1 /*****************************************************************************/
3 * moxa.c -- MOXA Intellio family multiport serial driver.
5 * Copyright (C) 1999-2000 Moxa Technologies (support@moxa.com.tw).
7 * This code is loosely based on the Linux serial driver, written by
8 * Linus Torvalds, Theodore T'so and others.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
17 * MOXA Intellio Series Driver
23 #include <linux/module.h>
24 #include <linux/types.h>
26 #include <linux/ioport.h>
27 #include <linux/errno.h>
28 #include <linux/firmware.h>
29 #include <linux/signal.h>
30 #include <linux/sched.h>
31 #include <linux/timer.h>
32 #include <linux/interrupt.h>
33 #include <linux/tty.h>
34 #include <linux/tty_flip.h>
35 #include <linux/major.h>
36 #include <linux/string.h>
37 #include <linux/fcntl.h>
38 #include <linux/ptrace.h>
39 #include <linux/serial.h>
40 #include <linux/tty_driver.h>
41 #include <linux/delay.h>
42 #include <linux/pci.h>
43 #include <linux/init.h>
44 #include <linux/bitops.h>
46 #include <asm/system.h>
48 #include <asm/uaccess.h>
52 #define MOXA_VERSION "5.1k"
54 #define MOXA_FW_HDRLEN 32
58 #define MAX_BOARDS 4 /* Don't change this value */
59 #define MAX_PORTS_PER_BOARD 32 /* Don't change this value */
60 #define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD)
62 #define MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \
63 (brd)->boardType == MOXA_BOARD_C320_PCI)
66 * Define the Moxa PCI vendor and device IDs.
68 #define MOXA_BUS_TYPE_ISA 0
69 #define MOXA_BUS_TYPE_PCI 1
72 MOXA_BOARD_C218_PCI
= 1,
79 static char *moxa_brdname
[] =
81 "C218 Turbo PCI series",
82 "C218 Turbo ISA series",
83 "C320 Turbo PCI series",
84 "C320 Turbo ISA series",
89 static struct pci_device_id moxa_pcibrds
[] = {
90 { PCI_DEVICE(PCI_VENDOR_ID_MOXA
, PCI_DEVICE_ID_MOXA_C218
),
91 .driver_data
= MOXA_BOARD_C218_PCI
},
92 { PCI_DEVICE(PCI_VENDOR_ID_MOXA
, PCI_DEVICE_ID_MOXA_C320
),
93 .driver_data
= MOXA_BOARD_C320_PCI
},
94 { PCI_DEVICE(PCI_VENDOR_ID_MOXA
, PCI_DEVICE_ID_MOXA_CP204J
),
95 .driver_data
= MOXA_BOARD_CP204J
},
98 MODULE_DEVICE_TABLE(pci
, moxa_pcibrds
);
99 #endif /* CONFIG_PCI */
103 static struct moxa_board_conf
{
110 struct moxa_port
*ports
;
112 void __iomem
*basemem
;
113 void __iomem
*intNdx
;
114 void __iomem
*intPend
;
115 void __iomem
*intTable
;
116 } moxa_boards
[MAX_BOARDS
];
118 struct mxser_mstatus
{
132 struct moxa_board_conf
*board
;
133 struct tty_struct
*tty
;
134 void __iomem
*tableAddr
;
141 unsigned long statusflags
;
142 wait_queue_head_t open_wait
;
151 int rxcnt
[MAX_PORTS
];
152 int txcnt
[MAX_PORTS
];
156 #define TXSTOPPED 0x1
158 #define EMPTYWAIT 0x4
161 #define SERIAL_DO_RESTART
163 #define WAKEUP_CHARS 256
165 static int ttymajor
= MOXAMAJOR
;
166 static struct mon_str moxaLog
;
167 static unsigned int moxaFuncTout
= HZ
/ 2;
168 static unsigned int moxaLowWaterChk
;
169 static DEFINE_MUTEX(moxa_openlock
);
170 /* Variables for insmod */
172 static unsigned long baseaddr
[MAX_BOARDS
];
173 static unsigned int type
[MAX_BOARDS
];
174 static unsigned int numports
[MAX_BOARDS
];
177 MODULE_AUTHOR("William Chen");
178 MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
179 MODULE_LICENSE("GPL");
181 module_param_array(type
, uint
, NULL
, 0);
182 MODULE_PARM_DESC(type
, "card type: C218=2, C320=4");
183 module_param_array(baseaddr
, ulong
, NULL
, 0);
184 MODULE_PARM_DESC(baseaddr
, "base address");
185 module_param_array(numports
, uint
, NULL
, 0);
186 MODULE_PARM_DESC(numports
, "numports (ignored for C218)");
188 module_param(ttymajor
, int, 0);
193 static int moxa_open(struct tty_struct
*, struct file
*);
194 static void moxa_close(struct tty_struct
*, struct file
*);
195 static int moxa_write(struct tty_struct
*, const unsigned char *, int);
196 static int moxa_write_room(struct tty_struct
*);
197 static void moxa_flush_buffer(struct tty_struct
*);
198 static int moxa_chars_in_buffer(struct tty_struct
*);
199 static void moxa_throttle(struct tty_struct
*);
200 static void moxa_unthrottle(struct tty_struct
*);
201 static void moxa_set_termios(struct tty_struct
*, struct ktermios
*);
202 static void moxa_stop(struct tty_struct
*);
203 static void moxa_start(struct tty_struct
*);
204 static void moxa_hangup(struct tty_struct
*);
205 static int moxa_tiocmget(struct tty_struct
*tty
, struct file
*file
);
206 static int moxa_tiocmset(struct tty_struct
*tty
, struct file
*file
,
207 unsigned int set
, unsigned int clear
);
208 static void moxa_poll(unsigned long);
209 static void moxa_set_tty_param(struct tty_struct
*, struct ktermios
*);
210 static void moxa_setup_empty_event(struct tty_struct
*);
211 static void moxa_shut_down(struct moxa_port
*);
213 * moxa board interface functions:
215 static void MoxaPortEnable(struct moxa_port
*);
216 static void MoxaPortDisable(struct moxa_port
*);
217 static int MoxaPortSetTermio(struct moxa_port
*, struct ktermios
*, speed_t
);
218 static int MoxaPortGetLineOut(struct moxa_port
*, int *, int *);
219 static void MoxaPortLineCtrl(struct moxa_port
*, int, int);
220 static void MoxaPortFlowCtrl(struct moxa_port
*, int, int, int, int, int);
221 static int MoxaPortLineStatus(struct moxa_port
*);
222 static void MoxaPortFlushData(struct moxa_port
*, int);
223 static int MoxaPortWriteData(struct moxa_port
*, const unsigned char *, int);
224 static int MoxaPortReadData(struct moxa_port
*);
225 static int MoxaPortTxQueue(struct moxa_port
*);
226 static int MoxaPortRxQueue(struct moxa_port
*);
227 static int MoxaPortTxFree(struct moxa_port
*);
228 static void MoxaPortTxDisable(struct moxa_port
*);
229 static void MoxaPortTxEnable(struct moxa_port
*);
230 static int moxa_get_serial_info(struct moxa_port
*, struct serial_struct __user
*);
231 static int moxa_set_serial_info(struct moxa_port
*, struct serial_struct __user
*);
232 static void MoxaSetFifo(struct moxa_port
*port
, int enable
);
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
)
251 writew(arg
, ofsAddr
+ FuncArg
);
252 writew(cmd
, ofsAddr
+ FuncCode
);
253 moxa_wait_finish(ofsAddr
);
256 static void moxa_low_water_check(void __iomem
*ofsAddr
)
258 u16 rptr
, wptr
, mask
, len
;
260 if (readb(ofsAddr
+ FlagStat
) & Xoff_state
) {
261 rptr
= readw(ofsAddr
+ RXrptr
);
262 wptr
= readw(ofsAddr
+ RXwptr
);
263 mask
= readw(ofsAddr
+ RX_mask
);
264 len
= (wptr
- rptr
) & mask
;
265 if (len
<= Low_water
)
266 moxafunc(ofsAddr
, FC_SendXon
, 0);
274 static int moxa_ioctl(struct tty_struct
*tty
, struct file
*file
,
275 unsigned int cmd
, unsigned long arg
)
277 struct moxa_port
*ch
= tty
->driver_data
;
278 void __user
*argp
= (void __user
*)arg
;
281 if (tty
->index
== MAX_PORTS
) {
282 if (cmd
!= MOXA_GETDATACOUNT
&& cmd
!= MOXA_GET_IOQUEUE
&&
283 cmd
!= MOXA_GETMSTATUS
)
289 case MOXA_GETDATACOUNT
:
290 moxaLog
.tick
= jiffies
;
291 if (copy_to_user(argp
, &moxaLog
, sizeof(moxaLog
)))
294 case MOXA_FLUSH_QUEUE
:
295 MoxaPortFlushData(ch
, arg
);
297 case MOXA_GET_IOQUEUE
: {
298 struct moxaq_str __user
*argm
= argp
;
299 struct moxaq_str tmp
;
303 mutex_lock(&moxa_openlock
);
304 for (i
= 0; i
< MAX_BOARDS
; i
++) {
305 p
= moxa_boards
[i
].ports
;
306 for (j
= 0; j
< MAX_PORTS_PER_BOARD
; j
++, p
++, argm
++) {
307 memset(&tmp
, 0, sizeof(tmp
));
308 if (moxa_boards
[i
].ready
) {
309 tmp
.inq
= MoxaPortRxQueue(p
);
310 tmp
.outq
= MoxaPortTxQueue(p
);
312 if (copy_to_user(argm
, &tmp
, sizeof(tmp
))) {
313 mutex_unlock(&moxa_openlock
);
318 mutex_unlock(&moxa_openlock
);
320 } case MOXA_GET_OQUEUE
:
321 status
= MoxaPortTxQueue(ch
);
322 ret
= put_user(status
, (unsigned long __user
*)argp
);
324 case MOXA_GET_IQUEUE
:
325 status
= MoxaPortRxQueue(ch
);
326 ret
= put_user(status
, (unsigned long __user
*)argp
);
328 case MOXA_GETMSTATUS
: {
329 struct mxser_mstatus __user
*argm
= argp
;
330 struct mxser_mstatus tmp
;
334 mutex_lock(&moxa_openlock
);
335 for (i
= 0; i
< MAX_BOARDS
; i
++) {
336 p
= moxa_boards
[i
].ports
;
337 for (j
= 0; j
< MAX_PORTS_PER_BOARD
; j
++, p
++, argm
++) {
338 memset(&tmp
, 0, sizeof(tmp
));
339 if (!moxa_boards
[i
].ready
)
342 status
= MoxaPortLineStatus(p
);
350 if (!p
->tty
|| !p
->tty
->termios
)
351 tmp
.cflag
= p
->cflag
;
353 tmp
.cflag
= p
->tty
->termios
->c_cflag
;
355 if (copy_to_user(argm
, &tmp
, sizeof(tmp
))) {
356 mutex_unlock(&moxa_openlock
);
361 mutex_unlock(&moxa_openlock
);
365 mutex_lock(&moxa_openlock
);
366 ret
= moxa_get_serial_info(ch
, argp
);
367 mutex_unlock(&moxa_openlock
);
370 mutex_lock(&moxa_openlock
);
371 ret
= moxa_set_serial_info(ch
, argp
);
372 mutex_unlock(&moxa_openlock
);
380 static void moxa_break_ctl(struct tty_struct
*tty
, int state
)
382 struct moxa_port
*port
= tty
->driver_data
;
384 moxafunc(port
->tableAddr
, state
? FC_SendBreak
: FC_StopBreak
,
388 static const struct tty_operations moxa_ops
= {
392 .write_room
= moxa_write_room
,
393 .flush_buffer
= moxa_flush_buffer
,
394 .chars_in_buffer
= moxa_chars_in_buffer
,
396 .throttle
= moxa_throttle
,
397 .unthrottle
= moxa_unthrottle
,
398 .set_termios
= moxa_set_termios
,
401 .hangup
= moxa_hangup
,
402 .break_ctl
= moxa_break_ctl
,
403 .tiocmget
= moxa_tiocmget
,
404 .tiocmset
= moxa_tiocmset
,
407 static struct tty_driver
*moxaDriver
;
408 static DEFINE_TIMER(moxaTimer
, moxa_poll
, 0, 0);
409 static DEFINE_SPINLOCK(moxa_lock
);
415 static int moxa_check_fw_model(struct moxa_board_conf
*brd
, u8 model
)
417 switch (brd
->boardType
) {
418 case MOXA_BOARD_C218_ISA
:
419 case MOXA_BOARD_C218_PCI
:
423 case MOXA_BOARD_CP204J
:
437 static int moxa_check_fw(const void *ptr
)
439 const __le16
*lptr
= ptr
;
441 if (*lptr
!= cpu_to_le16(0x7980))
447 static int moxa_load_bios(struct moxa_board_conf
*brd
, const u8
*buf
,
450 void __iomem
*baseAddr
= brd
->basemem
;
453 writeb(HW_reset
, baseAddr
+ Control_reg
); /* reset */
455 memset_io(baseAddr
, 0, 4096);
456 memcpy_toio(baseAddr
, buf
, len
); /* download BIOS */
457 writeb(0, baseAddr
+ Control_reg
); /* restart */
461 switch (brd
->boardType
) {
462 case MOXA_BOARD_C218_ISA
:
463 case MOXA_BOARD_C218_PCI
:
464 tmp
= readw(baseAddr
+ C218_key
);
465 if (tmp
!= C218_KeyCode
)
468 case MOXA_BOARD_CP204J
:
469 tmp
= readw(baseAddr
+ C218_key
);
470 if (tmp
!= CP204J_KeyCode
)
474 tmp
= readw(baseAddr
+ C320_key
);
475 if (tmp
!= C320_KeyCode
)
477 tmp
= readw(baseAddr
+ C320_status
);
478 if (tmp
!= STS_init
) {
479 printk(KERN_ERR
"MOXA: bios upload failed -- CPU/Basic "
480 "module not found\n");
488 printk(KERN_ERR
"MOXA: bios upload failed -- board not found\n");
492 static int moxa_load_320b(struct moxa_board_conf
*brd
, const u8
*ptr
,
495 void __iomem
*baseAddr
= brd
->basemem
;
498 printk(KERN_ERR
"MOXA: invalid 320 bios -- too short\n");
502 writew(len
- 7168 - 2, baseAddr
+ C320bapi_len
);
503 writeb(1, baseAddr
+ Control_reg
); /* Select Page 1 */
504 memcpy_toio(baseAddr
+ DynPage_addr
, ptr
, 7168);
505 writeb(2, baseAddr
+ Control_reg
); /* Select Page 2 */
506 memcpy_toio(baseAddr
+ DynPage_addr
, ptr
+ 7168, len
- 7168);
511 static int moxa_real_load_code(struct moxa_board_conf
*brd
, const void *ptr
,
514 void __iomem
*baseAddr
= brd
->basemem
;
515 const u16
*uptr
= ptr
;
516 size_t wlen
, len2
, j
;
517 unsigned long key
, loadbuf
, loadlen
, checksum
, checksum_ok
;
518 unsigned int i
, retry
;
521 keycode
= (brd
->boardType
== MOXA_BOARD_CP204J
) ? CP204J_KeyCode
:
524 switch (brd
->boardType
) {
525 case MOXA_BOARD_CP204J
:
526 case MOXA_BOARD_C218_ISA
:
527 case MOXA_BOARD_C218_PCI
:
529 loadbuf
= C218_LoadBuf
;
530 loadlen
= C218DLoad_len
;
531 checksum
= C218check_sum
;
532 checksum_ok
= C218chksum_ok
;
536 keycode
= C320_KeyCode
;
537 loadbuf
= C320_LoadBuf
;
538 loadlen
= C320DLoad_len
;
539 checksum
= C320check_sum
;
540 checksum_ok
= C320chksum_ok
;
546 for (i
= 0; i
< wlen
; i
++)
547 usum
+= le16_to_cpu(uptr
[i
]);
553 len2
= (wlen
> 2048) ? 2048 : wlen
;
555 memcpy_toio(baseAddr
+ loadbuf
, ptr
+ j
, len2
<< 1);
558 writew(len2
, baseAddr
+ loadlen
);
559 writew(0, baseAddr
+ key
);
560 for (i
= 0; i
< 100; i
++) {
561 if (readw(baseAddr
+ key
) == keycode
)
565 if (readw(baseAddr
+ key
) != keycode
)
568 writew(0, baseAddr
+ loadlen
);
569 writew(usum
, baseAddr
+ checksum
);
570 writew(0, baseAddr
+ key
);
571 for (i
= 0; i
< 100; i
++) {
572 if (readw(baseAddr
+ key
) == keycode
)
577 } while ((readb(baseAddr
+ checksum_ok
) != 1) && (retry
< 3));
578 if (readb(baseAddr
+ checksum_ok
) != 1)
581 writew(0, baseAddr
+ key
);
582 for (i
= 0; i
< 600; i
++) {
583 if (readw(baseAddr
+ Magic_no
) == Magic_code
)
587 if (readw(baseAddr
+ Magic_no
) != Magic_code
)
590 if (MOXA_IS_320(brd
)) {
591 if (brd
->busType
== MOXA_BUS_TYPE_PCI
) { /* ASIC board */
592 writew(0x3800, baseAddr
+ TMS320_PORT1
);
593 writew(0x3900, baseAddr
+ TMS320_PORT2
);
594 writew(28499, baseAddr
+ TMS320_CLOCK
);
596 writew(0x3200, baseAddr
+ TMS320_PORT1
);
597 writew(0x3400, baseAddr
+ TMS320_PORT2
);
598 writew(19999, baseAddr
+ TMS320_CLOCK
);
601 writew(1, baseAddr
+ Disable_IRQ
);
602 writew(0, baseAddr
+ Magic_no
);
603 for (i
= 0; i
< 500; i
++) {
604 if (readw(baseAddr
+ Magic_no
) == Magic_code
)
608 if (readw(baseAddr
+ Magic_no
) != Magic_code
)
611 if (MOXA_IS_320(brd
)) {
612 j
= readw(baseAddr
+ Module_cnt
);
615 brd
->numPorts
= j
* 8;
616 writew(j
, baseAddr
+ Module_no
);
617 writew(0, baseAddr
+ Magic_no
);
618 for (i
= 0; i
< 600; i
++) {
619 if (readw(baseAddr
+ Magic_no
) == Magic_code
)
623 if (readw(baseAddr
+ Magic_no
) != Magic_code
)
626 brd
->intNdx
= baseAddr
+ IRQindex
;
627 brd
->intPend
= baseAddr
+ IRQpending
;
628 brd
->intTable
= baseAddr
+ IRQtable
;
633 static int moxa_load_code(struct moxa_board_conf
*brd
, const void *ptr
,
636 void __iomem
*ofsAddr
, *baseAddr
= brd
->basemem
;
637 struct moxa_port
*port
;
641 printk(KERN_ERR
"MOXA: bios length is not even\n");
645 retval
= moxa_real_load_code(brd
, ptr
, len
); /* may change numPorts */
649 switch (brd
->boardType
) {
650 case MOXA_BOARD_C218_ISA
:
651 case MOXA_BOARD_C218_PCI
:
652 case MOXA_BOARD_CP204J
:
654 for (i
= 0; i
< brd
->numPorts
; i
++, port
++) {
657 port
->tableAddr
= baseAddr
+ Extern_table
+
659 ofsAddr
= port
->tableAddr
;
660 writew(C218rx_mask
, ofsAddr
+ RX_mask
);
661 writew(C218tx_mask
, ofsAddr
+ TX_mask
);
662 writew(C218rx_spage
+ i
* C218buf_pageno
, ofsAddr
+ Page_rxb
);
663 writew(readw(ofsAddr
+ Page_rxb
) + C218rx_pageno
, ofsAddr
+ EndPage_rxb
);
665 writew(C218tx_spage
+ i
* C218buf_pageno
, ofsAddr
+ Page_txb
);
666 writew(readw(ofsAddr
+ Page_txb
) + C218tx_pageno
, ofsAddr
+ EndPage_txb
);
672 for (i
= 0; i
< brd
->numPorts
; i
++, port
++) {
675 port
->tableAddr
= baseAddr
+ Extern_table
+
677 ofsAddr
= port
->tableAddr
;
678 switch (brd
->numPorts
) {
680 writew(C320p8rx_mask
, ofsAddr
+ RX_mask
);
681 writew(C320p8tx_mask
, ofsAddr
+ TX_mask
);
682 writew(C320p8rx_spage
+ i
* C320p8buf_pgno
, ofsAddr
+ Page_rxb
);
683 writew(readw(ofsAddr
+ Page_rxb
) + C320p8rx_pgno
, ofsAddr
+ EndPage_rxb
);
684 writew(C320p8tx_spage
+ i
* C320p8buf_pgno
, ofsAddr
+ Page_txb
);
685 writew(readw(ofsAddr
+ Page_txb
) + C320p8tx_pgno
, ofsAddr
+ EndPage_txb
);
689 writew(C320p16rx_mask
, ofsAddr
+ RX_mask
);
690 writew(C320p16tx_mask
, ofsAddr
+ TX_mask
);
691 writew(C320p16rx_spage
+ i
* C320p16buf_pgno
, ofsAddr
+ Page_rxb
);
692 writew(readw(ofsAddr
+ Page_rxb
) + C320p16rx_pgno
, ofsAddr
+ EndPage_rxb
);
693 writew(C320p16tx_spage
+ i
* C320p16buf_pgno
, ofsAddr
+ Page_txb
);
694 writew(readw(ofsAddr
+ Page_txb
) + C320p16tx_pgno
, ofsAddr
+ EndPage_txb
);
698 writew(C320p24rx_mask
, ofsAddr
+ RX_mask
);
699 writew(C320p24tx_mask
, ofsAddr
+ TX_mask
);
700 writew(C320p24rx_spage
+ i
* C320p24buf_pgno
, ofsAddr
+ Page_rxb
);
701 writew(readw(ofsAddr
+ Page_rxb
) + C320p24rx_pgno
, ofsAddr
+ EndPage_rxb
);
702 writew(C320p24tx_spage
+ i
* C320p24buf_pgno
, ofsAddr
+ Page_txb
);
703 writew(readw(ofsAddr
+ Page_txb
), ofsAddr
+ EndPage_txb
);
706 writew(C320p32rx_mask
, ofsAddr
+ RX_mask
);
707 writew(C320p32tx_mask
, ofsAddr
+ TX_mask
);
708 writew(C320p32tx_ofs
, ofsAddr
+ Ofs_txb
);
709 writew(C320p32rx_spage
+ i
* C320p32buf_pgno
, ofsAddr
+ Page_rxb
);
710 writew(readb(ofsAddr
+ Page_rxb
), ofsAddr
+ EndPage_rxb
);
711 writew(C320p32tx_spage
+ i
* C320p32buf_pgno
, ofsAddr
+ Page_txb
);
712 writew(readw(ofsAddr
+ Page_txb
), ofsAddr
+ EndPage_txb
);
721 static int moxa_load_fw(struct moxa_board_conf
*brd
, const struct firmware
*fw
)
723 void *ptr
= fw
->data
;
727 unsigned int a
, lenp
, lencnt
;
730 __le32 magic
; /* 0x34303430 */
732 u8 type
; /* UNIX = 3 */
733 u8 model
; /* C218T=1, C320T=2, CP204=3 */
738 BUILD_BUG_ON(ARRAY_SIZE(hdr
->len
) != ARRAY_SIZE(lens
));
740 if (fw
->size
< MOXA_FW_HDRLEN
) {
741 strcpy(rsn
, "too short (even header won't fit)");
744 if (hdr
->magic
!= cpu_to_le32(0x30343034)) {
745 sprintf(rsn
, "bad magic: %.8x", le32_to_cpu(hdr
->magic
));
748 if (hdr
->type
!= 3) {
749 sprintf(rsn
, "not for linux, type is %u", hdr
->type
);
752 if (moxa_check_fw_model(brd
, hdr
->model
)) {
753 sprintf(rsn
, "not for this card, model is %u", hdr
->model
);
757 len
= MOXA_FW_HDRLEN
;
758 lencnt
= hdr
->model
== 2 ? 5 : 3;
759 for (a
= 0; a
< ARRAY_SIZE(lens
); a
++) {
760 lens
[a
] = le16_to_cpu(hdr
->len
[a
]);
761 if (lens
[a
] && len
+ lens
[a
] <= fw
->size
&&
762 moxa_check_fw(&fw
->data
[len
]))
763 printk(KERN_WARNING
"MOXA firmware: unexpected input "
764 "at offset %u, but going on\n", (u32
)len
);
765 if (!lens
[a
] && a
< lencnt
) {
766 sprintf(rsn
, "too few entries in fw file");
772 if (len
!= fw
->size
) {
773 sprintf(rsn
, "bad length: %u (should be %u)", (u32
)fw
->size
,
778 ptr
+= MOXA_FW_HDRLEN
;
781 strcpy(rsn
, "read above");
783 ret
= moxa_load_bios(brd
, ptr
, lens
[lenp
]);
787 /* we skip the tty section (lens[1]), since we don't need it */
788 ptr
+= lens
[lenp
] + lens
[lenp
+ 1];
789 lenp
+= 2; /* comm */
791 if (hdr
->model
== 2) {
792 ret
= moxa_load_320b(brd
, ptr
, lens
[lenp
]);
795 /* skip another tty */
796 ptr
+= lens
[lenp
] + lens
[lenp
+ 1];
800 ret
= moxa_load_code(brd
, ptr
, lens
[lenp
]);
806 printk(KERN_ERR
"firmware failed to load, reason: %s\n", rsn
);
810 static int moxa_init_board(struct moxa_board_conf
*brd
, struct device
*dev
)
812 const struct firmware
*fw
;
818 brd
->ports
= kcalloc(MAX_PORTS_PER_BOARD
, sizeof(*brd
->ports
),
820 if (brd
->ports
== NULL
) {
821 printk(KERN_ERR
"cannot allocate memory for ports\n");
826 for (i
= 0, p
= brd
->ports
; i
< MAX_PORTS_PER_BOARD
; i
++, p
++) {
827 p
->type
= PORT_16550A
;
828 p
->close_delay
= 5 * HZ
/ 10;
829 p
->cflag
= B9600
| CS8
| CREAD
| CLOCAL
| HUPCL
;
830 init_waitqueue_head(&p
->open_wait
);
833 switch (brd
->boardType
) {
834 case MOXA_BOARD_C218_ISA
:
835 case MOXA_BOARD_C218_PCI
:
836 file
= "c218tunx.cod";
838 case MOXA_BOARD_CP204J
:
839 file
= "cp204unx.cod";
842 file
= "c320tunx.cod";
846 ret
= request_firmware(&fw
, file
, dev
);
848 printk(KERN_ERR
"request_firmware failed\n");
852 ret
= moxa_load_fw(brd
, fw
);
854 release_firmware(fw
);
859 spin_lock_bh(&moxa_lock
);
861 if (!timer_pending(&moxaTimer
))
862 mod_timer(&moxaTimer
, jiffies
+ HZ
/ 50);
863 spin_unlock_bh(&moxa_lock
);
872 static void moxa_board_deinit(struct moxa_board_conf
*brd
)
874 unsigned int a
, opened
;
876 mutex_lock(&moxa_openlock
);
877 spin_lock_bh(&moxa_lock
);
879 spin_unlock_bh(&moxa_lock
);
881 /* pci hot-un-plug support */
882 for (a
= 0; a
< brd
->numPorts
; a
++)
883 if (brd
->ports
[a
].asyncflags
& ASYNC_INITIALIZED
)
884 tty_hangup(brd
->ports
[a
].tty
);
887 for (a
= 0; a
< brd
->numPorts
; a
++)
888 if (brd
->ports
[a
].asyncflags
& ASYNC_INITIALIZED
)
890 mutex_unlock(&moxa_openlock
);
894 mutex_lock(&moxa_openlock
);
897 iounmap(brd
->basemem
);
903 static int __devinit
moxa_pci_probe(struct pci_dev
*pdev
,
904 const struct pci_device_id
*ent
)
906 struct moxa_board_conf
*board
;
908 int board_type
= ent
->driver_data
;
911 retval
= pci_enable_device(pdev
);
913 dev_err(&pdev
->dev
, "can't enable pci device\n");
917 for (i
= 0; i
< MAX_BOARDS
; i
++)
918 if (moxa_boards
[i
].basemem
== NULL
)
922 if (i
>= MAX_BOARDS
) {
923 dev_warn(&pdev
->dev
, "more than %u MOXA Intellio family boards "
924 "found. Board is ignored.\n", MAX_BOARDS
);
928 board
= &moxa_boards
[i
];
930 retval
= pci_request_region(pdev
, 2, "moxa-base");
932 dev_err(&pdev
->dev
, "can't request pci region 2\n");
936 board
->basemem
= ioremap(pci_resource_start(pdev
, 2), 0x4000);
937 if (board
->basemem
== NULL
) {
938 dev_err(&pdev
->dev
, "can't remap io space 2\n");
942 board
->boardType
= board_type
;
943 switch (board_type
) {
944 case MOXA_BOARD_C218_ISA
:
945 case MOXA_BOARD_C218_PCI
:
949 case MOXA_BOARD_CP204J
:
956 board
->busType
= MOXA_BUS_TYPE_PCI
;
958 retval
= moxa_init_board(board
, &pdev
->dev
);
962 pci_set_drvdata(pdev
, board
);
964 dev_info(&pdev
->dev
, "board '%s' ready (%u ports, firmware loaded)\n",
965 moxa_brdname
[board_type
- 1], board
->numPorts
);
969 iounmap(board
->basemem
);
970 board
->basemem
= NULL
;
972 pci_release_region(pdev
, 2);
977 static void __devexit
moxa_pci_remove(struct pci_dev
*pdev
)
979 struct moxa_board_conf
*brd
= pci_get_drvdata(pdev
);
981 moxa_board_deinit(brd
);
983 pci_release_region(pdev
, 2);
986 static struct pci_driver moxa_pci_driver
= {
988 .id_table
= moxa_pcibrds
,
989 .probe
= moxa_pci_probe
,
990 .remove
= __devexit_p(moxa_pci_remove
)
992 #endif /* CONFIG_PCI */
994 static int __init
moxa_init(void)
996 unsigned int isabrds
= 0;
999 printk(KERN_INFO
"MOXA Intellio family driver version %s\n",
1001 moxaDriver
= alloc_tty_driver(MAX_PORTS
+ 1);
1005 moxaDriver
->owner
= THIS_MODULE
;
1006 moxaDriver
->name
= "ttyMX";
1007 moxaDriver
->major
= ttymajor
;
1008 moxaDriver
->minor_start
= 0;
1009 moxaDriver
->type
= TTY_DRIVER_TYPE_SERIAL
;
1010 moxaDriver
->subtype
= SERIAL_TYPE_NORMAL
;
1011 moxaDriver
->init_termios
= tty_std_termios
;
1012 moxaDriver
->init_termios
.c_cflag
= B9600
| CS8
| CREAD
| CLOCAL
| HUPCL
;
1013 moxaDriver
->init_termios
.c_ispeed
= 9600;
1014 moxaDriver
->init_termios
.c_ospeed
= 9600;
1015 moxaDriver
->flags
= TTY_DRIVER_REAL_RAW
;
1016 tty_set_operations(moxaDriver
, &moxa_ops
);
1018 if (tty_register_driver(moxaDriver
)) {
1019 printk(KERN_ERR
"can't register MOXA Smartio tty driver!\n");
1020 put_tty_driver(moxaDriver
);
1024 /* Find the boards defined from module args. */
1027 struct moxa_board_conf
*brd
= moxa_boards
;
1029 for (i
= 0; i
< MAX_BOARDS
; i
++) {
1032 if (type
[i
] == MOXA_BOARD_C218_ISA
||
1033 type
[i
] == MOXA_BOARD_C320_ISA
) {
1034 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
1035 isabrds
+ 1, moxa_brdname
[type
[i
] - 1],
1037 brd
->boardType
= type
[i
];
1038 brd
->numPorts
= type
[i
] == MOXA_BOARD_C218_ISA
? 8 :
1040 brd
->busType
= MOXA_BUS_TYPE_ISA
;
1041 brd
->basemem
= ioremap(baseaddr
[i
], 0x4000);
1042 if (!brd
->basemem
) {
1043 printk(KERN_ERR
"MOXA: can't remap %lx\n",
1047 if (moxa_init_board(brd
, NULL
)) {
1048 iounmap(brd
->basemem
);
1049 brd
->basemem
= NULL
;
1053 printk(KERN_INFO
"MOXA isa board found at 0x%.8lu and "
1054 "ready (%u ports, firmware loaded)\n",
1055 baseaddr
[i
], brd
->numPorts
);
1065 retval
= pci_register_driver(&moxa_pci_driver
);
1067 printk(KERN_ERR
"Can't register MOXA pci driver!\n");
1076 static void __exit
moxa_exit(void)
1081 pci_unregister_driver(&moxa_pci_driver
);
1084 for (i
= 0; i
< MAX_BOARDS
; i
++) /* ISA boards */
1085 if (moxa_boards
[i
].ready
)
1086 moxa_board_deinit(&moxa_boards
[i
]);
1088 del_timer_sync(&moxaTimer
);
1090 if (tty_unregister_driver(moxaDriver
))
1091 printk(KERN_ERR
"Couldn't unregister MOXA Intellio family "
1093 put_tty_driver(moxaDriver
);
1096 module_init(moxa_init
);
1097 module_exit(moxa_exit
);
1099 static void moxa_close_port(struct moxa_port
*ch
)
1102 MoxaPortFlushData(ch
, 2);
1103 ch
->asyncflags
&= ~ASYNC_NORMAL_ACTIVE
;
1104 ch
->tty
->driver_data
= NULL
;
1108 static int moxa_block_till_ready(struct tty_struct
*tty
, struct file
*filp
,
1109 struct moxa_port
*ch
)
1116 prepare_to_wait(&ch
->open_wait
, &wait
, TASK_INTERRUPTIBLE
);
1117 if (tty_hung_up_p(filp
)) {
1118 #ifdef SERIAL_DO_RESTART
1119 retval
= -ERESTARTSYS
;
1125 spin_lock_bh(&moxa_lock
);
1127 spin_unlock_bh(&moxa_lock
);
1131 if (signal_pending(current
)) {
1132 retval
= -ERESTARTSYS
;
1137 finish_wait(&ch
->open_wait
, &wait
);
1142 static int moxa_open(struct tty_struct
*tty
, struct file
*filp
)
1144 struct moxa_board_conf
*brd
;
1145 struct moxa_port
*ch
;
1150 if (port
== MAX_PORTS
) {
1151 return capable(CAP_SYS_ADMIN
) ? 0 : -EPERM
;
1153 if (mutex_lock_interruptible(&moxa_openlock
))
1154 return -ERESTARTSYS
;
1155 brd
= &moxa_boards
[port
/ MAX_PORTS_PER_BOARD
];
1157 mutex_unlock(&moxa_openlock
);
1161 ch
= &brd
->ports
[port
% MAX_PORTS_PER_BOARD
];
1163 tty
->driver_data
= ch
;
1165 if (!(ch
->asyncflags
& ASYNC_INITIALIZED
)) {
1166 ch
->statusflags
= 0;
1167 moxa_set_tty_param(tty
, tty
->termios
);
1168 MoxaPortLineCtrl(ch
, 1, 1);
1170 MoxaSetFifo(ch
, ch
->type
== PORT_16550A
);
1171 ch
->asyncflags
|= ASYNC_INITIALIZED
;
1173 mutex_unlock(&moxa_openlock
);
1176 if (!(filp
->f_flags
& O_NONBLOCK
) && !C_CLOCAL(tty
))
1177 retval
= moxa_block_till_ready(tty
, filp
, ch
);
1178 mutex_lock(&moxa_openlock
);
1180 if (ch
->count
) /* 0 means already hung up... */
1181 if (--ch
->count
== 0)
1182 moxa_close_port(ch
);
1184 ch
->asyncflags
|= ASYNC_NORMAL_ACTIVE
;
1185 mutex_unlock(&moxa_openlock
);
1190 static void moxa_close(struct tty_struct
*tty
, struct file
*filp
)
1192 struct moxa_port
*ch
;
1196 if (port
== MAX_PORTS
|| tty_hung_up_p(filp
))
1199 mutex_lock(&moxa_openlock
);
1200 ch
= tty
->driver_data
;
1203 if (tty
->count
== 1 && ch
->count
!= 1) {
1204 printk(KERN_WARNING
"moxa_close: bad serial port count; "
1205 "tty->count is 1, ch->count is %d\n", ch
->count
);
1208 if (--ch
->count
< 0) {
1209 printk(KERN_WARNING
"moxa_close: bad serial port count, "
1210 "device=%s\n", tty
->name
);
1216 ch
->cflag
= tty
->termios
->c_cflag
;
1217 if (ch
->asyncflags
& ASYNC_INITIALIZED
) {
1218 moxa_setup_empty_event(tty
);
1219 tty_wait_until_sent(tty
, 30 * HZ
); /* 30 seconds timeout */
1222 moxa_close_port(ch
);
1224 mutex_unlock(&moxa_openlock
);
1227 static int moxa_write(struct tty_struct
*tty
,
1228 const unsigned char *buf
, int count
)
1230 struct moxa_port
*ch
= tty
->driver_data
;
1236 spin_lock_bh(&moxa_lock
);
1237 len
= MoxaPortWriteData(ch
, buf
, count
);
1238 spin_unlock_bh(&moxa_lock
);
1240 ch
->statusflags
|= LOWWAIT
;
1244 static int moxa_write_room(struct tty_struct
*tty
)
1246 struct moxa_port
*ch
;
1250 ch
= tty
->driver_data
;
1253 return MoxaPortTxFree(ch
);
1256 static void moxa_flush_buffer(struct tty_struct
*tty
)
1258 struct moxa_port
*ch
= tty
->driver_data
;
1262 MoxaPortFlushData(ch
, 1);
1266 static int moxa_chars_in_buffer(struct tty_struct
*tty
)
1268 struct moxa_port
*ch
= tty
->driver_data
;
1272 * Sigh...I have to check if driver_data is NULL here, because
1273 * if an open() fails, the TTY subsystem eventually calls
1274 * tty_wait_until_sent(), which calls the driver's chars_in_buffer()
1275 * routine. And since the open() failed, we return 0 here. TDJ
1279 chars
= MoxaPortTxQueue(ch
);
1282 * Make it possible to wakeup anything waiting for output
1283 * in tty_ioctl.c, etc.
1285 if (!(ch
->statusflags
& EMPTYWAIT
))
1286 moxa_setup_empty_event(tty
);
1291 static int moxa_tiocmget(struct tty_struct
*tty
, struct file
*file
)
1293 struct moxa_port
*ch
;
1294 int flag
= 0, dtr
, rts
;
1296 mutex_lock(&moxa_openlock
);
1297 ch
= tty
->driver_data
;
1299 mutex_unlock(&moxa_openlock
);
1303 MoxaPortGetLineOut(ch
, &dtr
, &rts
);
1308 dtr
= MoxaPortLineStatus(ch
);
1315 mutex_unlock(&moxa_openlock
);
1319 static int moxa_tiocmset(struct tty_struct
*tty
, struct file
*file
,
1320 unsigned int set
, unsigned int clear
)
1322 struct moxa_port
*ch
;
1327 mutex_lock(&moxa_openlock
);
1328 ch
= tty
->driver_data
;
1330 mutex_unlock(&moxa_openlock
);
1334 MoxaPortGetLineOut(ch
, &dtr
, &rts
);
1335 if (set
& TIOCM_RTS
)
1337 if (set
& TIOCM_DTR
)
1339 if (clear
& TIOCM_RTS
)
1341 if (clear
& TIOCM_DTR
)
1343 MoxaPortLineCtrl(ch
, dtr
, rts
);
1344 mutex_unlock(&moxa_openlock
);
1348 static void moxa_throttle(struct tty_struct
*tty
)
1350 struct moxa_port
*ch
= tty
->driver_data
;
1352 ch
->statusflags
|= THROTTLE
;
1355 static void moxa_unthrottle(struct tty_struct
*tty
)
1357 struct moxa_port
*ch
= tty
->driver_data
;
1359 ch
->statusflags
&= ~THROTTLE
;
1362 static void moxa_set_termios(struct tty_struct
*tty
,
1363 struct ktermios
*old_termios
)
1365 struct moxa_port
*ch
= tty
->driver_data
;
1369 moxa_set_tty_param(tty
, old_termios
);
1370 if (!(old_termios
->c_cflag
& CLOCAL
) && C_CLOCAL(tty
))
1371 wake_up_interruptible(&ch
->open_wait
);
1374 static void moxa_stop(struct tty_struct
*tty
)
1376 struct moxa_port
*ch
= tty
->driver_data
;
1380 MoxaPortTxDisable(ch
);
1381 ch
->statusflags
|= TXSTOPPED
;
1385 static void moxa_start(struct tty_struct
*tty
)
1387 struct moxa_port
*ch
= tty
->driver_data
;
1392 if (!(ch
->statusflags
& TXSTOPPED
))
1395 MoxaPortTxEnable(ch
);
1396 ch
->statusflags
&= ~TXSTOPPED
;
1399 static void moxa_hangup(struct tty_struct
*tty
)
1401 struct moxa_port
*ch
;
1403 mutex_lock(&moxa_openlock
);
1404 ch
= tty
->driver_data
;
1406 mutex_unlock(&moxa_openlock
);
1410 moxa_close_port(ch
);
1411 mutex_unlock(&moxa_openlock
);
1413 wake_up_interruptible(&ch
->open_wait
);
1416 static void moxa_new_dcdstate(struct moxa_port
*p
, u8 dcd
)
1420 if (dcd
!= p
->DCDState
&& p
->tty
&& C_CLOCAL(p
->tty
)) {
1427 static int moxa_poll_port(struct moxa_port
*p
, unsigned int handle
,
1430 struct tty_struct
*tty
= p
->tty
;
1431 void __iomem
*ofsAddr
;
1432 unsigned int inited
= p
->asyncflags
& ASYNC_INITIALIZED
;
1436 if ((p
->statusflags
& EMPTYWAIT
) &&
1437 MoxaPortTxQueue(p
) == 0) {
1438 p
->statusflags
&= ~EMPTYWAIT
;
1441 if ((p
->statusflags
& LOWWAIT
) && !tty
->stopped
&&
1442 MoxaPortTxQueue(p
) <= WAKEUP_CHARS
) {
1443 p
->statusflags
&= ~LOWWAIT
;
1447 if (inited
&& !(p
->statusflags
& THROTTLE
) &&
1448 MoxaPortRxQueue(p
) > 0) { /* RX */
1449 MoxaPortReadData(p
);
1450 tty_schedule_flip(tty
);
1453 p
->statusflags
&= ~EMPTYWAIT
;
1454 MoxaPortFlushData(p
, 0); /* flush RX */
1457 if (!handle
) /* nothing else to do */
1460 intr
= readw(ip
); /* port irq status */
1464 writew(0, ip
); /* ACK port */
1465 ofsAddr
= p
->tableAddr
;
1466 if (intr
& IntrTx
) /* disable tx intr */
1467 writew(readw(ofsAddr
+ HostStat
) & ~WakeupTx
,
1468 ofsAddr
+ HostStat
);
1473 if (tty
&& (intr
& IntrBreak
) && !I_IGNBRK(tty
)) { /* BREAK */
1474 tty_insert_flip_char(tty
, 0, TTY_BREAK
);
1475 tty_schedule_flip(tty
);
1478 if (intr
& IntrLine
)
1479 moxa_new_dcdstate(p
, readb(ofsAddr
+ FlagStat
) & DCD_state
);
1484 static void moxa_poll(unsigned long ignored
)
1486 struct moxa_board_conf
*brd
;
1488 unsigned int card
, port
, served
= 0;
1490 spin_lock(&moxa_lock
);
1491 for (card
= 0; card
< MAX_BOARDS
; card
++) {
1492 brd
= &moxa_boards
[card
];
1499 if (readb(brd
->intPend
) == 0xff)
1500 ip
= brd
->intTable
+ readb(brd
->intNdx
);
1502 for (port
= 0; port
< brd
->numPorts
; port
++)
1503 moxa_poll_port(&brd
->ports
[port
], !!ip
, ip
+ port
);
1506 writeb(0, brd
->intPend
); /* ACK */
1508 if (moxaLowWaterChk
) {
1509 struct moxa_port
*p
= brd
->ports
;
1510 for (port
= 0; port
< brd
->numPorts
; port
++, p
++)
1511 if (p
->lowChkFlag
) {
1513 moxa_low_water_check(p
->tableAddr
);
1517 moxaLowWaterChk
= 0;
1520 mod_timer(&moxaTimer
, jiffies
+ HZ
/ 50);
1521 spin_unlock(&moxa_lock
);
1524 /******************************************************************************/
1526 static void moxa_set_tty_param(struct tty_struct
*tty
, struct ktermios
*old_termios
)
1528 register struct ktermios
*ts
= tty
->termios
;
1529 struct moxa_port
*ch
= tty
->driver_data
;
1530 int rts
, cts
, txflow
, rxflow
, xany
, baud
;
1532 rts
= cts
= txflow
= rxflow
= xany
= 0;
1533 if (ts
->c_cflag
& CRTSCTS
)
1535 if (ts
->c_iflag
& IXON
)
1537 if (ts
->c_iflag
& IXOFF
)
1539 if (ts
->c_iflag
& IXANY
)
1542 /* Clear the features we don't support */
1543 ts
->c_cflag
&= ~CMSPAR
;
1544 MoxaPortFlowCtrl(ch
, rts
, cts
, txflow
, rxflow
, xany
);
1545 baud
= MoxaPortSetTermio(ch
, ts
, tty_get_baud_rate(tty
));
1547 baud
= tty_termios_baud_rate(old_termios
);
1548 /* Not put the baud rate into the termios data */
1549 tty_encode_baud_rate(tty
, baud
, baud
);
1552 static void moxa_setup_empty_event(struct tty_struct
*tty
)
1554 struct moxa_port
*ch
= tty
->driver_data
;
1556 spin_lock_bh(&moxa_lock
);
1557 ch
->statusflags
|= EMPTYWAIT
;
1558 spin_unlock_bh(&moxa_lock
);
1561 static void moxa_shut_down(struct moxa_port
*ch
)
1563 struct tty_struct
*tp
= ch
->tty
;
1565 if (!(ch
->asyncflags
& ASYNC_INITIALIZED
))
1568 MoxaPortDisable(ch
);
1571 * If we're a modem control device and HUPCL is on, drop RTS & DTR.
1574 MoxaPortLineCtrl(ch
, 0, 0);
1576 spin_lock_bh(&moxa_lock
);
1577 ch
->asyncflags
&= ~ASYNC_INITIALIZED
;
1578 spin_unlock_bh(&moxa_lock
);
1581 /*****************************************************************************
1582 * Driver level functions: *
1583 *****************************************************************************/
1585 static void MoxaPortFlushData(struct moxa_port
*port
, int mode
)
1587 void __iomem
*ofsAddr
;
1588 if (mode
< 0 || mode
> 2)
1590 ofsAddr
= port
->tableAddr
;
1591 moxafunc(ofsAddr
, FC_FlushQueue
, mode
);
1593 port
->lowChkFlag
= 0;
1594 moxa_low_water_check(ofsAddr
);
1599 * Moxa Port Number Description:
1601 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
1602 * the port number using in MOXA driver functions will be 0 to 31 for
1603 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
1604 * to 127 for fourth. For example, if you setup three MOXA boards,
1605 * first board is C218, second board is C320-16 and third board is
1606 * C320-32. The port number of first board (C218 - 8 ports) is from
1607 * 0 to 7. The port number of second board (C320 - 16 ports) is form
1608 * 32 to 47. The port number of third board (C320 - 32 ports) is from
1609 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
1610 * 127 will be invalid.
1613 * Moxa Functions Description:
1615 * Function 1: Driver initialization routine, this routine must be
1616 * called when initialized driver.
1618 * void MoxaDriverInit();
1621 * Function 2: Moxa driver private IOCTL command processing.
1623 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
1625 * unsigned int cmd : IOCTL command
1626 * unsigned long arg : IOCTL argument
1627 * int port : port number (0 - 127)
1634 * Function 6: Enable this port to start Tx/Rx data.
1636 * void MoxaPortEnable(int port);
1637 * int port : port number (0 - 127)
1640 * Function 7: Disable this port
1642 * void MoxaPortDisable(int port);
1643 * int port : port number (0 - 127)
1646 * Function 10: Setting baud rate of this port.
1648 * speed_t MoxaPortSetBaud(int port, speed_t baud);
1649 * int port : port number (0 - 127)
1650 * long baud : baud rate (50 - 115200)
1652 * return: 0 : this port is invalid or baud < 50
1653 * 50 - 115200 : the real baud rate set to the port, if
1654 * the argument baud is large than maximun
1655 * available baud rate, the real setting
1656 * baud rate will be the maximun baud rate.
1659 * Function 12: Configure the port.
1661 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
1662 * int port : port number (0 - 127)
1663 * struct ktermios * termio : termio structure pointer
1664 * speed_t baud : baud rate
1666 * return: -1 : this port is invalid or termio == NULL
1670 * Function 13: Get the DTR/RTS state of this port.
1672 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
1673 * int port : port number (0 - 127)
1674 * int * dtrState : pointer to INT to receive the current DTR
1675 * state. (if NULL, this function will not
1676 * write to this address)
1677 * int * rtsState : pointer to INT to receive the current RTS
1678 * state. (if NULL, this function will not
1679 * write to this address)
1681 * return: -1 : this port is invalid
1685 * Function 14: Setting the DTR/RTS output state of this port.
1687 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
1688 * int port : port number (0 - 127)
1689 * int dtrState : DTR output state (0: off, 1: on)
1690 * int rtsState : RTS output state (0: off, 1: on)
1693 * Function 15: Setting the flow control of this port.
1695 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
1696 * int txFlow,int xany);
1697 * int port : port number (0 - 127)
1698 * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
1699 * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
1700 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
1701 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
1702 * int xany : S/W XANY flow control (0: no, 1: yes)
1705 * Function 16: Get ths line status of this port
1707 * int MoxaPortLineStatus(int port);
1708 * int port : port number (0 - 127)
1710 * return: Bit 0 - CTS state (0: off, 1: on)
1711 * Bit 1 - DSR state (0: off, 1: on)
1712 * Bit 2 - DCD state (0: off, 1: on)
1715 * Function 19: Flush the Rx/Tx buffer data of this port.
1717 * void MoxaPortFlushData(int port, int mode);
1718 * int port : port number (0 - 127)
1720 * 0 : flush the Rx buffer
1721 * 1 : flush the Tx buffer
1722 * 2 : flush the Rx and Tx buffer
1725 * Function 20: Write data.
1727 * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
1728 * int port : port number (0 - 127)
1729 * unsigned char * buffer : pointer to write data buffer.
1730 * int length : write data length
1732 * return: 0 - length : real write data length
1735 * Function 21: Read data.
1737 * int MoxaPortReadData(int port, struct tty_struct *tty);
1738 * int port : port number (0 - 127)
1739 * struct tty_struct *tty : tty for data
1741 * return: 0 - length : real read data length
1744 * Function 24: Get the Tx buffer current queued data bytes
1746 * int MoxaPortTxQueue(int port);
1747 * int port : port number (0 - 127)
1749 * return: .. : Tx buffer current queued data bytes
1752 * Function 25: Get the Tx buffer current free space
1754 * int MoxaPortTxFree(int port);
1755 * int port : port number (0 - 127)
1757 * return: .. : Tx buffer current free space
1760 * Function 26: Get the Rx buffer current queued data bytes
1762 * int MoxaPortRxQueue(int port);
1763 * int port : port number (0 - 127)
1765 * return: .. : Rx buffer current queued data bytes
1768 * Function 28: Disable port data transmission.
1770 * void MoxaPortTxDisable(int port);
1771 * int port : port number (0 - 127)
1774 * Function 29: Enable port data transmission.
1776 * void MoxaPortTxEnable(int port);
1777 * int port : port number (0 - 127)
1780 * Function 31: Get the received BREAK signal count and reset it.
1782 * int MoxaPortResetBrkCnt(int port);
1783 * int port : port number (0 - 127)
1785 * return: 0 - .. : BREAK signal count
1790 static void MoxaPortEnable(struct moxa_port
*port
)
1792 void __iomem
*ofsAddr
;
1795 ofsAddr
= port
->tableAddr
;
1796 writew(lowwater
, ofsAddr
+ Low_water
);
1797 if (MOXA_IS_320(port
->board
))
1798 moxafunc(ofsAddr
, FC_SetBreakIrq
, 0);
1800 writew(readw(ofsAddr
+ HostStat
) | WakeupBreak
,
1801 ofsAddr
+ HostStat
);
1803 moxafunc(ofsAddr
, FC_SetLineIrq
, Magic_code
);
1804 moxafunc(ofsAddr
, FC_FlushQueue
, 2);
1806 moxafunc(ofsAddr
, FC_EnableCH
, Magic_code
);
1807 MoxaPortLineStatus(port
);
1810 static void MoxaPortDisable(struct moxa_port
*port
)
1812 void __iomem
*ofsAddr
= port
->tableAddr
;
1814 moxafunc(ofsAddr
, FC_SetFlowCtl
, 0); /* disable flow control */
1815 moxafunc(ofsAddr
, FC_ClrLineIrq
, Magic_code
);
1816 writew(0, ofsAddr
+ HostStat
);
1817 moxafunc(ofsAddr
, FC_DisableCH
, Magic_code
);
1820 static speed_t
MoxaPortSetBaud(struct moxa_port
*port
, speed_t baud
)
1822 void __iomem
*ofsAddr
= port
->tableAddr
;
1823 unsigned int clock
, val
;
1826 max
= MOXA_IS_320(port
->board
) ? 460800 : 921600;
1833 moxafunc(ofsAddr
, FC_SetBaud
, val
);
1838 static int MoxaPortSetTermio(struct moxa_port
*port
, struct ktermios
*termio
,
1841 void __iomem
*ofsAddr
;
1845 ofsAddr
= port
->tableAddr
;
1846 cflag
= termio
->c_cflag
; /* termio->c_cflag */
1848 mode
= termio
->c_cflag
& CSIZE
;
1851 else if (mode
== CS6
)
1853 else if (mode
== CS7
)
1855 else if (mode
== CS8
)
1858 if (termio
->c_cflag
& CSTOPB
) {
1866 if (termio
->c_cflag
& PARENB
) {
1867 if (termio
->c_cflag
& PARODD
)
1874 moxafunc(ofsAddr
, FC_SetDataMode
, (u16
)mode
);
1876 if (MOXA_IS_320(port
->board
) && baud
>= 921600)
1879 baud
= MoxaPortSetBaud(port
, baud
);
1881 if (termio
->c_iflag
& (IXON
| IXOFF
| IXANY
)) {
1882 writeb(termio
->c_cc
[VSTART
], ofsAddr
+ FuncArg
);
1883 writeb(termio
->c_cc
[VSTOP
], ofsAddr
+ FuncArg1
);
1884 writeb(FC_SetXonXoff
, ofsAddr
+ FuncCode
);
1885 moxa_wait_finish(ofsAddr
);
1891 static int MoxaPortGetLineOut(struct moxa_port
*port
, int *dtrState
,
1895 *dtrState
= !!(port
->lineCtrl
& DTR_ON
);
1897 *rtsState
= !!(port
->lineCtrl
& RTS_ON
);
1902 static void MoxaPortLineCtrl(struct moxa_port
*port
, int dtr
, int rts
)
1910 port
->lineCtrl
= mode
;
1911 moxafunc(port
->tableAddr
, FC_LineControl
, mode
);
1914 static void MoxaPortFlowCtrl(struct moxa_port
*port
, int rts
, int cts
,
1915 int txflow
, int rxflow
, int txany
)
1920 mode
|= RTS_FlowCtl
;
1922 mode
|= CTS_FlowCtl
;
1929 moxafunc(port
->tableAddr
, FC_SetFlowCtl
, mode
);
1932 static int MoxaPortLineStatus(struct moxa_port
*port
)
1934 void __iomem
*ofsAddr
;
1937 ofsAddr
= port
->tableAddr
;
1938 if (MOXA_IS_320(port
->board
)) {
1939 moxafunc(ofsAddr
, FC_LineStatus
, 0);
1940 val
= readw(ofsAddr
+ FuncArg
);
1942 val
= readw(ofsAddr
+ FlagStat
) >> 4;
1947 spin_lock_bh(&moxa_lock
);
1948 moxa_new_dcdstate(port
, val
& 8);
1949 spin_unlock_bh(&moxa_lock
);
1954 static int MoxaPortWriteData(struct moxa_port
*port
,
1955 const unsigned char *buffer
, int len
)
1957 void __iomem
*baseAddr
, *ofsAddr
, *ofs
;
1958 unsigned int c
, total
;
1959 u16 head
, tail
, tx_mask
, spage
, epage
;
1960 u16 pageno
, pageofs
, bufhead
;
1962 ofsAddr
= port
->tableAddr
;
1963 baseAddr
= port
->board
->basemem
;
1964 tx_mask
= readw(ofsAddr
+ TX_mask
);
1965 spage
= readw(ofsAddr
+ Page_txb
);
1966 epage
= readw(ofsAddr
+ EndPage_txb
);
1967 tail
= readw(ofsAddr
+ TXwptr
);
1968 head
= readw(ofsAddr
+ TXrptr
);
1969 c
= (head
> tail
) ? (head
- tail
- 1) : (head
- tail
+ tx_mask
);
1972 moxaLog
.txcnt
[port
->tty
->index
] += c
;
1974 if (spage
== epage
) {
1975 bufhead
= readw(ofsAddr
+ Ofs_txb
);
1976 writew(spage
, baseAddr
+ Control_reg
);
1979 len
= head
- tail
- 1;
1981 len
= tx_mask
+ 1 - tail
;
1982 len
= (c
> len
) ? len
: c
;
1983 ofs
= baseAddr
+ DynPage_addr
+ bufhead
+ tail
;
1984 memcpy_toio(ofs
, buffer
, len
);
1986 tail
= (tail
+ len
) & tx_mask
;
1990 pageno
= spage
+ (tail
>> 13);
1991 pageofs
= tail
& Page_mask
;
1993 len
= Page_size
- pageofs
;
1996 writeb(pageno
, baseAddr
+ Control_reg
);
1997 ofs
= baseAddr
+ DynPage_addr
+ pageofs
;
1998 memcpy_toio(ofs
, buffer
, len
);
2000 if (++pageno
== epage
)
2005 tail
= (tail
+ total
) & tx_mask
;
2007 writew(tail
, ofsAddr
+ TXwptr
);
2008 writeb(1, ofsAddr
+ CD180TXirq
); /* start to send */
2012 static int MoxaPortReadData(struct moxa_port
*port
)
2014 struct tty_struct
*tty
= port
->tty
;
2016 void __iomem
*baseAddr
, *ofsAddr
, *ofs
;
2017 unsigned int count
, len
, total
;
2018 u16 tail
, rx_mask
, spage
, epage
;
2019 u16 pageno
, pageofs
, bufhead
, head
;
2021 ofsAddr
= port
->tableAddr
;
2022 baseAddr
= port
->board
->basemem
;
2023 head
= readw(ofsAddr
+ RXrptr
);
2024 tail
= readw(ofsAddr
+ RXwptr
);
2025 rx_mask
= readw(ofsAddr
+ RX_mask
);
2026 spage
= readw(ofsAddr
+ Page_rxb
);
2027 epage
= readw(ofsAddr
+ EndPage_rxb
);
2028 count
= (tail
>= head
) ? (tail
- head
) : (tail
- head
+ rx_mask
+ 1);
2033 moxaLog
.rxcnt
[tty
->index
] += total
;
2034 if (spage
== epage
) {
2035 bufhead
= readw(ofsAddr
+ Ofs_rxb
);
2036 writew(spage
, baseAddr
+ Control_reg
);
2038 ofs
= baseAddr
+ DynPage_addr
+ bufhead
+ head
;
2039 len
= (tail
>= head
) ? (tail
- head
) :
2040 (rx_mask
+ 1 - head
);
2041 len
= tty_prepare_flip_string(tty
, &dst
,
2043 memcpy_fromio(dst
, ofs
, len
);
2044 head
= (head
+ len
) & rx_mask
;
2048 pageno
= spage
+ (head
>> 13);
2049 pageofs
= head
& Page_mask
;
2051 writew(pageno
, baseAddr
+ Control_reg
);
2052 ofs
= baseAddr
+ DynPage_addr
+ pageofs
;
2053 len
= tty_prepare_flip_string(tty
, &dst
,
2054 min(Page_size
- pageofs
, count
));
2055 memcpy_fromio(dst
, ofs
, len
);
2058 pageofs
= (pageofs
+ len
) & Page_mask
;
2059 if (pageofs
== 0 && ++pageno
== epage
)
2062 head
= (head
+ total
) & rx_mask
;
2064 writew(head
, ofsAddr
+ RXrptr
);
2065 if (readb(ofsAddr
+ FlagStat
) & Xoff_state
) {
2066 moxaLowWaterChk
= 1;
2067 port
->lowChkFlag
= 1;
2073 static int MoxaPortTxQueue(struct moxa_port
*port
)
2075 void __iomem
*ofsAddr
= port
->tableAddr
;
2076 u16 rptr
, wptr
, mask
;
2078 rptr
= readw(ofsAddr
+ TXrptr
);
2079 wptr
= readw(ofsAddr
+ TXwptr
);
2080 mask
= readw(ofsAddr
+ TX_mask
);
2081 return (wptr
- rptr
) & mask
;
2084 static int MoxaPortTxFree(struct moxa_port
*port
)
2086 void __iomem
*ofsAddr
= port
->tableAddr
;
2087 u16 rptr
, wptr
, mask
;
2089 rptr
= readw(ofsAddr
+ TXrptr
);
2090 wptr
= readw(ofsAddr
+ TXwptr
);
2091 mask
= readw(ofsAddr
+ TX_mask
);
2092 return mask
- ((wptr
- rptr
) & mask
);
2095 static int MoxaPortRxQueue(struct moxa_port
*port
)
2097 void __iomem
*ofsAddr
= port
->tableAddr
;
2098 u16 rptr
, wptr
, mask
;
2100 rptr
= readw(ofsAddr
+ RXrptr
);
2101 wptr
= readw(ofsAddr
+ RXwptr
);
2102 mask
= readw(ofsAddr
+ RX_mask
);
2103 return (wptr
- rptr
) & mask
;
2106 static void MoxaPortTxDisable(struct moxa_port
*port
)
2108 moxafunc(port
->tableAddr
, FC_SetXoffState
, Magic_code
);
2111 static void MoxaPortTxEnable(struct moxa_port
*port
)
2113 moxafunc(port
->tableAddr
, FC_SetXonState
, Magic_code
);
2116 static int moxa_get_serial_info(struct moxa_port
*info
,
2117 struct serial_struct __user
*retinfo
)
2119 struct serial_struct tmp
= {
2121 .line
= info
->tty
->index
,
2122 .flags
= info
->asyncflags
,
2123 .baud_base
= 921600,
2124 .close_delay
= info
->close_delay
2126 return copy_to_user(retinfo
, &tmp
, sizeof(*retinfo
)) ? -EFAULT
: 0;
2130 static int moxa_set_serial_info(struct moxa_port
*info
,
2131 struct serial_struct __user
*new_info
)
2133 struct serial_struct new_serial
;
2135 if (copy_from_user(&new_serial
, new_info
, sizeof(new_serial
)))
2138 if (new_serial
.irq
!= 0 || new_serial
.port
!= 0 ||
2139 new_serial
.custom_divisor
!= 0 ||
2140 new_serial
.baud_base
!= 921600)
2143 if (!capable(CAP_SYS_ADMIN
)) {
2144 if (((new_serial
.flags
& ~ASYNC_USR_MASK
) !=
2145 (info
->asyncflags
& ~ASYNC_USR_MASK
)))
2148 info
->close_delay
= new_serial
.close_delay
* HZ
/ 100;
2150 new_serial
.flags
= (new_serial
.flags
& ~ASYNC_FLAGS
);
2151 new_serial
.flags
|= (info
->asyncflags
& ASYNC_FLAGS
);
2153 MoxaSetFifo(info
, new_serial
.type
== PORT_16550A
);
2155 info
->type
= new_serial
.type
;
2161 /*****************************************************************************
2162 * Static local functions: *
2163 *****************************************************************************/
2165 static void MoxaSetFifo(struct moxa_port
*port
, int enable
)
2167 void __iomem
*ofsAddr
= port
->tableAddr
;
2170 moxafunc(ofsAddr
, FC_SetRxFIFOTrig
, 0);
2171 moxafunc(ofsAddr
, FC_SetTxFIFOCnt
, 1);
2173 moxafunc(ofsAddr
, FC_SetRxFIFOTrig
, 3);
2174 moxafunc(ofsAddr
, FC_SetTxFIFOCnt
, 16);