/* * Copyright 2003 Digi International (www.digi.com) * Scott H Kilau * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR * PURPOSE. See the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * * NOTE TO LINUX KERNEL HACKERS: DO NOT REFORMAT THIS CODE! * * This is shared code between Digi's CVS archive and the * Linux Kernel sources. * Changing the source just for reformatting needlessly breaks * our CVS diff history. * * Send any bug fixes/changes to: Eng.Linux at digi dot com. * Thank you. * */ #include #include #include #include #include #include "dgnc_driver.h" #include "dgnc_pci.h" #include "dpacompat.h" #include "dgnc_mgmt.h" #include "dgnc_tty.h" #include "dgnc_trace.h" #include "dgnc_cls.h" #include "dgnc_neo.h" #include "dgnc_sysfs.h" MODULE_LICENSE("GPL"); MODULE_AUTHOR("Digi International, http://www.digi.com"); MODULE_DESCRIPTION("Driver for the Digi International Neo and Classic PCI based product line"); MODULE_SUPPORTED_DEVICE("dgnc"); /* * insmod command line overrideable parameters * * NOTE: we use a set of macros to create the variables, which allows * us to specify the variable type, name, initial value, and description. */ PARM_INT(debug, 0x00, 0644, "Driver debugging level"); PARM_INT(rawreadok, 1, 0644, "Bypass flip buffers on input"); PARM_INT(trcbuf_size, 0x100000, 0644, "Debugging trace buffer size."); /************************************************************************** * * protos for this file * */ static int dgnc_start(void); static int dgnc_finalize_board_init(struct dgnc_board *brd); static void dgnc_init_globals(void); static int dgnc_found_board(struct pci_dev *pdev, int id); static void dgnc_cleanup_board(struct dgnc_board *brd); static void dgnc_poll_handler(ulong dummy); static int dgnc_init_pci(void); static int dgnc_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); static void dgnc_remove_one(struct pci_dev *dev); static int dgnc_probe1(struct pci_dev *pdev, int card_type); static void dgnc_do_remap(struct dgnc_board *brd); /* Driver load/unload functions */ int dgnc_init_module(void); void dgnc_cleanup_module(void); module_init(dgnc_init_module); module_exit(dgnc_cleanup_module); /* * File operations permitted on Control/Management major. */ static struct file_operations dgnc_BoardFops = { .owner = THIS_MODULE, .unlocked_ioctl = dgnc_mgmt_ioctl, .open = dgnc_mgmt_open, .release = dgnc_mgmt_close }; /* * Globals */ uint dgnc_NumBoards; struct dgnc_board *dgnc_Board[MAXBOARDS]; DEFINE_SPINLOCK(dgnc_global_lock); int dgnc_driver_state = DRIVER_INITIALIZED; ulong dgnc_poll_counter; uint dgnc_Major; int dgnc_poll_tick = 20; /* Poll interval - 20 ms */ /* * Static vars. */ static uint dgnc_Major_Control_Registered = FALSE; static uint dgnc_driver_start = FALSE; static struct class *dgnc_class; /* * Poller stuff */ static DEFINE_SPINLOCK(dgnc_poll_lock); /* Poll scheduling lock */ static ulong dgnc_poll_time; /* Time of next poll */ static uint dgnc_poll_stop; /* Used to tell poller to stop */ static struct timer_list dgnc_poll_timer; static struct pci_device_id dgnc_pci_tbl[] = { { DIGI_VID, PCI_DEVICE_CLASSIC_4_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, { DIGI_VID, PCI_DEVICE_CLASSIC_4_422_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1 }, { DIGI_VID, PCI_DEVICE_CLASSIC_8_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2 }, { DIGI_VID, PCI_DEVICE_CLASSIC_8_422_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 3 }, { DIGI_VID, PCI_DEVICE_NEO_4_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4 }, { DIGI_VID, PCI_DEVICE_NEO_8_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 5 }, { DIGI_VID, PCI_DEVICE_NEO_2DB9_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 6 }, { DIGI_VID, PCI_DEVICE_NEO_2DB9PRI_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 7 }, { DIGI_VID, PCI_DEVICE_NEO_2RJ45_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 8 }, { DIGI_VID, PCI_DEVICE_NEO_2RJ45PRI_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 9 }, { DIGI_VID, PCI_DEVICE_NEO_1_422_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 10 }, { DIGI_VID, PCI_DEVICE_NEO_1_422_485_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 11 }, { DIGI_VID, PCI_DEVICE_NEO_2_422_485_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 12 }, { DIGI_VID, PCI_DEVICE_NEO_EXPRESS_8_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 13 }, { DIGI_VID, PCI_DEVICE_NEO_EXPRESS_4_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 14 }, { DIGI_VID, PCI_DEVICE_NEO_EXPRESS_4RJ45_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 15 }, { DIGI_VID, PCI_DEVICE_NEO_EXPRESS_8RJ45_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 16 }, {0,} /* 0 terminated list. */ }; MODULE_DEVICE_TABLE(pci, dgnc_pci_tbl); struct board_id { uchar *name; uint maxports; unsigned int is_pci_express; }; static struct board_id dgnc_Ids[] = { { PCI_DEVICE_CLASSIC_4_PCI_NAME, 4, 0 }, { PCI_DEVICE_CLASSIC_4_422_PCI_NAME, 4, 0 }, { PCI_DEVICE_CLASSIC_8_PCI_NAME, 8, 0 }, { PCI_DEVICE_CLASSIC_8_422_PCI_NAME, 8, 0 }, { PCI_DEVICE_NEO_4_PCI_NAME, 4, 0 }, { PCI_DEVICE_NEO_8_PCI_NAME, 8, 0 }, { PCI_DEVICE_NEO_2DB9_PCI_NAME, 2, 0 }, { PCI_DEVICE_NEO_2DB9PRI_PCI_NAME, 2, 0 }, { PCI_DEVICE_NEO_2RJ45_PCI_NAME, 2, 0 }, { PCI_DEVICE_NEO_2RJ45PRI_PCI_NAME, 2, 0 }, { PCI_DEVICE_NEO_1_422_PCI_NAME, 1, 0 }, { PCI_DEVICE_NEO_1_422_485_PCI_NAME, 1, 0 }, { PCI_DEVICE_NEO_2_422_485_PCI_NAME, 2, 0 }, { PCI_DEVICE_NEO_EXPRESS_8_PCI_NAME, 8, 1 }, { PCI_DEVICE_NEO_EXPRESS_4_PCI_NAME, 4, 1 }, { PCI_DEVICE_NEO_EXPRESS_4RJ45_PCI_NAME, 4, 1 }, { PCI_DEVICE_NEO_EXPRESS_8RJ45_PCI_NAME, 8, 1 }, { NULL, 0, 0 } }; static struct pci_driver dgnc_driver = { .name = "dgnc", .probe = dgnc_init_one, .id_table = dgnc_pci_tbl, .remove = dgnc_remove_one, }; char *dgnc_state_text[] = { "Board Failed", "Board Found", "Board READY", }; char *dgnc_driver_state_text[] = { "Driver Initialized", "Driver Ready." }; /************************************************************************ * * Driver load/unload functions * ************************************************************************/ /* * init_module() * * Module load. This is where it all starts. */ int dgnc_init_module(void) { int rc = 0; APR(("%s, Digi International Part Number %s\n", DG_NAME, DG_PART)); /* * Initialize global stuff */ rc = dgnc_start(); if (rc < 0) { return rc; } /* * Find and configure all the cards */ rc = dgnc_init_pci(); /* * If something went wrong in the scan, bail out of driver. */ if (rc < 0) { /* Only unregister the pci driver if it was actually registered. */ if (dgnc_NumBoards) pci_unregister_driver(&dgnc_driver); else printk("WARNING: dgnc driver load failed. No Digi Neo or Classic boards found.\n"); dgnc_cleanup_module(); } else { dgnc_create_driver_sysfiles(&dgnc_driver); } DPR_INIT(("Finished init_module. Returning %d\n", rc)); return rc; } /* * Start of driver. */ static int dgnc_start(void) { int rc = 0; unsigned long flags; if (dgnc_driver_start == FALSE) { dgnc_driver_start = TRUE; /* make sure that the globals are init'd before we do anything else */ dgnc_init_globals(); dgnc_NumBoards = 0; APR(("For the tools package or updated drivers please visit http://www.digi.com\n")); /* * Register our base character device into the kernel. * This allows the download daemon to connect to the downld device * before any of the boards are init'ed. */ if (!dgnc_Major_Control_Registered) { /* * Register management/dpa devices */ rc = register_chrdev(0, "dgnc", &dgnc_BoardFops); if (rc <= 0) { APR(("Can't register dgnc driver device (%d)\n", rc)); rc = -ENXIO; return rc; } dgnc_Major = rc; dgnc_class = class_create(THIS_MODULE, "dgnc_mgmt"); device_create(dgnc_class, NULL, MKDEV(dgnc_Major, 0), NULL, "dgnc_mgmt"); dgnc_Major_Control_Registered = TRUE; } /* * Init any global tty stuff. */ rc = dgnc_tty_preinit(); if (rc < 0) { APR(("tty preinit - not enough memory (%d)\n", rc)); return rc; } /* Start the poller */ DGNC_LOCK(dgnc_poll_lock, flags); init_timer(&dgnc_poll_timer); dgnc_poll_timer.function = dgnc_poll_handler; dgnc_poll_timer.data = 0; dgnc_poll_time = jiffies + dgnc_jiffies_from_ms(dgnc_poll_tick); dgnc_poll_timer.expires = dgnc_poll_time; DGNC_UNLOCK(dgnc_poll_lock, flags); add_timer(&dgnc_poll_timer); dgnc_driver_state = DRIVER_READY; } return rc; } /* * Register pci driver, and return how many boards we have. */ static int dgnc_init_pci(void) { return pci_register_driver(&dgnc_driver); } /* returns count (>= 0), or negative on error */ static int dgnc_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) { int rc; /* wake up and enable device */ rc = pci_enable_device(pdev); if (rc < 0) { rc = -EIO; } else { rc = dgnc_probe1(pdev, ent->driver_data); if (rc == 0) { dgnc_NumBoards++; DPR_INIT(("Incrementing numboards to %d\n", dgnc_NumBoards)); } } return rc; } static int dgnc_probe1(struct pci_dev *pdev, int card_type) { return dgnc_found_board(pdev, card_type); } static void dgnc_remove_one(struct pci_dev *dev) { /* Do Nothing */ } /* * dgnc_cleanup_module() * * Module unload. This is where it all ends. */ void dgnc_cleanup_module(void) { int i; ulong lock_flags; DGNC_LOCK(dgnc_poll_lock, lock_flags); dgnc_poll_stop = 1; DGNC_UNLOCK(dgnc_poll_lock, lock_flags); /* Turn off poller right away. */ del_timer_sync(&dgnc_poll_timer); dgnc_remove_driver_sysfiles(&dgnc_driver); if (dgnc_Major_Control_Registered) { device_destroy(dgnc_class, MKDEV(dgnc_Major, 0)); class_destroy(dgnc_class); unregister_chrdev(dgnc_Major, "dgnc"); } for (i = 0; i < dgnc_NumBoards; ++i) { dgnc_remove_ports_sysfiles(dgnc_Board[i]); dgnc_tty_uninit(dgnc_Board[i]); dgnc_cleanup_board(dgnc_Board[i]); } dgnc_tty_post_uninit(); #if defined(DGNC_TRACER) /* last thing, make sure we release the tracebuffer */ dgnc_tracer_free(); #endif if (dgnc_NumBoards) pci_unregister_driver(&dgnc_driver); } /* * dgnc_cleanup_board() * * Free all the memory associated with a board */ static void dgnc_cleanup_board(struct dgnc_board *brd) { int i = 0; if(!brd || brd->magic != DGNC_BOARD_MAGIC) return; switch (brd->device) { case PCI_DEVICE_CLASSIC_4_DID: case PCI_DEVICE_CLASSIC_8_DID: case PCI_DEVICE_CLASSIC_4_422_DID: case PCI_DEVICE_CLASSIC_8_422_DID: /* Tell card not to interrupt anymore. */ outb(0, brd->iobase + 0x4c); break; default: break; } if (brd->irq) free_irq(brd->irq, brd); tasklet_kill(&brd->helper_tasklet); if (brd->re_map_membase) { iounmap(brd->re_map_membase); brd->re_map_membase = NULL; } if (brd->msgbuf_head) { unsigned long flags; DGNC_LOCK(dgnc_global_lock, flags); brd->msgbuf = NULL; printk("%s", brd->msgbuf_head); kfree(brd->msgbuf_head); brd->msgbuf_head = NULL; DGNC_UNLOCK(dgnc_global_lock, flags); } /* Free all allocated channels structs */ for (i = 0; i < MAXPORTS ; i++) { if (brd->channels[i]) { if (brd->channels[i]->ch_rqueue) kfree(brd->channels[i]->ch_rqueue); if (brd->channels[i]->ch_equeue) kfree(brd->channels[i]->ch_equeue); if (brd->channels[i]->ch_wqueue) kfree(brd->channels[i]->ch_wqueue); kfree(brd->channels[i]); brd->channels[i] = NULL; } } if (brd->flipbuf) kfree(brd->flipbuf); dgnc_Board[brd->boardnum] = NULL; kfree(brd); } /* * dgnc_found_board() * * A board has been found, init it. */ static int dgnc_found_board(struct pci_dev *pdev, int id) { struct dgnc_board *brd; unsigned int pci_irq; int i = 0; int rc = 0; unsigned long flags; /* get the board structure and prep it */ brd = dgnc_Board[dgnc_NumBoards] = kzalloc(sizeof(*brd), GFP_KERNEL); if (!brd) return -ENOMEM; /* make a temporary message buffer for the boot messages */ brd->msgbuf = brd->msgbuf_head = kzalloc(sizeof(u8) * 8192, GFP_KERNEL); if (!brd->msgbuf) { kfree(brd); return -ENOMEM; } /* store the info for the board we've found */ brd->magic = DGNC_BOARD_MAGIC; brd->boardnum = dgnc_NumBoards; brd->vendor = dgnc_pci_tbl[id].vendor; brd->device = dgnc_pci_tbl[id].device; brd->pdev = pdev; brd->pci_bus = pdev->bus->number; brd->pci_slot = PCI_SLOT(pdev->devfn); brd->name = dgnc_Ids[id].name; brd->maxports = dgnc_Ids[id].maxports; if (dgnc_Ids[i].is_pci_express) brd->bd_flags |= BD_IS_PCI_EXPRESS; brd->dpastatus = BD_NOFEP; init_waitqueue_head(&brd->state_wait); DGNC_SPINLOCK_INIT(brd->bd_lock); DGNC_SPINLOCK_INIT(brd->bd_intr_lock); brd->state = BOARD_FOUND; for (i = 0; i < MAXPORTS; i++) { brd->channels[i] = NULL; } /* store which card & revision we have */ pci_read_config_word(pdev, PCI_SUBSYSTEM_VENDOR_ID, &brd->subvendor); pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &brd->subdevice); pci_read_config_byte(pdev, PCI_REVISION_ID, &brd->rev); pci_irq = pdev->irq; brd->irq = pci_irq; switch(brd->device) { case PCI_DEVICE_CLASSIC_4_DID: case PCI_DEVICE_CLASSIC_8_DID: case PCI_DEVICE_CLASSIC_4_422_DID: case PCI_DEVICE_CLASSIC_8_422_DID: brd->dpatype = T_CLASSIC | T_PCIBUS; DPR_INIT(("dgnc_found_board - Classic.\n")); /* * For PCI ClassicBoards * PCI Local Address (i.e. "resource" number) space * 0 PLX Memory Mapped Config * 1 PLX I/O Mapped Config * 2 I/O Mapped UARTs and Status * 3 Memory Mapped VPD * 4 Memory Mapped UARTs and Status */ /* get the PCI Base Address Registers */ brd->membase = pci_resource_start(pdev, 4); if (!brd->membase) { APR(("card has no PCI IO resources, failing board.\n")); return -ENODEV; } brd->membase_end = pci_resource_end(pdev, 4); if (brd->membase & 1) brd->membase &= ~3; else brd->membase &= ~15; brd->iobase = pci_resource_start(pdev, 1); brd->iobase_end = pci_resource_end(pdev, 1); brd->iobase = ((unsigned int) (brd->iobase)) & 0xFFFE; /* Assign the board_ops struct */ brd->bd_ops = &dgnc_cls_ops; brd->bd_uart_offset = 0x8; brd->bd_dividend = 921600; dgnc_do_remap(brd); /* Get and store the board VPD, if it exists */ brd->bd_ops->vpd(brd); /* * Enable Local Interrupt 1 (0x1), * Local Interrupt 1 Polarity Active high (0x2), * Enable PCI interrupt (0x40) */ outb(0x43, brd->iobase + 0x4c); break; case PCI_DEVICE_NEO_4_DID: case PCI_DEVICE_NEO_8_DID: case PCI_DEVICE_NEO_2DB9_DID: case PCI_DEVICE_NEO_2DB9PRI_DID: case PCI_DEVICE_NEO_2RJ45_DID: case PCI_DEVICE_NEO_2RJ45PRI_DID: case PCI_DEVICE_NEO_1_422_DID: case PCI_DEVICE_NEO_1_422_485_DID: case PCI_DEVICE_NEO_2_422_485_DID: case PCI_DEVICE_NEO_EXPRESS_8_DID: case PCI_DEVICE_NEO_EXPRESS_4_DID: case PCI_DEVICE_NEO_EXPRESS_4RJ45_DID: case PCI_DEVICE_NEO_EXPRESS_8RJ45_DID: /* * This chip is set up 100% when we get to it. * No need to enable global interrupts or anything. */ if (brd->bd_flags & BD_IS_PCI_EXPRESS) brd->dpatype = T_NEO_EXPRESS | T_PCIBUS; else brd->dpatype = T_NEO | T_PCIBUS; DPR_INIT(("dgnc_found_board - NEO.\n")); /* get the PCI Base Address Registers */ brd->membase = pci_resource_start(pdev, 0); brd->membase_end = pci_resource_end(pdev, 0); if (brd->membase & 1) brd->membase &= ~3; else brd->membase &= ~15; /* Assign the board_ops struct */ brd->bd_ops = &dgnc_neo_ops; brd->bd_uart_offset = 0x200; brd->bd_dividend = 921600; dgnc_do_remap(brd); if (brd->re_map_membase) { /* After remap is complete, we need to read and store the dvid */ brd->dvid = readb(brd->re_map_membase + 0x8D); /* Get and store the board VPD, if it exists */ brd->bd_ops->vpd(brd); } break; default: APR(("Did not find any compatible Neo or Classic PCI boards in system.\n")); return -ENXIO; } /* * Do tty device initialization. */ rc = dgnc_tty_register(brd); if (rc < 0) { dgnc_tty_uninit(brd); APR(("Can't register tty devices (%d)\n", rc)); brd->state = BOARD_FAILED; brd->dpastatus = BD_NOFEP; goto failed; } rc = dgnc_finalize_board_init(brd); if (rc < 0) { APR(("Can't finalize board init (%d)\n", rc)); brd->state = BOARD_FAILED; brd->dpastatus = BD_NOFEP; goto failed; } rc = dgnc_tty_init(brd); if (rc < 0) { dgnc_tty_uninit(brd); APR(("Can't init tty devices (%d)\n", rc)); brd->state = BOARD_FAILED; brd->dpastatus = BD_NOFEP; goto failed; } brd->state = BOARD_READY; brd->dpastatus = BD_RUNNING; dgnc_create_ports_sysfiles(brd); /* init our poll helper tasklet */ tasklet_init(&brd->helper_tasklet, brd->bd_ops->tasklet, (unsigned long) brd); DPR_INIT(("dgnc_scan(%d) - printing out the msgbuf\n", i)); DGNC_LOCK(dgnc_global_lock, flags); brd->msgbuf = NULL; printk("%s", brd->msgbuf_head); kfree(brd->msgbuf_head); brd->msgbuf_head = NULL; DGNC_UNLOCK(dgnc_global_lock, flags); /* * allocate flip buffer for board. * * Okay to malloc with GFP_KERNEL, we are not at interrupt * context, and there are no locks held. */ brd->flipbuf = kzalloc(MYFLIPLEN, GFP_KERNEL); wake_up_interruptible(&brd->state_wait); return 0; failed: return -ENXIO; } static int dgnc_finalize_board_init(struct dgnc_board *brd) { int rc = 0; DPR_INIT(("dgnc_finalize_board_init() - start\n")); if (!brd || brd->magic != DGNC_BOARD_MAGIC) return -ENODEV; DPR_INIT(("dgnc_finalize_board_init() - start #2\n")); if (brd->irq) { rc = request_irq(brd->irq, brd->bd_ops->intr, IRQF_SHARED, "DGNC", brd); if (rc) { printk("Failed to hook IRQ %d\n",brd->irq); brd->state = BOARD_FAILED; brd->dpastatus = BD_NOFEP; rc = -ENODEV; } else { DPR_INIT(("Requested and received usage of IRQ %d\n", brd->irq)); } } return rc; } /* * Remap PCI memory. */ static void dgnc_do_remap(struct dgnc_board *brd) { if (!brd || brd->magic != DGNC_BOARD_MAGIC) return; brd->re_map_membase = ioremap(brd->membase, 0x1000); DPR_INIT(("remapped mem: 0x%p\n", brd->re_map_membase)); } /***************************************************************************** * * Function: * * dgnc_poll_handler * * Author: * * Scott H Kilau * * Parameters: * * dummy -- ignored * * Return Values: * * none * * Description: * * As each timer expires, it determines (a) whether the "transmit" * waiter needs to be woken up, and (b) whether the poller needs to * be rescheduled. * ******************************************************************************/ static void dgnc_poll_handler(ulong dummy) { struct dgnc_board *brd; unsigned long lock_flags; int i; unsigned long new_time; dgnc_poll_counter++; /* * Do not start the board state machine until * driver tells us its up and running, and has * everything it needs. */ if (dgnc_driver_state != DRIVER_READY) { goto schedule_poller; } /* Go thru each board, kicking off a tasklet for each if needed */ for (i = 0; i < dgnc_NumBoards; i++) { brd = dgnc_Board[i]; DGNC_LOCK(brd->bd_lock, lock_flags); /* If board is in a failed state, don't bother scheduling a tasklet */ if (brd->state == BOARD_FAILED) { DGNC_UNLOCK(brd->bd_lock, lock_flags); continue; } /* Schedule a poll helper task */ tasklet_schedule(&brd->helper_tasklet); DGNC_UNLOCK(brd->bd_lock, lock_flags); } schedule_poller: /* * Schedule ourself back at the nominal wakeup interval. */ DGNC_LOCK(dgnc_poll_lock, lock_flags); dgnc_poll_time += dgnc_jiffies_from_ms(dgnc_poll_tick); new_time = dgnc_poll_time - jiffies; if ((ulong) new_time >= 2 * dgnc_poll_tick) { dgnc_poll_time = jiffies + dgnc_jiffies_from_ms(dgnc_poll_tick); } init_timer(&dgnc_poll_timer); dgnc_poll_timer.function = dgnc_poll_handler; dgnc_poll_timer.data = 0; dgnc_poll_timer.expires = dgnc_poll_time; DGNC_UNLOCK(dgnc_poll_lock, lock_flags); if (!dgnc_poll_stop) add_timer(&dgnc_poll_timer); } /* * dgnc_init_globals() * * This is where we initialize the globals from the static insmod * configuration variables. These are declared near the head of * this file. */ static void dgnc_init_globals(void) { int i = 0; dgnc_rawreadok = rawreadok; dgnc_trcbuf_size = trcbuf_size; dgnc_debug = debug; for (i = 0; i < MAXBOARDS; i++) { dgnc_Board[i] = NULL; } init_timer(&dgnc_poll_timer); } /************************************************************************ * * Utility functions * ************************************************************************/ /* * dgnc_ms_sleep() * * Put the driver to sleep for x ms's * * Returns 0 if timed out, !0 (showing signal) if interrupted by a signal. */ int dgnc_ms_sleep(ulong ms) { current->state = TASK_INTERRUPTIBLE; schedule_timeout((ms * HZ) / 1000); return signal_pending(current); } /* * dgnc_ioctl_name() : Returns a text version of each ioctl value. */ char *dgnc_ioctl_name(int cmd) { switch(cmd) { case TCGETA: return "TCGETA"; case TCGETS: return "TCGETS"; case TCSETA: return "TCSETA"; case TCSETS: return "TCSETS"; case TCSETAW: return "TCSETAW"; case TCSETSW: return "TCSETSW"; case TCSETAF: return "TCSETAF"; case TCSETSF: return "TCSETSF"; case TCSBRK: return "TCSBRK"; case TCXONC: return "TCXONC"; case TCFLSH: return "TCFLSH"; case TIOCGSID: return "TIOCGSID"; case TIOCGETD: return "TIOCGETD"; case TIOCSETD: return "TIOCSETD"; case TIOCGWINSZ: return "TIOCGWINSZ"; case TIOCSWINSZ: return "TIOCSWINSZ"; case TIOCMGET: return "TIOCMGET"; case TIOCMSET: return "TIOCMSET"; case TIOCMBIS: return "TIOCMBIS"; case TIOCMBIC: return "TIOCMBIC"; /* from digi.h */ case DIGI_SETA: return "DIGI_SETA"; case DIGI_SETAW: return "DIGI_SETAW"; case DIGI_SETAF: return "DIGI_SETAF"; case DIGI_SETFLOW: return "DIGI_SETFLOW"; case DIGI_SETAFLOW: return "DIGI_SETAFLOW"; case DIGI_GETFLOW: return "DIGI_GETFLOW"; case DIGI_GETAFLOW: return "DIGI_GETAFLOW"; case DIGI_GETA: return "DIGI_GETA"; case DIGI_GEDELAY: return "DIGI_GEDELAY"; case DIGI_SEDELAY: return "DIGI_SEDELAY"; case DIGI_GETCUSTOMBAUD: return "DIGI_GETCUSTOMBAUD"; case DIGI_SETCUSTOMBAUD: return "DIGI_SETCUSTOMBAUD"; case TIOCMODG: return "TIOCMODG"; case TIOCMODS: return "TIOCMODS"; case TIOCSDTR: return "TIOCSDTR"; case TIOCCDTR: return "TIOCCDTR"; default: return "unknown"; } }