diff options
Diffstat (limited to 'drivers/staging/dgnc/dgnc_driver.c')
| -rw-r--r-- | drivers/staging/dgnc/dgnc_driver.c | 958 |
1 files changed, 958 insertions, 0 deletions
diff --git a/drivers/staging/dgnc/dgnc_driver.c b/drivers/staging/dgnc/dgnc_driver.c new file mode 100644 index 000000000000..f8c1e22585d6 --- /dev/null +++ b/drivers/staging/dgnc/dgnc_driver.c @@ -0,0 +1,958 @@ +/* + * Copyright 2003 Digi International (www.digi.com) + * Scott H Kilau <Scott_Kilau at digi dot com> + * + * 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 <linux/kernel.h> +#include <linux/version.h> +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/slab.h> + +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39) +#include <linux/sched.h> +#endif + +#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 board_t *brd); +static void dgnc_init_globals(void); +static int dgnc_found_board(struct pci_dev *pdev, int id); +static void dgnc_cleanup_board(struct board_t *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 board_t *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 board_t *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"); +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28) + device_create_drvdata(dgnc_class, NULL, + MKDEV(dgnc_Major, 0), + NULL, "dgnc_mgmt"); +#else + device_create(dgnc_class, NULL, + MKDEV(dgnc_Major, 0), + NULL, "dgnc_mgmt"); +#endif + + 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 board_t *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(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 board_t *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] = + (struct board_t *) kzalloc(sizeof(struct board_t), GFP_KERNEL); + if (!brd) { + APR(("memory allocation for board structure failed\n")); + return(-ENOMEM); + } + + /* make a temporary message buffer for the boot messages */ + brd->msgbuf = brd->msgbuf_head = + (char *) kzalloc(sizeof(char) * 8192, GFP_KERNEL); + if (!brd->msgbuf) { + kfree(brd); + APR(("memory allocation for board msgbuf failed\n")); + 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(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 board_t *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 board_t *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 board_t *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"); + } +} |