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/ioport.h>
38 #include <linux/delay.h>
39 #include <linux/pci.h>
40 #include <linux/bitops.h>
41 #include <linux/slab.h>
42 #include <linux/ratelimit.h>
46 #include <asm/uaccess.h>
50 #define MXSER_VERSION "2.0.5" /* 1.14 */
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_CP112UL 0x1120
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, },
143 { "CP-112UL series", 2, },
146 /* driver_data correspond to the lines in the structure above
147 see also ISA probe function before you change something */
148 static struct pci_device_id mxser_pcibrds
[] = {
149 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_C168
), .driver_data
= 3 },
150 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_C104
), .driver_data
= 4 },
151 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP132
), .driver_data
= 8 },
152 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP114
), .driver_data
= 9 },
153 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CT114
), .driver_data
= 10 },
154 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP102
), .driver_data
= 11 },
155 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP104U
), .driver_data
= 12 },
156 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP168U
), .driver_data
= 13 },
157 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP132U
), .driver_data
= 14 },
158 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP134U
), .driver_data
= 15 },
159 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP104JU
),.driver_data
= 16 },
160 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_RC7000
), .driver_data
= 17 },
161 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP118U
), .driver_data
= 18 },
162 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP102UL
),.driver_data
= 19 },
163 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP102U
), .driver_data
= 20 },
164 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP118EL
),.driver_data
= 21 },
165 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP168EL
),.driver_data
= 22 },
166 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_MOXA_CP104EL
),.driver_data
= 23 },
167 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_CB108
), .driver_data
= 24 },
168 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_CB114
), .driver_data
= 25 },
169 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_CB134I
), .driver_data
= 26 },
170 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_CP138U
), .driver_data
= 27 },
171 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_POS104UL
), .driver_data
= 28 },
172 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_CP114UL
), .driver_data
= 29 },
173 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_CP102UF
), .driver_data
= 30 },
174 { PCI_VDEVICE(MOXA
, PCI_DEVICE_ID_CP112UL
), .driver_data
= 31 },
177 MODULE_DEVICE_TABLE(pci
, mxser_pcibrds
);
179 static unsigned long ioaddr
[MXSER_BOARDS
];
180 static int ttymajor
= MXSERMAJOR
;
182 /* Variables for insmod */
184 MODULE_AUTHOR("Casper Yang");
185 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
186 module_param_array(ioaddr
, ulong
, NULL
, 0);
187 MODULE_PARM_DESC(ioaddr
, "ISA io addresses to look for a moxa board");
188 module_param(ttymajor
, int, 0);
189 MODULE_LICENSE("GPL");
193 unsigned long rxcnt
[MXSER_PORTS
];
194 unsigned long txcnt
[MXSER_PORTS
];
200 unsigned long up_rxcnt
;
201 unsigned long up_txcnt
;
203 unsigned char hold_reason
;
206 struct mxser_mon_ext
{
207 unsigned long rx_cnt
[32];
208 unsigned long tx_cnt
[32];
209 unsigned long up_rxcnt
[32];
210 unsigned long up_txcnt
[32];
211 int modem_status
[32];
225 struct tty_port port
;
226 struct mxser_board
*board
;
228 unsigned long ioaddr
;
229 unsigned long opmode_ioaddr
;
233 int rx_trigger
; /* Rx fifo trigger level */
235 int baud_base
; /* max. speed */
236 int type
; /* UART type */
238 int x_char
; /* xon/xoff character */
239 int IER
; /* Interrupt Enable Register */
240 int MCR
; /* Modem control register */
242 unsigned char stop_rx
;
243 unsigned char ldisc_stop_rx
;
246 unsigned char err_shadow
;
248 struct async_icount icount
; /* kernel counters for 4 input interrupts */
251 int read_status_mask
;
252 int ignore_status_mask
;
259 struct ktermios normal_termios
;
261 struct mxser_mon mon_data
;
269 const struct mxser_cardinfo
*info
;
270 unsigned long vector
;
271 unsigned long vector_mask
;
276 struct mxser_port ports
[MXSER_PORTS_PER_BOARD
];
279 struct mxser_mstatus
{
287 static struct mxser_board mxser_boards
[MXSER_BOARDS
];
288 static struct tty_driver
*mxvar_sdriver
;
289 static struct mxser_log mxvar_log
;
290 static int mxser_set_baud_method
[MXSER_PORTS
+ 1];
292 static void mxser_enable_must_enchance_mode(unsigned long baseio
)
297 oldlcr
= inb(baseio
+ UART_LCR
);
298 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
300 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
301 efr
|= MOXA_MUST_EFR_EFRB_ENABLE
;
303 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
304 outb(oldlcr
, baseio
+ UART_LCR
);
308 static void mxser_disable_must_enchance_mode(unsigned long baseio
)
313 oldlcr
= inb(baseio
+ UART_LCR
);
314 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
316 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
317 efr
&= ~MOXA_MUST_EFR_EFRB_ENABLE
;
319 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
320 outb(oldlcr
, baseio
+ UART_LCR
);
324 static void mxser_set_must_xon1_value(unsigned long baseio
, u8 value
)
329 oldlcr
= inb(baseio
+ UART_LCR
);
330 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
332 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
333 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
334 efr
|= MOXA_MUST_EFR_BANK0
;
336 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
337 outb(value
, baseio
+ MOXA_MUST_XON1_REGISTER
);
338 outb(oldlcr
, baseio
+ UART_LCR
);
341 static void mxser_set_must_xoff1_value(unsigned long baseio
, u8 value
)
346 oldlcr
= inb(baseio
+ UART_LCR
);
347 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
349 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
350 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
351 efr
|= MOXA_MUST_EFR_BANK0
;
353 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
354 outb(value
, baseio
+ MOXA_MUST_XOFF1_REGISTER
);
355 outb(oldlcr
, baseio
+ UART_LCR
);
358 static void mxser_set_must_fifo_value(struct mxser_port
*info
)
363 oldlcr
= inb(info
->ioaddr
+ UART_LCR
);
364 outb(MOXA_MUST_ENTER_ENCHANCE
, info
->ioaddr
+ UART_LCR
);
366 efr
= inb(info
->ioaddr
+ MOXA_MUST_EFR_REGISTER
);
367 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
368 efr
|= MOXA_MUST_EFR_BANK1
;
370 outb(efr
, info
->ioaddr
+ MOXA_MUST_EFR_REGISTER
);
371 outb((u8
)info
->rx_high_water
, info
->ioaddr
+ MOXA_MUST_RBRTH_REGISTER
);
372 outb((u8
)info
->rx_trigger
, info
->ioaddr
+ MOXA_MUST_RBRTI_REGISTER
);
373 outb((u8
)info
->rx_low_water
, info
->ioaddr
+ MOXA_MUST_RBRTL_REGISTER
);
374 outb(oldlcr
, info
->ioaddr
+ UART_LCR
);
377 static void mxser_set_must_enum_value(unsigned long baseio
, u8 value
)
382 oldlcr
= inb(baseio
+ UART_LCR
);
383 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
385 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
386 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
387 efr
|= MOXA_MUST_EFR_BANK2
;
389 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
390 outb(value
, baseio
+ MOXA_MUST_ENUM_REGISTER
);
391 outb(oldlcr
, baseio
+ UART_LCR
);
395 static void mxser_get_must_hardware_id(unsigned long baseio
, u8
*pId
)
400 oldlcr
= inb(baseio
+ UART_LCR
);
401 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
403 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
404 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
405 efr
|= MOXA_MUST_EFR_BANK2
;
407 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
408 *pId
= inb(baseio
+ MOXA_MUST_HWID_REGISTER
);
409 outb(oldlcr
, baseio
+ UART_LCR
);
413 static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio
)
418 oldlcr
= inb(baseio
+ UART_LCR
);
419 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
421 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
422 efr
&= ~MOXA_MUST_EFR_SF_MASK
;
424 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
425 outb(oldlcr
, baseio
+ UART_LCR
);
428 static void mxser_enable_must_tx_software_flow_control(unsigned long baseio
)
433 oldlcr
= inb(baseio
+ UART_LCR
);
434 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
436 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
437 efr
&= ~MOXA_MUST_EFR_SF_TX_MASK
;
438 efr
|= MOXA_MUST_EFR_SF_TX1
;
440 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
441 outb(oldlcr
, baseio
+ UART_LCR
);
444 static void mxser_disable_must_tx_software_flow_control(unsigned long baseio
)
449 oldlcr
= inb(baseio
+ UART_LCR
);
450 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
452 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
453 efr
&= ~MOXA_MUST_EFR_SF_TX_MASK
;
455 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
456 outb(oldlcr
, baseio
+ UART_LCR
);
459 static void mxser_enable_must_rx_software_flow_control(unsigned long baseio
)
464 oldlcr
= inb(baseio
+ UART_LCR
);
465 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
467 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
468 efr
&= ~MOXA_MUST_EFR_SF_RX_MASK
;
469 efr
|= MOXA_MUST_EFR_SF_RX1
;
471 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
472 outb(oldlcr
, baseio
+ UART_LCR
);
475 static void mxser_disable_must_rx_software_flow_control(unsigned long baseio
)
480 oldlcr
= inb(baseio
+ UART_LCR
);
481 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
483 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
484 efr
&= ~MOXA_MUST_EFR_SF_RX_MASK
;
486 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
487 outb(oldlcr
, baseio
+ UART_LCR
);
491 static int CheckIsMoxaMust(unsigned long io
)
496 outb(0, io
+ UART_LCR
);
497 mxser_disable_must_enchance_mode(io
);
498 oldmcr
= inb(io
+ UART_MCR
);
499 outb(0, io
+ UART_MCR
);
500 mxser_set_must_xon1_value(io
, 0x11);
501 if ((hwid
= inb(io
+ UART_MCR
)) != 0) {
502 outb(oldmcr
, io
+ UART_MCR
);
503 return MOXA_OTHER_UART
;
506 mxser_get_must_hardware_id(io
, &hwid
);
507 for (i
= 1; i
< UART_INFO_NUM
; i
++) { /* 0 = OTHER_UART */
508 if (hwid
== Gpci_uart_info
[i
].type
)
511 return MOXA_OTHER_UART
;
515 static void process_txrx_fifo(struct mxser_port
*info
)
519 if ((info
->type
== PORT_16450
) || (info
->type
== PORT_8250
)) {
520 info
->rx_trigger
= 1;
521 info
->rx_high_water
= 1;
522 info
->rx_low_water
= 1;
523 info
->xmit_fifo_size
= 1;
525 for (i
= 0; i
< UART_INFO_NUM
; i
++)
526 if (info
->board
->chip_flag
== Gpci_uart_info
[i
].type
) {
527 info
->rx_trigger
= Gpci_uart_info
[i
].rx_trigger
;
528 info
->rx_low_water
= Gpci_uart_info
[i
].rx_low_water
;
529 info
->rx_high_water
= Gpci_uart_info
[i
].rx_high_water
;
530 info
->xmit_fifo_size
= Gpci_uart_info
[i
].xmit_fifo_size
;
535 static unsigned char mxser_get_msr(int baseaddr
, int mode
, int port
)
537 static unsigned char mxser_msr
[MXSER_PORTS
+ 1];
538 unsigned char status
= 0;
540 status
= inb(baseaddr
+ UART_MSR
);
542 mxser_msr
[port
] &= 0x0F;
543 mxser_msr
[port
] |= status
;
544 status
= mxser_msr
[port
];
551 static int mxser_carrier_raised(struct tty_port
*port
)
553 struct mxser_port
*mp
= container_of(port
, struct mxser_port
, port
);
554 return (inb(mp
->ioaddr
+ UART_MSR
) & UART_MSR_DCD
)?1:0;
557 static void mxser_dtr_rts(struct tty_port
*port
, int on
)
559 struct mxser_port
*mp
= container_of(port
, struct mxser_port
, port
);
562 spin_lock_irqsave(&mp
->slock
, flags
);
564 outb(inb(mp
->ioaddr
+ UART_MCR
) |
565 UART_MCR_DTR
| UART_MCR_RTS
, mp
->ioaddr
+ UART_MCR
);
567 outb(inb(mp
->ioaddr
+ UART_MCR
)&~(UART_MCR_DTR
| UART_MCR_RTS
),
568 mp
->ioaddr
+ UART_MCR
);
569 spin_unlock_irqrestore(&mp
->slock
, flags
);
572 static int mxser_set_baud(struct tty_struct
*tty
, long newspd
)
574 struct mxser_port
*info
= tty
->driver_data
;
581 if (newspd
> info
->max_baud
)
585 quot
= 2 * info
->baud_base
/ 269;
586 tty_encode_baud_rate(tty
, 134, 134);
588 quot
= info
->baud_base
/ newspd
;
591 baud
= info
->baud_base
/quot
;
592 tty_encode_baud_rate(tty
, baud
, baud
);
597 info
->timeout
= ((info
->xmit_fifo_size
* HZ
* 10 * quot
) / info
->baud_base
);
598 info
->timeout
+= HZ
/ 50; /* Add .02 seconds of slop */
601 info
->MCR
|= UART_MCR_DTR
;
602 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
604 info
->MCR
&= ~UART_MCR_DTR
;
605 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
609 cval
= inb(info
->ioaddr
+ UART_LCR
);
611 outb(cval
| UART_LCR_DLAB
, info
->ioaddr
+ UART_LCR
); /* set DLAB */
613 outb(quot
& 0xff, info
->ioaddr
+ UART_DLL
); /* LS of divisor */
614 outb(quot
>> 8, info
->ioaddr
+ UART_DLM
); /* MS of divisor */
615 outb(cval
, info
->ioaddr
+ UART_LCR
); /* reset DLAB */
618 if (C_BAUD(tty
) == BOTHER
) {
619 quot
= info
->baud_base
% newspd
;
621 if (quot
% newspd
> newspd
/ 2) {
627 mxser_set_must_enum_value(info
->ioaddr
, quot
);
630 mxser_set_must_enum_value(info
->ioaddr
, 0);
636 * This routine is called to set the UART divisor registers to match
637 * the specified baud rate for a serial port.
639 static int mxser_change_speed(struct tty_struct
*tty
,
640 struct ktermios
*old_termios
)
642 struct mxser_port
*info
= tty
->driver_data
;
643 unsigned cflag
, cval
, fcr
;
645 unsigned char status
;
647 cflag
= tty
->termios
.c_cflag
;
651 if (mxser_set_baud_method
[tty
->index
] == 0)
652 mxser_set_baud(tty
, tty_get_baud_rate(tty
));
654 /* byte size and parity */
655 switch (cflag
& CSIZE
) {
670 break; /* too keep GCC shut... */
675 cval
|= UART_LCR_PARITY
;
676 if (!(cflag
& PARODD
))
677 cval
|= UART_LCR_EPAR
;
679 cval
|= UART_LCR_SPAR
;
681 if ((info
->type
== PORT_8250
) || (info
->type
== PORT_16450
)) {
682 if (info
->board
->chip_flag
) {
683 fcr
= UART_FCR_ENABLE_FIFO
;
684 fcr
|= MOXA_MUST_FCR_GDA_MODE_ENABLE
;
685 mxser_set_must_fifo_value(info
);
689 fcr
= UART_FCR_ENABLE_FIFO
;
690 if (info
->board
->chip_flag
) {
691 fcr
|= MOXA_MUST_FCR_GDA_MODE_ENABLE
;
692 mxser_set_must_fifo_value(info
);
694 switch (info
->rx_trigger
) {
696 fcr
|= UART_FCR_TRIGGER_1
;
699 fcr
|= UART_FCR_TRIGGER_4
;
702 fcr
|= UART_FCR_TRIGGER_8
;
705 fcr
|= UART_FCR_TRIGGER_14
;
711 /* CTS flow control flag and modem status interrupts */
712 info
->IER
&= ~UART_IER_MSI
;
713 info
->MCR
&= ~UART_MCR_AFE
;
714 if (cflag
& CRTSCTS
) {
715 info
->port
.flags
|= ASYNC_CTS_FLOW
;
716 info
->IER
|= UART_IER_MSI
;
717 if ((info
->type
== PORT_16550A
) || (info
->board
->chip_flag
)) {
718 info
->MCR
|= UART_MCR_AFE
;
720 status
= inb(info
->ioaddr
+ UART_MSR
);
721 if (tty
->hw_stopped
) {
722 if (status
& UART_MSR_CTS
) {
724 if (info
->type
!= PORT_16550A
&&
725 !info
->board
->chip_flag
) {
726 outb(info
->IER
& ~UART_IER_THRI
,
729 info
->IER
|= UART_IER_THRI
;
730 outb(info
->IER
, info
->ioaddr
+
736 if (!(status
& UART_MSR_CTS
)) {
738 if ((info
->type
!= PORT_16550A
) &&
739 (!info
->board
->chip_flag
)) {
740 info
->IER
&= ~UART_IER_THRI
;
741 outb(info
->IER
, info
->ioaddr
+
748 info
->port
.flags
&= ~ASYNC_CTS_FLOW
;
750 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
751 if (cflag
& CLOCAL
) {
752 info
->port
.flags
&= ~ASYNC_CHECK_CD
;
754 info
->port
.flags
|= ASYNC_CHECK_CD
;
755 info
->IER
|= UART_IER_MSI
;
757 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
760 * Set up parity check flag
762 info
->read_status_mask
= UART_LSR_OE
| UART_LSR_THRE
| UART_LSR_DR
;
764 info
->read_status_mask
|= UART_LSR_FE
| UART_LSR_PE
;
765 if (I_BRKINT(tty
) || I_PARMRK(tty
))
766 info
->read_status_mask
|= UART_LSR_BI
;
768 info
->ignore_status_mask
= 0;
771 info
->ignore_status_mask
|= UART_LSR_BI
;
772 info
->read_status_mask
|= UART_LSR_BI
;
774 * If we're ignore parity and break indicators, ignore
775 * overruns too. (For real raw support).
778 info
->ignore_status_mask
|=
782 info
->read_status_mask
|=
788 if (info
->board
->chip_flag
) {
789 mxser_set_must_xon1_value(info
->ioaddr
, START_CHAR(tty
));
790 mxser_set_must_xoff1_value(info
->ioaddr
, STOP_CHAR(tty
));
792 mxser_enable_must_rx_software_flow_control(
795 mxser_disable_must_rx_software_flow_control(
799 mxser_enable_must_tx_software_flow_control(
802 mxser_disable_must_tx_software_flow_control(
808 outb(fcr
, info
->ioaddr
+ UART_FCR
); /* set fcr */
809 outb(cval
, info
->ioaddr
+ UART_LCR
);
814 static void mxser_check_modem_status(struct tty_struct
*tty
,
815 struct mxser_port
*port
, int status
)
817 /* update input line counters */
818 if (status
& UART_MSR_TERI
)
820 if (status
& UART_MSR_DDSR
)
822 if (status
& UART_MSR_DDCD
)
824 if (status
& UART_MSR_DCTS
)
826 port
->mon_data
.modem_status
= status
;
827 wake_up_interruptible(&port
->port
.delta_msr_wait
);
829 if ((port
->port
.flags
& ASYNC_CHECK_CD
) && (status
& UART_MSR_DDCD
)) {
830 if (status
& UART_MSR_DCD
)
831 wake_up_interruptible(&port
->port
.open_wait
);
834 if (tty_port_cts_enabled(&port
->port
)) {
835 if (tty
->hw_stopped
) {
836 if (status
& UART_MSR_CTS
) {
839 if ((port
->type
!= PORT_16550A
) &&
840 (!port
->board
->chip_flag
)) {
841 outb(port
->IER
& ~UART_IER_THRI
,
842 port
->ioaddr
+ UART_IER
);
843 port
->IER
|= UART_IER_THRI
;
844 outb(port
->IER
, port
->ioaddr
+
850 if (!(status
& UART_MSR_CTS
)) {
852 if (port
->type
!= PORT_16550A
&&
853 !port
->board
->chip_flag
) {
854 port
->IER
&= ~UART_IER_THRI
;
855 outb(port
->IER
, port
->ioaddr
+
863 static int mxser_activate(struct tty_port
*port
, struct tty_struct
*tty
)
865 struct mxser_port
*info
= container_of(port
, struct mxser_port
, port
);
869 page
= __get_free_page(GFP_KERNEL
);
873 spin_lock_irqsave(&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 info
->port
.xmit_buf
= (unsigned char *) page
;
884 * Clear the FIFO buffers and disable them
885 * (they will be reenabled in mxser_change_speed())
887 if (info
->board
->chip_flag
)
888 outb((UART_FCR_CLEAR_RCVR
|
889 UART_FCR_CLEAR_XMIT
|
890 MOXA_MUST_FCR_GDA_MODE_ENABLE
), info
->ioaddr
+ UART_FCR
);
892 outb((UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
),
893 info
->ioaddr
+ UART_FCR
);
896 * At this point there's no way the LSR could still be 0xFF;
897 * if it is, then bail out, because there's likely no UART
900 if (inb(info
->ioaddr
+ UART_LSR
) == 0xff) {
901 spin_unlock_irqrestore(&info
->slock
, flags
);
902 if (capable(CAP_SYS_ADMIN
)) {
903 set_bit(TTY_IO_ERROR
, &tty
->flags
);
910 * Clear the interrupt registers.
912 (void) inb(info
->ioaddr
+ UART_LSR
);
913 (void) inb(info
->ioaddr
+ UART_RX
);
914 (void) inb(info
->ioaddr
+ UART_IIR
);
915 (void) inb(info
->ioaddr
+ UART_MSR
);
918 * Now, initialize the UART
920 outb(UART_LCR_WLEN8
, info
->ioaddr
+ UART_LCR
); /* reset DLAB */
921 info
->MCR
= UART_MCR_DTR
| UART_MCR_RTS
;
922 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
925 * Finally, enable interrupts
927 info
->IER
= UART_IER_MSI
| UART_IER_RLSI
| UART_IER_RDI
;
929 if (info
->board
->chip_flag
)
930 info
->IER
|= MOXA_MUST_IER_EGDAI
;
931 outb(info
->IER
, info
->ioaddr
+ UART_IER
); /* enable interrupts */
934 * And clear the interrupt registers again for luck.
936 (void) inb(info
->ioaddr
+ UART_LSR
);
937 (void) inb(info
->ioaddr
+ UART_RX
);
938 (void) inb(info
->ioaddr
+ UART_IIR
);
939 (void) inb(info
->ioaddr
+ UART_MSR
);
941 clear_bit(TTY_IO_ERROR
, &tty
->flags
);
942 info
->xmit_cnt
= info
->xmit_head
= info
->xmit_tail
= 0;
945 * and set the speed of the serial port
947 mxser_change_speed(tty
, NULL
);
948 spin_unlock_irqrestore(&info
->slock
, flags
);
954 * This routine will shutdown a serial port
956 static void mxser_shutdown_port(struct tty_port
*port
)
958 struct mxser_port
*info
= container_of(port
, struct mxser_port
, port
);
961 spin_lock_irqsave(&info
->slock
, flags
);
964 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
965 * here so the queue might never be waken up
967 wake_up_interruptible(&info
->port
.delta_msr_wait
);
970 * Free the xmit buffer, if necessary
972 if (info
->port
.xmit_buf
) {
973 free_page((unsigned long) info
->port
.xmit_buf
);
974 info
->port
.xmit_buf
= NULL
;
978 outb(0x00, info
->ioaddr
+ UART_IER
);
980 /* clear Rx/Tx FIFO's */
981 if (info
->board
->chip_flag
)
982 outb(UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
|
983 MOXA_MUST_FCR_GDA_MODE_ENABLE
,
984 info
->ioaddr
+ UART_FCR
);
986 outb(UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
,
987 info
->ioaddr
+ UART_FCR
);
989 /* read data port to reset things */
990 (void) inb(info
->ioaddr
+ UART_RX
);
993 if (info
->board
->chip_flag
)
994 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info
->ioaddr
);
996 spin_unlock_irqrestore(&info
->slock
, flags
);
1000 * This routine is called whenever a serial port is opened. It
1001 * enables interrupts for a serial port, linking in its async structure into
1002 * the IRQ chain. It also performs the serial-specific
1003 * initialization for the tty structure.
1005 static int mxser_open(struct tty_struct
*tty
, struct file
*filp
)
1007 struct mxser_port
*info
;
1011 if (line
== MXSER_PORTS
)
1013 info
= &mxser_boards
[line
/ MXSER_PORTS_PER_BOARD
].ports
[line
% MXSER_PORTS_PER_BOARD
];
1017 tty
->driver_data
= info
;
1018 return tty_port_open(&info
->port
, tty
, filp
);
1021 static void mxser_flush_buffer(struct tty_struct
*tty
)
1023 struct mxser_port
*info
= tty
->driver_data
;
1025 unsigned long flags
;
1028 spin_lock_irqsave(&info
->slock
, flags
);
1029 info
->xmit_cnt
= info
->xmit_head
= info
->xmit_tail
= 0;
1031 fcr
= inb(info
->ioaddr
+ UART_FCR
);
1032 outb((fcr
| UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
),
1033 info
->ioaddr
+ UART_FCR
);
1034 outb(fcr
, info
->ioaddr
+ UART_FCR
);
1036 spin_unlock_irqrestore(&info
->slock
, flags
);
1042 static void mxser_close_port(struct tty_port
*port
)
1044 struct mxser_port
*info
= container_of(port
, struct mxser_port
, port
);
1045 unsigned long timeout
;
1047 * At this point we stop accepting input. To do this, we
1048 * disable the receive line status interrupts, and tell the
1049 * interrupt driver to stop checking the data ready bit in the
1050 * line status register.
1052 info
->IER
&= ~UART_IER_RLSI
;
1053 if (info
->board
->chip_flag
)
1054 info
->IER
&= ~MOXA_MUST_RECV_ISR
;
1056 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1058 * Before we drop DTR, make sure the UART transmitter
1059 * has completely drained; this is especially
1060 * important if there is a transmit FIFO!
1062 timeout
= jiffies
+ HZ
;
1063 while (!(inb(info
->ioaddr
+ UART_LSR
) & UART_LSR_TEMT
)) {
1064 schedule_timeout_interruptible(5);
1065 if (time_after(jiffies
, timeout
))
1071 * This routine is called when the serial port gets closed. First, we
1072 * wait for the last remaining data to be sent. Then, we unlink its
1073 * async structure from the interrupt chain if necessary, and we free
1074 * that IRQ if nothing is left in the chain.
1076 static void mxser_close(struct tty_struct
*tty
, struct file
*filp
)
1078 struct mxser_port
*info
= tty
->driver_data
;
1079 struct tty_port
*port
= &info
->port
;
1081 if (tty
->index
== MXSER_PORTS
|| info
== NULL
)
1083 if (tty_port_close_start(port
, tty
, filp
) == 0)
1086 mutex_lock(&port
->mutex
);
1087 mxser_close_port(port
);
1088 mxser_flush_buffer(tty
);
1089 if (test_bit(ASYNCB_INITIALIZED
, &port
->flags
)) {
1091 tty_port_lower_dtr_rts(port
);
1093 mxser_shutdown_port(port
);
1094 clear_bit(ASYNCB_INITIALIZED
, &port
->flags
);
1095 mutex_unlock(&port
->mutex
);
1097 /* Right now the tty_port set is done outside of the close_end helper
1098 as we don't yet have everyone using refcounts */
1099 tty_port_close_end(port
, tty
);
1100 tty_port_tty_set(port
, NULL
);
1103 static int mxser_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
1106 struct mxser_port
*info
= tty
->driver_data
;
1107 unsigned long flags
;
1109 if (!info
->port
.xmit_buf
)
1113 c
= min_t(int, count
, min(SERIAL_XMIT_SIZE
- info
->xmit_cnt
- 1,
1114 SERIAL_XMIT_SIZE
- info
->xmit_head
));
1118 memcpy(info
->port
.xmit_buf
+ info
->xmit_head
, buf
, c
);
1119 spin_lock_irqsave(&info
->slock
, flags
);
1120 info
->xmit_head
= (info
->xmit_head
+ c
) &
1121 (SERIAL_XMIT_SIZE
- 1);
1122 info
->xmit_cnt
+= c
;
1123 spin_unlock_irqrestore(&info
->slock
, flags
);
1130 if (info
->xmit_cnt
&& !tty
->stopped
) {
1131 if (!tty
->hw_stopped
||
1132 (info
->type
== PORT_16550A
) ||
1133 (info
->board
->chip_flag
)) {
1134 spin_lock_irqsave(&info
->slock
, flags
);
1135 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+
1137 info
->IER
|= UART_IER_THRI
;
1138 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1139 spin_unlock_irqrestore(&info
->slock
, flags
);
1145 static int mxser_put_char(struct tty_struct
*tty
, unsigned char ch
)
1147 struct mxser_port
*info
= tty
->driver_data
;
1148 unsigned long flags
;
1150 if (!info
->port
.xmit_buf
)
1153 if (info
->xmit_cnt
>= SERIAL_XMIT_SIZE
- 1)
1156 spin_lock_irqsave(&info
->slock
, flags
);
1157 info
->port
.xmit_buf
[info
->xmit_head
++] = ch
;
1158 info
->xmit_head
&= SERIAL_XMIT_SIZE
- 1;
1160 spin_unlock_irqrestore(&info
->slock
, flags
);
1161 if (!tty
->stopped
) {
1162 if (!tty
->hw_stopped
||
1163 (info
->type
== PORT_16550A
) ||
1164 info
->board
->chip_flag
) {
1165 spin_lock_irqsave(&info
->slock
, flags
);
1166 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
1167 info
->IER
|= UART_IER_THRI
;
1168 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1169 spin_unlock_irqrestore(&info
->slock
, flags
);
1176 static void mxser_flush_chars(struct tty_struct
*tty
)
1178 struct mxser_port
*info
= tty
->driver_data
;
1179 unsigned long flags
;
1181 if (info
->xmit_cnt
<= 0 || tty
->stopped
|| !info
->port
.xmit_buf
||
1182 (tty
->hw_stopped
&& info
->type
!= PORT_16550A
&&
1183 !info
->board
->chip_flag
))
1186 spin_lock_irqsave(&info
->slock
, flags
);
1188 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
1189 info
->IER
|= UART_IER_THRI
;
1190 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1192 spin_unlock_irqrestore(&info
->slock
, flags
);
1195 static int mxser_write_room(struct tty_struct
*tty
)
1197 struct mxser_port
*info
= tty
->driver_data
;
1200 ret
= SERIAL_XMIT_SIZE
- info
->xmit_cnt
- 1;
1201 return ret
< 0 ? 0 : ret
;
1204 static int mxser_chars_in_buffer(struct tty_struct
*tty
)
1206 struct mxser_port
*info
= tty
->driver_data
;
1207 return info
->xmit_cnt
;
1211 * ------------------------------------------------------------
1212 * friends of mxser_ioctl()
1213 * ------------------------------------------------------------
1215 static int mxser_get_serial_info(struct tty_struct
*tty
,
1216 struct serial_struct __user
*retinfo
)
1218 struct mxser_port
*info
= tty
->driver_data
;
1219 struct serial_struct tmp
= {
1222 .port
= info
->ioaddr
,
1223 .irq
= info
->board
->irq
,
1224 .flags
= info
->port
.flags
,
1225 .baud_base
= info
->baud_base
,
1226 .close_delay
= info
->port
.close_delay
,
1227 .closing_wait
= info
->port
.closing_wait
,
1228 .custom_divisor
= info
->custom_divisor
,
1231 if (copy_to_user(retinfo
, &tmp
, sizeof(*retinfo
)))
1236 static int mxser_set_serial_info(struct tty_struct
*tty
,
1237 struct serial_struct __user
*new_info
)
1239 struct mxser_port
*info
= tty
->driver_data
;
1240 struct tty_port
*port
= &info
->port
;
1241 struct serial_struct new_serial
;
1243 unsigned long sl_flags
;
1247 if (!new_info
|| !info
->ioaddr
)
1249 if (copy_from_user(&new_serial
, new_info
, sizeof(new_serial
)))
1252 if (new_serial
.irq
!= info
->board
->irq
||
1253 new_serial
.port
!= info
->ioaddr
)
1256 flags
= port
->flags
& ASYNC_SPD_MASK
;
1258 if (!capable(CAP_SYS_ADMIN
)) {
1259 if ((new_serial
.baud_base
!= info
->baud_base
) ||
1260 (new_serial
.close_delay
!= info
->port
.close_delay
) ||
1261 ((new_serial
.flags
& ~ASYNC_USR_MASK
) != (info
->port
.flags
& ~ASYNC_USR_MASK
)))
1263 info
->port
.flags
= ((info
->port
.flags
& ~ASYNC_USR_MASK
) |
1264 (new_serial
.flags
& ASYNC_USR_MASK
));
1267 * OK, past this point, all the error checking has been done.
1268 * At this point, we start making changes.....
1270 port
->flags
= ((port
->flags
& ~ASYNC_FLAGS
) |
1271 (new_serial
.flags
& ASYNC_FLAGS
));
1272 port
->close_delay
= new_serial
.close_delay
* HZ
/ 100;
1273 port
->closing_wait
= new_serial
.closing_wait
* HZ
/ 100;
1274 port
->low_latency
= (port
->flags
& ASYNC_LOW_LATENCY
) ? 1 : 0;
1275 if ((port
->flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_CUST
&&
1276 (new_serial
.baud_base
!= info
->baud_base
||
1277 new_serial
.custom_divisor
!=
1278 info
->custom_divisor
)) {
1279 if (new_serial
.custom_divisor
== 0)
1281 baud
= new_serial
.baud_base
/ new_serial
.custom_divisor
;
1282 tty_encode_baud_rate(tty
, baud
, baud
);
1286 info
->type
= new_serial
.type
;
1288 process_txrx_fifo(info
);
1290 if (test_bit(ASYNCB_INITIALIZED
, &port
->flags
)) {
1291 if (flags
!= (port
->flags
& ASYNC_SPD_MASK
)) {
1292 spin_lock_irqsave(&info
->slock
, sl_flags
);
1293 mxser_change_speed(tty
, NULL
);
1294 spin_unlock_irqrestore(&info
->slock
, sl_flags
);
1297 retval
= mxser_activate(port
, tty
);
1299 set_bit(ASYNCB_INITIALIZED
, &port
->flags
);
1305 * mxser_get_lsr_info - get line status register info
1307 * Purpose: Let user call ioctl() to get info when the UART physically
1308 * is emptied. On bus types like RS485, the transmitter must
1309 * release the bus after transmitting. This must be done when
1310 * the transmit shift register is empty, not be done when the
1311 * transmit holding register is empty. This functionality
1312 * allows an RS485 driver to be written in user space.
1314 static int mxser_get_lsr_info(struct mxser_port
*info
,
1315 unsigned int __user
*value
)
1317 unsigned char status
;
1318 unsigned int result
;
1319 unsigned long flags
;
1321 spin_lock_irqsave(&info
->slock
, flags
);
1322 status
= inb(info
->ioaddr
+ UART_LSR
);
1323 spin_unlock_irqrestore(&info
->slock
, flags
);
1324 result
= ((status
& UART_LSR_TEMT
) ? TIOCSER_TEMT
: 0);
1325 return put_user(result
, value
);
1328 static int mxser_tiocmget(struct tty_struct
*tty
)
1330 struct mxser_port
*info
= tty
->driver_data
;
1331 unsigned char control
, status
;
1332 unsigned long flags
;
1335 if (tty
->index
== MXSER_PORTS
)
1336 return -ENOIOCTLCMD
;
1337 if (tty_io_error(tty
))
1340 control
= info
->MCR
;
1342 spin_lock_irqsave(&info
->slock
, flags
);
1343 status
= inb(info
->ioaddr
+ UART_MSR
);
1344 if (status
& UART_MSR_ANY_DELTA
)
1345 mxser_check_modem_status(tty
, info
, status
);
1346 spin_unlock_irqrestore(&info
->slock
, flags
);
1347 return ((control
& UART_MCR_RTS
) ? TIOCM_RTS
: 0) |
1348 ((control
& UART_MCR_DTR
) ? TIOCM_DTR
: 0) |
1349 ((status
& UART_MSR_DCD
) ? TIOCM_CAR
: 0) |
1350 ((status
& UART_MSR_RI
) ? TIOCM_RNG
: 0) |
1351 ((status
& UART_MSR_DSR
) ? TIOCM_DSR
: 0) |
1352 ((status
& UART_MSR_CTS
) ? TIOCM_CTS
: 0);
1355 static int mxser_tiocmset(struct tty_struct
*tty
,
1356 unsigned int set
, unsigned int clear
)
1358 struct mxser_port
*info
= tty
->driver_data
;
1359 unsigned long flags
;
1362 if (tty
->index
== MXSER_PORTS
)
1363 return -ENOIOCTLCMD
;
1364 if (tty_io_error(tty
))
1367 spin_lock_irqsave(&info
->slock
, flags
);
1369 if (set
& TIOCM_RTS
)
1370 info
->MCR
|= UART_MCR_RTS
;
1371 if (set
& TIOCM_DTR
)
1372 info
->MCR
|= UART_MCR_DTR
;
1374 if (clear
& TIOCM_RTS
)
1375 info
->MCR
&= ~UART_MCR_RTS
;
1376 if (clear
& TIOCM_DTR
)
1377 info
->MCR
&= ~UART_MCR_DTR
;
1379 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
1380 spin_unlock_irqrestore(&info
->slock
, flags
);
1384 static int __init
mxser_program_mode(int port
)
1396 id
= inb(port
+ 1) & 0x1F;
1397 if ((id
!= C168_ASIC_ID
) &&
1398 (id
!= C104_ASIC_ID
) &&
1399 (id
!= C102_ASIC_ID
) &&
1400 (id
!= CI132_ASIC_ID
) &&
1401 (id
!= CI134_ASIC_ID
) &&
1402 (id
!= CI104J_ASIC_ID
))
1404 for (i
= 0, j
= 0; i
< 4; i
++) {
1408 } else if ((j
== 1) && (n
== 1)) {
1419 static void __init
mxser_normal_mode(int port
)
1423 outb(0xA5, port
+ 1);
1424 outb(0x80, port
+ 3);
1425 outb(12, port
+ 0); /* 9600 bps */
1427 outb(0x03, port
+ 3); /* 8 data bits */
1428 outb(0x13, port
+ 4); /* loop back mode */
1429 for (i
= 0; i
< 16; i
++) {
1431 if ((n
& 0x61) == 0x60)
1436 outb(0x00, port
+ 4);
1439 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
1440 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
1441 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
1442 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
1443 #define EN_CCMD 0x000 /* Chip's command register */
1444 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
1445 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
1446 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
1447 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
1448 #define EN0_DCFG 0x00E /* Data configuration reg WR */
1449 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
1450 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
1451 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
1452 static int __init
mxser_read_register(int port
, unsigned short *regs
)
1454 int i
, k
, value
, id
;
1457 id
= mxser_program_mode(port
);
1460 for (i
= 0; i
< 14; i
++) {
1461 k
= (i
& 0x3F) | 0x180;
1462 for (j
= 0x100; j
> 0; j
>>= 1) {
1463 outb(CHIP_CS
, port
);
1465 outb(CHIP_CS
| CHIP_DO
, port
);
1466 outb(CHIP_CS
| CHIP_DO
| CHIP_SK
, port
); /* A? bit of read */
1468 outb(CHIP_CS
, port
);
1469 outb(CHIP_CS
| CHIP_SK
, port
); /* A? bit of read */
1474 for (k
= 0, j
= 0x8000; k
< 16; k
++, j
>>= 1) {
1475 outb(CHIP_CS
, port
);
1476 outb(CHIP_CS
| CHIP_SK
, port
);
1477 if (inb(port
) & CHIP_DI
)
1483 mxser_normal_mode(port
);
1487 static int mxser_ioctl_special(unsigned int cmd
, void __user
*argp
)
1489 struct mxser_port
*ip
;
1490 struct tty_port
*port
;
1491 struct tty_struct
*tty
;
1497 case MOXA_GET_MAJOR
:
1498 printk_ratelimited(KERN_WARNING
"mxser: '%s' uses deprecated ioctl "
1499 "%x (GET_MAJOR), fix your userspace\n",
1500 current
->comm
, cmd
);
1501 return put_user(ttymajor
, (int __user
*)argp
);
1503 case MOXA_CHKPORTENABLE
:
1505 for (i
= 0; i
< MXSER_BOARDS
; i
++)
1506 for (j
= 0; j
< MXSER_PORTS_PER_BOARD
; j
++)
1507 if (mxser_boards
[i
].ports
[j
].ioaddr
)
1509 return put_user(result
, (unsigned long __user
*)argp
);
1510 case MOXA_GETDATACOUNT
:
1511 /* The receive side is locked by port->slock but it isn't
1512 clear that an exact snapshot is worth copying here */
1513 if (copy_to_user(argp
, &mxvar_log
, sizeof(mxvar_log
)))
1516 case MOXA_GETMSTATUS
: {
1517 struct mxser_mstatus ms
, __user
*msu
= argp
;
1518 for (i
= 0; i
< MXSER_BOARDS
; i
++)
1519 for (j
= 0; j
< MXSER_PORTS_PER_BOARD
; j
++) {
1520 ip
= &mxser_boards
[i
].ports
[j
];
1522 memset(&ms
, 0, sizeof(ms
));
1524 mutex_lock(&port
->mutex
);
1528 tty
= tty_port_tty_get(port
);
1531 ms
.cflag
= ip
->normal_termios
.c_cflag
;
1533 ms
.cflag
= tty
->termios
.c_cflag
;
1535 spin_lock_irq(&ip
->slock
);
1536 status
= inb(ip
->ioaddr
+ UART_MSR
);
1537 spin_unlock_irq(&ip
->slock
);
1538 if (status
& UART_MSR_DCD
)
1540 if (status
& UART_MSR_DSR
)
1542 if (status
& UART_MSR_CTS
)
1545 mutex_unlock(&port
->mutex
);
1546 if (copy_to_user(msu
, &ms
, sizeof(ms
)))
1552 case MOXA_ASPP_MON_EXT
: {
1553 struct mxser_mon_ext
*me
; /* it's 2k, stack unfriendly */
1554 unsigned int cflag
, iflag
, p
;
1557 me
= kzalloc(sizeof(*me
), GFP_KERNEL
);
1561 for (i
= 0, p
= 0; i
< MXSER_BOARDS
; i
++) {
1562 for (j
= 0; j
< MXSER_PORTS_PER_BOARD
; j
++, p
++) {
1563 if (p
>= ARRAY_SIZE(me
->rx_cnt
)) {
1567 ip
= &mxser_boards
[i
].ports
[j
];
1570 mutex_lock(&port
->mutex
);
1572 mutex_unlock(&port
->mutex
);
1576 spin_lock_irq(&ip
->slock
);
1577 status
= mxser_get_msr(ip
->ioaddr
, 0, p
);
1579 if (status
& UART_MSR_TERI
)
1581 if (status
& UART_MSR_DDSR
)
1583 if (status
& UART_MSR_DDCD
)
1585 if (status
& UART_MSR_DCTS
)
1588 ip
->mon_data
.modem_status
= status
;
1589 me
->rx_cnt
[p
] = ip
->mon_data
.rxcnt
;
1590 me
->tx_cnt
[p
] = ip
->mon_data
.txcnt
;
1591 me
->up_rxcnt
[p
] = ip
->mon_data
.up_rxcnt
;
1592 me
->up_txcnt
[p
] = ip
->mon_data
.up_txcnt
;
1593 me
->modem_status
[p
] =
1594 ip
->mon_data
.modem_status
;
1595 spin_unlock_irq(&ip
->slock
);
1597 tty
= tty_port_tty_get(&ip
->port
);
1600 cflag
= ip
->normal_termios
.c_cflag
;
1601 iflag
= ip
->normal_termios
.c_iflag
;
1602 me
->baudrate
[p
] = tty_termios_baud_rate(&ip
->normal_termios
);
1604 cflag
= tty
->termios
.c_cflag
;
1605 iflag
= tty
->termios
.c_iflag
;
1606 me
->baudrate
[p
] = tty_get_baud_rate(tty
);
1610 me
->databits
[p
] = cflag
& CSIZE
;
1611 me
->stopbits
[p
] = cflag
& CSTOPB
;
1612 me
->parity
[p
] = cflag
& (PARENB
| PARODD
|
1615 if (cflag
& CRTSCTS
)
1616 me
->flowctrl
[p
] |= 0x03;
1618 if (iflag
& (IXON
| IXOFF
))
1619 me
->flowctrl
[p
] |= 0x0C;
1621 if (ip
->type
== PORT_16550A
)
1624 if (ip
->board
->chip_flag
== MOXA_MUST_MU860_HWID
) {
1625 opmode
= inb(ip
->opmode_ioaddr
)>>((p
% 4) * 2);
1626 opmode
&= OP_MODE_MASK
;
1628 opmode
= RS232_MODE
;
1630 me
->iftype
[p
] = opmode
;
1631 mutex_unlock(&port
->mutex
);
1634 if (copy_to_user(argp
, me
, sizeof(*me
)))
1640 return -ENOIOCTLCMD
;
1645 static int mxser_cflags_changed(struct mxser_port
*info
, unsigned long arg
,
1646 struct async_icount
*cprev
)
1648 struct async_icount cnow
;
1649 unsigned long flags
;
1652 spin_lock_irqsave(&info
->slock
, flags
);
1653 cnow
= info
->icount
; /* atomic copy */
1654 spin_unlock_irqrestore(&info
->slock
, flags
);
1656 ret
= ((arg
& TIOCM_RNG
) && (cnow
.rng
!= cprev
->rng
)) ||
1657 ((arg
& TIOCM_DSR
) && (cnow
.dsr
!= cprev
->dsr
)) ||
1658 ((arg
& TIOCM_CD
) && (cnow
.dcd
!= cprev
->dcd
)) ||
1659 ((arg
& TIOCM_CTS
) && (cnow
.cts
!= cprev
->cts
));
1666 static int mxser_ioctl(struct tty_struct
*tty
,
1667 unsigned int cmd
, unsigned long arg
)
1669 struct mxser_port
*info
= tty
->driver_data
;
1670 struct tty_port
*port
= &info
->port
;
1671 struct async_icount cnow
;
1672 unsigned long flags
;
1673 void __user
*argp
= (void __user
*)arg
;
1676 if (tty
->index
== MXSER_PORTS
)
1677 return mxser_ioctl_special(cmd
, argp
);
1679 if (cmd
== MOXA_SET_OP_MODE
|| cmd
== MOXA_GET_OP_MODE
) {
1681 unsigned long opmode
;
1682 static unsigned char ModeMask
[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1684 unsigned char val
, mask
;
1686 if (info
->board
->chip_flag
!= MOXA_MUST_MU860_HWID
)
1690 if (cmd
== MOXA_SET_OP_MODE
) {
1691 if (get_user(opmode
, (int __user
*) argp
))
1693 if (opmode
!= RS232_MODE
&&
1694 opmode
!= RS485_2WIRE_MODE
&&
1695 opmode
!= RS422_MODE
&&
1696 opmode
!= RS485_4WIRE_MODE
)
1700 spin_lock_irq(&info
->slock
);
1701 val
= inb(info
->opmode_ioaddr
);
1703 val
|= (opmode
<< shiftbit
);
1704 outb(val
, info
->opmode_ioaddr
);
1705 spin_unlock_irq(&info
->slock
);
1708 spin_lock_irq(&info
->slock
);
1709 opmode
= inb(info
->opmode_ioaddr
) >> shiftbit
;
1710 spin_unlock_irq(&info
->slock
);
1711 opmode
&= OP_MODE_MASK
;
1712 if (put_user(opmode
, (int __user
*)argp
))
1718 if (cmd
!= TIOCGSERIAL
&& cmd
!= TIOCMIWAIT
&& tty_io_error(tty
))
1723 mutex_lock(&port
->mutex
);
1724 retval
= mxser_get_serial_info(tty
, argp
);
1725 mutex_unlock(&port
->mutex
);
1728 mutex_lock(&port
->mutex
);
1729 retval
= mxser_set_serial_info(tty
, argp
);
1730 mutex_unlock(&port
->mutex
);
1732 case TIOCSERGETLSR
: /* Get line status register */
1733 return mxser_get_lsr_info(info
, argp
);
1735 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1736 * - mask passed in arg for lines of interest
1737 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1738 * Caller should use TIOCGICOUNT to see which one it was
1741 spin_lock_irqsave(&info
->slock
, flags
);
1742 cnow
= info
->icount
; /* note the counters on entry */
1743 spin_unlock_irqrestore(&info
->slock
, flags
);
1745 return wait_event_interruptible(info
->port
.delta_msr_wait
,
1746 mxser_cflags_changed(info
, arg
, &cnow
));
1747 case MOXA_HighSpeedOn
:
1748 return put_user(info
->baud_base
!= 115200 ? 1 : 0, (int __user
*)argp
);
1749 case MOXA_SDS_RSTICOUNTER
:
1750 spin_lock_irq(&info
->slock
);
1751 info
->mon_data
.rxcnt
= 0;
1752 info
->mon_data
.txcnt
= 0;
1753 spin_unlock_irq(&info
->slock
);
1756 case MOXA_ASPP_OQUEUE
:{
1759 len
= mxser_chars_in_buffer(tty
);
1760 spin_lock_irq(&info
->slock
);
1761 lsr
= inb(info
->ioaddr
+ UART_LSR
) & UART_LSR_THRE
;
1762 spin_unlock_irq(&info
->slock
);
1763 len
+= (lsr
? 0 : 1);
1765 return put_user(len
, (int __user
*)argp
);
1767 case MOXA_ASPP_MON
: {
1770 spin_lock_irq(&info
->slock
);
1771 status
= mxser_get_msr(info
->ioaddr
, 1, tty
->index
);
1772 mxser_check_modem_status(tty
, info
, status
);
1774 mcr
= inb(info
->ioaddr
+ UART_MCR
);
1775 spin_unlock_irq(&info
->slock
);
1777 if (mcr
& MOXA_MUST_MCR_XON_FLAG
)
1778 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_XOFFHOLD
;
1780 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_XOFFHOLD
;
1782 if (mcr
& MOXA_MUST_MCR_TX_XON
)
1783 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_XOFFXENT
;
1785 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_XOFFXENT
;
1787 if (tty
->hw_stopped
)
1788 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_CTSHOLD
;
1790 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_CTSHOLD
;
1792 if (copy_to_user(argp
, &info
->mon_data
,
1793 sizeof(struct mxser_mon
)))
1798 case MOXA_ASPP_LSTATUS
: {
1799 if (put_user(info
->err_shadow
, (unsigned char __user
*)argp
))
1802 info
->err_shadow
= 0;
1805 case MOXA_SET_BAUD_METHOD
: {
1808 if (get_user(method
, (int __user
*)argp
))
1810 mxser_set_baud_method
[tty
->index
] = method
;
1811 return put_user(method
, (int __user
*)argp
);
1814 return -ENOIOCTLCMD
;
1820 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1821 * Return: write counters to the user passed counter struct
1822 * NB: both 1->0 and 0->1 transitions are counted except for
1823 * RI where only 0->1 is counted.
1826 static int mxser_get_icount(struct tty_struct
*tty
,
1827 struct serial_icounter_struct
*icount
)
1830 struct mxser_port
*info
= tty
->driver_data
;
1831 struct async_icount cnow
;
1832 unsigned long flags
;
1834 spin_lock_irqsave(&info
->slock
, flags
);
1835 cnow
= info
->icount
;
1836 spin_unlock_irqrestore(&info
->slock
, flags
);
1838 icount
->frame
= cnow
.frame
;
1839 icount
->brk
= cnow
.brk
;
1840 icount
->overrun
= cnow
.overrun
;
1841 icount
->buf_overrun
= cnow
.buf_overrun
;
1842 icount
->parity
= cnow
.parity
;
1843 icount
->rx
= cnow
.rx
;
1844 icount
->tx
= cnow
.tx
;
1845 icount
->cts
= cnow
.cts
;
1846 icount
->dsr
= cnow
.dsr
;
1847 icount
->rng
= cnow
.rng
;
1848 icount
->dcd
= cnow
.dcd
;
1852 static void mxser_stoprx(struct tty_struct
*tty
)
1854 struct mxser_port
*info
= tty
->driver_data
;
1856 info
->ldisc_stop_rx
= 1;
1858 if (info
->board
->chip_flag
) {
1859 info
->IER
&= ~MOXA_MUST_RECV_ISR
;
1860 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1862 info
->x_char
= STOP_CHAR(tty
);
1863 outb(0, info
->ioaddr
+ UART_IER
);
1864 info
->IER
|= UART_IER_THRI
;
1865 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1869 if (C_CRTSCTS(tty
)) {
1870 info
->MCR
&= ~UART_MCR_RTS
;
1871 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
1876 * This routine is called by the upper-layer tty layer to signal that
1877 * incoming characters should be throttled.
1879 static void mxser_throttle(struct tty_struct
*tty
)
1884 static void mxser_unthrottle(struct tty_struct
*tty
)
1886 struct mxser_port
*info
= tty
->driver_data
;
1889 info
->ldisc_stop_rx
= 0;
1894 if (info
->board
->chip_flag
) {
1895 info
->IER
|= MOXA_MUST_RECV_ISR
;
1896 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1898 info
->x_char
= START_CHAR(tty
);
1899 outb(0, info
->ioaddr
+ UART_IER
);
1900 info
->IER
|= UART_IER_THRI
;
1901 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1906 if (C_CRTSCTS(tty
)) {
1907 info
->MCR
|= UART_MCR_RTS
;
1908 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
1913 * mxser_stop() and mxser_start()
1915 * This routines are called before setting or resetting tty->stopped.
1916 * They enable or disable transmitter interrupts, as necessary.
1918 static void mxser_stop(struct tty_struct
*tty
)
1920 struct mxser_port
*info
= tty
->driver_data
;
1921 unsigned long flags
;
1923 spin_lock_irqsave(&info
->slock
, flags
);
1924 if (info
->IER
& UART_IER_THRI
) {
1925 info
->IER
&= ~UART_IER_THRI
;
1926 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1928 spin_unlock_irqrestore(&info
->slock
, flags
);
1931 static void mxser_start(struct tty_struct
*tty
)
1933 struct mxser_port
*info
= tty
->driver_data
;
1934 unsigned long flags
;
1936 spin_lock_irqsave(&info
->slock
, flags
);
1937 if (info
->xmit_cnt
&& info
->port
.xmit_buf
) {
1938 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
1939 info
->IER
|= UART_IER_THRI
;
1940 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1942 spin_unlock_irqrestore(&info
->slock
, flags
);
1945 static void mxser_set_termios(struct tty_struct
*tty
, struct ktermios
*old_termios
)
1947 struct mxser_port
*info
= tty
->driver_data
;
1948 unsigned long flags
;
1950 spin_lock_irqsave(&info
->slock
, flags
);
1951 mxser_change_speed(tty
, old_termios
);
1952 spin_unlock_irqrestore(&info
->slock
, flags
);
1954 if ((old_termios
->c_cflag
& CRTSCTS
) && !C_CRTSCTS(tty
)) {
1955 tty
->hw_stopped
= 0;
1959 /* Handle sw stopped */
1960 if ((old_termios
->c_iflag
& IXON
) && !I_IXON(tty
)) {
1963 if (info
->board
->chip_flag
) {
1964 spin_lock_irqsave(&info
->slock
, flags
);
1965 mxser_disable_must_rx_software_flow_control(
1967 spin_unlock_irqrestore(&info
->slock
, flags
);
1975 * mxser_wait_until_sent() --- wait until the transmitter is empty
1977 static void mxser_wait_until_sent(struct tty_struct
*tty
, int timeout
)
1979 struct mxser_port
*info
= tty
->driver_data
;
1980 unsigned long orig_jiffies
, char_time
;
1981 unsigned long flags
;
1984 if (info
->type
== PORT_UNKNOWN
)
1987 if (info
->xmit_fifo_size
== 0)
1988 return; /* Just in case.... */
1990 orig_jiffies
= jiffies
;
1992 * Set the check interval to be 1/5 of the estimated time to
1993 * send a single character, and make it at least 1. The check
1994 * interval should also be less than the timeout.
1996 * Note: we have to use pretty tight timings here to satisfy
1999 char_time
= (info
->timeout
- HZ
/ 50) / info
->xmit_fifo_size
;
2000 char_time
= char_time
/ 5;
2003 if (timeout
&& timeout
< char_time
)
2004 char_time
= timeout
;
2006 * If the transmitter hasn't cleared in twice the approximate
2007 * amount of time to send the entire FIFO, it probably won't
2008 * ever clear. This assumes the UART isn't doing flow
2009 * control, which is currently the case. Hence, if it ever
2010 * takes longer than info->timeout, this is probably due to a
2011 * UART bug of some kind. So, we clamp the timeout parameter at
2014 if (!timeout
|| timeout
> 2 * info
->timeout
)
2015 timeout
= 2 * info
->timeout
;
2017 spin_lock_irqsave(&info
->slock
, flags
);
2018 while (!((lsr
= inb(info
->ioaddr
+ UART_LSR
)) & UART_LSR_TEMT
)) {
2019 spin_unlock_irqrestore(&info
->slock
, flags
);
2020 schedule_timeout_interruptible(char_time
);
2021 spin_lock_irqsave(&info
->slock
, flags
);
2022 if (signal_pending(current
))
2024 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2027 spin_unlock_irqrestore(&info
->slock
, flags
);
2028 set_current_state(TASK_RUNNING
);
2032 * This routine is called by tty_hangup() when a hangup is signaled.
2034 static void mxser_hangup(struct tty_struct
*tty
)
2036 struct mxser_port
*info
= tty
->driver_data
;
2038 mxser_flush_buffer(tty
);
2039 tty_port_hangup(&info
->port
);
2043 * mxser_rs_break() --- routine which turns the break handling on or off
2045 static int mxser_rs_break(struct tty_struct
*tty
, int break_state
)
2047 struct mxser_port
*info
= tty
->driver_data
;
2048 unsigned long flags
;
2050 spin_lock_irqsave(&info
->slock
, flags
);
2051 if (break_state
== -1)
2052 outb(inb(info
->ioaddr
+ UART_LCR
) | UART_LCR_SBC
,
2053 info
->ioaddr
+ UART_LCR
);
2055 outb(inb(info
->ioaddr
+ UART_LCR
) & ~UART_LCR_SBC
,
2056 info
->ioaddr
+ UART_LCR
);
2057 spin_unlock_irqrestore(&info
->slock
, flags
);
2061 static void mxser_receive_chars(struct tty_struct
*tty
,
2062 struct mxser_port
*port
, int *status
)
2064 unsigned char ch
, gdl
;
2070 recv_room
= tty
->receive_room
;
2071 if (recv_room
== 0 && !port
->ldisc_stop_rx
)
2073 if (port
->board
->chip_flag
!= MOXA_OTHER_UART
) {
2075 if (*status
& UART_LSR_SPECIAL
)
2077 if (port
->board
->chip_flag
== MOXA_MUST_MU860_HWID
&&
2078 (*status
& MOXA_MUST_LSR_RERR
))
2080 if (*status
& MOXA_MUST_LSR_RERR
)
2083 gdl
= inb(port
->ioaddr
+ MOXA_MUST_GDL_REGISTER
);
2085 if (port
->board
->chip_flag
== MOXA_MUST_MU150_HWID
)
2086 gdl
&= MOXA_MUST_GDL_MASK
;
2087 if (gdl
>= recv_room
) {
2088 if (!port
->ldisc_stop_rx
)
2092 ch
= inb(port
->ioaddr
+ UART_RX
);
2093 tty_insert_flip_char(&port
->port
, ch
, 0);
2104 ch
= inb(port
->ioaddr
+ UART_RX
);
2105 if (port
->board
->chip_flag
&& (*status
& UART_LSR_OE
))
2106 outb(0x23, port
->ioaddr
+ UART_FCR
);
2107 *status
&= port
->read_status_mask
;
2108 if (*status
& port
->ignore_status_mask
) {
2109 if (++ignored
> 100)
2113 if (*status
& UART_LSR_SPECIAL
) {
2114 if (*status
& UART_LSR_BI
) {
2118 if (port
->port
.flags
& ASYNC_SAK
)
2120 } else if (*status
& UART_LSR_PE
) {
2122 port
->icount
.parity
++;
2123 } else if (*status
& UART_LSR_FE
) {
2125 port
->icount
.frame
++;
2126 } else if (*status
& UART_LSR_OE
) {
2128 port
->icount
.overrun
++;
2132 tty_insert_flip_char(&port
->port
, ch
, flag
);
2134 if (cnt
>= recv_room
) {
2135 if (!port
->ldisc_stop_rx
)
2142 if (port
->board
->chip_flag
)
2145 *status
= inb(port
->ioaddr
+ UART_LSR
);
2146 } while (*status
& UART_LSR_DR
);
2149 mxvar_log
.rxcnt
[tty
->index
] += cnt
;
2150 port
->mon_data
.rxcnt
+= cnt
;
2151 port
->mon_data
.up_rxcnt
+= cnt
;
2154 * We are called from an interrupt context with &port->slock
2155 * being held. Drop it temporarily in order to prevent
2156 * recursive locking.
2158 spin_unlock(&port
->slock
);
2159 tty_flip_buffer_push(&port
->port
);
2160 spin_lock(&port
->slock
);
2163 static void mxser_transmit_chars(struct tty_struct
*tty
, struct mxser_port
*port
)
2168 outb(port
->x_char
, port
->ioaddr
+ UART_TX
);
2170 mxvar_log
.txcnt
[tty
->index
]++;
2171 port
->mon_data
.txcnt
++;
2172 port
->mon_data
.up_txcnt
++;
2177 if (port
->port
.xmit_buf
== NULL
)
2180 if (port
->xmit_cnt
<= 0 || tty
->stopped
||
2182 (port
->type
!= PORT_16550A
) &&
2183 (!port
->board
->chip_flag
))) {
2184 port
->IER
&= ~UART_IER_THRI
;
2185 outb(port
->IER
, port
->ioaddr
+ UART_IER
);
2189 cnt
= port
->xmit_cnt
;
2190 count
= port
->xmit_fifo_size
;
2192 outb(port
->port
.xmit_buf
[port
->xmit_tail
++],
2193 port
->ioaddr
+ UART_TX
);
2194 port
->xmit_tail
= port
->xmit_tail
& (SERIAL_XMIT_SIZE
- 1);
2195 if (--port
->xmit_cnt
<= 0)
2197 } while (--count
> 0);
2198 mxvar_log
.txcnt
[tty
->index
] += (cnt
- port
->xmit_cnt
);
2200 port
->mon_data
.txcnt
+= (cnt
- port
->xmit_cnt
);
2201 port
->mon_data
.up_txcnt
+= (cnt
- port
->xmit_cnt
);
2202 port
->icount
.tx
+= (cnt
- port
->xmit_cnt
);
2204 if (port
->xmit_cnt
< WAKEUP_CHARS
)
2207 if (port
->xmit_cnt
<= 0) {
2208 port
->IER
&= ~UART_IER_THRI
;
2209 outb(port
->IER
, port
->ioaddr
+ UART_IER
);
2214 * This is the serial driver's generic interrupt routine
2216 static irqreturn_t
mxser_interrupt(int irq
, void *dev_id
)
2219 struct mxser_board
*brd
= NULL
;
2220 struct mxser_port
*port
;
2221 int max
, irqbits
, bits
, msr
;
2222 unsigned int int_cnt
, pass_counter
= 0;
2223 int handled
= IRQ_NONE
;
2224 struct tty_struct
*tty
;
2226 for (i
= 0; i
< MXSER_BOARDS
; i
++)
2227 if (dev_id
== &mxser_boards
[i
]) {
2232 if (i
== MXSER_BOARDS
)
2236 max
= brd
->info
->nports
;
2237 while (pass_counter
++ < MXSER_ISR_PASS_LIMIT
) {
2238 irqbits
= inb(brd
->vector
) & brd
->vector_mask
;
2239 if (irqbits
== brd
->vector_mask
)
2242 handled
= IRQ_HANDLED
;
2243 for (i
= 0, bits
= 1; i
< max
; i
++, irqbits
|= bits
, bits
<<= 1) {
2244 if (irqbits
== brd
->vector_mask
)
2248 port
= &brd
->ports
[i
];
2251 spin_lock(&port
->slock
);
2253 iir
= inb(port
->ioaddr
+ UART_IIR
);
2254 if (iir
& UART_IIR_NO_INT
)
2256 iir
&= MOXA_MUST_IIR_MASK
;
2257 tty
= tty_port_tty_get(&port
->port
);
2258 if (!tty
|| port
->closing
||
2259 !(port
->port
.flags
& ASYNC_INITIALIZED
)) {
2260 status
= inb(port
->ioaddr
+ UART_LSR
);
2261 outb(0x27, port
->ioaddr
+ UART_FCR
);
2262 inb(port
->ioaddr
+ UART_MSR
);
2267 status
= inb(port
->ioaddr
+ UART_LSR
);
2269 if (status
& UART_LSR_PE
)
2270 port
->err_shadow
|= NPPI_NOTIFY_PARITY
;
2271 if (status
& UART_LSR_FE
)
2272 port
->err_shadow
|= NPPI_NOTIFY_FRAMING
;
2273 if (status
& UART_LSR_OE
)
2275 NPPI_NOTIFY_HW_OVERRUN
;
2276 if (status
& UART_LSR_BI
)
2277 port
->err_shadow
|= NPPI_NOTIFY_BREAK
;
2279 if (port
->board
->chip_flag
) {
2280 if (iir
== MOXA_MUST_IIR_GDA
||
2281 iir
== MOXA_MUST_IIR_RDA
||
2282 iir
== MOXA_MUST_IIR_RTO
||
2283 iir
== MOXA_MUST_IIR_LSR
)
2284 mxser_receive_chars(tty
, port
,
2288 status
&= port
->read_status_mask
;
2289 if (status
& UART_LSR_DR
)
2290 mxser_receive_chars(tty
, port
,
2293 msr
= inb(port
->ioaddr
+ UART_MSR
);
2294 if (msr
& UART_MSR_ANY_DELTA
)
2295 mxser_check_modem_status(tty
, port
, msr
);
2297 if (port
->board
->chip_flag
) {
2298 if (iir
== 0x02 && (status
&
2300 mxser_transmit_chars(tty
, port
);
2302 if (status
& UART_LSR_THRE
)
2303 mxser_transmit_chars(tty
, port
);
2306 } while (int_cnt
++ < MXSER_ISR_PASS_LIMIT
);
2307 spin_unlock(&port
->slock
);
2315 static const struct tty_operations mxser_ops
= {
2317 .close
= mxser_close
,
2318 .write
= mxser_write
,
2319 .put_char
= mxser_put_char
,
2320 .flush_chars
= mxser_flush_chars
,
2321 .write_room
= mxser_write_room
,
2322 .chars_in_buffer
= mxser_chars_in_buffer
,
2323 .flush_buffer
= mxser_flush_buffer
,
2324 .ioctl
= mxser_ioctl
,
2325 .throttle
= mxser_throttle
,
2326 .unthrottle
= mxser_unthrottle
,
2327 .set_termios
= mxser_set_termios
,
2329 .start
= mxser_start
,
2330 .hangup
= mxser_hangup
,
2331 .break_ctl
= mxser_rs_break
,
2332 .wait_until_sent
= mxser_wait_until_sent
,
2333 .tiocmget
= mxser_tiocmget
,
2334 .tiocmset
= mxser_tiocmset
,
2335 .get_icount
= mxser_get_icount
,
2338 static const struct tty_port_operations mxser_port_ops
= {
2339 .carrier_raised
= mxser_carrier_raised
,
2340 .dtr_rts
= mxser_dtr_rts
,
2341 .activate
= mxser_activate
,
2342 .shutdown
= mxser_shutdown_port
,
2346 * The MOXA Smartio/Industio serial driver boot-time initialization code!
2349 static bool allow_overlapping_vector
;
2350 module_param(allow_overlapping_vector
, bool, S_IRUGO
);
2351 MODULE_PARM_DESC(allow_overlapping_vector
, "whether we allow ISA cards to be configured such that vector overlabs IO ports (default=no)");
2353 static bool mxser_overlapping_vector(struct mxser_board
*brd
)
2355 return allow_overlapping_vector
&&
2356 brd
->vector
>= brd
->ports
[0].ioaddr
&&
2357 brd
->vector
< brd
->ports
[0].ioaddr
+ 8 * brd
->info
->nports
;
2360 static int mxser_request_vector(struct mxser_board
*brd
)
2362 if (mxser_overlapping_vector(brd
))
2364 return request_region(brd
->vector
, 1, "mxser(vector)") ? 0 : -EIO
;
2367 static void mxser_release_vector(struct mxser_board
*brd
)
2369 if (mxser_overlapping_vector(brd
))
2371 release_region(brd
->vector
, 1);
2374 static void mxser_release_ISA_res(struct mxser_board
*brd
)
2376 release_region(brd
->ports
[0].ioaddr
, 8 * brd
->info
->nports
);
2377 mxser_release_vector(brd
);
2380 static int mxser_initbrd(struct mxser_board
*brd
,
2381 struct pci_dev
*pdev
)
2383 struct mxser_port
*info
;
2387 printk(KERN_INFO
"mxser: max. baud rate = %d bps\n",
2388 brd
->ports
[0].max_baud
);
2390 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2391 info
= &brd
->ports
[i
];
2392 tty_port_init(&info
->port
);
2393 info
->port
.ops
= &mxser_port_ops
;
2396 info
->ldisc_stop_rx
= 0;
2398 /* Enhance mode enabled here */
2399 if (brd
->chip_flag
!= MOXA_OTHER_UART
)
2400 mxser_enable_must_enchance_mode(info
->ioaddr
);
2402 info
->port
.flags
= ASYNC_SHARE_IRQ
;
2403 info
->type
= brd
->uart_type
;
2405 process_txrx_fifo(info
);
2407 info
->custom_divisor
= info
->baud_base
* 16;
2408 info
->port
.close_delay
= 5 * HZ
/ 10;
2409 info
->port
.closing_wait
= 30 * HZ
;
2410 info
->normal_termios
= mxvar_sdriver
->init_termios
;
2411 memset(&info
->mon_data
, 0, sizeof(struct mxser_mon
));
2412 info
->err_shadow
= 0;
2413 spin_lock_init(&info
->slock
);
2415 /* before set INT ISR, disable all int */
2416 outb(inb(info
->ioaddr
+ UART_IER
) & 0xf0,
2417 info
->ioaddr
+ UART_IER
);
2420 retval
= request_irq(brd
->irq
, mxser_interrupt
, IRQF_SHARED
, "mxser",
2423 for (i
= 0; i
< brd
->info
->nports
; i
++)
2424 tty_port_destroy(&brd
->ports
[i
].port
);
2425 printk(KERN_ERR
"Board %s: Request irq failed, IRQ (%d) may "
2426 "conflict with another device.\n",
2427 brd
->info
->name
, brd
->irq
);
2433 static void mxser_board_remove(struct mxser_board
*brd
)
2437 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2438 tty_unregister_device(mxvar_sdriver
, brd
->idx
+ i
);
2439 tty_port_destroy(&brd
->ports
[i
].port
);
2441 free_irq(brd
->irq
, brd
);
2444 static int __init
mxser_get_ISA_conf(int cap
, struct mxser_board
*brd
)
2446 int id
, i
, bits
, ret
;
2447 unsigned short regs
[16], irq
;
2448 unsigned char scratch
, scratch2
;
2450 brd
->chip_flag
= MOXA_OTHER_UART
;
2452 id
= mxser_read_register(cap
, regs
);
2455 brd
->info
= &mxser_cards
[0];
2458 brd
->info
= &mxser_cards
[1];
2460 case CI104J_ASIC_ID
:
2461 brd
->info
= &mxser_cards
[2];
2464 brd
->info
= &mxser_cards
[5];
2467 brd
->info
= &mxser_cards
[6];
2470 brd
->info
= &mxser_cards
[7];
2477 /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2478 Flag-hack checks if configuration should be read as 2-port here. */
2479 if (brd
->info
->nports
== 2 || (brd
->info
->flags
& MXSER_HAS2
)) {
2480 irq
= regs
[9] & 0xF000;
2481 irq
= irq
| (irq
>> 4);
2482 if (irq
!= (regs
[9] & 0xFF00))
2483 goto err_irqconflict
;
2484 } else if (brd
->info
->nports
== 4) {
2485 irq
= regs
[9] & 0xF000;
2486 irq
= irq
| (irq
>> 4);
2487 irq
= irq
| (irq
>> 8);
2489 goto err_irqconflict
;
2490 } else if (brd
->info
->nports
== 8) {
2491 irq
= regs
[9] & 0xF000;
2492 irq
= irq
| (irq
>> 4);
2493 irq
= irq
| (irq
>> 8);
2494 if ((irq
!= regs
[9]) || (irq
!= regs
[10]))
2495 goto err_irqconflict
;
2499 printk(KERN_ERR
"mxser: interrupt number unset\n");
2502 brd
->irq
= ((int)(irq
& 0xF000) >> 12);
2503 for (i
= 0; i
< 8; i
++)
2504 brd
->ports
[i
].ioaddr
= (int) regs
[i
+ 1] & 0xFFF8;
2505 if ((regs
[12] & 0x80) == 0) {
2506 printk(KERN_ERR
"mxser: invalid interrupt vector\n");
2509 brd
->vector
= (int)regs
[11]; /* interrupt vector */
2511 brd
->vector_mask
= 0x00FF;
2513 brd
->vector_mask
= 0x000F;
2514 for (i
= 7, bits
= 0x0100; i
>= 0; i
--, bits
<<= 1) {
2515 if (regs
[12] & bits
) {
2516 brd
->ports
[i
].baud_base
= 921600;
2517 brd
->ports
[i
].max_baud
= 921600;
2519 brd
->ports
[i
].baud_base
= 115200;
2520 brd
->ports
[i
].max_baud
= 115200;
2523 scratch2
= inb(cap
+ UART_LCR
) & (~UART_LCR_DLAB
);
2524 outb(scratch2
| UART_LCR_DLAB
, cap
+ UART_LCR
);
2525 outb(0, cap
+ UART_EFR
); /* EFR is the same as FCR */
2526 outb(scratch2
, cap
+ UART_LCR
);
2527 outb(UART_FCR_ENABLE_FIFO
, cap
+ UART_FCR
);
2528 scratch
= inb(cap
+ UART_IIR
);
2531 brd
->uart_type
= PORT_16550A
;
2533 brd
->uart_type
= PORT_16450
;
2534 if (!request_region(brd
->ports
[0].ioaddr
, 8 * brd
->info
->nports
,
2536 printk(KERN_ERR
"mxser: can't request ports I/O region: "
2537 "0x%.8lx-0x%.8lx\n",
2538 brd
->ports
[0].ioaddr
, brd
->ports
[0].ioaddr
+
2539 8 * brd
->info
->nports
- 1);
2543 ret
= mxser_request_vector(brd
);
2545 release_region(brd
->ports
[0].ioaddr
, 8 * brd
->info
->nports
);
2546 printk(KERN_ERR
"mxser: can't request interrupt vector region: "
2547 "0x%.8lx-0x%.8lx\n",
2548 brd
->ports
[0].ioaddr
, brd
->ports
[0].ioaddr
+
2549 8 * brd
->info
->nports
- 1);
2552 return brd
->info
->nports
;
2555 printk(KERN_ERR
"mxser: invalid interrupt number\n");
2559 static int mxser_probe(struct pci_dev
*pdev
,
2560 const struct pci_device_id
*ent
)
2563 struct mxser_board
*brd
;
2565 unsigned long ioaddress
;
2566 struct device
*tty_dev
;
2567 int retval
= -EINVAL
;
2569 for (i
= 0; i
< MXSER_BOARDS
; i
++)
2570 if (mxser_boards
[i
].info
== NULL
)
2573 if (i
>= MXSER_BOARDS
) {
2574 dev_err(&pdev
->dev
, "too many boards found (maximum %d), board "
2575 "not configured\n", MXSER_BOARDS
);
2579 brd
= &mxser_boards
[i
];
2580 brd
->idx
= i
* MXSER_PORTS_PER_BOARD
;
2581 dev_info(&pdev
->dev
, "found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2582 mxser_cards
[ent
->driver_data
].name
,
2583 pdev
->bus
->number
, PCI_SLOT(pdev
->devfn
));
2585 retval
= pci_enable_device(pdev
);
2587 dev_err(&pdev
->dev
, "PCI enable failed\n");
2592 ioaddress
= pci_resource_start(pdev
, 2);
2593 retval
= pci_request_region(pdev
, 2, "mxser(IO)");
2597 brd
->info
= &mxser_cards
[ent
->driver_data
];
2598 for (i
= 0; i
< brd
->info
->nports
; i
++)
2599 brd
->ports
[i
].ioaddr
= ioaddress
+ 8 * i
;
2602 ioaddress
= pci_resource_start(pdev
, 3);
2603 retval
= pci_request_region(pdev
, 3, "mxser(vector)");
2606 brd
->vector
= ioaddress
;
2609 brd
->irq
= pdev
->irq
;
2611 brd
->chip_flag
= CheckIsMoxaMust(brd
->ports
[0].ioaddr
);
2612 brd
->uart_type
= PORT_16550A
;
2613 brd
->vector_mask
= 0;
2615 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2616 for (j
= 0; j
< UART_INFO_NUM
; j
++) {
2617 if (Gpci_uart_info
[j
].type
== brd
->chip_flag
) {
2618 brd
->ports
[i
].max_baud
=
2619 Gpci_uart_info
[j
].max_baud
;
2621 /* exception....CP-102 */
2622 if (brd
->info
->flags
& MXSER_HIGHBAUD
)
2623 brd
->ports
[i
].max_baud
= 921600;
2629 if (brd
->chip_flag
== MOXA_MUST_MU860_HWID
) {
2630 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2632 brd
->ports
[i
].opmode_ioaddr
= ioaddress
+ 4;
2634 brd
->ports
[i
].opmode_ioaddr
= ioaddress
+ 0x0c;
2636 outb(0, ioaddress
+ 4); /* default set to RS232 mode */
2637 outb(0, ioaddress
+ 0x0c); /* default set to RS232 mode */
2640 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2641 brd
->vector_mask
|= (1 << i
);
2642 brd
->ports
[i
].baud_base
= 921600;
2645 /* mxser_initbrd will hook ISR. */
2646 retval
= mxser_initbrd(brd
, pdev
);
2650 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2651 tty_dev
= tty_port_register_device(&brd
->ports
[i
].port
,
2652 mxvar_sdriver
, brd
->idx
+ i
, &pdev
->dev
);
2653 if (IS_ERR(tty_dev
)) {
2654 retval
= PTR_ERR(tty_dev
);
2656 tty_unregister_device(mxvar_sdriver
,
2662 pci_set_drvdata(pdev
, brd
);
2666 for (i
= 0; i
< brd
->info
->nports
; i
++)
2667 tty_port_destroy(&brd
->ports
[i
].port
);
2668 free_irq(brd
->irq
, brd
);
2670 pci_release_region(pdev
, 3);
2673 pci_release_region(pdev
, 2);
2675 pci_disable_device(pdev
);
2683 static void mxser_remove(struct pci_dev
*pdev
)
2686 struct mxser_board
*brd
= pci_get_drvdata(pdev
);
2688 mxser_board_remove(brd
);
2690 pci_release_region(pdev
, 2);
2691 pci_release_region(pdev
, 3);
2692 pci_disable_device(pdev
);
2697 static struct pci_driver mxser_driver
= {
2699 .id_table
= mxser_pcibrds
,
2700 .probe
= mxser_probe
,
2701 .remove
= mxser_remove
2704 static int __init
mxser_module_init(void)
2706 struct mxser_board
*brd
;
2707 struct device
*tty_dev
;
2708 unsigned int b
, i
, m
;
2711 mxvar_sdriver
= alloc_tty_driver(MXSER_PORTS
+ 1);
2715 printk(KERN_INFO
"MOXA Smartio/Industio family driver version %s\n",
2718 /* Initialize the tty_driver structure */
2719 mxvar_sdriver
->name
= "ttyMI";
2720 mxvar_sdriver
->major
= ttymajor
;
2721 mxvar_sdriver
->minor_start
= 0;
2722 mxvar_sdriver
->type
= TTY_DRIVER_TYPE_SERIAL
;
2723 mxvar_sdriver
->subtype
= SERIAL_TYPE_NORMAL
;
2724 mxvar_sdriver
->init_termios
= tty_std_termios
;
2725 mxvar_sdriver
->init_termios
.c_cflag
= B9600
|CS8
|CREAD
|HUPCL
|CLOCAL
;
2726 mxvar_sdriver
->flags
= TTY_DRIVER_REAL_RAW
|TTY_DRIVER_DYNAMIC_DEV
;
2727 tty_set_operations(mxvar_sdriver
, &mxser_ops
);
2729 retval
= tty_register_driver(mxvar_sdriver
);
2731 printk(KERN_ERR
"Couldn't install MOXA Smartio/Industio family "
2736 /* Start finding ISA boards here */
2737 for (m
= 0, b
= 0; b
< MXSER_BOARDS
; b
++) {
2741 brd
= &mxser_boards
[m
];
2742 retval
= mxser_get_ISA_conf(ioaddr
[b
], brd
);
2748 printk(KERN_INFO
"mxser: found MOXA %s board (CAP=0x%lx)\n",
2749 brd
->info
->name
, ioaddr
[b
]);
2751 /* mxser_initbrd will hook ISR. */
2752 if (mxser_initbrd(brd
, NULL
) < 0) {
2753 mxser_release_ISA_res(brd
);
2758 brd
->idx
= m
* MXSER_PORTS_PER_BOARD
;
2759 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2760 tty_dev
= tty_port_register_device(&brd
->ports
[i
].port
,
2761 mxvar_sdriver
, brd
->idx
+ i
, NULL
);
2762 if (IS_ERR(tty_dev
)) {
2764 tty_unregister_device(mxvar_sdriver
,
2766 for (i
= 0; i
< brd
->info
->nports
; i
++)
2767 tty_port_destroy(&brd
->ports
[i
].port
);
2768 free_irq(brd
->irq
, brd
);
2769 mxser_release_ISA_res(brd
);
2774 if (brd
->info
== NULL
)
2780 retval
= pci_register_driver(&mxser_driver
);
2782 printk(KERN_ERR
"mxser: can't register pci driver\n");
2786 } /* else: we have some ISA cards under control */
2791 tty_unregister_driver(mxvar_sdriver
);
2793 put_tty_driver(mxvar_sdriver
);
2797 static void __exit
mxser_module_exit(void)
2801 pci_unregister_driver(&mxser_driver
);
2803 for (i
= 0; i
< MXSER_BOARDS
; i
++) /* ISA remains */
2804 if (mxser_boards
[i
].info
!= NULL
)
2805 mxser_board_remove(&mxser_boards
[i
]);
2806 tty_unregister_driver(mxvar_sdriver
);
2807 put_tty_driver(mxvar_sdriver
);
2809 for (i
= 0; i
< MXSER_BOARDS
; i
++)
2810 if (mxser_boards
[i
].info
!= NULL
)
2811 mxser_release_ISA_res(&mxser_boards
[i
]);
2814 module_init(mxser_module_init
);
2815 module_exit(mxser_module_exit
);