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>
43 #include <asm/system.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 __devinit
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 (port
->port
.flags
& ASYNC_CTS_FLOW
) {
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 if (line
< 0 || line
> MXSER_PORTS
)
1014 info
= &mxser_boards
[line
/ MXSER_PORTS_PER_BOARD
].ports
[line
% MXSER_PORTS_PER_BOARD
];
1018 tty
->driver_data
= info
;
1019 return tty_port_open(&info
->port
, tty
, filp
);
1022 static void mxser_flush_buffer(struct tty_struct
*tty
)
1024 struct mxser_port
*info
= tty
->driver_data
;
1026 unsigned long flags
;
1029 spin_lock_irqsave(&info
->slock
, flags
);
1030 info
->xmit_cnt
= info
->xmit_head
= info
->xmit_tail
= 0;
1032 fcr
= inb(info
->ioaddr
+ UART_FCR
);
1033 outb((fcr
| UART_FCR_CLEAR_RCVR
| UART_FCR_CLEAR_XMIT
),
1034 info
->ioaddr
+ UART_FCR
);
1035 outb(fcr
, info
->ioaddr
+ UART_FCR
);
1037 spin_unlock_irqrestore(&info
->slock
, flags
);
1043 static void mxser_close_port(struct tty_port
*port
)
1045 struct mxser_port
*info
= container_of(port
, struct mxser_port
, port
);
1046 unsigned long timeout
;
1048 * At this point we stop accepting input. To do this, we
1049 * disable the receive line status interrupts, and tell the
1050 * interrupt driver to stop checking the data ready bit in the
1051 * line status register.
1053 info
->IER
&= ~UART_IER_RLSI
;
1054 if (info
->board
->chip_flag
)
1055 info
->IER
&= ~MOXA_MUST_RECV_ISR
;
1057 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1059 * Before we drop DTR, make sure the UART transmitter
1060 * has completely drained; this is especially
1061 * important if there is a transmit FIFO!
1063 timeout
= jiffies
+ HZ
;
1064 while (!(inb(info
->ioaddr
+ UART_LSR
) & UART_LSR_TEMT
)) {
1065 schedule_timeout_interruptible(5);
1066 if (time_after(jiffies
, timeout
))
1072 * This routine is called when the serial port gets closed. First, we
1073 * wait for the last remaining data to be sent. Then, we unlink its
1074 * async structure from the interrupt chain if necessary, and we free
1075 * that IRQ if nothing is left in the chain.
1077 static void mxser_close(struct tty_struct
*tty
, struct file
*filp
)
1079 struct mxser_port
*info
= tty
->driver_data
;
1080 struct tty_port
*port
= &info
->port
;
1082 if (tty
->index
== MXSER_PORTS
|| info
== NULL
)
1084 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 mxser_shutdown_port(port
);
1090 clear_bit(ASYNCB_INITIALIZED
, &port
->flags
);
1091 mutex_unlock(&port
->mutex
);
1092 /* Right now the tty_port set is done outside of the close_end helper
1093 as we don't yet have everyone using refcounts */
1094 tty_port_close_end(port
, tty
);
1095 tty_port_tty_set(port
, NULL
);
1098 static int mxser_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
1101 struct mxser_port
*info
= tty
->driver_data
;
1102 unsigned long flags
;
1104 if (!info
->port
.xmit_buf
)
1108 c
= min_t(int, count
, min(SERIAL_XMIT_SIZE
- info
->xmit_cnt
- 1,
1109 SERIAL_XMIT_SIZE
- info
->xmit_head
));
1113 memcpy(info
->port
.xmit_buf
+ info
->xmit_head
, buf
, c
);
1114 spin_lock_irqsave(&info
->slock
, flags
);
1115 info
->xmit_head
= (info
->xmit_head
+ c
) &
1116 (SERIAL_XMIT_SIZE
- 1);
1117 info
->xmit_cnt
+= c
;
1118 spin_unlock_irqrestore(&info
->slock
, flags
);
1125 if (info
->xmit_cnt
&& !tty
->stopped
) {
1126 if (!tty
->hw_stopped
||
1127 (info
->type
== PORT_16550A
) ||
1128 (info
->board
->chip_flag
)) {
1129 spin_lock_irqsave(&info
->slock
, flags
);
1130 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+
1132 info
->IER
|= UART_IER_THRI
;
1133 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1134 spin_unlock_irqrestore(&info
->slock
, flags
);
1140 static int mxser_put_char(struct tty_struct
*tty
, unsigned char ch
)
1142 struct mxser_port
*info
= tty
->driver_data
;
1143 unsigned long flags
;
1145 if (!info
->port
.xmit_buf
)
1148 if (info
->xmit_cnt
>= SERIAL_XMIT_SIZE
- 1)
1151 spin_lock_irqsave(&info
->slock
, flags
);
1152 info
->port
.xmit_buf
[info
->xmit_head
++] = ch
;
1153 info
->xmit_head
&= SERIAL_XMIT_SIZE
- 1;
1155 spin_unlock_irqrestore(&info
->slock
, flags
);
1156 if (!tty
->stopped
) {
1157 if (!tty
->hw_stopped
||
1158 (info
->type
== PORT_16550A
) ||
1159 info
->board
->chip_flag
) {
1160 spin_lock_irqsave(&info
->slock
, flags
);
1161 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
1162 info
->IER
|= UART_IER_THRI
;
1163 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1164 spin_unlock_irqrestore(&info
->slock
, flags
);
1171 static void mxser_flush_chars(struct tty_struct
*tty
)
1173 struct mxser_port
*info
= tty
->driver_data
;
1174 unsigned long flags
;
1176 if (info
->xmit_cnt
<= 0 || tty
->stopped
|| !info
->port
.xmit_buf
||
1177 (tty
->hw_stopped
&& info
->type
!= PORT_16550A
&&
1178 !info
->board
->chip_flag
))
1181 spin_lock_irqsave(&info
->slock
, flags
);
1183 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
1184 info
->IER
|= UART_IER_THRI
;
1185 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1187 spin_unlock_irqrestore(&info
->slock
, flags
);
1190 static int mxser_write_room(struct tty_struct
*tty
)
1192 struct mxser_port
*info
= tty
->driver_data
;
1195 ret
= SERIAL_XMIT_SIZE
- info
->xmit_cnt
- 1;
1196 return ret
< 0 ? 0 : ret
;
1199 static int mxser_chars_in_buffer(struct tty_struct
*tty
)
1201 struct mxser_port
*info
= tty
->driver_data
;
1202 return info
->xmit_cnt
;
1206 * ------------------------------------------------------------
1207 * friends of mxser_ioctl()
1208 * ------------------------------------------------------------
1210 static int mxser_get_serial_info(struct tty_struct
*tty
,
1211 struct serial_struct __user
*retinfo
)
1213 struct mxser_port
*info
= tty
->driver_data
;
1214 struct serial_struct tmp
= {
1217 .port
= info
->ioaddr
,
1218 .irq
= info
->board
->irq
,
1219 .flags
= info
->port
.flags
,
1220 .baud_base
= info
->baud_base
,
1221 .close_delay
= info
->port
.close_delay
,
1222 .closing_wait
= info
->port
.closing_wait
,
1223 .custom_divisor
= info
->custom_divisor
,
1226 if (copy_to_user(retinfo
, &tmp
, sizeof(*retinfo
)))
1231 static int mxser_set_serial_info(struct tty_struct
*tty
,
1232 struct serial_struct __user
*new_info
)
1234 struct mxser_port
*info
= tty
->driver_data
;
1235 struct tty_port
*port
= &info
->port
;
1236 struct serial_struct new_serial
;
1238 unsigned long sl_flags
;
1242 if (!new_info
|| !info
->ioaddr
)
1244 if (copy_from_user(&new_serial
, new_info
, sizeof(new_serial
)))
1247 if (new_serial
.irq
!= info
->board
->irq
||
1248 new_serial
.port
!= info
->ioaddr
)
1251 flags
= port
->flags
& ASYNC_SPD_MASK
;
1253 if (!capable(CAP_SYS_ADMIN
)) {
1254 if ((new_serial
.baud_base
!= info
->baud_base
) ||
1255 (new_serial
.close_delay
!= info
->port
.close_delay
) ||
1256 ((new_serial
.flags
& ~ASYNC_USR_MASK
) != (info
->port
.flags
& ~ASYNC_USR_MASK
)))
1258 info
->port
.flags
= ((info
->port
.flags
& ~ASYNC_USR_MASK
) |
1259 (new_serial
.flags
& ASYNC_USR_MASK
));
1262 * OK, past this point, all the error checking has been done.
1263 * At this point, we start making changes.....
1265 port
->flags
= ((port
->flags
& ~ASYNC_FLAGS
) |
1266 (new_serial
.flags
& ASYNC_FLAGS
));
1267 port
->close_delay
= new_serial
.close_delay
* HZ
/ 100;
1268 port
->closing_wait
= new_serial
.closing_wait
* HZ
/ 100;
1269 tty
->low_latency
= (port
->flags
& ASYNC_LOW_LATENCY
) ? 1 : 0;
1270 if ((port
->flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_CUST
&&
1271 (new_serial
.baud_base
!= info
->baud_base
||
1272 new_serial
.custom_divisor
!=
1273 info
->custom_divisor
)) {
1274 if (new_serial
.custom_divisor
== 0)
1276 baud
= new_serial
.baud_base
/ new_serial
.custom_divisor
;
1277 tty_encode_baud_rate(tty
, baud
, baud
);
1281 info
->type
= new_serial
.type
;
1283 process_txrx_fifo(info
);
1285 if (test_bit(ASYNCB_INITIALIZED
, &port
->flags
)) {
1286 if (flags
!= (port
->flags
& ASYNC_SPD_MASK
)) {
1287 spin_lock_irqsave(&info
->slock
, sl_flags
);
1288 mxser_change_speed(tty
, NULL
);
1289 spin_unlock_irqrestore(&info
->slock
, sl_flags
);
1292 retval
= mxser_activate(port
, tty
);
1294 set_bit(ASYNCB_INITIALIZED
, &port
->flags
);
1300 * mxser_get_lsr_info - get line status register info
1302 * Purpose: Let user call ioctl() to get info when the UART physically
1303 * is emptied. On bus types like RS485, the transmitter must
1304 * release the bus after transmitting. This must be done when
1305 * the transmit shift register is empty, not be done when the
1306 * transmit holding register is empty. This functionality
1307 * allows an RS485 driver to be written in user space.
1309 static int mxser_get_lsr_info(struct mxser_port
*info
,
1310 unsigned int __user
*value
)
1312 unsigned char status
;
1313 unsigned int result
;
1314 unsigned long flags
;
1316 spin_lock_irqsave(&info
->slock
, flags
);
1317 status
= inb(info
->ioaddr
+ UART_LSR
);
1318 spin_unlock_irqrestore(&info
->slock
, flags
);
1319 result
= ((status
& UART_LSR_TEMT
) ? TIOCSER_TEMT
: 0);
1320 return put_user(result
, value
);
1323 static int mxser_tiocmget(struct tty_struct
*tty
)
1325 struct mxser_port
*info
= tty
->driver_data
;
1326 unsigned char control
, status
;
1327 unsigned long flags
;
1330 if (tty
->index
== MXSER_PORTS
)
1331 return -ENOIOCTLCMD
;
1332 if (test_bit(TTY_IO_ERROR
, &tty
->flags
))
1335 control
= info
->MCR
;
1337 spin_lock_irqsave(&info
->slock
, flags
);
1338 status
= inb(info
->ioaddr
+ UART_MSR
);
1339 if (status
& UART_MSR_ANY_DELTA
)
1340 mxser_check_modem_status(tty
, info
, status
);
1341 spin_unlock_irqrestore(&info
->slock
, flags
);
1342 return ((control
& UART_MCR_RTS
) ? TIOCM_RTS
: 0) |
1343 ((control
& UART_MCR_DTR
) ? TIOCM_DTR
: 0) |
1344 ((status
& UART_MSR_DCD
) ? TIOCM_CAR
: 0) |
1345 ((status
& UART_MSR_RI
) ? TIOCM_RNG
: 0) |
1346 ((status
& UART_MSR_DSR
) ? TIOCM_DSR
: 0) |
1347 ((status
& UART_MSR_CTS
) ? TIOCM_CTS
: 0);
1350 static int mxser_tiocmset(struct tty_struct
*tty
,
1351 unsigned int set
, unsigned int clear
)
1353 struct mxser_port
*info
= tty
->driver_data
;
1354 unsigned long flags
;
1357 if (tty
->index
== MXSER_PORTS
)
1358 return -ENOIOCTLCMD
;
1359 if (test_bit(TTY_IO_ERROR
, &tty
->flags
))
1362 spin_lock_irqsave(&info
->slock
, flags
);
1364 if (set
& TIOCM_RTS
)
1365 info
->MCR
|= UART_MCR_RTS
;
1366 if (set
& TIOCM_DTR
)
1367 info
->MCR
|= UART_MCR_DTR
;
1369 if (clear
& TIOCM_RTS
)
1370 info
->MCR
&= ~UART_MCR_RTS
;
1371 if (clear
& TIOCM_DTR
)
1372 info
->MCR
&= ~UART_MCR_DTR
;
1374 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
1375 spin_unlock_irqrestore(&info
->slock
, flags
);
1379 static int __init
mxser_program_mode(int port
)
1391 id
= inb(port
+ 1) & 0x1F;
1392 if ((id
!= C168_ASIC_ID
) &&
1393 (id
!= C104_ASIC_ID
) &&
1394 (id
!= C102_ASIC_ID
) &&
1395 (id
!= CI132_ASIC_ID
) &&
1396 (id
!= CI134_ASIC_ID
) &&
1397 (id
!= CI104J_ASIC_ID
))
1399 for (i
= 0, j
= 0; i
< 4; i
++) {
1403 } else if ((j
== 1) && (n
== 1)) {
1414 static void __init
mxser_normal_mode(int port
)
1418 outb(0xA5, port
+ 1);
1419 outb(0x80, port
+ 3);
1420 outb(12, port
+ 0); /* 9600 bps */
1422 outb(0x03, port
+ 3); /* 8 data bits */
1423 outb(0x13, port
+ 4); /* loop back mode */
1424 for (i
= 0; i
< 16; i
++) {
1426 if ((n
& 0x61) == 0x60)
1431 outb(0x00, port
+ 4);
1434 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
1435 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
1436 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
1437 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
1438 #define EN_CCMD 0x000 /* Chip's command register */
1439 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
1440 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
1441 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
1442 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
1443 #define EN0_DCFG 0x00E /* Data configuration reg WR */
1444 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
1445 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
1446 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
1447 static int __init
mxser_read_register(int port
, unsigned short *regs
)
1449 int i
, k
, value
, id
;
1452 id
= mxser_program_mode(port
);
1455 for (i
= 0; i
< 14; i
++) {
1456 k
= (i
& 0x3F) | 0x180;
1457 for (j
= 0x100; j
> 0; j
>>= 1) {
1458 outb(CHIP_CS
, port
);
1460 outb(CHIP_CS
| CHIP_DO
, port
);
1461 outb(CHIP_CS
| CHIP_DO
| CHIP_SK
, port
); /* A? bit of read */
1463 outb(CHIP_CS
, port
);
1464 outb(CHIP_CS
| CHIP_SK
, port
); /* A? bit of read */
1469 for (k
= 0, j
= 0x8000; k
< 16; k
++, j
>>= 1) {
1470 outb(CHIP_CS
, port
);
1471 outb(CHIP_CS
| CHIP_SK
, port
);
1472 if (inb(port
) & CHIP_DI
)
1478 mxser_normal_mode(port
);
1482 static int mxser_ioctl_special(unsigned int cmd
, void __user
*argp
)
1484 struct mxser_port
*ip
;
1485 struct tty_port
*port
;
1486 struct tty_struct
*tty
;
1492 case MOXA_GET_MAJOR
:
1493 if (printk_ratelimit())
1494 printk(KERN_WARNING
"mxser: '%s' uses deprecated ioctl "
1495 "%x (GET_MAJOR), fix your userspace\n",
1496 current
->comm
, cmd
);
1497 return put_user(ttymajor
, (int __user
*)argp
);
1499 case MOXA_CHKPORTENABLE
:
1501 for (i
= 0; i
< MXSER_BOARDS
; i
++)
1502 for (j
= 0; j
< MXSER_PORTS_PER_BOARD
; j
++)
1503 if (mxser_boards
[i
].ports
[j
].ioaddr
)
1505 return put_user(result
, (unsigned long __user
*)argp
);
1506 case MOXA_GETDATACOUNT
:
1507 /* The receive side is locked by port->slock but it isn't
1508 clear that an exact snapshot is worth copying here */
1509 if (copy_to_user(argp
, &mxvar_log
, sizeof(mxvar_log
)))
1512 case MOXA_GETMSTATUS
: {
1513 struct mxser_mstatus ms
, __user
*msu
= argp
;
1514 for (i
= 0; i
< MXSER_BOARDS
; i
++)
1515 for (j
= 0; j
< MXSER_PORTS_PER_BOARD
; j
++) {
1516 ip
= &mxser_boards
[i
].ports
[j
];
1518 memset(&ms
, 0, sizeof(ms
));
1520 mutex_lock(&port
->mutex
);
1524 tty
= tty_port_tty_get(port
);
1526 if (!tty
|| !tty
->termios
)
1527 ms
.cflag
= ip
->normal_termios
.c_cflag
;
1529 ms
.cflag
= tty
->termios
->c_cflag
;
1531 spin_lock_irq(&ip
->slock
);
1532 status
= inb(ip
->ioaddr
+ UART_MSR
);
1533 spin_unlock_irq(&ip
->slock
);
1534 if (status
& UART_MSR_DCD
)
1536 if (status
& UART_MSR_DSR
)
1538 if (status
& UART_MSR_CTS
)
1541 mutex_unlock(&port
->mutex
);
1542 if (copy_to_user(msu
, &ms
, sizeof(ms
)))
1548 case MOXA_ASPP_MON_EXT
: {
1549 struct mxser_mon_ext
*me
; /* it's 2k, stack unfriendly */
1550 unsigned int cflag
, iflag
, p
;
1553 me
= kzalloc(sizeof(*me
), GFP_KERNEL
);
1557 for (i
= 0, p
= 0; i
< MXSER_BOARDS
; i
++) {
1558 for (j
= 0; j
< MXSER_PORTS_PER_BOARD
; j
++, p
++) {
1559 if (p
>= ARRAY_SIZE(me
->rx_cnt
)) {
1563 ip
= &mxser_boards
[i
].ports
[j
];
1566 mutex_lock(&port
->mutex
);
1568 mutex_unlock(&port
->mutex
);
1572 spin_lock_irq(&ip
->slock
);
1573 status
= mxser_get_msr(ip
->ioaddr
, 0, p
);
1575 if (status
& UART_MSR_TERI
)
1577 if (status
& UART_MSR_DDSR
)
1579 if (status
& UART_MSR_DDCD
)
1581 if (status
& UART_MSR_DCTS
)
1584 ip
->mon_data
.modem_status
= status
;
1585 me
->rx_cnt
[p
] = ip
->mon_data
.rxcnt
;
1586 me
->tx_cnt
[p
] = ip
->mon_data
.txcnt
;
1587 me
->up_rxcnt
[p
] = ip
->mon_data
.up_rxcnt
;
1588 me
->up_txcnt
[p
] = ip
->mon_data
.up_txcnt
;
1589 me
->modem_status
[p
] =
1590 ip
->mon_data
.modem_status
;
1591 spin_unlock_irq(&ip
->slock
);
1593 tty
= tty_port_tty_get(&ip
->port
);
1595 if (!tty
|| !tty
->termios
) {
1596 cflag
= ip
->normal_termios
.c_cflag
;
1597 iflag
= ip
->normal_termios
.c_iflag
;
1598 me
->baudrate
[p
] = tty_termios_baud_rate(&ip
->normal_termios
);
1600 cflag
= tty
->termios
->c_cflag
;
1601 iflag
= tty
->termios
->c_iflag
;
1602 me
->baudrate
[p
] = tty_get_baud_rate(tty
);
1606 me
->databits
[p
] = cflag
& CSIZE
;
1607 me
->stopbits
[p
] = cflag
& CSTOPB
;
1608 me
->parity
[p
] = cflag
& (PARENB
| PARODD
|
1611 if (cflag
& CRTSCTS
)
1612 me
->flowctrl
[p
] |= 0x03;
1614 if (iflag
& (IXON
| IXOFF
))
1615 me
->flowctrl
[p
] |= 0x0C;
1617 if (ip
->type
== PORT_16550A
)
1620 opmode
= inb(ip
->opmode_ioaddr
)>>((p
% 4) * 2);
1621 opmode
&= OP_MODE_MASK
;
1622 me
->iftype
[p
] = opmode
;
1623 mutex_unlock(&port
->mutex
);
1626 if (copy_to_user(argp
, me
, sizeof(*me
)))
1632 return -ENOIOCTLCMD
;
1637 static int mxser_cflags_changed(struct mxser_port
*info
, unsigned long arg
,
1638 struct async_icount
*cprev
)
1640 struct async_icount cnow
;
1641 unsigned long flags
;
1644 spin_lock_irqsave(&info
->slock
, flags
);
1645 cnow
= info
->icount
; /* atomic copy */
1646 spin_unlock_irqrestore(&info
->slock
, flags
);
1648 ret
= ((arg
& TIOCM_RNG
) && (cnow
.rng
!= cprev
->rng
)) ||
1649 ((arg
& TIOCM_DSR
) && (cnow
.dsr
!= cprev
->dsr
)) ||
1650 ((arg
& TIOCM_CD
) && (cnow
.dcd
!= cprev
->dcd
)) ||
1651 ((arg
& TIOCM_CTS
) && (cnow
.cts
!= cprev
->cts
));
1658 static int mxser_ioctl(struct tty_struct
*tty
,
1659 unsigned int cmd
, unsigned long arg
)
1661 struct mxser_port
*info
= tty
->driver_data
;
1662 struct tty_port
*port
= &info
->port
;
1663 struct async_icount cnow
;
1664 unsigned long flags
;
1665 void __user
*argp
= (void __user
*)arg
;
1668 if (tty
->index
== MXSER_PORTS
)
1669 return mxser_ioctl_special(cmd
, argp
);
1671 if (cmd
== MOXA_SET_OP_MODE
|| cmd
== MOXA_GET_OP_MODE
) {
1673 unsigned long opmode
;
1674 static unsigned char ModeMask
[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1676 unsigned char val
, mask
;
1679 if (cmd
== MOXA_SET_OP_MODE
) {
1680 if (get_user(opmode
, (int __user
*) argp
))
1682 if (opmode
!= RS232_MODE
&&
1683 opmode
!= RS485_2WIRE_MODE
&&
1684 opmode
!= RS422_MODE
&&
1685 opmode
!= RS485_4WIRE_MODE
)
1689 spin_lock_irq(&info
->slock
);
1690 val
= inb(info
->opmode_ioaddr
);
1692 val
|= (opmode
<< shiftbit
);
1693 outb(val
, info
->opmode_ioaddr
);
1694 spin_unlock_irq(&info
->slock
);
1697 spin_lock_irq(&info
->slock
);
1698 opmode
= inb(info
->opmode_ioaddr
) >> shiftbit
;
1699 spin_unlock_irq(&info
->slock
);
1700 opmode
&= OP_MODE_MASK
;
1701 if (put_user(opmode
, (int __user
*)argp
))
1707 if (cmd
!= TIOCGSERIAL
&& cmd
!= TIOCMIWAIT
&&
1708 test_bit(TTY_IO_ERROR
, &tty
->flags
))
1713 mutex_lock(&port
->mutex
);
1714 retval
= mxser_get_serial_info(tty
, argp
);
1715 mutex_unlock(&port
->mutex
);
1718 mutex_lock(&port
->mutex
);
1719 retval
= mxser_set_serial_info(tty
, argp
);
1720 mutex_unlock(&port
->mutex
);
1722 case TIOCSERGETLSR
: /* Get line status register */
1723 return mxser_get_lsr_info(info
, argp
);
1725 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1726 * - mask passed in arg for lines of interest
1727 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1728 * Caller should use TIOCGICOUNT to see which one it was
1731 spin_lock_irqsave(&info
->slock
, flags
);
1732 cnow
= info
->icount
; /* note the counters on entry */
1733 spin_unlock_irqrestore(&info
->slock
, flags
);
1735 return wait_event_interruptible(info
->port
.delta_msr_wait
,
1736 mxser_cflags_changed(info
, arg
, &cnow
));
1737 case MOXA_HighSpeedOn
:
1738 return put_user(info
->baud_base
!= 115200 ? 1 : 0, (int __user
*)argp
);
1739 case MOXA_SDS_RSTICOUNTER
:
1740 spin_lock_irq(&info
->slock
);
1741 info
->mon_data
.rxcnt
= 0;
1742 info
->mon_data
.txcnt
= 0;
1743 spin_unlock_irq(&info
->slock
);
1746 case MOXA_ASPP_OQUEUE
:{
1749 len
= mxser_chars_in_buffer(tty
);
1750 spin_lock_irq(&info
->slock
);
1751 lsr
= inb(info
->ioaddr
+ UART_LSR
) & UART_LSR_THRE
;
1752 spin_unlock_irq(&info
->slock
);
1753 len
+= (lsr
? 0 : 1);
1755 return put_user(len
, (int __user
*)argp
);
1757 case MOXA_ASPP_MON
: {
1760 spin_lock_irq(&info
->slock
);
1761 status
= mxser_get_msr(info
->ioaddr
, 1, tty
->index
);
1762 mxser_check_modem_status(tty
, info
, status
);
1764 mcr
= inb(info
->ioaddr
+ UART_MCR
);
1765 spin_unlock_irq(&info
->slock
);
1767 if (mcr
& MOXA_MUST_MCR_XON_FLAG
)
1768 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_XOFFHOLD
;
1770 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_XOFFHOLD
;
1772 if (mcr
& MOXA_MUST_MCR_TX_XON
)
1773 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_XOFFXENT
;
1775 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_XOFFXENT
;
1777 if (tty
->hw_stopped
)
1778 info
->mon_data
.hold_reason
|= NPPI_NOTIFY_CTSHOLD
;
1780 info
->mon_data
.hold_reason
&= ~NPPI_NOTIFY_CTSHOLD
;
1782 if (copy_to_user(argp
, &info
->mon_data
,
1783 sizeof(struct mxser_mon
)))
1788 case MOXA_ASPP_LSTATUS
: {
1789 if (put_user(info
->err_shadow
, (unsigned char __user
*)argp
))
1792 info
->err_shadow
= 0;
1795 case MOXA_SET_BAUD_METHOD
: {
1798 if (get_user(method
, (int __user
*)argp
))
1800 mxser_set_baud_method
[tty
->index
] = method
;
1801 return put_user(method
, (int __user
*)argp
);
1804 return -ENOIOCTLCMD
;
1810 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1811 * Return: write counters to the user passed counter struct
1812 * NB: both 1->0 and 0->1 transitions are counted except for
1813 * RI where only 0->1 is counted.
1816 static int mxser_get_icount(struct tty_struct
*tty
,
1817 struct serial_icounter_struct
*icount
)
1820 struct mxser_port
*info
= tty
->driver_data
;
1821 struct async_icount cnow
;
1822 unsigned long flags
;
1824 spin_lock_irqsave(&info
->slock
, flags
);
1825 cnow
= info
->icount
;
1826 spin_unlock_irqrestore(&info
->slock
, flags
);
1828 icount
->frame
= cnow
.frame
;
1829 icount
->brk
= cnow
.brk
;
1830 icount
->overrun
= cnow
.overrun
;
1831 icount
->buf_overrun
= cnow
.buf_overrun
;
1832 icount
->parity
= cnow
.parity
;
1833 icount
->rx
= cnow
.rx
;
1834 icount
->tx
= cnow
.tx
;
1835 icount
->cts
= cnow
.cts
;
1836 icount
->dsr
= cnow
.dsr
;
1837 icount
->rng
= cnow
.rng
;
1838 icount
->dcd
= cnow
.dcd
;
1842 static void mxser_stoprx(struct tty_struct
*tty
)
1844 struct mxser_port
*info
= tty
->driver_data
;
1846 info
->ldisc_stop_rx
= 1;
1848 if (info
->board
->chip_flag
) {
1849 info
->IER
&= ~MOXA_MUST_RECV_ISR
;
1850 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1852 info
->x_char
= STOP_CHAR(tty
);
1853 outb(0, info
->ioaddr
+ UART_IER
);
1854 info
->IER
|= UART_IER_THRI
;
1855 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1859 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1860 info
->MCR
&= ~UART_MCR_RTS
;
1861 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
1866 * This routine is called by the upper-layer tty layer to signal that
1867 * incoming characters should be throttled.
1869 static void mxser_throttle(struct tty_struct
*tty
)
1874 static void mxser_unthrottle(struct tty_struct
*tty
)
1876 struct mxser_port
*info
= tty
->driver_data
;
1879 info
->ldisc_stop_rx
= 0;
1884 if (info
->board
->chip_flag
) {
1885 info
->IER
|= MOXA_MUST_RECV_ISR
;
1886 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1888 info
->x_char
= START_CHAR(tty
);
1889 outb(0, info
->ioaddr
+ UART_IER
);
1890 info
->IER
|= UART_IER_THRI
;
1891 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1896 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1897 info
->MCR
|= UART_MCR_RTS
;
1898 outb(info
->MCR
, info
->ioaddr
+ UART_MCR
);
1903 * mxser_stop() and mxser_start()
1905 * This routines are called before setting or resetting tty->stopped.
1906 * They enable or disable transmitter interrupts, as necessary.
1908 static void mxser_stop(struct tty_struct
*tty
)
1910 struct mxser_port
*info
= tty
->driver_data
;
1911 unsigned long flags
;
1913 spin_lock_irqsave(&info
->slock
, flags
);
1914 if (info
->IER
& UART_IER_THRI
) {
1915 info
->IER
&= ~UART_IER_THRI
;
1916 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1918 spin_unlock_irqrestore(&info
->slock
, flags
);
1921 static void mxser_start(struct tty_struct
*tty
)
1923 struct mxser_port
*info
= tty
->driver_data
;
1924 unsigned long flags
;
1926 spin_lock_irqsave(&info
->slock
, flags
);
1927 if (info
->xmit_cnt
&& info
->port
.xmit_buf
) {
1928 outb(info
->IER
& ~UART_IER_THRI
, info
->ioaddr
+ UART_IER
);
1929 info
->IER
|= UART_IER_THRI
;
1930 outb(info
->IER
, info
->ioaddr
+ UART_IER
);
1932 spin_unlock_irqrestore(&info
->slock
, flags
);
1935 static void mxser_set_termios(struct tty_struct
*tty
, struct ktermios
*old_termios
)
1937 struct mxser_port
*info
= tty
->driver_data
;
1938 unsigned long flags
;
1940 spin_lock_irqsave(&info
->slock
, flags
);
1941 mxser_change_speed(tty
, old_termios
);
1942 spin_unlock_irqrestore(&info
->slock
, flags
);
1944 if ((old_termios
->c_cflag
& CRTSCTS
) &&
1945 !(tty
->termios
->c_cflag
& CRTSCTS
)) {
1946 tty
->hw_stopped
= 0;
1950 /* Handle sw stopped */
1951 if ((old_termios
->c_iflag
& IXON
) &&
1952 !(tty
->termios
->c_iflag
& IXON
)) {
1955 if (info
->board
->chip_flag
) {
1956 spin_lock_irqsave(&info
->slock
, flags
);
1957 mxser_disable_must_rx_software_flow_control(
1959 spin_unlock_irqrestore(&info
->slock
, flags
);
1967 * mxser_wait_until_sent() --- wait until the transmitter is empty
1969 static void mxser_wait_until_sent(struct tty_struct
*tty
, int timeout
)
1971 struct mxser_port
*info
= tty
->driver_data
;
1972 unsigned long orig_jiffies
, char_time
;
1973 unsigned long flags
;
1976 if (info
->type
== PORT_UNKNOWN
)
1979 if (info
->xmit_fifo_size
== 0)
1980 return; /* Just in case.... */
1982 orig_jiffies
= jiffies
;
1984 * Set the check interval to be 1/5 of the estimated time to
1985 * send a single character, and make it at least 1. The check
1986 * interval should also be less than the timeout.
1988 * Note: we have to use pretty tight timings here to satisfy
1991 char_time
= (info
->timeout
- HZ
/ 50) / info
->xmit_fifo_size
;
1992 char_time
= char_time
/ 5;
1995 if (timeout
&& timeout
< char_time
)
1996 char_time
= timeout
;
1998 * If the transmitter hasn't cleared in twice the approximate
1999 * amount of time to send the entire FIFO, it probably won't
2000 * ever clear. This assumes the UART isn't doing flow
2001 * control, which is currently the case. Hence, if it ever
2002 * takes longer than info->timeout, this is probably due to a
2003 * UART bug of some kind. So, we clamp the timeout parameter at
2006 if (!timeout
|| timeout
> 2 * info
->timeout
)
2007 timeout
= 2 * info
->timeout
;
2008 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2009 printk(KERN_DEBUG
"In rs_wait_until_sent(%d) check=%lu...",
2010 timeout
, char_time
);
2011 printk("jiff=%lu...", jiffies
);
2013 spin_lock_irqsave(&info
->slock
, flags
);
2014 while (!((lsr
= inb(info
->ioaddr
+ UART_LSR
)) & UART_LSR_TEMT
)) {
2015 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2016 printk("lsr = %d (jiff=%lu)...", lsr
, jiffies
);
2018 spin_unlock_irqrestore(&info
->slock
, flags
);
2019 schedule_timeout_interruptible(char_time
);
2020 spin_lock_irqsave(&info
->slock
, flags
);
2021 if (signal_pending(current
))
2023 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2026 spin_unlock_irqrestore(&info
->slock
, flags
);
2027 set_current_state(TASK_RUNNING
);
2029 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2030 printk("lsr = %d (jiff=%lu)...done\n", lsr
, jiffies
);
2035 * This routine is called by tty_hangup() when a hangup is signaled.
2037 static void mxser_hangup(struct tty_struct
*tty
)
2039 struct mxser_port
*info
= tty
->driver_data
;
2041 mxser_flush_buffer(tty
);
2042 tty_port_hangup(&info
->port
);
2046 * mxser_rs_break() --- routine which turns the break handling on or off
2048 static int mxser_rs_break(struct tty_struct
*tty
, int break_state
)
2050 struct mxser_port
*info
= tty
->driver_data
;
2051 unsigned long flags
;
2053 spin_lock_irqsave(&info
->slock
, flags
);
2054 if (break_state
== -1)
2055 outb(inb(info
->ioaddr
+ UART_LCR
) | UART_LCR_SBC
,
2056 info
->ioaddr
+ UART_LCR
);
2058 outb(inb(info
->ioaddr
+ UART_LCR
) & ~UART_LCR_SBC
,
2059 info
->ioaddr
+ UART_LCR
);
2060 spin_unlock_irqrestore(&info
->slock
, flags
);
2064 static void mxser_receive_chars(struct tty_struct
*tty
,
2065 struct mxser_port
*port
, int *status
)
2067 unsigned char ch
, gdl
;
2073 recv_room
= tty
->receive_room
;
2074 if (recv_room
== 0 && !port
->ldisc_stop_rx
)
2076 if (port
->board
->chip_flag
!= MOXA_OTHER_UART
) {
2078 if (*status
& UART_LSR_SPECIAL
)
2080 if (port
->board
->chip_flag
== MOXA_MUST_MU860_HWID
&&
2081 (*status
& MOXA_MUST_LSR_RERR
))
2083 if (*status
& MOXA_MUST_LSR_RERR
)
2086 gdl
= inb(port
->ioaddr
+ MOXA_MUST_GDL_REGISTER
);
2088 if (port
->board
->chip_flag
== MOXA_MUST_MU150_HWID
)
2089 gdl
&= MOXA_MUST_GDL_MASK
;
2090 if (gdl
>= recv_room
) {
2091 if (!port
->ldisc_stop_rx
)
2095 ch
= inb(port
->ioaddr
+ UART_RX
);
2096 tty_insert_flip_char(tty
, ch
, 0);
2107 ch
= inb(port
->ioaddr
+ UART_RX
);
2108 if (port
->board
->chip_flag
&& (*status
& UART_LSR_OE
))
2109 outb(0x23, port
->ioaddr
+ UART_FCR
);
2110 *status
&= port
->read_status_mask
;
2111 if (*status
& port
->ignore_status_mask
) {
2112 if (++ignored
> 100)
2116 if (*status
& UART_LSR_SPECIAL
) {
2117 if (*status
& UART_LSR_BI
) {
2121 if (port
->port
.flags
& ASYNC_SAK
)
2123 } else if (*status
& UART_LSR_PE
) {
2125 port
->icount
.parity
++;
2126 } else if (*status
& UART_LSR_FE
) {
2128 port
->icount
.frame
++;
2129 } else if (*status
& UART_LSR_OE
) {
2131 port
->icount
.overrun
++;
2135 tty_insert_flip_char(tty
, ch
, flag
);
2137 if (cnt
>= recv_room
) {
2138 if (!port
->ldisc_stop_rx
)
2145 if (port
->board
->chip_flag
)
2148 *status
= inb(port
->ioaddr
+ UART_LSR
);
2149 } while (*status
& UART_LSR_DR
);
2152 mxvar_log
.rxcnt
[tty
->index
] += cnt
;
2153 port
->mon_data
.rxcnt
+= cnt
;
2154 port
->mon_data
.up_rxcnt
+= cnt
;
2157 * We are called from an interrupt context with &port->slock
2158 * being held. Drop it temporarily in order to prevent
2159 * recursive locking.
2161 spin_unlock(&port
->slock
);
2162 tty_flip_buffer_push(tty
);
2163 spin_lock(&port
->slock
);
2166 static void mxser_transmit_chars(struct tty_struct
*tty
, struct mxser_port
*port
)
2171 outb(port
->x_char
, port
->ioaddr
+ UART_TX
);
2173 mxvar_log
.txcnt
[tty
->index
]++;
2174 port
->mon_data
.txcnt
++;
2175 port
->mon_data
.up_txcnt
++;
2180 if (port
->port
.xmit_buf
== NULL
)
2183 if (port
->xmit_cnt
<= 0 || tty
->stopped
||
2185 (port
->type
!= PORT_16550A
) &&
2186 (!port
->board
->chip_flag
))) {
2187 port
->IER
&= ~UART_IER_THRI
;
2188 outb(port
->IER
, port
->ioaddr
+ UART_IER
);
2192 cnt
= port
->xmit_cnt
;
2193 count
= port
->xmit_fifo_size
;
2195 outb(port
->port
.xmit_buf
[port
->xmit_tail
++],
2196 port
->ioaddr
+ UART_TX
);
2197 port
->xmit_tail
= port
->xmit_tail
& (SERIAL_XMIT_SIZE
- 1);
2198 if (--port
->xmit_cnt
<= 0)
2200 } while (--count
> 0);
2201 mxvar_log
.txcnt
[tty
->index
] += (cnt
- port
->xmit_cnt
);
2203 port
->mon_data
.txcnt
+= (cnt
- port
->xmit_cnt
);
2204 port
->mon_data
.up_txcnt
+= (cnt
- port
->xmit_cnt
);
2205 port
->icount
.tx
+= (cnt
- port
->xmit_cnt
);
2207 if (port
->xmit_cnt
< WAKEUP_CHARS
)
2210 if (port
->xmit_cnt
<= 0) {
2211 port
->IER
&= ~UART_IER_THRI
;
2212 outb(port
->IER
, port
->ioaddr
+ UART_IER
);
2217 * This is the serial driver's generic interrupt routine
2219 static irqreturn_t
mxser_interrupt(int irq
, void *dev_id
)
2222 struct mxser_board
*brd
= NULL
;
2223 struct mxser_port
*port
;
2224 int max
, irqbits
, bits
, msr
;
2225 unsigned int int_cnt
, pass_counter
= 0;
2226 int handled
= IRQ_NONE
;
2227 struct tty_struct
*tty
;
2229 for (i
= 0; i
< MXSER_BOARDS
; i
++)
2230 if (dev_id
== &mxser_boards
[i
]) {
2235 if (i
== MXSER_BOARDS
)
2239 max
= brd
->info
->nports
;
2240 while (pass_counter
++ < MXSER_ISR_PASS_LIMIT
) {
2241 irqbits
= inb(brd
->vector
) & brd
->vector_mask
;
2242 if (irqbits
== brd
->vector_mask
)
2245 handled
= IRQ_HANDLED
;
2246 for (i
= 0, bits
= 1; i
< max
; i
++, irqbits
|= bits
, bits
<<= 1) {
2247 if (irqbits
== brd
->vector_mask
)
2251 port
= &brd
->ports
[i
];
2254 spin_lock(&port
->slock
);
2256 iir
= inb(port
->ioaddr
+ UART_IIR
);
2257 if (iir
& UART_IIR_NO_INT
)
2259 iir
&= MOXA_MUST_IIR_MASK
;
2260 tty
= tty_port_tty_get(&port
->port
);
2262 (port
->port
.flags
& ASYNC_CLOSING
) ||
2263 !(port
->port
.flags
&
2264 ASYNC_INITIALIZED
)) {
2265 status
= inb(port
->ioaddr
+ UART_LSR
);
2266 outb(0x27, port
->ioaddr
+ UART_FCR
);
2267 inb(port
->ioaddr
+ UART_MSR
);
2272 status
= inb(port
->ioaddr
+ UART_LSR
);
2274 if (status
& UART_LSR_PE
)
2275 port
->err_shadow
|= NPPI_NOTIFY_PARITY
;
2276 if (status
& UART_LSR_FE
)
2277 port
->err_shadow
|= NPPI_NOTIFY_FRAMING
;
2278 if (status
& UART_LSR_OE
)
2280 NPPI_NOTIFY_HW_OVERRUN
;
2281 if (status
& UART_LSR_BI
)
2282 port
->err_shadow
|= NPPI_NOTIFY_BREAK
;
2284 if (port
->board
->chip_flag
) {
2285 if (iir
== MOXA_MUST_IIR_GDA
||
2286 iir
== MOXA_MUST_IIR_RDA
||
2287 iir
== MOXA_MUST_IIR_RTO
||
2288 iir
== MOXA_MUST_IIR_LSR
)
2289 mxser_receive_chars(tty
, port
,
2293 status
&= port
->read_status_mask
;
2294 if (status
& UART_LSR_DR
)
2295 mxser_receive_chars(tty
, port
,
2298 msr
= inb(port
->ioaddr
+ UART_MSR
);
2299 if (msr
& UART_MSR_ANY_DELTA
)
2300 mxser_check_modem_status(tty
, port
, msr
);
2302 if (port
->board
->chip_flag
) {
2303 if (iir
== 0x02 && (status
&
2305 mxser_transmit_chars(tty
, port
);
2307 if (status
& UART_LSR_THRE
)
2308 mxser_transmit_chars(tty
, port
);
2311 } while (int_cnt
++ < MXSER_ISR_PASS_LIMIT
);
2312 spin_unlock(&port
->slock
);
2320 static const struct tty_operations mxser_ops
= {
2322 .close
= mxser_close
,
2323 .write
= mxser_write
,
2324 .put_char
= mxser_put_char
,
2325 .flush_chars
= mxser_flush_chars
,
2326 .write_room
= mxser_write_room
,
2327 .chars_in_buffer
= mxser_chars_in_buffer
,
2328 .flush_buffer
= mxser_flush_buffer
,
2329 .ioctl
= mxser_ioctl
,
2330 .throttle
= mxser_throttle
,
2331 .unthrottle
= mxser_unthrottle
,
2332 .set_termios
= mxser_set_termios
,
2334 .start
= mxser_start
,
2335 .hangup
= mxser_hangup
,
2336 .break_ctl
= mxser_rs_break
,
2337 .wait_until_sent
= mxser_wait_until_sent
,
2338 .tiocmget
= mxser_tiocmget
,
2339 .tiocmset
= mxser_tiocmset
,
2340 .get_icount
= mxser_get_icount
,
2343 struct tty_port_operations mxser_port_ops
= {
2344 .carrier_raised
= mxser_carrier_raised
,
2345 .dtr_rts
= mxser_dtr_rts
,
2346 .activate
= mxser_activate
,
2347 .shutdown
= mxser_shutdown_port
,
2351 * The MOXA Smartio/Industio serial driver boot-time initialization code!
2354 static void mxser_release_ISA_res(struct mxser_board
*brd
)
2356 free_irq(brd
->irq
, brd
);
2357 release_region(brd
->ports
[0].ioaddr
, 8 * brd
->info
->nports
);
2358 release_region(brd
->vector
, 1);
2361 static int __devinit
mxser_initbrd(struct mxser_board
*brd
,
2362 struct pci_dev
*pdev
)
2364 struct mxser_port
*info
;
2368 printk(KERN_INFO
"mxser: max. baud rate = %d bps\n",
2369 brd
->ports
[0].max_baud
);
2371 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2372 info
= &brd
->ports
[i
];
2373 tty_port_init(&info
->port
);
2374 info
->port
.ops
= &mxser_port_ops
;
2377 info
->ldisc_stop_rx
= 0;
2379 /* Enhance mode enabled here */
2380 if (brd
->chip_flag
!= MOXA_OTHER_UART
)
2381 mxser_enable_must_enchance_mode(info
->ioaddr
);
2383 info
->port
.flags
= ASYNC_SHARE_IRQ
;
2384 info
->type
= brd
->uart_type
;
2386 process_txrx_fifo(info
);
2388 info
->custom_divisor
= info
->baud_base
* 16;
2389 info
->port
.close_delay
= 5 * HZ
/ 10;
2390 info
->port
.closing_wait
= 30 * HZ
;
2391 info
->normal_termios
= mxvar_sdriver
->init_termios
;
2392 memset(&info
->mon_data
, 0, sizeof(struct mxser_mon
));
2393 info
->err_shadow
= 0;
2394 spin_lock_init(&info
->slock
);
2396 /* before set INT ISR, disable all int */
2397 outb(inb(info
->ioaddr
+ UART_IER
) & 0xf0,
2398 info
->ioaddr
+ UART_IER
);
2401 retval
= request_irq(brd
->irq
, mxser_interrupt
, IRQF_SHARED
, "mxser",
2404 printk(KERN_ERR
"Board %s: Request irq failed, IRQ (%d) may "
2405 "conflict with another device.\n",
2406 brd
->info
->name
, brd
->irq
);
2411 static int __init
mxser_get_ISA_conf(int cap
, struct mxser_board
*brd
)
2414 unsigned short regs
[16], irq
;
2415 unsigned char scratch
, scratch2
;
2417 brd
->chip_flag
= MOXA_OTHER_UART
;
2419 id
= mxser_read_register(cap
, regs
);
2422 brd
->info
= &mxser_cards
[0];
2425 brd
->info
= &mxser_cards
[1];
2427 case CI104J_ASIC_ID
:
2428 brd
->info
= &mxser_cards
[2];
2431 brd
->info
= &mxser_cards
[5];
2434 brd
->info
= &mxser_cards
[6];
2437 brd
->info
= &mxser_cards
[7];
2444 /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2445 Flag-hack checks if configuration should be read as 2-port here. */
2446 if (brd
->info
->nports
== 2 || (brd
->info
->flags
& MXSER_HAS2
)) {
2447 irq
= regs
[9] & 0xF000;
2448 irq
= irq
| (irq
>> 4);
2449 if (irq
!= (regs
[9] & 0xFF00))
2450 goto err_irqconflict
;
2451 } else if (brd
->info
->nports
== 4) {
2452 irq
= regs
[9] & 0xF000;
2453 irq
= irq
| (irq
>> 4);
2454 irq
= irq
| (irq
>> 8);
2456 goto err_irqconflict
;
2457 } else if (brd
->info
->nports
== 8) {
2458 irq
= regs
[9] & 0xF000;
2459 irq
= irq
| (irq
>> 4);
2460 irq
= irq
| (irq
>> 8);
2461 if ((irq
!= regs
[9]) || (irq
!= regs
[10]))
2462 goto err_irqconflict
;
2466 printk(KERN_ERR
"mxser: interrupt number unset\n");
2469 brd
->irq
= ((int)(irq
& 0xF000) >> 12);
2470 for (i
= 0; i
< 8; i
++)
2471 brd
->ports
[i
].ioaddr
= (int) regs
[i
+ 1] & 0xFFF8;
2472 if ((regs
[12] & 0x80) == 0) {
2473 printk(KERN_ERR
"mxser: invalid interrupt vector\n");
2476 brd
->vector
= (int)regs
[11]; /* interrupt vector */
2478 brd
->vector_mask
= 0x00FF;
2480 brd
->vector_mask
= 0x000F;
2481 for (i
= 7, bits
= 0x0100; i
>= 0; i
--, bits
<<= 1) {
2482 if (regs
[12] & bits
) {
2483 brd
->ports
[i
].baud_base
= 921600;
2484 brd
->ports
[i
].max_baud
= 921600;
2486 brd
->ports
[i
].baud_base
= 115200;
2487 brd
->ports
[i
].max_baud
= 115200;
2490 scratch2
= inb(cap
+ UART_LCR
) & (~UART_LCR_DLAB
);
2491 outb(scratch2
| UART_LCR_DLAB
, cap
+ UART_LCR
);
2492 outb(0, cap
+ UART_EFR
); /* EFR is the same as FCR */
2493 outb(scratch2
, cap
+ UART_LCR
);
2494 outb(UART_FCR_ENABLE_FIFO
, cap
+ UART_FCR
);
2495 scratch
= inb(cap
+ UART_IIR
);
2498 brd
->uart_type
= PORT_16550A
;
2500 brd
->uart_type
= PORT_16450
;
2501 if (!request_region(brd
->ports
[0].ioaddr
, 8 * brd
->info
->nports
,
2503 printk(KERN_ERR
"mxser: can't request ports I/O region: "
2504 "0x%.8lx-0x%.8lx\n",
2505 brd
->ports
[0].ioaddr
, brd
->ports
[0].ioaddr
+
2506 8 * brd
->info
->nports
- 1);
2509 if (!request_region(brd
->vector
, 1, "mxser(vector)")) {
2510 release_region(brd
->ports
[0].ioaddr
, 8 * brd
->info
->nports
);
2511 printk(KERN_ERR
"mxser: can't request interrupt vector region: "
2512 "0x%.8lx-0x%.8lx\n",
2513 brd
->ports
[0].ioaddr
, brd
->ports
[0].ioaddr
+
2514 8 * brd
->info
->nports
- 1);
2517 return brd
->info
->nports
;
2520 printk(KERN_ERR
"mxser: invalid interrupt number\n");
2524 static int __devinit
mxser_probe(struct pci_dev
*pdev
,
2525 const struct pci_device_id
*ent
)
2528 struct mxser_board
*brd
;
2530 unsigned long ioaddress
;
2531 int retval
= -EINVAL
;
2533 for (i
= 0; i
< MXSER_BOARDS
; i
++)
2534 if (mxser_boards
[i
].info
== NULL
)
2537 if (i
>= MXSER_BOARDS
) {
2538 dev_err(&pdev
->dev
, "too many boards found (maximum %d), board "
2539 "not configured\n", MXSER_BOARDS
);
2543 brd
= &mxser_boards
[i
];
2544 brd
->idx
= i
* MXSER_PORTS_PER_BOARD
;
2545 dev_info(&pdev
->dev
, "found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2546 mxser_cards
[ent
->driver_data
].name
,
2547 pdev
->bus
->number
, PCI_SLOT(pdev
->devfn
));
2549 retval
= pci_enable_device(pdev
);
2551 dev_err(&pdev
->dev
, "PCI enable failed\n");
2556 ioaddress
= pci_resource_start(pdev
, 2);
2557 retval
= pci_request_region(pdev
, 2, "mxser(IO)");
2561 brd
->info
= &mxser_cards
[ent
->driver_data
];
2562 for (i
= 0; i
< brd
->info
->nports
; i
++)
2563 brd
->ports
[i
].ioaddr
= ioaddress
+ 8 * i
;
2566 ioaddress
= pci_resource_start(pdev
, 3);
2567 retval
= pci_request_region(pdev
, 3, "mxser(vector)");
2570 brd
->vector
= ioaddress
;
2573 brd
->irq
= pdev
->irq
;
2575 brd
->chip_flag
= CheckIsMoxaMust(brd
->ports
[0].ioaddr
);
2576 brd
->uart_type
= PORT_16550A
;
2577 brd
->vector_mask
= 0;
2579 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2580 for (j
= 0; j
< UART_INFO_NUM
; j
++) {
2581 if (Gpci_uart_info
[j
].type
== brd
->chip_flag
) {
2582 brd
->ports
[i
].max_baud
=
2583 Gpci_uart_info
[j
].max_baud
;
2585 /* exception....CP-102 */
2586 if (brd
->info
->flags
& MXSER_HIGHBAUD
)
2587 brd
->ports
[i
].max_baud
= 921600;
2593 if (brd
->chip_flag
== MOXA_MUST_MU860_HWID
) {
2594 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2596 brd
->ports
[i
].opmode_ioaddr
= ioaddress
+ 4;
2598 brd
->ports
[i
].opmode_ioaddr
= ioaddress
+ 0x0c;
2600 outb(0, ioaddress
+ 4); /* default set to RS232 mode */
2601 outb(0, ioaddress
+ 0x0c); /* default set to RS232 mode */
2604 for (i
= 0; i
< brd
->info
->nports
; i
++) {
2605 brd
->vector_mask
|= (1 << i
);
2606 brd
->ports
[i
].baud_base
= 921600;
2609 /* mxser_initbrd will hook ISR. */
2610 retval
= mxser_initbrd(brd
, pdev
);
2614 for (i
= 0; i
< brd
->info
->nports
; i
++)
2615 tty_register_device(mxvar_sdriver
, brd
->idx
+ i
, &pdev
->dev
);
2617 pci_set_drvdata(pdev
, brd
);
2621 pci_release_region(pdev
, 3);
2624 pci_release_region(pdev
, 2);
2626 pci_disable_device(pdev
);
2634 static void __devexit
mxser_remove(struct pci_dev
*pdev
)
2637 struct mxser_board
*brd
= pci_get_drvdata(pdev
);
2640 for (i
= 0; i
< brd
->info
->nports
; i
++)
2641 tty_unregister_device(mxvar_sdriver
, brd
->idx
+ i
);
2643 free_irq(pdev
->irq
, brd
);
2644 pci_release_region(pdev
, 2);
2645 pci_release_region(pdev
, 3);
2646 pci_disable_device(pdev
);
2651 static struct pci_driver mxser_driver
= {
2653 .id_table
= mxser_pcibrds
,
2654 .probe
= mxser_probe
,
2655 .remove
= __devexit_p(mxser_remove
)
2658 static int __init
mxser_module_init(void)
2660 struct mxser_board
*brd
;
2661 unsigned int b
, i
, m
;
2664 mxvar_sdriver
= alloc_tty_driver(MXSER_PORTS
+ 1);
2668 printk(KERN_INFO
"MOXA Smartio/Industio family driver version %s\n",
2671 /* Initialize the tty_driver structure */
2672 mxvar_sdriver
->owner
= THIS_MODULE
;
2673 mxvar_sdriver
->magic
= TTY_DRIVER_MAGIC
;
2674 mxvar_sdriver
->name
= "ttyMI";
2675 mxvar_sdriver
->major
= ttymajor
;
2676 mxvar_sdriver
->minor_start
= 0;
2677 mxvar_sdriver
->num
= MXSER_PORTS
+ 1;
2678 mxvar_sdriver
->type
= TTY_DRIVER_TYPE_SERIAL
;
2679 mxvar_sdriver
->subtype
= SERIAL_TYPE_NORMAL
;
2680 mxvar_sdriver
->init_termios
= tty_std_termios
;
2681 mxvar_sdriver
->init_termios
.c_cflag
= B9600
|CS8
|CREAD
|HUPCL
|CLOCAL
;
2682 mxvar_sdriver
->flags
= TTY_DRIVER_REAL_RAW
|TTY_DRIVER_DYNAMIC_DEV
;
2683 tty_set_operations(mxvar_sdriver
, &mxser_ops
);
2685 retval
= tty_register_driver(mxvar_sdriver
);
2687 printk(KERN_ERR
"Couldn't install MOXA Smartio/Industio family "
2692 /* Start finding ISA boards here */
2693 for (m
= 0, b
= 0; b
< MXSER_BOARDS
; b
++) {
2697 brd
= &mxser_boards
[m
];
2698 retval
= mxser_get_ISA_conf(ioaddr
[b
], brd
);
2704 printk(KERN_INFO
"mxser: found MOXA %s board (CAP=0x%lx)\n",
2705 brd
->info
->name
, ioaddr
[b
]);
2707 /* mxser_initbrd will hook ISR. */
2708 if (mxser_initbrd(brd
, NULL
) < 0) {
2713 brd
->idx
= m
* MXSER_PORTS_PER_BOARD
;
2714 for (i
= 0; i
< brd
->info
->nports
; i
++)
2715 tty_register_device(mxvar_sdriver
, brd
->idx
+ i
, NULL
);
2720 retval
= pci_register_driver(&mxser_driver
);
2722 printk(KERN_ERR
"mxser: can't register pci driver\n");
2726 } /* else: we have some ISA cards under control */
2731 tty_unregister_driver(mxvar_sdriver
);
2733 put_tty_driver(mxvar_sdriver
);
2737 static void __exit
mxser_module_exit(void)
2741 pci_unregister_driver(&mxser_driver
);
2743 for (i
= 0; i
< MXSER_BOARDS
; i
++) /* ISA remains */
2744 if (mxser_boards
[i
].info
!= NULL
)
2745 for (j
= 0; j
< mxser_boards
[i
].info
->nports
; j
++)
2746 tty_unregister_device(mxvar_sdriver
,
2747 mxser_boards
[i
].idx
+ j
);
2748 tty_unregister_driver(mxvar_sdriver
);
2749 put_tty_driver(mxvar_sdriver
);
2751 for (i
= 0; i
< MXSER_BOARDS
; i
++)
2752 if (mxser_boards
[i
].info
!= NULL
)
2753 mxser_release_ISA_res(&mxser_boards
[i
]);
2756 module_init(mxser_module_init
);
2757 module_exit(mxser_module_exit
);