark here for very high baud rate (ex. 921600 bps) used */
1116 tty
->low_latency
= 1;
1120 static void mxser_flush_buffer(struct tty_struct
*tty
)
1122 struct mxser_port
*info
= tty
->driver_data
;
1124 unsigned long flags
;
1127 spin_lock_irqsave(&info
->slock
, flags
);
1128 info
->xmit_cnt
= info
->xmit_head
= info
->xmit_tail
= 0;
1130 fcr
= inb(info
->ioaddr
+ UART_FCR
);
1131 outb((fcr
| UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
),
1132 info
->ioaddr
+ UART_FCR
);
1133 outb(fcr
, info
->ioaddr
+ UART_FCR
);
1135 spin_unlock_irqrestore(&info
->slock
, flags
);
1142 * This routine is called when the serial port gets closed. First, we
1143 * wait for the last remaining data to be sent. Then, we unlink its
1144 * async structure from the interrupt chain if necessary, and we free
1145 * that IRQ if nothing is left in the chain.
1147 static void mxser_close(struct tty_struct
*tty
, struct file
*filp
)
1149 struct mxser_port
*info
= tty
->driver_data
;
1151 unsigned long timeout
;
1152 unsigned long flags
;
1154 if (tty
->index
== MXSER_PORTS
)
1159 spin_lock_irqsave(&info
->slock
, flags
);
1161 if (tty_hung_up_p(filp
)) {
1162 spin_unlock_irqrestore(&info
->slock
, flags
);
1165 if ((tty
->count
== 1) && (info
->port
.count
!= 1)) {
1167 * Uh, oh. tty->count is 1, which means that the tty
1168 * structure will be freed. Info->port.count should always
1169 * be one in these conditions. If it's greater than
1170 * one, we've got real problems, since it means the
1171 * serial port won't be shutdown.
1173 printk(KERN_ERR
"mxser_close: bad serial port count; "
1174 "tty->count is 1, info->port.count is %d\n", info
->port
.count
);
1175 info
->port
.count
= 1;
1177 if (--info
->port
.count
< 0) {
1178 printk(KERN_ERR
"mxser_close: bad serial port count for "
1179 "ttys%d: %d\n", tty
->index
, info
->port
.count
);
1180 info
->port
.count
= 0;
1182 if (info
->port
.count
) {
1183 spin_unlock_irqrestore(&info
->slock
, flags
);
1186 info
->port
.flags
|= ASYNC_CLOSING
;
1187 spin_unlock_irqrestore(&info
->slock
, flags
);
1189 * Save the termios structure, since this port may have
1190 * separate termios for callout and dialin.
1192 if (info
->port
.flags
& ASYNC_NORMAL_ACTIVE
)
1193 info
->normal_termios
= *tty
->termios
;
1195 * Now we wait for the transmit buffer to clear; and we notify
1196 * the line discipline to only process XON/XOFF characters.
1199 if (info
->port
.closing_wait
!= ASYNC_CLOSING_WAIT_NONE
)
1200 tty_wait_until_sent(tty
, info
->port
.closing_wait
);
1202 * At this point we stop accepting input. To do this, we
1203 * disable the receive line status interrupts, and tell the
1204 * interrupt driver to stop checking the data ready bit in the
1205 * line status register.
1207 info
->IER
&= ~UART_IER_RLSI
;
1208 if (info
->board
->chip_flag
)
1209 info
->IER
&= ~MOXA_MUST_RECV_ISR
;
1211 if (info
->port
.flags
& ASYNC_INITIALIZED
) {
1212 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1214 * Before we drop DTR, make sure the UART transmitter
1215 * has completely drained; this is especially
1216 * important if there is a transmit FIFO!
1218 timeout
= jiffies
+ HZ
;
1219 while (!(inb(info
->ioaddr
+ UART_LSR
) & UART_LSR_TEMT
)) {
1220 schedule_timeout_interruptible(5);
1221 if (time_after(jiffies
, timeout
))
1225 mxser_shutdown(info
);
1227 mxser_flush_buffer(tty
);
1228 tty_ldisc_flush(tty
);
1231 info
->port
.tty
= NULL
;
1232 if (info
->port
.blocked_open
) {
1233 if (info
->port
.close_delay
)
1234 schedule_timeout_interruptible(info
->port
.close_delay
);
1235 wake_up_interruptible(&info
->port
.open_wait
);
1238 info
->port
.flags
&= ~(ASYNC_NORMAL_ACTIVE
| ASYNC_CLOSING
);
1241 static int mxser_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
1244 struct mxser_port
*info
= tty
->driver_data
;
1245 unsigned long flags
;
1247 if (!info
->port
.xmit_buf
)
1251 c
= min_t(int, count
, min(SERIAL_XMIT_SIZE
- info
->xmit_cnt
- 1,
1252 SERIAL_XMIT_SIZE
- info
->xmit_head
));
1256 memcpy(info
->port
.xmit_buf
+ info
->xmit_head
, buf
, c
);
1257 spin_lock_irqsave(&info
->slock
, flags
);
1258 info
->xmit_head
= (info
->xmit_head
+ c
) &
1259 (SERIAL_XMIT_SIZE
- 1);
1260 info
->xmit_cnt
+= c
;
1261 spin_unlock_irqrestore(&info
->slock
, flags
);
1268 if (info
->xmit_cnt
&& !tty
->stopped
) {
1269 if (!tty
->hw_stopped
||
1270 (info
->type
== PORT_16550A
) ||
1271 (info
->board
->chip_flag
)) {
1272 spin_lock_irqsave(&info
->slock
, flags
);
1273 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+
1275 info
->IER
|= UART_IER_THRI
;
1276 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1277 spin_unlock_irqrestore(&info
->slock
, flags
);
1283 static int mxser_put_char(struct tty_struct
*tty
, unsigned char ch
)
1285 struct mxser_port
*info
= tty
->driver_data
;
1286 unsigned long flags
;
1288 if (!info
->port
.xmit_buf
)
1291 if (info
->xmit_cnt
>= SERIAL_XMIT_SIZE
- 1)
1294 spin_lock_irqsave(&info
->slock
, flags
);
1295 info
->port
.xmit_buf
[info
->xmit_head
++] = ch
;
1296 info
->xmit_head
&= SERIAL_XMIT_SIZE
- 1;
1298 spin_unlock_irqrestore(&info
->slock
, flags
);
1299 if (!tty
->stopped
) {
1300 if (!tty
->hw_stopped
||
1301 (info
->type
== PORT_16550A
) ||
1302 info
->board
->chip_flag
) {
1303 spin_lock_irqsave(&info
->slock
, flags
);
1304 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
1305 info
->IER
|= UART_IER_THRI
;
1306 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1307 spin_unlock_irqrestore(&info
->slock
, flags
);
1314 static void mxser_flush_chars(struct tty_struct
*tty
)
1316 struct mxser_port
*info
= tty
->driver_data
;
1317 unsigned long flags
;
1319 if (info
->xmit_cnt
<= 0 ||
1321 !info
->port
.xmit_buf
||
1323 (info
->type
!= PORT_16550A
) &&
1324 (!info
->board
->chip_flag
)
1328 spin_lock_irqsave(&info
->slock
, flags
);
1330 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
1331 info
->IER
|= UART_IER_THRI
;
1332 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1334 spin_unlock_irqrestore(&info
->slock
, flags
);
1337 static int mxser_write_room(struct tty_struct
*tty
)
1339 struct mxser_port
*info
= tty
->driver_data
;
1342 ret
= SERIAL_XMIT_SIZE
- info
->xmit_cnt
- 1;
1348 static int mxser_chars_in_buffer(struct tty_struct
*tty
)
1350 struct mxser_port
*info
= tty
->driver_data
;
1351 return info
->xmit_cnt
;
1355 * ------------------------------------------------------------
1356 * friends of mxser_ioctl()
1357 * ------------------------------------------------------------
1359 static int mxser_get_serial_info(struct mxser_port
*info
,
1360 struct serial_struct __user
*retinfo
)
1362 struct serial_struct tmp
= {
1364 .line
= info
->port
.tty
->index
,
1365 .port
= info
->ioaddr
,
1366 .irq
= info
->board
->irq
,
1367 .flags
= info
->port
.flags
,
1368 .baud_base
= info
->baud_base
,
1369 .close_delay
= info
->port
.close_delay
,
1370 .closing_wait
= info
->port
.closing_wait
,
1371 .custom_divisor
= info
->custom_divisor
,
1374 if (copy_to_user(retinfo
, &tmp
, sizeof(*retinfo
)))
1379 static int mxser_set_serial_info(struct mxser_port
*info
,
1380 struct serial_struct __user
*new_info
)
1382 struct serial_struct new_serial
;
1384 unsigned long sl_flags
;
1388 if (!new_info
|| !info
->ioaddr
)
1390 if (copy_from_user(&new_serial
, new_info
, sizeof(new_serial
)))
1393 if (new_serial
.irq
!= info
->board
->irq
||
1394 new_serial
.port
!= info
->ioaddr
)
1397 flags
= info
->port
.flags
& ASYNC_SPD_MASK
;
1399 if (!capable(CAP_SYS_ADMIN
)) {
1400 if ((new_serial
.baud_base
!= info
->baud_base
) ||
1401 (new_serial
.close_delay
!= info
->port
.close_delay
) ||
1402 ((new_serial
.flags
& ~ASYNC_USR_MASK
) != (info
->port
.flags
& ~ASYNC_USR_MASK
)))
1404 info
->port
.flags
= ((info
->port
.flags
& ~ASYNC_USR_MASK
) |
1405 (new_serial
.flags
& ASYNC_USR_MASK
));
1408 * OK, past this point, all the error checking has been done.
1409 * At this point, we start making changes.....
1411 info
->port
.flags
= ((info
->port
.flags
& ~ASYNC_FLAGS
) |
1412 (new_serial
.flags
& ASYNC_FLAGS
));
1413 info
->port
.close_delay
= new_serial
.close_delay
* HZ
/ 100;
1414 info
->port
.closing_wait
= new_serial
.closing_wait
* HZ
/ 100;
1415 info
->port
.tty
->low_latency
=
1416 (info
->port
.flags
& ASYNC_LOW_LATENCY
) ? 1 : 0;
1417 info
->port
.tty
->low_latency
= 0;
1418 if ((info
->port
.flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_CUST
&&
1419 (new_serial
.baud_base
!= info
->baud_base
||
1420 new_serial
.custom_divisor
!=
1421 info
->custom_divisor
)) {
1422 baud
= new_serial
.baud_base
/ new_serial
.custom_divisor
;
1423 tty_encode_baud_rate(info
->port
.tty
, baud
, baud
);
1427 info
->type
= new_serial
.type
;
1429 process_txrx_fifo(info
);
1431 if (info
->port
.flags
& ASYNC_INITIALIZED
) {
1432 if (flags
!= (info
->port
.flags
& ASYNC_SPD_MASK
)) {
1433 spin_lock_irqsave(&info
->slock
, sl_flags
);
1434 mxser_change_speed(info
, NULL
);
1435 spin_unlock_irqrestore(&info
->slock
, sl_flags
);
1438 retval
= mxser_startup(info
);
1444 * mxser_get_lsr_info - get line status register info
1446 * Purpose: Let user call ioctl() to get info when the UART physically
1447 * is emptied. On bus types like RS485, the transmitter must
1448 * release the bus after transmitting. This must be done when
1449 * the transmit shift register is empty, not be done when the
1450 * transmit holding register is empty. This functionality
1451 * allows an RS485 driver to be written in user space.
1453 static int mxser_get_lsr_info(struct mxser_port
*info
,
1454 unsigned int __user
*value
)
1456 unsigned char status
;
1457 unsigned int result
;
1458 unsigned long flags
;
1460 spin_lock_irqsave(&info
->slock
, flags
);
1461 status
= inb(info
->ioaddr
+ UART_LSR
);
1462 spin_unlock_irqrestore(&info
->slock
, flags
);
1463 result
= ((status
& UART_LSR_TEMT
) ? TIOCSER_TEMT
: 0);
1464 return put_user(result
, value
);
1467 static int mxser_tiocmget(struct tty_struct
*tty
, struct file
*file
)
1469 struct mxser_port
*info
= tty
->driver_data
;
1470 unsigned char control
, status
;
1471 unsigned long flags
;
1474 if (tty
->index
== MXSER_PORTS
)
1475 return -ENOIOCTLCMD
;
1476 if (test_bit(TTY_IO_ERROR
, &tty
->flags
))
1479 control
= info
->MCR
;
1481 spin_lock_irqsave(&info
->slock
, flags
);
1482 status
= inb(info
->ioaddr
+ UART_MSR
);
1483 if (status
& UART_MSR_ANY_DELTA
)
1484 mxser_check_modem_status(info
, status
);
1485 spin_unlock_irqrestore(&info
->slock
, flags
);
1486 return ((control
& UART_MCR_RTS
) ? TIOCM_RTS
: 0) |
1487 ((control
& UART_MCR_DTR
) ? TIOCM_DTR
: 0) |
1488 ((status
& UART_MSR_DCD
) ? TIOCM_CAR
: 0) |
1489 ((status
& UART_MSR_RI
) ? TIOCM_RNG
: 0) |
1490 ((status
& UART_MSR_DSR
) ? TIOCM_DSR
: 0) |
1491 ((status
& UART_MSR_CTS
) ? TIOCM_CTS
: 0);
1494 static int mxser_tiocmset(struct tty_struct
*tty
, struct file
*file
,
1495 unsigned int set
, unsigned int clear
)
1497 struct mxser_port
*info
= tty
->driver_data
;
1498 unsigned long flags
;
1501 if (tty
->index
== MXSER_PORTS
)
1502 return -ENOIOCTLCMD
;
1503 if (test_bit(TTY_IO_ERROR
, &tty
->flags
))
1506 spin_lock_irqsave(&info
->slock
, flags
);
1508 if (set
& TIOCM_RTS
)
1509 info
->MCR
|= UART_MCR_RTS
;
1510 if (set
& TIOCM_DTR
)
1511 info
->MCR
|= UART_MCR_DTR
;
1513 if (clear
& TIOCM_RTS
)
1514 info
->MCR
&= ~UART_MCR_RTS
;
1515 if (clear
& TIOCM_DTR
)
1516 info
->MCR
&= ~UART_MCR_DTR
;
1518 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
1519 spin_unlock_irqrestore(&info
->slock
, flags
);
1523 static int __init
mxser_program_mode(int port
)
1535 id
= inb(port
+ 1) & 0x1F;
1536 if ((id
!= C168_ASIC_ID
) &&
1537 (id
!= C104_ASIC_ID
) &&
1538 (id
!= C102_ASIC_ID
) &&
1539 (id
!= CI132_ASIC_ID
) &&
1540 (id
!= CI134_ASIC_ID
) &&
1541 (id
!= CI104J_ASIC_ID
))
1543 for (i
= 0, j
= 0; i
< 4; i
++) {
1547 } else if ((j
== 1) && (n
== 1)) {
1558 static void __init
mxser_normal_mode(int port
)
1562 outb(0xA5, port
+ 1);
1563 outb(0x80, port
+ 3);
1564 outb(12, port
+ 0); /* 9600 bps */
1566 outb(0x03, port
+ 3); /* 8 data bits */
1567 outb(0x13, port
+ 4); /* loop back mode */
1568 for (i
= 0; i
< 16; i
++) {
1570 if ((n
& 0x61) == 0x60)
1575 outb(0x00, port
+ 4);
1578 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
1579 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
1580 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
1581 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
1582 #define EN_CCMD 0x000 /* Chip's command register */
1583 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
1584 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
1585 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
1586 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
1587 #define EN0_DCFG 0x00E /* Data configuration reg WR */
1588 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
1589 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
1590 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
1591 static int __init
mxser_read_register(int port
, unsigned short *regs
)
1593 int i
, k
, value
, id
;
1596 id
= mxser_program_mode(port
);
1599 for (i
= 0; i
< 14; i
++) {
1600 k
= (i
& 0x3F) | 0x180;
1601 for (j
= 0x100; j
> 0; j
>>= 1) {
1602 outb(CHIP_CS
, port
);
1604 outb(CHIP_CS
| CHIP_DO
, port
);
1605 outb(CHIP_CS
| CHIP_DO
| CHIP_SK
, port
); /* A? bit of read */
1607 outb(CHIP_CS
, port
);
1608 outb(CHIP_CS
| CHIP_SK
, port
); /* A? bit of read */
1613 for (k
= 0, j
= 0x8000; k
< 16; k
++, j
>>= 1) {
1614 outb(CHIP_CS
, port
);
1615 outb(CHIP_CS
| CHIP_SK
, port
);
1616 if (inb(port
) & CHIP_DI
)
1622 mxser_normal_mode(port
);
1626 static int mxser_ioctl_special(unsigned int cmd
, void __user
*argp
)
1628 struct mxser_port
*port
;
1634 case MOXA_GET_MAJOR
:
1635 return put_user(ttymajor
, (int __user
*)argp
);
1637 case MOXA_CHKPORTENABLE
:
1640 for (i
= 0; i
< MXSER_BOARDS
; i
++)
1641 for (j
= 0; j
< MXSER_PORTS_PER_BOARD
; j
++)
1642 if (mxser_boards
[i
].ports
[j
].ioaddr
)
1645 return put_user(result
, (unsigned long __user
*)argp
);
1646 case MOXA_GETDATACOUNT
:
1648 if (copy_to_user(argp
, &mxvar_log
, sizeof(mxvar_log
)))
1652 case MOXA_GETMSTATUS
:
1654 for (i
= 0; i
< MXSER_BOARDS
; i
++)
1655 for (j
= 0; j
< MXSER_PORTS_PER_BOARD
; j
++) {
1656 port
= &mxser_boards
[i
].ports
[j
];
1659 if (!port
->ioaddr
) {
1660 GMStatus
[i
].dcd
= 0;
1661 GMStatus
[i
].dsr
= 0;
1662 GMStatus
[i
].cts
= 0;
1666 if (!port
->port
.tty
|| !port
->port
.tty
->termios
)
1668 port
->normal_termios
.c_cflag
;
1671 port
->port
.tty
->termios
->c_cflag
;
1673 status
= inb(port
->ioaddr
+ UART_MSR
);
1674 if (status
& 0x80 /*UART_MSR_DCD */ )
1675 GMStatus
[i
].dcd
= 1;
1677 GMStatus
[i
].dcd
= 0;
1679 if (status
& 0x20 /*UART_MSR_DSR */ )
1680 GMStatus
[i
].dsr
= 1;
1682 GMStatus
[i
].dsr
= 0;
1685 if (status
& 0x10 /*UART_MSR_CTS */ )
1686 GMStatus
[i
].cts
= 1;
1688 GMStatus
[i
].cts
= 0;
1691 if (copy_to_user(argp
, GMStatus
,
1692 sizeof(struct mxser_mstatus
) * MXSER_PORTS
))
1695 case MOXA_ASPP_MON_EXT
: {
1697 unsigned long opmode
;
1698 unsigned cflag
, iflag
;
1701 for (i
= 0; i
< MXSER_BOARDS
; i
++) {
1702 for (j
= 0; j
< MXSER_PORTS_PER_BOARD
; j
++) {
1703 port
= &mxser_boards
[i
].ports
[j
];
1707 status
= mxser_get_msr(port
->ioaddr
, 0, i
);
1709 if (status
& UART_MSR_TERI
)
1711 if (status
& UART_MSR_DDSR
)
1713 if (status
& UART_MSR_DDCD
)
1715 if (status
& UART_MSR_DCTS
)
1718 port
->mon_data
.modem_status
= status
;
1719 mon_data_ext
.rx_cnt
[i
] = port
->mon_data
.rxcnt
;
1720 mon_data_ext
.tx_cnt
[i
] = port
->mon_data
.txcnt
;
1721 mon_data_ext
.up_rxcnt
[i
] =
1722 port
->mon_data
.up_rxcnt
;
1723 mon_data_ext
.up_txcnt
[i
] =
1724 port
->mon_data
.up_txcnt
;
1725 mon_data_ext
.modem_status
[i
] =
1726 port
->mon_data
.modem_status
;
1727 mon_data_ext
.baudrate
[i
] =
1728 tty_get_baud_rate(port
->port
.tty
);
1730 if (!port
->port
.tty
|| !port
->port
.tty
->termios
) {
1731 cflag
= port
->normal_termios
.c_cflag
;
1732 iflag
= port
->normal_termios
.c_iflag
;
1734 cflag
= port
->port
.tty
->termios
->c_cflag
;
1735 iflag
= port
->port
.tty
->termios
->c_iflag
;
1738 mon_data_ext
.databits
[i
] = cflag
& CSIZE
;
1740 mon_data_ext
.stopbits
[i
] = cflag
& CSTOPB
;
1742 mon_data_ext
.parity
[i
] =
1743 cflag
& (PARENB
| PARODD
| CMSPAR
);
1745 mon_data_ext
.flowctrl
[i
] = 0x00;
1747 if (cflag
& CRTSCTS
)
1748 mon_data_ext
.flowctrl
[i
] |= 0x03;
1750 if (iflag
& (IXON
| IXOFF
))
1751 mon_data_ext
.flowctrl
[i
] |= 0x0C;
1753 if (port
->type
== PORT_16550A
)
1754 mon_data_ext
.fifo
[i
] = 1;
1756 mon_data_ext
.fifo
[i
] = 0;
1760 opmode
= inb(port
->opmode_ioaddr
) >> shiftbit
;
1761 opmode
&= OP_MODE_MASK
;
1763 mon_data_ext
.iftype
[i
] = opmode
;
1768 if (copy_to_user(argp
, &mon_data_ext
,
1769 sizeof(mon_data_ext
)))
1774 return -ENOIOCTLCMD
;
1779 static int mxser_cflags_changed(struct mxser_port
*info
, unsigned long arg
,
1780 struct async_icount
*cprev
)
1782 struct async_icount cnow
;
1783 unsigned long flags
;
1786 spin_lock_irqsave(&info
->slock
, flags
);
1787 cnow
= info
->icount
; /* atomic copy */
1788 spin_unlock_irqrestore(&info
->slock
, flags
);
1790 ret
= ((arg
& TIOCM_RNG
) && (cnow
.rng
!= cprev
->rng
)) ||
1791 ((arg
& TIOCM_DSR
) && (cnow
.dsr
!= cprev
->dsr
)) ||
1792 ((arg
& TIOCM_CD
) && (cnow
.dcd
!= cprev
->dcd
)) ||
1793 ((arg
& TIOCM_CTS
) && (cnow
.cts
!= cprev
->cts
));
1800 static int mxser_ioctl(struct tty_struct
*tty
, struct file
*file
,
1801 unsigned int cmd
, unsigned long arg
)
1803 struct mxser_port
*info
= tty
->driver_data
;
1804 struct async_icount cnow
;
1805 struct serial_icounter_struct __user
*p_cuser
;
1806 unsigned long flags
;
1807 void __user
*argp
= (void __user
*)arg
;
1810 if (tty
->index
== MXSER_PORTS
)
1811 return mxser_ioctl_special(cmd
, argp
);
1813 if (cmd
== MOXA_SET_OP_MODE
|| cmd
== MOXA_GET_OP_MODE
) {
1815 unsigned long opmode
;
1816 static unsigned char ModeMask
[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1818 unsigned char val
, mask
;
1821 if (cmd
== MOXA_SET_OP_MODE
) {
1822 if (get_user(opmode
, (int __user
*) argp
))
1824 if (opmode
!= RS232_MODE
&&
1825 opmode
!= RS485_2WIRE_MODE
&&
1826 opmode
!= RS422_MODE
&&
1827 opmode
!= RS485_4WIRE_MODE
)
1832 val
= inb(info
->opmode_ioaddr
);
1834 val
|= (opmode
<< shiftbit
);
1835 outb(val
, info
->opmode_ioaddr
);
1840 opmode
= inb(info
->opmode_ioaddr
) >> shiftbit
;
1841 opmode
&= OP_MODE_MASK
;
1843 if (put_user(opmode
, (int __user
*)argp
))
1849 if (cmd
!= TIOCGSERIAL
&& cmd
!= TIOCMIWAIT
&& cmd
!= TIOCGICOUNT
&&
1850 test_bit(TTY_IO_ERROR
, &tty
->flags
))
1856 retval
= mxser_get_serial_info(info
, argp
);
1861 retval
= mxser_set_serial_info(info
, argp
);
1864 case TIOCSERGETLSR
: /* Get line status register */
1865 return mxser_get_lsr_info(info
, argp
);
1867 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1868 * - mask passed in arg for lines of interest
1869 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1870 * Caller should use TIOCGICOUNT to see which one it was
1873 spin_lock_irqsave(&info
->slock
, flags
);
1874 cnow
= info
->icount
; /* note the counters on entry */
1875 spin_unlock_irqrestore(&info
->slock
, flags
);
1877 return wait_event_interruptible(info
->delta_msr_wait
,
1878 mxser_cflags_changed(info
, arg
, &cnow
));
1880 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1881 * Return: write counters to the user passed counter struct
1882 * NB: both 1->0 and 0->1 transitions are counted except for
1883 * RI where only 0->1 is counted.
1886 spin_lock_irqsave(&info
->slock
, flags
);
1887 cnow
= info
->icount
;
1888 spin_unlock_irqrestore(&info
->slock
, flags
);
1890 if (put_user(cnow
.frame
, &p_cuser
->frame
))
1892 if (put_user(cnow
.brk
, &p_cuser
->brk
))
1894 if (put_user(cnow
.overrun
, &p_cuser
->overrun
))
1896 if (put_user(cnow
.buf_overrun
, &p_cuser
->buf_overrun
))
1898 if (put_user(cnow
.parity
, &p_cuser
->parity
))
1900 if (put_user(cnow
.rx
, &p_cuser
->rx
))
1902 if (put_user(cnow
.tx
, &p_cuser
->tx
))
1904 put_user(cnow
.cts
, &p_cuser
->cts
);
1905 put_user(cnow
.dsr
, &p_cuser
->dsr
);
1906 put_user(cnow
.rng
, &p_cuser
->rng
);
1907 put_user(cnow
.dcd
, &p_cuser
->dcd
);
1909 case MOXA_HighSpeedOn
:
1910 return put_user(info
->baud_base
!= 115200 ? 1 : 0, (int __user
*)argp
);
1911 case MOXA_SDS_RSTICOUNTER
:
1913 info
->mon_data
.rxcnt
= 0;
1914 info
->mon_data
.txcnt
= 0;
1918 case MOXA_ASPP_OQUEUE
:{
1922 len
= mxser_chars_in_buffer(tty
);
1923 lsr
= inb(info
->ioaddr
+ UART_LSR
) & UART_LSR_TEMT
;
1924 len
+= (lsr
? 0 : 1);
1927 return put_user(len
, (int __user
*)argp
);
1929 case MOXA_ASPP_MON
: {
1933 status
= mxser_get_msr(info
->ioaddr
, 1, tty
->index
);
1934 mxser_check_modem_status(info
, status
);
1936 mcr
= inb(info
->ioaddr
+ UART_MCR
);
1937 if (mcr
& MOXA_MUST_MCR_XON_FLAG
)
1938 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_XOFFHOLD
;
1940 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_XOFFHOLD
;
1942 if (mcr
& MOXA_MUST_MCR_TX_XON
)
1943 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_XOFFXENT
;
1945 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_XOFFXENT
;
1947 if (info
->port
.tty
->hw_stopped
)
1948 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_CTSHOLD
;
1950 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_CTSHOLD
;
1952 if (copy_to_user(argp
, &info
->mon_data
,
1953 sizeof(struct mxser_mon
)))
1958 case MOXA_ASPP_LSTATUS
: {
1959 if (put_user(info
->err_shadow
, (unsigned char __user
*)argp
))
1962 info
->err_shadow
= 0;
1965 case MOXA_SET_BAUD_METHOD
: {
1968 if (get_user(method
, (int __user
*)argp
))
1970 mxser_set_baud_method
[tty
->index
] = method
;
1971 return put_user(method
, (int __user
*)argp
);
1974 return -ENOIOCTLCMD
;
1979 static void mxser_stoprx(struct tty_struct
*tty
)
1981 struct mxser_port
*info
= tty
->driver_data
;
1983 info
->ldisc_stop_rx
= 1;
1985 if (info
->board
->chip_flag
) {
1986 info
->IER
&= ~MOXA_MUST_RECV_ISR
;
1987 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1989 info
->x_char
= STOP_CHAR(tty
);
1990 outb(0, info
->ioaddr
+ UART_IER
);
1991 info
->IER
|= UART_IER_THRI
;
1992 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1996 if (info
->port
.tty
->termios
->c_cflag
& CRTSCTS
) {
1997 info
->MCR
&= ~UART_MCR_RTS
;
1998 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
2003 * This routine is called by the upper-layer tty layer to signal that
2004 * incoming characters should be throttled.
2006 static void mxser_throttle(struct tty_struct
*tty
)
2011 static void mxser_unthrottle(struct tty_struct
*tty
)
2013 struct mxser_port
*info
= tty
->driver_data
;
2016 info
->ldisc_stop_rx
= 0;
2021 if (info
->board
->chip_flag
) {
2022 info
->IER
|= MOXA_MUST_RECV_ISR
;
2023 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
2025 info
->x_char
= START_CHAR(tty
);
2026 outb(0, info
->ioaddr
+ UART_IER
);
2027 info
->IER
|= UART_IER_THRI
;
2028 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
2033 if (info
->port
.tty
->termios
->c_cflag
& CRTSCTS
) {
2034 info
->MCR
|= UART_MCR_RTS
;
2035 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
2040 * mxser_stop() and mxser_start()
2042 * This routines are called before setting or resetting tty->stopped.
2043 * They enable or disable transmitter interrupts, as necessary.
2045 static void mxser_stop(struct tty_struct
*tty
)
2047 struct mxser_port
*info
= tty
->driver_data
;
2048 unsigned long flags
;
2050 spin_lock_irqsave(&info
->slock
, flags
);
2051 if (info
->IER
& UART_IER_THRI
) {
2052 info
->IER
&= ~UART_IER_THRI
;
2053 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
2055 spin_unlock_irqrestore(&info
->slock
, flags
);
2058 static void mxser_start(struct tty_struct
*tty
)
2060 struct mxser_port
*info
= tty
->driver_data
;
2061 unsigned long flags
;
2063 spin_lock_irqsave(&info
->slock
, flags
);
2064 if (info
->xmit_cnt
&& info
->port
.xmit_buf
) {
2065 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
2066 info
->IER
|= UART_IER_THRI
;
2067 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
2069 spin_unlock_irqrestore(&info
->slock
, flags
);
2072 static void mxser_set_termios(struct tty_struct
*tty
, struct ktermios
*old_termios
)
2074 struct mxser_port
*info
= tty
->driver_data
;
2075 unsigned long flags
;
2077 spin_lock_irqsave(&info
->slock
, flags
);
2078 mxser_change_speed(info
, old_termios
);
2079 spin_unlock_irqrestore(&info
->slock
, flags
);
2081 if ((old_termios
->c_cflag
& CRTSCTS
) &&
2082 !(tty
->termios
->c_cflag
& CRTSCTS
)) {
2083 tty
->hw_stopped
= 0;
2087 /* Handle sw stopped */
2088 if ((old_termios
->c_iflag
& IXON
) &&
2089 !(tty
->termios
->c_iflag
& IXON
)) {
2092 if (info
->board
->chip_flag
) {
2093 spin_lock_irqsave(&info
->slock
, flags
);
2094 mxser_disable_must_rx_software_flow_control(
2096 spin_unlock_irqrestore(&info
->slock
, flags
);
2104 * mxser_wait_until_sent() --- wait until the transmitter is empty
2106 static void mxser_wait_until_sent(struct tty_struct
*tty
, int timeout
)
2108 struct mxser_port
*info
= tty
->driver_data
;
2109 unsigned long orig_jiffies
, char_time
;
2112 if (info
->type
== PORT_UNKNOWN
)
2115 if (info
->xmit_fifo_size
== 0)
2116 return; /* Just in case.... */
2118 orig_jiffies
= jiffies
;
2120 * Set the check interval to be 1/5 of the estimated time to
2121 * send a single character, and make it at least 1. The check
2122 * interval should also be less than the timeout.
2124 * Note: we have to use pretty tight timings here to satisfy
2127 char_time
= (info
->timeout
- HZ
/ 50) / info
->xmit_fifo_size
;
2128 char_time
= char_time
/ 5;
2131 if (timeout
&& timeout
< char_time
)
2132 char_time
= timeout
;
2134 * If the transmitter hasn't cleared in twice the approximate
2135 * amount of time to send the entire FIFO, it probably won't
2136 * ever clear. This assumes the UART isn't doing flow
2137 * control, which is currently the case. Hence, if it ever
2138 * takes longer than info->timeout, this is probably due to a
2139 * UART bug of some kind. So, we clamp the timeout parameter at
2142 if (!timeout
|| timeout
> 2 * info
->timeout
)
2143 timeout
= 2 * info
->timeout
;
2144 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2145 printk(KERN_DEBUG
"In rs_wait_until_sent(%d) check=%lu...",
2146 timeout
, char_time
);
2147 printk("jiff=%lu...", jiffies
);
2150 while (!((lsr
= inb(info
->ioaddr
+ UART_LSR
)) & UART_LSR_TEMT
)) {
2151 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2152 printk("lsr = %d (jiff=%lu)...", lsr
, jiffies
);
2154 schedule_timeout_interruptible(char_time
);
2155 if (signal_pending(current
))
2157 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2160 set_current_state(TASK_RUNNING
);
2163 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2164 printk("lsr = %d (jiff=%lu)...done\n", lsr
, jiffies
);
2169 * This routine is called by tty_hangup() when a hangup is signaled.
2171 static void mxser_hangup(struct tty_struct
*tty
)
2173 struct mxser_port
*info
= tty
->driver_data
;
2175 mxser_flush_buffer(tty
);
2176 mxser_shutdown(info
);
2177 info
->port
.count
= 0;
2178 info
->port
.flags
&= ~ASYNC_NORMAL_ACTIVE
;
2179 info
->port
.tty
= NULL
;
2180 wake_up_interruptible(&info
->port
.open_wait
);
2184 * mxser_rs_break() --- routine which turns the break handling on or off
2186 static int mxser_rs_break(struct tty_struct
*tty
, int break_state
)
2188 struct mxser_port
*info
= tty
->driver_data
;
2189 unsigned long flags
;
2191 spin_lock_irqsave(&info
->slock
, flags
);
2192 if (break_state
== -1)
2193 outb(inb(info
->ioaddr
+ UART_LCR
) | UART_LCR_SBC
,
2194 info
->ioaddr
+ UART_LCR
);
2196 outb(inb(info
->ioaddr
+ UART_LCR
) & ~UART_LCR_SBC
,
2197 info
->ioaddr
+ UART_LCR
);
2198 spin_unlock_irqrestore(&info
->slock
, flags
);
2202 static void mxser_receive_chars(struct mxser_port
*port
, int *status
)
2204 struct tty_struct
*tty
= port
->port
.tty
;
2205 unsigned char ch
, gdl
;
2211 recv_room
= tty
->receive_room
;
2212 if ((recv_room
== 0) && (!port
->ldisc_stop_rx
))
2215 if (port
->board
->chip_flag
!= MOXA_OTHER_UART
) {
2217 if (*status
& UART_LSR_SPECIAL
)
2219 if (port
->board
->chip_flag
== MOXA_MUST_MU860_HWID
&&
2220 (*status
& MOXA_MUST_LSR_RERR
))
2222 if (*status
& MOXA_MUST_LSR_RERR
)
2225 gdl
= inb(port
->ioaddr
+ MOXA_MUST_GDL_REGISTER
);
2227 if (port
->board
->chip_flag
== MOXA_MUST_MU150_HWID
)
2228 gdl
&= MOXA_MUST_GDL_MASK
;
2229 if (gdl
>= recv_room
) {
2230 if (!port
->ldisc_stop_rx
)
2234 ch
= inb(port
->ioaddr
+ UART_RX
);
2235 tty_insert_flip_char(tty
, ch
, 0);
2246 ch
= inb(port
->ioaddr
+ UART_RX
);
2247 if (port
->board
->chip_flag
&& (*status
& UART_LSR_OE
))
2248 outb(0x23, port
->ioaddr
+ UART_FCR
);
2249 *status
&= port
->read_status_mask
;
2250 if (*status
& port
->ignore_status_mask
) {
2251 if (++ignored
> 100)
2255 if (*status
& UART_LSR_SPECIAL
) {
2256 if (*status
& UART_LSR_BI
) {
2260 if (port
->port
.flags
& ASYNC_SAK
)
2262 } else if (*status
& UART_LSR_PE
) {
2264 port
->icount
.parity
++;
2265 } else if (*status
& UART_LSR_FE
) {
2267 port
->icount
.frame
++;
2268 } else if (*status
& UART_LSR_OE
) {
2270 port
->icount
.overrun
++;
2274 tty_insert_flip_char(tty
, ch
, flag
);
2276 if (cnt
>= recv_room
) {
2277 if (!port
->ldisc_stop_rx
)
2284 if (port
->board
->chip_flag
)
2287 *status
= inb(port
->ioaddr
+ UART_LSR
);
2288 } while (*status
& UART_LSR_DR
);
2291 mxvar_log
.rxcnt
[port
->port
.tty
->index
] += cnt
;
2292 port
->mon_data
.rxcnt
+= cnt
;
2293 port
->mon_data
.up_rxcnt
+= cnt
;
2296 * We are called from an interrupt context with &port->slock
2297 * being held. Drop it temporarily in order to prevent
2298 * recursive locking.
2300 spin_unlock(&port
->slock
);
2301 tty_flip_buffer_push(tty
);
2302 spin_lock(&port
->slock
);
2305 static void mxser_transmit_chars(struct mxser_port
*port
)
2310 outb(port
->x_char
, port
->ioaddr
+ UART_TX
);
2312 mxvar_log
.txcnt
[port
->port
.tty
->index
]++;
2313 port
->mon_data
.txcnt
++;
2314 port
->mon_data
.up_txcnt
++;
2319 if (port
->port
.xmit_buf
== NULL
)
2322 if ((port
->xmit_cnt
<= 0) || port
->port
.tty
->stopped
||
2323 (port
->port
.tty
->hw_stopped
&&
2324 (port
->type
!= PORT_16550A
) &&
2325 (!port
->board
->chip_flag
))) {
2326 port
->IER
&= ~UART_IER_THRI
;
2327 outb(port
->IER
, port
->ioaddr
+ UART_IER
);
2331 cnt
= port
->xmit_cnt
;
2332 count
= port
->xmit_fifo_size
;
2334 outb(port
->port
.xmit_buf
[port
->xmit_tail
++],
2335 port
->ioaddr
+ UART_TX
);
2336 port
->xmit_tail
= port
->xmit_tail
& (SERIAL_XMIT_SIZE
- 1);
2337 if (--port
->xmit_cnt
<= 0)
2339 } while (--count
> 0);
2340 mxvar_log
.txcnt
[port
->port
.tty
->index
] += (cnt
- port
->xmit_cnt
);
2342 port
->mon_data
.txcnt
+= (cnt
- port
->xmit_cnt
);
2343 port
->mon_data
.up_txcnt
+= (cnt
- port
->xmit_cnt
);
2344 port
->icount
.tx
+= (cnt
- port
->xmit_cnt
);
2346 if (port
->xmit_cnt
< WAKEUP_CHARS
)
2347 tty_wakeup(port
->port
.tty
);
2349 if (port
->xmit_cnt
<= 0) {
2350 port
->IER
&= ~UART_IER_THRI
;
2351 outb(port
->IER
, port
->ioaddr
+ UART_IER
);
2356 * This is the serial driver's generic interrupt routine
2358 static irqreturn_t
mxser_interrupt(int irq
, void *dev_id
)
2361 struct mxser_board
*brd
= NULL
;
2362 struct mxser_port
*port
;
2363 int max
, irqbits
, bits
, msr
;
2364 unsigned int int_cnt
, pass_counter
= 0;
2365 int handled
= IRQ_NONE
;
2367 for (i
= 0; i
< MXSER_BOARDS
; i
++)
2368 if (dev_id
== &mxser_boards
[i
]) {
2373 if (i
== MXSER_BOARDS
)
2377 max
= brd
->info
->nports
;
2378 while (pass_counter
++ < MXSER_ISR_PASS_LIMIT
) {
2379 irqbits
= inb(brd
->vector
) & brd
->vector_mask
;
2380 if (irqbits
== brd
->vector_mask
)
2383 handled
= IRQ_HANDLED
;
2384 for (i
= 0, bits
= 1; i
< max
; i
++, irqbits
|= bits
, bits
<<= 1) {
2385 if (irqbits
== brd
->vector_mask
)
2389 port
= &brd
->ports
[i
];
2392 spin_lock(&port
->slock
);
2394 iir
= inb(port
->ioaddr
+ UART_IIR
);
2395 if (iir
& UART_IIR_NO_INT
)
2397 iir
&= MOXA_MUST_IIR_MASK
;
2398 if (!port
->port
.tty
||
2399 (port
->port
.flags
& ASYNC_CLOSING
) ||
2400 !(port
->port
.flags
&
2401 ASYNC_INITIALIZED
)) {
2402 status
= inb(port
->ioaddr
+ UART_LSR
);
2403 outb(0x27, port
->ioaddr
+ UART_FCR
);
2404 inb(port
->ioaddr
+ UART_MSR
);
2408 status
= inb(port
->ioaddr
+ UART_LSR
);
2410 if (status
& UART_LSR_PE
)
2411 port
->err_shadow
|= NPPI_NOTIFY_PARITY
;
2412 if (status
& UART_LSR_FE
)
2413 port
->err_shadow
|= NPPI_NOTIFY_FRAMING
;
2414 if (status
& UART_LSR_OE
)
2416 NPPI_NOTIFY_HW_OVERRUN
;
2417 if (status
& UART_LSR_BI
)
2418 port
->err_shadow
|= NPPI_NOTIFY_BREAK
;
2420 if (port
->board
->chip_flag
) {
2421 if (iir
== MOXA_MUST_IIR_GDA
||
2422 iir
== MOXA_MUST_IIR_RDA
||
2423 iir
== MOXA_MUST_IIR_RTO
||
2424 iir
== MOXA_MUST_IIR_LSR
)
2425 mxser_receive_chars(port
,
2429 status
&= port
->read_status_mask
;
2430 if (status
& UART_LSR_DR
)
2431 mxser_receive_chars(port
,
2434 msr
= inb(port
->ioaddr
+ UART_MSR
);
2435 if (msr
& UART_MSR_ANY_DELTA
)
2436 mxser_check_modem_status(port
, msr
);
2438 if (port
->board
->chip_flag
) {
2439 if (iir
== 0x02 && (status
&
2441 mxser_transmit_chars(port
);
2443 if (status
& UART_LSR_THRE
)
2444 mxser_transmit_chars(port
);
2446 } while (int_cnt
++ < MXSER_ISR_PASS_LIMIT
);
2447 spin_unlock(&port
->slock
);
2455 static const struct tty_operations mxser_ops
= {
2457 .close
= mxser_close
,
2458 .write
= mxser_write
,
2459 .put_char
= mxser_put_char
,
2460 .flush_chars
= mxser_flush_chars
,
2461 .write_room
= mxser_write_room
,
2462 .chars_in_buffer
= mxser_chars_in_buffer
,
2463 .flush_buffer
= mxser_flush_buffer
,
2464 .ioctl
= mxser_ioctl
,
2465 .throttle
= mxser_throttle
,
2466 .unthrottle
= mxser_unthrottle
,
2467 .set_termios
= mxser_set_termios
,
2469 .start
= mxser_start
,
2470 .hangup
= mxser_hangup
,
2471 .break_ctl
= mxser_rs_break
,
2472 .wait_until_sent
= mxser_wait_until_sent
,
2473 .tiocmget
= mxser_tiocmget
,
2474 .tiocmset
= mxser_tiocmset
,
2478 * The MOXA Smartio/Industio serial driver boot-time initialization code!
2481 static void mxser_release_res(struct mxser_board
*brd
, struct pci_dev
*pdev
,
2485 free_irq(brd
->irq
, brd
);
2486 if (pdev
!= NULL
) { /* PCI */
2488 pci_release_region(pdev
, 2);
2489 pci_release_region(pdev
, 3);
2492 release_region(brd
->ports
[0].ioaddr
, 8 * brd
->info
->nports
);
2493 release_region(brd
->vector
, 1);
2497 static int __devinit
mxser_initbrd(struct mxser_board
*brd
,
2498 struct pci_dev
*pdev
)
2500 struct mxser_port
*info
;
2504 printk(KERN_INFO
"max. baud rate = %d bps.\n", brd
->ports
[0].max_baud
);
2506 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2507 info
= &brd
->ports
[i
];
2508 tty_port_init(&info
->port
);
2511 info
->ldisc_stop_rx
= 0;
2513 /* Enhance mode enabled here */
2514 if (brd
->chip_flag
!= MOXA_OTHER_UART
)
2515 mxser_enable_must_enchance_mode(info
->ioaddr
);
2517 info
->port
.flags
= ASYNC_SHARE_IRQ
;
2518 info
->type
= brd
->uart_type
;
2520 process_txrx_fifo(info
);
2522 info
->custom_divisor
= info
->baud_base
* 16;
2523 info
->port
.close_delay
= 5 * HZ
/ 10;
2524 info
->port
.closing_wait
= 30 * HZ
;
2525 info
->normal_termios
= mxvar_sdriver
->init_termios
;
2526 init_waitqueue_head(&info
->delta_msr_wait
);
2527 memset(&info
->mon_data
, 0, sizeof(struct mxser_mon
));
2528 info
->err_shadow
= 0;
2529 spin_lock_init(&info
->slock
);
2531 /* before set INT ISR, disable all int */
2532 outb(inb(info
->ioaddr
+ UART_IER
) & 0xf0,
2533 info
->ioaddr
+ UART_IER
);
2536 retval
= request_irq(brd
->irq
, mxser_interrupt
, IRQF_SHARED
, "mxser",
2539 printk(KERN_ERR
"Board %s: Request irq failed, IRQ (%d) may "
2540 "conflict with another device.\n",
2541 brd
->info
->name
, brd
->irq
);
2542 /* We hold resources, we need to release them. */
2543 mxser_release_res(brd
, pdev
, 0);
2548 static int __init
mxser_get_ISA_conf(int cap
, struct mxser_board
*brd
)
2551 unsigned short regs
[16], irq
;
2552 unsigned char scratch
, scratch2
;
2554 brd
->chip_flag
= MOXA_OTHER_UART
;
2556 id
= mxser_read_register(cap
, regs
);
2559 brd
->info
= &mxser_cards
[0];
2562 brd
->info
= &mxser_cards
[1];
2564 case CI104J_ASIC_ID
:
2565 brd
->info
= &mxser_cards
[2];
2568 brd
->info
= &mxser_cards
[5];
2571 brd
->info
= &mxser_cards
[6];
2574 brd
->info
= &mxser_cards
[7];
2581 /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2582 Flag-hack checks if configuration should be read as 2-port here. */
2583 if (brd
->info
->nports
== 2 || (brd
->info
->flags
& MXSER_HAS2
)) {
2584 irq
= regs
[9] & 0xF000;
2585 irq
= irq
| (irq
>> 4);
2586 if (irq
!= (regs
[9] & 0xFF00))
2587 return MXSER_ERR_IRQ_CONFLIT
;
2588 } else if (brd
->info
->nports
== 4) {
2589 irq
= regs
[9] & 0xF000;
2590 irq
= irq
| (irq
>> 4);
2591 irq
= irq
| (irq
>> 8);
2593 return MXSER_ERR_IRQ_CONFLIT
;
2594 } else if (brd
->info
->nports
== 8) {
2595 irq
= regs
[9] & 0xF000;
2596 irq
= irq
| (irq
>> 4);
2597 irq
= irq
| (irq
>> 8);
2598 if ((irq
!= regs
[9]) || (irq
!= regs
[10]))
2599 return MXSER_ERR_IRQ_CONFLIT
;
2603 return MXSER_ERR_IRQ
;
2604 brd
->irq
= ((int)(irq
& 0xF000) >> 12);
2605 for (i
= 0; i
< 8; i
++)
2606 brd
->ports
[i
].ioaddr
= (int) regs
[i
+ 1] & 0xFFF8;
2607 if ((regs
[12] & 0x80) == 0)
2608 return MXSER_ERR_VECTOR
;
2609 brd
->vector
= (int)regs
[11]; /* interrupt vector */
2611 brd
->vector_mask
= 0x00FF;
2613 brd
->vector_mask
= 0x000F;
2614 for (i
= 7, bits
= 0x0100; i
>= 0; i
--, bits
<<= 1) {
2615 if (regs
[12] & bits
) {
2616 brd
->ports
[i
].baud_base
= 921600;
2617 brd
->ports
[i
].max_baud
= 921600;
2619 brd
->ports
[i
].baud_base
= 115200;
2620 brd
->ports
[i
].max_baud
= 115200;
2623 scratch2
= inb(cap
+ UART_LCR
) & (~UART_LCR_DLAB
);
2624 outb(scratch2
| UART_LCR_DLAB
, cap
+ UART_LCR
);
2625 outb(0, cap
+ UART_EFR
); /* EFR is the same as FCR */
2626 outb(scratch2
, cap
+ UART_LCR
);
2627 outb(UART_FCR_ENABLE_FIFO
, cap
+ UART_FCR
);
2628 scratch
= inb(cap
+ UART_IIR
);
2631 brd
->uart_type
= PORT_16550A
;
2633 brd
->uart_type
= PORT_16450
;
2634 if (!request_region(brd
->ports
[0].ioaddr
, 8 * brd
->info
->nports
,
2636 return MXSER_ERR_IOADDR
;
2637 if (!request_region(brd
->vector
, 1, "mxser(vector)")) {
2638 release_region(brd
->ports
[0].ioaddr
, 8 * brd
->info
->nports
);
2639 return MXSER_ERR_VECTOR
;
2641 return brd
->info
->nports
;
2644 static int __devinit
mxser_probe(struct pci_dev
*pdev
,
2645 const struct pci_device_id
*ent
)
2648 struct mxser_board
*brd
;
2650 unsigned long ioaddress
;
2651 int retval
= -EINVAL
;
2653 for (i
= 0; i
< MXSER_BOARDS
; i
++)
2654 if (mxser_boards
[i
].info
== NULL
)
2657 if (i
>= MXSER_BOARDS
) {
2658 printk(KERN_ERR
"Too many Smartio/Industio family boards found "
2659 "(maximum %d), board not configured\n", MXSER_BOARDS
);
2663 brd
= &mxser_boards
[i
];
2664 brd
->idx
= i
* MXSER_PORTS_PER_BOARD
;
2665 printk(KERN_INFO
"Found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2666 mxser_cards
[ent
->driver_data
].name
,
2667 pdev
->bus
->number
, PCI_SLOT(pdev
->devfn
));
2669 retval
= pci_enable_device(pdev
);
2671 printk(KERN_ERR
"Moxa SmartI/O PCI enable fail !\n");
2676 ioaddress
= pci_resource_start(pdev
, 2);
2677 retval
= pci_request_region(pdev
, 2, "mxser(IO)");
2681 brd
->info
= &mxser_cards
[ent
->driver_data
];
2682 for (i
= 0; i
< brd
->info
->nports
; i
++)
2683 brd
->ports
[i
].ioaddr
= ioaddress
+ 8 * i
;
2686 ioaddress
= pci_resource_start(pdev
, 3);
2687 retval
= pci_request_region(pdev
, 3, "mxser(vector)");
2690 brd
->vector
= ioaddress
;
2693 brd
->irq
= pdev
->irq
;
2695 brd
->chip_flag
= CheckIsMoxaMust(brd
->ports
[0].ioaddr
);
2696 brd
->uart_type
= PORT_16550A
;
2697 brd
->vector_mask
= 0;
2699 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2700 for (j
= 0; j
< UART_INFO_NUM
; j
++) {
2701 if (Gpci_uart_info
[j
].type
== brd
->chip_flag
) {
2702 brd
->ports
[i
].max_baud
=
2703 Gpci_uart_info
[j
].max_baud
;
2705 /* exception....CP-102 */
2706 if (brd
->info
->flags
& MXSER_HIGHBAUD
)
2707 brd
->ports
[i
].max_baud
= 921600;
2713 if (brd
->chip_flag
== MOXA_MUST_MU860_HWID
) {
2714 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2716 brd
->ports
[i
].opmode_ioaddr
= ioaddress
+ 4;
2718 brd
->ports
[i
].opmode_ioaddr
= ioaddress
+ 0x0c;
2720 outb(0, ioaddress
+ 4); /* default set to RS232 mode */
2721 outb(0, ioaddress
+ 0x0c); /* default set to RS232 mode */
2724 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2725 brd
->vector_mask
|= (1 << i
);
2726 brd
->ports
[i
].baud_base
= 921600;
2729 /* mxser_initbrd will hook ISR. */
2730 retval
= mxser_initbrd(brd
, pdev
);
2734 for (i
= 0; i
< brd
->info
->nports
; i
++)
2735 tty_register_device(mxvar_sdriver
, brd
->idx
+ i
, &pdev
->dev
);
2737 pci_set_drvdata(pdev
, brd
);
2741 pci_release_region(pdev
, 2);
2751 static void __devexit
mxser_remove(struct pci_dev
*pdev
)
2753 struct mxser_board
*brd
= pci_get_drvdata(pdev
);
2756 for (i
= 0; i
< brd
->info
->nports
; i
++)
2757 tty_unregister_device(mxvar_sdriver
, brd
->idx
+ i
);
2759 mxser_release_res(brd
, pdev
, 1);
2763 static struct pci_driver mxser_driver
= {
2765 .id_table
= mxser_pcibrds
,
2766 .probe
= mxser_probe
,
2767 .remove
= __devexit_p(mxser_remove
)
2770 static int __init
mxser_module_init(void)
2772 struct mxser_board
*brd
;
2774 unsigned int i
, m
, isaloop
;
2777 pr_debug("Loading module mxser ...\n");
2779 mxvar_sdriver
= alloc_tty_driver(MXSER_PORTS
+ 1);
2783 printk(KERN_INFO
"MOXA Smartio/Industio family driver version %s\n",
2786 /* Initialize the tty_driver structure */
2787 mxvar_sdriver
->owner
= THIS_MODULE
;
2788 mxvar_sdriver
->magic
= TTY_DRIVER_MAGIC
;
2789 mxvar_sdriver
->name
= "ttyMI";
2790 mxvar_sdriver
->major
= ttymajor
;
2791 mxvar_sdriver
->minor_start
= 0;
2792 mxvar_sdriver
->num
= MXSER_PORTS
+ 1;
2793 mxvar_sdriver
->type
= TTY_DRIVER_TYPE_SERIAL
;
2794 mxvar_sdriver
->subtype
= SERIAL_TYPE_NORMAL
;
2795 mxvar_sdriver
->init_termios
= tty_std_termios
;
2796 mxvar_sdriver
->init_termios
.c_cflag
= B9600
|CS8
|CREAD
|HUPCL
|CLOCAL
;
2797 mxvar_sdriver
->flags
= TTY_DRIVER_REAL_RAW
|TTY_DRIVER_DYNAMIC_DEV
;
2798 tty_set_operations(mxvar_sdriver
, &mxser_ops
);
2800 retval
= tty_register_driver(mxvar_sdriver
);
2802 printk(KERN_ERR
"Couldn't install MOXA Smartio/Industio family "
2810 /* Start finding ISA boards here */
2811 for (isaloop
= 0; isaloop
< 2; isaloop
++)
2812 for (b
= 0; b
< MXSER_BOARDS
&& m
< MXSER_BOARDS
; b
++) {
2814 cap
= mxserBoardCAP
[b
]; /* predefined */
2816 cap
= ioaddr
[b
]; /* module param */
2821 brd
= &mxser_boards
[m
];
2822 retval
= mxser_get_ISA_conf(cap
, brd
);
2825 printk(KERN_INFO
"Found MOXA %s board "
2827 brd
->info
->name
, ioaddr
[b
]);
2830 if (retval
== MXSER_ERR_IRQ
)
2831 printk(KERN_ERR
"Invalid interrupt "
2832 "number, board not "
2834 else if (retval
== MXSER_ERR_IRQ_CONFLIT
)
2835 printk(KERN_ERR
"Invalid interrupt "
2836 "number, board not "
2838 else if (retval
== MXSER_ERR_VECTOR
)
2839 printk(KERN_ERR
"Invalid interrupt "
2840 "vector, board not "
2842 else if (retval
== MXSER_ERR_IOADDR
)
2843 printk(KERN_ERR
"Invalid I/O address, "
2844 "board not configured\n");
2850 /* mxser_initbrd will hook ISR. */
2851 if (mxser_initbrd(brd
, NULL
) < 0) {
2856 brd
->idx
= m
* MXSER_PORTS_PER_BOARD
;
2857 for (i
= 0; i
< brd
->info
->nports
; i
++)
2858 tty_register_device(mxvar_sdriver
, brd
->idx
+ i
,
2864 retval
= pci_register_driver(&mxser_driver
);
2866 printk(KERN_ERR
"Can't register pci driver\n");
2870 } /* else: we have some ISA cards under control */
2873 pr_debug("Done.\n");
2877 tty_unregister_driver(mxvar_sdriver
);
2879 put_tty_driver(mxvar_sdriver
);
2883 static void __exit
mxser_module_exit(void)
2887 pr_debug("Unloading module mxser ...\n");
2889 pci_unregister_driver(&mxser_driver
);
2891 for (i
= 0; i
< MXSER_BOARDS
; i
++) /* ISA remains */
2892 if (mxser_boards
[i
].info
!= NULL
)
2893 for (j
= 0; j
< mxser_boards
[i
].info
->nports
; j
++)
2894 tty_unregister_device(mxvar_sdriver
,
2895 mxser_boards
[i
].idx
+ j
);
2896 tty_unregister_driver(mxvar_sdriver
);
2897 put_tty_driver(mxvar_sdriver
);
2899 for (i
= 0; i
< MXSER_BOARDS
; i
++)
2900 if (mxser_boards
[i
].info
!= NULL
)
2901 mxser_release_res(&mxser_boards
[i
], NULL
, 1);
2903 pr_debug("Done.\n");
2906 module_init(mxser_module_init
);
2907 module_exit(mxser_module_exit
);