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