drivers/serial/jsm/jsm_driver.c

   1 /************************************************************************
   2  * Copyright 2003 Digi International (www.digi.com)
   3  *
   4  * Copyright (C) 2004 IBM Corporation. All rights reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2, or (at your option)
   9  * any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
  13  * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  14  * PURPOSE.  See the GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 * Temple Place - Suite 330, Boston,
  19  * MA  02111-1307, USA.
  20  *
  21  * Contact Information:
  22  * Scott H Kilau <Scott_Kilau@digi.com>
  23  * Wendy Xiong   <wendyx@us.ibm.com>
  24  *
  25  *
  26  ***********************************************************************/
  27 #include <linux/moduleparam.h>
  28 #include <linux/pci.h>
  29
  30 #include "jsm.h"
  31
  32 MODULE_AUTHOR("Digi International, http://www.digi.com");
  33 MODULE_DESCRIPTION("Driver for the Digi International "
  34                    "Neo PCI based product line");
  35 MODULE_LICENSE("GPL");
  36 MODULE_SUPPORTED_DEVICE("jsm");
  37
  38 #define JSM_DRIVER_NAME "jsm"
  39 #define NR_PORTS        32
  40 #define JSM_MINOR_START 0
  41
  42 struct uart_driver jsm_uart_driver = {
  43         .owner          = THIS_MODULE,
  44         .driver_name    = JSM_DRIVER_NAME,
  45         .dev_name       = "ttyn",
  46         .major          = 0,
  47         .minor          = JSM_MINOR_START,
  48         .nr             = NR_PORTS,
  49 };
  50
  51 int jsm_debug;
  52 module_param(jsm_debug, int, 0);
  53 MODULE_PARM_DESC(jsm_debug, "Driver debugging level");
  54
  55 static int jsm_probe_one(struct pci_dev *pdev, const struct pci_device_id *ent)
  56 {
  57         int rc = 0;
  58         struct jsm_board *brd;
  59         static int adapter_count = 0;
  60         int retval;
  61
  62         rc = pci_enable_device(pdev);
  63         if (rc) {
  64                 dev_err(&pdev->dev, "Device enable FAILED\n");
  65                 goto out;
  66         }
  67
  68         rc = pci_request_regions(pdev, "jsm");
  69         if (rc) {
  70                 dev_err(&pdev->dev, "pci_request_region FAILED\n");
  71                 goto out_disable_device;
  72         }
  73
  74         brd = kzalloc(sizeof(struct jsm_board), GFP_KERNEL);
  75         if (!brd) {
  76                 dev_err(&pdev->dev,
  77                         "memory allocation for board structure failed\n");
  78                 rc = -ENOMEM;
  79                 goto out_release_regions;
  80         }
  81
  82         /* store the info for the board we've found */
  83         brd->boardnum = adapter_count++;
  84         brd->pci_dev = pdev;
  85         brd->maxports = 2;
  86
  87         spin_lock_init(&brd->bd_lock);
  88         spin_lock_init(&brd->bd_intr_lock);
  89
  90         /* store which revision we have */
  91         pci_read_config_byte(pdev, PCI_REVISION_ID, &brd->rev);
  92
  93         brd->irq = pdev->irq;
  94
  95         jsm_printk(INIT, INFO, &brd->pci_dev,
  96                 "jsm_found_board - NEO adapter\n");
  97
  98         /* get the PCI Base Address Registers */
  99         brd->membase    = pci_resource_start(pdev, 0);
 100         brd->membase_end = pci_resource_end(pdev, 0);
 101
 102         if (brd->membase & 1)
 103                 brd->membase &= ~3;
 104         else
 105                 brd->membase &= ~15;
 106
 107         /* Assign the board_ops struct */
 108         brd->bd_ops = &jsm_neo_ops;
 109
 110         brd->bd_uart_offset = 0x200;
 111         brd->bd_dividend = 921600;
 112
 113         brd->re_map_membase = ioremap(brd->membase, 0x1000);
 114         if (!brd->re_map_membase) {
 115                 dev_err(&pdev->dev,
 116                         "card has no PCI Memory resources, "
 117                         "failing board.\n");
 118                 rc = -ENOMEM;
 119                 goto out_kfree_brd;
 120         }
 121
 122         rc = request_irq(brd->irq, brd->bd_ops->intr,
 123                         IRQF_DISABLED|IRQF_SHARED, "JSM", brd);
 124         if (rc) {
 125                 printk(KERN_WARNING "Failed to hook IRQ %d\n",brd->irq);
 126                 goto out_iounmap;
 127         }
 128
 129         rc = jsm_tty_init(brd);
 130         if (rc < 0) {
 131                 dev_err(&pdev->dev, "Can't init tty devices (%d)\n", rc);
 132                 retval = -ENXIO;
 133                 goto out_free_irq;
 134         }
 135
 136         rc = jsm_uart_port_init(brd);
 137         if (rc < 0) {
 138                 /* XXX: leaking all resources from jsm_tty_init here! */
 139                 dev_err(&pdev->dev, "Can't init uart port (%d)\n", rc);
 140                 retval = -ENXIO;
 141                 goto out_free_irq;
 142         }
 143
 144         /* Log the information about the board */
 145         dev_info(&pdev->dev, "board %d: Digi Neo (rev %d), irq %d\n",
 146                         adapter_count, brd->rev, brd->irq);
 147
 148         /*
 149          * allocate flip buffer for board.
 150          *
 151          * Okay to malloc with GFP_KERNEL, we are not at interrupt
 152          * context, and there are no locks held.
 153          */
 154         brd->flipbuf = kzalloc(MYFLIPLEN, GFP_KERNEL);
 155         if (!brd->flipbuf) {
 156                 /* XXX: leaking all resources from jsm_tty_init and
 157                         jsm_uart_port_init here! */
 158                 dev_err(&pdev->dev, "memory allocation for flipbuf failed\n");
 159                 retval = -ENOMEM;
 160                 goto out_free_irq;
 161         }
 162
 163         pci_set_drvdata(pdev, brd);
 164
 165         return 0;
 166  out_free_irq:
 167         free_irq(brd->irq, brd);
 168  out_iounmap:
 169         iounmap(brd->re_map_membase);
 170  out_kfree_brd:
 171         kfree(brd);
 172  out_release_regions:
 173         pci_release_regions(pdev);
 174  out_disable_device:
 175         pci_disable_device(pdev);
 176  out:
 177         return rc;
 178 }
 179
 180 static void jsm_remove_one(struct pci_dev *pdev)
 181 {
 182         struct jsm_board *brd = pci_get_drvdata(pdev);
 183         int i = 0;
 184
 185         jsm_remove_uart_port(brd);
 186
 187         free_irq(brd->irq, brd);
 188         iounmap(brd->re_map_membase);
 189
 190         /* Free all allocated channels structs */
 191         for (i = 0; i < brd->maxports; i++) {
 192                 if (brd->channels[i]) {
 193                         kfree(brd->channels[i]->ch_rqueue);
 194                         kfree(brd->channels[i]->ch_equeue);
 195                         kfree(brd->channels[i]->ch_wqueue);
 196                         kfree(brd->channels[i]);
 197                 }
 198         }
 199
 200         pci_release_regions(pdev);
 201         pci_disable_device(pdev);
 202         kfree(brd->flipbuf);
 203         kfree(brd);
 204 }
 205
 206 static struct pci_device_id jsm_pci_tbl[] = {
 207         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9), 0, 0, 0 },
 208         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9PRI), 0, 0, 1 },
 209         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45), 0, 0, 2 },
 210         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45PRI), 0, 0, 3 },
 211         { 0, }
 212 };
 213 MODULE_DEVICE_TABLE(pci, jsm_pci_tbl);
 214
 215 static struct pci_driver jsm_driver = {
 216         .name           = "jsm",
 217         .id_table       = jsm_pci_tbl,
 218         .probe          = jsm_probe_one,
 219         .remove         = __devexit_p(jsm_remove_one),
 220 };
 221
 222 static int __init jsm_init_module(void)
 223 {
 224         int rc;
 225
 226         rc = uart_register_driver(&jsm_uart_driver);
 227         if (!rc) {
 228                 rc = pci_register_driver(&jsm_driver);
 229                 if (rc)
 230                         uart_unregister_driver(&jsm_uart_driver);
 231         }
 232         return rc;
 233 }
 234
 235 static void __exit jsm_exit_module(void)
 236 {
 237         pci_unregister_driver(&jsm_driver);
 238         uart_unregister_driver(&jsm_uart_driver);
 239 }
 240
 241 module_init(jsm_init_module);
 242 module_exit(jsm_exit_module);