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@lxorguk.ukuu.org.uk>. The original 1.8 code is available on
19 * - Fixed x86_64 cleanness
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 "2.0.4" /* 1.12 */
51 #define MXSERMAJOR 174
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 unsigned long ioaddr
[MXSER_BOARDS
];
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
, ulong
, NULL
, 0);
184 MODULE_PARM_DESC(ioaddr
, "ISA io addresses to look for a moxa board");
185 module_param(ttymajor
, int, 0);
186 MODULE_LICENSE("GPL");
190 unsigned long rxcnt
[MXSER_PORTS
];
191 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 struct mxser_board mxser_boards
[MXSER_BOARDS
];
285 static struct tty_driver
*mxvar_sdriver
;
286 static struct mxser_log mxvar_log
;
287 static int mxser_set_baud_method
[MXSER_PORTS
+ 1];
289 static void mxser_enable_must_enchance_mode(unsigned long baseio
)
294 oldlcr
= inb(baseio
+ UART_LCR
);
295 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
297 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
298 efr
|= MOXA_MUST_EFR_EFRB_ENABLE
;
300 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
301 outb(oldlcr
, baseio
+ UART_LCR
);
304 static void mxser_disable_must_enchance_mode(unsigned long baseio
)
309 oldlcr
= inb(baseio
+ UART_LCR
);
310 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
312 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
313 efr
&= ~MOXA_MUST_EFR_EFRB_ENABLE
;
315 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
316 outb(oldlcr
, baseio
+ UART_LCR
);
319 static void mxser_set_must_xon1_value(unsigned long baseio
, u8 value
)
324 oldlcr
= inb(baseio
+ UART_LCR
);
325 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
327 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
328 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
329 efr
|= MOXA_MUST_EFR_BANK0
;
331 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
332 outb(value
, baseio
+ MOXA_MUST_XON1_REGISTER
);
333 outb(oldlcr
, baseio
+ UART_LCR
);
336 static void mxser_set_must_xoff1_value(unsigned long baseio
, u8 value
)
341 oldlcr
= inb(baseio
+ UART_LCR
);
342 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
344 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
345 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
346 efr
|= MOXA_MUST_EFR_BANK0
;
348 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
349 outb(value
, baseio
+ MOXA_MUST_XOFF1_REGISTER
);
350 outb(oldlcr
, baseio
+ UART_LCR
);
353 static void mxser_set_must_fifo_value(struct mxser_port
*info
)
358 oldlcr
= inb(info
->ioaddr
+ UART_LCR
);
359 outb(MOXA_MUST_ENTER_ENCHANCE
, info
->ioaddr
+ UART_LCR
);
361 efr
= inb(info
->ioaddr
+ MOXA_MUST_EFR_REGISTER
);
362 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
363 efr
|= MOXA_MUST_EFR_BANK1
;
365 outb(efr
, info
->ioaddr
+ MOXA_MUST_EFR_REGISTER
);
366 outb((u8
)info
->rx_high_water
, info
->ioaddr
+ MOXA_MUST_RBRTH_REGISTER
);
367 outb((u8
)info
->rx_trigger
, info
->ioaddr
+ MOXA_MUST_RBRTI_REGISTER
);
368 outb((u8
)info
->rx_low_water
, info
->ioaddr
+ MOXA_MUST_RBRTL_REGISTER
);
369 outb(oldlcr
, info
->ioaddr
+ UART_LCR
);
372 static void mxser_set_must_enum_value(unsigned long baseio
, u8 value
)
377 oldlcr
= inb(baseio
+ UART_LCR
);
378 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
380 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
381 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
382 efr
|= MOXA_MUST_EFR_BANK2
;
384 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
385 outb(value
, baseio
+ MOXA_MUST_ENUM_REGISTER
);
386 outb(oldlcr
, baseio
+ UART_LCR
);
389 static void mxser_get_must_hardware_id(unsigned long baseio
, u8
*pId
)
394 oldlcr
= inb(baseio
+ UART_LCR
);
395 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
397 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
398 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
399 efr
|= MOXA_MUST_EFR_BANK2
;
401 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
402 *pId
= inb(baseio
+ MOXA_MUST_HWID_REGISTER
);
403 outb(oldlcr
, baseio
+ UART_LCR
);
406 static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio
)
411 oldlcr
= inb(baseio
+ UART_LCR
);
412 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
414 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
415 efr
&= ~MOXA_MUST_EFR_SF_MASK
;
417 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
418 outb(oldlcr
, baseio
+ UART_LCR
);
421 static void mxser_enable_must_tx_software_flow_control(unsigned long baseio
)
426 oldlcr
= inb(baseio
+ UART_LCR
);
427 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
429 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
430 efr
&= ~MOXA_MUST_EFR_SF_TX_MASK
;
431 efr
|= MOXA_MUST_EFR_SF_TX1
;
433 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
434 outb(oldlcr
, baseio
+ UART_LCR
);
437 static void mxser_disable_must_tx_software_flow_control(unsigned long baseio
)
442 oldlcr
= inb(baseio
+ UART_LCR
);
443 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
445 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
446 efr
&= ~MOXA_MUST_EFR_SF_TX_MASK
;
448 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
449 outb(oldlcr
, baseio
+ UART_LCR
);
452 static void mxser_enable_must_rx_software_flow_control(unsigned long baseio
)
457 oldlcr
= inb(baseio
+ UART_LCR
);
458 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
460 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
461 efr
&= ~MOXA_MUST_EFR_SF_RX_MASK
;
462 efr
|= MOXA_MUST_EFR_SF_RX1
;
464 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
465 outb(oldlcr
, baseio
+ UART_LCR
);
468 static void mxser_disable_must_rx_software_flow_control(unsigned long baseio
)
473 oldlcr
= inb(baseio
+ UART_LCR
);
474 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
476 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
477 efr
&= ~MOXA_MUST_EFR_SF_RX_MASK
;
479 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
480 outb(oldlcr
, baseio
+ UART_LCR
);
484 static int __devinit
CheckIsMoxaMust(unsigned long io
)
489 outb(0, io
+ UART_LCR
);
490 mxser_disable_must_enchance_mode(io
);
491 oldmcr
= inb(io
+ UART_MCR
);
492 outb(0, io
+ UART_MCR
);
493 mxser_set_must_xon1_value(io
, 0x11);
494 if ((hwid
= inb(io
+ UART_MCR
)) != 0) {
495 outb(oldmcr
, io
+ UART_MCR
);
496 return MOXA_OTHER_UART
;
499 mxser_get_must_hardware_id(io
, &hwid
);
500 for (i
= 1; i
< UART_INFO_NUM
; i
++) { /* 0 = OTHER_UART */
501 if (hwid
== Gpci_uart_info
[i
].type
)
504 return MOXA_OTHER_UART
;
508 static void process_txrx_fifo(struct mxser_port
*info
)
512 if ((info
->type
== PORT_16450
) || (info
->type
== PORT_8250
)) {
513 info
->rx_trigger
= 1;
514 info
->rx_high_water
= 1;
515 info
->rx_low_water
= 1;
516 info
->xmit_fifo_size
= 1;
518 for (i
= 0; i
< UART_INFO_NUM
; i
++)
519 if (info
->board
->chip_flag
== Gpci_uart_info
[i
].type
) {
520 info
->rx_trigger
= Gpci_uart_info
[i
].rx_trigger
;
521 info
->rx_low_water
= Gpci_uart_info
[i
].rx_low_water
;
522 info
->rx_high_water
= Gpci_uart_info
[i
].rx_high_water
;
523 info
->xmit_fifo_size
= Gpci_uart_info
[i
].xmit_fifo_size
;
528 static unsigned char mxser_get_msr(int baseaddr
, int mode
, int port
)
530 static unsigned char mxser_msr
[MXSER_PORTS
+ 1];
531 unsigned char status
= 0;
533 status
= inb(baseaddr
+ UART_MSR
);
535 mxser_msr
[port
] &= 0x0F;
536 mxser_msr
[port
] |= status
;
537 status
= mxser_msr
[port
];
544 static int mxser_block_til_ready(struct tty_struct
*tty
, struct file
*filp
,
545 struct mxser_port
*port
)
547 DECLARE_WAITQUEUE(wait
, current
);
553 * If non-blocking mode is set, or the port is not enabled,
554 * then make the check up front and then exit.
556 if ((filp
->f_flags
& O_NONBLOCK
) ||
557 test_bit(TTY_IO_ERROR
, &tty
->flags
)) {
558 port
->port
.flags
|= ASYNC_NORMAL_ACTIVE
;
562 if (tty
->termios
->c_cflag
& CLOCAL
)
566 * Block waiting for the carrier detect and the line to become
567 * free (i.e., not in use by the callout). While we are in
568 * this loop, port->port.count is dropped by one, so that
569 * mxser_close() knows when to free things. We restore it upon
570 * exit, either normal or abnormal.
573 add_wait_queue(&port
->port
.open_wait
, &wait
);
575 spin_lock_irqsave(&port
->slock
, flags
);
576 if (!tty_hung_up_p(filp
))
578 spin_unlock_irqrestore(&port
->slock
, flags
);
579 port
->port
.blocked_open
++;
581 spin_lock_irqsave(&port
->slock
, flags
);
582 outb(inb(port
->ioaddr
+ UART_MCR
) |
583 UART_MCR_DTR
| UART_MCR_RTS
, port
->ioaddr
+ UART_MCR
);
584 spin_unlock_irqrestore(&port
->slock
, flags
);
585 set_current_state(TASK_INTERRUPTIBLE
);
586 if (tty_hung_up_p(filp
) || !(port
->port
.flags
& ASYNC_INITIALIZED
)) {
587 if (port
->port
.flags
& ASYNC_HUP_NOTIFY
)
590 retval
= -ERESTARTSYS
;
593 if (!(port
->port
.flags
& ASYNC_CLOSING
) &&
595 (inb(port
->ioaddr
+ UART_MSR
) & UART_MSR_DCD
)))
597 if (signal_pending(current
)) {
598 retval
= -ERESTARTSYS
;
603 set_current_state(TASK_RUNNING
);
604 remove_wait_queue(&port
->port
.open_wait
, &wait
);
605 if (!tty_hung_up_p(filp
))
607 port
->port
.blocked_open
--;
610 port
->port
.flags
|= ASYNC_NORMAL_ACTIVE
;
614 static int mxser_set_baud(struct tty_struct
*tty
, long newspd
)
616 struct mxser_port
*info
= tty
->driver_data
;
623 if (newspd
> info
->max_baud
)
627 quot
= 2 * info
->baud_base
/ 269;
628 tty_encode_baud_rate(tty
, 134, 134);
630 quot
= info
->baud_base
/ newspd
;
633 baud
= info
->baud_base
/quot
;
634 tty_encode_baud_rate(tty
, baud
, baud
);
639 info
->timeout
= ((info
->xmit_fifo_size
* HZ
* 10 * quot
) / info
->baud_base
);
640 info
->timeout
+= HZ
/ 50; /* Add .02 seconds of slop */
643 info
->MCR
|= UART_MCR_DTR
;
644 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
646 info
->MCR
&= ~UART_MCR_DTR
;
647 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
651 cval
= inb(info
->ioaddr
+ UART_LCR
);
653 outb(cval
| UART_LCR_DLAB
, info
->ioaddr
+ UART_LCR
); /* set DLAB */
655 outb(quot
& 0xff, info
->ioaddr
+ UART_DLL
); /* LS of divisor */
656 outb(quot
>> 8, info
->ioaddr
+ UART_DLM
); /* MS of divisor */
657 outb(cval
, info
->ioaddr
+ UART_LCR
); /* reset DLAB */
660 if (C_BAUD(tty
) == BOTHER
) {
661 quot
= info
->baud_base
% newspd
;
663 if (quot
% newspd
> newspd
/ 2) {
669 mxser_set_must_enum_value(info
->ioaddr
, quot
);
672 mxser_set_must_enum_value(info
->ioaddr
, 0);
678 * This routine is called to set the UART divisor registers to match
679 * the specified baud rate for a serial port.
681 static int mxser_change_speed(struct tty_struct
*tty
,
682 struct ktermios
*old_termios
)
684 struct mxser_port
*info
= tty
->driver_data
;
685 unsigned cflag
, cval
, fcr
;
687 unsigned char status
;
689 cflag
= tty
->termios
->c_cflag
;
693 if (mxser_set_baud_method
[tty
->index
] == 0)
694 mxser_set_baud(tty
, tty_get_baud_rate(tty
));
696 /* byte size and parity */
697 switch (cflag
& CSIZE
) {
712 break; /* too keep GCC shut... */
717 cval
|= UART_LCR_PARITY
;
718 if (!(cflag
& PARODD
))
719 cval
|= UART_LCR_EPAR
;
721 cval
|= UART_LCR_SPAR
;
723 if ((info
->type
== PORT_8250
) || (info
->type
== PORT_16450
)) {
724 if (info
->board
->chip_flag
) {
725 fcr
= UART_FCR_ENABLE_FIFO
;
726 fcr
|= MOXA_MUST_FCR_GDA_MODE_ENABLE
;
727 mxser_set_must_fifo_value(info
);
731 fcr
= UART_FCR_ENABLE_FIFO
;
732 if (info
->board
->chip_flag
) {
733 fcr
|= MOXA_MUST_FCR_GDA_MODE_ENABLE
;
734 mxser_set_must_fifo_value(info
);
736 switch (info
->rx_trigger
) {
738 fcr
|= UART_FCR_TRIGGER_1
;
741 fcr
|= UART_FCR_TRIGGER_4
;
744 fcr
|= UART_FCR_TRIGGER_8
;
747 fcr
|= UART_FCR_TRIGGER_14
;
753 /* CTS flow control flag and modem status interrupts */
754 info
->IER
&= ~UART_IER_MSI
;
755 info
->MCR
&= ~UART_MCR_AFE
;
756 if (cflag
& CRTSCTS
) {
757 info
->port
.flags
|= ASYNC_CTS_FLOW
;
758 info
->IER
|= UART_IER_MSI
;
759 if ((info
->type
== PORT_16550A
) || (info
->board
->chip_flag
)) {
760 info
->MCR
|= UART_MCR_AFE
;
762 status
= inb(info
->ioaddr
+ UART_MSR
);
763 if (tty
->hw_stopped
) {
764 if (status
& UART_MSR_CTS
) {
766 if (info
->type
!= PORT_16550A
&&
767 !info
->board
->chip_flag
) {
768 outb(info
->IER
& ~UART_IER_THRI
,
771 info
->IER
|= UART_IER_THRI
;
772 outb(info
->IER
, info
->ioaddr
+
778 if (!(status
& UART_MSR_CTS
)) {
780 if ((info
->type
!= PORT_16550A
) &&
781 (!info
->board
->chip_flag
)) {
782 info
->IER
&= ~UART_IER_THRI
;
783 outb(info
->IER
, info
->ioaddr
+
790 info
->port
.flags
&= ~ASYNC_CTS_FLOW
;
792 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
793 if (cflag
& CLOCAL
) {
794 info
->port
.flags
&= ~ASYNC_CHECK_CD
;
796 info
->port
.flags
|= ASYNC_CHECK_CD
;
797 info
->IER
|= UART_IER_MSI
;
799 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
802 * Set up parity check flag
804 info
->read_status_mask
= UART_LSR_OE
| UART_LSR_THRE
| UART_LSR_DR
;
806 info
->read_status_mask
|= UART_LSR_FE
| UART_LSR_PE
;
807 if (I_BRKINT(tty
) || I_PARMRK(tty
))
808 info
->read_status_mask
|= UART_LSR_BI
;
810 info
->ignore_status_mask
= 0;
813 info
->ignore_status_mask
|= UART_LSR_BI
;
814 info
->read_status_mask
|= UART_LSR_BI
;
816 * If we're ignore parity and break indicators, ignore
817 * overruns too. (For real raw support).
820 info
->ignore_status_mask
|=
824 info
->read_status_mask
|=
830 if (info
->board
->chip_flag
) {
831 mxser_set_must_xon1_value(info
->ioaddr
, START_CHAR(tty
));
832 mxser_set_must_xoff1_value(info
->ioaddr
, STOP_CHAR(tty
));
834 mxser_enable_must_rx_software_flow_control(
837 mxser_disable_must_rx_software_flow_control(
841 mxser_enable_must_tx_software_flow_control(
844 mxser_disable_must_tx_software_flow_control(
850 outb(fcr
, info
->ioaddr
+ UART_FCR
); /* set fcr */
851 outb(cval
, info
->ioaddr
+ UART_LCR
);
856 static void mxser_check_modem_status(struct tty_struct
*tty
,
857 struct mxser_port
*port
, int status
)
859 /* update input line counters */
860 if (status
& UART_MSR_TERI
)
862 if (status
& UART_MSR_DDSR
)
864 if (status
& UART_MSR_DDCD
)
866 if (status
& UART_MSR_DCTS
)
868 port
->mon_data
.modem_status
= status
;
869 wake_up_interruptible(&port
->delta_msr_wait
);
871 if ((port
->port
.flags
& ASYNC_CHECK_CD
) && (status
& UART_MSR_DDCD
)) {
872 if (status
& UART_MSR_DCD
)
873 wake_up_interruptible(&port
->port
.open_wait
);
876 tty
= tty_port_tty_get(&port
->port
);
877 if (port
->port
.flags
& ASYNC_CTS_FLOW
) {
878 if (tty
->hw_stopped
) {
879 if (status
& UART_MSR_CTS
) {
882 if ((port
->type
!= PORT_16550A
) &&
883 (!port
->board
->chip_flag
)) {
884 outb(port
->IER
& ~UART_IER_THRI
,
885 port
->ioaddr
+ UART_IER
);
886 port
->IER
|= UART_IER_THRI
;
887 outb(port
->IER
, port
->ioaddr
+
893 if (!(status
& UART_MSR_CTS
)) {
895 if (port
->type
!= PORT_16550A
&&
896 !port
->board
->chip_flag
) {
897 port
->IER
&= ~UART_IER_THRI
;
898 outb(port
->IER
, port
->ioaddr
+
906 static int mxser_startup(struct tty_struct
*tty
)
908 struct mxser_port
*info
= tty
->driver_data
;
912 page
= __get_free_page(GFP_KERNEL
);
916 spin_lock_irqsave(&info
->slock
, flags
);
918 if (info
->port
.flags
& ASYNC_INITIALIZED
) {
920 spin_unlock_irqrestore(&info
->slock
, flags
);
924 if (!info
->ioaddr
|| !info
->type
) {
925 set_bit(TTY_IO_ERROR
, &tty
->flags
);
927 spin_unlock_irqrestore(&info
->slock
, flags
);
930 if (info
->port
.xmit_buf
)
933 info
->port
.xmit_buf
= (unsigned char *) page
;
936 * Clear the FIFO buffers and disable them
937 * (they will be reenabled in mxser_change_speed())
939 if (info
->board
->chip_flag
)
940 outb((UART_FCR_CLEAR_RCVR
|
941 UART_FCR_CLEAR_XMIT
|
942 MOXA_MUST_FCR_GDA_MODE_ENABLE
), info
->ioaddr
+ UART_FCR
);
944 outb((UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
),
945 info
->ioaddr
+ UART_FCR
);
948 * At this point there's no way the LSR could still be 0xFF;
949 * if it is, then bail out, because there's likely no UART
952 if (inb(info
->ioaddr
+ UART_LSR
) == 0xff) {
953 spin_unlock_irqrestore(&info
->slock
, flags
);
954 if (capable(CAP_SYS_ADMIN
)) {
956 set_bit(TTY_IO_ERROR
, &tty
->flags
);
963 * Clear the interrupt registers.
965 (void) inb(info
->ioaddr
+ UART_LSR
);
966 (void) inb(info
->ioaddr
+ UART_RX
);
967 (void) inb(info
->ioaddr
+ UART_IIR
);
968 (void) inb(info
->ioaddr
+ UART_MSR
);
971 * Now, initialize the UART
973 outb(UART_LCR_WLEN8
, info
->ioaddr
+ UART_LCR
); /* reset DLAB */
974 info
->MCR
= UART_MCR_DTR
| UART_MCR_RTS
;
975 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
978 * Finally, enable interrupts
980 info
->IER
= UART_IER_MSI
| UART_IER_RLSI
| UART_IER_RDI
;
982 if (info
->board
->chip_flag
)
983 info
->IER
|= MOXA_MUST_IER_EGDAI
;
984 outb(info
->IER
, info
->ioaddr
+ UART_IER
); /* enable interrupts */
987 * And clear the interrupt registers again for luck.
989 (void) inb(info
->ioaddr
+ UART_LSR
);
990 (void) inb(info
->ioaddr
+ UART_RX
);
991 (void) inb(info
->ioaddr
+ UART_IIR
);
992 (void) inb(info
->ioaddr
+ UART_MSR
);
994 clear_bit(TTY_IO_ERROR
, &tty
->flags
);
995 info
->xmit_cnt
= info
->xmit_head
= info
->xmit_tail
= 0;
998 * and set the speed of the serial port
1000 mxser_change_speed(tty
, NULL
);
1001 info
->port
.flags
|= ASYNC_INITIALIZED
;
1002 spin_unlock_irqrestore(&info
->slock
, flags
);
1008 * This routine will shutdown a serial port; interrupts maybe disabled, and
1009 * DTR is dropped if the hangup on close termio flag is on.
1011 static void mxser_shutdown(struct tty_struct
*tty
)
1013 struct mxser_port
*info
= tty
->driver_data
;
1014 unsigned long flags
;
1016 if (!(info
->port
.flags
& ASYNC_INITIALIZED
))
1019 spin_lock_irqsave(&info
->slock
, flags
);
1022 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
1023 * here so the queue might never be waken up
1025 wake_up_interruptible(&info
->delta_msr_wait
);
1028 * Free the IRQ, if necessary
1030 if (info
->port
.xmit_buf
) {
1031 free_page((unsigned long) info
->port
.xmit_buf
);
1032 info
->port
.xmit_buf
= NULL
;
1036 outb(0x00, info
->ioaddr
+ UART_IER
);
1038 if (tty
->termios
->c_cflag
& HUPCL
)
1039 info
->MCR
&= ~(UART_MCR_DTR
| UART_MCR_RTS
);
1040 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
1042 /* clear Rx/Tx FIFO's */
1043 if (info
->board
->chip_flag
)
1044 outb(UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
|
1045 MOXA_MUST_FCR_GDA_MODE_ENABLE
,
1046 info
->ioaddr
+ UART_FCR
);
1048 outb(UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
,
1049 info
->ioaddr
+ UART_FCR
);
1051 /* read data port to reset things */
1052 (void) inb(info
->ioaddr
+ UART_RX
);
1054 set_bit(TTY_IO_ERROR
, &tty
->flags
);
1056 info
->port
.flags
&= ~ASYNC_INITIALIZED
;
1058 if (info
->board
->chip_flag
)
1059 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info
->ioaddr
);
1061 spin_unlock_irqrestore(&info
->slock
, flags
);
1065 * This routine is called whenever a serial port is opened. It
1066 * enables interrupts for a serial port, linking in its async structure into
1067 * the IRQ chain. It also performs the serial-specific
1068 * initialization for the tty structure.
1070 static int mxser_open(struct tty_struct
*tty
, struct file
*filp
)
1072 struct mxser_port
*info
;
1073 unsigned long flags
;
1077 if (line
== MXSER_PORTS
)
1079 if (line
< 0 || line
> MXSER_PORTS
)
1081 info
= &mxser_boards
[line
/ MXSER_PORTS_PER_BOARD
].ports
[line
% MXSER_PORTS_PER_BOARD
];
1085 tty
->driver_data
= info
;
1086 tty_port_tty_set(&info
->port
, tty
);
1088 * Start up serial port
1090 spin_lock_irqsave(&info
->slock
, flags
);
1092 spin_unlock_irqrestore(&info
->slock
, flags
);
1093 retval
= mxser_startup(tty
);
1097 retval
= mxser_block_til_ready(tty
, filp
, info
);
1101 /* unmark here for very high baud rate (ex. 921600 bps) used */
1102 tty
->low_latency
= 1;
1106 static void mxser_flush_buffer(struct tty_struct
*tty
)
1108 struct mxser_port
*info
= tty
->driver_data
;
1110 unsigned long flags
;
1113 spin_lock_irqsave(&info
->slock
, flags
);
1114 info
->xmit_cnt
= info
->xmit_head
= info
->xmit_tail
= 0;
1116 fcr
= inb(info
->ioaddr
+ UART_FCR
);
1117 outb((fcr
| UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
),
1118 info
->ioaddr
+ UART_FCR
);
1119 outb(fcr
, info
->ioaddr
+ UART_FCR
);
1121 spin_unlock_irqrestore(&info
->slock
, flags
);
1128 * This routine is called when the serial port gets closed. First, we
1129 * wait for the last remaining data to be sent. Then, we unlink its
1130 * async structure from the interrupt chain if necessary, and we free
1131 * that IRQ if nothing is left in the chain.
1133 static void mxser_close(struct tty_struct
*tty
, struct file
*filp
)
1135 struct mxser_port
*info
= tty
->driver_data
;
1137 unsigned long timeout
;
1138 unsigned long flags
;
1140 if (tty
->index
== MXSER_PORTS
)
1145 spin_lock_irqsave(&info
->slock
, flags
);
1147 if (tty_hung_up_p(filp
)) {
1148 spin_unlock_irqrestore(&info
->slock
, flags
);
1151 if ((tty
->count
== 1) && (info
->port
.count
!= 1)) {
1153 * Uh, oh. tty->count is 1, which means that the tty
1154 * structure will be freed. Info->port.count should always
1155 * be one in these conditions. If it's greater than
1156 * one, we've got real problems, since it means the
1157 * serial port won't be shutdown.
1159 printk(KERN_ERR
"mxser_close: bad serial port count; "
1160 "tty->count is 1, info->port.count is %d\n", info
->port
.count
);
1161 info
->port
.count
= 1;
1163 if (--info
->port
.count
< 0) {
1164 printk(KERN_ERR
"mxser_close: bad serial port count for "
1165 "ttys%d: %d\n", tty
->index
, info
->port
.count
);
1166 info
->port
.count
= 0;
1168 if (info
->port
.count
) {
1169 spin_unlock_irqrestore(&info
->slock
, flags
);
1172 info
->port
.flags
|= ASYNC_CLOSING
;
1173 spin_unlock_irqrestore(&info
->slock
, flags
);
1175 * Save the termios structure, since this port may have
1176 * separate termios for callout and dialin.
1178 if (info
->port
.flags
& ASYNC_NORMAL_ACTIVE
)
1179 info
->normal_termios
= *tty
->termios
;
1181 * Now we wait for the transmit buffer to clear; and we notify
1182 * the line discipline to only process XON/XOFF characters.
1185 if (info
->port
.closing_wait
!= ASYNC_CLOSING_WAIT_NONE
)
1186 tty_wait_until_sent(tty
, info
->port
.closing_wait
);
1188 * At this point we stop accepting input. To do this, we
1189 * disable the receive line status interrupts, and tell the
1190 * interrupt driver to stop checking the data ready bit in the
1191 * line status register.
1193 info
->IER
&= ~UART_IER_RLSI
;
1194 if (info
->board
->chip_flag
)
1195 info
->IER
&= ~MOXA_MUST_RECV_ISR
;
1197 if (info
->port
.flags
& ASYNC_INITIALIZED
) {
1198 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1200 * Before we drop DTR, make sure the UART transmitter
1201 * has completely drained; this is especially
1202 * important if there is a transmit FIFO!
1204 timeout
= jiffies
+ HZ
;
1205 while (!(inb(info
->ioaddr
+ UART_LSR
) & UART_LSR_TEMT
)) {
1206 schedule_timeout_interruptible(5);
1207 if (time_after(jiffies
, timeout
))
1211 mxser_shutdown(tty
);
1213 mxser_flush_buffer(tty
);
1214 tty_ldisc_flush(tty
);
1217 tty_port_tty_set(&info
->port
, NULL
);
1218 if (info
->port
.blocked_open
) {
1219 if (info
->port
.close_delay
)
1220 schedule_timeout_interruptible(info
->port
.close_delay
);
1221 wake_up_interruptible(&info
->port
.open_wait
);
1224 info
->port
.flags
&= ~(ASYNC_NORMAL_ACTIVE
| ASYNC_CLOSING
);
1227 static int mxser_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
1230 struct mxser_port
*info
= tty
->driver_data
;
1231 unsigned long flags
;
1233 if (!info
->port
.xmit_buf
)
1237 c
= min_t(int, count
, min(SERIAL_XMIT_SIZE
- info
->xmit_cnt
- 1,
1238 SERIAL_XMIT_SIZE
- info
->xmit_head
));
1242 memcpy(info
->port
.xmit_buf
+ info
->xmit_head
, buf
, c
);
1243 spin_lock_irqsave(&info
->slock
, flags
);
1244 info
->xmit_head
= (info
->xmit_head
+ c
) &
1245 (SERIAL_XMIT_SIZE
- 1);
1246 info
->xmit_cnt
+= c
;
1247 spin_unlock_irqrestore(&info
->slock
, flags
);
1254 if (info
->xmit_cnt
&& !tty
->stopped
) {
1255 if (!tty
->hw_stopped
||
1256 (info
->type
== PORT_16550A
) ||
1257 (info
->board
->chip_flag
)) {
1258 spin_lock_irqsave(&info
->slock
, flags
);
1259 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+
1261 info
->IER
|= UART_IER_THRI
;
1262 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1263 spin_unlock_irqrestore(&info
->slock
, flags
);
1269 static int mxser_put_char(struct tty_struct
*tty
, unsigned char ch
)
1271 struct mxser_port
*info
= tty
->driver_data
;
1272 unsigned long flags
;
1274 if (!info
->port
.xmit_buf
)
1277 if (info
->xmit_cnt
>= SERIAL_XMIT_SIZE
- 1)
1280 spin_lock_irqsave(&info
->slock
, flags
);
1281 info
->port
.xmit_buf
[info
->xmit_head
++] = ch
;
1282 info
->xmit_head
&= SERIAL_XMIT_SIZE
- 1;
1284 spin_unlock_irqrestore(&info
->slock
, flags
);
1285 if (!tty
->stopped
) {
1286 if (!tty
->hw_stopped
||
1287 (info
->type
== PORT_16550A
) ||
1288 info
->board
->chip_flag
) {
1289 spin_lock_irqsave(&info
->slock
, flags
);
1290 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
1291 info
->IER
|= UART_IER_THRI
;
1292 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1293 spin_unlock_irqrestore(&info
->slock
, flags
);
1300 static void mxser_flush_chars(struct tty_struct
*tty
)
1302 struct mxser_port
*info
= tty
->driver_data
;
1303 unsigned long flags
;
1305 if (info
->xmit_cnt
<= 0 || tty
->stopped
|| !info
->port
.xmit_buf
||
1306 (tty
->hw_stopped
&& info
->type
!= PORT_16550A
&&
1307 !info
->board
->chip_flag
))
1310 spin_lock_irqsave(&info
->slock
, flags
);
1312 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
1313 info
->IER
|= UART_IER_THRI
;
1314 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1316 spin_unlock_irqrestore(&info
->slock
, flags
);
1319 static int mxser_write_room(struct tty_struct
*tty
)
1321 struct mxser_port
*info
= tty
->driver_data
;
1324 ret
= SERIAL_XMIT_SIZE
- info
->xmit_cnt
- 1;
1325 return ret
< 0 ? 0 : ret
;
1328 static int mxser_chars_in_buffer(struct tty_struct
*tty
)
1330 struct mxser_port
*info
= tty
->driver_data
;
1331 return info
->xmit_cnt
;
1335 * ------------------------------------------------------------
1336 * friends of mxser_ioctl()
1337 * ------------------------------------------------------------
1339 static int mxser_get_serial_info(struct tty_struct
*tty
,
1340 struct serial_struct __user
*retinfo
)
1342 struct mxser_port
*info
= tty
->driver_data
;
1343 struct serial_struct tmp
= {
1346 .port
= info
->ioaddr
,
1347 .irq
= info
->board
->irq
,
1348 .flags
= info
->port
.flags
,
1349 .baud_base
= info
->baud_base
,
1350 .close_delay
= info
->port
.close_delay
,
1351 .closing_wait
= info
->port
.closing_wait
,
1352 .custom_divisor
= info
->custom_divisor
,
1355 if (copy_to_user(retinfo
, &tmp
, sizeof(*retinfo
)))
1360 static int mxser_set_serial_info(struct tty_struct
*tty
,
1361 struct serial_struct __user
*new_info
)
1363 struct mxser_port
*info
= tty
->driver_data
;
1364 struct serial_struct new_serial
;
1366 unsigned long sl_flags
;
1370 if (!new_info
|| !info
->ioaddr
)
1372 if (copy_from_user(&new_serial
, new_info
, sizeof(new_serial
)))
1375 if (new_serial
.irq
!= info
->board
->irq
||
1376 new_serial
.port
!= info
->ioaddr
)
1379 flags
= info
->port
.flags
& ASYNC_SPD_MASK
;
1381 if (!capable(CAP_SYS_ADMIN
)) {
1382 if ((new_serial
.baud_base
!= info
->baud_base
) ||
1383 (new_serial
.close_delay
!= info
->port
.close_delay
) ||
1384 ((new_serial
.flags
& ~ASYNC_USR_MASK
) != (info
->port
.flags
& ~ASYNC_USR_MASK
)))
1386 info
->port
.flags
= ((info
->port
.flags
& ~ASYNC_USR_MASK
) |
1387 (new_serial
.flags
& ASYNC_USR_MASK
));
1390 * OK, past this point, all the error checking has been done.
1391 * At this point, we start making changes.....
1393 info
->port
.flags
= ((info
->port
.flags
& ~ASYNC_FLAGS
) |
1394 (new_serial
.flags
& ASYNC_FLAGS
));
1395 info
->port
.close_delay
= new_serial
.close_delay
* HZ
/ 100;
1396 info
->port
.closing_wait
= new_serial
.closing_wait
* HZ
/ 100;
1397 tty
->low_latency
= (info
->port
.flags
& ASYNC_LOW_LATENCY
)
1399 if ((info
->port
.flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_CUST
&&
1400 (new_serial
.baud_base
!= info
->baud_base
||
1401 new_serial
.custom_divisor
!=
1402 info
->custom_divisor
)) {
1403 baud
= new_serial
.baud_base
/ new_serial
.custom_divisor
;
1404 tty_encode_baud_rate(tty
, baud
, baud
);
1408 info
->type
= new_serial
.type
;
1410 process_txrx_fifo(info
);
1412 if (info
->port
.flags
& ASYNC_INITIALIZED
) {
1413 if (flags
!= (info
->port
.flags
& ASYNC_SPD_MASK
)) {
1414 spin_lock_irqsave(&info
->slock
, sl_flags
);
1415 mxser_change_speed(tty
, NULL
);
1416 spin_unlock_irqrestore(&info
->slock
, sl_flags
);
1419 retval
= mxser_startup(tty
);
1425 * mxser_get_lsr_info - get line status register info
1427 * Purpose: Let user call ioctl() to get info when the UART physically
1428 * is emptied. On bus types like RS485, the transmitter must
1429 * release the bus after transmitting. This must be done when
1430 * the transmit shift register is empty, not be done when the
1431 * transmit holding register is empty. This functionality
1432 * allows an RS485 driver to be written in user space.
1434 static int mxser_get_lsr_info(struct mxser_port
*info
,
1435 unsigned int __user
*value
)
1437 unsigned char status
;
1438 unsigned int result
;
1439 unsigned long flags
;
1441 spin_lock_irqsave(&info
->slock
, flags
);
1442 status
= inb(info
->ioaddr
+ UART_LSR
);
1443 spin_unlock_irqrestore(&info
->slock
, flags
);
1444 result
= ((status
& UART_LSR_TEMT
) ? TIOCSER_TEMT
: 0);
1445 return put_user(result
, value
);
1448 static int mxser_tiocmget(struct tty_struct
*tty
, struct file
*file
)
1450 struct mxser_port
*info
= tty
->driver_data
;
1451 unsigned char control
, status
;
1452 unsigned long flags
;
1455 if (tty
->index
== MXSER_PORTS
)
1456 return -ENOIOCTLCMD
;
1457 if (test_bit(TTY_IO_ERROR
, &tty
->flags
))
1460 control
= info
->MCR
;
1462 spin_lock_irqsave(&info
->slock
, flags
);
1463 status
= inb(info
->ioaddr
+ UART_MSR
);
1464 if (status
& UART_MSR_ANY_DELTA
)
1465 mxser_check_modem_status(tty
, info
, status
);
1466 spin_unlock_irqrestore(&info
->slock
, flags
);
1467 return ((control
& UART_MCR_RTS
) ? TIOCM_RTS
: 0) |
1468 ((control
& UART_MCR_DTR
) ? TIOCM_DTR
: 0) |
1469 ((status
& UART_MSR_DCD
) ? TIOCM_CAR
: 0) |
1470 ((status
& UART_MSR_RI
) ? TIOCM_RNG
: 0) |
1471 ((status
& UART_MSR_DSR
) ? TIOCM_DSR
: 0) |
1472 ((status
& UART_MSR_CTS
) ? TIOCM_CTS
: 0);
1475 static int mxser_tiocmset(struct tty_struct
*tty
, struct file
*file
,
1476 unsigned int set
, unsigned int clear
)
1478 struct mxser_port
*info
= tty
->driver_data
;
1479 unsigned long flags
;
1482 if (tty
->index
== MXSER_PORTS
)
1483 return -ENOIOCTLCMD
;
1484 if (test_bit(TTY_IO_ERROR
, &tty
->flags
))
1487 spin_lock_irqsave(&info
->slock
, flags
);
1489 if (set
& TIOCM_RTS
)
1490 info
->MCR
|= UART_MCR_RTS
;
1491 if (set
& TIOCM_DTR
)
1492 info
->MCR
|= UART_MCR_DTR
;
1494 if (clear
& TIOCM_RTS
)
1495 info
->MCR
&= ~UART_MCR_RTS
;
1496 if (clear
& TIOCM_DTR
)
1497 info
->MCR
&= ~UART_MCR_DTR
;
1499 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
1500 spin_unlock_irqrestore(&info
->slock
, flags
);
1504 static int __init
mxser_program_mode(int port
)
1516 id
= inb(port
+ 1) & 0x1F;
1517 if ((id
!= C168_ASIC_ID
) &&
1518 (id
!= C104_ASIC_ID
) &&
1519 (id
!= C102_ASIC_ID
) &&
1520 (id
!= CI132_ASIC_ID
) &&
1521 (id
!= CI134_ASIC_ID
) &&
1522 (id
!= CI104J_ASIC_ID
))
1524 for (i
= 0, j
= 0; i
< 4; i
++) {
1528 } else if ((j
== 1) && (n
== 1)) {
1539 static void __init
mxser_normal_mode(int port
)
1543 outb(0xA5, port
+ 1);
1544 outb(0x80, port
+ 3);
1545 outb(12, port
+ 0); /* 9600 bps */
1547 outb(0x03, port
+ 3); /* 8 data bits */
1548 outb(0x13, port
+ 4); /* loop back mode */
1549 for (i
= 0; i
< 16; i
++) {
1551 if ((n
& 0x61) == 0x60)
1556 outb(0x00, port
+ 4);
1559 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
1560 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
1561 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
1562 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
1563 #define EN_CCMD 0x000 /* Chip's command register */
1564 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
1565 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
1566 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
1567 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
1568 #define EN0_DCFG 0x00E /* Data configuration reg WR */
1569 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
1570 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
1571 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
1572 static int __init
mxser_read_register(int port
, unsigned short *regs
)
1574 int i
, k
, value
, id
;
1577 id
= mxser_program_mode(port
);
1580 for (i
= 0; i
< 14; i
++) {
1581 k
= (i
& 0x3F) | 0x180;
1582 for (j
= 0x100; j
> 0; j
>>= 1) {
1583 outb(CHIP_CS
, port
);
1585 outb(CHIP_CS
| CHIP_DO
, port
);
1586 outb(CHIP_CS
| CHIP_DO
| CHIP_SK
, port
); /* A? bit of read */
1588 outb(CHIP_CS
, port
);
1589 outb(CHIP_CS
| CHIP_SK
, port
); /* A? bit of read */
1594 for (k
= 0, j
= 0x8000; k
< 16; k
++, j
>>= 1) {
1595 outb(CHIP_CS
, port
);
1596 outb(CHIP_CS
| CHIP_SK
, port
);
1597 if (inb(port
) & CHIP_DI
)
1603 mxser_normal_mode(port
);
1607 static int mxser_ioctl_special(unsigned int cmd
, void __user
*argp
)
1609 struct mxser_port
*port
;
1610 struct tty_struct
*tty
;
1616 case MOXA_GET_MAJOR
:
1617 if (printk_ratelimit())
1618 printk(KERN_WARNING
"mxser: '%s' uses deprecated ioctl "
1619 "%x (GET_MAJOR), fix your userspace\n",
1620 current
->comm
, cmd
);
1621 return put_user(ttymajor
, (int __user
*)argp
);
1623 case MOXA_CHKPORTENABLE
:
1626 for (i
= 0; i
< MXSER_BOARDS
; i
++)
1627 for (j
= 0; j
< MXSER_PORTS_PER_BOARD
; j
++)
1628 if (mxser_boards
[i
].ports
[j
].ioaddr
)
1631 return put_user(result
, (unsigned long __user
*)argp
);
1632 case MOXA_GETDATACOUNT
:
1634 if (copy_to_user(argp
, &mxvar_log
, sizeof(mxvar_log
)))
1638 case MOXA_GETMSTATUS
: {
1639 struct mxser_mstatus ms
, __user
*msu
= argp
;
1641 for (i
= 0; i
< MXSER_BOARDS
; i
++)
1642 for (j
= 0; j
< MXSER_PORTS_PER_BOARD
; j
++) {
1643 port
= &mxser_boards
[i
].ports
[j
];
1644 memset(&ms
, 0, sizeof(ms
));
1649 tty
= tty_port_tty_get(&port
->port
);
1651 if (!tty
|| !tty
->termios
)
1652 ms
.cflag
= port
->normal_termios
.c_cflag
;
1654 ms
.cflag
= tty
->termios
->c_cflag
;
1656 status
= inb(port
->ioaddr
+ UART_MSR
);
1657 if (status
& UART_MSR_DCD
)
1659 if (status
& UART_MSR_DSR
)
1661 if (status
& UART_MSR_CTS
)
1664 if (copy_to_user(msu
, &ms
, sizeof(ms
))) {
1673 case MOXA_ASPP_MON_EXT
: {
1674 struct mxser_mon_ext
*me
; /* it's 2k, stack unfriendly */
1675 unsigned int cflag
, iflag
, p
;
1678 me
= kzalloc(sizeof(*me
), GFP_KERNEL
);
1683 for (i
= 0, p
= 0; i
< MXSER_BOARDS
; i
++) {
1684 for (j
= 0; j
< MXSER_PORTS_PER_BOARD
; j
++, p
++) {
1685 if (p
>= ARRAY_SIZE(me
->rx_cnt
)) {
1689 port
= &mxser_boards
[i
].ports
[j
];
1693 status
= mxser_get_msr(port
->ioaddr
, 0, p
);
1695 if (status
& UART_MSR_TERI
)
1697 if (status
& UART_MSR_DDSR
)
1699 if (status
& UART_MSR_DDCD
)
1701 if (status
& UART_MSR_DCTS
)
1704 port
->mon_data
.modem_status
= status
;
1705 me
->rx_cnt
[p
] = port
->mon_data
.rxcnt
;
1706 me
->tx_cnt
[p
] = port
->mon_data
.txcnt
;
1707 me
->up_rxcnt
[p
] = port
->mon_data
.up_rxcnt
;
1708 me
->up_txcnt
[p
] = port
->mon_data
.up_txcnt
;
1709 me
->modem_status
[p
] =
1710 port
->mon_data
.modem_status
;
1711 tty
= tty_port_tty_get(&port
->port
);
1713 if (!tty
|| !tty
->termios
) {
1714 cflag
= port
->normal_termios
.c_cflag
;
1715 iflag
= port
->normal_termios
.c_iflag
;
1716 me
->baudrate
[p
] = tty_termios_baud_rate(&port
->normal_termios
);
1718 cflag
= tty
->termios
->c_cflag
;
1719 iflag
= tty
->termios
->c_iflag
;
1720 me
->baudrate
[p
] = tty_get_baud_rate(tty
);
1724 me
->databits
[p
] = cflag
& CSIZE
;
1725 me
->stopbits
[p
] = cflag
& CSTOPB
;
1726 me
->parity
[p
] = cflag
& (PARENB
| PARODD
|
1729 if (cflag
& CRTSCTS
)
1730 me
->flowctrl
[p
] |= 0x03;
1732 if (iflag
& (IXON
| IXOFF
))
1733 me
->flowctrl
[p
] |= 0x0C;
1735 if (port
->type
== PORT_16550A
)
1738 opmode
= inb(port
->opmode_ioaddr
) >>
1740 opmode
&= OP_MODE_MASK
;
1741 me
->iftype
[p
] = opmode
;
1745 if (copy_to_user(argp
, me
, sizeof(*me
)))
1751 return -ENOIOCTLCMD
;
1756 static int mxser_cflags_changed(struct mxser_port
*info
, unsigned long arg
,
1757 struct async_icount
*cprev
)
1759 struct async_icount cnow
;
1760 unsigned long flags
;
1763 spin_lock_irqsave(&info
->slock
, flags
);
1764 cnow
= info
->icount
; /* atomic copy */
1765 spin_unlock_irqrestore(&info
->slock
, flags
);
1767 ret
= ((arg
& TIOCM_RNG
) && (cnow
.rng
!= cprev
->rng
)) ||
1768 ((arg
& TIOCM_DSR
) && (cnow
.dsr
!= cprev
->dsr
)) ||
1769 ((arg
& TIOCM_CD
) && (cnow
.dcd
!= cprev
->dcd
)) ||
1770 ((arg
& TIOCM_CTS
) && (cnow
.cts
!= cprev
->cts
));
1777 static int mxser_ioctl(struct tty_struct
*tty
, struct file
*file
,
1778 unsigned int cmd
, unsigned long arg
)
1780 struct mxser_port
*info
= tty
->driver_data
;
1781 struct async_icount cnow
;
1782 unsigned long flags
;
1783 void __user
*argp
= (void __user
*)arg
;
1786 if (tty
->index
== MXSER_PORTS
)
1787 return mxser_ioctl_special(cmd
, argp
);
1789 if (cmd
== MOXA_SET_OP_MODE
|| cmd
== MOXA_GET_OP_MODE
) {
1791 unsigned long opmode
;
1792 static unsigned char ModeMask
[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1794 unsigned char val
, mask
;
1797 if (cmd
== MOXA_SET_OP_MODE
) {
1798 if (get_user(opmode
, (int __user
*) argp
))
1800 if (opmode
!= RS232_MODE
&&
1801 opmode
!= RS485_2WIRE_MODE
&&
1802 opmode
!= RS422_MODE
&&
1803 opmode
!= RS485_4WIRE_MODE
)
1808 val
= inb(info
->opmode_ioaddr
);
1810 val
|= (opmode
<< shiftbit
);
1811 outb(val
, info
->opmode_ioaddr
);
1816 opmode
= inb(info
->opmode_ioaddr
) >> shiftbit
;
1817 opmode
&= OP_MODE_MASK
;
1819 if (put_user(opmode
, (int __user
*)argp
))
1825 if (cmd
!= TIOCGSERIAL
&& cmd
!= TIOCMIWAIT
&& cmd
!= TIOCGICOUNT
&&
1826 test_bit(TTY_IO_ERROR
, &tty
->flags
))
1832 retval
= mxser_get_serial_info(tty
, argp
);
1837 retval
= mxser_set_serial_info(tty
, argp
);
1840 case TIOCSERGETLSR
: /* Get line status register */
1841 return mxser_get_lsr_info(info
, argp
);
1843 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1844 * - mask passed in arg for lines of interest
1845 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1846 * Caller should use TIOCGICOUNT to see which one it was
1849 spin_lock_irqsave(&info
->slock
, flags
);
1850 cnow
= info
->icount
; /* note the counters on entry */
1851 spin_unlock_irqrestore(&info
->slock
, flags
);
1853 return wait_event_interruptible(info
->delta_msr_wait
,
1854 mxser_cflags_changed(info
, arg
, &cnow
));
1856 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1857 * Return: write counters to the user passed counter struct
1858 * NB: both 1->0 and 0->1 transitions are counted except for
1859 * RI where only 0->1 is counted.
1862 struct serial_icounter_struct icnt
= { 0 };
1863 spin_lock_irqsave(&info
->slock
, flags
);
1864 cnow
= info
->icount
;
1865 spin_unlock_irqrestore(&info
->slock
, flags
);
1867 icnt
.frame
= cnow
.frame
;
1868 icnt
.brk
= cnow
.brk
;
1869 icnt
.overrun
= cnow
.overrun
;
1870 icnt
.buf_overrun
= cnow
.buf_overrun
;
1871 icnt
.parity
= cnow
.parity
;
1874 icnt
.cts
= cnow
.cts
;
1875 icnt
.dsr
= cnow
.dsr
;
1876 icnt
.rng
= cnow
.rng
;
1877 icnt
.dcd
= cnow
.dcd
;
1879 return copy_to_user(argp
, &icnt
, sizeof(icnt
)) ? -EFAULT
: 0;
1881 case MOXA_HighSpeedOn
:
1882 return put_user(info
->baud_base
!= 115200 ? 1 : 0, (int __user
*)argp
);
1883 case MOXA_SDS_RSTICOUNTER
:
1885 info
->mon_data
.rxcnt
= 0;
1886 info
->mon_data
.txcnt
= 0;
1890 case MOXA_ASPP_OQUEUE
:{
1894 len
= mxser_chars_in_buffer(tty
);
1895 lsr
= inb(info
->ioaddr
+ UART_LSR
) & UART_LSR_TEMT
;
1896 len
+= (lsr
? 0 : 1);
1899 return put_user(len
, (int __user
*)argp
);
1901 case MOXA_ASPP_MON
: {
1905 status
= mxser_get_msr(info
->ioaddr
, 1, tty
->index
);
1906 mxser_check_modem_status(tty
, info
, status
);
1908 mcr
= inb(info
->ioaddr
+ UART_MCR
);
1909 if (mcr
& MOXA_MUST_MCR_XON_FLAG
)
1910 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_XOFFHOLD
;
1912 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_XOFFHOLD
;
1914 if (mcr
& MOXA_MUST_MCR_TX_XON
)
1915 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_XOFFXENT
;
1917 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_XOFFXENT
;
1919 if (tty
->hw_stopped
)
1920 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_CTSHOLD
;
1922 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_CTSHOLD
;
1924 if (copy_to_user(argp
, &info
->mon_data
,
1925 sizeof(struct mxser_mon
)))
1930 case MOXA_ASPP_LSTATUS
: {
1931 if (put_user(info
->err_shadow
, (unsigned char __user
*)argp
))
1934 info
->err_shadow
= 0;
1937 case MOXA_SET_BAUD_METHOD
: {
1940 if (get_user(method
, (int __user
*)argp
))
1942 mxser_set_baud_method
[tty
->index
] = method
;
1943 return put_user(method
, (int __user
*)argp
);
1946 return -ENOIOCTLCMD
;
1951 static void mxser_stoprx(struct tty_struct
*tty
)
1953 struct mxser_port
*info
= tty
->driver_data
;
1955 info
->ldisc_stop_rx
= 1;
1957 if (info
->board
->chip_flag
) {
1958 info
->IER
&= ~MOXA_MUST_RECV_ISR
;
1959 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1961 info
->x_char
= STOP_CHAR(tty
);
1962 outb(0, info
->ioaddr
+ UART_IER
);
1963 info
->IER
|= UART_IER_THRI
;
1964 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1968 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1969 info
->MCR
&= ~UART_MCR_RTS
;
1970 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
1975 * This routine is called by the upper-layer tty layer to signal that
1976 * incoming characters should be throttled.
1978 static void mxser_throttle(struct tty_struct
*tty
)
1983 static void mxser_unthrottle(struct tty_struct
*tty
)
1985 struct mxser_port
*info
= tty
->driver_data
;
1988 info
->ldisc_stop_rx
= 0;
1993 if (info
->board
->chip_flag
) {
1994 info
->IER
|= MOXA_MUST_RECV_ISR
;
1995 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1997 info
->x_char
= START_CHAR(tty
);
1998 outb(0, info
->ioaddr
+ UART_IER
);
1999 info
->IER
|= UART_IER_THRI
;
2000 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
2005 if (tty
->termios
->c_cflag
& CRTSCTS
) {
2006 info
->MCR
|= UART_MCR_RTS
;
2007 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
2012 * mxser_stop() and mxser_start()
2014 * This routines are called before setting or resetting tty->stopped.
2015 * They enable or disable transmitter interrupts, as necessary.
2017 static void mxser_stop(struct tty_struct
*tty
)
2019 struct mxser_port
*info
= tty
->driver_data
;
2020 unsigned long flags
;
2022 spin_lock_irqsave(&info
->slock
, flags
);
2023 if (info
->IER
& UART_IER_THRI
) {
2024 info
->IER
&= ~UART_IER_THRI
;
2025 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
2027 spin_unlock_irqrestore(&info
->slock
, flags
);
2030 static void mxser_start(struct tty_struct
*tty
)
2032 struct mxser_port
*info
= tty
->driver_data
;
2033 unsigned long flags
;
2035 spin_lock_irqsave(&info
->slock
, flags
);
2036 if (info
->xmit_cnt
&& info
->port
.xmit_buf
) {
2037 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
2038 info
->IER
|= UART_IER_THRI
;
2039 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
2041 spin_unlock_irqrestore(&info
->slock
, flags
);
2044 static void mxser_set_termios(struct tty_struct
*tty
, struct ktermios
*old_termios
)
2046 struct mxser_port
*info
= tty
->driver_data
;
2047 unsigned long flags
;
2049 spin_lock_irqsave(&info
->slock
, flags
);
2050 mxser_change_speed(tty
, old_termios
);
2051 spin_unlock_irqrestore(&info
->slock
, flags
);
2053 if ((old_termios
->c_cflag
& CRTSCTS
) &&
2054 !(tty
->termios
->c_cflag
& CRTSCTS
)) {
2055 tty
->hw_stopped
= 0;
2059 /* Handle sw stopped */
2060 if ((old_termios
->c_iflag
& IXON
) &&
2061 !(tty
->termios
->c_iflag
& IXON
)) {
2064 if (info
->board
->chip_flag
) {
2065 spin_lock_irqsave(&info
->slock
, flags
);
2066 mxser_disable_must_rx_software_flow_control(
2068 spin_unlock_irqrestore(&info
->slock
, flags
);
2076 * mxser_wait_until_sent() --- wait until the transmitter is empty
2078 static void mxser_wait_until_sent(struct tty_struct
*tty
, int timeout
)
2080 struct mxser_port
*info
= tty
->driver_data
;
2081 unsigned long orig_jiffies
, char_time
;
2084 if (info
->type
== PORT_UNKNOWN
)
2087 if (info
->xmit_fifo_size
== 0)
2088 return; /* Just in case.... */
2090 orig_jiffies
= jiffies
;
2092 * Set the check interval to be 1/5 of the estimated time to
2093 * send a single character, and make it at least 1. The check
2094 * interval should also be less than the timeout.
2096 * Note: we have to use pretty tight timings here to satisfy
2099 char_time
= (info
->timeout
- HZ
/ 50) / info
->xmit_fifo_size
;
2100 char_time
= char_time
/ 5;
2103 if (timeout
&& timeout
< char_time
)
2104 char_time
= timeout
;
2106 * If the transmitter hasn't cleared in twice the approximate
2107 * amount of time to send the entire FIFO, it probably won't
2108 * ever clear. This assumes the UART isn't doing flow
2109 * control, which is currently the case. Hence, if it ever
2110 * takes longer than info->timeout, this is probably due to a
2111 * UART bug of some kind. So, we clamp the timeout parameter at
2114 if (!timeout
|| timeout
> 2 * info
->timeout
)
2115 timeout
= 2 * info
->timeout
;
2116 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2117 printk(KERN_DEBUG
"In rs_wait_until_sent(%d) check=%lu...",
2118 timeout
, char_time
);
2119 printk("jiff=%lu...", jiffies
);
2122 while (!((lsr
= inb(info
->ioaddr
+ UART_LSR
)) & UART_LSR_TEMT
)) {
2123 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2124 printk("lsr = %d (jiff=%lu)...", lsr
, jiffies
);
2126 schedule_timeout_interruptible(char_time
);
2127 if (signal_pending(current
))
2129 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2132 set_current_state(TASK_RUNNING
);
2135 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2136 printk("lsr = %d (jiff=%lu)...done\n", lsr
, jiffies
);
2141 * This routine is called by tty_hangup() when a hangup is signaled.
2143 static void mxser_hangup(struct tty_struct
*tty
)
2145 struct mxser_port
*info
= tty
->driver_data
;
2147 mxser_flush_buffer(tty
);
2148 mxser_shutdown(tty
);
2149 info
->port
.count
= 0;
2150 info
->port
.flags
&= ~ASYNC_NORMAL_ACTIVE
;
2151 tty_port_tty_set(&info
->port
, NULL
);
2152 wake_up_interruptible(&info
->port
.open_wait
);
2156 * mxser_rs_break() --- routine which turns the break handling on or off
2158 static int mxser_rs_break(struct tty_struct
*tty
, int break_state
)
2160 struct mxser_port
*info
= tty
->driver_data
;
2161 unsigned long flags
;
2163 spin_lock_irqsave(&info
->slock
, flags
);
2164 if (break_state
== -1)
2165 outb(inb(info
->ioaddr
+ UART_LCR
) | UART_LCR_SBC
,
2166 info
->ioaddr
+ UART_LCR
);
2168 outb(inb(info
->ioaddr
+ UART_LCR
) & ~UART_LCR_SBC
,
2169 info
->ioaddr
+ UART_LCR
);
2170 spin_unlock_irqrestore(&info
->slock
, flags
);
2174 static void mxser_receive_chars(struct tty_struct
*tty
,
2175 struct mxser_port
*port
, int *status
)
2177 unsigned char ch
, gdl
;
2183 recv_room
= tty
->receive_room
;
2184 if (recv_room
== 0 && !port
->ldisc_stop_rx
)
2186 if (port
->board
->chip_flag
!= MOXA_OTHER_UART
) {
2188 if (*status
& UART_LSR_SPECIAL
)
2190 if (port
->board
->chip_flag
== MOXA_MUST_MU860_HWID
&&
2191 (*status
& MOXA_MUST_LSR_RERR
))
2193 if (*status
& MOXA_MUST_LSR_RERR
)
2196 gdl
= inb(port
->ioaddr
+ MOXA_MUST_GDL_REGISTER
);
2198 if (port
->board
->chip_flag
== MOXA_MUST_MU150_HWID
)
2199 gdl
&= MOXA_MUST_GDL_MASK
;
2200 if (gdl
>= recv_room
) {
2201 if (!port
->ldisc_stop_rx
)
2205 ch
= inb(port
->ioaddr
+ UART_RX
);
2206 tty_insert_flip_char(tty
, ch
, 0);
2217 ch
= inb(port
->ioaddr
+ UART_RX
);
2218 if (port
->board
->chip_flag
&& (*status
& UART_LSR_OE
))
2219 outb(0x23, port
->ioaddr
+ UART_FCR
);
2220 *status
&= port
->read_status_mask
;
2221 if (*status
& port
->ignore_status_mask
) {
2222 if (++ignored
> 100)
2226 if (*status
& UART_LSR_SPECIAL
) {
2227 if (*status
& UART_LSR_BI
) {
2231 if (port
->port
.flags
& ASYNC_SAK
)
2233 } else if (*status
& UART_LSR_PE
) {
2235 port
->icount
.parity
++;
2236 } else if (*status
& UART_LSR_FE
) {
2238 port
->icount
.frame
++;
2239 } else if (*status
& UART_LSR_OE
) {
2241 port
->icount
.overrun
++;
2245 tty_insert_flip_char(tty
, ch
, flag
);
2247 if (cnt
>= recv_room
) {
2248 if (!port
->ldisc_stop_rx
)
2255 if (port
->board
->chip_flag
)
2258 *status
= inb(port
->ioaddr
+ UART_LSR
);
2259 } while (*status
& UART_LSR_DR
);
2262 mxvar_log
.rxcnt
[tty
->index
] += cnt
;
2263 port
->mon_data
.rxcnt
+= cnt
;
2264 port
->mon_data
.up_rxcnt
+= cnt
;
2267 * We are called from an interrupt context with &port->slock
2268 * being held. Drop it temporarily in order to prevent
2269 * recursive locking.
2271 spin_unlock(&port
->slock
);
2272 tty_flip_buffer_push(tty
);
2273 spin_lock(&port
->slock
);
2276 static void mxser_transmit_chars(struct tty_struct
*tty
, struct mxser_port
*port
)
2281 outb(port
->x_char
, port
->ioaddr
+ UART_TX
);
2283 mxvar_log
.txcnt
[tty
->index
]++;
2284 port
->mon_data
.txcnt
++;
2285 port
->mon_data
.up_txcnt
++;
2290 if (port
->port
.xmit_buf
== NULL
)
2293 if (port
->xmit_cnt
<= 0 || tty
->stopped
||
2295 (port
->type
!= PORT_16550A
) &&
2296 (!port
->board
->chip_flag
))) {
2297 port
->IER
&= ~UART_IER_THRI
;
2298 outb(port
->IER
, port
->ioaddr
+ UART_IER
);
2302 cnt
= port
->xmit_cnt
;
2303 count
= port
->xmit_fifo_size
;
2305 outb(port
->port
.xmit_buf
[port
->xmit_tail
++],
2306 port
->ioaddr
+ UART_TX
);
2307 port
->xmit_tail
= port
->xmit_tail
& (SERIAL_XMIT_SIZE
- 1);
2308 if (--port
->xmit_cnt
<= 0)
2310 } while (--count
> 0);
2311 mxvar_log
.txcnt
[tty
->index
] += (cnt
- port
->xmit_cnt
);
2313 port
->mon_data
.txcnt
+= (cnt
- port
->xmit_cnt
);
2314 port
->mon_data
.up_txcnt
+= (cnt
- port
->xmit_cnt
);
2315 port
->icount
.tx
+= (cnt
- port
->xmit_cnt
);
2317 if (port
->xmit_cnt
< WAKEUP_CHARS
&& tty
)
2320 if (port
->xmit_cnt
<= 0) {
2321 port
->IER
&= ~UART_IER_THRI
;
2322 outb(port
->IER
, port
->ioaddr
+ UART_IER
);
2327 * This is the serial driver's generic interrupt routine
2329 static irqreturn_t
mxser_interrupt(int irq
, void *dev_id
)
2332 struct mxser_board
*brd
= NULL
;
2333 struct mxser_port
*port
;
2334 int max
, irqbits
, bits
, msr
;
2335 unsigned int int_cnt
, pass_counter
= 0;
2336 int handled
= IRQ_NONE
;
2337 struct tty_struct
*tty
;
2339 for (i
= 0; i
< MXSER_BOARDS
; i
++)
2340 if (dev_id
== &mxser_boards
[i
]) {
2345 if (i
== MXSER_BOARDS
)
2349 max
= brd
->info
->nports
;
2350 while (pass_counter
++ < MXSER_ISR_PASS_LIMIT
) {
2351 irqbits
= inb(brd
->vector
) & brd
->vector_mask
;
2352 if (irqbits
== brd
->vector_mask
)
2355 handled
= IRQ_HANDLED
;
2356 for (i
= 0, bits
= 1; i
< max
; i
++, irqbits
|= bits
, bits
<<= 1) {
2357 if (irqbits
== brd
->vector_mask
)
2361 port
= &brd
->ports
[i
];
2364 spin_lock(&port
->slock
);
2366 iir
= inb(port
->ioaddr
+ UART_IIR
);
2367 if (iir
& UART_IIR_NO_INT
)
2369 iir
&= MOXA_MUST_IIR_MASK
;
2370 tty
= tty_port_tty_get(&port
->port
);
2372 (port
->port
.flags
& ASYNC_CLOSING
) ||
2373 !(port
->port
.flags
&
2374 ASYNC_INITIALIZED
)) {
2375 status
= inb(port
->ioaddr
+ UART_LSR
);
2376 outb(0x27, port
->ioaddr
+ UART_FCR
);
2377 inb(port
->ioaddr
+ UART_MSR
);
2382 status
= inb(port
->ioaddr
+ UART_LSR
);
2384 if (status
& UART_LSR_PE
)
2385 port
->err_shadow
|= NPPI_NOTIFY_PARITY
;
2386 if (status
& UART_LSR_FE
)
2387 port
->err_shadow
|= NPPI_NOTIFY_FRAMING
;
2388 if (status
& UART_LSR_OE
)
2390 NPPI_NOTIFY_HW_OVERRUN
;
2391 if (status
& UART_LSR_BI
)
2392 port
->err_shadow
|= NPPI_NOTIFY_BREAK
;
2394 if (port
->board
->chip_flag
) {
2395 if (iir
== MOXA_MUST_IIR_GDA
||
2396 iir
== MOXA_MUST_IIR_RDA
||
2397 iir
== MOXA_MUST_IIR_RTO
||
2398 iir
== MOXA_MUST_IIR_LSR
)
2399 mxser_receive_chars(tty
, port
,
2403 status
&= port
->read_status_mask
;
2404 if (status
& UART_LSR_DR
)
2405 mxser_receive_chars(tty
, port
,
2408 msr
= inb(port
->ioaddr
+ UART_MSR
);
2409 if (msr
& UART_MSR_ANY_DELTA
)
2410 mxser_check_modem_status(tty
, port
, msr
);
2412 if (port
->board
->chip_flag
) {
2413 if (iir
== 0x02 && (status
&
2415 mxser_transmit_chars(tty
, port
);
2417 if (status
& UART_LSR_THRE
)
2418 mxser_transmit_chars(tty
, 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
;
2766 unsigned int b
, i
, m
;
2769 mxvar_sdriver
= alloc_tty_driver(MXSER_PORTS
+ 1);
2773 printk(KERN_INFO
"MOXA Smartio/Industio family driver version %s\n",
2776 /* Initialize the tty_driver structure */
2777 mxvar_sdriver
->owner
= THIS_MODULE
;
2778 mxvar_sdriver
->magic
= TTY_DRIVER_MAGIC
;
2779 mxvar_sdriver
->name
= "ttyMI";
2780 mxvar_sdriver
->major
= ttymajor
;
2781 mxvar_sdriver
->minor_start
= 0;
2782 mxvar_sdriver
->num
= MXSER_PORTS
+ 1;
2783 mxvar_sdriver
->type
= TTY_DRIVER_TYPE_SERIAL
;
2784 mxvar_sdriver
->subtype
= SERIAL_TYPE_NORMAL
;
2785 mxvar_sdriver
->init_termios
= tty_std_termios
;
2786 mxvar_sdriver
->init_termios
.c_cflag
= B9600
|CS8
|CREAD
|HUPCL
|CLOCAL
;
2787 mxvar_sdriver
->flags
= TTY_DRIVER_REAL_RAW
|TTY_DRIVER_DYNAMIC_DEV
;
2788 tty_set_operations(mxvar_sdriver
, &mxser_ops
);
2790 retval
= tty_register_driver(mxvar_sdriver
);
2792 printk(KERN_ERR
"Couldn't install MOXA Smartio/Industio family "
2797 /* Start finding ISA boards here */
2798 for (m
= 0, b
= 0; b
< MXSER_BOARDS
; b
++) {
2802 brd
= &mxser_boards
[m
];
2803 retval
= mxser_get_ISA_conf(!ioaddr
[b
], brd
);
2809 printk(KERN_INFO
"mxser: found MOXA %s board (CAP=0x%lx)\n",
2810 brd
->info
->name
, ioaddr
[b
]);
2812 /* mxser_initbrd will hook ISR. */
2813 if (mxser_initbrd(brd
, NULL
) < 0) {
2818 brd
->idx
= m
* MXSER_PORTS_PER_BOARD
;
2819 for (i
= 0; i
< brd
->info
->nports
; i
++)
2820 tty_register_device(mxvar_sdriver
, brd
->idx
+ i
, NULL
);
2825 retval
= pci_register_driver(&mxser_driver
);
2827 printk(KERN_ERR
"mxser: can't register pci driver\n");
2831 } /* else: we have some ISA cards under control */
2836 tty_unregister_driver(mxvar_sdriver
);
2838 put_tty_driver(mxvar_sdriver
);
2842 static void __exit
mxser_module_exit(void)
2846 pci_unregister_driver(&mxser_driver
);
2848 for (i
= 0; i
< MXSER_BOARDS
; i
++) /* ISA remains */
2849 if (mxser_boards
[i
].info
!= NULL
)
2850 for (j
= 0; j
< mxser_boards
[i
].info
->nports
; j
++)
2851 tty_unregister_device(mxvar_sdriver
,
2852 mxser_boards
[i
].idx
+ j
);
2853 tty_unregister_driver(mxvar_sdriver
);
2854 put_tty_driver(mxvar_sdriver
);
2856 for (i
= 0; i
< MXSER_BOARDS
; i
++)
2857 if (mxser_boards
[i
].info
!= NULL
)
2858 mxser_release_res(&mxser_boards
[i
], NULL
, 1);
2861 module_init(mxser_module_init
);
2862 module_exit(mxser_module_exit
);