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gerrit-public.fairphone.software / kernel / msm-4.9 / def9391c561c60e9d0aab58abca5404acef1de4b / . / drivers / char / ip2main.c
blob: 48fcfba37bfaafd5d0a44a772d8e0182225c07c7 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1/*
2*
3* (c) 1999 by Computone Corporation
4*
5********************************************************************************
6*
7* PACKAGE: Linux tty Device Driver for IntelliPort family of multiport
8* serial I/O controllers.
9*
10* DESCRIPTION: Mainline code for the device driver
11*
12*******************************************************************************/
13// ToDo:
14//
15// Fix the immediate DSS_NOW problem.
16// Work over the channel stats return logic in ip2_ipl_ioctl so they
17// make sense for all 256 possible channels and so the user space
18// utilities will compile and work properly.
19//
20// Done:
21//
22// 1.2.14 /\/\|=mhw=|\/\/
23// Added bounds checking to ip2_ipl_ioctl to avoid potential terroristic acts.
24// Changed the definition of ip2trace to be more consistent with kernel style
25// Thanks to Andreas Dilger <adilger@turbolabs.com> for these updates
26//
27// 1.2.13 /\/\|=mhw=|\/\/
28// DEVFS: Renamed ttf/{n} to tts/F{n} and cuf/{n} to cua/F{n} to conform
29// to agreed devfs serial device naming convention.
30//
31// 1.2.12 /\/\|=mhw=|\/\/
32// Cleaned up some remove queue cut and paste errors
33//
34// 1.2.11 /\/\|=mhw=|\/\/
35// Clean up potential NULL pointer dereferences
36// Clean up devfs registration
37// Add kernel command line parsing for io and irq
38// Compile defaults for io and irq are now set in ip2.c not ip2/ip2.h!
39// Reworked poll_only hack for explicit parameter setting
40// You must now EXPLICITLY set poll_only = 1 or set all irqs to 0
41// Merged ip2_loadmain and old_ip2_init
42// Converted all instances of interruptible_sleep_on into queue calls
43// Most of these had no race conditions but better to clean up now
44//
45// 1.2.10 /\/\|=mhw=|\/\/
46// Fixed the bottom half interrupt handler and enabled USE_IQI
47// to split the interrupt handler into a formal top-half / bottom-half
48// Fixed timing window on high speed processors that queued messages to
49// the outbound mail fifo faster than the board could handle.
50//
51// 1.2.9
52// Four box EX was barfing on >128k kmalloc, made structure smaller by
53// reducing output buffer size
54//
55// 1.2.8
56// Device file system support (MHW)
57//
58// 1.2.7
59// Fixed
60// Reload of ip2 without unloading ip2main hangs system on cat of /proc/modules
61//
62// 1.2.6
63//Fixes DCD problems
64// DCD was not reported when CLOCAL was set on call to TIOCMGET
65//
66//Enhancements:
67// TIOCMGET requests and waits for status return
68// No DSS interrupts enabled except for DCD when needed
69//
70// For internal use only
71//
72//#define IP2DEBUG_INIT
73//#define IP2DEBUG_OPEN
74//#define IP2DEBUG_WRITE
75//#define IP2DEBUG_READ
76//#define IP2DEBUG_IOCTL
77//#define IP2DEBUG_IPL
78
79//#define IP2DEBUG_TRACE
80//#define DEBUG_FIFO
81
82/************/
83/* Includes */
84/************/
85#include <linux/config.h>
86
87#include <linux/ctype.h>
88#include <linux/string.h>
89#include <linux/fcntl.h>
90#include <linux/errno.h>
91#include <linux/module.h>
92#include <linux/signal.h>
93#include <linux/sched.h>
94#include <linux/devfs_fs_kernel.h>
95#include <linux/timer.h>
96#include <linux/interrupt.h>
97#include <linux/pci.h>
98#include <linux/mm.h>
99#include <linux/slab.h>
100#include <linux/major.h>
101#include <linux/wait.h>
102#include <linux/device.h>
103
104#include <linux/tty.h>
105#include <linux/tty_flip.h>
106#include <linux/termios.h>
107#include <linux/tty_driver.h>
108#include <linux/serial.h>
109#include <linux/ptrace.h>
110#include <linux/ioport.h>
111
112#include <linux/cdk.h>
113#include <linux/comstats.h>
114#include <linux/delay.h>
115#include <linux/bitops.h>
116
117#include <asm/system.h>
118#include <asm/io.h>
119#include <asm/irq.h>
120
121#include <linux/vmalloc.h>
122#include <linux/init.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]123
124#include <asm/uaccess.h>
125
126#include "./ip2/ip2types.h"
127#include "./ip2/ip2trace.h"
128#include "./ip2/ip2ioctl.h"
129#include "./ip2/ip2.h"
130#include "./ip2/i2ellis.h"
131#include "./ip2/i2lib.h"
132
133/*****************
134 * /proc/ip2mem *
135 *****************/
136
137#include <linux/proc_fs.h>
138
139static int ip2_read_procmem(char *, char **, off_t, int);
140static int ip2_read_proc(char *, char **, off_t, int, int *, void * );
141
142/********************/
143/* Type Definitions */
144/********************/
145
146/*************/
147/* Constants */
148/*************/
149
150/* String constants to identify ourselves */
151static char *pcName = "Computone IntelliPort Plus multiport driver";
152static char *pcVersion = "1.2.14";
153
154/* String constants for port names */
155static char *pcDriver_name = "ip2";
156static char *pcIpl = "ip2ipl";
157
158/* Serial subtype definitions */
159#define SERIAL_TYPE_NORMAL 1
160
161// cheezy kludge or genius - you decide?
162int ip2_loadmain(int *, int *, unsigned char *, int);
163static unsigned char *Fip_firmware;
164static int Fip_firmware_size;
165
166/***********************/
167/* Function Prototypes */
168/***********************/
169
170/* Global module entry functions */
171
172/* Private (static) functions */
173static int ip2_open(PTTY, struct file *);
174static void ip2_close(PTTY, struct file *);
Alan Coxd9e39532006-01-09 20:54:20 -0800[diff] [blame]175static int ip2_write(PTTY, const unsigned char *, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]176static void ip2_putchar(PTTY, unsigned char);
177static void ip2_flush_chars(PTTY);
178static int ip2_write_room(PTTY);
179static int ip2_chars_in_buf(PTTY);
180static void ip2_flush_buffer(PTTY);
181static int ip2_ioctl(PTTY, struct file *, UINT, ULONG);
182static void ip2_set_termios(PTTY, struct termios *);
183static void ip2_set_line_discipline(PTTY);
184static void ip2_throttle(PTTY);
185static void ip2_unthrottle(PTTY);
186static void ip2_stop(PTTY);
187static void ip2_start(PTTY);
188static void ip2_hangup(PTTY);
189static int ip2_tiocmget(struct tty_struct *tty, struct file *file);
190static int ip2_tiocmset(struct tty_struct *tty, struct file *file,
191 unsigned int set, unsigned int clear);
192
193static void set_irq(int, int);
194static void ip2_interrupt_bh(i2eBordStrPtr pB);
195static irqreturn_t ip2_interrupt(int irq, void *dev_id, struct pt_regs * regs);
196static void ip2_poll(unsigned long arg);
197static inline void service_all_boards(void);
198static void do_input(void *p);
199static void do_status(void *p);
200
201static void ip2_wait_until_sent(PTTY,int);
202
203static void set_params (i2ChanStrPtr, struct termios *);
204static int get_serial_info(i2ChanStrPtr, struct serial_struct __user *);
205static int set_serial_info(i2ChanStrPtr, struct serial_struct __user *);
206
207static ssize_t ip2_ipl_read(struct file *, char __user *, size_t, loff_t *);
208static ssize_t ip2_ipl_write(struct file *, const char __user *, size_t, loff_t *);
209static int ip2_ipl_ioctl(struct inode *, struct file *, UINT, ULONG);
210static int ip2_ipl_open(struct inode *, struct file *);
211
212static int DumpTraceBuffer(char __user *, int);
213static int DumpFifoBuffer( char __user *, int);
214
215static void ip2_init_board(int);
216static unsigned short find_eisa_board(int);
217
218/***************/
219/* Static Data */
220/***************/
221
222static struct tty_driver *ip2_tty_driver;
223
224/* Here, then is a table of board pointers which the interrupt routine should
225 * scan through to determine who it must service.
226 */
227static unsigned short i2nBoards; // Number of boards here
228
229static i2eBordStrPtr i2BoardPtrTable[IP2_MAX_BOARDS];
230
231static i2ChanStrPtr DevTable[IP2_MAX_PORTS];
232//DevTableMem just used to save addresses for kfree
233static void *DevTableMem[IP2_MAX_BOARDS];
234
235/* This is the driver descriptor for the ip2ipl device, which is used to
236 * download the loadware to the boards.
237 */
238static struct file_operations ip2_ipl = {
239 .owner = THIS_MODULE,
240 .read = ip2_ipl_read,
241 .write = ip2_ipl_write,
242 .ioctl = ip2_ipl_ioctl,
243 .open = ip2_ipl_open,
244};
245
246static unsigned long irq_counter = 0;
247static unsigned long bh_counter = 0;
248
249// Use immediate queue to service interrupts
250#define USE_IQI
251//#define USE_IQ // PCI&2.2 needs work
252
253/* The timer_list entry for our poll routine. If interrupt operation is not
254 * selected, the board is serviced periodically to see if anything needs doing.
255 */
256#define POLL_TIMEOUT (jiffies + 1)
Ingo Molnar8d06afa2005-09-09 13:10:40 -0700[diff] [blame]257static DEFINE_TIMER(PollTimer, ip2_poll, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]258static char TimerOn;
259
260#ifdef IP2DEBUG_TRACE
261/* Trace (debug) buffer data */
262#define TRACEMAX 1000
263static unsigned long tracebuf[TRACEMAX];
264static int tracestuff;
265static int tracestrip;
266static int tracewrap;
267#endif
268
269/**********/
270/* Macros */
271/**********/
272
273#if defined(MODULE) && defined(IP2DEBUG_OPEN)
274#define DBG_CNT(s) printk(KERN_DEBUG "(%s): [%x] refc=%d, ttyc=%d, modc=%x -> %s\n", \
275 tty->name,(pCh->flags),ip2_tty_driver->refcount, \
276 tty->count,/*GET_USE_COUNT(module)*/0,s)
277#else
278#define DBG_CNT(s)
279#endif
280
281/********/
282/* Code */
283/********/
284
285#include "./ip2/i2ellis.c" /* Extremely low-level interface services */
286#include "./ip2/i2cmd.c" /* Standard loadware command definitions */
287#include "./ip2/i2lib.c" /* High level interface services */
288
289/* Configuration area for modprobe */
290
291MODULE_AUTHOR("Doug McNash");
292MODULE_DESCRIPTION("Computone IntelliPort Plus Driver");
293
294static int poll_only = 0;
295
296static int Eisa_irq;
297static int Eisa_slot;
298
299static int iindx;
300static char rirqs[IP2_MAX_BOARDS];
301static int Valid_Irqs[] = { 3, 4, 5, 7, 10, 11, 12, 15, 0};
302
303/* for sysfs class support */
gregkh@suse.deca8eca62005-03-23 09:53:09 -0800[diff] [blame]304static struct class *ip2_class;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]305
306// Some functions to keep track of what irq's we have
307
308static int __init
309is_valid_irq(int irq)
310{
311 int *i = Valid_Irqs;
312
313 while ((*i != 0) && (*i != irq)) {
314 i++;
315 }
316 return (*i);
317}
318
319static void __init
320mark_requested_irq( char irq )
321{
322 rirqs[iindx++] = irq;
323}
324
325#ifdef MODULE
326static int __init
327clear_requested_irq( char irq )
328{
329 int i;
330 for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
331 if (rirqs[i] == irq) {
332 rirqs[i] = 0;
333 return 1;
334 }
335 }
336 return 0;
337}
338#endif
339
340static int __init
341have_requested_irq( char irq )
342{
343 // array init to zeros so 0 irq will not be requested as a side effect
344 int i;
345 for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
346 if (rirqs[i] == irq)
347 return 1;
348 }
349 return 0;
350}
351
352/******************************************************************************/
353/* Function: init_module() */
354/* Parameters: None */
355/* Returns: Success (0) */
356/* */
357/* Description: */
358/* This is a required entry point for an installable module. It simply calls */
359/* the driver initialisation function and returns what it returns. */
360/******************************************************************************/
361#ifdef MODULE
362int
363init_module(void)
364{
365#ifdef IP2DEBUG_INIT
366 printk (KERN_DEBUG "Loading module ...\n" );
367#endif
368 return 0;
369}
370#endif /* MODULE */
371
372/******************************************************************************/
373/* Function: cleanup_module() */
374/* Parameters: None */
375/* Returns: Nothing */
376/* */
377/* Description: */
378/* This is a required entry point for an installable module. It has to return */
379/* the device and the driver to a passive state. It should not be necessary */
380/* to reset the board fully, especially as the loadware is downloaded */
381/* externally rather than in the driver. We just want to disable the board */
382/* and clear the loadware to a reset state. To allow this there has to be a */
383/* way to detect whether the board has the loadware running at init time to */
384/* handle subsequent installations of the driver. All memory allocated by the */
385/* driver should be returned since it may be unloaded from memory. */
386/******************************************************************************/
387#ifdef MODULE
388void
389cleanup_module(void)
390{
391 int err;
392 int i;
393
394#ifdef IP2DEBUG_INIT
395 printk (KERN_DEBUG "Unloading %s: version %s\n", pcName, pcVersion );
396#endif
397 /* Stop poll timer if we had one. */
398 if ( TimerOn ) {
399 del_timer ( &PollTimer );
400 TimerOn = 0;
401 }
402
403 /* Reset the boards we have. */
404 for( i = 0; i < IP2_MAX_BOARDS; ++i ) {
405 if ( i2BoardPtrTable[i] ) {
406 iiReset( i2BoardPtrTable[i] );
407 }
408 }
409
410 /* The following is done at most once, if any boards were installed. */
411 for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
412 if ( i2BoardPtrTable[i] ) {
413 iiResetDelay( i2BoardPtrTable[i] );
414 /* free io addresses and Tibet */
415 release_region( ip2config.addr[i], 8 );
gregkh@suse.deca8eca62005-03-23 09:53:09 -0800[diff] [blame]416 class_device_destroy(ip2_class, MKDEV(IP2_IPL_MAJOR, 4 * i));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]417 devfs_remove("ip2/ipl%d", i);
gregkh@suse.deca8eca62005-03-23 09:53:09 -0800[diff] [blame]418 class_device_destroy(ip2_class, MKDEV(IP2_IPL_MAJOR, 4 * i + 1));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]419 devfs_remove("ip2/stat%d", i);
420 }
421 /* Disable and remove interrupt handler. */
422 if ( (ip2config.irq[i] > 0) && have_requested_irq(ip2config.irq[i]) ) {
423 free_irq ( ip2config.irq[i], (void *)&pcName);
424 clear_requested_irq( ip2config.irq[i]);
425 }
426 }
gregkh@suse.deca8eca62005-03-23 09:53:09 -0800[diff] [blame]427 class_destroy(ip2_class);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]428 devfs_remove("ip2");
429 if ( ( err = tty_unregister_driver ( ip2_tty_driver ) ) ) {
430 printk(KERN_ERR "IP2: failed to unregister tty driver (%d)\n", err);
431 }
432 put_tty_driver(ip2_tty_driver);
433 if ( ( err = unregister_chrdev ( IP2_IPL_MAJOR, pcIpl ) ) ) {
434 printk(KERN_ERR "IP2: failed to unregister IPL driver (%d)\n", err);
435 }
436 remove_proc_entry("ip2mem", &proc_root);
437
438 // free memory
439 for (i = 0; i < IP2_MAX_BOARDS; i++) {
440 void *pB;
441#ifdef CONFIG_PCI
442 if (ip2config.type[i] == PCI && ip2config.pci_dev[i]) {
443 pci_disable_device(ip2config.pci_dev[i]);
444 ip2config.pci_dev[i] = NULL;
445 }
446#endif
447 if ((pB = i2BoardPtrTable[i]) != 0 ) {
448 kfree ( pB );
449 i2BoardPtrTable[i] = NULL;
450 }
451 if ((DevTableMem[i]) != NULL ) {
452 kfree ( DevTableMem[i] );
453 DevTableMem[i] = NULL;
454 }
455 }
456
457 /* Cleanup the iiEllis subsystem. */
458 iiEllisCleanup();
459#ifdef IP2DEBUG_INIT
460 printk (KERN_DEBUG "IP2 Unloaded\n" );
461#endif
462}
463#endif /* MODULE */
464
465static struct tty_operations ip2_ops = {
466 .open = ip2_open,
467 .close = ip2_close,
468 .write = ip2_write,
469 .put_char = ip2_putchar,
470 .flush_chars = ip2_flush_chars,
471 .write_room = ip2_write_room,
472 .chars_in_buffer = ip2_chars_in_buf,
473 .flush_buffer = ip2_flush_buffer,
474 .ioctl = ip2_ioctl,
475 .throttle = ip2_throttle,
476 .unthrottle = ip2_unthrottle,
477 .set_termios = ip2_set_termios,
478 .set_ldisc = ip2_set_line_discipline,
479 .stop = ip2_stop,
480 .start = ip2_start,
481 .hangup = ip2_hangup,
482 .read_proc = ip2_read_proc,
483 .tiocmget = ip2_tiocmget,
484 .tiocmset = ip2_tiocmset,
485};
486
487/******************************************************************************/
488/* Function: ip2_loadmain() */
489/* Parameters: irq, io from command line of insmod et. al. */
490/* pointer to fip firmware and firmware size for boards */
491/* Returns: Success (0) */
492/* */
493/* Description: */
494/* This was the required entry point for all drivers (now in ip2.c) */
495/* It performs all */
496/* initialisation of the devices and driver structures, and registers itself */
497/* with the relevant kernel modules. */
498/******************************************************************************/
499/* SA_INTERRUPT- if set blocks all interrupts else only this line */
500/* SA_SHIRQ - for shared irq PCI or maybe EISA only */
501/* SA_RANDOM - can be source for cert. random number generators */
502#define IP2_SA_FLAGS 0
503
504int
505ip2_loadmain(int *iop, int *irqp, unsigned char *firmware, int firmsize)
506{
507 int i, j, box;
508 int err = 0;
509 int status = 0;
510 static int loaded;
511 i2eBordStrPtr pB = NULL;
512 int rc = -1;
513
514 ip2trace (ITRC_NO_PORT, ITRC_INIT, ITRC_ENTER, 0 );
515
516 /* process command line arguments to modprobe or
517 insmod i.e. iop & irqp */
518 /* irqp and iop should ALWAYS be specified now... But we check
519 them individually just to be sure, anyways... */
520 for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
521 if (iop) {
522 ip2config.addr[i] = iop[i];
523 if (irqp) {
524 if( irqp[i] >= 0 ) {
525 ip2config.irq[i] = irqp[i];
526 } else {
527 ip2config.irq[i] = 0;
528 }
529 // This is a little bit of a hack. If poll_only=1 on command
530 // line back in ip2.c OR all IRQs on all specified boards are
531 // explicitly set to 0, then drop to poll only mode and override
532 // PCI or EISA interrupts. This superceeds the old hack of
533 // triggering if all interrupts were zero (like da default).
534 // Still a hack but less prone to random acts of terrorism.
535 //
536 // What we really should do, now that the IRQ default is set
537 // to -1, is to use 0 as a hard coded, do not probe.
538 //
539 // /\/\|=mhw=|\/\/
540 poll_only |= irqp[i];
541 }
542 }
543 }
544 poll_only = !poll_only;
545
546 Fip_firmware = firmware;
547 Fip_firmware_size = firmsize;
548
549 /* Announce our presence */
550 printk( KERN_INFO "%s version %s\n", pcName, pcVersion );
551
552 // ip2 can be unloaded and reloaded for no good reason
553 // we can't let that happen here or bad things happen
554 // second load hoses board but not system - fixme later
555 if (loaded) {
556 printk( KERN_INFO "Still loaded\n" );
557 return 0;
558 }
559 loaded++;
560
561 ip2_tty_driver = alloc_tty_driver(IP2_MAX_PORTS);
562 if (!ip2_tty_driver)
563 return -ENOMEM;
564
565 /* Initialise the iiEllis subsystem. */
566 iiEllisInit();
567
568 /* Initialize arrays. */
569 memset( i2BoardPtrTable, 0, sizeof i2BoardPtrTable );
570 memset( DevTable, 0, sizeof DevTable );
571
572 /* Initialise all the boards we can find (up to the maximum). */
573 for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
574 switch ( ip2config.addr[i] ) {
575 case 0: /* skip this slot even if card is present */
576 break;
577 default: /* ISA */
578 /* ISA address must be specified */
579 if ( (ip2config.addr[i] < 0x100) || (ip2config.addr[i] > 0x3f8) ) {
580 printk ( KERN_ERR "IP2: Bad ISA board %d address %x\n",
581 i, ip2config.addr[i] );
582 ip2config.addr[i] = 0;
583 } else {
584 ip2config.type[i] = ISA;
585
586 /* Check for valid irq argument, set for polling if invalid */
587 if (ip2config.irq[i] && !is_valid_irq(ip2config.irq[i])) {
588 printk(KERN_ERR "IP2: Bad IRQ(%d) specified\n",ip2config.irq[i]);
589 ip2config.irq[i] = 0;// 0 is polling and is valid in that sense
590 }
591 }
592 break;
593 case PCI:
594#ifdef CONFIG_PCI
595 {
596 struct pci_dev *pci_dev_i = NULL;
597 pci_dev_i = pci_find_device(PCI_VENDOR_ID_COMPUTONE,
598 PCI_DEVICE_ID_COMPUTONE_IP2EX, pci_dev_i);
599 if (pci_dev_i != NULL) {
600 unsigned int addr;
601
602 if (pci_enable_device(pci_dev_i)) {
603 printk( KERN_ERR "IP2: can't enable PCI device at %s\n",
604 pci_name(pci_dev_i));
605 break;
606 }
607 ip2config.type[i] = PCI;
608 ip2config.pci_dev[i] = pci_dev_i;
609 status =
610 pci_read_config_dword(pci_dev_i, PCI_BASE_ADDRESS_1, &addr);
611 if ( addr & 1 ) {
612 ip2config.addr[i]=(USHORT)(addr&0xfffe);
613 } else {
614 printk( KERN_ERR "IP2: PCI I/O address error\n");
615 }
616
617// If the PCI BIOS assigned it, lets try and use it. If we
618// can't acquire it or it screws up, deal with it then.
619
620// if (!is_valid_irq(pci_irq)) {
621// printk( KERN_ERR "IP2: Bad PCI BIOS IRQ(%d)\n",pci_irq);
622// pci_irq = 0;
623// }
624 ip2config.irq[i] = pci_dev_i->irq;
625 } else { // ann error
626 ip2config.addr[i] = 0;
627 if (status == PCIBIOS_DEVICE_NOT_FOUND) {
628 printk( KERN_ERR "IP2: PCI board %d not found\n", i );
629 } else {
630 printk( KERN_ERR "IP2: PCI error 0x%x \n", status );
631 }
632 }
633 }
634#else
635 printk( KERN_ERR "IP2: PCI card specified but PCI support not\n");
636 printk( KERN_ERR "IP2: configured in this kernel.\n");
637 printk( KERN_ERR "IP2: Recompile kernel with CONFIG_PCI defined!\n");
638#endif /* CONFIG_PCI */
639 break;
640 case EISA:
641 if ( (ip2config.addr[i] = find_eisa_board( Eisa_slot + 1 )) != 0) {
642 /* Eisa_irq set as side effect, boo */
643 ip2config.type[i] = EISA;
644 }
645 ip2config.irq[i] = Eisa_irq;
646 break;
647 } /* switch */
648 } /* for */
649 for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
650 if ( ip2config.addr[i] ) {
651 pB = kmalloc( sizeof(i2eBordStr), GFP_KERNEL);
652 if ( pB != NULL ) {
653 i2BoardPtrTable[i] = pB;
654 memset( pB, 0, sizeof(i2eBordStr) );
655 iiSetAddress( pB, ip2config.addr[i], ii2DelayTimer );
656 iiReset( pB );
657 } else {
658 printk(KERN_ERR "IP2: board memory allocation error\n");
659 }
660 }
661 }
662 for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
663 if ( ( pB = i2BoardPtrTable[i] ) != NULL ) {
664 iiResetDelay( pB );
665 break;
666 }
667 }
668 for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
669 if ( i2BoardPtrTable[i] != NULL ) {
670 ip2_init_board( i );
671 }
672 }
673
674 ip2trace (ITRC_NO_PORT, ITRC_INIT, 2, 0 );
675
676 ip2_tty_driver->owner = THIS_MODULE;
677 ip2_tty_driver->name = "ttyF";
678 ip2_tty_driver->devfs_name = "tts/F";
679 ip2_tty_driver->driver_name = pcDriver_name;
680 ip2_tty_driver->major = IP2_TTY_MAJOR;
681 ip2_tty_driver->minor_start = 0;
682 ip2_tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
683 ip2_tty_driver->subtype = SERIAL_TYPE_NORMAL;
684 ip2_tty_driver->init_termios = tty_std_termios;
685 ip2_tty_driver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
686 ip2_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
687 tty_set_operations(ip2_tty_driver, &ip2_ops);
688
689 ip2trace (ITRC_NO_PORT, ITRC_INIT, 3, 0 );
690
691 /* Register the tty devices. */
692 if ( ( err = tty_register_driver ( ip2_tty_driver ) ) ) {
693 printk(KERN_ERR "IP2: failed to register tty driver (%d)\n", err);
694 put_tty_driver(ip2_tty_driver);
695 return -EINVAL;
696 } else
697 /* Register the IPL driver. */
698 if ( ( err = register_chrdev ( IP2_IPL_MAJOR, pcIpl, &ip2_ipl ) ) ) {
699 printk(KERN_ERR "IP2: failed to register IPL device (%d)\n", err );
700 } else {
701 /* create the sysfs class */
gregkh@suse.deca8eca62005-03-23 09:53:09 -0800[diff] [blame]702 ip2_class = class_create(THIS_MODULE, "ip2");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]703 if (IS_ERR(ip2_class)) {
704 err = PTR_ERR(ip2_class);
705 goto out_chrdev;
706 }
707 }
708 /* Register the read_procmem thing */
709 if (!create_proc_info_entry("ip2mem",0,&proc_root,ip2_read_procmem)) {
710 printk(KERN_ERR "IP2: failed to register read_procmem\n");
711 } else {
712
713 ip2trace (ITRC_NO_PORT, ITRC_INIT, 4, 0 );
714 /* Register the interrupt handler or poll handler, depending upon the
715 * specified interrupt.
716 */
717
718 for( i = 0; i < IP2_MAX_BOARDS; ++i ) {
719 if ( 0 == ip2config.addr[i] ) {
720 continue;
721 }
722
723 if ( NULL != ( pB = i2BoardPtrTable[i] ) ) {
Greg Kroah-Hartman53f46542005-10-27 22:25:43 -0700[diff] [blame]724 class_device_create(ip2_class, NULL,
725 MKDEV(IP2_IPL_MAJOR, 4 * i),
726 NULL, "ipl%d", i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]727 err = devfs_mk_cdev(MKDEV(IP2_IPL_MAJOR, 4 * i),
728 S_IRUSR | S_IWUSR | S_IRGRP | S_IFCHR,
729 "ip2/ipl%d", i);
730 if (err) {
gregkh@suse.deca8eca62005-03-23 09:53:09 -0800[diff] [blame]731 class_device_destroy(ip2_class,
732 MKDEV(IP2_IPL_MAJOR, 4 * i));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]733 goto out_class;
734 }
735
Greg Kroah-Hartman53f46542005-10-27 22:25:43 -0700[diff] [blame]736 class_device_create(ip2_class, NULL,
737 MKDEV(IP2_IPL_MAJOR, 4 * i + 1),
738 NULL, "stat%d", i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]739 err = devfs_mk_cdev(MKDEV(IP2_IPL_MAJOR, 4 * i + 1),
740 S_IRUSR | S_IWUSR | S_IRGRP | S_IFCHR,
741 "ip2/stat%d", i);
742 if (err) {
gregkh@suse.deca8eca62005-03-23 09:53:09 -0800[diff] [blame]743 class_device_destroy(ip2_class,
744 MKDEV(IP2_IPL_MAJOR, 4 * i + 1));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]745 goto out_class;
746 }
747
748 for ( box = 0; box < ABS_MAX_BOXES; ++box )
749 {
750 for ( j = 0; j < ABS_BIGGEST_BOX; ++j )
751 {
752 if ( pB->i2eChannelMap[box] & (1 << j) )
753 {
754 tty_register_device(ip2_tty_driver,
755 j + ABS_BIGGEST_BOX *
756 (box+i*ABS_MAX_BOXES), NULL);
757 }
758 }
759 }
760 }
761
762 if (poll_only) {
763// Poll only forces driver to only use polling and
764// to ignore the probed PCI or EISA interrupts.
765 ip2config.irq[i] = CIR_POLL;
766 }
767 if ( ip2config.irq[i] == CIR_POLL ) {
768retry:
769 if (!TimerOn) {
770 PollTimer.expires = POLL_TIMEOUT;
771 add_timer ( &PollTimer );
772 TimerOn = 1;
773 printk( KERN_INFO "IP2: polling\n");
774 }
775 } else {
776 if (have_requested_irq(ip2config.irq[i]))
777 continue;
778 rc = request_irq( ip2config.irq[i], ip2_interrupt,
779 IP2_SA_FLAGS | (ip2config.type[i] == PCI ? SA_SHIRQ : 0),
780 pcName, (void *)&pcName);
781 if (rc) {
782 printk(KERN_ERR "IP2: an request_irq failed: error %d\n",rc);
783 ip2config.irq[i] = CIR_POLL;
784 printk( KERN_INFO "IP2: Polling %ld/sec.\n",
785 (POLL_TIMEOUT - jiffies));
786 goto retry;
787 }
788 mark_requested_irq(ip2config.irq[i]);
789 /* Initialise the interrupt handler bottom half (aka slih). */
790 }
791 }
792 for( i = 0; i < IP2_MAX_BOARDS; ++i ) {
793 if ( i2BoardPtrTable[i] ) {
794 set_irq( i, ip2config.irq[i] ); /* set and enable board interrupt */
795 }
796 }
797 }
798 ip2trace (ITRC_NO_PORT, ITRC_INIT, ITRC_RETURN, 0 );
799 goto out;
800
801out_class:
gregkh@suse.deca8eca62005-03-23 09:53:09 -0800[diff] [blame]802 class_destroy(ip2_class);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]803out_chrdev:
804 unregister_chrdev(IP2_IPL_MAJOR, "ip2");
805out:
806 return err;
807}
808
809EXPORT_SYMBOL(ip2_loadmain);
810
811/******************************************************************************/
812/* Function: ip2_init_board() */
813/* Parameters: Index of board in configuration structure */
814/* Returns: Success (0) */
815/* */
816/* Description: */
817/* This function initializes the specified board. The loadware is copied to */
818/* the board, the channel structures are initialized, and the board details */
819/* are reported on the console. */
820/******************************************************************************/
821static void __init
822ip2_init_board( int boardnum )
823{
824 int i;
825 int nports = 0, nboxes = 0;
826 i2ChanStrPtr pCh;
827 i2eBordStrPtr pB = i2BoardPtrTable[boardnum];
828
829 if ( !iiInitialize ( pB ) ) {
830 printk ( KERN_ERR "IP2: Failed to initialize board at 0x%x, error %d\n",
831 pB->i2eBase, pB->i2eError );
832 goto err_initialize;
833 }
834 printk(KERN_INFO "IP2: Board %d: addr=0x%x irq=%d\n", boardnum + 1,
835 ip2config.addr[boardnum], ip2config.irq[boardnum] );
836
837 if (!request_region( ip2config.addr[boardnum], 8, pcName )) {
838 printk(KERN_ERR "IP2: bad addr=0x%x\n", ip2config.addr[boardnum]);
839 goto err_initialize;
840 }
841
842 if ( iiDownloadAll ( pB, (loadHdrStrPtr)Fip_firmware, 1, Fip_firmware_size )
843 != II_DOWN_GOOD ) {
844 printk ( KERN_ERR "IP2: failed to download loadware\n" );
845 goto err_release_region;
846 } else {
847 printk ( KERN_INFO "IP2: fv=%d.%d.%d lv=%d.%d.%d\n",
848 pB->i2ePom.e.porVersion,
849 pB->i2ePom.e.porRevision,
850 pB->i2ePom.e.porSubRev, pB->i2eLVersion,
851 pB->i2eLRevision, pB->i2eLSub );
852 }
853
854 switch ( pB->i2ePom.e.porID & ~POR_ID_RESERVED ) {
855
856 default:
857 printk( KERN_ERR "IP2: Unknown board type, ID = %x\n",
858 pB->i2ePom.e.porID );
859 nports = 0;
860 goto err_release_region;
861 break;
862
863 case POR_ID_II_4: /* IntelliPort-II, ISA-4 (4xRJ45) */
864 printk ( KERN_INFO "IP2: ISA-4\n" );
865 nports = 4;
866 break;
867
868 case POR_ID_II_8: /* IntelliPort-II, 8-port using standard brick. */
869 printk ( KERN_INFO "IP2: ISA-8 std\n" );
870 nports = 8;
871 break;
872
873 case POR_ID_II_8R: /* IntelliPort-II, 8-port using RJ11's (no CTS) */
874 printk ( KERN_INFO "IP2: ISA-8 RJ11\n" );
875 nports = 8;
876 break;
877
878 case POR_ID_FIIEX: /* IntelliPort IIEX */
879 {
880 int portnum = IP2_PORTS_PER_BOARD * boardnum;
881 int box;
882
883 for( box = 0; box < ABS_MAX_BOXES; ++box ) {
884 if ( pB->i2eChannelMap[box] != 0 ) {
885 ++nboxes;
886 }
887 for( i = 0; i < ABS_BIGGEST_BOX; ++i ) {
888 if ( pB->i2eChannelMap[box] & 1<< i ) {
889 ++nports;
890 }
891 }
892 }
893 DevTableMem[boardnum] = pCh =
894 kmalloc( sizeof(i2ChanStr) * nports, GFP_KERNEL );
895 if ( !pCh ) {
896 printk ( KERN_ERR "IP2: (i2_init_channel:) Out of memory.\n");
897 goto err_release_region;
898 }
899 if ( !i2InitChannels( pB, nports, pCh ) ) {
900 printk(KERN_ERR "IP2: i2InitChannels failed: %d\n",pB->i2eError);
901 kfree ( pCh );
902 goto err_release_region;
903 }
904 pB->i2eChannelPtr = &DevTable[portnum];
905 pB->i2eChannelCnt = ABS_MOST_PORTS;
906
907 for( box = 0; box < ABS_MAX_BOXES; ++box, portnum += ABS_BIGGEST_BOX ) {
908 for( i = 0; i < ABS_BIGGEST_BOX; ++i ) {
909 if ( pB->i2eChannelMap[box] & (1 << i) ) {
910 DevTable[portnum + i] = pCh;
911 pCh->port_index = portnum + i;
912 pCh++;
913 }
914 }
915 }
916 printk(KERN_INFO "IP2: EX box=%d ports=%d %d bit\n",
917 nboxes, nports, pB->i2eDataWidth16 ? 16 : 8 );
918 }
919 goto ex_exit;
920 }
921 DevTableMem[boardnum] = pCh =
922 kmalloc ( sizeof (i2ChanStr) * nports, GFP_KERNEL );
923 if ( !pCh ) {
924 printk ( KERN_ERR "IP2: (i2_init_channel:) Out of memory.\n");
925 goto err_release_region;
926 }
927 pB->i2eChannelPtr = pCh;
928 pB->i2eChannelCnt = nports;
929 if ( !i2InitChannels( pB, nports, pCh ) ) {
930 printk(KERN_ERR "IP2: i2InitChannels failed: %d\n",pB->i2eError);
931 kfree ( pCh );
932 goto err_release_region;
933 }
934 pB->i2eChannelPtr = &DevTable[IP2_PORTS_PER_BOARD * boardnum];
935
936 for( i = 0; i < pB->i2eChannelCnt; ++i ) {
937 DevTable[IP2_PORTS_PER_BOARD * boardnum + i] = pCh;
938 pCh->port_index = (IP2_PORTS_PER_BOARD * boardnum) + i;
939 pCh++;
940 }
941ex_exit:
942 INIT_WORK(&pB->tqueue_interrupt, (void(*)(void*)) ip2_interrupt_bh, pB);
943 return;
944
945err_release_region:
946 release_region(ip2config.addr[boardnum], 8);
947err_initialize:
948 kfree ( pB );
949 i2BoardPtrTable[boardnum] = NULL;
950 return;
951}
952
953/******************************************************************************/
954/* Function: find_eisa_board ( int start_slot ) */
955/* Parameters: First slot to check */
956/* Returns: Address of EISA IntelliPort II controller */
957/* */
958/* Description: */
959/* This function searches for an EISA IntelliPort controller, starting */
960/* from the specified slot number. If the motherboard is not identified as an */
961/* EISA motherboard, or no valid board ID is selected it returns 0. Otherwise */
962/* it returns the base address of the controller. */
963/******************************************************************************/
964static unsigned short __init
965find_eisa_board( int start_slot )
966{
967 int i, j;
968 unsigned int idm = 0;
969 unsigned int idp = 0;
970 unsigned int base = 0;
971 unsigned int value;
972 int setup_address;
973 int setup_irq;
974 int ismine = 0;
975
976 /*
977 * First a check for an EISA motherboard, which we do by comparing the
978 * EISA ID registers for the system board and the first couple of slots.
979 * No slot ID should match the system board ID, but on an ISA or PCI
980 * machine the odds are that an empty bus will return similar values for
981 * each slot.
982 */
983 i = 0x0c80;
984 value = (inb(i) << 24) + (inb(i+1) << 16) + (inb(i+2) << 8) + inb(i+3);
985 for( i = 0x1c80; i <= 0x4c80; i += 0x1000 ) {
986 j = (inb(i)<<24)+(inb(i+1)<<16)+(inb(i+2)<<8)+inb(i+3);
987 if ( value == j )
988 return 0;
989 }
990
991 /*
992 * OK, so we are inclined to believe that this is an EISA machine. Find
993 * an IntelliPort controller.
994 */
995 for( i = start_slot; i < 16; i++ ) {
996 base = i << 12;
997 idm = (inb(base + 0xc80) << 8) | (inb(base + 0xc81) & 0xff);
998 idp = (inb(base + 0xc82) << 8) | (inb(base + 0xc83) & 0xff);
999 ismine = 0;
1000 if ( idm == 0x0e8e ) {
1001 if ( idp == 0x0281 || idp == 0x0218 ) {
1002 ismine = 1;
1003 } else if ( idp == 0x0282 || idp == 0x0283 ) {
1004 ismine = 3; /* Can do edge-trigger */
1005 }
1006 if ( ismine ) {
1007 Eisa_slot = i;
1008 break;
1009 }
1010 }
1011 }
1012 if ( !ismine )
1013 return 0;
1014
1015 /* It's some sort of EISA card, but at what address is it configured? */
1016
1017 setup_address = base + 0xc88;
1018 value = inb(base + 0xc86);
1019 setup_irq = (value & 8) ? Valid_Irqs[value & 7] : 0;
1020
1021 if ( (ismine & 2) && !(value & 0x10) ) {
1022 ismine = 1; /* Could be edging, but not */
1023 }
1024
1025 if ( Eisa_irq == 0 ) {
1026 Eisa_irq = setup_irq;
1027 } else if ( Eisa_irq != setup_irq ) {
1028 printk ( KERN_ERR "IP2: EISA irq mismatch between EISA controllers\n" );
1029 }
1030
1031#ifdef IP2DEBUG_INIT
1032printk(KERN_DEBUG "Computone EISA board in slot %d, I.D. 0x%x%x, Address 0x%x",
1033 base >> 12, idm, idp, setup_address);
1034 if ( Eisa_irq ) {
1035 printk(KERN_DEBUG ", Interrupt %d %s\n",
1036 setup_irq, (ismine & 2) ? "(edge)" : "(level)");
1037 } else {
1038 printk(KERN_DEBUG ", (polled)\n");
1039 }
1040#endif
1041 return setup_address;
1042}
1043
1044/******************************************************************************/
1045/* Function: set_irq() */
1046/* Parameters: index to board in board table */
1047/* IRQ to use */
1048/* Returns: Success (0) */
1049/* */
1050/* Description: */
1051/******************************************************************************/
1052static void
1053set_irq( int boardnum, int boardIrq )
1054{
1055 unsigned char tempCommand[16];
1056 i2eBordStrPtr pB = i2BoardPtrTable[boardnum];
1057 unsigned long flags;
1058
1059 /*
1060 * Notify the boards they may generate interrupts. This is done by
1061 * sending an in-line command to channel 0 on each board. This is why
1062 * the channels have to be defined already. For each board, if the
1063 * interrupt has never been defined, we must do so NOW, directly, since
1064 * board will not send flow control or even give an interrupt until this
1065 * is done. If polling we must send 0 as the interrupt parameter.
1066 */
1067
1068 // We will get an interrupt here at the end of this function
1069
1070 iiDisableMailIrq(pB);
1071
1072 /* We build up the entire packet header. */
1073 CHANNEL_OF(tempCommand) = 0;
1074 PTYPE_OF(tempCommand) = PTYPE_INLINE;
1075 CMD_COUNT_OF(tempCommand) = 2;
1076 (CMD_OF(tempCommand))[0] = CMDVALUE_IRQ;
1077 (CMD_OF(tempCommand))[1] = boardIrq;
1078 /*
1079 * Write to FIFO; don't bother to adjust fifo capacity for this, since
1080 * board will respond almost immediately after SendMail hit.
1081 */
1082 WRITE_LOCK_IRQSAVE(&pB->write_fifo_spinlock,flags);
1083 iiWriteBuf(pB, tempCommand, 4);
1084 WRITE_UNLOCK_IRQRESTORE(&pB->write_fifo_spinlock,flags);
1085 pB->i2eUsingIrq = boardIrq;
1086 pB->i2eOutMailWaiting |= MB_OUT_STUFFED;
1087
1088 /* Need to update number of boards before you enable mailbox int */
1089 ++i2nBoards;
1090
1091 CHANNEL_OF(tempCommand) = 0;
1092 PTYPE_OF(tempCommand) = PTYPE_BYPASS;
1093 CMD_COUNT_OF(tempCommand) = 6;
1094 (CMD_OF(tempCommand))[0] = 88; // SILO
1095 (CMD_OF(tempCommand))[1] = 64; // chars
1096 (CMD_OF(tempCommand))[2] = 32; // ms
1097
1098 (CMD_OF(tempCommand))[3] = 28; // MAX_BLOCK
1099 (CMD_OF(tempCommand))[4] = 64; // chars
1100
1101 (CMD_OF(tempCommand))[5] = 87; // HW_TEST
1102 WRITE_LOCK_IRQSAVE(&pB->write_fifo_spinlock,flags);
1103 iiWriteBuf(pB, tempCommand, 8);
1104 WRITE_UNLOCK_IRQRESTORE(&pB->write_fifo_spinlock,flags);
1105
1106 CHANNEL_OF(tempCommand) = 0;
1107 PTYPE_OF(tempCommand) = PTYPE_BYPASS;
1108 CMD_COUNT_OF(tempCommand) = 1;
1109 (CMD_OF(tempCommand))[0] = 84; /* get BOX_IDS */
1110 iiWriteBuf(pB, tempCommand, 3);
1111
1112#ifdef XXX
1113 // enable heartbeat for test porpoises
1114 CHANNEL_OF(tempCommand) = 0;
1115 PTYPE_OF(tempCommand) = PTYPE_BYPASS;
1116 CMD_COUNT_OF(tempCommand) = 2;
1117 (CMD_OF(tempCommand))[0] = 44; /* get ping */
1118 (CMD_OF(tempCommand))[1] = 200; /* 200 ms */
1119 WRITE_LOCK_IRQSAVE(&pB->write_fifo_spinlock,flags);
1120 iiWriteBuf(pB, tempCommand, 4);
1121 WRITE_UNLOCK_IRQRESTORE(&pB->write_fifo_spinlock,flags);
1122#endif
1123
1124 iiEnableMailIrq(pB);
1125 iiSendPendingMail(pB);
1126}
1127
1128/******************************************************************************/
1129/* Interrupt Handler Section */
1130/******************************************************************************/
1131
1132static inline void
1133service_all_boards(void)
1134{
1135 int i;
1136 i2eBordStrPtr pB;
1137
1138 /* Service every board on the list */
1139 for( i = 0; i < IP2_MAX_BOARDS; ++i ) {
1140 pB = i2BoardPtrTable[i];
1141 if ( pB ) {
1142 i2ServiceBoard( pB );
1143 }
1144 }
1145}
1146
1147
1148/******************************************************************************/
1149/* Function: ip2_interrupt_bh(pB) */
1150/* Parameters: pB - pointer to the board structure */
1151/* Returns: Nothing */
1152/* */
1153/* Description: */
1154/* Service the board in a bottom half interrupt handler and then */
1155/* reenable the board's interrupts if it has an IRQ number */
1156/* */
1157/******************************************************************************/
1158static void
1159ip2_interrupt_bh(i2eBordStrPtr pB)
1160{
1161// pB better well be set or we have a problem! We can only get
1162// here from the IMMEDIATE queue. Here, we process the boards.
1163// Checking pB doesn't cost much and it saves us from the sanity checkers.
1164
1165 bh_counter++;
1166
1167 if ( pB ) {
1168 i2ServiceBoard( pB );
1169 if( pB->i2eUsingIrq ) {
1170// Re-enable his interrupts
1171 iiEnableMailIrq(pB);
1172 }
1173 }
1174}
1175
1176
1177/******************************************************************************/
1178/* Function: ip2_interrupt(int irq, void *dev_id, struct pt_regs * regs) */
1179/* Parameters: irq - interrupt number */
1180/* pointer to optional device ID structure */
1181/* pointer to register structure */
1182/* Returns: Nothing */
1183/* */
1184/* Description: */
1185/* */
1186/* Our task here is simply to identify each board which needs servicing. */
1187/* If we are queuing then, queue it to be serviced, and disable its irq */
1188/* mask otherwise process the board directly. */
1189/* */
1190/* We could queue by IRQ but that just complicates things on both ends */
1191/* with very little gain in performance (how many instructions does */
1192/* it take to iterate on the immediate queue). */
1193/* */
1194/* */
1195/******************************************************************************/
1196static irqreturn_t
1197ip2_interrupt(int irq, void *dev_id, struct pt_regs * regs)
1198{
1199 int i;
1200 i2eBordStrPtr pB;
1201 int handled = 0;
1202
1203 ip2trace (ITRC_NO_PORT, ITRC_INTR, 99, 1, irq );
1204
1205 /* Service just the boards on the list using this irq */
1206 for( i = 0; i < i2nBoards; ++i ) {
1207 pB = i2BoardPtrTable[i];
1208
1209// Only process those boards which match our IRQ.
1210// IRQ = 0 for polled boards, we won't poll "IRQ" boards
1211
1212 if ( pB && (pB->i2eUsingIrq == irq) ) {
1213 handled = 1;
1214#ifdef USE_IQI
1215
1216 if (NO_MAIL_HERE != ( pB->i2eStartMail = iiGetMail(pB))) {
1217// Disable his interrupt (will be enabled when serviced)
1218// This is mostly to protect from reentrancy.
1219 iiDisableMailIrq(pB);
1220
1221// Park the board on the immediate queue for processing.
1222 schedule_work(&pB->tqueue_interrupt);
1223
1224// Make sure the immediate queue is flagged to fire.
1225 }
1226#else
1227// We are using immediate servicing here. This sucks and can
1228// cause all sorts of havoc with ppp and others. The failsafe
1229// check on iiSendPendingMail could also throw a hairball.
1230 i2ServiceBoard( pB );
1231#endif /* USE_IQI */
1232 }
1233 }
1234
1235 ++irq_counter;
1236
1237 ip2trace (ITRC_NO_PORT, ITRC_INTR, ITRC_RETURN, 0 );
1238 return IRQ_RETVAL(handled);
1239}
1240
1241/******************************************************************************/
1242/* Function: ip2_poll(unsigned long arg) */
1243/* Parameters: ? */
1244/* Returns: Nothing */
1245/* */
1246/* Description: */
1247/* This function calls the library routine i2ServiceBoard for each board in */
1248/* the board table. This is used instead of the interrupt routine when polled */
1249/* mode is specified. */
1250/******************************************************************************/
1251static void
1252ip2_poll(unsigned long arg)
1253{
1254 ip2trace (ITRC_NO_PORT, ITRC_INTR, 100, 0 );
1255
1256 TimerOn = 0; // it's the truth but not checked in service
1257
1258 // Just polled boards, IRQ = 0 will hit all non-interrupt boards.
1259 // It will NOT poll boards handled by hard interrupts.
1260 // The issue of queued BH interrups is handled in ip2_interrupt().
1261 ip2_interrupt(0, NULL, NULL);
1262
1263 PollTimer.expires = POLL_TIMEOUT;
1264 add_timer( &PollTimer );
1265 TimerOn = 1;
1266
1267 ip2trace (ITRC_NO_PORT, ITRC_INTR, ITRC_RETURN, 0 );
1268}
1269
1270static void do_input(void *p)
1271{
1272 i2ChanStrPtr pCh = p;
1273 unsigned long flags;
1274
1275 ip2trace(CHANN, ITRC_INPUT, 21, 0 );
1276
1277 // Data input
1278 if ( pCh->pTTY != NULL ) {
1279 READ_LOCK_IRQSAVE(&pCh->Ibuf_spinlock,flags)
1280 if (!pCh->throttled && (pCh->Ibuf_stuff != pCh->Ibuf_strip)) {
1281 READ_UNLOCK_IRQRESTORE(&pCh->Ibuf_spinlock,flags)
1282 i2Input( pCh );
1283 } else
1284 READ_UNLOCK_IRQRESTORE(&pCh->Ibuf_spinlock,flags)
1285 } else {
1286 ip2trace(CHANN, ITRC_INPUT, 22, 0 );
1287
1288 i2InputFlush( pCh );
1289 }
1290}
1291
1292// code duplicated from n_tty (ldisc)
1293static inline void isig(int sig, struct tty_struct *tty, int flush)
1294{
1295 if (tty->pgrp > 0)
1296 kill_pg(tty->pgrp, sig, 1);
1297 if (flush || !L_NOFLSH(tty)) {
1298 if ( tty->ldisc.flush_buffer )
1299 tty->ldisc.flush_buffer(tty);
1300 i2InputFlush( tty->driver_data );
1301 }
1302}
1303
1304static void do_status(void *p)
1305{
1306 i2ChanStrPtr pCh = p;
1307 int status;
1308
1309 status = i2GetStatus( pCh, (I2_BRK|I2_PAR|I2_FRA|I2_OVR) );
1310
1311 ip2trace (CHANN, ITRC_STATUS, 21, 1, status );
1312
1313 if (pCh->pTTY && (status & (I2_BRK|I2_PAR|I2_FRA|I2_OVR)) ) {
1314 if ( (status & I2_BRK) ) {
1315 // code duplicated from n_tty (ldisc)
1316 if (I_IGNBRK(pCh->pTTY))
1317 goto skip_this;
1318 if (I_BRKINT(pCh->pTTY)) {
1319 isig(SIGINT, pCh->pTTY, 1);
1320 goto skip_this;
1321 }
1322 wake_up_interruptible(&pCh->pTTY->read_wait);
1323 }
1324#ifdef NEVER_HAPPENS_AS_SETUP_XXX
1325 // and can't work because we don't know the_char
1326 // as the_char is reported on a separate path
1327 // The intelligent board does this stuff as setup
1328 {
1329 char brkf = TTY_NORMAL;
1330 unsigned char brkc = '\0';
1331 unsigned char tmp;
1332 if ( (status & I2_BRK) ) {
1333 brkf = TTY_BREAK;
1334 brkc = '\0';
1335 }
1336 else if (status & I2_PAR) {
1337 brkf = TTY_PARITY;
1338 brkc = the_char;
1339 } else if (status & I2_FRA) {
1340 brkf = TTY_FRAME;
1341 brkc = the_char;
1342 } else if (status & I2_OVR) {
1343 brkf = TTY_OVERRUN;
1344 brkc = the_char;
1345 }
1346 tmp = pCh->pTTY->real_raw;
1347 pCh->pTTY->real_raw = 0;
1348 pCh->pTTY->ldisc.receive_buf( pCh->pTTY, &brkc, &brkf, 1 );
1349 pCh->pTTY->real_raw = tmp;
1350 }
1351#endif /* NEVER_HAPPENS_AS_SETUP_XXX */
1352 }
1353skip_this:
1354
1355 if ( status & (I2_DDCD | I2_DDSR | I2_DCTS | I2_DRI) ) {
1356 wake_up_interruptible(&pCh->delta_msr_wait);
1357
1358 if ( (pCh->flags & ASYNC_CHECK_CD) && (status & I2_DDCD) ) {
1359 if ( status & I2_DCD ) {
1360 if ( pCh->wopen ) {
1361 wake_up_interruptible ( &pCh->open_wait );
1362 }
1363 } else {
1364 if (pCh->pTTY && (!(pCh->pTTY->termios->c_cflag & CLOCAL)) ) {
1365 tty_hangup( pCh->pTTY );
1366 }
1367 }
1368 }
1369 }
1370
1371 ip2trace (CHANN, ITRC_STATUS, 26, 0 );
1372}
1373
1374/******************************************************************************/
1375/* Device Open/Close/Ioctl Entry Point Section */
1376/******************************************************************************/
1377
1378/******************************************************************************/
1379/* Function: open_sanity_check() */
1380/* Parameters: Pointer to tty structure */
1381/* Pointer to file structure */
1382/* Returns: Success or failure */
1383/* */
1384/* Description: */
1385/* Verifies the structure magic numbers and cross links. */
1386/******************************************************************************/
1387#ifdef IP2DEBUG_OPEN
1388static void
1389open_sanity_check( i2ChanStrPtr pCh, i2eBordStrPtr pBrd )
1390{
1391 if ( pBrd->i2eValid != I2E_MAGIC ) {
1392 printk(KERN_ERR "IP2: invalid board structure\n" );
1393 } else if ( pBrd != pCh->pMyBord ) {
1394 printk(KERN_ERR "IP2: board structure pointer mismatch (%p)\n",
1395 pCh->pMyBord );
1396 } else if ( pBrd->i2eChannelCnt < pCh->port_index ) {
1397 printk(KERN_ERR "IP2: bad device index (%d)\n", pCh->port_index );
1398 } else if (&((i2ChanStrPtr)pBrd->i2eChannelPtr)[pCh->port_index] != pCh) {
1399 } else {
1400 printk(KERN_INFO "IP2: all pointers check out!\n" );
1401 }
1402}
1403#endif
1404
1405
1406/******************************************************************************/
1407/* Function: ip2_open() */
1408/* Parameters: Pointer to tty structure */
1409/* Pointer to file structure */
1410/* Returns: Success or failure */
1411/* */
1412/* Description: (MANDATORY) */
1413/* A successful device open has to run a gauntlet of checks before it */
1414/* completes. After some sanity checking and pointer setup, the function */
1415/* blocks until all conditions are satisfied. It then initialises the port to */
1416/* the default characteristics and returns. */
1417/******************************************************************************/
1418static int
1419ip2_open( PTTY tty, struct file *pFile )
1420{
1421 wait_queue_t wait;
1422 int rc = 0;
1423 int do_clocal = 0;
1424 i2ChanStrPtr pCh = DevTable[tty->index];
1425
1426 ip2trace (tty->index, ITRC_OPEN, ITRC_ENTER, 0 );
1427
1428 if ( pCh == NULL ) {
1429 return -ENODEV;
1430 }
1431 /* Setup pointer links in device and tty structures */
1432 pCh->pTTY = tty;
1433 tty->driver_data = pCh;
1434
1435#ifdef IP2DEBUG_OPEN
1436 printk(KERN_DEBUG \
1437 "IP2:open(tty=%p,pFile=%p):dev=%s,ch=%d,idx=%d\n",
1438 tty, pFile, tty->name, pCh->infl.hd.i2sChannel, pCh->port_index);
1439 open_sanity_check ( pCh, pCh->pMyBord );
1440#endif
1441
1442 i2QueueCommands(PTYPE_INLINE, pCh, 100, 3, CMD_DTRUP,CMD_RTSUP,CMD_DCD_REP);
1443 pCh->dataSetOut |= (I2_DTR | I2_RTS);
1444 serviceOutgoingFifo( pCh->pMyBord );
1445
1446 /* Block here until the port is ready (per serial and istallion) */
1447 /*
1448 * 1. If the port is in the middle of closing wait for the completion
1449 * and then return the appropriate error.
1450 */
1451 init_waitqueue_entry(&wait, current);
1452 add_wait_queue(&pCh->close_wait, &wait);
1453 set_current_state( TASK_INTERRUPTIBLE );
1454
1455 if ( tty_hung_up_p(pFile) || ( pCh->flags & ASYNC_CLOSING )) {
1456 if ( pCh->flags & ASYNC_CLOSING ) {
1457 schedule();
1458 }
1459 if ( tty_hung_up_p(pFile) ) {
1460 set_current_state( TASK_RUNNING );
1461 remove_wait_queue(&pCh->close_wait, &wait);
1462 return( pCh->flags & ASYNC_HUP_NOTIFY ) ? -EAGAIN : -ERESTARTSYS;
1463 }
1464 }
1465 set_current_state( TASK_RUNNING );
1466 remove_wait_queue(&pCh->close_wait, &wait);
1467
1468 /*
1469 * 3. Handle a non-blocking open of a normal port.
1470 */
1471 if ( (pFile->f_flags & O_NONBLOCK) || (tty->flags & (1<<TTY_IO_ERROR) )) {
1472 pCh->flags |= ASYNC_NORMAL_ACTIVE;
1473 goto noblock;
1474 }
1475 /*
1476 * 4. Now loop waiting for the port to be free and carrier present
1477 * (if required).
1478 */
1479 if ( tty->termios->c_cflag & CLOCAL )
1480 do_clocal = 1;
1481
1482#ifdef IP2DEBUG_OPEN
1483 printk(KERN_DEBUG "OpenBlock: do_clocal = %d\n", do_clocal);
1484#endif
1485
1486 ++pCh->wopen;
1487
1488 init_waitqueue_entry(&wait, current);
1489 add_wait_queue(&pCh->open_wait, &wait);
1490
1491 for(;;) {
1492 i2QueueCommands(PTYPE_INLINE, pCh, 100, 2, CMD_DTRUP, CMD_RTSUP);
1493 pCh->dataSetOut |= (I2_DTR | I2_RTS);
1494 set_current_state( TASK_INTERRUPTIBLE );
1495 serviceOutgoingFifo( pCh->pMyBord );
1496 if ( tty_hung_up_p(pFile) ) {
1497 set_current_state( TASK_RUNNING );
1498 remove_wait_queue(&pCh->open_wait, &wait);
1499 return ( pCh->flags & ASYNC_HUP_NOTIFY ) ? -EBUSY : -ERESTARTSYS;
1500 }
1501 if (!(pCh->flags & ASYNC_CLOSING) &&
1502 (do_clocal || (pCh->dataSetIn & I2_DCD) )) {
1503 rc = 0;
1504 break;
1505 }
1506
1507#ifdef IP2DEBUG_OPEN
1508 printk(KERN_DEBUG "ASYNC_CLOSING = %s\n",
1509 (pCh->flags & ASYNC_CLOSING)?"True":"False");
1510 printk(KERN_DEBUG "OpenBlock: waiting for CD or signal\n");
1511#endif
1512 ip2trace (CHANN, ITRC_OPEN, 3, 2, 0,
1513 (pCh->flags & ASYNC_CLOSING) );
1514 /* check for signal */
1515 if (signal_pending(current)) {
1516 rc = (( pCh->flags & ASYNC_HUP_NOTIFY ) ? -EAGAIN : -ERESTARTSYS);
1517 break;
1518 }
1519 schedule();
1520 }
1521 set_current_state( TASK_RUNNING );
1522 remove_wait_queue(&pCh->open_wait, &wait);
1523
1524 --pCh->wopen; //why count?
1525
1526 ip2trace (CHANN, ITRC_OPEN, 4, 0 );
1527
1528 if (rc != 0 ) {
1529 return rc;
1530 }
1531 pCh->flags |= ASYNC_NORMAL_ACTIVE;
1532
1533noblock:
1534
1535 /* first open - Assign termios structure to port */
1536 if ( tty->count == 1 ) {
1537 i2QueueCommands(PTYPE_INLINE, pCh, 0, 2, CMD_CTSFL_DSAB, CMD_RTSFL_DSAB);
1538 /* Now we must send the termios settings to the loadware */
1539 set_params( pCh, NULL );
1540 }
1541
1542 /*
1543 * Now set any i2lib options. These may go away if the i2lib code ends
1544 * up rolled into the mainline.
1545 */
1546 pCh->channelOptions |= CO_NBLOCK_WRITE;
1547
1548#ifdef IP2DEBUG_OPEN
1549 printk (KERN_DEBUG "IP2: open completed\n" );
1550#endif
1551 serviceOutgoingFifo( pCh->pMyBord );
1552
1553 ip2trace (CHANN, ITRC_OPEN, ITRC_RETURN, 0 );
1554
1555 return 0;
1556}
1557
1558/******************************************************************************/
1559/* Function: ip2_close() */
1560/* Parameters: Pointer to tty structure */
1561/* Pointer to file structure */
1562/* Returns: Nothing */
1563/* */
1564/* Description: */
1565/* */
1566/* */
1567/******************************************************************************/
1568static void
1569ip2_close( PTTY tty, struct file *pFile )
1570{
1571 i2ChanStrPtr pCh = tty->driver_data;
1572
1573 if ( !pCh ) {
1574 return;
1575 }
1576
1577 ip2trace (CHANN, ITRC_CLOSE, ITRC_ENTER, 0 );
1578
1579#ifdef IP2DEBUG_OPEN
1580 printk(KERN_DEBUG "IP2:close %s:\n",tty->name);
1581#endif
1582
1583 if ( tty_hung_up_p ( pFile ) ) {
1584
1585 ip2trace (CHANN, ITRC_CLOSE, 2, 1, 2 );
1586
1587 return;
1588 }
1589 if ( tty->count > 1 ) { /* not the last close */
1590
1591 ip2trace (CHANN, ITRC_CLOSE, 2, 1, 3 );
1592
1593 return;
1594 }
1595 pCh->flags |= ASYNC_CLOSING; // last close actually
1596
1597 tty->closing = 1;
1598
1599 if (pCh->ClosingWaitTime != ASYNC_CLOSING_WAIT_NONE) {
1600 /*
1601 * Before we drop DTR, make sure the transmitter has completely drained.
1602 * This uses an timeout, after which the close
1603 * completes.
1604 */
1605 ip2_wait_until_sent(tty, pCh->ClosingWaitTime );
1606 }
1607 /*
1608 * At this point we stop accepting input. Here we flush the channel
1609 * input buffer which will allow the board to send up more data. Any
1610 * additional input is tossed at interrupt/poll time.
1611 */
1612 i2InputFlush( pCh );
1613
1614 /* disable DSS reporting */
1615 i2QueueCommands(PTYPE_INLINE, pCh, 100, 4,
1616 CMD_DCD_NREP, CMD_CTS_NREP, CMD_DSR_NREP, CMD_RI_NREP);
1617 if ( !tty || (tty->termios->c_cflag & HUPCL) ) {
1618 i2QueueCommands(PTYPE_INLINE, pCh, 100, 2, CMD_RTSDN, CMD_DTRDN);
1619 pCh->dataSetOut &= ~(I2_DTR | I2_RTS);
1620 i2QueueCommands( PTYPE_INLINE, pCh, 100, 1, CMD_PAUSE(25));
1621 }
1622
1623 serviceOutgoingFifo ( pCh->pMyBord );
1624
1625 if ( tty->driver->flush_buffer )
1626 tty->driver->flush_buffer(tty);
1627 if ( tty->ldisc.flush_buffer )
1628 tty->ldisc.flush_buffer(tty);
1629 tty->closing = 0;
1630
1631 pCh->pTTY = NULL;
1632
1633 if (pCh->wopen) {
1634 if (pCh->ClosingDelay) {
1635 msleep_interruptible(jiffies_to_msecs(pCh->ClosingDelay));
1636 }
1637 wake_up_interruptible(&pCh->open_wait);
1638 }
1639
1640 pCh->flags &=~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
1641 wake_up_interruptible(&pCh->close_wait);
1642
1643#ifdef IP2DEBUG_OPEN
1644 DBG_CNT("ip2_close: after wakeups--");
1645#endif
1646
1647
1648 ip2trace (CHANN, ITRC_CLOSE, ITRC_RETURN, 1, 1 );
1649
1650 return;
1651}
1652
1653/******************************************************************************/
1654/* Function: ip2_hangup() */
1655/* Parameters: Pointer to tty structure */
1656/* Returns: Nothing */
1657/* */
1658/* Description: */
1659/* */
1660/* */
1661/******************************************************************************/
1662static void
1663ip2_hangup ( PTTY tty )
1664{
1665 i2ChanStrPtr pCh = tty->driver_data;
1666
1667 if( !pCh ) {
1668 return;
1669 }
1670
1671 ip2trace (CHANN, ITRC_HANGUP, ITRC_ENTER, 0 );
1672
1673 ip2_flush_buffer(tty);
1674
1675 /* disable DSS reporting */
1676
1677 i2QueueCommands(PTYPE_BYPASS, pCh, 0, 1, CMD_DCD_NREP);
1678 i2QueueCommands(PTYPE_INLINE, pCh, 0, 2, CMD_CTSFL_DSAB, CMD_RTSFL_DSAB);
1679 if ( (tty->termios->c_cflag & HUPCL) ) {
1680 i2QueueCommands(PTYPE_BYPASS, pCh, 0, 2, CMD_RTSDN, CMD_DTRDN);
1681 pCh->dataSetOut &= ~(I2_DTR | I2_RTS);
1682 i2QueueCommands( PTYPE_INLINE, pCh, 100, 1, CMD_PAUSE(25));
1683 }
1684 i2QueueCommands(PTYPE_INLINE, pCh, 1, 3,
1685 CMD_CTS_NREP, CMD_DSR_NREP, CMD_RI_NREP);
1686 serviceOutgoingFifo ( pCh->pMyBord );
1687
1688 wake_up_interruptible ( &pCh->delta_msr_wait );
1689
1690 pCh->flags &= ~ASYNC_NORMAL_ACTIVE;
1691 pCh->pTTY = NULL;
1692 wake_up_interruptible ( &pCh->open_wait );
1693
1694 ip2trace (CHANN, ITRC_HANGUP, ITRC_RETURN, 0 );
1695}
1696
1697/******************************************************************************/
1698/******************************************************************************/
1699/* Device Output Section */
1700/******************************************************************************/
1701/******************************************************************************/
1702
1703/******************************************************************************/
1704/* Function: ip2_write() */
1705/* Parameters: Pointer to tty structure */
1706/* Flag denoting data is in user (1) or kernel (0) space */
1707/* Pointer to data */
1708/* Number of bytes to write */
1709/* Returns: Number of bytes actually written */
1710/* */
1711/* Description: (MANDATORY) */
1712/* */
1713/* */
1714/******************************************************************************/
1715static int
Alan Coxd9e39532006-01-09 20:54:20 -0800[diff] [blame]1716ip2_write( PTTY tty, const unsigned char *pData, int count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1717{
1718 i2ChanStrPtr pCh = tty->driver_data;
1719 int bytesSent = 0;
1720 unsigned long flags;
1721
1722 ip2trace (CHANN, ITRC_WRITE, ITRC_ENTER, 2, count, -1 );
1723
1724 /* Flush out any buffered data left over from ip2_putchar() calls. */
1725 ip2_flush_chars( tty );
1726
1727 /* This is the actual move bit. Make sure it does what we need!!!!! */
1728 WRITE_LOCK_IRQSAVE(&pCh->Pbuf_spinlock,flags);
Alan Coxd9e39532006-01-09 20:54:20 -0800[diff] [blame]1729 bytesSent = i2Output( pCh, pData, count, 0 );
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1730 WRITE_UNLOCK_IRQRESTORE(&pCh->Pbuf_spinlock,flags);
1731
1732 ip2trace (CHANN, ITRC_WRITE, ITRC_RETURN, 1, bytesSent );
1733
1734 return bytesSent > 0 ? bytesSent : 0;
1735}
1736
1737/******************************************************************************/
1738/* Function: ip2_putchar() */
1739/* Parameters: Pointer to tty structure */
1740/* Character to write */
1741/* Returns: Nothing */
1742/* */
1743/* Description: */
1744/* */
1745/* */
1746/******************************************************************************/
1747static void
1748ip2_putchar( PTTY tty, unsigned char ch )
1749{
1750 i2ChanStrPtr pCh = tty->driver_data;
1751 unsigned long flags;
1752
1753// ip2trace (CHANN, ITRC_PUTC, ITRC_ENTER, 1, ch );
1754
1755 WRITE_LOCK_IRQSAVE(&pCh->Pbuf_spinlock,flags);
1756 pCh->Pbuf[pCh->Pbuf_stuff++] = ch;
1757 if ( pCh->Pbuf_stuff == sizeof pCh->Pbuf ) {
1758 WRITE_UNLOCK_IRQRESTORE(&pCh->Pbuf_spinlock,flags);
1759 ip2_flush_chars( tty );
1760 } else
1761 WRITE_UNLOCK_IRQRESTORE(&pCh->Pbuf_spinlock,flags);
1762
1763// ip2trace (CHANN, ITRC_PUTC, ITRC_RETURN, 1, ch );
1764}
1765
1766/******************************************************************************/
1767/* Function: ip2_flush_chars() */
1768/* Parameters: Pointer to tty structure */
1769/* Returns: Nothing */
1770/* */
1771/* Description: */
1772/* */
1773/******************************************************************************/
1774static void
1775ip2_flush_chars( PTTY tty )
1776{
1777 int strip;
1778 i2ChanStrPtr pCh = tty->driver_data;
1779 unsigned long flags;
1780
1781 WRITE_LOCK_IRQSAVE(&pCh->Pbuf_spinlock,flags);
1782 if ( pCh->Pbuf_stuff ) {
1783
1784// ip2trace (CHANN, ITRC_PUTC, 10, 1, strip );
1785
1786 //
1787 // We may need to restart i2Output if it does not fullfill this request
1788 //
1789 strip = i2Output( pCh, pCh->Pbuf, pCh->Pbuf_stuff, 0 );
1790 if ( strip != pCh->Pbuf_stuff ) {
1791 memmove( pCh->Pbuf, &pCh->Pbuf[strip], pCh->Pbuf_stuff - strip );
1792 }
1793 pCh->Pbuf_stuff -= strip;
1794 }
1795 WRITE_UNLOCK_IRQRESTORE(&pCh->Pbuf_spinlock,flags);
1796}
1797
1798/******************************************************************************/
1799/* Function: ip2_write_room() */
1800/* Parameters: Pointer to tty structure */
1801/* Returns: Number of bytes that the driver can accept */
1802/* */
1803/* Description: */
1804/* */
1805/******************************************************************************/
1806static int
1807ip2_write_room ( PTTY tty )
1808{
1809 int bytesFree;
1810 i2ChanStrPtr pCh = tty->driver_data;
1811 unsigned long flags;
1812
1813 READ_LOCK_IRQSAVE(&pCh->Pbuf_spinlock,flags);
1814 bytesFree = i2OutputFree( pCh ) - pCh->Pbuf_stuff;
1815 READ_UNLOCK_IRQRESTORE(&pCh->Pbuf_spinlock,flags);
1816
1817 ip2trace (CHANN, ITRC_WRITE, 11, 1, bytesFree );
1818
1819 return ((bytesFree > 0) ? bytesFree : 0);
1820}
1821
1822/******************************************************************************/
1823/* Function: ip2_chars_in_buf() */
1824/* Parameters: Pointer to tty structure */
1825/* Returns: Number of bytes queued for transmission */
1826/* */
1827/* Description: */
1828/* */
1829/* */
1830/******************************************************************************/
1831static int
1832ip2_chars_in_buf ( PTTY tty )
1833{
1834 i2ChanStrPtr pCh = tty->driver_data;
1835 int rc;
1836 unsigned long flags;
1837
1838 ip2trace (CHANN, ITRC_WRITE, 12, 1, pCh->Obuf_char_count + pCh->Pbuf_stuff );
1839
1840#ifdef IP2DEBUG_WRITE
1841 printk (KERN_DEBUG "IP2: chars in buffer = %d (%d,%d)\n",
1842 pCh->Obuf_char_count + pCh->Pbuf_stuff,
1843 pCh->Obuf_char_count, pCh->Pbuf_stuff );
1844#endif
1845 READ_LOCK_IRQSAVE(&pCh->Obuf_spinlock,flags);
1846 rc = pCh->Obuf_char_count;
1847 READ_UNLOCK_IRQRESTORE(&pCh->Obuf_spinlock,flags);
1848 READ_LOCK_IRQSAVE(&pCh->Pbuf_spinlock,flags);
1849 rc += pCh->Pbuf_stuff;
1850 READ_UNLOCK_IRQRESTORE(&pCh->Pbuf_spinlock,flags);
1851 return rc;
1852}
1853
1854/******************************************************************************/
1855/* Function: ip2_flush_buffer() */
1856/* Parameters: Pointer to tty structure */
1857/* Returns: Nothing */
1858/* */
1859/* Description: */
1860/* */
1861/* */
1862/******************************************************************************/
1863static void
1864ip2_flush_buffer( PTTY tty )
1865{
1866 i2ChanStrPtr pCh = tty->driver_data;
1867 unsigned long flags;
1868
1869 ip2trace (CHANN, ITRC_FLUSH, ITRC_ENTER, 0 );
1870
1871#ifdef IP2DEBUG_WRITE
1872 printk (KERN_DEBUG "IP2: flush buffer\n" );
1873#endif
1874 WRITE_LOCK_IRQSAVE(&pCh->Pbuf_spinlock,flags);
1875 pCh->Pbuf_stuff = 0;
1876 WRITE_UNLOCK_IRQRESTORE(&pCh->Pbuf_spinlock,flags);
1877 i2FlushOutput( pCh );
1878 ip2_owake(tty);
1879
1880 ip2trace (CHANN, ITRC_FLUSH, ITRC_RETURN, 0 );
1881
1882}
1883
1884/******************************************************************************/
1885/* Function: ip2_wait_until_sent() */
1886/* Parameters: Pointer to tty structure */
1887/* Timeout for wait. */
1888/* Returns: Nothing */
1889/* */
1890/* Description: */
1891/* This function is used in place of the normal tty_wait_until_sent, which */
1892/* only waits for the driver buffers to be empty (or rather, those buffers */
1893/* reported by chars_in_buffer) which doesn't work for IP2 due to the */
1894/* indeterminate number of bytes buffered on the board. */
1895/******************************************************************************/
1896static void
1897ip2_wait_until_sent ( PTTY tty, int timeout )
1898{
1899 int i = jiffies;
1900 i2ChanStrPtr pCh = tty->driver_data;
1901
1902 tty_wait_until_sent(tty, timeout );
1903 if ( (i = timeout - (jiffies -i)) > 0)
1904 i2DrainOutput( pCh, i );
1905}
1906
1907/******************************************************************************/
1908/******************************************************************************/
1909/* Device Input Section */
1910/******************************************************************************/
1911/******************************************************************************/
1912
1913/******************************************************************************/
1914/* Function: ip2_throttle() */
1915/* Parameters: Pointer to tty structure */
1916/* Returns: Nothing */
1917/* */
1918/* Description: */
1919/* */
1920/* */
1921/******************************************************************************/
1922static void
1923ip2_throttle ( PTTY tty )
1924{
1925 i2ChanStrPtr pCh = tty->driver_data;
1926
1927#ifdef IP2DEBUG_READ
1928 printk (KERN_DEBUG "IP2: throttle\n" );
1929#endif
1930 /*
1931 * Signal the poll/interrupt handlers not to forward incoming data to
1932 * the line discipline. This will cause the buffers to fill up in the
1933 * library and thus cause the library routines to send the flow control
1934 * stuff.
1935 */
1936 pCh->throttled = 1;
1937}
1938
1939/******************************************************************************/
1940/* Function: ip2_unthrottle() */
1941/* Parameters: Pointer to tty structure */
1942/* Returns: Nothing */
1943/* */
1944/* Description: */
1945/* */
1946/* */
1947/******************************************************************************/
1948static void
1949ip2_unthrottle ( PTTY tty )
1950{
1951 i2ChanStrPtr pCh = tty->driver_data;
1952 unsigned long flags;
1953
1954#ifdef IP2DEBUG_READ
1955 printk (KERN_DEBUG "IP2: unthrottle\n" );
1956#endif
1957
1958 /* Pass incoming data up to the line discipline again. */
1959 pCh->throttled = 0;
1960 i2QueueCommands(PTYPE_BYPASS, pCh, 0, 1, CMD_RESUME);
1961 serviceOutgoingFifo( pCh->pMyBord );
1962 READ_LOCK_IRQSAVE(&pCh->Ibuf_spinlock,flags)
1963 if ( pCh->Ibuf_stuff != pCh->Ibuf_strip ) {
1964 READ_UNLOCK_IRQRESTORE(&pCh->Ibuf_spinlock,flags)
1965#ifdef IP2DEBUG_READ
1966 printk (KERN_DEBUG "i2Input called from unthrottle\n" );
1967#endif
1968 i2Input( pCh );
1969 } else
1970 READ_UNLOCK_IRQRESTORE(&pCh->Ibuf_spinlock,flags)
1971}
1972
1973static void
1974ip2_start ( PTTY tty )
1975{
1976 i2ChanStrPtr pCh = DevTable[tty->index];
1977
1978 i2QueueCommands(PTYPE_BYPASS, pCh, 0, 1, CMD_RESUME);
1979 i2QueueCommands(PTYPE_BYPASS, pCh, 100, 1, CMD_UNSUSPEND);
1980 i2QueueCommands(PTYPE_BYPASS, pCh, 100, 1, CMD_RESUME);
1981#ifdef IP2DEBUG_WRITE
1982 printk (KERN_DEBUG "IP2: start tx\n" );
1983#endif
1984}
1985
1986static void
1987ip2_stop ( PTTY tty )
1988{
1989 i2ChanStrPtr pCh = DevTable[tty->index];
1990
1991 i2QueueCommands(PTYPE_BYPASS, pCh, 100, 1, CMD_SUSPEND);
1992#ifdef IP2DEBUG_WRITE
1993 printk (KERN_DEBUG "IP2: stop tx\n" );
1994#endif
1995}
1996
1997/******************************************************************************/
1998/* Device Ioctl Section */
1999/******************************************************************************/
2000
2001static int ip2_tiocmget(struct tty_struct *tty, struct file *file)
2002{
2003 i2ChanStrPtr pCh = DevTable[tty->index];
Alan Coxd9e39532006-01-09 20:54:20 -0800[diff] [blame]2004#ifdef ENABLE_DSSNOW
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2005 wait_queue_t wait;
Alan Coxd9e39532006-01-09 20:54:20 -0800[diff] [blame]2006#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2007
2008 if (pCh == NULL)
2009 return -ENODEV;
2010
2011/*
2012 FIXME - the following code is causing a NULL pointer dereference in
2013 2.3.51 in an interrupt handler. It's suppose to prompt the board
2014 to return the DSS signal status immediately. Why doesn't it do
2015 the same thing in 2.2.14?
2016*/
2017
2018/* This thing is still busted in the 1.2.12 driver on 2.4.x
2019 and even hoses the serial console so the oops can be trapped.
2020 /\/\|=mhw=|\/\/ */
2021
2022#ifdef ENABLE_DSSNOW
2023 i2QueueCommands(PTYPE_BYPASS, pCh, 100, 1, CMD_DSS_NOW);
2024
2025 init_waitqueue_entry(&wait, current);
2026 add_wait_queue(&pCh->dss_now_wait, &wait);
2027 set_current_state( TASK_INTERRUPTIBLE );
2028
2029 serviceOutgoingFifo( pCh->pMyBord );
2030
2031 schedule();
2032
2033 set_current_state( TASK_RUNNING );
2034 remove_wait_queue(&pCh->dss_now_wait, &wait);
2035
2036 if (signal_pending(current)) {
2037 return -EINTR;
2038 }
2039#endif
2040 return ((pCh->dataSetOut & I2_RTS) ? TIOCM_RTS : 0)
2041 | ((pCh->dataSetOut & I2_DTR) ? TIOCM_DTR : 0)
2042 | ((pCh->dataSetIn & I2_DCD) ? TIOCM_CAR : 0)
2043 | ((pCh->dataSetIn & I2_RI) ? TIOCM_RNG : 0)
2044 | ((pCh->dataSetIn & I2_DSR) ? TIOCM_DSR : 0)
2045 | ((pCh->dataSetIn & I2_CTS) ? TIOCM_CTS : 0);
2046}
2047
2048static int ip2_tiocmset(struct tty_struct *tty, struct file *file,
2049 unsigned int set, unsigned int clear)
2050{
2051 i2ChanStrPtr pCh = DevTable[tty->index];
2052
2053 if (pCh == NULL)
2054 return -ENODEV;
2055
2056 if (set & TIOCM_RTS) {
2057 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_RTSUP);
2058 pCh->dataSetOut |= I2_RTS;
2059 }
2060 if (set & TIOCM_DTR) {
2061 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_DTRUP);
2062 pCh->dataSetOut |= I2_DTR;
2063 }
2064
2065 if (clear & TIOCM_RTS) {
2066 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_RTSDN);
2067 pCh->dataSetOut &= ~I2_RTS;
2068 }
2069 if (clear & TIOCM_DTR) {
2070 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_DTRDN);
2071 pCh->dataSetOut &= ~I2_DTR;
2072 }
2073 serviceOutgoingFifo( pCh->pMyBord );
2074 return 0;
2075}
2076
2077/******************************************************************************/
2078/* Function: ip2_ioctl() */
2079/* Parameters: Pointer to tty structure */
2080/* Pointer to file structure */
2081/* Command */
2082/* Argument */
2083/* Returns: Success or failure */
2084/* */
2085/* Description: */
2086/* */
2087/* */
2088/******************************************************************************/
2089static int
2090ip2_ioctl ( PTTY tty, struct file *pFile, UINT cmd, ULONG arg )
2091{
2092 wait_queue_t wait;
2093 i2ChanStrPtr pCh = DevTable[tty->index];
Alan Coxd9e39532006-01-09 20:54:20 -0800[diff] [blame]2094 i2eBordStrPtr pB;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2095 struct async_icount cprev, cnow; /* kernel counter temps */
2096 struct serial_icounter_struct __user *p_cuser;
2097 int rc = 0;
2098 unsigned long flags;
2099 void __user *argp = (void __user *)arg;
2100
Alan Coxd9e39532006-01-09 20:54:20 -0800[diff] [blame]2101 if ( pCh == NULL )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2102 return -ENODEV;
Alan Coxd9e39532006-01-09 20:54:20 -0800[diff] [blame]2103
2104 pB = pCh->pMyBord;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2105
2106 ip2trace (CHANN, ITRC_IOCTL, ITRC_ENTER, 2, cmd, arg );
2107
2108#ifdef IP2DEBUG_IOCTL
2109 printk(KERN_DEBUG "IP2: ioctl cmd (%x), arg (%lx)\n", cmd, arg );
2110#endif
2111
2112 switch(cmd) {
2113 case TIOCGSERIAL:
2114
2115 ip2trace (CHANN, ITRC_IOCTL, 2, 1, rc );
2116
2117 rc = get_serial_info(pCh, argp);
2118 if (rc)
2119 return rc;
2120 break;
2121
2122 case TIOCSSERIAL:
2123
2124 ip2trace (CHANN, ITRC_IOCTL, 3, 1, rc );
2125
2126 rc = set_serial_info(pCh, argp);
2127 if (rc)
2128 return rc;
2129 break;
2130
2131 case TCXONC:
2132 rc = tty_check_change(tty);
2133 if (rc)
2134 return rc;
2135 switch (arg) {
2136 case TCOOFF:
2137 //return -ENOIOCTLCMD;
2138 break;
2139 case TCOON:
2140 //return -ENOIOCTLCMD;
2141 break;
2142 case TCIOFF:
2143 if (STOP_CHAR(tty) != __DISABLED_CHAR) {
2144 i2QueueCommands( PTYPE_BYPASS, pCh, 100, 1,
2145 CMD_XMIT_NOW(STOP_CHAR(tty)));
2146 }
2147 break;
2148 case TCION:
2149 if (START_CHAR(tty) != __DISABLED_CHAR) {
2150 i2QueueCommands( PTYPE_BYPASS, pCh, 100, 1,
2151 CMD_XMIT_NOW(START_CHAR(tty)));
2152 }
2153 break;
2154 default:
2155 return -EINVAL;
2156 }
2157 return 0;
2158
2159 case TCSBRK: /* SVID version: non-zero arg --> no break */
2160 rc = tty_check_change(tty);
2161
2162 ip2trace (CHANN, ITRC_IOCTL, 4, 1, rc );
2163
2164 if (!rc) {
2165 ip2_wait_until_sent(tty,0);
2166 if (!arg) {
2167 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_SEND_BRK(250));
2168 serviceOutgoingFifo( pCh->pMyBord );
2169 }
2170 }
2171 break;
2172
2173 case TCSBRKP: /* support for POSIX tcsendbreak() */
2174 rc = tty_check_change(tty);
2175
2176 ip2trace (CHANN, ITRC_IOCTL, 5, 1, rc );
2177
2178 if (!rc) {
2179 ip2_wait_until_sent(tty,0);
2180 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1,
2181 CMD_SEND_BRK(arg ? arg*100 : 250));
2182 serviceOutgoingFifo ( pCh->pMyBord );
2183 }
2184 break;
2185
2186 case TIOCGSOFTCAR:
2187
2188 ip2trace (CHANN, ITRC_IOCTL, 6, 1, rc );
2189
2190 rc = put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
2191 if (rc)
2192 return rc;
2193 break;
2194
2195 case TIOCSSOFTCAR:
2196
2197 ip2trace (CHANN, ITRC_IOCTL, 7, 1, rc );
2198
2199 rc = get_user(arg,(unsigned long __user *) argp);
2200 if (rc)
2201 return rc;
2202 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL)
2203 | (arg ? CLOCAL : 0));
2204
2205 break;
2206
2207 /*
2208 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change - mask
2209 * passed in arg for lines of interest (use |'ed TIOCM_RNG/DSR/CD/CTS
2210 * for masking). Caller should use TIOCGICOUNT to see which one it was
2211 */
2212 case TIOCMIWAIT:
Alan Coxd9e39532006-01-09 20:54:20 -0800[diff] [blame]2213 WRITE_LOCK_IRQSAVE(&pB->read_fifo_spinlock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2214 cprev = pCh->icount; /* note the counters on entry */
Alan Coxd9e39532006-01-09 20:54:20 -0800[diff] [blame]2215 WRITE_UNLOCK_IRQRESTORE(&pB->read_fifo_spinlock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2216 i2QueueCommands(PTYPE_BYPASS, pCh, 100, 4,
2217 CMD_DCD_REP, CMD_CTS_REP, CMD_DSR_REP, CMD_RI_REP);
2218 init_waitqueue_entry(&wait, current);
2219 add_wait_queue(&pCh->delta_msr_wait, &wait);
2220 set_current_state( TASK_INTERRUPTIBLE );
2221
2222 serviceOutgoingFifo( pCh->pMyBord );
2223 for(;;) {
2224 ip2trace (CHANN, ITRC_IOCTL, 10, 0 );
2225
2226 schedule();
2227
2228 ip2trace (CHANN, ITRC_IOCTL, 11, 0 );
2229
2230 /* see if a signal did it */
2231 if (signal_pending(current)) {
2232 rc = -ERESTARTSYS;
2233 break;
2234 }
Alan Coxd9e39532006-01-09 20:54:20 -0800[diff] [blame]2235 WRITE_LOCK_IRQSAVE(&pB->read_fifo_spinlock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2236 cnow = pCh->icount; /* atomic copy */
Alan Coxd9e39532006-01-09 20:54:20 -0800[diff] [blame]2237 WRITE_UNLOCK_IRQRESTORE(&pB->read_fifo_spinlock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2238 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2239 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
2240 rc = -EIO; /* no change => rc */
2241 break;
2242 }
2243 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2244 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2245 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2246 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
2247 rc = 0;
2248 break;
2249 }
2250 cprev = cnow;
2251 }
2252 set_current_state( TASK_RUNNING );
2253 remove_wait_queue(&pCh->delta_msr_wait, &wait);
2254
2255 i2QueueCommands(PTYPE_BYPASS, pCh, 100, 3,
2256 CMD_CTS_NREP, CMD_DSR_NREP, CMD_RI_NREP);
2257 if ( ! (pCh->flags & ASYNC_CHECK_CD)) {
2258 i2QueueCommands(PTYPE_BYPASS, pCh, 100, 1, CMD_DCD_NREP);
2259 }
2260 serviceOutgoingFifo( pCh->pMyBord );
2261 return rc;
2262 break;
2263
2264 /*
2265 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
2266 * Return: write counters to the user passed counter struct
2267 * NB: both 1->0 and 0->1 transitions are counted except for RI where
2268 * only 0->1 is counted. The controller is quite capable of counting
2269 * both, but this done to preserve compatibility with the standard
2270 * serial driver.
2271 */
2272 case TIOCGICOUNT:
2273 ip2trace (CHANN, ITRC_IOCTL, 11, 1, rc );
2274
Alan Coxd9e39532006-01-09 20:54:20 -0800[diff] [blame]2275 WRITE_LOCK_IRQSAVE(&pB->read_fifo_spinlock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2276 cnow = pCh->icount;
Alan Coxd9e39532006-01-09 20:54:20 -0800[diff] [blame]2277 WRITE_UNLOCK_IRQRESTORE(&pB->read_fifo_spinlock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2278 p_cuser = argp;
2279 rc = put_user(cnow.cts, &p_cuser->cts);
2280 rc = put_user(cnow.dsr, &p_cuser->dsr);
2281 rc = put_user(cnow.rng, &p_cuser->rng);
2282 rc = put_user(cnow.dcd, &p_cuser->dcd);
2283 rc = put_user(cnow.rx, &p_cuser->rx);
2284 rc = put_user(cnow.tx, &p_cuser->tx);
2285 rc = put_user(cnow.frame, &p_cuser->frame);
2286 rc = put_user(cnow.overrun, &p_cuser->overrun);
2287 rc = put_user(cnow.parity, &p_cuser->parity);
2288 rc = put_user(cnow.brk, &p_cuser->brk);
2289 rc = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
2290 break;
2291
2292 /*
2293 * The rest are not supported by this driver. By returning -ENOIOCTLCMD they
2294 * will be passed to the line discipline for it to handle.
2295 */
2296 case TIOCSERCONFIG:
2297 case TIOCSERGWILD:
2298 case TIOCSERGETLSR:
2299 case TIOCSERSWILD:
2300 case TIOCSERGSTRUCT:
2301 case TIOCSERGETMULTI:
2302 case TIOCSERSETMULTI:
2303
2304 default:
2305 ip2trace (CHANN, ITRC_IOCTL, 12, 0 );
2306
2307 rc = -ENOIOCTLCMD;
2308 break;
2309 }
2310
2311 ip2trace (CHANN, ITRC_IOCTL, ITRC_RETURN, 0 );
2312
2313 return rc;
2314}
2315
2316/******************************************************************************/
2317/* Function: GetSerialInfo() */
2318/* Parameters: Pointer to channel structure */
2319/* Pointer to old termios structure */
2320/* Returns: Nothing */
2321/* */
2322/* Description: */
2323/* This is to support the setserial command, and requires processing of the */
2324/* standard Linux serial structure. */
2325/******************************************************************************/
2326static int
2327get_serial_info ( i2ChanStrPtr pCh, struct serial_struct __user *retinfo )
2328{
2329 struct serial_struct tmp;
2330
2331 memset ( &tmp, 0, sizeof(tmp) );
2332 tmp.type = pCh->pMyBord->channelBtypes.bid_value[(pCh->port_index & (IP2_PORTS_PER_BOARD-1))/16];
2333 if (BID_HAS_654(tmp.type)) {
2334 tmp.type = PORT_16650;
2335 } else {
2336 tmp.type = PORT_CIRRUS;
2337 }
2338 tmp.line = pCh->port_index;
2339 tmp.port = pCh->pMyBord->i2eBase;
2340 tmp.irq = ip2config.irq[pCh->port_index/64];
2341 tmp.flags = pCh->flags;
2342 tmp.baud_base = pCh->BaudBase;
2343 tmp.close_delay = pCh->ClosingDelay;
2344 tmp.closing_wait = pCh->ClosingWaitTime;
2345 tmp.custom_divisor = pCh->BaudDivisor;
2346 return copy_to_user(retinfo,&tmp,sizeof(*retinfo));
2347}
2348
2349/******************************************************************************/
2350/* Function: SetSerialInfo() */
2351/* Parameters: Pointer to channel structure */
2352/* Pointer to old termios structure */
2353/* Returns: Nothing */
2354/* */
2355/* Description: */
2356/* This function provides support for setserial, which uses the TIOCSSERIAL */
2357/* ioctl. Not all setserial parameters are relevant. If the user attempts to */
2358/* change the IRQ, address or type of the port the ioctl fails. */
2359/******************************************************************************/
2360static int
2361set_serial_info( i2ChanStrPtr pCh, struct serial_struct __user *new_info )
2362{
2363 struct serial_struct ns;
2364 int old_flags, old_baud_divisor;
2365
2366 if (copy_from_user(&ns, new_info, sizeof (ns)))
2367 return -EFAULT;
2368
2369 /*
2370 * We don't allow setserial to change IRQ, board address, type or baud
2371 * base. Also line nunber as such is meaningless but we use it for our
2372 * array index so it is fixed also.
2373 */
2374 if ( (ns.irq != ip2config.irq[pCh->port_index])
2375 || ((int) ns.port != ((int) (pCh->pMyBord->i2eBase)))
2376 || (ns.baud_base != pCh->BaudBase)
2377 || (ns.line != pCh->port_index) ) {
2378 return -EINVAL;
2379 }
2380
2381 old_flags = pCh->flags;
2382 old_baud_divisor = pCh->BaudDivisor;
2383
2384 if ( !capable(CAP_SYS_ADMIN) ) {
2385 if ( ( ns.close_delay != pCh->ClosingDelay ) ||
2386 ( (ns.flags & ~ASYNC_USR_MASK) !=
2387 (pCh->flags & ~ASYNC_USR_MASK) ) ) {
2388 return -EPERM;
2389 }
2390
2391 pCh->flags = (pCh->flags & ~ASYNC_USR_MASK) |
2392 (ns.flags & ASYNC_USR_MASK);
2393 pCh->BaudDivisor = ns.custom_divisor;
2394 } else {
2395 pCh->flags = (pCh->flags & ~ASYNC_FLAGS) |
2396 (ns.flags & ASYNC_FLAGS);
2397 pCh->BaudDivisor = ns.custom_divisor;
2398 pCh->ClosingDelay = ns.close_delay * HZ/100;
2399 pCh->ClosingWaitTime = ns.closing_wait * HZ/100;
2400 }
2401
2402 if ( ( (old_flags & ASYNC_SPD_MASK) != (pCh->flags & ASYNC_SPD_MASK) )
2403 || (old_baud_divisor != pCh->BaudDivisor) ) {
2404 // Invalidate speed and reset parameters
2405 set_params( pCh, NULL );
2406 }
2407
2408 return 0;
2409}
2410
2411/******************************************************************************/
2412/* Function: ip2_set_termios() */
2413/* Parameters: Pointer to tty structure */
2414/* Pointer to old termios structure */
2415/* Returns: Nothing */
2416/* */
2417/* Description: */
2418/* */
2419/* */
2420/******************************************************************************/
2421static void
2422ip2_set_termios( PTTY tty, struct termios *old_termios )
2423{
2424 i2ChanStrPtr pCh = (i2ChanStrPtr)tty->driver_data;
2425
2426#ifdef IP2DEBUG_IOCTL
2427 printk (KERN_DEBUG "IP2: set termios %p\n", old_termios );
2428#endif
2429
2430 set_params( pCh, old_termios );
2431}
2432
2433/******************************************************************************/
2434/* Function: ip2_set_line_discipline() */
2435/* Parameters: Pointer to tty structure */
2436/* Returns: Nothing */
2437/* */
2438/* Description: Does nothing */
2439/* */
2440/* */
2441/******************************************************************************/
2442static void
2443ip2_set_line_discipline ( PTTY tty )
2444{
2445#ifdef IP2DEBUG_IOCTL
2446 printk (KERN_DEBUG "IP2: set line discipline\n" );
2447#endif
2448
2449 ip2trace (((i2ChanStrPtr)tty->driver_data)->port_index, ITRC_IOCTL, 16, 0 );
2450
2451}
2452
2453/******************************************************************************/
2454/* Function: SetLine Characteristics() */
2455/* Parameters: Pointer to channel structure */
2456/* Returns: Nothing */
2457/* */
2458/* Description: */
2459/* This routine is called to update the channel structure with the new line */
2460/* characteristics, and send the appropriate commands to the board when they */
2461/* change. */
2462/******************************************************************************/
2463static void
2464set_params( i2ChanStrPtr pCh, struct termios *o_tios )
2465{
2466 tcflag_t cflag, iflag, lflag;
2467 char stop_char, start_char;
2468 struct termios dummy;
2469
2470 lflag = pCh->pTTY->termios->c_lflag;
2471 cflag = pCh->pTTY->termios->c_cflag;
2472 iflag = pCh->pTTY->termios->c_iflag;
2473
2474 if (o_tios == NULL) {
2475 dummy.c_lflag = ~lflag;
2476 dummy.c_cflag = ~cflag;
2477 dummy.c_iflag = ~iflag;
2478 o_tios = &dummy;
2479 }
2480
2481 {
2482 switch ( cflag & CBAUD ) {
2483 case B0:
2484 i2QueueCommands( PTYPE_BYPASS, pCh, 100, 2, CMD_RTSDN, CMD_DTRDN);
2485 pCh->dataSetOut &= ~(I2_DTR | I2_RTS);
2486 i2QueueCommands( PTYPE_INLINE, pCh, 100, 1, CMD_PAUSE(25));
2487 pCh->pTTY->termios->c_cflag |= (CBAUD & o_tios->c_cflag);
2488 goto service_it;
2489 break;
2490 case B38400:
2491 /*
2492 * This is the speed that is overloaded with all the other high
2493 * speeds, depending upon the flag settings.
2494 */
2495 if ( ( pCh->flags & ASYNC_SPD_MASK ) == ASYNC_SPD_HI ) {
2496 pCh->speed = CBR_57600;
2497 } else if ( (pCh->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI ) {
2498 pCh->speed = CBR_115200;
2499 } else if ( (pCh->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST ) {
2500 pCh->speed = CBR_C1;
2501 } else {
2502 pCh->speed = CBR_38400;
2503 }
2504 break;
2505 case B50: pCh->speed = CBR_50; break;
2506 case B75: pCh->speed = CBR_75; break;
2507 case B110: pCh->speed = CBR_110; break;
2508 case B134: pCh->speed = CBR_134; break;
2509 case B150: pCh->speed = CBR_150; break;
2510 case B200: pCh->speed = CBR_200; break;
2511 case B300: pCh->speed = CBR_300; break;
2512 case B600: pCh->speed = CBR_600; break;
2513 case B1200: pCh->speed = CBR_1200; break;
2514 case B1800: pCh->speed = CBR_1800; break;
2515 case B2400: pCh->speed = CBR_2400; break;
2516 case B4800: pCh->speed = CBR_4800; break;
2517 case B9600: pCh->speed = CBR_9600; break;
2518 case B19200: pCh->speed = CBR_19200; break;
2519 case B57600: pCh->speed = CBR_57600; break;
2520 case B115200: pCh->speed = CBR_115200; break;
2521 case B153600: pCh->speed = CBR_153600; break;
2522 case B230400: pCh->speed = CBR_230400; break;
2523 case B307200: pCh->speed = CBR_307200; break;
2524 case B460800: pCh->speed = CBR_460800; break;
2525 case B921600: pCh->speed = CBR_921600; break;
2526 default: pCh->speed = CBR_9600; break;
2527 }
2528 if ( pCh->speed == CBR_C1 ) {
2529 // Process the custom speed parameters.
2530 int bps = pCh->BaudBase / pCh->BaudDivisor;
2531 if ( bps == 921600 ) {
2532 pCh->speed = CBR_921600;
2533 } else {
2534 bps = bps/10;
2535 i2QueueCommands( PTYPE_INLINE, pCh, 100, 1, CMD_BAUD_DEF1(bps) );
2536 }
2537 }
2538 i2QueueCommands( PTYPE_INLINE, pCh, 100, 1, CMD_SETBAUD(pCh->speed));
2539
2540 i2QueueCommands ( PTYPE_INLINE, pCh, 100, 2, CMD_DTRUP, CMD_RTSUP);
2541 pCh->dataSetOut |= (I2_DTR | I2_RTS);
2542 }
2543 if ( (CSTOPB & cflag) ^ (CSTOPB & o_tios->c_cflag))
2544 {
2545 i2QueueCommands ( PTYPE_INLINE, pCh, 100, 1,
2546 CMD_SETSTOP( ( cflag & CSTOPB ) ? CST_2 : CST_1));
2547 }
2548 if (((PARENB|PARODD) & cflag) ^ ((PARENB|PARODD) & o_tios->c_cflag))
2549 {
2550 i2QueueCommands ( PTYPE_INLINE, pCh, 100, 1,
2551 CMD_SETPAR(
2552 (cflag & PARENB ? (cflag & PARODD ? CSP_OD : CSP_EV) : CSP_NP)
2553 )
2554 );
2555 }
2556 /* byte size and parity */
2557 if ( (CSIZE & cflag)^(CSIZE & o_tios->c_cflag))
2558 {
2559 int datasize;
2560 switch ( cflag & CSIZE ) {
2561 case CS5: datasize = CSZ_5; break;
2562 case CS6: datasize = CSZ_6; break;
2563 case CS7: datasize = CSZ_7; break;
2564 case CS8: datasize = CSZ_8; break;
2565 default: datasize = CSZ_5; break; /* as per serial.c */
2566 }
2567 i2QueueCommands ( PTYPE_INLINE, pCh, 100, 1, CMD_SETBITS(datasize) );
2568 }
2569 /* Process CTS flow control flag setting */
2570 if ( (cflag & CRTSCTS) ) {
2571 i2QueueCommands(PTYPE_INLINE, pCh, 100,
2572 2, CMD_CTSFL_ENAB, CMD_RTSFL_ENAB);
2573 } else {
2574 i2QueueCommands(PTYPE_INLINE, pCh, 100,
2575 2, CMD_CTSFL_DSAB, CMD_RTSFL_DSAB);
2576 }
2577 //
2578 // Process XON/XOFF flow control flags settings
2579 //
2580 stop_char = STOP_CHAR(pCh->pTTY);
2581 start_char = START_CHAR(pCh->pTTY);
2582
2583 //////////// can't be \000
2584 if (stop_char == __DISABLED_CHAR )
2585 {
2586 stop_char = ~__DISABLED_CHAR;
2587 }
2588 if (start_char == __DISABLED_CHAR )
2589 {
2590 start_char = ~__DISABLED_CHAR;
2591 }
2592 /////////////////////////////////
2593
2594 if ( o_tios->c_cc[VSTART] != start_char )
2595 {
2596 i2QueueCommands(PTYPE_BYPASS, pCh, 100, 1, CMD_DEF_IXON(start_char));
2597 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_DEF_OXON(start_char));
2598 }
2599 if ( o_tios->c_cc[VSTOP] != stop_char )
2600 {
2601 i2QueueCommands(PTYPE_BYPASS, pCh, 100, 1, CMD_DEF_IXOFF(stop_char));
2602 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_DEF_OXOFF(stop_char));
2603 }
2604 if (stop_char == __DISABLED_CHAR )
2605 {
2606 stop_char = ~__DISABLED_CHAR; //TEST123
2607 goto no_xoff;
2608 }
2609 if ((iflag & (IXOFF))^(o_tios->c_iflag & (IXOFF)))
2610 {
2611 if ( iflag & IXOFF ) { // Enable XOFF output flow control
2612 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_OXON_OPT(COX_XON));
2613 } else { // Disable XOFF output flow control
2614no_xoff:
2615 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_OXON_OPT(COX_NONE));
2616 }
2617 }
2618 if (start_char == __DISABLED_CHAR )
2619 {
2620 goto no_xon;
2621 }
2622 if ((iflag & (IXON|IXANY)) ^ (o_tios->c_iflag & (IXON|IXANY)))
2623 {
2624 if ( iflag & IXON ) {
2625 if ( iflag & IXANY ) { // Enable XON/XANY output flow control
2626 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_IXON_OPT(CIX_XANY));
2627 } else { // Enable XON output flow control
2628 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_IXON_OPT(CIX_XON));
2629 }
2630 } else { // Disable XON output flow control
2631no_xon:
2632 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_IXON_OPT(CIX_NONE));
2633 }
2634 }
2635 if ( (iflag & ISTRIP) ^ ( o_tios->c_iflag & (ISTRIP)) )
2636 {
2637 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1,
2638 CMD_ISTRIP_OPT((iflag & ISTRIP ? 1 : 0)));
2639 }
2640 if ( (iflag & INPCK) ^ ( o_tios->c_iflag & (INPCK)) )
2641 {
2642 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1,
2643 CMD_PARCHK((iflag & INPCK) ? CPK_ENAB : CPK_DSAB));
2644 }
2645
2646 if ( (iflag & (IGNBRK|PARMRK|BRKINT|IGNPAR))
2647 ^ ( o_tios->c_iflag & (IGNBRK|PARMRK|BRKINT|IGNPAR)) )
2648 {
2649 char brkrpt = 0;
2650 char parrpt = 0;
2651
2652 if ( iflag & IGNBRK ) { /* Ignore breaks altogether */
2653 /* Ignore breaks altogether */
2654 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_BRK_NREP);
2655 } else {
2656 if ( iflag & BRKINT ) {
2657 if ( iflag & PARMRK ) {
2658 brkrpt = 0x0a; // exception an inline triple
2659 } else {
2660 brkrpt = 0x1a; // exception and NULL
2661 }
2662 brkrpt |= 0x04; // flush input
2663 } else {
2664 if ( iflag & PARMRK ) {
2665 brkrpt = 0x0b; //POSIX triple \0377 \0 \0
2666 } else {
2667 brkrpt = 0x01; // Null only
2668 }
2669 }
2670 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_BRK_REP(brkrpt));
2671 }
2672
2673 if (iflag & IGNPAR) {
2674 parrpt = 0x20;
2675 /* would be 2 for not cirrus bug */
2676 /* would be 0x20 cept for cirrus bug */
2677 } else {
2678 if ( iflag & PARMRK ) {
2679 /*
2680 * Replace error characters with 3-byte sequence (\0377,\0,char)
2681 */
2682 parrpt = 0x04 ;
2683 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_ISTRIP_OPT((char)0));
2684 } else {
2685 parrpt = 0x03;
2686 }
2687 }
2688 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_SET_ERROR(parrpt));
2689 }
2690 if (cflag & CLOCAL) {
2691 // Status reporting fails for DCD if this is off
2692 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_DCD_NREP);
2693 pCh->flags &= ~ASYNC_CHECK_CD;
2694 } else {
2695 i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_DCD_REP);
2696 pCh->flags |= ASYNC_CHECK_CD;
2697 }
2698
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2699service_it:
2700 i2DrainOutput( pCh, 100 );
2701}
2702
2703/******************************************************************************/
2704/* IPL Device Section */
2705/******************************************************************************/
2706
2707/******************************************************************************/
2708/* Function: ip2_ipl_read() */
2709/* Parameters: Pointer to device inode */
2710/* Pointer to file structure */
2711/* Pointer to data */
2712/* Number of bytes to read */
2713/* Returns: Success or failure */
2714/* */
2715/* Description: Ugly */
2716/* */
2717/* */
2718/******************************************************************************/
2719
2720static
2721ssize_t
2722ip2_ipl_read(struct file *pFile, char __user *pData, size_t count, loff_t *off )
2723{
2724 unsigned int minor = iminor(pFile->f_dentry->d_inode);
2725 int rc = 0;
2726
2727#ifdef IP2DEBUG_IPL
2728 printk (KERN_DEBUG "IP2IPL: read %p, %d bytes\n", pData, count );
2729#endif
2730
2731 switch( minor ) {
2732 case 0: // IPL device
2733 rc = -EINVAL;
2734 break;
2735 case 1: // Status dump
2736 rc = -EINVAL;
2737 break;
2738 case 2: // Ping device
2739 rc = -EINVAL;
2740 break;
2741 case 3: // Trace device
2742 rc = DumpTraceBuffer ( pData, count );
2743 break;
2744 case 4: // Trace device
2745 rc = DumpFifoBuffer ( pData, count );
2746 break;
2747 default:
2748 rc = -ENODEV;
2749 break;
2750 }
2751 return rc;
2752}
2753
2754static int
2755DumpFifoBuffer ( char __user *pData, int count )
2756{
2757#ifdef DEBUG_FIFO
2758 int rc;
2759 rc = copy_to_user(pData, DBGBuf, count);
2760
2761 printk(KERN_DEBUG "Last index %d\n", I );
2762
2763 return count;
2764#endif /* DEBUG_FIFO */
2765 return 0;
2766}
2767
2768static int
2769DumpTraceBuffer ( char __user *pData, int count )
2770{
2771#ifdef IP2DEBUG_TRACE
2772 int rc;
2773 int dumpcount;
2774 int chunk;
2775 int *pIndex = (int __user *)pData;
2776
2777 if ( count < (sizeof(int) * 6) ) {
2778 return -EIO;
2779 }
2780 rc = put_user(tracewrap, pIndex );
2781 rc = put_user(TRACEMAX, ++pIndex );
2782 rc = put_user(tracestrip, ++pIndex );
2783 rc = put_user(tracestuff, ++pIndex );
2784 pData += sizeof(int) * 6;
2785 count -= sizeof(int) * 6;
2786
2787 dumpcount = tracestuff - tracestrip;
2788 if ( dumpcount < 0 ) {
2789 dumpcount += TRACEMAX;
2790 }
2791 if ( dumpcount > count ) {
2792 dumpcount = count;
2793 }
2794 chunk = TRACEMAX - tracestrip;
2795 if ( dumpcount > chunk ) {
2796 rc = copy_to_user(pData, &tracebuf[tracestrip],
2797 chunk * sizeof(tracebuf[0]) );
2798 pData += chunk * sizeof(tracebuf[0]);
2799 tracestrip = 0;
2800 chunk = dumpcount - chunk;
2801 } else {
2802 chunk = dumpcount;
2803 }
2804 rc = copy_to_user(pData, &tracebuf[tracestrip],
2805 chunk * sizeof(tracebuf[0]) );
2806 tracestrip += chunk;
2807 tracewrap = 0;
2808
2809 rc = put_user(tracestrip, ++pIndex );
2810 rc = put_user(tracestuff, ++pIndex );
2811
2812 return dumpcount;
2813#else
2814 return 0;
2815#endif
2816}
2817
2818/******************************************************************************/
2819/* Function: ip2_ipl_write() */
2820/* Parameters: */
2821/* Pointer to file structure */
2822/* Pointer to data */
2823/* Number of bytes to write */
2824/* Returns: Success or failure */
2825/* */
2826/* Description: */
2827/* */
2828/* */
2829/******************************************************************************/
2830static ssize_t
2831ip2_ipl_write(struct file *pFile, const char __user *pData, size_t count, loff_t *off)
2832{
2833#ifdef IP2DEBUG_IPL
2834 printk (KERN_DEBUG "IP2IPL: write %p, %d bytes\n", pData, count );
2835#endif
2836 return 0;
2837}
2838
2839/******************************************************************************/
2840/* Function: ip2_ipl_ioctl() */
2841/* Parameters: Pointer to device inode */
2842/* Pointer to file structure */
2843/* Command */
2844/* Argument */
2845/* Returns: Success or failure */
2846/* */
2847/* Description: */
2848/* */
2849/* */
2850/******************************************************************************/
2851static int
2852ip2_ipl_ioctl ( struct inode *pInode, struct file *pFile, UINT cmd, ULONG arg )
2853{
2854 unsigned int iplminor = iminor(pInode);
2855 int rc = 0;
2856 void __user *argp = (void __user *)arg;
2857 ULONG __user *pIndex = argp;
2858 i2eBordStrPtr pB = i2BoardPtrTable[iplminor / 4];
2859 i2ChanStrPtr pCh;
2860
2861#ifdef IP2DEBUG_IPL
2862 printk (KERN_DEBUG "IP2IPL: ioctl cmd %d, arg %ld\n", cmd, arg );
2863#endif
2864
2865 switch ( iplminor ) {
2866 case 0: // IPL device
2867 rc = -EINVAL;
2868 break;
2869 case 1: // Status dump
2870 case 5:
2871 case 9:
2872 case 13:
2873 switch ( cmd ) {
2874 case 64: /* Driver - ip2stat */
2875 rc = put_user(ip2_tty_driver->refcount, pIndex++ );
2876 rc = put_user(irq_counter, pIndex++ );
2877 rc = put_user(bh_counter, pIndex++ );
2878 break;
2879
2880 case 65: /* Board - ip2stat */
2881 if ( pB ) {
2882 rc = copy_to_user(argp, pB, sizeof(i2eBordStr));
2883 rc = put_user(INB(pB->i2eStatus),
2884 (ULONG __user *)(arg + (ULONG)(&pB->i2eStatus) - (ULONG)pB ) );
2885 } else {
2886 rc = -ENODEV;
2887 }
2888 break;
2889
2890 default:
2891 if (cmd < IP2_MAX_PORTS) {
2892 pCh = DevTable[cmd];
2893 if ( pCh )
2894 {
2895 rc = copy_to_user(argp, pCh, sizeof(i2ChanStr));
2896 } else {
2897 rc = -ENODEV;
2898 }
2899 } else {
2900 rc = -EINVAL;
2901 }
2902 }
2903 break;
2904
2905 case 2: // Ping device
2906 rc = -EINVAL;
2907 break;
2908 case 3: // Trace device
Andrew Mortondef93912006-02-03 03:04:47 -0800[diff] [blame^]2909 /*
2910 * akpm: This used to write a whole bunch of function addresses
2911 * to userspace, which generated lots of put_user() warnings.
2912 * I killed it all. Just return "success" and don't do
2913 * anything.
2914 */
2915 if (cmd == 1)
2916 rc = 0;
2917 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2918 rc = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2919 break;
2920
2921 default:
2922 rc = -ENODEV;
2923 break;
2924 }
2925 return rc;
2926}
2927
2928/******************************************************************************/
2929/* Function: ip2_ipl_open() */
2930/* Parameters: Pointer to device inode */
2931/* Pointer to file structure */
2932/* Returns: Success or failure */
2933/* */
2934/* Description: */
2935/* */
2936/* */
2937/******************************************************************************/
2938static int
2939ip2_ipl_open( struct inode *pInode, struct file *pFile )
2940{
2941 unsigned int iplminor = iminor(pInode);
2942 i2eBordStrPtr pB;
2943 i2ChanStrPtr pCh;
2944
2945#ifdef IP2DEBUG_IPL
2946 printk (KERN_DEBUG "IP2IPL: open\n" );
2947#endif
2948
2949 switch(iplminor) {
2950 // These are the IPL devices
2951 case 0:
2952 case 4:
2953 case 8:
2954 case 12:
2955 break;
2956
2957 // These are the status devices
2958 case 1:
2959 case 5:
2960 case 9:
2961 case 13:
2962 break;
2963
2964 // These are the debug devices
2965 case 2:
2966 case 6:
2967 case 10:
2968 case 14:
2969 pB = i2BoardPtrTable[iplminor / 4];
2970 pCh = (i2ChanStrPtr) pB->i2eChannelPtr;
2971 break;
2972
2973 // This is the trace device
2974 case 3:
2975 break;
2976 }
2977 return 0;
2978}
2979/******************************************************************************/
2980/* Function: ip2_read_procmem */
2981/* Parameters: */
2982/* */
2983/* Returns: Length of output */
2984/* */
2985/* Description: */
2986/* Supplies some driver operating parameters */
2987/* Not real useful unless your debugging the fifo */
2988/* */
2989/******************************************************************************/
2990
2991#define LIMIT (PAGE_SIZE - 120)
2992
2993static int
2994ip2_read_procmem(char *buf, char **start, off_t offset, int len)
2995{
2996 i2eBordStrPtr pB;
2997 i2ChanStrPtr pCh;
2998 PTTY tty;
2999 int i;
3000
3001 len = 0;
3002
3003#define FMTLINE "%3d: 0x%08x 0x%08x 0%011o 0%011o\n"
3004#define FMTLIN2 " 0x%04x 0x%04x tx flow 0x%x\n"
3005#define FMTLIN3 " 0x%04x 0x%04x rc flow\n"
3006
3007 len += sprintf(buf+len,"\n");
3008
3009 for( i = 0; i < IP2_MAX_BOARDS; ++i ) {
3010 pB = i2BoardPtrTable[i];
3011 if ( pB ) {
3012 len += sprintf(buf+len,"board %d:\n",i);
3013 len += sprintf(buf+len,"\tFifo rem: %d mty: %x outM %x\n",
3014 pB->i2eFifoRemains,pB->i2eWaitingForEmptyFifo,pB->i2eOutMailWaiting);
3015 }
3016 }
3017
3018 len += sprintf(buf+len,"#: tty flags, port flags, cflags, iflags\n");
3019 for (i=0; i < IP2_MAX_PORTS; i++) {
3020 if (len > LIMIT)
3021 break;
3022 pCh = DevTable[i];
3023 if (pCh) {
3024 tty = pCh->pTTY;
3025 if (tty && tty->count) {
3026 len += sprintf(buf+len,FMTLINE,i,(int)tty->flags,pCh->flags,
3027 tty->termios->c_cflag,tty->termios->c_iflag);
3028
3029 len += sprintf(buf+len,FMTLIN2,
3030 pCh->outfl.asof,pCh->outfl.room,pCh->channelNeeds);
3031 len += sprintf(buf+len,FMTLIN3,pCh->infl.asof,pCh->infl.room);
3032 }
3033 }
3034 }
3035 return len;
3036}
3037
3038/*
3039 * This is the handler for /proc/tty/driver/ip2
3040 *
3041 * This stretch of code has been largely plagerized from at least three
3042 * different sources including ip2mkdev.c and a couple of other drivers.
3043 * The bugs are all mine. :-) =mhw=
3044 */
3045static int ip2_read_proc(char *page, char **start, off_t off,
3046 int count, int *eof, void *data)
3047{
3048 int i, j, box;
3049 int len = 0;
3050 int boxes = 0;
3051 int ports = 0;
3052 int tports = 0;
3053 off_t begin = 0;
3054 i2eBordStrPtr pB;
3055
3056 len += sprintf(page, "ip2info: 1.0 driver: %s\n", pcVersion );
3057 len += sprintf(page+len, "Driver: SMajor=%d CMajor=%d IMajor=%d MaxBoards=%d MaxBoxes=%d MaxPorts=%d\n",
3058 IP2_TTY_MAJOR, IP2_CALLOUT_MAJOR, IP2_IPL_MAJOR,
3059 IP2_MAX_BOARDS, ABS_MAX_BOXES, ABS_BIGGEST_BOX);
3060
3061 for( i = 0; i < IP2_MAX_BOARDS; ++i ) {
3062 /* This need to be reset for a board by board count... */
3063 boxes = 0;
3064 pB = i2BoardPtrTable[i];
3065 if( pB ) {
3066 switch( pB->i2ePom.e.porID & ~POR_ID_RESERVED )
3067 {
3068 case POR_ID_FIIEX:
3069 len += sprintf( page+len, "Board %d: EX ports=", i );
3070 for( box = 0; box < ABS_MAX_BOXES; ++box )
3071 {
3072 ports = 0;
3073
3074 if( pB->i2eChannelMap[box] != 0 ) ++boxes;
3075 for( j = 0; j < ABS_BIGGEST_BOX; ++j )
3076 {
3077 if( pB->i2eChannelMap[box] & 1<< j ) {
3078 ++ports;
3079 }
3080 }
3081 len += sprintf( page+len, "%d,", ports );
3082 tports += ports;
3083 }
3084
3085 --len; /* Backup over that last comma */
3086
3087 len += sprintf( page+len, " boxes=%d width=%d", boxes, pB->i2eDataWidth16 ? 16 : 8 );
3088 break;
3089
3090 case POR_ID_II_4:
3091 len += sprintf(page+len, "Board %d: ISA-4 ports=4 boxes=1", i );
3092 tports = ports = 4;
3093 break;
3094
3095 case POR_ID_II_8:
3096 len += sprintf(page+len, "Board %d: ISA-8-std ports=8 boxes=1", i );
3097 tports = ports = 8;
3098 break;
3099
3100 case POR_ID_II_8R:
3101 len += sprintf(page+len, "Board %d: ISA-8-RJ11 ports=8 boxes=1", i );
3102 tports = ports = 8;
3103 break;
3104
3105 default:
3106 len += sprintf(page+len, "Board %d: unknown", i );
3107 /* Don't try and probe for minor numbers */
3108 tports = ports = 0;
3109 }
3110
3111 } else {
3112 /* Don't try and probe for minor numbers */
3113 len += sprintf(page+len, "Board %d: vacant", i );
3114 tports = ports = 0;
3115 }
3116
3117 if( tports ) {
3118 len += sprintf(page+len, " minors=" );
3119
3120 for ( box = 0; box < ABS_MAX_BOXES; ++box )
3121 {
3122 for ( j = 0; j < ABS_BIGGEST_BOX; ++j )
3123 {
3124 if ( pB->i2eChannelMap[box] & (1 << j) )
3125 {
3126 len += sprintf (page+len,"%d,",
3127 j + ABS_BIGGEST_BOX *
3128 (box+i*ABS_MAX_BOXES));
3129 }
3130 }
3131 }
3132
3133 page[ len - 1 ] = '\n'; /* Overwrite that last comma */
3134 } else {
3135 len += sprintf (page+len,"\n" );
3136 }
3137
3138 if (len+begin > off+count)
3139 break;
3140 if (len+begin < off) {
3141 begin += len;
3142 len = 0;
3143 }
3144 }
3145
3146 if (i >= IP2_MAX_BOARDS)
3147 *eof = 1;
3148 if (off >= len+begin)
3149 return 0;
3150
3151 *start = page + (off-begin);
3152 return ((count < begin+len-off) ? count : begin+len-off);
3153 }
3154
3155/******************************************************************************/
3156/* Function: ip2trace() */
3157/* Parameters: Value to add to trace buffer */
3158/* Returns: Nothing */
3159/* */
3160/* Description: */
3161/* */
3162/* */
3163/******************************************************************************/
3164#ifdef IP2DEBUG_TRACE
3165void
3166ip2trace (unsigned short pn, unsigned char cat, unsigned char label, unsigned long codes, ...)
3167{
3168 long flags;
3169 unsigned long *pCode = &codes;
3170 union ip2breadcrumb bc;
3171 i2ChanStrPtr pCh;
3172
3173
3174 tracebuf[tracestuff++] = jiffies;
3175 if ( tracestuff == TRACEMAX ) {
3176 tracestuff = 0;
3177 }
3178 if ( tracestuff == tracestrip ) {
3179 if ( ++tracestrip == TRACEMAX ) {
3180 tracestrip = 0;
3181 }
3182 ++tracewrap;
3183 }
3184
3185 bc.hdr.port = 0xff & pn;
3186 bc.hdr.cat = cat;
3187 bc.hdr.codes = (unsigned char)( codes & 0xff );
3188 bc.hdr.label = label;
3189 tracebuf[tracestuff++] = bc.value;
3190
3191 for (;;) {
3192 if ( tracestuff == TRACEMAX ) {
3193 tracestuff = 0;
3194 }
3195 if ( tracestuff == tracestrip ) {
3196 if ( ++tracestrip == TRACEMAX ) {
3197 tracestrip = 0;
3198 }
3199 ++tracewrap;
3200 }
3201
3202 if ( !codes-- )
3203 break;
3204
3205 tracebuf[tracestuff++] = *++pCode;
3206 }
3207}
3208#endif
3209
3210
3211MODULE_LICENSE("GPL");