arch/powerpc/sysdev/fsl_rio.c

   1 /*
   2  * Freescale MPC85xx/MPC86xx RapidIO support
   3  *
   4  * Copyright (C) 2007, 2008 Freescale Semiconductor, Inc.
   5  * Zhang Wei <wei.zhang@freescale.com>
   6  *
   7  * Copyright 2005 MontaVista Software, Inc.
   8  * Matt Porter <mporter@kernel.crashing.org>
   9  *
  10  * This program is free software; you can redistribute  it and/or modify it
  11  * under  the terms of  the GNU General  Public License as published by the
  12  * Free Software Foundation;  either version 2 of the  License, or (at your
  13  * option) any later version.
  14  */
  15
  16 #include <linux/init.h>
  17 #include <linux/module.h>
  18 #include <linux/types.h>
  19 #include <linux/dma-mapping.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/device.h>
  22 #include <linux/rio.h>
  23 #include <linux/rio_drv.h>
  24 #include <linux/of_platform.h>
  25 #include <linux/delay.h>
  26
  27 #include <asm/io.h>
  28
  29 /* RapidIO definition irq, which read from OF-tree */
  30 #define IRQ_RIO_BELL(m)         (((struct rio_priv *)(m->priv))->bellirq)
  31 #define IRQ_RIO_TX(m)           (((struct rio_priv *)(m->priv))->txirq)
  32 #define IRQ_RIO_RX(m)           (((struct rio_priv *)(m->priv))->rxirq)
  33
  34 #define RIO_ATMU_REGS_OFFSET    0x10c00
  35 #define RIO_P_MSG_REGS_OFFSET   0x11000
  36 #define RIO_S_MSG_REGS_OFFSET   0x13000
  37 #define RIO_ESCSR               0x158
  38 #define RIO_CCSR                0x15c
  39 #define RIO_ISR_AACR            0x10120
  40 #define RIO_ISR_AACR_AA         0x1     /* Accept All ID */
  41 #define RIO_MAINT_WIN_SIZE      0x400000
  42 #define RIO_DBELL_WIN_SIZE      0x1000
  43
  44 #define RIO_MSG_OMR_MUI         0x00000002
  45 #define RIO_MSG_OSR_TE          0x00000080
  46 #define RIO_MSG_OSR_QOI         0x00000020
  47 #define RIO_MSG_OSR_QFI         0x00000010
  48 #define RIO_MSG_OSR_MUB         0x00000004
  49 #define RIO_MSG_OSR_EOMI        0x00000002
  50 #define RIO_MSG_OSR_QEI         0x00000001
  51
  52 #define RIO_MSG_IMR_MI          0x00000002
  53 #define RIO_MSG_ISR_TE          0x00000080
  54 #define RIO_MSG_ISR_QFI         0x00000010
  55 #define RIO_MSG_ISR_DIQI        0x00000001
  56
  57 #define RIO_MSG_DESC_SIZE       32
  58 #define RIO_MSG_BUFFER_SIZE     4096
  59 #define RIO_MIN_TX_RING_SIZE    2
  60 #define RIO_MAX_TX_RING_SIZE    2048
  61 #define RIO_MIN_RX_RING_SIZE    2
  62 #define RIO_MAX_RX_RING_SIZE    2048
  63
  64 #define DOORBELL_DMR_DI         0x00000002
  65 #define DOORBELL_DSR_TE         0x00000080
  66 #define DOORBELL_DSR_QFI        0x00000010
  67 #define DOORBELL_DSR_DIQI       0x00000001
  68 #define DOORBELL_TID_OFFSET     0x02
  69 #define DOORBELL_SID_OFFSET     0x04
  70 #define DOORBELL_INFO_OFFSET    0x06
  71
  72 #define DOORBELL_MESSAGE_SIZE   0x08
  73 #define DBELL_SID(x)            (*(u16 *)(x + DOORBELL_SID_OFFSET))
  74 #define DBELL_TID(x)            (*(u16 *)(x + DOORBELL_TID_OFFSET))
  75 #define DBELL_INF(x)            (*(u16 *)(x + DOORBELL_INFO_OFFSET))
  76
  77 struct rio_atmu_regs {
  78         u32 rowtar;
  79         u32 rowtear;
  80         u32 rowbar;
  81         u32 pad2;
  82         u32 rowar;
  83         u32 pad3[3];
  84 };
  85
  86 struct rio_msg_regs {
  87         u32 omr;
  88         u32 osr;
  89         u32 pad1;
  90         u32 odqdpar;
  91         u32 pad2;
  92         u32 osar;
  93         u32 odpr;
  94         u32 odatr;
  95         u32 odcr;
  96         u32 pad3;
  97         u32 odqepar;
  98         u32 pad4[13];
  99         u32 imr;
 100         u32 isr;
 101         u32 pad5;
 102         u32 ifqdpar;
 103         u32 pad6;
 104         u32 ifqepar;
 105         u32 pad7[226];
 106         u32 odmr;
 107         u32 odsr;
 108         u32 res0[4];
 109         u32 oddpr;
 110         u32 oddatr;
 111         u32 res1[3];
 112         u32 odretcr;
 113         u32 res2[12];
 114         u32 dmr;
 115         u32 dsr;
 116         u32 pad8;
 117         u32 dqdpar;
 118         u32 pad9;
 119         u32 dqepar;
 120         u32 pad10[26];
 121         u32 pwmr;
 122         u32 pwsr;
 123         u32 pad11;
 124         u32 pwqbar;
 125 };
 126
 127 struct rio_tx_desc {
 128         u32 res1;
 129         u32 saddr;
 130         u32 dport;
 131         u32 dattr;
 132         u32 res2;
 133         u32 res3;
 134         u32 dwcnt;
 135         u32 res4;
 136 };
 137
 138 struct rio_dbell_ring {
 139         void *virt;
 140         dma_addr_t phys;
 141 };
 142
 143 struct rio_msg_tx_ring {
 144         void *virt;
 145         dma_addr_t phys;
 146         void *virt_buffer[RIO_MAX_TX_RING_SIZE];
 147         dma_addr_t phys_buffer[RIO_MAX_TX_RING_SIZE];
 148         int tx_slot;
 149         int size;
 150         void *dev_id;
 151 };
 152
 153 struct rio_msg_rx_ring {
 154         void *virt;
 155         dma_addr_t phys;
 156         void *virt_buffer[RIO_MAX_RX_RING_SIZE];
 157         int rx_slot;
 158         int size;
 159         void *dev_id;
 160 };
 161
 162 struct rio_priv {
 163         struct device *dev;
 164         void __iomem *regs_win;
 165         struct rio_atmu_regs __iomem *atmu_regs;
 166         struct rio_atmu_regs __iomem *maint_atmu_regs;
 167         struct rio_atmu_regs __iomem *dbell_atmu_regs;
 168         void __iomem *dbell_win;
 169         void __iomem *maint_win;
 170         struct rio_msg_regs __iomem *msg_regs;
 171         struct rio_dbell_ring dbell_ring;
 172         struct rio_msg_tx_ring msg_tx_ring;
 173         struct rio_msg_rx_ring msg_rx_ring;
 174         int bellirq;
 175         int txirq;
 176         int rxirq;
 177 };
 178
 179 /**
 180  * fsl_rio_doorbell_send - Send a MPC85xx doorbell message
 181  * @mport: RapidIO master port info
 182  * @index: ID of RapidIO interface
 183  * @destid: Destination ID of target device
 184  * @data: 16-bit info field of RapidIO doorbell message
 185  *
 186  * Sends a MPC85xx doorbell message. Returns %0 on success or
 187  * %-EINVAL on failure.
 188  */
 189 static int fsl_rio_doorbell_send(struct rio_mport *mport,
 190                                 int index, u16 destid, u16 data)
 191 {
 192         struct rio_priv *priv = mport->priv;
 193         pr_debug("fsl_doorbell_send: index %d destid %4.4x data %4.4x\n",
 194                  index, destid, data);
 195         switch (mport->phy_type) {
 196         case RIO_PHY_PARALLEL:
 197                 out_be32(&priv->dbell_atmu_regs->rowtar, destid << 22);
 198                 out_be16(priv->dbell_win, data);
 199                 break;
 200         case RIO_PHY_SERIAL:
 201                 /* In the serial version silicons, such as MPC8548, MPC8641,
 202                  * below operations is must be.
 203                  */
 204                 out_be32(&priv->msg_regs->odmr, 0x00000000);
 205                 out_be32(&priv->msg_regs->odretcr, 0x00000004);
 206                 out_be32(&priv->msg_regs->oddpr, destid << 16);
 207                 out_be32(&priv->msg_regs->oddatr, data);
 208                 out_be32(&priv->msg_regs->odmr, 0x00000001);
 209                 break;
 210         }
 211
 212         return 0;
 213 }
 214
 215 /**
 216  * fsl_local_config_read - Generate a MPC85xx local config space read
 217  * @mport: RapidIO master port info
 218  * @index: ID of RapdiIO interface
 219  * @offset: Offset into configuration space
 220  * @len: Length (in bytes) of the maintenance transaction
 221  * @data: Value to be read into
 222  *
 223  * Generates a MPC85xx local configuration space read. Returns %0 on
 224  * success or %-EINVAL on failure.
 225  */
 226 static int fsl_local_config_read(struct rio_mport *mport,
 227                                 int index, u32 offset, int len, u32 *data)
 228 {
 229         struct rio_priv *priv = mport->priv;
 230         pr_debug("fsl_local_config_read: index %d offset %8.8x\n", index,
 231                  offset);
 232         *data = in_be32(priv->regs_win + offset);
 233
 234         return 0;
 235 }
 236
 237 /**
 238  * fsl_local_config_write - Generate a MPC85xx local config space write
 239  * @mport: RapidIO master port info
 240  * @index: ID of RapdiIO interface
 241  * @offset: Offset into configuration space
 242  * @len: Length (in bytes) of the maintenance transaction
 243  * @data: Value to be written
 244  *
 245  * Generates a MPC85xx local configuration space write. Returns %0 on
 246  * success or %-EINVAL on failure.
 247  */
 248 static int fsl_local_config_write(struct rio_mport *mport,
 249                                 int index, u32 offset, int len, u32 data)
 250 {
 251         struct rio_priv *priv = mport->priv;
 252         pr_debug
 253             ("fsl_local_config_write: index %d offset %8.8x data %8.8x\n",
 254              index, offset, data);
 255         out_be32(priv->regs_win + offset, data);
 256
 257         return 0;
 258 }
 259
 260 /**
 261  * fsl_rio_config_read - Generate a MPC85xx read maintenance transaction
 262  * @mport: RapidIO master port info
 263  * @index: ID of RapdiIO interface
 264  * @destid: Destination ID of transaction
 265  * @hopcount: Number of hops to target device
 266  * @offset: Offset into configuration space
 267  * @len: Length (in bytes) of the maintenance transaction
 268  * @val: Location to be read into
 269  *
 270  * Generates a MPC85xx read maintenance transaction. Returns %0 on
 271  * success or %-EINVAL on failure.
 272  */
 273 static int
 274 fsl_rio_config_read(struct rio_mport *mport, int index, u16 destid,
 275                         u8 hopcount, u32 offset, int len, u32 *val)
 276 {
 277         struct rio_priv *priv = mport->priv;
 278         u8 *data;
 279
 280         pr_debug
 281             ("fsl_rio_config_read: index %d destid %d hopcount %d offset %8.8x len %d\n",
 282              index, destid, hopcount, offset, len);
 283         out_be32(&priv->maint_atmu_regs->rowtar,
 284                  (destid << 22) | (hopcount << 12) | ((offset & ~0x3) >> 9));
 285
 286         data = (u8 *) priv->maint_win + offset;
 287         switch (len) {
 288         case 1:
 289                 *val = in_8((u8 *) data);
 290                 break;
 291         case 2:
 292                 *val = in_be16((u16 *) data);
 293                 break;
 294         default:
 295                 *val = in_be32((u32 *) data);
 296                 break;
 297         }
 298
 299         return 0;
 300 }
 301
 302 /**
 303  * fsl_rio_config_write - Generate a MPC85xx write maintenance transaction
 304  * @mport: RapidIO master port info
 305  * @index: ID of RapdiIO interface
 306  * @destid: Destination ID of transaction
 307  * @hopcount: Number of hops to target device
 308  * @offset: Offset into configuration space
 309  * @len: Length (in bytes) of the maintenance transaction
 310  * @val: Value to be written
 311  *
 312  * Generates an MPC85xx write maintenance transaction. Returns %0 on
 313  * success or %-EINVAL on failure.
 314  */
 315 static int
 316 fsl_rio_config_write(struct rio_mport *mport, int index, u16 destid,
 317                         u8 hopcount, u32 offset, int len, u32 val)
 318 {
 319         struct rio_priv *priv = mport->priv;
 320         u8 *data;
 321         pr_debug
 322             ("fsl_rio_config_write: index %d destid %d hopcount %d offset %8.8x len %d val %8.8x\n",
 323              index, destid, hopcount, offset, len, val);
 324         out_be32(&priv->maint_atmu_regs->rowtar,
 325                  (destid << 22) | (hopcount << 12) | ((offset & ~0x3) >> 9));
 326
 327         data = (u8 *) priv->maint_win + offset;
 328         switch (len) {
 329         case 1:
 330                 out_8((u8 *) data, val);
 331                 break;
 332         case 2:
 333                 out_be16((u16 *) data, val);
 334                 break;
 335         default:
 336                 out_be32((u32 *) data, val);
 337                 break;
 338         }
 339
 340         return 0;
 341 }
 342
 343 /**
 344  * rio_hw_add_outb_message - Add message to the MPC85xx outbound message queue
 345  * @mport: Master port with outbound message queue
 346  * @rdev: Target of outbound message
 347  * @mbox: Outbound mailbox
 348  * @buffer: Message to add to outbound queue
 349  * @len: Length of message
 350  *
 351  * Adds the @buffer message to the MPC85xx outbound message queue. Returns
 352  * %0 on success or %-EINVAL on failure.
 353  */
 354 int
 355 rio_hw_add_outb_message(struct rio_mport *mport, struct rio_dev *rdev, int mbox,
 356                         void *buffer, size_t len)
 357 {
 358         struct rio_priv *priv = mport->priv;
 359         u32 omr;
 360         struct rio_tx_desc *desc = (struct rio_tx_desc *)priv->msg_tx_ring.virt
 361                                         + priv->msg_tx_ring.tx_slot;
 362         int ret = 0;
 363
 364         pr_debug
 365             ("RIO: rio_hw_add_outb_message(): destid %4.4x mbox %d buffer %8.8x len %8.8x\n",
 366              rdev->destid, mbox, (int)buffer, len);
 367
 368         if ((len < 8) || (len > RIO_MAX_MSG_SIZE)) {
 369                 ret = -EINVAL;
 370                 goto out;
 371         }
 372
 373         /* Copy and clear rest of buffer */
 374         memcpy(priv->msg_tx_ring.virt_buffer[priv->msg_tx_ring.tx_slot], buffer,
 375                         len);
 376         if (len < (RIO_MAX_MSG_SIZE - 4))
 377                 memset(priv->msg_tx_ring.virt_buffer[priv->msg_tx_ring.tx_slot]
 378                                 + len, 0, RIO_MAX_MSG_SIZE - len);
 379
 380         switch (mport->phy_type) {
 381         case RIO_PHY_PARALLEL:
 382                 /* Set mbox field for message */
 383                 desc->dport = mbox & 0x3;
 384
 385                 /* Enable EOMI interrupt, set priority, and set destid */
 386                 desc->dattr = 0x28000000 | (rdev->destid << 2);
 387                 break;
 388         case RIO_PHY_SERIAL:
 389                 /* Set mbox field for message, and set destid */
 390                 desc->dport = (rdev->destid << 16) | (mbox & 0x3);
 391
 392                 /* Enable EOMI interrupt and priority */
 393                 desc->dattr = 0x28000000;
 394                 break;
 395         }
 396
 397         /* Set transfer size aligned to next power of 2 (in double words) */
 398         desc->dwcnt = is_power_of_2(len) ? len : 1 << get_bitmask_order(len);
 399
 400         /* Set snooping and source buffer address */
 401         desc->saddr = 0x00000004
 402                 | priv->msg_tx_ring.phys_buffer[priv->msg_tx_ring.tx_slot];
 403
 404         /* Increment enqueue pointer */
 405         omr = in_be32(&priv->msg_regs->omr);
 406         out_be32(&priv->msg_regs->omr, omr | RIO_MSG_OMR_MUI);
 407
 408         /* Go to next descriptor */
 409         if (++priv->msg_tx_ring.tx_slot == priv->msg_tx_ring.size)
 410                 priv->msg_tx_ring.tx_slot = 0;
 411
 412       out:
 413         return ret;
 414 }
 415
 416 EXPORT_SYMBOL_GPL(rio_hw_add_outb_message);
 417
 418 /**
 419  * fsl_rio_tx_handler - MPC85xx outbound message interrupt handler
 420  * @irq: Linux interrupt number
 421  * @dev_instance: Pointer to interrupt-specific data
 422  *
 423  * Handles outbound message interrupts. Executes a register outbound
 424  * mailbox event handler and acks the interrupt occurrence.
 425  */
 426 static irqreturn_t
 427 fsl_rio_tx_handler(int irq, void *dev_instance)
 428 {
 429         int osr;
 430         struct rio_mport *port = (struct rio_mport *)dev_instance;
 431         struct rio_priv *priv = port->priv;
 432
 433         osr = in_be32(&priv->msg_regs->osr);
 434
 435         if (osr & RIO_MSG_OSR_TE) {
 436                 pr_info("RIO: outbound message transmission error\n");
 437                 out_be32(&priv->msg_regs->osr, RIO_MSG_OSR_TE);
 438                 goto out;
 439         }
 440
 441         if (osr & RIO_MSG_OSR_QOI) {
 442                 pr_info("RIO: outbound message queue overflow\n");
 443                 out_be32(&priv->msg_regs->osr, RIO_MSG_OSR_QOI);
 444                 goto out;
 445         }
 446
 447         if (osr & RIO_MSG_OSR_EOMI) {
 448                 u32 dqp = in_be32(&priv->msg_regs->odqdpar);
 449                 int slot = (dqp - priv->msg_tx_ring.phys) >> 5;
 450                 port->outb_msg[0].mcback(port, priv->msg_tx_ring.dev_id, -1,
 451                                 slot);
 452
 453                 /* Ack the end-of-message interrupt */
 454                 out_be32(&priv->msg_regs->osr, RIO_MSG_OSR_EOMI);
 455         }
 456
 457       out:
 458         return IRQ_HANDLED;
 459 }
 460
 461 /**
 462  * rio_open_outb_mbox - Initialize MPC85xx outbound mailbox
 463  * @mport: Master port implementing the outbound message unit
 464  * @dev_id: Device specific pointer to pass on event
 465  * @mbox: Mailbox to open
 466  * @entries: Number of entries in the outbound mailbox ring
 467  *
 468  * Initializes buffer ring, request the outbound message interrupt,
 469  * and enables the outbound message unit. Returns %0 on success and
 470  * %-EINVAL or %-ENOMEM on failure.
 471  */
 472 int rio_open_outb_mbox(struct rio_mport *mport, void *dev_id, int mbox, int entries)
 473 {
 474         int i, j, rc = 0;
 475         struct rio_priv *priv = mport->priv;
 476
 477         if ((entries < RIO_MIN_TX_RING_SIZE) ||
 478             (entries > RIO_MAX_TX_RING_SIZE) || (!is_power_of_2(entries))) {
 479                 rc = -EINVAL;
 480                 goto out;
 481         }
 482
 483         /* Initialize shadow copy ring */
 484         priv->msg_tx_ring.dev_id = dev_id;
 485         priv->msg_tx_ring.size = entries;
 486
 487         for (i = 0; i < priv->msg_tx_ring.size; i++) {
 488                 priv->msg_tx_ring.virt_buffer[i] =
 489                         dma_alloc_coherent(priv->dev, RIO_MSG_BUFFER_SIZE,
 490                                 &priv->msg_tx_ring.phys_buffer[i], GFP_KERNEL);
 491                 if (!priv->msg_tx_ring.virt_buffer[i]) {
 492                         rc = -ENOMEM;
 493                         for (j = 0; j < priv->msg_tx_ring.size; j++)
 494                                 if (priv->msg_tx_ring.virt_buffer[j])
 495                                         dma_free_coherent(priv->dev,
 496                                                         RIO_MSG_BUFFER_SIZE,
 497                                                         priv->msg_tx_ring.
 498                                                         virt_buffer[j],
 499                                                         priv->msg_tx_ring.
 500                                                         phys_buffer[j]);
 501                         goto out;
 502                 }
 503         }
 504
 505         /* Initialize outbound message descriptor ring */
 506         priv->msg_tx_ring.virt = dma_alloc_coherent(priv->dev,
 507                                 priv->msg_tx_ring.size * RIO_MSG_DESC_SIZE,
 508                                 &priv->msg_tx_ring.phys, GFP_KERNEL);
 509         if (!priv->msg_tx_ring.virt) {
 510                 rc = -ENOMEM;
 511                 goto out_dma;
 512         }
 513         memset(priv->msg_tx_ring.virt, 0,
 514                         priv->msg_tx_ring.size * RIO_MSG_DESC_SIZE);
 515         priv->msg_tx_ring.tx_slot = 0;
 516
 517         /* Point dequeue/enqueue pointers at first entry in ring */
 518         out_be32(&priv->msg_regs->odqdpar, priv->msg_tx_ring.phys);
 519         out_be32(&priv->msg_regs->odqepar, priv->msg_tx_ring.phys);
 520
 521         /* Configure for snooping */
 522         out_be32(&priv->msg_regs->osar, 0x00000004);
 523
 524         /* Clear interrupt status */
 525         out_be32(&priv->msg_regs->osr, 0x000000b3);
 526
 527         /* Hook up outbound message handler */
 528         rc = request_irq(IRQ_RIO_TX(mport), fsl_rio_tx_handler, 0,
 529                          "msg_tx", (void *)mport);
 530         if (rc < 0)
 531                 goto out_irq;
 532
 533         /*
 534          * Configure outbound message unit
 535          *      Snooping
 536          *      Interrupts (all enabled, except QEIE)
 537          *      Chaining mode
 538          *      Disable
 539          */
 540         out_be32(&priv->msg_regs->omr, 0x00100220);
 541
 542         /* Set number of entries */
 543         out_be32(&priv->msg_regs->omr,
 544                  in_be32(&priv->msg_regs->omr) |
 545                  ((get_bitmask_order(entries) - 2) << 12));
 546
 547         /* Now enable the unit */
 548         out_be32(&priv->msg_regs->omr, in_be32(&priv->msg_regs->omr) | 0x1);
 549
 550       out:
 551         return rc;
 552
 553       out_irq:
 554         dma_free_coherent(priv->dev,
 555                           priv->msg_tx_ring.size * RIO_MSG_DESC_SIZE,
 556                           priv->msg_tx_ring.virt, priv->msg_tx_ring.phys);
 557
 558       out_dma:
 559         for (i = 0; i < priv->msg_tx_ring.size; i++)
 560                 dma_free_coherent(priv->dev, RIO_MSG_BUFFER_SIZE,
 561                                   priv->msg_tx_ring.virt_buffer[i],
 562                                   priv->msg_tx_ring.phys_buffer[i]);
 563
 564         return rc;
 565 }
 566
 567 /**
 568  * rio_close_outb_mbox - Shut down MPC85xx outbound mailbox
 569  * @mport: Master port implementing the outbound message unit
 570  * @mbox: Mailbox to close
 571  *
 572  * Disables the outbound message unit, free all buffers, and
 573  * frees the outbound message interrupt.
 574  */
 575 void rio_close_outb_mbox(struct rio_mport *mport, int mbox)
 576 {
 577         struct rio_priv *priv = mport->priv;
 578         /* Disable inbound message unit */
 579         out_be32(&priv->msg_regs->omr, 0);
 580
 581         /* Free ring */
 582         dma_free_coherent(priv->dev,
 583                           priv->msg_tx_ring.size * RIO_MSG_DESC_SIZE,
 584                           priv->msg_tx_ring.virt, priv->msg_tx_ring.phys);
 585
 586         /* Free interrupt */
 587         free_irq(IRQ_RIO_TX(mport), (void *)mport);
 588 }
 589
 590 /**
 591  * fsl_rio_rx_handler - MPC85xx inbound message interrupt handler
 592  * @irq: Linux interrupt number
 593  * @dev_instance: Pointer to interrupt-specific data
 594  *
 595  * Handles inbound message interrupts. Executes a registered inbound
 596  * mailbox event handler and acks the interrupt occurrence.
 597  */
 598 static irqreturn_t
 599 fsl_rio_rx_handler(int irq, void *dev_instance)
 600 {
 601         int isr;
 602         struct rio_mport *port = (struct rio_mport *)dev_instance;
 603         struct rio_priv *priv = port->priv;
 604
 605         isr = in_be32(&priv->msg_regs->isr);
 606
 607         if (isr & RIO_MSG_ISR_TE) {
 608                 pr_info("RIO: inbound message reception error\n");
 609                 out_be32((void *)&priv->msg_regs->isr, RIO_MSG_ISR_TE);
 610                 goto out;
 611         }
 612
 613         /* XXX Need to check/dispatch until queue empty */
 614         if (isr & RIO_MSG_ISR_DIQI) {
 615                 /*
 616                  * We implement *only* mailbox 0, but can receive messages
 617                  * for any mailbox/letter to that mailbox destination. So,
 618                  * make the callback with an unknown/invalid mailbox number
 619                  * argument.
 620                  */
 621                 port->inb_msg[0].mcback(port, priv->msg_rx_ring.dev_id, -1, -1);
 622
 623                 /* Ack the queueing interrupt */
 624                 out_be32(&priv->msg_regs->isr, RIO_MSG_ISR_DIQI);
 625         }
 626
 627       out:
 628         return IRQ_HANDLED;
 629 }
 630
 631 /**
 632  * rio_open_inb_mbox - Initialize MPC85xx inbound mailbox
 633  * @mport: Master port implementing the inbound message unit
 634  * @dev_id: Device specific pointer to pass on event
 635  * @mbox: Mailbox to open
 636  * @entries: Number of entries in the inbound mailbox ring
 637  *
 638  * Initializes buffer ring, request the inbound message interrupt,
 639  * and enables the inbound message unit. Returns %0 on success
 640  * and %-EINVAL or %-ENOMEM on failure.
 641  */
 642 int rio_open_inb_mbox(struct rio_mport *mport, void *dev_id, int mbox, int entries)
 643 {
 644         int i, rc = 0;
 645         struct rio_priv *priv = mport->priv;
 646
 647         if ((entries < RIO_MIN_RX_RING_SIZE) ||
 648             (entries > RIO_MAX_RX_RING_SIZE) || (!is_power_of_2(entries))) {
 649                 rc = -EINVAL;
 650                 goto out;
 651         }
 652
 653         /* Initialize client buffer ring */
 654         priv->msg_rx_ring.dev_id = dev_id;
 655         priv->msg_rx_ring.size = entries;
 656         priv->msg_rx_ring.rx_slot = 0;
 657         for (i = 0; i < priv->msg_rx_ring.size; i++)
 658                 priv->msg_rx_ring.virt_buffer[i] = NULL;
 659
 660         /* Initialize inbound message ring */
 661         priv->msg_rx_ring.virt = dma_alloc_coherent(priv->dev,
 662                                 priv->msg_rx_ring.size * RIO_MAX_MSG_SIZE,
 663                                 &priv->msg_rx_ring.phys, GFP_KERNEL);
 664         if (!priv->msg_rx_ring.virt) {
 665                 rc = -ENOMEM;
 666                 goto out;
 667         }
 668
 669         /* Point dequeue/enqueue pointers at first entry in ring */
 670         out_be32(&priv->msg_regs->ifqdpar, (u32) priv->msg_rx_ring.phys);
 671         out_be32(&priv->msg_regs->ifqepar, (u32) priv->msg_rx_ring.phys);
 672
 673         /* Clear interrupt status */
 674         out_be32(&priv->msg_regs->isr, 0x00000091);
 675
 676         /* Hook up inbound message handler */
 677         rc = request_irq(IRQ_RIO_RX(mport), fsl_rio_rx_handler, 0,
 678                          "msg_rx", (void *)mport);
 679         if (rc < 0) {
 680                 dma_free_coherent(priv->dev, RIO_MSG_BUFFER_SIZE,
 681                                   priv->msg_tx_ring.virt_buffer[i],
 682                                   priv->msg_tx_ring.phys_buffer[i]);
 683                 goto out;
 684         }
 685
 686         /*
 687          * Configure inbound message unit:
 688          *      Snooping
 689          *      4KB max message size
 690          *      Unmask all interrupt sources
 691          *      Disable
 692          */
 693         out_be32(&priv->msg_regs->imr, 0x001b0060);
 694
 695         /* Set number of queue entries */
 696         setbits32(&priv->msg_regs->imr, (get_bitmask_order(entries) - 2) << 12);
 697
 698         /* Now enable the unit */
 699         setbits32(&priv->msg_regs->imr, 0x1);
 700
 701       out:
 702         return rc;
 703 }
 704
 705 /**
 706  * rio_close_inb_mbox - Shut down MPC85xx inbound mailbox
 707  * @mport: Master port implementing the inbound message unit
 708  * @mbox: Mailbox to close
 709  *
 710  * Disables the inbound message unit, free all buffers, and
 711  * frees the inbound message interrupt.
 712  */
 713 void rio_close_inb_mbox(struct rio_mport *mport, int mbox)
 714 {
 715         struct rio_priv *priv = mport->priv;
 716         /* Disable inbound message unit */
 717         out_be32(&priv->msg_regs->imr, 0);
 718
 719         /* Free ring */
 720         dma_free_coherent(priv->dev, priv->msg_rx_ring.size * RIO_MAX_MSG_SIZE,
 721                           priv->msg_rx_ring.virt, priv->msg_rx_ring.phys);
 722
 723         /* Free interrupt */
 724         free_irq(IRQ_RIO_RX(mport), (void *)mport);
 725 }
 726
 727 /**
 728  * rio_hw_add_inb_buffer - Add buffer to the MPC85xx inbound message queue
 729  * @mport: Master port implementing the inbound message unit
 730  * @mbox: Inbound mailbox number
 731  * @buf: Buffer to add to inbound queue
 732  *
 733  * Adds the @buf buffer to the MPC85xx inbound message queue. Returns
 734  * %0 on success or %-EINVAL on failure.
 735  */
 736 int rio_hw_add_inb_buffer(struct rio_mport *mport, int mbox, void *buf)
 737 {
 738         int rc = 0;
 739         struct rio_priv *priv = mport->priv;
 740
 741         pr_debug("RIO: rio_hw_add_inb_buffer(), msg_rx_ring.rx_slot %d\n",
 742                  priv->msg_rx_ring.rx_slot);
 743
 744         if (priv->msg_rx_ring.virt_buffer[priv->msg_rx_ring.rx_slot]) {
 745                 printk(KERN_ERR
 746                        "RIO: error adding inbound buffer %d, buffer exists\n",
 747                        priv->msg_rx_ring.rx_slot);
 748                 rc = -EINVAL;
 749                 goto out;
 750         }
 751
 752         priv->msg_rx_ring.virt_buffer[priv->msg_rx_ring.rx_slot] = buf;
 753         if (++priv->msg_rx_ring.rx_slot == priv->msg_rx_ring.size)
 754                 priv->msg_rx_ring.rx_slot = 0;
 755
 756       out:
 757         return rc;
 758 }
 759
 760 EXPORT_SYMBOL_GPL(rio_hw_add_inb_buffer);
 761
 762 /**
 763  * rio_hw_get_inb_message - Fetch inbound message from the MPC85xx message unit
 764  * @mport: Master port implementing the inbound message unit
 765  * @mbox: Inbound mailbox number
 766  *
 767  * Gets the next available inbound message from the inbound message queue.
 768  * A pointer to the message is returned on success or NULL on failure.
 769  */
 770 void *rio_hw_get_inb_message(struct rio_mport *mport, int mbox)
 771 {
 772         struct rio_priv *priv = mport->priv;
 773         u32 phys_buf, virt_buf;
 774         void *buf = NULL;
 775         int buf_idx;
 776
 777         phys_buf = in_be32(&priv->msg_regs->ifqdpar);
 778
 779         /* If no more messages, then bail out */
 780         if (phys_buf == in_be32(&priv->msg_regs->ifqepar))
 781                 goto out2;
 782
 783         virt_buf = (u32) priv->msg_rx_ring.virt + (phys_buf
 784                                                 - priv->msg_rx_ring.phys);
 785         buf_idx = (phys_buf - priv->msg_rx_ring.phys) / RIO_MAX_MSG_SIZE;
 786         buf = priv->msg_rx_ring.virt_buffer[buf_idx];
 787
 788         if (!buf) {
 789                 printk(KERN_ERR
 790                        "RIO: inbound message copy failed, no buffers\n");
 791                 goto out1;
 792         }
 793
 794         /* Copy max message size, caller is expected to allocate that big */
 795         memcpy(buf, (void *)virt_buf, RIO_MAX_MSG_SIZE);
 796
 797         /* Clear the available buffer */
 798         priv->msg_rx_ring.virt_buffer[buf_idx] = NULL;
 799
 800       out1:
 801         setbits32(&priv->msg_regs->imr, RIO_MSG_IMR_MI);
 802
 803       out2:
 804         return buf;
 805 }
 806
 807 EXPORT_SYMBOL_GPL(rio_hw_get_inb_message);
 808
 809 /**
 810  * fsl_rio_dbell_handler - MPC85xx doorbell interrupt handler
 811  * @irq: Linux interrupt number
 812  * @dev_instance: Pointer to interrupt-specific data
 813  *
 814  * Handles doorbell interrupts. Parses a list of registered
 815  * doorbell event handlers and executes a matching event handler.
 816  */
 817 static irqreturn_t
 818 fsl_rio_dbell_handler(int irq, void *dev_instance)
 819 {
 820         int dsr;
 821         struct rio_mport *port = (struct rio_mport *)dev_instance;
 822         struct rio_priv *priv = port->priv;
 823
 824         dsr = in_be32(&priv->msg_regs->dsr);
 825
 826         if (dsr & DOORBELL_DSR_TE) {
 827                 pr_info("RIO: doorbell reception error\n");
 828                 out_be32(&priv->msg_regs->dsr, DOORBELL_DSR_TE);
 829                 goto out;
 830         }
 831
 832         if (dsr & DOORBELL_DSR_QFI) {
 833                 pr_info("RIO: doorbell queue full\n");
 834                 out_be32(&priv->msg_regs->dsr, DOORBELL_DSR_QFI);
 835                 goto out;
 836         }
 837
 838         /* XXX Need to check/dispatch until queue empty */
 839         if (dsr & DOORBELL_DSR_DIQI) {
 840                 u32 dmsg =
 841                     (u32) priv->dbell_ring.virt +
 842                     (in_be32(&priv->msg_regs->dqdpar) & 0xfff);
 843                 struct rio_dbell *dbell;
 844                 int found = 0;
 845
 846                 pr_debug
 847                     ("RIO: processing doorbell, sid %2.2x tid %2.2x info %4.4x\n",
 848                      DBELL_SID(dmsg), DBELL_TID(dmsg), DBELL_INF(dmsg));
 849
 850                 list_for_each_entry(dbell, &port->dbells, node) {
 851                         if ((dbell->res->start <= DBELL_INF(dmsg)) &&
 852                             (dbell->res->end >= DBELL_INF(dmsg))) {
 853                                 found = 1;
 854                                 break;
 855                         }
 856                 }
 857                 if (found) {
 858                         dbell->dinb(port, dbell->dev_id, DBELL_SID(dmsg), DBELL_TID(dmsg),
 859                                     DBELL_INF(dmsg));
 860                 } else {
 861                         pr_debug
 862                             ("RIO: spurious doorbell, sid %2.2x tid %2.2x info %4.4x\n",
 863                              DBELL_SID(dmsg), DBELL_TID(dmsg), DBELL_INF(dmsg));
 864                 }
 865                 setbits32(&priv->msg_regs->dmr, DOORBELL_DMR_DI);
 866                 out_be32(&priv->msg_regs->dsr, DOORBELL_DSR_DIQI);
 867         }
 868
 869       out:
 870         return IRQ_HANDLED;
 871 }
 872
 873 /**
 874  * fsl_rio_doorbell_init - MPC85xx doorbell interface init
 875  * @mport: Master port implementing the inbound doorbell unit
 876  *
 877  * Initializes doorbell unit hardware and inbound DMA buffer
 878  * ring. Called from fsl_rio_setup(). Returns %0 on success
 879  * or %-ENOMEM on failure.
 880  */
 881 static int fsl_rio_doorbell_init(struct rio_mport *mport)
 882 {
 883         struct rio_priv *priv = mport->priv;
 884         int rc = 0;
 885
 886         /* Map outbound doorbell window immediately after maintenance window */
 887         priv->dbell_win = ioremap(mport->iores.start + RIO_MAINT_WIN_SIZE,
 888                             RIO_DBELL_WIN_SIZE);
 889         if (!priv->dbell_win) {
 890                 printk(KERN_ERR
 891                        "RIO: unable to map outbound doorbell window\n");
 892                 rc = -ENOMEM;
 893                 goto out;
 894         }
 895
 896         /* Initialize inbound doorbells */
 897         priv->dbell_ring.virt = dma_alloc_coherent(priv->dev, 512 *
 898                     DOORBELL_MESSAGE_SIZE, &priv->dbell_ring.phys, GFP_KERNEL);
 899         if (!priv->dbell_ring.virt) {
 900                 printk(KERN_ERR "RIO: unable allocate inbound doorbell ring\n");
 901                 rc = -ENOMEM;
 902                 iounmap(priv->dbell_win);
 903                 goto out;
 904         }
 905
 906         /* Point dequeue/enqueue pointers at first entry in ring */
 907         out_be32(&priv->msg_regs->dqdpar, (u32) priv->dbell_ring.phys);
 908         out_be32(&priv->msg_regs->dqepar, (u32) priv->dbell_ring.phys);
 909
 910         /* Clear interrupt status */
 911         out_be32(&priv->msg_regs->dsr, 0x00000091);
 912
 913         /* Hook up doorbell handler */
 914         rc = request_irq(IRQ_RIO_BELL(mport), fsl_rio_dbell_handler, 0,
 915                          "dbell_rx", (void *)mport);
 916         if (rc < 0) {
 917                 iounmap(priv->dbell_win);
 918                 dma_free_coherent(priv->dev, 512 * DOORBELL_MESSAGE_SIZE,
 919                                   priv->dbell_ring.virt, priv->dbell_ring.phys);
 920                 printk(KERN_ERR
 921                        "MPC85xx RIO: unable to request inbound doorbell irq");
 922                 goto out;
 923         }
 924
 925         /* Configure doorbells for snooping, 512 entries, and enable */
 926         out_be32(&priv->msg_regs->dmr, 0x00108161);
 927
 928       out:
 929         return rc;
 930 }
 931
 932 static char *cmdline = NULL;
 933
 934 static int fsl_rio_get_hdid(int index)
 935 {
 936         /* XXX Need to parse multiple entries in some format */
 937         if (!cmdline)
 938                 return -1;
 939
 940         return simple_strtol(cmdline, NULL, 0);
 941 }
 942
 943 static int fsl_rio_get_cmdline(char *s)
 944 {
 945         if (!s)
 946                 return 0;
 947
 948         cmdline = s;
 949         return 1;
 950 }
 951
 952 __setup("riohdid=", fsl_rio_get_cmdline);
 953
 954 static inline void fsl_rio_info(struct device *dev, u32 ccsr)
 955 {
 956         const char *str;
 957         if (ccsr & 1) {
 958                 /* Serial phy */
 959                 switch (ccsr >> 30) {
 960                 case 0:
 961                         str = "1";
 962                         break;
 963                 case 1:
 964                         str = "4";
 965                         break;
 966                 default:
 967                         str = "Unknown";
 968                         break;
 969                 }
 970                 dev_info(dev, "Hardware port width: %s\n", str);
 971
 972                 switch ((ccsr >> 27) & 7) {
 973                 case 0:
 974                         str = "Single-lane 0";
 975                         break;
 976                 case 1:
 977                         str = "Single-lane 2";
 978                         break;
 979                 case 2:
 980                         str = "Four-lane";
 981                         break;
 982                 default:
 983                         str = "Unknown";
 984                         break;
 985                 }
 986                 dev_info(dev, "Training connection status: %s\n", str);
 987         } else {
 988                 /* Parallel phy */
 989                 if (!(ccsr & 0x80000000))
 990                         dev_info(dev, "Output port operating in 8-bit mode\n");
 991                 if (!(ccsr & 0x08000000))
 992                         dev_info(dev, "Input port operating in 8-bit mode\n");
 993         }
 994 }
 995
 996 /**
 997  * fsl_rio_setup - Setup Freescale PowerPC RapidIO interface
 998  * @dev: of_device pointer
 999  *
1000  * Initializes MPC85xx RapidIO hardware interface, configures
1001  * master port with system-specific info, and registers the
1002  * master port with the RapidIO subsystem.
1003  */
1004 int fsl_rio_setup(struct of_device *dev)
1005 {
1006         struct rio_ops *ops;
1007         struct rio_mport *port;
1008         struct rio_priv *priv;
1009         int rc = 0;
1010         const u32 *dt_range, *cell;
1011         struct resource regs;
1012         int rlen;
1013         u32 ccsr;
1014         u64 law_start, law_size;
1015         int paw, aw, sw;
1016
1017         if (!dev->node) {
1018                 dev_err(&dev->dev, "Device OF-Node is NULL");
1019                 return -EFAULT;
1020         }
1021
1022         rc = of_address_to_resource(dev->node, 0, &regs);
1023         if (rc) {
1024                 dev_err(&dev->dev, "Can't get %s property 'reg'\n",
1025                                 dev->node->full_name);
1026                 return -EFAULT;
1027         }
1028         dev_info(&dev->dev, "Of-device full name %s\n", dev->node->full_name);
1029         dev_info(&dev->dev, "Regs: %pR\n", &regs);
1030
1031         dt_range = of_get_property(dev->node, "ranges", &rlen);
1032         if (!dt_range) {
1033                 dev_err(&dev->dev, "Can't get %s property 'ranges'\n",
1034                                 dev->node->full_name);
1035                 return -EFAULT;
1036         }
1037
1038         /* Get node address wide */
1039         cell = of_get_property(dev->node, "#address-cells", NULL);
1040         if (cell)
1041                 aw = *cell;
1042         else
1043                 aw = of_n_addr_cells(dev->node);
1044         /* Get node size wide */
1045         cell = of_get_property(dev->node, "#size-cells", NULL);
1046         if (cell)
1047                 sw = *cell;
1048         else
1049                 sw = of_n_size_cells(dev->node);
1050         /* Get parent address wide wide */
1051         paw = of_n_addr_cells(dev->node);
1052
1053         law_start = of_read_number(dt_range + aw, paw);
1054         law_size = of_read_number(dt_range + aw + paw, sw);
1055
1056         dev_info(&dev->dev, "LAW start 0x%016llx, size 0x%016llx.\n",
1057                         law_start, law_size);
1058
1059         ops = kmalloc(sizeof(struct rio_ops), GFP_KERNEL);
1060         if (!ops) {
1061                 rc = -ENOMEM;
1062                 goto err_ops;
1063         }
1064         ops->lcread = fsl_local_config_read;
1065         ops->lcwrite = fsl_local_config_write;
1066         ops->cread = fsl_rio_config_read;
1067         ops->cwrite = fsl_rio_config_write;
1068         ops->dsend = fsl_rio_doorbell_send;
1069
1070         port = kzalloc(sizeof(struct rio_mport), GFP_KERNEL);
1071         if (!port) {
1072                 rc = -ENOMEM;
1073                 goto err_port;
1074         }
1075         port->id = 0;
1076         port->index = 0;
1077
1078         priv = kzalloc(sizeof(struct rio_priv), GFP_KERNEL);
1079         if (!priv) {
1080                 printk(KERN_ERR "Can't alloc memory for 'priv'\n");
1081                 rc = -ENOMEM;
1082                 goto err_priv;
1083         }
1084
1085         INIT_LIST_HEAD(&port->dbells);
1086         port->iores.start = law_start;
1087         port->iores.end = law_start + law_size - 1;
1088         port->iores.flags = IORESOURCE_MEM;
1089         port->iores.name = "rio_io_win";
1090
1091         priv->bellirq = irq_of_parse_and_map(dev->node, 2);
1092         priv->txirq = irq_of_parse_and_map(dev->node, 3);
1093         priv->rxirq = irq_of_parse_and_map(dev->node, 4);
1094         dev_info(&dev->dev, "bellirq: %d, txirq: %d, rxirq %d\n", priv->bellirq,
1095                                 priv->txirq, priv->rxirq);
1096
1097         rio_init_dbell_res(&port->riores[RIO_DOORBELL_RESOURCE], 0, 0xffff);
1098         rio_init_mbox_res(&port->riores[RIO_INB_MBOX_RESOURCE], 0, 0);
1099         rio_init_mbox_res(&port->riores[RIO_OUTB_MBOX_RESOURCE], 0, 0);
1100         strcpy(port->name, "RIO0 mport");
1101
1102         priv->dev = &dev->dev;
1103
1104         port->ops = ops;
1105         port->host_deviceid = fsl_rio_get_hdid(port->id);
1106
1107         port->priv = priv;
1108         rio_register_mport(port);
1109
1110         priv->regs_win = ioremap(regs.start, regs.end - regs.start + 1);
1111
1112         /* Probe the master port phy type */
1113         ccsr = in_be32(priv->regs_win + RIO_CCSR);
1114         port->phy_type = (ccsr & 1) ? RIO_PHY_SERIAL : RIO_PHY_PARALLEL;
1115         dev_info(&dev->dev, "RapidIO PHY type: %s\n",
1116                         (port->phy_type == RIO_PHY_PARALLEL) ? "parallel" :
1117                         ((port->phy_type == RIO_PHY_SERIAL) ? "serial" :
1118                          "unknown"));
1119         /* Checking the port training status */
1120         if (in_be32((priv->regs_win + RIO_ESCSR)) & 1) {
1121                 dev_err(&dev->dev, "Port is not ready. "
1122                                    "Try to restart connection...\n");
1123                 switch (port->phy_type) {
1124                 case RIO_PHY_SERIAL:
1125                         /* Disable ports */
1126                         out_be32(priv->regs_win + RIO_CCSR, 0);
1127                         /* Set 1x lane */
1128                         setbits32(priv->regs_win + RIO_CCSR, 0x02000000);
1129                         /* Enable ports */
1130                         setbits32(priv->regs_win + RIO_CCSR, 0x00600000);
1131                         break;
1132                 case RIO_PHY_PARALLEL:
1133                         /* Disable ports */
1134                         out_be32(priv->regs_win + RIO_CCSR, 0x22000000);
1135                         /* Enable ports */
1136                         out_be32(priv->regs_win + RIO_CCSR, 0x44000000);
1137                         break;
1138                 }
1139                 msleep(100);
1140                 if (in_be32((priv->regs_win + RIO_ESCSR)) & 1) {
1141                         dev_err(&dev->dev, "Port restart failed.\n");
1142                         rc = -ENOLINK;
1143                         goto err;
1144                 }
1145                 dev_info(&dev->dev, "Port restart success!\n");
1146         }
1147         fsl_rio_info(&dev->dev, ccsr);
1148
1149         port->sys_size = (in_be32((priv->regs_win + RIO_PEF_CAR))
1150                                         & RIO_PEF_CTLS) >> 4;
1151         dev_info(&dev->dev, "RapidIO Common Transport System size: %d\n",
1152                         port->sys_size ? 65536 : 256);
1153
1154         priv->atmu_regs = (struct rio_atmu_regs *)(priv->regs_win
1155                                         + RIO_ATMU_REGS_OFFSET);
1156         priv->maint_atmu_regs = priv->atmu_regs + 1;
1157         priv->dbell_atmu_regs = priv->atmu_regs + 2;
1158         priv->msg_regs = (struct rio_msg_regs *)(priv->regs_win +
1159                                 ((port->phy_type == RIO_PHY_SERIAL) ?
1160                                 RIO_S_MSG_REGS_OFFSET : RIO_P_MSG_REGS_OFFSET));
1161
1162         /* Set to receive any dist ID for serial RapidIO controller. */
1163         if (port->phy_type == RIO_PHY_SERIAL)
1164                 out_be32((priv->regs_win + RIO_ISR_AACR), RIO_ISR_AACR_AA);
1165
1166         /* Configure maintenance transaction window */
1167         out_be32(&priv->maint_atmu_regs->rowbar, law_start >> 12);
1168         out_be32(&priv->maint_atmu_regs->rowar, 0x80077015);    /* 4M */
1169
1170         priv->maint_win = ioremap(law_start, RIO_MAINT_WIN_SIZE);
1171
1172         /* Configure outbound doorbell window */
1173         out_be32(&priv->dbell_atmu_regs->rowbar,
1174                         (law_start + RIO_MAINT_WIN_SIZE) >> 12);
1175         out_be32(&priv->dbell_atmu_regs->rowar, 0x8004200b);    /* 4k */
1176         fsl_rio_doorbell_init(port);
1177
1178         return 0;
1179 err:
1180         iounmap(priv->regs_win);
1181         kfree(priv);
1182 err_priv:
1183         kfree(port);
1184 err_port:
1185         kfree(ops);
1186 err_ops:
1187         return rc;
1188 }
1189
1190 /* The probe function for RapidIO peer-to-peer network.
1191  */
1192 static int __devinit fsl_of_rio_rpn_probe(struct of_device *dev,
1193                                      const struct of_device_id *match)
1194 {
1195         int rc;
1196         printk(KERN_INFO "Setting up RapidIO peer-to-peer network %s\n",
1197                         dev->node->full_name);
1198
1199         rc = fsl_rio_setup(dev);
1200         if (rc)
1201                 goto out;
1202
1203         /* Enumerate all registered ports */
1204         rc = rio_init_mports();
1205 out:
1206         return rc;
1207 };
1208
1209 static const struct of_device_id fsl_of_rio_rpn_ids[] = {
1210         {
1211                 .compatible = "fsl,rapidio-delta",
1212         },
1213         {},
1214 };
1215
1216 static struct of_platform_driver fsl_of_rio_rpn_driver = {
1217         .name = "fsl-of-rio",
1218         .match_table = fsl_of_rio_rpn_ids,
1219         .probe = fsl_of_rio_rpn_probe,
1220 };
1221
1222 static __init int fsl_of_rio_rpn_init(void)
1223 {
1224         return of_register_platform_driver(&fsl_of_rio_rpn_driver);
1225 }
1226
1227 subsys_initcall(fsl_of_rio_rpn_init);