target/linux/ar7/files/arch/mips/ar7/vlynq.c

   1 /*
   2  * Copyright (C) 2006, 2007 OpenWrt.org
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18
  19 #include <linux/init.h>
  20 #include <linux/types.h>
  21 #include <linux/kernel.h>
  22 #include <linux/string.h>
  23 #include <linux/device.h>
  24 #include <linux/errno.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/device.h>
  28 #include <linux/io.h>
  29
  30 #include <asm/ar7/vlynq.h>
  31
  32 #define PER_DEVICE_IRQS                 32
  33
  34 #define VLYNQ_CTRL_PM_ENABLE            0x80000000
  35 #define VLYNQ_CTRL_CLOCK_INT            0x00008000
  36 #define VLYNQ_CTRL_CLOCK_DIV(x)         (((x) & 7) << 16)
  37 #define VLYNQ_CTRL_INT_LOCAL            0x00004000
  38 #define VLYNQ_CTRL_INT_ENABLE           0x00002000
  39 #define VLYNQ_CTRL_INT_VECTOR(x)        (((x) & 0x1f) << 8)
  40 #define VLYNQ_CTRL_INT2CFG              0x00000080
  41 #define VLYNQ_CTRL_RESET                0x00000001
  42
  43 #define VLYNQ_INT_OFFSET                0x00000014
  44 #define VLYNQ_REMOTE_OFFSET             0x00000080
  45
  46 #define VLYNQ_STATUS_LINK               0x00000001
  47 #define VLYNQ_STATUS_LERROR             0x00000080
  48 #define VLYNQ_STATUS_RERROR             0x00000100
  49
  50 #define VINT_ENABLE                     0x00000100
  51 #define VINT_TYPE_EDGE                  0x00000080
  52 #define VINT_LEVEL_LOW                  0x00000040
  53 #define VINT_VECTOR(x)                  ((x) & 0x1f)
  54 #define VINT_OFFSET(irq)                (8 * ((irq) % 4))
  55
  56 #define VLYNQ_AUTONEGO_V2               0x00010000
  57
  58 struct vlynq_regs {
  59         u32 revision;
  60         u32 control;
  61         u32 status;
  62         u32 int_prio;
  63         u32 int_status;
  64         u32 int_pending;
  65         u32 int_ptr;
  66         u32 tx_offset;
  67         struct vlynq_mapping rx_mapping[4];
  68         u32 chip;
  69         u32 autonego;
  70         u32 unused[6];
  71         u32 int_device[8];
  72 } __attribute__ ((packed));
  73
  74 #define vlynq_reg_read(reg) readl(&(reg))
  75 #define vlynq_reg_write(reg, val)  writel(val, &(reg))
  76
  77 #ifdef VLYNQ_DEBUG
  78 static void vlynq_dump_regs(struct vlynq_device *dev)
  79 {
  80         int i;
  81         printk(KERN_DEBUG "VLYNQ local=%p remote=%p\n",
  82                         dev->local, dev->remote);
  83         for (i = 0; i < 32; i++) {
  84                 printk(KERN_DEBUG "VLYNQ: local %d: %08x\n",
  85                         i + 1, ((u32 *)dev->local)[i]);
  86                 printk(KERN_DEBUG "VLYNQ: remote %d: %08x\n",
  87                         i + 1, ((u32 *)dev->remote)[i]);
  88         }
  89 }
  90
  91 static void vlynq_dump_mem(u32 *base, int count)
  92 {
  93         int i;
  94         for (i = 0; i < (count + 3) / 4; i++) {
  95                 if (i % 4 == 0) printk(KERN_DEBUG "\nMEM[0x%04x]:", i * 4);
  96                 printk(KERN_DEBUG " 0x%08x", *(base + i));
  97         }
  98         printk(KERN_DEBUG "\n");
  99 }
 100 #endif
 101
 102 int vlynq_linked(struct vlynq_device *dev)
 103 {
 104         int i;
 105
 106         for (i = 0; i < 100; i++)
 107                 if (vlynq_reg_read(dev->local->status) & VLYNQ_STATUS_LINK)
 108                         return 1;
 109                 else
 110                         cpu_relax();
 111
 112         return 0;
 113 }
 114
 115 static void vlynq_irq_unmask(unsigned int irq)
 116 {
 117         u32 val;
 118         struct vlynq_device *dev = get_irq_chip_data(irq);
 119         int virq;
 120
 121         BUG_ON(!dev);
 122         virq = irq - dev->irq_start;
 123         val = vlynq_reg_read(dev->remote->int_device[virq >> 2]);
 124         val |= (VINT_ENABLE | virq) << VINT_OFFSET(virq);
 125         vlynq_reg_write(dev->remote->int_device[virq >> 2], val);
 126 }
 127
 128 static void vlynq_irq_mask(unsigned int irq)
 129 {
 130         u32 val;
 131         struct vlynq_device *dev = get_irq_chip_data(irq);
 132         int virq;
 133
 134         BUG_ON(!dev);
 135         virq = irq - dev->irq_start;
 136         val = vlynq_reg_read(dev->remote->int_device[virq >> 2]);
 137         val &= ~(VINT_ENABLE << VINT_OFFSET(virq));
 138         vlynq_reg_write(dev->remote->int_device[virq >> 2], val);
 139 }
 140
 141 static int vlynq_irq_type(unsigned int irq, unsigned int flow_type)
 142 {
 143         u32 val;
 144         struct vlynq_device *dev = get_irq_chip_data(irq);
 145         int virq;
 146
 147         BUG_ON(!dev);
 148         virq = irq - dev->irq_start;
 149         val = vlynq_reg_read(dev->remote->int_device[virq >> 2]);
 150         switch (flow_type & IRQ_TYPE_SENSE_MASK) {
 151         case IRQ_TYPE_EDGE_RISING:
 152         case IRQ_TYPE_EDGE_FALLING:
 153         case IRQ_TYPE_EDGE_BOTH:
 154                 val |= VINT_TYPE_EDGE << VINT_OFFSET(virq);
 155                 val &= ~(VINT_LEVEL_LOW << VINT_OFFSET(virq));
 156                 break;
 157         case IRQ_TYPE_LEVEL_HIGH:
 158                 val &= ~(VINT_TYPE_EDGE << VINT_OFFSET(virq));
 159                 val &= ~(VINT_LEVEL_LOW << VINT_OFFSET(virq));
 160                 break;
 161         case IRQ_TYPE_LEVEL_LOW:
 162                 val &= ~(VINT_TYPE_EDGE << VINT_OFFSET(virq));
 163                 val |= VINT_LEVEL_LOW << VINT_OFFSET(virq);
 164                 break;
 165         default:
 166                 return -EINVAL;
 167         }
 168         vlynq_reg_write(dev->remote->int_device[virq >> 2], val);
 169         return 0;
 170 }
 171
 172 static void vlynq_local_ack(unsigned int irq)
 173 {
 174         struct vlynq_device *dev = get_irq_chip_data(irq);
 175         u32 status = vlynq_reg_read(dev->local->status);
 176         if (printk_ratelimit())
 177                 printk(KERN_DEBUG "%s: local status: 0x%08x\n",
 178                        dev->dev.bus_id, status);
 179         vlynq_reg_write(dev->local->status, status);
 180 }
 181
 182 static void vlynq_remote_ack(unsigned int irq)
 183 {
 184         struct vlynq_device *dev = get_irq_chip_data(irq);
 185         u32 status = vlynq_reg_read(dev->remote->status);
 186         if (printk_ratelimit())
 187                 printk(KERN_DEBUG "%s: remote status: 0x%08x\n",
 188                        dev->dev.bus_id, status);
 189         vlynq_reg_write(dev->remote->status, status);
 190 }
 191
 192 #warning FIXME: process one irq per call
 193 static irqreturn_t vlynq_irq(int irq, void *dev_id)
 194 {
 195         struct vlynq_device *dev = dev_id;
 196         u32 status;
 197         int virq = 0;
 198
 199         status = vlynq_reg_read(dev->local->int_status);
 200         vlynq_reg_write(dev->local->int_status, status);
 201
 202         if (unlikely(!status))
 203                 spurious_interrupt();
 204
 205         while (status) {
 206                 if (status & 1)
 207                         do_IRQ(dev->irq_start + virq);
 208                 status >>= 1;
 209                 virq++;
 210         }
 211
 212         return IRQ_HANDLED;
 213 }
 214
 215 static struct irq_chip vlynq_irq_chip = {
 216         .name = "vlynq",
 217         .unmask = vlynq_irq_unmask,
 218         .mask = vlynq_irq_mask,
 219         .set_type = vlynq_irq_type,
 220 };
 221
 222 static struct irq_chip vlynq_local_chip = {
 223         .name = "vlynq local error",
 224         .unmask = vlynq_irq_unmask,
 225         .mask = vlynq_irq_mask,
 226         .ack = vlynq_local_ack,
 227 };
 228
 229 static struct irq_chip vlynq_remote_chip = {
 230         .name = "vlynq local error",
 231         .unmask = vlynq_irq_unmask,
 232         .mask = vlynq_irq_mask,
 233         .ack = vlynq_remote_ack,
 234 };
 235
 236 static int vlynq_setup_irq(struct vlynq_device *dev)
 237 {
 238         u32 val;
 239         int i;
 240
 241         if (dev->local_irq == dev->remote_irq) {
 242                 printk(KERN_ERR
 243                        "%s: local vlynq irq should be different from remote\n",
 244                        dev->dev.bus_id);
 245                 return -EINVAL;
 246         }
 247
 248         /* Clear local and remote error bits */
 249         vlynq_reg_write(dev->local->status, vlynq_reg_read(dev->local->status));
 250         vlynq_reg_write(dev->remote->status,
 251                         vlynq_reg_read(dev->remote->status));
 252
 253         /* Now setup interrupts */
 254         val = VLYNQ_CTRL_INT_VECTOR(dev->local_irq);
 255         val |= VLYNQ_CTRL_INT_ENABLE | VLYNQ_CTRL_INT_LOCAL |
 256                 VLYNQ_CTRL_INT2CFG;
 257         val |= vlynq_reg_read(dev->local->control);
 258         vlynq_reg_write(dev->local->int_ptr, VLYNQ_INT_OFFSET);
 259         vlynq_reg_write(dev->local->control, val);
 260
 261         val = VLYNQ_CTRL_INT_VECTOR(dev->remote_irq);
 262         val |= VLYNQ_CTRL_INT_ENABLE;
 263         val |= vlynq_reg_read(dev->remote->control);
 264         vlynq_reg_write(dev->remote->int_ptr, VLYNQ_INT_OFFSET);
 265         vlynq_reg_write(dev->remote->control, val);
 266
 267         for (i = 0; i < PER_DEVICE_IRQS; i++) {
 268                 if (i == dev->local_irq) {
 269                         set_irq_chip_and_handler(dev->irq_start + i,
 270                                                  &vlynq_local_chip,
 271                                                  handle_level_irq);
 272                         set_irq_chip_data(dev->irq_start + i, dev);
 273                 } else if (i == dev->remote_irq) {
 274                         set_irq_chip_and_handler(dev->irq_start + i,
 275                                                  &vlynq_remote_chip,
 276                                                  handle_level_irq);
 277                         set_irq_chip_data(dev->irq_start + i, dev);
 278                 } else {
 279                         set_irq_chip(dev->irq_start + i, &vlynq_irq_chip);
 280                         set_irq_chip_data(dev->irq_start + i, dev);
 281                         vlynq_reg_write(dev->remote->int_device[i >> 2], 0);
 282                 }
 283         }
 284
 285         if (request_irq(dev->irq, vlynq_irq, IRQF_SHARED, "vlynq", dev)) {
 286                 printk(KERN_ERR "%s: request_irq failed\n", dev->dev.bus_id);
 287                 return -EAGAIN;
 288         }
 289
 290         return 0;
 291 }
 292
 293 static void vlynq_free_irq(struct vlynq_device *dev)
 294 {
 295         free_irq(dev->irq, dev);
 296 }
 297
 298 static void vlynq_device_release(struct device *dev)
 299 {
 300         struct vlynq_device *vdev = to_vlynq_device(dev);
 301         kfree(vdev);
 302 }
 303
 304 static int vlynq_device_probe(struct device *dev)
 305 {
 306         struct vlynq_driver *drv = to_vlynq_driver(dev->driver);
 307         if (drv->probe)
 308                 return drv->probe(to_vlynq_device(dev));
 309         return 0;
 310 }
 311
 312 static int vlynq_device_remove(struct device *dev)
 313 {
 314         struct vlynq_driver *drv = to_vlynq_driver(dev->driver);
 315         if (drv->remove)
 316                 return drv->remove(to_vlynq_device(dev));
 317         return 0;
 318 }
 319
 320 int __vlynq_register_driver(struct vlynq_driver *driver, struct module *owner)
 321 {
 322         driver->driver.name = driver->name;
 323         driver->driver.bus = &vlynq_bus_type;
 324         return driver_register(&driver->driver);
 325 }
 326 EXPORT_SYMBOL(__vlynq_register_driver);
 327
 328 void vlynq_unregister_driver(struct vlynq_driver *driver)
 329 {
 330         driver_unregister(&driver->driver);
 331 }
 332 EXPORT_SYMBOL(vlynq_unregister_driver);
 333
 334 int vlynq_device_enable(struct vlynq_device *dev)
 335 {
 336         int i, result;
 337         struct plat_vlynq_ops *ops = dev->dev.platform_data;
 338
 339         result = ops->on(dev);
 340         if (result)
 341                 return result;
 342
 343         switch (dev->divisor) {
 344         case vlynq_div_auto:
 345                 /* First try locally supplied clock */
 346                 vlynq_reg_write(dev->remote->control, 0);
 347                 for (i = vlynq_ldiv1; i <= vlynq_ldiv8; i++) {
 348                         vlynq_reg_write(dev->local->control,
 349                                         VLYNQ_CTRL_CLOCK_INT |
 350                                         VLYNQ_CTRL_CLOCK_DIV(i - vlynq_ldiv1));
 351                         if (vlynq_linked(dev)) {
 352                                 printk(KERN_DEBUG
 353                                        "%s: using local clock divisor %d\n",
 354                                        dev->dev.bus_id, i - vlynq_ldiv1 + 1);
 355                                 return vlynq_setup_irq(dev);
 356                         }
 357                 }
 358                 /* Then remotely supplied clock */
 359                 vlynq_reg_write(dev->local->control, 0);
 360                 for (i = vlynq_rdiv1; i <= vlynq_rdiv8; i++) {
 361                         vlynq_reg_write(dev->remote->control,
 362                                         VLYNQ_CTRL_CLOCK_INT |
 363                                         VLYNQ_CTRL_CLOCK_DIV(i - vlynq_rdiv1));
 364                         if (vlynq_linked(dev)) {
 365                                 printk(KERN_DEBUG
 366                                        "%s: using remote clock divisor %d\n",
 367                                        dev->dev.bus_id, i - vlynq_rdiv1 + 1);
 368                                 return vlynq_setup_irq(dev);
 369                         }
 370                 }
 371                 /* At last, externally supplied clock */
 372                 vlynq_reg_write(dev->remote->control, 0);
 373                 if (vlynq_linked(dev)) {
 374                         printk(KERN_DEBUG "%s: using external clock\n",
 375                                dev->dev.bus_id);
 376                         return vlynq_setup_irq(dev);
 377                 }
 378                 break;
 379         case vlynq_ldiv1: case vlynq_ldiv2: case vlynq_ldiv3: case vlynq_ldiv4:
 380         case vlynq_ldiv5: case vlynq_ldiv6: case vlynq_ldiv7: case vlynq_ldiv8:
 381                 vlynq_reg_write(dev->remote->control, 0);
 382                 vlynq_reg_write(dev->local->control,
 383                                 VLYNQ_CTRL_CLOCK_INT |
 384                                 VLYNQ_CTRL_CLOCK_DIV(dev->divisor -
 385                                                      vlynq_ldiv1));
 386                 if (vlynq_linked(dev)) {
 387                         printk(KERN_DEBUG
 388                                "%s: using local clock divisor %d\n",
 389                                dev->dev.bus_id, dev->divisor - vlynq_ldiv1 + 1);
 390                         return vlynq_setup_irq(dev);
 391                 }
 392                 break;
 393         case vlynq_rdiv1: case vlynq_rdiv2: case vlynq_rdiv3: case vlynq_rdiv4:
 394         case vlynq_rdiv5: case vlynq_rdiv6: case vlynq_rdiv7: case vlynq_rdiv8:
 395                 vlynq_reg_write(dev->local->control, 0);
 396                 vlynq_reg_write(dev->remote->control,
 397                                 VLYNQ_CTRL_CLOCK_INT |
 398                                 VLYNQ_CTRL_CLOCK_DIV(dev->divisor -
 399                                                      vlynq_rdiv1));
 400                 if (vlynq_linked(dev)) {
 401                         printk(KERN_DEBUG
 402                                "%s: using remote clock divisor %d\n",
 403                                dev->dev.bus_id, dev->divisor - vlynq_rdiv1 + 1);
 404                         return vlynq_setup_irq(dev);
 405                 }
 406                 break;
 407         case vlynq_div_external:
 408                 vlynq_reg_write(dev->local->control, 0);
 409                 vlynq_reg_write(dev->remote->control, 0);
 410                 if (vlynq_linked(dev)) {
 411                         printk(KERN_DEBUG "%s: using external clock\n",
 412                                dev->dev.bus_id);
 413                         return vlynq_setup_irq(dev);
 414                 }
 415                 break;
 416         }
 417
 418         return -ENODEV;
 419 }
 420
 421 void vlynq_device_disable(struct vlynq_device *dev)
 422 {
 423         struct plat_vlynq_ops *ops = dev->dev.platform_data;
 424
 425         vlynq_free_irq(dev);
 426         ops->off(dev);
 427 }
 428
 429 u32 vlynq_remote_id(struct vlynq_device *dev)
 430 {
 431         return vlynq_reg_read(dev->remote->chip);
 432 }
 433
 434 void vlynq_set_local_mapping(struct vlynq_device *dev, u32 tx_offset,
 435                              struct vlynq_mapping *mapping)
 436 {
 437         int i;
 438
 439         vlynq_reg_write(dev->local->tx_offset, tx_offset);
 440         for (i = 0; i < 4; i++) {
 441                 vlynq_reg_write(dev->local->rx_mapping[i].offset,
 442                                                         mapping[i].offset);
 443                 vlynq_reg_write(dev->local->rx_mapping[i].size,
 444                                                         mapping[i].size);
 445         }
 446 }
 447
 448 void vlynq_set_remote_mapping(struct vlynq_device *dev, u32 tx_offset,
 449                               struct vlynq_mapping *mapping)
 450 {
 451         int i;
 452
 453         vlynq_reg_write(dev->remote->tx_offset, tx_offset);
 454         for (i = 0; i < 4; i++) {
 455                 vlynq_reg_write(dev->remote->rx_mapping[i].offset,
 456                                                         mapping[i].offset);
 457                 vlynq_reg_write(dev->remote->rx_mapping[i].size,
 458                                                         mapping[i].size);
 459         }
 460 }
 461
 462 int vlynq_virq_to_irq(struct vlynq_device *dev, int virq)
 463 {
 464         if ((virq < 0) || (virq >= PER_DEVICE_IRQS))
 465                 return -EINVAL;
 466
 467         return dev->irq_start + virq;
 468 }
 469
 470 int vlynq_irq_to_virq(struct vlynq_device *dev, int irq)
 471 {
 472         if ((irq < dev->irq_start) || (irq >= dev->irq_start + PER_DEVICE_IRQS))
 473                 return -EINVAL;
 474
 475         return irq - dev->irq_start;
 476 }
 477
 478 int vlynq_set_local_irq(struct vlynq_device *dev, int virq)
 479 {
 480         if ((virq < 0) || (virq >= PER_DEVICE_IRQS))
 481                 return -EINVAL;
 482
 483         if (virq == dev->remote_irq)
 484                 return -EINVAL;
 485
 486         dev->local_irq = virq;
 487
 488         return 0;
 489 }
 490
 491 int vlynq_set_remote_irq(struct vlynq_device *dev, int virq)
 492 {
 493         if ((virq < 0) || (virq >= PER_DEVICE_IRQS))
 494                 return -EINVAL;
 495
 496         if (virq == dev->local_irq)
 497                 return -EINVAL;
 498
 499         dev->remote_irq = virq;
 500
 501         return 0;
 502 }
 503
 504 static int vlynq_probe(struct platform_device *pdev)
 505 {
 506         struct vlynq_device *dev;
 507         struct resource *regs_res, *mem_res, *irq_res;
 508         int len, result;
 509
 510         if (strcmp(pdev->name, "vlynq"))
 511                 return -ENODEV;
 512
 513         regs_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
 514         if (!regs_res)
 515                 return -ENODEV;
 516
 517         mem_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mem");
 518         if (!mem_res)
 519                 return -ENODEV;
 520
 521         irq_res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "devirq");
 522         if (!irq_res)
 523                 return -ENODEV;
 524
 525         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 526         if (!dev) {
 527                 printk(KERN_ERR
 528                        "vlynq: failed to allocate device structure\n");
 529                 return -ENOMEM;
 530         }
 531
 532         dev->id = pdev->id;
 533         dev->dev.bus = &vlynq_bus_type;
 534         dev->dev.parent = &pdev->dev;
 535         snprintf(dev->dev.bus_id, BUS_ID_SIZE, "vlynq%d", dev->id);
 536         dev->dev.bus_id[BUS_ID_SIZE - 1] = 0;
 537         dev->dev.platform_data = pdev->dev.platform_data;
 538         dev->dev.release = vlynq_device_release;
 539
 540         dev->regs_start = regs_res->start;
 541         dev->regs_end = regs_res->end;
 542         dev->mem_start = mem_res->start;
 543         dev->mem_end = mem_res->end;
 544
 545         len = regs_res->end - regs_res->start;
 546         if (!request_mem_region(regs_res->start, len, dev->dev.bus_id)) {
 547                 printk(KERN_ERR "%s: Can't request vlynq registers\n",
 548                        dev->dev.bus_id);
 549                 result = -ENXIO;
 550                 goto fail_request;
 551         }
 552
 553         dev->local = ioremap(regs_res->start, len);
 554         if (!dev->local) {
 555                 printk(KERN_ERR "%s: Can't remap vlynq registers\n",
 556                        dev->dev.bus_id);
 557                 result = -ENXIO;
 558                 goto fail_remap;
 559         }
 560
 561         dev->remote = (struct vlynq_regs *)((u32)dev->local +
 562                                             VLYNQ_REMOTE_OFFSET);
 563
 564         dev->irq = platform_get_irq_byname(pdev, "irq");
 565         dev->irq_start = irq_res->start;
 566         dev->irq_end = irq_res->end;
 567         dev->local_irq = 31;
 568         dev->remote_irq = 30;
 569
 570         if (device_register(&dev->dev))
 571                 goto fail_register;
 572         platform_set_drvdata(pdev, dev);
 573
 574         printk(KERN_INFO "%s: regs 0x%p, irq %d, mem 0x%p\n",
 575                dev->dev.bus_id, (void *)dev->regs_start, dev->irq,
 576                (void *)dev->mem_start);
 577
 578         return 0;
 579
 580 fail_register:
 581         iounmap(dev->local);
 582 fail_remap:
 583 fail_request:
 584         release_mem_region(regs_res->start, len);
 585         kfree(dev);
 586         return result;
 587 }
 588
 589 static int vlynq_remove(struct platform_device *pdev)
 590 {
 591         struct vlynq_device *dev = platform_get_drvdata(pdev);
 592
 593         device_unregister(&dev->dev);
 594         iounmap(dev->local);
 595         release_mem_region(dev->regs_start, dev->regs_end - dev->regs_start);
 596
 597         kfree(dev);
 598
 599         return 0;
 600 }
 601
 602 static struct platform_driver vlynq_driver = {
 603         .driver.name = "vlynq",
 604         .probe = vlynq_probe,
 605         .remove = vlynq_remove,
 606 };
 607
 608 struct bus_type vlynq_bus_type = {
 609         .name = "vlynq",
 610         .probe = vlynq_device_probe,
 611         .remove = vlynq_device_remove,
 612 };
 613 EXPORT_SYMBOL(vlynq_bus_type);
 614
 615 #ifdef CONFIG_PCI
 616 extern void vlynq_pci_init(void);
 617 #endif
 618 static int __init vlynq_init(void)
 619 {
 620         int res = 0;
 621
 622         res = bus_register(&vlynq_bus_type);
 623         if (res)
 624                 goto fail_bus;
 625
 626         res = platform_driver_register(&vlynq_driver);
 627         if (res)
 628                 goto fail_platform;
 629
 630 #ifdef CONFIG_PCI
 631         vlynq_pci_init();
 632 #endif
 633
 634         return 0;
 635
 636 fail_platform:
 637         bus_unregister(&vlynq_bus_type);
 638 fail_bus:
 639         return res;
 640 }
 641
 642 /* Add this back when vlynq-pci crap is gone */
 643 #if 0
 644 static void __devexit vlynq_exit(void)
 645 {
 646         platform_driver_unregister(&vlynq_driver);
 647         bus_unregister(&vlynq_bus_type);
 648 }
 649 #endif
 650
 651 subsys_initcall(vlynq_init);