730 lines
16 KiB
C
730 lines
16 KiB
C
/*
|
|
* 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.
|
|
*/
|
|
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/sched.h>
|
|
#include "dgnc_driver.h"
|
|
#include "dgnc_pci.h"
|
|
#include "dgnc_mgmt.h"
|
|
#include "dgnc_tty.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");
|
|
|
|
/**************************************************************************
|
|
*
|
|
* 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_one(struct pci_dev *pdev,
|
|
const struct pci_device_id *ent);
|
|
static void dgnc_do_remap(struct dgnc_board *brd);
|
|
|
|
/*
|
|
* File operations permitted on Control/Management major.
|
|
*/
|
|
static const 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);
|
|
uint dgnc_Major;
|
|
int dgnc_poll_tick = 20; /* Poll interval - 20 ms */
|
|
|
|
/*
|
|
* Static vars.
|
|
*/
|
|
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 const struct pci_device_id dgnc_pci_tbl[] = {
|
|
{PCI_DEVICE(DIGI_VID, PCI_DEVICE_CLASSIC_4_DID), .driver_data = 0},
|
|
{PCI_DEVICE(DIGI_VID, PCI_DEVICE_CLASSIC_4_422_DID), .driver_data = 1},
|
|
{PCI_DEVICE(DIGI_VID, PCI_DEVICE_CLASSIC_8_DID), .driver_data = 2},
|
|
{PCI_DEVICE(DIGI_VID, PCI_DEVICE_CLASSIC_8_422_DID), .driver_data = 3},
|
|
{0,}
|
|
};
|
|
MODULE_DEVICE_TABLE(pci, dgnc_pci_tbl);
|
|
|
|
struct board_id {
|
|
unsigned char *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,
|
|
};
|
|
|
|
/************************************************************************
|
|
*
|
|
* Driver load/unload functions
|
|
*
|
|
************************************************************************/
|
|
|
|
/*
|
|
* dgnc_cleanup_module()
|
|
*
|
|
* Module unload. This is where it all ends.
|
|
*/
|
|
static void dgnc_cleanup_module(void)
|
|
{
|
|
int i;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&dgnc_poll_lock, flags);
|
|
dgnc_poll_stop = 1;
|
|
spin_unlock_irqrestore(&dgnc_poll_lock, flags);
|
|
|
|
/* Turn off poller right away. */
|
|
del_timer_sync(&dgnc_poll_timer);
|
|
|
|
dgnc_remove_driver_sysfiles(&dgnc_driver);
|
|
|
|
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 (dgnc_NumBoards)
|
|
pci_unregister_driver(&dgnc_driver);
|
|
}
|
|
|
|
/*
|
|
* init_module()
|
|
*
|
|
* Module load. This is where it all starts.
|
|
*/
|
|
static int __init dgnc_init_module(void)
|
|
{
|
|
int rc = 0;
|
|
|
|
/*
|
|
* Initialize global stuff
|
|
*/
|
|
rc = dgnc_start();
|
|
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
/*
|
|
* Find and configure all the cards
|
|
*/
|
|
rc = pci_register_driver(&dgnc_driver);
|
|
|
|
/*
|
|
* If something went wrong in the scan, bail out of driver.
|
|
*/
|
|
if (rc < 0) {
|
|
/* Only unregister if it was actually registered. */
|
|
if (dgnc_NumBoards)
|
|
pci_unregister_driver(&dgnc_driver);
|
|
else
|
|
pr_warn("WARNING: dgnc driver load failed. No Digi Neo or Classic boards found.\n");
|
|
|
|
dgnc_cleanup_module();
|
|
} else {
|
|
dgnc_create_driver_sysfiles(&dgnc_driver);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
module_init(dgnc_init_module);
|
|
module_exit(dgnc_cleanup_module);
|
|
|
|
/*
|
|
* Start of driver.
|
|
*/
|
|
static int dgnc_start(void)
|
|
{
|
|
int rc = 0;
|
|
unsigned long flags;
|
|
struct device *dev;
|
|
|
|
/* make sure that the globals are init'd before we do anything else */
|
|
dgnc_init_globals();
|
|
|
|
/*
|
|
* 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.
|
|
*
|
|
* Register management/dpa devices
|
|
*/
|
|
rc = register_chrdev(0, "dgnc", &dgnc_BoardFops);
|
|
if (rc < 0) {
|
|
pr_err(DRVSTR ": Can't register dgnc driver device (%d)\n", rc);
|
|
return rc;
|
|
}
|
|
dgnc_Major = rc;
|
|
|
|
dgnc_class = class_create(THIS_MODULE, "dgnc_mgmt");
|
|
if (IS_ERR(dgnc_class)) {
|
|
rc = PTR_ERR(dgnc_class);
|
|
pr_err(DRVSTR ": Can't create dgnc_mgmt class (%d)\n", rc);
|
|
goto failed_class;
|
|
}
|
|
|
|
dev = device_create(dgnc_class, NULL,
|
|
MKDEV(dgnc_Major, 0),
|
|
NULL, "dgnc_mgmt");
|
|
if (IS_ERR(dev)) {
|
|
rc = PTR_ERR(dev);
|
|
pr_err(DRVSTR ": Can't create device (%d)\n", rc);
|
|
goto failed_device;
|
|
}
|
|
|
|
/*
|
|
* Init any global tty stuff.
|
|
*/
|
|
rc = dgnc_tty_preinit();
|
|
|
|
if (rc < 0) {
|
|
pr_err(DRVSTR ": tty preinit - not enough memory (%d)\n", rc);
|
|
goto failed_tty;
|
|
}
|
|
|
|
/* Start the poller */
|
|
spin_lock_irqsave(&dgnc_poll_lock, flags);
|
|
setup_timer(&dgnc_poll_timer, dgnc_poll_handler, 0);
|
|
dgnc_poll_time = jiffies + dgnc_jiffies_from_ms(dgnc_poll_tick);
|
|
dgnc_poll_timer.expires = dgnc_poll_time;
|
|
spin_unlock_irqrestore(&dgnc_poll_lock, flags);
|
|
|
|
add_timer(&dgnc_poll_timer);
|
|
|
|
return 0;
|
|
|
|
failed_tty:
|
|
device_destroy(dgnc_class, MKDEV(dgnc_Major, 0));
|
|
failed_device:
|
|
class_destroy(dgnc_class);
|
|
failed_class:
|
|
unregister_chrdev(dgnc_Major, "dgnc");
|
|
return rc;
|
|
}
|
|
|
|
/* 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_found_board(pdev, ent->driver_data);
|
|
if (rc == 0)
|
|
dgnc_NumBoards++;
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
|
|
spin_lock_irqsave(&dgnc_global_lock, flags);
|
|
brd->msgbuf = NULL;
|
|
dev_dbg(&brd->pdev->dev, "%s\n", brd->msgbuf_head);
|
|
kfree(brd->msgbuf_head);
|
|
brd->msgbuf_head = NULL;
|
|
spin_unlock_irqrestore(&dgnc_global_lock, flags);
|
|
}
|
|
|
|
/* Free all allocated channels structs */
|
|
for (i = 0; i < MAXPORTS ; i++) {
|
|
if (brd->channels[i]) {
|
|
kfree(brd->channels[i]->ch_rqueue);
|
|
kfree(brd->channels[i]->ch_equeue);
|
|
kfree(brd->channels[i]->ch_wqueue);
|
|
kfree(brd->channels[i]);
|
|
brd->channels[i] = NULL;
|
|
}
|
|
}
|
|
|
|
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 */
|
|
dgnc_Board[dgnc_NumBoards] = kzalloc(sizeof(*brd), GFP_KERNEL);
|
|
brd = dgnc_Board[dgnc_NumBoards];
|
|
|
|
if (!brd)
|
|
return -ENOMEM;
|
|
|
|
/* make a temporary message buffer for the boot messages */
|
|
brd->msgbuf_head = kcalloc(8192, sizeof(u8), GFP_KERNEL);
|
|
brd->msgbuf = brd->msgbuf_head;
|
|
|
|
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);
|
|
|
|
spin_lock_init(&brd->bd_lock);
|
|
spin_lock_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;
|
|
|
|
/*
|
|
* 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) {
|
|
dev_err(&brd->pdev->dev,
|
|
"Card has no PCI IO resources, failing.\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;
|
|
|
|
/* 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) {
|
|
|
|
/* Read and store the dvid after remapping */
|
|
brd->dvid = readb(brd->re_map_membase + 0x8D);
|
|
|
|
/* Get and store the board VPD, if it exists */
|
|
brd->bd_ops->vpd(brd);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
dev_err(&brd->pdev->dev,
|
|
"Didn't find any compatible Neo/Classic PCI boards.\n");
|
|
return -ENXIO;
|
|
|
|
}
|
|
|
|
/*
|
|
* Do tty device initialization.
|
|
*/
|
|
|
|
rc = dgnc_tty_register(brd);
|
|
if (rc < 0) {
|
|
pr_err(DRVSTR ": Can't register tty devices (%d)\n", rc);
|
|
goto failed;
|
|
}
|
|
|
|
rc = dgnc_finalize_board_init(brd);
|
|
if (rc < 0) {
|
|
pr_err(DRVSTR ": Can't finalize board init (%d)\n", rc);
|
|
goto failed;
|
|
}
|
|
|
|
rc = dgnc_tty_init(brd);
|
|
if (rc < 0) {
|
|
pr_err(DRVSTR ": Can't init tty devices (%d)\n", rc);
|
|
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);
|
|
|
|
spin_lock_irqsave(&dgnc_global_lock, flags);
|
|
brd->msgbuf = NULL;
|
|
dev_dbg(&brd->pdev->dev, "%s\n", brd->msgbuf_head);
|
|
kfree(brd->msgbuf_head);
|
|
brd->msgbuf_head = NULL;
|
|
spin_unlock_irqrestore(&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:
|
|
dgnc_tty_uninit(brd);
|
|
brd->state = BOARD_FAILED;
|
|
brd->dpastatus = BD_NOFEP;
|
|
|
|
return -ENXIO;
|
|
|
|
}
|
|
|
|
|
|
static int dgnc_finalize_board_init(struct dgnc_board *brd)
|
|
{
|
|
int rc = 0;
|
|
|
|
if (!brd || brd->magic != DGNC_BOARD_MAGIC)
|
|
return -ENODEV;
|
|
|
|
if (brd->irq) {
|
|
rc = request_irq(brd->irq, brd->bd_ops->intr,
|
|
IRQF_SHARED, "DGNC", brd);
|
|
|
|
if (rc) {
|
|
dev_err(&brd->pdev->dev,
|
|
"Failed to hook IRQ %d\n", brd->irq);
|
|
brd->state = BOARD_FAILED;
|
|
brd->dpastatus = BD_NOFEP;
|
|
rc = -ENODEV;
|
|
}
|
|
}
|
|
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);
|
|
}
|
|
|
|
|
|
/*****************************************************************************
|
|
*
|
|
* 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 flags;
|
|
int i;
|
|
unsigned long new_time;
|
|
|
|
/* Go thru each board, kicking off a tasklet for each if needed */
|
|
for (i = 0; i < dgnc_NumBoards; i++) {
|
|
brd = dgnc_Board[i];
|
|
|
|
spin_lock_irqsave(&brd->bd_lock, flags);
|
|
|
|
/* If board is in a failed state don't schedule a tasklet */
|
|
if (brd->state == BOARD_FAILED) {
|
|
spin_unlock_irqrestore(&brd->bd_lock, flags);
|
|
continue;
|
|
}
|
|
|
|
/* Schedule a poll helper task */
|
|
tasklet_schedule(&brd->helper_tasklet);
|
|
|
|
spin_unlock_irqrestore(&brd->bd_lock, flags);
|
|
}
|
|
|
|
/*
|
|
* Schedule ourself back at the nominal wakeup interval.
|
|
*/
|
|
spin_lock_irqsave(&dgnc_poll_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);
|
|
|
|
setup_timer(&dgnc_poll_timer, dgnc_poll_handler, 0);
|
|
dgnc_poll_timer.expires = dgnc_poll_time;
|
|
spin_unlock_irqrestore(&dgnc_poll_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_NumBoards = 0;
|
|
|
|
for (i = 0; i < MAXBOARDS; i++)
|
|
dgnc_Board[i] = NULL;
|
|
|
|
init_timer(&dgnc_poll_timer);
|
|
}
|
|
|