drivers/net/can/sja1000/plx_pci.c

   1 /*
   2  * Copyright (C) 2008-2010 Pavel Cheblakov <P.B.Cheblakov@inp.nsk.su>
   3  *
   4  * Derived from the ems_pci.c driver:
   5  *      Copyright (C) 2007 Wolfgang Grandegger <wg@grandegger.com>
   6  *      Copyright (C) 2008 Markus Plessing <plessing@ems-wuensche.com>
   7  *      Copyright (C) 2008 Sebastian Haas <haas@ems-wuensche.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the version 2 of the GNU General Public License
  11  * as published by the Free Software Foundation
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software Foundation,
  20  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  21  */
  22
  23 #include <linux/kernel.h>
  24 #include <linux/module.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/netdevice.h>
  27 #include <linux/delay.h>
  28 #include <linux/slab.h>
  29 #include <linux/pci.h>
  30 #include <linux/can/dev.h>
  31 #include <linux/io.h>
  32
  33 #include "sja1000.h"
  34
  35 #define DRV_NAME  "sja1000_plx_pci"
  36
  37 MODULE_AUTHOR("Pavel Cheblakov <P.B.Cheblakov@inp.nsk.su>");
  38 MODULE_DESCRIPTION("Socket-CAN driver for PLX90xx PCI-bridge cards with "
  39                    "the SJA1000 chips");
  40 MODULE_SUPPORTED_DEVICE("Adlink PCI-7841/cPCI-7841, "
  41                         "Adlink PCI-7841/cPCI-7841 SE, "
  42                         "Marathon CAN-bus-PCI, "
  43                         "TEWS TECHNOLOGIES TPMC810, "
  44                         "esd CAN-PCI/CPCI/PCI104/200, "
  45                         "esd CAN-PCI/PMC/266, "
  46                         "esd CAN-PCIe/2000")
  47 MODULE_LICENSE("GPL v2");
  48
  49 #define PLX_PCI_MAX_CHAN 2
  50
  51 struct plx_pci_card {
  52         int channels;                   /* detected channels count */
  53         struct net_device *net_dev[PLX_PCI_MAX_CHAN];
  54         void __iomem *conf_addr;
  55
  56         /* Pointer to device-dependent reset function */
  57         void (*reset_func)(struct pci_dev *pdev);
  58 };
  59
  60 #define PLX_PCI_CAN_CLOCK (16000000 / 2)
  61
  62 /* PLX9030/9050/9052 registers */
  63 #define PLX_INTCSR      0x4c            /* Interrupt Control/Status */
  64 #define PLX_CNTRL       0x50            /* User I/O, Direct Slave Response,
  65                                          * Serial EEPROM, and Initialization
  66                                          * Control register
  67                                          */
  68
  69 #define PLX_LINT1_EN    0x1             /* Local interrupt 1 enable */
  70 #define PLX_LINT2_EN    (1 << 3)        /* Local interrupt 2 enable */
  71 #define PLX_PCI_INT_EN  (1 << 6)        /* PCI Interrupt Enable */
  72 #define PLX_PCI_RESET   (1 << 30)       /* PCI Adapter Software Reset */
  73
  74 /* PLX9056 registers */
  75 #define PLX9056_INTCSR  0x68            /* Interrupt Control/Status */
  76 #define PLX9056_CNTRL   0x6c            /* Control / Software Reset */
  77
  78 #define PLX9056_LINTI   (1 << 11)
  79 #define PLX9056_PCI_INT_EN (1 << 8)
  80 #define PLX9056_PCI_RCR (1 << 29)       /* Read Configuration Registers */
  81
  82 /*
  83  * The board configuration is probably following:
  84  * RX1 is connected to ground.
  85  * TX1 is not connected.
  86  * CLKO is not connected.
  87  * Setting the OCR register to 0xDA is a good idea.
  88  * This means normal output mode, push-pull and the correct polarity.
  89  */
  90 #define PLX_PCI_OCR     (OCR_TX0_PUSHPULL | OCR_TX1_PUSHPULL)
  91
  92 /*
  93  * In the CDR register, you should set CBP to 1.
  94  * You will probably also want to set the clock divider value to 7
  95  * (meaning direct oscillator output) because the second SJA1000 chip
  96  * is driven by the first one CLKOUT output.
  97  */
  98 #define PLX_PCI_CDR                     (CDR_CBP | CDR_CLKOUT_MASK)
  99
 100 /* SJA1000 Control Register in the BasicCAN Mode */
 101 #define REG_CR                          0x00
 102
 103 /* States of some SJA1000 registers after hardware reset in the BasicCAN mode*/
 104 #define REG_CR_BASICCAN_INITIAL         0x21
 105 #define REG_CR_BASICCAN_INITIAL_MASK    0xa1
 106 #define REG_SR_BASICCAN_INITIAL         0x0c
 107 #define REG_IR_BASICCAN_INITIAL         0xe0
 108
 109 /* States of some SJA1000 registers after hardware reset in the PeliCAN mode*/
 110 #define REG_MOD_PELICAN_INITIAL         0x01
 111 #define REG_SR_PELICAN_INITIAL          0x3c
 112 #define REG_IR_PELICAN_INITIAL          0x00
 113
 114 #define ADLINK_PCI_VENDOR_ID            0x144A
 115 #define ADLINK_PCI_DEVICE_ID            0x7841
 116
 117 #define ESD_PCI_SUB_SYS_ID_PCI200       0x0004
 118 #define ESD_PCI_SUB_SYS_ID_PCI266       0x0009
 119 #define ESD_PCI_SUB_SYS_ID_PMC266       0x000e
 120 #define ESD_PCI_SUB_SYS_ID_CPCI200      0x010b
 121 #define ESD_PCI_SUB_SYS_ID_PCIE2000     0x0200
 122 #define ESD_PCI_SUB_SYS_ID_PCI104200    0x0501
 123
 124 #define MARATHON_PCI_DEVICE_ID          0x2715
 125
 126 #define TEWS_PCI_VENDOR_ID              0x1498
 127 #define TEWS_PCI_DEVICE_ID_TMPC810      0x032A
 128
 129 static void plx_pci_reset_common(struct pci_dev *pdev);
 130 static void plx_pci_reset_marathon(struct pci_dev *pdev);
 131 static void plx9056_pci_reset_common(struct pci_dev *pdev);
 132
 133 struct plx_pci_channel_map {
 134         u32 bar;
 135         u32 offset;
 136         u32 size;               /* 0x00 - auto, e.g. length of entire bar */
 137 };
 138
 139 struct plx_pci_card_info {
 140         const char *name;
 141         int channel_count;
 142         u32 can_clock;
 143         u8 ocr;                 /* output control register */
 144         u8 cdr;                 /* clock divider register */
 145
 146         /* Parameters for mapping local configuration space */
 147         struct plx_pci_channel_map conf_map;
 148
 149         /* Parameters for mapping the SJA1000 chips */
 150         struct plx_pci_channel_map chan_map_tbl[PLX_PCI_MAX_CHAN];
 151
 152         /* Pointer to device-dependent reset function */
 153         void (*reset_func)(struct pci_dev *pdev);
 154 };
 155
 156 static struct plx_pci_card_info plx_pci_card_info_adlink __devinitdata = {
 157         "Adlink PCI-7841/cPCI-7841", 2,
 158         PLX_PCI_CAN_CLOCK, PLX_PCI_OCR, PLX_PCI_CDR,
 159         {1, 0x00, 0x00}, { {2, 0x00, 0x80}, {2, 0x80, 0x80} },
 160         &plx_pci_reset_common
 161         /* based on PLX9052 */
 162 };
 163
 164 static struct plx_pci_card_info plx_pci_card_info_adlink_se __devinitdata = {
 165         "Adlink PCI-7841/cPCI-7841 SE", 2,
 166         PLX_PCI_CAN_CLOCK, PLX_PCI_OCR, PLX_PCI_CDR,
 167         {0, 0x00, 0x00}, { {2, 0x00, 0x80}, {2, 0x80, 0x80} },
 168         &plx_pci_reset_common
 169         /* based on PLX9052 */
 170 };
 171
 172 static struct plx_pci_card_info plx_pci_card_info_esd200 __devinitdata = {
 173         "esd CAN-PCI/CPCI/PCI104/200", 2,
 174         PLX_PCI_CAN_CLOCK, PLX_PCI_OCR, PLX_PCI_CDR,
 175         {0, 0x00, 0x00}, { {2, 0x00, 0x80}, {2, 0x100, 0x80} },
 176         &plx_pci_reset_common
 177         /* based on PLX9030/9050 */
 178 };
 179
 180 static struct plx_pci_card_info plx_pci_card_info_esd266 __devinitdata = {
 181         "esd CAN-PCI/PMC/266", 2,
 182         PLX_PCI_CAN_CLOCK, PLX_PCI_OCR, PLX_PCI_CDR,
 183         {0, 0x00, 0x00}, { {2, 0x00, 0x80}, {2, 0x100, 0x80} },
 184         &plx9056_pci_reset_common
 185         /* based on PLX9056 */
 186 };
 187
 188 static struct plx_pci_card_info plx_pci_card_info_esd2000 __devinitdata = {
 189         "esd CAN-PCIe/2000", 2,
 190         PLX_PCI_CAN_CLOCK, PLX_PCI_OCR, PLX_PCI_CDR,
 191         {0, 0x00, 0x00}, { {2, 0x00, 0x80}, {2, 0x100, 0x80} },
 192         &plx9056_pci_reset_common
 193         /* based on PEX8311 */
 194 };
 195
 196 static struct plx_pci_card_info plx_pci_card_info_marathon __devinitdata = {
 197         "Marathon CAN-bus-PCI", 2,
 198         PLX_PCI_CAN_CLOCK, PLX_PCI_OCR, PLX_PCI_CDR,
 199         {0, 0x00, 0x00}, { {2, 0x00, 0x00}, {4, 0x00, 0x00} },
 200         &plx_pci_reset_marathon
 201         /* based on PLX9052 */
 202 };
 203
 204 static struct plx_pci_card_info plx_pci_card_info_tews __devinitdata = {
 205         "TEWS TECHNOLOGIES TPMC810", 2,
 206         PLX_PCI_CAN_CLOCK, PLX_PCI_OCR, PLX_PCI_CDR,
 207         {0, 0x00, 0x00}, { {2, 0x000, 0x80}, {2, 0x100, 0x80} },
 208         &plx_pci_reset_common
 209         /* based on PLX9030 */
 210 };
 211
 212 static DEFINE_PCI_DEVICE_TABLE(plx_pci_tbl) = {
 213         {
 214                 /* Adlink PCI-7841/cPCI-7841 */
 215                 ADLINK_PCI_VENDOR_ID, ADLINK_PCI_DEVICE_ID,
 216                 PCI_ANY_ID, PCI_ANY_ID,
 217                 PCI_CLASS_NETWORK_OTHER << 8, ~0,
 218                 (kernel_ulong_t)&plx_pci_card_info_adlink
 219         },
 220         {
 221                 /* Adlink PCI-7841/cPCI-7841 SE */
 222                 ADLINK_PCI_VENDOR_ID, ADLINK_PCI_DEVICE_ID,
 223                 PCI_ANY_ID, PCI_ANY_ID,
 224                 PCI_CLASS_COMMUNICATION_OTHER << 8, ~0,
 225                 (kernel_ulong_t)&plx_pci_card_info_adlink_se
 226         },
 227         {
 228                 /* esd CAN-PCI/200 */
 229                 PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
 230                 PCI_VENDOR_ID_ESDGMBH, ESD_PCI_SUB_SYS_ID_PCI200,
 231                 0, 0,
 232                 (kernel_ulong_t)&plx_pci_card_info_esd200
 233         },
 234         {
 235                 /* esd CAN-CPCI/200 */
 236                 PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9030,
 237                 PCI_VENDOR_ID_ESDGMBH, ESD_PCI_SUB_SYS_ID_CPCI200,
 238                 0, 0,
 239                 (kernel_ulong_t)&plx_pci_card_info_esd200
 240         },
 241         {
 242                 /* esd CAN-PCI104/200 */
 243                 PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9030,
 244                 PCI_VENDOR_ID_ESDGMBH, ESD_PCI_SUB_SYS_ID_PCI104200,
 245                 0, 0,
 246                 (kernel_ulong_t)&plx_pci_card_info_esd200
 247         },
 248         {
 249                 /* esd CAN-PCI/266 */
 250                 PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9056,
 251                 PCI_VENDOR_ID_ESDGMBH, ESD_PCI_SUB_SYS_ID_PCI266,
 252                 0, 0,
 253                 (kernel_ulong_t)&plx_pci_card_info_esd266
 254         },
 255         {
 256                 /* esd CAN-PMC/266 */
 257                 PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9056,
 258                 PCI_VENDOR_ID_ESDGMBH, ESD_PCI_SUB_SYS_ID_PMC266,
 259                 0, 0,
 260                 (kernel_ulong_t)&plx_pci_card_info_esd266
 261         },
 262         {
 263                 /* esd CAN-PCIE/2000 */
 264                 PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9056,
 265                 PCI_VENDOR_ID_ESDGMBH, ESD_PCI_SUB_SYS_ID_PCIE2000,
 266                 0, 0,
 267                 (kernel_ulong_t)&plx_pci_card_info_esd2000
 268         },
 269         {
 270                 /* Marathon CAN-bus-PCI card */
 271                 PCI_VENDOR_ID_PLX, MARATHON_PCI_DEVICE_ID,
 272                 PCI_ANY_ID, PCI_ANY_ID,
 273                 0, 0,
 274                 (kernel_ulong_t)&plx_pci_card_info_marathon
 275         },
 276         {
 277                 /* TEWS TECHNOLOGIES TPMC810 card */
 278                 TEWS_PCI_VENDOR_ID, TEWS_PCI_DEVICE_ID_TMPC810,
 279                 PCI_ANY_ID, PCI_ANY_ID,
 280                 0, 0,
 281                 (kernel_ulong_t)&plx_pci_card_info_tews
 282         },
 283         { 0,}
 284 };
 285 MODULE_DEVICE_TABLE(pci, plx_pci_tbl);
 286
 287 static u8 plx_pci_read_reg(const struct sja1000_priv *priv, int port)
 288 {
 289         return ioread8(priv->reg_base + port);
 290 }
 291
 292 static void plx_pci_write_reg(const struct sja1000_priv *priv, int port, u8 val)
 293 {
 294         iowrite8(val, priv->reg_base + port);
 295 }
 296
 297 /*
 298  * Check if a CAN controller is present at the specified location
 299  * by trying to switch 'em from the Basic mode into the PeliCAN mode.
 300  * Also check states of some registers in reset mode.
 301  */
 302 static inline int plx_pci_check_sja1000(const struct sja1000_priv *priv)
 303 {
 304         int flag = 0;
 305
 306         /*
 307          * Check registers after hardware reset (the Basic mode)
 308          * See states on p. 10 of the Datasheet.
 309          */
 310         if ((priv->read_reg(priv, REG_CR) & REG_CR_BASICCAN_INITIAL_MASK) ==
 311             REG_CR_BASICCAN_INITIAL &&
 312             (priv->read_reg(priv, REG_SR) == REG_SR_BASICCAN_INITIAL) &&
 313             (priv->read_reg(priv, REG_IR) == REG_IR_BASICCAN_INITIAL))
 314                 flag = 1;
 315
 316         /* Bring the SJA1000 into the PeliCAN mode*/
 317         priv->write_reg(priv, REG_CDR, CDR_PELICAN);
 318
 319         /*
 320          * Check registers after reset in the PeliCAN mode.
 321          * See states on p. 23 of the Datasheet.
 322          */
 323         if (priv->read_reg(priv, REG_MOD) == REG_MOD_PELICAN_INITIAL &&
 324             priv->read_reg(priv, REG_SR) == REG_SR_PELICAN_INITIAL &&
 325             priv->read_reg(priv, REG_IR) == REG_IR_PELICAN_INITIAL)
 326                 return flag;
 327
 328         return 0;
 329 }
 330
 331 /*
 332  * PLX9030/50/52 software reset
 333  * Also LRESET# asserts and brings to reset device on the Local Bus (if wired).
 334  * For most cards it's enough for reset the SJA1000 chips.
 335  */
 336 static void plx_pci_reset_common(struct pci_dev *pdev)
 337 {
 338         struct plx_pci_card *card = pci_get_drvdata(pdev);
 339         u32 cntrl;
 340
 341         cntrl = ioread32(card->conf_addr + PLX_CNTRL);
 342         cntrl |= PLX_PCI_RESET;
 343         iowrite32(cntrl, card->conf_addr + PLX_CNTRL);
 344         udelay(100);
 345         cntrl ^= PLX_PCI_RESET;
 346         iowrite32(cntrl, card->conf_addr + PLX_CNTRL);
 347 };
 348
 349 /*
 350  * PLX9056 software reset
 351  * Assert LRESET# and reset device(s) on the Local Bus (if wired).
 352  */
 353 static void plx9056_pci_reset_common(struct pci_dev *pdev)
 354 {
 355         struct plx_pci_card *card = pci_get_drvdata(pdev);
 356         u32 cntrl;
 357
 358         /* issue a local bus reset */
 359         cntrl = ioread32(card->conf_addr + PLX9056_CNTRL);
 360         cntrl |= PLX_PCI_RESET;
 361         iowrite32(cntrl, card->conf_addr + PLX9056_CNTRL);
 362         udelay(100);
 363         cntrl ^= PLX_PCI_RESET;
 364         iowrite32(cntrl, card->conf_addr + PLX9056_CNTRL);
 365
 366         /* reload local configuration from EEPROM */
 367         cntrl |= PLX9056_PCI_RCR;
 368         iowrite32(cntrl, card->conf_addr + PLX9056_CNTRL);
 369
 370         /*
 371          * There is no safe way to poll for the end
 372          * of reconfiguration process. Waiting for 10ms
 373          * is safe.
 374          */
 375         mdelay(10);
 376
 377         cntrl ^= PLX9056_PCI_RCR;
 378         iowrite32(cntrl, card->conf_addr + PLX9056_CNTRL);
 379 };
 380
 381 /* Special reset function for Marathon card */
 382 static void plx_pci_reset_marathon(struct pci_dev *pdev)
 383 {
 384         void __iomem *reset_addr;
 385         int i;
 386         static const int reset_bar[2] = {3, 5};
 387
 388         plx_pci_reset_common(pdev);
 389
 390         for (i = 0; i < 2; i++) {
 391                 reset_addr = pci_iomap(pdev, reset_bar[i], 0);
 392                 if (!reset_addr) {
 393                         dev_err(&pdev->dev, "Failed to remap reset "
 394                                 "space %d (BAR%d)\n", i, reset_bar[i]);
 395                 } else {
 396                         /* reset the SJA1000 chip */
 397                         iowrite8(0x1, reset_addr);
 398                         udelay(100);
 399                         pci_iounmap(pdev, reset_addr);
 400                 }
 401         }
 402 }
 403
 404 static void plx_pci_del_card(struct pci_dev *pdev)
 405 {
 406         struct plx_pci_card *card = pci_get_drvdata(pdev);
 407         struct net_device *dev;
 408         struct sja1000_priv *priv;
 409         int i = 0;
 410
 411         for (i = 0; i < card->channels; i++) {
 412                 dev = card->net_dev[i];
 413                 if (!dev)
 414                         continue;
 415
 416                 dev_info(&pdev->dev, "Removing %s\n", dev->name);
 417                 unregister_sja1000dev(dev);
 418                 priv = netdev_priv(dev);
 419                 if (priv->reg_base)
 420                         pci_iounmap(pdev, priv->reg_base);
 421                 free_sja1000dev(dev);
 422         }
 423
 424         card->reset_func(pdev);
 425
 426         /*
 427          * Disable interrupts from PCI-card and disable local
 428          * interrupts
 429          */
 430         if (pdev->device != PCI_DEVICE_ID_PLX_9056)
 431                 iowrite32(0x0, card->conf_addr + PLX_INTCSR);
 432         else
 433                 iowrite32(0x0, card->conf_addr + PLX9056_INTCSR);
 434
 435         if (card->conf_addr)
 436                 pci_iounmap(pdev, card->conf_addr);
 437
 438         kfree(card);
 439
 440         pci_disable_device(pdev);
 441         pci_set_drvdata(pdev, NULL);
 442 }
 443
 444 /*
 445  * Probe PLX90xx based device for the SJA1000 chips and register each
 446  * available CAN channel to SJA1000 Socket-CAN subsystem.
 447  */
 448 static int __devinit plx_pci_add_card(struct pci_dev *pdev,
 449                                       const struct pci_device_id *ent)
 450 {
 451         struct sja1000_priv *priv;
 452         struct net_device *dev;
 453         struct plx_pci_card *card;
 454         struct plx_pci_card_info *ci;
 455         int err, i;
 456         u32 val;
 457         void __iomem *addr;
 458
 459         ci = (struct plx_pci_card_info *)ent->driver_data;
 460
 461         if (pci_enable_device(pdev) < 0) {
 462                 dev_err(&pdev->dev, "Failed to enable PCI device\n");
 463                 return -ENODEV;
 464         }
 465
 466         dev_info(&pdev->dev, "Detected \"%s\" card at slot #%i\n",
 467                  ci->name, PCI_SLOT(pdev->devfn));
 468
 469         /* Allocate card structures to hold addresses, ... */
 470         card = kzalloc(sizeof(*card), GFP_KERNEL);
 471         if (!card) {
 472                 dev_err(&pdev->dev, "Unable to allocate memory\n");
 473                 pci_disable_device(pdev);
 474                 return -ENOMEM;
 475         }
 476
 477         pci_set_drvdata(pdev, card);
 478
 479         card->channels = 0;
 480
 481         /* Remap PLX90xx configuration space */
 482         addr = pci_iomap(pdev, ci->conf_map.bar, ci->conf_map.size);
 483         if (!addr) {
 484                 err = -ENOMEM;
 485                 dev_err(&pdev->dev, "Failed to remap configuration space "
 486                         "(BAR%d)\n", ci->conf_map.bar);
 487                 goto failure_cleanup;
 488         }
 489         card->conf_addr = addr + ci->conf_map.offset;
 490
 491         ci->reset_func(pdev);
 492         card->reset_func = ci->reset_func;
 493
 494         /* Detect available channels */
 495         for (i = 0; i < ci->channel_count; i++) {
 496                 struct plx_pci_channel_map *cm = &ci->chan_map_tbl[i];
 497
 498                 dev = alloc_sja1000dev(0);
 499                 if (!dev) {
 500                         err = -ENOMEM;
 501                         goto failure_cleanup;
 502                 }
 503
 504                 card->net_dev[i] = dev;
 505                 priv = netdev_priv(dev);
 506                 priv->priv = card;
 507                 priv->irq_flags = IRQF_SHARED;
 508
 509                 dev->irq = pdev->irq;
 510
 511                 /*
 512                  * Remap IO space of the SJA1000 chips
 513                  * This is device-dependent mapping
 514                  */
 515                 addr = pci_iomap(pdev, cm->bar, cm->size);
 516                 if (!addr) {
 517                         err = -ENOMEM;
 518                         dev_err(&pdev->dev, "Failed to remap BAR%d\n", cm->bar);
 519                         goto failure_cleanup;
 520                 }
 521
 522                 priv->reg_base = addr + cm->offset;
 523                 priv->read_reg = plx_pci_read_reg;
 524                 priv->write_reg = plx_pci_write_reg;
 525
 526                 /* Check if channel is present */
 527                 if (plx_pci_check_sja1000(priv)) {
 528                         priv->can.clock.freq = ci->can_clock;
 529                         priv->ocr = ci->ocr;
 530                         priv->cdr = ci->cdr;
 531
 532                         SET_NETDEV_DEV(dev, &pdev->dev);
 533
 534                         /* Register SJA1000 device */
 535                         err = register_sja1000dev(dev);
 536                         if (err) {
 537                                 dev_err(&pdev->dev, "Registering device failed "
 538                                         "(err=%d)\n", err);
 539                                 free_sja1000dev(dev);
 540                                 goto failure_cleanup;
 541                         }
 542
 543                         card->channels++;
 544
 545                         dev_info(&pdev->dev, "Channel #%d at 0x%p, irq %d "
 546                                  "registered as %s\n", i + 1, priv->reg_base,
 547                                  dev->irq, dev->name);
 548                 } else {
 549                         dev_err(&pdev->dev, "Channel #%d not detected\n",
 550                                 i + 1);
 551                         free_sja1000dev(dev);
 552                 }
 553         }
 554
 555         if (!card->channels) {
 556                 err = -ENODEV;
 557                 goto failure_cleanup;
 558         }
 559
 560         /*
 561          * Enable interrupts from PCI-card (PLX90xx) and enable Local_1,
 562          * Local_2 interrupts from the SJA1000 chips
 563          */
 564         if (pdev->device != PCI_DEVICE_ID_PLX_9056) {
 565                 val = ioread32(card->conf_addr + PLX_INTCSR);
 566                 if (pdev->subsystem_vendor == PCI_VENDOR_ID_ESDGMBH)
 567                         val |= PLX_LINT1_EN | PLX_PCI_INT_EN;
 568                 else
 569                         val |= PLX_LINT1_EN | PLX_LINT2_EN | PLX_PCI_INT_EN;
 570                 iowrite32(val, card->conf_addr + PLX_INTCSR);
 571         } else {
 572                 iowrite32(PLX9056_LINTI | PLX9056_PCI_INT_EN,
 573                           card->conf_addr + PLX9056_INTCSR);
 574         }
 575         return 0;
 576
 577 failure_cleanup:
 578         dev_err(&pdev->dev, "Error: %d. Cleaning Up.\n", err);
 579
 580         plx_pci_del_card(pdev);
 581
 582         return err;
 583 }
 584
 585 static struct pci_driver plx_pci_driver = {
 586         .name = DRV_NAME,
 587         .id_table = plx_pci_tbl,
 588         .probe = plx_pci_add_card,
 589         .remove = plx_pci_del_card,
 590 };
 591
 592 static int __init plx_pci_init(void)
 593 {
 594         return pci_register_driver(&plx_pci_driver);
 595 }
 596
 597 static void __exit plx_pci_exit(void)
 598 {
 599         pci_unregister_driver(&plx_pci_driver);
 600 }
 601
 602 module_init(plx_pci_init);
 603 module_exit(plx_pci_exit);