arch/sparc/kernel/pci_fire.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* pci_fire.c: Sun4u platform PCI-E controller support.
   3  *
   4  * Copyright (C) 2007 David S. Miller (davem@davemloft.net)
   5  */
   6 #include <linux/kernel.h>
   7 #include <linux/pci.h>
   8 #include <linux/slab.h>
   9 #include <linux/init.h>
  10 #include <linux/msi.h>
  11 #include <linux/export.h>
  12 #include <linux/irq.h>
  13 #include <linux/of.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/numa.h>
  16
  17 #include <asm/prom.h>
  18 #include <asm/irq.h>
  19 #include <asm/upa.h>
  20
  21 #include "pci_impl.h"
  22
  23 #define DRIVER_NAME     "fire"
  24 #define PFX             DRIVER_NAME ": "
  25
  26 #define FIRE_IOMMU_CONTROL      0x40000UL
  27 #define FIRE_IOMMU_TSBBASE      0x40008UL
  28 #define FIRE_IOMMU_FLUSH        0x40100UL
  29 #define FIRE_IOMMU_FLUSHINV     0x40108UL
  30
  31 static int pci_fire_pbm_iommu_init(struct pci_pbm_info *pbm)
  32 {
  33         struct iommu *iommu = pbm->iommu;
  34         u32 vdma[2], dma_mask;
  35         u64 control;
  36         int tsbsize, err;
  37
  38         /* No virtual-dma property on these guys, use largest size.  */
  39         vdma[0] = 0xc0000000; /* base */
  40         vdma[1] = 0x40000000; /* size */
  41         dma_mask = 0xffffffff;
  42         tsbsize = 128;
  43
  44         /* Register addresses. */
  45         iommu->iommu_control  = pbm->pbm_regs + FIRE_IOMMU_CONTROL;
  46         iommu->iommu_tsbbase  = pbm->pbm_regs + FIRE_IOMMU_TSBBASE;
  47         iommu->iommu_flush    = pbm->pbm_regs + FIRE_IOMMU_FLUSH;
  48         iommu->iommu_flushinv = pbm->pbm_regs + FIRE_IOMMU_FLUSHINV;
  49
  50         /* We use the main control/status register of FIRE as the write
  51          * completion register.
  52          */
  53         iommu->write_complete_reg = pbm->controller_regs + 0x410000UL;
  54
  55         /*
  56          * Invalidate TLB Entries.
  57          */
  58         upa_writeq(~(u64)0, iommu->iommu_flushinv);
  59
  60         err = iommu_table_init(iommu, tsbsize * 8 * 1024, vdma[0], dma_mask,
  61                                pbm->numa_node);
  62         if (err)
  63                 return err;
  64
  65         upa_writeq(__pa(iommu->page_table) | 0x7UL, iommu->iommu_tsbbase);
  66
  67         control = upa_readq(iommu->iommu_control);
  68         control |= (0x00000400 /* TSB cache snoop enable */     |
  69                     0x00000300 /* Cache mode */                 |
  70                     0x00000002 /* Bypass enable */              |
  71                     0x00000001 /* Translation enable */);
  72         upa_writeq(control, iommu->iommu_control);
  73
  74         return 0;
  75 }
  76
  77 #ifdef CONFIG_PCI_MSI
  78 struct pci_msiq_entry {
  79         u64             word0;
  80 #define MSIQ_WORD0_RESV                 0x8000000000000000UL
  81 #define MSIQ_WORD0_FMT_TYPE             0x7f00000000000000UL
  82 #define MSIQ_WORD0_FMT_TYPE_SHIFT       56
  83 #define MSIQ_WORD0_LEN                  0x00ffc00000000000UL
  84 #define MSIQ_WORD0_LEN_SHIFT            46
  85 #define MSIQ_WORD0_ADDR0                0x00003fff00000000UL
  86 #define MSIQ_WORD0_ADDR0_SHIFT          32
  87 #define MSIQ_WORD0_RID                  0x00000000ffff0000UL
  88 #define MSIQ_WORD0_RID_SHIFT            16
  89 #define MSIQ_WORD0_DATA0                0x000000000000ffffUL
  90 #define MSIQ_WORD0_DATA0_SHIFT          0
  91
  92 #define MSIQ_TYPE_MSG                   0x6
  93 #define MSIQ_TYPE_MSI32                 0xb
  94 #define MSIQ_TYPE_MSI64                 0xf
  95
  96         u64             word1;
  97 #define MSIQ_WORD1_ADDR1                0xffffffffffff0000UL
  98 #define MSIQ_WORD1_ADDR1_SHIFT          16
  99 #define MSIQ_WORD1_DATA1                0x000000000000ffffUL
 100 #define MSIQ_WORD1_DATA1_SHIFT          0
 101
 102         u64             resv[6];
 103 };
 104
 105 /* All MSI registers are offset from pbm->pbm_regs */
 106 #define EVENT_QUEUE_BASE_ADDR_REG       0x010000UL
 107 #define  EVENT_QUEUE_BASE_ADDR_ALL_ONES 0xfffc000000000000UL
 108
 109 #define EVENT_QUEUE_CONTROL_SET(EQ)     (0x011000UL + (EQ) * 0x8UL)
 110 #define  EVENT_QUEUE_CONTROL_SET_OFLOW  0x0200000000000000UL
 111 #define  EVENT_QUEUE_CONTROL_SET_EN     0x0000100000000000UL
 112
 113 #define EVENT_QUEUE_CONTROL_CLEAR(EQ)   (0x011200UL + (EQ) * 0x8UL)
 114 #define  EVENT_QUEUE_CONTROL_CLEAR_OF   0x0200000000000000UL
 115 #define  EVENT_QUEUE_CONTROL_CLEAR_E2I  0x0000800000000000UL
 116 #define  EVENT_QUEUE_CONTROL_CLEAR_DIS  0x0000100000000000UL
 117
 118 #define EVENT_QUEUE_STATE(EQ)           (0x011400UL + (EQ) * 0x8UL)
 119 #define  EVENT_QUEUE_STATE_MASK         0x0000000000000007UL
 120 #define  EVENT_QUEUE_STATE_IDLE         0x0000000000000001UL
 121 #define  EVENT_QUEUE_STATE_ACTIVE       0x0000000000000002UL
 122 #define  EVENT_QUEUE_STATE_ERROR        0x0000000000000004UL
 123
 124 #define EVENT_QUEUE_TAIL(EQ)            (0x011600UL + (EQ) * 0x8UL)
 125 #define  EVENT_QUEUE_TAIL_OFLOW         0x0200000000000000UL
 126 #define  EVENT_QUEUE_TAIL_VAL           0x000000000000007fUL
 127
 128 #define EVENT_QUEUE_HEAD(EQ)            (0x011800UL + (EQ) * 0x8UL)
 129 #define  EVENT_QUEUE_HEAD_VAL           0x000000000000007fUL
 130
 131 #define MSI_MAP(MSI)                    (0x020000UL + (MSI) * 0x8UL)
 132 #define  MSI_MAP_VALID                  0x8000000000000000UL
 133 #define  MSI_MAP_EQWR_N                 0x4000000000000000UL
 134 #define  MSI_MAP_EQNUM                  0x000000000000003fUL
 135
 136 #define MSI_CLEAR(MSI)                  (0x028000UL + (MSI) * 0x8UL)
 137 #define  MSI_CLEAR_EQWR_N               0x4000000000000000UL
 138
 139 #define IMONDO_DATA0                    0x02C000UL
 140 #define  IMONDO_DATA0_DATA              0xffffffffffffffc0UL
 141
 142 #define IMONDO_DATA1                    0x02C008UL
 143 #define  IMONDO_DATA1_DATA              0xffffffffffffffffUL
 144
 145 #define MSI_32BIT_ADDR                  0x034000UL
 146 #define  MSI_32BIT_ADDR_VAL             0x00000000ffff0000UL
 147
 148 #define MSI_64BIT_ADDR                  0x034008UL
 149 #define  MSI_64BIT_ADDR_VAL             0xffffffffffff0000UL
 150
 151 static int pci_fire_get_head(struct pci_pbm_info *pbm, unsigned long msiqid,
 152                              unsigned long *head)
 153 {
 154         *head = upa_readq(pbm->pbm_regs + EVENT_QUEUE_HEAD(msiqid));
 155         return 0;
 156 }
 157
 158 static int pci_fire_dequeue_msi(struct pci_pbm_info *pbm, unsigned long msiqid,
 159                                 unsigned long *head, unsigned long *msi)
 160 {
 161         unsigned long type_fmt, type, msi_num;
 162         struct pci_msiq_entry *base, *ep;
 163
 164         base = (pbm->msi_queues + ((msiqid - pbm->msiq_first) * 8192));
 165         ep = &base[*head];
 166
 167         if ((ep->word0 & MSIQ_WORD0_FMT_TYPE) == 0)
 168                 return 0;
 169
 170         type_fmt = ((ep->word0 & MSIQ_WORD0_FMT_TYPE) >>
 171                     MSIQ_WORD0_FMT_TYPE_SHIFT);
 172         type = (type_fmt >> 3);
 173         if (unlikely(type != MSIQ_TYPE_MSI32 &&
 174                      type != MSIQ_TYPE_MSI64))
 175                 return -EINVAL;
 176
 177         *msi = msi_num = ((ep->word0 & MSIQ_WORD0_DATA0) >>
 178                           MSIQ_WORD0_DATA0_SHIFT);
 179
 180         upa_writeq(MSI_CLEAR_EQWR_N, pbm->pbm_regs + MSI_CLEAR(msi_num));
 181
 182         /* Clear the entry.  */
 183         ep->word0 &= ~MSIQ_WORD0_FMT_TYPE;
 184
 185         /* Go to next entry in ring.  */
 186         (*head)++;
 187         if (*head >= pbm->msiq_ent_count)
 188                 *head = 0;
 189
 190         return 1;
 191 }
 192
 193 static int pci_fire_set_head(struct pci_pbm_info *pbm, unsigned long msiqid,
 194                              unsigned long head)
 195 {
 196         upa_writeq(head, pbm->pbm_regs + EVENT_QUEUE_HEAD(msiqid));
 197         return 0;
 198 }
 199
 200 static int pci_fire_msi_setup(struct pci_pbm_info *pbm, unsigned long msiqid,
 201                               unsigned long msi, int is_msi64)
 202 {
 203         u64 val;
 204
 205         val = upa_readq(pbm->pbm_regs + MSI_MAP(msi));
 206         val &= ~(MSI_MAP_EQNUM);
 207         val |= msiqid;
 208         upa_writeq(val, pbm->pbm_regs + MSI_MAP(msi));
 209
 210         upa_writeq(MSI_CLEAR_EQWR_N, pbm->pbm_regs + MSI_CLEAR(msi));
 211
 212         val = upa_readq(pbm->pbm_regs + MSI_MAP(msi));
 213         val |= MSI_MAP_VALID;
 214         upa_writeq(val, pbm->pbm_regs + MSI_MAP(msi));
 215
 216         return 0;
 217 }
 218
 219 static int pci_fire_msi_teardown(struct pci_pbm_info *pbm, unsigned long msi)
 220 {
 221         u64 val;
 222
 223         val = upa_readq(pbm->pbm_regs + MSI_MAP(msi));
 224
 225         val &= ~MSI_MAP_VALID;
 226
 227         upa_writeq(val, pbm->pbm_regs + MSI_MAP(msi));
 228
 229         return 0;
 230 }
 231
 232 static int pci_fire_msiq_alloc(struct pci_pbm_info *pbm)
 233 {
 234         unsigned long pages, order, i;
 235
 236         order = get_order(512 * 1024);
 237         pages = __get_free_pages(GFP_KERNEL | __GFP_COMP, order);
 238         if (pages == 0UL) {
 239                 printk(KERN_ERR "MSI: Cannot allocate MSI queues (o=%lu).\n",
 240                        order);
 241                 return -ENOMEM;
 242         }
 243         memset((char *)pages, 0, PAGE_SIZE << order);
 244         pbm->msi_queues = (void *) pages;
 245
 246         upa_writeq((EVENT_QUEUE_BASE_ADDR_ALL_ONES |
 247                     __pa(pbm->msi_queues)),
 248                    pbm->pbm_regs + EVENT_QUEUE_BASE_ADDR_REG);
 249
 250         upa_writeq(pbm->portid << 6, pbm->pbm_regs + IMONDO_DATA0);
 251         upa_writeq(0, pbm->pbm_regs + IMONDO_DATA1);
 252
 253         upa_writeq(pbm->msi32_start, pbm->pbm_regs + MSI_32BIT_ADDR);
 254         upa_writeq(pbm->msi64_start, pbm->pbm_regs + MSI_64BIT_ADDR);
 255
 256         for (i = 0; i < pbm->msiq_num; i++) {
 257                 upa_writeq(0, pbm->pbm_regs + EVENT_QUEUE_HEAD(i));
 258                 upa_writeq(0, pbm->pbm_regs + EVENT_QUEUE_TAIL(i));
 259         }
 260
 261         return 0;
 262 }
 263
 264 static void pci_fire_msiq_free(struct pci_pbm_info *pbm)
 265 {
 266         unsigned long pages, order;
 267
 268         order = get_order(512 * 1024);
 269         pages = (unsigned long) pbm->msi_queues;
 270
 271         free_pages(pages, order);
 272
 273         pbm->msi_queues = NULL;
 274 }
 275
 276 static int pci_fire_msiq_build_irq(struct pci_pbm_info *pbm,
 277                                    unsigned long msiqid,
 278                                    unsigned long devino)
 279 {
 280         unsigned long cregs = (unsigned long) pbm->pbm_regs;
 281         unsigned long imap_reg, iclr_reg, int_ctrlr;
 282         unsigned int irq;
 283         int fixup;
 284         u64 val;
 285
 286         imap_reg = cregs + (0x001000UL + (devino * 0x08UL));
 287         iclr_reg = cregs + (0x001400UL + (devino * 0x08UL));
 288
 289         /* XXX iterate amongst the 4 IRQ controllers XXX */
 290         int_ctrlr = (1UL << 6);
 291
 292         val = upa_readq(imap_reg);
 293         val |= (1UL << 63) | int_ctrlr;
 294         upa_writeq(val, imap_reg);
 295
 296         fixup = ((pbm->portid << 6) | devino) - int_ctrlr;
 297
 298         irq = build_irq(fixup, iclr_reg, imap_reg);
 299         if (!irq)
 300                 return -ENOMEM;
 301
 302         upa_writeq(EVENT_QUEUE_CONTROL_SET_EN,
 303                    pbm->pbm_regs + EVENT_QUEUE_CONTROL_SET(msiqid));
 304
 305         return irq;
 306 }
 307
 308 static const struct sparc64_msiq_ops pci_fire_msiq_ops = {
 309         .get_head       =       pci_fire_get_head,
 310         .dequeue_msi    =       pci_fire_dequeue_msi,
 311         .set_head       =       pci_fire_set_head,
 312         .msi_setup      =       pci_fire_msi_setup,
 313         .msi_teardown   =       pci_fire_msi_teardown,
 314         .msiq_alloc     =       pci_fire_msiq_alloc,
 315         .msiq_free      =       pci_fire_msiq_free,
 316         .msiq_build_irq =       pci_fire_msiq_build_irq,
 317 };
 318
 319 static void pci_fire_msi_init(struct pci_pbm_info *pbm)
 320 {
 321         sparc64_pbm_msi_init(pbm, &pci_fire_msiq_ops);
 322 }
 323 #else /* CONFIG_PCI_MSI */
 324 static void pci_fire_msi_init(struct pci_pbm_info *pbm)
 325 {
 326 }
 327 #endif /* !(CONFIG_PCI_MSI) */
 328
 329 /* Based at pbm->controller_regs */
 330 #define FIRE_PARITY_CONTROL     0x470010UL
 331 #define  FIRE_PARITY_ENAB       0x8000000000000000UL
 332 #define FIRE_FATAL_RESET_CTL    0x471028UL
 333 #define  FIRE_FATAL_RESET_SPARE 0x0000000004000000UL
 334 #define  FIRE_FATAL_RESET_MB    0x0000000002000000UL
 335 #define  FIRE_FATAL_RESET_CPE   0x0000000000008000UL
 336 #define  FIRE_FATAL_RESET_APE   0x0000000000004000UL
 337 #define  FIRE_FATAL_RESET_PIO   0x0000000000000040UL
 338 #define  FIRE_FATAL_RESET_JW    0x0000000000000004UL
 339 #define  FIRE_FATAL_RESET_JI    0x0000000000000002UL
 340 #define  FIRE_FATAL_RESET_JR    0x0000000000000001UL
 341 #define FIRE_CORE_INTR_ENABLE   0x471800UL
 342
 343 /* Based at pbm->pbm_regs */
 344 #define FIRE_TLU_CTRL           0x80000UL
 345 #define  FIRE_TLU_CTRL_TIM      0x00000000da000000UL
 346 #define  FIRE_TLU_CTRL_QDET     0x0000000000000100UL
 347 #define  FIRE_TLU_CTRL_CFG      0x0000000000000001UL
 348 #define FIRE_TLU_DEV_CTRL       0x90008UL
 349 #define FIRE_TLU_LINK_CTRL      0x90020UL
 350 #define FIRE_TLU_LINK_CTRL_CLK  0x0000000000000040UL
 351 #define FIRE_LPU_RESET          0xe2008UL
 352 #define FIRE_LPU_LLCFG          0xe2200UL
 353 #define  FIRE_LPU_LLCFG_VC0     0x0000000000000100UL
 354 #define FIRE_LPU_FCTRL_UCTRL    0xe2240UL
 355 #define  FIRE_LPU_FCTRL_UCTRL_N 0x0000000000000002UL
 356 #define  FIRE_LPU_FCTRL_UCTRL_P 0x0000000000000001UL
 357 #define FIRE_LPU_TXL_FIFOP      0xe2430UL
 358 #define FIRE_LPU_LTSSM_CFG2     0xe2788UL
 359 #define FIRE_LPU_LTSSM_CFG3     0xe2790UL
 360 #define FIRE_LPU_LTSSM_CFG4     0xe2798UL
 361 #define FIRE_LPU_LTSSM_CFG5     0xe27a0UL
 362 #define FIRE_DMC_IENAB          0x31800UL
 363 #define FIRE_DMC_DBG_SEL_A      0x53000UL
 364 #define FIRE_DMC_DBG_SEL_B      0x53008UL
 365 #define FIRE_PEC_IENAB          0x51800UL
 366
 367 static void pci_fire_hw_init(struct pci_pbm_info *pbm)
 368 {
 369         u64 val;
 370
 371         upa_writeq(FIRE_PARITY_ENAB,
 372                    pbm->controller_regs + FIRE_PARITY_CONTROL);
 373
 374         upa_writeq((FIRE_FATAL_RESET_SPARE |
 375                     FIRE_FATAL_RESET_MB |
 376                     FIRE_FATAL_RESET_CPE |
 377                     FIRE_FATAL_RESET_APE |
 378                     FIRE_FATAL_RESET_PIO |
 379                     FIRE_FATAL_RESET_JW |
 380                     FIRE_FATAL_RESET_JI |
 381                     FIRE_FATAL_RESET_JR),
 382                    pbm->controller_regs + FIRE_FATAL_RESET_CTL);
 383
 384         upa_writeq(~(u64)0, pbm->controller_regs + FIRE_CORE_INTR_ENABLE);
 385
 386         val = upa_readq(pbm->pbm_regs + FIRE_TLU_CTRL);
 387         val |= (FIRE_TLU_CTRL_TIM |
 388                 FIRE_TLU_CTRL_QDET |
 389                 FIRE_TLU_CTRL_CFG);
 390         upa_writeq(val, pbm->pbm_regs + FIRE_TLU_CTRL);
 391         upa_writeq(0, pbm->pbm_regs + FIRE_TLU_DEV_CTRL);
 392         upa_writeq(FIRE_TLU_LINK_CTRL_CLK,
 393                    pbm->pbm_regs + FIRE_TLU_LINK_CTRL);
 394
 395         upa_writeq(0, pbm->pbm_regs + FIRE_LPU_RESET);
 396         upa_writeq(FIRE_LPU_LLCFG_VC0, pbm->pbm_regs + FIRE_LPU_LLCFG);
 397         upa_writeq((FIRE_LPU_FCTRL_UCTRL_N | FIRE_LPU_FCTRL_UCTRL_P),
 398                    pbm->pbm_regs + FIRE_LPU_FCTRL_UCTRL);
 399         upa_writeq(((0xffff << 16) | (0x0000 << 0)),
 400                    pbm->pbm_regs + FIRE_LPU_TXL_FIFOP);
 401         upa_writeq(3000000, pbm->pbm_regs + FIRE_LPU_LTSSM_CFG2);
 402         upa_writeq(500000, pbm->pbm_regs + FIRE_LPU_LTSSM_CFG3);
 403         upa_writeq((2 << 16) | (140 << 8),
 404                    pbm->pbm_regs + FIRE_LPU_LTSSM_CFG4);
 405         upa_writeq(0, pbm->pbm_regs + FIRE_LPU_LTSSM_CFG5);
 406
 407         upa_writeq(~(u64)0, pbm->pbm_regs + FIRE_DMC_IENAB);
 408         upa_writeq(0, pbm->pbm_regs + FIRE_DMC_DBG_SEL_A);
 409         upa_writeq(0, pbm->pbm_regs + FIRE_DMC_DBG_SEL_B);
 410
 411         upa_writeq(~(u64)0, pbm->pbm_regs + FIRE_PEC_IENAB);
 412 }
 413
 414 static int pci_fire_pbm_init(struct pci_pbm_info *pbm,
 415                              struct platform_device *op, u32 portid)
 416 {
 417         const struct linux_prom64_registers *regs;
 418         struct device_node *dp = op->dev.of_node;
 419         int err;
 420
 421         pbm->numa_node = NUMA_NO_NODE;
 422
 423         pbm->pci_ops = &sun4u_pci_ops;
 424         pbm->config_space_reg_bits = 12;
 425
 426         pbm->index = pci_num_pbms++;
 427
 428         pbm->portid = portid;
 429         pbm->op = op;
 430         pbm->name = dp->full_name;
 431
 432         regs = of_get_property(dp, "reg", NULL);
 433         pbm->pbm_regs = regs[0].phys_addr;
 434         pbm->controller_regs = regs[1].phys_addr - 0x410000UL;
 435
 436         printk("%s: SUN4U PCIE Bus Module\n", pbm->name);
 437
 438         pci_determine_mem_io_space(pbm);
 439
 440         pci_get_pbm_props(pbm);
 441
 442         pci_fire_hw_init(pbm);
 443
 444         err = pci_fire_pbm_iommu_init(pbm);
 445         if (err)
 446                 return err;
 447
 448         pci_fire_msi_init(pbm);
 449
 450         pbm->pci_bus = pci_scan_one_pbm(pbm, &op->dev);
 451
 452         /* XXX register error interrupt handlers XXX */
 453
 454         pbm->next = pci_pbm_root;
 455         pci_pbm_root = pbm;
 456
 457         return 0;
 458 }
 459
 460 static int fire_probe(struct platform_device *op)
 461 {
 462         struct device_node *dp = op->dev.of_node;
 463         struct pci_pbm_info *pbm;
 464         struct iommu *iommu;
 465         u32 portid;
 466         int err;
 467
 468         portid = of_getintprop_default(dp, "portid", 0xff);
 469
 470         err = -ENOMEM;
 471         pbm = kzalloc(sizeof(*pbm), GFP_KERNEL);
 472         if (!pbm) {
 473                 printk(KERN_ERR PFX "Cannot allocate pci_pbminfo.\n");
 474                 goto out_err;
 475         }
 476
 477         iommu = kzalloc(sizeof(struct iommu), GFP_KERNEL);
 478         if (!iommu) {
 479                 printk(KERN_ERR PFX "Cannot allocate PBM iommu.\n");
 480                 goto out_free_controller;
 481         }
 482
 483         pbm->iommu = iommu;
 484
 485         err = pci_fire_pbm_init(pbm, op, portid);
 486         if (err)
 487                 goto out_free_iommu;
 488
 489         dev_set_drvdata(&op->dev, pbm);
 490
 491         return 0;
 492
 493 out_free_iommu:
 494         kfree(pbm->iommu);
 495
 496 out_free_controller:
 497         kfree(pbm);
 498
 499 out_err:
 500         return err;
 501 }
 502
 503 static const struct of_device_id fire_match[] = {
 504         {
 505                 .name = "pci",
 506                 .compatible = "pciex108e,80f0",
 507         },
 508         {},
 509 };
 510
 511 static struct platform_driver fire_driver = {
 512         .driver = {
 513                 .name = DRIVER_NAME,
 514                 .of_match_table = fire_match,
 515         },
 516         .probe          = fire_probe,
 517 };
 518
 519 static int __init fire_init(void)
 520 {
 521         return platform_driver_register(&fire_driver);
 522 }
 523
 524 subsys_initcall(fire_init);