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/smp_lock.h>
27 #include <linux/timer.h>
28 #include <linux/interrupt.h>
29 #include <linux/tty.h>
30 #include <linux/tty_flip.h>
31 #include <linux/serial.h>
32 #include <linux/serial_reg.h>
33 #include <linux/major.h>
34 #include <linux/string.h>
35 #include <linux/fcntl.h>
36 #include <linux/ptrace.h>
37 #include <linux/gfp.h>
38 #include <linux/ioport.h>
40 #include <linux/delay.h>
41 #include <linux/pci.h>
42 #include <linux/bitops.h>
44 #include <asm/system.h>
47 #include <asm/uaccess.h>
51 #define MXSER_VERSION "2.0.4" /* 1.12 */
52 #define MXSERMAJOR 174
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 /*CheckIsMoxaMust return value*/
60 #define MOXA_OTHER_UART 0x00
61 #define MOXA_MUST_MU150_HWID 0x01
62 #define MOXA_MUST_MU860_HWID 0x02
64 #define WAKEUP_CHARS 256
66 #define UART_MCR_AFE 0x20
67 #define UART_LSR_SPECIAL 0x1E
69 #define PCI_DEVICE_ID_POS104UL 0x1044
70 #define PCI_DEVICE_ID_CB108 0x1080
71 #define PCI_DEVICE_ID_CP102UF 0x1023
72 #define PCI_DEVICE_ID_CB114 0x1142
73 #define PCI_DEVICE_ID_CP114UL 0x1143
74 #define PCI_DEVICE_ID_CB134I 0x1341
75 #define PCI_DEVICE_ID_CP138U 0x1380
78 #define C168_ASIC_ID 1
79 #define C104_ASIC_ID 2
80 #define C102_ASIC_ID 0xB
81 #define CI132_ASIC_ID 4
82 #define CI134_ASIC_ID 3
83 #define CI104J_ASIC_ID 5
85 #define MXSER_HIGHBAUD 1
88 /* This is only for PCI */
98 } Gpci_uart_info
[] = {
99 {MOXA_OTHER_UART
, 16, 16, 16, 14, 14, 1, 921600L},
100 {MOXA_MUST_MU150_HWID
, 64, 64, 64, 48, 48, 16, 230400L},
101 {MOXA_MUST_MU860_HWID
, 128, 128, 128, 96, 96, 32, 921600L}
103 #define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info)
105 struct mxser_cardinfo
{
111 static const struct mxser_cardinfo mxser_cards
[] = {
112 /* 0*/ { "C168 series", 8, },
113 { "C104 series", 4, },
114 { "CI-104J series", 4, },
115 { "C168H/PCI series", 8, },
116 { "C104H/PCI series", 4, },
117 /* 5*/ { "C102 series", 4, MXSER_HAS2
}, /* C102-ISA */
118 { "CI-132 series", 4, MXSER_HAS2
},
119 { "CI-134 series", 4, },
120 { "CP-132 series", 2, },
121 { "CP-114 series", 4, },
122 /*10*/ { "CT-114 series", 4, },
123 { "CP-102 series", 2, MXSER_HIGHBAUD
},
124 { "CP-104U series", 4, },
125 { "CP-168U series", 8, },
126 { "CP-132U series", 2, },
127 /*15*/ { "CP-134U series", 4, },
128 { "CP-104JU series", 4, },
129 { "Moxa UC7000 Serial", 8, }, /* RC7000 */
130 { "CP-118U series", 8, },
131 { "CP-102UL series", 2, },
132 /*20*/ { "CP-102U series", 2, },
133 { "CP-118EL series", 8, },
134 { "CP-168EL series", 8, },
135 { "CP-104EL series", 4, },
136 { "CB-108 series", 8, },
137 /*25*/ { "CB-114 series", 4, },
138 { "CB-134I series", 4, },
139 { "CP-138U series", 8, },
140 { "POS-104UL series", 4, },
141 { "CP-114UL series", 4, },
142 /*30*/ { "CP-102UF series", 2, }
145 /* driver_data correspond to the lines in the structure above
146 see also ISA probe function before you change something */
147 static struct pci_device_id mxser_pcibrds
[] = {
148 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_C168
), .driver_data
= 3 },
149 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_C104
), .driver_data
= 4 },
150 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP132
), .driver_data
= 8 },
151 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP114
), .driver_data
= 9 },
152 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CT114
), .driver_data
= 10 },
153 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP102
), .driver_data
= 11 },
154 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP104U
), .driver_data
= 12 },
155 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP168U
), .driver_data
= 13 },
156 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP132U
), .driver_data
= 14 },
157 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP134U
), .driver_data
= 15 },
158 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP104JU
),.driver_data
= 16 },
159 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_RC7000
), .driver_data
= 17 },
160 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP118U
), .driver_data
= 18 },
161 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP102UL
),.driver_data
= 19 },
162 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP102U
), .driver_data
= 20 },
163 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP118EL
),.driver_data
= 21 },
164 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP168EL
),.driver_data
= 22 },
165 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP104EL
),.driver_data
= 23 },
166 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_CB108
), .driver_data
= 24 },
167 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_CB114
), .driver_data
= 25 },
168 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_CB134I
), .driver_data
= 26 },
169 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_CP138U
), .driver_data
= 27 },
170 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_POS104UL
), .driver_data
= 28 },
171 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_CP114UL
), .driver_data
= 29 },
172 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_CP102UF
), .driver_data
= 30 },
175 MODULE_DEVICE_TABLE(pci
, mxser_pcibrds
);
177 static unsigned long ioaddr
[MXSER_BOARDS
];
178 static int ttymajor
= MXSERMAJOR
;
180 /* Variables for insmod */
182 MODULE_AUTHOR("Casper Yang");
183 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
184 module_param_array(ioaddr
, ulong
, NULL
, 0);
185 MODULE_PARM_DESC(ioaddr
, "ISA io addresses to look for a moxa board");
186 module_param(ttymajor
, int, 0);
187 MODULE_LICENSE("GPL");
191 unsigned long rxcnt
[MXSER_PORTS
];
192 unsigned long txcnt
[MXSER_PORTS
];
198 unsigned long up_rxcnt
;
199 unsigned long up_txcnt
;
201 unsigned char hold_reason
;
204 struct mxser_mon_ext
{
205 unsigned long rx_cnt
[32];
206 unsigned long tx_cnt
[32];
207 unsigned long up_rxcnt
[32];
208 unsigned long up_txcnt
[32];
209 int modem_status
[32];
223 struct tty_port port
;
224 struct mxser_board
*board
;
226 unsigned long ioaddr
;
227 unsigned long opmode_ioaddr
;
231 int rx_trigger
; /* Rx fifo trigger level */
233 int baud_base
; /* max. speed */
234 int type
; /* UART type */
236 int x_char
; /* xon/xoff character */
237 int IER
; /* Interrupt Enable Register */
238 int MCR
; /* Modem control register */
240 unsigned char stop_rx
;
241 unsigned char ldisc_stop_rx
;
244 unsigned char err_shadow
;
246 struct async_icount icount
; /* kernel counters for 4 input interrupts */
249 int read_status_mask
;
250 int ignore_status_mask
;
256 struct ktermios normal_termios
;
258 struct mxser_mon mon_data
;
261 wait_queue_head_t delta_msr_wait
;
267 const struct mxser_cardinfo
*info
;
268 unsigned long vector
;
269 unsigned long vector_mask
;
274 struct mxser_port ports
[MXSER_PORTS_PER_BOARD
];
277 struct mxser_mstatus
{
285 static struct mxser_board mxser_boards
[MXSER_BOARDS
];
286 static struct tty_driver
*mxvar_sdriver
;
287 static struct mxser_log mxvar_log
;
288 static int mxser_set_baud_method
[MXSER_PORTS
+ 1];
290 static void mxser_enable_must_enchance_mode(unsigned long baseio
)
295 oldlcr
= inb(baseio
+ UART_LCR
);
296 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
298 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
299 efr
|= MOXA_MUST_EFR_EFRB_ENABLE
;
301 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
302 outb(oldlcr
, baseio
+ UART_LCR
);
305 static void mxser_disable_must_enchance_mode(unsigned long baseio
)
310 oldlcr
= inb(baseio
+ UART_LCR
);
311 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
313 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
314 efr
&= ~MOXA_MUST_EFR_EFRB_ENABLE
;
316 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
317 outb(oldlcr
, baseio
+ UART_LCR
);
320 static void mxser_set_must_xon1_value(unsigned long baseio
, u8 value
)
325 oldlcr
= inb(baseio
+ UART_LCR
);
326 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
328 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
329 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
330 efr
|= MOXA_MUST_EFR_BANK0
;
332 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
333 outb(value
, baseio
+ MOXA_MUST_XON1_REGISTER
);
334 outb(oldlcr
, baseio
+ UART_LCR
);
337 static void mxser_set_must_xoff1_value(unsigned long baseio
, u8 value
)
342 oldlcr
= inb(baseio
+ UART_LCR
);
343 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
345 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
346 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
347 efr
|= MOXA_MUST_EFR_BANK0
;
349 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
350 outb(value
, baseio
+ MOXA_MUST_XOFF1_REGISTER
);
351 outb(oldlcr
, baseio
+ UART_LCR
);
354 static void mxser_set_must_fifo_value(struct mxser_port
*info
)
359 oldlcr
= inb(info
->ioaddr
+ UART_LCR
);
360 outb(MOXA_MUST_ENTER_ENCHANCE
, info
->ioaddr
+ UART_LCR
);
362 efr
= inb(info
->ioaddr
+ MOXA_MUST_EFR_REGISTER
);
363 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
364 efr
|= MOXA_MUST_EFR_BANK1
;
366 outb(efr
, info
->ioaddr
+ MOXA_MUST_EFR_REGISTER
);
367 outb((u8
)info
->rx_high_water
, info
->ioaddr
+ MOXA_MUST_RBRTH_REGISTER
);
368 outb((u8
)info
->rx_trigger
, info
->ioaddr
+ MOXA_MUST_RBRTI_REGISTER
);
369 outb((u8
)info
->rx_low_water
, info
->ioaddr
+ MOXA_MUST_RBRTL_REGISTER
);
370 outb(oldlcr
, info
->ioaddr
+ UART_LCR
);
373 static void mxser_set_must_enum_value(unsigned long baseio
, u8 value
)
378 oldlcr
= inb(baseio
+ UART_LCR
);
379 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
381 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
382 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
383 efr
|= MOXA_MUST_EFR_BANK2
;
385 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
386 outb(value
, baseio
+ MOXA_MUST_ENUM_REGISTER
);
387 outb(oldlcr
, baseio
+ UART_LCR
);
390 static void mxser_get_must_hardware_id(unsigned long baseio
, u8
*pId
)
395 oldlcr
= inb(baseio
+ UART_LCR
);
396 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
398 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
399 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
400 efr
|= MOXA_MUST_EFR_BANK2
;
402 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
403 *pId
= inb(baseio
+ MOXA_MUST_HWID_REGISTER
);
404 outb(oldlcr
, baseio
+ UART_LCR
);
407 static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio
)
412 oldlcr
= inb(baseio
+ UART_LCR
);
413 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
415 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
416 efr
&= ~MOXA_MUST_EFR_SF_MASK
;
418 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
419 outb(oldlcr
, baseio
+ UART_LCR
);
422 static void mxser_enable_must_tx_software_flow_control(unsigned long baseio
)
427 oldlcr
= inb(baseio
+ UART_LCR
);
428 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
430 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
431 efr
&= ~MOXA_MUST_EFR_SF_TX_MASK
;
432 efr
|= MOXA_MUST_EFR_SF_TX1
;
434 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
435 outb(oldlcr
, baseio
+ UART_LCR
);
438 static void mxser_disable_must_tx_software_flow_control(unsigned long baseio
)
443 oldlcr
= inb(baseio
+ UART_LCR
);
444 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
446 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
447 efr
&= ~MOXA_MUST_EFR_SF_TX_MASK
;
449 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
450 outb(oldlcr
, baseio
+ UART_LCR
);
453 static void mxser_enable_must_rx_software_flow_control(unsigned long baseio
)
458 oldlcr
= inb(baseio
+ UART_LCR
);
459 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
461 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
462 efr
&= ~MOXA_MUST_EFR_SF_RX_MASK
;
463 efr
|= MOXA_MUST_EFR_SF_RX1
;
465 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
466 outb(oldlcr
, baseio
+ UART_LCR
);
469 static void mxser_disable_must_rx_software_flow_control(unsigned long baseio
)
474 oldlcr
= inb(baseio
+ UART_LCR
);
475 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
477 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
478 efr
&= ~MOXA_MUST_EFR_SF_RX_MASK
;
480 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
481 outb(oldlcr
, baseio
+ UART_LCR
);
485 static int __devinit
CheckIsMoxaMust(unsigned long io
)
490 outb(0, io
+ UART_LCR
);
491 mxser_disable_must_enchance_mode(io
);
492 oldmcr
= inb(io
+ UART_MCR
);
493 outb(0, io
+ UART_MCR
);
494 mxser_set_must_xon1_value(io
, 0x11);
495 if ((hwid
= inb(io
+ UART_MCR
)) != 0) {
496 outb(oldmcr
, io
+ UART_MCR
);
497 return MOXA_OTHER_UART
;
500 mxser_get_must_hardware_id(io
, &hwid
);
501 for (i
= 1; i
< UART_INFO_NUM
; i
++) { /* 0 = OTHER_UART */
502 if (hwid
== Gpci_uart_info
[i
].type
)
505 return MOXA_OTHER_UART
;
509 static void process_txrx_fifo(struct mxser_port
*info
)
513 if ((info
->type
== PORT_16450
) || (info
->type
== PORT_8250
)) {
514 info
->rx_trigger
= 1;
515 info
->rx_high_water
= 1;
516 info
->rx_low_water
= 1;
517 info
->xmit_fifo_size
= 1;
519 for (i
= 0; i
< UART_INFO_NUM
; i
++)
520 if (info
->board
->chip_flag
== Gpci_uart_info
[i
].type
) {
521 info
->rx_trigger
= Gpci_uart_info
[i
].rx_trigger
;
522 info
->rx_low_water
= Gpci_uart_info
[i
].rx_low_water
;
523 info
->rx_high_water
= Gpci_uart_info
[i
].rx_high_water
;
524 info
->xmit_fifo_size
= Gpci_uart_info
[i
].xmit_fifo_size
;
529 static unsigned char mxser_get_msr(int baseaddr
, int mode
, int port
)
531 static unsigned char mxser_msr
[MXSER_PORTS
+ 1];
532 unsigned char status
= 0;
534 status
= inb(baseaddr
+ UART_MSR
);
536 mxser_msr
[port
] &= 0x0F;
537 mxser_msr
[port
] |= status
;
538 status
= mxser_msr
[port
];
545 static int mxser_carrier_raised(struct tty_port
*port
)
547 struct mxser_port
*mp
= container_of(port
, struct mxser_port
, port
);
548 return (inb(mp
->ioaddr
+ UART_MSR
) & UART_MSR_DCD
)?1:0;
551 static void mxser_dtr_rts(struct tty_port
*port
, int on
)
553 struct mxser_port
*mp
= container_of(port
, struct mxser_port
, port
);
556 spin_lock_irqsave(&mp
->slock
, flags
);
558 outb(inb(mp
->ioaddr
+ UART_MCR
) |
559 UART_MCR_DTR
| UART_MCR_RTS
, mp
->ioaddr
+ UART_MCR
);
561 outb(inb(mp
->ioaddr
+ UART_MCR
)&~(UART_MCR_DTR
| UART_MCR_RTS
),
562 mp
->ioaddr
+ UART_MCR
);
563 spin_unlock_irqrestore(&mp
->slock
, flags
);
566 static int mxser_set_baud(struct tty_struct
*tty
, long newspd
)
568 struct mxser_port
*info
= tty
->driver_data
;
575 if (newspd
> info
->max_baud
)
579 quot
= 2 * info
->baud_base
/ 269;
580 tty_encode_baud_rate(tty
, 134, 134);
582 quot
= info
->baud_base
/ newspd
;
585 baud
= info
->baud_base
/quot
;
586 tty_encode_baud_rate(tty
, baud
, baud
);
591 info
->timeout
= ((info
->xmit_fifo_size
* HZ
* 10 * quot
) / info
->baud_base
);
592 info
->timeout
+= HZ
/ 50; /* Add .02 seconds of slop */
595 info
->MCR
|= UART_MCR_DTR
;
596 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
598 info
->MCR
&= ~UART_MCR_DTR
;
599 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
603 cval
= inb(info
->ioaddr
+ UART_LCR
);
605 outb(cval
| UART_LCR_DLAB
, info
->ioaddr
+ UART_LCR
); /* set DLAB */
607 outb(quot
& 0xff, info
->ioaddr
+ UART_DLL
); /* LS of divisor */
608 outb(quot
>> 8, info
->ioaddr
+ UART_DLM
); /* MS of divisor */
609 outb(cval
, info
->ioaddr
+ UART_LCR
); /* reset DLAB */
612 if (C_BAUD(tty
) == BOTHER
) {
613 quot
= info
->baud_base
% newspd
;
615 if (quot
% newspd
> newspd
/ 2) {
621 mxser_set_must_enum_value(info
->ioaddr
, quot
);
624 mxser_set_must_enum_value(info
->ioaddr
, 0);
630 * This routine is called to set the UART divisor registers to match
631 * the specified baud rate for a serial port.
633 static int mxser_change_speed(struct tty_struct
*tty
,
634 struct ktermios
*old_termios
)
636 struct mxser_port
*info
= tty
->driver_data
;
637 unsigned cflag
, cval
, fcr
;
639 unsigned char status
;
641 cflag
= tty
->termios
->c_cflag
;
645 if (mxser_set_baud_method
[tty
->index
] == 0)
646 mxser_set_baud(tty
, tty_get_baud_rate(tty
));
648 /* byte size and parity */
649 switch (cflag
& CSIZE
) {
664 break; /* too keep GCC shut... */
669 cval
|= UART_LCR_PARITY
;
670 if (!(cflag
& PARODD
))
671 cval
|= UART_LCR_EPAR
;
673 cval
|= UART_LCR_SPAR
;
675 if ((info
->type
== PORT_8250
) || (info
->type
== PORT_16450
)) {
676 if (info
->board
->chip_flag
) {
677 fcr
= UART_FCR_ENABLE_FIFO
;
678 fcr
|= MOXA_MUST_FCR_GDA_MODE_ENABLE
;
679 mxser_set_must_fifo_value(info
);
683 fcr
= UART_FCR_ENABLE_FIFO
;
684 if (info
->board
->chip_flag
) {
685 fcr
|= MOXA_MUST_FCR_GDA_MODE_ENABLE
;
686 mxser_set_must_fifo_value(info
);
688 switch (info
->rx_trigger
) {
690 fcr
|= UART_FCR_TRIGGER_1
;
693 fcr
|= UART_FCR_TRIGGER_4
;
696 fcr
|= UART_FCR_TRIGGER_8
;
699 fcr
|= UART_FCR_TRIGGER_14
;
705 /* CTS flow control flag and modem status interrupts */
706 info
->IER
&= ~UART_IER_MSI
;
707 info
->MCR
&= ~UART_MCR_AFE
;
708 if (cflag
& CRTSCTS
) {
709 info
->port
.flags
|= ASYNC_CTS_FLOW
;
710 info
->IER
|= UART_IER_MSI
;
711 if ((info
->type
== PORT_16550A
) || (info
->board
->chip_flag
)) {
712 info
->MCR
|= UART_MCR_AFE
;
714 status
= inb(info
->ioaddr
+ UART_MSR
);
715 if (tty
->hw_stopped
) {
716 if (status
& UART_MSR_CTS
) {
718 if (info
->type
!= PORT_16550A
&&
719 !info
->board
->chip_flag
) {
720 outb(info
->IER
& ~UART_IER_THRI
,
723 info
->IER
|= UART_IER_THRI
;
724 outb(info
->IER
, info
->ioaddr
+
730 if (!(status
& UART_MSR_CTS
)) {
732 if ((info
->type
!= PORT_16550A
) &&
733 (!info
->board
->chip_flag
)) {
734 info
->IER
&= ~UART_IER_THRI
;
735 outb(info
->IER
, info
->ioaddr
+
742 info
->port
.flags
&= ~ASYNC_CTS_FLOW
;
744 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
745 if (cflag
& CLOCAL
) {
746 info
->port
.flags
&= ~ASYNC_CHECK_CD
;
748 info
->port
.flags
|= ASYNC_CHECK_CD
;
749 info
->IER
|= UART_IER_MSI
;
751 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
754 * Set up parity check flag
756 info
->read_status_mask
= UART_LSR_OE
| UART_LSR_THRE
| UART_LSR_DR
;
758 info
->read_status_mask
|= UART_LSR_FE
| UART_LSR_PE
;
759 if (I_BRKINT(tty
) || I_PARMRK(tty
))
760 info
->read_status_mask
|= UART_LSR_BI
;
762 info
->ignore_status_mask
= 0;
765 info
->ignore_status_mask
|= UART_LSR_BI
;
766 info
->read_status_mask
|= UART_LSR_BI
;
768 * If we're ignore parity and break indicators, ignore
769 * overruns too. (For real raw support).
772 info
->ignore_status_mask
|=
776 info
->read_status_mask
|=
782 if (info
->board
->chip_flag
) {
783 mxser_set_must_xon1_value(info
->ioaddr
, START_CHAR(tty
));
784 mxser_set_must_xoff1_value(info
->ioaddr
, STOP_CHAR(tty
));
786 mxser_enable_must_rx_software_flow_control(
789 mxser_disable_must_rx_software_flow_control(
793 mxser_enable_must_tx_software_flow_control(
796 mxser_disable_must_tx_software_flow_control(
802 outb(fcr
, info
->ioaddr
+ UART_FCR
); /* set fcr */
803 outb(cval
, info
->ioaddr
+ UART_LCR
);
808 static void mxser_check_modem_status(struct tty_struct
*tty
,
809 struct mxser_port
*port
, int status
)
811 /* update input line counters */
812 if (status
& UART_MSR_TERI
)
814 if (status
& UART_MSR_DDSR
)
816 if (status
& UART_MSR_DDCD
)
818 if (status
& UART_MSR_DCTS
)
820 port
->mon_data
.modem_status
= status
;
821 wake_up_interruptible(&port
->delta_msr_wait
);
823 if ((port
->port
.flags
& ASYNC_CHECK_CD
) && (status
& UART_MSR_DDCD
)) {
824 if (status
& UART_MSR_DCD
)
825 wake_up_interruptible(&port
->port
.open_wait
);
828 if (port
->port
.flags
& ASYNC_CTS_FLOW
) {
829 if (tty
->hw_stopped
) {
830 if (status
& UART_MSR_CTS
) {
833 if ((port
->type
!= PORT_16550A
) &&
834 (!port
->board
->chip_flag
)) {
835 outb(port
->IER
& ~UART_IER_THRI
,
836 port
->ioaddr
+ UART_IER
);
837 port
->IER
|= UART_IER_THRI
;
838 outb(port
->IER
, port
->ioaddr
+
844 if (!(status
& UART_MSR_CTS
)) {
846 if (port
->type
!= PORT_16550A
&&
847 !port
->board
->chip_flag
) {
848 port
->IER
&= ~UART_IER_THRI
;
849 outb(port
->IER
, port
->ioaddr
+
857 static int mxser_startup(struct tty_struct
*tty
)
859 struct mxser_port
*info
= tty
->driver_data
;
863 page
= __get_free_page(GFP_KERNEL
);
867 spin_lock_irqsave(&info
->slock
, flags
);
869 if (info
->port
.flags
& ASYNC_INITIALIZED
) {
871 spin_unlock_irqrestore(&info
->slock
, flags
);
875 if (!info
->ioaddr
|| !info
->type
) {
876 set_bit(TTY_IO_ERROR
, &tty
->flags
);
878 spin_unlock_irqrestore(&info
->slock
, flags
);
881 if (info
->port
.xmit_buf
)
884 info
->port
.xmit_buf
= (unsigned char *) page
;
887 * Clear the FIFO buffers and disable them
888 * (they will be reenabled in mxser_change_speed())
890 if (info
->board
->chip_flag
)
891 outb((UART_FCR_CLEAR_RCVR
|
892 UART_FCR_CLEAR_XMIT
|
893 MOXA_MUST_FCR_GDA_MODE_ENABLE
), info
->ioaddr
+ UART_FCR
);
895 outb((UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
),
896 info
->ioaddr
+ UART_FCR
);
899 * At this point there's no way the LSR could still be 0xFF;
900 * if it is, then bail out, because there's likely no UART
903 if (inb(info
->ioaddr
+ UART_LSR
) == 0xff) {
904 spin_unlock_irqrestore(&info
->slock
, flags
);
905 if (capable(CAP_SYS_ADMIN
)) {
907 set_bit(TTY_IO_ERROR
, &tty
->flags
);
914 * Clear the interrupt registers.
916 (void) inb(info
->ioaddr
+ UART_LSR
);
917 (void) inb(info
->ioaddr
+ UART_RX
);
918 (void) inb(info
->ioaddr
+ UART_IIR
);
919 (void) inb(info
->ioaddr
+ UART_MSR
);
922 * Now, initialize the UART
924 outb(UART_LCR_WLEN8
, info
->ioaddr
+ UART_LCR
); /* reset DLAB */
925 info
->MCR
= UART_MCR_DTR
| UART_MCR_RTS
;
926 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
929 * Finally, enable interrupts
931 info
->IER
= UART_IER_MSI
| UART_IER_RLSI
| UART_IER_RDI
;
933 if (info
->board
->chip_flag
)
934 info
->IER
|= MOXA_MUST_IER_EGDAI
;
935 outb(info
->IER
, info
->ioaddr
+ UART_IER
); /* enable interrupts */
938 * And clear the interrupt registers again for luck.
940 (void) inb(info
->ioaddr
+ UART_LSR
);
941 (void) inb(info
->ioaddr
+ UART_RX
);
942 (void) inb(info
->ioaddr
+ UART_IIR
);
943 (void) inb(info
->ioaddr
+ UART_MSR
);
945 clear_bit(TTY_IO_ERROR
, &tty
->flags
);
946 info
->xmit_cnt
= info
->xmit_head
= info
->xmit_tail
= 0;
949 * and set the speed of the serial port
951 mxser_change_speed(tty
, NULL
);
952 info
->port
.flags
|= ASYNC_INITIALIZED
;
953 spin_unlock_irqrestore(&info
->slock
, flags
);
959 * This routine will shutdown a serial port; interrupts maybe disabled, and
960 * DTR is dropped if the hangup on close termio flag is on.
962 static void mxser_shutdown(struct tty_struct
*tty
)
964 struct mxser_port
*info
= tty
->driver_data
;
967 if (!(info
->port
.flags
& ASYNC_INITIALIZED
))
970 spin_lock_irqsave(&info
->slock
, flags
);
973 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
974 * here so the queue might never be waken up
976 wake_up_interruptible(&info
->delta_msr_wait
);
979 * Free the IRQ, if necessary
981 if (info
->port
.xmit_buf
) {
982 free_page((unsigned long) info
->port
.xmit_buf
);
983 info
->port
.xmit_buf
= NULL
;
987 outb(0x00, info
->ioaddr
+ UART_IER
);
989 if (tty
->termios
->c_cflag
& HUPCL
)
990 info
->MCR
&= ~(UART_MCR_DTR
| UART_MCR_RTS
);
991 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
993 /* clear Rx/Tx FIFO's */
994 if (info
->board
->chip_flag
)
995 outb(UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
|
996 MOXA_MUST_FCR_GDA_MODE_ENABLE
,
997 info
->ioaddr
+ UART_FCR
);
999 outb(UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
,
1000 info
->ioaddr
+ UART_FCR
);
1002 /* read data port to reset things */
1003 (void) inb(info
->ioaddr
+ UART_RX
);
1005 set_bit(TTY_IO_ERROR
, &tty
->flags
);
1007 info
->port
.flags
&= ~ASYNC_INITIALIZED
;
1009 if (info
->board
->chip_flag
)
1010 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info
->ioaddr
);
1012 spin_unlock_irqrestore(&info
->slock
, flags
);
1016 * This routine is called whenever a serial port is opened. It
1017 * enables interrupts for a serial port, linking in its async structure into
1018 * the IRQ chain. It also performs the serial-specific
1019 * initialization for the tty structure.
1021 static int mxser_open(struct tty_struct
*tty
, struct file
*filp
)
1023 struct mxser_port
*info
;
1024 unsigned long flags
;
1028 if (line
== MXSER_PORTS
)
1030 if (line
< 0 || line
> MXSER_PORTS
)
1032 info
= &mxser_boards
[line
/ MXSER_PORTS_PER_BOARD
].ports
[line
% MXSER_PORTS_PER_BOARD
];
1036 tty
->driver_data
= info
;
1037 tty_port_tty_set(&info
->port
, tty
);
1039 * Start up serial port
1041 spin_lock_irqsave(&info
->port
.lock
, flags
);
1043 spin_unlock_irqrestore(&info
->port
.lock
, flags
);
1044 retval
= mxser_startup(tty
);
1048 retval
= tty_port_block_til_ready(&info
->port
, tty
, filp
);
1055 static void mxser_flush_buffer(struct tty_struct
*tty
)
1057 struct mxser_port
*info
= tty
->driver_data
;
1059 unsigned long flags
;
1062 spin_lock_irqsave(&info
->slock
, flags
);
1063 info
->xmit_cnt
= info
->xmit_head
= info
->xmit_tail
= 0;
1065 fcr
= inb(info
->ioaddr
+ UART_FCR
);
1066 outb((fcr
| UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
),
1067 info
->ioaddr
+ UART_FCR
);
1068 outb(fcr
, info
->ioaddr
+ UART_FCR
);
1070 spin_unlock_irqrestore(&info
->slock
, flags
);
1076 static void mxser_close_port(struct tty_struct
*tty
, struct tty_port
*port
)
1078 struct mxser_port
*info
= container_of(port
, struct mxser_port
, port
);
1079 unsigned long timeout
;
1081 * Save the termios structure, since this port may have
1082 * separate termios for callout and dialin.
1084 * FIXME: Can this go ?
1086 if (port
->flags
& ASYNC_NORMAL_ACTIVE
)
1087 info
->normal_termios
= *tty
->termios
;
1089 * At this point we stop accepting input. To do this, we
1090 * disable the receive line status interrupts, and tell the
1091 * interrupt driver to stop checking the data ready bit in the
1092 * line status register.
1094 info
->IER
&= ~UART_IER_RLSI
;
1095 if (info
->board
->chip_flag
)
1096 info
->IER
&= ~MOXA_MUST_RECV_ISR
;
1098 if (port
->flags
& ASYNC_INITIALIZED
) {
1099 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1101 * Before we drop DTR, make sure the UART transmitter
1102 * has completely drained; this is especially
1103 * important if there is a transmit FIFO!
1105 timeout
= jiffies
+ HZ
;
1106 while (!(inb(info
->ioaddr
+ UART_LSR
) & UART_LSR_TEMT
)) {
1107 schedule_timeout_interruptible(5);
1108 if (time_after(jiffies
, timeout
))
1112 mxser_shutdown(tty
);
1117 * This routine is called when the serial port gets closed. First, we
1118 * wait for the last remaining data to be sent. Then, we unlink its
1119 * async structure from the interrupt chain if necessary, and we free
1120 * that IRQ if nothing is left in the chain.
1122 static void mxser_close(struct tty_struct
*tty
, struct file
*filp
)
1124 struct mxser_port
*info
= tty
->driver_data
;
1125 struct tty_port
*port
= &info
->port
;
1127 if (tty
->index
== MXSER_PORTS
)
1129 if (tty_port_close_start(port
, tty
, filp
) == 0)
1131 mxser_close_port(tty
, port
);
1132 mxser_flush_buffer(tty
);
1133 /* Right now the tty_port set is done outside of the close_end helper
1134 as we don't yet have everyone using refcounts */
1135 tty_port_close_end(port
, tty
);
1136 tty_port_tty_set(port
, NULL
);
1139 static int mxser_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
1142 struct mxser_port
*info
= tty
->driver_data
;
1143 unsigned long flags
;
1145 if (!info
->port
.xmit_buf
)
1149 c
= min_t(int, count
, min(SERIAL_XMIT_SIZE
- info
->xmit_cnt
- 1,
1150 SERIAL_XMIT_SIZE
- info
->xmit_head
));
1154 memcpy(info
->port
.xmit_buf
+ info
->xmit_head
, buf
, c
);
1155 spin_lock_irqsave(&info
->slock
, flags
);
1156 info
->xmit_head
= (info
->xmit_head
+ c
) &
1157 (SERIAL_XMIT_SIZE
- 1);
1158 info
->xmit_cnt
+= c
;
1159 spin_unlock_irqrestore(&info
->slock
, flags
);
1166 if (info
->xmit_cnt
&& !tty
->stopped
) {
1167 if (!tty
->hw_stopped
||
1168 (info
->type
== PORT_16550A
) ||
1169 (info
->board
->chip_flag
)) {
1170 spin_lock_irqsave(&info
->slock
, flags
);
1171 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+
1173 info
->IER
|= UART_IER_THRI
;
1174 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1175 spin_unlock_irqrestore(&info
->slock
, flags
);
1181 static int mxser_put_char(struct tty_struct
*tty
, unsigned char ch
)
1183 struct mxser_port
*info
= tty
->driver_data
;
1184 unsigned long flags
;
1186 if (!info
->port
.xmit_buf
)
1189 if (info
->xmit_cnt
>= SERIAL_XMIT_SIZE
- 1)
1192 spin_lock_irqsave(&info
->slock
, flags
);
1193 info
->port
.xmit_buf
[info
->xmit_head
++] = ch
;
1194 info
->xmit_head
&= SERIAL_XMIT_SIZE
- 1;
1196 spin_unlock_irqrestore(&info
->slock
, flags
);
1197 if (!tty
->stopped
) {
1198 if (!tty
->hw_stopped
||
1199 (info
->type
== PORT_16550A
) ||
1200 info
->board
->chip_flag
) {
1201 spin_lock_irqsave(&info
->slock
, flags
);
1202 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
1203 info
->IER
|= UART_IER_THRI
;
1204 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1205 spin_unlock_irqrestore(&info
->slock
, flags
);
1212 static void mxser_flush_chars(struct tty_struct
*tty
)
1214 struct mxser_port
*info
= tty
->driver_data
;
1215 unsigned long flags
;
1217 if (info
->xmit_cnt
<= 0 || tty
->stopped
|| !info
->port
.xmit_buf
||
1218 (tty
->hw_stopped
&& info
->type
!= PORT_16550A
&&
1219 !info
->board
->chip_flag
))
1222 spin_lock_irqsave(&info
->slock
, flags
);
1224 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
1225 info
->IER
|= UART_IER_THRI
;
1226 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1228 spin_unlock_irqrestore(&info
->slock
, flags
);
1231 static int mxser_write_room(struct tty_struct
*tty
)
1233 struct mxser_port
*info
= tty
->driver_data
;
1236 ret
= SERIAL_XMIT_SIZE
- info
->xmit_cnt
- 1;
1237 return ret
< 0 ? 0 : ret
;
1240 static int mxser_chars_in_buffer(struct tty_struct
*tty
)
1242 struct mxser_port
*info
= tty
->driver_data
;
1243 return info
->xmit_cnt
;
1247 * ------------------------------------------------------------
1248 * friends of mxser_ioctl()
1249 * ------------------------------------------------------------
1251 static int mxser_get_serial_info(struct tty_struct
*tty
,
1252 struct serial_struct __user
*retinfo
)
1254 struct mxser_port
*info
= tty
->driver_data
;
1255 struct serial_struct tmp
= {
1258 .port
= info
->ioaddr
,
1259 .irq
= info
->board
->irq
,
1260 .flags
= info
->port
.flags
,
1261 .baud_base
= info
->baud_base
,
1262 .close_delay
= info
->port
.close_delay
,
1263 .closing_wait
= info
->port
.closing_wait
,
1264 .custom_divisor
= info
->custom_divisor
,
1267 if (copy_to_user(retinfo
, &tmp
, sizeof(*retinfo
)))
1272 static int mxser_set_serial_info(struct tty_struct
*tty
,
1273 struct serial_struct __user
*new_info
)
1275 struct mxser_port
*info
= tty
->driver_data
;
1276 struct serial_struct new_serial
;
1278 unsigned long sl_flags
;
1282 if (!new_info
|| !info
->ioaddr
)
1284 if (copy_from_user(&new_serial
, new_info
, sizeof(new_serial
)))
1287 if (new_serial
.irq
!= info
->board
->irq
||
1288 new_serial
.port
!= info
->ioaddr
)
1291 flags
= info
->port
.flags
& ASYNC_SPD_MASK
;
1293 if (!capable(CAP_SYS_ADMIN
)) {
1294 if ((new_serial
.baud_base
!= info
->baud_base
) ||
1295 (new_serial
.close_delay
!= info
->port
.close_delay
) ||
1296 ((new_serial
.flags
& ~ASYNC_USR_MASK
) != (info
->port
.flags
& ~ASYNC_USR_MASK
)))
1298 info
->port
.flags
= ((info
->port
.flags
& ~ASYNC_USR_MASK
) |
1299 (new_serial
.flags
& ASYNC_USR_MASK
));
1302 * OK, past this point, all the error checking has been done.
1303 * At this point, we start making changes.....
1305 info
->port
.flags
= ((info
->port
.flags
& ~ASYNC_FLAGS
) |
1306 (new_serial
.flags
& ASYNC_FLAGS
));
1307 info
->port
.close_delay
= new_serial
.close_delay
* HZ
/ 100;
1308 info
->port
.closing_wait
= new_serial
.closing_wait
* HZ
/ 100;
1309 tty
->low_latency
= (info
->port
.flags
& ASYNC_LOW_LATENCY
)
1311 if ((info
->port
.flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_CUST
&&
1312 (new_serial
.baud_base
!= info
->baud_base
||
1313 new_serial
.custom_divisor
!=
1314 info
->custom_divisor
)) {
1315 baud
= new_serial
.baud_base
/ new_serial
.custom_divisor
;
1316 tty_encode_baud_rate(tty
, baud
, baud
);
1320 info
->type
= new_serial
.type
;
1322 process_txrx_fifo(info
);
1324 if (info
->port
.flags
& ASYNC_INITIALIZED
) {
1325 if (flags
!= (info
->port
.flags
& ASYNC_SPD_MASK
)) {
1326 spin_lock_irqsave(&info
->slock
, sl_flags
);
1327 mxser_change_speed(tty
, NULL
);
1328 spin_unlock_irqrestore(&info
->slock
, sl_flags
);
1331 retval
= mxser_startup(tty
);
1337 * mxser_get_lsr_info - get line status register info
1339 * Purpose: Let user call ioctl() to get info when the UART physically
1340 * is emptied. On bus types like RS485, the transmitter must
1341 * release the bus after transmitting. This must be done when
1342 * the transmit shift register is empty, not be done when the
1343 * transmit holding register is empty. This functionality
1344 * allows an RS485 driver to be written in user space.
1346 static int mxser_get_lsr_info(struct mxser_port
*info
,
1347 unsigned int __user
*value
)
1349 unsigned char status
;
1350 unsigned int result
;
1351 unsigned long flags
;
1353 spin_lock_irqsave(&info
->slock
, flags
);
1354 status
= inb(info
->ioaddr
+ UART_LSR
);
1355 spin_unlock_irqrestore(&info
->slock
, flags
);
1356 result
= ((status
& UART_LSR_TEMT
) ? TIOCSER_TEMT
: 0);
1357 return put_user(result
, value
);
1360 static int mxser_tiocmget(struct tty_struct
*tty
, struct file
*file
)
1362 struct mxser_port
*info
= tty
->driver_data
;
1363 unsigned char control
, status
;
1364 unsigned long flags
;
1367 if (tty
->index
== MXSER_PORTS
)
1368 return -ENOIOCTLCMD
;
1369 if (test_bit(TTY_IO_ERROR
, &tty
->flags
))
1372 control
= info
->MCR
;
1374 spin_lock_irqsave(&info
->slock
, flags
);
1375 status
= inb(info
->ioaddr
+ UART_MSR
);
1376 if (status
& UART_MSR_ANY_DELTA
)
1377 mxser_check_modem_status(tty
, info
, status
);
1378 spin_unlock_irqrestore(&info
->slock
, flags
);
1379 return ((control
& UART_MCR_RTS
) ? TIOCM_RTS
: 0) |
1380 ((control
& UART_MCR_DTR
) ? TIOCM_DTR
: 0) |
1381 ((status
& UART_MSR_DCD
) ? TIOCM_CAR
: 0) |
1382 ((status
& UART_MSR_RI
) ? TIOCM_RNG
: 0) |
1383 ((status
& UART_MSR_DSR
) ? TIOCM_DSR
: 0) |
1384 ((status
& UART_MSR_CTS
) ? TIOCM_CTS
: 0);
1387 static int mxser_tiocmset(struct tty_struct
*tty
, struct file
*file
,
1388 unsigned int set
, unsigned int clear
)
1390 struct mxser_port
*info
= tty
->driver_data
;
1391 unsigned long flags
;
1394 if (tty
->index
== MXSER_PORTS
)
1395 return -ENOIOCTLCMD
;
1396 if (test_bit(TTY_IO_ERROR
, &tty
->flags
))
1399 spin_lock_irqsave(&info
->slock
, flags
);
1401 if (set
& TIOCM_RTS
)
1402 info
->MCR
|= UART_MCR_RTS
;
1403 if (set
& TIOCM_DTR
)
1404 info
->MCR
|= UART_MCR_DTR
;
1406 if (clear
& TIOCM_RTS
)
1407 info
->MCR
&= ~UART_MCR_RTS
;
1408 if (clear
& TIOCM_DTR
)
1409 info
->MCR
&= ~UART_MCR_DTR
;
1411 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
1412 spin_unlock_irqrestore(&info
->slock
, flags
);
1416 static int __init
mxser_program_mode(int port
)
1428 id
= inb(port
+ 1) & 0x1F;
1429 if ((id
!= C168_ASIC_ID
) &&
1430 (id
!= C104_ASIC_ID
) &&
1431 (id
!= C102_ASIC_ID
) &&
1432 (id
!= CI132_ASIC_ID
) &&
1433 (id
!= CI134_ASIC_ID
) &&
1434 (id
!= CI104J_ASIC_ID
))
1436 for (i
= 0, j
= 0; i
< 4; i
++) {
1440 } else if ((j
== 1) && (n
== 1)) {
1451 static void __init
mxser_normal_mode(int port
)
1455 outb(0xA5, port
+ 1);
1456 outb(0x80, port
+ 3);
1457 outb(12, port
+ 0); /* 9600 bps */
1459 outb(0x03, port
+ 3); /* 8 data bits */
1460 outb(0x13, port
+ 4); /* loop back mode */
1461 for (i
= 0; i
< 16; i
++) {
1463 if ((n
& 0x61) == 0x60)
1468 outb(0x00, port
+ 4);
1471 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
1472 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
1473 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
1474 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
1475 #define EN_CCMD 0x000 /* Chip's command register */
1476 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
1477 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
1478 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
1479 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
1480 #define EN0_DCFG 0x00E /* Data configuration reg WR */
1481 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
1482 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
1483 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
1484 static int __init
mxser_read_register(int port
, unsigned short *regs
)
1486 int i
, k
, value
, id
;
1489 id
= mxser_program_mode(port
);
1492 for (i
= 0; i
< 14; i
++) {
1493 k
= (i
& 0x3F) | 0x180;
1494 for (j
= 0x100; j
> 0; j
>>= 1) {
1495 outb(CHIP_CS
, port
);
1497 outb(CHIP_CS
| CHIP_DO
, port
);
1498 outb(CHIP_CS
| CHIP_DO
| CHIP_SK
, port
); /* A? bit of read */
1500 outb(CHIP_CS
, port
);
1501 outb(CHIP_CS
| CHIP_SK
, port
); /* A? bit of read */
1506 for (k
= 0, j
= 0x8000; k
< 16; k
++, j
>>= 1) {
1507 outb(CHIP_CS
, port
);
1508 outb(CHIP_CS
| CHIP_SK
, port
);
1509 if (inb(port
) & CHIP_DI
)
1515 mxser_normal_mode(port
);
1519 static int mxser_ioctl_special(unsigned int cmd
, void __user
*argp
)
1521 struct mxser_port
*port
;
1522 struct tty_struct
*tty
;
1528 case MOXA_GET_MAJOR
:
1529 if (printk_ratelimit())
1530 printk(KERN_WARNING
"mxser: '%s' uses deprecated ioctl "
1531 "%x (GET_MAJOR), fix your userspace\n",
1532 current
->comm
, cmd
);
1533 return put_user(ttymajor
, (int __user
*)argp
);
1535 case MOXA_CHKPORTENABLE
:
1538 for (i
= 0; i
< MXSER_BOARDS
; i
++)
1539 for (j
= 0; j
< MXSER_PORTS_PER_BOARD
; j
++)
1540 if (mxser_boards
[i
].ports
[j
].ioaddr
)
1543 return put_user(result
, (unsigned long __user
*)argp
);
1544 case MOXA_GETDATACOUNT
:
1546 if (copy_to_user(argp
, &mxvar_log
, sizeof(mxvar_log
)))
1550 case MOXA_GETMSTATUS
: {
1551 struct mxser_mstatus ms
, __user
*msu
= argp
;
1553 for (i
= 0; i
< MXSER_BOARDS
; i
++)
1554 for (j
= 0; j
< MXSER_PORTS_PER_BOARD
; j
++) {
1555 port
= &mxser_boards
[i
].ports
[j
];
1556 memset(&ms
, 0, sizeof(ms
));
1561 tty
= tty_port_tty_get(&port
->port
);
1563 if (!tty
|| !tty
->termios
)
1564 ms
.cflag
= port
->normal_termios
.c_cflag
;
1566 ms
.cflag
= tty
->termios
->c_cflag
;
1568 status
= inb(port
->ioaddr
+ UART_MSR
);
1569 if (status
& UART_MSR_DCD
)
1571 if (status
& UART_MSR_DSR
)
1573 if (status
& UART_MSR_CTS
)
1576 if (copy_to_user(msu
, &ms
, sizeof(ms
))) {
1585 case MOXA_ASPP_MON_EXT
: {
1586 struct mxser_mon_ext
*me
; /* it's 2k, stack unfriendly */
1587 unsigned int cflag
, iflag
, p
;
1590 me
= kzalloc(sizeof(*me
), GFP_KERNEL
);
1595 for (i
= 0, p
= 0; i
< MXSER_BOARDS
; i
++) {
1596 for (j
= 0; j
< MXSER_PORTS_PER_BOARD
; j
++, p
++) {
1597 if (p
>= ARRAY_SIZE(me
->rx_cnt
)) {
1601 port
= &mxser_boards
[i
].ports
[j
];
1605 status
= mxser_get_msr(port
->ioaddr
, 0, p
);
1607 if (status
& UART_MSR_TERI
)
1609 if (status
& UART_MSR_DDSR
)
1611 if (status
& UART_MSR_DDCD
)
1613 if (status
& UART_MSR_DCTS
)
1616 port
->mon_data
.modem_status
= status
;
1617 me
->rx_cnt
[p
] = port
->mon_data
.rxcnt
;
1618 me
->tx_cnt
[p
] = port
->mon_data
.txcnt
;
1619 me
->up_rxcnt
[p
] = port
->mon_data
.up_rxcnt
;
1620 me
->up_txcnt
[p
] = port
->mon_data
.up_txcnt
;
1621 me
->modem_status
[p
] =
1622 port
->mon_data
.modem_status
;
1623 tty
= tty_port_tty_get(&port
->port
);
1625 if (!tty
|| !tty
->termios
) {
1626 cflag
= port
->normal_termios
.c_cflag
;
1627 iflag
= port
->normal_termios
.c_iflag
;
1628 me
->baudrate
[p
] = tty_termios_baud_rate(&port
->normal_termios
);
1630 cflag
= tty
->termios
->c_cflag
;
1631 iflag
= tty
->termios
->c_iflag
;
1632 me
->baudrate
[p
] = tty_get_baud_rate(tty
);
1636 me
->databits
[p
] = cflag
& CSIZE
;
1637 me
->stopbits
[p
] = cflag
& CSTOPB
;
1638 me
->parity
[p
] = cflag
& (PARENB
| PARODD
|
1641 if (cflag
& CRTSCTS
)
1642 me
->flowctrl
[p
] |= 0x03;
1644 if (iflag
& (IXON
| IXOFF
))
1645 me
->flowctrl
[p
] |= 0x0C;
1647 if (port
->type
== PORT_16550A
)
1650 opmode
= inb(port
->opmode_ioaddr
) >>
1652 opmode
&= OP_MODE_MASK
;
1653 me
->iftype
[p
] = opmode
;
1657 if (copy_to_user(argp
, me
, sizeof(*me
)))
1663 return -ENOIOCTLCMD
;
1668 static int mxser_cflags_changed(struct mxser_port
*info
, unsigned long arg
,
1669 struct async_icount
*cprev
)
1671 struct async_icount cnow
;
1672 unsigned long flags
;
1675 spin_lock_irqsave(&info
->slock
, flags
);
1676 cnow
= info
->icount
; /* atomic copy */
1677 spin_unlock_irqrestore(&info
->slock
, flags
);
1679 ret
= ((arg
& TIOCM_RNG
) && (cnow
.rng
!= cprev
->rng
)) ||
1680 ((arg
& TIOCM_DSR
) && (cnow
.dsr
!= cprev
->dsr
)) ||
1681 ((arg
& TIOCM_CD
) && (cnow
.dcd
!= cprev
->dcd
)) ||
1682 ((arg
& TIOCM_CTS
) && (cnow
.cts
!= cprev
->cts
));
1689 static int mxser_ioctl(struct tty_struct
*tty
, struct file
*file
,
1690 unsigned int cmd
, unsigned long arg
)
1692 struct mxser_port
*info
= tty
->driver_data
;
1693 struct async_icount cnow
;
1694 unsigned long flags
;
1695 void __user
*argp
= (void __user
*)arg
;
1698 if (tty
->index
== MXSER_PORTS
)
1699 return mxser_ioctl_special(cmd
, argp
);
1701 if (cmd
== MOXA_SET_OP_MODE
|| cmd
== MOXA_GET_OP_MODE
) {
1703 unsigned long opmode
;
1704 static unsigned char ModeMask
[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1706 unsigned char val
, mask
;
1709 if (cmd
== MOXA_SET_OP_MODE
) {
1710 if (get_user(opmode
, (int __user
*) argp
))
1712 if (opmode
!= RS232_MODE
&&
1713 opmode
!= RS485_2WIRE_MODE
&&
1714 opmode
!= RS422_MODE
&&
1715 opmode
!= RS485_4WIRE_MODE
)
1720 val
= inb(info
->opmode_ioaddr
);
1722 val
|= (opmode
<< shiftbit
);
1723 outb(val
, info
->opmode_ioaddr
);
1728 opmode
= inb(info
->opmode_ioaddr
) >> shiftbit
;
1729 opmode
&= OP_MODE_MASK
;
1731 if (put_user(opmode
, (int __user
*)argp
))
1737 if (cmd
!= TIOCGSERIAL
&& cmd
!= TIOCMIWAIT
&& cmd
!= TIOCGICOUNT
&&
1738 test_bit(TTY_IO_ERROR
, &tty
->flags
))
1744 retval
= mxser_get_serial_info(tty
, argp
);
1749 retval
= mxser_set_serial_info(tty
, argp
);
1752 case TIOCSERGETLSR
: /* Get line status register */
1753 return mxser_get_lsr_info(info
, argp
);
1755 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1756 * - mask passed in arg for lines of interest
1757 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1758 * Caller should use TIOCGICOUNT to see which one it was
1761 spin_lock_irqsave(&info
->slock
, flags
);
1762 cnow
= info
->icount
; /* note the counters on entry */
1763 spin_unlock_irqrestore(&info
->slock
, flags
);
1765 return wait_event_interruptible(info
->delta_msr_wait
,
1766 mxser_cflags_changed(info
, arg
, &cnow
));
1768 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1769 * Return: write counters to the user passed counter struct
1770 * NB: both 1->0 and 0->1 transitions are counted except for
1771 * RI where only 0->1 is counted.
1774 struct serial_icounter_struct icnt
= { 0 };
1775 spin_lock_irqsave(&info
->slock
, flags
);
1776 cnow
= info
->icount
;
1777 spin_unlock_irqrestore(&info
->slock
, flags
);
1779 icnt
.frame
= cnow
.frame
;
1780 icnt
.brk
= cnow
.brk
;
1781 icnt
.overrun
= cnow
.overrun
;
1782 icnt
.buf_overrun
= cnow
.buf_overrun
;
1783 icnt
.parity
= cnow
.parity
;
1786 icnt
.cts
= cnow
.cts
;
1787 icnt
.dsr
= cnow
.dsr
;
1788 icnt
.rng
= cnow
.rng
;
1789 icnt
.dcd
= cnow
.dcd
;
1791 return copy_to_user(argp
, &icnt
, sizeof(icnt
)) ? -EFAULT
: 0;
1793 case MOXA_HighSpeedOn
:
1794 return put_user(info
->baud_base
!= 115200 ? 1 : 0, (int __user
*)argp
);
1795 case MOXA_SDS_RSTICOUNTER
:
1797 info
->mon_data
.rxcnt
= 0;
1798 info
->mon_data
.txcnt
= 0;
1802 case MOXA_ASPP_OQUEUE
:{
1806 len
= mxser_chars_in_buffer(tty
);
1807 lsr
= inb(info
->ioaddr
+ UART_LSR
) & UART_LSR_TEMT
;
1808 len
+= (lsr
? 0 : 1);
1811 return put_user(len
, (int __user
*)argp
);
1813 case MOXA_ASPP_MON
: {
1817 status
= mxser_get_msr(info
->ioaddr
, 1, tty
->index
);
1818 mxser_check_modem_status(tty
, info
, status
);
1820 mcr
= inb(info
->ioaddr
+ UART_MCR
);
1821 if (mcr
& MOXA_MUST_MCR_XON_FLAG
)
1822 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_XOFFHOLD
;
1824 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_XOFFHOLD
;
1826 if (mcr
& MOXA_MUST_MCR_TX_XON
)
1827 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_XOFFXENT
;
1829 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_XOFFXENT
;
1831 if (tty
->hw_stopped
)
1832 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_CTSHOLD
;
1834 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_CTSHOLD
;
1836 if (copy_to_user(argp
, &info
->mon_data
,
1837 sizeof(struct mxser_mon
)))
1842 case MOXA_ASPP_LSTATUS
: {
1843 if (put_user(info
->err_shadow
, (unsigned char __user
*)argp
))
1846 info
->err_shadow
= 0;
1849 case MOXA_SET_BAUD_METHOD
: {
1852 if (get_user(method
, (int __user
*)argp
))
1854 mxser_set_baud_method
[tty
->index
] = method
;
1855 return put_user(method
, (int __user
*)argp
);
1858 return -ENOIOCTLCMD
;
1863 static void mxser_stoprx(struct tty_struct
*tty
)
1865 struct mxser_port
*info
= tty
->driver_data
;
1867 info
->ldisc_stop_rx
= 1;
1869 if (info
->board
->chip_flag
) {
1870 info
->IER
&= ~MOXA_MUST_RECV_ISR
;
1871 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1873 info
->x_char
= STOP_CHAR(tty
);
1874 outb(0, info
->ioaddr
+ UART_IER
);
1875 info
->IER
|= UART_IER_THRI
;
1876 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1880 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1881 info
->MCR
&= ~UART_MCR_RTS
;
1882 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
1887 * This routine is called by the upper-layer tty layer to signal that
1888 * incoming characters should be throttled.
1890 static void mxser_throttle(struct tty_struct
*tty
)
1895 static void mxser_unthrottle(struct tty_struct
*tty
)
1897 struct mxser_port
*info
= tty
->driver_data
;
1900 info
->ldisc_stop_rx
= 0;
1905 if (info
->board
->chip_flag
) {
1906 info
->IER
|= MOXA_MUST_RECV_ISR
;
1907 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1909 info
->x_char
= START_CHAR(tty
);
1910 outb(0, info
->ioaddr
+ UART_IER
);
1911 info
->IER
|= UART_IER_THRI
;
1912 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1917 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1918 info
->MCR
|= UART_MCR_RTS
;
1919 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
1924 * mxser_stop() and mxser_start()
1926 * This routines are called before setting or resetting tty->stopped.
1927 * They enable or disable transmitter interrupts, as necessary.
1929 static void mxser_stop(struct tty_struct
*tty
)
1931 struct mxser_port
*info
= tty
->driver_data
;
1932 unsigned long flags
;
1934 spin_lock_irqsave(&info
->slock
, flags
);
1935 if (info
->IER
& UART_IER_THRI
) {
1936 info
->IER
&= ~UART_IER_THRI
;
1937 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1939 spin_unlock_irqrestore(&info
->slock
, flags
);
1942 static void mxser_start(struct tty_struct
*tty
)
1944 struct mxser_port
*info
= tty
->driver_data
;
1945 unsigned long flags
;
1947 spin_lock_irqsave(&info
->slock
, flags
);
1948 if (info
->xmit_cnt
&& info
->port
.xmit_buf
) {
1949 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
1950 info
->IER
|= UART_IER_THRI
;
1951 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1953 spin_unlock_irqrestore(&info
->slock
, flags
);
1956 static void mxser_set_termios(struct tty_struct
*tty
, struct ktermios
*old_termios
)
1958 struct mxser_port
*info
= tty
->driver_data
;
1959 unsigned long flags
;
1961 spin_lock_irqsave(&info
->slock
, flags
);
1962 mxser_change_speed(tty
, old_termios
);
1963 spin_unlock_irqrestore(&info
->slock
, flags
);
1965 if ((old_termios
->c_cflag
& CRTSCTS
) &&
1966 !(tty
->termios
->c_cflag
& CRTSCTS
)) {
1967 tty
->hw_stopped
= 0;
1971 /* Handle sw stopped */
1972 if ((old_termios
->c_iflag
& IXON
) &&
1973 !(tty
->termios
->c_iflag
& IXON
)) {
1976 if (info
->board
->chip_flag
) {
1977 spin_lock_irqsave(&info
->slock
, flags
);
1978 mxser_disable_must_rx_software_flow_control(
1980 spin_unlock_irqrestore(&info
->slock
, flags
);
1988 * mxser_wait_until_sent() --- wait until the transmitter is empty
1990 static void mxser_wait_until_sent(struct tty_struct
*tty
, int timeout
)
1992 struct mxser_port
*info
= tty
->driver_data
;
1993 unsigned long orig_jiffies
, char_time
;
1996 if (info
->type
== PORT_UNKNOWN
)
1999 if (info
->xmit_fifo_size
== 0)
2000 return; /* Just in case.... */
2002 orig_jiffies
= jiffies
;
2004 * Set the check interval to be 1/5 of the estimated time to
2005 * send a single character, and make it at least 1. The check
2006 * interval should also be less than the timeout.
2008 * Note: we have to use pretty tight timings here to satisfy
2011 char_time
= (info
->timeout
- HZ
/ 50) / info
->xmit_fifo_size
;
2012 char_time
= char_time
/ 5;
2015 if (timeout
&& timeout
< char_time
)
2016 char_time
= timeout
;
2018 * If the transmitter hasn't cleared in twice the approximate
2019 * amount of time to send the entire FIFO, it probably won't
2020 * ever clear. This assumes the UART isn't doing flow
2021 * control, which is currently the case. Hence, if it ever
2022 * takes longer than info->timeout, this is probably due to a
2023 * UART bug of some kind. So, we clamp the timeout parameter at
2026 if (!timeout
|| timeout
> 2 * info
->timeout
)
2027 timeout
= 2 * info
->timeout
;
2028 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2029 printk(KERN_DEBUG
"In rs_wait_until_sent(%d) check=%lu...",
2030 timeout
, char_time
);
2031 printk("jiff=%lu...", jiffies
);
2034 while (!((lsr
= inb(info
->ioaddr
+ UART_LSR
)) & UART_LSR_TEMT
)) {
2035 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2036 printk("lsr = %d (jiff=%lu)...", lsr
, jiffies
);
2038 schedule_timeout_interruptible(char_time
);
2039 if (signal_pending(current
))
2041 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2044 set_current_state(TASK_RUNNING
);
2047 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2048 printk("lsr = %d (jiff=%lu)...done\n", lsr
, jiffies
);
2053 * This routine is called by tty_hangup() when a hangup is signaled.
2055 static void mxser_hangup(struct tty_struct
*tty
)
2057 struct mxser_port
*info
= tty
->driver_data
;
2059 mxser_flush_buffer(tty
);
2060 mxser_shutdown(tty
);
2061 tty_port_hangup(&info
->port
);
2065 * mxser_rs_break() --- routine which turns the break handling on or off
2067 static int mxser_rs_break(struct tty_struct
*tty
, int break_state
)
2069 struct mxser_port
*info
= tty
->driver_data
;
2070 unsigned long flags
;
2072 spin_lock_irqsave(&info
->slock
, flags
);
2073 if (break_state
== -1)
2074 outb(inb(info
->ioaddr
+ UART_LCR
) | UART_LCR_SBC
,
2075 info
->ioaddr
+ UART_LCR
);
2077 outb(inb(info
->ioaddr
+ UART_LCR
) & ~UART_LCR_SBC
,
2078 info
->ioaddr
+ UART_LCR
);
2079 spin_unlock_irqrestore(&info
->slock
, flags
);
2083 static void mxser_receive_chars(struct tty_struct
*tty
,
2084 struct mxser_port
*port
, int *status
)
2086 unsigned char ch
, gdl
;
2092 recv_room
= tty
->receive_room
;
2093 if (recv_room
== 0 && !port
->ldisc_stop_rx
)
2095 if (port
->board
->chip_flag
!= MOXA_OTHER_UART
) {
2097 if (*status
& UART_LSR_SPECIAL
)
2099 if (port
->board
->chip_flag
== MOXA_MUST_MU860_HWID
&&
2100 (*status
& MOXA_MUST_LSR_RERR
))
2102 if (*status
& MOXA_MUST_LSR_RERR
)
2105 gdl
= inb(port
->ioaddr
+ MOXA_MUST_GDL_REGISTER
);
2107 if (port
->board
->chip_flag
== MOXA_MUST_MU150_HWID
)
2108 gdl
&= MOXA_MUST_GDL_MASK
;
2109 if (gdl
>= recv_room
) {
2110 if (!port
->ldisc_stop_rx
)
2114 ch
= inb(port
->ioaddr
+ UART_RX
);
2115 tty_insert_flip_char(tty
, ch
, 0);
2126 ch
= inb(port
->ioaddr
+ UART_RX
);
2127 if (port
->board
->chip_flag
&& (*status
& UART_LSR_OE
))
2128 outb(0x23, port
->ioaddr
+ UART_FCR
);
2129 *status
&= port
->read_status_mask
;
2130 if (*status
& port
->ignore_status_mask
) {
2131 if (++ignored
> 100)
2135 if (*status
& UART_LSR_SPECIAL
) {
2136 if (*status
& UART_LSR_BI
) {
2140 if (port
->port
.flags
& ASYNC_SAK
)
2142 } else if (*status
& UART_LSR_PE
) {
2144 port
->icount
.parity
++;
2145 } else if (*status
& UART_LSR_FE
) {
2147 port
->icount
.frame
++;
2148 } else if (*status
& UART_LSR_OE
) {
2150 port
->icount
.overrun
++;
2154 tty_insert_flip_char(tty
, ch
, flag
);
2156 if (cnt
>= recv_room
) {
2157 if (!port
->ldisc_stop_rx
)
2164 if (port
->board
->chip_flag
)
2167 *status
= inb(port
->ioaddr
+ UART_LSR
);
2168 } while (*status
& UART_LSR_DR
);
2171 mxvar_log
.rxcnt
[tty
->index
] += cnt
;
2172 port
->mon_data
.rxcnt
+= cnt
;
2173 port
->mon_data
.up_rxcnt
+= cnt
;
2176 * We are called from an interrupt context with &port->slock
2177 * being held. Drop it temporarily in order to prevent
2178 * recursive locking.
2180 spin_unlock(&port
->slock
);
2181 tty_flip_buffer_push(tty
);
2182 spin_lock(&port
->slock
);
2185 static void mxser_transmit_chars(struct tty_struct
*tty
, struct mxser_port
*port
)
2190 outb(port
->x_char
, port
->ioaddr
+ UART_TX
);
2192 mxvar_log
.txcnt
[tty
->index
]++;
2193 port
->mon_data
.txcnt
++;
2194 port
->mon_data
.up_txcnt
++;
2199 if (port
->port
.xmit_buf
== NULL
)
2202 if (port
->xmit_cnt
<= 0 || tty
->stopped
||
2204 (port
->type
!= PORT_16550A
) &&
2205 (!port
->board
->chip_flag
))) {
2206 port
->IER
&= ~UART_IER_THRI
;
2207 outb(port
->IER
, port
->ioaddr
+ UART_IER
);
2211 cnt
= port
->xmit_cnt
;
2212 count
= port
->xmit_fifo_size
;
2214 outb(port
->port
.xmit_buf
[port
->xmit_tail
++],
2215 port
->ioaddr
+ UART_TX
);
2216 port
->xmit_tail
= port
->xmit_tail
& (SERIAL_XMIT_SIZE
- 1);
2217 if (--port
->xmit_cnt
<= 0)
2219 } while (--count
> 0);
2220 mxvar_log
.txcnt
[tty
->index
] += (cnt
- port
->xmit_cnt
);
2222 port
->mon_data
.txcnt
+= (cnt
- port
->xmit_cnt
);
2223 port
->mon_data
.up_txcnt
+= (cnt
- port
->xmit_cnt
);
2224 port
->icount
.tx
+= (cnt
- port
->xmit_cnt
);
2226 if (port
->xmit_cnt
< WAKEUP_CHARS
&& tty
)
2229 if (port
->xmit_cnt
<= 0) {
2230 port
->IER
&= ~UART_IER_THRI
;
2231 outb(port
->IER
, port
->ioaddr
+ UART_IER
);
2236 * This is the serial driver's generic interrupt routine
2238 static irqreturn_t
mxser_interrupt(int irq
, void *dev_id
)
2241 struct mxser_board
*brd
= NULL
;
2242 struct mxser_port
*port
;
2243 int max
, irqbits
, bits
, msr
;
2244 unsigned int int_cnt
, pass_counter
= 0;
2245 int handled
= IRQ_NONE
;
2246 struct tty_struct
*tty
;
2248 for (i
= 0; i
< MXSER_BOARDS
; i
++)
2249 if (dev_id
== &mxser_boards
[i
]) {
2254 if (i
== MXSER_BOARDS
)
2258 max
= brd
->info
->nports
;
2259 while (pass_counter
++ < MXSER_ISR_PASS_LIMIT
) {
2260 irqbits
= inb(brd
->vector
) & brd
->vector_mask
;
2261 if (irqbits
== brd
->vector_mask
)
2264 handled
= IRQ_HANDLED
;
2265 for (i
= 0, bits
= 1; i
< max
; i
++, irqbits
|= bits
, bits
<<= 1) {
2266 if (irqbits
== brd
->vector_mask
)
2270 port
= &brd
->ports
[i
];
2273 spin_lock(&port
->slock
);
2275 iir
= inb(port
->ioaddr
+ UART_IIR
);
2276 if (iir
& UART_IIR_NO_INT
)
2278 iir
&= MOXA_MUST_IIR_MASK
;
2279 tty
= tty_port_tty_get(&port
->port
);
2281 (port
->port
.flags
& ASYNC_CLOSING
) ||
2282 !(port
->port
.flags
&
2283 ASYNC_INITIALIZED
)) {
2284 status
= inb(port
->ioaddr
+ UART_LSR
);
2285 outb(0x27, port
->ioaddr
+ UART_FCR
);
2286 inb(port
->ioaddr
+ UART_MSR
);
2291 status
= inb(port
->ioaddr
+ UART_LSR
);
2293 if (status
& UART_LSR_PE
)
2294 port
->err_shadow
|= NPPI_NOTIFY_PARITY
;
2295 if (status
& UART_LSR_FE
)
2296 port
->err_shadow
|= NPPI_NOTIFY_FRAMING
;
2297 if (status
& UART_LSR_OE
)
2299 NPPI_NOTIFY_HW_OVERRUN
;
2300 if (status
& UART_LSR_BI
)
2301 port
->err_shadow
|= NPPI_NOTIFY_BREAK
;
2303 if (port
->board
->chip_flag
) {
2304 if (iir
== MOXA_MUST_IIR_GDA
||
2305 iir
== MOXA_MUST_IIR_RDA
||
2306 iir
== MOXA_MUST_IIR_RTO
||
2307 iir
== MOXA_MUST_IIR_LSR
)
2308 mxser_receive_chars(tty
, port
,
2312 status
&= port
->read_status_mask
;
2313 if (status
& UART_LSR_DR
)
2314 mxser_receive_chars(tty
, port
,
2317 msr
= inb(port
->ioaddr
+ UART_MSR
);
2318 if (msr
& UART_MSR_ANY_DELTA
)
2319 mxser_check_modem_status(tty
, port
, msr
);
2321 if (port
->board
->chip_flag
) {
2322 if (iir
== 0x02 && (status
&
2324 mxser_transmit_chars(tty
, port
);
2326 if (status
& UART_LSR_THRE
)
2327 mxser_transmit_chars(tty
, port
);
2330 } while (int_cnt
++ < MXSER_ISR_PASS_LIMIT
);
2331 spin_unlock(&port
->slock
);
2339 static const struct tty_operations mxser_ops
= {
2341 .close
= mxser_close
,
2342 .write
= mxser_write
,
2343 .put_char
= mxser_put_char
,
2344 .flush_chars
= mxser_flush_chars
,
2345 .write_room
= mxser_write_room
,
2346 .chars_in_buffer
= mxser_chars_in_buffer
,
2347 .flush_buffer
= mxser_flush_buffer
,
2348 .ioctl
= mxser_ioctl
,
2349 .throttle
= mxser_throttle
,
2350 .unthrottle
= mxser_unthrottle
,
2351 .set_termios
= mxser_set_termios
,
2353 .start
= mxser_start
,
2354 .hangup
= mxser_hangup
,
2355 .break_ctl
= mxser_rs_break
,
2356 .wait_until_sent
= mxser_wait_until_sent
,
2357 .tiocmget
= mxser_tiocmget
,
2358 .tiocmset
= mxser_tiocmset
,
2361 struct tty_port_operations mxser_port_ops
= {
2362 .carrier_raised
= mxser_carrier_raised
,
2363 .dtr_rts
= mxser_dtr_rts
,
2367 * The MOXA Smartio/Industio serial driver boot-time initialization code!
2370 static void mxser_release_res(struct mxser_board
*brd
, struct pci_dev
*pdev
,
2374 free_irq(brd
->irq
, brd
);
2375 if (pdev
!= NULL
) { /* PCI */
2377 pci_release_region(pdev
, 2);
2378 pci_release_region(pdev
, 3);
2381 release_region(brd
->ports
[0].ioaddr
, 8 * brd
->info
->nports
);
2382 release_region(brd
->vector
, 1);
2386 static int __devinit
mxser_initbrd(struct mxser_board
*brd
,
2387 struct pci_dev
*pdev
)
2389 struct mxser_port
*info
;
2393 printk(KERN_INFO
"mxser: max. baud rate = %d bps\n",
2394 brd
->ports
[0].max_baud
);
2396 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2397 info
= &brd
->ports
[i
];
2398 tty_port_init(&info
->port
);
2399 info
->port
.ops
= &mxser_port_ops
;
2402 info
->ldisc_stop_rx
= 0;
2404 /* Enhance mode enabled here */
2405 if (brd
->chip_flag
!= MOXA_OTHER_UART
)
2406 mxser_enable_must_enchance_mode(info
->ioaddr
);
2408 info
->port
.flags
= ASYNC_SHARE_IRQ
;
2409 info
->type
= brd
->uart_type
;
2411 process_txrx_fifo(info
);
2413 info
->custom_divisor
= info
->baud_base
* 16;
2414 info
->port
.close_delay
= 5 * HZ
/ 10;
2415 info
->port
.closing_wait
= 30 * HZ
;
2416 info
->normal_termios
= mxvar_sdriver
->init_termios
;
2417 init_waitqueue_head(&info
->delta_msr_wait
);
2418 memset(&info
->mon_data
, 0, sizeof(struct mxser_mon
));
2419 info
->err_shadow
= 0;
2420 spin_lock_init(&info
->slock
);
2422 /* before set INT ISR, disable all int */
2423 outb(inb(info
->ioaddr
+ UART_IER
) & 0xf0,
2424 info
->ioaddr
+ UART_IER
);
2427 retval
= request_irq(brd
->irq
, mxser_interrupt
, IRQF_SHARED
, "mxser",
2430 printk(KERN_ERR
"Board %s: Request irq failed, IRQ (%d) may "
2431 "conflict with another device.\n",
2432 brd
->info
->name
, brd
->irq
);
2433 /* We hold resources, we need to release them. */
2434 mxser_release_res(brd
, pdev
, 0);
2439 static int __init
mxser_get_ISA_conf(int cap
, struct mxser_board
*brd
)
2442 unsigned short regs
[16], irq
;
2443 unsigned char scratch
, scratch2
;
2445 brd
->chip_flag
= MOXA_OTHER_UART
;
2447 id
= mxser_read_register(cap
, regs
);
2450 brd
->info
= &mxser_cards
[0];
2453 brd
->info
= &mxser_cards
[1];
2455 case CI104J_ASIC_ID
:
2456 brd
->info
= &mxser_cards
[2];
2459 brd
->info
= &mxser_cards
[5];
2462 brd
->info
= &mxser_cards
[6];
2465 brd
->info
= &mxser_cards
[7];
2472 /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2473 Flag-hack checks if configuration should be read as 2-port here. */
2474 if (brd
->info
->nports
== 2 || (brd
->info
->flags
& MXSER_HAS2
)) {
2475 irq
= regs
[9] & 0xF000;
2476 irq
= irq
| (irq
>> 4);
2477 if (irq
!= (regs
[9] & 0xFF00))
2478 goto err_irqconflict
;
2479 } else if (brd
->info
->nports
== 4) {
2480 irq
= regs
[9] & 0xF000;
2481 irq
= irq
| (irq
>> 4);
2482 irq
= irq
| (irq
>> 8);
2484 goto err_irqconflict
;
2485 } else if (brd
->info
->nports
== 8) {
2486 irq
= regs
[9] & 0xF000;
2487 irq
= irq
| (irq
>> 4);
2488 irq
= irq
| (irq
>> 8);
2489 if ((irq
!= regs
[9]) || (irq
!= regs
[10]))
2490 goto err_irqconflict
;
2494 printk(KERN_ERR
"mxser: interrupt number unset\n");
2497 brd
->irq
= ((int)(irq
& 0xF000) >> 12);
2498 for (i
= 0; i
< 8; i
++)
2499 brd
->ports
[i
].ioaddr
= (int) regs
[i
+ 1] & 0xFFF8;
2500 if ((regs
[12] & 0x80) == 0) {
2501 printk(KERN_ERR
"mxser: invalid interrupt vector\n");
2504 brd
->vector
= (int)regs
[11]; /* interrupt vector */
2506 brd
->vector_mask
= 0x00FF;
2508 brd
->vector_mask
= 0x000F;
2509 for (i
= 7, bits
= 0x0100; i
>= 0; i
--, bits
<<= 1) {
2510 if (regs
[12] & bits
) {
2511 brd
->ports
[i
].baud_base
= 921600;
2512 brd
->ports
[i
].max_baud
= 921600;
2514 brd
->ports
[i
].baud_base
= 115200;
2515 brd
->ports
[i
].max_baud
= 115200;
2518 scratch2
= inb(cap
+ UART_LCR
) & (~UART_LCR_DLAB
);
2519 outb(scratch2
| UART_LCR_DLAB
, cap
+ UART_LCR
);
2520 outb(0, cap
+ UART_EFR
); /* EFR is the same as FCR */
2521 outb(scratch2
, cap
+ UART_LCR
);
2522 outb(UART_FCR_ENABLE_FIFO
, cap
+ UART_FCR
);
2523 scratch
= inb(cap
+ UART_IIR
);
2526 brd
->uart_type
= PORT_16550A
;
2528 brd
->uart_type
= PORT_16450
;
2529 if (!request_region(brd
->ports
[0].ioaddr
, 8 * brd
->info
->nports
,
2531 printk(KERN_ERR
"mxser: can't request ports I/O region: "
2532 "0x%.8lx-0x%.8lx\n",
2533 brd
->ports
[0].ioaddr
, brd
->ports
[0].ioaddr
+
2534 8 * brd
->info
->nports
- 1);
2537 if (!request_region(brd
->vector
, 1, "mxser(vector)")) {
2538 release_region(brd
->ports
[0].ioaddr
, 8 * brd
->info
->nports
);
2539 printk(KERN_ERR
"mxser: can't request interrupt vector region: "
2540 "0x%.8lx-0x%.8lx\n",
2541 brd
->ports
[0].ioaddr
, brd
->ports
[0].ioaddr
+
2542 8 * brd
->info
->nports
- 1);
2545 return brd
->info
->nports
;
2548 printk(KERN_ERR
"mxser: invalid interrupt number\n");
2552 static int __devinit
mxser_probe(struct pci_dev
*pdev
,
2553 const struct pci_device_id
*ent
)
2556 struct mxser_board
*brd
;
2558 unsigned long ioaddress
;
2559 int retval
= -EINVAL
;
2561 for (i
= 0; i
< MXSER_BOARDS
; i
++)
2562 if (mxser_boards
[i
].info
== NULL
)
2565 if (i
>= MXSER_BOARDS
) {
2566 dev_err(&pdev
->dev
, "too many boards found (maximum %d), board "
2567 "not configured\n", MXSER_BOARDS
);
2571 brd
= &mxser_boards
[i
];
2572 brd
->idx
= i
* MXSER_PORTS_PER_BOARD
;
2573 dev_info(&pdev
->dev
, "found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2574 mxser_cards
[ent
->driver_data
].name
,
2575 pdev
->bus
->number
, PCI_SLOT(pdev
->devfn
));
2577 retval
= pci_enable_device(pdev
);
2579 dev_err(&pdev
->dev
, "PCI enable failed\n");
2584 ioaddress
= pci_resource_start(pdev
, 2);
2585 retval
= pci_request_region(pdev
, 2, "mxser(IO)");
2589 brd
->info
= &mxser_cards
[ent
->driver_data
];
2590 for (i
= 0; i
< brd
->info
->nports
; i
++)
2591 brd
->ports
[i
].ioaddr
= ioaddress
+ 8 * i
;
2594 ioaddress
= pci_resource_start(pdev
, 3);
2595 retval
= pci_request_region(pdev
, 3, "mxser(vector)");
2598 brd
->vector
= ioaddress
;
2601 brd
->irq
= pdev
->irq
;
2603 brd
->chip_flag
= CheckIsMoxaMust(brd
->ports
[0].ioaddr
);
2604 brd
->uart_type
= PORT_16550A
;
2605 brd
->vector_mask
= 0;
2607 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2608 for (j
= 0; j
< UART_INFO_NUM
; j
++) {
2609 if (Gpci_uart_info
[j
].type
== brd
->chip_flag
) {
2610 brd
->ports
[i
].max_baud
=
2611 Gpci_uart_info
[j
].max_baud
;
2613 /* exception....CP-102 */
2614 if (brd
->info
->flags
& MXSER_HIGHBAUD
)
2615 brd
->ports
[i
].max_baud
= 921600;
2621 if (brd
->chip_flag
== MOXA_MUST_MU860_HWID
) {
2622 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2624 brd
->ports
[i
].opmode_ioaddr
= ioaddress
+ 4;
2626 brd
->ports
[i
].opmode_ioaddr
= ioaddress
+ 0x0c;
2628 outb(0, ioaddress
+ 4); /* default set to RS232 mode */
2629 outb(0, ioaddress
+ 0x0c); /* default set to RS232 mode */
2632 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2633 brd
->vector_mask
|= (1 << i
);
2634 brd
->ports
[i
].baud_base
= 921600;
2637 /* mxser_initbrd will hook ISR. */
2638 retval
= mxser_initbrd(brd
, pdev
);
2642 for (i
= 0; i
< brd
->info
->nports
; i
++)
2643 tty_register_device(mxvar_sdriver
, brd
->idx
+ i
, &pdev
->dev
);
2645 pci_set_drvdata(pdev
, brd
);
2649 pci_release_region(pdev
, 2);
2659 static void __devexit
mxser_remove(struct pci_dev
*pdev
)
2661 struct mxser_board
*brd
= pci_get_drvdata(pdev
);
2664 for (i
= 0; i
< brd
->info
->nports
; i
++)
2665 tty_unregister_device(mxvar_sdriver
, brd
->idx
+ i
);
2667 mxser_release_res(brd
, pdev
, 1);
2671 static struct pci_driver mxser_driver
= {
2673 .id_table
= mxser_pcibrds
,
2674 .probe
= mxser_probe
,
2675 .remove
= __devexit_p(mxser_remove
)
2678 static int __init
mxser_module_init(void)
2680 struct mxser_board
*brd
;
2681 unsigned int b
, i
, m
;
2684 mxvar_sdriver
= alloc_tty_driver(MXSER_PORTS
+ 1);
2688 printk(KERN_INFO
"MOXA Smartio/Industio family driver version %s\n",
2691 /* Initialize the tty_driver structure */
2692 mxvar_sdriver
->owner
= THIS_MODULE
;
2693 mxvar_sdriver
->magic
= TTY_DRIVER_MAGIC
;
2694 mxvar_sdriver
->name
= "ttyMI";
2695 mxvar_sdriver
->major
= ttymajor
;
2696 mxvar_sdriver
->minor_start
= 0;
2697 mxvar_sdriver
->num
= MXSER_PORTS
+ 1;
2698 mxvar_sdriver
->type
= TTY_DRIVER_TYPE_SERIAL
;
2699 mxvar_sdriver
->subtype
= SERIAL_TYPE_NORMAL
;
2700 mxvar_sdriver
->init_termios
= tty_std_termios
;
2701 mxvar_sdriver
->init_termios
.c_cflag
= B9600
|CS8
|CREAD
|HUPCL
|CLOCAL
;
2702 mxvar_sdriver
->flags
= TTY_DRIVER_REAL_RAW
|TTY_DRIVER_DYNAMIC_DEV
;
2703 tty_set_operations(mxvar_sdriver
, &mxser_ops
);
2705 retval
= tty_register_driver(mxvar_sdriver
);
2707 printk(KERN_ERR
"Couldn't install MOXA Smartio/Industio family "
2712 /* Start finding ISA boards here */
2713 for (m
= 0, b
= 0; b
< MXSER_BOARDS
; b
++) {
2717 brd
= &mxser_boards
[m
];
2718 retval
= mxser_get_ISA_conf(ioaddr
[b
], brd
);
2724 printk(KERN_INFO
"mxser: found MOXA %s board (CAP=0x%lx)\n",
2725 brd
->info
->name
, ioaddr
[b
]);
2727 /* mxser_initbrd will hook ISR. */
2728 if (mxser_initbrd(brd
, NULL
) < 0) {
2733 brd
->idx
= m
* MXSER_PORTS_PER_BOARD
;
2734 for (i
= 0; i
< brd
->info
->nports
; i
++)
2735 tty_register_device(mxvar_sdriver
, brd
->idx
+ i
, NULL
);
2740 retval
= pci_register_driver(&mxser_driver
);
2742 printk(KERN_ERR
"mxser: can't register pci driver\n");
2746 } /* else: we have some ISA cards under control */
2751 tty_unregister_driver(mxvar_sdriver
);
2753 put_tty_driver(mxvar_sdriver
);
2757 static void __exit
mxser_module_exit(void)
2761 pci_unregister_driver(&mxser_driver
);
2763 for (i
= 0; i
< MXSER_BOARDS
; i
++) /* ISA remains */
2764 if (mxser_boards
[i
].info
!= NULL
)
2765 for (j
= 0; j
< mxser_boards
[i
].info
->nports
; j
++)
2766 tty_unregister_device(mxvar_sdriver
,
2767 mxser_boards
[i
].idx
+ j
);
2768 tty_unregister_driver(mxvar_sdriver
);
2769 put_tty_driver(mxvar_sdriver
);
2771 for (i
= 0; i
< MXSER_BOARDS
; i
++)
2772 if (mxser_boards
[i
].info
!= NULL
)
2773 mxser_release_res(&mxser_boards
[i
], NULL
, 1);
2776 module_init(mxser_module_init
);
2777 module_exit(mxser_module_exit
);