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.ltcfwd.linux.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 int jsm_rawreadok;
  53 module_param(jsm_debug, int, 0);
  54 module_param(jsm_rawreadok, int, 0);
  55 MODULE_PARM_DESC(jsm_debug, "Driver debugging level");
  56 MODULE_PARM_DESC(jsm_rawreadok, "Bypass flip buffers on input");
  57
  58 static int jsm_probe_one(struct pci_dev *pdev, const struct pci_device_id *ent)
  59 {
  60         int rc = 0;
  61         struct jsm_board *brd;
  62         static int adapter_count = 0;
  63         int retval;
  64
  65         rc = pci_enable_device(pdev);
  66         if (rc) {
  67                 dev_err(&pdev->dev, "Device enable FAILED\n");
  68                 goto out;
  69         }
  70
  71         rc = pci_request_regions(pdev, "jsm");
  72         if (rc) {
  73                 dev_err(&pdev->dev, "pci_request_region FAILED\n");
  74                 goto out_disable_device;
  75         }
  76
  77         brd = kmalloc(sizeof(struct jsm_board), GFP_KERNEL);
  78         if (!brd) {
  79                 dev_err(&pdev->dev,
  80                         "memory allocation for board structure failed\n");
  81                 rc = -ENOMEM;
  82                 goto out_release_regions;
  83         }
  84         memset(brd, 0, sizeof(struct jsm_board));
  85
  86         /* store the info for the board we've found */
  87         brd->boardnum = adapter_count++;
  88         brd->pci_dev = pdev;
  89         brd->maxports = 2;
  90
  91         spin_lock_init(&brd->bd_lock);
  92         spin_lock_init(&brd->bd_intr_lock);
  93
  94         /* store which revision we have */
  95         pci_read_config_byte(pdev, PCI_REVISION_ID, &brd->rev);
  96
  97         brd->irq = pdev->irq;
  98
  99         jsm_printk(INIT, INFO, &brd->pci_dev,
 100                 "jsm_found_board - NEO adapter\n");
 101
 102         /* get the PCI Base Address Registers */
 103         brd->membase    = pci_resource_start(pdev, 0);
 104         brd->membase_end = pci_resource_end(pdev, 0);
 105
 106         if (brd->membase & 1)
 107                 brd->membase &= ~3;
 108         else
 109                 brd->membase &= ~15;
 110
 111         /* Assign the board_ops struct */
 112         brd->bd_ops = &jsm_neo_ops;
 113
 114         brd->bd_uart_offset = 0x200;
 115         brd->bd_dividend = 921600;
 116
 117         brd->re_map_membase = ioremap(brd->membase, 0x1000);
 118         if (!brd->re_map_membase) {
 119                 dev_err(&pdev->dev,
 120                         "card has no PCI Memory resources, "
 121                         "failing board.\n");
 122                 rc = -ENOMEM;
 123                 goto out_kfree_brd;
 124         }
 125
 126         rc = request_irq(brd->irq, brd->bd_ops->intr,
 127                         SA_INTERRUPT|SA_SHIRQ, "JSM", brd);
 128         if (rc) {
 129                 printk(KERN_WARNING "Failed to hook IRQ %d\n",brd->irq);
 130                 goto out_iounmap;
 131         }
 132
 133         rc = jsm_tty_init(brd);
 134         if (rc < 0) {
 135                 dev_err(&pdev->dev, "Can't init tty devices (%d)\n", rc);
 136                 retval = -ENXIO;
 137                 goto out_free_irq;
 138         }
 139
 140         rc = jsm_uart_port_init(brd);
 141         if (rc < 0) {
 142                 /* XXX: leaking all resources from jsm_tty_init here! */
 143                 dev_err(&pdev->dev, "Can't init uart port (%d)\n", rc);
 144                 retval = -ENXIO;
 145                 goto out_free_irq;
 146         }
 147
 148         /* Log the information about the board */
 149         dev_info(&pdev->dev, "board %d: Digi Neo (rev %d), irq %d\n",
 150                         adapter_count, brd->rev, brd->irq);
 151
 152         /*
 153          * allocate flip buffer for board.
 154          *
 155          * Okay to malloc with GFP_KERNEL, we are not at interrupt
 156          * context, and there are no locks held.
 157          */
 158         brd->flipbuf = kmalloc(MYFLIPLEN, GFP_KERNEL);
 159         if (!brd->flipbuf) {
 160                 /* XXX: leaking all resources from jsm_tty_init and
 161                         jsm_uart_port_init here! */
 162                 dev_err(&pdev->dev, "memory allocation for flipbuf failed\n");
 163                 retval = -ENOMEM;
 164                 goto out_free_irq;
 165         }
 166         memset(brd->flipbuf, 0, MYFLIPLEN);
 167
 168         pci_set_drvdata(pdev, brd);
 169
 170         return 0;
 171  out_free_irq:
 172         free_irq(brd->irq, brd);
 173  out_iounmap:
 174         iounmap(brd->re_map_membase);
 175  out_kfree_brd:
 176         kfree(brd);
 177  out_release_regions:
 178         pci_release_regions(pdev);
 179  out_disable_device:
 180         pci_disable_device(pdev);
 181  out:
 182         return rc;
 183 }
 184
 185 static void jsm_remove_one(struct pci_dev *pdev)
 186 {
 187         struct jsm_board *brd = pci_get_drvdata(pdev);
 188         int i = 0;
 189
 190         jsm_remove_uart_port(brd);
 191
 192         free_irq(brd->irq, brd);
 193         iounmap(brd->re_map_membase);
 194
 195         /* Free all allocated channels structs */
 196         for (i = 0; i < brd->maxports; i++) {
 197                 if (brd->channels[i]) {
 198                         kfree(brd->channels[i]->ch_rqueue);
 199                         kfree(brd->channels[i]->ch_equeue);
 200                         kfree(brd->channels[i]->ch_wqueue);
 201                         kfree(brd->channels[i]);
 202                 }
 203         }
 204
 205         pci_release_regions(pdev);
 206         pci_disable_device(pdev);
 207         kfree(brd->flipbuf);
 208         kfree(brd);
 209 }
 210
 211 static struct pci_device_id jsm_pci_tbl[] = {
 212         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9), 0, 0, 0 },
 213         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9PRI), 0, 0, 1 },
 214         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45), 0, 0, 2 },
 215         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45PRI), 0, 0, 3 },
 216         { 0, }
 217 };
 218 MODULE_DEVICE_TABLE(pci, jsm_pci_tbl);
 219
 220 static struct pci_driver jsm_driver = {
 221         .name           = "jsm",
 222         .id_table       = jsm_pci_tbl,
 223         .probe          = jsm_probe_one,
 224         .remove         = __devexit_p(jsm_remove_one),
 225 };
 226
 227 static int __init jsm_init_module(void)
 228 {
 229         int rc;
 230
 231         rc = uart_register_driver(&jsm_uart_driver);
 232         if (!rc) {
 233                 rc = pci_register_driver(&jsm_driver);
 234                 if (rc)
 235                         uart_unregister_driver(&jsm_uart_driver);
 236         }
 237         return rc;
 238 }
 239
 240 static void __exit jsm_exit_module(void)
 241 {
 242         pci_unregister_driver(&jsm_driver);
 243         uart_unregister_driver(&jsm_uart_driver);
 244 }
 245
 246 module_init(jsm_init_module);
 247 module_exit(jsm_exit_module);