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
;
258 struct ktermios normal_termios
;
260 struct mxser_mon mon_data
;
268 const struct mxser_cardinfo
*info
;
269 unsigned long vector
;
270 unsigned long vector_mask
;
275 struct mxser_port ports
[MXSER_PORTS_PER_BOARD
];
278 struct mxser_mstatus
{
286 static struct mxser_board mxser_boards
[MXSER_BOARDS
];
287 static struct tty_driver
*mxvar_sdriver
;
288 static struct mxser_log mxvar_log
;
289 static int mxser_set_baud_method
[MXSER_PORTS
+ 1];
291 static void mxser_enable_must_enchance_mode(unsigned long baseio
)
296 oldlcr
= inb(baseio
+ UART_LCR
);
297 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
299 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
300 efr
|= MOXA_MUST_EFR_EFRB_ENABLE
;
302 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
303 outb(oldlcr
, baseio
+ UART_LCR
);
307 static void mxser_disable_must_enchance_mode(unsigned long baseio
)
312 oldlcr
= inb(baseio
+ UART_LCR
);
313 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
315 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
316 efr
&= ~MOXA_MUST_EFR_EFRB_ENABLE
;
318 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
319 outb(oldlcr
, baseio
+ UART_LCR
);
323 static void mxser_set_must_xon1_value(unsigned long baseio
, u8 value
)
328 oldlcr
= inb(baseio
+ UART_LCR
);
329 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
331 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
332 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
333 efr
|= MOXA_MUST_EFR_BANK0
;
335 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
336 outb(value
, baseio
+ MOXA_MUST_XON1_REGISTER
);
337 outb(oldlcr
, baseio
+ UART_LCR
);
340 static void mxser_set_must_xoff1_value(unsigned long baseio
, u8 value
)
345 oldlcr
= inb(baseio
+ UART_LCR
);
346 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
348 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
349 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
350 efr
|= MOXA_MUST_EFR_BANK0
;
352 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
353 outb(value
, baseio
+ MOXA_MUST_XOFF1_REGISTER
);
354 outb(oldlcr
, baseio
+ UART_LCR
);
357 static void mxser_set_must_fifo_value(struct mxser_port
*info
)
362 oldlcr
= inb(info
->ioaddr
+ UART_LCR
);
363 outb(MOXA_MUST_ENTER_ENCHANCE
, info
->ioaddr
+ UART_LCR
);
365 efr
= inb(info
->ioaddr
+ MOXA_MUST_EFR_REGISTER
);
366 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
367 efr
|= MOXA_MUST_EFR_BANK1
;
369 outb(efr
, info
->ioaddr
+ MOXA_MUST_EFR_REGISTER
);
370 outb((u8
)info
->rx_high_water
, info
->ioaddr
+ MOXA_MUST_RBRTH_REGISTER
);
371 outb((u8
)info
->rx_trigger
, info
->ioaddr
+ MOXA_MUST_RBRTI_REGISTER
);
372 outb((u8
)info
->rx_low_water
, info
->ioaddr
+ MOXA_MUST_RBRTL_REGISTER
);
373 outb(oldlcr
, info
->ioaddr
+ UART_LCR
);
376 static void mxser_set_must_enum_value(unsigned long baseio
, u8 value
)
381 oldlcr
= inb(baseio
+ UART_LCR
);
382 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
384 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
385 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
386 efr
|= MOXA_MUST_EFR_BANK2
;
388 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
389 outb(value
, baseio
+ MOXA_MUST_ENUM_REGISTER
);
390 outb(oldlcr
, baseio
+ UART_LCR
);
394 static void mxser_get_must_hardware_id(unsigned long baseio
, u8
*pId
)
399 oldlcr
= inb(baseio
+ UART_LCR
);
400 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
402 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
403 efr
&= ~MOXA_MUST_EFR_BANK_MASK
;
404 efr
|= MOXA_MUST_EFR_BANK2
;
406 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
407 *pId
= inb(baseio
+ MOXA_MUST_HWID_REGISTER
);
408 outb(oldlcr
, baseio
+ UART_LCR
);
412 static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio
)
417 oldlcr
= inb(baseio
+ UART_LCR
);
418 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
420 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
421 efr
&= ~MOXA_MUST_EFR_SF_MASK
;
423 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
424 outb(oldlcr
, baseio
+ UART_LCR
);
427 static void mxser_enable_must_tx_software_flow_control(unsigned long baseio
)
432 oldlcr
= inb(baseio
+ UART_LCR
);
433 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
435 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
436 efr
&= ~MOXA_MUST_EFR_SF_TX_MASK
;
437 efr
|= MOXA_MUST_EFR_SF_TX1
;
439 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
440 outb(oldlcr
, baseio
+ UART_LCR
);
443 static void mxser_disable_must_tx_software_flow_control(unsigned long baseio
)
448 oldlcr
= inb(baseio
+ UART_LCR
);
449 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
451 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
452 efr
&= ~MOXA_MUST_EFR_SF_TX_MASK
;
454 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
455 outb(oldlcr
, baseio
+ UART_LCR
);
458 static void mxser_enable_must_rx_software_flow_control(unsigned long baseio
)
463 oldlcr
= inb(baseio
+ UART_LCR
);
464 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
466 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
467 efr
&= ~MOXA_MUST_EFR_SF_RX_MASK
;
468 efr
|= MOXA_MUST_EFR_SF_RX1
;
470 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
471 outb(oldlcr
, baseio
+ UART_LCR
);
474 static void mxser_disable_must_rx_software_flow_control(unsigned long baseio
)
479 oldlcr
= inb(baseio
+ UART_LCR
);
480 outb(MOXA_MUST_ENTER_ENCHANCE
, baseio
+ UART_LCR
);
482 efr
= inb(baseio
+ MOXA_MUST_EFR_REGISTER
);
483 efr
&= ~MOXA_MUST_EFR_SF_RX_MASK
;
485 outb(efr
, baseio
+ MOXA_MUST_EFR_REGISTER
);
486 outb(oldlcr
, baseio
+ UART_LCR
);
490 static int CheckIsMoxaMust(unsigned long io
)
495 outb(0, io
+ UART_LCR
);
496 mxser_disable_must_enchance_mode(io
);
497 oldmcr
= inb(io
+ UART_MCR
);
498 outb(0, io
+ UART_MCR
);
499 mxser_set_must_xon1_value(io
, 0x11);
500 if ((hwid
= inb(io
+ UART_MCR
)) != 0) {
501 outb(oldmcr
, io
+ UART_MCR
);
502 return MOXA_OTHER_UART
;
505 mxser_get_must_hardware_id(io
, &hwid
);
506 for (i
= 1; i
< UART_INFO_NUM
; i
++) { /* 0 = OTHER_UART */
507 if (hwid
== Gpci_uart_info
[i
].type
)
510 return MOXA_OTHER_UART
;
514 static void process_txrx_fifo(struct mxser_port
*info
)
518 if ((info
->type
== PORT_16450
) || (info
->type
== PORT_8250
)) {
519 info
->rx_trigger
= 1;
520 info
->rx_high_water
= 1;
521 info
->rx_low_water
= 1;
522 info
->xmit_fifo_size
= 1;
524 for (i
= 0; i
< UART_INFO_NUM
; i
++)
525 if (info
->board
->chip_flag
== Gpci_uart_info
[i
].type
) {
526 info
->rx_trigger
= Gpci_uart_info
[i
].rx_trigger
;
527 info
->rx_low_water
= Gpci_uart_info
[i
].rx_low_water
;
528 info
->rx_high_water
= Gpci_uart_info
[i
].rx_high_water
;
529 info
->xmit_fifo_size
= Gpci_uart_info
[i
].xmit_fifo_size
;
534 static unsigned char mxser_get_msr(int baseaddr
, int mode
, int port
)
536 static unsigned char mxser_msr
[MXSER_PORTS
+ 1];
537 unsigned char status
= 0;
539 status
= inb(baseaddr
+ UART_MSR
);
541 mxser_msr
[port
] &= 0x0F;
542 mxser_msr
[port
] |= status
;
543 status
= mxser_msr
[port
];
550 static int mxser_carrier_raised(struct tty_port
*port
)
552 struct mxser_port
*mp
= container_of(port
, struct mxser_port
, port
);
553 return (inb(mp
->ioaddr
+ UART_MSR
) & UART_MSR_DCD
)?1:0;
556 static void mxser_dtr_rts(struct tty_port
*port
, int on
)
558 struct mxser_port
*mp
= container_of(port
, struct mxser_port
, port
);
561 spin_lock_irqsave(&mp
->slock
, flags
);
563 outb(inb(mp
->ioaddr
+ UART_MCR
) |
564 UART_MCR_DTR
| UART_MCR_RTS
, mp
->ioaddr
+ UART_MCR
);
566 outb(inb(mp
->ioaddr
+ UART_MCR
)&~(UART_MCR_DTR
| UART_MCR_RTS
),
567 mp
->ioaddr
+ UART_MCR
);
568 spin_unlock_irqrestore(&mp
->slock
, flags
);
571 static int mxser_set_baud(struct tty_struct
*tty
, long newspd
)
573 struct mxser_port
*info
= tty
->driver_data
;
580 if (newspd
> info
->max_baud
)
584 quot
= 2 * info
->baud_base
/ 269;
585 tty_encode_baud_rate(tty
, 134, 134);
587 quot
= info
->baud_base
/ newspd
;
590 baud
= info
->baud_base
/quot
;
591 tty_encode_baud_rate(tty
, baud
, baud
);
596 info
->timeout
= ((info
->xmit_fifo_size
* HZ
* 10 * quot
) / info
->baud_base
);
597 info
->timeout
+= HZ
/ 50; /* Add .02 seconds of slop */
600 info
->MCR
|= UART_MCR_DTR
;
601 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
603 info
->MCR
&= ~UART_MCR_DTR
;
604 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
608 cval
= inb(info
->ioaddr
+ UART_LCR
);
610 outb(cval
| UART_LCR_DLAB
, info
->ioaddr
+ UART_LCR
); /* set DLAB */
612 outb(quot
& 0xff, info
->ioaddr
+ UART_DLL
); /* LS of divisor */
613 outb(quot
>> 8, info
->ioaddr
+ UART_DLM
); /* MS of divisor */
614 outb(cval
, info
->ioaddr
+ UART_LCR
); /* reset DLAB */
617 if (C_BAUD(tty
) == BOTHER
) {
618 quot
= info
->baud_base
% newspd
;
620 if (quot
% newspd
> newspd
/ 2) {
626 mxser_set_must_enum_value(info
->ioaddr
, quot
);
629 mxser_set_must_enum_value(info
->ioaddr
, 0);
635 * This routine is called to set the UART divisor registers to match
636 * the specified baud rate for a serial port.
638 static int mxser_change_speed(struct tty_struct
*tty
,
639 struct ktermios
*old_termios
)
641 struct mxser_port
*info
= tty
->driver_data
;
642 unsigned cflag
, cval
, fcr
;
644 unsigned char status
;
646 cflag
= tty
->termios
.c_cflag
;
650 if (mxser_set_baud_method
[tty
->index
] == 0)
651 mxser_set_baud(tty
, tty_get_baud_rate(tty
));
653 /* byte size and parity */
654 switch (cflag
& CSIZE
) {
669 break; /* too keep GCC shut... */
674 cval
|= UART_LCR_PARITY
;
675 if (!(cflag
& PARODD
))
676 cval
|= UART_LCR_EPAR
;
678 cval
|= UART_LCR_SPAR
;
680 if ((info
->type
== PORT_8250
) || (info
->type
== PORT_16450
)) {
681 if (info
->board
->chip_flag
) {
682 fcr
= UART_FCR_ENABLE_FIFO
;
683 fcr
|= MOXA_MUST_FCR_GDA_MODE_ENABLE
;
684 mxser_set_must_fifo_value(info
);
688 fcr
= UART_FCR_ENABLE_FIFO
;
689 if (info
->board
->chip_flag
) {
690 fcr
|= MOXA_MUST_FCR_GDA_MODE_ENABLE
;
691 mxser_set_must_fifo_value(info
);
693 switch (info
->rx_trigger
) {
695 fcr
|= UART_FCR_TRIGGER_1
;
698 fcr
|= UART_FCR_TRIGGER_4
;
701 fcr
|= UART_FCR_TRIGGER_8
;
704 fcr
|= UART_FCR_TRIGGER_14
;
710 /* CTS flow control flag and modem status interrupts */
711 info
->IER
&= ~UART_IER_MSI
;
712 info
->MCR
&= ~UART_MCR_AFE
;
713 if (cflag
& CRTSCTS
) {
714 info
->port
.flags
|= ASYNC_CTS_FLOW
;
715 info
->IER
|= UART_IER_MSI
;
716 if ((info
->type
== PORT_16550A
) || (info
->board
->chip_flag
)) {
717 info
->MCR
|= UART_MCR_AFE
;
719 status
= inb(info
->ioaddr
+ UART_MSR
);
720 if (tty
->hw_stopped
) {
721 if (status
& UART_MSR_CTS
) {
723 if (info
->type
!= PORT_16550A
&&
724 !info
->board
->chip_flag
) {
725 outb(info
->IER
& ~UART_IER_THRI
,
728 info
->IER
|= UART_IER_THRI
;
729 outb(info
->IER
, info
->ioaddr
+
735 if (!(status
& UART_MSR_CTS
)) {
737 if ((info
->type
!= PORT_16550A
) &&
738 (!info
->board
->chip_flag
)) {
739 info
->IER
&= ~UART_IER_THRI
;
740 outb(info
->IER
, info
->ioaddr
+
747 info
->port
.flags
&= ~ASYNC_CTS_FLOW
;
749 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
750 if (cflag
& CLOCAL
) {
751 info
->port
.flags
&= ~ASYNC_CHECK_CD
;
753 info
->port
.flags
|= ASYNC_CHECK_CD
;
754 info
->IER
|= UART_IER_MSI
;
756 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
759 * Set up parity check flag
761 info
->read_status_mask
= UART_LSR_OE
| UART_LSR_THRE
| UART_LSR_DR
;
763 info
->read_status_mask
|= UART_LSR_FE
| UART_LSR_PE
;
764 if (I_BRKINT(tty
) || I_PARMRK(tty
))
765 info
->read_status_mask
|= UART_LSR_BI
;
767 info
->ignore_status_mask
= 0;
770 info
->ignore_status_mask
|= UART_LSR_BI
;
771 info
->read_status_mask
|= UART_LSR_BI
;
773 * If we're ignore parity and break indicators, ignore
774 * overruns too. (For real raw support).
777 info
->ignore_status_mask
|=
781 info
->read_status_mask
|=
787 if (info
->board
->chip_flag
) {
788 mxser_set_must_xon1_value(info
->ioaddr
, START_CHAR(tty
));
789 mxser_set_must_xoff1_value(info
->ioaddr
, STOP_CHAR(tty
));
791 mxser_enable_must_rx_software_flow_control(
794 mxser_disable_must_rx_software_flow_control(
798 mxser_enable_must_tx_software_flow_control(
801 mxser_disable_must_tx_software_flow_control(
807 outb(fcr
, info
->ioaddr
+ UART_FCR
); /* set fcr */
808 outb(cval
, info
->ioaddr
+ UART_LCR
);
813 static void mxser_check_modem_status(struct tty_struct
*tty
,
814 struct mxser_port
*port
, int status
)
816 /* update input line counters */
817 if (status
& UART_MSR_TERI
)
819 if (status
& UART_MSR_DDSR
)
821 if (status
& UART_MSR_DDCD
)
823 if (status
& UART_MSR_DCTS
)
825 port
->mon_data
.modem_status
= status
;
826 wake_up_interruptible(&port
->port
.delta_msr_wait
);
828 if ((port
->port
.flags
& ASYNC_CHECK_CD
) && (status
& UART_MSR_DDCD
)) {
829 if (status
& UART_MSR_DCD
)
830 wake_up_interruptible(&port
->port
.open_wait
);
833 if (tty_port_cts_enabled(&port
->port
)) {
834 if (tty
->hw_stopped
) {
835 if (status
& UART_MSR_CTS
) {
838 if ((port
->type
!= PORT_16550A
) &&
839 (!port
->board
->chip_flag
)) {
840 outb(port
->IER
& ~UART_IER_THRI
,
841 port
->ioaddr
+ UART_IER
);
842 port
->IER
|= UART_IER_THRI
;
843 outb(port
->IER
, port
->ioaddr
+
849 if (!(status
& UART_MSR_CTS
)) {
851 if (port
->type
!= PORT_16550A
&&
852 !port
->board
->chip_flag
) {
853 port
->IER
&= ~UART_IER_THRI
;
854 outb(port
->IER
, port
->ioaddr
+
862 static int mxser_activate(struct tty_port
*port
, struct tty_struct
*tty
)
864 struct mxser_port
*info
= container_of(port
, struct mxser_port
, port
);
868 page
= __get_free_page(GFP_KERNEL
);
872 spin_lock_irqsave(&info
->slock
, flags
);
874 if (!info
->ioaddr
|| !info
->type
) {
875 set_bit(TTY_IO_ERROR
, &tty
->flags
);
877 spin_unlock_irqrestore(&info
->slock
, flags
);
880 info
->port
.xmit_buf
= (unsigned char *) page
;
883 * Clear the FIFO buffers and disable them
884 * (they will be reenabled in mxser_change_speed())
886 if (info
->board
->chip_flag
)
887 outb((UART_FCR_CLEAR_RCVR
|
888 UART_FCR_CLEAR_XMIT
|
889 MOXA_MUST_FCR_GDA_MODE_ENABLE
), info
->ioaddr
+ UART_FCR
);
891 outb((UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
),
892 info
->ioaddr
+ UART_FCR
);
895 * At this point there's no way the LSR could still be 0xFF;
896 * if it is, then bail out, because there's likely no UART
899 if (inb(info
->ioaddr
+ UART_LSR
) == 0xff) {
900 spin_unlock_irqrestore(&info
->slock
, flags
);
901 if (capable(CAP_SYS_ADMIN
)) {
902 set_bit(TTY_IO_ERROR
, &tty
->flags
);
909 * Clear the interrupt registers.
911 (void) inb(info
->ioaddr
+ UART_LSR
);
912 (void) inb(info
->ioaddr
+ UART_RX
);
913 (void) inb(info
->ioaddr
+ UART_IIR
);
914 (void) inb(info
->ioaddr
+ UART_MSR
);
917 * Now, initialize the UART
919 outb(UART_LCR_WLEN8
, info
->ioaddr
+ UART_LCR
); /* reset DLAB */
920 info
->MCR
= UART_MCR_DTR
| UART_MCR_RTS
;
921 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
924 * Finally, enable interrupts
926 info
->IER
= UART_IER_MSI
| UART_IER_RLSI
| UART_IER_RDI
;
928 if (info
->board
->chip_flag
)
929 info
->IER
|= MOXA_MUST_IER_EGDAI
;
930 outb(info
->IER
, info
->ioaddr
+ UART_IER
); /* enable interrupts */
933 * And clear the interrupt registers again for luck.
935 (void) inb(info
->ioaddr
+ UART_LSR
);
936 (void) inb(info
->ioaddr
+ UART_RX
);
937 (void) inb(info
->ioaddr
+ UART_IIR
);
938 (void) inb(info
->ioaddr
+ UART_MSR
);
940 clear_bit(TTY_IO_ERROR
, &tty
->flags
);
941 info
->xmit_cnt
= info
->xmit_head
= info
->xmit_tail
= 0;
944 * and set the speed of the serial port
946 mxser_change_speed(tty
, NULL
);
947 spin_unlock_irqrestore(&info
->slock
, flags
);
953 * This routine will shutdown a serial port
955 static void mxser_shutdown_port(struct tty_port
*port
)
957 struct mxser_port
*info
= container_of(port
, struct mxser_port
, port
);
960 spin_lock_irqsave(&info
->slock
, flags
);
963 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
964 * here so the queue might never be waken up
966 wake_up_interruptible(&info
->port
.delta_msr_wait
);
969 * Free the xmit buffer, if necessary
971 if (info
->port
.xmit_buf
) {
972 free_page((unsigned long) info
->port
.xmit_buf
);
973 info
->port
.xmit_buf
= NULL
;
977 outb(0x00, info
->ioaddr
+ UART_IER
);
979 /* clear Rx/Tx FIFO's */
980 if (info
->board
->chip_flag
)
981 outb(UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
|
982 MOXA_MUST_FCR_GDA_MODE_ENABLE
,
983 info
->ioaddr
+ UART_FCR
);
985 outb(UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
,
986 info
->ioaddr
+ UART_FCR
);
988 /* read data port to reset things */
989 (void) inb(info
->ioaddr
+ UART_RX
);
992 if (info
->board
->chip_flag
)
993 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info
->ioaddr
);
995 spin_unlock_irqrestore(&info
->slock
, flags
);
999 * This routine is called whenever a serial port is opened. It
1000 * enables interrupts for a serial port, linking in its async structure into
1001 * the IRQ chain. It also performs the serial-specific
1002 * initialization for the tty structure.
1004 static int mxser_open(struct tty_struct
*tty
, struct file
*filp
)
1006 struct mxser_port
*info
;
1010 if (line
== MXSER_PORTS
)
1012 info
= &mxser_boards
[line
/ MXSER_PORTS_PER_BOARD
].ports
[line
% MXSER_PORTS_PER_BOARD
];
1016 tty
->driver_data
= info
;
1017 return tty_port_open(&info
->port
, tty
, filp
);
1020 static void mxser_flush_buffer(struct tty_struct
*tty
)
1022 struct mxser_port
*info
= tty
->driver_data
;
1024 unsigned long flags
;
1027 spin_lock_irqsave(&info
->slock
, flags
);
1028 info
->xmit_cnt
= info
->xmit_head
= info
->xmit_tail
= 0;
1030 fcr
= inb(info
->ioaddr
+ UART_FCR
);
1031 outb((fcr
| UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
),
1032 info
->ioaddr
+ UART_FCR
);
1033 outb(fcr
, info
->ioaddr
+ UART_FCR
);
1035 spin_unlock_irqrestore(&info
->slock
, flags
);
1041 static void mxser_close_port(struct tty_port
*port
)
1043 struct mxser_port
*info
= container_of(port
, struct mxser_port
, port
);
1044 unsigned long timeout
;
1046 * At this point we stop accepting input. To do this, we
1047 * disable the receive line status interrupts, and tell the
1048 * interrupt driver to stop checking the data ready bit in the
1049 * line status register.
1051 info
->IER
&= ~UART_IER_RLSI
;
1052 if (info
->board
->chip_flag
)
1053 info
->IER
&= ~MOXA_MUST_RECV_ISR
;
1055 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1057 * Before we drop DTR, make sure the UART transmitter
1058 * has completely drained; this is especially
1059 * important if there is a transmit FIFO!
1061 timeout
= jiffies
+ HZ
;
1062 while (!(inb(info
->ioaddr
+ UART_LSR
) & UART_LSR_TEMT
)) {
1063 schedule_timeout_interruptible(5);
1064 if (time_after(jiffies
, timeout
))
1070 * This routine is called when the serial port gets closed. First, we
1071 * wait for the last remaining data to be sent. Then, we unlink its
1072 * async structure from the interrupt chain if necessary, and we free
1073 * that IRQ if nothing is left in the chain.
1075 static void mxser_close(struct tty_struct
*tty
, struct file
*filp
)
1077 struct mxser_port
*info
= tty
->driver_data
;
1078 struct tty_port
*port
= &info
->port
;
1080 if (tty
->index
== MXSER_PORTS
|| info
== NULL
)
1082 if (tty_port_close_start(port
, tty
, filp
) == 0)
1084 mutex_lock(&port
->mutex
);
1085 mxser_close_port(port
);
1086 mxser_flush_buffer(tty
);
1087 if (test_bit(ASYNCB_INITIALIZED
, &port
->flags
)) {
1089 tty_port_lower_dtr_rts(port
);
1091 mxser_shutdown_port(port
);
1092 clear_bit(ASYNCB_INITIALIZED
, &port
->flags
);
1093 mutex_unlock(&port
->mutex
);
1094 /* Right now the tty_port set is done outside of the close_end helper
1095 as we don't yet have everyone using refcounts */
1096 tty_port_close_end(port
, tty
);
1097 tty_port_tty_set(port
, NULL
);
1100 static int mxser_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
1103 struct mxser_port
*info
= tty
->driver_data
;
1104 unsigned long flags
;
1106 if (!info
->port
.xmit_buf
)
1110 c
= min_t(int, count
, min(SERIAL_XMIT_SIZE
- info
->xmit_cnt
- 1,
1111 SERIAL_XMIT_SIZE
- info
->xmit_head
));
1115 memcpy(info
->port
.xmit_buf
+ info
->xmit_head
, buf
, c
);
1116 spin_lock_irqsave(&info
->slock
, flags
);
1117 info
->xmit_head
= (info
->xmit_head
+ c
) &
1118 (SERIAL_XMIT_SIZE
- 1);
1119 info
->xmit_cnt
+= c
;
1120 spin_unlock_irqrestore(&info
->slock
, flags
);
1127 if (info
->xmit_cnt
&& !tty
->stopped
) {
1128 if (!tty
->hw_stopped
||
1129 (info
->type
== PORT_16550A
) ||
1130 (info
->board
->chip_flag
)) {
1131 spin_lock_irqsave(&info
->slock
, flags
);
1132 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+
1134 info
->IER
|= UART_IER_THRI
;
1135 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1136 spin_unlock_irqrestore(&info
->slock
, flags
);
1142 static int mxser_put_char(struct tty_struct
*tty
, unsigned char ch
)
1144 struct mxser_port
*info
= tty
->driver_data
;
1145 unsigned long flags
;
1147 if (!info
->port
.xmit_buf
)
1150 if (info
->xmit_cnt
>= SERIAL_XMIT_SIZE
- 1)
1153 spin_lock_irqsave(&info
->slock
, flags
);
1154 info
->port
.xmit_buf
[info
->xmit_head
++] = ch
;
1155 info
->xmit_head
&= SERIAL_XMIT_SIZE
- 1;
1157 spin_unlock_irqrestore(&info
->slock
, flags
);
1158 if (!tty
->stopped
) {
1159 if (!tty
->hw_stopped
||
1160 (info
->type
== PORT_16550A
) ||
1161 info
->board
->chip_flag
) {
1162 spin_lock_irqsave(&info
->slock
, flags
);
1163 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
1164 info
->IER
|= UART_IER_THRI
;
1165 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1166 spin_unlock_irqrestore(&info
->slock
, flags
);
1173 static void mxser_flush_chars(struct tty_struct
*tty
)
1175 struct mxser_port
*info
= tty
->driver_data
;
1176 unsigned long flags
;
1178 if (info
->xmit_cnt
<= 0 || tty
->stopped
|| !info
->port
.xmit_buf
||
1179 (tty
->hw_stopped
&& info
->type
!= PORT_16550A
&&
1180 !info
->board
->chip_flag
))
1183 spin_lock_irqsave(&info
->slock
, flags
);
1185 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
1186 info
->IER
|= UART_IER_THRI
;
1187 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1189 spin_unlock_irqrestore(&info
->slock
, flags
);
1192 static int mxser_write_room(struct tty_struct
*tty
)
1194 struct mxser_port
*info
= tty
->driver_data
;
1197 ret
= SERIAL_XMIT_SIZE
- info
->xmit_cnt
- 1;
1198 return ret
< 0 ? 0 : ret
;
1201 static int mxser_chars_in_buffer(struct tty_struct
*tty
)
1203 struct mxser_port
*info
= tty
->driver_data
;
1204 return info
->xmit_cnt
;
1208 * ------------------------------------------------------------
1209 * friends of mxser_ioctl()
1210 * ------------------------------------------------------------
1212 static int mxser_get_serial_info(struct tty_struct
*tty
,
1213 struct serial_struct __user
*retinfo
)
1215 struct mxser_port
*info
= tty
->driver_data
;
1216 struct serial_struct tmp
= {
1219 .port
= info
->ioaddr
,
1220 .irq
= info
->board
->irq
,
1221 .flags
= info
->port
.flags
,
1222 .baud_base
= info
->baud_base
,
1223 .close_delay
= info
->port
.close_delay
,
1224 .closing_wait
= info
->port
.closing_wait
,
1225 .custom_divisor
= info
->custom_divisor
,
1228 if (copy_to_user(retinfo
, &tmp
, sizeof(*retinfo
)))
1233 static int mxser_set_serial_info(struct tty_struct
*tty
,
1234 struct serial_struct __user
*new_info
)
1236 struct mxser_port
*info
= tty
->driver_data
;
1237 struct tty_port
*port
= &info
->port
;
1238 struct serial_struct new_serial
;
1240 unsigned long sl_flags
;
1244 if (!new_info
|| !info
->ioaddr
)
1246 if (copy_from_user(&new_serial
, new_info
, sizeof(new_serial
)))
1249 if (new_serial
.irq
!= info
->board
->irq
||
1250 new_serial
.port
!= info
->ioaddr
)
1253 flags
= port
->flags
& ASYNC_SPD_MASK
;
1255 if (!capable(CAP_SYS_ADMIN
)) {
1256 if ((new_serial
.baud_base
!= info
->baud_base
) ||
1257 (new_serial
.close_delay
!= info
->port
.close_delay
) ||
1258 ((new_serial
.flags
& ~ASYNC_USR_MASK
) != (info
->port
.flags
& ~ASYNC_USR_MASK
)))
1260 info
->port
.flags
= ((info
->port
.flags
& ~ASYNC_USR_MASK
) |
1261 (new_serial
.flags
& ASYNC_USR_MASK
));
1264 * OK, past this point, all the error checking has been done.
1265 * At this point, we start making changes.....
1267 port
->flags
= ((port
->flags
& ~ASYNC_FLAGS
) |
1268 (new_serial
.flags
& ASYNC_FLAGS
));
1269 port
->close_delay
= new_serial
.close_delay
* HZ
/ 100;
1270 port
->closing_wait
= new_serial
.closing_wait
* HZ
/ 100;
1271 port
->low_latency
= (port
->flags
& ASYNC_LOW_LATENCY
) ? 1 : 0;
1272 if ((port
->flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_CUST
&&
1273 (new_serial
.baud_base
!= info
->baud_base
||
1274 new_serial
.custom_divisor
!=
1275 info
->custom_divisor
)) {
1276 if (new_serial
.custom_divisor
== 0)
1278 baud
= new_serial
.baud_base
/ new_serial
.custom_divisor
;
1279 tty_encode_baud_rate(tty
, baud
, baud
);
1283 info
->type
= new_serial
.type
;
1285 process_txrx_fifo(info
);
1287 if (test_bit(ASYNCB_INITIALIZED
, &port
->flags
)) {
1288 if (flags
!= (port
->flags
& ASYNC_SPD_MASK
)) {
1289 spin_lock_irqsave(&info
->slock
, sl_flags
);
1290 mxser_change_speed(tty
, NULL
);
1291 spin_unlock_irqrestore(&info
->slock
, sl_flags
);
1294 retval
= mxser_activate(port
, tty
);
1296 set_bit(ASYNCB_INITIALIZED
, &port
->flags
);
1302 * mxser_get_lsr_info - get line status register info
1304 * Purpose: Let user call ioctl() to get info when the UART physically
1305 * is emptied. On bus types like RS485, the transmitter must
1306 * release the bus after transmitting. This must be done when
1307 * the transmit shift register is empty, not be done when the
1308 * transmit holding register is empty. This functionality
1309 * allows an RS485 driver to be written in user space.
1311 static int mxser_get_lsr_info(struct mxser_port
*info
,
1312 unsigned int __user
*value
)
1314 unsigned char status
;
1315 unsigned int result
;
1316 unsigned long flags
;
1318 spin_lock_irqsave(&info
->slock
, flags
);
1319 status
= inb(info
->ioaddr
+ UART_LSR
);
1320 spin_unlock_irqrestore(&info
->slock
, flags
);
1321 result
= ((status
& UART_LSR_TEMT
) ? TIOCSER_TEMT
: 0);
1322 return put_user(result
, value
);
1325 static int mxser_tiocmget(struct tty_struct
*tty
)
1327 struct mxser_port
*info
= tty
->driver_data
;
1328 unsigned char control
, status
;
1329 unsigned long flags
;
1332 if (tty
->index
== MXSER_PORTS
)
1333 return -ENOIOCTLCMD
;
1334 if (test_bit(TTY_IO_ERROR
, &tty
->flags
))
1337 control
= info
->MCR
;
1339 spin_lock_irqsave(&info
->slock
, flags
);
1340 status
= inb(info
->ioaddr
+ UART_MSR
);
1341 if (status
& UART_MSR_ANY_DELTA
)
1342 mxser_check_modem_status(tty
, info
, status
);
1343 spin_unlock_irqrestore(&info
->slock
, flags
);
1344 return ((control
& UART_MCR_RTS
) ? TIOCM_RTS
: 0) |
1345 ((control
& UART_MCR_DTR
) ? TIOCM_DTR
: 0) |
1346 ((status
& UART_MSR_DCD
) ? TIOCM_CAR
: 0) |
1347 ((status
& UART_MSR_RI
) ? TIOCM_RNG
: 0) |
1348 ((status
& UART_MSR_DSR
) ? TIOCM_DSR
: 0) |
1349 ((status
& UART_MSR_CTS
) ? TIOCM_CTS
: 0);
1352 static int mxser_tiocmset(struct tty_struct
*tty
,
1353 unsigned int set
, unsigned int clear
)
1355 struct mxser_port
*info
= tty
->driver_data
;
1356 unsigned long flags
;
1359 if (tty
->index
== MXSER_PORTS
)
1360 return -ENOIOCTLCMD
;
1361 if (test_bit(TTY_IO_ERROR
, &tty
->flags
))
1364 spin_lock_irqsave(&info
->slock
, flags
);
1366 if (set
& TIOCM_RTS
)
1367 info
->MCR
|= UART_MCR_RTS
;
1368 if (set
& TIOCM_DTR
)
1369 info
->MCR
|= UART_MCR_DTR
;
1371 if (clear
& TIOCM_RTS
)
1372 info
->MCR
&= ~UART_MCR_RTS
;
1373 if (clear
& TIOCM_DTR
)
1374 info
->MCR
&= ~UART_MCR_DTR
;
1376 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
1377 spin_unlock_irqrestore(&info
->slock
, flags
);
1381 static int __init
mxser_program_mode(int port
)
1393 id
= inb(port
+ 1) & 0x1F;
1394 if ((id
!= C168_ASIC_ID
) &&
1395 (id
!= C104_ASIC_ID
) &&
1396 (id
!= C102_ASIC_ID
) &&
1397 (id
!= CI132_ASIC_ID
) &&
1398 (id
!= CI134_ASIC_ID
) &&
1399 (id
!= CI104J_ASIC_ID
))
1401 for (i
= 0, j
= 0; i
< 4; i
++) {
1405 } else if ((j
== 1) && (n
== 1)) {
1416 static void __init
mxser_normal_mode(int port
)
1420 outb(0xA5, port
+ 1);
1421 outb(0x80, port
+ 3);
1422 outb(12, port
+ 0); /* 9600 bps */
1424 outb(0x03, port
+ 3); /* 8 data bits */
1425 outb(0x13, port
+ 4); /* loop back mode */
1426 for (i
= 0; i
< 16; i
++) {
1428 if ((n
& 0x61) == 0x60)
1433 outb(0x00, port
+ 4);
1436 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
1437 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
1438 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
1439 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
1440 #define EN_CCMD 0x000 /* Chip's command register */
1441 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
1442 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
1443 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
1444 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
1445 #define EN0_DCFG 0x00E /* Data configuration reg WR */
1446 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
1447 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
1448 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
1449 static int __init
mxser_read_register(int port
, unsigned short *regs
)
1451 int i
, k
, value
, id
;
1454 id
= mxser_program_mode(port
);
1457 for (i
= 0; i
< 14; i
++) {
1458 k
= (i
& 0x3F) | 0x180;
1459 for (j
= 0x100; j
> 0; j
>>= 1) {
1460 outb(CHIP_CS
, port
);
1462 outb(CHIP_CS
| CHIP_DO
, port
);
1463 outb(CHIP_CS
| CHIP_DO
| CHIP_SK
, port
); /* A? bit of read */
1465 outb(CHIP_CS
, port
);
1466 outb(CHIP_CS
| CHIP_SK
, port
); /* A? bit of read */
1471 for (k
= 0, j
= 0x8000; k
< 16; k
++, j
>>= 1) {
1472 outb(CHIP_CS
, port
);
1473 outb(CHIP_CS
| CHIP_SK
, port
);
1474 if (inb(port
) & CHIP_DI
)
1480 mxser_normal_mode(port
);
1484 static int mxser_ioctl_special(unsigned int cmd
, void __user
*argp
)
1486 struct mxser_port
*ip
;
1487 struct tty_port
*port
;
1488 struct tty_struct
*tty
;
1494 case MOXA_GET_MAJOR
:
1495 printk_ratelimited(KERN_WARNING
"mxser: '%s' uses deprecated ioctl "
1496 "%x (GET_MAJOR), fix your userspace\n",
1497 current
->comm
, cmd
);
1498 return put_user(ttymajor
, (int __user
*)argp
);
1500 case MOXA_CHKPORTENABLE
:
1502 for (i
= 0; i
< MXSER_BOARDS
; i
++)
1503 for (j
= 0; j
< MXSER_PORTS_PER_BOARD
; j
++)
1504 if (mxser_boards
[i
].ports
[j
].ioaddr
)
1506 return put_user(result
, (unsigned long __user
*)argp
);
1507 case MOXA_GETDATACOUNT
:
1508 /* The receive side is locked by port->slock but it isn't
1509 clear that an exact snapshot is worth copying here */
1510 if (copy_to_user(argp
, &mxvar_log
, sizeof(mxvar_log
)))
1513 case MOXA_GETMSTATUS
: {
1514 struct mxser_mstatus ms
, __user
*msu
= argp
;
1515 for (i
= 0; i
< MXSER_BOARDS
; i
++)
1516 for (j
= 0; j
< MXSER_PORTS_PER_BOARD
; j
++) {
1517 ip
= &mxser_boards
[i
].ports
[j
];
1519 memset(&ms
, 0, sizeof(ms
));
1521 mutex_lock(&port
->mutex
);
1525 tty
= tty_port_tty_get(port
);
1528 ms
.cflag
= ip
->normal_termios
.c_cflag
;
1530 ms
.cflag
= tty
->termios
.c_cflag
;
1532 spin_lock_irq(&ip
->slock
);
1533 status
= inb(ip
->ioaddr
+ UART_MSR
);
1534 spin_unlock_irq(&ip
->slock
);
1535 if (status
& UART_MSR_DCD
)
1537 if (status
& UART_MSR_DSR
)
1539 if (status
& UART_MSR_CTS
)
1542 mutex_unlock(&port
->mutex
);
1543 if (copy_to_user(msu
, &ms
, sizeof(ms
)))
1549 case MOXA_ASPP_MON_EXT
: {
1550 struct mxser_mon_ext
*me
; /* it's 2k, stack unfriendly */
1551 unsigned int cflag
, iflag
, p
;
1554 me
= kzalloc(sizeof(*me
), GFP_KERNEL
);
1558 for (i
= 0, p
= 0; i
< MXSER_BOARDS
; i
++) {
1559 for (j
= 0; j
< MXSER_PORTS_PER_BOARD
; j
++, p
++) {
1560 if (p
>= ARRAY_SIZE(me
->rx_cnt
)) {
1564 ip
= &mxser_boards
[i
].ports
[j
];
1567 mutex_lock(&port
->mutex
);
1569 mutex_unlock(&port
->mutex
);
1573 spin_lock_irq(&ip
->slock
);
1574 status
= mxser_get_msr(ip
->ioaddr
, 0, p
);
1576 if (status
& UART_MSR_TERI
)
1578 if (status
& UART_MSR_DDSR
)
1580 if (status
& UART_MSR_DDCD
)
1582 if (status
& UART_MSR_DCTS
)
1585 ip
->mon_data
.modem_status
= status
;
1586 me
->rx_cnt
[p
] = ip
->mon_data
.rxcnt
;
1587 me
->tx_cnt
[p
] = ip
->mon_data
.txcnt
;
1588 me
->up_rxcnt
[p
] = ip
->mon_data
.up_rxcnt
;
1589 me
->up_txcnt
[p
] = ip
->mon_data
.up_txcnt
;
1590 me
->modem_status
[p
] =
1591 ip
->mon_data
.modem_status
;
1592 spin_unlock_irq(&ip
->slock
);
1594 tty
= tty_port_tty_get(&ip
->port
);
1597 cflag
= ip
->normal_termios
.c_cflag
;
1598 iflag
= ip
->normal_termios
.c_iflag
;
1599 me
->baudrate
[p
] = tty_termios_baud_rate(&ip
->normal_termios
);
1601 cflag
= tty
->termios
.c_cflag
;
1602 iflag
= tty
->termios
.c_iflag
;
1603 me
->baudrate
[p
] = tty_get_baud_rate(tty
);
1607 me
->databits
[p
] = cflag
& CSIZE
;
1608 me
->stopbits
[p
] = cflag
& CSTOPB
;
1609 me
->parity
[p
] = cflag
& (PARENB
| PARODD
|
1612 if (cflag
& CRTSCTS
)
1613 me
->flowctrl
[p
] |= 0x03;
1615 if (iflag
& (IXON
| IXOFF
))
1616 me
->flowctrl
[p
] |= 0x0C;
1618 if (ip
->type
== PORT_16550A
)
1621 opmode
= inb(ip
->opmode_ioaddr
)>>((p
% 4) * 2);
1622 opmode
&= OP_MODE_MASK
;
1623 me
->iftype
[p
] = opmode
;
1624 mutex_unlock(&port
->mutex
);
1627 if (copy_to_user(argp
, me
, sizeof(*me
)))
1633 return -ENOIOCTLCMD
;
1638 static int mxser_cflags_changed(struct mxser_port
*info
, unsigned long arg
,
1639 struct async_icount
*cprev
)
1641 struct async_icount cnow
;
1642 unsigned long flags
;
1645 spin_lock_irqsave(&info
->slock
, flags
);
1646 cnow
= info
->icount
; /* atomic copy */
1647 spin_unlock_irqrestore(&info
->slock
, flags
);
1649 ret
= ((arg
& TIOCM_RNG
) && (cnow
.rng
!= cprev
->rng
)) ||
1650 ((arg
& TIOCM_DSR
) && (cnow
.dsr
!= cprev
->dsr
)) ||
1651 ((arg
& TIOCM_CD
) && (cnow
.dcd
!= cprev
->dcd
)) ||
1652 ((arg
& TIOCM_CTS
) && (cnow
.cts
!= cprev
->cts
));
1659 static int mxser_ioctl(struct tty_struct
*tty
,
1660 unsigned int cmd
, unsigned long arg
)
1662 struct mxser_port
*info
= tty
->driver_data
;
1663 struct tty_port
*port
= &info
->port
;
1664 struct async_icount cnow
;
1665 unsigned long flags
;
1666 void __user
*argp
= (void __user
*)arg
;
1669 if (tty
->index
== MXSER_PORTS
)
1670 return mxser_ioctl_special(cmd
, argp
);
1672 if (cmd
== MOXA_SET_OP_MODE
|| cmd
== MOXA_GET_OP_MODE
) {
1674 unsigned long opmode
;
1675 static unsigned char ModeMask
[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1677 unsigned char val
, mask
;
1680 if (cmd
== MOXA_SET_OP_MODE
) {
1681 if (get_user(opmode
, (int __user
*) argp
))
1683 if (opmode
!= RS232_MODE
&&
1684 opmode
!= RS485_2WIRE_MODE
&&
1685 opmode
!= RS422_MODE
&&
1686 opmode
!= RS485_4WIRE_MODE
)
1690 spin_lock_irq(&info
->slock
);
1691 val
= inb(info
->opmode_ioaddr
);
1693 val
|= (opmode
<< shiftbit
);
1694 outb(val
, info
->opmode_ioaddr
);
1695 spin_unlock_irq(&info
->slock
);
1698 spin_lock_irq(&info
->slock
);
1699 opmode
= inb(info
->opmode_ioaddr
) >> shiftbit
;
1700 spin_unlock_irq(&info
->slock
);
1701 opmode
&= OP_MODE_MASK
;
1702 if (put_user(opmode
, (int __user
*)argp
))
1708 if (cmd
!= TIOCGSERIAL
&& cmd
!= TIOCMIWAIT
&&
1709 test_bit(TTY_IO_ERROR
, &tty
->flags
))
1714 mutex_lock(&port
->mutex
);
1715 retval
= mxser_get_serial_info(tty
, argp
);
1716 mutex_unlock(&port
->mutex
);
1719 mutex_lock(&port
->mutex
);
1720 retval
= mxser_set_serial_info(tty
, argp
);
1721 mutex_unlock(&port
->mutex
);
1723 case TIOCSERGETLSR
: /* Get line status register */
1724 return mxser_get_lsr_info(info
, argp
);
1726 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1727 * - mask passed in arg for lines of interest
1728 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1729 * Caller should use TIOCGICOUNT to see which one it was
1732 spin_lock_irqsave(&info
->slock
, flags
);
1733 cnow
= info
->icount
; /* note the counters on entry */
1734 spin_unlock_irqrestore(&info
->slock
, flags
);
1736 return wait_event_interruptible(info
->port
.delta_msr_wait
,
1737 mxser_cflags_changed(info
, arg
, &cnow
));
1738 case MOXA_HighSpeedOn
:
1739 return put_user(info
->baud_base
!= 115200 ? 1 : 0, (int __user
*)argp
);
1740 case MOXA_SDS_RSTICOUNTER
:
1741 spin_lock_irq(&info
->slock
);
1742 info
->mon_data
.rxcnt
= 0;
1743 info
->mon_data
.txcnt
= 0;
1744 spin_unlock_irq(&info
->slock
);
1747 case MOXA_ASPP_OQUEUE
:{
1750 len
= mxser_chars_in_buffer(tty
);
1751 spin_lock_irq(&info
->slock
);
1752 lsr
= inb(info
->ioaddr
+ UART_LSR
) & UART_LSR_THRE
;
1753 spin_unlock_irq(&info
->slock
);
1754 len
+= (lsr
? 0 : 1);
1756 return put_user(len
, (int __user
*)argp
);
1758 case MOXA_ASPP_MON
: {
1761 spin_lock_irq(&info
->slock
);
1762 status
= mxser_get_msr(info
->ioaddr
, 1, tty
->index
);
1763 mxser_check_modem_status(tty
, info
, status
);
1765 mcr
= inb(info
->ioaddr
+ UART_MCR
);
1766 spin_unlock_irq(&info
->slock
);
1768 if (mcr
& MOXA_MUST_MCR_XON_FLAG
)
1769 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_XOFFHOLD
;
1771 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_XOFFHOLD
;
1773 if (mcr
& MOXA_MUST_MCR_TX_XON
)
1774 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_XOFFXENT
;
1776 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_XOFFXENT
;
1778 if (tty
->hw_stopped
)
1779 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_CTSHOLD
;
1781 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_CTSHOLD
;
1783 if (copy_to_user(argp
, &info
->mon_data
,
1784 sizeof(struct mxser_mon
)))
1789 case MOXA_ASPP_LSTATUS
: {
1790 if (put_user(info
->err_shadow
, (unsigned char __user
*)argp
))
1793 info
->err_shadow
= 0;
1796 case MOXA_SET_BAUD_METHOD
: {
1799 if (get_user(method
, (int __user
*)argp
))
1801 mxser_set_baud_method
[tty
->index
] = method
;
1802 return put_user(method
, (int __user
*)argp
);
1805 return -ENOIOCTLCMD
;
1811 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1812 * Return: write counters to the user passed counter struct
1813 * NB: both 1->0 and 0->1 transitions are counted except for
1814 * RI where only 0->1 is counted.
1817 static int mxser_get_icount(struct tty_struct
*tty
,
1818 struct serial_icounter_struct
*icount
)
1821 struct mxser_port
*info
= tty
->driver_data
;
1822 struct async_icount cnow
;
1823 unsigned long flags
;
1825 spin_lock_irqsave(&info
->slock
, flags
);
1826 cnow
= info
->icount
;
1827 spin_unlock_irqrestore(&info
->slock
, flags
);
1829 icount
->frame
= cnow
.frame
;
1830 icount
->brk
= cnow
.brk
;
1831 icount
->overrun
= cnow
.overrun
;
1832 icount
->buf_overrun
= cnow
.buf_overrun
;
1833 icount
->parity
= cnow
.parity
;
1834 icount
->rx
= cnow
.rx
;
1835 icount
->tx
= cnow
.tx
;
1836 icount
->cts
= cnow
.cts
;
1837 icount
->dsr
= cnow
.dsr
;
1838 icount
->rng
= cnow
.rng
;
1839 icount
->dcd
= cnow
.dcd
;
1843 static void mxser_stoprx(struct tty_struct
*tty
)
1845 struct mxser_port
*info
= tty
->driver_data
;
1847 info
->ldisc_stop_rx
= 1;
1849 if (info
->board
->chip_flag
) {
1850 info
->IER
&= ~MOXA_MUST_RECV_ISR
;
1851 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1853 info
->x_char
= STOP_CHAR(tty
);
1854 outb(0, info
->ioaddr
+ UART_IER
);
1855 info
->IER
|= UART_IER_THRI
;
1856 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1860 if (tty
->termios
.c_cflag
& CRTSCTS
) {
1861 info
->MCR
&= ~UART_MCR_RTS
;
1862 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
1867 * This routine is called by the upper-layer tty layer to signal that
1868 * incoming characters should be throttled.
1870 static void mxser_throttle(struct tty_struct
*tty
)
1875 static void mxser_unthrottle(struct tty_struct
*tty
)
1877 struct mxser_port
*info
= tty
->driver_data
;
1880 info
->ldisc_stop_rx
= 0;
1885 if (info
->board
->chip_flag
) {
1886 info
->IER
|= MOXA_MUST_RECV_ISR
;
1887 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1889 info
->x_char
= START_CHAR(tty
);
1890 outb(0, info
->ioaddr
+ UART_IER
);
1891 info
->IER
|= UART_IER_THRI
;
1892 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1897 if (tty
->termios
.c_cflag
& CRTSCTS
) {
1898 info
->MCR
|= UART_MCR_RTS
;
1899 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
1904 * mxser_stop() and mxser_start()
1906 * This routines are called before setting or resetting tty->stopped.
1907 * They enable or disable transmitter interrupts, as necessary.
1909 static void mxser_stop(struct tty_struct
*tty
)
1911 struct mxser_port
*info
= tty
->driver_data
;
1912 unsigned long flags
;
1914 spin_lock_irqsave(&info
->slock
, flags
);
1915 if (info
->IER
& UART_IER_THRI
) {
1916 info
->IER
&= ~UART_IER_THRI
;
1917 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1919 spin_unlock_irqrestore(&info
->slock
, flags
);
1922 static void mxser_start(struct tty_struct
*tty
)
1924 struct mxser_port
*info
= tty
->driver_data
;
1925 unsigned long flags
;
1927 spin_lock_irqsave(&info
->slock
, flags
);
1928 if (info
->xmit_cnt
&& info
->port
.xmit_buf
) {
1929 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
1930 info
->IER
|= UART_IER_THRI
;
1931 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1933 spin_unlock_irqrestore(&info
->slock
, flags
);
1936 static void mxser_set_termios(struct tty_struct
*tty
, struct ktermios
*old_termios
)
1938 struct mxser_port
*info
= tty
->driver_data
;
1939 unsigned long flags
;
1941 spin_lock_irqsave(&info
->slock
, flags
);
1942 mxser_change_speed(tty
, old_termios
);
1943 spin_unlock_irqrestore(&info
->slock
, flags
);
1945 if ((old_termios
->c_cflag
& CRTSCTS
) &&
1946 !(tty
->termios
.c_cflag
& CRTSCTS
)) {
1947 tty
->hw_stopped
= 0;
1951 /* Handle sw stopped */
1952 if ((old_termios
->c_iflag
& IXON
) &&
1953 !(tty
->termios
.c_iflag
& IXON
)) {
1956 if (info
->board
->chip_flag
) {
1957 spin_lock_irqsave(&info
->slock
, flags
);
1958 mxser_disable_must_rx_software_flow_control(
1960 spin_unlock_irqrestore(&info
->slock
, flags
);
1968 * mxser_wait_until_sent() --- wait until the transmitter is empty
1970 static void mxser_wait_until_sent(struct tty_struct
*tty
, int timeout
)
1972 struct mxser_port
*info
= tty
->driver_data
;
1973 unsigned long orig_jiffies
, char_time
;
1974 unsigned long flags
;
1977 if (info
->type
== PORT_UNKNOWN
)
1980 if (info
->xmit_fifo_size
== 0)
1981 return; /* Just in case.... */
1983 orig_jiffies
= jiffies
;
1985 * Set the check interval to be 1/5 of the estimated time to
1986 * send a single character, and make it at least 1. The check
1987 * interval should also be less than the timeout.
1989 * Note: we have to use pretty tight timings here to satisfy
1992 char_time
= (info
->timeout
- HZ
/ 50) / info
->xmit_fifo_size
;
1993 char_time
= char_time
/ 5;
1996 if (timeout
&& timeout
< char_time
)
1997 char_time
= timeout
;
1999 * If the transmitter hasn't cleared in twice the approximate
2000 * amount of time to send the entire FIFO, it probably won't
2001 * ever clear. This assumes the UART isn't doing flow
2002 * control, which is currently the case. Hence, if it ever
2003 * takes longer than info->timeout, this is probably due to a
2004 * UART bug of some kind. So, we clamp the timeout parameter at
2007 if (!timeout
|| timeout
> 2 * info
->timeout
)
2008 timeout
= 2 * info
->timeout
;
2010 spin_lock_irqsave(&info
->slock
, flags
);
2011 while (!((lsr
= inb(info
->ioaddr
+ UART_LSR
)) & UART_LSR_TEMT
)) {
2012 spin_unlock_irqrestore(&info
->slock
, flags
);
2013 schedule_timeout_interruptible(char_time
);
2014 spin_lock_irqsave(&info
->slock
, flags
);
2015 if (signal_pending(current
))
2017 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2020 spin_unlock_irqrestore(&info
->slock
, flags
);
2021 set_current_state(TASK_RUNNING
);
2025 * This routine is called by tty_hangup() when a hangup is signaled.
2027 static void mxser_hangup(struct tty_struct
*tty
)
2029 struct mxser_port
*info
= tty
->driver_data
;
2031 mxser_flush_buffer(tty
);
2032 tty_port_hangup(&info
->port
);
2036 * mxser_rs_break() --- routine which turns the break handling on or off
2038 static int mxser_rs_break(struct tty_struct
*tty
, int break_state
)
2040 struct mxser_port
*info
= tty
->driver_data
;
2041 unsigned long flags
;
2043 spin_lock_irqsave(&info
->slock
, flags
);
2044 if (break_state
== -1)
2045 outb(inb(info
->ioaddr
+ UART_LCR
) | UART_LCR_SBC
,
2046 info
->ioaddr
+ UART_LCR
);
2048 outb(inb(info
->ioaddr
+ UART_LCR
) & ~UART_LCR_SBC
,
2049 info
->ioaddr
+ UART_LCR
);
2050 spin_unlock_irqrestore(&info
->slock
, flags
);
2054 static void mxser_receive_chars(struct tty_struct
*tty
,
2055 struct mxser_port
*port
, int *status
)
2057 unsigned char ch
, gdl
;
2063 recv_room
= tty
->receive_room
;
2064 if (recv_room
== 0 && !port
->ldisc_stop_rx
)
2066 if (port
->board
->chip_flag
!= MOXA_OTHER_UART
) {
2068 if (*status
& UART_LSR_SPECIAL
)
2070 if (port
->board
->chip_flag
== MOXA_MUST_MU860_HWID
&&
2071 (*status
& MOXA_MUST_LSR_RERR
))
2073 if (*status
& MOXA_MUST_LSR_RERR
)
2076 gdl
= inb(port
->ioaddr
+ MOXA_MUST_GDL_REGISTER
);
2078 if (port
->board
->chip_flag
== MOXA_MUST_MU150_HWID
)
2079 gdl
&= MOXA_MUST_GDL_MASK
;
2080 if (gdl
>= recv_room
) {
2081 if (!port
->ldisc_stop_rx
)
2085 ch
= inb(port
->ioaddr
+ UART_RX
);
2086 tty_insert_flip_char(&port
->port
, ch
, 0);
2097 ch
= inb(port
->ioaddr
+ UART_RX
);
2098 if (port
->board
->chip_flag
&& (*status
& UART_LSR_OE
))
2099 outb(0x23, port
->ioaddr
+ UART_FCR
);
2100 *status
&= port
->read_status_mask
;
2101 if (*status
& port
->ignore_status_mask
) {
2102 if (++ignored
> 100)
2106 if (*status
& UART_LSR_SPECIAL
) {
2107 if (*status
& UART_LSR_BI
) {
2111 if (port
->port
.flags
& ASYNC_SAK
)
2113 } else if (*status
& UART_LSR_PE
) {
2115 port
->icount
.parity
++;
2116 } else if (*status
& UART_LSR_FE
) {
2118 port
->icount
.frame
++;
2119 } else if (*status
& UART_LSR_OE
) {
2121 port
->icount
.overrun
++;
2125 tty_insert_flip_char(&port
->port
, ch
, flag
);
2127 if (cnt
>= recv_room
) {
2128 if (!port
->ldisc_stop_rx
)
2135 if (port
->board
->chip_flag
)
2138 *status
= inb(port
->ioaddr
+ UART_LSR
);
2139 } while (*status
& UART_LSR_DR
);
2142 mxvar_log
.rxcnt
[tty
->index
] += cnt
;
2143 port
->mon_data
.rxcnt
+= cnt
;
2144 port
->mon_data
.up_rxcnt
+= cnt
;
2147 * We are called from an interrupt context with &port->slock
2148 * being held. Drop it temporarily in order to prevent
2149 * recursive locking.
2151 spin_unlock(&port
->slock
);
2152 tty_flip_buffer_push(&port
->port
);
2153 spin_lock(&port
->slock
);
2156 static void mxser_transmit_chars(struct tty_struct
*tty
, struct mxser_port
*port
)
2161 outb(port
->x_char
, port
->ioaddr
+ UART_TX
);
2163 mxvar_log
.txcnt
[tty
->index
]++;
2164 port
->mon_data
.txcnt
++;
2165 port
->mon_data
.up_txcnt
++;
2170 if (port
->port
.xmit_buf
== NULL
)
2173 if (port
->xmit_cnt
<= 0 || tty
->stopped
||
2175 (port
->type
!= PORT_16550A
) &&
2176 (!port
->board
->chip_flag
))) {
2177 port
->IER
&= ~UART_IER_THRI
;
2178 outb(port
->IER
, port
->ioaddr
+ UART_IER
);
2182 cnt
= port
->xmit_cnt
;
2183 count
= port
->xmit_fifo_size
;
2185 outb(port
->port
.xmit_buf
[port
->xmit_tail
++],
2186 port
->ioaddr
+ UART_TX
);
2187 port
->xmit_tail
= port
->xmit_tail
& (SERIAL_XMIT_SIZE
- 1);
2188 if (--port
->xmit_cnt
<= 0)
2190 } while (--count
> 0);
2191 mxvar_log
.txcnt
[tty
->index
] += (cnt
- port
->xmit_cnt
);
2193 port
->mon_data
.txcnt
+= (cnt
- port
->xmit_cnt
);
2194 port
->mon_data
.up_txcnt
+= (cnt
- port
->xmit_cnt
);
2195 port
->icount
.tx
+= (cnt
- port
->xmit_cnt
);
2197 if (port
->xmit_cnt
< WAKEUP_CHARS
)
2200 if (port
->xmit_cnt
<= 0) {
2201 port
->IER
&= ~UART_IER_THRI
;
2202 outb(port
->IER
, port
->ioaddr
+ UART_IER
);
2207 * This is the serial driver's generic interrupt routine
2209 static irqreturn_t
mxser_interrupt(int irq
, void *dev_id
)
2212 struct mxser_board
*brd
= NULL
;
2213 struct mxser_port
*port
;
2214 int max
, irqbits
, bits
, msr
;
2215 unsigned int int_cnt
, pass_counter
= 0;
2216 int handled
= IRQ_NONE
;
2217 struct tty_struct
*tty
;
2219 for (i
= 0; i
< MXSER_BOARDS
; i
++)
2220 if (dev_id
== &mxser_boards
[i
]) {
2225 if (i
== MXSER_BOARDS
)
2229 max
= brd
->info
->nports
;
2230 while (pass_counter
++ < MXSER_ISR_PASS_LIMIT
) {
2231 irqbits
= inb(brd
->vector
) & brd
->vector_mask
;
2232 if (irqbits
== brd
->vector_mask
)
2235 handled
= IRQ_HANDLED
;
2236 for (i
= 0, bits
= 1; i
< max
; i
++, irqbits
|= bits
, bits
<<= 1) {
2237 if (irqbits
== brd
->vector_mask
)
2241 port
= &brd
->ports
[i
];
2244 spin_lock(&port
->slock
);
2246 iir
= inb(port
->ioaddr
+ UART_IIR
);
2247 if (iir
& UART_IIR_NO_INT
)
2249 iir
&= MOXA_MUST_IIR_MASK
;
2250 tty
= tty_port_tty_get(&port
->port
);
2252 (port
->port
.flags
& ASYNC_CLOSING
) ||
2253 !(port
->port
.flags
&
2254 ASYNC_INITIALIZED
)) {
2255 status
= inb(port
->ioaddr
+ UART_LSR
);
2256 outb(0x27, port
->ioaddr
+ UART_FCR
);
2257 inb(port
->ioaddr
+ UART_MSR
);
2262 status
= inb(port
->ioaddr
+ UART_LSR
);
2264 if (status
& UART_LSR_PE
)
2265 port
->err_shadow
|= NPPI_NOTIFY_PARITY
;
2266 if (status
& UART_LSR_FE
)
2267 port
->err_shadow
|= NPPI_NOTIFY_FRAMING
;
2268 if (status
& UART_LSR_OE
)
2270 NPPI_NOTIFY_HW_OVERRUN
;
2271 if (status
& UART_LSR_BI
)
2272 port
->err_shadow
|= NPPI_NOTIFY_BREAK
;
2274 if (port
->board
->chip_flag
) {
2275 if (iir
== MOXA_MUST_IIR_GDA
||
2276 iir
== MOXA_MUST_IIR_RDA
||
2277 iir
== MOXA_MUST_IIR_RTO
||
2278 iir
== MOXA_MUST_IIR_LSR
)
2279 mxser_receive_chars(tty
, port
,
2283 status
&= port
->read_status_mask
;
2284 if (status
& UART_LSR_DR
)
2285 mxser_receive_chars(tty
, port
,
2288 msr
= inb(port
->ioaddr
+ UART_MSR
);
2289 if (msr
& UART_MSR_ANY_DELTA
)
2290 mxser_check_modem_status(tty
, port
, msr
);
2292 if (port
->board
->chip_flag
) {
2293 if (iir
== 0x02 && (status
&
2295 mxser_transmit_chars(tty
, port
);
2297 if (status
& UART_LSR_THRE
)
2298 mxser_transmit_chars(tty
, port
);
2301 } while (int_cnt
++ < MXSER_ISR_PASS_LIMIT
);
2302 spin_unlock(&port
->slock
);
2310 static const struct tty_operations mxser_ops
= {
2312 .close
= mxser_close
,
2313 .write
= mxser_write
,
2314 .put_char
= mxser_put_char
,
2315 .flush_chars
= mxser_flush_chars
,
2316 .write_room
= mxser_write_room
,
2317 .chars_in_buffer
= mxser_chars_in_buffer
,
2318 .flush_buffer
= mxser_flush_buffer
,
2319 .ioctl
= mxser_ioctl
,
2320 .throttle
= mxser_throttle
,
2321 .unthrottle
= mxser_unthrottle
,
2322 .set_termios
= mxser_set_termios
,
2324 .start
= mxser_start
,
2325 .hangup
= mxser_hangup
,
2326 .break_ctl
= mxser_rs_break
,
2327 .wait_until_sent
= mxser_wait_until_sent
,
2328 .tiocmget
= mxser_tiocmget
,
2329 .tiocmset
= mxser_tiocmset
,
2330 .get_icount
= mxser_get_icount
,
2333 static struct tty_port_operations mxser_port_ops
= {
2334 .carrier_raised
= mxser_carrier_raised
,
2335 .dtr_rts
= mxser_dtr_rts
,
2336 .activate
= mxser_activate
,
2337 .shutdown
= mxser_shutdown_port
,
2341 * The MOXA Smartio/Industio serial driver boot-time initialization code!
2344 static bool allow_overlapping_vector
;
2345 module_param(allow_overlapping_vector
, bool, S_IRUGO
);
2346 MODULE_PARM_DESC(allow_overlapping_vector
, "whether we allow ISA cards to be configured such that vector overlabs IO ports (default=no)");
2348 static bool mxser_overlapping_vector(struct mxser_board
*brd
)
2350 return allow_overlapping_vector
&&
2351 brd
->vector
>= brd
->ports
[0].ioaddr
&&
2352 brd
->vector
< brd
->ports
[0].ioaddr
+ 8 * brd
->info
->nports
;
2355 static int mxser_request_vector(struct mxser_board
*brd
)
2357 if (mxser_overlapping_vector(brd
))
2359 return request_region(brd
->vector
, 1, "mxser(vector)") ? 0 : -EIO
;
2362 static void mxser_release_vector(struct mxser_board
*brd
)
2364 if (mxser_overlapping_vector(brd
))
2366 release_region(brd
->vector
, 1);
2369 static void mxser_release_ISA_res(struct mxser_board
*brd
)
2371 release_region(brd
->ports
[0].ioaddr
, 8 * brd
->info
->nports
);
2372 mxser_release_vector(brd
);
2375 static int mxser_initbrd(struct mxser_board
*brd
,
2376 struct pci_dev
*pdev
)
2378 struct mxser_port
*info
;
2382 printk(KERN_INFO
"mxser: max. baud rate = %d bps\n",
2383 brd
->ports
[0].max_baud
);
2385 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2386 info
= &brd
->ports
[i
];
2387 tty_port_init(&info
->port
);
2388 info
->port
.ops
= &mxser_port_ops
;
2391 info
->ldisc_stop_rx
= 0;
2393 /* Enhance mode enabled here */
2394 if (brd
->chip_flag
!= MOXA_OTHER_UART
)
2395 mxser_enable_must_enchance_mode(info
->ioaddr
);
2397 info
->port
.flags
= ASYNC_SHARE_IRQ
;
2398 info
->type
= brd
->uart_type
;
2400 process_txrx_fifo(info
);
2402 info
->custom_divisor
= info
->baud_base
* 16;
2403 info
->port
.close_delay
= 5 * HZ
/ 10;
2404 info
->port
.closing_wait
= 30 * HZ
;
2405 info
->normal_termios
= mxvar_sdriver
->init_termios
;
2406 memset(&info
->mon_data
, 0, sizeof(struct mxser_mon
));
2407 info
->err_shadow
= 0;
2408 spin_lock_init(&info
->slock
);
2410 /* before set INT ISR, disable all int */
2411 outb(inb(info
->ioaddr
+ UART_IER
) & 0xf0,
2412 info
->ioaddr
+ UART_IER
);
2415 retval
= request_irq(brd
->irq
, mxser_interrupt
, IRQF_SHARED
, "mxser",
2418 for (i
= 0; i
< brd
->info
->nports
; i
++)
2419 tty_port_destroy(&brd
->ports
[i
].port
);
2420 printk(KERN_ERR
"Board %s: Request irq failed, IRQ (%d) may "
2421 "conflict with another device.\n",
2422 brd
->info
->name
, brd
->irq
);
2428 static void mxser_board_remove(struct mxser_board
*brd
)
2432 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2433 tty_unregister_device(mxvar_sdriver
, brd
->idx
+ i
);
2434 tty_port_destroy(&brd
->ports
[i
].port
);
2436 free_irq(brd
->irq
, brd
);
2439 static int __init
mxser_get_ISA_conf(int cap
, struct mxser_board
*brd
)
2441 int id
, i
, bits
, ret
;
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);
2538 ret
= mxser_request_vector(brd
);
2540 release_region(brd
->ports
[0].ioaddr
, 8 * brd
->info
->nports
);
2541 printk(KERN_ERR
"mxser: can't request interrupt vector region: "
2542 "0x%.8lx-0x%.8lx\n",
2543 brd
->ports
[0].ioaddr
, brd
->ports
[0].ioaddr
+
2544 8 * brd
->info
->nports
- 1);
2547 return brd
->info
->nports
;
2550 printk(KERN_ERR
"mxser: invalid interrupt number\n");
2554 static int mxser_probe(struct pci_dev
*pdev
,
2555 const struct pci_device_id
*ent
)
2558 struct mxser_board
*brd
;
2560 unsigned long ioaddress
;
2561 struct device
*tty_dev
;
2562 int retval
= -EINVAL
;
2564 for (i
= 0; i
< MXSER_BOARDS
; i
++)
2565 if (mxser_boards
[i
].info
== NULL
)
2568 if (i
>= MXSER_BOARDS
) {
2569 dev_err(&pdev
->dev
, "too many boards found (maximum %d), board "
2570 "not configured\n", MXSER_BOARDS
);
2574 brd
= &mxser_boards
[i
];
2575 brd
->idx
= i
* MXSER_PORTS_PER_BOARD
;
2576 dev_info(&pdev
->dev
, "found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2577 mxser_cards
[ent
->driver_data
].name
,
2578 pdev
->bus
->number
, PCI_SLOT(pdev
->devfn
));
2580 retval
= pci_enable_device(pdev
);
2582 dev_err(&pdev
->dev
, "PCI enable failed\n");
2587 ioaddress
= pci_resource_start(pdev
, 2);
2588 retval
= pci_request_region(pdev
, 2, "mxser(IO)");
2592 brd
->info
= &mxser_cards
[ent
->driver_data
];
2593 for (i
= 0; i
< brd
->info
->nports
; i
++)
2594 brd
->ports
[i
].ioaddr
= ioaddress
+ 8 * i
;
2597 ioaddress
= pci_resource_start(pdev
, 3);
2598 retval
= pci_request_region(pdev
, 3, "mxser(vector)");
2601 brd
->vector
= ioaddress
;
2604 brd
->irq
= pdev
->irq
;
2606 brd
->chip_flag
= CheckIsMoxaMust(brd
->ports
[0].ioaddr
);
2607 brd
->uart_type
= PORT_16550A
;
2608 brd
->vector_mask
= 0;
2610 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2611 for (j
= 0; j
< UART_INFO_NUM
; j
++) {
2612 if (Gpci_uart_info
[j
].type
== brd
->chip_flag
) {
2613 brd
->ports
[i
].max_baud
=
2614 Gpci_uart_info
[j
].max_baud
;
2616 /* exception....CP-102 */
2617 if (brd
->info
->flags
& MXSER_HIGHBAUD
)
2618 brd
->ports
[i
].max_baud
= 921600;
2624 if (brd
->chip_flag
== MOXA_MUST_MU860_HWID
) {
2625 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2627 brd
->ports
[i
].opmode_ioaddr
= ioaddress
+ 4;
2629 brd
->ports
[i
].opmode_ioaddr
= ioaddress
+ 0x0c;
2631 outb(0, ioaddress
+ 4); /* default set to RS232 mode */
2632 outb(0, ioaddress
+ 0x0c); /* default set to RS232 mode */
2635 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2636 brd
->vector_mask
|= (1 << i
);
2637 brd
->ports
[i
].baud_base
= 921600;
2640 /* mxser_initbrd will hook ISR. */
2641 retval
= mxser_initbrd(brd
, pdev
);
2645 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2646 tty_dev
= tty_port_register_device(&brd
->ports
[i
].port
,
2647 mxvar_sdriver
, brd
->idx
+ i
, &pdev
->dev
);
2648 if (IS_ERR(tty_dev
)) {
2649 retval
= PTR_ERR(tty_dev
);
2651 tty_unregister_device(mxvar_sdriver
,
2657 pci_set_drvdata(pdev
, brd
);
2661 for (i
= 0; i
< brd
->info
->nports
; i
++)
2662 tty_port_destroy(&brd
->ports
[i
].port
);
2663 free_irq(brd
->irq
, brd
);
2665 pci_release_region(pdev
, 3);
2668 pci_release_region(pdev
, 2);
2670 pci_disable_device(pdev
);
2678 static void mxser_remove(struct pci_dev
*pdev
)
2681 struct mxser_board
*brd
= pci_get_drvdata(pdev
);
2683 mxser_board_remove(brd
);
2685 pci_release_region(pdev
, 2);
2686 pci_release_region(pdev
, 3);
2687 pci_disable_device(pdev
);
2692 static struct pci_driver mxser_driver
= {
2694 .id_table
= mxser_pcibrds
,
2695 .probe
= mxser_probe
,
2696 .remove
= mxser_remove
2699 static int __init
mxser_module_init(void)
2701 struct mxser_board
*brd
;
2702 struct device
*tty_dev
;
2703 unsigned int b
, i
, m
;
2706 mxvar_sdriver
= alloc_tty_driver(MXSER_PORTS
+ 1);
2710 printk(KERN_INFO
"MOXA Smartio/Industio family driver version %s\n",
2713 /* Initialize the tty_driver structure */
2714 mxvar_sdriver
->name
= "ttyMI";
2715 mxvar_sdriver
->major
= ttymajor
;
2716 mxvar_sdriver
->minor_start
= 0;
2717 mxvar_sdriver
->type
= TTY_DRIVER_TYPE_SERIAL
;
2718 mxvar_sdriver
->subtype
= SERIAL_TYPE_NORMAL
;
2719 mxvar_sdriver
->init_termios
= tty_std_termios
;
2720 mxvar_sdriver
->init_termios
.c_cflag
= B9600
|CS8
|CREAD
|HUPCL
|CLOCAL
;
2721 mxvar_sdriver
->flags
= TTY_DRIVER_REAL_RAW
|TTY_DRIVER_DYNAMIC_DEV
;
2722 tty_set_operations(mxvar_sdriver
, &mxser_ops
);
2724 retval
= tty_register_driver(mxvar_sdriver
);
2726 printk(KERN_ERR
"Couldn't install MOXA Smartio/Industio family "
2731 /* Start finding ISA boards here */
2732 for (m
= 0, b
= 0; b
< MXSER_BOARDS
; b
++) {
2736 brd
= &mxser_boards
[m
];
2737 retval
= mxser_get_ISA_conf(ioaddr
[b
], brd
);
2743 printk(KERN_INFO
"mxser: found MOXA %s board (CAP=0x%lx)\n",
2744 brd
->info
->name
, ioaddr
[b
]);
2746 /* mxser_initbrd will hook ISR. */
2747 if (mxser_initbrd(brd
, NULL
) < 0) {
2748 mxser_release_ISA_res(brd
);
2753 brd
->idx
= m
* MXSER_PORTS_PER_BOARD
;
2754 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2755 tty_dev
= tty_port_register_device(&brd
->ports
[i
].port
,
2756 mxvar_sdriver
, brd
->idx
+ i
, NULL
);
2757 if (IS_ERR(tty_dev
)) {
2759 tty_unregister_device(mxvar_sdriver
,
2761 for (i
= 0; i
< brd
->info
->nports
; i
++)
2762 tty_port_destroy(&brd
->ports
[i
].port
);
2763 free_irq(brd
->irq
, brd
);
2764 mxser_release_ISA_res(brd
);
2769 if (brd
->info
== NULL
)
2775 retval
= pci_register_driver(&mxser_driver
);
2777 printk(KERN_ERR
"mxser: can't register pci driver\n");
2781 } /* else: we have some ISA cards under control */
2786 tty_unregister_driver(mxvar_sdriver
);
2788 put_tty_driver(mxvar_sdriver
);
2792 static void __exit
mxser_module_exit(void)
2796 pci_unregister_driver(&mxser_driver
);
2798 for (i
= 0; i
< MXSER_BOARDS
; i
++) /* ISA remains */
2799 if (mxser_boards
[i
].info
!= NULL
)
2800 mxser_board_remove(&mxser_boards
[i
]);
2801 tty_unregister_driver(mxvar_sdriver
);
2802 put_tty_driver(mxvar_sdriver
);
2804 for (i
= 0; i
< MXSER_BOARDS
; i
++)
2805 if (mxser_boards
[i
].info
!= NULL
)
2806 mxser_release_ISA_res(&mxser_boards
[i
]);
2809 module_init(mxser_module_init
);
2810 module_exit(mxser_module_exit
);