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 #include <linux/moduleparam.h>
  27 #include <linux/pci.h>
  28
  29 #include "jsm.h"
  30
  31 MODULE_AUTHOR("Digi International, http://www.digi.com");
  32 MODULE_DESCRIPTION("Driver for the Digi International "
  33                    "Neo PCI based product line");
  34 MODULE_LICENSE("GPL");
  35 MODULE_SUPPORTED_DEVICE("jsm");
  36
  37 #define JSM_DRIVER_NAME "jsm"
  38 #define NR_PORTS        32
  39 #define JSM_MINOR_START 0
  40
  41 struct uart_driver jsm_uart_driver = {
  42         .owner          = THIS_MODULE,
  43         .driver_name    = JSM_DRIVER_NAME,
  44         .dev_name       = "ttyn",
  45         .major          = 253,
  46         .minor          = JSM_MINOR_START,
  47         .nr             = NR_PORTS,
  48 };
  49
  50 int jsm_debug;
  51 int jsm_rawreadok;
  52 module_param(jsm_debug, int, 0);
  53 module_param(jsm_rawreadok, int, 0);
  54 MODULE_PARM_DESC(jsm_debug, "Driver debugging level");
  55 MODULE_PARM_DESC(jsm_rawreadok, "Bypass flip buffers on input");
  56
  57 static int jsm_probe_one(struct pci_dev *pdev, const struct pci_device_id *ent)
  58 {
  59         int rc = 0;
  60         struct jsm_board *brd;
  61         static int adapter_count = 0;
  62         int retval;
  63
  64         rc = pci_enable_device(pdev);
  65         if (rc) {
  66                 dev_err(&pdev->dev, "Device enable FAILED\n");
  67                 goto out;
  68         }
  69
  70         rc = pci_request_regions(pdev, "jsm");
  71         if (rc) {
  72                 dev_err(&pdev->dev, "pci_request_region FAILED\n");
  73                 goto out_disable_device;
  74         }
  75
  76         brd = kmalloc(sizeof(struct jsm_board), GFP_KERNEL);
  77         if (!brd) {
  78                 dev_err(&pdev->dev,
  79                         "memory allocation for board structure failed\n");
  80                 rc = -ENOMEM;
  81                 goto out_release_regions;
  82         }
  83         memset(brd, 0, sizeof(struct jsm_board));
  84
  85         /* store the info for the board we've found */
  86         brd->boardnum = adapter_count++;
  87         brd->pci_dev = pdev;
  88         brd->maxports = 2;
  89
  90         spin_lock_init(&brd->bd_lock);
  91         spin_lock_init(&brd->bd_intr_lock);
  92
  93         /* store which revision we have */
  94         pci_read_config_byte(pdev, PCI_REVISION_ID, &brd->rev);
  95
  96         brd->irq = pdev->irq;
  97
  98         jsm_printk(INIT, INFO, &brd->pci_dev,
  99                 "jsm_found_board - NEO adapter\n");
 100
 101         /* get the PCI Base Address Registers */
 102         brd->membase    = pci_resource_start(pdev, 0);
 103         brd->membase_end = pci_resource_end(pdev, 0);
 104
 105         if (brd->membase & 1)
 106                 brd->membase &= ~3;
 107         else
 108                 brd->membase &= ~15;
 109
 110         /* Assign the board_ops struct */
 111         brd->bd_ops = &jsm_neo_ops;
 112
 113         brd->bd_uart_offset = 0x200;
 114         brd->bd_dividend = 921600;
 115
 116         brd->re_map_membase = ioremap(brd->membase, 0x1000);
 117         if (!brd->re_map_membase) {
 118                 dev_err(&pdev->dev,
 119                         "card has no PCI Memory resources, "
 120                         "failing board.\n");
 121                 rc = -ENOMEM;
 122                 goto out_kfree_brd;
 123         }
 124
 125         rc = request_irq(brd->irq, brd->bd_ops->intr,
 126                         SA_INTERRUPT|SA_SHIRQ, "JSM", brd);
 127         if (rc) {
 128                 printk(KERN_WARNING "Failed to hook IRQ %d\n",brd->irq);
 129                 goto out_iounmap;
 130         }
 131
 132         rc = jsm_tty_init(brd);
 133         if (rc < 0) {
 134                 dev_err(&pdev->dev, "Can't init tty devices (%d)\n", rc);
 135                 retval = -ENXIO;
 136                 goto out_free_irq;
 137         }
 138
 139         rc = jsm_uart_port_init(brd);
 140         if (rc < 0) {
 141                 /* XXX: leaking all resources from jsm_tty_init here! */
 142                 dev_err(&pdev->dev, "Can't init uart port (%d)\n", rc);
 143                 retval = -ENXIO;
 144                 goto out_free_irq;
 145         }
 146
 147         /* Log the information about the board */
 148         dev_info(&pdev->dev, "board %d: Digi Neo (rev %d), irq %d\n",
 149                         adapter_count, brd->rev, brd->irq);
 150
 151         /*
 152          * allocate flip buffer for board.
 153          *
 154          * Okay to malloc with GFP_KERNEL, we are not at interrupt
 155          * context, and there are no locks held.
 156          */
 157         brd->flipbuf = kmalloc(MYFLIPLEN, GFP_KERNEL);
 158         if (!brd->flipbuf) {
 159                 /* XXX: leaking all resources from jsm_tty_init and
 160                         jsm_uart_port_init here! */
 161                 dev_err(&pdev->dev, "memory allocation for flipbuf failed\n");
 162                 retval = -ENOMEM;
 163                 goto out_free_irq;
 164         }
 165         memset(brd->flipbuf, 0, MYFLIPLEN);
 166
 167         pci_set_drvdata(pdev, brd);
 168
 169         return 0;
 170  out_free_irq:
 171         free_irq(brd->irq, brd);
 172  out_iounmap:
 173         iounmap(brd->re_map_membase);
 174  out_kfree_brd:
 175         kfree(brd);
 176  out_release_regions:
 177         pci_release_regions(pdev);
 178  out_disable_device:
 179         pci_disable_device(pdev);
 180  out:
 181         return rc;
 182 }
 183
 184 static void jsm_remove_one(struct pci_dev *pdev)
 185 {
 186         struct jsm_board *brd = pci_get_drvdata(pdev);
 187         int i = 0;
 188
 189         jsm_remove_uart_port(brd);
 190
 191         free_irq(brd->irq, brd);
 192         iounmap(brd->re_map_membase);
 193
 194         /* Free all allocated channels structs */
 195         for (i = 0; i < brd->maxports; i++) {
 196                 if (brd->channels[i]) {
 197                         kfree(brd->channels[i]->ch_rqueue);
 198                         kfree(brd->channels[i]->ch_equeue);
 199                         kfree(brd->channels[i]->ch_wqueue);
 200                         kfree(brd->channels[i]);
 201                 }
 202         }
 203
 204         pci_release_regions(pdev);
 205         pci_disable_device(pdev);
 206         kfree(brd->flipbuf);
 207         kfree(brd);
 208 }
 209
 210 static struct pci_device_id jsm_pci_tbl[] = {
 211         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9), 0, 0, 0 },
 212         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9PRI), 0, 0, 1 },
 213         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45), 0, 0, 2 },
 214         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45PRI), 0, 0, 3 },
 215         { 0, }
 216 };
 217 MODULE_DEVICE_TABLE(pci, jsm_pci_tbl);
 218
 219 static struct pci_driver jsm_driver = {
 220         .name           = "jsm",
 221         .id_table       = jsm_pci_tbl,
 222         .probe          = jsm_probe_one,
 223         .remove         = __devexit_p(jsm_remove_one),
 224 };
 225
 226 static int __init jsm_init_module(void)
 227 {
 228         int rc;
 229
 230         rc = uart_register_driver(&jsm_uart_driver);
 231         if (!rc) {
 232                 rc = pci_register_driver(&jsm_driver);
 233                 if (rc)
 234                         uart_unregister_driver(&jsm_uart_driver);
 235         }
 236         return rc;
 237 }
 238
 239 static void __exit jsm_exit_module(void)
 240 {
 241         pci_unregister_driver(&jsm_driver);
 242         uart_unregister_driver(&jsm_uart_driver);
 243 }
 244
 245 module_init(jsm_init_module);
 246 module_exit(jsm_exit_module);