1 /*****************************************************************************/
3 * moxa.c -- MOXA Intellio family multiport serial driver.
5 * Copyright (C) 1999-2000 Moxa Technologies (support@moxa.com).
6 * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com>
8 * This code is loosely based on the Linux serial driver, written by
9 * Linus Torvalds, Theodore T'so and others.
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.
18 * MOXA Intellio Series Driver
24 #include <linux/module.h>
25 #include <linux/types.h>
27 #include <linux/ioport.h>
28 #include <linux/errno.h>
29 #include <linux/firmware.h>
30 #include <linux/signal.h>
31 #include <linux/sched.h>
32 #include <linux/timer.h>
33 #include <linux/interrupt.h>
34 #include <linux/tty.h>
35 #include <linux/tty_flip.h>
36 #include <linux/major.h>
37 #include <linux/string.h>
38 #include <linux/fcntl.h>
39 #include <linux/ptrace.h>
40 #include <linux/serial.h>
41 #include <linux/tty_driver.h>
42 #include <linux/delay.h>
43 #include <linux/pci.h>
44 #include <linux/init.h>
45 #include <linux/bitops.h>
46 #include <linux/slab.h>
48 #include <asm/system.h>
50 #include <asm/uaccess.h>
54 #define MOXA_VERSION "6.0k"
56 #define MOXA_FW_HDRLEN 32
60 #define MAX_BOARDS 4 /* Don't change this value */
61 #define MAX_PORTS_PER_BOARD 32 /* Don't change this value */
62 #define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD)
64 #define MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \
65 (brd)->boardType == MOXA_BOARD_C320_PCI)
68 * Define the Moxa PCI vendor and device IDs.
70 #define MOXA_BUS_TYPE_ISA 0
71 #define MOXA_BUS_TYPE_PCI 1
74 MOXA_BOARD_C218_PCI
= 1,
81 static char *moxa_brdname
[] =
83 "C218 Turbo PCI series",
84 "C218 Turbo ISA series",
85 "C320 Turbo PCI series",
86 "C320 Turbo ISA series",
91 static struct pci_device_id moxa_pcibrds
[] = {
92 { PCI_DEVICE(PCI_VENDOR_ID_MOXA
, PCI_DEVICE_ID_MOXA_C218
),
93 .driver_data
= MOXA_BOARD_C218_PCI
},
94 { PCI_DEVICE(PCI_VENDOR_ID_MOXA
, PCI_DEVICE_ID_MOXA_C320
),
95 .driver_data
= MOXA_BOARD_C320_PCI
},
96 { PCI_DEVICE(PCI_VENDOR_ID_MOXA
, PCI_DEVICE_ID_MOXA_CP204J
),
97 .driver_data
= MOXA_BOARD_CP204J
},
100 MODULE_DEVICE_TABLE(pci
, moxa_pcibrds
);
101 #endif /* CONFIG_PCI */
105 static struct moxa_board_conf
{
112 struct moxa_port
*ports
;
114 void __iomem
*basemem
;
115 void __iomem
*intNdx
;
116 void __iomem
*intPend
;
117 void __iomem
*intTable
;
118 } moxa_boards
[MAX_BOARDS
];
120 struct mxser_mstatus
{
134 struct tty_port port
;
135 struct moxa_board_conf
*board
;
136 void __iomem
*tableAddr
;
140 unsigned long statusflags
;
142 u8 DCDState
; /* Protected by the port lock */
149 int rxcnt
[MAX_PORTS
];
150 int txcnt
[MAX_PORTS
];
158 #define SERIAL_DO_RESTART
160 #define WAKEUP_CHARS 256
162 static int ttymajor
= MOXAMAJOR
;
163 static struct mon_str moxaLog
;
164 static unsigned int moxaFuncTout
= HZ
/ 2;
165 static unsigned int moxaLowWaterChk
;
166 static DEFINE_MUTEX(moxa_openlock
);
167 static DEFINE_SPINLOCK(moxa_lock
);
169 static unsigned long baseaddr
[MAX_BOARDS
];
170 static unsigned int type
[MAX_BOARDS
];
171 static unsigned int numports
[MAX_BOARDS
];
173 MODULE_AUTHOR("William Chen");
174 MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
175 MODULE_LICENSE("GPL");
176 MODULE_FIRMWARE("c218tunx.cod");
177 MODULE_FIRMWARE("cp204unx.cod");
178 MODULE_FIRMWARE("c320tunx.cod");
180 module_param_array(type
, uint
, NULL
, 0);
181 MODULE_PARM_DESC(type
, "card type: C218=2, C320=4");
182 module_param_array(baseaddr
, ulong
, NULL
, 0);
183 MODULE_PARM_DESC(baseaddr
, "base address");
184 module_param_array(numports
, uint
, NULL
, 0);
185 MODULE_PARM_DESC(numports
, "numports (ignored for C218)");
187 module_param(ttymajor
, int, 0);
192 static int moxa_open(struct tty_struct
*, struct file
*);
193 static void moxa_close(struct tty_struct
*, struct file
*);
194 static int moxa_write(struct tty_struct
*, const unsigned char *, int);
195 static int moxa_write_room(struct tty_struct
*);
196 static void moxa_flush_buffer(struct tty_struct
*);
197 static int moxa_chars_in_buffer(struct tty_struct
*);
198 static void moxa_set_termios(struct tty_struct
*, struct ktermios
*);
199 static void moxa_stop(struct tty_struct
*);
200 static void moxa_start(struct tty_struct
*);
201 static void moxa_hangup(struct tty_struct
*);
202 static int moxa_tiocmget(struct tty_struct
*tty
);
203 static int moxa_tiocmset(struct tty_struct
*tty
,
204 unsigned int set
, unsigned int clear
);
205 static void moxa_poll(unsigned long);
206 static void moxa_set_tty_param(struct tty_struct
*, struct ktermios
*);
207 static void moxa_shutdown(struct tty_port
*);
208 static int moxa_carrier_raised(struct tty_port
*);
209 static void moxa_dtr_rts(struct tty_port
*, int);
211 * moxa board interface functions:
213 static void MoxaPortEnable(struct moxa_port
*);
214 static void MoxaPortDisable(struct moxa_port
*);
215 static int MoxaPortSetTermio(struct moxa_port
*, struct ktermios
*, speed_t
);
216 static int MoxaPortGetLineOut(struct moxa_port
*, int *, int *);
217 static void MoxaPortLineCtrl(struct moxa_port
*, int, int);
218 static void MoxaPortFlowCtrl(struct moxa_port
*, int, int, int, int, int);
219 static int MoxaPortLineStatus(struct moxa_port
*);
220 static void MoxaPortFlushData(struct moxa_port
*, int);
221 static int MoxaPortWriteData(struct tty_struct
*, const unsigned char *, int);
222 static int MoxaPortReadData(struct moxa_port
*);
223 static int MoxaPortTxQueue(struct moxa_port
*);
224 static int MoxaPortRxQueue(struct moxa_port
*);
225 static int MoxaPortTxFree(struct moxa_port
*);
226 static void MoxaPortTxDisable(struct moxa_port
*);
227 static void MoxaPortTxEnable(struct moxa_port
*);
228 static int moxa_get_serial_info(struct moxa_port
*, struct serial_struct __user
*);
229 static int moxa_set_serial_info(struct moxa_port
*, struct serial_struct __user
*);
230 static void MoxaSetFifo(struct moxa_port
*port
, int enable
);
236 static DEFINE_SPINLOCK(moxafunc_lock
);
238 static void moxa_wait_finish(void __iomem
*ofsAddr
)
240 unsigned long end
= jiffies
+ moxaFuncTout
;
242 while (readw(ofsAddr
+ FuncCode
) != 0)
243 if (time_after(jiffies
, end
))
245 if (readw(ofsAddr
+ FuncCode
) != 0 && printk_ratelimit())
246 printk(KERN_WARNING
"moxa function expired\n");
249 static void moxafunc(void __iomem
*ofsAddr
, u16 cmd
, u16 arg
)
252 spin_lock_irqsave(&moxafunc_lock
, flags
);
253 writew(arg
, ofsAddr
+ FuncArg
);
254 writew(cmd
, ofsAddr
+ FuncCode
);
255 moxa_wait_finish(ofsAddr
);
256 spin_unlock_irqrestore(&moxafunc_lock
, flags
);
259 static int moxafuncret(void __iomem
*ofsAddr
, u16 cmd
, u16 arg
)
263 spin_lock_irqsave(&moxafunc_lock
, flags
);
264 writew(arg
, ofsAddr
+ FuncArg
);
265 writew(cmd
, ofsAddr
+ FuncCode
);
266 moxa_wait_finish(ofsAddr
);
267 ret
= readw(ofsAddr
+ FuncArg
);
268 spin_unlock_irqrestore(&moxafunc_lock
, flags
);
272 static void moxa_low_water_check(void __iomem
*ofsAddr
)
274 u16 rptr
, wptr
, mask
, len
;
276 if (readb(ofsAddr
+ FlagStat
) & Xoff_state
) {
277 rptr
= readw(ofsAddr
+ RXrptr
);
278 wptr
= readw(ofsAddr
+ RXwptr
);
279 mask
= readw(ofsAddr
+ RX_mask
);
280 len
= (wptr
- rptr
) & mask
;
281 if (len
<= Low_water
)
282 moxafunc(ofsAddr
, FC_SendXon
, 0);
290 static int moxa_ioctl(struct tty_struct
*tty
,
291 unsigned int cmd
, unsigned long arg
)
293 struct moxa_port
*ch
= tty
->driver_data
;
294 void __user
*argp
= (void __user
*)arg
;
297 if (tty
->index
== MAX_PORTS
) {
298 if (cmd
!= MOXA_GETDATACOUNT
&& cmd
!= MOXA_GET_IOQUEUE
&&
299 cmd
!= MOXA_GETMSTATUS
)
305 case MOXA_GETDATACOUNT
:
306 moxaLog
.tick
= jiffies
;
307 if (copy_to_user(argp
, &moxaLog
, sizeof(moxaLog
)))
310 case MOXA_FLUSH_QUEUE
:
311 MoxaPortFlushData(ch
, arg
);
313 case MOXA_GET_IOQUEUE
: {
314 struct moxaq_str __user
*argm
= argp
;
315 struct moxaq_str tmp
;
319 for (i
= 0; i
< MAX_BOARDS
; i
++) {
320 p
= moxa_boards
[i
].ports
;
321 for (j
= 0; j
< MAX_PORTS_PER_BOARD
; j
++, p
++, argm
++) {
322 memset(&tmp
, 0, sizeof(tmp
));
323 spin_lock_bh(&moxa_lock
);
324 if (moxa_boards
[i
].ready
) {
325 tmp
.inq
= MoxaPortRxQueue(p
);
326 tmp
.outq
= MoxaPortTxQueue(p
);
328 spin_unlock_bh(&moxa_lock
);
329 if (copy_to_user(argm
, &tmp
, sizeof(tmp
)))
334 } case MOXA_GET_OQUEUE
:
335 status
= MoxaPortTxQueue(ch
);
336 ret
= put_user(status
, (unsigned long __user
*)argp
);
338 case MOXA_GET_IQUEUE
:
339 status
= MoxaPortRxQueue(ch
);
340 ret
= put_user(status
, (unsigned long __user
*)argp
);
342 case MOXA_GETMSTATUS
: {
343 struct mxser_mstatus __user
*argm
= argp
;
344 struct mxser_mstatus tmp
;
348 for (i
= 0; i
< MAX_BOARDS
; i
++) {
349 p
= moxa_boards
[i
].ports
;
350 for (j
= 0; j
< MAX_PORTS_PER_BOARD
; j
++, p
++, argm
++) {
351 struct tty_struct
*ttyp
;
352 memset(&tmp
, 0, sizeof(tmp
));
353 spin_lock_bh(&moxa_lock
);
354 if (!moxa_boards
[i
].ready
) {
355 spin_unlock_bh(&moxa_lock
);
359 status
= MoxaPortLineStatus(p
);
360 spin_unlock_bh(&moxa_lock
);
369 ttyp
= tty_port_tty_get(&p
->port
);
370 if (!ttyp
|| !ttyp
->termios
)
371 tmp
.cflag
= p
->cflag
;
373 tmp
.cflag
= ttyp
->termios
->c_cflag
;
376 if (copy_to_user(argm
, &tmp
, sizeof(tmp
)))
383 mutex_lock(&ch
->port
.mutex
);
384 ret
= moxa_get_serial_info(ch
, argp
);
385 mutex_unlock(&ch
->port
.mutex
);
388 mutex_lock(&ch
->port
.mutex
);
389 ret
= moxa_set_serial_info(ch
, argp
);
390 mutex_unlock(&ch
->port
.mutex
);
398 static int moxa_break_ctl(struct tty_struct
*tty
, int state
)
400 struct moxa_port
*port
= tty
->driver_data
;
402 moxafunc(port
->tableAddr
, state
? FC_SendBreak
: FC_StopBreak
,
407 static const struct tty_operations moxa_ops
= {
411 .write_room
= moxa_write_room
,
412 .flush_buffer
= moxa_flush_buffer
,
413 .chars_in_buffer
= moxa_chars_in_buffer
,
415 .set_termios
= moxa_set_termios
,
418 .hangup
= moxa_hangup
,
419 .break_ctl
= moxa_break_ctl
,
420 .tiocmget
= moxa_tiocmget
,
421 .tiocmset
= moxa_tiocmset
,
424 static const struct tty_port_operations moxa_port_ops
= {
425 .carrier_raised
= moxa_carrier_raised
,
426 .dtr_rts
= moxa_dtr_rts
,
427 .shutdown
= moxa_shutdown
,
430 static struct tty_driver
*moxaDriver
;
431 static DEFINE_TIMER(moxaTimer
, moxa_poll
, 0, 0);
437 static int moxa_check_fw_model(struct moxa_board_conf
*brd
, u8 model
)
439 switch (brd
->boardType
) {
440 case MOXA_BOARD_C218_ISA
:
441 case MOXA_BOARD_C218_PCI
:
445 case MOXA_BOARD_CP204J
:
459 static int moxa_check_fw(const void *ptr
)
461 const __le16
*lptr
= ptr
;
463 if (*lptr
!= cpu_to_le16(0x7980))
469 static int moxa_load_bios(struct moxa_board_conf
*brd
, const u8
*buf
,
472 void __iomem
*baseAddr
= brd
->basemem
;
475 writeb(HW_reset
, baseAddr
+ Control_reg
); /* reset */
477 memset_io(baseAddr
, 0, 4096);
478 memcpy_toio(baseAddr
, buf
, len
); /* download BIOS */
479 writeb(0, baseAddr
+ Control_reg
); /* restart */
483 switch (brd
->boardType
) {
484 case MOXA_BOARD_C218_ISA
:
485 case MOXA_BOARD_C218_PCI
:
486 tmp
= readw(baseAddr
+ C218_key
);
487 if (tmp
!= C218_KeyCode
)
490 case MOXA_BOARD_CP204J
:
491 tmp
= readw(baseAddr
+ C218_key
);
492 if (tmp
!= CP204J_KeyCode
)
496 tmp
= readw(baseAddr
+ C320_key
);
497 if (tmp
!= C320_KeyCode
)
499 tmp
= readw(baseAddr
+ C320_status
);
500 if (tmp
!= STS_init
) {
501 printk(KERN_ERR
"MOXA: bios upload failed -- CPU/Basic "
502 "module not found\n");
510 printk(KERN_ERR
"MOXA: bios upload failed -- board not found\n");
514 static int moxa_load_320b(struct moxa_board_conf
*brd
, const u8
*ptr
,
517 void __iomem
*baseAddr
= brd
->basemem
;
520 printk(KERN_ERR
"MOXA: invalid 320 bios -- too short\n");
524 writew(len
- 7168 - 2, baseAddr
+ C320bapi_len
);
525 writeb(1, baseAddr
+ Control_reg
); /* Select Page 1 */
526 memcpy_toio(baseAddr
+ DynPage_addr
, ptr
, 7168);
527 writeb(2, baseAddr
+ Control_reg
); /* Select Page 2 */
528 memcpy_toio(baseAddr
+ DynPage_addr
, ptr
+ 7168, len
- 7168);
533 static int moxa_real_load_code(struct moxa_board_conf
*brd
, const void *ptr
,
536 void __iomem
*baseAddr
= brd
->basemem
;
537 const __le16
*uptr
= ptr
;
538 size_t wlen
, len2
, j
;
539 unsigned long key
, loadbuf
, loadlen
, checksum
, checksum_ok
;
540 unsigned int i
, retry
;
543 keycode
= (brd
->boardType
== MOXA_BOARD_CP204J
) ? CP204J_KeyCode
:
546 switch (brd
->boardType
) {
547 case MOXA_BOARD_CP204J
:
548 case MOXA_BOARD_C218_ISA
:
549 case MOXA_BOARD_C218_PCI
:
551 loadbuf
= C218_LoadBuf
;
552 loadlen
= C218DLoad_len
;
553 checksum
= C218check_sum
;
554 checksum_ok
= C218chksum_ok
;
558 keycode
= C320_KeyCode
;
559 loadbuf
= C320_LoadBuf
;
560 loadlen
= C320DLoad_len
;
561 checksum
= C320check_sum
;
562 checksum_ok
= C320chksum_ok
;
568 for (i
= 0; i
< wlen
; i
++)
569 usum
+= le16_to_cpu(uptr
[i
]);
575 len2
= (wlen
> 2048) ? 2048 : wlen
;
577 memcpy_toio(baseAddr
+ loadbuf
, ptr
+ j
, len2
<< 1);
580 writew(len2
, baseAddr
+ loadlen
);
581 writew(0, baseAddr
+ key
);
582 for (i
= 0; i
< 100; i
++) {
583 if (readw(baseAddr
+ key
) == keycode
)
587 if (readw(baseAddr
+ key
) != keycode
)
590 writew(0, baseAddr
+ loadlen
);
591 writew(usum
, baseAddr
+ checksum
);
592 writew(0, baseAddr
+ key
);
593 for (i
= 0; i
< 100; i
++) {
594 if (readw(baseAddr
+ key
) == keycode
)
599 } while ((readb(baseAddr
+ checksum_ok
) != 1) && (retry
< 3));
600 if (readb(baseAddr
+ checksum_ok
) != 1)
603 writew(0, baseAddr
+ key
);
604 for (i
= 0; i
< 600; i
++) {
605 if (readw(baseAddr
+ Magic_no
) == Magic_code
)
609 if (readw(baseAddr
+ Magic_no
) != Magic_code
)
612 if (MOXA_IS_320(brd
)) {
613 if (brd
->busType
== MOXA_BUS_TYPE_PCI
) { /* ASIC board */
614 writew(0x3800, baseAddr
+ TMS320_PORT1
);
615 writew(0x3900, baseAddr
+ TMS320_PORT2
);
616 writew(28499, baseAddr
+ TMS320_CLOCK
);
618 writew(0x3200, baseAddr
+ TMS320_PORT1
);
619 writew(0x3400, baseAddr
+ TMS320_PORT2
);
620 writew(19999, baseAddr
+ TMS320_CLOCK
);
623 writew(1, baseAddr
+ Disable_IRQ
);
624 writew(0, baseAddr
+ Magic_no
);
625 for (i
= 0; i
< 500; i
++) {
626 if (readw(baseAddr
+ Magic_no
) == Magic_code
)
630 if (readw(baseAddr
+ Magic_no
) != Magic_code
)
633 if (MOXA_IS_320(brd
)) {
634 j
= readw(baseAddr
+ Module_cnt
);
637 brd
->numPorts
= j
* 8;
638 writew(j
, baseAddr
+ Module_no
);
639 writew(0, baseAddr
+ Magic_no
);
640 for (i
= 0; i
< 600; i
++) {
641 if (readw(baseAddr
+ Magic_no
) == Magic_code
)
645 if (readw(baseAddr
+ Magic_no
) != Magic_code
)
648 brd
->intNdx
= baseAddr
+ IRQindex
;
649 brd
->intPend
= baseAddr
+ IRQpending
;
650 brd
->intTable
= baseAddr
+ IRQtable
;
655 static int moxa_load_code(struct moxa_board_conf
*brd
, const void *ptr
,
658 void __iomem
*ofsAddr
, *baseAddr
= brd
->basemem
;
659 struct moxa_port
*port
;
663 printk(KERN_ERR
"MOXA: bios length is not even\n");
667 retval
= moxa_real_load_code(brd
, ptr
, len
); /* may change numPorts */
671 switch (brd
->boardType
) {
672 case MOXA_BOARD_C218_ISA
:
673 case MOXA_BOARD_C218_PCI
:
674 case MOXA_BOARD_CP204J
:
676 for (i
= 0; i
< brd
->numPorts
; i
++, port
++) {
679 port
->tableAddr
= baseAddr
+ Extern_table
+
681 ofsAddr
= port
->tableAddr
;
682 writew(C218rx_mask
, ofsAddr
+ RX_mask
);
683 writew(C218tx_mask
, ofsAddr
+ TX_mask
);
684 writew(C218rx_spage
+ i
* C218buf_pageno
, ofsAddr
+ Page_rxb
);
685 writew(readw(ofsAddr
+ Page_rxb
) + C218rx_pageno
, ofsAddr
+ EndPage_rxb
);
687 writew(C218tx_spage
+ i
* C218buf_pageno
, ofsAddr
+ Page_txb
);
688 writew(readw(ofsAddr
+ Page_txb
) + C218tx_pageno
, ofsAddr
+ EndPage_txb
);
694 for (i
= 0; i
< brd
->numPorts
; i
++, port
++) {
697 port
->tableAddr
= baseAddr
+ Extern_table
+
699 ofsAddr
= port
->tableAddr
;
700 switch (brd
->numPorts
) {
702 writew(C320p8rx_mask
, ofsAddr
+ RX_mask
);
703 writew(C320p8tx_mask
, ofsAddr
+ TX_mask
);
704 writew(C320p8rx_spage
+ i
* C320p8buf_pgno
, ofsAddr
+ Page_rxb
);
705 writew(readw(ofsAddr
+ Page_rxb
) + C320p8rx_pgno
, ofsAddr
+ EndPage_rxb
);
706 writew(C320p8tx_spage
+ i
* C320p8buf_pgno
, ofsAddr
+ Page_txb
);
707 writew(readw(ofsAddr
+ Page_txb
) + C320p8tx_pgno
, ofsAddr
+ EndPage_txb
);
711 writew(C320p16rx_mask
, ofsAddr
+ RX_mask
);
712 writew(C320p16tx_mask
, ofsAddr
+ TX_mask
);
713 writew(C320p16rx_spage
+ i
* C320p16buf_pgno
, ofsAddr
+ Page_rxb
);
714 writew(readw(ofsAddr
+ Page_rxb
) + C320p16rx_pgno
, ofsAddr
+ EndPage_rxb
);
715 writew(C320p16tx_spage
+ i
* C320p16buf_pgno
, ofsAddr
+ Page_txb
);
716 writew(readw(ofsAddr
+ Page_txb
) + C320p16tx_pgno
, ofsAddr
+ EndPage_txb
);
720 writew(C320p24rx_mask
, ofsAddr
+ RX_mask
);
721 writew(C320p24tx_mask
, ofsAddr
+ TX_mask
);
722 writew(C320p24rx_spage
+ i
* C320p24buf_pgno
, ofsAddr
+ Page_rxb
);
723 writew(readw(ofsAddr
+ Page_rxb
) + C320p24rx_pgno
, ofsAddr
+ EndPage_rxb
);
724 writew(C320p24tx_spage
+ i
* C320p24buf_pgno
, ofsAddr
+ Page_txb
);
725 writew(readw(ofsAddr
+ Page_txb
), ofsAddr
+ EndPage_txb
);
728 writew(C320p32rx_mask
, ofsAddr
+ RX_mask
);
729 writew(C320p32tx_mask
, ofsAddr
+ TX_mask
);
730 writew(C320p32tx_ofs
, ofsAddr
+ Ofs_txb
);
731 writew(C320p32rx_spage
+ i
* C320p32buf_pgno
, ofsAddr
+ Page_rxb
);
732 writew(readb(ofsAddr
+ Page_rxb
), ofsAddr
+ EndPage_rxb
);
733 writew(C320p32tx_spage
+ i
* C320p32buf_pgno
, ofsAddr
+ Page_txb
);
734 writew(readw(ofsAddr
+ Page_txb
), ofsAddr
+ EndPage_txb
);
743 static int moxa_load_fw(struct moxa_board_conf
*brd
, const struct firmware
*fw
)
745 const void *ptr
= fw
->data
;
749 unsigned int a
, lenp
, lencnt
;
752 __le32 magic
; /* 0x34303430 */
754 u8 type
; /* UNIX = 3 */
755 u8 model
; /* C218T=1, C320T=2, CP204=3 */
760 BUILD_BUG_ON(ARRAY_SIZE(hdr
->len
) != ARRAY_SIZE(lens
));
762 if (fw
->size
< MOXA_FW_HDRLEN
) {
763 strcpy(rsn
, "too short (even header won't fit)");
766 if (hdr
->magic
!= cpu_to_le32(0x30343034)) {
767 sprintf(rsn
, "bad magic: %.8x", le32_to_cpu(hdr
->magic
));
770 if (hdr
->type
!= 3) {
771 sprintf(rsn
, "not for linux, type is %u", hdr
->type
);
774 if (moxa_check_fw_model(brd
, hdr
->model
)) {
775 sprintf(rsn
, "not for this card, model is %u", hdr
->model
);
779 len
= MOXA_FW_HDRLEN
;
780 lencnt
= hdr
->model
== 2 ? 5 : 3;
781 for (a
= 0; a
< ARRAY_SIZE(lens
); a
++) {
782 lens
[a
] = le16_to_cpu(hdr
->len
[a
]);
783 if (lens
[a
] && len
+ lens
[a
] <= fw
->size
&&
784 moxa_check_fw(&fw
->data
[len
]))
785 printk(KERN_WARNING
"MOXA firmware: unexpected input "
786 "at offset %u, but going on\n", (u32
)len
);
787 if (!lens
[a
] && a
< lencnt
) {
788 sprintf(rsn
, "too few entries in fw file");
794 if (len
!= fw
->size
) {
795 sprintf(rsn
, "bad length: %u (should be %u)", (u32
)fw
->size
,
800 ptr
+= MOXA_FW_HDRLEN
;
803 strcpy(rsn
, "read above");
805 ret
= moxa_load_bios(brd
, ptr
, lens
[lenp
]);
809 /* we skip the tty section (lens[1]), since we don't need it */
810 ptr
+= lens
[lenp
] + lens
[lenp
+ 1];
811 lenp
+= 2; /* comm */
813 if (hdr
->model
== 2) {
814 ret
= moxa_load_320b(brd
, ptr
, lens
[lenp
]);
817 /* skip another tty */
818 ptr
+= lens
[lenp
] + lens
[lenp
+ 1];
822 ret
= moxa_load_code(brd
, ptr
, lens
[lenp
]);
828 printk(KERN_ERR
"firmware failed to load, reason: %s\n", rsn
);
832 static int moxa_init_board(struct moxa_board_conf
*brd
, struct device
*dev
)
834 const struct firmware
*fw
;
840 brd
->ports
= kcalloc(MAX_PORTS_PER_BOARD
, sizeof(*brd
->ports
),
842 if (brd
->ports
== NULL
) {
843 printk(KERN_ERR
"cannot allocate memory for ports\n");
848 for (i
= 0, p
= brd
->ports
; i
< MAX_PORTS_PER_BOARD
; i
++, p
++) {
849 tty_port_init(&p
->port
);
850 p
->port
.ops
= &moxa_port_ops
;
851 p
->type
= PORT_16550A
;
852 p
->cflag
= B9600
| CS8
| CREAD
| CLOCAL
| HUPCL
;
855 switch (brd
->boardType
) {
856 case MOXA_BOARD_C218_ISA
:
857 case MOXA_BOARD_C218_PCI
:
858 file
= "c218tunx.cod";
860 case MOXA_BOARD_CP204J
:
861 file
= "cp204unx.cod";
864 file
= "c320tunx.cod";
868 ret
= request_firmware(&fw
, file
, dev
);
870 printk(KERN_ERR
"MOXA: request_firmware failed. Make sure "
871 "you've placed '%s' file into your firmware "
872 "loader directory (e.g. /lib/firmware)\n",
877 ret
= moxa_load_fw(brd
, fw
);
879 release_firmware(fw
);
884 spin_lock_bh(&moxa_lock
);
886 if (!timer_pending(&moxaTimer
))
887 mod_timer(&moxaTimer
, jiffies
+ HZ
/ 50);
888 spin_unlock_bh(&moxa_lock
);
897 static void moxa_board_deinit(struct moxa_board_conf
*brd
)
899 unsigned int a
, opened
;
901 mutex_lock(&moxa_openlock
);
902 spin_lock_bh(&moxa_lock
);
904 spin_unlock_bh(&moxa_lock
);
906 /* pci hot-un-plug support */
907 for (a
= 0; a
< brd
->numPorts
; a
++)
908 if (brd
->ports
[a
].port
.flags
& ASYNC_INITIALIZED
) {
909 struct tty_struct
*tty
= tty_port_tty_get(
910 &brd
->ports
[a
].port
);
918 for (a
= 0; a
< brd
->numPorts
; a
++)
919 if (brd
->ports
[a
].port
.flags
& ASYNC_INITIALIZED
)
921 mutex_unlock(&moxa_openlock
);
925 mutex_lock(&moxa_openlock
);
928 iounmap(brd
->basemem
);
934 static int __devinit
moxa_pci_probe(struct pci_dev
*pdev
,
935 const struct pci_device_id
*ent
)
937 struct moxa_board_conf
*board
;
939 int board_type
= ent
->driver_data
;
942 retval
= pci_enable_device(pdev
);
944 dev_err(&pdev
->dev
, "can't enable pci device\n");
948 for (i
= 0; i
< MAX_BOARDS
; i
++)
949 if (moxa_boards
[i
].basemem
== NULL
)
953 if (i
>= MAX_BOARDS
) {
954 dev_warn(&pdev
->dev
, "more than %u MOXA Intellio family boards "
955 "found. Board is ignored.\n", MAX_BOARDS
);
959 board
= &moxa_boards
[i
];
961 retval
= pci_request_region(pdev
, 2, "moxa-base");
963 dev_err(&pdev
->dev
, "can't request pci region 2\n");
967 board
->basemem
= ioremap_nocache(pci_resource_start(pdev
, 2), 0x4000);
968 if (board
->basemem
== NULL
) {
969 dev_err(&pdev
->dev
, "can't remap io space 2\n");
973 board
->boardType
= board_type
;
974 switch (board_type
) {
975 case MOXA_BOARD_C218_ISA
:
976 case MOXA_BOARD_C218_PCI
:
980 case MOXA_BOARD_CP204J
:
987 board
->busType
= MOXA_BUS_TYPE_PCI
;
989 retval
= moxa_init_board(board
, &pdev
->dev
);
993 pci_set_drvdata(pdev
, board
);
995 dev_info(&pdev
->dev
, "board '%s' ready (%u ports, firmware loaded)\n",
996 moxa_brdname
[board_type
- 1], board
->numPorts
);
1000 iounmap(board
->basemem
);
1001 board
->basemem
= NULL
;
1003 pci_release_region(pdev
, 2);
1008 static void __devexit
moxa_pci_remove(struct pci_dev
*pdev
)
1010 struct moxa_board_conf
*brd
= pci_get_drvdata(pdev
);
1012 moxa_board_deinit(brd
);
1014 pci_release_region(pdev
, 2);
1017 static struct pci_driver moxa_pci_driver
= {
1019 .id_table
= moxa_pcibrds
,
1020 .probe
= moxa_pci_probe
,
1021 .remove
= __devexit_p(moxa_pci_remove
)
1023 #endif /* CONFIG_PCI */
1025 static int __init
moxa_init(void)
1027 unsigned int isabrds
= 0;
1029 struct moxa_board_conf
*brd
= moxa_boards
;
1032 printk(KERN_INFO
"MOXA Intellio family driver version %s\n",
1034 moxaDriver
= alloc_tty_driver(MAX_PORTS
+ 1);
1038 moxaDriver
->owner
= THIS_MODULE
;
1039 moxaDriver
->name
= "ttyMX";
1040 moxaDriver
->major
= ttymajor
;
1041 moxaDriver
->minor_start
= 0;
1042 moxaDriver
->type
= TTY_DRIVER_TYPE_SERIAL
;
1043 moxaDriver
->subtype
= SERIAL_TYPE_NORMAL
;
1044 moxaDriver
->init_termios
= tty_std_termios
;
1045 moxaDriver
->init_termios
.c_cflag
= B9600
| CS8
| CREAD
| CLOCAL
| HUPCL
;
1046 moxaDriver
->init_termios
.c_ispeed
= 9600;
1047 moxaDriver
->init_termios
.c_ospeed
= 9600;
1048 moxaDriver
->flags
= TTY_DRIVER_REAL_RAW
;
1049 tty_set_operations(moxaDriver
, &moxa_ops
);
1051 if (tty_register_driver(moxaDriver
)) {
1052 printk(KERN_ERR
"can't register MOXA Smartio tty driver!\n");
1053 put_tty_driver(moxaDriver
);
1057 /* Find the boards defined from module args. */
1059 for (i
= 0; i
< MAX_BOARDS
; i
++) {
1062 if (type
[i
] == MOXA_BOARD_C218_ISA
||
1063 type
[i
] == MOXA_BOARD_C320_ISA
) {
1064 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
1065 isabrds
+ 1, moxa_brdname
[type
[i
] - 1],
1067 brd
->boardType
= type
[i
];
1068 brd
->numPorts
= type
[i
] == MOXA_BOARD_C218_ISA
? 8 :
1070 brd
->busType
= MOXA_BUS_TYPE_ISA
;
1071 brd
->basemem
= ioremap_nocache(baseaddr
[i
], 0x4000);
1072 if (!brd
->basemem
) {
1073 printk(KERN_ERR
"MOXA: can't remap %lx\n",
1077 if (moxa_init_board(brd
, NULL
)) {
1078 iounmap(brd
->basemem
);
1079 brd
->basemem
= NULL
;
1083 printk(KERN_INFO
"MOXA isa board found at 0x%.8lu and "
1084 "ready (%u ports, firmware loaded)\n",
1085 baseaddr
[i
], brd
->numPorts
);
1093 retval
= pci_register_driver(&moxa_pci_driver
);
1095 printk(KERN_ERR
"Can't register MOXA pci driver!\n");
1104 static void __exit
moxa_exit(void)
1109 pci_unregister_driver(&moxa_pci_driver
);
1112 for (i
= 0; i
< MAX_BOARDS
; i
++) /* ISA boards */
1113 if (moxa_boards
[i
].ready
)
1114 moxa_board_deinit(&moxa_boards
[i
]);
1116 del_timer_sync(&moxaTimer
);
1118 if (tty_unregister_driver(moxaDriver
))
1119 printk(KERN_ERR
"Couldn't unregister MOXA Intellio family "
1121 put_tty_driver(moxaDriver
);
1124 module_init(moxa_init
);
1125 module_exit(moxa_exit
);
1127 static void moxa_shutdown(struct tty_port
*port
)
1129 struct moxa_port
*ch
= container_of(port
, struct moxa_port
, port
);
1130 MoxaPortDisable(ch
);
1131 MoxaPortFlushData(ch
, 2);
1134 static int moxa_carrier_raised(struct tty_port
*port
)
1136 struct moxa_port
*ch
= container_of(port
, struct moxa_port
, port
);
1139 spin_lock_irq(&port
->lock
);
1141 spin_unlock_irq(&port
->lock
);
1145 static void moxa_dtr_rts(struct tty_port
*port
, int onoff
)
1147 struct moxa_port
*ch
= container_of(port
, struct moxa_port
, port
);
1148 MoxaPortLineCtrl(ch
, onoff
, onoff
);
1152 static int moxa_open(struct tty_struct
*tty
, struct file
*filp
)
1154 struct moxa_board_conf
*brd
;
1155 struct moxa_port
*ch
;
1159 if (port
== MAX_PORTS
) {
1160 return capable(CAP_SYS_ADMIN
) ? 0 : -EPERM
;
1162 if (mutex_lock_interruptible(&moxa_openlock
))
1163 return -ERESTARTSYS
;
1164 brd
= &moxa_boards
[port
/ MAX_PORTS_PER_BOARD
];
1166 mutex_unlock(&moxa_openlock
);
1170 if (port
% MAX_PORTS_PER_BOARD
>= brd
->numPorts
) {
1171 mutex_unlock(&moxa_openlock
);
1175 ch
= &brd
->ports
[port
% MAX_PORTS_PER_BOARD
];
1177 tty
->driver_data
= ch
;
1178 tty_port_tty_set(&ch
->port
, tty
);
1179 mutex_lock(&ch
->port
.mutex
);
1180 if (!(ch
->port
.flags
& ASYNC_INITIALIZED
)) {
1181 ch
->statusflags
= 0;
1182 moxa_set_tty_param(tty
, tty
->termios
);
1183 MoxaPortLineCtrl(ch
, 1, 1);
1185 MoxaSetFifo(ch
, ch
->type
== PORT_16550A
);
1186 ch
->port
.flags
|= ASYNC_INITIALIZED
;
1188 mutex_unlock(&ch
->port
.mutex
);
1189 mutex_unlock(&moxa_openlock
);
1191 return tty_port_block_til_ready(&ch
->port
, tty
, filp
);
1194 static void moxa_close(struct tty_struct
*tty
, struct file
*filp
)
1196 struct moxa_port
*ch
= tty
->driver_data
;
1197 ch
->cflag
= tty
->termios
->c_cflag
;
1198 tty_port_close(&ch
->port
, tty
, filp
);
1201 static int moxa_write(struct tty_struct
*tty
,
1202 const unsigned char *buf
, int count
)
1204 struct moxa_port
*ch
= tty
->driver_data
;
1205 unsigned long flags
;
1211 spin_lock_irqsave(&moxa_lock
, flags
);
1212 len
= MoxaPortWriteData(tty
, buf
, count
);
1213 spin_unlock_irqrestore(&moxa_lock
, flags
);
1215 set_bit(LOWWAIT
, &ch
->statusflags
);
1219 static int moxa_write_room(struct tty_struct
*tty
)
1221 struct moxa_port
*ch
;
1225 ch
= tty
->driver_data
;
1228 return MoxaPortTxFree(ch
);
1231 static void moxa_flush_buffer(struct tty_struct
*tty
)
1233 struct moxa_port
*ch
= tty
->driver_data
;
1237 MoxaPortFlushData(ch
, 1);
1241 static int moxa_chars_in_buffer(struct tty_struct
*tty
)
1243 struct moxa_port
*ch
= tty
->driver_data
;
1246 chars
= MoxaPortTxQueue(ch
);
1249 * Make it possible to wakeup anything waiting for output
1250 * in tty_ioctl.c, etc.
1252 set_bit(EMPTYWAIT
, &ch
->statusflags
);
1256 static int moxa_tiocmget(struct tty_struct
*tty
)
1258 struct moxa_port
*ch
= tty
->driver_data
;
1259 int flag
= 0, dtr
, rts
;
1261 MoxaPortGetLineOut(ch
, &dtr
, &rts
);
1266 dtr
= MoxaPortLineStatus(ch
);
1276 static int moxa_tiocmset(struct tty_struct
*tty
,
1277 unsigned int set
, unsigned int clear
)
1279 struct moxa_port
*ch
;
1282 mutex_lock(&moxa_openlock
);
1283 ch
= tty
->driver_data
;
1285 mutex_unlock(&moxa_openlock
);
1289 MoxaPortGetLineOut(ch
, &dtr
, &rts
);
1290 if (set
& TIOCM_RTS
)
1292 if (set
& TIOCM_DTR
)
1294 if (clear
& TIOCM_RTS
)
1296 if (clear
& TIOCM_DTR
)
1298 MoxaPortLineCtrl(ch
, dtr
, rts
);
1299 mutex_unlock(&moxa_openlock
);
1303 static void moxa_set_termios(struct tty_struct
*tty
,
1304 struct ktermios
*old_termios
)
1306 struct moxa_port
*ch
= tty
->driver_data
;
1310 moxa_set_tty_param(tty
, old_termios
);
1311 if (!(old_termios
->c_cflag
& CLOCAL
) && C_CLOCAL(tty
))
1312 wake_up_interruptible(&ch
->port
.open_wait
);
1315 static void moxa_stop(struct tty_struct
*tty
)
1317 struct moxa_port
*ch
= tty
->driver_data
;
1321 MoxaPortTxDisable(ch
);
1322 set_bit(TXSTOPPED
, &ch
->statusflags
);
1326 static void moxa_start(struct tty_struct
*tty
)
1328 struct moxa_port
*ch
= tty
->driver_data
;
1333 if (!(ch
->statusflags
& TXSTOPPED
))
1336 MoxaPortTxEnable(ch
);
1337 clear_bit(TXSTOPPED
, &ch
->statusflags
);
1340 static void moxa_hangup(struct tty_struct
*tty
)
1342 struct moxa_port
*ch
= tty
->driver_data
;
1343 tty_port_hangup(&ch
->port
);
1346 static void moxa_new_dcdstate(struct moxa_port
*p
, u8 dcd
)
1348 struct tty_struct
*tty
;
1349 unsigned long flags
;
1352 spin_lock_irqsave(&p
->port
.lock
, flags
);
1353 if (dcd
!= p
->DCDState
) {
1355 spin_unlock_irqrestore(&p
->port
.lock
, flags
);
1356 tty
= tty_port_tty_get(&p
->port
);
1357 if (tty
&& C_CLOCAL(tty
) && !dcd
)
1362 spin_unlock_irqrestore(&p
->port
.lock
, flags
);
1365 static int moxa_poll_port(struct moxa_port
*p
, unsigned int handle
,
1368 struct tty_struct
*tty
= tty_port_tty_get(&p
->port
);
1369 void __iomem
*ofsAddr
;
1370 unsigned int inited
= p
->port
.flags
& ASYNC_INITIALIZED
;
1374 if (test_bit(EMPTYWAIT
, &p
->statusflags
) &&
1375 MoxaPortTxQueue(p
) == 0) {
1376 clear_bit(EMPTYWAIT
, &p
->statusflags
);
1379 if (test_bit(LOWWAIT
, &p
->statusflags
) && !tty
->stopped
&&
1380 MoxaPortTxQueue(p
) <= WAKEUP_CHARS
) {
1381 clear_bit(LOWWAIT
, &p
->statusflags
);
1385 if (inited
&& !test_bit(TTY_THROTTLED
, &tty
->flags
) &&
1386 MoxaPortRxQueue(p
) > 0) { /* RX */
1387 MoxaPortReadData(p
);
1388 tty_schedule_flip(tty
);
1391 clear_bit(EMPTYWAIT
, &p
->statusflags
);
1392 MoxaPortFlushData(p
, 0); /* flush RX */
1395 if (!handle
) /* nothing else to do */
1398 intr
= readw(ip
); /* port irq status */
1402 writew(0, ip
); /* ACK port */
1403 ofsAddr
= p
->tableAddr
;
1404 if (intr
& IntrTx
) /* disable tx intr */
1405 writew(readw(ofsAddr
+ HostStat
) & ~WakeupTx
,
1406 ofsAddr
+ HostStat
);
1411 if (tty
&& (intr
& IntrBreak
) && !I_IGNBRK(tty
)) { /* BREAK */
1412 tty_insert_flip_char(tty
, 0, TTY_BREAK
);
1413 tty_schedule_flip(tty
);
1416 if (intr
& IntrLine
)
1417 moxa_new_dcdstate(p
, readb(ofsAddr
+ FlagStat
) & DCD_state
);
1424 static void moxa_poll(unsigned long ignored
)
1426 struct moxa_board_conf
*brd
;
1428 unsigned int card
, port
, served
= 0;
1430 spin_lock(&moxa_lock
);
1431 for (card
= 0; card
< MAX_BOARDS
; card
++) {
1432 brd
= &moxa_boards
[card
];
1439 if (readb(brd
->intPend
) == 0xff)
1440 ip
= brd
->intTable
+ readb(brd
->intNdx
);
1442 for (port
= 0; port
< brd
->numPorts
; port
++)
1443 moxa_poll_port(&brd
->ports
[port
], !!ip
, ip
+ port
);
1446 writeb(0, brd
->intPend
); /* ACK */
1448 if (moxaLowWaterChk
) {
1449 struct moxa_port
*p
= brd
->ports
;
1450 for (port
= 0; port
< brd
->numPorts
; port
++, p
++)
1451 if (p
->lowChkFlag
) {
1453 moxa_low_water_check(p
->tableAddr
);
1457 moxaLowWaterChk
= 0;
1460 mod_timer(&moxaTimer
, jiffies
+ HZ
/ 50);
1461 spin_unlock(&moxa_lock
);
1464 /******************************************************************************/
1466 static void moxa_set_tty_param(struct tty_struct
*tty
, struct ktermios
*old_termios
)
1468 register struct ktermios
*ts
= tty
->termios
;
1469 struct moxa_port
*ch
= tty
->driver_data
;
1470 int rts
, cts
, txflow
, rxflow
, xany
, baud
;
1472 rts
= cts
= txflow
= rxflow
= xany
= 0;
1473 if (ts
->c_cflag
& CRTSCTS
)
1475 if (ts
->c_iflag
& IXON
)
1477 if (ts
->c_iflag
& IXOFF
)
1479 if (ts
->c_iflag
& IXANY
)
1482 /* Clear the features we don't support */
1483 ts
->c_cflag
&= ~CMSPAR
;
1484 MoxaPortFlowCtrl(ch
, rts
, cts
, txflow
, rxflow
, xany
);
1485 baud
= MoxaPortSetTermio(ch
, ts
, tty_get_baud_rate(tty
));
1487 baud
= tty_termios_baud_rate(old_termios
);
1488 /* Not put the baud rate into the termios data */
1489 tty_encode_baud_rate(tty
, baud
, baud
);
1492 /*****************************************************************************
1493 * Driver level functions: *
1494 *****************************************************************************/
1496 static void MoxaPortFlushData(struct moxa_port
*port
, int mode
)
1498 void __iomem
*ofsAddr
;
1499 if (mode
< 0 || mode
> 2)
1501 ofsAddr
= port
->tableAddr
;
1502 moxafunc(ofsAddr
, FC_FlushQueue
, mode
);
1504 port
->lowChkFlag
= 0;
1505 moxa_low_water_check(ofsAddr
);
1510 * Moxa Port Number Description:
1512 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
1513 * the port number using in MOXA driver functions will be 0 to 31 for
1514 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
1515 * to 127 for fourth. For example, if you setup three MOXA boards,
1516 * first board is C218, second board is C320-16 and third board is
1517 * C320-32. The port number of first board (C218 - 8 ports) is from
1518 * 0 to 7. The port number of second board (C320 - 16 ports) is form
1519 * 32 to 47. The port number of third board (C320 - 32 ports) is from
1520 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
1521 * 127 will be invalid.
1524 * Moxa Functions Description:
1526 * Function 1: Driver initialization routine, this routine must be
1527 * called when initialized driver.
1529 * void MoxaDriverInit();
1532 * Function 2: Moxa driver private IOCTL command processing.
1534 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
1536 * unsigned int cmd : IOCTL command
1537 * unsigned long arg : IOCTL argument
1538 * int port : port number (0 - 127)
1545 * Function 6: Enable this port to start Tx/Rx data.
1547 * void MoxaPortEnable(int port);
1548 * int port : port number (0 - 127)
1551 * Function 7: Disable this port
1553 * void MoxaPortDisable(int port);
1554 * int port : port number (0 - 127)
1557 * Function 10: Setting baud rate of this port.
1559 * speed_t MoxaPortSetBaud(int port, speed_t baud);
1560 * int port : port number (0 - 127)
1561 * long baud : baud rate (50 - 115200)
1563 * return: 0 : this port is invalid or baud < 50
1564 * 50 - 115200 : the real baud rate set to the port, if
1565 * the argument baud is large than maximun
1566 * available baud rate, the real setting
1567 * baud rate will be the maximun baud rate.
1570 * Function 12: Configure the port.
1572 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
1573 * int port : port number (0 - 127)
1574 * struct ktermios * termio : termio structure pointer
1575 * speed_t baud : baud rate
1577 * return: -1 : this port is invalid or termio == NULL
1581 * Function 13: Get the DTR/RTS state of this port.
1583 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
1584 * int port : port number (0 - 127)
1585 * int * dtrState : pointer to INT to receive the current DTR
1586 * state. (if NULL, this function will not
1587 * write to this address)
1588 * int * rtsState : pointer to INT to receive the current RTS
1589 * state. (if NULL, this function will not
1590 * write to this address)
1592 * return: -1 : this port is invalid
1596 * Function 14: Setting the DTR/RTS output state of this port.
1598 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
1599 * int port : port number (0 - 127)
1600 * int dtrState : DTR output state (0: off, 1: on)
1601 * int rtsState : RTS output state (0: off, 1: on)
1604 * Function 15: Setting the flow control of this port.
1606 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
1607 * int txFlow,int xany);
1608 * int port : port number (0 - 127)
1609 * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
1610 * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
1611 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
1612 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
1613 * int xany : S/W XANY flow control (0: no, 1: yes)
1616 * Function 16: Get ths line status of this port
1618 * int MoxaPortLineStatus(int port);
1619 * int port : port number (0 - 127)
1621 * return: Bit 0 - CTS state (0: off, 1: on)
1622 * Bit 1 - DSR state (0: off, 1: on)
1623 * Bit 2 - DCD state (0: off, 1: on)
1626 * Function 19: Flush the Rx/Tx buffer data of this port.
1628 * void MoxaPortFlushData(int port, int mode);
1629 * int port : port number (0 - 127)
1631 * 0 : flush the Rx buffer
1632 * 1 : flush the Tx buffer
1633 * 2 : flush the Rx and Tx buffer
1636 * Function 20: Write data.
1638 * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
1639 * int port : port number (0 - 127)
1640 * unsigned char * buffer : pointer to write data buffer.
1641 * int length : write data length
1643 * return: 0 - length : real write data length
1646 * Function 21: Read data.
1648 * int MoxaPortReadData(int port, struct tty_struct *tty);
1649 * int port : port number (0 - 127)
1650 * struct tty_struct *tty : tty for data
1652 * return: 0 - length : real read data length
1655 * Function 24: Get the Tx buffer current queued data bytes
1657 * int MoxaPortTxQueue(int port);
1658 * int port : port number (0 - 127)
1660 * return: .. : Tx buffer current queued data bytes
1663 * Function 25: Get the Tx buffer current free space
1665 * int MoxaPortTxFree(int port);
1666 * int port : port number (0 - 127)
1668 * return: .. : Tx buffer current free space
1671 * Function 26: Get the Rx buffer current queued data bytes
1673 * int MoxaPortRxQueue(int port);
1674 * int port : port number (0 - 127)
1676 * return: .. : Rx buffer current queued data bytes
1679 * Function 28: Disable port data transmission.
1681 * void MoxaPortTxDisable(int port);
1682 * int port : port number (0 - 127)
1685 * Function 29: Enable port data transmission.
1687 * void MoxaPortTxEnable(int port);
1688 * int port : port number (0 - 127)
1691 * Function 31: Get the received BREAK signal count and reset it.
1693 * int MoxaPortResetBrkCnt(int port);
1694 * int port : port number (0 - 127)
1696 * return: 0 - .. : BREAK signal count
1701 static void MoxaPortEnable(struct moxa_port
*port
)
1703 void __iomem
*ofsAddr
;
1706 ofsAddr
= port
->tableAddr
;
1707 writew(lowwater
, ofsAddr
+ Low_water
);
1708 if (MOXA_IS_320(port
->board
))
1709 moxafunc(ofsAddr
, FC_SetBreakIrq
, 0);
1711 writew(readw(ofsAddr
+ HostStat
) | WakeupBreak
,
1712 ofsAddr
+ HostStat
);
1714 moxafunc(ofsAddr
, FC_SetLineIrq
, Magic_code
);
1715 moxafunc(ofsAddr
, FC_FlushQueue
, 2);
1717 moxafunc(ofsAddr
, FC_EnableCH
, Magic_code
);
1718 MoxaPortLineStatus(port
);
1721 static void MoxaPortDisable(struct moxa_port
*port
)
1723 void __iomem
*ofsAddr
= port
->tableAddr
;
1725 moxafunc(ofsAddr
, FC_SetFlowCtl
, 0); /* disable flow control */
1726 moxafunc(ofsAddr
, FC_ClrLineIrq
, Magic_code
);
1727 writew(0, ofsAddr
+ HostStat
);
1728 moxafunc(ofsAddr
, FC_DisableCH
, Magic_code
);
1731 static speed_t
MoxaPortSetBaud(struct moxa_port
*port
, speed_t baud
)
1733 void __iomem
*ofsAddr
= port
->tableAddr
;
1734 unsigned int clock
, val
;
1737 max
= MOXA_IS_320(port
->board
) ? 460800 : 921600;
1744 moxafunc(ofsAddr
, FC_SetBaud
, val
);
1749 static int MoxaPortSetTermio(struct moxa_port
*port
, struct ktermios
*termio
,
1752 void __iomem
*ofsAddr
;
1755 ofsAddr
= port
->tableAddr
;
1757 mode
= termio
->c_cflag
& CSIZE
;
1760 else if (mode
== CS6
)
1762 else if (mode
== CS7
)
1764 else if (mode
== CS8
)
1767 if (termio
->c_cflag
& CSTOPB
) {
1775 if (termio
->c_cflag
& PARENB
) {
1776 if (termio
->c_cflag
& PARODD
)
1783 moxafunc(ofsAddr
, FC_SetDataMode
, (u16
)mode
);
1785 if (MOXA_IS_320(port
->board
) && baud
>= 921600)
1788 baud
= MoxaPortSetBaud(port
, baud
);
1790 if (termio
->c_iflag
& (IXON
| IXOFF
| IXANY
)) {
1791 spin_lock_irq(&moxafunc_lock
);
1792 writeb(termio
->c_cc
[VSTART
], ofsAddr
+ FuncArg
);
1793 writeb(termio
->c_cc
[VSTOP
], ofsAddr
+ FuncArg1
);
1794 writeb(FC_SetXonXoff
, ofsAddr
+ FuncCode
);
1795 moxa_wait_finish(ofsAddr
);
1796 spin_unlock_irq(&moxafunc_lock
);
1802 static int MoxaPortGetLineOut(struct moxa_port
*port
, int *dtrState
,
1806 *dtrState
= !!(port
->lineCtrl
& DTR_ON
);
1808 *rtsState
= !!(port
->lineCtrl
& RTS_ON
);
1813 static void MoxaPortLineCtrl(struct moxa_port
*port
, int dtr
, int rts
)
1821 port
->lineCtrl
= mode
;
1822 moxafunc(port
->tableAddr
, FC_LineControl
, mode
);
1825 static void MoxaPortFlowCtrl(struct moxa_port
*port
, int rts
, int cts
,
1826 int txflow
, int rxflow
, int txany
)
1831 mode
|= RTS_FlowCtl
;
1833 mode
|= CTS_FlowCtl
;
1840 moxafunc(port
->tableAddr
, FC_SetFlowCtl
, mode
);
1843 static int MoxaPortLineStatus(struct moxa_port
*port
)
1845 void __iomem
*ofsAddr
;
1848 ofsAddr
= port
->tableAddr
;
1849 if (MOXA_IS_320(port
->board
))
1850 val
= moxafuncret(ofsAddr
, FC_LineStatus
, 0);
1852 val
= readw(ofsAddr
+ FlagStat
) >> 4;
1856 moxa_new_dcdstate(port
, val
& 8);
1861 static int MoxaPortWriteData(struct tty_struct
*tty
,
1862 const unsigned char *buffer
, int len
)
1864 struct moxa_port
*port
= tty
->driver_data
;
1865 void __iomem
*baseAddr
, *ofsAddr
, *ofs
;
1866 unsigned int c
, total
;
1867 u16 head
, tail
, tx_mask
, spage
, epage
;
1868 u16 pageno
, pageofs
, bufhead
;
1870 ofsAddr
= port
->tableAddr
;
1871 baseAddr
= port
->board
->basemem
;
1872 tx_mask
= readw(ofsAddr
+ TX_mask
);
1873 spage
= readw(ofsAddr
+ Page_txb
);
1874 epage
= readw(ofsAddr
+ EndPage_txb
);
1875 tail
= readw(ofsAddr
+ TXwptr
);
1876 head
= readw(ofsAddr
+ TXrptr
);
1877 c
= (head
> tail
) ? (head
- tail
- 1) : (head
- tail
+ tx_mask
);
1880 moxaLog
.txcnt
[port
->port
.tty
->index
] += c
;
1882 if (spage
== epage
) {
1883 bufhead
= readw(ofsAddr
+ Ofs_txb
);
1884 writew(spage
, baseAddr
+ Control_reg
);
1887 len
= head
- tail
- 1;
1889 len
= tx_mask
+ 1 - tail
;
1890 len
= (c
> len
) ? len
: c
;
1891 ofs
= baseAddr
+ DynPage_addr
+ bufhead
+ tail
;
1892 memcpy_toio(ofs
, buffer
, len
);
1894 tail
= (tail
+ len
) & tx_mask
;
1898 pageno
= spage
+ (tail
>> 13);
1899 pageofs
= tail
& Page_mask
;
1901 len
= Page_size
- pageofs
;
1904 writeb(pageno
, baseAddr
+ Control_reg
);
1905 ofs
= baseAddr
+ DynPage_addr
+ pageofs
;
1906 memcpy_toio(ofs
, buffer
, len
);
1908 if (++pageno
== epage
)
1913 tail
= (tail
+ total
) & tx_mask
;
1915 writew(tail
, ofsAddr
+ TXwptr
);
1916 writeb(1, ofsAddr
+ CD180TXirq
); /* start to send */
1920 static int MoxaPortReadData(struct moxa_port
*port
)
1922 struct tty_struct
*tty
= port
->port
.tty
;
1924 void __iomem
*baseAddr
, *ofsAddr
, *ofs
;
1925 unsigned int count
, len
, total
;
1926 u16 tail
, rx_mask
, spage
, epage
;
1927 u16 pageno
, pageofs
, bufhead
, head
;
1929 ofsAddr
= port
->tableAddr
;
1930 baseAddr
= port
->board
->basemem
;
1931 head
= readw(ofsAddr
+ RXrptr
);
1932 tail
= readw(ofsAddr
+ RXwptr
);
1933 rx_mask
= readw(ofsAddr
+ RX_mask
);
1934 spage
= readw(ofsAddr
+ Page_rxb
);
1935 epage
= readw(ofsAddr
+ EndPage_rxb
);
1936 count
= (tail
>= head
) ? (tail
- head
) : (tail
- head
+ rx_mask
+ 1);
1941 moxaLog
.rxcnt
[tty
->index
] += total
;
1942 if (spage
== epage
) {
1943 bufhead
= readw(ofsAddr
+ Ofs_rxb
);
1944 writew(spage
, baseAddr
+ Control_reg
);
1946 ofs
= baseAddr
+ DynPage_addr
+ bufhead
+ head
;
1947 len
= (tail
>= head
) ? (tail
- head
) :
1948 (rx_mask
+ 1 - head
);
1949 len
= tty_prepare_flip_string(tty
, &dst
,
1951 memcpy_fromio(dst
, ofs
, len
);
1952 head
= (head
+ len
) & rx_mask
;
1956 pageno
= spage
+ (head
>> 13);
1957 pageofs
= head
& Page_mask
;
1959 writew(pageno
, baseAddr
+ Control_reg
);
1960 ofs
= baseAddr
+ DynPage_addr
+ pageofs
;
1961 len
= tty_prepare_flip_string(tty
, &dst
,
1962 min(Page_size
- pageofs
, count
));
1963 memcpy_fromio(dst
, ofs
, len
);
1966 pageofs
= (pageofs
+ len
) & Page_mask
;
1967 if (pageofs
== 0 && ++pageno
== epage
)
1970 head
= (head
+ total
) & rx_mask
;
1972 writew(head
, ofsAddr
+ RXrptr
);
1973 if (readb(ofsAddr
+ FlagStat
) & Xoff_state
) {
1974 moxaLowWaterChk
= 1;
1975 port
->lowChkFlag
= 1;
1981 static int MoxaPortTxQueue(struct moxa_port
*port
)
1983 void __iomem
*ofsAddr
= port
->tableAddr
;
1984 u16 rptr
, wptr
, mask
;
1986 rptr
= readw(ofsAddr
+ TXrptr
);
1987 wptr
= readw(ofsAddr
+ TXwptr
);
1988 mask
= readw(ofsAddr
+ TX_mask
);
1989 return (wptr
- rptr
) & mask
;
1992 static int MoxaPortTxFree(struct moxa_port
*port
)
1994 void __iomem
*ofsAddr
= port
->tableAddr
;
1995 u16 rptr
, wptr
, mask
;
1997 rptr
= readw(ofsAddr
+ TXrptr
);
1998 wptr
= readw(ofsAddr
+ TXwptr
);
1999 mask
= readw(ofsAddr
+ TX_mask
);
2000 return mask
- ((wptr
- rptr
) & mask
);
2003 static int MoxaPortRxQueue(struct moxa_port
*port
)
2005 void __iomem
*ofsAddr
= port
->tableAddr
;
2006 u16 rptr
, wptr
, mask
;
2008 rptr
= readw(ofsAddr
+ RXrptr
);
2009 wptr
= readw(ofsAddr
+ RXwptr
);
2010 mask
= readw(ofsAddr
+ RX_mask
);
2011 return (wptr
- rptr
) & mask
;
2014 static void MoxaPortTxDisable(struct moxa_port
*port
)
2016 moxafunc(port
->tableAddr
, FC_SetXoffState
, Magic_code
);
2019 static void MoxaPortTxEnable(struct moxa_port
*port
)
2021 moxafunc(port
->tableAddr
, FC_SetXonState
, Magic_code
);
2024 static int moxa_get_serial_info(struct moxa_port
*info
,
2025 struct serial_struct __user
*retinfo
)
2027 struct serial_struct tmp
= {
2029 .line
= info
->port
.tty
->index
,
2030 .flags
= info
->port
.flags
,
2031 .baud_base
= 921600,
2032 .close_delay
= info
->port
.close_delay
2034 return copy_to_user(retinfo
, &tmp
, sizeof(*retinfo
)) ? -EFAULT
: 0;
2038 static int moxa_set_serial_info(struct moxa_port
*info
,
2039 struct serial_struct __user
*new_info
)
2041 struct serial_struct new_serial
;
2043 if (copy_from_user(&new_serial
, new_info
, sizeof(new_serial
)))
2046 if (new_serial
.irq
!= 0 || new_serial
.port
!= 0 ||
2047 new_serial
.custom_divisor
!= 0 ||
2048 new_serial
.baud_base
!= 921600)
2051 if (!capable(CAP_SYS_ADMIN
)) {
2052 if (((new_serial
.flags
& ~ASYNC_USR_MASK
) !=
2053 (info
->port
.flags
& ~ASYNC_USR_MASK
)))
2056 info
->port
.close_delay
= new_serial
.close_delay
* HZ
/ 100;
2058 new_serial
.flags
= (new_serial
.flags
& ~ASYNC_FLAGS
);
2059 new_serial
.flags
|= (info
->port
.flags
& ASYNC_FLAGS
);
2061 MoxaSetFifo(info
, new_serial
.type
== PORT_16550A
);
2063 info
->type
= new_serial
.type
;
2069 /*****************************************************************************
2070 * Static local functions: *
2071 *****************************************************************************/
2073 static void MoxaSetFifo(struct moxa_port
*port
, int enable
)
2075 void __iomem
*ofsAddr
= port
->tableAddr
;
2078 moxafunc(ofsAddr
, FC_SetRxFIFOTrig
, 0);
2079 moxafunc(ofsAddr
, FC_SetTxFIFOCnt
, 1);
2081 moxafunc(ofsAddr
, FC_SetRxFIFOTrig
, 3);
2082 moxafunc(ofsAddr
, FC_SetTxFIFOCnt
, 16);