1 /*****************************************************************************/
4 * istallion.c -- stallion intelligent multiport serial driver.
6 * Copyright (C) 1996-1999 Stallion Technologies
7 * Copyright (C) 1994-1996 Greg Ungerer.
9 * This code is loosely based on the Linux serial driver, written by
10 * Linus Torvalds, Theodore T'so and others.
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
19 /*****************************************************************************/
21 #include <linux/module.h>
22 #include <linux/slab.h>
23 #include <linux/interrupt.h>
24 #include <linux/tty.h>
25 #include <linux/tty_flip.h>
26 #include <linux/serial.h>
27 #include <linux/cdk.h>
28 #include <linux/comstats.h>
29 #include <linux/istallion.h>
30 #include <linux/ioport.h>
31 #include <linux/delay.h>
32 #include <linux/init.h>
33 #include <linux/device.h>
34 #include <linux/wait.h>
35 #include <linux/eisa.h>
36 #include <linux/ctype.h>
39 #include <asm/uaccess.h>
41 #include <linux/pci.h>
43 /*****************************************************************************/
46 * Define different board types. Not all of the following board types
47 * are supported by this driver. But I will use the standard "assigned"
48 * board numbers. Currently supported boards are abbreviated as:
49 * ECP = EasyConnection 8/64, ONB = ONboard, BBY = Brumby and
53 #define BRD_STALLION 1
55 #define BRD_ONBOARD2 3
57 #define BRD_ONBOARDE 7
63 #define BRD_BRUMBY BRD_BRUMBY4
66 * Define a configuration structure to hold the board configuration.
67 * Need to set this up in the code (for now) with the boards that are
68 * to be configured into the system. This is what needs to be modified
69 * when adding/removing/modifying boards. Each line entry in the
70 * stli_brdconf[] array is a board. Each line contains io/irq/memory
71 * ranges for that board (as well as what type of board it is).
73 * { BRD_ECP, 0x2a0, 0, 0xcc000, 0, 0 },
74 * This line will configure an EasyConnection 8/64 at io address 2a0,
75 * and shared memory address of cc000. Multiple EasyConnection 8/64
76 * boards can share the same shared memory address space. No interrupt
77 * is required for this board type.
79 * { BRD_ECPE, 0x5000, 0, 0x80000000, 0, 0 },
80 * This line will configure an EasyConnection 8/64 EISA in slot 5 and
81 * shared memory address of 0x80000000 (2 GByte). Multiple
82 * EasyConnection 8/64 EISA boards can share the same shared memory
83 * address space. No interrupt is required for this board type.
85 * { BRD_ONBOARD, 0x240, 0, 0xd0000, 0, 0 },
86 * This line will configure an ONboard (ISA type) at io address 240,
87 * and shared memory address of d0000. Multiple ONboards can share
88 * the same shared memory address space. No interrupt required.
90 * { BRD_BRUMBY4, 0x360, 0, 0xc8000, 0, 0 },
91 * This line will configure a Brumby board (any number of ports!) at
92 * io address 360 and shared memory address of c8000. All Brumby boards
93 * configured into a system must have their own separate io and memory
94 * addresses. No interrupt is required.
96 * { BRD_STALLION, 0x330, 0, 0xd0000, 0, 0 },
97 * This line will configure an original Stallion board at io address 330
98 * and shared memory address d0000 (this would only be valid for a "V4.0"
99 * or Rev.O Stallion board). All Stallion boards configured into the
100 * system must have their own separate io and memory addresses. No
101 * interrupt is required.
108 unsigned long memaddr;
113 static int stli_nrbrds;
115 /* stli_lock must NOT be taken holding brd_lock */
116 static spinlock_t stli_lock; /* TTY logic lock */
117 static spinlock_t brd_lock; /* Board logic lock */
120 * There is some experimental EISA board detection code in this driver.
121 * By default it is disabled, but for those that want to try it out,
122 * then set the define below to be 1.
124 #define STLI_EISAPROBE 0
126 /*****************************************************************************/
129 * Define some important driver characteristics. Device major numbers
130 * allocated as per Linux Device Registry.
132 #ifndef STL_SIOMEMMAJOR
133 #define STL_SIOMEMMAJOR 28
135 #ifndef STL_SERIALMAJOR
136 #define STL_SERIALMAJOR 24
138 #ifndef STL_CALLOUTMAJOR
139 #define STL_CALLOUTMAJOR 25
142 /*****************************************************************************/
145 * Define our local driver identity first. Set up stuff to deal with
146 * all the local structures required by a serial tty driver.
148 static char *stli_drvtitle = "Stallion Intelligent Multiport Serial Driver";
149 static char *stli_drvname = "istallion";
150 static char *stli_drvversion = "5.6.0";
151 static char *stli_serialname = "ttyE";
153 static struct tty_driver *stli_serial;
156 #define STLI_TXBUFSIZE 4096
159 * Use a fast local buffer for cooked characters. Typically a whole
160 * bunch of cooked characters come in for a port, 1 at a time. So we
161 * save those up into a local buffer, then write out the whole lot
162 * with a large memcpy. Just use 1 buffer for all ports, since its
163 * use it is only need for short periods of time by each port.
165 static char *stli_txcookbuf;
166 static int stli_txcooksize;
167 static int stli_txcookrealsize;
168 static struct tty_struct *stli_txcooktty;
171 * Define a local default termios struct. All ports will be created
172 * with this termios initially. Basically all it defines is a raw port
173 * at 9600 baud, 8 data bits, no parity, 1 stop bit.
175 static struct ktermios stli_deftermios = {
176 .c_cflag = (B9600 | CS8 | CREAD | HUPCL | CLOCAL),
183 * Define global stats structures. Not used often, and can be
184 * re-used for each stats call.
186 static comstats_t stli_comstats;
187 static combrd_t stli_brdstats;
188 static struct asystats stli_cdkstats;
189 static struct stlibrd stli_dummybrd;
190 static struct stliport stli_dummyport;
192 /*****************************************************************************/
194 static struct stlibrd *stli_brds[STL_MAXBRDS];
196 static int stli_shared;
199 * Per board state flags. Used with the state field of the board struct.
200 * Not really much here... All we need to do is keep track of whether
201 * the board has been detected, and whether it is actually running a slave
204 #define BST_FOUND 0x1
205 #define BST_STARTED 0x2
208 * Define the set of port state flags. These are marked for internal
209 * state purposes only, usually to do with the state of communications
210 * with the slave. Most of them need to be updated atomically, so always
211 * use the bit setting operations (unless protected by cli/sti).
213 #define ST_INITIALIZING 1
219 #define ST_DOFLUSHRX 7
220 #define ST_DOFLUSHTX 8
223 #define ST_GETSIGS 11
226 * Define an array of board names as printable strings. Handy for
227 * referencing boards when printing trace and stuff.
229 static char *stli_brdnames[] = {
262 /*****************************************************************************/
265 * Define some string labels for arguments passed from the module
266 * load line. These allow for easy board definitions, and easy
267 * modification of the io, memory and irq resoucres.
270 static char *board0[8];
271 static char *board1[8];
272 static char *board2[8];
273 static char *board3[8];
275 static char **stli_brdsp[] = {
283 * Define a set of common board names, and types. This is used to
284 * parse any module arguments.
287 static struct stlibrdtype {
291 { "stallion", BRD_STALLION },
292 { "1", BRD_STALLION },
293 { "brumby", BRD_BRUMBY },
294 { "brumby4", BRD_BRUMBY },
295 { "brumby/4", BRD_BRUMBY },
296 { "brumby-4", BRD_BRUMBY },
297 { "brumby8", BRD_BRUMBY },
298 { "brumby/8", BRD_BRUMBY },
299 { "brumby-8", BRD_BRUMBY },
300 { "brumby16", BRD_BRUMBY },
301 { "brumby/16", BRD_BRUMBY },
302 { "brumby-16", BRD_BRUMBY },
304 { "onboard2", BRD_ONBOARD2 },
305 { "onboard-2", BRD_ONBOARD2 },
306 { "onboard/2", BRD_ONBOARD2 },
307 { "onboard-mc", BRD_ONBOARD2 },
308 { "onboard/mc", BRD_ONBOARD2 },
309 { "onboard-mca", BRD_ONBOARD2 },
310 { "onboard/mca", BRD_ONBOARD2 },
311 { "3", BRD_ONBOARD2 },
312 { "onboard", BRD_ONBOARD },
313 { "onboardat", BRD_ONBOARD },
314 { "4", BRD_ONBOARD },
315 { "onboarde", BRD_ONBOARDE },
316 { "onboard-e", BRD_ONBOARDE },
317 { "onboard/e", BRD_ONBOARDE },
318 { "onboard-ei", BRD_ONBOARDE },
319 { "onboard/ei", BRD_ONBOARDE },
320 { "7", BRD_ONBOARDE },
322 { "ecpat", BRD_ECP },
323 { "ec8/64", BRD_ECP },
324 { "ec8/64-at", BRD_ECP },
325 { "ec8/64-isa", BRD_ECP },
327 { "ecpe", BRD_ECPE },
328 { "ecpei", BRD_ECPE },
329 { "ec8/64-e", BRD_ECPE },
330 { "ec8/64-ei", BRD_ECPE },
332 { "ecpmc", BRD_ECPMC },
333 { "ec8/64-mc", BRD_ECPMC },
334 { "ec8/64-mca", BRD_ECPMC },
336 { "ecppci", BRD_ECPPCI },
337 { "ec/ra", BRD_ECPPCI },
338 { "ec/ra-pc", BRD_ECPPCI },
339 { "ec/ra-pci", BRD_ECPPCI },
340 { "29", BRD_ECPPCI },
344 * Define the module agruments.
346 MODULE_AUTHOR("Greg Ungerer");
347 MODULE_DESCRIPTION("Stallion Intelligent Multiport Serial Driver");
348 MODULE_LICENSE("GPL");
351 module_param_array(board0, charp, NULL, 0);
352 MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,memaddr]");
353 module_param_array(board1, charp, NULL, 0);
354 MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,memaddr]");
355 module_param_array(board2, charp, NULL, 0);
356 MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,memaddr]");
357 module_param_array(board3, charp, NULL, 0);
358 MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,memaddr]");
361 * Set up a default memory address table for EISA board probing.
362 * The default addresses are all bellow 1Mbyte, which has to be the
363 * case anyway. They should be safe, since we only read values from
364 * them, and interrupts are disabled while we do it. If the higher
365 * memory support is compiled in then we also try probing around
366 * the 1Gb, 2Gb and 3Gb areas as well...
368 static unsigned long stli_eisamemprobeaddrs[] = {
369 0xc0000, 0xd0000, 0xe0000, 0xf0000,
370 0x80000000, 0x80010000, 0x80020000, 0x80030000,
371 0x40000000, 0x40010000, 0x40020000, 0x40030000,
372 0xc0000000, 0xc0010000, 0xc0020000, 0xc0030000,
373 0xff000000, 0xff010000, 0xff020000, 0xff030000,
376 static int stli_eisamempsize = ARRAY_SIZE(stli_eisamemprobeaddrs);
379 * Define the Stallion PCI vendor and device IDs.
381 #ifndef PCI_DEVICE_ID_ECRA
382 #define PCI_DEVICE_ID_ECRA 0x0004
385 static struct pci_device_id istallion_pci_tbl[] = {
386 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECRA), },
389 MODULE_DEVICE_TABLE(pci, istallion_pci_tbl);
391 static struct pci_driver stli_pcidriver;
393 /*****************************************************************************/
396 * Hardware configuration info for ECP boards. These defines apply
397 * to the directly accessible io ports of the ECP. There is a set of
398 * defines for each ECP board type, ISA, EISA, MCA and PCI.
402 #define ECP_MEMSIZE (128 * 1024)
403 #define ECP_PCIMEMSIZE (256 * 1024)
405 #define ECP_ATPAGESIZE (4 * 1024)
406 #define ECP_MCPAGESIZE (4 * 1024)
407 #define ECP_EIPAGESIZE (64 * 1024)
408 #define ECP_PCIPAGESIZE (64 * 1024)
410 #define STL_EISAID 0x8c4e
413 * Important defines for the ISA class of ECP board.
416 #define ECP_ATCONFR 1
417 #define ECP_ATMEMAR 2
418 #define ECP_ATMEMPR 3
419 #define ECP_ATSTOP 0x1
420 #define ECP_ATINTENAB 0x10
421 #define ECP_ATENABLE 0x20
422 #define ECP_ATDISABLE 0x00
423 #define ECP_ATADDRMASK 0x3f000
424 #define ECP_ATADDRSHFT 12
427 * Important defines for the EISA class of ECP board.
430 #define ECP_EIMEMARL 1
431 #define ECP_EICONFR 2
432 #define ECP_EIMEMARH 3
433 #define ECP_EIENABLE 0x1
434 #define ECP_EIDISABLE 0x0
435 #define ECP_EISTOP 0x4
436 #define ECP_EIEDGE 0x00
437 #define ECP_EILEVEL 0x80
438 #define ECP_EIADDRMASKL 0x00ff0000
439 #define ECP_EIADDRSHFTL 16
440 #define ECP_EIADDRMASKH 0xff000000
441 #define ECP_EIADDRSHFTH 24
442 #define ECP_EIBRDENAB 0xc84
444 #define ECP_EISAID 0x4
447 * Important defines for the Micro-channel class of ECP board.
448 * (It has a lot in common with the ISA boards.)
451 #define ECP_MCCONFR 1
452 #define ECP_MCSTOP 0x20
453 #define ECP_MCENABLE 0x80
454 #define ECP_MCDISABLE 0x00
457 * Important defines for the PCI class of ECP board.
458 * (It has a lot in common with the other ECP boards.)
460 #define ECP_PCIIREG 0
461 #define ECP_PCICONFR 1
462 #define ECP_PCISTOP 0x01
465 * Hardware configuration info for ONboard and Brumby boards. These
466 * defines apply to the directly accessible io ports of these boards.
468 #define ONB_IOSIZE 16
469 #define ONB_MEMSIZE (64 * 1024)
470 #define ONB_ATPAGESIZE (64 * 1024)
471 #define ONB_MCPAGESIZE (64 * 1024)
472 #define ONB_EIMEMSIZE (128 * 1024)
473 #define ONB_EIPAGESIZE (64 * 1024)
476 * Important defines for the ISA class of ONboard board.
479 #define ONB_ATMEMAR 1
480 #define ONB_ATCONFR 2
481 #define ONB_ATSTOP 0x4
482 #define ONB_ATENABLE 0x01
483 #define ONB_ATDISABLE 0x00
484 #define ONB_ATADDRMASK 0xff0000
485 #define ONB_ATADDRSHFT 16
487 #define ONB_MEMENABLO 0
488 #define ONB_MEMENABHI 0x02
491 * Important defines for the EISA class of ONboard board.
494 #define ONB_EIMEMARL 1
495 #define ONB_EICONFR 2
496 #define ONB_EIMEMARH 3
497 #define ONB_EIENABLE 0x1
498 #define ONB_EIDISABLE 0x0
499 #define ONB_EISTOP 0x4
500 #define ONB_EIEDGE 0x00
501 #define ONB_EILEVEL 0x80
502 #define ONB_EIADDRMASKL 0x00ff0000
503 #define ONB_EIADDRSHFTL 16
504 #define ONB_EIADDRMASKH 0xff000000
505 #define ONB_EIADDRSHFTH 24
506 #define ONB_EIBRDENAB 0xc84
508 #define ONB_EISAID 0x1
511 * Important defines for the Brumby boards. They are pretty simple,
512 * there is not much that is programmably configurable.
514 #define BBY_IOSIZE 16
515 #define BBY_MEMSIZE (64 * 1024)
516 #define BBY_PAGESIZE (16 * 1024)
519 #define BBY_ATCONFR 1
520 #define BBY_ATSTOP 0x4
523 * Important defines for the Stallion boards. They are pretty simple,
524 * there is not much that is programmably configurable.
526 #define STAL_IOSIZE 16
527 #define STAL_MEMSIZE (64 * 1024)
528 #define STAL_PAGESIZE (64 * 1024)
531 * Define the set of status register values for EasyConnection panels.
532 * The signature will return with the status value for each panel. From
533 * this we can determine what is attached to the board - before we have
534 * actually down loaded any code to it.
536 #define ECH_PNLSTATUS 2
537 #define ECH_PNL16PORT 0x20
538 #define ECH_PNLIDMASK 0x07
539 #define ECH_PNLXPID 0x40
540 #define ECH_PNLINTRPEND 0x80
543 * Define some macros to do things to the board. Even those these boards
544 * are somewhat related there is often significantly different ways of
545 * doing some operation on it (like enable, paging, reset, etc). So each
546 * board class has a set of functions which do the commonly required
547 * operations. The macros below basically just call these functions,
548 * generally checking for a NULL function - which means that the board
549 * needs nothing done to it to achieve this operation!
551 #define EBRDINIT(brdp) \
552 if (brdp->init != NULL) \
555 #define EBRDENABLE(brdp) \
556 if (brdp->enable != NULL) \
557 (* brdp->enable)(brdp);
559 #define EBRDDISABLE(brdp) \
560 if (brdp->disable != NULL) \
561 (* brdp->disable)(brdp);
563 #define EBRDINTR(brdp) \
564 if (brdp->intr != NULL) \
565 (* brdp->intr)(brdp);
567 #define EBRDRESET(brdp) \
568 if (brdp->reset != NULL) \
569 (* brdp->reset)(brdp);
571 #define EBRDGETMEMPTR(brdp,offset) \
572 (* brdp->getmemptr)(brdp, offset, __LINE__)
575 * Define the maximal baud rate, and the default baud base for ports.
577 #define STL_MAXBAUD 460800
578 #define STL_BAUDBASE 115200
579 #define STL_CLOSEDELAY (5 * HZ / 10)
581 /*****************************************************************************/
584 * Define macros to extract a brd or port number from a minor number.
586 #define MINOR2BRD(min) (((min) & 0xc0) >> 6)
587 #define MINOR2PORT(min) ((min) & 0x3f)
589 /*****************************************************************************/
592 * Prototype all functions in this driver!
595 static int stli_parsebrd(struct stlconf *confp, char **argp);
596 static int stli_init(void);
597 static int stli_open(struct tty_struct *tty, struct file *filp);
598 static void stli_close(struct tty_struct *tty, struct file *filp);
599 static int stli_write(struct tty_struct *tty, const unsigned char *buf, int count);
600 static void stli_putchar(struct tty_struct *tty, unsigned char ch);
601 static void stli_flushchars(struct tty_struct *tty);
602 static int stli_writeroom(struct tty_struct *tty);
603 static int stli_charsinbuffer(struct tty_struct *tty);
604 static int stli_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg);
605 static void stli_settermios(struct tty_struct *tty, struct ktermios *old);
606 static void stli_throttle(struct tty_struct *tty);
607 static void stli_unthrottle(struct tty_struct *tty);
608 static void stli_stop(struct tty_struct *tty);
609 static void stli_start(struct tty_struct *tty);
610 static void stli_flushbuffer(struct tty_struct *tty);
611 static void stli_breakctl(struct tty_struct *tty, int state);
612 static void stli_waituntilsent(struct tty_struct *tty, int timeout);
613 static void stli_sendxchar(struct tty_struct *tty, char ch);
614 static void stli_hangup(struct tty_struct *tty);
615 static int stli_portinfo(struct stlibrd *brdp, struct stliport *portp, int portnr, char *pos);
617 static int stli_brdinit(struct stlibrd *brdp);
618 static int stli_startbrd(struct stlibrd *brdp);
619 static ssize_t stli_memread(struct file *fp, char __user *buf, size_t count, loff_t *offp);
620 static ssize_t stli_memwrite(struct file *fp, const char __user *buf, size_t count, loff_t *offp);
621 static int stli_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg);
622 static void stli_brdpoll(struct stlibrd *brdp, cdkhdr_t __iomem *hdrp);
623 static void stli_poll(unsigned long arg);
624 static int stli_hostcmd(struct stlibrd *brdp, struct stliport *portp);
625 static int stli_initopen(struct stlibrd *brdp, struct stliport *portp);
626 static int stli_rawopen(struct stlibrd *brdp, struct stliport *portp, unsigned long arg, int wait);
627 static int stli_rawclose(struct stlibrd *brdp, struct stliport *portp, unsigned long arg, int wait);
628 static int stli_waitcarrier(struct stlibrd *brdp, struct stliport *portp, struct file *filp);
629 static void stli_dohangup(struct work_struct *);
630 static int stli_setport(struct stliport *portp);
631 static int stli_cmdwait(struct stlibrd *brdp, struct stliport *portp, unsigned long cmd, void *arg, int size, int copyback);
632 static void stli_sendcmd(struct stlibrd *brdp, struct stliport *portp, unsigned long cmd, void *arg, int size, int copyback);
633 static void __stli_sendcmd(struct stlibrd *brdp, struct stliport *portp, unsigned long cmd, void *arg, int size, int copyback);
634 static void stli_dodelaycmd(struct stliport *portp, cdkctrl_t __iomem *cp);
635 static void stli_mkasyport(struct stliport *portp, asyport_t *pp, struct ktermios *tiosp);
636 static void stli_mkasysigs(asysigs_t *sp, int dtr, int rts);
637 static long stli_mktiocm(unsigned long sigvalue);
638 static void stli_read(struct stlibrd *brdp, struct stliport *portp);
639 static int stli_getserial(struct stliport *portp, struct serial_struct __user *sp);
640 static int stli_setserial(struct stliport *portp, struct serial_struct __user *sp);
641 static int stli_getbrdstats(combrd_t __user *bp);
642 static int stli_getportstats(struct stliport *portp, comstats_t __user *cp);
643 static int stli_portcmdstats(struct stliport *portp);
644 static int stli_clrportstats(struct stliport *portp, comstats_t __user *cp);
645 static int stli_getportstruct(struct stliport __user *arg);
646 static int stli_getbrdstruct(struct stlibrd __user *arg);
647 static struct stlibrd *stli_allocbrd(void);
649 static void stli_ecpinit(struct stlibrd *brdp);
650 static void stli_ecpenable(struct stlibrd *brdp);
651 static void stli_ecpdisable(struct stlibrd *brdp);
652 static void __iomem *stli_ecpgetmemptr(struct stlibrd *brdp, unsigned long offset, int line);
653 static void stli_ecpreset(struct stlibrd *brdp);
654 static void stli_ecpintr(struct stlibrd *brdp);
655 static void stli_ecpeiinit(struct stlibrd *brdp);
656 static void stli_ecpeienable(struct stlibrd *brdp);
657 static void stli_ecpeidisable(struct stlibrd *brdp);
658 static void __iomem *stli_ecpeigetmemptr(struct stlibrd *brdp, unsigned long offset, int line);
659 static void stli_ecpeireset(struct stlibrd *brdp);
660 static void stli_ecpmcenable(struct stlibrd *brdp);
661 static void stli_ecpmcdisable(struct stlibrd *brdp);
662 static void __iomem *stli_ecpmcgetmemptr(struct stlibrd *brdp, unsigned long offset, int line);
663 static void stli_ecpmcreset(struct stlibrd *brdp);
664 static void stli_ecppciinit(struct stlibrd *brdp);
665 static void __iomem *stli_ecppcigetmemptr(struct stlibrd *brdp, unsigned long offset, int line);
666 static void stli_ecppcireset(struct stlibrd *brdp);
668 static void stli_onbinit(struct stlibrd *brdp);
669 static void stli_onbenable(struct stlibrd *brdp);
670 static void stli_onbdisable(struct stlibrd *brdp);
671 static void __iomem *stli_onbgetmemptr(struct stlibrd *brdp, unsigned long offset, int line);
672 static void stli_onbreset(struct stlibrd *brdp);
673 static void stli_onbeinit(struct stlibrd *brdp);
674 static void stli_onbeenable(struct stlibrd *brdp);
675 static void stli_onbedisable(struct stlibrd *brdp);
676 static void __iomem *stli_onbegetmemptr(struct stlibrd *brdp, unsigned long offset, int line);
677 static void stli_onbereset(struct stlibrd *brdp);
678 static void stli_bbyinit(struct stlibrd *brdp);
679 static void __iomem *stli_bbygetmemptr(struct stlibrd *brdp, unsigned long offset, int line);
680 static void stli_bbyreset(struct stlibrd *brdp);
681 static void stli_stalinit(struct stlibrd *brdp);
682 static void __iomem *stli_stalgetmemptr(struct stlibrd *brdp, unsigned long offset, int line);
683 static void stli_stalreset(struct stlibrd *brdp);
685 static struct stliport *stli_getport(int brdnr, int panelnr, int portnr);
687 static int stli_initecp(struct stlibrd *brdp);
688 static int stli_initonb(struct stlibrd *brdp);
689 static int stli_eisamemprobe(struct stlibrd *brdp);
690 static int stli_initports(struct stlibrd *brdp);
692 /*****************************************************************************/
695 * Define the driver info for a user level shared memory device. This
696 * device will work sort of like the /dev/kmem device - except that it
697 * will give access to the shared memory on the Stallion intelligent
698 * board. This is also a very useful debugging tool.
700 static const struct file_operations stli_fsiomem = {
701 .owner = THIS_MODULE,
702 .read = stli_memread,
703 .write = stli_memwrite,
704 .ioctl = stli_memioctl,
707 /*****************************************************************************/
710 * Define a timer_list entry for our poll routine. The slave board
711 * is polled every so often to see if anything needs doing. This is
712 * much cheaper on host cpu than using interrupts. It turns out to
713 * not increase character latency by much either...
715 static DEFINE_TIMER(stli_timerlist, stli_poll, 0, 0);
717 static int stli_timeron;
720 * Define the calculation for the timeout routine.
722 #define STLI_TIMEOUT (jiffies + 1)
724 /*****************************************************************************/
726 static struct class *istallion_class;
728 static void stli_cleanup_ports(struct stlibrd *brdp)
730 struct stliport *portp;
733 for (j = 0; j < STL_MAXPORTS; j++) {
734 portp = brdp->ports[j];
736 if (portp->tty != NULL)
737 tty_hangup(portp->tty);
744 * Loadable module initialization stuff.
747 static int __init istallion_module_init(void)
753 /*****************************************************************************/
755 static void __exit istallion_module_exit(void)
757 struct stlibrd *brdp;
760 printk(KERN_INFO "Unloading %s: version %s\n", stli_drvtitle,
763 pci_unregister_driver(&stli_pcidriver);
765 * Free up all allocated resources used by the ports. This includes
766 * memory and interrupts.
770 del_timer_sync(&stli_timerlist);
773 i = tty_unregister_driver(stli_serial);
775 printk("STALLION: failed to un-register tty driver, "
779 put_tty_driver(stli_serial);
780 for (i = 0; i < 4; i++)
781 class_device_destroy(istallion_class, MKDEV(STL_SIOMEMMAJOR, i));
782 class_destroy(istallion_class);
783 if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem")))
784 printk("STALLION: failed to un-register serial memory device, "
787 kfree(stli_txcookbuf);
789 for (i = 0; (i < stli_nrbrds); i++) {
790 if ((brdp = stli_brds[i]) == NULL)
793 stli_cleanup_ports(brdp);
795 iounmap(brdp->membase);
796 if (brdp->iosize > 0)
797 release_region(brdp->iobase, brdp->iosize);
803 module_init(istallion_module_init);
804 module_exit(istallion_module_exit);
806 /*****************************************************************************/
809 * Parse the supplied argument string, into the board conf struct.
812 static int stli_parsebrd(struct stlconf *confp, char **argp)
817 if (argp[0] == NULL || *argp[0] == 0)
820 for (sp = argp[0], i = 0; ((*sp != 0) && (i < 25)); sp++, i++)
823 for (i = 0; i < ARRAY_SIZE(stli_brdstr); i++) {
824 if (strcmp(stli_brdstr[i].name, argp[0]) == 0)
827 if (i == ARRAY_SIZE(stli_brdstr)) {
828 printk("STALLION: unknown board name, %s?\n", argp[0]);
832 confp->brdtype = stli_brdstr[i].type;
833 if (argp[1] != NULL && *argp[1] != 0)
834 confp->ioaddr1 = simple_strtoul(argp[1], NULL, 0);
835 if (argp[2] != NULL && *argp[2] != 0)
836 confp->memaddr = simple_strtoul(argp[2], NULL, 0);
840 /*****************************************************************************/
842 static int stli_open(struct tty_struct *tty, struct file *filp)
844 struct stlibrd *brdp;
845 struct stliport *portp;
846 unsigned int minordev;
847 int brdnr, portnr, rc;
849 minordev = tty->index;
850 brdnr = MINOR2BRD(minordev);
851 if (brdnr >= stli_nrbrds)
853 brdp = stli_brds[brdnr];
856 if ((brdp->state & BST_STARTED) == 0)
858 portnr = MINOR2PORT(minordev);
859 if ((portnr < 0) || (portnr > brdp->nrports))
862 portp = brdp->ports[portnr];
865 if (portp->devnr < 1)
870 * Check if this port is in the middle of closing. If so then wait
871 * until it is closed then return error status based on flag settings.
872 * The sleep here does not need interrupt protection since the wakeup
873 * for it is done with the same context.
875 if (portp->flags & ASYNC_CLOSING) {
876 interruptible_sleep_on(&portp->close_wait);
877 if (portp->flags & ASYNC_HUP_NOTIFY)
883 * On the first open of the device setup the port hardware, and
884 * initialize the per port data structure. Since initializing the port
885 * requires several commands to the board we will need to wait for any
886 * other open that is already initializing the port.
889 tty->driver_data = portp;
892 wait_event_interruptible(portp->raw_wait,
893 !test_bit(ST_INITIALIZING, &portp->state));
894 if (signal_pending(current))
897 if ((portp->flags & ASYNC_INITIALIZED) == 0) {
898 set_bit(ST_INITIALIZING, &portp->state);
899 if ((rc = stli_initopen(brdp, portp)) >= 0) {
900 portp->flags |= ASYNC_INITIALIZED;
901 clear_bit(TTY_IO_ERROR, &tty->flags);
903 clear_bit(ST_INITIALIZING, &portp->state);
904 wake_up_interruptible(&portp->raw_wait);
910 * Check if this port is in the middle of closing. If so then wait
911 * until it is closed then return error status, based on flag settings.
912 * The sleep here does not need interrupt protection since the wakeup
913 * for it is done with the same context.
915 if (portp->flags & ASYNC_CLOSING) {
916 interruptible_sleep_on(&portp->close_wait);
917 if (portp->flags & ASYNC_HUP_NOTIFY)
923 * Based on type of open being done check if it can overlap with any
924 * previous opens still in effect. If we are a normal serial device
925 * then also we might have to wait for carrier.
927 if (!(filp->f_flags & O_NONBLOCK)) {
928 if ((rc = stli_waitcarrier(brdp, portp, filp)) != 0)
931 portp->flags |= ASYNC_NORMAL_ACTIVE;
935 /*****************************************************************************/
937 static void stli_close(struct tty_struct *tty, struct file *filp)
939 struct stlibrd *brdp;
940 struct stliport *portp;
943 portp = tty->driver_data;
947 spin_lock_irqsave(&stli_lock, flags);
948 if (tty_hung_up_p(filp)) {
949 spin_unlock_irqrestore(&stli_lock, flags);
952 if ((tty->count == 1) && (portp->refcount != 1))
954 if (portp->refcount-- > 1) {
955 spin_unlock_irqrestore(&stli_lock, flags);
959 portp->flags |= ASYNC_CLOSING;
962 * May want to wait for data to drain before closing. The BUSY flag
963 * keeps track of whether we are still transmitting or not. It is
964 * updated by messages from the slave - indicating when all chars
965 * really have drained.
967 if (tty == stli_txcooktty)
968 stli_flushchars(tty);
970 spin_unlock_irqrestore(&stli_lock, flags);
972 if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE)
973 tty_wait_until_sent(tty, portp->closing_wait);
975 portp->flags &= ~ASYNC_INITIALIZED;
976 brdp = stli_brds[portp->brdnr];
977 stli_rawclose(brdp, portp, 0, 0);
978 if (tty->termios->c_cflag & HUPCL) {
979 stli_mkasysigs(&portp->asig, 0, 0);
980 if (test_bit(ST_CMDING, &portp->state))
981 set_bit(ST_DOSIGS, &portp->state);
983 stli_sendcmd(brdp, portp, A_SETSIGNALS, &portp->asig,
984 sizeof(asysigs_t), 0);
986 clear_bit(ST_TXBUSY, &portp->state);
987 clear_bit(ST_RXSTOP, &portp->state);
988 set_bit(TTY_IO_ERROR, &tty->flags);
989 if (tty->ldisc.flush_buffer)
990 (tty->ldisc.flush_buffer)(tty);
991 set_bit(ST_DOFLUSHRX, &portp->state);
992 stli_flushbuffer(tty);
997 if (portp->openwaitcnt) {
998 if (portp->close_delay)
999 msleep_interruptible(jiffies_to_msecs(portp->close_delay));
1000 wake_up_interruptible(&portp->open_wait);
1003 portp->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
1004 wake_up_interruptible(&portp->close_wait);
1007 /*****************************************************************************/
1010 * Carry out first open operations on a port. This involves a number of
1011 * commands to be sent to the slave. We need to open the port, set the
1012 * notification events, set the initial port settings, get and set the
1013 * initial signal values. We sleep and wait in between each one. But
1014 * this still all happens pretty quickly.
1017 static int stli_initopen(struct stlibrd *brdp, struct stliport *portp)
1019 struct tty_struct *tty;
1024 if ((rc = stli_rawopen(brdp, portp, 0, 1)) < 0)
1027 memset(&nt, 0, sizeof(asynotify_t));
1028 nt.data = (DT_TXLOW | DT_TXEMPTY | DT_RXBUSY | DT_RXBREAK);
1030 if ((rc = stli_cmdwait(brdp, portp, A_SETNOTIFY, &nt,
1031 sizeof(asynotify_t), 0)) < 0)
1037 stli_mkasyport(portp, &aport, tty->termios);
1038 if ((rc = stli_cmdwait(brdp, portp, A_SETPORT, &aport,
1039 sizeof(asyport_t), 0)) < 0)
1042 set_bit(ST_GETSIGS, &portp->state);
1043 if ((rc = stli_cmdwait(brdp, portp, A_GETSIGNALS, &portp->asig,
1044 sizeof(asysigs_t), 1)) < 0)
1046 if (test_and_clear_bit(ST_GETSIGS, &portp->state))
1047 portp->sigs = stli_mktiocm(portp->asig.sigvalue);
1048 stli_mkasysigs(&portp->asig, 1, 1);
1049 if ((rc = stli_cmdwait(brdp, portp, A_SETSIGNALS, &portp->asig,
1050 sizeof(asysigs_t), 0)) < 0)
1056 /*****************************************************************************/
1059 * Send an open message to the slave. This will sleep waiting for the
1060 * acknowledgement, so must have user context. We need to co-ordinate
1061 * with close events here, since we don't want open and close events
1065 static int stli_rawopen(struct stlibrd *brdp, struct stliport *portp, unsigned long arg, int wait)
1067 cdkhdr_t __iomem *hdrp;
1068 cdkctrl_t __iomem *cp;
1069 unsigned char __iomem *bits;
1070 unsigned long flags;
1074 * Send a message to the slave to open this port.
1078 * Slave is already closing this port. This can happen if a hangup
1079 * occurs on this port. So we must wait until it is complete. The
1080 * order of opens and closes may not be preserved across shared
1081 * memory, so we must wait until it is complete.
1083 wait_event_interruptible(portp->raw_wait,
1084 !test_bit(ST_CLOSING, &portp->state));
1085 if (signal_pending(current)) {
1086 return -ERESTARTSYS;
1090 * Everything is ready now, so write the open message into shared
1091 * memory. Once the message is in set the service bits to say that
1092 * this port wants service.
1094 spin_lock_irqsave(&brd_lock, flags);
1096 cp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->ctrl;
1097 writel(arg, &cp->openarg);
1098 writeb(1, &cp->open);
1099 hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
1100 bits = ((unsigned char __iomem *) hdrp) + brdp->slaveoffset +
1102 writeb(readb(bits) | portp->portbit, bits);
1106 spin_unlock_irqrestore(&brd_lock, flags);
1111 * Slave is in action, so now we must wait for the open acknowledgment
1115 set_bit(ST_OPENING, &portp->state);
1116 spin_unlock_irqrestore(&brd_lock, flags);
1118 wait_event_interruptible(portp->raw_wait,
1119 !test_bit(ST_OPENING, &portp->state));
1120 if (signal_pending(current))
1123 if ((rc == 0) && (portp->rc != 0))
1128 /*****************************************************************************/
1131 * Send a close message to the slave. Normally this will sleep waiting
1132 * for the acknowledgement, but if wait parameter is 0 it will not. If
1133 * wait is true then must have user context (to sleep).
1136 static int stli_rawclose(struct stlibrd *brdp, struct stliport *portp, unsigned long arg, int wait)
1138 cdkhdr_t __iomem *hdrp;
1139 cdkctrl_t __iomem *cp;
1140 unsigned char __iomem *bits;
1141 unsigned long flags;
1145 * Slave is already closing this port. This can happen if a hangup
1146 * occurs on this port.
1149 wait_event_interruptible(portp->raw_wait,
1150 !test_bit(ST_CLOSING, &portp->state));
1151 if (signal_pending(current)) {
1152 return -ERESTARTSYS;
1157 * Write the close command into shared memory.
1159 spin_lock_irqsave(&brd_lock, flags);
1161 cp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->ctrl;
1162 writel(arg, &cp->closearg);
1163 writeb(1, &cp->close);
1164 hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
1165 bits = ((unsigned char __iomem *) hdrp) + brdp->slaveoffset +
1167 writeb(readb(bits) |portp->portbit, bits);
1170 set_bit(ST_CLOSING, &portp->state);
1171 spin_unlock_irqrestore(&brd_lock, flags);
1177 * Slave is in action, so now we must wait for the open acknowledgment
1181 wait_event_interruptible(portp->raw_wait,
1182 !test_bit(ST_CLOSING, &portp->state));
1183 if (signal_pending(current))
1186 if ((rc == 0) && (portp->rc != 0))
1191 /*****************************************************************************/
1194 * Send a command to the slave and wait for the response. This must
1195 * have user context (it sleeps). This routine is generic in that it
1196 * can send any type of command. Its purpose is to wait for that command
1197 * to complete (as opposed to initiating the command then returning).
1200 static int stli_cmdwait(struct stlibrd *brdp, struct stliport *portp, unsigned long cmd, void *arg, int size, int copyback)
1202 wait_event_interruptible(portp->raw_wait,
1203 !test_bit(ST_CMDING, &portp->state));
1204 if (signal_pending(current))
1205 return -ERESTARTSYS;
1207 stli_sendcmd(brdp, portp, cmd, arg, size, copyback);
1209 wait_event_interruptible(portp->raw_wait,
1210 !test_bit(ST_CMDING, &portp->state));
1211 if (signal_pending(current))
1212 return -ERESTARTSYS;
1219 /*****************************************************************************/
1222 * Send the termios settings for this port to the slave. This sleeps
1223 * waiting for the command to complete - so must have user context.
1226 static int stli_setport(struct stliport *portp)
1228 struct stlibrd *brdp;
1233 if (portp->tty == NULL)
1235 if (portp->brdnr < 0 && portp->brdnr >= stli_nrbrds)
1237 brdp = stli_brds[portp->brdnr];
1241 stli_mkasyport(portp, &aport, portp->tty->termios);
1242 return(stli_cmdwait(brdp, portp, A_SETPORT, &aport, sizeof(asyport_t), 0));
1245 /*****************************************************************************/
1248 * Possibly need to wait for carrier (DCD signal) to come high. Say
1249 * maybe because if we are clocal then we don't need to wait...
1252 static int stli_waitcarrier(struct stlibrd *brdp, struct stliport *portp, struct file *filp)
1254 unsigned long flags;
1260 if (portp->tty->termios->c_cflag & CLOCAL)
1263 spin_lock_irqsave(&stli_lock, flags);
1264 portp->openwaitcnt++;
1265 if (! tty_hung_up_p(filp))
1267 spin_unlock_irqrestore(&stli_lock, flags);
1270 stli_mkasysigs(&portp->asig, 1, 1);
1271 if ((rc = stli_cmdwait(brdp, portp, A_SETSIGNALS,
1272 &portp->asig, sizeof(asysigs_t), 0)) < 0)
1274 if (tty_hung_up_p(filp) ||
1275 ((portp->flags & ASYNC_INITIALIZED) == 0)) {
1276 if (portp->flags & ASYNC_HUP_NOTIFY)
1282 if (((portp->flags & ASYNC_CLOSING) == 0) &&
1283 (doclocal || (portp->sigs & TIOCM_CD))) {
1286 if (signal_pending(current)) {
1290 interruptible_sleep_on(&portp->open_wait);
1293 spin_lock_irqsave(&stli_lock, flags);
1294 if (! tty_hung_up_p(filp))
1296 portp->openwaitcnt--;
1297 spin_unlock_irqrestore(&stli_lock, flags);
1302 /*****************************************************************************/
1305 * Write routine. Take the data and put it in the shared memory ring
1306 * queue. If port is not already sending chars then need to mark the
1307 * service bits for this port.
1310 static int stli_write(struct tty_struct *tty, const unsigned char *buf, int count)
1312 cdkasy_t __iomem *ap;
1313 cdkhdr_t __iomem *hdrp;
1314 unsigned char __iomem *bits;
1315 unsigned char __iomem *shbuf;
1316 unsigned char *chbuf;
1317 struct stliport *portp;
1318 struct stlibrd *brdp;
1319 unsigned int len, stlen, head, tail, size;
1320 unsigned long flags;
1322 if (tty == stli_txcooktty)
1323 stli_flushchars(tty);
1324 portp = tty->driver_data;
1327 if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
1329 brdp = stli_brds[portp->brdnr];
1332 chbuf = (unsigned char *) buf;
1335 * All data is now local, shove as much as possible into shared memory.
1337 spin_lock_irqsave(&brd_lock, flags);
1339 ap = (cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr);
1340 head = (unsigned int) readw(&ap->txq.head);
1341 tail = (unsigned int) readw(&ap->txq.tail);
1342 if (tail != ((unsigned int) readw(&ap->txq.tail)))
1343 tail = (unsigned int) readw(&ap->txq.tail);
1344 size = portp->txsize;
1346 len = size - (head - tail) - 1;
1347 stlen = size - head;
1349 len = tail - head - 1;
1353 len = min(len, (unsigned int)count);
1355 shbuf = (char __iomem *) EBRDGETMEMPTR(brdp, portp->txoffset);
1358 stlen = min(len, stlen);
1359 memcpy_toio(shbuf + head, chbuf, stlen);
1370 ap = (cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr);
1371 writew(head, &ap->txq.head);
1372 if (test_bit(ST_TXBUSY, &portp->state)) {
1373 if (readl(&ap->changed.data) & DT_TXEMPTY)
1374 writel(readl(&ap->changed.data) & ~DT_TXEMPTY, &ap->changed.data);
1376 hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
1377 bits = ((unsigned char __iomem *) hdrp) + brdp->slaveoffset +
1379 writeb(readb(bits) | portp->portbit, bits);
1380 set_bit(ST_TXBUSY, &portp->state);
1382 spin_unlock_irqrestore(&brd_lock, flags);
1387 /*****************************************************************************/
1390 * Output a single character. We put it into a temporary local buffer
1391 * (for speed) then write out that buffer when the flushchars routine
1392 * is called. There is a safety catch here so that if some other port
1393 * writes chars before the current buffer has been, then we write them
1394 * first them do the new ports.
1397 static void stli_putchar(struct tty_struct *tty, unsigned char ch)
1399 if (tty != stli_txcooktty) {
1400 if (stli_txcooktty != NULL)
1401 stli_flushchars(stli_txcooktty);
1402 stli_txcooktty = tty;
1405 stli_txcookbuf[stli_txcooksize++] = ch;
1408 /*****************************************************************************/
1411 * Transfer characters from the local TX cooking buffer to the board.
1412 * We sort of ignore the tty that gets passed in here. We rely on the
1413 * info stored with the TX cook buffer to tell us which port to flush
1414 * the data on. In any case we clean out the TX cook buffer, for re-use
1418 static void stli_flushchars(struct tty_struct *tty)
1420 cdkhdr_t __iomem *hdrp;
1421 unsigned char __iomem *bits;
1422 cdkasy_t __iomem *ap;
1423 struct tty_struct *cooktty;
1424 struct stliport *portp;
1425 struct stlibrd *brdp;
1426 unsigned int len, stlen, head, tail, size, count, cooksize;
1428 unsigned char __iomem *shbuf;
1429 unsigned long flags;
1431 cooksize = stli_txcooksize;
1432 cooktty = stli_txcooktty;
1433 stli_txcooksize = 0;
1434 stli_txcookrealsize = 0;
1435 stli_txcooktty = NULL;
1439 if (cooktty == NULL)
1446 portp = tty->driver_data;
1449 if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
1451 brdp = stli_brds[portp->brdnr];
1455 spin_lock_irqsave(&brd_lock, flags);
1458 ap = (cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr);
1459 head = (unsigned int) readw(&ap->txq.head);
1460 tail = (unsigned int) readw(&ap->txq.tail);
1461 if (tail != ((unsigned int) readw(&ap->txq.tail)))
1462 tail = (unsigned int) readw(&ap->txq.tail);
1463 size = portp->txsize;
1465 len = size - (head - tail) - 1;
1466 stlen = size - head;
1468 len = tail - head - 1;
1472 len = min(len, cooksize);
1474 shbuf = EBRDGETMEMPTR(brdp, portp->txoffset);
1475 buf = stli_txcookbuf;
1478 stlen = min(len, stlen);
1479 memcpy_toio(shbuf + head, buf, stlen);
1490 ap = (cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr);
1491 writew(head, &ap->txq.head);
1493 if (test_bit(ST_TXBUSY, &portp->state)) {
1494 if (readl(&ap->changed.data) & DT_TXEMPTY)
1495 writel(readl(&ap->changed.data) & ~DT_TXEMPTY, &ap->changed.data);
1497 hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
1498 bits = ((unsigned char __iomem *) hdrp) + brdp->slaveoffset +
1500 writeb(readb(bits) | portp->portbit, bits);
1501 set_bit(ST_TXBUSY, &portp->state);
1504 spin_unlock_irqrestore(&brd_lock, flags);
1507 /*****************************************************************************/
1509 static int stli_writeroom(struct tty_struct *tty)
1511 cdkasyrq_t __iomem *rp;
1512 struct stliport *portp;
1513 struct stlibrd *brdp;
1514 unsigned int head, tail, len;
1515 unsigned long flags;
1517 if (tty == stli_txcooktty) {
1518 if (stli_txcookrealsize != 0) {
1519 len = stli_txcookrealsize - stli_txcooksize;
1524 portp = tty->driver_data;
1527 if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
1529 brdp = stli_brds[portp->brdnr];
1533 spin_lock_irqsave(&brd_lock, flags);
1535 rp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->txq;
1536 head = (unsigned int) readw(&rp->head);
1537 tail = (unsigned int) readw(&rp->tail);
1538 if (tail != ((unsigned int) readw(&rp->tail)))
1539 tail = (unsigned int) readw(&rp->tail);
1540 len = (head >= tail) ? (portp->txsize - (head - tail)) : (tail - head);
1543 spin_unlock_irqrestore(&brd_lock, flags);
1545 if (tty == stli_txcooktty) {
1546 stli_txcookrealsize = len;
1547 len -= stli_txcooksize;
1552 /*****************************************************************************/
1555 * Return the number of characters in the transmit buffer. Normally we
1556 * will return the number of chars in the shared memory ring queue.
1557 * We need to kludge around the case where the shared memory buffer is
1558 * empty but not all characters have drained yet, for this case just
1559 * return that there is 1 character in the buffer!
1562 static int stli_charsinbuffer(struct tty_struct *tty)
1564 cdkasyrq_t __iomem *rp;
1565 struct stliport *portp;
1566 struct stlibrd *brdp;
1567 unsigned int head, tail, len;
1568 unsigned long flags;
1570 if (tty == stli_txcooktty)
1571 stli_flushchars(tty);
1572 portp = tty->driver_data;
1575 if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
1577 brdp = stli_brds[portp->brdnr];
1581 spin_lock_irqsave(&brd_lock, flags);
1583 rp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->txq;
1584 head = (unsigned int) readw(&rp->head);
1585 tail = (unsigned int) readw(&rp->tail);
1586 if (tail != ((unsigned int) readw(&rp->tail)))
1587 tail = (unsigned int) readw(&rp->tail);
1588 len = (head >= tail) ? (head - tail) : (portp->txsize - (tail - head));
1589 if ((len == 0) && test_bit(ST_TXBUSY, &portp->state))
1592 spin_unlock_irqrestore(&brd_lock, flags);
1597 /*****************************************************************************/
1600 * Generate the serial struct info.
1603 static int stli_getserial(struct stliport *portp, struct serial_struct __user *sp)
1605 struct serial_struct sio;
1606 struct stlibrd *brdp;
1608 memset(&sio, 0, sizeof(struct serial_struct));
1609 sio.type = PORT_UNKNOWN;
1610 sio.line = portp->portnr;
1612 sio.flags = portp->flags;
1613 sio.baud_base = portp->baud_base;
1614 sio.close_delay = portp->close_delay;
1615 sio.closing_wait = portp->closing_wait;
1616 sio.custom_divisor = portp->custom_divisor;
1617 sio.xmit_fifo_size = 0;
1620 brdp = stli_brds[portp->brdnr];
1622 sio.port = brdp->iobase;
1624 return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ?
1628 /*****************************************************************************/
1631 * Set port according to the serial struct info.
1632 * At this point we do not do any auto-configure stuff, so we will
1633 * just quietly ignore any requests to change irq, etc.
1636 static int stli_setserial(struct stliport *portp, struct serial_struct __user *sp)
1638 struct serial_struct sio;
1641 if (copy_from_user(&sio, sp, sizeof(struct serial_struct)))
1643 if (!capable(CAP_SYS_ADMIN)) {
1644 if ((sio.baud_base != portp->baud_base) ||
1645 (sio.close_delay != portp->close_delay) ||
1646 ((sio.flags & ~ASYNC_USR_MASK) !=
1647 (portp->flags & ~ASYNC_USR_MASK)))
1651 portp->flags = (portp->flags & ~ASYNC_USR_MASK) |
1652 (sio.flags & ASYNC_USR_MASK);
1653 portp->baud_base = sio.baud_base;
1654 portp->close_delay = sio.close_delay;
1655 portp->closing_wait = sio.closing_wait;
1656 portp->custom_divisor = sio.custom_divisor;
1658 if ((rc = stli_setport(portp)) < 0)
1663 /*****************************************************************************/
1665 static int stli_tiocmget(struct tty_struct *tty, struct file *file)
1667 struct stliport *portp = tty->driver_data;
1668 struct stlibrd *brdp;
1673 if (portp->brdnr < 0 || portp->brdnr >= stli_nrbrds)
1675 brdp = stli_brds[portp->brdnr];
1678 if (tty->flags & (1 << TTY_IO_ERROR))
1681 if ((rc = stli_cmdwait(brdp, portp, A_GETSIGNALS,
1682 &portp->asig, sizeof(asysigs_t), 1)) < 0)
1685 return stli_mktiocm(portp->asig.sigvalue);
1688 static int stli_tiocmset(struct tty_struct *tty, struct file *file,
1689 unsigned int set, unsigned int clear)
1691 struct stliport *portp = tty->driver_data;
1692 struct stlibrd *brdp;
1693 int rts = -1, dtr = -1;
1697 if (portp->brdnr < 0 || portp->brdnr >= stli_nrbrds)
1699 brdp = stli_brds[portp->brdnr];
1702 if (tty->flags & (1 << TTY_IO_ERROR))
1705 if (set & TIOCM_RTS)
1707 if (set & TIOCM_DTR)
1709 if (clear & TIOCM_RTS)
1711 if (clear & TIOCM_DTR)
1714 stli_mkasysigs(&portp->asig, dtr, rts);
1716 return stli_cmdwait(brdp, portp, A_SETSIGNALS, &portp->asig,
1717 sizeof(asysigs_t), 0);
1720 static int stli_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1722 struct stliport *portp;
1723 struct stlibrd *brdp;
1726 void __user *argp = (void __user *)arg;
1728 portp = tty->driver_data;
1731 if (portp->brdnr < 0 || portp->brdnr >= stli_nrbrds)
1733 brdp = stli_brds[portp->brdnr];
1737 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
1738 (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS)) {
1739 if (tty->flags & (1 << TTY_IO_ERROR))
1747 rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0),
1748 (unsigned __user *) arg);
1751 if ((rc = get_user(ival, (unsigned __user *) arg)) == 0)
1752 tty->termios->c_cflag =
1753 (tty->termios->c_cflag & ~CLOCAL) |
1754 (ival ? CLOCAL : 0);
1757 rc = stli_getserial(portp, argp);
1760 rc = stli_setserial(portp, argp);
1763 rc = put_user(portp->pflag, (unsigned __user *)argp);
1766 if ((rc = get_user(portp->pflag, (unsigned __user *)argp)) == 0)
1767 stli_setport(portp);
1769 case COM_GETPORTSTATS:
1770 rc = stli_getportstats(portp, argp);
1772 case COM_CLRPORTSTATS:
1773 rc = stli_clrportstats(portp, argp);
1779 case TIOCSERGSTRUCT:
1780 case TIOCSERGETMULTI:
1781 case TIOCSERSETMULTI:
1790 /*****************************************************************************/
1793 * This routine assumes that we have user context and can sleep.
1794 * Looks like it is true for the current ttys implementation..!!
1797 static void stli_settermios(struct tty_struct *tty, struct ktermios *old)
1799 struct stliport *portp;
1800 struct stlibrd *brdp;
1801 struct ktermios *tiosp;
1806 portp = tty->driver_data;
1809 if (portp->brdnr < 0 || portp->brdnr >= stli_nrbrds)
1811 brdp = stli_brds[portp->brdnr];
1815 tiosp = tty->termios;
1816 if ((tiosp->c_cflag == old->c_cflag) &&
1817 (tiosp->c_iflag == old->c_iflag))
1820 stli_mkasyport(portp, &aport, tiosp);
1821 stli_cmdwait(brdp, portp, A_SETPORT, &aport, sizeof(asyport_t), 0);
1822 stli_mkasysigs(&portp->asig, ((tiosp->c_cflag & CBAUD) ? 1 : 0), -1);
1823 stli_cmdwait(brdp, portp, A_SETSIGNALS, &portp->asig,
1824 sizeof(asysigs_t), 0);
1825 if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0))
1826 tty->hw_stopped = 0;
1827 if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL))
1828 wake_up_interruptible(&portp->open_wait);
1831 /*****************************************************************************/
1834 * Attempt to flow control who ever is sending us data. We won't really
1835 * do any flow control action here. We can't directly, and even if we
1836 * wanted to we would have to send a command to the slave. The slave
1837 * knows how to flow control, and will do so when its buffers reach its
1838 * internal high water marks. So what we will do is set a local state
1839 * bit that will stop us sending any RX data up from the poll routine
1840 * (which is the place where RX data from the slave is handled).
1843 static void stli_throttle(struct tty_struct *tty)
1845 struct stliport *portp = tty->driver_data;
1848 set_bit(ST_RXSTOP, &portp->state);
1851 /*****************************************************************************/
1854 * Unflow control the device sending us data... That means that all
1855 * we have to do is clear the RXSTOP state bit. The next poll call
1856 * will then be able to pass the RX data back up.
1859 static void stli_unthrottle(struct tty_struct *tty)
1861 struct stliport *portp = tty->driver_data;
1864 clear_bit(ST_RXSTOP, &portp->state);
1867 /*****************************************************************************/
1870 * Stop the transmitter.
1873 static void stli_stop(struct tty_struct *tty)
1877 /*****************************************************************************/
1880 * Start the transmitter again.
1883 static void stli_start(struct tty_struct *tty)
1887 /*****************************************************************************/
1890 * Scheduler called hang up routine. This is called from the scheduler,
1891 * not direct from the driver "poll" routine. We can't call it there
1892 * since the real local hangup code will enable/disable the board and
1893 * other things that we can't do while handling the poll. Much easier
1894 * to deal with it some time later (don't really care when, hangups
1895 * aren't that time critical).
1898 static void stli_dohangup(struct work_struct *ugly_api)
1900 struct stliport *portp = container_of(ugly_api, struct stliport, tqhangup);
1901 if (portp->tty != NULL) {
1902 tty_hangup(portp->tty);
1906 /*****************************************************************************/
1909 * Hangup this port. This is pretty much like closing the port, only
1910 * a little more brutal. No waiting for data to drain. Shutdown the
1911 * port and maybe drop signals. This is rather tricky really. We want
1912 * to close the port as well.
1915 static void stli_hangup(struct tty_struct *tty)
1917 struct stliport *portp;
1918 struct stlibrd *brdp;
1919 unsigned long flags;
1921 portp = tty->driver_data;
1924 if (portp->brdnr < 0 || portp->brdnr >= stli_nrbrds)
1926 brdp = stli_brds[portp->brdnr];
1930 portp->flags &= ~ASYNC_INITIALIZED;
1932 if (!test_bit(ST_CLOSING, &portp->state))
1933 stli_rawclose(brdp, portp, 0, 0);
1935 spin_lock_irqsave(&stli_lock, flags);
1936 if (tty->termios->c_cflag & HUPCL) {
1937 stli_mkasysigs(&portp->asig, 0, 0);
1938 if (test_bit(ST_CMDING, &portp->state)) {
1939 set_bit(ST_DOSIGS, &portp->state);
1940 set_bit(ST_DOFLUSHTX, &portp->state);
1941 set_bit(ST_DOFLUSHRX, &portp->state);
1943 stli_sendcmd(brdp, portp, A_SETSIGNALSF,
1944 &portp->asig, sizeof(asysigs_t), 0);
1948 clear_bit(ST_TXBUSY, &portp->state);
1949 clear_bit(ST_RXSTOP, &portp->state);
1950 set_bit(TTY_IO_ERROR, &tty->flags);
1952 portp->flags &= ~ASYNC_NORMAL_ACTIVE;
1953 portp->refcount = 0;
1954 spin_unlock_irqrestore(&stli_lock, flags);
1956 wake_up_interruptible(&portp->open_wait);
1959 /*****************************************************************************/
1962 * Flush characters from the lower buffer. We may not have user context
1963 * so we cannot sleep waiting for it to complete. Also we need to check
1964 * if there is chars for this port in the TX cook buffer, and flush them
1968 static void stli_flushbuffer(struct tty_struct *tty)
1970 struct stliport *portp;
1971 struct stlibrd *brdp;
1972 unsigned long ftype, flags;
1974 portp = tty->driver_data;
1977 if (portp->brdnr < 0 || portp->brdnr >= stli_nrbrds)
1979 brdp = stli_brds[portp->brdnr];
1983 spin_lock_irqsave(&brd_lock, flags);
1984 if (tty == stli_txcooktty) {
1985 stli_txcooktty = NULL;
1986 stli_txcooksize = 0;
1987 stli_txcookrealsize = 0;
1989 if (test_bit(ST_CMDING, &portp->state)) {
1990 set_bit(ST_DOFLUSHTX, &portp->state);
1993 if (test_bit(ST_DOFLUSHRX, &portp->state)) {
1995 clear_bit(ST_DOFLUSHRX, &portp->state);
1997 __stli_sendcmd(brdp, portp, A_FLUSH, &ftype, sizeof(u32), 0);
1999 spin_unlock_irqrestore(&brd_lock, flags);
2003 /*****************************************************************************/
2005 static void stli_breakctl(struct tty_struct *tty, int state)
2007 struct stlibrd *brdp;
2008 struct stliport *portp;
2011 portp = tty->driver_data;
2014 if (portp->brdnr < 0 || portp->brdnr >= stli_nrbrds)
2016 brdp = stli_brds[portp->brdnr];
2020 arg = (state == -1) ? BREAKON : BREAKOFF;
2021 stli_cmdwait(brdp, portp, A_BREAK, &arg, sizeof(long), 0);
2024 /*****************************************************************************/
2026 static void stli_waituntilsent(struct tty_struct *tty, int timeout)
2028 struct stliport *portp;
2033 portp = tty->driver_data;
2039 tend = jiffies + timeout;
2041 while (test_bit(ST_TXBUSY, &portp->state)) {
2042 if (signal_pending(current))
2044 msleep_interruptible(20);
2045 if (time_after_eq(jiffies, tend))
2050 /*****************************************************************************/
2052 static void stli_sendxchar(struct tty_struct *tty, char ch)
2054 struct stlibrd *brdp;
2055 struct stliport *portp;
2058 portp = tty->driver_data;
2061 if (portp->brdnr < 0 || portp->brdnr >= stli_nrbrds)
2063 brdp = stli_brds[portp->brdnr];
2067 memset(&actrl, 0, sizeof(asyctrl_t));
2068 if (ch == STOP_CHAR(tty)) {
2069 actrl.rxctrl = CT_STOPFLOW;
2070 } else if (ch == START_CHAR(tty)) {
2071 actrl.rxctrl = CT_STARTFLOW;
2073 actrl.txctrl = CT_SENDCHR;
2076 stli_cmdwait(brdp, portp, A_PORTCTRL, &actrl, sizeof(asyctrl_t), 0);
2079 /*****************************************************************************/
2084 * Format info for a specified port. The line is deliberately limited
2085 * to 80 characters. (If it is too long it will be truncated, if too
2086 * short then padded with spaces).
2089 static int stli_portinfo(struct stlibrd *brdp, struct stliport *portp, int portnr, char *pos)
2094 rc = stli_portcmdstats(portp);
2097 if (brdp->state & BST_STARTED) {
2098 switch (stli_comstats.hwid) {
2099 case 0: uart = "2681"; break;
2100 case 1: uart = "SC26198"; break;
2101 default:uart = "CD1400"; break;
2106 sp += sprintf(sp, "%d: uart:%s ", portnr, uart);
2108 if ((brdp->state & BST_STARTED) && (rc >= 0)) {
2109 sp += sprintf(sp, "tx:%d rx:%d", (int) stli_comstats.txtotal,
2110 (int) stli_comstats.rxtotal);
2112 if (stli_comstats.rxframing)
2113 sp += sprintf(sp, " fe:%d",
2114 (int) stli_comstats.rxframing);
2115 if (stli_comstats.rxparity)
2116 sp += sprintf(sp, " pe:%d",
2117 (int) stli_comstats.rxparity);
2118 if (stli_comstats.rxbreaks)
2119 sp += sprintf(sp, " brk:%d",
2120 (int) stli_comstats.rxbreaks);
2121 if (stli_comstats.rxoverrun)
2122 sp += sprintf(sp, " oe:%d",
2123 (int) stli_comstats.rxoverrun);
2125 cnt = sprintf(sp, "%s%s%s%s%s ",
2126 (stli_comstats.signals & TIOCM_RTS) ? "|RTS" : "",
2127 (stli_comstats.signals & TIOCM_CTS) ? "|CTS" : "",
2128 (stli_comstats.signals & TIOCM_DTR) ? "|DTR" : "",
2129 (stli_comstats.signals & TIOCM_CD) ? "|DCD" : "",
2130 (stli_comstats.signals & TIOCM_DSR) ? "|DSR" : "");
2135 for (cnt = (sp - pos); (cnt < (MAXLINE - 1)); cnt++)
2138 pos[(MAXLINE - 2)] = '+';
2139 pos[(MAXLINE - 1)] = '\n';
2144 /*****************************************************************************/
2147 * Port info, read from the /proc file system.
2150 static int stli_readproc(char *page, char **start, off_t off, int count, int *eof, void *data)
2152 struct stlibrd *brdp;
2153 struct stliport *portp;
2154 int brdnr, portnr, totalport;
2163 pos += sprintf(pos, "%s: version %s", stli_drvtitle,
2165 while (pos < (page + MAXLINE - 1))
2172 * We scan through for each board, panel and port. The offset is
2173 * calculated on the fly, and irrelevant ports are skipped.
2175 for (brdnr = 0; (brdnr < stli_nrbrds); brdnr++) {
2176 brdp = stli_brds[brdnr];
2179 if (brdp->state == 0)
2182 maxoff = curoff + (brdp->nrports * MAXLINE);
2183 if (off >= maxoff) {
2188 totalport = brdnr * STL_MAXPORTS;
2189 for (portnr = 0; (portnr < brdp->nrports); portnr++,
2191 portp = brdp->ports[portnr];
2194 if (off >= (curoff += MAXLINE))
2196 if ((pos - page + MAXLINE) > count)
2198 pos += stli_portinfo(brdp, portp, totalport, pos);
2209 /*****************************************************************************/
2212 * Generic send command routine. This will send a message to the slave,
2213 * of the specified type with the specified argument. Must be very
2214 * careful of data that will be copied out from shared memory -
2215 * containing command results. The command completion is all done from
2216 * a poll routine that does not have user context. Therefore you cannot
2217 * copy back directly into user space, or to the kernel stack of a
2218 * process. This routine does not sleep, so can be called from anywhere.
2220 * The caller must hold the brd_lock (see also stli_sendcmd the usual
2224 static void __stli_sendcmd(struct stlibrd *brdp, struct stliport *portp, unsigned long cmd, void *arg, int size, int copyback)
2226 cdkhdr_t __iomem *hdrp;
2227 cdkctrl_t __iomem *cp;
2228 unsigned char __iomem *bits;
2229 unsigned long flags;
2231 spin_lock_irqsave(&brd_lock, flags);
2233 if (test_bit(ST_CMDING, &portp->state)) {
2234 printk(KERN_ERR "STALLION: command already busy, cmd=%x!\n",
2236 spin_unlock_irqrestore(&brd_lock, flags);
2241 cp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->ctrl;
2243 memcpy_toio((void __iomem *) &(cp->args[0]), arg, size);
2246 portp->argsize = size;
2249 writel(0, &cp->status);
2250 writel(cmd, &cp->cmd);
2251 hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
2252 bits = ((unsigned char __iomem *) hdrp) + brdp->slaveoffset +
2254 writeb(readb(bits) | portp->portbit, bits);
2255 set_bit(ST_CMDING, &portp->state);
2257 spin_unlock_irqrestore(&brd_lock, flags);
2260 static void stli_sendcmd(struct stlibrd *brdp, struct stliport *portp, unsigned long cmd, void *arg, int size, int copyback)
2262 unsigned long flags;
2264 spin_lock_irqsave(&brd_lock, flags);
2265 __stli_sendcmd(brdp, portp, cmd, arg, size, copyback);
2266 spin_unlock_irqrestore(&brd_lock, flags);
2269 /*****************************************************************************/
2272 * Read data from shared memory. This assumes that the shared memory
2273 * is enabled and that interrupts are off. Basically we just empty out
2274 * the shared memory buffer into the tty buffer. Must be careful to
2275 * handle the case where we fill up the tty buffer, but still have
2276 * more chars to unload.
2279 static void stli_read(struct stlibrd *brdp, struct stliport *portp)
2281 cdkasyrq_t __iomem *rp;
2282 char __iomem *shbuf;
2283 struct tty_struct *tty;
2284 unsigned int head, tail, size;
2285 unsigned int len, stlen;
2287 if (test_bit(ST_RXSTOP, &portp->state))
2293 rp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->rxq;
2294 head = (unsigned int) readw(&rp->head);
2295 if (head != ((unsigned int) readw(&rp->head)))
2296 head = (unsigned int) readw(&rp->head);
2297 tail = (unsigned int) readw(&rp->tail);
2298 size = portp->rxsize;
2303 len = size - (tail - head);
2304 stlen = size - tail;
2307 len = tty_buffer_request_room(tty, len);
2309 shbuf = (char __iomem *) EBRDGETMEMPTR(brdp, portp->rxoffset);
2312 unsigned char *cptr;
2314 stlen = min(len, stlen);
2315 tty_prepare_flip_string(tty, &cptr, stlen);
2316 memcpy_fromio(cptr, shbuf + tail, stlen);
2324 rp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->rxq;
2325 writew(tail, &rp->tail);
2328 set_bit(ST_RXING, &portp->state);
2330 tty_schedule_flip(tty);
2333 /*****************************************************************************/
2336 * Set up and carry out any delayed commands. There is only a small set
2337 * of slave commands that can be done "off-level". So it is not too
2338 * difficult to deal with them here.
2341 static void stli_dodelaycmd(struct stliport *portp, cdkctrl_t __iomem *cp)
2345 if (test_bit(ST_DOSIGS, &portp->state)) {
2346 if (test_bit(ST_DOFLUSHTX, &portp->state) &&
2347 test_bit(ST_DOFLUSHRX, &portp->state))
2348 cmd = A_SETSIGNALSF;
2349 else if (test_bit(ST_DOFLUSHTX, &portp->state))
2350 cmd = A_SETSIGNALSFTX;
2351 else if (test_bit(ST_DOFLUSHRX, &portp->state))
2352 cmd = A_SETSIGNALSFRX;
2355 clear_bit(ST_DOFLUSHTX, &portp->state);
2356 clear_bit(ST_DOFLUSHRX, &portp->state);
2357 clear_bit(ST_DOSIGS, &portp->state);
2358 memcpy_toio((void __iomem *) &(cp->args[0]), (void *) &portp->asig,
2360 writel(0, &cp->status);
2361 writel(cmd, &cp->cmd);
2362 set_bit(ST_CMDING, &portp->state);
2363 } else if (test_bit(ST_DOFLUSHTX, &portp->state) ||
2364 test_bit(ST_DOFLUSHRX, &portp->state)) {
2365 cmd = ((test_bit(ST_DOFLUSHTX, &portp->state)) ? FLUSHTX : 0);
2366 cmd |= ((test_bit(ST_DOFLUSHRX, &portp->state)) ? FLUSHRX : 0);
2367 clear_bit(ST_DOFLUSHTX, &portp->state);
2368 clear_bit(ST_DOFLUSHRX, &portp->state);
2369 memcpy_toio((void __iomem *) &(cp->args[0]), (void *) &cmd, sizeof(int));
2370 writel(0, &cp->status);
2371 writel(A_FLUSH, &cp->cmd);
2372 set_bit(ST_CMDING, &portp->state);
2376 /*****************************************************************************/
2379 * Host command service checking. This handles commands or messages
2380 * coming from the slave to the host. Must have board shared memory
2381 * enabled and interrupts off when called. Notice that by servicing the
2382 * read data last we don't need to change the shared memory pointer
2383 * during processing (which is a slow IO operation).
2384 * Return value indicates if this port is still awaiting actions from
2385 * the slave (like open, command, or even TX data being sent). If 0
2386 * then port is still busy, otherwise no longer busy.
2389 static int stli_hostcmd(struct stlibrd *brdp, struct stliport *portp)
2391 cdkasy_t __iomem *ap;
2392 cdkctrl_t __iomem *cp;
2393 struct tty_struct *tty;
2395 unsigned long oldsigs;
2398 ap = (cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr);
2402 * Check if we are waiting for an open completion message.
2404 if (test_bit(ST_OPENING, &portp->state)) {
2405 rc = readl(&cp->openarg);
2406 if (readb(&cp->open) == 0 && rc != 0) {
2409 writel(0, &cp->openarg);
2411 clear_bit(ST_OPENING, &portp->state);
2412 wake_up_interruptible(&portp->raw_wait);
2417 * Check if we are waiting for a close completion message.
2419 if (test_bit(ST_CLOSING, &portp->state)) {
2420 rc = (int) readl(&cp->closearg);
2421 if (readb(&cp->close) == 0 && rc != 0) {
2424 writel(0, &cp->closearg);
2426 clear_bit(ST_CLOSING, &portp->state);
2427 wake_up_interruptible(&portp->raw_wait);
2432 * Check if we are waiting for a command completion message. We may
2433 * need to copy out the command results associated with this command.
2435 if (test_bit(ST_CMDING, &portp->state)) {
2436 rc = readl(&cp->status);
2437 if (readl(&cp->cmd) == 0 && rc != 0) {
2440 if (portp->argp != NULL) {
2441 memcpy_fromio(portp->argp, (void __iomem *) &(cp->args[0]),
2445 writel(0, &cp->status);
2447 clear_bit(ST_CMDING, &portp->state);
2448 stli_dodelaycmd(portp, cp);
2449 wake_up_interruptible(&portp->raw_wait);
2454 * Check for any notification messages ready. This includes lots of
2455 * different types of events - RX chars ready, RX break received,
2456 * TX data low or empty in the slave, modem signals changed state.
2465 if (nt.signal & SG_DCD) {
2466 oldsigs = portp->sigs;
2467 portp->sigs = stli_mktiocm(nt.sigvalue);
2468 clear_bit(ST_GETSIGS, &portp->state);
2469 if ((portp->sigs & TIOCM_CD) &&
2470 ((oldsigs & TIOCM_CD) == 0))
2471 wake_up_interruptible(&portp->open_wait);
2472 if ((oldsigs & TIOCM_CD) &&
2473 ((portp->sigs & TIOCM_CD) == 0)) {
2474 if (portp->flags & ASYNC_CHECK_CD) {
2476 schedule_work(&portp->tqhangup);
2481 if (nt.data & DT_TXEMPTY)
2482 clear_bit(ST_TXBUSY, &portp->state);
2483 if (nt.data & (DT_TXEMPTY | DT_TXLOW)) {
2487 wake_up_interruptible(&tty->write_wait);
2491 if ((nt.data & DT_RXBREAK) && (portp->rxmarkmsk & BRKINT)) {
2493 tty_insert_flip_char(tty, 0, TTY_BREAK);
2494 if (portp->flags & ASYNC_SAK) {
2498 tty_schedule_flip(tty);
2502 if (nt.data & DT_RXBUSY) {
2504 stli_read(brdp, portp);
2509 * It might seem odd that we are checking for more RX chars here.
2510 * But, we need to handle the case where the tty buffer was previously
2511 * filled, but we had more characters to pass up. The slave will not
2512 * send any more RX notify messages until the RX buffer has been emptied.
2513 * But it will leave the service bits on (since the buffer is not empty).
2514 * So from here we can try to process more RX chars.
2516 if ((!donerx) && test_bit(ST_RXING, &portp->state)) {
2517 clear_bit(ST_RXING, &portp->state);
2518 stli_read(brdp, portp);
2521 return((test_bit(ST_OPENING, &portp->state) ||
2522 test_bit(ST_CLOSING, &portp->state) ||
2523 test_bit(ST_CMDING, &portp->state) ||
2524 test_bit(ST_TXBUSY, &portp->state) ||
2525 test_bit(ST_RXING, &portp->state)) ? 0 : 1);
2528 /*****************************************************************************/
2531 * Service all ports on a particular board. Assumes that the boards
2532 * shared memory is enabled, and that the page pointer is pointed
2533 * at the cdk header structure.
2536 static void stli_brdpoll(struct stlibrd *brdp, cdkhdr_t __iomem *hdrp)
2538 struct stliport *portp;
2539 unsigned char hostbits[(STL_MAXCHANS / 8) + 1];
2540 unsigned char slavebits[(STL_MAXCHANS / 8) + 1];
2541 unsigned char __iomem *slavep;
2542 int bitpos, bitat, bitsize;
2543 int channr, nrdevs, slavebitchange;
2545 bitsize = brdp->bitsize;
2546 nrdevs = brdp->nrdevs;
2549 * Check if slave wants any service. Basically we try to do as
2550 * little work as possible here. There are 2 levels of service
2551 * bits. So if there is nothing to do we bail early. We check
2552 * 8 service bits at a time in the inner loop, so we can bypass
2553 * the lot if none of them want service.
2555 memcpy_fromio(&hostbits[0], (((unsigned char __iomem *) hdrp) + brdp->hostoffset),
2558 memset(&slavebits[0], 0, bitsize);
2561 for (bitpos = 0; (bitpos < bitsize); bitpos++) {
2562 if (hostbits[bitpos] == 0)
2564 channr = bitpos * 8;
2565 for (bitat = 0x1; (channr < nrdevs); channr++, bitat <<= 1) {
2566 if (hostbits[bitpos] & bitat) {
2567 portp = brdp->ports[(channr - 1)];
2568 if (stli_hostcmd(brdp, portp)) {
2570 slavebits[bitpos] |= bitat;
2577 * If any of the ports are no longer busy then update them in the
2578 * slave request bits. We need to do this after, since a host port
2579 * service may initiate more slave requests.
2581 if (slavebitchange) {
2582 hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
2583 slavep = ((unsigned char __iomem *) hdrp) + brdp->slaveoffset;
2584 for (bitpos = 0; (bitpos < bitsize); bitpos++) {
2585 if (readb(slavebits + bitpos))
2586 writeb(readb(slavep + bitpos) & ~slavebits[bitpos], slavebits + bitpos);
2591 /*****************************************************************************/
2594 * Driver poll routine. This routine polls the boards in use and passes
2595 * messages back up to host when necessary. This is actually very
2596 * CPU efficient, since we will always have the kernel poll clock, it
2597 * adds only a few cycles when idle (since board service can be
2598 * determined very easily), but when loaded generates no interrupts
2599 * (with their expensive associated context change).
2602 static void stli_poll(unsigned long arg)
2604 cdkhdr_t __iomem *hdrp;
2605 struct stlibrd *brdp;
2608 stli_timerlist.expires = STLI_TIMEOUT;
2609 add_timer(&stli_timerlist);
2612 * Check each board and do any servicing required.
2614 for (brdnr = 0; (brdnr < stli_nrbrds); brdnr++) {
2615 brdp = stli_brds[brdnr];
2618 if ((brdp->state & BST_STARTED) == 0)
2621 spin_lock(&brd_lock);
2623 hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
2624 if (readb(&hdrp->hostreq))
2625 stli_brdpoll(brdp, hdrp);
2627 spin_unlock(&brd_lock);
2631 /*****************************************************************************/
2634 * Translate the termios settings into the port setting structure of
2638 static void stli_mkasyport(struct stliport *portp, asyport_t *pp, struct ktermios *tiosp)
2640 memset(pp, 0, sizeof(asyport_t));
2643 * Start of by setting the baud, char size, parity and stop bit info.
2645 pp->baudout = tty_get_baud_rate(portp->tty);
2646 if ((tiosp->c_cflag & CBAUD) == B38400) {
2647 if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2648 pp->baudout = 57600;
2649 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2650 pp->baudout = 115200;
2651 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
2652 pp->baudout = 230400;
2653 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
2654 pp->baudout = 460800;
2655 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
2656 pp->baudout = (portp->baud_base / portp->custom_divisor);
2658 if (pp->baudout > STL_MAXBAUD)
2659 pp->baudout = STL_MAXBAUD;
2660 pp->baudin = pp->baudout;
2662 switch (tiosp->c_cflag & CSIZE) {
2677 if (tiosp->c_cflag & CSTOPB)
2678 pp->stopbs = PT_STOP2;
2680 pp->stopbs = PT_STOP1;
2682 if (tiosp->c_cflag & PARENB) {
2683 if (tiosp->c_cflag & PARODD)
2684 pp->parity = PT_ODDPARITY;
2686 pp->parity = PT_EVENPARITY;
2688 pp->parity = PT_NOPARITY;
2692 * Set up any flow control options enabled.
2694 if (tiosp->c_iflag & IXON) {
2696 if (tiosp->c_iflag & IXANY)
2697 pp->flow |= F_IXANY;
2699 if (tiosp->c_cflag & CRTSCTS)
2700 pp->flow |= (F_RTSFLOW | F_CTSFLOW);
2702 pp->startin = tiosp->c_cc[VSTART];
2703 pp->stopin = tiosp->c_cc[VSTOP];
2704 pp->startout = tiosp->c_cc[VSTART];
2705 pp->stopout = tiosp->c_cc[VSTOP];
2708 * Set up the RX char marking mask with those RX error types we must
2709 * catch. We can get the slave to help us out a little here, it will
2710 * ignore parity errors and breaks for us, and mark parity errors in
2713 if (tiosp->c_iflag & IGNPAR)
2714 pp->iflag |= FI_IGNRXERRS;
2715 if (tiosp->c_iflag & IGNBRK)
2716 pp->iflag |= FI_IGNBREAK;
2718 portp->rxmarkmsk = 0;
2719 if (tiosp->c_iflag & (INPCK | PARMRK))
2720 pp->iflag |= FI_1MARKRXERRS;
2721 if (tiosp->c_iflag & BRKINT)
2722 portp->rxmarkmsk |= BRKINT;
2725 * Set up clocal processing as required.
2727 if (tiosp->c_cflag & CLOCAL)
2728 portp->flags &= ~ASYNC_CHECK_CD;
2730 portp->flags |= ASYNC_CHECK_CD;
2733 * Transfer any persistent flags into the asyport structure.
2735 pp->pflag = (portp->pflag & 0xffff);
2736 pp->vmin = (portp->pflag & P_RXIMIN) ? 1 : 0;
2737 pp->vtime = (portp->pflag & P_RXITIME) ? 1 : 0;
2738 pp->cc[1] = (portp->pflag & P_RXTHOLD) ? 1 : 0;
2741 /*****************************************************************************/
2744 * Construct a slave signals structure for setting the DTR and RTS
2745 * signals as specified.
2748 static void stli_mkasysigs(asysigs_t *sp, int dtr, int rts)
2750 memset(sp, 0, sizeof(asysigs_t));
2752 sp->signal |= SG_DTR;
2753 sp->sigvalue |= ((dtr > 0) ? SG_DTR : 0);
2756 sp->signal |= SG_RTS;
2757 sp->sigvalue |= ((rts > 0) ? SG_RTS : 0);
2761 /*****************************************************************************/
2764 * Convert the signals returned from the slave into a local TIOCM type
2765 * signals value. We keep them locally in TIOCM format.
2768 static long stli_mktiocm(unsigned long sigvalue)
2771 tiocm |= ((sigvalue & SG_DCD) ? TIOCM_CD : 0);
2772 tiocm |= ((sigvalue & SG_CTS) ? TIOCM_CTS : 0);
2773 tiocm |= ((sigvalue & SG_RI) ? TIOCM_RI : 0);
2774 tiocm |= ((sigvalue & SG_DSR) ? TIOCM_DSR : 0);
2775 tiocm |= ((sigvalue & SG_DTR) ? TIOCM_DTR : 0);
2776 tiocm |= ((sigvalue & SG_RTS) ? TIOCM_RTS : 0);
2780 /*****************************************************************************/
2783 * All panels and ports actually attached have been worked out. All
2784 * we need to do here is set up the appropriate per port data structures.
2787 static int stli_initports(struct stlibrd *brdp)
2789 struct stliport *portp;
2790 int i, panelnr, panelport;
2792 for (i = 0, panelnr = 0, panelport = 0; (i < brdp->nrports); i++) {
2793 portp = kzalloc(sizeof(struct stliport), GFP_KERNEL);
2795 printk("STALLION: failed to allocate port structure\n");
2799 portp->magic = STLI_PORTMAGIC;
2801 portp->brdnr = brdp->brdnr;
2802 portp->panelnr = panelnr;
2803 portp->baud_base = STL_BAUDBASE;
2804 portp->close_delay = STL_CLOSEDELAY;
2805 portp->closing_wait = 30 * HZ;
2806 INIT_WORK(&portp->tqhangup, stli_dohangup);
2807 init_waitqueue_head(&portp->open_wait);
2808 init_waitqueue_head(&portp->close_wait);
2809 init_waitqueue_head(&portp->raw_wait);
2811 if (panelport >= brdp->panels[panelnr]) {
2815 brdp->ports[i] = portp;
2821 /*****************************************************************************/
2824 * All the following routines are board specific hardware operations.
2827 static void stli_ecpinit(struct stlibrd *brdp)
2829 unsigned long memconf;
2831 outb(ECP_ATSTOP, (brdp->iobase + ECP_ATCONFR));
2833 outb(ECP_ATDISABLE, (brdp->iobase + ECP_ATCONFR));
2836 memconf = (brdp->memaddr & ECP_ATADDRMASK) >> ECP_ATADDRSHFT;
2837 outb(memconf, (brdp->iobase + ECP_ATMEMAR));
2840 /*****************************************************************************/
2842 static void stli_ecpenable(struct stlibrd *brdp)
2844 outb(ECP_ATENABLE, (brdp->iobase + ECP_ATCONFR));
2847 /*****************************************************************************/
2849 static void stli_ecpdisable(struct stlibrd *brdp)
2851 outb(ECP_ATDISABLE, (brdp->iobase + ECP_ATCONFR));
2854 /*****************************************************************************/
2856 static void __iomem *stli_ecpgetmemptr(struct stlibrd *brdp, unsigned long offset, int line)
2861 if (offset > brdp->memsize) {
2862 printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
2863 "range at line=%d(%d), brd=%d\n",
2864 (int) offset, line, __LINE__, brdp->brdnr);
2868 ptr = brdp->membase + (offset % ECP_ATPAGESIZE);
2869 val = (unsigned char) (offset / ECP_ATPAGESIZE);
2871 outb(val, (brdp->iobase + ECP_ATMEMPR));
2875 /*****************************************************************************/
2877 static void stli_ecpreset(struct stlibrd *brdp)
2879 outb(ECP_ATSTOP, (brdp->iobase + ECP_ATCONFR));
2881 outb(ECP_ATDISABLE, (brdp->iobase + ECP_ATCONFR));
2885 /*****************************************************************************/
2887 static void stli_ecpintr(struct stlibrd *brdp)
2889 outb(0x1, brdp->iobase);
2892 /*****************************************************************************/
2895 * The following set of functions act on ECP EISA boards.
2898 static void stli_ecpeiinit(struct stlibrd *brdp)
2900 unsigned long memconf;
2902 outb(0x1, (brdp->iobase + ECP_EIBRDENAB));
2903 outb(ECP_EISTOP, (brdp->iobase + ECP_EICONFR));
2905 outb(ECP_EIDISABLE, (brdp->iobase + ECP_EICONFR));
2908 memconf = (brdp->memaddr & ECP_EIADDRMASKL) >> ECP_EIADDRSHFTL;
2909 outb(memconf, (brdp->iobase + ECP_EIMEMARL));
2910 memconf = (brdp->memaddr & ECP_EIADDRMASKH) >> ECP_EIADDRSHFTH;
2911 outb(memconf, (brdp->iobase + ECP_EIMEMARH));
2914 /*****************************************************************************/
2916 static void stli_ecpeienable(struct stlibrd *brdp)
2918 outb(ECP_EIENABLE, (brdp->iobase + ECP_EICONFR));
2921 /*****************************************************************************/
2923 static void stli_ecpeidisable(struct stlibrd *brdp)
2925 outb(ECP_EIDISABLE, (brdp->iobase + ECP_EICONFR));
2928 /*****************************************************************************/
2930 static void __iomem *stli_ecpeigetmemptr(struct stlibrd *brdp, unsigned long offset, int line)
2935 if (offset > brdp->memsize) {
2936 printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
2937 "range at line=%d(%d), brd=%d\n",
2938 (int) offset, line, __LINE__, brdp->brdnr);
2942 ptr = brdp->membase + (offset % ECP_EIPAGESIZE);
2943 if (offset < ECP_EIPAGESIZE)
2946 val = ECP_EIENABLE | 0x40;
2948 outb(val, (brdp->iobase + ECP_EICONFR));
2952 /*****************************************************************************/
2954 static void stli_ecpeireset(struct stlibrd *brdp)
2956 outb(ECP_EISTOP, (brdp->iobase + ECP_EICONFR));
2958 outb(ECP_EIDISABLE, (brdp->iobase + ECP_EICONFR));
2962 /*****************************************************************************/
2965 * The following set of functions act on ECP MCA boards.
2968 static void stli_ecpmcenable(struct stlibrd *brdp)
2970 outb(ECP_MCENABLE, (brdp->iobase + ECP_MCCONFR));
2973 /*****************************************************************************/
2975 static void stli_ecpmcdisable(struct stlibrd *brdp)
2977 outb(ECP_MCDISABLE, (brdp->iobase + ECP_MCCONFR));
2980 /*****************************************************************************/
2982 static void __iomem *stli_ecpmcgetmemptr(struct stlibrd *brdp, unsigned long offset, int line)
2987 if (offset > brdp->memsize) {
2988 printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
2989 "range at line=%d(%d), brd=%d\n",
2990 (int) offset, line, __LINE__, brdp->brdnr);
2994 ptr = brdp->membase + (offset % ECP_MCPAGESIZE);
2995 val = ((unsigned char) (offset / ECP_MCPAGESIZE)) | ECP_MCENABLE;
2997 outb(val, (brdp->iobase + ECP_MCCONFR));
3001 /*****************************************************************************/
3003 static void stli_ecpmcreset(struct stlibrd *brdp)
3005 outb(ECP_MCSTOP, (brdp->iobase + ECP_MCCONFR));
3007 outb(ECP_MCDISABLE, (brdp->iobase + ECP_MCCONFR));
3011 /*****************************************************************************/
3014 * The following set of functions act on ECP PCI boards.
3017 static void stli_ecppciinit(struct stlibrd *brdp)
3019 outb(ECP_PCISTOP, (brdp->iobase + ECP_PCICONFR));
3021 outb(0, (brdp->iobase + ECP_PCICONFR));
3025 /*****************************************************************************/
3027 static void __iomem *stli_ecppcigetmemptr(struct stlibrd *brdp, unsigned long offset, int line)
3032 if (offset > brdp->memsize) {
3033 printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
3034 "range at line=%d(%d), board=%d\n",
3035 (int) offset, line, __LINE__, brdp->brdnr);
3039 ptr = brdp->membase + (offset % ECP_PCIPAGESIZE);
3040 val = (offset / ECP_PCIPAGESIZE) << 1;
3042 outb(val, (brdp->iobase + ECP_PCICONFR));
3046 /*****************************************************************************/
3048 static void stli_ecppcireset(struct stlibrd *brdp)
3050 outb(ECP_PCISTOP, (brdp->iobase + ECP_PCICONFR));
3052 outb(0, (brdp->iobase + ECP_PCICONFR));
3056 /*****************************************************************************/
3059 * The following routines act on ONboards.
3062 static void stli_onbinit(struct stlibrd *brdp)
3064 unsigned long memconf;
3066 outb(ONB_ATSTOP, (brdp->iobase + ONB_ATCONFR));
3068 outb(ONB_ATDISABLE, (brdp->iobase + ONB_ATCONFR));
3071 memconf = (brdp->memaddr & ONB_ATADDRMASK) >> ONB_ATADDRSHFT;
3072 outb(memconf, (brdp->iobase + ONB_ATMEMAR));
3073 outb(0x1, brdp->iobase);
3077 /*****************************************************************************/
3079 static void stli_onbenable(struct stlibrd *brdp)
3081 outb((brdp->enabval | ONB_ATENABLE), (brdp->iobase + ONB_ATCONFR));
3084 /*****************************************************************************/
3086 static void stli_onbdisable(struct stlibrd *brdp)
3088 outb((brdp->enabval | ONB_ATDISABLE), (brdp->iobase + ONB_ATCONFR));
3091 /*****************************************************************************/
3093 static void __iomem *stli_onbgetmemptr(struct stlibrd *brdp, unsigned long offset, int line)
3097 if (offset > brdp->memsize) {
3098 printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
3099 "range at line=%d(%d), brd=%d\n",
3100 (int) offset, line, __LINE__, brdp->brdnr);
3103 ptr = brdp->membase + (offset % ONB_ATPAGESIZE);
3108 /*****************************************************************************/
3110 static void stli_onbreset(struct stlibrd *brdp)
3112 outb(ONB_ATSTOP, (brdp->iobase + ONB_ATCONFR));
3114 outb(ONB_ATDISABLE, (brdp->iobase + ONB_ATCONFR));
3118 /*****************************************************************************/
3121 * The following routines act on ONboard EISA.
3124 static void stli_onbeinit(struct stlibrd *brdp)
3126 unsigned long memconf;
3128 outb(0x1, (brdp->iobase + ONB_EIBRDENAB));
3129 outb(ONB_EISTOP, (brdp->iobase + ONB_EICONFR));
3131 outb(ONB_EIDISABLE, (brdp->iobase + ONB_EICONFR));
3134 memconf = (brdp->memaddr & ONB_EIADDRMASKL) >> ONB_EIADDRSHFTL;
3135 outb(memconf, (brdp->iobase + ONB_EIMEMARL));
3136 memconf = (brdp->memaddr & ONB_EIADDRMASKH) >> ONB_EIADDRSHFTH;
3137 outb(memconf, (brdp->iobase + ONB_EIMEMARH));
3138 outb(0x1, brdp->iobase);
3142 /*****************************************************************************/
3144 static void stli_onbeenable(struct stlibrd *brdp)
3146 outb(ONB_EIENABLE, (brdp->iobase + ONB_EICONFR));
3149 /*****************************************************************************/
3151 static void stli_onbedisable(struct stlibrd *brdp)
3153 outb(ONB_EIDISABLE, (brdp->iobase + ONB_EICONFR));
3156 /*****************************************************************************/
3158 static void __iomem *stli_onbegetmemptr(struct stlibrd *brdp, unsigned long offset, int line)
3163 if (offset > brdp->memsize) {
3164 printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
3165 "range at line=%d(%d), brd=%d\n",
3166 (int) offset, line, __LINE__, brdp->brdnr);
3170 ptr = brdp->membase + (offset % ONB_EIPAGESIZE);
3171 if (offset < ONB_EIPAGESIZE)
3174 val = ONB_EIENABLE | 0x40;
3176 outb(val, (brdp->iobase + ONB_EICONFR));
3180 /*****************************************************************************/
3182 static void stli_onbereset(struct stlibrd *brdp)
3184 outb(ONB_EISTOP, (brdp->iobase + ONB_EICONFR));
3186 outb(ONB_EIDISABLE, (brdp->iobase + ONB_EICONFR));
3190 /*****************************************************************************/
3193 * The following routines act on Brumby boards.
3196 static void stli_bbyinit(struct stlibrd *brdp)
3198 outb(BBY_ATSTOP, (brdp->iobase + BBY_ATCONFR));
3200 outb(0, (brdp->iobase + BBY_ATCONFR));
3202 outb(0x1, brdp->iobase);
3206 /*****************************************************************************/
3208 static void __iomem *stli_bbygetmemptr(struct stlibrd *brdp, unsigned long offset, int line)
3213 BUG_ON(offset > brdp->memsize);
3215 ptr = brdp->membase + (offset % BBY_PAGESIZE);
3216 val = (unsigned char) (offset / BBY_PAGESIZE);
3217 outb(val, (brdp->iobase + BBY_ATCONFR));
3221 /*****************************************************************************/
3223 static void stli_bbyreset(struct stlibrd *brdp)
3225 outb(BBY_ATSTOP, (brdp->iobase + BBY_ATCONFR));
3227 outb(0, (brdp->iobase + BBY_ATCONFR));
3231 /*****************************************************************************/
3234 * The following routines act on original old Stallion boards.
3237 static void stli_stalinit(struct stlibrd *brdp)
3239 outb(0x1, brdp->iobase);
3243 /*****************************************************************************/
3245 static void __iomem *stli_stalgetmemptr(struct stlibrd *brdp, unsigned long offset, int line)
3247 BUG_ON(offset > brdp->memsize);
3248 return brdp->membase + (offset % STAL_PAGESIZE);
3251 /*****************************************************************************/
3253 static void stli_stalreset(struct stlibrd *brdp)
3257 vecp = (u32 __iomem *) (brdp->membase + 0x30);
3258 writel(0xffff0000, vecp);
3259 outb(0, brdp->iobase);
3263 /*****************************************************************************/
3266 * Try to find an ECP board and initialize it. This handles only ECP
3270 static int stli_initecp(struct stlibrd *brdp)
3273 cdkecpsig_t __iomem *sigsp;
3274 unsigned int status, nxtid;
3276 int panelnr, nrports;
3278 if (!request_region(brdp->iobase, brdp->iosize, "istallion"))
3281 if ((brdp->iobase == 0) || (brdp->memaddr == 0))
3283 release_region(brdp->iobase, brdp->iosize);
3287 brdp->iosize = ECP_IOSIZE;
3290 * Based on the specific board type setup the common vars to access
3291 * and enable shared memory. Set all board specific information now
3294 switch (brdp->brdtype) {
3296 brdp->memsize = ECP_MEMSIZE;
3297 brdp->pagesize = ECP_ATPAGESIZE;
3298 brdp->init = stli_ecpinit;
3299 brdp->enable = stli_ecpenable;
3300 brdp->reenable = stli_ecpenable;
3301 brdp->disable = stli_ecpdisable;
3302 brdp->getmemptr = stli_ecpgetmemptr;
3303 brdp->intr = stli_ecpintr;
3304 brdp->reset = stli_ecpreset;
3305 name = "serial(EC8/64)";
3309 brdp->memsize = ECP_MEMSIZE;
3310 brdp->pagesize = ECP_EIPAGESIZE;
3311 brdp->init = stli_ecpeiinit;
3312 brdp->enable = stli_ecpeienable;
3313 brdp->reenable = stli_ecpeienable;
3314 brdp->disable = stli_ecpeidisable;
3315 brdp->getmemptr = stli_ecpeigetmemptr;
3316 brdp->intr = stli_ecpintr;
3317 brdp->reset = stli_ecpeireset;
3318 name = "serial(EC8/64-EI)";
3322 brdp->memsize = ECP_MEMSIZE;
3323 brdp->pagesize = ECP_MCPAGESIZE;
3325 brdp->enable = stli_ecpmcenable;
3326 brdp->reenable = stli_ecpmcenable;
3327 brdp->disable = stli_ecpmcdisable;
3328 brdp->getmemptr = stli_ecpmcgetmemptr;
3329 brdp->intr = stli_ecpintr;
3330 brdp->reset = stli_ecpmcreset;
3331 name = "serial(EC8/64-MCA)";
3335 brdp->memsize = ECP_PCIMEMSIZE;
3336 brdp->pagesize = ECP_PCIPAGESIZE;
3337 brdp->init = stli_ecppciinit;
3338 brdp->enable = NULL;
3339 brdp->reenable = NULL;
3340 brdp->disable = NULL;
3341 brdp->getmemptr = stli_ecppcigetmemptr;
3342 brdp->intr = stli_ecpintr;
3343 brdp->reset = stli_ecppcireset;
3344 name = "serial(EC/RA-PCI)";
3348 release_region(brdp->iobase, brdp->iosize);
3353 * The per-board operations structure is all set up, so now let's go
3354 * and get the board operational. Firstly initialize board configuration
3355 * registers. Set the memory mapping info so we can get at the boards
3360 brdp->membase = ioremap(brdp->memaddr, brdp->memsize);
3361 if (brdp->membase == NULL)
3363 release_region(brdp->iobase, brdp->iosize);
3368 * Now that all specific code is set up, enable the shared memory and
3369 * look for the a signature area that will tell us exactly what board
3370 * this is, and what it is connected to it.
3373 sigsp = (cdkecpsig_t __iomem *) EBRDGETMEMPTR(brdp, CDK_SIGADDR);
3374 memcpy_fromio(&sig, sigsp, sizeof(cdkecpsig_t));
3377 if (sig.magic != cpu_to_le32(ECP_MAGIC))
3379 release_region(brdp->iobase, brdp->iosize);
3380 iounmap(brdp->membase);
3381 brdp->membase = NULL;
3386 * Scan through the signature looking at the panels connected to the
3387 * board. Calculate the total number of ports as we go.
3389 for (panelnr = 0, nxtid = 0; (panelnr < STL_MAXPANELS); panelnr++) {
3390 status = sig.panelid[nxtid];
3391 if ((status & ECH_PNLIDMASK) != nxtid)
3394 brdp->panelids[panelnr] = status;
3395 nrports = (status & ECH_PNL16PORT) ? 16 : 8;
3396 if ((nrports == 16) && ((status & ECH_PNLXPID) == 0))
3398 brdp->panels[panelnr] = nrports;
3399 brdp->nrports += nrports;
3405 brdp->state |= BST_FOUND;
3409 /*****************************************************************************/
3412 * Try to find an ONboard, Brumby or Stallion board and initialize it.
3413 * This handles only these board types.
3416 static int stli_initonb(struct stlibrd *brdp)
3419 cdkonbsig_t __iomem *sigsp;
3424 * Do a basic sanity check on the IO and memory addresses.
3426 if (brdp->iobase == 0 || brdp->memaddr == 0)
3429 brdp->iosize = ONB_IOSIZE;
3431 if (!request_region(brdp->iobase, brdp->iosize, "istallion"))
3435 * Based on the specific board type setup the common vars to access
3436 * and enable shared memory. Set all board specific information now
3439 switch (brdp->brdtype) {
3442 brdp->memsize = ONB_MEMSIZE;
3443 brdp->pagesize = ONB_ATPAGESIZE;
3444 brdp->init = stli_onbinit;
3445 brdp->enable = stli_onbenable;
3446 brdp->reenable = stli_onbenable;
3447 brdp->disable = stli_onbdisable;
3448 brdp->getmemptr = stli_onbgetmemptr;
3449 brdp->intr = stli_ecpintr;
3450 brdp->reset = stli_onbreset;
3451 if (brdp->memaddr > 0x100000)
3452 brdp->enabval = ONB_MEMENABHI;
3454 brdp->enabval = ONB_MEMENABLO;
3455 name = "serial(ONBoard)";
3459 brdp->memsize = ONB_EIMEMSIZE;
3460 brdp->pagesize = ONB_EIPAGESIZE;
3461 brdp->init = stli_onbeinit;
3462 brdp->enable = stli_onbeenable;
3463 brdp->reenable = stli_onbeenable;
3464 brdp->disable = stli_onbedisable;
3465 brdp->getmemptr = stli_onbegetmemptr;
3466 brdp->intr = stli_ecpintr;
3467 brdp->reset = stli_onbereset;
3468 name = "serial(ONBoard/E)";
3472 brdp->memsize = BBY_MEMSIZE;
3473 brdp->pagesize = BBY_PAGESIZE;
3474 brdp->init = stli_bbyinit;
3475 brdp->enable = NULL;
3476 brdp->reenable = NULL;
3477 brdp->disable = NULL;
3478 brdp->getmemptr = stli_bbygetmemptr;
3479 brdp->intr = stli_ecpintr;
3480 brdp->reset = stli_bbyreset;
3481 name = "serial(Brumby)";
3485 brdp->memsize = STAL_MEMSIZE;
3486 brdp->pagesize = STAL_PAGESIZE;
3487 brdp->init = stli_stalinit;
3488 brdp->enable = NULL;
3489 brdp->reenable = NULL;
3490 brdp->disable = NULL;
3491 brdp->getmemptr = stli_stalgetmemptr;
3492 brdp->intr = stli_ecpintr;
3493 brdp->reset = stli_stalreset;
3494 name = "serial(Stallion)";
3498 release_region(brdp->iobase, brdp->iosize);
3503 * The per-board operations structure is all set up, so now let's go
3504 * and get the board operational. Firstly initialize board configuration
3505 * registers. Set the memory mapping info so we can get at the boards
3510 brdp->membase = ioremap(brdp->memaddr, brdp->memsize);
3511 if (brdp->membase == NULL)
3513 release_region(brdp->iobase, brdp->iosize);
3518 * Now that all specific code is set up, enable the shared memory and
3519 * look for the a signature area that will tell us exactly what board
3520 * this is, and how many ports.
3523 sigsp = (cdkonbsig_t __iomem *) EBRDGETMEMPTR(brdp, CDK_SIGADDR);
3524 memcpy_fromio(&sig, sigsp, sizeof(cdkonbsig_t));
3527 if (sig.magic0 != cpu_to_le16(ONB_MAGIC0) ||
3528 sig.magic1 != cpu_to_le16(ONB_MAGIC1) ||
3529 sig.magic2 != cpu_to_le16(ONB_MAGIC2) ||
3530 sig.magic3 != cpu_to_le16(ONB_MAGIC3))
3532 release_region(brdp->iobase, brdp->iosize);
3533 iounmap(brdp->membase);
3534 brdp->membase = NULL;
3539 * Scan through the signature alive mask and calculate how many ports
3540 * there are on this board.
3546 for (i = 0; (i < 16); i++) {
3547 if (((sig.amask0 << i) & 0x8000) == 0)
3552 brdp->panels[0] = brdp->nrports;
3555 brdp->state |= BST_FOUND;
3559 /*****************************************************************************/
3562 * Start up a running board. This routine is only called after the
3563 * code has been down loaded to the board and is operational. It will
3564 * read in the memory map, and get the show on the road...
3567 static int stli_startbrd(struct stlibrd *brdp)
3569 cdkhdr_t __iomem *hdrp;
3570 cdkmem_t __iomem *memp;
3571 cdkasy_t __iomem *ap;
3572 unsigned long flags;
3573 struct stliport *portp;
3574 int portnr, nrdevs, i, rc = 0;
3577 spin_lock_irqsave(&brd_lock, flags);
3579 hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
3580 nrdevs = hdrp->nrdevs;
3583 printk("%s(%d): CDK version %d.%d.%d --> "
3584 "nrdevs=%d memp=%x hostp=%x slavep=%x\n",
3585 __FILE__, __LINE__, readb(&hdrp->ver_release), readb(&hdrp->ver_modification),
3586 readb(&hdrp->ver_fix), nrdevs, (int) readl(&hdrp->memp), readl(&hdrp->hostp),
3587 readl(&hdrp->slavep));
3590 if (nrdevs < (brdp->nrports + 1)) {
3591 printk(KERN_ERR "STALLION: slave failed to allocate memory for "
3592 "all devices, devices=%d\n", nrdevs);
3593 brdp->nrports = nrdevs - 1;
3595 brdp->nrdevs = nrdevs;
3596 brdp->hostoffset = hdrp->hostp - CDK_CDKADDR;
3597 brdp->slaveoffset = hdrp->slavep - CDK_CDKADDR;
3598 brdp->bitsize = (nrdevs + 7) / 8;
3599 memoff = readl(&hdrp->memp);
3600 if (memoff > brdp->memsize) {
3601 printk(KERN_ERR "STALLION: corrupted shared memory region?\n");
3603 goto stli_donestartup;
3605 memp = (cdkmem_t __iomem *) EBRDGETMEMPTR(brdp, memoff);
3606 if (readw(&memp->dtype) != TYP_ASYNCTRL) {
3607 printk(KERN_ERR "STALLION: no slave control device found\n");
3608 goto stli_donestartup;
3613 * Cycle through memory allocation of each port. We are guaranteed to
3614 * have all ports inside the first page of slave window, so no need to
3615 * change pages while reading memory map.
3617 for (i = 1, portnr = 0; (i < nrdevs); i++, portnr++, memp++) {
3618 if (readw(&memp->dtype) != TYP_ASYNC)
3620 portp = brdp->ports[portnr];
3624 portp->addr = readl(&memp->offset);
3625 portp->reqbit = (unsigned char) (0x1 << (i * 8 / nrdevs));
3626 portp->portidx = (unsigned char) (i / 8);
3627 portp->portbit = (unsigned char) (0x1 << (i % 8));
3630 writeb(0xff, &hdrp->slavereq);
3633 * For each port setup a local copy of the RX and TX buffer offsets
3634 * and sizes. We do this separate from the above, because we need to
3635 * move the shared memory page...
3637 for (i = 1, portnr = 0; (i < nrdevs); i++, portnr++) {
3638 portp = brdp->ports[portnr];
3641 if (portp->addr == 0)
3643 ap = (cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr);
3645 portp->rxsize = readw(&ap->rxq.size);
3646 portp->txsize = readw(&ap->txq.size);
3647 portp->rxoffset = readl(&ap->rxq.offset);
3648 portp->txoffset = readl(&ap->txq.offset);
3654 spin_unlock_irqrestore(&brd_lock, flags);
3657 brdp->state |= BST_STARTED;
3659 if (! stli_timeron) {
3661 stli_timerlist.expires = STLI_TIMEOUT;
3662 add_timer(&stli_timerlist);
3668 /*****************************************************************************/
3671 * Probe and initialize the specified board.
3674 static int __devinit stli_brdinit(struct stlibrd *brdp)
3676 stli_brds[brdp->brdnr] = brdp;
3678 switch (brdp->brdtype) {
3693 printk(KERN_ERR "STALLION: board=%d is unknown board "
3694 "type=%d\n", brdp->brdnr, brdp->brdtype);
3698 if ((brdp->state & BST_FOUND) == 0) {
3699 printk(KERN_ERR "STALLION: %s board not found, board=%d "
3701 stli_brdnames[brdp->brdtype], brdp->brdnr,
3702 brdp->iobase, (int) brdp->memaddr);
3706 stli_initports(brdp);
3707 printk(KERN_INFO "STALLION: %s found, board=%d io=%x mem=%x "
3708 "nrpanels=%d nrports=%d\n", stli_brdnames[brdp->brdtype],
3709 brdp->brdnr, brdp->iobase, (int) brdp->memaddr,
3710 brdp->nrpanels, brdp->nrports);
3714 /*****************************************************************************/
3717 * Probe around trying to find where the EISA boards shared memory
3718 * might be. This is a bit if hack, but it is the best we can do.
3721 static int stli_eisamemprobe(struct stlibrd *brdp)
3723 cdkecpsig_t ecpsig, __iomem *ecpsigp;
3724 cdkonbsig_t onbsig, __iomem *onbsigp;
3728 * First up we reset the board, to get it into a known state. There
3729 * is only 2 board types here we need to worry about. Don;t use the
3730 * standard board init routine here, it programs up the shared
3731 * memory address, and we don't know it yet...
3733 if (brdp->brdtype == BRD_ECPE) {
3734 outb(0x1, (brdp->iobase + ECP_EIBRDENAB));
3735 outb(ECP_EISTOP, (brdp->iobase + ECP_EICONFR));
3737 outb(ECP_EIDISABLE, (brdp->iobase + ECP_EICONFR));
3739 stli_ecpeienable(brdp);
3740 } else if (brdp->brdtype == BRD_ONBOARDE) {
3741 outb(0x1, (brdp->iobase + ONB_EIBRDENAB));
3742 outb(ONB_EISTOP, (brdp->iobase + ONB_EICONFR));
3744 outb(ONB_EIDISABLE, (brdp->iobase + ONB_EICONFR));
3746 outb(0x1, brdp->iobase);
3748 stli_onbeenable(brdp);
3754 brdp->memsize = ECP_MEMSIZE;
3757 * Board shared memory is enabled, so now we have a poke around and
3758 * see if we can find it.
3760 for (i = 0; (i < stli_eisamempsize); i++) {
3761 brdp->memaddr = stli_eisamemprobeaddrs[i];
3762 brdp->membase = ioremap(brdp->memaddr, brdp->memsize);
3763 if (brdp->membase == NULL)
3766 if (brdp->brdtype == BRD_ECPE) {
3767 ecpsigp = stli_ecpeigetmemptr(brdp,
3768 CDK_SIGADDR, __LINE__);
3769 memcpy_fromio(&ecpsig, ecpsigp, sizeof(cdkecpsig_t));
3770 if (ecpsig.magic == cpu_to_le32(ECP_MAGIC))
3773 onbsigp = (cdkonbsig_t __iomem *) stli_onbegetmemptr(brdp,
3774 CDK_SIGADDR, __LINE__);
3775 memcpy_fromio(&onbsig, onbsigp, sizeof(cdkonbsig_t));
3776 if ((onbsig.magic0 == cpu_to_le16(ONB_MAGIC0)) &&
3777 (onbsig.magic1 == cpu_to_le16(ONB_MAGIC1)) &&
3778 (onbsig.magic2 == cpu_to_le16(ONB_MAGIC2)) &&
3779 (onbsig.magic3 == cpu_to_le16(ONB_MAGIC3)))
3783 iounmap(brdp->membase);
3789 * Regardless of whether we found the shared memory or not we must
3790 * disable the region. After that return success or failure.
3792 if (brdp->brdtype == BRD_ECPE)
3793 stli_ecpeidisable(brdp);
3795 stli_onbedisable(brdp);
3799 brdp->membase = NULL;
3800 printk(KERN_ERR "STALLION: failed to probe shared memory "
3801 "region for %s in EISA slot=%d\n",
3802 stli_brdnames[brdp->brdtype], (brdp->iobase >> 12));
3808 static int stli_getbrdnr(void)
3812 for (i = 0; i < STL_MAXBRDS; i++) {
3813 if (!stli_brds[i]) {
3814 if (i >= stli_nrbrds)
3815 stli_nrbrds = i + 1;
3822 /*****************************************************************************/
3825 * Probe around and try to find any EISA boards in system. The biggest
3826 * problem here is finding out what memory address is associated with
3827 * an EISA board after it is found. The registers of the ECPE and
3828 * ONboardE are not readable - so we can't read them from there. We
3829 * don't have access to the EISA CMOS (or EISA BIOS) so we don't
3830 * actually have any way to find out the real value. The best we can
3831 * do is go probing around in the usual places hoping we can find it.
3834 static int stli_findeisabrds(void)
3836 struct stlibrd *brdp;
3837 unsigned int iobase, eid;
3841 * Firstly check if this is an EISA system. If this is not an EISA system then
3842 * don't bother going any further!
3848 * Looks like an EISA system, so go searching for EISA boards.
3850 for (iobase = 0x1000; (iobase <= 0xc000); iobase += 0x1000) {
3851 outb(0xff, (iobase + 0xc80));
3852 eid = inb(iobase + 0xc80);
3853 eid |= inb(iobase + 0xc81) << 8;
3854 if (eid != STL_EISAID)
3858 * We have found a board. Need to check if this board was
3859 * statically configured already (just in case!).
3861 for (i = 0; (i < STL_MAXBRDS); i++) {
3862 brdp = stli_brds[i];
3865 if (brdp->iobase == iobase)
3868 if (i < STL_MAXBRDS)
3872 * We have found a Stallion board and it is not configured already.
3873 * Allocate a board structure and initialize it.
3875 if ((brdp = stli_allocbrd()) == NULL)
3877 if ((brdp->brdnr = stli_getbrdnr()) < 0)
3879 eid = inb(iobase + 0xc82);
3880 if (eid == ECP_EISAID)
3881 brdp->brdtype = BRD_ECPE;
3882 else if (eid == ONB_EISAID)
3883 brdp->brdtype = BRD_ONBOARDE;
3885 brdp->brdtype = BRD_UNKNOWN;
3886 brdp->iobase = iobase;
3887 outb(0x1, (iobase + 0xc84));
3888 if (stli_eisamemprobe(brdp))
3889 outb(0, (iobase + 0xc84));
3896 /*****************************************************************************/
3899 * Find the next available board number that is free.
3902 /*****************************************************************************/
3905 * We have a Stallion board. Allocate a board structure and
3906 * initialize it. Read its IO and MEMORY resources from PCI
3907 * configuration space.
3910 static int __devinit stli_pciprobe(struct pci_dev *pdev,
3911 const struct pci_device_id *ent)
3913 struct stlibrd *brdp;
3916 retval = pci_enable_device(pdev);
3919 brdp = stli_allocbrd();
3924 if ((brdp->brdnr = stli_getbrdnr()) < 0) { /* TODO: locking */
3925 printk(KERN_INFO "STALLION: too many boards found, "
3926 "maximum supported %d\n", STL_MAXBRDS);
3930 brdp->brdtype = BRD_ECPPCI;
3932 * We have all resources from the board, so lets setup the actual
3933 * board structure now.
3935 brdp->iobase = pci_resource_start(pdev, 3);
3936 brdp->memaddr = pci_resource_start(pdev, 2);
3937 retval = stli_brdinit(brdp);
3941 pci_set_drvdata(pdev, brdp);
3950 static void stli_pciremove(struct pci_dev *pdev)
3952 struct stlibrd *brdp = pci_get_drvdata(pdev);
3954 stli_cleanup_ports(brdp);
3956 iounmap(brdp->membase);
3957 if (brdp->iosize > 0)
3958 release_region(brdp->iobase, brdp->iosize);
3960 stli_brds[brdp->brdnr] = NULL;
3964 static struct pci_driver stli_pcidriver = {
3965 .name = "istallion",
3966 .id_table = istallion_pci_tbl,
3967 .probe = stli_pciprobe,
3968 .remove = __devexit_p(stli_pciremove)
3970 /*****************************************************************************/
3973 * Allocate a new board structure. Fill out the basic info in it.
3976 static struct stlibrd *stli_allocbrd(void)
3978 struct stlibrd *brdp;
3980 brdp = kzalloc(sizeof(struct stlibrd), GFP_KERNEL);
3982 printk(KERN_ERR "STALLION: failed to allocate memory "
3983 "(size=%Zd)\n", sizeof(struct stlibrd));
3986 brdp->magic = STLI_BOARDMAGIC;
3990 /*****************************************************************************/
3993 * Scan through all the boards in the configuration and see what we
3997 static int stli_initbrds(void)
3999 struct stlibrd *brdp, *nxtbrdp;
4000 struct stlconf conf;
4003 for (stli_nrbrds = 0; stli_nrbrds < ARRAY_SIZE(stli_brdsp);
4005 memset(&conf, 0, sizeof(conf));
4006 if (stli_parsebrd(&conf, stli_brdsp[stli_nrbrds]) == 0)
4008 if ((brdp = stli_allocbrd()) == NULL)
4010 brdp->brdnr = stli_nrbrds;
4011 brdp->brdtype = conf.brdtype;
4012 brdp->iobase = conf.ioaddr1;
4013 brdp->memaddr = conf.memaddr;
4018 stli_findeisabrds();
4020 retval = pci_register_driver(&stli_pcidriver);
4021 /* TODO: check retval and do something */
4024 * All found boards are initialized. Now for a little optimization, if
4025 * no boards are sharing the "shared memory" regions then we can just
4026 * leave them all enabled. This is in fact the usual case.
4029 if (stli_nrbrds > 1) {
4030 for (i = 0; (i < stli_nrbrds); i++) {
4031 brdp = stli_brds[i];
4034 for (j = i + 1; (j < stli_nrbrds); j++) {
4035 nxtbrdp = stli_brds[j];
4036 if (nxtbrdp == NULL)
4038 if ((brdp->membase >= nxtbrdp->membase) &&
4039 (brdp->membase <= (nxtbrdp->membase +
4040 nxtbrdp->memsize - 1))) {
4048 if (stli_shared == 0) {
4049 for (i = 0; (i < stli_nrbrds); i++) {
4050 brdp = stli_brds[i];
4053 if (brdp->state & BST_FOUND) {
4055 brdp->enable = NULL;
4056 brdp->disable = NULL;
4064 /*****************************************************************************/
4067 * Code to handle an "staliomem" read operation. This device is the
4068 * contents of the board shared memory. It is used for down loading
4069 * the slave image (and debugging :-)
4072 static ssize_t stli_memread(struct file *fp, char __user *buf, size_t count, loff_t *offp)
4074 unsigned long flags;
4075 void __iomem *memptr;
4076 struct stlibrd *brdp;
4081 brdnr = iminor(fp->f_path.dentry->d_inode);
4082 if (brdnr >= stli_nrbrds)
4084 brdp = stli_brds[brdnr];
4087 if (brdp->state == 0)
4089 if (off >= brdp->memsize || off + count < off)
4092 size = min(count, (size_t)(brdp->memsize - off));
4095 * Copy the data a page at a time
4098 p = (void *)__get_free_page(GFP_KERNEL);
4103 spin_lock_irqsave(&brd_lock, flags);
4105 memptr = EBRDGETMEMPTR(brdp, off);
4106 n = min(size, (int)(brdp->pagesize - (((unsigned long) off) % brdp->pagesize)));
4107 n = min(n, (int)PAGE_SIZE);
4108 memcpy_fromio(p, memptr, n);
4110 spin_unlock_irqrestore(&brd_lock, flags);
4111 if (copy_to_user(buf, p, n)) {
4121 free_page((unsigned long)p);
4125 /*****************************************************************************/
4128 * Code to handle an "staliomem" write operation. This device is the
4129 * contents of the board shared memory. It is used for down loading
4130 * the slave image (and debugging :-)
4132 * FIXME: copy under lock
4135 static ssize_t stli_memwrite(struct file *fp, const char __user *buf, size_t count, loff_t *offp)
4137 unsigned long flags;
4138 void __iomem *memptr;
4139 struct stlibrd *brdp;
4145 brdnr = iminor(fp->f_path.dentry->d_inode);
4147 if (brdnr >= stli_nrbrds)
4149 brdp = stli_brds[brdnr];
4152 if (brdp->state == 0)
4154 if (off >= brdp->memsize || off + count < off)
4157 chbuf = (char __user *) buf;
4158 size = min(count, (size_t)(brdp->memsize - off));
4161 * Copy the data a page at a time
4164 p = (void *)__get_free_page(GFP_KERNEL);
4169 n = min(size, (int)(brdp->pagesize - (((unsigned long) off) % brdp->pagesize)));
4170 n = min(n, (int)PAGE_SIZE);
4171 if (copy_from_user(p, chbuf, n)) {
4176 spin_lock_irqsave(&brd_lock, flags);
4178 memptr = EBRDGETMEMPTR(brdp, off);
4179 memcpy_toio(memptr, p, n);
4181 spin_unlock_irqrestore(&brd_lock, flags);
4187 free_page((unsigned long) p);
4192 /*****************************************************************************/
4195 * Return the board stats structure to user app.
4198 static int stli_getbrdstats(combrd_t __user *bp)
4200 struct stlibrd *brdp;
4203 if (copy_from_user(&stli_brdstats, bp, sizeof(combrd_t)))
4205 if (stli_brdstats.brd >= STL_MAXBRDS)
4207 brdp = stli_brds[stli_brdstats.brd];
4211 memset(&stli_brdstats, 0, sizeof(combrd_t));
4212 stli_brdstats.brd = brdp->brdnr;
4213 stli_brdstats.type = brdp->brdtype;
4214 stli_brdstats.hwid = 0;
4215 stli_brdstats.state = brdp->state;
4216 stli_brdstats.ioaddr = brdp->iobase;
4217 stli_brdstats.memaddr = brdp->memaddr;
4218 stli_brdstats.nrpanels = brdp->nrpanels;
4219 stli_brdstats.nrports = brdp->nrports;
4220 for (i = 0; (i < brdp->nrpanels); i++) {
4221 stli_brdstats.panels[i].panel = i;
4222 stli_brdstats.panels[i].hwid = brdp->panelids[i];
4223 stli_brdstats.panels[i].nrports = brdp->panels[i];
4226 if (copy_to_user(bp, &stli_brdstats, sizeof(combrd_t)))
4231 /*****************************************************************************/
4234 * Resolve the referenced port number into a port struct pointer.
4237 static struct stliport *stli_getport(int brdnr, int panelnr, int portnr)
4239 struct stlibrd *brdp;
4242 if (brdnr < 0 || brdnr >= STL_MAXBRDS)
4244 brdp = stli_brds[brdnr];
4247 for (i = 0; (i < panelnr); i++)
4248 portnr += brdp->panels[i];
4249 if ((portnr < 0) || (portnr >= brdp->nrports))
4251 return brdp->ports[portnr];
4254 /*****************************************************************************/
4257 * Return the port stats structure to user app. A NULL port struct
4258 * pointer passed in means that we need to find out from the app
4259 * what port to get stats for (used through board control device).
4262 static int stli_portcmdstats(struct stliport *portp)
4264 unsigned long flags;
4265 struct stlibrd *brdp;
4268 memset(&stli_comstats, 0, sizeof(comstats_t));
4272 brdp = stli_brds[portp->brdnr];
4276 if (brdp->state & BST_STARTED) {
4277 if ((rc = stli_cmdwait(brdp, portp, A_GETSTATS,
4278 &stli_cdkstats, sizeof(asystats_t), 1)) < 0)
4281 memset(&stli_cdkstats, 0, sizeof(asystats_t));
4284 stli_comstats.brd = portp->brdnr;
4285 stli_comstats.panel = portp->panelnr;
4286 stli_comstats.port = portp->portnr;
4287 stli_comstats.state = portp->state;
4288 stli_comstats.flags = portp->flags;
4290 spin_lock_irqsave(&brd_lock, flags);
4291 if (portp->tty != NULL) {
4292 if (portp->tty->driver_data == portp) {
4293 stli_comstats.ttystate = portp->tty->flags;
4294 stli_comstats.rxbuffered = -1;
4295 if (portp->tty->termios != NULL) {
4296 stli_comstats.cflags = portp->tty->termios->c_cflag;
4297 stli_comstats.iflags = portp->tty->termios->c_iflag;
4298 stli_comstats.oflags = portp->tty->termios->c_oflag;
4299 stli_comstats.lflags = portp->tty->termios->c_lflag;
4303 spin_unlock_irqrestore(&brd_lock, flags);
4305 stli_comstats.txtotal = stli_cdkstats.txchars;
4306 stli_comstats.rxtotal = stli_cdkstats.rxchars + stli_cdkstats.ringover;
4307 stli_comstats.txbuffered = stli_cdkstats.txringq;
4308 stli_comstats.rxbuffered += stli_cdkstats.rxringq;
4309 stli_comstats.rxoverrun = stli_cdkstats.overruns;
4310 stli_comstats.rxparity = stli_cdkstats.parity;
4311 stli_comstats.rxframing = stli_cdkstats.framing;
4312 stli_comstats.rxlost = stli_cdkstats.ringover;
4313 stli_comstats.rxbreaks = stli_cdkstats.rxbreaks;
4314 stli_comstats.txbreaks = stli_cdkstats.txbreaks;
4315 stli_comstats.txxon = stli_cdkstats.txstart;
4316 stli_comstats.txxoff = stli_cdkstats.txstop;
4317 stli_comstats.rxxon = stli_cdkstats.rxstart;
4318 stli_comstats.rxxoff = stli_cdkstats.rxstop;
4319 stli_comstats.rxrtsoff = stli_cdkstats.rtscnt / 2;
4320 stli_comstats.rxrtson = stli_cdkstats.rtscnt - stli_comstats.rxrtsoff;
4321 stli_comstats.modem = stli_cdkstats.dcdcnt;
4322 stli_comstats.hwid = stli_cdkstats.hwid;
4323 stli_comstats.signals = stli_mktiocm(stli_cdkstats.signals);
4328 /*****************************************************************************/
4331 * Return the port stats structure to user app. A NULL port struct
4332 * pointer passed in means that we need to find out from the app
4333 * what port to get stats for (used through board control device).
4336 static int stli_getportstats(struct stliport *portp, comstats_t __user *cp)
4338 struct stlibrd *brdp;
4342 if (copy_from_user(&stli_comstats, cp, sizeof(comstats_t)))
4344 portp = stli_getport(stli_comstats.brd, stli_comstats.panel,
4345 stli_comstats.port);
4350 brdp = stli_brds[portp->brdnr];
4354 if ((rc = stli_portcmdstats(portp)) < 0)
4357 return copy_to_user(cp, &stli_comstats, sizeof(comstats_t)) ?
4361 /*****************************************************************************/
4364 * Clear the port stats structure. We also return it zeroed out...
4367 static int stli_clrportstats(struct stliport *portp, comstats_t __user *cp)
4369 struct stlibrd *brdp;
4373 if (copy_from_user(&stli_comstats, cp, sizeof(comstats_t)))
4375 portp = stli_getport(stli_comstats.brd, stli_comstats.panel,
4376 stli_comstats.port);
4381 brdp = stli_brds[portp->brdnr];
4385 if (brdp->state & BST_STARTED) {
4386 if ((rc = stli_cmdwait(brdp, portp, A_CLEARSTATS, NULL, 0, 0)) < 0)
4390 memset(&stli_comstats, 0, sizeof(comstats_t));
4391 stli_comstats.brd = portp->brdnr;
4392 stli_comstats.panel = portp->panelnr;
4393 stli_comstats.port = portp->portnr;
4395 if (copy_to_user(cp, &stli_comstats, sizeof(comstats_t)))
4400 /*****************************************************************************/
4403 * Return the entire driver ports structure to a user app.
4406 static int stli_getportstruct(struct stliport __user *arg)
4408 struct stliport *portp;
4410 if (copy_from_user(&stli_dummyport, arg, sizeof(struct stliport)))
4412 portp = stli_getport(stli_dummyport.brdnr, stli_dummyport.panelnr,
4413 stli_dummyport.portnr);
4416 if (copy_to_user(arg, portp, sizeof(struct stliport)))
4421 /*****************************************************************************/
4424 * Return the entire driver board structure to a user app.
4427 static int stli_getbrdstruct(struct stlibrd __user *arg)
4429 struct stlibrd *brdp;
4431 if (copy_from_user(&stli_dummybrd, arg, sizeof(struct stlibrd)))
4433 if ((stli_dummybrd.brdnr < 0) || (stli_dummybrd.brdnr >= STL_MAXBRDS))
4435 brdp = stli_brds[stli_dummybrd.brdnr];
4438 if (copy_to_user(arg, brdp, sizeof(struct stlibrd)))
4443 /*****************************************************************************/
4446 * The "staliomem" device is also required to do some special operations on
4447 * the board. We need to be able to send an interrupt to the board,
4448 * reset it, and start/stop it.
4451 static int stli_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg)
4453 struct stlibrd *brdp;
4454 int brdnr, rc, done;
4455 void __user *argp = (void __user *)arg;
4458 * First up handle the board independent ioctls.
4464 case COM_GETPORTSTATS:
4465 rc = stli_getportstats(NULL, argp);
4468 case COM_CLRPORTSTATS:
4469 rc = stli_clrportstats(NULL, argp);
4472 case COM_GETBRDSTATS:
4473 rc = stli_getbrdstats(argp);
4477 rc = stli_getportstruct(argp);
4481 rc = stli_getbrdstruct(argp);
4490 * Now handle the board specific ioctls. These all depend on the
4491 * minor number of the device they were called from.
4494 if (brdnr >= STL_MAXBRDS)
4496 brdp = stli_brds[brdnr];
4499 if (brdp->state == 0)
4507 rc = stli_startbrd(brdp);
4510 brdp->state &= ~BST_STARTED;
4513 brdp->state &= ~BST_STARTED;
4515 if (stli_shared == 0) {
4516 if (brdp->reenable != NULL)
4517 (* brdp->reenable)(brdp);
4527 static const struct tty_operations stli_ops = {
4529 .close = stli_close,
4530 .write = stli_write,
4531 .put_char = stli_putchar,
4532 .flush_chars = stli_flushchars,
4533 .write_room = stli_writeroom,
4534 .chars_in_buffer = stli_charsinbuffer,
4535 .ioctl = stli_ioctl,
4536 .set_termios = stli_settermios,
4537 .throttle = stli_throttle,
4538 .unthrottle = stli_unthrottle,
4540 .start = stli_start,
4541 .hangup = stli_hangup,
4542 .flush_buffer = stli_flushbuffer,
4543 .break_ctl = stli_breakctl,
4544 .wait_until_sent = stli_waituntilsent,
4545 .send_xchar = stli_sendxchar,
4546 .read_proc = stli_readproc,
4547 .tiocmget = stli_tiocmget,
4548 .tiocmset = stli_tiocmset,
4551 /*****************************************************************************/
4553 static int __init stli_init(void)
4556 printk(KERN_INFO "%s: version %s\n", stli_drvtitle, stli_drvversion);
4558 spin_lock_init(&stli_lock);
4559 spin_lock_init(&brd_lock);
4563 stli_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS);
4568 * Allocate a temporary write buffer.
4570 stli_txcookbuf = kmalloc(STLI_TXBUFSIZE, GFP_KERNEL);
4571 if (!stli_txcookbuf)
4572 printk(KERN_ERR "STALLION: failed to allocate memory "
4573 "(size=%d)\n", STLI_TXBUFSIZE);
4576 * Set up a character driver for the shared memory region. We need this
4577 * to down load the slave code image. Also it is a useful debugging tool.
4579 if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stli_fsiomem))
4580 printk(KERN_ERR "STALLION: failed to register serial memory "
4583 istallion_class = class_create(THIS_MODULE, "staliomem");
4584 for (i = 0; i < 4; i++)
4585 class_device_create(istallion_class, NULL,
4586 MKDEV(STL_SIOMEMMAJOR, i),
4587 NULL, "staliomem%d", i);
4590 * Set up the tty driver structure and register us as a driver.
4592 stli_serial->owner = THIS_MODULE;
4593 stli_serial->driver_name = stli_drvname;
4594 stli_serial->name = stli_serialname;
4595 stli_serial->major = STL_SERIALMAJOR;
4596 stli_serial->minor_start = 0;
4597 stli_serial->type = TTY_DRIVER_TYPE_SERIAL;
4598 stli_serial->subtype = SERIAL_TYPE_NORMAL;
4599 stli_serial->init_termios = stli_deftermios;
4600 stli_serial->flags = TTY_DRIVER_REAL_RAW;
4601 tty_set_operations(stli_serial, &stli_ops);
4603 if (tty_register_driver(stli_serial)) {
4604 put_tty_driver(stli_serial);
4605 printk(KERN_ERR "STALLION: failed to register serial driver\n");
4611 /*****************************************************************************/