drivers/tty/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  * Contact Information:
  17  * Scott H Kilau <Scott_Kilau@digi.com>
  18  * Wendy Xiong   <wendyx@us.ibm.com>
  19  *
  20  *
  21  ***********************************************************************/
  22 #include <linux/module.h>
  23 #include <linux/pci.h>
  24 #include <linux/slab.h>
  25
  26 #include "jsm.h"
  27
  28 MODULE_AUTHOR("Digi International, http://www.digi.com");
  29 MODULE_DESCRIPTION("Driver for the Digi International Neo and Classic PCI based product line");
  30 MODULE_LICENSE("GPL");
  31 MODULE_SUPPORTED_DEVICE("jsm");
  32
  33 #define JSM_DRIVER_NAME "jsm"
  34 #define NR_PORTS        32
  35 #define JSM_MINOR_START 0
  36
  37 struct uart_driver jsm_uart_driver = {
  38         .owner          = THIS_MODULE,
  39         .driver_name    = JSM_DRIVER_NAME,
  40         .dev_name       = "ttyn",
  41         .major          = 0,
  42         .minor          = JSM_MINOR_START,
  43         .nr             = NR_PORTS,
  44 };
  45
  46 static pci_ers_result_t jsm_io_error_detected(struct pci_dev *pdev,
  47                                         pci_channel_state_t state);
  48 static pci_ers_result_t jsm_io_slot_reset(struct pci_dev *pdev);
  49 static void jsm_io_resume(struct pci_dev *pdev);
  50
  51 static const struct pci_error_handlers jsm_err_handler = {
  52         .error_detected = jsm_io_error_detected,
  53         .slot_reset = jsm_io_slot_reset,
  54         .resume = jsm_io_resume,
  55 };
  56
  57 int jsm_debug;
  58 module_param(jsm_debug, int, 0);
  59 MODULE_PARM_DESC(jsm_debug, "Driver debugging level");
  60
  61 static int jsm_probe_one(struct pci_dev *pdev, const struct pci_device_id *ent)
  62 {
  63         int rc = 0;
  64         struct jsm_board *brd;
  65         static int adapter_count;
  66
  67         rc = pci_enable_device(pdev);
  68         if (rc) {
  69                 dev_err(&pdev->dev, "Device enable FAILED\n");
  70                 goto out;
  71         }
  72
  73         rc = pci_request_regions(pdev, "jsm");
  74         if (rc) {
  75                 dev_err(&pdev->dev, "pci_request_region FAILED\n");
  76                 goto out_disable_device;
  77         }
  78
  79         brd = kzalloc(sizeof(*brd), GFP_KERNEL);
  80         if (!brd) {
  81                 rc = -ENOMEM;
  82                 goto out_release_regions;
  83         }
  84
  85         /* store the info for the board we've found */
  86         brd->boardnum = adapter_count++;
  87         brd->pci_dev = pdev;
  88
  89         switch (pdev->device) {
  90         case PCI_DEVICE_ID_NEO_2DB9:
  91         case PCI_DEVICE_ID_NEO_2DB9PRI:
  92         case PCI_DEVICE_ID_NEO_2RJ45:
  93         case PCI_DEVICE_ID_NEO_2RJ45PRI:
  94         case PCI_DEVICE_ID_NEO_2_422_485:
  95                 brd->maxports = 2;
  96                 break;
  97
  98         case PCI_DEVICE_ID_CLASSIC_4:
  99         case PCI_DEVICE_ID_CLASSIC_4_422:
 100         case PCI_DEVICE_ID_NEO_4:
 101         case PCIE_DEVICE_ID_NEO_4:
 102         case PCIE_DEVICE_ID_NEO_4RJ45:
 103         case PCIE_DEVICE_ID_NEO_4_IBM:
 104                 brd->maxports = 4;
 105                 break;
 106
 107         case PCI_DEVICE_ID_CLASSIC_8:
 108         case PCI_DEVICE_ID_CLASSIC_8_422:
 109         case PCI_DEVICE_ID_DIGI_NEO_8:
 110         case PCIE_DEVICE_ID_NEO_8:
 111         case PCIE_DEVICE_ID_NEO_8RJ45:
 112                 brd->maxports = 8;
 113                 break;
 114
 115         default:
 116                 brd->maxports = 1;
 117                 break;
 118         }
 119
 120         spin_lock_init(&brd->bd_intr_lock);
 121
 122         /* store which revision we have */
 123         brd->rev = pdev->revision;
 124
 125         brd->irq = pdev->irq;
 126
 127         switch (pdev->device) {
 128         case PCI_DEVICE_ID_CLASSIC_4:
 129         case PCI_DEVICE_ID_CLASSIC_4_422:
 130         case PCI_DEVICE_ID_CLASSIC_8:
 131         case PCI_DEVICE_ID_CLASSIC_8_422:
 132
 133                 jsm_dbg(INIT, &brd->pci_dev,
 134                         "jsm_found_board - Classic adapter\n");
 135
 136                 /*
 137                  * For PCI ClassicBoards
 138                  * PCI Local Address (.i.e. "resource" number) space
 139                  * 0    PLX Memory Mapped Config
 140                  * 1    PLX I/O Mapped Config
 141                  * 2    I/O Mapped UARTs and Status
 142                  * 3    Memory Mapped VPD
 143                  * 4    Memory Mapped UARTs and Status
 144                  */
 145
 146                 /* Get the PCI Base Address Registers */
 147                 brd->membase = pci_resource_start(pdev, 4);
 148                 brd->membase_end = pci_resource_end(pdev, 4);
 149
 150                 if (brd->membase & 0x1)
 151                         brd->membase &= ~0x3;
 152                 else
 153                         brd->membase &= ~0xF;
 154
 155                 brd->iobase = pci_resource_start(pdev, 1);
 156                 brd->iobase_end = pci_resource_end(pdev, 1);
 157                 brd->iobase = ((unsigned int)(brd->iobase)) & 0xFFFE;
 158
 159                 /* Assign the board_ops struct */
 160                 brd->bd_ops = &jsm_cls_ops;
 161
 162                 brd->bd_uart_offset = 0x8;
 163                 brd->bd_dividend = 921600;
 164
 165                 brd->re_map_membase = ioremap(brd->membase,
 166                                                 pci_resource_len(pdev, 4));
 167                 if (!brd->re_map_membase) {
 168                         dev_err(&pdev->dev,
 169                                 "Card has no PCI Memory resources, failing board.\n");
 170                         rc = -ENOMEM;
 171                         goto out_kfree_brd;
 172                 }
 173
 174                 /*
 175                  * Enable Local Interrupt 1                     (0x1),
 176                  * Local Interrupt 1 Polarity Active high       (0x2),
 177                  * Enable PCI interrupt                         (0x43)
 178                  */
 179                 outb(0x43, brd->iobase + 0x4c);
 180
 181                 break;
 182
 183         case PCI_DEVICE_ID_NEO_2DB9:
 184         case PCI_DEVICE_ID_NEO_2DB9PRI:
 185         case PCI_DEVICE_ID_NEO_2RJ45:
 186         case PCI_DEVICE_ID_NEO_2RJ45PRI:
 187         case PCI_DEVICE_ID_NEO_2_422_485:
 188         case PCI_DEVICE_ID_NEO_4:
 189         case PCIE_DEVICE_ID_NEO_4:
 190         case PCIE_DEVICE_ID_NEO_4RJ45:
 191         case PCIE_DEVICE_ID_NEO_4_IBM:
 192         case PCI_DEVICE_ID_DIGI_NEO_8:
 193         case PCIE_DEVICE_ID_NEO_8:
 194         case PCIE_DEVICE_ID_NEO_8RJ45:
 195
 196                 jsm_dbg(INIT, &brd->pci_dev, "jsm_found_board - NEO adapter\n");
 197
 198                 /* get the PCI Base Address Registers */
 199                 brd->membase    = pci_resource_start(pdev, 0);
 200                 brd->membase_end = pci_resource_end(pdev, 0);
 201
 202                 if (brd->membase & 1)
 203                         brd->membase &= ~0x3;
 204                 else
 205                         brd->membase &= ~0xF;
 206
 207                 /* Assign the board_ops struct */
 208                 brd->bd_ops = &jsm_neo_ops;
 209
 210                 brd->bd_uart_offset = 0x200;
 211                 brd->bd_dividend = 921600;
 212
 213                 brd->re_map_membase = ioremap(brd->membase,
 214                                                 pci_resource_len(pdev, 0));
 215                 if (!brd->re_map_membase) {
 216                         dev_err(&pdev->dev,
 217                                 "Card has no PCI Memory resources, failing board.\n");
 218                         rc = -ENOMEM;
 219                         goto out_kfree_brd;
 220                 }
 221
 222                 break;
 223         default:
 224                 return -ENXIO;
 225         }
 226
 227         rc = request_irq(brd->irq, brd->bd_ops->intr, IRQF_SHARED, "JSM", brd);
 228         if (rc) {
 229                 dev_warn(&pdev->dev, "Failed to hook IRQ %d\n", brd->irq);
 230                 goto out_iounmap;
 231         }
 232
 233         rc = jsm_tty_init(brd);
 234         if (rc < 0) {
 235                 dev_err(&pdev->dev, "Can't init tty devices (%d)\n", rc);
 236                 rc = -ENXIO;
 237                 goto out_free_irq;
 238         }
 239
 240         rc = jsm_uart_port_init(brd);
 241         if (rc < 0) {
 242                 /* XXX: leaking all resources from jsm_tty_init here! */
 243                 dev_err(&pdev->dev, "Can't init uart port (%d)\n", rc);
 244                 rc = -ENXIO;
 245                 goto out_free_irq;
 246         }
 247
 248         /* Log the information about the board */
 249         dev_info(&pdev->dev, "board %d: Digi Classic/Neo (rev %d), irq %d\n",
 250                         adapter_count, brd->rev, brd->irq);
 251
 252         pci_set_drvdata(pdev, brd);
 253         pci_save_state(pdev);
 254
 255         return 0;
 256  out_free_irq:
 257         jsm_remove_uart_port(brd);
 258         free_irq(brd->irq, brd);
 259  out_iounmap:
 260         iounmap(brd->re_map_membase);
 261  out_kfree_brd:
 262         kfree(brd);
 263  out_release_regions:
 264         pci_release_regions(pdev);
 265  out_disable_device:
 266         pci_disable_device(pdev);
 267  out:
 268         return rc;
 269 }
 270
 271 static void jsm_remove_one(struct pci_dev *pdev)
 272 {
 273         struct jsm_board *brd = pci_get_drvdata(pdev);
 274         int i = 0;
 275
 276         switch (pdev->device) {
 277         case PCI_DEVICE_ID_CLASSIC_4:
 278         case PCI_DEVICE_ID_CLASSIC_4_422:
 279         case PCI_DEVICE_ID_CLASSIC_8:
 280         case PCI_DEVICE_ID_CLASSIC_8_422:
 281                 /* Tell card not to interrupt anymore. */
 282                 outb(0x0, brd->iobase + 0x4c);
 283                 break;
 284         default:
 285                 break;
 286         }
 287
 288         jsm_remove_uart_port(brd);
 289
 290         free_irq(brd->irq, brd);
 291         iounmap(brd->re_map_membase);
 292
 293         /* Free all allocated channels structs */
 294         for (i = 0; i < brd->maxports; i++) {
 295                 if (brd->channels[i]) {
 296                         kfree(brd->channels[i]->ch_rqueue);
 297                         kfree(brd->channels[i]->ch_equeue);
 298                         kfree(brd->channels[i]);
 299                 }
 300         }
 301
 302         pci_release_regions(pdev);
 303         pci_disable_device(pdev);
 304         kfree(brd);
 305 }
 306
 307 static struct pci_device_id jsm_pci_tbl[] = {
 308         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9), 0, 0, 0 },
 309         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9PRI), 0, 0, 1 },
 310         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45), 0, 0, 2 },
 311         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45PRI), 0, 0, 3 },
 312         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_4_IBM), 0, 0, 4 },
 313         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_DIGI_NEO_8), 0, 0, 5 },
 314         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_4), 0, 0, 6 },
 315         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_1_422), 0, 0, 7 },
 316         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_1_422_485), 0, 0, 8 },
 317         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2_422_485), 0, 0, 9 },
 318         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_8), 0, 0, 10 },
 319         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_4), 0, 0, 11 },
 320         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_4RJ45), 0, 0, 12 },
 321         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_8RJ45), 0, 0, 13 },
 322         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_CLASSIC_4), 0, 0, 14 },
 323         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_CLASSIC_4_422), 0, 0, 15 },
 324         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_CLASSIC_8), 0, 0, 16 },
 325         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_CLASSIC_8_422), 0, 0, 17 },
 326         { 0, }
 327 };
 328 MODULE_DEVICE_TABLE(pci, jsm_pci_tbl);
 329
 330 static struct pci_driver jsm_driver = {
 331         .name           = "jsm",
 332         .id_table       = jsm_pci_tbl,
 333         .probe          = jsm_probe_one,
 334         .remove         = jsm_remove_one,
 335         .err_handler    = &jsm_err_handler,
 336 };
 337
 338 static pci_ers_result_t jsm_io_error_detected(struct pci_dev *pdev,
 339                                         pci_channel_state_t state)
 340 {
 341         struct jsm_board *brd = pci_get_drvdata(pdev);
 342
 343         jsm_remove_uart_port(brd);
 344
 345         return PCI_ERS_RESULT_NEED_RESET;
 346 }
 347
 348 static pci_ers_result_t jsm_io_slot_reset(struct pci_dev *pdev)
 349 {
 350         int rc;
 351
 352         rc = pci_enable_device(pdev);
 353
 354         if (rc)
 355                 return PCI_ERS_RESULT_DISCONNECT;
 356
 357         pci_set_master(pdev);
 358
 359         return PCI_ERS_RESULT_RECOVERED;
 360 }
 361
 362 static void jsm_io_resume(struct pci_dev *pdev)
 363 {
 364         struct jsm_board *brd = pci_get_drvdata(pdev);
 365
 366         pci_restore_state(pdev);
 367         pci_save_state(pdev);
 368
 369         jsm_uart_port_init(brd);
 370 }
 371
 372 static int __init jsm_init_module(void)
 373 {
 374         int rc;
 375
 376         rc = uart_register_driver(&jsm_uart_driver);
 377         if (!rc) {
 378                 rc = pci_register_driver(&jsm_driver);
 379                 if (rc)
 380                         uart_unregister_driver(&jsm_uart_driver);
 381         }
 382         return rc;
 383 }
 384
 385 static void __exit jsm_exit_module(void)
 386 {
 387         pci_unregister_driver(&jsm_driver);
 388         uart_unregister_driver(&jsm_uart_driver);
 389 }
 390
 391 module_init(jsm_init_module);
 392 module_exit(jsm_exit_module);