405 lines
9.7 KiB
C
405 lines
9.7 KiB
C
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/************************************************************************
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* Copyright 2003 Digi International (www.digi.com)
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*
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* Copyright (C) 2004 IBM Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 * Temple Place - Suite 330, Boston,
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* MA 02111-1307, USA.
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*
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* Contact Information:
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* Scott H Kilau <Scott_Kilau@digi.com>
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* Wendy Xiong <wendyx@us.ltcfwd.linux.ibm.com>
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*
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***********************************************************************/
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#include <linux/moduleparam.h>
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#include <linux/pci.h>
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#include "jsm.h"
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MODULE_AUTHOR("Digi International, http://www.digi.com");
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MODULE_DESCRIPTION("Driver for the Digi International Neo PCI based product line");
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MODULE_SUPPORTED_DEVICE("jsm");
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#define JSM_DRIVER_NAME "jsm"
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#define NR_PORTS 32
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#define JSM_MINOR_START 0
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struct uart_driver jsm_uart_driver = {
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.owner = THIS_MODULE,
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.driver_name = JSM_DRIVER_NAME,
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.dev_name = "ttyn",
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.major = 253,
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.minor = JSM_MINOR_START,
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.nr = NR_PORTS,
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.cons = NULL,
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};
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int jsm_debug;
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int jsm_rawreadok;
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module_param(jsm_debug, int, 0);
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module_param(jsm_rawreadok, int, 0);
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MODULE_PARM_DESC(jsm_debug, "Driver debugging level");
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MODULE_PARM_DESC(jsm_rawreadok, "Bypass flip buffers on input");
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/*
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* Globals
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*/
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int jsm_driver_state = DRIVER_INITIALIZED;
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spinlock_t jsm_board_head_lock = SPIN_LOCK_UNLOCKED;
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LIST_HEAD(jsm_board_head);
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static struct pci_device_id jsm_pci_tbl[] = {
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{ PCI_DEVICE (PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9), 0, 0, 0 },
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{ PCI_DEVICE (PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9PRI), 0, 0, 1 },
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{ PCI_DEVICE (PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45), 0, 0, 2 },
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{ PCI_DEVICE (PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45PRI), 0, 0, 3 },
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{ 0,} /* 0 terminated list. */
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};
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MODULE_DEVICE_TABLE(pci, jsm_pci_tbl);
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static struct board_id jsm_Ids[] = {
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{ PCI_DEVICE_NEO_2DB9_PCI_NAME, 2 },
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{ PCI_DEVICE_NEO_2DB9PRI_PCI_NAME, 2 },
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{ PCI_DEVICE_NEO_2RJ45_PCI_NAME, 2 },
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{ PCI_DEVICE_NEO_2RJ45PRI_PCI_NAME, 2 },
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{ NULL, 0 }
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};
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char *jsm_driver_state_text[] = {
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"Driver Initialized",
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"Driver Ready."
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};
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static int jsm_finalize_board_init(struct jsm_board *brd)
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{
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int rc = 0;
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jsm_printk(INIT, INFO, &brd->pci_dev, "start\n");
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if (brd->irq) {
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rc = request_irq(brd->irq, brd->bd_ops->intr, SA_INTERRUPT|SA_SHIRQ, "JSM", brd);
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if (rc) {
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printk(KERN_WARNING "Failed to hook IRQ %d\n",brd->irq);
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brd->state = BOARD_FAILED;
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brd->dpastatus = BD_NOFEP;
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rc = -ENODEV;
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} else
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jsm_printk(INIT, INFO, &brd->pci_dev,
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"Requested and received usage of IRQ %d\n", brd->irq);
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}
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return rc;
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}
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/*
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* jsm_found_board()
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*
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* A board has been found, init it.
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*/
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static int jsm_found_board(struct pci_dev *pdev, int id)
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{
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struct jsm_board *brd;
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int i = 0;
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int rc = 0;
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struct list_head *tmp;
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struct jsm_board *cur_board_entry;
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unsigned long lock_flags;
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int adapter_count = 0;
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int retval;
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brd = kmalloc(sizeof(struct jsm_board), GFP_KERNEL);
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if (!brd) {
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dev_err(&pdev->dev, "memory allocation for board structure failed\n");
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return -ENOMEM;
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}
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memset(brd, 0, sizeof(struct jsm_board));
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spin_lock_irqsave(&jsm_board_head_lock, lock_flags);
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list_for_each(tmp, &jsm_board_head) {
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cur_board_entry =
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list_entry(tmp, struct jsm_board,
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jsm_board_entry);
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if (cur_board_entry->boardnum != adapter_count) {
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break;
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}
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adapter_count++;
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}
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list_add_tail(&brd->jsm_board_entry, &jsm_board_head);
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spin_unlock_irqrestore(&jsm_board_head_lock, lock_flags);
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/* store the info for the board we've found */
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brd->boardnum = adapter_count;
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brd->pci_dev = pdev;
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brd->name = jsm_Ids[id].name;
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brd->maxports = jsm_Ids[id].maxports;
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brd->dpastatus = BD_NOFEP;
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init_waitqueue_head(&brd->state_wait);
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spin_lock_init(&brd->bd_lock);
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spin_lock_init(&brd->bd_intr_lock);
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brd->state = BOARD_FOUND;
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for (i = 0; i < brd->maxports; i++)
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brd->channels[i] = NULL;
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/* store which revision we have */
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pci_read_config_byte(pdev, PCI_REVISION_ID, &brd->rev);
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brd->irq = pdev->irq;
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switch(brd->pci_dev->device) {
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case PCI_DEVICE_ID_NEO_2DB9:
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case PCI_DEVICE_ID_NEO_2DB9PRI:
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case PCI_DEVICE_ID_NEO_2RJ45:
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case PCI_DEVICE_ID_NEO_2RJ45PRI:
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/*
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* This chip is set up 100% when we get to it.
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* No need to enable global interrupts or anything.
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*/
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brd->dpatype = T_NEO | T_PCIBUS;
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jsm_printk(INIT, INFO, &brd->pci_dev,
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"jsm_found_board - NEO adapter\n");
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/* get the PCI Base Address Registers */
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brd->membase = pci_resource_start(pdev, 0);
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brd->membase_end = pci_resource_end(pdev, 0);
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if (brd->membase & 1)
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brd->membase &= ~3;
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else
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brd->membase &= ~15;
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/* Assign the board_ops struct */
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brd->bd_ops = &jsm_neo_ops;
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brd->bd_uart_offset = 0x200;
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brd->bd_dividend = 921600;
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brd->re_map_membase = ioremap(brd->membase, 0x1000);
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jsm_printk(INIT, INFO, &brd->pci_dev,
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"remapped mem: 0x%p\n", brd->re_map_membase);
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if (!brd->re_map_membase) {
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kfree(brd);
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dev_err(&pdev->dev, "card has no PCI Memory resources, failing board.\n");
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return -ENOMEM;
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}
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break;
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default:
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dev_err(&pdev->dev, "Did not find any compatible Neo or Classic PCI boards in system.\n");
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kfree(brd);
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return -ENXIO;
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}
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/*
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* Do tty device initialization.
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*/
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rc = jsm_finalize_board_init(brd);
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if (rc < 0) {
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dev_err(&pdev->dev, "Can't finalize board init (%d)\n", rc);
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brd->state = BOARD_FAILED;
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retval = -ENXIO;
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goto failed0;
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}
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rc = jsm_tty_init(brd);
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if (rc < 0) {
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dev_err(&pdev->dev, "Can't init tty devices (%d)\n", rc);
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brd->state = BOARD_FAILED;
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retval = -ENXIO;
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goto failed1;
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}
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rc = jsm_uart_port_init(brd);
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if (rc < 0) {
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dev_err(&pdev->dev, "Can't init uart port (%d)\n", rc);
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brd->state = BOARD_FAILED;
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retval = -ENXIO;
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goto failed1;
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}
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brd->state = BOARD_READY;
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brd->dpastatus = BD_RUNNING;
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/* Log the information about the board */
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dev_info(&pdev->dev, "board %d: %s (rev %d), irq %d\n",adapter_count, brd->name, brd->rev, brd->irq);
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/*
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* allocate flip buffer for board.
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*
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* Okay to malloc with GFP_KERNEL, we are not at interrupt
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* context, and there are no locks held.
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*/
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brd->flipbuf = kmalloc(MYFLIPLEN, GFP_KERNEL);
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if (!brd->flipbuf) {
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dev_err(&pdev->dev, "memory allocation for flipbuf failed\n");
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brd->state = BOARD_FAILED;
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retval = -ENOMEM;
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goto failed1;
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}
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memset(brd->flipbuf, 0, MYFLIPLEN);
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jsm_create_driver_sysfiles(pdev->dev.driver);
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wake_up_interruptible(&brd->state_wait);
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return 0;
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failed1:
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free_irq(brd->irq, brd);
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failed0:
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kfree(brd);
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iounmap(brd->re_map_membase);
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return retval;
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}
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/* returns count (>= 0), or negative on error */
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static int jsm_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
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{
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int rc;
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rc = pci_enable_device(pdev);
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if (rc) {
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dev_err(&pdev->dev, "Device enable FAILED\n");
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return rc;
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}
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if ((rc = pci_request_regions(pdev, "jsm"))) {
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dev_err(&pdev->dev, "pci_request_region FAILED\n");
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pci_disable_device(pdev);
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return rc;
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}
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if ((rc = jsm_found_board(pdev, ent->driver_data))) {
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dev_err(&pdev->dev, "jsm_found_board FAILED\n");
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pci_release_regions(pdev);
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pci_disable_device(pdev);
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return rc;
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}
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return rc;
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}
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/*
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* jsm_cleanup_board()
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*
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* Free all the memory associated with a board
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*/
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static void jsm_cleanup_board(struct jsm_board *brd)
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{
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int i = 0;
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free_irq(brd->irq, brd);
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iounmap(brd->re_map_membase);
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/* Free all allocated channels structs */
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for (i = 0; i < brd->maxports; i++) {
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if (brd->channels[i]) {
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if (brd->channels[i]->ch_rqueue)
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kfree(brd->channels[i]->ch_rqueue);
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if (brd->channels[i]->ch_equeue)
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kfree(brd->channels[i]->ch_equeue);
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if (brd->channels[i]->ch_wqueue)
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kfree(brd->channels[i]->ch_wqueue);
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kfree(brd->channels[i]);
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}
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}
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pci_release_regions(brd->pci_dev);
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pci_disable_device(brd->pci_dev);
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kfree(brd->flipbuf);
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kfree(brd);
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}
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static void jsm_remove_one(struct pci_dev *dev)
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{
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unsigned long lock_flags;
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struct list_head *tmp;
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struct jsm_board *brd;
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spin_lock_irqsave(&jsm_board_head_lock, lock_flags);
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list_for_each(tmp, &jsm_board_head) {
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brd = list_entry(tmp, struct jsm_board,
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jsm_board_entry);
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if ( brd != NULL && brd->pci_dev == dev) {
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jsm_remove_uart_port(brd);
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jsm_cleanup_board(brd);
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list_del(&brd->jsm_board_entry);
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break;
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}
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}
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spin_unlock_irqrestore(&jsm_board_head_lock, lock_flags);
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return;
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}
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struct pci_driver jsm_driver = {
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.name = "jsm",
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.probe = jsm_init_one,
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.id_table = jsm_pci_tbl,
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.remove = __devexit_p(jsm_remove_one),
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};
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/*
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* jsm_init_module()
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*
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* Module load. This is where it all starts.
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*/
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static int __init jsm_init_module(void)
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{
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int rc = 0;
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printk(KERN_INFO "%s, Digi International Part Number %s\n",
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JSM_VERSION, JSM_VERSION);
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/*
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* Initialize global stuff
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*/
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rc = uart_register_driver(&jsm_uart_driver);
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if (rc < 0) {
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return rc;
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}
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rc = pci_register_driver(&jsm_driver);
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if (rc < 0) {
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uart_unregister_driver(&jsm_uart_driver);
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return rc;
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}
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jsm_driver_state = DRIVER_READY;
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return rc;
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}
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module_init(jsm_init_module);
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/*
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* jsm_exit_module()
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*
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* Module unload. This is where it all ends.
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*/
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static void __exit jsm_exit_module(void)
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{
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jsm_remove_driver_sysfiles(&jsm_driver.driver);
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pci_unregister_driver(&jsm_driver);
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uart_unregister_driver(&jsm_uart_driver);
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}
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module_exit(jsm_exit_module);
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MODULE_LICENSE("GPL");
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